4 * Interface to Linux SCSI midlayer.
6 * Copyright IBM Corp. 2002, 2018
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 = 1;
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 mutex_lock(&zfcp_sysfs_port_units_mutex);
128 if (zfcp_sysfs_port_is_removing(port)) {
129 /* port is already gone */
130 mutex_unlock(&zfcp_sysfs_port_units_mutex);
131 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
134 mutex_unlock(&zfcp_sysfs_port_units_mutex);
136 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
138 put_device(&unit->dev);
140 if (!unit && !(allow_lun_scan && npiv)) {
141 put_device(&port->dev);
145 zfcp_sdev->port = port;
146 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
147 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
148 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
149 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
150 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
151 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
152 spin_lock_init(&zfcp_sdev->latencies.lock);
154 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
155 zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
156 zfcp_erp_wait(port->adapter);
161 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
163 struct Scsi_Host *scsi_host = scpnt->device->host;
164 struct zfcp_adapter *adapter =
165 (struct zfcp_adapter *) scsi_host->hostdata[0];
166 struct zfcp_fsf_req *old_req, *abrt_req;
168 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
169 int retval = SUCCESS, ret;
173 /* avoid race condition between late normal completion and abort */
174 write_lock_irqsave(&adapter->abort_lock, flags);
176 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
178 write_unlock_irqrestore(&adapter->abort_lock, flags);
179 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
180 return FAILED; /* completion could be in progress */
182 old_req->data = NULL;
184 /* don't access old fsf_req after releasing the abort_lock */
185 write_unlock_irqrestore(&adapter->abort_lock, flags);
188 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
192 zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL);
193 zfcp_erp_wait(adapter);
194 ret = fc_block_scsi_eh(scpnt);
196 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
199 if (!(atomic_read(&adapter->status) &
200 ZFCP_STATUS_COMMON_RUNNING)) {
201 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
206 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
210 wait_for_completion(&abrt_req->completion);
212 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
214 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
220 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
221 zfcp_fsf_req_free(abrt_req);
225 struct zfcp_scsi_req_filter {
231 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
233 struct zfcp_scsi_req_filter *filter =
234 (struct zfcp_scsi_req_filter *)data;
236 /* already aborted - prevent side-effects - or not a SCSI command */
237 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
240 /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */
241 if (old_req->qtcb->header.port_handle != filter->port_handle)
244 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
245 old_req->qtcb->header.lun_handle != filter->lun_handle)
248 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
249 old_req->data = NULL;
252 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
254 struct zfcp_adapter *adapter = zsdev->port->adapter;
255 struct zfcp_scsi_req_filter filter = {
256 .tmf_scope = FCP_TMF_TGT_RESET,
257 .port_handle = zsdev->port->handle,
261 if (tm_flags == FCP_TMF_LUN_RESET) {
262 filter.tmf_scope = FCP_TMF_LUN_RESET;
263 filter.lun_handle = zsdev->lun_handle;
267 * abort_lock secures against other processings - in the abort-function
268 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
270 write_lock_irqsave(&adapter->abort_lock, flags);
271 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
273 write_unlock_irqrestore(&adapter->abort_lock, flags);
276 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
278 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
279 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
280 struct zfcp_fsf_req *fsf_req = NULL;
281 int retval = SUCCESS, ret;
285 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
289 zfcp_dbf_scsi_devreset("wait", scpnt, tm_flags, NULL);
290 zfcp_erp_wait(adapter);
291 ret = fc_block_scsi_eh(scpnt);
293 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
297 if (!(atomic_read(&adapter->status) &
298 ZFCP_STATUS_COMMON_RUNNING)) {
299 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL);
304 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
308 wait_for_completion(&fsf_req->completion);
310 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
