1 // SPDX-License-Identifier: GPL-2.0
5 * Interface to Linux SCSI midlayer.
7 * Copyright IBM Corp. 2002, 2018
10 #define KMSG_COMPONENT "zfcp"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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>
22 #include "zfcp_reqlist.h"
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");
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");
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");
36 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
38 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
40 /* if previous slave_alloc returned early, there is nothing to do */
44 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
45 put_device(&zfcp_sdev->port->dev);
48 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
50 if (sdp->tagged_supported)
51 scsi_change_queue_depth(sdp, default_depth);
55 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
57 set_host_byte(scpnt, result);
58 zfcp_dbf_scsi_fail_send(scpnt);
59 scpnt->scsi_done(scpnt);
63 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
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;
69 /* reset the status for this request */
71 scpnt->host_scribble = NULL;
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);
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);
91 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
93 * call to rport_delete pending: mimic retry from
94 * fc_remote_port_chkready until rport is BLOCKED
96 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
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;
109 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
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;
119 zfcp_sdev->erp_action.adapter = adapter;
120 zfcp_sdev->erp_action.sdev = sdev;
122 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
126 zfcp_sdev->erp_action.port = port;
128 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
130 put_device(&unit->dev);
132 if (!unit && !(allow_lun_scan && npiv)) {
133 put_device(&port->dev);
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);
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);
153 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
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;
160 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
161 int retval = SUCCESS, ret;
165 /* avoid race condition between late normal completion and abort */
166 write_lock_irqsave(&adapter->abort_lock, flags);
168 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
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 */
174 old_req->data = NULL;
176 /* don't access old fsf_req after releasing the abort_lock */
177 write_unlock_irqrestore(&adapter->abort_lock, flags);
180 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
184 zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL);
185 zfcp_erp_wait(adapter);
186 ret = fc_block_scsi_eh(scpnt);
188 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
191 if (!(atomic_read(&adapter->status) &
192 ZFCP_STATUS_COMMON_RUNNING)) {
193 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
198 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
202 wait_for_completion(&abrt_req->completion);
204 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
206 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
212 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
213 zfcp_fsf_req_free(abrt_req);
217 struct zfcp_scsi_req_filter {
223 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
225 struct zfcp_scsi_req_filter *filter =
226 (struct zfcp_scsi_req_filter *)data;
228 /* already aborted - prevent side-effects - or not a SCSI command */
229 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
232 /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */
233 if (old_req->qtcb->header.port_handle != filter->port_handle)
236 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
237 old_req->qtcb->header.lun_handle != filter->lun_handle)
240 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
241 old_req->data = NULL;
244 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
246 struct zfcp_adapter *adapter = zsdev->port->adapter;
247 struct zfcp_scsi_req_filter filter = {
248 .tmf_scope = FCP_TMF_TGT_RESET,
249 .port_handle = zsdev->port->handle,
253 if (tm_flags == FCP_TMF_LUN_RESET) {
254 filter.tmf_scope = FCP_TMF_LUN_RESET;
255 filter.lun_handle = zsdev->lun_handle;
259 * abort_lock secures against other processings - in the abort-function
260 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
262 write_lock_irqsave(&adapter->abort_lock, flags);
263 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
265 write_unlock_irqrestore(&adapter->abort_lock, flags);
268 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
270 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
271 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
272 struct zfcp_fsf_req *fsf_req = NULL;
