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 2111 if (xchg_ok) { 2112 adapter->wwnn = bottom->nport_serv_param.wwnn; 2113 adapter->wwpn = bottom->nport_serv_param.wwpn; 2114 adapter->s_id = bottom->s_id & ZFCP_DID_MASK; 2115 adapter->fc_topology = bottom->fc_topology; 2116 adapter->fc_link_speed = bottom->fc_link_speed; 2117 adapter->hydra_version = bottom->adapter_type; 2118 } else { 2119 adapter->wwnn = 0; 2120 adapter->wwpn = 0; 2121 adapter->s_id = 0; 2122 adapter->fc_topology = 0; 2123 adapter->fc_link_speed = 0; 2124 adapter->hydra_version = 0; 2125 } 2126 2127 if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){ 2128 adapter->hardware_version = bottom->hardware_version; 2129 memcpy(adapter->serial_number, bottom->serial_number, 17); 2130 EBCASC(adapter->serial_number, sizeof(adapter->serial_number)); 2131 } 2132 2133 ZFCP_LOG_INFO("The adapter %s reported the following characteristics:\n" 2134 "WWNN 0x%016Lx, " 2135 "WWPN 0x%016Lx, " 2136 "S_ID 0x%08x,\n" 2137 "adapter version 0x%x, " 2138 "LIC version 0x%x, " 2139 "FC link speed %d Gb/s\n", 2140 zfcp_get_busid_by_adapter(adapter), 2141 adapter->wwnn, 2142 adapter->wwpn, 2143 (unsigned int) adapter->s_id, 2144 adapter->hydra_version, 2145 adapter->fsf_lic_version, 2146 adapter->fc_link_speed); 2147 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { 2148 ZFCP_LOG_NORMAL("error: the adapter %s " 2149 "only supports newer control block " 2150 "versions in comparison to this device " 2151 "driver (try updated device driver)\n", 2152 zfcp_get_busid_by_adapter(adapter)); 2153 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); 2154 zfcp_erp_adapter_shutdown(adapter, 0); 2155 return -EIO; 2156 } 2157 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { 2158 ZFCP_LOG_NORMAL("error: the adapter %s " 2159 "only supports older control block " 2160 "versions than this device driver uses" 2161 "(consider a microcode upgrade)\n", 2162 zfcp_get_busid_by_adapter(adapter)); 2163 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); 2164 zfcp_erp_adapter_shutdown(adapter, 0); 2165 return -EIO; 2166 } 2167 return 0; 2168 } 2169 2170 /* 2171 * function: zfcp_fsf_exchange_config_data_handler 2172 * 2173 * purpose: is called for finished Exchange Configuration Data command 2174 * 2175 * returns: 2176 */ 2177 static int 2178 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) 2179 { 2180 struct fsf_qtcb_bottom_config *bottom; 2181 struct zfcp_adapter *adapter = fsf_req->adapter; 2182 2183 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2184 return -EIO; 2185 2186 switch (fsf_req->qtcb->header.fsf_status) { 2187 2188 case FSF_GOOD: 2189 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n"); 2190 2191 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) 2192 return -EIO; 2193 2194 switch (adapter->fc_topology) { 2195 case FSF_TOPO_P2P: 2196 ZFCP_LOG_FLAGS(1, "FSF_TOPO_P2P\n"); 2197 ZFCP_LOG_NORMAL("error: Point-to-point fibrechannel " 2198 "configuration detected at adapter %s " 2199 "unsupported, shutting down adapter\n", 2200 zfcp_get_busid_by_adapter(adapter)); 2201 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2202 "top-p-to-p"); 2203 zfcp_erp_adapter_shutdown(adapter, 0); 2204 return -EIO; 2205 case FSF_TOPO_AL: 2206 ZFCP_LOG_FLAGS(1, "FSF_TOPO_AL\n"); 2207 ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " 2208 "topology detected at adapter %s " 2209 "unsupported, shutting down adapter\n", 2210 zfcp_get_busid_by_adapter(adapter)); 2211 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2212 "top-al"); 2213 zfcp_erp_adapter_shutdown(adapter, 0); 2214 return -EIO; 2215 case FSF_TOPO_FABRIC: 2216 ZFCP_LOG_FLAGS(1, "FSF_TOPO_FABRIC\n"); 2217 ZFCP_LOG_INFO("Switched fabric fibrechannel " 2218 "network detected at adapter %s.\n", 2219 zfcp_get_busid_by_adapter(adapter)); 2220 break; 2221 default: 2222 ZFCP_LOG_NORMAL("bug: The fibrechannel topology " 2223 "reported by the exchange " 2224 "configuration command for " 2225 "the adapter %s is not " 2226 "of a type known to the zfcp " 2227 "driver, shutting down adapter\n", 2228 zfcp_get_busid_by_adapter(adapter)); 2229 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2230 "unknown-topo"); 2231 zfcp_erp_adapter_shutdown(adapter, 0); 2232 return -EIO; 2233 } 2234 bottom = &fsf_req->qtcb->bottom.config; 2235 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 2236 ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " 2237 "allowed by the adapter %s " 2238 "is lower than the minimum " 2239 "required by the driver (%ld bytes).\n", 2240 bottom->max_qtcb_size, 2241 zfcp_get_busid_by_adapter(adapter), 2242 sizeof(struct fsf_qtcb)); 2243 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2244 "qtcb-size"); 2245 debug_event(fsf_req->adapter->erp_dbf, 0, 2246 &bottom->max_qtcb_size, sizeof (u32)); 2247 zfcp_erp_adapter_shutdown(adapter, 0); 2248 return -EIO; 2249 } 2250 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 2251 &adapter->status); 2252 break; 2253 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 2254 debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); 2255 2256 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) 2257 return -EIO; 2258 2259 ZFCP_LOG_INFO("Local link to adapter %s is down\n", 2260 zfcp_get_busid_by_adapter(adapter)); 2261 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | 2262 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, 2263 &adapter->status); 2264 zfcp_erp_adapter_failed(adapter); 2265 break; 2266 default: 2267 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); 2268 debug_event(fsf_req->adapter->erp_dbf, 0, 2269 &fsf_req->qtcb->header.fsf_status, sizeof (u32)); 2270 zfcp_erp_adapter_shutdown(adapter, 0); 2271 return -EIO; 2272 } 2273 return 0; 2274 } 2275 2276 /** 2277 * zfcp_fsf_exchange_port_data - request information about local port 2278 * @adapter: for which port data is requested 2279 * @data: response to exchange port data request 2280 */ 2281 int 2282 zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter, 2283 struct fsf_qtcb_bottom_port *data) 2284 { 2285 volatile struct qdio_buffer_element *sbale; 2286 int retval = 0; 2287 unsigned long lock_flags; 2288 struct zfcp_fsf_req *fsf_req; 2289 struct timer_list *timer; 2290 2291 if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){ 2292 ZFCP_LOG_INFO("error: exchange port data " 2293 "command not supported by adapter %s\n", 2294 zfcp_get_busid_by_adapter(adapter)); 2295 return -EOPNOTSUPP; 2296 } 2297 2298 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); 2299 if (!timer) 2300 return -ENOMEM; 2301 2302 /* setup new FSF request */ 2303 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 2304 0, 0, &lock_flags, &fsf_req); 2305 if (retval < 0) { 2306 ZFCP_LOG_INFO("error: Out of resources. Could not create an " 2307 "exchange port data request for" 2308 "the adapter %s.\n", 2309 zfcp_get_busid_by_adapter(adapter)); 2310 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2311 lock_flags); 2312 goto out; 2313 } 2314 2315 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 2316 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2317 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2318 2319 fsf_req->data.port_data = data; 2320 2321 init_timer(timer); 2322 timer->function = zfcp_fsf_request_timeout_handler; 2323 timer->data = (unsigned long) adapter; 2324 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; 2325 2326 retval = zfcp_fsf_req_send(fsf_req, timer); 2327 if (retval) { 2328 ZFCP_LOG_INFO("error: Could not send an exchange port data " 2329 "command on the adapter %s\n", 2330 zfcp_get_busid_by_adapter(adapter)); 2331 zfcp_fsf_req_free(fsf_req); 2332 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2333 lock_flags); 2334 goto out; 2335 } 2336 2337 ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n", 2338 zfcp_get_busid_by_adapter(adapter)); 2339 2340 write_unlock_irqrestore(&adapter->request_queue.queue_lock, 2341 lock_flags); 2342 2343 wait_event(fsf_req->completion_wq, 2344 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 2345 del_timer_sync(timer); 2346 zfcp_fsf_req_cleanup(fsf_req); 2347 out: 2348 kfree(timer); 2349 return retval; 2350 } 2351 2352 2353 /** 2354 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request 2355 * @fsf_req: pointer to struct zfcp_fsf_req 2356 */ 2357 static void 2358 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) 2359 { 2360 struct fsf_qtcb_bottom_port *bottom; 2361 struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data; 2362 2363 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) 2364 return; 2365 2366 switch (fsf_req->qtcb->header.fsf_status) { 2367 case FSF_GOOD: 2368 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n"); 2369 bottom = &fsf_req->qtcb->bottom.port; 2370 memcpy(data, bottom, sizeof(*data)); 2371 break; 2372 2373 default: 2374 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng"); 2375 debug_event(fsf_req->adapter->erp_dbf, 0, 2376 &fsf_req->qtcb->header.fsf_status, sizeof(u32)); 2377 } 2378 } 2379 2380 2381 /* 2382 * function: zfcp_fsf_open_port 2383 * 2384 * purpose: 2385 * 2386 * returns: address of initiated FSF request 2387 * NULL - request could not be initiated 2388 */ 2389 int 2390 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 2391 { 2392 volatile struct qdio_buffer_element *sbale; 2393 unsigned long lock_flags; 2394 int retval = 0; 2395 2396 /* setup new FSF request */ 2397 retval = zfcp_fsf_req_create(erp_action->adapter, 2398 FSF_QTCB_OPEN_PORT_WITH_DID, 2399 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2400 erp_action->adapter->pool.fsf_req_erp, 2401 &lock_flags, &(erp_action->fsf_req)); 2402 if (retval < 0) { 2403 ZFCP_LOG_INFO("error: Could not create open port request " 2404 "for port 0x%016Lx on adapter %s.\n", 2405 erp_action->port->wwpn, 2406 zfcp_get_busid_by_adapter(erp_action->adapter)); 2407 goto out; 2408 } 2409 2410 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2411 erp_action->fsf_req->sbal_curr, 0); 2412 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2413 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2414 2415 erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; 2416 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); 2417 erp_action->fsf_req->data.open_port.port = erp_action->port; 2418 erp_action->fsf_req->erp_action = erp_action; 2419 2420 /* start QDIO request for this FSF request */ 2421 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2422 if (retval) { 2423 ZFCP_LOG_INFO("error: Could not send open port request for " 2424 "port 0x%016Lx on adapter %s.\n", 2425 erp_action->port->wwpn, 2426 zfcp_get_busid_by_adapter(erp_action->adapter)); 2427 zfcp_fsf_req_free(erp_action->fsf_req); 2428 erp_action->fsf_req = NULL; 2429 goto out; 2430 } 2431 2432 ZFCP_LOG_DEBUG("open port request initiated " 2433 "(adapter %s, port 0x%016Lx)\n", 2434 zfcp_get_busid_by_adapter(erp_action->adapter), 2435 erp_action->port->wwpn); 2436 out: 2437 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2438 lock_flags); 2439 return retval; 2440 } 2441 2442 /* 2443 * function: zfcp_fsf_open_port_handler 2444 * 2445 * purpose: is called for finished Open Port command 2446 * 2447 * returns: 2448 */ 2449 static int 2450 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) 2451 { 2452 int retval = -EINVAL; 2453 struct zfcp_port *port; 2454 struct fsf_plogi *plogi; 2455 struct fsf_qtcb_header *header; 2456 u16 subtable, rule, counter; 2457 2458 port = fsf_req->data.open_port.port; 2459 header = &fsf_req->qtcb->header; 2460 2461 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2462 /* don't change port status in our bookkeeping */ 2463 goto skip_fsfstatus; 2464 } 2465 2466 /* evaluate FSF status in QTCB */ 2467 switch (header->fsf_status) { 2468 2469 case FSF_PORT_ALREADY_OPEN: 2470 ZFCP_LOG_FLAGS(0, "FSF_PORT_ALREADY_OPEN\n"); 2471 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " 2472 "is already open.\n", 2473 port->wwpn, zfcp_get_busid_by_port(port)); 2474 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2475 "fsf_s_popen"); 2476 /* 2477 * This is a bug, however operation should continue normally 2478 * if it is simply ignored 2479 */ 2480 break; 2481 2482 case FSF_ACCESS_DENIED: 2483 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 2484 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " 2485 "on adapter %s\n", 2486 port->wwpn, zfcp_get_busid_by_port(port)); 2487 for (counter = 0; counter < 2; counter++) { 2488 subtable = header->fsf_status_qual.halfword[counter * 2]; 2489 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2490 switch (subtable) { 2491 case FSF_SQ_CFDC_SUBTABLE_OS: 2492 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2493 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2494 case FSF_SQ_CFDC_SUBTABLE_LUN: 2495 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2496 zfcp_act_subtable_type[subtable], rule); 2497 break; 2498 } 2499 } 2500 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2501 zfcp_erp_port_access_denied(port); 2502 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2503 break; 2504 2505 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 2506 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED\n"); 2507 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " 2508 "The remote port 0x%016Lx on adapter %s " 2509 "could not be opened. Disabling it.