1 /* 2 * zfcp device driver 3 * 4 * Implementation of FSF commands. 5 * 6 * Copyright IBM Corp. 2002, 2015 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/blktrace_api.h> 13 #include <linux/slab.h> 14 #include <scsi/fc/fc_els.h> 15 #include "zfcp_ext.h" 16 #include "zfcp_fc.h" 17 #include "zfcp_dbf.h" 18 #include "zfcp_qdio.h" 19 #include "zfcp_reqlist.h" 20 21 struct kmem_cache *zfcp_fsf_qtcb_cache; 22 23 static void zfcp_fsf_request_timeout_handler(unsigned long data) 24 { 25 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; 26 zfcp_qdio_siosl(adapter); 27 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 28 "fsrth_1"); 29 } 30 31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, 32 unsigned long timeout) 33 { 34 fsf_req->timer.function = zfcp_fsf_request_timeout_handler; 35 fsf_req->timer.data = (unsigned long) fsf_req->adapter; 36 fsf_req->timer.expires = jiffies + timeout; 37 add_timer(&fsf_req->timer); 38 } 39 40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) 41 { 42 BUG_ON(!fsf_req->erp_action); 43 fsf_req->timer.function = zfcp_erp_timeout_handler; 44 fsf_req->timer.data = (unsigned long) fsf_req->erp_action; 45 fsf_req->timer.expires = jiffies + 30 * HZ; 46 add_timer(&fsf_req->timer); 47 } 48 49 /* association between FSF command and FSF QTCB type */ 50 static u32 fsf_qtcb_type[] = { 51 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 52 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 53 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 54 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 55 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 56 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 57 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 58 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 59 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 60 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 61 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 62 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 63 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 64 }; 65 66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) 67 { 68 dev_err(&req->adapter->ccw_device->dev, "FCP device not " 69 "operational because of an unsupported FC class\n"); 70 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1"); 71 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 72 } 73 74 /** 75 * zfcp_fsf_req_free - free memory used by fsf request 76 * @fsf_req: pointer to struct zfcp_fsf_req 77 */ 78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req) 79 { 80 if (likely(req->pool)) { 81 if (likely(req->qtcb)) 82 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool); 83 mempool_free(req, req->pool); 84 return; 85 } 86 87 if (likely(req->qtcb)) 88 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb); 89 kfree(req); 90 } 91 92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) 93 { 94 unsigned long flags; 95 struct fsf_status_read_buffer *sr_buf = req->data; 96 struct zfcp_adapter *adapter = req->adapter; 97 struct zfcp_port *port; 98 int d_id = ntoh24(sr_buf->d_id); 99 100 read_lock_irqsave(&adapter->port_list_lock, flags); 101 list_for_each_entry(port, &adapter->port_list, list) 102 if (port->d_id == d_id) { 103 zfcp_erp_port_reopen(port, 0, "fssrpc1"); 104 break; 105 } 106 read_unlock_irqrestore(&adapter->port_list_lock, flags); 107 } 108 109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, 110 struct fsf_link_down_info *link_down) 111 { 112 struct zfcp_adapter *adapter = req->adapter; 113 114 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 115 return; 116 117 atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); 118 119 zfcp_scsi_schedule_rports_block(adapter); 120 121 if (!link_down) 122 goto out; 123 124 switch (link_down->error_code) { 125 case FSF_PSQ_LINK_NO_LIGHT: 126 dev_warn(&req->adapter->ccw_device->dev, 127 "There is no light signal from the local " 128 "fibre channel cable\n"); 129 break; 130 case FSF_PSQ_LINK_WRAP_PLUG: 131 dev_warn(&req->adapter->ccw_device->dev, 132 "There is a wrap plug instead of a fibre " 133 "channel cable\n"); 134 break; 135 case FSF_PSQ_LINK_NO_FCP: 136 dev_warn(&req->adapter->ccw_device->dev, 137 "The adjacent fibre channel node does not " 138 "support FCP\n"); 139 break; 140 case FSF_PSQ_LINK_FIRMWARE_UPDATE: 141 dev_warn(&req->adapter->ccw_device->dev, 142 "The FCP device is suspended because of a " 143 "firmware update\n"); 144 break; 145 case FSF_PSQ_LINK_INVALID_WWPN: 146 dev_warn(&req->adapter->ccw_device->dev, 147 "The FCP device detected a WWPN that is " 148 "duplicate or not valid\n"); 149 break; 150 case FSF_PSQ_LINK_NO_NPIV_SUPPORT: 151 dev_warn(&req->adapter->ccw_device->dev, 152 "The fibre channel fabric does not support NPIV\n"); 153 break; 154 case FSF_PSQ_LINK_NO_FCP_RESOURCES: 155 dev_warn(&req->adapter->ccw_device->dev, 156 "The FCP adapter cannot support more NPIV ports\n"); 157 break; 158 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: 159 dev_warn(&req->adapter->ccw_device->dev, 160 "The adjacent switch cannot support " 161 "more NPIV ports\n"); 162 break; 163 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: 164 dev_warn(&req->adapter->ccw_device->dev, 165 "The FCP adapter could not log in to the " 166 "fibre channel fabric\n"); 167 break; 168 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: 169 dev_warn(&req->adapter->ccw_device->dev, 170 "The WWPN assignment file on the FCP adapter " 171 "has been damaged\n"); 172 break; 173 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: 174 dev_warn(&req->adapter->ccw_device->dev, 175 "The mode table on the FCP adapter " 176 "has been damaged\n"); 177 break; 178 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: 179 dev_warn(&req->adapter->ccw_device->dev, 180 "All NPIV ports on the FCP adapter have " 181 "been assigned\n"); 182 break; 183 default: 184 dev_warn(&req->adapter->ccw_device->dev, 185 "The link between the FCP adapter and " 186 "the FC fabric is down\n"); 187 } 188 out: 189 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED); 190 } 191 192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) 193 { 194 struct fsf_status_read_buffer *sr_buf = req->data; 195 struct fsf_link_down_info *ldi = 196 (struct fsf_link_down_info *) &sr_buf->payload; 197 198 switch (sr_buf->status_subtype) { 199 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: 200 zfcp_fsf_link_down_info_eval(req, ldi); 201 break; 202 case FSF_STATUS_READ_SUB_FDISC_FAILED: 203 zfcp_fsf_link_down_info_eval(req, ldi); 204 break; 205 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: 206 zfcp_fsf_link_down_info_eval(req, NULL); 207 } 208 } 209 210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) 211 { 212 struct zfcp_adapter *adapter = req->adapter; 213 struct fsf_status_read_buffer *sr_buf = req->data; 214 215 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 216 zfcp_dbf_hba_fsf_uss("fssrh_1", req); 217 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); 218 zfcp_fsf_req_free(req); 219 return; 220 } 221 222 zfcp_dbf_hba_fsf_uss("fssrh_4", req); 223 224 switch (sr_buf->status_type) { 225 case FSF_STATUS_READ_PORT_CLOSED: 226 zfcp_fsf_status_read_port_closed(req); 227 break; 228 case FSF_STATUS_READ_INCOMING_ELS: 229 zfcp_fc_incoming_els(req); 230 break; 231 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 232 break; 233 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 234 dev_warn(&adapter->ccw_device->dev, 235 "The error threshold for checksum statistics " 236 "has been exceeded\n"); 237 zfcp_dbf_hba_bit_err("fssrh_3", req); 238 break; 239 case FSF_STATUS_READ_LINK_DOWN: 240 zfcp_fsf_status_read_link_down(req); 241 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0); 242 break; 243 case FSF_STATUS_READ_LINK_UP: 244 dev_info(&adapter->ccw_device->dev, 245 "The local link has been restored\n"); 246 /* All ports should be marked as ready to run again */ 247 zfcp_erp_set_adapter_status(adapter, 248 ZFCP_STATUS_COMMON_RUNNING); 249 zfcp_erp_adapter_reopen(adapter, 250 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 251 ZFCP_STATUS_COMMON_ERP_FAILED, 252 "fssrh_2"); 253 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0); 254 255 break; 256 case FSF_STATUS_READ_NOTIFICATION_LOST: 257 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) 258 zfcp_fc_conditional_port_scan(adapter); 259 break; 260 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: 261 adapter->adapter_features = sr_buf->payload.word[0]; 262 break; 263 } 264 265 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); 266 zfcp_fsf_req_free(req); 267 268 atomic_inc(&adapter->stat_miss); 269 queue_work(adapter->work_queue, &adapter->stat_work); 270 } 271 272 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) 273 { 274 switch (req->qtcb->header.fsf_status_qual.word[0]) { 275 case FSF_SQ_FCP_RSP_AVAILABLE: 276 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 277 case FSF_SQ_NO_RETRY_POSSIBLE: 278 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 279 return; 280 case FSF_SQ_COMMAND_ABORTED: 281 break; 282 case FSF_SQ_NO_RECOM: 283 dev_err(&req->adapter->ccw_device->dev, 284 "The FCP adapter reported a problem " 285 "that cannot be recovered\n"); 286 zfcp_qdio_siosl(req->adapter); 287 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1"); 288 break; 289 } 290 /* all non-return stats set FSFREQ_ERROR*/ 291 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 292 } 293 294 