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9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
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>
18#include "zfcp_ext.h"
19#include "zfcp_dbf.h"
20#include "zfcp_fc.h"
21#include "zfcp_reqlist.h"
22
23static unsigned int default_depth = 32;
24module_param_named(queue_depth, default_depth, uint, 0600);
25MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
26
27static bool enable_dif;
28module_param_named(dif, enable_dif, bool, 0400);
29MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support");
30
31static bool allow_lun_scan = 1;
32module_param(allow_lun_scan, bool, 0600);
33MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs");
34
35static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
36 int reason)
37{
38 switch (reason) {
39 case SCSI_QDEPTH_DEFAULT:
40 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
41 break;
42 case SCSI_QDEPTH_QFULL:
43 scsi_track_queue_full(sdev, depth);
44 break;
45 case SCSI_QDEPTH_RAMP_UP:
46 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
47 break;
48 default:
49 return -EOPNOTSUPP;
50 }
51 return sdev->queue_depth;
52}
53
54static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
55{
56 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
57
58
59 if (!zfcp_sdev->port)
60 return;
61
62 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
63 put_device(&zfcp_sdev->port->dev);
64}
65
66static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
67{
68 if (sdp->tagged_supported)
69 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
70 else
71 scsi_adjust_queue_depth(sdp, 0, 1);
72 return 0;
73}
74
75static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
76{
77 set_host_byte(scpnt, result);
78 zfcp_dbf_scsi_fail_send(scpnt);
79 scpnt->scsi_done(scpnt);
80}
81
82static
83int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
84{
85 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
86 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
87 int status, scsi_result, ret;
88
89
90 scpnt->result = 0;
91 scpnt->host_scribble = NULL;
92
93 scsi_result = fc_remote_port_chkready(rport);
94 if (unlikely(scsi_result)) {
95 scpnt->result = scsi_result;
96 zfcp_dbf_scsi_fail_send(scpnt);
97 scpnt->scsi_done(scpnt);
98 return 0;
99 }
100
101 status = atomic_read(&zfcp_sdev->status);
102 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
103 !(atomic_read(&zfcp_sdev->port->status) &
104 ZFCP_STATUS_COMMON_ERP_FAILED)) {
105
106
107 zfcp_scsi_command_fail(scpnt, DID_ERROR);
108 return 0;
109 }
110
111 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
112
113
114
115
116 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
117 return 0;
118 }
119
120 ret = zfcp_fsf_fcp_cmnd(scpnt);
121 if (unlikely(ret == -EBUSY))
122 return SCSI_MLQUEUE_DEVICE_BUSY;
123 else if (unlikely(ret < 0))
124 return SCSI_MLQUEUE_HOST_BUSY;
125
126 return ret;
127}
128
129static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
130{
131 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
132 struct zfcp_adapter *adapter =
133 (struct zfcp_adapter *) sdev->host->hostdata[0];
134 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
135 struct zfcp_port *port;
136 struct zfcp_unit *unit;
137 int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE;
138
139 zfcp_sdev->erp_action.adapter = adapter;
140 zfcp_sdev->erp_action.sdev = sdev;
141
142 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
143 if (!port)
144 return -ENXIO;
145
146 zfcp_sdev->erp_action.port = port;
147
148 mutex_lock(&zfcp_sysfs_port_units_mutex);
149 if (zfcp_sysfs_port_is_removing(port)) {
150
151 mutex_unlock(&zfcp_sysfs_port_units_mutex);
152 put_device(&port->dev);
153 return -ENXIO;
154 }
155 mutex_unlock(&zfcp_sysfs_port_units_mutex);
156
157 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
158 if (unit)
159 put_device(&unit->dev);
160
161 if (!unit && !(allow_lun_scan && npiv)) {
162 put_device(&port->dev);
163 return -ENXIO;
164 }
165
166 zfcp_sdev->port = port;
167 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
168 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
169 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
170 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
171 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
172 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
173 spin_lock_init(&zfcp_sdev->latencies.lock);
174
175 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
176 zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
177 zfcp_erp_wait(port->adapter);
178
179 return 0;
180}
181
182static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
