/* * * linux/drivers/s390/scsi/zfcp_fsf.c * * FCP adapter driver for IBM eServer zSeries * * (C) Copyright IBM Corp. 2002, 2004 * * Author(s): Martin Peschke * Raimund Schroeder * Aron Zeh * Wolfgang Taphorn * Stefan Bader * Heiko Carstens * Andreas Herrmann * Volker Sameske * * 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" 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 *, struct timer_list *); 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_adapter *, struct fsf_link_down_info *); static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *); /* association between FSF command and FSF QTCB type */ static u32 fsf_qtcb_type[] = { [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND }; static const char zfcp_act_subtable_type[5][8] = { "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) { size_t size; void *ptr; struct zfcp_fsf_req *fsf_req = NULL; if (req_flags & ZFCP_REQ_NO_QTCB) size = sizeof(struct zfcp_fsf_req); else size = sizeof(struct zfcp_fsf_req_pool_element); if (likely(pool != NULL)) ptr = mempool_alloc(pool, GFP_ATOMIC); else ptr = kmalloc(size, GFP_ATOMIC); if (unlikely(NULL == ptr)) goto out; memset(ptr, 0, size); if (req_flags & ZFCP_REQ_NO_QTCB) { fsf_req = (struct zfcp_fsf_req *) ptr; } else { fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req; fsf_req->qtcb = &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb; } fsf_req->pool = pool; out: return fsf_req; } /* * 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 */ void zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) { if (likely(fsf_req->pool != NULL)) mempool_free(fsf_req, fsf_req->pool); else kfree(fsf_req); } /* * function: * * purpose: * * returns: * * note: qdio queues shall be down (no ongoing inbound processing) */ int zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) { struct zfcp_fsf_req *fsf_req, *tmp; unsigned long flags; LIST_HEAD(remove_queue); spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); list_splice_init(&adapter->fsf_req_list_head, &remove_queue); atomic_set(&adapter->fsf_reqs_active, 0); spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { list_del(&fsf_req->list); zfcp_fsf_req_dismiss(fsf_req); } return 0; } /* * function: * * purpose: * * returns: */ static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req) { fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; zfcp_fsf_req_complete(fsf_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) { 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 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; /* 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); } out: return retval; } /* * 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) { 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; } /* log additional information provided by FSF (if any) */ if (unlikely(qtcb->header.log_length)) { /* do not trust them ;-) */ if (qtcb->header.log_start > sizeof(struct fsf_qtcb)) { ZFCP_LOG_NORMAL ("bug: ULP (FSF logging) log data starts " "beyond end of packet header. Ignored. " "(start=%i, size=%li)\n", qtcb->header.log_start, sizeof(struct fsf_qtcb)); goto forget_log; } if ((size_t) (qtcb->header.log_start + qtcb->header.log_length) > sizeof(struct fsf_qtcb)) { ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends " "beyond end of packet header. Ignored. " "(start=%i, length=%i, size=%li)\n", qtcb->header.log_start, qtcb->header.log_length, sizeof(struct fsf_qtcb)); goto forget_log; } ZFCP_LOG_TRACE("ULP log data: \n"); ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) qtcb + qtcb->header.log_start, qtcb->header.log_length); } forget_log: /* evaluate FSF Protocol Status */ switch (qtcb->prefix.prot_status) { case FSF_PROT_GOOD: case FSF_PROT_FSF_STATUS_PRESENTED: break; 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 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)); 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_PROT_LINK_DOWN: zfcp_fsf_link_down_info_eval(adapter, &prot_status_qual->link_down_info); zfcp_erp_adapter_reopen(adapter, 0); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 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, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | ZFCP_STATUS_COMMON_ERP_FAILED); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; } 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; } /* * 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) { int retval = 0; if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { goto skip_fsfstatus; } /* 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); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_FCP_RSP_AVAILABLE: ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " "SCSI stack.\n"); break; case FSF_ADAPTER_STATUS_AVAILABLE: zfcp_fsf_fsfstatus_qual_eval(fsf_req); 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); return retval; } /* * 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) { int retval = 0; switch (fsf_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); 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 */ 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; break; } return retval; } /** * zfcp_fsf_link_down_info_eval - evaluate link down information block */ static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter, struct fsf_link_down_info *link_down) { if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status)) 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)); 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)); 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)); 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)); 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)); 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)); 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)); break; case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n", zfcp_get_busid_by_adapter(adapter)); 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)); 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); } /* * function: zfcp_fsf_req_dispatch * * purpose: calls the appropriate command specific handler * * returns: */ static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) { struct zfcp_erp_action *erp_action = fsf_req->erp_action; struct zfcp_adapter *adapter = fsf_req->adapter; int retval = 0; switch (fsf_req->fsf_command) { case FSF_QTCB_FCP_CMND: