1 /* 2 * This file is part of the zfcp device driver for 3 * FCP adapters for IBM System z9 and zSeries. 4 * 5 * (C) Copyright IBM Corp. 2002, 2006 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 #include "zfcp_ext.h" 23 24 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); 25 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); 26 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); 27 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); 28 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); 29 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); 30 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); 31 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); 32 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); 33 static int zfcp_fsf_send_fcp_command_task_management_handler( 34 struct zfcp_fsf_req *); 35 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); 36 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); 37 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); 38 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); 39 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); 40 static inline int zfcp_fsf_req_sbal_check( 41 unsigned long *, struct zfcp_qdio_queue *, int); 42 static inline int zfcp_use_one_sbal( 43 struct scatterlist *, int, struct scatterlist *, int); 44 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); 45 static int zfcp_fsf_req_send(struct zfcp_fsf_req *); 46 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); 47 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); 48 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); 49 static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *, 50 struct fsf_link_down_info *); 51 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); 52 53 /* association between FSF command and FSF QTCB type */ 54 static u32 fsf_qtcb_type[] = { 55 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 56 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 57 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 58 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 59 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 60 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 61 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 62 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 63 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 64 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 65 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 66 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 67 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 68 }; 69 70 static const char zfcp_act_subtable_type[5][8] = { 71 "unknown", "OS", "WWPN", "DID", "LUN" 72 }; 73 74 /****************************************************************/ 75 /*************** FSF related Functions *************************/ 76 /****************************************************************/ 77 78 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF 79 80 /* 81 * function: zfcp_fsf_req_alloc 82 * 83 * purpose: Obtains an fsf_req and potentially a qtcb (for all but 84 * unsolicited requests) via helper functions 85 * Does some initial fsf request set-up. 86 * 87 * returns: pointer to allocated fsf_req if successfull 88 * NULL otherwise 89 * 90 * locks: none 91 * 92 */ 93 static struct zfcp_fsf_req * 94 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) 95 { 96 size_t size; 97 void *ptr; 98 struct zfcp_fsf_req *fsf_req = NULL; 99 100 if (req_flags & ZFCP_REQ_NO_QTCB) 101 size = sizeof(struct zfcp_fsf_req); 102 else 103 size = sizeof(struct zfcp_fsf_req_qtcb); 104 105 if (likely(pool)) 106 ptr = mempool_alloc(pool, GFP_ATOMIC); 107 else { 108 if (req_flags & ZFCP_REQ_NO_QTCB) 109 ptr = kmalloc(size, GFP_ATOMIC); 110 else 111 ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, 112 GFP_ATOMIC); 113 } 114 115 if (unlikely(!ptr)) 116 goto out; 117 118 memset(ptr, 0, size); 119 120 if (req_flags & ZFCP_REQ_NO_QTCB) { 121 fsf_req = (struct zfcp_fsf_req *) ptr; 122 } else { 123 fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req; 124 fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb; 125 } 126 127 fsf_req->pool = pool; 128 129 out: 130 return fsf_req; 131 } 132 133 /* 134 * function: zfcp_fsf_req_free 135 * 136 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or 137 * returns it into the pool via helper functions. 138 * 139 * returns: sod all 140 * 141 * locks: none 142 */ 143 void 144 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) 145 { 146 if (likely(fsf_req->pool)) { 147 mempool_free(fsf_req, fsf_req->pool); 148 return; 149 } 150 151 if (fsf_req->qtcb) { 152 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req); 153 return; 154 } 155 156 kfree(fsf_req); 157 } 158 159 /* 160 * Never ever call this without shutting down the adapter first. 161 * Otherwise the adapter would continue using and corrupting s390 storage. 162 * Included BUG_ON() call to ensure this is done. 163 * ERP is supposed to be the only user of this function. 164 */ 165 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 166 { 167 struct zfcp_fsf_req *fsf_req, *tmp; 168 unsigned long flags; 169 LIST_HEAD(remove_queue); 170 unsigned int i; 171 172 BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)); 173 spin_lock_irqsave(&adapter->req_list_lock, flags); 174 atomic_set(&adapter->reqs_active, 0); 175 for (i = 0; i < REQUEST_LIST_SIZE; i++) 176 list_splice_init(&adapter->req_list[i], &remove_queue); 177 spin_unlock_irqrestore(&adapter->req_list_lock, flags); 178 179 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { 180 list_del(&fsf_req->list); 181 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 182 zfcp_fsf_req_complete(fsf_req); 183 } 184 } 185 186 /* 187 * function: zfcp_fsf_req_complete 188 * 189 * purpose: Updates active counts and timers for openfcp-reqs 190 * May cleanup request after req_eval returns 191 * 192 * returns: 0 - success 193 * !0 - failure 194 * 195 * context: 196 */ 197 int 198 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) 199 { 200 int retval = 0; 201 int cleanup; 202 203 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { 204 ZFCP_LOG_DEBUG("Status read response received\n"); 205 /* 206 * Note: all cleanup handling is done in the callchain of 207 * the function call-chain below. 208 */ 209 zfcp_fsf_status_read_handler(fsf_req); 210 goto out; 211 } else { 212 del_timer(&fsf_req->timer); 213 zfcp_fsf_protstatus_eval(fsf_req); 214 } 215 216 /* 217 * fsf_req may be deleted due to waking up functions, so 218 * cleanup is saved here and used later 219 */ 220 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 221 cleanup = 1; 222 else 223 cleanup = 0; 224 225 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; 226 227 /* cleanup request if requested by initiator */ 228 if (likely(cleanup)) { 229 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); 230 /* 231 * lock must not be held here since it will be 232 * grabed by the called routine, too 233 */ 234 zfcp_fsf_req_free(fsf_req); 235 } else { 236 /* notify initiator waiting for the requests completion */ 237 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); 238 /* 239 * FIXME: Race! We must not access fsf_req here as it might have been 240 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED 241 * flag. It's an improbable case. But, we have the same paranoia for 242 * the cleanup flag already. 243 * Might better be handled using complete()? 244 * (setting the flag and doing wakeup ought to be atomic 245 * with regard to checking the flag as long as waitqueue is 246 * part of the to be released structure) 247 */ 248 wake_up(&fsf_req->completion_wq); 249 } 250 251 out: 252 return retval; 253 } 254 255 /* 256 * function: zfcp_fsf_protstatus_eval 257 * 258 * purpose: evaluates the QTCB of the finished FSF request 259 * and initiates appropriate actions 260 * (usually calling FSF command specific handlers) 261 * 262 * returns: 263 * 264 * context: 265 * 266 * locks: 267 */ 268 static int 269 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) 270 { 271 int retval = 0; 272 struct zfcp_adapter *adapter = fsf_req->adapter; 273 struct fsf_qtcb *qtcb = fsf_req->qtcb; 274 union fsf_prot_status_qual *prot_status_qual = 275 &qtcb->prefix.prot_status_qual; 276 277 zfcp_hba_dbf_event_fsf_response(fsf_req); 278 279 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 280 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", 281 (unsigned long) fsf_req); 282 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 283 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ 284 goto skip_protstatus; 285 } 286 287 /* log additional information provided by FSF (if any) */ 288 if (likely(qtcb->header.log_length)) { 289 /* do not trust them ;-) */ 290 if (unlikely(qtcb->header.log_start > 291 sizeof(struct fsf_qtcb))) { 292 ZFCP_LOG_NORMAL 293 ("bug: ULP (FSF logging) log data starts " 294 "beyond end of packet header. Ignored. " 295 "(start=%i, size=%li)\n", 296 qtcb->header.log_start, 297 sizeof(struct fsf_qtcb)); 298 goto forget_log; 299 } 300 if (unlikely((size_t) (qtcb->header.log_start + 301 qtcb->header.log_length) > 302 sizeof(struct fsf_qtcb))) { 303 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends " 304 "beyond end of packet header. Ignored. " 305 "(start=%i, length=%i, size=%li)\n", 306 qtcb->header.log_start, 307 qtcb->header.log_length, 308 sizeof(struct fsf_qtcb)); 309 goto forget_log; 310 } 311 ZFCP_LOG_TRACE("ULP log data: \n"); 312 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 313 (char *) qtcb + qtcb->header.log_start, 314 qtcb->header.log_length); 315 } 316 forget_log: 317 318 /* evaluate FSF Protocol Status */ 319 switch (qtcb->prefix.prot_status) { 320 321 case FSF_PROT_GOOD: 322 case FSF_PROT_FSF_STATUS_PRESENTED: 323 break; 324 325 case FSF_PROT_QTCB_VERSION_ERROR: 326 ZFCP_LOG_NORMAL("error: The adapter %s contains " 327 "microcode of version 0x%x, the device driver " 328 "only supports 0x%x. Aborting.\n", 329 zfcp_get_busid_by_adapter(adapter), 330 prot_status_qual->version_error.fsf_version, 331 ZFCP_QTCB_VERSION); 332 zfcp_erp_adapter_shutdown(adapter, 0); 333 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 334 break; 335 336 case FSF_PROT_SEQ_NUMB_ERROR: 337 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " 338 "driver (0x%x) and adapter %s (0x%x). " 339 "Restarting all operations on this adapter.\n", 340 qtcb->prefix.req_seq_no, 341 zfcp_get_busid_by_adapter(adapter), 342 prot_status_qual->sequence_error.exp_req_seq_no); 343 zfcp_erp_adapter_reopen(adapter, 0); 344 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 345 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 346 break; 347 348 case FSF_PROT_UNSUPP_QTCB_TYPE: 349 ZFCP_LOG_NORMAL("error: Packet header type used by the " 350 "device driver is incompatible with " 351 "that used on adapter %s. " 352 "Stopping all operations on this adapter.\n", 353 zfcp_get_busid_by_adapter(adapter)); 354 zfcp_erp_adapter_shutdown(adapter, 0); 355 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 356 break; 357 358 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 359 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 360 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 361 &(adapter->status)); 362 break; 363 364 case FSF_PROT_DUPLICATE_REQUEST_ID: 365 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " 366 "to the adapter %s is ambiguous. " 367 "Stopping all operations on this adapter.\n", 368 *(unsigned long long*) 369 (&qtcb->bottom.support.req_handle), 370 zfcp_get_busid_by_adapter(adapter)); 371 zfcp_erp_adapter_shutdown(adapter, 0); 372 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 373 break; 374 375 case FSF_PROT_LINK_DOWN: 376 zfcp_fsf_link_down_info_eval(adapter, 377 &prot_status_qual->link_down_info); 378 zfcp_erp_adapter_reopen(adapter, 0); 379 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 380 break; 381 382 case FSF_PROT_REEST_QUEUE: 383 ZFCP_LOG_NORMAL("The local link to adapter with " 384 "%s was re-plugged. " 385 "Re-starting operations on this adapter.\n", 386 zfcp_get_busid_by_adapter(adapter)); 387 /* All ports should be marked as ready to run again */ 388 zfcp_erp_modify_adapter_status(adapter, 389 ZFCP_STATUS_COMMON_RUNNING, 390 ZFCP_SET); 391 zfcp_erp_adapter_reopen(adapter, 392 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 393 | ZFCP_STATUS_COMMON_ERP_FAILED); 394 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 395 break; 396 397 case FSF_PROT_ERROR_STATE: 398 ZFCP_LOG_NORMAL("error: The adapter %s " 399 "has entered the error state. " 400 "Restarting all operations on this " 401 "adapter.\n", 402 zfcp_get_busid_by_adapter(adapter)); 403 zfcp_erp_adapter_reopen(adapter, 0); 404 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 405 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 406 break; 407 408 default: 409 ZFCP_LOG_NORMAL("bug: Transfer protocol status information " 410 "provided by the adapter %s " 411 "is not compatible with the device driver. " 412 "Stopping all operations on this adapter. " 413 "(debug info 0x%x).\n", 414 zfcp_get_busid_by_adapter(adapter), 415 qtcb->prefix.prot_status); 416 zfcp_erp_adapter_shutdown(adapter, 0); 417 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 418 } 419 420 skip_protstatus: 421 /* 422 * always call specific handlers to give them a chance to do 423 * something meaningful even in error cases 424 */ 425 zfcp_fsf_fsfstatus_eval(fsf_req); 426 return retval; 427 } 428 429 /* 430 * function: zfcp_fsf_fsfstatus_eval 431 * 432 * purpose: evaluates FSF status of completed FSF request 433 * and acts accordingly 434 * 435 * returns: 436 */ 437 static int 438 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) 439 { 440 int retval = 0; 441 442 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 443 goto skip_fsfstatus; 444 } 445 446 /* evaluate FSF Status */ 447 switch (fsf_req->qtcb->header.fsf_status) { 448 case FSF_UNKNOWN_COMMAND: 449 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 450 "not known by the adapter %s " 451 "Stopping all operations on this adapter. " 452 "(debug info 0x%x).\n", 453 zfcp_get_busid_by_adapter(fsf_req->adapter), 454 fsf_req->qtcb->header.fsf_command); 455 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 456 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 457 break; 458 459 case FSF_FCP_RSP_AVAILABLE: 460 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " 461 "SCSI stack.\n"); 462 break; 463 464 case FSF_ADAPTER_STATUS_AVAILABLE: 465 zfcp_fsf_fsfstatus_qual_eval(fsf_req); 466 break; 467 } 468 469 skip_fsfstatus: 470 /* 471 * always call specific handlers to give them a chance to do 472 * something meaningful even in error cases 473 */ 474 zfcp_fsf_req_dispatch(fsf_req); 475 476 return retval; 477 } 478 479 /* 480 * function: zfcp_fsf_fsfstatus_qual_eval 481 * 482 * purpose: evaluates FSF status-qualifier of completed FSF request 483 * and acts accordingly 484 * 485 * returns: 486 */ 487 static int 488 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) 489 { 490 int retval = 0; 491 492 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 493 case FSF_SQ_FCP_RSP_AVAILABLE: 494 break; 495 case FSF_SQ_RETRY_IF_POSSIBLE: 496 /* The SCSI-stack may now issue retries or escalate */ 497 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 498 break; 499 case FSF_SQ_COMMAND_ABORTED: 500 /* Carry the aborted state on to upper layer */ 501 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; 502 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 503 break; 504 case FSF_SQ_NO_RECOM: 505 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a" 506 "problem on the adapter %s " 507 "Stopping all operations on this adapter. ", 508 zfcp_get_busid_by_adapter(fsf_req->adapter)); 509 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 510 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 511 break; 512 case FSF_SQ_ULP_PROGRAMMING_ERROR: 513 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " 514 "(adapter %s)\n", 515 zfcp_get_busid_by_adapter(fsf_req->adapter)); 516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 517 break; 518 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 519 case FSF_SQ_NO_RETRY_POSSIBLE: 520 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 521 /* dealt with in the respective functions */ 522 break; 523 default: 524 ZFCP_LOG_NORMAL("bug: Additional status info could " 525 "not be interpreted properly.\n"); 526 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 527 (char *) &fsf_req->qtcb->header.fsf_status_qual, 528 sizeof (union fsf_status_qual)); 529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 530 break; 531 } 532 533 return retval; 534 } 535 536 /** 537 * zfcp_fsf_link_down_info_eval - evaluate link down information block 538 */ 539 static void 540 zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter, 541 struct fsf_link_down_info *link_down) 542 { 543 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 544 &adapter->status)) 545 return; 546 547 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); 548 549 if (link_down == NULL) 550 goto out; 551 552 switch (link_down->error_code) { 553 case FSF_PSQ_LINK_NO_LIGHT: 554 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 555 "(no light detected)\n", 556 zfcp_get_busid_by_adapter(adapter)); 557 break; 558 case FSF_PSQ_LINK_WRAP_PLUG: 559 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 560 "(wrap plug detected)\n", 561 zfcp_get_busid_by_adapter(adapter)); 562 break; 563 case FSF_PSQ_LINK_NO_FCP: 564 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 565 "(adjacent node on link does not support FCP)\n", 566 zfcp_get_busid_by_adapter(adapter)); 567 break; 568 case FSF_PSQ_LINK_FIRMWARE_UPDATE: 569 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 570 "(firmware update in progress)\n", 571 zfcp_get_busid_by_adapter(adapter)); 572 break; 573 case FSF_PSQ_LINK_INVALID_WWPN: 574 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 575 "(duplicate or invalid WWPN detected)\n", 576 zfcp_get_busid_by_adapter(adapter)); 577 break; 578 case FSF_PSQ_LINK_NO_NPIV_SUPPORT: 579 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 580 "(no support for NPIV by Fabric)\n", 581 zfcp_get_busid_by_adapter(adapter)); 582 break; 583 case FSF_PSQ_LINK_NO_FCP_RESOURCES: 584 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 585 "(out of resource in FCP daughtercard)\n", 586 zfcp_get_busid_by_adapter(adapter)); 587 break; 588 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: 589 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 590 "(out of resource in Fabric)\n", 591 zfcp_get_busid_by_adapter(adapter)); 592 break; 593 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: 594 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 595 "(unable to Fabric login)\n", 596 zfcp_get_busid_by_adapter(adapter)); 597 break; 598 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: 599 ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n", 600 zfcp_get_busid_by_adapter(adapter)); 601 break; 602 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: 603 ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n", 604 zfcp_get_busid_by_adapter(adapter)); 605 break; 606 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: 607 ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n", 608 zfcp_get_busid_by_adapter(adapter)); 609 break; 610 default: 611 ZFCP_LOG_NORMAL("The local link to adapter %s is down " 612 "(warning: unknown reason code %d)\n", 613 zfcp_get_busid_by_adapter(adapter), 614 link_down->error_code); 615 } 616 617 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) 618 ZFCP_LOG_DEBUG("Debug information to link down: " 619 "primary_status=0x%02x " 620 "ioerr_code=0x%02x " 621 "action_code=0x%02x " 622 "reason_code=0x%02x " 623 "explanation_code=0x%02x " 624 "vendor_specific_code=0x%02x\n", 625 link_down->primary_status, 626 link_down->ioerr_code, 627 link_down->action_code, 628 link_down->reason_code, 629 link_down->explanation_code, 630 link_down->vendor_specific_code); 631 632 out: 633 zfcp_erp_adapter_failed(adapter); 634 } 635 636 /* 637 * function: zfcp_fsf_req_dispatch 638 * 639 * purpose: calls the appropriate command specific handler 640 * 641 * returns: 642 */ 643 static int 644 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) 645 { 646 struct zfcp_erp_action *erp_action = fsf_req->erp_action; 647 struct zfcp_adapter *adapter = fsf_req->adapter; 648 int retval = 0; 649 650 651 switch (fsf_req->fsf_command) { 652 653 case FSF_QTCB_FCP_CMND: 654 zfcp_fsf_send_fcp_command_handler(fsf_req); 655 break; 656 657 case FSF_QTCB_ABORT_FCP_CMND: 658 zfcp_fsf_abort_fcp_command_handler(fsf_req); 659 break; 660 661 case FSF_QTCB_SEND_GENERIC: 662 zfcp_fsf_send_ct_handler(fsf_req); 663 break; 664 665 case FSF_QTCB_OPEN_PORT_WITH_DID: 666 zfcp_fsf_open_port_handler(fsf_req); 667 break; 668 669 case FSF_QTCB_OPEN_LUN: 670 zfcp_fsf_open_unit_handler(fsf_req); 671 break; 672 673 case FSF_QTCB_CLOSE_LUN: 674 zfcp_fsf_close_unit_handler(fsf_req); 675 break; 676 677 case FSF_QTCB_CLOSE_PORT: 678 zfcp_fsf_close_port_handler(fsf_req); 679 break; 680 681 case FSF_QTCB_CLOSE_PHYSICAL_PORT: 682 zfcp_fsf_close_physical_port_handler(fsf_req); 683 break; 684 685 case FSF_QTCB_EXCHANGE_CONFIG_DATA: 686 zfcp_fsf_exchange_config_data_handler(fsf_req); 687 break; 688 689 case FSF_QTCB_EXCHANGE_PORT_DATA: 690 zfcp_fsf_exchange_port_data_handler(fsf_req); 691 break; 692 693 case FSF_QTCB_SEND_ELS: 694 zfcp_fsf_send_els_handler(fsf_req); 695 break; 696 697 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 698 zfcp_fsf_control_file_handler(fsf_req); 699 break; 700 701 case FSF_QTCB_UPLOAD_CONTROL_FILE: 702 zfcp_fsf_control_file_handler(fsf_req); 703 break; 704 705 default: 706 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 707 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 708 "not supported by the adapter %s\n", 709 zfcp_get_busid_by_adapter(adapter)); 710 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) 711 ZFCP_LOG_NORMAL 712 ("bug: Command issued by the device driver differs " 713 "from the command returned by the adapter %s " 714 "(debug info 0x%x, 0x%x).