diff options
Diffstat (limited to 'drivers')
91 files changed, 14056 insertions, 14006 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c index 356fac6..5a1cf25 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.c +++ b/drivers/infiniband/ulp/iser/iscsi_iser.c @@ -71,6 +71,10 @@ #include "iscsi_iser.h" +static struct scsi_host_template iscsi_iser_sht; +static struct iscsi_transport iscsi_iser_transport; +static struct scsi_transport_template *iscsi_iser_scsi_transport; + static unsigned int iscsi_max_lun = 512; module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); @@ -91,7 +95,6 @@ iscsi_iser_recv(struct iscsi_conn *conn, struct iscsi_hdr *hdr, char *rx_data, int rx_data_len) { int rc = 0; - uint32_t ret_itt; int datalen; int ahslen; @@ -107,12 +110,7 @@ iscsi_iser_recv(struct iscsi_conn *conn, /* read AHS */ ahslen = hdr->hlength * 4; - /* verify itt (itt encoding: age+cid+itt) */ - rc = iscsi_verify_itt(conn, hdr, &ret_itt); - - if (!rc) - rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); - + rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); if (rc && rc != ISCSI_ERR_NO_SCSI_CMD) goto error; @@ -123,25 +121,33 @@ error: /** - * iscsi_iser_cmd_init - Initialize iSCSI SCSI_READ or SCSI_WRITE commands + * iscsi_iser_task_init - Initialize task + * @task: iscsi task * - **/ + * Initialize the task for the scsi command or mgmt command. + */ static int -iscsi_iser_cmd_init(struct iscsi_cmd_task *ctask) +iscsi_iser_task_init(struct iscsi_task *task) { - struct iscsi_iser_conn *iser_conn = ctask->conn->dd_data; - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_iser_conn *iser_conn = task->conn->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; + + /* mgmt task */ + if (!task->sc) { + iser_task->desc.data = task->data; + return 0; + } - iser_ctask->command_sent = 0; - iser_ctask->iser_conn = iser_conn; - iser_ctask_rdma_init(iser_ctask); + iser_task->command_sent = 0; + iser_task->iser_conn = iser_conn; + iser_task_rdma_init(iser_task); return 0; } /** - * iscsi_mtask_xmit - xmit management(immediate) task + * iscsi_iser_mtask_xmit - xmit management(immediate) task * @conn: iscsi connection - * @mtask: task management task + * @task: task management task * * Notes: * The function can return -EAGAIN in which case caller must @@ -150,20 +156,19 @@ iscsi_iser_cmd_init(struct iscsi_cmd_task *ctask) * **/ static int -iscsi_iser_mtask_xmit(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask) +iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) { int error = 0; - debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, mtask->itt); + debug_scsi("task deq [cid %d itt 0x%x]\n", conn->id, task->itt); - error = iser_send_control(conn, mtask); + error = iser_send_control(conn, task); - /* since iser xmits control with zero copy, mtasks can not be recycled + /* since iser xmits control with zero copy, tasks can not be recycled * right after sending them. * The recycling scheme is based on whether a response is expected - * - if yes, the mtask is recycled at iscsi_complete_pdu - * - if no, the mtask is recycled at iser_snd_completion + * - if yes, the task is recycled at iscsi_complete_pdu + * - if no, the task is recycled at iser_snd_completion */ if (error && error != -ENOBUFS) iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); @@ -172,97 +177,86 @@ iscsi_iser_mtask_xmit(struct iscsi_conn *conn, } static int -iscsi_iser_ctask_xmit_unsol_data(struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask) +iscsi_iser_task_xmit_unsol_data(struct iscsi_conn *conn, + struct iscsi_task *task) { struct iscsi_data hdr; int error = 0; /* Send data-out PDUs while there's still unsolicited data to send */ - while (ctask->unsol_count > 0) { - iscsi_prep_unsolicit_data_pdu(ctask, &hdr); + while (task->unsol_count > 0) { + iscsi_prep_unsolicit_data_pdu(task, &hdr); debug_scsi("Sending data-out: itt 0x%x, data count %d\n", - hdr.itt, ctask->data_count); + hdr.itt, task->data_count); /* the buffer description has been passed with the command */ /* Send the command */ - error = iser_send_data_out(conn, ctask, &hdr); + error = iser_send_data_out(conn, task, &hdr); if (error) { - ctask->unsol_datasn--; - goto iscsi_iser_ctask_xmit_unsol_data_exit; + task->unsol_datasn--; + goto iscsi_iser_task_xmit_unsol_data_exit; } - ctask->unsol_count -= ctask->data_count; + task->unsol_count -= task->data_count; debug_scsi("Need to send %d more as data-out PDUs\n", - ctask->unsol_count); + task->unsol_count); } -iscsi_iser_ctask_xmit_unsol_data_exit: +iscsi_iser_task_xmit_unsol_data_exit: return error; } static int -iscsi_iser_ctask_xmit(struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask) +iscsi_iser_task_xmit(struct iscsi_task *task) { - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_conn *conn = task->conn; + struct iscsi_iser_task *iser_task = task->dd_data; int error = 0; - if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) { - BUG_ON(scsi_bufflen(ctask->sc) == 0); + if (!task->sc) + return iscsi_iser_mtask_xmit(conn, task); + + if (task->sc->sc_data_direction == DMA_TO_DEVICE) { + BUG_ON(scsi_bufflen(task->sc) == 0); debug_scsi("cmd [itt %x total %d imm %d unsol_data %d\n", - ctask->itt, scsi_bufflen(ctask->sc), - ctask->imm_count, ctask->unsol_count); + task->itt, scsi_bufflen(task->sc), + task->imm_count, task->unsol_count); } - debug_scsi("ctask deq [cid %d itt 0x%x]\n", - conn->id, ctask->itt); + debug_scsi("task deq [cid %d itt 0x%x]\n", + conn->id, task->itt); /* Send the cmd PDU */ - if (!iser_ctask->command_sent) { - error = iser_send_command(conn, ctask); + if (!iser_task->command_sent) { + error = iser_send_command(conn, task); if (error) - goto iscsi_iser_ctask_xmit_exit; - iser_ctask->command_sent = 1; + goto iscsi_iser_task_xmit_exit; + iser_task->command_sent = 1; } /* Send unsolicited data-out PDU(s) if necessary */ - if (ctask->unsol_count) - error = iscsi_iser_ctask_xmit_unsol_data(conn, ctask); + if (task->unsol_count) + error = iscsi_iser_task_xmit_unsol_data(conn, task); - iscsi_iser_ctask_xmit_exit: + iscsi_iser_task_xmit_exit: if (error && error != -ENOBUFS) iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); return error; } static void -iscsi_iser_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_iser_cleanup_task(struct iscsi_conn *conn, struct iscsi_task *task) { - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; - if (iser_ctask->status == ISER_TASK_STATUS_STARTED) { - iser_ctask->status = ISER_TASK_STATUS_COMPLETED; - iser_ctask_rdma_finalize(iser_ctask); - } -} - -static struct iser_conn * -iscsi_iser_ib_conn_lookup(__u64 ep_handle) -{ - struct iser_conn *ib_conn; - struct iser_conn *uib_conn = (struct iser_conn *)(unsigned long)ep_handle; + /* mgmt tasks do not need special cleanup */ + if (!task->sc) + return; - mutex_lock(&ig.connlist_mutex); - list_for_each_entry(ib_conn, &ig.connlist, conn_list) { - if (ib_conn == uib_conn) { - mutex_unlock(&ig.connlist_mutex); - return ib_conn; - } + if (iser_task->status == ISER_TASK_STATUS_STARTED) { + iser_task->status = ISER_TASK_STATUS_COMPLETED; + iser_task_rdma_finalize(iser_task); } - mutex_unlock(&ig.connlist_mutex); - iser_err("no conn exists for eph %llx\n",(unsigned long long)ep_handle); - return NULL; } static struct iscsi_cls_conn * @@ -272,7 +266,7 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) struct iscsi_cls_conn *cls_conn; struct iscsi_iser_conn *iser_conn; - cls_conn = iscsi_conn_setup(cls_session, conn_idx); + cls_conn = iscsi_conn_setup(cls_session, sizeof(*iser_conn), conn_idx); if (!cls_conn) return NULL; conn = cls_conn->dd_data; @@ -283,21 +277,11 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) */ conn->max_recv_dlength = 128; - iser_conn = kzalloc(sizeof(*iser_conn), GFP_KERNEL); - if (!iser_conn) - goto conn_alloc_fail; - - /* currently this is the only field which need to be initiated */ - rwlock_init(&iser_conn->lock); - + iser_conn = conn->dd_data; conn->dd_data = iser_conn; iser_conn->iscsi_conn = conn; return cls_conn; - -conn_alloc_fail: - iscsi_conn_teardown(cls_conn); - return NULL; } static void @@ -305,11 +289,18 @@ iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn) { struct iscsi_conn *conn = cls_conn->dd_data; struct iscsi_iser_conn *iser_conn = conn->dd_data; + struct iser_conn *ib_conn = iser_conn->ib_conn; iscsi_conn_teardown(cls_conn); - if (iser_conn->ib_conn) - iser_conn->ib_conn->iser_conn = NULL; - kfree(iser_conn); + /* + * Userspace will normally call the stop callback and + * already have freed the ib_conn, but if it goofed up then + * we free it here. + */ + if (ib_conn) { + ib_conn->iser_conn = NULL; + iser_conn_put(ib_conn); + } } static int @@ -320,6 +311,7 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_conn *conn = cls_conn->dd_data; struct iscsi_iser_conn *iser_conn; struct iser_conn *ib_conn; + struct iscsi_endpoint *ep; int error; error = iscsi_conn_bind(cls_session, cls_conn, is_leading); @@ -328,12 +320,14 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, /* the transport ep handle comes from user space so it must be * verified against the global ib connections list */ - ib_conn = iscsi_iser_ib_conn_lookup(transport_eph); - if (!ib_conn) { + ep = iscsi_lookup_endpoint(transport_eph); + if (!ep) { iser_err("can't bind eph %llx\n", (unsigned long long)transport_eph); return -EINVAL; } + ib_conn = ep->dd_data; + /* binds the iSER connection retrieved from the previously * connected ep_handle to the iSCSI layer connection. exchanges * connection pointers */ @@ -341,10 +335,30 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, iser_conn = conn->dd_data; ib_conn->iser_conn = iser_conn; iser_conn->ib_conn = ib_conn; + iser_conn_get(ib_conn); + return 0; +} - conn->recv_lock = &iser_conn->lock; +static void +iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) +{ + struct iscsi_conn *conn = cls_conn->dd_data; + struct iscsi_iser_conn *iser_conn = conn->dd_data; + struct iser_conn *ib_conn = iser_conn->ib_conn; - return 0; + /* + * Userspace may have goofed up and not bound the connection or + * might have only partially setup the connection. + */ + if (ib_conn) { + iscsi_conn_stop(cls_conn, flag); + /* + * There is no unbind event so the stop callback + * must release the ref from the bind. + */ + iser_conn_put(ib_conn); + } + iser_conn->ib_conn = NULL; } static int @@ -360,55 +374,75 @@ iscsi_iser_conn_start(struct iscsi_cls_conn *cls_conn) return iscsi_conn_start(cls_conn); } -static struct iscsi_transport iscsi_iser_transport; +static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session) +{ + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); + + iscsi_host_remove(shost); + iscsi_host_free(shost); +} static struct iscsi_cls_session * -iscsi_iser_session_create(struct iscsi_transport *iscsit, - struct scsi_transport_template *scsit, - uint16_t cmds_max, uint16_t qdepth, - uint32_t initial_cmdsn, uint32_t *hostno) +iscsi_iser_session_create(struct iscsi_endpoint *ep, + uint16_t cmds_max, uint16_t qdepth, + uint32_t initial_cmdsn, uint32_t *hostno) { struct iscsi_cls_session *cls_session; struct iscsi_session *session; + struct Scsi_Host *shost; int i; - uint32_t hn; - struct iscsi_cmd_task *ctask; - struct iscsi_mgmt_task *mtask; - struct iscsi_iser_cmd_task *iser_ctask; - struct iser_desc *desc; + struct iscsi_task *task; + struct iscsi_iser_task *iser_task; + struct iser_conn *ib_conn; + + shost = iscsi_host_alloc(&iscsi_iser_sht, 0, ISCSI_MAX_CMD_PER_LUN); + if (!shost) + return NULL; + shost->transportt = iscsi_iser_scsi_transport; + shost->max_lun = iscsi_max_lun; + shost->max_id = 0; + shost->max_channel = 0; + shost->max_cmd_len = 16; + + /* + * older userspace tools (before 2.0-870) did not pass us + * the leading conn's ep so this will be NULL; + */ + if (ep) + ib_conn = ep->dd_data; + + if (iscsi_host_add(shost, + ep ? ib_conn->device->ib_device->dma_device : NULL)) + goto free_host; + *hostno = shost->host_no; /* * we do not support setting can_queue cmd_per_lun from userspace yet * because we preallocate so many resources */ - cls_session = iscsi_session_setup(iscsit, scsit, + cls_session = iscsi_session_setup(&iscsi_iser_transport, shost, ISCSI_DEF_XMIT_CMDS_MAX, - ISCSI_MAX_CMD_PER_LUN, - sizeof(struct iscsi_iser_cmd_task), - sizeof(struct iser_desc), - initial_cmdsn, &hn); + sizeof(struct iscsi_iser_task), + initial_cmdsn, 0); if (!cls_session) - return NULL; - - *hostno = hn; - session = class_to_transport_session(cls_session); + goto remove_host; + session = cls_session->dd_data; + shost->can_queue = session->scsi_cmds_max; /* libiscsi setup itts, data and pool so just set desc fields */ for (i = 0; i < session->cmds_max; i++) { - ctask = session->cmds[i]; - iser_ctask = ctask->dd_data; - ctask->hdr = (struct iscsi_cmd *)&iser_ctask->desc.iscsi_header; - ctask->hdr_max = sizeof(iser_ctask->desc.iscsi_header); - } - - for (i = 0; i < session->mgmtpool_max; i++) { - mtask = session->mgmt_cmds[i]; - desc = mtask->dd_data; - mtask->hdr = &desc->iscsi_header; - desc->data = mtask->data; + task = session->cmds[i]; + iser_task = task->dd_data; + task->hdr = (struct iscsi_cmd *)&iser_task->desc.iscsi_header; + task->hdr_max = sizeof(iser_task->desc.iscsi_header); } - return cls_session; + +remove_host: + iscsi_host_remove(shost); +free_host: + iscsi_host_free(shost); + return NULL; } static int @@ -481,34 +515,37 @@ iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *s stats->custom[3].value = conn->fmr_unalign_cnt; } -static int -iscsi_iser_ep_connect(struct sockaddr *dst_addr, int non_blocking, - __u64 *ep_handle) +static struct iscsi_endpoint * +iscsi_iser_ep_connect(struct sockaddr *dst_addr, int non_blocking) { int err; struct iser_conn *ib_conn; + struct iscsi_endpoint *ep; - err = iser_conn_init(&ib_conn); - if (err) - goto out; + ep = iscsi_create_endpoint(sizeof(*ib_conn)); + if (!ep) + return ERR_PTR(-ENOMEM); - err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, non_blocking); - if (!err) - *ep_handle = (__u64)(unsigned long)ib_conn; + ib_conn = ep->dd_data; + ib_conn->ep = ep; + iser_conn_init(ib_conn); -out: - return err; + err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, + non_blocking); + if (err) { + iscsi_destroy_endpoint(ep); + return ERR_PTR(err); + } + return ep; } static int -iscsi_iser_ep_poll(__u64 ep_handle, int timeout_ms) +iscsi_iser_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) { - struct iser_conn *ib_conn = iscsi_iser_ib_conn_lookup(ep_handle); + struct iser_conn *ib_conn; int rc; - if (!ib_conn) - return -EINVAL; - + ib_conn = ep->dd_data; rc = wait_event_interruptible_timeout(ib_conn->wait, ib_conn->state == ISER_CONN_UP, msecs_to_jiffies(timeout_ms)); @@ -530,13 +567,21 @@ iscsi_iser_ep_poll(__u64 ep_handle, int timeout_ms) } static void -iscsi_iser_ep_disconnect(__u64 ep_handle) +iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep) { struct iser_conn *ib_conn; - ib_conn = iscsi_iser_ib_conn_lookup(ep_handle); - if (!ib_conn) - return; + ib_conn = ep->dd_data; + if (ib_conn->iser_conn) + /* + * Must suspend xmit path if the ep is bound to the + * iscsi_conn, so we know we are not accessing the ib_conn + * when we free it. + * + * This may not be bound if the ep poll failed. + */ + iscsi_suspend_tx(ib_conn->iser_conn->iscsi_conn); + iser_err("ib conn %p state %d\n",ib_conn, ib_conn->state); iser_conn_terminate(ib_conn); @@ -547,7 +592,6 @@ static struct scsi_host_template iscsi_iser_sht = { .name = "iSCSI Initiator over iSER, v." DRV_VER, .queuecommand = iscsi_queuecommand, .change_queue_depth = iscsi_change_queue_depth, - .can_queue = ISCSI_DEF_XMIT_CMDS_MAX - 1, .sg_tablesize = ISCSI_ISER_SG_TABLESIZE, .max_sectors = 1024, .cmd_per_lun = ISCSI_MAX_CMD_PER_LUN, @@ -581,17 +625,14 @@ static struct iscsi_transport iscsi_iser_transport = { ISCSI_USERNAME | ISCSI_PASSWORD | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | - ISCSI_PING_TMO | ISCSI_RECV_TMO, + ISCSI_PING_TMO | ISCSI_RECV_TMO | + ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME | ISCSI_HOST_INITIATOR_NAME, - .host_template = &iscsi_iser_sht, - .conndata_size = sizeof(struct iscsi_conn), - .max_lun = ISCSI_ISER_MAX_LUN, - .max_cmd_len = ISCSI_ISER_MAX_CMD_LEN, /* session management */ .create_session = iscsi_iser_session_create, - .destroy_session = iscsi_session_teardown, + .destroy_session = iscsi_iser_session_destroy, /* connection management */ .create_conn = iscsi_iser_conn_create, .bind_conn = iscsi_iser_conn_bind, @@ -600,17 +641,16 @@ static struct iscsi_transport iscsi_iser_transport = { .get_conn_param = iscsi_conn_get_param, .get_session_param = iscsi_session_get_param, .start_conn = iscsi_iser_conn_start, - .stop_conn = iscsi_conn_stop, + .stop_conn = iscsi_iser_conn_stop, /* iscsi host params */ .get_host_param = iscsi_host_get_param, .set_host_param = iscsi_host_set_param, /* IO */ .send_pdu = iscsi_conn_send_pdu, .get_stats = iscsi_iser_conn_get_stats, - .init_cmd_task = iscsi_iser_cmd_init, - .xmit_cmd_task = iscsi_iser_ctask_xmit, - .xmit_mgmt_task = iscsi_iser_mtask_xmit, - .cleanup_cmd_task = iscsi_iser_cleanup_ctask, + .init_task = iscsi_iser_task_init, + .xmit_task = iscsi_iser_task_xmit, + .cleanup_task = iscsi_iser_cleanup_task, /* recovery */ .session_recovery_timedout = iscsi_session_recovery_timedout, @@ -630,8 +670,6 @@ static int __init iser_init(void) return -EINVAL; } - iscsi_iser_transport.max_lun = iscsi_max_lun; - memset(&ig, 0, sizeof(struct iser_global)); ig.desc_cache = kmem_cache_create("iser_descriptors", @@ -647,7 +685,9 @@ static int __init iser_init(void) mutex_init(&ig.connlist_mutex); INIT_LIST_HEAD(&ig.connlist); - if (!iscsi_register_transport(&iscsi_iser_transport)) { + iscsi_iser_scsi_transport = iscsi_register_transport( + &iscsi_iser_transport); + if (!iscsi_iser_scsi_transport) { iser_err("iscsi_register_transport failed\n"); err = -EINVAL; goto register_transport_failure; diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index 0e10703..81a8262 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -94,7 +94,6 @@ /* support upto 512KB in one RDMA */ #define ISCSI_ISER_SG_TABLESIZE (0x80000 >> SHIFT_4K) #define ISCSI_ISER_MAX_LUN 256 -#define ISCSI_ISER_MAX_CMD_LEN 16 /* QP settings */ /* Maximal bounds on received asynchronous PDUs */ @@ -172,7 +171,8 @@ struct iser_data_buf { /* fwd declarations */ struct iser_device; struct iscsi_iser_conn; -struct iscsi_iser_cmd_task; +struct iscsi_iser_task; +struct iscsi_endpoint; struct iser_mem_reg { u32 lkey; @@ -196,7 +196,7 @@ struct iser_regd_buf { #define MAX_REGD_BUF_VECTOR_LEN 2 struct iser_dto { - struct iscsi_iser_cmd_task *ctask; + struct iscsi_iser_task *task; struct iser_conn *ib_conn; int notify_enable; @@ -240,7 +240,9 @@ struct iser_device { struct iser_conn { struct iscsi_iser_conn *iser_conn; /* iser conn for upcalls */ + struct iscsi_endpoint *ep; enum iser_ib_conn_state state; /* rdma connection state */ + atomic_t refcount; spinlock_t lock; /* used for state changes */ struct iser_device *device; /* device context */ struct rdma_cm_id *cma_id; /* CMA ID */ @@ -259,11 +261,9 @@ struct iser_conn { struct iscsi_iser_conn { struct iscsi_conn *iscsi_conn;/* ptr to iscsi conn */ struct iser_conn *ib_conn; /* iSER IB conn */ - - rwlock_t lock; }; -struct iscsi_iser_cmd_task { +struct iscsi_iser_task { struct iser_desc desc; struct iscsi_iser_conn *iser_conn; enum iser_task_status status; @@ -296,22 +296,26 @@ extern int iser_debug_level; /* allocate connection resources needed for rdma functionality */ int iser_conn_set_full_featured_mode(struct iscsi_conn *conn); -int iser_send_control(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask); +int iser_send_control(struct iscsi_conn *conn, + struct iscsi_task *task); -int iser_send_command(struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask); +int iser_send_command(struct iscsi_conn *conn, + struct iscsi_task *task); -int iser_send_data_out(struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask, - struct iscsi_data *hdr); +int iser_send_data_out(struct iscsi_conn *conn, + struct iscsi_task *task, + struct iscsi_data *hdr); void iscsi_iser_recv(struct iscsi_conn *conn, struct iscsi_hdr *hdr, char *rx_data, int rx_data_len); -int iser_conn_init(struct iser_conn **ib_conn); +void iser_conn_init(struct iser_conn *ib_conn); + +void iser_conn_get(struct iser_conn *ib_conn); + +void iser_conn_put(struct iser_conn *ib_conn); void iser_conn_terminate(struct iser_conn *ib_conn); @@ -320,9 +324,9 @@ void iser_rcv_completion(struct iser_desc *desc, void iser_snd_completion(struct iser_desc *desc); -void iser_ctask_rdma_init(struct iscsi_iser_cmd_task *ctask); +void iser_task_rdma_init(struct iscsi_iser_task *task); -void iser_ctask_rdma_finalize(struct iscsi_iser_cmd_task *ctask); +void iser_task_rdma_finalize(struct iscsi_iser_task *task); void iser_dto_buffs_release(struct iser_dto *dto); @@ -332,10 +336,10 @@ void iser_reg_single(struct iser_device *device, struct iser_regd_buf *regd_buf, enum dma_data_direction direction); -void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *ctask, +void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *task, enum iser_data_dir cmd_dir); -int iser_reg_rdma_mem(struct iscsi_iser_cmd_task *ctask, +int iser_reg_rdma_mem(struct iscsi_iser_task *task, enum iser_data_dir cmd_dir); int iser_connect(struct iser_conn *ib_conn, @@ -355,10 +359,10 @@ int iser_post_send(struct iser_desc *tx_desc); int iser_conn_state_comp(struct iser_conn *ib_conn, enum iser_ib_conn_state comp); -int iser_dma_map_task_data(struct iscsi_iser_cmd_task *iser_ctask, +int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, struct iser_data_buf *data, enum iser_data_dir iser_dir, enum dma_data_direction dma_dir); -void iser_dma_unmap_task_data(struct iscsi_iser_cmd_task *iser_ctask); +void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task); #endif diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c index 31ad498..cdd2831 100644 --- a/drivers/infiniband/ulp/iser/iser_initiator.c +++ b/drivers/infiniband/ulp/iser/iser_initiator.c @@ -64,46 +64,46 @@ static void iser_dto_add_regd_buff(struct iser_dto *dto, /* Register user buffer memory and initialize passive rdma * dto descriptor. Total data size is stored in - * iser_ctask->data[ISER_DIR_IN].data_len + * iser_task->data[ISER_DIR_IN].data_len */ -static int iser_prepare_read_cmd(struct iscsi_cmd_task *ctask, +static int iser_prepare_read_cmd(struct iscsi_task *task, unsigned int edtl) { - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; struct iser_regd_buf *regd_buf; int err; - struct iser_hdr *hdr = &iser_ctask->desc.iser_header; - struct iser_data_buf *buf_in = &iser_ctask->data[ISER_DIR_IN]; + struct iser_hdr *hdr = &iser_task->desc.iser_header; + struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN]; - err = iser_dma_map_task_data(iser_ctask, + err = iser_dma_map_task_data(iser_task, buf_in, ISER_DIR_IN, DMA_FROM_DEVICE); if (err) return err; - if (edtl > iser_ctask->data[ISER_DIR_IN].data_len) { + if (edtl > iser_task->data[ISER_DIR_IN].data_len) { iser_err("Total data length: %ld, less than EDTL: " "%d, in READ cmd BHS itt: %d, conn: 0x%p\n", - iser_ctask->data[ISER_DIR_IN].data_len, edtl, - ctask->itt, iser_ctask->iser_conn); + iser_task->data[ISER_DIR_IN].data_len, edtl, + task->itt, iser_task->iser_conn); return -EINVAL; } - err = iser_reg_rdma_mem(iser_ctask,ISER_DIR_IN); + err = iser_reg_rdma_mem(iser_task,ISER_DIR_IN); if (err) { iser_err("Failed to set up Data-IN RDMA\n"); return err; } - regd_buf = &iser_ctask->rdma_regd[ISER_DIR_IN]; + regd_buf = &iser_task->rdma_regd[ISER_DIR_IN]; hdr->flags |= ISER_RSV; hdr->read_stag = cpu_to_be32(regd_buf->reg.rkey); hdr->read_va = cpu_to_be64(regd_buf->reg.va); iser_dbg("Cmd itt:%d READ tags RKEY:%#.4X VA:%#llX\n", - ctask->itt, regd_buf->reg.rkey, + task->itt, regd_buf->reg.rkey, (unsigned long long)regd_buf->reg.va); return 0; @@ -111,43 +111,43 @@ static int iser_prepare_read_cmd(struct iscsi_cmd_task *ctask, /* Register user buffer memory and initialize passive rdma * dto descriptor. Total data size is stored in - * ctask->data[ISER_DIR_OUT].data_len + * task->data[ISER_DIR_OUT].data_len */ static int -iser_prepare_write_cmd(struct iscsi_cmd_task *ctask, +iser_prepare_write_cmd(struct iscsi_task *task, unsigned int imm_sz, unsigned int unsol_sz, unsigned int edtl) { - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; struct iser_regd_buf *regd_buf; int err; - struct iser_dto *send_dto = &iser_ctask->desc.dto; - struct iser_hdr *hdr = &iser_ctask->desc.iser_header; - struct iser_data_buf *buf_out = &iser_ctask->data[ISER_DIR_OUT]; + struct iser_dto *send_dto = &iser_task->desc.dto; + struct iser_hdr *hdr = &iser_task->desc.iser_header; + struct iser_data_buf *buf_out = &iser_task->data[ISER_DIR_OUT]; - err = iser_dma_map_task_data(iser_ctask, + err = iser_dma_map_task_data(iser_task, buf_out, ISER_DIR_OUT, DMA_TO_DEVICE); if (err) return err; - if (edtl > iser_ctask->data[ISER_DIR_OUT].data_len) { + if (edtl > iser_task->data[ISER_DIR_OUT].data_len) { iser_err("Total data length: %ld, less than EDTL: %d, " "in WRITE cmd BHS itt: %d, conn: 0x%p\n", - iser_ctask->data[ISER_DIR_OUT].data_len, - edtl, ctask->itt, ctask->conn); + iser_task->data[ISER_DIR_OUT].data_len, + edtl, task->itt, task->conn); return -EINVAL; } - err = iser_reg_rdma_mem(iser_ctask,ISER_DIR_OUT); + err = iser_reg_rdma_mem(iser_task,ISER_DIR_OUT); if (err != 0) { iser_err("Failed to register write cmd RDMA mem\n"); return err; } - regd_buf = &iser_ctask->rdma_regd[ISER_DIR_OUT]; + regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT]; if (unsol_sz < edtl) { hdr->flags |= ISER_WSV; @@ -156,13 +156,13 @@ iser_prepare_write_cmd(struct iscsi_cmd_task *ctask, iser_dbg("Cmd itt:%d, WRITE tags, RKEY:%#.4X " "VA:%#llX + unsol:%d\n", - ctask->itt, regd_buf->reg.rkey, + task->itt, regd_buf->reg.rkey, (unsigned long long)regd_buf->reg.va, unsol_sz); } if (imm_sz > 0) { iser_dbg("Cmd itt:%d, WRITE, adding imm.data sz: %d\n", - ctask->itt, imm_sz); + task->itt, imm_sz); iser_dto_add_regd_buff(send_dto, regd_buf, 0, @@ -314,38 +314,38 @@ iser_check_xmit(struct iscsi_conn *conn, void *task) /** * iser_send_command - send command PDU */ -int iser_send_command(struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask) +int iser_send_command(struct iscsi_conn *conn, + struct iscsi_task *task) { struct iscsi_iser_conn *iser_conn = conn->dd_data; - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; struct iser_dto *send_dto = NULL; unsigned long edtl; int err = 0; struct iser_data_buf *data_buf; - struct iscsi_cmd *hdr = ctask->hdr; - struct scsi_cmnd *sc = ctask->sc; + struct iscsi_cmd *hdr = task->hdr; + struct scsi_cmnd *sc = task->sc; if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) { iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn); return -EPERM; } - if (iser_check_xmit(conn, ctask)) + if (iser_check_xmit(conn, task)) return -ENOBUFS; edtl = ntohl(hdr->data_length); /* build the tx desc regd header and add it to the tx desc dto */ - iser_ctask->desc.type = ISCSI_TX_SCSI_COMMAND; - send_dto = &iser_ctask->desc.dto; - send_dto->ctask = iser_ctask; - iser_create_send_desc(iser_conn, &iser_ctask->desc); + iser_task->desc.type = ISCSI_TX_SCSI_COMMAND; + send_dto = &iser_task->desc.dto; + send_dto->task = iser_task; + iser_create_send_desc(iser_conn, &iser_task->desc); if (hdr->flags & ISCSI_FLAG_CMD_READ) - data_buf = &iser_ctask->data[ISER_DIR_IN]; + data_buf = &iser_task->data[ISER_DIR_IN]; else - data_buf = &iser_ctask->data[ISER_DIR_OUT]; + data_buf = &iser_task->data[ISER_DIR_OUT]; if (scsi_sg_count(sc)) { /* using a scatter list */ data_buf->buf = scsi_sglist(sc); @@ -355,15 +355,15 @@ int iser_send_command(struct iscsi_conn *conn, data_buf->data_len = scsi_bufflen(sc); if (hdr->flags & ISCSI_FLAG_CMD_READ) { - err = iser_prepare_read_cmd(ctask, edtl); + err = iser_prepare_read_cmd(task, edtl); if (err) goto send_command_error; } if (hdr->flags & ISCSI_FLAG_CMD_WRITE) { - err = iser_prepare_write_cmd(ctask, - ctask->imm_count, - ctask->imm_count + - ctask->unsol_count, + err = iser_prepare_write_cmd(task, + task->imm_count, + task->imm_count + + task->unsol_count, edtl); if (err) goto send_command_error; @@ -378,27 +378,27 @@ int iser_send_command(struct iscsi_conn *conn, goto send_command_error; } - iser_ctask->status = ISER_TASK_STATUS_STARTED; + iser_task->status = ISER_TASK_STATUS_STARTED; - err = iser_post_send(&iser_ctask->desc); + err = iser_post_send(&iser_task->desc); if (!err) return 0; send_command_error: iser_dto_buffs_release(send_dto); - iser_err("conn %p failed ctask->itt %d err %d\n",conn, ctask->itt, err); + iser_err("conn %p failed task->itt %d err %d\n",conn, task->itt, err); return err; } /** * iser_send_data_out - send data out PDU */ -int iser_send_data_out(struct iscsi_conn *conn, - struct iscsi_cmd_task *ctask, +int iser_send_data_out(struct iscsi_conn *conn, + struct iscsi_task *task, struct iscsi_data *hdr) { struct iscsi_iser_conn *iser_conn = conn->dd_data; - struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; struct iser_desc *tx_desc = NULL; struct iser_dto *send_dto = NULL; unsigned long buf_offset; @@ -411,7 +411,7 @@ int iser_send_data_out(struct iscsi_conn *conn, return -EPERM; } - if (iser_check_xmit(conn, ctask)) + if (iser_check_xmit(conn, task)) return -ENOBUFS; itt = (__force uint32_t)hdr->itt; @@ -432,7 +432,7 @@ int iser_send_data_out(struct iscsi_conn *conn, /* build the tx desc regd header and add it to the tx desc dto */ send_dto = &tx_desc->dto; - send_dto->ctask = iser_ctask; + send_dto->task = iser_task; iser_create_send_desc(iser_conn, tx_desc); iser_reg_single(iser_conn->ib_conn->device, @@ -440,15 +440,15 @@ int iser_send_data_out(struct iscsi_conn *conn, /* all data was registered for RDMA, we can use the lkey */ iser_dto_add_regd_buff(send_dto, - &iser_ctask->rdma_regd[ISER_DIR_OUT], + &iser_task->rdma_regd[ISER_DIR_OUT], buf_offset, data_seg_len); - if (buf_offset + data_seg_len > iser_ctask->data[ISER_DIR_OUT].data_len) { + if (buf_offset + data_seg_len > iser_task->data[ISER_DIR_OUT].data_len) { iser_err("Offset:%ld & DSL:%ld in Data-Out " "inconsistent with total len:%ld, itt:%d\n", buf_offset, data_seg_len, - iser_ctask->data[ISER_DIR_OUT].data_len, itt); + iser_task->data[ISER_DIR_OUT].data_len, itt); err = -EINVAL; goto send_data_out_error; } @@ -468,10 +468,11 @@ send_data_out_error: } int iser_send_control(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask) + struct iscsi_task *task) { struct iscsi_iser_conn *iser_conn = conn->dd_data; - struct iser_desc *mdesc = mtask->dd_data; + struct iscsi_iser_task *iser_task = task->dd_data; + struct iser_desc *mdesc = &iser_task->desc; struct iser_dto *send_dto = NULL; unsigned long data_seg_len; int err = 0; @@ -483,27 +484,27 @@ int iser_send_control(struct iscsi_conn *conn, return -EPERM; } - if (iser_check_xmit(conn,mtask)) + if (iser_check_xmit(conn, task)) return -ENOBUFS; /* build the tx desc regd header and add it to the tx desc dto */ mdesc->type = ISCSI_TX_CONTROL; send_dto = &mdesc->dto; - send_dto->ctask = NULL; + send_dto->task = NULL; iser_create_send_desc(iser_conn, mdesc); device = iser_conn->ib_conn->device; iser_reg_single(device, send_dto->regd[0], DMA_TO_DEVICE); - data_seg_len = ntoh24(mtask->hdr->dlength); + data_seg_len = ntoh24(task->hdr->dlength); if (data_seg_len > 0) { regd_buf = &mdesc->data_regd_buf; memset(regd_buf, 0, sizeof(struct iser_regd_buf)); regd_buf->device = device; - regd_buf->virt_addr = mtask->data; - regd_buf->data_size = mtask->data_count; + regd_buf->virt_addr = task->data; + regd_buf->data_size = task->data_count; iser_reg_single(device, regd_buf, DMA_TO_DEVICE); iser_dto_add_regd_buff(send_dto, regd_buf, @@ -533,15 +534,13 @@ send_control_error: void iser_rcv_completion(struct iser_desc *rx_desc, unsigned long dto_xfer_len) { - struct iser_dto *dto = &rx_desc->dto; + struct iser_dto *dto = &rx_desc->dto; struct iscsi_iser_conn *conn = dto->ib_conn->iser_conn; - struct iscsi_session *session = conn->iscsi_conn->session; - struct iscsi_cmd_task *ctask; - struct iscsi_iser_cmd_task *iser_ctask; + struct iscsi_task *task; + struct iscsi_iser_task *iser_task; struct iscsi_hdr *hdr; char *rx_data = NULL; int rx_data_len = 0; - unsigned int itt; unsigned char opcode; hdr = &rx_desc->iscsi_header; @@ -557,19 +556,24 @@ void iser_rcv_completion(struct iser_desc *rx_desc, opcode = hdr->opcode & ISCSI_OPCODE_MASK; if (opcode == ISCSI_OP_SCSI_CMD_RSP) { - itt = get_itt(hdr->itt); /* mask out cid and age bits */ - if (!(itt < session->cmds_max)) + spin_lock(&conn->iscsi_conn->session->lock); + task = iscsi_itt_to_ctask(conn->iscsi_conn, hdr->itt); + if (task) + __iscsi_get_task(task); + spin_unlock(&conn->iscsi_conn->session->lock); + + if (!task) iser_err("itt can't be matched to task!!! " - "conn %p opcode %d cmds_max %d itt %d\n", - conn->iscsi_conn,opcode,session->cmds_max,itt); - /* use the mapping given with the cmds array indexed by itt */ - ctask = (struct iscsi_cmd_task *)session->cmds[itt]; - iser_ctask = ctask->dd_data; - iser_dbg("itt %d ctask %p\n",itt,ctask); - iser_ctask->status = ISER_TASK_STATUS_COMPLETED; - iser_ctask_rdma_finalize(iser_ctask); + "conn %p opcode %d itt %d\n", + conn->iscsi_conn, opcode, hdr->itt); + else { + iser_task = task->dd_data; + iser_dbg("itt %d task %p\n",hdr->itt, task); + iser_task->status = ISER_TASK_STATUS_COMPLETED; + iser_task_rdma_finalize(iser_task); + iscsi_put_task(task); + } } - iser_dto_buffs_release(dto); iscsi_iser_recv(conn->iscsi_conn, hdr, rx_data, rx_data_len); @@ -590,7 +594,7 @@ void iser_snd_completion(struct iser_desc *tx_desc) struct iser_conn *ib_conn = dto->ib_conn; struct iscsi_iser_conn *iser_conn = ib_conn->iser_conn; struct iscsi_conn *conn = iser_conn->iscsi_conn; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; int resume_tx = 0; iser_dbg("Initiator, Data sent dto=0x%p\n", dto); @@ -613,36 +617,31 @@ void iser_snd_completion(struct iser_desc *tx_desc) if (tx_desc->type == ISCSI_TX_CONTROL) { /* this arithmetic is legal by libiscsi dd_data allocation */ - mtask = (void *) ((long)(void *)tx_desc - - sizeof(struct iscsi_mgmt_task)); - if (mtask->hdr->itt == RESERVED_ITT) { - struct iscsi_session *session = conn->session; - - spin_lock(&conn->session->lock); - iscsi_free_mgmt_task(conn, mtask); - spin_unlock(&session->lock); - } + task = (void *) ((long)(void *)tx_desc - + sizeof(struct iscsi_task)); + if (task->hdr->itt == RESERVED_ITT) + iscsi_put_task(task); } } -void iser_ctask_rdma_init(struct iscsi_iser_cmd_task *iser_ctask) +void iser_task_rdma_init(struct iscsi_iser_task *iser_task) { - iser_ctask->status = ISER_TASK_STATUS_INIT; + iser_task->status = ISER_TASK_STATUS_INIT; - iser_ctask->dir[ISER_DIR_IN] = 0; - iser_ctask->dir[ISER_DIR_OUT] = 0; + iser_task->dir[ISER_DIR_IN] = 0; + iser_task->dir[ISER_DIR_OUT] = 0; - iser_ctask->data[ISER_DIR_IN].data_len = 0; - iser_ctask->data[ISER_DIR_OUT].data_len = 0; + iser_task->data[ISER_DIR_IN].data_len = 0; + iser_task->data[ISER_DIR_OUT].data_len = 0; - memset(&iser_ctask->rdma_regd[ISER_DIR_IN], 0, + memset(&iser_task->rdma_regd[ISER_DIR_IN], 0, sizeof(struct iser_regd_buf)); - memset(&iser_ctask->rdma_regd[ISER_DIR_OUT], 0, + memset(&iser_task->rdma_regd[ISER_DIR_OUT], 0, sizeof(struct iser_regd_buf)); } -void iser_ctask_rdma_finalize(struct iscsi_iser_cmd_task *iser_ctask) +void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task) { int deferred; int is_rdma_aligned = 1; @@ -651,17 +650,17 @@ void iser_ctask_rdma_finalize(struct iscsi_iser_cmd_task *iser_ctask) /* if we were reading, copy back to unaligned sglist, * anyway dma_unmap and free the copy */ - if (iser_ctask->data_copy[ISER_DIR_IN].copy_buf != NULL) { + if (iser_task->data_copy[ISER_DIR_IN].copy_buf != NULL) { is_rdma_aligned = 0; - iser_finalize_rdma_unaligned_sg(iser_ctask, ISER_DIR_IN); + iser_finalize_rdma_unaligned_sg(iser_task, ISER_DIR_IN); } - if (iser_ctask->data_copy[ISER_DIR_OUT].copy_buf != NULL) { + if (iser_task->data_copy[ISER_DIR_OUT].copy_buf != NULL) { is_rdma_aligned = 0; - iser_finalize_rdma_unaligned_sg(iser_ctask, ISER_DIR_OUT); + iser_finalize_rdma_unaligned_sg(iser_task, ISER_DIR_OUT); } - if (iser_ctask->dir[ISER_DIR_IN]) { - regd = &iser_ctask->rdma_regd[ISER_DIR_IN]; + if (iser_task->dir[ISER_DIR_IN]) { + regd = &iser_task->rdma_regd[ISER_DIR_IN]; deferred = iser_regd_buff_release(regd); if (deferred) { iser_err("%d references remain for BUF-IN rdma reg\n", @@ -669,8 +668,8 @@ void iser_ctask_rdma_finalize(struct iscsi_iser_cmd_task *iser_ctask) } } - if (iser_ctask->dir[ISER_DIR_OUT]) { - regd = &iser_ctask->rdma_regd[ISER_DIR_OUT]; + if (iser_task->dir[ISER_DIR_OUT]) { + regd = &iser_task->rdma_regd[ISER_DIR_OUT]; deferred = iser_regd_buff_release(regd); if (deferred) { iser_err("%d references remain for BUF-OUT rdma reg\n", @@ -680,7 +679,7 @@ void iser_ctask_rdma_finalize(struct iscsi_iser_cmd_task *iser_ctask) /* if the data was unaligned, it was already unmapped and then copied */ if (is_rdma_aligned) - iser_dma_unmap_task_data(iser_ctask); + iser_dma_unmap_task_data(iser_task); } void iser_dto_buffs_release(struct iser_dto *dto) diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c index 81e49cb..b9453d0 100644 --- a/drivers/infiniband/ulp/iser/iser_memory.c +++ b/drivers/infiniband/ulp/iser/iser_memory.c @@ -99,13 +99,13 @@ void iser_reg_single(struct iser_device *device, /** * iser_start_rdma_unaligned_sg */ -static int iser_start_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, +static int iser_start_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, enum iser_data_dir cmd_dir) { int dma_nents; struct ib_device *dev; char *mem = NULL; - struct iser_data_buf *data = &iser_ctask->data[cmd_dir]; + struct iser_data_buf *data = &iser_task->data[cmd_dir]; unsigned long cmd_data_len = data->data_len; if (cmd_data_len > ISER_KMALLOC_THRESHOLD) @@ -138,37 +138,37 @@ static int iser_start_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, } } - sg_init_one(&iser_ctask->data_copy[cmd_dir].sg_single, mem, cmd_data_len); - iser_ctask->data_copy[cmd_dir].buf = - &iser_ctask->data_copy[cmd_dir].sg_single; - iser_ctask->data_copy[cmd_dir].size = 1; + sg_init_one(&iser_task->data_copy[cmd_dir].sg_single, mem, cmd_data_len); + iser_task->data_copy[cmd_dir].buf = + &iser_task->data_copy[cmd_dir].sg_single; + iser_task->data_copy[cmd_dir].size = 1; - iser_ctask->data_copy[cmd_dir].copy_buf = mem; + iser_task->data_copy[cmd_dir].copy_buf = mem; - dev = iser_ctask->iser_conn->ib_conn->device->ib_device; + dev = iser_task->iser_conn->ib_conn->device->ib_device; dma_nents = ib_dma_map_sg(dev, - &iser_ctask->data_copy[cmd_dir].sg_single, + &iser_task->data_copy[cmd_dir].sg_single, 1, (cmd_dir == ISER_DIR_OUT) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); BUG_ON(dma_nents == 0); - iser_ctask->data_copy[cmd_dir].dma_nents = dma_nents; + iser_task->data_copy[cmd_dir].dma_nents = dma_nents; return 0; } /** * iser_finalize_rdma_unaligned_sg */ -void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, +void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, enum iser_data_dir cmd_dir) { struct ib_device *dev; struct iser_data_buf *mem_copy; unsigned long cmd_data_len; - dev = iser_ctask->iser_conn->ib_conn->device->ib_device; - mem_copy = &iser_ctask->data_copy[cmd_dir]; + dev = iser_task->iser_conn->ib_conn->device->ib_device; + mem_copy = &iser_task->data_copy[cmd_dir]; ib_dma_unmap_sg(dev, &mem_copy->sg_single, 1, (cmd_dir == ISER_DIR_OUT) ? @@ -184,8 +184,8 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, /* copy back read RDMA to unaligned sg */ mem = mem_copy->copy_buf; - sgl = (struct scatterlist *)iser_ctask->data[ISER_DIR_IN].buf; - sg_size = iser_ctask->data[ISER_DIR_IN].size; + sgl = (struct scatterlist *)iser_task->data[ISER_DIR_IN].buf; + sg_size = iser_task->data[ISER_DIR_IN].size; p = mem; for_each_sg(sgl, sg, sg_size, i) { @@ -198,7 +198,7 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, } } - cmd_data_len = iser_ctask->data[cmd_dir].data_len; + cmd_data_len = iser_task->data[cmd_dir].data_len; if (cmd_data_len > ISER_KMALLOC_THRESHOLD) free_pages((unsigned long)mem_copy->copy_buf, @@ -376,15 +376,15 @@ static void iser_page_vec_build(struct iser_data_buf *data, } } -int iser_dma_map_task_data(struct iscsi_iser_cmd_task *iser_ctask, - struct iser_data_buf *data, - enum iser_data_dir iser_dir, - enum dma_data_direction dma_dir) +int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, + struct iser_data_buf *data, + enum iser_data_dir iser_dir, + enum dma_data_direction dma_dir) { struct ib_device *dev; - iser_ctask->dir[iser_dir] = 1; - dev = iser_ctask->iser_conn->ib_conn->device->ib_device; + iser_task->dir[iser_dir] = 1; + dev = iser_task->iser_conn->ib_conn->device->ib_device; data->dma_nents = ib_dma_map_sg(dev, data->buf, data->size, dma_dir); if (data->dma_nents == 0) { @@ -394,20 +394,20 @@ int iser_dma_map_task_data(struct iscsi_iser_cmd_task *iser_ctask, return 0; } -void iser_dma_unmap_task_data(struct iscsi_iser_cmd_task *iser_ctask) +void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task) { struct ib_device *dev; struct iser_data_buf *data; - dev = iser_ctask->iser_conn->ib_conn->device->ib_device; + dev = iser_task->iser_conn->ib_conn->device->ib_device; - if (iser_ctask->dir[ISER_DIR_IN]) { - data = &iser_ctask->data[ISER_DIR_IN]; + if (iser_task->dir[ISER_DIR_IN]) { + data = &iser_task->data[ISER_DIR_IN]; ib_dma_unmap_sg(dev, data->buf, data->size, DMA_FROM_DEVICE); } - if (iser_ctask->dir[ISER_DIR_OUT]) { - data = &iser_ctask->data[ISER_DIR_OUT]; + if (iser_task->dir[ISER_DIR_OUT]) { + data = &iser_task->data[ISER_DIR_OUT]; ib_dma_unmap_sg(dev, data->buf, data->size, DMA_TO_DEVICE); } } @@ -418,21 +418,21 @@ void iser_dma_unmap_task_data(struct iscsi_iser_cmd_task *iser_ctask) * * returns 0 on success, errno code on failure */ -int iser_reg_rdma_mem(struct iscsi_iser_cmd_task *iser_ctask, +int iser_reg_rdma_mem(struct iscsi_iser_task *iser_task, enum iser_data_dir cmd_dir) { - struct iscsi_conn *iscsi_conn = iser_ctask->iser_conn->iscsi_conn; - struct iser_conn *ib_conn = iser_ctask->iser_conn->ib_conn; + struct iscsi_conn *iscsi_conn = iser_task->iser_conn->iscsi_conn; + struct iser_conn *ib_conn = iser_task->iser_conn->ib_conn; struct iser_device *device = ib_conn->device; struct ib_device *ibdev = device->ib_device; - struct iser_data_buf *mem = &iser_ctask->data[cmd_dir]; + struct iser_data_buf *mem = &iser_task->data[cmd_dir]; struct iser_regd_buf *regd_buf; int aligned_len; int err; int i; struct scatterlist *sg; - regd_buf = &iser_ctask->rdma_regd[cmd_dir]; + regd_buf = &iser_task->rdma_regd[cmd_dir]; aligned_len = iser_data_buf_aligned_len(mem, ibdev); if (aligned_len != mem->dma_nents) { @@ -442,13 +442,13 @@ int iser_reg_rdma_mem(struct iscsi_iser_cmd_task *iser_ctask, iser_data_buf_dump(mem, ibdev); /* unmap the command data before accessing it */ - iser_dma_unmap_task_data(iser_ctask); + iser_dma_unmap_task_data(iser_task); /* allocate copy buf, if we are writing, copy the */ /* unaligned scatterlist, dma map the copy */ - if (iser_start_rdma_unaligned_sg(iser_ctask, cmd_dir) != 0) + if (iser_start_rdma_unaligned_sg(iser_task, cmd_dir) != 0) return -ENOMEM; - mem = &iser_ctask->data_copy[cmd_dir]; + mem = &iser_task->data_copy[cmd_dir]; } /* if there a single dma entry, FMR is not needed */ @@ -472,8 +472,9 @@ int iser_reg_rdma_mem(struct iscsi_iser_cmd_task *iser_ctask, err = iser_reg_page_vec(ib_conn, ib_conn->page_vec, ®d_buf->reg); if (err) { iser_data_buf_dump(mem, ibdev); - iser_err("mem->dma_nents = %d (dlength = 0x%x)\n", mem->dma_nents, - ntoh24(iser_ctask->desc.iscsi_header.dlength)); + iser_err("mem->dma_nents = %d (dlength = 0x%x)\n", + mem->dma_nents, + ntoh24(iser_task->desc.iscsi_header.dlength)); iser_err("page_vec: data_size = 0x%x, length = %d, offset = 0x%x\n", ib_conn->page_vec->data_size, ib_conn->page_vec->length, ib_conn->page_vec->offset); diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index 77cabee..3a917c1 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -323,7 +323,18 @@ static void iser_conn_release(struct iser_conn *ib_conn) iser_device_try_release(device); if (ib_conn->iser_conn) ib_conn->iser_conn->ib_conn = NULL; - kfree(ib_conn); + iscsi_destroy_endpoint(ib_conn->ep); +} + +void iser_conn_get(struct iser_conn *ib_conn) +{ + atomic_inc(&ib_conn->refcount); +} + +void iser_conn_put(struct iser_conn *ib_conn) +{ + if (atomic_dec_and_test(&ib_conn->refcount)) + iser_conn_release(ib_conn); } /** @@ -347,7 +358,7 @@ void iser_conn_terminate(struct iser_conn *ib_conn) wait_event_interruptible(ib_conn->wait, ib_conn->state == ISER_CONN_DOWN); - iser_conn_release(ib_conn); + iser_conn_put(ib_conn); } static void iser_connect_error(struct rdma_cm_id *cma_id) @@ -481,24 +492,15 @@ static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *eve return ret; } -int iser_conn_init(struct iser_conn **ibconn) +void iser_conn_init(struct iser_conn *ib_conn) { - struct iser_conn *ib_conn; - - ib_conn = kzalloc(sizeof *ib_conn, GFP_KERNEL); - if (!ib_conn) { - iser_err("can't alloc memory for struct iser_conn\n"); - return -ENOMEM; - } ib_conn->state = ISER_CONN_INIT; init_waitqueue_head(&ib_conn->wait); atomic_set(&ib_conn->post_recv_buf_count, 0); atomic_set(&ib_conn->post_send_buf_count, 0); + atomic_set(&ib_conn->refcount, 1); INIT_LIST_HEAD(&ib_conn->conn_list); spin_lock_init(&ib_conn->lock); - - *ibconn = ib_conn; - return 0; } /** diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 610af91..07d92c1 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -252,27 +252,14 @@ config DM_ZERO config DM_MULTIPATH tristate "Multipath target" depends on BLK_DEV_DM + # nasty syntax but means make DM_MULTIPATH independent + # of SCSI_DH if the latter isn't defined but if + # it is, DM_MULTIPATH must depend on it. We get a build + # error if SCSI_DH=m and DM_MULTIPATH=y + depends on SCSI_DH || !SCSI_DH ---help--- Allow volume managers to support multipath hardware. -config DM_MULTIPATH_EMC - tristate "EMC CX/AX multipath support" - depends on DM_MULTIPATH && BLK_DEV_DM - ---help--- - Multipath support for EMC CX/AX series hardware. - -config DM_MULTIPATH_RDAC - tristate "LSI/Engenio RDAC multipath support (EXPERIMENTAL)" - depends on DM_MULTIPATH && BLK_DEV_DM && SCSI && EXPERIMENTAL - ---help--- - Multipath support for LSI/Engenio RDAC. - -config DM_MULTIPATH_HP - tristate "HP MSA multipath support (EXPERIMENTAL)" - depends on DM_MULTIPATH && BLK_DEV_DM && SCSI && EXPERIMENTAL - ---help--- - Multipath support for HP MSA (Active/Passive) series hardware. - config DM_DELAY tristate "I/O delaying target (EXPERIMENTAL)" depends on BLK_DEV_DM && EXPERIMENTAL diff --git a/drivers/md/Makefile b/drivers/md/Makefile index 7be09ee..f1ef33d 100644 --- a/drivers/md/Makefile +++ b/drivers/md/Makefile @@ -4,11 +4,9 @@ dm-mod-objs := dm.o dm-table.o dm-target.o dm-linear.o dm-stripe.o \ dm-ioctl.o dm-io.o dm-kcopyd.o -dm-multipath-objs := dm-hw-handler.o dm-path-selector.o dm-mpath.o +dm-multipath-objs := dm-path-selector.o dm-mpath.o dm-snapshot-objs := dm-snap.o dm-exception-store.o dm-mirror-objs := dm-raid1.o -dm-rdac-objs := dm-mpath-rdac.o -dm-hp-sw-objs := dm-mpath-hp-sw.o md-mod-objs := md.o bitmap.o raid456-objs := raid5.o raid6algos.o raid6recov.o raid6tables.o \ raid6int1.o raid6int2.o raid6int4.o \ @@ -35,9 +33,6 @@ obj-$(CONFIG_BLK_DEV_DM) += dm-mod.o obj-$(CONFIG_DM_CRYPT) += dm-crypt.o obj-$(CONFIG_DM_DELAY) += dm-delay.o obj-$(CONFIG_DM_MULTIPATH) += dm-multipath.o dm-round-robin.o -obj-$(CONFIG_DM_MULTIPATH_EMC) += dm-emc.o -obj-$(CONFIG_DM_MULTIPATH_HP) += dm-hp-sw.o -obj-$(CONFIG_DM_MULTIPATH_RDAC) += dm-rdac.o obj-$(CONFIG_DM_SNAPSHOT) += dm-snapshot.o obj-$(CONFIG_DM_MIRROR) += dm-mirror.o dm-log.o obj-$(CONFIG_DM_ZERO) += dm-zero.o diff --git a/drivers/md/dm-emc.c b/drivers/md/dm-emc.c deleted file mode 100644 index 3ea5ad4..0000000 --- a/drivers/md/dm-emc.c +++ /dev/null @@ -1,345 +0,0 @@ -/* - * Copyright (C) 2004 SUSE LINUX Products GmbH. All rights reserved. - * Copyright (C) 2004 Red Hat, Inc. All rights reserved. - * - * This file is released under the GPL. - * - * Multipath support for EMC CLARiiON AX/CX-series hardware. - */ - -#include "dm.h" -#include "dm-hw-handler.h" -#include <scsi/scsi.h> -#include <scsi/scsi_cmnd.h> - -#define DM_MSG_PREFIX "multipath emc" - -struct emc_handler { - spinlock_t lock; - - /* Whether we should send the short trespass command (FC-series) - * or the long version (default for AX/CX CLARiiON arrays). */ - unsigned short_trespass; - /* Whether or not to honor SCSI reservations when initiating a - * switch-over. Default: Don't. */ - unsigned hr; - - unsigned char sense[SCSI_SENSE_BUFFERSIZE]; -}; - -#define TRESPASS_PAGE 0x22 -#define EMC_FAILOVER_TIMEOUT (60 * HZ) - -/* Code borrowed from dm-lsi-rdac by Mike Christie */ - -static inline void free_bio(struct bio *bio) -{ - __free_page(bio->bi_io_vec[0].bv_page); - bio_put(bio); -} - -static void emc_endio(struct bio *bio, int error) -{ - struct dm_path *path = bio->bi_private; - - /* We also need to look at the sense keys here whether or not to - * switch to the next PG etc. - * - * For now simple logic: either it works or it doesn't. - */ - if (error) - dm_pg_init_complete(path, MP_FAIL_PATH); - else - dm_pg_init_complete(path, 0); - - /* request is freed in block layer */ - free_bio(bio); -} - -static struct bio *get_failover_bio(struct dm_path *path, unsigned data_size) -{ - struct bio *bio; - struct page *page; - - bio = bio_alloc(GFP_ATOMIC, 1); - if (!bio) { - DMERR("get_failover_bio: bio_alloc() failed."); - return NULL; - } - - bio->bi_rw |= (1 << BIO_RW); - bio->bi_bdev = path->dev->bdev; - bio->bi_sector = 0; - bio->bi_private = path; - bio->bi_end_io = emc_endio; - - page = alloc_page(GFP_ATOMIC); - if (!page) { - DMERR("get_failover_bio: alloc_page() failed."); - bio_put(bio); - return NULL; - } - - if (bio_add_page(bio, page, data_size, 0) != data_size) { - DMERR("get_failover_bio: bio_add_page() failed."); - __free_page(page); - bio_put(bio); - return NULL; - } - - return bio; -} - -static struct request *get_failover_req(struct emc_handler *h, - struct bio *bio, struct dm_path *path) -{ - struct request *rq; - struct block_device *bdev = bio->bi_bdev; - struct request_queue *q = bdev_get_queue(bdev); - - /* FIXME: Figure out why it fails with GFP_ATOMIC. */ - rq = blk_get_request(q, WRITE, __GFP_WAIT); - if (!rq) { - DMERR("get_failover_req: blk_get_request failed"); - return NULL; - } - - blk_rq_append_bio(q, rq, bio); - - rq->sense = h->sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - rq->timeout = EMC_FAILOVER_TIMEOUT; - rq->cmd_type = REQ_TYPE_BLOCK_PC; - rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE; - - return rq; -} - -static struct request *emc_trespass_get(struct emc_handler *h, - struct dm_path *path) -{ - struct bio *bio; - struct request *rq; - unsigned char *page22; - unsigned char long_trespass_pg[] = { - 0, 0, 0, 0, - TRESPASS_PAGE, /* Page code */ - 0x09, /* Page length - 2 */ - h->hr ? 0x01 : 0x81, /* Trespass code + Honor reservation bit */ - 0xff, 0xff, /* Trespass target */ - 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ - }; - unsigned char short_trespass_pg[] = { - 0, 0, 0, 0, - TRESPASS_PAGE, /* Page code */ - 0x02, /* Page length - 2 */ - h->hr ? 0x01 : 0x81, /* Trespass code + Honor reservation bit */ - 0xff, /* Trespass target */ - }; - unsigned data_size = h->short_trespass ? sizeof(short_trespass_pg) : - sizeof(long_trespass_pg); - - /* get bio backing */ - if (data_size > PAGE_SIZE) - /* this should never happen */ - return NULL; - - bio = get_failover_bio(path, data_size); - if (!bio) { - DMERR("emc_trespass_get: no bio"); - return NULL; - } - - page22 = (unsigned char *)bio_data(bio); - memset(page22, 0, data_size); - - memcpy(page22, h->short_trespass ? - short_trespass_pg : long_trespass_pg, data_size); - - /* get request for block layer packet command */ - rq = get_failover_req(h, bio, path); - if (!rq) { - DMERR("emc_trespass_get: no rq"); - free_bio(bio); - return NULL; - } - - /* Prepare the command. */ - rq->cmd[0] = MODE_SELECT; - rq->cmd[1] = 0x10; - rq->cmd[4] = data_size; - rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); - - return rq; -} - -static void emc_pg_init(struct hw_handler *hwh, unsigned bypassed, - struct dm_path *path) -{ - struct request *rq; - struct request_queue *q = bdev_get_queue(path->dev->bdev); - - /* - * We can either blindly init the pg (then look at the sense), - * or we can send some commands to get the state here (then - * possibly send the fo cmnd), or we can also have the - * initial state passed into us and then get an update here. - */ - if (!q) { - DMINFO("emc_pg_init: no queue"); - goto fail_path; - } - - /* FIXME: The request should be pre-allocated. */ - rq = emc_trespass_get(hwh->context, path); - if (!rq) { - DMERR("emc_pg_init: no rq"); - goto fail_path; - } - - DMINFO("emc_pg_init: sending switch-over command"); - elv_add_request(q, rq, ELEVATOR_INSERT_FRONT, 1); - return; - -fail_path: - dm_pg_init_complete(path, MP_FAIL_PATH); -} - -static struct emc_handler *alloc_emc_handler(void) -{ - struct emc_handler *h = kzalloc(sizeof(*h), GFP_KERNEL); - - if (h) - spin_lock_init(&h->lock); - - return h; -} - -static int emc_create(struct hw_handler *hwh, unsigned argc, char **argv) -{ - struct emc_handler *h; - unsigned hr, short_trespass; - - if (argc == 0) { - /* No arguments: use defaults */ - hr = 0; - short_trespass = 0; - } else if (argc != 2) { - DMWARN("incorrect number of arguments"); - return -EINVAL; - } else { - if ((sscanf(argv[0], "%u", &short_trespass) != 1) - || (short_trespass > 1)) { - DMWARN("invalid trespass mode selected"); - return -EINVAL; - } - - if ((sscanf(argv[1], "%u", &hr) != 1) - || (hr > 1)) { - DMWARN("invalid honor reservation flag selected"); - return -EINVAL; - } - } - - h = alloc_emc_handler(); - if (!h) - return -ENOMEM; - - hwh->context = h; - - if ((h->short_trespass = short_trespass)) - DMWARN("short trespass command will be send"); - else - DMWARN("long trespass command will be send"); - - if ((h->hr = hr)) - DMWARN("honor reservation bit will be set"); - else - DMWARN("honor reservation bit will not be set (default)"); - - return 0; -} - -static void emc_destroy(struct hw_handler *hwh) -{ - struct emc_handler *h = (struct emc_handler *) hwh->context; - - kfree(h); - hwh->context = NULL; -} - -static unsigned emc_error(struct hw_handler *hwh, struct bio *bio) -{ - /* FIXME: Patch from axboe still missing */ -#if 0 - int sense; - - if (bio->bi_error & BIO_SENSE) { - sense = bio->bi_error & 0xffffff; /* sense key / asc / ascq */ - - if (sense == 0x020403) { - /* LUN Not Ready - Manual Intervention Required - * indicates this is a passive path. - * - * FIXME: However, if this is seen and EVPD C0 - * indicates that this is due to a NDU in - * progress, we should set FAIL_PATH too. - * This indicates we might have to do a SCSI - * inquiry in the end_io path. Ugh. */ - return MP_BYPASS_PG | MP_RETRY_IO; - } else if (sense == 0x052501) { - /* An array based copy is in progress. Do not - * fail the path, do not bypass to another PG, - * do not retry. Fail the IO immediately. - * (Actually this is the same conclusion as in - * the default handler, but lets make sure.) */ - return 0; - } else if (sense == 0x062900) { - /* Unit Attention Code. This is the first IO - * to the new path, so just retry. */ - return MP_RETRY_IO; - } - } -#endif - - /* Try default handler */ - return dm_scsi_err_handler(hwh, bio); -} - -static struct hw_handler_type emc_hwh = { - .name = "emc", - .module = THIS_MODULE, - .create = emc_create, - .destroy = emc_destroy, - .pg_init = emc_pg_init, - .error = emc_error, -}; - -static int __init dm_emc_init(void) -{ - int r = dm_register_hw_handler(&emc_hwh); - - if (r < 0) - DMERR("register failed %d", r); - - DMINFO("version 0.0.3 loaded"); - - return r; -} - -static void __exit dm_emc_exit(void) -{ - int r = dm_unregister_hw_handler(&emc_hwh); - - if (r < 0) - DMERR("unregister failed %d", r); -} - -module_init(dm_emc_init); -module_exit(dm_emc_exit); - -MODULE_DESCRIPTION(DM_NAME " EMC CX/AX/FC-family multipath"); -MODULE_AUTHOR("Lars Marowsky-Bree <lmb@suse.de>"); -MODULE_LICENSE("GPL"); diff --git a/drivers/md/dm-hw-handler.c b/drivers/md/dm-hw-handler.c deleted file mode 100644 index 2ee84d8..0000000 --- a/drivers/md/dm-hw-handler.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Copyright (C) 2004 Red Hat, Inc. All rights reserved. - * - * This file is released under the GPL. - * - * Multipath hardware handler registration. - */ - -#include "dm.h" -#include "dm-hw-handler.h" - -#include <linux/slab.h> - -struct hwh_internal { - struct hw_handler_type hwht; - - struct list_head list; - long use; -}; - -#define hwht_to_hwhi(__hwht) container_of((__hwht), struct hwh_internal, hwht) - -static LIST_HEAD(_hw_handlers); -static DECLARE_RWSEM(_hwh_lock); - -static struct hwh_internal *__find_hw_handler_type(const char *name) -{ - struct hwh_internal *hwhi; - - list_for_each_entry(hwhi, &_hw_handlers, list) { - if (!strcmp(name, hwhi->hwht.name)) - return hwhi; - } - - return NULL; -} - -static struct hwh_internal *get_hw_handler(const char *name) -{ - struct hwh_internal *hwhi; - - down_read(&_hwh_lock); - hwhi = __find_hw_handler_type(name); - if (hwhi) { - if ((hwhi->use == 0) && !try_module_get(hwhi->hwht.module)) - hwhi = NULL; - else - hwhi->use++; - } - up_read(&_hwh_lock); - - return hwhi; -} - -struct hw_handler_type *dm_get_hw_handler(const char *name) -{ - struct hwh_internal *hwhi; - - if (!name) - return NULL; - - hwhi = get_hw_handler(name); - if (!hwhi) { - request_module("dm-%s", name); - hwhi = get_hw_handler(name); - } - - return hwhi ? &hwhi->hwht : NULL; -} - -void dm_put_hw_handler(struct hw_handler_type *hwht) -{ - struct hwh_internal *hwhi; - - if (!hwht) - return; - - down_read(&_hwh_lock); - hwhi = __find_hw_handler_type(hwht->name); - if (!hwhi) - goto out; - - if (--hwhi->use == 0) - module_put(hwhi->hwht.module); - - BUG_ON(hwhi->use < 0); - - out: - up_read(&_hwh_lock); -} - -static struct hwh_internal *_alloc_hw_handler(struct hw_handler_type *hwht) -{ - struct hwh_internal *hwhi = kzalloc(sizeof(*hwhi), GFP_KERNEL); - - if (hwhi) - hwhi->hwht = *hwht; - - return hwhi; -} - -int dm_register_hw_handler(struct hw_handler_type *hwht) -{ - int r = 0; - struct hwh_internal *hwhi = _alloc_hw_handler(hwht); - - if (!hwhi) - return -ENOMEM; - - down_write(&_hwh_lock); - - if (__find_hw_handler_type(hwht->name)) { - kfree(hwhi); - r = -EEXIST; - } else - list_add(&hwhi->list, &_hw_handlers); - - up_write(&_hwh_lock); - - return r; -} - -int dm_unregister_hw_handler(struct hw_handler_type *hwht) -{ - struct hwh_internal *hwhi; - - down_write(&_hwh_lock); - - hwhi = __find_hw_handler_type(hwht->name); - if (!hwhi) { - up_write(&_hwh_lock); - return -EINVAL; - } - - if (hwhi->use) { - up_write(&_hwh_lock); - return -ETXTBSY; - } - - list_del(&hwhi->list); - - up_write(&_hwh_lock); - - kfree(hwhi); - - return 0; -} - -unsigned dm_scsi_err_handler(struct hw_handler *hwh, struct bio *bio) -{ -#if 0 - int sense_key, asc, ascq; - - if (bio->bi_error & BIO_SENSE) { - /* FIXME: This is just an initial guess. */ - /* key / asc / ascq */ - sense_key = (bio->bi_error >> 16) & 0xff; - asc = (bio->bi_error >> 8) & 0xff; - ascq = bio->bi_error & 0xff; - - switch (sense_key) { - /* This block as a whole comes from the device. - * So no point retrying on another path. */ - case 0x03: /* Medium error */ - case 0x05: /* Illegal request */ - case 0x07: /* Data protect */ - case 0x08: /* Blank check */ - case 0x0a: /* copy aborted */ - case 0x0c: /* obsolete - no clue ;-) */ - case 0x0d: /* volume overflow */ - case 0x0e: /* data miscompare */ - case 0x0f: /* reserved - no idea either. */ - return MP_ERROR_IO; - - /* For these errors it's unclear whether they - * come from the device or the controller. - * So just lets try a different path, and if - * it eventually succeeds, user-space will clear - * the paths again... */ - case 0x02: /* Not ready */ - case 0x04: /* Hardware error */ - case 0x09: /* vendor specific */ - case 0x0b: /* Aborted command */ - return MP_FAIL_PATH; - - case 0x06: /* Unit attention - might want to decode */ - if (asc == 0x04 && ascq == 0x01) - /* "Unit in the process of - * becoming ready" */ - return 0; - return MP_FAIL_PATH; - - /* FIXME: For Unit Not Ready we may want - * to have a generic pg activation - * feature (START_UNIT). */ - - /* Should these two ever end up in the - * error path? I don't think so. */ - case 0x00: /* No sense */ - case 0x01: /* Recovered error */ - return 0; - } - } -#endif - - /* We got no idea how to decode the other kinds of errors -> - * assume generic error condition. */ - return MP_FAIL_PATH; -} - -EXPORT_SYMBOL_GPL(dm_register_hw_handler); -EXPORT_SYMBOL_GPL(dm_unregister_hw_handler); -EXPORT_SYMBOL_GPL(dm_scsi_err_handler); diff --git a/drivers/md/dm-hw-handler.h b/drivers/md/dm-hw-handler.h deleted file mode 100644 index 46809dc..0000000 --- a/drivers/md/dm-hw-handler.h +++ /dev/null @@ -1,63 +0,0 @@ -/* - * Copyright (C) 2004 Red Hat, Inc. All rights reserved. - * - * This file is released under the GPL. - * - * Multipath hardware handler registration. - */ - -#ifndef DM_HW_HANDLER_H -#define DM_HW_HANDLER_H - -#include <linux/device-mapper.h> - -#include "dm-mpath.h" - -struct hw_handler_type; -struct hw_handler { - struct hw_handler_type *type; - struct mapped_device *md; - void *context; -}; - -/* - * Constructs a hardware handler object, takes custom arguments - */ -/* Information about a hardware handler type */ -struct hw_handler_type { - char *name; - struct module *module; - - int (*create) (struct hw_handler *handler, unsigned int argc, - char **argv); - void (*destroy) (struct hw_handler *hwh); - - void (*pg_init) (struct hw_handler *hwh, unsigned bypassed, - struct dm_path *path); - unsigned (*error) (struct hw_handler *hwh, struct bio *bio); - int (*status) (struct hw_handler *hwh, status_type_t type, - char *result, unsigned int maxlen); -}; - -/* Register a hardware handler */ -int dm_register_hw_handler(struct hw_handler_type *type); - -/* Unregister a hardware handler */ -int dm_unregister_hw_handler(struct hw_handler_type *type); - -/* Returns a registered hardware handler type */ -struct hw_handler_type *dm_get_hw_handler(const char *name); - -/* Releases a hardware handler */ -void dm_put_hw_handler(struct hw_handler_type *hwht); - -/* Default err function */ -unsigned dm_scsi_err_handler(struct hw_handler *hwh, struct bio *bio); - -/* Error flags for err and dm_pg_init_complete */ -#define MP_FAIL_PATH 1 -#define MP_BYPASS_PG 2 -#define MP_ERROR_IO 4 /* Don't retry this I/O */ -#define MP_RETRY 8 - -#endif diff --git a/drivers/md/dm-mpath-hp-sw.c b/drivers/md/dm-mpath-hp-sw.c deleted file mode 100644 index b63a0ab..0000000 --- a/drivers/md/dm-mpath-hp-sw.c +++ /dev/null @@ -1,247 +0,0 @@ -/* - * Copyright (C) 2005 Mike Christie, All rights reserved. - * Copyright (C) 2007 Red Hat, Inc. All rights reserved. - * Authors: Mike Christie - * Dave Wysochanski - * - * This file is released under the GPL. - * - * This module implements the specific path activation code for - * HP StorageWorks and FSC FibreCat Asymmetric (Active/Passive) - * storage arrays. - * These storage arrays have controller-based failover, not - * LUN-based failover. However, LUN-based failover is the design - * of dm-multipath. Thus, this module is written for LUN-based failover. - */ -#include <linux/blkdev.h> -#include <linux/list.h> -#include <linux/types.h> -#include <scsi/scsi.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_dbg.h> - -#include "dm.h" -#include "dm-hw-handler.h" - -#define DM_MSG_PREFIX "multipath hp-sw" -#define DM_HP_HWH_NAME "hp-sw" -#define DM_HP_HWH_VER "1.0.0" - -struct hp_sw_context { - unsigned char sense[SCSI_SENSE_BUFFERSIZE]; -}; - -/* - * hp_sw_error_is_retryable - Is an HP-specific check condition retryable? - * @req: path activation request - * - * Examine error codes of request and determine whether the error is retryable. - * Some error codes are already retried by scsi-ml (see - * scsi_decide_disposition), but some HP specific codes are not. - * The intent of this routine is to supply the logic for the HP specific - * check conditions. - * - * Returns: - * 1 - command completed with retryable error - * 0 - command completed with non-retryable error - * - * Possible optimizations - * 1. More hardware-specific error codes - */ -static int hp_sw_error_is_retryable(struct request *req) -{ - /* - * NOT_READY is known to be retryable - * For now we just dump out the sense data and call it retryable - */ - if (status_byte(req->errors) == CHECK_CONDITION) - __scsi_print_sense(DM_HP_HWH_NAME, req->sense, req->sense_len); - - /* - * At this point we don't have complete information about all the error - * codes from this hardware, so we are just conservative and retry - * when in doubt. - */ - return 1; -} - -/* - * hp_sw_end_io - Completion handler for HP path activation. - * @req: path activation request - * @error: scsi-ml error - * - * Check sense data, free request structure, and notify dm that - * pg initialization has completed. - * - * Context: scsi-ml softirq - * - */ -static void hp_sw_end_io(struct request *req, int error) -{ - struct dm_path *path = req->end_io_data; - unsigned err_flags = 0; - - if (!error) { - DMDEBUG("%s path activation command - success", - path->dev->name); - goto out; - } - - if (hp_sw_error_is_retryable(req)) { - DMDEBUG("%s path activation command - retry", - path->dev->name); - err_flags = MP_RETRY; - goto out; - } - - DMWARN("%s path activation fail - error=0x%x", - path->dev->name, error); - err_flags = MP_FAIL_PATH; - -out: - req->end_io_data = NULL; - __blk_put_request(req->q, req); - dm_pg_init_complete(path, err_flags); -} - -/* - * hp_sw_get_request - Allocate an HP specific path activation request - * @path: path on which request will be sent (needed for request queue) - * - * The START command is used for path activation request. - * These arrays are controller-based failover, not LUN based. - * One START command issued to a single path will fail over all - * LUNs for the same controller. - * - * Possible optimizations - * 1. Make timeout configurable - * 2. Preallocate request - */ -static struct request *hp_sw_get_request(struct dm_path *path) -{ - struct request *req; - struct block_device *bdev = path->dev->bdev; - struct request_queue *q = bdev_get_queue(bdev); - struct hp_sw_context *h = path->hwhcontext; - - req = blk_get_request(q, WRITE, GFP_NOIO); - if (!req) - goto out; - - req->timeout = 60 * HZ; - - req->errors = 0; - req->cmd_type = REQ_TYPE_BLOCK_PC; - req->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE; - req->end_io_data = path; - req->sense = h->sense; - memset(req->sense, 0, SCSI_SENSE_BUFFERSIZE); - - req->cmd[0] = START_STOP; - req->cmd[4] = 1; - req->cmd_len = COMMAND_SIZE(req->cmd[0]); - -out: - return req; -} - -/* - * hp_sw_pg_init - HP path activation implementation. - * @hwh: hardware handler specific data - * @bypassed: unused; is the path group bypassed? (see dm-mpath.c) - * @path: path to send initialization command - * - * Send an HP-specific path activation command on 'path'. - * Do not try to optimize in any way, just send the activation command. - * More than one path activation command may be sent to the same controller. - * This seems to work fine for basic failover support. - * - * Possible optimizations - * 1. Detect an in-progress activation request and avoid submitting another one - * 2. Model the controller and only send a single activation request at a time - * 3. Determine the state of a path before sending an activation request - * - * Context: kmpathd (see process_queued_ios() in dm-mpath.c) - */ -static void hp_sw_pg_init(struct hw_handler *hwh, unsigned bypassed, - struct dm_path *path) -{ - struct request *req; - struct hp_sw_context *h; - - path->hwhcontext = hwh->context; - h = hwh->context; - - req = hp_sw_get_request(path); - if (!req) { - DMERR("%s path activation command - allocation fail", - path->dev->name); - goto retry; - } - - DMDEBUG("%s path activation command - sent", path->dev->name); - - blk_execute_rq_nowait(req->q, NULL, req, 1, hp_sw_end_io); - return; - -retry: - dm_pg_init_complete(path, MP_RETRY); -} - -static int hp_sw_create(struct hw_handler *hwh, unsigned argc, char **argv) -{ - struct hp_sw_context *h; - - h = kmalloc(sizeof(*h), GFP_KERNEL); - if (!h) - return -ENOMEM; - - hwh->context = h; - - return 0; -} - -static void hp_sw_destroy(struct hw_handler *hwh) -{ - struct hp_sw_context *h = hwh->context; - - kfree(h); -} - -static struct hw_handler_type hp_sw_hwh = { - .name = DM_HP_HWH_NAME, - .module = THIS_MODULE, - .create = hp_sw_create, - .destroy = hp_sw_destroy, - .pg_init = hp_sw_pg_init, -}; - -static int __init hp_sw_init(void) -{ - int r; - - r = dm_register_hw_handler(&hp_sw_hwh); - if (r < 0) - DMERR("register failed %d", r); - else - DMINFO("version " DM_HP_HWH_VER " loaded"); - - return r; -} - -static void __exit hp_sw_exit(void) -{ - int r; - - r = dm_unregister_hw_handler(&hp_sw_hwh); - if (r < 0) - DMERR("unregister failed %d", r); -} - -module_init(hp_sw_init); -module_exit(hp_sw_exit); - -MODULE_DESCRIPTION("DM Multipath HP StorageWorks / FSC FibreCat (A/P) support"); -MODULE_AUTHOR("Mike Christie, Dave Wysochanski <dm-devel@redhat.com>"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DM_HP_HWH_VER); diff --git a/drivers/md/dm-mpath-rdac.c b/drivers/md/dm-mpath-rdac.c deleted file mode 100644 index 95e7773..0000000 --- a/drivers/md/dm-mpath-rdac.c +++ /dev/null @@ -1,700 +0,0 @@ -/* - * Engenio/LSI RDAC DM HW handler - * - * Copyright (C) 2005 Mike Christie. All rights reserved. - * Copyright (C) Chandra Seetharaman, IBM Corp. 2007 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - */ -#include <scsi/scsi.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_eh.h> - -#define DM_MSG_PREFIX "multipath rdac" - -#include "dm.h" -#include "dm-hw-handler.h" - -#define RDAC_DM_HWH_NAME "rdac" -#define RDAC_DM_HWH_VER "0.4" - -/* - * LSI mode page stuff - * - * These struct definitions and the forming of the - * mode page were taken from the LSI RDAC 2.4 GPL'd - * driver, and then converted to Linux conventions. - */ -#define RDAC_QUIESCENCE_TIME 20; -/* - * Page Codes - */ -#define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c - -/* - * Controller modes definitions - */ -#define RDAC_MODE_TRANSFER_ALL_LUNS 0x01 -#define RDAC_MODE_TRANSFER_SPECIFIED_LUNS 0x02 - -/* - * RDAC Options field - */ -#define RDAC_FORCED_QUIESENCE 0x02 - -#define RDAC_FAILOVER_TIMEOUT (60 * HZ) - -struct rdac_mode_6_hdr { - u8 data_len; - u8 medium_type; - u8 device_params; - u8 block_desc_len; -}; - -struct rdac_mode_10_hdr { - u16 data_len; - u8 medium_type; - u8 device_params; - u16 reserved; - u16 block_desc_len; -}; - -struct rdac_mode_common { - u8 controller_serial[16]; - u8 alt_controller_serial[16]; - u8 rdac_mode[2]; - u8 alt_rdac_mode[2]; - u8 quiescence_timeout; - u8 rdac_options; -}; - -struct rdac_pg_legacy { - struct rdac_mode_6_hdr hdr; - u8 page_code; - u8 page_len; - struct rdac_mode_common common; -#define MODE6_MAX_LUN 32 - u8 lun_table[MODE6_MAX_LUN]; - u8 reserved2[32]; - u8 reserved3; - u8 reserved4; -}; - -struct rdac_pg_expanded { - struct rdac_mode_10_hdr hdr; - u8 page_code; - u8 subpage_code; - u8 page_len[2]; - struct rdac_mode_common common; - u8 lun_table[256]; - u8 reserved3; - u8 reserved4; -}; - -struct c9_inquiry { - u8 peripheral_info; - u8 page_code; /* 0xC9 */ - u8 reserved1; - u8 page_len; - u8 page_id[4]; /* "vace" */ - u8 avte_cvp; - u8 path_prio; - u8 reserved2[38]; -}; - -#define SUBSYS_ID_LEN 16 -#define SLOT_ID_LEN 2 - -struct c4_inquiry { - u8 peripheral_info; - u8 page_code; /* 0xC4 */ - u8 reserved1; - u8 page_len; - u8 page_id[4]; /* "subs" */ - u8 subsys_id[SUBSYS_ID_LEN]; - u8 revision[4]; - u8 slot_id[SLOT_ID_LEN]; - u8 reserved[2]; -}; - -struct rdac_controller { - u8 subsys_id[SUBSYS_ID_LEN]; - u8 slot_id[SLOT_ID_LEN]; - int use_10_ms; - struct kref kref; - struct list_head node; /* list of all controllers */ - spinlock_t lock; - int submitted; - struct list_head cmd_list; /* list of commands to be submitted */ - union { - struct rdac_pg_legacy legacy; - struct rdac_pg_expanded expanded; - } mode_select; -}; -struct c8_inquiry { - u8 peripheral_info; - u8 page_code; /* 0xC8 */ - u8 reserved1; - u8 page_len; - u8 page_id[4]; /* "edid" */ - u8 reserved2[3]; - u8 vol_uniq_id_len; - u8 vol_uniq_id[16]; - u8 vol_user_label_len; - u8 vol_user_label[60]; - u8 array_uniq_id_len; - u8 array_unique_id[16]; - u8 array_user_label_len; - u8 array_user_label[60]; - u8 lun[8]; -}; - -struct c2_inquiry { - u8 peripheral_info; - u8 page_code; /* 0xC2 */ - u8 reserved1; - u8 page_len; - u8 page_id[4]; /* "swr4" */ - u8 sw_version[3]; - u8 sw_date[3]; - u8 features_enabled; - u8 max_lun_supported; - u8 partitions[239]; /* Total allocation length should be 0xFF */ -}; - -struct rdac_handler { - struct list_head entry; /* list waiting to submit MODE SELECT */ - unsigned timeout; - struct rdac_controller *ctlr; -#define UNINITIALIZED_LUN (1 << 8) - unsigned lun; - unsigned char sense[SCSI_SENSE_BUFFERSIZE]; - struct dm_path *path; - struct work_struct work; -#define SEND_C2_INQUIRY 1 -#define SEND_C4_INQUIRY 2 -#define SEND_C8_INQUIRY 3 -#define SEND_C9_INQUIRY 4 -#define SEND_MODE_SELECT 5 - int cmd_to_send; - union { - struct c2_inquiry c2; - struct c4_inquiry c4; - struct c8_inquiry c8; - struct c9_inquiry c9; - } inq; -}; - -static LIST_HEAD(ctlr_list); -static DEFINE_SPINLOCK(list_lock); -static struct workqueue_struct *rdac_wkqd; - -static inline int had_failures(struct request *req, int error) -{ - return (error || host_byte(req->errors) != DID_OK || - msg_byte(req->errors) != COMMAND_COMPLETE); -} - -static void rdac_resubmit_all(struct rdac_handler *h) -{ - struct rdac_controller *ctlr = h->ctlr; - struct rdac_handler *tmp, *h1; - - spin_lock(&ctlr->lock); - list_for_each_entry_safe(h1, tmp, &ctlr->cmd_list, entry) { - h1->cmd_to_send = SEND_C9_INQUIRY; - queue_work(rdac_wkqd, &h1->work); - list_del(&h1->entry); - } - ctlr->submitted = 0; - spin_unlock(&ctlr->lock); -} - -static void mode_select_endio(struct request *req, int error) -{ - struct rdac_handler *h = req->end_io_data; - struct scsi_sense_hdr sense_hdr; - int sense = 0, fail = 0; - - if (had_failures(req, error)) { - fail = 1; - goto failed; - } - - if (status_byte(req->errors) == CHECK_CONDITION) { - scsi_normalize_sense(req->sense, SCSI_SENSE_BUFFERSIZE, - &sense_hdr); - sense = (sense_hdr.sense_key << 16) | (sense_hdr.asc << 8) | - sense_hdr.ascq; - /* If it is retryable failure, submit the c9 inquiry again */ - if (sense == 0x59136 || sense == 0x68b02 || sense == 0xb8b02 || - sense == 0x62900) { - /* 0x59136 - Command lock contention - * 0x[6b]8b02 - Quiesense in progress or achieved - * 0x62900 - Power On, Reset, or Bus Device Reset - */ - h->cmd_to_send = SEND_C9_INQUIRY; - queue_work(rdac_wkqd, &h->work); - goto done; - } - if (sense) - DMINFO("MODE_SELECT failed on %s with sense 0x%x", - h->path->dev->name, sense); - } -failed: - if (fail || sense) - dm_pg_init_complete(h->path, MP_FAIL_PATH); - else - dm_pg_init_complete(h->path, 0); - -done: - rdac_resubmit_all(h); - __blk_put_request(req->q, req); -} - -static struct request *get_rdac_req(struct rdac_handler *h, - void *buffer, unsigned buflen, int rw) -{ - struct request *rq; - struct request_queue *q = bdev_get_queue(h->path->dev->bdev); - - rq = blk_get_request(q, rw, GFP_KERNEL); - - if (!rq) { - DMINFO("get_rdac_req: blk_get_request failed"); - return NULL; - } - - if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_KERNEL)) { - blk_put_request(rq); - DMINFO("get_rdac_req: blk_rq_map_kern failed"); - return NULL; - } - - rq->sense = h->sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - rq->end_io_data = h; - rq->timeout = h->timeout; - rq->cmd_type = REQ_TYPE_BLOCK_PC; - rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE; - return rq; -} - -static struct request *rdac_failover_get(struct rdac_handler *h) -{ - struct request *rq; - struct rdac_mode_common *common; - unsigned data_size; - - if (h->ctlr->use_10_ms) { - struct rdac_pg_expanded *rdac_pg; - - data_size = sizeof(struct rdac_pg_expanded); - rdac_pg = &h->ctlr->mode_select.expanded; - memset(rdac_pg, 0, data_size); - common = &rdac_pg->common; - rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER + 0x40; - rdac_pg->subpage_code = 0x1; - rdac_pg->page_len[0] = 0x01; - rdac_pg->page_len[1] = 0x28; - rdac_pg->lun_table[h->lun] = 0x81; - } else { - struct rdac_pg_legacy *rdac_pg; - - data_size = sizeof(struct rdac_pg_legacy); - rdac_pg = &h->ctlr->mode_select.legacy; - memset(rdac_pg, 0, data_size); - common = &rdac_pg->common; - rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER; - rdac_pg->page_len = 0x68; - rdac_pg->lun_table[h->lun] = 0x81; - } - common->rdac_mode[1] = RDAC_MODE_TRANSFER_SPECIFIED_LUNS; - common->quiescence_timeout = RDAC_QUIESCENCE_TIME; - common->rdac_options = RDAC_FORCED_QUIESENCE; - - /* get request for block layer packet command */ - rq = get_rdac_req(h, &h->ctlr->mode_select, data_size, WRITE); - if (!rq) { - DMERR("rdac_failover_get: no rq"); - return NULL; - } - - /* Prepare the command. */ - if (h->ctlr->use_10_ms) { - rq->cmd[0] = MODE_SELECT_10; - rq->cmd[7] = data_size >> 8; - rq->cmd[8] = data_size & 0xff; - } else { - rq->cmd[0] = MODE_SELECT; - rq->cmd[4] = data_size; - } - rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); - - return rq; -} - -/* Acquires h->ctlr->lock */ -static void submit_mode_select(struct rdac_handler *h) -{ - struct request *rq; - struct request_queue *q = bdev_get_queue(h->path->dev->bdev); - - spin_lock(&h->ctlr->lock); - if (h->ctlr->submitted) { - list_add(&h->entry, &h->ctlr->cmd_list); - goto drop_lock; - } - - if (!q) { - DMINFO("submit_mode_select: no queue"); - goto fail_path; - } - - rq = rdac_failover_get(h); - if (!rq) { - DMERR("submit_mode_select: no rq"); - goto fail_path; - } - - DMINFO("queueing MODE_SELECT command on %s", h->path->dev->name); - - blk_execute_rq_nowait(q, NULL, rq, 1, mode_select_endio); - h->ctlr->submitted = 1; - goto drop_lock; -fail_path: - dm_pg_init_complete(h->path, MP_FAIL_PATH); -drop_lock: - spin_unlock(&h->ctlr->lock); -} - -static void release_ctlr(struct kref *kref) -{ - struct rdac_controller *ctlr; - ctlr = container_of(kref, struct rdac_controller, kref); - - spin_lock(&list_lock); - list_del(&ctlr->node); - spin_unlock(&list_lock); - kfree(ctlr); -} - -static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id) -{ - struct rdac_controller *ctlr, *tmp; - - spin_lock(&list_lock); - - list_for_each_entry(tmp, &ctlr_list, node) { - if ((memcmp(tmp->subsys_id, subsys_id, SUBSYS_ID_LEN) == 0) && - (memcmp(tmp->slot_id, slot_id, SLOT_ID_LEN) == 0)) { - kref_get(&tmp->kref); - spin_unlock(&list_lock); - return tmp; - } - } - ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC); - if (!ctlr) - goto done; - - /* initialize fields of controller */ - memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN); - memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN); - kref_init(&ctlr->kref); - spin_lock_init(&ctlr->lock); - ctlr->submitted = 0; - ctlr->use_10_ms = -1; - INIT_LIST_HEAD(&ctlr->cmd_list); - list_add(&ctlr->node, &ctlr_list); -done: - spin_unlock(&list_lock); - return ctlr; -} - -static void c4_endio(struct request *req, int error) -{ - struct rdac_handler *h = req->end_io_data; - struct c4_inquiry *sp; - - if (had_failures(req, error)) { - dm_pg_init_complete(h->path, MP_FAIL_PATH); - goto done; - } - - sp = &h->inq.c4; - - h->ctlr = get_controller(sp->subsys_id, sp->slot_id); - - if (h->ctlr) { - h->cmd_to_send = SEND_C9_INQUIRY; - queue_work(rdac_wkqd, &h->work); - } else - dm_pg_init_complete(h->path, MP_FAIL_PATH); -done: - __blk_put_request(req->q, req); -} - -static void c2_endio(struct request *req, int error) -{ - struct rdac_handler *h = req->end_io_data; - struct c2_inquiry *sp; - - if (had_failures(req, error)) { - dm_pg_init_complete(h->path, MP_FAIL_PATH); - goto done; - } - - sp = &h->inq.c2; - - /* If more than MODE6_MAX_LUN luns are supported, use mode select 10 */ - if (sp->max_lun_supported >= MODE6_MAX_LUN) - h->ctlr->use_10_ms = 1; - else - h->ctlr->use_10_ms = 0; - - h->cmd_to_send = SEND_MODE_SELECT; - queue_work(rdac_wkqd, &h->work); -done: - __blk_put_request(req->q, req); -} - -static void c9_endio(struct request *req, int error) -{ - struct rdac_handler *h = req->end_io_data; - struct c9_inquiry *sp; - - if (had_failures(req, error)) { - dm_pg_init_complete(h->path, MP_FAIL_PATH); - goto done; - } - - /* We need to look at the sense keys here to take clear action. - * For now simple logic: If the host is in AVT mode or if controller - * owns the lun, return dm_pg_init_complete(), otherwise submit - * MODE SELECT. - */ - sp = &h->inq.c9; - - /* If in AVT mode, return success */ - if ((sp->avte_cvp >> 7) == 0x1) { - dm_pg_init_complete(h->path, 0); - goto done; - } - - /* If the controller on this path owns the LUN, return success */ - if (sp->avte_cvp & 0x1) { - dm_pg_init_complete(h->path, 0); - goto done; - } - - if (h->ctlr) { - if (h->ctlr->use_10_ms == -1) - h->cmd_to_send = SEND_C2_INQUIRY; - else - h->cmd_to_send = SEND_MODE_SELECT; - } else - h->cmd_to_send = SEND_C4_INQUIRY; - queue_work(rdac_wkqd, &h->work); -done: - __blk_put_request(req->q, req); -} - -static void c8_endio(struct request *req, int error) -{ - struct rdac_handler *h = req->end_io_data; - struct c8_inquiry *sp; - - if (had_failures(req, error)) { - dm_pg_init_complete(h->path, MP_FAIL_PATH); - goto done; - } - - /* We need to look at the sense keys here to take clear action. - * For now simple logic: Get the lun from the inquiry page. - */ - sp = &h->inq.c8; - h->lun = sp->lun[7]; /* currently it uses only one byte */ - h->cmd_to_send = SEND_C9_INQUIRY; - queue_work(rdac_wkqd, &h->work); -done: - __blk_put_request(req->q, req); -} - -static void submit_inquiry(struct rdac_handler *h, int page_code, - unsigned int len, rq_end_io_fn endio) -{ - struct request *rq; - struct request_queue *q = bdev_get_queue(h->path->dev->bdev); - - if (!q) - goto fail_path; - - rq = get_rdac_req(h, &h->inq, len, READ); - if (!rq) - goto fail_path; - - /* Prepare the command. */ - rq->cmd[0] = INQUIRY; - rq->cmd[1] = 1; - rq->cmd[2] = page_code; - rq->cmd[4] = len; - rq->cmd_len = COMMAND_SIZE(INQUIRY); - blk_execute_rq_nowait(q, NULL, rq, 1, endio); - return; - -fail_path: - dm_pg_init_complete(h->path, MP_FAIL_PATH); -} - -static void service_wkq(struct work_struct *work) -{ - struct rdac_handler *h = container_of(work, struct rdac_handler, work); - - switch (h->cmd_to_send) { - case SEND_C2_INQUIRY: - submit_inquiry(h, 0xC2, sizeof(struct c2_inquiry), c2_endio); - break; - case SEND_C4_INQUIRY: - submit_inquiry(h, 0xC4, sizeof(struct c4_inquiry), c4_endio); - break; - case SEND_C8_INQUIRY: - submit_inquiry(h, 0xC8, sizeof(struct c8_inquiry), c8_endio); - break; - case SEND_C9_INQUIRY: - submit_inquiry(h, 0xC9, sizeof(struct c9_inquiry), c9_endio); - break; - case SEND_MODE_SELECT: - submit_mode_select(h); - break; - default: - BUG(); - } -} -/* - * only support subpage2c until we confirm that this is just a matter of - * of updating firmware or not, and RDAC (basic AVT works already) for now - * but we can add these in in when we get time and testers - */ -static int rdac_create(struct hw_handler *hwh, unsigned argc, char **argv) -{ - struct rdac_handler *h; - unsigned timeout; - - if (argc == 0) { - /* No arguments: use defaults */ - timeout = RDAC_FAILOVER_TIMEOUT; - } else if (argc != 1) { - DMWARN("incorrect number of arguments"); - return -EINVAL; - } else { - if (sscanf(argv[1], "%u", &timeout) != 1) { - DMWARN("invalid timeout value"); - return -EINVAL; - } - } - - h = kzalloc(sizeof(*h), GFP_KERNEL); - if (!h) - return -ENOMEM; - - hwh->context = h; - h->timeout = timeout; - h->lun = UNINITIALIZED_LUN; - INIT_WORK(&h->work, service_wkq); - DMWARN("using RDAC command with timeout %u", h->timeout); - - return 0; -} - -static void rdac_destroy(struct hw_handler *hwh) -{ - struct rdac_handler *h = hwh->context; - - if (h->ctlr) - kref_put(&h->ctlr->kref, release_ctlr); - kfree(h); - hwh->context = NULL; -} - -static unsigned rdac_error(struct hw_handler *hwh, struct bio *bio) -{ - /* Try default handler */ - return dm_scsi_err_handler(hwh, bio); -} - -static void rdac_pg_init(struct hw_handler *hwh, unsigned bypassed, - struct dm_path *path) -{ - struct rdac_handler *h = hwh->context; - - h->path = path; - switch (h->lun) { - case UNINITIALIZED_LUN: - submit_inquiry(h, 0xC8, sizeof(struct c8_inquiry), c8_endio); - break; - default: - submit_inquiry(h, 0xC9, sizeof(struct c9_inquiry), c9_endio); - } -} - -static struct hw_handler_type rdac_handler = { - .name = RDAC_DM_HWH_NAME, - .module = THIS_MODULE, - .create = rdac_create, - .destroy = rdac_destroy, - .pg_init = rdac_pg_init, - .error = rdac_error, -}; - -static int __init rdac_init(void) -{ - int r; - - rdac_wkqd = create_singlethread_workqueue("rdac_wkqd"); - if (!rdac_wkqd) { - DMERR("Failed to create workqueue rdac_wkqd."); - return -ENOMEM; - } - - r = dm_register_hw_handler(&rdac_handler); - if (r < 0) { - DMERR("%s: register failed %d", RDAC_DM_HWH_NAME, r); - destroy_workqueue(rdac_wkqd); - return r; - } - - DMINFO("%s: version %s loaded", RDAC_DM_HWH_NAME, RDAC_DM_HWH_VER); - return 0; -} - -static void __exit rdac_exit(void) -{ - int r = dm_unregister_hw_handler(&rdac_handler); - - destroy_workqueue(rdac_wkqd); - if (r < 0) - DMERR("%s: unregister failed %d", RDAC_DM_HWH_NAME, r); -} - -module_init(rdac_init); -module_exit(rdac_exit); - -MODULE_DESCRIPTION("DM Multipath LSI/Engenio RDAC support"); -MODULE_AUTHOR("Mike Christie, Chandra Seetharaman"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(RDAC_DM_HWH_VER); diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index e7ee59e..9f7302d 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -7,7 +7,6 @@ #include "dm.h" #include "dm-path-selector.h" -#include "dm-hw-handler.h" #include "dm-bio-list.h" #include "dm-bio-record.h" #include "dm-uevent.h" @@ -20,6 +19,7 @@ #include <linux/slab.h> #include <linux/time.h> #include <linux/workqueue.h> +#include <scsi/scsi_dh.h> #include <asm/atomic.h> #define DM_MSG_PREFIX "multipath" @@ -61,7 +61,8 @@ struct multipath { spinlock_t lock; - struct hw_handler hw_handler; + const char *hw_handler_name; + struct work_struct activate_path; unsigned nr_priority_groups; struct list_head priority_groups; unsigned pg_init_required; /* pg_init needs calling? */ @@ -106,9 +107,10 @@ typedef int (*action_fn) (struct pgpath *pgpath); static struct kmem_cache *_mpio_cache; -static struct workqueue_struct *kmultipathd; +static struct workqueue_struct *kmultipathd, *kmpath_handlerd; static void process_queued_ios(struct work_struct *work); static void trigger_event(struct work_struct *work); +static void activate_path(struct work_struct *work); /*----------------------------------------------- @@ -178,6 +180,7 @@ static struct multipath *alloc_multipath(struct dm_target *ti) m->queue_io = 1; INIT_WORK(&m->process_queued_ios, process_queued_ios); INIT_WORK(&m->trigger_event, trigger_event); + INIT_WORK(&m->activate_path, activate_path); m->mpio_pool = mempool_create_slab_pool(MIN_IOS, _mpio_cache); if (!m->mpio_pool) { kfree(m); @@ -193,18 +196,13 @@ static struct multipath *alloc_multipath(struct dm_target *ti) static void free_multipath(struct multipath *m) { struct priority_group *pg, *tmp; - struct hw_handler *hwh = &m->hw_handler; list_for_each_entry_safe(pg, tmp, &m->priority_groups, list) { list_del(&pg->list); free_priority_group(pg, m->ti); } - if (hwh->type) { - hwh->type->destroy(hwh); - dm_put_hw_handler(hwh->type); - } - + kfree(m->hw_handler_name); mempool_destroy(m->mpio_pool); kfree(m); } @@ -216,12 +214,10 @@ static void free_multipath(struct multipath *m) static void __switch_pg(struct multipath *m, struct pgpath *pgpath) { - struct hw_handler *hwh = &m->hw_handler; - m->current_pg = pgpath->pg; /* Must we initialise the PG first, and queue I/O till it's ready? */ - if (hwh->type && hwh->type->pg_init) { + if (m->hw_handler_name) { m->pg_init_required = 1; m->queue_io = 1; } else { @@ -409,7 +405,6 @@ static void process_queued_ios(struct work_struct *work) { struct multipath *m = container_of(work, struct multipath, process_queued_ios); - struct hw_handler *hwh = &m->hw_handler; struct pgpath *pgpath = NULL; unsigned init_required = 0, must_queue = 1; unsigned long flags; @@ -439,7 +434,7 @@ out: spin_unlock_irqrestore(&m->lock, flags); if (init_required) - hwh->type->pg_init(hwh, pgpath->pg->bypassed, &pgpath->path); + queue_work(kmpath_handlerd, &m->activate_path); if (!must_queue) dispatch_queued_ios(m); @@ -652,8 +647,6 @@ static struct priority_group *parse_priority_group(struct arg_set *as, static int parse_hw_handler(struct arg_set *as, struct multipath *m) { - int r; - struct hw_handler_type *hwht; unsigned hw_argc; struct dm_target *ti = m->ti; @@ -661,30 +654,20 @@ static int parse_hw_handler(struct arg_set *as, struct multipath *m) {0, 1024, "invalid number of hardware handler args"}, }; - r = read_param(_params, shift(as), &hw_argc, &ti->error); - if (r) + if (read_param(_params, shift(as), &hw_argc, &ti->error)) return -EINVAL; if (!hw_argc) return 0; - hwht = dm_get_hw_handler(shift(as)); - if (!hwht) { + m->hw_handler_name = kstrdup(shift(as), GFP_KERNEL); + request_module("scsi_dh_%s", m->hw_handler_name); + if (scsi_dh_handler_exist(m->hw_handler_name) == 0) { ti->error = "unknown hardware handler type"; + kfree(m->hw_handler_name); + m->hw_handler_name = NULL; return -EINVAL; } - - m->hw_handler.md = dm_table_get_md(ti->table); - dm_put(m->hw_handler.md); - - r = hwht->create(&m->hw_handler, hw_argc - 1, as->argv); - if (r) { - dm_put_hw_handler(hwht); - ti->error = "hardware handler constructor failed"; - return r; - } - - m->hw_handler.type = hwht; consume(as, hw_argc - 1); return 0; @@ -808,6 +791,7 @@ static void multipath_dtr(struct dm_target *ti) { struct multipath *m = (struct multipath *) ti->private; + flush_workqueue(kmpath_handlerd); flush_workqueue(kmultipathd); free_multipath(m); } @@ -1025,52 +1009,85 @@ static int pg_init_limit_reached(struct multipath *m, struct pgpath *pgpath) return limit_reached; } -/* - * pg_init must call this when it has completed its initialisation - */ -void dm_pg_init_complete(struct dm_path *path, unsigned err_flags) +static void pg_init_done(struct dm_path *path, int errors) { struct pgpath *pgpath = path_to_pgpath(path); struct priority_group *pg = pgpath->pg; struct multipath *m = pg->m; unsigned long flags; - /* - * If requested, retry pg_init until maximum number of retries exceeded. - * If retry not requested and PG already bypassed, always fail the path. - */ - if (err_flags & MP_RETRY) { - if (pg_init_limit_reached(m, pgpath)) - err_flags |= MP_FAIL_PATH; - } else if (err_flags && pg->bypassed) - err_flags |= MP_FAIL_PATH; - - if (err_flags & MP_FAIL_PATH) + /* device or driver problems */ + switch (errors) { + case SCSI_DH_OK: + break; + case SCSI_DH_NOSYS: + if (!m->hw_handler_name) { + errors = 0; + break; + } + DMERR("Cannot failover device because scsi_dh_%s was not " + "loaded.", m->hw_handler_name); + /* + * Fail path for now, so we do not ping pong + */ fail_path(pgpath); - - if (err_flags & MP_BYPASS_PG) + break; + case SCSI_DH_DEV_TEMP_BUSY: + /* + * Probably doing something like FW upgrade on the + * controller so try the other pg. + */ bypass_pg(m, pg, 1); + break; + /* TODO: For SCSI_DH_RETRY we should wait a couple seconds */ + case SCSI_DH_RETRY: + case SCSI_DH_IMM_RETRY: + case SCSI_DH_RES_TEMP_UNAVAIL: + if (pg_init_limit_reached(m, pgpath)) + fail_path(pgpath); + errors = 0; + break; + default: + /* + * We probably do not want to fail the path for a device + * error, but this is what the old dm did. In future + * patches we can do more advanced handling. + */ + fail_path(pgpath); + } spin_lock_irqsave(&m->lock, flags); - if (err_flags & ~MP_RETRY) { + if (errors) { + DMERR("Could not failover device. Error %d.", errors); m->current_pgpath = NULL; m->current_pg = NULL; - } else if (!m->pg_init_required) + } else if (!m->pg_init_required) { m->queue_io = 0; + pg->bypassed = 0; + } m->pg_init_in_progress = 0; queue_work(kmultipathd, &m->process_queued_ios); spin_unlock_irqrestore(&m->lock, flags); } +static void activate_path(struct work_struct *work) +{ + int ret; + struct multipath *m = + container_of(work, struct multipath, activate_path); + struct dm_path *path = &m->current_pgpath->path; + + ret = scsi_dh_activate(bdev_get_queue(path->dev->bdev)); + pg_init_done(path, ret); +} + /* * end_io handling */ static int do_end_io(struct multipath *m, struct bio *bio, int error, struct dm_mpath_io *mpio) { - struct hw_handler *hwh = &m->hw_handler; - unsigned err_flags = MP_FAIL_PATH; /* Default behavior */ unsigned long flags; if (!error) @@ -1097,19 +1114,8 @@ static int do_end_io(struct multipath *m, struct bio *bio, } spin_unlock_irqrestore(&m->lock, flags); - if (hwh->type && hwh->type->error) - err_flags = hwh->type->error(hwh, bio); - - if (mpio->pgpath) { - if (err_flags & MP_FAIL_PATH) - fail_path(mpio->pgpath); - - if (err_flags & MP_BYPASS_PG) - bypass_pg(m, mpio->pgpath->pg, 1); - } - - if (err_flags & MP_ERROR_IO) - return -EIO; + if (mpio->pgpath) + fail_path(mpio->pgpath); requeue: dm_bio_restore(&mpio->details, bio); @@ -1194,7 +1200,6 @@ static int multipath_status(struct dm_target *ti, status_type_t type, int sz = 0; unsigned long flags; struct multipath *m = (struct multipath *) ti->private; - struct hw_handler *hwh = &m->hw_handler; struct priority_group *pg; struct pgpath *p; unsigned pg_num; @@ -1214,12 +1219,10 @@ static int multipath_status(struct dm_target *ti, status_type_t type, DMEMIT("pg_init_retries %u ", m->pg_init_retries); } - if (hwh->type && hwh->type->status) - sz += hwh->type->status(hwh, type, result + sz, maxlen - sz); - else if (!hwh->type || type == STATUSTYPE_INFO) + if (!m->hw_handler_name || type == STATUSTYPE_INFO) DMEMIT("0 "); else - DMEMIT("1 %s ", hwh->type->name); + DMEMIT("1 %s ", m->hw_handler_name); DMEMIT("%u ", m->nr_priority_groups); @@ -1422,6 +1425,21 @@ static int __init dm_multipath_init(void) return -ENOMEM; } + /* + * A separate workqueue is used to handle the device handlers + * to avoid overloading existing workqueue. Overloading the + * old workqueue would also create a bottleneck in the + * path of the storage hardware device activation. + */ + kmpath_handlerd = create_singlethread_workqueue("kmpath_handlerd"); + if (!kmpath_handlerd) { + DMERR("failed to create workqueue kmpath_handlerd"); + destroy_workqueue(kmultipathd); + dm_unregister_target(&multipath_target); + kmem_cache_destroy(_mpio_cache); + return -ENOMEM; + } + DMINFO("version %u.%u.%u loaded", multipath_target.version[0], multipath_target.version[1], multipath_target.version[2]); @@ -1433,6 +1451,7 @@ static void __exit dm_multipath_exit(void) { int r; + destroy_workqueue(kmpath_handlerd); destroy_workqueue(kmultipathd); r = dm_unregister_target(&multipath_target); @@ -1441,8 +1460,6 @@ static void __exit dm_multipath_exit(void) kmem_cache_destroy(_mpio_cache); } -EXPORT_SYMBOL_GPL(dm_pg_init_complete); - module_init(dm_multipath_init); module_exit(dm_multipath_exit); diff --git a/drivers/md/dm-mpath.h b/drivers/md/dm-mpath.h index b9cdcbb..c198b85 100644 --- a/drivers/md/dm-mpath.h +++ b/drivers/md/dm-mpath.h @@ -16,7 +16,6 @@ struct dm_path { unsigned is_active; /* Read-only */ void *pscontext; /* For path-selector use */ - void *hwhcontext; /* For hw-handler use */ }; /* Callback for hwh_pg_init_fn to use when complete */ diff --git a/drivers/message/fusion/lsi/mpi.h b/drivers/message/fusion/lsi/mpi.h index 1acbdd61..10b6ef7 100644 --- a/drivers/message/fusion/lsi/mpi.h +++ b/drivers/message/fusion/lsi/mpi.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2007 LSI Corporation. + * Copyright (c) 2000-2008 LSI Corporation. * * * Name: mpi.h diff --git a/drivers/message/fusion/lsi/mpi_cnfg.h b/drivers/message/fusion/lsi/mpi_cnfg.h index 2bd8ada..b2db333 100644 --- a/drivers/message/fusion/lsi/mpi_cnfg.h +++ b/drivers/message/fusion/lsi/mpi_cnfg.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2007 LSI Corporation. + * Copyright (c) 2000-2008 LSI Corporation. * * * Name: mpi_cnfg.h diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c index d40d6d1..75e599b 100644 --- a/drivers/message/fusion/mptbase.c +++ b/drivers/message/fusion/mptbase.c @@ -5,7 +5,7 @@ * For use with LSI PCI chip/adapter(s) * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ @@ -103,7 +103,7 @@ static int mfcounter = 0; * Public data... */ -struct proc_dir_entry *mpt_proc_root_dir; +static struct proc_dir_entry *mpt_proc_root_dir; #define WHOINIT_UNKNOWN 0xAA @@ -253,6 +253,55 @@ mpt_get_cb_idx(MPT_DRIVER_CLASS dclass) return 0; } +/** + * mpt_fault_reset_work - work performed on workq after ioc fault + * @work: input argument, used to derive ioc + * +**/ +static void +mpt_fault_reset_work(struct work_struct *work) +{ + MPT_ADAPTER *ioc = + container_of(work, MPT_ADAPTER, fault_reset_work.work); + u32 ioc_raw_state; + int rc; + unsigned long flags; + + if (ioc->diagPending || !ioc->active) + goto out; + + ioc_raw_state = mpt_GetIocState(ioc, 0); + if ((ioc_raw_state & MPI_IOC_STATE_MASK) == MPI_IOC_STATE_FAULT) { + printk(MYIOC_s_WARN_FMT "IOC is in FAULT state (%04xh)!!!\n", + ioc->name, ioc_raw_state & MPI_DOORBELL_DATA_MASK); + printk(MYIOC_s_WARN_FMT "Issuing HardReset from %s!!\n", + ioc->name, __FUNCTION__); + rc = mpt_HardResetHandler(ioc, CAN_SLEEP); + printk(MYIOC_s_WARN_FMT "%s: HardReset: %s\n", ioc->name, + __FUNCTION__, (rc == 0) ? "success" : "failed"); + ioc_raw_state = mpt_GetIocState(ioc, 0); + if ((ioc_raw_state & MPI_IOC_STATE_MASK) == MPI_IOC_STATE_FAULT) + printk(MYIOC_s_WARN_FMT "IOC is in FAULT state after " + "reset (%04xh)\n", ioc->name, ioc_raw_state & + MPI_DOORBELL_DATA_MASK); + } + + out: + /* + * Take turns polling alternate controller + */ + if (ioc->alt_ioc) + ioc = ioc->alt_ioc; + + /* rearm the timer */ + spin_lock_irqsave(&ioc->fault_reset_work_lock, flags); + if (ioc->reset_work_q) + queue_delayed_work(ioc->reset_work_q, &ioc->fault_reset_work, + msecs_to_jiffies(MPT_POLLING_INTERVAL)); + spin_unlock_irqrestore(&ioc->fault_reset_work_lock, flags); +} + + /* * Process turbo (context) reply... */ @@ -1616,6 +1665,22 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id) /* Find lookup slot. */ INIT_LIST_HEAD(&ioc->list); + + /* Initialize workqueue */ + INIT_DELAYED_WORK(&ioc->fault_reset_work, mpt_fault_reset_work); + spin_lock_init(&ioc->fault_reset_work_lock); + + snprintf(ioc->reset_work_q_name, KOBJ_NAME_LEN, "mpt_poll_%d", ioc->id); + ioc->reset_work_q = + create_singlethread_workqueue(ioc->reset_work_q_name); + if (!ioc->reset_work_q) { + printk(MYIOC_s_ERR_FMT "Insufficient memory to add adapter!\n", + ioc->name); + pci_release_selected_regions(pdev, ioc->bars); + kfree(ioc); + return -ENOMEM; + } + dinitprintk(ioc, printk(MYIOC_s_INFO_FMT "facts @ %p, pfacts[0] @ %p\n", ioc->name, &ioc->facts, &ioc->pfacts[0])); @@ -1727,6 +1792,10 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id) iounmap(ioc->memmap); if (r != -5) pci_release_selected_regions(pdev, ioc->bars); + + destroy_workqueue(ioc->reset_work_q); + ioc->reset_work_q = NULL; + kfree(ioc); pci_set_drvdata(pdev, NULL); return r; @@ -1759,6 +1828,10 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id) } #endif + if (!ioc->alt_ioc) + queue_delayed_work(ioc->reset_work_q, &ioc->fault_reset_work, + msecs_to_jiffies(MPT_POLLING_INTERVAL)); + return 0; } @@ -1774,6 +1847,19 @@ mpt_detach(struct pci_dev *pdev) MPT_ADAPTER *ioc = pci_get_drvdata(pdev); char pname[32]; u8 cb_idx; + unsigned long flags; + struct workqueue_struct *wq; + + /* + * Stop polling ioc for fault condition + */ + spin_lock_irqsave(&ioc->fault_reset_work_lock, flags); + wq = ioc->reset_work_q; + ioc->reset_work_q = NULL; + spin_unlock_irqrestore(&ioc->fault_reset_work_lock, flags); + cancel_delayed_work(&ioc->fault_reset_work); + destroy_workqueue(wq); + sprintf(pname, MPT_PROCFS_MPTBASEDIR "/%s/summary", ioc->name); remove_proc_entry(pname, NULL); @@ -7456,7 +7542,6 @@ EXPORT_SYMBOL(mpt_resume); EXPORT_SYMBOL(mpt_suspend); #endif EXPORT_SYMBOL(ioc_list); -EXPORT_SYMBOL(mpt_proc_root_dir); EXPORT_SYMBOL(mpt_register); EXPORT_SYMBOL(mpt_deregister); EXPORT_SYMBOL(mpt_event_register); diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h index a8f6174..6adab64 100644 --- a/drivers/message/fusion/mptbase.h +++ b/drivers/message/fusion/mptbase.h @@ -5,7 +5,7 @@ * LSIFC9xx/LSI409xx Fibre Channel * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ @@ -73,11 +73,11 @@ #endif #ifndef COPYRIGHT -#define COPYRIGHT "Copyright (c) 1999-2007 " MODULEAUTHOR +#define COPYRIGHT "Copyright (c) 1999-2008 " MODULEAUTHOR #endif -#define MPT_LINUX_VERSION_COMMON "3.04.06" -#define MPT_LINUX_PACKAGE_NAME "@(#)mptlinux-3.04.06" +#define MPT_LINUX_VERSION_COMMON "3.04.07" +#define MPT_LINUX_PACKAGE_NAME "@(#)mptlinux-3.04.07" #define WHAT_MAGIC_STRING "@" "(" "#" ")" #define show_mptmod_ver(s,ver) \ @@ -176,6 +176,8 @@ /* debug print string length used for events and iocstatus */ # define EVENT_DESCR_STR_SZ 100 +#define MPT_POLLING_INTERVAL 1000 /* in milliseconds */ + #ifdef __KERNEL__ /* { */ /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ @@ -709,6 +711,12 @@ typedef struct _MPT_ADAPTER struct workqueue_struct *fc_rescan_work_q; struct scsi_cmnd **ScsiLookup; spinlock_t scsi_lookup_lock; + + char reset_work_q_name[KOBJ_NAME_LEN]; + struct workqueue_struct *reset_work_q; + struct delayed_work fault_reset_work; + spinlock_t fault_reset_work_lock; + } MPT_ADAPTER; /* @@ -919,7 +927,6 @@ extern int mpt_raid_phys_disk_pg0(MPT_ADAPTER *ioc, u8 phys_disk_num, pRaidPhys * Public data decl's... */ extern struct list_head ioc_list; -extern struct proc_dir_entry *mpt_proc_root_dir; /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ #endif /* } __KERNEL__ */ diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c index c594656..a592042 100644 --- a/drivers/message/fusion/mptctl.c +++ b/drivers/message/fusion/mptctl.c @@ -4,7 +4,7 @@ * For use with LSI PCI chip/adapters * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ @@ -66,7 +66,7 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> -#define COPYRIGHT "Copyright (c) 1999-2007 LSI Corporation" +#define COPYRIGHT "Copyright (c) 1999-2008 LSI Corporation" #define MODULEAUTHOR "LSI Corporation" #include "mptbase.h" #include "mptctl.h" diff --git a/drivers/message/fusion/mptctl.h b/drivers/message/fusion/mptctl.h index 2c18901..d564cc9 100644 --- a/drivers/message/fusion/mptctl.h +++ b/drivers/message/fusion/mptctl.h @@ -5,7 +5,7 @@ * LSIFC9xx/LSI409xx Fibre Channel * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptdebug.h b/drivers/message/fusion/mptdebug.h index ffdb0a6..510b9f4 100644 --- a/drivers/message/fusion/mptdebug.h +++ b/drivers/message/fusion/mptdebug.h @@ -3,7 +3,7 @@ * For use with LSI PCI chip/adapter(s) * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c index 1e24ab4..fc31ca6 100644 --- a/drivers/message/fusion/mptfc.c +++ b/drivers/message/fusion/mptfc.c @@ -3,7 +3,7 @@ * For use with LSI PCI chip/adapter(s) * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c index 7950fc67..d709d92 100644 --- a/drivers/message/fusion/mptlan.c +++ b/drivers/message/fusion/mptlan.c @@ -4,7 +4,7 @@ * For use with LSI Fibre Channel PCI chip/adapters * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 2000-2007 LSI Corporation + * Copyright (c) 2000-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptlan.h b/drivers/message/fusion/mptlan.h index bafb67f..33927ee 100644 --- a/drivers/message/fusion/mptlan.h +++ b/drivers/message/fusion/mptlan.h @@ -4,7 +4,7 @@ * For use with LSI Fibre Channel PCI chip/adapters * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 2000-2007 LSI Corporation + * Copyright (c) 2000-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c index 4d492ba..b1147aa 100644 --- a/drivers/message/fusion/mptsas.c +++ b/drivers/message/fusion/mptsas.c @@ -3,7 +3,7 @@ * For use with LSI PCI chip/adapter(s) * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) */ /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ diff --git a/drivers/message/fusion/mptsas.h b/drivers/message/fusion/mptsas.h index 7c150f5..2b544e0 100644 --- a/drivers/message/fusion/mptsas.h +++ b/drivers/message/fusion/mptsas.h @@ -5,7 +5,7 @@ * LSIFC9xx/LSI409xx Fibre Channel * running LSI MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c index c68ef00..d142b6b 100644 --- a/drivers/message/fusion/mptscsih.c +++ b/drivers/message/fusion/mptscsih.c @@ -3,7 +3,7 @@ * For use with LSI PCI chip/adapter(s) * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptscsih.h b/drivers/message/fusion/mptscsih.h index 7ea7da0..319aa30 100644 --- a/drivers/message/fusion/mptscsih.h +++ b/drivers/message/fusion/mptscsih.h @@ -5,7 +5,7 @@ * LSIFC9xx/LSI409xx Fibre Channel * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c index 1effca4..6162014 100644 --- a/drivers/message/fusion/mptspi.c +++ b/drivers/message/fusion/mptspi.c @@ -3,7 +3,7 @@ * For use with LSI PCI chip/adapter(s) * running LSI Fusion MPT (Message Passing Technology) firmware. * - * Copyright (c) 1999-2007 LSI Corporation + * Copyright (c) 1999-2008 LSI Corporation * (mailto:DL-MPTFusionLinux@lsi.com) * */ @@ -447,6 +447,7 @@ static int mptspi_target_alloc(struct scsi_target *starget) spi_max_offset(starget) = ioc->spi_data.maxSyncOffset; spi_offset(starget) = 0; + spi_period(starget) = 0xFF; mptspi_write_width(starget, 0); return 0; diff --git a/drivers/s390/scsi/Makefile b/drivers/s390/scsi/Makefile index d6a78f1..cb301cc 100644 --- a/drivers/s390/scsi/Makefile +++ b/drivers/s390/scsi/Makefile @@ -3,7 +3,6 @@ # zfcp-objs := zfcp_aux.o zfcp_ccw.o zfcp_scsi.o zfcp_erp.o zfcp_qdio.o \ - zfcp_fsf.o zfcp_dbf.o zfcp_sysfs_adapter.o zfcp_sysfs_port.o \ - zfcp_sysfs_unit.o zfcp_sysfs_driver.o + zfcp_fsf.o zfcp_dbf.o zfcp_sysfs.o zfcp_fc.o zfcp_cfdc.o obj-$(CONFIG_ZFCP) += zfcp.o diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 8c7e2b7..90abfd0 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Module interface and handling of zfcp data structures. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ /* @@ -31,93 +18,25 @@ * Maxim Shchetynin * Volker Sameske * Ralph Wuerthner + * Michael Loehr + * Swen Schillig + * Christof Schmitt + * Martin Petermann + * Sven Schuetz */ +#include <linux/miscdevice.h> #include "zfcp_ext.h" -/* accumulated log level (module parameter) */ -static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS; static char *device; -/*********************** FUNCTION PROTOTYPES *********************************/ - -/* written against the module interface */ -static int __init zfcp_module_init(void); - -/* FCP related */ -static void zfcp_ns_gid_pn_handler(unsigned long); - -/* miscellaneous */ -static int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t); -static void zfcp_sg_list_free(struct zfcp_sg_list *); -static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *, - void __user *, size_t); -static int zfcp_sg_list_copy_to_user(void __user *, - struct zfcp_sg_list *, size_t); -static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long); - -#define ZFCP_CFDC_IOC_MAGIC 0xDD -#define ZFCP_CFDC_IOC \ - _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data) - - -static const struct file_operations zfcp_cfdc_fops = { - .unlocked_ioctl = zfcp_cfdc_dev_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = zfcp_cfdc_dev_ioctl -#endif -}; - -static struct miscdevice zfcp_cfdc_misc = { - .minor = ZFCP_CFDC_DEV_MINOR, - .name = ZFCP_CFDC_DEV_NAME, - .fops = &zfcp_cfdc_fops -}; - -/*********************** KERNEL/MODULE PARAMETERS ***************************/ - -/* declare driver module init/cleanup functions */ -module_init(zfcp_module_init); MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); -MODULE_DESCRIPTION - ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries"); +MODULE_DESCRIPTION("FCP HBA driver"); MODULE_LICENSE("GPL"); module_param(device, charp, 0400); MODULE_PARM_DESC(device, "specify initial device"); -module_param(loglevel, uint, 0400); -MODULE_PARM_DESC(loglevel, - "log levels, 8 nibbles: " - "FC ERP QDIO CIO Config FSF SCSI Other, " - "levels: 0=none 1=normal 2=devel 3=trace"); - -/****************************************************************/ -/************** Functions without logging ***********************/ -/****************************************************************/ - -void -_zfcp_hex_dump(char *addr, int count) -{ - int i; - for (i = 0; i < count; i++) { - printk("%02x", addr[i]); - if ((i % 4) == 3) - printk(" "); - if ((i % 32) == 31) - printk("\n"); - } - if (((i-1) % 32) != 31) - printk("\n"); -} - - -/****************************************************************/ -/****** Functions to handle the request ID hash table ********/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF - static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) { int idx; @@ -132,11 +51,12 @@ static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) return 0; } -static void zfcp_reqlist_free(struct zfcp_adapter *adapter) -{ - kfree(adapter->req_list); -} - +/** + * zfcp_reqlist_isempty - is the request list empty + * @adapter: pointer to struct zfcp_adapter + * + * Returns: true if list is empty, false otherwise + */ int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) { unsigned int idx; @@ -147,62 +67,58 @@ int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) return 1; } -#undef ZFCP_LOG_AREA - -/****************************************************************/ -/************** Uncategorised Functions *************************/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER - -/** - * zfcp_device_setup - setup function - * @str: pointer to parameter string - * - * Parse "device=..." parameter string. - */ -static int __init -zfcp_device_setup(char *devstr) +static int __init zfcp_device_setup(char *devstr) { - char *tmp, *str; - size_t len; + char *token; + char *str; if (!devstr) return 0; - len = strlen(devstr) + 1; - str = kmalloc(len, GFP_KERNEL); + /* duplicate devstr and keep the original for sysfs presentation*/ + str = kmalloc(strlen(devstr) + 1, GFP_KERNEL); if (!str) - goto err_out; - memcpy(str, devstr, len); + return 0; - tmp = strchr(str, ','); - if (!tmp) - goto err_out; - *tmp++ = '\0'; - strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE); - zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0'; + strcpy(str, devstr); - zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0); - if (*tmp++ != ',') + token = strsep(&str, ","); + if (!token || strlen(token) >= BUS_ID_SIZE) goto err_out; - if (*tmp == '\0') + strncpy(zfcp_data.init_busid, token, BUS_ID_SIZE); + + token = strsep(&str, ","); + if (!token || strict_strtoull(token, 0, &zfcp_data.init_wwpn)) goto err_out; - zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0); - if (*tmp != '\0') + token = strsep(&str, ","); + if (!token || strict_strtoull(token, 0, &zfcp_data.init_fcp_lun)) goto err_out; + kfree(str); return 1; err_out: - ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str); kfree(str); + pr_err("zfcp: Parse error for device parameter string %s, " + "device not attached.\n", devstr); return 0; } -static void __init -zfcp_init_device_configure(void) +static struct zfcp_adapter *zfcp_get_adapter_by_busid(char *bus_id) +{ + struct zfcp_adapter *adapter; + + list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) + if ((strncmp(bus_id, adapter->ccw_device->dev.bus_id, + BUS_ID_SIZE) == 0) && + !(atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_REMOVE)) + return adapter; + return NULL; +} + +static void __init zfcp_init_device_configure(void) { struct zfcp_adapter *adapter; struct zfcp_port *port; @@ -215,101 +131,75 @@ zfcp_init_device_configure(void) zfcp_adapter_get(adapter); read_unlock_irq(&zfcp_data.config_lock); - if (adapter == NULL) + if (!adapter) goto out_adapter; port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0); - if (!port) + if (IS_ERR(port)) goto out_port; unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun); - if (!unit) + if (IS_ERR(unit)) goto out_unit; up(&zfcp_data.config_sema); ccw_device_set_online(adapter->ccw_device); zfcp_erp_wait(adapter); down(&zfcp_data.config_sema); zfcp_unit_put(unit); - out_unit: +out_unit: zfcp_port_put(port); - out_port: +out_port: zfcp_adapter_put(adapter); - out_adapter: +out_adapter: up(&zfcp_data.config_sema); return; } -static int calc_alignment(int size) +static struct kmem_cache *zfcp_cache_create(int size, char *name) { int align = 1; - - if (!size) - return 0; - while ((size - align) > 0) align <<= 1; - - return align; + return kmem_cache_create(name , size, align, 0, NULL); } -static int __init -zfcp_module_init(void) +static int __init zfcp_module_init(void) { int retval = -ENOMEM; - int size, align; - size = sizeof(struct zfcp_fsf_req_qtcb); - align = calc_alignment(size); - zfcp_data.fsf_req_qtcb_cache = - kmem_cache_create("zfcp_fsf", size, align, 0, NULL); + zfcp_data.fsf_req_qtcb_cache = zfcp_cache_create( + sizeof(struct zfcp_fsf_req_qtcb), "zfcp_fsf"); if (!zfcp_data.fsf_req_qtcb_cache) goto out; - size = sizeof(struct fsf_status_read_buffer); - align = calc_alignment(size); - zfcp_data.sr_buffer_cache = - kmem_cache_create("zfcp_sr", size, align, 0, NULL); + zfcp_data.sr_buffer_cache = zfcp_cache_create( + sizeof(struct fsf_status_read_buffer), "zfcp_sr"); if (!zfcp_data.sr_buffer_cache) goto out_sr_cache; - size = sizeof(struct zfcp_gid_pn_data); - align = calc_alignment(size); - zfcp_data.gid_pn_cache = - kmem_cache_create("zfcp_gid", size, align, 0, NULL); + zfcp_data.gid_pn_cache = zfcp_cache_create( + sizeof(struct zfcp_gid_pn_data), "zfcp_gid"); if (!zfcp_data.gid_pn_cache) goto out_gid_cache; - atomic_set(&zfcp_data.loglevel, loglevel); - - /* initialize adapter list */ INIT_LIST_HEAD(&zfcp_data.adapter_list_head); - - /* initialize adapters to be removed list head */ INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh); + sema_init(&zfcp_data.config_sema, 1); + rwlock_init(&zfcp_data.config_lock); + zfcp_data.scsi_transport_template = fc_attach_transport(&zfcp_transport_functions); if (!zfcp_data.scsi_transport_template) goto out_transport; retval = misc_register(&zfcp_cfdc_misc); - if (retval != 0) { - ZFCP_LOG_INFO("registration of misc device " - "zfcp_cfdc failed\n"); + if (retval) { + pr_err("zfcp: registration of misc device zfcp_cfdc failed\n"); goto out_misc; } - ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n", - ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor); - - /* Initialise proc semaphores */ - sema_init(&zfcp_data.config_sema, 1); - - /* initialise configuration rw lock */ - rwlock_init(&zfcp_data.config_lock); - - /* setup dynamic I/O */ retval = zfcp_ccw_register(); if (retval) { - ZFCP_LOG_NORMAL("registration with common I/O layer failed\n"); + pr_err("zfcp: Registration with common I/O layer failed.