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 data integrity support (default off)");
32 bool zfcp_experimental_dix;
33 module_param_named(dix, zfcp_experimental_dix, bool, 0400);
34 MODULE_PARM_DESC(dix, "Enable experimental DIX (data integrity extension) support which implies DIF support (default off)");
36 static bool allow_lun_scan = true;
37 module_param(allow_lun_scan, bool, 0600);
38 MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs");
40 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
42 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
44 /* if previous slave_alloc returned early, there is nothing to do */
48 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
49 put_device(&zfcp_sdev->port->dev);
52 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
54 if (sdp->tagged_supported)
55 scsi_change_queue_depth(sdp, default_depth);
59 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
61 set_host_byte(scpnt, result);
62 zfcp_dbf_scsi_fail_send(scpnt);
63 scpnt->scsi_done(scpnt);
67 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
69 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
70 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
71 int status, scsi_result, ret;
73 /* reset the status for this request */
75 scpnt->host_scribble = NULL;
77 scsi_result = fc_remote_port_chkready(rport);
78 if (unlikely(scsi_result)) {
79 scpnt->result = scsi_result;
80 zfcp_dbf_scsi_fail_send(scpnt);
81 scpnt->scsi_done(scpnt);
85 status = atomic_read(&zfcp_sdev->status);
86 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
87 !(atomic_read(&zfcp_sdev->port->status) &
88 ZFCP_STATUS_COMMON_ERP_FAILED)) {
89 /* only LUN access denied, but port is good
90 * not covered by FC transport, have to fail here */
91 zfcp_scsi_command_fail(scpnt, DID_ERROR);
95 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
97 * call to rport_delete pending: mimic retry from
98 * fc_remote_port_chkready until rport is BLOCKED
100 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
104 ret = zfcp_fsf_fcp_cmnd(scpnt);
105 if (unlikely(ret == -EBUSY))
106 return SCSI_MLQUEUE_DEVICE_BUSY;
107 else if (unlikely(ret < 0))
108 return SCSI_MLQUEUE_HOST_BUSY;
113 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
115 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
116 struct zfcp_adapter *adapter =
117 (struct zfcp_adapter *) sdev->host->hostdata[0];
118 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
119 struct zfcp_port *port;
120 struct zfcp_unit *unit;
121 int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE;
123 zfcp_sdev->erp_action.adapter = adapter;
124 zfcp_sdev->erp_action.sdev = sdev;
126 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
130 zfcp_sdev->erp_action.port = port;
132 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
134 put_device(&unit->dev);
136 if (!unit && !(allow_lun_scan && npiv)) {
137 put_device(&port->dev);
141 zfcp_sdev->port = port;
142 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
143 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
144 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
145 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
146 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
147 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
148 spin_lock_init(&zfcp_sdev->latencies.lock);
150 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
151 zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
152 zfcp_erp_wait(port->adapter);
157 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
159 struct Scsi_Host *scsi_host = scpnt->device->host;
160 struct zfcp_adapter *adapter =
161 (struct zfcp_adapter *) scsi_host->hostdata[0];
162 struct zfcp_fsf_req *old_req, *abrt_req;
164 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
165 int retval = SUCCESS, ret;
169 /* avoid race condition between late normal completion and abort */
170 write_lock_irqsave(&adapter->abort_lock, flags);
172 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
174 write_unlock_irqrestore(&adapter->abort_lock, flags);
175 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
176 return FAILED; /* completion could be in progress */
178 old_req->data = NULL;
180 /* don't access old fsf_req after releasing the abort_lock */
181 write_unlock_irqrestore(&adapter->abort_lock, flags);
184 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
188 zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL);
189 zfcp_erp_wait(adapter);
190 ret = fc_block_scsi_eh(scpnt);
192 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
195 if (!(atomic_read(&adapter->status) &
196 ZFCP_STATUS_COMMON_RUNNING)) {
197 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
202 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
206 wait_for_completion(&abrt_req->completion);
208 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
210 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
216 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
217 zfcp_fsf_req_free(abrt_req);
221 struct zfcp_scsi_req_filter {
227 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
229 struct zfcp_scsi_req_filter *filter =
230 (struct zfcp_scsi_req_filter *)data;
232 /* already aborted - prevent side-effects - or not a SCSI command */
233 if (old_req->data == NULL ||
234 zfcp_fsf_req_is_status_read_buffer(old_req) ||
235 old_req->qtcb->header.fsf_command != FSF_QTCB_FCP_CMND)
238 /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */
239 if (old_req->qtcb->header.port_handle != filter->port_handle)
242 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
243 old_req->qtcb->header.lun_handle != filter->lun_handle)
246 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
247 old_req->data = NULL;
250 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
252 struct zfcp_adapter *adapter = zsdev->port->adapter;
253 struct zfcp_scsi_req_filter filter = {
254 .tmf_scope = FCP_TMF_TGT_RESET,
255 .port_handle = zsdev->port->handle,
259 if (tm_flags == FCP_TMF_LUN_RESET) {
260 filter.tmf_scope = FCP_TMF_LUN_RESET;
261 filter.lun_handle = zsdev->lun_handle;
265 * abort_lock secures against other processings - in the abort-function
266 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
268 write_lock_irqsave(&adapter->abort_lock, flags);
269 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
271 write_unlock_irqrestore(&adapter->abort_lock, flags);
275 * zfcp_scsi_task_mgmt_function() - Send a task management function (sync).
