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 *, struct timer_list *); 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 static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *); 53 54 /* association between FSF command and FSF QTCB type */ 55 static u32 fsf_qtcb_type[] = { 56 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 57 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 58 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 59 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 60 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 61 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 62 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 63 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 64 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 65 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 66 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 67 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 68 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 69 }; 70 71 static const char zfcp_act_subtable_type[5][8] = { 72 "unknown", "OS", "WWPN", "DID", "LUN" 73 }; 74 75 /****************************************************************/ 76 /*************** FSF related Functions *************************/ 77 /****************************************************************/ 78 79 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF 80 81 /* 82 * function: zfcp_fsf_req_alloc 83 * 84 * purpose: Obtains an fsf_req and potentially a qtcb (for all but 85 * unsolicited requests) via helper functions 86 * Does some initial fsf request set-up. 87 * 88 * returns: pointer to allocated fsf_req if successfull 89 * NULL otherwise 90 * 91 * locks: none 92 * 93 */ 94 static struct zfcp_fsf_req * 95 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) 96 { 97 size_t size; 98 void *ptr; 99 struct zfcp_fsf_req *fsf_req = NULL; 100 101 if (req_flags & ZFCP_REQ_NO_QTCB) 102 size = sizeof(struct zfcp_fsf_req); 103 else 104 size = sizeof(struct zfcp_fsf_req_pool_element); 105 106 if (likely(pool != NULL)) 107 ptr = mempool_alloc(pool, GFP_ATOMIC); 108 else 109 ptr = kmalloc(size, GFP_ATOMIC); 110 111 if (unlikely(NULL == ptr)) 112 goto out; 113 114 memset(ptr, 0, size); 115 116 if (req_flags & ZFCP_REQ_NO_QTCB) { 117 fsf_req = (struct zfcp_fsf_req *) ptr; 118 } else { 119 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req; 120 fsf_req->qtcb = 121 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb; 122 } 123 124 fsf_req->pool = pool; 125 126 out: 127 return fsf_req; 128 } 129 130 /* 131 * function: zfcp_fsf_req_free 132 * 133 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or 134 * returns it into the pool via helper functions. 135 * 136 * returns: sod all 137 * 138 * locks: none 139 */ 140 void 141 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) 142 { 143 if (likely(fsf_req->pool != NULL)) 144 mempool_free(fsf_req, fsf_req->pool); 145 else 146 kfree(fsf_req); 147 } 148 149 /* 150 * function: 151 * 152 * purpose: 153 * 154 * returns: 155 * 156 * note: qdio queues shall be down (no ongoing inbound processing) 157 */ 158 int 159 zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 160 { 161 struct zfcp_fsf_req *fsf_req, *tmp; 162 unsigned long flags; 163 LIST_HEAD(remove_queue); 164 165 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); 166 list_splice_init(&adapter->fsf_req_list_head, &remove_queue); 167 atomic_set(&adapter->fsf_reqs_active, 0); 168 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 169 170 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { 171 list_del(&fsf_req->list); 172 zfcp_fsf_req_dismiss(fsf_req); 173 } 174 175 return 0; 176 } 177 178 /* 179 * function: 180 * 181 * purpose: 182 * 183 * returns: 184 */ 185 static void 186 zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req) 187 { 188 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 189 zfcp_fsf_req_complete(fsf_req); 190 } 191 192 /* 193 * function: zfcp_fsf_req_complete 194 * 195 * purpose: Updates active counts and timers for openfcp-reqs 196 * May cleanup request after req_eval returns 197 * 198 * returns: 0 - success 199 * !0 - failure 200 * 201 * context: 202 */ 203 int 204 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) 205 { 206 int retval = 0; 207 int cleanup; 208 209 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { 210 ZFCP_LOG_DEBUG("Status read response received\n"); 211 /* 212 * Note: all cleanup handling is done in the callchain of 213 * the function call-chain below. 214 */ 215 zfcp_fsf_status_read_handler(fsf_req); 216 goto out; 217 } else 218 zfcp_fsf_protstatus_eval(fsf_req); 219 220 /* 221 * fsf_req may be deleted due to waking up functions, so 222 * cleanup is saved here and used later 223 */ 224 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 225 cleanup = 1; 226 else 227 cleanup = 0; 228 229 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; 230 231 /* cleanup request if requested by initiator */ 232 if (likely(cleanup)) { 233 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); 234 /* 235 * lock must not be held here since it will be 236 * grabed by the called routine, too 237 */ 238 zfcp_fsf_req_free(fsf_req); 239 } else { 240 /* notify initiator waiting for the requests completion */ 241 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); 242 /* 243 * FIXME: Race! We must not access fsf_req here as it might have been 244 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED 245 * flag. It's an improbable case. But, we have the same paranoia for 246 * the cleanup flag already. 247 * Might better be handled using complete()? 248 * (setting the flag and doing wakeup ought to be atomic 249 * with regard to checking the flag as long as waitqueue is 250 * part of the to be released structure) 251 */ 252 wake_up(&fsf_req->completion_wq); 253 } 254 255 out: 256 return retval; 257 } 258 259 /* 260 * function: zfcp_fsf_protstatus_eval 261 * 262 * purpose: evaluates the QTCB of the finished FSF request 263 * and initiates appropriate actions 264 * (usually calling FSF command specific handlers) 265 * 266 * returns: 267 * 268 * context: 269 * 270 * locks: 271 */ 272 static int 273 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) 274 { 275 int retval = 0; 276 struct zfcp_adapter *adapter = fsf_req->adapter; 277 struct fsf_qtcb *qtcb = fsf_req->qtcb; 278 union fsf_prot_status_qual *prot_status_qual = 279 &qtcb->prefix.prot_status_qual; 280 281 zfcp_hba_dbf_event_fsf_response(fsf_req); 282 283 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 284 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", 285 (unsigned long) fsf_req); 286 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 287 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ 288 goto skip_protstatus; 289 } 290 291 /* log additional information provided by FSF (if any) */ 292 if (unlikely(qtcb->header.log_length)) { 293 /* do not trust them ;-) */ 294 if (qtcb->header.log_start > sizeof(struct fsf_qtcb)) { 295 ZFCP_LOG_NORMAL 296 ("bug: ULP (FSF logging) log data starts " 297 "beyond end of packet header. Ignored. " 298 "(start=%i, size=%li)\n", 299 qtcb->header.log_start, 300 sizeof(struct fsf_qtcb)); 301 goto forget_log; 302 } 303 if ((size_t) (qtcb->header.log_start + qtcb->header.log_length) 304 > sizeof(struct fsf_qtcb)) { 305 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends " 306 "beyond end of packet header. Ignored. " 307 "(start=%i, length=%i, size=%li)\n", 308 qtcb->header.log_start, 309 qtcb->header.log_length, 310 sizeof(struct fsf_qtcb)); 311 goto forget_log; 312 } 313 ZFCP_LOG_TRACE("ULP log data: \n"); 314 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 315 (char *) qtcb + qtcb->header.log_start, 316 qtcb->header.log_length); 317 } 318 forget_log: 319 320 /* evaluate FSF Protocol Status */ 321 switch (qtcb->prefix.prot_status) { 322 323 case FSF_PROT_GOOD: 324 case FSF_PROT_FSF_STATUS_PRESENTED: 325 break; 326 327 case FSF_PROT_QTCB_VERSION_ERROR: 328 ZFCP_LOG_NORMAL("error: The adapter %s contains " 329 "microcode of version 0x%x, the device driver " 330 "only supports 0x%x. Aborting.\n", 331 zfcp_get_busid_by_adapter(adapter), 332 prot_status_qual->version_error.fsf_version, 333 ZFCP_QTCB_VERSION); 334 zfcp_erp_adapter_shutdown(adapter, 0); 335 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 336 break; 337 338 case FSF_PROT_SEQ_NUMB_ERROR: 339 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " 340 "driver (0x%x) and adapter %s (0x%x). " 341 "Restarting all operations on this adapter.\n", 342 qtcb->prefix.req_seq_no, 343 zfcp_get_busid_by_adapter(adapter), 344 prot_status_qual->sequence_error.exp_req_seq_no); 345 zfcp_erp_adapter_reopen(adapter, 0); 346 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 347 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 348 break; 349 350 case FSF_PROT_UNSUPP_QTCB_TYPE: 351 ZFCP_LOG_NORMAL("error: Packet header type used by the " 352 "device driver is incompatible with " 353 "that used on adapter %s. " 354 "Stopping all operations on this adapter.\n", 355 zfcp_get_busid_by_adapter(adapter)); 356 zfcp_erp_adapter_shutdown(adapter, 0); 357 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 358 break; 359 360 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 361 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 362 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 363 &(adapter->status)); 364 break; 365 366 case FSF_PROT_DUPLICATE_REQUEST_ID: 367 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " 368 "to the adapter %s is ambiguous. " 369 "Stopping all operations on this adapter.\n", 370 *(unsigned long long*) 371 (&qtcb->bottom.support.req_handle), 372 zfcp_get_busid_by_adapter(adapter)); 373 zfcp_erp_adapter_shutdown(adapter, 0); 374 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 375 break; 376 377 case FSF_PROT_LINK_DOWN: 378 zfcp_fsf_link_down_info_eval(adapter, 379 &prot_status_qual->link_down_info); 380 zfcp_erp_adapter_reopen(adapter, 0); 381 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 382 break; 383 384 case FSF_PROT_REEST_QUEUE: 385 ZFCP_LOG_NORMAL("The local link to adapter with " 386 "%s was re-plugged. " 387 "Re-starting operations on this adapter.\n", 388 zfcp_get_busid_by_adapter(adapter)); 389 /* All ports should be marked as ready to run again */ 390 zfcp_erp_modify_adapter_status(adapter, 391 ZFCP_STATUS_COMMON_RUNNING, 392 ZFCP_SET); 393 zfcp_erp_adapter_reopen(adapter, 394 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 395 | ZFCP_STATUS_COMMON_ERP_FAILED); 396 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 397 break; 398 399 case FSF_PROT_ERROR_STATE: 400 ZFCP_LOG_NORMAL("error: The adapter %s " 401 "has entered the error state. " 402 "Restarting all operations on this " 403 "adapter.\n", 404 zfcp_get_busid_by_adapter(adapter)); 405 zfcp_erp_adapter_reopen(adapter, 0); 406 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 407 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 408 break; 409 410 default: 411 ZFCP_LOG_NORMAL("bug: Transfer protocol status information " 412 "provided by the adapter %s " 413 "is not compatible with the device driver. " 414 "Stopping all operations on this adapter. " 415 "(debug info 0x%x).\n", 416 zfcp_get_busid_by_adapter(adapter), 417 qtcb->prefix.prot_status); 418 zfcp_erp_adapter_shutdown(adapter, 0); 419 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 420 } 421 422 skip_protstatus: 423 /* 424 * always call specific handlers to give them a chance to do 425 * something meaningful even in error cases 426 */ 427 zfcp_fsf_fsfstatus_eval(fsf_req); 428 return retval; 429 } 430 431 /* 432 * function: zfcp_fsf_fsfstatus_eval 433 * 434 * purpose: evaluates FSF status of completed FSF request 435 * and acts accordingly 436 * 437 * returns: 438 */ 439 static int 440 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) 441 { 442 int retval = 0; 443 444 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 445 goto skip_fsfstatus; 446 } 447 448 /* evaluate FSF Status */ 449 switch (fsf_req->qtcb->header.fsf_status) { 450 case FSF_UNKNOWN_COMMAND: 451 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 452 "not known by the adapter %s " 453 "Stopping all operations on this adapter. " 454 "(debug info 0x%x).\n", 455 zfcp_get_busid_by_adapter(fsf_req->adapter), 456 fsf_req->qtcb->header.fsf_command); 457 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 458 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 459 break; 460 461 case FSF_FCP_RSP_AVAILABLE: 462 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " 463 "SCSI stack.\n"); 464 break; 465 466 case FSF_ADAPTER_STATUS_AVAILABLE: 467 zfcp_fsf_fsfstatus_qual_eval(fsf_req); 468 break; 469 } 470 471 skip_fsfstatus: 472 /* 473 * always call specific handlers to give them a chance to do 474 * something meaningful even in error cases 475 */ 476 zfcp_fsf_req_dispatch(fsf_req); 477 478 return retval; 479 } 480 481 /* 482 * function: zfcp_fsf_fsfstatus_qual_eval 483 * 484 * purpose: evaluates FSF status-qualifier of completed FSF request 485 * and acts accordingly 486 * 487 * returns: 488 */ 489 static int 490 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) 491 { 492 int retval = 0; 493 494 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 495 case FSF_SQ_FCP_RSP_AVAILABLE: 496 break; 497 case FSF_SQ_RETRY_IF_POSSIBLE: 498 /* The SCSI-stack may now issue retries or escalate */ 499 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 500 break; 501 case FSF_SQ_COMMAND_ABORTED: 502 /* Carry the aborted state on to upper layer */ 503 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; 504 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 505 break; 506 case FSF_SQ_NO_RECOM: 507 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a" 508 "problem on the adapter %s " 509 "Stopping all operations on this adapter. ", 510 zfcp_get_busid_by_adapter(fsf_req->adapter)); 511 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 512 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 513 break; 514 case FSF_SQ_ULP_PROGRAMMING_ERROR: 515 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " 516 "(adapter %s)\n", 517 zfcp_get_busid_by_adapter(fsf_req->adapter)); 518 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 519 break; 520 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 521 case FSF_SQ_NO_RETRY_POSSIBLE: 522 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 523 /* dealt with in the respective functions */ 524 break; 525 default: 526 ZFCP_LOG_NORMAL("bug: Additional status info could " 527 "not be interpreted properly.\n"); 528 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 529 (char *) &fsf_req->qtcb->header.fsf_status_qual, 530 sizeof (union fsf_status_qual)); 531 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 532 break; 533 } 534 535 return retval; 536 } 537 538 /** 539 * zfcp_fsf_link_down_info_eval - evaluate link down information block 540 */ 541 static void 542 zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter, 543 struct fsf_link_down_info *link_down) 544 { 545 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 546 &adapter->status)) 547 return; 548 549 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); 550 551 if (link_down == NULL) 552 goto out; 553 554 switch (link_down->error_code) { 555 case FSF_PSQ_LINK_NO_LIGHT: 556 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 557 "(no light detected)\n", 558 zfcp_get_busid_by_adapter(adapter)); 559 break; 560 case FSF_PSQ_LINK_WRAP_PLUG: 561 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 562 "(wrap plug detected)\n", 563 zfcp_get_busid_by_adapter(adapter)); 564 break; 565 case FSF_PSQ_LINK_NO_FCP: 566 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 567 "(adjacent node on link does not support FCP)\n", 568 zfcp_get_busid_by_adapter(adapter)); 569 break; 570 case FSF_PSQ_LINK_FIRMWARE_UPDATE: 571 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 572 "(firmware update in progress)\n", 573 zfcp_get_busid_by_adapter(adapter)); 574 break; 575 case FSF_PSQ_LINK_INVALID_WWPN: 576 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 577 "(duplicate or invalid WWPN detected)\n", 578 zfcp_get_busid_by_adapter(adapter)); 579 break; 580 case FSF_PSQ_LINK_NO_NPIV_SUPPORT: 581 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 582 "(no support for NPIV by Fabric)\n", 583 zfcp_get_busid_by_adapter(adapter)); 584 break; 585 case FSF_PSQ_LINK_NO_FCP_RESOURCES: 586 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 587 "(out of resource in FCP daughtercard)\n", 588 zfcp_get_busid_by_adapter(adapter)); 589 break; 590 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: 591 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 592 "(out of resource in Fabric)\n", 593 zfcp_get_busid_by_adapter(adapter)); 594 break; 595 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: 596 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 597 "(unable to Fabric login)\n", 598 zfcp_get_busid_by_adapter(adapter)); 599 break; 600 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: 601 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n", 602 zfcp_get_busid_by_adapter(adapter)); 603 break; 604 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: 605 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n", 606 zfcp_get_busid_by_adapter(adapter)); 607 break; 608 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: 609 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n", 610 zfcp_get_busid_by_adapter(adapter)); 611 break; 612 default: 613 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 614 "(warning: unknown reason code %d)\n", 615 zfcp_get_busid_by_adapter(adapter), 616 link_down->error_code); 617 } 618 619 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) 620 ZFCP_LOG_DEBUG("Debug information to link down: " 621 "primary_status=0x%02x " 622 "ioerr_code=0x%02x " 623 "action_code=0x%02x " 624 "reason_code=0x%02x " 625 "explanation_code=0x%02x " 626 "vendor_specific_code=0x%02x\n", 627 link_down->primary_status, 628 link_down->ioerr_code, 629 link_down->action_code, 630 link_down->reason_code, 631 link_down->explanation_code, 632 link_down->vendor_specific_code); 633 634 out: 635 zfcp_erp_adapter_failed(adapter); 636 } 637 638 /* 639 * function: zfcp_fsf_req_dispatch 640 * 641 * purpose: calls the appropriate command specific handler 642 * 643 * returns: 644 */ 645 static int 646 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) 647 { 648 struct zfcp_erp_action *erp_action = fsf_req->erp_action; 649 struct zfcp_adapter *adapter = fsf_req->adapter; 650 int retval = 0; 651 652 653 switch (fsf_req->fsf_command) { 654 655 case FSF_QTCB_FCP_CMND: 656 zfcp_fsf_send_fcp_command_handler(fsf_req); 657 break; 658 659 case FSF_QTCB_ABORT_FCP_CMND: 660 zfcp_fsf_abort_fcp_command_handler(fsf_req); 661 break; 662 663 case FSF_QTCB_SEND_GENERIC: 664 zfcp_fsf_send_ct_handler(fsf_req); 665 break; 666 667 case FSF_QTCB_OPEN_PORT_WITH_DID: 668 zfcp_fsf_open_port_handler(fsf_req); 669 break; 670 671 case FSF_QTCB_OPEN_LUN: 672 zfcp_fsf_open_unit_handler(fsf_req); 673 break; 674 675 case FSF_QTCB_CLOSE_LUN: 676 zfcp_fsf_close_unit_handler(fsf_req); 677 break; 678 679 case FSF_QTCB_CLOSE_PORT: 680 zfcp_fsf_close_port_handler(fsf_req); 681 break; 682 683 case FSF_QTCB_CLOSE_PHYSICAL_PORT: 684 zfcp_fsf_close_physical_port_handler(fsf_req); 685 break; 686 687 case FSF_QTCB_EXCHANGE_CONFIG_DATA: 688 zfcp_fsf_exchange_config_data_handler(fsf_req); 689 break; 690 691 case FSF_QTCB_EXCHANGE_PORT_DATA: 692 zfcp_fsf_exchange_port_data_handler(fsf_req); 693 break; 694 695 case FSF_QTCB_SEND_ELS: 696 zfcp_fsf_send_els_handler(fsf_req); 697 break; 698 699 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 700 zfcp_fsf_control_file_handler(fsf_req); 701 break; 702 703 case FSF_QTCB_UPLOAD_CONTROL_FILE: 704 zfcp_fsf_control_file_handler(fsf_req); 705 break; 706 707 default: 708 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 709 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 710 "not supported by the adapter %s\n", 711 zfcp_get_busid_by_adapter(adapter)); 712 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) 713 ZFCP_LOG_NORMAL 714 ("bug: Command issued by the device driver differs " 715 "from the command returned by the adapter %s " 716 "(debug info 0x%x, 0x%x).