| /* |
| * zfcp device driver |
| * |
| * Implementation of FSF commands. |
| * |
| * Copyright IBM Corporation 2002, 2010 |
| */ |
| |
| #define KMSG_COMPONENT "zfcp" |
| #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| |
| #include <linux/blktrace_api.h> |
| #include <scsi/fc/fc_els.h> |
| #include "zfcp_ext.h" |
| #include "zfcp_fc.h" |
| #include "zfcp_dbf.h" |
| #include "zfcp_reqlist.h" |
| |
| static void zfcp_fsf_request_timeout_handler(unsigned long data) |
| { |
| struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
| zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, |
| "fsrth_1", NULL); |
| } |
| |
| static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, |
| unsigned long timeout) |
| { |
| fsf_req->timer.function = zfcp_fsf_request_timeout_handler; |
| fsf_req->timer.data = (unsigned long) fsf_req->adapter; |
| fsf_req->timer.expires = jiffies + timeout; |
| add_timer(&fsf_req->timer); |
| } |
| |
| static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) |
| { |
| BUG_ON(!fsf_req->erp_action); |
| fsf_req->timer.function = zfcp_erp_timeout_handler; |
| fsf_req->timer.data = (unsigned long) fsf_req->erp_action; |
| fsf_req->timer.expires = jiffies + 30 * HZ; |
| add_timer(&fsf_req->timer); |
| } |
| |
| /* association between FSF command and FSF QTCB type */ |
| static u32 fsf_qtcb_type[] = { |
| [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 void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table) |
| { |
| u16 subtable = table >> 16; |
| u16 rule = table & 0xffff; |
| const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" }; |
| |
| if (subtable && subtable < ARRAY_SIZE(act_type)) |
| dev_warn(&adapter->ccw_device->dev, |
| "Access denied according to ACT rule type %s, " |
| "rule %d\n", act_type[subtable], rule); |
| } |
| |
| static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req, |
| struct zfcp_port *port) |
| { |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| dev_warn(&req->adapter->ccw_device->dev, |
| "Access denied to port 0x%016Lx\n", |
| (unsigned long long)port->wwpn); |
| zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); |
| zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); |
| zfcp_erp_port_access_denied(port, "fspad_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| |
| static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req, |
| struct zfcp_unit *unit) |
| { |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| dev_warn(&req->adapter->ccw_device->dev, |
| "Access denied to unit 0x%016Lx on port 0x%016Lx\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); |
| zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); |
| zfcp_erp_unit_access_denied(unit, "fsuad_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| |
| static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) |
| { |
| dev_err(&req->adapter->ccw_device->dev, "FCP device not " |
| "operational because of an unsupported FC class\n"); |
| zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| |
| /** |
| * zfcp_fsf_req_free - free memory used by fsf request |
| * @fsf_req: pointer to struct zfcp_fsf_req |
| */ |
| void zfcp_fsf_req_free(struct zfcp_fsf_req *req) |
| { |
| if (likely(req->pool)) { |
| if (likely(req->qtcb)) |
| mempool_free(req->qtcb, req->adapter->pool.qtcb_pool); |
| mempool_free(req, req->pool); |
| return; |
| } |
| |
| if (likely(req->qtcb)) |
| kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb); |
| kfree(req); |
| } |
| |
| static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) |
| { |
| unsigned long flags; |
| struct fsf_status_read_buffer *sr_buf = req->data; |
| struct zfcp_adapter *adapter = req->adapter; |
| struct zfcp_port *port; |
| int d_id = ntoh24(sr_buf->d_id); |
| |
| read_lock_irqsave(&adapter->port_list_lock, flags); |
| list_for_each_entry(port, &adapter->port_list, list) |
| if (port->d_id == d_id) { |
| zfcp_erp_port_reopen(port, 0, "fssrpc1", req); |
| break; |
| } |
| read_unlock_irqrestore(&adapter->port_list_lock, flags); |
| } |
| |
| static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id, |
| struct fsf_link_down_info *link_down) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| |
| if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) |
| return; |
| |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); |
| |
| zfcp_scsi_schedule_rports_block(adapter); |
| |
| if (!link_down) |
| goto out; |
| |
| switch (link_down->error_code) { |
| case FSF_PSQ_LINK_NO_LIGHT: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "There is no light signal from the local " |
| "fibre channel cable\n"); |
| break; |
| case FSF_PSQ_LINK_WRAP_PLUG: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "There is a wrap plug instead of a fibre " |
| "channel cable\n"); |
| break; |
| case FSF_PSQ_LINK_NO_FCP: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The adjacent fibre channel node does not " |
| "support FCP\n"); |
| break; |
| case FSF_PSQ_LINK_FIRMWARE_UPDATE: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The FCP device is suspended because of a " |
| "firmware update\n"); |
| break; |
| case FSF_PSQ_LINK_INVALID_WWPN: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The FCP device detected a WWPN that is " |
| "duplicate or not valid\n"); |
| break; |
| case FSF_PSQ_LINK_NO_NPIV_SUPPORT: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The fibre channel fabric does not support NPIV\n"); |
| break; |
| case FSF_PSQ_LINK_NO_FCP_RESOURCES: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The FCP adapter cannot support more NPIV ports\n"); |
| break; |
| case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The adjacent switch cannot support " |
| "more NPIV ports\n"); |
| break; |
| case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The FCP adapter could not log in to the " |
| "fibre channel fabric\n"); |
| break; |
| case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The WWPN assignment file on the FCP adapter " |
| "has been damaged\n"); |
| break; |
| case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The mode table on the FCP adapter " |
| "has been damaged\n"); |
| break; |
| case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "All NPIV ports on the FCP adapter have " |
| "been assigned\n"); |
| break; |
| default: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "The link between the FCP adapter and " |
| "the FC fabric is down\n"); |
| } |
| out: |
| zfcp_erp_adapter_failed(adapter, id, req); |
| } |
| |
| static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) |
| { |
| struct fsf_status_read_buffer *sr_buf = req->data; |
| struct fsf_link_down_info *ldi = |
| (struct fsf_link_down_info *) &sr_buf->payload; |
| |
| switch (sr_buf->status_subtype) { |
| case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: |
| zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi); |
| break; |
| case FSF_STATUS_READ_SUB_FDISC_FAILED: |
| zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi); |
| break; |
| case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: |
| zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL); |
| }; |
| } |
| |
| static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct fsf_status_read_buffer *sr_buf = req->data; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { |
| zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf); |
| mempool_free(sr_buf, adapter->pool.status_read_data); |
| zfcp_fsf_req_free(req); |
| return; |
| } |
| |
| zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf); |
| |
| switch (sr_buf->status_type) { |
| case FSF_STATUS_READ_PORT_CLOSED: |
| zfcp_fsf_status_read_port_closed(req); |
| break; |
| case FSF_STATUS_READ_INCOMING_ELS: |
| zfcp_fc_incoming_els(req); |
| break; |
