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 bool allow_lun_scan = 1; 34 module_param(allow_lun_scan, bool, 0600); 35 MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); 36 37 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, 38 int reason) 39 { 40 switch (reason) { 41 case SCSI_QDEPTH_DEFAULT: 42 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 43 break; 44 case SCSI_QDEPTH_QFULL: 45 scsi_track_queue_full(sdev, depth); 46 break; 47 case SCSI_QDEPTH_RAMP_UP: 48 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 49 break; 50 default: 51 return -EOPNOTSUPP; 52 } 53 return sdev->queue_depth; 54 } 55 56 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) 57 { 58 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 59 60 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); 61 put_device(&zfcp_sdev->port->dev); 62 } 63 64 static int zfcp_scsi_slave_configure(struct scsi_device *sdp) 65 { 66 if (sdp->tagged_supported) 67 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); 68 else 69 scsi_adjust_queue_depth(sdp, 0, 1); 70 return 0; 71 } 72 73 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) 74 { 75 set_host_byte(scpnt, result); 76 zfcp_dbf_scsi_fail_send(scpnt); 77 scpnt->scsi_done(scpnt); 78 } 79 80 static 81 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) 82 { 83 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 84 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); 85 int status, scsi_result, ret; 86 87 /* reset the status for this request */ 88 scpnt->result = 0; 89 scpnt->host_scribble = NULL; 90 91 scsi_result = fc_remote_port_chkready(rport); 92 if (unlikely(scsi_result)) { 93 scpnt->result = scsi_result; 94 zfcp_dbf_scsi_fail_send(scpnt); 95 scpnt->scsi_done(scpnt); 96 return 0; 97 } 98 99 status = atomic_read(&zfcp_sdev->status); 100 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && 101 !(atomic_read(&zfcp_sdev->port->status) & 102 ZFCP_STATUS_COMMON_ERP_FAILED)) { 103 /* only LUN access denied, but port is good 104 * not covered by FC transport, have to fail here */ 105 zfcp_scsi_command_fail(scpnt, DID_ERROR); 106 return 0; 107 } 108 109 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { 110 /* This could be either 111 * open LUN pending: this is temporary, will result in 112 * open LUN or ERP_FAILED, so retry command 113 * call to rport_delete pending: mimic retry from 114 * fc_remote_port_chkready until rport is BLOCKED 115 */ 116 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); 117 return 0; 118 } 119 120 ret = zfcp_fsf_fcp_cmnd(scpnt); 121 if (unlikely(ret == -EBUSY)) 122 return SCSI_MLQUEUE_DEVICE_BUSY; 123 else if (unlikely(ret < 0)) 124 return SCSI_MLQUEUE_HOST_BUSY; 125 126 return ret; 127 } 128 129 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) 130 { 131 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 132 struct zfcp_adapter *adapter = 133 (struct zfcp_adapter *) sdev->host->hostdata[0]; 134 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 135 struct zfcp_port *port; 136 struct zfcp_unit *unit; 137 int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; 138 139 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 140 if (!port) 141 return -ENXIO; 142 143 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); 144 if (unit) 145 put_device(&unit->dev); 146 147 if (!unit && !(allow_lun_scan && npiv)) { 148 put_device(&port->dev); 149 return -ENXIO; 150 } 151 152 zfcp_sdev->port = port; 153 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; 154 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; 155 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; 156 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; 157 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; 158 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; 159 spin_lock_init(&zfcp_sdev->latencies.lock); 160 161 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); 162 zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); 163 zfcp_erp_wait(port->adapter); 164 165 return 0; 166 } 167 168 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 169 { 170 struct Scsi_Host *scsi_host = scpnt->device->host; 171 struct zfcp_adapter *adapter = 172 (struct zfcp_adapter *) scsi_host->hostdata[0]; 173 struct zfcp_fsf_req *old_req, *abrt_req; 