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 mutex_lock(&zfcp_sysfs_port_units_mutex);
129 if (zfcp_sysfs_port_is_removing(port)) {
130 /* port is already gone */
131 mutex_unlock(&zfcp_sysfs_port_units_mutex);
132 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
135 mutex_unlock(&zfcp_sysfs_port_units_mutex);
137 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
139 put_device(&unit->dev);
141 if (!unit && !(allow_lun_scan && npiv)) {
142 put_device(&port->dev);
146 zfcp_sdev->port = port;
147 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
148 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
149 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
150 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
151 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
152 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
153 spin_lock_init(&zfcp_sdev->latencies.lock);
155 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
156 zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
157 zfcp_erp_wait(port->adapter);
162 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
164 struct Scsi_Host *scsi_host = scpnt->device->host;
165 struct zfcp_adapter *adapter =
166 (struct zfcp_adapter *) scsi_host->hostdata[0];
167 struct zfcp_fsf_req *old_req, *abrt_req;
169 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
170 int retval = SUCCESS, ret;
174 /* avoid race condition between late normal completion and abort */
175 write_lock_irqsave(&adapter->abort_lock, flags);
177 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
179 write_unlock_irqrestore(&adapter->abort_lock, flags);
180 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
181 return FAILED; /* completion could be in progress */
183 old_req->data = NULL;
185 /* don't access old fsf_req after releasing the abort_lock */
186 write_unlock_irqrestore(&adapter->abort_lock, flags);
189 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
193 zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL);
194 zfcp_erp_wait(adapter);
195 ret = fc_block_scsi_eh(scpnt);
197 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
200 if (!(atomic_read(&adapter->status) &
201 ZFCP_STATUS_COMMON_RUNNING)) {
202 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
207 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
211 wait_for_completion(&abrt_req->completion);
213 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
215 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
221 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
222 zfcp_fsf_req_free(abrt_req);
226 struct zfcp_scsi_req_filter {
232 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
234 struct zfcp_scsi_req_filter *filter =
235 (struct zfcp_scsi_req_filter *)data;
237 /* already aborted - prevent side-effects - or not a SCSI command */
238 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
241 /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */
242 if (old_req->qtcb->header.port_handle != filter->port_handle)
245 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
246 old_req->qtcb->header.lun_handle != filter->lun_handle)
249 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
250 old_req->data = NULL;
253 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
255 struct zfcp_adapter *adapter = zsdev->port->adapter;
256 struct zfcp_scsi_req_filter filter = {
257 .tmf_scope = FCP_TMF_TGT_RESET,
258 .port_handle = zsdev->port->handle,
262 if (tm_flags == FCP_TMF_LUN_RESET) {
263 filter.tmf_scope = FCP_TMF_LUN_RESET;
264 filter.lun_handle = zsdev->lun_handle;
268 * abort_lock secures against other processings - in the abort-function
269 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
271 write_lock_irqsave(&adapter->abort_lock, flags);
272 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
274 write_unlock_irqrestore(&adapter->abort_lock, flags);
277 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
279 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
280 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
281 struct zfcp_fsf_req *fsf_req = NULL;
282 int retval = SUCCESS, ret;
286 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
290 zfcp_dbf_scsi_devreset("wait", scpnt, tm_flags, NULL);
291 zfcp_erp_wait(adapter);
292 ret = fc_block_scsi_eh(scpnt);
294 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
298 if (!(atomic_read(&adapter->status) &
299 ZFCP_STATUS_COMMON_RUNNING)) {
300 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL);
305 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
309 wait_for_completion(&fsf_req->completion);
311 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
312 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req);
