1 /* 2 * zfcp device driver 3 * 4 * Implementation of FSF commands. 5 * 6 * Copyright IBM Corporation 2002, 2009 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/blktrace_api.h> 13 #include "zfcp_ext.h" 14 15 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 16 #define ZFCP_REQ_NO_QTCB 0x00000008 17 18 static void zfcp_fsf_request_timeout_handler(unsigned long data) 19 { 20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; 21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 22 "fsrth_1", NULL); 23 } 24 25 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, 26 unsigned long timeout) 27 { 28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler; 29 fsf_req->timer.data = (unsigned long) fsf_req->adapter; 30 fsf_req->timer.expires = jiffies + timeout; 31 add_timer(&fsf_req->timer); 32 } 33 34 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) 35 { 36 BUG_ON(!fsf_req->erp_action); 37 fsf_req->timer.function = zfcp_erp_timeout_handler; 38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action; 39 fsf_req->timer.expires = jiffies + 30 * HZ; 40 add_timer(&fsf_req->timer); 41 } 42 43 /* association between FSF command and FSF QTCB type */ 44 static u32 fsf_qtcb_type[] = { 45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 58 }; 59 60 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table) 61 { 62 u16 subtable = table >> 16; 63 u16 rule = table & 0xffff; 64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" }; 65 66 if (subtable && subtable < ARRAY_SIZE(act_type)) 67 dev_warn(&adapter->ccw_device->dev, 68 "Access denied according to ACT rule type %s, " 69 "rule %d\n", act_type[subtable], rule); 70 } 71 72 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req, 73 struct zfcp_port *port) 74 { 75 struct fsf_qtcb_header *header = &req->qtcb->header; 76 dev_warn(&req->adapter->ccw_device->dev, 77 "Access denied to port 0x%016Lx\n", 78 (unsigned long long)port->wwpn); 79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); 80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); 81 zfcp_erp_port_access_denied(port, "fspad_1", req); 82 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 83 } 84 85 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req, 86 struct zfcp_unit *unit) 87 { 88 struct fsf_qtcb_header *header = &req->qtcb->header; 89 dev_warn(&req->adapter->ccw_device->dev, 90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n", 91 (unsigned long long)unit->fcp_lun, 92 (unsigned long long)unit->port->wwpn); 93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); 94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); 95 zfcp_erp_unit_access_denied(unit, "fsuad_1", req); 96 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 97 } 98 99 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) 100 { 101 dev_err(&req->adapter->ccw_device->dev, "FCP device not " 102 "operational because of an unsupported FC class\n"); 103 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req); 104 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 105 } 106 107 /** 108 * zfcp_fsf_req_free - free memory used by fsf request 109 * @fsf_req: pointer to struct zfcp_fsf_req 110 */ 111 void zfcp_fsf_req_free(struct zfcp_fsf_req *req) 112 { 113 if (likely(req->pool)) { 114 mempool_free(req, req->pool); 115 return; 116 } 117 118 if (req->qtcb) { 119 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req); 120 return; 121 } 122 } 123 124 /** 125 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests 126 * @adapter: pointer to struct zfcp_adapter 127 * 128 * Never ever call this without shutting down the adapter first. 129 * Otherwise the adapter would continue using and corrupting s390 storage. 130 * Included BUG_ON() call to ensure this is done. 131 * ERP is supposed to be the only user of this function. 132 */ 133 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 134 { 135 struct zfcp_fsf_req *req, *tmp; 136 unsigned long flags; 137 LIST_HEAD(remove_queue); 138 unsigned int i; 139 140 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP); 141 spin_lock_irqsave(&adapter->req_list_lock, flags); 142 for (i = 0; i < REQUEST_LIST_SIZE; i++) 143 list_splice_init(&adapter->req_list[i], &remove_queue); 144 spin_unlock_irqrestore(&adapter->req_list_lock, flags); 145 146 list_for_each_entry_safe(req, tmp, &remove_queue, list) { 147 list_del(&req->list); 148 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 149 zfcp_fsf_req_complete(req); 150 } 151 } 152 153 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) 154 { 155 struct fsf_status_read_buffer *sr_buf = req->data; 156 struct zfcp_adapter *adapter = req->adapter; 157 struct zfcp_port *port; 158 int d_id = sr_buf->d_id & ZFCP_DID_MASK; 159 unsigned long flags; 160 161 read_lock_irqsave(&zfcp_data.config_lock, flags); 162 list_for_each_entry(port, &adapter->port_list_head, list) 163 if (port->d_id == d_id) { 164 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 165 zfcp_erp_port_reopen(port, 0, "fssrpc1", req); 166 return; 167 } 168 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 169 } 170 171 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id, 172 struct fsf_link_down_info *link_down) 173 { 174 struct zfcp_adapter *adapter = req->adapter; 175 unsigned long flags; 176 177 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 178 return; 179 180 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); 181 182 read_lock_irqsave(&zfcp_data.config_lock, flags); 183 zfcp_scsi_schedule_rports_block(adapter); 184 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 185 186 if (!link_down) 187 goto out; 188 189 switch (link_down->error_code) { 190 case FSF_PSQ_LINK_NO_LIGHT: 191 dev_warn(&req->adapter->ccw_device->dev, 192 "There is no light signal from the local " 193 "fibre channel cable\n"); 194 break; 195 case FSF_PSQ_LINK_WRAP_PLUG: 196 dev_warn(&req->adapter->ccw_device->dev, 197 "There is a wrap plug instead of a fibre " 198 "channel cable\n"); 199 break; 200 case FSF_PSQ_LINK_NO_FCP: 201 dev_warn(&req->adapter->ccw_device->dev, 202 "The adjacent fibre channel node does not " 203 "support FCP\n"); 204 break; 205 case FSF_PSQ_LINK_FIRMWARE_UPDATE: 206 dev_warn(&req->adapter->ccw_device->dev, 207 "The FCP device is suspended because of a " 208 "firmware update\n"); 209 break; 210 case FSF_PSQ_LINK_INVALID_WWPN: 211 dev_warn(&req->adapter->ccw_device->dev, 212 "The FCP device detected a WWPN that is " 213 "duplicate or not valid\n"); 214 break; 215 case FSF_PSQ_LINK_NO_NPIV_SUPPORT: 216 dev_warn(&req->adapter->ccw_device->dev, 217 "The fibre channel fabric does not support NPIV\n"); 218 break; 219 case FSF_PSQ_LINK_NO_FCP_RESOURCES: 220 dev_warn(&req->adapter->ccw_device->dev, 221 "The FCP adapter cannot support more NPIV ports\n"); 222 break; 223 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: 224 dev_warn(&req->adapter->ccw_device->dev, 225 "The adjacent switch cannot support " 226 "more NPIV ports\n"); 227 break; 228 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: 229 dev_warn(&req->adapter->ccw_device->dev, 230 "The FCP adapter could not log in to the " 231 "fibre channel fabric\n"); 232 break; 233 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: 234 dev_warn(&req->adapter->ccw_device->dev, 235 "The WWPN assignment file on the FCP adapter " 236 "has been damaged\n"); 237 break; 238 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: 239 dev_warn(&req->adapter->ccw_device->dev, 240 "The mode table on the FCP adapter " 241 "has been damaged\n"); 242 break; 243 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: 244 dev_warn(&req->adapter->ccw_device->dev, 245 "All NPIV ports on the FCP adapter have " 246 "been assigned\n"); 247 break; 248 default: 249 dev_warn(&req->adapter->ccw_device->dev, 250 "The link between the FCP adapter and " 251 "the FC fabric is down\n"); 252 } 253 out: 254 zfcp_erp_adapter_failed(adapter, id, req); 255 } 256 257 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) 258 { 259 struct fsf_status_read_buffer *sr_buf = req->data; 260 struct fsf_link_down_info *ldi = 261 (struct fsf_link_down_info *) &sr_buf->payload; 262 263 switch (sr_buf->status_subtype) { 264 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: 265 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi); 266 break; 267 case FSF_STATUS_READ_SUB_FDISC_FAILED: 268 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi); 269 break; 270 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: 271 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL); 272 }; 273 } 274 275 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) 276 { 277 struct zfcp_adapter *adapter = req->adapter; 278 struct fsf_status_read_buffer *sr_buf = req->data; 279 280 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 281 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf); 282 mempool_free(sr_buf, adapter->pool.data_status_read); 283 zfcp_fsf_req_free(req); 284 return; 285 } 286 287 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf); 288 289 switch (sr_buf->status_type) { 290 case FSF_STATUS_READ_PORT_CLOSED: 291 zfcp_fsf_status_read_port_closed(req); 292 break; 293 case FSF_STATUS_READ_INCOMING_ELS: 294 zfcp_fc_incoming_els(req); 295 break; 296 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 297 break; 298 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 299 dev_warn(&adapter->ccw_device->dev, 300 "The error threshold for checksum statistics " 301 "has been exceeded\n"); 302 zfcp_hba_dbf_event_berr(adapter, req); 303 break; 304 case FSF_STATUS_READ_LINK_DOWN: 305 zfcp_fsf_status_read_link_down(req); 306 break; 307 case FSF_STATUS_READ_LINK_UP: 308 dev_info(&adapter->ccw_device->dev, 309 "The local link has been restored\n"); 310 /* All ports should be marked as ready to run again */ 311 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL, 312 ZFCP_STATUS_COMMON_RUNNING, 313 ZFCP_SET); 314 zfcp_erp_adapter_reopen(adapter, 315 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 316 ZFCP_STATUS_COMMON_ERP_FAILED, 317 "fssrh_2", req); 318 break; 319 case FSF_STATUS_READ_NOTIFICATION_LOST: 