174 unsigned long flags; 175 unsigned long old_reqid = (unsigned long) scpnt->host_scribble; 176 int retval = SUCCESS, ret; 177 int retry = 3; 178 char *dbf_tag; 179 180 /* avoid race condition between late normal completion and abort */ 181 write_lock_irqsave(&adapter->abort_lock, flags); 182 183 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); 184 if (!old_req) { 185 write_unlock_irqrestore(&adapter->abort_lock, flags); 186 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); 187 return FAILED; /* completion could be in progress */ 188 } 189 old_req->data = NULL; 190 191 /* don't access old fsf_req after releasing the abort_lock */ 192 write_unlock_irqrestore(&adapter->abort_lock, flags); 193 194 while (retry--) { 195 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); 196 if (abrt_req) 197 break; 198 199 zfcp_erp_wait(adapter); 200 ret = fc_block_scsi_eh(scpnt); 201 if (ret) { 202 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); 203 return ret; 204 } 205 if (!(atomic_read(&adapter->status) & 206 ZFCP_STATUS_COMMON_RUNNING)) { 207 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); 208 return SUCCESS; 209 } 210 } 211 if (!abrt_req) { 212 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); 213 return FAILED; 214 } 215 216 wait_for_completion(&abrt_req->completion); 217 218 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) 219 dbf_tag = "abrt_ok"; 220 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) 221 dbf_tag = "abrt_nn"; 222 else { 223 dbf_tag = "abrt_fa"; 224 retval = FAILED; 225 } 226 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); 227 zfcp_fsf_req_free(abrt_req); 228 return retval; 229 } 230 231 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) 232 { 233 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 234 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 235 struct zfcp_fsf_req *fsf_req = NULL; 236 int retval = SUCCESS, ret; 237 int retry = 3; 238 239 while (retry--) { 240 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); 241 if (fsf_req) 242 break; 243 244 zfcp_erp_wait(adapter); 245 ret = fc_block_scsi_eh(scpnt); 246 if (ret) 247 return ret; 248 249 if (!(atomic_read(&adapter->status) & 250 ZFCP_STATUS_COMMON_RUNNING)) { 251 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); 252 return SUCCESS; 253 } 254 } 255 if (!fsf_req) 256 return FAILED; 257 258 wait_for_completion(&fsf_req->completion); 259 260 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 261 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); 262 retval = FAILED; 263 } else 264 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); 265 266 zfcp_fsf_req_free(fsf_req); 267 return retval; 268 } 269 270 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) 271 { 272 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); 273 } 274 275 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) 276 { 277 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); 278 } 279 280 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 281 { 282 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 283 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 284 int ret; 285 286 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); 287 zfcp_erp_wait(adapter); 288 ret = fc_block_scsi_eh(scpnt); 289 if (ret) 290 return ret; 291 292 return SUCCESS; 293 } 294 295 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) 296 { 297 struct ccw_dev_id dev_id; 298 299 if (adapter->scsi_host) 300 return 0; 301 302 ccw_device_get_id(adapter->ccw_device, &dev_id); 303 /* register adapter as SCSI host with mid layer of SCSI stack */ 304 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, 305 sizeof (struct zfcp_adapter *)); 306 if (!adapter->scsi_host) { 307 dev_err(&adapter->ccw_device->dev, 308 "Registering the FCP device with the " 309 "SCSI stack failed\n"); 310 return -EIO; 311 } 312 313 /* tell the SCSI stack some characteristics of this adapter */ 314 adapter->scsi_host->max_id = 511; 315 adapter->scsi_host->max_lun = 0xFFFFFFFF; 316 adapter->scsi_host->max_channel = 0; 317 adapter->scsi_host->unique_id = dev_id.devno; 318 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ 319 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; 320 321 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 