1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * zfcp device driver 4 * 5 * Interface to Linux SCSI midlayer. 6 * 7 * Copyright IBM Corp. 2002, 2017 8 */ 9 10 #define KMSG_COMPONENT "zfcp" 11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13 #include <linux/module.h> 14 #include <linux/types.h> 15 #include <linux/slab.h> 16 #include <scsi/fc/fc_fcp.h> 17 #include <scsi/scsi_eh.h> 18 #include <linux/atomic.h> 19 #include "zfcp_ext.h" 20 #include "zfcp_dbf.h" 21 #include "zfcp_fc.h" 22 #include "zfcp_reqlist.h" 23 24 static unsigned int default_depth = 32; 25 module_param_named(queue_depth, default_depth, uint, 0600); 26 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); 27 28 static bool enable_dif; 29 module_param_named(dif, enable_dif, bool, 0400); 30 MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); 31 32 static bool allow_lun_scan = true; 33 module_param(allow_lun_scan, bool, 0600); 34 MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); 35 36 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) 37 { 38 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 39 40 /* if previous slave_alloc returned early, there is nothing to do */ 41 if (!zfcp_sdev->port) 42 return; 43 44 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); 45 put_device(&zfcp_sdev->port->dev); 46 } 47 48 static int zfcp_scsi_slave_configure(struct scsi_device *sdp) 49 { 50 if (sdp->tagged_supported) 51 scsi_change_queue_depth(sdp, default_depth); 52 return 0; 53 } 54 55 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) 56 { 57 set_host_byte(scpnt, result); 58 zfcp_dbf_scsi_fail_send(scpnt); 59 scpnt->scsi_done(scpnt); 60 } 61 62 static 63 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) 64 { 65 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 66 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); 67 int status, scsi_result, ret; 68 69 /* reset the status for this request */ 70 scpnt->result = 0; 71 scpnt->host_scribble = NULL; 72 73 scsi_result = fc_remote_port_chkready(rport); 74 if (unlikely(scsi_result)) { 75 scpnt->result = scsi_result; 76 zfcp_dbf_scsi_fail_send(scpnt); 77 scpnt->scsi_done(scpnt); 78 return 0; 79 } 80 81 status = atomic_read(&zfcp_sdev->status); 82 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && 83 !(atomic_read(&zfcp_sdev->port->status) & 84 ZFCP_STATUS_COMMON_ERP_FAILED)) { 85 /* only LUN access denied, but port is good 86 * not covered by FC transport, have to fail here */ 87 zfcp_scsi_command_fail(scpnt, DID_ERROR); 88 return 0; 89 } 90 91 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { 92 /* This could be 93 * call to rport_delete pending: mimic retry from 94 * fc_remote_port_chkready until rport is BLOCKED 95 */ 96 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); 97 return 0; 98 } 99 100 ret = zfcp_fsf_fcp_cmnd(scpnt); 101 if (unlikely(ret == -EBUSY)) 102 return SCSI_MLQUEUE_DEVICE_BUSY; 103 else if (unlikely(ret < 0)) 104 return SCSI_MLQUEUE_HOST_BUSY; 105 106 return ret; 107 } 108 109 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) 110 { 111 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 112 struct zfcp_adapter *adapter = 113 (struct zfcp_adapter *) sdev->host->hostdata[0]; 114 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 115 struct zfcp_port *port; 116 struct zfcp_unit *unit; 117 int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; 118 119 zfcp_sdev->erp_action.adapter = adapter; 120 zfcp_sdev->erp_action.sdev = sdev; 121 122 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 123 if (!port) 124 return -ENXIO; 125 126 zfcp_sdev->erp_action.port = port; 127 128 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); 129 if (unit) 130 put_device(&unit->dev); 131 132 if (!unit && !