273 int retval = SUCCESS, ret;
277 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
281 zfcp_dbf_scsi_devreset("wait", scpnt, tm_flags, NULL);
282 zfcp_erp_wait(adapter);
283 ret = fc_block_scsi_eh(scpnt);
285 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
289 if (!(atomic_read(&adapter->status) &
290 ZFCP_STATUS_COMMON_RUNNING)) {
291 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL);
296 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
300 wait_for_completion(&fsf_req->completion);
302 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
303 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req);
306 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req);
307 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
310 zfcp_fsf_req_free(fsf_req);
314 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
316 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
319 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
321 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
324 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
326 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
327 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
328 int ret = SUCCESS, fc_ret;
330 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
331 zfcp_erp_wait(adapter);
332 fc_ret = fc_block_scsi_eh(scpnt);
336 zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
340 struct scsi_transport_template *zfcp_scsi_transport_template;
342 static struct scsi_host_template zfcp_scsi_host_template = {
343 .module = THIS_MODULE,
345 .queuecommand = zfcp_scsi_queuecommand,
346 .eh_timed_out = fc_eh_timed_out,
347 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
348 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
349 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
350 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
351 .slave_alloc = zfcp_scsi_slave_alloc,
352 .slave_configure = zfcp_scsi_slave_configure,
353 .slave_destroy = zfcp_scsi_slave_destroy,
354 .change_queue_depth = scsi_change_queue_depth,
358 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
359 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
360 /* GCD, adjusted later */
361 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
362 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
363 /* GCD, adjusted later */
364 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
366 .shost_attrs = zfcp_sysfs_shost_attrs,
367 .sdev_attrs = zfcp_sysfs_sdev_attrs,
368 .track_queue_depth = 1,
372 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
373 * @adapter: The zfcp adapter to register with the SCSI midlayer
375 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
377 struct ccw_dev_id dev_id;
379 if (adapter->scsi_host)
382 ccw_device_get_id(adapter->ccw_device, &dev_id);
383 /* register adapter as SCSI host with mid layer of SCSI stack */
384 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
385 sizeof (struct zfcp_adapter *));
386 if (!adapter->scsi_host) {
387 dev_err(&adapter->ccw_device->dev,
388 "Registering the FCP device with the "
389 "SCSI stack failed\n");
393 /* tell the SCSI stack some characteristics of this adapter */
394 adapter->scsi_host->max_id = 511;
395 adapter->scsi_host->max_lun = 0xFFFFFFFF;
396 adapter->scsi_host->max_channel = 0;
397 adapter->scsi_host->unique_id = dev_id.devno;
398 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
399 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
401 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
403 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
404 scsi_host_put(adapter->scsi_host);
412 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
413 * @adapter: The zfcp adapter to unregister.
415 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
417 struct Scsi_Host *shost;
418 struct zfcp_port *port;
420 shost = adapter->scsi_host;
424 read_lock_irq(&adapter->port_list_lock);
425 list_for_each_entry(port, &adapter->port_list, list)
427 read_unlock_irq(&adapter->port_list_lock);
429 fc_remove_host(shost);
430 scsi_remove_host(shost);
431 scsi_host_put(shost);
432 adapter->scsi_host = NULL;
435 static struct fc_host_statistics*
436 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
438 struct fc_host_statistics *fc_stats;
440 if (!adapter->fc_stats) {
441 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
444 adapter->fc_stats = fc_stats; /* freed in adapter_release */
446 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
447 return adapter->fc_stats;
450 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
451 struct fsf_qtcb_bottom_port *data,
452 struct fsf_qtcb_bottom_port *old)
454 fc_stats->seconds_since_last_reset =
455 data->seconds_since_last_reset - old->seconds_since_last_reset;
456 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
457 fc_stats->tx_words = data->tx_words - old->tx_words;