\n", 717 zfcp_get_busid_by_adapter(adapter), 718 fsf_req->fsf_command, 719 fsf_req->qtcb->header.fsf_command); 720 } 721 722 if (!erp_action) 723 return retval; 724 725 zfcp_erp_async_handler(erp_action, 0); 726 727 return retval; 728 } 729 730 /* 731 * function: zfcp_fsf_status_read 732 * 733 * purpose: initiates a Status Read command at the specified adapter 734 * 735 * returns: 736 */ 737 int 738 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) 739 { 740 struct zfcp_fsf_req *fsf_req; 741 struct fsf_status_read_buffer *status_buffer; 742 unsigned long lock_flags; 743 volatile struct qdio_buffer_element *sbale; 744 int retval = 0; 745 746 /* setup new FSF request */ 747 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 748 req_flags | ZFCP_REQ_NO_QTCB, 749 adapter->pool.fsf_req_status_read, 750 &lock_flags, &fsf_req); 751 if (retval < 0) { 752 ZFCP_LOG_INFO("error: Could not create unsolicited status " 753 "buffer for adapter %s.\n", 754 zfcp_get_busid_by_adapter(adapter)); 755 goto failed_req_create; 756 } 757 758 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 759 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; 760 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; 761 fsf_req->sbale_curr = 2; 762 763 status_buffer = 764 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); 765 if (!status_buffer) { 766 ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); 767 goto failed_buf; 768 } 769 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); 770 fsf_req->data = (unsigned long) status_buffer; 771 772 /* insert pointer to respective buffer */ 773 sbale = zfcp_qdio_sbale_curr(fsf_req); 774 sbale->addr = (void *) status_buffer; 775 sbale->length = sizeof(struct fsf_status_read_buffer); 776 777 /* start QDIO request for this FSF request */ 778 retval = zfcp_fsf_req_send(fsf_req, NULL); 779 if (retval) { 780 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " 781 "environment.\n"); 782 goto failed_req_send; 783 } 784 785 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", 786 zfcp_get_busid_by_adapter(adapter)); 787 goto out; 788 789 failed_req_send: 790 mempool_free(status_buffer, adapter->pool.data_status_read); 791 792 failed_buf: 793 zfcp_fsf_req_free(fsf_req); 794 failed_req_create: 795 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); 796 out: 797 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 798 return retval; 799 } 800 801 static int 802 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) 803 { 804 struct fsf_status_read_buffer *status_buffer; 805 struct zfcp_adapter *adapter; 806 struct zfcp_port *port; 807 unsigned long flags; 808 809 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; 810 adapter = fsf_req->adapter; 811 812 read_lock_irqsave(&zfcp_data.config_lock, flags); 813 list_for_each_entry(port, &adapter->port_list_head, list) 814 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) 815 break; 816 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 817 818 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { 819 ZFCP_LOG_NORMAL("bug: Reopen port indication received for" 820 "nonexisting port with d_id 0x%08x on " 821 "adapter %s. Ignored.\n", 822 status_buffer->d_id & ZFCP_DID_MASK, 823 zfcp_get_busid_by_adapter(adapter)); 824 goto out; 825 } 826 827 switch (status_buffer->status_subtype) { 828 829 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: 830 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:"); 831 zfcp_erp_port_reopen(port, 0); 832 break; 833 834 case FSF_STATUS_READ_SUB_ERROR_PORT: 835 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:"); 836 zfcp_erp_port_shutdown(port, 0); 837 break; 838 839 default: 840 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:"); 841 debug_exception(adapter->erp_dbf, 0, 842 &status_buffer->status_subtype, sizeof (u32)); 843 ZFCP_LOG_NORMAL("bug: Undefined status subtype received " 844 "for a reopen indication on port with " 845 "d_id 0x%08x on the adapter %s. " 846 "Ignored. (debug info 0x%x)\n", 847 status_buffer->d_id, 848 zfcp_get_busid_by_adapter(adapter), 849 status_buffer->status_subtype); 850 } 851 out: 852 return 0; 853 } 854 855 /* 856 * function: zfcp_fsf_status_read_handler 857 * 858 * purpose: is called for finished Open Port command 859 * 860 * returns: 861 */ 862 static int 863 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) 864 { 865 int retval = 0; 866 struct zfcp_adapter *adapter = fsf_req->adapter; 867 struct fsf_status_read_buffer *status_buffer = 868 (struct fsf_status_read_buffer *) fsf_req->data; 869 struct fsf_bit_error_payload *fsf_bit_error; 870 871 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 872 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); 873 mempool_free(status_buffer, adapter->pool.data_status_read); 874 zfcp_fsf_req_free(fsf_req); 875 goto out; 876 } 877 878 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); 879 880 switch (status_buffer->status_type) { 881 882 case FSF_STATUS_READ_PORT_CLOSED: 883 zfcp_fsf_status_read_port_closed(fsf_req); 884 break; 885 886 case FSF_STATUS_READ_INCOMING_ELS: 887 zfcp_fsf_incoming_els(fsf_req); 888 break; 889 890 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 891 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", 892 zfcp_get_busid_by_adapter(adapter)); 893 break; 894 895 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 896 fsf_bit_error = (struct fsf_bit_error_payload *) 897 status_buffer->payload; 898 ZFCP_LOG_NORMAL("Warning: bit error threshold data " 899 "received (adapter %s, " 900 "link failures = %i, loss of sync errors = %i, " 901 "loss of signal errors = %i, " 902 "primitive sequence errors = %i, " 903 "invalid transmission word errors = %i, " 904 "CRC errors = %i)\n", 905 zfcp_get_busid_by_adapter(adapter), 906 fsf_bit_error->link_failure_error_count, 907 fsf_bit_error->loss_of_sync_error_count, 908 fsf_bit_error->loss_of_signal_error_count, 909 fsf_bit_error->primitive_sequence_error_count, 910 fsf_bit_error->invalid_transmission_word_error_count, 911 fsf_bit_error->crc_error_count); 912 ZFCP_LOG_INFO("Additional bit error threshold data " 913 "(adapter %s, " 914 "primitive sequence event time-outs = %i, " 915 "elastic buffer overrun errors = %i, " 916 "advertised receive buffer-to-buffer credit = %i, " 917 "current receice buffer-to-buffer credit = %i, " 918 "advertised transmit buffer-to-buffer credit = %i, " 919 "current transmit buffer-to-buffer credit = %i)\n", 920 zfcp_get_busid_by_adapter(adapter), 921 fsf_bit_error->primitive_sequence_event_timeout_count, 922 fsf_bit_error->elastic_buffer_overrun_error_count, 923 fsf_bit_error->advertised_receive_b2b_credit, 924 fsf_bit_error->current_receive_b2b_credit, 925 fsf_bit_error->advertised_transmit_b2b_credit, 926 fsf_bit_error->current_transmit_b2b_credit); 927 break; 928 929 case FSF_STATUS_READ_LINK_DOWN: 930 switch (status_buffer->status_subtype) { 931 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: 932 ZFCP_LOG_INFO("Physical link to adapter %s is down\n", 933 zfcp_get_busid_by_adapter(adapter)); 934 zfcp_fsf_link_down_info_eval(adapter, 935 (struct fsf_link_down_info *) 936 &status_buffer->payload); 937 break; 938 case FSF_STATUS_READ_SUB_FDISC_FAILED: 939 ZFCP_LOG_INFO("Local link to adapter %s is down " 940 "due to failed FDISC login\n", 941 zfcp_get_busid_by_adapter(adapter)); 942 zfcp_fsf_link_down_info_eval(adapter, 943 (struct fsf_link_down_info *) 944 &status_buffer->payload); 945 break; 946 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: 947 ZFCP_LOG_INFO("Local link to adapter %s is down " 948 "due to firmware update on adapter\n", 949 zfcp_get_busid_by_adapter(adapter)); 950 zfcp_fsf_link_down_info_eval(adapter, NULL); 951 break; 952 default: 953 ZFCP_LOG_INFO("Local link to adapter %s is down " 954 "due to unknown reason\n", 955 zfcp_get_busid_by_adapter(adapter)); 956 zfcp_fsf_link_down_info_eval(adapter, NULL); 957 }; 958 break; 959 960 case FSF_STATUS_READ_LINK_UP: 961 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. " 962 "Restarting operations on this adapter\n", 963 zfcp_get_busid_by_adapter(adapter)); 964 /* All ports should be marked as ready to run again */ 965 zfcp_erp_modify_adapter_status(adapter, 966 ZFCP_STATUS_COMMON_RUNNING, 967 ZFCP_SET); 968 zfcp_erp_adapter_reopen(adapter, 969 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 970 | ZFCP_STATUS_COMMON_ERP_FAILED); 971 break; 972 973 case FSF_STATUS_READ_NOTIFICATION_LOST: 974 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: " 975 "adapter %s%s%s%s%s%s%s%s%s\n", 976 zfcp_get_busid_by_adapter(adapter), 977 (status_buffer->status_subtype & 978 FSF_STATUS_READ_SUB_INCOMING_ELS) ? 979 ", incoming ELS" : "", 980 (status_buffer->status_subtype & 981 FSF_STATUS_READ_SUB_SENSE_DATA) ? 982 ", sense data" : "", 983 (status_buffer->status_subtype & 984 FSF_STATUS_READ_SUB_LINK_STATUS) ? 985 ", link status change" : "", 986 (status_buffer->status_subtype & 987 FSF_STATUS_READ_SUB_PORT_CLOSED) ? 988 ", port close" : "", 989 (status_buffer->status_subtype & 990 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ? 991 ", bit error exception" : "", 992 (status_buffer->status_subtype & 993 FSF_STATUS_READ_SUB_ACT_UPDATED) ? 994 ", ACT update" : "", 995 (status_buffer->status_subtype & 996 FSF_STATUS_READ_SUB_ACT_HARDENED) ? 997 ", ACT hardening" : "", 998 (status_buffer->status_subtype & 999 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ? 1000 ", adapter feature change" : ""); 1001 1002 if (status_buffer->status_subtype & 1003 FSF_STATUS_READ_SUB_ACT_UPDATED) 1004 zfcp_erp_adapter_access_changed(adapter); 1005 break; 1006 1007 case FSF_STATUS_READ_CFDC_UPDATED: 1008 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n", 1009 zfcp_get_busid_by_adapter(adapter)); 1010 zfcp_erp_adapter_access_changed(adapter); 1011 break; 1012 1013 case FSF_STATUS_READ_CFDC_HARDENED: 1014 switch (status_buffer->status_subtype) { 1015 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: 1016 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n", 1017 zfcp_get_busid_by_adapter(adapter)); 1018 break; 1019 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: 1020 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied " 1021 "to the secondary SE\n", 1022 zfcp_get_busid_by_adapter(adapter)); 1023 break; 1024 default: 1025 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n", 1026 zfcp_get_busid_by_adapter(adapter)); 1027 } 1028 break; 1029 1030 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: 1031 debug_text_event(adapter->erp_dbf, 2, "unsol_features:"); 1032 ZFCP_LOG_INFO("List of supported features on adapter %s has " 1033 "been changed from 0x%08X to 0x%08X\n", 1034 zfcp_get_busid_by_adapter(adapter), 1035 *(u32*) (status_buffer->payload + 4), 1036 *(u32*) (status_buffer->payload)); 1037 adapter->adapter_features = *(u32*) status_buffer->payload; 1038 break; 1039 1040 default: 1041 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown " 1042 "type was received (debug info 0x%x)\n", 1043 status_buffer->status_type); 1044 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", 1045 status_buffer); 1046 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1047 (char *) status_buffer, 1048 sizeof (struct fsf_status_read_buffer)); 1049 break; 1050 } 1051 mempool_free(status_buffer, adapter->pool.data_status_read); 1052 zfcp_fsf_req_free(fsf_req); 1053 /* 1054 * recycle buffer and start new request repeat until outbound 1055 * queue is empty or adapter shutdown is requested 1056 */ 1057 /* 1058 * FIXME(qdio): 1059 * we may wait in the req_create for 5s during shutdown, so 1060 * qdio_cleanup will have to wait at least that long before returning 1061 * with failure to allow us a proper cleanup under all circumstances 1062 */ 1063 /* 1064 * FIXME: 1065 * allocation failure possible? (Is this code needed?) 1066 */ 1067 retval = zfcp_fsf_status_read(adapter, 0); 1068 if (retval < 0) { 1069 ZFCP_LOG_INFO("Failed to create unsolicited status read " 1070 "request for the adapter %s.\n", 1071 zfcp_get_busid_by_adapter(adapter)); 1072 /* temporary fix to avoid status read buffer shortage */ 1073 adapter->status_read_failed++; 1074 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) 1075 < ZFCP_STATUS_READ_FAILED_THRESHOLD) { 1076 ZFCP_LOG_INFO("restart adapter %s due to status read " 1077 "buffer shortage\n", 1078 zfcp_get_busid_by_adapter(adapter)); 1079 zfcp_erp_adapter_reopen(adapter, 0); 1080 } 1081 } 1082 out: 1083 return retval; 1084 } 1085 1086 /* 1087 * function: zfcp_fsf_abort_fcp_command 1088 * 1089 * purpose: tells FSF to abort a running SCSI command 1090 * 1091 * returns: address of initiated FSF request 1092 * NULL - request could not be initiated 1093 * 1094 * FIXME(design): should be watched by a timeout !!! 1095 * FIXME(design) shouldn't this be modified to return an int 1096 * also...don't know how though 1097 */ 1098 struct zfcp_fsf_req * 1099 zfcp_fsf_abort_fcp_command(unsigned long old_req_id, 1100 struct zfcp_adapter *adapter, 1101 struct zfcp_unit *unit, int req_flags) 1102 { 1103 volatile struct qdio_buffer_element *sbale; 1104 unsigned long lock_flags; 1105 struct zfcp_fsf_req *fsf_req = NULL; 1106 int retval = 0; 1107 1108 /* setup new FSF request */ 1109 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, 1110 req_flags, adapter->pool.fsf_req_abort, 1111 &lock_flags, &fsf_req); 1112 if (retval < 0) { 1113 ZFCP_LOG_INFO("error: Failed to create an abort command " 1114 "request for lun 0x%016Lx on port 0x%016Lx " 1115 "on adapter %s.\n", 1116 unit->fcp_lun, 1117 unit->port->wwpn, 1118 zfcp_get_busid_by_adapter(adapter)); 1119 goto out; 1120 } 1121 1122 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1123 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1124 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1125 1126 fsf_req->data = (unsigned long) unit; 1127 1128 /* set handles of unit and its parent port in QTCB */ 1129 fsf_req->qtcb->header.lun_handle = unit->handle; 1130 fsf_req->qtcb->header.port_handle = unit->port->handle; 1131 1132 /* set handle of request which should be aborted */ 1133 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; 1134 1135 /* start QDIO request for this FSF request */ 1136 1137 zfcp_fsf_start_scsi_er_timer(adapter); 1138 retval = zfcp_fsf_req_send(fsf_req, NULL); 1139 if (retval) { 1140 del_timer(&adapter->scsi_er_timer); 1141 ZFCP_LOG_INFO("error: Failed to send abort command request " 1142 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 1143 zfcp_get_busid_by_adapter(adapter), 1144 unit->port->wwpn, unit->fcp_lun); 1145 zfcp_fsf_req_free(fsf_req); 1146 fsf_req = NULL; 1147 goto out; 1148 } 1149 1150 ZFCP_LOG_DEBUG("Abort FCP Command request initiated " 1151 "(adapter%s, port d_id=0x%08x, " 1152 "unit x%016Lx, old_req_id=0x%lx)\n", 1153 zfcp_get_busid_by_adapter(adapter), 1154 unit->port->d_id, 1155 unit->fcp_lun, old_req_id); 1156 out: 1157 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 1158 return fsf_req; 1159 } 1160 1161 /* 1162 * function: zfcp_fsf_abort_fcp_command_handler 1163 * 1164 * purpose: is called for finished Abort FCP Command request 1165 * 1166 * returns: 1167 */ 1168 static int 1169 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) 1170 { 1171 int retval = -EINVAL; 1172 struct zfcp_unit *unit; 1173 unsigned char status_qual = 1174 new_fsf_req->qtcb->header.fsf_status_qual.word[0]; 1175 1176 del_timer(&new_fsf_req->adapter->scsi_er_timer); 1177 1178 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1179 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ 1180 goto skip_fsfstatus; 1181 } 1182 1183 unit = (struct zfcp_unit *) new_fsf_req->data; 1184 1185 /* evaluate FSF status in QTCB */ 1186 switch (new_fsf_req->qtcb->header.fsf_status) { 1187 1188 case FSF_PORT_HANDLE_NOT_VALID: 1189 if (status_qual >> 4 != status_qual % 0xf) { 1190 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1191 "fsf_s_phand_nv0"); 1192 /* 1193 * In this case a command that was sent prior to a port 1194 * reopen was aborted (handles are different). This is 1195 * fine. 1196 */ 1197 } else { 1198 ZFCP_LOG_INFO("Temporary port identifier 0x%x for " 1199 "port 0x%016Lx on adapter %s invalid. " 1200 "This may happen occasionally.\n", 1201 unit->port->handle, 1202 unit->port->wwpn, 1203 zfcp_get_busid_by_unit(unit)); 1204 ZFCP_LOG_INFO("status qualifier:\n"); 1205 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1206 (char *) &new_fsf_req->qtcb->header. 1207 fsf_status_qual, 1208 sizeof (union fsf_status_qual)); 1209 /* Let's hope this sorts out the mess */ 1210 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1211 "fsf_s_phand_nv1"); 1212 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 1213 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1214 } 1215 break; 1216 1217 case FSF_LUN_HANDLE_NOT_VALID: 1218 if (status_qual >> 4 != status_qual % 0xf) { 1219 /* 2 */ 1220 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1221 "fsf_s_lhand_nv0"); 1222 /* 1223 * In this case a command that was sent prior to a unit 1224 * reopen was aborted (handles are different). 1225 * This is fine. 1226 */ 1227 } else { 1228 ZFCP_LOG_INFO 1229 ("Warning: Temporary LUN identifier 0x%x of LUN " 1230 "0x%016Lx on port 0x%016Lx on adapter %s is " 1231 "invalid. This may happen in rare cases. " 1232 "Trying to re-establish link.\n", 1233 unit->handle, 1234 unit->fcp_lun, 1235 unit->port->wwpn, 1236 zfcp_get_busid_by_unit(unit)); 1237 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 1238 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1239 (char *) &new_fsf_req->qtcb->header. 1240 fsf_status_qual, 1241 sizeof (union fsf_status_qual)); 1242 /* Let's hope this sorts out the mess */ 1243 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1244 "fsf_s_lhand_nv1"); 1245 zfcp_erp_port_reopen(unit->port, 0); 1246 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1247 } 1248 break; 1249 1250 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 1251 retval = 0; 1252 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1253 "fsf_s_no_exist"); 1254 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 1255 break; 1256 1257 case FSF_PORT_BOXED: 1258 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " 1259 "be reopened\n", unit->port->wwpn, 1260 zfcp_get_busid_by_unit(unit)); 1261 debug_text_event(new_fsf_req->adapter->erp_dbf, 2, 1262 "fsf_s_pboxed"); 1263 zfcp_erp_port_boxed(unit->port); 1264 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1265 | ZFCP_STATUS_FSFREQ_RETRY; 1266 break; 1267 1268 case FSF_LUN_BOXED: 1269 ZFCP_LOG_INFO( 1270 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " 1271 "to be reopened\n", 1272 unit->fcp_lun, unit->port->wwpn, 1273 zfcp_get_busid_by_unit(unit)); 1274 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 1275 zfcp_erp_unit_boxed(unit); 1276 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1277 | ZFCP_STATUS_FSFREQ_RETRY; 1278 break; 1279 1280 case FSF_ADAPTER_STATUS_AVAILABLE: 1281 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { 1282 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1283 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1284 "fsf_sq_ltest"); 1285 zfcp_test_link(unit->port); 1286 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1287 break; 1288 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1289 /* SCSI stack will escalate */ 1290 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1291 "fsf_sq_ulp"); 1292 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1293 break; 1294 default: 1295 ZFCP_LOG_NORMAL 1296 ("bug: Wrong status qualifier 0x%x arrived.