(allow_lun_scan && npiv)) { 133 put_device(&port->dev); 134 return -ENXIO; 135 } 136 137 zfcp_sdev->port = port; 138 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; 139 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; 140 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; 141 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; 142 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; 143 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; 144 spin_lock_init(&zfcp_sdev->latencies.lock); 145 146 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); 147 zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); 148 zfcp_erp_wait(port->adapter); 149 150 return 0; 151 } 152 153 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 154 { 155 struct Scsi_Host *scsi_host = scpnt->device->host; 156 struct zfcp_adapter *adapter = 157 (struct zfcp_adapter *) scsi_host->hostdata[0]; 158 struct zfcp_fsf_req *old_req, *abrt_req; 159 unsigned long flags; 160 unsigned long old_reqid = (unsigned long) scpnt->host_scribble; 161 int retval = SUCCESS, ret; 162 int retry = 3; 163 char *dbf_tag; 164 165 /* avoid race condition between late normal completion and abort */ 166 write_lock_irqsave(&adapter->abort_lock, flags); 167 168 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); 169 if (!old_req) { 170 write_unlock_irqrestore(&adapter->abort_lock, flags); 171 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); 172 return FAILED; /* completion could be in progress */ 173 } 174 old_req->data = NULL; 175 176 /* don't access old fsf_req after releasing the abort_lock */ 177 write_unlock_irqrestore(&adapter->abort_lock, flags); 178 179 while (retry--) { 180 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); 181 if (abrt_req) 182 break; 183 184 zfcp_erp_wait(adapter); 185 ret = fc_block_scsi_eh(scpnt); 186 if (ret) { 187 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); 188 return ret; 189 } 190 if (!(atomic_read(&adapter->status) & 191 ZFCP_STATUS_COMMON_RUNNING)) { 192 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); 193 return SUCCESS; 194 } 195 } 196 if (!abrt_req) { 197 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); 198 return FAILED; 199 } 200 201 wait_for_completion(&abrt_req->completion); 202 203 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) 204 dbf_tag = "abrt_ok"; 205 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) 206 dbf_tag = "abrt_nn"; 207 else { 208 dbf_tag = "abrt_fa"; 209 retval = FAILED; 210 } 211 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); 212 zfcp_fsf_req_free(abrt_req); 213 return retval; 214 } 215 216 struct zfcp_scsi_req_filter { 217 u8 tmf_scope; 218 u32 lun_handle; 219 u32 port_handle; 220 }; 221 222 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data) 223 { 224 struct zfcp_scsi_req_filter *filter = 225 (struct zfcp_scsi_req_filter *)data; 226 227 /* already aborted - prevent side-effects - or not a SCSI command */ 228 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND) 229 return; 230 231 /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */ 232 if (old_req->qtcb->header.port_handle != filter->port_handle) 233 return; 234 235 if (filter->tmf_scope == FCP_TMF_LUN_RESET && 236 old_req->qtcb->header.lun_handle != filter->lun_handle) 237 return; 238 239 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req); 240 old_req->data = NULL; 241 } 242 243 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags) 244 { 245 struct zfcp_adapter *adapter = zsdev->port->adapter; 246 struct zfcp_scsi_req_filter filter = { 247 .tmf_scope = FCP_TMF_TGT_RESET, 248 .port_handle = zsdev->port->handle, 249 }; 250 unsigned long flags; 251 252 if (tm_flags == FCP_TMF_LUN_RESET) { 253 filter.tmf_scope = FCP_TMF_LUN_RESET; 254 filter.lun_handle = zsdev->lun_handle; 255 } 256 257 /* 258 * abort_lock secures against other processings - in the abort-function 259 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data 260 */ 261 write_lock_irqsave(&adapter->abort_lock, flags); 262 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd, 263 &filter); 264 write_unlock_irqrestore(&adapter->abort_lock, flags); 265 } 266 267 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) 268 { 269 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 270 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 271 struct zfcp_fsf_req *fsf_req = NULL; 272 int retval = SUCCESS, ret; 273 int retry = 3; 274 275 while (retry--) { 276 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); 277 if (fsf_req) 278 break; 279 280 zfcp_erp_wait(adapter); 281 ret = fc_block_scsi_eh(scpnt); 282 if (ret) { 283 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL); 284 return ret; 285 } 286 287 if (!