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10#define KMSG_COMPONENT "zfcp"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
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>
19#include "zfcp_ext.h"
20#include "zfcp_dbf.h"
21#include "zfcp_fc.h"
22#include "zfcp_reqlist.h"
23
24static unsigned int default_depth = 32;
25module_param_named(queue_depth, default_depth, uint, 0600);
26MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
27
28static bool enable_dif;
29module_param_named(dif, enable_dif, bool, 0400);
30MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support");
31
32static bool allow_lun_scan = true;
33module_param(allow_lun_scan, bool, 0600);
34MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs");
35
36static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
37{
38 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
39
40
41 if (!zfcp_sdev->port)
42 return;
43
44 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
45 put_device(&zfcp_sdev->port->dev);
46}
47
48static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
49{
50 if (sdp->tagged_supported)
51 scsi_change_queue_depth(sdp, default_depth);
52 return 0;
53}
54
55static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
56{
57 set_host_byte(scpnt, result);
58 zfcp_dbf_scsi_fail_send(scpnt);
59 scpnt->scsi_done(scpnt);
60}
61
62static
63int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
64{
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;
68
69
70 scpnt->result = 0;
71 scpnt->host_scribble = NULL;
72
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);
78 return 0;
79 }
80
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
86
87 zfcp_scsi_command_fail(scpnt, DID_ERROR);
88 return 0;
89 }
90
91 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
92
93
94
95
96 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
97 return 0;
98 }
99
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;
105
106 return ret;
107}
108
109static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
110{
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;
118
119 zfcp_sdev->erp_action.adapter = adapter;
120 zfcp_sdev->erp_action.sdev = sdev;
121
122 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
123 if (!port)
124 return -ENXIO;
125
126 zfcp_sdev->erp_action.port = port;
127
128 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
129 if (unit)
130 put_device(&unit->dev);
131
132 if (!unit && !(allow_lun_scan && npiv)) {
133 put_device(&port->dev);
134 return -ENXIO;
135 }
136
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);
145
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);
149
150 return 0;
151}
152
153static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
154{
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;
159 unsigned long flags;
160 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
161 int retval = SUCCESS, ret;
162 int retry = 3;
163 char *dbf_tag;
164
165
166 write_lock_irqsave(&adapter->abort_lock, flags);
167
168 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
169 if (!old_req) {
170 write_unlock_irqrestore(&adapter->abort_lock, flags);
171 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
172 return FAILED;
173 }
174 old_req->data = NULL;
175
176
177 write_unlock_irqrestore(&adapter->abort_lock, flags);
178
179 while (retry--) {
180 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
181 if (abrt_req)
182 break;
183
184 zfcp_erp_wait(adapter);
185 ret = fc_block_scsi_eh(scpnt);
186 if (ret) {
187 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
188 return ret;
189 }
190 if (!(atomic_read(&adapter->status) &
191 ZFCP_STATUS_COMMON_RUNNING)) {
192 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
193 return SUCCESS;
194 }
195 }
196 if (!abrt_req) {
197 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
198 return FAILED;
199 }
200
201 wait_for_completion(&abrt_req->completion);
202
203 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
204 dbf_tag = "abrt_ok";
205 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
206 dbf_tag = "abrt_nn";
207 else {
208 dbf_tag = "abrt_fa";
209 retval = FAILED;
210 }
211 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
212 zfcp_fsf_req_free(abrt_req);
213 return retval;
214}
215
216struct zfcp_scsi_req_filter {
217 u8 tmf_scope;
218 u32 lun_handle;
219 u32 port_handle;
220};
221
222static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
223{
224 struct zfcp_scsi_req_filter *filter =
225 (struct zfcp_scsi_req_filter *)data;
226
227
228 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
229 return;
230
231
232 if (old_req->qtcb->header.port_handle != filter->port_handle)
233 return;
234
235 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
236 old_req->qtcb->header.lun_handle != filter->lun_handle)
237 return;
238
239 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
240 old_req->data = NULL;
241}
242
243static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
244{
245 struct zfcp_adapter *adapter = zsdev->port->adapter;
246 struct zfcp_scsi_req_filter filter = {
247 .tmf_scope = FCP_TMF_TGT_RESET,
248 .port_handle = zsdev->port->handle,
249 };