458 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
459 fc_stats->rx_words = data->rx_words - old->rx_words;
460 fc_stats->lip_count = data->lip - old->lip;
461 fc_stats->nos_count = data->nos - old->nos;
462 fc_stats->error_frames = data->error_frames - old->error_frames;
463 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
464 fc_stats->link_failure_count = data->link_failure - old->link_failure;
465 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
466 fc_stats->loss_of_signal_count =
467 data->loss_of_signal - old->loss_of_signal;
468 fc_stats->prim_seq_protocol_err_count =
469 data->psp_error_counts - old->psp_error_counts;
470 fc_stats->invalid_tx_word_count =
471 data->invalid_tx_words - old->invalid_tx_words;
472 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
473 fc_stats->fcp_input_requests =
474 data->input_requests - old->input_requests;
475 fc_stats->fcp_output_requests =
476 data->output_requests - old->output_requests;
477 fc_stats->fcp_control_requests =
478 data->control_requests - old->control_requests;
479 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
480 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
483 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
484 struct fsf_qtcb_bottom_port *data)
486 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
487 fc_stats->tx_frames = data->tx_frames;
488 fc_stats->tx_words = data->tx_words;
489 fc_stats->rx_frames = data->rx_frames;
490 fc_stats->rx_words = data->rx_words;
491 fc_stats->lip_count = data->lip;
492 fc_stats->nos_count = data->nos;
493 fc_stats->error_frames = data->error_frames;
494 fc_stats->dumped_frames = data->dumped_frames;
495 fc_stats->link_failure_count = data->link_failure;
496 fc_stats->loss_of_sync_count = data->loss_of_sync;
497 fc_stats->loss_of_signal_count = data->loss_of_signal;
498 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
499 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
500 fc_stats->invalid_crc_count = data->invalid_crcs;
501 fc_stats->fcp_input_requests = data->input_requests;
502 fc_stats->fcp_output_requests = data->output_requests;
503 fc_stats->fcp_control_requests = data->control_requests;
504 fc_stats->fcp_input_megabytes = data->input_mb;
505 fc_stats->fcp_output_megabytes = data->output_mb;
508 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
510 struct zfcp_adapter *adapter;
511 struct fc_host_statistics *fc_stats;
512 struct fsf_qtcb_bottom_port *data;
515 adapter = (struct zfcp_adapter *)host->hostdata[0];
516 fc_stats = zfcp_init_fc_host_stats(adapter);
520 data = kzalloc(sizeof(*data), GFP_KERNEL);
524 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
530 if (adapter->stats_reset &&
531 ((jiffies/HZ - adapter->stats_reset) <
532 data->seconds_since_last_reset))
533 zfcp_adjust_fc_host_stats(fc_stats, data,
534 adapter->stats_reset_data);
536 zfcp_set_fc_host_stats(fc_stats, data);
542 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
544 struct zfcp_adapter *adapter;
545 struct fsf_qtcb_bottom_port *data;
548 adapter = (struct zfcp_adapter *)shost->hostdata[0];
549 data = kzalloc(sizeof(*data), GFP_KERNEL);
553 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
557 adapter->stats_reset = jiffies/HZ;
558 kfree(adapter->stats_reset_data);
559 adapter->stats_reset_data = data; /* finally freed in
564 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
566 struct zfcp_adapter *adapter =
567 (struct zfcp_adapter *)shost->hostdata[0];
568 int status = atomic_read(&adapter->status);
570 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
571 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
572 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
573 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
574 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
575 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
576 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
578 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
581 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
583 rport->dev_loss_tmo = timeout;
587 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
588 * @rport: The FC rport where to teminate I/O
590 * Abort all pending SCSI commands for a port by closing the
591 * port. Using a reopen avoids a conflict with a shutdown
592 * overwriting a reopen. The "forced" ensures that a disappeared port
593 * is not opened again as valid due to the cached plogi data in
596 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
598 struct zfcp_port *port;
599 struct Scsi_Host *shost = rport_to_shost(rport);
600 struct zfcp_adapter *adapter =
601 (struct zfcp_adapter *)shost->hostdata[0];
603 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
606 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
607 put_device(&port->dev);
609 zfcp_erp_port_forced_no_port_dbf(
611 rport->port_name /* zfcp_scsi_rport_register */,
612 rport->port_id /* zfcp_scsi_rport_register */);
