1 /* 2 * 3 * linux/drivers/s390/scsi/zfcp_fsf.c 4 * 5 * FCP adapter driver for IBM eServer zSeries 6 * 7 * (C) Copyright IBM Corp. 2002, 2004 8 * 9 * Author(s): Martin Peschke <mpeschke@de.ibm.com> 10 * Raimund Schroeder <raimund.schroeder@de.ibm.com> 11 * Aron Zeh 12 * Wolfgang Taphorn 13 * Stefan Bader <stefan.bader@de.ibm.com> 14 * Heiko Carstens <heiko.carstens@de.ibm.com> 15 * Andreas Herrmann <aherrman@de.ibm.com> 16 * Volker Sameske <sameske@de.ibm.com> 17 * 18 * This program is free software; you can redistribute it and/or modify 19 * it under the terms of the GNU General Public License as published by 20 * the Free Software Foundation; either version 2, or (at your option) 21 * any later version. 22 * 23 * This program is distributed in the hope that it will be useful, 24 * but WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 * GNU General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 31 */ 32 33 #define ZFCP_FSF_C_REVISION "$Revision: 1.92 $" 34 35 #include "zfcp_ext.h" 36 37 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); 38 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); 39 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); 40 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); 41 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); 42 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); 43 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); 44 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); 45 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); 46 static int zfcp_fsf_send_fcp_command_task_management_handler( 47 struct zfcp_fsf_req *); 48 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); 49 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); 50 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); 51 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); 52 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); 53 static inline int zfcp_fsf_req_sbal_check( 54 unsigned long *, struct zfcp_qdio_queue *, int); 55 static inline int zfcp_use_one_sbal( 56 struct scatterlist *, int, struct scatterlist *, int); 57 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); 58 static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *); 59 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); 60 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); 61 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); 62 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); 63 static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *); 64 static void zfcp_fsf_req_free(struct zfcp_fsf_req *); 65 66 /* association between FSF command and FSF QTCB type */ 67 static u32 fsf_qtcb_type[] = { 68 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 69 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 70 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 71 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 72 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 73 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 74 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 75 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 76 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 77 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 78 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 79 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 80 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 81 }; 82 83 static const char zfcp_act_subtable_type[5][8] = { 84 "unknown", "OS", "WWPN", "DID", "LUN" 85 }; 86 87 /****************************************************************/ 88 /*************** FSF related Functions *************************/ 89 /****************************************************************/ 90 91 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF 92 93 /* 94 * function: zfcp_fsf_req_alloc 95 * 96 * purpose: Obtains an fsf_req and potentially a qtcb (for all but 97 * unsolicited requests) via helper functions 98 * Does some initial fsf request set-up. 99 * 100 * returns: pointer to allocated fsf_req if successfull 101 * NULL otherwise 102 * 103 * locks: none 104 * 105 */ 106 static struct zfcp_fsf_req * 107 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) 108 { 109 size_t size; 110 void *ptr; 111 struct zfcp_fsf_req *fsf_req = NULL; 112 113 if (req_flags & ZFCP_REQ_NO_QTCB) 114 size = sizeof(struct zfcp_fsf_req); 115 else 116 size = sizeof(struct zfcp_fsf_req_pool_element); 117 118 if (likely(pool != NULL)) 119 ptr = mempool_alloc(pool, GFP_ATOMIC); 120 else 121 ptr = kmalloc(size, GFP_ATOMIC); 122 123 if (unlikely(NULL == ptr)) 124 goto out; 125 126 memset(ptr, 0, size); 127 128 if (req_flags & ZFCP_REQ_NO_QTCB) { 129 fsf_req = (struct zfcp_fsf_req *) ptr; 130 } else { 131 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req; 132 fsf_req->qtcb = 133 &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb; 134 } 135 136 fsf_req->pool = pool; 137 138 out: 139 return fsf_req; 140 } 141 142 /* 143 * function: zfcp_fsf_req_free 144 * 145 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or 146 * returns it into the pool via helper functions. 147 * 148 * returns: sod all 149 * 150 * locks: none 151 */ 152 static void 153 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) 154 { 155 if (likely(fsf_req->pool != NULL)) 156 mempool_free(fsf_req, fsf_req->pool); 157 else 158 kfree(fsf_req); 159 } 160 161 /* 162 * function: 163 * 164 * purpose: 165 * 166 * returns: 167 * 168 * note: qdio queues shall be down (no ongoing inbound processing) 169 */ 170 int 171 zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 172 { 173 int retval = 0; 174 struct zfcp_fsf_req *fsf_req, *tmp; 175 176 list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head, 177 list) 178 zfcp_fsf_req_dismiss(fsf_req); 179 /* wait_event_timeout? */ 180 while (!list_empty(&adapter->fsf_req_list_head)) { 181 ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n", 182 zfcp_get_busid_by_adapter(adapter)); 183 /* wait for woken intiators to clean up their requests */ 184 msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT)); 185 } 186 187 /* consistency check */ 188 if (atomic_read(&adapter->fsf_reqs_active)) { 189 ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending " 190 "on adapter %s after cleanup.\n", 191 atomic_read(&adapter->fsf_reqs_active), 192 zfcp_get_busid_by_adapter(adapter)); 193 atomic_set(&adapter->fsf_reqs_active, 0); 194 } 195 196 return retval; 197 } 198 199 /* 200 * function: 201 * 202 * purpose: 203 * 204 * returns: 205 */ 206 static void 207 zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req) 208 { 209 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 210 zfcp_fsf_req_complete(fsf_req); 211 } 212 213 /* 214 * function: zfcp_fsf_req_complete 215 * 216 * purpose: Updates active counts and timers for openfcp-reqs 217 * May cleanup request after req_eval returns 218 * 219 * returns: 0 - success 220 * !0 - failure 221 * 222 * context: 223 */ 224 int 225 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) 226 { 227 int retval = 0; 228 int cleanup; 229 struct zfcp_adapter *adapter = fsf_req->adapter; 230 231 /* do some statistics */ 232 atomic_dec(&adapter->fsf_reqs_active); 233 234 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { 235 ZFCP_LOG_DEBUG("Status read response received\n"); 236 /* 237 * Note: all cleanup handling is done in the callchain of 238 * the function call-chain below. 239 */ 240 zfcp_fsf_status_read_handler(fsf_req); 241 goto out; 242 } else 243 zfcp_fsf_protstatus_eval(fsf_req); 244 245 /* 246 * fsf_req may be deleted due to waking up functions, so 247 * cleanup is saved here and used later 248 */ 249 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 250 cleanup = 1; 251 else 252 cleanup = 0; 253 254 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; 255 256 /* cleanup request if requested by initiator */ 257 if (likely(cleanup)) { 258 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); 259 /* 260 * lock must not be held here since it will be 261 * grabed by the called routine, too 262 */ 263 zfcp_fsf_req_cleanup(fsf_req); 264 } else { 265 /* notify initiator waiting for the requests completion */ 266 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); 267 /* 268 * FIXME: Race! We must not access fsf_req here as it might have been 269 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED 270 * flag. It's an improbable case. But, we have the same paranoia for 271 * the cleanup flag already. 272 * Might better be handled using complete()? 273 * (setting the flag and doing wakeup ought to be atomic 274 * with regard to checking the flag as long as waitqueue is 275 * part of the to be released structure) 276 */ 277 wake_up(&fsf_req->completion_wq); 278 } 279 280 out: 281 return retval; 282 } 283 284 /* 285 * function: zfcp_fsf_protstatus_eval 286 * 287 * purpose: evaluates the QTCB of the finished FSF request 288 * and initiates appropriate actions 289 * (usually calling FSF command specific handlers) 290 * 291 * returns: 292 * 293 * context: 294 * 295 * locks: 296 */ 297 static int 298 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) 299 { 300 int retval = 0; 301 struct zfcp_adapter *adapter = fsf_req->adapter; 302 303 ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb); 304 305 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 306 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", 307 (unsigned long) fsf_req); 308 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 309 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ 310 zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0); 311 goto skip_protstatus; 312 } 313 314 /* log additional information provided by FSF (if any) */ 315 if (unlikely(fsf_req->qtcb->header.log_length)) { 316 /* do not trust them ;-) */ 317 if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) { 318 ZFCP_LOG_NORMAL 319 ("bug: ULP (FSF logging) log data starts " 320 "beyond end of packet header. Ignored. " 321 "(start=%i, size=%li)\n", 322 fsf_req->qtcb->header.log_start, 323 sizeof(struct fsf_qtcb)); 324 goto forget_log; 325 } 326 if ((size_t) (fsf_req->qtcb->header.log_start + 327 fsf_req->qtcb->header.log_length) 328 > sizeof(struct fsf_qtcb)) { 329 ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends " 330 "beyond end of packet header. Ignored. " 331 "(start=%i, length=%i, size=%li)\n", 332 fsf_req->qtcb->header.log_start, 333 fsf_req->qtcb->header.log_length, 334 sizeof(struct fsf_qtcb)); 335 goto forget_log; 336 } 337 ZFCP_LOG_TRACE("ULP log data: \n"); 338 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 339 (char *) fsf_req->qtcb + 340 fsf_req->qtcb->header.log_start, 341 fsf_req->qtcb->header.log_length); 342 } 343 forget_log: 344 345 /* evaluate FSF Protocol Status */ 346 switch (fsf_req->qtcb->prefix.prot_status) { 347 348 case FSF_PROT_GOOD: 349 ZFCP_LOG_TRACE("FSF_PROT_GOOD\n"); 350 break; 351 352 case FSF_PROT_FSF_STATUS_PRESENTED: 353 ZFCP_LOG_TRACE("FSF_PROT_FSF_STATUS_PRESENTED\n"); 354 break; 355 356 case FSF_PROT_QTCB_VERSION_ERROR: 357 ZFCP_LOG_FLAGS(0, "FSF_PROT_QTCB_VERSION_ERROR\n"); 358 ZFCP_LOG_NORMAL("error: The adapter %s contains " 359 "microcode of version 0x%x, the device driver " 360 "only supports 0x%x. Aborting.\n", 361 zfcp_get_busid_by_adapter(adapter), 362 fsf_req->qtcb->prefix.prot_status_qual. 363 version_error.fsf_version, ZFCP_QTCB_VERSION); 364 /* stop operation for this adapter */ 365 debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err"); 366 zfcp_erp_adapter_shutdown(adapter, 0); 367 zfcp_cmd_dbf_event_fsf("qverserr", fsf_req, 368 &fsf_req->qtcb->prefix.prot_status_qual, 369 sizeof (union fsf_prot_status_qual)); 370 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 371 break; 372 373 case FSF_PROT_SEQ_NUMB_ERROR: 374 ZFCP_LOG_FLAGS(0, "FSF_PROT_SEQ_NUMB_ERROR\n"); 375 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " 376 "driver (0x%x) and adapter %s (0x%x). " 377 "Restarting all operations on this adapter.\n", 378 fsf_req->qtcb->prefix.req_seq_no, 379 zfcp_get_busid_by_adapter(adapter), 380 fsf_req->qtcb->prefix.prot_status_qual. 381 sequence_error.exp_req_seq_no); 382 debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err"); 383 /* restart operation on this adapter */ 384 zfcp_erp_adapter_reopen(adapter, 0); 385 zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req, 386 &fsf_req->qtcb->prefix.prot_status_qual, 387 sizeof (union fsf_prot_status_qual)); 388 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 389 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 390 break; 391 392 case FSF_PROT_UNSUPP_QTCB_TYPE: 393 ZFCP_LOG_FLAGS(0, "FSF_PROT_UNSUP_QTCB_TYPE\n"); 394 ZFCP_LOG_NORMAL("error: Packet header type used by the " 395 "device driver is incompatible with " 396 "that used on adapter %s. " 397 "Stopping all operations on this adapter.\n", 398 zfcp_get_busid_by_adapter(adapter)); 399 debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb"); 400 zfcp_erp_adapter_shutdown(adapter, 0); 401 zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req, 402 &fsf_req->qtcb->prefix.prot_status_qual, 403 sizeof (union fsf_prot_status_qual)); 404 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 405 break; 406 407 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 408 ZFCP_LOG_FLAGS(1, "FSF_PROT_HOST_CONNECTION_INITIALIZING\n"); 409 zfcp_cmd_dbf_event_fsf("hconinit", fsf_req, 410 &fsf_req->qtcb->prefix.prot_status_qual, 411 sizeof (union fsf_prot_status_qual)); 412 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 413 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 414 &(adapter->status)); 415 debug_text_event(adapter->erp_dbf, 3, "prot_con_init"); 416 break; 417 418 case FSF_PROT_DUPLICATE_REQUEST_ID: 419 ZFCP_LOG_FLAGS(0, "FSF_PROT_DUPLICATE_REQUEST_IDS\n"); 420 if (fsf_req->qtcb) { 421 ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " 422 "to the adapter %s is ambiguous. " 423 "Stopping all operations on this " 424 "adapter.\n", 425 *(unsigned long long *) 426 (&fsf_req->qtcb->bottom.support. 427 req_handle), 428 zfcp_get_busid_by_adapter(adapter)); 429 } else { 430 ZFCP_LOG_NORMAL("bug: The request identifier %p " 431 "to the adapter %s is ambiguous. " 432 "Stopping all operations on this " 433 "adapter. " 434 "(bug: got this for an unsolicited " 435 "status read request)\n", 436 fsf_req, 437 zfcp_get_busid_by_adapter(adapter)); 438 } 439 debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id"); 440 zfcp_erp_adapter_shutdown(adapter, 0); 441 zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req, 442 &fsf_req->qtcb->prefix.prot_status_qual, 443 sizeof (union fsf_prot_status_qual)); 444 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 445 break; 446 447 case FSF_PROT_LINK_DOWN: 448 ZFCP_LOG_FLAGS(1, "FSF_PROT_LINK_DOWN\n"); 449 /* 450 * 'test and set' is not atomic here - 451 * it's ok as long as calls to our response queue handler 452 * (and thus execution of this code here) are serialized 453 * by the qdio module 454 */ 455 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 456 &adapter->status)) { 457 switch (fsf_req->qtcb->prefix.prot_status_qual. 458 locallink_error.code) { 459 case FSF_PSQ_LINK_NOLIGHT: 460 ZFCP_LOG_INFO("The local link to adapter %s " 461 "is down (no light detected).\n", 462 zfcp_get_busid_by_adapter( 463 adapter)); 464 break; 465 case FSF_PSQ_LINK_WRAPPLUG: 466 ZFCP_LOG_INFO("The local link to adapter %s " 467 "is down (wrap plug detected).\n", 468 zfcp_get_busid_by_adapter( 469 adapter)); 470 break; 471 case FSF_PSQ_LINK_NOFCP: 472 ZFCP_LOG_INFO("The local link to adapter %s " 473 "is down (adjacent node on " 474 "link does not support FCP).\n", 475 zfcp_get_busid_by_adapter( 476 adapter)); 477 break; 478 default: 479 ZFCP_LOG_INFO("The local link to adapter %s " 480 "is down " 481 "(warning: unknown reason " 482 "code).\n", 483 zfcp_get_busid_by_adapter( 484 adapter)); 485 break; 486 487 } 488 /* 489 * Due to the 'erp failed' flag the adapter won't 490 * be recovered but will be just set to 'blocked' 491 * state. All subordinary devices will have state 492 * 'blocked' and 'erp failed', too. 493 * Thus the adapter is still able to provide 494 * 'link up' status without being flooded with 495 * requests. 496 * (note: even 'close port' is not permitted) 497 */ 498 ZFCP_LOG_INFO("Stopping all operations for adapter " 499 "%s.\n", 500 zfcp_get_busid_by_adapter(adapter)); 501 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 502 ZFCP_STATUS_COMMON_ERP_FAILED, 503 &adapter->status); 504 zfcp_erp_adapter_reopen(adapter, 0); 505 debug_text_event(adapter->erp_dbf, 1, "prot_link_down"); 506 } 507 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 508 break; 509 510 case FSF_PROT_REEST_QUEUE: 511 ZFCP_LOG_FLAGS(1, "FSF_PROT_REEST_QUEUE\n"); 512 debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue"); 513 ZFCP_LOG_INFO("The local link to adapter with " 514 "%s was re-plugged. " 515 "Re-starting operations on this adapter.\n", 516 zfcp_get_busid_by_adapter(adapter)); 517 /* All ports should be marked as ready to run again */ 518 zfcp_erp_modify_adapter_status(adapter, 519 ZFCP_STATUS_COMMON_RUNNING, 520 ZFCP_SET); 521 zfcp_erp_adapter_reopen(adapter, 522 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 523 | ZFCP_STATUS_COMMON_ERP_FAILED); 524 zfcp_cmd_dbf_event_fsf("reestque", fsf_req, 525 &fsf_req->qtcb->prefix.prot_status_qual, 526 sizeof (union fsf_prot_status_qual)); 527 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 528 break; 529 530 case FSF_PROT_ERROR_STATE: 531 ZFCP_LOG_FLAGS(0, "FSF_PROT_ERROR_STATE\n"); 532 ZFCP_LOG_NORMAL("error: The adapter %s " 533 "has entered the error state. " 534 "Restarting all operations on this " 535 "adapter.\n", 536 zfcp_get_busid_by_adapter(adapter)); 537 debug_text_event(adapter->erp_dbf, 0, "prot_err_sta"); 538 /* restart operation on this adapter */ 539 zfcp_erp_adapter_reopen(adapter, 0); 540 zfcp_cmd_dbf_event_fsf("proterrs", fsf_req, 541 &fsf_req->qtcb->prefix.prot_status_qual, 542 sizeof (union fsf_prot_status_qual)); 543 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; 544 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 545 break; 546 547 default: 548 ZFCP_LOG_NORMAL("bug: Transfer protocol status information " 549 "provided by the adapter %s " 550 "is not compatible with the device driver. " 551 "Stopping all operations on this adapter. " 552 "(debug info 0x%x).\n", 553 zfcp_get_busid_by_adapter(adapter), 554 fsf_req->qtcb->prefix.prot_status); 555 debug_text_event(adapter->erp_dbf, 0, "prot_inval:"); 556 debug_exception(adapter->erp_dbf, 0, 557 &fsf_req->qtcb->prefix.prot_status, 558 sizeof (u32)); 559 zfcp_erp_adapter_shutdown(adapter, 0); 560 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 561 } 562 563 skip_protstatus: 564 /* 565 * always call specific handlers to give them a chance to do 566 * something meaningful even in error cases 567 */ 568 zfcp_fsf_fsfstatus_eval(fsf_req); 569 return retval; 570 } 571 572 /* 573 * function: zfcp_fsf_fsfstatus_eval 574 * 575 * purpose: evaluates FSF status of completed FSF request 576 * and acts accordingly 577 * 578 * returns: 579 */ 580 static int 581 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) 582 { 583 int retval = 0; 584 585 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 586 goto skip_fsfstatus; 587 } 588 589 /* evaluate FSF Status */ 590 switch (fsf_req->qtcb->header.fsf_status) { 591 case FSF_UNKNOWN_COMMAND: 592 ZFCP_LOG_FLAGS(0, "FSF_UNKNOWN_COMMAND\n"); 593 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 594 "not known by the adapter %s " 595 "Stopping all operations on this adapter. " 596 "(debug info 0x%x).\n", 597 zfcp_get_busid_by_adapter(fsf_req->adapter), 598 fsf_req->qtcb->header.fsf_command); 599 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 600 "fsf_s_unknown"); 601 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 602 zfcp_cmd_dbf_event_fsf("unknownc", fsf_req, 603 &fsf_req->qtcb->header.fsf_status_qual, 604 sizeof (union fsf_status_qual)); 605 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 606 break; 607 608 case FSF_FCP_RSP_AVAILABLE: 609 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n"); 610 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " 611 "SCSI stack.