250 unsigned long flags;
251
252 if (tm_flags == FCP_TMF_LUN_RESET) {
253 filter.tmf_scope = FCP_TMF_LUN_RESET;
254 filter.lun_handle = zsdev->lun_handle;
255 }
256
257
258
259
260
261 write_lock_irqsave(&adapter->abort_lock, flags);
262 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
263 &filter);
264 write_unlock_irqrestore(&adapter->abort_lock, flags);
265}
266
267static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
268{
269 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
270 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
271 struct zfcp_fsf_req *fsf_req = NULL;
272 int retval = SUCCESS, ret;
273 int retry = 3;
274
275 while (retry--) {
276 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
277 if (fsf_req)
278 break;
279
280 zfcp_erp_wait(adapter);
281 ret = fc_block_scsi_eh(scpnt);
282 if (ret) {
283 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
284 return ret;
285 }
286
287 if (!(atomic_read(&adapter->status) &
288 ZFCP_STATUS_COMMON_RUNNING)) {
289 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL);
290 return SUCCESS;
291 }
292 }
293 if (!fsf_req) {
294 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
295 return FAILED;
296 }
297
298 wait_for_completion(&fsf_req->completion);
299
300 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
301 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req);
302 retval = FAILED;
303 } else {
304 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req);
305 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
306 }
307
308 zfcp_fsf_req_free(fsf_req);
309 return retval;
310}
311
312static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
313{
314 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
315}
316
317static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
318{
319 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
320}
321
322static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
323{
324 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
325 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
326 int ret;
327
328 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
329 zfcp_erp_wait(adapter);
330 ret = fc_block_scsi_eh(scpnt);
331 if (ret)
332 return ret;
333
334 return SUCCESS;
335}
336
337struct scsi_transport_template *zfcp_scsi_transport_template;
338
339static struct scsi_host_template zfcp_scsi_host_template = {
340 .module = THIS_MODULE,
341 .name = "zfcp",
342 .queuecommand = zfcp_scsi_queuecommand,
343 .eh_timed_out = fc_eh_timed_out,
344 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
345 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
346 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
347 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
348 .slave_alloc = zfcp_scsi_slave_alloc,
349 .slave_configure = zfcp_scsi_slave_configure,
350 .slave_destroy = zfcp_scsi_slave_destroy,
351 .change_queue_depth = scsi_change_queue_depth,
352 .proc_name = "zfcp",
353 .can_queue = 4096,
354 .this_id = -1,
355 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
356 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
357
358 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
359 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
360
361 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
362 .use_clustering = 1,
363 .shost_attrs = zfcp_sysfs_shost_attrs,
364 .sdev_attrs = zfcp_sysfs_sdev_attrs,
365 .track_queue_depth = 1,
366};
367
368
369
370
371
372int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
373{
374 struct ccw_dev_id dev_id;
375
376 if (adapter->scsi_host)
377 return 0;
378
379 ccw_device_get_id(adapter->ccw_device, &dev_id);
380
381 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
382 sizeof (struct zfcp_adapter *));
383 if (!adapter->scsi_host) {
384 dev_err(&adapter->ccw_device->dev,
385 "Registering the FCP device with the "
386 "SCSI stack failed\n");
387 return -EIO;
388 }
389
390
391 adapter->scsi_host->max_id = 511;
392 adapter->scsi_host->max_lun = 0xFFFFFFFF;
393 adapter->scsi_host->max_channel = 0;
394 adapter->scsi_host->unique_id = dev_id.devno;
395 adapter->scsi_host->max_cmd_len = 16;
396 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
397
398 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
399
400 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
401 scsi_host_put(adapter->scsi_host);
402 return -EIO;
403 }
404
405 return 0;
406}
407
408
409
410
411
412void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
413{
414 struct Scsi_Host *shost;
415 struct zfcp_port *port;
416
417 shost = adapter->scsi_host;
418 if (!shost)
419 return;
420
421 read_lock_irq(&adapter->port_list_lock);
422 list_for_each_entry(port, &adapter->port_list, list)
423 port->rport = NULL;
424 read_unlock_irq(&adapter->port_list_lock);
425
426 fc_remove_host(shost);
427 scsi_remove_host(shost);
428 scsi_host_put(shost);
429 adapter->scsi_host = NULL;
430}
431
432static struct fc_host_statistics*
433zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
434{
435 struct fc_host_statistics *fc_stats;
436
437 if (!adapter->fc_stats) {
438 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
439 if (!fc_stats)
440 return NULL;
