1 /* 2 * This file is part of the zfcp device driver for 3 * FCP adapters for IBM System z9 and zSeries. 4 * 5 * (C) Copyright IBM Corp. 2002, 2006 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 #include "zfcp_ext.h" 23 24 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); 25 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); 26 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); 27 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); 28 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); 29 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); 30 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); 31 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); 32 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); 33 static int zfcp_fsf_send_fcp_command_task_management_handler( 34 struct zfcp_fsf_req *); 35 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); 36 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); 37 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); 38 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); 39 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); 40 static inline int zfcp_fsf_req_sbal_check( 41 unsigned long *, struct zfcp_qdio_queue *, int); 42 static inline int zfcp_use_one_sbal( 43 struct scatterlist *, int, struct scatterlist *, int); 44 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); 45 static int zfcp_fsf_req_send(struct zfcp_fsf_req *); 46 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); 47 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); 48 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); 49 static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *, 50 struct fsf_link_down_info *); 51 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); 52 53 /* association between FSF command and FSF QTCB type */ 54 static u32 fsf_qtcb_type[] = { 55 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 56 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 57 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 58 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 59 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 60 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 61 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 62 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 63 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 64 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 65 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 66 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 67 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 68 }; 69 70 static const char zfcp_act_subtable_type[5][8] = { 71 "unknown", "OS", "WWPN", "DID", "LUN" 72 }; 73 74 /****************************************************************/ 75 /*************** FSF related Functions *************************/ 76 /****************************************************************/ 77 78 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF 79 80 /* 81 * function: zfcp_fsf_req_alloc 82 * 83 * purpose: Obtains an fsf_req and potentially a qtcb (for all but 84 * unsolicited requests) via helper functions 85 * Does some initial fsf request set-up. 86 * 87 * returns: pointer to allocated fsf_req if successfull 88 * NULL otherwise 89 * 90 * locks: none 91 * 92 */ 93 static struct zfcp_fsf_req * 94 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) 95 { 96 size_t size; 97 void *ptr; 98 struct zfcp_fsf_req *fsf_req = NULL; 99 100 if (req_flags & ZFCP_REQ_NO_QTCB) 101 size = sizeof(struct zfcp_fsf_req); 102 else 103 size = sizeof(struct zfcp_fsf_req_qtcb); 104 105 if (likely(pool)) 106 ptr = mempool_alloc(pool, GFP_ATOMIC); 107 else { 108 if (req_flags & ZFCP_REQ_NO_QTCB) 109 ptr = kmalloc(size, GFP_ATOMIC); 110 else 111 ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, 112 GFP_ATOMIC); 113 } 114 115 if (unlikely(!ptr)) 116 goto out; 117 118 memset(ptr, 0, size); 119 120 if (req_flags & ZFCP_REQ_NO_QTCB) { 121 fsf_req = (struct zfcp_fsf_req *) ptr; 122 } else { 123 fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req; 124 fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb; 125 } 126 127 fsf_req->pool = pool; 128 129 out: 130 return fsf_req; 131 } 132 133 /* 134 * function: zfcp_fsf_req_free 135 * 136 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or 137 * returns it into the pool via helper functions. 138 * 139 * returns: sod all 140 * 141 * locks: none 142 */ 143 void 144 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) 145 { 146 if (likely(fsf_req->pool)) { 147 mempool_free(fsf_req, fsf_req->pool); 148 return; 149 } 150 151 if (fsf_req->qtcb) { 152 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req); 153 return; 154 } 155 156 kfree(fsf_req); 157 } 158 159 /** 160 * zfcp_fsf_req_dismiss - dismiss a single fsf request 161 */ 162 static void zfcp_fsf_req_dismiss(struct zfcp_adapter *adapter, 163 struct zfcp_fsf_req *fsf_req, 164 unsigned int counter) 165 { 166 u64 dbg_tmp[2]; 167 168 dbg_tmp[0] = (u64) atomic_read(&adapter->reqs_active); 169 dbg_tmp[1] = (u64) counter; 170 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16); 171 list_del(&fsf_req->list); 172 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 173 zfcp_fsf_req_complete(fsf_req); 174 } 175 176 /** 177 * zfcp_fsf_req_dismiss_all - dismiss all remaining fsf requests 178 */ 179 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 180 { 181 struct zfcp_fsf_req *request, *tmp; 182 unsigned long flags; 183 LIST_HEAD(remove_queue); 184 unsigned int i, counter; 185 186 spin_lock_irqsave(&adapter->req_list_lock, flags); 187 atomic_set(&adapter->reqs_active, 0); 188 for (i=0; i<REQUEST_LIST_SIZE; i++) 189 list_splice_init(&adapter->req_list[i], &remove_queue); 190 191 spin_unlock_irqrestore(&adapter->req_list_lock, flags); 192 193 counter = 0; 194 list_for_each_entry_safe(request, tmp, &remove_queue, list) { 195 zfcp_fsf_req_dismiss(adapter, request, counter); 196 counter++; 197 } 198 } 199 200 /* 201 * function: zfcp_fsf_req_complete 202 * 203 * purpose: Updates active counts and timers for openfcp-reqs 204 * May cleanup request after req_eval returns 205 * 206 * returns: 0 - success 207 * !0 - failure 208 * 209 * context: 210 */ 211 int 212 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) 213 { 214 int retval = 0; 215 int cleanup; 216 217 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { 218 ZFCP_LOG_DEBUG("Status read response received\n"); 219 /* 220 * Note: all cleanup handling is done in the callchain of 221 * the function call-chain below. 222 */ 223 zfcp_fsf_status_read_handler(fsf_req); 224 goto out; 225 } else { 226 del_timer(&fsf_req->timer); 227 zfcp_fsf_protstatus_eval(fsf_req); 228 } 229 230 /* 231 * fsf_req may be deleted due to waking up functions, so 232 * cleanup is saved here and used later 233 */ 234 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 235 cleanup = 1; 236 else 237 cleanup = 0; 238 239 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; 240 241 /* cleanup request if requested by initiator */ 242 if (likely(cleanup)) { 243 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); 244 /* 245 * lock must not be held here since it will be 246 * grabed by the called routine, too 247 */ 248 zfcp_fsf_req_free(fsf_req); 249 } else { 250 /* notify initiator waiting for the requests completion */ 251 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); 252 /* 253 * FIXME: Race! We must not access fsf_req here as it might have been 254 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED 255 * flag. It's an improbable case. But, we have the same paranoia for 256 * the cleanup flag already. 257 * Might better be handled using complete()? 258 * (setting the flag and doing wakeup ought to be atomic 259 * with regard to checking the flag as long as waitqueue is 260 * part of the to be released structure) 261 */ 262 wake_up(&fsf_req->completion_wq); 263 } 264 265 out: 266 return retval; 267 } 268 269 /* 270 * function: zfcp_fsf_protstatus_eval 271 * 272 * purpose: evaluates the QTCB of the finished FSF request 273 * and initiates appropriate actions 274 * (usually calling FSF command specific handlers) 275 * 276 * returns: 277 * 278 * context: 279 * 280 * locks: 281 */ 282 static int 283 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) 284 { 285 int retval = 0; 286 struct zfcp_adapter *adapter = fsf_req->adapter; 287 struct fsf_qtcb *qtcb = fsf_req->qtcb; 288 union fsf_prot_status_qual *prot_status_qual = 289 &qtcb->prefix.prot_status_qual; 290 291 zfcp_hba_dbf_event_fsf_response(fsf_req); 292 293 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 294 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", 295 (unsigned long) fsf_req); 296 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 297 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ 298 goto skip_protstatus; 299 } 300 301 /* log additional information provided by FSF (if any) */ 302 if (unlikely(qtcb->header.log_length)) { 303 /* do not trust them ;-) */ 304 if (qtcb->header.log_start > sizeof(struct fsf_qtcb)) { 305 ZFCP_LOG_NORMAL 306 ("bug: ULP (FSF logging) log data starts " 307 "beyond end of packet header. Ignored. " 308 "(start=%i, size=%li)\n", 309 qtcb->header.log_start, 310 sizeof(struct fsf_qtcb)); 311 goto forget_log; 312 } 313 if ((size_t) (qtcb->header.log_start + qtcb->header.log_length) 314 > sizeof(struct fsf_qtcb)) { 315 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends " 316 "beyond end of packet header. Ignored. " 317 "(start=%i, length=%i, size=%li)\n", 318 qtcb->header.log_start, 319 qtcb->header.log_length, 320 sizeof(struct fsf_qtcb)); 321 goto forget_log; 322 } 323 ZFCP_LOG_TRACE("ULP log data: \n"); 324 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 325 (char *) qtcb + qtcb->header.log_start, 326 qtcb->header.log_length); 327 } 328 forget_log: 329 330 /* evaluate FSF Protocol Status */ 331 switch (qtcb->prefix.prot_status) { 332 333 case FSF_PROT_GOOD: 334 case FSF_PROT_FSF_STATUS_PRESENTED: 335 break; 336 337 case FSF_PROT_QTCB_VERSION_ERROR: 338 ZFCP_LOG_NORMAL("error: The adapter %s contains " 339 "microcode of version 0x%x, the device driver " 340 "only supports 0x%x. Aborting.\n", 341 zfcp_get_busid_by_adapter(adapter), 342 prot_status_qual->version_error.fsf_version, 343 ZFCP_QTCB_VERSION); 344 zfcp_erp_adapter_shutdown(adapter, 0); 345 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 346 break; 347 348 case FSF_PROT_SEQ_NUMB_ERROR: 349 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " 350 "driver (0x%x) and adapter %s (0x%x). " 351 "Restarting all operations on this adapter.\n", 352 qtcb->prefix.req_seq_no, 353 zfcp_get_busid_by_adapter(adapter), 354 prot_status_qual->sequence_error.exp_req_seq_no); 355 zfcp_erp_adapter_reopen(adapter, 0); 356 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 357 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 358 break; 359 360 case FSF_PROT_UNSUPP_QTCB_TYPE: 361 ZFCP_LOG_NORMAL("error: Packet header type used by the " 362 "device driver is incompatible with " 363 "that used on adapter %s. " 364 "Stopping all operations on this adapter.\n", 365 zfcp_get_busid_by_adapter(adapter)); 366 zfcp_erp_adapter_shutdown(adapter, 0); 367 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 368 break; 369 370 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 371 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 372 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 373 &(adapter->status)); 374 break; 375 376 case FSF_PROT_DUPLICATE_REQUEST_ID: 377 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " 378 "to the adapter %s is ambiguous. " 379 "Stopping all operations on this adapter.\n", 380 *(unsigned long long*) 381 (&qtcb->bottom.support.req_handle), 382 zfcp_get_busid_by_adapter(adapter)); 383 zfcp_erp_adapter_shutdown(adapter, 0); 384 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 385 break; 386 387 case FSF_PROT_LINK_DOWN: 388 zfcp_fsf_link_down_info_eval(adapter, 389 &prot_status_qual->link_down_info); 390 zfcp_erp_adapter_reopen(adapter, 0); 391 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 392 break; 393 394 case FSF_PROT_REEST_QUEUE: 395 ZFCP_LOG_NORMAL("The local link to adapter with " 396 "%s was re-plugged. " 397 "Re-starting operations on this adapter.\n", 398 zfcp_get_busid_by_adapter(adapter)); 399 /* All ports should be marked as ready to run again */ 400 zfcp_erp_modify_adapter_status(adapter, 401 ZFCP_STATUS_COMMON_RUNNING, 402 ZFCP_SET); 403 zfcp_erp_adapter_reopen(adapter, 404 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 405 | ZFCP_STATUS_COMMON_ERP_FAILED); 406 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 407 break; 408 409 case FSF_PROT_ERROR_STATE: 410 ZFCP_LOG_NORMAL("error: The adapter %s " 411 "has entered the error state. " 412 "Restarting all operations on this " 413 "adapter.\n", 414 zfcp_get_busid_by_adapter(adapter)); 415 zfcp_erp_adapter_reopen(adapter, 0); 416 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 417 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 418 break; 419 420 default: 421 ZFCP_LOG_NORMAL("bug: Transfer protocol status information " 422 "provided by the adapter %s " 423 "is not compatible with the device driver. " 424 "Stopping all operations on this adapter. " 425 "(debug info 0x%x).\n", 426 zfcp_get_busid_by_adapter(adapter), 427 qtcb->prefix.prot_status); 428 zfcp_erp_adapter_shutdown(adapter, 0); 429 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 430 } 431 432 skip_protstatus: 433 /* 434 * always call specific handlers to give them a chance to do 435 * something meaningful even in error cases 436 */ 437 zfcp_fsf_fsfstatus_eval(fsf_req); 438 return retval; 439 } 440 441 /* 442 * function: zfcp_fsf_fsfstatus_eval 443 * 444 * purpose: evaluates FSF status of completed FSF request 445 * and acts accordingly 446 * 447 * returns: 448 */ 449 static int 450 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) 451 { 452 int retval = 0; 453 454 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 455 goto skip_fsfstatus; 456 } 457 458 /* evaluate FSF Status */ 459 switch (fsf_req->qtcb->header.fsf_status) { 460 case FSF_UNKNOWN_COMMAND: 461 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 462 "not known by the adapter %s " 463 "Stopping all operations on this adapter. " 464 "(debug info 0x%x).\n", 465 zfcp_get_busid_by_adapter(fsf_req->adapter), 466 fsf_req->qtcb->header.fsf_command); 467 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 468 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 469 break; 470 471 case FSF_FCP_RSP_AVAILABLE: 472 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " 473 "SCSI stack.\n"); 474 break; 475 476 case FSF_ADAPTER_STATUS_AVAILABLE: 477 zfcp_fsf_fsfstatus_qual_eval(fsf_req); 478 break; 479 } 480 481 skip_fsfstatus: 482 /* 483 * always call specific handlers to give them a chance to do 484 * something meaningful even in error cases 485 */ 486 zfcp_fsf_req_dispatch(fsf_req); 487 488 return retval; 489 } 490 491 /* 492 * function: zfcp_fsf_fsfstatus_qual_eval 493 * 494 * purpose: evaluates FSF status-qualifier of completed FSF request 495 * and acts accordingly 496 * 497 * returns: 498 */ 499 static int 500 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) 501 { 502 int retval = 0; 503 504 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 505 case FSF_SQ_FCP_RSP_AVAILABLE: 506 break; 507 case FSF_SQ_RETRY_IF_POSSIBLE: 508 /* The SCSI-stack may now issue retries or escalate */ 509 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 510 break; 511 case FSF_SQ_COMMAND_ABORTED: 512 /* Carry the aborted state on to upper layer */ 513 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; 514 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 515 break; 516 case FSF_SQ_NO_RECOM: 517 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a" 518 "problem on the adapter %s " 519 "Stopping all operations on this adapter. ", 520 zfcp_get_busid_by_adapter(fsf_req->adapter)); 521 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 522 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 523 break; 524 case FSF_SQ_ULP_PROGRAMMING_ERROR: 525 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " 526 "(adapter %s)\n", 527 zfcp_get_busid_by_adapter(fsf_req->adapter)); 528 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 529 break; 530 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 531 case FSF_SQ_NO_RETRY_POSSIBLE: 532 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 533 /* dealt with in the respective functions */ 534 break; 535 default: 536 ZFCP_LOG_NORMAL("bug: Additional status info could " 537 "not be interpreted properly.\n"); 538 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 539 (char *) &fsf_req->qtcb->header.fsf_status_qual, 540 sizeof (union fsf_status_qual)); 541 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 542 break; 543 } 544 545 return retval; 546 } 547 548 /** 549 * zfcp_fsf_link_down_info_eval - evaluate link down information block 550 */ 551 static void 552 zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter, 553 struct fsf_link_down_info *link_down) 554 { 555 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 556 &adapter->status)) 557 return; 558 559 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); 560 561 if (link_down == NULL) 562 goto out; 563 564 switch (link_down->error_code) { 565 case FSF_PSQ_LINK_NO_LIGHT: 566 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 567 "(no light detected)\n", 568 zfcp_get_busid_by_adapter(adapter)); 569 break; 570 case FSF_PSQ_LINK_WRAP_PLUG: 571 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 572 "(wrap plug detected)\n", 573 zfcp_get_busid_by_adapter(adapter)); 574 break; 575 case FSF_PSQ_LINK_NO_FCP: 576 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 577 "(adjacent node on link does not support FCP)\n", 578 zfcp_get_busid_by_adapter(adapter)); 579 break; 580 case FSF_PSQ_LINK_FIRMWARE_UPDATE: 581 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 582 "(firmware update in progress)\n", 583 zfcp_get_busid_by_adapter(adapter)); 584 break; 585 case FSF_PSQ_LINK_INVALID_WWPN: 586 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 587 "(duplicate or invalid WWPN detected)\n", 588 zfcp_get_busid_by_adapter(adapter)); 589 break; 590 case FSF_PSQ_LINK_NO_NPIV_SUPPORT: 591 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 592 "(no support for NPIV by Fabric)\n", 593 zfcp_get_busid_by_adapter(adapter)); 594 break; 595 case FSF_PSQ_LINK_NO_FCP_RESOURCES: 596 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 597 "(out of resource in FCP daughtercard)\n", 598 zfcp_get_busid_by_adapter(adapter)); 599 break; 600 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: 601 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 602 "(out of resource in Fabric)\n", 603 zfcp_get_busid_by_adapter(adapter)); 604 break; 605 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: 606 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 607 "(unable to Fabric login)\n", 608 zfcp_get_busid_by_adapter(adapter)); 609 break; 610 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: 611 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n", 612 zfcp_get_busid_by_adapter(adapter)); 613 break; 614 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: 615 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n", 616 zfcp_get_busid_by_adapter(adapter)); 617 break; 618 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: 619 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n", 620 zfcp_get_busid_by_adapter(adapter)); 621 break; 622 default: 623 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 624 "(warning: unknown reason code %d)\n", 625 zfcp_get_busid_by_adapter(adapter), 626 link_down->error_code); 627 } 628 629 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) 630 ZFCP_LOG_DEBUG("Debug information to link down: " 631 "primary_status=0x%02x " 632 "ioerr_code=0x%02x " 633 "action_code=0x%02x " 634 "reason_code=0x%02x " 635 "explanation_code=0x%02x " 636 "vendor_specific_code=0x%02x\n", 637 link_down->primary_status, 638 link_down->ioerr_code, 639 link_down->action_code, 640 link_down->reason_code, 641 link_down->explanation_code, 642 link_down->vendor_specific_code); 643 644 out: 645 zfcp_erp_adapter_failed(adapter); 646 } 647 648 /* 649 * function: zfcp_fsf_req_dispatch 650 * 651 * purpose: calls the appropriate command specific handler 652 * 653 * returns: 654 */ 655 static int 656 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) 657 { 658 struct zfcp_erp_action *erp_action = fsf_req->erp_action; 659 struct zfcp_adapter *adapter = fsf_req->adapter; 660 int retval = 0; 661 662 663 switch (fsf_req->fsf_command) { 664 665 case FSF_QTCB_FCP_CMND: 666 zfcp_fsf_send_fcp_command_handler(fsf_req); 667 break; 668 669 case FSF_QTCB_ABORT_FCP_CMND: 670 zfcp_fsf_abort_fcp_command_handler(fsf_req); 671 break; 672 673 case FSF_QTCB_SEND_GENERIC: 674 zfcp_fsf_send_ct_handler(fsf_req); 675 break; 676 677 case FSF_QTCB_OPEN_PORT_WITH_DID: 678 zfcp_fsf_open_port_handler(fsf_req); 679 break; 680 681 case FSF_QTCB_OPEN_LUN: 682 zfcp_fsf_open_unit_handler(fsf_req); 683 break; 684 685 case FSF_QTCB_CLOSE_LUN: 686 zfcp_fsf_close_unit_handler(fsf_req); 687 break; 688 689 case FSF_QTCB_CLOSE_PORT: 690 zfcp_fsf_close_port_handler(fsf_req); 691 break; 692 693 case FSF_QTCB_CLOSE_PHYSICAL_PORT: 694 zfcp_fsf_close_physical_port_handler(fsf_req); 695 break; 696 697 case FSF_QTCB_EXCHANGE_CONFIG_DATA: 698 zfcp_fsf_exchange_config_data_handler(fsf_req); 699 break; 700 701 case FSF_QTCB_EXCHANGE_PORT_DATA: 702 zfcp_fsf_exchange_port_data_handler(fsf_req); 703 break; 704 705 case FSF_QTCB_SEND_ELS: 706 zfcp_fsf_send_els_handler(fsf_req); 707 break; 708 709 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 710 zfcp_fsf_control_file_handler(fsf_req); 711 break; 712 713 case FSF_QTCB_UPLOAD_CONTROL_FILE: 714 zfcp_fsf_control_file_handler(fsf_req); 715 break; 716 717 default: 718 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 719 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 720 "not supported by the adapter %s\n", 721 zfcp_get_busid_by_adapter(adapter)); 722 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) 723 ZFCP_LOG_NORMAL 724 ("bug: Command issued by the device driver differs " 725 "from the command returned by the adapter %s " 726 "(debug info 0x%x, 0x%x).