| /* |
| * This file is part of the zfcp device driver for |
| * FCP adapters for IBM System z9 and zSeries. |
| * |
| * (C) Copyright IBM Corp. 2002, 2006 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include "zfcp_ext.h" |
| |
| static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); |
| static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_send_fcp_command_task_management_handler( |
| struct zfcp_fsf_req *); |
| static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); |
| static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); |
| static inline int zfcp_fsf_req_sbal_check( |
| unsigned long *, struct zfcp_qdio_queue *, int); |
| static inline int zfcp_use_one_sbal( |
| struct scatterlist *, int, struct scatterlist *, int); |
| static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); |
| static int zfcp_fsf_req_send(struct zfcp_fsf_req *); |
| static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); |
| static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); |
| static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); |
| static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8, |
| struct fsf_link_down_info *); |
| static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); |
| |
| /* 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_qtcb); |
| |
| if (likely(pool)) |
| ptr = mempool_alloc(pool, GFP_ATOMIC); |
| else { |
| if (req_flags & ZFCP_REQ_NO_QTCB) |
| ptr = kmalloc(size, GFP_ATOMIC); |
| else |
| ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, |
| GFP_ATOMIC); |
| } |
| |
| if (unlikely(!ptr)) |
| goto out; |
| |
| memset(ptr, 0, size); |
| |
| if (req_flags & ZFCP_REQ_NO_QTCB) { |
| fsf_req = (struct zfcp_fsf_req *) ptr; |
| } else { |
| fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req; |
| fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb; |
| } |
| |
| 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)) { |
| mempool_free(fsf_req, fsf_req->pool); |
| return; |
| } |
| |
| if (fsf_req->qtcb) { |
| kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req); |
| return; |
| } |
| |
| kfree(fsf_req); |
| } |
| |
| /* |
| * Never ever call this without shutting down the adapter first. |
| * Otherwise the adapter would continue using and corrupting s390 storage. |
| * Included BUG_ON() call to ensure this is done. |
| * ERP is supposed to be the only user of this function. |
| */ |
| void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) |
| { |
| struct zfcp_fsf_req *fsf_req, *tmp; |
| unsigned long flags; |
| LIST_HEAD(remove_queue); |
| unsigned int i; |
| |
| BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)); |
| spin_lock_irqsave(&adapter->req_list_lock, flags); |
| atomic_set(&adapter->reqs_active, 0); |
| for (i = 0; i < REQUEST_LIST_SIZE; i++) |
| list_splice_init(&adapter->req_list[i], &remove_queue); |
| spin_unlock_irqrestore(&adapter->req_list_lock, flags); |
| |
| list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { |
| list_del(&fsf_req->list); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
| zfcp_fsf_req_complete(fsf_req); |
| } |
| } |
| |
| /* |
| * 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 { |
| del_timer(&fsf_req->timer); |
| zfcp_fsf_protstatus_eval(fsf_req); |
| } |
| |
| /* |
| * fsf_req may be deleted due to waking up functions, so |
| * cleanup is saved here and used later |
| */ |
| if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) |
| cleanup = 1; |
| else |
| cleanup = 0; |
| |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; |
| |
| /* 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; |
| } |
| |
| /* 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, 117, fsf_req); |
| 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, 98, fsf_req); |
| 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, 118, fsf_req); |
| 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, 78, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_PROT_LINK_DOWN: |
| zfcp_fsf_link_down_info_eval(fsf_req, 37, |
| &prot_status_qual->link_down_info); |
| /* FIXME: reopening adapter now? better wait for link up */ |
| zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_PROT_REEST_QUEUE: |
| ZFCP_LOG_NORMAL("The local link to adapter with " |
| "%s was re-plugged. " |
| "Re-starting operations on this adapter.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| /* All ports should be marked as ready to run again */ |
| zfcp_erp_modify_adapter_status(adapter, 28, NULL, |
| ZFCP_STATUS_COMMON_RUNNING, |
| ZFCP_SET); |
| zfcp_erp_adapter_reopen(adapter, |
| ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
| | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 99, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_PROT_ERROR_STATE: |
| ZFCP_LOG_NORMAL("error: The adapter %s " |
| "has entered the error state. " |
| "Restarting all operations on this " |
| "adapter.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| default: |
| ZFCP_LOG_NORMAL("bug: Transfer protocol status information " |
| "provided by the adapter %s " |
| "is not compatible with the device driver. " |
| "Stopping all operations on this adapter. " |
| "(debug info 0x%x).\n", |
| zfcp_get_busid_by_adapter(adapter), |
| qtcb->prefix.prot_status); |
| zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| |
| 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, 120, fsf_req); |
| 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, 121, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_PROGRAMMING_ERROR: |
| ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " |
| "(adapter %s)\n", |
| zfcp_get_busid_by_adapter(fsf_req->adapter)); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| case FSF_SQ_NO_RETRY_POSSIBLE: |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* dealt with in the respective functions */ |
| 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_fsf_req *fsf_req, u8 id, |
| struct fsf_link_down_info *link_down) |
| { |
| struct zfcp_adapter *adapter = fsf_req->adapter; |
| |
| 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, id, fsf_req); |
| } |
| |
| /* |
| * 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); |
| |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (retval) { |
| ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " |
| "environment.\n"); |
| goto failed_req_send; |
| } |
| |
| 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%06x 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: |
| zfcp_erp_port_reopen(port, 0, 101, fsf_req); |
| break; |
| |
| case FSF_STATUS_READ_SUB_ERROR_PORT: |
| zfcp_erp_port_shutdown(port, 0, 122, fsf_req); |
| break; |
| |
| default: |
| ZFCP_LOG_NORMAL("bug: Undefined status subtype received " |
| "for a reopen indication on port with " |
| "d_id 0x%06x on the adapter %s. " |
| "Ignored. (debug info 0x%x)\n", |
| status_buffer->d_id, |
| zfcp_get_busid_by_adapter(adapter), |
| status_buffer->status_subtype); |
| } |
| out: |
| return 0; |
| } |
| |
| /* |
| * 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; |
| struct fsf_bit_error_payload *fsf_bit_error; |
| |
| if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { |
| zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); |
| mempool_free(status_buffer, adapter->pool.data_status_read); |
| zfcp_fsf_req_free(fsf_req); |
| goto out; |
| } |
| |
| 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: |
| fsf_bit_error = (struct fsf_bit_error_payload *) |
| status_buffer->payload; |
| ZFCP_LOG_NORMAL("Warning: bit error threshold data " |
| "received (adapter %s, " |
| "link failures = %i, loss of sync errors = %i, " |
| "loss of signal errors = %i, " |
| "primitive sequence errors = %i, " |
| "invalid transmission word errors = %i, " |
| "CRC errors = %i)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| fsf_bit_error->link_failure_error_count, |
| fsf_bit_error->loss_of_sync_error_count, |
| fsf_bit_error->loss_of_signal_error_count, |
| fsf_bit_error->primitive_sequence_error_count, |
| fsf_bit_error->invalid_transmission_word_error_count, |
| fsf_bit_error->crc_error_count); |
| ZFCP_LOG_INFO("Additional bit error threshold data " |
| "(adapter %s, " |
| "primitive sequence event time-outs = %i, " |
| "elastic buffer overrun errors = %i, " |
| "advertised receive buffer-to-buffer credit = %i, " |
| "current receice buffer-to-buffer credit = %i, " |
| "advertised transmit buffer-to-buffer credit = %i, " |
| "current transmit buffer-to-buffer credit = %i)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| fsf_bit_error->primitive_sequence_event_timeout_count, |
| fsf_bit_error->elastic_buffer_overrun_error_count, |
| fsf_bit_error->advertised_receive_b2b_credit, |
| fsf_bit_error->current_receive_b2b_credit, |
| fsf_bit_error->advertised_transmit_b2b_credit, |
| fsf_bit_error->current_transmit_b2b_credit); |
| break; |
| |
| case FSF_STATUS_READ_LINK_DOWN: |
| switch (status_buffer->status_subtype) { |
| case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: |