(atomic_read(&adapter->status) & 288 ZFCP_STATUS_COMMON_RUNNING)) { 289 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL); 290 return SUCCESS; 291 } 292 } 293 if (!fsf_req) { 294 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL); 295 return FAILED; 296 } 297 298 wait_for_completion(&fsf_req->completion); 299 300 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 301 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req); 302 retval = FAILED; 303 } else { 304 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req); 305 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags); 306 } 307 308 zfcp_fsf_req_free(fsf_req); 309 return retval; 310 } 311 312 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) 313 { 314 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); 315 } 316 317 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) 318 { 319 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); 320 } 321 322 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 323 { 324 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); 325 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 326 int ret; 327 328 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); 329 zfcp_erp_wait(adapter); 330 ret = fc_block_scsi_eh(scpnt); 331 if (ret) 332 return ret; 333 334 return SUCCESS; 335 } 336 337 struct scsi_transport_template *zfcp_scsi_transport_template; 338 339 static struct scsi_host_template zfcp_scsi_host_template = { 340 .module = THIS_MODULE, 341 .name = "zfcp", 342 .queuecommand = zfcp_scsi_queuecommand, 343 .eh_timed_out = fc_eh_timed_out, 344 .eh_abort_handler = zfcp_scsi_eh_abort_handler, 345 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, 346 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, 347 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, 348 .slave_alloc = zfcp_scsi_slave_alloc, 349 .slave_configure = zfcp_scsi_slave_configure, 350 .slave_destroy = zfcp_scsi_slave_destroy, 351 .change_queue_depth = scsi_change_queue_depth, 352 .proc_name = "zfcp", 353 .can_queue = 4096, 354 .this_id = -1, 355 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 356 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), 357 /* GCD, adjusted later */ 358 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 359 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, 360 /* GCD, adjusted later */ 361 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, 362 .use_clustering = 1, 363 .shost_attrs = zfcp_sysfs_shost_attrs, 364 .sdev_attrs = zfcp_sysfs_sdev_attrs, 365 .track_queue_depth = 1, 366 }; 367 368 /** 369 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer 370 * @adapter: The zfcp adapter to register with the SCSI midlayer 371 */ 372 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) 373 { 374 struct ccw_dev_id dev_id; 375 376 if (adapter->scsi_host) 377 return 0; 378 379 ccw_device_get_id(adapter->ccw_device, &dev_id); 380 /* register adapter as SCSI host with mid layer of SCSI stack */ 381 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, 382 sizeof (struct zfcp_adapter *)); 383 if (!adapter->scsi_host) { 384 dev_err(&adapter->ccw_device->dev, 385 "Registering the FCP device with the " 386 "SCSI stack failed\n"); 387 return -EIO; 388 } 389 390 /* tell the SCSI stack some characteristics of this adapter */ 391 adapter->scsi_host->max_id = 511; 392 adapter->scsi_host->max_lun = 0xFFFFFFFF; 393 adapter->scsi_host->max_channel = 0; 394 adapter->scsi_host->unique_id = dev_id.devno; 395 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ 396 adapter->scsi_host->transportt = zfcp_scsi_transport_template; 397 398 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 399 400 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 401 scsi_host_put(adapter->scsi_host); 402 return -EIO; 403 } 404 405 return 0; 406 } 407 408 /** 409 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer 410 * @adapter: The zfcp adapter to unregister. 