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[SCSI] zfcp: Use SCSI device data zfcp_scsi_dev instead of zfcp_unit
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_scsi.c
... / ...
CommitLineData
1/*
2 * zfcp device driver
3 *
4 * Interface to Linux SCSI midlayer.
5 *
6 * Copyright IBM Corporation 2002, 2010
7 */
8
9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <scsi/fc/fc_fcp.h>
15#include <scsi/scsi_eh.h>
16#include <asm/atomic.h>
17#include "zfcp_ext.h"
18#include "zfcp_dbf.h"
19#include "zfcp_fc.h"
20#include "zfcp_reqlist.h"
21
22static unsigned int default_depth = 32;
23module_param_named(queue_depth, default_depth, uint, 0600);
24MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
25
26static bool enable_dif;
27
28#ifdef CONFIG_ZFCP_DIF
29module_param_named(dif, enable_dif, bool, 0600);
30MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support");
31#endif
32
33static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
34 int reason)
35{
36 switch (reason) {
37 case SCSI_QDEPTH_DEFAULT:
38 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
39 break;
40 case SCSI_QDEPTH_QFULL:
41 scsi_track_queue_full(sdev, depth);
42 break;
43 case SCSI_QDEPTH_RAMP_UP:
44 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
45 break;
46 default:
47 return -EOPNOTSUPP;
48 }
49 return sdev->queue_depth;
50}
51
52static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
53{
54 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
55
56 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
57 put_device(&zfcp_sdev->port->dev);
58}
59
60static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
61{
62 if (sdp->tagged_supported)
63 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
64 else
65 scsi_adjust_queue_depth(sdp, 0, 1);
66 return 0;
67}
68
69static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
70{
71 struct zfcp_adapter *adapter =
72 (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
73
74 set_host_byte(scpnt, result);
75 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
76 scpnt->scsi_done(scpnt);
77}
78
79static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
80 void (*done) (struct scsi_cmnd *))
81{
82 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
83 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
84 struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
85 int status, scsi_result, ret;
86
87 /* reset the status for this request */
88 scpnt->result = 0;
89 scpnt->host_scribble = NULL;
90 scpnt->scsi_done = done;
91
92 scsi_result = fc_remote_port_chkready(rport);
93 if (unlikely(scsi_result)) {
94 scpnt->result = scsi_result;
95 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
96 scpnt->scsi_done(scpnt);
97 return 0;
98 }
99
100 status = atomic_read(&zfcp_sdev->status);
101 if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
102 !(atomic_read(&zfcp_sdev->port->status) &
103 ZFCP_STATUS_COMMON_ERP_FAILED)) {
104 /* only LUN access denied, but port is good
105 * not covered by FC transport, have to fail here */
106 zfcp_scsi_command_fail(scpnt, DID_ERROR);
107 return 0;
108 }
109
110 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
111 /* This could be either
112 * open LUN pending: this is temporary, will result in
113 * open LUN or ERP_FAILED, so retry command
114 * call to rport_delete pending: mimic retry from
115 * fc_remote_port_chkready until rport is BLOCKED
116 */
117 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
118 return 0;
119 }
120
121 ret = zfcp_fsf_fcp_cmnd(scpnt);
122 if (unlikely(ret == -EBUSY))
123 return SCSI_MLQUEUE_DEVICE_BUSY;
124 else if (unlikely(ret < 0))
125 return SCSI_MLQUEUE_HOST_BUSY;
126
127 return ret;
128}
129
130static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
131{
132 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
133 struct zfcp_adapter *adapter =
134 (struct zfcp_adapter *) sdev->host->hostdata[0];
135 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
136 struct zfcp_port *port;
137 struct zfcp_unit *unit;
138
139 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
140 if (!port)
141 return -ENXIO;
142
143 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
144 if (unit)
145 put_device(&unit->dev);
146 else {
147 put_device(&port->dev);
148 return -ENXIO;
149 }