| ZFCP_LOG_INFO("Physical link to adapter %s is down\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_fsf_link_down_info_eval(fsf_req, 38, |
| (struct fsf_link_down_info *) |
| &status_buffer->payload); |
| break; |
| case FSF_STATUS_READ_SUB_FDISC_FAILED: |
| ZFCP_LOG_INFO("Local link to adapter %s is down " |
| "due to failed FDISC login\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_fsf_link_down_info_eval(fsf_req, 39, |
| (struct fsf_link_down_info *) |
| &status_buffer->payload); |
| break; |
| case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: |
| ZFCP_LOG_INFO("Local link to adapter %s is down " |
| "due to firmware update on adapter\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL); |
| break; |
| default: |
| ZFCP_LOG_INFO("Local link to adapter %s is down " |
| "due to unknown reason\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL); |
| }; |
| break; |
| |
| case FSF_STATUS_READ_LINK_UP: |
| ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. " |
| "Restarting operations on this adapter\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| /* All ports should be marked as ready to run again */ |
| zfcp_erp_modify_adapter_status(adapter, 30, NULL, |
| ZFCP_STATUS_COMMON_RUNNING, |
| ZFCP_SET); |
| zfcp_erp_adapter_reopen(adapter, |
| ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
| | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 102, fsf_req); |
| break; |
| |
| case FSF_STATUS_READ_NOTIFICATION_LOST: |
| ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: " |
| "adapter %s%s%s%s%s%s%s%s%s\n", |
| zfcp_get_busid_by_adapter(adapter), |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_INCOMING_ELS) ? |
| ", incoming ELS" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_SENSE_DATA) ? |
| ", sense data" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_LINK_STATUS) ? |
| ", link status change" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_PORT_CLOSED) ? |
| ", port close" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ? |
| ", bit error exception" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_ACT_UPDATED) ? |
| ", ACT update" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_ACT_HARDENED) ? |
| ", ACT hardening" : "", |
| (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ? |
| ", adapter feature change" : ""); |
| |
| if (status_buffer->status_subtype & |
| FSF_STATUS_READ_SUB_ACT_UPDATED) |
| zfcp_erp_adapter_access_changed(adapter, 135, fsf_req); |
| break; |
| |
| case FSF_STATUS_READ_CFDC_UPDATED: |
| ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_erp_adapter_access_changed(adapter, 136, fsf_req); |
| break; |
| |
| 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: |
| 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, 103, fsf_req); |
| } |
| } |
| 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; |
| struct zfcp_fsf_req *fsf_req = NULL; |
| unsigned long lock_flags; |
| int retval = 0; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, |
| req_flags, adapter->pool.fsf_req_abort, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Failed to create an abort command " |
| "request for lun 0x%016Lx on port 0x%016Lx " |
| "on adapter %s.\n", |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_adapter(adapter)); |
| goto out; |
| } |
| |
| if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| &unit->status))) |
| goto unit_blocked; |
| |
| 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; |
| |
| zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (!retval) |
| goto out; |
| |
| unit_blocked: |
| zfcp_fsf_req_free(fsf_req); |
| fsf_req = NULL; |
| |
| out: |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| return fsf_req; |
| } |
| |
| /* |
| * 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; |
| union fsf_status_qual *fsf_stat_qual = |
| &new_fsf_req->qtcb->header.fsf_status_qual; |
| |
| if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { |
| /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ |
| goto skip_fsfstatus; |
| } |
| |
| unit = (struct zfcp_unit *) new_fsf_req->data; |
| |
| /* evaluate FSF status in QTCB */ |
| switch (new_fsf_req->qtcb->header.fsf_status) { |
| |
| case FSF_PORT_HANDLE_NOT_VALID: |
| if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { |
| /* |
| * In this case a command that was sent prior to a port |
| * reopen was aborted (handles are different). This is |
| * fine. |
| */ |
| } else { |
| ZFCP_LOG_INFO("Temporary port identifier 0x%x for " |
| "port 0x%016Lx on adapter %s invalid. " |
| "This may happen occasionally.\n", |
| unit->port->handle, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit)); |
| ZFCP_LOG_INFO("status qualifier:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, |
| (char *) &new_fsf_req->qtcb->header. |
| fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| /* Let's hope this sorts out the mess */ |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104, |
| new_fsf_req); |
| new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| break; |
| |
| case FSF_LUN_HANDLE_NOT_VALID: |
| if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { |
| /* |
| * In this case a command that was sent prior to a unit |
| * reopen was aborted (handles are different). |
| * This is fine. |
| */ |
| } else { |
| ZFCP_LOG_INFO |
| ("Warning: Temporary LUN identifier 0x%x of LUN " |
| "0x%016Lx on port 0x%016Lx on adapter %s is " |
| "invalid. This may happen in rare cases. " |
| "Trying to re-establish link.\n", |
| unit->handle, |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit)); |
| ZFCP_LOG_DEBUG("Status qualifier data:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, |
| (char *) &new_fsf_req->qtcb->header. |
| fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| /* Let's hope this sorts out the mess */ |
| zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req); |
| new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| break; |
| |
| case FSF_FCP_COMMAND_DOES_NOT_EXIST: |
| retval = 0; |
| 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)); |
| zfcp_erp_port_boxed(unit->port, 47, new_fsf_req); |
| 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)); |
| zfcp_erp_unit_boxed(unit, 48, new_fsf_req); |
| 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: |
| zfcp_test_link(unit->port); |
| new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* SCSI stack will escalate */ |
| new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_NORMAL |
| ("bug: Wrong status qualifier 0x%x arrived.\n", |
| new_fsf_req->qtcb->header.fsf_status_qual.word[0]); |
| 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); |
| 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; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| if (zfcp_use_one_sbal(ct->req, ct->req_count, |
| ct->resp, ct->resp_count)){ |
| /* both request buffer and response buffer |
| fit into one sbale each */ |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; |
| sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); |
| sbale[2].length = ct->req[0].length; |
| sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); |
| sbale[3].length = ct->resp[0].length; |
| sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; |
| } else if (adapter->adapter_features & |
| FSF_FEATURE_ELS_CT_CHAINED_SBALS) { |
| /* try to use chained SBALs */ |
| bytes = zfcp_qdio_sbals_from_sg(fsf_req, |
| SBAL_FLAGS0_TYPE_WRITE_READ, |
| ct->req, ct->req_count, |
| ZFCP_MAX_SBALS_PER_CT_REQ); |
| if (bytes <= 0) { |
| ZFCP_LOG_INFO("error: creation of CT request failed " |
| "on adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| if (bytes == 0) |
| ret = -ENOMEM; |
| else |
| ret = bytes; |
| |
| goto failed_send; |
| } |
| fsf_req->qtcb->bottom.support.req_buf_length = bytes; |
| fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; |
| bytes = zfcp_qdio_sbals_from_sg(fsf_req, |
| SBAL_FLAGS0_TYPE_WRITE_READ, |
| ct->resp, ct->resp_count, |
| ZFCP_MAX_SBALS_PER_CT_REQ); |
| if (bytes <= 0) { |
| ZFCP_LOG_INFO("error: creation of CT request failed " |
| "on adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| if (bytes == 0) |
| ret = -ENOMEM; |
| else |
| ret = bytes; |
| |
| goto failed_send; |
| } |
| fsf_req->qtcb->bottom.support.resp_buf_length = bytes; |
| } else { |
| /* reject send generic request */ |
| ZFCP_LOG_INFO( |
| "error: microcode does not support chained SBALs," |
| "CT request too big (adapter %s)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| ret = -EOPNOTSUPP; |
| goto failed_send; |
| } |
| |
| /* settings in QTCB */ |
| fsf_req->qtcb->header.port_handle = port->handle; |
| fsf_req->qtcb->bottom.support.service_class = |
| ZFCP_FC_SERVICE_CLASS_DEFAULT; |
| fsf_req->qtcb->bottom.support.timeout = ct->timeout; |
| fsf_req->data = (unsigned long) ct; |
| |
| zfcp_san_dbf_event_ct_request(fsf_req); |
| |
| if (erp_action) { |
| erp_action->fsf_req = fsf_req; |
| fsf_req->erp_action = erp_action; |
| zfcp_erp_start_timer(fsf_req); |
| } else |
| zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
| |
| ret = zfcp_fsf_req_send(fsf_req); |
| if (ret) { |