315 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req);
316 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
319 zfcp_fsf_req_free(fsf_req);
323 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
325 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
328 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
330 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
333 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
335 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
336 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
337 int ret = SUCCESS, fc_ret;
339 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) {
340 zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p");
341 zfcp_erp_wait(adapter);
343 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
344 zfcp_erp_wait(adapter);
345 fc_ret = fc_block_scsi_eh(scpnt);
349 zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
353 struct scsi_transport_template *zfcp_scsi_transport_template;
355 static struct scsi_host_template zfcp_scsi_host_template = {
356 .module = THIS_MODULE,
358 .queuecommand = zfcp_scsi_queuecommand,
359 .eh_timed_out = fc_eh_timed_out,
360 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
361 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
362 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
363 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
364 .slave_alloc = zfcp_scsi_slave_alloc,
365 .slave_configure = zfcp_scsi_slave_configure,
366 .slave_destroy = zfcp_scsi_slave_destroy,
367 .change_queue_depth = scsi_change_queue_depth,
371 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
372 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
373 /* GCD, adjusted later */
374 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
375 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
376 /* GCD, adjusted later */
377 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
379 .shost_attrs = zfcp_sysfs_shost_attrs,
380 .sdev_attrs = zfcp_sysfs_sdev_attrs,
381 .track_queue_depth = 1,
385 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
386 * @adapter: The zfcp adapter to register with the SCSI midlayer
388 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
390 struct ccw_dev_id dev_id;
392 if (adapter->scsi_host)
395 ccw_device_get_id(adapter->ccw_device, &dev_id);
396 /* register adapter as SCSI host with mid layer of SCSI stack */
397 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
398 sizeof (struct zfcp_adapter *));
399 if (!adapter->scsi_host) {
400 dev_err(&adapter->ccw_device->dev,
401 "Registering the FCP device with the "
402 "SCSI stack failed\n");
406 /* tell the SCSI stack some characteristics of this adapter */
407 adapter->scsi_host->max_id = 511;
408 adapter->scsi_host->max_lun = 0xFFFFFFFF;
409 adapter->scsi_host->max_channel = 0;
410 adapter->scsi_host->unique_id = dev_id.devno;
411 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
412 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
414 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
416 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
417 scsi_host_put(adapter->scsi_host);
425 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
426 * @adapter: The zfcp adapter to unregister.
428 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
430 struct Scsi_Host *shost;
431 struct zfcp_port *port;
433 shost = adapter->scsi_host;
437 read_lock_irq(&adapter->port_list_lock);
438 list_for_each_entry(port, &adapter->port_list, list)
440 read_unlock_irq(&adapter->port_list_lock);
442 fc_remove_host(shost);
443 scsi_remove_host(shost);
444 scsi_host_put(shost);
445 adapter->scsi_host = NULL;
448 static struct fc_host_statistics*
449 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
451 struct fc_host_statistics *fc_stats;
453 if (!adapter->fc_stats) {
454 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
457 adapter->fc_stats = fc_stats; /* freed in adapter_release */
459 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
460 return adapter->fc_stats;
463 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
464 struct fsf_qtcb_bottom_port *data,
465 struct fsf_qtcb_bottom_port *old)
467 fc_stats->seconds_since_last_reset =
468 data->seconds_since_last_reset - old->seconds_since_last_reset;
469 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
470 fc_stats->tx_words = data->tx_words - old->tx_words;
471 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
472 fc_stats->rx_words = data->rx_words - old->rx_words;
473 fc_stats->lip_count = data->lip - old->lip;
474 fc_stats->nos_count = data->nos - old->nos;
475 fc_stats->error_frames = data->error_frames - old->error_frames;
476 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