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) 295 { 296 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) 297 return; 298 299 switch (req->qtcb->header.fsf_status) { 300 case FSF_UNKNOWN_COMMAND: 301 dev_err(&req->adapter->ccw_device->dev, 302 "The FCP adapter does not recognize the command 0x%x\n", 303 req->qtcb->header.fsf_command); 304 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1"); 305 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 306 break; 307 case FSF_ADAPTER_STATUS_AVAILABLE: 308 zfcp_fsf_fsfstatus_qual_eval(req); 309 break; 310 } 311 } 312 313 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) 314 { 315 struct zfcp_adapter *adapter = req->adapter; 316 struct fsf_qtcb *qtcb = req->qtcb; 317 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; 318 319 zfcp_dbf_hba_fsf_response(req); 320 321 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 322 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 323 return; 324 } 325 326 switch (qtcb->prefix.prot_status) { 327 case FSF_PROT_GOOD: 328 case FSF_PROT_FSF_STATUS_PRESENTED: 329 return; 330 case FSF_PROT_QTCB_VERSION_ERROR: 331 dev_err(&adapter->ccw_device->dev, 332 "QTCB version 0x%x not supported by FCP adapter " 333 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION, 334 psq->word[0], psq->word[1]); 335 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1"); 336 break; 337 case FSF_PROT_ERROR_STATE: 338 case FSF_PROT_SEQ_NUMB_ERROR: 339 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2"); 340 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 341 break; 342 case FSF_PROT_UNSUPP_QTCB_TYPE: 343 dev_err(&adapter->ccw_device->dev, 344 "The QTCB type is not supported by the FCP adapter\n"); 345 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3"); 346 break; 347 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 348 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 349 &adapter->status); 350 break; 351 case FSF_PROT_DUPLICATE_REQUEST_ID: 352 dev_err(&adapter->ccw_device->dev, 353 "0x%Lx is an ambiguous request identifier\n", 354 (unsigned long long)qtcb->bottom.support.req_handle); 355 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4"); 356 break; 357 case FSF_PROT_LINK_DOWN: 358 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info); 359 /* go through reopen to flush pending requests */ 360 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6"); 361 break; 362 case FSF_PROT_REEST_QUEUE: 363 /* All ports should be marked as ready to run again */ 364 zfcp_erp_set_adapter_status(adapter, 365 ZFCP_STATUS_COMMON_RUNNING); 366 zfcp_erp_adapter_reopen(adapter, 367 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 368 ZFCP_STATUS_COMMON_ERP_FAILED, 369 "fspse_8"); 370 break; 371 default: 372 dev_err(&adapter->ccw_device->dev, 373 "0x%x is not a valid transfer protocol status\n", 374 qtcb->prefix.prot_status); 375 zfcp_qdio_siosl(adapter); 376 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9"); 377 } 378 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 379 } 380 381 /** 382 * zfcp_fsf_req_complete - process completion of a FSF request 383 * @fsf_req: The FSF request that has been completed. 384 * 385 * When a request has been completed either from the FCP adapter, 386 * or it has been dismissed due to a queue shutdown, this function 387 * is called to process the completion status and trigger further 388 * events related to the FSF request. 389 */ 390 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req) 391 { 392 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { 393 zfcp_fsf_status_read_handler(req); 394 return; 395 } 396 397 del_timer(&req->timer); 398 zfcp_fsf_protstatus_eval(req); 399 zfcp_fsf_fsfstatus_eval(req); 400 req->handler(req); 401 402 if (req->erp_action) 403 zfcp_erp_notify(req->erp_action, 0); 404 405 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 406 zfcp_fsf_req_free(req); 407 else 408 complete(&req->completion); 409 } 410 411 /** 412 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests 413 * @adapter: pointer to struct zfcp_adapter 414 * 415 * Never ever call this without shutting down the adapter first. 416 * Otherwise the adapter would continue using and corrupting s390 storage. 417 * Included BUG_ON() call to ensure this is done. 418 * ERP is supposed to be the only user of this function. 419 */ 420 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 421 { 422 struct zfcp_fsf_req *req, *tmp; 423 LIST_HEAD(remove_queue); 424 425 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP); 426 zfcp_reqlist_move(adapter->req_list, &remove_queue); 427 428 list_for_each_entry_safe(req, tmp, &remove_queue, list) { 429 list_del(&req->list); 430 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 431 zfcp_fsf_req_complete(req); 432 } 433 } 434 435 #define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0) 436 #define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1) 437 #define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2) 438 #define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3) 439 #define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4) 440 #define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5) 441 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15) 442 443 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed) 444 { 445 u32 fdmi_speed = 0; 446 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT) 447 fdmi_speed |= FC_PORTSPEED_1GBIT; 448 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT) 449 fdmi_speed |= FC_PORTSPEED_2GBIT; 450 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT) 451 fdmi_speed |= FC_PORTSPEED_4GBIT; 452 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT) 453 fdmi_speed |= FC_PORTSPEED_10GBIT; 454 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT) 455 fdmi_speed |= FC_PORTSPEED_8GBIT; 456 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT) 457 fdmi_speed |= FC_PORTSPEED_16GBIT; 458 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED) 459 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED; 460 return fdmi_speed; 461 } 462 463 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) 464 { 465 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config; 466 struct zfcp_adapter *adapter = req->adapter; 467 struct Scsi_Host *shost = adapter->scsi_host; 468 struct fc_els_flogi *nsp, *plogi; 469 470 /* adjust pointers for missing command code */ 471 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param 472 - sizeof(u32)); 473 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload 474 - sizeof(u32)); 475 476 if (req->data) 477 memcpy(req->data, bottom, sizeof(*bottom)); 478 479 fc_host_port_name(shost) = nsp->fl_wwpn; 480 fc_host_node_name(shost) = nsp->fl_wwnn; 481 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; 482 483 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK; 484 adapter->stat_read_buf_num = max(bottom->status_read_buf_num, 485 (u16)FSF_STATUS_READS_RECOM); 486 487 if (fc_host_permanent_port_name(shost) == -1) 488 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 489 490 zfcp_scsi_set_prot(adapter); 491 492 /* no error return above here, otherwise must fix call chains */ 493 /* do not evaluate invalid fields */ 494 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE) 495 return 0; 496 497 fc_host_port_id(shost) = ntoh24(bottom->s_id); 498 fc_host_speed(shost) = 499 zfcp_fsf_convert_portspeed(bottom->fc_link_speed); 500 501 adapter->hydra_version = bottom->adapter_type; 502 503 switch (bottom->fc_topology) { 504 case FSF_TOPO_P2P: 505 adapter->peer_d_id = ntoh24(bottom->peer_d_id); 506 adapter->peer_wwpn = plogi->fl_wwpn; 507 adapter->peer_wwnn = plogi->fl_wwnn; 508 fc_host_port_type(shost) = FC_PORTTYPE_PTP; 509 break; 510 case FSF_TOPO_FABRIC: 511 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE) 512 fc_host_port_type(shost) = FC_PORTTYPE_NPIV; 513 else 514 fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 515 break; 516 case FSF_TOPO_AL: 517 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; 518 /* fall through */ 519 default: 520 dev_err(&adapter->ccw_device->dev, 521 "Unknown or unsupported arbitrated loop " 522 "fibre channel topology detected\n"); 523 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1"); 524 return -EIO; 525 } 526 527 return 0; 528 } 529 530 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) 531 { 532 struct zfcp_adapter *adapter = req->adapter; 533 struct fsf_qtcb *qtcb = req->qtcb; 534 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config; 535 struct Scsi_Host *shost = adapter->scsi_host; 536 537 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 538 return; 539 540 adapter->fsf_lic_version = bottom->lic_version; 541 adapter->adapter_features = bottom->adapter_features; 542 adapter->connection_features = bottom->connection_features; 543 adapter->peer_wwpn = 0; 544 adapter->peer_wwnn = 0; 545 adapter->peer_d_id = 0; 546 547 switch (qtcb->header.fsf_status) { 548 case FSF_GOOD: 549 if (zfcp_fsf_exchange_config_evaluate(req)) 550 return; 551 552 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 553 dev_err(&adapter->ccw_device->dev, 554 "FCP adapter maximum QTCB size (%d bytes) " 555 "is too small\n", 556 bottom->max_qtcb_size); 557 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1"); 558 return; 559 } 560 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 561 &adapter->status); 562 break; 563 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 