411 */ 412 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) 413 { 414 struct Scsi_Host *shost; 415 struct zfcp_port *port; 416 417 shost = adapter->scsi_host; 418 if (!shost) 419 return; 420 421 read_lock_irq(&adapter->port_list_lock); 422 list_for_each_entry(port, &adapter->port_list, list) 423 port->rport = NULL; 424 read_unlock_irq(&adapter->port_list_lock); 425 426 fc_remove_host(shost); 427 scsi_remove_host(shost); 428 scsi_host_put(shost); 429 adapter->scsi_host = NULL; 430 } 431 432 static struct fc_host_statistics* 433 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 434 { 435 struct fc_host_statistics *fc_stats; 436 437 if (!adapter->fc_stats) { 438 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); 439 if (!fc_stats) 440 return NULL; 441 adapter->fc_stats = fc_stats; /* freed in adapter_release */ 442 } 443 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); 444 return adapter->fc_stats; 445 } 446 447 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 448 struct fsf_qtcb_bottom_port *data, 449 struct fsf_qtcb_bottom_port *old) 450 { 451 fc_stats->seconds_since_last_reset = 452 data->seconds_since_last_reset - old->seconds_since_last_reset; 453 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 454 fc_stats->tx_words = data->tx_words - old->tx_words; 455 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 456 fc_stats->rx_words = data->rx_words - old->rx_words; 457 fc_stats->lip_count = data->lip - old->lip; 458 fc_stats->nos_count = data->nos - old->nos; 459 fc_stats->error_frames = data->error_frames - old->error_frames; 460 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 461 fc_stats->link_failure_count = data->link_failure - old->link_failure; 462 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 463 fc_stats->loss_of_signal_count = 464 data->loss_of_signal - old->loss_of_signal; 465 fc_stats->prim_seq_protocol_err_count = 466 data->psp_error_counts - old->psp_error_counts; 467 fc_stats->invalid_tx_word_count = 468 data->invalid_tx_words - old->invalid_tx_words; 469 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 470 fc_stats->fcp_input_requests = 471 data->input_requests - old->input_requests; 472 fc_stats->fcp_output_requests = 473 data->output_requests - old->output_requests; 474 fc_stats->fcp_control_requests = 475 data->control_requests - old->control_requests; 476 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 477 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 478 } 479 480 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 481 struct fsf_qtcb_bottom_port *data) 482 { 483 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 484 fc_stats->tx_frames = data->tx_frames; 485 fc_stats->tx_words = data->tx_words; 486 fc_stats->rx_frames = data->rx_frames; 487 fc_stats->rx_words = data->rx_words; 488 fc_stats->lip_count = data->lip; 489 fc_stats->nos_count = data->nos; 490 fc_stats->error_frames = data->error_frames; 491 fc_stats->dumped_frames = data->dumped_frames; 492 fc_stats->link_failure_count = data->link_failure; 493 fc_stats->loss_of_sync_count = data->loss_of_sync; 494 fc_stats->loss_of_signal_count = data->loss_of_signal; 495 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; 496 fc_stats->invalid_tx_word_count = data->invalid_tx_words; 497 fc_stats->invalid_crc_count = data->invalid_crcs; 498 fc_stats->fcp_input_requests = data->input_requests; 499 fc_stats->fcp_output_requests = data->output_requests; 500 fc_stats->fcp_control_requests = data->control_requests; 501 fc_stats->fcp_input_megabytes = data->input_mb; 502 fc_stats->fcp_output_megabytes = data->output_mb; 503 } 504 505 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) 506 { 507 struct zfcp_adapter *adapter; 508 struct fc_host_statistics *fc_stats; 509 struct fsf_qtcb_bottom_port *data; 510 int ret; 511 512 adapter = (struct zfcp_adapter *)host->hostdata[0]; 513 fc_stats = zfcp_init_fc_host_stats(adapter); 