\n", 2510 port->wwpn, zfcp_get_busid_by_port(port)); 2511 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2512 "fsf_s_max_ports"); 2513 zfcp_erp_port_failed(port); 2514 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2515 break; 2516 2517 case FSF_ADAPTER_STATUS_AVAILABLE: 2518 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 2519 switch (header->fsf_status_qual.word[0]) { 2520 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2521 ZFCP_LOG_FLAGS(2, 2522 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 2523 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2524 "fsf_sq_ltest"); 2525 /* ERP strategy will escalate */ 2526 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2527 break; 2528 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2529 /* ERP strategy will escalate */ 2530 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2531 "fsf_sq_ulp"); 2532 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2533 break; 2534 case FSF_SQ_NO_RETRY_POSSIBLE: 2535 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RETRY_POSSIBLE\n"); 2536 ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " 2537 "adapter %s could not be opened. " 2538 "Disabling it.\n", 2539 port->wwpn, 2540 zfcp_get_busid_by_port(port)); 2541 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 2542 "fsf_sq_no_retry"); 2543 zfcp_erp_port_failed(port); 2544 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2545 break; 2546 default: 2547 ZFCP_LOG_NORMAL 2548 ("bug: Wrong status qualifier 0x%x arrived.\n", 2549 header->fsf_status_qual.word[0]); 2550 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2551 "fsf_sq_inval:"); 2552 debug_exception( 2553 fsf_req->adapter->erp_dbf, 0, 2554 &header->fsf_status_qual.word[0], 2555 sizeof (u32)); 2556 break; 2557 } 2558 break; 2559 2560 case FSF_GOOD: 2561 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 2562 /* save port handle assigned by FSF */ 2563 port->handle = header->port_handle; 2564 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " 2565 "was opened, it's port handle is 0x%x\n", 2566 port->wwpn, zfcp_get_busid_by_port(port), 2567 port->handle); 2568 /* mark port as open */ 2569 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | 2570 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2571 retval = 0; 2572 /* check whether D_ID has changed during open */ 2573 /* 2574 * FIXME: This check is not airtight, as the FCP channel does 2575 * not monitor closures of target port connections caused on 2576 * the remote side. Thus, they might miss out on invalidating 2577 * locally cached WWPNs (and other N_Port parameters) of gone 2578 * target ports. So, our heroic attempt to make things safe 2579 * could be undermined by 'open port' response data tagged with 2580 * obsolete WWPNs. Another reason to monitor potential 2581 * connection closures ourself at least (by interpreting 2582 * incoming ELS' and unsolicited status). It just crosses my 2583 * mind that one should be able to cross-check by means of 2584 * another GID_PN straight after a port has been opened. 2585 * Alternately, an ADISC/PDISC ELS should suffice, as well. 2586 */ 2587 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; 2588 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) 2589 { 2590 if (fsf_req->qtcb->bottom.support.els1_length < 2591 ((((unsigned long) &plogi->serv_param.wwpn) - 2592 ((unsigned long) plogi)) + sizeof (u64))) { 2593 ZFCP_LOG_INFO( 2594 "warning: insufficient length of " 2595 "PLOGI payload (%i)\n", 2596 fsf_req->qtcb->bottom.support.els1_length); 2597 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2598 "fsf_s_short_plogi:"); 2599 /* skip sanity check and assume wwpn is ok */ 2600 } else { 2601 if (plogi->serv_param.wwpn != port->wwpn) { 2602 ZFCP_LOG_INFO("warning: d_id of port " 2603 "0x%016Lx changed during " 2604 "open\n", port->wwpn); 2605 debug_text_event( 2606 fsf_req->adapter->erp_dbf, 0, 2607 "fsf_s_did_change:"); 2608 atomic_clear_mask( 2609 ZFCP_STATUS_PORT_DID_DID, 2610 &port->status); 2611 } else 2612 port->wwnn = plogi->serv_param.wwnn; 2613 } 2614 } 2615 break; 2616 2617 case FSF_UNKNOWN_OP_SUBTYPE: 2618 /* should never occure, subtype not set in zfcp_fsf_open_port */ 2619 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n"); 2620 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " 2621 "op_subtype=0x%x)\n", 2622 zfcp_get_busid_by_port(port), 2623 fsf_req->qtcb->bottom.support.operation_subtype); 2624 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2625 break; 2626 2627 default: 2628 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2629 "(debug info 0x%x)\n", 2630 header->fsf_status); 2631 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2632 debug_exception(fsf_req->adapter->erp_dbf, 0, 2633 &header->fsf_status, sizeof (u32)); 2634 break; 2635 } 2636 2637 skip_fsfstatus: 2638 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); 2639 return retval; 2640 } 2641 2642 /* 2643 * function: zfcp_fsf_close_port 2644 * 2645 * purpose: submit FSF command "close port" 2646 * 2647 * returns: address of initiated FSF request 2648 * NULL - request could not be initiated 2649 */ 2650 int 2651 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 2652 { 2653 volatile struct qdio_buffer_element *sbale; 2654 unsigned long lock_flags; 2655 int retval = 0; 2656 2657 /* setup new FSF request */ 2658 retval = zfcp_fsf_req_create(erp_action->adapter, 2659 FSF_QTCB_CLOSE_PORT, 2660 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2661 erp_action->adapter->pool.fsf_req_erp, 2662 &lock_flags, &(erp_action->fsf_req)); 2663 if (retval < 0) { 2664 ZFCP_LOG_INFO("error: Could not create a close port request " 2665 "for port 0x%016Lx on adapter %s.\n", 2666 erp_action->port->wwpn, 2667 zfcp_get_busid_by_adapter(erp_action->adapter)); 2668 goto out; 2669 } 2670 2671 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2672 erp_action->fsf_req->sbal_curr, 0); 2673 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2674 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2675 2676 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); 2677 erp_action->fsf_req->data.close_port.port = erp_action->port; 2678 erp_action->fsf_req->erp_action = erp_action; 2679 erp_action->fsf_req->qtcb->header.port_handle = 2680 erp_action->port->handle; 2681 2682 /* start QDIO request for this FSF request */ 2683 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2684 if (retval) { 2685 ZFCP_LOG_INFO("error: Could not send a close port request for " 2686 "port 0x%016Lx on adapter %s.\n", 2687 erp_action->port->wwpn, 2688 zfcp_get_busid_by_adapter(erp_action->adapter)); 2689 zfcp_fsf_req_free(erp_action->fsf_req); 2690 erp_action->fsf_req = NULL; 2691 goto out; 2692 } 2693 2694 ZFCP_LOG_TRACE("close port request initiated " 2695 "(adapter %s, port 0x%016Lx)\n", 2696 zfcp_get_busid_by_adapter(erp_action->adapter), 2697 erp_action->port->wwpn); 2698 out: 2699 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2700 lock_flags); 2701 return retval; 2702 } 2703 2704 /* 2705 * function: zfcp_fsf_close_port_handler 2706 * 2707 * purpose: is called for finished Close Port FSF command 2708 * 2709 * returns: 2710 */ 2711 static int 2712 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) 2713 { 2714 int retval = -EINVAL; 2715 struct zfcp_port *port; 2716 2717 port = fsf_req->data.close_port.port; 2718 2719 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2720 /* don't change port status in our bookkeeping */ 2721 goto skip_fsfstatus; 2722 } 2723 2724 /* evaluate FSF status in QTCB */ 2725 switch (fsf_req->qtcb->header.fsf_status) { 2726 2727 case FSF_PORT_HANDLE_NOT_VALID: 2728 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 2729 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 2730 "0x%016Lx on adapter %s invalid. This may happen " 2731 "occasionally.\n", port->handle, 2732 port->wwpn, zfcp_get_busid_by_port(port)); 2733 ZFCP_LOG_DEBUG("status qualifier:\n"); 2734 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2735 (char *) &fsf_req->qtcb->header.fsf_status_qual, 2736 sizeof (union fsf_status_qual)); 2737 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2738 "fsf_s_phand_nv"); 2739 zfcp_erp_adapter_reopen(port->adapter, 0); 2740 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2741 break; 2742 2743 case FSF_ADAPTER_STATUS_AVAILABLE: 2744 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 2745 /* Note: FSF has actually closed the port in this case. 2746 * The status code is just daft. Fingers crossed for a change 2747 */ 2748 retval = 0; 2749 break; 2750 2751 case FSF_GOOD: 2752 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 2753 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " 2754 "port handle 0x%x\n", port->wwpn, 2755 zfcp_get_busid_by_port(port), port->handle); 2756 zfcp_erp_modify_port_status(port, 2757 ZFCP_STATUS_COMMON_OPEN, 2758 ZFCP_CLEAR); 2759 retval = 0; 2760 break; 2761 2762 default: 2763 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2764 "(debug info 0x%x)\n", 2765 fsf_req->qtcb->header.fsf_status); 2766 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2767 debug_exception(fsf_req->adapter->erp_dbf, 0, 2768 &fsf_req->qtcb->header.fsf_status, 2769 sizeof (u32)); 2770 break; 2771 } 2772 2773 skip_fsfstatus: 2774 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); 2775 return retval; 2776 } 2777 2778 /* 2779 * function: zfcp_fsf_close_physical_port 2780 * 2781 * purpose: submit FSF command "close physical port" 2782 * 2783 * returns: address of initiated FSF request 2784 * NULL - request could not be initiated 2785 */ 2786 int 2787 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 2788 { 2789 int retval = 0; 2790 unsigned long lock_flags; 2791 volatile struct qdio_buffer_element *sbale; 2792 2793 /* setup new FSF request */ 2794 retval = zfcp_fsf_req_create(erp_action->adapter, 2795 FSF_QTCB_CLOSE_PHYSICAL_PORT, 2796 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 2797 erp_action->adapter->pool.fsf_req_erp, 2798 &lock_flags, &erp_action->fsf_req); 2799 if (retval < 0) { 2800 ZFCP_LOG_INFO("error: Could not create close physical port " 2801 "request (adapter %s, port 0x%016Lx)\n", 2802 zfcp_get_busid_by_adapter(erp_action->adapter), 2803 erp_action->port->wwpn); 2804 2805 goto out; 2806 } 2807 2808 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 2809 erp_action->fsf_req->sbal_curr, 0); 2810 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 2811 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 2812 2813 /* mark port as being closed */ 2814 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, 2815 &erp_action->port->status); 2816 /* save a pointer to this port */ 2817 erp_action->fsf_req->data.close_physical_port.port = erp_action->port; 2818 /* port to be closeed */ 2819 erp_action->fsf_req->qtcb->header.port_handle = 2820 erp_action->port->handle; 2821 erp_action->fsf_req->erp_action = erp_action; 2822 2823 /* start QDIO request for this FSF request */ 2824 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 2825 if (retval) { 2826 ZFCP_LOG_INFO("error: Could not send close physical port " 2827 "request (adapter %s, port 0x%016Lx)\n", 2828 zfcp_get_busid_by_adapter(erp_action->adapter), 2829 erp_action->port->wwpn); 2830 zfcp_fsf_req_free(erp_action->fsf_req); 2831 erp_action->fsf_req = NULL; 2832 goto out; 2833 } 2834 2835 ZFCP_LOG_TRACE("close physical port request initiated " 2836 "(adapter %s, port 0x%016Lx)\n", 2837 zfcp_get_busid_by_adapter(erp_action->adapter), 2838 erp_action->port->wwpn); 2839 out: 2840 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 2841 lock_flags); 2842 return retval; 2843 } 2844 2845 /* 2846 * function: zfcp_fsf_close_physical_port_handler 2847 * 2848 * purpose: is called for finished Close Physical Port FSF command 2849 * 2850 * returns: 2851 */ 2852 static int 2853 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) 2854 { 2855 int retval = -EINVAL; 2856 struct zfcp_port *port; 2857 struct zfcp_unit *unit; 2858 struct fsf_qtcb_header *header; 2859 u16 subtable, rule, counter; 2860 2861 port = fsf_req->data.close_physical_port.port; 2862 header = &fsf_req->qtcb->header; 2863 2864 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 2865 /* don't change port status in our bookkeeping */ 2866 goto skip_fsfstatus; 2867 } 2868 2869 /* evaluate FSF status in QTCB */ 2870 switch (header->fsf_status) { 2871 2872 case FSF_PORT_HANDLE_NOT_VALID: 2873 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 2874 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" 2875 "(adapter %s, port 0x%016Lx). " 2876 "This may happen occasionally.