150
151 zfcp_sdev->port = port;
152 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
153 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
154 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
155 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
156 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
157 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
158 spin_lock_init(&zfcp_sdev->latencies.lock);
159
160 zfcp_erp_modify_lun_status(sdev, "scsla_0", NULL,
161 ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
162 zfcp_erp_lun_reopen(sdev, 0, "scsla_1", NULL);
163 zfcp_erp_wait(port->adapter);
164
165 return 0;
166}
167
168static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
169{
170 struct Scsi_Host *scsi_host = scpnt->device->host;
171 struct zfcp_adapter *adapter =
172 (struct zfcp_adapter *) scsi_host->hostdata[0];
173 struct zfcp_fsf_req *old_req, *abrt_req;
174 unsigned long flags;
175 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
176 int retval = SUCCESS, ret;
177 int retry = 3;
178 char *dbf_tag;
179
180 /* avoid race condition between late normal completion and abort */
181 write_lock_irqsave(&adapter->abort_lock, flags);
182
183 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
184 if (!old_req) {
185 write_unlock_irqrestore(&adapter->abort_lock, flags);
186 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
187 old_reqid);
188 return FAILED; /* completion could be in progress */
189 }
190 old_req->data = NULL;
191
192 /* don't access old fsf_req after releasing the abort_lock */
193 write_unlock_irqrestore(&adapter->abort_lock, flags);
194
195 while (retry--) {
196 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
197 if (abrt_req)
198 break;
199
200 zfcp_erp_wait(adapter);
201 ret = fc_block_scsi_eh(scpnt);
202 if (ret)
203 return ret;
204 if (!(atomic_read(&adapter->status) &
205 ZFCP_STATUS_COMMON_RUNNING)) {
206 zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
207 old_reqid);
208 return SUCCESS;
209 }
210 }
211 if (!abrt_req)
212 return FAILED;
213
214 wait_for_completion(&abrt_req->completion);
215
216 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
217 dbf_tag = "okay";
218 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
219 dbf_tag = "lte2";
220 else {
221 dbf_tag = "fail";
222 retval = FAILED;
223 }
224 zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
225 zfcp_fsf_req_free(abrt_req);
226 return retval;
227}
228
229static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
230{
231 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
232 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
233 struct zfcp_fsf_req *fsf_req = NULL;
234 int retval = SUCCESS, ret;
235 int retry = 3;
236
237 while (retry--) {
238 fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags);
239 if (fsf_req)
240 break;
241
242 zfcp_erp_wait(adapter);
243 ret = fc_block_scsi_eh(scpnt);
244 if (ret)
245 return ret;
246
247 if (!(atomic_read(&adapter->status) &
248 ZFCP_STATUS_COMMON_RUNNING)) {
249 zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags);
250 return SUCCESS;
251 }
252 }
253 if (!fsf_req)
254 return FAILED;
255
256 wait_for_completion(&fsf_req->completion);
257
258 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
259 zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags);
260 retval = FAILED;
261 } else
262 zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags);
263
264 zfcp_fsf_req_free(fsf_req);
265 return retval;
266}
267
268static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
269{
270 return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
271}
272
273static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
274{
275 return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
276}
277
278static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
279{
280 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
281 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
282 int ret;
283
284 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
285 zfcp_erp_wait(adapter);
286 ret = fc_block_scsi_eh(scpnt);
287 if (ret)
288 return ret;
289
290 return SUCCESS;
291}
292
293int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
294{
295 struct ccw_dev_id dev_id;
296
297 if (adapter->scsi_host)
298 return 0;