\n", 715 zfcp_get_busid_by_adapter(adapter), 716 fsf_req->fsf_command, 717 fsf_req->qtcb->header.fsf_command); 718 } 719 720 if (!erp_action) 721 return retval; 722 723 zfcp_erp_async_handler(erp_action, 0); 724 725 return retval; 726 } 727 728 /* 729 * function: zfcp_fsf_status_read 730 * 731 * purpose: initiates a Status Read command at the specified adapter 732 * 733 * returns: 734 */ 735 int 736 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) 737 { 738 struct zfcp_fsf_req *fsf_req; 739 struct fsf_status_read_buffer *status_buffer; 740 unsigned long lock_flags; 741 volatile struct qdio_buffer_element *sbale; 742 int retval = 0; 743 744 /* setup new FSF request */ 745 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 746 req_flags | ZFCP_REQ_NO_QTCB, 747 adapter->pool.fsf_req_status_read, 748 &lock_flags, &fsf_req); 749 if (retval < 0) { 750 ZFCP_LOG_INFO("error: Could not create unsolicited status " 751 "buffer for adapter %s.\n", 752 zfcp_get_busid_by_adapter(adapter)); 753 goto failed_req_create; 754 } 755 756 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 757 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; 758 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; 759 fsf_req->sbale_curr = 2; 760 761 status_buffer = 762 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); 763 if (!status_buffer) { 764 ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); 765 goto failed_buf; 766 } 767 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); 768 fsf_req->data = (unsigned long) status_buffer; 769 770 /* insert pointer to respective buffer */ 771 sbale = zfcp_qdio_sbale_curr(fsf_req); 772 sbale->addr = (void *) status_buffer; 773 sbale->length = sizeof(struct fsf_status_read_buffer); 774 775 retval = zfcp_fsf_req_send(fsf_req); 776 if (retval) { 777 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " 778 "environment.\n"); 779 goto failed_req_send; 780 } 781 782 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", 783 zfcp_get_busid_by_adapter(adapter)); 784 goto out; 785 786 failed_req_send: 787 mempool_free(status_buffer, adapter->pool.data_status_read); 788 789 failed_buf: 790 zfcp_fsf_req_free(fsf_req); 791 failed_req_create: 792 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); 793 out: 794 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 795 return retval; 796 } 797 798 static int 799 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) 800 { 801 struct fsf_status_read_buffer *status_buffer; 802 struct zfcp_adapter *adapter; 803 struct zfcp_port *port; 804 unsigned long flags; 805 806 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; 807 adapter = fsf_req->adapter; 808 809 read_lock_irqsave(&zfcp_data.config_lock, flags); 810 list_for_each_entry(port, &adapter->port_list_head, list) 811 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) 812 break; 813 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 814 815 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { 816 ZFCP_LOG_NORMAL("bug: Reopen port indication received for" 817 "nonexisting port with d_id 0x%06x on " 818 "adapter %s. Ignored.\n", 819 status_buffer->d_id & ZFCP_DID_MASK, 820 zfcp_get_busid_by_adapter(adapter)); 821 goto out; 822 } 823 824 switch (status_buffer->status_subtype) { 825 826 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: 827 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:"); 828 zfcp_erp_port_reopen(port, 0); 829 break; 830 831 case FSF_STATUS_READ_SUB_ERROR_PORT: 832 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:"); 833 zfcp_erp_port_shutdown(port, 0); 834 break; 835 836 default: 837 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:"); 838 debug_exception(adapter->erp_dbf, 0, 839 &status_buffer->status_subtype, sizeof (u32)); 840 ZFCP_LOG_NORMAL("bug: Undefined status subtype received " 841 "for a reopen indication on port with " 842 "d_id 0x%06x on the adapter %s. " 843 "Ignored. (debug info 0x%x)\n", 844 status_buffer->d_id, 845 zfcp_get_busid_by_adapter(adapter), 846 status_buffer->status_subtype); 847 } 848 out: 849 return 0; 850 } 851 852 /* 853 * function: zfcp_fsf_status_read_handler 854 * 855 * purpose: is called for finished Open Port command 856 * 857 * returns: 858 */ 859 static int 860 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) 861 { 862 int retval = 0; 863 struct zfcp_adapter *adapter = fsf_req->adapter; 864 struct fsf_status_read_buffer *status_buffer = 865 (struct fsf_status_read_buffer *) fsf_req->data; 866 struct fsf_bit_error_payload *fsf_bit_error; 867 868 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 869 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); 870 mempool_free(status_buffer, adapter->pool.data_status_read); 871 zfcp_fsf_req_free(fsf_req); 872 goto out; 873 } 874 875 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); 876 877 switch (status_buffer->status_type) { 878 879 case FSF_STATUS_READ_PORT_CLOSED: 880 zfcp_fsf_status_read_port_closed(fsf_req); 881 break; 882 883 case FSF_STATUS_READ_INCOMING_ELS: 884 zfcp_fsf_incoming_els(fsf_req); 885 break; 886 887 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 888 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", 889 zfcp_get_busid_by_adapter(adapter)); 890 break; 891 892 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 893 fsf_bit_error = (struct fsf_bit_error_payload *) 894 status_buffer->payload; 895 ZFCP_LOG_NORMAL("Warning: bit error threshold data " 896 "received (adapter %s, " 897 "link failures = %i, loss of sync errors = %i, " 898 "loss of signal errors = %i, " 899 "primitive sequence errors = %i, " 900 "invalid transmission word errors = %i, " 901 "CRC errors = %i)\n", 902 zfcp_get_busid_by_adapter(adapter), 903 fsf_bit_error->link_failure_error_count, 904 fsf_bit_error->loss_of_sync_error_count, 905 fsf_bit_error->loss_of_signal_error_count, 906 fsf_bit_error->primitive_sequence_error_count, 907 fsf_bit_error->invalid_transmission_word_error_count, 908 fsf_bit_error->crc_error_count); 909 ZFCP_LOG_INFO("Additional bit error threshold data " 910 "(adapter %s, " 911 "primitive sequence event time-outs = %i, " 912 "elastic buffer overrun errors = %i, " 913 "advertised receive buffer-to-buffer credit = %i, " 914 "current receice buffer-to-buffer credit = %i, " 915 "advertised transmit buffer-to-buffer credit = %i, " 916 "current transmit buffer-to-buffer credit = %i)\n", 917 zfcp_get_busid_by_adapter(adapter), 918 fsf_bit_error->primitive_sequence_event_timeout_count, 919 fsf_bit_error->elastic_buffer_overrun_error_count, 920 fsf_bit_error->advertised_receive_b2b_credit, 921 fsf_bit_error->current_receive_b2b_credit, 922 fsf_bit_error->advertised_transmit_b2b_credit, 923 fsf_bit_error->current_transmit_b2b_credit); 924 break; 925 926 case FSF_STATUS_READ_LINK_DOWN: 927 switch (status_buffer->status_subtype) { 928 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: 929 ZFCP_LOG_INFO("Physical link to adapter %s is down\n", 930 zfcp_get_busid_by_adapter(adapter)); 931 zfcp_fsf_link_down_info_eval(adapter, 932 (struct fsf_link_down_info *) 933 &status_buffer->payload); 934 break; 935 case FSF_STATUS_READ_SUB_FDISC_FAILED: 936 ZFCP_LOG_INFO("Local link to adapter %s is down " 937 "due to failed FDISC login\n", 938 zfcp_get_busid_by_adapter(adapter)); 939 zfcp_fsf_link_down_info_eval(adapter, 940 (struct fsf_link_down_info *) 941 &status_buffer->payload); 942 break; 943 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: 944 ZFCP_LOG_INFO("Local link to adapter %s is down " 945 "due to firmware update on adapter\n", 946 zfcp_get_busid_by_adapter(adapter)); 947 zfcp_fsf_link_down_info_eval(adapter, NULL); 948 break; 949 default: 950 ZFCP_LOG_INFO("Local link to adapter %s is down " 951 "due to unknown reason\n", 952 zfcp_get_busid_by_adapter(adapter)); 953 zfcp_fsf_link_down_info_eval(adapter, NULL); 954 }; 955 break; 956 957 case FSF_STATUS_READ_LINK_UP: 958 ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. " 959 "Restarting operations on this adapter\n", 960 zfcp_get_busid_by_adapter(adapter)); 961 /* All ports should be marked as ready to run again */ 962 zfcp_erp_modify_adapter_status(adapter, 963 ZFCP_STATUS_COMMON_RUNNING, 964 ZFCP_SET); 965 zfcp_erp_adapter_reopen(adapter, 966 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 967 | ZFCP_STATUS_COMMON_ERP_FAILED); 968 break; 969 970 case FSF_STATUS_READ_NOTIFICATION_LOST: 971 ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: " 972 "adapter %s%s%s%s%s%s%s%s%s\n", 973 zfcp_get_busid_by_adapter(adapter), 974 (status_buffer->status_subtype & 975 FSF_STATUS_READ_SUB_INCOMING_ELS) ? 976 ", incoming ELS" : "", 977 (status_buffer->status_subtype & 978 FSF_STATUS_READ_SUB_SENSE_DATA) ? 979 ", sense data" : "", 980 (status_buffer->status_subtype & 981 FSF_STATUS_READ_SUB_LINK_STATUS) ? 982 ", link status change" : "", 983 (status_buffer->status_subtype & 984 FSF_STATUS_READ_SUB_PORT_CLOSED) ? 985 ", port close" : "", 986 (status_buffer->status_subtype & 987 FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ? 988 ", bit error exception" : "", 989 (status_buffer->status_subtype & 990 FSF_STATUS_READ_SUB_ACT_UPDATED) ? 991 ", ACT update" : "", 992 (status_buffer->status_subtype & 993 FSF_STATUS_READ_SUB_ACT_HARDENED) ? 994 ", ACT hardening" : "", 995 (status_buffer->status_subtype & 996 FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ? 997 ", adapter feature change" : ""); 998 999 if (status_buffer->status_subtype & 1000 FSF_STATUS_READ_SUB_ACT_UPDATED) 1001 zfcp_erp_adapter_access_changed(adapter); 1002 break; 1003 1004 case FSF_STATUS_READ_CFDC_UPDATED: 1005 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n", 1006 zfcp_get_busid_by_adapter(adapter)); 1007 zfcp_erp_adapter_access_changed(adapter); 1008 break; 1009 1010 case FSF_STATUS_READ_CFDC_HARDENED: 1011 switch (status_buffer->status_subtype) { 1012 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: 1013 ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n", 1014 zfcp_get_busid_by_adapter(adapter)); 1015 break; 1016 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: 1017 ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied " 1018 "to the secondary SE\n", 1019 zfcp_get_busid_by_adapter(adapter)); 1020 break; 1021 default: 1022 ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n", 1023 zfcp_get_busid_by_adapter(adapter)); 1024 } 1025 break; 1026 1027 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: 1028 debug_text_event(adapter->erp_dbf, 2, "unsol_features:"); 1029 ZFCP_LOG_INFO("List of supported features on adapter %s has " 1030 "been changed from 0x%08X to 0x%08X\n", 1031 zfcp_get_busid_by_adapter(adapter), 1032 *(u32*) (status_buffer->payload + 4), 1033 *(u32*) (status_buffer->payload)); 1034 adapter->adapter_features = *(u32*) status_buffer->payload; 1035 break; 1036 1037 default: 1038 ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown " 1039 "type was received (debug info 0x%x)\n", 1040 status_buffer->status_type); 1041 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", 1042 status_buffer); 1043 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1044 (char *) status_buffer, 1045 sizeof (struct fsf_status_read_buffer)); 1046 break; 1047 } 1048 mempool_free(status_buffer, adapter->pool.data_status_read); 1049 zfcp_fsf_req_free(fsf_req); 1050 /* 1051 * recycle buffer and start new request repeat until outbound 1052 * queue is empty or adapter shutdown is requested 1053 */ 1054 /* 1055 * FIXME(qdio): 1056 * we may wait in the req_create for 5s during shutdown, so 1057 * qdio_cleanup will have to wait at least that long before returning 1058 * with failure to allow us a proper cleanup under all circumstances 1059 */ 1060 /* 1061 * FIXME: 1062 * allocation failure possible? (Is this code needed?) 1063 */ 1064 retval = zfcp_fsf_status_read(adapter, 0); 1065 if (retval < 0) { 1066 ZFCP_LOG_INFO("Failed to create unsolicited status read " 1067 "request for the adapter %s.\n", 1068 zfcp_get_busid_by_adapter(adapter)); 1069 /* temporary fix to avoid status read buffer shortage */ 1070 adapter->status_read_failed++; 1071 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) 1072 < ZFCP_STATUS_READ_FAILED_THRESHOLD) { 1073 ZFCP_LOG_INFO("restart adapter %s due to status read " 1074 "buffer shortage\n", 1075 zfcp_get_busid_by_adapter(adapter)); 1076 zfcp_erp_adapter_reopen(adapter, 0); 1077 } 1078 } 1079 out: 1080 return retval; 1081 } 1082 1083 /* 1084 * function: zfcp_fsf_abort_fcp_command 1085 * 1086 * purpose: tells FSF to abort a running SCSI command 1087 * 1088 * returns: address of initiated FSF request 1089 * NULL - request could not be initiated 1090 * 1091 * FIXME(design): should be watched by a timeout !!! 1092 * FIXME(design) shouldn't this be modified to return an int 1093 * also...don't know how though 1094 */ 1095 struct zfcp_fsf_req * 1096 zfcp_fsf_abort_fcp_command(unsigned long old_req_id, 1097 struct zfcp_adapter *adapter, 1098 struct zfcp_unit *unit, int req_flags) 1099 { 1100 volatile struct qdio_buffer_element *sbale; 1101 struct zfcp_fsf_req *fsf_req = NULL; 1102 unsigned long lock_flags; 1103 int retval = 0; 1104 1105 /* setup new FSF request */ 1106 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, 1107 req_flags, adapter->pool.fsf_req_abort, 1108 &lock_flags, &fsf_req); 1109 if (retval < 0) { 1110 ZFCP_LOG_INFO("error: Failed to create an abort command " 1111 "request for lun 0x%016Lx on port 0x%016Lx " 1112 "on adapter %s.\n", 1113 unit->fcp_lun, 1114 unit->port->wwpn, 1115 zfcp_get_busid_by_adapter(adapter)); 1116 goto out; 1117 } 1118 1119 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1120 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1121 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1122 1123 fsf_req->data = (unsigned long) unit; 1124 1125 /* set handles of unit and its parent port in QTCB */ 1126 fsf_req->qtcb->header.lun_handle = unit->handle; 1127 fsf_req->qtcb->header.port_handle = unit->port->handle; 1128 1129 /* set handle of request which should be aborted */ 1130 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; 1131 1132 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); 1133 retval = zfcp_fsf_req_send(fsf_req); 1134 if (retval) { 1135 ZFCP_LOG_INFO("error: Failed to send abort command request " 1136 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 1137 zfcp_get_busid_by_adapter(adapter), 1138 unit->port->wwpn, unit->fcp_lun); 1139 zfcp_fsf_req_free(fsf_req); 1140 fsf_req = NULL; 1141 goto out; 1142 } 1143 1144 ZFCP_LOG_DEBUG("Abort FCP Command request initiated " 1145 "(adapter%s, port d_id=0x%06x, " 1146 "unit x%016Lx, old_req_id=0x%lx)\n", 1147 zfcp_get_busid_by_adapter(adapter), 1148 unit->port->d_id, 1149 unit->fcp_lun, old_req_id); 1150 out: 1151 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 1152 return fsf_req; 1153 } 1154 1155 /* 1156 * function: zfcp_fsf_abort_fcp_command_handler 1157 * 1158 * purpose: is called for finished Abort FCP Command request 1159 * 1160 * returns: 1161 */ 1162 static int 1163 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) 1164 { 1165 int retval = -EINVAL; 1166 struct zfcp_unit *unit; 1167 unsigned char status_qual = 1168 new_fsf_req->qtcb->header.fsf_status_qual.word[0]; 1169 1170 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1171 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ 1172 goto skip_fsfstatus; 1173 } 1174 1175 unit = (struct zfcp_unit *) new_fsf_req->data; 1176 1177 /* evaluate FSF status in QTCB */ 1178 switch (new_fsf_req->qtcb->header.fsf_status) { 1179 1180 case FSF_PORT_HANDLE_NOT_VALID: 1181 if (status_qual >> 4 != status_qual % 0xf) { 1182 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1183 "fsf_s_phand_nv0"); 1184 /* 1185 * In this case a command that was sent prior to a port 1186 * reopen was aborted (handles are different). This is 1187 * fine. 1188 */ 1189 } else { 1190 ZFCP_LOG_INFO("Temporary port identifier 0x%x for " 1191 "port 0x%016Lx on adapter %s invalid. " 1192 "This may happen occasionally.\n", 1193 unit->port->handle, 1194 unit->port->wwpn, 1195 zfcp_get_busid_by_unit(unit)); 1196 ZFCP_LOG_INFO("status qualifier:\n"); 1197 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1198 (char *) &new_fsf_req->qtcb->header. 1199 fsf_status_qual, 1200 sizeof (union fsf_status_qual)); 1201 /* Let's hope this sorts out the mess */ 1202 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1203 "fsf_s_phand_nv1"); 1204 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 1205 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1206 } 1207 break; 1208 1209 case FSF_LUN_HANDLE_NOT_VALID: 1210 if (status_qual >> 4 != status_qual % 0xf) { 1211 /* 2 */ 1212 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1213 "fsf_s_lhand_nv0"); 1214 /* 1215 * In this case a command that was sent prior to a unit 1216 * reopen was aborted (handles are different). 1217 * This is fine. 1218 */ 1219 } else { 1220 ZFCP_LOG_INFO 1221 ("Warning: Temporary LUN identifier 0x%x of LUN " 1222 "0x%016Lx on port 0x%016Lx on adapter %s is " 1223 "invalid. This may happen in rare cases. " 1224 "Trying to re-establish link.\n", 1225 unit->handle, 1226 unit->fcp_lun, 1227 unit->port->wwpn, 1228 zfcp_get_busid_by_unit(unit)); 1229 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 1230 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1231 (char *) &new_fsf_req->qtcb->header. 