zfcp_fsf_send_fcp_command_handler(fsf_req); break; case FSF_QTCB_ABORT_FCP_CMND: zfcp_fsf_abort_fcp_command_handler(fsf_req); break; case FSF_QTCB_SEND_GENERIC: zfcp_fsf_send_ct_handler(fsf_req); break; case FSF_QTCB_OPEN_PORT_WITH_DID: zfcp_fsf_open_port_handler(fsf_req); break; case FSF_QTCB_OPEN_LUN: zfcp_fsf_open_unit_handler(fsf_req); break; case FSF_QTCB_CLOSE_LUN: zfcp_fsf_close_unit_handler(fsf_req); break; case FSF_QTCB_CLOSE_PORT: zfcp_fsf_close_port_handler(fsf_req); break; case FSF_QTCB_CLOSE_PHYSICAL_PORT: zfcp_fsf_close_physical_port_handler(fsf_req); break; case FSF_QTCB_EXCHANGE_CONFIG_DATA: zfcp_fsf_exchange_config_data_handler(fsf_req); break; case FSF_QTCB_EXCHANGE_PORT_DATA: zfcp_fsf_exchange_port_data_handler(fsf_req); break; case FSF_QTCB_SEND_ELS: zfcp_fsf_send_els_handler(fsf_req); break; case FSF_QTCB_DOWNLOAD_CONTROL_FILE: zfcp_fsf_control_file_handler(fsf_req); break; case FSF_QTCB_UPLOAD_CONTROL_FILE: zfcp_fsf_control_file_handler(fsf_req); 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); } if (!erp_action) return retval; zfcp_erp_async_handler(erp_action, 0); return retval; } /* * 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) { 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; 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; /* 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); /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(fsf_req, NULL); if (retval) { ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " "environment.\n"); goto failed_req_send; } ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", zfcp_get_busid_by_adapter(adapter)); goto out; failed_req_send: mempool_free(status_buffer, adapter->pool.data_status_read); 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_status_read_port_closed(struct zfcp_fsf_req *fsf_req) { struct fsf_status_read_buffer *status_buffer; struct zfcp_adapter *adapter; struct zfcp_port *port; unsigned long flags; status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; adapter = fsf_req->adapter; 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); 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%08x on " "adapter %s. Ignored.\n", status_buffer->d_id & ZFCP_DID_MASK, zfcp_get_busid_by_adapter(adapter)); goto out; } switch (status_buffer->status_subtype) { case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:"); zfcp_erp_port_reopen(port, 0); break; case FSF_STATUS_READ_SUB_ERROR_PORT: debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:"); zfcp_erp_port_shutdown(port, 0); break; default: debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:"); debug_exception(adapter->erp_dbf, 0, &status_buffer->status_subtype, sizeof (u32)); ZFCP_LOG_NORMAL("bug: Undefined status subtype received " "for a reopen indication on port with " "d_id 0x%08x 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; } /* * 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) { 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; 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; } zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); switch (status_buffer->status_type) { case FSF_STATUS_READ_PORT_CLOSED: zfcp_fsf_status_read_port_closed(fsf_req); break; case FSF_STATUS_READ_INCOMING_ELS: zfcp_fsf_incoming_els(fsf_req); break; case FSF_STATUS_READ_SENSE_DATA_AVAIL: ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", zfcp_get_busid_by_adapter(adapter)); break; case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: ZFCP_LOG_NORMAL("Bit error threshold data received:\n"); ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer, sizeof (struct fsf_status_read_buffer)); break; 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(adapter, (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(adapter, (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(adapter, 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(adapter, NULL); }; break; 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, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | ZFCP_STATUS_COMMON_ERP_FAILED); break; 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); break; 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); break; 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; case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: debug_text_event(adapter->erp_dbf, 2, "unsol_features:"); 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; 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); } } out: return retval; } /* * 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 */ 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; unsigned long lock_flags; struct zfcp_fsf_req *fsf_req = NULL; 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; } 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->data = (unsigned long) unit; /* 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; /* set handle of request which should be aborted */ fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; /* start QDIO request for this FSF request */ zfcp_fsf_start_scsi_er_timer(adapter); retval = zfcp_fsf_req_send(fsf_req, NULL); if (retval) { del_timer(&adapter->scsi_er_timer); ZFCP_LOG_INFO("error: Failed to send abort command request " "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", zfcp_get_busid_by_adapter(adapter), unit->port->wwpn, unit->fcp_lun); zfcp_fsf_req_free(fsf_req); fsf_req = NULL; goto out; } ZFCP_LOG_DEBUG("Abort FCP Command request initiated " "(adapter%s, port d_id=0x%08x, " "unit x%016Lx, old_req_id=0x%lx)\n", zfcp_get_busid_by_adapter(adapter), unit->port->d_id, unit->fcp_lun, old_req_id); out: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); return fsf_req; } /* * 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) { int retval = -EINVAL; struct zfcp_unit *unit; unsigned char status_qual = new_fsf_req->qtcb->header.fsf_status_qual.word[0]; del_timer(&new_fsf_req->adapter->scsi_er_timer); 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; /* evaluate FSF status in QTCB */ switch (new_fsf_req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: if (status_qual >> 4 != status_qual % 0xf) { debug_text_event(new_fsf_req->adapter->erp_dbf, 3, "fsf_s_phand_nv0"); /* * 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 */ debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_phand_nv1"); zfcp_erp_adapter_reopen(unit->port->adapter, 