\n"); goto out_ccw_register; } @@ -318,527 +208,88 @@ zfcp_module_init(void) goto out; - out_ccw_register: +out_ccw_register: misc_deregister(&zfcp_cfdc_misc); - out_misc: +out_misc: fc_release_transport(zfcp_data.scsi_transport_template); - out_transport: +out_transport: kmem_cache_destroy(zfcp_data.gid_pn_cache); - out_gid_cache: +out_gid_cache: kmem_cache_destroy(zfcp_data.sr_buffer_cache); - out_sr_cache: +out_sr_cache: kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache); - out: +out: return retval; } -/* - * function: zfcp_cfdc_dev_ioctl - * - * purpose: Handle control file upload/download transaction via IOCTL - * interface - * - * returns: 0 - Operation completed successfuly - * -ENOTTY - Unknown IOCTL command - * -EINVAL - Invalid sense data record - * -ENXIO - The FCP adapter is not available - * -EOPNOTSUPP - The FCP adapter does not have CFDC support - * -ENOMEM - Insufficient memory - * -EFAULT - User space memory I/O operation fault - * -EPERM - Cannot create or queue FSF request or create SBALs - * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS) - */ -static long -zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, - unsigned long buffer) -{ - struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user; - struct zfcp_adapter *adapter = NULL; - struct zfcp_fsf_req *fsf_req = NULL; - struct zfcp_sg_list *sg_list = NULL; - u32 fsf_command, option; - char *bus_id = NULL; - int retval = 0; - - sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL); - if (sense_data == NULL) { - retval = -ENOMEM; - goto out; - } - - sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); - if (sg_list == NULL) { - retval = -ENOMEM; - goto out; - } - - if (command != ZFCP_CFDC_IOC) { - ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command); - retval = -ENOTTY; - goto out; - } - - if ((sense_data_user = (void __user *) buffer) == NULL) { - ZFCP_LOG_INFO("sense data record is required\n"); - retval = -EINVAL; - goto out; - } - - retval = copy_from_user(sense_data, sense_data_user, - sizeof(struct zfcp_cfdc_sense_data)); - if (retval) { - retval = -EFAULT; - goto out; - } - - if (sense_data->signature != ZFCP_CFDC_SIGNATURE) { - ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n", - ZFCP_CFDC_SIGNATURE); - retval = -EINVAL; - goto out; - } - - switch (sense_data->command) { - - case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_NORMAL_MODE; - break; - - case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_FORCE; - break; - - case ZFCP_CFDC_CMND_FULL_ACCESS: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_FULL_ACCESS; - break; - - case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: - fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; - option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; - break; - - case ZFCP_CFDC_CMND_UPLOAD: - fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE; - option = 0; - break; - - default: - ZFCP_LOG_INFO("invalid command code 0x%08x\n", - sense_data->command); - retval = -EINVAL; - goto out; - } - - bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL); - if (bus_id == NULL) { - retval = -ENOMEM; - goto out; - } - snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x", - (sense_data->devno >> 24), - (sense_data->devno >> 16) & 0xFF, - (sense_data->devno & 0xFFFF)); - - read_lock_irq(&zfcp_data.config_lock); - adapter = zfcp_get_adapter_by_busid(bus_id); - if (adapter) - zfcp_adapter_get(adapter); - read_unlock_irq(&zfcp_data.config_lock); - - kfree(bus_id); - - if (adapter == NULL) { - ZFCP_LOG_INFO("invalid adapter\n"); - retval = -ENXIO; - goto out; - } - - if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) { - retval = zfcp_sg_list_alloc(sg_list, - ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); - if (retval) { - retval = -ENOMEM; - goto out; - } - } - - if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) && - (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) { - retval = zfcp_sg_list_copy_from_user( - sg_list, &sense_data_user->control_file, - ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); - if (retval) { - retval = -EFAULT; - goto out; - } - } - - retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command, - option, sg_list); - if (retval) - goto out; - - if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) && - (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { - retval = -ENXIO; - goto out; - } - - sense_data->fsf_status = fsf_req->qtcb->header.fsf_status; - memcpy(&sense_data->fsf_status_qual, - &fsf_req->qtcb->header.fsf_status_qual, - sizeof(union fsf_status_qual)); - memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256); - - retval = copy_to_user(sense_data_user, sense_data, - sizeof(struct zfcp_cfdc_sense_data)); - if (retval) { - retval = -EFAULT; - goto out; - } - - if (sense_data->command & ZFCP_CFDC_UPLOAD) { - retval = zfcp_sg_list_copy_to_user( - &sense_data_user->control_file, sg_list, - ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); - if (retval) { - retval = -EFAULT; - goto out; - } - } - - out: - if (fsf_req != NULL) - zfcp_fsf_req_free(fsf_req); - - if ((adapter != NULL) && (retval != -ENXIO)) - zfcp_adapter_put(adapter); - - if (sg_list != NULL) { - zfcp_sg_list_free(sg_list); - kfree(sg_list); - } - - kfree(sense_data); - - return retval; -} - - -/** - * zfcp_sg_list_alloc - create a scatter-gather list of the specified size - * @sg_list: structure describing a scatter gather list - * @size: size of scatter-gather list - * Return: 0 on success, else -ENOMEM - * - * In sg_list->sg a pointer to the created scatter-gather list is returned, - * or NULL if we run out of memory. sg_list->count specifies the number of - * elements of the scatter-gather list. The maximum size of a single element - * in the scatter-gather list is PAGE_SIZE. - */ -static int -zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size) -{ - struct scatterlist *sg; - unsigned int i; - int retval = 0; - void *address; - - BUG_ON(sg_list == NULL); - - sg_list->count = size >> PAGE_SHIFT; - if (size & ~PAGE_MASK) - sg_list->count++; - sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist), - GFP_KERNEL); - if (sg_list->sg == NULL) { - sg_list->count = 0; - retval = -ENOMEM; - goto out; - } - sg_init_table(sg_list->sg, sg_list->count); - - for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) { - address = (void *) get_zeroed_page(GFP_KERNEL); - if (address == NULL) { - sg_list->count = i; - zfcp_sg_list_free(sg_list); - retval = -ENOMEM; - goto out; - } - zfcp_address_to_sg(address, sg, min(size, PAGE_SIZE)); - size -= sg->length; - } - - out: - return retval; -} - - -/** - * zfcp_sg_list_free - free memory of a scatter-gather list - * @sg_list: structure describing a scatter-gather list - * - * Memory for each element in the scatter-gather list is freed. - * Finally sg_list->sg is freed itself and sg_list->count is reset. - */ -static void -zfcp_sg_list_free(struct zfcp_sg_list *sg_list) -{ - struct scatterlist *sg; - unsigned int i; - - BUG_ON(sg_list == NULL); - - for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) - free_page((unsigned long) zfcp_sg_to_address(sg)); - - sg_list->count = 0; - kfree(sg_list->sg); -} - -/** - * zfcp_sg_size - determine size of a scatter-gather list - * @sg: array of (struct scatterlist) - * @sg_count: elements in array - * Return: size of entire scatter-gather list - */ -static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count) -{ - unsigned int i; - struct scatterlist *p; - size_t size; - - size = 0; - for (i = 0, p = sg; i < sg_count; i++, p++) { - BUG_ON(p == NULL); - size += p->length; - } - - return size; -} - - -/** - * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list - * @sg_list: structure describing a scatter-gather list - * @user_buffer: pointer to buffer in user space - * @size: number of bytes to be copied - * Return: 0 on success, -EFAULT if copy_from_user fails. - */ -static int -zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list, - void __user *user_buffer, - size_t size) -{ - struct scatterlist *sg; - unsigned int length; - void *zfcp_buffer; - int retval = 0; - - BUG_ON(sg_list == NULL); - - if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) - return -EFAULT; - - for (sg = sg_list->sg; size > 0; sg++) { - length = min((unsigned int)size, sg->length); - zfcp_buffer = zfcp_sg_to_address(sg); - if (copy_from_user(zfcp_buffer, user_buffer, length)) { - retval = -EFAULT; - goto out; - } - user_buffer += length; - size -= length; - } - - out: - return retval; -} - - -/** - * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space - * @user_buffer: pointer to buffer in user space - * @sg_list: structure describing a scatter-gather list - * @size: number of bytes to be copied - * Return: 0 on success, -EFAULT if copy_to_user fails - */ -static int -zfcp_sg_list_copy_to_user(void __user *user_buffer, - struct zfcp_sg_list *sg_list, - size_t size) -{ - struct scatterlist *sg; - unsigned int length; - void *zfcp_buffer; - int retval = 0; - - BUG_ON(sg_list == NULL); - - if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) - return -EFAULT; - - for (sg = sg_list->sg; size > 0; sg++) { - length = min((unsigned int) size, sg->length); - zfcp_buffer = zfcp_sg_to_address(sg); - if (copy_to_user(user_buffer, zfcp_buffer, length)) { - retval = -EFAULT; - goto out; - } - user_buffer += length; - size -= length; - } - - out: - return retval; -} - - -#undef ZFCP_LOG_AREA - -/****************************************************************/ -/****** Functions for configuration/set-up of structures ********/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG +module_init(zfcp_module_init); /** * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN * @port: pointer to port to search for unit * @fcp_lun: FCP LUN to search for - * Traverse list of all units of a port and return pointer to a unit - * with the given FCP LUN. + * + * Returns: pointer to zfcp_unit or NULL */ -struct zfcp_unit * -zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun) +struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, + fcp_lun_t fcp_lun) { struct zfcp_unit *unit; - int found = 0; - list_for_each_entry(unit, &port->unit_list_head, list) { + list_for_each_entry(unit, &port->unit_list_head, list) if ((unit->fcp_lun == fcp_lun) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) - { - found = 1; - break; - } - } - return found ? unit : NULL; + !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE)) + return unit; + return NULL; } /** * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn * @adapter: pointer to adapter to search for port * @wwpn: wwpn to search for - * Traverse list of all ports of an adapter and return pointer to a port - * with the given wwpn. - */ -struct zfcp_port * -zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn) -{ - struct zfcp_port *port; - int found = 0; - - list_for_each_entry(port, &adapter->port_list_head, list) { - if ((port->wwpn == wwpn) && - !(atomic_read(&port->status) & - (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) { - found = 1; - break; - } - } - return found ? port : NULL; -} - -/** - * zfcp_get_port_by_did - find port in port list of adapter by d_id - * @adapter: pointer to adapter to search for port - * @d_id: d_id to search for - * Traverse list of all ports of an adapter and return pointer to a port - * with the given d_id. + * + * Returns: pointer to zfcp_port or NULL */ -struct zfcp_port * -zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id) +struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, + wwn_t wwpn) { struct zfcp_port *port; - int found = 0; - list_for_each_entry(port, &adapter->port_list_head, list) { - if ((port->d_id == d_id) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) - { - found = 1; - break; - } - } - return found ? port : NULL; + list_for_each_entry(port, &adapter->port_list_head, list) + if ((port->wwpn == wwpn) && !(atomic_read(&port->status) & + (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) + return port; + return NULL; } -/** - * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id - * @bus_id: bus_id to search for - * Traverse list of all adapters and return pointer to an adapter - * with the given bus_id. - */ -struct zfcp_adapter * -zfcp_get_adapter_by_busid(char *bus_id) +static void zfcp_sysfs_unit_release(struct device *dev) { - struct zfcp_adapter *adapter; - int found = 0; - - list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) { - if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter), - BUS_ID_SIZE) == 0) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, - &adapter->status)){ - found = 1; - break; - } - } - return found ? adapter : NULL; + kfree(container_of(dev, struct zfcp_unit, sysfs_device)); } /** * zfcp_unit_enqueue - enqueue unit to unit list of a port. * @port: pointer to port where unit is added * @fcp_lun: FCP LUN of unit to be enqueued - * Return: pointer to enqueued unit on success, NULL on error + * Returns: pointer to enqueued unit on success, ERR_PTR on error * Locks: config_sema must be held to serialize changes to the unit list * * Sets up some unit internal structures and creates sysfs entry. */ -struct zfcp_unit * -zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) +struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) { struct zfcp_unit *unit; - /* - * check that there is no unit with this FCP_LUN already in list - * and enqueue it. - * Note: Unlike for the adapter and the port, this is an error - */ - read_lock_irq(&zfcp_data.config_lock); - unit = zfcp_get_unit_by_lun(port, fcp_lun); - read_unlock_irq(&zfcp_data.config_lock); - if (unit) - return NULL; - - unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL); + unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL); if (!unit) - return NULL; + return ERR_PTR(-ENOMEM); - /* initialise reference count stuff */ atomic_set(&unit->refcount, 0); init_waitqueue_head(&unit->remove_wq); unit->port = port; unit->fcp_lun = fcp_lun; - /* setup for sysfs registration */ snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun); unit->sysfs_device.parent = &port->sysfs_device; unit->sysfs_device.release = zfcp_sysfs_unit_release; @@ -847,14 +298,28 @@ zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) /* mark unit unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); - if (device_register(&unit->sysfs_device)) { - kfree(unit); - return NULL; + spin_lock_init(&unit->latencies.lock); + unit->latencies.write.channel.min = 0xFFFFFFFF; + unit->latencies.write.fabric.min = 0xFFFFFFFF; + unit->latencies.read.channel.min = 0xFFFFFFFF; + unit->latencies.read.fabric.min = 0xFFFFFFFF; + unit->latencies.cmd.channel.min = 0xFFFFFFFF; + unit->latencies.cmd.fabric.min = 0xFFFFFFFF; + + read_lock_irq(&zfcp_data.config_lock); + if (zfcp_get_unit_by_lun(port, fcp_lun)) { + read_unlock_irq(&zfcp_data.config_lock); + goto err_out_free; } + read_unlock_irq(&zfcp_data.config_lock); - if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) { + if (device_register(&unit->sysfs_device)) + goto err_out_free; + + if (sysfs_create_group(&unit->sysfs_device.kobj, + &zfcp_sysfs_unit_attrs)) { device_unregister(&unit->sysfs_device); - return NULL; + return ERR_PTR(-EIO); } zfcp_unit_get(unit); @@ -864,16 +329,27 @@ zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) list_add_tail(&unit->list, &port->unit_list_head); atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); + write_unlock_irq(&zfcp_data.config_lock); port->units++; zfcp_port_get(port); return unit; + +err_out_free: + kfree(unit); + return ERR_PTR(-EINVAL); } -void -zfcp_unit_dequeue(struct zfcp_unit *unit) +/** + * zfcp_unit_dequeue - dequeue unit + * @unit: pointer to zfcp_unit + * + * waits until all work is done on unit and removes it then from the unit->list + * of the associated port. + */ +void zfcp_unit_dequeue(struct zfcp_unit *unit) { zfcp_unit_wait(unit); write_lock_irq(&zfcp_data.config_lock); @@ -881,68 +357,51 @@ zfcp_unit_dequeue(struct zfcp_unit *unit) write_unlock_irq(&zfcp_data.config_lock); unit->port->units--; zfcp_port_put(unit->port); - zfcp_sysfs_unit_remove_files(&unit->sysfs_device); + sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs); device_unregister(&unit->sysfs_device); } -/* - * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI - * commands. - * It also genrates fcp-nameserver request/response buffer and unsolicited - * status read fsf_req buffers. - * - * locks: must only be called with zfcp_data.config_sema taken - */ -static int -zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) +static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) { + /* must only be called with zfcp_data.config_sema taken */ adapter->pool.fsf_req_erp = - mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR, - zfcp_data.fsf_req_qtcb_cache); + mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); if (!adapter->pool.fsf_req_erp) return -ENOMEM; adapter->pool.fsf_req_scsi = - mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR, - zfcp_data.fsf_req_qtcb_cache); + mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); if (!adapter->pool.fsf_req_scsi) return -ENOMEM; adapter->pool.fsf_req_abort = - mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR, - zfcp_data.fsf_req_qtcb_cache); + mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); if (!adapter->pool.fsf_req_abort) return -ENOMEM; adapter->pool.fsf_req_status_read = - mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR, + mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM, sizeof(struct zfcp_fsf_req)); if (!adapter->pool.fsf_req_status_read) return -ENOMEM; adapter->pool.data_status_read = - mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR, + mempool_create_slab_pool(FSF_STATUS_READS_RECOM, zfcp_data.sr_buffer_cache); if (!adapter->pool.data_status_read) return -ENOMEM; adapter->pool.data_gid_pn = - mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR, - zfcp_data.gid_pn_cache); + mempool_create_slab_pool(1, zfcp_data.gid_pn_cache); if (!adapter->pool.data_gid_pn) return -ENOMEM; return 0; } -/** - * zfcp_free_low_mem_buffers - free memory pools of an adapter - * @adapter: pointer to zfcp_adapter for which memory pools should be freed - * locking: zfcp_data.config_sema must be held - */ -static void -zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) +static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) { + /* zfcp_data.config_sema must be held */ if (adapter->pool.fsf_req_erp) mempool_destroy(adapter->pool.fsf_req_erp); if (adapter->pool.fsf_req_scsi) @@ -962,20 +421,61 @@ static void zfcp_dummy_release(struct device *dev) return; } -/* +/** + * zfcp_status_read_refill - refill the long running status_read_requests + * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled + * + * Returns: 0 on success, 1 otherwise + * + * if there are 16 or more status_read requests missing an adapter_reopen + * is triggered + */ +int zfcp_status_read_refill(struct zfcp_adapter *adapter) +{ + while (atomic_read(&adapter->stat_miss) > 0) + if (zfcp_fsf_status_read(adapter)) { + if (atomic_read(&adapter->stat_miss) >= 16) { + zfcp_erp_adapter_reopen(adapter, 0, 103, NULL); + return 1; + } + break; + } else + atomic_dec(&adapter->stat_miss); + return 0; +} + +static void _zfcp_status_read_scheduler(struct work_struct *work) +{ + zfcp_status_read_refill(container_of(work, struct zfcp_adapter, + stat_work)); +} + +static int zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; + + port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, + ZFCP_DID_DIRECTORY_SERVICE); + if (IS_ERR(port)) + return PTR_ERR(port); + zfcp_port_put(port); + + return 0; +} + +/** + * zfcp_adapter_enqueue - enqueue a new adapter to the list + * @ccw_device: pointer to the struct cc_device + * + * Returns: 0 if a new adapter was successfully enqueued + * -ENOMEM if alloc failed * Enqueues an adapter at the end of the adapter list in the driver data. * All adapter internal structures are set up. * Proc-fs entries are also created. - * - * returns: 0 if a new adapter was successfully enqueued - * ZFCP_KNOWN if an adapter with this devno was already present - * -ENOMEM if alloc failed * locks: config_sema must be held to serialise changes to the adapter list */ -struct zfcp_adapter * -zfcp_adapter_enqueue(struct ccw_device *ccw_device) +int zfcp_adapter_enqueue(struct ccw_device *ccw_device) { - int retval = 0; struct zfcp_adapter *adapter; /* @@ -983,85 +483,58 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) * are protected by the config_sema, which must be held to get here */ - /* try to allocate new adapter data structure (zeroed) */ - adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); - if (!adapter) { - ZFCP_LOG_INFO("error: allocation of base adapter " - "structure failed\n"); - goto out; - } + adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL); + if (!adapter) + return -ENOMEM; ccw_device->handler = NULL; - - /* save ccw_device pointer */ adapter->ccw_device = ccw_device; + atomic_set(&adapter->refcount, 0); - retval = zfcp_qdio_allocate_queues(adapter); - if (retval) - goto queues_alloc_failed; - - retval = zfcp_qdio_allocate(adapter); - if (retval) + if (zfcp_qdio_allocate(adapter)) goto qdio_allocate_failed; - retval = zfcp_allocate_low_mem_buffers(adapter); - if (retval) { - ZFCP_LOG_INFO("error: pool allocation failed\n"); + if (zfcp_allocate_low_mem_buffers(adapter)) goto failed_low_mem_buffers; - } - /* initialise reference count stuff */ - atomic_set(&adapter->refcount, 0); + if (zfcp_reqlist_alloc(adapter)) + goto failed_low_mem_buffers; + + if (zfcp_adapter_debug_register(adapter)) + goto debug_register_failed; + init_waitqueue_head(&adapter->remove_wq); + init_waitqueue_head(&adapter->erp_thread_wqh); + init_waitqueue_head(&adapter->erp_done_wqh); - /* initialise list of ports */ INIT_LIST_HEAD(&adapter->port_list_head); - - /* initialise list of ports to be removed */ INIT_LIST_HEAD(&adapter->port_remove_lh); + INIT_LIST_HEAD(&adapter->erp_ready_head); + INIT_LIST_HEAD(&adapter->erp_running_head); - /* initialize list of fsf requests */ spin_lock_init(&adapter->req_list_lock); - retval = zfcp_reqlist_alloc(adapter); - if (retval) { - ZFCP_LOG_INFO("request list initialization failed\n"); - goto failed_low_mem_buffers; - } - - /* initialize debug locks */ spin_lock_init(&adapter->hba_dbf_lock); spin_lock_init(&adapter->san_dbf_lock); spin_lock_init(&adapter->scsi_dbf_lock); spin_lock_init(&adapter->rec_dbf_lock); - - retval = zfcp_adapter_debug_register(adapter); - if (retval) - goto debug_register_failed; - - /* initialize error recovery stuff */ + spin_lock_init(&adapter->req_q.lock); rwlock_init(&adapter->erp_lock); - sema_init(&adapter->erp_ready_sem, 0); - INIT_LIST_HEAD(&adapter->erp_ready_head); - INIT_LIST_HEAD(&adapter->erp_running_head); - - /* initialize abort lock */ rwlock_init(&adapter->abort_lock); - /* initialise some erp stuff */ - init_waitqueue_head(&adapter->erp_thread_wqh); - init_waitqueue_head(&adapter->erp_done_wqh); + sema_init(&adapter->erp_ready_sem, 0); - /* initialize lock of associated request queue */ - rwlock_init(&adapter->request_queue.queue_lock); + INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); + INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later); /* mark adapter unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); dev_set_drvdata(&ccw_device->dev, adapter); - if (zfcp_sysfs_adapter_create_files(&ccw_device->dev)) + if (sysfs_create_group(&ccw_device->dev.kobj, + &zfcp_sysfs_adapter_attrs)) goto sysfs_failed; adapter->generic_services.parent = &adapter->ccw_device->dev; @@ -1072,7 +545,6 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) if (device_register(&adapter->generic_services)) goto generic_services_failed; - /* put allocated adapter at list tail */ write_lock_irq(&zfcp_data.config_lock); atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); list_add_tail(&adapter->list, &zfcp_data.adapter_list_head); @@ -1080,57 +552,49 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) zfcp_data.adapters++; - goto out; + zfcp_nameserver_enqueue(adapter); + + return 0; - generic_services_failed: - zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); - sysfs_failed: +generic_services_failed: + sysfs_remove_group(&ccw_device->dev.kobj, + &zfcp_sysfs_adapter_attrs); +sysfs_failed: zfcp_adapter_debug_unregister(adapter); - debug_register_failed: +debug_register_failed: dev_set_drvdata(&ccw_device->dev, NULL); - zfcp_reqlist_free(adapter); - failed_low_mem_buffers: + kfree(adapter->req_list); +failed_low_mem_buffers: zfcp_free_low_mem_buffers(adapter); - if (qdio_free(ccw_device) != 0) - ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); - qdio_allocate_failed: - zfcp_qdio_free_queues(adapter); - queues_alloc_failed: +qdio_allocate_failed: + zfcp_qdio_free(adapter); kfree(adapter); - adapter = NULL; - out: - return adapter; + return -ENOMEM; } -/* - * returns: 0 - struct zfcp_adapter data structure successfully removed - * !0 - struct zfcp_adapter data structure could not be removed - * (e.g. still used) +/** + * zfcp_adapter_dequeue - remove the adapter from the resource list + * @adapter: pointer to struct zfcp_adapter which should be removed * locks: adapter list write lock is assumed to be held by caller */ -void -zfcp_adapter_dequeue(struct zfcp_adapter *adapter) +void zfcp_adapter_dequeue(struct zfcp_adapter *adapter) { int retval = 0; unsigned long flags; + cancel_work_sync(&adapter->scan_work); + cancel_work_sync(&adapter->stat_work); zfcp_adapter_scsi_unregister(adapter); device_unregister(&adapter->generic_services); - zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); + sysfs_remove_group(&adapter->ccw_device->dev.kobj, + &zfcp_sysfs_adapter_attrs); dev_set_drvdata(&adapter->ccw_device->dev, NULL); /* sanity check: no pending FSF requests */ spin_lock_irqsave(&adapter->req_list_lock, flags); retval = zfcp_reqlist_isempty(adapter); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - if (!retval) { - ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " - "%i requests outstanding\n", - zfcp_get_busid_by_adapter(adapter), adapter, - atomic_read(&adapter->reqs_active)); - retval = -EBUSY; - goto out; - } + if (!retval) + return; zfcp_adapter_debug_unregister(adapter); @@ -1142,26 +606,18 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) /* decrease number of adapters in list */ zfcp_data.adapters--; - ZFCP_LOG_TRACE("adapter %s (%p) removed from list, " - "%i adapters still in list\n", - zfcp_get_busid_by_adapter(adapter), - adapter, zfcp_data.adapters); - - retval = qdio_free(adapter->ccw_device); - if (retval) - ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); + zfcp_qdio_free(adapter); zfcp_free_low_mem_buffers(adapter); - /* free memory of adapter data structure and queues */ - zfcp_qdio_free_queues(adapter); - zfcp_reqlist_free(adapter); + kfree(adapter->req_list); kfree(adapter->fc_stats); kfree(adapter->stats_reset_data); - ZFCP_LOG_TRACE("freeing adapter structure\n"); kfree(adapter); - out: - return; +} + +static void zfcp_sysfs_port_release(struct device *dev) +{ + kfree(container_of(dev, struct zfcp_port, sysfs_device)); } /** @@ -1170,98 +626,90 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) * @wwpn: WWPN of the remote port to be enqueued * @status: initial status for the port * @d_id: destination id of the remote port to be enqueued - * Return: pointer to enqueued port on success, NULL on error + * Returns: pointer to enqueued port on success, ERR_PTR on error * Locks: config_sema must be held to serialize changes to the port list * * All port internal structures are set up and the sysfs entry is generated. * d_id is used to enqueue ports with a well known address like the Directory * Service for nameserver lookup. */ -struct zfcp_port * -zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, - u32 d_id) +struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, + u32 status, u32 d_id) { struct zfcp_port *port; - int check_wwpn; - - check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN); - /* - * check that there is no port with this WWPN already in list - */ - if (check_wwpn) { - read_lock_irq(&zfcp_data.config_lock); - port = zfcp_get_port_by_wwpn(adapter, wwpn); - read_unlock_irq(&zfcp_data.config_lock); - if (port) - return NULL; - } + int retval; + char *bus_id; - port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL); + port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL); if (!port) - return NULL; + return ERR_PTR(-ENOMEM); - /* initialise reference count stuff */ - atomic_set(&port->refcount, 0); init_waitqueue_head(&port->remove_wq); INIT_LIST_HEAD(&port->unit_list_head); INIT_LIST_HEAD(&port->unit_remove_lh); port->adapter = adapter; + port->d_id = d_id; + port->wwpn = wwpn; - if (check_wwpn) - port->wwpn = wwpn; - - atomic_set_mask(status, &port->status); + /* mark port unusable as long as sysfs registration is not complete */ + atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status); + atomic_set(&port->refcount, 0); - /* setup for sysfs registration */ if (status & ZFCP_STATUS_PORT_WKA) { switch (d_id) { case ZFCP_DID_DIRECTORY_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "directory"); + bus_id = "directory"; break; case ZFCP_DID_MANAGEMENT_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "management"); + bus_id = "management"; break; case ZFCP_DID_KEY_DISTRIBUTION_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "key_distribution"); + bus_id = "key_distribution"; break; case ZFCP_DID_ALIAS_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "alias"); + bus_id = "alias"; break; case ZFCP_DID_TIME_SERVICE: - snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, - "time"); + bus_id = "time"; break; default: kfree(port); - return NULL; + return ERR_PTR(-EINVAL); } - port->d_id = d_id; + snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, "%s", bus_id); port->sysfs_device.parent = &adapter->generic_services; } else { snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", wwpn); port->sysfs_device.parent = &adapter->ccw_device->dev; } + port->sysfs_device.release = zfcp_sysfs_port_release; dev_set_drvdata(&port->sysfs_device, port); - /* mark port unusable as long as sysfs registration is not complete */ - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + read_lock_irq(&zfcp_data.config_lock); + if (!(status & ZFCP_STATUS_PORT_NO_WWPN)) + if (zfcp_get_port_by_wwpn(adapter, wwpn)) { + read_unlock_irq(&zfcp_data.config_lock); + goto err_out_free; + } + read_unlock_irq(&zfcp_data.config_lock); - if (device_register(&port->sysfs_device)) { - kfree(port); - return NULL; - } + if (device_register(&port->sysfs_device)) + goto err_out_free; + + if (status & ZFCP_STATUS_PORT_WKA) + retval = sysfs_create_group(&port->sysfs_device.kobj, + &zfcp_sysfs_ns_port_attrs); + else + retval = sysfs_create_group(&port->sysfs_device.kobj, + &zfcp_sysfs_port_attrs); - if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) { + if (retval) { device_unregister(&port->sysfs_device); - return NULL; + goto err_out; } zfcp_port_get(port); @@ -1274,15 +722,23 @@ zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, if (!adapter->nameserver_port) adapter->nameserver_port = port; adapter->ports++; + write_unlock_irq(&zfcp_data.config_lock); zfcp_adapter_get(adapter); - return port; + +err_out_free: + kfree(port); +err_out: + return ERR_PTR(-EINVAL); } -void -zfcp_port_dequeue(struct zfcp_port *port) +/** + * zfcp_port_dequeue - dequeues a port from the port list of the adapter + * @port: pointer to struct zfcp_port which should be removed + */ +void zfcp_port_dequeue(struct zfcp_port *port) { zfcp_port_wait(port); write_lock_irq(&zfcp_data.config_lock); @@ -1293,546 +749,53 @@ zfcp_port_dequeue(struct zfcp_port *port) fc_remote_port_delete(port->rport); port->rport = NULL; zfcp_adapter_put(port->adapter); - zfcp_sysfs_port_remove_files(&port->sysfs_device, - atomic_read(&port->status)); - device_unregister(&port->sysfs_device); -} - -/* Enqueues a nameserver port */ -int -zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) -{ - struct zfcp_port *port; - - port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, - ZFCP_DID_DIRECTORY_SERVICE); - if (!port) { - ZFCP_LOG_INFO("error: enqueue of nameserver port for " - "adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); - return -ENXIO; - } - zfcp_port_put(port); - - return 0; -} - -#undef ZFCP_LOG_AREA - -/****************************************************************/ -/******* Fibre Channel Standard related Functions **************/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC - -static void zfcp_fsf_incoming_els_rscn(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fcp_rscn_head *fcp_rscn_head; - struct fcp_rscn_element *fcp_rscn_element; - struct zfcp_port *port; - u16 i; - u16 no_entries; - u32 range_mask; - unsigned long flags; - - fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload; - fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload; - - /* see FC-FS */ - no_entries = (fcp_rscn_head->payload_len / 4); - - for (i = 1; i < no_entries; i++) { - /* skip head and start with 1st element */ - fcp_rscn_element++; - switch (fcp_rscn_element->addr_format) { - case ZFCP_PORT_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_PORT; - break; - case ZFCP_AREA_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_AREA; - break; - case ZFCP_DOMAIN_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_DOMAIN; - break; - case ZFCP_FABRIC_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_FABRIC; - break; - default: - ZFCP_LOG_INFO("incoming RSCN with unknown " - "address format\n"); - continue; - } - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) { - if (atomic_test_mask - (ZFCP_STATUS_PORT_WKA, &port->status)) - continue; - /* Do we know this port? If not skip it. */ - if (!atomic_test_mask - (ZFCP_STATUS_PORT_DID_DID, &port->status)) { - ZFCP_LOG_INFO("incoming RSCN, trying to open " - "port 0x%016Lx\n", port->wwpn); - zfcp_erp_port_reopen(port, - ZFCP_STATUS_COMMON_ERP_FAILED, - 82, fsf_req); - continue; - } - - /* - * FIXME: race: d_id might being invalidated - * (...DID_DID reset) - */ - if ((port->d_id & range_mask) - == (fcp_rscn_element->nport_did & range_mask)) { - ZFCP_LOG_TRACE("reopen did 0x%08x\n", - fcp_rscn_element->nport_did); - /* - * Unfortunately, an RSCN does not specify the - * type of change a target underwent. We assume - * that it makes sense to reopen the link. - * FIXME: Shall we try to find out more about - * the target and link state before closing it? - * How to accomplish this? (nameserver?) - * Where would such code be put in? - * (inside or outside erp) - */ - ZFCP_LOG_INFO("incoming RSCN, trying to open " - "port 0x%016Lx\n", port->wwpn); - zfcp_test_link(port); - } - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - } -} - -static void zfcp_fsf_incoming_els_plogi(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_plogi *els_plogi; - struct zfcp_port *port; - unsigned long flags; - - els_plogi = (struct fsf_plogi *) status_buffer->payload; - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) { - if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn)) - break; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) { - ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port " - "with d_id 0x%06x on adapter %s\n", - status_buffer->d_id, - zfcp_get_busid_by_adapter(adapter)); - } else { - zfcp_erp_port_forced_reopen(port, 0, 83, fsf_req); - } -} - -static void zfcp_fsf_incoming_els_logo(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload; - struct zfcp_port *port; - unsigned long flags; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) { - if (port->wwpn == els_logo->nport_wwpn) - break; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (!port || (port->wwpn != els_logo->nport_wwpn)) { - ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port " - "with d_id 0x%06x on adapter %s\n", - status_buffer->d_id, - zfcp_get_busid_by_adapter(adapter)); - } else { - zfcp_erp_port_forced_reopen(port, 0, 84, fsf_req); - } -} - -static void -zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter, - struct fsf_status_read_buffer *status_buffer) -{ - ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x " - "for adapter %s\n", *(u32 *) (status_buffer->payload), - zfcp_get_busid_by_adapter(adapter)); - -} - -void -zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_status_read_buffer *status_buffer; - u32 els_type; - struct zfcp_adapter *adapter; - - status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; - els_type = *(u32 *) (status_buffer->payload); - adapter = fsf_req->adapter; - - zfcp_san_dbf_event_incoming_els(fsf_req); - if (els_type == LS_PLOGI) - zfcp_fsf_incoming_els_plogi(fsf_req); - else if (els_type == LS_LOGO) - zfcp_fsf_incoming_els_logo(fsf_req); - else if ((els_type & 0xffff0000) == LS_RSCN) - /* we are only concerned with the command, not the length */ - zfcp_fsf_incoming_els_rscn(fsf_req); - else - zfcp_fsf_incoming_els_unknown(adapter, status_buffer); -} - - -/** - * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request - * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data - * @pool: pointer to mempool_t if non-null memory pool is used for allocation - */ -static int -zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool) -{ - struct zfcp_gid_pn_data *data; - - if (pool != NULL) { - data = mempool_alloc(pool, GFP_ATOMIC); - if (likely(data != NULL)) { - data->ct.pool = pool; - } - } else { - data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC); - } - - if (NULL == data) - return -ENOMEM; - - memset(data, 0, sizeof(*data)); - sg_init_table(&data->req , 1); - sg_init_table(&data->resp , 1); - data->ct.req = &data->req; - data->ct.resp = &data->resp; - data->ct.req_count = data->ct.resp_count = 1; - zfcp_address_to_sg(&data->ct_iu_req, &data->req, sizeof(struct ct_iu_gid_pn_req)); - zfcp_address_to_sg(&data->ct_iu_resp, &data->resp, sizeof(struct ct_iu_gid_pn_resp)); - - *gid_pn = data; - return 0; -} - -/** - * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request - * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed - */ -static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn) -{ - if (gid_pn->ct.pool) - mempool_free(gid_pn, gid_pn->ct.pool); + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA) + sysfs_remove_group(&port->sysfs_device.kobj, + &zfcp_sysfs_ns_port_attrs); else - kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn); -} - -/** - * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request - * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed - */ -int -zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action) -{ - int ret; - struct ct_iu_gid_pn_req *ct_iu_req; - struct zfcp_gid_pn_data *gid_pn; - struct zfcp_adapter *adapter = erp_action->adapter; - - ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn); - if (ret < 0) { - ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver " - "request failed for adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto out; - } - - /* setup nameserver request */ - ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req); - ct_iu_req->header.revision = ZFCP_CT_REVISION; - ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; - ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER; - ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS; - ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN; - ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE; - ct_iu_req->wwpn = erp_action->port->wwpn; - - /* setup parameters for send generic command */ - gid_pn->ct.port = adapter->nameserver_port; - gid_pn->ct.handler = zfcp_ns_gid_pn_handler; - gid_pn->ct.handler_data = (unsigned long) gid_pn; - gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; - gid_pn->port = erp_action->port; - - ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, - erp_action); - if (ret) { - ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request " - "failed for adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - - zfcp_gid_pn_buffers_free(gid_pn); - } - - out: - return ret; -} - -/** - * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request - * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data - */ -static void zfcp_ns_gid_pn_handler(unsigned long data) -{ - struct zfcp_port *port; - struct zfcp_send_ct *ct; - struct ct_iu_gid_pn_req *ct_iu_req; - struct ct_iu_gid_pn_resp *ct_iu_resp; - struct zfcp_gid_pn_data *gid_pn; - - - gid_pn = (struct zfcp_gid_pn_data *) data; - port = gid_pn->port; - ct = &gid_pn->ct; - ct_iu_req = zfcp_sg_to_address(ct->req); - ct_iu_resp = zfcp_sg_to_address(ct->resp); - - if (ct->status != 0) - goto failed; - - if (zfcp_check_ct_response(&ct_iu_resp->header)) { - /* FIXME: do we need some specific erp entry points */ - atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); - goto failed; - } - /* paranoia */ - if (ct_iu_req->wwpn != port->wwpn) { - ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver " - "lookup does not match expected wwpn 0x%016Lx " - "for adapter %s\n", ct_iu_req->wwpn, port->wwpn, - zfcp_get_busid_by_port(port)); - goto mismatch; - } - - /* looks like a valid d_id */ - port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; - atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); - ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n", - zfcp_get_busid_by_port(port), port->wwpn, port->d_id); - goto out; - - mismatch: - ZFCP_LOG_DEBUG("CT IUs do not match:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req, - sizeof(struct ct_iu_gid_pn_req)); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp, - sizeof(struct ct_iu_gid_pn_resp)); - - failed: - ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn " - "0x%016Lx for adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); - out: - zfcp_gid_pn_buffers_free(gid_pn); - return; + sysfs_remove_group(&port->sysfs_device.kobj, + &zfcp_sysfs_port_attrs); + device_unregister(&port->sysfs_device); } -/* reject CT_IU reason codes acc. to FC-GS-4 */ -static const struct zfcp_rc_entry zfcp_ct_rc[] = { - {0x01, "invalid command code"}, - {0x02, "invalid version level"}, - {0x03, "logical error"}, - {0x04, "invalid CT_IU size"}, - {0x05, "logical busy"}, - {0x07, "protocol error"}, - {0x09, "unable to perform command request"}, - {0x0b, "command not supported"}, - {0x0d, "server not available"}, - {0x0e, "session could not be established"}, - {0xff, "vendor specific error"}, - {0, NULL}, -}; - -/* LS_RJT reason codes acc. to FC-FS */ -static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = { - {0x01, "invalid LS_Command code"}, - {0x03, "logical error"}, - {0x05, "logical busy"}, - {0x07, "protocol error"}, - {0x09, "unable to perform command request"}, - {0x0b, "command not supported"}, - {0x0e, "command already in progress"}, - {0xff, "vendor specific error"}, - {0, NULL}, -}; - -/* reject reason codes according to FC-PH/FC-FS */ -static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = { - {0x01, "invalid D_ID"}, - {0x02, "invalid S_ID"}, - {0x03, "Nx_Port not available, temporary"}, - {0x04, "Nx_Port not available, permament"}, - {0x05, "class not supported"}, - {0x06, "delimiter usage error"}, - {0x07, "TYPE not supported"}, - {0x08, "invalid Link_Control"}, - {0x09, "invalid R_CTL field"}, - {0x0a, "invalid F_CTL field"}, - {0x0b, "invalid OX_ID"}, - {0x0c, "invalid RX_ID"}, - {0x0d, "invalid SEQ_ID"}, - {0x0e, "invalid DF_CTL"}, - {0x0f, "invalid SEQ_CNT"}, - {0x10, "invalid parameter field"}, - {0x11, "exchange error"}, - {0x12, "protocol error"}, - {0x13, "incorrect length"}, - {0x14, "unsupported ACK"}, - {0x15, "class of service not supported by entity at FFFFFE"}, - {0x16, "login required"}, - {0x17, "excessive sequences attempted"}, - {0x18, "unable to establish exchange"}, - {0x1a, "fabric path not available"}, - {0x1b, "invalid VC_ID (class 4)"}, - {0x1c, "invalid CS_CTL field"}, - {0x1d, "insufficient resources for VC (class 4)"}, - {0x1f, "invalid class of service"}, - {0x20, "preemption request rejected"}, - {0x21, "preemption not enabled"}, - {0x22, "multicast error"}, - {0x23, "multicast error terminate"}, - {0x24, "process login required"}, - {0xff, "vendor specific reject"}, - {0, NULL}, -}; - /** - * zfcp_rc_description - return description for given reaon code - * @code: reason code - * @rc_table: table of reason codes and descriptions + * zfcp_sg_free_table - free memory used by scatterlists + * @sg: pointer to scatterlist + * @count: number of scatterlist which are to be free'ed + * the scatterlist are expected to reference pages always */ -static const char * -zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table) +void zfcp_sg_free_table(struct scatterlist *sg, int count) { - const char *descr = "unknown reason code"; + int i; - do { - if (code == rc_table->code) { - descr = rc_table->description; + for (i = 0; i < count; i++, sg++) + if (sg) + free_page((unsigned long) sg_virt(sg)); + else break; - } - rc_table++; - } while (rc_table->code && rc_table->description); - - return descr; } /** - * zfcp_check_ct_response - evaluate reason code for CT_IU - * @rjt: response payload to an CT_IU request - * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code + * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers + * @sg: pointer to struct scatterlist + * @count: number of scatterlists which should be assigned with buffers + * of size page + * + * Returns: 0 on success, -ENOMEM otherwise */ -int -zfcp_check_ct_response(struct ct_hdr *rjt) +int zfcp_sg_setup_table(struct scatterlist *sg, int count) { - if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT) - return 0; + void *addr; + int i; - if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) { - ZFCP_LOG_NORMAL("error: invalid Generic Service command/" - "response code (0x%04hx)\n", - rjt->cmd_rsp_code); - return 1; + sg_init_table(sg, count); + for (i = 0; i < count; i++, sg++) { + addr = (void *) get_zeroed_page(GFP_KERNEL); + if (!addr) { + zfcp_sg_free_table(sg, i); + return -ENOMEM; + } + sg_set_buf(sg, addr, PAGE_SIZE); } - - ZFCP_LOG_INFO("Generic Service command rejected\n"); - ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n", - zfcp_rc_description(rjt->reason_code, zfcp_ct_rc), - (u32) rjt->reason_code, (u32) rjt->reason_code_expl, - (u32) rjt->vendor_unique); - - return 1; -} - -/** - * zfcp_print_els_rjt - print reject parameter and description for ELS reject - * @rjt_par: reject parameter acc. to FC-PH/FC-FS - * @rc_table: table of reason codes and descriptions - */ -static void -zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par, - const struct zfcp_rc_entry *rc_table) -{ - ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n", - zfcp_rc_description(rjt_par->reason_code, rc_table), - (u32) rjt_par->action, (u32) rjt_par->reason_code, - (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique); -} - -/** - * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject - * @sq: status qualifier word - * @rjt_par: reject parameter as described in FC-PH and FC-FS - * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else - */ -int -zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par) -{ - int ret = -EIO; - - if (sq == FSF_IOSTAT_NPORT_RJT) { - ZFCP_LOG_INFO("ELS rejected (P_RJT)\n"); - zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); - /* invalid d_id */ - if (rjt_par->reason_code == 0x01) - ret = -EREMCHG; - } else if (sq == FSF_IOSTAT_FABRIC_RJT) { - ZFCP_LOG_INFO("ELS rejected (F_RJT)\n"); - zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); - /* invalid d_id */ - if (rjt_par->reason_code == 0x01) - ret = -EREMCHG; - } else if (sq == FSF_IOSTAT_LS_RJT) { - ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n"); - zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc); - ret = -EREMOTEIO; - } else - ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq); - - return ret; -} - -/** - * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields - * into zfcp_port structure - * @port: zfcp_port structure - * @plogi: plogi payload - */ -void -zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) -{ - port->maxframe_size = plogi->serv_param.common_serv_param[7] | - ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); - if (plogi->serv_param.class1_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS1; - if (plogi->serv_param.class2_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS2; - if (plogi->serv_param.class3_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS3; - if (plogi->serv_param.class4_serv_param[0] & 0x80) - port->supported_classes |= FC_COS_CLASS4; + return 0; } - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c index 66d3b88..391dd29 100644 --- a/drivers/s390/scsi/zfcp_ccw.c +++ b/drivers/s390/scsi/zfcp_ccw.c @@ -1,64 +1,13 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Registration and callback for the s390 common I/O layer. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -static int zfcp_ccw_probe(struct ccw_device *); -static void zfcp_ccw_remove(struct ccw_device *); -static int zfcp_ccw_set_online(struct ccw_device *); -static int zfcp_ccw_set_offline(struct ccw_device *); -static int zfcp_ccw_notify(struct ccw_device *, int); -static void zfcp_ccw_shutdown(struct ccw_device *); - -static struct ccw_device_id zfcp_ccw_device_id[] = { - {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE, - ZFCP_CONTROL_UNIT_MODEL, - ZFCP_DEVICE_TYPE, - ZFCP_DEVICE_MODEL)}, - {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE, - ZFCP_CONTROL_UNIT_MODEL, - ZFCP_DEVICE_TYPE, - ZFCP_DEVICE_MODEL_PRIV)}, - {}, -}; - -static struct ccw_driver zfcp_ccw_driver = { - .owner = THIS_MODULE, - .name = ZFCP_NAME, - .ids = zfcp_ccw_device_id, - .probe = zfcp_ccw_probe, - .remove = zfcp_ccw_remove, - .set_online = zfcp_ccw_set_online, - .set_offline = zfcp_ccw_set_offline, - .notify = zfcp_ccw_notify, - .shutdown = zfcp_ccw_shutdown, - .driver = { - .groups = zfcp_driver_attr_groups, - }, -}; - -MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); - /** * zfcp_ccw_probe - probe function of zfcp driver * @ccw_device: pointer to belonging ccw device @@ -69,19 +18,16 @@ MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); * In addition the nameserver port will be added to the ports of the adapter * and its sysfs representation will be created too. */ -static int -zfcp_ccw_probe(struct ccw_device *ccw_device) +static int zfcp_ccw_probe(struct ccw_device *ccw_device) { - struct zfcp_adapter *adapter; int retval = 0; down(&zfcp_data.config_sema); - adapter = zfcp_adapter_enqueue(ccw_device); - if (!adapter) + if (zfcp_adapter_enqueue(ccw_device)) { + dev_err(&ccw_device->dev, + "Setup of data structures failed.\n"); retval = -EINVAL; - else - ZFCP_LOG_DEBUG("Probed adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + } up(&zfcp_data.config_sema); return retval; } @@ -95,8 +41,7 @@ zfcp_ccw_probe(struct ccw_device *ccw_device) * ports that belong to this adapter. And in addition all resources of this * adapter will be freed too. */ -static void -zfcp_ccw_remove(struct ccw_device *ccw_device) +static void zfcp_ccw_remove(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; struct zfcp_port *port, *p; @@ -106,8 +51,6 @@ zfcp_ccw_remove(struct ccw_device *ccw_device) down(&zfcp_data.config_sema); adapter = dev_get_drvdata(&ccw_device->dev); - ZFCP_LOG_DEBUG("Removing adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); write_lock_irq(&zfcp_data.config_lock); list_for_each_entry_safe(port, p, &adapter->port_list_head, list) { list_for_each_entry_safe(unit, u, &port->unit_list_head, list) { @@ -145,8 +88,7 @@ zfcp_ccw_remove(struct ccw_device *ccw_device) * registered with the SCSI stack, that the QDIO queues will be set up * and that the adapter will be opened (asynchronously). */ -static int -zfcp_ccw_set_online(struct ccw_device *ccw_device) +static int zfcp_ccw_set_online(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; int retval; @@ -155,12 +97,8 @@ zfcp_ccw_set_online(struct ccw_device *ccw_device) adapter = dev_get_drvdata(&ccw_device->dev); retval = zfcp_erp_thread_setup(adapter); - if (retval) { - ZFCP_LOG_INFO("error: start of error recovery thread for " - "adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); + if (retval) goto out; - } retval = zfcp_adapter_scsi_register(adapter); if (retval) @@ -191,8 +129,7 @@ zfcp_ccw_set_online(struct ccw_device *ccw_device) * This function gets called by the common i/o layer and sets an adapter * into state offline. */ -static int -zfcp_ccw_set_offline(struct ccw_device *ccw_device) +static int zfcp_ccw_set_offline(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; @@ -206,15 +143,14 @@ zfcp_ccw_set_offline(struct ccw_device *ccw_device) } /** - * zfcp_ccw_notify + * zfcp_ccw_notify - ccw notify function * @ccw_device: pointer to belonging ccw device * @event: indicates if adapter was detached or attached * * This function gets called by the common i/o layer if an adapter has gone * or reappeared. */ -static int -zfcp_ccw_notify(struct ccw_device *ccw_device, int event) +static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event) { struct zfcp_adapter *adapter; @@ -222,18 +158,15 @@ zfcp_ccw_notify(struct ccw_device *ccw_device, int event) adapter = dev_get_drvdata(&ccw_device->dev); switch (event) { case CIO_GONE: - ZFCP_LOG_NORMAL("adapter %s: device gone\n", - zfcp_get_busid_by_adapter(adapter)); + dev_warn(&adapter->ccw_device->dev, "device gone\n"); zfcp_erp_adapter_shutdown(adapter, 0, 87, NULL); break; case CIO_NO_PATH: - ZFCP_LOG_NORMAL("adapter %s: no path\n", - zfcp_get_busid_by_adapter(adapter)); + dev_warn(&adapter->ccw_device->dev, "no path\n"); zfcp_erp_adapter_shutdown(adapter, 0, 88, NULL); break; case CIO_OPER: - ZFCP_LOG_NORMAL("adapter %s: operational again\n", - zfcp_get_busid_by_adapter(adapter)); + dev_info(&adapter->ccw_device->dev, "operational again\n"); zfcp_erp_modify_adapter_status(adapter, 11, NULL, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); @@ -247,24 +180,10 @@ zfcp_ccw_notify(struct ccw_device *ccw_device, int event) } /** - * zfcp_ccw_register - ccw register function - * - * Registers the driver at the common i/o layer. This function will be called - * at module load time/system start. - */ -int __init -zfcp_ccw_register(void) -{ - return ccw_driver_register(&zfcp_ccw_driver); -} - -/** - * zfcp_ccw_shutdown - gets called on reboot/shutdown - * - * Makes sure that QDIO queues are down when the system gets stopped. + * zfcp_ccw_shutdown - handle shutdown from cio + * @cdev: device for adapter to shutdown. */ -static void -zfcp_ccw_shutdown(struct ccw_device *cdev) +static void zfcp_ccw_shutdown(struct ccw_device *cdev) { struct zfcp_adapter *adapter; @@ -275,4 +194,33 @@ zfcp_ccw_shutdown(struct ccw_device *cdev) up(&zfcp_data.config_sema); } -#undef ZFCP_LOG_AREA +static struct ccw_device_id zfcp_ccw_device_id[] = { + { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x3) }, + { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x4) }, /* priv. */ + {}, +}; + +MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); + +static struct ccw_driver zfcp_ccw_driver = { + .owner = THIS_MODULE, + .name = "zfcp", + .ids = zfcp_ccw_device_id, + .probe = zfcp_ccw_probe, + .remove = zfcp_ccw_remove, + .set_online = zfcp_ccw_set_online, + .set_offline = zfcp_ccw_set_offline, + .notify = zfcp_ccw_notify, + .shutdown = zfcp_ccw_shutdown, +}; + +/** + * zfcp_ccw_register - ccw register function + * + * Registers the driver at the common i/o layer. This function will be called + * at module load time/system start. + */ +int __init zfcp_ccw_register(void) +{ + return ccw_driver_register(&zfcp_ccw_driver); +} diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c new file mode 100644 index 0000000..ec2abce --- /dev/null +++ b/drivers/s390/scsi/zfcp_cfdc.c @@ -0,0 +1,259 @@ +/* + * zfcp device driver + * + * Userspace interface for accessing the + * Access Control Lists / Control File Data Channel + * + * Copyright IBM Corporation 2008 + */ + +#include <linux/types.h> +#include <linux/miscdevice.h> +#include <asm/ccwdev.h> +#include "zfcp_def.h" +#include "zfcp_ext.h" +#include "zfcp_fsf.h" + +#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 +#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 +#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 +#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 +#define ZFCP_CFDC_CMND_UPLOAD 0x00010002 + +#define ZFCP_CFDC_DOWNLOAD 0x00000001 +#define ZFCP_CFDC_UPLOAD 0x00000002 +#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 + +#define ZFCP_CFDC_IOC_MAGIC 0xDD +#define ZFCP_CFDC_IOC \ + _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_data) + +/** + * struct zfcp_cfdc_data - data for ioctl cfdc interface + * @signature: request signature + * @devno: FCP adapter device number + * @command: command code + * @fsf_status: returns status of FSF command to userspace + * @fsf_status_qual: returned to userspace + * @payloads: access conflicts list + * @control_file: access control table + */ +struct zfcp_cfdc_data { + u32 signature; + u32 devno; + u32 command; + u32 fsf_status; + u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; + u8 payloads[256]; + u8 control_file[0]; +}; + +static int zfcp_cfdc_copy_from_user(struct scatterlist *sg, + void __user *user_buffer) +{ + unsigned int length; + unsigned int size = ZFCP_CFDC_MAX_SIZE; + + while (size) { + length = min((unsigned int)size, sg->length); + if (copy_from_user(sg_virt(sg++), user_buffer, length)) + return -EFAULT; + user_buffer += length; + size -= length; + } + return 0; +} + +static int zfcp_cfdc_copy_to_user(void __user *user_buffer, + struct scatterlist *sg) +{ + unsigned int length; + unsigned int size = ZFCP_CFDC_MAX_SIZE; + + while (size) { + length = min((unsigned int) size, sg->length); + if (copy_to_user(user_buffer, sg_virt(sg++), length)) + return -EFAULT; + user_buffer += length; + size -= length; + } + return 0; +} + +static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno) +{ + struct zfcp_adapter *adapter = NULL, *cur_adapter; + struct ccw_dev_id dev_id; + + read_lock_irq(&zfcp_data.config_lock); + list_for_each_entry(cur_adapter, &zfcp_data.adapter_list_head, list) { + ccw_device_get_id(cur_adapter->ccw_device, &dev_id); + if (dev_id.devno == devno) { + adapter = cur_adapter; + zfcp_adapter_get(adapter); + break; + } + } + read_unlock_irq(&zfcp_data.config_lock); + return adapter; +} + +static int zfcp_cfdc_set_fsf(struct zfcp_fsf_cfdc *fsf_cfdc, int command) +{ + switch (command) { + case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_NORMAL_MODE; + break; + case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_FORCE; + break; + case ZFCP_CFDC_CMND_FULL_ACCESS: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_FULL_ACCESS; + break; + case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: + fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; + fsf_cfdc->option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; + break; + case ZFCP_CFDC_CMND_UPLOAD: + fsf_cfdc->command = FSF_QTCB_UPLOAD_CONTROL_FILE; + fsf_cfdc->option = 0; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int zfcp_cfdc_sg_setup(int command, struct scatterlist *sg, + u8 __user *control_file) +{ + int retval; + retval = zfcp_sg_setup_table(sg, ZFCP_CFDC_PAGES); + if (retval) + return retval; + + sg[ZFCP_CFDC_PAGES - 1].length = ZFCP_CFDC_MAX_SIZE % PAGE_SIZE; + + if (command & ZFCP_CFDC_WITH_CONTROL_FILE && + command & ZFCP_CFDC_DOWNLOAD) { + retval = zfcp_cfdc_copy_from_user(sg, control_file); + if (retval) { + zfcp_sg_free_table(sg, ZFCP_CFDC_PAGES); + return -EFAULT; + } + } + + return 0; +} + +static void zfcp_cfdc_req_to_sense(struct zfcp_cfdc_data *data, + struct zfcp_fsf_req *req) +{ + data->fsf_status = req->qtcb->header.fsf_status; + memcpy(&data->fsf_status_qual, &req->qtcb->header.fsf_status_qual, + sizeof(union fsf_status_qual)); + memcpy(&data->payloads, &req->qtcb->bottom.support.els, + sizeof(req->qtcb->bottom.support.els)); +} + +static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, + unsigned long buffer) +{ + struct zfcp_cfdc_data *data; + struct zfcp_cfdc_data __user *data_user; + struct zfcp_adapter *adapter; + struct zfcp_fsf_req *req; + struct zfcp_fsf_cfdc *fsf_cfdc; + int retval; + + if (command != ZFCP_CFDC_IOC) + return -ENOTTY; + + data_user = (void __user *) buffer; + if (!data_user) + return -EINVAL; + + fsf_cfdc = kmalloc(sizeof(struct zfcp_fsf_cfdc), GFP_KERNEL); + if (!fsf_cfdc) + return -ENOMEM; + + data = kmalloc(sizeof(struct zfcp_cfdc_data), GFP_KERNEL); + if (!data) { + retval = -ENOMEM; + goto no_mem_sense; + } + + retval = copy_from_user(data, data_user, sizeof(*data)); + if (retval) { + retval = -EFAULT; + goto free_buffer; + } + + if (data->signature != 0xCFDCACDF) { + retval = -EINVAL; + goto free_buffer; + } + + retval = zfcp_cfdc_set_fsf(fsf_cfdc, data->command); + + adapter = zfcp_cfdc_get_adapter(data->devno); + if (!adapter) { + retval = -ENXIO; + goto free_buffer; + } + + retval = zfcp_cfdc_sg_setup(data->command, fsf_cfdc->sg, + data_user->control_file); + if (retval) + goto adapter_put; + req = zfcp_fsf_control_file(adapter, fsf_cfdc); + if (IS_ERR(req)) { + retval = PTR_ERR(req); + goto free_sg; + } + + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) { + retval = -ENXIO; + goto free_fsf; + } + + zfcp_cfdc_req_to_sense(data, req); + retval = copy_to_user(data_user, data, sizeof(*data_user)); + if (retval) { + retval = -EFAULT; + goto free_fsf; + } + + if (data->command & ZFCP_CFDC_UPLOAD) + retval = zfcp_cfdc_copy_to_user(&data_user->control_file, + fsf_cfdc->sg); + + free_fsf: + zfcp_fsf_req_free(req); + free_sg: + zfcp_sg_free_table(fsf_cfdc->sg, ZFCP_CFDC_PAGES); + adapter_put: + zfcp_adapter_put(adapter); + free_buffer: + kfree(data); + no_mem_sense: + kfree(fsf_cfdc); + return retval; +} + +static const struct file_operations zfcp_cfdc_fops = { + .unlocked_ioctl = zfcp_cfdc_dev_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = zfcp_cfdc_dev_ioctl +#endif +}; + +struct miscdevice zfcp_cfdc_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = "zfcp_cfdc", + .fops = &zfcp_cfdc_fops, +}; diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c index c8bad67..36169c6 100644 --- a/drivers/s390/scsi/zfcp_dbf.c +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Debug traces for zfcp. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include <linux/ctype.h> @@ -29,8 +16,6 @@ module_param(dbfsize, uint, 0400); MODULE_PARM_DESC(dbfsize, "number of pages for each debug feature area (default 4)"); -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER - static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len, int level, char *from, int from_len) { @@ -186,8 +171,8 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req) fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE); response->fsf_req_status = fsf_req->status; response->sbal_first = fsf_req->sbal_first; - response->sbal_curr = fsf_req->sbal_curr; response->sbal_last = fsf_req->sbal_last; + response->sbal_response = fsf_req->sbal_response; response->pool = fsf_req->pool != NULL; response->erp_action = (unsigned long)fsf_req->erp_action; @@ -268,7 +253,7 @@ void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter, strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE); strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE); - rec->u.status.failed = adapter->status_read_failed; + rec->u.status.failed = atomic_read(&adapter->stat_miss); if (status_buffer != NULL) { rec->u.status.status_type = status_buffer->status_type; rec->u.status.status_subtype = status_buffer->status_subtype; @@ -355,8 +340,8 @@ static void zfcp_hba_dbf_view_response(char **p, FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE); zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status); zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first); - zfcp_dbf_out(p, "sbal_curr", "0x%02x", r->sbal_curr); zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last); + zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response); zfcp_dbf_out(p, "pool", "0x%02x", r->pool); switch (r->fsf_command) { @@ -515,13 +500,13 @@ static const char *zfcp_rec_dbf_ids[] = { [52] = "port boxed close unit", [53] = "port boxed fcp", [54] = "unit boxed fcp", - [55] = "port access denied ct", - [56] = "port access denied els", - [57] = "port access denied open port", - [58] = "port access denied close physical", - [59] = "unit access denied open unit", + [55] = "port access denied", + [56] = "", + [57] = "", + [58] = "", + [59] = "unit access denied", [60] = "shared unit access denied open unit", - [61] = "unit access denied fcp", + [61] = "", [62] = "request timeout", [63] = "adisc link test reject or timeout", [64] = "adisc link test d_id changed", @@ -546,8 +531,8 @@ static const char *zfcp_rec_dbf_ids[] = { [80] = "exclusive read-only unit access unsupported", [81] = "shared read-write unit access unsupported", [82] = "incoming rscn", - [83] = "incoming plogi", - [84] = "incoming logo", + [83] = "incoming wwpn", + [84] = "", [85] = "online", [86] = "offline", [87] = "ccw device gone", @@ -586,8 +571,8 @@ static const char *zfcp_rec_dbf_ids[] = { [120] = "unknown fsf command", [121] = "no recommendation for status qualifier", [122] = "status read physical port closed in error", - [123] = "fc service class not supported ct", - [124] = "fc service class not supported els", + [123] = "fc service class not supported", + [124] = "", [125] = "need newer zfcp", [126] = "need newer microcode", [127] = "arbitrated loop not supported", @@ -595,7 +580,7 @@ static const char *zfcp_rec_dbf_ids[] = { [129] = "qtcb size mismatch", [130] = "unknown fsf status ecd", [131] = "fcp request too big", - [132] = "fc service class not supported fcp", + [132] = "", [133] = "data direction not valid fcp", [134] = "command length not valid fcp", [135] = "status read act update", @@ -603,13 +588,18 @@ static const char *zfcp_rec_dbf_ids[] = { [137] = "hbaapi port open", [138] = "hbaapi unit open", [139] = "hbaapi unit shutdown", - [140] = "qdio error", + [140] = "qdio error outbound", [141] = "scsi host reset", [142] = "dismissing fsf request for recovery action", [143] = "recovery action timed out", [144] = "recovery action gone", [145] = "recovery action being processed", [146] = "recovery action ready for next step", + [147] = "qdio error inbound", + [148] = "nameserver needed for port scan", + [149] = "port scan", + [150] = "ptp attach", + [151] = "port validation failed", }; static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view, @@ -670,24 +660,20 @@ static struct debug_view zfcp_rec_dbf_view = { * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation * @id2: identifier for event * @adapter: adapter - * @lock: non-zero value indicates that erp_lock has not yet been acquired + * This function assumes that the caller is holding erp_lock. */ -void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock) +void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter) { struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf; unsigned long flags = 0; struct list_head *entry; unsigned ready = 0, running = 0, total; - if (lock) - read_lock_irqsave(&adapter->erp_lock, flags); list_for_each(entry, &adapter->erp_ready_head) ready++; list_for_each(entry, &adapter->erp_running_head) running++; total = adapter->erp_total_count; - if (lock) - read_unlock_irqrestore(&adapter->erp_lock, flags); spin_lock_irqsave(&adapter->rec_dbf_lock, flags); memset(r, 0, sizeof(*r)); @@ -696,10 +682,25 @@ void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock) r->u.thread.total = total; r->u.thread.ready = ready; r->u.thread.running = running; - debug_event(adapter->rec_dbf, 5, r, sizeof(*r)); + debug_event(adapter->rec_dbf, 6, r, sizeof(*r)); spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags); } +/** + * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation + * @id2: identifier for event + * @adapter: adapter + * This function assumes that the caller does not hold erp_lock. + */ +void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter) +{ + unsigned long flags; + + read_lock_irqsave(&adapter->erp_lock, flags); + zfcp_rec_dbf_event_thread(id2, adapter); + read_unlock_irqrestore(&adapter->erp_lock, flags); +} + static void zfcp_rec_dbf_event_target(u8 id2, void *ref, struct zfcp_adapter *adapter, atomic_t *status, atomic_t *erp_count, @@ -823,7 +824,7 @@ void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action) r->u.action.status = erp_action->status; r->u.action.step = erp_action->step; r->u.action.fsf_req = (unsigned long)erp_action->fsf_req; - debug_event(adapter->rec_dbf, 4, r, sizeof(*r)); + debug_event(adapter->rec_dbf, 5, r, sizeof(*r)); spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags); } @@ -960,7 +961,7 @@ void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req) zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id, fc_host_port_id(adapter->scsi_host), - *(u8 *)buf->payload, (void *)buf->payload, + buf->payload.data[0], (void *)buf->payload.data, length); } @@ -1064,8 +1065,7 @@ static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level, if (fsf_req != NULL) { fcp_rsp = (struct fcp_rsp_iu *) &(fsf_req->qtcb->bottom.io.fcp_rsp); - fcp_rsp_info = - zfcp_get_fcp_rsp_info_ptr(fcp_rsp); + fcp_rsp_info = (unsigned char *) &fcp_rsp[1]; fcp_sns_info = zfcp_get_fcp_sns_info_ptr(fcp_rsp); @@ -1279,5 +1279,3 @@ void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter) adapter->hba_dbf = NULL; adapter->rec_dbf = NULL; } - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_dbf.h b/drivers/s390/scsi/zfcp_dbf.h index 54c34e4..d04aea6 100644 --- a/drivers/s390/scsi/zfcp_dbf.h +++ b/drivers/s390/scsi/zfcp_dbf.h @@ -38,7 +38,7 @@ struct zfcp_rec_dbf_record_thread { u32 total; u32 ready; u32 running; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record_target { u64 ref; @@ -47,7 +47,7 @@ struct zfcp_rec_dbf_record_target { u64 wwpn; u64 fcp_lun; u32 erp_count; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record_trigger { u8 want; @@ -59,14 +59,14 @@ struct zfcp_rec_dbf_record_trigger { u64 action; u64 wwpn; u64 fcp_lun; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record_action { u32 status; u32 step; u64 action; u64 fsf_req; -} __attribute__ ((packed)); +}; struct zfcp_rec_dbf_record { u8 id; @@ -77,7 +77,7 @@ struct zfcp_rec_dbf_record { struct zfcp_rec_dbf_record_target target; struct zfcp_rec_dbf_record_trigger trigger; } u; -} __attribute__ ((packed)); +}; enum { ZFCP_REC_DBF_ID_ACTION, @@ -97,8 +97,8 @@ struct zfcp_hba_dbf_record_response { u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; u32 fsf_req_status; u8 sbal_first; - u8 sbal_curr; u8 sbal_last; + u8 sbal_response; u8 pool; u64 erp_action; union { diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index bda8c77..67f45fc 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Global definitions for the zfcp device driver. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #ifndef ZFCP_DEF_H @@ -26,7 +13,6 @@ #include <linux/init.h> #include <linux/moduleparam.h> -#include <linux/miscdevice.h> #include <linux/major.h> #include <linux/blkdev.h> #include <linux/delay.h> @@ -53,9 +39,6 @@ /********************* GENERAL DEFINES *********************************/ -/* zfcp version number, it consists of major, minor, and patch-level number */ -#define ZFCP_VERSION "4.8.0" - /** * zfcp_sg_to_address - determine kernel address from struct scatterlist * @list: struct scatterlist @@ -93,11 +76,6 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) #define ZFCP_DEVICE_MODEL 0x03 #define ZFCP_DEVICE_MODEL_PRIV 0x04 -/* allow as many chained SBALs as are supported by hardware */ -#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ -#define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ -#define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ - /* DMQ bug workaround: don't use last SBALE */ #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) @@ -106,42 +84,17 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) /* max. number of (data buffer) SBALEs in largest SBAL chain */ #define ZFCP_MAX_SBALES_PER_REQ \ - (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) + (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8) /* max. number of (data buffer) SBALEs in largest SBAL chain multiplied with number of sectors per 4k block */ -/* FIXME(tune): free space should be one max. SBAL chain plus what? */ -#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ - - (ZFCP_MAX_SBALS_PER_REQ + 4)) - -#define ZFCP_SBAL_TIMEOUT (5*HZ) - -#define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */ - -/* queue polling (values in microseconds) */ -#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ -#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ -#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ -#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ - -#define QDIO_SCSI_QFMT 1 /* 1 for FSF */ -#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) - /********************* FSF SPECIFIC DEFINES *********************************/ -#define ZFCP_ULP_INFO_VERSION 26 -#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION /* ATTENTION: value must not be used by hardware */ #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 -#define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 -#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM - -/* Do 1st retry in 1 second, then double the timeout for each following retry */ -#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1 -#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 /* timeout value for "default timer" for fsf requests */ #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) @@ -153,17 +106,9 @@ typedef unsigned long long fcp_lun_t; /* data length field may be at variable position in FCP-2 FCP_CMND IU */ typedef unsigned int fcp_dl_t; -#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 - /* timeout for name-server lookup (in seconds) */ #define ZFCP_NS_GID_PN_TIMEOUT 10 -/* largest SCSI command we can process */ -/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ -#define ZFCP_MAX_SCSI_CMND_LENGTH 255 -/* maximum number of commands in LUN queue (tagged queueing) */ -#define ZFCP_CMND_PER_LUN 32 - /* task attribute values in FCP-2 FCP_CMND IU */ #define SIMPLE_Q 0 #define HEAD_OF_Q 1 @@ -224,9 +169,9 @@ struct fcp_rsp_iu { #define RSP_CODE_TASKMAN_FAILED 5 /* see fc-fs */ -#define LS_RSCN 0x61040000 -#define LS_LOGO 0x05000000 -#define LS_PLOGI 0x03000000 +#define LS_RSCN 0x61 +#define LS_LOGO 0x05 +#define LS_PLOGI 0x03 struct fcp_rscn_head { u8 command; @@ -266,7 +211,6 @@ struct fcp_logo { * FC-FS stuff */ #define R_A_TOV 10 /* seconds */ -#define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) #define ZFCP_LS_RLS 0x0f #define ZFCP_LS_ADISC 0x52 @@ -311,7 +255,10 @@ struct zfcp_rc_entry { #define ZFCP_CT_DIRECTORY_SERVICE 0xFC #define ZFCP_CT_NAME_SERVER 0x02 #define ZFCP_CT_SYNCHRONOUS 0x00 +#define ZFCP_CT_SCSI_FCP 0x08 +#define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09 #define ZFCP_CT_GID_PN 0x0121 +#define ZFCP_CT_GPN_FT 0x0172 #define ZFCP_CT_MAX_SIZE 0x1020 #define ZFCP_CT_ACCEPT 0x8002 #define ZFCP_CT_REJECT 0x8001 @@ -321,107 +268,6 @@ struct zfcp_rc_entry { */ #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) -/******************** LOGGING MACROS AND DEFINES *****************************/ - -/* - * Logging may be applied on certain kinds of driver operations - * independently. Additionally, different log-levels are supported for - * each of these areas. - */ - -#define ZFCP_NAME "zfcp" - -/* independent log areas */ -#define ZFCP_LOG_AREA_OTHER 0 -#define ZFCP_LOG_AREA_SCSI 1 -#define ZFCP_LOG_AREA_FSF 2 -#define ZFCP_LOG_AREA_CONFIG 3 -#define ZFCP_LOG_AREA_CIO 4 -#define ZFCP_LOG_AREA_QDIO 5 -#define ZFCP_LOG_AREA_ERP 6 -#define ZFCP_LOG_AREA_FC 7 - -/* log level values*/ -#define ZFCP_LOG_LEVEL_NORMAL 0 -#define ZFCP_LOG_LEVEL_INFO 1 -#define ZFCP_LOG_LEVEL_DEBUG 2 -#define ZFCP_LOG_LEVEL_TRACE 3 - -/* - * this allows removal of logging code by the preprocessor - * (the most detailed log level still to be compiled in is specified, - * higher log levels are removed) - */ -#define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE - -/* get "loglevel" nibble assignment */ -#define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \ - ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF) - -/* set "loglevel" nibble */ -#define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \ - (value << (zfcp_lognibble << 2)) - -/* all log-level defaults are combined to generate initial log-level */ -#define ZFCP_LOG_LEVEL_DEFAULTS \ - (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \ - ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC)) - -/* check whether we have the right level for logging */ -#define ZFCP_LOG_CHECK(level) \ - ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level) - -/* logging routine for zfcp */ -#define _ZFCP_LOG(fmt, args...) \ - printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __func__, \ - __LINE__ , ##args) - -#define ZFCP_LOG(level, fmt, args...) \ -do { \ - if (ZFCP_LOG_CHECK(level)) \ - _ZFCP_LOG(fmt, ##args); \ -} while (0) - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL -# define ZFCP_LOG_NORMAL(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_NORMAL(fmt, args...) \ -do { \ - if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \ - printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ -} while (0) -#endif - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO -# define ZFCP_LOG_INFO(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_INFO(fmt, args...) \ -do { \ - if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \ - printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ -} while (0) -#endif - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG -# define ZFCP_LOG_DEBUG(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_DEBUG(fmt, args...) \ - ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args) -#endif - -#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE -# define ZFCP_LOG_TRACE(fmt, args...) do { } while (0) -#else -# define ZFCP_LOG_TRACE(fmt, args...) \ - ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) -#endif - /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ /* @@ -441,6 +287,7 @@ do { \ #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 +#define ZFCP_STATUS_COMMON_NOESC 0x00200000 /* adapter status */ #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 @@ -496,77 +343,6 @@ do { \ #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 -/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ - -#define ZFCP_MAX_ERPS 3 - -#define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) -#define ZFCP_ERP_MEMWAIT_TIMEOUT HZ - -#define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 -#define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 -#define ZFCP_STATUS_ERP_DISMISSING 0x00100000 -#define ZFCP_STATUS_ERP_DISMISSED 0x00200000 -#define ZFCP_STATUS_ERP_LOWMEM 0x00400000 - -#define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 -#define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 -#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 -#define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 -#define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 -#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 -#define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 -#define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 -#define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 - -/* Ordered by escalation level (necessary for proper erp-code operation) */ -#define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 -#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 -#define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 -#define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 - -#define ZFCP_ERP_ACTION_RUNNING 0x1 -#define ZFCP_ERP_ACTION_READY 0x2 - -#define ZFCP_ERP_SUCCEEDED 0x0 -#define ZFCP_ERP_FAILED 0x1 -#define ZFCP_ERP_CONTINUES 0x2 -#define ZFCP_ERP_EXIT 0x3 -#define ZFCP_ERP_DISMISSED 0x4 -#define ZFCP_ERP_NOMEM 0x5 - - -/******************** CFDC SPECIFIC STUFF *****************************/ - -/* Firewall data channel sense data record */ -struct zfcp_cfdc_sense_data { - u32 signature; /* Request signature */ - u32 devno; /* FCP adapter device number */ - u32 command; /* Command code */ - u32 fsf_status; /* FSF request status and status qualifier */ - u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; - u8 payloads[256]; /* Access conflicts list */ - u8 control_file[0]; /* Access control table */ -}; - -#define ZFCP_CFDC_SIGNATURE 0xCFDCACDF - -#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 -#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 -#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 -#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 -#define ZFCP_CFDC_CMND_UPLOAD 0x00010002 - -#define ZFCP_CFDC_DOWNLOAD 0x00000001 -#define ZFCP_CFDC_UPLOAD 0x00000002 -#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 - -#define ZFCP_CFDC_DEV_NAME "zfcp_cfdc" -#define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR -#define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR - -#define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024 - /************************* STRUCTURE DEFINITIONS *****************************/ struct zfcp_fsf_req; @@ -623,7 +399,6 @@ typedef void (*zfcp_send_ct_handler_t)(unsigned long); * @resp_count: number of elements in response scatter-gather list * @handler: handler function (called for response to the request) * @handler_data: data passed to handler function - * @pool: pointer to memory pool for ct request structure * @timeout: FSF timeout for this request * @completion: completion for synchronization purposes * @status: used to pass error status to calling function @@ -636,7 +411,6 @@ struct zfcp_send_ct { unsigned int resp_count; zfcp_send_ct_handler_t handler; unsigned long handler_data; - mempool_t *pool; int timeout; struct completion *completion; int status; @@ -685,13 +459,13 @@ struct zfcp_send_els { }; struct zfcp_qdio_queue { - struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ - u8 free_index; /* index of next free bfr + struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ + u8 first; /* index of next free bfr in queue (free_count>0) */ - atomic_t free_count; /* number of free buffers + atomic_t count; /* number of free buffers in queue */ - rwlock_t queue_lock; /* lock for operations on queue */ - int distance_from_int; /* SBALs used since PCI indication + spinlock_t lock; /* lock for operations on queue */ + int pci_batch; /* SBALs since PCI indication was last set */ }; @@ -708,6 +482,24 @@ struct zfcp_erp_action { struct timer_list timer; }; +struct fsf_latency_record { + u32 min; + u32 max; + u64 sum; +}; + +struct latency_cont { + struct fsf_latency_record channel; + struct fsf_latency_record fabric; + u64 counter; +}; + +struct zfcp_latencies { + struct latency_cont read; + struct latency_cont write; + struct latency_cont cmd; + spinlock_t lock; +}; struct zfcp_adapter { struct list_head list; /* list of adapters */ @@ -723,24 +515,25 @@ struct zfcp_adapter { u32 adapter_features; /* FCP channel features */ u32 connection_features; /* host connection features */ u32 hardware_version; /* of FCP channel */ + u16 timer_ticks; /* time int for a tick */ struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ struct list_head port_list_head; /* remote port list */ struct list_head port_remove_lh; /* head of ports to be removed */ u32 ports; /* number of remote ports */ - atomic_t reqs_active; /* # active FSF reqs */ unsigned long req_no; /* unique FSF req number */ struct list_head *req_list; /* list of pending reqs */ spinlock_t req_list_lock; /* request list lock */ - struct zfcp_qdio_queue request_queue; /* request queue */ + struct zfcp_qdio_queue req_q; /* request queue */ u32 fsf_req_seq_no; /* FSF cmnd seq number */ wait_queue_head_t request_wq; /* can be used to wait for more avaliable SBALs */ - struct zfcp_qdio_queue response_queue; /* response queue */ + struct zfcp_qdio_queue resp_q; /* response queue */ rwlock_t abort_lock; /* Protects against SCSI stack abort/command completion races */ - u16 status_read_failed; /* # failed status reads */ + atomic_t stat_miss; /* # missing status reads*/ + struct work_struct stat_work; atomic_t status; /* status of this adapter */ struct list_head erp_ready_head; /* error recovery for this adapter/devices */ @@ -774,13 +567,9 @@ struct zfcp_adapter { struct fc_host_statistics *fc_stats; struct fsf_qtcb_bottom_port *stats_reset_data; unsigned long stats_reset; + struct work_struct scan_work; }; -/* - * the struct device sysfs_device must be at the beginning of this structure. - * pointer to struct device is used to free port structure in release function - * of the device. don't change! - */ struct zfcp_port { struct device sysfs_device; /* sysfs device */ struct fc_rport *rport; /* rport of fc transport class */ @@ -804,10 +593,6 @@ struct zfcp_port { u32 supported_classes; }; -/* the struct device sysfs_device must be at the beginning of this structure. - * pointer to struct device is used to free unit structure in release function - * of the device. don't change! - */ struct zfcp_unit { struct device sysfs_device; /* sysfs device */ struct list_head list; /* list of logical units */ @@ -822,6 +607,7 @@ struct zfcp_unit { struct scsi_device *device; /* scsi device struct pointer */ struct zfcp_erp_action erp_action; /* pending error recovery */ atomic_t erp_counter; + struct zfcp_latencies latencies; }; /* FSF request */ @@ -831,19 +617,19 @@ struct zfcp_fsf_req { struct zfcp_adapter *adapter; /* adapter request belongs to */ u8 sbal_number; /* nr of SBALs free for use */ u8 sbal_first; /* first SBAL for this request */ - u8 sbal_last; /* last possible SBAL for + u8 sbal_last; /* last SBAL for this request */ + u8 sbal_limit; /* last possible SBAL for this reuest */ - u8 sbal_curr; /* current SBAL during creation - of request */ u8 sbale_curr; /* current SBALE during creation of request */ + u8 sbal_response; /* SBAL used in interrupt */ wait_queue_head_t completion_wq; /* can be used by a routine to wait for completion */ volatile u32 status; /* status of this request */ u32 fsf_command; /* FSF Command copy */ struct fsf_qtcb *qtcb; /* address of associated QTCB */ u32 seq_no; /* Sequence number of request */ - unsigned long data; /* private data of request */ + void *data; /* private data of request */ struct timer_list timer; /* used for erp or scsi er */ struct zfcp_erp_action *erp_action; /* used if this request is issued on behalf of erp */ @@ -851,10 +637,9 @@ struct zfcp_fsf_req { from emergency pool */ unsigned long long issued; /* request sent time (STCK) */ struct zfcp_unit *unit; + void (*handler)(struct zfcp_fsf_req *); }; -typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*); - /* driver data */ struct zfcp_data { struct scsi_host_template scsi_host_template; @@ -873,29 +658,11 @@ struct zfcp_data { char init_busid[BUS_ID_SIZE]; wwn_t init_wwpn; fcp_lun_t init_fcp_lun; - char *driver_version; struct kmem_cache *fsf_req_qtcb_cache; struct kmem_cache *sr_buffer_cache; struct kmem_cache *gid_pn_cache; }; -/** - * struct zfcp_sg_list - struct describing a scatter-gather list - * @sg: pointer to array of (struct scatterlist) - * @count: number of elements in scatter-gather list - */ -struct zfcp_sg_list { - struct scatterlist *sg; - unsigned int count; -}; - -/* number of elements for various memory pools */ -#define ZFCP_POOL_FSF_REQ_ERP_NR 1 -#define ZFCP_POOL_FSF_REQ_SCSI_NR 1 -#define ZFCP_POOL_FSF_REQ_ABORT_NR 1 -#define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM -#define ZFCP_POOL_DATA_GID_PN_NR 1 - /* struct used by memory pools for fsf_requests */ struct zfcp_fsf_req_qtcb { struct zfcp_fsf_req fsf_req; @@ -905,7 +672,6 @@ struct zfcp_fsf_req_qtcb { /********************** ZFCP SPECIFIC DEFINES ********************************/ #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 -#define ZFCP_WAIT_FOR_SBAL 0x00000004 #define ZFCP_REQ_NO_QTCB 0x00000008 #define ZFCP_SET 0x00000100 @@ -916,12 +682,6 @@ struct zfcp_fsf_req_qtcb { ((atomic_read(target) & mask) == mask) #endif -extern void _zfcp_hex_dump(char *, int); -#define ZFCP_HEX_DUMP(level, addr, count) \ - if (ZFCP_LOG_CHECK(level)) { \ - _zfcp_hex_dump(addr, count); \ - } - #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) @@ -934,15 +694,6 @@ static inline int zfcp_reqlist_hash(unsigned long req_id) return req_id % REQUEST_LIST_SIZE; } -static inline void zfcp_reqlist_add(struct zfcp_adapter *adapter, - struct zfcp_fsf_req *fsf_req) -{ - unsigned int idx; - - idx = zfcp_reqlist_hash(fsf_req->req_id); - list_add_tail(&fsf_req->list, &adapter->req_list[idx]); -} - static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter, struct zfcp_fsf_req *fsf_req) { diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 8054846..643ac4b 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -1,641 +1,406 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Error Recovery Procedures (ERP). * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP - #include "zfcp_ext.h" -static int zfcp_erp_adisc(struct zfcp_port *); -static void zfcp_erp_adisc_handler(unsigned long); - -static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int, u8, - void *); -static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int, u8, - void *); -static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int, u8, void *); -static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int, u8, void *); - -static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int, u8, - void *); -static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int, u8, - void *); - -static void zfcp_erp_adapter_block(struct zfcp_adapter *, int); -static void zfcp_erp_adapter_unblock(struct zfcp_adapter *); -static void zfcp_erp_port_block(struct zfcp_port *, int); -static void zfcp_erp_port_unblock(struct zfcp_port *); -static void zfcp_erp_unit_block(struct zfcp_unit *, int); -static void zfcp_erp_unit_unblock(struct zfcp_unit *); - -static int zfcp_erp_thread(void *); - -static int zfcp_erp_strategy(struct zfcp_erp_action *); - -static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *); -static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *); -static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int); -static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int); -static int zfcp_erp_strategy_check_port(struct zfcp_port *, int); -static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int); -static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *, - struct zfcp_port *, - struct zfcp_unit *, int); -static int zfcp_erp_strategy_statechange_detected(atomic_t *, u32); -static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *, - struct zfcp_port *, - struct zfcp_unit *, int); -static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *); -static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int); - -static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int); -static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *); -static int zfcp_erp_adapter_strategy_open_fsf_statusread( - struct zfcp_erp_action *); - -static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *); -static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *); - -static int zfcp_erp_port_strategy(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *); -static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_nameserver_wakeup( - struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *); -static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *); - -static int zfcp_erp_unit_strategy(struct zfcp_erp_action *); -static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *); -static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *); -static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *); - -static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *); -static void zfcp_erp_action_dismiss_port(struct zfcp_port *); -static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *); -static void zfcp_erp_action_dismiss(struct zfcp_erp_action *); - -static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *, - struct zfcp_port *, struct zfcp_unit *, - u8 id, void *ref); -static int zfcp_erp_action_dequeue(struct zfcp_erp_action *); -static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *, - struct zfcp_port *, struct zfcp_unit *, - int); - -static void zfcp_erp_action_ready(struct zfcp_erp_action *); -static int zfcp_erp_action_exists(struct zfcp_erp_action *); - -static void zfcp_erp_action_to_ready(struct zfcp_erp_action *); -static void zfcp_erp_action_to_running(struct zfcp_erp_action *); - -static void zfcp_erp_memwait_handler(unsigned long); +#define ZFCP_MAX_ERPS 3 -/** - * zfcp_close_qdio - close qdio queues for an adapter - */ -static void zfcp_close_qdio(struct zfcp_adapter *adapter) -{ - struct zfcp_qdio_queue *req_queue; - int first, count; +enum zfcp_erp_act_flags { + ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000, + ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000, + ZFCP_STATUS_ERP_DISMISSING = 0x00100000, + ZFCP_STATUS_ERP_DISMISSED = 0x00200000, + ZFCP_STATUS_ERP_LOWMEM = 0x00400000, +}; - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) - return; +enum zfcp_erp_steps { + ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, + ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, + ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, + ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, + ZFCP_ERP_STEP_NAMESERVER_OPEN = 0x0200, + ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400, + ZFCP_ERP_STEP_PORT_OPENING = 0x0800, + ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000, + ZFCP_ERP_STEP_UNIT_OPENING = 0x2000, +}; - /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ - req_queue = &adapter->request_queue; - write_lock_irq(&req_queue->queue_lock); - atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); - write_unlock_irq(&req_queue->queue_lock); - - while (qdio_shutdown(adapter->ccw_device, - QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - ssleep(1); - - /* cleanup used outbound sbals */ - count = atomic_read(&req_queue->free_count); - if (count < QDIO_MAX_BUFFERS_PER_Q) { - first = (req_queue->free_index+count) % QDIO_MAX_BUFFERS_PER_Q; - count = QDIO_MAX_BUFFERS_PER_Q - count; - zfcp_qdio_zero_sbals(req_queue->buffer, first, count); - } - req_queue->free_index = 0; - atomic_set(&req_queue->free_count, 0); - req_queue->distance_from_int = 0; - adapter->response_queue.free_index = 0; - atomic_set(&adapter->response_queue.free_count, 0); +enum zfcp_erp_act_type { + ZFCP_ERP_ACTION_REOPEN_UNIT = 1, + ZFCP_ERP_ACTION_REOPEN_PORT = 2, + ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, + ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, +}; + +enum zfcp_erp_act_state { + ZFCP_ERP_ACTION_RUNNING = 1, + ZFCP_ERP_ACTION_READY = 2, +}; + +enum zfcp_erp_act_result { + ZFCP_ERP_SUCCEEDED = 0, + ZFCP_ERP_FAILED = 1, + ZFCP_ERP_CONTINUES = 2, + ZFCP_ERP_EXIT = 3, + ZFCP_ERP_DISMISSED = 4, + ZFCP_ERP_NOMEM = 5, +}; + +static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask) +{ + zfcp_erp_modify_adapter_status(adapter, 15, NULL, + ZFCP_STATUS_COMMON_UNBLOCKED | mask, + ZFCP_CLEAR); } -/** - * zfcp_close_fsf - stop FSF operations for an adapter - * - * Dismiss and cleanup all pending fsf_reqs (this wakes up all initiators of - * requests waiting for completion; especially this returns SCSI commands - * with error state). - */ -static void zfcp_close_fsf(struct zfcp_adapter *adapter) +static int zfcp_erp_action_exists(struct zfcp_erp_action *act) { - /* close queues to ensure that buffers are not accessed by adapter */ - zfcp_close_qdio(adapter); - zfcp_fsf_req_dismiss_all(adapter); - /* reset FSF request sequence number */ - adapter->fsf_req_seq_no = 0; - /* all ports and units are closed */ - zfcp_erp_modify_adapter_status(adapter, 24, NULL, - ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); + struct zfcp_erp_action *curr_act; + + list_for_each_entry(curr_act, &act->adapter->erp_running_head, list) + if (act == curr_act) + return ZFCP_ERP_ACTION_RUNNING; + return 0; } -/** - * zfcp_fsf_request_timeout_handler - called if a request timed out - * @data: pointer to adapter for handler function - * - * This function needs to be called if requests (ELS, Generic Service, - * or SCSI commands) exceed a certain time limit. The assumption is - * that after the time limit the adapter get stuck. So we trigger a reopen of - * the adapter. - */ -static void zfcp_fsf_request_timeout_handler(unsigned long data) +static void zfcp_erp_action_ready(struct zfcp_erp_action *act) { - struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; - zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62, - NULL); + struct zfcp_adapter *adapter = act->adapter; + + list_move(&act->list, &act->adapter->erp_ready_head); + zfcp_rec_dbf_event_action(146, act); + up(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread(2, adapter); } -void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, unsigned long timeout) +static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act) { - fsf_req->timer.function = zfcp_fsf_request_timeout_handler; - fsf_req->timer.data = (unsigned long) fsf_req->adapter; - fsf_req->timer.expires = jiffies + timeout; - add_timer(&fsf_req->timer); + act->status |= ZFCP_STATUS_ERP_DISMISSED; + if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING) + zfcp_erp_action_ready(act); } -/* - * function: - * - * purpose: called if an adapter failed, - * initiates adapter recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter, - int clear_mask, u8 id, void *ref) +static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) { - int retval; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE) + zfcp_erp_action_dismiss(&unit->erp_action); +} - ZFCP_LOG_DEBUG("reopen adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); +static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) +{ + struct zfcp_unit *unit; - zfcp_erp_adapter_block(adapter, clear_mask); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE) + zfcp_erp_action_dismiss(&port->erp_action); + else + list_for_each_entry(unit, &port->unit_list_head, list) + zfcp_erp_action_dismiss_unit(unit); +} - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { - ZFCP_LOG_DEBUG("skipped reopen of failed adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - /* ensure propagation of failed status to new devices */ - zfcp_erp_adapter_failed(adapter, 13, NULL); - retval = -EIO; - goto out; - } - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, - adapter, NULL, NULL, id, ref); +static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; - out: - return retval; + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE) + zfcp_erp_action_dismiss(&adapter->erp_action); + else + list_for_each_entry(port, &adapter->port_list_head, list) + zfcp_erp_action_dismiss_port(port); } -/* - * function: - * - * purpose: Wrappper for zfcp_erp_adapter_reopen_internal - * used to ensure the correct locking - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -int zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask, - u8 id, void *ref) +static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, + struct zfcp_port *port, + struct zfcp_unit *unit) { - int retval; - unsigned long flags; + int need = want; + int u_status, p_status, a_status; - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask, id, ref); - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + switch (want) { + case ZFCP_ERP_ACTION_REOPEN_UNIT: + u_status = atomic_read(&unit->status); + if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE) + return 0; + p_status = atomic_read(&port->status); + if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) || + p_status & ZFCP_STATUS_COMMON_ERP_FAILED) + return 0; + if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED)) + need = ZFCP_ERP_ACTION_REOPEN_PORT; + /* fall through */ + case ZFCP_ERP_ACTION_REOPEN_PORT: + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: + p_status = atomic_read(&port->status); + if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE) + return 0; + a_status = atomic_read(&adapter->status); + if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) || + a_status & ZFCP_STATUS_COMMON_ERP_FAILED) + return 0; + if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED)) + need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; + /* fall through */ + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + a_status = atomic_read(&adapter->status); + if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) + return 0; + } - return retval; + return need; } -int zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask, - u8 id, void *ref) +static struct zfcp_erp_action *zfcp_erp_setup_act(int need, + struct zfcp_adapter *adapter, + struct zfcp_port *port, + struct zfcp_unit *unit) { - int retval; + struct zfcp_erp_action *erp_action; + u32 status = 0; - retval = zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_COMMON_RUNNING | - ZFCP_STATUS_COMMON_ERP_FAILED | - clear_mask, id, ref); + switch (need) { + case ZFCP_ERP_ACTION_REOPEN_UNIT: + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); + erp_action = &unit->erp_action; + if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING)) + status = ZFCP_STATUS_ERP_CLOSE_ONLY; + break; - return retval; -} + case ZFCP_ERP_ACTION_REOPEN_PORT: + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: + zfcp_port_get(port); + zfcp_erp_action_dismiss_port(port); + atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); + erp_action = &port->erp_action; + if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING)) + status = ZFCP_STATUS_ERP_CLOSE_ONLY; + break; -int zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask, u8 id, - void *ref) -{ - int retval; + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + zfcp_adapter_get(adapter); + zfcp_erp_action_dismiss_adapter(adapter); + atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); + erp_action = &adapter->erp_action; + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_RUNNING)) + status = ZFCP_STATUS_ERP_CLOSE_ONLY; + break; - retval = zfcp_erp_port_reopen(port, - ZFCP_STATUS_COMMON_RUNNING | - ZFCP_STATUS_COMMON_ERP_FAILED | - clear_mask, id, ref); + default: + return NULL; + } - return retval; + memset(erp_action, 0, sizeof(struct zfcp_erp_action)); + erp_action->adapter = adapter; + erp_action->port = port; + erp_action->unit = unit; + erp_action->action = need; + erp_action->status = status; + + return erp_action; } -int zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask, u8 id, - void *ref) +static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, + struct zfcp_port *port, + struct zfcp_unit *unit, u8 id, void *ref) { - int retval; + int retval = 1, need; + struct zfcp_erp_action *act = NULL; + + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_UP)) + return -EIO; - retval = zfcp_erp_unit_reopen(unit, - ZFCP_STATUS_COMMON_RUNNING | - ZFCP_STATUS_COMMON_ERP_FAILED | - clear_mask, id, ref); + need = zfcp_erp_required_act(want, adapter, port, unit); + if (!need) + goto out; + atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); + act = zfcp_erp_setup_act(need, adapter, port, unit); + if (!act) + goto out; + ++adapter->erp_total_count; + list_add_tail(&act->list, &adapter->erp_ready_head); + up(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread(1, adapter); + retval = 0; + out: + zfcp_rec_dbf_event_trigger(id, ref, want, need, act, + adapter, port, unit); return retval; } - -/** - * zfcp_erp_adisc - send ADISC ELS command - * @port: port structure - */ -static int -zfcp_erp_adisc(struct zfcp_port *port) +static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, + int clear_mask, u8 id, void *ref) { - struct zfcp_adapter *adapter = port->adapter; - struct zfcp_send_els *send_els; - struct zfcp_ls_adisc *adisc; - void *address = NULL; - int retval = 0; - - send_els = kzalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC); - if (send_els == NULL) - goto nomem; - - send_els->req = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); - if (send_els->req == NULL) - goto nomem; - sg_init_table(send_els->req, 1); - - send_els->resp = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); - if (send_els->resp == NULL) - goto nomem; - sg_init_table(send_els->resp, 1); - - address = (void *) get_zeroed_page(GFP_ATOMIC); - if (address == NULL) - goto nomem; - - zfcp_address_to_sg(address, send_els->req, sizeof(struct zfcp_ls_adisc)); - address += PAGE_SIZE >> 1; - zfcp_address_to_sg(address, send_els->resp, sizeof(struct zfcp_ls_adisc_acc)); - send_els->req_count = send_els->resp_count = 1; - - send_els->adapter = adapter; - send_els->port = port; - send_els->d_id = port->d_id; - send_els->handler = zfcp_erp_adisc_handler; - send_els->handler_data = (unsigned long) send_els; - - adisc = zfcp_sg_to_address(send_els->req); - send_els->ls_code = adisc->code = ZFCP_LS_ADISC; - - /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports - without FC-AL-2 capability, so we don't set it */ - adisc->wwpn = fc_host_port_name(adapter->scsi_host); - adisc->wwnn = fc_host_node_name(adapter->scsi_host); - adisc->nport_id = fc_host_port_id(adapter->scsi_host); - ZFCP_LOG_INFO("ADISC request from s_id 0x%06x to d_id 0x%06x " - "(wwpn=0x%016Lx, wwnn=0x%016Lx, " - "hard_nport_id=0x%06x, nport_id=0x%06x)\n", - adisc->nport_id, send_els->d_id, (wwn_t) adisc->wwpn, - (wwn_t) adisc->wwnn, adisc->hard_nport_id, - adisc->nport_id); - - retval = zfcp_fsf_send_els(send_els); - if (retval != 0) { - ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port " - "0x%06x on adapter %s\n", send_els->d_id, - zfcp_get_busid_by_adapter(adapter)); - goto freemem; - } + zfcp_erp_adapter_block(adapter, clear_mask); - goto out; - - nomem: - retval = -ENOMEM; - freemem: - if (address != NULL) - __free_pages(sg_page(send_els->req), 0); - if (send_els != NULL) { - kfree(send_els->req); - kfree(send_els->resp); - kfree(send_els); + /* ensure propagation of failed status to new devices */ + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_adapter_failed(adapter, 13, NULL); + return -EIO; } - out: - return retval; + return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, + adapter, NULL, NULL, id, ref); } - /** - * zfcp_erp_adisc_handler - handler for ADISC ELS command - * @data: pointer to struct zfcp_send_els - * - * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered. + * zfcp_erp_adapter_reopen - Reopen adapter. + * @adapter: Adapter to reopen. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -static void -zfcp_erp_adisc_handler(unsigned long data) +void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, + u8 id, void *ref) { - struct zfcp_send_els *send_els; - struct zfcp_port *port; - struct zfcp_adapter *adapter; - u32 d_id; - struct zfcp_ls_adisc_acc *adisc; - - send_els = (struct zfcp_send_els *) data; - adapter = send_els->adapter; - port = send_els->port; - d_id = send_els->d_id; - - /* request rejected or timed out */ - if (send_els->status != 0) { - ZFCP_LOG_NORMAL("ELS request rejected/timed out, " - "force physical port reopen " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - if (zfcp_erp_port_forced_reopen(port, 0, 63, NULL)) - ZFCP_LOG_NORMAL("failed reopen of port " - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn); - goto out; - } - - adisc = zfcp_sg_to_address(send_els->resp); - - ZFCP_LOG_INFO("ADISC response from d_id 0x%06x to s_id " - "0x%06x (wwpn=0x%016Lx, wwnn=0x%016Lx, " - "hard_nport_id=0x%06x, nport_id=0x%06x)\n", - d_id, fc_host_port_id(adapter->scsi_host), - (wwn_t) adisc->wwpn, (wwn_t) adisc->wwnn, - adisc->hard_nport_id, adisc->nport_id); - - /* set wwnn for port */ - if (port->wwnn == 0) - port->wwnn = adisc->wwnn; - - if (port->wwpn != adisc->wwpn) { - ZFCP_LOG_NORMAL("d_id assignment changed, reopening " - "port (adapter %s, wwpn=0x%016Lx, " - "adisc_resp_wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn, (wwn_t) adisc->wwpn); - if (zfcp_erp_port_reopen(port, 0, 64, NULL)) - ZFCP_LOG_NORMAL("failed reopen of port " - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn); - } + unsigned long flags; - out: - zfcp_port_put(port); - __free_pages(sg_page(send_els->req), 0); - kfree(send_els->req); - kfree(send_els->resp); - kfree(send_els); + read_lock_irqsave(&zfcp_data.config_lock, flags); + write_lock(&adapter->erp_lock); + _zfcp_erp_adapter_reopen(adapter, clear, id, ref); + write_unlock(&adapter->erp_lock); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); } - /** - * zfcp_test_link - lightweight link test procedure - * @port: port to be tested - * - * Test status of a link to a remote port using the ELS command ADISC. + * zfcp_erp_adapter_shutdown - Shutdown adapter. + * @adapter: Adapter to shut down. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -int -zfcp_test_link(struct zfcp_port *port) +void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, + u8 id, void *ref) { - int retval; - - zfcp_port_get(port); - retval = zfcp_erp_adisc(port); - if (retval != 0 && retval != -EBUSY) { - zfcp_port_put(port); - ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx " - "on adapter %s\n ", port->wwpn, - zfcp_get_busid_by_port(port)); - retval = zfcp_erp_port_forced_reopen(port, 0, 65, NULL); - if (retval != 0) { - ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx " - "on adapter %s failed\n", port->wwpn, - zfcp_get_busid_by_port(port)); - retval = -EPERM; - } - } - - return retval; + int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; + zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref); } - -/* - * function: - * - * purpose: called if a port failed to be opened normally - * initiates Forced Reopen recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action +/** + * zfcp_erp_port_shutdown - Shutdown port + * @port: Port to shut down. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port, - int clear_mask, u8 id, - void *ref) +void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, u8 id, void *ref) { - int retval; + int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; + zfcp_erp_port_reopen(port, clear | flags, id, ref); +} - ZFCP_LOG_DEBUG("forced reopen of port 0x%016Lx on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); +/** + * zfcp_erp_unit_shutdown - Shutdown unit + * @unit: Unit to shut down. + * @clear: Status flags to clear. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. + */ +void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, u8 id, void *ref) +{ + int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; + zfcp_erp_unit_reopen(unit, clear | flags, id, ref); +} - zfcp_erp_port_block(port, clear_mask); +static void zfcp_erp_port_block(struct zfcp_port *port, int clear) +{ + zfcp_erp_modify_port_status(port, 17, NULL, + ZFCP_STATUS_COMMON_UNBLOCKED | clear, + ZFCP_CLEAR); +} - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - ZFCP_LOG_DEBUG("skipped forced reopen of failed port 0x%016Lx " - "on adapter %s\n", port->wwpn, - zfcp_get_busid_by_port(port)); - retval = -EIO; - goto out; - } +static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, + int clear, u8 id, void *ref) +{ + zfcp_erp_port_block(port, clear); - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, - port->adapter, port, NULL, id, ref); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) + return; - out: - return retval; + zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, + port->adapter, port, NULL, id, ref); } -/* - * function: - * - * purpose: Wrappper for zfcp_erp_port_forced_reopen_internal - * used to ensure the correct locking - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action +/** + * zfcp_erp_port_forced_reopen - Forced close of port and open again + * @port: Port to force close and to reopen. + * @id: Id for debug trace event. + * @ref: Reference for debug trace event. */ -int zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask, u8 id, - void *ref) +void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, u8 id, + void *ref) { - int retval; unsigned long flags; - struct zfcp_adapter *adapter; + struct zfcp_adapter *adapter = port->adapter; - adapter = port->adapter; read_lock_irqsave(&zfcp_data.config_lock, flags); write_lock(&adapter->erp_lock); - retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask, id, - ref); + _zfcp_erp_port_forced_reopen(port, clear, id, ref); write_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return retval; } -/* - * function: - * - * purpose: called if a port is to be opened - * initiates Reopen recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -static int zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask, - u8 id, void *ref) +static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, + void *ref) { - int retval; - - ZFCP_LOG_DEBUG("reopen of port 0x%016Lx on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); + zfcp_erp_port_block(port, clear); - zfcp_erp_port_block(port, clear_mask); - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - ZFCP_LOG_DEBUG("skipped reopen of failed port 0x%016Lx " - "on adapter %s\n", port->wwpn, - zfcp_get_busid_by_port(port)); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { /* ensure propagation of failed status to new devices */ zfcp_erp_port_failed(port, 14, NULL); - retval = -EIO; - goto out; + return -EIO; } - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, - port->adapter, port, NULL, id, ref); - - out: - return retval; + return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, + port->adapter, port, NULL, id, ref); } /** - * zfcp_erp_port_reopen - initiate reopen of a remote port - * @port: port to be reopened - * @clear_mask: specifies flags in port status to be cleared - * Return: 0 on success, < 0 on error + * zfcp_erp_port_reopen - trigger remote port recovery + * @port: port to recover + * @clear_mask: flags in port status to be cleared * - * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures - * correct locking. An error recovery task is initiated to do the reopen. - * To wait for the completion of the reopen zfcp_erp_wait should be used. + * Returns 0 if recovery has been triggered, < 0 if not. */ -int zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask, u8 id, - void *ref) +int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, void *ref) { - int retval; unsigned long flags; + int retval; struct zfcp_adapter *adapter = port->adapter; read_lock_irqsave(&zfcp_data.config_lock, flags); write_lock(&adapter->erp_lock); - retval = zfcp_erp_port_reopen_internal(port, clear_mask, id, ref); + retval = _zfcp_erp_port_reopen(port, clear, id, ref); write_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); return retval; } -/* - * function: - * - * purpose: called if a unit is to be opened - * initiates Reopen recovery which is done - * asynchronously - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask, - u8 id, void *ref) +static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) { - int retval; - struct zfcp_adapter *adapter = unit->port->adapter; + zfcp_erp_modify_unit_status(unit, 19, NULL, + ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, + ZFCP_CLEAR); +} - ZFCP_LOG_DEBUG("reopen of unit 0x%016Lx on port 0x%016Lx " - "on adapter %s\n", unit->fcp_lun, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); +static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, + void *ref) +{ + struct zfcp_adapter *adapter = unit->port->adapter; - zfcp_erp_unit_block(unit, clear_mask); + zfcp_erp_unit_block(unit, clear); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { - ZFCP_LOG_DEBUG("skipped reopen of failed unit 0x%016Lx " - "on port 0x%016Lx on adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - retval = -EIO; - goto out; - } + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) + return; - retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, - adapter, unit->port, unit, id, ref); - out: - return retval; + zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, + adapter, unit->port, unit, id, ref); } /** @@ -643,987 +408,182 @@ static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask, * @unit: unit to be reopened * @clear_mask: specifies flags in unit status to be cleared * Return: 0 on success, < 0 on error - * - * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct - * locking. An error recovery task is initiated to do the reopen. - * To wait for the completion of the reopen zfcp_erp_wait should be used. */ -int zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask, u8 id, - void *ref) +void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, void *ref) { - int retval; unsigned long flags; - struct zfcp_adapter *adapter; - struct zfcp_port *port; - - port = unit->port; - adapter = port->adapter; + struct zfcp_port *port = unit->port; + struct zfcp_adapter *adapter = port->adapter; read_lock_irqsave(&zfcp_data.config_lock, flags); write_lock(&adapter->erp_lock); - retval = zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref); + _zfcp_erp_unit_reopen(unit, clear, id, ref); write_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return retval; } -/** - * zfcp_erp_adapter_block - mark adapter as blocked, block scsi requests - */ -static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask) -{ - zfcp_erp_modify_adapter_status(adapter, 15, NULL, - ZFCP_STATUS_COMMON_UNBLOCKED | - clear_mask, ZFCP_CLEAR); -} - -/* FIXME: isn't really atomic */ -/* - * returns the mask which has not been set so far, i.e. - * 0 if no bit has been changed, !0 if some bit has been changed - */ -static int atomic_test_and_set_mask(unsigned long mask, atomic_t *v) +static int status_change_set(unsigned long mask, atomic_t *status) { - int changed_bits = (atomic_read(v) /*XOR*/^ mask) & mask; - atomic_set_mask(mask, v); - return changed_bits; + return (atomic_read(status) ^ mask) & mask; } -/* FIXME: isn't really atomic */ -/* - * returns the mask which has not been cleared so far, i.e. - * 0 if no bit has been changed, !0 if some bit has been changed - */ -static int atomic_test_and_clear_mask(unsigned long mask, atomic_t *v) +static int status_change_clear(unsigned long mask, atomic_t *status) { - int changed_bits = atomic_read(v) & mask; - atomic_clear_mask(mask, v); - return changed_bits; + return atomic_read(status) & mask; } -/** - * zfcp_erp_adapter_unblock - mark adapter as unblocked, allow scsi requests - */ static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) { - if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &adapter->status)) + if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) zfcp_rec_dbf_event_adapter(16, NULL, adapter); + atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); } -/* - * function: - * - * purpose: disable I/O, - * return any open requests and clean them up, - * aim: no pending and incoming I/O - * - * returns: - */ -static void -zfcp_erp_port_block(struct zfcp_port *port, int clear_mask) -{ - zfcp_erp_modify_port_status(port, 17, NULL, - ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, - ZFCP_CLEAR); -} - -/* - * function: - * - * purpose: enable I/O - * - * returns: - */ -static void -zfcp_erp_port_unblock(struct zfcp_port *port) +static void zfcp_erp_port_unblock(struct zfcp_port *port) { - if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &port->status)) + if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) zfcp_rec_dbf_event_port(18, NULL, port); + atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); } -/* - * function: - * - * purpose: disable I/O, - * return any open requests and clean them up, - * aim: no pending and incoming I/O - * - * returns: - */ -static void -zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) -{ - zfcp_erp_modify_unit_status(unit, 19, NULL, - ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, - ZFCP_CLEAR); -} - -/* - * function: - * - * purpose: enable I/O - * - * returns: - */ -static void -zfcp_erp_unit_unblock(struct zfcp_unit *unit) +static void zfcp_erp_unit_unblock(struct zfcp_unit *unit) { - if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status)) + if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status)) zfcp_rec_dbf_event_unit(20, NULL, unit); + atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status); } -static void -zfcp_erp_action_ready(struct zfcp_erp_action *erp_action) +static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) { - struct zfcp_adapter *adapter = erp_action->adapter; - - zfcp_erp_action_to_ready(erp_action); - up(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(2, adapter, 0); + list_move(&erp_action->list, &erp_action->adapter->erp_running_head); + zfcp_rec_dbf_event_action(145, erp_action); } -/* - * function: - * - * purpose: - * - * returns: <0 erp_action not found in any list - * ZFCP_ERP_ACTION_READY erp_action is in ready list - * ZFCP_ERP_ACTION_RUNNING erp_action is in running list - * - * locks: erp_lock must be held - */ -static int -zfcp_erp_action_exists(struct zfcp_erp_action *erp_action) +static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) { - int retval = -EINVAL; - struct list_head *entry; - struct zfcp_erp_action *entry_erp_action; - struct zfcp_adapter *adapter = erp_action->adapter; - - /* search in running list */ - list_for_each(entry, &adapter->erp_running_head) { - entry_erp_action = - list_entry(entry, struct zfcp_erp_action, list); - if (entry_erp_action == erp_action) { - retval = ZFCP_ERP_ACTION_RUNNING; - goto out; - } - } - /* search in ready list */ - list_for_each(entry, &adapter->erp_ready_head) { - entry_erp_action = - list_entry(entry, struct zfcp_erp_action, list); - if (entry_erp_action == erp_action) { - retval = ZFCP_ERP_ACTION_READY; - goto out; - } - } + struct zfcp_adapter *adapter = act->adapter; - out: - return retval; -} - -/* - * purpose: checks current status of action (timed out, dismissed, ...) - * and does appropriate preparations (dismiss fsf request, ...) - * - * locks: called under erp_lock (disabled interrupts) - */ -static void -zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) -{ - struct zfcp_adapter *adapter = erp_action->adapter; + if (!act->fsf_req) + return; - if (erp_action->fsf_req) { - /* take lock to ensure that request is not deleted meanwhile */ - spin_lock(&adapter->req_list_lock); - if (zfcp_reqlist_find_safe(adapter, erp_action->fsf_req) && - erp_action->fsf_req->erp_action == erp_action) { - /* fsf_req still exists */ - /* dismiss fsf_req of timed out/dismissed erp_action */ - if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED | - ZFCP_STATUS_ERP_TIMEDOUT)) { - erp_action->fsf_req->status |= - ZFCP_STATUS_FSFREQ_DISMISSED; - zfcp_rec_dbf_event_action(142, erp_action); - } - if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { - zfcp_rec_dbf_event_action(143, erp_action); - ZFCP_LOG_NORMAL("error: erp step timed out " - "(action=%d, fsf_req=%p)\n ", - erp_action->action, - erp_action->fsf_req); - } - /* - * If fsf_req is neither dismissed nor completed - * then keep it running asynchronously and don't mess - * with the association of erp_action and fsf_req. - */ - if (erp_action->fsf_req->status & - (ZFCP_STATUS_FSFREQ_COMPLETED | - ZFCP_STATUS_FSFREQ_DISMISSED)) { - /* forget about association between fsf_req - and erp_action */ - erp_action->fsf_req = NULL; - } - } else { - /* - * even if this fsf_req has gone, forget about - * association between erp_action and fsf_req - */ - erp_action->fsf_req = NULL; + spin_lock(&adapter->req_list_lock); + if (zfcp_reqlist_find_safe(adapter, act->fsf_req) && + act->fsf_req->erp_action == act) { + if (act->status & (ZFCP_STATUS_ERP_DISMISSED | + ZFCP_STATUS_ERP_TIMEDOUT)) { + act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; + zfcp_rec_dbf_event_action(142, act); } - spin_unlock(&adapter->req_list_lock); - } + if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) + zfcp_rec_dbf_event_action(143, act); + if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED | + ZFCP_STATUS_FSFREQ_DISMISSED)) + act->fsf_req = NULL; + } else + act->fsf_req = NULL; + spin_unlock(&adapter->req_list_lock); } /** - * zfcp_erp_async_handler_nolock - complete erp_action - * - * Used for normal completion, time-out, dismissal and failure after - * low memory condition. + * zfcp_erp_notify - Trigger ERP action. + * @erp_action: ERP action to continue. + * @set_mask: ERP action status flags to set. */ -static void zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action, - unsigned long set_mask) -{ - if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { - erp_action->status |= set_mask; - zfcp_erp_action_ready(erp_action); - } else { - /* action is ready or gone - nothing to do */ - } -} - -/** - * zfcp_erp_async_handler - wrapper for erp_async_handler_nolock w/ locking - */ -void zfcp_erp_async_handler(struct zfcp_erp_action *erp_action, - unsigned long set_mask) +void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) { struct zfcp_adapter *adapter = erp_action->adapter; unsigned long flags; write_lock_irqsave(&adapter->erp_lock, flags); - zfcp_erp_async_handler_nolock(erp_action, set_mask); - write_unlock_irqrestore(&adapter->erp_lock, flags); -} - -/* - * purpose: is called for erp_action which was slept waiting for - * memory becoming avaliable, - * will trigger that this action will be continued - */ -static void -zfcp_erp_memwait_handler(unsigned long data) -{ - struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; - - zfcp_erp_async_handler(erp_action, 0); -} - -/* - * purpose: is called if an asynchronous erp step timed out, - * action gets an appropriate flag and will be processed - * accordingly - */ -static void zfcp_erp_timeout_handler(unsigned long data) -{ - struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; - - zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT); -} - -/** - * zfcp_erp_action_dismiss - dismiss an erp_action - * - * adapter->erp_lock must be held - * - * Dismissal of an erp_action is usually required if an erp_action of - * higher priority is generated. - */ -static void zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action) -{ - erp_action->status |= ZFCP_STATUS_ERP_DISMISSED; - if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) + if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { + erp_action->status |= set_mask; zfcp_erp_action_ready(erp_action); -} - -int -zfcp_erp_thread_setup(struct zfcp_adapter *adapter) -{ - int retval = 0; - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); - - retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); - if (retval < 0) { - ZFCP_LOG_NORMAL("error: creation of erp thread failed for " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - } else { - wait_event(adapter->erp_thread_wqh, - atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, - &adapter->status)); } - - return (retval < 0); -} - -/* - * function: - * - * purpose: - * - * returns: - * - * context: process (i.e. proc-fs or rmmod/insmod) - * - * note: The caller of this routine ensures that the specified - * adapter has been shut down and that this operation - * has been completed. Thus, there are no pending erp_actions - * which would need to be handled here. - */ -int -zfcp_erp_thread_kill(struct zfcp_adapter *adapter) -{ - int retval = 0; - - atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); - up(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(2, adapter, 1); - - wait_event(adapter->erp_thread_wqh, - !