564 fc_host_node_name(shost) = 0; 565 fc_host_port_name(shost) = 0; 566 fc_host_port_id(shost) = 0; 567 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 568 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 569 adapter->hydra_version = 0; 570 571 /* avoids adapter shutdown to be able to recognize 572 * events such as LINK UP */ 573 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 574 &adapter->status); 575 zfcp_fsf_link_down_info_eval(req, 576 &qtcb->header.fsf_status_qual.link_down_info); 577 if (zfcp_fsf_exchange_config_evaluate(req)) 578 return; 579 break; 580 default: 581 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3"); 582 return; 583 } 584 585 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { 586 adapter->hardware_version = bottom->hardware_version; 587 memcpy(fc_host_serial_number(shost), bottom->serial_number, 588 min(FC_SERIAL_NUMBER_SIZE, 17)); 589 EBCASC(fc_host_serial_number(shost), 590 min(FC_SERIAL_NUMBER_SIZE, 17)); 591 } 592 593 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) { 594 dev_err(&adapter->ccw_device->dev, 595 "The FCP adapter only supports newer " 596 "control block versions\n"); 597 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4"); 598 return; 599 } 600 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) { 601 dev_err(&adapter->ccw_device->dev, 602 "The FCP adapter only supports older " 603 "control block versions\n"); 604 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5"); 605 } 606 } 607 608 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) 609 { 610 struct zfcp_adapter *adapter = req->adapter; 611 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port; 612 struct Scsi_Host *shost = adapter->scsi_host; 613 614 if (req->data) 615 memcpy(req->data, bottom, sizeof(*bottom)); 616 617 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) { 618 fc_host_permanent_port_name(shost) = bottom->wwpn; 619 } else 620 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 621 fc_host_maxframe_size(shost) = bottom->maximum_frame_size; 622 fc_host_supported_speeds(shost) = 623 zfcp_fsf_convert_portspeed(bottom->supported_speed); 624 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types, 625 FC_FC4_LIST_SIZE); 626 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types, 627 FC_FC4_LIST_SIZE); 628 } 629 630 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) 631 { 632 struct fsf_qtcb *qtcb = req->qtcb; 633 634 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 635 return; 636 637 switch (qtcb->header.fsf_status) { 638 case FSF_GOOD: 639 zfcp_fsf_exchange_port_evaluate(req); 640 break; 641 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 642 zfcp_fsf_exchange_port_evaluate(req); 643 zfcp_fsf_link_down_info_eval(req, 644 &qtcb->header.fsf_status_qual.link_down_info); 645 break; 646 } 647 } 648 649 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool) 650 { 651 struct zfcp_fsf_req *req; 652 653 if (likely(pool)) 654 req = mempool_alloc(pool, GFP_ATOMIC); 655 else 656 req = kmalloc(sizeof(*req), GFP_ATOMIC); 657 658 if (unlikely(!req)) 659 return NULL; 660 661 memset(req, 0, sizeof(*req)); 662 req->pool = pool; 663 return req; 664 } 665 666 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool) 667 { 668 struct fsf_qtcb *qtcb; 669 670 if (likely(pool)) 671 qtcb = mempool_alloc(pool, GFP_ATOMIC); 672 else 673 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC); 674 675 if (unlikely(!qtcb)) 676 return NULL; 677 678 memset(qtcb, 0, sizeof(*qtcb)); 679 return qtcb; 680 } 681 682 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, 683 u32 fsf_cmd, u8 sbtype, 684 mempool_t *pool) 685 { 686 struct zfcp_adapter *adapter = qdio->adapter; 687 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool); 688 689 if (unlikely(!req)) 690 return ERR_PTR(-ENOMEM); 691 692 if (adapter->req_no == 0) 693 adapter->req_no++; 694 695 INIT_LIST_HEAD(&req->list); 696 init_timer(&req->timer); 697 init_completion(&req->completion); 698 699 req->adapter = adapter; 700 req->fsf_command = fsf_cmd; 701 req->req_id = adapter->req_no; 702 703 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) { 704 if (likely(pool)) 705 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool); 706 else 707 req->qtcb = zfcp_qtcb_alloc(NULL); 708 709 if (unlikely(!req->qtcb)) { 710 zfcp_fsf_req_free(req); 711 return ERR_PTR(-ENOMEM); 712 } 713 714 req->seq_no = adapter->fsf_req_seq_no; 715 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 716 req->qtcb->prefix.req_id = req->req_id; 717 req->qtcb->prefix.ulp_info = 26; 718 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command]; 719 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; 720 req->qtcb->header.req_handle = req->req_id; 721 req->qtcb->header.fsf_command = req->fsf_command; 722 } 723 724 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype, 725 req->qtcb, sizeof(struct fsf_qtcb)); 726 727 return req; 728 } 729 730 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) 731 { 732 struct zfcp_adapter *adapter = req->adapter; 733 struct zfcp_qdio *qdio = adapter->qdio; 734 int with_qtcb = (req->qtcb != NULL); 735 int req_id = req->req_id; 736 737 zfcp_reqlist_add(adapter->req_list, req); 738 739 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free); 740 req->issued = get_tod_clock(); 741 if (zfcp_qdio_send(qdio, &req->qdio_req)) { 742 del_timer(&req->timer); 743 /* lookup request again, list might have changed */ 744 zfcp_reqlist_find_rm(adapter->req_list, req_id); 745 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1"); 746 return -EIO; 747 } 748 749 /* Don't increase for unsolicited status */ 750 if (with_qtcb) 751 adapter->fsf_req_seq_no++; 752 adapter->req_no++; 753 754 return 0; 755 } 756 757 /** 758 * zfcp_fsf_status_read - send status read request 759 * @adapter: pointer to struct zfcp_adapter 760 * @req_flags: request flags 761 * Returns: 0 on success, ERROR otherwise 762 */ 763 int zfcp_fsf_status_read(struct zfcp_qdio *qdio) 764 { 765 struct zfcp_adapter *adapter = qdio->adapter; 766 struct zfcp_fsf_req *req; 767 struct fsf_status_read_buffer *sr_buf; 768 struct page *page; 769 int retval = -EIO; 770 771 spin_lock_irq(&qdio->req_q_lock); 772 if (zfcp_qdio_sbal_get(qdio)) 773 goto out; 774 775 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 776 SBAL_SFLAGS0_TYPE_STATUS, 777 adapter->pool.status_read_req); 778 if (IS_ERR(req)) { 779 retval = PTR_ERR(req); 780 goto out; 781 } 782 783 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC); 784 if (!page) { 785 retval = -ENOMEM; 786 goto failed_buf; 787 } 788 sr_buf = page_address(page); 789 memset(sr_buf, 0, sizeof(*sr_buf)); 790 req->data = sr_buf; 791 792 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf)); 793 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 794 795 retval = zfcp_fsf_req_send(req); 796 if (retval) 797 goto failed_req_send; 798 799 goto out; 800 801 failed_req_send: 802 req->data = NULL; 803 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); 804 failed_buf: 805 zfcp_dbf_hba_fsf_uss("fssr__1", req); 806 zfcp_fsf_req_free(req); 807 out: 808 spin_unlock_irq(&qdio->req_q_lock); 809 return retval; 810 } 811 812 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) 813 { 814 struct scsi_device *sdev = req->data; 815 struct zfcp_scsi_dev *zfcp_sdev; 816 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual; 817 818 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 819 return; 820 821 zfcp_sdev = sdev_to_zfcp(sdev); 822 823 switch (req->qtcb->header.fsf_status) { 824 case FSF_PORT_HANDLE_NOT_VALID: 825 if (fsq->word[0] == fsq->word[1]) { 826 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, 827 "fsafch1"); 828 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 829 } 830 break; 831 case FSF_LUN_HANDLE_NOT_VALID: 832 if (fsq->word[0] == fsq->word[1]) { 833 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2"); 834 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 835 } 836 break; 837 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 838 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 839 break; 840 case FSF_PORT_BOXED: 841 zfcp_erp_set_port_status(zfcp_sdev->port, 842 ZFCP_STATUS_COMMON_ACCESS_BOXED); 843 zfcp_erp_port_reopen(zfcp_sdev->port, 844 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3"); 845 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 846 break; 847 case FSF_LUN_BOXED: 848 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED); 849 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED, 850 "fsafch4"); 851 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 852 break; 853 case FSF_ADAPTER_STATUS_AVAILABLE: 854 switch (fsq->word[0]) { 855 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 856 zfcp_fc_test_link(zfcp_sdev->port); 857 /* fall through */ 858 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 859 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 860 break; 861 } 862 break; 863 case FSF_GOOD: 864 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 865 break; 866 } 867 } 868 869 /** 870 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command 871 * @scmnd: The SCSI command to abort 872 * Returns: pointer to struct zfcp_fsf_req 873 */ 874 875 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd) 876 { 877 struct zfcp_fsf_req *req = NULL; 878 struct scsi_device *sdev = scmnd->device; 879 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 880 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio; 881 unsigned long old_req_id = (unsigned long) scmnd->host_scribble; 882 883 spin_lock_irq(&qdio->req_q_lock); 884 if (zfcp_qdio_sbal_get(qdio)) 885 goto out; 886 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND, 887 SBAL_SFLAGS0_TYPE_READ, 888 qdio->adapter->pool.scsi_abort); 889 if (IS_ERR(req)) { 890 req = NULL; 891 goto out; 892 } 893 894 if (unlikely(!