\n", 2877 port->handle, 2878 zfcp_get_busid_by_port(port), 2879 port->wwpn); 2880 ZFCP_LOG_DEBUG("status qualifier:\n"); 2881 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 2882 (char *) &header->fsf_status_qual, 2883 sizeof (union fsf_status_qual)); 2884 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2885 "fsf_s_phand_nv"); 2886 zfcp_erp_adapter_reopen(port->adapter, 0); 2887 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2888 break; 2889 2890 case FSF_ACCESS_DENIED: 2891 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 2892 ZFCP_LOG_NORMAL("Access denied, cannot close " 2893 "physical port 0x%016Lx on adapter %s\n", 2894 port->wwpn, zfcp_get_busid_by_port(port)); 2895 for (counter = 0; counter < 2; counter++) { 2896 subtable = header->fsf_status_qual.halfword[counter * 2]; 2897 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 2898 switch (subtable) { 2899 case FSF_SQ_CFDC_SUBTABLE_OS: 2900 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 2901 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 2902 case FSF_SQ_CFDC_SUBTABLE_LUN: 2903 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 2904 zfcp_act_subtable_type[subtable], rule); 2905 break; 2906 } 2907 } 2908 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 2909 zfcp_erp_port_access_denied(port); 2910 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2911 break; 2912 2913 case FSF_PORT_BOXED: 2914 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 2915 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " 2916 "%s needs to be reopened but it was attempted " 2917 "to close it physically.\n", 2918 port->wwpn, 2919 zfcp_get_busid_by_port(port)); 2920 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); 2921 zfcp_erp_port_reopen(port, 0); 2922 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 2923 ZFCP_STATUS_FSFREQ_RETRY; 2924 break; 2925 2926 case FSF_ADAPTER_STATUS_AVAILABLE: 2927 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 2928 switch (header->fsf_status_qual.word[0]) { 2929 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 2930 ZFCP_LOG_FLAGS(2, 2931 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 2932 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2933 "fsf_sq_ltest"); 2934 /* This will now be escalated by ERP */ 2935 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2936 break; 2937 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 2938 ZFCP_LOG_FLAGS(2, 2939 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 2940 /* ERP strategy will escalate */ 2941 debug_text_event(fsf_req->adapter->erp_dbf, 1, 2942 "fsf_sq_ulp"); 2943 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2944 break; 2945 default: 2946 ZFCP_LOG_NORMAL 2947 ("bug: Wrong status qualifier 0x%x arrived.\n", 2948 header->fsf_status_qual.word[0]); 2949 debug_text_event(fsf_req->adapter->erp_dbf, 0, 2950 "fsf_sq_inval:"); 2951 debug_exception( 2952 fsf_req->adapter->erp_dbf, 0, 2953 &header->fsf_status_qual.word[0], sizeof (u32)); 2954 break; 2955 } 2956 break; 2957 2958 case FSF_GOOD: 2959 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 2960 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " 2961 "physically closed, port handle 0x%x\n", 2962 port->wwpn, 2963 zfcp_get_busid_by_port(port), port->handle); 2964 /* can't use generic zfcp_erp_modify_port_status because 2965 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 2966 */ 2967 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 2968 list_for_each_entry(unit, &port->unit_list_head, list) 2969 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 2970 retval = 0; 2971 break; 2972 2973 default: 2974 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 2975 "(debug info 0x%x)\n", 2976 header->fsf_status); 2977 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 2978 debug_exception(fsf_req->adapter->erp_dbf, 0, 2979 &header->fsf_status, sizeof (u32)); 2980 break; 2981 } 2982 2983 skip_fsfstatus: 2984 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); 2985 return retval; 2986 } 2987 2988 /* 2989 * function: zfcp_fsf_open_unit 2990 * 2991 * purpose: 2992 * 2993 * returns: 2994 * 2995 * assumptions: This routine does not check whether the associated 2996 * remote port has already been opened. This should be 2997 * done by calling routines. Otherwise some status 2998 * may be presented by FSF 2999 */ 3000 int 3001 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 3002 { 3003 volatile struct qdio_buffer_element *sbale; 3004 unsigned long lock_flags; 3005 int retval = 0; 3006 3007 /* setup new FSF request */ 3008 retval = zfcp_fsf_req_create(erp_action->adapter, 3009 FSF_QTCB_OPEN_LUN, 3010 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3011 erp_action->adapter->pool.fsf_req_erp, 3012 &lock_flags, &(erp_action->fsf_req)); 3013 if (retval < 0) { 3014 ZFCP_LOG_INFO("error: Could not create open unit request for " 3015 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3016 erp_action->unit->fcp_lun, 3017 erp_action->unit->port->wwpn, 3018 zfcp_get_busid_by_adapter(erp_action->adapter)); 3019 goto out; 3020 } 3021 3022 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 3023 erp_action->fsf_req->sbal_curr, 0); 3024 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3025 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3026 3027 erp_action->fsf_req->qtcb->header.port_handle = 3028 erp_action->port->handle; 3029 erp_action->fsf_req->qtcb->bottom.support.fcp_lun = 3030 erp_action->unit->fcp_lun; 3031 erp_action->fsf_req->qtcb->bottom.support.option = 3032 FSF_OPEN_LUN_SUPPRESS_BOXING; 3033 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); 3034 erp_action->fsf_req->data.open_unit.unit = erp_action->unit; 3035 erp_action->fsf_req->erp_action = erp_action; 3036 3037 /* start QDIO request for this FSF request */ 3038 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 3039 if (retval) { 3040 ZFCP_LOG_INFO("error: Could not send an open unit request " 3041 "on the adapter %s, port 0x%016Lx for " 3042 "unit 0x%016Lx\n", 3043 zfcp_get_busid_by_adapter(erp_action->adapter), 3044 erp_action->port->wwpn, 3045 erp_action->unit->fcp_lun); 3046 zfcp_fsf_req_free(erp_action->fsf_req); 3047 erp_action->fsf_req = NULL; 3048 goto out; 3049 } 3050 3051 ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " 3052 "port 0x%016Lx, unit 0x%016Lx)\n", 3053 zfcp_get_busid_by_adapter(erp_action->adapter), 3054 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3055 out: 3056 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3057 lock_flags); 3058 return retval; 3059 } 3060 3061 /* 3062 * function: zfcp_fsf_open_unit_handler 3063 * 3064 * purpose: is called for finished Open LUN command 3065 * 3066 * returns: 3067 */ 3068 static int 3069 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) 3070 { 3071 int retval = -EINVAL; 3072 struct zfcp_adapter *adapter; 3073 struct zfcp_unit *unit; 3074 struct fsf_qtcb_header *header; 3075 struct fsf_qtcb_bottom_support *bottom; 3076 struct fsf_queue_designator *queue_designator; 3077 u16 subtable, rule, counter; 3078 u32 allowed, exclusive, readwrite; 3079 3080 unit = fsf_req->data.open_unit.unit; 3081 3082 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3083 /* don't change unit status in our bookkeeping */ 3084 goto skip_fsfstatus; 3085 } 3086 3087 adapter = fsf_req->adapter; 3088 header = &fsf_req->qtcb->header; 3089 bottom = &fsf_req->qtcb->bottom.support; 3090 queue_designator = &header->fsf_status_qual.fsf_queue_designator; 3091 3092 allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED; 3093 exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE; 3094 readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER; 3095 3096 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | 3097 ZFCP_STATUS_UNIT_SHARED | 3098 ZFCP_STATUS_UNIT_READONLY, 3099 &unit->status); 3100 3101 /* evaluate FSF status in QTCB */ 3102 switch (header->fsf_status) { 3103 3104 case FSF_PORT_HANDLE_NOT_VALID: 3105 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 3106 ZFCP_LOG_INFO("Temporary port identifier 0x%x " 3107 "for port 0x%016Lx on adapter %s invalid " 3108 "This may happen occasionally\n", 3109 unit->port->handle, 3110 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3111 ZFCP_LOG_DEBUG("status qualifier:\n"); 3112 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3113 (char *) &header->fsf_status_qual, 3114 sizeof (union fsf_status_qual)); 3115 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); 3116 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3117 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3118 break; 3119 3120 case FSF_LUN_ALREADY_OPEN: 3121 ZFCP_LOG_FLAGS(0, "FSF_LUN_ALREADY_OPEN\n"); 3122 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " 3123 "remote port 0x%016Lx on adapter %s twice.\n", 3124 unit->fcp_lun, 3125 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3126 debug_text_exception(adapter->erp_dbf, 0, 3127 "fsf_s_uopen"); 3128 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3129 break; 3130 3131 case FSF_ACCESS_DENIED: 3132 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 3133 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " 3134 "remote port 0x%016Lx on adapter %s\n", 3135 unit->fcp_lun, unit->port->wwpn, 3136 zfcp_get_busid_by_unit(unit)); 3137 for (counter = 0; counter < 2; counter++) { 3138 subtable = header->fsf_status_qual.halfword[counter * 2]; 3139 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3140 switch (subtable) { 3141 case FSF_SQ_CFDC_SUBTABLE_OS: 3142 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3143 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3144 case FSF_SQ_CFDC_SUBTABLE_LUN: 3145 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3146 zfcp_act_subtable_type[subtable], rule); 3147 break; 3148 } 3149 } 3150 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); 3151 zfcp_erp_unit_access_denied(unit); 3152 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3153 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3154 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3155 break; 3156 3157 case FSF_PORT_BOXED: 3158 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 3159 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3160 "needs to be reopened\n", 3161 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3162 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); 3163 zfcp_erp_port_reopen(unit->port, 0); 3164 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3165 ZFCP_STATUS_FSFREQ_RETRY; 3166 break; 3167 3168 case FSF_LUN_SHARING_VIOLATION: 3169 ZFCP_LOG_FLAGS(2, "FSF_LUN_SHARING_VIOLATION\n"); 3170 if (header->fsf_status_qual.word[0] != 0) { 3171 ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " 3172 "with WWPN 0x%Lx " 3173 "connected to the adapter %s " 3174 "is already in use in LPAR%d, CSS%d\n", 3175 unit->fcp_lun, 3176 unit->port->wwpn, 3177 zfcp_get_busid_by_unit(unit), 3178 queue_designator->hla, 3179 queue_designator->cssid); 3180 } else { 3181 subtable = header->fsf_status_qual.halfword[4]; 3182 rule = header->fsf_status_qual.halfword[5]; 3183 switch (subtable) { 3184 case FSF_SQ_CFDC_SUBTABLE_OS: 3185 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3186 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3187 case FSF_SQ_CFDC_SUBTABLE_LUN: 3188 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " 3189 "remote port with WWPN 0x%Lx " 3190 "connected to the adapter %s " 3191 "is denied (%s rule %d)\n", 3192 unit->fcp_lun, 3193 unit->port->wwpn, 3194 zfcp_get_busid_by_unit(unit), 3195 zfcp_act_subtable_type[subtable], 3196 rule); 3197 break; 3198 } 3199 } 3200 ZFCP_LOG_DEBUG("status qualifier:\n"); 3201 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3202 (char *) &header->fsf_status_qual, 3203 sizeof (union fsf_status_qual)); 3204 debug_text_event(adapter->erp_dbf, 2, 3205 "fsf_s_l_sh_vio"); 3206 zfcp_erp_unit_access_denied(unit); 3207 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); 3208 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); 3209 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3210 break; 3211 3212 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 3213 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED\n"); 3214 ZFCP_LOG_INFO("error: The adapter ran out of resources. " 3215 "There is no handle (temporary port identifier) " 3216 "available for unit 0x%016Lx on port 0x%016Lx " 3217 "on adapter %s\n", 3218 unit->fcp_lun, 3219 unit->port->wwpn, 3220 zfcp_get_busid_by_unit(unit)); 3221 debug_text_event(adapter->erp_dbf, 1, 3222 "fsf_s_max_units"); 3223 zfcp_erp_unit_failed(unit); 3224 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3225 break; 3226 3227 case FSF_ADAPTER_STATUS_AVAILABLE: 3228 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 3229 switch (header->fsf_status_qual.word[0]) { 3230 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3231 ZFCP_LOG_FLAGS(2, 3232 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 3233 /* Re-establish link to port */ 3234 debug_text_event(adapter->erp_dbf, 1, 3235 "fsf_sq_ltest"); 3236 zfcp_erp_port_reopen(unit->port, 0); 3237 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3238 break; 3239 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3240 ZFCP_LOG_FLAGS(2, 3241 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 3242 /* ERP strategy will escalate */ 3243 debug_text_event(adapter->erp_dbf, 1, 3244 "fsf_sq_ulp"); 3245 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3246 break; 3247 default: 3248 ZFCP_LOG_NORMAL 3249 ("bug: Wrong status qualifier 0x%x arrived.