1 /* 2 * zfcp device driver 3 * 4 * Interface to Linux SCSI midlayer. 5 * 6 * Copyright IBM Corporation 2002, 2010 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/types.h> 13 #include <linux/slab.h> 14 #include <scsi/fc/fc_fcp.h> 15 #include <scsi/scsi_eh.h> 16 #include <asm/atomic.h> 17 #include "zfcp_ext.h" 18 #include "zfcp_dbf.h" 19 #include "zfcp_fc.h" 20 #include "zfcp_reqlist.h" 21 22 static unsigned int default_depth = 32; 23 module_param_named(queue_depth, default_depth, uint, 0600); 24 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); 25 26 static bool enable_dif; 27 28 #ifdef CONFIG_ZFCP_DIF 29 module_param_named(dif, enable_dif, bool, 0600); 30 MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); 31 #endif 32 33 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, 34 int reason) 35 { 36 switch (reason) { 37 case SCSI_QDEPTH_DEFAULT: 38 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 39 break; 40 case SCSI_QDEPTH_QFULL: 41 scsi_track_queue_full(sdev, depth); 42 break; 43 case SCSI_QDEPTH_RAMP_UP: 44 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 45 break; 46 default: 47 return -EOPNOTSUPP; 48 } 49 return sdev->queue_depth; 50 } 51 52 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) 53 { 54 struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; 55 unit->device = NULL; 56 put_device(&unit->dev); 57 } 58 59 static int zfcp_scsi_slave_configure(struct scsi_device *sdp) 60 { 61 if (sdp->tagged_supported) 62 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); 63 else 64 scsi_adjust_queue_depth(sdp, 0, 1); 65 return 0; 66 } 67 68 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) 69 { 70 struct zfcp_adapter *adapter = 71 (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; 72 73 set_host_byte(scpnt, result); 74 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); 75 scpnt->scsi_done(scpnt); 76 } 77 78 static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, 79 void (*done) (struct scsi_cmnd *)) 80 { 81 struct zfcp_unit *unit; 82 struct zfcp_adapter *adapter; 83 int status, scsi_result, ret; 84 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); 85 86 /* reset the status for this request */ 87 scpnt->result = 0; 88 scpnt->host_scribble = NULL; 89 scpnt->scsi_done = done; 90 91 /* 92 * figure out adapter and target device 93 * (stored there by zfcp_scsi_slave_alloc) 94 */ 95 adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; 96 unit = scpnt->device->hostdata; 97 98 scsi_result = fc_remote_port_chkready(rport); 99 if (unlikely(scsi_result)) { 100 scpnt->result = scsi_result; 101 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); 102 scpnt->scsi_done(scpnt); 103 return 0; 104 } 105 106 status = atomic_read(&unit->status); 107 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && 108 !(atomic_read(&unit->port->status) & 109 ZFCP_STATUS_COMMON_ERP_FAILED)) { 110 /* only unit access denied, but port is good 111 * not covered by FC transport, have to fail here */ 112 zfcp_scsi_command_fail(scpnt, DID_ERROR); 113 return 0; 114 } 115 116 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { 117 /* This could be either 118 * open unit pending: this is temporary, will result in 119 * open unit or ERP_FAILED, so retry command 120 * call to rport_delete pending: mimic retry from 121 * fc_remote_port_chkready until rport is BLOCKED 122 */ 123 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); 124 return 0; 125 } 126 127 ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); 128 if (unlikely(ret == -EBUSY)) 129 return SCSI_MLQUEUE_DEVICE_BUSY; 130 else if (unlikely(ret < 0)) 131 return SCSI_MLQUEUE_HOST_BUSY; 132 133 return ret; 134 } 135 136 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, 137 unsigned int id, u64 lun) 138 { 139 unsigned long flags; 140 struct zfcp_port *port; 141 struct zfcp_unit *unit = NULL; 142 143 read_lock_irqsave(&adapter->port_list_lock, flags); 144 list_for_each_entry(port, &adapter->port_list, list) { 145 if (!port->rport || (id != port->rport->scsi_target_id)) 146 continue; 147 unit = zfcp_get_unit_by_lun(port, lun); 148 if (unit) 149 break; 150 } 151 read_unlock_irqrestore(&adapter->port_list_lock, flags); 152 153 return unit; 154 } 155 156 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) 157 { 158 struct zfcp_adapter *adapter; 159 struct zfcp_unit *unit; 160 u64 lun; 161 162 adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; 163 if (!adapter) 164 goto out; 165 166 int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun); 167 unit = zfcp_unit_lookup(adapter, sdp->id, lun); 168 if (unit) { 169 sdp->hostdata = unit; 170 unit->device = sdp; 171 return 0; 172 } 173 out: 174 return -ENXIO; 175 } 176 177 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 178 { 179 struct Scsi_Host *scsi_host = scpnt->device->host; 180 struct zfcp_adapter *adapter = 181 (struct zfcp_adapter *) scsi_host->hostdata[0]; 182 struct zfcp_unit *unit = scpnt->device->hostdata; 183 struct zfcp_fsf_req *old_req, *abrt_req; 184 unsigned long flags; 185 unsigned long old_reqid = (unsigned long) scpnt->host_scribble; 186 int retval = SUCCESS, ret; 187 int retry = 3; 188 char *dbf_tag; 189 190 /* avoid race condition between late normal completion and abort */ 191 write_lock_irqsave(&adapter->abort_lock, flags); 192 193 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); 194 if (!old_req) { 195 write_unlock_irqrestore(&adapter->abort_lock, flags); 196 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL, 197 old_reqid); 198 return FAILED; /* completion could be in progress */ 199 } 200 old_req->data = NULL; 201 202 /* don't access old fsf_req after releasing the abort_lock */ 203 write_unlock_irqrestore(&adapter->abort_lock, flags); 204 205 while (retry--) { 206 abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit); 207 if (abrt_req) 208 break; 209 210 zfcp_erp_wait(adapter); 211 ret = fc_block_scsi_eh(scpnt); 212 if (ret) 213 return ret; 214 if (!(atomic_read(&adapter->status) & 215 ZFCP_STATUS_COMMON_RUNNING)) { 216 zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, 217 old_reqid); 218 return SUCCESS; 219 } 220 } 221 if (!abrt_req) 222 return FAILED; 223 224 wait_for_completion(&abrt_req->completion); 225 226 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) 227 dbf_tag = "okay"; 228 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) 229 dbf_tag = "lte2"; 230 else { 231 dbf_tag = "fail"; 232 retval = FAILED; 233 } 234 zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); 235 zfcp_fsf_req_free(abrt_req); 236 return retval; 237 } 238 239 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) 240 { 241 struct zfcp_unit *unit = scpnt->device->hostdata; 242 struct zfcp_adapter *adapter = unit->port->adapter; 243 struct zfcp_fsf_req *fsf_req = NULL; 244 int retval = SUCCESS, ret; 245 int retry = 3; 246 247 while (retry--) { 248 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); 249 if (fsf_req) 250 break; 251 252 zfcp_erp_wait(adapter); 253 ret = fc_block_scsi_eh(scpnt); 254 if (ret) 255 return ret; 256 257 if (!(atomic_read(&adapter->status) & 258 ZFCP_STATUS_COMMON_RUNNING)) { 259 zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt); 260 return SUCCESS; 261 } 262 } 263 if (!fsf_req) 264 return FAILED; 265 266 wait_for_completion(&fsf_req->completion); 267 268 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 269 zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt); 270 retval = FAILED; 271 } else 272 zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt); 273 274 zfcp_fsf_req_free(fsf_req); 275 return retval; 276 } 277 278 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) 279 { 280 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); 