| ZFCP_LOG_DEBUG("error: initiation of CT request failed " |
| "(adapter %s, port 0x%016Lx)\n", |
| zfcp_get_busid_by_adapter(adapter), port->wwpn); |
| goto failed_send; |
| } |
| |
| 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: |
| ZFCP_LOG_INFO("error: adapter %s does not support fc " |
| "class %d.\n", |
| zfcp_get_busid_by_port(port), |
| ZFCP_FC_SERVICE_CLASS_DEFAULT); |
| /* stop operation for this adapter */ |
| zfcp_erp_adapter_shutdown(adapter, 0, 123, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]){ |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| /* reopening link to port */ |
| zfcp_test_link(port); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* ERP strategy will escalate */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " |
| "arrived.\n", |
| header->fsf_status_qual.word[0]); |
| break; |
| } |
| break; |
| |
| case FSF_ACCESS_DENIED: |
| ZFCP_LOG_NORMAL("access denied, cannot send generic service " |
| "command (adapter %s, port d_id=0x%06x)\n", |
| zfcp_get_busid_by_port(port), port->d_id); |
| for (counter = 0; counter < 2; counter++) { |
| subtable = header->fsf_status_qual.halfword[counter * 2]; |
| rule = header->fsf_status_qual.halfword[counter * 2 + 1]; |
| switch (subtable) { |
| case FSF_SQ_CFDC_SUBTABLE_OS: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_DID: |
| case FSF_SQ_CFDC_SUBTABLE_LUN: |
| ZFCP_LOG_INFO("Access denied (%s rule %d)\n", |
| zfcp_act_subtable_type[subtable], rule); |
| break; |
| } |
| } |
| zfcp_erp_port_access_denied(port, 55, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_GENERIC_COMMAND_REJECTED: |
| ZFCP_LOG_INFO("generic service command rejected " |
| "(adapter %s, port d_id=0x%06x)\n", |
| zfcp_get_busid_by_port(port), port->d_id); |
| ZFCP_LOG_INFO("status qualifier:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, |
| (char *) &header->fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_PORT_HANDLE_NOT_VALID: |
| ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " |
| "0x%016Lx on adapter %s invalid. This may " |
| "happen occasionally.\n", port->handle, |
| port->wwpn, zfcp_get_busid_by_port(port)); |
| ZFCP_LOG_INFO("status qualifier:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, |
| (char *) &header->fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_PORT_BOXED: |
| ZFCP_LOG_INFO("port needs to be reopened " |
| "(adapter %s, port d_id=0x%06x)\n", |
| zfcp_get_busid_by_port(port), port->d_id); |
| zfcp_erp_port_boxed(port, 49, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
| | ZFCP_STATUS_FSFREQ_RETRY; |
| 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); |
| 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%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| goto failed_req; |
| } |
| |
| if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| &els->port->status))) { |
| ret = -EBUSY; |
| goto port_blocked; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| if (zfcp_use_one_sbal(els->req, els->req_count, |
| els->resp, els->resp_count)){ |
| /* both request buffer and response buffer |
| fit into one sbale each */ |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; |
| sbale[2].addr = zfcp_sg_to_address(&els->req[0]); |
| sbale[2].length = els->req[0].length; |
| sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); |
| sbale[3].length = els->resp[0].length; |
| sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; |
| } else if (adapter->adapter_features & |
| FSF_FEATURE_ELS_CT_CHAINED_SBALS) { |
| /* try to use chained SBALs */ |
| bytes = zfcp_qdio_sbals_from_sg(fsf_req, |
| SBAL_FLAGS0_TYPE_WRITE_READ, |
| els->req, els->req_count, |
| ZFCP_MAX_SBALS_PER_ELS_REQ); |
| if (bytes <= 0) { |
| ZFCP_LOG_INFO("error: creation of ELS request failed " |
| "(adapter %s, port d_id: 0x%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| if (bytes == 0) { |
| ret = -ENOMEM; |
| } else { |
| ret = bytes; |
| } |
| goto failed_send; |
| } |
| fsf_req->qtcb->bottom.support.req_buf_length = bytes; |
| fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; |
| bytes = zfcp_qdio_sbals_from_sg(fsf_req, |
| SBAL_FLAGS0_TYPE_WRITE_READ, |
| els->resp, els->resp_count, |
| ZFCP_MAX_SBALS_PER_ELS_REQ); |
| if (bytes <= 0) { |
| ZFCP_LOG_INFO("error: creation of ELS request failed " |
| "(adapter %s, port d_id: 0x%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| if (bytes == 0) { |
| ret = -ENOMEM; |
| } else { |
| ret = bytes; |
| } |
| goto failed_send; |
| } |
| fsf_req->qtcb->bottom.support.resp_buf_length = bytes; |
| } else { |
| /* reject request */ |
| ZFCP_LOG_INFO("error: microcode does not support chained SBALs" |
| ", ELS request too big (adapter %s, " |
| "port d_id: 0x%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| ret = -EOPNOTSUPP; |
| goto failed_send; |
| } |
| |
| /* settings in QTCB */ |
| fsf_req->qtcb->bottom.support.d_id = d_id; |
| fsf_req->qtcb->bottom.support.service_class = |
| ZFCP_FC_SERVICE_CLASS_DEFAULT; |
| fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; |
| fsf_req->data = (unsigned long) els; |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| |
| zfcp_san_dbf_event_els_request(fsf_req); |
| |
| zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
| ret = zfcp_fsf_req_send(fsf_req); |
| if (ret) { |
| ZFCP_LOG_DEBUG("error: initiation of ELS request failed " |
| "(adapter %s, port d_id: 0x%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| goto failed_send; |
| } |
| |
| ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " |
| "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id); |
| goto out; |
| |
| port_blocked: |
| 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: |
| ZFCP_LOG_INFO("error: adapter %s does not support fc " |
| "class %d.\n", |
| zfcp_get_busid_by_adapter(adapter), |
| ZFCP_FC_SERVICE_CLASS_DEFAULT); |
| /* stop operation for this adapter */ |
| zfcp_erp_adapter_shutdown(adapter, 0, 124, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]){ |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| if (port && (send_els->ls_code != ZFCP_LS_ADISC)) |
| zfcp_test_link(port); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| retval = |
| zfcp_handle_els_rjt(header->fsf_status_qual.word[1], |
| (struct zfcp_ls_rjt_par *) |
| &header->fsf_status_qual.word[2]); |
| break; |
| case FSF_SQ_RETRY_IF_POSSIBLE: |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", |
| header->fsf_status_qual.word[0]); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, |
| (char*)header->fsf_status_qual.word, 16); |
| } |
| break; |
| |
| case FSF_ELS_COMMAND_REJECTED: |
| ZFCP_LOG_INFO("ELS has been rejected because command filter " |
| "prohibited sending " |
| "(adapter: %s, port d_id: 0x%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| |
| break; |
| |
| case FSF_PAYLOAD_SIZE_MISMATCH: |
| ZFCP_LOG_INFO( |
| "ELS request size and ELS response size must be either " |
| "both 0, or both greater than 0 " |
| "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| bottom->req_buf_length, |
| bottom->resp_buf_length); |
| break; |
| |
| case FSF_REQUEST_SIZE_TOO_LARGE: |
| ZFCP_LOG_INFO( |
| "Length of the ELS request buffer, " |
| "specified in QTCB bottom, " |
| "exceeds the size of the buffers " |
| "that have been allocated for ELS request data " |
| "(adapter: %s, req_buf_length=%d)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| bottom->req_buf_length); |
| break; |
| |
| case FSF_RESPONSE_SIZE_TOO_LARGE: |
| ZFCP_LOG_INFO( |
| "Length of the ELS response buffer, " |
| "specified in QTCB bottom, " |
| "exceeds the size of the buffers " |
| "that have been allocated for ELS response data " |
| "(adapter: %s, resp_buf_length=%d)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| bottom->resp_buf_length); |
| break; |
| |
| case FSF_SBAL_MISMATCH: |
| /* should never occure, avoided in zfcp_fsf_send_els */ |
| ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " |
| "resp_buf_length=%d)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| bottom->req_buf_length, bottom->resp_buf_length); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ACCESS_DENIED: |
| ZFCP_LOG_NORMAL("access denied, cannot send ELS command " |
| "(adapter %s, port d_id=0x%06x)\n", |
| zfcp_get_busid_by_adapter(adapter), d_id); |
| for (counter = 0; counter < 2; counter++) { |
| subtable = header->fsf_status_qual.halfword[counter * 2]; |
| rule = header->fsf_status_qual.halfword[counter * 2 + 1]; |
| switch (subtable) { |
| case FSF_SQ_CFDC_SUBTABLE_OS: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_DID: |
| case FSF_SQ_CFDC_SUBTABLE_LUN: |
| ZFCP_LOG_INFO("Access denied (%s rule %d)\n", |
| zfcp_act_subtable_type[subtable], rule); |
| break; |
| } |
| } |
| if (port != NULL) |
| zfcp_erp_port_access_denied(port, 56, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| 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); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| |
| skip_fsfstatus: |
| send_els->status = retval; |
| |
| if (send_els->handler) |
| send_els->handler(send_els->handler_data); |
| |
| return retval; |
| } |
