1 /* 2 * zfcp device driver 3 * 4 * Interface to Linux SCSI midlayer. 5 * 6 * Copyright IBM Corp. 2002, 2013 7 */ 8 9 #define KMSG_COMPONENT "zfcp" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/module.h> 13 #include <linux/types.h> 14 #include <linux/slab.h> 15 #include <scsi/fc/fc_fcp.h> 16 #include <scsi/scsi_eh.h> 17 #include <linux/atomic.h> 18 #include "zfcp_ext.h" 19 #include "zfcp_dbf.h" 20 #include "zfcp_fc.h" 21 #include "zfcp_reqlist.h" 22 23 static unsigned int default_depth = 32; 24 module_param_named(queue_depth, default_depth, uint, 0600); 25 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); 26 27 static bool enable_dif; 28 module_param_named(dif, enable_dif, bool, 0400); 29 MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); 30 31 static bool allow_lun_scan = 1; 32 module_param(allow_lun_scan, bool, 0600); 33 MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); 34 35 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, 36 int reason) 37 { 38 switch (reason) { 39 case SCSI_QDEPTH_DEFAULT: 40 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 41 break; 42 case SCSI_QDEPTH_QFULL: 43 scsi_track_queue_full(sdev, depth); 44 break; 45 case SCSI_QDEPTH_RAMP_UP: 46 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 47 break; 48 default: 49 return -EOPNOTSUPP; 50 } 51 return sdev->queue_depth; 52 } 53 54 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) 55 { 56 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 57 58 /* if previous slave_alloc returned early, there is nothing to do */ 59 if (!zfcp_sdev->port) 60 return; 61 62 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); 63 put_device(&zfcp_sdev->port->dev); 64 } 65 66 static int zfcp_scsi_slave_configure(struct scsi_device *sdp) 67 { 68 if (sdp->tagged_supported) 69 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); 70 else 71 scsi_adjust_queue_depth(sdp, 0, 1); 72 return 0; 73 } 74 75 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) 76 { 77 set_host_byte(scpnt, result); 78 zfcp_dbf_scsi_fail_send(scpnt); 79 scpnt->scsi_done(scpnt); 80 } 81 82 static 83 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) 84 { 85 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 86 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); 87 int status, scsi_result, ret; 88 89 /* reset the status for this request */ 90 scpnt->result = 0; 91 scpnt->host_scribble = NULL; 92 93 scsi_result = fc_remote_port_chkready(rport); 94 if (unlikely(scsi_result)) { 95 scpnt->result = scsi_result; 96 zfcp_dbf_scsi_fail_send(scpnt); 97 scpnt->scsi_done(scpnt); 98 return 0; 99 } 100 101 status = atomic_read(&zfcp_sdev->status); 102 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && 103 !(atomic_read(&zfcp_sdev->port->status) & 104 ZFCP_STATUS_COMMON_ERP_FAILED)) { 105 /* only LUN access denied, but port is good 106 * not covered by FC transport, have to fail here */ 107 zfcp_scsi_command_fail(scpnt, DID_ERROR); 108 return 0; 109 } 110 111 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { 112 /* This could be either 113 * open LUN pending: this is temporary, will result in 114 * open LUN or ERP_FAILED, so retry command 115 * call to rport_delete pending: mimic retry from 116 * fc_remote_port_chkready until rport is BLOCKED 117 */ 118 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); 119 return 0; 120 } 121 122 ret = zfcp_fsf_fcp_cmnd(scpnt); 123 if (unlikely(ret == -EBUSY)) 124 return SCSI_MLQUEUE_DEVICE_BUSY; 125 else if (unlikely(ret < 0)) 126 return SCSI_MLQUEUE_HOST_BUSY; 127 128 return ret; 129 } 130 131 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) 132 { 133 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 134 struct zfcp_adapter *adapter = 135 (struct zfcp_adapter *) sdev->host->hostdata[0]; 136 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 137 struct zfcp_port *port; 138 struct zfcp_unit *unit; 139 int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; 140 141 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 142 if (!port) 143 return -ENXIO; 144 145 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); 146 if (unit) 147 put_device(&unit->dev); 148 149 if (!unit && !