514 if (!fc_stats) 515 return NULL; 516 517 data = kzalloc(sizeof(*data), GFP_KERNEL); 518 if (!data) 519 return NULL; 520 521 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 522 if (ret) { 523 kfree(data); 524 return NULL; 525 } 526 527 if (adapter->stats_reset && 528 ((jiffies/HZ - adapter->stats_reset) < 529 data->seconds_since_last_reset)) 530 zfcp_adjust_fc_host_stats(fc_stats, data, 531 adapter->stats_reset_data); 532 else 533 zfcp_set_fc_host_stats(fc_stats, data); 534 535 kfree(data); 536 return fc_stats; 537 } 538 539 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) 540 { 541 struct zfcp_adapter *adapter; 542 struct fsf_qtcb_bottom_port *data; 543 int ret; 544 545 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 546 data = kzalloc(sizeof(*data), GFP_KERNEL); 547 if (!data) 548 return; 549 550 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); 551 if (ret) 552 kfree(data); 553 else { 554 adapter->stats_reset = jiffies/HZ; 555 kfree(adapter->stats_reset_data); 556 adapter->stats_reset_data = data; /* finally freed in 557 adapter_release */ 558 } 559 } 560 561 static void zfcp_get_host_port_state(struct Scsi_Host *shost) 562 { 563 struct zfcp_adapter *adapter = 564 (struct zfcp_adapter *)shost->hostdata[0]; 565 int status = atomic_read(&adapter->status); 566 567 if ((status & ZFCP_STATUS_COMMON_RUNNING) && 568 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) 569 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 570 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 571 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 572 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) 573 fc_host_port_state(shost) = FC_PORTSTATE_ERROR; 574 else 575 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 576 } 577 578 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 579 { 580 rport->dev_loss_tmo = timeout; 581 } 582 583 /** 584 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport 585 * @rport: The FC rport where to teminate I/O 586 * 587 * Abort all pending SCSI commands for a port by closing the 588 * port. Using a reopen avoids a conflict with a shutdown 589 * overwriting a reopen. The "forced" ensures that a disappeared port 590 * is not opened again as valid due to the cached plogi data in 591 * non-NPIV mode. 592 */ 593 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) 594 { 595 struct zfcp_port *port; 596 struct Scsi_Host *shost = rport_to_shost(rport); 597 struct zfcp_adapter *adapter = 598 (struct zfcp_adapter *)shost->hostdata[0]; 599 600 port = zfcp_get_port_by_wwpn(adapter, rport->port_name); 601 602 if (port) { 603 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); 604 put_device(&port->dev); 605 } 606 } 607 608 static void zfcp_scsi_rport_register(struct zfcp_port *port) 609 { 610 struct fc_rport_identifiers ids; 611 struct fc_rport *rport; 612 613 if (port->rport) 614 return; 615 616 ids.node_name = port->wwnn; 617 ids.port_name = port->wwpn; 618 ids.port_id = port->d_id; 619 ids.roles = FC_RPORT_ROLE_FCP_TARGET; 620 621 zfcp_dbf_rec_trig("scpaddy", port->adapter, port, NULL, 622 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD, 623 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD); 624 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); 625 if (!rport) { 626 dev_err(&port->adapter->ccw_device->dev, 627 "Registering port 0x%016Lx failed\n", 628 (unsigned long long)port->wwpn); 629 return; 630 } 631 632 rport->maxframe_size = port->maxframe_size; 633 rport->supported_classes = port->supported_classes; 634 port->rport = rport; 635 port->starget_id = rport->scsi_target_id; 636 637 zfcp_unit_queue_scsi_scan(port); 638 } 639 640 static void zfcp_scsi_rport_block(struct zfcp_port *port) 641 { 642 struct fc_rport *rport = port->rport; 643 644 if (rport) { 645 zfcp_dbf_rec_trig("scpdely", port->adapter, port, NULL, 646 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL, 647 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL); 648 fc_remote_port_delete(rport); 649 port->rport = NULL; 650 } 651 } 652 653 