\n", 3250 header->fsf_status_qual.word[0]); 3251 debug_text_event(adapter->erp_dbf, 0, 3252 "fsf_sq_inval:"); 3253 debug_exception(adapter->erp_dbf, 0, 3254 &header->fsf_status_qual.word[0], 3255 sizeof (u32)); 3256 } 3257 break; 3258 3259 case FSF_INVALID_COMMAND_OPTION: 3260 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n"); 3261 ZFCP_LOG_NORMAL( 3262 "Invalid option 0x%x has been specified " 3263 "in QTCB bottom sent to the adapter %s\n", 3264 bottom->option, 3265 zfcp_get_busid_by_adapter(adapter)); 3266 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3267 retval = -EINVAL; 3268 break; 3269 3270 case FSF_GOOD: 3271 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 3272 /* save LUN handle assigned by FSF */ 3273 unit->handle = header->lun_handle; 3274 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " 3275 "adapter %s opened, port handle 0x%x\n", 3276 unit->fcp_lun, 3277 unit->port->wwpn, 3278 zfcp_get_busid_by_unit(unit), 3279 unit->handle); 3280 /* mark unit as open */ 3281 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3282 3283 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){ 3284 if (!exclusive) 3285 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, 3286 &unit->status); 3287 3288 if (!readwrite) { 3289 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, 3290 &unit->status); 3291 ZFCP_LOG_NORMAL("read-only access for unit " 3292 "(adapter %s, wwpn=0x%016Lx, " 3293 "fcp_lun=0x%016Lx)\n", 3294 zfcp_get_busid_by_unit(unit), 3295 unit->port->wwpn, 3296 unit->fcp_lun); 3297 } 3298 3299 if (exclusive && !readwrite) { 3300 ZFCP_LOG_NORMAL("exclusive access of read-only " 3301 "unit not supported\n"); 3302 zfcp_erp_unit_failed(unit); 3303 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3304 zfcp_erp_unit_shutdown(unit, 0); 3305 } else if (!exclusive && readwrite) { 3306 ZFCP_LOG_NORMAL("shared access of read-write " 3307 "unit not supported\n"); 3308 zfcp_erp_unit_failed(unit); 3309 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3310 zfcp_erp_unit_shutdown(unit, 0); 3311 } 3312 } 3313 3314 retval = 0; 3315 break; 3316 3317 default: 3318 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3319 "(debug info 0x%x)\n", 3320 header->fsf_status); 3321 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); 3322 debug_exception(adapter->erp_dbf, 0, 3323 &header->fsf_status, sizeof (u32)); 3324 break; 3325 } 3326 3327 skip_fsfstatus: 3328 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); 3329 return retval; 3330 } 3331 3332 /* 3333 * function: zfcp_fsf_close_unit 3334 * 3335 * purpose: 3336 * 3337 * returns: address of fsf_req - request successfully initiated 3338 * NULL - 3339 * 3340 * assumptions: This routine does not check whether the associated 3341 * remote port/lun has already been opened. This should be 3342 * done by calling routines. Otherwise some status 3343 * may be presented by FSF 3344 */ 3345 int 3346 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 3347 { 3348 volatile struct qdio_buffer_element *sbale; 3349 unsigned long lock_flags; 3350 int retval = 0; 3351 3352 /* setup new FSF request */ 3353 retval = zfcp_fsf_req_create(erp_action->adapter, 3354 FSF_QTCB_CLOSE_LUN, 3355 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, 3356 erp_action->adapter->pool.fsf_req_erp, 3357 &lock_flags, &(erp_action->fsf_req)); 3358 if (retval < 0) { 3359 ZFCP_LOG_INFO("error: Could not create close unit request for " 3360 "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", 3361 erp_action->unit->fcp_lun, 3362 erp_action->port->wwpn, 3363 zfcp_get_busid_by_adapter(erp_action->adapter)); 3364 goto out; 3365 } 3366 3367 sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, 3368 erp_action->fsf_req->sbal_curr, 0); 3369 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; 3370 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3371 3372 erp_action->fsf_req->qtcb->header.port_handle = 3373 erp_action->port->handle; 3374 erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; 3375 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); 3376 erp_action->fsf_req->data.close_unit.unit = erp_action->unit; 3377 erp_action->fsf_req->erp_action = erp_action; 3378 3379 /* start QDIO request for this FSF request */ 3380 retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); 3381 if (retval) { 3382 ZFCP_LOG_INFO("error: Could not send a close unit request for " 3383 "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", 3384 erp_action->unit->fcp_lun, 3385 erp_action->port->wwpn, 3386 zfcp_get_busid_by_adapter(erp_action->adapter)); 3387 zfcp_fsf_req_free(erp_action->fsf_req); 3388 erp_action->fsf_req = NULL; 3389 goto out; 3390 } 3391 3392 ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " 3393 "port 0x%016Lx, unit 0x%016Lx)\n", 3394 zfcp_get_busid_by_adapter(erp_action->adapter), 3395 erp_action->port->wwpn, erp_action->unit->fcp_lun); 3396 out: 3397 write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, 3398 lock_flags); 3399 return retval; 3400 } 3401 3402 /* 3403 * function: zfcp_fsf_close_unit_handler 3404 * 3405 * purpose: is called for finished Close LUN FSF command 3406 * 3407 * returns: 3408 */ 3409 static int 3410 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) 3411 { 3412 int retval = -EINVAL; 3413 struct zfcp_unit *unit; 3414 3415 unit = fsf_req->data.close_unit.unit; /* restore unit */ 3416 3417 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 3418 /* don't change unit status in our bookkeeping */ 3419 goto skip_fsfstatus; 3420 } 3421 3422 /* evaluate FSF status in QTCB */ 3423 switch (fsf_req->qtcb->header.fsf_status) { 3424 3425 case FSF_PORT_HANDLE_NOT_VALID: 3426 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 3427 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3428 "0x%016Lx on adapter %s invalid. This may " 3429 "happen in rare circumstances\n", 3430 unit->port->handle, 3431 unit->port->wwpn, 3432 zfcp_get_busid_by_unit(unit)); 3433 ZFCP_LOG_DEBUG("status qualifier:\n"); 3434 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3435 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3436 sizeof (union fsf_status_qual)); 3437 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3438 "fsf_s_phand_nv"); 3439 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3440 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req, 3441 &fsf_req->qtcb->header.fsf_status_qual, 3442 sizeof (union fsf_status_qual)); 3443 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3444 break; 3445 3446 case FSF_LUN_HANDLE_NOT_VALID: 3447 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n"); 3448 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " 3449 "0x%016Lx on port 0x%016Lx on adapter %s is " 3450 "invalid. This may happen occasionally.\n", 3451 unit->handle, 3452 unit->fcp_lun, 3453 unit->port->wwpn, 3454 zfcp_get_busid_by_unit(unit)); 3455 ZFCP_LOG_DEBUG("Status qualifier data:\n"); 3456 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3457 (char *) &fsf_req->qtcb->header.fsf_status_qual, 3458 sizeof (union fsf_status_qual)); 3459 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3460 "fsf_s_lhand_nv"); 3461 zfcp_erp_port_reopen(unit->port, 0); 3462 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req, 3463 &fsf_req->qtcb->header.fsf_status_qual, 3464 sizeof (union fsf_status_qual)); 3465 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3466 break; 3467 3468 case FSF_PORT_BOXED: 3469 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 3470 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 3471 "needs to be reopened\n", 3472 unit->port->wwpn, 3473 zfcp_get_busid_by_unit(unit)); 3474 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 3475 zfcp_erp_port_reopen(unit->port, 0); 3476 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 3477 ZFCP_STATUS_FSFREQ_RETRY; 3478 break; 3479 3480 case FSF_ADAPTER_STATUS_AVAILABLE: 3481 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 3482 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { 3483 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 3484 ZFCP_LOG_FLAGS(2, 3485 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 3486 /* re-establish link to port */ 3487 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3488 "fsf_sq_ltest"); 3489 zfcp_erp_port_reopen(unit->port, 0); 3490 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3491 break; 3492 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 3493 ZFCP_LOG_FLAGS(2, 3494 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 3495 /* ERP strategy will escalate */ 3496 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3497 "fsf_sq_ulp"); 3498 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3499 break; 3500 default: 3501 ZFCP_LOG_NORMAL 3502 ("bug: Wrong status qualifier 0x%x arrived.\n", 3503 fsf_req->qtcb->header.fsf_status_qual.word[0]); 3504 debug_text_event(fsf_req->adapter->erp_dbf, 0, 3505 "fsf_sq_inval:"); 3506 debug_exception( 3507 fsf_req->adapter->erp_dbf, 0, 3508 &fsf_req->qtcb->header.fsf_status_qual.word[0], 3509 sizeof (u32)); 3510 break; 3511 } 3512 break; 3513 3514 case FSF_GOOD: 3515 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 3516 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " 3517 "closed, port handle 0x%x\n", 3518 unit->fcp_lun, 3519 unit->port->wwpn, 3520 zfcp_get_busid_by_unit(unit), 3521 unit->handle); 3522 /* mark unit as closed */ 3523 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); 3524 retval = 0; 3525 break; 3526 3527 default: 3528 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " 3529 "(debug info 0x%x)\n", 3530 fsf_req->qtcb->header.fsf_status); 3531 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 3532 debug_exception(fsf_req->adapter->erp_dbf, 0, 3533 &fsf_req->qtcb->header.fsf_status, 3534 sizeof (u32)); 3535 break; 3536 } 3537 3538 skip_fsfstatus: 3539 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); 3540 return retval; 3541 } 3542 3543 /** 3544 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) 3545 * @adapter: adapter where scsi command is issued 3546 * @unit: unit where command is sent to 3547 * @scsi_cmnd: scsi command to be sent 3548 * @timer: timer to be started when request is initiated 3549 * @req_flags: flags for fsf_request 3550 */ 3551 int 3552 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, 3553 struct zfcp_unit *unit, 3554 struct scsi_cmnd * scsi_cmnd, 3555 struct timer_list *timer, int req_flags) 3556 { 3557 struct zfcp_fsf_req *fsf_req = NULL; 3558 struct fcp_cmnd_iu *fcp_cmnd_iu; 3559 unsigned int sbtype; 3560 unsigned long lock_flags; 3561 int real_bytes = 0; 3562 int retval = 0; 3563 int mask; 3564 3565 /* setup new FSF request */ 3566 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3567 adapter->pool.fsf_req_scsi, 3568 &lock_flags, &fsf_req); 3569 if (unlikely(retval < 0)) { 3570 ZFCP_LOG_DEBUG("error: Could not create FCP command request " 3571 "for unit 0x%016Lx on port 0x%016Lx on " 3572 "adapter %s\n", 3573 unit->fcp_lun, 3574 unit->port->wwpn, 3575 zfcp_get_busid_by_adapter(adapter)); 3576 goto failed_req_create; 3577 } 3578 3579 /* 3580 * associate FSF request with SCSI request 3581 * (need this for look up on abort) 3582 */ 3583 fsf_req->data.send_fcp_command_task.fsf_req = fsf_req; 3584 scsi_cmnd->host_scribble = (char *) &(fsf_req->data); 3585 3586 /* 3587 * associate SCSI command with FSF request 3588 * (need this for look up on normal command completion) 3589 */ 3590 fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd; 3591 fsf_req->data.send_fcp_command_task.start_jiffies = jiffies; 3592 fsf_req->data.send_fcp_command_task.unit = unit; 3593 ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun); 3594 3595 /* set handles of unit and its parent port in QTCB */ 3596 fsf_req->qtcb->header.lun_handle = unit->handle; 3597 fsf_req->qtcb->header.port_handle = unit->port->handle; 3598 3599 /* FSF does not define the structure of the FCP_CMND IU */ 3600 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3601 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3602 3603 /* 3604 * set depending on data direction: 3605 * data direction bits in SBALE (SB Type) 3606 * data direction bits in QTCB 3607 * data direction bits in FCP_CMND IU 3608 */ 3609 switch (scsi_cmnd->sc_data_direction) { 3610 case DMA_NONE: 3611 ZFCP_LOG_FLAGS(3, "DMA_NONE\n"); 3612 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3613 /* 3614 * FIXME(qdio): 3615 * what is the correct type for commands 3616 * without 'real' data buffers? 