320 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED) 321 zfcp_erp_adapter_access_changed(adapter, "fssrh_3", 322 req); 323 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) 324 schedule_work(&adapter->scan_work); 325 break; 326 case FSF_STATUS_READ_CFDC_UPDATED: 327 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req); 328 break; 329 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: 330 adapter->adapter_features = sr_buf->payload.word[0]; 331 break; 332 } 333 334 mempool_free(sr_buf, adapter->pool.data_status_read); 335 zfcp_fsf_req_free(req); 336 337 atomic_inc(&adapter->stat_miss); 338 queue_work(zfcp_data.work_queue, &adapter->stat_work); 339 } 340 341 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) 342 { 343 switch (req->qtcb->header.fsf_status_qual.word[0]) { 344 case FSF_SQ_FCP_RSP_AVAILABLE: 345 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 346 case FSF_SQ_NO_RETRY_POSSIBLE: 347 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 348 return; 349 case FSF_SQ_COMMAND_ABORTED: 350 req->status |= ZFCP_STATUS_FSFREQ_ABORTED; 351 break; 352 case FSF_SQ_NO_RECOM: 353 dev_err(&req->adapter->ccw_device->dev, 354 "The FCP adapter reported a problem " 355 "that cannot be recovered\n"); 356 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req); 357 break; 358 } 359 /* all non-return stats set FSFREQ_ERROR*/ 360 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 361 } 362 363 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) 364 { 365 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) 366 return; 367 368 switch (req->qtcb->header.fsf_status) { 369 case FSF_UNKNOWN_COMMAND: 370 dev_err(&req->adapter->ccw_device->dev, 371 "The FCP adapter does not recognize the command 0x%x\n", 372 req->qtcb->header.fsf_command); 373 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req); 374 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 375 break; 376 case FSF_ADAPTER_STATUS_AVAILABLE: 377 zfcp_fsf_fsfstatus_qual_eval(req); 378 break; 379 } 380 } 381 382 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) 383 { 384 struct zfcp_adapter *adapter = req->adapter; 385 struct fsf_qtcb *qtcb = req->qtcb; 386 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; 387 388 zfcp_hba_dbf_event_fsf_response(req); 389 390 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 391 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 392 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ 393 return; 394 } 395 396 switch (qtcb->prefix.prot_status) { 397 case FSF_PROT_GOOD: 398 case FSF_PROT_FSF_STATUS_PRESENTED: 399 return; 400 case FSF_PROT_QTCB_VERSION_ERROR: 401 dev_err(&adapter->ccw_device->dev, 402 "QTCB version 0x%x not supported by FCP adapter " 403 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION, 404 psq->word[0], psq->word[1]); 405 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req); 406 break; 407 case FSF_PROT_ERROR_STATE: 408 case FSF_PROT_SEQ_NUMB_ERROR: 409 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req); 410 req->status |= ZFCP_STATUS_FSFREQ_RETRY; 411 break; 412 case FSF_PROT_UNSUPP_QTCB_TYPE: 413 dev_err(&adapter->ccw_device->dev, 414 "The QTCB type is not supported by the FCP adapter\n"); 415 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req); 416 break; 417 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 418 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 419 &adapter->status); 420 break; 421 case FSF_PROT_DUPLICATE_REQUEST_ID: 422 dev_err(&adapter->ccw_device->dev, 423 "0x%Lx is an ambiguous request identifier\n", 424 (unsigned long long)qtcb->bottom.support.req_handle); 425 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req); 426 break; 427 case FSF_PROT_LINK_DOWN: 428 zfcp_fsf_link_down_info_eval(req, "fspse_5", 429 &psq->link_down_info); 430 /* FIXME: reopening adapter now? better wait for link up */ 431 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req); 432 break; 433 case FSF_PROT_REEST_QUEUE: 434 /* All ports should be marked as ready to run again */ 435 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL, 436 ZFCP_STATUS_COMMON_RUNNING, 437 ZFCP_SET); 438 zfcp_erp_adapter_reopen(adapter, 439 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 440 ZFCP_STATUS_COMMON_ERP_FAILED, 441 "fspse_8", req); 442 break; 443 default: 444 dev_err(&adapter->ccw_device->dev, 445 "0x%x is not a valid transfer protocol status\n", 446 qtcb->prefix.prot_status); 447 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req); 448 } 449 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 450 } 451 452 /** 453 * zfcp_fsf_req_complete - process completion of a FSF request 454 * @fsf_req: The FSF request that has been completed. 455 * 456 * When a request has been completed either from the FCP adapter, 457 * or it has been dismissed due to a queue shutdown, this function 458 * is called to process the completion status and trigger further 459 * events related to the FSF request. 460 */ 461 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req) 462 { 463 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { 464 zfcp_fsf_status_read_handler(req); 465 return; 466 } 467 468 del_timer(&req->timer); 469 zfcp_fsf_protstatus_eval(req); 470 zfcp_fsf_fsfstatus_eval(req); 471 req->handler(req); 472 473 if (req->erp_action) 474 zfcp_erp_notify(req->erp_action, 0); 475 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; 476 477 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 478 zfcp_fsf_req_free(req); 479 else 480 /* notify initiator waiting for the requests completion */ 481 /* 482 * FIXME: Race! We must not access fsf_req here as it might have been 483 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED 484 * flag. It's an improbable case. But, we have the same paranoia for 485 * the cleanup flag already. 486 * Might better be handled using complete()? 487 * (setting the flag and doing wakeup ought to be atomic 488 * with regard to checking the flag as long as waitqueue is 489 * part of the to be released structure) 490 */ 491 wake_up(&req->completion_wq); 492 } 493 494 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) 495 { 496 struct fsf_qtcb_bottom_config *bottom; 497 struct zfcp_adapter *adapter = req->adapter; 498 struct Scsi_Host *shost = adapter->scsi_host; 499 500 bottom = &req->qtcb->bottom.config; 501 502 if (req->data) 503 memcpy(req->data, bottom, sizeof(*bottom)); 504 505 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; 506 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; 507 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; 508 fc_host_speed(shost) = bottom->fc_link_speed; 509 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; 510 511 adapter->hydra_version = bottom->adapter_type; 512 adapter->timer_ticks = bottom->timer_interval; 513 514 if (fc_host_permanent_port_name(shost) == -1) 515 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 516 517 switch (bottom->fc_topology) { 518 case FSF_TOPO_P2P: 519 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; 520 adapter->peer_wwpn = bottom->plogi_payload.wwpn; 521 adapter->peer_wwnn = bottom->plogi_payload.wwnn; 522 fc_host_port_type(shost) = FC_PORTTYPE_PTP; 523 break; 524 case FSF_TOPO_FABRIC: 525 fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 526 break; 527 case FSF_TOPO_AL: 528 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; 529 default: 530 dev_err(&adapter->ccw_device->dev, 531 "Unknown or unsupported arbitrated loop " 532 "fibre channel topology detected\n"); 533 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req); 534 return -EIO; 535 } 536 537 return 0; 538 } 539 540 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) 541 { 542 struct zfcp_adapter *adapter = req->adapter; 543 struct fsf_qtcb *qtcb = req->qtcb; 544 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config; 545 struct Scsi_Host *shost = adapter->scsi_host; 546 547 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 548 return; 549 550 adapter->fsf_lic_version = bottom->lic_version; 551 adapter->adapter_features = bottom->adapter_features; 552 adapter->connection_features = bottom->connection_features; 553 adapter->peer_wwpn = 0; 554 adapter->peer_wwnn = 0; 555 adapter->peer_d_id = 0; 556 557 switch (qtcb->header.fsf_status) { 558 case FSF_GOOD: 559 if (zfcp_fsf_exchange_config_evaluate(req)) 560 return; 561 562 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 563 dev_err(&adapter->ccw_device->dev, 564 "FCP adapter maximum QTCB size (%d bytes) " 565 "is too small\n", 566 bottom->max_qtcb_size); 567 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req); 568 return; 569 } 570 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 571 &adapter->status); 572 break; 573 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 574 fc_host_node_name(shost) = 0; 575 fc_host_port_name(shost) = 0; 576 fc_host_port_id(shost) = 0; 577 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 578 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 579 adapter->hydra_version = 0; 580 581 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 582 &adapter->status); 583 584 zfcp_fsf_link_down_info_eval(req, "fsecdh2", 585 &qtcb->header.fsf_status_qual.link_down_info); 586 break; 587 default: 588 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req); 589 return; 590 } 591 592 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { 593 adapter->hardware_version = bottom->hardware_version; 594 memcpy(fc_host_serial_number(shost), bottom->serial_number, 595 min(FC_SERIAL_NUMBER_SIZE, 17)); 596 EBCASC(fc_host_serial_number(shost), 597 min(FC_SERIAL_NUMBER_SIZE, 17)); 598 } 599 600 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) { 601 dev_err(&adapter->ccw_device->dev, 602 "The FCP adapter only supports newer " 603 "control block versions\n"); 604 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req); 605 return; 606 } 607 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) { 608 dev_err(&adapter->ccw_device->dev, 609 "The FCP adapter only supports older " 610 "control block versions\n"); 