1 /* 2 * zfcp device driver 3 * 4 * Interface to Linux SCSI midlayer. 5 * 6 * Copyright IBM Corporation 2002, 2009 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include "zfcp_ext.h" 13 #include <asm/atomic.h> 14 15 /* Find start of Sense Information in FCP response unit*/ 16 char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) 17 { 18 char *fcp_sns_info_ptr; 19 20 fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1]; 21 if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) 22 fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len; 23 24 return fcp_sns_info_ptr; 25 } 26 27 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) 28 { 29 struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; 30 unit->device = NULL; 31 zfcp_unit_put(unit); 32 } 33 34 static int zfcp_scsi_slave_configure(struct scsi_device *sdp) 35 { 36 if (sdp->tagged_supported) 37 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32); 38 else 39 scsi_adjust_queue_depth(sdp, 0, 1); 40 return 0; 41 } 42 43 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) 44 { 45 set_host_byte(scpnt, result); 46 if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) 47 zfcp_scsi_dbf_event_result("fail", 4, 48 (struct zfcp_adapter*) scpnt->device->host->hostdata[0], 49 scpnt, NULL); 50 /* return directly */ 51 scpnt->scsi_done(scpnt); 52 } 53 54 static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, 55 void (*done) (struct scsi_cmnd *)) 56 { 57 struct zfcp_unit *unit; 58 struct zfcp_adapter *adapter; 59 int status, scsi_result, ret; 60 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); 61 62 /* reset the status for this request */ 63 scpnt->result = 0; 64 scpnt->host_scribble = NULL; 65 scpnt->scsi_done = done; 66 67 /* 68 * figure out adapter and target device 69 * (stored there by zfcp_scsi_slave_alloc) 70 */ 71 adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; 72 unit = scpnt->device->hostdata; 73 74 BUG_ON(!adapter || (adapter != unit->port->adapter)); 75 BUG_ON(!scpnt->scsi_done); 76 77 if (unlikely(!unit)) { 78 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); 79 return 0; 80 } 81 82 scsi_result = fc_remote_port_chkready(rport); 83 if (unlikely(scsi_result)) { 84 scpnt->result = scsi_result; 85 zfcp_scsi_dbf_event_result("fail", 4, adapter, scpnt, NULL); 86 scpnt->scsi_done(scpnt); 87 return 0; 88 } 89 90 status = atomic_read(&unit->status); 91 if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || 92 !(status & ZFCP_STATUS_COMMON_RUNNING))) { 93 zfcp_scsi_command_fail(scpnt, DID_ERROR); 94 return 0;; 95 } 96 97 ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); 98 if (unlikely(ret == -EBUSY)) 99 return SCSI_MLQUEUE_DEVICE_BUSY; 100 else if (unlikely(ret < 0)) 101 return SCSI_MLQUEUE_HOST_BUSY; 102 103 return ret; 104 } 105 106 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, 107 int channel, unsigned int id, 108 unsigned int lun) 109 { 110 struct zfcp_port *port; 111 struct zfcp_unit *unit; 112 int scsi_lun; 113 114 list_for_each_entry(port, &adapter->port_list_head, list) { 115 if (!port->rport || (id != port->rport->scsi_target_id)) 116 continue; 117 list_for_each_entry(unit, &port->unit_list_head, list) { 118 scsi_lun = scsilun_to_int( 119 (struct scsi_lun *)&unit->fcp_lun); 120 if (lun == scsi_lun) 121 return unit; 122 } 123 } 124 125 return NULL; 126 } 127 128 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) 129 { 130 struct zfcp_adapter *adapter; 131 struct zfcp_unit *unit; 132 unsigned long flags; 133 int retval = -ENXIO; 134 135 adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; 136 if (!adapter) 137 goto out; 138 139 read_lock_irqsave(&zfcp_data.config_lock, flags); 140 unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); 141 if (unit) { 142 sdp->hostdata = unit; 143 unit->device = sdp; 144 zfcp_unit_get(unit); 145 retval = 0; 146 } 147 read_unlock_irqrestore(&zfcp_data.config_lock, flags); 148 out: 149 return retval; 150 } 151 152 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 