(atomic_read(&zfcp_sdev->status) & 895 ZFCP_STATUS_COMMON_UNBLOCKED))) 896 goto out_error_free; 897 898 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 899 900 req->data = sdev; 901 req->handler = zfcp_fsf_abort_fcp_command_handler; 902 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 903 req->qtcb->header.port_handle = zfcp_sdev->port->handle; 904 req->qtcb->bottom.support.req_handle = (u64) old_req_id; 905 906 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); 907 if (!zfcp_fsf_req_send(req)) 908 goto out; 909 910 out_error_free: 911 zfcp_fsf_req_free(req); 912 req = NULL; 913 out: 914 spin_unlock_irq(&qdio->req_q_lock); 915 return req; 916 } 917 918 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req) 919 { 920 struct zfcp_adapter *adapter = req->adapter; 921 struct zfcp_fsf_ct_els *ct = req->data; 922 struct fsf_qtcb_header *header = &req->qtcb->header; 923 924 ct->status = -EINVAL; 925 926 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 927 goto skip_fsfstatus; 928 929 switch (header->fsf_status) { 930 case FSF_GOOD: 931 zfcp_dbf_san_res("fsscth2", req); 932 ct->status = 0; 933 break; 934 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 935 zfcp_fsf_class_not_supp(req); 936 break; 937 case FSF_ADAPTER_STATUS_AVAILABLE: 938 switch (header->fsf_status_qual.word[0]){ 939 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 940 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 941 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 942 break; 943 } 944 break; 945 case FSF_PORT_BOXED: 946 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 947 break; 948 case FSF_PORT_HANDLE_NOT_VALID: 949 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1"); 950 /* fall through */ 951 case FSF_GENERIC_COMMAND_REJECTED: 952 case FSF_PAYLOAD_SIZE_MISMATCH: 953 case FSF_REQUEST_SIZE_TOO_LARGE: 954 case FSF_RESPONSE_SIZE_TOO_LARGE: 955 case FSF_SBAL_MISMATCH: 956 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 957 break; 958 } 959 960 skip_fsfstatus: 961 if (ct->handler) 962 ct->handler(ct->handler_data); 963 } 964 965 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio, 966 struct zfcp_qdio_req *q_req, 967 struct scatterlist *sg_req, 968 struct scatterlist *sg_resp) 969 { 970 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length); 971 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length); 972 zfcp_qdio_set_sbale_last(qdio, q_req); 973 } 974 975 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, 976 struct scatterlist *sg_req, 977 struct scatterlist *sg_resp) 978 { 979 struct zfcp_adapter *adapter = req->adapter; 980 struct zfcp_qdio *qdio = adapter->qdio; 981 struct fsf_qtcb *qtcb = req->qtcb; 982 u32 feat = adapter->adapter_features; 983 984 if (zfcp_adapter_multi_buffer_active(adapter)) { 985 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req)) 986 return -EIO; 987 qtcb->bottom.support.req_buf_length = 988 zfcp_qdio_real_bytes(sg_req); 989 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp)) 990 return -EIO; 991 qtcb->bottom.support.resp_buf_length = 992 zfcp_qdio_real_bytes(sg_resp); 993 994 zfcp_qdio_set_data_div(qdio, &req->qdio_req, 995 zfcp_qdio_sbale_count(sg_req)); 996 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 997 zfcp_qdio_set_scount(qdio, &req->qdio_req); 998 return 0; 999 } 1000 1001 /* use single, unchained SBAL if it can hold the request */ 1002 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) { 1003 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req, 1004 sg_req, sg_resp); 1005 return 0; 1006 } 1007 1008 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) 1009 return -EOPNOTSUPP; 1010 1011 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req)) 1012 return -EIO; 1013 1014 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req); 1015 1016 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1017 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req); 1018 1019 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp)) 1020 return -EIO; 1021 1022 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp); 1023 1024 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1025 1026 return 0; 1027 } 1028 1029 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req, 1030 struct scatterlist *sg_req, 1031 struct scatterlist *sg_resp, 1032 unsigned int timeout) 1033 { 1034 int ret; 1035 1036 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp); 1037 if (ret) 1038 return ret; 1039 1040 /* common settings for ct/gs and els requests */ 1041 if (timeout > 255) 1042 timeout = 255; /* max value accepted by hardware */ 1043 req->qtcb->bottom.support.service_class = FSF_CLASS_3; 1044 req->qtcb->bottom.support.timeout = timeout; 1045 zfcp_fsf_start_timer(req, (timeout + 10) * HZ); 1046 1047 return 0; 1048 } 1049 1050 /** 1051 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1052 * @ct: pointer to struct zfcp_send_ct with data for request 1053 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req 1054 */ 1055 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port, 1056 struct zfcp_fsf_ct_els *ct, mempool_t *pool, 1057 unsigned int timeout) 1058 { 1059 struct zfcp_qdio *qdio = wka_port->adapter->qdio; 1060 struct zfcp_fsf_req *req; 1061 int ret = -EIO; 1062 1063 spin_lock_irq(&qdio->req_q_lock); 1064 if (zfcp_qdio_sbal_get(qdio)) 1065 goto out; 1066 1067 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, 1068 SBAL_SFLAGS0_TYPE_WRITE_READ, pool); 1069 1070 if (IS_ERR(req)) { 1071 ret = PTR_ERR(req); 1072 goto out; 1073 } 1074 1075 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1076 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout); 1077 if (ret) 1078 goto failed_send; 1079 1080 req->handler = zfcp_fsf_send_ct_handler; 1081 req->qtcb->header.port_handle = wka_port->handle; 1082 ct->d_id = wka_port->d_id; 1083 req->data = ct; 1084 1085 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id); 1086 1087 ret = zfcp_fsf_req_send(req); 1088 if (ret) 1089 goto failed_send; 1090 1091 goto out; 1092 1093 failed_send: 1094 zfcp_fsf_req_free(req); 1095 out: 1096 spin_unlock_irq(&qdio->req_q_lock); 1097 return ret; 1098 } 1099 1100 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req) 1101 { 1102 struct zfcp_fsf_ct_els *send_els = req->data; 1103 struct fsf_qtcb_header *header = &req->qtcb->header; 1104 1105 send_els->status = -EINVAL; 1106 1107 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1108 goto skip_fsfstatus; 1109 1110 switch (header->fsf_status) { 1111 case FSF_GOOD: 1112 zfcp_dbf_san_res("fsselh1", req); 1113 send_els->status = 0; 1114 break; 1115 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1116 zfcp_fsf_class_not_supp(req); 1117 break; 1118 case FSF_ADAPTER_STATUS_AVAILABLE: 1119 switch (header->fsf_status_qual.word[0]){ 1120 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1121 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1122 case FSF_SQ_RETRY_IF_POSSIBLE: 1123 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1124 break; 1125 } 1126 break; 1127 case FSF_ELS_COMMAND_REJECTED: 1128 case FSF_PAYLOAD_SIZE_MISMATCH: 1129 case FSF_REQUEST_SIZE_TOO_LARGE: 1130 case FSF_RESPONSE_SIZE_TOO_LARGE: 1131 break; 1132 case FSF_SBAL_MISMATCH: 1133 /* should never occur, avoided in zfcp_fsf_send_els */ 1134 /* fall through */ 1135 default: 1136 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1137 break; 1138 } 1139 skip_fsfstatus: 1140 if (send_els->handler) 1141 send_els->handler(send_els->handler_data); 1142 } 1143 1144 /** 1145 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1146 * @els: pointer to struct zfcp_send_els with data for the command 1147 */ 1148 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id, 1149 struct zfcp_fsf_ct_els *els, unsigned int timeout) 1150 { 1151 struct zfcp_fsf_req *req; 1152 struct zfcp_qdio *qdio = adapter->qdio; 1153 int ret = -EIO; 1154 1155 spin_lock_irq(&qdio->req_q_lock); 1156 if (zfcp_qdio_sbal_get(qdio)) 1157 goto out; 1158 1159 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, 1160 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL); 1161 1162 if (IS_ERR(req)) { 1163 ret = PTR_ERR(req); 1164 goto out; 1165 } 1166 1167 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1168 1169 if (!zfcp_adapter_multi_buffer_active(adapter)) 1170 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2); 1171 1172 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout); 1173 1174 if (ret) 1175 goto failed_send; 1176 1177 hton24(req->qtcb->bottom.support.d_id, d_id); 1178 req->handler = zfcp_fsf_send_els_handler; 1179 els->d_id = d_id; 1180 req->data = els; 1181 1182 zfcp_dbf_san_req("fssels1", req, d_id); 1183 1184 ret = zfcp_fsf_req_send(req); 1185 if (ret) 1186 goto failed_send; 1187 1188 goto out; 1189 1190 failed_send: 1191 zfcp_fsf_req_free(req); 1192 out: 1193 spin_unlock_irq(&qdio->req_q_lock); 1194 return ret; 1195 } 1196 1197 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 1198 { 1199 struct zfcp_fsf_req *req; 1200 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1201 int retval = -EIO; 1202 