611 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req); 612 } 613 } 614 615 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) 616 { 617 struct zfcp_adapter *adapter = req->adapter; 618 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port; 619 struct Scsi_Host *shost = adapter->scsi_host; 620 621 if (req->data) 622 memcpy(req->data, bottom, sizeof(*bottom)); 623 624 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) { 625 fc_host_permanent_port_name(shost) = bottom->wwpn; 626 fc_host_port_type(shost) = FC_PORTTYPE_NPIV; 627 } else 628 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 629 fc_host_maxframe_size(shost) = bottom->maximum_frame_size; 630 fc_host_supported_speeds(shost) = bottom->supported_speed; 631 } 632 633 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) 634 { 635 struct fsf_qtcb *qtcb = req->qtcb; 636 637 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 638 return; 639 640 switch (qtcb->header.fsf_status) { 641 case FSF_GOOD: 642 zfcp_fsf_exchange_port_evaluate(req); 643 break; 644 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 645 zfcp_fsf_exchange_port_evaluate(req); 646 zfcp_fsf_link_down_info_eval(req, "fsepdh1", 647 &qtcb->header.fsf_status_qual.link_down_info); 648 break; 649 } 650 } 651 652 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter) 653 { 654 struct zfcp_qdio_queue *req_q = &adapter->req_q; 655 656 spin_lock_bh(&adapter->req_q_lock); 657 if (atomic_read(&req_q->count)) 658 return 1; 659 spin_unlock_bh(&adapter->req_q_lock); 660 return 0; 661 } 662 663 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) 664 { 665 long ret; 666 667 spin_unlock_bh(&adapter->req_q_lock); 668 ret = wait_event_interruptible_timeout(adapter->request_wq, 669 zfcp_fsf_sbal_check(adapter), 5 * HZ); 670 if (ret > 0) 671 return 0; 672 if (!ret) 673 atomic_inc(&adapter->qdio_outb_full); 674 675 spin_lock_bh(&adapter->req_q_lock); 676 return -EIO; 677 } 678 679 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool) 680 { 681 struct zfcp_fsf_req *req; 682 req = mempool_alloc(pool, GFP_ATOMIC); 683 if (!req) 684 return NULL; 685 memset(req, 0, sizeof(*req)); 686 req->pool = pool; 687 return req; 688 } 689 690 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool) 691 { 692 struct zfcp_fsf_req_qtcb *qtcb; 693 694 if (likely(pool)) 695 qtcb = mempool_alloc(pool, GFP_ATOMIC); 696 else 697 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, 698 GFP_ATOMIC); 699 if (unlikely(!qtcb)) 700 return NULL; 701 702 memset(qtcb, 0, sizeof(*qtcb)); 703 qtcb->fsf_req.qtcb = &qtcb->qtcb; 704 qtcb->fsf_req.pool = pool; 705 706 return &qtcb->fsf_req; 707 } 708 709 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter, 710 u32 fsf_cmd, int req_flags, 711 mempool_t *pool) 712 { 713 struct qdio_buffer_element *sbale; 714 715 struct zfcp_fsf_req *req; 716 struct zfcp_qdio_queue *req_q = &adapter->req_q; 717 718 if (req_flags & ZFCP_REQ_NO_QTCB) 719 req = zfcp_fsf_alloc_noqtcb(pool); 720 else 721 req = zfcp_fsf_alloc_qtcb(pool); 722 723 if (unlikely(!req)) 724 return ERR_PTR(-EIO); 725 726 if (adapter->req_no == 0) 727 adapter->req_no++; 728 729 INIT_LIST_HEAD(&req->list); 730 init_timer(&req->timer); 731 init_waitqueue_head(&req->completion_wq); 732 733 req->adapter = adapter; 734 req->fsf_command = fsf_cmd; 735 req->req_id = adapter->req_no; 736 req->sbal_number = 1; 737 req->sbal_first = req_q->first; 738 req->sbal_last = req_q->first; 739 req->sbale_curr = 1; 740 741 sbale = zfcp_qdio_sbale_req(req); 742 sbale[0].addr = (void *) req->req_id; 743 sbale[0].flags |= SBAL_FLAGS0_COMMAND; 744 745 if (likely(req->qtcb)) { 746 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no; 747 req->qtcb->prefix.req_id = req->req_id; 748 req->qtcb->prefix.ulp_info = 26; 749 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command]; 750 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; 751 req->qtcb->header.req_handle = req->req_id; 752 req->qtcb->header.fsf_command = req->fsf_command; 753 req->seq_no = adapter->fsf_req_seq_no; 754 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 755 sbale[1].addr = (void *) req->qtcb; 756 sbale[1].length = sizeof(struct fsf_qtcb); 757 } 758 759 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) { 760 zfcp_fsf_req_free(req); 761 return ERR_PTR(-EIO); 762 } 763 764 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) 765 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 766 767 return req; 768 } 769 770 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) 771 { 772 struct zfcp_adapter *adapter = req->adapter; 773 unsigned long flags; 774 int idx; 775 int with_qtcb = (req->qtcb != NULL); 776 777 /* put allocated FSF request into hash table */ 778 spin_lock_irqsave(&adapter->req_list_lock, flags); 779 idx = zfcp_reqlist_hash(req->req_id); 780 list_add_tail(&req->list, &adapter->req_list[idx]); 781 spin_unlock_irqrestore(&adapter->req_list_lock, flags); 782 783 req->qdio_outb_usage = atomic_read(&adapter->req_q.count); 784 req->issued = get_clock(); 785 if (zfcp_qdio_send(req)) { 786 del_timer(&req->timer); 787 spin_lock_irqsave(&adapter->req_list_lock, flags); 788 /* lookup request again, list might have changed */ 789 if (zfcp_reqlist_find_safe(adapter, req)) 790 zfcp_reqlist_remove(adapter, req); 791 spin_unlock_irqrestore(&adapter->req_list_lock, flags); 792 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req); 793 return -EIO; 794 } 795 796 /* Don't increase for unsolicited status */ 797 if (with_qtcb) 798 adapter->fsf_req_seq_no++; 799 adapter->req_no++; 800 801 return 0; 802 } 803 804 /** 805 * zfcp_fsf_status_read - send status read request 806 * @adapter: pointer to struct zfcp_adapter 807 * @req_flags: request flags 808 * Returns: 0 on success, ERROR otherwise 809 */ 810 int zfcp_fsf_status_read(struct zfcp_adapter *adapter) 811 { 812 struct zfcp_fsf_req *req; 813 struct fsf_status_read_buffer *sr_buf; 814 struct qdio_buffer_element *sbale; 815 int retval = -EIO; 816 817 spin_lock_bh(&adapter->req_q_lock); 818 if (zfcp_fsf_req_sbal_get(adapter)) 819 goto out; 820 821 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 822 ZFCP_REQ_NO_QTCB, 823 adapter->pool.fsf_req_status_read); 824 if (IS_ERR(req)) { 825 retval = PTR_ERR(req); 826 goto out; 827 } 828 829 sbale = zfcp_qdio_sbale_req(req); 830 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; 831 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; 832 req->sbale_curr = 2; 833 834 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); 835 if (!sr_buf) { 836 retval = -ENOMEM; 837 goto failed_buf; 838 } 839 memset(sr_buf, 0, sizeof(*sr_buf)); 840 req->data = sr_buf; 841 sbale = zfcp_qdio_sbale_curr(req); 842 sbale->addr = (void *) sr_buf; 843 sbale->length = sizeof(*sr_buf); 844 845 retval = zfcp_fsf_req_send(req); 846 if (retval) 847 goto failed_req_send; 848 849 goto out; 850 851 failed_req_send: 852 mempool_free(sr_buf, adapter->pool.data_status_read); 853 failed_buf: 854 zfcp_fsf_req_free(req); 855 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); 856 out: 857 spin_unlock_bh(&adapter->req_q_lock); 858 return retval; 859 } 860 861 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) 862 { 863 struct zfcp_unit *unit = req->data; 864 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual; 865 866 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 867 return; 868 869 switch (req->qtcb->header.fsf_status) { 870 case FSF_PORT_HANDLE_NOT_VALID: 871 if (fsq->word[0] == fsq->word[1]) { 872 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 873 "fsafch1", req); 874 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 875 } 876 break; 877 case FSF_LUN_HANDLE_NOT_VALID: 878 if (fsq->word[0] == fsq->word[1]) { 879 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req); 880 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 881 } 882 break; 883 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 884 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 885 break; 886 case FSF_PORT_BOXED: 887 zfcp_erp_port_boxed(unit->port, "fsafch3", req); 888 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 889 ZFCP_STATUS_FSFREQ_RETRY; 890 break; 891 case FSF_LUN_BOXED: 892 zfcp_erp_unit_boxed(unit, "fsafch4", req); 893 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 894 ZFCP_STATUS_FSFREQ_RETRY; 895 break; 896 case FSF_ADAPTER_STATUS_AVAILABLE: 897 switch (fsq->word[0]) { 898 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 899 zfcp_test_link(unit->port); 900 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 901 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 902 break; 903 } 904 break; 905 case FSF_GOOD: 906 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 907 break; 908 } 909 } 910 911 /** 912 * zfcp_fsf_abort_fcp_command - abort running SCSI command 913 * @old_req_id: unsigned long 914 * @unit: pointer to struct zfcp_unit 915 * Returns: pointer to struct zfcp_fsf_req 916 */ 917 918 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, 919 struct zfcp_unit *unit) 920 { 921 struct qdio_buffer_element *sbale; 922 struct zfcp_fsf_req *req = NULL; 923 struct zfcp_adapter *adapter = unit->port->adapter; 924 925 spin_lock_bh(&adapter->req_q_lock); 926 if (zfcp_fsf_req_sbal_get(adapter)) 927 goto out; 928 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, 929 0, adapter->pool.fsf_req_abort); 930 if (IS_ERR(req)) { 931 req = NULL; 932 goto out; 933 } 934 935 if (unlikely(!