153 { 154 struct Scsi_Host *scsi_host = scpnt->device->host; 155 struct zfcp_adapter *adapter = 156 (struct zfcp_adapter *) scsi_host->hostdata[0]; 157 struct zfcp_unit *unit = scpnt->device->hostdata; 158 struct zfcp_fsf_req *old_req, *abrt_req; 159 unsigned long flags; 160 unsigned long old_req_id = (unsigned long) scpnt->host_scribble; 161 int retval = SUCCESS; 162 int retry = 3; 163 164 /* avoid race condition between late normal completion and abort */ 165 write_lock_irqsave(&adapter->abort_lock, flags); 166 167 spin_lock(&adapter->req_list_lock); 168 old_req = zfcp_reqlist_find(adapter, old_req_id); 169 spin_unlock(&adapter->req_list_lock); 170 if (!old_req) { 171 write_unlock_irqrestore(&adapter->abort_lock, flags); 172 zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 173 old_req_id); 174 return FAILED; /* completion could be in progress */ 175 } 176 old_req->data = NULL; 177 178 /* don't access old fsf_req after releasing the abort_lock */ 179 write_unlock_irqrestore(&adapter->abort_lock, flags); 180 181 while (retry--) { 182 abrt_req = zfcp_fsf_abort_fcp_command(old_req_id, unit); 183 if (abrt_req) 184 break; 185 186 zfcp_erp_wait(adapter); 187 if (!(atomic_read(&adapter->status) & 188 ZFCP_STATUS_COMMON_RUNNING)) { 189 zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, 190 old_req_id); 191 return SUCCESS; 192 } 193 } 194 if (!abrt_req) 195 return FAILED; 196 197 wait_event(abrt_req->completion_wq, 198 abrt_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 199 200 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) 201 zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, abrt_req, 0); 202 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) 203 zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, abrt_req, 0); 204 else { 205 zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, abrt_req, 0); 206 retval = FAILED; 207 } 208 zfcp_fsf_req_free(abrt_req); 209 return retval; 210 } 211 212 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) 213 { 214 struct zfcp_unit *unit = scpnt->device->hostdata; 215 struct zfcp_adapter *adapter = unit->port->adapter; 216 struct zfcp_fsf_req *fsf_req; 217 int retval = SUCCESS; 218 int retry = 3; 219 220 while (retry--) { 221 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); 222 if (fsf_req) 223 break; 224 225 zfcp_erp_wait(adapter); 226 if (!(atomic_read(&adapter->status) & 227 ZFCP_STATUS_COMMON_RUNNING)) { 228 zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, 229 scpnt); 230 return SUCCESS; 231 } 232 } 233 if (!fsf_req) 234 return FAILED; 235 236 wait_event(fsf_req->completion_wq, 237 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); 238 239 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 240 zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); 241 retval = FAILED; 242 } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { 243 zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); 244 retval = FAILED; 245 } else 246 zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); 247 248 zfcp_fsf_req_free(fsf_req); 249 return retval; 250 } 251 252 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) 253 { 254 return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET); 255 } 256 257 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) 258 { 259 return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET); 260 } 261 262 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 263 { 264 struct zfcp_unit *unit = scpnt->device->hostdata; 265 struct zfcp_adapter *adapter = unit->port->adapter; 266 267 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); 268 zfcp_erp_wait(adapter); 269 270 return SUCCESS; 271 } 272 273 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) 274 { 275 struct ccw_dev_id dev_id; 276 277 if (adapter->scsi_host) 278 return 0; 279 280 ccw_device_get_id(adapter->ccw_device, &dev_id); 281 /* register adapter as SCSI host with mid layer of SCSI stack */ 282 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, 