281 } 282 283 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) 284 { 285 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); 286 } 287 288 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 289 { 290 struct zfcp_unit *unit = scpnt->device->hostdata; 291 struct zfcp_adapter *adapter = unit->port->adapter; 292 int ret; 293 294 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); 295 zfcp_erp_wait(adapter); 296 ret = fc_block_scsi_eh(scpnt); 297 if (ret) 298 return ret; 299 300 return SUCCESS; 301 } 302 303 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) 304 { 305 struct ccw_dev_id dev_id; 306 307 if (adapter->scsi_host) 308 return 0; 309 310 ccw_device_get_id(adapter->ccw_device, &dev_id); 311 /* register adapter as SCSI host with mid layer of SCSI stack */ 312 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, 313 sizeof (struct zfcp_adapter *)); 314 if (!adapter->scsi_host) { 315 dev_err(&adapter->ccw_device->dev, 316 "Registering the FCP device with the " 317 "SCSI stack failed\n"); 318 return -EIO; 319 } 320 321 /* tell the SCSI stack some characteristics of this adapter */ 322 adapter->scsi_host->max_id = 1; 323 adapter->scsi_host->max_lun = 1; 324 adapter->scsi_host->max_channel = 0; 325 adapter->scsi_host->unique_id = dev_id.devno; 326 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ 327 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; 328 329 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 330 331 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 332 scsi_host_put(adapter->scsi_host); 333 return -EIO; 334 } 335 336 return 0; 337 } 338 339 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) 340 { 341 struct Scsi_Host *shost; 342 struct zfcp_port *port; 343 344 shost = adapter->scsi_host; 345 if (!shost) 346 return; 347 348 read_lock_irq(&adapter->port_list_lock); 349 list_for_each_entry(port, &adapter->port_list, list) 350 port->rport = NULL; 351 read_unlock_irq(&adapter->port_list_lock); 352 353 fc_remove_host(shost); 354 scsi_remove_host(shost); 355 scsi_host_put(shost); 356 adapter->scsi_host = NULL; 357 358 return; 359 } 360 361 static struct fc_host_statistics* 362 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 363 { 364 struct fc_host_statistics *fc_stats; 365 366 if (!adapter->fc_stats) { 367 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); 368 if (!fc_stats) 369 return NULL; 370 adapter->fc_stats = fc_stats; /* freed in adapter_release */ 371 } 372 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); 373 return adapter->fc_stats; 374 } 375 376 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 377 struct fsf_qtcb_bottom_port *data, 378 struct fsf_qtcb_bottom_port *old) 379 { 380 fc_stats->seconds_since_last_reset = 381 data->seconds_since_last_reset - old->seconds_since_last_reset; 382 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 383 fc_stats->tx_words = data->tx_words - old->tx_words; 384 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 385 fc_stats->rx_words = data->rx_words - old->rx_words; 386 fc_stats->lip_count = data->lip - old->lip; 387 fc_stats->nos_count = data->nos - old->nos; 388 fc_stats->error_frames = data->error_frames - old->error_frames; 389 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 390 fc_stats->link_failure_count = data->link_failure - old->link_failure; 391 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 392 fc_stats->loss_of_signal_count = 393 data->loss_of_signal - old->loss_of_signal; 394 fc_stats->prim_seq_protocol_err_count = 395 data->psp_error_counts - old->psp_error_counts; 396 fc_stats->invalid_tx_word_count = 397 data->invalid_tx_words - old->invalid_tx_words; 398 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 399 fc_stats->fcp_input_requests = 400 data->input_requests - old->input_requests; 401 fc_stats->fcp_output_requests = 402 data->output_requests - old->output_requests; 403 fc_stats->fcp_control_requests = 404 data->control_requests - old->control_requests; 405 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 406 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 407 } 408 409 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 410 struct fsf_qtcb_bottom_port *data) 411 { 412 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 413 fc_stats->tx_frames = data->tx_frames; 414 fc_stats->tx_words = data->tx_words; 415 fc_stats->rx_frames = data->rx_frames; 416 fc_stats->rx_words = data->rx_words; 417 fc_stats->lip_count = data->lip; 418 fc_stats->nos_count = data->nos; 419 fc_stats->error_frames = data->error_frames; 420 fc_stats->dumped_frames = data->dumped_frames; 421 fc_stats->link_failure_count = data->link_failure; 422 fc_stats->loss_of_sync_count = data->loss_of_sync; 423 fc_stats->loss_of_signal_count = data->loss_of_signal; 424 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; 425 fc_stats->invalid_tx_word_count = data->invalid_tx_words; 426 fc_stats->invalid_crc_count = data->invalid_crcs; 427 fc_stats->fcp_input_requests = data->input_requests; 428 fc_stats->fcp_output_requests = data->output_requests; 429 fc_stats->fcp_control_requests = data->control_requests; 430 fc_stats->fcp_input_megabytes = data->input_mb; 431 fc_stats->fcp_output_megabytes = data->output_mb; 432 } 433 434 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) 435 { 436 struct zfcp_adapter *adapter; 437 struct fc_host_statistics *fc_stats; 438 struct fsf_qtcb_bottom_port *data; 439 int ret; 440 441 adapter = (struct zfcp_adapter *)host->hostdata[0]; 442 fc_stats = zfcp_init_fc_host_stats(adapter); 443 if (!fc_stats) 444 return NULL; 445 446 data = kzalloc(sizeof(*data), GFP_KERNEL); 447 if (!data) 448 return NULL; 449 450 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 451 if (ret) { 452 kfree(data); 453 return NULL; 454 } 455 456 if (adapter->stats_reset && 457 ((jiffies/HZ - adapter->stats_reset) < 458 data->seconds_since_last_reset)) 459 zfcp_adjust_fc_host_stats(fc_stats, data, 460 adapter->stats_reset_data); 461 else 462 zfcp_set_fc_host_stats(fc_stats, data); 463 464 kfree(data); 465 return fc_stats; 466 } 467 468 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 469 { 470 struct zfcp_adapter *adapter; 471 struct fsf_qtcb_bottom_port *data; 472 int ret; 473 474 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 475 data = kzalloc(sizeof(*data), GFP_KERNEL); 476 if (!data) 477 return; 478 479 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 480 if (ret) 481 kfree(data); 482 else { 483 adapter->stats_reset = jiffies/HZ; 484 kfree(adapter->stats_reset_data); 485 adapter->stats_reset_data = data; /* finally freed in 486 adapter_release */ 487 } 488 } 489 490 static void zfcp_get_host_port_state(struct Scsi_Host *shost) 491 { 492 struct zfcp_adapter *adapter = 493 (struct zfcp_adapter *)shost->hostdata[0]; 494 int status = atomic_read(&adapter->status); 495 496 if ((status & ZFCP_STATUS_COMMON_RUNNING) && 497 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) 498 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 499 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 500 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 501 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) 502 fc_host_port_state(shost) = FC_PORTSTATE_ERROR; 503 else 504 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 505 } 506 507 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 508 { 509 rport->dev_loss_tmo = timeout; 510 } 511 512 /** 513 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport 514 * @rport: The FC rport where to teminate I/O 515 * 516 * Abort all pending SCSI commands for a port by closing the 517 * port. Using a reopen avoids a conflict with a shutdown 