1232 fsf_status_qual, 1233 sizeof (union fsf_status_qual)); 1234 /* Let's hope this sorts out the mess */ 1235 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1236 "fsf_s_lhand_nv1"); 1237 zfcp_erp_port_reopen(unit->port, 0); 1238 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1239 } 1240 break; 1241 1242 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 1243 retval = 0; 1244 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1245 "fsf_s_no_exist"); 1246 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 1247 break; 1248 1249 case FSF_PORT_BOXED: 1250 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " 1251 "be reopened\n", unit->port->wwpn, 1252 zfcp_get_busid_by_unit(unit)); 1253 debug_text_event(new_fsf_req->adapter->erp_dbf, 2, 1254 "fsf_s_pboxed"); 1255 zfcp_erp_port_boxed(unit->port); 1256 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1257 | ZFCP_STATUS_FSFREQ_RETRY; 1258 break; 1259 1260 case FSF_LUN_BOXED: 1261 ZFCP_LOG_INFO( 1262 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " 1263 "to be reopened\n", 1264 unit->fcp_lun, unit->port->wwpn, 1265 zfcp_get_busid_by_unit(unit)); 1266 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 1267 zfcp_erp_unit_boxed(unit); 1268 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1269 | ZFCP_STATUS_FSFREQ_RETRY; 1270 break; 1271 1272 case FSF_ADAPTER_STATUS_AVAILABLE: 1273 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { 1274 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1275 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1276 "fsf_sq_ltest"); 1277 zfcp_test_link(unit->port); 1278 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1279 break; 1280 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1281 /* SCSI stack will escalate */ 1282 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1283 "fsf_sq_ulp"); 1284 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1285 break; 1286 default: 1287 ZFCP_LOG_NORMAL 1288 ("bug: Wrong status qualifier 0x%x arrived.\n", 1289 new_fsf_req->qtcb->header.fsf_status_qual.word[0]); 1290 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1291 "fsf_sq_inval:"); 1292 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1293 &new_fsf_req->qtcb->header. 1294 fsf_status_qual.word[0], sizeof (u32)); 1295 break; 1296 } 1297 break; 1298 1299 case FSF_GOOD: 1300 retval = 0; 1301 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 1302 break; 1303 1304 default: 1305 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1306 "(debug info 0x%x)\n", 1307 new_fsf_req->qtcb->header.fsf_status); 1308 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1309 "fsf_s_inval:"); 1310 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1311 &new_fsf_req->qtcb->header.fsf_status, 1312 sizeof (u32)); 1313 break; 1314 } 1315 skip_fsfstatus: 1316 return retval; 1317 } 1318 1319 /** 1320 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into 1321 * one SBALE 1322 * Two scatter-gather lists are passed, one for the reqeust and one for the 1323 * response. 1324 */ 1325 static inline int 1326 zfcp_use_one_sbal(struct scatterlist *req, int req_count, 1327 struct scatterlist *resp, int resp_count) 1328 { 1329 return ((req_count == 1) && 1330 (resp_count == 1) && 1331 (((unsigned long) zfcp_sg_to_address(&req[0]) & 1332 PAGE_MASK) == 1333 ((unsigned long) (zfcp_sg_to_address(&req[0]) + 1334 req[0].length - 1) & PAGE_MASK)) && 1335 (((unsigned long) zfcp_sg_to_address(&resp[0]) & 1336 PAGE_MASK) == 1337 ((unsigned long) (zfcp_sg_to_address(&resp[0]) + 1338 resp[0].length - 1) & PAGE_MASK))); 1339 } 1340 1341 /** 1342 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1343 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for 1344 * the request 1345 * @pool: pointer to memory pool, if non-null this pool is used to allocate 1346 * a struct zfcp_fsf_req 1347 * @erp_action: pointer to erp_action, if non-null the Generic Service request 1348 * is sent within error recovery 1349 */ 1350 int 1351 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, 1352 struct zfcp_erp_action *erp_action) 1353 { 1354 volatile struct qdio_buffer_element *sbale; 1355 struct zfcp_port *port; 1356 struct zfcp_adapter *adapter; 1357 struct zfcp_fsf_req *fsf_req; 1358 unsigned long lock_flags; 1359 int bytes; 1360 int ret = 0; 1361 1362 port = ct->port; 1363 adapter = port->adapter; 1364 1365 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, 1366 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 1367 pool, &lock_flags, &fsf_req); 1368 if (ret < 0) { 1369 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " 1370 "adapter: %s\n", 1371 zfcp_get_busid_by_adapter(adapter)); 1372 goto failed_req; 1373 } 1374 1375 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1376 if (zfcp_use_one_sbal(ct->req, ct->req_count, 1377 ct->resp, ct->resp_count)){ 1378 /* both request buffer and response buffer 1379 fit into one sbale each */ 1380 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1381 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); 1382 sbale[2].length = ct->req[0].length; 1383 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); 1384 sbale[3].length = ct->resp[0].length; 1385 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1386 } else if (adapter->adapter_features & 1387 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1388 /* try to use chained SBALs */ 1389 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1390 SBAL_FLAGS0_TYPE_WRITE_READ, 1391 ct->req, ct->req_count, 1392 ZFCP_MAX_SBALS_PER_CT_REQ); 1393 if (bytes <= 0) { 1394 ZFCP_LOG_INFO("error: creation of CT request failed " 1395 "on adapter %s\n", 1396 zfcp_get_busid_by_adapter(adapter)); 1397 if (bytes == 0) 1398 ret = -ENOMEM; 1399 else 1400 ret = bytes; 1401 1402 goto failed_send; 1403 } 1404 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1405 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1406 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1407 SBAL_FLAGS0_TYPE_WRITE_READ, 1408 ct->resp, ct->resp_count, 1409 ZFCP_MAX_SBALS_PER_CT_REQ); 1410 if (bytes <= 0) { 1411 ZFCP_LOG_INFO("error: creation of CT request failed " 1412 "on adapter %s\n", 1413 zfcp_get_busid_by_adapter(adapter)); 1414 if (bytes == 0) 1415 ret = -ENOMEM; 1416 else 1417 ret = bytes; 1418 1419 goto failed_send; 1420 } 1421 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1422 } else { 1423 /* reject send generic request */ 1424 ZFCP_LOG_INFO( 1425 "error: microcode does not support chained SBALs," 1426 "CT request too big (adapter %s)\n", 1427 zfcp_get_busid_by_adapter(adapter)); 1428 ret = -EOPNOTSUPP; 1429 goto failed_send; 1430 } 1431 1432 /* settings in QTCB */ 1433 fsf_req->qtcb->header.port_handle = port->handle; 1434 fsf_req->qtcb->bottom.support.service_class = 1435 ZFCP_FC_SERVICE_CLASS_DEFAULT; 1436 fsf_req->qtcb->bottom.support.timeout = ct->timeout; 1437 fsf_req->data = (unsigned long) ct; 1438 1439 zfcp_san_dbf_event_ct_request(fsf_req); 1440 1441 if (erp_action) { 1442 erp_action->fsf_req = fsf_req; 1443 fsf_req->erp_action = erp_action; 1444 zfcp_erp_start_timer(fsf_req); 1445 } else 1446 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 1447 1448 ret = zfcp_fsf_req_send(fsf_req); 1449 if (ret) { 1450 ZFCP_LOG_DEBUG("error: initiation of CT request failed " 1451 "(adapter %s, port 0x%016Lx)\n", 1452 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1453 goto failed_send; 1454 } 1455 1456 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", 1457 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1458 goto out; 1459 1460 failed_send: 1461 zfcp_fsf_req_free(fsf_req); 1462 if (erp_action != NULL) { 1463 erp_action->fsf_req = NULL; 1464 } 1465 failed_req: 1466 out: 1467 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1468 lock_flags); 1469 return ret; 1470 } 1471 1472 /** 1473 * zfcp_fsf_send_ct_handler - handler for Generic Service requests 1474 * @fsf_req: pointer to struct zfcp_fsf_req 1475 * 1476 * Data specific for the Generic Service request is passed using 1477 * fsf_req->data. There we find the pointer to struct zfcp_send_ct. 1478 * Usually a specific handler for the CT request is called which is 1479 * found in this structure. 1480 */ 1481 static int 1482 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) 1483 { 1484 struct zfcp_port *port; 1485 struct zfcp_adapter *adapter; 1486 struct zfcp_send_ct *send_ct; 1487 struct fsf_qtcb_header *header; 1488 struct fsf_qtcb_bottom_support *bottom; 1489 int retval = -EINVAL; 1490 u16 subtable, rule, counter; 1491 1492 adapter = fsf_req->adapter; 1493 send_ct = (struct zfcp_send_ct *) fsf_req->data; 1494 port = send_ct->port; 1495 header = &fsf_req->qtcb->header; 1496 bottom = &fsf_req->qtcb->bottom.support; 1497 1498 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1499 goto skip_fsfstatus; 1500 1501 /* evaluate FSF status in QTCB */ 1502 switch (header->fsf_status) { 1503 1504 case FSF_GOOD: 1505 zfcp_san_dbf_event_ct_response(fsf_req); 1506 retval = 0; 1507 break; 1508 1509 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1510 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1511 "class %d.\n", 1512 zfcp_get_busid_by_port(port), 1513 ZFCP_FC_SERVICE_CLASS_DEFAULT); 1514 /* stop operation for this adapter */ 1515 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1516 zfcp_erp_adapter_shutdown(adapter, 0); 1517 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1518 break; 1519 1520 case FSF_ADAPTER_STATUS_AVAILABLE: 1521 switch (header->fsf_status_qual.word[0]){ 1522 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1523 /* reopening link to port */ 1524 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1525 zfcp_test_link(port); 1526 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1527 break; 1528 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1529 /* ERP strategy will escalate */ 1530 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1531 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1532 break; 1533 default: 1534 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " 1535 "arrived.\n", 1536 header->fsf_status_qual.word[0]); 1537 break; 1538 } 1539 break; 1540 1541 case FSF_ACCESS_DENIED: 1542 ZFCP_LOG_NORMAL("access denied, cannot send generic service " 1543 "command (adapter %s, port d_id=0x%06x)\n", 1544 zfcp_get_busid_by_port(port), port->d_id); 1545 for (counter = 0; counter < 2; counter++) { 1546 subtable = header->fsf_status_qual.halfword[counter * 2]; 1547 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1548 switch (subtable) { 1549 case FSF_SQ_CFDC_SUBTABLE_OS: 1550 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1551 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1552 case FSF_SQ_CFDC_SUBTABLE_LUN: 1553 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1554 zfcp_act_subtable_type[subtable], rule); 1555 break; 1556 } 1557 } 1558 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1559 zfcp_erp_port_access_denied(port); 1560 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1561 break; 1562 1563 case FSF_GENERIC_COMMAND_REJECTED: 1564 ZFCP_LOG_INFO("generic service command rejected " 1565 "(adapter %s, port d_id=0x%06x)\n", 1566 zfcp_get_busid_by_port(port), port->d_id); 1567 ZFCP_LOG_INFO("status qualifier:\n"); 1568 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1569 (char *) &header->fsf_status_qual, 1570 sizeof (union fsf_status_qual)); 1571 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej"); 1572 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1573 break; 1574 1575 case FSF_PORT_HANDLE_NOT_VALID: 1576 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " 1577 "0x%016Lx on adapter %s invalid. This may " 1578 "happen occasionally.\n", port->handle, 1579 port->wwpn, zfcp_get_busid_by_port(port)); 1580 ZFCP_LOG_INFO("status qualifier:\n"); 1581 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1582 (char *) &header->fsf_status_qual, 1583 sizeof (union fsf_status_qual)); 1584 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv"); 1585 zfcp_erp_adapter_reopen(adapter, 0); 1586 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1587 break; 1588 1589 case FSF_PORT_BOXED: 1590 ZFCP_LOG_INFO("port needs to be reopened " 1591 "(adapter %s, port d_id=0x%06x)\n", 1592 zfcp_get_busid_by_port(port), port->d_id); 1593 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 1594 zfcp_erp_port_boxed(port); 1595 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1596 | ZFCP_STATUS_FSFREQ_RETRY; 1597 break; 1598 1599 /* following states should never occure, all cases avoided 1600 in zfcp_fsf_send_ct - but who knows ... */ 1601 case FSF_PAYLOAD_SIZE_MISMATCH: 1602 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " 1603 "req_buf_length=%d, resp_buf_length=%d)\n", 1604 zfcp_get_busid_by_adapter(adapter), 1605 bottom->req_buf_length, bottom->resp_buf_length); 1606 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1607 break; 1608 case FSF_REQUEST_SIZE_TOO_LARGE: 1609 ZFCP_LOG_INFO("request size too large (adapter: %s, " 1610 "req_buf_length=%d)\n", 1611 zfcp_get_busid_by_adapter(adapter), 1612 bottom->req_buf_length); 1613 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1614 break; 1615 case FSF_RESPONSE_SIZE_TOO_LARGE: 1616 ZFCP_LOG_INFO("response size too large (adapter: %s, " 1617 "resp_buf_length=%d)\n", 1618 zfcp_get_busid_by_adapter(adapter), 1619 bottom->resp_buf_length); 1620 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1621 break; 1622 case FSF_SBAL_MISMATCH: 1623 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1624 "resp_buf_length=%d)\n", 1625 zfcp_get_busid_by_adapter(adapter), 1626 bottom->req_buf_length, bottom->resp_buf_length); 1627 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1628 break; 1629 1630 default: 1631 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1632 "(debug info 0x%x)\n", header->fsf_status); 1633 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); 1634 debug_exception(adapter->erp_dbf, 0, 1635 &header->fsf_status_qual.word[0], sizeof (u32)); 1636 break; 1637 } 1638 1639 skip_fsfstatus: 1640 send_ct->status = retval; 1641 1642 if (send_ct->handler != NULL) 1643 send_ct->handler(send_ct->handler_data); 1644 1645 return retval; 1646 } 1647 1648 /** 1649 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1650 * @els: pointer to struct zfcp_send_els which contains all needed data for 1651 * the command. 1652 */ 1653 int 1654 zfcp_fsf_send_els(struct zfcp_send_els *els) 1655 { 1656 volatile struct qdio_buffer_element *sbale; 1657 struct zfcp_fsf_req *fsf_req; 1658 u32 d_id; 1659 struct zfcp_adapter *adapter; 1660 unsigned long lock_flags; 1661 int bytes; 1662 int ret = 0; 1663 1664 d_id = els->d_id; 1665 adapter = els->adapter; 1666 1667 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, 1668 ZFCP_REQ_AUTO_CLEANUP, 1669 NULL, &lock_flags, &fsf_req); 1670 if (ret < 0) { 1671 ZFCP_LOG_INFO("error: creation of ELS request failed " 1672 "(adapter %s, port d_id: 0x%06x)\n", 1673 zfcp_get_busid_by_adapter(adapter), d_id); 1674 goto failed_req; 1675 } 1676 1677 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1678 if (zfcp_use_one_sbal(els->req, els->req_count, 1679 els->resp, els->resp_count)){ 1680 /* both request buffer and response buffer 1681 fit into one sbale each */ 1682 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1683 sbale[2].addr = zfcp_sg_to_address(&els->req[0]); 1684 sbale[2].length = els->req[0].length; 1685 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); 1686 sbale[3].length = els->resp[0].length; 1687 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1688 } else if (adapter->adapter_features & 1689 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1690 /* try to use chained SBALs */ 1691 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1692 SBAL_FLAGS0_TYPE_WRITE_READ, 1693 els->req, els->req_count, 1694 ZFCP_MAX_SBALS_PER_ELS_REQ); 1695 if (bytes <= 0) { 1696 ZFCP_LOG_INFO("error: creation of ELS request failed " 1697 "(adapter %s, port d_id: 0x%06x)\n", 1698 zfcp_get_busid_by_adapter(adapter), d_id); 1699 if (bytes == 0) { 1700 ret = -ENOMEM; 1701 } else { 1702 ret = bytes; 1703 } 1704 goto failed_send; 1705 } 1706 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1707 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1708 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1709 SBAL_FLAGS0_TYPE_WRITE_READ, 1710 els->resp, els->resp_count, 1711 ZFCP_MAX_SBALS_PER_ELS_REQ); 1712 if (bytes <= 0) { 1713 ZFCP_LOG_INFO("error: creation of ELS request failed " 1714 "(adapter %s, port d_id: 0x%06x)\n", 1715 zfcp_get_busid_by_adapter(adapter), d_id); 1716 if (bytes == 0) { 1717 ret = -ENOMEM; 1718 } else { 1719 ret = bytes; 1720 } 1721 goto failed_send; 1722 } 1723 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1724 } else { 1725 /* reject request */ 1726 ZFCP_LOG_INFO("error: microcode does not support chained SBALs" 1727 ", ELS request too big (adapter %s, " 1728 "port d_id: 0x%06x)\n", 1729 zfcp_get_busid_by_adapter(adapter), d_id); 1730 ret = -EOPNOTSUPP; 1731 goto failed_send; 1732 } 1733 1734 /* settings in QTCB */ 1735 fsf_req->qtcb->bottom.support.d_id = d_id; 1736 fsf_req->qtcb->bottom.support.service_class = 1737 ZFCP_FC_SERVICE_CLASS_DEFAULT; 1738 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; 1739 fsf_req->data = (unsigned long) els; 1740 1741 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1742 1743 zfcp_san_dbf_event_els_request(fsf_req); 1744 1745 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 1746 ret = zfcp_fsf_req_send(fsf_req); 1747 if (ret) { 1748 ZFCP_LOG_DEBUG("error: initiation of ELS request failed " 1749 "(adapter %s, port d_id: 0x%06x)\n", 1750 zfcp_get_busid_by_adapter(adapter), d_id); 1751 goto failed_send; 1752 } 1753 1754 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " 1755 "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id); 1756 goto out; 1757 1758 failed_send: 1759 zfcp_fsf_req_free(fsf_req); 1760 1761 failed_req: 1762 out: 1763 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1764 lock_flags); 1765 1766 return ret; 1767 } 1768 1769 /** 1770 * zfcp_fsf_send_els_handler - handler for ELS commands 1771 * @fsf_req: pointer to struct zfcp_fsf_req 1772 * 1773 * Data specific for the ELS command is passed using 1774 * fsf_req->data. There we find the pointer to struct zfcp_send_els. 1775 * Usually a specific handler for the ELS command is called which is 1776 * found in this structure. 1777 */ 1778 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) 1779 { 1780 struct zfcp_adapter *adapter; 1781 struct zfcp_port *port; 1782 u32 d_id; 1783 struct fsf_qtcb_header *header; 1784 struct fsf_qtcb_bottom_support *bottom; 1785 struct zfcp_send_els *send_els; 1786 int retval = -EINVAL; 1787 u16 subtable, rule, counter; 1788 1789 send_els = (struct zfcp_send_els *) fsf_req->data; 1790 adapter = send_els->adapter; 1791 port = send_els->port; 1792 d_id = send_els->d_id; 1793 header = &fsf_req->qtcb->header; 1794 bottom = &fsf_req->qtcb->bottom.support; 1795 1796 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1797 goto skip_fsfstatus; 1798 1799 switch (header->fsf_status) { 1800 1801 case FSF_GOOD: 1802 zfcp_san_dbf_event_els_response(fsf_req); 1803 retval = 0; 1804 break; 1805 1806 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1807 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1808 "class %d.