\n", 1297 new_fsf_req->qtcb->header.fsf_status_qual.word[0]); 1298 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1299 "fsf_sq_inval:"); 1300 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1301 &new_fsf_req->qtcb->header. 1302 fsf_status_qual.word[0], sizeof (u32)); 1303 break; 1304 } 1305 break; 1306 1307 case FSF_GOOD: 1308 retval = 0; 1309 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 1310 break; 1311 1312 default: 1313 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1314 "(debug info 0x%x)\n", 1315 new_fsf_req->qtcb->header.fsf_status); 1316 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1317 "fsf_s_inval:"); 1318 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1319 &new_fsf_req->qtcb->header.fsf_status, 1320 sizeof (u32)); 1321 break; 1322 } 1323 skip_fsfstatus: 1324 return retval; 1325 } 1326 1327 /** 1328 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into 1329 * one SBALE 1330 * Two scatter-gather lists are passed, one for the reqeust and one for the 1331 * response. 1332 */ 1333 static inline int 1334 zfcp_use_one_sbal(struct scatterlist *req, int req_count, 1335 struct scatterlist *resp, int resp_count) 1336 { 1337 return ((req_count == 1) && 1338 (resp_count == 1) && 1339 (((unsigned long) zfcp_sg_to_address(&req[0]) & 1340 PAGE_MASK) == 1341 ((unsigned long) (zfcp_sg_to_address(&req[0]) + 1342 req[0].length - 1) & PAGE_MASK)) && 1343 (((unsigned long) zfcp_sg_to_address(&resp[0]) & 1344 PAGE_MASK) == 1345 ((unsigned long) (zfcp_sg_to_address(&resp[0]) + 1346 resp[0].length - 1) & PAGE_MASK))); 1347 } 1348 1349 /** 1350 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1351 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for 1352 * the request 1353 * @pool: pointer to memory pool, if non-null this pool is used to allocate 1354 * a struct zfcp_fsf_req 1355 * @erp_action: pointer to erp_action, if non-null the Generic Service request 1356 * is sent within error recovery 1357 */ 1358 int 1359 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, 1360 struct zfcp_erp_action *erp_action) 1361 { 1362 volatile struct qdio_buffer_element *sbale; 1363 struct zfcp_port *port; 1364 struct zfcp_adapter *adapter; 1365 struct zfcp_fsf_req *fsf_req; 1366 unsigned long lock_flags; 1367 int bytes; 1368 int ret = 0; 1369 1370 port = ct->port; 1371 adapter = port->adapter; 1372 1373 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, 1374 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 1375 pool, &lock_flags, &fsf_req); 1376 if (ret < 0) { 1377 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " 1378 "adapter: %s\n", 1379 zfcp_get_busid_by_adapter(adapter)); 1380 goto failed_req; 1381 } 1382 1383 if (erp_action != NULL) { 1384 erp_action->fsf_req = fsf_req; 1385 fsf_req->erp_action = erp_action; 1386 } 1387 1388 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1389 if (zfcp_use_one_sbal(ct->req, ct->req_count, 1390 ct->resp, ct->resp_count)){ 1391 /* both request buffer and response buffer 1392 fit into one sbale each */ 1393 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1394 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); 1395 sbale[2].length = ct->req[0].length; 1396 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); 1397 sbale[3].length = ct->resp[0].length; 1398 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1399 } else if (adapter->adapter_features & 1400 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1401 /* try to use chained SBALs */ 1402 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1403 SBAL_FLAGS0_TYPE_WRITE_READ, 1404 ct->req, ct->req_count, 1405 ZFCP_MAX_SBALS_PER_CT_REQ); 1406 if (bytes <= 0) { 1407 ZFCP_LOG_INFO("error: creation of CT request failed " 1408 "on adapter %s\n", 1409 zfcp_get_busid_by_adapter(adapter)); 1410 if (bytes == 0) 1411 ret = -ENOMEM; 1412 else 1413 ret = bytes; 1414 1415 goto failed_send; 1416 } 1417 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1418 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1419 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1420 SBAL_FLAGS0_TYPE_WRITE_READ, 1421 ct->resp, ct->resp_count, 1422 ZFCP_MAX_SBALS_PER_CT_REQ); 1423 if (bytes <= 0) { 1424 ZFCP_LOG_INFO("error: creation of CT request failed " 1425 "on adapter %s\n", 1426 zfcp_get_busid_by_adapter(adapter)); 1427 if (bytes == 0) 1428 ret = -ENOMEM; 1429 else 1430 ret = bytes; 1431 1432 goto failed_send; 1433 } 1434 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1435 } else { 1436 /* reject send generic request */ 1437 ZFCP_LOG_INFO( 1438 "error: microcode does not support chained SBALs," 1439 "CT request too big (adapter %s)\n", 1440 zfcp_get_busid_by_adapter(adapter)); 1441 ret = -EOPNOTSUPP; 1442 goto failed_send; 1443 } 1444 1445 /* settings in QTCB */ 1446 fsf_req->qtcb->header.port_handle = port->handle; 1447 fsf_req->qtcb->bottom.support.service_class = 1448 ZFCP_FC_SERVICE_CLASS_DEFAULT; 1449 fsf_req->qtcb->bottom.support.timeout = ct->timeout; 1450 fsf_req->data = (unsigned long) ct; 1451 1452 zfcp_san_dbf_event_ct_request(fsf_req); 1453 1454 /* start QDIO request for this FSF request */ 1455 ret = zfcp_fsf_req_send(fsf_req, ct->timer); 1456 if (ret) { 1457 ZFCP_LOG_DEBUG("error: initiation of CT request failed " 1458 "(adapter %s, port 0x%016Lx)\n", 1459 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1460 goto failed_send; 1461 } 1462 1463 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", 1464 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1465 goto out; 1466 1467 failed_send: 1468 zfcp_fsf_req_free(fsf_req); 1469 if (erp_action != NULL) { 1470 erp_action->fsf_req = NULL; 1471 } 1472 failed_req: 1473 out: 1474 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1475 lock_flags); 1476 return ret; 1477 } 1478 1479 /** 1480 * zfcp_fsf_send_ct_handler - handler for Generic Service requests 1481 * @fsf_req: pointer to struct zfcp_fsf_req 1482 * 1483 * Data specific for the Generic Service request is passed using 1484 * fsf_req->data. There we find the pointer to struct zfcp_send_ct. 1485 * Usually a specific handler for the CT request is called which is 1486 * found in this structure. 1487 */ 1488 static int 1489 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) 1490 { 1491 struct zfcp_port *port; 1492 struct zfcp_adapter *adapter; 1493 struct zfcp_send_ct *send_ct; 1494 struct fsf_qtcb_header *header; 1495 struct fsf_qtcb_bottom_support *bottom; 1496 int retval = -EINVAL; 1497 u16 subtable, rule, counter; 1498 1499 adapter = fsf_req->adapter; 1500 send_ct = (struct zfcp_send_ct *) fsf_req->data; 1501 port = send_ct->port; 1502 header = &fsf_req->qtcb->header; 1503 bottom = &fsf_req->qtcb->bottom.support; 1504 1505 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1506 goto skip_fsfstatus; 1507 1508 /* evaluate FSF status in QTCB */ 1509 switch (header->fsf_status) { 1510 1511 case FSF_GOOD: 1512 zfcp_san_dbf_event_ct_response(fsf_req); 1513 retval = 0; 1514 break; 1515 1516 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1517 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1518 "class %d.\n", 1519 zfcp_get_busid_by_port(port), 1520 ZFCP_FC_SERVICE_CLASS_DEFAULT); 1521 /* stop operation for this adapter */ 1522 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1523 zfcp_erp_adapter_shutdown(adapter, 0); 1524 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1525 break; 1526 1527 case FSF_ADAPTER_STATUS_AVAILABLE: 1528 switch (header->fsf_status_qual.word[0]){ 1529 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1530 /* reopening link to port */ 1531 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1532 zfcp_test_link(port); 1533 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1534 break; 1535 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1536 /* ERP strategy will escalate */ 1537 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1538 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1539 break; 1540 default: 1541 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " 1542 "arrived.\n", 1543 header->fsf_status_qual.word[0]); 1544 break; 1545 } 1546 break; 1547 1548 case FSF_ACCESS_DENIED: 1549 ZFCP_LOG_NORMAL("access denied, cannot send generic service " 1550 "command (adapter %s, port d_id=0x%08x)\n", 1551 zfcp_get_busid_by_port(port), port->d_id); 1552 for (counter = 0; counter < 2; counter++) { 1553 subtable = header->fsf_status_qual.halfword[counter * 2]; 1554 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1555 switch (subtable) { 1556 case FSF_SQ_CFDC_SUBTABLE_OS: 1557 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1558 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1559 case FSF_SQ_CFDC_SUBTABLE_LUN: 1560 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1561 zfcp_act_subtable_type[subtable], rule); 1562 break; 1563 } 1564 } 1565 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1566 zfcp_erp_port_access_denied(port); 1567 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1568 break; 1569 1570 case FSF_GENERIC_COMMAND_REJECTED: 1571 ZFCP_LOG_INFO("generic service command rejected " 1572 "(adapter %s, port d_id=0x%08x)\n", 1573 zfcp_get_busid_by_port(port), port->d_id); 1574 ZFCP_LOG_INFO("status qualifier:\n"); 1575 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1576 (char *) &header->fsf_status_qual, 1577 sizeof (union fsf_status_qual)); 1578 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej"); 1579 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1580 break; 1581 1582 case FSF_PORT_HANDLE_NOT_VALID: 1583 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " 1584 "0x%016Lx on adapter %s invalid. This may " 1585 "happen occasionally.\n", port->handle, 1586 port->wwpn, zfcp_get_busid_by_port(port)); 1587 ZFCP_LOG_INFO("status qualifier:\n"); 1588 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1589 (char *) &header->fsf_status_qual, 1590 sizeof (union fsf_status_qual)); 1591 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv"); 1592 zfcp_erp_adapter_reopen(adapter, 0); 1593 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1594 break; 1595 1596 case FSF_PORT_BOXED: 1597 ZFCP_LOG_INFO("port needs to be reopened " 1598 "(adapter %s, port d_id=0x%08x)\n", 1599 zfcp_get_busid_by_port(port), port->d_id); 1600 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 1601 zfcp_erp_port_boxed(port); 1602 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1603 | ZFCP_STATUS_FSFREQ_RETRY; 1604 break; 1605 1606 /* following states should never occure, all cases avoided 1607 in zfcp_fsf_send_ct - but who knows ... */ 1608 case FSF_PAYLOAD_SIZE_MISMATCH: 1609 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " 1610 "req_buf_length=%d, resp_buf_length=%d)\n", 1611 zfcp_get_busid_by_adapter(adapter), 1612 bottom->req_buf_length, bottom->resp_buf_length); 1613 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1614 break; 1615 case FSF_REQUEST_SIZE_TOO_LARGE: 1616 ZFCP_LOG_INFO("request size too large (adapter: %s, " 1617 "req_buf_length=%d)\n", 1618 zfcp_get_busid_by_adapter(adapter), 1619 bottom->req_buf_length); 1620 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1621 break; 1622 case FSF_RESPONSE_SIZE_TOO_LARGE: 1623 ZFCP_LOG_INFO("response size too large (adapter: %s, " 1624 "resp_buf_length=%d)\n", 1625 zfcp_get_busid_by_adapter(adapter), 1626 bottom->resp_buf_length); 1627 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1628 break; 1629 case FSF_SBAL_MISMATCH: 1630 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1631 "resp_buf_length=%d)\n", 1632 zfcp_get_busid_by_adapter(adapter), 1633 bottom->req_buf_length, bottom->resp_buf_length); 1634 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1635 break; 1636 1637 default: 1638 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1639 "(debug info 0x%x)\n", header->fsf_status); 1640 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); 1641 debug_exception(adapter->erp_dbf, 0, 1642 &header->fsf_status_qual.word[0], sizeof (u32)); 1643 break; 1644 } 1645 1646 skip_fsfstatus: 1647 send_ct->status = retval; 1648 1649 if (send_ct->handler != NULL) 1650 send_ct->handler(send_ct->handler_data); 1651 1652 return retval; 1653 } 1654 1655 /** 1656 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1657 * @els: pointer to struct zfcp_send_els which contains all needed data for 1658 * the command. 1659 */ 1660 int 1661 zfcp_fsf_send_els(struct zfcp_send_els *els) 1662 { 1663 volatile struct qdio_buffer_element *sbale; 1664 struct zfcp_fsf_req *fsf_req; 1665 u32 d_id; 1666 struct zfcp_adapter *adapter; 1667 unsigned long lock_flags; 1668 int bytes; 1669 int ret = 0; 1670 1671 d_id = els->d_id; 1672 adapter = els->adapter; 1673 1674 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, 1675 ZFCP_REQ_AUTO_CLEANUP, 1676 NULL, &lock_flags, &fsf_req); 1677 if (ret < 0) { 1678 ZFCP_LOG_INFO("error: creation of ELS request failed " 1679 "(adapter %s, port d_id: 0x%08x)\n", 1680 zfcp_get_busid_by_adapter(adapter), d_id); 1681 goto failed_req; 1682 } 1683 1684 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1685 if (zfcp_use_one_sbal(els->req, els->req_count, 1686 els->resp, els->resp_count)){ 1687 /* both request buffer and response buffer 1688 fit into one sbale each */ 1689 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1690 sbale[2].addr = zfcp_sg_to_address(&els->req[0]); 1691 sbale[2].length = els->req[0].length; 1692 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); 1693 sbale[3].length = els->resp[0].length; 1694 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1695 } else if (adapter->adapter_features & 1696 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1697 /* try to use chained SBALs */ 1698 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1699 SBAL_FLAGS0_TYPE_WRITE_READ, 1700 els->req, els->req_count, 1701 ZFCP_MAX_SBALS_PER_ELS_REQ); 1702 if (bytes <= 0) { 1703 ZFCP_LOG_INFO("error: creation of ELS request failed " 1704 "(adapter %s, port d_id: 0x%08x)\n", 1705 zfcp_get_busid_by_adapter(adapter), d_id); 1706 if (bytes == 0) { 1707 ret = -ENOMEM; 1708 } else { 1709 ret = bytes; 1710 } 1711 goto failed_send; 1712 } 1713 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1714 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1715 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1716 SBAL_FLAGS0_TYPE_WRITE_READ, 1717 els->resp, els->resp_count, 1718 ZFCP_MAX_SBALS_PER_ELS_REQ); 1719 if (bytes <= 0) { 1720 ZFCP_LOG_INFO("error: creation of ELS request failed " 1721 "(adapter %s, port d_id: 0x%08x)\n", 1722 zfcp_get_busid_by_adapter(adapter), d_id); 1723 if (bytes == 0) { 1724 ret = -ENOMEM; 1725 } else { 1726 ret = bytes; 1727 } 1728 goto failed_send; 1729 } 1730 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1731 } else { 1732 /* reject request */ 1733 ZFCP_LOG_INFO("error: microcode does not support chained SBALs" 1734 ", ELS request too big (adapter %s, " 1735 "port d_id: 0x%08x)\n", 1736 zfcp_get_busid_by_adapter(adapter), d_id); 1737 ret = -EOPNOTSUPP; 1738 goto failed_send; 1739 } 1740 1741 /* settings in QTCB */ 1742 fsf_req->qtcb->bottom.support.d_id = d_id; 1743 fsf_req->qtcb->bottom.support.service_class = 1744 ZFCP_FC_SERVICE_CLASS_DEFAULT; 1745 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; 1746 fsf_req->data = (unsigned long) els; 1747 1748 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1749 1750 zfcp_san_dbf_event_els_request(fsf_req); 1751 1752 /* start QDIO request for this FSF request */ 1753 ret = zfcp_fsf_req_send(fsf_req, els->timer); 1754 if (ret) { 1755 ZFCP_LOG_DEBUG("error: initiation of ELS request failed " 1756 "(adapter %s, port d_id: 0x%08x)\n", 1757 zfcp_get_busid_by_adapter(adapter), d_id); 1758 goto failed_send; 1759 } 1760 1761 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " 1762 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); 1763 goto out; 1764 1765 failed_send: 1766 zfcp_fsf_req_free(fsf_req); 1767 1768 failed_req: 1769 out: 1770 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1771 lock_flags); 1772 1773 return ret; 1774 } 1775 1776 /** 1777 * zfcp_fsf_send_els_handler - handler for ELS commands 1778 * @fsf_req: pointer to struct zfcp_fsf_req 1779 * 1780 * Data specific for the ELS command is passed using 1781 * fsf_req->data. There we find the pointer to struct zfcp_send_els. 1782 * Usually a specific handler for the ELS command is called which is 1783 * found in this structure. 1784 */ 1785 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) 1786 { 1787 struct zfcp_adapter *adapter; 1788 struct zfcp_port *port; 1789 u32 d_id; 1790 struct fsf_qtcb_header *header; 1791 struct fsf_qtcb_bottom_support *bottom; 1792 struct zfcp_send_els *send_els; 1793 int retval = -EINVAL; 1794 u16 subtable, rule, counter; 1795 1796 send_els = (struct zfcp_send_els *) fsf_req->data; 1797 adapter = send_els->adapter; 1798 port = send_els->port; 1799 d_id = send_els->d_id; 1800 header = &fsf_req->qtcb->header; 1801 bottom = &fsf_req->qtcb->bottom.support; 1802 1803 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1804 goto skip_fsfstatus; 1805 1806 switch (header->fsf_status) { 1807 1808 case FSF_GOOD: 1809 zfcp_san_dbf_event_els_response(fsf_req); 1810 retval = 0; 1811 break; 1812 1813 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1814 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1815 "class %d.