\n", 727 zfcp_get_busid_by_adapter(adapter), 728 fsf_req->fsf_command, 729 fsf_req->qtcb->header.fsf_command); 730 } 731 732 if (!erp_action) 733 return retval; 734 735 zfcp_erp_async_handler(erp_action, 0); 736 737 return retval; 738 } 739 740 /* 741 * function: zfcp_fsf_status_read 742 * 743 * purpose: initiates a Status Read command at the specified adapter 744 * 745 * returns: 746 */ 747 int 748 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) 749 { 750 struct zfcp_fsf_req *fsf_req; 751 struct fsf_status_read_buffer *status_buffer; 752 unsigned long lock_flags; 753 volatile struct qdio_buffer_element *sbale; 754 int retval = 0; 755 756 /* setup new FSF request */ 757 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 758 req_flags | ZFCP_REQ_NO_QTCB, 759 adapter->pool.fsf_req_status_read, 760 &lock_flags, &fsf_req); 761 if (retval < 0) { 762 ZFCP_LOG_INFO("error: Could not create unsolicited status " 763 "buffer for adapter %s.\n", 764 zfcp_get_busid_by_adapter(adapter)); 765 goto failed_req_create; 766 } 767 768 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 769 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; 770 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; 771 fsf_req->sbale_curr = 2; 772 773 status_buffer = 774 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); 775 if (!status_buffer) { 776 ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); 777 goto failed_buf; 778 } 779 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); 780 fsf_req->data = (unsigned long) status_buffer; 781 782 /* insert pointer to respective buffer */ 783 sbale = zfcp_qdio_sbale_curr(fsf_req); 784 sbale->addr = (void *) status_buffer; 785 sbale->length = sizeof(struct fsf_status_read_buffer); 786 787 retval = zfcp_fsf_req_send(fsf_req); 788 if (retval) { 789 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " 790 "environment.\n"); 791 goto failed_req_send; 792 } 793 794 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", 795 zfcp_get_busid_by_adapter(adapter)); 796 goto out; 797 798 failed_req_send: 799 mempool_free(status_buffer, adapter->pool.data_status_read); 800 801 failed_buf: 802 zfcp_fsf_req_free(fsf_req); 803 failed_req_create: 804 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); 805 out: 806 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 807 return retval; 808 } 809 810 static int 811 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) 812 { 813 struct fsf_status_read_buffer *status_buffer; 814 struct zfcp_adapter *adapter; 815 struct zfcp_port *port; 816 unsigned long flags; 817 818 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; 819 adapter = fsf_req->adapter; 820 821 read_lock_irqsave(&zfcp_data.config_lock, flags); 822 list_for_each_entry(port, &adapter->port_list_head, list) 823 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) 824 break; 825 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 826 827 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { 828 ZFCP_LOG_NORMAL("bug: Reopen port indication received for" 829 "nonexisting port with d_id 0x%08x on " 830 "adapter %s. Ignored.\n", 831 status_buffer->d_id & ZFCP_DID_MASK, 832 zfcp_get_busid_by_adapter(adapter)); 833 goto out; 834 } 835 836 switch (status_buffer->status_subtype) { 837 838 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: 839 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:"); 840 zfcp_erp_port_reopen(port, 0); 841 break; 842 843 case FSF_STATUS_READ_SUB_ERROR_PORT: 844 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:"); 845 zfcp_erp_port_shutdown(port, 0); 846 break; 847 848 default: 849 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:"); 850 debug_exception(adapter->erp_dbf, 0, 851 &status_buffer->status_subtype, sizeof (u32)); 852 ZFCP_LOG_NORMAL("bug: Undefined status subtype received " 853 "for a reopen indication on port with " 854 "d_id 0x%08x on the adapter %s. " 855 "Ignored. (debug info 0x%x)\n", 856 status_buffer->d_id, 857 zfcp_get_busid_by_adapter(adapter), 858 status_buffer->status_subtype); 859 } 860 out: 861 return 0; 862 } 863 864 /* 865 * function: zfcp_fsf_status_read_handler 866 * 867 * purpose: is called for finished Open Port command 868 * 869 * returns: 870 */ 871 static int 872 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) 873 { 874 int retval = 0; 875 struct zfcp_adapter *adapter = fsf_req->adapter; 876 struct fsf_status_read_buffer *status_buffer = 877 (struct fsf_status_read_buffer *) fsf_req->data; 878 struct fsf_bit_error_payload *fsf_bit_error; 879 880 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 881 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); 882 mempool_free(status_buffer, adapter->pool.data_status_read); 883 zfcp_fsf_req_free(fsf_req); 884 goto out; 885 } 886 887 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); 888 889 switch (status_buffer->status_type) { 890 891 case FSF_STATUS_READ_PORT_CLOSED: 892 zfcp_fsf_status_read_port_closed(fsf_req); 893 break; 894 895 case FSF_STATUS_READ_INCOMING_ELS: 896 zfcp_fsf_incoming_els(fsf_req); 897 break; 898 899 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 900 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", 901 zfcp_get_busid_by_adapter(adapter)); 902 break; 903 904 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 905 fsf_bit_error = (struct fsf_bit_error_payload *) 906 status_buffer->payload; 907 ZFCP_LOG_NORMAL("Warning: bit error threshold data " 908 "received (adapter %s, " 909 "link failures = %i, loss of sync errors = %i, " 910 "loss of signal errors = %i, " 911 "primitive sequence errors = %i, " 912 "invalid transmission word errors = %i, " 913 "CRC errors = %i)\n", 914 zfcp_get_busid_by_adapter(adapter), 915 fsf_bit_error->link_failure_error_count, 916 fsf_bit_error->loss_of_sync_error_count, 917 fsf_bit_error->loss_of_signal_error_count, 918 fsf_bit_error->primitive_sequence_error_count, 919 fsf_bit_error->invalid_transmission_word_error_count, 920 fsf_bit_error->crc_error_count); 921 ZFCP_LOG_INFO("Additional bit error threshold data " 922 "(adapter %s, " 923 "primitive sequence event time-outs = %i, " 924 "elastic buffer overrun errors = %i, " 925 "advertised receive buffer-to-buffer credit = %i, " 926 "current receice buffer-to-buffer credit = %i, " 927 "advertised transmit buffer-to-buffer credit = %i, " 928 "current transmit buffer-to-buffer credit = %i)\n", 929 zfcp_get_busid_by_adapter(adapter), 930 fsf_bit_error->primitive_sequence_event_timeout_count, 931 fsf_bit_error->elastic_buffer_overrun_error_count, 932 fsf_bit_error->advertised_receive_b2b_credit, 933 fsf_bit_error->current_receive_b2b_credit, 934 fsf_bit_error->advertised_transmit_b2b_credit, 935 fsf_bit_error->current_transmit_b2b_credit); 936 break; 937 938 case FSF_STATUS_READ_LINK_DOWN: 939 switch (status_buffer->status_subtype) { 940 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: 941 ZFCP_LOG_INFO("Physical link to adapter %s is down\n", 942 zfcp_get_busid_by_adapter(adapter)); 943 zfcp_fsf_link_down_info_eval(adapter, 944 (struct fsf_link_down_info *) 945 &status_buffer->payload); 946 break; 947 case FSF_STATUS_READ_SUB_FDISC_FAILED: 948 ZFCP_LOG_INFO("Local link to adapter %s is down " 949 "due to failed FDISC login\n", 950 zfcp_get_busid_by_adapter(adapter)); 951 zfcp_fsf_link_down_info_eval(adapter, 952 (struct fsf_link_down_info *) 953 &status_buffer->payload); 954 break; 955 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: 956 ZFCP_LOG_INFO("Local link to adapter %s is down " 957 "due to firmware update on adapter\n", 958 zfcp_get_busid_by_adapter(adapter)); 959 zfcp_fsf_link_down_info_eval(adapter, NULL); 960 break; 961 default: 962 ZFCP_LOG_INFO("Local link to adapter %s is down " 963 "due to unknown reason\n", 964 zfcp_get_busid_by_adapter(adapter)); 965 zfcp_fsf_link_down_info_eval(adapter, NULL); 966 }; 967 break; 968 969 case FSF_STATUS_READ_LINK_UP: 970 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. " 971 "Restarting operations on this adapter\n", 972 zfcp_get_busid_by_adapter(adapter)); 973 /* All ports should be marked as ready to run again */ 974 zfcp_erp_modify_adapter_status(adapter, 975 ZFCP_STATUS_COMMON_RUNNING, 976 ZFCP_SET); 977 zfcp_erp_adapter_reopen(adapter, 978 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 979 | ZFCP_STATUS_COMMON_ERP_FAILED); 980 break; 981 982 case FSF_STATUS_READ_NOTIFICATION_LOST: 983 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: " 984 "adapter %s%s%s%s%s%s%s%s%s\n", 985 zfcp_get_busid_by_adapter(adapter), 986 (status_buffer->status_subtype & 987 FSF_STATUS_READ_SUB_INCOMING_ELS) ? 988 ", incoming ELS" : "", 989 (status_buffer->status_subtype & 990 FSF_STATUS_READ_SUB_SENSE_DATA) ? 991 ", sense data" : "", 992 (status_buffer->status_subtype & 993 FSF_STATUS_READ_SUB_LINK_STATUS) ? 994 ", link status change" : "", 995 (status_buffer->status_subtype & 996 FSF_STATUS_READ_SUB_PORT_CLOSED) ? 997 ", port close" : "", 998 (status_buffer->status_subtype & 999 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ? 1000 ", bit error exception" : "", 1001 (status_buffer->status_subtype & 1002 FSF_STATUS_READ_SUB_ACT_UPDATED) ? 1003 ", ACT update" : "", 1004 (status_buffer->status_subtype & 1005 FSF_STATUS_READ_SUB_ACT_HARDENED) ? 1006 ", ACT hardening" : "", 1007 (status_buffer->status_subtype & 1008 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ? 1009 ", adapter feature change" : ""); 1010 1011 if (status_buffer->status_subtype & 1012 FSF_STATUS_READ_SUB_ACT_UPDATED) 1013 zfcp_erp_adapter_access_changed(adapter); 1014 break; 1015 1016 case FSF_STATUS_READ_CFDC_UPDATED: 1017 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n", 1018 zfcp_get_busid_by_adapter(adapter)); 1019 zfcp_erp_adapter_access_changed(adapter); 1020 break; 1021 1022 case FSF_STATUS_READ_CFDC_HARDENED: 1023 switch (status_buffer->status_subtype) { 1024 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: 1025 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n", 1026 zfcp_get_busid_by_adapter(adapter)); 1027 break; 1028 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: 1029 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied " 1030 "to the secondary SE\n", 1031 zfcp_get_busid_by_adapter(adapter)); 1032 break; 1033 default: 1034 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n", 1035 zfcp_get_busid_by_adapter(adapter)); 1036 } 1037 break; 1038 1039 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: 1040 debug_text_event(adapter->erp_dbf, 2, "unsol_features:"); 1041 ZFCP_LOG_INFO("List of supported features on adapter %s has " 1042 "been changed from 0x%08X to 0x%08X\n", 1043 zfcp_get_busid_by_adapter(adapter), 1044 *(u32*) (status_buffer->payload + 4), 1045 *(u32*) (status_buffer->payload)); 1046 adapter->adapter_features = *(u32*) status_buffer->payload; 1047 break; 1048 1049 default: 1050 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown " 1051 "type was received (debug info 0x%x)\n", 1052 status_buffer->status_type); 1053 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", 1054 status_buffer); 1055 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1056 (char *) status_buffer, 1057 sizeof (struct fsf_status_read_buffer)); 1058 break; 1059 } 1060 mempool_free(status_buffer, adapter->pool.data_status_read); 1061 zfcp_fsf_req_free(fsf_req); 1062 /* 1063 * recycle buffer and start new request repeat until outbound 1064 * queue is empty or adapter shutdown is requested 1065 */ 1066 /* 1067 * FIXME(qdio): 1068 * we may wait in the req_create for 5s during shutdown, so 1069 * qdio_cleanup will have to wait at least that long before returning 1070 * with failure to allow us a proper cleanup under all circumstances 1071 */ 1072 /* 1073 * FIXME: 1074 * allocation failure possible? (Is this code needed?) 1075 */ 1076 retval = zfcp_fsf_status_read(adapter, 0); 1077 if (retval < 0) { 1078 ZFCP_LOG_INFO("Failed to create unsolicited status read " 1079 "request for the adapter %s.\n", 1080 zfcp_get_busid_by_adapter(adapter)); 1081 /* temporary fix to avoid status read buffer shortage */ 1082 adapter->status_read_failed++; 1083 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) 1084 < ZFCP_STATUS_READ_FAILED_THRESHOLD) { 1085 ZFCP_LOG_INFO("restart adapter %s due to status read " 1086 "buffer shortage\n", 1087 zfcp_get_busid_by_adapter(adapter)); 1088 zfcp_erp_adapter_reopen(adapter, 0); 1089 } 1090 } 1091 out: 1092 return retval; 1093 } 1094 1095 /* 1096 * function: zfcp_fsf_abort_fcp_command 1097 * 1098 * purpose: tells FSF to abort a running SCSI command 1099 * 1100 * returns: address of initiated FSF request 1101 * NULL - request could not be initiated 1102 * 1103 * FIXME(design): should be watched by a timeout !!! 1104 * FIXME(design) shouldn't this be modified to return an int 1105 * also...don't know how though 1106 */ 1107 struct zfcp_fsf_req * 1108 zfcp_fsf_abort_fcp_command(unsigned long old_req_id, 1109 struct zfcp_adapter *adapter, 1110 struct zfcp_unit *unit, int req_flags) 1111 { 1112 volatile struct qdio_buffer_element *sbale; 1113 struct zfcp_fsf_req *fsf_req = NULL; 1114 unsigned long lock_flags; 1115 int retval = 0; 1116 1117 /* setup new FSF request */ 1118 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, 1119 req_flags, adapter->pool.fsf_req_abort, 1120 &lock_flags, &fsf_req); 1121 if (retval < 0) { 1122 ZFCP_LOG_INFO("error: Failed to create an abort command " 1123 "request for lun 0x%016Lx on port 0x%016Lx " 1124 "on adapter %s.\n", 1125 unit->fcp_lun, 1126 unit->port->wwpn, 1127 zfcp_get_busid_by_adapter(adapter)); 1128 goto out; 1129 } 1130 1131 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1132 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1133 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1134 1135 fsf_req->data = (unsigned long) unit; 1136 1137 /* set handles of unit and its parent port in QTCB */ 1138 fsf_req->qtcb->header.lun_handle = unit->handle; 1139 fsf_req->qtcb->header.port_handle = unit->port->handle; 1140 1141 /* set handle of request which should be aborted */ 1142 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; 1143 1144 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); 1145 retval = zfcp_fsf_req_send(fsf_req); 1146 if (retval) { 1147 ZFCP_LOG_INFO("error: Failed to send abort command request " 1148 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 1149 zfcp_get_busid_by_adapter(adapter), 1150 unit->port->wwpn, unit->fcp_lun); 1151 zfcp_fsf_req_free(fsf_req); 1152 fsf_req = NULL; 1153 goto out; 1154 } 1155 1156 ZFCP_LOG_DEBUG("Abort FCP Command request initiated " 1157 "(adapter%s, port d_id=0x%08x, " 1158 "unit x%016Lx, old_req_id=0x%lx)\n", 1159 zfcp_get_busid_by_adapter(adapter), 1160 unit->port->d_id, 1161 unit->fcp_lun, old_req_id); 1162 out: 1163 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 1164 return fsf_req; 1165 } 1166 1167 /* 1168 * function: zfcp_fsf_abort_fcp_command_handler 1169 * 1170 * purpose: is called for finished Abort FCP Command request 1171 * 1172 * returns: 1173 */ 1174 static int 1175 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) 1176 { 1177 int retval = -EINVAL; 1178 struct zfcp_unit *unit; 1179 unsigned char status_qual = 1180 new_fsf_req->qtcb->header.fsf_status_qual.word[0]; 1181 1182 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1183 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ 1184 goto skip_fsfstatus; 1185 } 1186 1187 unit = (struct zfcp_unit *) new_fsf_req->data; 1188 1189 /* evaluate FSF status in QTCB */ 1190 switch (new_fsf_req->qtcb->header.fsf_status) { 1191 1192 case FSF_PORT_HANDLE_NOT_VALID: 1193 if (status_qual >> 4 != status_qual % 0xf) { 1194 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1195 "fsf_s_phand_nv0"); 1196 /* 1197 * In this case a command that was sent prior to a port 1198 * reopen was aborted (handles are different). This is 1199 * fine. 1200 */ 1201 } else { 1202 ZFCP_LOG_INFO("Temporary port identifier 0x%x for " 1203 "port 0x%016Lx on adapter %s invalid. " 1204 "This may happen occasionally.\n", 1205 unit->port->handle, 1206 unit->port->wwpn, 1207 zfcp_get_busid_by_unit(unit)); 1208 ZFCP_LOG_INFO("status qualifier:\n"); 1209 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1210 (char *) &new_fsf_req->qtcb->header. 1211 fsf_status_qual, 1212 sizeof (union fsf_status_qual)); 1213 /* Let's hope this sorts out the mess */ 1214 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1215 "fsf_s_phand_nv1"); 1216 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 1217 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1218 } 1219 break; 1220 1221 case FSF_LUN_HANDLE_NOT_VALID: 1222 if (status_qual >> 4 != status_qual % 0xf) { 1223 /* 2 */ 1224 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1225 "fsf_s_lhand_nv0"); 1226 /* 1227 * In this case a command that was sent prior to a unit 1228 * reopen was aborted (handles are different). 1229 * This is fine. 1230 */ 1231 } else { 1232 ZFCP_LOG_INFO 1233 ("Warning: Temporary LUN identifier 0x%x of LUN " 1234 "0x%016Lx on port 0x%016Lx on adapter %s is " 1235 "invalid. This may happen in rare cases. " 1236 "Trying to re-establish link.\n", 1237 unit->handle, 1238 unit->fcp_lun, 1239 unit->port->wwpn, 1240 zfcp_get_busid_by_unit(unit)); 1241 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 1242 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1243 (char *) &new_fsf_req->qtcb->header. 