diff options
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_os.c')
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_os.c | 1755 |
1 files changed, 1755 insertions, 0 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c new file mode 100644 index 0000000..5036ebf --- /dev/null +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -0,0 +1,1755 @@ +/* + * QLogic iSCSI HBA Driver + * Copyright (c) 2003-2006 QLogic Corporation + * + * See LICENSE.qla4xxx for copyright and licensing details. + */ +#include <linux/moduleparam.h> + +#include <scsi/scsi_tcq.h> +#include <scsi/scsicam.h> + +#include "ql4_def.h" + +/* + * Driver version + */ +char qla4xxx_version_str[40]; + +/* + * SRB allocation cache + */ +static kmem_cache_t *srb_cachep; + +/* + * Module parameter information and variables + */ +int ql4xdiscoverywait = 60; +module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR); +MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time"); +int ql4xdontresethba = 0; +module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR); +MODULE_PARM_DESC(ql4xdontresethba, + "Dont reset the HBA when the driver gets 0x8002 AEN " + " default it will reset hba :0" + " set to 1 to avoid resetting HBA"); + +int extended_error_logging = 0; /* 0 = off, 1 = log errors */ +module_param(extended_error_logging, int, S_IRUGO | S_IRUSR); +MODULE_PARM_DESC(extended_error_logging, + "Option to enable extended error logging, " + "Default is 0 - no logging, 1 - debug logging"); + +/* + * SCSI host template entry points + */ + +void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha); + +/* + * iSCSI template entry points + */ +static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no, + uint32_t enable, struct sockaddr *dst_addr); +static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, + enum iscsi_param param, char *buf); +static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, + enum iscsi_param param, char *buf); +static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag); +static int qla4xxx_conn_start(struct iscsi_cls_conn *conn); +static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session); + +/* + * SCSI host template entry points + */ +static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, + void (*done) (struct scsi_cmnd *)); +static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd); +static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd); +static int qla4xxx_slave_alloc(struct scsi_device *device); +static int qla4xxx_slave_configure(struct scsi_device *device); +static void qla4xxx_slave_destroy(struct scsi_device *sdev); + +static struct scsi_host_template qla4xxx_driver_template = { + .module = THIS_MODULE, + .name = DRIVER_NAME, + .proc_name = DRIVER_NAME, + .queuecommand = qla4xxx_queuecommand, + + .eh_device_reset_handler = qla4xxx_eh_device_reset, + .eh_host_reset_handler = qla4xxx_eh_host_reset, + + .slave_configure = qla4xxx_slave_configure, + .slave_alloc = qla4xxx_slave_alloc, + .slave_destroy = qla4xxx_slave_destroy, + + .this_id = -1, + .cmd_per_lun = 3, + .use_clustering = ENABLE_CLUSTERING, + .sg_tablesize = SG_ALL, + + .max_sectors = 0xFFFF, +}; + +static struct iscsi_transport qla4xxx_iscsi_transport = { + .owner = THIS_MODULE, + .name = DRIVER_NAME, + .param_mask = ISCSI_CONN_PORT | + ISCSI_CONN_ADDRESS | + ISCSI_TARGET_NAME | + ISCSI_TPGT, + .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, + .start_conn = qla4xxx_conn_start, + .stop_conn = qla4xxx_conn_stop, + .session_recovery_timedout = qla4xxx_recovery_timedout, +}; + +static struct scsi_transport_template *qla4xxx_scsi_transport; + +static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session) +{ + struct ddb_entry *ddb_entry = session->dd_data; + struct scsi_qla_host *ha = ddb_entry->ha; + + DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) " + "secs exhausted, marking device DEAD.\n", ha->host_no, + __func__, ddb_entry->fw_ddb_index, + ha->port_down_retry_count)); + + atomic_set(&ddb_entry->state, DDB_STATE_DEAD); + + DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = " + "0x%lx\n", ha->host_no, __func__, ha->dpc_flags)); + queue_work(ha->dpc_thread, &ha->dpc_work); +} + +static int qla4xxx_conn_start(struct iscsi_cls_conn *conn) +{ + struct iscsi_cls_session *session; + struct ddb_entry *ddb_entry; + + session = iscsi_dev_to_session(conn->dev.parent); + ddb_entry = session->dd_data; + + DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n", + ddb_entry->ha->host_no, __func__, + ddb_entry->fw_ddb_index)); + iscsi_unblock_session(session); + return 0; +} + +static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag) +{ + struct iscsi_cls_session *session; + struct ddb_entry *ddb_entry; + + session = iscsi_dev_to_session(conn->dev.parent); + ddb_entry = session->dd_data; + + DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n", + ddb_entry->ha->host_no, __func__, + ddb_entry->fw_ddb_index)); + if (flag == STOP_CONN_RECOVER) + iscsi_block_session(session); + else + printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag); +} + +static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, + enum iscsi_param param, char *buf) +{ + struct ddb_entry *ddb_entry = sess->dd_data; + int len; + + switch (param) { + case ISCSI_PARAM_TARGET_NAME: + len = snprintf(buf, PAGE_SIZE - 1, "%s\n", + ddb_entry->iscsi_name); + break; + case ISCSI_PARAM_TPGT: + len = sprintf(buf, "%u\n", ddb_entry->tpgt); + break; + default: + return -ENOSYS; + } + + return len; +} + +static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, + enum iscsi_param param, char *buf) +{ + struct iscsi_cls_session *session; + struct ddb_entry *ddb_entry; + int len; + + session = iscsi_dev_to_session(conn->dev.parent); + ddb_entry = session->dd_data; + + switch (param) { + case ISCSI_PARAM_CONN_PORT: + len = sprintf(buf, "%hu\n", ddb_entry->port); + break; + case ISCSI_PARAM_CONN_ADDRESS: + /* TODO: what are the ipv6 bits */ + len = sprintf(buf, "%u.%u.%u.