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, - &adapter->status)); - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, - &adapter->status); - - return retval; -} - -/* - * purpose: is run as a kernel thread, - * goes through list of error recovery actions of associated adapter - * and delegates single action to execution - * - * returns: 0 - */ -static int -zfcp_erp_thread(void *data) -{ - struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; - struct list_head *next; - struct zfcp_erp_action *erp_action; - unsigned long flags; - - daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter)); - /* Block all signals */ - siginitsetinv(¤t->blocked, 0); - atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); - wake_up(&adapter->erp_thread_wqh); - - while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, - &adapter->status)) { - - write_lock_irqsave(&adapter->erp_lock, flags); - next = adapter->erp_ready_head.next; - write_unlock_irqrestore(&adapter->erp_lock, flags); - - if (next != &adapter->erp_ready_head) { - erp_action = - list_entry(next, struct zfcp_erp_action, list); - /* - * process action (incl. [re]moving it - * from 'ready' queue) - */ - zfcp_erp_strategy(erp_action); - } - - /* - * sleep as long as there is nothing to do, i.e. - * no action in 'ready' queue to be processed and - * thread is not to be killed - */ - zfcp_rec_dbf_event_thread(4, adapter, 1); - down_interruptible(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(5, adapter, 1); - } - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); - wake_up(&adapter->erp_thread_wqh); - - return 0; -} - -/* - * function: - * - * purpose: drives single error recovery action and schedules higher and - * subordinate actions, if necessary - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully (deqd) - * ZFCP_ERP_FAILED - action finished unsuccessfully (deqd) - * ZFCP_ERP_EXIT - action finished (dequeued), offline - * ZFCP_ERP_DISMISSED - action canceled (dequeued) - */ -static int -zfcp_erp_strategy(struct zfcp_erp_action *erp_action) -{ - int retval = 0; - struct zfcp_adapter *adapter = erp_action->adapter; - struct zfcp_port *port = erp_action->port; - struct zfcp_unit *unit = erp_action->unit; - int action = erp_action->action; - u32 status = erp_action->status; - unsigned long flags; - - /* serialise dismissing, timing out, moving, enqueueing */ - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - - /* dequeue dismissed action and leave, if required */ - retval = zfcp_erp_strategy_check_action(erp_action, retval); - if (retval == ZFCP_ERP_DISMISSED) { - goto unlock; - } - - /* - * move action to 'running' queue before processing it - * (to avoid a race condition regarding moving the - * action to the 'running' queue and back) - */ - zfcp_erp_action_to_running(erp_action); - - /* - * try to process action as far as possible, - * no lock to allow for blocking operations (kmalloc, qdio, ...), - * afterwards the lock is required again for the following reasons: - * - dequeueing of finished action and enqueueing of - * follow-up actions must be atomic so that any other - * reopen-routine does not believe there is nothing to do - * and that it is safe to enqueue something else, - * - we want to force any control thread which is dismissing - * actions to finish this before we decide about - * necessary steps to be taken here further - */ - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - retval = zfcp_erp_strategy_do_action(erp_action); - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - - /* - * check for dismissed status again to avoid follow-up actions, - * failing of targets and so on for dismissed actions, - * we go through down() here because there has been an up() - */ - if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) - retval = ZFCP_ERP_CONTINUES; - - switch (retval) { - case ZFCP_ERP_NOMEM: - /* no memory to continue immediately, let it sleep */ - if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { - ++adapter->erp_low_mem_count; - erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; - } - /* This condition is true if there is no memory available - for any erp_action on this adapter. This implies that there - are no elements in the memory pool(s) left for erp_actions. - This might happen if an erp_action that used a memory pool - element was timed out. - */ - if (adapter->erp_total_count == adapter->erp_low_mem_count) { - ZFCP_LOG_NORMAL("error: no mempool elements available, " - "restarting I/O on adapter %s " - "to free mempool\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_reopen_internal(adapter, 0, 66, NULL); - } else { - retval = zfcp_erp_strategy_memwait(erp_action); - } - goto unlock; - case ZFCP_ERP_CONTINUES: - /* leave since this action runs asynchronously */ - if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { - --adapter->erp_low_mem_count; - erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; - } - goto unlock; - } - /* ok, finished action (whatever its result is) */ - - /* check for unrecoverable targets */ - retval = zfcp_erp_strategy_check_target(erp_action, retval); - - /* action must be dequeued (here to allow for further ones) */ - zfcp_erp_action_dequeue(erp_action); - - /* - * put this target through the erp mill again if someone has - * requested to change the status of a target being online - * to offline or the other way around - * (old retval is preserved if nothing has to be done here) - */ - retval = zfcp_erp_strategy_statechange(action, status, adapter, - port, unit, retval); - - /* - * leave if target is in permanent error state or if - * action is repeated in order to process state change - */ - if (retval == ZFCP_ERP_EXIT) { - goto unlock; - } - - /* trigger follow up actions */ - zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval); - - unlock: - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (retval != ZFCP_ERP_CONTINUES) - zfcp_erp_action_cleanup(action, adapter, port, unit, retval); - - /* - * a few tasks remain when the erp queues are empty - * (don't do that if the last action evaluated was dismissed - * since this clearly indicates that there is more to come) : - * - close the name server port if it is open yet - * (enqueues another [probably] final action) - * - otherwise, wake up whoever wants to be woken when we are - * done with erp - */ - if (retval != ZFCP_ERP_DISMISSED) - zfcp_erp_strategy_check_queues(adapter); - - return retval; + write_unlock_irqrestore(&adapter->erp_lock, flags); } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_DISMISSED - if action has been dismissed - * retval - otherwise +/** + * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request + * @data: ERP action (from timer data) */ -static int -zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval) +void zfcp_erp_timeout_handler(unsigned long data) { - zfcp_erp_strategy_check_fsfreq(erp_action); - - if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { - zfcp_erp_action_dequeue(erp_action); - retval = ZFCP_ERP_DISMISSED; - } - - return retval; + struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; + zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); } -static int -zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) +static void zfcp_erp_memwait_handler(unsigned long data) { - int retval = ZFCP_ERP_FAILED; - - /* - * try to execute/continue action as far as possible, - * note: no lock in subsequent strategy routines - * (this allows these routine to call schedule, e.g. - * kmalloc with such flags or qdio_initialize & friends) - * Note: in case of timeout, the separate strategies will fail - * anyhow. No need for a special action. Even worse, a nameserver - * failure would not wake up waiting ports without the call. - */ - switch (erp_action->action) { - - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - retval = zfcp_erp_adapter_strategy(erp_action); - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - retval = zfcp_erp_port_forced_strategy(erp_action); - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT: - retval = zfcp_erp_port_strategy(erp_action); - break; - - case ZFCP_ERP_ACTION_REOPEN_UNIT: - retval = zfcp_erp_unit_strategy(erp_action); - break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp action requested on " - "adapter %s (action=%d)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->action); - } - - return retval; + zfcp_erp_notify((struct zfcp_erp_action *)data, 0); } -/* - * function: - * - * purpose: triggers retry of this action after a certain amount of time - * by means of timer provided by erp_action - * - * returns: ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue - */ -static int -zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) +static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_CONTINUES; - init_timer(&erp_action->timer); erp_action->timer.function = zfcp_erp_memwait_handler; erp_action->timer.data = (unsigned long) erp_action; - erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT; + erp_action->timer.expires = jiffies + HZ; add_timer(&erp_action->timer); - - return retval; } -/* - * function: zfcp_erp_adapter_failed - * - * purpose: sets the adapter and all underlying devices to ERP_FAILED - * - */ -void -zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref) -{ - zfcp_erp_modify_adapter_status(adapter, id, ref, - ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); - ZFCP_LOG_NORMAL("adapter erp failed on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); -} - -/* - * function: zfcp_erp_port_failed - * - * purpose: sets the port and all underlying devices to ERP_FAILED - * - */ -void -zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref) -{ - zfcp_erp_modify_port_status(port, id, ref, - ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); - - if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) - ZFCP_LOG_NORMAL("port erp failed (adapter %s, " - "port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - else - ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), port->wwpn); -} - -/* - * function: zfcp_erp_unit_failed - * - * purpose: sets the unit to ERP_FAILED - * - */ -void -zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref) -{ - zfcp_erp_modify_unit_status(unit, id, ref, - ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); - - ZFCP_LOG_NORMAL("unit erp failed on unit 0x%016Lx on port 0x%016Lx " - " on adapter %s\n", unit->fcp_lun, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); -} - -/* - * function: zfcp_erp_strategy_check_target - * - * purpose: increments the erp action count on the device currently in - * recovery if the action failed or resets the count in case of - * success. If a maximum count is exceeded the device is marked - * as ERP_FAILED. - * The 'blocked' state of a target which has been recovered - * successfully is reset. - * - * returns: ZFCP_ERP_CONTINUES - action continues (not considered) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_EXIT - action failed and will not continue - */ -static int -zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result) -{ - struct zfcp_adapter *adapter = erp_action->adapter; - struct zfcp_port *port = erp_action->port; - struct zfcp_unit *unit = erp_action->unit; - - switch (erp_action->action) { - - case ZFCP_ERP_ACTION_REOPEN_UNIT: - result = zfcp_erp_strategy_check_unit(unit, result); - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - case ZFCP_ERP_ACTION_REOPEN_PORT: - result = zfcp_erp_strategy_check_port(port, result); - break; - - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - result = zfcp_erp_strategy_check_adapter(adapter, result); - break; - } - - return result; -} - -static int -zfcp_erp_strategy_statechange(int action, - u32 status, - struct zfcp_adapter *adapter, - struct zfcp_port *port, - struct zfcp_unit *unit, int retval) -{ - switch (action) { - - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - if (zfcp_erp_strategy_statechange_detected(&adapter->status, - status)) { - zfcp_erp_adapter_reopen_internal(adapter, - ZFCP_STATUS_COMMON_ERP_FAILED, - 67, NULL); - retval = ZFCP_ERP_EXIT; - } - break; - - case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - case ZFCP_ERP_ACTION_REOPEN_PORT: - if (zfcp_erp_strategy_statechange_detected(&port->status, - status)) { - zfcp_erp_port_reopen_internal(port, - ZFCP_STATUS_COMMON_ERP_FAILED, - 68, NULL); - retval = ZFCP_ERP_EXIT; - } - break; - - case ZFCP_ERP_ACTION_REOPEN_UNIT: - if (zfcp_erp_strategy_statechange_detected(&unit->status, - status)) { - zfcp_erp_unit_reopen_internal(unit, - ZFCP_STATUS_COMMON_ERP_FAILED, - 69, NULL); - retval = ZFCP_ERP_EXIT; - } - break; - } - - return retval; -} - -static int -zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status) +static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, + int clear, u8 id, void *ref) { - return - /* take it online */ - (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && - (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) || - /* take it offline */ - (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && - !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)); -} - -static int -zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) -{ - switch (result) { - case ZFCP_ERP_SUCCEEDED : - atomic_set(&unit->erp_counter, 0); - zfcp_erp_unit_unblock(unit); - break; - case ZFCP_ERP_FAILED : - atomic_inc(&unit->erp_counter); - if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) - zfcp_erp_unit_failed(unit, 21, NULL); - break; - case ZFCP_ERP_EXIT : - /* nothing */ - break; - } - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { - zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */ - result = ZFCP_ERP_EXIT; - } - - return result; -} - -static int -zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) -{ - switch (result) { - case ZFCP_ERP_SUCCEEDED : - atomic_set(&port->erp_counter, 0); - zfcp_erp_port_unblock(port); - break; - case ZFCP_ERP_FAILED : - atomic_inc(&port->erp_counter); - if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) - zfcp_erp_port_failed(port, 22, NULL); - break; - case ZFCP_ERP_EXIT : - /* nothing */ - break; - } - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */ - result = ZFCP_ERP_EXIT; - } + struct zfcp_port *port; - return result; + list_for_each_entry(port, &adapter->port_list_head, list) + if (!(atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA)) + _zfcp_erp_port_reopen(port, clear, id, ref); } -static int -zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result) +static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear, u8 id, + void *ref) { - switch (result) { - case ZFCP_ERP_SUCCEEDED : - atomic_set(&adapter->erp_counter, 0); - zfcp_erp_adapter_unblock(adapter); - break; - case ZFCP_ERP_FAILED : - atomic_inc(&adapter->erp_counter); - if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) - zfcp_erp_adapter_failed(adapter, 23, NULL); - break; - case ZFCP_ERP_EXIT : - /* nothing */ - break; - } - - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { - zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */ - result = ZFCP_ERP_EXIT; - } - - return result; -} - -struct zfcp_erp_add_work { - struct zfcp_unit *unit; - struct work_struct work; -}; + struct zfcp_unit *unit; -/** - * zfcp_erp_scsi_scan - * @data: pointer to a struct zfcp_erp_add_work - * - * Registers a logical unit with the SCSI stack. - */ -static void zfcp_erp_scsi_scan(struct work_struct *work) -{ - struct zfcp_erp_add_work *p = - container_of(work, struct zfcp_erp_add_work, work); - struct zfcp_unit *unit = p->unit; - struct fc_rport *rport = unit->port->rport; - scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, - unit->scsi_lun, 0); - atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); - zfcp_unit_put(unit); - kfree(p); + list_for_each_entry(unit, &port->unit_list_head, list) + _zfcp_erp_unit_reopen(unit, clear, id, ref); } -/** - * zfcp_erp_schedule_work - * @unit: pointer to unit which should be registered with SCSI stack - * - * Schedules work which registers a unit with the SCSI stack - */ -static void -zfcp_erp_schedule_work(struct zfcp_unit *unit) +static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act) { - struct zfcp_erp_add_work *p; + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_unit *unit = act->unit; + u32 status = act->status; - p = kzalloc(sizeof(*p), GFP_KERNEL); - if (!p) { - ZFCP_LOG_NORMAL("error: Out of resources. Could not register " - "the FCP-LUN 0x%Lx connected to " - "the port with WWPN 0x%Lx connected to " - "the adapter %s with the SCSI stack.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - return; - } - - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); - INIT_WORK(&p->work, zfcp_erp_scsi_scan); - p->unit = unit; - schedule_work(&p->work); -} - -/* - * function: - * - * purpose: remaining things in good cases, - * escalation in bad cases - * - * returns: - */ -static int -zfcp_erp_strategy_followup_actions(int action, - struct zfcp_adapter *adapter, - struct zfcp_port *port, - struct zfcp_unit *unit, int status) -{ /* initiate follow-up actions depending on success of finished action */ - switch (action) { + switch (act->action) { case ZFCP_ERP_ACTION_REOPEN_ADAPTER: if (status == ZFCP_ERP_SUCCEEDED) - zfcp_erp_port_reopen_all_internal(adapter, 0, 70, NULL); + _zfcp_erp_port_reopen_all(adapter, 0, 70, NULL); else - zfcp_erp_adapter_reopen_internal(adapter, 0, 71, NULL); + _zfcp_erp_adapter_reopen(adapter, 0, 71, NULL); break; case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: if (status == ZFCP_ERP_SUCCEEDED) - zfcp_erp_port_reopen_internal(port, 0, 72, NULL); + _zfcp_erp_port_reopen(port, 0, 72, NULL); else - zfcp_erp_adapter_reopen_internal(adapter, 0, 73, NULL); + _zfcp_erp_adapter_reopen(adapter, 0, 73, NULL); break; case ZFCP_ERP_ACTION_REOPEN_PORT: if (status == ZFCP_ERP_SUCCEEDED) - zfcp_erp_unit_reopen_all_internal(port, 0, 74, NULL); + _zfcp_erp_unit_reopen_all(port, 0, 74, NULL); else - zfcp_erp_port_forced_reopen_internal(port, 0, 75, NULL); + _zfcp_erp_port_forced_reopen(port, 0, 75, NULL); break; case ZFCP_ERP_ACTION_REOPEN_UNIT: - /* Nothing to do if status == ZFCP_ERP_SUCCEEDED */ if (status != ZFCP_ERP_SUCCEEDED) - zfcp_erp_port_reopen_internal(unit->port, 0, 76, NULL); + _zfcp_erp_port_reopen(unit->port, 0, 76, NULL); break; } - - return 0; } -static int -zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) +static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) { unsigned long flags; @@ -1637,1277 +597,622 @@ zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) } read_unlock(&adapter->erp_lock); read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return 0; } -/** - * zfcp_erp_wait - wait for completion of error recovery on an adapter - * @adapter: adapter for which to wait for completion of its error recovery - * Return: 0 - */ -int -zfcp_erp_wait(struct zfcp_adapter *adapter) +static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act) { - int retval = 0; - - wait_event(adapter->erp_done_wqh, - !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, - &adapter->status)); - - return retval; + if (zfcp_qdio_open(act->adapter)) + return ZFCP_ERP_FAILED; + init_waitqueue_head(&act->adapter->request_wq); + atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status); + return ZFCP_ERP_SUCCEEDED; } -void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id, - void *ref, u32 mask, int set_or_clear) +static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) { struct zfcp_port *port; - u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS; - - if (set_or_clear == ZFCP_SET) { - changed = atomic_test_and_set_mask(mask, &adapter->status); - } else { - changed = atomic_test_and_clear_mask(mask, &adapter->status); - if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) - atomic_set(&adapter->erp_counter, 0); - } - if (changed) - zfcp_rec_dbf_event_adapter(id, ref, adapter); - - /* Deal with all underlying devices, only pass common_mask */ - if (common_mask) - list_for_each_entry(port, &adapter->port_list_head, list) - zfcp_erp_modify_port_status(port, id, ref, common_mask, - set_or_clear); + port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, + adapter->peer_d_id); + if (IS_ERR(port)) /* error or port already attached */ + return; + _zfcp_erp_port_reopen(port, 0, 150, NULL); } -/* - * function: zfcp_erp_modify_port_status - * - * purpose: sets the port and all underlying devices to ERP_FAILED - * - */ -void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref, - u32 mask, int set_or_clear) +static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) { - struct zfcp_unit *unit; - u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS; - - if (set_or_clear == ZFCP_SET) { - changed = atomic_test_and_set_mask(mask, &port->status); - } else { - changed = atomic_test_and_clear_mask(mask, &port->status); - if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) - atomic_set(&port->erp_counter, 0); - } - if (changed) - zfcp_rec_dbf_event_port(id, ref, port); - - /* Modify status of all underlying devices, only pass common mask */ - if (common_mask) - list_for_each_entry(unit, &port->unit_list_head, list) - zfcp_erp_modify_unit_status(unit, id, ref, common_mask, - set_or_clear); -} + int retries; + int sleep = 1; + struct zfcp_adapter *adapter = erp_action->adapter; -/* - * function: zfcp_erp_modify_unit_status - * - * purpose: sets the unit to ERP_FAILED - * - */ -void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref, - u32 mask, int set_or_clear) -{ - u32 changed; + atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); - if (set_or_clear == ZFCP_SET) { - changed = atomic_test_and_set_mask(mask, &unit->status); - } else { - changed = atomic_test_and_clear_mask(mask, &unit->status); - if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { - atomic_set(&unit->erp_counter, 0); + for (retries = 7; retries; retries--) { + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); + write_lock_irq(&adapter->erp_lock); + zfcp_erp_action_to_running(erp_action); + write_unlock_irq(&adapter->erp_lock); + if (zfcp_fsf_exchange_config_data(erp_action)) { + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); + return ZFCP_ERP_FAILED; } - } - if (changed) - zfcp_rec_dbf_event_unit(id, ref, unit); -} -/* - * function: - * - * purpose: Wrappper for zfcp_erp_port_reopen_all_internal - * used to ensure the correct locking - * - * returns: 0 - initiated action successfully - * <0 - failed to initiate action - */ -int zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask, - u8 id, void *ref) -{ - int retval; - unsigned long flags; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - write_lock(&adapter->erp_lock); - retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask, id, - ref); - write_unlock(&adapter->erp_lock); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - return retval; -} + zfcp_rec_dbf_event_thread_lock(6, adapter); + down(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread_lock(7, adapter); + if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) + break; -static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter, - int clear_mask, u8 id, void *ref) -{ - int retval = 0; - struct zfcp_port *port; + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) + break; - list_for_each_entry(port, &adapter->port_list_head, list) - if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) - zfcp_erp_port_reopen_internal(port, clear_mask, id, - ref); + ssleep(sleep); + sleep *= 2; + } - return retval; -} + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); -/* - * function: - * - * purpose: - * - * returns: FIXME - */ -static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port, - int clear_mask, u8 id, void *ref) -{ - int retval = 0; - struct zfcp_unit *unit; + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) + return ZFCP_ERP_FAILED; - list_for_each_entry(unit, &port->unit_list_head, list) - zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref); + if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) + zfcp_erp_enqueue_ptp_port(adapter); - return retval; + return ZFCP_ERP_SUCCEEDED; } -/* - * function: - * - * purpose: this routine executes the 'Reopen Adapter' action - * (the entire action is processed synchronously, since - * there are no actions which might be run concurrently - * per definition) - * - * returns: ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action) +static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) { - int retval; - struct zfcp_adapter *adapter = erp_action->adapter; - - retval = zfcp_erp_adapter_strategy_close(erp_action); - if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) - retval = ZFCP_ERP_EXIT; - else - retval = zfcp_erp_adapter_strategy_open(erp_action); + int ret; + struct zfcp_adapter *adapter = act->adapter; - if (retval == ZFCP_ERP_FAILED) { - ZFCP_LOG_INFO("Waiting to allow the adapter %s " - "to recover itself\n", - zfcp_get_busid_by_adapter(adapter)); - ssleep(ZFCP_TYPE2_RECOVERY_TIME); - } + atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - return retval; -} + write_lock_irq(&adapter->erp_lock); + zfcp_erp_action_to_running(act); + write_unlock_irq(&adapter->erp_lock); -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action) -{ - int retval; + ret = zfcp_fsf_exchange_port_data(act); + if (ret == -EOPNOTSUPP) + return ZFCP_ERP_SUCCEEDED; + if (ret) + return ZFCP_ERP_FAILED; - atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, - &erp_action->adapter->status); - retval = zfcp_erp_adapter_strategy_generic(erp_action, 1); - atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, - &erp_action->adapter->status); + zfcp_rec_dbf_event_thread_lock(8, adapter); + down(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread_lock(9, adapter); + if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) + return ZFCP_ERP_FAILED; - return retval; + return ZFCP_ERP_SUCCEEDED; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action) +static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) { - int retval; + if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) + return ZFCP_ERP_FAILED; - atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, - &erp_action->adapter->status); - retval = zfcp_erp_adapter_strategy_generic(erp_action, 0); - atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, - &erp_action->adapter->status); + if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) + return ZFCP_ERP_FAILED; - return retval; + atomic_set(&act->adapter->stat_miss, 16); + if (zfcp_status_read_refill(act->adapter)) + return ZFCP_ERP_FAILED; + + return ZFCP_ERP_SUCCEEDED; } -/* - * function: zfcp_register_adapter - * - * purpose: allocate the irq associated with this devno and register - * the FSF adapter with the SCSI stack - * - * returns: - */ -static int -zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) +static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *act, + int close) { int retval = ZFCP_ERP_SUCCEEDED; + struct zfcp_adapter *adapter = act->adapter; if (close) goto close_only; - retval = zfcp_erp_adapter_strategy_open_qdio(erp_action); + retval = zfcp_erp_adapter_strategy_open_qdio(act); if (retval != ZFCP_ERP_SUCCEEDED) goto failed_qdio; - retval = zfcp_erp_adapter_strategy_open_fsf(erp_action); + retval = zfcp_erp_adapter_strategy_open_fsf(act); if (retval != ZFCP_ERP_SUCCEEDED) goto failed_openfcp; - atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status); - goto out; + atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &act->adapter->status); + schedule_work(&act->adapter->scan_work); + + return ZFCP_ERP_SUCCEEDED; close_only: atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, - &erp_action->adapter->status); + &act->adapter->status); failed_openfcp: - zfcp_close_fsf(erp_action->adapter); + /* close queues to ensure that buffers are not accessed by adapter */ + zfcp_qdio_close(adapter); + zfcp_fsf_req_dismiss_all(adapter); + adapter->fsf_req_seq_no = 0; + /* all ports and units are closed */ + zfcp_erp_modify_adapter_status(adapter, 24, NULL, + ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); failed_qdio: atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | ZFCP_STATUS_ADAPTER_XPORT_OK, - &erp_action->adapter->status); - out: + &act->adapter->status); return retval; } -/* - * function: zfcp_qdio_init - * - * purpose: setup QDIO operation for specified adapter - * - * returns: 0 - successful setup - * !0 - failed setup - */ -static int -zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) +static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) { int retval; - int i; - volatile struct qdio_buffer_element *sbale; - struct zfcp_adapter *adapter = erp_action->adapter; - - if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { - ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_sanity; - } - - if (qdio_establish(&adapter->qdio_init_data) != 0) { - ZFCP_LOG_INFO("error: establishment of QDIO queues failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_qdio_establish; - } - - if (qdio_activate(adapter->ccw_device, 0) != 0) { - ZFCP_LOG_INFO("error: activation of QDIO queues failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_qdio_activate; - } - - /* - * put buffers into response queue, - */ - for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { - sbale = &(adapter->response_queue.buffer[i]->element[0]); - sbale->length = 0; - sbale->flags = SBAL_FLAGS_LAST_ENTRY; - sbale->addr = NULL; - } - - ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " - "queue_no=%i, index_in_queue=%i, count=%i)\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q); - - retval = do_QDIO(adapter->ccw_device, - QDIO_FLAG_SYNC_INPUT, - 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL); - - if (retval) { - ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n", - retval); - goto failed_do_qdio; - } else { - adapter->response_queue.free_index = 0; - atomic_set(&adapter->response_queue.free_count, 0); - ZFCP_LOG_DEBUG("%i buffers successfully enqueued to " - "response queue\n", QDIO_MAX_BUFFERS_PER_Q); - } - /* set index of first avalable SBALS / number of available SBALS */ - adapter->request_queue.free_index = 0; - atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q); - adapter->request_queue.distance_from_int = 0; - - /* initialize waitqueue used to wait for free SBALs in requests queue */ - init_waitqueue_head(&adapter->request_wq); - /* ok, we did it - skip all cleanups for different failures */ - atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); - retval = ZFCP_ERP_SUCCEEDED; - goto out; + atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &act->adapter->status); + zfcp_erp_adapter_strategy_generic(act, 1); /* close */ + atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &act->adapter->status); + if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) + return ZFCP_ERP_EXIT; - failed_do_qdio: - /* NOP */ + atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &act->adapter->status); + retval = zfcp_erp_adapter_strategy_generic(act, 0); /* open */ + atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &act->adapter->status); - failed_qdio_activate: - while (qdio_shutdown(adapter->ccw_device, - QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - ssleep(1); - - failed_qdio_establish: - failed_sanity: - retval = ZFCP_ERP_FAILED; + if (retval == ZFCP_ERP_FAILED) + ssleep(8); - out: return retval; } - -static int -zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) { int retval; - retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action); - if (retval == ZFCP_ERP_FAILED) + retval = zfcp_fsf_close_physical_port(act); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; + if (retval) return ZFCP_ERP_FAILED; - retval = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action); - if (retval == ZFCP_ERP_FAILED) - return ZFCP_ERP_FAILED; - - return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action); + return ZFCP_ERP_CONTINUES; } -static int -zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) +static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) { - int retval = ZFCP_ERP_SUCCEEDED; - int retries; - int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; - struct zfcp_adapter *adapter = erp_action->adapter; - - atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); - - for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) { - atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status); - ZFCP_LOG_DEBUG("Doing exchange config data\n"); - write_lock_irq(&adapter->erp_lock); - zfcp_erp_action_to_running(erp_action); - write_unlock_irq(&adapter->erp_lock); - if (zfcp_fsf_exchange_config_data(erp_action)) { - retval = ZFCP_ERP_FAILED; - ZFCP_LOG_INFO("error: initiation of exchange of " - "configuration data failed for " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - break; - } - ZFCP_LOG_DEBUG("Xchange underway\n"); - - /* - * Why this works: - * Both the normal completion handler as well as the timeout - * handler will do an 'up' when the 'exchange config data' - * request completes or times out. Thus, the signal to go on - * won't be lost utilizing this semaphore. - * Furthermore, this 'adapter_reopen' action is - * guaranteed to be the only action being there (highest action - * which prevents other actions from being created). - * Resulting from that, the wake signal recognized here - * _must_ be the one belonging to the 'exchange config - * data' request. - */ - zfcp_rec_dbf_event_thread(6, adapter, 1); - down(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(7, adapter, 1); - if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { - ZFCP_LOG_INFO("error: exchange of configuration data " - "for adapter %s timed out\n", - zfcp_get_busid_by_adapter(adapter)); - break; - } - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status)) - break; + atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | + ZFCP_STATUS_COMMON_CLOSING | + ZFCP_STATUS_COMMON_ACCESS_DENIED | + ZFCP_STATUS_PORT_DID_DID | + ZFCP_STATUS_PORT_PHYS_CLOSING | + ZFCP_STATUS_PORT_INVALID_WWPN, + &port->status); +} - ZFCP_LOG_DEBUG("host connection still initialising... " - "waiting and retrying...\n"); - /* sleep a little bit before retry */ - ssleep(sleep); - sleep *= 2; - } +static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) +{ + struct zfcp_port *port = erp_action->port; + int status = atomic_read(&port->status); - atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status); + switch (erp_action->step) { + case ZFCP_ERP_STEP_UNINITIALIZED: + zfcp_erp_port_strategy_clearstati(port); + if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && + (status & ZFCP_STATUS_COMMON_OPEN)) + return zfcp_erp_port_forced_strategy_close(erp_action); + else + return ZFCP_ERP_FAILED; - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, - &adapter->status)) { - ZFCP_LOG_INFO("error: exchange of configuration data for " - "adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); - retval = ZFCP_ERP_FAILED; + case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: + if (status & ZFCP_STATUS_PORT_PHYS_OPEN) + return ZFCP_ERP_SUCCEEDED; } - - return retval; + return ZFCP_ERP_FAILED; } -static int -zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) { - int ret; - struct zfcp_adapter *adapter; - - adapter = erp_action->adapter; - atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - - write_lock_irq(&adapter->erp_lock); - zfcp_erp_action_to_running(erp_action); - write_unlock_irq(&adapter->erp_lock); + int retval; - ret = zfcp_fsf_exchange_port_data(erp_action); - if (ret == -EOPNOTSUPP) { - return ZFCP_ERP_SUCCEEDED; - } else if (ret) { + retval = zfcp_fsf_close_port(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; + if (retval) return ZFCP_ERP_FAILED; - } - - ret = ZFCP_ERP_SUCCEEDED; - zfcp_rec_dbf_event_thread(8, adapter, 1); - down(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(9, adapter, 1); - if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { - ZFCP_LOG_INFO("error: exchange port data timed out (adapter " - "%s)\n", zfcp_get_busid_by_adapter(adapter)); - ret = ZFCP_ERP_FAILED; - } - - /* don't treat as error for the sake of compatibility */ - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status)) - ZFCP_LOG_INFO("warning: exchange port data failed (adapter " - "%s\n", zfcp_get_busid_by_adapter(adapter)); - - return ret; + return ZFCP_ERP_CONTINUES; } -static int -zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action - *erp_action) +static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_SUCCEEDED; - int temp_ret; - struct zfcp_adapter *adapter = erp_action->adapter; - int i; - - adapter->status_read_failed = 0; - for (i = 0; i < ZFCP_STATUS_READS_RECOM; i++) { - temp_ret = zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL); - if (temp_ret < 0) { - ZFCP_LOG_INFO("error: set-up of unsolicited status " - "notification failed on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = ZFCP_ERP_FAILED; - i--; - break; - } - } + int retval; - return retval; + retval = zfcp_fsf_open_port(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -/* - * function: - * - * purpose: this routine executes the 'Reopen Physical Port' action - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) +static void zfcp_erp_port_strategy_open_ns_wake(struct zfcp_erp_action *ns_act) { - int retval = ZFCP_ERP_FAILED; - struct zfcp_port *port = erp_action->port; - - switch (erp_action->step) { - - /* - * FIXME: - * the ULP spec. begs for waiting for oustanding commands - */ - case ZFCP_ERP_STEP_UNINITIALIZED: - zfcp_erp_port_strategy_clearstati(port); - /* - * it would be sufficient to test only the normal open flag - * since the phys. open flag cannot be set if the normal - * open flag is unset - however, this is for readabilty ... - */ - if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN | - ZFCP_STATUS_COMMON_OPEN), - &port->status)) { - ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " - "close physical\n", port->wwpn); - retval = - zfcp_erp_port_forced_strategy_close(erp_action); - } else - retval = ZFCP_ERP_FAILED; - break; + unsigned long flags; + struct zfcp_adapter *adapter = ns_act->adapter; + struct zfcp_erp_action *act, *tmp; + int status; - case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: - if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN, - &port->status)) { - ZFCP_LOG_DEBUG("close physical failed for port " - "0x%016Lx\n", port->wwpn); - retval = ZFCP_ERP_FAILED; - } else - retval = ZFCP_ERP_SUCCEEDED; - break; + read_lock_irqsave(&adapter->erp_lock, flags); + list_for_each_entry_safe(act, tmp, &adapter->erp_running_head, list) { + if (act->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { + status = atomic_read(&adapter->nameserver_port->status); + if (status & ZFCP_STATUS_COMMON_ERP_FAILED) + zfcp_erp_port_failed(act->port, 27, NULL); + zfcp_erp_action_ready(act); + } } - - return retval; + read_unlock_irqrestore(&adapter->erp_lock, flags); } -/* - * function: - * - * purpose: this routine executes the 'Reopen Port' action - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *act) { - int retval = ZFCP_ERP_FAILED; - struct zfcp_port *port = erp_action->port; - - switch (erp_action->step) { + int retval; - /* - * FIXME: - * the ULP spec. begs for waiting for oustanding commands - */ + switch (act->step) { case ZFCP_ERP_STEP_UNINITIALIZED: - zfcp_erp_port_strategy_clearstati(port); - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { - ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " - "close\n", port->wwpn); - retval = zfcp_erp_port_strategy_close(erp_action); - goto out; - } /* else it's already closed, open it */ - break; - + case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: case ZFCP_ERP_STEP_PORT_CLOSING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { - ZFCP_LOG_DEBUG("close failed for port 0x%016Lx\n", - port->wwpn); + return zfcp_erp_port_strategy_open_port(act); + + case ZFCP_ERP_STEP_PORT_OPENING: + if (atomic_read(&act->port->status) & ZFCP_STATUS_COMMON_OPEN) + retval = ZFCP_ERP_SUCCEEDED; + else retval = ZFCP_ERP_FAILED; - goto out; - } /* else it's closed now, open it */ - break; - } - if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) - retval = ZFCP_ERP_EXIT; - else - retval = zfcp_erp_port_strategy_open(erp_action); + /* this is needed anyway */ + zfcp_erp_port_strategy_open_ns_wake(act); + return retval; - out: - return retval; + default: + return ZFCP_ERP_FAILED; + } } -static int -zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy_open_lookup(struct zfcp_erp_action *act) { int retval; - if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, - &erp_action->port->status)) - retval = zfcp_erp_port_strategy_open_nameserver(erp_action); - else - retval = zfcp_erp_port_strategy_open_common(erp_action); - - return retval; + retval = zfcp_fc_ns_gid_pn_request(act); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + act->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -static int -zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action) +static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) { - int retval = 0; - struct zfcp_adapter *adapter = erp_action->adapter; - struct zfcp_port *port = erp_action->port; + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; - switch (erp_action->step) { + if (port->wwpn != adapter->peer_wwpn) { + dev_err(&adapter->ccw_device->dev, + "Failed to open port 0x%016Lx, " + "Peer WWPN 0x%016Lx does not " + "match.\n", port->wwpn, + adapter->peer_wwpn); + zfcp_erp_port_failed(port, 25, NULL); + return ZFCP_ERP_FAILED; + } + port->d_id = adapter->peer_d_id; + atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); + return zfcp_erp_port_strategy_open_port(act); +} + +static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) +{ + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_port *ns_port = adapter->nameserver_port; + int p_status = atomic_read(&port->status); + switch (act->step) { case ZFCP_ERP_STEP_UNINITIALIZED: case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: case ZFCP_ERP_STEP_PORT_CLOSING: - if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) { - if (port->wwpn != adapter->peer_wwpn) { - ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx " - "on adapter %s.\nPeer WWPN " - "0x%016Lx does not match\n", - port->wwpn, - zfcp_get_busid_by_adapter(adapter), - adapter->peer_wwpn); - zfcp_erp_port_failed(port, 25, NULL); - retval = ZFCP_ERP_FAILED; - break; - } - port->d_id = adapter->peer_d_id; - atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); - retval = zfcp_erp_port_strategy_open_port(erp_action); - break; + if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) + return zfcp_erp_open_ptp_port(act); + if (!ns_port) { + dev_err(&adapter->ccw_device->dev, + "Nameserver port unavailable.\n"); + return ZFCP_ERP_FAILED; } - if (!(adapter->nameserver_port)) { - retval = zfcp_nameserver_enqueue(adapter); - if (retval != 0) { - ZFCP_LOG_NORMAL("error: nameserver port " - "unavailable for adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = ZFCP_ERP_FAILED; - break; - } - } - if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &adapter->nameserver_port->status)) { - ZFCP_LOG_DEBUG("nameserver port is not open -> open " - "nameserver port\n"); + if (!(atomic_read(&ns_port->status) & + ZFCP_STATUS_COMMON_UNBLOCKED)) { /* nameserver port may live again */ atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, - &adapter->nameserver_port->status); - if (zfcp_erp_port_reopen(adapter->nameserver_port, 0, - 77, erp_action) >= 0) { - erp_action->step = - ZFCP_ERP_STEP_NAMESERVER_OPEN; - retval = ZFCP_ERP_CONTINUES; - } else - retval = ZFCP_ERP_FAILED; - break; + &ns_port->status); + if (zfcp_erp_port_reopen(ns_port, 0, 77, act) >= 0) { + act->step = ZFCP_ERP_STEP_NAMESERVER_OPEN; + return ZFCP_ERP_CONTINUES; + } + return ZFCP_ERP_FAILED; } /* else nameserver port is already open, fall through */ case ZFCP_ERP_STEP_NAMESERVER_OPEN: - if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, - &adapter->nameserver_port->status)) { - ZFCP_LOG_DEBUG("open failed for nameserver port\n"); - retval = ZFCP_ERP_FAILED; - } else { - ZFCP_LOG_DEBUG("nameserver port is open -> " - "nameserver look-up for port 0x%016Lx\n", - port->wwpn); - retval = zfcp_erp_port_strategy_open_common_lookup - (erp_action); - } - break; + if (!(atomic_read(&ns_port->status) & ZFCP_STATUS_COMMON_OPEN)) + return ZFCP_ERP_FAILED; + return zfcp_erp_port_strategy_open_lookup(act); case ZFCP_ERP_STEP_NAMESERVER_LOOKUP: - if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) { - if (atomic_test_mask - (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) { - ZFCP_LOG_DEBUG("nameserver look-up failed " - "for port 0x%016Lx " - "(misconfigured WWPN?)\n", - port->wwpn); + if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) { + if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) { zfcp_erp_port_failed(port, 26, NULL); - retval = ZFCP_ERP_EXIT; - } else { - ZFCP_LOG_DEBUG("nameserver look-up failed for " - "port 0x%016Lx\n", port->wwpn); - retval = ZFCP_ERP_FAILED; + return ZFCP_ERP_EXIT; } - } else { - ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%06x -> " - "trying open\n", port->wwpn, port->d_id); - retval = zfcp_erp_port_strategy_open_port(erp_action); + return ZFCP_ERP_FAILED; } - break; + return zfcp_erp_port_strategy_open_port(act); case ZFCP_ERP_STEP_PORT_OPENING: /* D_ID might have changed during open */ - if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN | - ZFCP_STATUS_PORT_DID_DID), - &port->status)) { - ZFCP_LOG_DEBUG("port 0x%016Lx is open\n", port->wwpn); - retval = ZFCP_ERP_SUCCEEDED; - } else { - ZFCP_LOG_DEBUG("open failed for port 0x%016Lx\n", - port->wwpn); - retval = ZFCP_ERP_FAILED; - } - break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", - erp_action->step); - retval = ZFCP_ERP_FAILED; + if ((p_status & ZFCP_STATUS_COMMON_OPEN) && + (p_status & ZFCP_STATUS_PORT_DID_DID)) + return ZFCP_ERP_SUCCEEDED; + /* fall through otherwise */ } + return ZFCP_ERP_FAILED; +} - return retval; +static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *act) +{ + if (atomic_read(&act->port->status) & (ZFCP_STATUS_PORT_WKA)) + return zfcp_erp_port_strategy_open_nameserver(act); + return zfcp_erp_port_strategy_open_common(act); } -static int -zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action) +static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) { - int retval; struct zfcp_port *port = erp_action->port; switch (erp_action->step) { - case ZFCP_ERP_STEP_UNINITIALIZED: - case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: - case ZFCP_ERP_STEP_PORT_CLOSING: - ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%06x -> trying open\n", - port->wwpn, port->d_id); - retval = zfcp_erp_port_strategy_open_port(erp_action); + zfcp_erp_port_strategy_clearstati(port); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN) + return zfcp_erp_port_strategy_close(erp_action); break; - case ZFCP_ERP_STEP_PORT_OPENING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { - ZFCP_LOG_DEBUG("WKA port is open\n"); - retval = ZFCP_ERP_SUCCEEDED; - } else { - ZFCP_LOG_DEBUG("open failed for WKA port\n"); - retval = ZFCP_ERP_FAILED; - } - /* this is needed anyway (dont care for retval of wakeup) */ - ZFCP_LOG_DEBUG("continue other open port operations\n"); - zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action); + case ZFCP_ERP_STEP_PORT_CLOSING: + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN) + return ZFCP_ERP_FAILED; break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", - erp_action->step); - retval = ZFCP_ERP_FAILED; } + if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) + return ZFCP_ERP_EXIT; + else + return zfcp_erp_port_strategy_open(erp_action); - return retval; -} - -/* - * function: - * - * purpose: makes the erp thread continue with reopen (physical) port - * actions which have been paused until the name server port - * is opened (or failed) - * - * returns: 0 (a kind of void retval, its not used) - */ -static int -zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action - *ns_erp_action) -{ - int retval = 0; - unsigned long flags; - struct zfcp_adapter *adapter = ns_erp_action->adapter; - struct zfcp_erp_action *erp_action, *tmp; - - read_lock_irqsave(&adapter->erp_lock, flags); - list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head, - list) { - if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { - if (atomic_test_mask( - ZFCP_STATUS_COMMON_ERP_FAILED, - &adapter->nameserver_port->status)) - zfcp_erp_port_failed(erp_action->port, 27, - NULL); - zfcp_erp_action_ready(erp_action); - } - } - read_unlock_irqrestore(&adapter->erp_lock, flags); - - return retval; -} - -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action) -{ - int retval; - - retval = zfcp_fsf_close_physical_port(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; - if (retval != 0) { - /* could not send 'open', fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + return ZFCP_ERP_FAILED; } -static int -zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) +static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) { - int retval = 0; - atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | ZFCP_STATUS_COMMON_CLOSING | ZFCP_STATUS_COMMON_ACCESS_DENIED | - ZFCP_STATUS_PORT_DID_DID | - ZFCP_STATUS_PORT_PHYS_CLOSING | - ZFCP_STATUS_PORT_INVALID_WWPN, - &port->status); - return retval; -} - -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) -{ - int retval; - - retval = zfcp_fsf_close_port(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; - if (retval != 0) { - /* could not send 'close', fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + ZFCP_STATUS_UNIT_SHARED | + ZFCP_STATUS_UNIT_READONLY, + &unit->status); } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) +static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) { - int retval; - - retval = zfcp_fsf_open_port(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; - if (retval != 0) { - /* could not send 'open', fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + int retval = zfcp_fsf_close_unit(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action) +static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) { - int retval; - - retval = zfcp_ns_gid_pn_request(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; - if (retval != 0) { - /* could not send nameserver request, fail */ - retval = ZFCP_ERP_FAILED; - goto out; - } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + int retval = zfcp_fsf_open_unit(erp_action); + if (retval == -ENOMEM) + return ZFCP_ERP_NOMEM; + erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; + if (retval) + return ZFCP_ERP_FAILED; + return ZFCP_ERP_CONTINUES; } -/* - * function: - * - * purpose: this routine executes the 'Reopen Unit' action - * currently no retries - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_SUCCEEDED - action finished successfully - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) +static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_FAILED; struct zfcp_unit *unit = erp_action->unit; switch (erp_action->step) { - - /* - * FIXME: - * the ULP spec. begs for waiting for oustanding commands - */ case ZFCP_ERP_STEP_UNINITIALIZED: zfcp_erp_unit_strategy_clearstati(unit); - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { - ZFCP_LOG_DEBUG("unit 0x%016Lx is open -> " - "trying close\n", unit->fcp_lun); - retval = zfcp_erp_unit_strategy_close(erp_action); - break; - } - /* else it's already closed, fall through */ + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) + return zfcp_erp_unit_strategy_close(erp_action); + /* already closed, fall through */ case ZFCP_ERP_STEP_UNIT_CLOSING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { - ZFCP_LOG_DEBUG("close failed for unit 0x%016Lx\n", - unit->fcp_lun); - retval = ZFCP_ERP_FAILED; - } else { - if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) - retval = ZFCP_ERP_EXIT; - else { - ZFCP_LOG_DEBUG("unit 0x%016Lx is not open -> " - "trying open\n", unit->fcp_lun); - retval = - zfcp_erp_unit_strategy_open(erp_action); - } - } - break; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) + return ZFCP_ERP_FAILED; + if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) + return ZFCP_ERP_EXIT; + return zfcp_erp_unit_strategy_open(erp_action); case ZFCP_ERP_STEP_UNIT_OPENING: - if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { - ZFCP_LOG_DEBUG("unit 0x%016Lx is open\n", - unit->fcp_lun); - retval = ZFCP_ERP_SUCCEEDED; - } else { - ZFCP_LOG_DEBUG("open failed for unit 0x%016Lx\n", - unit->fcp_lun); - retval = ZFCP_ERP_FAILED; - } - break; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) + return ZFCP_ERP_SUCCEEDED; } - - return retval; + return ZFCP_ERP_FAILED; } -static int -zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) +static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) { - int retval = 0; - - atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | - ZFCP_STATUS_COMMON_CLOSING | - ZFCP_STATUS_COMMON_ACCESS_DENIED | - ZFCP_STATUS_UNIT_SHARED | - ZFCP_STATUS_UNIT_READONLY, - &unit->status); + switch (result) { + case ZFCP_ERP_SUCCEEDED : + atomic_set(&unit->erp_counter, 0); + zfcp_erp_unit_unblock(unit); + break; + case ZFCP_ERP_FAILED : + atomic_inc(&unit->erp_counter); + if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) + zfcp_erp_unit_failed(unit, 21, NULL); + break; + } - return retval; + if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_unit_block(unit, 0); + result = ZFCP_ERP_EXIT; + } + return result; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) +static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) { - int retval; + switch (result) { + case ZFCP_ERP_SUCCEEDED : + atomic_set(&port->erp_counter, 0); + zfcp_erp_port_unblock(port); + break; - retval = zfcp_fsf_close_unit(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; - if (retval != 0) { - /* could not send 'close', fail */ - retval = ZFCP_ERP_FAILED; - goto out; + case ZFCP_ERP_FAILED : + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { + zfcp_erp_port_block(port, 0); + result = ZFCP_ERP_EXIT; + } + atomic_inc(&port->erp_counter); + if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) + zfcp_erp_port_failed(port, 22, NULL); + break; } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_port_block(port, 0); + result = ZFCP_ERP_EXIT; + } + return result; } -/* - * function: - * - * purpose: - * - * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) - * ZFCP_ERP_FAILED - action finished unsuccessfully - */ -static int -zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) +static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, + int result) { - int retval; + switch (result) { + case ZFCP_ERP_SUCCEEDED : + atomic_set(&adapter->erp_counter, 0); + zfcp_erp_adapter_unblock(adapter); + break; - retval = zfcp_fsf_open_unit(erp_action); - if (retval == -ENOMEM) { - retval = ZFCP_ERP_NOMEM; - goto out; - } - erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; - if (retval != 0) { - /* could not send 'open', fail */ - retval = ZFCP_ERP_FAILED; - goto out; + case ZFCP_ERP_FAILED : + atomic_inc(&adapter->erp_counter); + if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) + zfcp_erp_adapter_failed(adapter, 23, NULL); + break; } - retval = ZFCP_ERP_CONTINUES; - out: - return retval; -} -void zfcp_erp_start_timer(struct zfcp_fsf_req *fsf_req) -{ - BUG_ON(!fsf_req->erp_action); - fsf_req->timer.function = zfcp_erp_timeout_handler; - fsf_req->timer.data = (unsigned long) fsf_req->erp_action; - fsf_req->timer.expires = jiffies + ZFCP_ERP_FSFREQ_TIMEOUT; - add_timer(&fsf_req->timer); + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { + zfcp_erp_adapter_block(adapter, 0); + result = ZFCP_ERP_EXIT; + } + return result; } -/* - * function: - * - * purpose: enqueue the specified error recovery action, if needed - * - * returns: - */ -static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, - struct zfcp_port *port, - struct zfcp_unit *unit, u8 id, void *ref) +static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, + int result) { - int retval = 1, need = want; - struct zfcp_erp_action *erp_action = NULL; - u32 status = 0; + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_port *port = erp_action->port; + struct zfcp_unit *unit = erp_action->unit; - /* - * We need some rules here which check whether we really need - * this action or whether we should just drop it. - * E.g. if there is a unfinished 'Reopen Port' request then we drop a - * 'Reopen Unit' request for an associated unit since we can't - * satisfy this request now. A 'Reopen Port' action will trigger - * 'Reopen Unit' actions when it completes. - * Thus, there are only actions in the queue which can immediately be - * executed. This makes the processing of the action queue more - * efficient. - */ - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, - &adapter->status)) - return -EIO; + switch (erp_action->action) { - /* check whether we really need this */ - switch (want) { case ZFCP_ERP_ACTION_REOPEN_UNIT: - if (atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) { - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &port->status) || - atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) - need = ZFCP_ERP_ACTION_REOPEN_PORT; - /* fall through !!! */ - - case ZFCP_ERP_ACTION_REOPEN_PORT: - if (atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) { - goto out; - } - /* fall through !!! */ + result = zfcp_erp_strategy_check_unit(unit, result); + break; case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, - &port->status)) { - if (port->erp_action.action != - ZFCP_ERP_ACTION_REOPEN_PORT_FORCED) { - ZFCP_LOG_INFO("dropped erp action %i (port " - "0x%016Lx, action in use: %i)\n", - want, port->wwpn, - port->erp_action.action); - } - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) || - atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { - goto out; - } - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) - need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; - /* fall through !!! */ + case ZFCP_ERP_ACTION_REOPEN_PORT: + result = zfcp_erp_strategy_check_port(port, result); + break; case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - if (atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) { - goto out; - } + result = zfcp_erp_strategy_check_adapter(adapter, result); break; - - default: - ZFCP_LOG_NORMAL("bug: unknown erp action requested " - "on adapter %s (action=%d)\n", - zfcp_get_busid_by_adapter(adapter), want); - goto out; } + return result; +} - /* check whether we need something stronger first */ - if (need) { - ZFCP_LOG_DEBUG("stronger erp action %d needed before " - "erp action %d on adapter %s\n", - need, want, zfcp_get_busid_by_adapter(adapter)); - } +static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) +{ + int status = atomic_read(target_status); - /* mark adapter to have some error recovery pending */ - atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); + if ((status & ZFCP_STATUS_COMMON_RUNNING) && + (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) + return 1; /* take it online */ - /* setup error recovery action */ - switch (need) { + if (!(status & ZFCP_STATUS_COMMON_RUNNING) && + !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) + return 1; /* take it offline */ - case ZFCP_ERP_ACTION_REOPEN_UNIT: - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); - erp_action = &unit->erp_action; - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &unit->status)) - status = ZFCP_STATUS_ERP_CLOSE_ONLY; + return 0; +} + +static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) +{ + int action = act->action; + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_unit *unit = act->unit; + u32 erp_status = act->status; + + switch (action) { + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { + _zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_COMMON_ERP_FAILED, + 67, NULL); + return ZFCP_ERP_EXIT; + } break; - case ZFCP_ERP_ACTION_REOPEN_PORT: case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - zfcp_port_get(port); - zfcp_erp_action_dismiss_port(port); - atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); - erp_action = &port->erp_action; - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &port->status)) - status = ZFCP_STATUS_ERP_CLOSE_ONLY; + case ZFCP_ERP_ACTION_REOPEN_PORT: + if (zfcp_erp_strat_change_det(&port->status, erp_status)) { + _zfcp_erp_port_reopen(port, + ZFCP_STATUS_COMMON_ERP_FAILED, + 68, NULL); + return ZFCP_ERP_EXIT; + } break; - case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - zfcp_adapter_get(adapter); - zfcp_erp_action_dismiss_adapter(adapter); - atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); - erp_action = &adapter->erp_action; - if (!atomic_test_mask - (ZFCP_STATUS_COMMON_RUNNING, &adapter->status)) - status = ZFCP_STATUS_ERP_CLOSE_ONLY; + case ZFCP_ERP_ACTION_REOPEN_UNIT: + if (zfcp_erp_strat_change_det(&unit->status, erp_status)) { + _zfcp_erp_unit_reopen(unit, + ZFCP_STATUS_COMMON_ERP_FAILED, + 69, NULL); + return ZFCP_ERP_EXIT; + } break; } - - memset(erp_action, 0, sizeof (struct zfcp_erp_action)); - erp_action->adapter = adapter; - erp_action->port = port; - erp_action->unit = unit; - erp_action->action = need; - erp_action->status = status; - - ++adapter->erp_total_count; - - /* finally put it into 'ready' queue and kick erp thread */ - list_add_tail(&erp_action->list, &adapter->erp_ready_head); - up(&adapter->erp_ready_sem); - zfcp_rec_dbf_event_thread(1, adapter, 0); - retval = 0; - out: - zfcp_rec_dbf_event_trigger(id, ref, want, need, erp_action, - adapter, port, unit); - return retval; + return ret; } -static int -zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) +static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) { - int retval = 0; struct zfcp_adapter *adapter = erp_action->adapter; - --adapter->erp_total_count; + adapter->erp_total_count--; if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { - --adapter->erp_low_mem_count; + adapter->erp_low_mem_count--; erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; } @@ -2919,141 +1224,458 @@ zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &erp_action->unit->status); break; + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: case ZFCP_ERP_ACTION_REOPEN_PORT: atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &erp_action->port->status); break; + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &erp_action->adapter->status); break; - default: - /* bug */ - break; } - return retval; } -/** - * zfcp_erp_action_cleanup - * - * Register unit with scsi stack if appropriate and fix reference counts. - * Note: Temporary units are not registered with scsi stack. - */ -static void -zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter, - struct zfcp_port *port, struct zfcp_unit *unit, - int result) +struct zfcp_erp_add_work { + struct zfcp_unit *unit; + struct work_struct work; +}; + +static void zfcp_erp_scsi_scan(struct work_struct *work) { - switch (action) { + struct zfcp_erp_add_work *p = + container_of(work, struct zfcp_erp_add_work, work); + struct zfcp_unit *unit = p->unit; + struct fc_rport *rport = unit->port->rport; + scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, + unit->scsi_lun, 0); + atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); + zfcp_unit_put(unit); + kfree(p); +} + +static void zfcp_erp_schedule_work(struct zfcp_unit *unit) +{ + struct zfcp_erp_add_work *p; + + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) { + dev_err(&unit->port->adapter->ccw_device->dev, + "Out of resources. Could not register unit " + "0x%016Lx on port 0x%016Lx with SCSI stack.\n", + unit->fcp_lun, unit->port->wwpn); + return; + } + + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); + INIT_WORK(&p->work, zfcp_erp_scsi_scan); + p->unit = unit; + schedule_work(&p->work); +} + +static void zfcp_erp_rport_register(struct zfcp_port *port) +{ + struct fc_rport_identifiers ids; + ids.node_name = port->wwnn; + ids.port_name = port->wwpn; + ids.port_id = port->d_id; + ids.roles = FC_RPORT_ROLE_FCP_TARGET; + port->rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); + if (!port->rport) { + dev_err(&port->adapter->ccw_device->dev, + "Failed registration of rport " + "0x%016Lx.\n", port->wwpn); + return; + } + + scsi_target_unblock(&port->rport->dev); + port->rport->maxframe_size = port->maxframe_size; + port->rport->supported_classes = port->supported_classes; +} + +static void zfcp_erp_rports_del(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; + list_for_each_entry(port, &adapter->port_list_head, list) + if (port->rport && !(atomic_read(&port->status) & + ZFCP_STATUS_PORT_WKA)) { + fc_remote_port_delete(port->rport); + port->rport = NULL; + } +} + +static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) +{ + struct zfcp_adapter *adapter = act->adapter; + struct zfcp_port *port = act->port; + struct zfcp_unit *unit = act->unit; + + switch (act->action) { case ZFCP_ERP_ACTION_REOPEN_UNIT: - if ((result == ZFCP_ERP_SUCCEEDED) - && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY, - &unit->status)) - && !unit->device - && port->rport) { + if ((result == ZFCP_ERP_SUCCEEDED) && + !unit->device && port->rport) { atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); - if (atomic_test_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, - &unit->status) == 0) + if (!(atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_SCSI_WORK_PENDING)) zfcp_erp_schedule_work(unit); } zfcp_unit_put(unit); break; + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: case ZFCP_ERP_ACTION_REOPEN_PORT: - if (atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, - &port->status)) { + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) { zfcp_port_put(port); - break; - } - - if ((result == ZFCP_ERP_SUCCEEDED) - && !port->rport) { - struct fc_rport_identifiers ids; - ids.node_name = port->wwnn; - ids.port_name = port->wwpn; - ids.port_id = port->d_id; - ids.roles = FC_RPORT_ROLE_FCP_TARGET; - port->rport = - fc_remote_port_add(adapter->scsi_host, 0, &ids); - if (!port->rport) - ZFCP_LOG_NORMAL("failed registration of rport" - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_port(port), - port->wwpn); - else { - scsi_target_unblock(&port->rport->dev); - port->rport->maxframe_size = port->maxframe_size; - port->rport->supported_classes = - port->supported_classes; - } + return; } + if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport) + zfcp_erp_rport_register(port); if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) { fc_remote_port_delete(port->rport); port->rport = NULL; } zfcp_port_put(port); break; + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: - if (result != ZFCP_ERP_SUCCEEDED) { - list_for_each_entry(port, &adapter->port_list_head, list) - if (port->rport && - !atomic_test_mask(ZFCP_STATUS_PORT_WKA, - &port->status)) { - fc_remote_port_delete(port->rport); - port->rport = NULL; - } - } + if (result != ZFCP_ERP_SUCCEEDED) + zfcp_erp_rports_del(adapter); zfcp_adapter_put(adapter); break; - default: - break; } } +static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) +{ + switch (erp_action->action) { + case ZFCP_ERP_ACTION_REOPEN_ADAPTER: + return zfcp_erp_adapter_strategy(erp_action); + case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: + return zfcp_erp_port_forced_strategy(erp_action); + case ZFCP_ERP_ACTION_REOPEN_PORT: + return zfcp_erp_port_strategy(erp_action); + case ZFCP_ERP_ACTION_REOPEN_UNIT: + return zfcp_erp_unit_strategy(erp_action); + } + return ZFCP_ERP_FAILED; +} -static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) +static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) { - struct zfcp_port *port; + int retval; + struct zfcp_adapter *adapter = erp_action->adapter; + unsigned long flags; - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) - zfcp_erp_action_dismiss(&adapter->erp_action); - else - list_for_each_entry(port, &adapter->port_list_head, list) - zfcp_erp_action_dismiss_port(port); + read_lock_irqsave(&zfcp_data.config_lock, flags); + write_lock(&adapter->erp_lock); + + zfcp_erp_strategy_check_fsfreq(erp_action); + + if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { + zfcp_erp_action_dequeue(erp_action); + retval = ZFCP_ERP_DISMISSED; + goto unlock; + } + + zfcp_erp_action_to_running(erp_action); + + /* no lock to allow for blocking operations */ + write_unlock(&adapter->erp_lock); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + retval = zfcp_erp_strategy_do_action(erp_action); + read_lock_irqsave(&zfcp_data.config_lock, flags); + write_lock(&adapter->erp_lock); + + if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) + retval = ZFCP_ERP_CONTINUES; + + switch (retval) { + case ZFCP_ERP_NOMEM: + if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { + ++adapter->erp_low_mem_count; + erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; + } + if (adapter->erp_total_count == adapter->erp_low_mem_count) + _zfcp_erp_adapter_reopen(adapter, 0, 66, NULL); + else { + zfcp_erp_strategy_memwait(erp_action); + retval = ZFCP_ERP_CONTINUES; + } + goto unlock; + + case ZFCP_ERP_CONTINUES: + if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { + --adapter->erp_low_mem_count; + erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; + } + goto unlock; + } + + retval = zfcp_erp_strategy_check_target(erp_action, retval); + zfcp_erp_action_dequeue(erp_action); + retval = zfcp_erp_strategy_statechange(erp_action, retval); + if (retval == ZFCP_ERP_EXIT) + goto unlock; + zfcp_erp_strategy_followup_actions(erp_action); + + unlock: + write_unlock(&adapter->erp_lock); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + + if (retval != ZFCP_ERP_CONTINUES) + zfcp_erp_action_cleanup(erp_action, retval); + + return retval; } -static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) +static int zfcp_erp_thread(void *data) { - struct zfcp_unit *unit; + struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; + struct list_head *next; + struct zfcp_erp_action *act; + unsigned long flags; - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) - zfcp_erp_action_dismiss(&port->erp_action); + daemonize("zfcperp%s", adapter->ccw_device->dev.bus_id); + /* Block all signals */ + siginitsetinv(¤t->blocked, 0); + atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); + wake_up(&adapter->erp_thread_wqh); + + while (!(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) { + write_lock_irqsave(&adapter->erp_lock, flags); + next = adapter->erp_ready_head.next; + write_unlock_irqrestore(&adapter->erp_lock, flags); + + if (next != &adapter->erp_ready_head) { + act = list_entry(next, struct zfcp_erp_action, list); + + /* there is more to come after dismission, no notify */ + if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) + zfcp_erp_wakeup(adapter); + } + + zfcp_rec_dbf_event_thread(4, adapter); + down_interruptible(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread(5, adapter); + } + + atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); + wake_up(&adapter->erp_thread_wqh); + + return 0; +} + +/** + * zfcp_erp_thread_setup - Start ERP thread for adapter + * @adapter: Adapter to start the ERP thread for + * + * Returns 0 on success or error code from kernel_thread() + */ +int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) +{ + int retval; + + atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); + retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); + if (retval < 0) { + dev_err(&adapter->ccw_device->dev, + "Creation of ERP thread failed.\n"); + return retval; + } + wait_event(adapter->erp_thread_wqh, + atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_UP); + return 0; +} + +/** + * zfcp_erp_thread_kill - Stop ERP thread. + * @adapter: Adapter where the ERP thread should be stopped. + * + * The caller of this routine ensures that the specified adapter has + * been shut down and that this operation has been completed. Thus, + * there are no pending erp_actions which would need to be handled + * here. + */ +void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) +{ + atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); + up(&adapter->erp_ready_sem); + zfcp_rec_dbf_event_thread_lock(2, adapter); + + wait_event(adapter->erp_thread_wqh, + !(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_THREAD_UP)); + + atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, + &adapter->status); +} + +/** + * zfcp_erp_adapter_failed - Set adapter status to failed. + * @adapter: Failed adapter. + * @id: Event id for debug trace. + * @ref: Reference for debug trace. + */ +void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref) +{ + zfcp_erp_modify_adapter_status(adapter, id, ref, + ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); + dev_err(&adapter->ccw_device->dev, "Adapter ERP failed.\n"); +} + +/** + * zfcp_erp_port_failed - Set port status to failed. + * @port: Failed port. + * @id: Event id for debug trace. + * @ref: Reference for debug trace. + */ +void zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref) +{ + zfcp_erp_modify_port_status(port, id, ref, + ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); + + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA) + dev_err(&port->adapter->ccw_device->dev, + "Port ERP failed for WKA port d_id=0x%06x.\n", + port->d_id); else - list_for_each_entry(unit, &port->unit_list_head, list) - zfcp_erp_action_dismiss_unit(unit); + dev_err(&port->adapter->ccw_device->dev, + "Port ERP failed for port wwpn=0x%016Lx.\n", + port->wwpn); } -static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) +/** + * zfcp_erp_unit_failed - Set unit status to failed. + * @unit: Failed unit. + * @id: Event id for debug trace. + * @ref: Reference for debug trace. + */ +void zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref) { - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) - zfcp_erp_action_dismiss(&unit->erp_action); + zfcp_erp_modify_unit_status(unit, id, ref, + ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); + + dev_err(&unit->port->adapter->ccw_device->dev, + "Unit ERP failed for unit 0x%016Lx on port 0x%016Lx.\n", + unit->fcp_lun, unit->port->wwpn); } -static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) +/** + * zfcp_erp_wait - wait for completion of error recovery on an adapter + * @adapter: adapter for which to wait for completion of its error recovery + */ +void zfcp_erp_wait(struct zfcp_adapter *adapter) { - list_move(&erp_action->list, &erp_action->adapter->erp_running_head); - zfcp_rec_dbf_event_action(145, erp_action); + wait_event(adapter->erp_done_wqh, + !(atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_ERP_PENDING)); +} + +/** + * zfcp_erp_modify_adapter_status - change adapter status bits + * @adapter: adapter to change the status + * @id: id for the debug trace + * @ref: reference for the debug trace + * @mask: status bits to change + * @set_or_clear: ZFCP_SET or ZFCP_CLEAR + * + * Changes in common status bits are propagated to attached ports and units. + */ +void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id, + void *ref, u32 mask, int set_or_clear) +{ + struct zfcp_port *port; + u32 common_mask = mask & ZFCP_COMMON_FLAGS; + + if (set_or_clear == ZFCP_SET) { + if (status_change_set(mask, &adapter->status)) + zfcp_rec_dbf_event_adapter(id, ref, adapter); + atomic_set_mask(mask, &adapter->status); + } else { + if (status_change_clear(mask, &adapter->status)) + zfcp_rec_dbf_event_adapter(id, ref, adapter); + atomic_clear_mask(mask, &adapter->status); + if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) + atomic_set(&adapter->erp_counter, 0); + } + + if (common_mask) + list_for_each_entry(port, &adapter->port_list_head, list) + zfcp_erp_modify_port_status(port, id, ref, common_mask, + set_or_clear); } -static void zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action) +/** + * zfcp_erp_modify_port_status - change port status bits + * @port: port to change the status bits + * @id: id for the debug trace + * @ref: reference for the debug trace + * @mask: status bits to change + * @set_or_clear: ZFCP_SET or ZFCP_CLEAR + * + * Changes in common status bits are propagated to attached units. + */ +void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref, + u32 mask, int set_or_clear) { - list_move(&erp_action->list, &erp_action->adapter->erp_ready_head); - zfcp_rec_dbf_event_action(146, erp_action); + struct zfcp_unit *unit; + u32 common_mask = mask & ZFCP_COMMON_FLAGS; + + if (set_or_clear == ZFCP_SET) { + if (status_change_set(mask, &port->status)) + zfcp_rec_dbf_event_port(id, ref, port); + atomic_set_mask(mask, &port->status); + } else { + if (status_change_clear(mask, &port->status)) + zfcp_rec_dbf_event_port(id, ref, port); + atomic_clear_mask(mask, &port->status); + if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) + atomic_set(&port->erp_counter, 0); + } + + if (common_mask) + list_for_each_entry(unit, &port->unit_list_head, list) + zfcp_erp_modify_unit_status(unit, id, ref, common_mask, + set_or_clear); } +/** + * zfcp_erp_modify_unit_status - change unit status bits + * @unit: unit to change the status bits + * @id: id for the debug trace + * @ref: reference for the debug trace + * @mask: status bits to change + * @set_or_clear: ZFCP_SET or ZFCP_CLEAR + */ +void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref, + u32 mask, int set_or_clear) +{ + if (set_or_clear == ZFCP_SET) { + if (status_change_set(mask, &unit->status)) + zfcp_rec_dbf_event_unit(id, ref, unit); + atomic_set_mask(mask, &unit->status); + } else { + if (status_change_clear(mask, &unit->status)) + zfcp_rec_dbf_event_unit(id, ref, unit); + atomic_clear_mask(mask, &unit->status); + if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { + atomic_set(&unit->erp_counter, 0); + } + } +} + +/** + * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP + * @port: The "boxed" port. + * @id: The debug trace id. + * @id: Reference for the debug trace. + */ void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref) { unsigned long flags; @@ -3065,6 +1687,12 @@ void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref) zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } +/** + * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP + * @port: The "boxed" unit. + * @id: The debug trace id. + * @id: Reference for the debug trace. + */ void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref) { zfcp_erp_modify_unit_status(unit, id, ref, @@ -3072,6 +1700,15 @@ void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref) zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } +/** + * zfcp_erp_port_access_denied - Adapter denied access to port. + * @port: port where access has been denied + * @id: id for debug trace + * @ref: reference for debug trace + * + * Since the adapter has denied access, stop using the port and the + * attached units. + */ void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref) { unsigned long flags; @@ -3083,6 +1720,14 @@ void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref) read_unlock_irqrestore(&zfcp_data.config_lock, flags); } +/** + * zfcp_erp_unit_access_denied - Adapter denied access to unit. + * @unit: unit where access has been denied + * @id: id for debug trace + * @ref: reference for debug trace + * + * Since the adapter has denied access, stop using the unit. + */ void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref) { zfcp_erp_modify_unit_status(unit, id, ref, @@ -3090,67 +1735,54 @@ void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref) ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); } -void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id, - void *ref) +static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, + void *ref) { - struct zfcp_port *port; - unsigned long flags; - - if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) + int status = atomic_read(&unit->status); + if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | + ZFCP_STATUS_COMMON_ACCESS_BOXED))) return; - read_lock_irqsave(&zfcp_data.config_lock, flags); - if (adapter->nameserver_port) - zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref); - list_for_each_entry(port, &adapter->port_list_head, list) - if (port != adapter->nameserver_port) - zfcp_erp_port_access_changed(port, id, ref); - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } -void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, void *ref) +static void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, + void *ref) { - struct zfcp_adapter *adapter = port->adapter; struct zfcp_unit *unit; + int status = atomic_read(&port->status); - if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, - &port->status) && - !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, - &port->status)) { - if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) + if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | + ZFCP_STATUS_COMMON_ACCESS_BOXED))) { + if (!(status & ZFCP_STATUS_PORT_WKA)) list_for_each_entry(unit, &port->unit_list_head, list) zfcp_erp_unit_access_changed(unit, id, ref); return; } - ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s " - "(due to ACT update)\n", - port->wwpn, zfcp_get_busid_by_adapter(adapter)); - if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref)) - ZFCP_LOG_NORMAL("failed reopen of port" - "(adapter %s, wwpn=0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), port->wwpn); + zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); } -void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, void *ref) +/** + * zfcp_erp_adapter_access_changed - Process change in adapter ACT + * @adapter: Adapter where the Access Control Table (ACT) changed + * @id: Id for debug trace + * @ref: Reference for debug trace + */ +void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id, + void *ref) { - struct zfcp_adapter *adapter = unit->port->adapter; + struct zfcp_port *port; + unsigned long flags; - if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, - &unit->status) && - !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, - &unit->status)) + if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) return; - ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx " - " on adapter %s (due to ACT update)\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref)) - ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, " - "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, unit->fcp_lun); + read_lock_irqsave(&zfcp_data.config_lock, flags); + if (adapter->nameserver_port) + zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref); + list_for_each_entry(port, &adapter->port_list_head, list) + if (port != adapter->nameserver_port) + zfcp_erp_port_access_changed(port, id, ref); + read_unlock_irqrestore(&zfcp_data.config_lock, flags); } - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 6abf178..8065b2b 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -1,22 +1,9 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * External function declarations. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #ifndef ZFCP_EXT_H @@ -24,172 +11,51 @@ #include "zfcp_def.h" -extern struct zfcp_data zfcp_data; - -/******************************** SYSFS *************************************/ -extern struct attribute_group *zfcp_driver_attr_groups[]; -extern int zfcp_sysfs_adapter_create_files(struct device *); -extern void zfcp_sysfs_adapter_remove_files(struct device *); -extern int zfcp_sysfs_port_create_files(struct device *, u32); -extern void zfcp_sysfs_port_remove_files(struct device *, u32); -extern int zfcp_sysfs_unit_create_files(struct device *); -extern void zfcp_sysfs_unit_remove_files(struct device *); -extern void zfcp_sysfs_port_release(struct device *); -extern void zfcp_sysfs_unit_release(struct device *); - -/**************************** CONFIGURATION *********************************/ -extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, fcp_lun_t); -extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, wwn_t); -extern struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *, u32); -struct zfcp_adapter *zfcp_get_adapter_by_busid(char *); -extern struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *); -extern int zfcp_adapter_debug_register(struct zfcp_adapter *); -extern void zfcp_adapter_dequeue(struct zfcp_adapter *); -extern void zfcp_adapter_debug_unregister(struct zfcp_adapter *); -extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t, - u32, u32); -extern void zfcp_port_dequeue(struct zfcp_port *); +/* zfcp_aux.c */ +extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, + fcp_lun_t); +extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, + wwn_t); +extern int zfcp_adapter_enqueue(struct ccw_device *); +extern void zfcp_adapter_dequeue(struct zfcp_adapter *); +extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t, u32, + u32); +extern void zfcp_port_dequeue(struct zfcp_port *); extern struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *, fcp_lun_t); -extern void zfcp_unit_dequeue(struct zfcp_unit *); - -/******************************* S/390 IO ************************************/ -extern int zfcp_ccw_register(void); - -extern void zfcp_qdio_zero_sbals(struct qdio_buffer **, int, int); -extern int zfcp_qdio_allocate(struct zfcp_adapter *); -extern int zfcp_qdio_allocate_queues(struct zfcp_adapter *); -extern void zfcp_qdio_free_queues(struct zfcp_adapter *); -extern int zfcp_qdio_determine_pci(struct zfcp_qdio_queue *, - struct zfcp_fsf_req *); - -extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req - (struct zfcp_fsf_req *, int, int); -extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr - (struct zfcp_fsf_req *); -extern int zfcp_qdio_sbals_from_sg - (struct zfcp_fsf_req *, unsigned long, struct scatterlist *, int, int); -extern int zfcp_qdio_sbals_from_scsicmnd - (struct zfcp_fsf_req *, unsigned long, struct scsi_cmnd *); - - -/******************************** FSF ****************************************/ -extern int zfcp_fsf_open_port(struct zfcp_erp_action *); -extern int zfcp_fsf_close_port(struct zfcp_erp_action *); -extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *); - -extern int zfcp_fsf_open_unit(struct zfcp_erp_action *); -extern int zfcp_fsf_close_unit(struct zfcp_erp_action *); - -extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *); -extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *, - struct fsf_qtcb_bottom_config *); -extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *); -extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *, - struct fsf_qtcb_bottom_port *); -extern int zfcp_fsf_control_file(struct zfcp_adapter *, struct zfcp_fsf_req **, - u32, u32, struct zfcp_sg_list *); -extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long); -extern void zfcp_erp_start_timer(struct zfcp_fsf_req *); -extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *); -extern int zfcp_fsf_status_read(struct zfcp_adapter *, int); -extern int zfcp_fsf_req_create(struct zfcp_adapter *, u32, int, mempool_t *, - unsigned long *, struct zfcp_fsf_req **); -extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *, - struct zfcp_erp_action *); -extern int zfcp_fsf_send_els(struct zfcp_send_els *); -extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *, - struct zfcp_unit *, - struct scsi_cmnd *, int, int); -extern int zfcp_fsf_req_complete(struct zfcp_fsf_req *); -extern void zfcp_fsf_incoming_els(struct zfcp_fsf_req *); -extern void zfcp_fsf_req_free(struct zfcp_fsf_req *); -extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_command_task_management( - struct zfcp_adapter *, struct zfcp_unit *, u8, int); -extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command( - unsigned long, struct zfcp_adapter *, struct zfcp_unit *, int); - -/******************************* FC/FCP **************************************/ -extern int zfcp_nameserver_enqueue(struct zfcp_adapter *); -extern int zfcp_ns_gid_pn_request(struct zfcp_erp_action *); -extern int zfcp_check_ct_response(struct ct_hdr *); -extern int zfcp_handle_els_rjt(u32, struct zfcp_ls_rjt_par *); -extern void zfcp_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *); - -/******************************* SCSI ****************************************/ -extern int zfcp_adapter_scsi_register(struct zfcp_adapter *); -extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *); -extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t); -extern char *zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *); -extern void set_host_byte(int *, char); -extern void set_driver_byte(int *, char); -extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *); -extern fcp_dl_t zfcp_get_fcp_dl(struct fcp_cmnd_iu *); - -extern int zfcp_scsi_command_async(struct zfcp_adapter *,struct zfcp_unit *, - struct scsi_cmnd *, int); -extern int zfcp_scsi_command_sync(struct zfcp_unit *, struct scsi_cmnd *, int); -extern struct fc_function_template zfcp_transport_functions; - -/******************************** ERP ****************************************/ -extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *, - u32, int); -extern int zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *); -extern int zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *); -extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *); - -extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32, - int); -extern int zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *); -extern int zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *); -extern int zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *); -extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *); -extern int zfcp_erp_port_reopen_all(struct zfcp_adapter *, int, u8, void *); - -extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32, - int); -extern int zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *); -extern int zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *); -extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *); - -extern int zfcp_erp_thread_setup(struct zfcp_adapter *); -extern int zfcp_erp_thread_kill(struct zfcp_adapter *); -extern int zfcp_erp_wait(struct zfcp_adapter *); -extern void zfcp_erp_async_handler(struct zfcp_erp_action *, unsigned long); - -extern int zfcp_test_link(struct zfcp_port *); - -extern void zfcp_erp_port_boxed(struct zfcp_port *, u8 id, void *ref); -extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8 id, void *ref); -extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8 id, void *ref); -extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8 id, void *ref); -extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *); -extern void zfcp_erp_port_access_changed(struct zfcp_port *, u8, void *); -extern void zfcp_erp_unit_access_changed(struct zfcp_unit *, u8, void *); - -/******************************** AUX ****************************************/ -extern void zfcp_rec_dbf_event_thread(u8 id, struct zfcp_adapter *adapter, - int lock); -extern void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *); -extern void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port); -extern void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit); -extern void zfcp_rec_dbf_event_trigger(u8 id, void *ref, u8 want, u8 need, - void *action, struct zfcp_adapter *, +extern void zfcp_unit_dequeue(struct zfcp_unit *); +extern int zfcp_reqlist_isempty(struct zfcp_adapter *); +extern void zfcp_sg_free_table(struct scatterlist *, int); +extern int zfcp_sg_setup_table(struct scatterlist *, int); + +/* zfcp_ccw.c */ +extern int zfcp_ccw_register(void); + +/* zfcp_cfdc.c */ +extern struct miscdevice zfcp_cfdc_misc; + +/* zfcp_dbf.c */ +extern int zfcp_adapter_debug_register(struct zfcp_adapter *); +extern void zfcp_adapter_debug_unregister(struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_thread(u8, struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_thread_lock(u8, struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_adapter(u8, void *, struct zfcp_adapter *); +extern void zfcp_rec_dbf_event_port(u8, void *, struct zfcp_port *); +extern void zfcp_rec_dbf_event_unit(u8, void *, struct zfcp_unit *); +extern void zfcp_rec_dbf_event_trigger(u8, void *, u8, u8, void *, + struct zfcp_adapter *, struct zfcp_port *, struct zfcp_unit *); -extern void zfcp_rec_dbf_event_action(u8 id, struct zfcp_erp_action *); - +extern void zfcp_rec_dbf_event_action(u8, struct zfcp_erp_action *); extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *); extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *, struct fsf_status_read_buffer *); extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *, unsigned int, unsigned int, unsigned int, int, int); - extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *); extern void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *); - extern void zfcp_scsi_dbf_event_result(const char *, int, struct zfcp_adapter *, struct scsi_cmnd *, struct zfcp_fsf_req *); @@ -198,6 +64,101 @@ extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *, unsigned long); extern void zfcp_scsi_dbf_event_devreset(const char *, u8, struct zfcp_unit *, struct scsi_cmnd *); -extern int zfcp_reqlist_isempty(struct zfcp_adapter *); + +/* zfcp_erp.c */ +extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *, + u32, int); +extern void zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *); +extern void zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *); +extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *); +extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32, + int); +extern int zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *); +extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *); +extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *); +extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *); +extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32, + int); +extern void zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *); +extern void zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *); +extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *); +extern int zfcp_erp_thread_setup(struct zfcp_adapter *); +extern void zfcp_erp_thread_kill(struct zfcp_adapter *); +extern void zfcp_erp_wait(struct zfcp_adapter *); +extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long); +extern void zfcp_erp_port_boxed(struct zfcp_port *, u8, void *); +extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8, void *); +extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8, void *); +extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8, void *); +extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *); +extern void zfcp_erp_timeout_handler(unsigned long); + +/* zfcp_fc.c */ +extern int zfcp_scan_ports(struct zfcp_adapter *); +extern void _zfcp_scan_ports_later(struct work_struct *); +extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *); +extern int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *); +extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *); +extern void zfcp_test_link(struct zfcp_port *); + +/* zfcp_fsf.c */ +extern int zfcp_fsf_open_port(struct zfcp_erp_action *); +extern int zfcp_fsf_close_port(struct zfcp_erp_action *); +extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *); +extern int zfcp_fsf_open_unit(struct zfcp_erp_action *); +extern int zfcp_fsf_close_unit(struct zfcp_erp_action *); +extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *); +extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *, + struct fsf_qtcb_bottom_config *); +extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *); +extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *, + struct fsf_qtcb_bottom_port *); +extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *, + struct zfcp_fsf_cfdc *); +extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *); +extern int zfcp_fsf_status_read(struct zfcp_adapter *); +extern int zfcp_status_read_refill(struct zfcp_adapter *adapter); +extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *, + struct zfcp_erp_action *); +extern int zfcp_fsf_send_els(struct zfcp_send_els *); +extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *, + struct zfcp_unit *, + struct scsi_cmnd *, int, int); +extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *); +extern void zfcp_fsf_req_free(struct zfcp_fsf_req *); +extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *, + struct zfcp_unit *, u8, int); +extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long, + struct zfcp_adapter *, + struct zfcp_unit *, int); + +/* zfcp_qdio.c */ +extern int zfcp_qdio_allocate(struct zfcp_adapter *); +extern void zfcp_qdio_free(struct zfcp_adapter *); +extern int zfcp_qdio_send(struct zfcp_fsf_req *); +extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req( + struct zfcp_fsf_req *); +extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr( + struct zfcp_fsf_req *); +extern int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *, unsigned long, + struct scatterlist *, int); +extern int zfcp_qdio_open(struct zfcp_adapter *); +extern void zfcp_qdio_close(struct zfcp_adapter *); + +/* zfcp_scsi.c */ +extern struct zfcp_data zfcp_data; +extern int zfcp_adapter_scsi_register(struct zfcp_adapter *); +extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *); +extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t); +extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *); +extern struct fc_function_template zfcp_transport_functions; + +/* zfcp_sysfs.c */ +extern struct attribute_group zfcp_sysfs_unit_attrs; +extern struct attribute_group zfcp_sysfs_adapter_attrs; +extern struct attribute_group zfcp_sysfs_ns_port_attrs; +extern struct attribute_group zfcp_sysfs_port_attrs; +extern struct device_attribute *zfcp_sysfs_sdev_attrs[]; +extern struct device_attribute *zfcp_sysfs_shost_attrs[]; #endif /* ZFCP_EXT_H */ diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c new file mode 100644 index 0000000..e984469 --- /dev/null +++ b/drivers/s390/scsi/zfcp_fc.c @@ -0,0 +1,567 @@ +/* + * zfcp device driver + * + * Fibre Channel related functions for the zfcp device driver. + * + * Copyright IBM Corporation 2008 + */ + +#include "zfcp_ext.h" + +struct ct_iu_gpn_ft_req { + struct ct_hdr header; + u8 flags; + u8 domain_id_scope; + u8 area_id_scope; + u8 fc4_type; +} __attribute__ ((packed)); + +struct gpn_ft_resp_acc { + u8 control; + u8 port_id[3]; + u8 reserved[4]; + u64 wwpn; +} __attribute__ ((packed)); + +#define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \ + / sizeof(struct gpn_ft_resp_acc)) +#define ZFCP_GPN_FT_BUFFERS 4 +#define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) + +struct ct_iu_gpn_ft_resp { + struct ct_hdr header; + struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; +} __attribute__ ((packed)); + +struct zfcp_gpn_ft { + struct zfcp_send_ct ct; + struct scatterlist sg_req; + struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; +}; + +static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter, + u32 d_id) +{ + struct zfcp_port *port; + + list_for_each_entry(port, &adapter->port_list_head, list) + if ((port->d_id == d_id) && + !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) + return port; + return NULL; +} + +static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, + struct fcp_rscn_element *elem) +{ + unsigned long flags; + struct zfcp_port *port; + + read_lock_irqsave(&zfcp_data.config_lock, flags); + list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { + if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) + continue; + /* FIXME: ZFCP_STATUS_PORT_DID_DID check is racy */ + if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) + /* Try to connect to unused ports anyway. */ + zfcp_erp_port_reopen(port, + ZFCP_STATUS_COMMON_ERP_FAILED, + 82, fsf_req); + else if ((port->d_id & range) == (elem->nport_did & range)) + /* Check connection status for connected ports */ + zfcp_test_link(port); + } + read_unlock_irqrestore(&zfcp_data.config_lock, flags); +} + +static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) +{ + struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; + struct fcp_rscn_head *fcp_rscn_head; + struct fcp_rscn_element *fcp_rscn_element; + u16 i; + u16 no_entries; + u32 range_mask; + + fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; + fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; + + /* see FC-FS */ + no_entries = fcp_rscn_head->payload_len / + sizeof(struct fcp_rscn_element); + + for (i = 1; i < no_entries; i++) { + /* skip head and start with 1st element */ + fcp_rscn_element++; + switch (fcp_rscn_element->addr_format) { + case ZFCP_PORT_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_PORT; + break; + case ZFCP_AREA_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_AREA; + break; + case ZFCP_DOMAIN_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_DOMAIN; + break; + case ZFCP_FABRIC_ADDRESS: + range_mask = ZFCP_PORTS_RANGE_FABRIC; + break; + default: + continue; + } + _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); + } + schedule_work(&fsf_req->adapter->scan_work); +} + +static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, wwn_t wwpn) +{ + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_port *port; + unsigned long flags; + + read_lock_irqsave(&zfcp_data.config_lock, flags); + list_for_each_entry(port, &adapter->port_list_head, list) + if (port->wwpn == wwpn) + break; + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + + if (port && (port->wwpn == wwpn)) + zfcp_erp_port_forced_reopen(port, 0, 83, req); +} + +static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) +{ + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *)req->data; + struct fsf_plogi *els_plogi = + (struct fsf_plogi *) status_buffer->payload.data; + + zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); +} + +static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) +{ + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *)req->data; + struct fcp_logo *els_logo = + (struct fcp_logo *) status_buffer->payload.data; + + zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); +} + +/** + * zfcp_fc_incoming_els - handle incoming ELS + * @fsf_req - request which contains incoming ELS + */ +void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) +{ + struct fsf_status_read_buffer *status_buffer = + (struct fsf_status_read_buffer *) fsf_req->data; + unsigned int els_type = status_buffer->payload.data[0]; + + zfcp_san_dbf_event_incoming_els(fsf_req); + if (els_type == LS_PLOGI) + zfcp_fc_incoming_plogi(fsf_req); + else if (els_type == LS_LOGO) + zfcp_fc_incoming_logo(fsf_req); + else if (els_type == LS_RSCN) + zfcp_fc_incoming_rscn(fsf_req); +} + +static void zfcp_ns_gid_pn_handler(unsigned long data) +{ + struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; + struct zfcp_send_ct *ct = &gid_pn->ct; + struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); + struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); + struct zfcp_port *port = gid_pn->port; + + if (ct->status) + goto out; + if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) { + atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); + goto out; + } + /* paranoia */ + if (ct_iu_req->wwpn != port->wwpn) + goto out; + /* looks like a valid d_id */ + port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; + atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); +out: + mempool_free(gid_pn, port->adapter->pool.data_gid_pn); +} + +/** + * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request + * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed + * return: -ENOMEM on error, 0 otherwise + */ +int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action) +{ + int ret; + struct zfcp_gid_pn_data *gid_pn; + struct zfcp_adapter *adapter = erp_action->adapter; + + gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); + if (!gid_pn) + return -ENOMEM; + + memset(gid_pn, 0, sizeof(*gid_pn)); + + /* setup parameters for send generic command */ + gid_pn->port = erp_action->port; + gid_pn->ct.port = adapter->nameserver_port; + gid_pn->ct.handler = zfcp_ns_gid_pn_handler; + gid_pn->ct.handler_data = (unsigned long) gid_pn; + gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; + gid_pn->ct.req = &gid_pn->req; + gid_pn->ct.resp = &gid_pn->resp; + gid_pn->ct.req_count = 1; + gid_pn->ct.resp_count = 1; + sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, + sizeof(struct ct_iu_gid_pn_req)); + sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, + sizeof(struct ct_iu_gid_pn_resp)); + + /* setup nameserver request */ + gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; + gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; + gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; + gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; + gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; + gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_MAX_SIZE; + gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; + + ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, + erp_action); + if (ret) + mempool_free(gid_pn, adapter->pool.data_gid_pn); + return ret; +} + +/** + * zfcp_fc_plogi_evaluate - evaluate PLOGI playload + * @port: zfcp_port structure + * @plogi: plogi payload + * + * Evaluate PLOGI playload and copy important fields into zfcp_port structure + */ +void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) +{ + port->maxframe_size = plogi->serv_param.common_serv_param[7] | + ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); + if (plogi->serv_param.class1_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS1; + if (plogi->serv_param.class2_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS2; + if (plogi->serv_param.class3_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS3; + if (plogi->serv_param.class4_serv_param[0] & 0x80) + port->supported_classes |= FC_COS_CLASS4; +} + +struct zfcp_els_adisc { + struct zfcp_send_els els; + struct scatterlist req; + struct scatterlist resp; + struct zfcp_ls_adisc ls_adisc; + struct zfcp_ls_adisc_acc ls_adisc_acc; +}; + +static void zfcp_fc_adisc_handler(unsigned long data) +{ + struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; + struct zfcp_port *port = adisc->els.port; + struct zfcp_ls_adisc_acc *ls_adisc = &adisc->ls_adisc_acc; + + if (adisc->els.status) { + /* request rejected or timed out */ + zfcp_erp_port_forced_reopen(port, 0, 63, NULL); + goto out; + } + + if (!port->wwnn) + port->wwnn = ls_adisc->wwnn; + + if (port->wwpn != ls_adisc->wwpn) + zfcp_erp_port_reopen(port, 0, 64, NULL); + + out: + zfcp_port_put(port); + kfree(adisc); +} + +static int zfcp_fc_adisc(struct zfcp_port *port) +{ + struct zfcp_els_adisc *adisc; + struct zfcp_adapter *adapter = port->adapter; + + adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); + if (!adisc) + return -ENOMEM; + + adisc->els.req = &adisc->req; + adisc->els.resp = &adisc->resp; + sg_init_one(adisc->els.req, &adisc->ls_adisc, + sizeof(struct zfcp_ls_adisc)); + sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, + sizeof(struct zfcp_ls_adisc_acc)); + + adisc->els.req_count = 1; + adisc->els.resp_count = 1; + adisc->els.adapter = adapter; + adisc->els.port = port; + adisc->els.d_id = port->d_id; + adisc->els.handler = zfcp_fc_adisc_handler; + adisc->els.handler_data = (unsigned long) adisc; + adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; + + /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports + without FC-AL-2 capability, so we don't set it */ + adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); + adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); + adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); + + return zfcp_fsf_send_els(&adisc->els); +} + +/** + * zfcp_test_link - lightweight link test procedure + * @port: port to be tested + * + * Test status of a link to a remote port using the ELS command ADISC. + * If there is a problem with the remote port, error recovery steps + * will be triggered. + */ +void zfcp_test_link(struct zfcp_port *port) +{ + int retval; + + zfcp_port_get(port); + retval = zfcp_fc_adisc(port); + if (retval == 0 || retval == -EBUSY) + return; + + /* send of ADISC was not possible */ + zfcp_port_put(port); + zfcp_erp_port_forced_reopen(port, 0, 65, NULL); +} + +static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter) +{ + int ret; + + if (!adapter->nameserver_port) + return -EINTR; + + if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &adapter->nameserver_port->status)) { + ret = zfcp_erp_port_reopen(adapter->nameserver_port, 0, 148, + NULL); + if (ret) + return ret; + zfcp_erp_wait(adapter); + zfcp_port_put(adapter->nameserver_port); + } + return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &adapter->nameserver_port->status); +} + +static void zfcp_gpn_ft_handler(unsigned long _done) +{ + complete((struct completion *)_done); +} + +static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft) +{ + struct scatterlist *sg = &gpn_ft->sg_req; + + kfree(sg_virt(sg)); /* free request buffer */ + zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS); + + kfree(gpn_ft); +} + +static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void) +{ + struct zfcp_gpn_ft *gpn_ft; + struct ct_iu_gpn_ft_req *req; + + gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); + if (!gpn_ft) + return NULL; + + req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); + if (!req) { + kfree(gpn_ft); + gpn_ft = NULL; + goto out; + } + sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); + + if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) { + zfcp_free_sg_env(gpn_ft); + gpn_ft = NULL; + } +out: + return gpn_ft; +} + + +static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, + struct zfcp_adapter *adapter) +{ + struct zfcp_send_ct *ct = &gpn_ft->ct; + struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); + struct completion done; + int ret; + + /* prepare CT IU for GPN_FT */ + req->header.revision = ZFCP_CT_REVISION; + req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; + req->header.gs_subtype = ZFCP_CT_NAME_SERVER; + req->header.options = ZFCP_CT_SYNCHRONOUS; + req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; + req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) * + (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2; + req->flags = 0; + req->domain_id_scope = 0; + req->area_id_scope = 0; + req->fc4_type = ZFCP_CT_SCSI_FCP; + + /* prepare zfcp_send_ct */ + ct->port = adapter->nameserver_port; + ct->handler = zfcp_gpn_ft_handler; + ct->handler_data = (unsigned long)&done; + ct->timeout = 10; + ct->req = &gpn_ft->sg_req; + ct->resp = gpn_ft->sg_resp; + ct->req_count = 1; + ct->resp_count = ZFCP_GPN_FT_BUFFERS; + + init_completion(&done); + ret = zfcp_fsf_send_ct(ct, NULL, NULL); + if (!ret) + wait_for_completion(&done); + return ret; +} + +static void zfcp_validate_port(struct zfcp_port *port) +{ + struct zfcp_adapter *adapter = port->adapter; + + atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); + + if (port == adapter->nameserver_port) + return; + if ((port->supported_classes != 0) || (port->units != 0)) { + zfcp_port_put(port); + return; + } + zfcp_erp_port_shutdown(port, 0, 151, NULL); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); +} + +static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft) +{ + struct zfcp_send_ct *ct = &gpn_ft->ct; + struct scatterlist *sg = gpn_ft->sg_resp; + struct ct_hdr *hdr = sg_virt(sg); + struct gpn_ft_resp_acc *acc = sg_virt(sg); + struct zfcp_adapter *adapter = ct->port->adapter; + struct zfcp_port *port, *tmp; + u32 d_id; + int ret = 0, x; + + if (ct->status) + return -EIO; + + if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { + if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) + return -EAGAIN; /* might be a temporary condition */ + return -EIO; + } + + if (hdr->max_res_size) + return -E2BIG; + + down(&zfcp_data.config_sema); + + /* first entry is the header */ + for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES; x++) { + if (x % (ZFCP_GPN_FT_ENTRIES + 1)) + acc++; + else + acc = sg_virt(++sg); + + d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | + acc->port_id[2]; + + /* skip the adapter's port and known remote ports */ + if (acc->wwpn == fc_host_port_name(adapter->scsi_host) || + zfcp_get_port_by_did(adapter, d_id)) + continue; + + port = zfcp_port_enqueue(adapter, acc->wwpn, + ZFCP_STATUS_PORT_DID_DID | + ZFCP_STATUS_COMMON_NOESC, d_id); + if (IS_ERR(port)) + ret = PTR_ERR(port); + else + zfcp_erp_port_reopen(port, 0, 149, NULL); + if (acc->control & 0x80) /* last entry */ + break; + } + + zfcp_erp_wait(adapter); + list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) + zfcp_validate_port(port); + up(&zfcp_data.config_sema); + return ret; +} + +/** + * zfcp_scan_ports - scan remote ports and attach new ports + * @adapter: pointer to struct zfcp_adapter + */ +int zfcp_scan_ports(struct zfcp_adapter *adapter) +{ + int ret, i; + struct zfcp_gpn_ft *gpn_ft; + + zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */ + if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT) + return 0; + + ret = zfcp_scan_get_nameserver(adapter); + if (ret) + return ret; + + gpn_ft = zfcp_alloc_sg_env(); + if (!gpn_ft) + return -ENOMEM; + + for (i = 0; i < 3; i++) { + ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter); + if (!ret) { + ret = zfcp_scan_eval_gpn_ft(gpn_ft); + if (ret == -EAGAIN) + ssleep(1); + else + break; + } + } + zfcp_free_sg_env(gpn_ft); + + return ret; +} + + +void _zfcp_scan_ports_later(struct work_struct *work) +{ + zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); +} diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index b2ea4ea..19c1ca9 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -1,54 +1,37 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Implementation of FSF commands. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); -static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_fcp_command_task_management_handler( - struct zfcp_fsf_req *); -static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); -static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); -static inline int zfcp_fsf_req_sbal_check( - unsigned long *, struct zfcp_qdio_queue *, int); -static inline int zfcp_use_one_sbal( - struct scatterlist *, int, struct scatterlist *, int); -static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); -static int zfcp_fsf_req_send(struct zfcp_fsf_req *); -static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); -static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); -static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); -static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8, - struct fsf_link_down_info *); -static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); +static void zfcp_fsf_request_timeout_handler(unsigned long data) +{ + struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; + zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62, + NULL); +} + +static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, + unsigned long timeout) +{ + fsf_req->timer.function = zfcp_fsf_request_timeout_handler; + fsf_req->timer.data = (unsigned long) fsf_req->adapter; + fsf_req->timer.expires = jiffies + timeout; + add_timer(&fsf_req->timer); +} + +static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) +{ + BUG_ON(!fsf_req->erp_action); + fsf_req->timer.function = zfcp_erp_timeout_handler; + fsf_req->timer.data = (unsigned long) fsf_req->erp_action; + fsf_req->timer.expires = jiffies + 30 * HZ; + add_timer(&fsf_req->timer); +} /* association between FSF command and FSF QTCB type */ static u32 fsf_qtcb_type[] = { @@ -67,96 +50,77 @@ static u32 fsf_qtcb_type[] = { [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND }; -static const char zfcp_act_subtable_type[5][8] = { +static const char *zfcp_act_subtable_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" }; -/****************************************************************/ -/*************** FSF related Functions *************************/ -/****************************************************************/ - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF - -/* - * function: zfcp_fsf_req_alloc - * - * purpose: Obtains an fsf_req and potentially a qtcb (for all but - * unsolicited requests) via helper functions - * Does some initial fsf request set-up. - * - * returns: pointer to allocated fsf_req if successfull - * NULL otherwise - * - * locks: none - * - */ -static struct zfcp_fsf_req * -zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) +static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table) { - size_t size; - void *ptr; - struct zfcp_fsf_req *fsf_req = NULL; + u16 subtable = table >> 16; + u16 rule = table & 0xffff; - if (req_flags & ZFCP_REQ_NO_QTCB) - size = sizeof(struct zfcp_fsf_req); - else - size = sizeof(struct zfcp_fsf_req_qtcb); - - if (likely(pool)) - ptr = mempool_alloc(pool, GFP_ATOMIC); - else { - if (req_flags & ZFCP_REQ_NO_QTCB) - ptr = kmalloc(size, GFP_ATOMIC); - else - ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, - GFP_ATOMIC); - } - - if (unlikely(!ptr)) - goto out; - - memset(ptr, 0, size); + if (subtable && subtable < ARRAY_SIZE(zfcp_act_subtable_type)) + dev_warn(&adapter->ccw_device->dev, + "Access denied in subtable %s, rule %d.\n", + zfcp_act_subtable_type[subtable], rule); +} - if (req_flags & ZFCP_REQ_NO_QTCB) { - fsf_req = (struct zfcp_fsf_req *) ptr; - } else { - fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req; - fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb; - } +static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req, + struct zfcp_port *port) +{ + struct fsf_qtcb_header *header = &req->qtcb->header; + dev_warn(&req->adapter->ccw_device->dev, + "Access denied, cannot send command to port 0x%016Lx.\n", + port->wwpn); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); + zfcp_erp_port_access_denied(port, 55, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; +} - fsf_req->pool = pool; +static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req, + struct zfcp_unit *unit) +{ + struct fsf_qtcb_header *header = &req->qtcb->header; + dev_warn(&req->adapter->ccw_device->dev, + "Access denied for unit 0x%016Lx on port 0x%016Lx.\n", + unit->fcp_lun, unit->port->wwpn); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); + zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); + zfcp_erp_unit_access_denied(unit, 59, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; +} - out: - return fsf_req; +static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) +{ + dev_err(&req->adapter->ccw_device->dev, + "Required FC class not supported by adapter, " + "shutting down adapter.\n"); + zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } -/* - * function: zfcp_fsf_req_free - * - * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or - * returns it into the pool via helper functions. - * - * returns: sod all - * - * locks: none +/** + * zfcp_fsf_req_free - free memory used by fsf request + * @fsf_req: pointer to struct zfcp_fsf_req */ -void -zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) +void zfcp_fsf_req_free(struct zfcp_fsf_req *req) { - if (likely(fsf_req->pool)) { - mempool_free(fsf_req, fsf_req->pool); + if (likely(req->pool)) { + mempool_free(req, req->pool); return; } - if (fsf_req->qtcb) { - kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req); + if (req->qtcb) { + kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req); return; } - - kfree(fsf_req); } -/* +/** + * zfcp_fsf_req_dismiss_all - dismiss all fsf requests + * @adapter: pointer to struct zfcp_adapter + * * Never ever call this without shutting down the adapter first. * Otherwise the adapter would continue using and corrupting s390 storage. * Included BUG_ON() call to ensure this is done. @@ -164,2353 +128,1359 @@ zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) */ void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) { - struct zfcp_fsf_req *fsf_req, *tmp; + struct zfcp_fsf_req *req, *tmp; unsigned long flags; LIST_HEAD(remove_queue); unsigned int i; - BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)); + BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP); spin_lock_irqsave(&adapter->req_list_lock, flags); - atomic_set(&adapter->reqs_active, 0); for (i = 0; i < REQUEST_LIST_SIZE; i++) list_splice_init(&adapter->req_list[i], &remove_queue); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { - list_del(&fsf_req->list); - fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; - zfcp_fsf_req_complete(fsf_req); + list_for_each_entry_safe(req, tmp, &remove_queue, list) { + list_del(&req->list); + req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; + zfcp_fsf_req_complete(req); } } -/* - * function: zfcp_fsf_req_complete - * - * purpose: Updates active counts and timers for openfcp-reqs - * May cleanup request after req_eval returns - * - * returns: 0 - success - * !0 - failure - * - * context: - */ -int -zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) { - int retval = 0; - int cleanup; - - if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { - ZFCP_LOG_DEBUG("Status read response received\n"); - /* - * Note: all cleanup handling is done in the callchain of - * the function call-chain below. - */ - zfcp_fsf_status_read_handler(fsf_req); - goto out; - } else { - del_timer(&fsf_req->timer); - zfcp_fsf_protstatus_eval(fsf_req); - } - - /* - * fsf_req may be deleted due to waking up functions, so - * cleanup is saved here and used later - */ - if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) - cleanup = 1; - else - cleanup = 0; - - fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; + struct fsf_status_read_buffer *sr_buf = req->data; + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_port *port; + int d_id = sr_buf->d_id & ZFCP_DID_MASK; + unsigned long flags; - /* cleanup request if requested by initiator */ - if (likely(cleanup)) { - ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); - /* - * lock must not be held here since it will be - * grabed by the called routine, too - */ - zfcp_fsf_req_free(fsf_req); - } else { - /* notify initiator waiting for the requests completion */ - ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); - /* - * FIXME: Race! We must not access fsf_req here as it might have been - * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED - * flag. It's an improbable case. But, we have the same paranoia for - * the cleanup flag already. - * Might better be handled using complete()? - * (setting the flag and doing wakeup ought to be atomic - * with regard to checking the flag as long as waitqueue is - * part of the to be released structure) - */ - wake_up(&fsf_req->completion_wq); - } + read_lock_irqsave(&zfcp_data.config_lock, flags); + list_for_each_entry(port, &adapter->port_list_head, list) + if (port->d_id == d_id) { + read_unlock_irqrestore(&zfcp_data.config_lock, flags); + switch (sr_buf->status_subtype) { + case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: + zfcp_erp_port_reopen(port, 0, 101, req); + break; + case FSF_STATUS_READ_SUB_ERROR_PORT: + zfcp_erp_port_shutdown(port, 0, 122, req); + break; + } + return; + } + read_unlock_irqrestore(&zfcp_data.config_lock, flags); +} - out: - return retval; +static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_status_read_buffer *sr_buf = req->data; + struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error; + + dev_warn(&adapter->ccw_device->dev, + "Warning: bit error threshold data " + "received for the adapter: " + "link failures = %i, loss of sync errors = %i, " + "loss of signal errors = %i, " + "primitive sequence errors = %i, " + "invalid transmission word errors = %i, " + "CRC errors = %i).\n", + err->link_failure_error_count, + err->loss_of_sync_error_count, + err->loss_of_signal_error_count, + err->primitive_sequence_error_count, + err->invalid_transmission_word_error_count, + err->crc_error_count); + dev_warn(&adapter->ccw_device->dev, + "Additional bit error threshold data of the adapter: " + "primitive sequence event time-outs = %i, " + "elastic buffer overrun errors = %i, " + "advertised receive buffer-to-buffer credit = %i, " + "current receice buffer-to-buffer credit = %i, " + "advertised transmit buffer-to-buffer credit = %i, " + "current transmit buffer-to-buffer credit = %i).\n", + err->primitive_sequence_event_timeout_count, + err->elastic_buffer_overrun_error_count, + err->advertised_receive_b2b_credit, + err->current_receive_b2b_credit, + err->advertised_transmit_b2b_credit, + err->current_transmit_b2b_credit); } -/* - * function: zfcp_fsf_protstatus_eval - * - * purpose: evaluates the QTCB of the finished FSF request - * and initiates appropriate actions - * (usually calling FSF command specific handlers) - * - * returns: - * - * context: - * - * locks: - */ -static int -zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id, + struct fsf_link_down_info *link_down) { - int retval = 0; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_qtcb *qtcb = fsf_req->qtcb; - union fsf_prot_status_qual *prot_status_qual = - &qtcb->prefix.prot_status_qual; - - zfcp_hba_dbf_event_fsf_response(fsf_req); - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { - ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", - (unsigned long) fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ - goto skip_protstatus; - } + struct zfcp_adapter *adapter = req->adapter; - /* evaluate FSF Protocol Status */ - switch (qtcb->prefix.prot_status) { + if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) + return; - case FSF_PROT_GOOD: - case FSF_PROT_FSF_STATUS_PRESENTED: - break; + atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); - case FSF_PROT_QTCB_VERSION_ERROR: - ZFCP_LOG_NORMAL("error: The adapter %s contains " - "microcode of version 0x%x, the device driver " - "only supports 0x%x. Aborting.\n", - zfcp_get_busid_by_adapter(adapter), - prot_status_qual->version_error.fsf_version, - ZFCP_QTCB_VERSION); - zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + if (!link_down) + goto out; - case FSF_PROT_SEQ_NUMB_ERROR: - ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " - "driver (0x%x) and adapter %s (0x%x). " - "Restarting all operations on this adapter.\n", - qtcb->prefix.req_seq_no, - zfcp_get_busid_by_adapter(adapter), - prot_status_qual->sequence_error.exp_req_seq_no); - zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + switch (link_down->error_code) { + case FSF_PSQ_LINK_NO_LIGHT: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: no light detected.\n"); break; - - case FSF_PROT_UNSUPP_QTCB_TYPE: - ZFCP_LOG_NORMAL("error: Packet header type used by the " - "device driver is incompatible with " - "that used on adapter %s. " - "Stopping all operations on this adapter.\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_WRAP_PLUG: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: wrap plug detected.\n"); break; - - case FSF_PROT_HOST_CONNECTION_INITIALIZING: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &(adapter->status)); + case FSF_PSQ_LINK_NO_FCP: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "adjacent node on link does not support FCP.\n"); break; - - case FSF_PROT_DUPLICATE_REQUEST_ID: - ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " - "to the adapter %s is ambiguous. " - "Stopping all operations on this adapter.\n", - *(unsigned long long*) - (&qtcb->bottom.support.req_handle), - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_FIRMWARE_UPDATE: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "firmware update in progress.\n"); break; - - case FSF_PROT_LINK_DOWN: - zfcp_fsf_link_down_info_eval(fsf_req, 37, - &prot_status_qual->link_down_info); - /* FIXME: reopening adapter now? better wait for link up */ - zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_INVALID_WWPN: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "duplicate or invalid WWPN detected.\n"); break; - - case FSF_PROT_REEST_QUEUE: - ZFCP_LOG_NORMAL("The local link to adapter with " - "%s was re-plugged. " - "Re-starting operations on this adapter.\n", - zfcp_get_busid_by_adapter(adapter)); - /* All ports should be marked as ready to run again */ - zfcp_erp_modify_adapter_status(adapter, 28, NULL, - ZFCP_STATUS_COMMON_RUNNING, - ZFCP_SET); - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED - | ZFCP_STATUS_COMMON_ERP_FAILED, - 99, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_NO_NPIV_SUPPORT: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "no support for NPIV by Fabric.\n"); break; - - case FSF_PROT_ERROR_STATE: - ZFCP_LOG_NORMAL("error: The adapter %s " - "has entered the error state. " - "Restarting all operations on this " - "adapter.\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_PSQ_LINK_NO_FCP_RESOURCES: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "out of resource in FCP daughtercard.\n"); + break; + case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "out of resource in Fabric.\n"); + break; + case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: + dev_warn(&req->adapter->ccw_device->dev, + "The local link is down: " + "unable to login to Fabric.\n"); + break; + case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: + dev_warn(&req->adapter->ccw_device->dev, + "WWPN assignment file corrupted on adapter.\n"); + break; + case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: + dev_warn(&req->adapter->ccw_device->dev, + "Mode table corrupted on adapter.\n"); + break; + case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: + dev_warn(&req->adapter->ccw_device->dev, + "No WWPN for assignment table on adapter.\n"); break; - default: - ZFCP_LOG_NORMAL("bug: Transfer protocol status information " - "provided by the adapter %s " - "is not compatible with the device driver. " - "Stopping all operations on this adapter. " - "(debug info 0x%x).\n", - zfcp_get_busid_by_adapter(adapter), - qtcb->prefix.prot_status); - zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + dev_warn(&req->adapter->ccw_device->dev, + "The local link to adapter is down.\n"); } +out: + zfcp_erp_adapter_failed(adapter, id, req); +} - skip_protstatus: - /* - * always call specific handlers to give them a chance to do - * something meaningful even in error cases - */ - zfcp_fsf_fsfstatus_eval(fsf_req); - return retval; +static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_status_read_buffer *sr_buf = req->data; + struct fsf_link_down_info *ldi = + (struct fsf_link_down_info *) &sr_buf->payload; + + switch (sr_buf->status_subtype) { + case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: + dev_warn(&adapter->ccw_device->dev, + "Physical link is down.\n"); + zfcp_fsf_link_down_info_eval(req, 38, ldi); + break; + case FSF_STATUS_READ_SUB_FDISC_FAILED: + dev_warn(&adapter->ccw_device->dev, + "Local link is down " + "due to failed FDISC login.\n"); + zfcp_fsf_link_down_info_eval(req, 39, ldi); + break; + case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: + dev_warn(&adapter->ccw_device->dev, + "Local link is down " + "due to firmware update on adapter.\n"); + zfcp_fsf_link_down_info_eval(req, 40, NULL); + }; } -/* - * function: zfcp_fsf_fsfstatus_eval - * - * purpose: evaluates FSF status of completed FSF request - * and acts accordingly - * - * returns: - */ -static int -zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) { - int retval = 0; + struct zfcp_adapter *adapter = req->adapter; + struct fsf_status_read_buffer *sr_buf = req->data; - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { - goto skip_fsfstatus; + if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { + zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf); + mempool_free(sr_buf, adapter->pool.data_status_read); + zfcp_fsf_req_free(req); + return; } - /* evaluate FSF Status */ - switch (fsf_req->qtcb->header.fsf_status) { - case FSF_UNKNOWN_COMMAND: - ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " - "not known by the adapter %s " - "Stopping all operations on this adapter. " - "(debug info 0x%x).\n", - zfcp_get_busid_by_adapter(fsf_req->adapter), - fsf_req->qtcb->header.fsf_command); - zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf); - case FSF_FCP_RSP_AVAILABLE: - ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " - "SCSI stack.\n"); + switch (sr_buf->status_type) { + case FSF_STATUS_READ_PORT_CLOSED: + zfcp_fsf_status_read_port_closed(req); break; - - case FSF_ADAPTER_STATUS_AVAILABLE: - zfcp_fsf_fsfstatus_qual_eval(fsf_req); + case FSF_STATUS_READ_INCOMING_ELS: + zfcp_fc_incoming_els(req); + break; + case FSF_STATUS_READ_SENSE_DATA_AVAIL: + break; + case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: + zfcp_fsf_bit_error_threshold(req); + break; + case FSF_STATUS_READ_LINK_DOWN: + zfcp_fsf_status_read_link_down(req); + break; + case FSF_STATUS_READ_LINK_UP: + dev_info(&adapter->ccw_device->dev, + "Local link was replugged.\n"); + /* All ports should be marked as ready to run again */ + zfcp_erp_modify_adapter_status(adapter, 30, NULL, + ZFCP_STATUS_COMMON_RUNNING, + ZFCP_SET); + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, + 102, req); + break; + case FSF_STATUS_READ_NOTIFICATION_LOST: + if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED) + zfcp_erp_adapter_access_changed(adapter, 135, req); + if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) + schedule_work(&adapter->scan_work); + break; + case FSF_STATUS_READ_CFDC_UPDATED: + zfcp_erp_adapter_access_changed(adapter, 136, req); + break; + case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: + adapter->adapter_features = sr_buf->payload.word[0]; break; } - skip_fsfstatus: - /* - * always call specific handlers to give them a chance to do - * something meaningful even in error cases - */ - zfcp_fsf_req_dispatch(fsf_req); + mempool_free(sr_buf, adapter->pool.data_status_read); + zfcp_fsf_req_free(req); - return retval; + atomic_inc(&adapter->stat_miss); + schedule_work(&adapter->stat_work); } -/* - * function: zfcp_fsf_fsfstatus_qual_eval - * - * purpose: evaluates FSF status-qualifier of completed FSF request - * and acts accordingly - * - * returns: - */ -static int -zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) { - int retval = 0; - - switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { + switch (req->qtcb->header.fsf_status_qual.word[0]) { case FSF_SQ_FCP_RSP_AVAILABLE: - break; - case FSF_SQ_RETRY_IF_POSSIBLE: - /* The SCSI-stack may now issue retries or escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - case FSF_SQ_COMMAND_ABORTED: - /* Carry the aborted state on to upper layer */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - case FSF_SQ_NO_RECOM: - ZFCP_LOG_NORMAL("bug: No recommendation could be given for a " - "problem on the adapter %s " - "Stopping all operations on this adapter. ", - zfcp_get_busid_by_adapter(fsf_req->adapter)); - zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - case FSF_SQ_ULP_PROGRAMMING_ERROR: - ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " - "(adapter %s)\n", - zfcp_get_busid_by_adapter(fsf_req->adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: case FSF_SQ_NO_RETRY_POSSIBLE: case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* dealt with in the respective functions */ + return; + case FSF_SQ_COMMAND_ABORTED: + req->status |= ZFCP_STATUS_FSFREQ_ABORTED; break; - default: - ZFCP_LOG_NORMAL("bug: Additional status info could " - "not be interpreted properly.\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + case FSF_SQ_NO_RECOM: + dev_err(&req->adapter->ccw_device->dev, + "No recommendation could be given for a " + "problem on the adapter.\n"); + zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req); break; } - - return retval; + /* all non-return stats set FSFREQ_ERROR*/ + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } -/** - * zfcp_fsf_link_down_info_eval - evaluate link down information block - */ -static void -zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id, - struct fsf_link_down_info *link_down) +static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) { - struct zfcp_adapter *adapter = fsf_req->adapter; - - if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, - &adapter->status)) + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) return; - atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); - - if (link_down == NULL) - goto out; - - switch (link_down->error_code) { - case FSF_PSQ_LINK_NO_LIGHT: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(no light detected)\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_PSQ_LINK_WRAP_PLUG: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(wrap plug detected)\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_PSQ_LINK_NO_FCP: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(adjacent node on link does not support FCP)\n", - zfcp_get_busid_by_adapter(adapter)); + switch (req->qtcb->header.fsf_status) { + case FSF_UNKNOWN_COMMAND: + dev_err(&req->adapter->ccw_device->dev, + "Command issued by the device driver (0x%x) is " + "not known by the adapter.\n", + req->qtcb->header.fsf_command); + zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_PSQ_LINK_FIRMWARE_UPDATE: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(firmware update in progress)\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_PSQ_LINK_INVALID_WWPN: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(duplicate or invalid WWPN detected)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_ADAPTER_STATUS_AVAILABLE: + zfcp_fsf_fsfstatus_qual_eval(req); break; - case FSF_PSQ_LINK_NO_NPIV_SUPPORT: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(no support for NPIV by Fabric)\n", - zfcp_get_busid_by_adapter(adapter)); + } +} + +static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb *qtcb = req->qtcb; + union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; + + zfcp_hba_dbf_event_fsf_response(req); + + if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ + return; + } + + switch (qtcb->prefix.prot_status) { + case FSF_PROT_GOOD: + case FSF_PROT_FSF_STATUS_PRESENTED: + return; + case FSF_PROT_QTCB_VERSION_ERROR: + dev_err(&adapter->ccw_device->dev, + "The QTCB version requested by zfcp (0x%x) is not " + "supported by the FCP adapter (lowest supported " + "0x%x, highest supported 0x%x).\n", + FSF_QTCB_CURRENT_VERSION, psq->word[0], + psq->word[1]); + zfcp_erp_adapter_shutdown(adapter, 0, 117, req); break; - case FSF_PSQ_LINK_NO_FCP_RESOURCES: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(out of resource in FCP daughtercard)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_ERROR_STATE: + case FSF_PROT_SEQ_NUMB_ERROR: + zfcp_erp_adapter_reopen(adapter, 0, 98, req); + req->status |= ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(out of resource in Fabric)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_UNSUPP_QTCB_TYPE: + dev_err(&adapter->ccw_device->dev, + "Packet header type used by the device driver is " + "incompatible with that used on the adapter.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 118, req); break; - case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(unable to Fabric login)\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_HOST_CONNECTION_INITIALIZING: + atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); break; - case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: - ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_DUPLICATE_REQUEST_ID: + dev_err(&adapter->ccw_device->dev, + "The request identifier 0x%Lx is ambiguous.\n", + (unsigned long long)qtcb->bottom.support.req_handle); + zfcp_erp_adapter_shutdown(adapter, 0, 78, req); break; - case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: - ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_LINK_DOWN: + zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info); + /* FIXME: reopening adapter now? better wait for link up */ + zfcp_erp_adapter_reopen(adapter, 0, 79, req); break; - case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: - ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + case FSF_PROT_REEST_QUEUE: + /* All ports should be marked as ready to run again */ + zfcp_erp_modify_adapter_status(adapter, 28, NULL, + ZFCP_STATUS_COMMON_RUNNING, + ZFCP_SET); + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, 99, req); break; default: - ZFCP_LOG_NORMAL("The local link to adapter %s is down " - "(warning: unknown reason code %d)\n", - zfcp_get_busid_by_adapter(adapter), - link_down->error_code); - } - - if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) - ZFCP_LOG_DEBUG("Debug information to link down: " - "primary_status=0x%02x " - "ioerr_code=0x%02x " - "action_code=0x%02x " - "reason_code=0x%02x " - "explanation_code=0x%02x " - "vendor_specific_code=0x%02x\n", - link_down->primary_status, - link_down->ioerr_code, - link_down->action_code, - link_down->reason_code, - link_down->explanation_code, - link_down->vendor_specific_code); - - out: - zfcp_erp_adapter_failed(adapter, id, fsf_req); + dev_err(&adapter->ccw_device->dev, + "Transfer protocol status information" + "provided by the adapter (0x%x) " + "is not compatible with the device driver.\n", + qtcb->prefix.prot_status); + zfcp_erp_adapter_shutdown(adapter, 0, 119, req); + } + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } -/* - * function: zfcp_fsf_req_dispatch - * - * purpose: calls the appropriate command specific handler +/** + * zfcp_fsf_req_complete - process completion of a FSF request + * @fsf_req: The FSF request that has been completed. * - * returns: + * When a request has been completed either from the FCP adapter, + * or it has been dismissed due to a queue shutdown, this function + * is called to process the completion status and trigger further + * events related to the FSF request. */ -static int -zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) +void zfcp_fsf_req_complete(struct zfcp_fsf_req *req) { - struct zfcp_erp_action *erp_action = fsf_req->erp_action; - struct zfcp_adapter *adapter = fsf_req->adapter; - int retval = 0; + if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { + zfcp_fsf_status_read_handler(req); + return; + } + del_timer(&req->timer); + zfcp_fsf_protstatus_eval(req); + zfcp_fsf_fsfstatus_eval(req); + req->handler(req); - switch (fsf_req->fsf_command) { + if (req->erp_action) + zfcp_erp_notify(req->erp_action, 0); + req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; - case FSF_QTCB_FCP_CMND: - zfcp_fsf_send_fcp_command_handler(fsf_req); - break; + if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) + zfcp_fsf_req_free(req); + else + /* notify initiator waiting for the requests completion */ + /* + * FIXME: Race! We must not access fsf_req here as it might have been + * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED + * flag. It's an improbable case. But, we have the same paranoia for + * the cleanup flag already. + * Might better be handled using complete()? + * (setting the flag and doing wakeup ought to be atomic + * with regard to checking the flag as long as waitqueue is + * part of the to be released structure) + */ + wake_up(&req->completion_wq); +} - case FSF_QTCB_ABORT_FCP_CMND: - zfcp_fsf_abort_fcp_command_handler(fsf_req); - break; +static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) +{ + struct fsf_qtcb_bottom_config *bottom; + struct zfcp_adapter *adapter = req->adapter; + struct Scsi_Host *shost = adapter->scsi_host; - case FSF_QTCB_SEND_GENERIC: - zfcp_fsf_send_ct_handler(fsf_req); - break; + bottom = &req->qtcb->bottom.config; - case FSF_QTCB_OPEN_PORT_WITH_DID: - zfcp_fsf_open_port_handler(fsf_req); - break; + if (req->data) + memcpy(req->data, bottom, sizeof(*bottom)); - case FSF_QTCB_OPEN_LUN: - zfcp_fsf_open_unit_handler(fsf_req); - break; + fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; + fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; + fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; + fc_host_speed(shost) = bottom->fc_link_speed; + fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; - case FSF_QTCB_CLOSE_LUN: - zfcp_fsf_close_unit_handler(fsf_req); - break; + adapter->hydra_version = bottom->adapter_type; + adapter->timer_ticks = bottom->timer_interval; - case FSF_QTCB_CLOSE_PORT: - zfcp_fsf_close_port_handler(fsf_req); - break; + if (fc_host_permanent_port_name(shost) == -1) + fc_host_permanent_port_name(shost) = fc_host_port_name(shost); - case FSF_QTCB_CLOSE_PHYSICAL_PORT: - zfcp_fsf_close_physical_port_handler(fsf_req); - break; + switch (bottom->fc_topology) { + case FSF_TOPO_P2P: + adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; + adapter->peer_wwpn = bottom->plogi_payload.wwpn; + adapter->peer_wwnn = bottom->plogi_payload.wwnn; + fc_host_port_type(shost) = FC_PORTTYPE_PTP; + if (req->erp_action) + dev_info(&adapter->ccw_device->dev, + "Point-to-Point fibrechannel " + "configuration detected.\n"); + break; + case FSF_TOPO_FABRIC: + fc_host_port_type(shost) = FC_PORTTYPE_NPORT; + if (req->erp_action) + dev_info(&adapter->ccw_device->dev, + "Switched fabric fibrechannel " + "network detected.\n"); + break; + case FSF_TOPO_AL: + fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; + dev_err(&adapter->ccw_device->dev, + "Unsupported arbitrated loop fibrechannel " + "topology detected, shutting down " + "adapter.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 127, req); + return -EIO; + default: + fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; + dev_err(&adapter->ccw_device->dev, + "The fibrechannel topology reported by the" + " adapter is not known by the zfcp driver," + " shutting down adapter.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 128, req); + return -EIO; + } - case FSF_QTCB_EXCHANGE_CONFIG_DATA: - zfcp_fsf_exchange_config_data_handler(fsf_req); - break; + return 0; +} - case FSF_QTCB_EXCHANGE_PORT_DATA: - zfcp_fsf_exchange_port_data_handler(fsf_req); - break; +static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb *qtcb = req->qtcb; + struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config; + struct Scsi_Host *shost = adapter->scsi_host; - case FSF_QTCB_SEND_ELS: - zfcp_fsf_send_els_handler(fsf_req); - break; + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) + return; - case FSF_QTCB_DOWNLOAD_CONTROL_FILE: - zfcp_fsf_control_file_handler(fsf_req); - break; + adapter->fsf_lic_version = bottom->lic_version; + adapter->adapter_features = bottom->adapter_features; + adapter->connection_features = bottom->connection_features; + adapter->peer_wwpn = 0; + adapter->peer_wwnn = 0; + adapter->peer_d_id = 0; - case FSF_QTCB_UPLOAD_CONTROL_FILE: - zfcp_fsf_control_file_handler(fsf_req); + switch (qtcb->header.fsf_status) { + case FSF_GOOD: + if (zfcp_fsf_exchange_config_evaluate(req)) + return; + + if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { + dev_err(&adapter->ccw_device->dev, + "Maximum QTCB size (%d bytes) allowed by " + "the adapter is lower than the minimum " + "required by the driver (%ld bytes).\n", + bottom->max_qtcb_size, + sizeof(struct fsf_qtcb)); + zfcp_erp_adapter_shutdown(adapter, 0, 129, req); + return; + } + atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, + &adapter->status); break; + case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: + fc_host_node_name(shost) = 0; + fc_host_port_name(shost) = 0; + fc_host_port_id(shost) = 0; + fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; + fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; + adapter->hydra_version = 0; + atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, + &adapter->status); + + zfcp_fsf_link_down_info_eval(req, 42, + &qtcb->header.fsf_status_qual.link_down_info); + break; default: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " - "not supported by the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) - ZFCP_LOG_NORMAL - ("bug: Command issued by the device driver differs " - "from the command returned by the adapter %s " - "(debug info 0x%x, 0x%x).\n", - zfcp_get_busid_by_adapter(adapter), - fsf_req->fsf_command, - fsf_req->qtcb->header.fsf_command); + zfcp_erp_adapter_shutdown(adapter, 0, 130, req); + return; } - if (!erp_action) - return retval; - - zfcp_erp_async_handler(erp_action, 0); + if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { + adapter->hardware_version = bottom->hardware_version; + memcpy(fc_host_serial_number(shost), bottom->serial_number, + min(FC_SERIAL_NUMBER_SIZE, 17)); + EBCASC(fc_host_serial_number(shost), + min(FC_SERIAL_NUMBER_SIZE, 17)); + } - return retval; + if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) { + dev_err(&adapter->ccw_device->dev, + "The adapter only supports newer control block " + "versions, try updated device driver.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 125, req); + return; + } + if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) { + dev_err(&adapter->ccw_device->dev, + "The adapter only supports older control block " + "versions, consider a microcode upgrade.\n"); + zfcp_erp_adapter_shutdown(adapter, 0, 126, req); + } } -/* - * function: zfcp_fsf_status_read - * - * purpose: initiates a Status Read command at the specified adapter - * - * returns: - */ -int -zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) +static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) { - struct zfcp_fsf_req *fsf_req; - struct fsf_status_read_buffer *status_buffer; - unsigned long lock_flags; - volatile struct qdio_buffer_element *sbale; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, - req_flags | ZFCP_REQ_NO_QTCB, - adapter->pool.fsf_req_status_read, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create unsolicited status " - "buffer for adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_req_create; - } - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; - sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->sbale_curr = 2; + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port; + struct Scsi_Host *shost = adapter->scsi_host; - status_buffer = - mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); - if (!status_buffer) { - ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); - goto failed_buf; - } - memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); - fsf_req->data = (unsigned long) status_buffer; + if (req->data) + memcpy(req->data, bottom, sizeof(*bottom)); - /* insert pointer to respective buffer */ - sbale = zfcp_qdio_sbale_curr(fsf_req); - sbale->addr = (void *) status_buffer; - sbale->length = sizeof(struct fsf_status_read_buffer); + if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) + fc_host_permanent_port_name(shost) = bottom->wwpn; + else + fc_host_permanent_port_name(shost) = fc_host_port_name(shost); + fc_host_maxframe_size(shost) = bottom->maximum_frame_size; + fc_host_supported_speeds(shost) = bottom->supported_speed; +} - retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " - "environment.\n"); - goto failed_req_send; - } +static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct fsf_qtcb *qtcb = req->qtcb; - ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", - zfcp_get_busid_by_adapter(adapter)); - goto out; + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) + return; - failed_req_send: - mempool_free(status_buffer, adapter->pool.data_status_read); + switch (qtcb->header.fsf_status) { + case FSF_GOOD: + zfcp_fsf_exchange_port_evaluate(req); + atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); + break; + case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: + zfcp_fsf_exchange_port_evaluate(req); + atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); + zfcp_fsf_link_down_info_eval(req, 43, + &qtcb->header.fsf_status_qual.link_down_info); + break; + } +} - failed_buf: - zfcp_fsf_req_free(fsf_req); - failed_req_create: - zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - return retval; +static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue) +{ + spin_lock(&queue->lock); + if (atomic_read(&queue->count)) + return 1; + spin_unlock(&queue->lock); + return 0; } -static int -zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) +static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) { - struct fsf_status_read_buffer *status_buffer; - struct zfcp_adapter *adapter; - struct zfcp_port *port; - unsigned long flags; + long ret; + struct zfcp_qdio_queue *req_q = &adapter->req_q; - status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; - adapter = fsf_req->adapter; + spin_unlock(&req_q->lock); + ret = wait_event_interruptible_timeout(adapter->request_wq, + zfcp_fsf_sbal_check(req_q), 5 * HZ); + if (ret > 0) + return 0; - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) - if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) - break; - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + spin_lock(&req_q->lock); + return -EIO; +} - if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { - ZFCP_LOG_NORMAL("bug: Reopen port indication received for " - "nonexisting port with d_id 0x%06x on " - "adapter %s. Ignored.\n", - status_buffer->d_id & ZFCP_DID_MASK, - zfcp_get_busid_by_adapter(adapter)); - goto out; - } +static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool) +{ + struct zfcp_fsf_req *req; + req = mempool_alloc(pool, GFP_ATOMIC); + if (!req) + return NULL; + memset(req, 0, sizeof(*req)); + return req; +} - switch (status_buffer->status_subtype) { +static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool) +{ + struct zfcp_fsf_req_qtcb *qtcb; - case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: - zfcp_erp_port_reopen(port, 0, 101, fsf_req); - break; + if (likely(pool)) + qtcb = mempool_alloc(pool, GFP_ATOMIC); + else + qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, + GFP_ATOMIC); + if (unlikely(!qtcb)) + return NULL; - case FSF_STATUS_READ_SUB_ERROR_PORT: - zfcp_erp_port_shutdown(port, 0, 122, fsf_req); - break; + memset(qtcb, 0, sizeof(*qtcb)); + qtcb->fsf_req.qtcb = &qtcb->qtcb; + qtcb->fsf_req.pool = pool; - default: - ZFCP_LOG_NORMAL("bug: Undefined status subtype received " - "for a reopen indication on port with " - "d_id 0x%06x on the adapter %s. " - "Ignored. (debug info 0x%x)\n", - status_buffer->d_id, - zfcp_get_busid_by_adapter(adapter), - status_buffer->status_subtype); - } - out: - return 0; + return &qtcb->fsf_req; } -/* - * function: zfcp_fsf_status_read_handler - * - * purpose: is called for finished Open Port command - * - * returns: - */ -static int -zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) +static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter, + u32 fsf_cmd, int req_flags, + mempool_t *pool) { - int retval = 0; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_status_read_buffer *status_buffer = - (struct fsf_status_read_buffer *) fsf_req->data; - struct fsf_bit_error_payload *fsf_bit_error; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { - zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); - mempool_free(status_buffer, adapter->pool.data_status_read); - zfcp_fsf_req_free(fsf_req); - goto out; - } + volatile struct qdio_buffer_element *sbale; - zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); + struct zfcp_fsf_req *req; + struct zfcp_qdio_queue *req_q = &adapter->req_q; - switch (status_buffer->status_type) { + if (req_flags & ZFCP_REQ_NO_QTCB) + req = zfcp_fsf_alloc_noqtcb(pool); + else + req = zfcp_fsf_alloc_qtcb(pool); - case FSF_STATUS_READ_PORT_CLOSED: - zfcp_fsf_status_read_port_closed(fsf_req); - break; + if (unlikely(!req)) + return ERR_PTR(-EIO); - case FSF_STATUS_READ_INCOMING_ELS: - zfcp_fsf_incoming_els(fsf_req); - break; + if (adapter->req_no == 0) + adapter->req_no++; - case FSF_STATUS_READ_SENSE_DATA_AVAIL: - ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - break; + INIT_LIST_HEAD(&req->list); + init_timer(&req->timer); + init_waitqueue_head(&req->completion_wq); - case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: - fsf_bit_error = (struct fsf_bit_error_payload *) - status_buffer->payload; - ZFCP_LOG_NORMAL("Warning: bit error threshold data " - "received (adapter %s, " - "link failures = %i, loss of sync errors = %i, " - "loss of signal errors = %i, " - "primitive sequence errors = %i, " - "invalid transmission word errors = %i, " - "CRC errors = %i)\n", - zfcp_get_busid_by_adapter(adapter), - fsf_bit_error->link_failure_error_count, - fsf_bit_error->loss_of_sync_error_count, - fsf_bit_error->loss_of_signal_error_count, - fsf_bit_error->primitive_sequence_error_count, - fsf_bit_error->invalid_transmission_word_error_count, - fsf_bit_error->crc_error_count); - ZFCP_LOG_INFO("Additional bit error threshold data " - "(adapter %s, " - "primitive sequence event time-outs = %i, " - "elastic buffer overrun errors = %i, " - "advertised receive buffer-to-buffer credit = %i, " - "current receice buffer-to-buffer credit = %i, " - "advertised transmit buffer-to-buffer credit = %i, " - "current transmit buffer-to-buffer credit = %i)\n", - zfcp_get_busid_by_adapter(adapter), - fsf_bit_error->primitive_sequence_event_timeout_count, - fsf_bit_error->elastic_buffer_overrun_error_count, - fsf_bit_error->advertised_receive_b2b_credit, - fsf_bit_error->current_receive_b2b_credit, - fsf_bit_error->advertised_transmit_b2b_credit, - fsf_bit_error->current_transmit_b2b_credit); - break; + req->adapter = adapter; + req->fsf_command = fsf_cmd; + req->req_id = adapter->req_no++; + req->sbal_number = 1; + req->sbal_first = req_q->first; + req->sbal_last = req_q->first; + req->sbale_curr = 1; - case FSF_STATUS_READ_LINK_DOWN: - switch (status_buffer->status_subtype) { - case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: - ZFCP_LOG_INFO("Physical link to adapter %s is down\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 38, - (struct fsf_link_down_info *) - &status_buffer->payload); - break; - case FSF_STATUS_READ_SUB_FDISC_FAILED: - ZFCP_LOG_INFO("Local link to adapter %s is down " - "due to failed FDISC login\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 39, - (struct fsf_link_down_info *) - &status_buffer->payload); - break; - case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: - ZFCP_LOG_INFO("Local link to adapter %s is down " - "due to firmware update on adapter\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL); - break; - default: - ZFCP_LOG_INFO("Local link to adapter %s is down " - "due to unknown reason\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL); - }; - break; + sbale = zfcp_qdio_sbale_req(req); + sbale[0].addr = (void *) req->req_id; + sbale[0].flags |= SBAL_FLAGS0_COMMAND; - case FSF_STATUS_READ_LINK_UP: - ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. " - "Restarting operations on this adapter\n", - zfcp_get_busid_by_adapter(adapter)); - /* All ports should be marked as ready to run again */ - zfcp_erp_modify_adapter_status(adapter, 30, NULL, - ZFCP_STATUS_COMMON_RUNNING, - ZFCP_SET); - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED - | ZFCP_STATUS_COMMON_ERP_FAILED, - 102, fsf_req); - break; + if (likely(req->qtcb)) { + req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no; + req->qtcb->prefix.req_id = req->req_id; + req->qtcb->prefix.ulp_info = 26; + req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command]; + req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; + req->qtcb->header.req_handle = req->req_id; + req->qtcb->header.fsf_command = req->fsf_command; + req->seq_no = adapter->fsf_req_seq_no; + req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; + sbale[1].addr = (void *) req->qtcb; + sbale[1].length = sizeof(struct fsf_qtcb); + } - case FSF_STATUS_READ_NOTIFICATION_LOST: - ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: " - "adapter %s%s%s%s%s%s%s%s%s\n", - zfcp_get_busid_by_adapter(adapter), - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_INCOMING_ELS) ? - ", incoming ELS" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_SENSE_DATA) ? - ", sense data" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_LINK_STATUS) ? - ", link status change" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_PORT_CLOSED) ? - ", port close" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ? - ", bit error exception" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_ACT_UPDATED) ? - ", ACT update" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_ACT_HARDENED) ? - ", ACT hardening" : "", - (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ? - ", adapter feature change" : ""); - - if (status_buffer->status_subtype & - FSF_STATUS_READ_SUB_ACT_UPDATED) - zfcp_erp_adapter_access_changed(adapter, 135, fsf_req); - break; + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) { + zfcp_fsf_req_free(req); + return ERR_PTR(-EIO); + } - case FSF_STATUS_READ_CFDC_UPDATED: - ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_access_changed(adapter, 136, fsf_req); - break; + if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) + req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - case FSF_STATUS_READ_CFDC_HARDENED: - switch (status_buffer->status_subtype) { - case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: - ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: - ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied " - "to the secondary SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - default: - ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n", - zfcp_get_busid_by_adapter(adapter)); - } - break; + return req; +} - case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: - ZFCP_LOG_INFO("List of supported features on adapter %s has " - "been changed from 0x%08X to 0x%08X\n", - zfcp_get_busid_by_adapter(adapter), - *(u32*) (status_buffer->payload + 4), - *(u32*) (status_buffer->payload)); - adapter->adapter_features = *(u32*) status_buffer->payload; - break; +static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) +{ + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_qdio_queue *req_q = &adapter->req_q; + int idx; - default: - ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown " - "type was received (debug info 0x%x)\n", - status_buffer->status_type); - ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", - status_buffer); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) status_buffer, - sizeof (struct fsf_status_read_buffer)); - break; - } - mempool_free(status_buffer, adapter->pool.data_status_read); - zfcp_fsf_req_free(fsf_req); - /* - * recycle buffer and start new request repeat until outbound - * queue is empty or adapter shutdown is requested - */ - /* - * FIXME(qdio): - * we may wait in the req_create for 5s during shutdown, so - * qdio_cleanup will have to wait at least that long before returning - * with failure to allow us a proper cleanup under all circumstances - */ - /* - * FIXME: - * allocation failure possible? (Is this code needed?) - */ - retval = zfcp_fsf_status_read(adapter, 0); - if (retval < 0) { - ZFCP_LOG_INFO("Failed to create unsolicited status read " - "request for the adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - /* temporary fix to avoid status read buffer shortage */ - adapter->status_read_failed++; - if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) - < ZFCP_STATUS_READ_FAILED_THRESHOLD) { - ZFCP_LOG_INFO("restart adapter %s due to status read " - "buffer shortage\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_reopen(adapter, 0, 103, fsf_req); - } + /* put allocated FSF request into hash table */ + spin_lock(&adapter->req_list_lock); + idx = zfcp_reqlist_hash(req->req_id); + list_add_tail(&req->list, &adapter->req_list[idx]); + spin_unlock(&adapter->req_list_lock); + + req->issued = get_clock(); + if (zfcp_qdio_send(req)) { + /* Queues are down..... */ + del_timer(&req->timer); + spin_lock(&adapter->req_list_lock); + zfcp_reqlist_remove(adapter, req); + spin_unlock(&adapter->req_list_lock); + /* undo changes in request queue made for this request */ + atomic_add(req->sbal_number, &req_q->count); + req_q->first -= req->sbal_number; + req_q->first += QDIO_MAX_BUFFERS_PER_Q; + req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ + zfcp_erp_adapter_reopen(adapter, 0, 116, req); + return -EIO; } - out: - return retval; + + /* Don't increase for unsolicited status */ + if (req->qtcb) + adapter->fsf_req_seq_no++; + + return 0; } -/* - * function: zfcp_fsf_abort_fcp_command - * - * purpose: tells FSF to abort a running SCSI command - * - * returns: address of initiated FSF request - * NULL - request could not be initiated - * - * FIXME(design): should be watched by a timeout !!! - * FIXME(design) shouldn't this be modified to return an int - * also...don't know how though +/** + * zfcp_fsf_status_read - send status read request + * @adapter: pointer to struct zfcp_adapter + * @req_flags: request flags + * Returns: 0 on success, ERROR otherwise */ -struct zfcp_fsf_req * -zfcp_fsf_abort_fcp_command(unsigned long old_req_id, - struct zfcp_adapter *adapter, - struct zfcp_unit *unit, int req_flags) +int zfcp_fsf_status_read(struct zfcp_adapter *adapter) { + struct zfcp_fsf_req *req; + struct fsf_status_read_buffer *sr_buf; volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req = NULL; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, - req_flags, adapter->pool.fsf_req_abort, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Failed to create an abort command " - "request for lun 0x%016Lx on port 0x%016Lx " - "on adapter %s.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - goto out; - } - - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status))) - goto unit_blocked; + int retval = -EIO; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; - fsf_req->data = (unsigned long) unit; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, + ZFCP_REQ_NO_QTCB, + adapter->pool.fsf_req_status_read); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; + } - /* set handles of unit and its parent port in QTCB */ - fsf_req->qtcb->header.lun_handle = unit->handle; - fsf_req->qtcb->header.port_handle = unit->port->handle; + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; + sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; + req->sbale_curr = 2; - /* set handle of request which should be aborted */ - fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; + sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); + if (!sr_buf) { + retval = -ENOMEM; + goto failed_buf; + } + memset(sr_buf, 0, sizeof(*sr_buf)); + req->data = sr_buf; + sbale = zfcp_qdio_sbale_curr(req); + sbale->addr = (void *) sr_buf; + sbale->length = sizeof(*sr_buf); - zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - if (!retval) - goto out; + retval = zfcp_fsf_req_send(req); + if (retval) + goto failed_req_send; - unit_blocked: - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; + goto out; - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - return fsf_req; +failed_req_send: + mempool_free(sr_buf, adapter->pool.data_status_read); +failed_buf: + zfcp_fsf_req_free(req); + zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); +out: + spin_unlock(&adapter->req_q.lock); + return retval; } -/* - * function: zfcp_fsf_abort_fcp_command_handler - * - * purpose: is called for finished Abort FCP Command request - * - * returns: - */ -static int -zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) +static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_unit *unit; - union fsf_status_qual *fsf_stat_qual = - &new_fsf_req->qtcb->header.fsf_status_qual; - - if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ - goto skip_fsfstatus; - } - - unit = (struct zfcp_unit *) new_fsf_req->data; + struct zfcp_unit *unit = req->data; + union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual; - /* evaluate FSF status in QTCB */ - switch (new_fsf_req->qtcb->header.fsf_status) { + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) + return; + switch (req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { - /* - * In this case a command that was sent prior to a port - * reopen was aborted (handles are different). This is - * fine. - */ - } else { - ZFCP_LOG_INFO("Temporary port identifier 0x%x for " - "port 0x%016Lx on adapter %s invalid. " - "This may happen occasionally.\n", - unit->port->handle, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_INFO("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char *) &new_fsf_req->qtcb->header. - fsf_status_qual, - sizeof (union fsf_status_qual)); - /* Let's hope this sorts out the mess */ + if (fsq->word[0] == fsq->word[1]) { zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104, - new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } break; - case FSF_LUN_HANDLE_NOT_VALID: - if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { - /* - * In this case a command that was sent prior to a unit - * reopen was aborted (handles are different). - * This is fine. - */ - } else { - ZFCP_LOG_INFO - ("Warning: Temporary LUN identifier 0x%x of LUN " - "0x%016Lx on port 0x%016Lx on adapter %s is " - "invalid. This may happen in rare cases. " - "Trying to re-establish link.\n", - unit->handle, - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("Status qualifier data:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &new_fsf_req->qtcb->header. - fsf_status_qual, - sizeof (union fsf_status_qual)); - /* Let's hope this sorts out the mess */ - zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + if (fsq->word[0] == fsq->word[1]) { + zfcp_erp_port_reopen(unit->port, 0, 105, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; } break; - case FSF_FCP_COMMAND_DOES_NOT_EXIST: - retval = 0; - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; + req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; break; - case FSF_PORT_BOXED: - ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " - "be reopened\n", unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 47, new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(unit->port, 47, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_LUN_BOXED: - ZFCP_LOG_INFO( - "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " - "to be reopened\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_unit_boxed(unit, 48, new_fsf_req); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_unit_boxed(unit, 48, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_ADAPTER_STATUS_AVAILABLE: - switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { + switch (fsq->word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: zfcp_test_link(unit->port); - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* SCSI stack will escalate */ - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - new_fsf_req->qtcb->header.fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - retval = 0; - new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - new_fsf_req->qtcb->header.fsf_status); + req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; break; } - skip_fsfstatus: - return retval; } /** - * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into - * one SBALE - * Two scatter-gather lists are passed, one for the reqeust and one for the - * response. + * zfcp_fsf_abort_fcp_command - abort running SCSI command + * @old_req_id: unsigned long + * @adapter: pointer to struct zfcp_adapter + * @unit: pointer to struct zfcp_unit + * @req_flags: integer specifying the request flags + * Returns: pointer to struct zfcp_fsf_req + * + * FIXME(design): should be watched by a timeout !!! */ -static inline int -zfcp_use_one_sbal(struct scatterlist *req, int req_count, - struct scatterlist *resp, int resp_count) -{ - return ((req_count == 1) && - (resp_count == 1) && - (((unsigned long) zfcp_sg_to_address(&req[0]) & - PAGE_MASK) == - ((unsigned long) (zfcp_sg_to_address(&req[0]) + - req[0].length - 1) & PAGE_MASK)) && - (((unsigned long) zfcp_sg_to_address(&resp[0]) & - PAGE_MASK) == - ((unsigned long) (zfcp_sg_to_address(&resp[0]) + - resp[0].length - 1) & PAGE_MASK))); -} -/** - * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) - * @ct: pointer to struct zfcp_send_ct which conatins all needed data for - * the request - * @pool: pointer to memory pool, if non-null this pool is used to allocate - * a struct zfcp_fsf_req - * @erp_action: pointer to erp_action, if non-null the Generic Service request - * is sent within error recovery - */ -int -zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, - struct zfcp_erp_action *erp_action) +struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, + struct zfcp_adapter *adapter, + struct zfcp_unit *unit, + int req_flags) { volatile struct qdio_buffer_element *sbale; - struct zfcp_port *port; - struct zfcp_adapter *adapter; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int bytes; - int ret = 0; - - port = ct->port; - adapter = port->adapter; - - ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - pool, &lock_flags, &fsf_req); - if (ret < 0) { - ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " - "adapter: %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_req; - } + struct zfcp_fsf_req *req = NULL; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - if (zfcp_use_one_sbal(ct->req, ct->req_count, - ct->resp, ct->resp_count)){ - /* both request buffer and response buffer - fit into one sbale each */ - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; - sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); - sbale[2].length = ct->req[0].length; - sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); - sbale[3].length = ct->resp[0].length; - sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; - } else if (adapter->adapter_features & - FSF_FEATURE_ELS_CT_CHAINED_SBALS) { - /* try to use chained SBALs */ - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - ct->req, ct->req_count, - ZFCP_MAX_SBALS_PER_CT_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of CT request failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - if (bytes == 0) - ret = -ENOMEM; - else - ret = bytes; - - goto failed_send; - } - fsf_req->qtcb->bottom.support.req_buf_length = bytes; - fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - ct->resp, ct->resp_count, - ZFCP_MAX_SBALS_PER_CT_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of CT request failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - if (bytes == 0) - ret = -ENOMEM; - else - ret = bytes; - - goto failed_send; - } - fsf_req->qtcb->bottom.support.resp_buf_length = bytes; - } else { - /* reject send generic request */ - ZFCP_LOG_INFO( - "error: microcode does not support chained SBALs," - "CT request too big (adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - ret = -EOPNOTSUPP; - goto failed_send; - } - - /* settings in QTCB */ - fsf_req->qtcb->header.port_handle = port->handle; - fsf_req->qtcb->bottom.support.service_class = - ZFCP_FC_SERVICE_CLASS_DEFAULT; - fsf_req->qtcb->bottom.support.timeout = ct->timeout; - fsf_req->data = (unsigned long) ct; - - zfcp_san_dbf_event_ct_request(fsf_req); + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, + req_flags, adapter->pool.fsf_req_abort); + if (unlikely(IS_ERR(req))) + goto out; - if (erp_action) { - erp_action->fsf_req = fsf_req; - fsf_req->erp_action = erp_action; - zfcp_erp_start_timer(fsf_req); - } else - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); + if (unlikely(!(atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + goto out_error_free; - ret = zfcp_fsf_req_send(fsf_req); - if (ret) { - ZFCP_LOG_DEBUG("error: initiation of CT request failed " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), port->wwpn); - goto failed_send; - } + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), port->wwpn); - goto out; + req->data = unit; + req->handler = zfcp_fsf_abort_fcp_command_handler; + req->qtcb->header.lun_handle = unit->handle; + req->qtcb->header.port_handle = unit->port->handle; + req->qtcb->bottom.support.req_handle = (u64) old_req_id; - failed_send: - zfcp_fsf_req_free(fsf_req); - if (erp_action != NULL) { - erp_action->fsf_req = NULL; - } - failed_req: - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return ret; + zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); + if (!zfcp_fsf_req_send(req)) + goto out; + +out_error_free: + zfcp_fsf_req_free(req); + req = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return req; } -/** - * zfcp_fsf_send_ct_handler - handler for Generic Service requests - * @fsf_req: pointer to struct zfcp_fsf_req - * - * Data specific for the Generic Service request is passed using - * fsf_req->data. There we find the pointer to struct zfcp_send_ct. - * Usually a specific handler for the CT request is called which is - * found in this structure. - */ -static int -zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req) { - struct zfcp_port *port; - struct zfcp_adapter *adapter; - struct zfcp_send_ct *send_ct; - struct fsf_qtcb_header *header; - struct fsf_qtcb_bottom_support *bottom; - int retval = -EINVAL; - u16 subtable, rule, counter; + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_send_ct *send_ct = req->data; + struct zfcp_port *port = send_ct->port; + struct fsf_qtcb_header *header = &req->qtcb->header; - adapter = fsf_req->adapter; - send_ct = (struct zfcp_send_ct *) fsf_req->data; - port = send_ct->port; - header = &fsf_req->qtcb->header; - bottom = &fsf_req->qtcb->bottom.support; + send_ct->status = -EINVAL; - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { - case FSF_GOOD: - zfcp_san_dbf_event_ct_response(fsf_req); - retval = 0; + zfcp_san_dbf_event_ct_response(req); + send_ct->status = 0; break; - case FSF_SERVICE_CLASS_NOT_SUPPORTED: - ZFCP_LOG_INFO("error: adapter %s does not support fc " - "class %d.\n", - zfcp_get_busid_by_port(port), - ZFCP_FC_SERVICE_CLASS_DEFAULT); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(adapter, 0, 123, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_class_not_supp(req); break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]){ case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* reopening link to port */ zfcp_test_link(port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " - "arrived.\n", - header->fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("access denied, cannot send generic service " - "command (adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_port_access_denied(port, 55, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_GENERIC_COMMAND_REJECTED: - ZFCP_LOG_INFO("generic service command rejected " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - ZFCP_LOG_INFO("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid. This may " - "happen occasionally.\n", port->handle, - port->wwpn, zfcp_get_busid_by_port(port)); - ZFCP_LOG_INFO("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - case FSF_PORT_BOXED: - ZFCP_LOG_INFO("port needs to be reopened " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_port(port), port->d_id); - zfcp_erp_port_boxed(port, 49, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(port, 49, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - - /* following states should never occure, all cases avoided - in zfcp_fsf_send_ct - but who knows ... */ + case FSF_PORT_HANDLE_NOT_VALID: + zfcp_erp_adapter_reopen(adapter, 0, 106, req); + case FSF_GENERIC_COMMAND_REJECTED: case FSF_PAYLOAD_SIZE_MISMATCH: - ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " - "req_buf_length=%d, resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_REQUEST_SIZE_TOO_LARGE: - ZFCP_LOG_INFO("request size too large (adapter: %s, " - "req_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_RESPONSE_SIZE_TOO_LARGE: - ZFCP_LOG_INFO("response size too large (adapter: %s, " - "resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SBAL_MISMATCH: - ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " - "resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", header->fsf_status); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } skip_fsfstatus: - send_ct->status = retval; - - if (send_ct->handler != NULL) + if (send_ct->handler) send_ct->handler(send_ct->handler_data); +} - return retval; +static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req, + struct scatterlist *sg_req, + struct scatterlist *sg_resp, int max_sbals) +{ + int bytes; + + bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, + sg_req, max_sbals); + if (bytes <= 0) + return -ENOMEM; + req->qtcb->bottom.support.req_buf_length = bytes; + req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; + + bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, + sg_resp, max_sbals); + if (bytes <= 0) + return -ENOMEM; + req->qtcb->bottom.support.resp_buf_length = bytes; + + return 0; } /** - * zfcp_fsf_send_els - initiate an ELS command (FC-FS) - * @els: pointer to struct zfcp_send_els which contains all needed data for - * the command. + * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) + * @ct: pointer to struct zfcp_send_ct with data for request + * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req + * @erp_action: if non-null the Generic Service request sent within ERP */ -int -zfcp_fsf_send_els(struct zfcp_send_els *els) +int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, + struct zfcp_erp_action *erp_action) { - volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - u32 d_id; - struct zfcp_adapter *adapter; - unsigned long lock_flags; - int bytes; - int ret = 0; - - d_id = els->d_id; - adapter = els->adapter; + struct zfcp_port *port = ct->port; + struct zfcp_adapter *adapter = port->adapter; + struct zfcp_fsf_req *req; + int ret = -EIO; - ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, - ZFCP_REQ_AUTO_CLEANUP, - NULL, &lock_flags, &fsf_req); - if (ret < 0) { - ZFCP_LOG_INFO("error: creation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - goto failed_req; - } + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &els->port->status))) { - ret = -EBUSY; - goto port_blocked; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, + ZFCP_REQ_AUTO_CLEANUP, pool); + if (unlikely(IS_ERR(req))) { + ret = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - if (zfcp_use_one_sbal(els->req, els->req_count, - els->resp, els->resp_count)){ - /* both request buffer and response buffer - fit into one sbale each */ - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; - sbale[2].addr = zfcp_sg_to_address(&els->req[0]); - sbale[2].length = els->req[0].length; - sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); - sbale[3].length = els->resp[0].length; - sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; - } else if (adapter->adapter_features & - FSF_FEATURE_ELS_CT_CHAINED_SBALS) { - /* try to use chained SBALs */ - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - els->req, els->req_count, - ZFCP_MAX_SBALS_PER_ELS_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - if (bytes == 0) { - ret = -ENOMEM; - } else { - ret = bytes; - } - goto failed_send; - } - fsf_req->qtcb->bottom.support.req_buf_length = bytes; - fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; - bytes = zfcp_qdio_sbals_from_sg(fsf_req, - SBAL_FLAGS0_TYPE_WRITE_READ, - els->resp, els->resp_count, - ZFCP_MAX_SBALS_PER_ELS_REQ); - if (bytes <= 0) { - ZFCP_LOG_INFO("error: creation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - if (bytes == 0) { - ret = -ENOMEM; - } else { - ret = bytes; - } - goto failed_send; - } - fsf_req->qtcb->bottom.support.resp_buf_length = bytes; - } else { - /* reject request */ - ZFCP_LOG_INFO("error: microcode does not support chained SBALs" - ", ELS request too big (adapter %s, " - "port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - ret = -EOPNOTSUPP; - goto failed_send; - } - - /* settings in QTCB */ - fsf_req->qtcb->bottom.support.d_id = d_id; - fsf_req->qtcb->bottom.support.service_class = - ZFCP_FC_SERVICE_CLASS_DEFAULT; - fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; - fsf_req->data = (unsigned long) els; - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - - zfcp_san_dbf_event_els_request(fsf_req); - - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - ret = zfcp_fsf_req_send(fsf_req); - if (ret) { - ZFCP_LOG_DEBUG("error: initiation of ELS request failed " - "(adapter %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); + ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp, + FSF_MAX_SBALS_PER_REQ); + if (ret) goto failed_send; - } - ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " - "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id); - goto out; + req->handler = zfcp_fsf_send_ct_handler; + req->qtcb->header.port_handle = port->handle; + req->qtcb->bottom.support.service_class = FSF_CLASS_3; + req->qtcb->bottom.support.timeout = ct->timeout; + req->data = ct; - port_blocked: - failed_send: - zfcp_fsf_req_free(fsf_req); + zfcp_san_dbf_event_ct_request(req); - failed_req: - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + if (erp_action) { + erp_action->fsf_req = req; + req->erp_action = erp_action; + zfcp_fsf_start_erp_timer(req); + } else + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + + ret = zfcp_fsf_req_send(req); + if (ret) + goto failed_send; + + goto out; - return ret; +failed_send: + zfcp_fsf_req_free(req); + if (erp_action) + erp_action->fsf_req = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return ret; } -/** - * zfcp_fsf_send_els_handler - handler for ELS commands - * @fsf_req: pointer to struct zfcp_fsf_req - * - * Data specific for the ELS command is passed using - * fsf_req->data. There we find the pointer to struct zfcp_send_els. - * Usually a specific handler for the ELS command is called which is - * found in this structure. - */ -static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req) { - struct zfcp_adapter *adapter; - struct zfcp_port *port; - u32 d_id; - struct fsf_qtcb_header *header; - struct fsf_qtcb_bottom_support *bottom; - struct zfcp_send_els *send_els; - int retval = -EINVAL; - u16 subtable, rule, counter; - - send_els = (struct zfcp_send_els *) fsf_req->data; - adapter = send_els->adapter; - port = send_els->port; - d_id = send_els->d_id; - header = &fsf_req->qtcb->header; - bottom = &fsf_req->qtcb->bottom.support; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) + struct zfcp_send_els *send_els = req->data; + struct zfcp_port *port = send_els->port; + struct fsf_qtcb_header *header = &req->qtcb->header; + + send_els->status = -EINVAL; + + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; switch (header->fsf_status) { - case FSF_GOOD: - zfcp_san_dbf_event_els_response(fsf_req); - retval = 0; + zfcp_san_dbf_event_els_response(req); + send_els->status = 0; break; - case FSF_SERVICE_CLASS_NOT_SUPPORTED: - ZFCP_LOG_INFO("error: adapter %s does not support fc " - "class %d.\n", - zfcp_get_busid_by_adapter(adapter), - ZFCP_FC_SERVICE_CLASS_DEFAULT); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(adapter, 0, 124, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_class_not_supp(req); break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]){ case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: if (port && (send_els->ls_code != ZFCP_LS_ADISC)) zfcp_test_link(port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /*fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = - zfcp_handle_els_rjt(header->fsf_status_qual.word[1], - (struct zfcp_ls_rjt_par *) - &header->fsf_status_qual.word[2]); - break; case FSF_SQ_RETRY_IF_POSSIBLE: - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - default: - ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", - header->fsf_status_qual.word[0]); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, - (char*)header->fsf_status_qual.word, 16); } break; - case FSF_ELS_COMMAND_REJECTED: - ZFCP_LOG_INFO("ELS has been rejected because command filter " - "prohibited sending " - "(adapter: %s, port d_id: 0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - - break; - case FSF_PAYLOAD_SIZE_MISMATCH: - ZFCP_LOG_INFO( - "ELS request size and ELS response size must be either " - "both 0, or both greater than 0 " - "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, - bottom->resp_buf_length); - break; - case FSF_REQUEST_SIZE_TOO_LARGE: - ZFCP_LOG_INFO( - "Length of the ELS request buffer, " - "specified in QTCB bottom, " - "exceeds the size of the buffers " - "that have been allocated for ELS request data " - "(adapter: %s, req_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length); - break; - case FSF_RESPONSE_SIZE_TOO_LARGE: - ZFCP_LOG_INFO( - "Length of the ELS response buffer, " - "specified in QTCB bottom, " - "exceeds the size of the buffers " - "that have been allocated for ELS response data " - "(adapter: %s, resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->resp_buf_length); - break; - - case FSF_SBAL_MISMATCH: - /* should never occure, avoided in zfcp_fsf_send_els */ - ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " - "resp_buf_length=%d)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->req_buf_length, bottom->resp_buf_length); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("access denied, cannot send ELS command " - "(adapter %s, port d_id=0x%06x)\n", - zfcp_get_busid_by_adapter(adapter), d_id); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - if (port != NULL) - zfcp_erp_port_access_denied(port, 56, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - + case FSF_SBAL_MISMATCH: + /* should never occure, avoided in zfcp_fsf_send_els */ + /* fall through */ default: - ZFCP_LOG_NORMAL( - "bug: An unknown FSF Status was presented " - "(adapter: %s, fsf_status=0x%08x)\n", - zfcp_get_busid_by_adapter(adapter), - header->fsf_status); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } - skip_fsfstatus: - send_els->status = retval; - if (send_els->handler) send_els->handler(send_els->handler_data); +} - return retval; +/** + * zfcp_fsf_send_els - initiate an ELS command (FC-FS) + * @els: pointer to struct zfcp_send_els with data for the command + */ +int zfcp_fsf_send_els(struct zfcp_send_els *els) +{ + struct zfcp_fsf_req *req; + struct zfcp_adapter *adapter = els->adapter; + struct fsf_qtcb_bottom_support *bottom; + int ret = -EIO; + + if (unlikely(!(atomic_read(&els->port->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + return -EBUSY; + + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, + ZFCP_REQ_AUTO_CLEANUP, NULL); + if (unlikely(IS_ERR(req))) { + ret = PTR_ERR(req); + goto out; + } + + ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, + FSF_MAX_SBALS_PER_ELS_REQ); + if (ret) + goto failed_send; + + bottom = &req->qtcb->bottom.support; + req->handler = zfcp_fsf_send_els_handler; + bottom->d_id = els->d_id; + bottom->service_class = FSF_CLASS_3; + bottom->timeout = 2 * R_A_TOV; + req->data = els; + + zfcp_san_dbf_event_els_request(req); + + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + ret = zfcp_fsf_req_send(req); + if (ret) + goto failed_send; + + goto out; + +failed_send: + zfcp_fsf_req_free(req); +out: + spin_unlock(&adapter->req_q.lock); + return ret; } -int -zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) +int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; + struct zfcp_fsf_req *req; struct zfcp_adapter *adapter = erp_action->adapter; - unsigned long lock_flags; - int retval; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, - FSF_QTCB_EXCHANGE_CONFIG_DATA, - ZFCP_REQ_AUTO_CLEANUP, - adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not create exchange configuration " - "data request for adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, + FSF_QTCB_EXCHANGE_CONFIG_DATA, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->qtcb->bottom.config.feature_selection = + req->qtcb->bottom.config.feature_selection = FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING | FSF_FEATURE_NOTIFICATION_LOST | FSF_FEATURE_UPDATE_ALERT; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; + req->erp_action = erp_action; + req->handler = zfcp_fsf_exchange_config_data_handler; + erp_action->fsf_req = req; - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send exchange configuration " - "data command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; } - else - ZFCP_LOG_DEBUG("exchange configuration data request initiated " - "(adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - +out: + spin_unlock(&adapter->req_q.lock); return retval; } -int -zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, - struct fsf_qtcb_bottom_config *data) +int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, + struct fsf_qtcb_bottom_config *data) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, - ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags, - &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not create exchange configuration " - "data request for adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + struct zfcp_fsf_req *req = NULL; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, + 0, NULL); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + req->handler = zfcp_fsf_exchange_config_data_handler; - fsf_req->qtcb->bottom.config.feature_selection = + req->qtcb->bottom.config.feature_selection = FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING | FSF_FEATURE_NOTIFICATION_LOST | FSF_FEATURE_UPDATE_ALERT; if (data) - fsf_req->data = (unsigned long) data; + req->data = data; - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - if (retval) - ZFCP_LOG_INFO("error: Could not send exchange configuration " - "data command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - else - wait_event(fsf_req->completion_wq, - fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + retval = zfcp_fsf_req_send(req); +out: + spin_unlock(&adapter->req_q.lock); + if (!retval) + wait_event(req->completion_wq, + req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); return retval; } /** - * zfcp_fsf_exchange_config_evaluate - * @fsf_req: fsf_req which belongs to xchg config data request - * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) - * - * returns: -EIO on error, 0 otherwise - */ -static int -zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) -{ - struct fsf_qtcb_bottom_config *bottom; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct Scsi_Host *shost = adapter->scsi_host; - - bottom = &fsf_req->qtcb->bottom.config; - ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", - bottom->low_qtcb_version, bottom->high_qtcb_version); - adapter->fsf_lic_version = bottom->lic_version; - adapter->adapter_features = bottom->adapter_features; - adapter->connection_features = bottom->connection_features; - adapter->peer_wwpn = 0; - adapter->peer_wwnn = 0; - adapter->peer_d_id = 0; - - if (xchg_ok) { - - if (fsf_req->data) - memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data, - bottom, sizeof (struct fsf_qtcb_bottom_config)); - - fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; - fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; - fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; - fc_host_speed(shost) = bottom->fc_link_speed; - fc_host_supported_classes(shost) = - FC_COS_CLASS2 | FC_COS_CLASS3; - adapter->hydra_version = bottom->adapter_type; - if (fc_host_permanent_port_name(shost) == -1) - fc_host_permanent_port_name(shost) = - fc_host_port_name(shost); - if (bottom->fc_topology == FSF_TOPO_P2P) { - adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; - adapter->peer_wwpn = bottom->plogi_payload.wwpn; - adapter->peer_wwnn = bottom->plogi_payload.wwnn; - fc_host_port_type(shost) = FC_PORTTYPE_PTP; - } else if (bottom->fc_topology == FSF_TOPO_FABRIC) - fc_host_port_type(shost) = FC_PORTTYPE_NPORT; - else if (bottom->fc_topology == FSF_TOPO_AL) - fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; - else - fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; - } else { - fc_host_node_name(shost) = 0; - fc_host_port_name(shost) = 0; - fc_host_port_id(shost) = 0; - fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; - fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; - adapter->hydra_version = 0; - } - - if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { - adapter->hardware_version = bottom->hardware_version; - memcpy(fc_host_serial_number(shost), bottom->serial_number, - min(FC_SERIAL_NUMBER_SIZE, 17)); - EBCASC(fc_host_serial_number(shost), - min(FC_SERIAL_NUMBER_SIZE, 17)); - } - - if (fsf_req->erp_action) - ZFCP_LOG_NORMAL("The adapter %s reported the following " - "characteristics:\n" - "WWNN 0x%016Lx, WWPN 0x%016Lx, " - "S_ID 0x%06x,\n" - "adapter version 0x%x, " - "LIC version 0x%x, " - "FC link speed %d Gb/s\n", - zfcp_get_busid_by_adapter(adapter), - (wwn_t) fc_host_node_name(shost), - (wwn_t) fc_host_port_name(shost), - fc_host_port_id(shost), - adapter->hydra_version, - adapter->fsf_lic_version, - fc_host_speed(shost)); - if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { - ZFCP_LOG_NORMAL("error: the adapter %s " - "only supports newer control block " - "versions in comparison to this device " - "driver (try updated device driver)\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req); - return -EIO; - } - if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { - ZFCP_LOG_NORMAL("error: the adapter %s " - "only supports older control block " - "versions than this device driver uses" - "(consider a microcode upgrade)\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req); - return -EIO; - } - return 0; -} - -/** - * function: zfcp_fsf_exchange_config_data_handler - * - * purpose: is called for finished Exchange Configuration Data command - * - * returns: - */ -static int -zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) -{ - struct fsf_qtcb_bottom_config *bottom; - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_qtcb *qtcb = fsf_req->qtcb; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) - return -EIO; - - switch (qtcb->header.fsf_status) { - - case FSF_GOOD: - if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) - return -EIO; - - switch (fc_host_port_type(adapter->scsi_host)) { - case FC_PORTTYPE_PTP: - ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " - "configuration detected at adapter %s\n" - "Peer WWNN 0x%016llx, " - "peer WWPN 0x%016llx, " - "peer d_id 0x%06x\n", - zfcp_get_busid_by_adapter(adapter), - adapter->peer_wwnn, - adapter->peer_wwpn, - adapter->peer_d_id); - break; - case FC_PORTTYPE_NLPORT: - ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " - "topology detected at adapter %s " - "unsupported, shutting down adapter\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req); - return -EIO; - case FC_PORTTYPE_NPORT: - if (fsf_req->erp_action) - ZFCP_LOG_NORMAL("Switched fabric fibrechannel " - "network detected at adapter " - "%s.\n", - zfcp_get_busid_by_adapter(adapter)); - break; - default: - ZFCP_LOG_NORMAL("bug: The fibrechannel topology " - "reported by the exchange " - "configuration command for " - "the adapter %s is not " - "of a type known to the zfcp " - "driver, shutting down adapter\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req); - return -EIO; - } - bottom = &qtcb->bottom.config; - if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { - ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " - "allowed by the adapter %s " - "is lower than the minimum " - "required by the driver (%ld bytes).\n", - bottom->max_qtcb_size, - zfcp_get_busid_by_adapter(adapter), - sizeof(struct fsf_qtcb)); - zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req); - return -EIO; - } - atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, - &adapter->status); - break; - case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: - if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) - return -EIO; - - atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, - &adapter->status); - - zfcp_fsf_link_down_info_eval(fsf_req, 42, - &qtcb->header.fsf_status_qual.link_down_info); - break; - default: - zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req); - return -EIO; - } - return 0; -} - -/** * zfcp_fsf_exchange_port_data - request information about local port * @erp_action: ERP action for the adapter for which port data is requested + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) +int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; + struct zfcp_fsf_req *req; struct zfcp_adapter *adapter = erp_action->adapter; - unsigned long lock_flags; - int retval; + int retval = -EIO; - if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { - ZFCP_LOG_INFO("error: exchange port data " - "command not supported by adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) return -EOPNOTSUPP; - } - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, - ZFCP_REQ_AUTO_CLEANUP, - adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Out of resources. Could not create an " - "exchange port data request for " - "the adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - erp_action->fsf_req = fsf_req; - fsf_req->erp_action = erp_action; - zfcp_erp_start_timer(fsf_req); - - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + req->handler = zfcp_fsf_exchange_port_data_handler; + req->erp_action = erp_action; + erp_action->fsf_req = req; + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send an exchange port data " - "command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; } - else - ZFCP_LOG_DEBUG("exchange port data request initiated " - "(adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); +out: + spin_unlock(&adapter->req_q.lock); return retval; } - /** * zfcp_fsf_exchange_port_data_sync - request information about local port - * and wait until information is ready + * @adapter: pointer to struct zfcp_adapter + * @data: pointer to struct fsf_qtcb_bottom_port + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, - struct fsf_qtcb_bottom_port *data) +int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, + struct fsf_qtcb_bottom_port *data) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval; - - if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { - ZFCP_LOG_INFO("error: exchange port data " - "command not supported by adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); + struct zfcp_fsf_req *req = NULL; + int retval = -EIO; + + if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) return -EOPNOTSUPP; - } - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, - 0, NULL, &lock_flags, &fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Out of resources. Could not create an " - "exchange port data request for " - "the adapter %s.\n", - zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); - return retval; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0, + NULL); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } if (data) - fsf_req->data = (unsigned long) data; + req->data = data; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - - if (retval) - ZFCP_LOG_INFO("error: Could not send an exchange port data " - "command on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - else - wait_event(fsf_req->completion_wq, - fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - - zfcp_fsf_req_free(fsf_req); - - return retval; -} - -/** - * zfcp_fsf_exchange_port_evaluate - * @fsf_req: fsf_req which belongs to xchg port data request - * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) - */ -static void -zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) -{ - struct zfcp_adapter *adapter; - struct fsf_qtcb_bottom_port *bottom; - struct Scsi_Host *shost; - - adapter = fsf_req->adapter; - bottom = &fsf_req->qtcb->bottom.port; - shost = adapter->scsi_host; - - if (fsf_req->data) - memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom, - sizeof(struct fsf_qtcb_bottom_port)); - - if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) - fc_host_permanent_port_name(shost) = bottom->wwpn; - else - fc_host_permanent_port_name(shost) = fc_host_port_name(shost); - fc_host_maxframe_size(shost) = bottom->maximum_frame_size; - fc_host_supported_speeds(shost) = bottom->supported_speed; -} - -/** - * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request - * @fsf_req: pointer to struct zfcp_fsf_req - */ -static void -zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) -{ - struct zfcp_adapter *adapter; - struct fsf_qtcb *qtcb; - - adapter = fsf_req->adapter; - qtcb = fsf_req->qtcb; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) - return; - - switch (qtcb->header.fsf_status) { - case FSF_GOOD: - zfcp_fsf_exchange_port_evaluate(fsf_req, 1); - atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - break; - case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: - zfcp_fsf_exchange_port_evaluate(fsf_req, 0); - atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); - zfcp_fsf_link_down_info_eval(fsf_req, 43, - &qtcb->header.fsf_status_qual.link_down_info); - break; - } -} - - -/* - * function: zfcp_fsf_open_port - * - * purpose: - * - * returns: address of initiated FSF request - * NULL - request could not be initiated - */ -int -zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) -{ - volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_OPEN_PORT_WITH_DID, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create open port request " - "for port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - goto out; - } - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - - fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; - atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); - fsf_req->data = (unsigned long) erp_action->port; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; - - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not send open port request for " - "port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - zfcp_fsf_req_free(fsf_req); - erp_action->fsf_req = NULL; - goto out; - } + req->handler = zfcp_fsf_exchange_port_data_handler; + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + retval = zfcp_fsf_req_send(req); +out: + spin_unlock(&adapter->req_q.lock); + if (!retval) + wait_event(req->completion_wq, + req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + zfcp_fsf_req_free(req); - ZFCP_LOG_DEBUG("open port request initiated " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); return retval; } -/* - * function: zfcp_fsf_open_port_handler - * - * purpose: is called for finished Open Port command - * - * returns: - */ -static int -zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_port *port; + struct zfcp_port *port = req->data; + struct fsf_qtcb_header *header = &req->qtcb->header; struct fsf_plogi *plogi; - struct fsf_qtcb_header *header; - u16 subtable, rule, counter; - port = (struct zfcp_port *) fsf_req->data; - header = &fsf_req->qtcb->header; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change port status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { - case FSF_PORT_ALREADY_OPEN: - ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " - "is already open.\n", - port->wwpn, zfcp_get_busid_by_port(port)); - /* - * This is a bug, however operation should continue normally - * if it is simply ignored - */ break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " - "on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_port_access_denied(port, 57, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: - ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " - "The remote port 0x%016Lx on adapter %s " - "could not be opened. Disabling it.\n", - port->wwpn, zfcp_get_busid_by_port(port)); - zfcp_erp_port_failed(port, 31, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + dev_warn(&req->adapter->ccw_device->dev, + "The adapter is out of resources. The remote port " + "0x%016Lx could not be opened, disabling it.\n", + port->wwpn); + zfcp_erp_port_failed(port, 31, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_NO_RETRY_POSSIBLE: - ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " - "adapter %s could not be opened. " - "Disabling it.\n", - port->wwpn, - zfcp_get_busid_by_port(port)); - zfcp_erp_port_failed(port, 32, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); + dev_warn(&req->adapter->ccw_device->dev, + "The remote port 0x%016Lx could not be " + "opened. Disabling it.\n", port->wwpn); + zfcp_erp_port_failed(port, 32, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - /* save port handle assigned by FSF */ port->handle = header->port_handle; - ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " - "was opened, it's port handle is 0x%x\n", - port->wwpn, zfcp_get_busid_by_port(port), - port->handle); - /* mark port as open */ atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | ZFCP_STATUS_COMMON_ACCESS_BOXED, &port->status); - retval = 0; /* check whether D_ID has changed during open */ /* * FIXME: This check is not airtight, as the FCP channel does @@ -2526,320 +1496,168 @@ zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) * another GID_PN straight after a port has been opened. * Alternately, an ADISC/PDISC ELS should suffice, as well. */ - plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; - if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) - { - if (fsf_req->qtcb->bottom.support.els1_length < - sizeof (struct fsf_plogi)) { - ZFCP_LOG_INFO( - "warning: insufficient length of " - "PLOGI payload (%i)\n", - fsf_req->qtcb->bottom.support.els1_length); - /* skip sanity check and assume wwpn is ok */ - } else { - if (plogi->serv_param.wwpn != port->wwpn) { - ZFCP_LOG_INFO("warning: d_id of port " - "0x%016Lx changed during " - "open\n", port->wwpn); - atomic_clear_mask( - ZFCP_STATUS_PORT_DID_DID, - &port->status); - } else { - port->wwnn = plogi->serv_param.wwnn; - zfcp_plogi_evaluate(port, plogi); - } + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) + break; + + plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els; + if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) { + if (plogi->serv_param.wwpn != port->wwpn) + atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID, + &port->status); + else { + port->wwnn = plogi->serv_param.wwnn; + zfcp_fc_plogi_evaluate(port, plogi); } } break; - case FSF_UNKNOWN_OP_SUBTYPE: - /* should never occure, subtype not set in zfcp_fsf_open_port */ - ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " - "op_subtype=0x%x)\n", - zfcp_get_busid_by_port(port), - fsf_req->qtcb->bottom.support.operation_subtype); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - header->fsf_status); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); - return retval; } -/* - * function: zfcp_fsf_close_port - * - * purpose: submit FSF command "close port" - * - * returns: address of initiated FSF request - * NULL - request could not be initiated +/** + * zfcp_fsf_open_port - create and send open port request + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) +int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_CLOSE_PORT, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create a close port request " - "for port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, + FSF_QTCB_OPEN_PORT_WITH_DID, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); - fsf_req->data = (unsigned long) erp_action->port; - fsf_req->erp_action = erp_action; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; - - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); + req->handler = zfcp_fsf_open_port_handler; + req->qtcb->bottom.support.d_id = erp_action->port->d_id; + req->data = erp_action->port; + req->erp_action = erp_action; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); + + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send a close port request for " - "port 0x%016Lx on adapter %s.\n", - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("close port request initiated " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_close_port_handler - * - * purpose: is called for finished Close Port FSF command - * - * returns: - */ -static int -zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_port *port; + struct zfcp_port *port = req->data; - port = (struct zfcp_port *) fsf_req->data; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change port status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - - /* evaluate FSF status in QTCB */ - switch (fsf_req->qtcb->header.fsf_status) { + switch (req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid. This may happen " - "occasionally.\n", port->handle, - port->wwpn, zfcp_get_busid_by_port(port)); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_adapter_reopen(port->adapter, 0, 107, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ADAPTER_STATUS_AVAILABLE: - /* Note: FSF has actually closed the port in this case. - * The status code is just daft. Fingers crossed for a change - */ - retval = 0; break; - case FSF_GOOD: - ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " - "port handle 0x%x\n", port->wwpn, - zfcp_get_busid_by_port(port), port->handle); - zfcp_erp_modify_port_status(port, 33, fsf_req, + zfcp_erp_modify_port_status(port, 33, req, ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - fsf_req->qtcb->header.fsf_status); break; } - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); - return retval; } -/* - * function: zfcp_fsf_close_physical_port - * - * purpose: submit FSF command "close physical port" - * - * returns: address of initiated FSF request - * NULL - request could not be initiated +/** + * zfcp_fsf_close_port - create and send close port request + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) +int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_CLOSE_PHYSICAL_PORT, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create close physical port " - "request (adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - /* mark port as being closed */ - atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, - &erp_action->port->status); - /* save a pointer to this port */ - fsf_req->data = (unsigned long) erp_action->port; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; - - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(fsf_req); + req->handler = zfcp_fsf_close_port_handler; + req->data = erp_action->port; + req->erp_action = erp_action; + req->qtcb->header.port_handle = erp_action->port->handle; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); + + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send close physical port " - "request (adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("close physical port request initiated " - "(adapter %s, port 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_close_physical_port_handler - * - * purpose: is called for finished Close Physical Port FSF command - * - * returns: - */ -static int -zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_port *port; + struct zfcp_port *port = req->data; + struct fsf_qtcb_header *header = &req->qtcb->header; struct zfcp_unit *unit; - struct fsf_qtcb_header *header; - u16 subtable, rule, counter; - port = (struct zfcp_port *) fsf_req->data; - header = &fsf_req->qtcb->header; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change port status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { - case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" - "(adapter %s, port 0x%016Lx). " - "This may happen occasionally.\n", - port->handle, - zfcp_get_busid_by_port(port), - port->wwpn); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_adapter_reopen(port->adapter, 0, 108, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot close " - "physical port 0x%016Lx on adapter %s\n", - port->wwpn, zfcp_get_busid_by_port(port)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_port_access_denied(port, 58, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_fsf_access_denied_port(req, port); break; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " - "%s needs to be reopened but it was attempted " - "to close it physically.\n", - port->wwpn, - zfcp_get_busid_by_port(port)); - zfcp_erp_port_boxed(port, 50, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; - + zfcp_erp_port_boxed(port, 50, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; /* can't use generic zfcp_erp_modify_port_status because * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); @@ -2847,154 +1665,88 @@ zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* This will now be escalated by ERP */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /* fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " - "physically closed, port handle 0x%x\n", - port->wwpn, - zfcp_get_busid_by_port(port), port->handle); /* can't use generic zfcp_erp_modify_port_status because * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); list_for_each_entry(unit, &port->unit_list_head, list) - atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - header->fsf_status); + atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, + &unit->status); break; } - - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); - return retval; } -/* - * function: zfcp_fsf_open_unit - * - * purpose: - * - * returns: - * - * assumptions: This routine does not check whether the associated - * remote port has already been opened. This should be - * done by calling routines. Otherwise some status - * may be presented by FSF +/** + * zfcp_fsf_close_physical_port - close physical port + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success */ -int -zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) +int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_OPEN_LUN, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create open unit request for " - "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", - erp_action->unit->fcp_lun, - erp_action->unit->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; - if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) - fsf_req->qtcb->bottom.support.option = - FSF_OPEN_LUN_SUPPRESS_BOXING; - atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); - fsf_req->data = (unsigned long) erp_action->unit; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; + req->data = erp_action->port; + req->qtcb->header.port_handle = erp_action->port->handle; + req->erp_action = erp_action; + req->handler = zfcp_fsf_close_physical_port_handler; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, + &erp_action->port->status); - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(erp_action->fsf_req); + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send an open unit request " - "on the adapter %s, port 0x%016Lx for " - "unit 0x%016Lx\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn, - erp_action->unit->fcp_lun); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " - "port 0x%016Lx, unit 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn, erp_action->unit->fcp_lun); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_open_unit_handler - * - * purpose: is called for finished Open LUN command - * - * returns: - */ -static int -zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_adapter *adapter; - struct zfcp_unit *unit; - struct fsf_qtcb_header *header; - struct fsf_qtcb_bottom_support *bottom; - struct fsf_queue_designator *queue_designator; - u16 subtable, rule, counter; + struct zfcp_adapter *adapter = req->adapter; + struct zfcp_unit *unit = req->data; + struct fsf_qtcb_header *header = &req->qtcb->header; + struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support; + struct fsf_queue_designator *queue_designator = + &header->fsf_status_qual.fsf_queue_designator; int exclusive, readwrite; - unit = (struct zfcp_unit *) fsf_req->data; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change unit status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - - adapter = fsf_req->adapter; - header = &fsf_req->qtcb->header; - bottom = &fsf_req->qtcb->bottom.support; - queue_designator = &header->fsf_status_qual.fsf_queue_designator; atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | ZFCP_STATUS_COMMON_ACCESS_BOXED | @@ -3002,155 +1754,65 @@ zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) ZFCP_STATUS_UNIT_READONLY, &unit->status); - /* evaluate FSF status in QTCB */ switch (header->fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x " - "for port 0x%016Lx on adapter %s invalid " - "This may happen occasionally\n", - unit->port->handle, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - + zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req); + /* fall through */ case FSF_LUN_ALREADY_OPEN: - ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " - "remote port 0x%016Lx on adapter %s twice.\n", - unit->fcp_lun, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " - "remote port 0x%016Lx on adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_unit_access_denied(unit, 59, fsf_req); + zfcp_fsf_access_denied_unit(req, unit); atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); - atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); break; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " - "needs to be reopened\n", - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 51, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(unit->port, 51, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_LUN_SHARING_VIOLATION: - if (header->fsf_status_qual.word[0] != 0) { - ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " - "with WWPN 0x%Lx " - "connected to the adapter %s " - "is already in use in LPAR%d, CSS%d\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - queue_designator->hla, - queue_designator->cssid); - } else { - subtable = header->fsf_status_qual.halfword[4]; - rule = header->fsf_status_qual.halfword[5]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " - "remote port with WWPN 0x%Lx " - "connected to the adapter %s " - "is denied (%s rule %d)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - zfcp_act_subtable_type[subtable], - rule); - break; - } - } - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_unit_access_denied(unit, 60, fsf_req); + if (header->fsf_status_qual.word[0]) + dev_warn(&adapter->ccw_device->dev, + "FCP-LUN 0x%Lx at the remote port " + "with WWPN 0x%Lx " + "connected to the adapter " + "is already in use in LPAR%d, CSS%d.\n", + unit->fcp_lun, + unit->port->wwpn, + queue_designator->hla, + queue_designator->cssid); + else + zfcp_act_eval_err(adapter, + header->fsf_status_qual.word[2]); + zfcp_erp_unit_access_denied(unit, 60, req); atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: - ZFCP_LOG_INFO("error: The adapter ran out of resources. " - "There is no handle (temporary port identifier) " - "available for unit 0x%016Lx on port 0x%016Lx " - "on adapter %s\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_unit_failed(unit, 34, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + dev_warn(&adapter->ccw_device->dev, + "The adapter ran out of resources. There is no " + "handle available for unit 0x%016Lx on port 0x%016Lx.", + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_unit_failed(unit, 34, req); + /* fall through */ + case FSF_INVALID_COMMAND_OPTION: + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_ADAPTER_STATUS_AVAILABLE: switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* Re-establish link to port */ zfcp_test_link(unit->port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /* fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); } break; - case FSF_INVALID_COMMAND_OPTION: - ZFCP_LOG_NORMAL( - "Invalid option 0x%x has been specified " - "in QTCB bottom sent to the adapter %s\n", - bottom->option, - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; - break; - case FSF_GOOD: - /* save LUN handle assigned by FSF */ unit->handle = header->lun_handle; - ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " - "adapter %s opened, port handle 0x%x\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - unit->handle); - /* mark unit as open */ atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && @@ -3168,1528 +1830,629 @@ zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) if (!readwrite) { atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); - ZFCP_LOG_NORMAL("read-only access for unit " - "(adapter %s, wwpn=0x%016Lx, " - "fcp_lun=0x%016Lx)\n", - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, - unit->fcp_lun); + dev_info(&adapter->ccw_device->dev, + "Read-only access for unit 0x%016Lx " + "on port 0x%016Lx.\n", + unit->fcp_lun, unit->port->wwpn); } if (exclusive && !readwrite) { - ZFCP_LOG_NORMAL("exclusive access of read-only " - "unit not supported\n"); - zfcp_erp_unit_failed(unit, 35, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req); + dev_err(&adapter->ccw_device->dev, + "Exclusive access of read-only unit " + "0x%016Lx on port 0x%016Lx not " + "supported, disabling unit.\n", + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_unit_failed(unit, 35, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_unit_shutdown(unit, 0, 80, req); } else if (!exclusive && readwrite) { - ZFCP_LOG_NORMAL("shared access of read-write " - "unit not supported\n"); - zfcp_erp_unit_failed(unit, 36, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req); + dev_err(&adapter->ccw_device->dev, + "Shared access of read-write unit " + "0x%016Lx on port 0x%016Lx not " + "supported, disabling unit.\n", + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_unit_failed(unit, 36, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_unit_shutdown(unit, 0, 81, req); } } - - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - header->fsf_status); break; } - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); - return retval; } -/* - * function: zfcp_fsf_close_unit - * - * purpose: - * - * returns: address of fsf_req - request successfully initiated - * NULL - - * - * assumptions: This routine does not check whether the associated - * remote port/lun has already been opened. This should be - * done by calling routines. Otherwise some status - * may be presented by FSF +/** + * zfcp_fsf_open_unit - open unit + * @erp_action: pointer to struct zfcp_erp_action + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) +int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req; - unsigned long lock_flags; - int retval = 0; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(erp_action->adapter, - FSF_QTCB_CLOSE_LUN, - ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, - erp_action->adapter->pool.fsf_req_erp, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create close unit request for " - "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", - erp_action->unit->fcp_lun, - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; + + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + + req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - fsf_req->qtcb->header.port_handle = erp_action->port->handle; - fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; - atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); - fsf_req->data = (unsigned long) erp_action->unit; - fsf_req->erp_action = erp_action; - erp_action->fsf_req = fsf_req; + req->qtcb->header.port_handle = erp_action->port->handle; + req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; + req->handler = zfcp_fsf_open_unit_handler; + req->data = erp_action->unit; + req->erp_action = erp_action; + erp_action->fsf_req = req; - zfcp_erp_start_timer(fsf_req); - retval = zfcp_fsf_req_send(erp_action->fsf_req); + if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) + req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; + + atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); + + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); if (retval) { - ZFCP_LOG_INFO("error: Could not send a close unit request for " - "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", - erp_action->unit->fcp_lun, - erp_action->port->wwpn, - zfcp_get_busid_by_adapter(erp_action->adapter)); - zfcp_fsf_req_free(fsf_req); + zfcp_fsf_req_free(req); erp_action->fsf_req = NULL; - goto out; } - - ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " - "port 0x%016Lx, unit 0x%016Lx)\n", - zfcp_get_busid_by_adapter(erp_action->adapter), - erp_action->port->wwpn, erp_action->unit->fcp_lun); - out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -/* - * function: zfcp_fsf_close_unit_handler - * - * purpose: is called for finished Close LUN FSF command - * - * returns: - */ -static int -zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_unit *unit; - - unit = (struct zfcp_unit *) fsf_req->data; + struct zfcp_unit *unit = req->data; - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - /* don't change unit status in our bookkeeping */ + if (req->status & ZFCP_STATUS_FSFREQ_ERROR) goto skip_fsfstatus; - } - - /* evaluate FSF status in QTCB */ - switch (fsf_req->qtcb->header.fsf_status) { + switch (req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid. This may " - "happen in rare circumstances\n", - unit->port->handle, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_LUN_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " - "0x%016Lx on port 0x%016Lx on adapter %s is " - "invalid. This may happen occasionally.\n", - unit->handle, - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_DEBUG("Status qualifier data:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb->header.fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + zfcp_erp_port_reopen(unit->port, 0, 111, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " - "needs to be reopened\n", - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 52, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; + zfcp_erp_port_boxed(unit->port, 52, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - case FSF_ADAPTER_STATUS_AVAILABLE: - switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { + switch (req->qtcb->header.fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* re-establish link to port */ zfcp_test_link(unit->port); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + /* fall through */ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* ERP strategy will escalate */ - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - default: - ZFCP_LOG_NORMAL - ("bug: Wrong status qualifier 0x%x arrived.\n", - fsf_req->qtcb->header.fsf_status_qual.word[0]); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } break; - case FSF_GOOD: - ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " - "closed, port handle 0x%x\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - unit->handle); - /* mark unit as closed */ atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); - retval = 0; - break; - - default: - ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " - "(debug info 0x%x)\n", - fsf_req->qtcb->header.fsf_status); break; } - - skip_fsfstatus: +skip_fsfstatus: atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); - return retval; } /** - * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) - * @adapter: adapter where scsi command is issued - * @unit: unit where command is sent to - * @scsi_cmnd: scsi command to be sent - * @timer: timer to be started when request is initiated - * @req_flags: flags for fsf_request + * zfcp_fsf_close_unit - close zfcp unit + * @erp_action: pointer to struct zfcp_unit + * Returns: 0 on success, error otherwise */ -int -zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, - struct zfcp_unit *unit, - struct scsi_cmnd * scsi_cmnd, - int use_timer, int req_flags) +int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) { - struct zfcp_fsf_req *fsf_req = NULL; - struct fcp_cmnd_iu *fcp_cmnd_iu; - unsigned int sbtype; - unsigned long lock_flags; - int real_bytes = 0; - int retval = 0; - int mask; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, - adapter->pool.fsf_req_scsi, - &lock_flags, &fsf_req); - if (unlikely(retval < 0)) { - ZFCP_LOG_DEBUG("error: Could not create FCP command request " - "for unit 0x%016Lx on port 0x%016Lx on " - "adapter %s\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - goto failed_req_create; - } - - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status))) { - retval = -EBUSY; - goto unit_blocked; - } - - zfcp_unit_get(unit); - fsf_req->unit = unit; - - /* associate FSF request with SCSI request (for look up on abort) */ - scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id; - - /* associate SCSI command with FSF request */ - fsf_req->data = (unsigned long) scsi_cmnd; - - /* set handles of unit and its parent port in QTCB */ - fsf_req->qtcb->header.lun_handle = unit->handle; - fsf_req->qtcb->header.port_handle = unit->port->handle; - - /* FSF does not define the structure of the FCP_CMND IU */ - fcp_cmnd_iu = (struct fcp_cmnd_iu *) - &(fsf_req->qtcb->bottom.io.fcp_cmnd); - - /* - * set depending on data direction: - * data direction bits in SBALE (SB Type) - * data direction bits in QTCB - * data direction bits in FCP_CMND IU - */ - switch (scsi_cmnd->sc_data_direction) { - case DMA_NONE: - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; - /* - * FIXME(qdio): - * what is the correct type for commands - * without 'real' data buffers? - */ - sbtype = SBAL_FLAGS0_TYPE_READ; - break; - case DMA_FROM_DEVICE: - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; - sbtype = SBAL_FLAGS0_TYPE_READ; - fcp_cmnd_iu->rddata = 1; - break; - case DMA_TO_DEVICE: - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; - sbtype = SBAL_FLAGS0_TYPE_WRITE; - fcp_cmnd_iu->wddata = 1; - break; - case DMA_BIDIRECTIONAL: - default: - /* - * dummy, catch this condition earlier - * in zfcp_scsi_queuecommand - */ - goto failed_scsi_cmnd; - } - - /* set FC service class in QTCB (3 per default) */ - fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; - - /* set FCP_LUN in FCP_CMND IU in QTCB */ - fcp_cmnd_iu->fcp_lun = unit->fcp_lun; - - mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; - - /* set task attributes in FCP_CMND IU in QTCB */ - if (likely((scsi_cmnd->device->simple_tags) || - (atomic_test_mask(mask, &unit->status)))) - fcp_cmnd_iu->task_attribute = SIMPLE_Q; - else - fcp_cmnd_iu->task_attribute = UNTAGGED; - - /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ - if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { - fcp_cmnd_iu->add_fcp_cdb_length - = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; - ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " - "additional FCP_CDB length is 0x%x " - "(shifted right 2 bits)\n", - scsi_cmnd->cmd_len, - fcp_cmnd_iu->add_fcp_cdb_length); - } - /* - * copy SCSI CDB (including additional length, if any) to - * FCP_CDB in FCP_CMND IU in QTCB - */ - memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); - - /* FCP CMND IU length in QTCB */ - fsf_req->qtcb->bottom.io.fcp_cmnd_length = - sizeof (struct fcp_cmnd_iu) + - fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); + volatile struct qdio_buffer_element *sbale; + struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fsf_req *req; + int retval = -EIO; - /* generate SBALEs from data buffer */ - real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); - if (unlikely(real_bytes < 0)) { - if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { - ZFCP_LOG_DEBUG( - "Data did not fit into available buffer(s), " - "waiting for more...