276 * @sdev: Pointer to SCSI device to send the task management command to.
277 * @tm_flags: Task management flags,
278 * here we only handle %FCP_TMF_TGT_RESET or %FCP_TMF_LUN_RESET.
280 static int zfcp_scsi_task_mgmt_function(struct scsi_device *sdev, u8 tm_flags)
282 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
283 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
284 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
285 struct zfcp_fsf_req *fsf_req = NULL;
286 int retval = SUCCESS, ret;
290 fsf_req = zfcp_fsf_fcp_task_mgmt(sdev, tm_flags);
294 zfcp_dbf_scsi_devreset("wait", sdev, tm_flags, NULL);
295 zfcp_erp_wait(adapter);
296 ret = fc_block_rport(rport);
298 zfcp_dbf_scsi_devreset("fiof", sdev, tm_flags, NULL);
302 if (!(atomic_read(&adapter->status) &
303 ZFCP_STATUS_COMMON_RUNNING)) {
304 zfcp_dbf_scsi_devreset("nres", sdev, tm_flags, NULL);
309 zfcp_dbf_scsi_devreset("reqf", sdev, tm_flags, NULL);
313 wait_for_completion(&fsf_req->completion);
315 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
316 zfcp_dbf_scsi_devreset("fail", sdev, tm_flags, fsf_req);
319 zfcp_dbf_scsi_devreset("okay", sdev, tm_flags, fsf_req);
320 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
323 zfcp_fsf_req_free(fsf_req);
327 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
329 struct scsi_device *sdev = scpnt->device;
331 return zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_LUN_RESET);
334 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
336 struct scsi_target *starget = scsi_target(scpnt->device);
337 struct fc_rport *rport = starget_to_rport(starget);
338 struct Scsi_Host *shost = rport_to_shost(rport);
339 struct scsi_device *sdev = NULL, *tmp_sdev;
340 struct zfcp_adapter *adapter =
341 (struct zfcp_adapter *)shost->hostdata[0];
344 shost_for_each_device(tmp_sdev, shost) {
345 if (tmp_sdev->id == starget->id) {
352 zfcp_dbf_scsi_eh("tr_nosd", adapter, starget->id, ret);
356 ret = zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_TGT_RESET);
358 /* release reference from above shost_for_each_device */
360 scsi_device_put(tmp_sdev);
365 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
367 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
368 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
369 int ret = SUCCESS, fc_ret;
371 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
372 zfcp_erp_wait(adapter);
373 fc_ret = fc_block_scsi_eh(scpnt);
377 zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
382 * zfcp_scsi_sysfs_host_reset() - Support scsi_host sysfs attribute host_reset.
383 * @shost: Pointer to Scsi_Host to perform action on.
384 * @reset_type: We support %SCSI_ADAPTER_RESET but not %SCSI_FIRMWARE_RESET.
386 * Return: 0 on %SCSI_ADAPTER_RESET, -%EOPNOTSUPP otherwise.
388 * This is similar to zfcp_sysfs_adapter_failed_store().