183{
184 struct Scsi_Host *scsi_host = scpnt->device->host;
185 struct zfcp_adapter *adapter =
186 (struct zfcp_adapter *) scsi_host->hostdata[0];
187 struct zfcp_fsf_req *old_req, *abrt_req;
188 unsigned long flags;
189 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
190 int retval = SUCCESS, ret;
191 int retry = 3;
192 char *dbf_tag;
193
194
195 write_lock_irqsave(&adapter->abort_lock, flags);
196
197 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
198 if (!old_req) {
199 write_unlock_irqrestore(&adapter->abort_lock, flags);
200 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
201 return FAILED;
202 }
203 old_req->data = NULL;
204
205
206 write_unlock_irqrestore(&adapter->abort_lock, flags);
207
208 while (retry--) {
209 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
210 if (abrt_req)
211 break;
212
213 zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL);
214 zfcp_erp_wait(adapter);
215 ret = fc_block_scsi_eh(scpnt);
216 if (ret) {
217 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
218 return ret;
219 }
220 if (!(atomic_read(&adapter->status) &
221 ZFCP_STATUS_COMMON_RUNNING)) {
222 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
223 return SUCCESS;
224 }
225 }
226 if (!abrt_req) {
227 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
228 return FAILED;
229 }
230
231 wait_for_completion(&abrt_req->completion);
232
233 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
234 dbf_tag = "abrt_ok";
235 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
236 dbf_tag = "abrt_nn";
237 else {
238 dbf_tag = "abrt_fa";
239 retval = FAILED;
240 }
241 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
242 zfcp_fsf_req_free(abrt_req);
243 return retval;
244}
245
246struct zfcp_scsi_req_filter {
247 u8 tmf_scope;
248 u32 lun_handle;
249 u32 port_handle;
250};
251
252static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
253{
254 struct zfcp_scsi_req_filter *filter =
255 (struct zfcp_scsi_req_filter *)data;
256
257
258 if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
259 return;
260
261
262 if (old_req->qtcb->header.port_handle != filter->port_handle)
263 return;
264
265 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
266 old_req->qtcb->header.lun_handle != filter->lun_handle)
267 return;
268
269 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
270 old_req->data = NULL;
271}
272
273static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
274{
275 struct zfcp_adapter *adapter = zsdev->port->adapter;
276 struct zfcp_scsi_req_filter filter = {
277 .tmf_scope = FCP_TMF_TGT_RESET,
278 .port_handle = zsdev->port->handle,
279 };
280 unsigned long flags;
281
282 if (tm_flags == FCP_TMF_LUN_RESET) {
283 filter.tmf_scope = FCP_TMF_LUN_RESET;
284 filter.lun_handle = zsdev->lun_handle;
285 }
286
287
288
289
290
291 write_lock_irqsave(&adapter->abort_lock, flags);
292 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
293 &filter);
294 write_unlock_irqrestore(&adapter->abort_lock, flags);
295}
296
297static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
298{
299 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
300 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
301 struct zfcp_fsf_req *fsf_req = NULL;
302 int retval = SUCCESS, ret;
303 int retry = 3;
304
305 while (retry--) {
306 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
307 if (fsf_req)
308 break;
309
310 zfcp_dbf_scsi_devreset("wait", scpnt, tm_flags, NULL);
311 zfcp_erp_wait(adapter);
312 ret = fc_block_scsi_eh(scpnt);
313 if (ret) {
314 zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
315 return ret;
316 }
317
318 if (!(atomic_read(&adapter->status) &
319 ZFCP_STATUS_COMMON_RUNNING)) {
320 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags, NULL);
321 return SUCCESS;
322 }
323 }
324 if (!fsf_req) {
325 zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
326 return FAILED;
327 }
328
329 wait_for_completion(&fsf_req->completion);
330
331 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
332 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags, fsf_req);
333 retval = FAILED;
334 } else {
335 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags, fsf_req);
336 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
337 }
338
339 zfcp_fsf_req_free(fsf_req);
340 return retval;
341}
342
343static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
344{
345 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
346}
347
348static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
349{
350 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
351}
352
353static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