\n", 1809 zfcp_get_busid_by_adapter(adapter), 1810 ZFCP_FC_SERVICE_CLASS_DEFAULT); 1811 /* stop operation for this adapter */ 1812 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1813 zfcp_erp_adapter_shutdown(adapter, 0); 1814 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1815 break; 1816 1817 case FSF_ADAPTER_STATUS_AVAILABLE: 1818 switch (header->fsf_status_qual.word[0]){ 1819 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1820 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1821 if (port && (send_els->ls_code != ZFCP_LS_ADISC)) 1822 zfcp_test_link(port); 1823 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1824 break; 1825 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1826 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1827 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1828 retval = 1829 zfcp_handle_els_rjt(header->fsf_status_qual.word[1], 1830 (struct zfcp_ls_rjt_par *) 1831 &header->fsf_status_qual.word[2]); 1832 break; 1833 case FSF_SQ_RETRY_IF_POSSIBLE: 1834 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry"); 1835 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1836 break; 1837 default: 1838 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", 1839 header->fsf_status_qual.word[0]); 1840 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1841 (char*)header->fsf_status_qual.word, 16); 1842 } 1843 break; 1844 1845 case FSF_ELS_COMMAND_REJECTED: 1846 ZFCP_LOG_INFO("ELS has been rejected because command filter " 1847 "prohibited sending " 1848 "(adapter: %s, port d_id: 0x%06x)\n", 1849 zfcp_get_busid_by_adapter(adapter), d_id); 1850 1851 break; 1852 1853 case FSF_PAYLOAD_SIZE_MISMATCH: 1854 ZFCP_LOG_INFO( 1855 "ELS request size and ELS response size must be either " 1856 "both 0, or both greater than 0 " 1857 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", 1858 zfcp_get_busid_by_adapter(adapter), 1859 bottom->req_buf_length, 1860 bottom->resp_buf_length); 1861 break; 1862 1863 case FSF_REQUEST_SIZE_TOO_LARGE: 1864 ZFCP_LOG_INFO( 1865 "Length of the ELS request buffer, " 1866 "specified in QTCB bottom, " 1867 "exceeds the size of the buffers " 1868 "that have been allocated for ELS request data " 1869 "(adapter: %s, req_buf_length=%d)\n", 1870 zfcp_get_busid_by_adapter(adapter), 1871 bottom->req_buf_length); 1872 break; 1873 1874 case FSF_RESPONSE_SIZE_TOO_LARGE: 1875 ZFCP_LOG_INFO( 1876 "Length of the ELS response buffer, " 1877 "specified in QTCB bottom, " 1878 "exceeds the size of the buffers " 1879 "that have been allocated for ELS response data " 1880 "(adapter: %s, resp_buf_length=%d)\n", 1881 zfcp_get_busid_by_adapter(adapter), 1882 bottom->resp_buf_length); 1883 break; 1884 1885 case FSF_SBAL_MISMATCH: 1886 /* should never occure, avoided in zfcp_fsf_send_els */ 1887 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1888 "resp_buf_length=%d)\n", 1889 zfcp_get_busid_by_adapter(adapter), 1890 bottom->req_buf_length, bottom->resp_buf_length); 1891 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1892 break; 1893 1894 case FSF_ACCESS_DENIED: 1895 ZFCP_LOG_NORMAL("access denied, cannot send ELS command " 1896 "(adapter %s, port d_id=0x%06x)\n", 1897 zfcp_get_busid_by_adapter(adapter), d_id); 1898 for (counter = 0; counter < 2; counter++) { 1899 subtable = header->fsf_status_qual.halfword[counter * 2]; 1900 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1901 switch (subtable) { 1902 case FSF_SQ_CFDC_SUBTABLE_OS: 1903 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1904 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1905 case FSF_SQ_CFDC_SUBTABLE_LUN: 1906 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1907 zfcp_act_subtable_type[subtable], rule); 1908 break; 1909 } 1910 } 1911 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1912 if (port != NULL) 1913 zfcp_erp_port_access_denied(port); 1914 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1915 break; 1916 1917 default: 1918 ZFCP_LOG_NORMAL( 1919 "bug: An unknown FSF Status was presented " 1920 "(adapter: %s, fsf_status=0x%08x)\n", 1921 zfcp_get_busid_by_adapter(adapter), 1922 header->fsf_status); 1923 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval"); 1924 debug_exception(adapter->erp_dbf, 0, 1925 &header->fsf_status_qual.word[0], sizeof(u32)); 1926 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1927 break; 1928 } 1929 1930 skip_fsfstatus: 1931 send_els->status = retval; 1932 1933 if (send_els->handler) 1934 send_els->handler(send_els->handler_data); 1935 1936 return retval; 1937 } 1938 1939 int 1940 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 1941 { 1942 volatile struct qdio_buffer_element *sbale; 1943 struct zfcp_fsf_req *fsf_req; 1944 unsigned long lock_flags; 1945 int retval = 0; 1946 1947 /* setup new FSF request */ 1948 retval = zfcp_fsf_req_create(erp_action->adapter, 1949 FSF_QTCB_EXCHANGE_CONFIG_DATA, 1950 ZFCP_REQ_AUTO_CLEANUP, 1951 erp_action->adapter->pool.fsf_req_erp, 1952 &lock_flags, &fsf_req); 1953 if (retval < 0) { 1954 ZFCP_LOG_INFO("error: Could not create exchange configuration " 1955 "data request for adapter %s.\n", 1956 zfcp_get_busid_by_adapter(erp_action->adapter)); 1957 goto out; 1958 } 1959 1960 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1961 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1962 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1963 1964 fsf_req->qtcb->bottom.config.feature_selection = 1965 FSF_FEATURE_CFDC | 1966 FSF_FEATURE_LUN_SHARING | 1967 FSF_FEATURE_NOTIFICATION_LOST | 1968 FSF_FEATURE_UPDATE_ALERT; 1969 fsf_req->erp_action = erp_action; 1970 erp_action->fsf_req = fsf_req; 1971 1972 zfcp_erp_start_timer(fsf_req); 1973 retval = zfcp_fsf_req_send(fsf_req); 1974 if (retval) { 1975 ZFCP_LOG_INFO 1976 ("error: Could not send exchange configuration data " 1977 "command on the adapter %s\n", 1978 zfcp_get_busid_by_adapter(erp_action->adapter)); 1979 zfcp_fsf_req_free(fsf_req); 1980 erp_action->fsf_req = NULL; 1981 goto out; 1982 } 1983 1984 ZFCP_LOG_DEBUG("exchange configuration data request initiated " 1985 "(adapter %s)\n", 1986 zfcp_get_busid_by_adapter(erp_action->adapter)); 1987 1988 out: 1989 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 1990 lock_flags); 1991 return retval; 1992 } 1993 1994 /** 1995 * zfcp_fsf_exchange_config_evaluate 1996 * @fsf_req: fsf_req which belongs to xchg config data request 1997 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) 1998 * 1999 * returns: -EIO on error, 0 otherwise 2000 */ 2001 static int 2002 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2003 { 2004 struct fsf_qtcb_bottom_config *bottom; 2005 struct zfcp_adapter *adapter = fsf_req->adapter; 2006 struct Scsi_Host *shost = adapter->scsi_host; 2007 2008 bottom = &fsf_req->qtcb->bottom.config; 2009 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", 2010 bottom->low_qtcb_version, bottom->high_qtcb_version); 2011 adapter->fsf_lic_version = bottom->lic_version; 2012 adapter->adapter_features = bottom->adapter_features; 2013 adapter->connection_features = bottom->connection_features; 2014 adapter->peer_wwpn = 0; 2015 adapter->peer_wwnn = 0; 2016 adapter->peer_d_id = 0; 2017 2018 if (xchg_ok) { 2019 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; 2020 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; 2021 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; 2022 fc_host_speed(shost) = bottom->fc_link_speed; 2023 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; 2024 adapter->hydra_version = bottom->adapter_type; 2025 if (fc_host_permanent_port_name(shost) == -1) 2026 fc_host_permanent_port_name(shost) = 2027 fc_host_port_name(shost); 2028 if (bottom->fc_topology == FSF_TOPO_P2P) { 2029 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; 2030 adapter->peer_wwpn = bottom->plogi_payload.wwpn; 2031 adapter->peer_wwnn = bottom->plogi_payload.wwnn; 2032 fc_host_port_type(shost) = FC_PORTTYPE_PTP; 2033 } else if (bottom->fc_topology == FSF_TOPO_FABRIC) 2034 fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 2035 else if (bottom->fc_topology == FSF_TOPO_AL) 2036 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; 2037 else 2038 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 2039 } else { 2040 fc_host_node_name(shost) = 0; 2041 fc_host_port_name(shost) = 0; 2042 fc_host_port_id(shost) = 0; 2043 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 2044 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 2045 adapter->hydra_version = 0; 2046 } 2047 2048 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { 2049 adapter->hardware_version = bottom->hardware_version; 2050 memcpy(fc_host_serial_number(shost), bottom->serial_number, 2051 min(FC_SERIAL_NUMBER_SIZE, 17)); 2052 EBCASC(fc_host_serial_number(shost), 2053 min(FC_SERIAL_NUMBER_SIZE, 17)); 2054 } 2055 2056 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n" 2057 "WWNN 0x%016Lx, " 2058 "WWPN 0x%016Lx, " 2059 "S_ID 0x%06x,\n" 2060 "adapter version 0x%x, " 2061 "LIC version 0x%x, " 2062 "FC link speed %d Gb/s\n", 2063 zfcp_get_busid_by_adapter(adapter), 2064 (wwn_t) fc_host_node_name(shost), 2065 (wwn_t) fc_host_port_name(shost), 2066 fc_host_port_id(shost), 2067 adapter->hydra_version, 2068 adapter->fsf_lic_version, 2069 fc_host_speed(shost)); 2070 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { 2071 ZFCP_LOG_NORMAL("error: the adapter %s " 2072 "only supports newer control block " 2073 "versions in comparison to this device " 2074 "driver (try updated device driver)\n", 2075 zfcp_get_busid_by_adapter(adapter)); 2076 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); 2077 zfcp_erp_adapter_shutdown(adapter, 0); 2078 return -EIO; 2079 } 2080 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { 2081 ZFCP_LOG_NORMAL("error: the adapter %s " 2082 "only supports older control block " 2083 "versions than this device driver uses" 2084 "(consider a microcode upgrade)\n", 2085 zfcp_get_busid_by_adapter(adapter)); 2086 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); 2087 zfcp_erp_adapter_shutdown(adapter, 0); 2088 return -EIO; 2089 } 2090 return 0; 2091 } 2092 2093 /* 2094 * function: zfcp_fsf_exchange_config_data_handler 2095 * 2096 * purpose: is called for finished Exchange Configuration Data command 2097 * 2098 * returns: 2099 */ 2100 static int 2101 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) 2102 { 2103 struct fsf_qtcb_bottom_config *bottom; 2104 struct zfcp_adapter *adapter = fsf_req->adapter; 2105 struct fsf_qtcb *qtcb = fsf_req->qtcb; 2106 2107 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2108 return -EIO; 2109 2110 switch (qtcb->header.fsf_status) { 2111 2112 case FSF_GOOD: 2113 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) 2114 return -EIO; 2115 2116 switch (fc_host_port_type(adapter->scsi_host)) { 2117 case FC_PORTTYPE_PTP: 2118 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " 2119 "configuration detected at adapter %s\n" 2120 "Peer WWNN 0x%016llx, " 2121 "peer WWPN 0x%016llx, " 2122 "peer d_id 0x%06x\n", 2123 zfcp_get_busid_by_adapter(adapter), 2124 adapter->peer_wwnn, 2125 adapter->peer_wwpn, 2126 adapter->peer_d_id); 2127 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2128 "top-p-to-p"); 2129 break; 2130 case FC_PORTTYPE_NLPORT: 2131 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " 2132 "topology detected at adapter %s " 2133 "unsupported, shutting down adapter\n", 2134 zfcp_get_busid_by_adapter(adapter)); 2135 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2136 "top-al"); 2137 zfcp_erp_adapter_shutdown(adapter, 0); 2138 return -EIO; 2139 case FC_PORTTYPE_NPORT: 2140 ZFCP_LOG_NORMAL("Switched fabric fibrechannel " 2141 "network detected at adapter %s.\n", 2142 zfcp_get_busid_by_adapter(adapter)); 2143 break; 2144 default: 2145 ZFCP_LOG_NORMAL("bug: The fibrechannel topology " 2146 "reported by the exchange " 2147 "configuration command for " 2148 "the adapter %s is not " 2149 "of a type known to the zfcp " 2150 "driver, shutting down adapter\n", 2151 zfcp_get_busid_by_adapter(adapter)); 2152 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2153 "unknown-topo"); 2154 zfcp_erp_adapter_shutdown(adapter, 0); 2155 return -EIO; 2156 } 2157 bottom = &qtcb->bottom.config; 2158 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 2159 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " 2160 "allowed by the adapter %s " 2161 "is lower than the minimum " 2162 "required by the driver (%ld bytes).\n", 2163 bottom->max_qtcb_size, 2164 zfcp_get_busid_by_adapter(adapter), 2165 sizeof(struct fsf_qtcb)); 2166 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2167 "qtcb-size"); 2168 debug_event(fsf_req->adapter->erp_dbf, 0, 2169 &bottom->max_qtcb_size, sizeof (u32)); 2170 zfcp_erp_adapter_shutdown(adapter, 0); 2171 return -EIO; 2172 } 2173 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 2174 &adapter->status); 2175 break; 2176 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2177 debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); 2178 2179 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) 2180 return -EIO; 2181 2182 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); 2183 2184 zfcp_fsf_link_down_info_eval(adapter, 2185 &qtcb->header.fsf_status_qual.link_down_info); 2186 break; 2187 default: 2188 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); 2189 debug_event(fsf_req->adapter->erp_dbf, 0, 2190 &fsf_req->qtcb->header.fsf_status, sizeof (u32)); 2191 zfcp_erp_adapter_shutdown(adapter, 0); 2192 return -EIO; 2193 } 2194 return 0; 2195 } 2196 2197 /** 2198 * zfcp_fsf_exchange_port_data - request information about local port 2199 * @erp_action: ERP action for the adapter for which port data is requested 2200 * @adapter: for which port data is requested 2201 * @data: response to exchange port data request 2202 */ 2203 int 2204 zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action, 2205 struct zfcp_adapter *adapter, 2206 struct fsf_qtcb_bottom_port *data) 2207 { 2208 volatile struct qdio_buffer_element *sbale; 2209 struct zfcp_fsf_req *fsf_req; 2210 unsigned long lock_flags; 2211 int retval = 0; 2212 2213 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) { 2214 ZFCP_LOG_INFO("error: exchange port data " 2215 "command not supported by adapter %s\n", 2216 zfcp_get_busid_by_adapter(adapter)); 2217 return -EOPNOTSUPP; 2218 } 2219 2220 /* setup new FSF request */ 2221 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 2222 erp_action ? ZFCP_REQ_AUTO_CLEANUP : 0, 2223 NULL, &lock_flags, &fsf_req); 2224 if (retval < 0) { 2225 ZFCP_LOG_INFO("error: Out of resources. Could not create an " 2226 "exchange port data request for" 2227 "the adapter %s.\n", 2228 zfcp_get_busid_by_adapter(adapter)); 2229 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2230 lock_flags); 2231 return retval; 2232 } 2233 2234 if (data) 2235 fsf_req->data = (unsigned long) data; 2236 2237 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2238 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2239 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2240 2241 if (erp_action) { 2242 erp_action->fsf_req = fsf_req; 2243 fsf_req->erp_action = erp_action; 2244 zfcp_erp_start_timer(fsf_req); 2245 } else 2246 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 2247 2248 retval = zfcp_fsf_req_send(fsf_req); 2249 if (retval) { 2250 ZFCP_LOG_INFO("error: Could not send an exchange port data " 2251 "command on the adapter %s\n", 2252 zfcp_get_busid_by_adapter(adapter)); 2253 zfcp_fsf_req_free(fsf_req); 2254 if (erp_action) 2255 erp_action->fsf_req = NULL; 2256 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2257 lock_flags); 2258 return retval; 2259 } 2260 2261 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 2262 2263 if (!erp_action) { 2264 wait_event(fsf_req->completion_wq, 2265 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 2266 zfcp_fsf_req_free(fsf_req); 2267 } 2268 return retval; 2269 } 2270 2271 /** 2272 * zfcp_fsf_exchange_port_evaluate 2273 * @fsf_req: fsf_req which belongs to xchg port data request 2274 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) 2275 */ 2276 static void 2277 zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2278 { 2279 struct zfcp_adapter *adapter; 2280 struct fsf_qtcb *qtcb; 2281 struct fsf_qtcb_bottom_port *bottom, *data; 2282 struct Scsi_Host *shost; 2283 2284 adapter = fsf_req->adapter; 2285 qtcb = fsf_req->qtcb; 2286 bottom = &qtcb->bottom.port; 2287 shost = adapter->scsi_host; 2288 2289 data = (struct fsf_qtcb_bottom_port*) fsf_req->data; 2290 if (data) 2291 memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port)); 2292 2293 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) 2294 fc_host_permanent_port_name(shost) = bottom->wwpn; 2295 else 2296 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 2297 fc_host_maxframe_size(shost) = bottom->maximum_frame_size; 2298 fc_host_supported_speeds(shost) = bottom->supported_speed; 2299 } 2300 2301 /** 2302 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request 2303 * @fsf_req: pointer to struct zfcp_fsf_req 2304 */ 2305 static void 2306 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) 2307 { 2308 struct zfcp_adapter *adapter; 2309 struct fsf_qtcb *qtcb; 2310 2311 adapter = fsf_req->adapter; 2312 qtcb = fsf_req->qtcb; 2313 2314 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2315 return; 2316 2317 switch (qtcb->header.fsf_status) { 2318 case FSF_GOOD: 2319 zfcp_fsf_exchange_port_evaluate(fsf_req, 1); 2320 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); 2321 break; 2322 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2323 zfcp_fsf_exchange_port_evaluate(fsf_req, 0); 2324 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); 2325 zfcp_fsf_link_down_info_eval(adapter, 2326 &qtcb->header.fsf_status_qual.link_down_info); 2327 break; 2328 default: 2329 debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng"); 2330 debug_event(adapter->erp_dbf, 0, 2331 &fsf_req->qtcb->header.fsf_status, sizeof(u32)); 2332 } 2333 } 2334 2335 2336 /* 2337 * function: zfcp_fsf_open_port 2338 * 2339 * purpose: 2340 * 2341 * returns: address of initiated FSF request 2342 * NULL - request could not be initiated 2343 */ 2344 int 2345 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 2346 { 2347 volatile struct qdio_buffer_element *sbale; 2348 struct zfcp_fsf_req *fsf_req; 2349 unsigned long lock_flags; 2350 int retval = 0; 2351 2352 /* setup new FSF request */ 2353 retval = zfcp_fsf_req_create(erp_action->adapter, 2354 FSF_QTCB_OPEN_PORT_WITH_DID, 2355 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2356 erp_action->adapter->pool.fsf_req_erp, 2357 &lock_flags, &fsf_req); 2358 if (retval < 0) { 2359 ZFCP_LOG_INFO("error: Could not create open port request " 2360 "for port 0x%016Lx on adapter %s.\n", 2361 erp_action->port->wwpn, 2362 zfcp_get_busid_by_adapter(erp_action->adapter)); 2363 goto out; 2364 } 2365 2366 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2367 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2368 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2369 2370 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; 2371 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); 2372 fsf_req->data = (unsigned long) erp_action->port; 2373 fsf_req->erp_action = erp_action; 2374 erp_action->fsf_req = fsf_req; 2375 2376 zfcp_erp_start_timer(fsf_req); 2377 retval = zfcp_fsf_req_send(fsf_req); 2378 if (retval) { 2379 ZFCP_LOG_INFO("error: Could not send open port request for " 2380 "port 0x%016Lx on adapter %s.\n", 2381 erp_action->port->wwpn, 2382 zfcp_get_busid_by_adapter(erp_action->adapter)); 2383 zfcp_fsf_req_free(fsf_req); 2384 erp_action->fsf_req = NULL; 2385 goto out; 2386 } 2387 2388 ZFCP_LOG_DEBUG("open port request initiated " 2389 "(adapter %s, port 0x%016Lx)\n", 2390 zfcp_get_busid_by_adapter(erp_action->adapter), 2391 erp_action->port->wwpn); 2392 out: 2393 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2394 lock_flags); 2395 return retval; 2396 } 2397 2398 /* 2399 * function: zfcp_fsf_open_port_handler 2400 * 2401 * purpose: is called for finished Open Port command 2402 * 2403 * returns: 2404 */ 2405 static int 2406 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) 2407 { 2408 int retval = -EINVAL; 2409 struct zfcp_port *port; 2410 struct fsf_plogi *plogi; 2411 struct fsf_qtcb_header *header; 2412 u16 subtable, rule, counter; 2413 2414 port = (struct zfcp_port *) fsf_req->data; 2415 header = &fsf_req->qtcb->header; 2416 2417 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2418 /* don't change port status in our bookkeeping */ 2419 goto skip_fsfstatus; 2420 } 2421 2422 /* evaluate FSF status in QTCB */ 2423 switch (header->fsf_status) { 2424 2425 case FSF_PORT_ALREADY_OPEN: 2426 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " 2427 "is already open.