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 *sdev) 53 { 54 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 55 56 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); 57 put_device(&zfcp_sdev->port->dev); 58 } 59 60 static int zfcp_scsi_slave_configure(struct scsi_device *sdp) 61 { 62 if (sdp->tagged_supported) 63 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); 64 else 65 scsi_adjust_queue_depth(sdp, 0, 1); 66 return 0; 67 } 68 69 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) 70 { 71 struct zfcp_adapter *adapter = 72 (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; 73 74 set_host_byte(scpnt, result); 75 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); 76 scpnt->scsi_done(scpnt); 77 } 78 79 static 80 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) 81 { 82 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 83 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 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(adapter->dbf, 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; 137 138 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 139 if (!port) 140 return -ENXIO; 141 142 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); 143 if (unit) 144 put_device(&unit->dev); 145 146 if (!unit && !(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) { 147 put_device(&port->dev); 148 return -ENXIO; 149 } 150 151 zfcp_sdev->port = port; 152 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; 153 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; 154 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; 155 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; 156 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; 157 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; 158 spin_lock_init(&zfcp_sdev->latencies.lock); 159 160 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); 161 zfcp_erp_lun_reopen(sdev, 0, "scsla_1", NULL); 162 zfcp_erp_wait(port->adapter); 163 164 return 0; 165 } 166 167 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 168 { 169 struct Scsi_Host *scsi_host = scpnt->device->host; 170 struct zfcp_adapter *adapter = 171 (struct zfcp_adapter *) scsi_host->hostdata[0]; 172 struct zfcp_fsf_req *old_req, *abrt_req; 173 unsigned long flags; 174 unsigned long old_reqid = (unsigned long) scpnt->host_scribble; 175 int retval = SUCCESS, ret; 176 int retry = 3; 177 char *dbf_tag; 178 179 /* avoid race condition between late normal completion and abort */ 180 write_lock_irqsave(&adapter->abort_lock, flags); 181 182 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); 183 if (!old_req) { 184 write_unlock_irqrestore(&adapter->abort_lock, flags); 185 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL, 186 old_reqid); 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 return ret; 203 if (!(atomic_read(&adapter->status) & 204 ZFCP_STATUS_COMMON_RUNNING)) { 205 zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, 206 old_reqid); 207 return SUCCESS; 208 } 209 } 210 if (!abrt_req) 211 return FAILED; 212 213 wait_for_completion(&abrt_req->completion); 214 215 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) 216 dbf_tag = "okay"; 217 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) 218 dbf_tag = "lte2"; 219 else { 220 dbf_tag = "fail"; 221 retval = FAILED; 222 } 223 zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); 224 zfcp_fsf_req_free(abrt_req); 225 return retval; 226 } 227 228 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) 229 { 230 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 231 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 232 struct zfcp_fsf_req *fsf_req = NULL; 233 int retval = SUCCESS, ret; 234 int retry = 3; 235 236 while (retry--) { 237 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); 238 if (fsf_req) 239 break; 240 241 zfcp_erp_wait(adapter); 242 ret = fc_block_scsi_eh(scpnt); 243 if (ret) 244 return ret; 245 246 if (!(atomic_read(&adapter->status) & 247 ZFCP_STATUS_COMMON_RUNNING)) { 248 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); 249 return SUCCESS; 250 } 251 } 252 if (!fsf_req) 253 return FAILED; 254 255 wait_for_completion(&fsf_req->completion); 256 257 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 258 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); 259 retval = FAILED; 260 } else 261 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); 262 263 zfcp_fsf_req_free(fsf_req); 264 return retval; 265 } 266 267 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) 268 { 269 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); 270 } 271 272 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) 273 { 274 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); 275 } 276 277 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 278 { 279 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 280 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 281 int ret; 282 283 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); 284 zfcp_erp_wait(adapter); 285 ret = fc_block_scsi_eh(scpnt); 286 if (ret) 287 return ret; 288 289 return SUCCESS; 290 } 291 292 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) 293 { 294 struct ccw_dev_id dev_id; 295 296 if (adapter->scsi_host) 297 return 0; 298 299 ccw_device_get_id(adapter->ccw_device, &dev_id); 300 /* register adapter as SCSI host with mid layer of SCSI stack */ 301 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, 302 sizeof (struct zfcp_adapter *)); 303 if (!adapter->scsi_host) { 304 dev_err(&adapter->ccw_device->dev, 305 "Registering the FCP device with the " 306 "SCSI stack failed\n"); 307 return -EIO; 308 } 309 310 /* tell the SCSI stack some characteristics of this adapter */ 311 adapter->scsi_host->max_id = 511; 312 adapter->scsi_host->max_lun = 0xFFFFFFFF; 313 adapter->scsi_host->max_channel = 0; 314 adapter->scsi_host->unique_id = dev_id.devno; 315 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ 316 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; 317 318 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 319 320 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 321 scsi_host_put(adapter->scsi_host); 322 return -EIO; 323 } 324 325 return 0; 326 } 327 328 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) 329 { 330 struct Scsi_Host *shost; 331 struct zfcp_port *port; 332 333 shost = adapter->scsi_host; 334 if (!shost) 335 return; 336 337 read_lock_irq(&adapter->port_list_lock); 338 list_for_each_entry(port, &adapter->port_list, list) 339 port->rport = NULL; 340 read_unlock_irq(&adapter->port_list_lock); 341 342 fc_remove_host(shost); 343 scsi_remove_host(shost); 344 scsi_host_put(shost); 345 adapter->scsi_host = NULL; 346 347 return; 348 } 349 350 static struct fc_host_statistics* 351 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 352 { 353 struct fc_host_statistics *fc_stats; 354 355 if (!adapter->fc_stats) { 356 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); 357 if (!fc_stats) 358 return NULL; 359 adapter->fc_stats = fc_stats; /* freed in adapter_release */ 360 } 361 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); 362 return adapter->fc_stats; 363 } 364 365 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 366 struct fsf_qtcb_bottom_port *data, 367 struct fsf_qtcb_bottom_port *old) 368 { 369 fc_stats->seconds_since_last_reset = 370 data->seconds_since_last_reset - old->seconds_since_last_reset; 371 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 372 fc_stats->tx_words = data->tx_words - old->tx_words; 373 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 374 fc_stats->rx_words = data->rx_words - old->rx_words; 375 fc_stats->lip_count = data->lip - old->lip; 376 fc_stats->nos_count = data->nos - old->nos; 377 fc_stats->error_frames = data->error_frames - old->error_frames; 378 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 379 fc_stats->link_failure_count = data->link_failure - old->link_failure; 380 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 381 fc_stats->loss_of_signal_count = 382 data->loss_of_signal - old->loss_of_signal; 383 fc_stats->prim_seq_protocol_err_count = 384 data->psp_error_counts - old->psp_error_counts; 385 fc_stats->invalid_tx_word_count = 386 data->invalid_tx_words - old->invalid_tx_words; 387 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 388 fc_stats->fcp_input_requests = 389 data->input_requests - old->input_requests; 390 fc_stats->fcp_output_requests = 391 data->output_requests - old->output_requests; 392 fc_stats->fcp_control_requests = 393 data->control_requests - old->control_requests; 394 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 395 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 396 } 397 398 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 399 struct fsf_qtcb_bottom_port *data) 400 { 401 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 402 fc_stats->tx_frames = data->tx_frames; 403 fc_stats->tx_words = data->tx_words; 404 fc_stats->rx_frames = data->rx_frames; 405 fc_stats->rx_words = data->rx_words; 406 fc_stats->lip_count = data->lip; 407 fc_stats->nos_count = data->nos; 408 fc_stats->error_frames = data->error_frames; 409 fc_stats->dumped_frames = data->dumped_frames; 410 fc_stats->link_failure_count = data->link_failure; 411 fc_stats->loss_of_sync_count = data->loss_of_sync; 412 fc_stats->loss_of_signal_count = data->loss_of_signal; 413 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; 414 