| case FSF_STATUS_READ_SENSE_DATA_AVAIL: |
| break; |
| case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: |
| dev_warn(&adapter->ccw_device->dev, |
| "The error threshold for checksum statistics " |
| "has been exceeded\n"); |
| zfcp_dbf_hba_berr(adapter->dbf, req); |
| break; |
| case FSF_STATUS_READ_LINK_DOWN: |
| zfcp_fsf_status_read_link_down(req); |
| break; |
| case FSF_STATUS_READ_LINK_UP: |
| dev_info(&adapter->ccw_device->dev, |
| "The local link has been restored\n"); |
| /* All ports should be marked as ready to run again */ |
| zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL, |
| ZFCP_STATUS_COMMON_RUNNING, |
| ZFCP_SET); |
| zfcp_erp_adapter_reopen(adapter, |
| ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
| ZFCP_STATUS_COMMON_ERP_FAILED, |
| "fssrh_2", req); |
| break; |
| case FSF_STATUS_READ_NOTIFICATION_LOST: |
| if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED) |
| zfcp_erp_adapter_access_changed(adapter, "fssrh_3", |
| req); |
| if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) |
| queue_work(adapter->work_queue, &adapter->scan_work); |
| break; |
| case FSF_STATUS_READ_CFDC_UPDATED: |
| zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req); |
| break; |
| case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: |
| adapter->adapter_features = sr_buf->payload.word[0]; |
| break; |
| } |
| |
| mempool_free(sr_buf, adapter->pool.status_read_data); |
| zfcp_fsf_req_free(req); |
| |
| atomic_inc(&adapter->stat_miss); |
| queue_work(adapter->work_queue, &adapter->stat_work); |
| } |
| |
| static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) |
| { |
| switch (req->qtcb->header.fsf_status_qual.word[0]) { |
| case FSF_SQ_FCP_RSP_AVAILABLE: |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| case FSF_SQ_NO_RETRY_POSSIBLE: |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| return; |
| case FSF_SQ_COMMAND_ABORTED: |
| break; |
| case FSF_SQ_NO_RECOM: |
| dev_err(&req->adapter->ccw_device->dev, |
| "The FCP adapter reported a problem " |
| "that cannot be recovered\n"); |
| zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req); |
| break; |
| } |
| /* all non-return stats set FSFREQ_ERROR*/ |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| |
| static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) |
| { |
| if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) |
| return; |
| |
| switch (req->qtcb->header.fsf_status) { |
| case FSF_UNKNOWN_COMMAND: |
| dev_err(&req->adapter->ccw_device->dev, |
| "The FCP adapter does not recognize the command 0x%x\n", |
| req->qtcb->header.fsf_command); |
| zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| zfcp_fsf_fsfstatus_qual_eval(req); |
| break; |
| } |
| } |
| |
| static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct fsf_qtcb *qtcb = req->qtcb; |
| union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; |
| |
| zfcp_dbf_hba_fsf_response(req); |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| return; |
| } |
| |
| switch (qtcb->prefix.prot_status) { |
| case FSF_PROT_GOOD: |
| case FSF_PROT_FSF_STATUS_PRESENTED: |
| return; |
| case FSF_PROT_QTCB_VERSION_ERROR: |
| dev_err(&adapter->ccw_device->dev, |
| "QTCB version 0x%x not supported by FCP adapter " |
| "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION, |
| psq->word[0], psq->word[1]); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req); |
| break; |
| case FSF_PROT_ERROR_STATE: |
| case FSF_PROT_SEQ_NUMB_ERROR: |
| zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_PROT_UNSUPP_QTCB_TYPE: |
| dev_err(&adapter->ccw_device->dev, |
| "The QTCB type is not supported by the FCP adapter\n"); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req); |
| break; |
| case FSF_PROT_HOST_CONNECTION_INITIALIZING: |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
| &adapter->status); |
| break; |
| case FSF_PROT_DUPLICATE_REQUEST_ID: |
| dev_err(&adapter->ccw_device->dev, |
| "0x%Lx is an ambiguous request identifier\n", |
| (unsigned long long)qtcb->bottom.support.req_handle); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req); |
| break; |
| case FSF_PROT_LINK_DOWN: |
| zfcp_fsf_link_down_info_eval(req, "fspse_5", |
| &psq->link_down_info); |
| /* go through reopen to flush pending requests */ |
| zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req); |
| break; |
| case FSF_PROT_REEST_QUEUE: |
| /* All ports should be marked as ready to run again */ |
| zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL, |
| ZFCP_STATUS_COMMON_RUNNING, |
| ZFCP_SET); |
| zfcp_erp_adapter_reopen(adapter, |
| ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
| ZFCP_STATUS_COMMON_ERP_FAILED, |
| "fspse_8", req); |
| break; |
| default: |
| dev_err(&adapter->ccw_device->dev, |
| "0x%x is not a valid transfer protocol status\n", |
| qtcb->prefix.prot_status); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req); |
| } |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| |
| /** |
| * zfcp_fsf_req_complete - process completion of a FSF request |
| * @fsf_req: The FSF request that has been completed. |
| * |
| * When a request has been completed either from the FCP adapter, |
| * or it has been dismissed due to a queue shutdown, this function |
| * is called to process the completion status and trigger further |
| * events related to the FSF request. |
| */ |
| static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req) |
| { |
| if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { |
| zfcp_fsf_status_read_handler(req); |
| return; |
| } |
| |
| del_timer(&req->timer); |
| zfcp_fsf_protstatus_eval(req); |
| zfcp_fsf_fsfstatus_eval(req); |
| req->handler(req); |
| |
| if (req->erp_action) |
| zfcp_erp_notify(req->erp_action, 0); |
| |
| if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) |
| zfcp_fsf_req_free(req); |
| else |
| complete(&req->completion); |
| } |
| |
| /** |
| * zfcp_fsf_req_dismiss_all - dismiss all fsf requests |
| * @adapter: pointer to struct zfcp_adapter |
| * |
| * Never ever call this without shutting down the adapter first. |
| * Otherwise the adapter would continue using and corrupting s390 storage. |
| * Included BUG_ON() call to ensure this is done. |
| * 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 *req, *tmp; |
| LIST_HEAD(remove_queue); |
| |
| BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP); |
| zfcp_reqlist_move(adapter->req_list, &remove_queue); |
| |
| list_for_each_entry_safe(req, tmp, &remove_queue, list) { |
| list_del(&req->list); |
| req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
| zfcp_fsf_req_complete(req); |
| } |
| } |
| |
| static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) |
| { |
| struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config; |
| struct zfcp_adapter *adapter = req->adapter; |
| struct Scsi_Host *shost = adapter->scsi_host; |
| struct fc_els_flogi *nsp, *plogi; |
| |
| /* adjust pointers for missing command code */ |
| nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param |
| - sizeof(u32)); |
| plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload |
| - sizeof(u32)); |
| |
| if (req->data) |
| memcpy(req->data, bottom, sizeof(*bottom)); |
| |
| fc_host_port_name(shost) = nsp->fl_wwpn; |
| fc_host_node_name(shost) = nsp->fl_wwnn; |
| fc_host_port_id(shost) = ntoh24(bottom->s_id); |
| 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; |
| adapter->timer_ticks = bottom->timer_interval; |
| |
| if (fc_host_permanent_port_name(shost) == -1) |
| fc_host_permanent_port_name(shost) = fc_host_port_name(shost); |
| |
| switch (bottom->fc_topology) { |
| case FSF_TOPO_P2P: |
| adapter->peer_d_id = ntoh24(bottom->peer_d_id); |
| adapter->peer_wwpn = plogi->fl_wwpn; |
| adapter->peer_wwnn = plogi->fl_wwnn; |