\n", 2428 port->wwpn, zfcp_get_busid_by_port(port)); 2429 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2430 "fsf_s_popen"); 2431 /* 2432 * This is a bug, however operation should continue normally 2433 * if it is simply ignored 2434 */ 2435 break; 2436 2437 case FSF_ACCESS_DENIED: 2438 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " 2439 "on adapter %s\n", 2440 port->wwpn, zfcp_get_busid_by_port(port)); 2441 for (counter = 0; counter < 2; counter++) { 2442 subtable = header->fsf_status_qual.halfword[counter * 2]; 2443 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2444 switch (subtable) { 2445 case FSF_SQ_CFDC_SUBTABLE_OS: 2446 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2447 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2448 case FSF_SQ_CFDC_SUBTABLE_LUN: 2449 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2450 zfcp_act_subtable_type[subtable], rule); 2451 break; 2452 } 2453 } 2454 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2455 zfcp_erp_port_access_denied(port); 2456 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2457 break; 2458 2459 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 2460 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " 2461 "The remote port 0x%016Lx on adapter %s " 2462 "could not be opened. Disabling it.\n", 2463 port->wwpn, zfcp_get_busid_by_port(port)); 2464 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2465 "fsf_s_max_ports"); 2466 zfcp_erp_port_failed(port); 2467 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2468 break; 2469 2470 case FSF_ADAPTER_STATUS_AVAILABLE: 2471 switch (header->fsf_status_qual.word[0]) { 2472 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2473 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2474 "fsf_sq_ltest"); 2475 /* ERP strategy will escalate */ 2476 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2477 break; 2478 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2479 /* ERP strategy will escalate */ 2480 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2481 "fsf_sq_ulp"); 2482 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2483 break; 2484 case FSF_SQ_NO_RETRY_POSSIBLE: 2485 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " 2486 "adapter %s could not be opened. " 2487 "Disabling it.\n", 2488 port->wwpn, 2489 zfcp_get_busid_by_port(port)); 2490 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2491 "fsf_sq_no_retry"); 2492 zfcp_erp_port_failed(port); 2493 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2494 break; 2495 default: 2496 ZFCP_LOG_NORMAL 2497 ("bug: Wrong status qualifier 0x%x arrived.\n", 2498 header->fsf_status_qual.word[0]); 2499 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2500 "fsf_sq_inval:"); 2501 debug_exception( 2502 fsf_req->adapter->erp_dbf, 0, 2503 &header->fsf_status_qual.word[0], 2504 sizeof (u32)); 2505 break; 2506 } 2507 break; 2508 2509 case FSF_GOOD: 2510 /* save port handle assigned by FSF */ 2511 port->handle = header->port_handle; 2512 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " 2513 "was opened, it's port handle is 0x%x\n", 2514 port->wwpn, zfcp_get_busid_by_port(port), 2515 port->handle); 2516 /* mark port as open */ 2517 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | 2518 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2519 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 2520 ZFCP_STATUS_COMMON_ACCESS_BOXED, 2521 &port->status); 2522 retval = 0; 2523 /* check whether D_ID has changed during open */ 2524 /* 2525 * FIXME: This check is not airtight, as the FCP channel does 2526 * not monitor closures of target port connections caused on 2527 * the remote side. Thus, they might miss out on invalidating 2528 * locally cached WWPNs (and other N_Port parameters) of gone 2529 * target ports. So, our heroic attempt to make things safe 2530 * could be undermined by 'open port' response data tagged with 2531 * obsolete WWPNs. Another reason to monitor potential 2532 * connection closures ourself at least (by interpreting 2533 * incoming ELS' and unsolicited status). It just crosses my 2534 * mind that one should be able to cross-check by means of 2535 * another GID_PN straight after a port has been opened. 2536 * Alternately, an ADISC/PDISC ELS should suffice, as well. 2537 */ 2538 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; 2539 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) 2540 { 2541 if (fsf_req->qtcb->bottom.support.els1_length < 2542 sizeof (struct fsf_plogi)) { 2543 ZFCP_LOG_INFO( 2544 "warning: insufficient length of " 2545 "PLOGI payload (%i)\n", 2546 fsf_req->qtcb->bottom.support.els1_length); 2547 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2548 "fsf_s_short_plogi:"); 2549 /* skip sanity check and assume wwpn is ok */ 2550 } else { 2551 if (plogi->serv_param.wwpn != port->wwpn) { 2552 ZFCP_LOG_INFO("warning: d_id of port " 2553 "0x%016Lx changed during " 2554 "open\n", port->wwpn); 2555 debug_text_event( 2556 fsf_req->adapter->erp_dbf, 0, 2557 "fsf_s_did_change:"); 2558 atomic_clear_mask( 2559 ZFCP_STATUS_PORT_DID_DID, 2560 &port->status); 2561 } else { 2562 port->wwnn = plogi->serv_param.wwnn; 2563 zfcp_plogi_evaluate(port, plogi); 2564 } 2565 } 2566 } 2567 break; 2568 2569 case FSF_UNKNOWN_OP_SUBTYPE: 2570 /* should never occure, subtype not set in zfcp_fsf_open_port */ 2571 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " 2572 "op_subtype=0x%x)\n", 2573 zfcp_get_busid_by_port(port), 2574 fsf_req->qtcb->bottom.support.operation_subtype); 2575 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2576 break; 2577 2578 default: 2579 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2580 "(debug info 0x%x)\n", 2581 header->fsf_status); 2582 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2583 debug_exception(fsf_req->adapter->erp_dbf, 0, 2584 &header->fsf_status, sizeof (u32)); 2585 break; 2586 } 2587 2588 skip_fsfstatus: 2589 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); 2590 return retval; 2591 } 2592 2593 /* 2594 * function: zfcp_fsf_close_port 2595 * 2596 * purpose: submit FSF command "close port" 2597 * 2598 * returns: address of initiated FSF request 2599 * NULL - request could not be initiated 2600 */ 2601 int 2602 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 2603 { 2604 volatile struct qdio_buffer_element *sbale; 2605 struct zfcp_fsf_req *fsf_req; 2606 unsigned long lock_flags; 2607 int retval = 0; 2608 2609 /* setup new FSF request */ 2610 retval = zfcp_fsf_req_create(erp_action->adapter, 2611 FSF_QTCB_CLOSE_PORT, 2612 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2613 erp_action->adapter->pool.fsf_req_erp, 2614 &lock_flags, &fsf_req); 2615 if (retval < 0) { 2616 ZFCP_LOG_INFO("error: Could not create a close port request " 2617 "for port 0x%016Lx on adapter %s.\n", 2618 erp_action->port->wwpn, 2619 zfcp_get_busid_by_adapter(erp_action->adapter)); 2620 goto out; 2621 } 2622 2623 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2624 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2625 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2626 2627 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); 2628 fsf_req->data = (unsigned long) erp_action->port; 2629 fsf_req->erp_action = erp_action; 2630 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 2631 fsf_req->erp_action = erp_action; 2632 erp_action->fsf_req = fsf_req; 2633 2634 zfcp_erp_start_timer(fsf_req); 2635 retval = zfcp_fsf_req_send(fsf_req); 2636 if (retval) { 2637 ZFCP_LOG_INFO("error: Could not send a close port request for " 2638 "port 0x%016Lx on adapter %s.\n", 2639 erp_action->port->wwpn, 2640 zfcp_get_busid_by_adapter(erp_action->adapter)); 2641 zfcp_fsf_req_free(fsf_req); 2642 erp_action->fsf_req = NULL; 2643 goto out; 2644 } 2645 2646 ZFCP_LOG_TRACE("close port request initiated " 2647 "(adapter %s, port 0x%016Lx)\n", 2648 zfcp_get_busid_by_adapter(erp_action->adapter), 2649 erp_action->port->wwpn); 2650 out: 2651 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2652 lock_flags); 2653 return retval; 2654 } 2655 2656 /* 2657 * function: zfcp_fsf_close_port_handler 2658 * 2659 * purpose: is called for finished Close Port FSF command 2660 * 2661 * returns: 2662 */ 2663 static int 2664 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) 2665 { 2666 int retval = -EINVAL; 2667 struct zfcp_port *port; 2668 2669 port = (struct zfcp_port *) fsf_req->data; 2670 2671 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2672 /* don't change port status in our bookkeeping */ 2673 goto skip_fsfstatus; 2674 } 2675 2676 /* evaluate FSF status in QTCB */ 2677 switch (fsf_req->qtcb->header.fsf_status) { 2678 2679 case FSF_PORT_HANDLE_NOT_VALID: 2680 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 2681 "0x%016Lx on adapter %s invalid. This may happen " 2682 "occasionally.\n", port->handle, 2683 port->wwpn, zfcp_get_busid_by_port(port)); 2684 ZFCP_LOG_DEBUG("status qualifier:\n"); 2685 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2686 (char *) &fsf_req->qtcb->header.fsf_status_qual, 2687 sizeof (union fsf_status_qual)); 2688 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2689 "fsf_s_phand_nv"); 2690 zfcp_erp_adapter_reopen(port->adapter, 0); 2691 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2692 break; 2693 2694 case FSF_ADAPTER_STATUS_AVAILABLE: 2695 /* Note: FSF has actually closed the port in this case. 2696 * The status code is just daft. Fingers crossed for a change 2697 */ 2698 retval = 0; 2699 break; 2700 2701 case FSF_GOOD: 2702 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " 2703 "port handle 0x%x\n", port->wwpn, 2704 zfcp_get_busid_by_port(port), port->handle); 2705 zfcp_erp_modify_port_status(port, 2706 ZFCP_STATUS_COMMON_OPEN, 2707 ZFCP_CLEAR); 2708 retval = 0; 2709 break; 2710 2711 default: 2712 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2713 "(debug info 0x%x)\n", 2714 fsf_req->qtcb->header.fsf_status); 2715 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2716 debug_exception(fsf_req->adapter->erp_dbf, 0, 2717 &fsf_req->qtcb->header.fsf_status, 2718 sizeof (u32)); 2719 break; 2720 } 2721 2722 skip_fsfstatus: 2723 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); 2724 return retval; 2725 } 2726 2727 /* 2728 * function: zfcp_fsf_close_physical_port 2729 * 2730 * purpose: submit FSF command "close physical port" 2731 * 2732 * returns: address of initiated FSF request 2733 * NULL - request could not be initiated 2734 */ 2735 int 2736 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 2737 { 2738 volatile struct qdio_buffer_element *sbale; 2739 struct zfcp_fsf_req *fsf_req; 2740 unsigned long lock_flags; 2741 int retval = 0; 2742 2743 /* setup new FSF request */ 2744 retval = zfcp_fsf_req_create(erp_action->adapter, 2745 FSF_QTCB_CLOSE_PHYSICAL_PORT, 2746 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2747 erp_action->adapter->pool.fsf_req_erp, 2748 &lock_flags, &fsf_req); 2749 if (retval < 0) { 2750 ZFCP_LOG_INFO("error: Could not create close physical port " 2751 "request (adapter %s, port 0x%016Lx)\n", 2752 zfcp_get_busid_by_adapter(erp_action->adapter), 2753 erp_action->port->wwpn); 2754 2755 goto out; 2756 } 2757 2758 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2759 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2760 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2761 2762 /* mark port as being closed */ 2763 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, 2764 &erp_action->port->status); 2765 /* save a pointer to this port */ 2766 fsf_req->data = (unsigned long) erp_action->port; 2767 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 2768 fsf_req->erp_action = erp_action; 2769 erp_action->fsf_req = fsf_req; 2770 2771 zfcp_erp_start_timer(fsf_req); 2772 retval = zfcp_fsf_req_send(fsf_req); 2773 if (retval) { 2774 ZFCP_LOG_INFO("error: Could not send close physical port " 2775 "request (adapter %s, port 0x%016Lx)\n", 2776 zfcp_get_busid_by_adapter(erp_action->adapter), 2777 erp_action->port->wwpn); 2778 zfcp_fsf_req_free(fsf_req); 2779 erp_action->fsf_req = NULL; 2780 goto out; 2781 } 2782 2783 ZFCP_LOG_TRACE("close physical port request initiated " 2784 "(adapter %s, port 0x%016Lx)\n", 2785 zfcp_get_busid_by_adapter(erp_action->adapter), 2786 erp_action->port->wwpn); 2787 out: 2788 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2789 lock_flags); 2790 return retval; 2791 } 2792 2793 /* 2794 * function: zfcp_fsf_close_physical_port_handler 2795 * 2796 * purpose: is called for finished Close Physical Port FSF command 2797 * 2798 * returns: 2799 */ 2800 static int 2801 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) 2802 { 2803 int retval = -EINVAL; 2804 struct zfcp_port *port; 2805 struct zfcp_unit *unit; 2806 struct fsf_qtcb_header *header; 2807 u16 subtable, rule, counter; 2808 2809 port = (struct zfcp_port *) fsf_req->data; 2810 header = &fsf_req->qtcb->header; 2811 2812 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2813 /* don't change port status in our bookkeeping */ 2814 goto skip_fsfstatus; 2815 } 2816 2817 /* evaluate FSF status in QTCB */ 2818 switch (header->fsf_status) { 2819 2820 case FSF_PORT_HANDLE_NOT_VALID: 2821 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" 2822 "(adapter %s, port 0x%016Lx). " 2823 "This may happen occasionally.\n", 2824 port->handle, 2825 zfcp_get_busid_by_port(port), 2826 port->wwpn); 2827 ZFCP_LOG_DEBUG("status qualifier:\n"); 2828 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2829 (char *) &header->fsf_status_qual, 2830 sizeof (union fsf_status_qual)); 2831 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2832 "fsf_s_phand_nv"); 2833 zfcp_erp_adapter_reopen(port->adapter, 0); 2834 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2835 break; 2836 2837 case FSF_ACCESS_DENIED: 2838 ZFCP_LOG_NORMAL("Access denied, cannot close " 2839 "physical port 0x%016Lx on adapter %s\n", 2840 port->wwpn, zfcp_get_busid_by_port(port)); 2841 for (counter = 0; counter < 2; counter++) { 2842 subtable = header->fsf_status_qual.halfword[counter * 2]; 2843 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2844 switch (subtable) { 2845 case FSF_SQ_CFDC_SUBTABLE_OS: 2846 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2847 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2848 case FSF_SQ_CFDC_SUBTABLE_LUN: 2849 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2850 zfcp_act_subtable_type[subtable], rule); 2851 break; 2852 } 2853 } 2854 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2855 zfcp_erp_port_access_denied(port); 2856 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2857 break; 2858 2859 case FSF_PORT_BOXED: 2860 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " 2861 "%s needs to be reopened but it was attempted " 2862 "to close it physically.\n", 2863 port->wwpn, 2864 zfcp_get_busid_by_port(port)); 2865 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); 2866 zfcp_erp_port_boxed(port); 2867 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2868 ZFCP_STATUS_FSFREQ_RETRY; 2869 break; 2870 2871 case FSF_ADAPTER_STATUS_AVAILABLE: 2872 switch (header->fsf_status_qual.word[0]) { 2873 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2874 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2875 "fsf_sq_ltest"); 2876 /* This will now be escalated by ERP */ 2877 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2878 break; 2879 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2880 /* ERP strategy will escalate */ 2881 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2882 "fsf_sq_ulp"); 2883 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2884 break; 2885 default: 2886 ZFCP_LOG_NORMAL 2887 ("bug: Wrong status qualifier 0x%x arrived.\n", 2888 header->fsf_status_qual.word[0]); 2889 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2890 "fsf_sq_inval:"); 2891 debug_exception( 2892 fsf_req->adapter->erp_dbf, 0, 2893 &header->fsf_status_qual.word[0], sizeof (u32)); 2894 break; 2895 } 2896 break; 2897 2898 case FSF_GOOD: 2899 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " 2900 "physically closed, port handle 0x%x\n", 2901 port->wwpn, 2902 zfcp_get_busid_by_port(port), port->handle); 2903 /* can't use generic zfcp_erp_modify_port_status because 2904 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 2905 */ 2906 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2907 list_for_each_entry(unit, &port->unit_list_head, list) 2908 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 2909 retval = 0; 2910 break; 2911 2912 default: 2913 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2914 "(debug info 0x%x)\n", 2915 header->fsf_status); 2916 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2917 debug_exception(fsf_req->adapter->erp_dbf, 0, 2918 &header->fsf_status, sizeof (u32)); 2919 break; 2920 } 2921 2922 skip_fsfstatus: 2923 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); 2924 return retval; 2925 } 2926 2927 /* 2928 * function: zfcp_fsf_open_unit 2929 * 2930 * purpose: 2931 * 2932 * returns: 2933 * 2934 * assumptions: This routine does not check whether the associated 2935 * remote port has already been opened. This should be 2936 * done by calling routines. Otherwise some status 2937 * may be presented by FSF 2938 */ 2939 int 2940 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 2941 { 2942 volatile struct qdio_buffer_element *sbale; 2943 struct zfcp_fsf_req *fsf_req; 2944 unsigned long lock_flags; 2945 int retval = 0; 2946 2947 /* setup new FSF request */ 2948 retval = zfcp_fsf_req_create(erp_action->adapter, 2949 FSF_QTCB_OPEN_LUN, 2950 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2951 erp_action->adapter->pool.fsf_req_erp, 2952 &lock_flags, &fsf_req); 2953 if (retval < 0) { 2954 ZFCP_LOG_INFO("error: Could not create open unit request for " 2955 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 2956 erp_action->unit->fcp_lun, 2957 erp_action->unit->port->wwpn, 2958 zfcp_get_busid_by_adapter(erp_action->adapter)); 2959 goto out; 2960 } 2961 2962 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2963 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2964 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2965 2966 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 2967 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; 2968 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) 2969 fsf_req->qtcb->bottom.support.option = 2970 FSF_OPEN_LUN_SUPPRESS_BOXING; 2971 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); 2972 fsf_req->data = (unsigned long) erp_action->unit; 2973 fsf_req->erp_action = erp_action; 2974 erp_action->fsf_req = fsf_req; 2975 2976 zfcp_erp_start_timer(fsf_req); 2977 retval = zfcp_fsf_req_send(erp_action->fsf_req); 2978 if (retval) { 2979 ZFCP_LOG_INFO("error: Could not send an open unit request " 2980 "on the adapter %s, port 0x%016Lx for " 2981 "unit 0x%016Lx\n", 2982 zfcp_get_busid_by_adapter(erp_action->adapter), 2983 erp_action->port->wwpn, 2984 erp_action->unit->fcp_lun); 2985 zfcp_fsf_req_free(fsf_req); 2986 erp_action->fsf_req = NULL; 2987 goto out; 2988 } 2989 2990 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " 2991 "port 0x%016Lx, unit 0x%016Lx)\n", 2992 zfcp_get_busid_by_adapter(erp_action->adapter), 2993 erp_action->port->wwpn, erp_action->unit->fcp_lun); 2994 out: 2995 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2996 lock_flags); 2997 return retval; 2998 } 2999 3000 /* 3001 * function: zfcp_fsf_open_unit_handler 3002 * 3003 * purpose: is called for finished Open LUN command 3004 * 3005 * returns: 3006 */ 3007 static int 3008 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) 3009 { 3010 int retval = -EINVAL; 3011 struct zfcp_adapter *adapter; 3012 struct zfcp_unit *unit; 3013 struct fsf_qtcb_header *header; 3014 struct fsf_qtcb_bottom_support *bottom; 3015 struct fsf_queue_designator *queue_designator; 3016 u16 subtable, rule, counter; 3017 int exclusive, readwrite; 3018 3019 unit = (struct zfcp_unit *) fsf_req->data; 3020 3021 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3022 /* don't change unit status in our bookkeeping */ 3023 goto skip_fsfstatus; 3024 } 3025 3026 adapter = fsf_req->adapter; 3027 header = &fsf_req->qtcb->header; 3028 bottom = &fsf_req->qtcb->bottom.support; 3029 queue_designator = &header->fsf_status_qual.fsf_queue_designator; 3030 3031 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 3032 ZFCP_STATUS_COMMON_ACCESS_BOXED | 3033 ZFCP_STATUS_UNIT_SHARED | 3034 ZFCP_STATUS_UNIT_READONLY, 3035 &unit->status); 3036 3037 /* evaluate FSF status in QTCB */ 3038 switch (header->fsf_status) { 3039 3040 case FSF_PORT_HANDLE_NOT_VALID: 3041 ZFCP_LOG_INFO("Temporary port identifier 0x%x " 3042 "for port 0x%016Lx on adapter %s invalid " 3043 "This may happen occasionally\n", 3044 unit->port->handle, 3045 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3046 ZFCP_LOG_DEBUG("status qualifier:\n"); 3047 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3048 (char *) &header->fsf_status_qual, 3049 sizeof (union fsf_status_qual)); 3050 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); 3051 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3052 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3053 break; 3054 3055 case FSF_LUN_ALREADY_OPEN: 3056 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " 3057 "remote port 0x%016Lx on adapter %s twice.