4 * Interface to Linux SCSI midlayer.
6 * Copyright IBM Corp. 2002, 2017
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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>
21 #include "zfcp_reqlist.h"
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");
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");
31 static bool allow_lun_scan = true;
32 module_param(allow_lun_scan, bool, 0600);
33 MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs");
35 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
37 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
39 /* if previous slave_alloc returned early, there is nothing to do */
43 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
44 put_device(&zfcp_sdev->port->dev);
47 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
49 if (sdp->tagged_supported)
50 scsi_change_queue_depth(sdp, default_depth);
54 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
56 set_host_byte(scpnt, result);
57 zfcp_dbf_scsi_fail_send(scpnt);
58 scpnt->scsi_done(scpnt);
62 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
64 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
65 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
66 int status, scsi_result, ret;
68 /* reset the status for this request */
70 scpnt->host_scribble = NULL;
72 scsi_result = fc_remote_port_chkready(rport);
73 if (unlikely(scsi_result)) {
74 scpnt->result = scsi_result;
75 zfcp_dbf_scsi_fail_send(scpnt);
76 scpnt->scsi_done(scpnt);
80 status = atomic_read(&zfcp_sdev->status);
81 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
82 !(atomic_read(&zfcp_sdev->port->status) &
83 ZFCP_STATUS_COMMON_ERP_FAILED)) {
84 /* only LUN access denied, but port is good
85 * not covered by FC transport, have to fail here */
86 zfcp_scsi_command_fail(scpnt, DID_ERROR);
90 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
92 * call to rport_delete pending: mimic retry from
93 * fc_remote_port_chkready until rport is BLOCKED
95 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
99 ret = zfcp_fsf_fcp_cmnd(scpnt);
100 if (unlikely(ret == -EBUSY))
101 return SCSI_MLQUEUE_DEVICE_BUSY;
102 else if (unlikely(ret < 0))
103 return SCSI_MLQUEUE_HOST_BUSY;
108 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
110 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
111 struct zfcp_adapter *adapter =
112 (struct zfcp_adapter *) sdev->host->hostdata[0];
113 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
114 struct zfcp_port *port;
115 struct zfcp_unit *unit;
116 int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE;
118 zfcp_sdev->erp_action.adapter = adapter;
119 zfcp_sdev->erp_action.sdev = sdev;
121 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
125 zfcp_sdev->erp_action.port = port;
127 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
129 put_device(&unit->dev);
131 if (!unit && !(allow_lun_scan && npiv)) {
132 put_device(&port->dev);
136 zfcp_sdev->port = port;
137 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
138 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
139 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
140 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
141 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
142 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
143 spin_lock_init(&zfcp_sdev->latencies.lock);
145 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
146 zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
147 zfcp_erp_wait(port->adapter);
152 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
154 struct Scsi_Host *scsi_host = scpnt->device->host;
155 struct zfcp_adapter *adapter =
156 (struct zfcp_adapter *) scsi_host->hostdata[0];
157 struct zfcp_fsf_req *old_req, *abrt_req;
159 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
160 int retval = SUCCESS, ret;
164 /* avoid race condition between late normal completion and abort */
165 write_lock_irqsave(&adapter->abort_lock, flags);
167 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
169 write_unlock_irqrestore(&adapter->abort_lock, flags);
170 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
171 return FAILED; /* completion could be in progress */
173 old_req->data = NULL;
175 /* don't access old fsf_req after releasing the abort_lock */
176 write_unlock_irqrestore(&adapter->abort_lock, flags);
179 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
183 zfcp_erp_wait(adapter);
184 ret = fc_block_scsi_eh(scpnt);
186 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
189 if (!(atomic_read(&adapter->status) &
190 ZFCP_STATUS_COMMON_RUNNING)) {
191 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
196 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
200 wait_for_completion(&abrt_req->completion);
202 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
204 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
210 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
211 zfcp_fsf_req_free(abrt_req);
215 struct zfcp_scsi_req_filter {
221 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