1244 fsf_status_qual, 1245 sizeof (union fsf_status_qual)); 1246 /* Let's hope this sorts out the mess */ 1247 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1248 "fsf_s_lhand_nv1"); 1249 zfcp_erp_port_reopen(unit->port, 0); 1250 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1251 } 1252 break; 1253 1254 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 1255 retval = 0; 1256 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1257 "fsf_s_no_exist"); 1258 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 1259 break; 1260 1261 case FSF_PORT_BOXED: 1262 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " 1263 "be reopened\n", unit->port->wwpn, 1264 zfcp_get_busid_by_unit(unit)); 1265 debug_text_event(new_fsf_req->adapter->erp_dbf, 2, 1266 "fsf_s_pboxed"); 1267 zfcp_erp_port_boxed(unit->port); 1268 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1269 | ZFCP_STATUS_FSFREQ_RETRY; 1270 break; 1271 1272 case FSF_LUN_BOXED: 1273 ZFCP_LOG_INFO( 1274 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " 1275 "to be reopened\n", 1276 unit->fcp_lun, unit->port->wwpn, 1277 zfcp_get_busid_by_unit(unit)); 1278 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 1279 zfcp_erp_unit_boxed(unit); 1280 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1281 | ZFCP_STATUS_FSFREQ_RETRY; 1282 break; 1283 1284 case FSF_ADAPTER_STATUS_AVAILABLE: 1285 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { 1286 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1287 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1288 "fsf_sq_ltest"); 1289 zfcp_test_link(unit->port); 1290 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1291 break; 1292 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1293 /* SCSI stack will escalate */ 1294 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1295 "fsf_sq_ulp"); 1296 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1297 break; 1298 default: 1299 ZFCP_LOG_NORMAL 1300 ("bug: Wrong status qualifier 0x%x arrived.\n", 1301 new_fsf_req->qtcb->header.fsf_status_qual.word[0]); 1302 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1303 "fsf_sq_inval:"); 1304 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1305 &new_fsf_req->qtcb->header. 1306 fsf_status_qual.word[0], sizeof (u32)); 1307 break; 1308 } 1309 break; 1310 1311 case FSF_GOOD: 1312 retval = 0; 1313 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 1314 break; 1315 1316 default: 1317 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1318 "(debug info 0x%x)\n", 1319 new_fsf_req->qtcb->header.fsf_status); 1320 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1321 "fsf_s_inval:"); 1322 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1323 &new_fsf_req->qtcb->header.fsf_status, 1324 sizeof (u32)); 1325 break; 1326 } 1327 skip_fsfstatus: 1328 return retval; 1329 } 1330 1331 /** 1332 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into 1333 * one SBALE 1334 * Two scatter-gather lists are passed, one for the reqeust and one for the 1335 * response. 1336 */ 1337 static inline int 1338 zfcp_use_one_sbal(struct scatterlist *req, int req_count, 1339 struct scatterlist *resp, int resp_count) 1340 { 1341 return ((req_count == 1) && 1342 (resp_count == 1) && 1343 (((unsigned long) zfcp_sg_to_address(&req[0]) & 1344 PAGE_MASK) == 1345 ((unsigned long) (zfcp_sg_to_address(&req[0]) + 1346 req[0].length - 1) & PAGE_MASK)) && 1347 (((unsigned long) zfcp_sg_to_address(&resp[0]) & 1348 PAGE_MASK) == 1349 ((unsigned long) (zfcp_sg_to_address(&resp[0]) + 1350 resp[0].length - 1) & PAGE_MASK))); 1351 } 1352 1353 /** 1354 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1355 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for 1356 * the request 1357 * @pool: pointer to memory pool, if non-null this pool is used to allocate 1358 * a struct zfcp_fsf_req 1359 * @erp_action: pointer to erp_action, if non-null the Generic Service request 1360 * is sent within error recovery 1361 */ 1362 int 1363 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, 1364 struct zfcp_erp_action *erp_action) 1365 { 1366 volatile struct qdio_buffer_element *sbale; 1367 struct zfcp_port *port; 1368 struct zfcp_adapter *adapter; 1369 struct zfcp_fsf_req *fsf_req; 1370 unsigned long lock_flags; 1371 int bytes; 1372 int ret = 0; 1373 1374 port = ct->port; 1375 adapter = port->adapter; 1376 1377 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, 1378 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 1379 pool, &lock_flags, &fsf_req); 1380 if (ret < 0) { 1381 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " 1382 "adapter: %s\n", 1383 zfcp_get_busid_by_adapter(adapter)); 1384 goto failed_req; 1385 } 1386 1387 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1388 if (zfcp_use_one_sbal(ct->req, ct->req_count, 1389 ct->resp, ct->resp_count)){ 1390 /* both request buffer and response buffer 1391 fit into one sbale each */ 1392 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1393 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); 1394 sbale[2].length = ct->req[0].length; 1395 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); 1396 sbale[3].length = ct->resp[0].length; 1397 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1398 } else if (adapter->adapter_features & 1399 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1400 /* try to use chained SBALs */ 1401 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1402 SBAL_FLAGS0_TYPE_WRITE_READ, 1403 ct->req, ct->req_count, 1404 ZFCP_MAX_SBALS_PER_CT_REQ); 1405 if (bytes <= 0) { 1406 ZFCP_LOG_INFO("error: creation of CT request failed " 1407 "on adapter %s\n", 1408 zfcp_get_busid_by_adapter(adapter)); 1409 if (bytes == 0) 1410 ret = -ENOMEM; 1411 else 1412 ret = bytes; 1413 1414 goto failed_send; 1415 } 1416 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1417 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1418 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1419 SBAL_FLAGS0_TYPE_WRITE_READ, 1420 ct->resp, ct->resp_count, 1421 ZFCP_MAX_SBALS_PER_CT_REQ); 1422 if (bytes <= 0) { 1423 ZFCP_LOG_INFO("error: creation of CT request failed " 1424 "on adapter %s\n", 1425 zfcp_get_busid_by_adapter(adapter)); 1426 if (bytes == 0) 1427 ret = -ENOMEM; 1428 else 1429 ret = bytes; 1430 1431 goto failed_send; 1432 } 1433 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1434 } else { 1435 /* reject send generic request */ 1436 ZFCP_LOG_INFO( 1437 "error: microcode does not support chained SBALs," 1438 "CT request too big (adapter %s)\n", 1439 zfcp_get_busid_by_adapter(adapter)); 1440 ret = -EOPNOTSUPP; 1441 goto failed_send; 1442 } 1443 1444 /* settings in QTCB */ 1445 fsf_req->qtcb->header.port_handle = port->handle; 1446 fsf_req->qtcb->bottom.support.service_class = 1447 ZFCP_FC_SERVICE_CLASS_DEFAULT; 1448 fsf_req->qtcb->bottom.support.timeout = ct->timeout; 1449 fsf_req->data = (unsigned long) ct; 1450 1451 zfcp_san_dbf_event_ct_request(fsf_req); 1452 1453 if (erp_action) { 1454 erp_action->fsf_req = fsf_req; 1455 fsf_req->erp_action = erp_action; 1456 zfcp_erp_start_timer(fsf_req); 1457 } else 1458 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 1459 1460 ret = zfcp_fsf_req_send(fsf_req); 1461 if (ret) { 1462 ZFCP_LOG_DEBUG("error: initiation of CT request failed " 1463 "(adapter %s, port 0x%016Lx)\n", 1464 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1465 goto failed_send; 1466 } 1467 1468 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", 1469 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1470 goto out; 1471 1472 failed_send: 1473 zfcp_fsf_req_free(fsf_req); 1474 if (erp_action != NULL) { 1475 erp_action->fsf_req = NULL; 1476 } 1477 failed_req: 1478 out: 1479 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1480 lock_flags); 1481 return ret; 1482 } 1483 1484 /** 1485 * zfcp_fsf_send_ct_handler - handler for Generic Service requests 1486 * @fsf_req: pointer to struct zfcp_fsf_req 1487 * 1488 * Data specific for the Generic Service request is passed using 1489 * fsf_req->data. There we find the pointer to struct zfcp_send_ct. 1490 * Usually a specific handler for the CT request is called which is 1491 * found in this structure. 1492 */ 1493 static int 1494 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) 1495 { 1496 struct zfcp_port *port; 1497 struct zfcp_adapter *adapter; 1498 struct zfcp_send_ct *send_ct; 1499 struct fsf_qtcb_header *header; 1500 struct fsf_qtcb_bottom_support *bottom; 1501 int retval = -EINVAL; 1502 u16 subtable, rule, counter; 1503 1504 adapter = fsf_req->adapter; 1505 send_ct = (struct zfcp_send_ct *) fsf_req->data; 1506 port = send_ct->port; 1507 header = &fsf_req->qtcb->header; 1508 bottom = &fsf_req->qtcb->bottom.support; 1509 1510 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1511 goto skip_fsfstatus; 1512 1513 /* evaluate FSF status in QTCB */ 1514 switch (header->fsf_status) { 1515 1516 case FSF_GOOD: 1517 zfcp_san_dbf_event_ct_response(fsf_req); 1518 retval = 0; 1519 break; 1520 1521 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1522 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1523 "class %d.\n", 1524 zfcp_get_busid_by_port(port), 1525 ZFCP_FC_SERVICE_CLASS_DEFAULT); 1526 /* stop operation for this adapter */ 1527 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1528 zfcp_erp_adapter_shutdown(adapter, 0); 1529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1530 break; 1531 1532 case FSF_ADAPTER_STATUS_AVAILABLE: 1533 switch (header->fsf_status_qual.word[0]){ 1534 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1535 /* reopening link to port */ 1536 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1537 zfcp_test_link(port); 1538 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1539 break; 1540 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1541 /* ERP strategy will escalate */ 1542 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1543 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1544 break; 1545 default: 1546 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " 1547 "arrived.\n", 1548 header->fsf_status_qual.word[0]); 1549 break; 1550 } 1551 break; 1552 1553 case FSF_ACCESS_DENIED: 1554 ZFCP_LOG_NORMAL("access denied, cannot send generic service " 1555 "command (adapter %s, port d_id=0x%08x)\n", 1556 zfcp_get_busid_by_port(port), port->d_id); 1557 for (counter = 0; counter < 2; counter++) { 1558 subtable = header->fsf_status_qual.halfword[counter * 2]; 1559 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1560 switch (subtable) { 1561 case FSF_SQ_CFDC_SUBTABLE_OS: 1562 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1563 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1564 case FSF_SQ_CFDC_SUBTABLE_LUN: 1565 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1566 zfcp_act_subtable_type[subtable], rule); 1567 break; 1568 } 1569 } 1570 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1571 zfcp_erp_port_access_denied(port); 1572 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1573 break; 1574 1575 case FSF_GENERIC_COMMAND_REJECTED: 1576 ZFCP_LOG_INFO("generic service command rejected " 1577 "(adapter %s, port d_id=0x%08x)\n", 1578 zfcp_get_busid_by_port(port), port->d_id); 1579 ZFCP_LOG_INFO("status qualifier:\n"); 1580 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1581 (char *) &header->fsf_status_qual, 1582 sizeof (union fsf_status_qual)); 1583 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej"); 1584 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1585 break; 1586 1587 case FSF_PORT_HANDLE_NOT_VALID: 1588 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " 1589 "0x%016Lx on adapter %s invalid. This may " 1590 "happen occasionally.\n", port->handle, 1591 port->wwpn, zfcp_get_busid_by_port(port)); 1592 ZFCP_LOG_INFO("status qualifier:\n"); 1593 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1594 (char *) &header->fsf_status_qual, 1595 sizeof (union fsf_status_qual)); 1596 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv"); 1597 zfcp_erp_adapter_reopen(adapter, 0); 1598 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1599 break; 1600 1601 case FSF_PORT_BOXED: 1602 ZFCP_LOG_INFO("port needs to be reopened " 1603 "(adapter %s, port d_id=0x%08x)\n", 1604 zfcp_get_busid_by_port(port), port->d_id); 1605 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 1606 zfcp_erp_port_boxed(port); 1607 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1608 | ZFCP_STATUS_FSFREQ_RETRY; 1609 break; 1610 1611 /* following states should never occure, all cases avoided 1612 in zfcp_fsf_send_ct - but who knows ... */ 1613 case FSF_PAYLOAD_SIZE_MISMATCH: 1614 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " 1615 "req_buf_length=%d, resp_buf_length=%d)\n", 1616 zfcp_get_busid_by_adapter(adapter), 1617 bottom->req_buf_length, bottom->resp_buf_length); 1618 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1619 break; 1620 case FSF_REQUEST_SIZE_TOO_LARGE: 1621 ZFCP_LOG_INFO("request size too large (adapter: %s, " 1622 "req_buf_length=%d)\n", 1623 zfcp_get_busid_by_adapter(adapter), 1624 bottom->req_buf_length); 1625 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1626 break; 1627 case FSF_RESPONSE_SIZE_TOO_LARGE: 1628 ZFCP_LOG_INFO("response size too large (adapter: %s, " 1629 "resp_buf_length=%d)\n", 1630 zfcp_get_busid_by_adapter(adapter), 1631 bottom->resp_buf_length); 1632 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1633 break; 1634 case FSF_SBAL_MISMATCH: 1635 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1636 "resp_buf_length=%d)\n", 1637 zfcp_get_busid_by_adapter(adapter), 1638 bottom->req_buf_length, bottom->resp_buf_length); 1639 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1640 break; 1641 1642 default: 1643 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1644 "(debug info 0x%x)\n", header->fsf_status); 1645 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); 1646 debug_exception(adapter->erp_dbf, 0, 1647 &header->fsf_status_qual.word[0], sizeof (u32)); 1648 break; 1649 } 1650 1651 skip_fsfstatus: 1652 send_ct->status = retval; 1653 1654 if (send_ct->handler != NULL) 1655 send_ct->handler(send_ct->handler_data); 1656 1657 return retval; 1658 } 1659 1660 /** 1661 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1662 * @els: pointer to struct zfcp_send_els which contains all needed data for 1663 * the command. 1664 */ 1665 int 1666 zfcp_fsf_send_els(struct zfcp_send_els *els) 1667 { 1668 volatile struct qdio_buffer_element *sbale; 1669 struct zfcp_fsf_req *fsf_req; 1670 u32 d_id; 1671 struct zfcp_adapter *adapter; 1672 unsigned long lock_flags; 1673 int bytes; 1674 int ret = 0; 1675 1676 d_id = els->d_id; 1677 adapter = els->adapter; 1678 1679 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, 1680 ZFCP_REQ_AUTO_CLEANUP, 1681 NULL, &lock_flags, &fsf_req); 1682 if (ret < 0) { 1683 ZFCP_LOG_INFO("error: creation of ELS request failed " 1684 "(adapter %s, port d_id: 0x%08x)\n", 1685 zfcp_get_busid_by_adapter(adapter), d_id); 1686 goto failed_req; 1687 } 1688 1689 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1690 if (zfcp_use_one_sbal(els->req, els->req_count, 1691 els->resp, els->resp_count)){ 1692 /* both request buffer and response buffer 1693 fit into one sbale each */ 1694 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1695 sbale[2].addr = zfcp_sg_to_address(&els->req[0]); 1696 sbale[2].length = els->req[0].length; 1697 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); 1698 sbale[3].length = els->resp[0].length; 1699 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1700 } else if (adapter->adapter_features & 1701 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1702 /* try to use chained SBALs */ 1703 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1704 SBAL_FLAGS0_TYPE_WRITE_READ, 1705 els->req, els->req_count, 1706 ZFCP_MAX_SBALS_PER_ELS_REQ); 1707 if (bytes <= 0) { 1708 ZFCP_LOG_INFO("error: creation of ELS request failed " 1709 "(adapter %s, port d_id: 0x%08x)\n", 1710 zfcp_get_busid_by_adapter(adapter), d_id); 1711 if (bytes == 0) { 1712 ret = -ENOMEM; 1713 } else { 1714 ret = bytes; 1715 } 1716 goto failed_send; 1717 } 1718 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1719 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1720 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1721 SBAL_FLAGS0_TYPE_WRITE_READ, 1722 els->resp, els->resp_count, 1723 ZFCP_MAX_SBALS_PER_ELS_REQ); 1724 if (bytes <= 0) { 1725 ZFCP_LOG_INFO("error: creation of ELS request failed " 1726 "(adapter %s, port d_id: 0x%08x)\n", 1727 zfcp_get_busid_by_adapter(adapter), d_id); 1728 if (bytes == 0) { 1729 ret = -ENOMEM; 1730 } else { 1731 ret = bytes; 1732 } 1733 goto failed_send; 1734 } 1735 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1736 } else { 1737 /* reject request */ 1738 ZFCP_LOG_INFO("error: microcode does not support chained SBALs" 1739 ", ELS request too big (adapter %s, " 1740 "port d_id: 0x%08x)\n", 1741 zfcp_get_busid_by_adapter(adapter), d_id); 1742 ret = -EOPNOTSUPP; 1743 goto failed_send; 1744 } 1745 1746 /* settings in QTCB */ 1747 fsf_req->qtcb->bottom.support.d_id = d_id; 1748 fsf_req->qtcb->bottom.support.service_class = 1749 ZFCP_FC_SERVICE_CLASS_DEFAULT; 1750 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; 1751 fsf_req->data = (unsigned long) els; 1752 1753 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1754 1755 zfcp_san_dbf_event_els_request(fsf_req); 1756 1757 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 1758 ret = zfcp_fsf_req_send(fsf_req); 1759 if (ret) { 1760 ZFCP_LOG_DEBUG("error: initiation of ELS request failed " 1761 "(adapter %s, port d_id: 0x%08x)\n", 1762 zfcp_get_busid_by_adapter(adapter), d_id); 1763 goto failed_send; 1764 } 1765 1766 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " 1767 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); 1768 goto out; 1769 1770 failed_send: 1771 zfcp_fsf_req_free(fsf_req); 1772 1773 failed_req: 1774 out: 1775 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1776 lock_flags); 1777 1778 return ret; 1779 } 1780 1781 /** 1782 * zfcp_fsf_send_els_handler - handler for ELS commands 1783 * @fsf_req: pointer to struct zfcp_fsf_req 1784 * 1785 * Data specific for the ELS command is passed using 1786 * fsf_req->data. There we find the pointer to struct zfcp_send_els. 1787 * Usually a specific handler for the ELS command is called which is 1788 * found in this structure. 1789 */ 1790 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) 1791 { 1792 struct zfcp_adapter *adapter; 1793 struct zfcp_port *port; 1794 u32 d_id; 1795 struct fsf_qtcb_header *header; 1796 struct fsf_qtcb_bottom_support *bottom; 1797 struct zfcp_send_els *send_els; 1798 int retval = -EINVAL; 1799 u16 subtable, rule, counter; 1800 1801 send_els = (struct zfcp_send_els *) fsf_req->data; 1802 adapter = send_els->adapter; 1803 port = send_els->port; 1804 d_id = send_els->d_id; 1805 header = &fsf_req->qtcb->header; 1806 bottom = &fsf_req->qtcb->bottom.support; 1807 1808 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1809 goto skip_fsfstatus; 1810 1811 switch (header->fsf_status) { 1812 1813 case FSF_GOOD: 1814 zfcp_san_dbf_event_els_response(fsf_req); 1815 retval = 0; 1816 break; 1817 1818 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1819 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1820 "class %d.