\n"); 612 debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp"); 613 break; 614 615 case FSF_ADAPTER_STATUS_AVAILABLE: 616 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 617 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus"); 618 zfcp_fsf_fsfstatus_qual_eval(fsf_req); 619 break; 620 621 default: 622 break; 623 } 624 625 skip_fsfstatus: 626 /* 627 * always call specific handlers to give them a chance to do 628 * something meaningful even in error cases 629 */ 630 zfcp_fsf_req_dispatch(fsf_req); 631 632 return retval; 633 } 634 635 /* 636 * function: zfcp_fsf_fsfstatus_qual_eval 637 * 638 * purpose: evaluates FSF status-qualifier of completed FSF request 639 * and acts accordingly 640 * 641 * returns: 642 */ 643 static int 644 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) 645 { 646 int retval = 0; 647 648 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 649 case FSF_SQ_FCP_RSP_AVAILABLE: 650 ZFCP_LOG_FLAGS(2, "FSF_SQ_FCP_RSP_AVAILABLE\n"); 651 debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp"); 652 break; 653 case FSF_SQ_RETRY_IF_POSSIBLE: 654 ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n"); 655 /* The SCSI-stack may now issue retries or escalate */ 656 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry"); 657 zfcp_cmd_dbf_event_fsf("sqretry", fsf_req, 658 &fsf_req->qtcb->header.fsf_status_qual, 659 sizeof (union fsf_status_qual)); 660 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 661 break; 662 case FSF_SQ_COMMAND_ABORTED: 663 ZFCP_LOG_FLAGS(2, "FSF_SQ_COMMAND_ABORTED\n"); 664 /* Carry the aborted state on to upper layer */ 665 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort"); 666 zfcp_cmd_dbf_event_fsf("sqabort", fsf_req, 667 &fsf_req->qtcb->header.fsf_status_qual, 668 sizeof (union fsf_status_qual)); 669 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; 670 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 671 break; 672 case FSF_SQ_NO_RECOM: 673 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RECOM\n"); 674 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 675 "fsf_sq_no_rec"); 676 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a" 677 "problem on the adapter %s " 678 "Stopping all operations on this adapter. ", 679 zfcp_get_busid_by_adapter(fsf_req->adapter)); 680 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); 681 zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req, 682 &fsf_req->qtcb->header.fsf_status_qual, 683 sizeof (union fsf_status_qual)); 684 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 685 break; 686 case FSF_SQ_ULP_PROGRAMMING_ERROR: 687 ZFCP_LOG_FLAGS(0, "FSF_SQ_ULP_PROGRAMMING_ERROR\n"); 688 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " 689 "(adapter %s)\n", 690 zfcp_get_busid_by_adapter(fsf_req->adapter)); 691 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 692 "fsf_sq_ulp_err"); 693 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 694 break; 695 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 696 case FSF_SQ_NO_RETRY_POSSIBLE: 697 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 698 /* dealt with in the respective functions */ 699 break; 700 default: 701 ZFCP_LOG_NORMAL("bug: Additional status info could " 702 "not be interpreted properly.\n"); 703 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 704 (char *) &fsf_req->qtcb->header.fsf_status_qual, 705 sizeof (union fsf_status_qual)); 706 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); 707 debug_exception(fsf_req->adapter->erp_dbf, 0, 708 &fsf_req->qtcb->header.fsf_status_qual.word[0], 709 sizeof (u32)); 710 zfcp_cmd_dbf_event_fsf("squndef", fsf_req, 711 &fsf_req->qtcb->header.fsf_status_qual, 712 sizeof (union fsf_status_qual)); 713 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 714 break; 715 } 716 717 return retval; 718 } 719 720 /* 721 * function: zfcp_fsf_req_dispatch 722 * 723 * purpose: calls the appropriate command specific handler 724 * 725 * returns: 726 */ 727 static int 728 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) 729 { 730 struct zfcp_erp_action *erp_action = fsf_req->erp_action; 731 struct zfcp_adapter *adapter = fsf_req->adapter; 732 int retval = 0; 733 734 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 735 ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb); 736 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 737 (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb)); 738 } 739 740 switch (fsf_req->fsf_command) { 741 742 case FSF_QTCB_FCP_CMND: 743 ZFCP_LOG_FLAGS(3, "FSF_QTCB_FCP_CMND\n"); 744 zfcp_fsf_send_fcp_command_handler(fsf_req); 745 break; 746 747 case FSF_QTCB_ABORT_FCP_CMND: 748 ZFCP_LOG_FLAGS(2, "FSF_QTCB_ABORT_FCP_CMND\n"); 749 zfcp_fsf_abort_fcp_command_handler(fsf_req); 750 break; 751 752 case FSF_QTCB_SEND_GENERIC: 753 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_GENERIC\n"); 754 zfcp_fsf_send_ct_handler(fsf_req); 755 break; 756 757 case FSF_QTCB_OPEN_PORT_WITH_DID: 758 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_PORT_WITH_DID\n"); 759 zfcp_fsf_open_port_handler(fsf_req); 760 break; 761 762 case FSF_QTCB_OPEN_LUN: 763 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_LUN\n"); 764 zfcp_fsf_open_unit_handler(fsf_req); 765 break; 766 767 case FSF_QTCB_CLOSE_LUN: 768 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_LUN\n"); 769 zfcp_fsf_close_unit_handler(fsf_req); 770 break; 771 772 case FSF_QTCB_CLOSE_PORT: 773 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PORT\n"); 774 zfcp_fsf_close_port_handler(fsf_req); 775 break; 776 777 case FSF_QTCB_CLOSE_PHYSICAL_PORT: 778 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PHYSICAL_PORT\n"); 779 zfcp_fsf_close_physical_port_handler(fsf_req); 780 break; 781 782 case FSF_QTCB_EXCHANGE_CONFIG_DATA: 783 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_CONFIG_DATA\n"); 784 zfcp_fsf_exchange_config_data_handler(fsf_req); 785 break; 786 787 case FSF_QTCB_EXCHANGE_PORT_DATA: 788 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_PORT_DATA\n"); 789 zfcp_fsf_exchange_port_data_handler(fsf_req); 790 break; 791 792 case FSF_QTCB_SEND_ELS: 793 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_ELS\n"); 794 zfcp_fsf_send_els_handler(fsf_req); 795 break; 796 797 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 798 ZFCP_LOG_FLAGS(2, "FSF_QTCB_DOWNLOAD_CONTROL_FILE\n"); 799 zfcp_fsf_control_file_handler(fsf_req); 800 break; 801 802 case FSF_QTCB_UPLOAD_CONTROL_FILE: 803 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UPLOAD_CONTROL_FILE\n"); 804 zfcp_fsf_control_file_handler(fsf_req); 805 break; 806 807 default: 808 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UNKNOWN\n"); 809 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 810 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " 811 "not supported by the adapter %s\n", 812 zfcp_get_busid_by_adapter(fsf_req->adapter)); 813 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) 814 ZFCP_LOG_NORMAL 815 ("bug: Command issued by the device driver differs " 816 "from the command returned by the adapter %s " 817 "(debug info 0x%x, 0x%x).\n", 818 zfcp_get_busid_by_adapter(fsf_req->adapter), 819 fsf_req->fsf_command, 820 fsf_req->qtcb->header.fsf_command); 821 } 822 823 if (!erp_action) 824 return retval; 825 826 debug_text_event(adapter->erp_dbf, 3, "a_frh"); 827 debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); 828 zfcp_erp_async_handler(erp_action, 0); 829 830 return retval; 831 } 832 833 /* 834 * function: zfcp_fsf_status_read 835 * 836 * purpose: initiates a Status Read command at the specified adapter 837 * 838 * returns: 839 */ 840 int 841 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) 842 { 843 struct zfcp_fsf_req *fsf_req; 844 struct fsf_status_read_buffer *status_buffer; 845 unsigned long lock_flags; 846 volatile struct qdio_buffer_element *sbale; 847 int retval = 0; 848 849 /* setup new FSF request */ 850 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 851 req_flags | ZFCP_REQ_NO_QTCB, 852 adapter->pool.fsf_req_status_read, 853 &lock_flags, &fsf_req); 854 if (retval < 0) { 855 ZFCP_LOG_INFO("error: Could not create unsolicited status " 856 "buffer for adapter %s.\n", 857 zfcp_get_busid_by_adapter(adapter)); 858 goto failed_req_create; 859 } 860 861 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 862 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; 863 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; 864 fsf_req->sbale_curr = 2; 865 866 status_buffer = 867 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); 868 if (!status_buffer) { 869 ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); 870 goto failed_buf; 871 } 872 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); 873 fsf_req->data.status_read.buffer = status_buffer; 874 875 /* insert pointer to respective buffer */ 876 sbale = zfcp_qdio_sbale_curr(fsf_req); 877 sbale->addr = (void *) status_buffer; 878 sbale->length = sizeof(struct fsf_status_read_buffer); 879 880 /* start QDIO request for this FSF request */ 881 retval = zfcp_fsf_req_send(fsf_req, NULL); 882 if (retval) { 883 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " 884 "environment.\n"); 885 goto failed_req_send; 886 } 887 888 ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", 889 zfcp_get_busid_by_adapter(adapter)); 890 goto out; 891 892 failed_req_send: 893 mempool_free(status_buffer, adapter->pool.data_status_read); 894 895 failed_buf: 896 zfcp_fsf_req_free(fsf_req); 897 failed_req_create: 898 out: 899 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 900 return retval; 901 } 902 903 static int 904 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) 905 { 906 struct fsf_status_read_buffer *status_buffer; 907 struct zfcp_adapter *adapter; 908 struct zfcp_port *port; 909 unsigned long flags; 910 911 status_buffer = fsf_req->data.status_read.buffer; 912 adapter = fsf_req->adapter; 913 914 read_lock_irqsave(&zfcp_data.config_lock, flags); 915 list_for_each_entry(port, &adapter->port_list_head, list) 916 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) 917 break; 918 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 919 920 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { 921 ZFCP_LOG_NORMAL("bug: Reopen port indication received for" 922 "nonexisting port with d_id 0x%08x on " 923 "adapter %s. Ignored.\n", 924 status_buffer->d_id & ZFCP_DID_MASK, 925 zfcp_get_busid_by_adapter(adapter)); 926 goto out; 927 } 928 929 switch (status_buffer->status_subtype) { 930 931 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: 932 ZFCP_LOG_FLAGS(2, "FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT\n"); 933 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:"); 934 zfcp_erp_port_reopen(port, 0); 935 break; 936 937 case FSF_STATUS_READ_SUB_ERROR_PORT: 938 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SUB_ERROR_PORT\n"); 939 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:"); 940 zfcp_erp_port_shutdown(port, 0); 941 break; 942 943 default: 944 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:"); 945 debug_exception(adapter->erp_dbf, 0, 946 &status_buffer->status_subtype, sizeof (u32)); 947 ZFCP_LOG_NORMAL("bug: Undefined status subtype received " 948 "for a reopen indication on port with " 949 "d_id 0x%08x on the adapter %s. " 950 "Ignored. (debug info 0x%x)\n", 951 status_buffer->d_id, 952 zfcp_get_busid_by_adapter(adapter), 953 status_buffer->status_subtype); 954 } 955 out: 956 return 0; 957 } 958 959 /* 960 * function: zfcp_fsf_status_read_handler 961 * 962 * purpose: is called for finished Open Port command 963 * 964 * returns: 965 */ 966 static int 967 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) 968 { 969 int retval = 0; 970 struct zfcp_adapter *adapter = fsf_req->adapter; 971 struct fsf_status_read_buffer *status_buffer = 972 fsf_req->data.status_read.buffer; 973 974 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 975 mempool_free(status_buffer, adapter->pool.data_status_read); 976 zfcp_fsf_req_cleanup(fsf_req); 977 goto out; 978 } 979 980 switch (status_buffer->status_type) { 981 982 case FSF_STATUS_READ_PORT_CLOSED: 983 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_PORT_CLOSED\n"); 984 debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:"); 985 debug_event(adapter->erp_dbf, 3, 986 &status_buffer->d_id, sizeof (u32)); 987 zfcp_fsf_status_read_port_closed(fsf_req); 988 break; 989 990 case FSF_STATUS_READ_INCOMING_ELS: 991 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_INCOMING_ELS\n"); 992 debug_text_event(adapter->erp_dbf, 3, "unsol_els:"); 993 zfcp_fsf_incoming_els(fsf_req); 994 break; 995 996 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 997 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SENSE_DATA_AVAIL\n"); 998 debug_text_event(adapter->erp_dbf, 3, "unsol_sense:"); 999 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", 1000 zfcp_get_busid_by_adapter(adapter)); 1001 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer, 1002 sizeof(struct fsf_status_read_buffer)); 1003 break; 1004 1005 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 1006 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_BIT_ERROR_THRESHOLD\n"); 1007 debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:"); 1008 ZFCP_LOG_NORMAL("Bit error threshold data received:\n"); 1009 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 1010 (char *) status_buffer, 1011 sizeof (struct fsf_status_read_buffer)); 1012 break; 1013 1014 case FSF_STATUS_READ_LINK_DOWN: 1015 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_DOWN\n"); 1016 debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:"); 1017 ZFCP_LOG_INFO("Local link to adapter %s is down\n", 1018 zfcp_get_busid_by_adapter(adapter)); 1019 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 1020 &adapter->status); 1021 zfcp_erp_adapter_failed(adapter); 1022 break; 1023 1024 case FSF_STATUS_READ_LINK_UP: 1025 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_UP\n"); 1026 debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:"); 1027 ZFCP_LOG_INFO("Local link to adapter %s was replugged. " 1028 "Restarting operations on this adapter\n", 1029 zfcp_get_busid_by_adapter(adapter)); 1030 /* All ports should be marked as ready to run again */ 1031 zfcp_erp_modify_adapter_status(adapter, 1032 ZFCP_STATUS_COMMON_RUNNING, 1033 ZFCP_SET); 1034 zfcp_erp_adapter_reopen(adapter, 1035 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 1036 | ZFCP_STATUS_COMMON_ERP_FAILED); 1037 break; 1038 1039 case FSF_STATUS_READ_CFDC_UPDATED: 1040 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_UPDATED\n"); 1041 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:"); 1042 ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n", 1043 zfcp_get_busid_by_adapter(adapter)); 1044 zfcp_erp_adapter_access_changed(adapter); 1045 break; 1046 1047 case FSF_STATUS_READ_CFDC_HARDENED: 1048 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_HARDENED\n"); 1049 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:"); 1050 switch (status_buffer->status_subtype) { 1051 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: 1052 ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n", 1053 zfcp_get_busid_by_adapter(adapter)); 1054 break; 1055 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: 1056 ZFCP_LOG_INFO("CFDC of adapter %s has been copied " 1057 "to the secondary SE\n", 1058 zfcp_get_busid_by_adapter(adapter)); 1059 break; 1060 default: 1061 ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n", 1062 zfcp_get_busid_by_adapter(adapter)); 1063 } 1064 break; 1065 1066 default: 1067 debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:"); 1068 debug_exception(adapter->erp_dbf, 0, 1069 &status_buffer->status_type, sizeof (u32)); 1070 ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown " 1071 "type was received (debug info 0x%x)\n", 1072 status_buffer->status_type); 1073 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", 1074 status_buffer); 1075 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1076 (char *) status_buffer, 1077 sizeof (struct fsf_status_read_buffer)); 1078 break; 1079 } 1080 mempool_free(status_buffer, adapter->pool.data_status_read); 1081 zfcp_fsf_req_cleanup(fsf_req); 1082 /* 1083 * recycle buffer and start new request repeat until outbound 1084 * queue is empty or adapter shutdown is requested 1085 */ 1086 /* 1087 * FIXME(qdio): 1088 * we may wait in the req_create for 5s during shutdown, so 1089 * qdio_cleanup will have to wait at least that long before returning 1090 * with failure to allow us a proper cleanup under all circumstances 1091 */ 1092 /* 1093 * FIXME: 1094 * allocation failure possible? (Is this code needed?) 1095 */ 1096 retval = zfcp_fsf_status_read(adapter, 0); 1097 if (retval < 0) { 1098 ZFCP_LOG_INFO("Failed to create unsolicited status read " 1099 "request for the adapter %s.\n", 1100 zfcp_get_busid_by_adapter(adapter)); 1101 /* temporary fix to avoid status read buffer shortage */ 1102 adapter->status_read_failed++; 1103 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) 1104 < ZFCP_STATUS_READ_FAILED_THRESHOLD) { 1105 ZFCP_LOG_INFO("restart adapter %s due to status read " 1106 "buffer shortage\n", 1107 zfcp_get_busid_by_adapter(adapter)); 1108 zfcp_erp_adapter_reopen(adapter, 0); 1109 } 1110 } 1111 out: 1112 return retval; 1113 } 1114 1115 /* 1116 * function: zfcp_fsf_abort_fcp_command 1117 * 1118 * purpose: tells FSF to abort a running SCSI command 1119 * 1120 * returns: address of initiated FSF request 1121 * NULL - request could not be initiated 1122 * 1123 * FIXME(design): should be watched by a timeout !!! 1124 * FIXME(design) shouldn't this be modified to return an int 1125 * also...don't know how though 1126 */ 1127 struct zfcp_fsf_req * 1128 zfcp_fsf_abort_fcp_command(unsigned long old_req_id, 1129 struct zfcp_adapter *adapter, 1130 struct zfcp_unit *unit, int req_flags) 1131 { 1132 volatile struct qdio_buffer_element *sbale; 1133 unsigned long lock_flags; 1134 struct zfcp_fsf_req *fsf_req = NULL; 1135 int retval = 0; 1136 1137 /* setup new FSF request */ 1138 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, 1139 req_flags, adapter->pool.fsf_req_abort, 1140 &lock_flags, &fsf_req); 1141 if (retval < 0) { 1142 ZFCP_LOG_INFO("error: Failed to create an abort command " 1143 "request for lun 0x%016Lx on port 0x%016Lx " 1144 "on adapter %s.\n", 1145 unit->fcp_lun, 1146 unit->port->wwpn, 1147 zfcp_get_busid_by_adapter(adapter)); 1148 goto out; 1149 } 1150 1151 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1152 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 1153 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 1154 1155 fsf_req->data.abort_fcp_command.unit = unit; 1156 1157 /* set handles of unit and its parent port in QTCB */ 1158 fsf_req->qtcb->header.lun_handle = unit->handle; 1159 fsf_req->qtcb->header.port_handle = unit->port->handle; 1160 1161 /* set handle of request which should be aborted */ 1162 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; 1163 1164 /* start QDIO request for this FSF request */ 1165 1166 zfcp_fsf_start_scsi_er_timer(adapter); 1167 retval = zfcp_fsf_req_send(fsf_req, NULL); 1168 if (retval) { 1169 del_timer(&adapter->scsi_er_timer); 1170 ZFCP_LOG_INFO("error: Failed to send abort command request " 1171 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 1172 zfcp_get_busid_by_adapter(adapter), 1173 unit->port->wwpn, unit->fcp_lun); 1174 zfcp_fsf_req_free(fsf_req); 1175 fsf_req = NULL; 1176 goto out; 1177 } 1178 1179 ZFCP_LOG_DEBUG("Abort FCP Command request initiated " 1180 "(adapter%s, port d_id=0x%08x, " 1181 "unit x%016Lx, old_req_id=0x%lx)\n", 1182 zfcp_get_busid_by_adapter(adapter), 1183 unit->port->d_id, 1184 unit->fcp_lun, old_req_id); 1185 out: 1186 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 1187 return fsf_req; 1188 } 1189 1190 /* 1191 * function: zfcp_fsf_abort_fcp_command_handler 1192 * 1193 * purpose: is called for finished Abort FCP Command request 1194 * 1195 * returns: 1196 */ 1197 static int 1198 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) 1199 { 1200 int retval = -EINVAL; 1201 struct zfcp_unit *unit = new_fsf_req->data.abort_fcp_command.unit; 1202 unsigned char status_qual = 1203 new_fsf_req->qtcb->header.fsf_status_qual.word[0]; 1204 1205 del_timer(&new_fsf_req->adapter->scsi_er_timer); 1206 1207 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1208 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ 1209 goto skip_fsfstatus; 1210 } 1211 1212 /* evaluate FSF status in QTCB */ 1213 switch (new_fsf_req->qtcb->header.fsf_status) { 1214 1215 case FSF_PORT_HANDLE_NOT_VALID: 1216 if (status_qual >> 4 != status_qual % 0xf) { 1217 ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n"); 1218 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1219 "fsf_s_phand_nv0"); 1220 /* 1221 * In this case a command that was sent prior to a port 1222 * reopen was aborted (handles are different). This is 1223 * fine. 1224 */ 1225 } else { 1226 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 1227 ZFCP_LOG_INFO("Temporary port identifier 0x%x for " 1228 "port 0x%016Lx on adapter %s invalid. " 1229 "This may happen occasionally.\n", 1230 unit->port->handle, 1231 unit->port->wwpn, 1232 zfcp_get_busid_by_unit(unit)); 1233 ZFCP_LOG_INFO("status qualifier:\n"); 1234 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1235 (char *) &new_fsf_req->qtcb->header. 1236 fsf_status_qual, 1237 sizeof (union fsf_status_qual)); 1238 /* Let's hope this sorts out the mess */ 1239 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1240 "fsf_s_phand_nv1"); 1241 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 1242 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1243 } 1244 break; 1245 1246 case FSF_LUN_HANDLE_NOT_VALID: 1247 if (status_qual >> 4 != status_qual % 0xf) { 1248 /* 2 */ 1249 ZFCP_LOG_FLAGS(0, "FSF_LUN_HANDLE_NOT_VALID\n"); 1250 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1251 "fsf_s_lhand_nv0"); 1252 /* 1253 * In this case a command that was sent prior to a unit 1254 * reopen was aborted (handles are different). 1255 * This is fine. 1256 */ 1257 } else { 1258 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n"); 1259 ZFCP_LOG_INFO 1260 ("Warning: Temporary LUN identifier 0x%x of LUN " 1261 "0x%016Lx on port 0x%016Lx on adapter %s is " 1262 "invalid. This may happen in rare cases. " 1263 "Trying to re-establish link.\n", 1264 unit->handle, 1265 unit->fcp_lun, 1266 unit->port->wwpn, 1267 zfcp_get_busid_by_unit(unit)); 1268 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 1269 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 1270 (char *) &new_fsf_req->qtcb->header. 