| |
| int |
| zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) |
| { |
| volatile struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| struct zfcp_adapter *adapter = erp_action->adapter; |
| unsigned long lock_flags; |
| int retval; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(adapter, |
| FSF_QTCB_EXCHANGE_CONFIG_DATA, |
| ZFCP_REQ_AUTO_CLEANUP, |
| adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not create exchange configuration " |
| "data request for adapter %s.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, |
| lock_flags); |
| return retval; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| fsf_req->qtcb->bottom.config.feature_selection = |
| FSF_FEATURE_CFDC | |
| FSF_FEATURE_LUN_SHARING | |
| FSF_FEATURE_NOTIFICATION_LOST | |
| FSF_FEATURE_UPDATE_ALERT; |
| fsf_req->erp_action = erp_action; |
| erp_action->fsf_req = fsf_req; |
| |
| zfcp_erp_start_timer(fsf_req); |
| retval = zfcp_fsf_req_send(fsf_req); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, |
| lock_flags); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not send exchange configuration " |
| "data command on the adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_fsf_req_free(fsf_req); |
| erp_action->fsf_req = NULL; |
| } |
| else |
| ZFCP_LOG_DEBUG("exchange configuration data request initiated " |
| "(adapter %s)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| |
| return retval; |
| } |
| |
| int |
| zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, |
| struct fsf_qtcb_bottom_config *data) |
| { |
| volatile struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, |
| 0, NULL, &lock_flags, &fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not create exchange configuration " |
| "data request for adapter %s.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, |
| lock_flags); |
| return retval; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| fsf_req->qtcb->bottom.config.feature_selection = |
| FSF_FEATURE_CFDC | |
| FSF_FEATURE_LUN_SHARING | |
| FSF_FEATURE_NOTIFICATION_LOST | |
| FSF_FEATURE_UPDATE_ALERT; |
| |
| if (data) |
| fsf_req->data = (unsigned long) data; |
| |
| zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(fsf_req); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, |
| lock_flags); |
| if (retval) |
| ZFCP_LOG_INFO("error: Could not send exchange configuration " |
| "data command on the adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| else |
| wait_event(fsf_req->completion_wq, |
| fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); |
| |
| zfcp_fsf_req_free(fsf_req); |
| |
| return retval; |
| } |
| |
| /** |
| * zfcp_fsf_exchange_config_evaluate |
| * @fsf_req: fsf_req which belongs to xchg config data request |
| * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) |
| * |
| * returns: -EIO on error, 0 otherwise |
| */ |
| static int |
| zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) |
| { |
| struct fsf_qtcb_bottom_config *bottom; |
| struct zfcp_adapter *adapter = fsf_req->adapter; |
| struct Scsi_Host *shost = adapter->scsi_host; |
| |
| bottom = &fsf_req->qtcb->bottom.config; |
| ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", |
| bottom->low_qtcb_version, bottom->high_qtcb_version); |
| adapter->fsf_lic_version = bottom->lic_version; |
| adapter->adapter_features = bottom->adapter_features; |
| adapter->connection_features = bottom->connection_features; |
| adapter->peer_wwpn = 0; |
| adapter->peer_wwnn = 0; |
| adapter->peer_d_id = 0; |
| |
| if (xchg_ok) { |
| |
| if (fsf_req->data) |
| memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data, |
| bottom, sizeof (struct fsf_qtcb_bottom_config)); |
| |
| fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; |
| fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; |
| fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; |
| fc_host_speed(shost) = bottom->fc_link_speed; |
| fc_host_supported_classes(shost) = |
| FC_COS_CLASS2 | FC_COS_CLASS3; |
| adapter->hydra_version = bottom->adapter_type; |
| if (fc_host_permanent_port_name(shost) == -1) |
| fc_host_permanent_port_name(shost) = |
| fc_host_port_name(shost); |
| if (bottom->fc_topology == FSF_TOPO_P2P) { |
| adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; |
| adapter->peer_wwpn = bottom->plogi_payload.wwpn; |
| adapter->peer_wwnn = bottom->plogi_payload.wwnn; |
| fc_host_port_type(shost) = FC_PORTTYPE_PTP; |
| } else if (bottom->fc_topology == FSF_TOPO_FABRIC) |
| fc_host_port_type(shost) = FC_PORTTYPE_NPORT; |
| else if (bottom->fc_topology == FSF_TOPO_AL) |
| fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; |
| else |
| fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; |
| } else { |
| fc_host_node_name(shost) = 0; |
| fc_host_port_name(shost) = 0; |
| fc_host_port_id(shost) = 0; |
| fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; |
| adapter->hydra_version = 0; |
| } |
| |
| if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { |
| adapter->hardware_version = bottom->hardware_version; |
| memcpy(fc_host_serial_number(shost), bottom->serial_number, |
| min(FC_SERIAL_NUMBER_SIZE, 17)); |
| EBCASC(fc_host_serial_number(shost), |
| min(FC_SERIAL_NUMBER_SIZE, 17)); |
| } |
| |
| ZFCP_LOG_NORMAL("The adapter %s reported the following " |
| "characteristics:\n" |
| "WWNN 0x%016Lx, " |
| "WWPN 0x%016Lx, " |
| "S_ID 0x%06x,\n" |
| "adapter version 0x%x, " |
| "LIC version 0x%x, " |
| "FC link speed %d Gb/s\n", |
| zfcp_get_busid_by_adapter(adapter), |
| (wwn_t) fc_host_node_name(shost), |
| (wwn_t) fc_host_port_name(shost), |
| fc_host_port_id(shost), |
| adapter->hydra_version, |
| adapter->fsf_lic_version, |
| fc_host_speed(shost)); |
| if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { |
| ZFCP_LOG_NORMAL("error: the adapter %s " |
| "only supports newer control block " |
| "versions in comparison to this device " |
| "driver (try updated device driver)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req); |
| return -EIO; |
| } |
| if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { |
| ZFCP_LOG_NORMAL("error: the adapter %s " |
| "only supports older control block " |
| "versions than this device driver uses" |
| "(consider a microcode upgrade)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| /** |
| * function: zfcp_fsf_exchange_config_data_handler |
| * |
| * purpose: is called for finished Exchange Configuration Data command |
| * |
| * returns: |
| */ |
| static int |
| zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) |
| { |
| struct fsf_qtcb_bottom_config *bottom; |
| struct zfcp_adapter *adapter = fsf_req->adapter; |
| struct fsf_qtcb *qtcb = fsf_req->qtcb; |
| |
| if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return -EIO; |
| |
| switch (qtcb->header.fsf_status) { |
| |
| case FSF_GOOD: |
| if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) |
| return -EIO; |
| |
| switch (fc_host_port_type(adapter->scsi_host)) { |
| case FC_PORTTYPE_PTP: |
| ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " |
| "configuration detected at adapter %s\n" |
| "Peer WWNN 0x%016llx, " |
| "peer WWPN 0x%016llx, " |
| "peer d_id 0x%06x\n", |
| zfcp_get_busid_by_adapter(adapter), |
| adapter->peer_wwnn, |
| adapter->peer_wwpn, |
| adapter->peer_d_id); |
| break; |
| case FC_PORTTYPE_NLPORT: |
| ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " |
| "topology detected at adapter %s " |
| "unsupported, shutting down adapter\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req); |
| return -EIO; |
| case FC_PORTTYPE_NPORT: |
| ZFCP_LOG_NORMAL("Switched fabric fibrechannel " |
| "network detected at adapter %s.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| break; |
| default: |
| ZFCP_LOG_NORMAL("bug: The fibrechannel topology " |
| "reported by the exchange " |
| "configuration command for " |
| "the adapter %s is not " |
| "of a type known to the zfcp " |
| "driver, shutting down adapter\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req); |
| return -EIO; |
| } |
| bottom = &qtcb->bottom.config; |
| if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { |
| ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " |
| "allowed by the adapter %s " |
| "is lower than the minimum " |
| "required by the driver (%ld bytes).\n", |
| bottom->max_qtcb_size, |
| zfcp_get_busid_by_adapter(adapter), |
| sizeof(struct fsf_qtcb)); |
| zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req); |
| return -EIO; |
| } |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
| &adapter->status); |
| break; |
| case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: |
| if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) |
| return -EIO; |
| |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
| &adapter->status); |
| |
| zfcp_fsf_link_down_info_eval(fsf_req, 42, |
| &qtcb->header.fsf_status_qual.link_down_info); |
| break; |
| default: |
| zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| /** |
| * zfcp_fsf_exchange_port_data - request information about local port |
| * @erp_action: ERP action for the adapter for which port data is requested |