\n", 1821 zfcp_get_busid_by_adapter(adapter), 1822 ZFCP_FC_SERVICE_CLASS_DEFAULT); 1823 /* stop operation for this adapter */ 1824 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1825 zfcp_erp_adapter_shutdown(adapter, 0); 1826 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1827 break; 1828 1829 case FSF_ADAPTER_STATUS_AVAILABLE: 1830 switch (header->fsf_status_qual.word[0]){ 1831 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1832 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1833 if (port && (send_els->ls_code != ZFCP_LS_ADISC)) 1834 zfcp_test_link(port); 1835 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1836 break; 1837 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1838 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1839 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1840 retval = 1841 zfcp_handle_els_rjt(header->fsf_status_qual.word[1], 1842 (struct zfcp_ls_rjt_par *) 1843 &header->fsf_status_qual.word[2]); 1844 break; 1845 case FSF_SQ_RETRY_IF_POSSIBLE: 1846 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry"); 1847 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1848 break; 1849 default: 1850 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", 1851 header->fsf_status_qual.word[0]); 1852 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1853 (char*)header->fsf_status_qual.word, 16); 1854 } 1855 break; 1856 1857 case FSF_ELS_COMMAND_REJECTED: 1858 ZFCP_LOG_INFO("ELS has been rejected because command filter " 1859 "prohibited sending " 1860 "(adapter: %s, port d_id: 0x%08x)\n", 1861 zfcp_get_busid_by_adapter(adapter), d_id); 1862 1863 break; 1864 1865 case FSF_PAYLOAD_SIZE_MISMATCH: 1866 ZFCP_LOG_INFO( 1867 "ELS request size and ELS response size must be either " 1868 "both 0, or both greater than 0 " 1869 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", 1870 zfcp_get_busid_by_adapter(adapter), 1871 bottom->req_buf_length, 1872 bottom->resp_buf_length); 1873 break; 1874 1875 case FSF_REQUEST_SIZE_TOO_LARGE: 1876 ZFCP_LOG_INFO( 1877 "Length of the ELS request buffer, " 1878 "specified in QTCB bottom, " 1879 "exceeds the size of the buffers " 1880 "that have been allocated for ELS request data " 1881 "(adapter: %s, req_buf_length=%d)\n", 1882 zfcp_get_busid_by_adapter(adapter), 1883 bottom->req_buf_length); 1884 break; 1885 1886 case FSF_RESPONSE_SIZE_TOO_LARGE: 1887 ZFCP_LOG_INFO( 1888 "Length of the ELS response buffer, " 1889 "specified in QTCB bottom, " 1890 "exceeds the size of the buffers " 1891 "that have been allocated for ELS response data " 1892 "(adapter: %s, resp_buf_length=%d)\n", 1893 zfcp_get_busid_by_adapter(adapter), 1894 bottom->resp_buf_length); 1895 break; 1896 1897 case FSF_SBAL_MISMATCH: 1898 /* should never occure, avoided in zfcp_fsf_send_els */ 1899 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1900 "resp_buf_length=%d)\n", 1901 zfcp_get_busid_by_adapter(adapter), 1902 bottom->req_buf_length, bottom->resp_buf_length); 1903 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1904 break; 1905 1906 case FSF_ACCESS_DENIED: 1907 ZFCP_LOG_NORMAL("access denied, cannot send ELS command " 1908 "(adapter %s, port d_id=0x%08x)\n", 1909 zfcp_get_busid_by_adapter(adapter), d_id); 1910 for (counter = 0; counter < 2; counter++) { 1911 subtable = header->fsf_status_qual.halfword[counter * 2]; 1912 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1913 switch (subtable) { 1914 case FSF_SQ_CFDC_SUBTABLE_OS: 1915 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1916 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1917 case FSF_SQ_CFDC_SUBTABLE_LUN: 1918 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1919 zfcp_act_subtable_type[subtable], rule); 1920 break; 1921 } 1922 } 1923 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1924 if (port != NULL) 1925 zfcp_erp_port_access_denied(port); 1926 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1927 break; 1928 1929 default: 1930 ZFCP_LOG_NORMAL( 1931 "bug: An unknown FSF Status was presented " 1932 "(adapter: %s, fsf_status=0x%08x)\n", 1933 zfcp_get_busid_by_adapter(adapter), 1934 header->fsf_status); 1935 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval"); 1936 debug_exception(adapter->erp_dbf, 0, 1937 &header->fsf_status_qual.word[0], sizeof(u32)); 1938 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1939 break; 1940 } 1941 1942 skip_fsfstatus: 1943 send_els->status = retval; 1944 1945 if (send_els->handler != 0) 1946 send_els->handler(send_els->handler_data); 1947 1948 return retval; 1949 } 1950 1951 int 1952 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 1953 { 1954 volatile struct qdio_buffer_element *sbale; 1955 struct zfcp_fsf_req *fsf_req; 1956 unsigned long lock_flags; 1957 int retval = 0; 1958 1959 /* setup new FSF request */ 1960 retval = zfcp_fsf_req_create(erp_action->adapter, 1961 FSF_QTCB_EXCHANGE_CONFIG_DATA, 1962 ZFCP_REQ_AUTO_CLEANUP, 1963 erp_action->adapter->pool.fsf_req_erp, 1964 &lock_flags, &fsf_req); 1965 if (retval < 0) { 1966 ZFCP_LOG_INFO("error: Could not create exchange configuration " 1967 "data request for adapter %s.\n", 1968 zfcp_get_busid_by_adapter(erp_action->adapter)); 1969 goto out; 1970 } 1971 1972 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1973 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1974 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1975 1976 fsf_req->qtcb->bottom.config.feature_selection = 1977 FSF_FEATURE_CFDC | 1978 FSF_FEATURE_LUN_SHARING | 1979 FSF_FEATURE_NOTIFICATION_LOST | 1980 FSF_FEATURE_UPDATE_ALERT; 1981 fsf_req->erp_action = erp_action; 1982 erp_action->fsf_req = fsf_req; 1983 1984 zfcp_erp_start_timer(fsf_req); 1985 retval = zfcp_fsf_req_send(fsf_req); 1986 if (retval) { 1987 ZFCP_LOG_INFO 1988 ("error: Could not send exchange configuration data " 1989 "command on the adapter %s\n", 1990 zfcp_get_busid_by_adapter(erp_action->adapter)); 1991 zfcp_fsf_req_free(fsf_req); 1992 erp_action->fsf_req = NULL; 1993 goto out; 1994 } 1995 1996 ZFCP_LOG_DEBUG("exchange configuration data request initiated " 1997 "(adapter %s)\n", 1998 zfcp_get_busid_by_adapter(erp_action->adapter)); 1999 2000 out: 2001 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2002 lock_flags); 2003 return retval; 2004 } 2005 2006 /** 2007 * zfcp_fsf_exchange_config_evaluate 2008 * @fsf_req: fsf_req which belongs to xchg config data request 2009 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) 2010 * 2011 * returns: -EIO on error, 0 otherwise 2012 */ 2013 static int 2014 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2015 { 2016 struct fsf_qtcb_bottom_config *bottom; 2017 struct zfcp_adapter *adapter = fsf_req->adapter; 2018 struct Scsi_Host *shost = adapter->scsi_host; 2019 2020 bottom = &fsf_req->qtcb->bottom.config; 2021 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", 2022 bottom->low_qtcb_version, bottom->high_qtcb_version); 2023 adapter->fsf_lic_version = bottom->lic_version; 2024 adapter->adapter_features = bottom->adapter_features; 2025 adapter->connection_features = bottom->connection_features; 2026 adapter->peer_wwpn = 0; 2027 adapter->peer_wwnn = 0; 2028 adapter->peer_d_id = 0; 2029 2030 if (xchg_ok) { 2031 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; 2032 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; 2033 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; 2034 fc_host_speed(shost) = bottom->fc_link_speed; 2035 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; 2036 adapter->hydra_version = bottom->adapter_type; 2037 if (fc_host_permanent_port_name(shost) == -1) 2038 fc_host_permanent_port_name(shost) = 2039 fc_host_port_name(shost); 2040 if (bottom->fc_topology == FSF_TOPO_P2P) { 2041 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; 2042 adapter->peer_wwpn = bottom->plogi_payload.wwpn; 2043 adapter->peer_wwnn = bottom->plogi_payload.wwnn; 2044 fc_host_port_type(shost) = FC_PORTTYPE_PTP; 2045 } else if (bottom->fc_topology == FSF_TOPO_FABRIC) 2046 fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 2047 else if (bottom->fc_topology == FSF_TOPO_AL) 2048 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; 2049 else 2050 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 2051 } else { 2052 fc_host_node_name(shost) = 0; 2053 fc_host_port_name(shost) = 0; 2054 fc_host_port_id(shost) = 0; 2055 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 2056 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 2057 adapter->hydra_version = 0; 2058 } 2059 2060 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { 2061 adapter->hardware_version = bottom->hardware_version; 2062 memcpy(fc_host_serial_number(shost), bottom->serial_number, 2063 min(FC_SERIAL_NUMBER_SIZE, 17)); 2064 EBCASC(fc_host_serial_number(shost), 2065 min(FC_SERIAL_NUMBER_SIZE, 17)); 2066 } 2067 2068 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n" 2069 "WWNN 0x%016Lx, " 2070 "WWPN 0x%016Lx, " 2071 "S_ID 0x%08x,\n" 2072 "adapter version 0x%x, " 2073 "LIC version 0x%x, " 2074 "FC link speed %d Gb/s\n", 2075 zfcp_get_busid_by_adapter(adapter), 2076 (wwn_t) fc_host_node_name(shost), 2077 (wwn_t) fc_host_port_name(shost), 2078 fc_host_port_id(shost), 2079 adapter->hydra_version, 2080 adapter->fsf_lic_version, 2081 fc_host_speed(shost)); 2082 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { 2083 ZFCP_LOG_NORMAL("error: the adapter %s " 2084 "only supports newer control block " 2085 "versions in comparison to this device " 2086 "driver (try updated device driver)\n", 2087 zfcp_get_busid_by_adapter(adapter)); 2088 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); 2089 zfcp_erp_adapter_shutdown(adapter, 0); 2090 return -EIO; 2091 } 2092 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { 2093 ZFCP_LOG_NORMAL("error: the adapter %s " 2094 "only supports older control block " 2095 "versions than this device driver uses" 2096 "(consider a microcode upgrade)\n", 2097 zfcp_get_busid_by_adapter(adapter)); 2098 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); 2099 zfcp_erp_adapter_shutdown(adapter, 0); 2100 return -EIO; 2101 } 2102 return 0; 2103 } 2104 2105 /* 2106 * function: zfcp_fsf_exchange_config_data_handler 2107 * 2108 * purpose: is called for finished Exchange Configuration Data command 2109 * 2110 * returns: 2111 */ 2112 static int 2113 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) 2114 { 2115 struct fsf_qtcb_bottom_config *bottom; 2116 struct zfcp_adapter *adapter = fsf_req->adapter; 2117 struct fsf_qtcb *qtcb = fsf_req->qtcb; 2118 2119 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2120 return -EIO; 2121 2122 switch (qtcb->header.fsf_status) { 2123 2124 case FSF_GOOD: 2125 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) 2126 return -EIO; 2127 2128 switch (fc_host_port_type(adapter->scsi_host)) { 2129 case FC_PORTTYPE_PTP: 2130 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " 2131 "configuration detected at adapter %s\n" 2132 "Peer WWNN 0x%016llx, " 2133 "peer WWPN 0x%016llx, " 2134 "peer d_id 0x%06x\n", 2135 zfcp_get_busid_by_adapter(adapter), 2136 adapter->peer_wwnn, 2137 adapter->peer_wwpn, 2138 adapter->peer_d_id); 2139 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2140 "top-p-to-p"); 2141 break; 2142 case FC_PORTTYPE_NLPORT: 2143 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " 2144 "topology detected at adapter %s " 2145 "unsupported, shutting down adapter\n", 2146 zfcp_get_busid_by_adapter(adapter)); 2147 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2148 "top-al"); 2149 zfcp_erp_adapter_shutdown(adapter, 0); 2150 return -EIO; 2151 case FC_PORTTYPE_NPORT: 2152 ZFCP_LOG_NORMAL("Switched fabric fibrechannel " 2153 "network detected at adapter %s.\n", 2154 zfcp_get_busid_by_adapter(adapter)); 2155 break; 2156 default: 2157 ZFCP_LOG_NORMAL("bug: The fibrechannel topology " 2158 "reported by the exchange " 2159 "configuration command for " 2160 "the adapter %s is not " 2161 "of a type known to the zfcp " 2162 "driver, shutting down adapter\n", 2163 zfcp_get_busid_by_adapter(adapter)); 2164 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2165 "unknown-topo"); 2166 zfcp_erp_adapter_shutdown(adapter, 0); 2167 return -EIO; 2168 } 2169 bottom = &qtcb->bottom.config; 2170 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 2171 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " 2172 "allowed by the adapter %s " 2173 "is lower than the minimum " 2174 "required by the driver (%ld bytes).\n", 2175 bottom->max_qtcb_size, 2176 zfcp_get_busid_by_adapter(adapter), 2177 sizeof(struct fsf_qtcb)); 2178 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2179 "qtcb-size"); 2180 debug_event(fsf_req->adapter->erp_dbf, 0, 2181 &bottom->max_qtcb_size, sizeof (u32)); 2182 zfcp_erp_adapter_shutdown(adapter, 0); 2183 return -EIO; 2184 } 2185 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 2186 &adapter->status); 2187 break; 2188 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2189 debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); 2190 2191 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) 2192 return -EIO; 2193 2194 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); 2195 2196 zfcp_fsf_link_down_info_eval(adapter, 2197 &qtcb->header.fsf_status_qual.link_down_info); 2198 break; 2199 default: 2200 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); 2201 debug_event(fsf_req->adapter->erp_dbf, 0, 2202 &fsf_req->qtcb->header.fsf_status, sizeof (u32)); 2203 zfcp_erp_adapter_shutdown(adapter, 0); 2204 return -EIO; 2205 } 2206 return 0; 2207 } 2208 2209 /** 2210 * zfcp_fsf_exchange_port_data - request information about local port 2211 * @erp_action: ERP action for the adapter for which port data is requested 2212 * @adapter: for which port data is requested 2213 * @data: response to exchange port data request 2214 */ 2215 int 2216 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action, 2217 struct zfcp_adapter *adapter, 2218 struct fsf_qtcb_bottom_port *data) 2219 { 2220 volatile struct qdio_buffer_element *sbale; 2221 struct zfcp_fsf_req *fsf_req; 2222 unsigned long lock_flags; 2223 int retval = 0; 2224 2225 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { 2226 ZFCP_LOG_INFO("error: exchange port data " 2227 "command not supported by adapter %s\n", 2228 zfcp_get_busid_by_adapter(adapter)); 2229 return -EOPNOTSUPP; 2230 } 2231 2232 /* setup new FSF request */ 2233 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 2234 erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0, 2235 NULL, &lock_flags, &fsf_req); 2236 if (retval < 0) { 2237 ZFCP_LOG_INFO("error: Out of resources. Could not create an " 2238 "exchange port data request for" 2239 "the adapter %s.\n", 2240 zfcp_get_busid_by_adapter(adapter)); 2241 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2242 lock_flags); 2243 return retval; 2244 } 2245 2246 if (data) 2247 fsf_req->data = (unsigned long) data; 2248 2249 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2250 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2251 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2252 2253 if (erp_action) { 2254 erp_action->fsf_req = fsf_req; 2255 fsf_req->erp_action = erp_action; 2256 zfcp_erp_start_timer(fsf_req); 2257 } else 2258 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 2259 2260 retval = zfcp_fsf_req_send(fsf_req); 2261 if (retval) { 2262 ZFCP_LOG_INFO("error: Could not send an exchange port data " 2263 "command on the adapter %s\n", 2264 zfcp_get_busid_by_adapter(adapter)); 2265 zfcp_fsf_req_free(fsf_req); 2266 if (erp_action) 2267 erp_action->fsf_req = NULL; 2268 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2269 lock_flags); 2270 return retval; 2271 } 2272 2273 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 2274 2275 if (!erp_action) { 2276 wait_event(fsf_req->completion_wq, 2277 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 2278 zfcp_fsf_req_free(fsf_req); 2279 } 2280 return retval; 2281 } 2282 2283 /** 2284 * zfcp_fsf_exchange_port_evaluate 2285 * @fsf_req: fsf_req which belongs to xchg port data request 2286 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) 2287 */ 2288 static void 2289 zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2290 { 2291 struct zfcp_adapter *adapter; 2292 struct fsf_qtcb *qtcb; 2293 struct fsf_qtcb_bottom_port *bottom, *data; 2294 struct Scsi_Host *shost; 2295 2296 adapter = fsf_req->adapter; 2297 qtcb = fsf_req->qtcb; 2298 bottom = &qtcb->bottom.port; 2299 shost = adapter->scsi_host; 2300 2301 data = (struct fsf_qtcb_bottom_port*) fsf_req->data; 2302 if (data) 2303 memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port)); 2304 2305 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) 2306 fc_host_permanent_port_name(shost) = bottom->wwpn; 2307 else 2308 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 2309 fc_host_maxframe_size(shost) = bottom->maximum_frame_size; 2310 fc_host_supported_speeds(shost) = bottom->supported_speed; 2311 } 2312 2313 /** 2314 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request 2315 * @fsf_req: pointer to struct zfcp_fsf_req 2316 */ 2317 static void 2318 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) 2319 { 2320 struct zfcp_adapter *adapter; 2321 struct fsf_qtcb *qtcb; 2322 2323 adapter = fsf_req->adapter; 2324 qtcb = fsf_req->qtcb; 2325 2326 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2327 return; 2328 2329 switch (qtcb->header.fsf_status) { 2330 case FSF_GOOD: 2331 zfcp_fsf_exchange_port_evaluate(fsf_req, 1); 2332 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); 2333 break; 2334 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2335 zfcp_fsf_exchange_port_evaluate(fsf_req, 0); 2336 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); 2337 zfcp_fsf_link_down_info_eval(adapter, 2338 &qtcb->header.fsf_status_qual.link_down_info); 2339 break; 2340 default: 2341 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng"); 2342 debug_event(adapter->erp_dbf, 0, 2343 &fsf_req->qtcb->header.fsf_status, sizeof(u32)); 2344 } 2345 } 2346 2347 2348 /* 2349 * function: zfcp_fsf_open_port 2350 * 2351 * purpose: 2352 * 2353 * returns: address of initiated FSF request 2354 * NULL - request could not be initiated 2355 */ 2356 int 2357 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 2358 { 2359 volatile struct qdio_buffer_element *sbale; 2360 struct zfcp_fsf_req *fsf_req; 2361 unsigned long lock_flags; 2362 int retval = 0; 2363 2364 /* setup new FSF request */ 2365 retval = zfcp_fsf_req_create(erp_action->adapter, 2366 FSF_QTCB_OPEN_PORT_WITH_DID, 2367 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2368 erp_action->adapter->pool.fsf_req_erp, 2369 &lock_flags, &fsf_req); 2370 if (retval < 0) { 2371 ZFCP_LOG_INFO("error: Could not create open port request " 2372 "for port 0x%016Lx on adapter %s.\n", 2373 erp_action->port->wwpn, 2374 zfcp_get_busid_by_adapter(erp_action->adapter)); 2375 goto out; 2376 } 2377 2378 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2379 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2380 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2381 2382 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; 2383 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); 2384 fsf_req->data = (unsigned long) erp_action->port; 2385 fsf_req->erp_action = erp_action; 2386 erp_action->fsf_req = fsf_req; 2387 2388 zfcp_erp_start_timer(fsf_req); 2389 retval = zfcp_fsf_req_send(fsf_req); 2390 if (retval) { 2391 ZFCP_LOG_INFO("error: Could not send open port request for " 2392 "port 0x%016Lx on adapter %s.\n", 2393 erp_action->port->wwpn, 2394 zfcp_get_busid_by_adapter(erp_action->adapter)); 2395 zfcp_fsf_req_free(fsf_req); 2396 erp_action->fsf_req = NULL; 2397 goto out; 2398 } 2399 2400 ZFCP_LOG_DEBUG("open port request initiated " 2401 "(adapter %s, port 0x%016Lx)\n", 2402 zfcp_get_busid_by_adapter(erp_action->adapter), 2403 erp_action->port->wwpn); 2404 out: 2405 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2406 lock_flags); 2407 return retval; 2408 } 2409 2410 /* 2411 * function: zfcp_fsf_open_port_handler 2412 * 2413 * purpose: is called for finished Open Port command 2414 * 2415 * returns: 2416 */ 2417 static int 2418 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) 2419 { 2420 int retval = -EINVAL; 2421 struct zfcp_port *port; 2422 struct fsf_plogi *plogi; 2423 struct fsf_qtcb_header *header; 2424 u16 subtable, rule, counter; 2425 2426 port = (struct zfcp_port *) fsf_req->data; 2427 header = &fsf_req->qtcb->header; 2428 2429 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2430 /* don't change port status in our bookkeeping */ 2431 goto skip_fsfstatus; 2432 } 2433 2434 /* evaluate FSF status in QTCB */ 2435 switch (header->fsf_status) { 2436 2437 case FSF_PORT_ALREADY_OPEN: 2438 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " 2439 "is already open.