299
300 ccw_device_get_id(adapter->ccw_device, &dev_id);
301 /* register adapter as SCSI host with mid layer of SCSI stack */
302 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
303 sizeof (struct zfcp_adapter *));
304 if (!adapter->scsi_host) {
305 dev_err(&adapter->ccw_device->dev,
306 "Registering the FCP device with the "
307 "SCSI stack failed\n");
308 return -EIO;
309 }
310
311 /* tell the SCSI stack some characteristics of this adapter */
312 adapter->scsi_host->max_id = 1;
313 adapter->scsi_host->max_lun = 1;
314 adapter->scsi_host->max_channel = 0;
315 adapter->scsi_host->unique_id = dev_id.devno;
316 adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
317 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
318
319 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
320
321 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
322 scsi_host_put(adapter->scsi_host);
323 return -EIO;
324 }
325
326 return 0;
327}
328
329void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
330{
331 struct Scsi_Host *shost;
332 struct zfcp_port *port;
333
334 shost = adapter->scsi_host;
335 if (!shost)
336 return;
337
338 read_lock_irq(&adapter->port_list_lock);
339 list_for_each_entry(port, &adapter->port_list, list)
340 port->rport = NULL;
341 read_unlock_irq(&adapter->port_list_lock);
342
343 fc_remove_host(shost);
344 scsi_remove_host(shost);
345 scsi_host_put(shost);
346 adapter->scsi_host = NULL;
347
348 return;
349}
350
351static struct fc_host_statistics*
352zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
353{
354 struct fc_host_statistics *fc_stats;
355
356 if (!adapter->fc_stats) {
357 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
358 if (!fc_stats)
359 return NULL;
360 adapter->fc_stats = fc_stats; /* freed in adapter_release */
361 }
362 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
363 return adapter->fc_stats;
364}
365
366static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
367 struct fsf_qtcb_bottom_port *data,
368 struct fsf_qtcb_bottom_port *old)
369{
370 fc_stats->seconds_since_last_reset =
371 data->seconds_since_last_reset - old->seconds_since_last_reset;
372 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
373 fc_stats->tx_words = data->tx_words - old->tx_words;
374 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
375 fc_stats->rx_words = data->rx_words - old->rx_words;
376 fc_stats->lip_count = data->lip - old->lip;
377 fc_stats->nos_count = data->nos - old->nos;
378 fc_stats->error_frames = data->error_frames - old->error_frames;
379 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
380 fc_stats->link_failure_count = data->link_failure - old->link_failure;
381 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
382 fc_stats->loss_of_signal_count =
383 data->loss_of_signal - old->loss_of_signal;
384 fc_stats->prim_seq_protocol_err_count =
385 data->psp_error_counts - old->psp_error_counts;
386 fc_stats->invalid_tx_word_count =
387 data->invalid_tx_words - old->invalid_tx_words;
388 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
389 fc_stats->fcp_input_requests =
390 data->input_requests - old->input_requests;
391 fc_stats->fcp_output_requests =
392 data->output_requests - old->output_requests;
393 fc_stats->fcp_control_requests =
394 data->control_requests - old->control_requests;
395 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
396 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
397}
398
399static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
400 struct fsf_qtcb_bottom_port *data)
401{
402 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
403 fc_stats->tx_frames = data->tx_frames;
404 fc_stats->tx_words = data->tx_words;
405 fc_stats->rx_frames = data->rx_frames;
406 fc_stats->rx_words = data->rx_words;
407 fc_stats->lip_count = data->lip;
408 fc_stats->nos_count = data->nos;
409 fc_stats->error_frames = data->error_frames;
410 fc_stats->dumped_frames = data->dumped_frames;
411 fc_stats->link_failure_count = data->link_failure;
412 fc_stats->loss_of_sync_count = data->loss_of_sync;
413 fc_stats->loss_of_signal_count = data->loss_of_signal;
414 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
415 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
416 fc_stats->invalid_crc_count = data->invalid_crcs;