\n", 3058 unit->fcp_lun, 3059 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3060 debug_text_exception(adapter->erp_dbf, 0, 3061 "fsf_s_uopen"); 3062 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3063 break; 3064 3065 case FSF_ACCESS_DENIED: 3066 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " 3067 "remote port 0x%016Lx on adapter %s\n", 3068 unit->fcp_lun, unit->port->wwpn, 3069 zfcp_get_busid_by_unit(unit)); 3070 for (counter = 0; counter < 2; counter++) { 3071 subtable = header->fsf_status_qual.halfword[counter * 2]; 3072 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3073 switch (subtable) { 3074 case FSF_SQ_CFDC_SUBTABLE_OS: 3075 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3076 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3077 case FSF_SQ_CFDC_SUBTABLE_LUN: 3078 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3079 zfcp_act_subtable_type[subtable], rule); 3080 break; 3081 } 3082 } 3083 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 3084 zfcp_erp_unit_access_denied(unit); 3085 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3086 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3087 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3088 break; 3089 3090 case FSF_PORT_BOXED: 3091 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3092 "needs to be reopened\n", 3093 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3094 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 3095 zfcp_erp_port_boxed(unit->port); 3096 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3097 ZFCP_STATUS_FSFREQ_RETRY; 3098 break; 3099 3100 case FSF_LUN_SHARING_VIOLATION: 3101 if (header->fsf_status_qual.word[0] != 0) { 3102 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " 3103 "with WWPN 0x%Lx " 3104 "connected to the adapter %s " 3105 "is already in use in LPAR%d, CSS%d\n", 3106 unit->fcp_lun, 3107 unit->port->wwpn, 3108 zfcp_get_busid_by_unit(unit), 3109 queue_designator->hla, 3110 queue_designator->cssid); 3111 } else { 3112 subtable = header->fsf_status_qual.halfword[4]; 3113 rule = header->fsf_status_qual.halfword[5]; 3114 switch (subtable) { 3115 case FSF_SQ_CFDC_SUBTABLE_OS: 3116 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3117 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3118 case FSF_SQ_CFDC_SUBTABLE_LUN: 3119 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " 3120 "remote port with WWPN 0x%Lx " 3121 "connected to the adapter %s " 3122 "is denied (%s rule %d)\n", 3123 unit->fcp_lun, 3124 unit->port->wwpn, 3125 zfcp_get_busid_by_unit(unit), 3126 zfcp_act_subtable_type[subtable], 3127 rule); 3128 break; 3129 } 3130 } 3131 ZFCP_LOG_DEBUG("status qualifier:\n"); 3132 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3133 (char *) &header->fsf_status_qual, 3134 sizeof (union fsf_status_qual)); 3135 debug_text_event(adapter->erp_dbf, 2, 3136 "fsf_s_l_sh_vio"); 3137 zfcp_erp_unit_access_denied(unit); 3138 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3139 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3140 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3141 break; 3142 3143 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 3144 ZFCP_LOG_INFO("error: The adapter ran out of resources. " 3145 "There is no handle (temporary port identifier) " 3146 "available for unit 0x%016Lx on port 0x%016Lx " 3147 "on adapter %s\n", 3148 unit->fcp_lun, 3149 unit->port->wwpn, 3150 zfcp_get_busid_by_unit(unit)); 3151 debug_text_event(adapter->erp_dbf, 1, 3152 "fsf_s_max_units"); 3153 zfcp_erp_unit_failed(unit); 3154 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3155 break; 3156 3157 case FSF_ADAPTER_STATUS_AVAILABLE: 3158 switch (header->fsf_status_qual.word[0]) { 3159 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3160 /* Re-establish link to port */ 3161 debug_text_event(adapter->erp_dbf, 1, 3162 "fsf_sq_ltest"); 3163 zfcp_test_link(unit->port); 3164 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3165 break; 3166 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3167 /* ERP strategy will escalate */ 3168 debug_text_event(adapter->erp_dbf, 1, 3169 "fsf_sq_ulp"); 3170 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3171 break; 3172 default: 3173 ZFCP_LOG_NORMAL 3174 ("bug: Wrong status qualifier 0x%x arrived.\n", 3175 header->fsf_status_qual.word[0]); 3176 debug_text_event(adapter->erp_dbf, 0, 3177 "fsf_sq_inval:"); 3178 debug_exception(adapter->erp_dbf, 0, 3179 &header->fsf_status_qual.word[0], 3180 sizeof (u32)); 3181 } 3182 break; 3183 3184 case FSF_INVALID_COMMAND_OPTION: 3185 ZFCP_LOG_NORMAL( 3186 "Invalid option 0x%x has been specified " 3187 "in QTCB bottom sent to the adapter %s\n", 3188 bottom->option, 3189 zfcp_get_busid_by_adapter(adapter)); 3190 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3191 retval = -EINVAL; 3192 break; 3193 3194 case FSF_GOOD: 3195 /* save LUN handle assigned by FSF */ 3196 unit->handle = header->lun_handle; 3197 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " 3198 "adapter %s opened, port handle 0x%x\n", 3199 unit->fcp_lun, 3200 unit->port->wwpn, 3201 zfcp_get_busid_by_unit(unit), 3202 unit->handle); 3203 /* mark unit as open */ 3204 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3205 3206 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && 3207 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && 3208 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) { 3209 exclusive = (bottom->lun_access_info & 3210 FSF_UNIT_ACCESS_EXCLUSIVE); 3211 readwrite = (bottom->lun_access_info & 3212 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER); 3213 3214 if (!exclusive) 3215 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, 3216 &unit->status); 3217 3218 if (!readwrite) { 3219 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, 3220 &unit->status); 3221 ZFCP_LOG_NORMAL("read-only access for unit " 3222 "(adapter %s, wwpn=0x%016Lx, " 3223 "fcp_lun=0x%016Lx)\n", 3224 zfcp_get_busid_by_unit(unit), 3225 unit->port->wwpn, 3226 unit->fcp_lun); 3227 } 3228 3229 if (exclusive && !readwrite) { 3230 ZFCP_LOG_NORMAL("exclusive access of read-only " 3231 "unit not supported\n"); 3232 zfcp_erp_unit_failed(unit); 3233 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3234 zfcp_erp_unit_shutdown(unit, 0); 3235 } else if (!exclusive && readwrite) { 3236 ZFCP_LOG_NORMAL("shared access of read-write " 3237 "unit not supported\n"); 3238 zfcp_erp_unit_failed(unit); 3239 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3240 zfcp_erp_unit_shutdown(unit, 0); 3241 } 3242 } 3243 3244 retval = 0; 3245 break; 3246 3247 default: 3248 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3249 "(debug info 0x%x)\n", 3250 header->fsf_status); 3251 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); 3252 debug_exception(adapter->erp_dbf, 0, 3253 &header->fsf_status, sizeof (u32)); 3254 break; 3255 } 3256 3257 skip_fsfstatus: 3258 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); 3259 return retval; 3260 } 3261 3262 /* 3263 * function: zfcp_fsf_close_unit 3264 * 3265 * purpose: 3266 * 3267 * returns: address of fsf_req - request successfully initiated 3268 * NULL - 3269 * 3270 * assumptions: This routine does not check whether the associated 3271 * remote port/lun has already been opened. This should be 3272 * done by calling routines. Otherwise some status 3273 * may be presented by FSF 3274 */ 3275 int 3276 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 3277 { 3278 volatile struct qdio_buffer_element *sbale; 3279 struct zfcp_fsf_req *fsf_req; 3280 unsigned long lock_flags; 3281 int retval = 0; 3282 3283 /* setup new FSF request */ 3284 retval = zfcp_fsf_req_create(erp_action->adapter, 3285 FSF_QTCB_CLOSE_LUN, 3286 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3287 erp_action->adapter->pool.fsf_req_erp, 3288 &lock_flags, &fsf_req); 3289 if (retval < 0) { 3290 ZFCP_LOG_INFO("error: Could not create close unit request for " 3291 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3292 erp_action->unit->fcp_lun, 3293 erp_action->port->wwpn, 3294 zfcp_get_busid_by_adapter(erp_action->adapter)); 3295 goto out; 3296 } 3297 3298 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3299 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3300 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3301 3302 fsf_req->qtcb->header.port_handle = erp_action->port->handle; 3303 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; 3304 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); 3305 fsf_req->data = (unsigned long) erp_action->unit; 3306 fsf_req->erp_action = erp_action; 3307 erp_action->fsf_req = fsf_req; 3308 3309 zfcp_erp_start_timer(fsf_req); 3310 retval = zfcp_fsf_req_send(erp_action->fsf_req); 3311 if (retval) { 3312 ZFCP_LOG_INFO("error: Could not send a close unit request for " 3313 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", 3314 erp_action->unit->fcp_lun, 3315 erp_action->port->wwpn, 3316 zfcp_get_busid_by_adapter(erp_action->adapter)); 3317 zfcp_fsf_req_free(fsf_req); 3318 erp_action->fsf_req = NULL; 3319 goto out; 3320 } 3321 3322 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " 3323 "port 0x%016Lx, unit 0x%016Lx)\n", 3324 zfcp_get_busid_by_adapter(erp_action->adapter), 3325 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3326 out: 3327 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3328 lock_flags); 3329 return retval; 3330 } 3331 3332 /* 3333 * function: zfcp_fsf_close_unit_handler 3334 * 3335 * purpose: is called for finished Close LUN FSF command 3336 * 3337 * returns: 3338 */ 3339 static int 3340 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) 3341 { 3342 int retval = -EINVAL; 3343 struct zfcp_unit *unit; 3344 3345 unit = (struct zfcp_unit *) fsf_req->data; 3346 3347 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3348 /* don't change unit status in our bookkeeping */ 3349 goto skip_fsfstatus; 3350 } 3351 3352 /* evaluate FSF status in QTCB */ 3353 switch (fsf_req->qtcb->header.fsf_status) { 3354 3355 case FSF_PORT_HANDLE_NOT_VALID: 3356 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3357 "0x%016Lx on adapter %s invalid. This may " 3358 "happen in rare circumstances\n", 3359 unit->port->handle, 3360 unit->port->wwpn, 3361 zfcp_get_busid_by_unit(unit)); 3362 ZFCP_LOG_DEBUG("status qualifier:\n"); 3363 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3364 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3365 sizeof (union fsf_status_qual)); 3366 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3367 "fsf_s_phand_nv"); 3368 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3369 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3370 break; 3371 3372 case FSF_LUN_HANDLE_NOT_VALID: 3373 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " 3374 "0x%016Lx on port 0x%016Lx on adapter %s is " 3375 "invalid. This may happen occasionally.\n", 3376 unit->handle, 3377 unit->fcp_lun, 3378 unit->port->wwpn, 3379 zfcp_get_busid_by_unit(unit)); 3380 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 3381 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3382 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3383 sizeof (union fsf_status_qual)); 3384 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3385 "fsf_s_lhand_nv"); 3386 zfcp_erp_port_reopen(unit->port, 0); 3387 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3388 break; 3389 3390 case FSF_PORT_BOXED: 3391 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3392 "needs to be reopened\n", 3393 unit->port->wwpn, 3394 zfcp_get_busid_by_unit(unit)); 3395 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3396 zfcp_erp_port_boxed(unit->port); 3397 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3398 ZFCP_STATUS_FSFREQ_RETRY; 3399 break; 3400 3401 case FSF_ADAPTER_STATUS_AVAILABLE: 3402 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 3403 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3404 /* re-establish link to port */ 3405 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3406 "fsf_sq_ltest"); 3407 zfcp_test_link(unit->port); 3408 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3409 break; 3410 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3411 /* ERP strategy will escalate */ 3412 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3413 "fsf_sq_ulp"); 3414 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3415 break; 3416 default: 3417 ZFCP_LOG_NORMAL 3418 ("bug: Wrong status qualifier 0x%x arrived.\n", 3419 fsf_req->qtcb->header.fsf_status_qual.word[0]); 3420 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3421 "fsf_sq_inval:"); 3422 debug_exception( 3423 fsf_req->adapter->erp_dbf, 0, 3424 &fsf_req->qtcb->header.fsf_status_qual.word[0], 3425 sizeof (u32)); 3426 break; 3427 } 3428 break; 3429 3430 case FSF_GOOD: 3431 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " 3432 "closed, port handle 0x%x\n", 3433 unit->fcp_lun, 3434 unit->port->wwpn, 3435 zfcp_get_busid_by_unit(unit), 3436 unit->handle); 3437 /* mark unit as closed */ 3438 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3439 retval = 0; 3440 break; 3441 3442 default: 3443 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3444 "(debug info 0x%x)\n", 3445 fsf_req->qtcb->header.fsf_status); 3446 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3447 debug_exception(fsf_req->adapter->erp_dbf, 0, 3448 &fsf_req->qtcb->header.fsf_status, 3449 sizeof (u32)); 3450 break; 3451 } 3452 3453 skip_fsfstatus: 3454 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); 3455 return retval; 3456 } 3457 3458 /** 3459 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) 3460 * @adapter: adapter where scsi command is issued 3461 * @unit: unit where command is sent to 3462 * @scsi_cmnd: scsi command to be sent 3463 * @timer: timer to be started when request is initiated 3464 * @req_flags: flags for fsf_request 3465 */ 3466 int 3467 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, 3468 struct zfcp_unit *unit, 3469 struct scsi_cmnd * scsi_cmnd, 3470 int use_timer, int req_flags) 3471 { 3472 struct zfcp_fsf_req *fsf_req = NULL; 3473 struct fcp_cmnd_iu *fcp_cmnd_iu; 3474 unsigned int sbtype; 3475 unsigned long lock_flags; 3476 int real_bytes = 0; 3477 int retval = 0; 3478 int mask; 3479 3480 /* setup new FSF request */ 3481 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3482 adapter->pool.fsf_req_scsi, 3483 &lock_flags, &fsf_req); 3484 if (unlikely(retval < 0)) { 3485 ZFCP_LOG_DEBUG("error: Could not create FCP command request " 3486 "for unit 0x%016Lx on port 0x%016Lx on " 3487 "adapter %s\n", 3488 unit->fcp_lun, 3489 unit->port->wwpn, 3490 zfcp_get_busid_by_adapter(adapter)); 3491 goto failed_req_create; 3492 } 3493 3494 zfcp_unit_get(unit); 3495 fsf_req->unit = unit; 3496 3497 /* associate FSF request with SCSI request (for look up on abort) */ 3498 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id; 3499 3500 /* associate SCSI command with FSF request */ 3501 fsf_req->data = (unsigned long) scsi_cmnd; 3502 3503 /* set handles of unit and its parent port in QTCB */ 3504 fsf_req->qtcb->header.lun_handle = unit->handle; 3505 fsf_req->qtcb->header.port_handle = unit->port->handle; 3506 3507 /* FSF does not define the structure of the FCP_CMND IU */ 3508 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3509 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3510 3511 /* 3512 * set depending on data direction: 3513 * data direction bits in SBALE (SB Type) 3514 * data direction bits in QTCB 3515 * data direction bits in FCP_CMND IU 3516 */ 3517 switch (scsi_cmnd->sc_data_direction) { 3518 case DMA_NONE: 3519 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3520 /* 3521 * FIXME(qdio): 3522 * what is the correct type for commands 3523 * without 'real' data buffers? 3524 */ 3525 sbtype = SBAL_FLAGS0_TYPE_READ; 3526 break; 3527 case DMA_FROM_DEVICE: 3528 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; 3529 sbtype = SBAL_FLAGS0_TYPE_READ; 3530 fcp_cmnd_iu->rddata = 1; 3531 break; 3532 case DMA_TO_DEVICE: 3533 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; 3534 sbtype = SBAL_FLAGS0_TYPE_WRITE; 3535 fcp_cmnd_iu->wddata = 1; 3536 break; 3537 case DMA_BIDIRECTIONAL: 3538 default: 3539 /* 3540 * dummy, catch this condition earlier 3541 * in zfcp_scsi_queuecommand 3542 */ 3543 goto failed_scsi_cmnd; 3544 } 3545 3546 /* set FC service class in QTCB (3 per default) */ 3547 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; 3548 3549 /* set FCP_LUN in FCP_CMND IU in QTCB */ 3550 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3551 3552 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; 3553 3554 /* set task attributes in FCP_CMND IU in QTCB */ 3555 if (likely((scsi_cmnd->device->simple_tags) || 3556 (atomic_test_mask(mask, &unit->status)))) 3557 fcp_cmnd_iu->task_attribute = SIMPLE_Q; 3558 else 3559 fcp_cmnd_iu->task_attribute = UNTAGGED; 3560 3561 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ 3562 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { 3563 fcp_cmnd_iu->add_fcp_cdb_length 3564 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; 3565 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " 3566 "additional FCP_CDB length is 0x%x " 3567 "(shifted right 2 bits)\n", 3568 scsi_cmnd->cmd_len, 3569 fcp_cmnd_iu->add_fcp_cdb_length); 3570 } 3571 /* 3572 * copy SCSI CDB (including additional length, if any) to 3573 * FCP_CDB in FCP_CMND IU in QTCB 3574 */ 3575 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3576 3577 /* FCP CMND IU length in QTCB */ 3578 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3579 sizeof (struct fcp_cmnd_iu) + 3580 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); 3581 3582 /* generate SBALEs from data buffer */ 3583 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); 3584 if (unlikely(real_bytes < 0)) { 3585 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { 3586 ZFCP_LOG_DEBUG( 3587 "Data did not fit into available buffer(s), " 3588 "waiting for more...