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) 654 { 655 get_device(&port->dev); 656 port->rport_task = RPORT_ADD; 657 658 if (!queue_work(port->adapter->work_queue, &port->rport_work)) 659 put_device(&port->dev); 660 } 661 662 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) 663 { 664 get_device(&port->dev); 665 port->rport_task = RPORT_DEL; 666 667 if (port->rport && queue_work(port->adapter->work_queue, 668 &port->rport_work)) 669 return; 670 671 put_device(&port->dev); 672 } 673 674 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) 675 { 676 unsigned long flags; 677 struct zfcp_port *port; 678 679 read_lock_irqsave(&adapter->port_list_lock, flags); 680 list_for_each_entry(port, &adapter->port_list, list) 681 zfcp_scsi_schedule_rport_block(port); 682 read_unlock_irqrestore(&adapter->port_list_lock, flags); 683 } 684 685 void zfcp_scsi_rport_work(struct work_struct *work) 686 { 687 struct zfcp_port *port = container_of(work, struct zfcp_port, 688 rport_work); 689 690 while (port->rport_task) { 691 if (port->rport_task == RPORT_ADD) { 692 port->rport_task = RPORT_NONE; 693 zfcp_scsi_rport_register(port); 694 } else { 695 port->rport_task = RPORT_NONE; 696 zfcp_scsi_rport_block(port); 697 } 698 } 699 700 put_device(&port->dev); 701 } 702 703 /** 704 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host 705 * @adapter: The adapter where to configure DIF/DIX for the SCSI host 706 */ 707 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) 708 { 709 unsigned int mask = 0; 710 unsigned int data_div; 711 struct Scsi_Host *shost = adapter->scsi_host; 712 713 data_div = atomic_read(&adapter->status) & 714 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; 715 716 if (enable_dif && 717 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) 718 mask |= SHOST_DIF_TYPE1_PROTECTION; 719 720 if (enable_dif && data_div && 721 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { 722 mask |= SHOST_DIX_TYPE1_PROTECTION; 723 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); 724 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; 725 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; 726 shost->max_sectors = shost->sg_tablesize * 8; 727 } 728 729 scsi_host_set_prot(shost, mask); 730 } 731 732 /** 733 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error 734 * @scmd: The SCSI command to report the error for 735 * @ascq: The ASCQ to put in the sense buffer 736 * 737 * See the error handling in sd_done for the sense codes used here. 738 * Set DID_SOFT_ERROR to retry the request, if possible. 739 */ 740 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) 741 { 742 scsi_build_sense_buffer(1, scmd->sense_buffer, 743 ILLEGAL_REQUEST, 0x10, ascq); 744 set_driver_byte(scmd, DRIVER_SENSE); 745 scmd->result |= SAM_STAT_CHECK_CONDITION; 746 set_host_byte(scmd, DID_SOFT_ERROR); 747 } 748 749 struct fc_function_template zfcp_transport_functions = { 750 .show_starget_port_id = 1, 751 .show_starget_port_name = 1, 752 .show_starget_node_name = 1, 753 .show_rport_supported_classes = 1, 754 .show_rport_maxframe_size = 1, 755 .show_rport_dev_loss_tmo = 1, 756 .show_host_node_name = 1, 757 .show_host_port_name = 1, 758 .show_host_permanent_port_name = 1, 759 .show_host_supported_classes = 1, 760 .show_host_supported_fc4s = 1, 761 .show_host_supported_speeds = 1, 762 .show_host_maxframe_size = 1, 763 .show_host_serial_number = 1, 764 .get_fc_host_stats = zfcp_get_fc_host_stats, 765 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 766 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 767 .get_host_port_state = zfcp_get_host_port_state, 768 .terminate_rport_io = zfcp_scsi_terminate_rport_io, 769 .show_host_port_state = 1, 770 .show_host_active_fc4s = 1, 771 .bsg_request = zfcp_fc_exec_bsg_job, 772 .bsg_timeout = zfcp_fc_timeout_bsg_job, 773 /* no functions registered for following dynamic attributes but 774 directly set by LLDD */ 775 .show_host_port_type = 1, 776 .show_host_symbolic_name = 1, 777 .show_host_speed = 1, 778 .show_host_port_id = 1, 779 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), 780 }; 781