354{
355 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
356 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
357 int ret = SUCCESS, fc_ret;
358
359 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) {
360 zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p");
361 zfcp_erp_wait(adapter);
362 }
363 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
364 zfcp_erp_wait(adapter);
365 fc_ret = fc_block_scsi_eh(scpnt);
366 if (fc_ret)
367 ret = fc_ret;
368
369 zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
370 return ret;
371}
372
373struct scsi_transport_template *zfcp_scsi_transport_template;
374
375static struct scsi_host_template zfcp_scsi_host_template = {
376 .module = THIS_MODULE,
377 .name = "zfcp",
378 .queuecommand = zfcp_scsi_queuecommand,
379 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
380 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
381 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
382 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
383 .slave_alloc = zfcp_scsi_slave_alloc,
384 .slave_configure = zfcp_scsi_slave_configure,
385 .slave_destroy = zfcp_scsi_slave_destroy,
386 .change_queue_depth = zfcp_scsi_change_queue_depth,
387 .proc_name = "zfcp",
388 .can_queue = 4096,
389 .this_id = -1,
390 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
391 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
392
393 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
394 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
395
396 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
397 .cmd_per_lun = 1,
398 .use_clustering = 1,
399 .shost_attrs = zfcp_sysfs_shost_attrs,
400 .sdev_attrs = zfcp_sysfs_sdev_attrs,
401};
402
403
404
405
406
407int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
408{
409 struct ccw_dev_id dev_id;
410
411 if (adapter->scsi_host)
412 return 0;
413
414 ccw_device_get_id(adapter->ccw_device, &dev_id);
415
416 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
417 sizeof (struct zfcp_adapter *));
418 if (!adapter->scsi_host) {
419 dev_err(&adapter->ccw_device->dev,
420 "Registering the FCP device with the "
421 "SCSI stack failed\n");
422 return -EIO;
423 }
424
425
426 adapter->scsi_host->max_id = 511;
427 adapter->scsi_host->max_lun = 0xFFFFFFFF;
428 adapter->scsi_host->max_channel = 0;
429 adapter->scsi_host->unique_id = dev_id.devno;
430 adapter->scsi_host->max_cmd_len = 16;
431 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
432
433 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
434
435 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
436 scsi_host_put(adapter->scsi_host);
437 return -EIO;
438 }
439
440 return 0;
441}
442
443
444
445
446
447void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
448{
449 struct Scsi_Host *shost;
450 struct zfcp_port *port;
451
452 shost = adapter->scsi_host;
453 if (!shost)
454 return;
455
456 read_lock_irq(&adapter->port_list_lock);
457 list_for_each_entry(port, &adapter->port_list, list)
458 port->rport = NULL;
459 read_unlock_irq(&adapter->port_list_lock);
460
461 fc_remove_host(shost);
462 scsi_remove_host(shost);
463 scsi_host_put(shost);
464 adapter->scsi_host = NULL;
465}
466
467static struct fc_host_statistics*
468zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
469{
470 struct fc_host_statistics *fc_stats;
471
472 if (!adapter->fc_stats) {
473 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
474 if (!fc_stats)
475 return NULL;
476 adapter->fc_stats = fc_stats;
477 }
478 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
479 return adapter->fc_stats;
480}
481
482static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
483 struct fsf_qtcb_bottom_port *data,
484 struct fsf_qtcb_bottom_port *old)
485{
486 fc_stats->seconds_since_last_reset =
487 data->seconds_since_last_reset - old->seconds_since_last_reset;
488 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
489 fc_stats->tx_words = data->tx_words - old->tx_words;
490 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
491 fc_stats->rx_words = data->rx_words - old->rx_words;
492 fc_stats->lip_count = data->lip - old->lip;
493 fc_stats->nos_count = data->nos - old->nos;
494 fc_stats->error_frames = data->error_frames - old->error_frames;
495 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
496 fc_stats->link_failure_count = data->link_failure - old->link_failure;
497 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
498 fc_stats->loss_of_signal_count =
499 data->loss_of_signal - old->loss_of_signal;
500 fc_stats->prim_seq_protocol_err_count =
501 data->psp_error_counts - old->psp_error_counts;
502 fc_stats->invalid_tx_word_count =