518 * overwriting a reopen. The "forced" ensures that a disappeared port 519 * is not opened again as valid due to the cached plogi data in 520 * non-NPIV mode. 521 */ 522 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) 523 { 524 struct zfcp_port *port; 525 struct Scsi_Host *shost = rport_to_shost(rport); 526 struct zfcp_adapter *adapter = 527 (struct zfcp_adapter *)shost->hostdata[0]; 528 529 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 530 531 if (port) { 532 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1", NULL); 533 put_device(&port->dev); 534 } 535 } 536 537 static void zfcp_scsi_queue_unit_register(struct zfcp_port *port) 538 { 539 struct zfcp_unit *unit; 540 541 read_lock_irq(&port->unit_list_lock); 542 list_for_each_entry(unit, &port->unit_list, list) { 543 get_device(&unit->dev); 544 if (scsi_queue_work(port->adapter->scsi_host, 545 &unit->scsi_work) <= 0) 546 put_device(&unit->dev); 547 } 548 read_unlock_irq(&port->unit_list_lock); 549 } 550 551 static void zfcp_scsi_rport_register(struct zfcp_port *port) 552 { 553 struct fc_rport_identifiers ids; 554 struct fc_rport *rport; 555 556 if (port->rport) 557 return; 558 559 ids.node_name = port->wwnn; 560 ids.port_name = port->wwpn; 561 ids.port_id = port->d_id; 562 ids.roles = FC_RPORT_ROLE_FCP_TARGET; 563 564 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); 565 if (!rport) { 566 dev_err(&port->adapter->ccw_device->dev, 567 "Registering port 0x%016Lx failed\n", 568 (unsigned long long)port->wwpn); 569 return; 570 } 571 572 rport->maxframe_size = port->maxframe_size; 573 rport->supported_classes = port->supported_classes; 574 port->rport = rport; 575 port->starget_id = rport->scsi_target_id; 576 577 zfcp_scsi_queue_unit_register(port); 578 } 579 580 static void zfcp_scsi_rport_block(struct zfcp_port *port) 581 { 582 struct fc_rport *rport = port->rport; 583 584 if (rport) { 585 fc_remote_port_delete(rport); 586 port->rport = NULL; 587 } 588 } 589 590 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) 591 { 592 get_device(&port->dev); 593 port->rport_task = RPORT_ADD; 594 595 if (!queue_work(port->adapter->work_queue, &port->rport_work)) 596 put_device(&port->dev); 597 } 598 599 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) 600 { 601 get_device(&port->dev); 602 port->rport_task = RPORT_DEL; 603 604 if (port->rport && queue_work(port->adapter->work_queue, 605 &port->rport_work)) 606 return; 607 608 put_device(&port->dev); 609 } 610 611 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) 612 { 613 unsigned long flags; 614 struct zfcp_port *port; 615 616 read_lock_irqsave(&adapter->port_list_lock, flags); 617 list_for_each_entry(port, &adapter->port_list, list) 618 zfcp_scsi_schedule_rport_block(port); 619 read_unlock_irqrestore(&adapter->port_list_lock, flags); 620 } 621 622 void zfcp_scsi_rport_work(struct work_struct *work) 623 { 624 struct zfcp_port *port = container_of(work, struct zfcp_port, 625 rport_work); 626 627 while (port->rport_task) { 628 if (port->rport_task == RPORT_ADD) { 629 port->rport_task = RPORT_NONE; 630 zfcp_scsi_rport_register(port); 631 } else { 632 port->rport_task = RPORT_NONE; 633 zfcp_scsi_rport_block(port); 634 } 635 } 636 637 put_device(&port->dev); 638 } 639 640 /** 641 * zfcp_scsi_scan - Register LUN with SCSI midlayer 642 * @unit: The LUN/unit to register 643 */ 644 void zfcp_scsi_scan(struct zfcp_unit *unit) 645 { 646 struct fc_rport *rport = unit->port->rport; 647 648 if (rport && rport->port_state == FC_PORTSTATE_ONLINE) 649 scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, 650 scsilun_to_int((struct scsi_lun *) 651 &unit->fcp_lun), 0); 652 } 653 654 void zfcp_scsi_scan_work(struct work_struct *work) 655 { 656 struct zfcp_unit *unit = container_of(work, struct zfcp_unit, 657 scsi_work); 658 659 zfcp_scsi_scan(unit); 660 put_device(&unit->dev); 