\n"); - retval = -EIO; - } else { - ZFCP_LOG_NORMAL("error: No truncation implemented but " - "required. Shutting down unit " - "(adapter %s, port 0x%016Lx, " - "unit 0x%016Lx)\n", - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, - unit->fcp_lun); - zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req); - retval = -EINVAL; - } - goto no_fit; + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN, + ZFCP_REQ_AUTO_CLEANUP, + adapter->pool.fsf_req_erp); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; } - /* set length of FCP data length in FCP_CMND IU in QTCB */ - zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - ZFCP_LOG_DEBUG("Sending SCSI command:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); + req->qtcb->header.port_handle = erp_action->port->handle; + req->qtcb->header.lun_handle = erp_action->unit->handle; + req->handler = zfcp_fsf_close_unit_handler; + req->data = erp_action->unit; + req->erp_action = erp_action; + erp_action->fsf_req = req; + atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); - if (use_timer) - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - - retval = zfcp_fsf_req_send(fsf_req); - if (unlikely(retval < 0)) { - ZFCP_LOG_INFO("error: Could not send FCP command request " - "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, - unit->fcp_lun); - goto send_failed; + zfcp_fsf_start_erp_timer(req); + retval = zfcp_fsf_req_send(req); + if (retval) { + zfcp_fsf_req_free(req); + erp_action->fsf_req = NULL; } - - ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " - "port 0x%016Lx, unit 0x%016Lx)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, - unit->fcp_lun); - goto success; - - send_failed: - no_fit: - failed_scsi_cmnd: - zfcp_unit_put(unit); - unit_blocked: - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; - scsi_cmnd->host_scribble = NULL; - success: - failed_req_create: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); +out: + spin_unlock(&adapter->req_q.lock); return retval; } -struct zfcp_fsf_req * -zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, - struct zfcp_unit *unit, - u8 tm_flags, int req_flags) +static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat) { - struct zfcp_fsf_req *fsf_req = NULL; - int retval = 0; - struct fcp_cmnd_iu *fcp_cmnd_iu; - unsigned long lock_flags; - volatile struct qdio_buffer_element *sbale; - - /* setup new FSF request */ - retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, - adapter->pool.fsf_req_scsi, - &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create FCP command (task " - "management) request for adapter %s, port " - " 0x%016Lx, unit 0x%016Lx.\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, unit->fcp_lun); - goto out; - } - - if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, - &unit->status))) - goto unit_blocked; - - /* - * Used to decide on proper handler in the return path, - * could be either zfcp_fsf_send_fcp_command_task_handler or - * zfcp_fsf_send_fcp_command_task_management_handler */ - - fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; - - /* - * hold a pointer to the unit being target of this - * task management request - */ - fsf_req->data = (unsigned long) unit; - - /* set FSF related fields in QTCB */ - fsf_req->qtcb->header.lun_handle = unit->handle; - fsf_req->qtcb->header.port_handle = unit->port->handle; - fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; - fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; - fsf_req->qtcb->bottom.io.fcp_cmnd_length = - sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - - /* set FCP related fields in FCP_CMND IU in QTCB */ - fcp_cmnd_iu = (struct fcp_cmnd_iu *) - &(fsf_req->qtcb->bottom.io.fcp_cmnd); - fcp_cmnd_iu->fcp_lun = unit->fcp_lun; - fcp_cmnd_iu->task_management_flags = tm_flags; - - zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - if (!retval) - goto out; - - unit_blocked: - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; - - out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - return fsf_req; + lat_rec->sum += lat; + lat_rec->min = min(lat_rec->min, lat); + lat_rec->max = max(lat_rec->max, lat); } -/* - * function: zfcp_fsf_send_fcp_command_handler - * - * purpose: is called for finished Send FCP Command - * - * returns: - */ -static int -zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req) { - int retval = -EINVAL; - struct zfcp_unit *unit; - struct fsf_qtcb_header *header; - u16 subtable, rule, counter; - - header = &fsf_req->qtcb->header; - - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) - unit = (struct zfcp_unit *) fsf_req->data; - else - unit = fsf_req->unit; - - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { - /* go directly to calls of special handlers */ - goto skip_fsfstatus; - } - - /* evaluate FSF status in QTCB */ - switch (header->fsf_status) { - - case FSF_PORT_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " - "0x%016Lx on adapter %s invalid\n", - unit->port->handle, - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_LUN_HANDLE_NOT_VALID: - ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " - "0x%016Lx on port 0x%016Lx on adapter %s is " - "invalid. This may happen occasionally.\n", - unit->handle, - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - ZFCP_LOG_NORMAL("Status qualifier data:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_HANDLE_MISMATCH: - ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " - "unexpectedly. (adapter %s, port 0x%016Lx, " - "unit 0x%016Lx)\n", - unit->port->handle, - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, - unit->fcp_lun); - ZFCP_LOG_NORMAL("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_SERVICE_CLASS_NOT_SUPPORTED: - ZFCP_LOG_INFO("error: adapter %s does not support fc " - "class %d.\n", - zfcp_get_busid_by_unit(unit), - ZFCP_FC_SERVICE_CLASS_DEFAULT); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 132, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_FCPLUN_NOT_VALID: - ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " - "adapter %s does not have correct unit " - "handle 0x%x\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - unit->handle); - ZFCP_LOG_DEBUG("status qualifier:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &header->fsf_status_qual, - sizeof (union fsf_status_qual)); - zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_ACCESS_DENIED: - ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " - "unit 0x%016Lx on port 0x%016Lx on " - "adapter %s\n", unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - for (counter = 0; counter < 2; counter++) { - subtable = header->fsf_status_qual.halfword[counter * 2]; - rule = header->fsf_status_qual.halfword[counter * 2 + 1]; - switch (subtable) { - case FSF_SQ_CFDC_SUBTABLE_OS: - case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: - case FSF_SQ_CFDC_SUBTABLE_PORT_DID: - case FSF_SQ_CFDC_SUBTABLE_LUN: - ZFCP_LOG_INFO("Access denied (%s rule %d)\n", - zfcp_act_subtable_type[subtable], rule); - break; - } - } - zfcp_erp_unit_access_denied(unit, 61, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_DIRECTION_INDICATOR_NOT_VALID: - ZFCP_LOG_INFO("bug: Invalid data direction given for unit " - "0x%016Lx on port 0x%016Lx on adapter %s " - "(debug info %d)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fsf_req->qtcb->bottom.io.data_direction); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; - - case FSF_CMND_LENGTH_NOT_VALID: - ZFCP_LOG_NORMAL - ("bug: An invalid control-data-block length field " - "was found in a command for unit 0x%016Lx on port " - "0x%016Lx on adapter %s " "(debug info %d)\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fsf_req->qtcb->bottom.io.fcp_cmnd_length); - /* stop operation for this adapter */ - zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; + struct fsf_qual_latency_info *lat_inf; + struct latency_cont *lat; + struct zfcp_unit *unit = req->unit; + unsigned long flags; - case FSF_PORT_BOXED: - ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " - "needs to be reopened\n", - unit->port->wwpn, zfcp_get_busid_by_unit(unit)); - zfcp_erp_port_boxed(unit->port, 53, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | - ZFCP_STATUS_FSFREQ_RETRY; - break; + lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info; - case FSF_LUN_BOXED: - ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " - "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", - zfcp_get_busid_by_unit(unit), - unit->port->wwpn, unit->fcp_lun); - zfcp_erp_unit_boxed(unit, 54, fsf_req); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR - | ZFCP_STATUS_FSFREQ_RETRY; - break; - - case FSF_ADAPTER_STATUS_AVAILABLE: - switch (header->fsf_status_qual.word[0]) { - case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: - /* re-establish link to port */ - zfcp_test_link(unit->port); - break; - case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - /* FIXME(hw) need proper specs for proper action */ - /* let scsi stack deal with retries and escalation */ - break; - default: - ZFCP_LOG_NORMAL - ("Unknown status qualifier 0x%x arrived.\n", - header->fsf_status_qual.word[0]); - break; - } - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; + switch (req->qtcb->bottom.io.data_direction) { + case FSF_DATADIR_READ: + lat = &unit->latencies.read; break; - - case FSF_GOOD: + case FSF_DATADIR_WRITE: + lat = &unit->latencies.write; break; - - case FSF_FCP_RSP_AVAILABLE: + case FSF_DATADIR_CMND: + lat = &unit->latencies.cmd; break; + default: + return; } - skip_fsfstatus: - if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { - retval = - zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); - } else { - retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); - fsf_req->unit = NULL; - zfcp_unit_put(unit); - } - return retval; + spin_lock_irqsave(&unit->latencies.lock, flags); + zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat); + zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat); + lat->counter++; + spin_unlock_irqrestore(&unit->latencies.lock, flags); } -/* - * function: zfcp_fsf_send_fcp_command_task_handler - * - * purpose: evaluates FCP_RSP IU - * - * returns: - */ -static int -zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req) { - int retval = 0; - struct scsi_cmnd *scpnt; + struct scsi_cmnd *scpnt = req->data; struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) - &(fsf_req->qtcb->bottom.io.fcp_rsp); - struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) - &(fsf_req->qtcb->bottom.io.fcp_cmnd); + &(req->qtcb->bottom.io.fcp_rsp); u32 sns_len; - char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); + char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; unsigned long flags; - struct zfcp_unit *unit = fsf_req->unit; - - read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); - scpnt = (struct scsi_cmnd *) fsf_req->data; - if (unlikely(!scpnt)) { - ZFCP_LOG_DEBUG - ("Command with fsf_req %p is not associated to " - "a scsi command anymore. Aborted?\n", fsf_req); - goto out; - } - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { - /* FIXME: (design) mid-layer should handle DID_ABORT like - * DID_SOFT_ERROR by retrying the request for devices - * that allow retries. - */ - ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); - set_host_byte(&scpnt->result, DID_SOFT_ERROR); - set_driver_byte(&scpnt->result, SUGGEST_RETRY); + + if (unlikely(!scpnt)) + return; + + read_lock_irqsave(&req->adapter->abort_lock, flags); + + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { + set_host_byte(scpnt, DID_SOFT_ERROR); + set_driver_byte(scpnt, SUGGEST_RETRY); goto skip_fsfstatus; } - if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { - ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); - set_host_byte(&scpnt->result, DID_ERROR); + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { + set_host_byte(scpnt, DID_ERROR); goto skip_fsfstatus; } - /* set message byte of result in SCSI command */ - scpnt->result |= COMMAND_COMPLETE << 8; + set_msg_byte(scpnt, COMMAND_COMPLETE); - /* - * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte - * of result in SCSI command - */ scpnt->result |= fcp_rsp_iu->scsi_status; - if (unlikely(fcp_rsp_iu->scsi_status)) { - /* DEBUG */ - ZFCP_LOG_DEBUG("status for SCSI Command:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - scpnt->cmnd, scpnt->cmd_len); - ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", - fcp_rsp_iu->scsi_status); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), - fcp_rsp_iu->fcp_sns_len); - } - /* check FCP_RSP_INFO */ + if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) + zfcp_fsf_req_latency(req); + if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { - ZFCP_LOG_DEBUG("rsp_len is valid\n"); - switch (fcp_rsp_info[3]) { - case RSP_CODE_GOOD: - /* ok, continue */ - ZFCP_LOG_TRACE("no failure or Task Management " - "Function complete\n"); - set_host_byte(&scpnt->result, DID_OK); - break; - case RSP_CODE_LENGTH_MISMATCH: - /* hardware bug */ - ZFCP_LOG_NORMAL("bug: FCP response code indictates " - "that the fibrechannel protocol data " - "length differs from the burst length. " - "The problem occured on unit 0x%016Lx " - "on port 0x%016Lx on adapter %s", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); - goto skip_fsfstatus; - case RSP_CODE_FIELD_INVALID: - /* driver or hardware bug */ - ZFCP_LOG_NORMAL("bug: FCP response code indictates " - "that the fibrechannel protocol data " - "fields were incorrectly set up. " - "The problem occured on the unit " - "0x%016Lx on port 0x%016Lx on " - "adapter %s", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); - goto skip_fsfstatus; - case RSP_CODE_RO_MISMATCH: - /* hardware bug */ - ZFCP_LOG_NORMAL("bug: The FCP response code indicates " - "that conflicting values for the " - "fibrechannel payload offset from the " - "header were found. " - "The problem occured on unit 0x%016Lx " - "on port 0x%016Lx on adapter %s.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); - goto skip_fsfstatus; - default: - ZFCP_LOG_NORMAL("bug: An invalid FCP response " - "code was detected for a command. " - "The problem occured on the unit " - "0x%016Lx on port 0x%016Lx on " - "adapter %s (debug info 0x%x)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_info[3]); - /* dump SCSI CDB as prepared by zfcp */ - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, - (char *) &fsf_req->qtcb-> - bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); - set_host_byte(&scpnt->result, DID_ERROR); + if (fcp_rsp_info[3] == RSP_CODE_GOOD) + set_host_byte(scpnt, DID_OK); + else { + set_host_byte(scpnt, DID_ERROR); goto skip_fsfstatus; } } - /* check for sense data */ if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { - sns_len = FSF_FCP_RSP_SIZE - - sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; - ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", - sns_len); + sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) + + fcp_rsp_iu->fcp_rsp_len; sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); - ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", - SCSI_SENSE_BUFFERSIZE); sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); - ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", - scpnt->result); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, - scpnt->cmnd, scpnt->cmd_len); - ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", - fcp_rsp_iu->fcp_sns_len); memcpy(scpnt->sense_buffer, zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, - (void *)scpnt->sense_buffer, sns_len); - } - - /* check for overrun */ - if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { - ZFCP_LOG_INFO("A data overrun was detected for a command. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s. " - "The response data length is " - "%d, the original length was %d.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_iu->fcp_resid, - (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); } - /* check for underrun */ if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { - ZFCP_LOG_INFO("A data underrun was detected for a command. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s. " - "The response data length is " - "%d, the original length was %d.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_iu->fcp_resid, - (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); - scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid); if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) < scpnt->underflow) - set_host_byte(&scpnt->result, DID_ERROR); + set_host_byte(scpnt, DID_ERROR); } - - skip_fsfstatus: - ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); - +skip_fsfstatus: if (scpnt->result != 0) - zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); + zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req); else if (scpnt->retries > 0) - zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); + zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req); else - zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req); + zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req); - /* cleanup pointer (need this especially for abort) */ scpnt->host_scribble = NULL; - - /* always call back */ (scpnt->scsi_done) (scpnt); - /* * We must hold this lock until scsi_done has been called. * Otherwise we may call scsi_done after abort regarding this * command has completed. * Note: scsi_done must not block! */ - out: - read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); - return retval; + read_unlock_irqrestore(&req->adapter->abort_lock, flags); } -/* - * function: zfcp_fsf_send_fcp_command_task_management_handler - * - * purpose: evaluates FCP_RSP IU - * - * returns: - */ -static int -zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) +static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req) { - int retval = 0; struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) - &(fsf_req->qtcb->bottom.io.fcp_rsp); - char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); - struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data; - - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; - goto skip_fsfstatus; - } + &(req->qtcb->bottom.io.fcp_rsp); + char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; - /* check FCP_RSP_INFO */ - switch (fcp_rsp_info[3]) { - case RSP_CODE_GOOD: - /* ok, continue */ - ZFCP_LOG_DEBUG("no failure or Task Management " - "Function complete\n"); - break; - case RSP_CODE_TASKMAN_UNSUPP: - ZFCP_LOG_NORMAL("bug: A reuested task management function " - "is not supported on the target device " - "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; - break; - case RSP_CODE_TASKMAN_FAILED: - ZFCP_LOG_NORMAL("bug: A reuested task management function " - "failed to complete successfully. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; - break; - default: - ZFCP_LOG_NORMAL("bug: An invalid FCP response " - "code was detected for a command. " - "unit 0x%016Lx, port 0x%016Lx, adapter %s " - "(debug info 0x%x)\n", - unit->fcp_lun, - unit->port->wwpn, - zfcp_get_busid_by_unit(unit), - fcp_rsp_info[3]); - fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; - } - - skip_fsfstatus: - return retval; + if ((fcp_rsp_info[3] != RSP_CODE_GOOD) || + (req->status & ZFCP_STATUS_FSFREQ_ERROR)) + req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; } -/* - * function: zfcp_fsf_control_file - * - * purpose: Initiator of the control file upload/download FSF requests - * - * returns: 0 - FSF request is successfuly created and queued - * -EOPNOTSUPP - The FCP adapter does not have Control File support - * -EINVAL - Invalid direction specified - * -ENOMEM - Insufficient memory - * -EPERM - Cannot create FSF request or place it in QDIO queue - */ -int -zfcp_fsf_control_file(struct zfcp_adapter *adapter, - struct zfcp_fsf_req **fsf_req_ptr, - u32 fsf_command, - u32 option, - struct zfcp_sg_list *sg_list) +static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req) { - struct zfcp_fsf_req *fsf_req; - struct fsf_qtcb_bottom_support *bottom; - volatile struct qdio_buffer_element *sbale; - unsigned long lock_flags; - int req_flags = 0; - int direction; - int retval = 0; - - if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) { - ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -EOPNOTSUPP; - goto out; - } - - switch (fsf_command) { - - case FSF_QTCB_DOWNLOAD_CONTROL_FILE: - direction = SBAL_FLAGS0_TYPE_WRITE; - if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && - (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) - req_flags = ZFCP_WAIT_FOR_SBAL; - break; - - case FSF_QTCB_UPLOAD_CONTROL_FILE: - direction = SBAL_FLAGS0_TYPE_READ; - break; - - default: - ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); - retval = -EINVAL; - goto out; - } - - retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, - NULL, &lock_flags, &fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("error: Could not create FSF request for the " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -EPERM; - goto unlock_queue_lock; - } - - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); - sbale[0].flags |= direction; - - bottom = &fsf_req->qtcb->bottom.support; - bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; - bottom->option = option; - - if (sg_list->count > 0) { - int bytes; - - bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, - sg_list->sg, sg_list->count, - ZFCP_MAX_SBALS_PER_REQ); - if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { - ZFCP_LOG_INFO( - "error: Could not create sufficient number of " - "SBALS for an FSF request to the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -ENOMEM; - goto free_fsf_req; - } - } else - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - - zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); - retval = zfcp_fsf_req_send(fsf_req); - if (retval < 0) { - ZFCP_LOG_INFO("initiation of cfdc up/download failed" - "(adapter %s)\n", - zfcp_get_busid_by_adapter(adapter)); - retval = -EPERM; - goto free_fsf_req; - } - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - - ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " - "adapter %s\n", - fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? - "download" : "upload", - zfcp_get_busid_by_adapter(adapter)); - - wait_event(fsf_req->completion_wq, - fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - - *fsf_req_ptr = fsf_req; - goto out; - - free_fsf_req: - zfcp_fsf_req_free(fsf_req); - unlock_queue_lock: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); - out: - return retval; -} - + struct zfcp_unit *unit; + struct fsf_qtcb_header *header = &req->qtcb->header; -/* - * function: zfcp_fsf_control_file_handler - * - * purpose: Handler of the control file upload/download FSF requests - * - * returns: 0 - FSF request successfuly processed - * -EAGAIN - Operation has to be repeated because of a temporary problem - * -EACCES - There is no permission to execute an operation - * -EPERM - The control file is not in a right format - * -EIO - There is a problem with the FCP adapter - * -EINVAL - Invalid operation - * -EFAULT - User space memory I/O operation fault - */ -static int -zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) -{ - struct zfcp_adapter *adapter = fsf_req->adapter; - struct fsf_qtcb_header *header = &fsf_req->qtcb->header; - struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; - int retval = 0; + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) + unit = req->data; + else + unit = req->unit; - if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { - retval = -EINVAL; + if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) goto skip_fsfstatus; - } switch (header->fsf_status) { - - case FSF_GOOD: - ZFCP_LOG_NORMAL( - "The FSF request has been successfully completed " - "on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - case FSF_OPERATION_PARTIALLY_SUCCESSFUL: - if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { - switch (header->fsf_status_qual.word[0]) { - - case FSF_SQ_CFDC_HARDENED_ON_SE: - ZFCP_LOG_NORMAL( - "CFDC on the adapter %s has being " - "hardened on primary and secondary SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: - ZFCP_LOG_NORMAL( - "CFDC of the adapter %s could not " - "be saved on the SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: - ZFCP_LOG_NORMAL( - "CFDC of the adapter %s could not " - "be copied to the secondary SE\n", - zfcp_get_busid_by_adapter(adapter)); - break; - - default: - ZFCP_LOG_NORMAL( - "CFDC could not be hardened " - "on the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - } - } - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EAGAIN; - break; - - case FSF_AUTHORIZATION_FAILURE: - ZFCP_LOG_NORMAL( - "Adapter %s does not accept privileged commands\n", - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EACCES; + case FSF_HANDLE_MISMATCH: + case FSF_PORT_HANDLE_NOT_VALID: + zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_CFDC_ERROR_DETECTED: - ZFCP_LOG_NORMAL( - "Error at position %d in the CFDC, " - "CFDC is discarded by the adapter %s\n", - header->fsf_status_qual.word[0], - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EPERM; + case FSF_FCPLUN_NOT_VALID: + case FSF_LUN_HANDLE_NOT_VALID: + zfcp_erp_port_reopen(unit->port, 0, 113, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_CONTROL_FILE_UPDATE_ERROR: - ZFCP_LOG_NORMAL( - "Adapter %s cannot harden the control file, " - "file is discarded\n", - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_SERVICE_CLASS_NOT_SUPPORTED: + zfcp_fsf_class_not_supp(req); break; - - case FSF_CONTROL_FILE_TOO_LARGE: - ZFCP_LOG_NORMAL( - "Control file is too large, file is discarded " - "by the adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_ACCESS_DENIED: + zfcp_fsf_access_denied_unit(req, unit); break; - - case FSF_ACCESS_CONFLICT_DETECTED: - if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) - ZFCP_LOG_NORMAL( - "CFDC has been discarded by the adapter %s, " - "because activation would impact " - "%d active connection(s)\n", - zfcp_get_busid_by_adapter(adapter), - header->fsf_status_qual.word[0]); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_DIRECTION_INDICATOR_NOT_VALID: + dev_err(&req->adapter->ccw_device->dev, + "Invalid data direction (%d) given for unit " + "0x%016Lx on port 0x%016Lx, shutting down " + "adapter.\n", + req->qtcb->bottom.io.data_direction, + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_CONFLICTS_OVERRULED: - if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) - ZFCP_LOG_NORMAL( - "CFDC has been activated on the adapter %s, " - "but activation has impacted " - "%d active connection(s)\n", - zfcp_get_busid_by_adapter(adapter), - header->fsf_status_qual.word[0]); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EIO; + case FSF_CMND_LENGTH_NOT_VALID: + dev_err(&req->adapter->ccw_device->dev, + "An invalid control-data-block length field (%d) " + "was found in a command for unit 0x%016Lx on port " + "0x%016Lx. Shutting down adapter.\n", + req->qtcb->bottom.io.fcp_cmnd_length, + unit->fcp_lun, unit->port->wwpn); + zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; - - case FSF_UNKNOWN_OP_SUBTYPE: - ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " - "op_subtype=0x%x)\n", - zfcp_get_busid_by_adapter(adapter), - bottom->operation_subtype); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; + case FSF_PORT_BOXED: + zfcp_erp_port_boxed(unit->port, 53, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - - case FSF_INVALID_COMMAND_OPTION: - ZFCP_LOG_NORMAL( - "Invalid option 0x%x has been specified " - "in QTCB bottom sent to the adapter %s\n", - bottom->option, - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; + case FSF_LUN_BOXED: + zfcp_erp_unit_boxed(unit, 54, req); + req->status |= ZFCP_STATUS_FSFREQ_ERROR | + ZFCP_STATUS_FSFREQ_RETRY; break; - - default: - ZFCP_LOG_NORMAL( - "bug: An unknown/unexpected FSF status 0x%08x " - "was presented on the adapter %s\n", - header->fsf_status, - zfcp_get_busid_by_adapter(adapter)); - fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; - retval = -EINVAL; + case FSF_ADAPTER_STATUS_AVAILABLE: + if (header->fsf_status_qual.word[0] == + FSF_SQ_INVOKE_LINK_TEST_PROCEDURE) + zfcp_test_link(unit->port); + req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } - skip_fsfstatus: - return retval; -} - -static inline int -zfcp_fsf_req_sbal_check(unsigned long *flags, - struct zfcp_qdio_queue *queue, int needed) -{ - write_lock_irqsave(&queue->queue_lock, *flags); - if (likely(atomic_read(&queue->free_count) >= needed)) - return 1; - write_unlock_irqrestore(&queue->queue_lock, *flags); - return 0; -} - -/* - * set qtcb pointer in fsf_req and initialize QTCB - */ -static void -zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) -{ - if (likely(fsf_req->qtcb != NULL)) { - fsf_req->qtcb->prefix.req_seq_no = - fsf_req->adapter->fsf_req_seq_no; - fsf_req->qtcb->prefix.req_id = fsf_req->req_id; - fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; - fsf_req->qtcb->prefix.qtcb_type = - fsf_qtcb_type[fsf_req->fsf_command]; - fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; - fsf_req->qtcb->header.req_handle = fsf_req->req_id; - fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; + if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) + zfcp_fsf_send_fcp_ctm_handler(req); + else { + zfcp_fsf_send_fcp_command_task_handler(req); + req->unit = NULL; + zfcp_unit_put(unit); } } /** - * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue - * @adapter: adapter for which request queue is examined - * @req_flags: flags indicating whether to wait for needed SBAL or not - * @lock_flags: lock_flags if queue_lock is taken - * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS - * Locks: lock adapter->request_queue->queue_lock on success - */ -static int -zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, - unsigned long *lock_flags) -{ - long ret; - struct zfcp_qdio_queue *req_queue = &adapter->request_queue; - - if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { - ret = wait_event_interruptible_timeout(adapter->request_wq, - zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), - ZFCP_SBAL_TIMEOUT); - if (ret < 0) - return ret; - if (!ret) - return -EIO; - } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) - return -EIO; - - return 0; -} - -/* - * function: zfcp_fsf_req_create - * - * purpose: create an FSF request at the specified adapter and - * setup common fields - * - * returns: -ENOMEM if there was insufficient memory for a request - * -EIO if no qdio buffers could be allocate to the request - * -EINVAL/-EPERM on bug conditions in req_dequeue - * 0 in success - * - * note: The created request is returned by reference. - * - * locks: lock of concerned request queue must not be held, - * but is held on completion (write, irqsave) + * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) + * @adapter: adapter where scsi command is issued + * @unit: unit where command is sent to + * @scsi_cmnd: scsi command to be sent + * @timer: timer to be started when request is initiated + * @req_flags: flags for fsf_request */ -int -zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, - mempool_t *pool, unsigned long *lock_flags, - struct zfcp_fsf_req **fsf_req_p) +int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, + struct zfcp_unit *unit, + struct scsi_cmnd *scsi_cmnd, + int use_timer, int req_flags) { - volatile struct qdio_buffer_element *sbale; - struct zfcp_fsf_req *fsf_req = NULL; - int ret = 0; - struct zfcp_qdio_queue *req_queue = &adapter->request_queue; - - /* allocate new FSF request */ - fsf_req = zfcp_fsf_req_alloc(pool, req_flags); - if (unlikely(NULL == fsf_req)) { - ZFCP_LOG_DEBUG("error: Could not put an FSF request into " - "the outbound (send) queue.\n"); - ret = -ENOMEM; - goto failed_fsf_req; - } - - fsf_req->adapter = adapter; - fsf_req->fsf_command = fsf_cmd; - INIT_LIST_HEAD(&fsf_req->list); - init_timer(&fsf_req->timer); + struct zfcp_fsf_req *req; + struct fcp_cmnd_iu *fcp_cmnd_iu; + unsigned int sbtype; + int real_bytes, retval = -EIO; - /* initialize waitqueue which may be used to wait on - this request completion */ - init_waitqueue_head(&fsf_req->completion_wq); + if (unlikely(!(atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + return -EBUSY; - ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); - if (ret < 0) - goto failed_sbals; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, + adapter->pool.fsf_req_scsi); + if (unlikely(IS_ERR(req))) { + retval = PTR_ERR(req); + goto out; + } - /* this is serialized (we are holding req_queue-lock of adapter) */ - if (adapter->req_no == 0) - adapter->req_no++; - fsf_req->req_id = adapter->req_no++; + zfcp_unit_get(unit); + req->unit = unit; + req->data = scsi_cmnd; + req->handler = zfcp_fsf_send_fcp_command_handler; + req->qtcb->header.lun_handle = unit->handle; + req->qtcb->header.port_handle = unit->port->handle; + req->qtcb->bottom.io.service_class = FSF_CLASS_3; - zfcp_fsf_req_qtcb_init(fsf_req); + scsi_cmnd->host_scribble = (unsigned char *) req->req_id; + fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd); + fcp_cmnd_iu->fcp_lun = unit->fcp_lun; /* - * We hold queue_lock here. Check if QDIOUP is set and let request fail - * if it is not set (see also *_open_qdio and *_close_qdio). + * set depending on data direction: + * data direction bits in SBALE (SB Type) + * data direction bits in QTCB + * data direction bits in FCP_CMND IU */ - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { - write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); - ret = -EIO; - goto failed_sbals; + switch (scsi_cmnd->sc_data_direction) { + case DMA_NONE: + req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; + sbtype = SBAL_FLAGS0_TYPE_READ; + break; + case DMA_FROM_DEVICE: + req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; + sbtype = SBAL_FLAGS0_TYPE_READ; + fcp_cmnd_iu->rddata = 1; + break; + case DMA_TO_DEVICE: + req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; + sbtype = SBAL_FLAGS0_TYPE_WRITE; + fcp_cmnd_iu->wddata = 1; + break; + case DMA_BIDIRECTIONAL: + default: + retval = -EIO; + goto failed_scsi_cmnd; } - if (fsf_req->qtcb) { - fsf_req->seq_no = adapter->fsf_req_seq_no; - fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; - } - fsf_req->sbal_number = 1; - fsf_req->sbal_first = req_queue->free_index; - fsf_req->sbal_curr = req_queue->free_index; - fsf_req->sbale_curr = 1; + if (likely((scsi_cmnd->device->simple_tags) || + ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) && + (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED)))) + fcp_cmnd_iu->task_attribute = SIMPLE_Q; + else + fcp_cmnd_iu->task_attribute = UNTAGGED; - if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { - fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - } + if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) + fcp_cmnd_iu->add_fcp_cdb_length = + (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); - /* setup common SBALE fields */ - sbale[0].addr = (void *) fsf_req->req_id; - sbale[0].flags |= SBAL_FLAGS0_COMMAND; - if (likely(fsf_req->qtcb != NULL)) { - sbale[1].addr = (void *) fsf_req->qtcb; - sbale[1].length = sizeof(struct fsf_qtcb); + req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) + + fcp_cmnd_iu->add_fcp_cdb_length + sizeof(fcp_dl_t); + + real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype, + scsi_sglist(scsi_cmnd), + FSF_MAX_SBALS_PER_REQ); + if (unlikely(real_bytes < 0)) { + if (req->sbal_number < FSF_MAX_SBALS_PER_REQ) + retval = -EIO; + else { + dev_err(&adapter->ccw_device->dev, + "SCSI request too large. " + "Shutting down unit 0x%016Lx on port " + "0x%016Lx.\n", unit->fcp_lun, + unit->port->wwpn); + zfcp_erp_unit_shutdown(unit, 0, 131, req); + retval = -EINVAL; + } + goto failed_scsi_cmnd; } - ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", - fsf_req->sbal_number, fsf_req->sbal_first); + zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); - goto success; + if (use_timer) + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); - failed_sbals: -/* dequeue new FSF request previously enqueued */ - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; + retval = zfcp_fsf_req_send(req); + if (unlikely(retval)) + goto failed_scsi_cmnd; - failed_fsf_req: - write_lock_irqsave(&req_queue->queue_lock, *lock_flags); - success: - *fsf_req_p = fsf_req; - return ret; + goto out; + +failed_scsi_cmnd: + zfcp_unit_put(unit); + zfcp_fsf_req_free(req); + scsi_cmnd->host_scribble = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return retval; } -/* - * function: zfcp_fsf_req_send - * - * purpose: start transfer of FSF request via QDIO - * - * returns: 0 - request transfer succesfully started - * !0 - start of request transfer failed +/** + * zfcp_fsf_send_fcp_ctm - send SCSI task management command + * @adapter: pointer to struct zfcp-adapter + * @unit: pointer to struct zfcp_unit + * @tm_flags: unsigned byte for task management flags + * @req_flags: int request flags + * Returns: on success pointer to struct fsf_req, NULL otherwise */ -static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) +struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter, + struct zfcp_unit *unit, + u8 tm_flags, int req_flags) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *req_queue; volatile struct qdio_buffer_element *sbale; - int inc_seq_no; - int new_distance_from_int; - int retval = 0; + struct zfcp_fsf_req *req = NULL; + struct fcp_cmnd_iu *fcp_cmnd_iu; - adapter = fsf_req->adapter; - req_queue = &adapter->request_queue, + if (unlikely(!(atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_UNBLOCKED))) + return NULL; + spin_lock(&adapter->req_q.lock); + if (!atomic_read(&adapter->req_q.count)) + goto out; + req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, + adapter->pool.fsf_req_scsi); + if (unlikely(IS_ERR(req))) + goto out; - /* FIXME(debug): remove it later */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); - ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); - ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, - sbale[1].length); + req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; + req->data = unit; + req->handler = zfcp_fsf_send_fcp_command_handler; + req->qtcb->header.lun_handle = unit->handle; + req->qtcb->header.port_handle = unit->port->handle; + req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; + req->qtcb->bottom.io.service_class = FSF_CLASS_3; + req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) + + sizeof(fcp_dl_t); + + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; + sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; - /* put allocated FSF request into hash table */ - spin_lock(&adapter->req_list_lock); - zfcp_reqlist_add(adapter, fsf_req); - spin_unlock(&adapter->req_list_lock); + fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd; + fcp_cmnd_iu->fcp_lun = unit->fcp_lun; + fcp_cmnd_iu->task_management_flags = tm_flags; - inc_seq_no = (fsf_req->qtcb != NULL); + zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); + if (!zfcp_fsf_req_send(req)) + goto out; - ZFCP_LOG_TRACE("request queue of adapter %s: " - "next free SBAL is %i, %i free SBALs\n", - zfcp_get_busid_by_adapter(adapter), - req_queue->free_index, - atomic_read(&req_queue->free_count)); + zfcp_fsf_req_free(req); + req = NULL; +out: + spin_unlock(&adapter->req_q.lock); + return req; +} - ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " - "index_in_queue=%i, count=%i, buffers=%p\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_OUTPUT, - 0, fsf_req->sbal_first, fsf_req->sbal_number, - &req_queue->buffer[fsf_req->sbal_first]); +static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req) +{ + if (req->qtcb->header.fsf_status != FSF_GOOD) + req->status |= ZFCP_STATUS_FSFREQ_ERROR; +} - /* - * adjust the number of free SBALs in request queue as well as - * position of first one - */ - atomic_sub(fsf_req->sbal_number, &req_queue->free_count); - ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); - req_queue->free_index += fsf_req->sbal_number; /* increase */ - req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ - new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); +/** + * zfcp_fsf_control_file - control file upload/download + * @adapter: pointer to struct zfcp_adapter + * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc + * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise + */ +struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, + struct zfcp_fsf_cfdc *fsf_cfdc) +{ + volatile struct qdio_buffer_element *sbale; + struct zfcp_fsf_req *req = NULL; + struct fsf_qtcb_bottom_support *bottom; + int direction, retval = -EIO, bytes; + + if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) + return ERR_PTR(-EOPNOTSUPP); + + switch (fsf_cfdc->command) { + case FSF_QTCB_DOWNLOAD_CONTROL_FILE: + direction = SBAL_FLAGS0_TYPE_WRITE; + break; + case FSF_QTCB_UPLOAD_CONTROL_FILE: + direction = SBAL_FLAGS0_TYPE_READ; + break; + default: + return ERR_PTR(-EINVAL); + } - fsf_req->issued = get_clock(); + spin_lock(&adapter->req_q.lock); + if (zfcp_fsf_req_sbal_get(adapter)) + goto out; - retval = do_QDIO(adapter->ccw_device, - QDIO_FLAG_SYNC_OUTPUT, - 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); + req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL); + if (unlikely(IS_ERR(req))) { + retval = -EPERM; + goto out; + } - if (unlikely(retval)) { - /* Queues are down..... */ - retval = -EIO; - del_timer(&fsf_req->timer); - spin_lock(&adapter->req_list_lock); - zfcp_reqlist_remove(adapter, fsf_req); - spin_unlock(&adapter->req_list_lock); - /* undo changes in request queue made for this request */ - zfcp_qdio_zero_sbals(req_queue->buffer, - fsf_req->sbal_first, fsf_req->sbal_number); - atomic_add(fsf_req->sbal_number, &req_queue->free_count); - req_queue->free_index -= fsf_req->sbal_number; - req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; - req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ - zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req); - } else { - req_queue->distance_from_int = new_distance_from_int; - /* - * increase FSF sequence counter - - * this must only be done for request successfully enqueued to - * QDIO this rejected requests may be cleaned up by calling - * routines resulting in missing sequence counter values - * otherwise, - */ + req->handler = zfcp_fsf_control_file_handler; + + sbale = zfcp_qdio_sbale_req(req); + sbale[0].flags |= direction; - /* Don't increase for unsolicited status */ - if (inc_seq_no) - adapter->fsf_req_seq_no++; + bottom = &req->qtcb->bottom.support; + bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; + bottom->option = fsf_cfdc->option; - /* count FSF requests pending */ - atomic_inc(&adapter->reqs_active); + bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg, + FSF_MAX_SBALS_PER_REQ); + if (bytes != ZFCP_CFDC_MAX_SIZE) { + retval = -ENOMEM; + zfcp_fsf_req_free(req); + goto out; } - return retval; -} -#undef ZFCP_LOG_AREA + zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); + retval = zfcp_fsf_req_send(req); +out: + spin_unlock(&adapter->req_q.lock); + + if (!retval) { + wait_event(req->completion_wq, + req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + return req; + } + return ERR_PTR(retval); +} diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h index 099970b..bf94b4d 100644 --- a/drivers/s390/scsi/zfcp_fsf.h +++ b/drivers/s390/scsi/zfcp_fsf.h @@ -1,27 +1,16 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Interface to the FSF support functions. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #ifndef FSF_H #define FSF_H +#include <linux/pfn.h> + #define FSF_QTCB_CURRENT_VERSION 0x00000001 /* FSF commands */ @@ -258,6 +247,16 @@ #define FSF_UNIT_ACCESS_EXCLUSIVE 0x02000000 #define FSF_UNIT_ACCESS_OUTBOUND_TRANSFER 0x10000000 +/* FSF interface for CFDC */ +#define ZFCP_CFDC_MAX_SIZE 127 * 1024 +#define ZFCP_CFDC_PAGES PFN_UP(ZFCP_CFDC_MAX_SIZE) + +struct zfcp_fsf_cfdc { + struct scatterlist sg[ZFCP_CFDC_PAGES]; + u32 command; + u32 option; +}; + struct fsf_queue_designator { u8 cssid; u8 chpid; @@ -288,6 +287,18 @@ struct fsf_bit_error_payload { u32 current_transmit_b2b_credit; } __attribute__ ((packed)); +struct fsf_link_down_info { + u32 error_code; + u32 res1; + u8 res2[2]; + u8 primary_status; + u8 ioerr_code; + u8 action_code; + u8 reason_code; + u8 explanation_code; + u8 vendor_specific_code; +} __attribute__ ((packed)); + struct fsf_status_read_buffer { u32 status_type; u32 status_subtype; @@ -298,7 +309,12 @@ struct fsf_status_read_buffer { u32 class; u64 fcp_lun; u8 res3[24]; - u8 payload[FSF_STATUS_READ_PAYLOAD_SIZE]; + union { + u8 data[FSF_STATUS_READ_PAYLOAD_SIZE]; + u32 word[FSF_STATUS_READ_PAYLOAD_SIZE/sizeof(u32)]; + struct fsf_link_down_info link_down_info; + struct fsf_bit_error_payload bit_error; + } payload; } __attribute__ ((packed)); struct fsf_qual_version_error { @@ -311,23 +327,19 @@ struct fsf_qual_sequence_error { u32 res1[3]; } __attribute__ ((packed)); -struct fsf_link_down_info { - u32 error_code; - u32 res1; - u8 res2[2]; - u8 primary_status; - u8 ioerr_code; - u8 action_code; - u8 reason_code; - u8 explanation_code; - u8 vendor_specific_code; +struct fsf_qual_latency_info { + u32 channel_lat; + u32 fabric_lat; + u8 res1[8]; } __attribute__ ((packed)); union fsf_prot_status_qual { + u32 word[FSF_PROT_STATUS_QUAL_SIZE / sizeof(u32)]; u64 doubleword[FSF_PROT_STATUS_QUAL_SIZE / sizeof(u64)]; struct fsf_qual_version_error version_error; struct fsf_qual_sequence_error sequence_error; struct fsf_link_down_info link_down_info; + struct fsf_qual_latency_info latency_info; } __attribute__ ((packed)); struct fsf_qtcb_prefix { @@ -437,7 +449,9 @@ struct fsf_qtcb_bottom_config { u32 fc_link_speed; u32 adapter_type; u32 peer_d_id; - u8 res2[12]; + u8 res1[2]; + u16 timer_interval; + u8 res2[8]; u32 s_id; struct fsf_nport_serv_param nport_serv_param; u8 reserved_nport_serv_param[16]; diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 8ca5f07..72e3094 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -1,241 +1,103 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Setup and helper functions to access QDIO. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *, int); -static inline volatile struct qdio_buffer_element *zfcp_qdio_sbale_get - (struct zfcp_qdio_queue *, int, int); -static inline volatile struct qdio_buffer_element *zfcp_qdio_sbale_resp - (struct zfcp_fsf_req *, int, int); -static volatile struct qdio_buffer_element *zfcp_qdio_sbal_chain - (struct zfcp_fsf_req *, unsigned long); -static volatile struct qdio_buffer_element *zfcp_qdio_sbale_next - (struct zfcp_fsf_req *, unsigned long); -static int zfcp_qdio_sbals_zero(struct zfcp_qdio_queue *, int, int); -static inline int zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *); -static void zfcp_qdio_sbale_fill - (struct zfcp_fsf_req *, unsigned long, void *, int); -static int zfcp_qdio_sbals_from_segment - (struct zfcp_fsf_req *, unsigned long, void *, unsigned long); - -static qdio_handler_t zfcp_qdio_request_handler; -static qdio_handler_t zfcp_qdio_response_handler; -static int zfcp_qdio_handler_error_check(struct zfcp_adapter *, - unsigned int, unsigned int, unsigned int, int, int); - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_QDIO - -/* - * Frees BUFFER memory for each of the pointers of the struct qdio_buffer array - * in the adapter struct sbuf is the pointer array. - * - * locks: must only be called with zfcp_data.config_sema taken - */ -static void -zfcp_qdio_buffers_dequeue(struct qdio_buffer **sbuf) -{ - int pos; - - for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) - free_page((unsigned long) sbuf[pos]); -} +/* FIXME(tune): free space should be one max. SBAL chain plus what? */ +#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ + - (FSF_MAX_SBALS_PER_REQ + 4)) +#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) -/* - * Allocates BUFFER memory to each of the pointers of the qdio_buffer_t - * array in the adapter struct. - * Cur_buf is the pointer array - * - * returns: zero on success else -ENOMEM - * locks: must only be called with zfcp_data.config_sema taken - */ -static int -zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbuf) +static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal) { int pos; for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) { - sbuf[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); - if (!sbuf[pos]) { - zfcp_qdio_buffers_dequeue(sbuf); + sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); + if (!sbal[pos]) return -ENOMEM; - } } for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++) if (pos % QBUFF_PER_PAGE) - sbuf[pos] = sbuf[pos - 1] + 1; + sbal[pos] = sbal[pos - 1] + 1; return 0; } -/* locks: must only be called with zfcp_data.config_sema taken */ -int -zfcp_qdio_allocate_queues(struct zfcp_adapter *adapter) +static volatile struct qdio_buffer_element * +zfcp_qdio_sbale(struct zfcp_qdio_queue *q, int sbal_idx, int sbale_idx) { - int ret; - - ret = zfcp_qdio_buffers_enqueue(adapter->request_queue.buffer); - if (ret) - return ret; - return zfcp_qdio_buffers_enqueue(adapter->response_queue.buffer); + return &q->sbal[sbal_idx]->element[sbale_idx]; } -/* locks: must only be called with zfcp_data.config_sema taken */ -void -zfcp_qdio_free_queues(struct zfcp_adapter *adapter) +/** + * zfcp_qdio_free - free memory used by request- and resposne queue + * @adapter: pointer to the zfcp_adapter structure + */ +void zfcp_qdio_free(struct zfcp_adapter *adapter) { - ZFCP_LOG_TRACE("freeing request_queue buffers\n"); - zfcp_qdio_buffers_dequeue(adapter->request_queue.buffer); + struct qdio_buffer **sbal_req, **sbal_resp; + int p; - ZFCP_LOG_TRACE("freeing response_queue buffers\n"); - zfcp_qdio_buffers_dequeue(adapter->response_queue.buffer); -} + if (adapter->ccw_device) + qdio_free(adapter->ccw_device); -int -zfcp_qdio_allocate(struct zfcp_adapter *adapter) -{ - struct qdio_initialize *init_data; + sbal_req = adapter->req_q.sbal; + sbal_resp = adapter->resp_q.sbal; - init_data = &adapter->qdio_init_data; + for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) { + free_page((unsigned long) sbal_req[p]); + free_page((unsigned long) sbal_resp[p]); + } +} - init_data->cdev = adapter->ccw_device; - init_data->q_format = QDIO_SCSI_QFMT; - memcpy(init_data->adapter_name, zfcp_get_busid_by_adapter(adapter), 8); - ASCEBC(init_data->adapter_name, 8); - init_data->qib_param_field_format = 0; - init_data->qib_param_field = NULL; - init_data->input_slib_elements = NULL; - init_data->output_slib_elements = NULL; - init_data->min_input_threshold = ZFCP_MIN_INPUT_THRESHOLD; - init_data->max_input_threshold = ZFCP_MAX_INPUT_THRESHOLD; - init_data->min_output_threshold = ZFCP_MIN_OUTPUT_THRESHOLD; - init_data->max_output_threshold = ZFCP_MAX_OUTPUT_THRESHOLD; - init_data->no_input_qs = 1; - init_data->no_output_qs = 1; - init_data->input_handler = zfcp_qdio_response_handler; - init_data->output_handler = zfcp_qdio_request_handler; - init_data->int_parm = (unsigned long) adapter; - init_data->flags = QDIO_INBOUND_0COPY_SBALS | - QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; - init_data->input_sbal_addr_array = - (void **) (adapter->response_queue.buffer); - init_data->output_sbal_addr_array = - (void **) (adapter->request_queue.buffer); +static void zfcp_qdio_handler_error(struct zfcp_adapter *adapter, u8 id) +{ + dev_warn(&adapter->ccw_device->dev, "QDIO problem occurred.\n"); - return qdio_allocate(init_data); + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, id, NULL); } -/* - * function: zfcp_qdio_handler_error_check - * - * purpose: called by the response handler to determine error condition - * - * returns: error flag - * - */ -static int -zfcp_qdio_handler_error_check(struct zfcp_adapter *adapter, unsigned int status, - unsigned int qdio_error, unsigned int siga_error, - int first_element, int elements_processed) +static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt) { - int retval = 0; + int i, sbal_idx; - if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { - retval = -EIO; - - ZFCP_LOG_INFO("QDIO problem occurred (status=0x%x, " - "qdio_error=0x%x, siga_error=0x%x)\n", - status, qdio_error, siga_error); - - zfcp_hba_dbf_event_qdio(adapter, status, qdio_error, siga_error, - first_element, elements_processed); - /* - * Restarting IO on the failed adapter from scratch. - * Since we have been using this adapter, it is save to assume - * that it is not failed but recoverable. The card seems to - * report link-up events by self-initiated queue shutdown. - * That is why we need to clear the link-down flag - * which is set again in case we have missed by a mile. - */ - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | - ZFCP_STATUS_COMMON_ERP_FAILED, 140, - NULL); + for (i = first; i < first + cnt; i++) { + sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q; + memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer)); } - return retval; } -/* - * function: zfcp_qdio_request_handler - * - * purpose: is called by QDIO layer for completed SBALs in request queue - * - * returns: (void) - */ -static void -zfcp_qdio_request_handler(struct ccw_device *ccw_device, - unsigned int status, - unsigned int qdio_error, - unsigned int siga_error, - unsigned int queue_number, - int first_element, - int elements_processed, - unsigned long int_parm) +static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int status, + unsigned int qdio_err, unsigned int siga_err, + unsigned int queue_no, int first, int count, + unsigned long parm) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *queue; - - adapter = (struct zfcp_adapter *) int_parm; - queue = &adapter->request_queue; - - ZFCP_LOG_DEBUG("adapter %s, first=%d, elements_processed=%d\n", - zfcp_get_busid_by_adapter(adapter), - first_element, elements_processed); + struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm; + struct zfcp_qdio_queue *queue = &adapter->req_q; - if (unlikely(zfcp_qdio_handler_error_check(adapter, status, qdio_error, - siga_error, first_element, - elements_processed))) - goto out; - /* - * we stored address of struct zfcp_adapter data structure - * associated with irq in int_parm - */ + if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { + zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err, + first, count); + zfcp_qdio_handler_error(adapter, 140); + return; + } /* cleanup all SBALs being program-owned now */ - zfcp_qdio_zero_sbals(queue->buffer, first_element, elements_processed); + zfcp_qdio_zero_sbals(queue->sbal, first, count); - /* increase free space in outbound queue */ - atomic_add(elements_processed, &queue->free_count); - ZFCP_LOG_DEBUG("free_count=%d\n", atomic_read(&queue->free_count)); + atomic_add(count, &queue->count); wake_up(&adapter->request_wq); - ZFCP_LOG_DEBUG("elements_processed=%d, free count=%d\n", - elements_processed, atomic_read(&queue->free_count)); - out: - return; } -/** - * zfcp_qdio_reqid_check - checks for valid reqids. - */ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, - unsigned long req_id) + unsigned long req_id, int sbal_idx) { struct zfcp_fsf_req *fsf_req; unsigned long flags; @@ -248,203 +110,117 @@ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, * Unknown request means that we have potentially memory * corruption and must stop the machine immediatly. */ - panic("error: unknown request id (%ld) on adapter %s.\n", + panic("error: unknown request id (%lx) on adapter %s.\n", req_id, zfcp_get_busid_by_adapter(adapter)); zfcp_reqlist_remove(adapter, fsf_req); - atomic_dec(&adapter->reqs_active); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - /* finish the FSF request */ + fsf_req->sbal_response = sbal_idx; zfcp_fsf_req_complete(fsf_req); } -/* - * function: zfcp_qdio_response_handler - * - * purpose: is called by QDIO layer for completed SBALs in response queue - * - * returns: (void) - */ -static void -zfcp_qdio_response_handler(struct ccw_device *ccw_device, - unsigned int status, - unsigned int qdio_error, - unsigned int siga_error, - unsigned int queue_number, - int first_element, - int elements_processed, - unsigned long int_parm) +static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *queue; - int buffer_index; - int i; - struct qdio_buffer *buffer; - int retval = 0; - u8 count; - u8 start; - volatile struct qdio_buffer_element *buffere = NULL; - int buffere_index; - - adapter = (struct zfcp_adapter *) int_parm; - queue = &adapter->response_queue; - - if (unlikely(zfcp_qdio_handler_error_check(adapter, status, qdio_error, - siga_error, first_element, - elements_processed))) - goto out; + struct zfcp_qdio_queue *queue = &adapter->resp_q; + struct ccw_device *cdev = adapter->ccw_device; + u8 count, start = queue->first; + unsigned int retval; - /* - * we stored address of struct zfcp_adapter data structure - * associated with irq in int_parm - */ + count = atomic_read(&queue->count) + processed; + + retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, + 0, start, count, NULL); + + if (unlikely(retval)) { + atomic_set(&queue->count, count); + /* FIXME: Recover this with an adapter reopen? */ + } else { + queue->first += count; + queue->first %= QDIO_MAX_BUFFERS_PER_Q; + atomic_set(&queue->count, 0); + } +} + +static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int status, + unsigned int qdio_err, unsigned int siga_err, + unsigned int queue_no, int first, int count, + unsigned long parm) +{ + struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm; + struct zfcp_qdio_queue *queue = &adapter->resp_q; + volatile struct qdio_buffer_element *sbale; + int sbal_idx, sbale_idx, sbal_no; + + if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { + zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err, + first, count); + zfcp_qdio_handler_error(adapter, 147); + return; + } - buffere = &(queue->buffer[first_element]->element[0]); - ZFCP_LOG_DEBUG("first BUFFERE flags=0x%x\n", buffere->flags); /* * go through all SBALs from input queue currently * returned by QDIO layer */ - - for (i = 0; i < elements_processed; i++) { - - buffer_index = first_element + i; - buffer_index %= QDIO_MAX_BUFFERS_PER_Q; - buffer = queue->buffer[buffer_index]; + for (sbal_no = 0; sbal_no < count; sbal_no++) { + sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q; /* go through all SBALEs of SBAL */ - for (buffere_index = 0; - buffere_index < QDIO_MAX_ELEMENTS_PER_BUFFER; - buffere_index++) { - - /* look for QDIO request identifiers in SB */ - buffere = &buffer->element[buffere_index]; + for (sbale_idx = 0; sbale_idx < QDIO_MAX_ELEMENTS_PER_BUFFER; + sbale_idx++) { + sbale = zfcp_qdio_sbale(queue, sbal_idx, sbale_idx); zfcp_qdio_reqid_check(adapter, - (unsigned long) buffere->addr); - - /* - * A single used SBALE per inbound SBALE has been - * implemented by QDIO so far. Hope they will - * do some optimisation. Will need to change to - * unlikely() then. - */ - if (likely(buffere->flags & SBAL_FLAGS_LAST_ENTRY)) + (unsigned long) sbale->addr, + sbal_idx); + if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY)) break; }; - if (unlikely(!(buffere->flags & SBAL_FLAGS_LAST_ENTRY))) { - ZFCP_LOG_NORMAL("bug: End of inbound data " - "not marked!\n"); - } + if (unlikely(!(sbale->flags & SBAL_FLAGS_LAST_ENTRY))) + dev_warn(&adapter->ccw_device->dev, + "Protocol violation by adapter. " + "Continuing operations.\n"); } /* * put range of SBALs back to response queue * (including SBALs which have already been free before) */ - count = atomic_read(&queue->free_count) + elements_processed; - start = queue->free_index; - - ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " - "queue_no=%i, index_in_queue=%i, count=%i, " - "buffers=0x%lx\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, - 0, start, count, (unsigned long) &queue->buffer[start]); - - retval = do_QDIO(ccw_device, - QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, - 0, start, count, NULL); - - if (unlikely(retval)) { - atomic_set(&queue->free_count, count); - ZFCP_LOG_DEBUG("clearing of inbound data regions failed, " - "queues may be down " - "(count=%d, start=%d, retval=%d)\n", - count, start, retval); - } else { - queue->free_index += count; - queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; - atomic_set(&queue->free_count, 0); - ZFCP_LOG_TRACE("%i buffers enqueued to response " - "queue at position %i\n", count, start); - } - out: - return; -} - -/** - * zfcp_qdio_sbale_get - return pointer to SBALE of qdio_queue - * @queue: queue from which SBALE should be returned - * @sbal: specifies number of SBAL in queue - * @sbale: specifes number of SBALE in SBAL - */ -static inline volatile struct qdio_buffer_element * -zfcp_qdio_sbale_get(struct zfcp_qdio_queue *queue, int sbal, int sbale) -{ - return &queue->buffer[sbal]->element[sbale]; + zfcp_qdio_resp_put_back(adapter, count); } /** - * zfcp_qdio_sbale_req - return pointer to SBALE of request_queue for - * a struct zfcp_fsf_req + * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req + * @fsf_req: pointer to struct fsf_req + * Returns: pointer to qdio_buffer_element (SBALE) structure */ volatile struct qdio_buffer_element * -zfcp_qdio_sbale_req(struct zfcp_fsf_req *fsf_req, int sbal, int sbale) +zfcp_qdio_sbale_req(struct zfcp_fsf_req *req) { - return zfcp_qdio_sbale_get(&fsf_req->adapter->request_queue, - sbal, sbale); + return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, 0); } /** - * zfcp_qdio_sbale_resp - return pointer to SBALE of response_queue for - * a struct zfcp_fsf_req - */ -static inline volatile struct qdio_buffer_element * -zfcp_qdio_sbale_resp(struct zfcp_fsf_req *fsf_req, int sbal, int sbale) -{ - return zfcp_qdio_sbale_get(&fsf_req->adapter->response_queue, - sbal, sbale); -} - -/** - * zfcp_qdio_sbale_curr - return current SBALE on request_queue for - * a struct zfcp_fsf_req + * zfcp_qdio_sbale_curr - return curr SBALE on req_q for a struct zfcp_fsf_req + * @fsf_req: pointer to struct fsf_req + * Returns: pointer to qdio_buffer_element (SBALE) structure */ volatile struct qdio_buffer_element * -zfcp_qdio_sbale_curr(struct zfcp_fsf_req *fsf_req) +zfcp_qdio_sbale_curr(struct zfcp_fsf_req *req) { - return zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, - fsf_req->sbale_curr); + return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, + req->sbale_curr); } -/** - * zfcp_qdio_sbal_limit - determine maximum number of SBALs that can be used - * on the request_queue for a struct zfcp_fsf_req - * @fsf_req: the number of the last SBAL that can be used is stored herein - * @max_sbals: used to pass an upper limit for the number of SBALs - * - * Note: We can assume at least one free SBAL in the request_queue when called. - */ -static void -zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals) +static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals) { - int count = atomic_read(&fsf_req->adapter->request_queue.free_count); + int count = atomic_read(&fsf_req->adapter->req_q.count); count = min(count, max_sbals); - fsf_req->sbal_last = fsf_req->sbal_first; - fsf_req->sbal_last += (count - 1); - fsf_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q; + fsf_req->sbal_limit = (fsf_req->sbal_first + count - 1) + % QDIO_MAX_BUFFERS_PER_Q; } -/** - * zfcp_qdio_sbal_chain - chain SBALs if more than one SBAL is needed for a - * request - * @fsf_req: zfcp_fsf_req to be processed - * @sbtype: SBAL flags which have to be set in first SBALE of new SBAL - * - * This function changes sbal_curr, sbale_curr, sbal_number of fsf_req. - */ static volatile struct qdio_buffer_element * zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) { @@ -455,16 +231,16 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) sbale->flags |= SBAL_FLAGS_LAST_ENTRY; /* don't exceed last allowed SBAL */ - if (fsf_req->sbal_curr == fsf_req->sbal_last) + if (fsf_req->sbal_last == fsf_req->sbal_limit) return NULL; /* set chaining flag in first SBALE of current SBAL */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale->flags |= SBAL_FLAGS0_MORE_SBALS; /* calculate index of next SBAL */ - fsf_req->sbal_curr++; - fsf_req->sbal_curr %= QDIO_MAX_BUFFERS_PER_Q; + fsf_req->sbal_last++; + fsf_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q; /* keep this requests number of SBALs up-to-date */ fsf_req->sbal_number++; @@ -479,214 +255,255 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) return sbale; } -/** - * zfcp_qdio_sbale_next - switch to next SBALE, chain SBALs if needed - */ static volatile struct qdio_buffer_element * zfcp_qdio_sbale_next(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) { if (fsf_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL) return zfcp_qdio_sbal_chain(fsf_req, sbtype); - fsf_req->sbale_curr++; - return zfcp_qdio_sbale_curr(fsf_req); } -/** - * zfcp_qdio_sbals_zero - initialize SBALs between first and last in queue - * with zero from - */ -static int -zfcp_qdio_sbals_zero(struct zfcp_qdio_queue *queue, int first, int last) -{ - struct qdio_buffer **buf = queue->buffer; - int curr = first; - int count = 0; - - for(;;) { - curr %= QDIO_MAX_BUFFERS_PER_Q; - count++; - memset(buf[curr], 0, sizeof(struct qdio_buffer)); - if (curr == last) - break; - curr++; - } - return count; -} - - -/** - * zfcp_qdio_sbals_wipe - reset all changes in SBALs for an fsf_req - */ -static inline int -zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *fsf_req) +static void zfcp_qdio_undo_sbals(struct zfcp_fsf_req *fsf_req) { - return zfcp_qdio_sbals_zero(&fsf_req->adapter->request_queue, - fsf_req->sbal_first, fsf_req->sbal_curr); + struct qdio_buffer **sbal = fsf_req->adapter->req_q.sbal; + int first = fsf_req->sbal_first; + int last = fsf_req->sbal_last; + int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) % + QDIO_MAX_BUFFERS_PER_Q + 1; + zfcp_qdio_zero_sbals(sbal, first, count); } - -/** - * zfcp_qdio_sbale_fill - set address and length in current SBALE - * on request_queue - */ -static void -zfcp_qdio_sbale_fill(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - void *addr, int length) +static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req, + unsigned int sbtype, void *start_addr, + unsigned int total_length) { volatile struct qdio_buffer_element *sbale; - - sbale = zfcp_qdio_sbale_curr(fsf_req); - sbale->addr = addr; - sbale->length = length; -} - -/** - * zfcp_qdio_sbals_from_segment - map memory segment to SBALE(s) - * @fsf_req: request to be processed - * @sbtype: SBALE flags - * @start_addr: address of memory segment - * @total_length: length of memory segment - * - * Alignment and length of the segment determine how many SBALEs are needed - * for the memory segment. - */ -static int -zfcp_qdio_sbals_from_segment(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - void *start_addr, unsigned long total_length) -{ unsigned long remaining, length; void *addr; - /* split segment up heeding page boundaries */ + /* split segment up */ for (addr = start_addr, remaining = total_length; remaining > 0; addr += length, remaining -= length) { - /* get next free SBALE for new piece */ - if (NULL == zfcp_qdio_sbale_next(fsf_req, sbtype)) { - /* no SBALE left, clean up and leave */ - zfcp_qdio_sbals_wipe(fsf_req); + sbale = zfcp_qdio_sbale_next(fsf_req, sbtype); + if (!sbale) { + zfcp_qdio_undo_sbals(fsf_req); return -EINVAL; } - /* calculate length of new piece */ + + /* new piece must not exceed next page boundary */ length = min(remaining, - (PAGE_SIZE - ((unsigned long) addr & + (PAGE_SIZE - ((unsigned long)addr & (PAGE_SIZE - 1)))); - /* fill current SBALE with calculated piece */ - zfcp_qdio_sbale_fill(fsf_req, sbtype, addr, length); + sbale->addr = addr; + sbale->length = length; } - return total_length; + return 0; } - /** * zfcp_qdio_sbals_from_sg - fill SBALs from scatter-gather list * @fsf_req: request to be processed * @sbtype: SBALE flags * @sg: scatter-gather list - * @sg_count: number of elements in scatter-gather list * @max_sbals: upper bound for number of SBALs to be used + * Returns: number of bytes, or error (negativ) */ -int -zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - struct scatterlist *sgl, int sg_count, int max_sbals) +int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, + struct scatterlist *sg, int max_sbals) { - int sg_index; - struct scatterlist *sg_segment; - int retval; volatile struct qdio_buffer_element *sbale; - int bytes = 0; + int retval, bytes = 0; /* figure out last allowed SBAL */ zfcp_qdio_sbal_limit(fsf_req, max_sbals); - /* set storage-block type for current SBAL */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); + /* set storage-block type for this request */ + sbale = zfcp_qdio_sbale_req(fsf_req); sbale->flags |= sbtype; - /* process all segements of scatter-gather list */ - for_each_sg(sgl, sg_segment, sg_count, sg_index) { - retval = zfcp_qdio_sbals_from_segment( - fsf_req, - sbtype, - zfcp_sg_to_address(sg_segment), - sg_segment->length); - if (retval < 0) { - bytes = retval; - goto out; - } else - bytes += retval; + for (; sg; sg = sg_next(sg)) { + retval = zfcp_qdio_fill_sbals(fsf_req, sbtype, sg_virt(sg), + sg->length); + if (retval < 0) + return retval; + bytes += sg->length; } + /* assume that no other SBALEs are to follow in the same SBAL */ sbale = zfcp_qdio_sbale_curr(fsf_req); sbale->flags |= SBAL_FLAGS_LAST_ENTRY; -out: + return bytes; } - /** - * zfcp_qdio_sbals_from_scsicmnd - fill SBALs from scsi command - * @fsf_req: request to be processed - * @sbtype: SBALE flags - * @scsi_cmnd: either scatter-gather list or buffer contained herein is used - * to fill SBALs + * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO + * @fsf_req: pointer to struct zfcp_fsf_req + * Returns: 0 on success, error otherwise */ -int -zfcp_qdio_sbals_from_scsicmnd(struct zfcp_fsf_req *fsf_req, - unsigned long sbtype, struct scsi_cmnd *scsi_cmnd) +int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req) { - return zfcp_qdio_sbals_from_sg(fsf_req, sbtype, scsi_sglist(scsi_cmnd), - scsi_sg_count(scsi_cmnd), - ZFCP_MAX_SBALS_PER_REQ); + struct zfcp_adapter *adapter = fsf_req->adapter; + struct zfcp_qdio_queue *req_q = &adapter->req_q; + int first = fsf_req->sbal_first; + int count = fsf_req->sbal_number; + int retval, pci, pci_batch; + volatile struct qdio_buffer_element *sbale; + + /* acknowledgements for transferred buffers */ + pci_batch = req_q->pci_batch + count; + if (unlikely(pci_batch >= ZFCP_QDIO_PCI_INTERVAL)) { + pci_batch %= ZFCP_QDIO_PCI_INTERVAL; + pci = first + count - (pci_batch + 1); + pci %= QDIO_MAX_BUFFERS_PER_Q; + sbale = zfcp_qdio_sbale(req_q, pci, 0); + sbale->flags |= SBAL_FLAGS0_PCI; + } + + retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, first, + count, NULL); + if (unlikely(retval)) { + zfcp_qdio_zero_sbals(req_q->sbal, first, count); + return retval; + } + + /* account for transferred buffers */ + atomic_sub(count, &req_q->count); + req_q->first += count; + req_q->first %= QDIO_MAX_BUFFERS_PER_Q; + req_q->pci_batch = pci_batch; + return 0; } /** - * zfcp_qdio_determine_pci - set PCI flag in first SBALE on qdio queue if needed + * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data + * @adapter: pointer to struct zfcp_adapter + * Returns: -ENOMEM on memory allocation error or return value from + * qdio_allocate */ -int -zfcp_qdio_determine_pci(struct zfcp_qdio_queue *req_queue, - struct zfcp_fsf_req *fsf_req) +int zfcp_qdio_allocate(struct zfcp_adapter *adapter) { - int new_distance_from_int; - int pci_pos; - volatile struct qdio_buffer_element *sbale; + struct qdio_initialize *init_data; - new_distance_from_int = req_queue->distance_from_int + - fsf_req->sbal_number; - - if (unlikely(new_distance_from_int >= ZFCP_QDIO_PCI_INTERVAL)) { - new_distance_from_int %= ZFCP_QDIO_PCI_INTERVAL; - pci_pos = fsf_req->sbal_first; - pci_pos += fsf_req->sbal_number; - pci_pos -= new_distance_from_int; - pci_pos -= 1; - pci_pos %= QDIO_MAX_BUFFERS_PER_Q; - sbale = zfcp_qdio_sbale_req(fsf_req, pci_pos, 0); - sbale->flags |= SBAL_FLAGS0_PCI; - } - return new_distance_from_int; + if (zfcp_qdio_buffers_enqueue(adapter->req_q.sbal) || + zfcp_qdio_buffers_enqueue(adapter->resp_q.sbal)) + return -ENOMEM; + + init_data = &adapter->qdio_init_data; + + init_data->cdev = adapter->ccw_device; + init_data->q_format = QDIO_ZFCP_QFMT; + memcpy(init_data->adapter_name, zfcp_get_busid_by_adapter(adapter), 8); + ASCEBC(init_data->adapter_name, 8); + init_data->qib_param_field_format = 0; + init_data->qib_param_field = NULL; + init_data->input_slib_elements = NULL; + init_data->output_slib_elements = NULL; + init_data->min_input_threshold = 1; + init_data->max_input_threshold = 5000; + init_data->min_output_threshold = 1; + init_data->max_output_threshold = 1000; + init_data->no_input_qs = 1; + init_data->no_output_qs = 1; + init_data->input_handler = zfcp_qdio_int_resp; + init_data->output_handler = zfcp_qdio_int_req; + init_data->int_parm = (unsigned long) adapter; + init_data->flags = QDIO_INBOUND_0COPY_SBALS | + QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; + init_data->input_sbal_addr_array = + (void **) (adapter->resp_q.sbal); + init_data->output_sbal_addr_array = + (void **) (adapter->req_q.sbal); + + return qdio_allocate(init_data); } -/* - * function: zfcp_zero_sbals - * - * purpose: zeros specified range of SBALs - * - * returns: +/** + * zfcp_close_qdio - close qdio queues for an adapter */ -void -zfcp_qdio_zero_sbals(struct qdio_buffer *buf[], int first, int clean_count) +void zfcp_qdio_close(struct zfcp_adapter *adapter) { - int cur_pos; - int index; - - for (cur_pos = first; cur_pos < (first + clean_count); cur_pos++) { - index = cur_pos % QDIO_MAX_BUFFERS_PER_Q; - memset(buf[index], 0, sizeof (struct qdio_buffer)); - ZFCP_LOG_TRACE("zeroing BUFFER %d at address %p\n", - index, buf[index]); + struct zfcp_qdio_queue *req_q; + int first, count; + + if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) + return; + + /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ + req_q = &adapter->req_q; + spin_lock(&req_q->lock); + atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); + spin_unlock(&req_q->lock); + + while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) + == -EINPROGRESS) + ssleep(1); + + /* cleanup used outbound sbals */ + count = atomic_read(&req_q->count); + if (count < QDIO_MAX_BUFFERS_PER_Q) { + first = (req_q->first + count) % QDIO_MAX_BUFFERS_PER_Q; + count = QDIO_MAX_BUFFERS_PER_Q - count; + zfcp_qdio_zero_sbals(req_q->sbal, first, count); } + req_q->first = 0; + atomic_set(&req_q->count, 0); + req_q->pci_batch = 0; + adapter->resp_q.first = 0; + atomic_set(&adapter->resp_q.count, 0); } -#undef ZFCP_LOG_AREA +/** + * zfcp_qdio_open - prepare and initialize response queue + * @adapter: pointer to struct zfcp_adapter + * Returns: 0 on success, otherwise -EIO + */ +int zfcp_qdio_open(struct zfcp_adapter *adapter) +{ + volatile struct qdio_buffer_element *sbale; + int cc; + + if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) + return -EIO; + + if (qdio_establish(&adapter->qdio_init_data)) { + dev_err(&adapter->ccw_device->dev, + "Establish of QDIO queues failed.\n"); + return -EIO; + } + + if (qdio_activate(adapter->ccw_device, 0)) { + dev_err(&adapter->ccw_device->dev, + "Activate of QDIO queues failed.\n"); + goto failed_qdio; + } + + for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) { + sbale = &(adapter->resp_q.sbal[cc]->element[0]); + sbale->length = 0; + sbale->flags = SBAL_FLAGS_LAST_ENTRY; + sbale->addr = NULL; + } + + if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0, + QDIO_MAX_BUFFERS_PER_Q, NULL)) { + dev_err(&adapter->ccw_device->dev, + "Init of QDIO response queue failed.\n"); + goto failed_qdio; + } + + /* set index of first avalable SBALS / number of available SBALS */ + adapter->req_q.first = 0; + atomic_set(&adapter->req_q.count, QDIO_MAX_BUFFERS_PER_Q); + adapter->req_q.pci_batch = 0; + + return 0; + +failed_qdio: + while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) + == -EINPROGRESS) + ssleep(1); + + return -EIO; +} diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index 0168755..aeae56b 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -1,220 +1,65 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Interface to Linux SCSI midlayer. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI - #include "zfcp_ext.h" #include <asm/atomic.h> -static void zfcp_scsi_slave_destroy(struct scsi_device *sdp); -static int zfcp_scsi_slave_alloc(struct scsi_device *sdp); -static int zfcp_scsi_slave_configure(struct scsi_device *sdp); -static int zfcp_scsi_queuecommand(struct scsi_cmnd *, - void (*done) (struct scsi_cmnd *)); -static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *); -static int zfcp_task_management_function(struct zfcp_unit *, u8, - struct scsi_cmnd *); - -static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, - unsigned int, unsigned int); - -static struct device_attribute *zfcp_sysfs_sdev_attrs[]; -static struct device_attribute *zfcp_a_stats_attrs[]; - -struct zfcp_data zfcp_data = { - .scsi_host_template = { - .name = ZFCP_NAME, - .module = THIS_MODULE, - .proc_name = "zfcp", - .slave_alloc = zfcp_scsi_slave_alloc, - .slave_configure = zfcp_scsi_slave_configure, - .slave_destroy = zfcp_scsi_slave_destroy, - .queuecommand = zfcp_scsi_queuecommand, - .eh_abort_handler = zfcp_scsi_eh_abort_handler, - .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, - .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, - .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, - .can_queue = 4096, - .this_id = -1, - .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, - .cmd_per_lun = 1, - .use_clustering = 1, - .sdev_attrs = zfcp_sysfs_sdev_attrs, - .max_sectors = ZFCP_MAX_SECTORS, - .shost_attrs = zfcp_a_stats_attrs, - }, - .driver_version = ZFCP_VERSION, -}; - -/* Find start of Response Information in FCP response unit*/ -char * -zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) -{ - char *fcp_rsp_info_ptr; - - fcp_rsp_info_ptr = - (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu)); - - return fcp_rsp_info_ptr; -} - /* Find start of Sense Information in FCP response unit*/ -char * -zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) +char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) { char *fcp_sns_info_ptr; - fcp_sns_info_ptr = - (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu)); + fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1]; if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) - fcp_sns_info_ptr = (char *) fcp_sns_info_ptr + - fcp_rsp_iu->fcp_rsp_len; + fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len; return fcp_sns_info_ptr; } -static fcp_dl_t * -zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd) +void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) { - int additional_length = fcp_cmd->add_fcp_cdb_length << 2; - fcp_dl_t *fcp_dl_addr; + fcp_dl_t *fcp_dl_ptr; - fcp_dl_addr = (fcp_dl_t *) - ((unsigned char *) fcp_cmd + - sizeof (struct fcp_cmnd_iu) + additional_length); /* * fcp_dl_addr = start address of fcp_cmnd structure + * size of fixed part + size of dynamically sized add_dcp_cdb field * SEE FCP-2 documentation */ - return fcp_dl_addr; + fcp_dl_ptr = (fcp_dl_t *) ((unsigned char *) &fcp_cmd[1] + + (fcp_cmd->add_fcp_cdb_length << 2)); + *fcp_dl_ptr = fcp_dl; } -fcp_dl_t -zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd) -{ - return *zfcp_get_fcp_dl_ptr(fcp_cmd); -} - -void -zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) -{ - *zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl; -} - -/* - * note: it's a bit-or operation not an assignment - * regarding the specified byte - */ -static inline void -set_byte(int *result, char status, char pos) -{ - *result |= status << (pos * 8); -} - -void -set_host_byte(int *result, char status) -{ - set_byte(result, status, 2); -} - -void -set_driver_byte(int *result, char status) -{ - set_byte(result, status, 3); -} - -static int -zfcp_scsi_slave_alloc(struct scsi_device *sdp) -{ - struct zfcp_adapter *adapter; - struct zfcp_unit *unit; - unsigned long flags; - int retval = -ENXIO; - - adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; - if (!adapter) - goto out; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); - if (unit && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED, - &unit->status)) { - sdp->hostdata = unit; - unit->device = sdp; - zfcp_unit_get(unit); - retval = 0; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - out: - return retval; -} - -/** - * zfcp_scsi_slave_destroy - called when scsi device is removed - * - * Remove reference to associated scsi device for an zfcp_unit. - * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs - * or a scan for this device might have failed. - */ static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) { struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; - + WARN_ON(!unit); if (unit) { atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); sdpnt->hostdata = NULL; unit->device = NULL; zfcp_erp_unit_failed(unit, 12, NULL); zfcp_unit_put(unit); - } else - ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at " - "address %p\n", sdpnt); + } } -/* - * called from scsi midlayer to allow finetuning of a device. - */ -static int -zfcp_scsi_slave_configure(struct scsi_device *sdp) +static int zfcp_scsi_slave_configure(struct scsi_device *sdp) { if (sdp->tagged_supported) - scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, ZFCP_CMND_PER_LUN); + scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32); else scsi_adjust_queue_depth(sdp, 0, 1); return 0; } -/** - * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function - * @scpnt: pointer to struct scsi_cmnd where result is set - * @result: result to be set in scpnt (e.g. DID_ERROR) - */ -static void -zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) +static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) { - set_host_byte(&scpnt->result, result); + set_host_byte(scpnt, result); if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) zfcp_scsi_dbf_event_result("fail", 4, (struct zfcp_adapter*) scpnt->device->host->hostdata[0], @@ -223,114 +68,13 @@ zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) scpnt->scsi_done(scpnt); } -/** - * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and - * zfcp_scsi_command_sync - * @adapter: adapter where scsi command is issued - * @unit: unit to which scsi command is sent - * @scpnt: scsi command to be sent - * @timer: timer to be started if request is successfully initiated - * - * Note: In scsi_done function must be set in scpnt. - */ -int -zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, - struct scsi_cmnd *scpnt, int use_timer) -{ - int tmp; - int retval; - - retval = 0; - - BUG_ON((adapter == NULL) || (adapter != unit->port->adapter)); - BUG_ON(scpnt->scsi_done == NULL); - - if (unlikely(NULL == unit)) { - zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); - goto out; - } - - if (unlikely( - atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) || - !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) { - ZFCP_LOG_DEBUG("stopping SCSI I/O on unit 0x%016Lx on port " - "0x%016Lx on adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); - zfcp_scsi_command_fail(scpnt, DID_ERROR); - goto out; - } - - tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer, - ZFCP_REQ_AUTO_CLEANUP); - if (unlikely(tmp == -EBUSY)) { - ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx " - "on port 0x%016Lx in recovery\n", - zfcp_get_busid_by_unit(unit), - unit->fcp_lun, unit->port->wwpn); - zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); - goto out; - } - - if (unlikely(tmp < 0)) { - ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n"); - retval = SCSI_MLQUEUE_HOST_BUSY; - } - -out: - return retval; -} - -static void -zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt) -{ - struct completion *wait = (struct completion *) scpnt->SCp.ptr; - complete(wait); -} - - -/** - * zfcp_scsi_command_sync - send a SCSI command and wait for completion - * @unit: unit where command is sent to - * @scpnt: scsi command to be sent - * @use_timer: indicates whether timer should be setup or not - * Return: 0 - * - * Errors are indicated in scpnt->result - */ -int -zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt, - int use_timer) -{ - int ret; - DECLARE_COMPLETION_ONSTACK(wait); - - scpnt->SCp.ptr = (void *) &wait; /* silent re-use */ - scpnt->scsi_done = zfcp_scsi_command_sync_handler; - ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, - use_timer); - if (ret == 0) - wait_for_completion(&wait); - - scpnt->SCp.ptr = NULL; - - return 0; -} - -/* - * function: zfcp_scsi_queuecommand - * - * purpose: enqueues a SCSI command to the specified target device - * - * returns: 0 - success, SCSI command enqueued - * !0 - failure - */ -static int -zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, - void (*done) (struct scsi_cmnd *)) +static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, + void (*done) (struct scsi_cmnd *)) { struct zfcp_unit *unit; struct zfcp_adapter *adapter; + int status; + int ret; /* reset the status for this request */ scpnt->result = 0; @@ -342,44 +86,76 @@ zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, * (stored there by zfcp_scsi_slave_alloc) */ adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; - unit = (struct zfcp_unit *) scpnt->device->hostdata; + unit = scpnt->device->hostdata; + + BUG_ON(!adapter || (adapter != unit->port->adapter)); + BUG_ON(!scpnt->scsi_done); - return zfcp_scsi_command_async(adapter, unit, scpnt, 0); + if (unlikely(!unit)) { + zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); + return 0; + } + + status = atomic_read(&unit->status); + if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || + !(status & ZFCP_STATUS_COMMON_RUNNING))) { + zfcp_scsi_command_fail(scpnt, DID_ERROR); + return 0;; + } + + ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0, + ZFCP_REQ_AUTO_CLEANUP); + if (unlikely(ret == -EBUSY)) + zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); + else if (unlikely(ret < 0)) + return SCSI_MLQUEUE_HOST_BUSY; + + return ret; } -static struct zfcp_unit * -zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id, - unsigned int lun) +static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, + int channel, unsigned int id, + unsigned int lun) { struct zfcp_port *port; - struct zfcp_unit *unit, *retval = NULL; + struct zfcp_unit *unit; list_for_each_entry(port, &adapter->port_list_head, list) { if (!port->rport || (id != port->rport->scsi_target_id)) continue; list_for_each_entry(unit, &port->unit_list_head, list) - if (lun == unit->scsi_lun) { - retval = unit; - goto out; - } + if (lun == unit->scsi_lun) + return unit; } - out: + + return NULL; +} + +static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) +{ + struct zfcp_adapter *adapter; + struct zfcp_unit *unit; + unsigned long flags; + int retval = -ENXIO; + + adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; + if (!adapter) + goto out; + + read_lock_irqsave(&zfcp_data.config_lock, flags); + unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); + if (unit && + (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) { + sdp->hostdata = unit; + unit->device = sdp; + zfcp_unit_get(unit); + retval = 0; + } + read_unlock_irqrestore(&zfcp_data.config_lock, flags); +out: return retval; } -/** - * zfcp_scsi_eh_abort_handler - abort the specified SCSI command - * @scpnt: pointer to scsi_cmnd to be aborted - * Return: SUCCESS - command has been aborted and cleaned up in internal - * bookkeeping, SCSI stack won't be called for aborted command - * FAILED - otherwise - * - * We do not need to care for a SCSI command which completes normally - * but late during this abort routine runs. We are allowed to return - * late commands to the SCSI stack. It tracks the state of commands and - * will handle late commands. (Usually, the normal completion of late - * commands is ignored with respect to the running abort operation.) - */ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) { struct Scsi_Host *scsi_host; @@ -387,44 +163,37 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) struct zfcp_unit *unit; struct zfcp_fsf_req *fsf_req; unsigned long flags; - unsigned long old_req_id; + unsigned long old_req_id = (unsigned long) scpnt->host_scribble; int retval = SUCCESS; scsi_host = scpnt->device->host; adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - unit = (struct zfcp_unit *) scpnt->device->hostdata; - - ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n", - scpnt, zfcp_get_busid_by_adapter(adapter)); + unit = scpnt->device->hostdata; /* avoid race condition between late normal completion and abort */ write_lock_irqsave(&adapter->abort_lock, flags); /* Check whether corresponding fsf_req is still pending */ spin_lock(&adapter->req_list_lock); - fsf_req = zfcp_reqlist_find(adapter, - (unsigned long) scpnt->host_scribble); + fsf_req = zfcp_reqlist_find(adapter, old_req_id); spin_unlock(&adapter->req_list_lock); if (!fsf_req) { write_unlock_irqrestore(&adapter->abort_lock, flags); zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0); - retval = SUCCESS; - goto out; + return retval; } - fsf_req->data = 0; + fsf_req->data = NULL; fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; - old_req_id = fsf_req->req_id; /* don't access old fsf_req after releasing the abort_lock */ write_unlock_irqrestore(&adapter->abort_lock, flags); fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0); if (!fsf_req) { - ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n"); zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, old_req_id); retval = FAILED; - goto out; + return retval; } __wait_event(fsf_req->completion_wq, @@ -432,66 +201,29 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0); - retval = SUCCESS; } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0); - retval = SUCCESS; } else { zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0); retval = FAILED; } zfcp_fsf_req_free(fsf_req); - out: - return retval; -} - -static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) -{ - int retval; - struct zfcp_unit *unit = scpnt->device->hostdata; - if (!unit) { - WARN_ON(1); - return SUCCESS; - } - retval = zfcp_task_management_function(unit, - FCP_LOGICAL_UNIT_RESET, - scpnt); - return retval ? FAILED : SUCCESS; -} - -static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) -{ - int retval; - struct zfcp_unit *unit = scpnt->device->hostdata; - - if (!unit) { - WARN_ON(1); - return SUCCESS; - } - retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt); - return retval ? FAILED : SUCCESS; + return retval; } -static int -zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, - struct scsi_cmnd *scpnt) +static int zfcp_task_mgmt_function(struct zfcp_unit *unit, u8 tm_flags, + struct scsi_cmnd *scpnt) { struct zfcp_adapter *adapter = unit->port->adapter; struct zfcp_fsf_req *fsf_req; - int retval = 0; + int retval = SUCCESS; /* issue task management function */ - fsf_req = zfcp_fsf_send_fcp_command_task_management - (adapter, unit, tm_flags, 0); + fsf_req = zfcp_fsf_send_fcp_ctm(adapter, unit, tm_flags, 0); if (!fsf_req) { - ZFCP_LOG_INFO("error: creation of task management request " - "failed for unit 0x%016Lx on port 0x%016Lx on " - "adapter %s\n", unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(adapter)); zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt); - retval = -ENOMEM; - goto out; + return FAILED; } __wait_event(fsf_req->completion_wq, @@ -502,87 +234,90 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, */ if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); - retval = -EIO; + retval = FAILED; } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); - retval = -ENOTSUPP; + retval = FAILED; } else zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); zfcp_fsf_req_free(fsf_req); - out: + return retval; } -/** - * zfcp_scsi_eh_host_reset_handler - handler for host reset - */ +static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) +{ + struct zfcp_unit *unit = scpnt->device->hostdata; + + if (!unit) { + WARN_ON(1); + return SUCCESS; + } + return zfcp_task_mgmt_function(unit, FCP_LOGICAL_UNIT_RESET, scpnt); +} + +static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) +{ + struct zfcp_unit *unit = scpnt->device->hostdata; + + if (!unit) { + WARN_ON(1); + return SUCCESS; + } + return zfcp_task_mgmt_function(unit, FCP_TARGET_RESET, scpnt); +} + static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { struct zfcp_unit *unit; struct zfcp_adapter *adapter; - unit = (struct zfcp_unit*) scpnt->device->hostdata; + unit = scpnt->device->hostdata; adapter = unit->port->adapter; - - ZFCP_LOG_NORMAL("host reset because of problems with " - "unit 0x%016Lx on port 0x%016Lx, adapter %s\n", - unit->fcp_lun, unit->port->wwpn, - zfcp_get_busid_by_adapter(unit->port->adapter)); - zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt); zfcp_erp_wait(adapter); return SUCCESS; } -int -zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) +int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) { - int retval = 0; - static unsigned int unique_id = 0; + struct ccw_dev_id dev_id; if (adapter->scsi_host) - goto out; + return 0; + ccw_device_get_id(adapter->ccw_device, &dev_id); /* register adapter as SCSI host with mid layer of SCSI stack */ adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, sizeof (struct zfcp_adapter *)); if (!adapter->scsi_host) { - ZFCP_LOG_NORMAL("error: registration with SCSI stack failed " - "for adapter %s ", - zfcp_get_busid_by_adapter(adapter)); - retval = -EIO; - goto out; + dev_err(&adapter->ccw_device->dev, + "registration with SCSI stack failed."); + return -EIO; } - ZFCP_LOG_DEBUG("host registered, scsi_host=%p\n", adapter->scsi_host); /* tell the SCSI stack some characteristics of this adapter */ adapter->scsi_host->max_id = 1; adapter->scsi_host->max_lun = 1; adapter->scsi_host->max_channel = 0; - adapter->scsi_host->unique_id = unique_id++; /* FIXME */ - adapter->scsi_host->max_cmd_len = ZFCP_MAX_SCSI_CMND_LENGTH; + adapter->scsi_host->unique_id = dev_id.devno; + adapter->scsi_host->max_cmd_len = 255; adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; - /* - * save a pointer to our own adapter data structure within - * hostdata field of SCSI host data structure - */ adapter->scsi_host->hostdata[0] = (unsigned long) adapter; if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { scsi_host_put(adapter->scsi_host); - retval = -EIO; - goto out; + return -EIO; } atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status); - out: - return retval; + + return 0; } -void -zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) +void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) { struct Scsi_Host *shost; struct zfcp_port *port; @@ -590,10 +325,12 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) shost = adapter->scsi_host; if (!shost) return; + read_lock_irq(&zfcp_data.config_lock); list_for_each_entry(port, &adapter->port_list_head, list) if (port->rport) port->rport = NULL; + read_unlock_irq(&zfcp_data.config_lock); fc_remove_host(shost); scsi_remove_host(shost); @@ -604,9 +341,6 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) return; } -/* - * Support functions for FC transport class - */ static struct fc_host_statistics* zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) { @@ -622,13 +356,12 @@ zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) return adapter->fc_stats; } -static void -zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, - struct fsf_qtcb_bottom_port *data, - struct fsf_qtcb_bottom_port *old) +static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, + struct fsf_qtcb_bottom_port *data, + struct fsf_qtcb_bottom_port *old) { - fc_stats->seconds_since_last_reset = data->seconds_since_last_reset - - old->seconds_since_last_reset; + fc_stats->seconds_since_last_reset = + data->seconds_since_last_reset - old->seconds_since_last_reset; fc_stats->tx_frames = data->tx_frames - old->tx_frames; fc_stats->tx_words = data->tx_words - old->tx_words; fc_stats->rx_frames = data->rx_frames - old->rx_frames; @@ -639,26 +372,25 @@ zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; fc_stats->link_failure_count = data->link_failure - old->link_failure; fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; - fc_stats->loss_of_signal_count = data->loss_of_signal - - old->loss_of_signal; - fc_stats->prim_seq_protocol_err_count = data->psp_error_counts - - old->psp_error_counts; - fc_stats->invalid_tx_word_count = data->invalid_tx_words - - old->invalid_tx_words; + fc_stats->loss_of_signal_count = + data->loss_of_signal - old->loss_of_signal; + fc_stats->prim_seq_protocol_err_count = + data->psp_error_counts - old->psp_error_counts; + fc_stats->invalid_tx_word_count = + data->invalid_tx_words - old->invalid_tx_words; fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; - fc_stats->fcp_input_requests = data->input_requests - - old->input_requests; - fc_stats->fcp_output_requests = data->output_requests - - old->output_requests; - fc_stats->fcp_control_requests = data->control_requests - - old->control_requests; + fc_stats->fcp_input_requests = + data->input_requests - old->input_requests; + fc_stats->fcp_output_requests = + data->output_requests - old->output_requests; + fc_stats->fcp_control_requests = + data->control_requests - old->control_requests; fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; } -static void -zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, - struct fsf_qtcb_bottom_port *data) +static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, + struct fsf_qtcb_bottom_port *data) { fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; fc_stats->tx_frames = data->tx_frames; @@ -682,22 +414,14 @@ zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, fc_stats->fcp_output_megabytes = data->output_mb; } -/** - * zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc - * - * assumption: scsi_transport_fc synchronizes calls of - * get_fc_host_stats and reset_fc_host_stats - * (XXX to be checked otherwise introduce locking) - */ -static struct fc_host_statistics * -zfcp_get_fc_host_stats(struct Scsi_Host *shost) +static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) { struct zfcp_adapter *adapter; struct fc_host_statistics *fc_stats; struct fsf_qtcb_bottom_port *data; int ret; - adapter = (struct zfcp_adapter *)shost->hostdata[0]; + adapter = (struct zfcp_adapter *)host->hostdata[0]; fc_stats = zfcp_init_fc_host_stats(adapter); if (!fc_stats) return NULL; @@ -709,26 +433,25 @@ zfcp_get_fc_host_stats(struct Scsi_Host *shost) ret = zfcp_fsf_exchange_port_data_sync(adapter, data); if (ret) { kfree(data); - return NULL; /* XXX return zeroed fc_stats? */ + return NULL; } if (adapter->stats_reset && ((jiffies/HZ - adapter->stats_reset) < - data->seconds_since_last_reset)) { + data->seconds_since_last_reset)) zfcp_adjust_fc_host_stats(fc_stats, data, adapter->stats_reset_data); - } else + else zfcp_set_fc_host_stats(fc_stats, data); kfree(data); return fc_stats; } -static void -zfcp_reset_fc_host_stats(struct Scsi_Host *shost) +static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) { struct zfcp_adapter *adapter; - struct fsf_qtcb_bottom_port *data, *old_data; + struct fsf_qtcb_bottom_port *data; int ret; adapter = (struct zfcp_adapter *)shost->hostdata[0]; @@ -737,17 +460,33 @@ zfcp_reset_fc_host_stats(struct Scsi_Host *shost) return; ret = zfcp_fsf_exchange_port_data_sync(adapter, data); - if (ret) { + if (ret) kfree(data); - } else { + else { adapter->stats_reset = jiffies/HZ; - old_data = adapter->stats_reset_data; + kfree(adapter->stats_reset_data); adapter->stats_reset_data = data; /* finally freed in - adater_dequeue */ - kfree(old_data); + adapter_dequeue */ } } +static void zfcp_get_host_port_state(struct Scsi_Host *shost) +{ + struct zfcp_adapter *adapter = + (struct zfcp_adapter *)shost->hostdata[0]; + int status = atomic_read(&adapter->status); + + if ((status & ZFCP_STATUS_COMMON_RUNNING) && + !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) + fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; + else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) + fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; + else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) + fc_host_port_state(shost) = FC_PORTSTATE_ERROR; + else + fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; +} + static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) { rport->dev_loss_tmo = timeout; @@ -770,6 +509,8 @@ struct fc_function_template zfcp_transport_functions = { .get_fc_host_stats = zfcp_get_fc_host_stats, .reset_fc_host_stats = zfcp_reset_fc_host_stats, .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, + .get_host_port_state = zfcp_get_host_port_state, + .show_host_port_state = 1, /* no functions registered for following dynamic attributes but directly set by LLDD */ .show_host_port_type = 1, @@ -778,149 +519,26 @@ struct fc_function_template zfcp_transport_functions = { .disable_target_scan = 1, }; -/** - * ZFCP_DEFINE_SCSI_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attribute for a unit. - */ -#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct scsi_device *sdev; \ - struct zfcp_unit *unit; \ - \ - sdev = to_scsi_device(dev); \ - unit = sdev->hostdata; \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); - -ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", zfcp_get_busid_by_unit(unit)); -ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn); -ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun); - -static struct device_attribute *zfcp_sysfs_sdev_attrs[] = { - &dev_attr_fcp_lun, - &dev_attr_wwpn, - &dev_attr_hba_id, - NULL -}; - -static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct Scsi_Host *scsi_host = dev_to_shost(dev); - struct fsf_qtcb_bottom_port *qtcb_port; - int retval; - struct zfcp_adapter *adapter; - - adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) - return -EOPNOTSUPP; - - qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL); - if (!qtcb_port) - return -ENOMEM; - - retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port); - if (!retval) - retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util, - qtcb_port->cb_util, qtcb_port->a_util); - kfree(qtcb_port); - return retval; -} - -static int zfcp_sysfs_adapter_ex_config(struct device *dev, - struct fsf_statistics_info *stat_inf) -{ - int retval; - struct fsf_qtcb_bottom_config *qtcb_config; - struct Scsi_Host *scsi_host = dev_to_shost(dev); - struct zfcp_adapter *adapter; - - adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) - return -EOPNOTSUPP; - - qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config), - GFP_KERNEL); - if (!qtcb_config) - return -ENOMEM; - - retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config); - if (!retval) - *stat_inf = qtcb_config->stat_info; - - kfree(qtcb_config); - return retval; -} - -static ssize_t zfcp_sysfs_adapter_request_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct fsf_statistics_info stat_info; - int retval; - - retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); - if (retval) - return retval; - - return sprintf(buf, "%llu %llu %llu\n", - (unsigned long long) stat_info.input_req, - (unsigned long long) stat_info.output_req, - (unsigned long long) stat_info.control_req); -} - -static ssize_t zfcp_sysfs_adapter_mb_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct fsf_statistics_info stat_info; - int retval; - - retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); - if (retval) - return retval; - - return sprintf(buf, "%llu %llu\n", - (unsigned long long) stat_info.input_mb, - (unsigned long long) stat_info.output_mb); -} - -static ssize_t zfcp_sysfs_adapter_sec_active_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct fsf_statistics_info stat_info; - int retval; - - retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); - if (retval) - return retval; - - return sprintf(buf, "%llu\n", - (unsigned long long) stat_info.seconds_act); -} - -static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL); -static DEVICE_ATTR(requests, S_IRUGO, zfcp_sysfs_adapter_request_show, NULL); -static DEVICE_ATTR(megabytes, S_IRUGO, zfcp_sysfs_adapter_mb_show, NULL); -static DEVICE_ATTR(seconds_active, S_IRUGO, - zfcp_sysfs_adapter_sec_active_show, NULL); - -static struct device_attribute *zfcp_a_stats_attrs[] = { - &dev_attr_utilization, - &dev_attr_requests, - &dev_attr_megabytes, - &dev_attr_seconds_active, - NULL +struct zfcp_data zfcp_data = { + .scsi_host_template = { + .name = "zfcp", + .module = THIS_MODULE, + .proc_name = "zfcp", + .slave_alloc = zfcp_scsi_slave_alloc, + .slave_configure = zfcp_scsi_slave_configure, + .slave_destroy = zfcp_scsi_slave_destroy, + .queuecommand = zfcp_scsi_queuecommand, + .eh_abort_handler = zfcp_scsi_eh_abort_handler, + .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, + .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, + .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, + .can_queue = 4096, + .this_id = -1, + .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, + .cmd_per_lun = 1, + .use_clustering = 1, + .sdev_attrs = zfcp_sysfs_sdev_attrs, + .