311 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req);
314 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req);
315 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
318 zfcp_fsf_req_free(fsf_req);
322 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
324 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
327 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
329 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
332 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
334 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
335 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
336 int ret = SUCCESS, fc_ret;
338 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) {
339 zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p");
340 zfcp_erp_wait(adapter);
342 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
343 zfcp_erp_wait(adapter);
344 fc_ret = fc_block_scsi_eh(scpnt);
348 zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
352 struct scsi_transport_template *zfcp_scsi_transport_template;
354 static struct scsi_host_template zfcp_scsi_host_template = {
355 .module = THIS_MODULE,
357 .queuecommand = zfcp_scsi_queuecommand,
358 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
359 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
360 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
361 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
362 .slave_alloc = zfcp_scsi_slave_alloc,
363 .slave_configure = zfcp_scsi_slave_configure,
364 .slave_destroy = zfcp_scsi_slave_destroy,
365 .change_queue_depth = scsi_change_queue_depth,
369 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
370 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
371 /* GCD, adjusted later */
372 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
373 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
374 /* GCD, adjusted later */
375 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
377 .shost_attrs = zfcp_sysfs_shost_attrs,
378 .sdev_attrs = zfcp_sysfs_sdev_attrs,
379 .track_queue_depth = 1,
383 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
384 * @adapter: The zfcp adapter to register with the SCSI midlayer
386 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
388 struct ccw_dev_id dev_id;
390 if (adapter->scsi_host)
393 ccw_device_get_id(adapter->ccw_device, &dev_id);
394 /* register adapter as SCSI host with mid layer of SCSI stack */
395 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
396 sizeof (struct zfcp_adapter *));
397 if (!adapter->scsi_host) {
398 dev_err(&adapter->ccw_device->dev,
399 "Registering the FCP device with the "
400 "SCSI stack failed\n");
404 /* tell the SCSI stack some characteristics of this adapter */
405 adapter->scsi_host->max_id = 511;
406 adapter->scsi_host->max_lun = 0xFFFFFFFF;
407 adapter->scsi_host->max_channel = 0;
408 adapter->scsi_host->unique_id = dev_id.devno;
409 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
410 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
412 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
414 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
415 scsi_host_put(adapter->scsi_host);
423 * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer
424 * @adapter: The zfcp adapter to unregister.
426 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
428 struct Scsi_Host *shost;
429 struct zfcp_port *port;
431 shost = adapter->scsi_host;
435 read_lock_irq(&adapter->port_list_lock);
436 list_for_each_entry(port, &adapter->port_list, list)
438 read_unlock_irq(&adapter->port_list_lock);
440 fc_remove_host(shost);
441 scsi_remove_host(shost);
442 scsi_host_put(shost);
443 adapter->scsi_host = NULL;
446 static struct fc_host_statistics*
447 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
449 struct fc_host_statistics *fc_stats;
451 if (!adapter->fc_stats) {
452 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
455 adapter->fc_stats = fc_stats; /* freed in adapter_release */
457 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
458 return adapter->fc_stats;
461 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
462 struct fsf_qtcb_bottom_port *data,
463 struct fsf_qtcb_bottom_port *old)
465 fc_stats->seconds_since_last_reset =
466 data->seconds_since_last_reset - old->seconds_since_last_reset;
467 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
468 fc_stats->tx_words = data->tx_words - old->tx_words;
469 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
470 fc_stats->rx_words = data->rx_words - old->rx_words;
471 fc_stats->lip_count = data->lip - old->lip;
472 fc_stats->nos_count = data->nos - old->nos;
473 fc_stats->error_frames = data->error_frames - old->error_frames;
474 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