3617 */ 3618 sbtype = SBAL_FLAGS0_TYPE_READ; 3619 break; 3620 case DMA_FROM_DEVICE: 3621 ZFCP_LOG_FLAGS(3, "DMA_FROM_DEVICE\n"); 3622 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; 3623 sbtype = SBAL_FLAGS0_TYPE_READ; 3624 fcp_cmnd_iu->rddata = 1; 3625 break; 3626 case DMA_TO_DEVICE: 3627 ZFCP_LOG_FLAGS(3, "DMA_TO_DEVICE\n"); 3628 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; 3629 sbtype = SBAL_FLAGS0_TYPE_WRITE; 3630 fcp_cmnd_iu->wddata = 1; 3631 break; 3632 case DMA_BIDIRECTIONAL: 3633 ZFCP_LOG_FLAGS(0, "DMA_BIDIRECTIONAL not supported\n"); 3634 default: 3635 /* 3636 * dummy, catch this condition earlier 3637 * in zfcp_scsi_queuecommand 3638 */ 3639 goto failed_scsi_cmnd; 3640 } 3641 3642 /* set FC service class in QTCB (3 per default) */ 3643 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class; 3644 3645 /* set FCP_LUN in FCP_CMND IU in QTCB */ 3646 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3647 3648 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; 3649 3650 /* set task attributes in FCP_CMND IU in QTCB */ 3651 if (likely((scsi_cmnd->device->simple_tags) || 3652 (atomic_test_mask(mask, &unit->status)))) 3653 fcp_cmnd_iu->task_attribute = SIMPLE_Q; 3654 else 3655 fcp_cmnd_iu->task_attribute = UNTAGGED; 3656 3657 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ 3658 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { 3659 fcp_cmnd_iu->add_fcp_cdb_length 3660 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; 3661 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " 3662 "additional FCP_CDB length is 0x%x " 3663 "(shifted right 2 bits)\n", 3664 scsi_cmnd->cmd_len, 3665 fcp_cmnd_iu->add_fcp_cdb_length); 3666 } 3667 /* 3668 * copy SCSI CDB (including additional length, if any) to 3669 * FCP_CDB in FCP_CMND IU in QTCB 3670 */ 3671 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3672 3673 /* FCP CMND IU length in QTCB */ 3674 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3675 sizeof (struct fcp_cmnd_iu) + 3676 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); 3677 3678 /* generate SBALEs from data buffer */ 3679 real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); 3680 if (unlikely(real_bytes < 0)) { 3681 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { 3682 ZFCP_LOG_DEBUG( 3683 "Data did not fit into available buffer(s), " 3684 "waiting for more...\n"); 3685 retval = -EIO; 3686 } else { 3687 ZFCP_LOG_NORMAL("error: No truncation implemented but " 3688 "required. Shutting down unit " 3689 "(adapter %s, port 0x%016Lx, " 3690 "unit 0x%016Lx)\n", 3691 zfcp_get_busid_by_unit(unit), 3692 unit->port->wwpn, 3693 unit->fcp_lun); 3694 zfcp_erp_unit_shutdown(unit, 0); 3695 retval = -EINVAL; 3696 } 3697 goto no_fit; 3698 } 3699 3700 /* set length of FCP data length in FCP_CMND IU in QTCB */ 3701 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); 3702 3703 ZFCP_LOG_DEBUG("Sending SCSI command:\n"); 3704 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3705 (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 3706 3707 /* 3708 * start QDIO request for this FSF request 3709 * covered by an SBALE) 3710 */ 3711 retval = zfcp_fsf_req_send(fsf_req, timer); 3712 if (unlikely(retval < 0)) { 3713 ZFCP_LOG_INFO("error: Could not send FCP command request " 3714 "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", 3715 zfcp_get_busid_by_adapter(adapter), 3716 unit->port->wwpn, 3717 unit->fcp_lun); 3718 goto send_failed; 3719 } 3720 3721 ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " 3722 "port 0x%016Lx, unit 0x%016Lx)\n", 3723 zfcp_get_busid_by_adapter(adapter), 3724 unit->port->wwpn, 3725 unit->fcp_lun); 3726 goto success; 3727 3728 send_failed: 3729 no_fit: 3730 failed_scsi_cmnd: 3731 zfcp_fsf_req_free(fsf_req); 3732 fsf_req = NULL; 3733 scsi_cmnd->host_scribble = NULL; 3734 success: 3735 failed_req_create: 3736 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3737 return retval; 3738 } 3739 3740 /* 3741 * function: zfcp_fsf_send_fcp_command_task_management 3742 * 3743 * purpose: 3744 * 3745 * returns: 3746 * 3747 * FIXME(design): should be watched by a timeout!!! 3748 * FIXME(design) shouldn't this be modified to return an int 3749 * also...don't know how though 3750 * 3751 */ 3752 struct zfcp_fsf_req * 3753 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, 3754 struct zfcp_unit *unit, 3755 u8 tm_flags, int req_flags) 3756 { 3757 struct zfcp_fsf_req *fsf_req = NULL; 3758 int retval = 0; 3759 struct fcp_cmnd_iu *fcp_cmnd_iu; 3760 unsigned long lock_flags; 3761 volatile struct qdio_buffer_element *sbale; 3762 3763 /* setup new FSF request */ 3764 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, 3765 adapter->pool.fsf_req_scsi, 3766 &lock_flags, &fsf_req); 3767 if (retval < 0) { 3768 ZFCP_LOG_INFO("error: Could not create FCP command (task " 3769 "management) request for adapter %s, port " 3770 " 0x%016Lx, unit 0x%016Lx.\n", 3771 zfcp_get_busid_by_adapter(adapter), 3772 unit->port->wwpn, unit->fcp_lun); 3773 goto out; 3774 } 3775 3776 /* 3777 * Used to decide on proper handler in the return path, 3778 * could be either zfcp_fsf_send_fcp_command_task_handler or 3779 * zfcp_fsf_send_fcp_command_task_management_handler */ 3780 3781 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; 3782 3783 /* 3784 * hold a pointer to the unit being target of this 3785 * task management request 3786 */ 3787 fsf_req->data.send_fcp_command_task_management.unit = unit; 3788 3789 /* set FSF related fields in QTCB */ 3790 fsf_req->qtcb->header.lun_handle = unit->handle; 3791 fsf_req->qtcb->header.port_handle = unit->port->handle; 3792 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 3793 fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class; 3794 fsf_req->qtcb->bottom.io.fcp_cmnd_length = 3795 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); 3796 3797 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 3798 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; 3799 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 3800 3801 /* set FCP related fields in FCP_CMND IU in QTCB */ 3802 fcp_cmnd_iu = (struct fcp_cmnd_iu *) 3803 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 3804 fcp_cmnd_iu->fcp_lun = unit->fcp_lun; 3805 fcp_cmnd_iu->task_management_flags = tm_flags; 3806 3807 /* start QDIO request for this FSF request */ 3808 zfcp_fsf_start_scsi_er_timer(adapter); 3809 retval = zfcp_fsf_req_send(fsf_req, NULL); 3810 if (retval) { 3811 del_timer(&adapter->scsi_er_timer); 3812 ZFCP_LOG_INFO("error: Could not send an FCP-command (task " 3813 "management) on adapter %s, port 0x%016Lx for " 3814 "unit LUN 0x%016Lx\n", 3815 zfcp_get_busid_by_adapter(adapter), 3816 unit->port->wwpn, 3817 unit->fcp_lun); 3818 zfcp_fsf_req_free(fsf_req); 3819 fsf_req = NULL; 3820 goto out; 3821 } 3822 3823 ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " 3824 "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " 3825 "tm_flags=0x%x)\n", 3826 zfcp_get_busid_by_adapter(adapter), 3827 unit->port->wwpn, 3828 unit->fcp_lun, 3829 tm_flags); 3830 out: 3831 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 3832 return fsf_req; 3833 } 3834 3835 /* 3836 * function: zfcp_fsf_send_fcp_command_handler 3837 * 3838 * purpose: is called for finished Send FCP Command 3839 * 3840 * returns: 3841 */ 3842 static int 3843 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 3844 { 3845 int retval = -EINVAL; 3846 struct zfcp_unit *unit; 3847 struct fsf_qtcb_header *header; 3848 u16 subtable, rule, counter; 3849 3850 header = &fsf_req->qtcb->header; 3851 3852 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) 3853 unit = fsf_req->data.send_fcp_command_task_management.unit; 3854 else 3855 unit = fsf_req->data.send_fcp_command_task.unit; 3856 3857 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 3858 /* go directly to calls of special handlers */ 3859 goto skip_fsfstatus; 3860 } 3861 3862 /* evaluate FSF status in QTCB */ 3863 switch (header->fsf_status) { 3864 3865 case FSF_PORT_HANDLE_NOT_VALID: 3866 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n"); 3867 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " 3868 "0x%016Lx on adapter %s invalid\n", 3869 unit->port->handle, 3870 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 3871 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3872 (char *) &header->fsf_status_qual, 3873 sizeof (union fsf_status_qual)); 3874 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3875 "fsf_s_phand_nv"); 3876 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3877 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3878 break; 3879 3880 case FSF_LUN_HANDLE_NOT_VALID: 3881 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n"); 3882 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " 3883 "0x%016Lx on port 0x%016Lx on adapter %s is " 3884 "invalid. This may happen occasionally.\n", 3885 unit->handle, 3886 unit->fcp_lun, 3887 unit->port->wwpn, 3888 zfcp_get_busid_by_unit(unit)); 3889 ZFCP_LOG_NORMAL("Status qualifier data:\n"); 3890 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3891 (char *) &header->fsf_status_qual, 3892 sizeof (union fsf_status_qual)); 3893 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3894 "fsf_s_uhand_nv"); 3895 zfcp_erp_port_reopen(unit->port, 0); 3896 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3897 break; 3898 3899 case FSF_HANDLE_MISMATCH: 3900 ZFCP_LOG_FLAGS(0, "FSF_HANDLE_MISMATCH\n"); 3901 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " 3902 "unexpectedly. (adapter %s, port 0x%016Lx, " 3903 "unit 0x%016Lx)\n", 3904 unit->port->handle, 3905 zfcp_get_busid_by_unit(unit), 3906 unit->port->wwpn, 3907 unit->fcp_lun); 3908 ZFCP_LOG_NORMAL("status qualifier:\n"); 3909 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, 3910 (char *) &header->fsf_status_qual, 3911 sizeof (union fsf_status_qual)); 3912 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3913 "fsf_s_hand_mis"); 3914 zfcp_erp_adapter_reopen(unit->port->adapter, 0); 3915 zfcp_cmd_dbf_event_fsf("handmism", 3916 fsf_req, 3917 &header->fsf_status_qual, 3918 sizeof (union fsf_status_qual)); 3919 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3920 break; 3921 3922 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 3923 ZFCP_LOG_FLAGS(0, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n"); 3924 if (fsf_req->adapter->fc_service_class <= 3) { 3925 ZFCP_LOG_NORMAL("error: The adapter %s does " 3926 "not support fibrechannel class %d.