(atomic_read(&unit->status) & 936 ZFCP_STATUS_COMMON_UNBLOCKED))) 937 goto out_error_free; 938 939 sbale = zfcp_qdio_sbale_req(req); 940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 942 943 req->data = unit; 944 req->handler = zfcp_fsf_abort_fcp_command_handler; 945 req->qtcb->header.lun_handle = unit->handle; 946 req->qtcb->header.port_handle = unit->port->handle; 947 req->qtcb->bottom.support.req_handle = (u64) old_req_id; 948 949 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); 950 if (!zfcp_fsf_req_send(req)) 951 goto out; 952 953 out_error_free: 954 zfcp_fsf_req_free(req); 955 req = NULL; 956 out: 957 spin_unlock_bh(&adapter->req_q_lock); 958 return req; 959 } 960 961 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req) 962 { 963 struct zfcp_adapter *adapter = req->adapter; 964 struct zfcp_send_ct *send_ct = req->data; 965 struct fsf_qtcb_header *header = &req->qtcb->header; 966 967 send_ct->status = -EINVAL; 968 969 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 970 goto skip_fsfstatus; 971 972 switch (header->fsf_status) { 973 case FSF_GOOD: 974 zfcp_san_dbf_event_ct_response(req); 975 send_ct->status = 0; 976 break; 977 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 978 zfcp_fsf_class_not_supp(req); 979 break; 980 case FSF_ADAPTER_STATUS_AVAILABLE: 981 switch (header->fsf_status_qual.word[0]){ 982 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 983 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 984 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 985 break; 986 } 987 break; 988 case FSF_ACCESS_DENIED: 989 break; 990 case FSF_PORT_BOXED: 991 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 992 ZFCP_STATUS_FSFREQ_RETRY; 993 break; 994 case FSF_PORT_HANDLE_NOT_VALID: 995 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req); 996 case FSF_GENERIC_COMMAND_REJECTED: 997 case FSF_PAYLOAD_SIZE_MISMATCH: 998 case FSF_REQUEST_SIZE_TOO_LARGE: 999 case FSF_RESPONSE_SIZE_TOO_LARGE: 1000 case FSF_SBAL_MISMATCH: 1001 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1002 break; 1003 } 1004 1005 skip_fsfstatus: 1006 if (send_ct->handler) 1007 send_ct->handler(send_ct->handler_data); 1008 } 1009 1010 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, 1011 struct scatterlist *sg_req, 1012 struct scatterlist *sg_resp, 1013 int max_sbals) 1014 { 1015 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req); 1016 u32 feat = req->adapter->adapter_features; 1017 int bytes; 1018 1019 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) { 1020 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE || 1021 !sg_is_last(sg_req) || !sg_is_last(sg_resp)) 1022 return -EOPNOTSUPP; 1023 1024 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1025 sbale[2].addr = sg_virt(sg_req); 1026 sbale[2].length = sg_req->length; 1027 sbale[3].addr = sg_virt(sg_resp); 1028 sbale[3].length = sg_resp->length; 1029 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1030 return 0; 1031 } 1032 1033 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, 1034 sg_req, max_sbals); 1035 if (bytes <= 0) 1036 return -ENOMEM; 1037 req->qtcb->bottom.support.req_buf_length = bytes; 1038 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1039 1040 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, 1041 sg_resp, max_sbals); 1042 if (bytes <= 0) 1043 return -ENOMEM; 1044 req->qtcb->bottom.support.resp_buf_length = bytes; 1045 1046 return 0; 1047 } 1048 1049 /** 1050 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1051 * @ct: pointer to struct zfcp_send_ct with data for request 1052 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req 1053 * @erp_action: if non-null the Generic Service request sent within ERP 1054 */ 1055 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, 1056 struct zfcp_erp_action *erp_action) 1057 { 1058 struct zfcp_wka_port *wka_port = ct->wka_port; 1059 struct zfcp_adapter *adapter = wka_port->adapter; 1060 struct zfcp_fsf_req *req; 1061 int ret = -EIO; 1062 1063 spin_lock_bh(&adapter->req_q_lock); 1064 if (zfcp_fsf_req_sbal_get(adapter)) 1065 goto out; 1066 1067 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, 1068 ZFCP_REQ_AUTO_CLEANUP, pool); 1069 if (IS_ERR(req)) { 1070 ret = PTR_ERR(req); 1071 goto out; 1072 } 1073 1074 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp, 1075 FSF_MAX_SBALS_PER_REQ); 1076 if (ret) 1077 goto failed_send; 1078 1079 req->handler = zfcp_fsf_send_ct_handler; 1080 req->qtcb->header.port_handle = wka_port->handle; 1081 req->qtcb->bottom.support.service_class = FSF_CLASS_3; 1082 req->qtcb->bottom.support.timeout = ct->timeout; 1083 req->data = ct; 1084 1085 zfcp_san_dbf_event_ct_request(req); 1086 1087 if (erp_action) { 1088 erp_action->fsf_req = req; 1089 req->erp_action = erp_action; 1090 zfcp_fsf_start_erp_timer(req); 1091 } else 1092 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1093 1094 ret = zfcp_fsf_req_send(req); 1095 if (ret) 1096 goto failed_send; 1097 1098 goto out; 1099 1100 failed_send: 1101 zfcp_fsf_req_free(req); 1102 if (erp_action) 1103 erp_action->fsf_req = NULL; 1104 out: 1105 spin_unlock_bh(&adapter->req_q_lock); 1106 return ret; 1107 } 1108 1109 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req) 1110 { 1111 struct zfcp_send_els *send_els = req->data; 1112 struct zfcp_port *port = send_els->port; 1113 struct fsf_qtcb_header *header = &req->qtcb->header; 1114 1115 send_els->status = -EINVAL; 1116 1117 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1118 goto skip_fsfstatus; 1119 1120 switch (header->fsf_status) { 1121 case FSF_GOOD: 1122 zfcp_san_dbf_event_els_response(req); 1123 send_els->status = 0; 1124 break; 1125 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1126 zfcp_fsf_class_not_supp(req); 1127 break; 1128 case FSF_ADAPTER_STATUS_AVAILABLE: 1129 switch (header->fsf_status_qual.word[0]){ 1130 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1131 if (port && (send_els->ls_code != ZFCP_LS_ADISC)) 1132 zfcp_test_link(port); 1133 /*fall through */ 1134 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1135 case FSF_SQ_RETRY_IF_POSSIBLE: 1136 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1137 break; 1138 } 1139 break; 1140 case FSF_ELS_COMMAND_REJECTED: 1141 case FSF_PAYLOAD_SIZE_MISMATCH: 1142 case FSF_REQUEST_SIZE_TOO_LARGE: 1143 case FSF_RESPONSE_SIZE_TOO_LARGE: 1144 break; 1145 case FSF_ACCESS_DENIED: 1146 zfcp_fsf_access_denied_port(req, port); 1147 break; 1148 case FSF_SBAL_MISMATCH: 1149 /* should never occure, avoided in zfcp_fsf_send_els */ 1150 /* fall through */ 1151 default: 1152 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1153 break; 1154 } 1155 skip_fsfstatus: 1156 if (send_els->handler) 1157 send_els->handler(send_els->handler_data); 1158 } 1159 1160 /** 1161 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1162 * @els: pointer to struct zfcp_send_els with data for the command 1163 */ 1164 int zfcp_fsf_send_els(struct zfcp_send_els *els) 1165 { 1166 struct zfcp_fsf_req *req; 1167 struct zfcp_adapter *adapter = els->adapter; 1168 struct fsf_qtcb_bottom_support *bottom; 1169 int ret = -EIO; 1170 1171 spin_lock_bh(&adapter->req_q_lock); 1172 if (zfcp_fsf_req_sbal_get(adapter)) 1173 goto out; 1174 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, 1175 ZFCP_REQ_AUTO_CLEANUP, NULL); 1176 if (IS_ERR(req)) { 1177 ret = PTR_ERR(req); 1178 goto out; 1179 } 1180 1181 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2); 1182 1183 if (ret) 1184 goto failed_send; 1185 1186 bottom = &req->qtcb->bottom.support; 1187 req->handler = zfcp_fsf_send_els_handler; 1188 bottom->d_id = els->d_id; 1189 bottom->service_class = FSF_CLASS_3; 1190 bottom->timeout = 2 * R_A_TOV; 1191 req->data = els; 1192 1193 zfcp_san_dbf_event_els_request(req); 1194 1195 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1196 ret = zfcp_fsf_req_send(req); 1197 if (ret) 1198 goto failed_send; 1199 1200 goto out; 1201 1202 failed_send: 1203 zfcp_fsf_req_free(req); 1204 out: 1205 spin_unlock_bh(&adapter->req_q_lock); 1206 return ret; 1207 } 1208 1209 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 1210 { 1211 struct qdio_buffer_element *sbale; 1212 struct zfcp_fsf_req *req; 1213 struct zfcp_adapter *adapter = erp_action->adapter; 1214 int retval = -EIO; 1215 1216 spin_lock_bh(&adapter->req_q_lock); 1217 if (zfcp_fsf_req_sbal_get(adapter)) 1218 goto out; 1219 req = zfcp_fsf_req_create(adapter, 1220 FSF_QTCB_EXCHANGE_CONFIG_DATA, 1221 ZFCP_REQ_AUTO_CLEANUP, 1222 adapter->pool.fsf_req_erp); 1223 if (IS_ERR(req)) { 1224 retval = PTR_ERR(req); 1225 goto out; 1226 } 1227 1228 sbale = zfcp_qdio_sbale_req(req); 1229 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1230 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1231 1232 req->qtcb->bottom.config.feature_selection = 1233 FSF_FEATURE_CFDC | 1234 FSF_FEATURE_LUN_SHARING | 1235 FSF_FEATURE_NOTIFICATION_LOST | 1236 FSF_FEATURE_UPDATE_ALERT; 1237 req->erp_action = erp_action; 1238 req->handler = zfcp_fsf_exchange_config_data_handler; 1239 erp_action->fsf_req = req; 1240 1241 zfcp_fsf_start_erp_timer(req); 1242 retval = zfcp_fsf_req_send(req); 1243 if (retval) { 1244 zfcp_fsf_req_free(req); 1245 erp_action->fsf_req = NULL; 1246 } 1247 out: 1248 spin_unlock_bh(&adapter->req_q_lock); 1249 return retval; 1250 } 1251 1252 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, 1253 struct fsf_qtcb_bottom_config *data) 1254 { 1255 struct qdio_buffer_element *sbale; 1256 struct zfcp_fsf_req *req = NULL; 1257 int retval = -EIO; 1258 1259 spin_lock_bh(&adapter->req_q_lock); 1260 if (zfcp_fsf_req_sbal_get(adapter)) 1261 goto out_unlock; 1262 1263 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, 1264 0, NULL); 1265 if (IS_ERR(req)) { 1266 retval = PTR_ERR(req); 1267 goto out_unlock; 1268 } 1269 1270 sbale = zfcp_qdio_sbale_req(req); 1271 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1272 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1273 req->handler = zfcp_fsf_exchange_config_data_handler; 1274 1275 req->qtcb->bottom.config.feature_selection = 1276 FSF_FEATURE_CFDC | 1277 FSF_FEATURE_LUN_SHARING | 1278 FSF_FEATURE_NOTIFICATION_LOST | 1279 FSF_FEATURE_UPDATE_ALERT; 1280 1281 if (data) 1282 req->data = data; 1283 1284 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1285 retval = zfcp_fsf_req_send(req); 1286 spin_unlock_bh(&adapter->req_q_lock); 1287 if (!retval) 1288 wait_event(req->completion_wq, 1289 req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 1290 1291 zfcp_fsf_req_free(req); 1292 return retval; 1293 1294 out_unlock: 1295 spin_unlock_bh(&adapter->req_q_lock); 1296 return retval; 1297 } 1298 1299 /** 1300 * zfcp_fsf_exchange_port_data - request information about local port 1301 * @erp_action: ERP