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), + .shost_attrs = zfcp_sysfs_shost_attrs, + }, }; - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c new file mode 100644 index 0000000..2e85c6c --- /dev/null +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -0,0 +1,496 @@ +/* + * zfcp device driver + * + * sysfs attributes. + * + * Copyright IBM Corporation 2008 + */ + +#include "zfcp_ext.h" + +#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \ +struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\ + _show, _store) +#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \ +static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \ + struct device_attribute *at,\ + char *buf) \ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + \ + return sprintf(buf, _format, _value); \ +} \ +static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \ + zfcp_sysfs_##_feat##_##_name##_show, NULL); + +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n", + atomic_read(&adapter->status)); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n", + adapter->peer_wwnn); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n", + adapter->peer_wwpn); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n", + adapter->peer_d_id); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n", + adapter->hydra_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n", + adapter->fsf_lic_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n", + adapter->hardware_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n", + (atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); + +ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n", + atomic_read(&port->status)); +ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n", + (atomic_read(&port->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); +ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n", + (atomic_read(&port->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); + +ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n", + atomic_read(&unit->status)); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_SHARED) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_READONLY) != 0); + +#define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id) \ +static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + \ + if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED) \ + return sprintf(buf, "1\n"); \ + else \ + return sprintf(buf, "0\n"); \ +} \ +static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \ + struct device_attribute *attr,\ + const char *buf, size_t count)\ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + unsigned long val; \ + int retval = 0; \ + \ + down(&zfcp_data.config_sema); \ + if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \ + retval = -EBUSY; \ + goto out; \ + } \ + \ + if (strict_strtoul(buf, 0, &val) || val != 0) { \ + retval = -EINVAL; \ + goto out; \ + } \ + \ + zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL, \ + ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\ + zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED, \ + _reopen_id, NULL); \ + zfcp_erp_wait(_adapter); \ +out: \ + up(&zfcp_data.config_sema); \ + return retval ? retval : (ssize_t) count; \ +} \ +static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \ + zfcp_sysfs_##_feat##_failed_show, \ + zfcp_sysfs_##_feat##_failed_store); + +ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, 44, 93); +ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, 45, 96); +ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, 46, 97); + +static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter = dev_get_drvdata(dev); + int ret; + + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) + return -EBUSY; + + ret = zfcp_scan_ports(adapter); + return ret ? ret : (ssize_t) count; +} +static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL, + zfcp_sysfs_port_rescan_store); + +static ssize_t zfcp_sysfs_port_remove_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter = dev_get_drvdata(dev); + struct zfcp_port *port; + wwn_t wwpn; + int retval = 0; + + down(&zfcp_data.config_sema); + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &wwpn)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + port = zfcp_get_port_by_wwpn(adapter, wwpn); + if (port && (atomic_read(&port->refcount) == 0)) { + zfcp_port_get(port); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + list_move(&port->list, &adapter->port_remove_lh); + } else + port = NULL; + write_unlock_irq(&zfcp_data.config_lock); + + if (!port) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_port_shutdown(port, 0, 92, NULL); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); + out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL, + zfcp_sysfs_port_remove_store); + +static struct attribute *zfcp_adapter_attrs[] = { + &dev_attr_adapter_failed.attr, + &dev_attr_adapter_in_recovery.attr, + &dev_attr_adapter_port_remove.attr, + &dev_attr_adapter_port_rescan.attr, + &dev_attr_adapter_peer_wwnn.attr, + &dev_attr_adapter_peer_wwpn.attr, + &dev_attr_adapter_peer_d_id.attr, + &dev_attr_adapter_card_version.attr, + &dev_attr_adapter_lic_version.attr, + &dev_attr_adapter_status.attr, + &dev_attr_adapter_hardware_version.attr, + NULL +}; + +struct attribute_group zfcp_sysfs_adapter_attrs = { + .attrs = zfcp_adapter_attrs, +}; + +static ssize_t zfcp_sysfs_unit_add_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_unit *unit; + fcp_lun_t fcp_lun; + int retval = -EINVAL; + + down(&zfcp_data.config_sema); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &fcp_lun)) + goto out; + + unit = zfcp_unit_enqueue(port, fcp_lun); + if (IS_ERR(unit)) + goto out; + + retval = 0; + + zfcp_erp_unit_reopen(unit, 0, 94, NULL); + zfcp_erp_wait(unit->port->adapter); + zfcp_unit_put(unit); +out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store); + +static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_unit *unit; + fcp_lun_t fcp_lun; + int retval = 0; + + down(&zfcp_data.config_sema); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &fcp_lun)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + unit = zfcp_get_unit_by_lun(port, fcp_lun); + if (unit && (atomic_read(&unit->refcount) == 0)) { + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); + list_move(&unit->list, &port->unit_remove_lh); + } else + unit = NULL; + + write_unlock_irq(&zfcp_data.config_lock); + + if (!unit) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_unit_shutdown(unit, 0, 95, NULL); + zfcp_erp_wait(unit->port->adapter); + zfcp_unit_put(unit); + zfcp_unit_dequeue(unit); +out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store); + +static struct attribute *zfcp_port_ns_attrs[] = { + &dev_attr_port_failed.attr, + &dev_attr_port_in_recovery.attr, + &dev_attr_port_status.attr, + &dev_attr_port_access_denied.attr, + NULL +}; + +/** + * zfcp_sysfs_ns_port_attrs - sysfs attributes for nameserver + */ +struct attribute_group zfcp_sysfs_ns_port_attrs = { + .attrs = zfcp_port_ns_attrs, +}; + +static struct attribute *zfcp_port_no_ns_attrs[] = { + &dev_attr_unit_add.attr, + &dev_attr_unit_remove.attr, + &dev_attr_port_failed.attr, + &dev_attr_port_in_recovery.attr, + &dev_attr_port_status.attr, + &dev_attr_port_access_denied.attr, + NULL +}; + +/** + * zfcp_sysfs_port_attrs - sysfs attributes for all other ports + */ +struct attribute_group zfcp_sysfs_port_attrs = { + .attrs = zfcp_port_no_ns_attrs, +}; + +static struct attribute *zfcp_unit_attrs[] = { + &dev_attr_unit_failed.attr, + &dev_attr_unit_in_recovery.attr, + &dev_attr_unit_status.attr, + &dev_attr_unit_access_denied.attr, + &dev_attr_unit_access_shared.attr, + &dev_attr_unit_access_readonly.attr, + NULL +}; + +struct attribute_group zfcp_sysfs_unit_attrs = { + .attrs = zfcp_unit_attrs, +}; + +#define ZFCP_DEFINE_LATENCY_ATTR(_name) \ +static ssize_t \ +zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) { \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + struct zfcp_latencies *lat = &unit->latencies; \ + struct zfcp_adapter *adapter = unit->port->adapter; \ + unsigned long flags; \ + unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \ + \ + spin_lock_irqsave(&lat->lock, flags); \ + fsum = lat->_name.fabric.sum * adapter->timer_ticks; \ + fmin = lat->_name.fabric.min * adapter->timer_ticks; \ + fmax = lat->_name.fabric.max * adapter->timer_ticks; \ + csum = lat->_name.channel.sum * adapter->timer_ticks; \ + cmin = lat->_name.channel.min * adapter->timer_ticks; \ + cmax = lat->_name.channel.max * adapter->timer_ticks; \ + cc = lat->_name.counter; \ + spin_unlock_irqrestore(&lat->lock, flags); \ + \ + do_div(fsum, 1000); \ + do_div(fmin, 1000); \ + do_div(fmax, 1000); \ + do_div(csum, 1000); \ + do_div(cmin, 1000); \ + do_div(cmax, 1000); \ + \ + return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \ + fmin, fmax, fsum, cmin, cmax, csum, cc); \ +} \ +static ssize_t \ +zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + struct zfcp_latencies *lat = &unit->latencies; \ + unsigned long flags; \ + \ + spin_lock_irqsave(&lat->lock, flags); \ + lat->_name.fabric.sum = 0; \ + lat->_name.fabric.min = 0xFFFFFFFF; \ + lat->_name.fabric.max = 0; \ + lat->_name.channel.sum = 0; \ + lat->_name.channel.min = 0xFFFFFFFF; \ + lat->_name.channel.max = 0; \ + lat->_name.counter = 0; \ + spin_unlock_irqrestore(&lat->lock, flags); \ + \ + return (ssize_t) count; \ +} \ +static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \ + zfcp_sysfs_unit_##_name##_latency_show, \ + zfcp_sysfs_unit_##_name##_latency_store); + +ZFCP_DEFINE_LATENCY_ATTR(read); +ZFCP_DEFINE_LATENCY_ATTR(write); +ZFCP_DEFINE_LATENCY_ATTR(cmd); + +#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ +static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + \ + return sprintf(buf, _format, _value); \ +} \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); + +ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", + unit->port->adapter->ccw_device->dev.bus_id); +ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn); +ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun); + +struct device_attribute *zfcp_sysfs_sdev_attrs[] = { + &dev_attr_fcp_lun, + &dev_attr_wwpn, + &dev_attr_hba_id, + &dev_attr_read_latency, + &dev_attr_write_latency, + &dev_attr_cmd_latency, + NULL +}; + +static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct Scsi_Host *scsi_host = dev_to_shost(dev); + struct fsf_qtcb_bottom_port *qtcb_port; + struct zfcp_adapter *adapter; + int retval; + + adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; + if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) + return -EOPNOTSUPP; + + qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL); + if (!qtcb_port) + return -ENOMEM; + + retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port); + if (!retval) + retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util, + qtcb_port->cb_util, qtcb_port->a_util); + kfree(qtcb_port); + return retval; +} +static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL); + +static int zfcp_sysfs_adapter_ex_config(struct device *dev, + struct fsf_statistics_info *stat_inf) +{ + struct Scsi_Host *scsi_host = dev_to_shost(dev); + struct fsf_qtcb_bottom_config *qtcb_config; + struct zfcp_adapter *adapter; + int retval; + + adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; + if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) + return -EOPNOTSUPP; + + qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config), + GFP_KERNEL); + if (!qtcb_config) + return -ENOMEM; + + retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config); + if (!retval) + *stat_inf = qtcb_config->stat_info; + + kfree(qtcb_config); + return retval; +} + +#define ZFCP_SHOST_ATTR(_name, _format, _arg...) \ +static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ +{ \ + struct fsf_statistics_info stat_info; \ + int retval; \ + \ + retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \ + if (retval) \ + return retval; \ + \ + return sprintf(buf, _format, ## _arg); \ +} \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL); + +ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n", + (unsigned long long) stat_info.input_req, + (unsigned long long) stat_info.output_req, + (unsigned long long) stat_info.control_req); + +ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n", + (unsigned long long) stat_info.input_mb, + (unsigned long long) stat_info.output_mb); + +ZFCP_SHOST_ATTR(seconds_active, "%llu\n", + (unsigned long long) stat_info.seconds_act); + +struct device_attribute *zfcp_sysfs_shost_attrs[] = { + &dev_attr_utilization, + &dev_attr_requests, + &dev_attr_megabytes, + &dev_attr_seconds_active, + NULL +}; diff --git a/drivers/s390/scsi/zfcp_sysfs_adapter.c b/drivers/s390/scsi/zfcp_sysfs_adapter.c deleted file mode 100644 index ccbba4d..0000000 --- a/drivers/s390/scsi/zfcp_sysfs_adapter.c +++ /dev/null @@ -1,270 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * ZFCP_DEFINE_ADAPTER_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attributes for an adapter. - */ -#define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct zfcp_adapter *adapter; \ - \ - adapter = dev_get_drvdata(dev); \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL); - -ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status)); -ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn); -ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn); -ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id); -ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version); -ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version); -ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n", - adapter->hardware_version); -ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)); - -/** - * zfcp_sysfs_port_add_store - add a port to sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "port_add" attribute of an adapter. - */ -static ssize_t -zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - wwn_t wwpn; - char *endp; - struct zfcp_adapter *adapter; - struct zfcp_port *port; - int retval = -EINVAL; - - down(&zfcp_data.config_sema); - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { - retval = -EBUSY; - goto out; - } - - wwpn = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) - goto out; - - port = zfcp_port_enqueue(adapter, wwpn, 0, 0); - if (!port) - goto out; - - retval = 0; - - zfcp_erp_port_reopen(port, 0, 91, NULL); - zfcp_erp_wait(port->adapter); - zfcp_port_put(port); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store); - -/** - * zfcp_sysfs_port_remove_store - remove a port from sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "port_remove" attribute of an adapter. - */ -static ssize_t -zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_adapter *adapter; - struct zfcp_port *port; - wwn_t wwpn; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { - retval = -EBUSY; - goto out; - } - - wwpn = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) { - retval = -EINVAL; - goto out; - } - - write_lock_irq(&zfcp_data.config_lock); - port = zfcp_get_port_by_wwpn(adapter, wwpn); - if (port && (atomic_read(&port->refcount) == 0)) { - zfcp_port_get(port); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); - list_move(&port->list, &adapter->port_remove_lh); - } - else { - port = NULL; - } - write_unlock_irq(&zfcp_data.config_lock); - - if (!port) { - retval = -ENXIO; - goto out; - } - - zfcp_erp_port_shutdown(port, 0, 92, NULL); - zfcp_erp_wait(adapter); - zfcp_port_put(port); - zfcp_port_dequeue(port); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store); - -/** - * zfcp_sysfs_adapter_failed_store - failed state of adapter - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "failed" attribute of an adapter. - * If a "0" gets written to "failed", error recovery will be - * started for the belonging adapter. - */ -static ssize_t -zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct zfcp_adapter *adapter; - unsigned int val; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) { - retval = -EBUSY; - goto out; - } - - val = simple_strtoul(buf, &endp, 0); - if (((endp + 1) < (buf + count)) || (val != 0)) { - retval = -EINVAL; - goto out; - } - - zfcp_erp_modify_adapter_status(adapter, 44, NULL, - ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); - zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 93, - NULL); - zfcp_erp_wait(adapter); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -/** - * zfcp_sysfs_adapter_failed_show - failed state of adapter - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * - * Show function of "failed" attribute of adapter. Will be - * "0" if adapter is working, otherwise "1". - */ -static ssize_t -zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct zfcp_adapter *adapter; - - adapter = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) - return sprintf(buf, "1\n"); - else - return sprintf(buf, "0\n"); -} - -static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show, - zfcp_sysfs_adapter_failed_store); - -static struct attribute *zfcp_adapter_attrs[] = { - &dev_attr_failed.attr, - &dev_attr_in_recovery.attr, - &dev_attr_port_remove.attr, - &dev_attr_port_add.attr, - &dev_attr_peer_wwnn.attr, - &dev_attr_peer_wwpn.attr, - &dev_attr_peer_d_id.attr, - &dev_attr_card_version.attr, - &dev_attr_lic_version.attr, - &dev_attr_status.attr, - &dev_attr_hardware_version.attr, - NULL -}; - -static struct attribute_group zfcp_adapter_attr_group = { - .attrs = zfcp_adapter_attrs, -}; - -/** - * zfcp_sysfs_create_adapter_files - create sysfs adapter files - * @dev: pointer to belonging device - * - * Create all attributes of the sysfs representation of an adapter. - */ -int -zfcp_sysfs_adapter_create_files(struct device *dev) -{ - return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group); -} - -/** - * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files - * @dev: pointer to belonging device - * - * Remove all attributes of the sysfs representation of an adapter. - */ -void -zfcp_sysfs_adapter_remove_files(struct device *dev) -{ - sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group); -} - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs_driver.c b/drivers/s390/scsi/zfcp_sysfs_driver.c deleted file mode 100644 index 651edd5..0000000 --- a/drivers/s390/scsi/zfcp_sysfs_driver.c +++ /dev/null @@ -1,106 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes - * @_name: name of attribute - * @_define: name of ZFCP loglevel define - * - * Generates store function for a sysfs loglevel attribute of zfcp driver. - */ -#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define) \ -static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \ - const char *buf, \ - size_t count) \ -{ \ - unsigned int loglevel; \ - unsigned int new_loglevel; \ - char *endp; \ - \ - new_loglevel = simple_strtoul(buf, &endp, 0); \ - if ((endp + 1) < (buf + count)) \ - return -EINVAL; \ - if (new_loglevel > 3) \ - return -EINVAL; \ - down(&zfcp_data.config_sema); \ - loglevel = atomic_read(&zfcp_data.loglevel); \ - loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2)); \ - loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2); \ - atomic_set(&zfcp_data.loglevel, loglevel); \ - up(&zfcp_data.config_sema); \ - return count; \ -} \ - \ -static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev, \ - char *buf) \ -{ \ - return sprintf(buf,"%d\n", (unsigned int) \ - ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define)); \ -} \ - \ -static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO, \ - zfcp_sysfs_loglevel_##_name##_show, \ - zfcp_sysfs_loglevel_##_name##_store); - -ZFCP_DEFINE_DRIVER_ATTR(other, OTHER); -ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI); -ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF); -ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG); -ZFCP_DEFINE_DRIVER_ATTR(cio, CIO); -ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO); -ZFCP_DEFINE_DRIVER_ATTR(erp, ERP); -ZFCP_DEFINE_DRIVER_ATTR(fc, FC); - -static ssize_t zfcp_sysfs_version_show(struct device_driver *dev, - char *buf) -{ - return sprintf(buf, "%s\n", zfcp_data.driver_version); -} - -static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL); - -static struct attribute *zfcp_driver_attrs[] = { - &driver_attr_loglevel_other.attr, - &driver_attr_loglevel_scsi.attr, - &driver_attr_loglevel_fsf.attr, - &driver_attr_loglevel_config.attr, - &driver_attr_loglevel_cio.attr, - &driver_attr_loglevel_qdio.attr, - &driver_attr_loglevel_erp.attr, - &driver_attr_loglevel_fc.attr, - &driver_attr_version.attr, - NULL -}; - -static struct attribute_group zfcp_driver_attr_group = { - .attrs = zfcp_driver_attrs, -}; - -struct attribute_group *zfcp_driver_attr_groups[] = { - &zfcp_driver_attr_group, - NULL, -}; - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs_port.c b/drivers/s390/scsi/zfcp_sysfs_port.c deleted file mode 100644 index 703c1b5..0000000 --- a/drivers/s390/scsi/zfcp_sysfs_port.c +++ /dev/null @@ -1,295 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * zfcp_sysfs_port_release - gets called when a struct device port is released - * @dev: pointer to belonging device - */ -void -zfcp_sysfs_port_release(struct device *dev) -{ - kfree(dev); -} - -/** - * ZFCP_DEFINE_PORT_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attributes for a port. - */ -#define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct zfcp_port *port; \ - \ - port = dev_get_drvdata(dev); \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL); - -ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status)); -ZFCP_DEFINE_PORT_ATTR(in_recovery, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)); -ZFCP_DEFINE_PORT_ATTR(access_denied, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status)); - -/** - * zfcp_sysfs_unit_add_store - add a unit to sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "unit_add" attribute of a port. - */ -static ssize_t -zfcp_sysfs_unit_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - fcp_lun_t fcp_lun; - char *endp; - struct zfcp_port *port; - struct zfcp_unit *unit; - int retval = -EINVAL; - - down(&zfcp_data.config_sema); - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) { - retval = -EBUSY; - goto out; - } - - fcp_lun = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) - goto out; - - unit = zfcp_unit_enqueue(port, fcp_lun); - if (!unit) - goto out; - - retval = 0; - - zfcp_erp_unit_reopen(unit, 0, 94, NULL); - zfcp_erp_wait(unit->port->adapter); - zfcp_unit_put(unit); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store); - -/** - * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - */ -static ssize_t -zfcp_sysfs_unit_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_port *port; - struct zfcp_unit *unit; - fcp_lun_t fcp_lun; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) { - retval = -EBUSY; - goto out; - } - - fcp_lun = simple_strtoull(buf, &endp, 0); - if ((endp + 1) < (buf + count)) { - retval = -EINVAL; - goto out; - } - - write_lock_irq(&zfcp_data.config_lock); - unit = zfcp_get_unit_by_lun(port, fcp_lun); - if (unit && (atomic_read(&unit->refcount) == 0)) { - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); - list_move(&unit->list, &port->unit_remove_lh); - } - else { - unit = NULL; - } - write_unlock_irq(&zfcp_data.config_lock); - - if (!unit) { - retval = -ENXIO; - goto out; - } - - zfcp_erp_unit_shutdown(unit, 0, 95, NULL); - zfcp_erp_wait(unit->port->adapter); - zfcp_unit_put(unit); - zfcp_unit_dequeue(unit); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store); - -/** - * zfcp_sysfs_port_failed_store - failed state of port - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "failed" attribute of a port. - * If a "0" gets written to "failed", error recovery will be - * started for the belonging port. - */ -static ssize_t -zfcp_sysfs_port_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_port *port; - unsigned int val; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) { - retval = -EBUSY; - goto out; - } - - val = simple_strtoul(buf, &endp, 0); - if (((endp + 1) < (buf + count)) || (val != 0)) { - retval = -EINVAL; - goto out; - } - - zfcp_erp_modify_port_status(port, 45, NULL, - ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); - zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 96, NULL); - zfcp_erp_wait(port->adapter); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -/** - * zfcp_sysfs_port_failed_show - failed state of port - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * - * Show function of "failed" attribute of port. Will be - * "0" if port is working, otherwise "1". - */ -static ssize_t -zfcp_sysfs_port_failed_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct zfcp_port *port; - - port = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) - return sprintf(buf, "1\n"); - else - return sprintf(buf, "0\n"); -} - -static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show, - zfcp_sysfs_port_failed_store); - -/** - * zfcp_port_common_attrs - * sysfs attributes that are common for all kind of fc ports. - */ -static struct attribute *zfcp_port_common_attrs[] = { - &dev_attr_failed.attr, - &dev_attr_in_recovery.attr, - &dev_attr_status.attr, - &dev_attr_access_denied.attr, - NULL -}; - -static struct attribute_group zfcp_port_common_attr_group = { - .attrs = zfcp_port_common_attrs, -}; - -/** - * zfcp_port_no_ns_attrs - * sysfs attributes not to be used for nameserver ports. - */ -static struct attribute *zfcp_port_no_ns_attrs[] = { - &dev_attr_unit_add.attr, - &dev_attr_unit_remove.attr, - NULL -}; - -static struct attribute_group zfcp_port_no_ns_attr_group = { - .attrs = zfcp_port_no_ns_attrs, -}; - -/** - * zfcp_sysfs_port_create_files - create sysfs port files - * @dev: pointer to belonging device - * - * Create all attributes of the sysfs representation of a port. - */ -int -zfcp_sysfs_port_create_files(struct device *dev, u32 flags) -{ - int retval; - - retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group); - - if ((flags & ZFCP_STATUS_PORT_WKA) || retval) - return retval; - - retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group); - if (retval) - sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group); - - return retval; -} - -/** - * zfcp_sysfs_port_remove_files - remove sysfs port files - * @dev: pointer to belonging device - * - * Remove all attributes of the sysfs representation of a port. - */ -void -zfcp_sysfs_port_remove_files(struct device *dev, u32 flags) -{ - sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group); - if (!(flags & ZFCP_STATUS_PORT_WKA)) - sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group); -} - -#undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_sysfs_unit.c b/drivers/s390/scsi/zfcp_sysfs_unit.c deleted file mode 100644 index 80fb2c2..0000000 --- a/drivers/s390/scsi/zfcp_sysfs_unit.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. - * - * (C) Copyright IBM Corp. 2002, 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include "zfcp_ext.h" - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG - -/** - * zfcp_sysfs_unit_release - gets called when a struct device unit is released - * @dev: pointer to belonging device - */ -void -zfcp_sysfs_unit_release(struct device *dev) -{ - kfree(dev); -} - -/** - * ZFCP_DEFINE_UNIT_ATTR - * @_name: name of show attribute - * @_format: format string - * @_value: value to print - * - * Generates attribute for a unit. - */ -#define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value) \ -static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ -{ \ - struct zfcp_unit *unit; \ - \ - unit = dev_get_drvdata(dev); \ - return sprintf(buf, _format, _value); \ -} \ - \ -static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL); - -ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status)); -ZFCP_DEFINE_UNIT_ATTR(in_recovery, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)); -ZFCP_DEFINE_UNIT_ATTR(access_denied, "%d\n", atomic_test_mask - (ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status)); -ZFCP_DEFINE_UNIT_ATTR(access_shared, "%d\n", atomic_test_mask - (ZFCP_STATUS_UNIT_SHARED, &unit->status)); -ZFCP_DEFINE_UNIT_ATTR(access_readonly, "%d\n", atomic_test_mask - (ZFCP_STATUS_UNIT_READONLY, &unit->status)); - -/** - * zfcp_sysfs_unit_failed_store - failed state of unit - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * @count: number of bytes in buffer - * - * Store function of the "failed" attribute of a unit. - * If a "0" gets written to "failed", error recovery will be - * started for the belonging unit. - */ -static ssize_t -zfcp_sysfs_unit_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct zfcp_unit *unit; - unsigned int val; - char *endp; - int retval = 0; - - down(&zfcp_data.config_sema); - unit = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) { - retval = -EBUSY; - goto out; - } - - val = simple_strtoul(buf, &endp, 0); - if (((endp + 1) < (buf + count)) || (val != 0)) { - retval = -EINVAL; - goto out; - } - - zfcp_erp_modify_unit_status(unit, 46, NULL, - ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); - zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, 97, NULL); - zfcp_erp_wait(unit->port->adapter); - out: - up(&zfcp_data.config_sema); - return retval ? retval : (ssize_t) count; -} - -/** - * zfcp_sysfs_unit_failed_show - failed state of unit - * @dev: pointer to belonging device - * @buf: pointer to input buffer - * - * Show function of "failed" attribute of unit. Will be - * "0" if unit is working, otherwise "1". - */ -static ssize_t -zfcp_sysfs_unit_failed_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct zfcp_unit *unit; - - unit = dev_get_drvdata(dev); - if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) - return sprintf(buf, "1\n"); - else - return sprintf(buf, "0\n"); -} - -static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show, - zfcp_sysfs_unit_failed_store); - -static struct attribute *zfcp_unit_attrs[] = { - &dev_attr_failed.attr, - &dev_attr_in_recovery.attr, - &dev_attr_status.attr, - &dev_attr_access_denied.attr, - &dev_attr_access_shared.attr, - &dev_attr_access_readonly.attr, - NULL -}; - -static struct attribute_group zfcp_unit_attr_group = { - .attrs = zfcp_unit_attrs, -}; - -/** - * zfcp_sysfs_create_unit_files - create sysfs unit files - * @dev: pointer to belonging device - * - * Create all attributes of the sysfs representation of a unit. - */ -int -zfcp_sysfs_unit_create_files(struct device *dev) -{ - return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group); -} - -/** - * zfcp_sysfs_remove_unit_files - remove sysfs unit files - * @dev: pointer to belonging device - * - * Remove all attributes of the sysfs representation of a unit. - */ -void -zfcp_sysfs_unit_remove_files(struct device *dev) -{ - sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group); -} - -#undef ZFCP_LOG_AREA diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 81ccbd7..26be540 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -888,6 +888,25 @@ config SCSI_IBMVSCSIS To compile this driver as a module, choose M here: the module will be called ibmvstgt. +config SCSI_IBMVFC + tristate "IBM Virtual FC support" + depends on PPC_PSERIES && SCSI + select SCSI_FC_ATTRS + help + This is the IBM POWER Virtual FC Client + + To compile this driver as a module, choose M here: the + module will be called ibmvfc. + +config SCSI_IBMVFC_TRACE + bool "enable driver internal trace" + depends on SCSI_IBMVFC + default y + help + If you say Y here, the driver will trace all commands issued + to the adapter. Performance impact is minimal. Trace can be + dumped using /sys/class/scsi_host/hostXX/trace. + config SCSI_INITIO tristate "Initio 9100U(W) support" depends on PCI && SCSI @@ -1738,10 +1757,12 @@ config SCSI_SUNESP select SCSI_SPI_ATTRS help This is the driver for the Sun ESP SCSI host adapter. The ESP - chipset is present in most SPARC SBUS-based computers. + chipset is present in most SPARC SBUS-based computers and + supports the Emulex family of ESP SCSI chips (esp100, esp100A, + esp236, fas101, fas236) as well as the Qlogic fas366 SCSI chip. To compile this driver as a module, choose M here: the - module will be called esp. + module will be called sun_esp. config ZFCP tristate "FCP host bus adapter driver for IBM eServer zSeries" @@ -1771,4 +1792,6 @@ endif # SCSI_LOWLEVEL source "drivers/scsi/pcmcia/Kconfig" +source "drivers/scsi/device_handler/Kconfig" + endmenu diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 6c775e3..a814967 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_SCSI_ISCSI_ATTRS) += scsi_transport_iscsi.o obj-$(CONFIG_SCSI_SAS_ATTRS) += scsi_transport_sas.o obj-$(CONFIG_SCSI_SAS_LIBSAS) += libsas/ obj-$(CONFIG_SCSI_SRP_ATTRS) += scsi_transport_srp.o +obj-$(CONFIG_SCSI_DH) += device_handler/ obj-$(CONFIG_ISCSI_TCP) += libiscsi.o iscsi_tcp.o obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o @@ -118,6 +119,7 @@ obj-$(CONFIG_SCSI_IPR) += ipr.o obj-$(CONFIG_SCSI_SRP) += libsrp.o obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi/ obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/ +obj-$(CONFIG_SCSI_IBMVFC) += ibmvscsi/ obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o obj-$(CONFIG_SCSI_STEX) += stex.o obj-$(CONFIG_SCSI_MVSAS) += mvsas.o diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c index 5fd83de..a735526 100644 --- a/drivers/scsi/aacraid/commctrl.c +++ b/drivers/scsi/aacraid/commctrl.c @@ -41,6 +41,7 @@ #include <linux/kthread.h> #include <linux/semaphore.h> #include <asm/uaccess.h> +#include <scsi/scsi_host.h> #include "aacraid.h" @@ -581,6 +582,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < upsg->count; i++) { u64 addr; void* p; + if (upsg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } /* Does this really need to be GFP_DMA? */ p = kmalloc(upsg->sg[i].count,GFP_KERNEL|__GFP_DMA); if(!p) { @@ -625,6 +634,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < usg->count; i++) { u64 addr; void* p; + if (usg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } /* Does this really need to be GFP_DMA? */ p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA); if(!p) { @@ -667,6 +684,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < upsg->count; i++) { uintptr_t addr; void* p; + if (usg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } /* Does this really need to be GFP_DMA? */ p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA); if(!p) { @@ -698,6 +723,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < upsg->count; i++) { dma_addr_t addr; void* p; + if (upsg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } p = kmalloc(upsg->sg[i].count, GFP_KERNEL); if (!p) { dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n", diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index 68c140e..9aa301c 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -865,7 +865,7 @@ static ssize_t aac_show_bios_version(struct device *device, return len; } -ssize_t aac_show_serial_number(struct device *device, +static ssize_t aac_show_serial_number(struct device *device, struct device_attribute *attr, char *buf) { struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata; diff --git a/drivers/scsi/device_handler/Kconfig b/drivers/scsi/device_handler/Kconfig new file mode 100644 index 0000000..2adc0f6 --- /dev/null +++ b/drivers/scsi/device_handler/Kconfig @@ -0,0 +1,32 @@ +# +# SCSI Device Handler configuration +# + +menuconfig SCSI_DH + tristate "SCSI Device Handlers" + depends on SCSI + default n + help + SCSI Device Handlers provide device specific support for + devices utilized in multipath configurations. Say Y here to + select support for specific hardware. + +config SCSI_DH_RDAC + tristate "LSI RDAC Device Handler" + depends on SCSI_DH + help + If you have a LSI RDAC select y. Otherwise, say N. + +config SCSI_DH_HP_SW + tristate "HP/COMPAQ MSA Device Handler" + depends on SCSI_DH + help + If you have a HP/COMPAQ MSA device that requires START_STOP to + be sent to start it and cannot upgrade the firmware then select y. + Otherwise, say N. + +config SCSI_DH_EMC + tristate "EMC CLARiiON Device Handler" + depends on SCSI_DH + help + If you have a EMC CLARiiON select y. Otherwise, say N. diff --git a/drivers/scsi/device_handler/Makefile b/drivers/scsi/device_handler/Makefile new file mode 100644 index 0000000..35272e9 --- /dev/null +++ b/drivers/scsi/device_handler/Makefile @@ -0,0 +1,7 @@ +# +# SCSI Device Handler +# +obj-$(CONFIG_SCSI_DH) += scsi_dh.o +obj-$(CONFIG_SCSI_DH_RDAC) += scsi_dh_rdac.o +obj-$(CONFIG_SCSI_DH_HP_SW) += scsi_dh_hp_sw.o +obj-$(CONFIG_SCSI_DH_EMC) += scsi_dh_emc.o diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c new file mode 100644 index 0000000..ab6c21c --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh.c @@ -0,0 +1,162 @@ +/* + * SCSI device handler infrastruture. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright IBM Corporation, 2007 + * Authors: + * Chandra Seetharaman <sekharan@us.ibm.com> + * Mike Anderson <andmike@linux.vnet.ibm.com> + */ + +#include <scsi/scsi_dh.h> +#include "../scsi_priv.h" + +static DEFINE_SPINLOCK(list_lock); +static LIST_HEAD(scsi_dh_list); + +static struct scsi_device_handler *get_device_handler(const char *name) +{ + struct scsi_device_handler *tmp, *found = NULL; + + spin_lock(&list_lock); + list_for_each_entry(tmp, &scsi_dh_list, list) { + if (!strcmp(tmp->name, name)) { + found = tmp; + break; + } + } + spin_unlock(&list_lock); + return found; +} + +static int scsi_dh_notifier_add(struct device *dev, void *data) +{ + struct scsi_device_handler *scsi_dh = data; + + scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_ADD_DEVICE, dev); + return 0; +} + +/* + * scsi_register_device_handler - register a device handler personality + * module. + * @scsi_dh - device handler to be registered. + * + * Returns 0 on success, -EBUSY if handler already registered. + */ +int scsi_register_device_handler(struct scsi_device_handler *scsi_dh) +{ + int ret = -EBUSY; + struct scsi_device_handler *tmp; + + tmp = get_device_handler(scsi_dh->name); + if (tmp) + goto done; + + ret = bus_register_notifier(&scsi_bus_type, &scsi_dh->nb); + + bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, scsi_dh_notifier_add); + spin_lock(&list_lock); + list_add(&scsi_dh->list, &scsi_dh_list); + spin_unlock(&list_lock); + +done: + return ret; +} +EXPORT_SYMBOL_GPL(scsi_register_device_handler); + +static int scsi_dh_notifier_remove(struct device *dev, void *data) +{ + struct scsi_device_handler *scsi_dh = data; + + scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_DEL_DEVICE, dev); + return 0; +} + +/* + * scsi_unregister_device_handler - register a device handler personality + * module. + * @scsi_dh - device handler to be unregistered. + * + * Returns 0 on success, -ENODEV if handler not registered. + */ +int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh) +{ + int ret = -ENODEV; + struct scsi_device_handler *tmp; + + tmp = get_device_handler(scsi_dh->name); + if (!tmp) + goto done; + + ret = bus_unregister_notifier(&scsi_bus_type, &scsi_dh->nb); + + bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, + scsi_dh_notifier_remove); + spin_lock(&list_lock); + list_del(&scsi_dh->list); + spin_unlock(&list_lock); + +done: + return ret; +} +EXPORT_SYMBOL_GPL(scsi_unregister_device_handler); + +/* + * scsi_dh_activate - activate the path associated with the scsi_device + * corresponding to the given request queue. + * @q - Request queue that is associated with the scsi_device to be + * activated. + */ +int scsi_dh_activate(struct request_queue *q) +{ + int err = 0; + unsigned long flags; + struct scsi_device *sdev; + struct scsi_device_handler *scsi_dh = NULL; + + spin_lock_irqsave(q->queue_lock, flags); + sdev = q->queuedata; + if (sdev && sdev->scsi_dh_data) + scsi_dh = sdev->scsi_dh_data->scsi_dh; + if (!scsi_dh || !get_device(&sdev->sdev_gendev)) + err = SCSI_DH_NOSYS; + spin_unlock_irqrestore(q->queue_lock, flags); + + if (err) + return err; + + if (scsi_dh->activate) + err = scsi_dh->activate(sdev); + put_device(&sdev->sdev_gendev); + return err; +} +EXPORT_SYMBOL_GPL(scsi_dh_activate); + +/* + * scsi_dh_handler_exist - Return TRUE(1) if a device handler exists for + * the given name. FALSE(0) otherwise. + * @name - name of the device handler. + */ +int scsi_dh_handler_exist(const char *name) +{ + return (get_device_handler(name) != NULL); +} +EXPORT_SYMBOL_GPL(scsi_dh_handler_exist); + +MODULE_DESCRIPTION("SCSI device handler"); +MODULE_AUTHOR("Chandra Seetharaman <sekharan@us.ibm.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c new file mode 100644 index 0000000..ed53f14 --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh_emc.c @@ -0,0 +1,499 @@ +/* + * Target driver for EMC CLARiiON AX/CX-series hardware. + * Based on code from Lars Marowsky-Bree <lmb@suse.de> + * and Ed Goggin <egoggin@emc.com>. + * + * Copyright (C) 2006 Red Hat, Inc. All rights reserved. + * Copyright (C) 2006 Mike Christie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <scsi/scsi.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_dh.h> +#include <scsi/scsi_device.h> + +#define CLARIION_NAME "emc_clariion" + +#define CLARIION_TRESPASS_PAGE 0x22 +#define CLARIION_BUFFER_SIZE 0x80 +#define CLARIION_TIMEOUT (60 * HZ) +#define CLARIION_RETRIES 3 +#define CLARIION_UNBOUND_LU -1 + +static unsigned char long_trespass[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x09, /* Page length - 2 */ + 0x81, /* Trespass code + Honor reservation bit */ + 0xff, 0xff, /* Trespass target */ + 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ +}; + +static unsigned char long_trespass_hr[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x09, /* Page length - 2 */ + 0x01, /* Trespass code + Honor reservation bit */ + 0xff, 0xff, /* Trespass target */ + 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ +}; + +static unsigned char short_trespass[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x02, /* Page length - 2 */ + 0x81, /* Trespass code + Honor reservation bit */ + 0xff, /* Trespass target */ +}; + +static unsigned char short_trespass_hr[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x02, /* Page length - 2 */ + 0x01, /* Trespass code + Honor reservation bit */ + 0xff, /* Trespass target */ +}; + +struct clariion_dh_data { + /* + * Use short trespass command (FC-series) or the long version + * (default for AX/CX CLARiiON arrays). + */ + unsigned short_trespass; + /* + * Whether or not (default) to honor SCSI reservations when + * initiating a switch-over. + */ + unsigned hr; + /* I/O buffer for both MODE_SELECT and INQUIRY commands. */ + char buffer[CLARIION_BUFFER_SIZE]; + /* + * SCSI sense buffer for commands -- assumes serial issuance + * and completion sequence of all commands for same multipath. + */ + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + /* which SP (A=0,B=1,UNBOUND=-1) is dflt SP for path's mapped dev */ + int default_sp; + /* which SP (A=0,B=1,UNBOUND=-1) is active for path's mapped dev */ + int current_sp; +}; + +static inline struct clariion_dh_data + *get_clariion_data(struct scsi_device *sdev) +{ + struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; + BUG_ON(scsi_dh_data == NULL); + return ((struct clariion_dh_data *) scsi_dh_data->buf); +} + +/* + * Parse MODE_SELECT cmd reply. + */ +static int trespass_endio(struct scsi_device *sdev, int result) +{ + int err = SCSI_DH_OK; + struct scsi_sense_hdr sshdr; + struct clariion_dh_data *csdev = get_clariion_data(sdev); + char *sense = csdev->sense; + + if (status_byte(result) == CHECK_CONDITION && + scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) { + sdev_printk(KERN_ERR, sdev, "Found valid sense data 0x%2x, " + "0x%2x, 0x%2x while sending CLARiiON trespass " + "command.\n", sshdr.sense_key, sshdr.asc, + sshdr.ascq); + + if ((sshdr.sense_key == 0x05) && (sshdr.asc == 0x04) && + (sshdr.ascq == 0x00)) { + /* + * Array based copy in progress -- do not send + * mode_select or copy will be aborted mid-stream. + */ + sdev_printk(KERN_INFO, sdev, "Array Based Copy in " + "progress while sending CLARiiON trespass " + "command.\n"); + err = SCSI_DH_DEV_TEMP_BUSY; + } else if ((sshdr.sense_key == 0x02) && (sshdr.asc == 0x04) && + (sshdr.ascq == 0x03)) { + /* + * LUN Not Ready - Manual Intervention Required + * indicates in-progress ucode upgrade (NDU). + */ + sdev_printk(KERN_INFO, sdev, "Detected in-progress " + "ucode upgrade NDU operation while sending " + "CLARiiON trespass command.\n"); + err = SCSI_DH_DEV_TEMP_BUSY; + } else + err = SCSI_DH_DEV_FAILED; + } else if (result) { + sdev_printk(KERN_ERR, sdev, "Error 0x%x while sending " + "CLARiiON trespass command.\n", result); + err = SCSI_DH_IO; + } + + return err; +} + +static int parse_sp_info_reply(struct scsi_device *sdev, int result, + int *default_sp, int *current_sp, int *new_current_sp) +{ + int err = SCSI_DH_OK; + struct clariion_dh_data *csdev = get_clariion_data(sdev); + + if (result == 0) { + /* check for in-progress ucode upgrade (NDU) */ + if (csdev->buffer[48] != 0) { + sdev_printk(KERN_NOTICE, sdev, "Detected in-progress " + "ucode upgrade NDU operation while finding " + "current active SP."); + err = SCSI_DH_DEV_TEMP_BUSY; + } else { + *default_sp = csdev->buffer[5]; + + if (csdev->buffer[4] == 2) + /* SP for path is current */ + *current_sp = csdev->buffer[8]; + else { + if (csdev->buffer[4] == 1) + /* SP for this path is NOT current */ + if (csdev->buffer[8] == 0) + *current_sp = 1; + else + *current_sp = 0; + else + /* unbound LU or LUNZ */ + *current_sp = CLARIION_UNBOUND_LU; + } + *new_current_sp = csdev->buffer[8]; + } + } else { + struct scsi_sense_hdr sshdr; + + err = SCSI_DH_IO; + + if (scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE, + &sshdr)) + sdev_printk(KERN_ERR, sdev, "Found valid sense data " + "0x%2x, 0x%2x, 0x%2x while finding current " + "active SP.", sshdr.sense_key, sshdr.asc, + sshdr.ascq); + else + sdev_printk(KERN_ERR, sdev, "Error 0x%x finding " + "current active SP.", result); + } + + return err; +} + +static int sp_info_endio(struct scsi_device *sdev, int result, + int mode_select_sent, int *done) +{ + struct clariion_dh_data *csdev = get_clariion_data(sdev); + int err_flags, default_sp, current_sp, new_current_sp; + + err_flags = parse_sp_info_reply(sdev, result, &default_sp, + ¤t_sp, &new_current_sp); + + if (err_flags != SCSI_DH_OK) + goto done; + + if (mode_select_sent) { + csdev->default_sp = default_sp; + csdev->current_sp = current_sp; + } else { + /* + * Issue the actual module_selec request IFF either + * (1) we do not know the identity of the current SP OR + * (2) what we think we know is actually correct. + */ + if ((current_sp != CLARIION_UNBOUND_LU) && + (new_current_sp != current_sp)) { + + csdev->default_sp = default_sp; + csdev->current_sp = current_sp; + + sdev_printk(KERN_INFO, sdev, "Ignoring path group " + "switch-over command for CLARiiON SP%s since " + " mapped device is already initialized.", + current_sp ? "B" : "A"); + if (done) + *done = 1; /* as good as doing it */ + } + } +done: + return err_flags; +} + +/* +* Get block request for REQ_BLOCK_PC command issued to path. Currently +* limited to MODE_SELECT (trespass) and INQUIRY (VPD page 0xC0) commands. +* +* Uses data and sense buffers in hardware handler context structure and +* assumes serial servicing of commands, both issuance and completion. +*/ +static struct request *get_req(struct scsi_device *sdev, int cmd) +{ + struct clariion_dh_data *csdev = get_clariion_data(sdev); + struct request *rq; + unsigned char *page22; + int len = 0; + + rq = blk_get_request(sdev->request_queue, + (cmd == MODE_SELECT) ? WRITE : READ, GFP_ATOMIC); + if (!rq) { + sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed"); + return NULL; + } + + memset(&rq->cmd, 0, BLK_MAX_CDB); + rq->cmd[0] = cmd; + rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); + + switch (cmd) { + case MODE_SELECT: + if (csdev->short_trespass) { + page22 = csdev->hr ? short_trespass_hr : short_trespass; + len = sizeof(short_trespass); + } else { + page22 = csdev->hr ? long_trespass_hr : long_trespass; + len = sizeof(long_trespass); + } + /* + * Can't DMA from kernel BSS -- must copy selected trespass + * command mode page contents to context buffer which is + * allocated by kmalloc. + */ + BUG_ON((len > CLARIION_BUFFER_SIZE)); + memcpy(csdev->buffer, page22, len); + rq->cmd_flags |= REQ_RW; + rq->cmd[1] = 0x10; + break; + case INQUIRY: + rq->cmd[1] = 0x1; + rq->cmd[2] = 0xC0; + len = CLARIION_BUFFER_SIZE; + memset(csdev->buffer, 0, CLARIION_BUFFER_SIZE); + break; + default: + BUG_ON(1); + break; + } + + rq->cmd[4] = len; + rq->cmd_type = REQ_TYPE_BLOCK_PC; + rq->cmd_flags |= REQ_FAILFAST; + rq->timeout = CLARIION_TIMEOUT; + rq->retries = CLARIION_RETRIES; + + rq->sense = csdev->sense; + memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); + rq->sense_len = 0; + + if (blk_rq_map_kern(sdev->request_queue, rq, csdev->buffer, + len, GFP_ATOMIC)) { + __blk_put_request(rq->q, rq); + return NULL; + } + + return rq; +} + +static int send_cmd(struct scsi_device *sdev, int cmd) +{ + struct request *rq = get_req(sdev, cmd); + + if (!rq) + return SCSI_DH_RES_TEMP_UNAVAIL; + + return blk_execute_rq(sdev->request_queue, NULL, rq, 1); +} + +static int clariion_activate(struct scsi_device *sdev) +{ + int result, done = 0; + + result = send_cmd(sdev, INQUIRY); + result = sp_info_endio(sdev, result, 0, &done); + if (result || done) + goto done; + + result = send_cmd(sdev, MODE_SELECT); + result = trespass_endio(sdev, result); + if (result) + goto done; + + result = send_cmd(sdev, INQUIRY); + result = sp_info_endio(sdev, result, 1, NULL); +done: + return result; +} + +static int clariion_check_sense(struct scsi_device *sdev, + struct scsi_sense_hdr *sense_hdr) +{ + switch (sense_hdr->sense_key) { + case NOT_READY: + if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x03) + /* + * LUN Not Ready - Manual Intervention Required + * indicates this is a passive path. + * + * FIXME: However, if this is seen and EVPD C0 + * indicates that this is due to a NDU in + * progress, we should set FAIL_PATH too. + * This indicates we might have to do a SCSI + * inquiry in the end_io path. Ugh. + * + * Can return FAILED only when we want the error + * recovery process to kick in. + */ + return SUCCESS; + break; + case ILLEGAL_REQUEST: + if (sense_hdr->asc == 0x25 && sense_hdr->ascq == 0x01) + /* + * An array based copy is in progress. Do not + * fail the path, do not bypass to another PG, + * do not retry. Fail the IO immediately. + * (Actually this is the same conclusion as in + * the default handler, but lets make sure.) + * + * Can return FAILED only when we want the error + * recovery process to kick in. + */ + return SUCCESS; + break; + case UNIT_ATTENTION: + if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) + /* + * Unit Attention Code. This is the first IO + * to the new path, so just retry. + */ + return NEEDS_RETRY; + break; + } + + /* success just means we do not care what scsi-ml does */ + return SUCCESS; +} + +static const struct { + char *vendor; + char *model; +} clariion_dev_list[] = { + {"DGC", "RAID"}, + {"DGC", "DISK"}, + {NULL, NULL}, +}; + +static int clariion_bus_notify(struct notifier_block *, unsigned long, void *); + +static struct scsi_device_handler clariion_dh = { + .name = CLARIION_NAME, + .module = THIS_MODULE, + .nb.notifier_call = clariion_bus_notify, + .check_sense = clariion_check_sense, + .activate = clariion_activate, +}; + +/* + * TODO: need some interface so we can set trespass values + */ +static int clariion_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_dh_data *scsi_dh_data; + struct clariion_dh_data *h; + int i, found = 0; + unsigned long flags; + + if (action == BUS_NOTIFY_ADD_DEVICE) { + for (i = 0; clariion_dev_list[i].vendor; i++) { + if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor, + strlen(clariion_dev_list[i].vendor)) && + !strncmp(sdev->model, clariion_dev_list[i].model, + strlen(clariion_dev_list[i].model))) { + found = 1; + break; + } + } + if (!found) + goto out; + + scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) + + sizeof(*h) , GFP_KERNEL); + if (!scsi_dh_data) { + sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n", + CLARIION_NAME); + goto out; + } + + scsi_dh_data->scsi_dh = &clariion_dh; + h = (struct clariion_dh_data *) scsi_dh_data->buf; + h->default_sp = CLARIION_UNBOUND_LU; + h->current_sp = CLARIION_UNBOUND_LU; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + sdev->scsi_dh_data = scsi_dh_data; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + + sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", CLARIION_NAME); + try_module_get(THIS_MODULE); + + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (sdev->scsi_dh_data == NULL || + sdev->scsi_dh_data->scsi_dh != &clariion_dh) + goto out; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + scsi_dh_data = sdev->scsi_dh_data; + sdev->scsi_dh_data = NULL; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + + sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", + CLARIION_NAME); + + kfree(scsi_dh_data); + module_put(THIS_MODULE); + } + +out: + return 0; +} + +static int __init clariion_init(void) +{ + int r; + + r = scsi_register_device_handler(&clariion_dh); + if (r != 0) + printk(KERN_ERR "Failed to register scsi device handler."); + return r; +} + +static void __exit clariion_exit(void) +{ + scsi_unregister_device_handler(&clariion_dh); +} + +module_init(clariion_init); +module_exit(clariion_exit); + +MODULE_DESCRIPTION("EMC CX/AX/FC-family driver"); +MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, Chandra Seetharaman <sekharan@us.ibm.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c new file mode 100644 index 0000000..12ceab7 --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c @@ -0,0 +1,202 @@ +/* + * Basic HP/COMPAQ MSA 1000 support. This is only needed if your HW cannot be + * upgraded. + * + * Copyright (C) 2006 Red Hat, Inc. All rights reserved. + * Copyright (C) 2006 Mike Christie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <scsi/scsi.h> +#include <scsi/scsi_dbg.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_dh.h> + +#define HP_SW_NAME "hp_sw" + +#define HP_SW_TIMEOUT (60 * HZ) +#define HP_SW_RETRIES 3 + +struct hp_sw_dh_data { + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + int retries; +}; + +static inline struct hp_sw_dh_data *get_hp_sw_data(struct scsi_device *sdev) +{ + struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; + BUG_ON(scsi_dh_data == NULL); + return ((struct hp_sw_dh_data *) scsi_dh_data->buf); +} + +static int hp_sw_done(struct scsi_device *sdev) +{ + struct hp_sw_dh_data *h = get_hp_sw_data(sdev); + struct scsi_sense_hdr sshdr; + int rc; + + sdev_printk(KERN_INFO, sdev, "hp_sw_done\n"); + + rc = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, &sshdr); + if (!rc) + goto done; + switch (sshdr.sense_key) { + case NOT_READY: + if ((sshdr.asc == 0x04) && (sshdr.ascq == 3)) { + rc = SCSI_DH_RETRY; + h->retries++; + break; + } + /* fall through */ + default: + h->retries++; + rc = SCSI_DH_IMM_RETRY; + } + +done: + if (rc == SCSI_DH_OK || rc == SCSI_DH_IO) + h->retries = 0; + else if (h->retries > HP_SW_RETRIES) { + h->retries = 0; + rc = SCSI_DH_IO; + } + return rc; +} + +static int hp_sw_activate(struct scsi_device *sdev) +{ + struct hp_sw_dh_data *h = get_hp_sw_data(sdev); + struct request *req; + int ret = SCSI_DH_RES_TEMP_UNAVAIL; + + req = blk_get_request(sdev->request_queue, WRITE, GFP_ATOMIC); + if (!req) + goto done; + + sdev_printk(KERN_INFO, sdev, "sending START_STOP."); + + req->cmd_type = REQ_TYPE_BLOCK_PC; + req->cmd_flags |= REQ_FAILFAST; + req->cmd_len = COMMAND_SIZE(START_STOP); + memset(req->cmd, 0, MAX_COMMAND_SIZE); + req->cmd[0] = START_STOP; + req->cmd[4] = 1; /* Start spin cycle */ + req->timeout = HP_SW_TIMEOUT; + req->sense = h->sense; + memset(req->sense, 0, SCSI_SENSE_BUFFERSIZE); + req->sense_len = 0; + + ret = blk_execute_rq(req->q, NULL, req, 1); + if (!ret) /* SUCCESS */ + ret = hp_sw_done(sdev); + else + ret = SCSI_DH_IO; +done: + return ret; +} + +static const struct { + char *vendor; + char *model; +} hp_sw_dh_data_list[] = { + {"COMPAQ", "MSA"}, + {"HP", "HSV"}, + {"DEC", "HSG80"}, + {NULL, NULL}, +}; + +static int hp_sw_bus_notify(struct notifier_block *, unsigned long, void *); + +static struct scsi_device_handler hp_sw_dh = { + .name = HP_SW_NAME, + .module = THIS_MODULE, + .nb.notifier_call = hp_sw_bus_notify, + .activate = hp_sw_activate, +}; + +static int hp_sw_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_dh_data *scsi_dh_data; + int i, found = 0; + unsigned long flags; + + if (action == BUS_NOTIFY_ADD_DEVICE) { + for (i = 0; hp_sw_dh_data_list[i].vendor; i++) { + if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor, + strlen(hp_sw_dh_data_list[i].vendor)) && + !strncmp(sdev->model, hp_sw_dh_data_list[i].model, + strlen(hp_sw_dh_data_list[i].model))) { + found = 1; + break; + } + } + if (!found) + goto out; + + scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) + + sizeof(struct hp_sw_dh_data) , GFP_KERNEL); + if (!scsi_dh_data) { + sdev_printk(KERN_ERR, sdev, "Attach Failed %s.\n", + HP_SW_NAME); + goto out; + } + + scsi_dh_data->scsi_dh = &hp_sw_dh; + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + sdev->scsi_dh_data = scsi_dh_data; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + try_module_get(THIS_MODULE); + + sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", HP_SW_NAME); + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (sdev->scsi_dh_data == NULL || + sdev->scsi_dh_data->scsi_dh != &hp_sw_dh) + goto out; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + scsi_dh_data = sdev->scsi_dh_data; + sdev->scsi_dh_data = NULL; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + module_put(THIS_MODULE); + + sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", HP_SW_NAME); + + kfree(scsi_dh_data); + } + +out: + return 0; +} + +static int __init hp_sw_init(void) +{ + return scsi_register_device_handler(&hp_sw_dh); +} + +static void __exit hp_sw_exit(void) +{ + scsi_unregister_device_handler(&hp_sw_dh); +} + +module_init(hp_sw_init); +module_exit(hp_sw_exit); + +MODULE_DESCRIPTION("HP MSA 1000"); +MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c new file mode 100644 index 0000000..6fff077 --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -0,0 +1,691 @@ +/* + * Engenio/LSI RDAC SCSI Device Handler + * + * Copyright (C) 2005 Mike Christie. All rights reserved. + * Copyright (C) Chandra Seetharaman, IBM Corp. 2007 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ +#include <scsi/scsi.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_dh.h> + +#define RDAC_NAME "rdac" + +/* + * LSI mode page stuff + * + * These struct definitions and the forming of the + * mode page were taken from the LSI RDAC 2.4 GPL'd + * driver, and then converted to Linux conventions. + */ +#define RDAC_QUIESCENCE_TIME 20; +/* + * Page Codes + */ +#define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c + +/* + * Controller modes definitions + */ +#define RDAC_MODE_TRANSFER_SPECIFIED_LUNS 0x02 + +/* + * RDAC Options field + */ +#define RDAC_FORCED_QUIESENCE 0x02 + +#define RDAC_TIMEOUT (60 * HZ) +#define RDAC_RETRIES 3 + +struct rdac_mode_6_hdr { + u8 data_len; + u8 medium_type; + u8 device_params; + u8 block_desc_len; +}; + +struct rdac_mode_10_hdr { + u16 data_len; + u8 medium_type; + u8 device_params; + u16 reserved; + u16 block_desc_len; +}; + +struct rdac_mode_common { + u8 controller_serial[16]; + u8 alt_controller_serial[16]; + u8 rdac_mode[2]; + u8 alt_rdac_mode[2]; + u8 quiescence_timeout; + u8 rdac_options; +}; + +struct rdac_pg_legacy { + struct rdac_mode_6_hdr hdr; + u8 page_code; + u8 page_len; + struct rdac_mode_common common; +#define MODE6_MAX_LUN 32 + u8 lun_table[MODE6_MAX_LUN]; + u8 reserved2[32]; + u8 reserved3; + u8 reserved4; +}; + +struct rdac_pg_expanded { + struct rdac_mode_10_hdr hdr; + u8 page_code; + u8 subpage_code; + u8 page_len[2]; + struct rdac_mode_common common; + u8 lun_table[256]; + u8 reserved3; + u8 reserved4; +}; + +struct c9_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC9 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "vace" */ + u8 avte_cvp; + u8 path_prio; + u8 reserved2[38]; +}; + +#define SUBSYS_ID_LEN 16 +#define SLOT_ID_LEN 2 + +struct c4_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC4 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "subs" */ + u8 subsys_id[SUBSYS_ID_LEN]; + u8 revision[4]; + u8 slot_id[SLOT_ID_LEN]; + u8 reserved[2]; +}; + +struct rdac_controller { + u8 subsys_id[SUBSYS_ID_LEN]; + u8 slot_id[SLOT_ID_LEN]; + int use_ms10; + struct kref kref; + struct list_head node; /* list of all controllers */ + union { + struct rdac_pg_legacy legacy; + struct rdac_pg_expanded expanded; + } mode_select; +}; +struct c8_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC8 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "edid" */ + u8 reserved2[3]; + u8 vol_uniq_id_len; + u8 vol_uniq_id[16]; + u8 vol_user_label_len; + u8 vol_user_label[60]; + u8 array_uniq_id_len; + u8 array_unique_id[16]; + u8 array_user_label_len; + u8 array_user_label[60]; + u8 lun[8]; +}; + +struct c2_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC2 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "swr4" */ + u8 sw_version[3]; + u8 sw_date[3]; + u8 features_enabled; + u8 max_lun_supported; + u8 partitions[239]; /* Total allocation length should be 0xFF */ +}; + +struct rdac_dh_data { + struct rdac_controller *ctlr; +#define UNINITIALIZED_LUN (1 << 8) + unsigned lun; +#define RDAC_STATE_ACTIVE 0 +#define RDAC_STATE_PASSIVE 1 + unsigned char state; + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + union { + struct c2_inquiry c2; + struct c4_inquiry c4; + struct c8_inquiry c8; + struct c9_inquiry c9; + } inq; +}; + +static LIST_HEAD(ctlr_list); +static DEFINE_SPINLOCK(list_lock); + +static inline struct rdac_dh_data *get_rdac_data(struct scsi_device *sdev) +{ + struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; + BUG_ON(scsi_dh_data == NULL); + return ((struct rdac_dh_data *) scsi_dh_data->buf); +} + +static struct request *get_rdac_req(struct scsi_device *sdev, + void *buffer, unsigned buflen, int rw) +{ + struct request *rq; + struct request_queue *q = sdev->request_queue; + struct rdac_dh_data *h = get_rdac_data(sdev); + + rq = blk_get_request(q, rw, GFP_KERNEL); + + if (!rq) { + sdev_printk(KERN_INFO, sdev, + "get_rdac_req: blk_get_request failed.\n"); + return NULL; + } + + if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_KERNEL)) { + blk_put_request(rq); + sdev_printk(KERN_INFO, sdev, + "get_rdac_req: blk_rq_map_kern failed.\n"); + return NULL; + } + + memset(&rq->cmd, 0, BLK_MAX_CDB); + rq->sense = h->sense; + memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); + rq->sense_len = 0; + + rq->cmd_type = REQ_TYPE_BLOCK_PC; + rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE; + rq->retries = RDAC_RETRIES; + rq->timeout = RDAC_TIMEOUT; + + return rq; +} + +static struct request *rdac_failover_get(struct scsi_device *sdev) +{ + struct request *rq; + struct rdac_mode_common *common; + unsigned data_size; + struct rdac_dh_data *h = get_rdac_data(sdev); + + if (h->ctlr->use_ms10) { + struct rdac_pg_expanded *rdac_pg; + + data_size = sizeof(struct rdac_pg_expanded); + rdac_pg = &h->ctlr->mode_select.expanded; + memset(rdac_pg, 0, data_size); + common = &rdac_pg->common; + rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER + 0x40; + rdac_pg->subpage_code = 0x1; + rdac_pg->page_len[0] = 0x01; + rdac_pg->page_len[1] = 0x28; + rdac_pg->lun_table[h->lun] = 0x81; + } else { + struct rdac_pg_legacy *rdac_pg; + + data_size = sizeof(struct rdac_pg_legacy); + rdac_pg = &h->ctlr->mode_select.legacy; + memset(rdac_pg, 0, data_size); + common = &rdac_pg->common; + rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER; + rdac_pg->page_len = 0x68; + rdac_pg->lun_table[h->lun] = 0x81; + } + common->rdac_mode[1] = RDAC_MODE_TRANSFER_SPECIFIED_LUNS; + common->quiescence_timeout = RDAC_QUIESCENCE_TIME; + common->rdac_options = RDAC_FORCED_QUIESENCE; + + /* get request for block layer packet command */ + rq = get_rdac_req(sdev, &h->ctlr->mode_select, data_size, WRITE); + if (!rq) + return NULL; + + /* Prepare the command. */ + if (h->ctlr->use_ms10) { + rq->cmd[0] = MODE_SELECT_10; + rq->cmd[7] = data_size >> 8; + rq->cmd[8] = data_size & 0xff; + } else { + rq->cmd[0] = MODE_SELECT; + rq->cmd[4] = data_size; + } + rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); + + return rq; +} + +static void release_controller(struct kref *kref) +{ + struct rdac_controller *ctlr; + ctlr = container_of(kref, struct rdac_controller, kref); + + spin_lock(&list_lock); + list_del(&ctlr->node); + spin_unlock(&list_lock); + kfree(ctlr); +} + +static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id) +{ + struct rdac_controller *ctlr, *tmp; + + spin_lock(&list_lock); + + list_for_each_entry(tmp, &ctlr_list, node) { + if ((memcmp(tmp->subsys_id, subsys_id, SUBSYS_ID_LEN) == 0) && + (memcmp(tmp->slot_id, slot_id, SLOT_ID_LEN) == 0)) { + kref_get(&tmp->kref); + spin_unlock(&list_lock); + return tmp; + } + } + ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC); + if (!ctlr) + goto done; + + /* initialize fields of controller */ + memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN); + memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN); + kref_init(&ctlr->kref); + ctlr->use_ms10 = -1; + list_add(&ctlr->node, &ctlr_list); +done: + spin_unlock(&list_lock); + return ctlr; +} + +static int submit_inquiry(struct scsi_device *sdev, int page_code, + unsigned int len) +{ + struct request *rq; + struct request_queue *q = sdev->request_queue; + struct rdac_dh_data *h = get_rdac_data(sdev); + int err = SCSI_DH_RES_TEMP_UNAVAIL; + + rq = get_rdac_req(sdev, &h->inq, len, READ); + if (!rq) + goto done; + + /* Prepare the command. */ + rq->cmd[0] = INQUIRY; + rq->cmd[1] = 1; + rq->cmd[2] = page_code; + rq->cmd[4] = len; + rq->cmd_len = COMMAND_SIZE(INQUIRY); + err = blk_execute_rq(q, NULL, rq, 1); + if (err == -EIO) + err = SCSI_DH_IO; +done: + return err; +} + +static int get_lun(struct scsi_device *sdev) +{ + int err; + struct c8_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry)); + if (err == SCSI_DH_OK) { + inqp = &h->inq.c8; + h->lun = inqp->lun[7]; /* currently it uses only one byte */ + } + return err; +} + +#define RDAC_OWNED 0 +#define RDAC_UNOWNED 1 +#define RDAC_FAILED 2 +static int check_ownership(struct scsi_device *sdev) +{ + int err; + struct c9_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry)); + if (err == SCSI_DH_OK) { + err = RDAC_UNOWNED; + inqp = &h->inq.c9; + /* + * If in AVT mode or if the path already owns the LUN, + * return RDAC_OWNED; + */ + if (((inqp->avte_cvp >> 7) == 0x1) || + ((inqp->avte_cvp & 0x1) != 0)) + err = RDAC_OWNED; + } else + err = RDAC_FAILED; + return err; +} + +static int initialize_controller(struct scsi_device *sdev) +{ + int err; + struct c4_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry)); + if (err == SCSI_DH_OK) { + inqp = &h->inq.c4; + h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id); + if (!h->ctlr) + err = SCSI_DH_RES_TEMP_UNAVAIL; + } + return err; +} + +static int set_mode_select(struct scsi_device *sdev) +{ + int err; + struct c2_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC2, sizeof(struct c2_inquiry)); + if (err == SCSI_DH_OK) { + inqp = &h->inq.c2; + /* + * If more than MODE6_MAX_LUN luns are supported, use + * mode select 10 + */ + if (inqp->max_lun_supported >= MODE6_MAX_LUN) + h->ctlr->use_ms10 = 1; + else + h->ctlr->use_ms10 = 0; + } + return err; +} + +static int mode_select_handle_sense(struct scsi_device *sdev) +{ + struct scsi_sense_hdr sense_hdr; + struct rdac_dh_data *h = get_rdac_data(sdev); + int sense, err = SCSI_DH_IO, ret; + + ret = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, &sense_hdr); + if (!ret) + goto done; + + err = SCSI_DH_OK; + sense = (sense_hdr.sense_key << 16) | (sense_hdr.asc << 8) | + sense_hdr.ascq; + /* If it is retryable failure, submit the c9 inquiry again */ + if (sense == 0x59136 || sense == 0x68b02 || sense == 0xb8b02 || + sense == 0x62900) { + /* 0x59136 - Command lock contention + * 0x[6b]8b02 - Quiesense in progress or achieved + * 0x62900 - Power On, Reset, or Bus Device Reset + */ + err = SCSI_DH_RETRY; + } + + if (sense) + sdev_printk(KERN_INFO, sdev, + "MODE_SELECT failed with sense 0x%x.\n", sense); +done: + return err; +} + +static int send_mode_select(struct scsi_device *sdev) +{ + struct request *rq; + struct request_queue *q = sdev->request_queue; + struct rdac_dh_data *h = get_rdac_data(sdev); + int err = SCSI_DH_RES_TEMP_UNAVAIL; + + rq = rdac_failover_get(sdev); + if (!rq) + goto done; + + sdev_printk(KERN_INFO, sdev, "queueing MODE_SELECT command.\n"); + + err = blk_execute_rq(q, NULL, rq, 1); + if (err != SCSI_DH_OK) + err = mode_select_handle_sense(sdev); + if (err == SCSI_DH_OK) + h->state = RDAC_STATE_ACTIVE; +done: + return err; +} + +static int rdac_activate(struct scsi_device *sdev) +{ + struct rdac_dh_data *h = get_rdac_data(sdev); + int err = SCSI_DH_OK; + + if (h->lun == UNINITIALIZED_LUN) { + err = get_lun(sdev); + if (err != SCSI_DH_OK) + goto done; + } + + err = check_ownership(sdev); + switch (err) { + case RDAC_UNOWNED: + break; + case RDAC_OWNED: + err = SCSI_DH_OK; + goto done; + case RDAC_FAILED: + default: + err = SCSI_DH_IO; + goto done; + } + + if (!h->ctlr) { + err = initialize_controller(sdev); + if (err != SCSI_DH_OK) + goto done; + } + + if (h->ctlr->use_ms10 == -1) { + err = set_mode_select(sdev); + if (err != SCSI_DH_OK) + goto done; + } + + err = send_mode_select(sdev); +done: + return err; +} + +static int rdac_prep_fn(struct scsi_device *sdev, struct request *req) +{ + struct rdac_dh_data *h = get_rdac_data(sdev); + int ret = BLKPREP_OK; + + if (h->state != RDAC_STATE_ACTIVE) { + ret = BLKPREP_KILL; + req->cmd_flags |= REQ_QUIET; + } + return ret; + +} + +static int rdac_check_sense(struct scsi_device *sdev, + struct scsi_sense_hdr *sense_hdr) +{ + struct rdac_dh_data *h = get_rdac_data(sdev); + switch (sense_hdr->sense_key) { + case NOT_READY: + if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81) + /* LUN Not Ready - Storage firmware incompatible + * Manual code synchonisation required. + * + * Nothing we can do here. Try to bypass the path. + */ + return SUCCESS; + if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0xA1) + /* LUN Not Ready - Quiescense in progress + * + * Just retry and wait. + */ + return NEEDS_RETRY; + break; + case ILLEGAL_REQUEST: + if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) { + /* Invalid Request - Current Logical Unit Ownership. + * Controller is not the current owner of the LUN, + * Fail the path, so that the other path be used. + */ + h->state = RDAC_STATE_PASSIVE; + return SUCCESS; + } + break; + case UNIT_ATTENTION: + if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) + /* + * Power On, Reset, or Bus Device Reset, just retry. + */ + return NEEDS_RETRY; + break; + } + /* success just means we do not care what scsi-ml does */ + return SCSI_RETURN_NOT_HANDLED; +} + +static const struct { + char *vendor; + char *model; +} rdac_dev_list[] = { + {"IBM", "1722"}, + {"IBM", "1724"}, + {"IBM", "1726"}, + {"IBM", "1742"}, + {"IBM", "1814"}, + {"IBM", "1815"}, + {"IBM", "1818"}, + {"IBM", "3526"}, + {"SGI", "TP9400"}, + {"SGI", "TP9500"}, + {"SGI", "IS"}, + {"STK", "OPENstorage D280"}, + {"SUN", "CSM200_R"}, + {"SUN", "LCSM100_F"}, + {NULL, NULL}, +}; + +static int rdac_bus_notify(struct notifier_block *, unsigned long, void *); + +static struct scsi_device_handler rdac_dh = { + .name = RDAC_NAME, + .module = THIS_MODULE, + .nb.notifier_call = rdac_bus_notify, + .prep_fn = rdac_prep_fn, + .check_sense = rdac_check_sense, + .activate = rdac_activate, +}; + +/* + * TODO: need some interface so we can set trespass values + */ +static int rdac_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_dh_data *scsi_dh_data; + struct rdac_dh_data *h; + int i, found = 0; + unsigned long flags; + + if (action == BUS_NOTIFY_ADD_DEVICE) { + for (i = 0; rdac_dev_list[i].vendor; i++) { + if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor, + strlen(rdac_dev_list[i].vendor)) && + !strncmp(sdev->model, rdac_dev_list[i].model, + strlen(rdac_dev_list[i].model))) { + found = 1; + break; + } + } + if (!found) + goto out; + + scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) + + sizeof(*h) , GFP_KERNEL); + if (!scsi_dh_data) { + sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n", + RDAC_NAME); + goto out; + } + + scsi_dh_data->scsi_dh = &rdac_dh; + h = (struct rdac_dh_data *) scsi_dh_data->buf; + h->lun = UNINITIALIZED_LUN; + h->state = RDAC_STATE_ACTIVE; + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + sdev->scsi_dh_data = scsi_dh_data; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + try_module_get(THIS_MODULE); + + sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", RDAC_NAME); + + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (sdev->scsi_dh_data == NULL || + sdev->scsi_dh_data->scsi_dh != &rdac_dh) + goto out; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + scsi_dh_data = sdev->scsi_dh_data; + sdev->scsi_dh_data = NULL; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + + h = (struct rdac_dh_data *) scsi_dh_data->buf; + if (h->ctlr) + kref_put(&h->ctlr->kref, release_controller); + kfree(scsi_dh_data); + module_put(THIS_MODULE); + sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", RDAC_NAME); + } + +out: + return 0; +} + +static int __init rdac_init(void) +{ + int r; + + r = scsi_register_device_handler(&rdac_dh); + if (r != 0) + printk(KERN_ERR "Failed to register scsi device handler."); + return r; +} + +static void __exit rdac_exit(void) +{ + scsi_unregister_device_handler(&rdac_dh); +} + +module_init(rdac_init); +module_exit(rdac_exit); + +MODULE_DESCRIPTION("Multipath LSI/Engenio RDAC driver"); +MODULE_AUTHOR("Mike Christie, Chandra Seetharaman"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 59fbef0..62a4618 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -219,19 +219,10 @@ static void esp_reset_esp(struct esp *esp) /* Now reset the ESP chip */ scsi_esp_cmd(esp, ESP_CMD_RC); scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); + if (esp->rev == FAST) + esp_write8(ESP_CONFIG2_FENAB, ESP_CFG2); scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); - /* Reload the configuration registers */ - esp_write8(esp->cfact, ESP_CFACT); - - esp->prev_stp = 0; - esp_write8(esp->prev_stp, ESP_STP); - - esp->prev_soff = 0; - esp_write8(esp->prev_soff, ESP_SOFF); - - esp_write8(esp->neg_defp, ESP_TIMEO); - /* This is the only point at which it is reliable to read * the ID-code for a fast ESP chip variants. */ @@ -316,6 +307,17 @@ static void esp_reset_esp(struct esp *esp) break; } + /* Reload the configuration registers */ + esp_write8(esp->cfact, ESP_CFACT); + + esp->prev_stp = 0; + esp_write8(esp->prev_stp, ESP_STP); + + esp->prev_soff = 0; + esp_write8(esp->prev_soff, ESP_SOFF); + + esp_write8(esp->neg_defp, ESP_TIMEO); + /* Eat any bitrot in the chip */ esp_read8(ESP_INTRPT); udelay(100); diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index c6457bf..35cd892 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -290,7 +290,7 @@ static void scsi_host_dev_release(struct device *dev) kfree(shost); } -struct device_type scsi_host_type = { +static struct device_type scsi_host_type = { .name = "scsi_host", .release = scsi_host_dev_release, }; diff --git a/drivers/scsi/ibmvscsi/Makefile b/drivers/scsi/ibmvscsi/Makefile index 6ac0633..a423d96 100644 --- a/drivers/scsi/ibmvscsi/Makefile +++ b/drivers/scsi/ibmvscsi/Makefile @@ -5,3 +5,4 @@ ibmvscsic-$(CONFIG_PPC_ISERIES) += iseries_vscsi.o ibmvscsic-$(CONFIG_PPC_PSERIES) += rpa_vscsi.o obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvstgt.o +obj-$(CONFIG_SCSI_IBMVFC) += ibmvfc.o diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c new file mode 100644 index 0000000..eb702b9 --- /dev/null +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -0,0 +1,3910 @@ +/* + * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter + * + * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation + * + * Copyright (C) IBM Corporation, 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/dma-mapping.h> +#include <linux/dmapool.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kthread.h> +#include <linux/of.h> +#include <linux/stringify.h> +#include <asm/firmware.h> +#include <asm/irq.h> +#include <asm/vio.h> +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_transport_fc.h> +#include "ibmvfc.h" + +static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; +static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; +static unsigned int max_lun = IBMVFC_MAX_LUN; +static unsigned int max_targets = IBMVFC_MAX_TARGETS; +static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; +static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; +static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; +static unsigned int ibmvfc_debug = IBMVFC_DEBUG; +static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; +static LIST_HEAD(ibmvfc_head); +static DEFINE_SPINLOCK(ibmvfc_driver_lock); +static struct scsi_transport_template *ibmvfc_transport_template; + +MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); +MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(IBMVFC_DRIVER_VERSION); + +module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " + "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); +module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(default_timeout, + "Default timeout in seconds for initialization and EH commands. " + "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); +module_param_named(max_requests, max_requests, uint, S_IRUGO); +MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " + "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); +module_param_named(max_lun, max_lun, uint, S_IRUGO); +MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " + "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); +module_param_named(max_targets, max_targets, uint, S_IRUGO); +MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " + "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); +module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " + "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); +module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Enable driver debug information. " + "[Default=" __stringify(IBMVFC_DEBUG) "]"); +module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " + "transport should insulate the loss of a remote port. Once this " + "value is exceeded, the scsi target is removed. " + "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); +module_param_named(log_level, log_level, uint, 0); +MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " + "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); + +static const struct { + u16 status; + u16 error; + u8 result; + u8 retry; + int log; + char *name; +} cmd_status [] = { + { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, + + { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, + + { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, + { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, + { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, + { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, + { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, + { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, + { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, + { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, + { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, + { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, + { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, + + { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, +}; + +static void ibmvfc_npiv_login(struct ibmvfc_host *); +static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); +static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); +static void ibmvfc_tgt_query_target(struct ibmvfc_target *); + +static const char *unknown_error = "unknown error"; + +#ifdef CONFIG_SCSI_IBMVFC_TRACE +/** + * ibmvfc_trc_start - Log a start trace entry + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_trc_start(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; + struct ibmvfc_mad_common *mad = &evt->iu.mad_common; + struct ibmvfc_trace_entry *entry; + + entry = &vhost->trace[vhost->trace_index++]; + entry->evt = evt; + entry->time = jiffies; + entry->fmt = evt->crq.format; + entry->type = IBMVFC_TRC_START; + + switch (entry->fmt) { + case IBMVFC_CMD_FORMAT: + entry->op_code = vfc_cmd->iu.cdb[0]; + entry->scsi_id = vfc_cmd->tgt_scsi_id; + entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); + entry->tmf_flags = vfc_cmd->iu.tmf_flags; + entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; + break; + case IBMVFC_MAD_FORMAT: + entry->op_code = mad->opcode; + break; + default: + break; + }; +} + +/** + * ibmvfc_trc_end - Log an end trace entry + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_trc_end(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; + struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; + struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; + + entry->evt = evt; + entry->time = jiffies; + entry->fmt = evt->crq.format; + entry->type = IBMVFC_TRC_END; + + switch (entry->fmt) { + case IBMVFC_CMD_FORMAT: + entry->op_code = vfc_cmd->iu.cdb[0]; + entry->scsi_id = vfc_cmd->tgt_scsi_id; + entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); + entry->tmf_flags = vfc_cmd->iu.tmf_flags; + entry->u.end.status = vfc_cmd->status; + entry->u.end.error = vfc_cmd->error; + entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; + entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; + entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; + break; + case IBMVFC_MAD_FORMAT: + entry->op_code = mad->opcode; + entry->u.end.status = mad->status; + break; + default: + break; + + }; +} + +#else +#define ibmvfc_trc_start(evt) do { } while (0) +#define ibmvfc_trc_end(evt) do { } while (0) +#endif + +/** + * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response + * @status: status / error class + * @error: error + * + * Return value: + * index into cmd_status / -EINVAL on failure + **/ +static int ibmvfc_get_err_index(u16 status, u16 error) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(cmd_status); i++) + if ((cmd_status[i].status & status) == cmd_status[i].status && + cmd_status[i].error == error) + return i; + + return -EINVAL; +} + +/** + * ibmvfc_get_cmd_error - Find the error description for the fcp response + * @status: status / error class + * @error: error + * + * Return value: + * error description string + **/ +static const char *ibmvfc_get_cmd_error(u16 status, u16 error) +{ + int rc = ibmvfc_get_err_index(status, error); + if (rc >= 0) + return cmd_status[rc].name; + return unknown_error; +} + +/** + * ibmvfc_get_err_result - Find the scsi status to return for the fcp response + * @vfc_cmd: ibmvfc command struct + * + * Return value: + * SCSI result value to return for completed command + **/ +static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) +{ + int err; + struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; + int fc_rsp_len = rsp->fcp_rsp_len; + + if ((rsp->flags & FCP_RSP_LEN_VALID) && + ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || + rsp->data.info.rsp_code)) + return DID_ERROR << 16; + + if (!vfc_cmd->status) { + if (rsp->flags & FCP_RESID_OVER) + return rsp->scsi_status | (DID_ERROR << 16); + else + return rsp->scsi_status | (DID_OK << 16); + } + + err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); + if (err >= 0) + return rsp->scsi_status | (cmd_status[err].result << 16); + return rsp->scsi_status | (DID_ERROR << 16); +} + +/** + * ibmvfc_retry_cmd - Determine if error status is retryable + * @status: status / error class + * @error: error + * + * Return value: + * 1 if error should be retried / 0 if it should not + **/ +static int ibmvfc_retry_cmd(u16 status, u16 error) +{ + int rc = ibmvfc_get_err_index(status, error); + + if (rc >= 0) + return cmd_status[rc].retry; + return 1; +} + +static const char *unknown_fc_explain = "unknown fc explain"; + +static const struct { + u16 fc_explain; + char *name; +} ls_explain [] = { + { 0x00, "no additional explanation" }, + { 0x01, "service parameter error - options" }, + { 0x03, "service parameter error - initiator control" }, + { 0x05, "service parameter error - recipient control" }, + { 0x07, "service parameter error - received data field size" }, + { 0x09, "service parameter error - concurrent seq" }, + { 0x0B, "service parameter error - credit" }, + { 0x0D, "invalid N_Port/F_Port_Name" }, + { 0x0E, "invalid node/Fabric Name" }, + { 0x0F, "invalid common service parameters" }, + { 0x11, "invalid association header" }, + { 0x13, "association header required" }, + { 0x15, "invalid originator S_ID" }, + { 0x17, "invalid OX_ID-RX-ID combination" }, + { 0x19, "command (request) already in progress" }, + { 0x1E, "N_Port Login requested" }, + { 0x1F, "Invalid N_Port_ID" }, +}; + +static const struct { + u16 fc_explain; + char *name; +} gs_explain [] = { + { 0x00, "no additional explanation" }, + { 0x01, "port identifier not registered" }, + { 0x02, "port name not registered" }, + { 0x03, "node name not registered" }, + { 0x04, "class of service not registered" }, + { 0x06, "initial process associator not registered" }, + { 0x07, "FC-4 TYPEs not registered" }, + { 0x08, "symbolic port name not registered" }, + { 0x09, "symbolic node name not registered" }, + { 0x0A, "port type not registered" }, + { 0xF0, "authorization exception" }, + { 0xF1, "authentication exception" }, + { 0xF2, "data base full" }, + { 0xF3, "data base empty" }, + { 0xF4, "processing request" }, + { 0xF5, "unable to verify connection" }, + { 0xF6, "devices not in a common zone" }, +}; + +/** + * ibmvfc_get_ls_explain - Return the FC Explain description text + * @status: FC Explain status + * + * Returns: + * error string + **/ +static const char *ibmvfc_get_ls_explain(u16 status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ls_explain); i++) + if (ls_explain[i].fc_explain == status) + return ls_explain[i].name; + + return unknown_fc_explain; +} + +/** + * ibmvfc_get_gs_explain - Return the FC Explain description text + * @status: FC Explain status + * + * Returns: + * error string + **/ +static const char *ibmvfc_get_gs_explain(u16 status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(gs_explain); i++) + if (gs_explain[i].fc_explain == status) + return gs_explain[i].name; + + return unknown_fc_explain; +} + +static const struct { + enum ibmvfc_fc_type fc_type; + char *name; +} fc_type [] = { + { IBMVFC_FABRIC_REJECT, "fabric reject" }, + { IBMVFC_PORT_REJECT, "port reject" }, + { IBMVFC_LS_REJECT, "ELS reject" }, + { IBMVFC_FABRIC_BUSY, "fabric busy" }, + { IBMVFC_PORT_BUSY, "port busy" }, + { IBMVFC_BASIC_REJECT, "basic reject" }, +}; + +static const char *unknown_fc_type = "unknown fc type"; + +/** + * ibmvfc_get_fc_type - Return the FC Type description text + * @status: FC Type error status + * + * Returns: + * error string + **/ +static const char *ibmvfc_get_fc_type(u16 status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(fc_type); i++) + if (fc_type[i].fc_type == status) + return fc_type[i].name; + + return unknown_fc_type; +} + +/** + * ibmvfc_set_tgt_action - Set the next init action for the target + * @tgt: ibmvfc target struct + * @action: action to perform + * + **/ +static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, + enum ibmvfc_target_action action) +{ + switch (tgt->action) { + case IBMVFC_TGT_ACTION_DEL_RPORT: + break; + default: + tgt->action = action; + break; + } +} + +/** + * ibmvfc_set_host_state - Set the state for the host + * @vhost: ibmvfc host struct + * @state: state to set host to + * + * Returns: + * 0 if state changed / non-zero if not changed + **/ +static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, + enum ibmvfc_host_state state) +{ + int rc = 0; + + switch (vhost->state) { + case IBMVFC_HOST_OFFLINE: + rc = -EINVAL; + break; + default: + vhost->state = state; + break; + }; + + return rc; +} + +/** + * ibmvfc_set_host_action - Set the next init action for the host + * @vhost: ibmvfc host struct + * @action: action to perform + * + **/ +static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, + enum ibmvfc_host_action action) +{ + switch (action) { + case IBMVFC_HOST_ACTION_ALLOC_TGTS: + if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) + vhost->action = action; + break; + case IBMVFC_HOST_ACTION_INIT_WAIT: + if (vhost->action == IBMVFC_HOST_ACTION_INIT) + vhost->action = action; + break; + case IBMVFC_HOST_ACTION_QUERY: + switch (vhost->action) { + case IBMVFC_HOST_ACTION_INIT_WAIT: + case IBMVFC_HOST_ACTION_NONE: + case IBMVFC_HOST_ACTION_TGT_ADD: + vhost->action = action; + break; + default: + break; + }; + break; + case IBMVFC_HOST_ACTION_TGT_INIT: + if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) + vhost->action = action; + break; + case IBMVFC_HOST_ACTION_INIT: + case IBMVFC_HOST_ACTION_TGT_DEL: + case IBMVFC_HOST_ACTION_QUERY_TGTS: + case IBMVFC_HOST_ACTION_TGT_ADD: + case IBMVFC_HOST_ACTION_NONE: + default: + vhost->action = action; + break; + }; +} + +/** + * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) + * @vhost: ibmvfc host struct + * + * Return value: + * nothing + **/ +static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) +{ + if (vhost->action == IBMVFC_HOST_ACTION_NONE) { + scsi_block_requests(vhost->host); + ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + } else + vhost->reinit = 1; + + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_link_down - Handle a link down event from the adapter + * @vhost: ibmvfc host struct + * @state: ibmvfc host state to enter + * + **/ +static void ibmvfc_link_down(struct ibmvfc_host *vhost, + enum ibmvfc_host_state state) +{ + struct ibmvfc_target *tgt; + + ENTER; + scsi_block_requests(vhost->host); + list_for_each_entry(tgt, &vhost->targets, queue) + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + ibmvfc_set_host_state(vhost, state); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); + vhost->events_to_log |= IBMVFC_AE_LINKDOWN; + wake_up(&vhost->work_wait_q); + LEAVE; +} + +/** + * ibmvfc_init_host - Start host initialization + * @vhost: ibmvfc host struct + * + * Return value: + * nothing + **/ +static void ibmvfc_init_host(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + + if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { + if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { + dev_err(vhost->dev, + "Host initialization retries exceeded. Taking adapter offline\n"); + ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); + return; + } + } + + if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { + list_for_each_entry(tgt, &vhost->targets, queue) + tgt->need_login = 1; + scsi_block_requests(vhost->host); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); + vhost->job_step = ibmvfc_npiv_login; + wake_up(&vhost->work_wait_q); + } +} + +/** + * ibmvfc_send_crq - Send a CRQ + * @vhost: ibmvfc host struct + * @word1: the first 64 bits of the data + * @word2: the second 64 bits of the data + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) +{ + struct vio_dev *vdev = to_vio_dev(vhost->dev); + return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); +} + +/** + * ibmvfc_send_crq_init - Send a CRQ init message + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) +{ + ibmvfc_dbg(vhost, "Sending CRQ init\n"); + return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); +} + +/** + * ibmvfc_send_crq_init_complete - Send a CRQ init complete message + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) +{ + ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); + return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); +} + +/** + * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ + * @vhost: ibmvfc host struct + * + * Frees irq, deallocates a page for messages, unmaps dma, and unregisters + * the crq with the hypervisor. + **/ +static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) +{ + long rc; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + struct ibmvfc_crq_queue *crq = &vhost->crq; + + ibmvfc_dbg(vhost, "Releasing CRQ\n"); + free_irq(vdev->irq, vhost); + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + vhost->state = IBMVFC_NO_CRQ; + dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); + free_page((unsigned long)crq->msgs); +} + +/** + * ibmvfc_reenable_crq_queue - reenables the CRQ + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) +{ + int rc; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + + /* Re-enable the CRQ */ + do { + rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); + } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + if (rc) + dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); + + return rc; +} + +/** + * ibmvfc_reset_crq - resets a crq after a failure + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) +{ + int rc; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + struct ibmvfc_crq_queue *crq = &vhost->crq; + + /* Close the CRQ */ + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + vhost->state = IBMVFC_NO_CRQ; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + + /* Clean out the queue */ + memset(crq->msgs, 0, PAGE_SIZE); + crq->cur = 0; + + /* And re-open it again */ + rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, + crq->msg_token, PAGE_SIZE); + + if (rc == H_CLOSED) + /* Adapter is good, but other end is not ready */ + dev_warn(vhost->dev, "Partner adapter not ready\n"); + else if (rc != 0) + dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); + + return rc; +} + +/** + * ibmvfc_valid_event - Determines if event is valid. + * @pool: event_pool that contains the event + * @evt: ibmvfc event to be checked for validity + * + * Return value: + * 1 if event is valid / 0 if event is not valid + **/ +static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, + struct ibmvfc_event *evt) +{ + int index = evt - pool->events; + if (index < 0 || index >= pool->size) /* outside of bounds */ + return 0; + if (evt != pool->events + index) /* unaligned */ + return 0; + return 1; +} + +/** + * ibmvfc_free_event - Free the specified event + * @evt: ibmvfc_event to be freed + * + **/ +static void ibmvfc_free_event(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_event_pool *pool = &vhost->pool; + + BUG_ON(!ibmvfc_valid_event(pool, evt)); + BUG_ON(atomic_inc_return(&evt->free) != 1); + list_add_tail(&evt->queue, &vhost->free); +} + +/** + * ibmvfc_scsi_eh_done - EH done function for queuecommand commands + * @evt: ibmvfc event struct + * + * This function does not setup any error status, that must be done + * before this function gets called. + **/ +static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) +{ + struct scsi_cmnd *cmnd = evt->cmnd; + + if (cmnd) { + scsi_dma_unmap(cmnd); + cmnd->scsi_done(cmnd); + } + + ibmvfc_free_event(evt); +} + +/** + * ibmvfc_fail_request - Fail request with specified error code + * @evt: ibmvfc event struct + * @error_code: error code to fail request with + * + * Return value: + * none + **/ +static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) +{ + if (evt->cmnd) { + evt->cmnd->result = (error_code << 16); + evt->done = ibmvfc_scsi_eh_done; + } else + evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; + + list_del(&evt->queue); + del_timer(&evt->timer); + ibmvfc_trc_end(evt); + evt->done(evt); +} + +/** + * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests + * @vhost: ibmvfc host struct + * @error_code: error code to fail requests with + * + * Return value: + * none + **/ +static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) +{ + struct ibmvfc_event *evt, *pos; + + ibmvfc_dbg(vhost, "Purging all requests\n"); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) + ibmvfc_fail_request(evt, error_code); +} + +/** + * __ibmvfc_reset_host - Reset the connection to the server (no locking) + * @vhost: struct ibmvfc host to reset + **/ +static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) +{ + int rc; + + scsi_block_requests(vhost->host); + ibmvfc_purge_requests(vhost, DID_ERROR); + if ((rc = ibmvfc_reset_crq(vhost)) || + (rc = ibmvfc_send_crq_init(vhost)) || + (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { + dev_err(vhost->dev, "Error after reset rc=%d\n", rc); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + } else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); +} + +/** + * ibmvfc_reset_host - Reset the connection to the server + * @vhost: struct ibmvfc host to reset + **/ +static void ibmvfc_reset_host(struct ibmvfc_host *vhost) +{ + unsigned long flags; + + spin_lock_irqsave(vhost->host->host_lock, flags); + __ibmvfc_reset_host(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); +} + +/** + * ibmvfc_retry_host_init - Retry host initialization if allowed + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) +{ + if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { + if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { + dev_err(vhost->dev, + "Host initialization retries exceeded. Taking adapter offline\n"); + ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); + } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) + __ibmvfc_reset_host(vhost); + else + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); + } + + wake_up(&vhost->work_wait_q); +} + +/** + * __ibmvfc_find_target - Find the specified scsi_target (no locking) + * @starget: scsi target struct + * + * Return value: + * ibmvfc_target struct / NULL if not found + **/ +static struct ibmvfc_target *__ibmvfc_find_target(struct scsi_target *starget) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ibmvfc_host *vhost = shost_priv(shost); + struct ibmvfc_target *tgt; + + list_for_each_entry(tgt, &vhost->targets, queue) + if (tgt->target_id == starget->id) + return tgt; + return NULL; +} + +/** + * ibmvfc_find_target - Find the specified scsi_target + * @starget: scsi target struct + * + * Return value: + * ibmvfc_target struct / NULL if not found + **/ +static struct ibmvfc_target *ibmvfc_find_target(struct scsi_target *starget) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ibmvfc_target *tgt; + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + tgt = __ibmvfc_find_target(starget); + spin_unlock_irqrestore(shost->host_lock, flags); + return tgt; +} + +/** + * ibmvfc_get_host_speed - Get host port speed + * @shost: scsi host struct + * + * Return value: + * none + **/ +static void ibmvfc_get_host_speed(struct Scsi_Host *shost) +{ + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + if (vhost->state == IBMVFC_ACTIVE) { + switch (vhost->login_buf->resp.link_speed / 100) { + case 1: + fc_host_speed(shost) = FC_PORTSPEED_1GBIT; + break; + case 2: + fc_host_speed(shost) = FC_PORTSPEED_2GBIT; + break; + case 4: + fc_host_speed(shost) = FC_PORTSPEED_4GBIT; + break; + case 8: + fc_host_speed(shost) = FC_PORTSPEED_8GBIT; + break; + case 10: + fc_host_speed(shost) = FC_PORTSPEED_10GBIT; + break; + case 16: + fc_host_speed(shost) = FC_PORTSPEED_16GBIT; + break; + default: + ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", + vhost->login_buf->resp.link_speed / 100); + fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; + break; + } + } else + fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; + spin_unlock_irqrestore(shost->host_lock, flags); +} + +/** + * ibmvfc_get_host_port_state - Get host port state + * @shost: scsi host struct + * + * Return value: + * none + **/ +static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) +{ + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + switch (vhost->state) { + case IBMVFC_INITIALIZING: + case IBMVFC_ACTIVE: + fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; + break; + case IBMVFC_LINK_DOWN: + fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; + break; + case IBMVFC_LINK_DEAD: + case IBMVFC_HOST_OFFLINE: + fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; + break; + case IBMVFC_HALTED: + fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; + break; + default: + ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); + fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; + break; + } + spin_unlock_irqrestore(shost->host_lock, flags); +} + +/** + * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout + * @rport: rport struct + * @timeout: timeout value + * + * Return value: + * none + **/ +static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) +{ + if (timeout) + rport->dev_loss_tmo = timeout; + else + rport->dev_loss_tmo = 1; +} + +/** + * ibmvfc_get_starget_node_name - Get SCSI target's node name + * @starget: scsi target struct + * + * Return value: + * none + **/ +static void ibmvfc_get_starget_node_name(struct scsi_target *starget) +{ + struct ibmvfc_target *tgt = ibmvfc_find_target(starget); + fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; +} + +/** + * ibmvfc_get_starget_port_name - Get SCSI target's port name + * @starget: scsi target struct + * + * Return value: + * none + **/ +static void ibmvfc_get_starget_port_name(struct scsi_target *starget) +{ + struct ibmvfc_target *tgt = ibmvfc_find_target(starget); + fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; +} + +/** + * ibmvfc_get_starget_port_id - Get SCSI target's port ID + * @starget: scsi target struct + * + * Return value: + * none + **/ +static void ibmvfc_get_starget_port_id(struct scsi_target *starget) +{ + struct ibmvfc_target *tgt = ibmvfc_find_target(starget); + fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; +} + +/** + * ibmvfc_wait_while_resetting - Wait while the host resets + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) +{ + long timeout = wait_event_timeout(vhost->init_wait_q, + (vhost->state == IBMVFC_ACTIVE || + vhost->state == IBMVFC_HOST_OFFLINE || + vhost->state == IBMVFC_LINK_DEAD), + (init_timeout * HZ)); + + return timeout ? 0 : -EIO; +} + +/** + * ibmvfc_issue_fc_host_lip - Re-initiate link initialization + * @shost: scsi host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) +{ + struct ibmvfc_host *vhost = shost_priv(shost); + + dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); + ibmvfc_reset_host(vhost); + return ibmvfc_wait_while_resetting(vhost); +} + +/** + * ibmvfc_gather_partition_info - Gather info about the LPAR + * + * Return value: + * none + **/ +static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) +{ + struct device_node *rootdn; + const char *name; + const unsigned int *num; + + rootdn = of_find_node_by_path("/"); + if (!rootdn) + return; + + name = of_get_property(rootdn, "ibm,partition-name", NULL); + if (name) + strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); + num = of_get_property(rootdn, "ibm,partition-no", NULL); + if (num) + vhost->partition_number = *num; + of_node_put(rootdn); +} + +/** + * ibmvfc_set_login_info - Setup info for NPIV login + * @vhost: ibmvfc host struct + * + * Return value: + * none + **/ +static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) +{ + struct ibmvfc_npiv_login *login_info = &vhost->login_info; + struct device_node *of_node = vhost->dev->archdata.of_node; + const char *location; + + memset(login_info, 0, sizeof(*login_info)); + + login_info->ostype = IBMVFC_OS_LINUX; + login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; + login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); + login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); + login_info->partition_num = vhost->partition_number; + login_info->vfc_frame_version = 1; + login_info->fcp_version = 3; + if (vhost->client_migrated) + login_info->flags = IBMVFC_CLIENT_MIGRATED; + + login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; + login_info->capabilities = IBMVFC_CAN_MIGRATE; + login_info->async.va = vhost->async_crq.msg_token; + login_info->async.len = vhost->async_crq.size; + strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); + strncpy(login_info->device_name, + vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); + + location = of_get_property(of_node, "ibm,loc-code", NULL); + location = location ? location : vhost->dev->bus_id; + strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); +} + +/** + * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host + * @vhost: ibmvfc host who owns the event pool + * + * Returns zero on success. + **/ +static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) +{ + int i; + struct ibmvfc_event_pool *pool = &vhost->pool; + + ENTER; + pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; + pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); + if (!pool->events) + return -ENOMEM; + + pool->iu_storage = dma_alloc_coherent(vhost->dev, + pool->size * sizeof(*pool->iu_storage), + &pool->iu_token, 0); + + if (!pool->iu_storage) { + kfree(pool->events); + return -ENOMEM; + } + + for (i = 0; i < pool->size; ++i) { + struct ibmvfc_event *evt = &pool->events[i]; + atomic_set(&evt->free, 1); + evt->crq.valid = 0x80; + evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); + evt->xfer_iu = pool->iu_storage + i; + evt->vhost = vhost; + evt->ext_list = NULL; + list_add_tail(&evt->queue, &vhost->free); + } + + LEAVE; + return 0; +} + +/** + * ibmvfc_free_event_pool - Frees memory of the event pool of a host + * @vhost: ibmvfc host who owns the event pool + * + **/ +static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) +{ + int i; + struct ibmvfc_event_pool *pool = &vhost->pool; + + ENTER; + for (i = 0; i < pool->size; ++i) { + list_del(&pool->events[i].queue); + BUG_ON(atomic_read(&pool->events[i].free) != 1); + if (pool->events[i].ext_list) + dma_pool_free(vhost->sg_pool, + pool->events[i].ext_list, + pool->events[i].ext_list_token); + } + + kfree(pool->events); + dma_free_coherent(vhost->dev, + pool->size * sizeof(*pool->iu_storage), + pool->iu_storage, pool->iu_token); + LEAVE; +} + +/** + * ibmvfc_get_event - Gets the next free event in pool + * @vhost: ibmvfc host struct + * + * Returns a free event from the pool. + **/ +static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) +{ + struct ibmvfc_event *evt; + + BUG_ON(list_empty(&vhost->free)); + evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); + atomic_set(&evt->free, 0); + list_del(&evt->queue); + return evt; +} + +/** + * ibmvfc_init_event - Initialize fields in an event struct that are always + * required. + * @evt: The event + * @done: Routine to call when the event is responded to + * @format: SRP or MAD format + **/ +static void ibmvfc_init_event(struct ibmvfc_event *evt, + void (*done) (struct ibmvfc_event *), u8 format) +{ + evt->cmnd = NULL; + evt->sync_iu = NULL; + evt->crq.format = format; + evt->done = done; +} + +/** + * ibmvfc_map_sg_list - Initialize scatterlist + * @scmd: scsi command struct + * @nseg: number of scatterlist segments + * @md: memory descriptor list to initialize + **/ +static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, + struct srp_direct_buf *md) +{ + int i; + struct scatterlist *sg; + + scsi_for_each_sg(scmd, sg, nseg, i) { + md[i].va = sg_dma_address(sg); + md[i].len = sg_dma_len(sg); + md[i].key = 0; + } +} + +/** + * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields + * @scmd: Scsi_Cmnd with the scatterlist + * @evt: ibmvfc event struct + * @vfc_cmd: vfc_cmd that contains the memory descriptor + * @dev: device for which to map dma memory + * + * Returns: + * 0 on success / non-zero on failure + **/ +static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, + struct ibmvfc_event *evt, + struct ibmvfc_cmd *vfc_cmd, struct device *dev) +{ + + int sg_mapped; + struct srp_direct_buf *data = &vfc_cmd->ioba; + struct ibmvfc_host *vhost = dev_get_drvdata(dev); + + sg_mapped = scsi_dma_map(scmd); + if (!sg_mapped) { + vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; + return 0; + } else if (unlikely(sg_mapped < 0)) { + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); + return sg_mapped; + } + + if (scmd->sc_data_direction == DMA_TO_DEVICE) { + vfc_cmd->flags |= IBMVFC_WRITE; + vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; + } else { + vfc_cmd->flags |= IBMVFC_READ; + vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; + } + + if (sg_mapped == 1) { + ibmvfc_map_sg_list(scmd, sg_mapped, data); + return 0; + } + + vfc_cmd->flags |= IBMVFC_SCATTERLIST; + + if (!evt->ext_list) { + evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, + &evt->ext_list_token); + + if (!evt->ext_list) { + scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); + return -ENOMEM; + } + } + + ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); + + data->va = evt->ext_list_token; + data->len = sg_mapped * sizeof(struct srp_direct_buf); + data->key = 0; + return 0; +} + +/** + * ibmvfc_timeout - Internal command timeout handler + * @evt: struct ibmvfc_event that timed out + * + * Called when an internally generated command times out + **/ +static void ibmvfc_timeout(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); + ibmvfc_reset_host(vhost); +} + +/** + * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() + * @evt: event to be sent + * @vhost: ibmvfc host struct + * @timeout: timeout in seconds - 0 means do not time command + * + * Returns the value returned from ibmvfc_send_crq(). (Zero for success) + **/ +static int ibmvfc_send_event(struct ibmvfc_event *evt, + struct ibmvfc_host *vhost, unsigned long timeout) +{ + u64 *crq_as_u64 = (u64 *) &evt->crq; + int rc; + + /* Copy the IU into the transfer area */ + *evt->xfer_iu = evt->iu; + if (evt->crq.format == IBMVFC_CMD_FORMAT) + evt->xfer_iu->cmd.tag = (u64)evt; + else if (evt->crq.format == IBMVFC_MAD_FORMAT) + evt->xfer_iu->mad_common.tag = (u64)evt; + else + BUG(); + + list_add_tail(&evt->queue, &vhost->sent); + init_timer(&evt->timer); + + if (timeout) { + evt->timer.data = (unsigned long) evt; + evt->timer.expires = jiffies + (timeout * HZ); + evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; + add_timer(&evt->timer); + } + + if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { + list_del(&evt->queue); + del_timer(&evt->timer); + + /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. + * Firmware will send a CRQ with a transport event (0xFF) to + * tell this client what has happened to the transport. This + * will be handled in ibmvfc_handle_crq() + */ + if (rc == H_CLOSED) { + if (printk_ratelimit()) + dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); + if (evt->cmnd) + scsi_dma_unmap(evt->cmnd); + ibmvfc_free_event(evt); + return SCSI_MLQUEUE_HOST_BUSY; + } + + dev_err(vhost->dev, "Send error (rc=%d)\n", rc); + if (evt->cmnd) { + evt->cmnd->result = DID_ERROR << 16; + evt->done = ibmvfc_scsi_eh_done; + } else + evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; + + evt->done(evt); + } else + ibmvfc_trc_start(evt); + + return 0; +} + +/** + * ibmvfc_log_error - Log an error for the failed command if appropriate + * @evt: ibmvfc event to log + * + **/ +static void ibmvfc_log_error(struct ibmvfc_event *evt) +{ + struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; + struct scsi_cmnd *cmnd = evt->cmnd; + const char *err = unknown_error; + int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); + int logerr = 0; + int rsp_code = 0; + + if (index >= 0) { + logerr = cmd_status[index].log; + err = cmd_status[index].name; + } + + if (!logerr && (vhost->log_level <= IBMVFC_DEFAULT_LOG_LEVEL)) + return; + + if (rsp->flags & FCP_RSP_LEN_VALID) + rsp_code = rsp->data.info.rsp_code; + + scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " + "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", + cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, + rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); +} + +/** + * ibmvfc_scsi_done - Handle responses from commands + * @evt: ibmvfc event to be handled + * + * Used as a callback when sending scsi cmds. + **/ +static void ibmvfc_scsi_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; + struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; + struct scsi_cmnd *cmnd = evt->cmnd; + int rsp_len = 0; + int sense_len = rsp->fcp_sense_len; + + if (cmnd) { + if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) + scsi_set_resid(cmnd, vfc_cmd->adapter_resid); + else if (rsp->flags & FCP_RESID_UNDER) + scsi_set_resid(cmnd, rsp->fcp_resid); + else + scsi_set_resid(cmnd, 0); + + if (vfc_cmd->status) { + cmnd->result = ibmvfc_get_err_result(vfc_cmd); + + if (rsp->flags & FCP_RSP_LEN_VALID) + rsp_len = rsp->fcp_rsp_len; + if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) + sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; + if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len) + memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); + + ibmvfc_log_error(evt); + } + + if (!cmnd->result && + (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) + cmnd->result = (DID_ERROR << 16); + + scsi_dma_unmap(cmnd); + cmnd->scsi_done(cmnd); + } + + ibmvfc_free_event(evt); +} + +/** + * ibmvfc_host_chkready - Check if the host can accept commands + * @vhost: struct ibmvfc host + * + * Returns: + * 1 if host can accept command / 0 if not + **/ +static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) +{ + int result = 0; + + switch (vhost->state) { + case IBMVFC_LINK_DEAD: + case IBMVFC_HOST_OFFLINE: + result = DID_NO_CONNECT << 16; + break; + case IBMVFC_NO_CRQ: + case IBMVFC_INITIALIZING: + case IBMVFC_HALTED: + case IBMVFC_LINK_DOWN: + result = DID_REQUEUE << 16; + break; + case IBMVFC_ACTIVE: + result = 0; + break; + }; + + return result; +} + +/** + * ibmvfc_queuecommand - The queuecommand function of the scsi template + * @cmnd: struct scsi_cmnd to be executed + * @done: Callback function to be called when cmnd is completed + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, + void (*done) (struct scsi_cmnd *)) +{ + struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + struct ibmvfc_cmd *vfc_cmd; + struct ibmvfc_event *evt; + u8 tag[2]; + int rc; + + if (unlikely((rc = fc_remote_port_chkready(rport))) || + unlikely((rc = ibmvfc_host_chkready(vhost)))) { + cmnd->result = rc; + done(cmnd); + return 0; + } + + cmnd->result = (DID_OK << 16); + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); + evt->cmnd = cmnd; + cmnd->scsi_done = done; + vfc_cmd = &evt->iu.cmd; + memset(vfc_cmd, 0, sizeof(*vfc_cmd)); + vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); + vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); + vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; + vfc_cmd->payload_len = sizeof(vfc_cmd->iu); + vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); + vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; + vfc_cmd->tgt_scsi_id = rport->port_id; + if ((rport->supported_classes & FC_COS_CLASS3) && + (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) + vfc_cmd->flags = IBMVFC_CLASS_3_ERR; + vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); + int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); + memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); + + if (scsi_populate_tag_msg(cmnd, tag)) { + vfc_cmd->task_tag = tag[1]; + switch (tag[0]) { + case MSG_SIMPLE_TAG: + vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; + break; + case MSG_HEAD_TAG: + vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; + break; + case MSG_ORDERED_TAG: + vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; + break; + }; + } + + if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) + return ibmvfc_send_event(evt, vhost, 0); + + ibmvfc_free_event(evt); + if (rc == -ENOMEM) + return SCSI_MLQUEUE_HOST_BUSY; + + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + scmd_printk(KERN_ERR, cmnd, + "Failed to map DMA buffer for command. rc=%d\n", rc); + + cmnd->result = DID_ERROR << 16; + done(cmnd); + return 0; +} + +/** + * ibmvfc_sync_completion - Signal that a synchronous command has completed + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_sync_completion(struct ibmvfc_event *evt) +{ + /* copy the response back */ + if (evt->sync_iu) + *evt->sync_iu = *evt->xfer_iu; + + complete(&evt->comp); +} + +/** + * ibmvfc_reset_device - Reset the device with the specified reset type + * @sdev: scsi device to reset + * @type: reset type + * @desc: reset type description for log messages + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) +{ + struct ibmvfc_host *vhost = shost_priv(sdev->host); + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_cmd *tmf; + struct ibmvfc_event *evt; + union ibmvfc_iu rsp_iu; + struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; + int rsp_rc = -EBUSY; + unsigned long flags; + int rsp_code = 0; + + spin_lock_irqsave(vhost->host->host_lock, flags); + if (vhost->state == IBMVFC_ACTIVE) { + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); + + tmf = &evt->iu.cmd; + memset(tmf, 0, sizeof(*tmf)); + tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); + tmf->resp.len = sizeof(tmf->rsp); + tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; + tmf->payload_len = sizeof(tmf->iu); + tmf->resp_len = sizeof(tmf->rsp); + tmf->cancel_key = (unsigned long)sdev->hostdata; + tmf->tgt_scsi_id = rport->port_id; + int_to_scsilun(sdev->lun, &tmf->iu.lun); + tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); + tmf->iu.tmf_flags = type; + evt->sync_iu = &rsp_iu; + + init_completion(&evt->comp); + rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (rsp_rc != 0) { + sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", + desc, rsp_rc); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); + wait_for_completion(&evt->comp); + + if (rsp_iu.cmd.status) { + if (fc_rsp->flags & FCP_RSP_LEN_VALID) + rsp_code = fc_rsp->data.info.rsp_code; + + sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " + "flags: %x fcp_rsp: %x, scsi_status: %x\n", + desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), + rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, + fc_rsp->scsi_status); + rsp_rc = -EIO; + } else + sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); + + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_free_event(evt); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return rsp_rc; +} + +/** + * ibmvfc_abort_task_set - Abort outstanding commands to the device + * @sdev: scsi device to abort commands + * + * This sends an Abort Task Set to the VIOS for the specified device. This does + * NOT send any cancel to the VIOS. That must be done separately. + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_abort_task_set(struct scsi_device *sdev) +{ + struct ibmvfc_host *vhost = shost_priv(sdev->host); + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_cmd *tmf; + struct ibmvfc_event *evt, *found_evt; + union ibmvfc_iu rsp_iu; + struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; + int rsp_rc = -EBUSY; + unsigned long flags; + int rsp_code = 0; + + spin_lock_irqsave(vhost->host->host_lock, flags); + found_evt = NULL; + list_for_each_entry(evt, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == sdev) { + found_evt = evt; + break; + } + } + + if (!found_evt) { + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return 0; + } + + if (vhost->state == IBMVFC_ACTIVE) { + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); + + tmf = &evt->iu.cmd; + memset(tmf, 0, sizeof(*tmf)); + tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); + tmf->resp.len = sizeof(tmf->rsp); + tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; + tmf->payload_len = sizeof(tmf->iu); + tmf->resp_len = sizeof(tmf->rsp); + tmf->cancel_key = (unsigned long)sdev->hostdata; + tmf->tgt_scsi_id = rport->port_id; + int_to_scsilun(sdev->lun, &tmf->iu.lun); + tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); + tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; + evt->sync_iu = &rsp_iu; + + init_completion(&evt->comp); + rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); + } + + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (rsp_rc != 0) { + sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); + wait_for_completion(&evt->comp); + + if (rsp_iu.cmd.status) { + if (fc_rsp->flags & FCP_RSP_LEN_VALID) + rsp_code = fc_rsp->data.info.rsp_code; + + sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " + "flags: %x fcp_rsp: %x, scsi_status: %x\n", + ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), + rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, + fc_rsp->scsi_status); + rsp_rc = -EIO; + } else + sdev_printk(KERN_INFO, sdev, "Abort successful\n"); + + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_free_event(evt); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return rsp_rc; +} + +/** + * ibmvfc_cancel_all - Cancel all outstanding commands to the device + * @sdev: scsi device to cancel commands + * @type: type of error recovery being performed + * + * This sends a cancel to the VIOS for the specified device. This does + * NOT send any abort to the actual device. That must be done separately. + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) +{ + struct ibmvfc_host *vhost = shost_priv(sdev->host); + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_tmf *tmf; + struct ibmvfc_event *evt, *found_evt; + union ibmvfc_iu rsp; + int rsp_rc = -EBUSY; + unsigned long flags; + u16 status; + + ENTER; + spin_lock_irqsave(vhost->host->host_lock, flags); + found_evt = NULL; + list_for_each_entry(evt, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == sdev) { + found_evt = evt; + break; + } + } + + if (!found_evt) { + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return 0; + } + + if (vhost->state == IBMVFC_ACTIVE) { + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); + + tmf = &evt->iu.tmf; + memset(tmf, 0, sizeof(*tmf)); + tmf->common.version = 1; + tmf->common.opcode = IBMVFC_TMF_MAD; + tmf->common.length = sizeof(*tmf); + tmf->scsi_id = rport->port_id; + int_to_scsilun(sdev->lun, &tmf->lun); + tmf->flags = (type | IBMVFC_TMF_LUA_VALID); + tmf->cancel_key = (unsigned long)sdev->hostdata; + tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata); + + evt->sync_iu = &rsp; + init_completion(&evt->comp); + rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); + } + + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (rsp_rc != 0) { + sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); + + wait_for_completion(&evt->comp); + status = rsp.mad_common.status; + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_free_event(evt); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (status != IBMVFC_MAD_SUCCESS) { + sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); + return 0; +} + +/** + * ibmvfc_eh_abort_handler - Abort a command + * @cmd: scsi command to abort + * + * Returns: + * SUCCESS / FAILED + **/ +static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) +{ + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + struct ibmvfc_event *evt, *pos; + int cancel_rc, abort_rc; + unsigned long flags; + + ENTER; + ibmvfc_wait_while_resetting(vhost); + cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET); + abort_rc = ibmvfc_abort_task_set(cmd->device); + + if (!cancel_rc && !abort_rc) { + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == cmd->device) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + LEAVE; + return SUCCESS; + } + + LEAVE; + return FAILED; +} + +/** + * ibmvfc_eh_device_reset_handler - Reset a single LUN + * @cmd: scsi command struct + * + * Returns: + * SUCCESS / FAILED + **/ +static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) +{ + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + struct ibmvfc_event *evt, *pos; + int cancel_rc, reset_rc; + unsigned long flags; + + ENTER; + ibmvfc_wait_while_resetting(vhost); + cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET); + reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN"); + + if (!cancel_rc && !reset_rc) { + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == cmd->device) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + LEAVE; + return SUCCESS; + } + + LEAVE; + return FAILED; +} + +/** + * ibmvfc_dev_cancel_all - Device iterated cancel all function + * @sdev: scsi device struct + * @data: return code + * + **/ +static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) +{ + unsigned long *rc = data; + *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); +} + +/** + * ibmvfc_dev_abort_all - Device iterated abort task set function + * @sdev: scsi device struct + * @data: return code + * + **/ +static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) +{ + unsigned long *rc = data; + *rc |= ibmvfc_abort_task_set(sdev); +} + +/** + * ibmvfc_eh_target_reset_handler - Reset the target + * @cmd: scsi command struct + * + * Returns: + * SUCCESS / FAILED + **/ +static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) +{ + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + struct scsi_target *starget = scsi_target(cmd->device); + struct ibmvfc_event *evt, *pos; + int reset_rc; + unsigned long cancel_rc = 0; + unsigned long flags; + + ENTER; + ibmvfc_wait_while_resetting(vhost); + starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); + reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target"); + + if (!cancel_rc && !reset_rc) { + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + LEAVE; + return SUCCESS; + } + + LEAVE; + return FAILED; +} + +/** + * ibmvfc_eh_host_reset_handler - Reset the connection to the server + * @cmd: struct scsi_cmnd having problems + * + **/ +static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) +{ + int rc; + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + + dev_err(vhost->dev, "Resetting connection due to error recovery\n"); + rc = ibmvfc_issue_fc_host_lip(vhost->host); + return rc ? FAILED : SUCCESS; +} + +/** + * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. + * @rport: rport struct + * + * Return value: + * none + **/ +static void ibmvfc_terminate_rport_io(struct fc_rport *rport) +{ + struct scsi_target *starget = to_scsi_target(&rport->dev); + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ibmvfc_host *vhost = shost_priv(shost); + struct ibmvfc_event *evt, *pos; + unsigned long cancel_rc = 0; + unsigned long abort_rc = 0; + unsigned long flags; + + ENTER; + starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); + starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); + + if (!cancel_rc && !abort_rc) { + spin_lock_irqsave(shost->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(shost->host_lock, flags); + } else + ibmvfc_issue_fc_host_lip(shost); + + scsi_target_unblock(&rport->dev); + LEAVE; +} + +static const struct { + enum ibmvfc_async_event ae; + const char *desc; +} ae_desc [] = { + { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, + { IBMVFC_AE_ELS_LOGO, "LOGO" }, + { IBMVFC_AE_ELS_PRLO, "PRLO" }, + { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, + { IBMVFC_AE_SCN_GROUP, "Group SCN" }, + { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, + { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, + { IBMVFC_AE_LINK_UP, "Link Up" }, + { IBMVFC_AE_LINK_DOWN, "Link Down" }, + { IBMVFC_AE_LINK_DEAD, "Link Dead" }, + { IBMVFC_AE_HALT, "Halt" }, + { IBMVFC_AE_RESUME, "Resume" }, + { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, +}; + +static const char *unknown_ae = "Unknown async"; + +/** + * ibmvfc_get_ae_desc - Get text description for async event + * @ae: async event + * + **/ +static const char *ibmvfc_get_ae_desc(u64 ae) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ae_desc); i++) + if (ae_desc[i].ae == ae) + return ae_desc[i].desc; + + return unknown_ae; +} + +/** + * ibmvfc_handle_async - Handle an async event from the adapter + * @crq: crq to process + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, + struct ibmvfc_host *vhost) +{ + const char *desc = ibmvfc_get_ae_desc(crq->event); + + ibmvfc_log(vhost, 2, "%s event received\n", desc); + + switch (crq->event) { + case IBMVFC_AE_LINK_UP: + case IBMVFC_AE_RESUME: + vhost->events_to_log |= IBMVFC_AE_LINKUP; + ibmvfc_init_host(vhost); + break; + case IBMVFC_AE_SCN_FABRIC: + vhost->events_to_log |= IBMVFC_AE_RSCN; + ibmvfc_init_host(vhost); + break; + case IBMVFC_AE_SCN_NPORT: + case IBMVFC_AE_SCN_GROUP: + case IBMVFC_AE_SCN_DOMAIN: + vhost->events_to_log |= IBMVFC_AE_RSCN; + case IBMVFC_AE_ELS_LOGO: + case IBMVFC_AE_ELS_PRLO: + case IBMVFC_AE_ELS_PLOGI: + ibmvfc_reinit_host(vhost); + break; + case IBMVFC_AE_LINK_DOWN: + case IBMVFC_AE_ADAPTER_FAILED: + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); + break; + case IBMVFC_AE_LINK_DEAD: + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + break; + case IBMVFC_AE_HALT: + ibmvfc_link_down(vhost, IBMVFC_HALTED); + break; + default: + dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); + break; + }; +} + +/** + * ibmvfc_handle_crq - Handles and frees received events in the CRQ + * @crq: Command/Response queue + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) +{ + long rc; + struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; + + switch (crq->valid) { + case IBMVFC_CRQ_INIT_RSP: + switch (crq->format) { + case IBMVFC_CRQ_INIT: + dev_info(vhost->dev, "Partner initialized\n"); + /* Send back a response */ + rc = ibmvfc_send_crq_init_complete(vhost); + if (rc == 0) + ibmvfc_init_host(vhost); + else + dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); + break; + case IBMVFC_CRQ_INIT_COMPLETE: + dev_info(vhost->dev, "Partner initialization complete\n"); + ibmvfc_init_host(vhost); + break; + default: + dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); + } + return; + case IBMVFC_CRQ_XPORT_EVENT: + vhost->state = IBMVFC_NO_CRQ; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + if (crq->format == IBMVFC_PARTITION_MIGRATED) { + /* We need to re-setup the interpartition connection */ + dev_info(vhost->dev, "Re-enabling adapter\n"); + vhost->client_migrated = 1; + ibmvfc_purge_requests(vhost, DID_REQUEUE); + if ((rc = ibmvfc_reenable_crq_queue(vhost)) || + (rc = ibmvfc_send_crq_init(vhost))) { + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); + } else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); + } else { + dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); + + ibmvfc_purge_requests(vhost, DID_ERROR); + if ((rc = ibmvfc_reset_crq(vhost)) || + (rc = ibmvfc_send_crq_init(vhost))) { + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); + } else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); + } + return; + case IBMVFC_CRQ_CMD_RSP: + break; + default: + dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); + return; + } + + if (crq->format == IBMVFC_ASYNC_EVENT) + return; + + /* The only kind of payload CRQs we should get are responses to + * things we send. Make sure this response is to something we + * actually sent + */ + if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { + dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", + crq->ioba); + return; + } + + if (unlikely(atomic_read(&evt->free))) { + dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", + crq->ioba); + return; + } + + del_timer(&evt->timer); + list_del(&evt->queue); + ibmvfc_trc_end(evt); + evt->done(evt); +} + +/** + * ibmvfc_scan_finished - Check if the device scan is done. + * @shost: scsi host struct + * @time: current elapsed time + * + * Returns: + * 0 if scan is not done / 1 if scan is done + **/ +static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) +{ + unsigned long flags; + struct ibmvfc_host *vhost = shost_priv(shost); + int done = 0; + + spin_lock_irqsave(shost->host_lock, flags); + if (time >= (init_timeout * HZ)) { + dev_info(vhost->dev, "Scan taking longer than %d seconds, " + "continuing initialization\n", init_timeout); + done = 1; + } + + if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) + done = 1; + spin_unlock_irqrestore(shost->host_lock, flags); + return done; +} + +/** + * ibmvfc_slave_alloc - Setup the device's task set value + * @sdev: struct scsi_device device to configure + * + * Set the device's task set value so that error handling works as + * expected. + * + * Returns: + * 0 on success / -ENXIO if device does not exist + **/ +static int ibmvfc_slave_alloc(struct scsi_device *sdev) +{ + struct Scsi_Host *shost = sdev->host; + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + + if (!rport || fc_remote_port_chkready(rport)) + return -ENXIO; + + spin_lock_irqsave(shost->host_lock, flags); + sdev->hostdata = (void *)(unsigned long)vhost->task_set++; + spin_unlock_irqrestore(shost->host_lock, flags); + return 0; +} + +/** + * ibmvfc_slave_configure - Configure the device + * @sdev: struct scsi_device device to configure + * + * Enable allow_restart for a device if it is a disk. Adjust the + * queue_depth here also. + * + * Returns: + * 0 + **/ +static int ibmvfc_slave_configure(struct scsi_device *sdev) +{ + struct Scsi_Host *shost = sdev->host; + struct fc_rport *rport = starget_to_rport(sdev->sdev_target); + unsigned long flags = 0; + + spin_lock_irqsave(shost->host_lock, flags); + if (sdev->type == TYPE_DISK) + sdev->allow_restart = 1; + + if (sdev->tagged_supported) { + scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); + scsi_activate_tcq(sdev, sdev->queue_depth); + } else + scsi_deactivate_tcq(sdev, sdev->queue_depth); + + rport->dev_loss_tmo = dev_loss_tmo; + spin_unlock_irqrestore(shost->host_lock, flags); + return 0; +} + +/** + * ibmvfc_change_queue_depth - Change the device's queue depth + * @sdev: scsi device struct + * @qdepth: depth to set + * + * Return value: + * actual depth set + **/ +static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) +{ + if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) + qdepth = IBMVFC_MAX_CMDS_PER_LUN; + + scsi_adjust_queue_depth(sdev, 0, qdepth); + return sdev->queue_depth; +} + +/** + * ibmvfc_change_queue_type - Change the device's queue type + * @sdev: scsi device struct + * @tag_type: type of tags to use + * + * Return value: + * actual queue type set + **/ +static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) +{ + if (sdev->tagged_supported) { + scsi_set_tag_type(sdev, tag_type); + + if (tag_type) + scsi_activate_tcq(sdev, sdev->queue_depth); + else + scsi_deactivate_tcq(sdev, sdev->queue_depth); + } else + tag_type = 0; + + return tag_type; +} + +static ssize_t ibmvfc_show_host_partition_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.partition_name); +} + +static struct device_attribute ibmvfc_host_partition_name = { + .attr = { + .name = "partition_name", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_partition_name, +}; + +static ssize_t ibmvfc_show_host_device_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.device_name); +} + +static struct device_attribute ibmvfc_host_device_name = { + .attr = { + .name = "device_name", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_device_name, +}; + +static ssize_t ibmvfc_show_host_loc_code(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.port_loc_code); +} + +static struct device_attribute ibmvfc_host_loc_code = { + .attr = { + .name = "port_loc_code", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_loc_code, +}; + +static ssize_t ibmvfc_show_host_drc_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.drc_name); +} + +static struct device_attribute ibmvfc_host_drc_name = { + .attr = { + .name = "drc_name", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_drc_name, +}; + +static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); +} + +static struct device_attribute ibmvfc_host_npiv_version = { + .attr = { + .name = "npiv_version", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_npiv_version, +}; + +/** + * ibmvfc_show_log_level - Show the adapter's error logging level + * @dev: class device struct + * @buf: buffer + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ibmvfc_show_log_level(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + int len; + + spin_lock_irqsave(shost->host_lock, flags); + len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); + spin_unlock_irqrestore(shost->host_lock, flags); + return len; +} + +/** + * ibmvfc_store_log_level - Change the adapter's error logging level + * @dev: class device struct + * @buf: buffer + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ibmvfc_store_log_level(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + + spin_lock_irqsave(shost->host_lock, flags); + vhost->log_level = simple_strtoul(buf, NULL, 10); + spin_unlock_irqrestore(shost->host_lock, flags); + return strlen(buf); +} + +static struct device_attribute ibmvfc_log_level_attr = { + .attr = { + .name = "log_level", + .mode = S_IRUGO | S_IWUSR, + }, + .show = ibmvfc_show_log_level, + .store = ibmvfc_store_log_level +}; + +#ifdef CONFIG_SCSI_IBMVFC_TRACE +/** + * ibmvfc_read_trace - Dump the adapter trace + * @kobj: kobject struct + * @bin_attr: bin_attribute struct + * @buf: buffer + * @off: offset + * @count: buffer size + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ibmvfc_read_trace(struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + int size = IBMVFC_TRACE_SIZE; + char *src = (char *)vhost->trace; + + if (off > size) + return 0; + if (off + count > size) { + size -= off; + count = size; + } + + spin_lock_irqsave(shost->host_lock, flags); + memcpy(buf, &src[off], count); + spin_unlock_irqrestore(shost->host_lock, flags); + return count; +} + +static struct bin_attribute ibmvfc_trace_attr = { + .attr = { + .name = "trace", + .mode = S_IRUGO, + }, + .size = 0, + .read = ibmvfc_read_trace, +}; +#endif + +static struct device_attribute *ibmvfc_attrs[] = { + &ibmvfc_host_partition_name, + &ibmvfc_host_device_name, + &ibmvfc_host_loc_code, + &ibmvfc_host_drc_name, + &ibmvfc_host_npiv_version, + &ibmvfc_log_level_attr, + NULL +}; + +static struct scsi_host_template driver_template = { + .module = THIS_MODULE, + .name = "IBM POWER Virtual FC Adapter", + .proc_name = IBMVFC_NAME, + .queuecommand = ibmvfc_queuecommand, + .eh_abort_handler = ibmvfc_eh_abort_handler, + .