\n", 1816 zfcp_get_busid_by_adapter(adapter), 1817 ZFCP_FC_SERVICE_CLASS_DEFAULT); 1818 /* stop operation for this adapter */ 1819 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1820 zfcp_erp_adapter_shutdown(adapter, 0); 1821 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1822 break; 1823 1824 case FSF_ADAPTER_STATUS_AVAILABLE: 1825 switch (header->fsf_status_qual.word[0]){ 1826 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1827 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1828 if (port && (send_els->ls_code != ZFCP_LS_ADISC)) 1829 zfcp_test_link(port); 1830 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1831 break; 1832 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1833 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1834 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1835 retval = 1836 zfcp_handle_els_rjt(header->fsf_status_qual.word[1], 1837 (struct zfcp_ls_rjt_par *) 1838 &header->fsf_status_qual.word[2]); 1839 break; 1840 case FSF_SQ_RETRY_IF_POSSIBLE: 1841 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry"); 1842 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1843 break; 1844 default: 1845 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", 1846 header->fsf_status_qual.word[0]); 1847 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1848 (char*)header->fsf_status_qual.word, 16); 1849 } 1850 break; 1851 1852 case FSF_ELS_COMMAND_REJECTED: 1853 ZFCP_LOG_INFO("ELS has been rejected because command filter " 1854 "prohibited sending " 1855 "(adapter: %s, port d_id: 0x%08x)\n", 1856 zfcp_get_busid_by_adapter(adapter), d_id); 1857 1858 break; 1859 1860 case FSF_PAYLOAD_SIZE_MISMATCH: 1861 ZFCP_LOG_INFO( 1862 "ELS request size and ELS response size must be either " 1863 "both 0, or both greater than 0 " 1864 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", 1865 zfcp_get_busid_by_adapter(adapter), 1866 bottom->req_buf_length, 1867 bottom->resp_buf_length); 1868 break; 1869 1870 case FSF_REQUEST_SIZE_TOO_LARGE: 1871 ZFCP_LOG_INFO( 1872 "Length of the ELS request buffer, " 1873 "specified in QTCB bottom, " 1874 "exceeds the size of the buffers " 1875 "that have been allocated for ELS request data " 1876 "(adapter: %s, req_buf_length=%d)\n", 1877 zfcp_get_busid_by_adapter(adapter), 1878 bottom->req_buf_length); 1879 break; 1880 1881 case FSF_RESPONSE_SIZE_TOO_LARGE: 1882 ZFCP_LOG_INFO( 1883 "Length of the ELS response buffer, " 1884 "specified in QTCB bottom, " 1885 "exceeds the size of the buffers " 1886 "that have been allocated for ELS response data " 1887 "(adapter: %s, resp_buf_length=%d)\n", 1888 zfcp_get_busid_by_adapter(adapter), 1889 bottom->resp_buf_length); 1890 break; 1891 1892 case FSF_SBAL_MISMATCH: 1893 /* should never occure, avoided in zfcp_fsf_send_els */ 1894 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1895 "resp_buf_length=%d)\n", 1896 zfcp_get_busid_by_adapter(adapter), 1897 bottom->req_buf_length, bottom->resp_buf_length); 1898 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1899 break; 1900 1901 case FSF_ACCESS_DENIED: 1902 ZFCP_LOG_NORMAL("access denied, cannot send ELS command " 1903 "(adapter %s, port d_id=0x%08x)\n", 1904 zfcp_get_busid_by_adapter(adapter), d_id); 1905 for (counter = 0; counter < 2; counter++) { 1906 subtable = header->fsf_status_qual.halfword[counter * 2]; 1907 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1908 switch (subtable) { 1909 case FSF_SQ_CFDC_SUBTABLE_OS: 1910 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1911 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1912 case FSF_SQ_CFDC_SUBTABLE_LUN: 1913 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1914 zfcp_act_subtable_type[subtable], rule); 1915 break; 1916 } 1917 } 1918 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1919 if (port != NULL) 1920 zfcp_erp_port_access_denied(port); 1921 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1922 break; 1923 1924 default: 1925 ZFCP_LOG_NORMAL( 1926 "bug: An unknown FSF Status was presented " 1927 "(adapter: %s, fsf_status=0x%08x)\n", 1928 zfcp_get_busid_by_adapter(adapter), 1929 header->fsf_status); 1930 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval"); 1931 debug_exception(adapter->erp_dbf, 0, 1932 &header->fsf_status_qual.word[0], sizeof(u32)); 1933 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1934 break; 1935 } 1936 1937 skip_fsfstatus: 1938 send_els->status = retval; 1939 1940 if (send_els->handler != 0) 1941 send_els->handler(send_els->handler_data); 1942 1943 return retval; 1944 } 1945 1946 int 1947 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 1948 { 1949 volatile struct qdio_buffer_element *sbale; 1950 unsigned long lock_flags; 1951 int retval = 0; 1952 1953 /* setup new FSF request */ 1954 retval = zfcp_fsf_req_create(erp_action->adapter, 1955 FSF_QTCB_EXCHANGE_CONFIG_DATA, 1956 ZFCP_REQ_AUTO_CLEANUP, 1957 erp_action->adapter->pool.fsf_req_erp, 1958 &lock_flags, &(erp_action->fsf_req)); 1959 if (retval < 0) { 1960 ZFCP_LOG_INFO("error: Could not create exchange configuration " 1961 "data request for adapter %s.\n", 1962 zfcp_get_busid_by_adapter(erp_action->adapter)); 1963 goto out; 1964 } 1965 1966 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 1967 erp_action->fsf_req->sbal_curr, 0); 1968 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1969 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1970 1971 erp_action->fsf_req->erp_action = erp_action; 1972 erp_action->fsf_req->qtcb->bottom.config.feature_selection = 1973 FSF_FEATURE_CFDC | 1974 FSF_FEATURE_LUN_SHARING | 1975 FSF_FEATURE_NOTIFICATION_LOST | 1976 FSF_FEATURE_UPDATE_ALERT; 1977 1978 /* start QDIO request for this FSF request */ 1979 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 1980 if (retval) { 1981 ZFCP_LOG_INFO 1982 ("error: Could not send exchange configuration data " 1983 "command on the adapter %s\n", 1984 zfcp_get_busid_by_adapter(erp_action->adapter)); 1985 zfcp_fsf_req_free(erp_action->fsf_req); 1986 erp_action->fsf_req = NULL; 1987 goto out; 1988 } 1989 1990 ZFCP_LOG_DEBUG("exchange configuration data request initiated " 1991 "(adapter %s)\n", 1992 zfcp_get_busid_by_adapter(erp_action->adapter)); 1993 1994 out: 1995 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 1996 lock_flags); 1997 return retval; 1998 } 1999 2000 /** 2001 * zfcp_fsf_exchange_config_evaluate 2002 * @fsf_req: fsf_req which belongs to xchg config data request 2003 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) 2004 * 2005 * returns: -EIO on error, 0 otherwise 2006 */ 2007 static int 2008 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2009 { 2010 struct fsf_qtcb_bottom_config *bottom; 2011 struct zfcp_adapter *adapter = fsf_req->adapter; 2012 struct Scsi_Host *shost = adapter->scsi_host; 2013 2014 bottom = &fsf_req->qtcb->bottom.config; 2015 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", 2016 bottom->low_qtcb_version, bottom->high_qtcb_version); 2017 adapter->fsf_lic_version = bottom->lic_version; 2018 adapter->adapter_features = bottom->adapter_features; 2019 adapter->connection_features = bottom->connection_features; 2020 adapter->peer_wwpn = 0; 2021 adapter->peer_wwnn = 0; 2022 adapter->peer_d_id = 0; 2023 2024 if (xchg_ok) { 2025 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; 2026 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; 2027 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; 2028 fc_host_speed(shost) = bottom->fc_link_speed; 2029 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; 2030 adapter->hydra_version = bottom->adapter_type; 2031 if (fc_host_permanent_port_name(shost) == -1) 2032 fc_host_permanent_port_name(shost) = 2033 fc_host_port_name(shost); 2034 if (bottom->fc_topology == FSF_TOPO_P2P) { 2035 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; 2036 adapter->peer_wwpn = bottom->plogi_payload.wwpn; 2037 adapter->peer_wwnn = bottom->plogi_payload.wwnn; 2038 fc_host_port_type(shost) = FC_PORTTYPE_PTP; 2039 } else if (bottom->fc_topology == FSF_TOPO_FABRIC) 2040 fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 2041 else if (bottom->fc_topology == FSF_TOPO_AL) 2042 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; 2043 else 2044 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 2045 } else { 2046 fc_host_node_name(shost) = 0; 2047 fc_host_port_name(shost) = 0; 2048 fc_host_port_id(shost) = 0; 2049 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 2050 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 2051 adapter->hydra_version = 0; 2052 } 2053 2054 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { 2055 adapter->hardware_version = bottom->hardware_version; 2056 memcpy(fc_host_serial_number(shost), bottom->serial_number, 2057 min(FC_SERIAL_NUMBER_SIZE, 17)); 2058 EBCASC(fc_host_serial_number(shost), 2059 min(FC_SERIAL_NUMBER_SIZE, 17)); 2060 } 2061 2062 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n" 2063 "WWNN 0x%016Lx, " 2064 "WWPN 0x%016Lx, " 2065 "S_ID 0x%08x,\n" 2066 "adapter version 0x%x, " 2067 "LIC version 0x%x, " 2068 "FC link speed %d Gb/s\n", 2069 zfcp_get_busid_by_adapter(adapter), 2070 (wwn_t) fc_host_node_name(shost), 2071 (wwn_t) fc_host_port_name(shost), 2072 fc_host_port_id(shost), 2073 adapter->hydra_version, 2074 adapter->fsf_lic_version, 2075 fc_host_speed(shost)); 2076 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { 2077 ZFCP_LOG_NORMAL("error: the adapter %s " 2078 "only supports newer control block " 2079 "versions in comparison to this device " 2080 "driver (try updated device driver)\n", 2081 zfcp_get_busid_by_adapter(adapter)); 2082 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); 2083 zfcp_erp_adapter_shutdown(adapter, 0); 2084 return -EIO; 2085 } 2086 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { 2087 ZFCP_LOG_NORMAL("error: the adapter %s " 2088 "only supports older control block " 2089 "versions than this device driver uses" 2090 "(consider a microcode upgrade)\n", 2091 zfcp_get_busid_by_adapter(adapter)); 2092 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); 2093 zfcp_erp_adapter_shutdown(adapter, 0); 2094 return -EIO; 2095 } 2096 return 0; 2097 } 2098 2099 /* 2100 * function: zfcp_fsf_exchange_config_data_handler 2101 * 2102 * purpose: is called for finished Exchange Configuration Data command 2103 * 2104 * returns: 2105 */ 2106 static int 2107 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) 2108 { 2109 struct fsf_qtcb_bottom_config *bottom; 2110 struct zfcp_adapter *adapter = fsf_req->adapter; 2111 struct fsf_qtcb *qtcb = fsf_req->qtcb; 2112 2113 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2114 return -EIO; 2115 2116 switch (qtcb->header.fsf_status) { 2117 2118 case FSF_GOOD: 2119 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) 2120 return -EIO; 2121 2122 switch (fc_host_port_type(adapter->scsi_host)) { 2123 case FC_PORTTYPE_PTP: 2124 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " 2125 "configuration detected at adapter %s\n" 2126 "Peer WWNN 0x%016llx, " 2127 "peer WWPN 0x%016llx, " 2128 "peer d_id 0x%06x\n", 2129 zfcp_get_busid_by_adapter(adapter), 2130 adapter->peer_wwnn, 2131 adapter->peer_wwpn, 2132 adapter->peer_d_id); 2133 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2134 "top-p-to-p"); 2135 break; 2136 case FC_PORTTYPE_NLPORT: 2137 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " 2138 "topology detected at adapter %s " 2139 "unsupported, shutting down adapter\n", 2140 zfcp_get_busid_by_adapter(adapter)); 2141 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2142 "top-al"); 2143 zfcp_erp_adapter_shutdown(adapter, 0); 2144 return -EIO; 2145 case FC_PORTTYPE_NPORT: 2146 ZFCP_LOG_NORMAL("Switched fabric fibrechannel " 2147 "network detected at adapter %s.\n", 2148 zfcp_get_busid_by_adapter(adapter)); 2149 break; 2150 default: 2151 ZFCP_LOG_NORMAL("bug: The fibrechannel topology " 2152 "reported by the exchange " 2153 "configuration command for " 2154 "the adapter %s is not " 2155 "of a type known to the zfcp " 2156 "driver, shutting down adapter\n", 2157 zfcp_get_busid_by_adapter(adapter)); 2158 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2159 "unknown-topo"); 2160 zfcp_erp_adapter_shutdown(adapter, 0); 2161 return -EIO; 2162 } 2163 bottom = &qtcb->bottom.config; 2164 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 2165 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " 2166 "allowed by the adapter %s " 2167 "is lower than the minimum " 2168 "required by the driver (%ld bytes).\n", 2169 bottom->max_qtcb_size, 2170 zfcp_get_busid_by_adapter(adapter), 2171 sizeof(struct fsf_qtcb)); 2172 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2173 "qtcb-size"); 2174 debug_event(fsf_req->adapter->erp_dbf, 0, 2175 &bottom->max_qtcb_size, sizeof (u32)); 2176 zfcp_erp_adapter_shutdown(adapter, 0); 2177 return -EIO; 2178 } 2179 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 2180 &adapter->status); 2181 break; 2182 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2183 debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); 2184 2185 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) 2186 return -EIO; 2187 2188 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); 2189 2190 zfcp_fsf_link_down_info_eval(adapter, 2191 &qtcb->header.fsf_status_qual.link_down_info); 2192 break; 2193 default: 2194 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); 2195 debug_event(fsf_req->adapter->erp_dbf, 0, 2196 &fsf_req->qtcb->header.fsf_status, sizeof (u32)); 2197 zfcp_erp_adapter_shutdown(adapter, 0); 2198 return -EIO; 2199 } 2200 return 0; 2201 } 2202 2203 /** 2204 * zfcp_fsf_exchange_port_data - request information about local port 2205 * @erp_action: ERP action for the adapter for which port data is requested 2206 * @adapter: for which port data is requested 2207 * @data: response to exchange port data request 2208 */ 2209 int 2210 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action, 2211 struct zfcp_adapter *adapter, 2212 struct fsf_qtcb_bottom_port *data) 2213 { 2214 volatile struct qdio_buffer_element *sbale; 2215 int retval = 0; 2216 unsigned long lock_flags; 2217 struct zfcp_fsf_req *fsf_req; 2218 struct timer_list *timer; 2219 2220 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { 2221 ZFCP_LOG_INFO("error: exchange port data " 2222 "command not supported by adapter %s\n", 2223 zfcp_get_busid_by_adapter(adapter)); 2224 return -EOPNOTSUPP; 2225 } 2226 2227 /* setup new FSF request */ 2228 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 2229 erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0, 2230 0, &lock_flags, &fsf_req); 2231 if (retval < 0) { 2232 ZFCP_LOG_INFO("error: Out of resources. Could not create an " 2233 "exchange port data request for" 2234 "the adapter %s.\n", 2235 zfcp_get_busid_by_adapter(adapter)); 2236 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2237 lock_flags); 2238 return retval; 2239 } 2240 2241 if (data) 2242 fsf_req->data = (unsigned long) data; 2243 2244 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2245 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2246 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2247 2248 if (erp_action) { 2249 erp_action->fsf_req = fsf_req; 2250 fsf_req->erp_action = erp_action; 2251 timer = &erp_action->timer; 2252 } else { 2253 timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC); 2254 if (!timer) { 2255 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2256 lock_flags); 2257 zfcp_fsf_req_free(fsf_req); 2258 return -ENOMEM; 2259 } 2260 init_timer(timer); 2261 timer->function = zfcp_fsf_request_timeout_handler; 2262 timer->data = (unsigned long) adapter; 2263 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; 2264 } 2265 2266 retval = zfcp_fsf_req_send(fsf_req, timer); 2267 if (retval) { 2268 ZFCP_LOG_INFO("error: Could not send an exchange port data " 2269 "command on the adapter %s\n", 2270 zfcp_get_busid_by_adapter(adapter)); 2271 zfcp_fsf_req_free(fsf_req); 2272 if (erp_action) 2273 erp_action->fsf_req = NULL; 2274 else 2275 kfree(timer); 2276 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2277 lock_flags); 2278 return retval; 2279 } 2280 2281 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 2282 2283 if (!erp_action) { 2284 wait_event(fsf_req->completion_wq, 2285 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 2286 del_timer_sync(timer); 2287 zfcp_fsf_req_free(fsf_req); 2288 kfree(timer); 2289 } 2290 return retval; 2291 } 2292 2293 /** 2294 * zfcp_fsf_exchange_port_evaluate 2295 * @fsf_req: fsf_req which belongs to xchg port data request 2296 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) 2297 */ 2298 static void 2299 zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2300 { 2301 struct zfcp_adapter *adapter; 2302 struct fsf_qtcb *qtcb; 2303 struct fsf_qtcb_bottom_port *bottom, *data; 2304 struct Scsi_Host *shost; 2305 2306 adapter = fsf_req->adapter; 2307 qtcb = fsf_req->qtcb; 2308 bottom = &qtcb->bottom.port; 2309 shost = adapter->scsi_host; 2310 2311 data = (struct fsf_qtcb_bottom_port*) fsf_req->data; 2312 if (data) 2313 memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port)); 2314 2315 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) 2316 fc_host_permanent_port_name(shost) = bottom->wwpn; 2317 else 2318 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 2319 fc_host_maxframe_size(shost) = bottom->maximum_frame_size; 2320 fc_host_supported_speeds(shost) = bottom->supported_speed; 2321 } 2322 2323 /** 2324 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request 2325 * @fsf_req: pointer to struct zfcp_fsf_req 2326 */ 2327 static void 2328 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) 2329 { 2330 struct zfcp_adapter *adapter; 2331 struct fsf_qtcb *qtcb; 2332 2333 adapter = fsf_req->adapter; 2334 qtcb = fsf_req->qtcb; 2335 2336 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2337 return; 2338 2339 switch (qtcb->header.fsf_status) { 2340 case FSF_GOOD: 2341 zfcp_fsf_exchange_port_evaluate(fsf_req, 1); 2342 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); 2343 break; 2344 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2345 zfcp_fsf_exchange_port_evaluate(fsf_req, 0); 2346 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); 2347 zfcp_fsf_link_down_info_eval(adapter, 2348 &qtcb->header.fsf_status_qual.link_down_info); 2349 break; 2350 default: 2351 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng"); 2352 debug_event(adapter->erp_dbf, 0, 2353 &fsf_req->qtcb->header.fsf_status, sizeof(u32)); 2354 } 2355 } 2356 2357 2358 /* 2359 * function: zfcp_fsf_open_port 2360 * 2361 * purpose: 2362 * 2363 * returns: address of initiated FSF request 2364 * NULL - request could not be initiated 2365 */ 2366 int 2367 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 2368 { 2369 volatile struct qdio_buffer_element *sbale; 2370 unsigned long lock_flags; 2371 int retval = 0; 2372 2373 /* setup new FSF request */ 2374 retval = zfcp_fsf_req_create(erp_action->adapter, 2375 FSF_QTCB_OPEN_PORT_WITH_DID, 2376 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2377 erp_action->adapter->pool.fsf_req_erp, 2378 &lock_flags, &(erp_action->fsf_req)); 2379 if (retval < 0) { 2380 ZFCP_LOG_INFO("error: Could not create open port request " 2381 "for port 0x%016Lx on adapter %s.\n", 2382 erp_action->port->wwpn, 2383 zfcp_get_busid_by_adapter(erp_action->adapter)); 2384 goto out; 2385 } 2386 2387 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2388 erp_action->fsf_req->sbal_curr, 0); 2389 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2390 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2391 2392 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; 2393 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); 2394 erp_action->fsf_req->data = (unsigned long) erp_action->port; 2395 erp_action->fsf_req->erp_action = erp_action; 2396 2397 /* start QDIO request for this FSF request */ 2398 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2399 if (retval) { 2400 ZFCP_LOG_INFO("error: Could not send open port request for " 2401 "port 0x%016Lx on adapter %s.\n", 2402 erp_action->port->wwpn, 2403 zfcp_get_busid_by_adapter(erp_action->adapter)); 2404 zfcp_fsf_req_free(erp_action->fsf_req); 2405 erp_action->fsf_req = NULL; 2406 goto out; 2407 } 2408 2409 ZFCP_LOG_DEBUG("open port request initiated " 2410 "(adapter %s, port 0x%016Lx)\n", 2411 zfcp_get_busid_by_adapter(erp_action->adapter), 2412 erp_action->port->wwpn); 2413 out: 2414 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2415 lock_flags); 2416 return retval; 2417 } 2418 2419 /* 2420 * function: zfcp_fsf_open_port_handler 2421 * 2422 * purpose: is called for finished Open Port command 2423 * 2424 * returns: 2425 */ 2426 static int 2427 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) 2428 { 2429 int retval = -EINVAL; 2430 struct zfcp_port *port; 2431 struct fsf_plogi *plogi; 2432 struct fsf_qtcb_header *header; 2433 u16 subtable, rule, counter; 2434 2435 port = (struct zfcp_port *) fsf_req->data; 2436 header = &fsf_req->qtcb->header; 2437 2438 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2439 /* don't change port status in our bookkeeping */ 2440 goto skip_fsfstatus; 2441 } 2442 2443 /* evaluate FSF status in QTCB */ 2444 switch (header->fsf_status) { 2445 2446 case FSF_PORT_ALREADY_OPEN: 2447 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " 2448 "is already open.\n", 2449 port->wwpn, zfcp_get_busid_by_port(port)); 2450 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2451 "fsf_s_popen"); 2452 /* 2453 * This is a bug, however operation should continue normally 2454 * if it is simply ignored 2455 */ 2456 break; 2457 2458 case FSF_ACCESS_DENIED: 2459 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " 2460 "on adapter %s\n", 2461 port->wwpn, zfcp_get_busid_by_port(port)); 2462 for (counter = 0; counter < 2; counter++) { 2463 subtable = header->fsf_status_qual.halfword[counter * 2]; 2464 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2465 switch (subtable) { 2466 case FSF_SQ_CFDC_SUBTABLE_OS: 2467 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2468 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2469 case FSF_SQ_CFDC_SUBTABLE_LUN: 2470 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2471 zfcp_act_subtable_type[subtable], rule); 2472 break; 2473 } 2474 } 2475 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2476 zfcp_erp_port_access_denied(port); 2477 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2478 break; 2479 2480 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 2481 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " 2482 "The remote port 0x%016Lx on adapter %s " 2483 "could not be opened. Disabling it.