| */ |
| int |
| zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) |
| { |
| volatile struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| struct zfcp_adapter *adapter = erp_action->adapter; |
| unsigned long lock_flags; |
| int retval; |
| |
| if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { |
| ZFCP_LOG_INFO("error: exchange port data " |
| "command not supported by adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| return -EOPNOTSUPP; |
| } |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, |
| ZFCP_REQ_AUTO_CLEANUP, |
| adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Out of resources. Could not create an " |
| "exchange port data request for " |
| "the adapter %s.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, |
| lock_flags); |
| return retval; |
| } |
| |
| 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; |
| |
| erp_action->fsf_req = fsf_req; |
| fsf_req->erp_action = erp_action; |
| zfcp_erp_start_timer(fsf_req); |
| |
| retval = zfcp_fsf_req_send(fsf_req); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| |
| 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); |
| erp_action->fsf_req = NULL; |
| } |
| else |
| ZFCP_LOG_DEBUG("exchange port data request initiated " |
| "(adapter %s)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| return retval; |
| } |
| |
| |
| /** |
| * zfcp_fsf_exchange_port_data_sync - request information about local port |
| * and wait until information is ready |
| */ |
| int |
| zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, |
| struct fsf_qtcb_bottom_port *data) |
| { |
| volatile struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval; |
| |
| if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { |
| ZFCP_LOG_INFO("error: exchange port data " |
| "command not supported by adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| return -EOPNOTSUPP; |
| } |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, |
| 0, NULL, &lock_flags, &fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Out of resources. Could not create an " |
| "exchange port data request for " |
| "the adapter %s.\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, |
| lock_flags); |
| return retval; |
| } |
| |
| 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; |
| |
| zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(fsf_req); |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| |
| if (retval) |
| ZFCP_LOG_INFO("error: Could not send an exchange port data " |
| "command on the adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| else |
| wait_event(fsf_req->completion_wq, |
| fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); |
| |
| zfcp_fsf_req_free(fsf_req); |
| |
| return retval; |
| } |
| |
| /** |
| * zfcp_fsf_exchange_port_evaluate |
| * @fsf_req: fsf_req which belongs to xchg port data request |
| * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) |
| */ |
| static void |
| zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) |
| { |
| struct zfcp_adapter *adapter; |
| struct fsf_qtcb_bottom_port *bottom; |
| struct Scsi_Host *shost; |
| |
| adapter = fsf_req->adapter; |
| bottom = &fsf_req->qtcb->bottom.port; |
| shost = adapter->scsi_host; |
| |
| if (fsf_req->data) |
| memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom, |
| sizeof(struct fsf_qtcb_bottom_port)); |
| |
| if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) |
| fc_host_permanent_port_name(shost) = bottom->wwpn; |
| else |
| fc_host_permanent_port_name(shost) = fc_host_port_name(shost); |
| fc_host_maxframe_size(shost) = bottom->maximum_frame_size; |
| fc_host_supported_speeds(shost) = bottom->supported_speed; |
| } |
| |
| /** |
| * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request |
| * @fsf_req: pointer to struct zfcp_fsf_req |
| */ |
| static void |
| zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) |
| { |
| struct zfcp_adapter *adapter; |
| struct fsf_qtcb *qtcb; |
| |
| adapter = fsf_req->adapter; |
| qtcb = fsf_req->qtcb; |
| |
| if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| switch (qtcb->header.fsf_status) { |
| case FSF_GOOD: |
| zfcp_fsf_exchange_port_evaluate(fsf_req, 1); |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); |
| break; |
| case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: |
| zfcp_fsf_exchange_port_evaluate(fsf_req, 0); |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); |
| zfcp_fsf_link_down_info_eval(fsf_req, 43, |
| &qtcb->header.fsf_status_qual.link_down_info); |
| break; |
| } |
| } |
| |
| |
| /* |
| * function: zfcp_fsf_open_port |
| * |
| * purpose: |
| * |
| * returns: address of initiated FSF request |
| * NULL - request could not be initiated |
| */ |
| int |
| zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) |
| { |
| volatile struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval = 0; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(erp_action->adapter, |
| FSF_QTCB_OPEN_PORT_WITH_DID, |
| ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, |
| erp_action->adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create open port request " |
| "for port 0x%016Lx on adapter %s.\n", |
| erp_action->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| goto out; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; |
| atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); |
| fsf_req->data = (unsigned long) erp_action->port; |
| fsf_req->erp_action = erp_action; |
| erp_action->fsf_req = fsf_req; |
| |
| zfcp_erp_start_timer(fsf_req); |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not send open port request for " |
| "port 0x%016Lx on adapter %s.\n", |
| erp_action->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| zfcp_fsf_req_free(fsf_req); |
| erp_action->fsf_req = NULL; |
| goto out; |
| } |
| |
| 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)); |
| /* |
| * This is a bug, however operation should continue normally |
| * if it is simply ignored |
| */ |
| break; |
| |
| case FSF_ACCESS_DENIED: |
| ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " |
| "on adapter %s\n", |
| port->wwpn, zfcp_get_busid_by_port(port)); |
| for (counter = 0; counter < 2; counter++) { |
| subtable = header->fsf_status_qual.halfword[counter * 2]; |
| rule = header->fsf_status_qual.halfword[counter * 2 + 1]; |
| switch (subtable) { |
| case FSF_SQ_CFDC_SUBTABLE_OS: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_DID: |
| case FSF_SQ_CFDC_SUBTABLE_LUN: |
| ZFCP_LOG_INFO("Access denied (%s rule %d)\n", |
| zfcp_act_subtable_type[subtable], rule); |
| break; |
| } |
| } |
| zfcp_erp_port_access_denied(port, 57, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: |
| ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " |
| "The remote port 0x%016Lx on adapter %s " |
| "could not be opened. Disabling it.\n", |
| port->wwpn, zfcp_get_busid_by_port(port)); |
| zfcp_erp_port_failed(port, 31, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| /* ERP strategy will escalate */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* ERP strategy will escalate */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_NO_RETRY_POSSIBLE: |
| ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " |
| "adapter %s could not be opened. " |
| "Disabling it.\n", |
| port->wwpn, |
| zfcp_get_busid_by_port(port)); |
| zfcp_erp_port_failed(port, 32, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_NORMAL |
| ("bug: Wrong status qualifier 0x%x arrived.\n", |
| header->fsf_status_qual.word[0]); |
| 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 < |
| sizeof (struct fsf_plogi)) { |
| ZFCP_LOG_INFO( |
| "warning: insufficient length of " |
| "PLOGI payload (%i)\n", |
| fsf_req->qtcb->bottom.support.els1_length); |
| /* skip sanity check and assume wwpn is ok */ |
| } else { |
| if (plogi->serv_param.wwpn != port->wwpn) { |
| ZFCP_LOG_INFO("warning: d_id of port " |
| "0x%016Lx changed during " |
| "open\n", port->wwpn); |
| atomic_clear_mask( |
| ZFCP_STATUS_PORT_DID_DID, |
| &port->status); |
| } else { |
| port->wwnn = plogi->serv_param.wwnn; |
| zfcp_plogi_evaluate(port, plogi); |
| } |
| } |
| } |
| 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); |
| 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; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval = 0; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(erp_action->adapter, |
| FSF_QTCB_CLOSE_PORT, |
| ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, |
| erp_action->adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create a close port request " |
| "for port 0x%016Lx on adapter %s.\n", |
| erp_action->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| 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; |
| |
| atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); |
| fsf_req->data = (unsigned long) erp_action->port; |
| fsf_req->erp_action = erp_action; |
| fsf_req->qtcb->header.port_handle = erp_action->port->handle; |
| fsf_req->erp_action = erp_action; |
| erp_action->fsf_req = fsf_req; |
| |