| fc_host_port_type(shost) = FC_PORTTYPE_PTP; |
| break; |
| case FSF_TOPO_FABRIC: |
| fc_host_port_type(shost) = FC_PORTTYPE_NPORT; |
| break; |
| case FSF_TOPO_AL: |
| fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; |
| /* fall through */ |
| default: |
| dev_err(&adapter->ccw_device->dev, |
| "Unknown or unsupported arbitrated loop " |
| "fibre channel topology detected\n"); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct fsf_qtcb *qtcb = req->qtcb; |
| struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config; |
| struct Scsi_Host *shost = adapter->scsi_host; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| 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; |
| |
| switch (qtcb->header.fsf_status) { |
| case FSF_GOOD: |
| if (zfcp_fsf_exchange_config_evaluate(req)) |
| return; |
| |
| if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { |
| dev_err(&adapter->ccw_device->dev, |
| "FCP adapter maximum QTCB size (%d bytes) " |
| "is too small\n", |
| bottom->max_qtcb_size); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req); |
| return; |
| } |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
| &adapter->status); |
| break; |
| case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: |
| fc_host_node_name(shost) = 0; |
| fc_host_port_name(shost) = 0; |
| fc_host_port_id(shost) = 0; |
| fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; |
| adapter->hydra_version = 0; |
| |
| atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
| &adapter->status); |
| |
| zfcp_fsf_link_down_info_eval(req, "fsecdh2", |
| &qtcb->header.fsf_status_qual.link_down_info); |
| break; |
| default: |
| zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req); |
| return; |
| } |
| |
| if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { |
| adapter->hardware_version = bottom->hardware_version; |
| memcpy(fc_host_serial_number(shost), bottom->serial_number, |
| min(FC_SERIAL_NUMBER_SIZE, 17)); |
| EBCASC(fc_host_serial_number(shost), |
| min(FC_SERIAL_NUMBER_SIZE, 17)); |
| } |
| |
| if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) { |
| dev_err(&adapter->ccw_device->dev, |
| "The FCP adapter only supports newer " |
| "control block versions\n"); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req); |
| return; |
| } |
| if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) { |
| dev_err(&adapter->ccw_device->dev, |
| "The FCP adapter only supports older " |
| "control block versions\n"); |
| zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req); |
| } |
| } |
| |
| static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port; |
| struct Scsi_Host *shost = adapter->scsi_host; |
| |
| if (req->data) |
| memcpy(req->data, bottom, sizeof(*bottom)); |
| |
| if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) { |
| fc_host_permanent_port_name(shost) = bottom->wwpn; |
| fc_host_port_type(shost) = FC_PORTTYPE_NPIV; |
| } 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; |
| memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types, |
| FC_FC4_LIST_SIZE); |
| memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types, |
| FC_FC4_LIST_SIZE); |
| } |
| |
| static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) |
| { |
| struct fsf_qtcb *qtcb = req->qtcb; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| switch (qtcb->header.fsf_status) { |
| case FSF_GOOD: |
| zfcp_fsf_exchange_port_evaluate(req); |
| break; |
| case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: |
| zfcp_fsf_exchange_port_evaluate(req); |
| zfcp_fsf_link_down_info_eval(req, "fsepdh1", |
| &qtcb->header.fsf_status_qual.link_down_info); |
| break; |
| } |
| } |
| |
| static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio) |
| { |
| struct zfcp_qdio_queue *req_q = &qdio->req_q; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (atomic_read(&req_q->count)) |
| return 1; |
| spin_unlock_bh(&qdio->req_q_lock); |
| return 0; |
| } |
| |
| static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio) |
| { |
| struct zfcp_adapter *adapter = qdio->adapter; |
| long ret; |
| |
| spin_unlock_bh(&qdio->req_q_lock); |
| ret = wait_event_interruptible_timeout(qdio->req_q_wq, |
| zfcp_fsf_sbal_check(qdio), 5 * HZ); |
| if (ret > 0) |
| return 0; |
| if (!ret) { |
| atomic_inc(&qdio->req_q_full); |
| /* assume hanging outbound queue, try queue recovery */ |
| zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL); |
| } |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| return -EIO; |
| } |
| |
| static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool) |
| { |
| struct zfcp_fsf_req *req; |
| |
| if (likely(pool)) |
| req = mempool_alloc(pool, GFP_ATOMIC); |
| else |
| req = kmalloc(sizeof(*req), GFP_ATOMIC); |
| |
| if (unlikely(!req)) |
| return NULL; |
| |
| memset(req, 0, sizeof(*req)); |
| req->pool = pool; |
| return req; |
| } |
| |
| static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool) |
| { |
| struct fsf_qtcb *qtcb; |
| |
| if (likely(pool)) |
| qtcb = mempool_alloc(pool, GFP_ATOMIC); |
| else |
| qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC); |
| |
| if (unlikely(!qtcb)) |
| return NULL; |
| |
| memset(qtcb, 0, sizeof(*qtcb)); |
| return qtcb; |
| } |
| |
| static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, |
| u32 fsf_cmd, mempool_t *pool) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio_queue *req_q = &qdio->req_q; |
| struct zfcp_adapter *adapter = qdio->adapter; |
| struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool); |
| |
| if (unlikely(!req)) |
| return ERR_PTR(-ENOMEM); |
| |
| if (adapter->req_no == 0) |
| adapter->req_no++; |
| |
| INIT_LIST_HEAD(&req->list); |
| init_timer(&req->timer); |
| init_completion(&req->completion); |
| |
| req->adapter = adapter; |
| req->fsf_command = fsf_cmd; |
| req->req_id = adapter->req_no; |
| req->queue_req.sbal_number = 1; |
| req->queue_req.sbal_first = req_q->first; |
| req->queue_req.sbal_last = req_q->first; |
| req->queue_req.sbale_curr = 1; |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].addr = (void *) req->req_id; |
| sbale[0].flags |= SBAL_FLAGS0_COMMAND; |
| |
| if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) { |
| if (likely(pool)) |
| req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool); |
| else |
| req->qtcb = zfcp_qtcb_alloc(NULL); |
| |
| if (unlikely(!req->qtcb)) { |
| zfcp_fsf_req_free(req); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| req->seq_no = adapter->fsf_req_seq_no; |
| req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; |
| req->qtcb->prefix.req_id = req->req_id; |
| req->qtcb->prefix.ulp_info = 26; |
| req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command]; |
| req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; |
| req->qtcb->header.req_handle = req->req_id; |
| req->qtcb->header.fsf_command = req->fsf_command; |
| sbale[1].addr = (void *) req->qtcb; |
| sbale[1].length = sizeof(struct fsf_qtcb); |
| } |
| |
| if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) { |
| zfcp_fsf_req_free(req); |
| return ERR_PTR(-EIO); |
| } |
| |
| return req; |
| } |
| |
| static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct zfcp_qdio *qdio = adapter->qdio; |
| int with_qtcb = (req->qtcb != NULL); |
| int req_id = req->req_id; |
| |
| zfcp_reqlist_add(adapter->req_list, req); |
| |
| req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count); |
| req->issued = get_clock(); |
| if (zfcp_qdio_send(qdio, &req->queue_req)) { |
| del_timer(&req->timer); |
| /* lookup request again, list might have changed */ |
| zfcp_reqlist_find_rm(adapter->req_list, req_id); |
| zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req); |
| return -EIO; |
| } |
| |
| /* Don't increase for unsolicited status */ |