\n", 2484 port->wwpn, zfcp_get_busid_by_port(port)); 2485 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2486 "fsf_s_max_ports"); 2487 zfcp_erp_port_failed(port); 2488 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2489 break; 2490 2491 case FSF_ADAPTER_STATUS_AVAILABLE: 2492 switch (header->fsf_status_qual.word[0]) { 2493 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2494 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2495 "fsf_sq_ltest"); 2496 /* ERP strategy will escalate */ 2497 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2498 break; 2499 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2500 /* ERP strategy will escalate */ 2501 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2502 "fsf_sq_ulp"); 2503 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2504 break; 2505 case FSF_SQ_NO_RETRY_POSSIBLE: 2506 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " 2507 "adapter %s could not be opened. " 2508 "Disabling it.\n", 2509 port->wwpn, 2510 zfcp_get_busid_by_port(port)); 2511 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2512 "fsf_sq_no_retry"); 2513 zfcp_erp_port_failed(port); 2514 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2515 break; 2516 default: 2517 ZFCP_LOG_NORMAL 2518 ("bug: Wrong status qualifier 0x%x arrived.\n", 2519 header->fsf_status_qual.word[0]); 2520 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2521 "fsf_sq_inval:"); 2522 debug_exception( 2523 fsf_req->adapter->erp_dbf, 0, 2524 &header->fsf_status_qual.word[0], 2525 sizeof (u32)); 2526 break; 2527 } 2528 break; 2529 2530 case FSF_GOOD: 2531 /* save port handle assigned by FSF */ 2532 port->handle = header->port_handle; 2533 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " 2534 "was opened, it's port handle is 0x%x\n", 2535 port->wwpn, zfcp_get_busid_by_port(port), 2536 port->handle); 2537 /* mark port as open */ 2538 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | 2539 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2540 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 2541 ZFCP_STATUS_COMMON_ACCESS_BOXED, 2542 &port->status); 2543 retval = 0; 2544 /* check whether D_ID has changed during open */ 2545 /* 2546 * FIXME: This check is not airtight, as the FCP channel does 2547 * not monitor closures of target port connections caused on 2548 * the remote side. Thus, they might miss out on invalidating 2549 * locally cached WWPNs (and other N_Port parameters) of gone 2550 * target ports. So, our heroic attempt to make things safe 2551 * could be undermined by 'open port' response data tagged with 2552 * obsolete WWPNs. Another reason to monitor potential 2553 * connection closures ourself at least (by interpreting 2554 * incoming ELS' and unsolicited status). It just crosses my 2555 * mind that one should be able to cross-check by means of 2556 * another GID_PN straight after a port has been opened. 2557 * Alternately, an ADISC/PDISC ELS should suffice, as well. 2558 */ 2559 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; 2560 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) 2561 { 2562 if (fsf_req->qtcb->bottom.support.els1_length < 2563 sizeof (struct fsf_plogi)) { 2564 ZFCP_LOG_INFO( 2565 "warning: insufficient length of " 2566 "PLOGI payload (%i)\n", 2567 fsf_req->qtcb->bottom.support.els1_length); 2568 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2569 "fsf_s_short_plogi:"); 2570 /* skip sanity check and assume wwpn is ok */ 2571 } else { 2572 if (plogi->serv_param.wwpn != port->wwpn) { 2573 ZFCP_LOG_INFO("warning: d_id of port " 2574 "0x%016Lx changed during " 2575 "open\n", port->wwpn); 2576 debug_text_event( 2577 fsf_req->adapter->erp_dbf, 0, 2578 "fsf_s_did_change:"); 2579 atomic_clear_mask( 2580 ZFCP_STATUS_PORT_DID_DID, 2581 &port->status); 2582 } else { 2583 port->wwnn = plogi->serv_param.wwnn; 2584 zfcp_plogi_evaluate(port, plogi); 2585 } 2586 } 2587 } 2588 break; 2589 2590 case FSF_UNKNOWN_OP_SUBTYPE: 2591 /* should never occure, subtype not set in zfcp_fsf_open_port */ 2592 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " 2593 "op_subtype=0x%x)\n", 2594 zfcp_get_busid_by_port(port), 2595 fsf_req->qtcb->bottom.support.operation_subtype); 2596 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2597 break; 2598 2599 default: 2600 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2601 "(debug info 0x%x)\n", 2602 header->fsf_status); 2603 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2604 debug_exception(fsf_req->adapter->erp_dbf, 0, 2605 &header->fsf_status, sizeof (u32)); 2606 break; 2607 } 2608 2609 skip_fsfstatus: 2610 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); 2611 return retval; 2612 } 2613 2614 /* 2615 * function: zfcp_fsf_close_port 2616 * 2617 * purpose: submit FSF command "close port" 2618 * 2619 * returns: address of initiated FSF request 2620 * NULL - request could not be initiated 2621 */ 2622 int 2623 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 2624 { 2625 volatile struct qdio_buffer_element *sbale; 2626 unsigned long lock_flags; 2627 int retval = 0; 2628 2629 /* setup new FSF request */ 2630 retval = zfcp_fsf_req_create(erp_action->adapter, 2631 FSF_QTCB_CLOSE_PORT, 2632 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2633 erp_action->adapter->pool.fsf_req_erp, 2634 &lock_flags, &(erp_action->fsf_req)); 2635 if (retval < 0) { 2636 ZFCP_LOG_INFO("error: Could not create a close port request " 2637 "for port 0x%016Lx on adapter %s.\n", 2638 erp_action->port->wwpn, 2639 zfcp_get_busid_by_adapter(erp_action->adapter)); 2640 goto out; 2641 } 2642 2643 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2644 erp_action->fsf_req->sbal_curr, 0); 2645 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2646 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2647 2648 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); 2649 erp_action->fsf_req->data = (unsigned long) erp_action->port; 2650 erp_action->fsf_req->erp_action = erp_action; 2651 erp_action->fsf_req->qtcb->header.port_handle = 2652 erp_action->port->handle; 2653 2654 /* start QDIO request for this FSF request */ 2655 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2656 if (retval) { 2657 ZFCP_LOG_INFO("error: Could not send a close port request for " 2658 "port 0x%016Lx on adapter %s.\n", 2659 erp_action->port->wwpn, 2660 zfcp_get_busid_by_adapter(erp_action->adapter)); 2661 zfcp_fsf_req_free(erp_action->fsf_req); 2662 erp_action->fsf_req = NULL; 2663 goto out; 2664 } 2665 2666 ZFCP_LOG_TRACE("close port request initiated " 2667 "(adapter %s, port 0x%016Lx)\n", 2668 zfcp_get_busid_by_adapter(erp_action->adapter), 2669 erp_action->port->wwpn); 2670 out: 2671 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2672 lock_flags); 2673 return retval; 2674 } 2675 2676 /* 2677 * function: zfcp_fsf_close_port_handler 2678 * 2679 * purpose: is called for finished Close Port FSF command 2680 * 2681 * returns: 2682 */ 2683 static int 2684 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) 2685 { 2686 int retval = -EINVAL; 2687 struct zfcp_port *port; 2688 2689 port = (struct zfcp_port *) fsf_req->data; 2690 2691 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2692 /* don't change port status in our bookkeeping */ 2693 goto skip_fsfstatus; 2694 } 2695 2696 /* evaluate FSF status in QTCB */ 2697 switch (fsf_req->qtcb->header.fsf_status) { 2698 2699 case FSF_PORT_HANDLE_NOT_VALID: 2700 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 2701 "0x%016Lx on adapter %s invalid. This may happen " 2702 "occasionally.\n", port->handle, 2703 port->wwpn, zfcp_get_busid_by_port(port)); 2704 ZFCP_LOG_DEBUG("status qualifier:\n"); 2705 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2706 (char *) &fsf_req->qtcb->header.fsf_status_qual, 2707 sizeof (union fsf_status_qual)); 2708 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2709 "fsf_s_phand_nv"); 2710 zfcp_erp_adapter_reopen(port->adapter, 0); 2711 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2712 break; 2713 2714 case FSF_ADAPTER_STATUS_AVAILABLE: 2715 /* Note: FSF has actually closed the port in this case. 2716 * The status code is just daft. Fingers crossed for a change 2717 */ 2718 retval = 0; 2719 break; 2720 2721 case FSF_GOOD: 2722 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " 2723 "port handle 0x%x\n", port->wwpn, 2724 zfcp_get_busid_by_port(port), port->handle); 2725 zfcp_erp_modify_port_status(port, 2726 ZFCP_STATUS_COMMON_OPEN, 2727 ZFCP_CLEAR); 2728 retval = 0; 2729 break; 2730 2731 default: 2732 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2733 "(debug info 0x%x)\n", 2734 fsf_req->qtcb->header.fsf_status); 2735 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2736 debug_exception(fsf_req->adapter->erp_dbf, 0, 2737 &fsf_req->qtcb->header.fsf_status, 2738 sizeof (u32)); 2739 break; 2740 } 2741 2742 skip_fsfstatus: 2743 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); 2744 return retval; 2745 } 2746 2747 /* 2748 * function: zfcp_fsf_close_physical_port 2749 * 2750 * purpose: submit FSF command "close physical port" 2751 * 2752 * returns: address of initiated FSF request 2753 * NULL - request could not be initiated 2754 */ 2755 int 2756 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 2757 { 2758 int retval = 0; 2759 unsigned long lock_flags; 2760 volatile struct qdio_buffer_element *sbale; 2761 2762 /* setup new FSF request */ 2763 retval = zfcp_fsf_req_create(erp_action->adapter, 2764 FSF_QTCB_CLOSE_PHYSICAL_PORT, 2765 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2766 erp_action->adapter->pool.fsf_req_erp, 2767 &lock_flags, &erp_action->fsf_req); 2768 if (retval < 0) { 2769 ZFCP_LOG_INFO("error: Could not create close physical port " 2770 "request (adapter %s, port 0x%016Lx)\n", 2771 zfcp_get_busid_by_adapter(erp_action->adapter), 2772 erp_action->port->wwpn); 2773 2774 goto out; 2775 } 2776 2777 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2778 erp_action->fsf_req->sbal_curr, 0); 2779 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2780 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2781 2782 /* mark port as being closed */ 2783 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, 2784 &erp_action->port->status); 2785 /* save a pointer to this port */ 2786 erp_action->fsf_req->data = (unsigned long) erp_action->port; 2787 /* port to be closed */ 2788 erp_action->fsf_req->qtcb->header.port_handle = 2789 erp_action->port->handle; 2790 erp_action->fsf_req->erp_action = erp_action; 2791 2792 /* start QDIO request for this FSF request */ 2793 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2794 if (retval) { 2795 ZFCP_LOG_INFO("error: Could not send close physical port " 2796 "request (adapter %s, port 0x%016Lx)\n", 2797 zfcp_get_busid_by_adapter(erp_action->adapter), 2798 erp_action->port->wwpn); 2799 zfcp_fsf_req_free(erp_action->fsf_req); 2800 erp_action->fsf_req = NULL; 2801 goto out; 2802 } 2803 2804 ZFCP_LOG_TRACE("close physical port request initiated " 2805 "(adapter %s, port 0x%016Lx)\n", 2806 zfcp_get_busid_by_adapter(erp_action->adapter), 2807 erp_action->port->wwpn); 2808 out: 2809 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2810 lock_flags); 2811 return retval; 2812 } 2813 2814 /* 2815 * function: zfcp_fsf_close_physical_port_handler 2816 * 2817 * purpose: is called for finished Close Physical Port FSF command 2818 * 2819 * returns: 2820 */ 2821 static int 2822 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) 2823 { 2824 int retval = -EINVAL; 2825 struct zfcp_port *port; 2826 struct zfcp_unit *unit; 2827 struct fsf_qtcb_header *header; 2828 u16 subtable, rule, counter; 2829 2830 port = (struct zfcp_port *) fsf_req->data; 2831 header = &fsf_req->qtcb->header; 2832 2833 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2834 /* don't change port status in our bookkeeping */ 2835 goto skip_fsfstatus; 2836 } 2837 2838 /* evaluate FSF status in QTCB */ 2839 switch (header->fsf_status) { 2840 2841 case FSF_PORT_HANDLE_NOT_VALID: 2842 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" 2843 "(adapter %s, port 0x%016Lx). " 2844 "This may happen occasionally.\n", 2845 port->handle, 2846 zfcp_get_busid_by_port(port), 2847 port->wwpn); 2848 ZFCP_LOG_DEBUG("status qualifier:\n"); 2849 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2850 (char *) &header->fsf_status_qual, 2851 sizeof (union fsf_status_qual)); 2852 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2853 "fsf_s_phand_nv"); 2854 zfcp_erp_adapter_reopen(port->adapter, 0); 2855 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2856 break; 2857 2858 case FSF_ACCESS_DENIED: 2859 ZFCP_LOG_NORMAL("Access denied, cannot close " 2860 "physical port 0x%016Lx on adapter %s\n", 2861 port->wwpn, zfcp_get_busid_by_port(port)); 2862 for (counter = 0; counter < 2; counter++) { 2863 subtable = header->fsf_status_qual.halfword[counter * 2]; 2864 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2865 switch (subtable) { 2866 case FSF_SQ_CFDC_SUBTABLE_OS: 2867 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2868 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2869 case FSF_SQ_CFDC_SUBTABLE_LUN: 2870 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2871 zfcp_act_subtable_type[subtable], rule); 2872 break; 2873 } 2874 } 2875 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2876 zfcp_erp_port_access_denied(port); 2877 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2878 break; 2879 2880 case FSF_PORT_BOXED: 2881 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " 2882 "%s needs to be reopened but it was attempted " 2883 "to close it physically.\n", 2884 port->wwpn, 2885 zfcp_get_busid_by_port(port)); 2886 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); 2887 zfcp_erp_port_boxed(port); 2888 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2889 ZFCP_STATUS_FSFREQ_RETRY; 2890 break; 2891 2892 case FSF_ADAPTER_STATUS_AVAILABLE: 2893 switch (header->fsf_status_qual.word[0]) { 2894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2895 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2896 "fsf_sq_ltest"); 2897 /* This will now be escalated by ERP */ 2898 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2899 break; 2900 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2901 /* ERP strategy will escalate */ 2902 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2903 "fsf_sq_ulp"); 2904 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2905 break; 2906 default: 2907 ZFCP_LOG_NORMAL 2908 ("bug: Wrong status qualifier 0x%x arrived.\n", 2909 header->fsf_status_qual.word[0]); 2910 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2911 "fsf_sq_inval:"); 2912 debug_exception( 2913 fsf_req->adapter->erp_dbf, 0, 2914 &header->fsf_status_qual.word[0], sizeof (u32)); 2915 break; 2916 } 2917 break; 2918 2919 case FSF_GOOD: 2920 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " 2921 "physically closed, port handle 0x%x\n", 2922 port->wwpn, 2923 zfcp_get_busid_by_port(port), port->handle); 2924 /* can't use generic zfcp_erp_modify_port_status because 2925 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 2926 */ 2927 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2928 list_for_each_entry(unit, &port->unit_list_head, list) 2929 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 2930 retval = 0; 2931 break; 2932 2933 default: 2934 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2935 "(debug info 0x%x)\n", 2936 header->fsf_status); 2937 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2938 debug_exception(fsf_req->adapter->erp_dbf, 0, 2939 &header->fsf_status, sizeof (u32)); 2940 break; 2941 } 2942 2943 skip_fsfstatus: 2944 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); 2945 return retval; 2946 } 2947 2948 /* 2949 * function: zfcp_fsf_open_unit 2950 * 2951 * purpose: 2952 * 2953 * returns: 2954 * 2955 * assumptions: This routine does not check whether the associated 2956 * remote port has already been opened. This should be 2957 * done by calling routines. Otherwise some status 2958 * may be presented by FSF 2959 */ 2960 int 2961 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 2962 { 2963 volatile struct qdio_buffer_element *sbale; 2964 unsigned long lock_flags; 2965 int retval = 0; 2966 2967 /* setup new FSF request */ 2968 retval = zfcp_fsf_req_create(erp_action->adapter, 2969 FSF_QTCB_OPEN_LUN, 2970 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2971 erp_action->adapter->pool.fsf_req_erp, 2972 &lock_flags, &(erp_action->fsf_req)); 2973 if (retval < 0) { 2974 ZFCP_LOG_INFO("error: Could not create open unit request for " 2975 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 2976 erp_action->unit->fcp_lun, 2977 erp_action->unit->port->wwpn, 2978 zfcp_get_busid_by_adapter(erp_action->adapter)); 2979 goto out; 2980 } 2981 2982 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2983 erp_action->fsf_req->sbal_curr, 0); 2984 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2985 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2986 2987 erp_action->fsf_req->qtcb->header.port_handle = 2988 erp_action->port->handle; 2989 erp_action->fsf_req->qtcb->bottom.support.fcp_lun = 2990 erp_action->unit->fcp_lun; 2991 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) 2992 erp_action->fsf_req->qtcb->bottom.support.option = 2993 FSF_OPEN_LUN_SUPPRESS_BOXING; 2994 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); 2995 erp_action->fsf_req->data = (unsigned long) erp_action->unit; 2996 erp_action->fsf_req->erp_action = erp_action; 2997 2998 /* start QDIO request for this FSF request */ 2999 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 3000 if (retval) { 3001 ZFCP_LOG_INFO("error: Could not send an open unit request " 3002 "on the adapter %s, port 0x%016Lx for " 3003 "unit 0x%016Lx\n", 3004 zfcp_get_busid_by_adapter(erp_action->adapter), 3005 erp_action->port->wwpn, 3006 erp_action->unit->fcp_lun); 3007 zfcp_fsf_req_free(erp_action->fsf_req); 3008 erp_action->fsf_req = NULL; 3009 goto out; 3010 } 3011 3012 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " 3013 "port 0x%016Lx, unit 0x%016Lx)\n", 3014 zfcp_get_busid_by_adapter(erp_action->adapter), 3015 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3016 out: 3017 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3018 lock_flags); 3019 return retval; 3020 } 3021 3022 /* 3023 * function: zfcp_fsf_open_unit_handler 3024 * 3025 * purpose: is called for finished Open LUN command 3026 * 3027 * returns: 3028 */ 3029 static int 3030 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) 3031 { 3032 int retval = -EINVAL; 3033 struct zfcp_adapter *adapter; 3034 struct zfcp_unit *unit; 3035 struct fsf_qtcb_header *header; 3036 struct fsf_qtcb_bottom_support *bottom; 3037 struct fsf_queue_designator *queue_designator; 3038 u16 subtable, rule, counter; 3039 int exclusive, readwrite; 3040 3041 unit = (struct zfcp_unit *) fsf_req->data; 3042 3043 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3044 /* don't change unit status in our bookkeeping */ 3045 goto skip_fsfstatus; 3046 } 3047 3048 adapter = fsf_req->adapter; 3049 header = &fsf_req->qtcb->header; 3050 bottom = &fsf_req->qtcb->bottom.support; 3051 queue_designator = &header->fsf_status_qual.fsf_queue_designator; 3052 3053 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 3054 ZFCP_STATUS_UNIT_SHARED | 3055 ZFCP_STATUS_UNIT_READONLY, 3056 &unit->status); 3057 3058 /* evaluate FSF status in QTCB */ 3059 switch (header->fsf_status) { 3060 3061 case FSF_PORT_HANDLE_NOT_VALID: 3062 ZFCP_LOG_INFO("Temporary port identifier 0x%x " 3063 "for port 0x%016Lx on adapter %s invalid " 3064 "This may happen occasionally\n", 3065 unit->port->handle, 3066 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3067 ZFCP_LOG_DEBUG("status qualifier:\n"); 3068 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3069 (char *) &header->fsf_status_qual, 3070 sizeof (union fsf_status_qual)); 3071 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); 3072 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3073 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3074 break; 3075 3076 case FSF_LUN_ALREADY_OPEN: 3077 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " 3078 "remote port 0x%016Lx on adapter %s twice.