(allow_lun_scan && npiv)) { 150 put_device(&port->dev); 151 return -ENXIO; 152 } 153 154 zfcp_sdev->port = port; 155 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; 156 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; 157 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; 158 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; 159 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; 160 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; 161 spin_lock_init(&zfcp_sdev->latencies.lock); 162 163 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); 164 zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); 165 zfcp_erp_wait(port->adapter); 166 167 return 0; 168 } 169 170 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 171 { 172 struct Scsi_Host *scsi_host = scpnt->device->host; 173 struct zfcp_adapter *adapter = 174 (struct zfcp_adapter *) scsi_host->hostdata[0]; 175 struct zfcp_fsf_req *old_req, *abrt_req; 176 unsigned long flags; 177 unsigned long old_reqid = (unsigned long) scpnt->host_scribble; 178 int retval = SUCCESS, ret; 179 int retry = 3; 180 char *dbf_tag; 181 182 /* avoid race condition between late normal completion and abort */ 183 write_lock_irqsave(&adapter->abort_lock, flags); 184 185 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); 186 if (!old_req) { 187 write_unlock_irqrestore(&adapter->abort_lock, flags); 188 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); 189 return FAILED; /* completion could be in progress */ 190 } 191 old_req->data = NULL; 192 193 /* don't access old fsf_req after releasing the abort_lock */ 194 write_unlock_irqrestore(&adapter->abort_lock, flags); 195 196 while (retry--) { 197 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); 198 if (abrt_req) 199 break; 200 201 zfcp_erp_wait(adapter); 202 ret = fc_block_scsi_eh(scpnt); 203 if (ret) { 204 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); 205 return ret; 206 } 207 if (!(atomic_read(&adapter->status) & 208 ZFCP_STATUS_COMMON_RUNNING)) { 209 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); 210 return SUCCESS; 211 } 212 } 213 if (!abrt_req) { 214 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); 215 return FAILED; 216 } 217 218 wait_for_completion(&abrt_req->completion); 219 220 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) 221 dbf_tag = "abrt_ok"; 222 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) 223 dbf_tag = "abrt_nn"; 224 else { 225 dbf_tag = "abrt_fa"; 226 retval = FAILED; 227 } 228 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); 229 zfcp_fsf_req_free(abrt_req); 230 return retval; 231 } 232 233 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) 234 { 235 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 236 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 237 struct zfcp_fsf_req *fsf_req = NULL; 238 int retval = SUCCESS, ret; 239 int retry = 3; 240 241 while (retry--) { 242 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); 243 if (fsf_req) 244 break; 245 246 zfcp_erp_wait(adapter); 247 ret = fc_block_scsi_eh(scpnt); 248 if (ret) 249 return ret; 250 251 if (!(atomic_read(&adapter->status) & 252 ZFCP_STATUS_COMMON_RUNNING)) { 253 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); 254 return SUCCESS; 255 } 256 } 257 if (!fsf_req) 258 return FAILED; 259 260 wait_for_completion(&fsf_req->completion); 261 262 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 263 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); 264 retval = FAILED; 265 } else 266 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); 267 268 zfcp_fsf_req_free(fsf_req); 269 return retval; 270 } 271 272 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) 273 { 274 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); 275 } 276 277 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) 278 { 279 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); 280 } 281 282 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 283 { 284 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 285 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 286 int ret; 287 288 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); 289 zfcp_erp_wait(adapter); 290 ret = fc_block_scsi_eh(scpnt); 291 if (ret) 292 return ret; 293 294 return SUCCESS; 295 } 296 297 struct scsi_transport_template *zfcp_scsi_transport_template; 298 299 static struct scsi_host_template zfcp_scsi_host_template = { 300 .module = THIS_MODULE, 301 .name = "zfcp", 302 .queuecommand = zfcp_scsi_queuecommand, 303 .eh_abort_handler = zfcp_scsi_eh_abort_handler, 304 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, 305 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, 306 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, 307 .slave_alloc = zfcp_scsi_slave_alloc, 308 .slave_configure = zfcp_scsi_slave_configure, 309 .slave_destroy = zfcp_scsi_slave_destroy, 310 .change_queue_depth = zfcp_scsi_change_queue_depth, 