223 struct zfcp_scsi_req_filter *filter =
224 (struct zfcp_scsi_req_filter *)data;
226 /* already aborted - prevent side-effects - or not a SCSI command */
227 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
230 /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */
231 if (old_req->qtcb->header.port_handle != filter->port_handle)
234 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
235 old_req->qtcb->header.lun_handle != filter->lun_handle)
238 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
239 old_req->data = NULL;
242 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
244 struct zfcp_adapter *adapter = zsdev->port->adapter;
245 struct zfcp_scsi_req_filter filter = {
246 .tmf_scope = FCP_TMF_TGT_RESET,
247 .port_handle = zsdev->port->handle,
251 if (tm_flags == FCP_TMF_LUN_RESET) {
252 filter.tmf_scope = FCP_TMF_LUN_RESET;
253 filter.lun_handle = zsdev->lun_handle;
257 * abort_lock secures against other processings - in the abort-function
258 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
260 write_lock_irqsave(&adapter->abort_lock, flags);
261 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
263 write_unlock_irqrestore(&adapter->abort_lock, flags);
266 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
268 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
269 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
270 struct zfcp_fsf_req *fsf_req = NULL;
271 int retval = SUCCESS, ret;
275 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
279 zfcp_erp_wait(adapter);
280 ret = fc_block_scsi_eh(scpnt);
282 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
286 if (!(atomic_read(&adapter->status) &
287 ZFCP_STATUS_COMMON_RUNNING)) {
288 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL);
293 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
297 wait_for_completion(&fsf_req->completion);
299 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
300 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req);
303 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req);
304 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
307 zfcp_fsf_req_free(fsf_req);
311 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
313 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
316 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
318 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
321 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
323 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
324 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
327 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
328 zfcp_erp_wait(adapter);
329 ret = fc_block_scsi_eh(scpnt);
336 struct scsi_transport_template *zfcp_scsi_transport_template;
338 static struct scsi_host_template zfcp_scsi_host_template = {
339 .module = THIS_MODULE,
341 .queuecommand = zfcp_scsi_queuecommand,
342 .eh_timed_out = fc_eh_timed_out,
343 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
344 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
345 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
346 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
347 .slave_alloc = zfcp_scsi_slave_alloc,
348 .slave_configure = zfcp_scsi_slave_configure,
349 .slave_destroy = zfcp_scsi_slave_destroy,
350 .change_queue_depth = scsi_change_queue_depth,
354 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
355 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
356 /* GCD, adjusted later */
357 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
358 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
359 /* GCD, adjusted later */
360 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
362 .shost_attrs = zfcp_sysfs_shost_attrs,
363 .sdev_attrs = zfcp_sysfs_sdev_attrs,
364 .track_queue_depth = 1,
368 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
369 * @adapter: The zfcp adapter to register with the SCSI midlayer
371 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
373 struct ccw_dev_id dev_id;
375 if (adapter->scsi_host)
378 ccw_device_get_id(adapter->ccw_device, &dev_id);
379 /* register adapter as SCSI host with mid layer of SCSI stack */
380 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
381 sizeof (struct zfcp_adapter *));
382 if (!adapter->scsi_host) {
383 dev_err(&adapter->ccw_device->dev,
384 "Registering the FCP device with the "
385 "SCSI stack failed\n");
389 /* tell the SCSI stack some characteristics of this adapter */
390 adapter->scsi_host->max_id = 511;
391 adapter->scsi_host->max_lun = 0xFFFFFFFF;
392 adapter->scsi_host->max_channel = 0;
393 adapter->scsi_host->unique_id = dev_id.devno;
394 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
395 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
397 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
399 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
400 scsi_host_put(adapter->scsi_host);
408 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
409 * @adapter: The zfcp adapter to unregister.