\n", 3079 unit->fcp_lun, 3080 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3081 debug_text_exception(adapter->erp_dbf, 0, 3082 "fsf_s_uopen"); 3083 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3084 break; 3085 3086 case FSF_ACCESS_DENIED: 3087 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " 3088 "remote port 0x%016Lx on adapter %s\n", 3089 unit->fcp_lun, unit->port->wwpn, 3090 zfcp_get_busid_by_unit(unit)); 3091 for (counter = 0; counter < 2; counter++) { 3092 subtable = header->fsf_status_qual.halfword[counter * 2]; 3093 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3094 switch (subtable) { 3095 case FSF_SQ_CFDC_SUBTABLE_OS: 3096 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3097 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3098 case FSF_SQ_CFDC_SUBTABLE_LUN: 3099 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3100 zfcp_act_subtable_type[subtable], rule); 3101 break; 3102 } 3103 } 3104 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 3105 zfcp_erp_unit_access_denied(unit); 3106 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3107 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3108 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3109 break; 3110 3111 case FSF_PORT_BOXED: 3112 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3113 "needs to be reopened\n", 3114 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3115 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 3116 zfcp_erp_port_boxed(unit->port); 3117 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3118 ZFCP_STATUS_FSFREQ_RETRY; 3119 break; 3120 3121 case FSF_LUN_SHARING_VIOLATION: 3122 if (header->fsf_status_qual.word[0] != 0) { 3123 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " 3124 "with WWPN 0x%Lx " 3125 "connected to the adapter %s " 3126 "is already in use in LPAR%d, CSS%d\n", 3127 unit->fcp_lun, 3128 unit->port->wwpn, 3129 zfcp_get_busid_by_unit(unit), 3130 queue_designator->hla, 3131 queue_designator->cssid); 3132 } else { 3133 subtable = header->fsf_status_qual.halfword[4]; 3134 rule = header->fsf_status_qual.halfword[5]; 3135 switch (subtable) { 3136 case FSF_SQ_CFDC_SUBTABLE_OS: 3137 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3138 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3139 case FSF_SQ_CFDC_SUBTABLE_LUN: 3140 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " 3141 "remote port with WWPN 0x%Lx " 3142 "connected to the adapter %s " 3143 "is denied (%s rule %d)\n", 3144 unit->fcp_lun, 3145 unit->port->wwpn, 3146 zfcp_get_busid_by_unit(unit), 3147 zfcp_act_subtable_type[subtable], 3148 rule); 3149 break; 3150 } 3151 } 3152 ZFCP_LOG_DEBUG("status qualifier:\n"); 3153 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3154 (char *) &header->fsf_status_qual, 3155 sizeof (union fsf_status_qual)); 3156 debug_text_event(adapter->erp_dbf, 2, 3157 "fsf_s_l_sh_vio"); 3158 zfcp_erp_unit_access_denied(unit); 3159 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3160 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3161 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3162 break; 3163 3164 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 3165 ZFCP_LOG_INFO("error: The adapter ran out of resources. " 3166 "There is no handle (temporary port identifier) " 3167 "available for unit 0x%016Lx on port 0x%016Lx " 3168 "on adapter %s\n", 3169 unit->fcp_lun, 3170 unit->port->wwpn, 3171 zfcp_get_busid_by_unit(unit)); 3172 debug_text_event(adapter->erp_dbf, 1, 3173 "fsf_s_max_units"); 3174 zfcp_erp_unit_failed(unit); 3175 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3176 break; 3177 3178 case FSF_ADAPTER_STATUS_AVAILABLE: 3179 switch (header->fsf_status_qual.word[0]) { 3180 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3181 /* Re-establish link to port */ 3182 debug_text_event(adapter->erp_dbf, 1, 3183 "fsf_sq_ltest"); 3184 zfcp_test_link(unit->port); 3185 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3186 break; 3187 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3188 /* ERP strategy will escalate */ 3189 debug_text_event(adapter->erp_dbf, 1, 3190 "fsf_sq_ulp"); 3191 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3192 break; 3193 default: 3194 ZFCP_LOG_NORMAL 3195 ("bug: Wrong status qualifier 0x%x arrived.\n", 3196 header->fsf_status_qual.word[0]); 3197 debug_text_event(adapter->erp_dbf, 0, 3198 "fsf_sq_inval:"); 3199 debug_exception(adapter->erp_dbf, 0, 3200 &header->fsf_status_qual.word[0], 3201 sizeof (u32)); 3202 } 3203 break; 3204 3205 case FSF_INVALID_COMMAND_OPTION: 3206 ZFCP_LOG_NORMAL( 3207 "Invalid option 0x%x has been specified " 3208 "in QTCB bottom sent to the adapter %s\n", 3209 bottom->option, 3210 zfcp_get_busid_by_adapter(adapter)); 3211 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3212 retval = -EINVAL; 3213 break; 3214 3215 case FSF_GOOD: 3216 /* save LUN handle assigned by FSF */ 3217 unit->handle = header->lun_handle; 3218 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " 3219 "adapter %s opened, port handle 0x%x\n", 3220 unit->fcp_lun, 3221 unit->port->wwpn, 3222 zfcp_get_busid_by_unit(unit), 3223 unit->handle); 3224 /* mark unit as open */ 3225 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3226 3227 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && 3228 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && 3229 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) { 3230 exclusive = (bottom->lun_access_info & 3231 FSF_UNIT_ACCESS_EXCLUSIVE); 3232 readwrite = (bottom->lun_access_info & 3233 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER); 3234 3235 if (!exclusive) 3236 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, 3237 &unit->status); 3238 3239 if (!readwrite) { 3240 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, 3241 &unit->status); 3242 ZFCP_LOG_NORMAL("read-only access for unit " 3243 "(adapter %s, wwpn=0x%016Lx, " 3244 "fcp_lun=0x%016Lx)\n", 3245 zfcp_get_busid_by_unit(unit), 3246 unit->port->wwpn, 3247 unit->fcp_lun); 3248 } 3249 3250 if (exclusive && !readwrite) { 3251 ZFCP_LOG_NORMAL("exclusive access of read-only " 3252 "unit not supported\n"); 3253 zfcp_erp_unit_failed(unit); 3254 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3255 zfcp_erp_unit_shutdown(unit, 0); 3256 } else if (!exclusive && readwrite) { 3257 ZFCP_LOG_NORMAL("shared access of read-write " 3258 "unit not supported\n"); 3259 zfcp_erp_unit_failed(unit); 3260 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3261 zfcp_erp_unit_shutdown(unit, 0); 3262 } 3263 } 3264 3265 retval = 0; 3266 break; 3267 3268 default: 3269 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3270 "(debug info 0x%x)\n", 3271 header->fsf_status); 3272 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); 3273 debug_exception(adapter->erp_dbf, 0, 3274 &header->fsf_status, sizeof (u32)); 3275 break; 3276 } 3277 3278 skip_fsfstatus: 3279 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); 3280 return retval; 3281 } 3282 3283 /* 3284 * function: zfcp_fsf_close_unit 3285 * 3286 * purpose: 3287 * 3288 * returns: address of fsf_req - request successfully initiated 3289 * NULL - 3290 * 3291 * assumptions: This routine does not check whether the associated 3292 * remote port/lun has already been opened. This should be 3293 * done by calling routines. Otherwise some status 3294 * may be presented by FSF 3295 */ 3296 int 3297 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 3298 { 3299 volatile struct qdio_buffer_element *sbale; 3300 unsigned long lock_flags; 3301 int retval = 0; 3302 3303 /* setup new FSF request */ 3304 retval = zfcp_fsf_req_create(erp_action->adapter, 3305 FSF_QTCB_CLOSE_LUN, 3306 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3307 erp_action->adapter->pool.fsf_req_erp, 3308 &lock_flags, &(erp_action->fsf_req)); 3309 if (retval < 0) { 3310 ZFCP_LOG_INFO("error: Could not create close unit request for " 3311 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3312 erp_action->unit->fcp_lun, 3313 erp_action->port->wwpn, 3314 zfcp_get_busid_by_adapter(erp_action->adapter)); 3315 goto out; 3316 } 3317 3318 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 3319 erp_action->fsf_req->sbal_curr, 0); 3320 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3321 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3322 3323 erp_action->fsf_req->qtcb->header.port_handle = 3324 erp_action->port->handle; 3325 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; 3326 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); 3327 erp_action->fsf_req->data = (unsigned long) erp_action->unit; 3328 erp_action->fsf_req->erp_action = erp_action; 3329 3330 /* start QDIO request for this FSF request */ 3331 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 3332 if (retval) { 3333 ZFCP_LOG_INFO("error: Could not send a close unit request for " 3334 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", 3335 erp_action->unit->fcp_lun, 3336 erp_action->port->wwpn, 3337 zfcp_get_busid_by_adapter(erp_action->adapter)); 3338 zfcp_fsf_req_free(erp_action->fsf_req); 3339 erp_action->fsf_req = NULL; 3340 goto out; 3341 } 3342 3343 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " 3344 "port 0x%016Lx, unit 0x%016Lx)\n", 3345 zfcp_get_busid_by_adapter(erp_action->adapter), 3346 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3347 out: 3348 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3349 lock_flags); 3350 return retval; 3351 } 3352 3353 /* 3354 * function: zfcp_fsf_close_unit_handler 3355 * 3356 * purpose: is called for finished Close LUN FSF command 3357 * 3358 * returns: 3359 */ 3360 static int 3361 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) 3362 { 3363 int retval = -EINVAL; 3364 struct zfcp_unit *unit; 3365 3366 unit = (struct zfcp_unit *) fsf_req->data; 3367 3368 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3369 /* don't change unit status in our bookkeeping */ 3370 goto skip_fsfstatus; 3371 } 3372 3373 /* evaluate FSF status in QTCB */ 3374 switch (fsf_req->qtcb->header.fsf_status) { 3375 3376 case FSF_PORT_HANDLE_NOT_VALID: 3377 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3378 "0x%016Lx on adapter %s invalid. This may " 3379 "happen in rare circumstances\n", 3380 unit->port->handle, 3381 unit->port->wwpn, 3382 zfcp_get_busid_by_unit(unit)); 3383 ZFCP_LOG_DEBUG("status qualifier:\n"); 3384 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3385 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3386 sizeof (union fsf_status_qual)); 3387 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3388 "fsf_s_phand_nv"); 3389 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3390 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3391 break; 3392 3393 case FSF_LUN_HANDLE_NOT_VALID: 3394 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " 3395 "0x%016Lx on port 0x%016Lx on adapter %s is " 3396 "invalid. This may happen occasionally.\n", 3397 unit->handle, 3398 unit->fcp_lun, 3399 unit->port->wwpn, 3400 zfcp_get_busid_by_unit(unit)); 3401 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 3402 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3403 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3404 sizeof (union fsf_status_qual)); 3405 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3406 "fsf_s_lhand_nv"); 3407 zfcp_erp_port_reopen(unit->port, 0); 3408 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3409 break; 3410 3411 case FSF_PORT_BOXED: 3412 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3413 "needs to be reopened\n", 3414 unit->port->wwpn, 3415 zfcp_get_busid_by_unit(unit)); 3416 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3417 zfcp_erp_port_boxed(unit->port); 3418 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3419 ZFCP_STATUS_FSFREQ_RETRY; 3420 break; 3421 3422 case FSF_ADAPTER_STATUS_AVAILABLE: 3423 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 3424 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3425 /* re-establish link to port */ 3426 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3427 "fsf_sq_ltest"); 3428 zfcp_test_link(unit->port); 3429 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3430 break; 3431 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3432 /* ERP strategy will escalate */ 3433 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3434 "fsf_sq_ulp"); 3435 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3436 break; 3437 default: 3438 ZFCP_LOG_NORMAL 3439 ("bug: Wrong status qualifier 0x%x arrived.\n", 3440 fsf_req->qtcb->header.fsf_status_qual.word[0]); 3441 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3442 "fsf_sq_inval:"); 3443 debug_exception( 3444 fsf_req->adapter->erp_dbf, 0, 3445 &fsf_req->qtcb->header.fsf_status_qual.word[0], 3446 sizeof (u32)); 3447 break; 3448 } 3449 break; 3450 3451 case FSF_GOOD: 3452 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " 3453 "closed, port handle 0x%x\n", 3454 unit->fcp_lun, 3455 unit->port->wwpn, 3456 zfcp_get_busid_by_unit(unit), 3457 unit->handle); 3458 /* mark unit as closed */ 3459 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3460 retval = 0; 3461 break; 3462 3463 default: 3464 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3465 "(debug info 0x%x)\n", 3466 fsf_req->qtcb->header.fsf_status); 3467 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3468 debug_exception(fsf_req->adapter->erp_dbf, 0, 3469 &fsf_req->qtcb->header.fsf_status, 3470 sizeof (u32)); 3471 break; 3472 } 3473 3474 skip_fsfstatus: 3475 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); 3476 return retval; 3477 } 3478 3479 /** 3480 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) 3481 * @adapter: adapter where scsi command is issued 3482 * @unit: unit where command is sent to 3483 * @scsi_cmnd: scsi command to be sent 3484 * @timer: timer to be started when request is initiated 3485 * @req_flags: flags for fsf_request 3486 */ 3487 int 3488 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, 3489 struct zfcp_unit *unit, 3490 struct scsi_cmnd * scsi_cmnd, 3491 struct timer_list *timer, int req_flags) 3492 { 3493 struct zfcp_fsf_req *fsf_req = NULL; 3494 struct fcp_cmnd_iu *fcp_cmnd_iu; 3495 unsigned int sbtype; 3496 unsigned long lock_flags; 3497 int real_bytes = 0; 3498 int retval = 0; 3499 int mask; 3500 3501 /* setup new FSF request */ 3502 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3503 adapter->pool.fsf_req_scsi, 3504 &lock_flags, &fsf_req); 3505 if (unlikely(retval < 0)) { 3506 ZFCP_LOG_DEBUG("error: Could not create FCP command request " 3507 "for unit 0x%016Lx on port 0x%016Lx on " 3508 "adapter %s\n", 3509 unit->fcp_lun, 3510 unit->port->wwpn, 3511 zfcp_get_busid_by_adapter(adapter)); 3512 goto failed_req_create; 3513 } 3514 3515 zfcp_unit_get(unit); 3516 fsf_req->unit = unit; 3517 3518 /* associate FSF request with SCSI request (for look up on abort) */ 3519 scsi_cmnd->host_scribble = (char *) fsf_req; 3520 3521 /* associate SCSI command with FSF request */ 3522 fsf_req->data = (unsigned long) scsi_cmnd; 3523 3524 /* set handles of unit and its parent port in QTCB */ 3525 fsf_req->qtcb->header.lun_handle = unit->handle; 3526 fsf_req->qtcb->header.port_handle = unit->port->handle; 3527 3528 /* FSF does not define the structure of the FCP_CMND IU */ 3529 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3530 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3531 3532 /* 3533 * set depending on data direction: 3534 * data direction bits in SBALE (SB Type) 3535 * data direction bits in QTCB 3536 * data direction bits in FCP_CMND IU 3537 */ 3538 switch (scsi_cmnd->sc_data_direction) { 3539 case DMA_NONE: 3540 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3541 /* 3542 * FIXME(qdio): 3543 * what is the correct type for commands 3544 * without 'real' data buffers? 3545 */ 3546 sbtype = SBAL_FLAGS0_TYPE_READ; 3547 break; 3548 case DMA_FROM_DEVICE: 3549 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; 3550 sbtype = SBAL_FLAGS0_TYPE_READ; 3551 fcp_cmnd_iu->rddata = 1; 3552 break; 3553 case DMA_TO_DEVICE: 3554 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; 3555 sbtype = SBAL_FLAGS0_TYPE_WRITE; 3556 fcp_cmnd_iu->wddata = 1; 3557 break; 3558 case DMA_BIDIRECTIONAL: 3559 default: 3560 /* 3561 * dummy, catch this condition earlier 3562 * in zfcp_scsi_queuecommand 3563 */ 3564 goto failed_scsi_cmnd; 3565 } 3566 3567 /* set FC service class in QTCB (3 per default) */ 3568 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; 3569 3570 /* set FCP_LUN in FCP_CMND IU in QTCB */ 3571 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3572 3573 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; 3574 3575 /* set task attributes in FCP_CMND IU in QTCB */ 3576 if (likely((scsi_cmnd->device->simple_tags) || 3577 (atomic_test_mask(mask, &unit->status)))) 3578 fcp_cmnd_iu->task_attribute = SIMPLE_Q; 3579 else 3580 fcp_cmnd_iu->task_attribute = UNTAGGED; 3581 3582 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ 3583 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { 3584 fcp_cmnd_iu->add_fcp_cdb_length 3585 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; 3586 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " 3587 "additional FCP_CDB length is 0x%x " 3588 "(shifted right 2 bits)\n", 3589 scsi_cmnd->cmd_len, 3590 fcp_cmnd_iu->add_fcp_cdb_length); 3591 } 3592 /* 3593 * copy SCSI CDB (including additional length, if any) to 3594 * FCP_CDB in FCP_CMND IU in QTCB 3595 */ 3596 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3597 3598 /* FCP CMND IU length in QTCB */ 3599 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3600 sizeof (struct fcp_cmnd_iu) + 3601 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); 3602 3603 /* generate SBALEs from data buffer */ 3604 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); 3605 if (unlikely(real_bytes < 0)) { 3606 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { 3607 ZFCP_LOG_DEBUG( 3608 "Data did not fit into available buffer(s), " 3609 "waiting for more...\n"); 3610 retval = -EIO; 3611 } else { 3612 ZFCP_LOG_NORMAL("error: No truncation implemented but " 3613 "required. Shutting down unit " 3614 "(adapter %s, port 0x%016Lx, " 3615 "unit 0x%016Lx)\n", 3616 zfcp_get_busid_by_unit(unit), 3617 unit->port->wwpn, 3618 unit->fcp_lun); 3619 zfcp_erp_unit_shutdown(unit, 0); 3620 retval = -EINVAL; 3621 } 3622 goto no_fit; 3623 } 3624 3625 /* set length of FCP data length in FCP_CMND IU in QTCB */ 3626 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); 3627 3628 ZFCP_LOG_DEBUG("Sending SCSI command:\n"); 3629 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3630 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3631 3632 /* 3633 * start QDIO request for this FSF request 3634 * covered by an SBALE) 3635 */ 3636 retval = zfcp_fsf_req_send(fsf_req, timer); 3637 if (unlikely(retval < 0)) { 3638 ZFCP_LOG_INFO("error: Could not send FCP command request " 3639 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 3640 zfcp_get_busid_by_adapter(adapter), 3641 unit->port->wwpn, 3642 unit->fcp_lun); 3643 goto send_failed; 3644 } 3645 3646 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " 3647 "port 0x%016Lx, unit 0x%016Lx)\n", 3648 zfcp_get_busid_by_adapter(adapter), 3649 unit->port->wwpn, 3650 unit->fcp_lun); 3651 goto success; 3652 3653 send_failed: 3654 no_fit: 3655 failed_scsi_cmnd: 3656 zfcp_unit_put(unit); 3657 zfcp_fsf_req_free(fsf_req); 3658 fsf_req = NULL; 3659 scsi_cmnd->host_scribble = NULL; 3660 success: 3661 failed_req_create: 3662 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3663 return retval; 3664 } 3665 3666 struct zfcp_fsf_req * 3667 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, 3668 struct zfcp_unit *unit, 3669 u8 tm_flags, int req_flags) 3670 { 3671 struct zfcp_fsf_req *fsf_req = NULL; 3672 int retval = 0; 3673 struct fcp_cmnd_iu *fcp_cmnd_iu; 3674 unsigned long lock_flags; 3675 volatile struct qdio_buffer_element *sbale; 3676 3677 /* setup new FSF request */ 3678 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3679 adapter->pool.fsf_req_scsi, 3680 &lock_flags, &fsf_req); 3681 if (retval < 0) { 3682 ZFCP_LOG_INFO("error: Could not create FCP command (task " 3683 "management) request for adapter %s, port " 3684 " 0x%016Lx, unit 0x%016Lx.