\n", 2440 port->wwpn, zfcp_get_busid_by_port(port)); 2441 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2442 "fsf_s_popen"); 2443 /* 2444 * This is a bug, however operation should continue normally 2445 * if it is simply ignored 2446 */ 2447 break; 2448 2449 case FSF_ACCESS_DENIED: 2450 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " 2451 "on adapter %s\n", 2452 port->wwpn, zfcp_get_busid_by_port(port)); 2453 for (counter = 0; counter < 2; counter++) { 2454 subtable = header->fsf_status_qual.halfword[counter * 2]; 2455 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2456 switch (subtable) { 2457 case FSF_SQ_CFDC_SUBTABLE_OS: 2458 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2459 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2460 case FSF_SQ_CFDC_SUBTABLE_LUN: 2461 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2462 zfcp_act_subtable_type[subtable], rule); 2463 break; 2464 } 2465 } 2466 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2467 zfcp_erp_port_access_denied(port); 2468 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2469 break; 2470 2471 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 2472 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " 2473 "The remote port 0x%016Lx on adapter %s " 2474 "could not be opened. Disabling it.\n", 2475 port->wwpn, zfcp_get_busid_by_port(port)); 2476 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2477 "fsf_s_max_ports"); 2478 zfcp_erp_port_failed(port); 2479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2480 break; 2481 2482 case FSF_ADAPTER_STATUS_AVAILABLE: 2483 switch (header->fsf_status_qual.word[0]) { 2484 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2485 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2486 "fsf_sq_ltest"); 2487 /* ERP strategy will escalate */ 2488 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2489 break; 2490 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2491 /* ERP strategy will escalate */ 2492 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2493 "fsf_sq_ulp"); 2494 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2495 break; 2496 case FSF_SQ_NO_RETRY_POSSIBLE: 2497 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " 2498 "adapter %s could not be opened. " 2499 "Disabling it.\n", 2500 port->wwpn, 2501 zfcp_get_busid_by_port(port)); 2502 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2503 "fsf_sq_no_retry"); 2504 zfcp_erp_port_failed(port); 2505 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2506 break; 2507 default: 2508 ZFCP_LOG_NORMAL 2509 ("bug: Wrong status qualifier 0x%x arrived.\n", 2510 header->fsf_status_qual.word[0]); 2511 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2512 "fsf_sq_inval:"); 2513 debug_exception( 2514 fsf_req->adapter->erp_dbf, 0, 2515 &header->fsf_status_qual.word[0], 2516 sizeof (u32)); 2517 break; 2518 } 2519 break; 2520 2521 case FSF_GOOD: 2522 /* save port handle assigned by FSF */ 2523 port->handle = header->port_handle; 2524 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " 2525 "was opened, it's port handle is 0x%x\n", 2526 port->wwpn, zfcp_get_busid_by_port(port), 2527 port->handle); 2528 /* mark port as open */ 2529 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | 2530 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2531 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 2532 ZFCP_STATUS_COMMON_ACCESS_BOXED, 2533 &port->status); 2534 retval = 0; 2535 /* check whether D_ID has changed during open */ 2536 /* 2537 * FIXME: This check is not airtight, as the FCP channel does 2538 * not monitor closures of target port connections caused on 2539 * the remote side. Thus, they might miss out on invalidating 2540 * locally cached WWPNs (and other N_Port parameters) of gone 2541 * target ports. So, our heroic attempt to make things safe 2542 * could be undermined by 'open port' response data tagged with 2543 * obsolete WWPNs. Another reason to monitor potential 2544 * connection closures ourself at least (by interpreting 2545 * incoming ELS' and unsolicited status). It just crosses my 2546 * mind that one should be able to cross-check by means of 2547 * another GID_PN straight after a port has been opened. 2548 * Alternately, an ADISC/PDISC ELS should suffice, as well. 2549 */ 2550 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; 2551 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) 2552 { 2553 if (fsf_req->qtcb->bottom.support.els1_length < 2554 sizeof (struct fsf_plogi)) { 2555 ZFCP_LOG_INFO( 2556 "warning: insufficient length of " 2557 "PLOGI payload (%i)\n", 2558 fsf_req->qtcb->bottom.support.els1_length); 2559 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2560 "fsf_s_short_plogi:"); 2561 /* skip sanity check and assume wwpn is ok */ 2562 } else { 2563 if (plogi->serv_param.wwpn != port->wwpn) { 2564 ZFCP_LOG_INFO("warning: d_id of port " 2565 "0x%016Lx changed during " 2566 "open\n", port->wwpn); 2567 debug_text_event( 2568 fsf_req->adapter->erp_dbf, 0, 2569 "fsf_s_did_change:"); 2570 atomic_clear_mask( 2571 ZFCP_STATUS_PORT_DID_DID, 2572 &port->status); 2573 } else { 2574 port->wwnn = plogi->serv_param.wwnn; 2575 zfcp_plogi_evaluate(port, plogi); 2576 } 2577 } 2578 } 2579 break; 2580 2581 case FSF_UNKNOWN_OP_SUBTYPE: 2582 /* should never occure, subtype not set in zfcp_fsf_open_port */ 2583 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " 2584 "op_subtype=0x%x)\n", 2585 zfcp_get_busid_by_port(port), 2586 fsf_req->qtcb->bottom.support.operation_subtype); 2587 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2588 break; 2589 2590 default: 2591 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2592 "(debug info 0x%x)\n", 2593 header->fsf_status); 2594 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2595 debug_exception(fsf_req->adapter->erp_dbf, 0, 2596 &header->fsf_status, sizeof (u32)); 2597 break; 2598 } 2599 2600 skip_fsfstatus: 2601 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); 2602 return retval; 2603 } 2604 2605 /* 2606 * function: zfcp_fsf_close_port 2607 * 2608 * purpose: submit FSF command "close port" 2609 * 2610 * returns: address of initiated FSF request 2611 * NULL - request could not be initiated 2612 */ 2613 int 2614 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 2615 { 2616 volatile struct qdio_buffer_element *sbale; 2617 struct zfcp_fsf_req *fsf_req; 2618 unsigned long lock_flags; 2619 int retval = 0; 2620 2621 /* setup new FSF request */ 2622 retval = zfcp_fsf_req_create(erp_action->adapter, 2623 FSF_QTCB_CLOSE_PORT, 2624 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2625 erp_action->adapter->pool.fsf_req_erp, 2626 &lock_flags, &fsf_req); 2627 if (retval < 0) { 2628 ZFCP_LOG_INFO("error: Could not create a close port request " 2629 "for port 0x%016Lx on adapter %s.\n", 2630 erp_action->port->wwpn, 2631 zfcp_get_busid_by_adapter(erp_action->adapter)); 2632 goto out; 2633 } 2634 2635 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2636 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2637 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2638 2639 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); 2640 fsf_req->data = (unsigned long) erp_action->port; 2641 fsf_req->erp_action = erp_action; 2642 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 2643 fsf_req->erp_action = erp_action; 2644 erp_action->fsf_req = fsf_req; 2645 2646 zfcp_erp_start_timer(fsf_req); 2647 retval = zfcp_fsf_req_send(fsf_req); 2648 if (retval) { 2649 ZFCP_LOG_INFO("error: Could not send a close port request for " 2650 "port 0x%016Lx on adapter %s.\n", 2651 erp_action->port->wwpn, 2652 zfcp_get_busid_by_adapter(erp_action->adapter)); 2653 zfcp_fsf_req_free(fsf_req); 2654 erp_action->fsf_req = NULL; 2655 goto out; 2656 } 2657 2658 ZFCP_LOG_TRACE("close port request initiated " 2659 "(adapter %s, port 0x%016Lx)\n", 2660 zfcp_get_busid_by_adapter(erp_action->adapter), 2661 erp_action->port->wwpn); 2662 out: 2663 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2664 lock_flags); 2665 return retval; 2666 } 2667 2668 /* 2669 * function: zfcp_fsf_close_port_handler 2670 * 2671 * purpose: is called for finished Close Port FSF command 2672 * 2673 * returns: 2674 */ 2675 static int 2676 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) 2677 { 2678 int retval = -EINVAL; 2679 struct zfcp_port *port; 2680 2681 port = (struct zfcp_port *) fsf_req->data; 2682 2683 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2684 /* don't change port status in our bookkeeping */ 2685 goto skip_fsfstatus; 2686 } 2687 2688 /* evaluate FSF status in QTCB */ 2689 switch (fsf_req->qtcb->header.fsf_status) { 2690 2691 case FSF_PORT_HANDLE_NOT_VALID: 2692 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 2693 "0x%016Lx on adapter %s invalid. This may happen " 2694 "occasionally.\n", port->handle, 2695 port->wwpn, zfcp_get_busid_by_port(port)); 2696 ZFCP_LOG_DEBUG("status qualifier:\n"); 2697 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2698 (char *) &fsf_req->qtcb->header.fsf_status_qual, 2699 sizeof (union fsf_status_qual)); 2700 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2701 "fsf_s_phand_nv"); 2702 zfcp_erp_adapter_reopen(port->adapter, 0); 2703 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2704 break; 2705 2706 case FSF_ADAPTER_STATUS_AVAILABLE: 2707 /* Note: FSF has actually closed the port in this case. 2708 * The status code is just daft. Fingers crossed for a change 2709 */ 2710 retval = 0; 2711 break; 2712 2713 case FSF_GOOD: 2714 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " 2715 "port handle 0x%x\n", port->wwpn, 2716 zfcp_get_busid_by_port(port), port->handle); 2717 zfcp_erp_modify_port_status(port, 2718 ZFCP_STATUS_COMMON_OPEN, 2719 ZFCP_CLEAR); 2720 retval = 0; 2721 break; 2722 2723 default: 2724 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2725 "(debug info 0x%x)\n", 2726 fsf_req->qtcb->header.fsf_status); 2727 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2728 debug_exception(fsf_req->adapter->erp_dbf, 0, 2729 &fsf_req->qtcb->header.fsf_status, 2730 sizeof (u32)); 2731 break; 2732 } 2733 2734 skip_fsfstatus: 2735 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); 2736 return retval; 2737 } 2738 2739 /* 2740 * function: zfcp_fsf_close_physical_port 2741 * 2742 * purpose: submit FSF command "close physical port" 2743 * 2744 * returns: address of initiated FSF request 2745 * NULL - request could not be initiated 2746 */ 2747 int 2748 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 2749 { 2750 volatile struct qdio_buffer_element *sbale; 2751 struct zfcp_fsf_req *fsf_req; 2752 unsigned long lock_flags; 2753 int retval = 0; 2754 2755 /* setup new FSF request */ 2756 retval = zfcp_fsf_req_create(erp_action->adapter, 2757 FSF_QTCB_CLOSE_PHYSICAL_PORT, 2758 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2759 erp_action->adapter->pool.fsf_req_erp, 2760 &lock_flags, &fsf_req); 2761 if (retval < 0) { 2762 ZFCP_LOG_INFO("error: Could not create close physical port " 2763 "request (adapter %s, port 0x%016Lx)\n", 2764 zfcp_get_busid_by_adapter(erp_action->adapter), 2765 erp_action->port->wwpn); 2766 2767 goto out; 2768 } 2769 2770 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2771 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2772 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2773 2774 /* mark port as being closed */ 2775 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, 2776 &erp_action->port->status); 2777 /* save a pointer to this port */ 2778 fsf_req->data = (unsigned long) erp_action->port; 2779 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 2780 fsf_req->erp_action = erp_action; 2781 erp_action->fsf_req = fsf_req; 2782 2783 zfcp_erp_start_timer(fsf_req); 2784 retval = zfcp_fsf_req_send(fsf_req); 2785 if (retval) { 2786 ZFCP_LOG_INFO("error: Could not send close physical port " 2787 "request (adapter %s, port 0x%016Lx)\n", 2788 zfcp_get_busid_by_adapter(erp_action->adapter), 2789 erp_action->port->wwpn); 2790 zfcp_fsf_req_free(fsf_req); 2791 erp_action->fsf_req = NULL; 2792 goto out; 2793 } 2794 2795 ZFCP_LOG_TRACE("close physical port request initiated " 2796 "(adapter %s, port 0x%016Lx)\n", 2797 zfcp_get_busid_by_adapter(erp_action->adapter), 2798 erp_action->port->wwpn); 2799 out: 2800 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2801 lock_flags); 2802 return retval; 2803 } 2804 2805 /* 2806 * function: zfcp_fsf_close_physical_port_handler 2807 * 2808 * purpose: is called for finished Close Physical Port FSF command 2809 * 2810 * returns: 2811 */ 2812 static int 2813 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) 2814 { 2815 int retval = -EINVAL; 2816 struct zfcp_port *port; 2817 struct zfcp_unit *unit; 2818 struct fsf_qtcb_header *header; 2819 u16 subtable, rule, counter; 2820 2821 port = (struct zfcp_port *) fsf_req->data; 2822 header = &fsf_req->qtcb->header; 2823 2824 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2825 /* don't change port status in our bookkeeping */ 2826 goto skip_fsfstatus; 2827 } 2828 2829 /* evaluate FSF status in QTCB */ 2830 switch (header->fsf_status) { 2831 2832 case FSF_PORT_HANDLE_NOT_VALID: 2833 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" 2834 "(adapter %s, port 0x%016Lx). " 2835 "This may happen occasionally.\n", 2836 port->handle, 2837 zfcp_get_busid_by_port(port), 2838 port->wwpn); 2839 ZFCP_LOG_DEBUG("status qualifier:\n"); 2840 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2841 (char *) &header->fsf_status_qual, 2842 sizeof (union fsf_status_qual)); 2843 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2844 "fsf_s_phand_nv"); 2845 zfcp_erp_adapter_reopen(port->adapter, 0); 2846 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2847 break; 2848 2849 case FSF_ACCESS_DENIED: 2850 ZFCP_LOG_NORMAL("Access denied, cannot close " 2851 "physical port 0x%016Lx on adapter %s\n", 2852 port->wwpn, zfcp_get_busid_by_port(port)); 2853 for (counter = 0; counter < 2; counter++) { 2854 subtable = header->fsf_status_qual.halfword[counter * 2]; 2855 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2856 switch (subtable) { 2857 case FSF_SQ_CFDC_SUBTABLE_OS: 2858 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2859 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2860 case FSF_SQ_CFDC_SUBTABLE_LUN: 2861 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2862 zfcp_act_subtable_type[subtable], rule); 2863 break; 2864 } 2865 } 2866 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2867 zfcp_erp_port_access_denied(port); 2868 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2869 break; 2870 2871 case FSF_PORT_BOXED: 2872 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " 2873 "%s needs to be reopened but it was attempted " 2874 "to close it physically.\n", 2875 port->wwpn, 2876 zfcp_get_busid_by_port(port)); 2877 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); 2878 zfcp_erp_port_boxed(port); 2879 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2880 ZFCP_STATUS_FSFREQ_RETRY; 2881 break; 2882 2883 case FSF_ADAPTER_STATUS_AVAILABLE: 2884 switch (header->fsf_status_qual.word[0]) { 2885 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2886 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2887 "fsf_sq_ltest"); 2888 /* This will now be escalated by ERP */ 2889 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2890 break; 2891 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2892 /* ERP strategy will escalate */ 2893 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2894 "fsf_sq_ulp"); 2895 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2896 break; 2897 default: 2898 ZFCP_LOG_NORMAL 2899 ("bug: Wrong status qualifier 0x%x arrived.\n", 2900 header->fsf_status_qual.word[0]); 2901 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2902 "fsf_sq_inval:"); 2903 debug_exception( 2904 fsf_req->adapter->erp_dbf, 0, 2905 &header->fsf_status_qual.word[0], sizeof (u32)); 2906 break; 2907 } 2908 break; 2909 2910 case FSF_GOOD: 2911 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " 2912 "physically closed, port handle 0x%x\n", 2913 port->wwpn, 2914 zfcp_get_busid_by_port(port), port->handle); 2915 /* can't use generic zfcp_erp_modify_port_status because 2916 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 2917 */ 2918 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2919 list_for_each_entry(unit, &port->unit_list_head, list) 2920 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 2921 retval = 0; 2922 break; 2923 2924 default: 2925 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2926 "(debug info 0x%x)\n", 2927 header->fsf_status); 2928 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2929 debug_exception(fsf_req->adapter->erp_dbf, 0, 2930 &header->fsf_status, sizeof (u32)); 2931 break; 2932 } 2933 2934 skip_fsfstatus: 2935 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); 2936 return retval; 2937 } 2938 2939 /* 2940 * function: zfcp_fsf_open_unit 2941 * 2942 * purpose: 2943 * 2944 * returns: 2945 * 2946 * assumptions: This routine does not check whether the associated 2947 * remote port has already been opened. This should be 2948 * done by calling routines. Otherwise some status 2949 * may be presented by FSF 2950 */ 2951 int 2952 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 2953 { 2954 volatile struct qdio_buffer_element *sbale; 2955 struct zfcp_fsf_req *fsf_req; 2956 unsigned long lock_flags; 2957 int retval = 0; 2958 2959 /* setup new FSF request */ 2960 retval = zfcp_fsf_req_create(erp_action->adapter, 2961 FSF_QTCB_OPEN_LUN, 2962 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2963 erp_action->adapter->pool.fsf_req_erp, 2964 &lock_flags, &fsf_req); 2965 if (retval < 0) { 2966 ZFCP_LOG_INFO("error: Could not create open unit request for " 2967 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 2968 erp_action->unit->fcp_lun, 2969 erp_action->unit->port->wwpn, 2970 zfcp_get_busid_by_adapter(erp_action->adapter)); 2971 goto out; 2972 } 2973 2974 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2975 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2976 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2977 2978 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 2979 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; 2980 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) 2981 fsf_req->qtcb->bottom.support.option = 2982 FSF_OPEN_LUN_SUPPRESS_BOXING; 2983 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); 2984 fsf_req->data = (unsigned long) erp_action->unit; 2985 fsf_req->erp_action = erp_action; 2986 erp_action->fsf_req = fsf_req; 2987 2988 zfcp_erp_start_timer(fsf_req); 2989 retval = zfcp_fsf_req_send(erp_action->fsf_req); 2990 if (retval) { 2991 ZFCP_LOG_INFO("error: Could not send an open unit request " 2992 "on the adapter %s, port 0x%016Lx for " 2993 "unit 0x%016Lx\n", 2994 zfcp_get_busid_by_adapter(erp_action->adapter), 2995 erp_action->port->wwpn, 2996 erp_action->unit->fcp_lun); 2997 zfcp_fsf_req_free(fsf_req); 2998 erp_action->fsf_req = NULL; 2999 goto out; 3000 } 3001 3002 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " 3003 "port 0x%016Lx, unit 0x%016Lx)\n", 3004 zfcp_get_busid_by_adapter(erp_action->adapter), 3005 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3006 out: 3007 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3008 lock_flags); 3009 return retval; 3010 } 3011 3012 /* 3013 * function: zfcp_fsf_open_unit_handler 3014 * 3015 * purpose: is called for finished Open LUN command 3016 * 3017 * returns: 3018 */ 3019 static int 3020 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) 3021 { 3022 int retval = -EINVAL; 3023 struct zfcp_adapter *adapter; 3024 struct zfcp_unit *unit; 3025 struct fsf_qtcb_header *header; 3026 struct fsf_qtcb_bottom_support *bottom; 3027 struct fsf_queue_designator *queue_designator; 3028 u16 subtable, rule, counter; 3029 int exclusive, readwrite; 3030 3031 unit = (struct zfcp_unit *) fsf_req->data; 3032 3033 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3034 /* don't change unit status in our bookkeeping */ 3035 goto skip_fsfstatus; 3036 } 3037 3038 adapter = fsf_req->adapter; 3039 header = &fsf_req->qtcb->header; 3040 bottom = &fsf_req->qtcb->bottom.support; 3041 queue_designator = &header->fsf_status_qual.fsf_queue_designator; 3042 3043 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 3044 ZFCP_STATUS_UNIT_SHARED | 3045 ZFCP_STATUS_UNIT_READONLY, 3046 &unit->status); 3047 3048 /* evaluate FSF status in QTCB */ 3049 switch (header->fsf_status) { 3050 3051 case FSF_PORT_HANDLE_NOT_VALID: 3052 ZFCP_LOG_INFO("Temporary port identifier 0x%x " 3053 "for port 0x%016Lx on adapter %s invalid " 3054 "This may happen occasionally\n", 3055 unit->port->handle, 3056 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3057 ZFCP_LOG_DEBUG("status qualifier:\n"); 3058 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3059 (char *) &header->fsf_status_qual, 3060 sizeof (union fsf_status_qual)); 3061 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); 3062 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3063 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3064 break; 3065 3066 case FSF_LUN_ALREADY_OPEN: 3067 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " 3068 "remote port 0x%016Lx on adapter %s twice.