390 static int zfcp_scsi_sysfs_host_reset(struct Scsi_Host *shost, int reset_type)
392 struct zfcp_adapter *adapter =
393 (struct zfcp_adapter *)shost->hostdata[0];
396 if (reset_type != SCSI_ADAPTER_RESET) {
398 zfcp_dbf_scsi_eh("scshr_n", adapter, ~0, ret);
402 zfcp_erp_adapter_reset_sync(adapter, "scshr_y");
406 struct scsi_transport_template *zfcp_scsi_transport_template;
408 static struct scsi_host_template zfcp_scsi_host_template = {
409 .module = THIS_MODULE,
411 .queuecommand = zfcp_scsi_queuecommand,
412 .eh_timed_out = fc_eh_timed_out,
413 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
414 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
415 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
416 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
417 .slave_alloc = zfcp_scsi_slave_alloc,
418 .slave_configure = zfcp_scsi_slave_configure,
419 .slave_destroy = zfcp_scsi_slave_destroy,
420 .change_queue_depth = scsi_change_queue_depth,
421 .host_reset = zfcp_scsi_sysfs_host_reset,
425 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
426 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
427 /* GCD, adjusted later */
428 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
429 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
430 /* GCD, adjusted later */
431 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
432 .shost_attrs = zfcp_sysfs_shost_attrs,
433 .sdev_attrs = zfcp_sysfs_sdev_attrs,
434 .track_queue_depth = 1,
435 .supported_mode = MODE_INITIATOR,
439 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
440 * @adapter: The zfcp adapter to register with the SCSI midlayer
442 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
444 struct ccw_dev_id dev_id;
446 if (adapter->scsi_host)
449 ccw_device_get_id(adapter->ccw_device, &dev_id);
450 /* register adapter as SCSI host with mid layer of SCSI stack */
451 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
452 sizeof (struct zfcp_adapter *));
453 if (!adapter->scsi_host) {
454 dev_err(&adapter->ccw_device->dev,
455 "Registering the FCP device with the "
456 "SCSI stack failed\n");
460 /* tell the SCSI stack some characteristics of this adapter */
461 adapter->scsi_host->max_id = 511;
462 adapter->scsi_host->max_lun = 0xFFFFFFFF;
463 adapter->scsi_host->max_channel = 0;
464 adapter->scsi_host->unique_id = dev_id.devno;
465 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
466 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
468 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
470 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
471 scsi_host_put(adapter->scsi_host);
479 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
480 * @adapter: The zfcp adapter to unregister.
482 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
484 struct Scsi_Host *shost;
485 struct zfcp_port *port;
487 shost = adapter->scsi_host;
491 read_lock_irq(&adapter->port_list_lock);
492 list_for_each_entry(port, &adapter->port_list, list)
494 read_unlock_irq(&adapter->port_list_lock);
496 fc_remove_host(shost);
497 scsi_remove_host(shost);
498 scsi_host_put(shost);
499 adapter->scsi_host = NULL;
502 static struct fc_host_statistics*
503 zfcp_scsi_init_fc_host_stats(struct zfcp_adapter *adapter)
505 struct fc_host_statistics *fc_stats;
507 if (!adapter->fc_stats) {
508 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
511 adapter->fc_stats = fc_stats; /* freed in adapter_release */
513 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
514 return adapter->fc_stats;
517 static void zfcp_scsi_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
518 struct fsf_qtcb_bottom_port *data,
519 struct fsf_qtcb_bottom_port *old)
521 fc_stats->seconds_since_last_reset =
522 data->seconds_since_last_reset - old->seconds_since_last_reset;
523 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
524 fc_stats->tx_words = data->tx_words - old->tx_words;
525 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
526 fc_stats->rx_words = data->rx_words - old->rx_words;
527 fc_stats->lip_count = data->lip - old->lip;
528 fc_stats->nos_count = data->nos - old->nos;
529 fc_stats->error_frames = data->error_frames - old->error_frames;
530 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
531 fc_stats->link_failure_count = data->link_failure - old->link_failure;
532 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
533 fc_stats->loss_of_signal_count =
534 data->loss_of_signal - old->loss_of_signal;
535 fc_stats->prim_seq_protocol_err_count =
536 data->psp_error_counts - old->psp_error_counts;
537 fc_stats->invalid_tx_word_count =
538 data->invalid_tx_words - old->invalid_tx_words;
539 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