1271 fsf_status_qual, 1272 sizeof (union fsf_status_qual)); 1273 /* Let's hope this sorts out the mess */ 1274 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1275 "fsf_s_lhand_nv1"); 1276 zfcp_erp_port_reopen(unit->port, 0); 1277 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1278 } 1279 break; 1280 1281 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 1282 ZFCP_LOG_FLAGS(2, "FSF_FCP_COMMAND_DOES_NOT_EXIST\n"); 1283 retval = 0; 1284 debug_text_event(new_fsf_req->adapter->erp_dbf, 3, 1285 "fsf_s_no_exist"); 1286 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 1287 break; 1288 1289 case FSF_PORT_BOXED: 1290 /* 2 */ 1291 ZFCP_LOG_FLAGS(0, "FSF_PORT_BOXED\n"); 1292 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " 1293 "be reopened\n", unit->port->wwpn, 1294 zfcp_get_busid_by_unit(unit)); 1295 debug_text_event(new_fsf_req->adapter->erp_dbf, 2, 1296 "fsf_s_pboxed"); 1297 zfcp_erp_port_reopen(unit->port, 0); 1298 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1299 | ZFCP_STATUS_FSFREQ_RETRY; 1300 break; 1301 1302 case FSF_LUN_BOXED: 1303 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n"); 1304 ZFCP_LOG_INFO( 1305 "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " 1306 "to be reopened\n", 1307 unit->fcp_lun, unit->port->wwpn, 1308 zfcp_get_busid_by_unit(unit)); 1309 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 1310 zfcp_erp_unit_reopen(unit, 0); 1311 zfcp_cmd_dbf_event_fsf("unitbox", new_fsf_req, 1312 &new_fsf_req->qtcb->header.fsf_status_qual, 1313 sizeof(union fsf_status_qual)); 1314 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1315 | ZFCP_STATUS_FSFREQ_RETRY; 1316 break; 1317 1318 case FSF_ADAPTER_STATUS_AVAILABLE: 1319 /* 2 */ 1320 ZFCP_LOG_FLAGS(0, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 1321 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { 1322 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1323 ZFCP_LOG_FLAGS(2, 1324 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 1325 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1326 "fsf_sq_ltest"); 1327 /* reopening link to port */ 1328 zfcp_erp_port_reopen(unit->port, 0); 1329 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1330 break; 1331 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1332 ZFCP_LOG_FLAGS(2, 1333 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 1334 /* SCSI stack will escalate */ 1335 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, 1336 "fsf_sq_ulp"); 1337 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1338 break; 1339 default: 1340 ZFCP_LOG_NORMAL 1341 ("bug: Wrong status qualifier 0x%x arrived.\n", 1342 new_fsf_req->qtcb->header.fsf_status_qual.word[0]); 1343 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1344 "fsf_sq_inval:"); 1345 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1346 &new_fsf_req->qtcb->header. 1347 fsf_status_qual.word[0], sizeof (u32)); 1348 break; 1349 } 1350 break; 1351 1352 case FSF_GOOD: 1353 /* 3 */ 1354 ZFCP_LOG_FLAGS(0, "FSF_GOOD\n"); 1355 retval = 0; 1356 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 1357 break; 1358 1359 default: 1360 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1361 "(debug info 0x%x)\n", 1362 new_fsf_req->qtcb->header.fsf_status); 1363 debug_text_event(new_fsf_req->adapter->erp_dbf, 0, 1364 "fsf_s_inval:"); 1365 debug_exception(new_fsf_req->adapter->erp_dbf, 0, 1366 &new_fsf_req->qtcb->header.fsf_status, 1367 sizeof (u32)); 1368 break; 1369 } 1370 skip_fsfstatus: 1371 return retval; 1372 } 1373 1374 /** 1375 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into 1376 * one SBALE 1377 * Two scatter-gather lists are passed, one for the reqeust and one for the 1378 * response. 1379 */ 1380 static inline int 1381 zfcp_use_one_sbal(struct scatterlist *req, int req_count, 1382 struct scatterlist *resp, int resp_count) 1383 { 1384 return ((req_count == 1) && 1385 (resp_count == 1) && 1386 (((unsigned long) zfcp_sg_to_address(&req[0]) & 1387 PAGE_MASK) == 1388 ((unsigned long) (zfcp_sg_to_address(&req[0]) + 1389 req[0].length - 1) & PAGE_MASK)) && 1390 (((unsigned long) zfcp_sg_to_address(&resp[0]) & 1391 PAGE_MASK) == 1392 ((unsigned long) (zfcp_sg_to_address(&resp[0]) + 1393 resp[0].length - 1) & PAGE_MASK))); 1394 } 1395 1396 /** 1397 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1398 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for 1399 * the request 1400 * @pool: pointer to memory pool, if non-null this pool is used to allocate 1401 * a struct zfcp_fsf_req 1402 * @erp_action: pointer to erp_action, if non-null the Generic Service request 1403 * is sent within error recovery 1404 */ 1405 int 1406 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, 1407 struct zfcp_erp_action *erp_action) 1408 { 1409 volatile struct qdio_buffer_element *sbale; 1410 struct zfcp_port *port; 1411 struct zfcp_adapter *adapter; 1412 struct zfcp_fsf_req *fsf_req; 1413 unsigned long lock_flags; 1414 int bytes; 1415 int ret = 0; 1416 1417 port = ct->port; 1418 adapter = port->adapter; 1419 1420 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, 1421 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 1422 pool, &lock_flags, &fsf_req); 1423 if (ret < 0) { 1424 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " 1425 "adapter: %s\n", 1426 zfcp_get_busid_by_adapter(adapter)); 1427 goto failed_req; 1428 } 1429 1430 if (erp_action != NULL) { 1431 erp_action->fsf_req = fsf_req; 1432 fsf_req->erp_action = erp_action; 1433 } 1434 1435 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1436 if (zfcp_use_one_sbal(ct->req, ct->req_count, 1437 ct->resp, ct->resp_count)){ 1438 /* both request buffer and response buffer 1439 fit into one sbale each */ 1440 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1441 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); 1442 sbale[2].length = ct->req[0].length; 1443 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); 1444 sbale[3].length = ct->resp[0].length; 1445 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1446 } else if (adapter->supported_features & 1447 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1448 /* try to use chained SBALs */ 1449 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1450 SBAL_FLAGS0_TYPE_WRITE_READ, 1451 ct->req, ct->req_count, 1452 ZFCP_MAX_SBALS_PER_CT_REQ); 1453 if (bytes <= 0) { 1454 ZFCP_LOG_INFO("error: creation of CT request failed " 1455 "on adapter %s\n", 1456 zfcp_get_busid_by_adapter(adapter)); 1457 if (bytes == 0) 1458 ret = -ENOMEM; 1459 else 1460 ret = bytes; 1461 1462 goto failed_send; 1463 } 1464 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1465 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1466 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1467 SBAL_FLAGS0_TYPE_WRITE_READ, 1468 ct->resp, ct->resp_count, 1469 ZFCP_MAX_SBALS_PER_CT_REQ); 1470 if (bytes <= 0) { 1471 ZFCP_LOG_INFO("error: creation of CT request failed " 1472 "on adapter %s\n", 1473 zfcp_get_busid_by_adapter(adapter)); 1474 if (bytes == 0) 1475 ret = -ENOMEM; 1476 else 1477 ret = bytes; 1478 1479 goto failed_send; 1480 } 1481 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1482 } else { 1483 /* reject send generic request */ 1484 ZFCP_LOG_INFO( 1485 "error: microcode does not support chained SBALs," 1486 "CT request too big (adapter %s)\n", 1487 zfcp_get_busid_by_adapter(adapter)); 1488 ret = -EOPNOTSUPP; 1489 goto failed_send; 1490 } 1491 1492 /* settings in QTCB */ 1493 fsf_req->qtcb->header.port_handle = port->handle; 1494 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class; 1495 fsf_req->qtcb->bottom.support.timeout = ct->timeout; 1496 fsf_req->data.send_ct = ct; 1497 1498 /* start QDIO request for this FSF request */ 1499 ret = zfcp_fsf_req_send(fsf_req, ct->timer); 1500 if (ret) { 1501 ZFCP_LOG_DEBUG("error: initiation of CT request failed " 1502 "(adapter %s, port 0x%016Lx)\n", 1503 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1504 goto failed_send; 1505 } 1506 1507 ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", 1508 zfcp_get_busid_by_adapter(adapter), port->wwpn); 1509 goto out; 1510 1511 failed_send: 1512 zfcp_fsf_req_free(fsf_req); 1513 if (erp_action != NULL) { 1514 erp_action->fsf_req = NULL; 1515 } 1516 failed_req: 1517 out: 1518 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1519 lock_flags); 1520 return ret; 1521 } 1522 1523 /** 1524 * zfcp_fsf_send_ct_handler - handler for Generic Service requests 1525 * @fsf_req: pointer to struct zfcp_fsf_req 1526 * 1527 * Data specific for the Generic Service request is passed by 1528 * fsf_req->data.send_ct 1529 * Usually a specific handler for the request is called via 1530 * fsf_req->data.send_ct->handler at end of this function. 1531 */ 1532 static int 1533 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) 1534 { 1535 struct zfcp_port *port; 1536 struct zfcp_adapter *adapter; 1537 struct zfcp_send_ct *send_ct; 1538 struct fsf_qtcb_header *header; 1539 struct fsf_qtcb_bottom_support *bottom; 1540 int retval = -EINVAL; 1541 u16 subtable, rule, counter; 1542 1543 adapter = fsf_req->adapter; 1544 send_ct = fsf_req->data.send_ct; 1545 port = send_ct->port; 1546 header = &fsf_req->qtcb->header; 1547 bottom = &fsf_req->qtcb->bottom.support; 1548 1549 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1550 goto skip_fsfstatus; 1551 1552 /* evaluate FSF status in QTCB */ 1553 switch (header->fsf_status) { 1554 1555 case FSF_GOOD: 1556 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n"); 1557 retval = 0; 1558 break; 1559 1560 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1561 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n"); 1562 if (adapter->fc_service_class <= 3) { 1563 ZFCP_LOG_INFO("error: adapter %s does not support fc " 1564 "class %d.\n", 1565 zfcp_get_busid_by_port(port), 1566 adapter->fc_service_class); 1567 } else { 1568 ZFCP_LOG_INFO("bug: The fibre channel class at the " 1569 "adapter %s is invalid. " 1570 "(debug info %d)\n", 1571 zfcp_get_busid_by_port(port), 1572 adapter->fc_service_class); 1573 } 1574 /* stop operation for this adapter */ 1575 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1576 zfcp_erp_adapter_shutdown(adapter, 0); 1577 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1578 break; 1579 1580 case FSF_ADAPTER_STATUS_AVAILABLE: 1581 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 1582 switch (header->fsf_status_qual.word[0]){ 1583 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1584 ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 1585 /* reopening link to port */ 1586 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1587 zfcp_test_link(port); 1588 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1589 break; 1590 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1591 ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 1592 /* ERP strategy will escalate */ 1593 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1594 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1595 break; 1596 default: 1597 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " 1598 "arrived.\n", 1599 header->fsf_status_qual.word[0]); 1600 break; 1601 } 1602 break; 1603 1604 case FSF_ACCESS_DENIED: 1605 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 1606 ZFCP_LOG_NORMAL("access denied, cannot send generic service " 1607 "command (adapter %s, port d_id=0x%08x)\n", 1608 zfcp_get_busid_by_port(port), port->d_id); 1609 for (counter = 0; counter < 2; counter++) { 1610 subtable = header->fsf_status_qual.halfword[counter * 2]; 1611 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1612 switch (subtable) { 1613 case FSF_SQ_CFDC_SUBTABLE_OS: 1614 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1615 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1616 case FSF_SQ_CFDC_SUBTABLE_LUN: 1617 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1618 zfcp_act_subtable_type[subtable], rule); 1619 break; 1620 } 1621 } 1622 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 1623 zfcp_erp_port_access_denied(port); 1624 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1625 break; 1626 1627 case FSF_GENERIC_COMMAND_REJECTED: 1628 ZFCP_LOG_FLAGS(2, "FSF_GENERIC_COMMAND_REJECTED\n"); 1629 ZFCP_LOG_INFO("generic service command rejected " 1630 "(adapter %s, port d_id=0x%08x)\n", 1631 zfcp_get_busid_by_port(port), port->d_id); 1632 ZFCP_LOG_INFO("status qualifier:\n"); 1633 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1634 (char *) &header->fsf_status_qual, 1635 sizeof (union fsf_status_qual)); 1636 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej"); 1637 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1638 break; 1639 1640 case FSF_PORT_HANDLE_NOT_VALID: 1641 ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n"); 1642 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " 1643 "0x%016Lx on adapter %s invalid. This may " 1644 "happen occasionally.\n", port->handle, 1645 port->wwpn, zfcp_get_busid_by_port(port)); 1646 ZFCP_LOG_INFO("status qualifier:\n"); 1647 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1648 (char *) &header->fsf_status_qual, 1649 sizeof (union fsf_status_qual)); 1650 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv"); 1651 zfcp_erp_adapter_reopen(adapter, 0); 1652 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1653 break; 1654 1655 case FSF_PORT_BOXED: 1656 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 1657 ZFCP_LOG_INFO("port needs to be reopened " 1658 "(adapter %s, port d_id=0x%08x)\n", 1659 zfcp_get_busid_by_port(port), port->d_id); 1660 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 1661 zfcp_erp_port_reopen(port, 0); 1662 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 1663 | ZFCP_STATUS_FSFREQ_RETRY; 1664 break; 1665 1666 /* following states should never occure, all cases avoided 1667 in zfcp_fsf_send_ct - but who knows ... */ 1668 case FSF_PAYLOAD_SIZE_MISMATCH: 1669 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n"); 1670 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " 1671 "req_buf_length=%d, resp_buf_length=%d)\n", 1672 zfcp_get_busid_by_adapter(adapter), 1673 bottom->req_buf_length, bottom->resp_buf_length); 1674 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1675 break; 1676 case FSF_REQUEST_SIZE_TOO_LARGE: 1677 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n"); 1678 ZFCP_LOG_INFO("request size too large (adapter: %s, " 1679 "req_buf_length=%d)\n", 1680 zfcp_get_busid_by_adapter(adapter), 1681 bottom->req_buf_length); 1682 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1683 break; 1684 case FSF_RESPONSE_SIZE_TOO_LARGE: 1685 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n"); 1686 ZFCP_LOG_INFO("response size too large (adapter: %s, " 1687 "resp_buf_length=%d)\n", 1688 zfcp_get_busid_by_adapter(adapter), 1689 bottom->resp_buf_length); 1690 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1691 break; 1692 case FSF_SBAL_MISMATCH: 1693 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n"); 1694 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1695 "resp_buf_length=%d)\n", 1696 zfcp_get_busid_by_adapter(adapter), 1697 bottom->req_buf_length, bottom->resp_buf_length); 1698 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1699 break; 1700 1701 default: 1702 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 1703 "(debug info 0x%x)\n", header->fsf_status); 1704 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); 1705 debug_exception(adapter->erp_dbf, 0, 1706 &header->fsf_status_qual.word[0], sizeof (u32)); 1707 break; 1708 } 1709 1710 skip_fsfstatus: 1711 send_ct->status = retval; 1712 1713 if (send_ct->handler != NULL) 1714 send_ct->handler(send_ct->handler_data); 1715 1716 return retval; 1717 } 1718 1719 /** 1720 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1721 * @els: pointer to struct zfcp_send_els which contains all needed data for 1722 * the command. 1723 */ 1724 int 1725 zfcp_fsf_send_els(struct zfcp_send_els *els) 1726 { 1727 volatile struct qdio_buffer_element *sbale; 1728 struct zfcp_fsf_req *fsf_req; 1729 fc_id_t d_id; 1730 struct zfcp_adapter *adapter; 1731 unsigned long lock_flags; 1732 int bytes; 1733 int ret = 0; 1734 1735 d_id = els->d_id; 1736 adapter = els->adapter; 1737 1738 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, 1739 ZFCP_REQ_AUTO_CLEANUP, 1740 NULL, &lock_flags, &fsf_req); 1741 if (ret < 0) { 1742 ZFCP_LOG_INFO("error: creation of ELS request failed " 1743 "(adapter %s, port d_id: 0x%08x)\n", 1744 zfcp_get_busid_by_adapter(adapter), d_id); 1745 goto failed_req; 1746 } 1747 1748 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1749 if (zfcp_use_one_sbal(els->req, els->req_count, 1750 els->resp, els->resp_count)){ 1751 /* both request buffer and response buffer 1752 fit into one sbale each */ 1753 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; 1754 sbale[2].addr = zfcp_sg_to_address(&els->req[0]); 1755 sbale[2].length = els->req[0].length; 1756 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); 1757 sbale[3].length = els->resp[0].length; 1758 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; 1759 } else if (adapter->supported_features & 1760 FSF_FEATURE_ELS_CT_CHAINED_SBALS) { 1761 /* try to use chained SBALs */ 1762 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1763 SBAL_FLAGS0_TYPE_WRITE_READ, 1764 els->req, els->req_count, 1765 ZFCP_MAX_SBALS_PER_ELS_REQ); 1766 if (bytes <= 0) { 1767 ZFCP_LOG_INFO("error: creation of ELS request failed " 1768 "(adapter %s, port d_id: 0x%08x)\n", 1769 zfcp_get_busid_by_adapter(adapter), d_id); 1770 if (bytes == 0) { 1771 ret = -ENOMEM; 1772 } else { 1773 ret = bytes; 1774 } 1775 goto failed_send; 1776 } 1777 fsf_req->qtcb->bottom.support.req_buf_length = bytes; 1778 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; 1779 bytes = zfcp_qdio_sbals_from_sg(fsf_req, 1780 SBAL_FLAGS0_TYPE_WRITE_READ, 1781 els->resp, els->resp_count, 1782 ZFCP_MAX_SBALS_PER_ELS_REQ); 1783 if (bytes <= 0) { 1784 ZFCP_LOG_INFO("error: creation of ELS request failed " 1785 "(adapter %s, port d_id: 0x%08x)\n", 1786 zfcp_get_busid_by_adapter(adapter), d_id); 1787 if (bytes == 0) { 1788 ret = -ENOMEM; 1789 } else { 1790 ret = bytes; 1791 } 1792 goto failed_send; 1793 } 1794 fsf_req->qtcb->bottom.support.resp_buf_length = bytes; 1795 } else { 1796 /* reject request */ 1797 ZFCP_LOG_INFO("error: microcode does not support chained SBALs" 1798 ", ELS request too big (adapter %s, " 1799 "port d_id: 0x%08x)\n", 1800 zfcp_get_busid_by_adapter(adapter), d_id); 1801 ret = -EOPNOTSUPP; 1802 goto failed_send; 1803 } 1804 1805 /* settings in QTCB */ 1806 fsf_req->qtcb->bottom.support.d_id = d_id; 1807 fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class; 1808 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; 1809 fsf_req->data.send_els = els; 1810 1811 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 1812 1813 /* start QDIO request for this FSF request */ 1814 ret = zfcp_fsf_req_send(fsf_req, els->timer); 1815 if (ret) { 1816 ZFCP_LOG_DEBUG("error: initiation of ELS request failed " 1817 "(adapter %s, port d_id: 0x%08x)\n", 1818 zfcp_get_busid_by_adapter(adapter), d_id); 1819 goto failed_send; 1820 } 1821 1822 ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " 1823 "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); 1824 goto out; 1825 1826 failed_send: 1827 zfcp_fsf_req_free(fsf_req); 1828 1829 failed_req: 1830 out: 1831 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 1832 lock_flags); 1833 1834 return ret; 1835 } 1836 1837 /** 1838 * zfcp_fsf_send_els_handler - handler for ELS commands 1839 * @fsf_req: pointer to struct zfcp_fsf_req 1840 * 1841 * Data specific for the ELS command is passed by 1842 * fsf_req->data.send_els 1843 * Usually a specific handler for the command is called via 1844 * fsf_req->data.send_els->handler at end of this function. 1845 */ 1846 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) 1847 { 1848 struct zfcp_adapter *adapter; 1849 fc_id_t d_id; 1850 struct zfcp_port *port; 1851 struct fsf_qtcb_header *header; 1852 struct fsf_qtcb_bottom_support *bottom; 1853 struct zfcp_send_els *send_els; 1854 int retval = -EINVAL; 1855 u16 subtable, rule, counter; 1856 1857 send_els = fsf_req->data.send_els; 1858 adapter = send_els->adapter; 1859 d_id = send_els->d_id; 1860 header = &fsf_req->qtcb->header; 1861 bottom = &fsf_req->qtcb->bottom.support; 1862 1863 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 1864 goto skip_fsfstatus; 1865 1866 switch (header->fsf_status) { 1867 1868 case FSF_GOOD: 1869 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n"); 1870 retval = 0; 1871 break; 1872 1873 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1874 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n"); 1875 if (adapter->fc_service_class <= 3) { 1876 ZFCP_LOG_INFO("error: adapter %s does " 1877 "not support fibrechannel class %d.