action for the adapter for which port data is requested 1302 * Returns: 0 on success, error otherwise 1303 */ 1304 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) 1305 { 1306 struct qdio_buffer_element *sbale; 1307 struct zfcp_fsf_req *req; 1308 struct zfcp_adapter *adapter = erp_action->adapter; 1309 int retval = -EIO; 1310 1311 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) 1312 return -EOPNOTSUPP; 1313 1314 spin_lock_bh(&adapter->req_q_lock); 1315 if (zfcp_fsf_req_sbal_get(adapter)) 1316 goto out; 1317 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 1318 ZFCP_REQ_AUTO_CLEANUP, 1319 adapter->pool.fsf_req_erp); 1320 if (IS_ERR(req)) { 1321 retval = PTR_ERR(req); 1322 goto out; 1323 } 1324 1325 sbale = zfcp_qdio_sbale_req(req); 1326 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1327 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1328 1329 req->handler = zfcp_fsf_exchange_port_data_handler; 1330 req->erp_action = erp_action; 1331 erp_action->fsf_req = req; 1332 1333 zfcp_fsf_start_erp_timer(req); 1334 retval = zfcp_fsf_req_send(req); 1335 if (retval) { 1336 zfcp_fsf_req_free(req); 1337 erp_action->fsf_req = NULL; 1338 } 1339 out: 1340 spin_unlock_bh(&adapter->req_q_lock); 1341 return retval; 1342 } 1343 1344 /** 1345 * zfcp_fsf_exchange_port_data_sync - request information about local port 1346 * @adapter: pointer to struct zfcp_adapter 1347 * @data: pointer to struct fsf_qtcb_bottom_port 1348 * Returns: 0 on success, error otherwise 1349 */ 1350 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, 1351 struct fsf_qtcb_bottom_port *data) 1352 { 1353 struct qdio_buffer_element *sbale; 1354 struct zfcp_fsf_req *req = NULL; 1355 int retval = -EIO; 1356 1357 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) 1358 return -EOPNOTSUPP; 1359 1360 spin_lock_bh(&adapter->req_q_lock); 1361 if (zfcp_fsf_req_sbal_get(adapter)) 1362 goto out_unlock; 1363 1364 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0, 1365 NULL); 1366 if (IS_ERR(req)) { 1367 retval = PTR_ERR(req); 1368 goto out_unlock; 1369 } 1370 1371 if (data) 1372 req->data = data; 1373 1374 sbale = zfcp_qdio_sbale_req(req); 1375 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1376 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1377 1378 req->handler = zfcp_fsf_exchange_port_data_handler; 1379 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1380 retval = zfcp_fsf_req_send(req); 1381 spin_unlock_bh(&adapter->req_q_lock); 1382 1383 if (!retval) 1384 wait_event(req->completion_wq, 1385 req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 1386 zfcp_fsf_req_free(req); 1387 1388 return retval; 1389 1390 out_unlock: 1391 spin_unlock_bh(&adapter->req_q_lock); 1392 return retval; 1393 } 1394 1395 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) 1396 { 1397 struct zfcp_port *port = req->data; 1398 struct fsf_qtcb_header *header = &req->qtcb->header; 1399 struct fsf_plogi *plogi; 1400 1401 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1402 return; 1403 1404 switch (header->fsf_status) { 1405 case FSF_PORT_ALREADY_OPEN: 1406 break; 1407 case FSF_ACCESS_DENIED: 1408 zfcp_fsf_access_denied_port(req, port); 1409 break; 1410 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 1411 dev_warn(&req->adapter->ccw_device->dev, 1412 "Not enough FCP adapter resources to open " 1413 "remote port 0x%016Lx\n", 1414 (unsigned long long)port->wwpn); 1415 zfcp_erp_port_failed(port, "fsoph_1", req); 1416 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1417 break; 1418 case FSF_ADAPTER_STATUS_AVAILABLE: 1419 switch (header->fsf_status_qual.word[0]) { 1420 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1421 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1422 case FSF_SQ_NO_RETRY_POSSIBLE: 1423 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1424 break; 1425 } 1426 break; 1427 case FSF_GOOD: 1428 port->handle = header->port_handle; 1429 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | 1430 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1431 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 1432 ZFCP_STATUS_COMMON_ACCESS_BOXED, 1433 &port->status); 1434 /* check whether D_ID has changed during open */ 1435 /* 1436 * FIXME: This check is not airtight, as the FCP channel does 1437 * not monitor closures of target port connections caused on 1438 * the remote side. Thus, they might miss out on invalidating 1439 * locally cached WWPNs (and other N_Port parameters) of gone 1440 * target ports. So, our heroic attempt to make things safe 1441 * could be undermined by 'open port' response data tagged with 1442 * obsolete WWPNs. Another reason to monitor potential 1443 * connection closures ourself at least (by interpreting 1444 * incoming ELS' and unsolicited status). It just crosses my 1445 * mind that one should be able to cross-check by means of 1446 * another GID_PN straight after a port has been opened. 1447 * Alternately, an ADISC/PDISC ELS should suffice, as well. 1448 */ 1449 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els; 1450 if (req->qtcb->bottom.support.els1_length >= 1451 FSF_PLOGI_MIN_LEN) { 1452 if (plogi->serv_param.wwpn != port->wwpn) 1453 port->d_id = 0; 1454 else { 1455 port->wwnn = plogi->serv_param.wwnn; 1456 zfcp_fc_plogi_evaluate(port, plogi); 1457 } 1458 } 1459 break; 1460 case FSF_UNKNOWN_OP_SUBTYPE: 1461 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1462 break; 1463 } 1464 } 1465 1466 /** 1467 * zfcp_fsf_open_port - create and send open port request 1468 * @erp_action: pointer to struct zfcp_erp_action 1469 * Returns: 0 on success, error otherwise 1470 */ 1471 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 1472 { 1473 struct qdio_buffer_element *sbale; 1474 struct zfcp_adapter *adapter = erp_action->adapter; 1475 struct zfcp_fsf_req *req; 1476 int retval = -EIO; 1477 1478 spin_lock_bh(&adapter->req_q_lock); 1479 if (zfcp_fsf_req_sbal_get(adapter)) 1480 goto out; 1481 1482 req = zfcp_fsf_req_create(adapter, 1483 FSF_QTCB_OPEN_PORT_WITH_DID, 1484 ZFCP_REQ_AUTO_CLEANUP, 1485 adapter->pool.fsf_req_erp); 1486 if (IS_ERR(req)) { 1487 retval = PTR_ERR(req); 1488 goto out; 1489 } 1490 1491 sbale = zfcp_qdio_sbale_req(req); 1492 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1493 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1494 1495 req->handler = zfcp_fsf_open_port_handler; 1496 req->qtcb->bottom.support.d_id = erp_action->port->d_id; 1497 req->data = erp_action->port; 1498 req->erp_action = erp_action; 1499 erp_action->fsf_req = req; 1500 1501 zfcp_fsf_start_erp_timer(req); 1502 retval = zfcp_fsf_req_send(req); 1503 if (retval) { 1504 zfcp_fsf_req_free(req); 1505 erp_action->fsf_req = NULL; 1506 } 1507 out: 1508 spin_unlock_bh(&adapter->req_q_lock); 1509 return retval; 1510 } 1511 1512 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) 1513 { 1514 struct zfcp_port *port = req->data; 1515 1516 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1517 return; 1518 1519 switch (req->qtcb->header.fsf_status) { 1520 case FSF_PORT_HANDLE_NOT_VALID: 1521 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req); 1522 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1523 break; 1524 case FSF_ADAPTER_STATUS_AVAILABLE: 1525 break; 1526 case FSF_GOOD: 1527 zfcp_erp_modify_port_status(port, "fscph_2", req, 1528 ZFCP_STATUS_COMMON_OPEN, 1529 ZFCP_CLEAR); 1530 break; 1531 } 1532 } 1533 1534 /** 1535 * zfcp_fsf_close_port - create and send close port request 1536 * @erp_action: pointer to struct zfcp_erp_action 1537 * Returns: 0 on success, error otherwise 1538 */ 1539 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 1540 { 1541 struct qdio_buffer_element *sbale; 1542 struct zfcp_adapter *adapter = erp_action->adapter; 1543 struct zfcp_fsf_req *req; 1544 int retval = -EIO; 1545 1546 spin_lock_bh(&adapter->req_q_lock); 1547 if (zfcp_fsf_req_sbal_get(adapter)) 1548 goto out; 1549 1550 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT, 1551 ZFCP_REQ_AUTO_CLEANUP, 1552 adapter->pool.fsf_req_erp); 1553 if (IS_ERR(req)) { 1554 retval = PTR_ERR(req); 1555 goto out; 1556 } 1557 1558 sbale = zfcp_qdio_sbale_req(req); 1559 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1560 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1561 1562 req->handler = zfcp_fsf_close_port_handler; 1563 req->data = erp_action->port; 1564 req->erp_action = erp_action; 1565 req->qtcb->header.port_handle = erp_action->port->handle; 1566 erp_action->fsf_req = req; 1567 1568 zfcp_fsf_start_erp_timer(req); 1569 retval = zfcp_fsf_req_send(req); 1570 if (retval) { 1571 zfcp_fsf_req_free(req); 1572 erp_action->fsf_req = NULL; 1573 } 1574 out: 1575 spin_unlock_bh(&adapter->req_q_lock); 1576 return retval; 1577 } 1578 1579 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req) 1580 { 1581 struct zfcp_wka_port *wka_port = req->data; 1582 struct fsf_qtcb_header *header = &req->qtcb->header; 1583 1584 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1585 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 1586 goto out; 1587 } 1588 1589 switch (header->fsf_status) { 1590 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 1591 dev_warn(&req->adapter->ccw_device->dev, 1592 "Opening WKA port 0x%x failed\n", wka_port->d_id); 1593 case FSF_ADAPTER_STATUS_AVAILABLE: 1594 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1595 case FSF_ACCESS_DENIED: 1596 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 1597 break; 1598 case FSF_PORT_ALREADY_OPEN: 1599 break; 1600 case FSF_GOOD: 1601 wka_port->handle = header->port_handle; 1602 wka_port->status = ZFCP_WKA_PORT_ONLINE; 1603 } 1604 out: 1605 wake_up(&wka_port->completion_wq); 1606 } 1607 1608 /** 1609 * zfcp_fsf_open_wka_port - create and send open wka-port request 1610 * @wka_port: pointer to struct zfcp_wka_port 1611 * Returns: 0 on success, error otherwise 1612 */ 1613 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port) 1614 { 1615 struct qdio_buffer_element *sbale; 1616 struct zfcp_adapter *adapter = wka_port->adapter; 1617 struct zfcp_fsf_req *req; 1618 int retval = -EIO; 1619 