0); new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; } break; case FSF_LUN_HANDLE_NOT_VALID: if (status_qual >> 4 != status_qual % 0xf) { /* 2 */ debug_text_event(new_fsf_req->adapter->erp_dbf, 3, "fsf_s_lhand_nv0"); /* * 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 */ debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lhand_nv1"); zfcp_erp_port_reopen(unit->port, 0); new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; } break; case FSF_FCP_COMMAND_DOES_NOT_EXIST: retval = 0; debug_text_event(new_fsf_req->adapter->erp_dbf, 3, "fsf_s_no_exist"); new_fsf_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)); debug_text_event(new_fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); zfcp_erp_port_boxed(unit->port); new_fsf_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)); debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); zfcp_erp_unit_boxed(unit); new_fsf_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]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_sq_ltest"); 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 */ debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_sq_ulp"); 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]); debug_text_event(new_fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception(new_fsf_req->adapter->erp_dbf, 0, &new_fsf_req->qtcb->header. fsf_status_qual.word[0], sizeof (u32)); 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); debug_text_event(new_fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(new_fsf_req->adapter->erp_dbf, 0, &new_fsf_req->qtcb->header.fsf_status, sizeof (u32)); 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. */ 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) { 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; } if (erp_action != NULL) { erp_action->fsf_req = fsf_req; fsf_req->erp_action = erp_action; } 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 = adapter->fc_service_class; fsf_req->qtcb->bottom.support.timeout = ct->timeout; fsf_req->data = (unsigned long) ct; zfcp_san_dbf_event_ct_request(fsf_req); /* start QDIO request for this FSF request */ ret = zfcp_fsf_req_send(fsf_req, ct->timer); 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; } ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", zfcp_get_busid_by_adapter(adapter), port->wwpn); goto out; 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_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) { 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; 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; if (fsf_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; break; case FSF_SERVICE_CLASS_NOT_SUPPORTED: if (adapter->fc_service_class <= 3) { ZFCP_LOG_INFO("error: adapter %s does not support fc " "class %d.\n", zfcp_get_busid_by_port(port), adapter->fc_service_class); } else { ZFCP_LOG_INFO("bug: The fibre channel class at the " "adapter %s is invalid. " "(debug info %d)\n", zfcp_get_busid_by_port(port), adapter->fc_service_class); } /* stop operation for this adapter */ debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); zfcp_erp_adapter_shutdown(adapter, 0); fsf_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: /* reopening link to port */ debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); zfcp_test_link(port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: /* ERP strategy will escalate */ debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 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]); break; } break; case FSF_ACCESS_DENIED: ZFCP_LOG_NORMAL("access denied, cannot send generic service " "command (adapter %s, port d_id=0x%08x)\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; } } debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); zfcp_erp_port_access_denied(port); 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%08x)\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)); debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej"); 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)); debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv"); zfcp_erp_adapter_reopen(adapter, 0); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_PORT_BOXED: ZFCP_LOG_INFO("port needs to be reopened " "(adapter %s, port d_id=0x%08x)\n", zfcp_get_busid_by_port(port), port->d_id); debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); zfcp_erp_port_boxed(port); fsf_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_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); debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception(adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof (u32)); break; } skip_fsfstatus: send_ct->status = retval; if (send_ct->handler != NULL) send_ct->handler(send_ct->handler_data); return retval; } /** * 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. */ int zfcp_fsf_send_els(struct zfcp_send_els *els) { 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; 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%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); goto failed_req; } 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%08x)\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%08x)\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%08x)\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 = adapter->fc_service_class; 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); /* start QDIO request for this FSF request */ ret = zfcp_fsf_req_send(fsf_req, els->timer); if (ret) { ZFCP_LOG_DEBUG("error: initiation of ELS request failed " "(adapter %s, port d_id: 0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); goto failed_send; } ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); goto out; failed_send: zfcp_fsf_req_free(fsf_req); failed_req: out: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 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) { 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) goto skip_fsfstatus; switch (header->fsf_status) { case FSF_GOOD: zfcp_san_dbf_event_els_response(fsf_req); retval = 0; break; case FSF_SERVICE_CLASS_NOT_SUPPORTED: if (adapter->fc_service_class <= 3) { ZFCP_LOG_INFO("error: adapter %s does " "not support fibrechannel class %d.