\n", 1878 zfcp_get_busid_by_adapter(adapter), 1879 adapter->fc_service_class); 1880 } else { 1881 ZFCP_LOG_INFO("bug: The fibrechannel class at " 1882 "adapter %s is invalid. " 1883 "(debug info %d)\n", 1884 zfcp_get_busid_by_adapter(adapter), 1885 adapter->fc_service_class); 1886 } 1887 /* stop operation for this adapter */ 1888 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); 1889 zfcp_erp_adapter_shutdown(adapter, 0); 1890 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1891 break; 1892 1893 case FSF_ADAPTER_STATUS_AVAILABLE: 1894 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 1895 switch (header->fsf_status_qual.word[0]){ 1896 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1897 ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 1898 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); 1899 if (send_els->ls_code != ZFCP_LS_ADISC) { 1900 read_lock(&zfcp_data.config_lock); 1901 port = zfcp_get_port_by_did(adapter, d_id); 1902 if (port) 1903 zfcp_test_link(port); 1904 read_unlock(&zfcp_data.config_lock); 1905 } 1906 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1907 break; 1908 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1909 ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 1910 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); 1911 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1912 retval = 1913 zfcp_handle_els_rjt(header->fsf_status_qual.word[1], 1914 (struct zfcp_ls_rjt_par *) 1915 &header->fsf_status_qual.word[2]); 1916 break; 1917 case FSF_SQ_RETRY_IF_POSSIBLE: 1918 ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n"); 1919 debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry"); 1920 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1921 break; 1922 default: 1923 ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", 1924 header->fsf_status_qual.word[0]); 1925 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, 1926 (char*)header->fsf_status_qual.word, 16); 1927 } 1928 break; 1929 1930 case FSF_ELS_COMMAND_REJECTED: 1931 ZFCP_LOG_FLAGS(2, "FSF_ELS_COMMAND_REJECTED\n"); 1932 ZFCP_LOG_INFO("ELS has been rejected because command filter " 1933 "prohibited sending " 1934 "(adapter: %s, port d_id: 0x%08x)\n", 1935 zfcp_get_busid_by_adapter(adapter), d_id); 1936 1937 break; 1938 1939 case FSF_PAYLOAD_SIZE_MISMATCH: 1940 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n"); 1941 ZFCP_LOG_INFO( 1942 "ELS request size and ELS response size must be either " 1943 "both 0, or both greater than 0 " 1944 "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", 1945 zfcp_get_busid_by_adapter(adapter), 1946 bottom->req_buf_length, 1947 bottom->resp_buf_length); 1948 break; 1949 1950 case FSF_REQUEST_SIZE_TOO_LARGE: 1951 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n"); 1952 ZFCP_LOG_INFO( 1953 "Length of the ELS request buffer, " 1954 "specified in QTCB bottom, " 1955 "exceeds the size of the buffers " 1956 "that have been allocated for ELS request data " 1957 "(adapter: %s, req_buf_length=%d)\n", 1958 zfcp_get_busid_by_adapter(adapter), 1959 bottom->req_buf_length); 1960 break; 1961 1962 case FSF_RESPONSE_SIZE_TOO_LARGE: 1963 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n"); 1964 ZFCP_LOG_INFO( 1965 "Length of the ELS response buffer, " 1966 "specified in QTCB bottom, " 1967 "exceeds the size of the buffers " 1968 "that have been allocated for ELS response data " 1969 "(adapter: %s, resp_buf_length=%d)\n", 1970 zfcp_get_busid_by_adapter(adapter), 1971 bottom->resp_buf_length); 1972 break; 1973 1974 case FSF_SBAL_MISMATCH: 1975 /* should never occure, avoided in zfcp_fsf_send_els */ 1976 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n"); 1977 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " 1978 "resp_buf_length=%d)\n", 1979 zfcp_get_busid_by_adapter(adapter), 1980 bottom->req_buf_length, bottom->resp_buf_length); 1981 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1982 break; 1983 1984 case FSF_ACCESS_DENIED: 1985 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 1986 ZFCP_LOG_NORMAL("access denied, cannot send ELS command " 1987 "(adapter %s, port d_id=0x%08x)\n", 1988 zfcp_get_busid_by_adapter(adapter), d_id); 1989 for (counter = 0; counter < 2; counter++) { 1990 subtable = header->fsf_status_qual.halfword[counter * 2]; 1991 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 1992 switch (subtable) { 1993 case FSF_SQ_CFDC_SUBTABLE_OS: 1994 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 1995 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 1996 case FSF_SQ_CFDC_SUBTABLE_LUN: 1997 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 1998 zfcp_act_subtable_type[subtable], rule); 1999 break; 2000 } 2001 } 2002 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 2003 read_lock(&zfcp_data.config_lock); 2004 port = zfcp_get_port_by_did(adapter, d_id); 2005 if (port != NULL) 2006 zfcp_erp_port_access_denied(port); 2007 read_unlock(&zfcp_data.config_lock); 2008 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2009 break; 2010 2011 default: 2012 ZFCP_LOG_NORMAL( 2013 "bug: An unknown FSF Status was presented " 2014 "(adapter: %s, fsf_status=0x%08x)\n", 2015 zfcp_get_busid_by_adapter(adapter), 2016 header->fsf_status); 2017 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval"); 2018 debug_exception(adapter->erp_dbf, 0, 2019 &header->fsf_status_qual.word[0], sizeof(u32)); 2020 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2021 break; 2022 } 2023 2024 skip_fsfstatus: 2025 send_els->status = retval; 2026 2027 if (send_els->handler != 0) 2028 send_els->handler(send_els->handler_data); 2029 2030 return retval; 2031 } 2032 2033 /* 2034 * function: 2035 * 2036 * purpose: 2037 * 2038 * returns: address of initiated FSF request 2039 * NULL - request could not be initiated 2040 */ 2041 int 2042 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 2043 { 2044 volatile struct qdio_buffer_element *sbale; 2045 unsigned long lock_flags; 2046 int retval = 0; 2047 2048 /* setup new FSF request */ 2049 retval = zfcp_fsf_req_create(erp_action->adapter, 2050 FSF_QTCB_EXCHANGE_CONFIG_DATA, 2051 ZFCP_REQ_AUTO_CLEANUP, 2052 erp_action->adapter->pool.fsf_req_erp, 2053 &lock_flags, &(erp_action->fsf_req)); 2054 if (retval < 0) { 2055 ZFCP_LOG_INFO("error: Could not create exchange configuration " 2056 "data request for adapter %s.\n", 2057 zfcp_get_busid_by_adapter(erp_action->adapter)); 2058 goto out; 2059 } 2060 2061 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2062 erp_action->fsf_req->sbal_curr, 0); 2063 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2064 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2065 2066 erp_action->fsf_req->erp_action = erp_action; 2067 erp_action->fsf_req->qtcb->bottom.config.feature_selection = 2068 (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING); 2069 2070 /* start QDIO request for this FSF request */ 2071 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2072 if (retval) { 2073 ZFCP_LOG_INFO 2074 ("error: Could not send exchange configuration data " 2075 "command on the adapter %s\n", 2076 zfcp_get_busid_by_adapter(erp_action->adapter)); 2077 zfcp_fsf_req_free(erp_action->fsf_req); 2078 erp_action->fsf_req = NULL; 2079 goto out; 2080 } 2081 2082 ZFCP_LOG_DEBUG("exchange configuration data request initiated " 2083 "(adapter %s)\n", 2084 zfcp_get_busid_by_adapter(erp_action->adapter)); 2085 2086 out: 2087 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2088 lock_flags); 2089 return retval; 2090 } 2091 2092 /** 2093 * zfcp_fsf_exchange_config_evaluate 2094 * @fsf_req: fsf_req which belongs to xchg config data request 2095 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) 2096 * 2097 * returns: -EIO on error, 0 otherwise 2098 */ 2099 static int 2100 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) 2101 { 2102 struct fsf_qtcb_bottom_config *bottom; 2103 struct zfcp_adapter *adapter = fsf_req->adapter; 2104 2105 bottom = &fsf_req->qtcb->bottom.config; 2106 ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", 2107 bottom->low_qtcb_version, bottom->high_qtcb_version); 2108 adapter->fsf_lic_version = bottom->lic_version; 2109 adapter->supported_features = bottom->supported_features; 2110 adapter->peer_wwpn = 0; 2111 adapter->peer_wwnn = 0; 2112 adapter->peer_d_id = 0; 2113 2114 if (xchg_ok) { 2115 adapter->wwnn = bottom->nport_serv_param.wwnn; 2116 adapter->wwpn = bottom->nport_serv_param.wwpn; 2117 adapter->s_id = bottom->s_id & ZFCP_DID_MASK; 2118 adapter->fc_topology = bottom->fc_topology; 2119 adapter->fc_link_speed = bottom->fc_link_speed; 2120 adapter->hydra_version = bottom->adapter_type; 2121 } else { 2122 adapter->wwnn = 0; 2123 adapter->wwpn = 0; 2124 adapter->s_id = 0; 2125 adapter->fc_topology = 0; 2126 adapter->fc_link_speed = 0; 2127 adapter->hydra_version = 0; 2128 } 2129 2130 if (adapter->fc_topology == FSF_TOPO_P2P) { 2131 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; 2132 adapter->peer_wwpn = bottom->plogi_payload.wwpn; 2133 adapter->peer_wwnn = bottom->plogi_payload.wwnn; 2134 } 2135 2136 if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){ 2137 adapter->hardware_version = bottom->hardware_version; 2138 memcpy(adapter->serial_number, bottom->serial_number, 17); 2139 EBCASC(adapter->serial_number, sizeof(adapter->serial_number)); 2140 } 2141 2142 ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n" 2143 "WWNN 0x%016Lx, " 2144 "WWPN 0x%016Lx, " 2145 "S_ID 0x%08x,\n" 2146 "adapter version 0x%x, " 2147 "LIC version 0x%x, " 2148 "FC link speed %d Gb/s\n", 2149 zfcp_get_busid_by_adapter(adapter), 2150 adapter->wwnn, 2151 adapter->wwpn, 2152 (unsigned int) adapter->s_id, 2153 adapter->hydra_version, 2154 adapter->fsf_lic_version, 2155 adapter->fc_link_speed); 2156 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { 2157 ZFCP_LOG_NORMAL("error: the adapter %s " 2158 "only supports newer control block " 2159 "versions in comparison to this device " 2160 "driver (try updated device driver)\n", 2161 zfcp_get_busid_by_adapter(adapter)); 2162 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); 2163 zfcp_erp_adapter_shutdown(adapter, 0); 2164 return -EIO; 2165 } 2166 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { 2167 ZFCP_LOG_NORMAL("error: the adapter %s " 2168 "only supports older control block " 2169 "versions than this device driver uses" 2170 "(consider a microcode upgrade)\n", 2171 zfcp_get_busid_by_adapter(adapter)); 2172 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); 2173 zfcp_erp_adapter_shutdown(adapter, 0); 2174 return -EIO; 2175 } 2176 return 0; 2177 } 2178 2179 /* 2180 * function: zfcp_fsf_exchange_config_data_handler 2181 * 2182 * purpose: is called for finished Exchange Configuration Data command 2183 * 2184 * returns: 2185 */ 2186 static int 2187 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) 2188 { 2189 struct fsf_qtcb_bottom_config *bottom; 2190 struct zfcp_adapter *adapter = fsf_req->adapter; 2191 2192 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2193 return -EIO; 2194 2195 switch (fsf_req->qtcb->header.fsf_status) { 2196 2197 case FSF_GOOD: 2198 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n"); 2199 2200 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) 2201 return -EIO; 2202 2203 switch (adapter->fc_topology) { 2204 case FSF_TOPO_P2P: 2205 ZFCP_LOG_FLAGS(1, "FSF_TOPO_P2P\n"); 2206 ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " 2207 "configuration detected at adapter %s\n" 2208 "Peer WWNN 0x%016llx, " 2209 "peer WWPN 0x%016llx, " 2210 "peer d_id 0x%06x\n", 2211 zfcp_get_busid_by_adapter(adapter), 2212 adapter->peer_wwnn, 2213 adapter->peer_wwpn, 2214 adapter->peer_d_id); 2215 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2216 "top-p-to-p"); 2217 break; 2218 case FSF_TOPO_AL: 2219 ZFCP_LOG_FLAGS(1, "FSF_TOPO_AL\n"); 2220 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " 2221 "topology detected at adapter %s " 2222 "unsupported, shutting down adapter\n", 2223 zfcp_get_busid_by_adapter(adapter)); 2224 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2225 "top-al"); 2226 zfcp_erp_adapter_shutdown(adapter, 0); 2227 return -EIO; 2228 case FSF_TOPO_FABRIC: 2229 ZFCP_LOG_FLAGS(1, "FSF_TOPO_FABRIC\n"); 2230 ZFCP_LOG_INFO("Switched fabric fibrechannel " 2231 "network detected at adapter %s.\n", 2232 zfcp_get_busid_by_adapter(adapter)); 2233 break; 2234 default: 2235 ZFCP_LOG_NORMAL("bug: The fibrechannel topology " 2236 "reported by the exchange " 2237 "configuration command for " 2238 "the adapter %s is not " 2239 "of a type known to the zfcp " 2240 "driver, shutting down adapter\n", 2241 zfcp_get_busid_by_adapter(adapter)); 2242 adapter->fc_topology = FSF_TOPO_ERROR; 2243 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2244 "unknown-topo"); 2245 zfcp_erp_adapter_shutdown(adapter, 0); 2246 return -EIO; 2247 } 2248 bottom = &fsf_req->qtcb->bottom.config; 2249 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 2250 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " 2251 "allowed by the adapter %s " 2252 "is lower than the minimum " 2253 "required by the driver (%ld bytes).\n", 2254 bottom->max_qtcb_size, 2255 zfcp_get_busid_by_adapter(adapter), 2256 sizeof(struct fsf_qtcb)); 2257 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2258 "qtcb-size"); 2259 debug_event(fsf_req->adapter->erp_dbf, 0, 2260 &bottom->max_qtcb_size, sizeof (u32)); 2261 zfcp_erp_adapter_shutdown(adapter, 0); 2262 return -EIO; 2263 } 2264 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 2265 &adapter->status); 2266 break; 2267 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2268 debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); 2269 2270 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) 2271 return -EIO; 2272 2273 ZFCP_LOG_INFO("Local link to adapter %s is down\n", 2274 zfcp_get_busid_by_adapter(adapter)); 2275 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | 2276 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 2277 &adapter->status); 2278 zfcp_erp_adapter_failed(adapter); 2279 break; 2280 default: 2281 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); 2282 debug_event(fsf_req->adapter->erp_dbf, 0, 2283 &fsf_req->qtcb->header.fsf_status, sizeof (u32)); 2284 zfcp_erp_adapter_shutdown(adapter, 0); 2285 return -EIO; 2286 } 2287 return 0; 2288 } 2289 2290 /** 2291 * zfcp_fsf_exchange_port_data - request information about local port 2292 * @adapter: for which port data is requested 2293 * @data: response to exchange port data request 2294 */ 2295 int 2296 zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter, 2297 struct fsf_qtcb_bottom_port *data) 2298 { 2299 volatile struct qdio_buffer_element *sbale; 2300 int retval = 0; 2301 unsigned long lock_flags; 2302 struct zfcp_fsf_req *fsf_req; 2303 struct timer_list *timer; 2304 2305 if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){ 2306 ZFCP_LOG_INFO("error: exchange port data " 2307 "command not supported by adapter %s\n", 2308 zfcp_get_busid_by_adapter(adapter)); 2309 return -EOPNOTSUPP; 2310 } 2311 2312 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); 2313 if (!timer) 2314 return -ENOMEM; 2315 2316 /* setup new FSF request */ 2317 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 2318 0, 0, &lock_flags, &fsf_req); 2319 if (retval < 0) { 2320 ZFCP_LOG_INFO("error: Out of resources. Could not create an " 2321 "exchange port data request for" 2322 "the adapter %s.\n", 2323 zfcp_get_busid_by_adapter(adapter)); 2324 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2325 lock_flags); 2326 goto out; 2327 } 2328 2329 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2330 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2331 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2332 2333 fsf_req->data.port_data = data; 2334 2335 init_timer(timer); 2336 timer->function = zfcp_fsf_request_timeout_handler; 2337 timer->data = (unsigned long) adapter; 2338 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; 2339 2340 retval = zfcp_fsf_req_send(fsf_req, timer); 2341 if (retval) { 2342 ZFCP_LOG_INFO("error: Could not send an exchange port data " 2343 "command on the adapter %s\n", 2344 zfcp_get_busid_by_adapter(adapter)); 2345 zfcp_fsf_req_free(fsf_req); 2346 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2347 lock_flags); 2348 goto out; 2349 } 2350 2351 ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n", 2352 zfcp_get_busid_by_adapter(adapter)); 2353 2354 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2355 lock_flags); 2356 2357 wait_event(fsf_req->completion_wq, 2358 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 2359 del_timer_sync(timer); 2360 zfcp_fsf_req_cleanup(fsf_req); 2361 out: 2362 kfree(timer); 2363 return retval; 2364 } 2365 2366 2367 /** 2368 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request 2369 * @fsf_req: pointer to struct zfcp_fsf_req 2370 */ 2371 static void 2372 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) 2373 { 2374 struct fsf_qtcb_bottom_port *bottom; 2375 struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data; 2376 2377 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2378 return; 2379 2380 switch (fsf_req->qtcb->header.fsf_status) { 2381 case FSF_GOOD: 2382 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n"); 2383 bottom = &fsf_req->qtcb->bottom.port; 2384 memcpy(data, bottom, sizeof(*data)); 2385 break; 2386 2387 default: 2388 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng"); 2389 debug_event(fsf_req->adapter->erp_dbf, 0, 2390 &fsf_req->qtcb->header.fsf_status, sizeof(u32)); 2391 } 2392 } 2393 2394 2395 /* 2396 * function: zfcp_fsf_open_port 2397 * 2398 * purpose: 2399 * 2400 * returns: address of initiated FSF request 2401 * NULL - request could not be initiated 2402 */ 2403 int 2404 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 2405 { 2406 volatile struct qdio_buffer_element *sbale; 2407 unsigned long lock_flags; 2408 int retval = 0; 2409 2410 /* setup new FSF request */ 2411 retval = zfcp_fsf_req_create(erp_action->adapter, 2412 FSF_QTCB_OPEN_PORT_WITH_DID, 2413 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2414 erp_action->adapter->pool.fsf_req_erp, 2415 &lock_flags, &(erp_action->fsf_req)); 2416 if (retval < 0) { 2417 ZFCP_LOG_INFO("error: Could not create open port request " 2418 "for port 0x%016Lx on adapter %s.\n", 2419 erp_action->port->wwpn, 2420 zfcp_get_busid_by_adapter(erp_action->adapter)); 2421 goto out; 2422 } 2423 2424 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2425 erp_action->fsf_req->sbal_curr, 0); 2426 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2427 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2428 2429 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; 2430 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); 2431 erp_action->fsf_req->data.open_port.port = erp_action->port; 2432 erp_action->fsf_req->erp_action = erp_action; 2433 2434 /* start QDIO request for this FSF request */ 2435 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2436 if (retval) { 2437 ZFCP_LOG_INFO("error: Could not send open port request for " 2438 "port 0x%016Lx on adapter %s.\n", 2439 erp_action->port->wwpn, 2440 zfcp_get_busid_by_adapter(erp_action->adapter)); 2441 zfcp_fsf_req_free(erp_action->fsf_req); 2442 erp_action->fsf_req = NULL; 2443 goto out; 2444 } 2445 2446 ZFCP_LOG_DEBUG("open port request initiated " 2447 "(adapter %s, port 0x%016Lx)\n", 2448 zfcp_get_busid_by_adapter(erp_action->adapter), 2449 erp_action->port->wwpn); 2450 out: 2451 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2452 lock_flags); 2453 return retval; 2454 } 2455 2456 /* 2457 * function: zfcp_fsf_open_port_handler 2458 * 2459 * purpose: is called for finished Open Port command 2460 * 2461 * returns: 2462 */ 2463 static int 2464 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) 2465 { 2466 int retval = -EINVAL; 2467 struct zfcp_port *port; 2468 struct fsf_plogi *plogi; 2469 struct fsf_qtcb_header *header; 2470 u16 subtable, rule, counter; 2471 2472 port = fsf_req->data.open_port.port; 2473 header = &fsf_req->qtcb->header; 2474 2475 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2476 /* don't change port status in our bookkeeping */ 2477 goto skip_fsfstatus; 2478 } 2479 2480 /* evaluate FSF status in QTCB */ 2481 switch (header->fsf_status) { 2482 2483 case FSF_PORT_ALREADY_OPEN: 2484 ZFCP_LOG_FLAGS(0, "FSF_PORT_ALREADY_OPEN\n"); 2485 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " 2486 "is already open.\n", 2487 port->wwpn, zfcp_get_busid_by_port(port)); 2488 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2489 "fsf_s_popen"); 2490 /* 2491 * This is a bug, however operation should continue normally 2492 * if it is simply ignored 2493 */ 2494 break; 2495 2496 case FSF_ACCESS_DENIED: 2497 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 2498 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " 2499 "on adapter %s\n", 2500 port->wwpn, zfcp_get_busid_by_port(port)); 2501 for (counter = 0; counter < 2; counter++) { 2502 subtable = header->fsf_status_qual.halfword[counter * 2]; 2503 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2504 switch (subtable) { 2505 case FSF_SQ_CFDC_SUBTABLE_OS: 2506 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2507 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2508 case FSF_SQ_CFDC_SUBTABLE_LUN: 2509 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2510 zfcp_act_subtable_type[subtable], rule); 2511 break; 2512 } 2513 } 2514 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2515 zfcp_erp_port_access_denied(port); 2516 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2517 break; 2518 2519 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 2520 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED\n"); 2521 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " 2522 "The remote port 0x%016Lx on adapter %s " 2523 "could not be opened. Disabling it.\n", 2524 port->wwpn, zfcp_get_busid_by_port(port)); 2525 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2526 "fsf_s_max_ports"); 2527 zfcp_erp_port_failed(port); 2528 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2529 break; 2530 2531 case FSF_ADAPTER_STATUS_AVAILABLE: 2532 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 2533 switch (header->fsf_status_qual.word[0]) { 2534 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2535 ZFCP_LOG_FLAGS(2, 2536 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 2537 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2538 "fsf_sq_ltest"); 2539 /* ERP strategy will escalate */ 2540 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2541 break; 2542 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2543 /* ERP strategy will escalate */ 2544 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2545 "fsf_sq_ulp"); 2546 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2547 break; 2548 case FSF_SQ_NO_RETRY_POSSIBLE: 2549 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RETRY_POSSIBLE\n"); 2550 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " 2551 "adapter %s could not be opened. " 2552 "Disabling it.\n", 2553 port->wwpn, 2554 zfcp_get_busid_by_port(port)); 2555 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2556 "fsf_sq_no_retry"); 2557 zfcp_erp_port_failed(port); 2558 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2559 break; 2560 default: 2561 ZFCP_LOG_NORMAL 2562 ("bug: Wrong status qualifier 0x%x arrived.