1620 spin_lock_bh(&adapter->req_q_lock); 1621 if (zfcp_fsf_req_sbal_get(adapter)) 1622 goto out; 1623 1624 req = zfcp_fsf_req_create(adapter, 1625 FSF_QTCB_OPEN_PORT_WITH_DID, 1626 ZFCP_REQ_AUTO_CLEANUP, 1627 adapter->pool.fsf_req_erp); 1628 if (unlikely(IS_ERR(req))) { 1629 retval = PTR_ERR(req); 1630 goto out; 1631 } 1632 1633 sbale = zfcp_qdio_sbale_req(req); 1634 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1635 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1636 1637 req->handler = zfcp_fsf_open_wka_port_handler; 1638 req->qtcb->bottom.support.d_id = wka_port->d_id; 1639 req->data = wka_port; 1640 1641 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1642 retval = zfcp_fsf_req_send(req); 1643 if (retval) 1644 zfcp_fsf_req_free(req); 1645 out: 1646 spin_unlock_bh(&adapter->req_q_lock); 1647 return retval; 1648 } 1649 1650 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req) 1651 { 1652 struct zfcp_wka_port *wka_port = req->data; 1653 1654 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) { 1655 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1656 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req); 1657 } 1658 1659 wka_port->status = ZFCP_WKA_PORT_OFFLINE; 1660 wake_up(&wka_port->completion_wq); 1661 } 1662 1663 /** 1664 * zfcp_fsf_close_wka_port - create and send close wka port request 1665 * @erp_action: pointer to struct zfcp_erp_action 1666 * Returns: 0 on success, error otherwise 1667 */ 1668 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port) 1669 { 1670 struct qdio_buffer_element *sbale; 1671 struct zfcp_adapter *adapter = wka_port->adapter; 1672 struct zfcp_fsf_req *req; 1673 int retval = -EIO; 1674 1675 spin_lock_bh(&adapter->req_q_lock); 1676 if (zfcp_fsf_req_sbal_get(adapter)) 1677 goto out; 1678 1679 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT, 1680 ZFCP_REQ_AUTO_CLEANUP, 1681 adapter->pool.fsf_req_erp); 1682 if (unlikely(IS_ERR(req))) { 1683 retval = PTR_ERR(req); 1684 goto out; 1685 } 1686 1687 sbale = zfcp_qdio_sbale_req(req); 1688 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1689 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1690 1691 req->handler = zfcp_fsf_close_wka_port_handler; 1692 req->data = wka_port; 1693 req->qtcb->header.port_handle = wka_port->handle; 1694 1695 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1696 retval = zfcp_fsf_req_send(req); 1697 if (retval) 1698 zfcp_fsf_req_free(req); 1699 out: 1700 spin_unlock_bh(&adapter->req_q_lock); 1701 return retval; 1702 } 1703 1704 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) 1705 { 1706 struct zfcp_port *port = req->data; 1707 struct fsf_qtcb_header *header = &req->qtcb->header; 1708 struct zfcp_unit *unit; 1709 1710 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1711 return; 1712 1713 switch (header->fsf_status) { 1714 case FSF_PORT_HANDLE_NOT_VALID: 1715 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req); 1716 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1717 break; 1718 case FSF_ACCESS_DENIED: 1719 zfcp_fsf_access_denied_port(req, port); 1720 break; 1721 case FSF_PORT_BOXED: 1722 zfcp_erp_port_boxed(port, "fscpph2", req); 1723 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 1724 ZFCP_STATUS_FSFREQ_RETRY; 1725 /* can't use generic zfcp_erp_modify_port_status because 1726 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ 1727 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1728 list_for_each_entry(unit, &port->unit_list_head, list) 1729 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, 1730 &unit->status); 1731 break; 1732 case FSF_ADAPTER_STATUS_AVAILABLE: 1733 switch (header->fsf_status_qual.word[0]) { 1734 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1735 /* fall through */ 1736 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1737 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1738 break; 1739 } 1740 break; 1741 case FSF_GOOD: 1742 /* can't use generic zfcp_erp_modify_port_status because 1743 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 1744 */ 1745 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1746 list_for_each_entry(unit, &port->unit_list_head, list) 1747 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, 1748 &unit->status); 1749 break; 1750 } 1751 } 1752 1753 /** 1754 * zfcp_fsf_close_physical_port - close physical port 1755 * @erp_action: pointer to struct zfcp_erp_action 1756 * Returns: 0 on success 1757 */ 1758 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 1759 { 1760 struct qdio_buffer_element *sbale; 1761 struct zfcp_adapter *adapter = erp_action->adapter; 1762 struct zfcp_fsf_req *req; 1763 int retval = -EIO; 1764 1765 spin_lock_bh(&adapter->req_q_lock); 1766 if (zfcp_fsf_req_sbal_get(adapter)) 1767 goto out; 1768 1769 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT, 1770 ZFCP_REQ_AUTO_CLEANUP, 1771 adapter->pool.fsf_req_erp); 1772 if (IS_ERR(req)) { 1773 retval = PTR_ERR(req); 1774 goto out; 1775 } 1776 1777 sbale = zfcp_qdio_sbale_req(req); 1778 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1779 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1780 1781 req->data = erp_action->port; 1782 req->qtcb->header.port_handle = erp_action->port->handle; 1783 req->erp_action = erp_action; 1784 req->handler = zfcp_fsf_close_physical_port_handler; 1785 erp_action->fsf_req = req; 1786 1787 zfcp_fsf_start_erp_timer(req); 1788 retval = zfcp_fsf_req_send(req); 1789 if (retval) { 1790 zfcp_fsf_req_free(req); 1791 erp_action->fsf_req = NULL; 1792 } 1793 out: 1794 spin_unlock_bh(&adapter->req_q_lock); 1795 return retval; 1796 } 1797 1798 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req) 1799 { 1800 struct zfcp_adapter *adapter = req->adapter; 1801 struct zfcp_unit *unit = req->data; 1802 struct fsf_qtcb_header *header = &req->qtcb->header; 1803 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support; 1804 struct fsf_queue_designator *queue_designator = 1805 &header->fsf_status_qual.fsf_queue_designator; 1806 int exclusive, readwrite; 1807 1808 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1809 return; 1810 1811 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 1812 ZFCP_STATUS_COMMON_ACCESS_BOXED | 1813 ZFCP_STATUS_UNIT_SHARED | 1814 ZFCP_STATUS_UNIT_READONLY, 1815 &unit->status); 1816 1817 switch (header->fsf_status) { 1818 1819 case FSF_PORT_HANDLE_NOT_VALID: 1820 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req); 1821 /* fall through */ 1822 case FSF_LUN_ALREADY_OPEN: 1823 break; 1824 case FSF_ACCESS_DENIED: 1825 zfcp_fsf_access_denied_unit(req, unit); 1826 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 1827 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 1828 break; 1829 case FSF_PORT_BOXED: 1830 zfcp_erp_port_boxed(unit->port, "fsouh_2", req); 1831 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 1832 ZFCP_STATUS_FSFREQ_RETRY; 1833 break; 1834 case FSF_LUN_SHARING_VIOLATION: 1835 if (header->fsf_status_qual.word[0]) 1836 dev_warn(&adapter->ccw_device->dev, 1837 "LUN 0x%Lx on port 0x%Lx is already in " 1838 "use by CSS%d, MIF Image ID %x\n", 1839 (unsigned long long)unit->fcp_lun, 1840 (unsigned long long)unit->port->wwpn, 1841 queue_designator->cssid, 1842 queue_designator->hla); 1843 else 1844 zfcp_act_eval_err(adapter, 1845 header->fsf_status_qual.word[2]); 1846 zfcp_erp_unit_access_denied(unit, "fsouh_3", req); 1847 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 1848 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 1849 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1850 break; 1851 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 1852 dev_warn(&adapter->ccw_device->dev, 1853 "No handle is available for LUN " 1854 "0x%016Lx on port 0x%016Lx\n", 1855 (unsigned long long)unit->fcp_lun, 1856 (unsigned long long)unit->port->wwpn); 1857 zfcp_erp_unit_failed(unit, "fsouh_4", req); 1858 /* fall through */ 1859 case FSF_INVALID_COMMAND_OPTION: 1860 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1861 break; 1862 case FSF_ADAPTER_STATUS_AVAILABLE: 1863 switch (header->fsf_status_qual.word[0]) { 1864 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1865 zfcp_test_link(unit->port); 1866 /* fall through */ 1867 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1868 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1869 break; 1870 } 1871 break; 1872 1873 case FSF_GOOD: 1874 unit->handle = header->lun_handle; 1875 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 1876 1877 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && 1878 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && 1879 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) { 1880 exclusive = (bottom->lun_access_info & 1881 FSF_UNIT_ACCESS_EXCLUSIVE); 1882 readwrite = (bottom->lun_access_info & 1883 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER); 1884 1885 if (!exclusive) 1886 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, 1887 &unit->status); 1888 1889 if (!readwrite) { 1890 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, 1891 &unit->status); 1892 dev_info(&adapter->ccw_device->dev, 1893 "SCSI device at LUN 0x%016Lx on port " 1894 "0x%016Lx opened read-only\n", 1895 (unsigned long long)unit->fcp_lun, 1896 (unsigned long long)unit->port->wwpn); 1897 } 1898 1899 if (exclusive && !readwrite) { 1900 dev_err(&adapter->ccw_device->dev, 1901 "Exclusive read-only access not " 1902 "supported (unit 0x%016Lx, " 1903 "port 0x%016Lx)\n", 1904 (unsigned long long)unit->fcp_lun, 1905 (unsigned long long)unit->port->wwpn); 1906 zfcp_erp_unit_failed(unit, "fsouh_5", req); 1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1908 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req); 1909 } else if (!exclusive && readwrite) { 1910 dev_err(&adapter->ccw_device->dev, 1911 "Shared read-write access not " 1912 "supported (unit 0x%016Lx, port " 1913 "0x%016Lx)\n", 1914 (unsigned long long)unit->fcp_lun, 1915 (unsigned long long)unit->port->wwpn); 1916 zfcp_erp_unit_failed(unit, "fsouh_7", req); 1917 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1918 