\n", 3069 unit->fcp_lun, 3070 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3071 debug_text_exception(adapter->erp_dbf, 0, 3072 "fsf_s_uopen"); 3073 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3074 break; 3075 3076 case FSF_ACCESS_DENIED: 3077 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " 3078 "remote port 0x%016Lx on adapter %s\n", 3079 unit->fcp_lun, unit->port->wwpn, 3080 zfcp_get_busid_by_unit(unit)); 3081 for (counter = 0; counter < 2; counter++) { 3082 subtable = header->fsf_status_qual.halfword[counter * 2]; 3083 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3084 switch (subtable) { 3085 case FSF_SQ_CFDC_SUBTABLE_OS: 3086 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3087 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3088 case FSF_SQ_CFDC_SUBTABLE_LUN: 3089 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3090 zfcp_act_subtable_type[subtable], rule); 3091 break; 3092 } 3093 } 3094 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 3095 zfcp_erp_unit_access_denied(unit); 3096 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3097 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3098 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3099 break; 3100 3101 case FSF_PORT_BOXED: 3102 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3103 "needs to be reopened\n", 3104 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3105 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 3106 zfcp_erp_port_boxed(unit->port); 3107 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3108 ZFCP_STATUS_FSFREQ_RETRY; 3109 break; 3110 3111 case FSF_LUN_SHARING_VIOLATION: 3112 if (header->fsf_status_qual.word[0] != 0) { 3113 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " 3114 "with WWPN 0x%Lx " 3115 "connected to the adapter %s " 3116 "is already in use in LPAR%d, CSS%d\n", 3117 unit->fcp_lun, 3118 unit->port->wwpn, 3119 zfcp_get_busid_by_unit(unit), 3120 queue_designator->hla, 3121 queue_designator->cssid); 3122 } else { 3123 subtable = header->fsf_status_qual.halfword[4]; 3124 rule = header->fsf_status_qual.halfword[5]; 3125 switch (subtable) { 3126 case FSF_SQ_CFDC_SUBTABLE_OS: 3127 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3128 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3129 case FSF_SQ_CFDC_SUBTABLE_LUN: 3130 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " 3131 "remote port with WWPN 0x%Lx " 3132 "connected to the adapter %s " 3133 "is denied (%s rule %d)\n", 3134 unit->fcp_lun, 3135 unit->port->wwpn, 3136 zfcp_get_busid_by_unit(unit), 3137 zfcp_act_subtable_type[subtable], 3138 rule); 3139 break; 3140 } 3141 } 3142 ZFCP_LOG_DEBUG("status qualifier:\n"); 3143 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3144 (char *) &header->fsf_status_qual, 3145 sizeof (union fsf_status_qual)); 3146 debug_text_event(adapter->erp_dbf, 2, 3147 "fsf_s_l_sh_vio"); 3148 zfcp_erp_unit_access_denied(unit); 3149 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3150 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3151 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3152 break; 3153 3154 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 3155 ZFCP_LOG_INFO("error: The adapter ran out of resources. " 3156 "There is no handle (temporary port identifier) " 3157 "available for unit 0x%016Lx on port 0x%016Lx " 3158 "on adapter %s\n", 3159 unit->fcp_lun, 3160 unit->port->wwpn, 3161 zfcp_get_busid_by_unit(unit)); 3162 debug_text_event(adapter->erp_dbf, 1, 3163 "fsf_s_max_units"); 3164 zfcp_erp_unit_failed(unit); 3165 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3166 break; 3167 3168 case FSF_ADAPTER_STATUS_AVAILABLE: 3169 switch (header->fsf_status_qual.word[0]) { 3170 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3171 /* Re-establish link to port */ 3172 debug_text_event(adapter->erp_dbf, 1, 3173 "fsf_sq_ltest"); 3174 zfcp_test_link(unit->port); 3175 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3176 break; 3177 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3178 /* ERP strategy will escalate */ 3179 debug_text_event(adapter->erp_dbf, 1, 3180 "fsf_sq_ulp"); 3181 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3182 break; 3183 default: 3184 ZFCP_LOG_NORMAL 3185 ("bug: Wrong status qualifier 0x%x arrived.\n", 3186 header->fsf_status_qual.word[0]); 3187 debug_text_event(adapter->erp_dbf, 0, 3188 "fsf_sq_inval:"); 3189 debug_exception(adapter->erp_dbf, 0, 3190 &header->fsf_status_qual.word[0], 3191 sizeof (u32)); 3192 } 3193 break; 3194 3195 case FSF_INVALID_COMMAND_OPTION: 3196 ZFCP_LOG_NORMAL( 3197 "Invalid option 0x%x has been specified " 3198 "in QTCB bottom sent to the adapter %s\n", 3199 bottom->option, 3200 zfcp_get_busid_by_adapter(adapter)); 3201 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3202 retval = -EINVAL; 3203 break; 3204 3205 case FSF_GOOD: 3206 /* save LUN handle assigned by FSF */ 3207 unit->handle = header->lun_handle; 3208 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " 3209 "adapter %s opened, port handle 0x%x\n", 3210 unit->fcp_lun, 3211 unit->port->wwpn, 3212 zfcp_get_busid_by_unit(unit), 3213 unit->handle); 3214 /* mark unit as open */ 3215 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3216 3217 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && 3218 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && 3219 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) { 3220 exclusive = (bottom->lun_access_info & 3221 FSF_UNIT_ACCESS_EXCLUSIVE); 3222 readwrite = (bottom->lun_access_info & 3223 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER); 3224 3225 if (!exclusive) 3226 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, 3227 &unit->status); 3228 3229 if (!readwrite) { 3230 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, 3231 &unit->status); 3232 ZFCP_LOG_NORMAL("read-only access for unit " 3233 "(adapter %s, wwpn=0x%016Lx, " 3234 "fcp_lun=0x%016Lx)\n", 3235 zfcp_get_busid_by_unit(unit), 3236 unit->port->wwpn, 3237 unit->fcp_lun); 3238 } 3239 3240 if (exclusive && !readwrite) { 3241 ZFCP_LOG_NORMAL("exclusive access of read-only " 3242 "unit not supported\n"); 3243 zfcp_erp_unit_failed(unit); 3244 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3245 zfcp_erp_unit_shutdown(unit, 0); 3246 } else if (!exclusive && readwrite) { 3247 ZFCP_LOG_NORMAL("shared access of read-write " 3248 "unit not supported\n"); 3249 zfcp_erp_unit_failed(unit); 3250 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3251 zfcp_erp_unit_shutdown(unit, 0); 3252 } 3253 } 3254 3255 retval = 0; 3256 break; 3257 3258 default: 3259 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3260 "(debug info 0x%x)\n", 3261 header->fsf_status); 3262 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); 3263 debug_exception(adapter->erp_dbf, 0, 3264 &header->fsf_status, sizeof (u32)); 3265 break; 3266 } 3267 3268 skip_fsfstatus: 3269 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); 3270 return retval; 3271 } 3272 3273 /* 3274 * function: zfcp_fsf_close_unit 3275 * 3276 * purpose: 3277 * 3278 * returns: address of fsf_req - request successfully initiated 3279 * NULL - 3280 * 3281 * assumptions: This routine does not check whether the associated 3282 * remote port/lun has already been opened. This should be 3283 * done by calling routines. Otherwise some status 3284 * may be presented by FSF 3285 */ 3286 int 3287 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 3288 { 3289 volatile struct qdio_buffer_element *sbale; 3290 struct zfcp_fsf_req *fsf_req; 3291 unsigned long lock_flags; 3292 int retval = 0; 3293 3294 /* setup new FSF request */ 3295 retval = zfcp_fsf_req_create(erp_action->adapter, 3296 FSF_QTCB_CLOSE_LUN, 3297 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3298 erp_action->adapter->pool.fsf_req_erp, 3299 &lock_flags, &fsf_req); 3300 if (retval < 0) { 3301 ZFCP_LOG_INFO("error: Could not create close unit request for " 3302 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3303 erp_action->unit->fcp_lun, 3304 erp_action->port->wwpn, 3305 zfcp_get_busid_by_adapter(erp_action->adapter)); 3306 goto out; 3307 } 3308 3309 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3310 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3311 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3312 3313 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 3314 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; 3315 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); 3316 fsf_req->data = (unsigned long) erp_action->unit; 3317 fsf_req->erp_action = erp_action; 3318 erp_action->fsf_req = fsf_req; 3319 3320 zfcp_erp_start_timer(fsf_req); 3321 retval = zfcp_fsf_req_send(erp_action->fsf_req); 3322 if (retval) { 3323 ZFCP_LOG_INFO("error: Could not send a close unit request for " 3324 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", 3325 erp_action->unit->fcp_lun, 3326 erp_action->port->wwpn, 3327 zfcp_get_busid_by_adapter(erp_action->adapter)); 3328 zfcp_fsf_req_free(fsf_req); 3329 erp_action->fsf_req = NULL; 3330 goto out; 3331 } 3332 3333 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " 3334 "port 0x%016Lx, unit 0x%016Lx)\n", 3335 zfcp_get_busid_by_adapter(erp_action->adapter), 3336 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3337 out: 3338 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3339 lock_flags); 3340 return retval; 3341 } 3342 3343 /* 3344 * function: zfcp_fsf_close_unit_handler 3345 * 3346 * purpose: is called for finished Close LUN FSF command 3347 * 3348 * returns: 3349 */ 3350 static int 3351 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) 3352 { 3353 int retval = -EINVAL; 3354 struct zfcp_unit *unit; 3355 3356 unit = (struct zfcp_unit *) fsf_req->data; 3357 3358 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3359 /* don't change unit status in our bookkeeping */ 3360 goto skip_fsfstatus; 3361 } 3362 3363 /* evaluate FSF status in QTCB */ 3364 switch (fsf_req->qtcb->header.fsf_status) { 3365 3366 case FSF_PORT_HANDLE_NOT_VALID: 3367 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3368 "0x%016Lx on adapter %s invalid. This may " 3369 "happen in rare circumstances\n", 3370 unit->port->handle, 3371 unit->port->wwpn, 3372 zfcp_get_busid_by_unit(unit)); 3373 ZFCP_LOG_DEBUG("status qualifier:\n"); 3374 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3375 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3376 sizeof (union fsf_status_qual)); 3377 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3378 "fsf_s_phand_nv"); 3379 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3380 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3381 break; 3382 3383 case FSF_LUN_HANDLE_NOT_VALID: 3384 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " 3385 "0x%016Lx on port 0x%016Lx on adapter %s is " 3386 "invalid. This may happen occasionally.\n", 3387 unit->handle, 3388 unit->fcp_lun, 3389 unit->port->wwpn, 3390 zfcp_get_busid_by_unit(unit)); 3391 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 3392 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3393 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3394 sizeof (union fsf_status_qual)); 3395 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3396 "fsf_s_lhand_nv"); 3397 zfcp_erp_port_reopen(unit->port, 0); 3398 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3399 break; 3400 3401 case FSF_PORT_BOXED: 3402 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3403 "needs to be reopened\n", 3404 unit->port->wwpn, 3405 zfcp_get_busid_by_unit(unit)); 3406 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3407 zfcp_erp_port_boxed(unit->port); 3408 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3409 ZFCP_STATUS_FSFREQ_RETRY; 3410 break; 3411 3412 case FSF_ADAPTER_STATUS_AVAILABLE: 3413 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 3414 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3415 /* re-establish link to port */ 3416 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3417 "fsf_sq_ltest"); 3418 zfcp_test_link(unit->port); 3419 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3420 break; 3421 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3422 /* ERP strategy will escalate */ 3423 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3424 "fsf_sq_ulp"); 3425 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3426 break; 3427 default: 3428 ZFCP_LOG_NORMAL 3429 ("bug: Wrong status qualifier 0x%x arrived.\n", 3430 fsf_req->qtcb->header.fsf_status_qual.word[0]); 3431 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3432 "fsf_sq_inval:"); 3433 debug_exception( 3434 fsf_req->adapter->erp_dbf, 0, 3435 &fsf_req->qtcb->header.fsf_status_qual.word[0], 3436 sizeof (u32)); 3437 break; 3438 } 3439 break; 3440 3441 case FSF_GOOD: 3442 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " 3443 "closed, port handle 0x%x\n", 3444 unit->fcp_lun, 3445 unit->port->wwpn, 3446 zfcp_get_busid_by_unit(unit), 3447 unit->handle); 3448 /* mark unit as closed */ 3449 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3450 retval = 0; 3451 break; 3452 3453 default: 3454 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3455 "(debug info 0x%x)\n", 3456 fsf_req->qtcb->header.fsf_status); 3457 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3458 debug_exception(fsf_req->adapter->erp_dbf, 0, 3459 &fsf_req->qtcb->header.fsf_status, 3460 sizeof (u32)); 3461 break; 3462 } 3463 3464 skip_fsfstatus: 3465 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); 3466 return retval; 3467 } 3468 3469 /** 3470 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) 3471 * @adapter: adapter where scsi command is issued 3472 * @unit: unit where command is sent to 3473 * @scsi_cmnd: scsi command to be sent 3474 * @timer: timer to be started when request is initiated 3475 * @req_flags: flags for fsf_request 3476 */ 3477 int 3478 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, 3479 struct zfcp_unit *unit, 3480 struct scsi_cmnd * scsi_cmnd, 3481 int use_timer, int req_flags) 3482 { 3483 struct zfcp_fsf_req *fsf_req = NULL; 3484 struct fcp_cmnd_iu *fcp_cmnd_iu; 3485 unsigned int sbtype; 3486 unsigned long lock_flags; 3487 int real_bytes = 0; 3488 int retval = 0; 3489 int mask; 3490 3491 /* setup new FSF request */ 3492 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3493 adapter->pool.fsf_req_scsi, 3494 &lock_flags, &fsf_req); 3495 if (unlikely(retval < 0)) { 3496 ZFCP_LOG_DEBUG("error: Could not create FCP command request " 3497 "for unit 0x%016Lx on port 0x%016Lx on " 3498 "adapter %s\n", 3499 unit->fcp_lun, 3500 unit->port->wwpn, 3501 zfcp_get_busid_by_adapter(adapter)); 3502 goto failed_req_create; 3503 } 3504 3505 zfcp_unit_get(unit); 3506 fsf_req->unit = unit; 3507 3508 /* associate FSF request with SCSI request (for look up on abort) */ 3509 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id; 3510 3511 /* associate SCSI command with FSF request */ 3512 fsf_req->data = (unsigned long) scsi_cmnd; 3513 3514 /* set handles of unit and its parent port in QTCB */ 3515 fsf_req->qtcb->header.lun_handle = unit->handle; 3516 fsf_req->qtcb->header.port_handle = unit->port->handle; 3517 3518 /* FSF does not define the structure of the FCP_CMND IU */ 3519 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3520 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3521 3522 /* 3523 * set depending on data direction: 3524 * data direction bits in SBALE (SB Type) 3525 * data direction bits in QTCB 3526 * data direction bits in FCP_CMND IU 3527 */ 3528 switch (scsi_cmnd->sc_data_direction) { 3529 case DMA_NONE: 3530 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3531 /* 3532 * FIXME(qdio): 3533 * what is the correct type for commands 3534 * without 'real' data buffers? 3535 */ 3536 sbtype = SBAL_FLAGS0_TYPE_READ; 3537 break; 3538 case DMA_FROM_DEVICE: 3539 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; 3540 sbtype = SBAL_FLAGS0_TYPE_READ; 3541 fcp_cmnd_iu->rddata = 1; 3542 break; 3543 case DMA_TO_DEVICE: 3544 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; 3545 sbtype = SBAL_FLAGS0_TYPE_WRITE; 3546 fcp_cmnd_iu->wddata = 1; 3547 break; 3548 case DMA_BIDIRECTIONAL: 3549 default: 3550 /* 3551 * dummy, catch this condition earlier 3552 * in zfcp_scsi_queuecommand 3553 */ 3554 goto failed_scsi_cmnd; 3555 } 3556 3557 /* set FC service class in QTCB (3 per default) */ 3558 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; 3559 3560 /* set FCP_LUN in FCP_CMND IU in QTCB */ 3561 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3562 3563 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; 3564 3565 /* set task attributes in FCP_CMND IU in QTCB */ 3566 if (likely((scsi_cmnd->device->simple_tags) || 3567 (atomic_test_mask(mask, &unit->status)))) 3568 fcp_cmnd_iu->task_attribute = SIMPLE_Q; 3569 else 3570 fcp_cmnd_iu->task_attribute = UNTAGGED; 3571 3572 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ 3573 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { 3574 fcp_cmnd_iu->add_fcp_cdb_length 3575 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; 3576 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " 3577 "additional FCP_CDB length is 0x%x " 3578 "(shifted right 2 bits)\n", 3579 scsi_cmnd->cmd_len, 3580 fcp_cmnd_iu->add_fcp_cdb_length); 3581 } 3582 /* 3583 * copy SCSI CDB (including additional length, if any) to 3584 * FCP_CDB in FCP_CMND IU in QTCB 3585 */ 3586 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3587 3588 /* FCP CMND IU length in QTCB */ 3589 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3590 sizeof (struct fcp_cmnd_iu) + 3591 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); 3592 3593 /* generate SBALEs from data buffer */ 3594 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); 3595 if (unlikely(real_bytes < 0)) { 3596 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { 3597 ZFCP_LOG_DEBUG( 3598 "Data did not fit into available buffer(s), " 3599 "waiting for more...