\n", 2563 header->fsf_status_qual.word[0]); 2564 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2565 "fsf_sq_inval:"); 2566 debug_exception( 2567 fsf_req->adapter->erp_dbf, 0, 2568 &header->fsf_status_qual.word[0], 2569 sizeof (u32)); 2570 break; 2571 } 2572 break; 2573 2574 case FSF_GOOD: 2575 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 2576 /* save port handle assigned by FSF */ 2577 port->handle = header->port_handle; 2578 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " 2579 "was opened, it's port handle is 0x%x\n", 2580 port->wwpn, zfcp_get_busid_by_port(port), 2581 port->handle); 2582 /* mark port as open */ 2583 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | 2584 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2585 retval = 0; 2586 /* check whether D_ID has changed during open */ 2587 /* 2588 * FIXME: This check is not airtight, as the FCP channel does 2589 * not monitor closures of target port connections caused on 2590 * the remote side. Thus, they might miss out on invalidating 2591 * locally cached WWPNs (and other N_Port parameters) of gone 2592 * target ports. So, our heroic attempt to make things safe 2593 * could be undermined by 'open port' response data tagged with 2594 * obsolete WWPNs. Another reason to monitor potential 2595 * connection closures ourself at least (by interpreting 2596 * incoming ELS' and unsolicited status). It just crosses my 2597 * mind that one should be able to cross-check by means of 2598 * another GID_PN straight after a port has been opened. 2599 * Alternately, an ADISC/PDISC ELS should suffice, as well. 2600 */ 2601 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; 2602 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) 2603 { 2604 if (fsf_req->qtcb->bottom.support.els1_length < 2605 ((((unsigned long) &plogi->serv_param.wwpn) - 2606 ((unsigned long) plogi)) + sizeof (u64))) { 2607 ZFCP_LOG_INFO( 2608 "warning: insufficient length of " 2609 "PLOGI payload (%i)\n", 2610 fsf_req->qtcb->bottom.support.els1_length); 2611 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2612 "fsf_s_short_plogi:"); 2613 /* skip sanity check and assume wwpn is ok */ 2614 } else { 2615 if (plogi->serv_param.wwpn != port->wwpn) { 2616 ZFCP_LOG_INFO("warning: d_id of port " 2617 "0x%016Lx changed during " 2618 "open\n", port->wwpn); 2619 debug_text_event( 2620 fsf_req->adapter->erp_dbf, 0, 2621 "fsf_s_did_change:"); 2622 atomic_clear_mask( 2623 ZFCP_STATUS_PORT_DID_DID, 2624 &port->status); 2625 } else 2626 port->wwnn = plogi->serv_param.wwnn; 2627 } 2628 } 2629 break; 2630 2631 case FSF_UNKNOWN_OP_SUBTYPE: 2632 /* should never occure, subtype not set in zfcp_fsf_open_port */ 2633 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n"); 2634 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " 2635 "op_subtype=0x%x)\n", 2636 zfcp_get_busid_by_port(port), 2637 fsf_req->qtcb->bottom.support.operation_subtype); 2638 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2639 break; 2640 2641 default: 2642 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2643 "(debug info 0x%x)\n", 2644 header->fsf_status); 2645 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2646 debug_exception(fsf_req->adapter->erp_dbf, 0, 2647 &header->fsf_status, sizeof (u32)); 2648 break; 2649 } 2650 2651 skip_fsfstatus: 2652 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); 2653 return retval; 2654 } 2655 2656 /* 2657 * function: zfcp_fsf_close_port 2658 * 2659 * purpose: submit FSF command "close port" 2660 * 2661 * returns: address of initiated FSF request 2662 * NULL - request could not be initiated 2663 */ 2664 int 2665 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 2666 { 2667 volatile struct qdio_buffer_element *sbale; 2668 unsigned long lock_flags; 2669 int retval = 0; 2670 2671 /* setup new FSF request */ 2672 retval = zfcp_fsf_req_create(erp_action->adapter, 2673 FSF_QTCB_CLOSE_PORT, 2674 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2675 erp_action->adapter->pool.fsf_req_erp, 2676 &lock_flags, &(erp_action->fsf_req)); 2677 if (retval < 0) { 2678 ZFCP_LOG_INFO("error: Could not create a close port request " 2679 "for port 0x%016Lx on adapter %s.\n", 2680 erp_action->port->wwpn, 2681 zfcp_get_busid_by_adapter(erp_action->adapter)); 2682 goto out; 2683 } 2684 2685 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2686 erp_action->fsf_req->sbal_curr, 0); 2687 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2688 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2689 2690 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); 2691 erp_action->fsf_req->data.close_port.port = erp_action->port; 2692 erp_action->fsf_req->erp_action = erp_action; 2693 erp_action->fsf_req->qtcb->header.port_handle = 2694 erp_action->port->handle; 2695 2696 /* start QDIO request for this FSF request */ 2697 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2698 if (retval) { 2699 ZFCP_LOG_INFO("error: Could not send a close port request for " 2700 "port 0x%016Lx on adapter %s.\n", 2701 erp_action->port->wwpn, 2702 zfcp_get_busid_by_adapter(erp_action->adapter)); 2703 zfcp_fsf_req_free(erp_action->fsf_req); 2704 erp_action->fsf_req = NULL; 2705 goto out; 2706 } 2707 2708 ZFCP_LOG_TRACE("close port request initiated " 2709 "(adapter %s, port 0x%016Lx)\n", 2710 zfcp_get_busid_by_adapter(erp_action->adapter), 2711 erp_action->port->wwpn); 2712 out: 2713 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2714 lock_flags); 2715 return retval; 2716 } 2717 2718 /* 2719 * function: zfcp_fsf_close_port_handler 2720 * 2721 * purpose: is called for finished Close Port FSF command 2722 * 2723 * returns: 2724 */ 2725 static int 2726 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) 2727 { 2728 int retval = -EINVAL; 2729 struct zfcp_port *port; 2730 2731 port = fsf_req->data.close_port.port; 2732 2733 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2734 /* don't change port status in our bookkeeping */ 2735 goto skip_fsfstatus; 2736 } 2737 2738 /* evaluate FSF status in QTCB */ 2739 switch (fsf_req->qtcb->header.fsf_status) { 2740 2741 case FSF_PORT_HANDLE_NOT_VALID: 2742 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 2743 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 2744 "0x%016Lx on adapter %s invalid. This may happen " 2745 "occasionally.\n", port->handle, 2746 port->wwpn, zfcp_get_busid_by_port(port)); 2747 ZFCP_LOG_DEBUG("status qualifier:\n"); 2748 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2749 (char *) &fsf_req->qtcb->header.fsf_status_qual, 2750 sizeof (union fsf_status_qual)); 2751 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2752 "fsf_s_phand_nv"); 2753 zfcp_erp_adapter_reopen(port->adapter, 0); 2754 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2755 break; 2756 2757 case FSF_ADAPTER_STATUS_AVAILABLE: 2758 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 2759 /* Note: FSF has actually closed the port in this case. 2760 * The status code is just daft. Fingers crossed for a change 2761 */ 2762 retval = 0; 2763 break; 2764 2765 case FSF_GOOD: 2766 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 2767 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " 2768 "port handle 0x%x\n", port->wwpn, 2769 zfcp_get_busid_by_port(port), port->handle); 2770 zfcp_erp_modify_port_status(port, 2771 ZFCP_STATUS_COMMON_OPEN, 2772 ZFCP_CLEAR); 2773 retval = 0; 2774 break; 2775 2776 default: 2777 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2778 "(debug info 0x%x)\n", 2779 fsf_req->qtcb->header.fsf_status); 2780 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2781 debug_exception(fsf_req->adapter->erp_dbf, 0, 2782 &fsf_req->qtcb->header.fsf_status, 2783 sizeof (u32)); 2784 break; 2785 } 2786 2787 skip_fsfstatus: 2788 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); 2789 return retval; 2790 } 2791 2792 /* 2793 * function: zfcp_fsf_close_physical_port 2794 * 2795 * purpose: submit FSF command "close physical port" 2796 * 2797 * returns: address of initiated FSF request 2798 * NULL - request could not be initiated 2799 */ 2800 int 2801 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 2802 { 2803 int retval = 0; 2804 unsigned long lock_flags; 2805 volatile struct qdio_buffer_element *sbale; 2806 2807 /* setup new FSF request */ 2808 retval = zfcp_fsf_req_create(erp_action->adapter, 2809 FSF_QTCB_CLOSE_PHYSICAL_PORT, 2810 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2811 erp_action->adapter->pool.fsf_req_erp, 2812 &lock_flags, &erp_action->fsf_req); 2813 if (retval < 0) { 2814 ZFCP_LOG_INFO("error: Could not create close physical port " 2815 "request (adapter %s, port 0x%016Lx)\n", 2816 zfcp_get_busid_by_adapter(erp_action->adapter), 2817 erp_action->port->wwpn); 2818 2819 goto out; 2820 } 2821 2822 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2823 erp_action->fsf_req->sbal_curr, 0); 2824 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2825 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2826 2827 /* mark port as being closed */ 2828 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, 2829 &erp_action->port->status); 2830 /* save a pointer to this port */ 2831 erp_action->fsf_req->data.close_physical_port.port = erp_action->port; 2832 /* port to be closeed */ 2833 erp_action->fsf_req->qtcb->header.port_handle = 2834 erp_action->port->handle; 2835 erp_action->fsf_req->erp_action = erp_action; 2836 2837 /* start QDIO request for this FSF request */ 2838 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2839 if (retval) { 2840 ZFCP_LOG_INFO("error: Could not send close physical port " 2841 "request (adapter %s, port 0x%016Lx)\n", 2842 zfcp_get_busid_by_adapter(erp_action->adapter), 2843 erp_action->port->wwpn); 2844 zfcp_fsf_req_free(erp_action->fsf_req); 2845 erp_action->fsf_req = NULL; 2846 goto out; 2847 } 2848 2849 ZFCP_LOG_TRACE("close physical port request initiated " 2850 "(adapter %s, port 0x%016Lx)\n", 2851 zfcp_get_busid_by_adapter(erp_action->adapter), 2852 erp_action->port->wwpn); 2853 out: 2854 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2855 lock_flags); 2856 return retval; 2857 } 2858 2859 /* 2860 * function: zfcp_fsf_close_physical_port_handler 2861 * 2862 * purpose: is called for finished Close Physical Port FSF command 2863 * 2864 * returns: 2865 */ 2866 static int 2867 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) 2868 { 2869 int retval = -EINVAL; 2870 struct zfcp_port *port; 2871 struct zfcp_unit *unit; 2872 struct fsf_qtcb_header *header; 2873 u16 subtable, rule, counter; 2874 2875 port = fsf_req->data.close_physical_port.port; 2876 header = &fsf_req->qtcb->header; 2877 2878 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2879 /* don't change port status in our bookkeeping */ 2880 goto skip_fsfstatus; 2881 } 2882 2883 /* evaluate FSF status in QTCB */ 2884 switch (header->fsf_status) { 2885 2886 case FSF_PORT_HANDLE_NOT_VALID: 2887 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 2888 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" 2889 "(adapter %s, port 0x%016Lx). " 2890 "This may happen occasionally.\n", 2891 port->handle, 2892 zfcp_get_busid_by_port(port), 2893 port->wwpn); 2894 ZFCP_LOG_DEBUG("status qualifier:\n"); 2895 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2896 (char *) &header->fsf_status_qual, 2897 sizeof (union fsf_status_qual)); 2898 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2899 "fsf_s_phand_nv"); 2900 zfcp_erp_adapter_reopen(port->adapter, 0); 2901 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2902 break; 2903 2904 case FSF_ACCESS_DENIED: 2905 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 2906 ZFCP_LOG_NORMAL("Access denied, cannot close " 2907 "physical port 0x%016Lx on adapter %s\n", 2908 port->wwpn, zfcp_get_busid_by_port(port)); 2909 for (counter = 0; counter < 2; counter++) { 2910 subtable = header->fsf_status_qual.halfword[counter * 2]; 2911 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2912 switch (subtable) { 2913 case FSF_SQ_CFDC_SUBTABLE_OS: 2914 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2915 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2916 case FSF_SQ_CFDC_SUBTABLE_LUN: 2917 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2918 zfcp_act_subtable_type[subtable], rule); 2919 break; 2920 } 2921 } 2922 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2923 zfcp_erp_port_access_denied(port); 2924 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2925 break; 2926 2927 case FSF_PORT_BOXED: 2928 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 2929 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " 2930 "%s needs to be reopened but it was attempted " 2931 "to close it physically.\n", 2932 port->wwpn, 2933 zfcp_get_busid_by_port(port)); 2934 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); 2935 zfcp_erp_port_reopen(port, 0); 2936 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2937 ZFCP_STATUS_FSFREQ_RETRY; 2938 break; 2939 2940 case FSF_ADAPTER_STATUS_AVAILABLE: 2941 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 2942 switch (header->fsf_status_qual.word[0]) { 2943 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2944 ZFCP_LOG_FLAGS(2, 2945 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 2946 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2947 "fsf_sq_ltest"); 2948 /* This will now be escalated by ERP */ 2949 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2950 break; 2951 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2952 ZFCP_LOG_FLAGS(2, 2953 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 2954 /* ERP strategy will escalate */ 2955 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2956 "fsf_sq_ulp"); 2957 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2958 break; 2959 default: 2960 ZFCP_LOG_NORMAL 2961 ("bug: Wrong status qualifier 0x%x arrived.\n", 2962 header->fsf_status_qual.word[0]); 2963 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2964 "fsf_sq_inval:"); 2965 debug_exception( 2966 fsf_req->adapter->erp_dbf, 0, 2967 &header->fsf_status_qual.word[0], sizeof (u32)); 2968 break; 2969 } 2970 break; 2971 2972 case FSF_GOOD: 2973 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 2974 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " 2975 "physically closed, port handle 0x%x\n", 2976 port->wwpn, 2977 zfcp_get_busid_by_port(port), port->handle); 2978 /* can't use generic zfcp_erp_modify_port_status because 2979 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 2980 */ 2981 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2982 list_for_each_entry(unit, &port->unit_list_head, list) 2983 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 2984 retval = 0; 2985 break; 2986 2987 default: 2988 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2989 "(debug info 0x%x)\n", 2990 header->fsf_status); 2991 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2992 debug_exception(fsf_req->adapter->erp_dbf, 0, 2993 &header->fsf_status, sizeof (u32)); 2994 break; 2995 } 2996 2997 skip_fsfstatus: 2998 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); 2999 return retval; 3000 } 3001 3002 /* 3003 * function: zfcp_fsf_open_unit 3004 * 3005 * purpose: 3006 * 3007 * returns: 3008 * 3009 * assumptions: This routine does not check whether the associated 3010 * remote port has already been opened. This should be 3011 * done by calling routines. Otherwise some status 3012 * may be presented by FSF 3013 */ 3014 int 3015 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 3016 { 3017 volatile struct qdio_buffer_element *sbale; 3018 unsigned long lock_flags; 3019 int retval = 0; 3020 3021 /* setup new FSF request */ 3022 retval = zfcp_fsf_req_create(erp_action->adapter, 3023 FSF_QTCB_OPEN_LUN, 3024 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3025 erp_action->adapter->pool.fsf_req_erp, 3026 &lock_flags, &(erp_action->fsf_req)); 3027 if (retval < 0) { 3028 ZFCP_LOG_INFO("error: Could not create open unit request for " 3029 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3030 erp_action->unit->fcp_lun, 3031 erp_action->unit->port->wwpn, 3032 zfcp_get_busid_by_adapter(erp_action->adapter)); 3033 goto out; 3034 } 3035 3036 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 3037 erp_action->fsf_req->sbal_curr, 0); 3038 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3039 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3040 3041 erp_action->fsf_req->qtcb->header.port_handle = 3042 erp_action->port->handle; 3043 erp_action->fsf_req->qtcb->bottom.support.fcp_lun = 3044 erp_action->unit->fcp_lun; 3045 erp_action->fsf_req->qtcb->bottom.support.option = 3046 FSF_OPEN_LUN_SUPPRESS_BOXING; 3047 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); 3048 erp_action->fsf_req->data.open_unit.unit = erp_action->unit; 3049 erp_action->fsf_req->erp_action = erp_action; 3050 3051 /* start QDIO request for this FSF request */ 3052 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 3053 if (retval) { 3054 ZFCP_LOG_INFO("error: Could not send an open unit request " 3055 "on the adapter %s, port 0x%016Lx for " 3056 "unit 0x%016Lx\n", 3057 zfcp_get_busid_by_adapter(erp_action->adapter), 3058 erp_action->port->wwpn, 3059 erp_action->unit->fcp_lun); 3060 zfcp_fsf_req_free(erp_action->fsf_req); 3061 erp_action->fsf_req = NULL; 3062 goto out; 3063 } 3064 3065 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " 3066 "port 0x%016Lx, unit 0x%016Lx)\n", 3067 zfcp_get_busid_by_adapter(erp_action->adapter), 3068 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3069 out: 3070 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3071 lock_flags); 3072 return retval; 3073 } 3074 3075 /* 3076 * function: zfcp_fsf_open_unit_handler 3077 * 3078 * purpose: is called for finished Open LUN command 3079 * 3080 * returns: 3081 */ 3082 static int 3083 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) 3084 { 3085 int retval = -EINVAL; 3086 struct zfcp_adapter *adapter; 3087 struct zfcp_unit *unit; 3088 struct fsf_qtcb_header *header; 3089 struct fsf_qtcb_bottom_support *bottom; 3090 struct fsf_queue_designator *queue_designator; 3091 u16 subtable, rule, counter; 3092 u32 allowed, exclusive, readwrite; 3093 3094 unit = fsf_req->data.open_unit.unit; 3095 3096 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3097 /* don't change unit status in our bookkeeping */ 3098 goto skip_fsfstatus; 3099 } 3100 3101 adapter = fsf_req->adapter; 3102 header = &fsf_req->qtcb->header; 3103 bottom = &fsf_req->qtcb->bottom.support; 3104 queue_designator = &header->fsf_status_qual.fsf_queue_designator; 3105 3106 allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED; 3107 exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE; 3108 readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER; 3109 3110 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 3111 ZFCP_STATUS_UNIT_SHARED | 3112 ZFCP_STATUS_UNIT_READONLY, 3113 &unit->status); 3114 3115 /* evaluate FSF status in QTCB */ 3116 switch (header->fsf_status) { 3117 3118 case FSF_PORT_HANDLE_NOT_VALID: 3119 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 3120 ZFCP_LOG_INFO("Temporary port identifier 0x%x " 3121 "for port 0x%016Lx on adapter %s invalid " 3122 "This may happen occasionally\n", 3123 unit->port->handle, 3124 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3125 ZFCP_LOG_DEBUG("status qualifier:\n"); 3126 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3127 (char *) &header->fsf_status_qual, 3128 sizeof (union fsf_status_qual)); 3129 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); 3130 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3131 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3132 break; 3133 3134 case FSF_LUN_ALREADY_OPEN: 3135 ZFCP_LOG_FLAGS(0, "FSF_LUN_ALREADY_OPEN\n"); 3136 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " 3137 "remote port 0x%016Lx on adapter %s twice.