1203 spin_lock_irq(&qdio->req_q_lock); 1204 if (zfcp_qdio_sbal_get(qdio)) 1205 goto out; 1206 1207 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, 1208 SBAL_SFLAGS0_TYPE_READ, 1209 qdio->adapter->pool.erp_req); 1210 1211 if (IS_ERR(req)) { 1212 retval = PTR_ERR(req); 1213 goto out; 1214 } 1215 1216 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1217 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1218 1219 req->qtcb->bottom.config.feature_selection = 1220 FSF_FEATURE_NOTIFICATION_LOST | 1221 FSF_FEATURE_UPDATE_ALERT; 1222 req->erp_action = erp_action; 1223 req->handler = zfcp_fsf_exchange_config_data_handler; 1224 erp_action->fsf_req_id = req->req_id; 1225 1226 zfcp_fsf_start_erp_timer(req); 1227 retval = zfcp_fsf_req_send(req); 1228 if (retval) { 1229 zfcp_fsf_req_free(req); 1230 erp_action->fsf_req_id = 0; 1231 } 1232 out: 1233 spin_unlock_irq(&qdio->req_q_lock); 1234 return retval; 1235 } 1236 1237 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio, 1238 struct fsf_qtcb_bottom_config *data) 1239 { 1240 struct zfcp_fsf_req *req = NULL; 1241 int retval = -EIO; 1242 1243 spin_lock_irq(&qdio->req_q_lock); 1244 if (zfcp_qdio_sbal_get(qdio)) 1245 goto out_unlock; 1246 1247 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, 1248 SBAL_SFLAGS0_TYPE_READ, NULL); 1249 1250 if (IS_ERR(req)) { 1251 retval = PTR_ERR(req); 1252 goto out_unlock; 1253 } 1254 1255 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1256 req->handler = zfcp_fsf_exchange_config_data_handler; 1257 1258 req->qtcb->bottom.config.feature_selection = 1259 FSF_FEATURE_NOTIFICATION_LOST | 1260 FSF_FEATURE_UPDATE_ALERT; 1261 1262 if (data) 1263 req->data = data; 1264 1265 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1266 retval = zfcp_fsf_req_send(req); 1267 spin_unlock_irq(&qdio->req_q_lock); 1268 if (!retval) 1269 wait_for_completion(&req->completion); 1270 1271 zfcp_fsf_req_free(req); 1272 return retval; 1273 1274 out_unlock: 1275 spin_unlock_irq(&qdio->req_q_lock); 1276 return retval; 1277 } 1278 1279 /** 1280 * zfcp_fsf_exchange_port_data - request information about local port 1281 * @erp_action: ERP action for the adapter for which port data is requested 1282 * Returns: 0 on success, error otherwise 1283 */ 1284 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) 1285 { 1286 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1287 struct zfcp_fsf_req *req; 1288 int retval = -EIO; 1289 1290 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) 1291 return -EOPNOTSUPP; 1292 1293 spin_lock_irq(&qdio->req_q_lock); 1294 if (zfcp_qdio_sbal_get(qdio)) 1295 goto out; 1296 1297 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, 1298 SBAL_SFLAGS0_TYPE_READ, 1299 qdio->adapter->pool.erp_req); 1300 1301 if (IS_ERR(req)) { 1302 retval = PTR_ERR(req); 1303 goto out; 1304 } 1305 1306 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1307 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1308 1309 req->handler = zfcp_fsf_exchange_port_data_handler; 1310 req->erp_action = erp_action; 1311 erp_action->fsf_req_id = req->req_id; 1312 1313 zfcp_fsf_start_erp_timer(req); 1314 retval = zfcp_fsf_req_send(req); 1315 if (retval) { 1316 zfcp_fsf_req_free(req); 1317 erp_action->fsf_req_id = 0; 1318 } 1319 out: 1320 spin_unlock_irq(&qdio->req_q_lock); 1321 return retval; 1322 } 1323 1324 /** 1325 * zfcp_fsf_exchange_port_data_sync - request information about local port 1326 * @qdio: pointer to struct zfcp_qdio 1327 * @data: pointer to struct fsf_qtcb_bottom_port 1328 * Returns: 0 on success, error otherwise 1329 */ 1330 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, 1331 struct fsf_qtcb_bottom_port *data) 1332 { 1333 struct zfcp_fsf_req *req = NULL; 1334 int retval = -EIO; 1335 1336 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) 1337 return -EOPNOTSUPP; 1338 1339 spin_lock_irq(&qdio->req_q_lock); 1340 if (zfcp_qdio_sbal_get(qdio)) 1341 goto out_unlock; 1342 1343 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, 1344 SBAL_SFLAGS0_TYPE_READ, NULL); 1345 1346 if (IS_ERR(req)) { 1347 retval = PTR_ERR(req); 1348 goto out_unlock; 1349 } 1350 1351 if (data) 1352 req->data = data; 1353 1354 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1355 1356 req->handler = zfcp_fsf_exchange_port_data_handler; 1357 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1358 retval = zfcp_fsf_req_send(req); 1359 spin_unlock_irq(&qdio->req_q_lock); 1360 1361 if (!retval) 1362 wait_for_completion(&req->completion); 1363 1364 zfcp_fsf_req_free(req); 1365 1366 return retval; 1367 1368 out_unlock: 1369 spin_unlock_irq(&qdio->req_q_lock); 1370 return retval; 1371 } 1372 1373 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) 1374 { 1375 struct zfcp_port *port = req->data; 1376 struct fsf_qtcb_header *header = &req->qtcb->header; 1377 struct fc_els_flogi *plogi; 1378 1379 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1380 goto out; 1381 1382 switch (header->fsf_status) { 1383 case FSF_PORT_ALREADY_OPEN: 1384 break; 1385 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 1386 dev_warn(&req->adapter->ccw_device->dev, 1387 "Not enough FCP adapter resources to open " 1388 "remote port 0x%016Lx\n", 1389 (unsigned long long)port->wwpn); 1390 zfcp_erp_set_port_status(port, 1391 ZFCP_STATUS_COMMON_ERP_FAILED); 1392 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1393 break; 1394 case FSF_ADAPTER_STATUS_AVAILABLE: 1395 switch (header->fsf_status_qual.word[0]) { 1396 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1397 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1398 case FSF_SQ_NO_RETRY_POSSIBLE: 1399 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1400 break; 1401 } 1402 break; 1403 case FSF_GOOD: 1404 port->handle = header->port_handle; 1405 atomic_or(ZFCP_STATUS_COMMON_OPEN | 1406 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1407 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED, 1408 &port->status); 1409 /* check whether D_ID has changed during open */ 1410 /* 1411 * FIXME: This check is not airtight, as the FCP channel does 1412 * not monitor closures of target port connections caused on 1413 * the remote side. Thus, they might miss out on invalidating 1414 * locally cached WWPNs (and other N_Port parameters) of gone 1415 * target ports. So, our heroic attempt to make things safe 1416 * could be undermined by 'open port' response data tagged with 1417 * obsolete WWPNs. Another reason to monitor potential 1418 * connection closures ourself at least (by interpreting 1419 * incoming ELS' and unsolicited status). It just crosses my 1420 * mind that one should be able to cross-check by means of 1421 * another GID_PN straight after a port has been opened. 1422 * Alternately, an ADISC/PDISC ELS should suffice, as well. 1423 */ 1424 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els; 1425 if (req->qtcb->bottom.support.els1_length >= 1426 FSF_PLOGI_MIN_LEN) 1427 zfcp_fc_plogi_evaluate(port, plogi); 1428 break; 1429 case FSF_UNKNOWN_OP_SUBTYPE: 1430 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1431 break; 1432 } 1433 1434 out: 1435 put_device(&port->dev); 1436 } 1437 1438 /** 1439 * zfcp_fsf_open_port - create and send open port request 1440 * @erp_action: pointer to struct zfcp_erp_action 1441 * Returns: 0 on success, error otherwise 1442 */ 1443 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 1444 { 1445 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1446 struct zfcp_port *port = erp_action->port; 1447 struct zfcp_fsf_req *req; 1448 int retval = -EIO; 1449 1450 spin_lock_irq(&qdio->req_q_lock); 1451 if (zfcp_qdio_sbal_get(qdio)) 1452 goto out; 1453 1454 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, 1455 SBAL_SFLAGS0_TYPE_READ, 1456 qdio->adapter->pool.erp_req); 1457 1458 if (IS_ERR(req)) { 1459 retval = PTR_ERR(req); 1460 goto out; 1461 } 1462 1463 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1464 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1465 1466 req->handler = zfcp_fsf_open_port_handler; 1467 hton24(req->qtcb->bottom.support.d_id, port->d_id); 1468 req->data = port; 1469 req->erp_action = erp_action; 1470 erp_action->fsf_req_id = req->req_id; 1471 get_device(&port->dev); 1472 1473 zfcp_fsf_start_erp_timer(req); 1474 retval = zfcp_fsf_req_send(req); 1475 if (retval) { 1476 zfcp_fsf_req_free(req); 1477 erp_action->fsf_req_id = 0; 1478 put_device(&port->dev); 1479 } 1480 out: 1481 spin_unlock_irq(&qdio->req_q_lock); 1482 return retval; 1483 } 1484 1485 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) 1486 { 1487 struct zfcp_port *port = req->data; 1488 1489 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1490 return; 1491 1492 switch (req->qtcb->header.fsf_status) { 1493 case FSF_PORT_HANDLE_NOT_VALID: 1494 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1"); 1495 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1496 break; 1497 case FSF_ADAPTER_STATUS_AVAILABLE: 1498 break; 1499 case FSF_GOOD: 1500 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN); 1501 break; 1502 } 1503 } 1504 1505 /** 1506 * zfcp_fsf_close_port - create and send close port request 1507 * @erp_action: pointer to struct zfcp_erp_action 1508 * Returns: 0 on success, error otherwise 1509 */ 1510 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 1511 { 1512 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1513 struct zfcp_fsf_req *req; 1514 int retval = -EIO; 1515 1516 spin_lock_irq(&qdio->req_q_lock); 1517 if (zfcp_qdio_sbal_get(qdio)) 1518 goto out; 1519 1520 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, 1521 SBAL_SFLAGS0_TYPE_READ, 1522 qdio->adapter->pool.erp_req); 1523 1524 if (IS_ERR(req)) { 1525 retval = PTR_ERR(req); 1526 goto out; 1527 } 1528 1529 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1530 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1531 1532 req->handler = zfcp_fsf_close_port_handler; 1533 req->data = erp_action->port; 1534 req->erp_action = erp_action; 1535 req->qtcb->header.port_handle = erp_action->port->handle; 1536 erp_action->fsf_req_id = req->req_id; 1537 1538 zfcp_fsf_start_erp_timer(req); 1539 retval = zfcp_fsf_req_send(req); 1540 if (retval) { 1541 zfcp_fsf_req_free(req); 1542 erp_action->fsf_req_id = 0; 1543 } 1544 out: 1545 spin_unlock_irq(&qdio->req_q_lock); 1546 return retval; 1547 } 1548 1549 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req) 1550 { 1551 struct zfcp_fc_wka_port *wka_port = req->data; 1552 struct fsf_qtcb_header *header = &req->qtcb->header; 1553 1554 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1555 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 1556 goto out; 1557 } 1558 1559 switch (header->fsf_status) { 1560 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 1561 dev_warn(&req->adapter->ccw_device->dev, 1562 "Opening WKA port 0x%x failed\n", wka_port->d_id); 1563 /* fall through */ 1564 case FSF_ADAPTER_STATUS_AVAILABLE: 1565 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1566 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 1567 break; 1568 case FSF_GOOD: 1569 wka_port->handle = header->port_handle; 1570 /* fall through */ 1571 case FSF_PORT_ALREADY_OPEN: 1572 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE; 1573 } 1574 out: 1575 wake_up(&wka_port->completion_wq); 1576 } 1577 1578 /** 1579 * zfcp_fsf_open_wka_port - create and send open wka-port request 1580 * @wka_port: pointer to struct zfcp_fc_wka_port 1581 * Returns: 0 on success, error otherwise 1582 */ 1583 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port) 1584 { 1585 struct zfcp_qdio *qdio = wka_port->adapter->qdio; 1586 struct zfcp_fsf_req *req; 1587 int retval = -EIO; 1588 1589 spin_lock_irq(&qdio->req_q_lock); 1590 if (zfcp_qdio_sbal_get(qdio)) 1591 goto out; 1592 1593 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, 1594 SBAL_SFLAGS0_TYPE_READ, 1595 qdio->adapter->pool.erp_req); 1596 1597 if (IS_ERR(req)) { 1598 retval = PTR_ERR(req); 1599 goto out; 1600 } 1601 1602 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1603 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1604 1605 req->handler = zfcp_fsf_open_wka_port_handler; 1606 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id); 1607 req->data = wka_port; 1608 1609 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1610 retval = zfcp_fsf_req_send(req); 1611 if (retval) 1612 zfcp_fsf_req_free(req); 1613 out: 1614 spin_unlock_irq(&qdio->req_q_lock); 1615 if (!retval) 1616 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id); 1617 return retval; 1618 } 1619 1620 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req) 1621 { 1622 struct zfcp_fc_wka_port *wka_port = req->data; 1623 1624 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) { 1625 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1626 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1"); 1627 } 1628 1629 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 1630 wake_up(&wka_port->completion_wq); 1631 } 1632 1633 /** 1634 * zfcp_fsf_close_wka_port - create and send close wka port request 1635 * @wka_port: WKA port to open 1636 * Returns: 0 on success, error otherwise 1637 */ 1638 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port) 1639 { 1640 struct zfcp_qdio *qdio = wka_port->adapter->qdio; 1641 struct zfcp_fsf_req *req; 1642 int retval = -EIO; 1643 1644 spin_lock_irq(&qdio->req_q_lock); 1645 if (zfcp_qdio_sbal_get(qdio)) 1646 goto out; 1647 1648 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, 1649 SBAL_SFLAGS0_TYPE_READ, 1650 qdio->adapter->pool.erp_req); 1651 1652 if (IS_ERR(req)) { 1653 retval = PTR_ERR(req); 1654 goto out; 1655 } 1656 1657 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1658 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1659 1660 req->handler = zfcp_fsf_close_wka_port_handler; 1661 req->data = wka_port; 1662 req->qtcb->header.port_handle = wka_port->handle; 1663 1664 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1665 retval = zfcp_fsf_req_send(req); 1666 if (retval) 1667 zfcp_fsf_req_free(req); 1668 out: 1669 spin_unlock_irq(&qdio->req_q_lock); 1670 if (!retval) 1671 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id); 1672 return retval; 1673 } 1674 1675 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) 1676 { 1677 struct zfcp_port *port = req->data; 1678 struct fsf_qtcb_header *header = &req->qtcb->header; 1679 struct scsi_device *sdev; 1680 1681 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1682 return; 1683 1684 switch (header->fsf_status) { 1685 case FSF_PORT_HANDLE_NOT_VALID: 1686 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1"); 1687 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1688 break; 1689 case FSF_PORT_BOXED: 1690 /* can't use generic zfcp_erp_modify_port_status because 1691 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ 1692 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1693 shost_for_each_device(sdev, port->adapter->scsi_host) 1694 if (sdev_to_zfcp(sdev)->port == port) 1695 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, 1696 &sdev_to_zfcp(sdev)->status); 1697 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED); 1698 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 1699 "fscpph2"); 1700 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1701 break; 1702 case FSF_ADAPTER_STATUS_AVAILABLE: 1703 switch (header->fsf_status_qual.word[0]) { 1704 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1705 /* fall through */ 1706 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1707 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1708 break; 1709 } 1710 break; 1711 case FSF_GOOD: 1712 /* can't use generic zfcp_erp_modify_port_status because 1713 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 1714 */ 1715 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1716 shost_for_each_device(sdev, port->adapter->scsi_host) 1717 if (sdev_to_zfcp(sdev)->port == port) 1718 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, 1719 &sdev_to_zfcp(sdev)->status); 1720 break; 1721 } 1722 } 1723 1724 /** 1725 * zfcp_fsf_close_physical_port - close physical port 1726 * @erp_action: pointer to struct zfcp_erp_action 1727 * Returns: 0 on success 1728 */ 1729 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 1730 { 1731 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1732 struct zfcp_fsf_req *req; 1733 int retval = -EIO; 1734 1735 spin_lock_irq(&qdio->req_q_lock); 1736 if (zfcp_qdio_sbal_get(qdio)) 1737 goto out; 1738 1739 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT, 1740 SBAL_SFLAGS0_TYPE_READ, 1741 qdio->adapter->pool.erp_req); 1742 1743 if (IS_ERR(req)) { 1744 retval = PTR_ERR(req); 1745 goto out; 1746 } 1747 1748 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1749 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1750 1751 req->data = erp_action->port; 1752 req->qtcb->header.port_handle = erp_action->port->handle; 1753 req->erp_action = erp_action; 1754 req->handler = zfcp_fsf_close_physical_port_handler; 1755 erp_action->fsf_req_id = req->req_id; 1756 1757 zfcp_fsf_start_erp_timer(req); 1758 retval = zfcp_fsf_req_send(req); 1759 if (retval) { 1760 zfcp_fsf_req_free(req); 1761 erp_action->fsf_req_id = 0; 1762 } 1763 out: 1764 spin_unlock_irq(&qdio->req_q_lock); 1765 return retval; 1766 } 1767 1768 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req) 1769 { 1770 struct zfcp_adapter *adapter = req->adapter; 1771 struct scsi_device *sdev = req->data; 1772 struct zfcp_scsi_dev *zfcp_sdev; 1773 struct fsf_qtcb_header *header = &req->qtcb->header; 1774 union fsf_status_qual *qual = &header->fsf_status_qual; 1775 1776 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1777 return; 1778 1779 zfcp_sdev = sdev_to_zfcp(sdev); 1780 1781 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED | 1782 ZFCP_STATUS_COMMON_ACCESS_BOXED, 1783 &zfcp_sdev->status); 1784 1785 switch (header->fsf_status) { 1786 1787 case FSF_PORT_HANDLE_NOT_VALID: 1788 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1"); 1789 /* fall through */ 1790 case FSF_LUN_ALREADY_OPEN: 1791 break; 1792 case FSF_PORT_BOXED: 1793 zfcp_erp_set_port_status(zfcp_sdev->port, 1794 ZFCP_STATUS_COMMON_ACCESS_BOXED); 1795 zfcp_erp_port_reopen(zfcp_sdev->port, 1796 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2"); 1797 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1798 break; 1799 case FSF_LUN_SHARING_VIOLATION: 1800 if (qual->word[0]) 1801 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev, 1802 "LUN 0x%Lx on port 0x%Lx is already in " 1803 "use by CSS%d, MIF Image ID %x\n", 1804 zfcp_scsi_dev_lun(sdev), 1805 (unsigned long long)zfcp_sdev->port->wwpn, 1806 qual->fsf_queue_designator.cssid, 1807 qual->fsf_queue_designator.hla); 1808 zfcp_erp_set_lun_status(sdev, 1809 ZFCP_STATUS_COMMON_ERP_FAILED | 1810 ZFCP_STATUS_COMMON_ACCESS_DENIED); 1811 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1812 break; 1813 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 