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, + .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, + .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, + .slave_alloc = ibmvfc_slave_alloc, + .slave_configure = ibmvfc_slave_configure, + .scan_finished = ibmvfc_scan_finished, + .change_queue_depth = ibmvfc_change_queue_depth, + .change_queue_type = ibmvfc_change_queue_type, + .cmd_per_lun = 16, + .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, + .this_id = -1, + .sg_tablesize = SG_ALL, + .max_sectors = IBMVFC_MAX_SECTORS, + .use_clustering = ENABLE_CLUSTERING, + .shost_attrs = ibmvfc_attrs, +}; + +/** + * ibmvfc_next_async_crq - Returns the next entry in async queue + * @vhost: ibmvfc host struct + * + * Returns: + * Pointer to next entry in queue / NULL if empty + **/ +static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) +{ + struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; + struct ibmvfc_async_crq *crq; + + crq = &async_crq->msgs[async_crq->cur]; + if (crq->valid & 0x80) { + if (++async_crq->cur == async_crq->size) + async_crq->cur = 0; + } else + crq = NULL; + + return crq; +} + +/** + * ibmvfc_next_crq - Returns the next entry in message queue + * @vhost: ibmvfc host struct + * + * Returns: + * Pointer to next entry in queue / NULL if empty + **/ +static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) +{ + struct ibmvfc_crq_queue *queue = &vhost->crq; + struct ibmvfc_crq *crq; + + crq = &queue->msgs[queue->cur]; + if (crq->valid & 0x80) { + if (++queue->cur == queue->size) + queue->cur = 0; + } else + crq = NULL; + + return crq; +} + +/** + * ibmvfc_interrupt - Interrupt handler + * @irq: number of irq to handle, not used + * @dev_instance: ibmvfc_host that received interrupt + * + * Returns: + * IRQ_HANDLED + **/ +static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) +{ + struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + struct ibmvfc_crq *crq; + struct ibmvfc_async_crq *async; + unsigned long flags; + int done = 0; + + spin_lock_irqsave(vhost->host->host_lock, flags); + vio_disable_interrupts(to_vio_dev(vhost->dev)); + while (!done) { + /* Pull all the valid messages off the CRQ */ + while ((crq = ibmvfc_next_crq(vhost)) != NULL) { + ibmvfc_handle_crq(crq, vhost); + crq->valid = 0; + } + + /* Pull all the valid messages off the async CRQ */ + while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { + ibmvfc_handle_async(async, vhost); + async->valid = 0; + } + + vio_enable_interrupts(vdev); + if ((crq = ibmvfc_next_crq(vhost)) != NULL) { + vio_disable_interrupts(vdev); + ibmvfc_handle_crq(crq, vhost); + crq->valid = 0; + } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { + vio_disable_interrupts(vdev); + ibmvfc_handle_async(async, vhost); + crq->valid = 0; + } else + done = 1; + } + + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return IRQ_HANDLED; +} + +/** + * ibmvfc_init_tgt - Set the next init job step for the target + * @tgt: ibmvfc target struct + * @job_step: job step to perform + * + **/ +static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, + void (*job_step) (struct ibmvfc_target *)) +{ + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); + tgt->job_step = job_step; + wake_up(&tgt->vhost->work_wait_q); +} + +/** + * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization + * @tgt: ibmvfc target struct + * @job_step: initialization job step + * + **/ +static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, + void (*job_step) (struct ibmvfc_target *)) +{ + if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + wake_up(&tgt->vhost->work_wait_q); + } else + ibmvfc_init_tgt(tgt, job_step); +} + +/** + * ibmvfc_release_tgt - Free memory allocated for a target + * @kref: kref struct + * + **/ +static void ibmvfc_release_tgt(struct kref *kref) +{ + struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); + kfree(tgt); +} + +/** + * ibmvfc_tgt_prli_done - Completion handler for Process Login + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Process Login succeeded\n"); + tgt->need_login = 0; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); + break; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), + rsp->status, rsp->error, status); + if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); + break; + }; + + kref_put(&tgt->kref, ibmvfc_release_tgt); + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_send_prli - Send a process login + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) +{ + struct ibmvfc_process_login *prli; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); + evt->tgt = tgt; + prli = &evt->iu.prli; + memset(prli, 0, sizeof(*prli)); + prli->common.version = 1; + prli->common.opcode = IBMVFC_PROCESS_LOGIN; + prli->common.length = sizeof(*prli); + prli->scsi_id = tgt->scsi_id; + + prli->parms.type = IBMVFC_SCSI_FCP_TYPE; + prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; + prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; + + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent process login\n"); +} + +/** + * ibmvfc_tgt_plogi_done - Completion handler for Port Login + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Port Login succeeded\n"); + if (tgt->ids.port_name && + tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { + vhost->reinit = 1; + tgt_dbg(tgt, "Port re-init required\n"); + break; + } + tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); + tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); + tgt->ids.port_id = tgt->scsi_id; + tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; + memcpy(&tgt->service_parms, &rsp->service_parms, + sizeof(tgt->service_parms)); + memcpy(&tgt->service_parms_change, &rsp->service_parms_change, + sizeof(tgt->service_parms_change)); + ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); + break; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, + ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, + ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); + + if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); + break; + }; + + kref_put(&tgt->kref, ibmvfc_release_tgt); + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) +{ + struct ibmvfc_port_login *plogi; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); + evt->tgt = tgt; + plogi = &evt->iu.plogi; + memset(plogi, 0, sizeof(*plogi)); + plogi->common.version = 1; + plogi->common.opcode = IBMVFC_PORT_LOGIN; + plogi->common.length = sizeof(*plogi); + plogi->scsi_id = tgt->scsi_id; + + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent port login\n"); +} + +/** + * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_free_event(evt); + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Implicit Logout succeeded\n"); + break; + case IBMVFC_MAD_DRIVER_FAILED: + kref_put(&tgt->kref, ibmvfc_release_tgt); + wake_up(&vhost->work_wait_q); + return; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); + break; + }; + + if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); + else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && + tgt->scsi_id != tgt->new_scsi_id) + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + kref_put(&tgt->kref, ibmvfc_release_tgt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) +{ + struct ibmvfc_implicit_logout *mad; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); + evt->tgt = tgt; + mad = &evt->iu.implicit_logout; + memset(mad, 0, sizeof(*mad)); + mad->common.version = 1; + mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; + mad->common.length = sizeof(*mad); + mad->old_scsi_id = tgt->scsi_id; + + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent Implicit Logout\n"); +} + +/** + * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Query Target succeeded\n"); + tgt->new_scsi_id = rsp->scsi_id; + if (rsp->scsi_id != tgt->scsi_id) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); + break; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, + ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, + ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); + + if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && + rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && + rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); + break; + }; + + kref_put(&tgt->kref, ibmvfc_release_tgt); + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_query_target - Initiate a Query Target for specified target + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) +{ + struct ibmvfc_query_tgt *query_tgt; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + evt->tgt = tgt; + ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); + query_tgt = &evt->iu.query_tgt; + memset(query_tgt, 0, sizeof(*query_tgt)); + query_tgt->common.version = 1; + query_tgt->common.opcode = IBMVFC_QUERY_TARGET; + query_tgt->common.length = sizeof(*query_tgt); + query_tgt->wwpn = tgt->ids.port_name; + + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent Query Target\n"); +} + +/** + * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target + * @vhost: ibmvfc host struct + * @scsi_id: SCSI ID to allocate target for + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) +{ + struct ibmvfc_target *tgt; + unsigned long flags; + + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->scsi_id == scsi_id) { + if (tgt->need_login) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); + goto unlock_out; + } + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); + if (!tgt) { + dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", + scsi_id); + return -ENOMEM; + } + + tgt->scsi_id = scsi_id; + tgt->new_scsi_id = scsi_id; + tgt->vhost = vhost; + tgt->need_login = 1; + kref_init(&tgt->kref); + ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); + spin_lock_irqsave(vhost->host->host_lock, flags); + list_add_tail(&tgt->queue, &vhost->targets); + +unlock_out: + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return 0; +} + +/** + * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets + * @vhost: ibmvfc host struct + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) +{ + int i, rc; + + for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) + rc = ibmvfc_alloc_target(vhost, + vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); + + return rc; +} + +/** + * ibmvfc_discover_targets_done - Completion handler for discover targets MAD + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; + u32 mad_status = rsp->common.status; + + switch (mad_status) { + case IBMVFC_MAD_SUCCESS: + ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); + vhost->num_targets = rsp->num_written; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); + break; + case IBMVFC_MAD_FAILED: + dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); + ibmvfc_retry_host_init(vhost); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + default: + dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + break; + } + + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_discover_targets - Send Discover Targets MAD + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) +{ + struct ibmvfc_discover_targets *mad; + struct ibmvfc_event *evt = ibmvfc_get_event(vhost); + + ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); + mad = &evt->iu.discover_targets; + memset(mad, 0, sizeof(*mad)); + mad->common.version = 1; + mad->common.opcode = IBMVFC_DISC_TARGETS; + mad->common.length = sizeof(*mad); + mad->bufflen = vhost->disc_buf_sz; + mad->buffer.va = vhost->disc_buf_dma; + mad->buffer.len = vhost->disc_buf_sz; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); + + if (!ibmvfc_send_event(evt, vhost, default_timeout)) + ibmvfc_dbg(vhost, "Sent discover targets\n"); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); +} + +/** + * ibmvfc_npiv_login_done - Completion handler for NPIV Login + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + u32 mad_status = evt->xfer_iu->npiv_login.common.status; + struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; + unsigned int npiv_max_sectors; + + switch (mad_status) { + case IBMVFC_MAD_SUCCESS: + ibmvfc_free_event(evt); + break; + case IBMVFC_MAD_FAILED: + dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); + if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_host_init(vhost); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + ibmvfc_free_event(evt); + return; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_host_init(vhost); + case IBMVFC_MAD_DRIVER_FAILED: + ibmvfc_free_event(evt); + return; + default: + dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + ibmvfc_free_event(evt); + return; + } + + vhost->client_migrated = 0; + + if (!(rsp->flags & IBMVFC_NATIVE_FC)) { + dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", + rsp->flags); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + wake_up(&vhost->work_wait_q); + return; + } + + if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { + dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", + rsp->max_cmds); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + wake_up(&vhost->work_wait_q); + return; + } + + npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); + dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", + rsp->partition_name, rsp->device_name, rsp->port_loc_code, + rsp->drc_name, npiv_max_sectors); + + fc_host_fabric_name(vhost->host) = rsp->node_name; + fc_host_node_name(vhost->host) = rsp->node_name; + fc_host_port_name(vhost->host) = rsp->port_name; + fc_host_port_id(vhost->host) = rsp->scsi_id; + fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; + fc_host_supported_classes(vhost->host) = 0; + if (rsp->service_parms.class1_parms[0] & 0x80000000) + fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; + if (rsp->service_parms.class2_parms[0] & 0x80000000) + fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; + if (rsp->service_parms.class3_parms[0] & 0x80000000) + fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; + fc_host_maxframe_size(vhost->host) = + rsp->service_parms.common.bb_rcv_sz & 0x0fff; + + vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; + vhost->host->max_sectors = npiv_max_sectors; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_npiv_login - Sends NPIV login + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) +{ + struct ibmvfc_npiv_login_mad *mad; + struct ibmvfc_event *evt = ibmvfc_get_event(vhost); + + ibmvfc_gather_partition_info(vhost); + ibmvfc_set_login_info(vhost); + ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); + + memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); + mad = &evt->iu.npiv_login; + memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); + mad->common.version = 1; + mad->common.opcode = IBMVFC_NPIV_LOGIN; + mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); + mad->buffer.va = vhost->login_buf_dma; + mad->buffer.len = sizeof(*vhost->login_buf); + + memset(vhost->async_crq.msgs, 0, PAGE_SIZE); + vhost->async_crq.cur = 0; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); + + if (!ibmvfc_send_event(evt, vhost, default_timeout)) + ibmvfc_dbg(vhost, "Sent NPIV login\n"); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); +}; + +/** + * ibmvfc_dev_init_to_do - Is there target initialization work to do? + * @vhost: ibmvfc host struct + * + * Returns: + * 1 if work to do / 0 if not + **/ +static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_INIT || + tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) + return 1; + } + + return 0; +} + +/** + * __ibmvfc_work_to_do - Is there task level work to do? (no locking) + * @vhost: ibmvfc host struct + * + * Returns: + * 1 if work to do / 0 if not + **/ +static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + + if (kthread_should_stop()) + return 1; + switch (vhost->action) { + case IBMVFC_HOST_ACTION_NONE: + case IBMVFC_HOST_ACTION_INIT_WAIT: + return 0; + case IBMVFC_HOST_ACTION_TGT_INIT: + case IBMVFC_HOST_ACTION_QUERY_TGTS: + if (vhost->discovery_threads == disc_threads) + return 0; + list_for_each_entry(tgt, &vhost->targets, queue) + if (tgt->action == IBMVFC_TGT_ACTION_INIT) + return 1; + list_for_each_entry(tgt, &vhost->targets, queue) + if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) + return 0; + return 1; + case IBMVFC_HOST_ACTION_INIT: + case IBMVFC_HOST_ACTION_ALLOC_TGTS: + case IBMVFC_HOST_ACTION_TGT_ADD: + case IBMVFC_HOST_ACTION_TGT_DEL: + case IBMVFC_HOST_ACTION_QUERY: + default: + break; + }; + + return 1; +} + +/** + * ibmvfc_work_to_do - Is there task level work to do? + * @vhost: ibmvfc host struct + * + * Returns: + * 1 if work to do / 0 if not + **/ +static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) +{ + unsigned long flags; + int rc; + + spin_lock_irqsave(vhost->host->host_lock, flags); + rc = __ibmvfc_work_to_do(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return rc; +} + +/** + * ibmvfc_log_ae - Log async events if necessary + * @vhost: ibmvfc host struct + * @events: events to log + * + **/ +static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) +{ + if (events & IBMVFC_AE_RSCN) + fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); + if ((events & IBMVFC_AE_LINKDOWN) && + vhost->state >= IBMVFC_HALTED) + fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); + if ((events & IBMVFC_AE_LINKUP) && + vhost->state == IBMVFC_INITIALIZING) + fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); +} + +/** + * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) +{ + struct ibmvfc_host *vhost = tgt->vhost; + struct fc_rport *rport; + unsigned long flags; + + tgt_dbg(tgt, "Adding rport\n"); + rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); + spin_lock_irqsave(vhost->host->host_lock, flags); + tgt->rport = rport; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + if (rport) { + tgt_dbg(tgt, "rport add succeeded\n"); + rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; + rport->supported_classes = 0; + if (tgt->service_parms.class1_parms[0] & 0x80000000) + rport->supported_classes |= FC_COS_CLASS1; + if (tgt->service_parms.class2_parms[0] & 0x80000000) + rport->supported_classes |= FC_COS_CLASS2; + if (tgt->service_parms.class3_parms[0] & 0x80000000) + rport->supported_classes |= FC_COS_CLASS3; + } else + tgt_dbg(tgt, "rport add failed\n"); + spin_unlock_irqrestore(vhost->host->host_lock, flags); +} + +/** + * ibmvfc_do_work - Do task level work + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_do_work(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + unsigned long flags; + struct fc_rport *rport; + + ibmvfc_log_ae(vhost, vhost->events_to_log); + spin_lock_irqsave(vhost->host->host_lock, flags); + vhost->events_to_log = 0; + switch (vhost->action) { + case IBMVFC_HOST_ACTION_NONE: + case IBMVFC_HOST_ACTION_INIT_WAIT: + break; + case IBMVFC_HOST_ACTION_INIT: + BUG_ON(vhost->state != IBMVFC_INITIALIZING); + vhost->job_step(vhost); + break; + case IBMVFC_HOST_ACTION_QUERY: + list_for_each_entry(tgt, &vhost->targets, queue) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); + break; + case IBMVFC_HOST_ACTION_QUERY_TGTS: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_INIT) { + tgt->job_step(tgt); + break; + } + } + + if (!ibmvfc_dev_init_to_do(vhost)) + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); + break; + case IBMVFC_HOST_ACTION_TGT_DEL: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { + tgt_dbg(tgt, "Deleting rport\n"); + rport = tgt->rport; + tgt->rport = NULL; + list_del(&tgt->queue); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + if (rport) + fc_remote_port_delete(rport); + kref_put(&tgt->kref, ibmvfc_release_tgt); + return; + } + } + + if (vhost->state == IBMVFC_INITIALIZING) { + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); + vhost->job_step = ibmvfc_discover_targets; + } else { + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + scsi_unblock_requests(vhost->host); + wake_up(&vhost->init_wait_q); + return; + } + break; + case IBMVFC_HOST_ACTION_ALLOC_TGTS: + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + ibmvfc_alloc_targets(vhost); + spin_lock_irqsave(vhost->host->host_lock, flags); + break; + case IBMVFC_HOST_ACTION_TGT_INIT: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_INIT) { + tgt->job_step(tgt); + break; + } + } + + if (!ibmvfc_dev_init_to_do(vhost)) { + ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); + vhost->init_retries = 0; + spin_unlock_irqrestore(vhost->host->host_lock, flags); + scsi_unblock_requests(vhost->host); + return; + } + break; + case IBMVFC_HOST_ACTION_TGT_ADD: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { + spin_unlock_irqrestore(vhost->host->host_lock, flags); + ibmvfc_tgt_add_rport(tgt); + return; + } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { + tgt_dbg(tgt, "Deleting rport\n"); + rport = tgt->rport; + tgt->rport = NULL; + list_del(&tgt->queue); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + if (rport) + fc_remote_port_delete(rport); + kref_put(&tgt->kref, ibmvfc_release_tgt); + return; + } + } + + if (vhost->reinit) { + vhost->reinit = 0; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + } else { + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + wake_up(&vhost->init_wait_q); + } + break; + default: + break; + }; + + spin_unlock_irqrestore(vhost->host->host_lock, flags); +} + +/** + * ibmvfc_work - Do task level work + * @data: ibmvfc host struct + * + * Returns: + * zero + **/ +static int ibmvfc_work(void *data) +{ + struct ibmvfc_host *vhost = data; + int rc; + + set_user_nice(current, -20); + + while (1) { + rc = wait_event_interruptible(vhost->work_wait_q, + ibmvfc_work_to_do(vhost)); + + BUG_ON(rc); + + if (kthread_should_stop()) + break; + + ibmvfc_do_work(vhost); + } + + ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); + return 0; +} + +/** + * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor + * @vhost: ibmvfc host struct + * + * Allocates a page for messages, maps it for dma, and registers + * the crq with the hypervisor. + * + * Return value: + * zero on success / other on failure + **/ +static int ibmvfc_init_crq(struct ibmvfc_host *vhost) +{ + int rc, retrc = -ENOMEM; + struct device *dev = vhost->dev; + struct vio_dev *vdev = to_vio_dev(dev); + struct ibmvfc_crq_queue *crq = &vhost->crq; + + ENTER; + crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); + + if (!crq->msgs) + return -ENOMEM; + + crq->size = PAGE_SIZE / sizeof(*crq->msgs); + crq->msg_token = dma_map_single(dev, crq->msgs, + PAGE_SIZE, DMA_BIDIRECTIONAL); + + if (dma_mapping_error(crq->msg_token)) + goto map_failed; + + retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, + crq->msg_token, PAGE_SIZE); + + if (rc == H_RESOURCE) + /* maybe kexecing and resource is busy. try a reset */ + retrc = rc = ibmvfc_reset_crq(vhost); + + if (rc == H_CLOSED) + dev_warn(dev, "Partner adapter not ready\n"); + else if (rc) { + dev_warn(dev, "Error %d opening adapter\n", rc); + goto reg_crq_failed; + } + + retrc = 0; + + if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { + dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); + goto req_irq_failed; + } + + if ((rc = vio_enable_interrupts(vdev))) { + dev_err(dev, "Error %d enabling interrupts\n", rc); + goto req_irq_failed; + } + + crq->cur = 0; + LEAVE; + return retrc; + +req_irq_failed: + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); +reg_crq_failed: + dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); +map_failed: + free_page((unsigned long)crq->msgs); + return retrc; +} + +/** + * ibmvfc_free_mem - Free memory for vhost + * @vhost: ibmvfc host struct + * + * Return value: + * none + **/ +static void ibmvfc_free_mem(struct ibmvfc_host *vhost) +{ + struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; + + ENTER; + mempool_destroy(vhost->tgt_pool); + kfree(vhost->trace); + dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, + vhost->disc_buf_dma); + dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), + vhost->login_buf, vhost->login_buf_dma); + dma_pool_destroy(vhost->sg_pool); + dma_unmap_single(vhost->dev, async_q->msg_token, + async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); + free_page((unsigned long)async_q->msgs); + LEAVE; +} + +/** + * ibmvfc_alloc_mem - Allocate memory for vhost + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / non-zero on failure + **/ +static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) +{ + struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; + struct device *dev = vhost->dev; + + ENTER; + async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); + if (!async_q->msgs) { + dev_err(dev, "Couldn't allocate async queue.\n"); + goto nomem; + } + + async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); + async_q->msg_token = dma_map_single(dev, async_q->msgs, + async_q->size * sizeof(*async_q->msgs), + DMA_BIDIRECTIONAL); + + if (dma_mapping_error(async_q->msg_token)) { + dev_err(dev, "Failed to map async queue\n"); + goto free_async_crq; + } + + vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, + SG_ALL * sizeof(struct srp_direct_buf), + sizeof(struct srp_direct_buf), 0); + + if (!vhost->sg_pool) { + dev_err(dev, "Failed to allocate sg pool\n"); + goto unmap_async_crq; + } + + vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), + &vhost->login_buf_dma, GFP_KERNEL); + + if (!vhost->login_buf) { + dev_err(dev, "Couldn't allocate NPIV login buffer\n"); + goto free_sg_pool; + } + + vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; + vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, + &vhost->disc_buf_dma, GFP_KERNEL); + + if (!vhost->disc_buf) { + dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); + goto free_login_buffer; + } + + vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, + sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); + + if (!vhost->trace) + goto free_disc_buffer; + + vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, + sizeof(struct ibmvfc_target)); + + if (!vhost->tgt_pool) { + dev_err(dev, "Couldn't allocate target memory pool\n"); + goto free_trace; + } + + LEAVE; + return 0; + +free_trace: + kfree(vhost->trace); +free_disc_buffer: + dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, + vhost->disc_buf_dma); +free_login_buffer: + dma_free_coherent(dev, sizeof(*vhost->login_buf), + vhost->login_buf, vhost->login_buf_dma); +free_sg_pool: + dma_pool_destroy(vhost->sg_pool); +unmap_async_crq: + dma_unmap_single(dev, async_q->msg_token, + async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); +free_async_crq: + free_page((unsigned long)async_q->msgs); +nomem: + LEAVE; + return -ENOMEM; +} + +/** + * ibmvfc_probe - Adapter hot plug add entry point + * @vdev: vio device struct + * @id: vio device id struct + * + * Return value: + * 0 on success / non-zero on failure + **/ +static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) +{ + struct ibmvfc_host *vhost; + struct Scsi_Host *shost; + struct device *dev = &vdev->dev; + int rc = -ENOMEM; + + ENTER; + shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); + if (!shost) { + dev_err(dev, "Couldn't allocate host data\n"); + goto out; + } + + shost->transportt = ibmvfc_transport_template; + shost->can_queue = max_requests; + shost->max_lun = max_lun; + shost->max_id = max_targets; + shost->max_sectors = IBMVFC_MAX_SECTORS; + shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; + shost->unique_id = shost->host_no; + + vhost = shost_priv(shost); + INIT_LIST_HEAD(&vhost->sent); + INIT_LIST_HEAD(&vhost->free); + INIT_LIST_HEAD(&vhost->targets); + sprintf(vhost->name, IBMVFC_NAME); + vhost->host = shost; + vhost->dev = dev; + vhost->partition_number = -1; + vhost->log_level = log_level; + strcpy(vhost->partition_name, "UNKNOWN"); + init_waitqueue_head(&vhost->work_wait_q); + init_waitqueue_head(&vhost->init_wait_q); + + if ((rc = ibmvfc_alloc_mem(vhost))) + goto free_scsi_host; + + vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, + shost->host_no); + + if (IS_ERR(vhost->work_thread)) { + dev_err(dev, "Couldn't create kernel thread: %ld\n", + PTR_ERR(vhost->work_thread)); + goto free_host_mem; + } + + if ((rc = ibmvfc_init_crq(vhost))) { + dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); + goto kill_kthread; + } + + if ((rc = ibmvfc_init_event_pool(vhost))) { + dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); + goto release_crq; + } + + if ((rc = scsi_add_host(shost, dev))) + goto release_event_pool; + + if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, + &ibmvfc_trace_attr))) { + dev_err(dev, "Failed to create trace file. rc=%d\n", rc); + goto remove_shost; + } + + dev_set_drvdata(dev, vhost); + spin_lock(&ibmvfc_driver_lock); + list_add_tail(&vhost->queue, &ibmvfc_head); + spin_unlock(&ibmvfc_driver_lock); + + ibmvfc_send_crq_init(vhost); + scsi_scan_host(shost); + return 0; + +remove_shost: + scsi_remove_host(shost); +release_event_pool: + ibmvfc_free_event_pool(vhost); +release_crq: + ibmvfc_release_crq_queue(vhost); +kill_kthread: + kthread_stop(vhost->work_thread); +free_host_mem: + ibmvfc_free_mem(vhost); +free_scsi_host: + scsi_host_put(shost); +out: + LEAVE; + return rc; +} + +/** + * ibmvfc_remove - Adapter hot plug remove entry point + * @vdev: vio device struct + * + * Return value: + * 0 + **/ +static int ibmvfc_remove(struct vio_dev *vdev) +{ + struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); + unsigned long flags; + + ENTER; + ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); + kthread_stop(vhost->work_thread); + fc_remove_host(vhost->host); + scsi_remove_host(vhost->host); + ibmvfc_release_crq_queue(vhost); + + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_purge_requests(vhost, DID_ERROR); + ibmvfc_free_event_pool(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + ibmvfc_free_mem(vhost); + spin_lock(&ibmvfc_driver_lock); + list_del(&vhost->queue); + spin_unlock(&ibmvfc_driver_lock); + scsi_host_put(vhost->host); + LEAVE; + return 0; +} + +static struct vio_device_id ibmvfc_device_table[] __devinitdata = { + {"fcp", "IBM,vfc-client"}, + { "", "" } +}; +MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); + +static struct vio_driver ibmvfc_driver = { + .id_table = ibmvfc_device_table, + .probe = ibmvfc_probe, + .remove = ibmvfc_remove, + .driver = { + .name = IBMVFC_NAME, + .owner = THIS_MODULE, + } +}; + +static struct fc_function_template ibmvfc_transport_functions = { + .show_host_fabric_name = 1, + .show_host_node_name = 1, + .show_host_port_name = 1, + .show_host_supported_classes = 1, + .show_host_port_type = 1, + .show_host_port_id = 1, + + .get_host_port_state = ibmvfc_get_host_port_state, + .show_host_port_state = 1, + + .get_host_speed = ibmvfc_get_host_speed, + .show_host_speed = 1, + + .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, + .terminate_rport_io = ibmvfc_terminate_rport_io, + + .show_rport_maxframe_size = 1, + .show_rport_supported_classes = 1, + + .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, + .show_rport_dev_loss_tmo = 1, + + .get_starget_node_name = ibmvfc_get_starget_node_name, + .show_starget_node_name = 1, + + .get_starget_port_name = ibmvfc_get_starget_port_name, + .show_starget_port_name = 1, + + .get_starget_port_id = ibmvfc_get_starget_port_id, + .show_starget_port_id = 1, +}; + +/** + * ibmvfc_module_init - Initialize the ibmvfc module + * + * Return value: + * 0 on success / other on failure + **/ +static int __init ibmvfc_module_init(void) +{ + int rc; + + if (!firmware_has_feature(FW_FEATURE_VIO)) + return -ENODEV; + + printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", + IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); + + ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); + if (!ibmvfc_transport_template) + return -ENOMEM; + + rc = vio_register_driver(&ibmvfc_driver); + if (rc) + fc_release_transport(ibmvfc_transport_template); + return rc; +} + +/** + * ibmvfc_module_exit - Teardown the ibmvfc module + * + * Return value: + * nothing + **/ +static void __exit ibmvfc_module_exit(void) +{ + vio_unregister_driver(&ibmvfc_driver); + fc_release_transport(ibmvfc_transport_template); +} + +module_init(ibmvfc_module_init); +module_exit(ibmvfc_module_exit); diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h new file mode 100644 index 0000000..057f3c0 --- /dev/null +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -0,0 +1,682 @@ +/* + * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter + * + * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation + * + * Copyright (C) IBM Corporation, 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef _IBMVFC_H +#define _IBMVFC_H + +#include <linux/list.h> +#include <linux/types.h> +#include "viosrp.h" + +#define IBMVFC_NAME "ibmvfc" +#define IBMVFC_DRIVER_VERSION "1.0.0" +#define IBMVFC_DRIVER_DATE "(July 1, 2008)" + +#define IBMVFC_DEFAULT_TIMEOUT 15 +#define IBMVFC_INIT_TIMEOUT 30 +#define IBMVFC_MAX_REQUESTS_DEFAULT 100 + +#define IBMVFC_DEBUG 0 +#define IBMVFC_MAX_TARGETS 1024 +#define IBMVFC_MAX_LUN 0xffffffff +#define IBMVFC_MAX_SECTORS 0xffffu +#define IBMVFC_MAX_DISC_THREADS 4 +#define IBMVFC_TGT_MEMPOOL_SZ 64 +#define IBMVFC_MAX_CMDS_PER_LUN 64 +#define IBMVFC_MAX_INIT_RETRIES 3 +#define IBMVFC_DEV_LOSS_TMO (5 * 60) +#define IBMVFC_DEFAULT_LOG_LEVEL 2 +#define IBMVFC_MAX_CDB_LEN 16 + +/* + * Ensure we have resources for ERP and initialization: + * 1 for ERP + * 1 for initialization + * 1 for each discovery thread + */ +#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + disc_threads) + +#define IBMVFC_MAD_SUCCESS 0x00 +#define IBMVFC_MAD_NOT_SUPPORTED 0xF1 +#define IBMVFC_MAD_FAILED 0xF7 +#define IBMVFC_MAD_DRIVER_FAILED 0xEE +#define IBMVFC_MAD_CRQ_ERROR 0xEF + +enum ibmvfc_crq_valid { + IBMVFC_CRQ_CMD_RSP = 0x80, + IBMVFC_CRQ_INIT_RSP = 0xC0, + IBMVFC_CRQ_XPORT_EVENT = 0xFF, +}; + +enum ibmvfc_crq_format { + IBMVFC_CRQ_INIT = 0x01, + IBMVFC_CRQ_INIT_COMPLETE = 0x02, + IBMVFC_PARTITION_MIGRATED = 0x06, +}; + +enum ibmvfc_cmd_status_flags { + IBMVFC_FABRIC_MAPPED = 0x0001, + IBMVFC_VIOS_FAILURE = 0x0002, + IBMVFC_FC_FAILURE = 0x0004, + IBMVFC_FC_SCSI_ERROR = 0x0008, + IBMVFC_HW_EVENT_LOGGED = 0x0010, + IBMVFC_VIOS_LOGGED = 0x0020, +}; + +enum ibmvfc_fabric_mapped_errors { + IBMVFC_UNABLE_TO_ESTABLISH = 0x0001, + IBMVFC_XPORT_FAULT = 0x0002, + IBMVFC_CMD_TIMEOUT = 0x0003, + IBMVFC_ENETDOWN = 0x0004, + IBMVFC_HW_FAILURE = 0x0005, + IBMVFC_LINK_DOWN_ERR = 0x0006, + IBMVFC_LINK_DEAD_ERR = 0x0007, + IBMVFC_UNABLE_TO_REGISTER = 0x0008, + IBMVFC_XPORT_BUSY = 0x000A, + IBMVFC_XPORT_DEAD = 0x000B, + IBMVFC_CONFIG_ERROR = 0x000C, + IBMVFC_NAME_SERVER_FAIL = 0x000D, + IBMVFC_LINK_HALTED = 0x000E, + IBMVFC_XPORT_GENERAL = 0x8000, +}; + +enum ibmvfc_vios_errors { + IBMVFC_CRQ_FAILURE = 0x0001, + IBMVFC_SW_FAILURE = 0x0002, + IBMVFC_INVALID_PARAMETER = 0x0003, + IBMVFC_MISSING_PARAMETER = 0x0004, + IBMVFC_HOST_IO_BUS = 0x0005, + IBMVFC_TRANS_CANCELLED = 0x0006, + IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007, + IBMVFC_INSUFFICIENT_RESOURCE = 0x0008, + IBMVFC_COMMAND_FAILED = 0x8000, +}; + +enum ibmvfc_mad_types { + IBMVFC_NPIV_LOGIN = 0x0001, + IBMVFC_DISC_TARGETS = 0x0002, + IBMVFC_PORT_LOGIN = 0x0004, + IBMVFC_PROCESS_LOGIN = 0x0008, + IBMVFC_QUERY_TARGET = 0x0010, + IBMVFC_IMPLICIT_LOGOUT = 0x0040, + IBMVFC_TMF_MAD = 0x0100, +}; + +struct ibmvfc_mad_common { + u32 version; + u32 reserved; + u32 opcode; + u16 status; + u16 length; + u64 tag; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_npiv_login_mad { + struct ibmvfc_mad_common common; + struct srp_direct_buf buffer; +}__attribute__((packed, aligned (8))); + +#define IBMVFC_MAX_NAME 256 + +struct ibmvfc_npiv_login { + u32 ostype; +#define IBMVFC_OS_LINUX 0x02 + u32 pad; + u64 max_dma_len; + u32 max_payload; + u32 max_response; + u32 partition_num; + u32 vfc_frame_version; + u16 fcp_version; + u16 flags; +#define IBMVFC_CLIENT_MIGRATED 0x01 +#define IBMVFC_FLUSH_ON_HALT 0x02 + u32 max_cmds; + u64 capabilities; +#define IBMVFC_CAN_MIGRATE 0x01 + u64 node_name; + struct srp_direct_buf async; + u8 partition_name[IBMVFC_MAX_NAME]; + u8 device_name[IBMVFC_MAX_NAME]; + u8 drc_name[IBMVFC_MAX_NAME]; + u64 reserved2[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_common_svc_parms { + u16 fcph_version; + u16 b2b_credit; + u16 features; + u16 bb_rcv_sz; /* upper nibble is BB_SC_N */ + u32 ratov; + u32 edtov; +}__attribute__((packed, aligned (4))); + +struct ibmvfc_service_parms { + struct ibmvfc_common_svc_parms common; + u8 port_name[8]; + u8 node_name[8]; + u32 class1_parms[4]; + u32 class2_parms[4]; + u32 class3_parms[4]; + u32 obsolete[4]; + u32 vendor_version[4]; + u32 services_avail[2]; + u32 ext_len; + u32 reserved[30]; + u32 clk_sync_qos[2]; +}__attribute__((packed, aligned (4))); + +struct ibmvfc_npiv_login_resp { + u32 version; + u16 status; + u16 error; + u32 flags; +#define IBMVFC_NATIVE_FC 0x01 +#define IBMVFC_CAN_FLUSH_ON_HALT 0x08 + u32 reserved; + u64 capabilites; + u32 max_cmds; + u32 scsi_id_sz; + u64 max_dma_len; + u64 scsi_id; + u64 port_name; + u64 node_name; + u64 link_speed; + u8 partition_name[IBMVFC_MAX_NAME]; + u8 device_name[IBMVFC_MAX_NAME]; + u8 port_loc_code[IBMVFC_MAX_NAME]; + u8 drc_name[IBMVFC_MAX_NAME]; + struct ibmvfc_service_parms service_parms; + u64 reserved2; +}__attribute__((packed, aligned (8))); + +union ibmvfc_npiv_login_data { + struct ibmvfc_npiv_login login; + struct ibmvfc_npiv_login_resp resp; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_discover_targets_buf { + u32 scsi_id[1]; +#define IBMVFC_DISC_TGT_SCSI_ID_MASK 0x00ffffff +}; + +struct ibmvfc_discover_targets { + struct ibmvfc_mad_common common; + struct srp_direct_buf buffer; + u32 flags; + u16 status; + u16 error; + u32 bufflen; + u32 num_avail; + u32 num_written; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_fc_reason { + IBMVFC_INVALID_ELS_CMD_CODE = 0x01, + IBMVFC_INVALID_VERSION = 0x02, + IBMVFC_LOGICAL_ERROR = 0x03, + IBMVFC_INVALID_CT_IU_SIZE = 0x04, + IBMVFC_LOGICAL_BUSY = 0x05, + IBMVFC_PROTOCOL_ERROR = 0x07, + IBMVFC_UNABLE_TO_PERFORM_REQ = 0x09, + IBMVFC_CMD_NOT_SUPPORTED = 0x0B, + IBMVFC_SERVER_NOT_AVAIL = 0x0D, + IBMVFC_CMD_IN_PROGRESS = 0x0E, + IBMVFC_VENDOR_SPECIFIC = 0xFF, +}; + +enum ibmvfc_fc_type { + IBMVFC_FABRIC_REJECT = 0x01, + IBMVFC_PORT_REJECT = 0x02, + IBMVFC_LS_REJECT = 0x03, + IBMVFC_FABRIC_BUSY = 0x04, + IBMVFC_PORT_BUSY = 0x05, + IBMVFC_BASIC_REJECT = 0x06, +}; + +enum ibmvfc_gs_explain { + IBMVFC_PORT_NAME_NOT_REG = 0x02, +}; + +struct ibmvfc_port_login { + struct ibmvfc_mad_common common; + u64 scsi_id; + u16 reserved; + u16 fc_service_class; + u32 blksz; + u32 hdr_per_blk; + u16 status; + u16 error; /* also fc_reason */ + u16 fc_explain; + u16 fc_type; + u32 reserved2; + struct ibmvfc_service_parms service_parms; + struct ibmvfc_service_parms service_parms_change; + u64 reserved3[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_prli_svc_parms { + u8 type; +#define IBMVFC_SCSI_FCP_TYPE 0x08 + u8 type_ext; + u16 flags; +#define IBMVFC_PRLI_ORIG_PA_VALID 0x8000 +#define IBMVFC_PRLI_RESP_PA_VALID 0x4000 +#define IBMVFC_PRLI_EST_IMG_PAIR 0x2000 + u32 orig_pa; + u32 resp_pa; + u32 service_parms; +#define IBMVFC_PRLI_TASK_RETRY 0x00000200 +#define IBMVFC_PRLI_RETRY 0x00000100 +#define IBMVFC_PRLI_DATA_OVERLAY 0x00000040 +#define IBMVFC_PRLI_INITIATOR_FUNC 0x00000020 +#define IBMVFC_PRLI_TARGET_FUNC 0x00000010 +#define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED 0x00000002 +#define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED 0x00000001 +}__attribute__((packed, aligned (4))); + +struct ibmvfc_process_login { + struct ibmvfc_mad_common common; + u64 scsi_id; + struct ibmvfc_prli_svc_parms parms; + u8 reserved[48]; + u16 status; + u16 error; /* also fc_reason */ + u32 reserved2; + u64 reserved3[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_query_tgt { + struct ibmvfc_mad_common common; + u64 wwpn; + u64 scsi_id; + u16 status; + u16 error; + u16 fc_explain; + u16 fc_type; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_implicit_logout { + struct ibmvfc_mad_common common; + u64 old_scsi_id; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_tmf { + struct ibmvfc_mad_common common; + u64 scsi_id; + struct scsi_lun lun; + u32 flags; +#define IBMVFC_TMF_ABORT_TASK 0x02 +#define IBMVFC_TMF_ABORT_TASK_SET 0x04 +#define IBMVFC_TMF_LUN_RESET 0x10 +#define IBMVFC_TMF_TGT_RESET 0x20 +#define IBMVFC_TMF_LUA_VALID 0x40 + u32 cancel_key; + u32 my_cancel_key; +#define IBMVFC_TMF_CANCEL_KEY 0x80000000 + u32 pad; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_fcp_rsp_info_codes { + RSP_NO_FAILURE = 0x00, + RSP_TMF_REJECTED = 0x04, + RSP_TMF_FAILED = 0x05, + RSP_TMF_INVALID_LUN = 0x09, +}; + +struct ibmvfc_fcp_rsp_info { + u16 reserved; + u8 rsp_code; + u8 reserved2[4]; +}__attribute__((packed, aligned (2))); + +enum ibmvfc_fcp_rsp_flags { + FCP_BIDI_RSP = 0x80, + FCP_BIDI_READ_RESID_UNDER = 0x40, + FCP_BIDI_READ_RESID_OVER = 0x20, + FCP_CONF_REQ = 0x10, + FCP_RESID_UNDER = 0x08, + FCP_RESID_OVER = 0x04, + FCP_SNS_LEN_VALID = 0x02, + FCP_RSP_LEN_VALID = 0x01, +}; + +union ibmvfc_fcp_rsp_data { + struct ibmvfc_fcp_rsp_info info; + u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_fcp_rsp { + u64 reserved; + u16 retry_delay_timer; + u8 flags; + u8 scsi_status; + u32 fcp_resid; + u32 fcp_sense_len; + u32 fcp_rsp_len; + union ibmvfc_fcp_rsp_data data; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_cmd_flags { + IBMVFC_SCATTERLIST = 0x0001, + IBMVFC_NO_MEM_DESC = 0x0002, + IBMVFC_READ = 0x0004, + IBMVFC_WRITE = 0x0008, + IBMVFC_TMF = 0x0080, + IBMVFC_CLASS_3_ERR = 0x0100, +}; + +enum ibmvfc_fc_task_attr { + IBMVFC_SIMPLE_TASK = 0x00, + IBMVFC_HEAD_OF_QUEUE = 0x01, + IBMVFC_ORDERED_TASK = 0x02, + IBMVFC_ACA_TASK = 0x04, +}; + +enum ibmvfc_fc_tmf_flags { + IBMVFC_ABORT_TASK_SET = 0x02, + IBMVFC_LUN_RESET = 0x10, + IBMVFC_TARGET_RESET = 0x20, +}; + +struct ibmvfc_fcp_cmd_iu { + struct scsi_lun lun; + u8 crn; + u8 pri_task_attr; + u8 tmf_flags; + u8 add_cdb_len; +#define IBMVFC_RDDATA 0x02 +#define IBMVFC_WRDATA 0x01 + u8 cdb[IBMVFC_MAX_CDB_LEN]; + u32 xfer_len; +}__attribute__((packed, aligned (4))); + +struct ibmvfc_cmd { + u64 task_tag; + u32 frame_type; + u32 payload_len; + u32 resp_len; + u32 adapter_resid; + u16 status; + u16 error; + u16 flags; + u16 response_flags; +#define IBMVFC_ADAPTER_RESID_VALID 0x01 + u32 cancel_key; + u32 exchange_id; + struct srp_direct_buf ext_func; + struct srp_direct_buf ioba; + struct srp_direct_buf resp; + u64 correlation; + u64 tgt_scsi_id; + u64 tag; + u64 reserved3[2]; + struct ibmvfc_fcp_cmd_iu iu; + struct ibmvfc_fcp_rsp rsp; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_trace_start_entry { + u32 xfer_len; +}__attribute__((packed)); + +struct ibmvfc_trace_end_entry { + u16 status; + u16 error; + u8 fcp_rsp_flags; + u8 rsp_code; + u8 scsi_status; + u8 reserved; +}__attribute__((packed)); + +struct ibmvfc_trace_entry { + struct ibmvfc_event *evt; + u32 time; + u32 scsi_id; + u32 lun; + u8 fmt; + u8 op_code; + u8 tmf_flags; + u8 type; +#define IBMVFC_TRC_START 0x00 +#define IBMVFC_TRC_END 0xff + union { + struct ibmvfc_trace_start_entry start; + struct ibmvfc_trace_end_entry end; + } u; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_crq_formats { + IBMVFC_CMD_FORMAT = 0x01, + IBMVFC_ASYNC_EVENT = 0x02, + IBMVFC_MAD_FORMAT = 0x04, +}; + +enum ibmvfc_async_event { + IBMVFC_AE_ELS_PLOGI = 0x0001, + IBMVFC_AE_ELS_LOGO = 0x0002, + IBMVFC_AE_ELS_PRLO = 0x0004, + IBMVFC_AE_SCN_NPORT = 0x0008, + IBMVFC_AE_SCN_GROUP = 0x0010, + IBMVFC_AE_SCN_DOMAIN = 0x0020, + IBMVFC_AE_SCN_FABRIC = 0x0040, + IBMVFC_AE_LINK_UP = 0x0080, + IBMVFC_AE_LINK_DOWN = 0x0100, + IBMVFC_AE_LINK_DEAD = 0x0200, + IBMVFC_AE_HALT = 0x0400, + IBMVFC_AE_RESUME = 0x0800, + IBMVFC_AE_ADAPTER_FAILED = 0x1000, +}; + +struct ibmvfc_crq { + u8 valid; + u8 format; + u8 reserved[6]; + u64 ioba; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_crq_queue { + struct ibmvfc_crq *msgs; + int size, cur; + dma_addr_t msg_token; +}; + +struct ibmvfc_async_crq { + u8 valid; + u8 pad[3]; + u32 pad2; + u64 event; + u64 scsi_id; + u64 wwpn; + u64 node_name; + u64 reserved; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_async_crq_queue { + struct ibmvfc_async_crq *msgs; + int size, cur; + dma_addr_t msg_token; +}; + +union ibmvfc_iu { + struct ibmvfc_mad_common mad_common; + struct ibmvfc_npiv_login_mad npiv_login; + struct ibmvfc_discover_targets discover_targets; + struct ibmvfc_port_login plogi; + struct ibmvfc_process_login prli; + struct ibmvfc_query_tgt query_tgt; + struct ibmvfc_implicit_logout implicit_logout; + struct ibmvfc_tmf tmf; + struct ibmvfc_cmd cmd; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_target_action { + IBMVFC_TGT_ACTION_NONE = 0, + IBMVFC_TGT_ACTION_INIT, + IBMVFC_TGT_ACTION_INIT_WAIT, + IBMVFC_TGT_ACTION_ADD_RPORT, + IBMVFC_TGT_ACTION_DEL_RPORT, +}; + +struct ibmvfc_target { + struct list_head queue; + struct ibmvfc_host *vhost; + u64 scsi_id; + u64 new_scsi_id; + struct fc_rport *rport; + int target_id; + enum ibmvfc_target_action action; + int need_login; + int init_retries; + struct ibmvfc_service_parms service_parms; + struct ibmvfc_service_parms service_parms_change; + struct fc_rport_identifiers ids; + void (*job_step) (struct ibmvfc_target *); + struct kref kref; +}; + +/* a unit of work for the hosting partition */ +struct ibmvfc_event { + struct list_head queue; + struct ibmvfc_host *vhost; + struct ibmvfc_target *tgt; + struct scsi_cmnd *cmnd; + atomic_t free; + union ibmvfc_iu *xfer_iu; + void (*done) (struct ibmvfc_event *); + struct ibmvfc_crq crq; + union ibmvfc_iu iu; + union ibmvfc_iu *sync_iu; + struct srp_direct_buf *ext_list; + dma_addr_t ext_list_token; + struct completion comp; + struct timer_list timer; +}; + +/* a pool of event structs for use */ +struct ibmvfc_event_pool { + struct ibmvfc_event *events; + u32 size; + union ibmvfc_iu *iu_storage; + dma_addr_t iu_token; +}; + +enum ibmvfc_host_action { + IBMVFC_HOST_ACTION_NONE = 0, + IBMVFC_HOST_ACTION_INIT, + IBMVFC_HOST_ACTION_INIT_WAIT, + IBMVFC_HOST_ACTION_QUERY, + IBMVFC_HOST_ACTION_QUERY_TGTS, + IBMVFC_HOST_ACTION_TGT_DEL, + IBMVFC_HOST_ACTION_ALLOC_TGTS, + IBMVFC_HOST_ACTION_TGT_INIT, + IBMVFC_HOST_ACTION_TGT_ADD, +}; + +enum ibmvfc_host_state { + IBMVFC_NO_CRQ = 0, + IBMVFC_INITIALIZING, + IBMVFC_ACTIVE, + IBMVFC_HALTED, + IBMVFC_LINK_DOWN, + IBMVFC_LINK_DEAD, + IBMVFC_HOST_OFFLINE, +}; + +struct ibmvfc_host { + char name[8]; + struct list_head queue; + struct Scsi_Host *host; + enum ibmvfc_host_state state; + enum ibmvfc_host_action action; +#define IBMVFC_NUM_TRACE_INDEX_BITS 8 +#define IBMVFC_NUM_TRACE_ENTRIES (1 << IBMVFC_NUM_TRACE_INDEX_BITS) +#define IBMVFC_TRACE_SIZE (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES) + struct ibmvfc_trace_entry *trace; + u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS; + int num_targets; + struct list_head targets; + struct list_head sent; + struct list_head free; + struct device *dev; + struct ibmvfc_event_pool pool; + struct dma_pool *sg_pool; + mempool_t *tgt_pool; + struct ibmvfc_crq_queue crq; + struct ibmvfc_async_crq_queue async_crq; + struct ibmvfc_npiv_login login_info; + union ibmvfc_npiv_login_data *login_buf; + dma_addr_t login_buf_dma; + int disc_buf_sz; + int log_level; + struct ibmvfc_discover_targets_buf *disc_buf; + int task_set; + int init_retries; + int discovery_threads; + int client_migrated; + int reinit; + int events_to_log; +#define IBMVFC_AE_LINKUP 0x0001 +#define IBMVFC_AE_LINKDOWN 0x0002 +#define IBMVFC_AE_RSCN 0x0004 + dma_addr_t disc_buf_dma; + unsigned int partition_number; + char partition_name[97]; + void (*job_step) (struct ibmvfc_host *); + struct task_struct *work_thread; + wait_queue_head_t init_wait_q; + wait_queue_head_t work_wait_q; +}; + +#define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0) + +#define tgt_dbg(t, fmt, ...) \ + DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)) + +#define tgt_err(t, fmt, ...) \ + dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__) + +#define ibmvfc_dbg(vhost, ...) \ + DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__)) + +#define ibmvfc_log(vhost, level, ...) \ + do { \ + if (level >= (vhost)->log_level) \ + dev_err((vhost)->dev, ##__VA_ARGS__); \ + } while (0) + +#define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __FUNCTION__)) +#define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __FUNCTION__)) + +#ifdef CONFIG_SCSI_IBMVFC_TRACE +#define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr) +#define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr) +#else +#define ibmvfc_create_trace_file(kobj, attr) 0 +#define ibmvfc_remove_trace_file(kobj, attr) do { } while (0) +#endif + +#endif diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 72b9b2a..2a2f009 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -64,6 +64,10 @@ MODULE_LICENSE("GPL"); #define BUG_ON(expr) #endif +static struct scsi_transport_template *iscsi_tcp_scsi_transport; +static struct scsi_host_template iscsi_sht; +static struct iscsi_transport iscsi_tcp_transport; + static unsigned int iscsi_max_lun = 512; module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); @@ -494,39 +498,43 @@ iscsi_tcp_data_recv_prep(struct iscsi_tcp_conn *tcp_conn) * must be called with session lock */ static void -iscsi_tcp_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_tcp_cleanup_task(struct iscsi_conn *conn, struct iscsi_task *task) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct iscsi_r2t_info *r2t; - /* flush ctask's r2t queues */ - while (__kfifo_get(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*))) { - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + /* nothing to do for mgmt tasks */ + if (!task->sc) + return; + + /* flush task's r2t queues */ + while (__kfifo_get(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*))) { + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); - debug_scsi("iscsi_tcp_cleanup_ctask pending r2t dropped\n"); + debug_scsi("iscsi_tcp_cleanup_task pending r2t dropped\n"); } - r2t = tcp_ctask->r2t; + r2t = tcp_task->r2t; if (r2t != NULL) { - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); - tcp_ctask->r2t = NULL; + tcp_task->r2t = NULL; } } /** * iscsi_data_rsp - SCSI Data-In Response processing * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task **/ static int -iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_task *task) { struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)tcp_conn->in.hdr; struct iscsi_session *session = conn->session; - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; int datasn = be32_to_cpu(rhdr->datasn); unsigned total_in_length = scsi_in(sc)->length; @@ -534,18 +542,18 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) if (tcp_conn->in.datalen == 0) return 0; - if (tcp_ctask->exp_datasn != datasn) { - debug_tcp("%s: ctask->exp_datasn(%d) != rhdr->datasn(%d)\n", - __FUNCTION__, tcp_ctask->exp_datasn, datasn); + if (tcp_task->exp_datasn != datasn) { + debug_tcp("%s: task->exp_datasn(%d) != rhdr->datasn(%d)\n", + __func__, tcp_task->exp_datasn, datasn); return ISCSI_ERR_DATASN; } - tcp_ctask->exp_datasn++; + tcp_task->exp_datasn++; - tcp_ctask->data_offset = be32_to_cpu(rhdr->offset); - if (tcp_ctask->data_offset + tcp_conn->in.datalen > total_in_length) { + tcp_task->data_offset = be32_to_cpu(rhdr->offset); + if (tcp_task->data_offset + tcp_conn->in.datalen > total_in_length) { debug_tcp("%s: data_offset(%d) + data_len(%d) > total_length_in(%d)\n", - __FUNCTION__, tcp_ctask->data_offset, + __func__, tcp_task->data_offset, tcp_conn->in.datalen, total_in_length); return ISCSI_ERR_DATA_OFFSET; } @@ -574,7 +582,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) /** * iscsi_solicit_data_init - initialize first Data-Out * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task * @r2t: R2T info * * Notes: @@ -584,7 +592,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) * This function is called with connection lock taken. **/ static void -iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, +iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_task *task, struct iscsi_r2t_info *r2t) { struct iscsi_data *hdr; @@ -595,8 +603,8 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, hdr->datasn = cpu_to_be32(r2t->solicit_datasn); r2t->solicit_datasn++; hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); - hdr->itt = ctask->hdr->itt; + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); + hdr->itt = task->hdr->itt; hdr->exp_statsn = r2t->exp_statsn; hdr->offset = cpu_to_be32(r2t->data_offset); if (r2t->data_length > conn->max_xmit_dlength) { @@ -616,14 +624,14 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, /** * iscsi_r2t_rsp - iSCSI R2T Response processing * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task **/ static int -iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task) { struct iscsi_r2t_info *r2t; struct iscsi_session *session = conn->session; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct iscsi_r2t_rsp *rhdr = (struct iscsi_r2t_rsp *)tcp_conn->in.hdr; int r2tsn = be32_to_cpu(rhdr->r2tsn); @@ -636,23 +644,23 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) return ISCSI_ERR_DATALEN; } - if (tcp_ctask->exp_datasn != r2tsn){ - debug_tcp("%s: ctask->exp_datasn(%d) != rhdr->r2tsn(%d)\n", - __FUNCTION__, tcp_ctask->exp_datasn, r2tsn); + if (tcp_task->exp_datasn != r2tsn){ + debug_tcp("%s: task->exp_datasn(%d) != rhdr->r2tsn(%d)\n", + __func__, tcp_task->exp_datasn, r2tsn); return ISCSI_ERR_R2TSN; } /* fill-in new R2T associated with the task */ iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); - if (!ctask->sc || session->state != ISCSI_STATE_LOGGED_IN) { + if (!task->sc || session->state != ISCSI_STATE_LOGGED_IN) { iscsi_conn_printk(KERN_INFO, conn, "dropping R2T itt %d in recovery.\n", - ctask->itt); + task->itt); return 0; } - rc = __kfifo_get(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*)); + rc = __kfifo_get(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); BUG_ON(!rc); r2t->exp_statsn = rhdr->statsn; @@ -660,7 +668,7 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) if (r2t->data_length == 0) { iscsi_conn_printk(KERN_ERR, conn, "invalid R2T with zero data len\n"); - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); return ISCSI_ERR_DATALEN; } @@ -671,12 +679,12 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) r2t->data_length, session->max_burst); r2t->data_offset = be32_to_cpu(rhdr->data_offset); - if (r2t->data_offset + r2t->data_length > scsi_out(ctask->sc)->length) { + if (r2t->data_offset + r2t->data_length > scsi_out(task->sc)->length) { iscsi_conn_printk(KERN_ERR, conn, "invalid R2T with data len %u at offset %u " "and total length %d\n", r2t->data_length, - r2t->data_offset, scsi_out(ctask->sc)->length); - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + r2t->data_offset, scsi_out(task->sc)->length); + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); return ISCSI_ERR_DATALEN; } @@ -684,13 +692,13 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) r2t->ttt = rhdr->ttt; /* no flip */ r2t->solicit_datasn = 0; - iscsi_solicit_data_init(conn, ctask, r2t); + iscsi_solicit_data_init(conn, task, r2t); - tcp_ctask->exp_datasn = r2tsn + 1; - __kfifo_put(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*)); + tcp_task->exp_datasn = r2tsn + 1; + __kfifo_put(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*)); conn->r2t_pdus_cnt++; - iscsi_requeue_ctask(ctask); + iscsi_requeue_task(task); return 0; } @@ -733,10 +741,8 @@ static int iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) { int rc = 0, opcode, ahslen; - struct iscsi_session *session = conn->session; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct iscsi_cmd_task *ctask; - uint32_t itt; + struct iscsi_task *task; /* verify PDU length */ tcp_conn->in.datalen = ntoh24(hdr->dlength); @@ -754,7 +760,7 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) opcode = hdr->opcode & ISCSI_OPCODE_MASK; /* verify itt (itt encoding: age+cid+itt) */ - rc = iscsi_verify_itt(conn, hdr, &itt); + rc = iscsi_verify_itt(conn, hdr->itt); if (rc) return rc; @@ -763,16 +769,21 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) switch(opcode) { case ISCSI_OP_SCSI_DATA_IN: - ctask = session->cmds[itt]; spin_lock(&conn->session->lock); - rc = iscsi_data_rsp(conn, ctask); - spin_unlock(&conn->session->lock); - if (rc) - return rc; + task = iscsi_itt_to_ctask(conn, hdr->itt); + if (!task) + rc = ISCSI_ERR_BAD_ITT; + else + rc = iscsi_data_rsp(conn, task); + if (rc) { + spin_unlock(&conn->session->lock); + break; + } + if (tcp_conn->in.datalen) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct hash_desc *rx_hash = NULL; - struct scsi_data_buffer *sdb = scsi_in(ctask->sc); + struct scsi_data_buffer *sdb = scsi_in(task->sc); /* * Setup copy of Data-In into the Scsi_Cmnd @@ -787,17 +798,21 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) debug_tcp("iscsi_tcp_begin_data_in(%p, offset=%d, " "datalen=%d)\n", tcp_conn, - tcp_ctask->data_offset, + tcp_task->data_offset, tcp_conn->in.datalen); - return iscsi_segment_seek_sg(&tcp_conn->in.segment, - sdb->table.sgl, - sdb->table.nents, - tcp_ctask->data_offset, - tcp_conn->in.datalen, - iscsi_tcp_process_data_in, - rx_hash); + rc = iscsi_segment_seek_sg(&tcp_conn->in.segment, + sdb->table.sgl, + sdb->table.nents, + tcp_task->data_offset, + tcp_conn->in.datalen, + iscsi_tcp_process_data_in, + rx_hash); + spin_unlock(&conn->session->lock); + return rc; } - /* fall through */ + rc = __iscsi_complete_pdu(conn, hdr, NULL, 0); + spin_unlock(&conn->session->lock); + break; case ISCSI_OP_SCSI_CMD_RSP: if (tcp_conn->in.datalen) { iscsi_tcp_data_recv_prep(tcp_conn); @@ -806,15 +821,17 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) rc = iscsi_complete_pdu(conn, hdr, NULL, 0); break; case ISCSI_OP_R2T: - ctask = session->cmds[itt]; - if (ahslen) + spin_lock(&conn->session->lock); + task = iscsi_itt_to_ctask(conn, hdr->itt); + if (!task) + rc = ISCSI_ERR_BAD_ITT; + else if (ahslen) rc = ISCSI_ERR_AHSLEN; - else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) { - spin_lock(&session->lock); - rc = iscsi_r2t_rsp(conn, ctask); - spin_unlock(&session->lock); - } else + else if (task->sc->sc_data_direction == DMA_TO_DEVICE) + rc = iscsi_r2t_rsp(conn, task); + else rc = ISCSI_ERR_PROTO; + spin_unlock(&conn->session->lock); break; case ISCSI_OP_LOGIN_RSP: case ISCSI_OP_TEXT_RSP: @@ -1176,7 +1193,7 @@ iscsi_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, size_t hdrlen) { struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - debug_tcp("%s(%p%s)\n", __FUNCTION__, tcp_conn, + debug_tcp("%s(%p%s)\n", __func__, tcp_conn, conn->hdrdgst_en? ", digest enabled" : ""); /* Clear the data segment - needs to be filled in by the @@ -1185,7 +1202,7 @@ iscsi_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, size_t hdrlen) /* If header digest is enabled, compute the CRC and * place the digest into the same buffer. We make - * sure that both iscsi_tcp_ctask and mtask have + * sure that both iscsi_tcp_task and mtask have * sufficient room. */ if (conn->hdrdgst_en) { @@ -1217,7 +1234,7 @@ iscsi_tcp_send_data_prep(struct iscsi_conn *conn, struct scatterlist *sg, struct hash_desc *tx_hash = NULL; unsigned int hdr_spec_len; - debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __FUNCTION__, + debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __func__, tcp_conn, offset, len, conn->datadgst_en? ", digest enabled" : ""); @@ -1242,7 +1259,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data, struct hash_desc *tx_hash = NULL; unsigned int hdr_spec_len; - debug_tcp("%s(%p, datalen=%d%s)\n", __FUNCTION__, tcp_conn, len, + debug_tcp("%s(%p, datalen=%d%s)\n", __func__, tcp_conn, len, conn->datadgst_en? ", digest enabled" : ""); /* Make sure the datalen matches what the caller @@ -1260,7 +1277,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data, /** * iscsi_solicit_data_cont - initialize next Data-Out * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task * @r2t: R2T info * @left: bytes left to transfer * @@ -1271,7 +1288,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data, * Called under connection lock. **/ static int -iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, +iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_task *task, struct iscsi_r2t_info *r2t) { struct iscsi_data *hdr; @@ -1288,8 +1305,8 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, hdr->datasn = cpu_to_be32(r2t->solicit_datasn); r2t->solicit_datasn++; hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); - hdr->itt = ctask->hdr->itt; + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); + hdr->itt = task->hdr->itt; hdr->exp_statsn = r2t->exp_statsn; new_offset = r2t->data_offset + r2t->sent; hdr->offset = cpu_to_be32(new_offset); @@ -1307,89 +1324,76 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, } /** - * iscsi_tcp_ctask - Initialize iSCSI SCSI_READ or SCSI_WRITE commands + * iscsi_tcp_task - Initialize iSCSI SCSI_READ or SCSI_WRITE commands * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task * @sc: scsi command **/ static int -iscsi_tcp_ctask_init(struct iscsi_cmd_task *ctask) +iscsi_tcp_task_init(struct iscsi_task *task) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; - struct iscsi_conn *conn = ctask->conn; - struct scsi_cmnd *sc = ctask->sc; + struct iscsi_tcp_task *tcp_task = task->dd_data; + struct iscsi_conn *conn = task->conn; + struct scsi_cmnd *sc = task->sc; int err; - BUG_ON(__kfifo_len(tcp_ctask->r2tqueue)); - tcp_ctask->sent = 0; - tcp_ctask->exp_datasn = 0; + if (!sc) { + /* + * mgmt tasks do not have a scatterlist since they come + * in from the iscsi interface. + */ + debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, + task->itt); + + /* Prepare PDU, optionally w/ immediate data */ + iscsi_tcp_send_hdr_prep(conn, task->hdr, sizeof(*task->hdr)); + + /* If we have immediate data, attach a payload */ + if (task->data_count) + iscsi_tcp_send_linear_data_prepare(conn, task->data, + task->data_count); + return 0; + } + + BUG_ON(__kfifo_len(tcp_task->r2tqueue)); + tcp_task->sent = 0; + tcp_task->exp_datasn = 0; /* Prepare PDU, optionally w/ immediate data */ - debug_scsi("ctask deq [cid %d itt 0x%x imm %d unsol %d]\n", - conn->id, ctask->itt, ctask->imm_count, - ctask->unsol_count); - iscsi_tcp_send_hdr_prep(conn, ctask->hdr, ctask->hdr_len); + debug_scsi("task deq [cid %d itt 0x%x imm %d unsol %d]\n", + conn->id, task->itt, task->imm_count, + task->unsol_count); + iscsi_tcp_send_hdr_prep(conn, task->hdr, task->hdr_len); - if (!ctask->imm_count) + if (!task->imm_count) return 0; /* If we have immediate data, attach a payload */ err = iscsi_tcp_send_data_prep(conn, scsi_out(sc)->table.sgl, scsi_out(sc)->table.nents, - 0, ctask->imm_count); + 0, task->imm_count); if (err) return err; - tcp_ctask->sent += ctask->imm_count; - ctask->imm_count = 0; - return 0; -} - -/** - * iscsi_tcp_mtask_xmit - xmit management(immediate) task - * @conn: iscsi connection - * @mtask: task management task - * - * Notes: - * The function can return -EAGAIN in which case caller must - * call it again later, or recover. '0' return code means successful - * xmit. - **/ -static int -iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask) -{ - int rc; - - /* Flush any pending data first. */ - rc = iscsi_tcp_flush(conn); - if (rc < 0) - return rc; - - if (mtask->hdr->itt == RESERVED_ITT) { - struct iscsi_session *session = conn->session; - - spin_lock_bh(&session->lock); - iscsi_free_mgmt_task(conn, mtask); - spin_unlock_bh(&session->lock); - } - + tcp_task->sent += task->imm_count; + task->imm_count = 0; return 0; } /* - * iscsi_tcp_ctask_xmit - xmit normal PDU task - * @conn: iscsi connection - * @ctask: iscsi command task + * iscsi_tcp_task_xmit - xmit normal PDU task + * @task: iscsi command task * * We're expected to return 0 when everything was transmitted succesfully, * -EAGAIN if there's still data in the queue, or != 0 for any other kind * of error. */ static int -iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_tcp_task_xmit(struct iscsi_task *task) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; - struct scsi_cmnd *sc = ctask->sc; - struct scsi_data_buffer *sdb = scsi_out(sc); + struct iscsi_conn *conn = task->conn; + struct iscsi_tcp_task *tcp_task = task->dd_data; + struct scsi_cmnd *sc = task->sc; + struct scsi_data_buffer *sdb; int rc = 0; flush: @@ -1398,31 +1402,39 @@ flush: if (rc < 0) return rc; + /* mgmt command */ + if (!sc) { + if (task->hdr->itt == RESERVED_ITT) + iscsi_put_task(task); + return 0; + } + /* Are we done already? */ if (sc->sc_data_direction != DMA_TO_DEVICE) return 0; - if (ctask->unsol_count != 0) { - struct iscsi_data *hdr = &tcp_ctask->unsol_dtask.hdr; + sdb = scsi_out(sc); + if (task->unsol_count != 0) { + struct iscsi_data *hdr = &tcp_task->unsol_dtask.hdr; /* Prepare a header for the unsolicited PDU. * The amount of data we want to send will be - * in ctask->data_count. + * in task->data_count. * FIXME: return the data count instead. */ - iscsi_prep_unsolicit_data_pdu(ctask, hdr); + iscsi_prep_unsolicit_data_pdu(task, hdr); debug_tcp("unsol dout [itt 0x%x doff %d dlen %d]\n", - ctask->itt, tcp_ctask->sent, ctask->data_count); + task->itt, tcp_task->sent, task->data_count); iscsi_tcp_send_hdr_prep(conn, hdr, sizeof(*hdr)); rc = iscsi_tcp_send_data_prep(conn, sdb->table.sgl, - sdb->table.nents, tcp_ctask->sent, - ctask->data_count); + sdb->table.nents, tcp_task->sent, + task->data_count); if (rc) goto fail; - tcp_ctask->sent += ctask->data_count; - ctask->unsol_count -= ctask->data_count; + tcp_task->sent += task->data_count; + task->unsol_count -= task->data_count; goto flush; } else { struct iscsi_session *session = conn->session; @@ -1431,22 +1443,22 @@ flush: /* All unsolicited PDUs sent. Check for solicited PDUs. */ spin_lock_bh(&session->lock); - r2t = tcp_ctask->r2t; + r2t = tcp_task->r2t; if (r2t != NULL) { /* Continue with this R2T? */ - if (!iscsi_solicit_data_cont(conn, ctask, r2t)) { + if (!iscsi_solicit_data_cont(conn, task, r2t)) { debug_scsi(" done with r2t %p\n", r2t); - __kfifo_put(tcp_ctask->r2tpool.queue, + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); - tcp_ctask->r2t = r2t = NULL; + tcp_task->r2t = r2t = NULL; } } if (r2t == NULL) { - __kfifo_get(tcp_ctask->r2tqueue, (void*)&tcp_ctask->r2t, + __kfifo_get(tcp_task->r2tqueue, (void*)&tcp_task->r2t, sizeof(void*)); - r2t = tcp_ctask->r2t; + r2t = tcp_task->r2t; } spin_unlock_bh(&session->lock); @@ -1457,7 +1469,7 @@ flush: } debug_scsi("sol dout %p [dsn %d itt 0x%x doff %d dlen %d]\n", - r2t, r2t->solicit_datasn - 1, ctask->itt, + r2t, r2t->solicit_datasn - 1, task->itt, r2t->data_offset + r2t->sent, r2t->data_count); iscsi_tcp_send_hdr_prep(conn, &r2t->dtask.hdr, @@ -1469,7 +1481,7 @@ flush: r2t->data_count); if (rc) goto fail; - tcp_ctask->sent += r2t->data_count; + tcp_task->sent += r2t->data_count; r2t->sent += r2t->data_count; goto flush; } @@ -1486,7 +1498,7 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) struct iscsi_cls_conn *cls_conn; struct iscsi_tcp_conn *tcp_conn; - cls_conn = iscsi_conn_setup(cls_session, conn_idx); + cls_conn = iscsi_conn_setup(cls_session, sizeof(*tcp_conn), conn_idx); if (!cls_conn) return NULL; conn = cls_conn->dd_data; @@ -1496,18 +1508,14 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) */ conn->max_recv_dlength = ISCSI_DEF_MAX_RECV_SEG_LEN; - tcp_conn = kzalloc(sizeof(*tcp_conn), GFP_KERNEL); - if (!tcp_conn) - goto tcp_conn_alloc_fail; - - conn->dd_data = tcp_conn; + tcp_conn = conn->dd_data; tcp_conn->iscsi_conn = conn; tcp_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC); tcp_conn->tx_hash.flags = 0; if (IS_ERR(tcp_conn->tx_hash.tfm)) - goto free_tcp_conn; + goto free_conn; tcp_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC); @@ -1519,14 +1527,12 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) free_tx_tfm: crypto_free_hash(tcp_conn->tx_hash.tfm); -free_tcp_conn: +free_conn: iscsi_conn_printk(KERN_ERR, conn, "Could not create connection due to crc32c " "loading error. Make sure the crc32c " "module is built as a module or into the " "kernel\n"); - kfree(tcp_conn); -tcp_conn_alloc_fail: iscsi_conn_teardown(cls_conn); return NULL; } @@ -1547,7 +1553,6 @@ iscsi_tcp_release_conn(struct iscsi_conn *conn) spin_lock_bh(&session->lock); tcp_conn->sock = NULL; - conn->recv_lock = NULL; spin_unlock_bh(&session->lock); sockfd_put(sock); } @@ -1559,20 +1564,32 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn) struct iscsi_tcp_conn *tcp_conn = conn->dd_data; iscsi_tcp_release_conn(conn); - iscsi_conn_teardown(cls_conn); if (tcp_conn->tx_hash.tfm) crypto_free_hash(tcp_conn->tx_hash.tfm); if (tcp_conn->rx_hash.tfm) crypto_free_hash(tcp_conn->rx_hash.tfm); - kfree(tcp_conn); + iscsi_conn_teardown(cls_conn); } static void iscsi_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) { struct iscsi_conn *conn = cls_conn->dd_data; + struct iscsi_tcp_conn *tcp_conn = conn->dd_data; + + /* userspace may have goofed up and not bound us */ + if (!tcp_conn->sock) + return; + /* + * Make sure our recv side is stopped. + * Older tools called conn stop before ep_disconnect + * so IO could still be coming in. + */ + write_lock_bh(&tcp_conn->sock->sk->sk_callback_lock); + set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); + write_unlock_bh(&tcp_conn->sock->sk->sk_callback_lock); iscsi_conn_stop(cls_conn, flag); iscsi_tcp_release_conn(conn); @@ -1623,6 +1640,8 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, int is_leading) { + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); + struct iscsi_host *ihost = shost_priv(shost); struct iscsi_conn *conn = cls_conn->dd_data; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct sock *sk; @@ -1646,8 +1665,8 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session, if (err) goto free_socket; - err = iscsi_tcp_get_addr(conn, sock, conn->local_address, - &conn->local_port, kernel_getsockname); + err = iscsi_tcp_get_addr(conn, sock, ihost->local_address, + &ihost->local_port, kernel_getsockname); if (err) goto free_socket; @@ -1664,13 +1683,6 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session, sk->sk_sndtimeo = 15 * HZ; /* FIXME: make it configurable */ sk->sk_allocation = GFP_ATOMIC; - /* FIXME: disable Nagle's algorithm */ - - /* - * Intercept TCP callbacks for sendfile like receive - * processing. - */ - conn->recv_lock = &sk->sk_callback_lock; iscsi_conn_set_callbacks(conn); tcp_conn->sendpage = tcp_conn->sock->ops->sendpage; /* @@ -1684,21 +1696,6 @@ free_socket: return err; } -/* called with host lock */ -static void -iscsi_tcp_mtask_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask) -{ - debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, mtask->itt); - - /* Prepare PDU, optionally w/ immediate data */ - iscsi_tcp_send_hdr_prep(conn, mtask->hdr, sizeof(*mtask->hdr)); - - /* If we have immediate data, attach a payload */ - if (mtask->data_count) - iscsi_tcp_send_linear_data_prepare(conn, mtask->data, - mtask->data_count); -} - static int iscsi_r2tpool_alloc(struct iscsi_session *session) { @@ -1709,8 +1706,8 @@ iscsi_r2tpool_alloc(struct iscsi_session *session) * initialize per-task: R2T pool and xmit queue */ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { - struct iscsi_cmd_task *ctask = session->cmds[cmd_i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_task *task = session->cmds[cmd_i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; /* * pre-allocated x4 as much r2ts to handle race when @@ -1719,16 +1716,16 @@ iscsi_r2tpool_alloc(struct iscsi_session *session) */ /* R2T pool */ - if (iscsi_pool_init(&tcp_ctask->r2tpool, session->max_r2t * 4, NULL, + if (iscsi_pool_init(&tcp_task->r2tpool, session->max_r2t * 4, NULL, sizeof(struct iscsi_r2t_info))) { goto r2t_alloc_fail; } /* R2T xmit queue */ - tcp_ctask->r2tqueue = kfifo_alloc( + tcp_task->r2tqueue = kfifo_alloc( session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL); - if (tcp_ctask->r2tqueue == ERR_PTR(-ENOMEM)) { - iscsi_pool_free(&tcp_ctask->r2tpool); + if (tcp_task->r2tqueue == ERR_PTR(-ENOMEM)) { + iscsi_pool_free(&tcp_task->r2tpool); goto r2t_alloc_fail; } } @@ -1737,11 +1734,11 @@ iscsi_r2tpool_alloc(struct iscsi_session *session) r2t_alloc_fail: for (i = 0; i < cmd_i; i++) { - struct iscsi_cmd_task *ctask = session->cmds[i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_task *task = session->cmds[i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; - kfifo_free(tcp_ctask->r2tqueue); - iscsi_pool_free(&tcp_ctask->r2tpool); + kfifo_free(tcp_task->r2tqueue); + iscsi_pool_free(&tcp_task->r2tpool); } return -ENOMEM; } @@ -1752,11 +1749,11 @@ iscsi_r2tpool_free(struct iscsi_session *session) int i; for (i = 0; i < session->cmds_max; i++) { - struct iscsi_cmd_task *ctask = session->cmds[i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_task *task = session->cmds[i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; - kfifo_free(tcp_ctask->r2tqueue); - iscsi_pool_free(&tcp_ctask->r2tpool); + kfifo_free(tcp_task->r2tqueue); + iscsi_pool_free(&tcp_task->r2tpool); } } @@ -1821,29 +1818,6 @@ iscsi_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn, return len; } -static int -iscsi_tcp_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, - char *buf) -{ - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); - int len; - - switch (param) { - case ISCSI_HOST_PARAM_IPADDRESS: - spin_lock_bh(&session->lock); - if (!session->leadconn) - len = -ENODEV; - else - len = sprintf(buf, "%s\n", - session->leadconn->local_address); - spin_unlock_bh(&session->lock); - break; - default: - return iscsi_host_get_param(shost, param, buf); - } - return len; -} - static void iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) { @@ -1869,54 +1843,70 @@ iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) } static struct iscsi_cls_session * -iscsi_tcp_session_create(struct iscsi_transport *iscsit, - struct scsi_transport_template *scsit, - uint16_t cmds_max, uint16_t qdepth, - uint32_t initial_cmdsn, uint32_t *hostno) +iscsi_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max, + uint16_t qdepth, uint32_t initial_cmdsn, + uint32_t *hostno) { struct iscsi_cls_session *cls_session; struct iscsi_session *session; - uint32_t hn; + struct Scsi_Host *shost; int cmd_i; - cls_session = iscsi_session_setup(iscsit, scsit, cmds_max, qdepth, - sizeof(struct iscsi_tcp_cmd_task), - sizeof(struct iscsi_tcp_mgmt_task), - initial_cmdsn, &hn); - if (!cls_session) + if (ep) { + printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep); return NULL; - *hostno = hn; - - session = class_to_transport_session(cls_session); - for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { - struct iscsi_cmd_task *ctask = session->cmds[cmd_i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; - - ctask->hdr = &tcp_ctask->hdr.cmd_hdr; - ctask->hdr_max = sizeof(tcp_ctask->hdr) - ISCSI_DIGEST_SIZE; } - for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) { - struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i]; - struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data; + shost = iscsi_host_alloc(&iscsi_sht, 0, qdepth); + if (!shost) + return NULL; + shost->transportt = iscsi_tcp_scsi_transport; + shost->max_lun = iscsi_max_lun; + shost->max_id = 0; + shost->max_channel = 0; + shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE; + + if (iscsi_host_add(shost, NULL)) + goto free_host; + *hostno = shost->host_no; + + cls_session = iscsi_session_setup(&iscsi_tcp_transport, shost, cmds_max, + sizeof(struct iscsi_tcp_task), + initial_cmdsn, 0); + if (!cls_session) + goto remove_host; + session = cls_session->dd_data; + + shost->can_queue = session->scsi_cmds_max; + for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { + struct iscsi_task *task = session->cmds[cmd_i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; - mtask->hdr = (struct iscsi_hdr *) &tcp_mtask->hdr; + task->hdr = &tcp_task->hdr.cmd_hdr; + task->hdr_max = sizeof(tcp_task->hdr) - ISCSI_DIGEST_SIZE; } - if (iscsi_r2tpool_alloc(class_to_transport_session(cls_session))) - goto r2tpool_alloc_fail; - + if (iscsi_r2tpool_alloc(session)) + goto remove_session; return cls_session; -r2tpool_alloc_fail: +remove_session: iscsi_session_teardown(cls_session); +remove_host: + iscsi_host_remove(shost); +free_host: + iscsi_host_free(shost); return NULL; } static void iscsi_tcp_session_destroy(struct iscsi_cls_session *cls_session) { - iscsi_r2tpool_free(class_to_transport_session(cls_session)); - iscsi_session_teardown(cls_session); + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); + + iscsi_r2tpool_free(cls_session->dd_data); + + iscsi_host_remove(shost); + iscsi_host_free(shost); } static int iscsi_tcp_slave_configure(struct scsi_device *sdev) @@ -1971,14 +1961,11 @@ static struct iscsi_transport iscsi_tcp_transport = { ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | ISCSI_LU_RESET_TMO | - ISCSI_PING_TMO | ISCSI_RECV_TMO, + ISCSI_PING_TMO | ISCSI_RECV_TMO | + ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | ISCSI_HOST_INITIATOR_NAME | ISCSI_HOST_NETDEV_NAME, - .host_template = &iscsi_sht, - .conndata_size = sizeof(struct iscsi_conn), - .max_conn = 1, - .max_cmd_len = 16, /* session management */ .create_session = iscsi_tcp_session_create, .destroy_session = iscsi_tcp_session_destroy, @@ -1992,16 +1979,14 @@ static struct iscsi_transport iscsi_tcp_transport = { .start_conn = iscsi_conn_start, .stop_conn = iscsi_tcp_conn_stop, /* iscsi host params */ - .get_host_param = iscsi_tcp_host_get_param, + .get_host_param = iscsi_host_get_param, .set_host_param = iscsi_host_set_param, /* IO */ .send_pdu = iscsi_conn_send_pdu, .get_stats = iscsi_conn_get_stats, - .init_cmd_task = iscsi_tcp_ctask_init, - .init_mgmt_task = iscsi_tcp_mtask_init, - .xmit_cmd_task = iscsi_tcp_ctask_xmit, - .xmit_mgmt_task = iscsi_tcp_mtask_xmit, - .cleanup_cmd_task = iscsi_tcp_cleanup_ctask, + .init_task = iscsi_tcp_task_init, + .xmit_task = iscsi_tcp_task_xmit, + .cleanup_task = iscsi_tcp_cleanup_task, /* recovery */ .session_recovery_timedout = iscsi_session_recovery_timedout, }; @@ -2014,9 +1999,10 @@ iscsi_tcp_init(void) iscsi_max_lun); return -EINVAL; } - iscsi_tcp_transport.max_lun = iscsi_max_lun; - if (!iscsi_register_transport(&iscsi_tcp_transport)) + iscsi_tcp_scsi_transport = iscsi_register_transport( + &iscsi_tcp_transport); + if (!iscsi_tcp_scsi_transport) return -ENODEV; return 0; diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h index ed0b991..498d8ca 100644 --- a/drivers/scsi/iscsi_tcp.h +++ b/drivers/scsi/iscsi_tcp.h @@ -103,11 +103,6 @@ struct iscsi_data_task { char hdrext[ISCSI_DIGEST_SIZE];/* Header-Digest */ }; -struct iscsi_tcp_mgmt_task { - struct iscsi_hdr hdr; - char hdrext[ISCSI_DIGEST_SIZE]; /* Header-Digest */ -}; - struct iscsi_r2t_info { __be32 ttt; /* copied from R2T */ __be32 exp_statsn; /* copied from R2T */ @@ -119,7 +114,7 @@ struct iscsi_r2t_info { struct iscsi_data_task dtask; /* Data-Out header buf */ }; -struct iscsi_tcp_cmd_task { +struct iscsi_tcp_task { struct iscsi_hdr_buff { struct iscsi_cmd cmd_hdr; char hdrextbuf[ISCSI_MAX_AHS_SIZE + diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index b43bf1d..299e075 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -38,14 +38,6 @@ #include <scsi/scsi_transport_iscsi.h> #include <scsi/libiscsi.h> -struct iscsi_session * -class_to_transport_session(struct iscsi_cls_session *cls_session) -{ - struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); - return iscsi_hostdata(shost->hostdata); -} -EXPORT_SYMBOL_GPL(class_to_transport_session); - /* Serial Number Arithmetic, 32 bits, less than, RFC1982 */ #define SNA32_CHECK 2147483648UL @@ -87,68 +79,70 @@ iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr) * xmit thread */ if (!list_empty(&session->leadconn->xmitqueue) || - !list_empty(&session->leadconn->mgmtqueue)) - scsi_queue_work(session->host, - &session->leadconn->xmitwork); + !list_empty(&session->leadconn->mgmtqueue)) { + if (!(session->tt->caps & CAP_DATA_PATH_OFFLOAD)) + scsi_queue_work(session->host, + &session->leadconn->xmitwork); + } } } EXPORT_SYMBOL_GPL(iscsi_update_cmdsn); -void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *ctask, +void iscsi_prep_unsolicit_data_pdu(struct iscsi_task *task, struct iscsi_data *hdr) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; memset(hdr, 0, sizeof(struct iscsi_data)); hdr->ttt = cpu_to_be32(ISCSI_RESERVED_TAG); - hdr->datasn = cpu_to_be32(ctask->unsol_datasn); - ctask->unsol_datasn++; + hdr->datasn = cpu_to_be32(task->unsol_datasn); + task->unsol_datasn++; hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); - hdr->itt = ctask->hdr->itt; + hdr->itt = task->hdr->itt; hdr->exp_statsn = cpu_to_be32(conn->exp_statsn); - hdr->offset = cpu_to_be32(ctask->unsol_offset); + hdr->offset = cpu_to_be32(task->unsol_offset); - if (ctask->unsol_count > conn->max_xmit_dlength) { + if (task->unsol_count > conn->max_xmit_dlength) { hton24(hdr->dlength, conn->max_xmit_dlength); - ctask->data_count = conn->max_xmit_dlength; - ctask->unsol_offset += ctask->data_count; + task->data_count = conn->max_xmit_dlength; + task->unsol_offset += task->data_count; hdr->flags = 0; } else { - hton24(hdr->dlength, ctask->unsol_count); - ctask->data_count = ctask->unsol_count; + hton24(hdr->dlength, task->unsol_count); + task->data_count = task->unsol_count; hdr->flags = ISCSI_FLAG_CMD_FINAL; } } EXPORT_SYMBOL_GPL(iscsi_prep_unsolicit_data_pdu); -static int iscsi_add_hdr(struct iscsi_cmd_task *ctask, unsigned len) +static int iscsi_add_hdr(struct iscsi_task *task, unsigned len) { - unsigned exp_len = ctask->hdr_len + len; + unsigned exp_len = task->hdr_len + len; - if (exp_len > ctask->hdr_max) { + if (exp_len > task->hdr_max) { WARN_ON(1); return -EINVAL; } WARN_ON(len & (ISCSI_PAD_LEN - 1)); /* caller must pad the AHS */ - ctask->hdr_len = exp_len; + task->hdr_len = exp_len; return 0; } /* * make an extended cdb AHS */ -static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask) +static int iscsi_prep_ecdb_ahs(struct iscsi_task *task) { - struct scsi_cmnd *cmd = ctask->sc; + struct scsi_cmnd *cmd = task->sc; unsigned rlen, pad_len; unsigned short ahslength; struct iscsi_ecdb_ahdr *ecdb_ahdr; int rc; - ecdb_ahdr = iscsi_next_hdr(ctask); + ecdb_ahdr = iscsi_next_hdr(task); rlen = cmd->cmd_len - ISCSI_CDB_SIZE; BUG_ON(rlen > sizeof(ecdb_ahdr->ecdb)); @@ -156,7 +150,7 @@ static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask) pad_len = iscsi_padding(rlen); - rc = iscsi_add_hdr(ctask, sizeof(ecdb_ahdr->ahslength) + + rc = iscsi_add_hdr(task, sizeof(ecdb_ahdr->ahslength) + sizeof(ecdb_ahdr->ahstype) + ahslength + pad_len); if (rc) return rc; @@ -171,19 +165,19 @@ static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask) debug_scsi("iscsi_prep_ecdb_ahs: varlen_cdb_len %d " "rlen %d pad_len %d ahs_length %d iscsi_headers_size %u\n", - cmd->cmd_len, rlen, pad_len, ahslength, ctask->hdr_len); + cmd->cmd_len, rlen, pad_len, ahslength, task->hdr_len); return 0; } -static int iscsi_prep_bidi_ahs(struct iscsi_cmd_task *ctask) +static int iscsi_prep_bidi_ahs(struct iscsi_task *task) { - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; struct iscsi_rlength_ahdr *rlen_ahdr; int rc; - rlen_ahdr = iscsi_next_hdr(ctask); - rc = iscsi_add_hdr(ctask, sizeof(*rlen_ahdr)); + rlen_ahdr = iscsi_next_hdr(task); + rc = iscsi_add_hdr(task, sizeof(*rlen_ahdr)); if (rc) return rc; @@ -203,28 +197,28 @@ static int iscsi_prep_bidi_ahs(struct iscsi_cmd_task *ctask) /** * iscsi_prep_scsi_cmd_pdu - prep iscsi scsi cmd pdu - * @ctask: iscsi cmd task + * @task: iscsi task * * Prep basic iSCSI PDU fields for a scsi cmd pdu. The LLD should set * fields like dlength or final based on how much data it sends */ -static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) +static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; struct iscsi_session *session = conn->session; - struct iscsi_cmd *hdr = ctask->hdr; - struct scsi_cmnd *sc = ctask->sc; + struct iscsi_cmd *hdr = task->hdr; + struct scsi_cmnd *sc = task->sc; unsigned hdrlength, cmd_len; int rc; - ctask->hdr_len = 0; - rc = iscsi_add_hdr(ctask, sizeof(*hdr)); + task->hdr_len = 0; + rc = iscsi_add_hdr(task, sizeof(*hdr)); if (rc) return rc; hdr->opcode = ISCSI_OP_SCSI_CMD; hdr->flags = ISCSI_ATTR_SIMPLE; int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun); - hdr->itt = build_itt(ctask->itt, session->age); + hdr->itt = build_itt(task->itt, session->age); hdr->cmdsn = cpu_to_be32(session->cmdsn); session->cmdsn++; hdr->exp_statsn = cpu_to_be32(conn->exp_statsn); @@ -232,17 +226,17 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) if (cmd_len < ISCSI_CDB_SIZE) memset(&hdr->cdb[cmd_len], 0, ISCSI_CDB_SIZE - cmd_len); else if (cmd_len > ISCSI_CDB_SIZE) { - rc = iscsi_prep_ecdb_ahs(ctask); + rc = iscsi_prep_ecdb_ahs(task); if (rc) return rc; cmd_len = ISCSI_CDB_SIZE; } memcpy(hdr->cdb, sc->cmnd, cmd_len); - ctask->imm_count = 0; + task->imm_count = 0; if (scsi_bidi_cmnd(sc)) { hdr->flags |= ISCSI_FLAG_CMD_READ; - rc = iscsi_prep_bidi_ahs(ctask); + rc = iscsi_prep_bidi_ahs(task); if (rc) return rc; } @@ -264,28 +258,28 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) * * pad_count bytes to be sent as zero-padding */ - ctask->unsol_count = 0; - ctask->unsol_offset = 0; - ctask->unsol_datasn = 0; + task->unsol_count = 0; + task->unsol_offset = 0; + task->unsol_datasn = 0; if (session->imm_data_en) { if (out_len >= session->first_burst) - ctask->imm_count = min(session->first_burst, + task->imm_count = min(session->first_burst, conn->max_xmit_dlength); else - ctask->imm_count = min(out_len, + task->imm_count = min(out_len, conn->max_xmit_dlength); - hton24(hdr->dlength, ctask->imm_count); + hton24(hdr->dlength, task->imm_count); } else zero_data(hdr->dlength); if (!session->initial_r2t_en) { - ctask->unsol_count = min(session->first_burst, out_len) - - ctask->imm_count; - ctask->unsol_offset = ctask->imm_count; + task->unsol_count = min(session->first_burst, out_len) + - task->imm_count; + task->unsol_offset = task->imm_count; } - if (!ctask->unsol_count) + if (!task->unsol_count) /* No unsolicit Data-Out's */ hdr->flags |= ISCSI_FLAG_CMD_FINAL; } else { @@ -298,7 +292,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) } /* calculate size of additional header segments (AHSs) */ - hdrlength = ctask->hdr_len - sizeof(*hdr); + hdrlength = task->hdr_len - sizeof(*hdr); WARN_ON(hdrlength & (ISCSI_PAD_LEN-1)); hdrlength /= ISCSI_PAD_LEN; @@ -306,76 +300,115 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) WARN_ON(hdrlength >= 256); hdr->hlength = hdrlength & 0xFF; - if (conn->session->tt->init_cmd_task(conn->ctask)) - return EIO; + if (conn->session->tt->init_task && + conn->session->tt->init_task(task)) + return -EIO; + + task->state = ISCSI_TASK_RUNNING; + list_move_tail(&task->running, &conn->run_list); conn->scsicmd_pdus_cnt++; - debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x " - "len %d bidi_len %d cmdsn %d win %d]\n", - scsi_bidi_cmnd(sc) ? "bidirectional" : - sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read", - conn->id, sc, sc->cmnd[0], ctask->itt, - scsi_bufflen(sc), scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, - session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1); + debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x len %d " + "bidi_len %d cmdsn %d win %d]\n", scsi_bidi_cmnd(sc) ? + "bidirectional" : sc->sc_data_direction == DMA_TO_DEVICE ? + "write" : "read", conn->id, sc, sc->cmnd[0], task->itt, + scsi_bufflen(sc), + scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, + session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1); return 0; } /** - * iscsi_complete_command - return command back to scsi-ml - * @ctask: iscsi cmd task + * iscsi_complete_command - finish a task + * @task: iscsi cmd task * * Must be called with session lock. - * This function returns the scsi command to scsi-ml and returns - * the cmd task to the pool of available cmd tasks. + * This function returns the scsi command to scsi-ml or cleans + * up mgmt tasks then returns the task to the pool. */ -static void iscsi_complete_command(struct iscsi_cmd_task *ctask) +static void iscsi_complete_command(struct iscsi_task *task) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; struct iscsi_session *session = conn->session; - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; - ctask->state = ISCSI_TASK_COMPLETED; - ctask->sc = NULL; - /* SCSI eh reuses commands to verify us */ - sc->SCp.ptr = NULL; - if (conn->ctask == ctask) - conn->ctask = NULL; - list_del_init(&ctask->running); - __kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*)); - sc->scsi_done(sc); + list_del_init(&task->running); + task->state = ISCSI_TASK_COMPLETED; + task->sc = NULL; + + if (conn->task == task) + conn->task = NULL; + /* + * login task is preallocated so do not free + */ + if (conn->login_task == task) + return; + + __kfifo_put(session->cmdpool.queue, (void*)&task, sizeof(void*)); + + if (conn->ping_task == task) + conn->ping_task = NULL; + + if (sc) { + task->sc = NULL; + /* SCSI eh reuses commands to verify us */ + sc->SCp.ptr = NULL; + /* + * queue command may call this to free the task, but + * not have setup the sc callback + */ + if (sc->scsi_done) + sc->scsi_done(sc); + } +} + +void __iscsi_get_task(struct iscsi_task *task) +{ + atomic_inc(&task->refcount); } +EXPORT_SYMBOL_GPL(__iscsi_get_task); -static void __iscsi_get_ctask(struct iscsi_cmd_task *ctask) +static void __iscsi_put_task(struct iscsi_task *task) { - atomic_inc(&ctask->refcount); + if (atomic_dec_and_test(&task->refcount)) + iscsi_complete_command(task); } -static void __iscsi_put_ctask(struct iscsi_cmd_task *ctask) +void iscsi_put_task(struct iscsi_task *task) { - if (atomic_dec_and_test(&ctask->refcount)) - iscsi_complete_command(ctask); + struct iscsi_session *session = task->conn->session; + + spin_lock_bh(&session->lock); + __iscsi_put_task(task); + spin_unlock_bh(&session->lock); } +EXPORT_SYMBOL_GPL(iscsi_put_task); /* * session lock must be held */ -static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, +static void fail_command(struct iscsi_conn *conn, struct iscsi_task *task, int err) { struct scsi_cmnd *sc; - sc = ctask->sc; + sc = task->sc; if (!sc) return; - if (ctask->state == ISCSI_TASK_PENDING) + if (task->state == ISCSI_TASK_PENDING) /* * cmd never made it to the xmit thread, so we should not count * the cmd in the sequencing */ conn->session->queued_cmdsn--; else - conn->session->tt->cleanup_cmd_task(conn, ctask); + conn->session->tt->cleanup_task(conn, task); + /* + * Check if cleanup_task dropped the lock and the command completed, + */ + if (!task->sc) + return; sc->result = err; if (!scsi_bidi_cmnd(sc)) @@ -384,39 +417,63 @@ static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, scsi_out(sc)->resid = scsi_out(sc)->length; scsi_in(sc)->resid = scsi_in(sc)->length; } - if (conn->ctask == ctask) - conn->ctask = NULL; + + if (conn->task == task) + conn->task = NULL; /* release ref from queuecommand */ - __iscsi_put_ctask(ctask); + __iscsi_put_task(task); } -/** - * iscsi_free_mgmt_task - return mgmt task back to pool - * @conn: iscsi connection - * @mtask: mtask - * - * Must be called with session lock. - */ -void iscsi_free_mgmt_task(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask) +static int iscsi_prep_mgmt_task(struct iscsi_conn *conn, + struct iscsi_task *task) { - list_del_init(&mtask->running); - if (conn->login_mtask == mtask) - return; + struct iscsi_session *session = conn->session; + struct iscsi_hdr *hdr = (struct iscsi_hdr *)task->hdr; + struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr; + + if (conn->session->state == ISCSI_STATE_LOGGING_OUT) + return -ENOTCONN; + + if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) && + hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE)) + nop->exp_statsn = cpu_to_be32(conn->exp_statsn); + /* + * pre-format CmdSN for outgoing PDU. + */ + nop->cmdsn = cpu_to_be32(session->cmdsn); + if (hdr->itt != RESERVED_ITT) { + hdr->itt = build_itt(task->itt, session->age); + /* + * TODO: We always use immediate, so we never hit this. + * If we start to send tmfs or nops as non-immediate then + * we should start checking the cmdsn numbers for mgmt tasks. + */ + if (conn->c_stage == ISCSI_CONN_STARTED && + !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { + session->queued_cmdsn++; + session->cmdsn++; + } + } - if (conn->ping_mtask == mtask) - conn->ping_mtask = NULL; - __kfifo_put(conn->session->mgmtpool.queue, - (void*)&mtask, sizeof(void*)); + if (session->tt->init_task) + session->tt->init_task(task); + + if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) + session->state = ISCSI_STATE_LOGGING_OUT; + + list_move_tail(&task->running, &conn->mgmt_run_list); + debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n", + hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt, + task->data_count); + return 0; } -EXPORT_SYMBOL_GPL(iscsi_free_mgmt_task); -static struct iscsi_mgmt_task * +static struct iscsi_task * __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, char *data, uint32_t data_size) { struct iscsi_session *session = conn->session; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; if (session->state == ISCSI_STATE_TERMINATE) return NULL; @@ -426,29 +483,56 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, /* * Login and Text are sent serially, in * request-followed-by-response sequence. - * Same mtask can be used. Same ITT must be used. - * Note that login_mtask is preallocated at conn_create(). + * Same task can be used. Same ITT must be used. + * Note that login_task is preallocated at conn_create(). */ - mtask = conn->login_mtask; + task = conn->login_task; else { BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE); BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED); - if (!__kfifo_get(session->mgmtpool.queue, - (void*)&mtask, sizeof(void*))) + if (!__kfifo_get(session->cmdpool.queue, + (void*)&task, sizeof(void*))) return NULL; + + if ((hdr->opcode == (ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE)) && + hdr->ttt == RESERVED_ITT) { + conn->ping_task = task; + conn->last_ping = jiffies; + } } + /* + * released in complete pdu for task we expect a response for, and + * released by the lld when it has transmitted the task for + * pdus we do not expect a response for. + */ + atomic_set(&task->refcount, 1); + task->conn = conn; + task->sc = NULL; if (data_size) { - memcpy(mtask->data, data, data_size); - mtask->data_count = data_size; + memcpy(task->data, data, data_size); + task->data_count = data_size; + } else + task->data_count = 0; + + memcpy(task->hdr, hdr, sizeof(struct iscsi_hdr)); + INIT_LIST_HEAD(&task->running); + list_add_tail(&task->running, &conn->mgmtqueue); + + if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) { + if (iscsi_prep_mgmt_task(conn, task)) { + __iscsi_put_task(task); + return NULL; + } + + if (session->tt->xmit_task(task)) + task = NULL; + } else - mtask->data_count = 0; + scsi_queue_work(conn->session->host, &conn->xmitwork); - memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr)); - INIT_LIST_HEAD(&mtask->running); - list_add_tail(&mtask->running, &conn->mgmtqueue); - return mtask; + return task; } int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr, @@ -462,7 +546,6 @@ int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr, if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size)) err = -EPERM; spin_unlock_bh(&session->lock); - scsi_queue_work(session->host, &conn->xmitwork); return err; } EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); @@ -471,7 +554,7 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); * iscsi_cmd_rsp - SCSI Command Response processing * @conn: iscsi connection * @hdr: iscsi header - * @ctask: scsi command task + * @task: scsi command task * @data: cmd data buffer * @datalen: len of buffer * @@ -479,12 +562,12 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); * then completes the command and task. **/ static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr, - struct iscsi_cmd_task *ctask, char *data, + struct iscsi_task *task, char *data, int datalen) { struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)hdr; struct iscsi_session *session = conn->session; - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1; @@ -508,7 +591,7 @@ invalid_datalen: goto out; } - senselen = be16_to_cpu(get_unaligned((__be16 *) data)); + senselen = get_unaligned_be16(data); if (datalen < senselen) goto invalid_datalen; @@ -544,10 +627,10 @@ invalid_datalen: } out: debug_scsi("done [sc %lx res %d itt 0x%x]\n", - (long)sc, sc->result, ctask->itt); + (long)sc, sc->result, task->itt); conn->scsirsp_pdus_cnt++; - __iscsi_put_ctask(ctask); + __iscsi_put_task(task); } static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) @@ -572,9 +655,9 @@ static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) { struct iscsi_nopout hdr; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; - if (!rhdr && conn->ping_mtask) + if (!rhdr && conn->ping_task) return; memset(&hdr, 0, sizeof(struct iscsi_nopout)); @@ -588,18 +671,9 @@ static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) } else hdr.ttt = RESERVED_ITT; - mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); - if (!mtask) { + task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); + if (!task) iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n"); - return; - } - - /* only track our nops */ - if (!rhdr) { - conn->ping_mtask = mtask; - conn->last_ping = jiffies; - } - scsi_queue_work(conn->session->host, &conn->xmitwork); } static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, @@ -628,6 +702,31 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, } /** + * iscsi_itt_to_task - look up task by itt + * @conn: iscsi connection + * @itt: itt + * + * This should be used for mgmt tasks like login and nops, or if + * the LDD's itt space does not include the session age. + * + * The session lock must be held. + */ +static struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt) +{ + struct iscsi_session *session = conn->session; + uint32_t i; + + if (itt == RESERVED_ITT) + return NULL; + + i = get_itt(itt); + if (i >= session->cmds_max) + return NULL; + + return session->cmds[i]; +} + +/** * __iscsi_complete_pdu - complete pdu * @conn: iscsi conn * @hdr: iscsi header @@ -638,108 +737,28 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, * queuecommand or send generic. session lock must be held and verify * itt must have been called. */ -static int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, - char *data, int datalen) +int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, + char *data, int datalen) { struct iscsi_session *session = conn->session; int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0; - struct iscsi_cmd_task *ctask; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; uint32_t itt; conn->last_recv = jiffies; + rc = iscsi_verify_itt(conn, hdr->itt); + if (rc) + return rc; + if (hdr->itt != RESERVED_ITT) itt = get_itt(hdr->itt); else itt = ~0U; - if (itt < session->cmds_max) { - ctask = session->cmds[itt]; - - debug_scsi("cmdrsp [op 0x%x cid %d itt 0x%x len %d]\n", - opcode, conn->id, ctask->itt, datalen); - - switch(opcode) { - case ISCSI_OP_SCSI_CMD_RSP: - BUG_ON((void*)ctask != ctask->sc->SCp.ptr); - iscsi_scsi_cmd_rsp(conn, hdr, ctask, data, - datalen); - break; - case ISCSI_OP_SCSI_DATA_IN: - BUG_ON((void*)ctask != ctask->sc->SCp.ptr); - if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { - conn->scsirsp_pdus_cnt++; - __iscsi_put_ctask(ctask); - } - break; - case ISCSI_OP_R2T: - /* LLD handles this for now */ - break; - default: - rc = ISCSI_ERR_BAD_OPCODE; - break; - } - } else if (itt >= ISCSI_MGMT_ITT_OFFSET && - itt < ISCSI_MGMT_ITT_OFFSET + session->mgmtpool_max) { - mtask = session->mgmt_cmds[itt - ISCSI_MGMT_ITT_OFFSET]; - - debug_scsi("immrsp [op 0x%x cid %d itt 0x%x len %d]\n", - opcode, conn->id, mtask->itt, datalen); + debug_scsi("[op 0x%x cid %d itt 0x%x len %d]\n", + opcode, conn->id, itt, datalen); - iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); - switch(opcode) { - case ISCSI_OP_LOGOUT_RSP: - if (datalen) { - rc = ISCSI_ERR_PROTO; - break; - } - conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; - /* fall through */ - case ISCSI_OP_LOGIN_RSP: - case ISCSI_OP_TEXT_RSP: - /* - * login related PDU's exp_statsn is handled in - * userspace - */ - if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) - rc = ISCSI_ERR_CONN_FAILED; - iscsi_free_mgmt_task(conn, mtask); - break; - case ISCSI_OP_SCSI_TMFUNC_RSP: - if (datalen) { - rc = ISCSI_ERR_PROTO; - break; - } - - iscsi_tmf_rsp(conn, hdr); - iscsi_free_mgmt_task(conn, mtask); - break; - case ISCSI_OP_NOOP_IN: - if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || - datalen) { - rc = ISCSI_ERR_PROTO; - break; - } - conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; - - if (conn->ping_mtask != mtask) { - /* - * If this is not in response to one of our - * nops then it must be from userspace. - */ - if (iscsi_recv_pdu(conn->cls_conn, hdr, data, - datalen)) - rc = ISCSI_ERR_CONN_FAILED; - } else - mod_timer(&conn->transport_timer, - jiffies + conn->recv_timeout); - iscsi_free_mgmt_task(conn, mtask); - break; - default: - rc = ISCSI_ERR_BAD_OPCODE; - break; - } - } else if (itt == ~0U) { + if (itt == ~0U) { iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); switch(opcode) { @@ -766,11 +785,104 @@ static int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, rc = ISCSI_ERR_BAD_OPCODE; break; } - } else - rc = ISCSI_ERR_BAD_ITT; + goto out; + } + switch(opcode) { + case ISCSI_OP_SCSI_CMD_RSP: + case ISCSI_OP_SCSI_DATA_IN: + task = iscsi_itt_to_ctask(conn, hdr->itt); + if (!task) + return ISCSI_ERR_BAD_ITT; + break; + case ISCSI_OP_R2T: + /* + * LLD handles R2Ts if they need to. + */ + return 0; + case ISCSI_OP_LOGOUT_RSP: + case ISCSI_OP_LOGIN_RSP: + case ISCSI_OP_TEXT_RSP: + case ISCSI_OP_SCSI_TMFUNC_RSP: + case ISCSI_OP_NOOP_IN: + task = iscsi_itt_to_task(conn, hdr->itt); + if (!task) + return ISCSI_ERR_BAD_ITT; + break; + default: + return ISCSI_ERR_BAD_OPCODE; + } + + switch(opcode) { + case ISCSI_OP_SCSI_CMD_RSP: + iscsi_scsi_cmd_rsp(conn, hdr, task, data, datalen); + break; + case ISCSI_OP_SCSI_DATA_IN: + if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { + conn->scsirsp_pdus_cnt++; + iscsi_update_cmdsn(session, + (struct iscsi_nopin*) hdr); + __iscsi_put_task(task); + } + break; + case ISCSI_OP_LOGOUT_RSP: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + if (datalen) { + rc = ISCSI_ERR_PROTO; + break; + } + conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; + goto recv_pdu; + case ISCSI_OP_LOGIN_RSP: + case ISCSI_OP_TEXT_RSP: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + /* + * login related PDU's exp_statsn is handled in + * userspace + */ + goto recv_pdu; + case ISCSI_OP_SCSI_TMFUNC_RSP: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + if (datalen) { + rc = ISCSI_ERR_PROTO; + break; + } + + iscsi_tmf_rsp(conn, hdr); + __iscsi_put_task(task); + break; + case ISCSI_OP_NOOP_IN: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) { + rc = ISCSI_ERR_PROTO; + break; + } + conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; + + if (conn->ping_task != task) + /* + * If this is not in response to one of our + * nops then it must be from userspace. + */ + goto recv_pdu; + + mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout); + __iscsi_put_task(task); + break; + default: + rc = ISCSI_ERR_BAD_OPCODE; + break; + } + +out: + return rc; +recv_pdu: + if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) + rc = ISCSI_ERR_CONN_FAILED; + __iscsi_put_task(task); return rc; } +EXPORT_SYMBOL_GPL(__iscsi_complete_pdu); int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, char *data, int datalen) @@ -784,51 +896,63 @@ int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, } EXPORT_SYMBOL_GPL(iscsi_complete_pdu); -/* verify itt (itt encoding: age+cid+itt) */ -int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr, - uint32_t *ret_itt) +int iscsi_verify_itt(struct iscsi_conn *conn, itt_t itt) { struct iscsi_session *session = conn->session; - struct iscsi_cmd_task *ctask; - uint32_t itt; + uint32_t i; - if (hdr->itt != RESERVED_ITT) { - if (((__force u32)hdr->itt & ISCSI_AGE_MASK) != - (session->age << ISCSI_AGE_SHIFT)) { - iscsi_conn_printk(KERN_ERR, conn, - "received itt %x expected session " - "age (%x)\n", (__force u32)hdr->itt, - session->age & ISCSI_AGE_MASK); - return ISCSI_ERR_BAD_ITT; - } + if (itt == RESERVED_ITT) + return 0; - itt = get_itt(hdr->itt); - } else - itt = ~0U; + if (((__force u32)itt & ISCSI_AGE_MASK) != + (session->age << ISCSI_AGE_SHIFT)) { + iscsi_conn_printk(KERN_ERR, conn, + "received itt %x expected session age (%x)\n", + (__force u32)itt, session->age); + return ISCSI_ERR_BAD_ITT; + } - if (itt < session->cmds_max) { - ctask = session->cmds[itt]; + i = get_itt(itt); + if (i >= session->cmds_max) { + iscsi_conn_printk(KERN_ERR, conn, + "received invalid itt index %u (max cmds " + "%u.\n", i, session->cmds_max); + return ISCSI_ERR_BAD_ITT; + } + return 0; +} +EXPORT_SYMBOL_GPL(iscsi_verify_itt); - if (!ctask->sc) { - iscsi_conn_printk(KERN_INFO, conn, "dropping ctask " - "with itt 0x%x\n", ctask->itt); - /* force drop */ - return ISCSI_ERR_NO_SCSI_CMD; - } +/** + * iscsi_itt_to_ctask - look up ctask by itt + * @conn: iscsi connection + * @itt: itt + * + * This should be used for cmd tasks. + * + * The session lock must be held. + */ +struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *conn, itt_t itt) +{ + struct iscsi_task *task; - if (ctask->sc->SCp.phase != session->age) { - iscsi_conn_printk(KERN_ERR, conn, - "iscsi: ctask's session age %d, " - "expected %d\n", ctask->sc->SCp.phase, - session->age); - return ISCSI_ERR_SESSION_FAILED; - } + if (iscsi_verify_itt(conn, itt)) + return NULL; + + task = iscsi_itt_to_task(conn, itt); + if (!task || !task->sc) + return NULL; + + if (task->sc->SCp.phase != conn->session->age) { + iscsi_session_printk(KERN_ERR, conn->session, + "task's session age %d, expected %d\n", + task->sc->SCp.phase, conn->session->age); + return NULL; } - *ret_itt = itt; - return 0; + return task; } -EXPORT_SYMBOL_GPL(iscsi_verify_itt); +EXPORT_SYMBOL_GPL(iscsi_itt_to_ctask); void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) { @@ -850,61 +974,6 @@ void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) } EXPORT_SYMBOL_GPL(iscsi_conn_failure); -static void iscsi_prep_mtask(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask) -{ - struct iscsi_session *session = conn->session; - struct iscsi_hdr *hdr = mtask->hdr; - struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr; - - if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) && - hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE)) - nop->exp_statsn = cpu_to_be32(conn->exp_statsn); - /* - * pre-format CmdSN for outgoing PDU. - */ - nop->cmdsn = cpu_to_be32(session->cmdsn); - if (hdr->itt != RESERVED_ITT) { - hdr->itt = build_itt(mtask->itt, session->age); - /* - * TODO: We always use immediate, so we never hit this. - * If we start to send tmfs or nops as non-immediate then - * we should start checking the cmdsn numbers for mgmt tasks. - */ - if (conn->c_stage == ISCSI_CONN_STARTED && - !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { - session->queued_cmdsn++; - session->cmdsn++; - } - } - - if (session->tt->init_mgmt_task) - session->tt->init_mgmt_task(conn, mtask); - - debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n", - hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt, - mtask->data_count); -} - -static int iscsi_xmit_mtask(struct iscsi_conn *conn) -{ - struct iscsi_hdr *hdr = conn->mtask->hdr; - int rc; - - if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) - conn->session->state = ISCSI_STATE_LOGGING_OUT; - spin_unlock_bh(&conn->session->lock); - - rc = conn->session->tt->xmit_mgmt_task(conn, conn->mtask); - spin_lock_bh(&conn->session->lock); - if (rc) - return rc; - - /* done with this in-progress mtask */ - conn->mtask = NULL; - return 0; -} - static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn) { struct iscsi_session *session = conn->session; @@ -922,37 +991,38 @@ static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn) return 0; } -static int iscsi_xmit_ctask(struct iscsi_conn *conn) +static int iscsi_xmit_task(struct iscsi_conn *conn) { - struct iscsi_cmd_task *ctask = conn->ctask; + struct iscsi_task *task = conn->task; int rc; - __iscsi_get_ctask(ctask); + __iscsi_get_task(task); spin_unlock_bh(&conn->session->lock); - rc = conn->session->tt->xmit_cmd_task(conn, ctask); + rc = conn->session->tt->xmit_task(task); spin_lock_bh(&conn->session->lock); - __iscsi_put_ctask(ctask); + __iscsi_put_task(task); if (!rc) - /* done with this ctask */ - conn->ctask = NULL; + /* done with this task */ + conn->task = NULL; return rc; } /** - * iscsi_requeue_ctask - requeue ctask to run from session workqueue - * @ctask: ctask to requeue + * iscsi_requeue_task - requeue task to run from session workqueue + * @task: task to requeue * - * LLDs that need to run a ctask from the session workqueue should call - * this. The session lock must be held. + * LLDs that need to run a task from the session workqueue should call + * this. The session lock must be held. This should only be called + * by software drivers. */ -void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask) +void iscsi_requeue_task(struct iscsi_task *task) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; - list_move_tail(&ctask->running, &conn->requeue); + list_move_tail(&task->running, &conn->requeue); scsi_queue_work(conn->session->host, &conn->xmitwork); } -EXPORT_SYMBOL_GPL(iscsi_requeue_ctask); +EXPORT_SYMBOL_GPL(iscsi_requeue_task); /** * iscsi_data_xmit - xmit any command into the scheduled connection @@ -974,14 +1044,8 @@ static int iscsi_data_xmit(struct iscsi_conn *conn) return -ENODATA; } - if (conn->ctask) { - rc = iscsi_xmit_ctask(conn); - if (rc) - goto again; - } - - if (conn->mtask) { - rc = iscsi_xmit_mtask(conn); + if (conn->task) { + rc = iscsi_xmit_task(conn); if (rc) goto again; } @@ -993,17 +1057,14 @@ static int iscsi_data_xmit(struct iscsi_conn *conn) */ check_mgmt: while (!list_empty(&conn->mgmtqueue)) { - conn->mtask = list_entry(conn->mgmtqueue.next, - struct iscsi_mgmt_task, running); - if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { - iscsi_free_mgmt_task(conn, conn->mtask); - conn->mtask = NULL; + conn->task = list_entry(conn->mgmtqueue.next, + struct iscsi_task, running); + if (iscsi_prep_mgmt_task(conn, conn->task)) { + __iscsi_put_task(conn->task); + conn->task = NULL; continue; } - - iscsi_prep_mtask(conn, conn->mtask); - list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list); - rc = iscsi_xmit_mtask(conn); + rc = iscsi_xmit_task(conn); if (rc) goto again; } @@ -1013,24 +1074,21 @@ check_mgmt: if (conn->tmf_state == TMF_QUEUED) break; - conn->ctask = list_entry(conn->xmitqueue.next, - struct iscsi_cmd_task, running); + conn->task = list_entry(conn->xmitqueue.next, + struct iscsi_task, running); if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { - fail_command(conn, conn->ctask, DID_IMM_RETRY << 16); + fail_command(conn, conn->task, DID_IMM_RETRY << 16); continue; } - if (iscsi_prep_scsi_cmd_pdu(conn->ctask)) { - fail_command(conn, conn->ctask, DID_ABORT << 16); + if (iscsi_prep_scsi_cmd_pdu(conn->task)) { + fail_command(conn, conn->task, DID_ABORT << 16); continue; } - - conn->ctask->state = ISCSI_TASK_RUNNING; - list_move_tail(conn->xmitqueue.next, &conn->run_list); - rc = iscsi_xmit_ctask(conn); + rc = iscsi_xmit_task(conn); if (rc) goto again; /* - * we could continuously get new ctask requests so + * we could continuously get new task requests so * we need to check the mgmt queue for nops that need to * be sent to aviod starvation */ @@ -1048,11 +1106,11 @@ check_mgmt: if (conn->session->state == ISCSI_STATE_LOGGING_OUT) break; - conn->ctask = list_entry(conn->requeue.next, - struct iscsi_cmd_task, running); - conn->ctask->state = ISCSI_TASK_RUNNING; + conn->task = list_entry(conn->requeue.next, + struct iscsi_task, running); + conn->task->state = ISCSI_TASK_RUNNING; list_move_tail(conn->requeue.next, &conn->run_list); - rc = iscsi_xmit_ctask(conn); + rc = iscsi_xmit_task(conn); if (rc) goto again; if (!list_empty(&conn->mgmtqueue)) @@ -1096,11 +1154,12 @@ enum { int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) { + struct iscsi_cls_session *cls_session; struct Scsi_Host *host; int reason = 0; struct iscsi_session *session; struct iscsi_conn *conn; - struct iscsi_cmd_task *ctask = NULL; + struct iscsi_task *task = NULL; sc->scsi_done = done; sc->result = 0; @@ -1109,10 +1168,11 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) host = sc->device->host; spin_unlock(host->host_lock); - session = iscsi_hostdata(host->hostdata); + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; spin_lock(&session->lock); - reason = iscsi_session_chkready(session_to_cls(session)); + reason = iscsi_session_chkready(cls_session); if (reason) { sc->result = reason; goto fault; @@ -1167,26 +1227,39 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) goto reject; } - if (!