\n", 3138 unit->fcp_lun, 3139 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3140 debug_text_exception(adapter->erp_dbf, 0, 3141 "fsf_s_uopen"); 3142 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3143 break; 3144 3145 case FSF_ACCESS_DENIED: 3146 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 3147 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " 3148 "remote port 0x%016Lx on adapter %s\n", 3149 unit->fcp_lun, unit->port->wwpn, 3150 zfcp_get_busid_by_unit(unit)); 3151 for (counter = 0; counter < 2; counter++) { 3152 subtable = header->fsf_status_qual.halfword[counter * 2]; 3153 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3154 switch (subtable) { 3155 case FSF_SQ_CFDC_SUBTABLE_OS: 3156 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3157 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3158 case FSF_SQ_CFDC_SUBTABLE_LUN: 3159 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3160 zfcp_act_subtable_type[subtable], rule); 3161 break; 3162 } 3163 } 3164 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 3165 zfcp_erp_unit_access_denied(unit); 3166 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3167 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3168 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3169 break; 3170 3171 case FSF_PORT_BOXED: 3172 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 3173 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3174 "needs to be reopened\n", 3175 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3176 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 3177 zfcp_erp_port_reopen(unit->port, 0); 3178 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3179 ZFCP_STATUS_FSFREQ_RETRY; 3180 break; 3181 3182 case FSF_LUN_SHARING_VIOLATION: 3183 ZFCP_LOG_FLAGS(2, "FSF_LUN_SHARING_VIOLATION\n"); 3184 if (header->fsf_status_qual.word[0] != 0) { 3185 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " 3186 "with WWPN 0x%Lx " 3187 "connected to the adapter %s " 3188 "is already in use in LPAR%d, CSS%d\n", 3189 unit->fcp_lun, 3190 unit->port->wwpn, 3191 zfcp_get_busid_by_unit(unit), 3192 queue_designator->hla, 3193 queue_designator->cssid); 3194 } else { 3195 subtable = header->fsf_status_qual.halfword[4]; 3196 rule = header->fsf_status_qual.halfword[5]; 3197 switch (subtable) { 3198 case FSF_SQ_CFDC_SUBTABLE_OS: 3199 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3200 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3201 case FSF_SQ_CFDC_SUBTABLE_LUN: 3202 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " 3203 "remote port with WWPN 0x%Lx " 3204 "connected to the adapter %s " 3205 "is denied (%s rule %d)\n", 3206 unit->fcp_lun, 3207 unit->port->wwpn, 3208 zfcp_get_busid_by_unit(unit), 3209 zfcp_act_subtable_type[subtable], 3210 rule); 3211 break; 3212 } 3213 } 3214 ZFCP_LOG_DEBUG("status qualifier:\n"); 3215 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3216 (char *) &header->fsf_status_qual, 3217 sizeof (union fsf_status_qual)); 3218 debug_text_event(adapter->erp_dbf, 2, 3219 "fsf_s_l_sh_vio"); 3220 zfcp_erp_unit_access_denied(unit); 3221 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3222 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3223 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3224 break; 3225 3226 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 3227 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED\n"); 3228 ZFCP_LOG_INFO("error: The adapter ran out of resources. " 3229 "There is no handle (temporary port identifier) " 3230 "available for unit 0x%016Lx on port 0x%016Lx " 3231 "on adapter %s\n", 3232 unit->fcp_lun, 3233 unit->port->wwpn, 3234 zfcp_get_busid_by_unit(unit)); 3235 debug_text_event(adapter->erp_dbf, 1, 3236 "fsf_s_max_units"); 3237 zfcp_erp_unit_failed(unit); 3238 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3239 break; 3240 3241 case FSF_ADAPTER_STATUS_AVAILABLE: 3242 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 3243 switch (header->fsf_status_qual.word[0]) { 3244 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3245 ZFCP_LOG_FLAGS(2, 3246 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 3247 /* Re-establish link to port */ 3248 debug_text_event(adapter->erp_dbf, 1, 3249 "fsf_sq_ltest"); 3250 zfcp_erp_port_reopen(unit->port, 0); 3251 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3252 break; 3253 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3254 ZFCP_LOG_FLAGS(2, 3255 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 3256 /* ERP strategy will escalate */ 3257 debug_text_event(adapter->erp_dbf, 1, 3258 "fsf_sq_ulp"); 3259 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3260 break; 3261 default: 3262 ZFCP_LOG_NORMAL 3263 ("bug: Wrong status qualifier 0x%x arrived.\n", 3264 header->fsf_status_qual.word[0]); 3265 debug_text_event(adapter->erp_dbf, 0, 3266 "fsf_sq_inval:"); 3267 debug_exception(adapter->erp_dbf, 0, 3268 &header->fsf_status_qual.word[0], 3269 sizeof (u32)); 3270 } 3271 break; 3272 3273 case FSF_INVALID_COMMAND_OPTION: 3274 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n"); 3275 ZFCP_LOG_NORMAL( 3276 "Invalid option 0x%x has been specified " 3277 "in QTCB bottom sent to the adapter %s\n", 3278 bottom->option, 3279 zfcp_get_busid_by_adapter(adapter)); 3280 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3281 retval = -EINVAL; 3282 break; 3283 3284 case FSF_GOOD: 3285 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 3286 /* save LUN handle assigned by FSF */ 3287 unit->handle = header->lun_handle; 3288 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " 3289 "adapter %s opened, port handle 0x%x\n", 3290 unit->fcp_lun, 3291 unit->port->wwpn, 3292 zfcp_get_busid_by_unit(unit), 3293 unit->handle); 3294 /* mark unit as open */ 3295 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3296 3297 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){ 3298 if (!exclusive) 3299 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, 3300 &unit->status); 3301 3302 if (!readwrite) { 3303 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, 3304 &unit->status); 3305 ZFCP_LOG_NORMAL("read-only access for unit " 3306 "(adapter %s, wwpn=0x%016Lx, " 3307 "fcp_lun=0x%016Lx)\n", 3308 zfcp_get_busid_by_unit(unit), 3309 unit->port->wwpn, 3310 unit->fcp_lun); 3311 } 3312 3313 if (exclusive && !readwrite) { 3314 ZFCP_LOG_NORMAL("exclusive access of read-only " 3315 "unit not supported\n"); 3316 zfcp_erp_unit_failed(unit); 3317 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3318 zfcp_erp_unit_shutdown(unit, 0); 3319 } else if (!exclusive && readwrite) { 3320 ZFCP_LOG_NORMAL("shared access of read-write " 3321 "unit not supported\n"); 3322 zfcp_erp_unit_failed(unit); 3323 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3324 zfcp_erp_unit_shutdown(unit, 0); 3325 } 3326 } 3327 3328 retval = 0; 3329 break; 3330 3331 default: 3332 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3333 "(debug info 0x%x)\n", 3334 header->fsf_status); 3335 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); 3336 debug_exception(adapter->erp_dbf, 0, 3337 &header->fsf_status, sizeof (u32)); 3338 break; 3339 } 3340 3341 skip_fsfstatus: 3342 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); 3343 return retval; 3344 } 3345 3346 /* 3347 * function: zfcp_fsf_close_unit 3348 * 3349 * purpose: 3350 * 3351 * returns: address of fsf_req - request successfully initiated 3352 * NULL - 3353 * 3354 * assumptions: This routine does not check whether the associated 3355 * remote port/lun has already been opened. This should be 3356 * done by calling routines. Otherwise some status 3357 * may be presented by FSF 3358 */ 3359 int 3360 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 3361 { 3362 volatile struct qdio_buffer_element *sbale; 3363 unsigned long lock_flags; 3364 int retval = 0; 3365 3366 /* setup new FSF request */ 3367 retval = zfcp_fsf_req_create(erp_action->adapter, 3368 FSF_QTCB_CLOSE_LUN, 3369 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3370 erp_action->adapter->pool.fsf_req_erp, 3371 &lock_flags, &(erp_action->fsf_req)); 3372 if (retval < 0) { 3373 ZFCP_LOG_INFO("error: Could not create close unit request for " 3374 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3375 erp_action->unit->fcp_lun, 3376 erp_action->port->wwpn, 3377 zfcp_get_busid_by_adapter(erp_action->adapter)); 3378 goto out; 3379 } 3380 3381 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 3382 erp_action->fsf_req->sbal_curr, 0); 3383 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3384 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3385 3386 erp_action->fsf_req->qtcb->header.port_handle = 3387 erp_action->port->handle; 3388 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; 3389 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); 3390 erp_action->fsf_req->data.close_unit.unit = erp_action->unit; 3391 erp_action->fsf_req->erp_action = erp_action; 3392 3393 /* start QDIO request for this FSF request */ 3394 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 3395 if (retval) { 3396 ZFCP_LOG_INFO("error: Could not send a close unit request for " 3397 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", 3398 erp_action->unit->fcp_lun, 3399 erp_action->port->wwpn, 3400 zfcp_get_busid_by_adapter(erp_action->adapter)); 3401 zfcp_fsf_req_free(erp_action->fsf_req); 3402 erp_action->fsf_req = NULL; 3403 goto out; 3404 } 3405 3406 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " 3407 "port 0x%016Lx, unit 0x%016Lx)\n", 3408 zfcp_get_busid_by_adapter(erp_action->adapter), 3409 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3410 out: 3411 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3412 lock_flags); 3413 return retval; 3414 } 3415 3416 /* 3417 * function: zfcp_fsf_close_unit_handler 3418 * 3419 * purpose: is called for finished Close LUN FSF command 3420 * 3421 * returns: 3422 */ 3423 static int 3424 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) 3425 { 3426 int retval = -EINVAL; 3427 struct zfcp_unit *unit; 3428 3429 unit = fsf_req->data.close_unit.unit; /* restore unit */ 3430 3431 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3432 /* don't change unit status in our bookkeeping */ 3433 goto skip_fsfstatus; 3434 } 3435 3436 /* evaluate FSF status in QTCB */ 3437 switch (fsf_req->qtcb->header.fsf_status) { 3438 3439 case FSF_PORT_HANDLE_NOT_VALID: 3440 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 3441 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3442 "0x%016Lx on adapter %s invalid. This may " 3443 "happen in rare circumstances\n", 3444 unit->port->handle, 3445 unit->port->wwpn, 3446 zfcp_get_busid_by_unit(unit)); 3447 ZFCP_LOG_DEBUG("status qualifier:\n"); 3448 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3449 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3450 sizeof (union fsf_status_qual)); 3451 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3452 "fsf_s_phand_nv"); 3453 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3454 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req, 3455 &fsf_req->qtcb->header.fsf_status_qual, 3456 sizeof (union fsf_status_qual)); 3457 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3458 break; 3459 3460 case FSF_LUN_HANDLE_NOT_VALID: 3461 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n"); 3462 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " 3463 "0x%016Lx on port 0x%016Lx on adapter %s is " 3464 "invalid. This may happen occasionally.\n", 3465 unit->handle, 3466 unit->fcp_lun, 3467 unit->port->wwpn, 3468 zfcp_get_busid_by_unit(unit)); 3469 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 3470 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3471 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3472 sizeof (union fsf_status_qual)); 3473 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3474 "fsf_s_lhand_nv"); 3475 zfcp_erp_port_reopen(unit->port, 0); 3476 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req, 3477 &fsf_req->qtcb->header.fsf_status_qual, 3478 sizeof (union fsf_status_qual)); 3479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3480 break; 3481 3482 case FSF_PORT_BOXED: 3483 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 3484 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3485 "needs to be reopened\n", 3486 unit->port->wwpn, 3487 zfcp_get_busid_by_unit(unit)); 3488 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3489 zfcp_erp_port_reopen(unit->port, 0); 3490 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3491 ZFCP_STATUS_FSFREQ_RETRY; 3492 break; 3493 3494 case FSF_ADAPTER_STATUS_AVAILABLE: 3495 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 3496 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 3497 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3498 ZFCP_LOG_FLAGS(2, 3499 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 3500 /* re-establish link to port */ 3501 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3502 "fsf_sq_ltest"); 3503 zfcp_erp_port_reopen(unit->port, 0); 3504 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3505 break; 3506 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3507 ZFCP_LOG_FLAGS(2, 3508 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 3509 /* ERP strategy will escalate */ 3510 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3511 "fsf_sq_ulp"); 3512 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3513 break; 3514 default: 3515 ZFCP_LOG_NORMAL 3516 ("bug: Wrong status qualifier 0x%x arrived.\n", 3517 fsf_req->qtcb->header.fsf_status_qual.word[0]); 3518 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3519 "fsf_sq_inval:"); 3520 debug_exception( 3521 fsf_req->adapter->erp_dbf, 0, 3522 &fsf_req->qtcb->header.fsf_status_qual.word[0], 3523 sizeof (u32)); 3524 break; 3525 } 3526 break; 3527 3528 case FSF_GOOD: 3529 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 3530 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " 3531 "closed, port handle 0x%x\n", 3532 unit->fcp_lun, 3533 unit->port->wwpn, 3534 zfcp_get_busid_by_unit(unit), 3535 unit->handle); 3536 /* mark unit as closed */ 3537 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3538 retval = 0; 3539 break; 3540 3541 default: 3542 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3543 "(debug info 0x%x)\n", 3544 fsf_req->qtcb->header.fsf_status); 3545 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3546 debug_exception(fsf_req->adapter->erp_dbf, 0, 3547 &fsf_req->qtcb->header.fsf_status, 3548 sizeof (u32)); 3549 break; 3550 } 3551 3552 skip_fsfstatus: 3553 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); 3554 return retval; 3555 } 3556 3557 /** 3558 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) 3559 * @adapter: adapter where scsi command is issued 3560 * @unit: unit where command is sent to 3561 * @scsi_cmnd: scsi command to be sent 3562 * @timer: timer to be started when request is initiated 3563 * @req_flags: flags for fsf_request 3564 */ 3565 int 3566 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, 3567 struct zfcp_unit *unit, 3568 struct scsi_cmnd * scsi_cmnd, 3569 struct timer_list *timer, int req_flags) 3570 { 3571 struct zfcp_fsf_req *fsf_req = NULL; 3572 struct fcp_cmnd_iu *fcp_cmnd_iu; 3573 unsigned int sbtype; 3574 unsigned long lock_flags; 3575 int real_bytes = 0; 3576 int retval = 0; 3577 int mask; 3578 3579 /* setup new FSF request */ 3580 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3581 adapter->pool.fsf_req_scsi, 3582 &lock_flags, &fsf_req); 3583 if (unlikely(retval < 0)) { 3584 ZFCP_LOG_DEBUG("error: Could not create FCP command request " 3585 "for unit 0x%016Lx on port 0x%016Lx on " 3586 "adapter %s\n", 3587 unit->fcp_lun, 3588 unit->port->wwpn, 3589 zfcp_get_busid_by_adapter(adapter)); 3590 goto failed_req_create; 3591 } 3592 3593 /* 3594 * associate FSF request with SCSI request 3595 * (need this for look up on abort) 3596 */ 3597 fsf_req->data.send_fcp_command_task.fsf_req = fsf_req; 3598 scsi_cmnd->host_scribble = (char *) &(fsf_req->data); 3599 3600 /* 3601 * associate SCSI command with FSF request 3602 * (need this for look up on normal command completion) 3603 */ 3604 fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd; 3605 fsf_req->data.send_fcp_command_task.start_jiffies = jiffies; 3606 fsf_req->data.send_fcp_command_task.unit = unit; 3607 ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun); 3608 3609 /* set handles of unit and its parent port in QTCB */ 3610 fsf_req->qtcb->header.lun_handle = unit->handle; 3611 fsf_req->qtcb->header.port_handle = unit->port->handle; 3612 3613 /* FSF does not define the structure of the FCP_CMND IU */ 3614 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3615 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3616 3617 /* 3618 * set depending on data direction: 3619 * data direction bits in SBALE (SB Type) 3620 * data direction bits in QTCB 3621 * data direction bits in FCP_CMND IU 3622 */ 3623 switch (scsi_cmnd->sc_data_direction) { 3624 case DMA_NONE: 3625 ZFCP_LOG_FLAGS(3, "DMA_NONE\n"); 3626 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3627 /* 3628 * FIXME(qdio): 3629 * what is the correct type for commands 3630 * without 'real' data buffers? 3631 */ 3632 sbtype = SBAL_FLAGS0_TYPE_READ; 3633 break; 3634 case DMA_FROM_DEVICE: 3635 ZFCP_LOG_FLAGS(3, "DMA_FROM_DEVICE\n"); 3636 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; 3637 sbtype = SBAL_FLAGS0_TYPE_READ; 3638 fcp_cmnd_iu->rddata = 1; 3639 break; 3640 case DMA_TO_DEVICE: 3641 ZFCP_LOG_FLAGS(3, "DMA_TO_DEVICE\n"); 3642 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; 3643 sbtype = SBAL_FLAGS0_TYPE_WRITE; 3644 fcp_cmnd_iu->wddata = 1; 3645 break; 3646 case DMA_BIDIRECTIONAL: 3647 ZFCP_LOG_FLAGS(0, "DMA_BIDIRECTIONAL not supported\n"); 3648 default: 3649 /* 3650 * dummy, catch this condition earlier 3651 * in zfcp_scsi_queuecommand 3652 */ 3653 goto failed_scsi_cmnd; 3654 } 3655 3656 /* set FC service class in QTCB (3 per default) */ 3657 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class; 3658 3659 /* set FCP_LUN in FCP_CMND IU in QTCB */ 3660 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3661 3662 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; 3663 3664 /* set task attributes in FCP_CMND IU in QTCB */ 3665 if (likely((scsi_cmnd->device->simple_tags) || 3666 (atomic_test_mask(mask, &unit->status)))) 3667 fcp_cmnd_iu->task_attribute = SIMPLE_Q; 3668 else 3669 fcp_cmnd_iu->task_attribute = UNTAGGED; 3670 3671 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ 3672 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { 3673 fcp_cmnd_iu->add_fcp_cdb_length 3674 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; 3675 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " 3676 "additional FCP_CDB length is 0x%x " 3677 "(shifted right 2 bits)\n", 3678 scsi_cmnd->cmd_len, 3679 fcp_cmnd_iu->add_fcp_cdb_length); 3680 } 3681 /* 3682 * copy SCSI CDB (including additional length, if any) to 3683 * FCP_CDB in FCP_CMND IU in QTCB 3684 */ 3685 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3686 3687 /* FCP CMND IU length in QTCB */ 3688 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3689 sizeof (struct fcp_cmnd_iu) + 3690 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); 3691 3692 /* generate SBALEs from data buffer */ 3693 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); 3694 if (unlikely(real_bytes < 0)) { 3695 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { 3696 ZFCP_LOG_DEBUG( 3697 "Data did not fit into available buffer(s), " 3698 "waiting for more...\n"); 3699 retval = -EIO; 3700 } else { 3701 ZFCP_LOG_NORMAL("error: No truncation implemented but " 3702 "required. Shutting down unit " 3703 "(adapter %s, port 0x%016Lx, " 3704 "unit 0x%016Lx)\n", 3705 zfcp_get_busid_by_unit(unit), 3706 unit->port->wwpn, 3707 unit->fcp_lun); 3708 zfcp_erp_unit_shutdown(unit, 0); 3709 retval = -EINVAL; 3710 } 3711 goto no_fit; 3712 } 3713 3714 /* set length of FCP data length in FCP_CMND IU in QTCB */ 3715 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); 3716 3717 ZFCP_LOG_DEBUG("Sending SCSI command:\n"); 3718 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3719 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3720 3721 /* 3722 * start QDIO request for this FSF request 3723 * covered by an SBALE) 3724 */ 3725 retval = zfcp_fsf_req_send(fsf_req, timer); 3726 if (unlikely(retval < 0)) { 3727 ZFCP_LOG_INFO("error: Could not send FCP command request " 3728 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 3729 zfcp_get_busid_by_adapter(adapter), 3730 unit->port->wwpn, 3731 unit->fcp_lun); 3732 goto send_failed; 3733 } 3734 3735 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " 3736 "port 0x%016Lx, unit 0x%016Lx)\n", 3737 zfcp_get_busid_by_adapter(adapter), 3738 unit->port->wwpn, 3739 unit->fcp_lun); 3740 goto success; 3741 3742 send_failed: 3743 no_fit: 3744 failed_scsi_cmnd: 3745 zfcp_fsf_req_free(fsf_req); 3746 fsf_req = NULL; 3747 scsi_cmnd->host_scribble = NULL; 3748 success: 3749 failed_req_create: 3750 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3751 return retval; 3752 } 3753 3754 /* 3755 * function: zfcp_fsf_send_fcp_command_task_management 3756 * 3757 * purpose: 3758 * 3759 * returns: 3760 * 3761 * FIXME(design): should be watched by a timeout!!! 3762 * FIXME(design) shouldn't this be modified to return an int 3763 * also...don't know how though 3764 * 3765 */ 3766 struct zfcp_fsf_req * 3767 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, 3768 struct zfcp_unit *unit, 3769 u8 tm_flags, int req_flags) 3770 { 3771 struct zfcp_fsf_req *fsf_req = NULL; 3772 int retval = 0; 3773 struct fcp_cmnd_iu *fcp_cmnd_iu; 3774 unsigned long lock_flags; 3775 volatile struct qdio_buffer_element *sbale; 3776 3777 /* setup new FSF request */ 3778 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3779 adapter->pool.fsf_req_scsi, 3780 &lock_flags, &fsf_req); 3781 if (retval < 0) { 3782 ZFCP_LOG_INFO("error: Could not create FCP command (task " 3783 "management) request for adapter %s, port " 3784 " 0x%016Lx, unit 0x%016Lx.