540 fc_stats->fcp_input_requests =
541 data->input_requests - old->input_requests;
542 fc_stats->fcp_output_requests =
543 data->output_requests - old->output_requests;
544 fc_stats->fcp_control_requests =
545 data->control_requests - old->control_requests;
546 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
547 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
550 static void zfcp_scsi_set_fc_host_stats(struct fc_host_statistics *fc_stats,
551 struct fsf_qtcb_bottom_port *data)
553 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
554 fc_stats->tx_frames = data->tx_frames;
555 fc_stats->tx_words = data->tx_words;
556 fc_stats->rx_frames = data->rx_frames;
557 fc_stats->rx_words = data->rx_words;
558 fc_stats->lip_count = data->lip;
559 fc_stats->nos_count = data->nos;
560 fc_stats->error_frames = data->error_frames;
561 fc_stats->dumped_frames = data->dumped_frames;
562 fc_stats->link_failure_count = data->link_failure;
563 fc_stats->loss_of_sync_count = data->loss_of_sync;
564 fc_stats->loss_of_signal_count = data->loss_of_signal;
565 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
566 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
567 fc_stats->invalid_crc_count = data->invalid_crcs;
568 fc_stats->fcp_input_requests = data->input_requests;
569 fc_stats->fcp_output_requests = data->output_requests;
570 fc_stats->fcp_control_requests = data->control_requests;
571 fc_stats->fcp_input_megabytes = data->input_mb;
572 fc_stats->fcp_output_megabytes = data->output_mb;
575 static struct fc_host_statistics *
576 zfcp_scsi_get_fc_host_stats(struct Scsi_Host *host)
578 struct zfcp_adapter *adapter;
579 struct fc_host_statistics *fc_stats;
580 struct fsf_qtcb_bottom_port *data;
583 adapter = (struct zfcp_adapter *)host->hostdata[0];
584 fc_stats = zfcp_scsi_init_fc_host_stats(adapter);
588 data = kzalloc(sizeof(*data), GFP_KERNEL);
592 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
598 if (adapter->stats_reset &&
599 ((jiffies/HZ - adapter->stats_reset) <
600 data->seconds_since_last_reset))
601 zfcp_scsi_adjust_fc_host_stats(fc_stats, data,
602 adapter->stats_reset_data);
604 zfcp_scsi_set_fc_host_stats(fc_stats, data);
610 static void zfcp_scsi_reset_fc_host_stats(struct Scsi_Host *shost)
612 struct zfcp_adapter *adapter;
613 struct fsf_qtcb_bottom_port *data;
616 adapter = (struct zfcp_adapter *)shost->hostdata[0];
617 data = kzalloc(sizeof(*data), GFP_KERNEL);
621 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
625 adapter->stats_reset = jiffies/HZ;
626 kfree(adapter->stats_reset_data);
627 adapter->stats_reset_data = data; /* finally freed in
632 static void zfcp_scsi_get_host_port_state(struct Scsi_Host *shost)
634 struct zfcp_adapter *adapter =
635 (struct zfcp_adapter *)shost->hostdata[0];
636 int status = atomic_read(&adapter->status);
638 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
639 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
640 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
641 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
642 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
643 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
644 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
646 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
649 static void zfcp_scsi_set_rport_dev_loss_tmo(struct fc_rport *rport,
652 rport->dev_loss_tmo = timeout;
656 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
657 * @rport: The FC rport where to teminate I/O
659 * Abort all pending SCSI commands for a port by closing the
660 * port. Using a reopen avoids a conflict with a shutdown
661 * overwriting a reopen. The "forced" ensures that a disappeared port
662 * is not opened again as valid due to the cached plogi data in
665 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
667 struct zfcp_port *port;
668 struct Scsi_Host *shost = rport_to_shost(rport);
669 struct zfcp_adapter *adapter =
670 (struct zfcp_adapter *)shost->hostdata[0];
672 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
675 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
676 put_device(&port->dev);
678 zfcp_erp_port_forced_no_port_dbf(
680 rport->port_name /* zfcp_scsi_rport_register */,
681 rport->port_id /* zfcp_scsi_rport_register */);
685 static void zfcp_scsi_rport_register(struct zfcp_port *port)
687 struct fc_rport_identifiers ids;
688 struct fc_rport *rport;
693 ids.node_name = port->wwnn;
694 ids.port_name = port->wwpn;
695 ids.port_id = port->d_id;
696 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
698 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
699 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