\n", 3685 zfcp_get_busid_by_adapter(adapter), 3686 unit->port->wwpn, unit->fcp_lun); 3687 goto out; 3688 } 3689 3690 /* 3691 * Used to decide on proper handler in the return path, 3692 * could be either zfcp_fsf_send_fcp_command_task_handler or 3693 * zfcp_fsf_send_fcp_command_task_management_handler */ 3694 3695 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; 3696 3697 /* 3698 * hold a pointer to the unit being target of this 3699 * task management request 3700 */ 3701 fsf_req->data = (unsigned long) unit; 3702 3703 /* set FSF related fields in QTCB */ 3704 fsf_req->qtcb->header.lun_handle = unit->handle; 3705 fsf_req->qtcb->header.port_handle = unit->port->handle; 3706 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3707 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; 3708 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3709 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); 3710 3711 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3712 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; 3713 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3714 3715 /* set FCP related fields in FCP_CMND IU in QTCB */ 3716 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3717 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3718 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3719 fcp_cmnd_iu->task_management_flags = tm_flags; 3720 3721 /* start QDIO request for this FSF request */ 3722 zfcp_fsf_start_scsi_er_timer(adapter); 3723 retval = zfcp_fsf_req_send(fsf_req, NULL); 3724 if (retval) { 3725 del_timer(&adapter->scsi_er_timer); 3726 ZFCP_LOG_INFO("error: Could not send an FCP-command (task " 3727 "management) on adapter %s, port 0x%016Lx for " 3728 "unit LUN 0x%016Lx\n", 3729 zfcp_get_busid_by_adapter(adapter), 3730 unit->port->wwpn, 3731 unit->fcp_lun); 3732 zfcp_fsf_req_free(fsf_req); 3733 fsf_req = NULL; 3734 goto out; 3735 } 3736 3737 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " 3738 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " 3739 "tm_flags=0x%x)\n", 3740 zfcp_get_busid_by_adapter(adapter), 3741 unit->port->wwpn, 3742 unit->fcp_lun, 3743 tm_flags); 3744 out: 3745 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3746 return fsf_req; 3747 } 3748 3749 /* 3750 * function: zfcp_fsf_send_fcp_command_handler 3751 * 3752 * purpose: is called for finished Send FCP Command 3753 * 3754 * returns: 3755 */ 3756 static int 3757 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 3758 { 3759 int retval = -EINVAL; 3760 struct zfcp_unit *unit; 3761 struct fsf_qtcb_header *header; 3762 u16 subtable, rule, counter; 3763 3764 header = &fsf_req->qtcb->header; 3765 3766 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) 3767 unit = (struct zfcp_unit *) fsf_req->data; 3768 else 3769 unit = fsf_req->unit; 3770 3771 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 3772 /* go directly to calls of special handlers */ 3773 goto skip_fsfstatus; 3774 } 3775 3776 /* evaluate FSF status in QTCB */ 3777 switch (header->fsf_status) { 3778 3779 case FSF_PORT_HANDLE_NOT_VALID: 3780 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3781 "0x%016Lx on adapter %s invalid\n", 3782 unit->port->handle, 3783 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3784 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3785 (char *) &header->fsf_status_qual, 3786 sizeof (union fsf_status_qual)); 3787 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3788 "fsf_s_phand_nv"); 3789 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3790 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3791 break; 3792 3793 case FSF_LUN_HANDLE_NOT_VALID: 3794 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " 3795 "0x%016Lx on port 0x%016Lx on adapter %s is " 3796 "invalid. This may happen occasionally.\n", 3797 unit->handle, 3798 unit->fcp_lun, 3799 unit->port->wwpn, 3800 zfcp_get_busid_by_unit(unit)); 3801 ZFCP_LOG_NORMAL("Status qualifier data:\n"); 3802 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3803 (char *) &header->fsf_status_qual, 3804 sizeof (union fsf_status_qual)); 3805 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3806 "fsf_s_uhand_nv"); 3807 zfcp_erp_port_reopen(unit->port, 0); 3808 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3809 break; 3810 3811 case FSF_HANDLE_MISMATCH: 3812 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " 3813 "unexpectedly. (adapter %s, port 0x%016Lx, " 3814 "unit 0x%016Lx)\n", 3815 unit->port->handle, 3816 zfcp_get_busid_by_unit(unit), 3817 unit->port->wwpn, 3818 unit->fcp_lun); 3819 ZFCP_LOG_NORMAL("status qualifier:\n"); 3820 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3821 (char *) &header->fsf_status_qual, 3822 sizeof (union fsf_status_qual)); 3823 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3824 "fsf_s_hand_mis"); 3825 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3826 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3827 break; 3828 3829 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 3830 ZFCP_LOG_INFO("error: adapter %s does not support fc " 3831 "class %d.\n", 3832 zfcp_get_busid_by_unit(unit), 3833 ZFCP_FC_SERVICE_CLASS_DEFAULT); 3834 /* stop operation for this adapter */ 3835 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 3836 "fsf_s_class_nsup"); 3837 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3838 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3839 break; 3840 3841 case FSF_FCPLUN_NOT_VALID: 3842 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " 3843 "adapter %s does not have correct unit " 3844 "handle 0x%x\n", 3845 unit->fcp_lun, 3846 unit->port->wwpn, 3847 zfcp_get_busid_by_unit(unit), 3848 unit->handle); 3849 ZFCP_LOG_DEBUG("status qualifier:\n"); 3850 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3851 (char *) &header->fsf_status_qual, 3852 sizeof (union fsf_status_qual)); 3853 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3854 "fsf_s_fcp_lun_nv"); 3855 zfcp_erp_port_reopen(unit->port, 0); 3856 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3857 break; 3858 3859 case FSF_ACCESS_DENIED: 3860 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " 3861 "unit 0x%016Lx on port 0x%016Lx on " 3862 "adapter %s\n", unit->fcp_lun, unit->port->wwpn, 3863 zfcp_get_busid_by_unit(unit)); 3864 for (counter = 0; counter < 2; counter++) { 3865 subtable = header->fsf_status_qual.halfword[counter * 2]; 3866 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3867 switch (subtable) { 3868 case FSF_SQ_CFDC_SUBTABLE_OS: 3869 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3870 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3871 case FSF_SQ_CFDC_SUBTABLE_LUN: 3872 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3873 zfcp_act_subtable_type[subtable], rule); 3874 break; 3875 } 3876 } 3877 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 3878 zfcp_erp_unit_access_denied(unit); 3879 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3880 break; 3881 3882 case FSF_DIRECTION_INDICATOR_NOT_VALID: 3883 ZFCP_LOG_INFO("bug: Invalid data direction given for unit " 3884 "0x%016Lx on port 0x%016Lx on adapter %s " 3885 "(debug info %d)\n", 3886 unit->fcp_lun, 3887 unit->port->wwpn, 3888 zfcp_get_busid_by_unit(unit), 3889 fsf_req->qtcb->bottom.io.data_direction); 3890 /* stop operation for this adapter */ 3891 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3892 "fsf_s_dir_ind_nv"); 3893 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3894 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3895 break; 3896 3897 case FSF_CMND_LENGTH_NOT_VALID: 3898 ZFCP_LOG_NORMAL 3899 ("bug: An invalid control-data-block length field " 3900 "was found in a command for unit 0x%016Lx on port " 3901 "0x%016Lx on adapter %s " "(debug info %d)\n", 3902 unit->fcp_lun, unit->port->wwpn, 3903 zfcp_get_busid_by_unit(unit), 3904 fsf_req->qtcb->bottom.io.fcp_cmnd_length); 3905 /* stop operation for this adapter */ 3906 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3907 "fsf_s_cmd_len_nv"); 3908 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3909 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3910 break; 3911 3912 case FSF_PORT_BOXED: 3913 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3914 "needs to be reopened\n", 3915 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3916 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3917 zfcp_erp_port_boxed(unit->port); 3918 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3919 ZFCP_STATUS_FSFREQ_RETRY; 3920 break; 3921 3922 case FSF_LUN_BOXED: 3923 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " 3924 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", 3925 zfcp_get_busid_by_unit(unit), 3926 unit->port->wwpn, unit->fcp_lun); 3927 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 3928 zfcp_erp_unit_boxed(unit); 3929 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 3930 | ZFCP_STATUS_FSFREQ_RETRY; 3931 break; 3932 3933 case FSF_ADAPTER_STATUS_AVAILABLE: 3934 switch (header->fsf_status_qual.word[0]) { 3935 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3936 /* re-establish link to port */ 3937 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3938 "fsf_sq_ltest"); 3939 zfcp_test_link(unit->port); 3940 break; 3941 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3942 /* FIXME(hw) need proper specs for proper action */ 3943 /* let scsi stack deal with retries and escalation */ 3944 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3945 "fsf_sq_ulp"); 3946 break; 3947 default: 3948 ZFCP_LOG_NORMAL 3949 ("Unknown status qualifier 0x%x arrived.\n", 3950 header->fsf_status_qual.word[0]); 3951 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3952 "fsf_sq_inval:"); 3953 debug_exception(fsf_req->adapter->erp_dbf, 0, 3954 &header->fsf_status_qual.word[0], 3955 sizeof(u32)); 3956 break; 3957 } 3958 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3959 break; 3960 3961 case FSF_GOOD: 3962 break; 3963 3964 case FSF_FCP_RSP_AVAILABLE: 3965 break; 3966 3967 default: 3968 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3969 debug_exception(fsf_req->adapter->erp_dbf, 0, 3970 &header->fsf_status, sizeof(u32)); 3971 break; 3972 } 3973 3974 skip_fsfstatus: 3975 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { 3976 retval = 3977 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); 3978 } else { 3979 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); 3980 fsf_req->unit = NULL; 3981 zfcp_unit_put(unit); 3982 } 3983 return retval; 3984 } 3985 3986 /* 3987 * function: zfcp_fsf_send_fcp_command_task_handler 3988 * 3989 * purpose: evaluates FCP_RSP IU 3990 * 3991 * returns: 3992 */ 3993 static int 3994 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) 3995 { 3996 int retval = 0; 3997 struct scsi_cmnd *scpnt; 3998 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 3999 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4000 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) 4001 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 4002 u32 sns_len; 4003 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4004 unsigned long flags; 4005 struct zfcp_unit *unit = fsf_req->unit; 4006 4007 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); 4008 scpnt = (struct scsi_cmnd *) fsf_req->data; 4009 if (unlikely(!scpnt)) { 4010 ZFCP_LOG_DEBUG 4011 ("Command with fsf_req %p is not associated to " 4012 "a scsi command anymore. Aborted?\n", fsf_req); 4013 goto out; 4014 } 4015 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { 4016 /* FIXME: (design) mid-layer should handle DID_ABORT like 4017 * DID_SOFT_ERROR by retrying the request for devices 4018 * that allow retries. 4019 */ 4020 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); 4021 set_host_byte(&scpnt->result, DID_SOFT_ERROR); 4022 set_driver_byte(&scpnt->result, SUGGEST_RETRY); 4023 goto skip_fsfstatus; 4024 } 4025 4026 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 4027 ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); 4028 set_host_byte(&scpnt->result, DID_ERROR); 4029 goto skip_fsfstatus; 4030 } 4031 4032 /* set message byte of result in SCSI command */ 4033 scpnt->result |= COMMAND_COMPLETE << 8; 4034 4035 /* 4036 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte 4037 * of result in SCSI command 4038 */ 4039 scpnt->result |= fcp_rsp_iu->scsi_status; 4040 if (unlikely(fcp_rsp_iu->scsi_status)) { 4041 /* DEBUG */ 4042 ZFCP_LOG_DEBUG("status for SCSI Command:\n"); 4043 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4044 scpnt->cmnd, scpnt->cmd_len); 4045 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", 4046 fcp_rsp_iu->scsi_status); 4047 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4048 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); 4049 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4050 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), 4051 fcp_rsp_iu->fcp_sns_len); 4052 } 4053 4054 /* check FCP_RSP_INFO */ 4055 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { 4056 ZFCP_LOG_DEBUG("rsp_len is valid\n"); 4057 switch (fcp_rsp_info[3]) { 4058 case RSP_CODE_GOOD: 4059 /* ok, continue */ 4060 ZFCP_LOG_TRACE("no failure or Task Management " 4061 "Function complete\n"); 4062 set_host_byte(&scpnt->result, DID_OK); 4063 break; 4064 case RSP_CODE_LENGTH_MISMATCH: 4065 /* hardware bug */ 4066 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4067 "that the fibrechannel protocol data " 4068 "length differs from the burst length. " 4069 "The problem occured on unit 0x%016Lx " 4070 "on port 0x%016Lx on adapter %s", 4071 unit->fcp_lun, 4072 unit->port->wwpn, 4073 zfcp_get_busid_by_unit(unit)); 4074 /* dump SCSI CDB as prepared by zfcp */ 4075 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4076 (char *) &fsf_req->qtcb-> 4077 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4078 set_host_byte(&scpnt->result, DID_ERROR); 4079 goto skip_fsfstatus; 4080 case RSP_CODE_FIELD_INVALID: 4081 /* driver or hardware bug */ 4082 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4083 "that the fibrechannel protocol data " 4084 "fields were incorrectly set up. " 4085 "The problem occured on the unit " 4086 "0x%016Lx on port 0x%016Lx on " 4087 "adapter %s", 4088 unit->fcp_lun, 4089 unit->port->wwpn, 4090 zfcp_get_busid_by_unit(unit)); 4091 /* dump SCSI CDB as prepared by zfcp */ 4092 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4093 (char *) &fsf_req->qtcb-> 4094 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4095 set_host_byte(&scpnt->result, DID_ERROR); 4096 goto skip_fsfstatus; 4097 case RSP_CODE_RO_MISMATCH: 4098 /* hardware bug */ 4099 ZFCP_LOG_NORMAL("bug: The FCP response code indicates " 4100 "that conflicting values for the " 4101 "fibrechannel payload offset from the " 4102 "header were found. " 4103 "The problem occured on unit 0x%016Lx " 4104 "on port 0x%016Lx on adapter %s.\n", 4105 unit->fcp_lun, 4106 unit->port->wwpn, 4107 zfcp_get_busid_by_unit(unit)); 4108 /* dump SCSI CDB as prepared by zfcp */ 4109 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4110 (char *) &fsf_req->qtcb-> 4111 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4112 set_host_byte(&scpnt->result, DID_ERROR); 4113 goto skip_fsfstatus; 4114 default: 4115 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4116 "code was detected for a command. " 4117 "The problem occured on the unit " 4118 "0x%016Lx on port 0x%016Lx on " 4119 "adapter %s (debug info 0x%x)\n", 4120 unit->fcp_lun, 4121 unit->port->wwpn, 4122 zfcp_get_busid_by_unit(unit), 4123 fcp_rsp_info[3]); 4124 /* dump SCSI CDB as prepared by zfcp */ 4125 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4126 (char *) &fsf_req->qtcb-> 4127 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4128 set_host_byte(&scpnt->result, DID_ERROR); 4129 goto skip_fsfstatus; 4130 } 4131 } 4132 4133 /* check for sense data */ 4134 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { 4135 sns_len = FSF_FCP_RSP_SIZE - 4136 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; 4137 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", 4138 sns_len); 4139 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); 4140 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", 4141 SCSI_SENSE_BUFFERSIZE); 4142 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); 4143 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", 4144 scpnt->result); 4145 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4146 (void *) &scpnt->cmnd, scpnt->cmd_len); 4147 4148 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", 4149 fcp_rsp_iu->fcp_sns_len); 4150 memcpy(&scpnt->sense_buffer, 4151 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); 4152 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4153 (void *) &scpnt->sense_buffer, sns_len); 4154 } 4155 4156 /* check for overrun */ 4157 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { 4158 ZFCP_LOG_INFO("A data overrun 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 4169 /* check for underrun */ 4170 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { 4171 ZFCP_LOG_INFO("A data underrun was detected for a command. " 4172 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4173 "The response data length is " 4174 "%d, the original length was %d.\n", 4175 unit->fcp_lun, 4176 unit->port->wwpn, 4177 zfcp_get_busid_by_unit(unit), 4178 fcp_rsp_iu->fcp_resid, 4179 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4180 4181 scpnt->resid = fcp_rsp_iu->fcp_resid; 4182 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) 4183 set_host_byte(&scpnt->result, DID_ERROR); 4184 } 4185 4186 skip_fsfstatus: 4187 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); 4188 4189 if (scpnt->result != 0) 4190 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); 4191 else if (scpnt->retries > 0) 4192 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); 4193 else 4194 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req); 4195 4196 /* cleanup pointer (need this especially for abort) */ 4197 scpnt->host_scribble = NULL; 4198 4199 /* always call back */ 4200 (scpnt->scsi_done) (scpnt); 4201 4202 /* 4203 * We must hold this lock until scsi_done has been called. 4204 * Otherwise we may call scsi_done after abort regarding this 4205 * command has completed. 4206 * Note: scsi_done must not block! 