fc_stats->invalid_tx_word_count = data->invalid_tx_words; 415 fc_stats->invalid_crc_count = data->invalid_crcs; 416 fc_stats->fcp_input_requests = data->input_requests; 417 fc_stats->fcp_output_requests = data->output_requests; 418 fc_stats->fcp_control_requests = data->control_requests; 419 fc_stats->fcp_input_megabytes = data->input_mb; 420 fc_stats->fcp_output_megabytes = data->output_mb; 421 } 422 423 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) 424 { 425 struct zfcp_adapter *adapter; 426 struct fc_host_statistics *fc_stats; 427 struct fsf_qtcb_bottom_port *data; 428 int ret; 429 430 adapter = (struct zfcp_adapter *)host->hostdata[0]; 431 fc_stats = zfcp_init_fc_host_stats(adapter); 432 if (!fc_stats) 433 return NULL; 434 435 data = kzalloc(sizeof(*data), GFP_KERNEL); 436 if (!data) 437 return NULL; 438 439 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 440 if (ret) { 441 kfree(data); 442 return NULL; 443 } 444 445 if (adapter->stats_reset && 446 ((jiffies/HZ - adapter->stats_reset) < 447 data->seconds_since_last_reset)) 448 zfcp_adjust_fc_host_stats(fc_stats, data, 449 adapter->stats_reset_data); 450 else 451 zfcp_set_fc_host_stats(fc_stats, data); 452 453 kfree(data); 454 return fc_stats; 455 } 456 457 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 458 { 459 struct zfcp_adapter *adapter; 460 struct fsf_qtcb_bottom_port *data; 461 int ret; 462 463 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 464 data = kzalloc(sizeof(*data), GFP_KERNEL); 465 if (!data) 466 return; 467 468 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 469 if (ret) 470 kfree(data); 471 else { 472 adapter->stats_reset = jiffies/HZ; 473 kfree(adapter->stats_reset_data); 474 adapter->stats_reset_data = data; /* finally freed in 475 adapter_release */ 476 } 477 } 478 479 static void zfcp_get_host_port_state(struct Scsi_Host *shost) 480 { 481 struct zfcp_adapter *adapter = 482 (struct zfcp_adapter *)shost->hostdata[0]; 483 int status = atomic_read(&adapter->status); 484 485 if ((status & ZFCP_STATUS_COMMON_RUNNING) && 486 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) 487 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 488 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 489 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 490 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) 491 fc_host_port_state(shost) = FC_PORTSTATE_ERROR; 492 else 493 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 494 } 495 496 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 497 { 498 rport->dev_loss_tmo = timeout; 499 } 500 501 /** 502 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport 503 * @rport: The FC rport where to teminate I/O 504 * 505 * Abort all pending SCSI commands for a port by closing the 506 * port. Using a reopen avoids a conflict with a shutdown 507 * overwriting a reopen. The "forced" ensures that a disappeared port 508 * is not opened again as valid due to the cached plogi data in 509 * non-NPIV mode. 510 */ 511 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) 512 { 513 struct zfcp_port *port; 514 struct Scsi_Host *shost = rport_to_shost(rport); 515 struct zfcp_adapter *adapter = 516 (struct zfcp_adapter *)shost->hostdata[0]; 517 518 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 519 520 if (port) { 521 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1", NULL); 522 put_device(&port->dev); 523 } 524 } 525 526 static void zfcp_scsi_rport_register(struct zfcp_port *port) 527 { 528 struct fc_rport_identifiers ids; 529 struct fc_rport *rport; 530 531 if (port->rport) 532 return; 533 534 ids.node_name = port->wwnn; 535 ids.port_name = port->wwpn; 536 ids.port_id = port->d_id; 537 ids.roles = FC_RPORT_ROLE_FCP_TARGET; 538 539 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); 540 if (!rport) { 541 dev_err(&port->adapter->ccw_device->dev, 542 "Registering port 0x%016Lx failed\n", 543 (unsigned long long)port->wwpn); 544 return; 545 } 546 547 rport->maxframe_size = port->maxframe_size; 548 rport->supported_classes = port->supported_classes; 549 port->rport = rport; 550 port->starget_id = rport->scsi_target_id; 551 552 zfcp_unit_queue_scsi_scan(port); 553 } 554 555 static void zfcp_scsi_rport_block(struct zfcp_port *port) 556 { 557 struct fc_rport *rport = port->rport; 558 559 if (rport) { 560 fc_remote_port_delete(rport); 561 port->rport = NULL; 562 } 563 } 564 565 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) 566 { 567 get_device(&port->dev); 568 port->rport_task = RPORT_ADD; 569 570 if (!queue_work(port->adapter->work_queue, &port->rport_work)) 571 put_device(&port->dev); 572 } 573 574 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) 575 { 576 get_device(&port->dev); 577 port->rport_task = RPORT_DEL; 578 579 if (port->rport && queue_work(port->adapter->work_queue, 580 &port->rport_work)) 581 return; 582 583 put_device(&port->dev); 584 } 585 586 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) 587 { 588 unsigned long flags; 589 struct zfcp_port *port; 590 591 read_lock_irqsave(&adapter->port_list_lock, flags); 592 list_for_each_entry(port, &adapter->port_list, list) 593 zfcp_scsi_schedule_rport_block(port); 594 read_unlock_irqrestore(&adapter->port_list_lock, flags); 595 } 596 597 void zfcp_scsi_rport_work(struct work_struct *work) 598 { 599 struct zfcp_port *port = container_of(work, struct zfcp_port, 600 rport_work); 601 602 while (port->rport_task) { 603 if (port->rport_task == RPORT_ADD) { 604 port->rport_task = RPORT_NONE; 605 zfcp_scsi_rport_register(port); 606 } else { 607 port->rport_task = RPORT_NONE; 608 zfcp_scsi_rport_block(port); 609 } 610 } 611 612 put_device(&port->dev); 613 } 614 615 /** 616 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host 617 * @adapter: The adapter where to configure DIF/DIX for the SCSI host 618 */ 619 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) 620 { 621 unsigned int mask = 0; 622 unsigned int data_div; 623 struct Scsi_Host *shost = adapter->scsi_host; 624 625 data_div = atomic_read(&adapter->status) & 626 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; 627 628 if (enable_dif && 629 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) 630 mask |= SHOST_DIF_TYPE1_PROTECTION; 631 632 if (enable_dif && data_div && 633 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { 634 mask |= SHOST_DIX_TYPE1_PROTECTION; 635 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); 636 shost->sg_prot_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; 637 shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; 638 shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2; 639 } 640 641 scsi_host_set_prot(shost, mask); 642 } 643 644 /** 645 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error 646 * @scmd: The SCSI command to report the error for 647 * @ascq: The ASCQ to put in the sense buffer 648 * 649 * See the error handling in sd_done for the sense codes used here. 650 * Set DID_SOFT_ERROR to retry the request, if possible. 651 */ 652 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) 653 { 654 scsi_build_sense_buffer(1, scmd->sense_buffer, 655 ILLEGAL_REQUEST, 0x10, ascq); 656 set_driver_byte(scmd, DRIVER_SENSE); 657 scmd->result |= SAM_STAT_CHECK_CONDITION; 658 set_host_byte(scmd, DID_SOFT_ERROR); 659 } 660 661 struct fc_function_template zfcp_transport_functions = { 662 .show_starget_port_id = 1, 663 .show_starget_port_name = 1, 664 .show_starget_node_name = 1, 665 .show_rport_supported_classes = 1, 666 .show_rport_maxframe_size = 1, 667 .show_rport_dev_loss_tmo = 1, 668 .show_host_node_name = 1, 669 .show_host_port_name = 1, 670 .show_host_permanent_port_name = 1, 671 .show_host_supported_classes = 1, 672 .show_host_supported_fc4s = 1, 673 .show_host_supported_speeds = 1, 674 .show_host_maxframe_size = 1, 675 .show_host_serial_number = 1, 676 .get_fc_host_stats = zfcp_get_fc_host_stats, 677 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 678 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 679 .get_host_port_state = zfcp_get_host_port_state, 680 .terminate_rport_io = zfcp_scsi_terminate_rport_io, 681 .show_host_port_state = 1, 682 .show_host_active_fc4s = 1, 683 .bsg_request = zfcp_fc_exec_bsg_job, 684 .bsg_timeout = zfcp_fc_timeout_bsg_job, 685 /* no functions registered for following dynamic attributes but 686 directly set by LLDD */ 687 .show_host_port_type = 1, 688 .show_host_speed = 1, 689 .show_host_port_id = 1, 690 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), 691 }; 692 693 struct zfcp_data zfcp_data = { 694 .scsi_host_template = { 695 .name = "zfcp", 696 .module = THIS_MODULE, 697 .proc_name = "zfcp", 698 .change_queue_depth = zfcp_scsi_change_queue_depth, 699 .slave_alloc = zfcp_scsi_slave_alloc, 700 .slave_configure = zfcp_scsi_slave_configure, 701 .slave_destroy = zfcp_scsi_slave_destroy, 702 .queuecommand = zfcp_scsi_queuecommand, 703 .eh_abort_handler = zfcp_scsi_eh_abort_handler, 704 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, 705 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, 706 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, 707 .can_queue = 4096, 708 .this_id = -1, 709 .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ, 710 .cmd_per_lun = 1, 711 .use_clustering = 1, 712 .sdev_attrs = zfcp_sysfs_sdev_attrs, 713 .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8), 714 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, 715 .shost_attrs = zfcp_sysfs_shost_attrs, 716 }, 717 }; 718