\n"); 3600 retval = -EIO; 3601 } else { 3602 ZFCP_LOG_NORMAL("error: No truncation implemented but " 3603 "required. Shutting down unit " 3604 "(adapter %s, port 0x%016Lx, " 3605 "unit 0x%016Lx)\n", 3606 zfcp_get_busid_by_unit(unit), 3607 unit->port->wwpn, 3608 unit->fcp_lun); 3609 zfcp_erp_unit_shutdown(unit, 0); 3610 retval = -EINVAL; 3611 } 3612 goto no_fit; 3613 } 3614 3615 /* set length of FCP data length in FCP_CMND IU in QTCB */ 3616 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); 3617 3618 ZFCP_LOG_DEBUG("Sending SCSI command:\n"); 3619 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3620 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3621 3622 if (use_timer) 3623 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 3624 3625 retval = zfcp_fsf_req_send(fsf_req); 3626 if (unlikely(retval < 0)) { 3627 ZFCP_LOG_INFO("error: Could not send FCP command request " 3628 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 3629 zfcp_get_busid_by_adapter(adapter), 3630 unit->port->wwpn, 3631 unit->fcp_lun); 3632 goto send_failed; 3633 } 3634 3635 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " 3636 "port 0x%016Lx, unit 0x%016Lx)\n", 3637 zfcp_get_busid_by_adapter(adapter), 3638 unit->port->wwpn, 3639 unit->fcp_lun); 3640 goto success; 3641 3642 send_failed: 3643 no_fit: 3644 failed_scsi_cmnd: 3645 zfcp_unit_put(unit); 3646 zfcp_fsf_req_free(fsf_req); 3647 fsf_req = NULL; 3648 scsi_cmnd->host_scribble = NULL; 3649 success: 3650 failed_req_create: 3651 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3652 return retval; 3653 } 3654 3655 struct zfcp_fsf_req * 3656 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, 3657 struct zfcp_unit *unit, 3658 u8 tm_flags, int req_flags) 3659 { 3660 struct zfcp_fsf_req *fsf_req = NULL; 3661 int retval = 0; 3662 struct fcp_cmnd_iu *fcp_cmnd_iu; 3663 unsigned long lock_flags; 3664 volatile struct qdio_buffer_element *sbale; 3665 3666 /* setup new FSF request */ 3667 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3668 adapter->pool.fsf_req_scsi, 3669 &lock_flags, &fsf_req); 3670 if (retval < 0) { 3671 ZFCP_LOG_INFO("error: Could not create FCP command (task " 3672 "management) request for adapter %s, port " 3673 " 0x%016Lx, unit 0x%016Lx.\n", 3674 zfcp_get_busid_by_adapter(adapter), 3675 unit->port->wwpn, unit->fcp_lun); 3676 goto out; 3677 } 3678 3679 /* 3680 * Used to decide on proper handler in the return path, 3681 * could be either zfcp_fsf_send_fcp_command_task_handler or 3682 * zfcp_fsf_send_fcp_command_task_management_handler */ 3683 3684 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; 3685 3686 /* 3687 * hold a pointer to the unit being target of this 3688 * task management request 3689 */ 3690 fsf_req->data = (unsigned long) unit; 3691 3692 /* set FSF related fields in QTCB */ 3693 fsf_req->qtcb->header.lun_handle = unit->handle; 3694 fsf_req->qtcb->header.port_handle = unit->port->handle; 3695 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3696 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; 3697 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3698 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); 3699 3700 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3701 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; 3702 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3703 3704 /* set FCP related fields in FCP_CMND IU in QTCB */ 3705 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3706 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3707 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3708 fcp_cmnd_iu->task_management_flags = tm_flags; 3709 3710 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); 3711 retval = zfcp_fsf_req_send(fsf_req); 3712 if (retval) { 3713 ZFCP_LOG_INFO("error: Could not send an FCP-command (task " 3714 "management) on adapter %s, port 0x%016Lx for " 3715 "unit LUN 0x%016Lx\n", 3716 zfcp_get_busid_by_adapter(adapter), 3717 unit->port->wwpn, 3718 unit->fcp_lun); 3719 zfcp_fsf_req_free(fsf_req); 3720 fsf_req = NULL; 3721 goto out; 3722 } 3723 3724 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " 3725 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " 3726 "tm_flags=0x%x)\n", 3727 zfcp_get_busid_by_adapter(adapter), 3728 unit->port->wwpn, 3729 unit->fcp_lun, 3730 tm_flags); 3731 out: 3732 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3733 return fsf_req; 3734 } 3735 3736 /* 3737 * function: zfcp_fsf_send_fcp_command_handler 3738 * 3739 * purpose: is called for finished Send FCP Command 3740 * 3741 * returns: 3742 */ 3743 static int 3744 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 3745 { 3746 int retval = -EINVAL; 3747 struct zfcp_unit *unit; 3748 struct fsf_qtcb_header *header; 3749 u16 subtable, rule, counter; 3750 3751 header = &fsf_req->qtcb->header; 3752 3753 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) 3754 unit = (struct zfcp_unit *) fsf_req->data; 3755 else 3756 unit = fsf_req->unit; 3757 3758 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 3759 /* go directly to calls of special handlers */ 3760 goto skip_fsfstatus; 3761 } 3762 3763 /* evaluate FSF status in QTCB */ 3764 switch (header->fsf_status) { 3765 3766 case FSF_PORT_HANDLE_NOT_VALID: 3767 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3768 "0x%016Lx on adapter %s invalid\n", 3769 unit->port->handle, 3770 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3771 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3772 (char *) &header->fsf_status_qual, 3773 sizeof (union fsf_status_qual)); 3774 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3775 "fsf_s_phand_nv"); 3776 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3777 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3778 break; 3779 3780 case FSF_LUN_HANDLE_NOT_VALID: 3781 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " 3782 "0x%016Lx on port 0x%016Lx on adapter %s is " 3783 "invalid. This may happen occasionally.\n", 3784 unit->handle, 3785 unit->fcp_lun, 3786 unit->port->wwpn, 3787 zfcp_get_busid_by_unit(unit)); 3788 ZFCP_LOG_NORMAL("Status qualifier data:\n"); 3789 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3790 (char *) &header->fsf_status_qual, 3791 sizeof (union fsf_status_qual)); 3792 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3793 "fsf_s_uhand_nv"); 3794 zfcp_erp_port_reopen(unit->port, 0); 3795 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3796 break; 3797 3798 case FSF_HANDLE_MISMATCH: 3799 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " 3800 "unexpectedly. (adapter %s, port 0x%016Lx, " 3801 "unit 0x%016Lx)\n", 3802 unit->port->handle, 3803 zfcp_get_busid_by_unit(unit), 3804 unit->port->wwpn, 3805 unit->fcp_lun); 3806 ZFCP_LOG_NORMAL("status qualifier:\n"); 3807 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3808 (char *) &header->fsf_status_qual, 3809 sizeof (union fsf_status_qual)); 3810 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3811 "fsf_s_hand_mis"); 3812 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3813 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3814 break; 3815 3816 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 3817 ZFCP_LOG_INFO("error: adapter %s does not support fc " 3818 "class %d.\n", 3819 zfcp_get_busid_by_unit(unit), 3820 ZFCP_FC_SERVICE_CLASS_DEFAULT); 3821 /* stop operation for this adapter */ 3822 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 3823 "fsf_s_class_nsup"); 3824 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3825 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3826 break; 3827 3828 case FSF_FCPLUN_NOT_VALID: 3829 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " 3830 "adapter %s does not have correct unit " 3831 "handle 0x%x\n", 3832 unit->fcp_lun, 3833 unit->port->wwpn, 3834 zfcp_get_busid_by_unit(unit), 3835 unit->handle); 3836 ZFCP_LOG_DEBUG("status qualifier:\n"); 3837 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3838 (char *) &header->fsf_status_qual, 3839 sizeof (union fsf_status_qual)); 3840 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3841 "fsf_s_fcp_lun_nv"); 3842 zfcp_erp_port_reopen(unit->port, 0); 3843 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3844 break; 3845 3846 case FSF_ACCESS_DENIED: 3847 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " 3848 "unit 0x%016Lx on port 0x%016Lx on " 3849 "adapter %s\n", unit->fcp_lun, unit->port->wwpn, 3850 zfcp_get_busid_by_unit(unit)); 3851 for (counter = 0; counter < 2; counter++) { 3852 subtable = header->fsf_status_qual.halfword[counter * 2]; 3853 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3854 switch (subtable) { 3855 case FSF_SQ_CFDC_SUBTABLE_OS: 3856 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3857 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3858 case FSF_SQ_CFDC_SUBTABLE_LUN: 3859 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3860 zfcp_act_subtable_type[subtable], rule); 3861 break; 3862 } 3863 } 3864 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 3865 zfcp_erp_unit_access_denied(unit); 3866 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3867 break; 3868 3869 case FSF_DIRECTION_INDICATOR_NOT_VALID: 3870 ZFCP_LOG_INFO("bug: Invalid data direction given for unit " 3871 "0x%016Lx on port 0x%016Lx on adapter %s " 3872 "(debug info %d)\n", 3873 unit->fcp_lun, 3874 unit->port->wwpn, 3875 zfcp_get_busid_by_unit(unit), 3876 fsf_req->qtcb->bottom.io.data_direction); 3877 /* stop operation for this adapter */ 3878 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3879 "fsf_s_dir_ind_nv"); 3880 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3881 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3882 break; 3883 3884 case FSF_CMND_LENGTH_NOT_VALID: 3885 ZFCP_LOG_NORMAL 3886 ("bug: An invalid control-data-block length field " 3887 "was found in a command for unit 0x%016Lx on port " 3888 "0x%016Lx on adapter %s " "(debug info %d)\n", 3889 unit->fcp_lun, unit->port->wwpn, 3890 zfcp_get_busid_by_unit(unit), 3891 fsf_req->qtcb->bottom.io.fcp_cmnd_length); 3892 /* stop operation for this adapter */ 3893 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3894 "fsf_s_cmd_len_nv"); 3895 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3896 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3897 break; 3898 3899 case FSF_PORT_BOXED: 3900 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3901 "needs to be reopened\n", 3902 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3903 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3904 zfcp_erp_port_boxed(unit->port); 3905 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3906 ZFCP_STATUS_FSFREQ_RETRY; 3907 break; 3908 3909 case FSF_LUN_BOXED: 3910 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " 3911 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", 3912 zfcp_get_busid_by_unit(unit), 3913 unit->port->wwpn, unit->fcp_lun); 3914 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 3915 zfcp_erp_unit_boxed(unit); 3916 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 3917 | ZFCP_STATUS_FSFREQ_RETRY; 3918 break; 3919 3920 case FSF_ADAPTER_STATUS_AVAILABLE: 3921 switch (header->fsf_status_qual.word[0]) { 3922 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3923 /* re-establish link to port */ 3924 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3925 "fsf_sq_ltest"); 3926 zfcp_test_link(unit->port); 3927 break; 3928 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3929 /* FIXME(hw) need proper specs for proper action */ 3930 /* let scsi stack deal with retries and escalation */ 3931 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3932 "fsf_sq_ulp"); 3933 break; 3934 default: 3935 ZFCP_LOG_NORMAL 3936 ("Unknown status qualifier 0x%x arrived.\n", 3937 header->fsf_status_qual.word[0]); 3938 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3939 "fsf_sq_inval:"); 3940 debug_exception(fsf_req->adapter->erp_dbf, 0, 3941 &header->fsf_status_qual.word[0], 3942 sizeof(u32)); 3943 break; 3944 } 3945 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3946 break; 3947 3948 case FSF_GOOD: 3949 break; 3950 3951 case FSF_FCP_RSP_AVAILABLE: 3952 break; 3953 3954 default: 3955 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3956 debug_exception(fsf_req->adapter->erp_dbf, 0, 3957 &header->fsf_status, sizeof(u32)); 3958 break; 3959 } 3960 3961 skip_fsfstatus: 3962 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { 3963 retval = 3964 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); 3965 } else { 3966 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); 3967 fsf_req->unit = NULL; 3968 zfcp_unit_put(unit); 3969 } 3970 return retval; 3971 } 3972 3973 /* 3974 * function: zfcp_fsf_send_fcp_command_task_handler 3975 * 3976 * purpose: evaluates FCP_RSP IU 3977 * 3978 * returns: 3979 */ 3980 static int 3981 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) 3982 { 3983 int retval = 0; 3984 struct scsi_cmnd *scpnt; 3985 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 3986 &(fsf_req->qtcb->bottom.io.fcp_rsp); 3987 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3988 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3989 u32 sns_len; 3990 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 3991 unsigned long flags; 3992 struct zfcp_unit *unit = fsf_req->unit; 3993 3994 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); 3995 scpnt = (struct scsi_cmnd *) fsf_req->data; 3996 if (unlikely(!scpnt)) { 3997 ZFCP_LOG_DEBUG 3998 ("Command with fsf_req %p is not associated to " 3999 "a scsi command anymore. Aborted?\n", fsf_req); 4000 goto out; 4001 } 4002 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { 4003 /* FIXME: (design) mid-layer should handle DID_ABORT like 4004 * DID_SOFT_ERROR by retrying the request for devices 4005 * that allow retries. 4006 */ 4007 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); 4008 set_host_byte(&scpnt->result, DID_SOFT_ERROR); 4009 set_driver_byte(&scpnt->result, SUGGEST_RETRY); 4010 goto skip_fsfstatus; 4011 } 4012 4013 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 4014 ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); 4015 set_host_byte(&scpnt->result, DID_ERROR); 4016 goto skip_fsfstatus; 4017 } 4018 4019 /* set message byte of result in SCSI command */ 4020 scpnt->result |= COMMAND_COMPLETE << 8; 4021 4022 /* 4023 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte 4024 * of result in SCSI command 4025 */ 4026 scpnt->result |= fcp_rsp_iu->scsi_status; 4027 if (unlikely(fcp_rsp_iu->scsi_status)) { 4028 /* DEBUG */ 4029 ZFCP_LOG_DEBUG("status for SCSI Command:\n"); 4030 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4031 scpnt->cmnd, scpnt->cmd_len); 4032 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", 4033 fcp_rsp_iu->scsi_status); 4034 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4035 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); 4036 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4037 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), 4038 fcp_rsp_iu->fcp_sns_len); 4039 } 4040 4041 /* check FCP_RSP_INFO */ 4042 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { 4043 ZFCP_LOG_DEBUG("rsp_len is valid\n"); 4044 switch (fcp_rsp_info[3]) { 4045 case RSP_CODE_GOOD: 4046 /* ok, continue */ 4047 ZFCP_LOG_TRACE("no failure or Task Management " 4048 "Function complete\n"); 4049 set_host_byte(&scpnt->result, DID_OK); 4050 break; 4051 case RSP_CODE_LENGTH_MISMATCH: 4052 /* hardware bug */ 4053 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4054 "that the fibrechannel protocol data " 4055 "length differs from the burst length. " 4056 "The problem occured on unit 0x%016Lx " 4057 "on port 0x%016Lx on adapter %s", 4058 unit->fcp_lun, 4059 unit->port->wwpn, 4060 zfcp_get_busid_by_unit(unit)); 4061 /* dump SCSI CDB as prepared by zfcp */ 4062 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4063 (char *) &fsf_req->qtcb-> 4064 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4065 set_host_byte(&scpnt->result, DID_ERROR); 4066 goto skip_fsfstatus; 4067 case RSP_CODE_FIELD_INVALID: 4068 /* driver or hardware bug */ 4069 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4070 "that the fibrechannel protocol data " 4071 "fields were incorrectly set up. " 4072 "The problem occured on the unit " 4073 "0x%016Lx on port 0x%016Lx on " 4074 "adapter %s", 4075 unit->fcp_lun, 4076 unit->port->wwpn, 4077 zfcp_get_busid_by_unit(unit)); 4078 /* dump SCSI CDB as prepared by zfcp */ 4079 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4080 (char *) &fsf_req->qtcb-> 4081 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4082 set_host_byte(&scpnt->result, DID_ERROR); 4083 goto skip_fsfstatus; 4084 case RSP_CODE_RO_MISMATCH: 4085 /* hardware bug */ 4086 ZFCP_LOG_NORMAL("bug: The FCP response code indicates " 4087 "that conflicting values for the " 4088 "fibrechannel payload offset from the " 4089 "header were found. " 4090 "The problem occured on unit 0x%016Lx " 4091 "on port 0x%016Lx on adapter %s.\n", 4092 unit->fcp_lun, 4093 unit->port->wwpn, 4094 zfcp_get_busid_by_unit(unit)); 4095 /* dump SCSI CDB as prepared by zfcp */ 4096 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4097 (char *) &fsf_req->qtcb-> 4098 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4099 set_host_byte(&scpnt->result, DID_ERROR); 4100 goto skip_fsfstatus; 4101 default: 4102 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4103 "code was detected for a command. " 4104 "The problem occured on the unit " 4105 "0x%016Lx on port 0x%016Lx on " 4106 "adapter %s (debug info 0x%x)\n", 4107 unit->fcp_lun, 4108 unit->port->wwpn, 4109 zfcp_get_busid_by_unit(unit), 4110 fcp_rsp_info[3]); 4111 /* dump SCSI CDB as prepared by zfcp */ 4112 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4113 (char *) &fsf_req->qtcb-> 4114 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4115 set_host_byte(&scpnt->result, DID_ERROR); 4116 goto skip_fsfstatus; 4117 } 4118 } 4119 4120 /* check for sense data */ 4121 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { 4122 sns_len = FSF_FCP_RSP_SIZE - 4123 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; 4124 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", 4125 sns_len); 4126 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); 4127 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", 4128 SCSI_SENSE_BUFFERSIZE); 4129 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); 4130 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", 4131 scpnt->result); 4132 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4133 (void *) &scpnt->cmnd, scpnt->cmd_len); 4134 4135 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", 4136 fcp_rsp_iu->fcp_sns_len); 4137 memcpy(&scpnt->sense_buffer, 4138 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); 4139 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4140 (void *) &scpnt->sense_buffer, sns_len); 4141 } 4142 4143 /* check for overrun */ 4144 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { 4145 ZFCP_LOG_INFO("A data overrun was detected for a command. " 4146 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4147 "The response data length is " 4148 "%d, the original length was %d.\n", 4149 unit->fcp_lun, 4150 unit->port->wwpn, 4151 zfcp_get_busid_by_unit(unit), 4152 fcp_rsp_iu->fcp_resid, 4153 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4154 } 4155 4156 /* check for underrun */ 4157 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { 4158 ZFCP_LOG_INFO("A data underrun was detected for a command. " 4159 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4160 "The response data length is " 4161 "%d, the original length was %d.\n", 4162 unit->fcp_lun, 4163 unit->port->wwpn, 4164 zfcp_get_busid_by_unit(unit), 4165 fcp_rsp_iu->fcp_resid, 4166 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4167 4168 scpnt->resid = fcp_rsp_iu->fcp_resid; 4169 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) 4170 set_host_byte(&scpnt->result, DID_ERROR); 4171 } 4172 4173 skip_fsfstatus: 4174 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); 4175 4176 if (scpnt->result != 0) 4177 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); 4178 else if (scpnt->retries > 0) 4179 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); 4180 else 4181 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req); 4182 4183 /* cleanup pointer (need this especially for abort) */ 4184 scpnt->host_scribble = NULL; 4185 4186 /* always call back */ 4187 (scpnt->scsi_done) (scpnt); 4188 4189 /* 4190 * We must hold this lock until scsi_done has been called. 4191 * Otherwise we may call scsi_done after abort regarding this 4192 * command has completed. 