477 fc_stats->link_failure_count = data->link_failure - old->link_failure;
478 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
479 fc_stats->loss_of_signal_count =
480 data->loss_of_signal - old->loss_of_signal;
481 fc_stats->prim_seq_protocol_err_count =
482 data->psp_error_counts - old->psp_error_counts;
483 fc_stats->invalid_tx_word_count =
484 data->invalid_tx_words - old->invalid_tx_words;
485 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
486 fc_stats->fcp_input_requests =
487 data->input_requests - old->input_requests;
488 fc_stats->fcp_output_requests =
489 data->output_requests - old->output_requests;
490 fc_stats->fcp_control_requests =
491 data->control_requests - old->control_requests;
492 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
493 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
496 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
497 struct fsf_qtcb_bottom_port *data)
499 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
500 fc_stats->tx_frames = data->tx_frames;
501 fc_stats->tx_words = data->tx_words;
502 fc_stats->rx_frames = data->rx_frames;
503 fc_stats->rx_words = data->rx_words;
504 fc_stats->lip_count = data->lip;
505 fc_stats->nos_count = data->nos;
506 fc_stats->error_frames = data->error_frames;
507 fc_stats->dumped_frames = data->dumped_frames;
508 fc_stats->link_failure_count = data->link_failure;
509 fc_stats->loss_of_sync_count = data->loss_of_sync;
510 fc_stats->loss_of_signal_count = data->loss_of_signal;
511 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
512 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
513 fc_stats->invalid_crc_count = data->invalid_crcs;
514 fc_stats->fcp_input_requests = data->input_requests;
515 fc_stats->fcp_output_requests = data->output_requests;
516 fc_stats->fcp_control_requests = data->control_requests;
517 fc_stats->fcp_input_megabytes = data->input_mb;
518 fc_stats->fcp_output_megabytes = data->output_mb;
521 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
523 struct zfcp_adapter *adapter;
524 struct fc_host_statistics *fc_stats;
525 struct fsf_qtcb_bottom_port *data;
528 adapter = (struct zfcp_adapter *)host->hostdata[0];
529 fc_stats = zfcp_init_fc_host_stats(adapter);
533 data = kzalloc(sizeof(*data), GFP_KERNEL);
537 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
543 if (adapter->stats_reset &&
544 ((jiffies/HZ - adapter->stats_reset) <
545 data->seconds_since_last_reset))
546 zfcp_adjust_fc_host_stats(fc_stats, data,
547 adapter->stats_reset_data);
549 zfcp_set_fc_host_stats(fc_stats, data);
555 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
557 struct zfcp_adapter *adapter;
558 struct fsf_qtcb_bottom_port *data;
561 adapter = (struct zfcp_adapter *)shost->hostdata[0];
562 data = kzalloc(sizeof(*data), GFP_KERNEL);
566 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
570 adapter->stats_reset = jiffies/HZ;
571 kfree(adapter->stats_reset_data);
572 adapter->stats_reset_data = data; /* finally freed in
577 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
579 struct zfcp_adapter *adapter =
580 (struct zfcp_adapter *)shost->hostdata[0];
581 int status = atomic_read(&adapter->status);
583 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
584 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
585 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
586 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
587 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
588 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
589 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
591 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
594 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
596 rport->dev_loss_tmo = timeout;
600 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
601 * @rport: The FC rport where to teminate I/O
603 * Abort all pending SCSI commands for a port by closing the
604 * port. Using a reopen avoids a conflict with a shutdown
605 * overwriting a reopen. The "forced" ensures that a disappeared port
606 * is not opened again as valid due to the cached plogi data in
609 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
611 struct zfcp_port *port;
612 struct Scsi_Host *shost = rport_to_shost(rport);
613 struct zfcp_adapter *adapter =
614 (struct zfcp_adapter *)shost->hostdata[0];
616 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
619 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
620 put_device(&port->dev);
622 zfcp_erp_port_forced_no_port_dbf(
624 rport->port_name /* zfcp_scsi_rport_register */,
625 rport->port_id /* zfcp_scsi_rport_register */);
629 static void zfcp_scsi_rport_register(struct zfcp_port *port)
631 struct fc_rport_identifiers ids;
632 struct fc_rport *rport;
637 ids.node_name = port->wwnn;