\n", 3927 zfcp_get_busid_by_unit(unit), 3928 fsf_req->adapter->fc_service_class); 3929 } else { 3930 ZFCP_LOG_NORMAL("bug: The fibrechannel class at " 3931 "adapter %s is invalid. " 3932 "(debug info %d)\n", 3933 zfcp_get_busid_by_unit(unit), 3934 fsf_req->adapter->fc_service_class); 3935 } 3936 /* stop operation for this adapter */ 3937 debug_text_exception(fsf_req->adapter->erp_dbf, 0, 3938 "fsf_s_class_nsup"); 3939 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 3940 zfcp_cmd_dbf_event_fsf("unsclass", 3941 fsf_req, 3942 &header->fsf_status_qual, 3943 sizeof (union fsf_status_qual)); 3944 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3945 break; 3946 3947 case FSF_FCPLUN_NOT_VALID: 3948 ZFCP_LOG_FLAGS(0, "FSF_FCPLUN_NOT_VALID\n"); 3949 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " 3950 "adapter %s does not have correct unit " 3951 "handle 0x%x\n", 3952 unit->fcp_lun, 3953 unit->port->wwpn, 3954 zfcp_get_busid_by_unit(unit), 3955 unit->handle); 3956 ZFCP_LOG_DEBUG("status qualifier:\n"); 3957 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 3958 (char *) &header->fsf_status_qual, 3959 sizeof (union fsf_status_qual)); 3960 debug_text_event(fsf_req->adapter->erp_dbf, 1, 3961 "fsf_s_fcp_lun_nv"); 3962 zfcp_erp_port_reopen(unit->port, 0); 3963 zfcp_cmd_dbf_event_fsf("fluninv", 3964 fsf_req, 3965 &header->fsf_status_qual, 3966 sizeof (union fsf_status_qual)); 3967 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3968 break; 3969 3970 case FSF_ACCESS_DENIED: 3971 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n"); 3972 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " 3973 "unit 0x%016Lx on port 0x%016Lx on " 3974 "adapter %s\n", unit->fcp_lun, unit->port->wwpn, 3975 zfcp_get_busid_by_unit(unit)); 3976 for (counter = 0; counter < 2; counter++) { 3977 subtable = header->fsf_status_qual.halfword[counter * 2]; 3978 rule = header->fsf_status_qual.halfword[counter * 2 + 1]; 3979 switch (subtable) { 3980 case FSF_SQ_CFDC_SUBTABLE_OS: 3981 case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: 3982 case FSF_SQ_CFDC_SUBTABLE_PORT_DID: 3983 case FSF_SQ_CFDC_SUBTABLE_LUN: 3984 ZFCP_LOG_INFO("Access denied (%s rule %d)\n", 3985 zfcp_act_subtable_type[subtable], rule); 3986 break; 3987 } 3988 } 3989 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); 3990 zfcp_erp_unit_access_denied(unit); 3991 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 3992 break; 3993 3994 case FSF_DIRECTION_INDICATOR_NOT_VALID: 3995 ZFCP_LOG_FLAGS(0, "FSF_DIRECTION_INDICATOR_NOT_VALID\n"); 3996 ZFCP_LOG_INFO("bug: Invalid data direction given for unit " 3997 "0x%016Lx on port 0x%016Lx on adapter %s " 3998 "(debug info %d)\n", 3999 unit->fcp_lun, 4000 unit->port->wwpn, 4001 zfcp_get_busid_by_unit(unit), 4002 fsf_req->qtcb->bottom.io.data_direction); 4003 /* stop operation for this adapter */ 4004 debug_text_event(fsf_req->adapter->erp_dbf, 0, 4005 "fsf_s_dir_ind_nv"); 4006 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 4007 zfcp_cmd_dbf_event_fsf("dirinv", 4008 fsf_req, 4009 &header->fsf_status_qual, 4010 sizeof (union fsf_status_qual)); 4011 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4012 break; 4013 4014 case FSF_CMND_LENGTH_NOT_VALID: 4015 ZFCP_LOG_FLAGS(0, "FSF_CMND_LENGTH_NOT_VALID\n"); 4016 ZFCP_LOG_NORMAL 4017 ("bug: An invalid control-data-block length field " 4018 "was found in a command for unit 0x%016Lx on port " 4019 "0x%016Lx on adapter %s " "(debug info %d)\n", 4020 unit->fcp_lun, unit->port->wwpn, 4021 zfcp_get_busid_by_unit(unit), 4022 fsf_req->qtcb->bottom.io.fcp_cmnd_length); 4023 /* stop operation for this adapter */ 4024 debug_text_event(fsf_req->adapter->erp_dbf, 0, 4025 "fsf_s_cmd_len_nv"); 4026 zfcp_erp_adapter_shutdown(unit->port->adapter, 0); 4027 zfcp_cmd_dbf_event_fsf("cleninv", 4028 fsf_req, 4029 &header->fsf_status_qual, 4030 sizeof (union fsf_status_qual)); 4031 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4032 break; 4033 4034 case FSF_PORT_BOXED: 4035 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n"); 4036 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " 4037 "needs to be reopened\n", 4038 unit->port->wwpn, zfcp_get_busid_by_unit(unit)); 4039 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); 4040 zfcp_erp_port_reopen(unit->port, 0); 4041 zfcp_cmd_dbf_event_fsf("portbox", fsf_req, 4042 &header->fsf_status_qual, 4043 sizeof (union fsf_status_qual)); 4044 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | 4045 ZFCP_STATUS_FSFREQ_RETRY; 4046 break; 4047 4048 case FSF_LUN_BOXED: 4049 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n"); 4050 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " 4051 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", 4052 zfcp_get_busid_by_unit(unit), 4053 unit->port->wwpn, unit->fcp_lun); 4054 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); 4055 zfcp_erp_unit_reopen(unit, 0); 4056 zfcp_cmd_dbf_event_fsf("unitbox", fsf_req, 4057 &header->fsf_status_qual, 4058 sizeof(union fsf_status_qual)); 4059 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR 4060 | ZFCP_STATUS_FSFREQ_RETRY; 4061 break; 4062 4063 case FSF_ADAPTER_STATUS_AVAILABLE: 4064 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n"); 4065 switch (header->fsf_status_qual.word[0]) { 4066 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 4067 ZFCP_LOG_FLAGS(2, 4068 "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n"); 4069 /* re-establish link to port */ 4070 debug_text_event(fsf_req->adapter->erp_dbf, 1, 4071 "fsf_sq_ltest"); 4072 zfcp_erp_port_reopen(unit->port, 0); 4073 zfcp_cmd_dbf_event_fsf( 4074 "sqltest", 4075 fsf_req, 4076 &header->fsf_status_qual, 4077 sizeof (union fsf_status_qual)); 4078 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4079 break; 4080 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 4081 ZFCP_LOG_FLAGS(3, 4082 "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n"); 4083 /* FIXME(hw) need proper specs for proper action */ 4084 /* let scsi stack deal with retries and escalation */ 4085 debug_text_event(fsf_req->adapter->erp_dbf, 1, 4086 "fsf_sq_ulp"); 4087 zfcp_cmd_dbf_event_fsf( 4088 "sqdeperp", 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 default: 4095 /* FIXME: shall we consider this a successful transfer? */ 4096 ZFCP_LOG_NORMAL 4097 ("bug: Wrong status qualifier 0x%x arrived.\n", 4098 header->fsf_status_qual.word[0]); 4099 debug_text_event(fsf_req->adapter->erp_dbf, 0, 4100 "fsf_sq_inval:"); 4101 debug_exception(fsf_req->adapter->erp_dbf, 0, 4102 &header->fsf_status_qual.word[0], 4103 sizeof(u32)); 4104 break; 4105 } 4106 break; 4107 4108 case FSF_GOOD: 4109 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n"); 4110 break; 4111 4112 case FSF_FCP_RSP_AVAILABLE: 4113 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n"); 4114 break; 4115 4116 default: 4117 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); 4118 debug_exception(fsf_req->adapter->erp_dbf, 0, 4119 &header->fsf_status, sizeof(u32)); 4120 break; 4121 } 4122 4123 skip_fsfstatus: 4124 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { 4125 retval = 4126 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); 4127 } else { 4128 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); 4129 } 4130 return retval; 4131 } 4132 4133 /* 4134 * function: zfcp_fsf_send_fcp_command_task_handler 4135 * 4136 * purpose: evaluates FCP_RSP IU 4137 * 4138 * returns: 4139 */ 4140 static int 4141 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) 4142 { 4143 int retval = 0; 4144 struct scsi_cmnd *scpnt; 4145 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4146 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4147 struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) 4148 &(fsf_req->qtcb->bottom.io.fcp_cmnd); 4149 u32 sns_len; 4150 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4151 unsigned long flags; 4152 struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit; 4153 4154 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); 4155 scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd; 4156 if (unlikely(!scpnt)) { 4157 ZFCP_LOG_DEBUG 4158 ("Command with fsf_req %p is not associated to " 4159 "a scsi command anymore. Aborted?\n", fsf_req); 4160 goto out; 4161 } 4162 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { 4163 /* FIXME: (design) mid-layer should handle DID_ABORT like 4164 * DID_SOFT_ERROR by retrying the request for devices 4165 * that allow retries. 4166 */ 4167 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); 4168 set_host_byte(&scpnt->result, DID_SOFT_ERROR); 4169 set_driver_byte(&scpnt->result, SUGGEST_RETRY); 4170 goto skip_fsfstatus; 4171 } 4172 4173 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 4174 ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); 4175 set_host_byte(&scpnt->result, DID_ERROR); 4176 goto skip_fsfstatus; 4177 } 4178 4179 /* set message byte of result in SCSI command */ 4180 scpnt->result |= COMMAND_COMPLETE << 8; 4181 4182 /* 4183 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte 4184 * of result in SCSI command 4185 */ 4186 scpnt->result |= fcp_rsp_iu->scsi_status; 4187 if (unlikely(fcp_rsp_iu->scsi_status)) { 4188 /* DEBUG */ 4189 ZFCP_LOG_DEBUG("status for SCSI Command:\n"); 4190 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4191 scpnt->cmnd, scpnt->cmd_len); 4192 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", 4193 fcp_rsp_iu->scsi_status); 4194 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4195 (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); 4196 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4197 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), 4198 fcp_rsp_iu->fcp_sns_len); 4199 } 4200 4201 /* check FCP_RSP_INFO */ 4202 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { 4203 ZFCP_LOG_DEBUG("rsp_len is valid\n"); 4204 switch (fcp_rsp_info[3]) { 4205 case RSP_CODE_GOOD: 4206 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n"); 4207 /* ok, continue */ 4208 ZFCP_LOG_TRACE("no failure or Task Management " 4209 "Function complete\n"); 4210 set_host_byte(&scpnt->result, DID_OK); 4211 break; 4212 case RSP_CODE_LENGTH_MISMATCH: 4213 ZFCP_LOG_FLAGS(0, "RSP_CODE_LENGTH_MISMATCH\n"); 4214 /* hardware bug */ 4215 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4216 "that the fibrechannel protocol data " 4217 "length differs from the burst length. " 4218 "The problem occured on unit 0x%016Lx " 4219 "on port 0x%016Lx on adapter %s", 4220 unit->fcp_lun, 4221 unit->port->wwpn, 4222 zfcp_get_busid_by_unit(unit)); 4223 /* dump SCSI CDB as prepared by zfcp */ 4224 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4225 (char *) &fsf_req->qtcb-> 4226 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4227 zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0); 4228 set_host_byte(&scpnt->result, DID_ERROR); 4229 goto skip_fsfstatus; 4230 case RSP_CODE_FIELD_INVALID: 4231 ZFCP_LOG_FLAGS(0, "RSP_CODE_FIELD_INVALID\n"); 4232 /* driver or hardware bug */ 4233 ZFCP_LOG_NORMAL("bug: FCP response code indictates " 4234 "that the fibrechannel protocol data " 4235 "fields were incorrectly set up. " 4236 "The problem occured on the unit " 4237 "0x%016Lx on port 0x%016Lx on " 4238 "adapter %s", 4239 unit->fcp_lun, 4240 unit->port->wwpn, 4241 zfcp_get_busid_by_unit(unit)); 4242 /* dump SCSI CDB as prepared by zfcp */ 4243 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4244 (char *) &fsf_req->qtcb-> 4245 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4246 set_host_byte(&scpnt->result, DID_ERROR); 4247 zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0); 4248 goto skip_fsfstatus; 4249 case RSP_CODE_RO_MISMATCH: 4250 ZFCP_LOG_FLAGS(0, "RSP_CODE_RO_MISMATCH\n"); 4251 /* hardware bug */ 4252 ZFCP_LOG_NORMAL("bug: The FCP response code indicates " 4253 "that conflicting values for the " 4254 "fibrechannel payload offset from the " 4255 "header were found. " 4256 "The problem occured on unit 0x%016Lx " 4257 "on port 0x%016Lx on adapter %s.\n", 4258 unit->fcp_lun, 4259 unit->port->wwpn, 4260 zfcp_get_busid_by_unit(unit)); 4261 /* dump SCSI CDB as prepared by zfcp */ 4262 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4263 (char *) &fsf_req->qtcb-> 4264 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4265 zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0); 4266 set_host_byte(&scpnt->result, DID_ERROR); 4267 goto skip_fsfstatus; 4268 default: 4269 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4270 "code was detected for a command. " 4271 "The problem occured on the unit " 4272 "0x%016Lx on port 0x%016Lx on " 4273 "adapter %s (debug info 0x%x)\n", 4274 unit->fcp_lun, 4275 unit->port->wwpn, 4276 zfcp_get_busid_by_unit(unit), 4277 fcp_rsp_info[3]); 4278 /* dump SCSI CDB as prepared by zfcp */ 4279 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, 4280 (char *) &fsf_req->qtcb-> 4281 bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); 4282 zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0); 4283 set_host_byte(&scpnt->result, DID_ERROR); 4284 } 4285 } 4286 4287 /* check for sense data */ 4288 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { 4289 sns_len = FSF_FCP_RSP_SIZE - 4290 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; 4291 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", 4292 sns_len); 4293 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); 4294 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", 4295 SCSI_SENSE_BUFFERSIZE); 4296 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); 4297 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", 4298 scpnt->result); 4299 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4300 (void *) &scpnt->cmnd, scpnt->cmd_len); 4301 4302 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", 4303 fcp_rsp_iu->fcp_sns_len); 4304 memcpy(&scpnt->sense_buffer, 4305 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); 4306 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, 4307 (void *) &scpnt->sense_buffer, sns_len); 4308 } 4309 4310 /* check for overrun */ 4311 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { 4312 ZFCP_LOG_INFO("A data overrun was detected for a command. " 4313 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4314 "The response data length is " 4315 "%d, the original length was %d.