4207 */ 4208 out: 4209 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); 4210 return retval; 4211 } 4212 4213 /* 4214 * function: zfcp_fsf_send_fcp_command_task_management_handler 4215 * 4216 * purpose: evaluates FCP_RSP IU 4217 * 4218 * returns: 4219 */ 4220 static int 4221 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) 4222 { 4223 int retval = 0; 4224 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4225 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4226 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4227 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data; 4228 4229 del_timer(&fsf_req->adapter->scsi_er_timer); 4230 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4231 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4232 goto skip_fsfstatus; 4233 } 4234 4235 /* check FCP_RSP_INFO */ 4236 switch (fcp_rsp_info[3]) { 4237 case RSP_CODE_GOOD: 4238 /* ok, continue */ 4239 ZFCP_LOG_DEBUG("no failure or Task Management " 4240 "Function complete\n"); 4241 break; 4242 case RSP_CODE_TASKMAN_UNSUPP: 4243 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4244 "is not supported on the target device " 4245 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", 4246 unit->fcp_lun, 4247 unit->port->wwpn, 4248 zfcp_get_busid_by_unit(unit)); 4249 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; 4250 break; 4251 case RSP_CODE_TASKMAN_FAILED: 4252 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4253 "failed to complete successfully. " 4254 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", 4255 unit->fcp_lun, 4256 unit->port->wwpn, 4257 zfcp_get_busid_by_unit(unit)); 4258 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4259 break; 4260 default: 4261 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4262 "code was detected for a command. " 4263 "unit 0x%016Lx, port 0x%016Lx, adapter %s " 4264 "(debug info 0x%x)\n", 4265 unit->fcp_lun, 4266 unit->port->wwpn, 4267 zfcp_get_busid_by_unit(unit), 4268 fcp_rsp_info[3]); 4269 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4270 } 4271 4272 skip_fsfstatus: 4273 return retval; 4274 } 4275 4276 4277 /* 4278 * function: zfcp_fsf_control_file 4279 * 4280 * purpose: Initiator of the control file upload/download FSF requests 4281 * 4282 * returns: 0 - FSF request is successfuly created and queued 4283 * -EOPNOTSUPP - The FCP adapter does not have Control File support 4284 * -EINVAL - Invalid direction specified 4285 * -ENOMEM - Insufficient memory 4286 * -EPERM - Cannot create FSF request or place it in QDIO queue 4287 */ 4288 int 4289 zfcp_fsf_control_file(struct zfcp_adapter *adapter, 4290 struct zfcp_fsf_req **fsf_req_ptr, 4291 u32 fsf_command, 4292 u32 option, 4293 struct zfcp_sg_list *sg_list) 4294 { 4295 struct zfcp_fsf_req *fsf_req; 4296 struct fsf_qtcb_bottom_support *bottom; 4297 volatile struct qdio_buffer_element *sbale; 4298 struct timer_list *timer; 4299 unsigned long lock_flags; 4300 int req_flags = 0; 4301 int direction; 4302 int retval = 0; 4303 4304 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) { 4305 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", 4306 zfcp_get_busid_by_adapter(adapter)); 4307 retval = -EOPNOTSUPP; 4308 goto out; 4309 } 4310 4311 switch (fsf_command) { 4312 4313 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 4314 direction = SBAL_FLAGS0_TYPE_WRITE; 4315 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && 4316 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) 4317 req_flags = ZFCP_WAIT_FOR_SBAL; 4318 break; 4319 4320 case FSF_QTCB_UPLOAD_CONTROL_FILE: 4321 direction = SBAL_FLAGS0_TYPE_READ; 4322 break; 4323 4324 default: 4325 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); 4326 retval = -EINVAL; 4327 goto out; 4328 } 4329 4330 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); 4331 if (!timer) { 4332 retval = -ENOMEM; 4333 goto out; 4334 } 4335 4336 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, 4337 NULL, &lock_flags, &fsf_req); 4338 if (retval < 0) { 4339 ZFCP_LOG_INFO("error: Could not create FSF request for the " 4340 "adapter %s\n", 4341 zfcp_get_busid_by_adapter(adapter)); 4342 retval = -EPERM; 4343 goto unlock_queue_lock; 4344 } 4345 4346 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4347 sbale[0].flags |= direction; 4348 4349 bottom = &fsf_req->qtcb->bottom.support; 4350 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; 4351 bottom->option = option; 4352 4353 if (sg_list->count > 0) { 4354 int bytes; 4355 4356 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, 4357 sg_list->sg, sg_list->count, 4358 ZFCP_MAX_SBALS_PER_REQ); 4359 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { 4360 ZFCP_LOG_INFO( 4361 "error: Could not create sufficient number of " 4362 "SBALS for an FSF request to the adapter %s\n", 4363 zfcp_get_busid_by_adapter(adapter)); 4364 retval = -ENOMEM; 4365 goto free_fsf_req; 4366 } 4367 } else 4368 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 4369 4370 init_timer(timer); 4371 timer->function = zfcp_fsf_request_timeout_handler; 4372 timer->data = (unsigned long) adapter; 4373 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; 4374 4375 retval = zfcp_fsf_req_send(fsf_req, timer); 4376 if (retval < 0) { 4377 ZFCP_LOG_INFO("initiation of cfdc up/download failed" 4378 "(adapter %s)\n", 4379 zfcp_get_busid_by_adapter(adapter)); 4380 retval = -EPERM; 4381 goto free_fsf_req; 4382 } 4383 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4384 4385 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " 4386 "adapter %s\n", 4387 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? 4388 "download" : "upload", 4389 zfcp_get_busid_by_adapter(adapter)); 4390 4391 wait_event(fsf_req->completion_wq, 4392 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4393 4394 *fsf_req_ptr = fsf_req; 4395 del_timer_sync(timer); 4396 goto free_timer; 4397 4398 free_fsf_req: 4399 zfcp_fsf_req_free(fsf_req); 4400 unlock_queue_lock: 4401 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4402 free_timer: 4403 kfree(timer); 4404 out: 4405 return retval; 4406 } 4407 4408 4409 /* 4410 * function: zfcp_fsf_control_file_handler 4411 * 4412 * purpose: Handler of the control file upload/download FSF requests 4413 * 4414 * returns: 0 - FSF request successfuly processed 4415 * -EAGAIN - Operation has to be repeated because of a temporary problem 4416 * -EACCES - There is no permission to execute an operation 4417 * -EPERM - The control file is not in a right format 4418 * -EIO - There is a problem with the FCP adapter 4419 * -EINVAL - Invalid operation 4420 * -EFAULT - User space memory I/O operation fault 4421 */ 4422 static int 4423 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) 4424 { 4425 struct zfcp_adapter *adapter = fsf_req->adapter; 4426 struct fsf_qtcb_header *header = &fsf_req->qtcb->header; 4427 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; 4428 int retval = 0; 4429 4430 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4431 retval = -EINVAL; 4432 goto skip_fsfstatus; 4433 } 4434 4435 switch (header->fsf_status) { 4436 4437 case FSF_GOOD: 4438 ZFCP_LOG_NORMAL( 4439 "The FSF request has been successfully completed " 4440 "on the adapter %s\n", 4441 zfcp_get_busid_by_adapter(adapter)); 4442 break; 4443 4444 case FSF_OPERATION_PARTIALLY_SUCCESSFUL: 4445 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { 4446 switch (header->fsf_status_qual.word[0]) { 4447 4448 case FSF_SQ_CFDC_HARDENED_ON_SE: 4449 ZFCP_LOG_NORMAL( 4450 "CFDC on the adapter %s has being " 4451 "hardened on primary and secondary SE\n", 4452 zfcp_get_busid_by_adapter(adapter)); 4453 break; 4454 4455 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: 4456 ZFCP_LOG_NORMAL( 4457 "CFDC of the adapter %s could not " 4458 "be saved on the SE\n", 4459 zfcp_get_busid_by_adapter(adapter)); 4460 break; 4461 4462 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: 4463 ZFCP_LOG_NORMAL( 4464 "CFDC of the adapter %s could not " 4465 "be copied to the secondary SE\n", 4466 zfcp_get_busid_by_adapter(adapter)); 4467 break; 4468 4469 default: 4470 ZFCP_LOG_NORMAL( 4471 "CFDC could not be hardened " 4472 "on the adapter %s\n", 4473 zfcp_get_busid_by_adapter(adapter)); 4474 } 4475 } 4476 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4477 retval = -EAGAIN; 4478 break; 4479 4480 case FSF_AUTHORIZATION_FAILURE: 4481 ZFCP_LOG_NORMAL( 4482 "Adapter %s does not accept privileged commands\n", 4483 zfcp_get_busid_by_adapter(adapter)); 4484 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4485 retval = -EACCES; 4486 break; 4487 4488 case FSF_CFDC_ERROR_DETECTED: 4489 ZFCP_LOG_NORMAL( 4490 "Error at position %d in the CFDC, " 4491 "CFDC is discarded by the adapter %s\n", 4492 header->fsf_status_qual.word[0], 4493 zfcp_get_busid_by_adapter(adapter)); 4494 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4495 retval = -EPERM; 4496 break; 4497 4498 case FSF_CONTROL_FILE_UPDATE_ERROR: 4499 ZFCP_LOG_NORMAL( 4500 "Adapter %s cannot harden the control file, " 4501 "file is discarded\n", 4502 zfcp_get_busid_by_adapter(adapter)); 4503 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4504 retval = -EIO; 4505 break; 4506 4507 case FSF_CONTROL_FILE_TOO_LARGE: 4508 ZFCP_LOG_NORMAL( 4509 "Control file is too large, file is discarded " 4510 "by the adapter %s\n", 4511 zfcp_get_busid_by_adapter(adapter)); 4512 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4513 retval = -EIO; 4514 break; 4515 4516 case FSF_ACCESS_CONFLICT_DETECTED: 4517 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4518 ZFCP_LOG_NORMAL( 4519 "CFDC has been discarded by the adapter %s, " 4520 "because activation would impact " 4521 "%d active connection(s)\n", 4522 zfcp_get_busid_by_adapter(adapter), 4523 header->fsf_status_qual.word[0]); 4524 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4525 retval = -EIO; 4526 break; 4527 4528 case FSF_CONFLICTS_OVERRULED: 4529 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4530 ZFCP_LOG_NORMAL( 4531 "CFDC has been activated on the adapter %s, " 4532 "but activation has impacted " 4533 "%d active connection(s)\n", 4534 zfcp_get_busid_by_adapter(adapter), 4535 header->fsf_status_qual.word[0]); 4536 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4537 retval = -EIO; 4538 break; 4539 4540 case FSF_UNKNOWN_OP_SUBTYPE: 4541 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " 4542 "op_subtype=0x%x)\n", 4543 zfcp_get_busid_by_adapter(adapter), 4544 bottom->operation_subtype); 4545 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4546 retval = -EINVAL; 4547 break; 4548 4549 case FSF_INVALID_COMMAND_OPTION: 4550 ZFCP_LOG_NORMAL( 4551 "Invalid option 0x%x has been specified " 4552 "in QTCB bottom sent to the adapter %s\n", 4553 bottom->option, 4554 zfcp_get_busid_by_adapter(adapter)); 4555 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4556 retval = -EINVAL; 4557 break; 4558 4559 default: 4560 ZFCP_LOG_NORMAL( 4561 "bug: An unknown/unexpected FSF status 0x%08x " 4562 "was presented on the adapter %s\n", 4563 header->fsf_status, 4564 zfcp_get_busid_by_adapter(adapter)); 4565 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); 4566 debug_exception(fsf_req->adapter->erp_dbf, 0, 4567 &header->fsf_status_qual.word[0], sizeof(u32)); 4568 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4569 retval = -EINVAL; 4570 break; 4571 } 4572 4573 skip_fsfstatus: 4574 return retval; 4575 } 4576 4577 static inline int 4578 zfcp_fsf_req_sbal_check(unsigned long *flags, 4579 struct zfcp_qdio_queue *queue, int needed) 4580 { 4581 write_lock_irqsave(&queue->queue_lock, *flags); 4582 if (likely(atomic_read(&queue->free_count) >= needed)) 4583 return 1; 4584 write_unlock_irqrestore(&queue->queue_lock, *flags); 4585 return 0; 4586 } 4587 4588 /* 4589 * set qtcb pointer in fsf_req and initialize QTCB 4590 */ 4591 static inline void 4592 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) 4593 { 4594 if (likely(fsf_req->qtcb != NULL)) { 4595 fsf_req->qtcb->prefix.req_seq_no = fsf_req->adapter->fsf_req_seq_no; 4596 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req; 4597 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; 4598 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_req->fsf_command]; 4599 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; 4600 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req; 4601 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; 4602 } 4603 } 4604 4605 /** 4606 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue 4607 * @adapter: adapter for which request queue is examined 4608 * @req_flags: flags indicating whether to wait for needed SBAL or not 4609 * @lock_flags: lock_flags if queue_lock is taken 4610 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS 4611 * Locks: lock adapter->request_queue->queue_lock on success 4612 */ 4613 static int 4614 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, 4615 unsigned long *lock_flags) 4616 { 4617 long ret; 4618 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4619 4620 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { 4621 ret = wait_event_interruptible_timeout(adapter->request_wq, 4622 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), 4623 ZFCP_SBAL_TIMEOUT); 4624 if (ret < 0) 4625 return ret; 4626 if (!ret) 4627 return -EIO; 4628 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) 4629 return -EIO; 4630 4631 return 0; 4632 } 4633 4634 /* 4635 * function: zfcp_fsf_req_create 4636 * 4637 * purpose: create an FSF request at the specified adapter and 4638 * setup common fields 4639 * 4640 * returns: -ENOMEM if there was insufficient memory for a request 4641 * -EIO if no qdio buffers could be allocate to the request 4642 * -EINVAL/-EPERM on bug conditions in req_dequeue 4643 * 0 in success 4644 * 4645 * note: The created request is returned by reference. 4646 * 4647 * locks: lock of concerned request queue must not be held, 4648 * but is held on completion (write, irqsave) 4649 */ 4650 int 4651 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, 4652 mempool_t *pool, unsigned long *lock_flags, 4653 struct zfcp_fsf_req **fsf_req_p) 4654 { 4655 volatile struct qdio_buffer_element *sbale; 4656 struct zfcp_fsf_req *fsf_req = NULL; 4657 int ret = 0; 4658 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4659 4660 /* allocate new FSF request */ 4661 fsf_req = zfcp_fsf_req_alloc(pool, req_flags); 4662 if (unlikely(NULL == fsf_req)) { 4663 ZFCP_LOG_DEBUG("error: Could not put an FSF request into" 4664 "the outbound (send) queue.\n"); 4665 ret = -ENOMEM; 4666 goto failed_fsf_req; 4667 } 4668 4669 fsf_req->adapter = adapter; 4670 fsf_req->fsf_command = fsf_cmd; 4671 4672 zfcp_fsf_req_qtcb_init(fsf_req); 4673 4674 /* initialize waitqueue which may be used to wait on 4675 this request completion */ 4676 init_waitqueue_head(&fsf_req->completion_wq); 4677 4678 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); 4679 if(ret < 0) { 4680 goto failed_sbals; 4681 } 4682 4683 /* 4684 * We hold queue_lock here. Check if QDIOUP is set and let request fail 4685 * if it is not set (see also *_open_qdio and *_close_qdio). 4686 */ 4687 4688 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { 4689 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); 4690 ret = -EIO; 4691 goto failed_sbals; 4692 } 4693 4694 if (fsf_req->qtcb) { 4695 fsf_req->seq_no = adapter->fsf_req_seq_no; 4696 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 4697 } 4698 fsf_req->sbal_number = 1; 4699 fsf_req->sbal_first = req_queue->free_index; 4700 fsf_req->sbal_curr = req_queue->free_index; 4701 fsf_req->sbale_curr = 1; 4702 4703 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { 4704 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 4705 } 4706 4707 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4708 4709 /* setup common SBALE fields */ 4710 sbale[0].addr = fsf_req; 4711 sbale[0].flags |= SBAL_FLAGS0_COMMAND; 4712 if (likely(fsf_req->qtcb != NULL)) { 4713 sbale[1].addr = (void *) fsf_req->qtcb; 4714 sbale[1].length = sizeof(struct fsf_qtcb); 4715 } 4716 4717 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", 4718 fsf_req->sbal_number, fsf_req->sbal_first); 4719 4720 goto success; 4721 4722 failed_sbals: 4723 /* dequeue new FSF request previously enqueued */ 4724 zfcp_fsf_req_free(fsf_req); 4725 fsf_req = NULL; 4726 4727 failed_fsf_req: 4728 write_lock_irqsave(&req_queue->queue_lock, *lock_flags); 4729 success: 4730 *fsf_req_p = fsf_req; 4731 return ret; 4732 } 4733 4734 /* 4735 * function: zfcp_fsf_req_send 4736 * 4737 * purpose: start transfer of FSF request via QDIO 4738 * 4739 * returns: 0 - request transfer succesfully started 4740 * !0 - start of request transfer failed 4741 */ 4742 static int 4743 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) 4744 { 4745 struct zfcp_adapter *adapter; 4746 struct zfcp_qdio_queue *req_queue; 4747 volatile struct qdio_buffer_element *sbale; 4748 int inc_seq_no; 4749 int new_distance_from_int; 4750 unsigned long flags; 4751 int retval = 0; 4752 4753 adapter = fsf_req->adapter; 4754 req_queue = &adapter->request_queue, 4755 4756 4757 /* FIXME(debug): remove it later */ 4758 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); 4759 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); 4760 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); 4761 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, 4762 sbale[1].length); 4763 4764 /* put allocated FSF request at list tail */ 4765 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); 4766 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head); 4767 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 4768 4769 inc_seq_no = (fsf_req->qtcb != NULL); 4770 4771 /* figure out expiration time of timeout and start timeout */ 4772 if (unlikely(timer)) { 4773 timer->expires += jiffies; 4774 add_timer(timer); 4775 } 4776 4777 ZFCP_LOG_TRACE("request queue of adapter %s: " 4778 "next free SBAL is %i, %i free SBALs\n", 4779 zfcp_get_busid_by_adapter(adapter), 4780 req_queue->free_index, 4781 atomic_read(&req_queue->free_count)); 4782 4783 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " 4784 "index_in_queue=%i, count=%i, buffers=%p\n", 4785 zfcp_get_busid_by_adapter(adapter), 4786 QDIO_FLAG_SYNC_OUTPUT, 4787 0, fsf_req->sbal_first, fsf_req->sbal_number, 4788 &req_queue->buffer[fsf_req->sbal_first]); 4789 4790 /* 4791 * adjust the number of free SBALs in request queue as well as 4792 * position of first one 4793 */ 4794 atomic_sub(fsf_req->sbal_number, &req_queue->free_count); 4795 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); 4796 req_queue->free_index += fsf_req->sbal_number; /* increase */ 4797 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ 4798 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); 4799 4800 fsf_req->issued = get_clock(); 4801 4802 retval = do_QDIO(adapter->ccw_device, 4803 QDIO_FLAG_SYNC_OUTPUT, 4804 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); 4805 4806 if (unlikely(retval)) { 4807 /* Queues are down..... */ 4808 retval = -EIO; 4809 /* 4810 * FIXME(potential race): 4811 * timer might be expired (absolutely unlikely) 4812 */ 4813 if (timer) 4814 del_timer(timer); 4815 spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); 4816 list_del(&fsf_req->list); 4817 spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 4818 /* 4819 * adjust the number of free SBALs in request queue as well as 4820 * position of first one 4821 */ 4822 zfcp_qdio_zero_sbals(req_queue->buffer, 4823 fsf_req->sbal_first, fsf_req->sbal_number); 4824 atomic_add(fsf_req->sbal_number, &req_queue->free_count); 4825 req_queue->free_index -= fsf_req->sbal_number; /* increase */ 4826 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; 4827 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ 4828 ZFCP_LOG_DEBUG 4829 ("error: do_QDIO failed. Buffers could not be enqueued " 4830 "to request queue.\n"); 4831 } else { 4832 req_queue->distance_from_int = new_distance_from_int; 4833 /* 4834 * increase FSF sequence counter - 4835 * this must only be done for request successfully enqueued to 4836 * QDIO this rejected requests may be cleaned up by calling 4837 * routines resulting in missing sequence counter values 4838 * otherwise, 4839 */ 4840 4841 /* Don't increase for unsolicited status */ 4842 if (inc_seq_no) 4843 adapter->fsf_req_seq_no++; 4844 4845 /* count FSF requests pending */ 4846 atomic_inc(&adapter->fsf_reqs_active); 4847 } 4848 return retval; 4849 } 4850 4851 #undef ZFCP_LOG_AREA 4852