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req); 1919 } 1920 } 1921 break; 1922 } 1923 } 1924 1925 /** 1926 * zfcp_fsf_open_unit - open unit 1927 * @erp_action: pointer to struct zfcp_erp_action 1928 * Returns: 0 on success, error otherwise 1929 */ 1930 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 1931 { 1932 struct qdio_buffer_element *sbale; 1933 struct zfcp_adapter *adapter = erp_action->adapter; 1934 struct zfcp_fsf_req *req; 1935 int retval = -EIO; 1936 1937 spin_lock_bh(&adapter->req_q_lock); 1938 if (zfcp_fsf_req_sbal_get(adapter)) 1939 goto out; 1940 1941 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN, 1942 ZFCP_REQ_AUTO_CLEANUP, 1943 adapter->pool.fsf_req_erp); 1944 if (IS_ERR(req)) { 1945 retval = PTR_ERR(req); 1946 goto out; 1947 } 1948 1949 sbale = zfcp_qdio_sbale_req(req); 1950 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1951 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1952 1953 req->qtcb->header.port_handle = erp_action->port->handle; 1954 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; 1955 req->handler = zfcp_fsf_open_unit_handler; 1956 req->data = erp_action->unit; 1957 req->erp_action = erp_action; 1958 erp_action->fsf_req = req; 1959 1960 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) 1961 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; 1962 1963 zfcp_fsf_start_erp_timer(req); 1964 retval = zfcp_fsf_req_send(req); 1965 if (retval) { 1966 zfcp_fsf_req_free(req); 1967 erp_action->fsf_req = NULL; 1968 } 1969 out: 1970 spin_unlock_bh(&adapter->req_q_lock); 1971 return retval; 1972 } 1973 1974 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req) 1975 { 1976 struct zfcp_unit *unit = req->data; 1977 1978 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1979 return; 1980 1981 switch (req->qtcb->header.fsf_status) { 1982 case FSF_PORT_HANDLE_NOT_VALID: 1983 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req); 1984 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1985 break; 1986 case FSF_LUN_HANDLE_NOT_VALID: 1987 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req); 1988 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1989 break; 1990 case FSF_PORT_BOXED: 1991 zfcp_erp_port_boxed(unit->port, "fscuh_3", req); 1992 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 1993 ZFCP_STATUS_FSFREQ_RETRY; 1994 break; 1995 case FSF_ADAPTER_STATUS_AVAILABLE: 1996 switch (req->qtcb->header.fsf_status_qual.word[0]) { 1997 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1998 zfcp_test_link(unit->port); 1999 /* fall through */ 2000 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2001 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2002 break; 2003 } 2004 break; 2005 case FSF_GOOD: 2006 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 2007 break; 2008 } 2009 } 2010 2011 /** 2012 * zfcp_fsf_close_unit - close zfcp unit 2013 * @erp_action: pointer to struct zfcp_unit 2014 * Returns: 0 on success, error otherwise 2015 */ 2016 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 2017 { 2018 struct qdio_buffer_element *sbale; 2019 struct zfcp_adapter *adapter = erp_action->adapter; 2020 struct zfcp_fsf_req *req; 2021 int retval = -EIO; 2022 2023 spin_lock_bh(&adapter->req_q_lock); 2024 if (zfcp_fsf_req_sbal_get(adapter)) 2025 goto out; 2026 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN, 2027 ZFCP_REQ_AUTO_CLEANUP, 2028 adapter->pool.fsf_req_erp); 2029 if (IS_ERR(req)) { 2030 retval = PTR_ERR(req); 2031 goto out; 2032 } 2033 2034 sbale = zfcp_qdio_sbale_req(req); 2035 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2036 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2037 2038 req->qtcb->header.port_handle = erp_action->port->handle; 2039 req->qtcb->header.lun_handle = erp_action->unit->handle; 2040 req->handler = zfcp_fsf_close_unit_handler; 2041 req->data = erp_action->unit; 2042 req->erp_action = erp_action; 2043 erp_action->fsf_req = req; 2044 2045 zfcp_fsf_start_erp_timer(req); 2046 retval = zfcp_fsf_req_send(req); 2047 if (retval) { 2048 zfcp_fsf_req_free(req); 2049 erp_action->fsf_req = NULL; 2050 } 2051 out: 2052 spin_unlock_bh(&adapter->req_q_lock); 2053 return retval; 2054 } 2055 2056 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat) 2057 { 2058 lat_rec->sum += lat; 2059 lat_rec->min = min(lat_rec->min, lat); 2060 lat_rec->max = max(lat_rec->max, lat); 2061 } 2062 2063 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req) 2064 { 2065 struct fsf_qual_latency_info *lat_inf; 2066 struct latency_cont *lat; 2067 struct zfcp_unit *unit = req->unit; 2068 2069 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info; 2070 2071 switch (req->qtcb->bottom.io.data_direction) { 2072 case FSF_DATADIR_READ: 2073 lat = &unit->latencies.read; 2074 break; 2075 case FSF_DATADIR_WRITE: 2076 lat = &unit->latencies.write; 2077 break; 2078 case FSF_DATADIR_CMND: 2079 lat = &unit->latencies.cmd; 2080 break; 2081 default: 2082 return; 2083 } 2084 2085 spin_lock(&unit->latencies.lock); 2086 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat); 2087 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat); 2088 lat->counter++; 2089 spin_unlock(&unit->latencies.lock); 2090 } 2091 2092 #ifdef CONFIG_BLK_DEV_IO_TRACE 2093 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req) 2094 { 2095 struct fsf_qual_latency_info *lat_inf; 2096 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data; 2097 struct request *req = scsi_cmnd->request; 2098 struct zfcp_blk_drv_data trace; 2099 int ticks = fsf_req->adapter->timer_ticks; 2100 2101 trace.flags = 0; 2102 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC; 2103 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) { 2104 trace.flags |= ZFCP_BLK_LAT_VALID; 2105 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info; 2106 trace.channel_lat = lat_inf->channel_lat * ticks; 2107 trace.fabric_lat = lat_inf->fabric_lat * ticks; 2108 } 2109 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2110 trace.flags |= ZFCP_BLK_REQ_ERROR; 2111 trace.inb_usage = fsf_req->qdio_inb_usage; 2112 trace.outb_usage = fsf_req->qdio_outb_usage; 2113 2114 blk_add_driver_data(req->q, req, &trace, sizeof(trace)); 2115 } 2116 #else 2117 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req) 2118 { 2119 } 2120 #endif 2121 2122 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req) 2123 { 2124 struct scsi_cmnd *scpnt; 2125 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 2126 &(req->qtcb->bottom.io.fcp_rsp); 2127 u32 sns_len; 2128 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; 2129 unsigned long flags; 2130 2131 read_lock_irqsave(&req->adapter->abort_lock, flags); 2132 2133 scpnt = req->data; 2134 if (unlikely(!scpnt)) { 2135 read_unlock_irqrestore(&req->adapter->abort_lock, flags); 2136 return; 2137 } 2138 2139 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { 2140 set_host_byte(scpnt, DID_SOFT_ERROR); 2141 goto skip_fsfstatus; 2142 } 2143 2144 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 2145 set_host_byte(scpnt, DID_ERROR); 2146 goto skip_fsfstatus; 2147 } 2148 2149 set_msg_byte(scpnt, COMMAND_COMPLETE); 2150 2151 scpnt->result |= fcp_rsp_iu->scsi_status; 2152 2153 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) 2154 zfcp_fsf_req_latency(req); 2155 2156 zfcp_fsf_trace_latency(req); 2157 2158 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { 2159 if (fcp_rsp_info[3] == RSP_CODE_GOOD) 2160 set_host_byte(scpnt, DID_OK); 2161 else { 2162 set_host_byte(scpnt, DID_ERROR); 2163 goto skip_fsfstatus; 2164 } 2165 } 2166 2167 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { 2168 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) + 2169 fcp_rsp_iu->fcp_rsp_len; 2170 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); 2171 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); 2172 2173 memcpy(scpnt->sense_buffer, 2174 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); 2175 } 2176 2177 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { 2178 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid); 2179 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) < 2180 scpnt->underflow) 2181 set_host_byte(scpnt, DID_ERROR); 2182 } 2183 skip_fsfstatus: 2184 if (scpnt->result != 0) 2185 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req); 2186 else if (scpnt->retries > 0) 2187 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req); 2188 else 2189 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req); 2190 2191 scpnt->host_scribble = NULL; 2192 (scpnt->scsi_done) (scpnt); 2193 /* 2194 * We must hold this lock until scsi_done has been called. 2195 * Otherwise we may call scsi_done after abort regarding this 2196 * command has completed. 2197 * Note: scsi_done must not block! 