322 323 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 324 scsi_host_put(adapter->scsi_host); 325 return -EIO; 326 } 327 328 return 0; 329 } 330 331 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) 332 { 333 struct Scsi_Host *shost; 334 struct zfcp_port *port; 335 336 shost = adapter->scsi_host; 337 if (!shost) 338 return; 339 340 read_lock_irq(&adapter->port_list_lock); 341 list_for_each_entry(port, &adapter->port_list, list) 342 port->rport = NULL; 343 read_unlock_irq(&adapter->port_list_lock); 344 345 fc_remove_host(shost); 346 scsi_remove_host(shost); 347 scsi_host_put(shost); 348 adapter->scsi_host = NULL; 349 350 return; 351 } 352 353 static struct fc_host_statistics* 354 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 355 { 356 struct fc_host_statistics *fc_stats; 357 358 if (!adapter->fc_stats) { 359 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); 360 if (!fc_stats) 361 return NULL; 362 adapter->fc_stats = fc_stats; /* freed in adapter_release */ 363 } 364 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); 365 return adapter->fc_stats; 366 } 367 368 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 369 struct fsf_qtcb_bottom_port *data, 370 struct fsf_qtcb_bottom_port *old) 371 { 372 fc_stats->seconds_since_last_reset = 373 data->seconds_since_last_reset - old->seconds_since_last_reset; 374 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 375 fc_stats->tx_words = data->tx_words - old->tx_words; 376 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 377 fc_stats->rx_words = data->rx_words - old->rx_words; 378 fc_stats->lip_count = data->lip - old->lip; 379 fc_stats->nos_count = data->nos - old->nos; 380 fc_stats->error_frames = data->error_frames - old->error_frames; 381 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 382 fc_stats->link_failure_count = data->link_failure - old->link_failure; 383 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 384 fc_stats->loss_of_signal_count = 385 data->loss_of_signal - old->loss_of_signal; 386 fc_stats->prim_seq_protocol_err_count = 387 data->psp_error_counts - old->psp_error_counts; 388 fc_stats->invalid_tx_word_count = 389 data->invalid_tx_words - old->invalid_tx_words; 390 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 391 fc_stats->fcp_input_requests = 392 data->input_requests - old->input_requests; 393 fc_stats->fcp_output_requests = 394 data->output_requests - old->output_requests; 395 fc_stats->fcp_control_requests = 396 data->control_requests - old->control_requests; 397 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 398 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 399 } 400 401 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 402 struct fsf_qtcb_bottom_port *data) 403 { 404 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 405 fc_stats->tx_frames = data->tx_frames; 406 fc_stats->tx_words = data->tx_words; 407 fc_stats->rx_frames = data->rx_frames; 408 fc_stats->rx_words = data->rx_words; 409 fc_stats->lip_count = data->lip; 410 fc_stats->nos_count = data->nos; 411 fc_stats->error_frames = data->error_frames; 412 fc_stats->dumped_frames = data->dumped_frames; 413 fc_stats->link_failure_count = data->link_failure; 414 fc_stats->loss_of_sync_count = data->loss_of_sync; 415 fc_stats->loss_of_signal_count = data->loss_of_signal; 416 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; 417 fc_stats->invalid_tx_word_count = data->invalid_tx_words; 418 fc_stats->invalid_crc_count = data->invalid_crcs; 419 fc_stats->fcp_input_requests = data->input_requests; 420 fc_stats->fcp_output_requests = data->output_requests; 421 fc_stats->fcp_control_requests = data->control_requests; 422 fc_stats->fcp_input_megabytes = data->input_mb; 423 fc_stats->fcp_output_megabytes = data->output_mb; 424 } 425 426 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) 427 { 428 struct zfcp_adapter *adapter; 429 struct fc_host_statistics *fc_stats; 430 struct fsf_qtcb_bottom_port *data; 431 int ret; 432 433 adapter = (struct zfcp_adapter *)host->hostdata[0]; 434 fc_stats = zfcp_init_fc_host_stats(adapter); 435 if (!fc_stats) 436 return NULL; 437 438 data = kzalloc(sizeof(*data), GFP_KERNEL); 439 if (!data) 440 return NULL; 441 442 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 443 if (ret) { 444 kfree(data); 445 return NULL; 446 } 447 448 if (adapter->stats_reset && 449 ((jiffies/HZ - adapter->stats_reset) < 450 data->seconds_since_last_reset)) 451 zfcp_adjust_fc_host_stats(fc_stats, data, 452 adapter->stats_reset_data); 453 else 454 zfcp_set_fc_host_stats(fc_stats, data); 455 456 kfree(data); 457 return fc_stats; 458 } 459 460 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 461 { 462 struct zfcp_adapter *adapter; 463 struct fsf_qtcb_bottom_port *data; 464 int ret; 465 466 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 467 data = kzalloc(sizeof(*data), GFP_KERNEL); 468 if (!data) 469 return; 470 471 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 472 if (ret) 473 kfree(data); 474 else { 475 adapter->stats_reset = jiffies/HZ; 476 kfree(adapter->stats_reset_data); 477 adapter->stats_reset_data = data; /* finally freed in 478 adapter_release */ 479 } 480 } 481 482 static void zfcp_get_host_port_state(struct Scsi_Host *shost) 483 { 484 struct zfcp_adapter *adapter = 485 (struct zfcp_adapter *)shost->hostdata[0]; 486 int status = atomic_read(&adapter->status); 487 488 if ((status & ZFCP_STATUS_COMMON_RUNNING) && 489 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) 490 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 491 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 492 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 493 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) 494 fc_host_port_state(shost) = FC_PORTSTATE_ERROR; 495 else 496 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 497 } 498 499 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 500 { 501 rport->dev_loss_tmo = timeout; 502 } 503 504 /** 505 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport 506 * @rport: The FC rport where to teminate I/O 507 * 508 * Abort all pending SCSI commands for a port by closing the 509 * port. Using a reopen avoids a conflict with a shutdown 510 * overwriting a reopen. The "forced" ensures that a disappeared port 511 * is not opened again as valid due to the cached plogi data in 512 * non-NPIV mode. 513 */ 514 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) 515 { 516 struct zfcp_port *port; 517 struct Scsi_Host *shost = rport_to_shost(rport); 518 struct zfcp_adapter *adapter = 519 (struct zfcp_adapter *)shost->hostdata[0]; 520 521 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 522 523 if (port) { 524 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); 525 put_device(&port->dev); 526 } 527 } 528 529 static void zfcp_scsi_rport_register(struct zfcp_port *port) 530 { 531 struct fc_rport_identifiers ids; 532 struct fc_rport *rport; 533 534 if (port->rport) 535 return; 536 537 ids.node_name = port->wwnn; 538 ids.port_name = port->wwpn; 539 ids.port_id = port->d_id; 540 ids.roles = FC_RPORT_ROLE_FCP_TARGET; 541 542 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); 543 if (!rport) { 544 dev_err(&port->adapter->ccw_device->dev, 545 "Registering port 0x%016Lx failed\n", 546 (unsigned long long)port->wwpn); 547 return; 548 } 549 550 rport->maxframe_size = port->maxframe_size; 551 rport->supported_classes = port->supported_classes; 552 port->rport = rport; 553 port->starget_id = rport->scsi_target_id; 554 555 zfcp_unit_queue_scsi_scan(port); 556 } 557 558 static void zfcp_scsi_rport_block(struct zfcp_port *port) 559 { 560 struct fc_rport *rport = port->rport; 561 562 if (rport) { 563 fc_remote_port_delete(rport); 564 port->rport = NULL; 565 } 566 } 567 568 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) 569 { 570 get_device(&port->dev); 571 port->rport_task = RPORT_ADD; 572 573 if (!queue_work(port->adapter->work_queue, &port->rport_work)) 574 put_device(&port->dev); 575 } 576 577 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) 578 { 579 get_device(&port->dev); 580 port->rport_task = RPORT_DEL; 581 582 if (port->rport && queue_work(port->adapter->work_queue, 583 &port->rport_work)) 584 return; 585 586 put_device(&port->dev); 587 } 588 589 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) 590 { 591 unsigned long flags; 592 struct zfcp_port *port; 593 594 read_lock_irqsave(&adapter->port_list_lock, flags); 595 list_for_each_entry(port, &adapter->port_list, list) 596 zfcp_scsi_schedule_rport_block(port); 597 