441 adapter->fc_stats = fc_stats;
442 }
443 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
444 return adapter->fc_stats;
445}
446
447static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
448 struct fsf_qtcb_bottom_port *data,
449 struct fsf_qtcb_bottom_port *old)
450{
451 fc_stats->seconds_since_last_reset =
452 data->seconds_since_last_reset - old->seconds_since_last_reset;
453 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
454 fc_stats->tx_words = data->tx_words - old->tx_words;
455 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
456 fc_stats->rx_words = data->rx_words - old->rx_words;
457 fc_stats->lip_count = data->lip - old->lip;
458 fc_stats->nos_count = data->nos - old->nos;
459 fc_stats->error_frames = data->error_frames - old->error_frames;
460 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
461 fc_stats->link_failure_count = data->link_failure - old->link_failure;
462 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
463 fc_stats->loss_of_signal_count =
464 data->loss_of_signal - old->loss_of_signal;
465 fc_stats->prim_seq_protocol_err_count =
466 data->psp_error_counts - old->psp_error_counts;
467 fc_stats->invalid_tx_word_count =
468 data->invalid_tx_words - old->invalid_tx_words;
469 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
470 fc_stats->fcp_input_requests =
471 data->input_requests - old->input_requests;
472 fc_stats->fcp_output_requests =
473 data->output_requests - old->output_requests;
474 fc_stats->fcp_control_requests =
475 data->control_requests - old->control_requests;
476 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
477 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
478}
479
480static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
481 struct fsf_qtcb_bottom_port *data)
482{
483 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
484 fc_stats->tx_frames = data->tx_frames;
485 fc_stats->tx_words = data->tx_words;
486 fc_stats->rx_frames = data->rx_frames;
487 fc_stats->rx_words = data->rx_words;
488 fc_stats->lip_count = data->lip;
489 fc_stats->nos_count = data->nos;
490 fc_stats->error_frames = data->error_frames;
491 fc_stats->dumped_frames = data->dumped_frames;
492 fc_stats->link_failure_count = data->link_failure;
493 fc_stats->loss_of_sync_count = data->loss_of_sync;
494 fc_stats->loss_of_signal_count = data->loss_of_signal;
495 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
496 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
497 fc_stats->invalid_crc_count = data->invalid_crcs;
498 fc_stats->fcp_input_requests = data->input_requests;
499 fc_stats->fcp_output_requests = data->output_requests;
500 fc_stats->fcp_control_requests = data->control_requests;
501 fc_stats->fcp_input_megabytes = data->input_mb;
502 fc_stats->fcp_output_megabytes = data->output_mb;
503}
504
505static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
506{
507 struct zfcp_adapter *adapter;
508 struct fc_host_statistics *fc_stats;
509 struct fsf_qtcb_bottom_port *data;
510 int ret;
511
512 adapter = (struct zfcp_adapter *)host->hostdata[0];
513 fc_stats = zfcp_init_fc_host_stats(adapter);
514 if (!fc_stats)
515 return NULL;
516
517 data = kzalloc(sizeof(*data), GFP_KERNEL);
518 if (!data)
519 return NULL;
520
521 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
522 if (ret) {
523 kfree(data);
524 return NULL;
525 }
526
527 if (adapter->stats_reset &&
528 ((jiffies/HZ - adapter->stats_reset) <
529 data->seconds_since_last_reset))
530 zfcp_adjust_fc_host_stats(fc_stats, data,
531 adapter->stats_reset_data);
532 else
533 zfcp_set_fc_host_stats(fc_stats, data);
534
535 kfree(data);
536 return fc_stats;
537}
538
539static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
540{
541 struct zfcp_adapter *adapter;
542 struct fsf_qtcb_bottom_port *data;
543 int ret;
544
545 adapter = (struct zfcp_adapter *)shost->hostdata[0];
546 data = kzalloc(sizeof(*data), GFP_KERNEL);
547 if (!data)
548 return;
549
550 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
551 if (ret)
552 kfree(data);
553 else {
554 adapter->stats_reset = jiffies/HZ;
555 kfree(adapter->stats_reset_data);
556 adapter->stats_reset_data = data;
557
558 }
559}
560
561static void zfcp_get_host_port_state(struct Scsi_Host *shost)
562{
563 struct zfcp_adapter *adapter =
564 (struct zfcp_adapter *)shost->hostdata[0];
565 int status = atomic_read(&adapter->status);
566
567 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
568 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
569 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
570 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
571 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
572 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
573 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
574 else
575 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
576}
577
578static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
579{
580 rport->dev_loss_tmo = timeout;
581}
582
583
584
585
586
587
588
589
590
591
592
593static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
594{
595 struct zfcp_port *port;
596 struct Scsi_Host *shost = rport_to_shost(rport);