\n"); 3589 retval = -EIO; 3590 } else { 3591 ZFCP_LOG_NORMAL("error: No truncation implemented but " 3592 "required. Shutting down unit " 3593 "(adapter %s, port 0x%016Lx, " 3594 "unit 0x%016Lx)\n", 3595 zfcp_get_busid_by_unit(unit), 3596 unit->port->wwpn, 3597 unit->fcp_lun); 3598 zfcp_erp_unit_shutdown(unit, 0); 3599 retval = -EINVAL; 3600 } 3601 goto no_fit; 3602 } 3603 3604 /* set length of FCP data length in FCP_CMND IU in QTCB */ 3605 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); 3606 3607 ZFCP_LOG_DEBUG("Sending SCSI command:\n"); 3608 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3609 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3610 3611 if (use_timer) 3612 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 3613 3614 retval = zfcp_fsf_req_send(fsf_req); 3615 if (unlikely(retval < 0)) { 3616 ZFCP_LOG_INFO("error: Could not send FCP command request " 3617 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 3618 zfcp_get_busid_by_adapter(adapter), 3619 unit->port->wwpn, 3620 unit->fcp_lun); 3621 goto send_failed; 3622 } 3623 3624 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " 3625 "port 0x%016Lx, unit 0x%016Lx)\n", 3626 zfcp_get_busid_by_adapter(adapter), 3627 unit->port->wwpn, 3628 unit->fcp_lun); 3629 goto success; 3630 3631 send_failed: 3632 no_fit: 3633 failed_scsi_cmnd: 3634 zfcp_unit_put(unit); 3635 zfcp_fsf_req_free(fsf_req); 3636 fsf_req = NULL; 3637 scsi_cmnd->host_scribble = NULL; 3638 success: 3639 failed_req_create: 3640 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3641 return retval; 3642 } 3643 3644 struct zfcp_fsf_req * 3645 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, 3646 struct zfcp_unit *unit, 3647 u8 tm_flags, int req_flags) 3648 { 3649 struct zfcp_fsf_req *fsf_req = NULL; 3650 int retval = 0; 3651 struct fcp_cmnd_iu *fcp_cmnd_iu; 3652 unsigned long lock_flags; 3653 volatile struct qdio_buffer_element *sbale; 3654 3655 /* setup new FSF request */ 3656 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3657 adapter->pool.fsf_req_scsi, 3658 &lock_flags, &fsf_req); 3659 if (retval < 0) { 3660 ZFCP_LOG_INFO("error: Could not create FCP command (task " 3661 "management) request for adapter %s, port " 3662 " 0x%016Lx, unit 0x%016Lx.\n", 3663 zfcp_get_busid_by_adapter(adapter), 3664 unit->port->wwpn, unit->fcp_lun); 3665 goto out; 3666 } 3667 3668 /* 3669 * Used to decide on proper handler in the return path, 3670 * could be either zfcp_fsf_send_fcp_command_task_handler or 3671 * zfcp_fsf_send_fcp_command_task_management_handler */ 3672 3673 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; 3674 3675 /* 3676 * hold a pointer to the unit being target of this 3677 * task management request 3678 */ 3679 fsf_req->data = (unsigned long) unit; 3680 3681 /* set FSF related fields in QTCB */ 3682 fsf_req->qtcb->header.lun_handle = unit->handle; 3683 fsf_req->qtcb->header.port_handle = unit->port->handle; 3684 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3685 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; 3686 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3687 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); 3688 3689 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3690 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; 3691 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3692 3693 /* set FCP related fields in FCP_CMND IU in QTCB */ 3694 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3695 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3696 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3697 fcp_cmnd_iu->task_management_flags = tm_flags; 3698 3699 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); 3700 retval = zfcp_fsf_req_send(fsf_req); 3701 if (retval) { 3702 ZFCP_LOG_INFO("error: Could not send an FCP-command (task " 3703 "management) on adapter %s, port 0x%016Lx for " 3704 "unit LUN 0x%016Lx\n", 3705 zfcp_get_busid_by_adapter(adapter), 3706 unit->port->wwpn, 3707 unit->fcp_lun); 3708 zfcp_fsf_req_free(fsf_req); 3709 fsf_req = NULL; 3710 goto out; 3711 } 3712 3713 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " 3714 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " 3715 "tm_flags=0x%x)\n", 3716 zfcp_get_busid_by_adapter(adapter), 3717 unit->port->wwpn, 3718 unit->fcp_lun, 3719 tm_flags); 3720 out: 3721 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3722 return fsf_req; 3723 } 3724 3725 /* 3726 * function: zfcp_fsf_send_fcp_command_handler 3727 * 3728 * purpose: is called for finished Send FCP Command 3729 * 3730 * returns: 3731 */ 3732 static int 3733 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 3734 { 3735 int retval = -EINVAL; 3736 struct zfcp_unit *unit; 3737 struct fsf_qtcb_header *header; 3738 u16 subtable, rule, counter; 3739 3740 header = &fsf_req->qtcb->header; 3741 3742 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) 3743 unit = (struct zfcp_unit *) fsf_req->data; 3744 else 3745 unit = fsf_req->unit; 3746 3747 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 3748 /* go directly to calls of special handlers */ 3749 goto skip_fsfstatus; 3750 } 3751 3752 /* evaluate FSF status in QTCB */ 3753 switch (header->fsf_status) { 3754 3755 case FSF_PORT_HANDLE_NOT_VALID: 3756 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3757 "0x%016Lx on adapter %s invalid\n", 3758 unit->port->handle, 3759 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3760 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3761 (char *) &header->fsf_status_qual, 3762 sizeof (union fsf_status_qual)); 3763 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3764 "fsf_s_phand_nv"); 3765 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3766 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3767 break; 3768 3769 case FSF_LUN_HANDLE_NOT_VALID: 3770 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " 3771 "0x%016Lx on port 0x%016Lx on adapter %s is " 3772 "invalid. This may happen occasionally.\n", 3773 unit->handle, 3774 unit->fcp_lun, 3775 unit->port->wwpn, 3776 zfcp_get_busid_by_unit(unit)); 3777 ZFCP_LOG_NORMAL("Status qualifier data:\n"); 3778 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3779 (char *) &header->fsf_status_qual, 3780 sizeof (union fsf_status_qual)); 3781 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3782 "fsf_s_uhand_nv"); 3783 zfcp_erp_port_reopen(unit->port, 0); 3784 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3785 break; 3786 3787 case FSF_HANDLE_MISMATCH: 3788 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " 3789 "unexpectedly. (adapter %s, port 0x%016Lx, " 3790 "unit 0x%016Lx)\n", 3791 unit->port->handle, 3792 zfcp_get_busid_by_unit(unit), 3793 unit->port->wwpn, 3794 unit->fcp_lun); 3795 ZFCP_LOG_NORMAL("status qualifier:\n"); 3796 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3797 (char *) &header->fsf_status_qual, 3798 sizeof (union fsf_status_qual)); 3799 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3800 "fsf_s_hand_mis"); 3801 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3802 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3803 break; 3804 3805 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 3806 ZFCP_LOG_INFO("error: adapter %s does not support fc " 3807 "class %d.\n", 3808 zfcp_get_busid_by_unit(unit), 3809 ZFCP_FC_SERVICE_CLASS_DEFAULT); 3810 /* stop operation for this adapter */ 3811 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 3812 "fsf_s_class_nsup"); 3813 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3814 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3815 break; 3816 3817 case FSF_FCPLUN_NOT_VALID: 3818 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " 3819 "adapter %s does not have correct unit " 3820 "handle 0x%x\n", 3821 unit->fcp_lun, 3822 unit->port->wwpn, 3823 zfcp_get_busid_by_unit(unit), 3824 unit->handle); 3825 ZFCP_LOG_DEBUG("status qualifier:\n"); 3826 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3827 (char *) &header->fsf_status_qual, 3828 sizeof (union fsf_status_qual)); 3829 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3830 "fsf_s_fcp_lun_nv"); 3831 zfcp_erp_port_reopen(unit->port, 0); 3832 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3833 break; 3834 3835 case FSF_ACCESS_DENIED: 3836 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " 3837 "unit 0x%016Lx on port 0x%016Lx on " 3838 "adapter %s\n", unit->fcp_lun, unit->port->wwpn, 3839 zfcp_get_busid_by_unit(unit)); 3840 for (counter = 0; counter < 2; counter++) { 3841 subtable = header->fsf_status_qual.halfword[counter * 2]; 3842 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3843 switch (subtable) { 3844 case FSF_SQ_CFDC_SUBTABLE_OS: 3845 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3846 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3847 case FSF_SQ_CFDC_SUBTABLE_LUN: 3848 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3849 zfcp_act_subtable_type[subtable], rule); 3850 break; 3851 } 3852 } 3853 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 3854 zfcp_erp_unit_access_denied(unit); 3855 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3856 break; 3857 3858 case FSF_DIRECTION_INDICATOR_NOT_VALID: 3859 ZFCP_LOG_INFO("bug: Invalid data direction given for unit " 3860 "0x%016Lx on port 0x%016Lx on adapter %s " 3861 "(debug info %d)\n", 3862 unit->fcp_lun, 3863 unit->port->wwpn, 3864 zfcp_get_busid_by_unit(unit), 3865 fsf_req->qtcb->bottom.io.data_direction); 3866 /* stop operation for this adapter */ 3867 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3868 "fsf_s_dir_ind_nv"); 3869 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3870 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3871 break; 3872 3873 case FSF_CMND_LENGTH_NOT_VALID: 3874 ZFCP_LOG_NORMAL 3875 ("bug: An invalid control-data-block length field " 3876 "was found in a command for unit 0x%016Lx on port " 3877 "0x%016Lx on adapter %s " "(debug info %d)\n", 3878 unit->fcp_lun, unit->port->wwpn, 3879 zfcp_get_busid_by_unit(unit), 3880 fsf_req->qtcb->bottom.io.fcp_cmnd_length); 3881 /* stop operation for this adapter */ 3882 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3883 "fsf_s_cmd_len_nv"); 3884 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3885 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3886 break; 3887 3888 case FSF_PORT_BOXED: 3889 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3890 "needs to be reopened\n", 3891 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3892 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3893 zfcp_erp_port_boxed(unit->port); 3894 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3895 ZFCP_STATUS_FSFREQ_RETRY; 3896 break; 3897 3898 case FSF_LUN_BOXED: 3899 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " 3900 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", 3901 zfcp_get_busid_by_unit(unit), 3902 unit->port->wwpn, unit->fcp_lun); 3903 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 3904 zfcp_erp_unit_boxed(unit); 3905 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 3906 | ZFCP_STATUS_FSFREQ_RETRY; 3907 break; 3908 3909 case FSF_ADAPTER_STATUS_AVAILABLE: 3910 switch (header->fsf_status_qual.word[0]) { 3911 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3912 /* re-establish link to port */ 3913 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3914 "fsf_sq_ltest"); 3915 zfcp_test_link(unit->port); 3916 break; 3917 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3918 /* FIXME(hw) need proper specs for proper action */ 3919 /* let scsi stack deal with retries and escalation */ 3920 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3921 "fsf_sq_ulp"); 3922 break; 3923 default: 3924 ZFCP_LOG_NORMAL 3925 ("Unknown status qualifier 0x%x arrived.\n", 3926 header->fsf_status_qual.word[0]); 3927 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3928 "fsf_sq_inval:"); 3929 debug_exception(fsf_req->adapter->erp_dbf, 0, 3930 &header->fsf_status_qual.word[0], 3931 sizeof(u32)); 3932 break; 3933 } 3934 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3935 break; 3936 3937 case FSF_GOOD: 3938 break; 3939 3940 case FSF_FCP_RSP_AVAILABLE: 3941 break; 3942 3943 default: 3944 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3945 debug_exception(fsf_req->adapter->erp_dbf, 0, 3946 &header->fsf_status, sizeof(u32)); 3947 break; 3948 } 3949 3950 skip_fsfstatus: 3951 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { 3952 retval = 3953 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); 3954 } else { 3955 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); 3956 fsf_req->unit = NULL; 3957 zfcp_unit_put(unit); 3958 } 3959 return retval; 3960 } 3961 3962 /* 3963 * function: zfcp_fsf_send_fcp_command_task_handler 3964 * 3965 * purpose: evaluates FCP_RSP IU 3966 * 3967 * returns: 3968 */ 3969 static int 3970 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) 3971 { 3972 int retval = 0; 3973 struct scsi_cmnd *scpnt; 3974 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 3975 &(fsf_req->qtcb->bottom.io.fcp_rsp); 3976 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3977 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3978 u32 sns_len; 3979 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 3980 unsigned long flags; 3981 struct zfcp_unit *unit = fsf_req->unit; 3982 3983 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); 3984 scpnt = (struct scsi_cmnd *) fsf_req->data; 3985 if (unlikely(!scpnt)) { 3986 ZFCP_LOG_DEBUG 3987 ("Command with fsf_req %p is not associated to " 3988 "a scsi command anymore. Aborted?\n", fsf_req); 3989 goto out; 3990 } 3991 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { 3992 /* FIXME: (design) mid-layer should handle DID_ABORT like 3993 * DID_SOFT_ERROR by retrying the request for devices 3994 * that allow retries. 3995 */ 3996 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); 3997 set_host_byte(&scpnt->result, DID_SOFT_ERROR); 3998 set_driver_byte(&scpnt->result, SUGGEST_RETRY); 3999 goto skip_fsfstatus; 4000 } 4001 4002 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 4003 ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); 4004 set_host_byte(&scpnt->result, DID_ERROR); 4005 goto skip_fsfstatus; 4006 } 4007 4008 /* set message byte of result in SCSI command */ 4009 scpnt->result |= COMMAND_COMPLETE << 8; 4010 4011 /* 4012 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte 4013 * of result in SCSI command 4014 */ 4015 scpnt->result |= fcp_rsp_iu->scsi_status; 4016 if (unlikely(fcp_rsp_iu->scsi_status)) { 4017 /* DEBUG */ 4018 ZFCP_LOG_DEBUG("status for SCSI Command:\n"); 4019 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4020 scpnt->cmnd, scpnt->cmd_len); 4021 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", 4022 fcp_rsp_iu->scsi_status); 4023 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4024 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); 4025 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4026 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), 4027 fcp_rsp_iu->fcp_sns_len); 4028 } 4029 4030 /* check FCP_RSP_INFO */ 4031 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { 4032 ZFCP_LOG_DEBUG("rsp_len is valid\n"); 4033 switch (fcp_rsp_info[3]) { 4034 case RSP_CODE_GOOD: 4035 /* ok, continue */ 4036 ZFCP_LOG_TRACE("no failure or Task Management " 4037 "Function complete\n"); 4038 set_host_byte(&scpnt->result, DID_OK); 4039 break; 4040 case RSP_CODE_LENGTH_MISMATCH: 4041 /* hardware bug */ 4042 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4043 "that the fibrechannel protocol data " 4044 "length differs from the burst length. " 4045 "The problem occured on unit 0x%016Lx " 4046 "on port 0x%016Lx on adapter %s", 4047 unit->fcp_lun, 4048 unit->port->wwpn, 4049 zfcp_get_busid_by_unit(unit)); 4050 /* dump SCSI CDB as prepared by zfcp */ 4051 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4052 (char *) &fsf_req->qtcb-> 4053 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4054 set_host_byte(&scpnt->result, DID_ERROR); 4055 goto skip_fsfstatus; 4056 case RSP_CODE_FIELD_INVALID: 4057 /* driver or hardware bug */ 4058 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4059 "that the fibrechannel protocol data " 4060 "fields were incorrectly set up. " 4061 "The problem occured on the unit " 4062 "0x%016Lx on port 0x%016Lx on " 4063 "adapter %s", 4064 unit->fcp_lun, 4065 unit->port->wwpn, 4066 zfcp_get_busid_by_unit(unit)); 4067 /* dump SCSI CDB as prepared by zfcp */ 4068 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4069 (char *) &fsf_req->qtcb-> 4070 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4071 set_host_byte(&scpnt->result, DID_ERROR); 4072 goto skip_fsfstatus; 4073 case RSP_CODE_RO_MISMATCH: 4074 /* hardware bug */ 4075 ZFCP_LOG_NORMAL("bug: The FCP response code indicates " 4076 "that conflicting values for the " 4077 "fibrechannel payload offset from the " 4078 "header were found. " 4079 "The problem occured on unit 0x%016Lx " 4080 "on port 0x%016Lx on adapter %s.\n", 4081 unit->fcp_lun, 4082 unit->port->wwpn, 4083 zfcp_get_busid_by_unit(unit)); 4084 /* dump SCSI CDB as prepared by zfcp */ 4085 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4086 (char *) &fsf_req->qtcb-> 4087 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4088 set_host_byte(&scpnt->result, DID_ERROR); 4089 goto skip_fsfstatus; 4090 default: 4091 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4092 "code was detected for a command. " 4093 "The problem occured on the unit " 4094 "0x%016Lx on port 0x%016Lx on " 4095 "adapter %s (debug info 0x%x)\n", 4096 unit->fcp_lun, 4097 unit->port->wwpn, 4098 zfcp_get_busid_by_unit(unit), 4099 fcp_rsp_info[3]); 4100 /* dump SCSI CDB as prepared by zfcp */ 4101 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4102 (char *) &fsf_req->qtcb-> 4103 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4104 set_host_byte(&scpnt->result, DID_ERROR); 4105 goto skip_fsfstatus; 4106 } 4107 } 4108 4109 /* check for sense data */ 4110 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { 4111 sns_len = FSF_FCP_RSP_SIZE - 4112 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; 4113 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", 4114 sns_len); 4115 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); 4116 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", 4117 SCSI_SENSE_BUFFERSIZE); 4118 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); 4119 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", 4120 scpnt->result); 4121 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4122 (void *) &scpnt->cmnd, scpnt->cmd_len); 4123 4124 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", 4125 fcp_rsp_iu->fcp_sns_len); 4126 memcpy(&scpnt->sense_buffer, 4127 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); 4128 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4129 (void *) &scpnt->sense_buffer, sns_len); 4130 } 4131 4132 /* check for overrun */ 4133 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { 4134 ZFCP_LOG_INFO("A data overrun was detected for a command. " 4135 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4136 "The response data length is " 4137 "%d, the original length was %d.\n", 4138 unit->fcp_lun, 4139 unit->port->wwpn, 4140 zfcp_get_busid_by_unit(unit), 4141 fcp_rsp_iu->fcp_resid, 4142 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4143 } 4144 4145 /* check for underrun */ 4146 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { 4147 ZFCP_LOG_INFO("A data underrun was detected for a command. " 4148 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4149 "The response data length is " 4150 "%d, the original length was %d.\n", 4151 unit->fcp_lun, 4152 unit->port->wwpn, 4153 zfcp_get_busid_by_unit(unit), 4154 fcp_rsp_iu->fcp_resid, 4155 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4156 4157 scpnt->resid = fcp_rsp_iu->fcp_resid; 4158 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) 4159 set_host_byte(&scpnt->result, DID_ERROR); 4160 } 4161 4162 skip_fsfstatus: 4163 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); 4164 4165 if (scpnt->result != 0) 4166 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); 4167 else if (scpnt->retries > 0) 4168 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); 4169 else 4170 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req); 4171 4172 /* cleanup pointer (need this especially for abort) */ 4173 scpnt->host_scribble = NULL; 4174 4175 /* always call back */ 4176 (scpnt->scsi_done) (scpnt); 4177 4178 /* 4179 * We must hold this lock until scsi_done has been called. 4180 * Otherwise we may call scsi_done after abort regarding this 4181 * command has completed. 