\n", zfcp_get_busid_by_adapter(adapter), adapter->fc_service_class); } else { ZFCP_LOG_INFO("bug: The fibrechannel class at " "adapter %s is invalid. " "(debug info %d)\n", zfcp_get_busid_by_adapter(adapter), adapter->fc_service_class); } /* stop operation for this adapter */ debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); zfcp_erp_adapter_shutdown(adapter, 0); fsf_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: debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); if (port && (send_els->ls_code != ZFCP_LS_ADISC)) zfcp_test_link(port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 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: debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry"); fsf_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%08x)\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%08x)\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; } } debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); if (port != NULL) zfcp_erp_port_access_denied(port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; 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); debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval"); debug_exception(adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof(u32)); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } skip_fsfstatus: send_els->status = retval; if (send_els->handler != 0) send_els->handler(send_els->handler_data); return retval; } /* * function: * * purpose: * * returns: address of initiated FSF request * NULL - request could not be initiated */ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; unsigned long lock_flags; int retval = 0; /* setup new FSF request */ retval = zfcp_fsf_req_create(erp_action->adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, ZFCP_REQ_AUTO_CLEANUP, erp_action->adapter->pool.fsf_req_erp, &lock_flags, &(erp_action->fsf_req)); if (retval < 0) { ZFCP_LOG_INFO("error: Could not create exchange configuration " "data request for adapter %s.\n", zfcp_get_busid_by_adapter(erp_action->adapter)); goto out; } sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, erp_action->fsf_req->sbal_curr, 0); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; erp_action->fsf_req->erp_action = erp_action; erp_action->fsf_req->qtcb->bottom.config.feature_selection = FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING | FSF_FEATURE_NOTIFICATION_LOST | FSF_FEATURE_UPDATE_ALERT; /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); if (retval) { ZFCP_LOG_INFO ("error: Could not send exchange configuration data " "command on the adapter %s\n", zfcp_get_busid_by_adapter(erp_action->adapter)); zfcp_fsf_req_free(erp_action->fsf_req); erp_action->fsf_req = NULL; goto out; } ZFCP_LOG_DEBUG("exchange configuration data request initiated " "(adapter %s)\n", zfcp_get_busid_by_adapter(erp_action->adapter)); out: write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, lock_flags); 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) { 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)); } ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n" "WWNN 0x%016Lx, " "WWPN 0x%016Lx, " "S_ID 0x%08x,\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)); debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); zfcp_erp_adapter_shutdown(adapter, 0); 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)); debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); zfcp_erp_adapter_shutdown(adapter, 0); 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); debug_text_event(fsf_req->adapter->erp_dbf, 0, "top-p-to-p"); 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)); debug_text_event(fsf_req->adapter->erp_dbf, 0, "top-al"); zfcp_erp_adapter_shutdown(adapter, 0); return -EIO; case FC_PORTTYPE_NPORT: 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)); debug_text_exception(fsf_req->adapter->erp_dbf, 0, "unknown-topo"); zfcp_erp_adapter_shutdown(adapter, 0); 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)); debug_text_event(fsf_req->adapter->erp_dbf, 0, "qtcb-size"); debug_event(fsf_req->adapter->erp_dbf, 0, &bottom->max_qtcb_size, sizeof (u32)); zfcp_erp_adapter_shutdown(adapter, 0); return -EIO; } atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); break; case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); 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(adapter, &qtcb->header.fsf_status_qual.link_down_info); break; default: debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); debug_event(fsf_req->adapter->erp_dbf, 0, &fsf_req->qtcb->header.fsf_status, sizeof (u32)); zfcp_erp_adapter_shutdown(adapter, 0); 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 * @adapter: for which port data is requested * @data: response to exchange port data request */ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action, struct zfcp_adapter *adapter, struct fsf_qtcb_bottom_port *data) { volatile struct qdio_buffer_element *sbale; int retval = 0; unsigned long lock_flags; struct zfcp_fsf_req *fsf_req; struct timer_list *timer; 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)); return -EOPNOTSUPP; } /* setup new FSF request */ retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0, 0, &lock_flags, &fsf_req); if (retval < 0) { 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; } if (data) fsf_req->data = (unsigned long) data; 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; if (erp_action) { erp_action->fsf_req = fsf_req; fsf_req->erp_action = erp_action; timer = &erp_action->timer; } else { timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC); if (!timer) { write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); zfcp_fsf_req_free(fsf_req); return -ENOMEM; } init_timer(timer); timer->function = zfcp_fsf_request_timeout_handler; timer->data = (unsigned long) adapter; timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; } retval = zfcp_fsf_req_send(fsf_req, timer); 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); if (erp_action) erp_action->fsf_req = NULL; else kfree(timer); write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); return retval; } write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); if (!erp_action) { wait_event(fsf_req->completion_wq, fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); del_timer_sync(timer); zfcp_fsf_req_free(fsf_req); kfree(timer); } 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 *qtcb; struct