311 .proc_name = "zfcp", 312 .can_queue = 4096, 313 .this_id = -1, 314 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 315 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), 316 /* GCD, adjusted later */ 317 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 318 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, 319 /* GCD, adjusted later */ 320 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, 321 .cmd_per_lun = 1, 322 .use_clustering = 1, 323 .shost_attrs = zfcp_sysfs_shost_attrs, 324 .sdev_attrs = zfcp_sysfs_sdev_attrs, 325 }; 326 327 /** 328 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer 329 * @adapter: The zfcp adapter to register with the SCSI midlayer 330 */ 331 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) 332 { 333 struct ccw_dev_id dev_id; 334 335 if (adapter->scsi_host) 336 return 0; 337 338 ccw_device_get_id(adapter->ccw_device, &dev_id); 339 /* register adapter as SCSI host with mid layer of SCSI stack */ 340 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, 341 sizeof (struct zfcp_adapter *)); 342 if (!adapter->scsi_host) { 343 dev_err(&adapter->ccw_device->dev, 344 "Registering the FCP device with the " 345 "SCSI stack failed\n"); 346 return -EIO; 347 } 348 349 /* tell the SCSI stack some characteristics of this adapter */ 350 adapter->scsi_host->max_id = 511; 351 adapter->scsi_host->max_lun = 0xFFFFFFFF; 352 adapter->scsi_host->max_channel = 0; 353 adapter->scsi_host->unique_id = dev_id.devno; 354 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ 355 adapter->scsi_host->transportt = zfcp_scsi_transport_template; 356 357 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 358 359 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 360 scsi_host_put(adapter->scsi_host); 361 return -EIO; 362 } 363 364 return 0; 365 } 366 367 /** 368 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer 369 * @adapter: The zfcp adapter to unregister. 370 */ 371 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) 372 { 373 struct Scsi_Host *shost; 374 struct zfcp_port *port; 375 376 shost = adapter->scsi_host; 377 if (!shost) 378 return; 379 380 read_lock_irq(&adapter->port_list_lock); 381 list_for_each_entry(port, &adapter->port_list, list) 382 port->rport = NULL; 383 read_unlock_irq(&adapter->port_list_lock); 384 385 fc_remove_host(shost); 386 scsi_remove_host(shost); 387 scsi_host_put(shost); 388 adapter->scsi_host = NULL; 389 } 390 391 static struct fc_host_statistics* 392 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 393 { 394 struct fc_host_statistics *fc_stats; 395 396 if (!adapter->fc_stats) { 397 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); 398 if (!fc_stats) 399 return NULL; 400 adapter->fc_stats = fc_stats; /* freed in adapter_release */ 401 } 402 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); 403 return adapter->fc_stats; 404 } 405 406 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 407 struct fsf_qtcb_bottom_port *data, 408 struct fsf_qtcb_bottom_port *old) 409 { 410 fc_stats->seconds_since_last_reset = 411 data->seconds_since_last_reset - old->seconds_since_last_reset; 412 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 413 fc_stats->tx_words = data->tx_words - old->tx_words; 414 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 415 fc_stats->rx_words = data->rx_words - old->rx_words; 416 fc_stats->lip_count = data->lip - old->lip; 417 fc_stats->nos_count = data->nos - old->nos; 418 fc_stats->error_frames = data->error_frames - old->error_frames; 419 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 420 fc_stats->link_failure_count = data->link_failure - old->link_failure; 421 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 422 fc_stats->loss_of_signal_count = 423 data->loss_of_signal - old->loss_of_signal; 424 fc_stats->prim_seq_protocol_err_count = 425 data->psp_error_counts - old->psp_error_counts; 426 fc_stats->invalid_tx_word_count = 427 data->invalid_tx_words - old->invalid_tx_words; 428 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 429 fc_stats->fcp_input_requests = 430 data->input_requests - old->input_requests; 431 fc_stats->fcp_output_requests = 432 data->output_requests - old->output_requests; 433 fc_stats->fcp_control_requests = 434 data->control_requests - old->control_requests; 435 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 436 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 437 } 438 439 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 440 struct fsf_qtcb_bottom_port *data) 441 { 442 