417 fc_stats->fcp_input_requests = data->input_requests;
418 fc_stats->fcp_output_requests = data->output_requests;
419 fc_stats->fcp_control_requests = data->control_requests;
420 fc_stats->fcp_input_megabytes = data->input_mb;
421 fc_stats->fcp_output_megabytes = data->output_mb;
422}
423
424static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
425{
426 struct zfcp_adapter *adapter;
427 struct fc_host_statistics *fc_stats;
428 struct fsf_qtcb_bottom_port *data;
429 int ret;
430
431 adapter = (struct zfcp_adapter *)host->hostdata[0];
432 fc_stats = zfcp_init_fc_host_stats(adapter);
433 if (!fc_stats)
434 return NULL;
435
436 data = kzalloc(sizeof(*data), GFP_KERNEL);
437 if (!data)
438 return NULL;
439
440 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
441 if (ret) {
442 kfree(data);
443 return NULL;
444 }
445
446 if (adapter->stats_reset &&
447 ((jiffies/HZ - adapter->stats_reset) <
448 data->seconds_since_last_reset))
449 zfcp_adjust_fc_host_stats(fc_stats, data,
450 adapter->stats_reset_data);
451 else
452 zfcp_set_fc_host_stats(fc_stats, data);
453
454 kfree(data);
455 return fc_stats;
456}
457
458static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
459{
460 struct zfcp_adapter *adapter;
461 struct fsf_qtcb_bottom_port *data;
462 int ret;
463
464 adapter = (struct zfcp_adapter *)shost->hostdata[0];
465 data = kzalloc(sizeof(*data), GFP_KERNEL);
466 if (!data)
467 return;
468
469 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
470 if (ret)
471 kfree(data);
472 else {
473 adapter->stats_reset = jiffies/HZ;
474 kfree(adapter->stats_reset_data);
475 adapter->stats_reset_data = data; /* finally freed in
476 adapter_release */
477 }
478}
479
480static void zfcp_get_host_port_state(struct Scsi_Host *shost)
481{
482 struct zfcp_adapter *adapter =
483 (struct zfcp_adapter *)shost->hostdata[0];
484 int status = atomic_read(&adapter->status);
485
486 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
487 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
488 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
489 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
490 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
491 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
492 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
493 else
494 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
495}
496
497static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
498{
499 rport->dev_loss_tmo = timeout;
500}
501
502/**
503 * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
504 * @rport: The FC rport where to teminate I/O
505 *
506 * Abort all pending SCSI commands for a port by closing the
507 * port. Using a reopen avoids a conflict with a shutdown
508 * overwriting a reopen. The "forced" ensures that a disappeared port
509 * is not opened again as valid due to the cached plogi data in
510 * non-NPIV mode.
511 */
512static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
513{
514 struct zfcp_port *port;
515 struct Scsi_Host *shost = rport_to_shost(rport);
516 struct zfcp_adapter *adapter =
517 (struct zfcp_adapter *)shost->hostdata[0];
518
519 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
520
521 if (port) {
522 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1", NULL);
523 put_device(&port->dev);
524 }
525}
526
527static void zfcp_scsi_rport_register(struct zfcp_port *port)
528{
529 struct fc_rport_identifiers ids;
530 struct fc_rport *rport;
531
532 if (port->rport)
533 return;
534
535 ids.node_name = port->wwnn;
536 ids.port_name = port->wwpn;
537 ids.port_id = port->d_id;
538 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
539
540 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
541 if (!rport) {
542 dev_err(&port->adapter->ccw_device->dev,
543 "Registering port 0x%016Lx failed\n",
544 (unsigned long long)port->wwpn);
545 return;
546 }
547
548 rport->maxframe_size = port->maxframe_size;
549 rport->supported_classes = port->supported_classes;
550 port->rport = rport;
551 port->starget_id = rport->scsi_target_id;
552
553 zfcp_unit_queue_scsi_scan(port);
554}
555
556static void zfcp_scsi_rport_block(struct zfcp_port *port)
557{
558 struct fc_rport *rport = port->rport;
559
560 if (rport) {
561 fc_remote_port_delete(rport);
562 port->rport = NULL;