fsf_qtcb_bottom_port *bottom, *data; struct Scsi_Host *shost; adapter = fsf_req->adapter; qtcb = fsf_req->qtcb; bottom = &qtcb->bottom.port; shost = adapter->scsi_host; data = (struct fsf_qtcb_bottom_port*) fsf_req->data; if (data) memcpy(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(adapter, &qtcb->header.fsf_status_qual.link_down_info); break; default: debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng"); debug_event(adapter->erp_dbf, 0, &fsf_req->qtcb->header.fsf_status, sizeof(u32)); } } /* * 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; 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, &(erp_action->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(erp_action->fsf_req, erp_action->fsf_req->sbal_curr, 0); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); erp_action->fsf_req->data = (unsigned long) erp_action->port; erp_action->fsf_req->erp_action = erp_action; /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 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(erp_action->fsf_req); erp_action->fsf_req = NULL; goto out; } 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) { int retval = -EINVAL; struct zfcp_port *port; 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 */ 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)); debug_text_exception(fsf_req->adapter->erp_dbf, 0, "fsf_s_popen"); /* * 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; } } debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); zfcp_erp_port_access_denied(port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_max_ports"); zfcp_erp_port_failed(port); fsf_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: debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ltest"); /* ERP strategy will escalate */ fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: /* ERP strategy will escalate */ debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ulp"); fsf_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)); debug_text_exception(fsf_req->adapter->erp_dbf, 0, "fsf_sq_no_retry"); zfcp_erp_port_failed(port); 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]); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception( fsf_req->adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof (u32)); 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 * not monitor closures of target port connections caused on * the remote side. Thus, they might miss out on invalidating * locally cached WWPNs (and other N_Port parameters) of gone * target ports. So, our heroic attempt to make things safe * could be undermined by 'open port' response data tagged with * obsolete WWPNs. Another reason to monitor potential * connection closures ourself at least (by interpreting * incoming ELS' and unsolicited status). It just crosses my * mind that one should be able to cross-check by means of * 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 < ((((unsigned long) &plogi->serv_param.wwpn) - ((unsigned long) plogi)) + sizeof (u64))) { ZFCP_LOG_INFO( "warning: insufficient length of " "PLOGI payload (%i)\n", fsf_req->qtcb->bottom.support.els1_length); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_short_plogi:"); /* 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); debug_text_event( fsf_req->adapter->erp_dbf, 0, "fsf_s_did_change:"); atomic_clear_mask( ZFCP_STATUS_PORT_DID_DID, &port->status); } else port->wwnn = plogi->serv_param.wwnn; } } 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); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(fsf_req->adapter->erp_dbf, 0, &header->fsf_status, sizeof (u32)); break; } 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 */ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; 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, &(erp_action->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)); goto out; } sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, erp_action->fsf_req->sbal_curr, 0); 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); erp_action->fsf_req->data = (unsigned long) erp_action->port; erp_action->fsf_req->erp_action = erp_action; erp_action->fsf_req->qtcb->header.port_handle = erp_action->port->handle; /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 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(erp_action->fsf_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); 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) { int retval = -EINVAL; struct zfcp_port *port; port = (struct zfcp_port *) fsf_req->data; if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { /* don't change port status in our bookkeeping */ goto skip_fsfstatus; } /* evaluate FSF status in QTCB */ switch (fsf_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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_phand_nv"); zfcp_erp_adapter_reopen(port->adapter, 0); fsf_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, 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); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(fsf_req->adapter->erp_dbf, 0, &fsf_req->qtcb->header.fsf_status, sizeof (u32)); break; } 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 */ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) { int retval = 0; unsigned long lock_flags; volatile struct qdio_buffer_element *sbale; /* 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, &erp_action->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); goto out; } sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, erp_action->fsf_req->sbal_curr, 0); 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 */ erp_action->fsf_req->data = (unsigned long) erp_action->port; /* port to be closed */ erp_action->fsf_req->qtcb->header.port_handle = erp_action->port->handle; erp_action->fsf_req->erp_action = erp_action; /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 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(erp_action->fsf_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); 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) { int retval = -EINVAL; struct zfcp_port *port; 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 */ 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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_phand_nv"); zfcp_erp_adapter_reopen(port->adapter, 0); fsf_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; } } debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); zfcp_erp_port_access_denied(port); fsf_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 but it was attempted " "to close it physically.