1814 dev_warn(&adapter->ccw_device->dev, 1815 "No handle is available for LUN " 1816 "0x%016Lx on port 0x%016Lx\n", 1817 (unsigned long long)zfcp_scsi_dev_lun(sdev), 1818 (unsigned long long)zfcp_sdev->port->wwpn); 1819 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED); 1820 /* fall through */ 1821 case FSF_INVALID_COMMAND_OPTION: 1822 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1823 break; 1824 case FSF_ADAPTER_STATUS_AVAILABLE: 1825 switch (header->fsf_status_qual.word[0]) { 1826 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1827 zfcp_fc_test_link(zfcp_sdev->port); 1828 /* fall through */ 1829 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1830 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1831 break; 1832 } 1833 break; 1834 1835 case FSF_GOOD: 1836 zfcp_sdev->lun_handle = header->lun_handle; 1837 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status); 1838 break; 1839 } 1840 } 1841 1842 /** 1843 * zfcp_fsf_open_lun - open LUN 1844 * @erp_action: pointer to struct zfcp_erp_action 1845 * Returns: 0 on success, error otherwise 1846 */ 1847 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action) 1848 { 1849 struct zfcp_adapter *adapter = erp_action->adapter; 1850 struct zfcp_qdio *qdio = adapter->qdio; 1851 struct zfcp_fsf_req *req; 1852 int retval = -EIO; 1853 1854 spin_lock_irq(&qdio->req_q_lock); 1855 if (zfcp_qdio_sbal_get(qdio)) 1856 goto out; 1857 1858 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN, 1859 SBAL_SFLAGS0_TYPE_READ, 1860 adapter->pool.erp_req); 1861 1862 if (IS_ERR(req)) { 1863 retval = PTR_ERR(req); 1864 goto out; 1865 } 1866 1867 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1868 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1869 1870 req->qtcb->header.port_handle = erp_action->port->handle; 1871 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev); 1872 req->handler = zfcp_fsf_open_lun_handler; 1873 req->data = erp_action->sdev; 1874 req->erp_action = erp_action; 1875 erp_action->fsf_req_id = req->req_id; 1876 1877 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) 1878 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; 1879 1880 zfcp_fsf_start_erp_timer(req); 1881 retval = zfcp_fsf_req_send(req); 1882 if (retval) { 1883 zfcp_fsf_req_free(req); 1884 erp_action->fsf_req_id = 0; 1885 } 1886 out: 1887 spin_unlock_irq(&qdio->req_q_lock); 1888 return retval; 1889 } 1890 1891 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req) 1892 { 1893 struct scsi_device *sdev = req->data; 1894 struct zfcp_scsi_dev *zfcp_sdev; 1895 1896 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1897 return; 1898 1899 zfcp_sdev = sdev_to_zfcp(sdev); 1900 1901 switch (req->qtcb->header.fsf_status) { 1902 case FSF_PORT_HANDLE_NOT_VALID: 1903 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1"); 1904 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1905 break; 1906 case FSF_LUN_HANDLE_NOT_VALID: 1907 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2"); 1908 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1909 break; 1910 case FSF_PORT_BOXED: 1911 zfcp_erp_set_port_status(zfcp_sdev->port, 1912 ZFCP_STATUS_COMMON_ACCESS_BOXED); 1913 zfcp_erp_port_reopen(zfcp_sdev->port, 1914 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3"); 1915 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1916 break; 1917 case FSF_ADAPTER_STATUS_AVAILABLE: 1918 switch (req->qtcb->header.fsf_status_qual.word[0]) { 1919 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1920 zfcp_fc_test_link(zfcp_sdev->port); 1921 /* fall through */ 1922 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1923 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1924 break; 1925 } 1926 break; 1927 case FSF_GOOD: 1928 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status); 1929 break; 1930 } 1931 } 1932 1933 /** 1934 * zfcp_fsf_close_LUN - close LUN 1935 * @erp_action: pointer to erp_action triggering the "close LUN" 1936 * Returns: 0 on success, error otherwise 1937 */ 1938 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action) 1939 { 1940 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1941 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev); 1942 struct zfcp_fsf_req *req; 1943 int retval = -EIO; 1944 1945 spin_lock_irq(&qdio->req_q_lock); 1946 if (zfcp_qdio_sbal_get(qdio)) 1947 goto out; 1948 1949 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN, 1950 SBAL_SFLAGS0_TYPE_READ, 1951 qdio->adapter->pool.erp_req); 1952 1953 if (IS_ERR(req)) { 1954 retval = PTR_ERR(req); 1955 goto out; 1956 } 1957 1958 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1959 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1960 1961 req->qtcb->header.port_handle = erp_action->port->handle; 1962 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 1963 req->handler = zfcp_fsf_close_lun_handler; 1964 req->data = erp_action->sdev; 1965 req->erp_action = erp_action; 1966 erp_action->fsf_req_id = req->req_id; 1967 1968 zfcp_fsf_start_erp_timer(req); 1969 retval = zfcp_fsf_req_send(req); 1970 if (retval) { 1971 zfcp_fsf_req_free(req); 1972 erp_action->fsf_req_id = 0; 1973 } 1974 out: 1975 spin_unlock_irq(&qdio->req_q_lock); 1976 return retval; 1977 } 1978 1979 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat) 1980 { 1981 lat_rec->sum += lat; 1982 lat_rec->min = min(lat_rec->min, lat); 1983 lat_rec->max = max(lat_rec->max, lat); 1984 } 1985 1986 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi) 1987 { 1988 struct fsf_qual_latency_info *lat_in; 1989 struct latency_cont *lat = NULL; 1990 struct zfcp_scsi_dev *zfcp_sdev; 1991 struct zfcp_blk_drv_data blktrc; 1992 int ticks = req->adapter->timer_ticks; 1993 1994 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info; 1995 1996 blktrc.flags = 0; 1997 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC; 1998 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1999 blktrc.flags |= ZFCP_BLK_REQ_ERROR; 2000 blktrc.inb_usage = 0; 2001 blktrc.outb_usage = req->qdio_req.qdio_outb_usage; 2002 2003 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA && 2004 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 2005 zfcp_sdev = sdev_to_zfcp(scsi->device); 2006 blktrc.flags |= ZFCP_BLK_LAT_VALID; 2007 blktrc.channel_lat = lat_in->channel_lat * ticks; 2008 blktrc.fabric_lat = lat_in->fabric_lat * ticks; 2009 2010 switch (req->qtcb->bottom.io.data_direction) { 2011 case FSF_DATADIR_DIF_READ_STRIP: 2012 case FSF_DATADIR_DIF_READ_CONVERT: 2013 case FSF_DATADIR_READ: 2014 lat = &zfcp_sdev->latencies.read; 2015 break; 2016 case FSF_DATADIR_DIF_WRITE_INSERT: 2017 case FSF_DATADIR_DIF_WRITE_CONVERT: 2018 case FSF_DATADIR_WRITE: 2019 lat = &zfcp_sdev->latencies.write; 2020 break; 2021 case FSF_DATADIR_CMND: 2022 lat = &zfcp_sdev->latencies.cmd; 2023 break; 2024 } 2025 2026 if (lat) { 2027 spin_lock(&zfcp_sdev->latencies.lock); 2028 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat); 2029 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat); 2030 lat->counter++; 2031 spin_unlock(&zfcp_sdev->latencies.lock); 2032 } 2033 } 2034 2035 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc, 2036 sizeof(blktrc)); 2037 } 2038 2039 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req) 2040 { 2041 struct scsi_cmnd *scmnd = req->data; 2042 struct scsi_device *sdev = scmnd->device; 2043 struct zfcp_scsi_dev *zfcp_sdev; 2044 struct fsf_qtcb_header *header = &req->qtcb->header; 2045 2046 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) 2047 return; 2048 2049 zfcp_sdev = sdev_to_zfcp(sdev); 2050 2051 switch (header->fsf_status) { 2052 case FSF_HANDLE_MISMATCH: 2053 case FSF_PORT_HANDLE_NOT_VALID: 2054 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1"); 2055 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2056 break; 2057 case FSF_FCPLUN_NOT_VALID: 2058 case FSF_LUN_HANDLE_NOT_VALID: 2059 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2"); 2060 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2061 break; 2062 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 2063 zfcp_fsf_class_not_supp(req); 2064 break; 2065 case FSF_DIRECTION_INDICATOR_NOT_VALID: 2066 dev_err(&req->adapter->ccw_device->dev, 2067 "Incorrect direction %d, LUN 0x%016Lx on port " 2068 "0x%016Lx closed\n", 2069 req->qtcb->bottom.io.data_direction, 2070 (unsigned long long)zfcp_scsi_dev_lun(sdev), 2071 (unsigned long long)zfcp_sdev->port->wwpn); 2072 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0, 2073 "fssfch3"); 2074 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2075 break; 2076 case FSF_CMND_LENGTH_NOT_VALID: 2077 dev_err(&req->adapter->ccw_device->dev, 2078 "Incorrect CDB length %d, LUN 0x%016Lx on " 2079 "port 0x%016Lx closed\n", 2080 req->qtcb->bottom.io.fcp_cmnd_length, 2081 (unsigned long long)zfcp_scsi_dev_lun(sdev), 2082 (unsigned long long)zfcp_sdev->port->wwpn); 2083 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0, 2084 "fssfch4"); 2085 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2086 break; 2087 case FSF_PORT_BOXED: 2088 zfcp_erp_set_port_status(zfcp_sdev->port, 2089 ZFCP_STATUS_COMMON_ACCESS_BOXED); 2090 zfcp_erp_port_reopen(zfcp_sdev->port, 2091 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5"); 2092 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2093 break; 2094 case FSF_LUN_BOXED: 2095 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED); 2096 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED, 