411 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
413 struct Scsi_Host *shost;
414 struct zfcp_port *port;
416 shost = adapter->scsi_host;
420 read_lock_irq(&adapter->port_list_lock);
421 list_for_each_entry(port, &adapter->port_list, list)
423 read_unlock_irq(&adapter->port_list_lock);
425 fc_remove_host(shost);
426 scsi_remove_host(shost);
427 scsi_host_put(shost);
428 adapter->scsi_host = NULL;
431 static struct fc_host_statistics*
432 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
434 struct fc_host_statistics *fc_stats;
436 if (!adapter->fc_stats) {
437 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
440 adapter->fc_stats = fc_stats; /* freed in adapter_release */
442 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
443 return adapter->fc_stats;
446 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
447 struct fsf_qtcb_bottom_port *data,
448 struct fsf_qtcb_bottom_port *old)
450 fc_stats->seconds_since_last_reset =
451 data->seconds_since_last_reset - old->seconds_since_last_reset;
452 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
453 fc_stats->tx_words = data->tx_words - old->tx_words;
454 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
455 fc_stats->rx_words = data->rx_words - old->rx_words;
456 fc_stats->lip_count = data->lip - old->lip;
457 fc_stats->nos_count = data->nos - old->nos;
458 fc_stats->error_frames = data->error_frames - old->error_frames;
459 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
460 fc_stats->link_failure_count = data->link_failure - old->link_failure;
461 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
462 fc_stats->loss_of_signal_count =
463 data->loss_of_signal - old->loss_of_signal;
464 fc_stats->prim_seq_protocol_err_count =
465 data->psp_error_counts - old->psp_error_counts;
466 fc_stats->invalid_tx_word_count =
467 data->invalid_tx_words - old->invalid_tx_words;
468 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
469 fc_stats->fcp_input_requests =
470 data->input_requests - old->input_requests;
471 fc_stats->fcp_output_requests =
472 data->output_requests - old->output_requests;
473 fc_stats->fcp_control_requests =
474 data->control_requests - old->control_requests;
475 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
476 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
479 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
480 struct fsf_qtcb_bottom_port *data)
482 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
483 fc_stats->tx_frames = data->tx_frames;
484 fc_stats->tx_words = data->tx_words;
485 fc_stats->rx_frames = data->rx_frames;
486 fc_stats->rx_words = data->rx_words;
487 fc_stats->lip_count = data->lip;
488 fc_stats->nos_count = data->nos;
489 fc_stats->error_frames = data->error_frames;
490 fc_stats->dumped_frames = data->dumped_frames;
491 fc_stats->link_failure_count = data->link_failure;
492 fc_stats->loss_of_sync_count = data->loss_of_sync;
493 fc_stats->loss_of_signal_count = data->loss_of_signal;
494 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
495 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
496 fc_stats->invalid_crc_count = data->invalid_crcs;
497 fc_stats->fcp_input_requests = data->input_requests;
498 fc_stats->fcp_output_requests = data->output_requests;
499 fc_stats->fcp_control_requests = data->control_requests;
500 fc_stats->fcp_input_megabytes = data->input_mb;
501 fc_stats->fcp_output_megabytes = data->output_mb;
504 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
506 struct zfcp_adapter *adapter;
507 struct fc_host_statistics *fc_stats;
508 struct fsf_qtcb_bottom_port *data;
511 adapter = (struct zfcp_adapter *)host->hostdata[0];
512 fc_stats = zfcp_init_fc_host_stats(adapter);
516 data = kzalloc(sizeof(*data), GFP_KERNEL);
520 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
526 if (adapter->stats_reset &&
527 ((jiffies/HZ - adapter->stats_reset) <
528 data->seconds_since_last_reset))
529 zfcp_adjust_fc_host_stats(fc_stats, data,
530 adapter->stats_reset_data);
532 zfcp_set_fc_host_stats(fc_stats, data);
538 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
540 struct zfcp_adapter *adapter;
541 struct fsf_qtcb_bottom_port *data;
544 adapter = (struct zfcp_adapter *)shost->hostdata[0];
545 data = kzalloc(sizeof(*data), GFP_KERNEL);
549 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
553 adapter->stats_reset = jiffies/HZ;
554 kfree(adapter->stats_reset_data);
555 adapter->stats_reset_data = data; /* finally freed in
560 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
562 struct zfcp_adapter *adapter =
563 (struct zfcp_adapter *)shost->hostdata[0];
564 int status = atomic_read(&adapter->status);
566 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
567 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
568 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
569 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
570 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
571 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
572 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
574 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
577 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
579 rport->dev_loss_tmo = timeout;
583 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
584 * @rport: The FC rport where to teminate I/O
586 * Abort all pending SCSI commands for a port by closing the
587 * port. Using a reopen avoids a conflict with a shutdown