4193 * Note: scsi_done must not block! 4194 */ 4195 out: 4196 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); 4197 return retval; 4198 } 4199 4200 /* 4201 * function: zfcp_fsf_send_fcp_command_task_management_handler 4202 * 4203 * purpose: evaluates FCP_RSP IU 4204 * 4205 * returns: 4206 */ 4207 static int 4208 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) 4209 { 4210 int retval = 0; 4211 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4212 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4213 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4214 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data; 4215 4216 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4217 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4218 goto skip_fsfstatus; 4219 } 4220 4221 /* check FCP_RSP_INFO */ 4222 switch (fcp_rsp_info[3]) { 4223 case RSP_CODE_GOOD: 4224 /* ok, continue */ 4225 ZFCP_LOG_DEBUG("no failure or Task Management " 4226 "Function complete\n"); 4227 break; 4228 case RSP_CODE_TASKMAN_UNSUPP: 4229 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4230 "is not supported on the target device " 4231 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", 4232 unit->fcp_lun, 4233 unit->port->wwpn, 4234 zfcp_get_busid_by_unit(unit)); 4235 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; 4236 break; 4237 case RSP_CODE_TASKMAN_FAILED: 4238 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4239 "failed to complete successfully. " 4240 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", 4241 unit->fcp_lun, 4242 unit->port->wwpn, 4243 zfcp_get_busid_by_unit(unit)); 4244 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4245 break; 4246 default: 4247 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4248 "code was detected for a command. " 4249 "unit 0x%016Lx, port 0x%016Lx, adapter %s " 4250 "(debug info 0x%x)\n", 4251 unit->fcp_lun, 4252 unit->port->wwpn, 4253 zfcp_get_busid_by_unit(unit), 4254 fcp_rsp_info[3]); 4255 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4256 } 4257 4258 skip_fsfstatus: 4259 return retval; 4260 } 4261 4262 4263 /* 4264 * function: zfcp_fsf_control_file 4265 * 4266 * purpose: Initiator of the control file upload/download FSF requests 4267 * 4268 * returns: 0 - FSF request is successfuly created and queued 4269 * -EOPNOTSUPP - The FCP adapter does not have Control File support 4270 * -EINVAL - Invalid direction specified 4271 * -ENOMEM - Insufficient memory 4272 * -EPERM - Cannot create FSF request or place it in QDIO queue 4273 */ 4274 int 4275 zfcp_fsf_control_file(struct zfcp_adapter *adapter, 4276 struct zfcp_fsf_req **fsf_req_ptr, 4277 u32 fsf_command, 4278 u32 option, 4279 struct zfcp_sg_list *sg_list) 4280 { 4281 struct zfcp_fsf_req *fsf_req; 4282 struct fsf_qtcb_bottom_support *bottom; 4283 volatile struct qdio_buffer_element *sbale; 4284 unsigned long lock_flags; 4285 int req_flags = 0; 4286 int direction; 4287 int retval = 0; 4288 4289 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) { 4290 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", 4291 zfcp_get_busid_by_adapter(adapter)); 4292 retval = -EOPNOTSUPP; 4293 goto out; 4294 } 4295 4296 switch (fsf_command) { 4297 4298 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 4299 direction = SBAL_FLAGS0_TYPE_WRITE; 4300 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && 4301 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) 4302 req_flags = ZFCP_WAIT_FOR_SBAL; 4303 break; 4304 4305 case FSF_QTCB_UPLOAD_CONTROL_FILE: 4306 direction = SBAL_FLAGS0_TYPE_READ; 4307 break; 4308 4309 default: 4310 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); 4311 retval = -EINVAL; 4312 goto out; 4313 } 4314 4315 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, 4316 NULL, &lock_flags, &fsf_req); 4317 if (retval < 0) { 4318 ZFCP_LOG_INFO("error: Could not create FSF request for the " 4319 "adapter %s\n", 4320 zfcp_get_busid_by_adapter(adapter)); 4321 retval = -EPERM; 4322 goto unlock_queue_lock; 4323 } 4324 4325 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4326 sbale[0].flags |= direction; 4327 4328 bottom = &fsf_req->qtcb->bottom.support; 4329 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; 4330 bottom->option = option; 4331 4332 if (sg_list->count > 0) { 4333 int bytes; 4334 4335 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, 4336 sg_list->sg, sg_list->count, 4337 ZFCP_MAX_SBALS_PER_REQ); 4338 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { 4339 ZFCP_LOG_INFO( 4340 "error: Could not create sufficient number of " 4341 "SBALS for an FSF request to the adapter %s\n", 4342 zfcp_get_busid_by_adapter(adapter)); 4343 retval = -ENOMEM; 4344 goto free_fsf_req; 4345 } 4346 } else 4347 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 4348 4349 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 4350 retval = zfcp_fsf_req_send(fsf_req); 4351 if (retval < 0) { 4352 ZFCP_LOG_INFO("initiation of cfdc up/download failed" 4353 "(adapter %s)\n", 4354 zfcp_get_busid_by_adapter(adapter)); 4355 retval = -EPERM; 4356 goto free_fsf_req; 4357 } 4358 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4359 4360 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " 4361 "adapter %s\n", 4362 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? 4363 "download" : "upload", 4364 zfcp_get_busid_by_adapter(adapter)); 4365 4366 wait_event(fsf_req->completion_wq, 4367 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4368 4369 *fsf_req_ptr = fsf_req; 4370 goto out; 4371 4372 free_fsf_req: 4373 zfcp_fsf_req_free(fsf_req); 4374 unlock_queue_lock: 4375 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4376 out: 4377 return retval; 4378 } 4379 4380 4381 /* 4382 * function: zfcp_fsf_control_file_handler 4383 * 4384 * purpose: Handler of the control file upload/download FSF requests 4385 * 4386 * returns: 0 - FSF request successfuly processed 4387 * -EAGAIN - Operation has to be repeated because of a temporary problem 4388 * -EACCES - There is no permission to execute an operation 4389 * -EPERM - The control file is not in a right format 4390 * -EIO - There is a problem with the FCP adapter 4391 * -EINVAL - Invalid operation 4392 * -EFAULT - User space memory I/O operation fault 4393 */ 4394 static int 4395 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) 4396 { 4397 struct zfcp_adapter *adapter = fsf_req->adapter; 4398 struct fsf_qtcb_header *header = &fsf_req->qtcb->header; 4399 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; 4400 int retval = 0; 4401 4402 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4403 retval = -EINVAL; 4404 goto skip_fsfstatus; 4405 } 4406 4407 switch (header->fsf_status) { 4408 4409 case FSF_GOOD: 4410 ZFCP_LOG_NORMAL( 4411 "The FSF request has been successfully completed " 4412 "on the adapter %s\n", 4413 zfcp_get_busid_by_adapter(adapter)); 4414 break; 4415 4416 case FSF_OPERATION_PARTIALLY_SUCCESSFUL: 4417 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { 4418 switch (header->fsf_status_qual.word[0]) { 4419 4420 case FSF_SQ_CFDC_HARDENED_ON_SE: 4421 ZFCP_LOG_NORMAL( 4422 "CFDC on the adapter %s has being " 4423 "hardened on primary and secondary SE\n", 4424 zfcp_get_busid_by_adapter(adapter)); 4425 break; 4426 4427 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: 4428 ZFCP_LOG_NORMAL( 4429 "CFDC of the adapter %s could not " 4430 "be saved on the SE\n", 4431 zfcp_get_busid_by_adapter(adapter)); 4432 break; 4433 4434 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: 4435 ZFCP_LOG_NORMAL( 4436 "CFDC of the adapter %s could not " 4437 "be copied to the secondary SE\n", 4438 zfcp_get_busid_by_adapter(adapter)); 4439 break; 4440 4441 default: 4442 ZFCP_LOG_NORMAL( 4443 "CFDC could not be hardened " 4444 "on the adapter %s\n", 4445 zfcp_get_busid_by_adapter(adapter)); 4446 } 4447 } 4448 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4449 retval = -EAGAIN; 4450 break; 4451 4452 case FSF_AUTHORIZATION_FAILURE: 4453 ZFCP_LOG_NORMAL( 4454 "Adapter %s does not accept privileged commands\n", 4455 zfcp_get_busid_by_adapter(adapter)); 4456 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4457 retval = -EACCES; 4458 break; 4459 4460 case FSF_CFDC_ERROR_DETECTED: 4461 ZFCP_LOG_NORMAL( 4462 "Error at position %d in the CFDC, " 4463 "CFDC is discarded by the adapter %s\n", 4464 header->fsf_status_qual.word[0], 4465 zfcp_get_busid_by_adapter(adapter)); 4466 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4467 retval = -EPERM; 4468 break; 4469 4470 case FSF_CONTROL_FILE_UPDATE_ERROR: 4471 ZFCP_LOG_NORMAL( 4472 "Adapter %s cannot harden the control file, " 4473 "file is discarded\n", 4474 zfcp_get_busid_by_adapter(adapter)); 4475 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4476 retval = -EIO; 4477 break; 4478 4479 case FSF_CONTROL_FILE_TOO_LARGE: 4480 ZFCP_LOG_NORMAL( 4481 "Control file is too large, file is discarded " 4482 "by the adapter %s\n", 4483 zfcp_get_busid_by_adapter(adapter)); 4484 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4485 retval = -EIO; 4486 break; 4487 4488 case FSF_ACCESS_CONFLICT_DETECTED: 4489 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4490 ZFCP_LOG_NORMAL( 4491 "CFDC has been discarded by the adapter %s, " 4492 "because activation would impact " 4493 "%d active connection(s)\n", 4494 zfcp_get_busid_by_adapter(adapter), 4495 header->fsf_status_qual.word[0]); 4496 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4497 retval = -EIO; 4498 break; 4499 4500 case FSF_CONFLICTS_OVERRULED: 4501 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4502 ZFCP_LOG_NORMAL( 4503 "CFDC has been activated on the adapter %s, " 4504 "but activation has impacted " 4505 "%d active connection(s)\n", 4506 zfcp_get_busid_by_adapter(adapter), 4507 header->fsf_status_qual.word[0]); 4508 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4509 retval = -EIO; 4510 break; 4511 4512 case FSF_UNKNOWN_OP_SUBTYPE: 4513 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " 4514 "op_subtype=0x%x)\n", 4515 zfcp_get_busid_by_adapter(adapter), 4516 bottom->operation_subtype); 4517 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4518 retval = -EINVAL; 4519 break; 4520 4521 case FSF_INVALID_COMMAND_OPTION: 4522 ZFCP_LOG_NORMAL( 4523 "Invalid option 0x%x has been specified " 4524 "in QTCB bottom sent to the adapter %s\n", 4525 bottom->option, 4526 zfcp_get_busid_by_adapter(adapter)); 4527 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4528 retval = -EINVAL; 4529 break; 4530 4531 default: 4532 ZFCP_LOG_NORMAL( 4533 "bug: An unknown/unexpected FSF status 0x%08x " 4534 "was presented on the adapter %s\n", 4535 header->fsf_status, 4536 zfcp_get_busid_by_adapter(adapter)); 4537 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); 4538 debug_exception(fsf_req->adapter->erp_dbf, 0, 4539 &header->fsf_status_qual.word[0], sizeof(u32)); 4540 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4541 retval = -EINVAL; 4542 break; 4543 } 4544 4545 skip_fsfstatus: 4546 return retval; 4547 } 4548 4549 static inline int 4550 zfcp_fsf_req_sbal_check(unsigned long *flags, 4551 struct zfcp_qdio_queue *queue, int needed) 4552 { 4553 write_lock_irqsave(&queue->queue_lock, *flags); 4554 if (likely(atomic_read(&queue->free_count) >= needed)) 4555 return 1; 4556 write_unlock_irqrestore(&queue->queue_lock, *flags); 4557 return 0; 4558 } 4559 4560 /* 4561 * set qtcb pointer in fsf_req and initialize QTCB 4562 */ 4563 static void 4564 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) 4565 { 4566 if (likely(fsf_req->qtcb != NULL)) { 4567 fsf_req->qtcb->prefix.req_seq_no = 4568 fsf_req->adapter->fsf_req_seq_no; 4569 fsf_req->qtcb->prefix.req_id = fsf_req->req_id; 4570 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; 4571 fsf_req->qtcb->prefix.qtcb_type = 4572 fsf_qtcb_type[fsf_req->fsf_command]; 4573 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; 4574 fsf_req->qtcb->header.req_handle = fsf_req->req_id; 4575 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; 4576 } 4577 } 4578 4579 /** 4580 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue 4581 * @adapter: adapter for which request queue is examined 4582 * @req_flags: flags indicating whether to wait for needed SBAL or not 4583 * @lock_flags: lock_flags if queue_lock is taken 4584 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS 4585 * Locks: lock adapter->request_queue->queue_lock on success 4586 */ 4587 static int 4588 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, 4589 unsigned long *lock_flags) 4590 { 4591 long ret; 4592 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4593 4594 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { 4595 ret = wait_event_interruptible_timeout(adapter->request_wq, 4596 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), 4597 ZFCP_SBAL_TIMEOUT); 4598 if (ret < 0) 4599 return ret; 4600 if (!ret) 4601 return -EIO; 4602 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) 4603 return -EIO; 4604 4605 return 0; 4606 } 4607 4608 /* 4609 * function: zfcp_fsf_req_create 4610 * 4611 * purpose: create an FSF request at the specified adapter and 4612 * setup common fields 4613 * 4614 * returns: -ENOMEM if there was insufficient memory for a request 4615 * -EIO if no qdio buffers could be allocate to the request 4616 * -EINVAL/-EPERM on bug conditions in req_dequeue 4617 * 0 in success 4618 * 4619 * note: The created request is returned by reference. 4620 * 4621 * locks: lock of concerned request queue must not be held, 4622 * but is held on completion (write, irqsave) 4623 */ 4624 int 4625 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, 4626 mempool_t *pool, unsigned long *lock_flags, 4627 struct zfcp_fsf_req **fsf_req_p) 4628 { 4629 volatile struct qdio_buffer_element *sbale; 4630 struct zfcp_fsf_req *fsf_req = NULL; 4631 int ret = 0; 4632 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4633 4634 /* allocate new FSF request */ 4635 fsf_req = zfcp_fsf_req_alloc(pool, req_flags); 4636 if (unlikely(NULL == fsf_req)) { 4637 ZFCP_LOG_DEBUG("error: Could not put an FSF request into" 4638 "the outbound (send) queue.\n"); 4639 ret = -ENOMEM; 4640 goto failed_fsf_req; 4641 } 4642 4643 fsf_req->adapter = adapter; 4644 fsf_req->fsf_command = fsf_cmd; 4645 INIT_LIST_HEAD(&fsf_req->list); 4646 4647 /* this is serialized (we are holding req_queue-lock of adapter */ 4648 if (adapter->req_no == 0) 4649 adapter->req_no++; 4650 fsf_req->req_id = adapter->req_no++; 4651 4652 init_timer(&fsf_req->timer); 4653 zfcp_fsf_req_qtcb_init(fsf_req); 4654 4655 /* initialize waitqueue which may be used to wait on 4656 this request completion */ 4657 init_waitqueue_head(&fsf_req->completion_wq); 4658 4659 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); 4660 if(ret < 0) { 4661 goto failed_sbals; 4662 } 4663 4664 /* 4665 * We hold queue_lock here. Check if QDIOUP is set and let request fail 4666 * if it is not set (see also *_open_qdio and *_close_qdio). 4667 */ 4668 4669 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { 4670 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); 4671 ret = -EIO; 4672 goto failed_sbals; 4673 } 4674 4675 if (fsf_req->qtcb) { 4676 fsf_req->seq_no = adapter->fsf_req_seq_no; 4677 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 4678 } 4679 fsf_req->sbal_number = 1; 4680 fsf_req->sbal_first = req_queue->free_index; 4681 fsf_req->sbal_curr = req_queue->free_index; 4682 fsf_req->sbale_curr = 1; 4683 4684 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { 4685 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 4686 } 4687 4688 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4689 4690 /* setup common SBALE fields */ 4691 sbale[0].addr = (void *) fsf_req->req_id; 4692 sbale[0].flags |= SBAL_FLAGS0_COMMAND; 4693 if (likely(fsf_req->qtcb != NULL)) { 4694 sbale[1].addr = (void *) fsf_req->qtcb; 4695 sbale[1].length = sizeof(struct fsf_qtcb); 4696 } 4697 4698 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", 4699 fsf_req->sbal_number, fsf_req->sbal_first); 4700 4701 goto success; 4702 4703 failed_sbals: 4704 /* dequeue new FSF request previously enqueued */ 4705 zfcp_fsf_req_free(fsf_req); 4706 fsf_req = NULL; 4707 4708 failed_fsf_req: 4709 write_lock_irqsave(&req_queue->queue_lock, *lock_flags); 4710 success: 4711 *fsf_req_p = fsf_req; 4712 return ret; 4713 } 4714 4715 /* 4716 * function: zfcp_fsf_req_send 4717 * 4718 * purpose: start transfer of FSF request via QDIO 4719 * 4720 * returns: 0 - request transfer succesfully started 4721 * !0 - start of request transfer failed 4722 */ 4723 static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) 4724 { 4725 struct zfcp_adapter *adapter; 4726 struct zfcp_qdio_queue *req_queue; 4727 volatile struct qdio_buffer_element *sbale; 4728 int inc_seq_no; 4729 int new_distance_from_int; 4730 u64 dbg_tmp[2]; 4731 int retval = 0; 4732 4733 adapter = fsf_req->adapter; 4734 req_queue = &adapter->request_queue, 4735 4736 4737 /* FIXME(debug): remove it later */ 4738 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); 4739 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); 4740 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); 4741 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, 4742 sbale[1].length); 4743 4744 /* put allocated FSF request into hash table */ 4745 spin_lock(&adapter->req_list_lock); 4746 zfcp_reqlist_add(adapter, fsf_req); 4747 spin_unlock(&adapter->req_list_lock); 4748 4749 inc_seq_no = (fsf_req->qtcb != NULL); 4750 4751 ZFCP_LOG_TRACE("request queue of adapter %s: " 4752 "next free SBAL is %i, %i free SBALs\n", 4753 zfcp_get_busid_by_adapter(adapter), 4754 req_queue->free_index, 4755 atomic_read(&req_queue->free_count)); 4756 4757 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " 4758 "index_in_queue=%i, count=%i, buffers=%p\n", 4759 zfcp_get_busid_by_adapter(adapter), 4760 QDIO_FLAG_SYNC_OUTPUT, 4761 0, fsf_req->sbal_first, fsf_req->sbal_number, 4762 &req_queue->buffer[fsf_req->sbal_first]); 4763 4764 /* 4765 * adjust the number of free SBALs in request queue as well as 4766 * position of first one 4767 */ 4768 atomic_sub(fsf_req->sbal_number, &req_queue->free_count); 4769 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); 4770 req_queue->free_index += fsf_req->sbal_number; /* increase */ 4771 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ 4772 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); 4773 4774 fsf_req->issued = get_clock(); 4775 4776 retval = do_QDIO(adapter->ccw_device, 4777 QDIO_FLAG_SYNC_OUTPUT, 4778 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); 4779 4780 dbg_tmp[0] = (unsigned long) sbale[0].addr; 4781 dbg_tmp[1] = (u64) retval; 4782 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16); 4783 4784 if (unlikely(retval)) { 4785 /* Queues are down..... */ 4786 retval = -EIO; 4787 del_timer(&fsf_req->timer); 4788 spin_lock(&adapter->req_list_lock); 4789 zfcp_reqlist_remove(adapter, fsf_req->req_id); 4790 spin_unlock(&adapter->req_list_lock); 4791 /* undo changes in request queue made for this request */ 4792 zfcp_qdio_zero_sbals(req_queue->buffer, 4793 fsf_req->sbal_first, fsf_req->sbal_number); 4794 atomic_add(fsf_req->sbal_number, &req_queue->free_count); 4795 req_queue->free_index -= fsf_req->sbal_number; 4796 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; 4797 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ 4798 zfcp_erp_adapter_reopen(adapter, 0); 4799 } else { 4800 req_queue->distance_from_int = new_distance_from_int; 4801 /* 4802 * increase FSF sequence counter - 4803 * this must only be done for request successfully enqueued to 4804 * QDIO this rejected requests may be cleaned up by calling 4805 * routines resulting in missing sequence counter values 4806 * otherwise, 4807 */ 4808 4809 /* Don't increase for unsolicited status */ 4810 if (inc_seq_no) 4811 adapter->fsf_req_seq_no++; 4812 4813 /* count FSF requests pending */ 4814 atomic_inc(&adapter->reqs_active); 4815 } 4816 return retval; 4817 } 4818 4819 #undef ZFCP_LOG_AREA 4820