475 fc_stats->link_failure_count = data->link_failure - old->link_failure;
476 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
477 fc_stats->loss_of_signal_count =
478 data->loss_of_signal - old->loss_of_signal;
479 fc_stats->prim_seq_protocol_err_count =
480 data->psp_error_counts - old->psp_error_counts;
481 fc_stats->invalid_tx_word_count =
482 data->invalid_tx_words - old->invalid_tx_words;
483 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
484 fc_stats->fcp_input_requests =
485 data->input_requests - old->input_requests;
486 fc_stats->fcp_output_requests =
487 data->output_requests - old->output_requests;
488 fc_stats->fcp_control_requests =
489 data->control_requests - old->control_requests;
490 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
491 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
494 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
495 struct fsf_qtcb_bottom_port *data)
497 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
498 fc_stats->tx_frames = data->tx_frames;
499 fc_stats->tx_words = data->tx_words;
500 fc_stats->rx_frames = data->rx_frames;
501 fc_stats->rx_words = data->rx_words;
502 fc_stats->lip_count = data->lip;
503 fc_stats->nos_count = data->nos;
504 fc_stats->error_frames = data->error_frames;
505 fc_stats->dumped_frames = data->dumped_frames;
506 fc_stats->link_failure_count = data->link_failure;
507 fc_stats->loss_of_sync_count = data->loss_of_sync;
508 fc_stats->loss_of_signal_count = data->loss_of_signal;
509 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
510 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
511 fc_stats->invalid_crc_count = data->invalid_crcs;
512 fc_stats->fcp_input_requests = data->input_requests;
513 fc_stats->fcp_output_requests = data->output_requests;
514 fc_stats->fcp_control_requests = data->control_requests;
515 fc_stats->fcp_input_megabytes = data->input_mb;
516 fc_stats->fcp_output_megabytes = data->output_mb;
519 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
521 struct zfcp_adapter *adapter;
522 struct fc_host_statistics *fc_stats;
523 struct fsf_qtcb_bottom_port *data;
526 adapter = (struct zfcp_adapter *)host->hostdata[0];
527 fc_stats = zfcp_init_fc_host_stats(adapter);
531 data = kzalloc(sizeof(*data), GFP_KERNEL);
535 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
541 if (adapter->stats_reset &&
542 ((jiffies/HZ - adapter->stats_reset) <
543 data->seconds_since_last_reset))
544 zfcp_adjust_fc_host_stats(fc_stats, data,
545 adapter->stats_reset_data);
547 zfcp_set_fc_host_stats(fc_stats, data);
553 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
555 struct zfcp_adapter *adapter;
556 struct fsf_qtcb_bottom_port *data;
559 adapter = (struct zfcp_adapter *)shost->hostdata[0];
560 data = kzalloc(sizeof(*data), GFP_KERNEL);
564 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
568 adapter->stats_reset = jiffies/HZ;
569 kfree(adapter->stats_reset_data);
570 adapter->stats_reset_data = data; /* finally freed in
575 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
577 struct zfcp_adapter *adapter =
578 (struct zfcp_adapter *)shost->hostdata[0];
579 int status = atomic_read(&adapter->status);
581 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
582 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
583 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
584 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
585 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
586 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
587 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
589 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
592 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
594 rport->dev_loss_tmo = timeout;
598 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
599 * @rport: The FC rport where to teminate I/O
601 * Abort all pending SCSI commands for a port by closing the
602 * port. Using a reopen avoids a conflict with a shutdown
603 * overwriting a reopen. The "forced" ensures that a disappeared port
604 * is not opened again as valid due to the cached plogi data in
607 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
609 struct zfcp_port *port;
610 struct Scsi_Host *shost = rport_to_shost(rport);
611 struct zfcp_adapter *adapter =
612 (struct zfcp_adapter *)shost->hostdata[0];
614 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
617 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
618 put_device(&port->dev);
620 zfcp_erp_port_forced_no_port_dbf(
622 rport->port_name /* zfcp_scsi_rport_register */,
623 rport->port_id /* zfcp_scsi_rport_register */);
627 static void zfcp_scsi_rport_register(struct zfcp_port *port)
629 struct fc_rport_identifiers ids;
630 struct fc_rport *rport;