| zfcp_erp_start_timer(fsf_req); |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not send a close port request for " |
| "port 0x%016Lx on adapter %s.\n", |
| erp_action->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| zfcp_fsf_req_free(fsf_req); |
| 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)); |
| zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req); |
| 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, 33, fsf_req, |
| ZFCP_STATUS_COMMON_OPEN, |
| ZFCP_CLEAR); |
| retval = 0; |
| break; |
| |
| default: |
| ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " |
| "(debug info 0x%x)\n", |
| fsf_req->qtcb->header.fsf_status); |
| break; |
| } |
| |
| skip_fsfstatus: |
| 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) |
| { |
| volatile struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval = 0; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(erp_action->adapter, |
| FSF_QTCB_CLOSE_PHYSICAL_PORT, |
| ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, |
| erp_action->adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create close physical port " |
| "request (adapter %s, port 0x%016Lx)\n", |
| zfcp_get_busid_by_adapter(erp_action->adapter), |
| erp_action->port->wwpn); |
| |
| 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; |
| |
| /* mark port as being closed */ |
| atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, |
| &erp_action->port->status); |
| /* save a pointer to this port */ |
| fsf_req->data = (unsigned long) erp_action->port; |
| fsf_req->qtcb->header.port_handle = erp_action->port->handle; |
| fsf_req->erp_action = erp_action; |
| erp_action->fsf_req = fsf_req; |
| |
| zfcp_erp_start_timer(fsf_req); |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not send close physical port " |
| "request (adapter %s, port 0x%016Lx)\n", |
| zfcp_get_busid_by_adapter(erp_action->adapter), |
| erp_action->port->wwpn); |
| zfcp_fsf_req_free(fsf_req); |
| 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)); |
| zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req); |
| 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; |
| } |
| } |
| zfcp_erp_port_access_denied(port, 58, fsf_req); |
| 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)); |
| zfcp_erp_port_boxed(port, 50, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
| ZFCP_STATUS_FSFREQ_RETRY; |
| |
| /* can't use generic zfcp_erp_modify_port_status because |
| * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ |
| atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); |
| list_for_each_entry(unit, &port->unit_list_head, list) |
| atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, |
| &unit->status); |
| break; |
| |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| /* This will now be escalated by ERP */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* ERP strategy will escalate */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_NORMAL |
| ("bug: Wrong status qualifier 0x%x arrived.\n", |
| header->fsf_status_qual.word[0]); |
| 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); |
| 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; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval = 0; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(erp_action->adapter, |
| FSF_QTCB_OPEN_LUN, |
| ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, |
| erp_action->adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create open unit request for " |
| "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", |
| erp_action->unit->fcp_lun, |
| erp_action->unit->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| goto out; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| fsf_req->qtcb->header.port_handle = erp_action->port->handle; |
| fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; |
| if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) |
| fsf_req->qtcb->bottom.support.option = |
| FSF_OPEN_LUN_SUPPRESS_BOXING; |
| atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); |
| fsf_req->data = (unsigned long) erp_action->unit; |
| fsf_req->erp_action = erp_action; |
| erp_action->fsf_req = fsf_req; |
| |
| zfcp_erp_start_timer(fsf_req); |
| retval = zfcp_fsf_req_send(erp_action->fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not send an open unit request " |
| "on the adapter %s, port 0x%016Lx for " |
| "unit 0x%016Lx\n", |
| zfcp_get_busid_by_adapter(erp_action->adapter), |
| erp_action->port->wwpn, |
| erp_action->unit->fcp_lun); |
| zfcp_fsf_req_free(fsf_req); |
| 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_COMMON_ACCESS_BOXED | |
| 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)); |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req); |
| 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)); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ACCESS_DENIED: |
| ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " |
| "remote port 0x%016Lx on adapter %s\n", |
| unit->fcp_lun, unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit)); |
| for (counter = 0; counter < 2; counter++) { |
| subtable = header->fsf_status_qual.halfword[counter * 2]; |
| rule = header->fsf_status_qual.halfword[counter * 2 + 1]; |
| switch (subtable) { |
| case FSF_SQ_CFDC_SUBTABLE_OS: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_DID: |
| case FSF_SQ_CFDC_SUBTABLE_LUN: |
| ZFCP_LOG_INFO("Access denied (%s rule %d)\n", |
| zfcp_act_subtable_type[subtable], rule); |
| break; |
| } |
| } |
| zfcp_erp_unit_access_denied(unit, 59, fsf_req); |
| 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)); |
| zfcp_erp_port_boxed(unit->port, 51, fsf_req); |
| 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)); |
| zfcp_erp_unit_access_denied(unit, 60, fsf_req); |
| atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); |
| atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: |
| ZFCP_LOG_INFO("error: The adapter ran out of resources. " |
| "There is no handle (temporary port identifier) " |
| "available for unit 0x%016Lx on port 0x%016Lx " |
| "on adapter %s\n", |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit)); |
| zfcp_erp_unit_failed(unit, 34, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| /* Re-establish link to port */ |
| zfcp_test_link(unit->port); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* ERP strategy will escalate */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_NORMAL |
| ("bug: Wrong status qualifier 0x%x arrived.\n", |
| header->fsf_status_qual.word[0]); |
| } |
| 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, 35, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req); |
| } else if (!exclusive && readwrite) { |
| ZFCP_LOG_NORMAL("shared access of read-write " |
| "unit not supported\n"); |
| zfcp_erp_unit_failed(unit, 36, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req); |
| } |
| } |
| |
| retval = 0; |
| break; |
| |
| default: |
| ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " |
| "(debug info 0x%x)\n", |
| header->fsf_status); |
| break; |
| } |
| |
| skip_fsfstatus: |
| 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; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long lock_flags; |
| int retval = 0; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(erp_action->adapter, |
| FSF_QTCB_CLOSE_LUN, |
| ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, |
| erp_action->adapter->pool.fsf_req_erp, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create close unit request for " |
| "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", |
| erp_action->unit->fcp_lun, |
| erp_action->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| goto out; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| fsf_req->qtcb->header.port_handle = erp_action->port->handle; |
| fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; |
| atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); |
| fsf_req->data = (unsigned long) erp_action->unit; |
| fsf_req->erp_action = erp_action; |
| erp_action->fsf_req = fsf_req; |
| |
| zfcp_erp_start_timer(fsf_req); |
| retval = zfcp_fsf_req_send(erp_action->fsf_req); |
| if (retval) { |
| ZFCP_LOG_INFO("error: Could not send a close unit request for " |
| "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", |
| erp_action->unit->fcp_lun, |
| erp_action->port->wwpn, |
| zfcp_get_busid_by_adapter(erp_action->adapter)); |
| zfcp_fsf_req_free(fsf_req); |
| 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)); |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req); |
| 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)); |
| zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req); |
| 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)); |
| zfcp_erp_port_boxed(unit->port, 52, fsf_req); |
| 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 */ |
| zfcp_test_link(unit->port); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* ERP strategy will escalate */ |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| default: |
| ZFCP_LOG_NORMAL |
| ("bug: Wrong status qualifier 0x%x arrived.\n", |