2198 */ 2199 read_unlock_irqrestore(&req->adapter->abort_lock, flags); 2200 } 2201 2202 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req) 2203 { 2204 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 2205 &(req->qtcb->bottom.io.fcp_rsp); 2206 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; 2207 2208 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) || 2209 (req->status & ZFCP_STATUS_FSFREQ_ERROR)) 2210 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 2211 } 2212 2213 2214 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req) 2215 { 2216 struct zfcp_unit *unit; 2217 struct fsf_qtcb_header *header = &req->qtcb->header; 2218 2219 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) 2220 unit = req->data; 2221 else 2222 unit = req->unit; 2223 2224 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) 2225 goto skip_fsfstatus; 2226 2227 switch (header->fsf_status) { 2228 case FSF_HANDLE_MISMATCH: 2229 case FSF_PORT_HANDLE_NOT_VALID: 2230 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req); 2231 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2232 break; 2233 case FSF_FCPLUN_NOT_VALID: 2234 case FSF_LUN_HANDLE_NOT_VALID: 2235 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req); 2236 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2237 break; 2238 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 2239 zfcp_fsf_class_not_supp(req); 2240 break; 2241 case FSF_ACCESS_DENIED: 2242 zfcp_fsf_access_denied_unit(req, unit); 2243 break; 2244 case FSF_DIRECTION_INDICATOR_NOT_VALID: 2245 dev_err(&req->adapter->ccw_device->dev, 2246 "Incorrect direction %d, unit 0x%016Lx on port " 2247 "0x%016Lx closed\n", 2248 req->qtcb->bottom.io.data_direction, 2249 (unsigned long long)unit->fcp_lun, 2250 (unsigned long long)unit->port->wwpn); 2251 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3", 2252 req); 2253 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2254 break; 2255 case FSF_CMND_LENGTH_NOT_VALID: 2256 dev_err(&req->adapter->ccw_device->dev, 2257 "Incorrect CDB length %d, unit 0x%016Lx on " 2258 "port 0x%016Lx closed\n", 2259 req->qtcb->bottom.io.fcp_cmnd_length, 2260 (unsigned long long)unit->fcp_lun, 2261 (unsigned long long)unit->port->wwpn); 2262 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4", 2263 req); 2264 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2265 break; 2266 case FSF_PORT_BOXED: 2267 zfcp_erp_port_boxed(unit->port, "fssfch5", req); 2268 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2269 ZFCP_STATUS_FSFREQ_RETRY; 2270 break; 2271 case FSF_LUN_BOXED: 2272 zfcp_erp_unit_boxed(unit, "fssfch6", req); 2273 req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2274 ZFCP_STATUS_FSFREQ_RETRY; 2275 break; 2276 case FSF_ADAPTER_STATUS_AVAILABLE: 2277 if (header->fsf_status_qual.word[0] == 2278 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE) 2279 zfcp_test_link(unit->port); 2280 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2281 break; 2282 } 2283 skip_fsfstatus: 2284 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) 2285 zfcp_fsf_send_fcp_ctm_handler(req); 2286 else { 2287 zfcp_fsf_send_fcp_command_task_handler(req); 2288 req->unit = NULL; 2289 zfcp_unit_put(unit); 2290 } 2291 } 2292 2293 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl) 2294 { 2295 u32 *fcp_dl_ptr; 2296 2297 /* 2298 * fcp_dl_addr = start address of fcp_cmnd structure + 2299 * size of fixed part + size of dynamically sized add_dcp_cdb field 2300 * SEE FCP-2 documentation 2301 */ 2302 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] + 2303 (fcp_cmd->add_fcp_cdb_length << 2)); 2304 *fcp_dl_ptr = fcp_dl; 2305 } 2306 2307 /** 2308 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) 2309 * @unit: unit where command is sent to 2310 * @scsi_cmnd: scsi command to be sent 2311 */ 2312 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit, 2313 struct scsi_cmnd *scsi_cmnd) 2314 { 2315 struct zfcp_fsf_req *req; 2316 struct fcp_cmnd_iu *fcp_cmnd_iu; 2317 unsigned int sbtype; 2318 int real_bytes, retval = -EIO; 2319 struct zfcp_adapter *adapter = unit->port->adapter; 2320 2321 if (unlikely(!(atomic_read(&unit->status) & 2322 ZFCP_STATUS_COMMON_UNBLOCKED))) 2323 return -EBUSY; 2324 2325 spin_lock(&adapter->req_q_lock); 2326 if (atomic_read(&adapter->req_q.count) <= 0) { 2327 atomic_inc(&adapter->qdio_outb_full); 2328 goto out; 2329 } 2330 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 2331 ZFCP_REQ_AUTO_CLEANUP, 2332 adapter->pool.fsf_req_scsi); 2333 if (IS_ERR(req)) { 2334 retval = PTR_ERR(req); 2335 goto out; 2336 } 2337 2338 zfcp_unit_get(unit); 2339 req->unit = unit; 2340 req->data = scsi_cmnd; 2341 req->handler = zfcp_fsf_send_fcp_command_handler; 2342 req->qtcb->header.lun_handle = unit->handle; 2343 req->qtcb->header.port_handle = unit->port->handle; 2344 req->qtcb->bottom.io.service_class = FSF_CLASS_3; 2345 2346 scsi_cmnd->host_scribble = (unsigned char *) req->req_id; 2347 2348 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd); 2349 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 2350 /* 2351 * set depending on data direction: 2352 * data direction bits in SBALE (SB Type) 2353 * data direction bits in QTCB 2354 * data direction bits in FCP_CMND IU 2355 */ 2356 switch (scsi_cmnd->sc_data_direction) { 2357 case DMA_NONE: 2358 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 2359 sbtype = SBAL_FLAGS0_TYPE_READ; 2360 break; 2361 case DMA_FROM_DEVICE: 2362 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; 2363 sbtype = SBAL_FLAGS0_TYPE_READ; 2364 fcp_cmnd_iu->rddata = 1; 2365 break; 2366 case DMA_TO_DEVICE: 2367 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; 2368 sbtype = SBAL_FLAGS0_TYPE_WRITE; 2369 fcp_cmnd_iu->wddata = 1; 2370 break; 2371 case DMA_BIDIRECTIONAL: 2372 default: 2373 retval = -EIO; 2374 goto failed_scsi_cmnd; 2375 } 2376 2377 if (likely((scsi_cmnd->device->simple_tags) || 2378 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) && 2379 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED)))) 2380 fcp_cmnd_iu->task_attribute = SIMPLE_Q; 2381 else 2382 fcp_cmnd_iu->task_attribute = UNTAGGED; 2383 2384 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) 2385 fcp_cmnd_iu->add_fcp_cdb_length = 2386 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; 2387 2388 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 2389 2390 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) + 2391 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32); 2392 2393 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype, 2394 scsi_sglist(scsi_cmnd), 2395 FSF_MAX_SBALS_PER_REQ); 2396 if (unlikely(real_bytes < 0)) { 2397 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ) 2398 retval = -EIO; 2399 else { 2400 dev_err(&adapter->ccw_device->dev, 2401 "Oversize data package, unit 0x%016Lx " 2402 "on port 0x%016Lx closed\n", 2403 (unsigned long long)unit->fcp_lun, 2404 (unsigned long long)unit->port->wwpn); 2405 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req); 2406 retval = -EINVAL; 2407 } 2408 goto failed_scsi_cmnd; 2409 } 2410 2411 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); 2412 2413 retval = zfcp_fsf_req_send(req); 2414 if (unlikely(retval)) 2415 goto failed_scsi_cmnd; 2416 2417 goto out; 2418 2419 failed_scsi_cmnd: 2420 zfcp_unit_put(unit); 2421 zfcp_fsf_req_free(req); 2422 scsi_cmnd->host_scribble = NULL; 2423 out: 2424 spin_unlock(&adapter->req_q_lock); 2425 return retval; 2426 } 2427 2428 /** 2429 * zfcp_fsf_send_fcp_ctm - send SCSI task management command 2430 * @unit: pointer to struct zfcp_unit 2431 * @tm_flags: unsigned byte for task management flags 2432 * Returns: on success pointer to struct fsf_req, NULL otherwise 2433 */ 2434 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags) 2435 { 2436 struct qdio_buffer_element *sbale; 2437 struct zfcp_fsf_req *req = NULL; 2438 struct fcp_cmnd_iu *fcp_cmnd_iu; 2439 struct zfcp_adapter *adapter = unit->port->adapter; 2440 2441 if (unlikely(!(atomic_read(&unit->status) & 2442 ZFCP_STATUS_COMMON_UNBLOCKED))) 2443 return NULL; 2444 2445 spin_lock_bh(&adapter->req_q_lock); 2446 if (zfcp_fsf_req_sbal_get(adapter)) 2447 goto out; 2448 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0, 2449 adapter->pool.fsf_req_scsi); 2450 if (IS_ERR(req)) { 2451 req = NULL; 2452 goto out; 2453 } 2454 2455 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; 2456 req->data = unit; 2457 req->handler = zfcp_fsf_send_fcp_command_handler; 2458 req->qtcb->header.lun_handle = unit->handle; 2459 req->qtcb->header.port_handle = unit->port->handle; 2460 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 2461 req->qtcb->bottom.io.service_class = FSF_CLASS_3; 2462 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) + 2463 sizeof(u32); 2464 2465 sbale = zfcp_qdio_sbale_req(req); 2466 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; 2467 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2468 2469 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd; 2470 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 2471 fcp_cmnd_iu->task_management_flags = tm_flags; 2472 2473 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); 2474 if (!zfcp_fsf_req_send(req)) 2475 goto out; 2476 2477 zfcp_fsf_req_free(req); 2478 req = NULL; 2479 out: 2480 spin_unlock_bh(&adapter->req_q_lock); 2481 return req; 2482 } 2483 2484 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req) 2485 { 2486 } 2487 2488 /** 2489 * zfcp_fsf_control_file - control file upload/download 2490 * @adapter: pointer to struct zfcp_adapter 2491 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc 2492 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise 2493 */ 2494 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, 2495 struct zfcp_fsf_cfdc *fsf_cfdc) 2496 { 2497 struct qdio_buffer_element *sbale; 2498 struct zfcp_fsf_req *req = NULL; 2499 struct fsf_qtcb_bottom_support *bottom; 2500 int direction, retval = -EIO, bytes; 2501 2502 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) 2503 return ERR_PTR(-EOPNOTSUPP); 2504 2505 switch (fsf_cfdc->command) { 2506 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 2507 direction = SBAL_FLAGS0_TYPE_WRITE; 2508 break; 2509 case FSF_QTCB_UPLOAD_CONTROL_FILE: 2510 direction = SBAL_FLAGS0_TYPE_READ; 2511 break; 2512 default: 2513 return ERR_PTR(-EINVAL); 2514 } 2515 2516 spin_lock_bh(&adapter->req_q_lock); 2517 if (zfcp_fsf_req_sbal_get(adapter)) 2518 goto out; 2519 2520 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL); 2521 if (IS_ERR(req)) { 2522 retval = -EPERM; 2523 goto out; 2524 } 2525 2526 req->handler = zfcp_fsf_control_file_handler; 2527 2528 sbale = zfcp_qdio_sbale_req(req); 2529 sbale[0].flags |= direction; 2530 2531 bottom = &req->qtcb->bottom.support; 2532 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; 2533 bottom->option = fsf_cfdc->option; 2534 2535 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg, 2536 FSF_MAX_SBALS_PER_REQ); 2537 if (bytes != ZFCP_CFDC_MAX_SIZE) { 2538 retval = -ENOMEM; 2539 zfcp_fsf_req_free(req); 2540 goto out; 2541 } 2542 2543 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 2544 retval = zfcp_fsf_req_send(req); 2545 out: 2546 spin_unlock_bh(&adapter->req_q_lock); 2547 2548 if (!retval) { 2549 wait_event(req->completion_wq, 2550 req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 2551 return req; 2552 } 2553 return ERR_PTR(retval); 2554 } 2555