700 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
701 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
703 dev_err(&port->adapter->ccw_device->dev,
704 "Registering port 0x%016Lx failed\n",
705 (unsigned long long)port->wwpn);
709 rport->maxframe_size = port->maxframe_size;
710 rport->supported_classes = port->supported_classes;
712 port->starget_id = rport->scsi_target_id;
714 zfcp_unit_queue_scsi_scan(port);
717 static void zfcp_scsi_rport_block(struct zfcp_port *port)
719 struct fc_rport *rport = port->rport;
722 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
723 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
724 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
725 fc_remote_port_delete(rport);
730 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
732 get_device(&port->dev);
733 port->rport_task = RPORT_ADD;
735 if (!queue_work(port->adapter->work_queue, &port->rport_work))
736 put_device(&port->dev);
739 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
741 get_device(&port->dev);
742 port->rport_task = RPORT_DEL;
744 if (port->rport && queue_work(port->adapter->work_queue,
748 put_device(&port->dev);
751 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
754 struct zfcp_port *port;
756 read_lock_irqsave(&adapter->port_list_lock, flags);
757 list_for_each_entry(port, &adapter->port_list, list)
758 zfcp_scsi_schedule_rport_block(port);
759 read_unlock_irqrestore(&adapter->port_list_lock, flags);
762 void zfcp_scsi_rport_work(struct work_struct *work)
764 struct zfcp_port *port = container_of(work, struct zfcp_port,
767 set_worker_desc("zrp%c-%16llx",
768 (port->rport_task == RPORT_ADD) ? 'a' : 'd',
769 port->wwpn); /* < WORKER_DESC_LEN=24 */
770 while (port->rport_task) {
771 if (port->rport_task == RPORT_ADD) {
772 port->rport_task = RPORT_NONE;
773 zfcp_scsi_rport_register(port);
775 port->rport_task = RPORT_NONE;
776 zfcp_scsi_rport_block(port);
780 put_device(&port->dev);
784 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
785 * @adapter: The adapter where to configure DIF/DIX for the SCSI host
787 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
789 unsigned int mask = 0;
790 unsigned int data_div;
791 struct Scsi_Host *shost = adapter->scsi_host;
793 data_div = atomic_read(&adapter->status) &
794 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
796 if ((enable_dif || zfcp_experimental_dix) &&
797 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
798 mask |= SHOST_DIF_TYPE1_PROTECTION;
800 if (zfcp_experimental_dix && data_div &&
801 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
802 mask |= SHOST_DIX_TYPE1_PROTECTION;
803 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
804 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
805 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
806 shost->max_sectors = shost->sg_tablesize * 8;
809 scsi_host_set_prot(shost, mask);
813 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
814 * @scmd: The SCSI command to report the error for
815 * @ascq: The ASCQ to put in the sense buffer
817 * See the error handling in sd_done for the sense codes used here.
818 * Set DID_SOFT_ERROR to retry the request, if possible.
820 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
822 scsi_build_sense_buffer(1, scmd->sense_buffer,
823 ILLEGAL_REQUEST, 0x10, ascq);
824 set_driver_byte(scmd, DRIVER_SENSE);
825 scmd->result |= SAM_STAT_CHECK_CONDITION;
826 set_host_byte(scmd, DID_SOFT_ERROR);
829 struct fc_function_template zfcp_transport_functions = {
830 .show_starget_port_id = 1,
831 .show_starget_port_name = 1,
832 .show_starget_node_name = 1,
833 .show_rport_supported_classes = 1,
834 .show_rport_maxframe_size = 1,
835 .show_rport_dev_loss_tmo = 1,
836 .show_host_node_name = 1,
837 .show_host_port_name = 1,
838 .show_host_permanent_port_name = 1,
839 .show_host_supported_classes = 1,
840 .show_host_supported_fc4s = 1,
841 .show_host_supported_speeds = 1,
842 .show_host_maxframe_size = 1,
843 .show_host_serial_number = 1,
844 .get_fc_host_stats = zfcp_scsi_get_fc_host_stats,
845 .reset_fc_host_stats = zfcp_scsi_reset_fc_host_stats,
846 .set_rport_dev_loss_tmo = zfcp_scsi_set_rport_dev_loss_tmo,
847 .get_host_port_state = zfcp_scsi_get_host_port_state,
848 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
849 .show_host_port_state = 1,
850 .show_host_active_fc4s = 1,
851 .bsg_request = zfcp_fc_exec_bsg_job,
852 .bsg_timeout = zfcp_fc_timeout_bsg_job,
853 /* no functions registered for following dynamic attributes but
854 directly set by LLDD */
855 .show_host_port_type = 1,
856 .show_host_symbolic_name = 1,
857 .show_host_speed = 1,
858 .show_host_port_id = 1,
859 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),