283 sizeof (struct zfcp_adapter *)); 284 if (!adapter->scsi_host) { 285 dev_err(&adapter->ccw_device->dev, 286 "Registering the FCP device with the " 287 "SCSI stack failed\n"); 288 return -EIO; 289 } 290 291 /* tell the SCSI stack some characteristics of this adapter */ 292 adapter->scsi_host->max_id = 1; 293 adapter->scsi_host->max_lun = 1; 294 adapter->scsi_host->max_channel = 0; 295 adapter->scsi_host->unique_id = dev_id.devno; 296 adapter->scsi_host->max_cmd_len = 255; 297 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; 298 299 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 300 301 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 302 scsi_host_put(adapter->scsi_host); 303 return -EIO; 304 } 305 306 return 0; 307 } 308 309 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) 310 { 311 struct Scsi_Host *shost; 312 struct zfcp_port *port; 313 314 shost = adapter->scsi_host; 315 if (!shost) 316 return; 317 318 read_lock_irq(&zfcp_data.config_lock); 319 list_for_each_entry(port, &adapter->port_list_head, list) 320 if (port->rport) 321 port->rport = NULL; 322 323 read_unlock_irq(&zfcp_data.config_lock); 324 fc_remove_host(shost); 325 scsi_remove_host(shost); 326 scsi_host_put(shost); 327 adapter->scsi_host = NULL; 328 329 return; 330 } 331 332 static struct fc_host_statistics* 333 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 334 { 335 struct fc_host_statistics *fc_stats; 336 337 if (!adapter->fc_stats) { 338 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); 339 if (!fc_stats) 340 return NULL; 341 adapter->fc_stats = fc_stats; /* freed in adater_dequeue */ 342 } 343 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); 344 return adapter->fc_stats; 345 } 346 347 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 348 struct fsf_qtcb_bottom_port *data, 349 struct fsf_qtcb_bottom_port *old) 350 { 351 fc_stats->seconds_since_last_reset = 352 data->seconds_since_last_reset - old->seconds_since_last_reset; 353 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 354 fc_stats->tx_words = data->tx_words - old->tx_words; 355 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 356 fc_stats->rx_words = data->rx_words - old->rx_words; 357 fc_stats->lip_count = data->lip - old->lip; 358 fc_stats->nos_count = data->nos - old->nos; 359 fc_stats->error_frames = data->error_frames - old->error_frames; 360 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 361 fc_stats->link_failure_count = data->link_failure - old->link_failure; 362 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 363 fc_stats->loss_of_signal_count = 364 data->loss_of_signal - old->loss_of_signal; 365 fc_stats->prim_seq_protocol_err_count = 366 data->psp_error_counts - old->psp_error_counts; 367 fc_stats->invalid_tx_word_count = 368 data->invalid_tx_words - old->invalid_tx_words; 369 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 370 fc_stats->fcp_input_requests = 371 data->input_requests - old->input_requests; 372 fc_stats->fcp_output_requests = 373 data->output_requests - old->output_requests; 374 fc_stats->fcp_control_requests = 375 data->control_requests - old->control_requests; 376 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 377 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 378 } 379 380 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 381 struct fsf_qtcb_bottom_port *data) 382 { 383 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 384 fc_stats->tx_frames = data->tx_frames; 385 fc_stats->tx_words = data->tx_words; 386 fc_stats->rx_frames = data->rx_frames; 387 fc_stats->rx_words = data->rx_words; 388 fc_stats->lip_count = data->lip; 389 fc_stats->nos_count = data->nos; 390 fc_stats->error_frames = data->error_frames; 391 fc_stats->dumped_frames = data->dumped_frames; 392 fc_stats->link_failure_count = data->link_failure; 393 fc_stats->loss_of_sync_count = data->loss_of_sync; 394 fc_stats->loss_of_signal_count = data->loss_of_signal; 395 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; 396 