| if (with_qtcb) |
| adapter->fsf_req_seq_no++; |
| adapter->req_no++; |
| |
| return 0; |
| } |
| |
| /** |
| * zfcp_fsf_status_read - send status read request |
| * @adapter: pointer to struct zfcp_adapter |
| * @req_flags: request flags |
| * Returns: 0 on success, ERROR otherwise |
| */ |
| int zfcp_fsf_status_read(struct zfcp_qdio *qdio) |
| { |
| struct zfcp_adapter *adapter = qdio->adapter; |
| struct zfcp_fsf_req *req; |
| struct fsf_status_read_buffer *sr_buf; |
| struct qdio_buffer_element *sbale; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, |
| adapter->pool.status_read_req); |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; |
| req->queue_req.sbale_curr = 2; |
| |
| sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC); |
| if (!sr_buf) { |
| retval = -ENOMEM; |
| goto failed_buf; |
| } |
| memset(sr_buf, 0, sizeof(*sr_buf)); |
| req->data = sr_buf; |
| sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req); |
| sbale->addr = (void *) sr_buf; |
| sbale->length = sizeof(*sr_buf); |
| |
| retval = zfcp_fsf_req_send(req); |
| if (retval) |
| goto failed_req_send; |
| |
| goto out; |
| |
| failed_req_send: |
| mempool_free(sr_buf, adapter->pool.status_read_data); |
| failed_buf: |
| zfcp_fsf_req_free(req); |
| zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL); |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_unit *unit = req->data; |
| union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| switch (req->qtcb->header.fsf_status) { |
| case FSF_PORT_HANDLE_NOT_VALID: |
| if (fsq->word[0] == fsq->word[1]) { |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, |
| "fsafch1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| break; |
| case FSF_LUN_HANDLE_NOT_VALID: |
| if (fsq->word[0] == fsq->word[1]) { |
| zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| } |
| break; |
| case FSF_FCP_COMMAND_DOES_NOT_EXIST: |
| req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; |
| break; |
| case FSF_PORT_BOXED: |
| zfcp_erp_port_boxed(unit->port, "fsafch3", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_LUN_BOXED: |
| zfcp_erp_unit_boxed(unit, "fsafch4", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (fsq->word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| zfcp_fc_test_link(unit->port); |
| /* fall through */ |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| case FSF_GOOD: |
| req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; |
| break; |
| } |
| } |
| |
| /** |
| * zfcp_fsf_abort_fcp_command - abort running SCSI command |
| * @old_req_id: unsigned long |
| * @unit: pointer to struct zfcp_unit |
| * Returns: pointer to struct zfcp_fsf_req |
| */ |
| |
| struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, |
| struct zfcp_unit *unit) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *req = NULL; |
| struct zfcp_qdio *qdio = unit->port->adapter->qdio; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND, |
| qdio->adapter->pool.scsi_abort); |
| if (IS_ERR(req)) { |
| req = NULL; |
| goto out; |
| } |
| |
| if (unlikely(!(atomic_read(&unit->status) & |
| ZFCP_STATUS_COMMON_UNBLOCKED))) |
| goto out_error_free; |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->data = unit; |
| req->handler = zfcp_fsf_abort_fcp_command_handler; |
| req->qtcb->header.lun_handle = unit->handle; |
| req->qtcb->header.port_handle = unit->port->handle; |
| req->qtcb->bottom.support.req_handle = (u64) old_req_id; |
| |
| zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); |
| if (!zfcp_fsf_req_send(req)) |
| goto out; |
| |
| out_error_free: |
| zfcp_fsf_req_free(req); |
| req = NULL; |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return req; |
| } |
| |
| static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct zfcp_fsf_ct_els *ct = req->data; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| |
| ct->status = -EINVAL; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| goto skip_fsfstatus; |
| |
| switch (header->fsf_status) { |
| case FSF_GOOD: |
| zfcp_dbf_san_ct_response(req); |
| ct->status = 0; |
| break; |
| case FSF_SERVICE_CLASS_NOT_SUPPORTED: |
| zfcp_fsf_class_not_supp(req); |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]){ |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| case FSF_ACCESS_DENIED: |
| break; |
| case FSF_PORT_BOXED: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_PORT_HANDLE_NOT_VALID: |
| zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req); |
| /* fall through */ |
| case FSF_GENERIC_COMMAND_REJECTED: |
| case FSF_PAYLOAD_SIZE_MISMATCH: |
| case FSF_REQUEST_SIZE_TOO_LARGE: |
| case FSF_RESPONSE_SIZE_TOO_LARGE: |
| case FSF_SBAL_MISMATCH: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| |
| skip_fsfstatus: |
| if (ct->handler) |
| ct->handler(ct->handler_data); |
| } |
| |
| static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale, |
| struct scatterlist *sg_req, |
| struct scatterlist *sg_resp) |
| { |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; |
| sbale[2].addr = sg_virt(sg_req); |
| sbale[2].length = sg_req->length; |
| sbale[3].addr = sg_virt(sg_resp); |
| sbale[3].length = sg_resp->length; |
| sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; |
| } |
| |
| static int zfcp_fsf_one_sbal(struct scatterlist *sg) |
| { |
| return sg_is_last(sg) && sg->length <= PAGE_SIZE; |
| } |
| |
| static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, |
| struct scatterlist *sg_req, |
| struct scatterlist *sg_resp, |
| int max_sbals) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio, |
| &req->queue_req); |
| u32 feat = adapter->adapter_features; |
| int bytes; |
| |
| if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) { |
| if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp)) |
| return -EOPNOTSUPP; |
| |
| zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp); |
| return 0; |
| } |
| |
| /* use single, unchained SBAL if it can hold the request */ |
| if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) { |
| zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp); |
| return 0; |
| } |
| |
| bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req, |
| SBAL_FLAGS0_TYPE_WRITE_READ, |
| sg_req, max_sbals); |
| if (bytes <= 0) |
| return -EIO; |
| req->qtcb->bottom.support.req_buf_length = bytes; |
| req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; |
| |
| bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req, |
| SBAL_FLAGS0_TYPE_WRITE_READ, |
| sg_resp, max_sbals); |
| req->qtcb->bottom.support.resp_buf_length = bytes; |
| if (bytes <= 0) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req, |
| struct scatterlist *sg_req, |
| struct scatterlist *sg_resp, |
| int max_sbals, unsigned int timeout) |
| { |
| int ret; |
| |
| ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals); |
| if (ret) |
| return ret; |
| |
| /* common settings for ct/gs and els requests */ |
| if (timeout > 255) |
| timeout = 255; /* max value accepted by hardware */ |
| req->qtcb->bottom.support.service_class = FSF_CLASS_3; |
| req->qtcb->bottom.support.timeout = timeout; |
| zfcp_fsf_start_timer(req, (timeout + 10) * HZ); |
| |
| return 0; |
| } |
| |
| /** |
| * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) |
| * @ct: pointer to struct zfcp_send_ct with data for request |
| * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req |
| */ |
| int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port, |
| struct zfcp_fsf_ct_els *ct, mempool_t *pool, |
| unsigned int timeout) |
| { |
| struct zfcp_qdio *qdio = wka_port->adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int ret = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool); |
| |
| if (IS_ERR(req)) { |
| ret = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, |
| FSF_MAX_SBALS_PER_REQ, timeout); |