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 443 fc_stats->tx_frames = data->tx_frames; 444 fc_stats->tx_words = data->tx_words; 445 fc_stats->rx_frames = data->rx_frames; 446 fc_stats->rx_words = data->rx_words; 447 fc_stats->lip_count = data->lip; 448 fc_stats->nos_count = data->nos; 449 fc_stats->error_frames = data->error_frames; 450 fc_stats->dumped_frames = data->dumped_frames; 451 fc_stats->link_failure_count = data->link_failure; 452 fc_stats->loss_of_sync_count = data->loss_of_sync; 453 fc_stats->loss_of_signal_count = data->loss_of_signal; 454 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; 455 fc_stats->invalid_tx_word_count = data->invalid_tx_words; 456 fc_stats->invalid_crc_count = data->invalid_crcs; 457 fc_stats->fcp_input_requests = data->input_requests; 458 fc_stats->fcp_output_requests = data->output_requests; 459 fc_stats->fcp_control_requests = data->control_requests; 460 fc_stats->fcp_input_megabytes = data->input_mb; 461 fc_stats->fcp_output_megabytes = data->output_mb; 462 } 463 464 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) 465 { 466 struct zfcp_adapter *adapter; 467 struct fc_host_statistics *fc_stats; 468 struct fsf_qtcb_bottom_port *data; 469 int ret; 470 471 adapter = (struct zfcp_adapter *)host->hostdata[0]; 472 fc_stats = zfcp_init_fc_host_stats(adapter); 473 if (!fc_stats) 474 return NULL; 475 476 data = kzalloc(sizeof(*data), GFP_KERNEL); 477 if (!data) 478 return NULL; 479 480 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 481 if (ret) { 482 kfree(data); 483 return NULL; 484 } 485 486 if (adapter->stats_reset && 487 ((jiffies/HZ - adapter->stats_reset) < 488 data->seconds_since_last_reset)) 489 zfcp_adjust_fc_host_stats(fc_stats, data, 490 adapter->stats_reset_data); 491 else 492 zfcp_set_fc_host_stats(fc_stats, data); 493 494 kfree(data); 495 return fc_stats; 496 } 497 498 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 499 { 500 struct zfcp_adapter *adapter; 501 struct fsf_qtcb_bottom_port *data; 502 int ret; 503 504 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 505 data = kzalloc(sizeof(*data), GFP_KERNEL); 506 if (!data) 507 return; 508 509 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 510 if (ret) 511 kfree(data); 512 else { 513 adapter->stats_reset = jiffies/HZ; 514 kfree(adapter->stats_reset_data); 515 adapter->stats_reset_data = data; /* finally freed in 516 adapter_release */ 517 } 518 } 519 520 static void zfcp_get_host_port_state(struct Scsi_Host *shost) 521 { 522 struct zfcp_adapter *adapter = 523 (struct zfcp_adapter *)shost->hostdata[0]; 524 int status = atomic_read(&adapter->status); 525 526 if ((status & ZFCP_STATUS_COMMON_RUNNING) && 527 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) 528 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 529 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 530 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 531 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) 532 fc_host_port_state(shost) = FC_PORTSTATE_ERROR; 533 else 534 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 535 } 536 537 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 538 { 539 rport->dev_loss_tmo = timeout; 540 } 541 542 /** 543 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport 544 * @rport: The FC rport where to teminate I/O 545 * 546 * Abort all pending SCSI commands for a port by closing the 547 * port. Using a reopen avoids a conflict with a shutdown 548 * overwriting a reopen. The "forced" ensures that a disappeared port 549 * is not opened again as valid due to the cached plogi data in 550 * non-NPIV mode. 551 */ 552 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) 553 { 554 struct zfcp_port *port; 555 struct Scsi_Host *shost = rport_to_shost(rport); 556 struct zfcp_adapter *adapter = 557 (struct zfcp_adapter *)shost->hostdata[0]; 558 559 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 560 561 if (port) { 562 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); 563 put_device(&port->dev); 564 } 565 } 566 567 static void zfcp_scsi_rport_register(struct zfcp_port *port) 568 { 569 struct fc_rport_identifiers ids; 570 struct fc_rport *rport; 571 572 if (port->rport) 573 return; 574 575 ids.node_name = port->wwnn; 576 ids.port_name = port->wwpn; 577 ids.port_id = port->d_id; 578 ids.roles = FC_RPORT_ROLE_FCP_TARGET; 579 580 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); 581 if (!rport) { 582 dev_err(&port->adapter->ccw_device->dev, 583 "Registering port 0x%016Lx failed\n", 584 (unsigned long long)port->wwpn); 585 