\n", port->wwpn, zfcp_get_busid_by_port(port)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); zfcp_erp_port_boxed(port); 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: debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ltest"); /* This will now be escalated by ERP */ fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: /* ERP strategy will escalate */ debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ulp"); 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]); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception( fsf_req->adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof (u32)); 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); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(fsf_req->adapter->erp_dbf, 0, &header->fsf_status, sizeof (u32)); break; } 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 */ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; 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, &(erp_action->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)); goto out; } sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, erp_action->fsf_req->sbal_curr, 0); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; erp_action->fsf_req->qtcb->header.port_handle = erp_action->port->handle; erp_action->fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) erp_action->fsf_req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); erp_action->fsf_req->data = (unsigned long) erp_action->unit; erp_action->fsf_req->erp_action = erp_action; /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 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(erp_action->fsf_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); 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) { 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; 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 */ 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_UNIT_SHARED | 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)); debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); zfcp_erp_adapter_reopen(unit->port->adapter, 0); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; 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)); debug_text_exception(adapter->erp_dbf, 0, "fsf_s_uopen"); 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; } } debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); zfcp_erp_unit_access_denied(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; 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)); debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); zfcp_erp_port_boxed(unit->port); fsf_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)); debug_text_event(adapter->erp_dbf, 2, "fsf_s_l_sh_vio"); zfcp_erp_unit_access_denied(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; 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)); debug_text_event(adapter->erp_dbf, 1, "fsf_s_max_units"); zfcp_erp_unit_failed(unit); fsf_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 */ debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); zfcp_test_link(unit->port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: /* ERP strategy will escalate */ debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 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]); debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception(adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof (u32)); } 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) && (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) { exclusive = (bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE); readwrite = (bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER); if (!exclusive) atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 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); } if (exclusive && !readwrite) { ZFCP_LOG_NORMAL("exclusive access of read-only " "unit not supported\n"); zfcp_erp_unit_failed(unit); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; zfcp_erp_unit_shutdown(unit, 0); } else if (!exclusive && readwrite) { ZFCP_LOG_NORMAL("shared access of read-write " "unit not supported\n"); zfcp_erp_unit_failed(unit); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; zfcp_erp_unit_shutdown(unit, 0); } } retval = 0; break; default: ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " "(debug info 0x%x)\n", header->fsf_status); debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(adapter->erp_dbf, 0, &header->fsf_status, sizeof (u32)); break; } 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 */ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) { volatile struct qdio_buffer_element *sbale; 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, &(erp_action->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)); goto out; } sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, erp_action->fsf_req->sbal_curr, 0); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; erp_action->fsf_req->qtcb->header.port_handle = erp_action->port->handle; erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); erp_action->fsf_req->data = (unsigned long) erp_action->unit; erp_action->fsf_req->erp_action = erp_action; /* start QDIO request for this FSF request */ retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 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(erp_action->fsf_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); 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) { int retval = -EINVAL; struct zfcp_unit *unit; unit = (struct zfcp_unit *) fsf_req->data; if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { /* don't change unit status in our bookkeeping */ goto skip_fsfstatus; } /* evaluate FSF status in QTCB */ switch (fsf_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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_phand_nv"); zfcp_erp_adapter_reopen(unit->port->adapter, 0); fsf_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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lhand_nv"); zfcp_erp_port_reopen(unit->port, 