616 static void zfcp_scsi_rport_register(struct zfcp_port *port)
618 struct fc_rport_identifiers ids;
619 struct fc_rport *rport;
624 ids.node_name = port->wwnn;
625 ids.port_name = port->wwpn;
626 ids.port_id = port->d_id;
627 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
629 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
630 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
631 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
632 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
634 dev_err(&port->adapter->ccw_device->dev,
635 "Registering port 0x%016Lx failed\n",
636 (unsigned long long)port->wwpn);
640 rport->maxframe_size = port->maxframe_size;
641 rport->supported_classes = port->supported_classes;
643 port->starget_id = rport->scsi_target_id;
645 zfcp_unit_queue_scsi_scan(port);
648 static void zfcp_scsi_rport_block(struct zfcp_port *port)
650 struct fc_rport *rport = port->rport;
653 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
654 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
655 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
656 fc_remote_port_delete(rport);
661 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
663 get_device(&port->dev);
664 port->rport_task = RPORT_ADD;
666 if (!queue_work(port->adapter->work_queue, &port->rport_work))
667 put_device(&port->dev);
670 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
672 get_device(&port->dev);
673 port->rport_task = RPORT_DEL;
675 if (port->rport && queue_work(port->adapter->work_queue,
679 put_device(&port->dev);
682 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
685 struct zfcp_port *port;
687 read_lock_irqsave(&adapter->port_list_lock, flags);
688 list_for_each_entry(port, &adapter->port_list, list)
689 zfcp_scsi_schedule_rport_block(port);
690 read_unlock_irqrestore(&adapter->port_list_lock, flags);
693 void zfcp_scsi_rport_work(struct work_struct *work)
695 struct zfcp_port *port = container_of(work, struct zfcp_port,
698 while (port->rport_task) {
699 if (port->rport_task == RPORT_ADD) {
700 port->rport_task = RPORT_NONE;
701 zfcp_scsi_rport_register(port);
703 port->rport_task = RPORT_NONE;
704 zfcp_scsi_rport_block(port);
708 put_device(&port->dev);
712 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
713 * @adapter: The adapter where to configure DIF/DIX for the SCSI host
715 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
717 unsigned int mask = 0;
718 unsigned int data_div;
719 struct Scsi_Host *shost = adapter->scsi_host;
721 data_div = atomic_read(&adapter->status) &
722 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
725 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
726 mask |= SHOST_DIF_TYPE1_PROTECTION;
728 if (enable_dif && data_div &&
729 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
730 mask |= SHOST_DIX_TYPE1_PROTECTION;
731 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
732 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
733 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
734 shost->max_sectors = shost->sg_tablesize * 8;
737 scsi_host_set_prot(shost, mask);
741 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
742 * @scmd: The SCSI command to report the error for
743 * @ascq: The ASCQ to put in the sense buffer
745 * See the error handling in sd_done for the sense codes used here.
746 * Set DID_SOFT_ERROR to retry the request, if possible.
748 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
750 scsi_build_sense_buffer(1, scmd->sense_buffer,
751 ILLEGAL_REQUEST, 0x10, ascq);
752 set_driver_byte(scmd, DRIVER_SENSE);
753 scmd->result |= SAM_STAT_CHECK_CONDITION;
754 set_host_byte(scmd, DID_SOFT_ERROR);
757 struct fc_function_template zfcp_transport_functions = {
758 .show_starget_port_id = 1,
759 .show_starget_port_name = 1,
760 .show_starget_node_name = 1,
761 .show_rport_supported_classes = 1,
762 .show_rport_maxframe_size = 1,
763 .show_rport_dev_loss_tmo = 1,
764 .show_host_node_name = 1,
765 .show_host_port_name = 1,
766 .show_host_permanent_port_name = 1,
767 .show_host_supported_classes = 1,
768 .show_host_supported_fc4s = 1,
769 .show_host_supported_speeds = 1,
770 .show_host_maxframe_size = 1,
771 .show_host_serial_number = 1,
772 .get_fc_host_stats = zfcp_get_fc_host_stats,
773 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
774 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
775 .get_host_port_state = zfcp_get_host_port_state,
776 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
777 .show_host_port_state = 1,
778 .show_host_active_fc4s = 1,
779 .bsg_request = zfcp_fc_exec_bsg_job,
780 .bsg_timeout = zfcp_fc_timeout_bsg_job,
781 /* no functions registered for following dynamic attributes but
782 directly set by LLDD */
783 .show_host_port_type = 1,
784 .show_host_symbolic_name = 1,
785 .show_host_speed = 1,
786 .show_host_port_id = 1,
787 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),