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