\n", 3785 zfcp_get_busid_by_adapter(adapter), 3786 unit->port->wwpn, unit->fcp_lun); 3787 goto out; 3788 } 3789 3790 /* 3791 * Used to decide on proper handler in the return path, 3792 * could be either zfcp_fsf_send_fcp_command_task_handler or 3793 * zfcp_fsf_send_fcp_command_task_management_handler */ 3794 3795 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; 3796 3797 /* 3798 * hold a pointer to the unit being target of this 3799 * task management request 3800 */ 3801 fsf_req->data.send_fcp_command_task_management.unit = unit; 3802 3803 /* set FSF related fields in QTCB */ 3804 fsf_req->qtcb->header.lun_handle = unit->handle; 3805 fsf_req->qtcb->header.port_handle = unit->port->handle; 3806 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3807 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class; 3808 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3809 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); 3810 3811 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3812 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; 3813 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3814 3815 /* set FCP related fields in FCP_CMND IU in QTCB */ 3816 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3817 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3818 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3819 fcp_cmnd_iu->task_management_flags = tm_flags; 3820 3821 /* start QDIO request for this FSF request */ 3822 zfcp_fsf_start_scsi_er_timer(adapter); 3823 retval = zfcp_fsf_req_send(fsf_req, NULL); 3824 if (retval) { 3825 del_timer(&adapter->scsi_er_timer); 3826 ZFCP_LOG_INFO("error: Could not send an FCP-command (task " 3827 "management) on adapter %s, port 0x%016Lx for " 3828 "unit LUN 0x%016Lx\n", 3829 zfcp_get_busid_by_adapter(adapter), 3830 unit->port->wwpn, 3831 unit->fcp_lun); 3832 zfcp_fsf_req_free(fsf_req); 3833 fsf_req = NULL; 3834 goto out; 3835 } 3836 3837 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " 3838 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " 3839 "tm_flags=0x%x)\n", 3840 zfcp_get_busid_by_adapter(adapter), 3841 unit->port->wwpn, 3842 unit->fcp_lun, 3843 tm_flags); 3844 out: 3845 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3846 return fsf_req; 3847 } 3848 3849 /* 3850 * function: zfcp_fsf_send_fcp_command_handler 3851 * 3852 * purpose: is called for finished Send FCP Command 3853 * 3854 * returns: 3855 */ 3856 static int 3857 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 3858 { 3859 int retval = -EINVAL; 3860 struct zfcp_unit *unit; 3861 struct fsf_qtcb_header *header; 3862 u16 subtable, rule, counter; 3863 3864 header = &fsf_req->qtcb->header; 3865 3866 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) 3867 unit = fsf_req->data.send_fcp_command_task_management.unit; 3868 else 3869 unit = fsf_req->data.send_fcp_command_task.unit; 3870 3871 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 3872 /* go directly to calls of special handlers */ 3873 goto skip_fsfstatus; 3874 } 3875 3876 /* evaluate FSF status in QTCB */ 3877 switch (header->fsf_status) { 3878 3879 case FSF_PORT_HANDLE_NOT_VALID: 3880 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 3881 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3882 "0x%016Lx on adapter %s invalid\n", 3883 unit->port->handle, 3884 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3885 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3886 (char *) &header->fsf_status_qual, 3887 sizeof (union fsf_status_qual)); 3888 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3889 "fsf_s_phand_nv"); 3890 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3891 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3892 break; 3893 3894 case FSF_LUN_HANDLE_NOT_VALID: 3895 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n"); 3896 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " 3897 "0x%016Lx on port 0x%016Lx on adapter %s is " 3898 "invalid. This may happen occasionally.\n", 3899 unit->handle, 3900 unit->fcp_lun, 3901 unit->port->wwpn, 3902 zfcp_get_busid_by_unit(unit)); 3903 ZFCP_LOG_NORMAL("Status qualifier data:\n"); 3904 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3905 (char *) &header->fsf_status_qual, 3906 sizeof (union fsf_status_qual)); 3907 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3908 "fsf_s_uhand_nv"); 3909 zfcp_erp_port_reopen(unit->port, 0); 3910 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3911 break; 3912 3913 case FSF_HANDLE_MISMATCH: 3914 ZFCP_LOG_FLAGS(0, "FSF_HANDLE_MISMATCH\n"); 3915 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " 3916 "unexpectedly. (adapter %s, port 0x%016Lx, " 3917 "unit 0x%016Lx)\n", 3918 unit->port->handle, 3919 zfcp_get_busid_by_unit(unit), 3920 unit->port->wwpn, 3921 unit->fcp_lun); 3922 ZFCP_LOG_NORMAL("status qualifier:\n"); 3923 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3924 (char *) &header->fsf_status_qual, 3925 sizeof (union fsf_status_qual)); 3926 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3927 "fsf_s_hand_mis"); 3928 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3929 zfcp_cmd_dbf_event_fsf("handmism", 3930 fsf_req, 3931 &header->fsf_status_qual, 3932 sizeof (union fsf_status_qual)); 3933 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3934 break; 3935 3936 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 3937 ZFCP_LOG_FLAGS(0, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n"); 3938 if (fsf_req->adapter->fc_service_class <= 3) { 3939 ZFCP_LOG_NORMAL("error: The adapter %s does " 3940 "not support fibrechannel class %d.\n", 3941 zfcp_get_busid_by_unit(unit), 3942 fsf_req->adapter->fc_service_class); 3943 } else { 3944 ZFCP_LOG_NORMAL("bug: The fibrechannel class at " 3945 "adapter %s is invalid. " 3946 "(debug info %d)\n", 3947 zfcp_get_busid_by_unit(unit), 3948 fsf_req->adapter->fc_service_class); 3949 } 3950 /* stop operation for this adapter */ 3951 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 3952 "fsf_s_class_nsup"); 3953 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3954 zfcp_cmd_dbf_event_fsf("unsclass", 3955 fsf_req, 3956 &header->fsf_status_qual, 3957 sizeof (union fsf_status_qual)); 3958 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3959 break; 3960 3961 case FSF_FCPLUN_NOT_VALID: 3962 ZFCP_LOG_FLAGS(0, "FSF_FCPLUN_NOT_VALID\n"); 3963 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " 3964 "adapter %s does not have correct unit " 3965 "handle 0x%x\n", 3966 unit->fcp_lun, 3967 unit->port->wwpn, 3968 zfcp_get_busid_by_unit(unit), 3969 unit->handle); 3970 ZFCP_LOG_DEBUG("status qualifier:\n"); 3971 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3972 (char *) &header->fsf_status_qual, 3973 sizeof (union fsf_status_qual)); 3974 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3975 "fsf_s_fcp_lun_nv"); 3976 zfcp_erp_port_reopen(unit->port, 0); 3977 zfcp_cmd_dbf_event_fsf("fluninv", 3978 fsf_req, 3979 &header->fsf_status_qual, 3980 sizeof (union fsf_status_qual)); 3981 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3982 break; 3983 3984 case FSF_ACCESS_DENIED: 3985 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 3986 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " 3987 "unit 0x%016Lx on port 0x%016Lx on " 3988 "adapter %s\n", unit->fcp_lun, unit->port->wwpn, 3989 zfcp_get_busid_by_unit(unit)); 3990 for (counter = 0; counter < 2; counter++) { 3991 subtable = header->fsf_status_qual.halfword[counter * 2]; 3992 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3993 switch (subtable) { 3994 case FSF_SQ_CFDC_SUBTABLE_OS: 3995 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3996 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3997 case FSF_SQ_CFDC_SUBTABLE_LUN: 3998 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3999 zfcp_act_subtable_type[subtable], rule); 4000 break; 4001 } 4002 } 4003 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 4004 zfcp_erp_unit_access_denied(unit); 4005 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4006 break; 4007 4008 case FSF_DIRECTION_INDICATOR_NOT_VALID: 4009 ZFCP_LOG_FLAGS(0, "FSF_DIRECTION_INDICATOR_NOT_VALID\n"); 4010 ZFCP_LOG_INFO("bug: Invalid data direction given for unit " 4011 "0x%016Lx on port 0x%016Lx on adapter %s " 4012 "(debug info %d)\n", 4013 unit->fcp_lun, 4014 unit->port->wwpn, 4015 zfcp_get_busid_by_unit(unit), 4016 fsf_req->qtcb->bottom.io.data_direction); 4017 /* stop operation for this adapter */ 4018 debug_text_event(fsf_req->adapter->erp_dbf, 0, 4019 "fsf_s_dir_ind_nv"); 4020 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 4021 zfcp_cmd_dbf_event_fsf("dirinv", 4022 fsf_req, 4023 &header->fsf_status_qual, 4024 sizeof (union fsf_status_qual)); 4025 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4026 break; 4027 4028 case FSF_CMND_LENGTH_NOT_VALID: 4029 ZFCP_LOG_FLAGS(0, "FSF_CMND_LENGTH_NOT_VALID\n"); 4030 ZFCP_LOG_NORMAL 4031 ("bug: An invalid control-data-block length field " 4032 "was found in a command for unit 0x%016Lx on port " 4033 "0x%016Lx on adapter %s " "(debug info %d)\n", 4034 unit->fcp_lun, unit->port->wwpn, 4035 zfcp_get_busid_by_unit(unit), 4036 fsf_req->qtcb->bottom.io.fcp_cmnd_length); 4037 /* stop operation for this adapter */ 4038 debug_text_event(fsf_req->adapter->erp_dbf, 0, 4039 "fsf_s_cmd_len_nv"); 4040 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 4041 zfcp_cmd_dbf_event_fsf("cleninv", 4042 fsf_req, 4043 &header->fsf_status_qual, 4044 sizeof (union fsf_status_qual)); 4045 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4046 break; 4047 4048 case FSF_PORT_BOXED: 4049 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 4050 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 4051 "needs to be reopened\n", 4052 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 4053 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 4054 zfcp_erp_port_reopen(unit->port, 0); 4055 zfcp_cmd_dbf_event_fsf("portbox", fsf_req, 4056 &header->fsf_status_qual, 4057 sizeof (union fsf_status_qual)); 4058 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 4059 ZFCP_STATUS_FSFREQ_RETRY; 4060 break; 4061 4062 case FSF_LUN_BOXED: 4063 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n"); 4064 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " 4065 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", 4066 zfcp_get_busid_by_unit(unit), 4067 unit->port->wwpn, unit->fcp_lun); 4068 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 4069 zfcp_erp_unit_reopen(unit, 0); 4070 zfcp_cmd_dbf_event_fsf("unitbox", fsf_req, 4071 &header->fsf_status_qual, 4072 sizeof(union fsf_status_qual)); 4073 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 4074 | ZFCP_STATUS_FSFREQ_RETRY; 4075 break; 4076 4077 case FSF_ADAPTER_STATUS_AVAILABLE: 4078 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 4079 switch (header->fsf_status_qual.word[0]) { 4080 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 4081 ZFCP_LOG_FLAGS(2, 4082 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 4083 /* re-establish link to port */ 4084 debug_text_event(fsf_req->adapter->erp_dbf, 1, 4085 "fsf_sq_ltest"); 4086 zfcp_erp_port_reopen(unit->port, 0); 4087 zfcp_cmd_dbf_event_fsf( 4088 "sqltest", 4089 fsf_req, 4090 &header->fsf_status_qual, 4091 sizeof (union fsf_status_qual)); 4092 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4093 break; 4094 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 4095 ZFCP_LOG_FLAGS(3, 4096 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 4097 /* FIXME(hw) need proper specs for proper action */ 4098 /* let scsi stack deal with retries and escalation */ 4099 debug_text_event(fsf_req->adapter->erp_dbf, 1, 4100 "fsf_sq_ulp"); 4101 zfcp_cmd_dbf_event_fsf( 4102 "sqdeperp", 4103 fsf_req, 4104 &header->fsf_status_qual, 4105 sizeof (union fsf_status_qual)); 4106 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4107 break; 4108 default: 4109 /* FIXME: shall we consider this a successful transfer? */ 4110 ZFCP_LOG_NORMAL 4111 ("bug: Wrong status qualifier 0x%x arrived.\n", 4112 header->fsf_status_qual.word[0]); 4113 debug_text_event(fsf_req->adapter->erp_dbf, 0, 4114 "fsf_sq_inval:"); 4115 debug_exception(fsf_req->adapter->erp_dbf, 0, 4116 &header->fsf_status_qual.word[0], 4117 sizeof(u32)); 4118 break; 4119 } 4120 break; 4121 4122 case FSF_GOOD: 4123 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 4124 break; 4125 4126 case FSF_FCP_RSP_AVAILABLE: 4127 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n"); 4128 break; 4129 4130 default: 4131 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 4132 debug_exception(fsf_req->adapter->erp_dbf, 0, 4133 &header->fsf_status, sizeof(u32)); 4134 break; 4135 } 4136 4137 skip_fsfstatus: 4138 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { 4139 retval = 4140 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); 4141 } else { 4142 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); 4143 } 4144 return retval; 4145 } 4146 4147 /* 4148 * function: zfcp_fsf_send_fcp_command_task_handler 4149 * 4150 * purpose: evaluates FCP_RSP IU 4151 * 4152 * returns: 4153 */ 4154 static int 4155 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) 4156 { 4157 int retval = 0; 4158 struct scsi_cmnd *scpnt; 4159 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4160 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4161 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) 4162 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 4163 u32 sns_len; 4164 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4165 unsigned long flags; 4166 struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit; 4167 4168 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); 4169 scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd; 4170 if (unlikely(!scpnt)) { 4171 ZFCP_LOG_DEBUG 4172 ("Command with fsf_req %p is not associated to " 4173 "a scsi command anymore. Aborted?\n", fsf_req); 4174 goto out; 4175 } 4176 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { 4177 /* FIXME: (design) mid-layer should handle DID_ABORT like 4178 * DID_SOFT_ERROR by retrying the request for devices 4179 * that allow retries. 4180 */ 4181 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); 4182 set_host_byte(&scpnt->result, DID_SOFT_ERROR); 4183 set_driver_byte(&scpnt->result, SUGGEST_RETRY); 4184 goto skip_fsfstatus; 4185 } 4186 4187 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 4188 ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); 4189 set_host_byte(&scpnt->result, DID_ERROR); 4190 goto skip_fsfstatus; 4191 } 4192 4193 /* set message byte of result in SCSI command */ 4194 scpnt->result |= COMMAND_COMPLETE << 8; 4195 4196 /* 4197 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte 4198 * of result in SCSI command 4199 */ 4200 scpnt->result |= fcp_rsp_iu->scsi_status; 4201 if (unlikely(fcp_rsp_iu->scsi_status)) { 4202 /* DEBUG */ 4203 ZFCP_LOG_DEBUG("status for SCSI Command:\n"); 4204 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4205 scpnt->cmnd, scpnt->cmd_len); 4206 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", 4207 fcp_rsp_iu->scsi_status); 4208 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4209 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); 4210 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4211 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), 4212 fcp_rsp_iu->fcp_sns_len); 4213 } 4214 4215 /* check FCP_RSP_INFO */ 4216 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { 4217 ZFCP_LOG_DEBUG("rsp_len is valid\n"); 4218 switch (fcp_rsp_info[3]) { 4219 case RSP_CODE_GOOD: 4220 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n"); 4221 /* ok, continue */ 4222 ZFCP_LOG_TRACE("no failure or Task Management " 4223 "Function complete\n"); 4224 set_host_byte(&scpnt->result, DID_OK); 4225 break; 4226 case RSP_CODE_LENGTH_MISMATCH: 4227 ZFCP_LOG_FLAGS(0, "RSP_CODE_LENGTH_MISMATCH\n"); 4228 /* hardware bug */ 4229 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4230 "that the fibrechannel protocol data " 4231 "length differs from the burst length. " 4232 "The problem occured on unit 0x%016Lx " 4233 "on port 0x%016Lx on adapter %s", 4234 unit->fcp_lun, 4235 unit->port->wwpn, 4236 zfcp_get_busid_by_unit(unit)); 4237 /* dump SCSI CDB as prepared by zfcp */ 4238 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4239 (char *) &fsf_req->qtcb-> 4240 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4241 zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0); 4242 set_host_byte(&scpnt->result, DID_ERROR); 4243 goto skip_fsfstatus; 4244 case RSP_CODE_FIELD_INVALID: 4245 ZFCP_LOG_FLAGS(0, "RSP_CODE_FIELD_INVALID\n"); 4246 /* driver or hardware bug */ 4247 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4248 "that the fibrechannel protocol data " 4249 "fields were incorrectly set up. " 4250 "The problem occured on the unit " 4251 "0x%016Lx on port 0x%016Lx on " 4252 "adapter %s", 4253 unit->fcp_lun, 4254 unit->port->wwpn, 4255 zfcp_get_busid_by_unit(unit)); 4256 /* dump SCSI CDB as prepared by zfcp */ 4257 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4258 (char *) &fsf_req->qtcb-> 4259 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4260 set_host_byte(&scpnt->result, DID_ERROR); 4261 zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0); 4262 goto skip_fsfstatus; 4263 case RSP_CODE_RO_MISMATCH: 4264 ZFCP_LOG_FLAGS(0, "RSP_CODE_RO_MISMATCH\n"); 4265 /* hardware bug */ 4266 ZFCP_LOG_NORMAL("bug: The FCP response code indicates " 4267 "that conflicting values for the " 4268 "fibrechannel payload offset from the " 4269 "header were found. " 4270 "The problem occured on unit 0x%016Lx " 4271 "on port 0x%016Lx on adapter %s.\n", 4272 unit->fcp_lun, 4273 unit->port->wwpn, 4274 zfcp_get_busid_by_unit(unit)); 4275 /* dump SCSI CDB as prepared by zfcp */ 4276 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4277 (char *) &fsf_req->qtcb-> 4278 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4279 zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0); 4280 set_host_byte(&scpnt->result, DID_ERROR); 4281 goto skip_fsfstatus; 4282 default: 4283 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4284 "code was detected for a command. " 4285 "The problem occured on the unit " 4286 "0x%016Lx on port 0x%016Lx on " 4287 "adapter %s (debug info 0x%x)\n", 4288 unit->fcp_lun, 4289 unit->port->wwpn, 4290 zfcp_get_busid_by_unit(unit), 4291 fcp_rsp_info[3]); 4292 /* dump SCSI CDB as prepared by zfcp */ 4293 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4294 (char *) &fsf_req->qtcb-> 4295 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4296 zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0); 4297 set_host_byte(&scpnt->result, DID_ERROR); 4298 goto skip_fsfstatus; 4299 } 4300 } 4301 4302 /* check for sense data */ 4303 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { 4304 sns_len = FSF_FCP_RSP_SIZE - 4305 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; 4306 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", 4307 sns_len); 4308 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); 4309 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", 4310 SCSI_SENSE_BUFFERSIZE); 4311 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); 4312 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", 4313 scpnt->result); 4314 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4315 (void *) &scpnt->cmnd, scpnt->cmd_len); 4316 4317 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", 4318 fcp_rsp_iu->fcp_sns_len); 4319 memcpy(&scpnt->sense_buffer, 4320 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); 4321 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4322 (void *) &scpnt->sense_buffer, sns_len); 4323 } 4324 4325 /* check for overrun */ 4326 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { 4327 ZFCP_LOG_INFO("A data overrun was detected for a command. " 4328 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4329 "The response data length is " 4330 "%d, the original length was %d.\n", 4331 unit->fcp_lun, 4332 unit->port->wwpn, 4333 zfcp_get_busid_by_unit(unit), 4334 fcp_rsp_iu->fcp_resid, 4335 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4336 } 4337 4338 /* check for underrun */ 4339 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { 4340 ZFCP_LOG_INFO("A data underrun was detected for a command. " 4341 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4342 "The response data length is " 4343 "%d, the original length was %d.\n", 4344 unit->fcp_lun, 4345 unit->port->wwpn, 4346 zfcp_get_busid_by_unit(unit), 4347 fcp_rsp_iu->fcp_resid, 4348 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4349 4350 scpnt->resid = fcp_rsp_iu->fcp_resid; 4351 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) 4352 set_host_byte(&scpnt->result, DID_ERROR); 4353 } 4354 4355 skip_fsfstatus: 4356 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); 4357 4358 zfcp_cmd_dbf_event_scsi("response", scpnt); 4359 4360 /* cleanup pointer (need this especially for abort) */ 4361 scpnt->host_scribble = NULL; 4362 4363 /* 4364 * NOTE: 4365 * according to the outcome of a discussion on linux-scsi we 4366 * don't need to grab the io_request_lock here since we use 4367 * the new eh 4368 */ 4369 /* always call back */ 4370 4371 (scpnt->scsi_done) (scpnt); 4372 4373 /* 4374 * We must hold this lock until scsi_done has been called. 4375 * Otherwise we may call scsi_done after abort regarding this 4376 * command has completed. 4377 * Note: scsi_done must not block! 4378 */ 4379 out: 4380 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); 4381 return retval; 4382 } 4383 4384 /* 4385 * function: zfcp_fsf_send_fcp_command_task_management_handler 4386 * 4387 * purpose: evaluates FCP_RSP IU 4388 * 4389 * returns: 4390 */ 4391 static int 4392 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) 4393 { 4394 int retval = 0; 4395 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4396 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4397 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4398 struct zfcp_unit *unit = 4399 fsf_req->data.send_fcp_command_task_management.unit; 4400 4401 del_timer(&fsf_req->adapter->scsi_er_timer); 4402 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4403 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4404 goto skip_fsfstatus; 4405 } 4406 4407 /* check FCP_RSP_INFO */ 4408 switch (fcp_rsp_info[3]) { 4409 case RSP_CODE_GOOD: 4410 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n"); 4411 /* ok, continue */ 4412 ZFCP_LOG_DEBUG("no failure or Task Management " 4413 "Function complete\n"); 4414 break; 4415 case RSP_CODE_TASKMAN_UNSUPP: 4416 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_UNSUPP\n"); 4417 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4418 "is not supported on the target device " 4419 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", 4420 unit->fcp_lun, 4421 unit->port->wwpn, 4422 zfcp_get_busid_by_unit(unit)); 4423 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; 4424 break; 4425 case RSP_CODE_TASKMAN_FAILED: 4426 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_FAILED\n"); 4427 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4428 "failed to complete successfully. " 4429 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", 4430 unit->fcp_lun, 4431 unit->port->wwpn, 4432 zfcp_get_busid_by_unit(unit)); 4433 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4434 break; 4435 default: 4436 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4437 "code was detected for a command. " 4438 "unit 0x%016Lx, port 0x%016Lx, adapter %s " 4439 "(debug info 0x%x)\n", 4440 unit->fcp_lun, 4441 unit->port->wwpn, 4442 zfcp_get_busid_by_unit(unit), 4443 fcp_rsp_info[3]); 4444 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4445 } 4446 4447 skip_fsfstatus: 4448 return retval; 4449 } 4450 4451 4452 /* 4453 * function: zfcp_fsf_control_file 4454 * 4455 * purpose: Initiator of the control file upload/download FSF requests 4456 * 4457 * returns: 0 - FSF request is successfuly created and queued 4458 * -EOPNOTSUPP - The FCP adapter does not have Control File support 4459 * -EINVAL - Invalid direction specified 4460 * -ENOMEM - Insufficient memory 4461 * -EPERM - Cannot create FSF request or place it in QDIO queue 4462 */ 4463 int 4464 zfcp_fsf_control_file(struct zfcp_adapter *adapter, 4465 struct zfcp_fsf_req **fsf_req_ptr, 4466 u32 fsf_command, 4467 u32 option, 4468 struct zfcp_sg_list *sg_list) 4469 { 4470 struct zfcp_fsf_req *fsf_req; 4471 struct fsf_qtcb_bottom_support *bottom; 4472 volatile struct qdio_buffer_element *sbale; 4473 struct timer_list *timer; 4474 unsigned long lock_flags; 4475 int req_flags = 0; 4476 int direction; 4477 int retval = 0; 4478 4479 if (!