588 * overwriting a reopen. The "forced" ensures that a disappeared port
589 * is not opened again as valid due to the cached plogi data in
592 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
594 struct zfcp_port *port;
595 struct Scsi_Host *shost = rport_to_shost(rport);
596 struct zfcp_adapter *adapter =
597 (struct zfcp_adapter *)shost->hostdata[0];
599 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
602 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
603 put_device(&port->dev);
607 static void zfcp_scsi_rport_register(struct zfcp_port *port)
609 struct fc_rport_identifiers ids;
610 struct fc_rport *rport;
615 ids.node_name = port->wwnn;
616 ids.port_name = port->wwpn;
617 ids.port_id = port->d_id;
618 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
620 zfcp_dbf_rec_trig("scpaddy", port->adapter, port, NULL,
621 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
622 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
623 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
625 dev_err(&port->adapter->ccw_device->dev,
626 "Registering port 0x%016Lx failed\n",
627 (unsigned long long)port->wwpn);
631 rport->maxframe_size = port->maxframe_size;
632 rport->supported_classes = port->supported_classes;
634 port->starget_id = rport->scsi_target_id;
636 zfcp_unit_queue_scsi_scan(port);
639 static void zfcp_scsi_rport_block(struct zfcp_port *port)
641 struct fc_rport *rport = port->rport;
644 zfcp_dbf_rec_trig("scpdely", port->adapter, port, NULL,
645 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
646 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
647 fc_remote_port_delete(rport);
652 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
654 get_device(&port->dev);
655 port->rport_task = RPORT_ADD;
657 if (!queue_work(port->adapter->work_queue, &port->rport_work))
658 put_device(&port->dev);
661 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
663 get_device(&port->dev);
664 port->rport_task = RPORT_DEL;
666 if (port->rport && queue_work(port->adapter->work_queue,
670 put_device(&port->dev);
673 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
676 struct zfcp_port *port;
678 read_lock_irqsave(&adapter->port_list_lock, flags);
679 list_for_each_entry(port, &adapter->port_list, list)
680 zfcp_scsi_schedule_rport_block(port);
681 read_unlock_irqrestore(&adapter->port_list_lock, flags);
684 void zfcp_scsi_rport_work(struct work_struct *work)
686 struct zfcp_port *port = container_of(work, struct zfcp_port,
689 while (port->rport_task) {
690 if (port->rport_task == RPORT_ADD) {
691 port->rport_task = RPORT_NONE;
692 zfcp_scsi_rport_register(port);
694 port->rport_task = RPORT_NONE;
695 zfcp_scsi_rport_block(port);
699 put_device(&port->dev);
703 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
704 * @adapter: The adapter where to configure DIF/DIX for the SCSI host
706 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
708 unsigned int mask = 0;
709 unsigned int data_div;
710 struct Scsi_Host *shost = adapter->scsi_host;
712 data_div = atomic_read(&adapter->status) &
713 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
716 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
717 mask |= SHOST_DIF_TYPE1_PROTECTION;
719 if (enable_dif && data_div &&
720 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
721 mask |= SHOST_DIX_TYPE1_PROTECTION;
722 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
723 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
724 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
725 shost->max_sectors = shost->sg_tablesize * 8;
728 scsi_host_set_prot(shost, mask);
732 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
733 * @scmd: The SCSI command to report the error for
734 * @ascq: The ASCQ to put in the sense buffer
736 * See the error handling in sd_done for the sense codes used here.
737 * Set DID_SOFT_ERROR to retry the request, if possible.
739 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
741 scsi_build_sense_buffer(1, scmd->sense_buffer,
742 ILLEGAL_REQUEST, 0x10, ascq);
743 set_driver_byte(scmd, DRIVER_SENSE);
744 scmd->result |= SAM_STAT_CHECK_CONDITION;
745 set_host_byte(scmd, DID_SOFT_ERROR);
748 struct fc_function_template zfcp_transport_functions = {
749 .show_starget_port_id = 1,
750 .show_starget_port_name = 1,
751 .show_starget_node_name = 1,
752 .show_rport_supported_classes = 1,
753 .show_rport_maxframe_size = 1,
754 .show_rport_dev_loss_tmo = 1,
755 .show_host_node_name = 1,
756 .show_host_port_name = 1,
757 .show_host_permanent_port_name = 1,
758 .show_host_supported_classes = 1,
759 .show_host_supported_fc4s = 1,
760 .show_host_supported_speeds = 1,
761 .show_host_maxframe_size = 1,
762 .show_host_serial_number = 1,
763 .get_fc_host_stats = zfcp_get_fc_host_stats,
764 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
765 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
766 .get_host_port_state = zfcp_get_host_port_state,
767 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
768 .show_host_port_state = 1,
769 .show_host_active_fc4s = 1,
770 .bsg_request = zfcp_fc_exec_bsg_job,
771 .bsg_timeout = zfcp_fc_timeout_bsg_job,
772 /* no functions registered for following dynamic attributes but
773 directly set by LLDD */
774 .show_host_port_type = 1,
775 .show_host_symbolic_name = 1,
776 .show_host_speed = 1,
777 .show_host_port_id = 1,
778 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),