%u\n", + NIPQUAD(ddb_entry->ip_addr)); + break; + default: + return -ENOSYS; + } + + return len; +} + +static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no, + uint32_t enable, struct sockaddr *dst_addr) +{ + struct scsi_qla_host *ha; + struct Scsi_Host *shost; + struct sockaddr_in *addr; + struct sockaddr_in6 *addr6; + int ret = 0; + + shost = scsi_host_lookup(host_no); + if (IS_ERR(shost)) { + printk(KERN_ERR "Could not find host no %u\n", host_no); + return -ENODEV; + } + + ha = (struct scsi_qla_host *) shost->hostdata; + + switch (type) { + case ISCSI_TGT_DSCVR_SEND_TARGETS: + if (dst_addr->sa_family == AF_INET) { + addr = (struct sockaddr_in *)dst_addr; + if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr, + addr->sin_port) != QLA_SUCCESS) + ret = -EIO; + } else if (dst_addr->sa_family == AF_INET6) { + /* + * TODO: fix qla4xxx_send_tgts + */ + addr6 = (struct sockaddr_in6 *)dst_addr; + if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr, + addr6->sin6_port) != QLA_SUCCESS) + ret = -EIO; + } else + ret = -ENOSYS; + break; + default: + ret = -ENOSYS; + } + + scsi_host_put(shost); + return ret; +} + +void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) +{ + if (!ddb_entry->sess) + return; + + if (ddb_entry->conn) { + iscsi_if_destroy_session_done(ddb_entry->conn); + iscsi_destroy_conn(ddb_entry->conn); + iscsi_remove_session(ddb_entry->sess); + } + iscsi_free_session(ddb_entry->sess); +} + +int qla4xxx_add_sess(struct ddb_entry *ddb_entry) +{ + int err; + + err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); + if (err) { + DEBUG2(printk(KERN_ERR "Could not add session.\n")); + return err; + } + + ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0); + if (!ddb_entry->conn) { + iscsi_remove_session(ddb_entry->sess); + DEBUG2(printk(KERN_ERR "Could not add connection.\n")); + return -ENOMEM; + } + + ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; + iscsi_if_create_session_done(ddb_entry->conn); + return 0; +} + +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); + if (!sess) + return NULL; + + ddb_entry = sess->dd_data; + memset(ddb_entry, 0, sizeof(*ddb_entry)); + ddb_entry->ha = ha; + ddb_entry->sess = sess; + return ddb_entry; +} + +/* + * Timer routines + */ + +static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func, + unsigned long interval) +{ + DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n", + __func__, ha->host->host_no)); + init_timer(&ha->timer); + ha->timer.expires = jiffies + interval * HZ; + ha->timer.data = (unsigned long)ha; + ha->timer.function = (void (*)(unsigned long))func; + add_timer(&ha->timer); + ha->timer_active = 1; +} + +static void qla4xxx_stop_timer(struct scsi_qla_host *ha) +{ + del_timer_sync(&ha->timer); + ha->timer_active = 0; +} + +/*** + * qla4xxx_mark_device_missing - mark a device as missing. + * @ha: Pointer to host adapter structure. + * @ddb_entry: Pointer to device database entry + * + * This routine marks a device missing and resets the relogin retry count. + **/ +void qla4xxx_mark_device_missing(struct scsi_qla_host *ha, + struct ddb_entry *ddb_entry) +{ + atomic_set(&ddb_entry->state, DDB_STATE_MISSING); + DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n", + ha->host_no, ddb_entry->bus, ddb_entry->target, + ddb_entry->fw_ddb_index)); + iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED); +} + +static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha, + struct ddb_entry *ddb_entry, + struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *)) +{ + struct srb *srb; + + srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC); + if (!srb) + return srb; + + atomic_set(&srb->ref_count, 1); + srb->ha = ha; + srb->ddb = ddb_entry; + srb->cmd = cmd; + srb->flags = 0; + cmd->SCp.ptr = (void *)srb; + cmd->scsi_done = done; + + return srb; +} + +static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb) +{ + struct scsi_cmnd *cmd = srb->cmd; + + if (srb->flags & SRB_DMA_VALID) { + if (cmd->use_sg) { + pci_unmap_sg(ha->pdev, cmd->request_buffer, + cmd->use_sg, cmd->sc_data_direction); + } else if (cmd->request_bufflen) { + pci_unmap_single(ha->pdev, srb->dma_handle, + cmd->request_bufflen, + cmd->sc_data_direction); + } + srb->flags &= ~SRB_DMA_VALID; + } + cmd->SCp.ptr = NULL; +} + +void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb) +{ + struct scsi_cmnd *cmd = srb->cmd; + + qla4xxx_srb_free_dma(ha, srb); + + mempool_free(srb, ha->srb_mempool); + + cmd->scsi_done(cmd); +} + +/** + * qla4xxx_queuecommand - scsi layer issues scsi command to driver. + * @cmd: Pointer to Linux's SCSI command structure + * @done_fn: Function that the driver calls to notify the SCSI mid-layer + * that the command has been processed. + * + * Remarks: + * This routine is invoked by Linux to send a SCSI command to the driver. + * The mid-level driver tries to ensure that queuecommand never gets + * invoked concurrently with itself or the interrupt handler (although + * the interrupt handler may call this routine as part of request- + * completion handling). Unfortunely, it sometimes calls the scheduler + * in interrupt context which is a big NO! NO!. + **/ +static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *)) +{ + struct scsi_qla_host *ha = to_qla_host(cmd->device->host); + struct ddb_entry *ddb_entry = cmd->device->hostdata; + struct srb *srb; + int rval; + + if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { + if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) { + cmd->result = DID_NO_CONNECT << 16; + goto qc_fail_command; + } + goto qc_host_busy; + } + + spin_unlock_irq(ha->host->host_lock); + + srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done); + if (!srb) + goto qc_host_busy_lock; + + rval = qla4xxx_send_command_to_isp(ha, srb); + if (rval != QLA_SUCCESS) + goto qc_host_busy_free_sp; + + spin_lock_irq(ha->host->host_lock); + return 0; + +qc_host_busy_free_sp: + qla4xxx_srb_free_dma(ha, srb); + mempool_free(srb, ha->srb_mempool); + +qc_host_busy_lock: + spin_lock_irq(ha->host->host_lock); + +qc_host_busy: + return SCSI_MLQUEUE_HOST_BUSY; + +qc_fail_command: + done(cmd); + + return 0; +} + +/** + * qla4xxx_mem_free - frees memory allocated to adapter + * @ha: Pointer to host adapter structure. + * + * Frees memory previously allocated by qla4xxx_mem_alloc + **/ +static void qla4xxx_mem_free(struct scsi_qla_host *ha) +{ + if (ha->queues) + dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues, + ha->queues_dma); + + ha->queues_len = 0; + ha->queues = NULL; + ha->queues_dma = 0; + ha->request_ring = NULL; + ha->request_dma = 0; + ha->response_ring = NULL; + ha->response_dma = 0; + ha->shadow_regs = NULL; + ha->shadow_regs_dma = 0; + + /* Free srb pool. */ + if (ha->srb_mempool) + mempool_destroy(ha->srb_mempool); + + ha->srb_mempool = NULL; + + /* release io space registers */ + if (ha->reg) + iounmap(ha->reg); + pci_release_regions(ha->pdev); +} + +/** + * qla4xxx_mem_alloc - allocates memory for use by adapter. + * @ha: Pointer to host adapter structure + * + * Allocates DMA memory for request and response queues. Also allocates memory + * for srbs. + **/ +static int qla4xxx_mem_alloc(struct scsi_qla_host *ha) +{ + unsigned long align; + + /* Allocate contiguous block of DMA memory for queues. */ + ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + + (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) + + sizeof(struct shadow_regs) + + MEM_ALIGN_VALUE + + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); + ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len, + &ha->queues_dma, GFP_KERNEL); + if (ha->queues == NULL) { + dev_warn(&ha->pdev->dev, + "Memory Allocation failed - queues.\n"); + + goto mem_alloc_error_exit; + } + memset(ha->queues, 0, ha->queues_len); + + /* + * As per RISC alignment requirements -- the bus-address must be a + * multiple of the request-ring size (in bytes). + */ + align = 0; + if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)) + align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma & + (MEM_ALIGN_VALUE - 1)); + + /* Update request and response queue pointers. */ + ha->request_dma = ha->queues_dma + align; + ha->request_ring = (struct queue_entry *) (ha->queues + align); + ha->response_dma = ha->queues_dma + align + + (REQUEST_QUEUE_DEPTH * QUEUE_SIZE); + ha->response_ring = (struct queue_entry *) (ha->queues + align + + (REQUEST_QUEUE_DEPTH * + QUEUE_SIZE)); + ha->shadow_regs_dma = ha->queues_dma + align + + (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + + (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE); + ha->shadow_regs = (struct shadow_regs *) (ha->queues + align + + (REQUEST_QUEUE_DEPTH * + QUEUE_SIZE) + + (RESPONSE_QUEUE_DEPTH * + QUEUE_SIZE)); + + /* Allocate memory for srb pool. */ + ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab, + mempool_free_slab, srb_cachep); + if (ha->srb_mempool == NULL) { + dev_warn(&ha->pdev->dev, + "Memory Allocation failed - SRB Pool.\n"); + + goto mem_alloc_error_exit; + } + + return QLA_SUCCESS; + +mem_alloc_error_exit: + qla4xxx_mem_free(ha); + return QLA_ERROR; +} + +/** + * qla4xxx_timer - checks every second for work to do. + * @ha: Pointer to host adapter structure. + **/ +static void qla4xxx_timer(struct scsi_qla_host *ha) +{ + struct ddb_entry *ddb_entry, *dtemp; + int start_dpc = 0; + + /* Search for relogin's to time-out and port down retry. */ + list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { + /* Count down time between sending relogins */ + if (adapter_up(ha) && + !test_bit(DF_RELOGIN, &ddb_entry->flags) && + atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { + if (atomic_read(&ddb_entry->retry_relogin_timer) != + INVALID_ENTRY) { + if (atomic_read(&ddb_entry->retry_relogin_timer) + == 0) { + atomic_set(&ddb_entry-> + retry_relogin_timer, + INVALID_ENTRY); + set_bit(DPC_RELOGIN_DEVICE, + &ha->dpc_flags); + set_bit(DF_RELOGIN, &ddb_entry->flags); + DEBUG2(printk("scsi%ld: %s: index [%d]" + " login device\n", + ha->host_no, __func__, + ddb_entry->fw_ddb_index)); + } else + atomic_dec(&ddb_entry-> + retry_relogin_timer); + } + } + + /* Wait for relogin to timeout */ + if (atomic_read(&ddb_entry->relogin_timer) && + (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) { + /* + * If the relogin times out and the device is + * still NOT ONLINE then try and relogin again. + */ + if (atomic_read(&ddb_entry->state) != + DDB_STATE_ONLINE && + ddb_entry->fw_ddb_device_state == + DDB_DS_SESSION_FAILED) { + /* Reset retry relogin timer */ + atomic_inc(&ddb_entry->relogin_retry_count); + DEBUG2(printk("scsi%ld: index[%d] relogin" + " timed out-retrying" + " relogin (%d)\n", + ha->host_no, + ddb_entry->fw_ddb_index, + atomic_read(&ddb_entry-> + relogin_retry_count)) + ); + start_dpc++; + DEBUG(printk("scsi%ld:%d:%d: index [%d] " + "initate relogin after" + " %d seconds\n", + ha->host_no, ddb_entry->bus, + ddb_entry->target, + ddb_entry->fw_ddb_index, + ddb_entry->default_time2wait + 4) + ); + + atomic_set(&ddb_entry->retry_relogin_timer, + ddb_entry->default_time2wait + 4); + } + } + } + + /* Check for heartbeat interval. */ + if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE && + ha->heartbeat_interval != 0) { + ha->seconds_since_last_heartbeat++; + if (ha->seconds_since_last_heartbeat > + ha->heartbeat_interval + 2) + set_bit(DPC_RESET_HA, &ha->dpc_flags); + } + + + /* Wakeup the dpc routine for this adapter, if needed. */ + if ((start_dpc || + test_bit(DPC_RESET_HA, &ha->dpc_flags) || + test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || + test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) || + test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || + test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || + test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || + test_bit(DPC_AEN, &ha->dpc_flags)) && + ha->dpc_thread) { + DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" + " - dpc flags = 