(adapter->supported_features & FSF_FEATURE_CFDC)) { 4480 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", 4481 zfcp_get_busid_by_adapter(adapter)); 4482 retval = -EOPNOTSUPP; 4483 goto out; 4484 } 4485 4486 switch (fsf_command) { 4487 4488 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 4489 direction = SBAL_FLAGS0_TYPE_WRITE; 4490 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && 4491 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) 4492 req_flags = ZFCP_WAIT_FOR_SBAL; 4493 break; 4494 4495 case FSF_QTCB_UPLOAD_CONTROL_FILE: 4496 direction = SBAL_FLAGS0_TYPE_READ; 4497 break; 4498 4499 default: 4500 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); 4501 retval = -EINVAL; 4502 goto out; 4503 } 4504 4505 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); 4506 if (!timer) { 4507 retval = -ENOMEM; 4508 goto out; 4509 } 4510 4511 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, 4512 NULL, &lock_flags, &fsf_req); 4513 if (retval < 0) { 4514 ZFCP_LOG_INFO("error: Could not create FSF request for the " 4515 "adapter %s\n", 4516 zfcp_get_busid_by_adapter(adapter)); 4517 retval = -EPERM; 4518 goto unlock_queue_lock; 4519 } 4520 4521 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4522 sbale[0].flags |= direction; 4523 4524 bottom = &fsf_req->qtcb->bottom.support; 4525 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; 4526 bottom->option = option; 4527 4528 if (sg_list->count > 0) { 4529 int bytes; 4530 4531 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, 4532 sg_list->sg, sg_list->count, 4533 ZFCP_MAX_SBALS_PER_REQ); 4534 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { 4535 ZFCP_LOG_INFO( 4536 "error: Could not create sufficient number of " 4537 "SBALS for an FSF request to the adapter %s\n", 4538 zfcp_get_busid_by_adapter(adapter)); 4539 retval = -ENOMEM; 4540 goto free_fsf_req; 4541 } 4542 } else 4543 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 4544 4545 init_timer(timer); 4546 timer->function = zfcp_fsf_request_timeout_handler; 4547 timer->data = (unsigned long) adapter; 4548 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; 4549 4550 retval = zfcp_fsf_req_send(fsf_req, timer); 4551 if (retval < 0) { 4552 ZFCP_LOG_INFO("initiation of cfdc up/download failed" 4553 "(adapter %s)\n", 4554 zfcp_get_busid_by_adapter(adapter)); 4555 retval = -EPERM; 4556 goto free_fsf_req; 4557 } 4558 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4559 4560 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " 4561 "adapter %s\n", 4562 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? 4563 "download" : "upload", 4564 zfcp_get_busid_by_adapter(adapter)); 4565 4566 wait_event(fsf_req->completion_wq, 4567 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4568 4569 *fsf_req_ptr = fsf_req; 4570 del_timer_sync(timer); 4571 goto free_timer; 4572 4573 free_fsf_req: 4574 zfcp_fsf_req_free(fsf_req); 4575 unlock_queue_lock: 4576 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4577 free_timer: 4578 kfree(timer); 4579 out: 4580 return retval; 4581 } 4582 4583 4584 /* 4585 * function: zfcp_fsf_control_file_handler 4586 * 4587 * purpose: Handler of the control file upload/download FSF requests 4588 * 4589 * returns: 0 - FSF request successfuly processed 4590 * -EAGAIN - Operation has to be repeated because of a temporary problem 4591 * -EACCES - There is no permission to execute an operation 4592 * -EPERM - The control file is not in a right format 4593 * -EIO - There is a problem with the FCP adapter 4594 * -EINVAL - Invalid operation 4595 * -EFAULT - User space memory I/O operation fault 4596 */ 4597 static int 4598 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) 4599 { 4600 struct zfcp_adapter *adapter = fsf_req->adapter; 4601 struct fsf_qtcb_header *header = &fsf_req->qtcb->header; 4602 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; 4603 int retval = 0; 4604 4605 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4606 retval = -EINVAL; 4607 goto skip_fsfstatus; 4608 } 4609 4610 switch (header->fsf_status) { 4611 4612 case FSF_GOOD: 4613 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n"); 4614 ZFCP_LOG_NORMAL( 4615 "The FSF request has been successfully completed " 4616 "on the adapter %s\n", 4617 zfcp_get_busid_by_adapter(adapter)); 4618 break; 4619 4620 case FSF_OPERATION_PARTIALLY_SUCCESSFUL: 4621 ZFCP_LOG_FLAGS(2, "FSF_OPERATION_PARTIALLY_SUCCESSFUL\n"); 4622 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { 4623 switch (header->fsf_status_qual.word[0]) { 4624 4625 case FSF_SQ_CFDC_HARDENED_ON_SE: 4626 ZFCP_LOG_NORMAL( 4627 "CFDC on the adapter %s has being " 4628 "hardened on primary and secondary SE\n", 4629 zfcp_get_busid_by_adapter(adapter)); 4630 break; 4631 4632 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: 4633 ZFCP_LOG_NORMAL( 4634 "CFDC of the adapter %s could not " 4635 "be saved on the SE\n", 4636 zfcp_get_busid_by_adapter(adapter)); 4637 break; 4638 4639 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: 4640 ZFCP_LOG_NORMAL( 4641 "CFDC of the adapter %s could not " 4642 "be copied to the secondary SE\n", 4643 zfcp_get_busid_by_adapter(adapter)); 4644 break; 4645 4646 default: 4647 ZFCP_LOG_NORMAL( 4648 "CFDC could not be hardened " 4649 "on the adapter %s\n", 4650 zfcp_get_busid_by_adapter(adapter)); 4651 } 4652 } 4653 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4654 retval = -EAGAIN; 4655 break; 4656 4657 case FSF_AUTHORIZATION_FAILURE: 4658 ZFCP_LOG_FLAGS(2, "FSF_AUTHORIZATION_FAILURE\n"); 4659 ZFCP_LOG_NORMAL( 4660 "Adapter %s does not accept privileged commands\n", 4661 zfcp_get_busid_by_adapter(adapter)); 4662 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4663 retval = -EACCES; 4664 break; 4665 4666 case FSF_CFDC_ERROR_DETECTED: 4667 ZFCP_LOG_FLAGS(2, "FSF_CFDC_ERROR_DETECTED\n"); 4668 ZFCP_LOG_NORMAL( 4669 "Error at position %d in the CFDC, " 4670 "CFDC is discarded by the adapter %s\n", 4671 header->fsf_status_qual.word[0], 4672 zfcp_get_busid_by_adapter(adapter)); 4673 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4674 retval = -EPERM; 4675 break; 4676 4677 case FSF_CONTROL_FILE_UPDATE_ERROR: 4678 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_UPDATE_ERROR\n"); 4679 ZFCP_LOG_NORMAL( 4680 "Adapter %s cannot harden the control file, " 4681 "file is discarded\n", 4682 zfcp_get_busid_by_adapter(adapter)); 4683 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4684 retval = -EIO; 4685 break; 4686 4687 case FSF_CONTROL_FILE_TOO_LARGE: 4688 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_TOO_LARGE\n"); 4689 ZFCP_LOG_NORMAL( 4690 "Control file is too large, file is discarded " 4691 "by the adapter %s\n", 4692 zfcp_get_busid_by_adapter(adapter)); 4693 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4694 retval = -EIO; 4695 break; 4696 4697 case FSF_ACCESS_CONFLICT_DETECTED: 4698 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_CONFLICT_DETECTED\n"); 4699 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4700 ZFCP_LOG_NORMAL( 4701 "CFDC has been discarded by the adapter %s, " 4702 "because activation would impact " 4703 "%d active connection(s)\n", 4704 zfcp_get_busid_by_adapter(adapter), 4705 header->fsf_status_qual.word[0]); 4706 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4707 retval = -EIO; 4708 break; 4709 4710 case FSF_CONFLICTS_OVERRULED: 4711 ZFCP_LOG_FLAGS(2, "FSF_CONFLICTS_OVERRULED\n"); 4712 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4713 ZFCP_LOG_NORMAL( 4714 "CFDC has been activated on the adapter %s, " 4715 "but activation has impacted " 4716 "%d active connection(s)\n", 4717 zfcp_get_busid_by_adapter(adapter), 4718 header->fsf_status_qual.word[0]); 4719 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4720 retval = -EIO; 4721 break; 4722 4723 case FSF_UNKNOWN_OP_SUBTYPE: 4724 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n"); 4725 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " 4726 "op_subtype=0x%x)\n", 4727 zfcp_get_busid_by_adapter(adapter), 4728 bottom->operation_subtype); 4729 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4730 retval = -EINVAL; 4731 break; 4732 4733 case FSF_INVALID_COMMAND_OPTION: 4734 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n"); 4735 ZFCP_LOG_NORMAL( 4736 "Invalid option 0x%x has been specified " 4737 "in QTCB bottom sent to the adapter %s\n", 4738 bottom->option, 4739 zfcp_get_busid_by_adapter(adapter)); 4740 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4741 retval = -EINVAL; 4742 break; 4743 4744 default: 4745 ZFCP_LOG_NORMAL( 4746 "bug: An unknown/unexpected FSF status 0x%08x " 4747 "was presented on the adapter %s\n", 4748 header->fsf_status, 4749 zfcp_get_busid_by_adapter(adapter)); 4750 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); 4751 debug_exception(fsf_req->adapter->erp_dbf, 0, 4752 &header->fsf_status_qual.word[0], sizeof(u32)); 4753 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4754 retval = -EINVAL; 4755 break; 4756 } 4757 4758 skip_fsfstatus: 4759 return retval; 4760 } 4761 4762 4763 /* 4764 * function: zfcp_fsf_req_wait_and_cleanup 4765 * 4766 * purpose: 4767 * 4768 * FIXME(design): signal seems to be <0 !!! 4769 * returns: 0 - request completed (*status is valid), cleanup succ. 4770 * <0 - request completed (*status is valid), cleanup failed 4771 * >0 - signal which interrupted waiting (*status invalid), 4772 * request not completed, no cleanup 4773 * 4774 * *status is a copy of status of completed fsf_req 4775 */ 4776 int 4777 zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req, 4778 int interruptible, u32 * status) 4779 { 4780 int retval = 0; 4781 int signal = 0; 4782 4783 if (interruptible) { 4784 __wait_event_interruptible(fsf_req->completion_wq, 4785 fsf_req->status & 4786 ZFCP_STATUS_FSFREQ_COMPLETED, 4787 signal); 4788 if (signal) { 4789 ZFCP_LOG_DEBUG("Caught signal %i while waiting for the " 4790 "completion of the request at %p\n", 4791 signal, fsf_req); 4792 retval = signal; 4793 goto out; 4794 } 4795 } else { 4796 __wait_event(fsf_req->completion_wq, 4797 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4798 } 4799 4800 *status = fsf_req->status; 4801 4802 /* cleanup request */ 4803 zfcp_fsf_req_cleanup(fsf_req); 4804 out: 4805 return retval; 4806 } 4807 4808 static inline int 4809 zfcp_fsf_req_sbal_check(unsigned long *flags, 4810 struct zfcp_qdio_queue *queue, int needed) 4811 { 4812 write_lock_irqsave(&queue->queue_lock, *flags); 4813 if (likely(atomic_read(&queue->free_count) >= needed)) 4814 return 1; 4815 write_unlock_irqrestore(&queue->queue_lock, *flags); 4816 return 0; 4817 } 4818 4819 /* 4820 * set qtcb pointer in fsf_req and initialize QTCB 4821 */ 4822 static inline void 4823 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd) 4824 { 4825 if (likely(fsf_req->qtcb != NULL)) { 4826 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req; 4827 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; 4828 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd]; 4829 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; 4830 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req; 4831 fsf_req->qtcb->header.fsf_command = fsf_cmd; 4832 } 4833 } 4834 4835 /** 4836 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue 4837 * @adapter: adapter for which request queue is examined 4838 * @req_flags: flags indicating whether to wait for needed SBAL or not 4839 * @lock_flags: lock_flags if queue_lock is taken 4840 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS 4841 * Locks: lock adapter->request_queue->queue_lock on success 4842 */ 4843 static int 4844 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, 4845 unsigned long *lock_flags) 4846 { 4847 long ret; 4848 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4849 4850 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { 4851 ret = wait_event_interruptible_timeout(adapter->request_wq, 4852 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), 4853 ZFCP_SBAL_TIMEOUT); 4854 if (ret < 0) 4855 return ret; 4856 if (!ret) 4857 return -EIO; 4858 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) 4859 return -EIO; 4860 4861 return 0; 4862 } 4863 4864 /* 4865 * function: zfcp_fsf_req_create 4866 * 4867 * purpose: create an FSF request at the specified adapter and 4868 * setup common fields 4869 * 4870 * returns: -ENOMEM if there was insufficient memory for a request 4871 * -EIO if no qdio buffers could be allocate to the request 4872 * -EINVAL/-EPERM on bug conditions in req_dequeue 4873 * 0 in success 4874 * 4875 * note: The created request is returned by reference. 4876 * 4877 * locks: lock of concerned request queue must not be held, 4878 * but is held on completion (write, irqsave) 4879 */ 4880 int 4881 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, 4882 mempool_t *pool, unsigned long *lock_flags, 4883 struct zfcp_fsf_req **fsf_req_p) 4884 { 4885 volatile struct qdio_buffer_element *sbale; 4886 struct zfcp_fsf_req *fsf_req = NULL; 4887 int ret = 0; 4888 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4889 4890 /* allocate new FSF request */ 4891 fsf_req = zfcp_fsf_req_alloc(pool, req_flags); 4892 if (unlikely(NULL == fsf_req)) { 4893 ZFCP_LOG_DEBUG("error: Could not put an FSF request into" 4894 "the outbound (send) queue.\n"); 4895 ret = -ENOMEM; 4896 goto failed_fsf_req; 4897 } 4898 4899 zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd); 4900 4901 /* initialize waitqueue which may be used to wait on 4902 this request completion */ 4903 init_waitqueue_head(&fsf_req->completion_wq); 4904 4905 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); 4906 if(ret < 0) { 4907 goto failed_sbals; 4908 } 4909 4910 /* 4911 * We hold queue_lock here. Check if QDIOUP is set and let request fail 4912 * if it is not set (see also *_open_qdio and *_close_qdio). 4913 */ 4914 4915 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { 4916 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); 4917 ret = -EIO; 4918 goto failed_sbals; 4919 } 4920 4921 fsf_req->adapter = adapter; /* pointer to "parent" adapter */ 4922 fsf_req->fsf_command = fsf_cmd; 4923 fsf_req->sbal_number = 1; 4924 fsf_req->sbal_first = req_queue->free_index; 4925 fsf_req->sbal_curr = req_queue->free_index; 4926 fsf_req->sbale_curr = 1; 4927 4928 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { 4929 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 4930 } 4931 4932 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4933 4934 /* setup common SBALE fields */ 4935 sbale[0].addr = fsf_req; 4936 sbale[0].flags |= SBAL_FLAGS0_COMMAND; 4937 if (likely(fsf_req->qtcb != NULL)) { 4938 sbale[1].addr = (void *) fsf_req->qtcb; 4939 sbale[1].length = sizeof(struct fsf_qtcb); 4940 } 4941 4942 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", 4943 fsf_req->sbal_number, fsf_req->sbal_first); 4944 4945 goto success; 4946 4947 failed_sbals: 4948 /* dequeue new FSF request previously enqueued */ 4949 zfcp_fsf_req_free(fsf_req); 4950 fsf_req = NULL; 4951 4952 failed_fsf_req: 4953 write_lock_irqsave(&req_queue->queue_lock, *lock_flags); 4954 success: 4955 *fsf_req_p = fsf_req; 4956 return ret; 4957 } 4958 4959 /* 4960 * function: zfcp_fsf_req_send 4961 * 4962 * purpose: start transfer of FSF request via QDIO 4963 * 4964 * returns: 0 - request transfer succesfully started 4965 * !0 - start of request transfer failed 4966 */ 4967 static int 4968 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) 4969 { 4970 struct zfcp_adapter *adapter; 4971 struct zfcp_qdio_queue *req_queue; 4972 volatile struct qdio_buffer_element *sbale; 4973 int new_distance_from_int; 4974 unsigned long flags; 4975 int inc_seq_no = 1; 4976 int retval = 0; 4977 4978 adapter = fsf_req->adapter; 4979 req_queue = &adapter->request_queue, 4980 4981 4982 /* FIXME(debug): remove it later */ 4983 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); 4984 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); 4985 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); 4986 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, 4987 sbale[1].length); 4988 4989 /* set sequence counter in QTCB */ 4990 if (likely(fsf_req->qtcb)) { 4991 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 4992 fsf_req->seq_no = adapter->fsf_req_seq_no; 4993 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets " 4994 "FSF sequence counter value of %i\n", 4995 fsf_req, 4996 zfcp_get_busid_by_adapter(adapter), 4997 fsf_req->qtcb->prefix.req_seq_no); 4998 } else 4999 inc_seq_no = 0; 5000 5001 /* put allocated FSF request at list tail */ 5002 write_lock_irqsave(&adapter->fsf_req_list_lock, flags); 5003 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head); 5004 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 5005 5006 /* figure out expiration time of timeout and start timeout */ 5007 if (unlikely(timer)) { 5008 timer->expires += jiffies; 5009 add_timer(timer); 5010 } 5011 5012 ZFCP_LOG_TRACE("request queue of adapter %s: " 5013 "next free SBAL is %i, %i free SBALs\n", 5014 zfcp_get_busid_by_adapter(adapter), 5015 req_queue->free_index, 5016 atomic_read(&req_queue->free_count)); 5017 5018 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " 5019 "index_in_queue=%i, count=%i, buffers=%p\n", 5020 zfcp_get_busid_by_adapter(adapter), 5021 QDIO_FLAG_SYNC_OUTPUT, 5022 0, fsf_req->sbal_first, fsf_req->sbal_number, 5023 &req_queue->buffer[fsf_req->sbal_first]); 5024 5025 /* 5026 * adjust the number of free SBALs in request queue as well as 5027 * position of first one 5028 */ 5029 atomic_sub(fsf_req->sbal_number, &req_queue->free_count); 5030 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); 5031 req_queue->free_index += fsf_req->sbal_number; /* increase */ 5032 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ 5033 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); 5034 5035 retval = do_QDIO(adapter->ccw_device, 5036 QDIO_FLAG_SYNC_OUTPUT, 5037 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); 5038 5039 if (unlikely(retval)) { 5040 /* Queues are down..... */ 5041 retval = -EIO; 5042 /* 5043 * FIXME(potential race): 5044 * timer might be expired (absolutely unlikely) 5045 */ 5046 if (timer) 5047 del_timer(timer); 5048 write_lock_irqsave(&adapter->fsf_req_list_lock, flags); 5049 list_del(&fsf_req->list); 5050 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 5051 /* 5052 * adjust the number of free SBALs in request queue as well as 5053 * position of first one 5054 */ 5055 zfcp_qdio_zero_sbals(req_queue->buffer, 5056 fsf_req->sbal_first, fsf_req->sbal_number); 5057 atomic_add(fsf_req->sbal_number, &req_queue->free_count); 5058 req_queue->free_index -= fsf_req->sbal_number; /* increase */ 5059 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; 5060 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ 5061 ZFCP_LOG_DEBUG 5062 ("error: do_QDIO failed. Buffers could not be enqueued " 5063 "to request queue.\n"); 5064 } else { 5065 req_queue->distance_from_int = new_distance_from_int; 5066 /* 5067 * increase FSF sequence counter - 5068 * this must only be done for request successfully enqueued to 5069 * QDIO this rejected requests may be cleaned up by calling 5070 * routines resulting in missing sequence counter values 5071 * otherwise, 5072 */ 5073 /* Don't increase for unsolicited status */ 5074 if (likely(inc_seq_no)) { 5075 adapter->fsf_req_seq_no++; 5076 ZFCP_LOG_TRACE 5077 ("FSF sequence counter value of adapter %s " 5078 "increased to %i\n", 5079 zfcp_get_busid_by_adapter(adapter), 5080 adapter->fsf_req_seq_no); 5081 } 5082 /* count FSF requests pending */ 5083 atomic_inc(&adapter->fsf_reqs_active); 5084 } 5085 return retval; 5086 } 5087 5088 /* 5089 * function: zfcp_fsf_req_cleanup 5090 * 5091 * purpose: cleans up an FSF request and removes it from the specified list 5092 * 5093 * returns: 5094 * 5095 * assumption: no pending SB in SBALEs other than QTCB 5096 */ 5097 void 5098 zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req) 5099 { 5100 struct zfcp_adapter *adapter = fsf_req->adapter; 5101 unsigned long flags; 5102 5103 write_lock_irqsave(&adapter->fsf_req_list_lock, flags); 5104 list_del(&fsf_req->list); 5105 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 5106 zfcp_fsf_req_free(fsf_req); 5107 } 5108 5109 #undef ZFCP_LOG_AREA 5110