| if (ret) |
| goto failed_send; |
| |
| req->handler = zfcp_fsf_send_ct_handler; |
| req->qtcb->header.port_handle = wka_port->handle; |
| req->data = ct; |
| |
| zfcp_dbf_san_ct_request(req, wka_port->d_id); |
| |
| ret = zfcp_fsf_req_send(req); |
| if (ret) |
| goto failed_send; |
| |
| goto out; |
| |
| failed_send: |
| zfcp_fsf_req_free(req); |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return ret; |
| } |
| |
| static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_fsf_ct_els *send_els = req->data; |
| struct zfcp_port *port = send_els->port; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| |
| send_els->status = -EINVAL; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| goto skip_fsfstatus; |
| |
| switch (header->fsf_status) { |
| case FSF_GOOD: |
| zfcp_dbf_san_els_response(req); |
| send_els->status = 0; |
| break; |
| case FSF_SERVICE_CLASS_NOT_SUPPORTED: |
| zfcp_fsf_class_not_supp(req); |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]){ |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| case FSF_SQ_RETRY_IF_POSSIBLE: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| case FSF_ELS_COMMAND_REJECTED: |
| case FSF_PAYLOAD_SIZE_MISMATCH: |
| case FSF_REQUEST_SIZE_TOO_LARGE: |
| case FSF_RESPONSE_SIZE_TOO_LARGE: |
| break; |
| case FSF_ACCESS_DENIED: |
| if (port) |
| zfcp_fsf_access_denied_port(req, port); |
| break; |
| case FSF_SBAL_MISMATCH: |
| /* should never occure, avoided in zfcp_fsf_send_els */ |
| /* fall through */ |
| default: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| skip_fsfstatus: |
| if (send_els->handler) |
| send_els->handler(send_els->handler_data); |
| } |
| |
| /** |
| * zfcp_fsf_send_els - initiate an ELS command (FC-FS) |
| * @els: pointer to struct zfcp_send_els with data for the command |
| */ |
| int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id, |
| struct zfcp_fsf_ct_els *els, unsigned int timeout) |
| { |
| struct zfcp_fsf_req *req; |
| struct zfcp_qdio *qdio = adapter->qdio; |
| int ret = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL); |
| |
| if (IS_ERR(req)) { |
| ret = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2, timeout); |
| |
| if (ret) |
| goto failed_send; |
| |
| hton24(req->qtcb->bottom.support.d_id, d_id); |
| req->handler = zfcp_fsf_send_els_handler; |
| req->data = els; |
| |
| zfcp_dbf_san_els_request(req); |
| |
| ret = zfcp_fsf_req_send(req); |
| if (ret) |
| goto failed_send; |
| |
| goto out; |
| |
| failed_send: |
| zfcp_fsf_req_free(req); |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return ret; |
| } |
| |
| int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *req; |
| struct zfcp_qdio *qdio = erp_action->adapter->qdio; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, |
| qdio->adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->qtcb->bottom.config.feature_selection = |
| FSF_FEATURE_CFDC | |
| FSF_FEATURE_LUN_SHARING | |
| FSF_FEATURE_NOTIFICATION_LOST | |
| FSF_FEATURE_UPDATE_ALERT; |
| req->erp_action = erp_action; |
| req->handler = zfcp_fsf_exchange_config_data_handler; |
| erp_action->fsf_req_id = req->req_id; |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio, |
| struct fsf_qtcb_bottom_config *data) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *req = NULL; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out_unlock; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out_unlock; |
| } |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| req->handler = zfcp_fsf_exchange_config_data_handler; |
| |
| req->qtcb->bottom.config.feature_selection = |
| FSF_FEATURE_CFDC | |
| FSF_FEATURE_LUN_SHARING | |
| FSF_FEATURE_NOTIFICATION_LOST | |
| FSF_FEATURE_UPDATE_ALERT; |
| |
| if (data) |
| req->data = data; |
| |
| zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(req); |
| spin_unlock_bh(&qdio->req_q_lock); |
| if (!retval) |
| wait_for_completion(&req->completion); |
| |
| zfcp_fsf_req_free(req); |
| return retval; |
| |
| out_unlock: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| /** |
| * zfcp_fsf_exchange_port_data - request information about local port |
| * @erp_action: ERP action for the adapter for which port data is requested |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) |
| { |
| struct zfcp_qdio *qdio = erp_action->adapter->qdio; |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) |
| return -EOPNOTSUPP; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, |
| qdio->adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->handler = zfcp_fsf_exchange_port_data_handler; |
| req->erp_action = erp_action; |
| erp_action->fsf_req_id = req->req_id; |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| /** |
| * zfcp_fsf_exchange_port_data_sync - request information about local port |
| * @qdio: pointer to struct zfcp_qdio |
| * @data: pointer to struct fsf_qtcb_bottom_port |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, |
| struct fsf_qtcb_bottom_port *data) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *req = NULL; |
| int retval = -EIO; |
| |
| if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) |
| return -EOPNOTSUPP; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out_unlock; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out_unlock; |
| } |
| |
| if (data) |
| req->data = data; |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->handler = zfcp_fsf_exchange_port_data_handler; |
| zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(req); |
| spin_unlock_bh(&qdio->req_q_lock); |
| |
| if (!retval) |
| wait_for_completion(&req->completion); |
| |
| zfcp_fsf_req_free(req); |
| |
| return retval; |
| |
| out_unlock: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_port *port = req->data; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| struct fc_els_flogi *plogi; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| goto out; |
| |
| switch (header->fsf_status) { |
| case FSF_PORT_ALREADY_OPEN: |
| break; |
| case FSF_ACCESS_DENIED: |
| zfcp_fsf_access_denied_port(req, port); |
| break; |
| case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "Not enough FCP adapter resources to open " |
| "remote port 0x%016Lx\n", |
| (unsigned long long)port->wwpn); |
| zfcp_erp_port_failed(port, "fsoph_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| case FSF_SQ_NO_RETRY_POSSIBLE: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| case FSF_GOOD: |
| port->handle = header->port_handle; |
| 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); |
| /* 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 fc_els_flogi *) req->qtcb->bottom.support.els; |
| if (req->qtcb->bottom.support.els1_length >= |
| FSF_PLOGI_MIN_LEN) |
| zfcp_fc_plogi_evaluate(port, plogi); |
| break; |
| case FSF_UNKNOWN_OP_SUBTYPE: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| |
| out: |
| put_device(&port->dev); |
| } |
| |
| /** |
| * zfcp_fsf_open_port - create and send open port request |
| * @erp_action: pointer to struct zfcp_erp_action |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = erp_action->adapter->qdio; |
| struct zfcp_port *port = erp_action->port; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, |
| qdio->adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->handler = zfcp_fsf_open_port_handler; |
| hton24(req->qtcb->bottom.support.d_id, port->d_id); |
| req->data = port; |
| req->erp_action = erp_action; |
| erp_action->fsf_req_id = req->req_id; |
| get_device(&port->dev); |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| put_device(&port->dev); |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_port *port = req->data; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| switch (req->qtcb->header.fsf_status) { |
| case FSF_PORT_HANDLE_NOT_VALID: |
| zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| break; |
| case FSF_GOOD: |
| zfcp_erp_modify_port_status(port, "fscph_2", req, |
| ZFCP_STATUS_COMMON_OPEN, |
| ZFCP_CLEAR); |
| break; |
| } |
| } |
| |
| /** |
| * zfcp_fsf_close_port - create and send close port request |
| * @erp_action: pointer to struct zfcp_erp_action |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = erp_action->adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, |
| qdio->adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->handler = zfcp_fsf_close_port_handler; |
| req->data = erp_action->port; |
| req->erp_action = erp_action; |
| req->qtcb->header.port_handle = erp_action->port->handle; |
| erp_action->fsf_req_id = req->req_id; |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_fc_wka_port *wka_port = req->data; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) { |
| wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
| goto out; |
| } |
| |
| switch (header->fsf_status) { |
| case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: |
| dev_warn(&req->adapter->ccw_device->dev, |
| "Opening WKA port 0x%x failed\n", wka_port->d_id); |
| /* fall through */ |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| /* fall through */ |
| case FSF_ACCESS_DENIED: |
| wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
| break; |
| case FSF_GOOD: |
| wka_port->handle = header->port_handle; |
| /* fall through */ |
| case FSF_PORT_ALREADY_OPEN: |
| wka_port->status = ZFCP_FC_WKA_PORT_ONLINE; |
| } |
| out: |
| wake_up(&wka_port->completion_wq); |
| } |
| |
| /** |
| * zfcp_fsf_open_wka_port - create and send open wka-port request |
| * @wka_port: pointer to struct zfcp_fc_wka_port |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = wka_port->adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, |
| qdio->adapter->pool.erp_req); |
| |
| if (unlikely(IS_ERR(req))) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->handler = zfcp_fsf_open_wka_port_handler; |
| hton24(req->qtcb->bottom.support.d_id, wka_port->d_id); |
| req->data = wka_port; |
| |
| zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) |
| zfcp_fsf_req_free(req); |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_fc_wka_port *wka_port = req->data; |
| |
| if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) { |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req); |
| } |
| |
| wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
| wake_up(&wka_port->completion_wq); |
| } |
| |
| /** |
| * zfcp_fsf_close_wka_port - create and send close wka port request |
| * @wka_port: WKA port to open |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = wka_port->adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, |
| qdio->adapter->pool.erp_req); |
| |
| if (unlikely(IS_ERR(req))) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->handler = zfcp_fsf_close_wka_port_handler; |
| req->data = wka_port; |
| req->qtcb->header.port_handle = wka_port->handle; |
| |
| zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) |
| zfcp_fsf_req_free(req); |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_port *port = req->data; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| struct zfcp_unit *unit; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| switch (header->fsf_status) { |
| case FSF_PORT_HANDLE_NOT_VALID: |
| zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ACCESS_DENIED: |
| zfcp_fsf_access_denied_port(req, port); |
| break; |
| case FSF_PORT_BOXED: |
| /* 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); |
| read_lock(&port->unit_list_lock); |
| list_for_each_entry(unit, &port->unit_list, list) |
| atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, |
| &unit->status); |
| read_unlock(&port->unit_list_lock); |
| zfcp_erp_port_boxed(port, "fscpph2", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| /* fall through */ |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| case FSF_GOOD: |
| /* 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); |
| read_lock(&port->unit_list_lock); |
| list_for_each_entry(unit, &port->unit_list, list) |
| atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, |
| &unit->status); |
| read_unlock(&port->unit_list_lock); |
| break; |
| } |
| } |
| |
| /** |
| * zfcp_fsf_close_physical_port - close physical port |
| * @erp_action: pointer to struct zfcp_erp_action |
| * Returns: 0 on success |
| */ |
| int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = erp_action->adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT, |
| qdio->adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->data = erp_action->port; |
| req->qtcb->header.port_handle = erp_action->port->handle; |
| req->erp_action = erp_action; |
| req->handler = zfcp_fsf_close_physical_port_handler; |
| erp_action->fsf_req_id = req->req_id; |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = req->adapter; |
| struct zfcp_unit *unit = req->data; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support; |
| struct fsf_queue_designator *queue_designator = |
| &header->fsf_status_qual.fsf_queue_designator; |
| int exclusive, readwrite; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | |
| ZFCP_STATUS_COMMON_ACCESS_BOXED | |
| ZFCP_STATUS_UNIT_SHARED | |
| ZFCP_STATUS_UNIT_READONLY, |
| &unit->status); |
| |
| switch (header->fsf_status) { |
| |
| case FSF_PORT_HANDLE_NOT_VALID: |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req); |
| /* fall through */ |
| case FSF_LUN_ALREADY_OPEN: |
| break; |
| case FSF_ACCESS_DENIED: |
| zfcp_fsf_access_denied_unit(req, unit); |
| atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); |
| atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); |
| break; |
| case FSF_PORT_BOXED: |
| zfcp_erp_port_boxed(unit->port, "fsouh_2", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_LUN_SHARING_VIOLATION: |
| if (header->fsf_status_qual.word[0]) |
| dev_warn(&adapter->ccw_device->dev, |
| "LUN 0x%Lx on port 0x%Lx is already in " |
| "use by CSS%d, MIF Image ID %x\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn, |
| queue_designator->cssid, |
| queue_designator->hla); |
| else |
| zfcp_act_eval_err(adapter, |
| header->fsf_status_qual.word[2]); |
| zfcp_erp_unit_access_denied(unit, "fsouh_3", req); |
| atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); |
| atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: |
| dev_warn(&adapter->ccw_device->dev, |
| "No handle is available for LUN " |
| "0x%016Lx on port 0x%016Lx\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_erp_unit_failed(unit, "fsouh_4", req); |
| /* fall through */ |
| case FSF_INVALID_COMMAND_OPTION: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (header->fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| zfcp_fc_test_link(unit->port); |
| /* fall through */ |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| |
| case FSF_GOOD: |
| unit->handle = header->lun_handle; |
| atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); |
| |
| if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && |
| (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && |
| !zfcp_ccw_priv_sch(adapter)) { |
| 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); |
| dev_info(&adapter->ccw_device->dev, |
| "SCSI device at LUN 0x%016Lx on port " |
| "0x%016Lx opened read-only\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| } |
| |
| if (exclusive && !readwrite) { |
| dev_err(&adapter->ccw_device->dev, |
| "Exclusive read-only access not " |
| "supported (unit 0x%016Lx, " |
| "port 0x%016Lx)\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_erp_unit_failed(unit, "fsouh_5", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req); |
| } else if (!exclusive && readwrite) { |