\n", 4316 unit->fcp_lun, 4317 unit->port->wwpn, 4318 zfcp_get_busid_by_unit(unit), 4319 fcp_rsp_iu->fcp_resid, 4320 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4321 } 4322 4323 /* check for underrun */ 4324 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { 4325 ZFCP_LOG_INFO("A data underrun was detected for a command. " 4326 "unit 0x%016Lx, port 0x%016Lx, adapter %s. " 4327 "The response data length is " 4328 "%d, the original length was %d.\n", 4329 unit->fcp_lun, 4330 unit->port->wwpn, 4331 zfcp_get_busid_by_unit(unit), 4332 fcp_rsp_iu->fcp_resid, 4333 (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); 4334 4335 scpnt->resid = fcp_rsp_iu->fcp_resid; 4336 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) 4337 scpnt->result |= DID_ERROR << 16; 4338 } 4339 4340 skip_fsfstatus: 4341 ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); 4342 4343 zfcp_cmd_dbf_event_scsi("response", scpnt); 4344 4345 /* cleanup pointer (need this especially for abort) */ 4346 scpnt->host_scribble = NULL; 4347 4348 /* 4349 * NOTE: 4350 * according to the outcome of a discussion on linux-scsi we 4351 * don't need to grab the io_request_lock here since we use 4352 * the new eh 4353 */ 4354 /* always call back */ 4355 4356 (scpnt->scsi_done) (scpnt); 4357 4358 /* 4359 * We must hold this lock until scsi_done has been called. 4360 * Otherwise we may call scsi_done after abort regarding this 4361 * command has completed. 4362 * Note: scsi_done must not block! 4363 */ 4364 out: 4365 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); 4366 return retval; 4367 } 4368 4369 /* 4370 * function: zfcp_fsf_send_fcp_command_task_management_handler 4371 * 4372 * purpose: evaluates FCP_RSP IU 4373 * 4374 * returns: 4375 */ 4376 static int 4377 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) 4378 { 4379 int retval = 0; 4380 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) 4381 &(fsf_req->qtcb->bottom.io.fcp_rsp); 4382 char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); 4383 struct zfcp_unit *unit = 4384 fsf_req->data.send_fcp_command_task_management.unit; 4385 4386 del_timer(&fsf_req->adapter->scsi_er_timer); 4387 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4388 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4389 goto skip_fsfstatus; 4390 } 4391 4392 /* check FCP_RSP_INFO */ 4393 switch (fcp_rsp_info[3]) { 4394 case RSP_CODE_GOOD: 4395 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n"); 4396 /* ok, continue */ 4397 ZFCP_LOG_DEBUG("no failure or Task Management " 4398 "Function complete\n"); 4399 break; 4400 case RSP_CODE_TASKMAN_UNSUPP: 4401 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_UNSUPP\n"); 4402 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4403 "is not supported on the target device " 4404 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", 4405 unit->fcp_lun, 4406 unit->port->wwpn, 4407 zfcp_get_busid_by_unit(unit)); 4408 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; 4409 break; 4410 case RSP_CODE_TASKMAN_FAILED: 4411 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_FAILED\n"); 4412 ZFCP_LOG_NORMAL("bug: A reuested task management function " 4413 "failed to complete successfully. " 4414 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", 4415 unit->fcp_lun, 4416 unit->port->wwpn, 4417 zfcp_get_busid_by_unit(unit)); 4418 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4419 break; 4420 default: 4421 ZFCP_LOG_NORMAL("bug: An invalid FCP response " 4422 "code was detected for a command. " 4423 "unit 0x%016Lx, port 0x%016Lx, adapter %s " 4424 "(debug info 0x%x)\n", 4425 unit->fcp_lun, 4426 unit->port->wwpn, 4427 zfcp_get_busid_by_unit(unit), 4428 fcp_rsp_info[3]); 4429 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 4430 } 4431 4432 skip_fsfstatus: 4433 return retval; 4434 } 4435 4436 4437 /* 4438 * function: zfcp_fsf_control_file 4439 * 4440 * purpose: Initiator of the control file upload/download FSF requests 4441 * 4442 * returns: 0 - FSF request is successfuly created and queued 4443 * -EOPNOTSUPP - The FCP adapter does not have Control File support 4444 * -EINVAL - Invalid direction specified 4445 * -ENOMEM - Insufficient memory 4446 * -EPERM - Cannot create FSF request or place it in QDIO queue 4447 */ 4448 int 4449 zfcp_fsf_control_file(struct zfcp_adapter *adapter, 4450 struct zfcp_fsf_req **fsf_req_ptr, 4451 u32 fsf_command, 4452 u32 option, 4453 struct zfcp_sg_list *sg_list) 4454 { 4455 struct zfcp_fsf_req *fsf_req; 4456 struct fsf_qtcb_bottom_support *bottom; 4457 volatile struct qdio_buffer_element *sbale; 4458 struct timer_list *timer; 4459 unsigned long lock_flags; 4460 int req_flags = 0; 4461 int direction; 4462 int retval = 0; 4463 4464 if (!(adapter->supported_features & FSF_FEATURE_CFDC)) { 4465 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", 4466 zfcp_get_busid_by_adapter(adapter)); 4467 retval = -EOPNOTSUPP; 4468 goto out; 4469 } 4470 4471 switch (fsf_command) { 4472 4473 case FSF_QTCB_DOWNLOAD_CONTROL_FILE: 4474 direction = SBAL_FLAGS0_TYPE_WRITE; 4475 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && 4476 (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) 4477 req_flags = ZFCP_WAIT_FOR_SBAL; 4478 break; 4479 4480 case FSF_QTCB_UPLOAD_CONTROL_FILE: 4481 direction = SBAL_FLAGS0_TYPE_READ; 4482 break; 4483 4484 default: 4485 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); 4486 retval = -EINVAL; 4487 goto out; 4488 } 4489 4490 timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); 4491 if (!timer) { 4492 retval = -ENOMEM; 4493 goto out; 4494 } 4495 4496 retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, 4497 NULL, &lock_flags, &fsf_req); 4498 if (retval < 0) { 4499 ZFCP_LOG_INFO("error: Could not create FSF request for the " 4500 "adapter %s\n", 4501 zfcp_get_busid_by_adapter(adapter)); 4502 retval = -EPERM; 4503 goto unlock_queue_lock; 4504 } 4505 4506 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4507 sbale[0].flags |= direction; 4508 4509 bottom = &fsf_req->qtcb->bottom.support; 4510 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; 4511 bottom->option = option; 4512 4513 if (sg_list->count > 0) { 4514 int bytes; 4515 4516 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, 4517 sg_list->sg, sg_list->count, 4518 ZFCP_MAX_SBALS_PER_REQ); 4519 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { 4520 ZFCP_LOG_INFO( 4521 "error: Could not create sufficient number of " 4522 "SBALS for an FSF request to the adapter %s\n", 4523 zfcp_get_busid_by_adapter(adapter)); 4524 retval = -ENOMEM; 4525 goto free_fsf_req; 4526 } 4527 } else 4528 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; 4529 4530 init_timer(timer); 4531 timer->function = zfcp_fsf_request_timeout_handler; 4532 timer->data = (unsigned long) adapter; 4533 timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; 4534 4535 retval = zfcp_fsf_req_send(fsf_req, timer); 4536 if (retval < 0) { 4537 ZFCP_LOG_INFO("initiation of cfdc up/download failed" 4538 "(adapter %s)\n", 4539 zfcp_get_busid_by_adapter(adapter)); 4540 retval = -EPERM; 4541 goto free_fsf_req; 4542 } 4543 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4544 4545 ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " 4546 "adapter %s\n", 4547 fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? 4548 "download" : "upload", 4549 zfcp_get_busid_by_adapter(adapter)); 4550 4551 wait_event(fsf_req->completion_wq, 4552 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4553 4554 *fsf_req_ptr = fsf_req; 4555 del_timer_sync(timer); 4556 goto free_timer; 4557 4558 free_fsf_req: 4559 zfcp_fsf_req_free(fsf_req); 4560 unlock_queue_lock: 4561 write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); 4562 free_timer: 4563 kfree(timer); 4564 out: 4565 return retval; 4566 } 4567 4568 4569 /* 4570 * function: zfcp_fsf_control_file_handler 4571 * 4572 * purpose: Handler of the control file upload/download FSF requests 4573 * 4574 * returns: 0 - FSF request successfuly processed 4575 * -EAGAIN - Operation has to be repeated because of a temporary problem 4576 * -EACCES - There is no permission to execute an operation 4577 * -EPERM - The control file is not in a right format 4578 * -EIO - There is a problem with the FCP adapter 4579 * -EINVAL - Invalid operation 4580 * -EFAULT - User space memory I/O operation fault 4581 */ 4582 static int 4583 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) 4584 { 4585 struct zfcp_adapter *adapter = fsf_req->adapter; 4586 struct fsf_qtcb_header *header = &fsf_req->qtcb->header; 4587 struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; 4588 int retval = 0; 4589 4590 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { 4591 retval = -EINVAL; 4592 goto skip_fsfstatus; 4593 } 4594 4595 switch (header->fsf_status) { 4596 4597 case FSF_GOOD: 4598 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n"); 4599 ZFCP_LOG_NORMAL( 4600 "The FSF request has been successfully completed " 4601 "on the adapter %s\n", 4602 zfcp_get_busid_by_adapter(adapter)); 4603 break; 4604 4605 case FSF_OPERATION_PARTIALLY_SUCCESSFUL: 4606 ZFCP_LOG_FLAGS(2, "FSF_OPERATION_PARTIALLY_SUCCESSFUL\n"); 4607 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { 4608 switch (header->fsf_status_qual.word[0]) { 4609 4610 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: 4611 ZFCP_LOG_NORMAL( 4612 "CFDC of the adapter %s could not " 4613 "be saved on the SE\n", 4614 zfcp_get_busid_by_adapter(adapter)); 4615 break; 4616 4617 case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: 4618 ZFCP_LOG_NORMAL( 4619 "CFDC of the adapter %s could not " 4620 "be copied to the secondary SE\n", 4621 zfcp_get_busid_by_adapter(adapter)); 4622 break; 4623 4624 default: 4625 ZFCP_LOG_NORMAL( 4626 "CFDC could not be hardened " 4627 "on the adapter %s\n", 4628 zfcp_get_busid_by_adapter(adapter)); 4629 } 4630 } 4631 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4632 retval = -EAGAIN; 4633 break; 4634 4635 case FSF_AUTHORIZATION_FAILURE: 4636 ZFCP_LOG_FLAGS(2, "FSF_AUTHORIZATION_FAILURE\n"); 4637 ZFCP_LOG_NORMAL( 4638 "Adapter %s does not accept privileged commands\n", 4639 zfcp_get_busid_by_adapter(adapter)); 4640 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4641 retval = -EACCES; 4642 break; 4643 4644 case FSF_CFDC_ERROR_DETECTED: 4645 ZFCP_LOG_FLAGS(2, "FSF_CFDC_ERROR_DETECTED\n"); 4646 ZFCP_LOG_NORMAL( 4647 "Error at position %d in the CFDC, " 4648 "CFDC is discarded by the adapter %s\n", 4649 header->fsf_status_qual.word[0], 4650 zfcp_get_busid_by_adapter(adapter)); 4651 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4652 retval = -EPERM; 4653 break; 4654 4655 case FSF_CONTROL_FILE_UPDATE_ERROR: 4656 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_UPDATE_ERROR\n"); 4657 ZFCP_LOG_NORMAL( 4658 "Adapter %s cannot harden the control file, " 4659 "file is discarded\n", 4660 zfcp_get_busid_by_adapter(adapter)); 4661 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4662 retval = -EIO; 4663 break; 4664 4665 case FSF_CONTROL_FILE_TOO_LARGE: 4666 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_TOO_LARGE\n"); 4667 ZFCP_LOG_NORMAL( 4668 "Control file is too large, file is discarded " 4669 "by the adapter %s\n", 4670 zfcp_get_busid_by_adapter(adapter)); 4671 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4672 retval = -EIO; 4673 break; 4674 4675 case FSF_ACCESS_CONFLICT_DETECTED: 4676 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_CONFLICT_DETECTED\n"); 4677 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4678 ZFCP_LOG_NORMAL( 4679 "CFDC has been discarded by the adapter %s, " 4680 "because activation would impact " 4681 "%d active connection(s)\n", 4682 zfcp_get_busid_by_adapter(adapter), 4683 header->fsf_status_qual.word[0]); 4684 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4685 retval = -EIO; 4686 break; 4687 4688 case FSF_CONFLICTS_OVERRULED: 4689 ZFCP_LOG_FLAGS(2, "FSF_CONFLICTS_OVERRULED\n"); 4690 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) 4691 ZFCP_LOG_NORMAL( 4692 "CFDC has been activated on the adapter %s, " 4693 "but activation has impacted " 4694 "%d active connection(s)\n", 4695 zfcp_get_busid_by_adapter(adapter), 4696 header->fsf_status_qual.word[0]); 4697 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4698 retval = -EIO; 4699 break; 4700 4701 case FSF_UNKNOWN_OP_SUBTYPE: 4702 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n"); 4703 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " 4704 "op_subtype=0x%x)\n", 4705 zfcp_get_busid_by_adapter(adapter), 4706 bottom->operation_subtype); 4707 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4708 retval = -EINVAL; 4709 break; 4710 4711 case FSF_INVALID_COMMAND_OPTION: 4712 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n"); 4713 ZFCP_LOG_NORMAL( 4714 "Invalid option 0x%x has been specified " 4715 "in QTCB bottom sent to the adapter %s\n", 4716 bottom->option, 4717 zfcp_get_busid_by_adapter(adapter)); 4718 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4719 retval = -EINVAL; 4720 break; 4721 4722 default: 4723 ZFCP_LOG_NORMAL( 4724 "bug: An unknown/unexpected FSF status 0x%08x " 4725 "was presented on the adapter %s\n", 4726 header->fsf_status, 4727 zfcp_get_busid_by_adapter(adapter)); 4728 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); 4729 debug_exception(fsf_req->adapter->erp_dbf, 0, 4730 &header->fsf_status_qual.word[0], sizeof(u32)); 4731 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; 4732 retval = -EINVAL; 4733 break; 4734 } 4735 4736 skip_fsfstatus: 4737 return retval; 4738 } 4739 4740 4741 /* 4742 * function: zfcp_fsf_req_wait_and_cleanup 4743 * 4744 * purpose: 4745 * 4746 * FIXME(design): signal seems to be <0 !!! 