| fsf_req->qtcb->header.fsf_status_qual.word[0]); |
| break; |
| } |
| break; |
| |
| case FSF_GOOD: |
| ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " |
| "closed, port handle 0x%x\n", |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit), |
| unit->handle); |
| /* mark unit as closed */ |
| atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); |
| retval = 0; |
| break; |
| |
| default: |
| ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " |
| "(debug info 0x%x)\n", |
| fsf_req->qtcb->header.fsf_status); |
| break; |
| } |
| |
| skip_fsfstatus: |
| 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, |
| int use_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; |
| } |
| |
| if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| &unit->status))) { |
| retval = -EBUSY; |
| goto unit_blocked; |
| } |
| |
| zfcp_unit_get(unit); |
| fsf_req->unit = unit; |
| |
| /* associate FSF request with SCSI request (for look up on abort) */ |
| scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id; |
| |
| /* associate SCSI command with FSF request */ |
| fsf_req->data = (unsigned long) scsi_cmnd; |
| |
| /* set handles of unit and its parent port in QTCB */ |
| fsf_req->qtcb->header.lun_handle = unit->handle; |
| fsf_req->qtcb->header.port_handle = unit->port->handle; |
| |
| /* FSF does not define the structure of the FCP_CMND IU */ |
| fcp_cmnd_iu = (struct fcp_cmnd_iu *) |
| &(fsf_req->qtcb->bottom.io.fcp_cmnd); |
| |
| /* |
| * set depending on data direction: |
| * data direction bits in SBALE (SB Type) |
| * data direction bits in QTCB |
| * data direction bits in FCP_CMND IU |
| */ |
| switch (scsi_cmnd->sc_data_direction) { |
| case DMA_NONE: |
| fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; |
| /* |
| * FIXME(qdio): |
| * what is the correct type for commands |
| * without 'real' data buffers? |
| */ |
| sbtype = SBAL_FLAGS0_TYPE_READ; |
| break; |
| case DMA_FROM_DEVICE: |
| fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; |
| sbtype = SBAL_FLAGS0_TYPE_READ; |
| fcp_cmnd_iu->rddata = 1; |
| break; |
| case DMA_TO_DEVICE: |
| fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; |
| sbtype = SBAL_FLAGS0_TYPE_WRITE; |
| fcp_cmnd_iu->wddata = 1; |
| break; |
| case DMA_BIDIRECTIONAL: |
| default: |
| /* |
| * dummy, catch this condition earlier |
| * in zfcp_scsi_queuecommand |
| */ |
| goto failed_scsi_cmnd; |
| } |
| |
| /* set FC service class in QTCB (3 per default) */ |
| fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; |
| |
| /* set FCP_LUN in FCP_CMND IU in QTCB */ |
| fcp_cmnd_iu->fcp_lun = unit->fcp_lun; |
| |
| mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; |
| |
| /* set task attributes in FCP_CMND IU in QTCB */ |
| if (likely((scsi_cmnd->device->simple_tags) || |
| (atomic_test_mask(mask, &unit->status)))) |
| fcp_cmnd_iu->task_attribute = SIMPLE_Q; |
| else |
| fcp_cmnd_iu->task_attribute = UNTAGGED; |
| |
| /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ |
| if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { |
| fcp_cmnd_iu->add_fcp_cdb_length |
| = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; |
| ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " |
| "additional FCP_CDB length is 0x%x " |
| "(shifted right 2 bits)\n", |
| scsi_cmnd->cmd_len, |
| fcp_cmnd_iu->add_fcp_cdb_length); |
| } |
| /* |
| * copy SCSI CDB (including additional length, if any) to |
| * FCP_CDB in FCP_CMND IU in QTCB |
| */ |
| memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); |
| |
| /* FCP CMND IU length in QTCB */ |
| fsf_req->qtcb->bottom.io.fcp_cmnd_length = |
| sizeof (struct fcp_cmnd_iu) + |
| fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); |
| |
| /* generate SBALEs from data buffer */ |
| real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); |
| if (unlikely(real_bytes < 0)) { |
| if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { |
| ZFCP_LOG_DEBUG( |
| "Data did not fit into available buffer(s), " |
| "waiting for more...\n"); |
| retval = -EIO; |
| } else { |
| ZFCP_LOG_NORMAL("error: No truncation implemented but " |
| "required. Shutting down unit " |
| "(adapter %s, port 0x%016Lx, " |
| "unit 0x%016Lx)\n", |
| zfcp_get_busid_by_unit(unit), |
| unit->port->wwpn, |
| unit->fcp_lun); |
| zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req); |
| retval = -EINVAL; |
| } |
| goto no_fit; |
| } |
| |
| /* 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); |
| |
| if (use_timer) |
| zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
| |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (unlikely(retval < 0)) { |
| ZFCP_LOG_INFO("error: Could not send FCP command request " |
| "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", |
| zfcp_get_busid_by_adapter(adapter), |
| unit->port->wwpn, |
| unit->fcp_lun); |
| goto send_failed; |
| } |
| |
| ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " |
| "port 0x%016Lx, unit 0x%016Lx)\n", |
| zfcp_get_busid_by_adapter(adapter), |
| unit->port->wwpn, |
| unit->fcp_lun); |
| goto success; |
| |
| send_failed: |
| no_fit: |
| failed_scsi_cmnd: |
| zfcp_unit_put(unit); |
| unit_blocked: |
| zfcp_fsf_req_free(fsf_req); |
| fsf_req = NULL; |
| scsi_cmnd->host_scribble = NULL; |
| success: |
| failed_req_create: |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| return retval; |
| } |
| |
| struct zfcp_fsf_req * |
| zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, |
| struct zfcp_unit *unit, |
| u8 tm_flags, int req_flags) |
| { |
| struct zfcp_fsf_req *fsf_req = NULL; |
| int retval = 0; |
| struct fcp_cmnd_iu *fcp_cmnd_iu; |
| unsigned long lock_flags; |
| volatile struct qdio_buffer_element *sbale; |
| |
| /* setup new FSF request */ |
| retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, |
| adapter->pool.fsf_req_scsi, |
| &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create FCP command (task " |
| "management) request for adapter %s, port " |
| " 0x%016Lx, unit 0x%016Lx.\n", |
| zfcp_get_busid_by_adapter(adapter), |
| unit->port->wwpn, unit->fcp_lun); |
| goto out; |
| } |
| |
| if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| &unit->status))) |
| goto unit_blocked; |
| |
| /* |
| * Used to decide on proper handler in the return path, |
| * could be either zfcp_fsf_send_fcp_command_task_handler or |
| * zfcp_fsf_send_fcp_command_task_management_handler */ |
| |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; |
| |
| /* |
| * hold a pointer to the unit being target of this |
| * task management request |
| */ |
| fsf_req->data = (unsigned long) unit; |
| |
| /* set FSF related fields in QTCB */ |
| fsf_req->qtcb->header.lun_handle = unit->handle; |
| fsf_req->qtcb->header.port_handle = unit->port->handle; |
| fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; |
| fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; |
| fsf_req->qtcb->bottom.io.fcp_cmnd_length = |
| sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| /* set FCP related fields in FCP_CMND IU in QTCB */ |
| fcp_cmnd_iu = (struct fcp_cmnd_iu *) |
| &(fsf_req->qtcb->bottom.io.fcp_cmnd); |
| fcp_cmnd_iu->fcp_lun = unit->fcp_lun; |
| fcp_cmnd_iu->task_management_flags = tm_flags; |
| |
| zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (!retval) |
| goto out; |
| |
| unit_blocked: |
| zfcp_fsf_req_free(fsf_req); |
| fsf_req = NULL; |
| |
| out: |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| return fsf_req; |
| } |
| |
| /* |
| * 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)); |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_LUN_HANDLE_NOT_VALID: |
| ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " |
| "0x%016Lx on port 0x%016Lx on adapter %s is " |
| "invalid. This may happen occasionally.\n", |
| unit->handle, |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit)); |
| ZFCP_LOG_NORMAL("Status qualifier data:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, |
| (char *) &header->fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_HANDLE_MISMATCH: |
| ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " |
| "unexpectedly. (adapter %s, port 0x%016Lx, " |
| "unit 0x%016Lx)\n", |
| unit->port->handle, |
| zfcp_get_busid_by_unit(unit), |
| unit->port->wwpn, |
| unit->fcp_lun); |
| ZFCP_LOG_NORMAL("status qualifier:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, |
| (char *) &header->fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_SERVICE_CLASS_NOT_SUPPORTED: |
| ZFCP_LOG_INFO("error: adapter %s does not support fc " |
| "class %d.\n", |
| zfcp_get_busid_by_unit(unit), |
| ZFCP_FC_SERVICE_CLASS_DEFAULT); |
| /* stop operation for this adapter */ |
| zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 132, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_FCPLUN_NOT_VALID: |
| ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " |
| "adapter %s does not have correct unit " |
| "handle 0x%x\n", |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit), |
| unit->handle); |
| ZFCP_LOG_DEBUG("status qualifier:\n"); |
| ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, |