597 struct zfcp_adapter *adapter =
598 (struct zfcp_adapter *)shost->hostdata[0];
599
600 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
601
602 if (port) {
603 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
604 put_device(&port->dev);
605 }
606}
607
608static void zfcp_scsi_rport_register(struct zfcp_port *port)
609{
610 struct fc_rport_identifiers ids;
611 struct fc_rport *rport;
612
613 if (port->rport)
614 return;
615
616 ids.node_name = port->wwnn;
617 ids.port_name = port->wwpn;
618 ids.port_id = port->d_id;
619 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
620
621 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
622 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
623 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
624 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
625 if (!rport) {
626 dev_err(&port->adapter->ccw_device->dev,
627 "Registering port 0x%016Lx failed\n",
628 (unsigned long long)port->wwpn);
629 return;
630 }
631
632 rport->maxframe_size = port->maxframe_size;
633 rport->supported_classes = port->supported_classes;
634 port->rport = rport;
635 port->starget_id = rport->scsi_target_id;
636
637 zfcp_unit_queue_scsi_scan(port);
638}
639
640static void zfcp_scsi_rport_block(struct zfcp_port *port)
641{
642 struct fc_rport *rport = port->rport;
643
644 if (rport) {
645 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
646 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
647 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
648 fc_remote_port_delete(rport);
649 port->rport = NULL;
650 }
651}
652
653void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
654{
655 get_device(&port->dev);
656 port->rport_task = RPORT_ADD;
657
658 if (!queue_work(port->adapter->work_queue, &port->rport_work))
659 put_device(&port->dev);
660}
661
662void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
663{
664 get_device(&port->dev);
665 port->rport_task = RPORT_DEL;
666
667 if (port->rport && queue_work(port->adapter->work_queue,
668 &port->rport_work))
669 return;
670
671 put_device(&port->dev);
672}
673
674void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
675{
676 unsigned long flags;
677 struct zfcp_port *port;
678
679 read_lock_irqsave(&adapter->port_list_lock, flags);
680 list_for_each_entry(port, &adapter->port_list, list)
681 zfcp_scsi_schedule_rport_block(port);
682 read_unlock_irqrestore(&adapter->port_list_lock, flags);
683}
684
685void zfcp_scsi_rport_work(struct work_struct *work)
686{
687 struct zfcp_port *port = container_of(work, struct zfcp_port,
688 rport_work);
689
690 while (port->rport_task) {
691 if (port->rport_task == RPORT_ADD) {
692 port->rport_task = RPORT_NONE;
693 zfcp_scsi_rport_register(port);
694 } else {
695 port->rport_task = RPORT_NONE;
696 zfcp_scsi_rport_block(port);
697 }
698 }
699
700 put_device(&port->dev);
701}
702
703
704
705
706
707void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
708{
709 unsigned int mask = 0;
710 unsigned int data_div;
711 struct Scsi_Host *shost = adapter->scsi_host;
712
713 data_div = atomic_read(&adapter->status) &
714 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
715
716 if (enable_dif &&
717 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
718 mask |= SHOST_DIF_TYPE1_PROTECTION;
719
720 if (enable_dif && data_div &&
721 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
722 mask |= SHOST_DIX_TYPE1_PROTECTION;
723 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
724 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
725 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
726 shost->max_sectors = shost->sg_tablesize * 8;
727 }
728
729 scsi_host_set_prot(shost, mask);
730}
731
732
733
734
735
736
737
738
739
740void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
741{
742 scsi_build_sense_buffer(1, scmd->sense_buffer,
743 ILLEGAL_REQUEST, 0x10, ascq);
744 set_driver_byte(scmd, DRIVER_SENSE);
745 scmd->result |= SAM_STAT_CHECK_CONDITION;
746 set_host_byte(scmd, DID_SOFT_ERROR);
747}
748
749struct fc_function_template zfcp_transport_functions = {
750 .show_starget_port_id = 1,
751 .show_starget_port_name = 1,
752 .show_starget_node_name = 1,
753 .show_rport_supported_classes = 1,
754 .show_rport_maxframe_size = 1,
755 .show_rport_dev_loss_tmo = 1,
756 .show_host_node_name = 1,
757 .show_host_port_name = 1,
758 .show_host_permanent_port_name = 1,
759 .show_host_supported_classes = 1,
760 .show_host_supported_fc4s = 1,
761 .show_host_supported_speeds = 1,
762 .show_host_maxframe_size = 1,
763 .show_host_serial_number = 1,
764 .get_fc_host_stats = zfcp_get_fc_host_stats,
765 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
766 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
767 .get_host_port_state = zfcp_get_host_port_state,
768 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
769 .show_host_port_state = 1,
770 .show_host_active_fc4s = 1,
771 .bsg_request = zfcp_fc_exec_bsg_job,
772 .bsg_timeout = zfcp_fc_timeout_bsg_job,
773
774
775 .show_host_port_type = 1,
776 .show_host_symbolic_name = 1,
777 .show_host_speed = 1,
778 .show_host_port_id = 1,
779 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
780};
781