__kfifo_get(session->cmdpool.queue, (void*)&ctask, + if (!__kfifo_get(session->cmdpool.queue, (void*)&task, sizeof(void*))) { reason = FAILURE_OOM; goto reject; } - session->queued_cmdsn++; - sc->SCp.phase = session->age; - sc->SCp.ptr = (char *)ctask; - - atomic_set(&ctask->refcount, 1); - ctask->state = ISCSI_TASK_PENDING; - ctask->conn = conn; - ctask->sc = sc; - INIT_LIST_HEAD(&ctask->running); + sc->SCp.ptr = (char *)task; + + atomic_set(&task->refcount, 1); + task->state = ISCSI_TASK_PENDING; + task->conn = conn; + task->sc = sc; + INIT_LIST_HEAD(&task->running); + list_add_tail(&task->running, &conn->xmitqueue); + + if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) { + if (iscsi_prep_scsi_cmd_pdu(task)) { + sc->result = DID_ABORT << 16; + sc->scsi_done = NULL; + iscsi_complete_command(task); + goto fault; + } + if (session->tt->xmit_task(task)) { + sc->scsi_done = NULL; + iscsi_complete_command(task); + reason = FAILURE_SESSION_NOT_READY; + goto reject; + } + } else + scsi_queue_work(session->host, &conn->xmitwork); - list_add_tail(&ctask->running, &conn->xmitqueue); + session->queued_cmdsn++; spin_unlock(&session->lock); - - scsi_queue_work(host, &conn->xmitwork); spin_lock(host->host_lock); return 0; @@ -1205,7 +1278,7 @@ fault: scsi_out(sc)->resid = scsi_out(sc)->length; scsi_in(sc)->resid = scsi_in(sc)->length; } - sc->scsi_done(sc); + done(sc); spin_lock(host->host_lock); return 0; } @@ -1222,7 +1295,7 @@ EXPORT_SYMBOL_GPL(iscsi_change_queue_depth); void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session) { - struct iscsi_session *session = class_to_transport_session(cls_session); + struct iscsi_session *session = cls_session->dd_data; spin_lock_bh(&session->lock); if (session->state != ISCSI_STATE_LOGGED_IN) { @@ -1236,9 +1309,13 @@ EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout); int iscsi_eh_host_reset(struct scsi_cmnd *sc) { - struct Scsi_Host *host = sc->device->host; - struct iscsi_session *session = iscsi_hostdata(host->hostdata); - struct iscsi_conn *conn = session->leadconn; + struct iscsi_cls_session *cls_session; + struct iscsi_session *session; + struct iscsi_conn *conn; + + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; + conn = session->leadconn; mutex_lock(&session->eh_mutex); spin_lock_bh(&session->lock); @@ -1300,11 +1377,11 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, int timeout) { struct iscsi_session *session = conn->session; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; - mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr, + task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); - if (!mtask) { + if (!task) { spin_unlock_bh(&session->lock); iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); spin_lock_bh(&session->lock); @@ -1320,7 +1397,6 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, spin_unlock_bh(&session->lock); mutex_unlock(&session->eh_mutex); - scsi_queue_work(session->host, &conn->xmitwork); /* * block eh thread until: @@ -1339,7 +1415,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, mutex_lock(&session->eh_mutex); spin_lock_bh(&session->lock); - /* if the session drops it will clean up the mtask */ + /* if the session drops it will clean up the task */ if (age != session->age || session->state != ISCSI_STATE_LOGGED_IN) return -ENOTCONN; @@ -1353,48 +1429,51 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, static void fail_all_commands(struct iscsi_conn *conn, unsigned lun, int error) { - struct iscsi_cmd_task *ctask, *tmp; + struct iscsi_task *task, *tmp; - if (conn->ctask && (conn->ctask->sc->device->lun == lun || lun == -1)) - conn->ctask = NULL; + if (conn->task && (conn->task->sc->device->lun == lun || lun == -1)) + conn->task = NULL; /* flush pending */ - list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) { - if (lun == ctask->sc->device->lun || lun == -1) { + list_for_each_entry_safe(task, tmp, &conn->xmitqueue, running) { + if (lun == task->sc->device->lun || lun == -1) { debug_scsi("failing pending sc %p itt 0x%x\n", - ctask->sc, ctask->itt); - fail_command(conn, ctask, error << 16); + task->sc, task->itt); + fail_command(conn, task, error << 16); } } - list_for_each_entry_safe(ctask, tmp, &conn->requeue, running) { - if (lun == ctask->sc->device->lun || lun == -1) { + list_for_each_entry_safe(task, tmp, &conn->requeue, running) { + if (lun == task->sc->device->lun || lun == -1) { debug_scsi("failing requeued sc %p itt 0x%x\n", - ctask->sc, ctask->itt); - fail_command(conn, ctask, error << 16); + task->sc, task->itt); + fail_command(conn, task, error << 16); } } /* fail all other running */ - list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) { - if (lun == ctask->sc->device->lun || lun == -1) { + list_for_each_entry_safe(task, tmp, &conn->run_list, running) { + if (lun == task->sc->device->lun || lun == -1) { debug_scsi("failing in progress sc %p itt 0x%x\n", - ctask->sc, ctask->itt); - fail_command(conn, ctask, DID_BUS_BUSY << 16); + task->sc, task->itt); + fail_command(conn, task, DID_BUS_BUSY << 16); } } } -static void iscsi_suspend_tx(struct iscsi_conn *conn) +void iscsi_suspend_tx(struct iscsi_conn *conn) { set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); - scsi_flush_work(conn->session->host); + if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD)) + scsi_flush_work(conn->session->host); } +EXPORT_SYMBOL_GPL(iscsi_suspend_tx); static void iscsi_start_tx(struct iscsi_conn *conn) { clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); - scsi_queue_work(conn->session->host, &conn->xmitwork); + if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD)) + scsi_queue_work(conn->session->host, &conn->xmitwork); } static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) @@ -1405,7 +1484,7 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) enum scsi_eh_timer_return rc = EH_NOT_HANDLED; cls_session = starget_to_session(scsi_target(scmd->device)); - session = class_to_transport_session(cls_session); + session = cls_session->dd_data; debug_scsi("scsi cmd %p timedout\n", scmd); @@ -1443,7 +1522,7 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) jiffies)) rc = EH_RESET_TIMER; /* if in the middle of checking the transport then give us more time */ - if (conn->ping_mtask) + if (conn->ping_task) rc = EH_RESET_TIMER; done: spin_unlock(&session->lock); @@ -1467,7 +1546,7 @@ static void iscsi_check_transport_timeouts(unsigned long data) recv_timeout *= HZ; last_recv = conn->last_recv; - if (conn->ping_mtask && + if (conn->ping_task && time_before_eq(conn->last_ping + (conn->ping_timeout * HZ), jiffies)) { iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs " @@ -1493,27 +1572,30 @@ done: spin_unlock(&session->lock); } -static void iscsi_prep_abort_task_pdu(struct iscsi_cmd_task *ctask, +static void iscsi_prep_abort_task_pdu(struct iscsi_task *task, struct iscsi_tm *hdr) { memset(hdr, 0, sizeof(*hdr)); hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK; hdr->flags |= ISCSI_FLAG_CMD_FINAL; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); - hdr->rtt = ctask->hdr->itt; - hdr->refcmdsn = ctask->hdr->cmdsn; + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); + hdr->rtt = task->hdr->itt; + hdr->refcmdsn = task->hdr->cmdsn; } int iscsi_eh_abort(struct scsi_cmnd *sc) { - struct Scsi_Host *host = sc->device->host; - struct iscsi_session *session = iscsi_hostdata(host->hostdata); + struct iscsi_cls_session *cls_session; + struct iscsi_session *session; struct iscsi_conn *conn; - struct iscsi_cmd_task *ctask; + struct iscsi_task *task; struct iscsi_tm *hdr; int rc, age; + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; + mutex_lock(&session->eh_mutex); spin_lock_bh(&session->lock); /* @@ -1542,17 +1624,17 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) conn->eh_abort_cnt++; age = session->age; - ctask = (struct iscsi_cmd_task *)sc->SCp.ptr; - debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt); + task = (struct iscsi_task *)sc->SCp.ptr; + debug_scsi("aborting [sc %p itt 0x%x]\n", sc, task->itt); - /* ctask completed before time out */ - if (!ctask->sc) { + /* task completed before time out */ + if (!task->sc) { debug_scsi("sc completed while abort in progress\n"); goto success; } - if (ctask->state == ISCSI_TASK_PENDING) { - fail_command(conn, ctask, DID_ABORT << 16); + if (task->state == ISCSI_TASK_PENDING) { + fail_command(conn, task, DID_ABORT << 16); goto success; } @@ -1562,7 +1644,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) conn->tmf_state = TMF_QUEUED; hdr = &conn->tmhdr; - iscsi_prep_abort_task_pdu(ctask, hdr); + iscsi_prep_abort_task_pdu(task, hdr); if (iscsi_exec_task_mgmt_fn(conn, hdr, age, session->abort_timeout)) { rc = FAILED; @@ -1572,16 +1654,20 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) switch (conn->tmf_state) { case TMF_SUCCESS: spin_unlock_bh(&session->lock); + /* + * stop tx side incase the target had sent a abort rsp but + * the initiator was still writing out data. + */ iscsi_suspend_tx(conn); /* - * clean up task if aborted. grab the recv lock as a writer + * we do not stop the recv side because targets have been + * good and have never sent us a successful tmf response + * then sent more data for the cmd. */ - write_lock_bh(conn->recv_lock); spin_lock(&session->lock); - fail_command(conn, ctask, DID_ABORT << 16); + fail_command(conn, task, DID_ABORT << 16); conn->tmf_state = TMF_INITIAL; spin_unlock(&session->lock); - write_unlock_bh(conn->recv_lock); iscsi_start_tx(conn); goto success_unlocked; case TMF_TIMEDOUT: @@ -1591,7 +1677,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) case TMF_NOT_FOUND: if (!sc->SCp.ptr) { conn->tmf_state = TMF_INITIAL; - /* ctask completed before tmf abort response */ + /* task completed before tmf abort response */ debug_scsi("sc completed while abort in progress\n"); goto success; } @@ -1604,7 +1690,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) success: spin_unlock_bh(&session->lock); success_unlocked: - debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, ctask->itt); + debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, task->itt); mutex_unlock(&session->eh_mutex); return SUCCESS; @@ -1612,7 +1698,7 @@ failed: spin_unlock_bh(&session->lock); failed_unlocked: debug_scsi("abort failed [sc %p itt 0x%x]\n", sc, - ctask ? ctask->itt : 0); + task ? task->itt : 0); mutex_unlock(&session->eh_mutex); return FAILED; } @@ -1630,12 +1716,15 @@ static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) int iscsi_eh_device_reset(struct scsi_cmnd *sc) { - struct Scsi_Host *host = sc->device->host; - struct iscsi_session *session = iscsi_hostdata(host->hostdata); + struct iscsi_cls_session *cls_session; + struct iscsi_session *session; struct iscsi_conn *conn; struct iscsi_tm *hdr; int rc = FAILED; + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; + debug_scsi("LU Reset [sc %p lun %u]\n", sc, sc->device->lun); mutex_lock(&session->eh_mutex); @@ -1678,13 +1767,11 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc) spin_unlock_bh(&session->lock); iscsi_suspend_tx(conn); - /* need to grab the recv lock then session lock */ - write_lock_bh(conn->recv_lock); + spin_lock(&session->lock); fail_all_commands(conn, sc->device->lun, DID_ERROR); conn->tmf_state = TMF_INITIAL; spin_unlock(&session->lock); - write_unlock_bh(conn->recv_lock); iscsi_start_tx(conn); goto done; @@ -1760,177 +1847,203 @@ void iscsi_pool_free(struct iscsi_pool *q) } EXPORT_SYMBOL_GPL(iscsi_pool_free); -/* - * iSCSI Session's hostdata organization: +/** + * iscsi_host_add - add host to system + * @shost: scsi host + * @pdev: parent device + * + * This should be called by partial offload and software iscsi drivers + * to add a host to the system. + */ +int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev) +{ + if (!shost->can_queue) + shost->can_queue = ISCSI_DEF_XMIT_CMDS_MAX; + + return scsi_add_host(shost, pdev); +} +EXPORT_SYMBOL_GPL(iscsi_host_add); + +/** + * iscsi_host_alloc - allocate a host and driver data + * @sht: scsi host template + * @dd_data_size: driver host data size + * @qdepth: default device queue depth + * + * This should be called by partial offload and software iscsi drivers. + * To access the driver specific memory use the iscsi_host_priv() macro. + */ +struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, + int dd_data_size, uint16_t qdepth) +{ + struct Scsi_Host *shost; + + shost = scsi_host_alloc(sht, sizeof(struct iscsi_host) + dd_data_size); + if (!shost) + return NULL; + shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out; + + if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) { + if (qdepth != 0) + printk(KERN_ERR "iscsi: invalid queue depth of %d. " + "Queue depth must be between 1 and %d.\n", + qdepth, ISCSI_MAX_CMD_PER_LUN); + qdepth = ISCSI_DEF_CMD_PER_LUN; + } + shost->cmd_per_lun = qdepth; + return shost; +} +EXPORT_SYMBOL_GPL(iscsi_host_alloc); + +/** + * iscsi_host_remove - remove host and sessions + * @shost: scsi host * - * *------------------* <== hostdata_session(host->hostdata) - * | ptr to class sess| - * |------------------| <== iscsi_hostdata(host->hostdata) - * | iscsi_session | - * *------------------* + * This will also remove any sessions attached to the host, but if userspace + * is managing the session at the same time this will break. TODO: add + * refcounting to the netlink iscsi interface so a rmmod or host hot unplug + * does not remove the memory from under us. */ +void iscsi_host_remove(struct Scsi_Host *shost) +{ + iscsi_host_for_each_session(shost, iscsi_session_teardown); + scsi_remove_host(shost); +} +EXPORT_SYMBOL_GPL(iscsi_host_remove); -#define hostdata_privsize(_sz) (sizeof(unsigned long) + _sz + \ - _sz % sizeof(unsigned long)) +void iscsi_host_free(struct Scsi_Host *shost) +{ + struct iscsi_host *ihost = shost_priv(shost); -#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata)) + kfree(ihost->netdev); + kfree(ihost->hwaddress); + kfree(ihost->initiatorname); + scsi_host_put(shost); +} +EXPORT_SYMBOL_GPL(iscsi_host_free); /** * iscsi_session_setup - create iscsi cls session and host and session - * @scsit: scsi transport template * @iscsit: iscsi transport template - * @cmds_max: scsi host can queue - * @qdepth: scsi host cmds per lun - * @cmd_task_size: LLD ctask private data size - * @mgmt_task_size: LLD mtask private data size + * @shost: scsi host + * @cmds_max: session can queue + * @cmd_task_size: LLD task private data size * @initial_cmdsn: initial CmdSN - * @hostno: host no allocated * * This can be used by software iscsi_transports that allocate * a session per scsi host. - **/ + * + * Callers should set cmds_max to the largest total numer (mgmt + scsi) of + * tasks they support. The iscsi layer reserves ISCSI_MGMT_CMDS_MAX tasks + * for nop handling and login/logout requests. + */ struct iscsi_cls_session * -iscsi_session_setup(struct iscsi_transport *iscsit, - struct scsi_transport_template *scsit, - uint16_t cmds_max, uint16_t qdepth, - int cmd_task_size, int mgmt_task_size, - uint32_t initial_cmdsn, uint32_t *hostno) +iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost, + uint16_t cmds_max, int cmd_task_size, + uint32_t initial_cmdsn, unsigned int id) { - struct Scsi_Host *shost; struct iscsi_session *session; struct iscsi_cls_session *cls_session; - int cmd_i; + int cmd_i, scsi_cmds, total_cmds = cmds_max; - if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) { - if (qdepth != 0) - printk(KERN_ERR "iscsi: invalid queue depth of %d. " - "Queue depth must be between 1 and %d.\n", - qdepth, ISCSI_MAX_CMD_PER_LUN); - qdepth = ISCSI_DEF_CMD_PER_LUN; + if (!total_cmds) + total_cmds = ISCSI_DEF_XMIT_CMDS_MAX; + /* + * The iscsi layer needs some tasks for nop handling and tmfs, + * so the cmds_max must at least be greater than ISCSI_MGMT_CMDS_MAX + * + 1 command for scsi IO. + */ + if (total_cmds < ISCSI_TOTAL_CMDS_MIN) { + printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " + "must be a power of two that is at least %d.\n", + total_cmds, ISCSI_TOTAL_CMDS_MIN); + return NULL; } - if (!is_power_of_2(cmds_max) || cmds_max >= ISCSI_MGMT_ITT_OFFSET || - cmds_max < 2) { - if (cmds_max != 0) - printk(KERN_ERR "iscsi: invalid can_queue of %d. " - "can_queue must be a power of 2 and between " - "2 and %d - setting to %d.\n", cmds_max, - ISCSI_MGMT_ITT_OFFSET, ISCSI_DEF_XMIT_CMDS_MAX); - cmds_max = ISCSI_DEF_XMIT_CMDS_MAX; + if (total_cmds > ISCSI_TOTAL_CMDS_MAX) { + printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " + "must be a power of 2 less than or equal to %d.\n", + cmds_max, ISCSI_TOTAL_CMDS_MAX); + total_cmds = ISCSI_TOTAL_CMDS_MAX; } - shost = scsi_host_alloc(iscsit->host_template, - hostdata_privsize(sizeof(*session))); - if (!shost) - return NULL; - - /* the iscsi layer takes one task for reserve */ - shost->can_queue = cmds_max - 1; - shost->cmd_per_lun = qdepth; - shost->max_id = 1; - shost->max_channel = 0; - shost->max_lun = iscsit->max_lun; - shost->max_cmd_len = iscsit->max_cmd_len; - shost->transportt = scsit; - shost->transportt->create_work_queue = 1; - shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out; - *hostno = shost->host_no; + if (!is_power_of_2(total_cmds)) { + printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " + "must be a power of 2.\n", total_cmds); + total_cmds = rounddown_pow_of_two(total_cmds); + if (total_cmds < ISCSI_TOTAL_CMDS_MIN) + return NULL; + printk(KERN_INFO "iscsi: Rounding can_queue to %d.\n", + total_cmds); + } + scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX; - session = iscsi_hostdata(shost->hostdata); - memset(session, 0, sizeof(struct iscsi_session)); + cls_session = iscsi_alloc_session(shost, iscsit, + sizeof(struct iscsi_session)); + if (!cls_session) + return NULL; + session = cls_session->dd_data; + session->cls_session = cls_session; session->host = shost; session->state = ISCSI_STATE_FREE; session->fast_abort = 1; session->lu_reset_timeout = 15; session->abort_timeout = 10; - session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX; - session->cmds_max = cmds_max; + session->scsi_cmds_max = scsi_cmds; + session->cmds_max = total_cmds; session->queued_cmdsn = session->cmdsn = initial_cmdsn; session->exp_cmdsn = initial_cmdsn + 1; session->max_cmdsn = initial_cmdsn + 1; session->max_r2t = 1; session->tt = iscsit; mutex_init(&session->eh_mutex); + spin_lock_init(&session->lock); /* initialize SCSI PDU commands pool */ if (iscsi_pool_init(&session->cmdpool, session->cmds_max, (void***)&session->cmds, - cmd_task_size + sizeof(struct iscsi_cmd_task))) + cmd_task_size + sizeof(struct iscsi_task))) goto cmdpool_alloc_fail; /* pre-format cmds pool with ITT */ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { - struct iscsi_cmd_task *ctask = session->cmds[cmd_i]; + struct iscsi_task *task = session->cmds[cmd_i]; if (cmd_task_size) - ctask->dd_data = &ctask[1]; - ctask->itt = cmd_i; - INIT_LIST_HEAD(&ctask->running); - } - - spin_lock_init(&session->lock); - - /* initialize immediate command pool */ - if (iscsi_pool_init(&session->mgmtpool, session->mgmtpool_max, - (void***)&session->mgmt_cmds, - mgmt_task_size + sizeof(struct iscsi_mgmt_task))) - goto mgmtpool_alloc_fail; - - - /* pre-format immediate cmds pool with ITT */ - for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) { - struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i]; - - if (mgmt_task_size) - mtask->dd_data = &mtask[1]; - mtask->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i; - INIT_LIST_HEAD(&mtask->running); + task->dd_data = &task[1]; + task->itt = cmd_i; + INIT_LIST_HEAD(&task->running); } - if (scsi_add_host(shost, NULL)) - goto add_host_fail; - if (!try_module_get(iscsit->owner)) - goto cls_session_fail; - - cls_session = iscsi_create_session(shost, iscsit, 0); - if (!cls_session) - goto module_put; - *(unsigned long*)shost->hostdata = (unsigned long)cls_session; + goto module_get_fail; + if (iscsi_add_session(cls_session, id)) + goto cls_session_fail; return cls_session; -module_put: - module_put(iscsit->owner); cls_session_fail: - scsi_remove_host(shost); -add_host_fail: - iscsi_pool_free(&session->mgmtpool); -mgmtpool_alloc_fail: + module_put(iscsit->owner); +module_get_fail: iscsi_pool_free(&session->cmdpool); cmdpool_alloc_fail: - scsi_host_put(shost); + iscsi_free_session(cls_session); return NULL; } EXPORT_SYMBOL_GPL(iscsi_session_setup); /** * iscsi_session_teardown - destroy session, host, and cls_session - * shost: scsi host + * @cls_session: iscsi session * - * This can be used by software iscsi_transports that allocate - * a session per scsi host. - **/ + * The driver must have called iscsi_remove_session before + * calling this. + */ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) { - struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_session *session = cls_session->dd_data; struct module *owner = cls_session->transport->owner; - iscsi_remove_session(cls_session); - scsi_remove_host(shost); - - iscsi_pool_free(&session->mgmtpool); iscsi_pool_free(&session->cmdpool); kfree(session->password); @@ -1938,12 +2051,10 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) kfree(session->username); kfree(session->username_in); kfree(session->targetname); - kfree(session->netdev); - kfree(session->hwaddress); kfree(session->initiatorname); + kfree(session->ifacename); - iscsi_free_session(cls_session); - scsi_host_put(shost); + iscsi_destroy_session(cls_session); module_put(owner); } EXPORT_SYMBOL_GPL(iscsi_session_teardown); @@ -1951,22 +2062,26 @@ EXPORT_SYMBOL_GPL(iscsi_session_teardown); /** * iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn * @cls_session: iscsi_cls_session + * @dd_size: private driver data size * @conn_idx: cid - **/ + */ struct iscsi_cls_conn * -iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx) +iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, + uint32_t conn_idx) { - struct iscsi_session *session = class_to_transport_session(cls_session); + struct iscsi_session *session = cls_session->dd_data; struct iscsi_conn *conn; struct iscsi_cls_conn *cls_conn; char *data; - cls_conn = iscsi_create_conn(cls_session, conn_idx); + cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size, + conn_idx); if (!cls_conn) return NULL; conn = cls_conn->dd_data; - memset(conn, 0, sizeof(*conn)); + memset(conn, 0, sizeof(*conn) + dd_size); + conn->dd_data = cls_conn->dd_data + sizeof(*conn); conn->session = session; conn->cls_conn = cls_conn; conn->c_stage = ISCSI_CONN_INITIAL_STAGE; @@ -1985,30 +2100,30 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx) INIT_LIST_HEAD(&conn->requeue); INIT_WORK(&conn->xmitwork, iscsi_xmitworker); - /* allocate login_mtask used for the login/text sequences */ + /* allocate login_task used for the login/text sequences */ spin_lock_bh(&session->lock); - if (!__kfifo_get(session->mgmtpool.queue, - (void*)&conn->login_mtask, + if (!__kfifo_get(session->cmdpool.queue, + (void*)&conn->login_task, sizeof(void*))) { spin_unlock_bh(&session->lock); - goto login_mtask_alloc_fail; + goto login_task_alloc_fail; } spin_unlock_bh(&session->lock); data = kmalloc(ISCSI_DEF_MAX_RECV_SEG_LEN, GFP_KERNEL); if (!data) - goto login_mtask_data_alloc_fail; - conn->login_mtask->data = conn->data = data; + goto login_task_data_alloc_fail; + conn->login_task->data = conn->data = data; init_timer(&conn->tmf_timer); init_waitqueue_head(&conn->ehwait); return cls_conn; -login_mtask_data_alloc_fail: - __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask, +login_task_data_alloc_fail: + __kfifo_put(session->cmdpool.queue, (void*)&conn->login_task, sizeof(void*)); -login_mtask_alloc_fail: +login_task_alloc_fail: iscsi_destroy_conn(cls_conn); return NULL; } @@ -2068,7 +2183,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn) spin_lock_bh(&session->lock); kfree(conn->data); kfree(conn->persistent_address); - __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask, + __kfifo_put(session->cmdpool.queue, (void*)&conn->login_task, sizeof(void*)); if (session->leadconn == conn) session->leadconn = NULL; @@ -2140,7 +2255,7 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn) } spin_unlock_bh(&session->lock); - iscsi_unblock_session(session_to_cls(session)); + iscsi_unblock_session(session->cls_session); wake_up(&conn->ehwait); return 0; } @@ -2149,21 +2264,23 @@ EXPORT_SYMBOL_GPL(iscsi_conn_start); static void flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn) { - struct iscsi_mgmt_task *mtask, *tmp; + struct iscsi_task *task, *tmp; /* handle pending */ - list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) { - debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt); - iscsi_free_mgmt_task(conn, mtask); + list_for_each_entry_safe(task, tmp, &conn->mgmtqueue, running) { + debug_scsi("flushing pending mgmt task itt 0x%x\n", task->itt); + /* release ref from prep task */ + __iscsi_put_task(task); } /* handle running */ - list_for_each_entry_safe(mtask, tmp, &conn->mgmt_run_list, running) { - debug_scsi("flushing running mgmt task itt 0x%x\n", mtask->itt); - iscsi_free_mgmt_task(conn, mtask); + list_for_each_entry_safe(task, tmp, &conn->mgmt_run_list, running) { + debug_scsi("flushing running mgmt task itt 0x%x\n", task->itt); + /* release ref from prep task */ + __iscsi_put_task(task); } - conn->mtask = NULL; + conn->task = NULL; } static void iscsi_start_session_recovery(struct iscsi_session *session, @@ -2182,17 +2299,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session, } /* - * The LLD either freed/unset the lock on us, or userspace called - * stop but did not create a proper connection (connection was never - * bound or it was unbound then stop was called). - */ - if (!conn->recv_lock) { - spin_unlock_bh(&session->lock); - mutex_unlock(&session->eh_mutex); - return; - } - - /* * When this is called for the in_login state, we only want to clean * up the login task and connection. We do not need to block and set * the recovery state again @@ -2208,11 +2314,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session, spin_unlock_bh(&session->lock); iscsi_suspend_tx(conn); - - write_lock_bh(conn->recv_lock); - set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); - write_unlock_bh(conn->recv_lock); - /* * for connection level recovery we should not calculate * header digest. conn->hdr_size used for optimization @@ -2225,7 +2326,7 @@ static void iscsi_start_session_recovery(struct iscsi_session *session, if (session->state == ISCSI_STATE_IN_RECOVERY && old_stop_stage != STOP_CONN_RECOVER) { debug_scsi("blocking session\n"); - iscsi_block_session(session_to_cls(session)); + iscsi_block_session(session->cls_session); } } @@ -2260,7 +2361,7 @@ EXPORT_SYMBOL_GPL(iscsi_conn_stop); int iscsi_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_cls_conn *cls_conn, int is_leading) { - struct iscsi_session *session = class_to_transport_session(cls_session); + struct iscsi_session *session = cls_session->dd_data; struct iscsi_conn *conn = cls_conn->dd_data; spin_lock_bh(&session->lock); @@ -2399,6 +2500,14 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn, if (!conn->persistent_address) return -ENOMEM; break; + case ISCSI_PARAM_IFACE_NAME: + if (!session->ifacename) + session->ifacename = kstrdup(buf, GFP_KERNEL); + break; + case ISCSI_PARAM_INITIATOR_NAME: + if (!session->initiatorname) + session->initiatorname = kstrdup(buf, GFP_KERNEL); + break; default: return -ENOSYS; } @@ -2410,8 +2519,7 @@ EXPORT_SYMBOL_GPL(iscsi_set_param); int iscsi_session_get_param(struct iscsi_cls_session *cls_session, enum iscsi_param param, char *buf) { - struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_session *session = cls_session->dd_data; int len; switch(param) { @@ -2466,6 +2574,15 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session, case ISCSI_PARAM_PASSWORD_IN: len = sprintf(buf, "%s\n", session->password_in); break; + case ISCSI_PARAM_IFACE_NAME: + len = sprintf(buf, "%s\n", session->ifacename); + break; + case ISCSI_PARAM_INITIATOR_NAME: + if (!session->initiatorname) + len = sprintf(buf, "%s\n", "unknown"); + else + len = sprintf(buf, "%s\n", session->initiatorname); + break; default: return -ENOSYS; } @@ -2525,29 +2642,35 @@ EXPORT_SYMBOL_GPL(iscsi_conn_get_param); int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, char *buf) { - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_host *ihost = shost_priv(shost); int len; switch (param) { case ISCSI_HOST_PARAM_NETDEV_NAME: - if (!session->netdev) + if (!ihost->netdev) len = sprintf(buf, "%s\n", "default"); else - len = sprintf(buf, "%s\n", session->netdev); + len = sprintf(buf, "%s\n", ihost->netdev); break; case ISCSI_HOST_PARAM_HWADDRESS: - if (!session->hwaddress) + if (!ihost->hwaddress) len = sprintf(buf, "%s\n", "default"); else - len = sprintf(buf, "%s\n", session->hwaddress); + len = sprintf(buf, "%s\n", ihost->hwaddress); break; case ISCSI_HOST_PARAM_INITIATOR_NAME: - if (!session->initiatorname) + if (!ihost->initiatorname) len = sprintf(buf, "%s\n", "unknown"); else - len = sprintf(buf, "%s\n", session->initiatorname); + len = sprintf(buf, "%s\n", ihost->initiatorname); + break; + case ISCSI_HOST_PARAM_IPADDRESS: + if (!strlen(ihost->local_address)) + len = sprintf(buf, "%s\n", "unknown"); + else + len = sprintf(buf, "%s\n", + ihost->local_address); break; - default: return -ENOSYS; } @@ -2559,20 +2682,20 @@ EXPORT_SYMBOL_GPL(iscsi_host_get_param); int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param, char *buf, int buflen) { - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_host *ihost = shost_priv(shost); switch (param) { case ISCSI_HOST_PARAM_NETDEV_NAME: - if (!session->netdev) - session->netdev = kstrdup(buf, GFP_KERNEL); + if (!ihost->netdev) + ihost->netdev = kstrdup(buf, GFP_KERNEL); break; case ISCSI_HOST_PARAM_HWADDRESS: - if (!session->hwaddress) - session->hwaddress = kstrdup(buf, GFP_KERNEL); + if (!ihost->hwaddress) + ihost->hwaddress = kstrdup(buf, GFP_KERNEL); break; case ISCSI_HOST_PARAM_INITIATOR_NAME: - if (!session->initiatorname) - session->initiatorname = kstrdup(buf, GFP_KERNEL); + if (!ihost->initiatorname) + ihost->initiatorname = kstrdup(buf, GFP_KERNEL); break; default: return -ENOSYS; diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index ec0b0f6..e0e018d 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -33,6 +33,7 @@ struct lpfc_sli2_slim; #define LPFC_MAX_SG_SEG_CNT 256 /* sg element count per scsi cmnd */ #define LPFC_IOCB_LIST_CNT 2250 /* list of IOCBs for fast-path usage. */ #define LPFC_Q_RAMP_UP_INTERVAL 120 /* lun q_depth ramp up interval */ +#define LPFC_VNAME_LEN 100 /* vport symbolic name length */ /* * Following time intervals are used of adjusting SCSI device @@ -59,6 +60,9 @@ struct lpfc_sli2_slim; #define MAX_HBAEVT 32 +/* lpfc wait event data ready flag */ +#define LPFC_DATA_READY (1<<0) + enum lpfc_polling_flags { ENABLE_FCP_RING_POLLING = 0x1, DISABLE_FCP_RING_INT = 0x2 @@ -425,9 +429,6 @@ struct lpfc_hba { uint16_t pci_cfg_value; - uint8_t work_found; -#define LPFC_MAX_WORKER_ITERATION 4 - uint8_t fc_linkspeed; /* Link speed after last READ_LA */ uint32_t fc_eventTag; /* event tag for link attention */ @@ -489,8 +490,9 @@ struct lpfc_hba { uint32_t work_hs; /* HS stored in case of ERRAT */ uint32_t work_status[2]; /* Extra status from SLIM */ - wait_queue_head_t *work_wait; + wait_queue_head_t work_waitq; struct task_struct *worker_thread; + long data_flags; uint32_t hbq_in_use; /* HBQs in use flag */ struct list_head hbqbuf_in_list; /* in-fly hbq buffer list */ @@ -637,6 +639,17 @@ lpfc_is_link_up(struct lpfc_hba *phba) phba->link_state == LPFC_HBA_READY; } +static inline void +lpfc_worker_wake_up(struct lpfc_hba *phba) +{ + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); + + /* Wake up worker thread */ + wake_up(&phba->work_waitq); + return; +} + #define FC_REG_DUMP_EVENT 0x10 /* Register for Dump events */ #define FC_REG_TEMPERATURE_EVENT 0x20 /* Register for temperature event */ diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 960baaf..37bfa0b 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -1995,8 +1995,7 @@ sysfs_mbox_read(struct kobject *kobj, struct bin_attribute *bin_attr, /* Don't allow mailbox commands to be sent when blocked * or when in the middle of discovery */ - if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO || - vport->fc_flag & FC_NDISC_ACTIVE) { + if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO) { sysfs_mbox_idle(phba); spin_unlock_irq(&phba->hbalock); return -EAGAIN; diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h index 7c9f831..1b82452 100644 --- a/drivers/scsi/lpfc/lpfc_crtn.h +++ b/drivers/scsi/lpfc/lpfc_crtn.h @@ -142,7 +142,7 @@ int lpfc_config_port_post(struct lpfc_hba *); int lpfc_hba_down_prep(struct lpfc_hba *); int lpfc_hba_down_post(struct lpfc_hba *); void lpfc_hba_init(struct lpfc_hba *, uint32_t *); -int lpfc_post_buffer(struct lpfc_hba *, struct lpfc_sli_ring *, int, int); +int lpfc_post_buffer(struct lpfc_hba *, struct lpfc_sli_ring *, int); void lpfc_decode_firmware_rev(struct lpfc_hba *, char *, int); int lpfc_online(struct lpfc_hba *); void lpfc_unblock_mgmt_io(struct lpfc_hba *); @@ -263,6 +263,7 @@ extern int lpfc_sli_mode; extern int lpfc_enable_npiv; int lpfc_vport_symbolic_node_name(struct lpfc_vport *, char *, size_t); +int lpfc_vport_symbolic_port_name(struct lpfc_vport *, char *, size_t); void lpfc_terminate_rport_io(struct fc_rport *); void lpfc_dev_loss_tmo_callbk(struct fc_rport *rport); diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c index 153afae..7fc74cf 100644 --- a/drivers/scsi/lpfc/lpfc_ct.c +++ b/drivers/scsi/lpfc/lpfc_ct.c @@ -101,7 +101,7 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, /* Not enough posted buffers; Try posting more buffers */ phba->fc_stat.NoRcvBuf++; if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) - lpfc_post_buffer(phba, pring, 2, 1); + lpfc_post_buffer(phba, pring, 2); return; } @@ -151,7 +151,7 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, } list_del(&iocbq->list); lpfc_sli_release_iocbq(phba, iocbq); - lpfc_post_buffer(phba, pring, i, 1); + lpfc_post_buffer(phba, pring, i); } } } @@ -990,7 +990,7 @@ lpfc_cmpl_ct_cmd_rff_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, return; } -static int +int lpfc_vport_symbolic_port_name(struct lpfc_vport *vport, char *symbol, size_t size) { @@ -1679,20 +1679,18 @@ lpfc_fdmi_tmo(unsigned long ptr) { struct lpfc_vport *vport = (struct lpfc_vport *)ptr; struct lpfc_hba *phba = vport->phba; + uint32_t tmo_posted; unsigned long iflag; spin_lock_irqsave(&vport->work_port_lock, iflag); - if (!(vport->work_port_events & WORKER_FDMI_TMO)) { + tmo_posted = vport->work_port_events & WORKER_FDMI_TMO; + if (!tmo_posted) vport->work_port_events |= WORKER_FDMI_TMO; - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + spin_unlock_irqrestore(&vport->work_port_lock, iflag); - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflag); - } - else - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + if (!tmo_posted) + lpfc_worker_wake_up(phba); + return; } void diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 886c5f1..f54e0f7 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -1754,29 +1754,34 @@ lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp) struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_work_evt *evtp; + if (!(nlp->nlp_flag & NLP_DELAY_TMO)) + return; spin_lock_irq(shost->host_lock); nlp->nlp_flag &= ~NLP_DELAY_TMO; spin_unlock_irq(shost->host_lock); del_timer_sync(&nlp->nlp_delayfunc); nlp->nlp_last_elscmd = 0; - if (!list_empty(&nlp->els_retry_evt.evt_listp)) { list_del_init(&nlp->els_retry_evt.evt_listp); /* Decrement nlp reference count held for the delayed retry */ evtp = &nlp->els_retry_evt; lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1); } - if (nlp->nlp_flag & NLP_NPR_2B_DISC) { spin_lock_irq(shost->host_lock); nlp->nlp_flag &= ~NLP_NPR_2B_DISC; spin_unlock_irq(shost->host_lock); if (vport->num_disc_nodes) { - /* Check to see if there are more - * PLOGIs to be sent - */ - lpfc_more_plogi(vport); - + if (vport->port_state < LPFC_VPORT_READY) { + /* Check if there are more ADISCs to be sent */ + lpfc_more_adisc(vport); + if ((vport->num_disc_nodes == 0) && + (vport->fc_npr_cnt)) + lpfc_els_disc_plogi(vport); + } else { + /* Check if there are more PLOGIs to be sent */ + lpfc_more_plogi(vport); + } if (vport->num_disc_nodes == 0) { spin_lock_irq(shost->host_lock); vport->fc_flag &= ~FC_NDISC_ACTIVE; @@ -1798,10 +1803,6 @@ lpfc_els_retry_delay(unsigned long ptr) unsigned long flags; struct lpfc_work_evt *evtp = &ndlp->els_retry_evt; - ndlp = (struct lpfc_nodelist *) ptr; - phba = ndlp->vport->phba; - evtp = &ndlp->els_retry_evt; - spin_lock_irqsave(&phba->hbalock, flags); if (!list_empty(&evtp->evt_listp)) { spin_unlock_irqrestore(&phba->hbalock, flags); @@ -1812,11 +1813,11 @@ lpfc_els_retry_delay(unsigned long ptr) * count until the queued work is done */ evtp->evt_arg1 = lpfc_nlp_get(ndlp); - evtp->evt = LPFC_EVT_ELS_RETRY; - list_add_tail(&evtp->evt_listp, &phba->work_list); - if (phba->work_wait) + if (evtp->evt_arg1) { + evtp->evt = LPFC_EVT_ELS_RETRY; + list_add_tail(&evtp->evt_listp, &phba->work_list); lpfc_worker_wake_up(phba); - + } spin_unlock_irqrestore(&phba->hbalock, flags); return; } @@ -2761,10 +2762,11 @@ lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb, npr = (PRLI *) pcmd; vpd = &phba->vpd; /* - * If our firmware version is 3.20 or later, - * set the following bits for FC-TAPE support. + * If the remote port is a target and our firmware version is 3.20 or + * later, set the following bits for FC-TAPE support. */ - if (vpd->rev.feaLevelHigh >= 0x02) { + if ((ndlp->nlp_type & NLP_FCP_TARGET) && + (vpd->rev.feaLevelHigh >= 0x02)) { npr->ConfmComplAllowed = 1; npr->Retry = 1; npr->TaskRetryIdReq = 1; @@ -3056,27 +3058,16 @@ lpfc_rscn_recovery_check(struct lpfc_vport *vport) { struct lpfc_nodelist *ndlp = NULL; - /* Look at all nodes effected by pending RSCNs and move - * them to NPR state. - */ - + /* Move all affected nodes by pending RSCNs to NPR state. */ list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { if (!NLP_CHK_NODE_ACT(ndlp) || - ndlp->nlp_state == NLP_STE_UNUSED_NODE || - lpfc_rscn_payload_check(vport, ndlp->nlp_DID) == 0) + (ndlp->nlp_state == NLP_STE_UNUSED_NODE) || + !lpfc_rscn_payload_check(vport, ndlp->nlp_DID)) continue; - lpfc_disc_state_machine(vport, ndlp, NULL, - NLP_EVT_DEVICE_RECOVERY); - - /* - * Make sure NLP_DELAY_TMO is NOT running after a device - * recovery event. - */ - if (ndlp->nlp_flag & NLP_DELAY_TMO) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + NLP_EVT_DEVICE_RECOVERY); + lpfc_cancel_retry_delay_tmo(vport, ndlp); } - return 0; } @@ -3781,91 +3772,27 @@ static int lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb, struct lpfc_nodelist *fan_ndlp) { - struct lpfc_dmabuf *pcmd; + struct lpfc_hba *phba = vport->phba; uint32_t *lp; - IOCB_t *icmd; - uint32_t cmd, did; FAN *fp; - struct lpfc_nodelist *ndlp, *next_ndlp; - struct lpfc_hba *phba = vport->phba; - - /* FAN received */ - lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, - "0265 FAN received\n"); - icmd = &cmdiocb->iocb; - did = icmd->un.elsreq64.remoteID; - pcmd = (struct lpfc_dmabuf *)cmdiocb->context2; - lp = (uint32_t *)pcmd->virt; - - cmd = *lp++; - fp = (FAN *) lp; + lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n"); + lp = (uint32_t *)((struct lpfc_dmabuf *)cmdiocb->context2)->virt; + fp = (FAN *) ++lp; /* FAN received; Fan does not have a reply sequence */ - - if (phba->pport->port_state == LPFC_LOCAL_CFG_LINK) { + if ((vport == phba->pport) && + (vport->port_state == LPFC_LOCAL_CFG_LINK)) { if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName, - sizeof(struct lpfc_name)) != 0) || + sizeof(struct lpfc_name))) || (memcmp(&phba->fc_fabparam.portName, &fp->FportName, - sizeof(struct lpfc_name)) != 0)) { - /* - * This node has switched fabrics. FLOGI is required - * Clean up the old rpi's - */ - - list_for_each_entry_safe(ndlp, next_ndlp, - &vport->fc_nodes, nlp_listp) { - if (!NLP_CHK_NODE_ACT(ndlp)) - continue; - if (ndlp->nlp_state != NLP_STE_NPR_NODE) - continue; - if (ndlp->nlp_type & NLP_FABRIC) { - /* - * Clean up old Fabric, Nameserver and - * other NLP_FABRIC logins - */ - lpfc_drop_node(vport, ndlp); - - } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) { - /* Fail outstanding I/O now since this - * device is marked for PLOGI - */ - lpfc_unreg_rpi(vport, ndlp); - } - } - + sizeof(struct lpfc_name)))) { + /* This port has switched fabrics. FLOGI is required */ lpfc_initial_flogi(vport); - return 0; - } - /* Discovery not needed, - * move the nodes to their original state. - */ - list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, - nlp_listp) { - if (!NLP_CHK_NODE_ACT(ndlp)) - continue; - if (ndlp->nlp_state != NLP_STE_NPR_NODE) - continue; - - switch (ndlp->nlp_prev_state) { - case NLP_STE_UNMAPPED_NODE: - ndlp->nlp_prev_state = NLP_STE_NPR_NODE; - lpfc_nlp_set_state(vport, ndlp, - NLP_STE_UNMAPPED_NODE); - break; - - case NLP_STE_MAPPED_NODE: - ndlp->nlp_prev_state = NLP_STE_NPR_NODE; - lpfc_nlp_set_state(vport, ndlp, - NLP_STE_MAPPED_NODE); - break; - - default: - break; - } + } else { + /* FAN verified - skip FLOGI */ + vport->fc_myDID = vport->fc_prevDID; + lpfc_issue_fabric_reglogin(vport); } - - /* Start discovery - this should just do CLEAR_LA */ - lpfc_disc_start(vport); } return 0; } @@ -3875,20 +3802,17 @@ lpfc_els_timeout(unsigned long ptr) { struct lpfc_vport *vport = (struct lpfc_vport *) ptr; struct lpfc_hba *phba = vport->phba; + uint32_t tmo_posted; unsigned long iflag; spin_lock_irqsave(&vport->work_port_lock, iflag); - if ((vport->work_port_events & WORKER_ELS_TMO) == 0) { + tmo_posted = vport->work_port_events & WORKER_ELS_TMO; + if (!tmo_posted) vport->work_port_events |= WORKER_ELS_TMO; - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + spin_unlock_irqrestore(&vport->work_port_lock, iflag); - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflag); - } - else - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + if (!tmo_posted) + lpfc_worker_wake_up(phba); return; } @@ -3933,9 +3857,6 @@ lpfc_els_timeout_handler(struct lpfc_vport *vport) els_command == ELS_CMD_FDISC) continue; - if (vport != piocb->vport) - continue; - if (piocb->drvrTimeout > 0) { if (piocb->drvrTimeout >= timeout) piocb->drvrTimeout -= timeout; @@ -4089,7 +4010,7 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, payload = ((struct lpfc_dmabuf *)elsiocb->context2)->virt; cmd = *payload; if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0) - lpfc_post_buffer(phba, pring, 1, 1); + lpfc_post_buffer(phba, pring, 1); did = icmd->un.rcvels.remoteID; if (icmd->ulpStatus) { @@ -4398,7 +4319,7 @@ lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, phba->fc_stat.NoRcvBuf++; /* Not enough posted buffers; Try posting more buffers */ if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) - lpfc_post_buffer(phba, pring, 0, 1); + lpfc_post_buffer(phba, pring, 0); return; } @@ -4842,18 +4763,16 @@ lpfc_fabric_block_timeout(unsigned long ptr) struct lpfc_hba *phba = (struct lpfc_hba *) ptr; unsigned long iflags; uint32_t tmo_posted; + spin_lock_irqsave(&phba->pport->work_port_lock, iflags); tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO; if (!tmo_posted) phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags); - if (!tmo_posted) { - spin_lock_irqsave(&phba->hbalock, iflags); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflags); - } + if (!tmo_posted) + lpfc_worker_wake_up(phba); + return; } static void diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 7cb68fe..a98d11b 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -153,11 +153,11 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport) * count until this queued work is done */ evtp->evt_arg1 = lpfc_nlp_get(ndlp); - evtp->evt = LPFC_EVT_DEV_LOSS; - list_add_tail(&evtp->evt_listp, &phba->work_list); - if (phba->work_wait) - wake_up(phba->work_wait); - + if (evtp->evt_arg1) { + evtp->evt = LPFC_EVT_DEV_LOSS; + list_add_tail(&evtp->evt_listp, &phba->work_list); + lpfc_worker_wake_up(phba); + } spin_unlock_irq(&phba->hbalock); return; @@ -276,14 +276,6 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); } - -void -lpfc_worker_wake_up(struct lpfc_hba *phba) -{ - wake_up(phba->work_wait); - return; -} - static void lpfc_work_list_done(struct lpfc_hba *phba) { @@ -429,6 +421,8 @@ lpfc_work_done(struct lpfc_hba *phba) || (pring->flag & LPFC_DEFERRED_RING_EVENT)) { if (pring->flag & LPFC_STOP_IOCB_EVENT) { pring->flag |= LPFC_DEFERRED_RING_EVENT; + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); } else { pring->flag &= ~LPFC_DEFERRED_RING_EVENT; lpfc_sli_handle_slow_ring_event(phba, pring, @@ -459,69 +453,29 @@ lpfc_work_done(struct lpfc_hba *phba) lpfc_work_list_done(phba); } -static int -check_work_wait_done(struct lpfc_hba *phba) -{ - struct lpfc_vport *vport; - struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; - int rc = 0; - - spin_lock_irq(&phba->hbalock); - list_for_each_entry(vport, &phba->port_list, listentry) { - if (vport->work_port_events) { - rc = 1; - break; - } - } - if (rc || phba->work_ha || (!list_empty(&phba->work_list)) || - kthread_should_stop() || pring->flag & LPFC_DEFERRED_RING_EVENT) { - rc = 1; - phba->work_found++; - } else - phba->work_found = 0; - spin_unlock_irq(&phba->hbalock); - return rc; -} - - int lpfc_do_work(void *p) { struct lpfc_hba *phba = p; int rc; - DECLARE_WAIT_QUEUE_HEAD_ONSTACK(work_waitq); set_user_nice(current, -20); - phba->work_wait = &work_waitq; - phba->work_found = 0; + phba->data_flags = 0; while (1) { - - rc = wait_event_interruptible(work_waitq, - check_work_wait_done(phba)); - + /* wait and check worker queue activities */ + rc = wait_event_interruptible(phba->work_waitq, + (test_and_clear_bit(LPFC_DATA_READY, + &phba->data_flags) + || kthread_should_stop())); BUG_ON(rc); if (kthread_should_stop()) break; + /* Attend pending lpfc data processing */ lpfc_work_done(phba); - - /* If there is alot of slow ring work, like during link up - * check_work_wait_done() may cause this thread to not give - * up the CPU for very long periods of time. This may cause - * soft lockups or other problems. To avoid these situations - * give up the CPU here after LPFC_MAX_WORKER_ITERATION - * consecutive iterations. - */ - if (phba->work_found >= LPFC_MAX_WORKER_ITERATION) { - phba->work_found = 0; - schedule(); - } } - spin_lock_irq(&phba->hbalock); - phba->work_wait = NULL; - spin_unlock_irq(&phba->hbalock); return 0; } @@ -551,10 +505,10 @@ lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2, spin_lock_irqsave(&phba->hbalock, flags); list_add_tail(&evtp->evt_listp, &phba->work_list); - if (phba->work_wait) - lpfc_worker_wake_up(phba); spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_worker_wake_up(phba); + return 1; } @@ -963,6 +917,10 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la) if (phba->fc_topology == TOPOLOGY_LOOP) { phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED; + if (phba->cfg_enable_npiv) + lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT, + "1309 Link Up Event npiv not supported in loop " + "topology\n"); /* Get Loop Map information */ if (la->il) vport->fc_flag |= FC_LBIT; @@ -1087,6 +1045,8 @@ lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) MAILBOX_t *mb = &pmb->mb; struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1); + /* Unblock ELS traffic */ + phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT; /* Check for error */ if (mb->mbxStatus) { lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT, @@ -1650,7 +1610,6 @@ lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, ndlp->nlp_DID, old_state, state); if (old_state == NLP_STE_NPR_NODE && - (ndlp->nlp_flag & NLP_DELAY_TMO) != 0 && state != NLP_STE_NPR_NODE) lpfc_cancel_retry_delay_tmo(vport, ndlp); if (old_state == NLP_STE_UNMAPPED_NODE) { @@ -1687,8 +1646,7 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { struct Scsi_Host *shost = lpfc_shost_from_vport(vport); - if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + lpfc_cancel_retry_delay_tmo(vport, ndlp); if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp)) lpfc_nlp_counters(vport, ndlp->nlp_state, -1); spin_lock_irq(shost->host_lock); @@ -1701,8 +1659,7 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) static void lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { - if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + lpfc_cancel_retry_delay_tmo(vport, ndlp); if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp)) lpfc_nlp_counters(vport, ndlp->nlp_state, -1); lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state, @@ -2121,10 +2078,8 @@ lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) ndlp->nlp_last_elscmd = 0; del_timer_sync(&ndlp->nlp_delayfunc); - if (!list_empty(&ndlp->els_retry_evt.evt_listp)) - list_del_init(&ndlp->els_retry_evt.evt_listp); - if (!list_empty(&ndlp->dev_loss_evt.evt_listp)) - list_del_init(&ndlp->dev_loss_evt.evt_listp); + list_del_init(&ndlp->els_retry_evt.evt_listp); + list_del_init(&ndlp->dev_loss_evt.evt_listp); lpfc_unreg_rpi(vport, ndlp); @@ -2144,10 +2099,7 @@ lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) LPFC_MBOXQ_t *mbox; int rc; - if (ndlp->nlp_flag & NLP_DELAY_TMO) { - lpfc_cancel_retry_delay_tmo(vport, ndlp); - } - + lpfc_cancel_retry_delay_tmo(vport, ndlp); if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) { /* For this case we need to cleanup the default rpi * allocated by the firmware. @@ -2317,8 +2269,7 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did) /* Since this node is marked for discovery, * delay timeout is not needed. */ - if (ndlp->nlp_flag & NLP_DELAY_TMO) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + lpfc_cancel_retry_delay_tmo(vport, ndlp); } else ndlp = NULL; } else { @@ -2643,21 +2594,20 @@ lpfc_disc_timeout(unsigned long ptr) { struct lpfc_vport *vport = (struct lpfc_vport *) ptr; struct lpfc_hba *phba = vport->phba; + uint32_t tmo_posted; unsigned long flags = 0; if (unlikely(!phba)) return; - if ((vport->work_port_events & WORKER_DISC_TMO) == 0) { - spin_lock_irqsave(&vport->work_port_lock, flags); + spin_lock_irqsave(&vport->work_port_lock, flags); + tmo_posted = vport->work_port_events & WORKER_DISC_TMO; + if (!tmo_posted) vport->work_port_events |= WORKER_DISC_TMO; - spin_unlock_irqrestore(&vport->work_port_lock, flags); + spin_unlock_irqrestore(&vport->work_port_lock, flags); - spin_lock_irqsave(&phba->hbalock, flags); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, flags); - } + if (!tmo_posted) + lpfc_worker_wake_up(phba); return; } diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index fa757b2..5b6e539 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -145,8 +145,10 @@ lpfc_config_port_prep(struct lpfc_hba *phba) return -ERESTART; } - if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp) + if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp) { + mempool_free(pmb, phba->mbox_mem_pool); return -EINVAL; + } /* Save information as VPD data */ vp->rev.rBit = 1; @@ -551,18 +553,18 @@ static void lpfc_hb_timeout(unsigned long ptr) { struct lpfc_hba *phba; + uint32_t tmo_posted; unsigned long iflag; phba = (struct lpfc_hba *)ptr; spin_lock_irqsave(&phba->pport->work_port_lock, iflag); - if (!(phba->pport->work_port_events & WORKER_HB_TMO)) + tmo_posted = phba->pport->work_port_events & WORKER_HB_TMO; + if (!tmo_posted) phba->pport->work_port_events |= WORKER_HB_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag); - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - wake_up(phba->work_wait); - spin_unlock_irqrestore(&phba->hbalock, iflag); + if (!tmo_posted) + lpfc_worker_wake_up(phba); return; } @@ -851,6 +853,8 @@ lpfc_handle_latt(struct lpfc_hba *phba) lpfc_read_la(phba, pmb, mp); pmb->mbox_cmpl = lpfc_mbx_cmpl_read_la; pmb->vport = vport; + /* Block ELS IOCBs until we have processed this mbox command */ + phba->sli.ring[LPFC_ELS_RING].flag |= LPFC_STOP_IOCB_EVENT; rc = lpfc_sli_issue_mbox (phba, pmb, MBX_NOWAIT); if (rc == MBX_NOT_FINISHED) { rc = 4; @@ -866,6 +870,7 @@ lpfc_handle_latt(struct lpfc_hba *phba) return; lpfc_handle_latt_free_mbuf: + phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT; lpfc_mbuf_free(phba, mp->virt, mp->phys); lpfc_handle_latt_free_mp: kfree(mp); @@ -1194,8 +1199,7 @@ lpfc_get_hba_model_desc(struct lpfc_hba *phba, uint8_t *mdp, uint8_t *descp) /* Returns the number of buffers NOT posted. */ /**************************************************/ int -lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt, - int type) +lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt) { IOCB_t *icmd; struct lpfc_iocbq *iocb; @@ -1295,7 +1299,7 @@ lpfc_post_rcv_buf(struct lpfc_hba *phba) struct lpfc_sli *psli = &phba->sli; /* Ring 0, ELS / CT buffers */ - lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0, 1); + lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0); /* Ring 2 - FCP no buffers needed */ return 0; @@ -1454,6 +1458,15 @@ lpfc_cleanup(struct lpfc_vport *vport) lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); + + /* nlp_type zero is not defined, nlp_flag zero also not defined, + * nlp_state is unused, this happens when + * an initiator has logged + * into us so cleanup this ndlp. + */ + if ((ndlp->nlp_type == 0) && (ndlp->nlp_flag == 0) && + (ndlp->nlp_state == 0)) + lpfc_nlp_put(ndlp); } /* At this point, ALL ndlp's should be gone @@ -2101,6 +2114,9 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid) phba->work_ha_mask = (HA_ERATT|HA_MBATT|HA_LATT); phba->work_ha_mask |= (HA_RXMASK << (LPFC_ELS_RING * 4)); + /* Initialize the wait queue head for the kernel thread */ + init_waitqueue_head(&phba->work_waitq); + /* Startup the kernel thread for this host adapter. */ phba->worker_thread = kthread_run(lpfc_do_work, phba, "lpfc_worker_%d", phba->brd_no); diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c index d08c4c8..6688a86 100644 --- a/drivers/scsi/lpfc/lpfc_nportdisc.c +++ b/drivers/scsi/lpfc/lpfc_nportdisc.c @@ -235,10 +235,7 @@ lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) (iocb->iocb_cmpl) (phba, iocb, iocb); } } - - /* If we are delaying issuing an ELS command, cancel it */ - if (ndlp->nlp_flag & NLP_DELAY_TMO) - lpfc_cancel_retry_delay_tmo(phba->pport, ndlp); + lpfc_cancel_retry_delay_tmo(phba->pport, ndlp); return 0; } @@ -249,7 +246,6 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_hba *phba = vport->phba; struct lpfc_dmabuf *pcmd; - struct lpfc_work_evt *evtp; uint32_t *lp; IOCB_t *icmd; struct serv_parm *sp; @@ -425,73 +421,8 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, ndlp, mbox); return 1; } - - /* If the remote NPort logs into us, before we can initiate - * discovery to them, cleanup the NPort from discovery accordingly. - */ - if (ndlp->nlp_state == NLP_STE_NPR_NODE) { - spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_DELAY_TMO; - spin_unlock_irq(shost->host_lock); - del_timer_sync(&ndlp->nlp_delayfunc); - ndlp->nlp_last_elscmd = 0; - - if (!list_empty(&ndlp->els_retry_evt.evt_listp)) { - list_del_init(&ndlp->els_retry_evt.evt_listp); - /* Decrement ndlp reference count held for the - * delayed retry - */ - evtp = &ndlp->els_retry_evt; - lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1); - } - - if (ndlp->nlp_flag & NLP_NPR_2B_DISC) { - spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; - spin_unlock_irq(shost->host_lock); - - if ((ndlp->nlp_flag & NLP_ADISC_SND) && - (vport->num_disc_nodes)) { - /* Check to see if there are more - * ADISCs to be sent - */ - lpfc_more_adisc(vport); - - if ((vport->num_disc_nodes == 0) && - (vport->fc_npr_cnt)) - lpfc_els_disc_plogi(vport); - - if (vport->num_disc_nodes == 0) { - spin_lock_irq(shost->host_lock); - vport->fc_flag &= ~FC_NDISC_ACTIVE; - spin_unlock_irq(shost->host_lock); - lpfc_can_disctmo(vport); - lpfc_end_rscn(vport); - } - } - } - } else if ((ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) && - (ndlp->nlp_flag & NLP_NPR_2B_DISC) && - (vport->num_disc_nodes)) { - spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; - spin_unlock_irq(shost->host_lock); - /* Check to see if there are more - * PLOGIs to be sent - */ - lpfc_more_plogi(vport); - if (vport->num_disc_nodes == 0) { - spin_lock_irq(shost->host_lock); - vport->fc_flag &= ~FC_NDISC_ACTIVE; - spin_unlock_irq(shost->host_lock); - lpfc_can_disctmo(vport); - lpfc_end_rscn(vport); - } - } - lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox); return 1; - out: stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC; stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE; @@ -574,7 +505,9 @@ lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, else lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL); - if (!(ndlp->nlp_type & NLP_FABRIC) || + if ((!(ndlp->nlp_type & NLP_FABRIC) && + ((ndlp->nlp_type & NLP_FCP_TARGET) || + !(ndlp->nlp_type & NLP_FCP_INITIATOR))) || (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) { /* Only try to re-login if this is NOT a Fabric Node */ mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1); @@ -751,6 +684,7 @@ static uint32_t lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { + struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *cmdiocb = arg; struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2; @@ -776,7 +710,22 @@ lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL); } else { - lpfc_rcv_plogi(vport, ndlp, cmdiocb); + if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) && + (ndlp->nlp_flag & NLP_NPR_2B_DISC) && + (vport->num_disc_nodes)) { + spin_lock_irq(shost->host_lock); + ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; + spin_unlock_irq(shost->host_lock); + /* Check if there are more PLOGIs to be sent */ + lpfc_more_plogi(vport); + if (vport->num_disc_nodes == 0) { + spin_lock_irq(shost->host_lock); + vport->fc_flag &= ~FC_NDISC_ACTIVE; + spin_unlock_irq(shost->host_lock); + lpfc_can_disctmo(vport); + lpfc_end_rscn(vport); + } + } } /* If our portname was less */ return ndlp->nlp_state; @@ -1040,6 +989,7 @@ static uint32_t lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { + struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *cmdiocb; @@ -1048,9 +998,28 @@ lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, cmdiocb = (struct lpfc_iocbq *) arg; - if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) - return ndlp->nlp_state; + if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) { + if (ndlp->nlp_flag & NLP_NPR_2B_DISC) { + spin_lock_irq(shost->host_lock); + ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; + spin_unlock_irq(shost->host_lock); + if (vport->num_disc_nodes) { + lpfc_more_adisc(vport); + if ((vport->num_disc_nodes == 0) && + (vport->fc_npr_cnt)) + lpfc_els_disc_plogi(vport); + if (vport->num_disc_nodes == 0) { + spin_lock_irq(shost->host_lock); + vport->fc_flag &= ~FC_NDISC_ACTIVE; + spin_unlock_irq(shost->host_lock); + lpfc_can_disctmo(vport); + lpfc_end_rscn(vport); + } + } + } + return ndlp->nlp_state; + } ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE; lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0); lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE); @@ -1742,24 +1711,21 @@ lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg; /* Ignore PLOGI if we have an outstanding LOGO */ - if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC)) { + if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC)) return ndlp->nlp_state; - } - if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) { + lpfc_cancel_retry_delay_tmo(vport, ndlp); spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_NPR_ADISC; + ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC); spin_unlock_irq(shost->host_lock); - return ndlp->nlp_state; - } - - /* send PLOGI immediately, move to PLOGI issue state */ - if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) { - ndlp->nlp_prev_state = NLP_STE_NPR_NODE; - lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE); - lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0); + } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) { + /* send PLOGI immediately, move to PLOGI issue state */ + if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) { + ndlp->nlp_prev_state = NLP_STE_NPR_NODE; + lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE); + lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0); + } } - return ndlp->nlp_state; } @@ -1810,7 +1776,6 @@ lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg; lpfc_rcv_padisc(vport, ndlp, cmdiocb); - /* * Do not start discovery if discovery is about to start * or discovery in progress for this node. Starting discovery @@ -1973,9 +1938,7 @@ lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, spin_lock_irq(shost->host_lock); ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC); spin_unlock_irq(shost->host_lock); - if (ndlp->nlp_flag & NLP_DELAY_TMO) { - lpfc_cancel_retry_delay_tmo(vport, ndlp); - } + lpfc_cancel_retry_delay_tmo(vport, ndlp); return ndlp->nlp_state; } diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 0910a9a..c94da4f 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -50,6 +50,7 @@ void lpfc_adjust_queue_depth(struct lpfc_hba *phba) { unsigned long flags; + uint32_t evt_posted; spin_lock_irqsave(&phba->hbalock, flags); atomic_inc(&phba->num_rsrc_err); @@ -65,17 +66,13 @@ lpfc_adjust_queue_depth(struct lpfc_hba *phba) spin_unlock_irqrestore(&phba->hbalock, flags); spin_lock_irqsave(&phba->pport->work_port_lock, flags); - if ((phba->pport->work_port_events & - WORKER_RAMP_DOWN_QUEUE) == 0) { + evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; + if (!evt_posted) phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; - } spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); - spin_lock_irqsave(&phba->hbalock, flags); - if (phba->work_wait) - wake_up(phba->work_wait); - spin_unlock_irqrestore(&phba->hbalock, flags); - + if (!evt_posted) + lpfc_worker_wake_up(phba); return; } @@ -89,6 +86,7 @@ lpfc_rampup_queue_depth(struct lpfc_vport *vport, { unsigned long flags; struct lpfc_hba *phba = vport->phba; + uint32_t evt_posted; atomic_inc(&phba->num_cmd_success); if (vport->cfg_lun_queue_depth <= sdev->queue_depth) @@ -103,16 +101,14 @@ lpfc_rampup_queue_depth(struct lpfc_vport *vport, spin_unlock_irqrestore(&phba->hbalock, flags); spin_lock_irqsave(&phba->pport->work_port_lock, flags); - if ((phba->pport->work_port_events & - WORKER_RAMP_UP_QUEUE) == 0) { + evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; + if (!evt_posted) phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; - } spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); - spin_lock_irqsave(&phba->hbalock, flags); - if (phba->work_wait) - wake_up(phba->work_wait); - spin_unlock_irqrestore(&phba->hbalock, flags); + if (!evt_posted) + lpfc_worker_wake_up(phba); + return; } void @@ -609,9 +605,6 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, result = cmd->result; sdev = cmd->device; lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); - spin_lock_irqsave(sdev->host->host_lock, flags); - lpfc_cmd->pCmd = NULL; /* This must be done before scsi_done */ - spin_unlock_irqrestore(sdev->host->host_lock, flags); cmd->scsi_done(cmd); if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { @@ -620,6 +613,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, * wake up the thread. */ spin_lock_irqsave(sdev->host->host_lock, flags); + lpfc_cmd->pCmd = NULL; if (lpfc_cmd->waitq) wake_up(lpfc_cmd->waitq); spin_unlock_irqrestore(sdev->host->host_lock, flags); @@ -690,6 +684,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, * wake up the thread. */ spin_lock_irqsave(sdev->host->host_lock, flags); + lpfc_cmd->pCmd = NULL; if (lpfc_cmd->waitq) wake_up(lpfc_cmd->waitq); spin_unlock_irqrestore(sdev->host->host_lock, flags); @@ -849,14 +844,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, struct lpfc_iocbq *iocbq; struct lpfc_iocbq *iocbqrsp; int ret; + int status; if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode)) return FAILED; lpfc_cmd->rdata = rdata; - ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, + status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, FCP_TARGET_RESET); - if (!ret) + if (!status) return FAILED; iocbq = &lpfc_cmd->cur_iocbq; @@ -869,12 +865,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0702 Issue Target Reset to TGT %d Data: x%x x%x\n", tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag); - ret = lpfc_sli_issue_iocb_wait(phba, + status = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); - if (ret != IOCB_SUCCESS) { - if (ret == IOCB_TIMEDOUT) + if (status != IOCB_SUCCESS) { + if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; + ret = TIMEOUT_ERROR; + } else + ret = FAILED; lpfc_cmd->status = IOSTAT_DRIVER_REJECT; } else { ret = SUCCESS; @@ -1142,121 +1141,96 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd) struct lpfc_iocbq *iocbq, *iocbqrsp; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *pnode = rdata->pnode; - uint32_t cmd_result = 0, cmd_status = 0; - int ret = FAILED; - int iocb_status = IOCB_SUCCESS; - int cnt, loopcnt; + unsigned long later; + int ret = SUCCESS; + int status; + int cnt; lpfc_block_error_handler(cmnd); - loopcnt = 0; /* * If target is not in a MAPPED state, delay the reset until * target is rediscovered or devloss timeout expires. */ - while (1) { + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies)) { if (!pnode || !NLP_CHK_NODE_ACT(pnode)) - goto out; - - if (pnode->nlp_state != NLP_STE_MAPPED_NODE) { - schedule_timeout_uninterruptible(msecs_to_jiffies(500)); - loopcnt++; - rdata = cmnd->device->hostdata; - if (!rdata || - (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){ - lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, - "0721 LUN Reset rport " - "failure: cnt x%x rdata x%p\n", - loopcnt, rdata); - goto out; - } - pnode = rdata->pnode; - if (!pnode || !NLP_CHK_NODE_ACT(pnode)) - goto out; - } + return FAILED; if (pnode->nlp_state == NLP_STE_MAPPED_NODE) break; + schedule_timeout_uninterruptible(msecs_to_jiffies(500)); + rdata = cmnd->device->hostdata; + if (!rdata) + break; + pnode = rdata->pnode; + } + if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, + "0721 LUN Reset rport " + "failure: msec x%x rdata x%p\n", + jiffies_to_msecs(jiffies - later), rdata); + return FAILED; } - lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) - goto out; - + return FAILED; lpfc_cmd->timeout = 60; lpfc_cmd->rdata = rdata; - ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun, - FCP_TARGET_RESET); - if (!ret) - goto out_free_scsi_buf; - + status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, + cmnd->device->lun, + FCP_TARGET_RESET); + if (!status) { + lpfc_release_scsi_buf(phba, lpfc_cmd); + return FAILED; + } iocbq = &lpfc_cmd->cur_iocbq; /* get a buffer for this IOCB command response */ iocbqrsp = lpfc_sli_get_iocbq(phba); - if (iocbqrsp == NULL) - goto out_free_scsi_buf; - + if (iocbqrsp == NULL) { + lpfc_release_scsi_buf(phba, lpfc_cmd); + return FAILED; + } lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0703 Issue target reset to TGT %d LUN %d " "rpi x%x nlp_flag x%x\n", cmnd->device->id, cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag); - iocb_status = lpfc_sli_issue_iocb_wait(phba, - &phba->sli.ring[phba->sli.fcp_ring], - iocbq, iocbqrsp, lpfc_cmd->timeout); - - if (iocb_status == IOCB_TIMEDOUT) + status = lpfc_sli_issue_iocb_wait(phba, + &phba->sli.ring[phba->sli.fcp_ring], + iocbq, iocbqrsp, lpfc_cmd->timeout); + if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; - - if (iocb_status == IOCB_SUCCESS) - ret = SUCCESS; - else - ret = iocb_status; - - cmd_result = iocbqrsp->iocb.un.ulpWord[4]; - cmd_status = iocbqrsp->iocb.ulpStatus; - + ret = TIMEOUT_ERROR; + } else { + if (status != IOCB_SUCCESS) + ret = FAILED; + lpfc_release_scsi_buf(phba, lpfc_cmd); + } + lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, + "0713 SCSI layer issued device reset (%d, %d) " + "return x%x status x%x result x%x\n", + cmnd->device->id, cmnd->device->lun, ret, + iocbqrsp->iocb.ulpStatus, + iocbqrsp->iocb.un.ulpWord[4]); lpfc_sli_release_iocbq(phba, iocbqrsp); - - /* - * All outstanding txcmplq I/Os should have been aborted by the device. - * Unfortunately, some targets do not abide by this forcing the driver - * to double check. - */ cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, - LPFC_CTX_LUN); + LPFC_CTX_TGT); if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, - LPFC_CTX_LUN); - loopcnt = 0; - while(cnt) { - schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); - - if (++loopcnt - > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT) - break; - + LPFC_CTX_TGT); + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies) && cnt) { + schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, - cmnd->device->lun, LPFC_CTX_LUN); + cmnd->device->lun, LPFC_CTX_TGT); } - if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0719 device reset I/O flush failure: " "cnt x%x\n", cnt); ret = FAILED; } - -out_free_scsi_buf: - if (iocb_status != IOCB_TIMEDOUT) { - lpfc_release_scsi_buf(phba, lpfc_cmd); - } - lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, - "0713 SCSI layer issued device reset (%d, %d) " - "return x%x status x%x result x%x\n", - cmnd->device->id, cmnd->device->lun, ret, - cmd_status, cmd_result); -out: return ret; } @@ -1268,19 +1242,12 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) struct lpfc_hba *phba = vport->phba; struct lpfc_nodelist *ndlp = NULL; int match; - int ret = FAILED, i, err_count = 0; - int cnt, loopcnt; + int ret = SUCCESS, status, i; + int cnt; struct lpfc_scsi_buf * lpfc_cmd; + unsigned long later; lpfc_block_error_handler(cmnd); - - lpfc_cmd = lpfc_get_scsi_buf(phba); - if (lpfc_cmd == NULL) - goto out; - - /* The lpfc_cmd storage is reused. Set all loop invariants. */ - lpfc_cmd->timeout = 60; - /* * Since the driver manages a single bus device, reset all * targets known to the driver. Should any target reset @@ -1294,7 +1261,7 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) if (!NLP_CHK_NODE_ACT(ndlp)) continue; if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && - i == ndlp->nlp_sid && + ndlp->nlp_sid == i && ndlp->rport) { match = 1; break; @@ -1303,27 +1270,22 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) spin_unlock_irq(shost->host_lock); if (!match) continue; - - ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, - cmnd->device->lun, - ndlp->rport->dd_data); - if (ret != SUCCESS) { + lpfc_cmd = lpfc_get_scsi_buf(phba); + if (lpfc_cmd) { + lpfc_cmd->timeout = 60; + status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, + cmnd->device->lun, + ndlp->rport->dd_data); + if (status != TIMEOUT_ERROR) + lpfc_release_scsi_buf(phba, lpfc_cmd); + } + if (!lpfc_cmd || status != SUCCESS) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0700 Bus Reset on target %d failed\n", i); - err_count++; - break; + ret = FAILED; } } - - if (ret != IOCB_TIMEDOUT) - lpfc_release_scsi_buf(phba, lpfc_cmd); - - if (err_count == 0) - ret = SUCCESS; - else - ret = FAILED; - /* * All outstanding txcmplq I/Os should have been aborted by * the targets. Unfortunately, some targets do not abide by @@ -1333,27 +1295,19 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 0, 0, LPFC_CTX_HOST); - loopcnt = 0; - while(cnt) { - schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); - - if (++loopcnt - > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT) - break; - + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies) && cnt) { + schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST); } - if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0715 Bus Reset I/O flush failure: " "cnt x%x left x%x\n", cnt, i); ret = FAILED; } - lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); -out: return ret; } diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 70a0a9e..f40aa7b 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -324,9 +324,7 @@ lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring) phba->work_ha |= HA_ERATT; phba->work_hs = HS_FFER3; - /* hbalock should already be held */ - if (phba->work_wait) - lpfc_worker_wake_up(phba); + lpfc_worker_wake_up(phba); return NULL; } @@ -1309,9 +1307,7 @@ lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) phba->work_ha |= HA_ERATT; phba->work_hs = HS_FFER3; - /* hbalock should already be held */ - if (phba->work_wait) - lpfc_worker_wake_up(phba); + lpfc_worker_wake_up(phba); return; } @@ -2611,12 +2607,9 @@ lpfc_mbox_timeout(unsigned long ptr) phba->pport->work_port_events |= WORKER_MBOX_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag); - if (!tmo_posted) { - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflag); - } + if (!tmo_posted) + lpfc_worker_wake_up(phba); + return; } void @@ -3374,8 +3367,12 @@ lpfc_sli_host_down(struct lpfc_vport *vport) for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; prev_pring_flag = pring->flag; - if (pring->ringno == LPFC_ELS_RING) /* Only slow rings */ + /* Only slow rings */ + if (pring->ringno == LPFC_ELS_RING) { pring->flag |= LPFC_DEFERRED_RING_EVENT; + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); + } /* * Error everything on the txq since these iocbs have not been * given to the FW yet. @@ -3434,8 +3431,12 @@ lpfc_sli_hba_down(struct lpfc_hba *phba) spin_lock_irqsave(&phba->hbalock, flags); for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; - if (pring->ringno == LPFC_ELS_RING) /* Only slow rings */ + /* Only slow rings */ + if (pring->ringno == LPFC_ELS_RING) { pring->flag |= LPFC_DEFERRED_RING_EVENT; + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); + } /* * Error everything on the txq since these iocbs have not been @@ -3762,7 +3763,6 @@ lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport, lpfc_ctx_cmd ctx_cmd) { struct lpfc_scsi_buf *lpfc_cmd; - struct scsi_cmnd *cmnd; int rc = 1; if (!(iocbq->iocb_flag & LPFC_IO_FCP)) @@ -3772,19 +3772,20 @@ lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport, return rc; lpfc_cmd = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); - cmnd = lpfc_cmd->pCmd; - if (cmnd == NULL) + if (lpfc_cmd->pCmd == NULL) return rc; switch (ctx_cmd) { case LPFC_CTX_LUN: - if ((cmnd->device->id == tgt_id) && - (cmnd->device->lun == lun_id)) + if ((lpfc_cmd->rdata->pnode) && + (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id) && + (scsilun_to_int(&lpfc_cmd->fcp_cmnd->fcp_lun) == lun_id)) rc = 0; break; case LPFC_CTX_TGT: - if (cmnd->device->id == tgt_id) + if ((lpfc_cmd->rdata->pnode) && + (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id)) rc = 0; break; case LPFC_CTX_HOST: @@ -3994,6 +3995,7 @@ lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq, if (pmboxq->context1) return MBX_NOT_FINISHED; + pmboxq->mbox_flag &= ~LPFC_MBX_WAKE; /* setup wake call as IOCB callback */ pmboxq->mbox_cmpl = lpfc_sli_wake_mbox_wait; /* setup context field to pass wait_queue pointer to wake function */ @@ -4159,7 +4161,7 @@ lpfc_intr_handler(int irq, void *dev_id) "pwork:x%x hawork:x%x wait:x%x", phba->work_ha, work_ha_copy, (uint32_t)((unsigned long) - phba->work_wait)); + &phba->work_waitq)); control &= ~(HC_R0INT_ENA << LPFC_ELS_RING); @@ -4172,7 +4174,7 @@ lpfc_intr_handler(int irq, void *dev_id) "x%x hawork:x%x wait:x%x", phba->work_ha, work_ha_copy, (uint32_t)((unsigned long) - phba->work_wait)); + &phba->work_waitq)); } spin_unlock(&phba->hbalock); } @@ -4297,9 +4299,8 @@ send_current_mbox: spin_lock(&phba->hbalock); phba->work_ha |= work_ha_copy; - if (phba->work_wait) - lpfc_worker_wake_up(phba); spin_unlock(&phba->hbalock); + lpfc_worker_wake_up(phba); } ha_copy &= ~(phba->work_ha_mask); diff --git a/drivers/scsi/lpfc/lpfc_version.h b/drivers/scsi/lpfc/lpfc_version.h index b22b893..ad24cac 100644 --- a/drivers/scsi/lpfc/lpfc_version.h +++ b/drivers/scsi/lpfc/lpfc_version.h @@ -18,7 +18,7 @@ * included with this package. * *******************************************************************/ -#define LPFC_DRIVER_VERSION "8.2.6" +#define LPFC_DRIVER_VERSION "8.2.7" #define LPFC_DRIVER_NAME "lpfc" diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c index 6feaf59..109f89d 100644 --- a/drivers/scsi/lpfc/lpfc_vport.c +++ b/drivers/scsi/lpfc/lpfc_vport.c @@ -216,6 +216,7 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable) int vpi; int rc = VPORT_ERROR; int status; + int size; if ((phba->sli_rev < 3) || !(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) { @@ -278,7 +279,20 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable) memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8); memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8); - + size = strnlen(fc_vport->symbolic_name, LPFC_VNAME_LEN); + if (size) { + vport->vname = kzalloc(size+1, GFP_KERNEL); + if (!vport->vname) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT, + "1814 Create VPORT failed. " + "vname allocation failed.\n"); + rc = VPORT_ERROR; + lpfc_free_vpi(phba, vpi); + destroy_port(vport); + goto error_out; + } + memcpy(vport->vname, fc_vport->symbolic_name, size+1); + } if (fc_vport->node_name != 0) u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn); if (fc_vport->port_name != 0) diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c index fd63b06..11aa917 100644 --- a/drivers/scsi/mesh.c +++ b/drivers/scsi/mesh.c @@ -1765,7 +1765,7 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg) default: return 0; } - if (mesg.event == mdev->ofdev.dev.power.power_state.event) + if (ms->phase == sleeping) return 0; scsi_block_requests(ms->host); @@ -1780,8 +1780,6 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg) disable_irq(ms->meshintr); set_mesh_power(ms, 0); - mdev->ofdev.dev.power.power_state = mesg; - return 0; } @@ -1790,7 +1788,7 @@ static int mesh_resume(struct macio_dev *mdev) struct mesh_state *ms = (struct mesh_state *)macio_get_drvdata(mdev); unsigned long flags; - if (mdev->ofdev.dev.power.power_state.event == PM_EVENT_ON) + if (ms->phase != sleeping) return 0; set_mesh_power(ms, 1); @@ -1801,8 +1799,6 @@ static int mesh_resume(struct macio_dev *mdev) enable_irq(ms->meshintr); scsi_unblock_requests(ms->host); - mdev->ofdev.dev.power.power_state.event = PM_EVENT_ON; - return 0; } diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 0c78694..5822dd5 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -113,9 +113,6 @@ static struct iscsi_transport qla4xxx_iscsi_transport = { .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | ISCSI_HOST_INITIATOR_NAME, - .sessiondata_size = sizeof(struct ddb_entry), - .host_template = &qla4xxx_driver_template, - .tgt_dscvr = qla4xxx_tgt_dscvr, .get_conn_param = qla4xxx_conn_get_param, .get_session_param = qla4xxx_sess_get_param, @@ -275,7 +272,7 @@ int qla4xxx_add_sess(struct ddb_entry *ddb_entry) return err; } - ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0); + ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0); if (!ddb_entry->conn) { iscsi_remove_session(ddb_entry->sess); DEBUG2(printk(KERN_ERR "Could not add connection.\n")); @@ -292,7 +289,8 @@ struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) struct ddb_entry *ddb_entry; struct iscsi_cls_session *sess; - sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport); + sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport, + sizeof(struct ddb_entry)); if (!sess) return NULL; diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 110e776..36c92f9 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -855,9 +855,18 @@ void scsi_finish_command(struct scsi_cmnd *cmd) good_bytes = scsi_bufflen(cmd); if (cmd->request->cmd_type != REQ_TYPE_BLOCK_PC) { + int old_good_bytes = good_bytes; drv = scsi_cmd_to_driver(cmd); if (drv->done) good_bytes = drv->done(cmd); + /* + * USB may not give sense identifying bad sector and + * simply return a residue instead, so subtract off the + * residue if drv->done() error processing indicates no + * change to the completion length. + */ + if (good_bytes == old_good_bytes) + good_bytes -= scsi_get_resid(cmd); } scsi_io_completion(cmd, good_bytes); } diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index f6600bf..01d11a0 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -94,6 +94,7 @@ static const char * scsi_debug_version_date = "20070104"; #define DEF_VIRTUAL_GB 0 #define DEF_FAKE_RW 0 #define DEF_VPD_USE_HOSTNO 1 +#define DEF_SECTOR_SIZE 512 /* bit mask values for scsi_debug_opts */ #define SCSI_DEBUG_OPT_NOISE 1 @@ -142,6 +143,7 @@ static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; static int scsi_debug_fake_rw = DEF_FAKE_RW; static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; +static int scsi_debug_sector_size = DEF_SECTOR_SIZE; static int scsi_debug_cmnd_count = 0; @@ -157,11 +159,6 @@ static int sdebug_heads; /* heads per disk */ static int sdebug_cylinders_per; /* cylinders per surface */ static int sdebug_sectors_per; /* sectors per cylinder */ -/* default sector size is 512 bytes, 2**9 bytes */ -#define POW2_SECT_SIZE 9 -#define SECT_SIZE (1 << POW2_SECT_SIZE) -#define SECT_SIZE_PER(TGT) SECT_SIZE - #define SDEBUG_MAX_PARTS 4 #define SDEBUG_SENSE_LEN 32 @@ -646,6 +643,14 @@ static int inquiry_evpd_b0(unsigned char * arr) return sizeof(vpdb0_data); } +static int inquiry_evpd_b1(unsigned char *arr) +{ + memset(arr, 0, 0x3c); + arr[0] = 0; + arr[1] = 1; + + return 0x3c; +} #define SDEBUG_LONG_INQ_SZ 96 #define SDEBUG_MAX_INQ_ARR_SZ 584 @@ -701,6 +706,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, arr[n++] = 0x88; /* SCSI ports */ arr[n++] = 0x89; /* ATA information */ arr[n++] = 0xb0; /* Block limits (SBC) */ + arr[n++] = 0xb1; /* Block characteristics (SBC) */ arr[3] = n - 4; /* number of supported VPD pages */ } else if (0x80 == cmd[2]) { /* unit serial number */ arr[1] = cmd[2]; /*sanity */ @@ -740,6 +746,9 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_evpd_b0(&arr[4]); + } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ + arr[1] = cmd[2]; /*sanity */ + arr[3] = inquiry_evpd_b1(&arr[4]); } else { /* Illegal request, invalid field in cdb */ mk_sense_buffer(devip, ILLEGAL_REQUEST, @@ -878,8 +887,8 @@ static int resp_readcap(struct scsi_cmnd * scp, arr[2] = 0xff; arr[3] = 0xff; } - arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff; - arr[7] = SECT_SIZE_PER(target) & 0xff; + arr[6] = (scsi_debug_sector_size >> 8) & 0xff; + arr[7] = scsi_debug_sector_size & 0xff; return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); } @@ -902,10 +911,10 @@ static int resp_readcap16(struct scsi_cmnd * scp, capac = sdebug_capacity - 1; for (k = 0; k < 8; ++k, capac >>= 8) arr[7 - k] = capac & 0xff; - arr[8] = (SECT_SIZE_PER(target) >> 24) & 0xff; - arr[9] = (SECT_SIZE_PER(target) >> 16) & 0xff; - arr[10] = (SECT_SIZE_PER(target) >> 8) & 0xff; - arr[11] = SECT_SIZE_PER(target) & 0xff; + arr[8] = (scsi_debug_sector_size >> 24) & 0xff; + arr[9] = (scsi_debug_sector_size >> 16) & 0xff; + arr[10] = (scsi_debug_sector_size >> 8) & 0xff; + arr[11] = scsi_debug_sector_size & 0xff; return fill_from_dev_buffer(scp, arr, min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); } @@ -1019,20 +1028,20 @@ static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) static int resp_format_pg(unsigned char * p, int pcontrol, int target) { /* Format device page for mode_sense */ - unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0x40, 0, 0, 0}; - - memcpy(p, format_pg, sizeof(format_pg)); - p[10] = (sdebug_sectors_per >> 8) & 0xff; - p[11] = sdebug_sectors_per & 0xff; - p[12] = (SECT_SIZE >> 8) & 0xff; - p[13] = SECT_SIZE & 0xff; - if (DEV_REMOVEABLE(target)) - p[20] |= 0x20; /* should agree with INQUIRY */ - if (1 == pcontrol) - memset(p + 2, 0, sizeof(format_pg) - 2); - return sizeof(format_pg); + unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0x40, 0, 0, 0}; + + memcpy(p, format_pg, sizeof(format_pg)); + p[10] = (sdebug_sectors_per >> 8) & 0xff; + p[11] = sdebug_sectors_per & 0xff; + p[12] = (scsi_debug_sector_size >> 8) & 0xff; + p[13] = scsi_debug_sector_size & 0xff; + if (DEV_REMOVEABLE(target)) + p[20] |= 0x20; /* should agree with INQUIRY */ + if (1 == pcontrol) + memset(p + 2, 0, sizeof(format_pg) - 2); + return sizeof(format_pg); } static int resp_caching_pg(unsigned char * p, int pcontrol, int target) @@ -1206,8 +1215,8 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, ap[2] = (sdebug_capacity >> 8) & 0xff; ap[3] = sdebug_capacity & 0xff; } - ap[6] = (SECT_SIZE_PER(target) >> 8) & 0xff; - ap[7] = SECT_SIZE_PER(target) & 0xff; + ap[6] = (scsi_debug_sector_size >> 8) & 0xff; + ap[7] = scsi_debug_sector_size & 0xff; offset += bd_len; ap = arr + offset; } else if (16 == bd_len) { @@ -1215,10 +1224,10 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, for (k = 0; k < 8; ++k, capac >>= 8) ap[7 - k] = capac & 0xff; - ap[12] = (SECT_SIZE_PER(target) >> 24) & 0xff; - ap[13] = (SECT_SIZE_PER(target) >> 16) & 0xff; - ap[14] = (SECT_SIZE_PER(target) >> 8) & 0xff; - ap[15] = SECT_SIZE_PER(target) & 0xff; + ap[12] = (scsi_debug_sector_size >> 24) & 0xff; + ap[13] = (scsi_debug_sector_size >> 16) & 0xff; + ap[14] = (scsi_debug_sector_size >> 8) & 0xff; + ap[15] = scsi_debug_sector_size & 0xff; offset += bd_len; ap = arr + offset; } @@ -1519,10 +1528,10 @@ static int do_device_access(struct scsi_cmnd *scmd, if (block + num > sdebug_store_sectors) rest = block + num - sdebug_store_sectors; - ret = func(scmd, fake_storep + (block * SECT_SIZE), - (num - rest) * SECT_SIZE); + ret = func(scmd, fake_storep + (block * scsi_debug_sector_size), + (num - rest) * scsi_debug_sector_size); if (!ret && rest) - ret = func(scmd, fake_storep, rest * SECT_SIZE); + ret = func(scmd, fake_storep, rest * scsi_debug_sector_size); return ret; } @@ -1575,10 +1584,10 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, write_unlock_irqrestore(&atomic_rw, iflags); if (-1 == ret) return (DID_ERROR << 16); - else if ((ret < (num * SECT_SIZE)) && + else if ((ret < (num * scsi_debug_sector_size)) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " - " IO sent=%d bytes\n", num * SECT_SIZE, ret); + " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); return 0; } @@ -2085,6 +2094,7 @@ module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR); module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int, S_IRUGO | S_IWUSR); +module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); MODULE_DESCRIPTION("SCSI debug adapter driver"); @@ -2106,6 +2116,7 @@ MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); +MODULE_PARM_DESC(sector_size, "hardware sector size in bytes (def=512)"); static char sdebug_info[256]; @@ -2158,8 +2169,9 @@ static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **sta scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, scsi_debug_cmnd_count, scsi_debug_delay, scsi_debug_max_luns, scsi_debug_scsi_level, - SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, - num_aborts, num_dev_resets, num_bus_resets, num_host_resets); + scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, + sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, + num_host_resets); if (pos < offset) { len = 0; begin = pos; @@ -2434,6 +2446,12 @@ static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp, DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show, sdebug_vpd_use_hostno_store); +static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf) +{ + return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); +} +DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL); + /* Note: The following function creates attribute files in the /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these files (over those found in the /sys/module/scsi_debug/parameters @@ -2459,11 +2477,13 @@ static int do_create_driverfs_files(void) ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); + ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size); return ret; } static void do_remove_driverfs_files(void) { + driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); @@ -2499,10 +2519,22 @@ static int __init scsi_debug_init(void) int k; int ret; + switch (scsi_debug_sector_size) { + case 512: + case 1024: + case 2048: + case 4096: + break; + default: + printk(KERN_ERR "scsi_debug_init: invalid sector_size %u\n", + scsi_debug_sector_size); + return -EINVAL; + } + if (scsi_debug_dev_size_mb < 1) scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; - sdebug_store_sectors = sz / SECT_SIZE; + sdebug_store_sectors = sz / scsi_debug_sector_size; sdebug_capacity = get_sdebug_capacity(); /* play around with geometry, don't waste too much on track 0 */ diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index eaf5a8a..006a959 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -298,6 +298,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, */ static int scsi_check_sense(struct scsi_cmnd *scmd) { + struct scsi_device *sdev = scmd->device; struct scsi_sense_hdr sshdr; if (! scsi_command_normalize_sense(scmd, &sshdr)) @@ -306,6 +307,16 @@ static int scsi_check_sense(struct scsi_cmnd *scmd) if (scsi_sense_is_deferred(&sshdr)) return NEEDS_RETRY; + if (sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh && + sdev->scsi_dh_data->scsi_dh->check_sense) { + int rc; + + rc = sdev->scsi_dh_data->scsi_dh->check_sense(sdev, &sshdr); + if (rc != SCSI_RETURN_NOT_HANDLED) + return rc; + /* handler does not care. Drop down to default handling */ + } + /* * Previous logic looked for FILEMARK, EOM or ILI which are * mainly associated with tapes and returned SUCCESS. diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index cbf55d5..88d1b5f 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -65,7 +65,7 @@ static struct scsi_host_sg_pool scsi_sg_pools[] = { }; #undef SP -static struct kmem_cache *scsi_bidi_sdb_cache; +static struct kmem_cache *scsi_sdb_cache; static void scsi_run_queue(struct request_queue *q); @@ -784,7 +784,7 @@ void scsi_release_buffers(struct scsi_cmnd *cmd) struct scsi_data_buffer *bidi_sdb = cmd->request->next_rq->special; scsi_free_sgtable(bidi_sdb); - kmem_cache_free(scsi_bidi_sdb_cache, bidi_sdb); + kmem_cache_free(scsi_sdb_cache, bidi_sdb); cmd->request->next_rq->special = NULL; } } @@ -1059,7 +1059,7 @@ int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask) if (blk_bidi_rq(cmd->request)) { struct scsi_data_buffer *bidi_sdb = kmem_cache_zalloc( - scsi_bidi_sdb_cache, GFP_ATOMIC); + scsi_sdb_cache, GFP_ATOMIC); if (!bidi_sdb) { error = BLKPREP_DEFER; goto err_exit; @@ -1169,6 +1169,14 @@ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req) if (ret != BLKPREP_OK) return ret; + + if (unlikely(sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh + && sdev->scsi_dh_data->scsi_dh->prep_fn)) { + ret = sdev->scsi_dh_data->scsi_dh->prep_fn(sdev, req); + if (ret != BLKPREP_OK) + return ret; + } + /* * Filesystem requests must transfer data. */ @@ -1329,7 +1337,6 @@ static inline int scsi_host_queue_ready(struct request_queue *q, printk("scsi%d unblocking host at zero depth\n", shost->host_no)); } else { - blk_plug_device(q); return 0; } } @@ -1693,11 +1700,11 @@ int __init scsi_init_queue(void) return -ENOMEM; } - scsi_bidi_sdb_cache = kmem_cache_create("scsi_bidi_sdb", - sizeof(struct scsi_data_buffer), - 0, 0, NULL); - if (!scsi_bidi_sdb_cache) { - printk(KERN_ERR "SCSI: can't init scsi bidi sdb cache\n"); + scsi_sdb_cache = kmem_cache_create("scsi_data_buffer", + sizeof(struct scsi_data_buffer), + 0, 0, NULL); + if (!scsi_sdb_cache) { + printk(KERN_ERR "SCSI: can't init scsi sdb cache\n"); goto cleanup_io_context; } @@ -1710,7 +1717,7 @@ int __init scsi_init_queue(void) if (!sgp->slab) { printk(KERN_ERR "SCSI: can't init sg slab %s\n", sgp->name); - goto cleanup_bidi_sdb; + goto cleanup_sdb; } sgp->pool = mempool_create_slab_pool(SG_MEMPOOL_SIZE, @@ -1718,13 +1725,13 @@ int __init scsi_init_queue(void) if (!sgp->pool) { printk(KERN_ERR "SCSI: can't init sg mempool %s\n", sgp->name); - goto cleanup_bidi_sdb; + goto cleanup_sdb; } } return 0; -cleanup_bidi_sdb: +cleanup_sdb: for (i = 0; i < SG_MEMPOOL_NR; i++) { struct scsi_host_sg_pool *sgp = scsi_sg_pools + i; if (sgp->pool) @@ -1732,7 +1739,7 @@ cleanup_bidi_sdb: if (sgp->slab) kmem_cache_destroy(sgp->slab); } - kmem_cache_destroy(scsi_bidi_sdb_cache); + kmem_cache_destroy(scsi_sdb_cache); cleanup_io_context: kmem_cache_destroy(scsi_io_context_cache); @@ -1744,7 +1751,7 @@ void scsi_exit_queue(void) int i; kmem_cache_destroy(scsi_io_context_cache); - kmem_cache_destroy(scsi_bidi_sdb_cache); + kmem_cache_destroy(scsi_sdb_cache); for (i = 0; i < SG_MEMPOOL_NR; i++) { struct scsi_host_sg_pool *sgp = scsi_sg_pools + i; diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index a00eee6..196fe3a 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -346,7 +346,7 @@ static void scsi_target_dev_release(struct device *dev) put_device(parent); } -struct device_type scsi_target_type = { +static struct device_type scsi_target_type = { .name = "scsi_target", .release = scsi_target_dev_release, }; diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 93d2b67..b6e5610 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -439,6 +439,7 @@ struct bus_type scsi_bus_type = { .resume = scsi_bus_resume, .remove = scsi_bus_remove, }; +EXPORT_SYMBOL_GPL(scsi_bus_type); int scsi_sysfs_register(void) { diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 65d1737..3af7cbc 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -30,10 +30,11 @@ #include <scsi/scsi_transport_iscsi.h> #include <scsi/iscsi_if.h> -#define ISCSI_SESSION_ATTRS 19 +#define ISCSI_SESSION_ATTRS 21 #define ISCSI_CONN_ATTRS 13 #define ISCSI_HOST_ATTRS 4 -#define ISCSI_TRANSPORT_VERSION "2.0-869" + +#define ISCSI_TRANSPORT_VERSION "2.0-870" struct iscsi_internal { int daemon_pid; @@ -101,16 +102,10 @@ show_transport_##name(struct device *dev, \ static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); show_transport_attr(caps, "0x%x"); -show_transport_attr(max_lun, "%d"); -show_transport_attr(max_conn, "%d"); -show_transport_attr(max_cmd_len, "%d"); static struct attribute *iscsi_transport_attrs[] = { &dev_attr_handle.attr, &dev_attr_caps.attr, - &dev_attr_max_lun.attr, - &dev_attr_max_conn.attr, - &dev_attr_max_cmd_len.attr, NULL, }; @@ -118,18 +113,139 @@ static struct attribute_group iscsi_transport_group = { .attrs = iscsi_transport_attrs, }; +/* + * iSCSI endpoint attrs + */ +#define iscsi_dev_to_endpoint(_dev) \ + container_of(_dev, struct iscsi_endpoint, dev) + +#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ +struct device_attribute dev_attr_##_prefix##_##_name = \ + __ATTR(_name,_mode,_show,_store) + +static void iscsi_endpoint_release(struct device *dev) +{ + struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); + kfree(ep); +} + +static struct class iscsi_endpoint_class = { + .name = "iscsi_endpoint", + .dev_release = iscsi_endpoint_release, +}; + +static ssize_t +show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); + return sprintf(buf, "%u\n", ep->id); +} +static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); + +static struct attribute *iscsi_endpoint_attrs[] = { + &dev_attr_ep_handle.attr, + NULL, +}; + +static struct attribute_group iscsi_endpoint_group = { + .attrs = iscsi_endpoint_attrs, +}; +#define ISCSI_MAX_EPID -1 + +static int iscsi_match_epid(struct device *dev, void *data) +{ + struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); + unsigned int *epid = (unsigned int *) data; + + return *epid == ep->id; +} + +struct iscsi_endpoint * +iscsi_create_endpoint(int dd_size) +{ + struct device *dev; + struct iscsi_endpoint *ep; + unsigned int id; + int err; + + for (id = 1; id < ISCSI_MAX_EPID; id++) { + dev = class_find_device(&iscsi_endpoint_class, &id, + iscsi_match_epid); + if (!dev) + break; + } + if (id == ISCSI_MAX_EPID) { + printk(KERN_ERR "Too many connections. Max supported %u\n", + ISCSI_MAX_EPID - 1); + return NULL; + } + + ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); + if (!ep) + return NULL; + + ep->id = id; + ep->dev.class = &iscsi_endpoint_class; + snprintf(ep->dev.bus_id, BUS_ID_SIZE, "ep-%u", id); + err = device_register(&ep->dev); + if (err) + goto free_ep; + + err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); + if (err) + goto unregister_dev; + + if (dd_size) + ep->dd_data = &ep[1]; + return ep; + +unregister_dev: + device_unregister(&ep->dev); + return NULL; + +free_ep: + kfree(ep); + return NULL; +} +EXPORT_SYMBOL_GPL(iscsi_create_endpoint); + +void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) +{ + sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); + device_unregister(&ep->dev); +} +EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); + +struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) +{ + struct iscsi_endpoint *ep; + struct device *dev; + + dev = class_find_device(&iscsi_endpoint_class, &handle, + iscsi_match_epid); + if (!dev) + return NULL; + + ep = iscsi_dev_to_endpoint(dev); + /* + * we can drop this now because the interface will prevent + * removals and lookups from racing. + */ + put_device(dev); + return ep; +} +EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); static int iscsi_setup_host(struct transport_container *tc, struct device *dev, struct device *cdev) { struct Scsi_Host *shost = dev_to_shost(dev); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; memset(ihost, 0, sizeof(*ihost)); - INIT_LIST_HEAD(&ihost->sessions); - mutex_init(&ihost->mutex); atomic_set(&ihost->nr_scans, 0); + mutex_init(&ihost->mutex); snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d", shost->host_no); @@ -144,7 +260,7 @@ static int iscsi_remove_host(struct transport_container *tc, struct device *dev, struct device *cdev) { struct Scsi_Host *shost = dev_to_shost(dev); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; destroy_workqueue(ihost->scan_workq); return 0; @@ -287,6 +403,24 @@ static int iscsi_is_session_dev(const struct device *dev) return dev->release == iscsi_session_release; } +static int iscsi_iter_session_fn(struct device *dev, void *data) +{ + void (* fn) (struct iscsi_cls_session *) = data; + + if (!iscsi_is_session_dev(dev)) + return 0; + fn(iscsi_dev_to_session(dev)); + return 0; +} + +void iscsi_host_for_each_session(struct Scsi_Host *shost, + void (*fn)(struct iscsi_cls_session *)) +{ + device_for_each_child(&shost->shost_gendev, fn, + iscsi_iter_session_fn); +} +EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); + /** * iscsi_scan_finished - helper to report when running scans are done * @shost: scsi host @@ -297,7 +431,7 @@ static int iscsi_is_session_dev(const struct device *dev) */ int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) { - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; /* * qla4xxx will have kicked off some session unblocks before calling * scsi_scan_host, so just wait for them to complete. @@ -306,42 +440,76 @@ int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) } EXPORT_SYMBOL_GPL(iscsi_scan_finished); -static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, - uint id, uint lun) +struct iscsi_scan_data { + unsigned int channel; + unsigned int id; + unsigned int lun; +}; + +static int iscsi_user_scan_session(struct device *dev, void *data) { - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_scan_data *scan_data = data; struct iscsi_cls_session *session; + struct Scsi_Host *shost; + struct iscsi_cls_host *ihost; + unsigned long flags; + unsigned int id; + + if (!iscsi_is_session_dev(dev)) + return 0; + + session = iscsi_dev_to_session(dev); + shost = iscsi_session_to_shost(session); + ihost = shost->shost_data; mutex_lock(&ihost->mutex); - list_for_each_entry(session, &ihost->sessions, host_list) { - if ((channel == SCAN_WILD_CARD || channel == 0) && - (id == SCAN_WILD_CARD || id == session->target_id)) - scsi_scan_target(&session->dev, 0, - session->target_id, lun, 1); + spin_lock_irqsave(&session->lock, flags); + if (session->state != ISCSI_SESSION_LOGGED_IN) { + spin_unlock_irqrestore(&session->lock, flags); + mutex_unlock(&ihost->mutex); + return 0; } - mutex_unlock(&ihost->mutex); + id = session->target_id; + spin_unlock_irqrestore(&session->lock, flags); + if (id != ISCSI_MAX_TARGET) { + if ((scan_data->channel == SCAN_WILD_CARD || + scan_data->channel == 0) && + (scan_data->id == SCAN_WILD_CARD || + scan_data->id == id)) + scsi_scan_target(&session->dev, 0, id, + scan_data->lun, 1); + } + mutex_unlock(&ihost->mutex); return 0; } +static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, + uint id, uint lun) +{ + struct iscsi_scan_data scan_data; + + scan_data.channel = channel; + scan_data.id = id; + scan_data.lun = lun; + + return device_for_each_child(&shost->shost_gendev, &scan_data, + iscsi_user_scan_session); +} + static void iscsi_scan_session(struct work_struct *work) { struct iscsi_cls_session *session = container_of(work, struct iscsi_cls_session, scan_work); struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; - unsigned long flags; + struct iscsi_cls_host *ihost = shost->shost_data; + struct iscsi_scan_data scan_data; - spin_lock_irqsave(&session->lock, flags); - if (session->state != ISCSI_SESSION_LOGGED_IN) { - spin_unlock_irqrestore(&session->lock, flags); - goto done; - } - spin_unlock_irqrestore(&session->lock, flags); + scan_data.channel = 0; + scan_data.id = SCAN_WILD_CARD; + scan_data.lun = SCAN_WILD_CARD; - scsi_scan_target(&session->dev, 0, session->target_id, - SCAN_WILD_CARD, 1); -done: + iscsi_user_scan_session(&session->dev, &scan_data); atomic_dec(&ihost->nr_scans); } @@ -381,7 +549,7 @@ static void __iscsi_unblock_session(struct work_struct *work) container_of(work, struct iscsi_cls_session, unblock_work); struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; unsigned long flags; /* @@ -449,15 +617,19 @@ static void __iscsi_unbind_session(struct work_struct *work) container_of(work, struct iscsi_cls_session, unbind_work); struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; + unsigned long flags; /* Prevent new scans and make sure scanning is not in progress */ mutex_lock(&ihost->mutex); - if (list_empty(&session->host_list)) { + spin_lock_irqsave(&session->lock, flags); + if (session->target_id == ISCSI_MAX_TARGET) { + spin_unlock_irqrestore(&session->lock, flags); mutex_unlock(&ihost->mutex); return; } - list_del_init(&session->host_list); + session->target_id = ISCSI_MAX_TARGET; + spin_unlock_irqrestore(&session->lock, flags); mutex_unlock(&ihost->mutex); scsi_remove_target(&session->dev); @@ -467,18 +639,18 @@ static void __iscsi_unbind_session(struct work_struct *work) static int iscsi_unbind_session(struct iscsi_cls_session *session) { struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; return queue_work(ihost->scan_workq, &session->unbind_work); } struct iscsi_cls_session * -iscsi_alloc_session(struct Scsi_Host *shost, - struct iscsi_transport *transport) +iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, + int dd_size) { struct iscsi_cls_session *session; - session = kzalloc(sizeof(*session) + transport->sessiondata_size, + session = kzalloc(sizeof(*session) + dd_size, GFP_KERNEL); if (!session) return NULL; @@ -487,7 +659,6 @@ iscsi_alloc_session(struct Scsi_Host *shost, session->recovery_tmo = 120; session->state = ISCSI_SESSION_FREE; INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); - INIT_LIST_HEAD(&session->host_list); INIT_LIST_HEAD(&session->sess_list); INIT_WORK(&session->unblock_work, __iscsi_unblock_session); INIT_WORK(&session->block_work, __iscsi_block_session); @@ -500,22 +671,57 @@ iscsi_alloc_session(struct Scsi_Host *shost, session->dev.parent = &shost->shost_gendev; session->dev.release = iscsi_session_release; device_initialize(&session->dev); - if (transport->sessiondata_size) + if (dd_size) session->dd_data = &session[1]; return session; } EXPORT_SYMBOL_GPL(iscsi_alloc_session); +static int iscsi_get_next_target_id(struct device *dev, void *data) +{ + struct iscsi_cls_session *session; + unsigned long flags; + int err = 0; + + if (!iscsi_is_session_dev(dev)) + return 0; + + session = iscsi_dev_to_session(dev); + spin_lock_irqsave(&session->lock, flags); + if (*((unsigned int *) data) == session->target_id) + err = -EEXIST; + spin_unlock_irqrestore(&session->lock, flags); + return err; +} + int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) { struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost; + struct iscsi_cls_host *ihost; unsigned long flags; + unsigned int id = target_id; int err; ihost = shost->shost_data; session->sid = atomic_add_return(1, &iscsi_session_nr); - session->target_id = target_id; + + if (id == ISCSI_MAX_TARGET) { + for (id = 0; id < ISCSI_MAX_TARGET; id++) { + err = device_for_each_child(&shost->shost_gendev, &id, + iscsi_get_next_target_id); + if (!err) + break; + } + + if (id == ISCSI_MAX_TARGET) { + iscsi_cls_session_printk(KERN_ERR, session, + "Too many iscsi targets. Max " + "number of targets is %d.\n", + ISCSI_MAX_TARGET - 1); + goto release_host; + } + } + session->target_id = id; snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", session->sid); @@ -531,10 +737,6 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) list_add(&session->sess_list, &sesslist); spin_unlock_irqrestore(&sesslock, flags); - mutex_lock(&ihost->mutex); - list_add(&session->host_list, &ihost->sessions); - mutex_unlock(&ihost->mutex); - iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); return 0; @@ -548,18 +750,18 @@ EXPORT_SYMBOL_GPL(iscsi_add_session); * iscsi_create_session - create iscsi class session * @shost: scsi host * @transport: iscsi transport + * @dd_size: private driver data size * @target_id: which target * * This can be called from a LLD or iscsi_transport. */ struct iscsi_cls_session * -iscsi_create_session(struct Scsi_Host *shost, - struct iscsi_transport *transport, - unsigned int target_id) +iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, + int dd_size, unsigned int target_id) { struct iscsi_cls_session *session; - session = iscsi_alloc_session(shost, transport); + session = iscsi_alloc_session(shost, transport, dd_size); if (!session) return NULL; @@ -595,7 +797,7 @@ static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) void iscsi_remove_session(struct iscsi_cls_session *session) { struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; unsigned long flags; int err; @@ -661,6 +863,7 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session); /** * iscsi_create_conn - create iscsi class connection * @session: iscsi cls session + * @dd_size: private driver data size * @cid: connection id * * This can be called from a LLD or iscsi_transport. The connection @@ -673,18 +876,17 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session); * non-zero. */ struct iscsi_cls_conn * -iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) +iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) { struct iscsi_transport *transport = session->transport; struct iscsi_cls_conn *conn; unsigned long flags; int err; - conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); + conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); if (!conn) return NULL; - - if (transport->conndata_size) + if (dd_size) conn->dd_data = &conn[1]; INIT_LIST_HEAD(&conn->conn_list); @@ -1017,21 +1219,20 @@ int iscsi_session_event(struct iscsi_cls_session *session, EXPORT_SYMBOL_GPL(iscsi_session_event); static int -iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) +iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, + struct iscsi_uevent *ev, uint32_t initial_cmdsn, + uint16_t cmds_max, uint16_t queue_depth) { struct iscsi_transport *transport = priv->iscsi_transport; struct iscsi_cls_session *session; - uint32_t hostno; + uint32_t host_no; - session = transport->create_session(transport, &priv->t, - ev->u.c_session.cmds_max, - ev->u.c_session.queue_depth, - ev->u.c_session.initial_cmdsn, - &hostno); + session = transport->create_session(ep, cmds_max, queue_depth, + initial_cmdsn, &host_no); if (!session) return -ENOMEM; - ev->r.c_session_ret.host_no = hostno; + ev->r.c_session_ret.host_no = host_no; ev->r.c_session_ret.sid = session->sid; return 0; } @@ -1106,6 +1307,7 @@ static int iscsi_if_transport_ep(struct iscsi_transport *transport, struct iscsi_uevent *ev, int msg_type) { + struct iscsi_endpoint *ep; struct sockaddr *dst_addr; int rc = 0; @@ -1115,22 +1317,33 @@ iscsi_if_transport_ep(struct iscsi_transport *transport, return -EINVAL; dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); - rc = transport->ep_connect(dst_addr, - ev->u.ep_connect.non_blocking, - &ev->r.ep_connect_ret.handle); + ep = transport->ep_connect(dst_addr, + ev->u.ep_connect.non_blocking); + if (IS_ERR(ep)) + return PTR_ERR(ep); + + ev->r.ep_connect_ret.handle = ep->id; break; case ISCSI_UEVENT_TRANSPORT_EP_POLL: if (!transport->ep_poll) return -EINVAL; - ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, + ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); + if (!ep) + return -EINVAL; + + ev->r.retcode = transport->ep_poll(ep, ev->u.ep_poll.timeout_ms); break; case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: if (!transport->ep_disconnect) return -EINVAL; - transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); + ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle); + if (!ep) + return -EINVAL; + + transport->ep_disconnect(ep); break; } return rc; @@ -1195,6 +1408,7 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) struct iscsi_internal *priv; struct iscsi_cls_session *session; struct iscsi_cls_conn *conn; + struct iscsi_endpoint *ep = NULL; priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); if (!priv) @@ -1208,7 +1422,22 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) switch (nlh->nlmsg_type) { case ISCSI_UEVENT_CREATE_SESSION: - err = iscsi_if_create_session(priv, ev); + err = iscsi_if_create_session(priv, ep, ev, + ev->u.c_session.initial_cmdsn, + ev->u.c_session.cmds_max, + ev->u.c_session.queue_depth); + break; + case ISCSI_UEVENT_CREATE_BOUND_SESSION: + ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); + if (!ep) { + err = -EINVAL; + break; + } + + err = iscsi_if_create_session(priv, ep, ev, + ev->u.c_bound_session.initial_cmdsn, + ev->u.c_bound_session.cmds_max, + ev->u.c_bound_session.queue_depth); break; case ISCSI_UEVENT_DESTROY_SESSION: session = iscsi_session_lookup(ev->u.d_session.sid); @@ -1414,6 +1643,8 @@ iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); +iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); +iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0) static ssize_t show_priv_session_state(struct device *dev, struct device_attribute *attr, @@ -1580,6 +1811,8 @@ iscsi_register_transport(struct iscsi_transport *tt) priv->daemon_pid = -1; priv->iscsi_transport = tt; priv->t.user_scan = iscsi_user_scan; + if (!(tt->caps & CAP_DATA_PATH_OFFLOAD)) + priv->t.create_work_queue = 1; priv->dev.class = &iscsi_transport_class; snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); @@ -1595,7 +1828,7 @@ iscsi_register_transport(struct iscsi_transport *tt) priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; priv->t.host_attrs.ac.class = &iscsi_host_class.class; priv->t.host_attrs.ac.match = iscsi_host_match; - priv->t.host_size = sizeof(struct iscsi_host); + priv->t.host_size = sizeof(struct iscsi_cls_host); transport_container_register(&priv->t.host_attrs); SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); @@ -1653,6 +1886,8 @@ iscsi_register_transport(struct iscsi_transport *tt) SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); + SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME); + SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME); SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); SETUP_PRIV_SESSION_RD_ATTR(state); @@ -1668,6 +1903,7 @@ iscsi_register_transport(struct iscsi_transport *tt) unregister_dev: device_unregister(&priv->dev); + return NULL; free_priv: kfree(priv); return NULL; @@ -1715,10 +1951,14 @@ static __init int iscsi_transport_init(void) if (err) return err; - err = transport_class_register(&iscsi_host_class); + err = class_register(&iscsi_endpoint_class); if (err) goto unregister_transport_class; + err = transport_class_register(&iscsi_host_class); + if (err) + goto unregister_endpoint_class; + err = transport_class_register(&iscsi_connection_class); if (err) goto unregister_host_class; @@ -1727,8 +1967,8 @@ static __init int iscsi_transport_init(void) if (err) goto unregister_conn_class; - nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, - THIS_MODULE); + nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, + NULL, THIS_MODULE); if (!nls) { err = -ENOBUFS; goto unregister_session_class; @@ -1748,6 +1988,8 @@ unregister_conn_class: transport_class_unregister(&iscsi_connection_class); unregister_host_class: transport_class_unregister(&iscsi_host_class); +unregister_endpoint_class: + class_unregister(&iscsi_endpoint_class); unregister_transport_class: class_unregister(&iscsi_transport_class); return err; @@ -1760,6 +2002,7 @@ static void __exit iscsi_transport_exit(void) transport_class_unregister(&iscsi_connection_class); transport_class_unregister(&iscsi_session_class); transport_class_unregister(&iscsi_host_class); + class_unregister(&iscsi_endpoint_class); class_unregister(&iscsi_transport_class); } diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index d53312c..0c63947 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -58,8 +58,8 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_ioctl.h> #include <scsi/scsicam.h> -#include <scsi/sd.h> +#include "sd.h" #include "scsi_logging.h" MODULE_AUTHOR("Eric Youngdale"); @@ -295,11 +295,6 @@ static int sd_major(int major_idx) } } -static inline struct scsi_disk *scsi_disk(struct gendisk *disk) -{ - return container_of(disk->private_data, struct scsi_disk, driver); -} - static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) { struct scsi_disk *sdkp = NULL; diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h new file mode 100644 index 0000000..03a3d45 --- /dev/null +++ b/drivers/scsi/sd.h @@ -0,0 +1,62 @@ +#ifndef _SCSI_DISK_H +#define _SCSI_DISK_H + +/* + * More than enough for everybody ;) The huge number of majors + * is a leftover from 16bit dev_t days, we don't really need that + * much numberspace. + */ +#define SD_MAJORS 16 + +/* + * This is limited by the naming scheme enforced in sd_probe, + * add another character to it if you really need more disks. + */ +#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26) + +/* + * Time out in seconds for disks and Magneto-opticals (which are slower). + */ +#define SD_TIMEOUT (30 * HZ) +#define SD_MOD_TIMEOUT (75 * HZ) + +/* + * Number of allowed retries + */ +#define SD_MAX_RETRIES 5 +#define SD_PASSTHROUGH_RETRIES 1 + +/* + * Size of the initial data buffer for mode and read capacity data + */ +#define SD_BUF_SIZE 512 + +struct scsi_disk { + struct scsi_driver *driver; /* always &sd_template */ + struct scsi_device *device; + struct device dev; + struct gendisk *disk; + unsigned int openers; /* protected by BKL for now, yuck */ + sector_t capacity; /* size in 512-byte sectors */ + u32 index; + u8 media_present; + u8 write_prot; + unsigned previous_state : 1; + unsigned WCE : 1; /* state of disk WCE bit */ + unsigned RCD : 1; /* state of disk RCD bit, unused */ + unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ +}; +#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) + +static inline struct scsi_disk *scsi_disk(struct gendisk *disk) +{ + return container_of(disk->private_data, struct scsi_disk, driver); +} + +#define sd_printk(prefix, sdsk, fmt, a...) \ + (sdsk)->disk ? \ + sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ + (sdsk)->disk->disk_name, ##a) : \ + sdev_printk(prefix, (sdsk)->device, fmt, ##a) + +#endif /* _SCSI_DISK_H */ diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index fccd2e8..d3b8ebb 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1036,6 +1036,9 @@ sg_ioctl(struct inode *inode, struct file *filp, case SG_SCSI_RESET_DEVICE: val = SCSI_TRY_RESET_DEVICE; break; + case SG_SCSI_RESET_TARGET: + val = SCSI_TRY_RESET_TARGET; + break; case SG_SCSI_RESET_BUS: val = SCSI_TRY_RESET_BUS; break; diff --git a/drivers/scsi/sym53c8xx_2/sym_misc.h b/drivers/scsi/sym53c8xx_2/sym_misc.h index 0433d5d..4305371 100644 --- a/drivers/scsi/sym53c8xx_2/sym_misc.h +++ b/drivers/scsi/sym53c8xx_2/sym_misc.h @@ -121,9 +121,7 @@ static __inline void sym_que_move(struct sym_quehead *orig, } } -#define sym_que_entry(ptr, type, member) \ - ((type *)((char *)(ptr)-(unsigned int)(&((type *)0)->member))) - +#define sym_que_entry(ptr, type, member) container_of(ptr, type, member) #define sym_insque(new, pos) __sym_que_add(new, pos, (pos)->flink) |