| (char *) &header->fsf_status_qual, |
| sizeof (union fsf_status_qual)); |
| zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_ACCESS_DENIED: |
| ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " |
| "unit 0x%016Lx on port 0x%016Lx on " |
| "adapter %s\n", unit->fcp_lun, unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit)); |
| for (counter = 0; counter < 2; counter++) { |
| subtable = header->fsf_status_qual.halfword[counter * 2]; |
| rule = header->fsf_status_qual.halfword[counter * 2 + 1]; |
| switch (subtable) { |
| case FSF_SQ_CFDC_SUBTABLE_OS: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: |
| case FSF_SQ_CFDC_SUBTABLE_PORT_DID: |
| case FSF_SQ_CFDC_SUBTABLE_LUN: |
| ZFCP_LOG_INFO("Access denied (%s rule %d)\n", |
| zfcp_act_subtable_type[subtable], rule); |
| break; |
| } |
| } |
| zfcp_erp_unit_access_denied(unit, 61, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_DIRECTION_INDICATOR_NOT_VALID: |
| ZFCP_LOG_INFO("bug: Invalid data direction given for unit " |
| "0x%016Lx on port 0x%016Lx on adapter %s " |
| "(debug info %d)\n", |
| unit->fcp_lun, |
| unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit), |
| fsf_req->qtcb->bottom.io.data_direction); |
| /* stop operation for this adapter */ |
| zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_CMND_LENGTH_NOT_VALID: |
| ZFCP_LOG_NORMAL |
| ("bug: An invalid control-data-block length field " |
| "was found in a command for unit 0x%016Lx on port " |
| "0x%016Lx on adapter %s " "(debug info %d)\n", |
| unit->fcp_lun, unit->port->wwpn, |
| zfcp_get_busid_by_unit(unit), |
| fsf_req->qtcb->bottom.io.fcp_cmnd_length); |
| /* stop operation for this adapter */ |
| zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_PORT_BOXED: |
| ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " |
| "needs to be reopened\n", |
| unit->port->wwpn, zfcp_get_busid_by_unit(unit)); |
| zfcp_erp_port_boxed(unit->port, 53, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
| ZFCP_STATUS_FSFREQ_RETRY; |
| break; |
| |
| case FSF_LUN_BOXED: |
| ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " |
| "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", |
| zfcp_get_busid_by_unit(unit), |
| unit->port->wwpn, unit->fcp_lun); |
| zfcp_erp_unit_boxed(unit, 54, fsf_req); |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
| | ZFCP_STATUS_FSFREQ_RETRY; |
| break; |
| |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| /* re-establish link to port */ |
| zfcp_test_link(unit->port); |
| break; |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| /* FIXME(hw) need proper specs for proper action */ |
| /* let scsi stack deal with retries and escalation */ |
| break; |
| default: |
| ZFCP_LOG_NORMAL |
| ("Unknown status qualifier 0x%x arrived.\n", |
| header->fsf_status_qual.word[0]); |
| break; |
| } |
| fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| |
| case FSF_GOOD: |
| break; |
| |
| case FSF_FCP_RSP_AVAILABLE: |
| 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)); |
| |
| scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid); |
| if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) < |
| scpnt->underflow) |
| set_host_byte(&scpnt->result, DID_ERROR); |
| } |
| |
| 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; |
| |
| 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; |
| unsigned long lock_flags; |
| int req_flags = 0; |
| int direction; |
| int retval = 0; |
| |
| if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) { |
| ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| retval = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| switch (fsf_command) { |
| |
| case FSF_QTCB_DOWNLOAD_CONTROL_FILE: |
| direction = SBAL_FLAGS0_TYPE_WRITE; |
| if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && |
| (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) |
| req_flags = ZFCP_WAIT_FOR_SBAL; |
| break; |
| |
| case FSF_QTCB_UPLOAD_CONTROL_FILE: |
| direction = SBAL_FLAGS0_TYPE_READ; |
| break; |
| |
| default: |
| ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); |
| retval = -EINVAL; |
| goto out; |
| } |
| |
| retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, |
| NULL, &lock_flags, &fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("error: Could not create FSF request for the " |
| "adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| retval = -EPERM; |
| goto unlock_queue_lock; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); |
| sbale[0].flags |= direction; |
| |
| bottom = &fsf_req->qtcb->bottom.support; |
| bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; |
| bottom->option = option; |
| |
| if (sg_list->count > 0) { |
| int bytes; |
| |
| bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, |
| sg_list->sg, sg_list->count, |
| ZFCP_MAX_SBALS_PER_REQ); |
| if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { |
| ZFCP_LOG_INFO( |
| "error: Could not create sufficient number of " |
| "SBALS for an FSF request to the adapter %s\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| retval = -ENOMEM; |
| goto free_fsf_req; |
| } |
| } else |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(fsf_req); |
| if (retval < 0) { |
| ZFCP_LOG_INFO("initiation of cfdc up/download failed" |
| "(adapter %s)\n", |
| zfcp_get_busid_by_adapter(adapter)); |
| retval = -EPERM; |
| goto free_fsf_req; |
| } |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| |
| ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " |
| "adapter %s\n", |
| fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? |
| "download" : "upload", |
| zfcp_get_busid_by_adapter(adapter)); |
| |
| wait_event(fsf_req->completion_wq, |
| fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); |
| |
| *fsf_req_ptr = fsf_req; |
| goto out; |
| |
| free_fsf_req: |
| zfcp_fsf_req_free(fsf_req); |
| unlock_queue_lock: |
| write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); |
| out: |
| return retval; |
| } |
| |
| |
| /* |
| * 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)); |
| 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 void |
| zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) |
| { |
| if (likely(fsf_req->qtcb != NULL)) { |
| fsf_req->qtcb->prefix.req_seq_no = |
| fsf_req->adapter->fsf_req_seq_no; |
| fsf_req->qtcb->prefix.req_id = fsf_req->req_id; |
| fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; |
| fsf_req->qtcb->prefix.qtcb_type = |
| fsf_qtcb_type[fsf_req->fsf_command]; |
| fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; |
| fsf_req->qtcb->header.req_handle = fsf_req->req_id; |
| fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; |
| } |
| } |
| |
| /** |
| * 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; |
| INIT_LIST_HEAD(&fsf_req->list); |
| init_timer(&fsf_req->timer); |
| |
| /* 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; |
| |
| /* this is serialized (we are holding req_queue-lock of adapter) */ |
| if (adapter->req_no == 0) |
| adapter->req_no++; |
| fsf_req->req_id = adapter->req_no++; |
| |
| zfcp_fsf_req_qtcb_init(fsf_req); |
| |
| /* |
| * 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 = (void *) fsf_req->req_id; |
| sbale[0].flags |= SBAL_FLAGS0_COMMAND; |
| if (likely(fsf_req->qtcb != NULL)) { |
| sbale[1].addr = (void *) fsf_req->qtcb; |
| sbale[1].length = sizeof(struct fsf_qtcb); |
| } |
| |
| 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 zfcp_adapter *adapter; |
| struct zfcp_qdio_queue *req_queue; |
| volatile struct qdio_buffer_element *sbale; |
| int inc_seq_no; |
| int new_distance_from_int; |
| int retval = 0; |
| |
| 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 into hash table */ |
| spin_lock(&adapter->req_list_lock); |
| zfcp_reqlist_add(adapter, fsf_req); |
| spin_unlock(&adapter->req_list_lock); |
| |
| inc_seq_no = (fsf_req->qtcb != NULL); |
| |
| 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; |
| del_timer(&fsf_req->timer); |
| spin_lock(&adapter->req_list_lock); |
| zfcp_reqlist_remove(adapter, fsf_req); |
| spin_unlock(&adapter->req_list_lock); |
| /* undo changes in request queue made for this request */ |
| zfcp_qdio_zero_sbals(req_queue->buffer, |
| fsf_req->sbal_first, fsf_req->sbal_number); |
| atomic_add(fsf_req->sbal_number, &req_queue->free_count); |
| req_queue->free_index -= fsf_req->sbal_number; |
| req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; |
| req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ |
| zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req); |
| } else { |
| req_queue->distance_from_int = new_distance_from_int; |
| /* |
| * increase FSF sequence counter - |
| * this must only be done for request successfully enqueued to |
| * QDIO this rejected requests may be cleaned up by calling |
| * routines resulting in missing sequence counter values |
| * otherwise, |
| */ |
| |
| /* Don't increase for unsolicited status */ |
| if (inc_seq_no) |
| adapter->fsf_req_seq_no++; |
| |
| /* count FSF requests pending */ |
| atomic_inc(&adapter->reqs_active); |
| } |
| return retval; |
| } |
| |
| #undef ZFCP_LOG_AREA |