2097 "fssfch6"); 2098 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2099 break; 2100 case FSF_ADAPTER_STATUS_AVAILABLE: 2101 if (header->fsf_status_qual.word[0] == 2102 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE) 2103 zfcp_fc_test_link(zfcp_sdev->port); 2104 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2105 break; 2106 } 2107 } 2108 2109 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req) 2110 { 2111 struct scsi_cmnd *scpnt; 2112 struct fcp_resp_with_ext *fcp_rsp; 2113 unsigned long flags; 2114 2115 read_lock_irqsave(&req->adapter->abort_lock, flags); 2116 2117 scpnt = req->data; 2118 if (unlikely(!scpnt)) { 2119 read_unlock_irqrestore(&req->adapter->abort_lock, flags); 2120 return; 2121 } 2122 2123 zfcp_fsf_fcp_handler_common(req); 2124 2125 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 2126 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED); 2127 goto skip_fsfstatus; 2128 } 2129 2130 switch (req->qtcb->header.fsf_status) { 2131 case FSF_INCONSISTENT_PROT_DATA: 2132 case FSF_INVALID_PROT_PARM: 2133 set_host_byte(scpnt, DID_ERROR); 2134 goto skip_fsfstatus; 2135 case FSF_BLOCK_GUARD_CHECK_FAILURE: 2136 zfcp_scsi_dif_sense_error(scpnt, 0x1); 2137 goto skip_fsfstatus; 2138 case FSF_APP_TAG_CHECK_FAILURE: 2139 zfcp_scsi_dif_sense_error(scpnt, 0x2); 2140 goto skip_fsfstatus; 2141 case FSF_REF_TAG_CHECK_FAILURE: 2142 zfcp_scsi_dif_sense_error(scpnt, 0x3); 2143 goto skip_fsfstatus; 2144 } 2145 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp; 2146 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt); 2147 2148 skip_fsfstatus: 2149 zfcp_fsf_req_trace(req, scpnt); 2150 zfcp_dbf_scsi_result(scpnt, req); 2151 2152 scpnt->host_scribble = NULL; 2153 (scpnt->scsi_done) (scpnt); 2154 /* 2155 * We must hold this lock until scsi_done has been called. 2156 * Otherwise we may call scsi_done after abort regarding this 2157 * command has completed. 2158 * Note: scsi_done must not block! 2159 */ 2160 read_unlock_irqrestore(&req->adapter->abort_lock, flags); 2161 } 2162 2163 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir) 2164 { 2165 switch (scsi_get_prot_op(scsi_cmnd)) { 2166 case SCSI_PROT_NORMAL: 2167 switch (scsi_cmnd->sc_data_direction) { 2168 case DMA_NONE: 2169 *data_dir = FSF_DATADIR_CMND; 2170 break; 2171 case DMA_FROM_DEVICE: 2172 *data_dir = FSF_DATADIR_READ; 2173 break; 2174 case DMA_TO_DEVICE: 2175 *data_dir = FSF_DATADIR_WRITE; 2176 break; 2177 case DMA_BIDIRECTIONAL: 2178 return -EINVAL; 2179 } 2180 break; 2181 2182 case SCSI_PROT_READ_STRIP: 2183 *data_dir = FSF_DATADIR_DIF_READ_STRIP; 2184 break; 2185 case SCSI_PROT_WRITE_INSERT: 2186 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT; 2187 break; 2188 case SCSI_PROT_READ_PASS: 2189 *data_dir = FSF_DATADIR_DIF_READ_CONVERT; 2190 break; 2191 case SCSI_PROT_WRITE_PASS: 2192 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT; 2193 break; 2194 default: 2195 return -EINVAL; 2196 } 2197 2198 return 0; 2199 } 2200 2201 /** 2202 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command) 2203 * @scsi_cmnd: scsi command to be sent 2204 */ 2205 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd) 2206 { 2207 struct zfcp_fsf_req *req; 2208 struct fcp_cmnd *fcp_cmnd; 2209 u8 sbtype = SBAL_SFLAGS0_TYPE_READ; 2210 int retval = -EIO; 2211 struct scsi_device *sdev = scsi_cmnd->device; 2212 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 2213 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 2214 struct zfcp_qdio *qdio = adapter->qdio; 2215 struct fsf_qtcb_bottom_io *io; 2216 unsigned long flags; 2217 2218 if (unlikely(!(atomic_read(&zfcp_sdev->status) & 2219 ZFCP_STATUS_COMMON_UNBLOCKED))) 2220 return -EBUSY; 2221 2222 spin_lock_irqsave(&qdio->req_q_lock, flags); 2223 if (atomic_read(&qdio->req_q_free) <= 0) { 2224 atomic_inc(&qdio->req_q_full); 2225 goto out; 2226 } 2227 2228 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) 2229 sbtype = SBAL_SFLAGS0_TYPE_WRITE; 2230 2231 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, 2232 sbtype, adapter->pool.scsi_req); 2233 2234 if (IS_ERR(req)) { 2235 retval = PTR_ERR(req); 2236 goto out; 2237 } 2238 2239 scsi_cmnd->host_scribble = (unsigned char *) req->req_id; 2240 2241 io = &req->qtcb->bottom.io; 2242 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 2243 req->data = scsi_cmnd; 2244 req->handler = zfcp_fsf_fcp_cmnd_handler; 2245 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 2246 req->qtcb->header.port_handle = zfcp_sdev->port->handle; 2247 io->service_class = FSF_CLASS_3; 2248 io->fcp_cmnd_length = FCP_CMND_LEN; 2249 2250 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) { 2251 io->data_block_length = scsi_cmnd->device->sector_size; 2252 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF; 2253 } 2254 2255 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction)) 2256 goto failed_scsi_cmnd; 2257 2258 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd; 2259 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0); 2260 2261 if (scsi_prot_sg_count(scsi_cmnd)) { 2262 zfcp_qdio_set_data_div(qdio, &req->qdio_req, 2263 scsi_prot_sg_count(scsi_cmnd)); 2264 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, 2265 scsi_prot_sglist(scsi_cmnd)); 2266 if (retval) 2267 goto failed_scsi_cmnd; 2268 io->prot_data_length = zfcp_qdio_real_bytes( 2269 scsi_prot_sglist(scsi_cmnd)); 2270 } 2271 2272 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, 2273 scsi_sglist(scsi_cmnd)); 2274 if (unlikely(retval)) 2275 goto failed_scsi_cmnd; 2276 2277 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req); 2278 if (zfcp_adapter_multi_buffer_active(adapter)) 2279 zfcp_qdio_set_scount(qdio, &req->qdio_req); 2280 2281 retval = zfcp_fsf_req_send(req); 2282 if (unlikely(retval)) 2283 goto failed_scsi_cmnd; 2284 2285 goto out; 2286 2287 failed_scsi_cmnd: 2288 zfcp_fsf_req_free(req); 2289 scsi_cmnd->host_scribble = NULL; 2290 out: 2291 spin_unlock_irqrestore(&qdio->req_q_lock, flags); 2292 return retval; 2293 } 2294 2295 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req) 2296 { 2297 struct fcp_resp_with_ext *fcp_rsp; 2298 struct fcp_resp_rsp_info *rsp_info; 2299 2300 zfcp_fsf_fcp_handler_common(req); 2301 2302 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp; 2303 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; 2304 2305 if ((rsp_info->rsp_code != FCP_TMF_CMPL) || 2306 (req->status & ZFCP_STATUS_FSFREQ_ERROR)) 2307 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 2308 } 2309 2310 /** 2311 * zfcp_fsf_fcp_task_mgmt - send SCSI task management command 2312 * @scmnd: SCSI command to send the task management command for 2313 * @tm_flags: unsigned byte for task management flags 2314 * Returns: on success pointer to struct fsf_req, NULL otherwise 2315 */ 2316 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd, 2317 u8 tm_flags) 2318 { 2319 struct zfcp_fsf_req *req = NULL; 2320 struct fcp_cmnd *fcp_cmnd; 2321 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device); 2322 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio; 2323 2324 if (unlikely(!(atomic_read(&zfcp_sdev->status) & 2325 ZFCP_STATUS_COMMON_UNBLOCKED))) 2326 return NULL; 2327 2328 spin_lock_irq(&qdio->req_q_lock); 2329 if (zfcp_qdio_sbal_get(qdio)) 2330 goto out; 2331 2332 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, 2333 SBAL_SFLAGS0_TYPE_WRITE, 2334 qdio->adapter->pool.scsi_req); 2335 2336 if (IS_ERR(req)) { 2337 req = NULL; 2338 goto out; 2339 } 2340 2341 req->data = scmnd; 2342 req->handler = zfcp_fsf_fcp_task_mgmt_handler; 2343 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 2344 req->qtcb->header.port_handle = zfcp_sdev->port->handle; 2345 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 2346 req->qtcb->bottom.io.service_class = FSF_CLASS_3; 2347 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN; 2348 2349 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 2350 2351 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd; 2352 zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags); 2353 2354 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT); 2355 if (!zfcp_fsf_req_send(req)) 2356 goto out; 2357 2358 zfcp_fsf_req_free(req); 2359 req = NULL; 2360 out: 2361 spin_unlock_irq(&qdio->req_q_lock); 2362 return req; 2363 } 2364 2365 /** 2366 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO 2367 * @adapter: pointer to struct zfcp_adapter 2368 * @sbal_idx: response queue index of SBAL to be processed 2369 */ 2370 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx) 2371 { 2372 struct zfcp_adapter *adapter = qdio->adapter; 2373 struct qdio_buffer *sbal = qdio->res_q[sbal_idx]; 2374 struct qdio_buffer_element *sbale; 2375 struct zfcp_fsf_req *fsf_req; 2376 unsigned long req_id; 2377 int idx; 2378 2379 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) { 2380 2381 sbale = &sbal->element[idx]; 2382 req_id = (unsigned long) sbale->addr; 2383 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id); 2384 2385 if (!fsf_req) { 2386 /* 2387 * Unknown request means that we have potentially memory 2388 * corruption and must stop the machine immediately. 2389 */ 2390 zfcp_qdio_siosl(adapter); 2391 panic("error: unknown req_id (%lx) on adapter %s.\n", 2392 req_id, dev_name(&adapter->ccw_device->dev)); 2393 } 2394 2395 fsf_req->qdio_req.sbal_response = sbal_idx; 2396 zfcp_fsf_req_complete(fsf_req); 2397 2398 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY)) 2399 break; 2400 } 2401 } 2402