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