0); fsf_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)); debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); zfcp_erp_port_boxed(unit->port); fsf_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]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: /* re-establish link to port */ debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ltest"); zfcp_test_link(unit->port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: /* ERP strategy will escalate */ debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ulp"); 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]); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception( fsf_req->adapter->erp_dbf, 0, &fsf_req->qtcb->header.fsf_status_qual.word[0], sizeof (u32)); 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); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(fsf_req->adapter->erp_dbf, 0, &fsf_req->qtcb->header.fsf_status, sizeof (u32)); break; } 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 */ int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, struct zfcp_unit *unit, struct scsi_cmnd * scsi_cmnd, struct timer_list *timer, int req_flags) { 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; } zfcp_unit_get(unit); fsf_req->unit = unit; /* associate FSF request with SCSI request (for look up on abort) */ scsi_cmnd->host_scribble = (char *) fsf_req; /* 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 = adapter->fc_service_class; /* 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); /* 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); retval = -EINVAL; } goto no_fit; } /* set length of FCP data length in FCP_CMND IU in QTCB */ zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); ZFCP_LOG_DEBUG("Sending SCSI command:\n"); ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); /* * start QDIO request for this FSF request * covered by an SBALE) */ retval = zfcp_fsf_req_send(fsf_req, timer); 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_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); 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); return retval; } /* * function: zfcp_fsf_send_fcp_command_task_management * * purpose: * * returns: * * 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 * */ 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) { 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; } /* * 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 = adapter->fc_service_class; 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; /* start QDIO request for this FSF request */ zfcp_fsf_start_scsi_er_timer(adapter); retval = zfcp_fsf_req_send(fsf_req, NULL); if (retval) { del_timer(&adapter->scsi_er_timer); ZFCP_LOG_INFO("error: Could not send an FCP-command (task " "management) on adapter %s, port 0x%016Lx for " "unit LUN 0x%016Lx\n", zfcp_get_busid_by_adapter(adapter), unit->port->wwpn, unit->fcp_lun); zfcp_fsf_req_free(fsf_req); fsf_req = NULL; goto out; } ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " "tm_flags=0x%x)\n", zfcp_get_busid_by_adapter(adapter), unit->port->wwpn, unit->fcp_lun, tm_flags); out: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); return fsf_req; } /* * 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) { 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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_phand_nv"); zfcp_erp_adapter_reopen(unit->port->adapter, 0); 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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_uhand_nv"); zfcp_erp_port_reopen(unit->port, 0); 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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_hand_mis"); zfcp_erp_adapter_reopen(unit->port->adapter, 0); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SERVICE_CLASS_NOT_SUPPORTED: if (fsf_req->adapter->fc_service_class <= 3) { ZFCP_LOG_NORMAL("error: The adapter %s does " "not support fibrechannel class %d.\n", zfcp_get_busid_by_unit(unit), fsf_req->adapter->fc_service_class); } else { ZFCP_LOG_NORMAL("bug: The fibrechannel class at " "adapter %s is invalid. " "(debug info %d)\n", zfcp_get_busid_by_unit(unit), fsf_req->adapter->fc_service_class); } /* stop operation for this adapter */ debug_text_exception(fsf_req->adapter->erp_dbf, 0, "fsf_s_class_nsup"); zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 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)); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_fcp_lun_nv"); zfcp_erp_port_reopen(unit->port, 0); 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; } } debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); zfcp_erp_unit_access_denied(unit); 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 */ debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_dir_ind_nv"); zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 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 */ debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_cmd_len_nv"); zfcp_erp_adapter_shutdown(unit->port->adapter, 0); fsf_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)); debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); zfcp_erp_port_boxed(unit->port); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_RETRY; break; 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); debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); zfcp_erp_unit_boxed(unit); 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 */ debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ltest"); 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 */ debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_sq_ulp"); break; default: ZFCP_LOG_NORMAL ("Unknown status qualifier 0x%x arrived.