| dev_err(&adapter->ccw_device->dev, |
| "Shared read-write access not " |
| "supported (unit 0x%016Lx, port " |
| "0x%016Lx)\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_erp_unit_failed(unit, "fsouh_7", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req); |
| } |
| } |
| break; |
| } |
| } |
| |
| /** |
| * zfcp_fsf_open_unit - open unit |
| * @erp_action: pointer to struct zfcp_erp_action |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_adapter *adapter = erp_action->adapter; |
| struct zfcp_qdio *qdio = adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN, |
| adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->qtcb->header.port_handle = erp_action->port->handle; |
| req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; |
| req->handler = zfcp_fsf_open_unit_handler; |
| req->data = erp_action->unit; |
| req->erp_action = erp_action; |
| erp_action->fsf_req_id = req->req_id; |
| |
| if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) |
| req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_unit *unit = req->data; |
| |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| return; |
| |
| switch (req->qtcb->header.fsf_status) { |
| case FSF_PORT_HANDLE_NOT_VALID: |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_LUN_HANDLE_NOT_VALID: |
| zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_PORT_BOXED: |
| zfcp_erp_port_boxed(unit->port, "fscuh_3", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| switch (req->qtcb->header.fsf_status_qual.word[0]) { |
| case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: |
| zfcp_fc_test_link(unit->port); |
| /* fall through */ |
| case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| break; |
| case FSF_GOOD: |
| atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); |
| break; |
| } |
| } |
| |
| /** |
| * zfcp_fsf_close_unit - close zfcp unit |
| * @erp_action: pointer to struct zfcp_unit |
| * Returns: 0 on success, error otherwise |
| */ |
| int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = erp_action->adapter->qdio; |
| struct zfcp_fsf_req *req; |
| int retval = -EIO; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN, |
| qdio->adapter->pool.erp_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| req->qtcb->header.port_handle = erp_action->port->handle; |
| req->qtcb->header.lun_handle = erp_action->unit->handle; |
| req->handler = zfcp_fsf_close_unit_handler; |
| req->data = erp_action->unit; |
| req->erp_action = erp_action; |
| erp_action->fsf_req_id = req->req_id; |
| |
| zfcp_fsf_start_erp_timer(req); |
| retval = zfcp_fsf_req_send(req); |
| if (retval) { |
| zfcp_fsf_req_free(req); |
| erp_action->fsf_req_id = 0; |
| } |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat) |
| { |
| lat_rec->sum += lat; |
| lat_rec->min = min(lat_rec->min, lat); |
| lat_rec->max = max(lat_rec->max, lat); |
| } |
| |
| static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi) |
| { |
| struct fsf_qual_latency_info *lat_in; |
| struct latency_cont *lat = NULL; |
| struct zfcp_unit *unit = req->unit; |
| struct zfcp_blk_drv_data blktrc; |
| int ticks = req->adapter->timer_ticks; |
| |
| lat_in = &req->qtcb->prefix.prot_status_qual.latency_info; |
| |
| blktrc.flags = 0; |
| blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC; |
| if (req->status & ZFCP_STATUS_FSFREQ_ERROR) |
| blktrc.flags |= ZFCP_BLK_REQ_ERROR; |
| blktrc.inb_usage = req->queue_req.qdio_inb_usage; |
| blktrc.outb_usage = req->queue_req.qdio_outb_usage; |
| |
| if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) { |
| blktrc.flags |= ZFCP_BLK_LAT_VALID; |
| blktrc.channel_lat = lat_in->channel_lat * ticks; |
| blktrc.fabric_lat = lat_in->fabric_lat * ticks; |
| |
| switch (req->qtcb->bottom.io.data_direction) { |
| case FSF_DATADIR_READ: |
| lat = &unit->latencies.read; |
| break; |
| case FSF_DATADIR_WRITE: |
| lat = &unit->latencies.write; |
| break; |
| case FSF_DATADIR_CMND: |
| lat = &unit->latencies.cmd; |
| break; |
| } |
| |
| if (lat) { |
| spin_lock(&unit->latencies.lock); |
| zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat); |
| zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat); |
| lat->counter++; |
| spin_unlock(&unit->latencies.lock); |
| } |
| } |
| |
| blk_add_driver_data(scsi->request->q, scsi->request, &blktrc, |
| sizeof(blktrc)); |
| } |
| |
| static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req) |
| { |
| struct scsi_cmnd *scpnt; |
| struct fcp_resp_with_ext *fcp_rsp; |
| unsigned long flags; |
| |
| read_lock_irqsave(&req->adapter->abort_lock, flags); |
| |
| scpnt = req->data; |
| if (unlikely(!scpnt)) { |
| read_unlock_irqrestore(&req->adapter->abort_lock, flags); |
| return; |
| } |
| |
| if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { |
| set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED); |
| goto skip_fsfstatus; |
| } |
| |
| fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp; |
| zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt); |
| |
| zfcp_fsf_req_trace(req, scpnt); |
| |
| skip_fsfstatus: |
| zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req); |
| |
| scpnt->host_scribble = NULL; |
| (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! |
| */ |
| read_unlock_irqrestore(&req->adapter->abort_lock, flags); |
| } |
| |
| static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req) |
| { |
| struct fcp_resp_with_ext *fcp_rsp; |
| struct fcp_resp_rsp_info *rsp_info; |
| |
| fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp; |
| rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; |
| |
| if ((rsp_info->rsp_code != FCP_TMF_CMPL) || |
| (req->status & ZFCP_STATUS_FSFREQ_ERROR)) |
| req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; |
| } |
| |
| |
| static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req) |
| { |
| struct zfcp_unit *unit; |
| struct fsf_qtcb_header *header = &req->qtcb->header; |
| |
| if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) |
| unit = req->data; |
| else |
| unit = req->unit; |
| |
| if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) |
| goto skip_fsfstatus; |
| |
| switch (header->fsf_status) { |
| case FSF_HANDLE_MISMATCH: |
| case FSF_PORT_HANDLE_NOT_VALID: |
| zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_FCPLUN_NOT_VALID: |
| case FSF_LUN_HANDLE_NOT_VALID: |
| zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_SERVICE_CLASS_NOT_SUPPORTED: |
| zfcp_fsf_class_not_supp(req); |
| break; |
| case FSF_ACCESS_DENIED: |
| zfcp_fsf_access_denied_unit(req, unit); |
| break; |
| case FSF_DIRECTION_INDICATOR_NOT_VALID: |
| dev_err(&req->adapter->ccw_device->dev, |
| "Incorrect direction %d, unit 0x%016Lx on port " |
| "0x%016Lx closed\n", |
| req->qtcb->bottom.io.data_direction, |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3", |
| req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_CMND_LENGTH_NOT_VALID: |
| dev_err(&req->adapter->ccw_device->dev, |
| "Incorrect CDB length %d, unit 0x%016Lx on " |
| "port 0x%016Lx closed\n", |
| req->qtcb->bottom.io.fcp_cmnd_length, |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4", |
| req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_PORT_BOXED: |
| zfcp_erp_port_boxed(unit->port, "fssfch5", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_LUN_BOXED: |
| zfcp_erp_unit_boxed(unit, "fssfch6", req); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| case FSF_ADAPTER_STATUS_AVAILABLE: |
| if (header->fsf_status_qual.word[0] == |
| FSF_SQ_INVOKE_LINK_TEST_PROCEDURE) |
| zfcp_fc_test_link(unit->port); |
| req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
| break; |
| } |
| skip_fsfstatus: |
| if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) |
| zfcp_fsf_send_fcp_ctm_handler(req); |
| else { |
| zfcp_fsf_send_fcp_command_task_handler(req); |