635 ids.node_name = port->wwnn;
636 ids.port_name = port->wwpn;
637 ids.port_id = port->d_id;
638 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
640 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
641 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
642 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
643 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
645 dev_err(&port->adapter->ccw_device->dev,
646 "Registering port 0x%016Lx failed\n",
647 (unsigned long long)port->wwpn);
651 rport->maxframe_size = port->maxframe_size;
652 rport->supported_classes = port->supported_classes;
654 port->starget_id = rport->scsi_target_id;
656 zfcp_unit_queue_scsi_scan(port);
659 static void zfcp_scsi_rport_block(struct zfcp_port *port)
661 struct fc_rport *rport = port->rport;
664 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
665 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
666 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
667 fc_remote_port_delete(rport);
672 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
674 get_device(&port->dev);
675 port->rport_task = RPORT_ADD;
677 if (!queue_work(port->adapter->work_queue, &port->rport_work))
678 put_device(&port->dev);
681 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
683 get_device(&port->dev);
684 port->rport_task = RPORT_DEL;
686 if (port->rport && queue_work(port->adapter->work_queue,
690 put_device(&port->dev);
693 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
696 struct zfcp_port *port;
698 read_lock_irqsave(&adapter->port_list_lock, flags);
699 list_for_each_entry(port, &adapter->port_list, list)
700 zfcp_scsi_schedule_rport_block(port);
701 read_unlock_irqrestore(&adapter->port_list_lock, flags);
704 void zfcp_scsi_rport_work(struct work_struct *work)
706 struct zfcp_port *port = container_of(work, struct zfcp_port,
709 while (port->rport_task) {
710 if (port->rport_task == RPORT_ADD) {
711 port->rport_task = RPORT_NONE;
712 zfcp_scsi_rport_register(port);
714 port->rport_task = RPORT_NONE;
715 zfcp_scsi_rport_block(port);
719 put_device(&port->dev);
723 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
724 * @adapter: The adapter where to configure DIF/DIX for the SCSI host
726 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
728 unsigned int mask = 0;
729 unsigned int data_div;
730 struct Scsi_Host *shost = adapter->scsi_host;
732 data_div = atomic_read(&adapter->status) &
733 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
736 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
737 mask |= SHOST_DIF_TYPE1_PROTECTION;
739 if (enable_dif && data_div &&
740 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
741 mask |= SHOST_DIX_TYPE1_PROTECTION;
742 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
743 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
744 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
745 shost->max_sectors = shost->sg_tablesize * 8;
748 scsi_host_set_prot(shost, mask);
752 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
753 * @scmd: The SCSI command to report the error for
754 * @ascq: The ASCQ to put in the sense buffer
756 * See the error handling in sd_done for the sense codes used here.
757 * Set DID_SOFT_ERROR to retry the request, if possible.
759 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
761 scsi_build_sense_buffer(1, scmd->sense_buffer,
762 ILLEGAL_REQUEST, 0x10, ascq);
763 set_driver_byte(scmd, DRIVER_SENSE);
764 scmd->result |= SAM_STAT_CHECK_CONDITION;
765 set_host_byte(scmd, DID_SOFT_ERROR);
768 struct fc_function_template zfcp_transport_functions = {
769 .show_starget_port_id = 1,
770 .show_starget_port_name = 1,
771 .show_starget_node_name = 1,
772 .show_rport_supported_classes = 1,
773 .show_rport_maxframe_size = 1,
774 .show_rport_dev_loss_tmo = 1,
775 .show_host_node_name = 1,
776 .show_host_port_name = 1,
777 .show_host_permanent_port_name = 1,
778 .show_host_supported_classes = 1,
779 .show_host_supported_fc4s = 1,
780 .show_host_supported_speeds = 1,
781 .show_host_maxframe_size = 1,
782 .show_host_serial_number = 1,
783 .get_fc_host_stats = zfcp_get_fc_host_stats,
784 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
785 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
786 .get_host_port_state = zfcp_get_host_port_state,
787 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
788 .show_host_port_state = 1,
789 .show_host_active_fc4s = 1,
790 .bsg_request = zfcp_fc_exec_bsg_job,
791 .bsg_timeout = zfcp_fc_timeout_bsg_job,
792 /* no functions registered for following dynamic attributes but
793 directly set by LLDD */
794 .show_host_port_type = 1,
795 .show_host_symbolic_name = 1,
796 .show_host_speed = 1,
797 .show_host_port_id = 1,
798 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),