\n", header->fsf_status_qual.word[0]); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); debug_exception(fsf_req->adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof(u32)); break; } fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_GOOD: break; case FSF_FCP_RSP_AVAILABLE: break; default: debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); debug_exception(fsf_req->adapter->erp_dbf, 0, &header->fsf_status, sizeof(u32)); break; } 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; } /* * 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) { int retval = 0; struct scsi_cmnd *scpnt; 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); u32 sns_len; char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 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); 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); goto skip_fsfstatus; } /* set message byte of result in SCSI command */ scpnt->result |= COMMAND_COMPLETE << 8; /* * 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 (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); 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 = 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, (void *) &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)); scpnt->resid = fcp_rsp_iu->fcp_resid; if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) set_host_byte(&scpnt->result, DID_ERROR); } skip_fsfstatus: ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); if (scpnt->result != 0) zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); else if (scpnt->retries > 0) zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); else zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_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; } /* * 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) { 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; del_timer(&fsf_req->adapter->scsi_er_timer); if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; goto skip_fsfstatus; } /* 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; } /* * 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) { struct zfcp_fsf_req *fsf_req; struct fsf_qtcb_bottom_support *bottom; volatile struct qdio_buffer_element *sbale; struct timer_list *timer; 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; } timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); if (!timer) { retval = -ENOMEM; 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; init_timer(timer); timer->function = zfcp_fsf_request_timeout_handler; timer->data = (unsigned long) adapter; timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; retval = zfcp_fsf_req_send(fsf_req, timer); 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; del_timer_sync(timer); goto free_timer; free_fsf_req: zfcp_fsf_req_free(fsf_req); unlock_queue_lock: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); free_timer: kfree(timer); out: return retval; } /* * 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 (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { retval = -EINVAL; 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; 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; 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; 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; 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; 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; 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; 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; 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)); debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); debug_exception(fsf_req->adapter->erp_dbf, 0, &header->fsf_status_qual.word[0], sizeof(u32)); fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; retval = -EINVAL; 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 inline 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 = (unsigned long)fsf_req; 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 = (unsigned long)fsf_req; fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; } } /** * 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) */ 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) { 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; zfcp_fsf_req_qtcb_init(fsf_req); /* initialize waitqueue which may be used to wait on this request completion */ init_waitqueue_head(&fsf_req->completion_wq); ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); if(ret < 0) { goto failed_sbals; } /* * 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). */ if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); ret = -EIO; goto failed_sbals; } 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(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; } sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); /* setup common SBALE fields */ sbale[0].addr = fsf_req; 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); } ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", fsf_req->sbal_number, fsf_req->sbal_first); goto success; failed_sbals: /* dequeue new FSF request previously enqueued */ zfcp_fsf_req_free(fsf_req); fsf_req = NULL; failed_fsf_req: write_lock_irqsave(&req_queue->queue_lock, *lock_flags); success: *fsf_req_p = fsf_req; return ret; } /* * 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 */ static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) { 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; unsigned long flags; int retval = 0; adapter = fsf_req->adapter; req_queue = &adapter->request_queue, /* 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); /* put allocated FSF request at list tail */ spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head); spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); inc_seq_no = (fsf_req->qtcb != NULL); /* figure out expiration time of timeout and start timeout */ if (unlikely(timer)) { timer->expires += jiffies; add_timer(timer); } 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_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]); /* * 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); fsf_req->issued = get_clock(); retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); if (unlikely(retval)) { /* Queues are down..... */ retval = -EIO; /* * FIXME(potential race): * timer might be expired (absolutely unlikely) */ if (timer) del_timer(timer); spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); list_del(&fsf_req->list); spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); /* * adjust the number of free SBALs in request queue as well as * position of first one */ 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; /* increase */ req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ ZFCP_LOG_DEBUG ("error: do_QDIO failed. Buffers could not be enqueued " "to request queue.\n"); } 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, */ /* Don't increase for unsolicited status */ if (inc_seq_no) adapter->fsf_req_seq_no++; /* count FSF requests pending */ atomic_inc(&adapter->fsf_reqs_active); } return retval; } #undef ZFCP_LOG_AREA