| req->unit = NULL; |
| put_device(&unit->dev); |
| } |
| } |
| |
| /** |
| * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) |
| * @unit: unit where command is sent to |
| * @scsi_cmnd: scsi command to be sent |
| */ |
| int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit, |
| struct scsi_cmnd *scsi_cmnd) |
| { |
| struct zfcp_fsf_req *req; |
| struct fcp_cmnd *fcp_cmnd; |
| unsigned int sbtype = SBAL_FLAGS0_TYPE_READ; |
| int real_bytes, retval = -EIO; |
| struct zfcp_adapter *adapter = unit->port->adapter; |
| struct zfcp_qdio *qdio = adapter->qdio; |
| |
| if (unlikely(!(atomic_read(&unit->status) & |
| ZFCP_STATUS_COMMON_UNBLOCKED))) |
| return -EBUSY; |
| |
| spin_lock(&qdio->req_q_lock); |
| if (atomic_read(&qdio->req_q.count) <= 0) { |
| atomic_inc(&qdio->req_q_full); |
| goto out; |
| } |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, |
| adapter->pool.scsi_req); |
| |
| if (IS_ERR(req)) { |
| retval = PTR_ERR(req); |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; |
| get_device(&unit->dev); |
| req->unit = unit; |
| req->data = scsi_cmnd; |
| req->handler = zfcp_fsf_send_fcp_command_handler; |
| req->qtcb->header.lun_handle = unit->handle; |
| req->qtcb->header.port_handle = unit->port->handle; |
| req->qtcb->bottom.io.service_class = FSF_CLASS_3; |
| req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN; |
| |
| scsi_cmnd->host_scribble = (unsigned char *) req->req_id; |
| |
| /* |
| * set depending on data direction: |
| * data direction bits in SBALE (SB Type) |
| * data direction bits in QTCB |
| */ |
| switch (scsi_cmnd->sc_data_direction) { |
| case DMA_NONE: |
| req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; |
| break; |
| case DMA_FROM_DEVICE: |
| req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; |
| break; |
| case DMA_TO_DEVICE: |
| req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; |
| sbtype = SBAL_FLAGS0_TYPE_WRITE; |
| break; |
| case DMA_BIDIRECTIONAL: |
| goto failed_scsi_cmnd; |
| } |
| |
| fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd; |
| zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd); |
| |
| real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype, |
| scsi_sglist(scsi_cmnd), |
| FSF_MAX_SBALS_PER_REQ); |
| if (unlikely(real_bytes < 0)) { |
| if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) { |
| dev_err(&adapter->ccw_device->dev, |
| "Oversize data package, unit 0x%016Lx " |
| "on port 0x%016Lx closed\n", |
| (unsigned long long)unit->fcp_lun, |
| (unsigned long long)unit->port->wwpn); |
| zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req); |
| retval = -EINVAL; |
| } |
| goto failed_scsi_cmnd; |
| } |
| |
| retval = zfcp_fsf_req_send(req); |
| if (unlikely(retval)) |
| goto failed_scsi_cmnd; |
| |
| goto out; |
| |
| failed_scsi_cmnd: |
| put_device(&unit->dev); |
| zfcp_fsf_req_free(req); |
| scsi_cmnd->host_scribble = NULL; |
| out: |
| spin_unlock(&qdio->req_q_lock); |
| return retval; |
| } |
| |
| /** |
| * zfcp_fsf_send_fcp_ctm - send SCSI task management command |
| * @unit: pointer to struct zfcp_unit |
| * @tm_flags: unsigned byte for task management flags |
| * Returns: on success pointer to struct fsf_req, NULL otherwise |
| */ |
| struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *req = NULL; |
| struct fcp_cmnd *fcp_cmnd; |
| struct zfcp_qdio *qdio = unit->port->adapter->qdio; |
| |
| if (unlikely(!(atomic_read(&unit->status) & |
| ZFCP_STATUS_COMMON_UNBLOCKED))) |
| return NULL; |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, |
| qdio->adapter->pool.scsi_req); |
| |
| if (IS_ERR(req)) { |
| req = NULL; |
| goto out; |
| } |
| |
| req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; |
| req->data = unit; |
| req->handler = zfcp_fsf_send_fcp_command_handler; |
| req->qtcb->header.lun_handle = unit->handle; |
| req->qtcb->header.port_handle = unit->port->handle; |
| req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; |
| req->qtcb->bottom.io.service_class = FSF_CLASS_3; |
| req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN; |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; |
| sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; |
| |
| fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd; |
| zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags); |
| |
| zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); |
| if (!zfcp_fsf_req_send(req)) |
| goto out; |
| |
| zfcp_fsf_req_free(req); |
| req = NULL; |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| return req; |
| } |
| |
| static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req) |
| { |
| } |
| |
| /** |
| * zfcp_fsf_control_file - control file upload/download |
| * @adapter: pointer to struct zfcp_adapter |
| * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc |
| * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise |
| */ |
| struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, |
| struct zfcp_fsf_cfdc *fsf_cfdc) |
| { |
| struct qdio_buffer_element *sbale; |
| struct zfcp_qdio *qdio = adapter->qdio; |
| struct zfcp_fsf_req *req = NULL; |
| struct fsf_qtcb_bottom_support *bottom; |
| int direction, retval = -EIO, bytes; |
| |
| if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) |
| return ERR_PTR(-EOPNOTSUPP); |
| |
| switch (fsf_cfdc->command) { |
| case FSF_QTCB_DOWNLOAD_CONTROL_FILE: |
| direction = SBAL_FLAGS0_TYPE_WRITE; |
| break; |
| case FSF_QTCB_UPLOAD_CONTROL_FILE: |
| direction = SBAL_FLAGS0_TYPE_READ; |
| break; |
| default: |
| return ERR_PTR(-EINVAL); |
| } |
| |
| spin_lock_bh(&qdio->req_q_lock); |
| if (zfcp_fsf_req_sbal_get(qdio)) |
| goto out; |
| |
| req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL); |
| if (IS_ERR(req)) { |
| retval = -EPERM; |
| goto out; |
| } |
| |
| req->handler = zfcp_fsf_control_file_handler; |
| |
| sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req); |
| sbale[0].flags |= direction; |
| |
| bottom = &req->qtcb->bottom.support; |
| bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; |
| bottom->option = fsf_cfdc->option; |
| |
| bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, |
| direction, fsf_cfdc->sg, |
| FSF_MAX_SBALS_PER_REQ); |
| if (bytes != ZFCP_CFDC_MAX_SIZE) { |
| zfcp_fsf_req_free(req); |
| goto out; |
| } |
| |
| zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); |
| retval = zfcp_fsf_req_send(req); |
| out: |
| spin_unlock_bh(&qdio->req_q_lock); |
| |
| if (!retval) { |
| wait_for_completion(&req->completion); |
| return req; |
| } |
| return ERR_PTR(retval); |
| } |
| |
| /** |
| * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO |
| * @adapter: pointer to struct zfcp_adapter |
| * @sbal_idx: response queue index of SBAL to be processed |
| */ |
| void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx) |
| { |
| struct zfcp_adapter *adapter = qdio->adapter; |
| struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx]; |
| struct qdio_buffer_element *sbale; |
| struct zfcp_fsf_req *fsf_req; |
| unsigned long req_id; |
| int idx; |
| |
| for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) { |
| |
| sbale = &sbal->element[idx]; |
| req_id = (unsigned long) sbale->addr; |
| fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id); |
| |
| if (!fsf_req) |
| /* |
| * Unknown request means that we have potentially memory |
| * corruption and must stop the machine immediately. |
| */ |
| panic("error: unknown req_id (%lx) on adapter %s.\n", |
| req_id, dev_name(&adapter->ccw_device->dev)); |
| |
| fsf_req->queue_req.sbal_response = sbal_idx; |
| fsf_req->queue_req.qdio_inb_usage = |
| atomic_read(&qdio->resp_q.count); |
| zfcp_fsf_req_complete(fsf_req); |
| |
| if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY)) |
| break; |
| } |
| } |