503 data->invalid_tx_words - old->invalid_tx_words;
504 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
505 fc_stats->fcp_input_requests =
506 data->input_requests - old->input_requests;
507 fc_stats->fcp_output_requests =
508 data->output_requests - old->output_requests;
509 fc_stats->fcp_control_requests =
510 data->control_requests - old->control_requests;
511 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
512 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
513}
514
515static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
516 struct fsf_qtcb_bottom_port *data)
517{
518 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
519 fc_stats->tx_frames = data->tx_frames;
520 fc_stats->tx_words = data->tx_words;
521 fc_stats->rx_frames = data->rx_frames;
522 fc_stats->rx_words = data->rx_words;
523 fc_stats->lip_count = data->lip;
524 fc_stats->nos_count = data->nos;
525 fc_stats->error_frames = data->error_frames;
526 fc_stats->dumped_frames = data->dumped_frames;
527 fc_stats->link_failure_count = data->link_failure;
528 fc_stats->loss_of_sync_count = data->loss_of_sync;
529 fc_stats->loss_of_signal_count = data->loss_of_signal;
530 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
531 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
532 fc_stats->invalid_crc_count = data->invalid_crcs;
533 fc_stats->fcp_input_requests = data->input_requests;
534 fc_stats->fcp_output_requests = data->output_requests;
535 fc_stats->fcp_control_requests = data->control_requests;
536 fc_stats->fcp_input_megabytes = data->input_mb;
537 fc_stats->fcp_output_megabytes = data->output_mb;
538}
539
540static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
541{
542 struct zfcp_adapter *adapter;
543 struct fc_host_statistics *fc_stats;
544 struct fsf_qtcb_bottom_port *data;
545 int ret;
546
547 adapter = (struct zfcp_adapter *)host->hostdata[0];
548 fc_stats = zfcp_init_fc_host_stats(adapter);
549 if (!fc_stats)
550 return NULL;
551
552 data = kzalloc(sizeof(*data), GFP_KERNEL);
553 if (!data)
554 return NULL;
555
556 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
557 if (ret) {
558 kfree(data);
559 return NULL;
560 }
561
562 if (adapter->stats_reset &&
563 ((jiffies/HZ - adapter->stats_reset) <
564 data->seconds_since_last_reset))
565 zfcp_adjust_fc_host_stats(fc_stats, data,
566 adapter->stats_reset_data);
567 else
568 zfcp_set_fc_host_stats(fc_stats, data);
569
570 kfree(data);
571 return fc_stats;
572}
573
574static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
575{
576 struct zfcp_adapter *adapter;
577 struct fsf_qtcb_bottom_port *data;
578 int ret;
579
580 adapter = (struct zfcp_adapter *)shost->hostdata[0];
581 data = kzalloc(sizeof(*data), GFP_KERNEL);
582 if (!data)
583 return;
584
585 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
586 if (ret)
587 kfree(data);
588 else {
589 adapter->stats_reset = jiffies/HZ;
590 kfree(adapter->stats_reset_data);
591 adapter->stats_reset_data = data;
592
593 }
594}
595
596static void zfcp_get_host_port_state(struct Scsi_Host *shost)
597{
598 struct zfcp_adapter *adapter =
599 (struct zfcp_adapter *)shost->hostdata[0];
600 int status = atomic_read(&adapter->status);
601
602 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
603 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
604 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
605 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
606 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
607 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
608 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
609 else
610 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
611}
612
613static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
614{
615 rport->dev_loss_tmo = timeout;
616}
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626
627
628static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
629{
630 struct zfcp_port *port;
631 struct Scsi_Host *shost = rport_to_shost(rport);
632 struct zfcp_adapter *adapter =
633 (struct zfcp_adapter *)shost->hostdata[0];
634
635 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
636
637 if (port) {
638 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
639 put_device(&port->dev);
640 } else {
641 zfcp_erp_port_forced_no_port_dbf(
642 "sctrpin", adapter,
643 rport->port_name ,
644 rport->port_id );
645 }
646}
647
648static void zfcp_scsi_rport_register(struct zfcp_port *port)
649{
650 struct fc_rport_identifiers ids;
651 struct fc_rport *rport;
652
653 if (port->rport)
654 return;
655
656 ids.node_name = port->wwnn;
657 ids.port_name = port->wwpn;
658 ids.port_id = port->d_id;