638 ids.port_name = port->wwpn;
639 ids.port_id = port->d_id;
640 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
642 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
643 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
644 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
645 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
647 dev_err(&port->adapter->ccw_device->dev,
648 "Registering port 0x%016Lx failed\n",
649 (unsigned long long)port->wwpn);
653 rport->maxframe_size = port->maxframe_size;
654 rport->supported_classes = port->supported_classes;
656 port->starget_id = rport->scsi_target_id;
658 zfcp_unit_queue_scsi_scan(port);
661 static void zfcp_scsi_rport_block(struct zfcp_port *port)
663 struct fc_rport *rport = port->rport;
666 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
667 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
668 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
669 fc_remote_port_delete(rport);
674 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
676 get_device(&port->dev);
677 port->rport_task = RPORT_ADD;
679 if (!queue_work(port->adapter->work_queue, &port->rport_work))
680 put_device(&port->dev);
683 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
685 get_device(&port->dev);
686 port->rport_task = RPORT_DEL;
688 if (port->rport && queue_work(port->adapter->work_queue,
692 put_device(&port->dev);
695 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
698 struct zfcp_port *port;
700 read_lock_irqsave(&adapter->port_list_lock, flags);
701 list_for_each_entry(port, &adapter->port_list, list)
702 zfcp_scsi_schedule_rport_block(port);
703 read_unlock_irqrestore(&adapter->port_list_lock, flags);
706 void zfcp_scsi_rport_work(struct work_struct *work)
708 struct zfcp_port *port = container_of(work, struct zfcp_port,
711 while (port->rport_task) {
712 if (port->rport_task == RPORT_ADD) {
713 port->rport_task = RPORT_NONE;
714 zfcp_scsi_rport_register(port);
716 port->rport_task = RPORT_NONE;
717 zfcp_scsi_rport_block(port);
721 put_device(&port->dev);
725 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
726 * @adapter: The adapter where to configure DIF/DIX for the SCSI host
728 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
730 unsigned int mask = 0;
731 unsigned int data_div;
732 struct Scsi_Host *shost = adapter->scsi_host;
734 data_div = atomic_read(&adapter->status) &
735 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
738 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
739 mask |= SHOST_DIF_TYPE1_PROTECTION;
741 if (enable_dif && data_div &&
742 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
743 mask |= SHOST_DIX_TYPE1_PROTECTION;
744 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
745 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
746 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
747 shost->max_sectors = shost->sg_tablesize * 8;
750 scsi_host_set_prot(shost, mask);
754 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
755 * @scmd: The SCSI command to report the error for
756 * @ascq: The ASCQ to put in the sense buffer
758 * See the error handling in sd_done for the sense codes used here.
759 * Set DID_SOFT_ERROR to retry the request, if possible.
761 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
763 scsi_build_sense_buffer(1, scmd->sense_buffer,
764 ILLEGAL_REQUEST, 0x10, ascq);
765 set_driver_byte(scmd, DRIVER_SENSE);
766 scmd->result |= SAM_STAT_CHECK_CONDITION;
767 set_host_byte(scmd, DID_SOFT_ERROR);
770 struct fc_function_template zfcp_transport_functions = {
771 .show_starget_port_id = 1,
772 .show_starget_port_name = 1,
773 .show_starget_node_name = 1,
774 .show_rport_supported_classes = 1,
775 .show_rport_maxframe_size = 1,
776 .show_rport_dev_loss_tmo = 1,
777 .show_host_node_name = 1,
778 .show_host_port_name = 1,
779 .show_host_permanent_port_name = 1,
780 .show_host_supported_classes = 1,
781 .show_host_supported_fc4s = 1,
782 .show_host_supported_speeds = 1,
783 .show_host_maxframe_size = 1,
784 .show_host_serial_number = 1,
785 .get_fc_host_stats = zfcp_get_fc_host_stats,
786 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
787 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
788 .get_host_port_state = zfcp_get_host_port_state,
789 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
790 .show_host_port_state = 1,
791 .show_host_active_fc4s = 1,
792 .bsg_request = zfcp_fc_exec_bsg_job,
793 .bsg_timeout = zfcp_fc_timeout_bsg_job,
794 /* no functions registered for following dynamic attributes but
795 directly set by LLDD */
796 .show_host_port_type = 1,
797 .show_host_symbolic_name = 1,
798 .show_host_speed = 1,
799 .show_host_port_id = 1,
800 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),