fc_stats->invalid_tx_word_count = data->invalid_tx_words; 397 fc_stats->invalid_crc_count = data->invalid_crcs; 398 fc_stats->fcp_input_requests = data->input_requests; 399 fc_stats->fcp_output_requests = data->output_requests; 400 fc_stats->fcp_control_requests = data->control_requests; 401 fc_stats->fcp_input_megabytes = data->input_mb; 402 fc_stats->fcp_output_megabytes = data->output_mb; 403 } 404 405 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) 406 { 407 struct zfcp_adapter *adapter; 408 struct fc_host_statistics *fc_stats; 409 struct fsf_qtcb_bottom_port *data; 410 int ret; 411 412 adapter = (struct zfcp_adapter *)host->hostdata[0]; 413 fc_stats = zfcp_init_fc_host_stats(adapter); 414 if (!fc_stats) 415 return NULL; 416 417 data = kzalloc(sizeof(*data), GFP_KERNEL); 418 if (!data) 419 return NULL; 420 421 ret = zfcp_fsf_exchange_port_data_sync(adapter, data); 422 if (ret) { 423 kfree(data); 424 return NULL; 425 } 426 427 if (adapter->stats_reset && 428 ((jiffies/HZ - adapter->stats_reset) < 429 data->seconds_since_last_reset)) 430 zfcp_adjust_fc_host_stats(fc_stats, data, 431 adapter->stats_reset_data); 432 else 433 zfcp_set_fc_host_stats(fc_stats, data); 434 435 kfree(data); 436 return fc_stats; 437 } 438 439 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 440 { 441 struct zfcp_adapter *adapter; 442 struct fsf_qtcb_bottom_port *data; 443 int ret; 444 445 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 446 data = kzalloc(sizeof(*data), GFP_KERNEL); 447 if (!data) 448 return; 449 450 ret = zfcp_fsf_exchange_port_data_sync(adapter, data); 451 if (ret) 452 kfree(data); 453 else { 454 adapter->stats_reset = jiffies/HZ; 455 kfree(adapter->stats_reset_data); 456 adapter->stats_reset_data = data; /* finally freed in 457 adapter_dequeue */ 458 } 459 } 460 461 static void zfcp_get_host_port_state(struct Scsi_Host *shost) 462 { 463 struct zfcp_adapter *adapter = 464 (struct zfcp_adapter *)shost->hostdata[0]; 465 int status = atomic_read(&adapter->status); 466 467 if ((status & ZFCP_STATUS_COMMON_RUNNING) && 468 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) 469 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 470 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 471 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 472 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) 473 fc_host_port_state(shost) = FC_PORTSTATE_ERROR; 474 else 475 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 476 } 477 478 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 479 { 480 rport->dev_loss_tmo = timeout; 481 } 482 483 /** 484 * zfcp_scsi_dev_loss_tmo_callbk - Free any reference to rport 485 * @rport: The rport that is about to be deleted. 486 */ 487 static void zfcp_scsi_dev_loss_tmo_callbk(struct fc_rport *rport) 488 { 489 struct zfcp_port *port; 490 491 write_lock_irq(&zfcp_data.config_lock); 492 port = rport->dd_data; 493 if (port) 494 port->rport = NULL; 495 write_unlock_irq(&zfcp_data.config_lock); 496 } 497 498 /** 499 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport 500 * @rport: The FC rport where to teminate I/O 501 * 502 * Abort all pending SCSI commands for a port by closing the 503 * port. Using a reopen for avoids a conflict with a shutdown 504 * overwriting a reopen. 505 */ 506 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) 507 { 508 struct zfcp_port *port; 509 510 write_lock_irq(&zfcp_data.config_lock); 511 port = rport->dd_data; 512 if (port) 513 zfcp_port_get(port); 514 write_unlock_irq(&zfcp_data.config_lock); 515 516 if (port) { 517 zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL); 518 zfcp_port_put(port); 519 } 520 } 521 522 static void zfcp_scsi_rport_register(struct zfcp_port *port) 523 { 524 struct fc_rport_identifiers ids; 525 struct fc_rport *rport; 526 527 ids.node_name = port->wwnn; 528 ids.port_name = port->wwpn; 529 ids.port_id = port->d_id; 530 ids.roles = FC_RPORT_ROLE_FCP_TARGET; 531 532 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); 533 