read_unlock_irqrestore(&adapter->port_list_lock, flags); 598 } 599 600 void zfcp_scsi_rport_work(struct work_struct *work) 601 { 602 struct zfcp_port *port = container_of(work, struct zfcp_port, 603 rport_work); 604 605 while (port->rport_task) { 606 if (port->rport_task == RPORT_ADD) { 607 port->rport_task = RPORT_NONE; 608 zfcp_scsi_rport_register(port); 609 } else { 610 port->rport_task = RPORT_NONE; 611 zfcp_scsi_rport_block(port); 612 } 613 } 614 615 put_device(&port->dev); 616 } 617 618 /** 619 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host 620 * @adapter: The adapter where to configure DIF/DIX for the SCSI host 621 */ 622 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) 623 { 624 unsigned int mask = 0; 625 unsigned int data_div; 626 struct Scsi_Host *shost = adapter->scsi_host; 627 628 data_div = atomic_read(&adapter->status) & 629 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; 630 631 if (enable_dif && 632 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) 633 mask |= SHOST_DIF_TYPE1_PROTECTION; 634 635 if (enable_dif && data_div && 636 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { 637 mask |= SHOST_DIX_TYPE1_PROTECTION; 638 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); 639 shost->sg_prot_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; 640 shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; 641 shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2; 642 } 643 644 scsi_host_set_prot(shost, mask); 645 } 646 647 /** 648 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error 649 * @scmd: The SCSI command to report the error for 650 * @ascq: The ASCQ to put in the sense buffer 651 * 652 * See the error handling in sd_done for the sense codes used here. 653 * Set DID_SOFT_ERROR to retry the request, if possible. 654 */ 655 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) 656 { 657 scsi_build_sense_buffer(1, scmd->sense_buffer, 658 ILLEGAL_REQUEST, 0x10, ascq); 659 set_driver_byte(scmd, DRIVER_SENSE); 660 scmd->result |= SAM_STAT_CHECK_CONDITION; 661 set_host_byte(scmd, DID_SOFT_ERROR); 662 } 663 664 struct fc_function_template zfcp_transport_functions = { 665 .show_starget_port_id = 1, 666 .show_starget_port_name = 1, 667 .show_starget_node_name = 1, 668 .show_rport_supported_classes = 1, 669 .show_rport_maxframe_size = 1, 670 .show_rport_dev_loss_tmo = 1, 671 .show_host_node_name = 1, 672 .show_host_port_name = 1, 673 .show_host_permanent_port_name = 1, 674 .show_host_supported_classes = 1, 675 .show_host_supported_fc4s = 1, 676 .show_host_supported_speeds = 1, 677 .show_host_maxframe_size = 1, 678 .show_host_serial_number = 1, 679 .get_fc_host_stats = zfcp_get_fc_host_stats, 680 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 681 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 682 .get_host_port_state = zfcp_get_host_port_state, 683 .terminate_rport_io = zfcp_scsi_terminate_rport_io, 684 .show_host_port_state = 1, 685 .show_host_active_fc4s = 1, 686 .bsg_request = zfcp_fc_exec_bsg_job, 687 .bsg_timeout = zfcp_fc_timeout_bsg_job, 688 /* no functions registered for following dynamic attributes but 689 directly set by LLDD */ 690 .show_host_port_type = 1, 691 .show_host_speed = 1, 692 .show_host_port_id = 1, 693 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), 694 }; 695 696 struct zfcp_data zfcp_data = { 697 .scsi_host_template = { 698 .name = "zfcp", 699 .module = THIS_MODULE, 700 .proc_name = "zfcp", 701 .change_queue_depth = zfcp_scsi_change_queue_depth, 702 .slave_alloc = zfcp_scsi_slave_alloc, 703 .slave_configure = zfcp_scsi_slave_configure, 704 .slave_destroy = zfcp_scsi_slave_destroy, 705 .queuecommand = zfcp_scsi_queuecommand, 706 .eh_abort_handler = zfcp_scsi_eh_abort_handler, 707 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, 708 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, 709 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, 710 .can_queue = 4096, 711 .this_id = -1, 712 .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ, 713 .cmd_per_lun = 1, 714 .use_clustering = 1, 715 .sdev_attrs = zfcp_sysfs_sdev_attrs, 716 .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8), 717 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, 718 .shost_attrs = zfcp_sysfs_shost_attrs, 719 }, 720 }; 721