4747 * returns: 0 - request completed (*status is valid), cleanup succ. 4748 * <0 - request completed (*status is valid), cleanup failed 4749 * >0 - signal which interrupted waiting (*status invalid), 4750 * request not completed, no cleanup 4751 * 4752 * *status is a copy of status of completed fsf_req 4753 */ 4754 int 4755 zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req, 4756 int interruptible, u32 * status) 4757 { 4758 int retval = 0; 4759 int signal = 0; 4760 4761 if (interruptible) { 4762 __wait_event_interruptible(fsf_req->completion_wq, 4763 fsf_req->status & 4764 ZFCP_STATUS_FSFREQ_COMPLETED, 4765 signal); 4766 if (signal) { 4767 ZFCP_LOG_DEBUG("Caught signal %i while waiting for the " 4768 "completion of the request at %p\n", 4769 signal, fsf_req); 4770 retval = signal; 4771 goto out; 4772 } 4773 } else { 4774 __wait_event(fsf_req->completion_wq, 4775 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 4776 } 4777 4778 *status = fsf_req->status; 4779 4780 /* cleanup request */ 4781 zfcp_fsf_req_cleanup(fsf_req); 4782 out: 4783 return retval; 4784 } 4785 4786 static inline int 4787 zfcp_fsf_req_sbal_check(unsigned long *flags, 4788 struct zfcp_qdio_queue *queue, int needed) 4789 { 4790 write_lock_irqsave(&queue->queue_lock, *flags); 4791 if (likely(atomic_read(&queue->free_count) >= needed)) 4792 return 1; 4793 write_unlock_irqrestore(&queue->queue_lock, *flags); 4794 return 0; 4795 } 4796 4797 /* 4798 * set qtcb pointer in fsf_req and initialize QTCB 4799 */ 4800 static inline void 4801 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd) 4802 { 4803 if (likely(fsf_req->qtcb != NULL)) { 4804 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req; 4805 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; 4806 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd]; 4807 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; 4808 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req; 4809 fsf_req->qtcb->header.fsf_command = fsf_cmd; 4810 } 4811 } 4812 4813 /** 4814 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue 4815 * @adapter: adapter for which request queue is examined 4816 * @req_flags: flags indicating whether to wait for needed SBAL or not 4817 * @lock_flags: lock_flags if queue_lock is taken 4818 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS 4819 * Locks: lock adapter->request_queue->queue_lock on success 4820 */ 4821 static int 4822 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, 4823 unsigned long *lock_flags) 4824 { 4825 long ret; 4826 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4827 4828 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { 4829 ret = wait_event_interruptible_timeout(adapter->request_wq, 4830 zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), 4831 ZFCP_SBAL_TIMEOUT); 4832 if (ret < 0) 4833 return ret; 4834 if (!ret) 4835 return -EIO; 4836 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) 4837 return -EIO; 4838 4839 return 0; 4840 } 4841 4842 /* 4843 * function: zfcp_fsf_req_create 4844 * 4845 * purpose: create an FSF request at the specified adapter and 4846 * setup common fields 4847 * 4848 * returns: -ENOMEM if there was insufficient memory for a request 4849 * -EIO if no qdio buffers could be allocate to the request 4850 * -EINVAL/-EPERM on bug conditions in req_dequeue 4851 * 0 in success 4852 * 4853 * note: The created request is returned by reference. 4854 * 4855 * locks: lock of concerned request queue must not be held, 4856 * but is held on completion (write, irqsave) 4857 */ 4858 int 4859 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, 4860 mempool_t *pool, unsigned long *lock_flags, 4861 struct zfcp_fsf_req **fsf_req_p) 4862 { 4863 volatile struct qdio_buffer_element *sbale; 4864 struct zfcp_fsf_req *fsf_req = NULL; 4865 int ret = 0; 4866 struct zfcp_qdio_queue *req_queue = &adapter->request_queue; 4867 4868 /* allocate new FSF request */ 4869 fsf_req = zfcp_fsf_req_alloc(pool, req_flags); 4870 if (unlikely(NULL == fsf_req)) { 4871 ZFCP_LOG_DEBUG("error: Could not put an FSF request into" 4872 "the outbound (send) queue.\n"); 4873 ret = -ENOMEM; 4874 goto failed_fsf_req; 4875 } 4876 4877 zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd); 4878 4879 /* initialize waitqueue which may be used to wait on 4880 this request completion */ 4881 init_waitqueue_head(&fsf_req->completion_wq); 4882 4883 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); 4884 if(ret < 0) { 4885 goto failed_sbals; 4886 } 4887 4888 /* 4889 * We hold queue_lock here. Check if QDIOUP is set and let request fail 4890 * if it is not set (see also *_open_qdio and *_close_qdio). 4891 */ 4892 4893 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { 4894 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); 4895 ret = -EIO; 4896 goto failed_sbals; 4897 } 4898 4899 fsf_req->adapter = adapter; /* pointer to "parent" adapter */ 4900 fsf_req->fsf_command = fsf_cmd; 4901 fsf_req->sbal_number = 1; 4902 fsf_req->sbal_first = req_queue->free_index; 4903 fsf_req->sbal_curr = req_queue->free_index; 4904 fsf_req->sbale_curr = 1; 4905 4906 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { 4907 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 4908 } 4909 4910 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); 4911 4912 /* setup common SBALE fields */ 4913 sbale[0].addr = fsf_req; 4914 sbale[0].flags |= SBAL_FLAGS0_COMMAND; 4915 if (likely(fsf_req->qtcb != NULL)) { 4916 sbale[1].addr = (void *) fsf_req->qtcb; 4917 sbale[1].length = sizeof(struct fsf_qtcb); 4918 } 4919 4920 ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", 4921 fsf_req->sbal_number, fsf_req->sbal_first); 4922 4923 goto success; 4924 4925 failed_sbals: 4926 /* dequeue new FSF request previously enqueued */ 4927 zfcp_fsf_req_free(fsf_req); 4928 fsf_req = NULL; 4929 4930 failed_fsf_req: 4931 write_lock_irqsave(&req_queue->queue_lock, *lock_flags); 4932 success: 4933 *fsf_req_p = fsf_req; 4934 return ret; 4935 } 4936 4937 /* 4938 * function: zfcp_fsf_req_send 4939 * 4940 * purpose: start transfer of FSF request via QDIO 4941 * 4942 * returns: 0 - request transfer succesfully started 4943 * !0 - start of request transfer failed 4944 */ 4945 static int 4946 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) 4947 { 4948 struct zfcp_adapter *adapter; 4949 struct zfcp_qdio_queue *req_queue; 4950 volatile struct qdio_buffer_element *sbale; 4951 int new_distance_from_int; 4952 unsigned long flags; 4953 int inc_seq_no = 1; 4954 int retval = 0; 4955 4956 adapter = fsf_req->adapter; 4957 req_queue = &adapter->request_queue, 4958 4959 4960 /* FIXME(debug): remove it later */ 4961 sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); 4962 ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); 4963 ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); 4964 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, 4965 sbale[1].length); 4966 4967 /* set sequence counter in QTCB */ 4968 if (likely(fsf_req->qtcb)) { 4969 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 4970 fsf_req->seq_no = adapter->fsf_req_seq_no; 4971 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets " 4972 "FSF sequence counter value of %i\n", 4973 fsf_req, 4974 zfcp_get_busid_by_adapter(adapter), 4975 fsf_req->qtcb->prefix.req_seq_no); 4976 } else 4977 inc_seq_no = 0; 4978 4979 /* put allocated FSF request at list tail */ 4980 write_lock_irqsave(&adapter->fsf_req_list_lock, flags); 4981 list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head); 4982 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 4983 4984 /* figure out expiration time of timeout and start timeout */ 4985 if (unlikely(timer)) { 4986 timer->expires += jiffies; 4987 add_timer(timer); 4988 } 4989 4990 ZFCP_LOG_TRACE("request queue of adapter %s: " 4991 "next free SBAL is %i, %i free SBALs\n", 4992 zfcp_get_busid_by_adapter(adapter), 4993 req_queue->free_index, 4994 atomic_read(&req_queue->free_count)); 4995 4996 ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " 4997 "index_in_queue=%i, count=%i, buffers=%p\n", 4998 zfcp_get_busid_by_adapter(adapter), 4999 QDIO_FLAG_SYNC_OUTPUT, 5000 0, fsf_req->sbal_first, fsf_req->sbal_number, 5001 &req_queue->buffer[fsf_req->sbal_first]); 5002 5003 /* 5004 * adjust the number of free SBALs in request queue as well as 5005 * position of first one 5006 */ 5007 atomic_sub(fsf_req->sbal_number, &req_queue->free_count); 5008 ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); 5009 req_queue->free_index += fsf_req->sbal_number; /* increase */ 5010 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ 5011 new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); 5012 5013 retval = do_QDIO(adapter->ccw_device, 5014 QDIO_FLAG_SYNC_OUTPUT, 5015 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); 5016 5017 if (unlikely(retval)) { 5018 /* Queues are down..... */ 5019 retval = -EIO; 5020 /* 5021 * FIXME(potential race): 5022 * timer might be expired (absolutely unlikely) 5023 */ 5024 if (timer) 5025 del_timer(timer); 5026 write_lock_irqsave(&adapter->fsf_req_list_lock, flags); 5027 list_del(&fsf_req->list); 5028 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 5029 /* 5030 * adjust the number of free SBALs in request queue as well as 5031 * position of first one 5032 */ 5033 zfcp_qdio_zero_sbals(req_queue->buffer, 5034 fsf_req->sbal_first, fsf_req->sbal_number); 5035 atomic_add(fsf_req->sbal_number, &req_queue->free_count); 5036 req_queue->free_index -= fsf_req->sbal_number; /* increase */ 5037 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; 5038 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ 5039 ZFCP_LOG_DEBUG 5040 ("error: do_QDIO failed. Buffers could not be enqueued " 5041 "to request queue.\n"); 5042 } else { 5043 req_queue->distance_from_int = new_distance_from_int; 5044 /* 5045 * increase FSF sequence counter - 5046 * this must only be done for request successfully enqueued to 5047 * QDIO this rejected requests may be cleaned up by calling 5048 * routines resulting in missing sequence counter values 5049 * otherwise, 5050 */ 5051 /* Don't increase for unsolicited status */ 5052 if (likely(inc_seq_no)) { 5053 adapter->fsf_req_seq_no++; 5054 ZFCP_LOG_TRACE 5055 ("FSF sequence counter value of adapter %s " 5056 "increased to %i\n", 5057 zfcp_get_busid_by_adapter(adapter), 5058 adapter->fsf_req_seq_no); 5059 } 5060 /* count FSF requests pending */ 5061 atomic_inc(&adapter->fsf_reqs_active); 5062 } 5063 return retval; 5064 } 5065 5066 /* 5067 * function: zfcp_fsf_req_cleanup 5068 * 5069 * purpose: cleans up an FSF request and removes it from the specified list 5070 * 5071 * returns: 5072 * 5073 * assumption: no pending SB in SBALEs other than QTCB 5074 */ 5075 void 5076 zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req) 5077 { 5078 struct zfcp_adapter *adapter = fsf_req->adapter; 5079 unsigned long flags; 5080 5081 write_lock_irqsave(&adapter->fsf_req_list_lock, flags); 5082 list_del(&fsf_req->list); 5083 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); 5084 zfcp_fsf_req_free(fsf_req); 5085 } 5086 5087 #undef ZFCP_LOG_AREA 5088