661 } 662 663 /** 664 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host 665 * @adapter: The adapter where to configure DIF/DIX for the SCSI host 666 */ 667 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) 668 { 669 unsigned int mask = 0; 670 unsigned int data_div; 671 struct Scsi_Host *shost = adapter->scsi_host; 672 673 data_div = atomic_read(&adapter->status) & 674 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; 675 676 if (enable_dif && 677 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) 678 mask |= SHOST_DIF_TYPE1_PROTECTION; 679 680 if (enable_dif && data_div && 681 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { 682 mask |= SHOST_DIX_TYPE1_PROTECTION; 683 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); 684 shost->sg_prot_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; 685 shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; 686 shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2; 687 } 688 689 scsi_host_set_prot(shost, mask); 690 } 691 692 /** 693 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error 694 * @scmd: The SCSI command to report the error for 695 * @ascq: The ASCQ to put in the sense buffer 696 * 697 * See the error handling in sd_done for the sense codes used here. 698 * Set DID_SOFT_ERROR to retry the request, if possible. 699 */ 700 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) 701 { 702 scsi_build_sense_buffer(1, scmd->sense_buffer, 703 ILLEGAL_REQUEST, 0x10, ascq); 704 set_driver_byte(scmd, DRIVER_SENSE); 705 scmd->result |= SAM_STAT_CHECK_CONDITION; 706 set_host_byte(scmd, DID_SOFT_ERROR); 707 } 708 709 struct fc_function_template zfcp_transport_functions = { 710 .show_starget_port_id = 1, 711 .show_starget_port_name = 1, 712 .show_starget_node_name = 1, 713 .show_rport_supported_classes = 1, 714 .show_rport_maxframe_size = 1, 715 .show_rport_dev_loss_tmo = 1, 716 .show_host_node_name = 1, 717 .show_host_port_name = 1, 718 .show_host_permanent_port_name = 1, 719 .show_host_supported_classes = 1, 720 .show_host_supported_fc4s = 1, 721 .show_host_supported_speeds = 1, 722 .show_host_maxframe_size = 1, 723 .show_host_serial_number = 1, 724 .get_fc_host_stats = zfcp_get_fc_host_stats, 725 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 726 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 727 .get_host_port_state = zfcp_get_host_port_state, 728 .terminate_rport_io = zfcp_scsi_terminate_rport_io, 729 .show_host_port_state = 1, 730 .show_host_active_fc4s = 1, 731 .bsg_request = zfcp_fc_exec_bsg_job, 732 .bsg_timeout = zfcp_fc_timeout_bsg_job, 733 /* no functions registered for following dynamic attributes but 734 directly set by LLDD */ 735 .show_host_port_type = 1, 736 .show_host_speed = 1, 737 .show_host_port_id = 1, 738 .disable_target_scan = 1, 739 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), 740 }; 741 742 struct zfcp_data zfcp_data = { 743 .scsi_host_template = { 744 .name = "zfcp", 745 .module = THIS_MODULE, 746 .proc_name = "zfcp", 747 .change_queue_depth = zfcp_scsi_change_queue_depth, 748 .slave_alloc = zfcp_scsi_slave_alloc, 749 .slave_configure = zfcp_scsi_slave_configure, 750 .slave_destroy = zfcp_scsi_slave_destroy, 751 .queuecommand = zfcp_scsi_queuecommand, 752 .eh_abort_handler = zfcp_scsi_eh_abort_handler, 753 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, 754 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, 755 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, 756 .can_queue = 4096, 757 .this_id = -1, 758 .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ, 759 .cmd_per_lun = 1, 760 .use_clustering = 1, 761 .sdev_attrs = zfcp_sysfs_sdev_attrs, 762 .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8), 763 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, 764 .shost_attrs = zfcp_sysfs_shost_attrs, 765 }, 766 }; 767