4182 * Note: scsi_done must not block! 4183 */ 4184 out: 4185 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); 4186 return retval; 4187 } 4188 4189 /* 4190 * function: zfcp_fsf_send_fcp_command_task_management_handler 4191 * 4192 * purpose: evaluates FCP_RSP IU 4193 * 4194 * returns: 4195 */ 4196 static int 4197 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) 4198 { 4199 int retval = 0; 4200 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4201 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4202 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4203 struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data; 4204 4205 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4206 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4207 goto skip_fsfstatus; 4208 } 4209 4210 /* check FCP_RSP_INFO */ 4211 switch (fcp_rsp_info[3]) { 4212 case RSP_CODE_GOOD: 4213 /* ok, continue */ 4214 ZFCP_LOG_DEBUG("no failure or Task Management " 4215 "Function complete\n"); 4216 break; 4217 case RSP_CODE_TASKMAN_UNSUPP: 4218 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4219 "is not supported on the target device " 4220 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", 4221 unit->fcp_lun, 4222 unit->port->wwpn, 4223 zfcp_get_busid_by_unit(unit)); 4224 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; 4225 break; 4226 case RSP_CODE_TASKMAN_FAILED: 4227 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4228 "failed to complete successfully. " 4229 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", 4230 unit->fcp_lun, 4231 unit->port->wwpn, 4232 zfcp_get_busid_by_unit(unit)); 4233 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4234 break; 4235 default: 4236 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4237 "code was detected for a command. " 4238 "unit 0x%016Lx, port 0x%016Lx, adapter %s " 4239 "(debug info 0x%x)\n", 4240 unit->fcp_lun, 4241 unit->port->wwpn, 4242 zfcp_get_busid_by_unit(unit), 4243 fcp_rsp_info[3]); 4244 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4245 } 4246 4247 skip_fsfstatus: 4248 return retval; 4249 } 4250 4251 4252 /* 4253 * function: zfcp_fsf_control_file 4254 * 4255 * purpose: Initiator of the control file upload/download FSF requests 4256 * 4257 * returns: 0 - FSF request is successfuly created and queued 4258 * -EOPNOTSUPP - The FCP adapter does not have Control File support 4259 * -EINVAL - Invalid direction specified 4260 * -ENOMEM - Insufficient memory 4261 * -EPERM - Cannot create FSF request or place it in QDIO queue 4262 */ 4263 int 4264 zfcp_fsf_control_file(struct zfcp_adapter *adapter, 4265 struct zfcp_fsf_req **fsf_req_ptr, 4266 u32 fsf_command, 4267 u32 option, 4268 struct zfcp_sg_list *sg_list) 4269 { 4270 struct zfcp_fsf_req *fsf_req; 4271 struct fsf_qtcb_bottom_support *bottom; 4272 volatile struct qdio_buffer_element *sbale; 4273 unsigned long lock_flags; 4274 int req_flags = 0; 4275 int direction; 4276 int retval = 0; 4277 4278 if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) { 4279 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", 4280 zfcp_get_busid_by_adapter(adapter)); 4281 retval = -EOPNOTSUPP; 4282 goto out; 4283 } 4284 4285 switch (fsf_command) { 4286 4287 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 4288 direction = SBAL_FLAGS0_TYPE_WRITE; 4289 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && 4290 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) 4291 req_flags = ZFCP_WAIT_FOR_SBAL; 4292 break; 4293 4294 case FSF_QTCB_UPLOAD_CONTROL_FILE: 4295 direction = SBAL_FLAGS0_TYPE_READ; 4296 break; 4297 4298 default: 4299 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); 4300 retval = -EINVAL; 4301 goto out; 4302 } 4303 4304 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, 4305 NULL, &lock_flags, &fsf_req); 4306 if (retval < 0) { 4307 ZFCP_LOG_INFO("error: Could not create FSF request for the " 4308 "adapter %s\n", 4309 zfcp_get_busid_by_adapter(adapter)); 4310 retval = -EPERM; 4311 goto unlock_queue_lock; 4312 } 4313 4314 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4315 sbale[0].flags |= direction; 4316 4317 bottom = &fsf_req->qtcb->bottom.support; 4318 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; 4319 bottom->option = option; 4320 4321 if (sg_list->count > 0) { 4322 int bytes; 4323 4324 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, 4325 sg_list->sg, sg_list->count, 4326 ZFCP_MAX_SBALS_PER_REQ); 4327 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { 4328 ZFCP_LOG_INFO( 4329 "error: Could not create sufficient number of " 4330 "SBALS for an FSF request to the adapter %s\n", 4331 zfcp_get_busid_by_adapter(adapter)); 4332 retval = -ENOMEM; 4333 goto free_fsf_req; 4334 } 4335 } else 4336 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 4337 4338 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); 4339 retval = zfcp_fsf_req_send(fsf_req); 4340 if (retval < 0) { 4341 ZFCP_LOG_INFO("initiation of cfdc up/download failed" 4342 "(adapter %s)\n", 4343 zfcp_get_busid_by_adapter(adapter)); 4344 retval = -EPERM; 4345 goto free_fsf_req; 4346 } 4347 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4348 4349 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " 4350 "adapter %s\n", 4351 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? 4352 "download" : "upload", 4353 zfcp_get_busid_by_adapter(adapter)); 4354 4355 wait_event(fsf_req->completion_wq, 4356 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4357 4358 *fsf_req_ptr = fsf_req; 4359 goto out; 4360 4361 free_fsf_req: 4362 zfcp_fsf_req_free(fsf_req); 4363 unlock_queue_lock: 4364 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4365 out: 4366 return retval; 4367 } 4368 4369 4370 /* 4371 * function: zfcp_fsf_control_file_handler 4372 * 4373 * purpose: Handler of the control file upload/download FSF requests 4374 * 4375 * returns: 0 - FSF request successfuly processed 4376 * -EAGAIN - Operation has to be repeated because of a temporary problem 4377 * -EACCES - There is no permission to execute an operation 4378 * -EPERM - The control file is not in a right format 4379 * -EIO - There is a problem with the FCP adapter 4380 * -EINVAL - Invalid operation 4381 * -EFAULT - User space memory I/O operation fault 4382 */ 4383 static int 4384 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) 4385 { 4386 struct zfcp_adapter *adapter = fsf_req->adapter; 4387 struct fsf_qtcb_header *header = &fsf_req->qtcb->header; 4388 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; 4389 int retval = 0; 4390 4391 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4392 retval = -EINVAL; 4393 goto skip_fsfstatus; 4394 } 4395 4396 switch (header->fsf_status) { 4397 4398 case FSF_GOOD: 4399 ZFCP_LOG_NORMAL( 4400 "The FSF request has been successfully completed " 4401 "on the adapter %s\n", 4402 zfcp_get_busid_by_adapter(adapter)); 4403 break; 4404 4405 case FSF_OPERATION_PARTIALLY_SUCCESSFUL: 4406 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { 4407 switch (header->fsf_status_qual.word[0]) { 4408 4409 case FSF_SQ_CFDC_HARDENED_ON_SE: 4410 ZFCP_LOG_NORMAL( 4411 "CFDC on the adapter %s has being " 4412 "hardened on primary and secondary SE\n", 4413 zfcp_get_busid_by_adapter(adapter)); 4414 break; 4415 4416 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: 4417 ZFCP_LOG_NORMAL( 4418 "CFDC of the adapter %s could not " 4419 "be saved on the SE\n", 4420 zfcp_get_busid_by_adapter(adapter)); 4421 break; 4422 4423 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: 4424 ZFCP_LOG_NORMAL( 4425 "CFDC of the adapter %s could not " 4426 "be copied to the secondary SE\n", 4427 zfcp_get_busid_by_adapter(adapter)); 4428 break; 4429 4430 default: 4431 ZFCP_LOG_NORMAL( 4432 "CFDC could not be hardened " 4433 "on the adapter %s\n", 4434 zfcp_get_busid_by_adapter(adapter)); 4435 } 4436 } 4437 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4438 retval = -EAGAIN; 4439 break; 4440 4441 case FSF_AUTHORIZATION_FAILURE: 4442 ZFCP_LOG_NORMAL( 4443 "Adapter %s does not accept privileged commands\n", 4444 zfcp_get_busid_by_adapter(adapter)); 4445 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4446 retval = -EACCES; 4447 break; 4448 4449 case FSF_CFDC_ERROR_DETECTED: 4450 ZFCP_LOG_NORMAL( 4451 "Error at position %d in the CFDC, " 4452 "CFDC is discarded by the adapter %s\n", 4453 header->fsf_status_qual.word[0], 4454 zfcp_get_busid_by_adapter(adapter)); 4455 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4456 retval = -EPERM; 4457 break; 4458 4459 case FSF_CONTROL_FILE_UPDATE_ERROR: 4460 ZFCP_LOG_NORMAL( 4461 "Adapter %s cannot harden the control file, " 4462 "file is discarded\n", 4463 zfcp_get_busid_by_adapter(adapter)); 4464 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4465 retval = -EIO; 4466 break; 4467 4468 case FSF_CONTROL_FILE_TOO_LARGE: 4469 ZFCP_LOG_NORMAL( 4470 "Control file is too large, file is discarded " 4471 "by the adapter %s\n", 4472 zfcp_get_busid_by_adapter(adapter)); 4473 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4474 retval = -EIO; 4475 break; 4476 4477 case FSF_ACCESS_CONFLICT_DETECTED: 4478 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4479 ZFCP_LOG_NORMAL( 4480 "CFDC has been discarded by the adapter %s, " 4481 "because activation would impact " 4482 "%d active connection(s)\n", 4483 zfcp_get_busid_by_adapter(adapter), 4484 header->fsf_status_qual.word[0]); 4485 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4486 retval = -EIO; 4487 break; 4488 4489 case FSF_CONFLICTS_OVERRULED: 4490 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4491 ZFCP_LOG_NORMAL( 4492 "CFDC has been activated on the adapter %s, " 4493 "but activation has impacted " 4494 "%d active connection(s)\n", 4495 zfcp_get_busid_by_adapter(adapter), 4496 header->fsf_status_qual.word[0]); 4497 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4498 retval = -EIO; 4499 break; 4500 4501 case FSF_UNKNOWN_OP_SUBTYPE: 4502 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " 4503 "op_subtype=0x%x)\n", 4504 zfcp_get_busid_by_adapter(adapter), 4505 bottom->operation_subtype); 4506 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4507 retval = -EINVAL; 4508 break; 4509 4510 case FSF_INVALID_COMMAND_OPTION: 4511 ZFCP_LOG_NORMAL( 4512 "Invalid option 0x%x has been specified " 4513 "in QTCB bottom sent to the adapter %s\n", 4514 bottom->option, 4515 zfcp_get_busid_by_adapter(adapter)); 4516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4517 retval = -EINVAL; 4518 break; 4519 4520 default: 4521 ZFCP_LOG_NORMAL( 4522 "bug: An unknown/unexpected FSF status 0x%08x " 4523 "was presented on the adapter %s\n", 4524 header->fsf_status, 4525 zfcp_get_busid_by_adapter(adapter)); 4526 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); 4527 debug_exception(fsf_req->adapter->erp_dbf, 0, 4528 &header->fsf_status_qual.word[0], sizeof(u32)); 4529 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4530 retval = -EINVAL; 4531 break; 4532 } 4533 4534 skip_fsfstatus: 4535 return retval; 4536 } 4537 4538 static inline int 4539 zfcp_fsf_req_sbal_check(unsigned long *flags, 4540 struct zfcp_qdio_queue *queue, int needed) 4541 { 4542 write_lock_irqsave(&queue->queue_lock, *flags); 4543 if (likely(atomic_read(&queue->free_count) >= needed)) 4544 return 1; 4545 write_unlock_irqrestore(&queue->queue_lock, *flags); 4546 return 0; 4547 } 4548 4549 /* 4550 * set qtcb pointer in fsf_req and initialize QTCB 4551 */ 4552 static void 4553 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) 4554 { 4555 if (likely(fsf_req->qtcb != NULL)) { 4556 fsf_req->qtcb->prefix.req_seq_no = 4557 fsf_req->adapter->fsf_req_seq_no; 4558 fsf_req->qtcb->prefix.req_id = fsf_req->req_id; 4559 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; 4560 fsf_req->qtcb->prefix.qtcb_type = 4561 fsf_qtcb_type[fsf_req->fsf_command]; 4562 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; 4563 fsf_req->qtcb->header.req_handle = fsf_req->req_id; 4564 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; 4565 } 4566 } 4567 4568 /** 4569 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue 4570 * @adapter: adapter for which request queue is examined 4571 * @req_flags: flags indicating whether to wait for needed SBAL or not 4572 * @lock_flags: lock_flags if queue_lock is taken 4573 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS 4574 * Locks: lock adapter->request_queue->queue_lock on success 4575 */ 4576 static int 4577 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, 4578 unsigned long *lock_flags) 4579 { 4580 long ret; 4581 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4582 4583 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { 4584 ret = wait_event_interruptible_timeout(adapter->request_wq, 4585 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), 4586 ZFCP_SBAL_TIMEOUT); 4587 if (ret < 0) 4588 return ret; 4589 if (!ret) 4590 return -EIO; 4591 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) 4592 return -EIO; 4593 4594 return 0; 4595 } 4596 4597 /* 4598 * function: zfcp_fsf_req_create 4599 * 4600 * purpose: create an FSF request at the specified adapter and 4601 * setup common fields 4602 * 4603 * returns: -ENOMEM if there was insufficient memory for a request 4604 * -EIO if no qdio buffers could be allocate to the request 4605 * -EINVAL/-EPERM on bug conditions in req_dequeue 4606 * 0 in success 4607 * 4608 * note: The created request is returned by reference. 4609 * 4610 * locks: lock of concerned request queue must not be held, 4611 * but is held on completion (write, irqsave) 4612 */ 4613 int 4614 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, 4615 mempool_t *pool, unsigned long *lock_flags, 4616 struct zfcp_fsf_req **fsf_req_p) 4617 { 4618 volatile struct qdio_buffer_element *sbale; 4619 struct zfcp_fsf_req *fsf_req = NULL; 4620 int ret = 0; 4621 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4622 4623 /* allocate new FSF request */ 4624 fsf_req = zfcp_fsf_req_alloc(pool, req_flags); 4625 if (unlikely(NULL == fsf_req)) { 4626 ZFCP_LOG_DEBUG("error: Could not put an FSF request into" 4627 "the outbound (send) queue.\n"); 4628 ret = -ENOMEM; 4629 goto failed_fsf_req; 4630 } 4631 4632 fsf_req->adapter = adapter; 4633 fsf_req->fsf_command = fsf_cmd; 4634 INIT_LIST_HEAD(&fsf_req->list); 4635 init_timer(&fsf_req->timer); 4636 4637 /* initialize waitqueue which may be used to wait on 4638 this request completion */ 4639 init_waitqueue_head(&fsf_req->completion_wq); 4640 4641 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); 4642 if (ret < 0) 4643 goto failed_sbals; 4644 4645 /* this is serialized (we are holding req_queue-lock of adapter) */ 4646 if (adapter->req_no == 0) 4647 adapter->req_no++; 4648 fsf_req->req_id = adapter->req_no++; 4649 4650 zfcp_fsf_req_qtcb_init(fsf_req); 4651 4652 /* 4653 * We hold queue_lock here. Check if QDIOUP is set and let request fail 4654 * if it is not set (see also *_open_qdio and *_close_qdio). 4655 */ 4656 4657 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { 4658 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); 4659 ret = -EIO; 4660 goto failed_sbals; 4661 } 4662 4663 if (fsf_req->qtcb) { 4664 fsf_req->seq_no = adapter->fsf_req_seq_no; 4665 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 4666 } 4667 fsf_req->sbal_number = 1; 4668 fsf_req->sbal_first = req_queue->free_index; 4669 fsf_req->sbal_curr = req_queue->free_index; 4670 fsf_req->sbale_curr = 1; 4671 4672 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { 4673 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 4674 } 4675 4676 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4677 4678 /* setup common SBALE fields */ 4679 sbale[0].addr = (void *) fsf_req->req_id; 4680 sbale[0].flags |= SBAL_FLAGS0_COMMAND; 4681 if (likely(fsf_req->qtcb != NULL)) { 4682 sbale[1].addr = (void *) fsf_req->qtcb; 4683 sbale[1].length = sizeof(struct fsf_qtcb); 4684 } 4685 4686 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", 4687 fsf_req->sbal_number, fsf_req->sbal_first); 4688 4689 goto success; 4690 4691 failed_sbals: 4692 /* dequeue new FSF request previously enqueued */ 4693 zfcp_fsf_req_free(fsf_req); 4694 fsf_req = NULL; 4695 4696 failed_fsf_req: 4697 write_lock_irqsave(&req_queue->queue_lock, *lock_flags); 4698 success: 4699 *fsf_req_p = fsf_req; 4700 return ret; 4701 } 4702 4703 /* 4704 * function: zfcp_fsf_req_send 4705 * 4706 * purpose: start transfer of FSF request via QDIO 4707 * 4708 * returns: 0 - request transfer succesfully started 4709 * !0 - start of request transfer failed 4710 */ 4711 static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) 4712 { 4713 struct zfcp_adapter *adapter; 4714 struct zfcp_qdio_queue *req_queue; 4715 volatile struct qdio_buffer_element *sbale; 4716 int inc_seq_no; 4717 int new_distance_from_int; 4718 u64 dbg_tmp[2]; 4719 int retval = 0; 4720 4721 adapter = fsf_req->adapter; 4722 req_queue = &adapter->request_queue, 4723 4724 4725 /* FIXME(debug): remove it later */ 4726 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); 4727 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); 4728 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); 4729 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, 4730 sbale[1].length); 4731 4732 /* put allocated FSF request into hash table */ 4733 spin_lock(&adapter->req_list_lock); 4734 zfcp_reqlist_add(adapter, fsf_req); 4735 spin_unlock(&adapter->req_list_lock); 4736 4737 inc_seq_no = (fsf_req->qtcb != NULL); 4738 4739 ZFCP_LOG_TRACE("request queue of adapter %s: " 4740 "next free SBAL is %i, %i free SBALs\n", 4741 zfcp_get_busid_by_adapter(adapter), 4742 req_queue->free_index, 4743 atomic_read(&req_queue->free_count)); 4744 4745 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " 4746 "index_in_queue=%i, count=%i, buffers=%p\n", 4747 zfcp_get_busid_by_adapter(adapter), 4748 QDIO_FLAG_SYNC_OUTPUT, 4749 0, fsf_req->sbal_first, fsf_req->sbal_number, 4750 &req_queue->buffer[fsf_req->sbal_first]); 4751 4752 /* 4753 * adjust the number of free SBALs in request queue as well as 4754 * position of first one 4755 */ 4756 atomic_sub(fsf_req->sbal_number, &req_queue->free_count); 4757 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); 4758 req_queue->free_index += fsf_req->sbal_number; /* increase */ 4759 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ 4760 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); 4761 4762 fsf_req->issued = get_clock(); 4763 4764 retval = do_QDIO(adapter->ccw_device, 4765 QDIO_FLAG_SYNC_OUTPUT, 4766 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); 4767 4768 dbg_tmp[0] = (unsigned long) sbale[0].addr; 4769 dbg_tmp[1] = (u64) retval; 4770 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16); 4771 4772 if (unlikely(retval)) { 4773 /* Queues are down..... */ 4774 retval = -EIO; 4775 del_timer(&fsf_req->timer); 4776 spin_lock(&adapter->req_list_lock); 4777 zfcp_reqlist_remove(adapter, fsf_req); 4778 spin_unlock(&adapter->req_list_lock); 4779 /* undo changes in request queue made for this request */ 4780 zfcp_qdio_zero_sbals(req_queue->buffer, 4781 fsf_req->sbal_first, fsf_req->sbal_number); 4782 atomic_add(fsf_req->sbal_number, &req_queue->free_count); 4783 req_queue->free_index -= fsf_req->sbal_number; 4784 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; 4785 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ 4786 zfcp_erp_adapter_reopen(adapter, 0); 4787 } else { 4788 req_queue->distance_from_int = new_distance_from_int; 4789 /* 4790 * increase FSF sequence counter - 4791 * this must only be done for request successfully enqueued to 4792 * QDIO this rejected requests may be cleaned up by calling 4793 * routines resulting in missing sequence counter values 4794 * otherwise, 4795 */ 4796 4797 /* Don't increase for unsolicited status */ 4798 if (inc_seq_no) 4799 adapter->fsf_req_seq_no++; 4800 4801 /* count FSF requests pending */ 4802 atomic_inc(&adapter->reqs_active); 4803 } 4804 return retval; 4805 } 4806 4807 #undef ZFCP_LOG_AREA 4808