if (!rport) { 534 dev_err(&port->adapter->ccw_device->dev, 535 "Registering port 0x%016Lx failed\n", 536 (unsigned long long)port->wwpn); 537 return; 538 } 539 540 rport->dd_data = port; 541 rport->maxframe_size = port->maxframe_size; 542 rport->supported_classes = port->supported_classes; 543 port->rport = rport; 544 } 545 546 static void zfcp_scsi_rport_block(struct zfcp_port *port) 547 { 548 struct fc_rport *rport = port->rport; 549 550 if (rport) 551 fc_remote_port_delete(rport); 552 } 553 554 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) 555 { 556 zfcp_port_get(port); 557 port->rport_task = RPORT_ADD; 558 559 if (!queue_work(zfcp_data.work_queue, &port->rport_work)) 560 zfcp_port_put(port); 561 } 562 563 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) 564 { 565 zfcp_port_get(port); 566 port->rport_task = RPORT_DEL; 567 568 if (!queue_work(zfcp_data.work_queue, &port->rport_work)) 569 zfcp_port_put(port); 570 } 571 572 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) 573 { 574 struct zfcp_port *port; 575 576 list_for_each_entry(port, &adapter->port_list_head, list) 577 zfcp_scsi_schedule_rport_block(port); 578 } 579 580 void zfcp_scsi_rport_work(struct work_struct *work) 581 { 582 struct zfcp_port *port = container_of(work, struct zfcp_port, 583 rport_work); 584 585 while (port->rport_task) { 586 if (port->rport_task == RPORT_ADD) { 587 port->rport_task = RPORT_NONE; 588 zfcp_scsi_rport_register(port); 589 } else { 590 port->rport_task = RPORT_NONE; 591 zfcp_scsi_rport_block(port); 592 } 593 } 594 595 zfcp_port_put(port); 596 } 597 598 599 void zfcp_scsi_scan(struct work_struct *work) 600 { 601 struct zfcp_unit *unit = container_of(work, struct zfcp_unit, 602 scsi_work); 603 struct fc_rport *rport; 604 605 flush_work(&unit->port->rport_work); 606 rport = unit->port->rport; 607 608 if (rport && rport->port_state == FC_PORTSTATE_ONLINE) 609 scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, 610 scsilun_to_int((struct scsi_lun *) 611 &unit->fcp_lun), 0); 612 613 zfcp_unit_put(unit); 614 } 615 616 struct fc_function_template zfcp_transport_functions = { 617 .show_starget_port_id = 1, 618 .show_starget_port_name = 1, 619 .show_starget_node_name = 1, 620 .show_rport_supported_classes = 1, 621 .show_rport_maxframe_size = 1, 622 .show_rport_dev_loss_tmo = 1, 623 .show_host_node_name = 1, 624 .show_host_port_name = 1, 625 .show_host_permanent_port_name = 1, 626 .show_host_supported_classes = 1, 627 .show_host_supported_speeds = 1, 628 .show_host_maxframe_size = 1, 629 .show_host_serial_number = 1, 630 .get_fc_host_stats = zfcp_get_fc_host_stats, 631 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 632 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 633 .get_host_port_state = zfcp_get_host_port_state, 634 .dev_loss_tmo_callbk = zfcp_scsi_dev_loss_tmo_callbk, 635 .terminate_rport_io = zfcp_scsi_terminate_rport_io, 636 .show_host_port_state = 1, 637 /* no functions registered for following dynamic attributes but 638 directly set by LLDD */ 639 .show_host_port_type = 1, 640 .show_host_speed = 1, 641 .show_host_port_id = 1, 642 .disable_target_scan = 1, 643 }; 644 645 struct zfcp_data zfcp_data = { 646 .scsi_host_template = { 647 .name = "zfcp", 648 .module = THIS_MODULE, 649 .proc_name = "zfcp", 650 .slave_alloc = zfcp_scsi_slave_alloc, 651 .slave_configure = zfcp_scsi_slave_configure, 652 .slave_destroy = zfcp_scsi_slave_destroy, 653 .queuecommand = zfcp_scsi_queuecommand, 654 .eh_abort_handler = zfcp_scsi_eh_abort_handler, 655 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, 656 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, 657 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, 658 .can_queue = 4096, 659 .this_id = -1, 660 .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, 661 .cmd_per_lun = 1, 662 .use_clustering = 1, 663 .sdev_attrs = zfcp_sysfs_sdev_attrs, 664 .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), 665 .shost_attrs = zfcp_sysfs_shost_attrs, 666 }, 667 }; 668