0x%lx\n", + ha->host_no, __func__, ha->dpc_flags)); + queue_work(ha->dpc_thread, &ha->dpc_work); + } + + /* Reschedule timer thread to call us back in one second */ + mod_timer(&ha->timer, jiffies + HZ); + + DEBUG2(ha->seconds_since_last_intr++); +} + +/** + * qla4xxx_cmd_wait - waits for all outstanding commands to complete + * @ha: Pointer to host adapter structure. + * + * This routine stalls the driver until all outstanding commands are returned. + * Caller must release the Hardware Lock prior to calling this routine. + **/ +static int qla4xxx_cmd_wait(struct scsi_qla_host *ha) +{ + uint32_t index = 0; + int stat = QLA_SUCCESS; + unsigned long flags; + struct scsi_cmnd *cmd; + int wait_cnt = WAIT_CMD_TOV; /* + * Initialized for 30 seconds as we + * expect all commands to retuned + * ASAP. + */ + + while (wait_cnt) { + spin_lock_irqsave(&ha->hardware_lock, flags); + /* Find a command that hasn't completed. */ + for (index = 0; index < ha->host->can_queue; index++) { + cmd = scsi_host_find_tag(ha->host, index); + if (cmd != NULL) + break; + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + /* If No Commands are pending, wait is complete */ + if (index == ha->host->can_queue) { + break; + } + + /* If we timed out on waiting for commands to come back + * return ERROR. + */ + wait_cnt--; + if (wait_cnt == 0) + stat = QLA_ERROR; + else { + msleep(1000); + } + } /* End of While (wait_cnt) */ + + return stat; +} + +/** + * qla4010_soft_reset - performs soft reset. + * @ha: Pointer to host adapter structure. + **/ +static int qla4010_soft_reset(struct scsi_qla_host *ha) +{ + uint32_t max_wait_time; + unsigned long flags = 0; + int status = QLA_ERROR; + uint32_t ctrl_status; + + spin_lock_irqsave(&ha->hardware_lock, flags); + + /* + * If the SCSI Reset Interrupt bit is set, clear it. + * Otherwise, the Soft Reset won't work. + */ + ctrl_status = readw(&ha->reg->ctrl_status); + if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) + writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); + + /* Issue Soft Reset */ + writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); + readl(&ha->reg->ctrl_status); + + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + /* Wait until the Network Reset Intr bit is cleared */ + max_wait_time = RESET_INTR_TOV; + do { + spin_lock_irqsave(&ha->hardware_lock, flags); + ctrl_status = readw(&ha->reg->ctrl_status); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + if ((ctrl_status & CSR_NET_RESET_INTR) == 0) + break; + + msleep(1000); + } while ((--max_wait_time)); + + if ((ctrl_status & CSR_NET_RESET_INTR) != 0) { + DEBUG2(printk(KERN_WARNING + "scsi%ld: Network Reset Intr not cleared by " + "Network function, clearing it now!\n", + ha->host_no)); + spin_lock_irqsave(&ha->hardware_lock, flags); + writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status); + readl(&ha->reg->ctrl_status); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + } + + /* Wait until the firmware tells us the Soft Reset is done */ + max_wait_time = SOFT_RESET_TOV; + do { + spin_lock_irqsave(&ha->hardware_lock, flags); + ctrl_status = readw(&ha->reg->ctrl_status); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + if ((ctrl_status & CSR_SOFT_RESET) == 0) { + status = QLA_SUCCESS; + break; + } + + msleep(1000); + } while ((--max_wait_time)); + + /* + * Also, make sure that the SCSI Reset Interrupt bit has been cleared + * after the soft reset has taken place. + */ + spin_lock_irqsave(&ha->hardware_lock, flags); + ctrl_status = readw(&ha->reg->ctrl_status); + if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) { + writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); + readl(&ha->reg->ctrl_status); + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + /* If soft reset fails then most probably the bios on other + * function is also enabled. + * Since the initialization is sequential the other fn + * wont be able to acknowledge the soft reset. + * Issue a force soft reset to workaround this scenario. + */ + if (max_wait_time == 0) { + /* Issue Force Soft Reset */ + spin_lock_irqsave(&ha->hardware_lock, flags); + writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status); + readl(&ha->reg->ctrl_status); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + /* Wait until the firmware tells us the Soft Reset is done */ + max_wait_time = SOFT_RESET_TOV; + do { + spin_lock_irqsave(&ha->hardware_lock, flags); + ctrl_status = readw(&ha->reg->ctrl_status); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) { + status = QLA_SUCCESS; + break; + } + + msleep(1000); + } while ((--max_wait_time)); + } + + return status; +} + +/** + * qla4xxx_topcat_reset - performs hard reset of TopCat Chip. + * @ha: Pointer to host adapter structure. + **/ +static int qla4xxx_topcat_reset(struct scsi_qla_host *ha) +{ + unsigned long flags; + + ql4xxx_lock_nvram(ha); + spin_lock_irqsave(&ha->hardware_lock, flags); + writel(set_rmask(GPOR_TOPCAT_RESET), isp_gp_out(ha)); + readl(isp_gp_out(ha)); + mdelay(1); + + writel(clr_rmask(GPOR_TOPCAT_RESET), isp_gp_out(ha)); + readl(isp_gp_out(ha)); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + mdelay(2523); + + ql4xxx_unlock_nvram(ha); + return QLA_SUCCESS; +} + +/** + * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S. + * @ha: Pointer to host adapter structure. + * + * This routine is called just prior to a HARD RESET to return all + * outstanding commands back to the Operating System. + * Caller should make sure that the following locks are released + * before this calling routine: Hardware lock, and io_request_lock. + **/ +static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha) +{ + struct srb *srb; + int i; + unsigned long flags; + + spin_lock_irqsave(&ha->hardware_lock, flags); + for (i = 0; i < ha->host->can_queue; i++) { + srb = qla4xxx_del_from_active_array(ha, i); + if (srb != NULL) { + srb->cmd->result = DID_RESET << 16; + qla4xxx_srb_compl(ha, srb); + } + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); + +} + +/** + * qla4xxx_hard_reset - performs HBA Hard Reset + * @ha: Pointer to host adapter structure. + **/ +static int qla4xxx_hard_reset(struct scsi_qla_host *ha) +{ + /* The QLA4010 really doesn't have an equivalent to a hard reset */ + qla4xxx_flush_active_srbs(ha); + if (test_bit(AF_TOPCAT_CHIP_PRESENT, &ha->flags)) { + int status = QLA_ERROR; + + if ((qla4010_soft_reset(ha) == QLA_SUCCESS) && + (qla4xxx_topcat_reset(ha) == QLA_SUCCESS) && + (qla4010_soft_reset(ha) == QLA_SUCCESS)) + status = QLA_SUCCESS; + return status; + } else + return qla4010_soft_reset(ha); +} + +/** + * qla4xxx_recover_adapter - recovers adapter after a fatal error + * @ha: Pointer to host adapter structure. + * @renew_ddb_list: Indicates what to do with the adapter's ddb list + * after adapter recovery has completed. + * 0=preserve ddb list, 1=destroy and rebuild ddb list + **/ +static int qla4xxx_recover_adapter(struct scsi_qla_host *ha, + uint8_t renew_ddb_list) +{ + int status; + + /* Stall incoming I/O until we are done */ + clear_bit(AF_ONLINE, &ha->flags); + DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no, + __func__)); + + /* Wait for outstanding commands to complete. + * Stalls the driver for max 30 secs + */ + status = qla4xxx_cmd_wait(ha); + + qla4xxx_disable_intrs(ha); + + /* Flush any pending ddb changed AENs */ + qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); + + /* Reset the firmware. If successful, function + * returns with ISP interrupts enabled. + */ + if (status == QLA_SUCCESS) { + DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n", + ha->host_no, __func__)); + status = qla4xxx_soft_reset(ha); + } + /* FIXMEkaren: Do we want to keep interrupts enabled and process + AENs after soft reset */ + + /* If firmware (SOFT) reset failed, or if all outstanding + * commands have not returned, then do a HARD reset. + */ + if (status == QLA_ERROR) { + DEBUG2(printk("scsi%ld: %s - Performing hard reset..\n", + ha->host_no, __func__)); + status = qla4xxx_hard_reset(ha); + } + + /* Flush any pending ddb changed AENs */ + qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); + + /* Re-initialize firmware. If successful, function returns + * with ISP interrupts enabled */ + if (status == QLA_SUCCESS) { + DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n", + ha->host_no, __func__)); + + /* If successful, AF_ONLINE flag set in + * qla4xxx_initialize_adapter */ + status = qla4xxx_initialize_adapter(ha, renew_ddb_list); + } + + /* Failed adapter initialization? + * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */ + if ((test_bit(AF_ONLINE, &ha->flags) == 0) && + (test_bit(DPC_RESET_HA, &ha->dpc_flags))) { + /* Adapter initialization failed, see if we can retry + * resetting the ha */ + if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) { + ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES; + DEBUG2(printk("scsi%ld: recover adapter - retrying " + "(%d) more times\n", ha->host_no, + ha->retry_reset_ha_cnt)); + set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); + status = QLA_ERROR; + } else { + if (ha->retry_reset_ha_cnt > 0) { + /* Schedule another Reset HA--DPC will retry */ + ha->retry_reset_ha_cnt--; + DEBUG2(printk("scsi%ld: recover adapter - " + "retry remaining %d\n", + ha->host_no, + ha->retry_reset_ha_cnt)); + status = QLA_ERROR; + } + + if (ha->retry_reset_ha_cnt == 0) { + /* Recover adapter retries have been exhausted. + * Adapter DEAD */ + DEBUG2(printk("scsi%ld: recover adapter " + "failed - board disabled\n", + ha->host_no)); + qla4xxx_flush_active_srbs(ha); + clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); + clear_bit(DPC_RESET_HA, &ha->dpc_flags); + clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, + &ha->dpc_flags); + status = QLA_ERROR; + } + } + } else { + clear_bit(DPC_RESET_HA, &ha->dpc_flags); + clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags); + clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); + } + + ha->adapter_error_count++; + + if (status == QLA_SUCCESS) + qla4xxx_enable_intrs(ha); + + DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no)); + return status; +} + +/** + * qla4xxx_do_dpc - dpc routine + * @data: in our case pointer to adapter structure + * + * This routine is a task that is schedule by the interrupt handler + * to perform the background processing for interrupts. We put it + * on a task queue that is consumed whenever the scheduler runs; that's + * so you can do anything (i.e. put the process to sleep etc). In fact, + * the mid-level tries to sleep when it reaches the driver threshold + * "host->can_queue". This can cause a panic if we were in our interrupt code. + **/ +static void qla4xxx_do_dpc(void *data) +{ + struct scsi_qla_host *ha = (struct scsi_qla_host *) data; + struct ddb_entry *ddb_entry, *dtemp; + + DEBUG2(printk("scsi%ld: %s: DPC handler waking up.\n", + ha->host_no, __func__)); + + DEBUG2(printk("scsi%ld: %s: ha->flags = 0x%08lx\n", + ha->host_no, __func__, ha->flags)); + DEBUG2(printk("scsi%ld: %s: ha->dpc_flags = 0x%08lx\n", + ha->host_no, __func__, ha->dpc_flags)); + + /* Initialization not yet finished. Don't do anything yet. */ + if (!test_bit(AF_INIT_DONE, &ha->flags)) + return; + + if (adapter_up(ha) || + test_bit(DPC_RESET_HA, &ha->dpc_flags) || + test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || + test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) { + if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) + /* + * dg 09/23 Never initialize ddb list + * once we up and running + * qla4xxx_recover_adapter(ha, + * REBUILD_DDB_LIST); + */ + qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST); + + if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) + qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST); + + if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { + uint8_t wait_time = RESET_INTR_TOV; + unsigned long flags = 0; + + qla4xxx_flush_active_srbs(ha); + + spin_lock_irqsave(&ha->hardware_lock, flags); + while ((readw(&ha->reg->ctrl_status) & + (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) { + if (--wait_time == 0) + break; + + spin_unlock_irqrestore(&ha->hardware_lock, + flags); + + msleep(1000); + + spin_lock_irqsave(&ha->hardware_lock, flags); + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + if (wait_time == 0) + DEBUG2(printk("scsi%ld: %s: SR|FSR " + "bit not cleared-- resetting\n", + ha->host_no, __func__)); + } + } + + /* ---- process AEN? --- */ + if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) + qla4xxx_process_aen(ha, PROCESS_ALL_AENS); + + /* ---- Get DHCP IP Address? --- */ + if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) + qla4xxx_get_dhcp_ip_address(ha); + + /* ---- relogin device? --- */ + if (adapter_up(ha) && + test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { + list_for_each_entry_safe(ddb_entry, dtemp, + &ha->ddb_list, list) { + if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) && + atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) + qla4xxx_relogin_device(ha, ddb_entry); + + /* + * If mbx cmd times out there is no point + * in continuing further. + * With large no of targets this can hang + * the system. + */ + if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) { + printk(KERN_WARNING "scsi%ld: %s: " + "need to reset hba\n", + ha->host_no, __func__); + break; + } + } + } +} + +/** + * qla4xxx_free_adapter - release the adapter + * @ha: pointer to adapter structure + **/ +static void qla4xxx_free_adapter(struct scsi_qla_host *ha) +{ + + if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) { + /* Turn-off interrupts on the card. */ + qla4xxx_disable_intrs(ha); + } + + /* Kill the kernel thread for this host */ + if (ha->dpc_thread) + destroy_workqueue(ha->dpc_thread); + + /* Issue Soft Reset to put firmware in unknown state */ + qla4xxx_soft_reset(ha); + + /* Remove timer thread, if present */ + if (ha->timer_active) + qla4xxx_stop_timer(ha); + + /* free extra memory */ + qla4xxx_mem_free(ha); + + /* Detach interrupts */ + if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) + free_irq(ha->pdev->irq, ha); + + pci_disable_device(ha->pdev); + +} + +/*** + * qla4xxx_iospace_config - maps registers + * @ha: pointer to adapter structure + * + * This routines maps HBA's registers from the pci address space + * into the kernel virtual address space for memory mapped i/o. + **/ +static int qla4xxx_iospace_config(struct scsi_qla_host *ha) +{ + unsigned long pio, pio_len, pio_flags; + unsigned long mmio, mmio_len, mmio_flags; + + pio = pci_resource_start(ha->pdev, 0); + pio_len = pci_resource_len(ha->pdev, 0); + pio_flags = pci_resource_flags(ha->pdev, 0); + if (pio_flags & IORESOURCE_IO) { + if (pio_len < MIN_IOBASE_LEN) { + dev_warn(&ha->pdev->dev, + "Invalid PCI I/O region size\n"); + pio = 0; + } + } else { + dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n"); + pio = 0; + } + + /* Use MMIO operations for all accesses. */ + mmio = pci_resource_start(ha->pdev, 1); + mmio_len = pci_resource_len(ha->pdev, 1); + mmio_flags = pci_resource_flags(ha->pdev, 1); + + if (!(mmio_flags & IORESOURCE_MEM)) { + dev_err(&ha->pdev->dev, + "region #0 not an MMIO resource, aborting\n"); + + goto iospace_error_exit; + } + if (mmio_len < MIN_IOBASE_LEN) { + dev_err(&ha->pdev->dev, + "Invalid PCI mem region size, aborting\n"); + goto iospace_error_exit; + } + + if (pci_request_regions(ha->pdev, DRIVER_NAME)) { + dev_warn(&ha->pdev->dev, + "Failed to reserve PIO/MMIO regions\n"); + + goto iospace_error_exit; + } + + ha->pio_address = pio; + ha->pio_length = pio_len; + ha->reg = ioremap(mmio, MIN_IOBASE_LEN); + if (!ha->reg) { + dev_err(&ha->pdev->dev, + "cannot remap MMIO, aborting\n"); + + goto iospace_error_exit; + } + + return 0; + +iospace_error_exit: + return -ENOMEM; +} + +/** + * qla4xxx_probe_adapter - callback function to probe HBA + * @pdev: pointer to pci_dev structure + * @pci_device_id: pointer to pci_device entry + * + * This routine will probe for Qlogic 4xxx iSCSI host adapters. + * It returns zero if successful. It also initializes all data necessary for + * the driver. + **/ +static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + int ret = -ENODEV, status; + struct Scsi_Host *host; + struct scsi_qla_host *ha; + struct ddb_entry *ddb_entry, *ddbtemp; + uint8_t init_retry_count = 0; + char buf[34]; + + if (pci_enable_device(pdev)) + return -1; + + host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha)); + if (host == NULL) { + printk(KERN_WARNING + "qla4xxx: Couldn't allocate host from scsi layer!\n"); + goto probe_disable_device; + } + + /* Clear our data area */ + ha = (struct scsi_qla_host *) host->hostdata; + memset(ha, 0, sizeof(*ha)); + + /* Save the information from PCI BIOS. */ + ha->pdev = pdev; + ha->host = host; + ha->host_no = host->host_no; + + /* Configure PCI I/O space. */ + ret = qla4xxx_iospace_config(ha); + if (ret) + goto probe_failed; + + dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n", + pdev->device, pdev->irq, ha->reg); + + qla4xxx_config_dma_addressing(ha); + + /* Initialize lists and spinlocks. */ + INIT_LIST_HEAD(&ha->ddb_list); + INIT_LIST_HEAD(&ha->free_srb_q); + + mutex_init(&ha->mbox_sem); + init_waitqueue_head(&ha->mailbox_wait_queue); + + spin_lock_init(&ha->hardware_lock); + spin_lock_init(&ha->list_lock); + + /* Allocate dma buffers */ + if (qla4xxx_mem_alloc(ha)) { + dev_warn(&ha->pdev->dev, + "[ERROR] Failed to allocate memory for adapter\n"); + + ret = -ENOMEM; + goto probe_failed; + } + + /* + * Initialize the Host adapter request/response queues and + * firmware + * NOTE: interrupts enabled upon successful completion + */ + status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); + while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) { + DEBUG2(printk("scsi: %s: retrying adapter initialization " + "(%d)\n", __func__, init_retry_count)); + qla4xxx_soft_reset(ha); + status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); + } + if (status == QLA_ERROR) { + dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n"); + + ret = -ENODEV; + goto probe_failed; + } + + host->cmd_per_lun = 3; + host->max_channel = 0; + host->max_lun = MAX_LUNS - 1; + host->max_id = MAX_TARGETS; + host->max_cmd_len = IOCB_MAX_CDB_LEN; + host->can_queue = MAX_SRBS ; + host->transportt = qla4xxx_scsi_transport; + + ret = scsi_init_shared_tag_map(host, MAX_SRBS); + if (ret) { + dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed"); + goto probe_failed; + } + + /* Startup the kernel thread for this host adapter. */ + DEBUG2(printk("scsi: %s: Starting kernel thread for " + "qla4xxx_dpc\n", __func__)); + sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no); + ha->dpc_thread = create_singlethread_workqueue(buf); + if (!ha->dpc_thread) { + dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n"); + ret = -ENODEV; + goto probe_failed; + } + INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc, ha); + + ret = request_irq(pdev->irq, qla4xxx_intr_handler, + SA_INTERRUPT|SA_SHIRQ, "qla4xxx", ha); + if (ret) { + dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d" + " already in use.\n", pdev->irq); + goto probe_failed; + } + set_bit(AF_IRQ_ATTACHED, &ha->flags); + host->irq = pdev->irq; + DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq)); + + qla4xxx_enable_intrs(ha); + + /* Start timer thread. */ + qla4xxx_start_timer(ha, qla4xxx_timer, 1); + + set_bit(AF_INIT_DONE, &ha->flags); + + pci_set_drvdata(pdev, ha); + + ret = scsi_add_host(host, &pdev->dev); + if (ret) + goto probe_failed; + + /* Update transport device information for all devices. */ + list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { + if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) + if (qla4xxx_add_sess(ddb_entry)) + goto remove_host; + } + + printk(KERN_INFO + " QLogic iSCSI HBA Driver version: %s\n" + " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n", + qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev), + ha->host_no, ha->firmware_version[0], ha->firmware_version[1], + ha->patch_number, ha->build_number); + + return 0; + +remove_host: + qla4xxx_free_ddb_list(ha); + scsi_remove_host(host); + +probe_failed: + qla4xxx_free_adapter(ha); + scsi_host_put(ha->host); + +probe_disable_device: + pci_disable_device(pdev); + + return ret; +} + +/** + * qla4xxx_remove_adapter - calback function to remove adapter. + * @pci_dev: PCI device pointer + **/ +static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev) +{ + struct scsi_qla_host *ha; + + ha = pci_get_drvdata(pdev); + + /* remove devs from iscsi_sessions to scsi_devices */ + qla4xxx_free_ddb_list(ha); + + scsi_remove_host(ha->host); + + qla4xxx_free_adapter(ha); + + scsi_host_put(ha->host); + + pci_set_drvdata(pdev, NULL); +} + +/** + * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method. + * @ha: HA context + * + * At exit, the @ha's flags.enable_64bit_addressing set to indicated + * supported addressing method. + */ +void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha) +{ + int retval; + + /* Update our PCI device dma_mask for full 64 bit mask */ + if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) { + if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) { + dev_dbg(&ha->pdev->dev, + "Failed to set 64 bit PCI consistent mask; " + "using 32 bit.\n"); + retval = pci_set_consistent_dma_mask(ha->pdev, + DMA_32BIT_MASK); + } + } else + retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK); +} + +static int qla4xxx_slave_alloc(struct scsi_device *sdev) +{ + struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target); + struct ddb_entry *ddb = sess->dd_data; + + sdev->hostdata = ddb; + sdev->tagged_supported = 1; + scsi_activate_tcq(sdev, sdev->host->can_queue); + return 0; +} + +static int qla4xxx_slave_configure(struct scsi_device *sdev) +{ + sdev->tagged_supported = 1; + return 0; +} + +static void qla4xxx_slave_destroy(struct scsi_device *sdev) +{ + scsi_deactivate_tcq(sdev, 1); +} + +/** + * qla4xxx_del_from_active_array - returns an active srb + * @ha: Pointer to host adapter structure. + * @index: index into to the active_array + * + * This routine removes and returns the srb at the specified index + **/ +struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index) +{ + struct srb *srb = NULL; + struct scsi_cmnd *cmd; + + if (!(cmd = scsi_host_find_tag(ha->host, index))) + return srb; + + if (!(srb = (struct srb *)cmd->host_scribble)) + return srb; + + /* update counters */ + if (srb->flags & SRB_DMA_VALID) { + ha->req_q_count += srb->iocb_cnt; + ha->iocb_cnt -= srb->iocb_cnt; + if (srb->cmd) + srb->cmd->host_scribble = NULL; + } + return srb; +} + +/** + * qla4xxx_soft_reset - performs a SOFT RESET of hba. + * @ha: Pointer to host adapter structure. + **/ +int qla4xxx_soft_reset(struct scsi_qla_host *ha) +{ + + DEBUG2(printk(KERN_WARNING "scsi%ld: %s: chip reset!\n", ha->host_no, + __func__)); + if (test_bit(AF_TOPCAT_CHIP_PRESENT, &ha->flags)) { + int status = QLA_ERROR; + + if ((qla4010_soft_reset(ha) == QLA_SUCCESS) && + (qla4xxx_topcat_reset(ha) == QLA_SUCCESS) && + (qla4010_soft_reset(ha) == QLA_SUCCESS) ) + status = QLA_SUCCESS; + return status; + } else + return qla4010_soft_reset(ha); +} + +/** + * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware + * @ha: actual ha whose done queue will contain the comd returned by firmware. + * @cmd: Scsi Command to wait on. + * + * This routine waits for the command to be returned by the Firmware + * for some max time. + **/ +static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha, + struct scsi_cmnd *cmd) +{ + int done = 0; + struct srb *rp; + uint32_t max_wait_time = EH_WAIT_CMD_TOV; + + do { + /* Checking to see if its returned to OS */ + rp = (struct srb *) cmd->SCp.ptr; + if (rp == NULL) { + done++; + break; + } + + msleep(2000); + } while (max_wait_time--); + + return done; +} + +/** + * qla4xxx_wait_for_hba_online - waits for HBA to come online + * @ha: Pointer to host adapter structure + **/ +static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha) +{ + unsigned long wait_online; + + wait_online = jiffies + (30 * HZ); + while (time_before(jiffies, wait_online)) { + + if (adapter_up(ha)) + return QLA_SUCCESS; + else if (ha->retry_reset_ha_cnt == 0) + return QLA_ERROR; + + msleep(2000); + } + + return QLA_ERROR; +} + +/** + * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish. + * @ha: pointer to to HBA + * @t: target id + * @l: lun id + * + * This function waits for all outstanding commands to a lun to complete. It + * returns 0 if all pending commands are returned and 1 otherwise. + **/ +static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha, + int t, int l) +{ + int cnt; + int status = 0; + struct scsi_cmnd *cmd; + + /* + * Waiting for all commands for the designated target in the active + * array + */ + for (cnt = 0; cnt < ha->host->can_queue; cnt++) { + cmd = scsi_host_find_tag(ha->host, cnt); + if (cmd && cmd->device->id == t && cmd->device->lun == l) { + if (!qla4xxx_eh_wait_on_command(ha, cmd)) { + status++; + break; + } + } + } + return status; +} + +/** + * qla4xxx_eh_device_reset - callback for target reset. + * @cmd: Pointer to Linux's SCSI command structure + * + * This routine is called by the Linux OS to reset all luns on the + * specified target. + **/ +static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd) +{ + struct scsi_qla_host *ha = to_qla_host(cmd->device->host); + struct ddb_entry *ddb_entry = cmd->device->hostdata; + struct srb *sp; + int ret = FAILED, stat; + + sp = (struct srb *) cmd->SCp.ptr; + if (!sp || !ddb_entry) + return ret; + + dev_info(&ha->pdev->dev, + "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no, + cmd->device->channel, cmd->device->id, cmd->device->lun); + + DEBUG2(printk(KERN_INFO + "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x," + "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no, + cmd, jiffies, cmd->timeout_per_command / HZ, + ha->dpc_flags, cmd->result, cmd->allowed)); + + /* FIXME: wait for hba to go online */ + stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun); + if (stat != QLA_SUCCESS) { + dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat); + goto eh_dev_reset_done; + } + + /* Send marker. */ + ha->marker_needed = 1; + + /* + * If we are coming down the EH path, wait for all commands to complete + * for the device. + */ + if (cmd->device->host->shost_state == SHOST_RECOVERY) { + if (qla4xxx_eh_wait_for_active_target_commands(ha, + cmd->device->id, + cmd->device->lun)){ + dev_info(&ha->pdev->dev, + "DEVICE RESET FAILED - waiting for " + "commands.\n"); + goto eh_dev_reset_done; + } + } + + dev_info(&ha->pdev->dev, + "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n", + ha->host_no, cmd->device->channel, cmd->device->id, + cmd->device->lun); + + ret = SUCCESS; + +eh_dev_reset_done: + + return ret; +} + +/** + * qla4xxx_eh_host_reset - kernel callback + * @cmd: Pointer to Linux's SCSI command structure + * + * This routine is invoked by the Linux kernel to perform fatal error + * recovery on the specified adapter. + **/ +static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd) +{ + int return_status = FAILED; + struct scsi_qla_host *ha; + + ha = (struct scsi_qla_host *) cmd->device->host->hostdata; + + dev_info(&ha->pdev->dev, + "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, + cmd->device->channel, cmd->device->id, cmd->device->lun); + + if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) { + DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter " + "DEAD.\n", ha->host_no, cmd->device->channel, + __func__)); + + return FAILED; + } + + if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) { + return_status = SUCCESS; + } + + dev_info(&ha->pdev->dev, "HOST RESET %s.\n", + return_status == FAILED ? "FAILED" : "SUCCEDED"); + + return return_status; +} + + +static struct pci_device_id qla4xxx_pci_tbl[] = { + { + .vendor = PCI_VENDOR_ID_QLOGIC, + .device = PCI_DEVICE_ID_QLOGIC_ISP4010, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + }, + { + .vendor = PCI_VENDOR_ID_QLOGIC, + .device = PCI_DEVICE_ID_QLOGIC_ISP4022, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + }, + {0, 0}, +}; +MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl); + +struct pci_driver qla4xxx_pci_driver = { + .name = DRIVER_NAME, + .id_table = qla4xxx_pci_tbl, + .probe = qla4xxx_probe_adapter, + .remove = qla4xxx_remove_adapter, +}; + +static int __init qla4xxx_module_init(void) +{ + int ret; + + /* Allocate cache for SRBs. */ + srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0, + SLAB_HWCACHE_ALIGN, NULL, NULL); + if (srb_cachep == NULL) { + printk(KERN_ERR + "%s: Unable to allocate SRB cache..." + "Failing load!\n", DRIVER_NAME); + ret = -ENOMEM; + goto no_srp_cache; + } + + /* Derive version string. */ + strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION); + if (extended_error_logging) + strcat(qla4xxx_version_str, "-debug"); + + qla4xxx_scsi_transport = + iscsi_register_transport(&qla4xxx_iscsi_transport); + if (!qla4xxx_scsi_transport){ + ret = -ENODEV; + goto release_srb_cache; + } + + printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); + ret = pci_register_driver(&qla4xxx_pci_driver); + if (ret) + goto unregister_transport; + + printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); + return 0; +unregister_transport: + iscsi_unregister_transport(&qla4xxx_iscsi_transport); +release_srb_cache: + kmem_cache_destroy(srb_cachep); +no_srp_cache: + return ret; +} + +static void __exit qla4xxx_module_exit(void) +{ + pci_unregister_driver(&qla4xxx_pci_driver); + iscsi_unregister_transport(&qla4xxx_iscsi_transport); + kmem_cache_destroy(srb_cachep); +} + +module_init(qla4xxx_module_init); +module_exit(qla4xxx_module_exit); + +MODULE_AUTHOR("QLogic Corporation"); +MODULE_DESCRIPTION("QLogic iSCSI HBA Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(QLA4XXX_DRIVER_VERSION); |