659 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
660
661 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
662 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
663 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
664 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
665 if (!rport) {
666 dev_err(&port->adapter->ccw_device->dev,
667 "Registering port 0x%016Lx failed\n",
668 (unsigned long long)port->wwpn);
669 return;
670 }
671
672 rport->maxframe_size = port->maxframe_size;
673 rport->supported_classes = port->supported_classes;
674 port->rport = rport;
675 port->starget_id = rport->scsi_target_id;
676
677 zfcp_unit_queue_scsi_scan(port);
678}
679
680static void zfcp_scsi_rport_block(struct zfcp_port *port)
681{
682 struct fc_rport *rport = port->rport;
683
684 if (rport) {
685 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
686 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
687 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
688 fc_remote_port_delete(rport);
689 port->rport = NULL;
690 }
691}
692
693void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
694{
695 get_device(&port->dev);
696 port->rport_task = RPORT_ADD;
697
698 if (!queue_work(port->adapter->work_queue, &port->rport_work))
699 put_device(&port->dev);
700}
701
702void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
703{
704 get_device(&port->dev);
705 port->rport_task = RPORT_DEL;
706
707 if (port->rport && queue_work(port->adapter->work_queue,
708 &port->rport_work))
709 return;
710
711 put_device(&port->dev);
712}
713
714void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
715{
716 unsigned long flags;
717 struct zfcp_port *port;
718
719 read_lock_irqsave(&adapter->port_list_lock, flags);
720 list_for_each_entry(port, &adapter->port_list, list)
721 zfcp_scsi_schedule_rport_block(port);
722 read_unlock_irqrestore(&adapter->port_list_lock, flags);
723}
724
725void zfcp_scsi_rport_work(struct work_struct *work)
726{
727 struct zfcp_port *port = container_of(work, struct zfcp_port,
728 rport_work);
729
730 while (port->rport_task) {
731 if (port->rport_task == RPORT_ADD) {
732 port->rport_task = RPORT_NONE;
733 zfcp_scsi_rport_register(port);
734 } else {
735 port->rport_task = RPORT_NONE;
736 zfcp_scsi_rport_block(port);
737 }
738 }
739
740 put_device(&port->dev);
741}
742
743
744
745
746
747void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
748{
749 unsigned int mask = 0;
750 unsigned int data_div;
751 struct Scsi_Host *shost = adapter->scsi_host;
752
753 data_div = atomic_read(&adapter->status) &
754 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
755
756 if (enable_dif &&
757 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
758 mask |= SHOST_DIF_TYPE1_PROTECTION;
759
760 if (enable_dif && data_div &&
761 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
762 mask |= SHOST_DIX_TYPE1_PROTECTION;
763 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
764 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
765 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
766 shost->max_sectors = shost->sg_tablesize * 8;
767 }
768
769 scsi_host_set_prot(shost, mask);
770}
771
772
773
774
775
776
777
778
779
780void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
781{
782 scsi_build_sense_buffer(1, scmd->sense_buffer,
783 ILLEGAL_REQUEST, 0x10, ascq);
784 set_driver_byte(scmd, DRIVER_SENSE);
785 scmd->result |= SAM_STAT_CHECK_CONDITION;
786 set_host_byte(scmd, DID_SOFT_ERROR);
787}
788
789struct fc_function_template zfcp_transport_functions = {
790 .show_starget_port_id = 1,
791 .show_starget_port_name = 1,
792 .show_starget_node_name = 1,
793 .show_rport_supported_classes = 1,
794 .show_rport_maxframe_size = 1,
795 .show_rport_dev_loss_tmo = 1,
796 .show_host_node_name = 1,
797 .show_host_port_name = 1,
798 .show_host_permanent_port_name = 1,
799 .show_host_supported_classes = 1,
800 .show_host_supported_fc4s = 1,
801 .show_host_supported_speeds = 1,
802 .show_host_maxframe_size = 1,
803 .show_host_serial_number = 1,
804 .get_fc_host_stats = zfcp_get_fc_host_stats,
805 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
806 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
807 .get_host_port_state = zfcp_get_host_port_state,
808 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
809 .show_host_port_state = 1,
810 .show_host_active_fc4s = 1,
811 .bsg_request = zfcp_fc_exec_bsg_job,
812 .bsg_timeout = zfcp_fc_timeout_bsg_job,
813
814
815 .show_host_port_type = 1,
816 .show_host_symbolic_name = 1,
817 .show_host_speed = 1,
818 .show_host_port_id = 1,
819 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
820};
821