return; 586 } 587 588 rport->maxframe_size = port->maxframe_size; 589 rport->supported_classes = port->supported_classes; 590 port->rport = rport; 591 port->starget_id = rport->scsi_target_id; 592 593 zfcp_unit_queue_scsi_scan(port); 594 } 595 596 static void zfcp_scsi_rport_block(struct zfcp_port *port) 597 { 598 struct fc_rport *rport = port->rport; 599 600 if (rport) { 601 fc_remote_port_delete(rport); 602 port->rport = NULL; 603 } 604 } 605 606 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) 607 { 608 get_device(&port->dev); 609 port->rport_task = RPORT_ADD; 610 611 if (!queue_work(port->adapter->work_queue, &port->rport_work)) 612 put_device(&port->dev); 613 } 614 615 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) 616 { 617 get_device(&port->dev); 618 port->rport_task = RPORT_DEL; 619 620 if (port->rport && queue_work(port->adapter->work_queue, 621 &port->rport_work)) 622 return; 623 624 put_device(&port->dev); 625 } 626 627 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) 628 { 629 unsigned long flags; 630 struct zfcp_port *port; 631 632 read_lock_irqsave(&adapter->port_list_lock, flags); 633 list_for_each_entry(port, &adapter->port_list, list) 634 zfcp_scsi_schedule_rport_block(port); 635 read_unlock_irqrestore(&adapter->port_list_lock, flags); 636 } 637 638 void zfcp_scsi_rport_work(struct work_struct *work) 639 { 640 struct zfcp_port *port = container_of(work, struct zfcp_port, 641 rport_work); 642 643 while (port->rport_task) { 644 if (port->rport_task == RPORT_ADD) { 645 port->rport_task = RPORT_NONE; 646 zfcp_scsi_rport_register(port); 647 } else { 648 port->rport_task = RPORT_NONE; 649 zfcp_scsi_rport_block(port); 650 } 651 } 652 653 put_device(&port->dev); 654 } 655 656 /** 657 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host 658 * @adapter: The adapter where to configure DIF/DIX for the SCSI host 659 */ 660 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) 661 { 662 unsigned int mask = 0; 663 unsigned int data_div; 664 struct Scsi_Host *shost = adapter->scsi_host; 665 666 data_div = atomic_read(&adapter->status) & 667 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; 668 669 if (enable_dif && 670 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) 671 mask |= SHOST_DIF_TYPE1_PROTECTION; 672 673 if (enable_dif && data_div && 674 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { 675 mask |= SHOST_DIX_TYPE1_PROTECTION; 676 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); 677 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; 678 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; 679 shost->max_sectors = shost->sg_tablesize * 8; 680 } 681 682 scsi_host_set_prot(shost, mask); 683 } 684 685 /** 686 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error 687 * @scmd: The SCSI command to report the error for 688 * @ascq: The ASCQ to put in the sense buffer 689 * 690 * See the error handling in sd_done for the sense codes used here. 691 * Set DID_SOFT_ERROR to retry the request, if possible. 692 */ 693 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) 694 { 695 scsi_build_sense_buffer(1, scmd->sense_buffer, 696 ILLEGAL_REQUEST, 0x10, ascq); 697 set_driver_byte(scmd, DRIVER_SENSE); 698 scmd->result |= SAM_STAT_CHECK_CONDITION; 699 set_host_byte(scmd, DID_SOFT_ERROR); 700 } 701 702 struct fc_function_template zfcp_transport_functions = { 703 .show_starget_port_id = 1, 704 .show_starget_port_name = 1, 705 .show_starget_node_name = 1, 706 .show_rport_supported_classes = 1, 707 .show_rport_maxframe_size = 1, 708 .show_rport_dev_loss_tmo = 1, 709 .show_host_node_name = 1, 710 .show_host_port_name = 1, 711 .show_host_permanent_port_name = 1, 712 .show_host_supported_classes = 1, 713 .show_host_supported_fc4s = 1, 714 .show_host_supported_speeds = 1, 715 .show_host_maxframe_size = 1, 716 .show_host_serial_number = 1, 717 .get_fc_host_stats = zfcp_get_fc_host_stats, 718 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 719 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 720 .get_host_port_state = zfcp_get_host_port_state, 721 .terminate_rport_io = zfcp_scsi_terminate_rport_io, 722 .show_host_port_state = 1, 723 .show_host_active_fc4s = 1, 724 .bsg_request = zfcp_fc_exec_bsg_job, 725 .bsg_timeout = zfcp_fc_timeout_bsg_job, 726 /* no functions registered for following dynamic attributes but 727 directly set by LLDD */ 728 .show_host_port_type = 1, 729 .show_host_symbolic_name = 1, 730 .show_host_speed = 1, 731 .show_host_port_id = 1, 732 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), 733 }; 734