563 }
564}
565
566void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
567{
568 get_device(&port->dev);
569 port->rport_task = RPORT_ADD;
570
571 if (!queue_work(port->adapter->work_queue, &port->rport_work))
572 put_device(&port->dev);
573}
574
575void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
576{
577 get_device(&port->dev);
578 port->rport_task = RPORT_DEL;
579
580 if (port->rport && queue_work(port->adapter->work_queue,
581 &port->rport_work))
582 return;
583
584 put_device(&port->dev);
585}
586
587void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
588{
589 unsigned long flags;
590 struct zfcp_port *port;
591
592 read_lock_irqsave(&adapter->port_list_lock, flags);
593 list_for_each_entry(port, &adapter->port_list, list)
594 zfcp_scsi_schedule_rport_block(port);
595 read_unlock_irqrestore(&adapter->port_list_lock, flags);
596}
597
598void zfcp_scsi_rport_work(struct work_struct *work)
599{
600 struct zfcp_port *port = container_of(work, struct zfcp_port,
601 rport_work);
602
603 while (port->rport_task) {
604 if (port->rport_task == RPORT_ADD) {
605 port->rport_task = RPORT_NONE;
606 zfcp_scsi_rport_register(port);
607 } else {
608 port->rport_task = RPORT_NONE;
609 zfcp_scsi_rport_block(port);
610 }
611 }
612
613 put_device(&port->dev);
614}
615
616/**
617 * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host
618 * @adapter: The adapter where to configure DIF/DIX for the SCSI host
619 */
620void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
621{
622 unsigned int mask = 0;
623 unsigned int data_div;
624 struct Scsi_Host *shost = adapter->scsi_host;
625
626 data_div = atomic_read(&adapter->status) &
627 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
628
629 if (enable_dif &&
630 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
631 mask |= SHOST_DIF_TYPE1_PROTECTION;
632
633 if (enable_dif && data_div &&
634 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
635 mask |= SHOST_DIX_TYPE1_PROTECTION;
636 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
637 shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2;
638 shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2;
639 }
640
641 scsi_host_set_prot(shost, mask);
642}
643
644/**
645 * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error
646 * @scmd: The SCSI command to report the error for
647 * @ascq: The ASCQ to put in the sense buffer
648 *
649 * See the error handling in sd_done for the sense codes used here.
650 * Set DID_SOFT_ERROR to retry the request, if possible.
651 */
652void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
653{
654 scsi_build_sense_buffer(1, scmd->sense_buffer,
655 ILLEGAL_REQUEST, 0x10, ascq);
656 set_driver_byte(scmd, DRIVER_SENSE);
657 scmd->result |= SAM_STAT_CHECK_CONDITION;
658 set_host_byte(scmd, DID_SOFT_ERROR);
659}
660
661struct fc_function_template zfcp_transport_functions = {
662 .show_starget_port_id = 1,
663 .show_starget_port_name = 1,
664 .show_starget_node_name = 1,
665 .show_rport_supported_classes = 1,
666 .show_rport_maxframe_size = 1,
667 .show_rport_dev_loss_tmo = 1,
668 .show_host_node_name = 1,
669 .show_host_port_name = 1,
670 .show_host_permanent_port_name = 1,
671 .show_host_supported_classes = 1,
672 .show_host_supported_fc4s = 1,
673 .show_host_supported_speeds = 1,
674 .show_host_maxframe_size = 1,
675 .show_host_serial_number = 1,
676 .get_fc_host_stats = zfcp_get_fc_host_stats,
677 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
678 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
679 .get_host_port_state = zfcp_get_host_port_state,
680 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
681 .show_host_port_state = 1,
682 .show_host_active_fc4s = 1,
683 .bsg_request = zfcp_fc_exec_bsg_job,
684 .bsg_timeout = zfcp_fc_timeout_bsg_job,
685 /* no functions registered for following dynamic attributes but
686 directly set by LLDD */
687 .show_host_port_type = 1,
688 .show_host_speed = 1,
689 .show_host_port_id = 1,
690 .disable_target_scan = 1,
691 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
692};
693
694struct zfcp_data zfcp_data = {
695 .scsi_host_template = {
696 .name = "zfcp",
697 .module = THIS_MODULE,
698 .proc_name = "zfcp",
699 .change_queue_depth = zfcp_scsi_change_queue_depth,
700 .slave_alloc = zfcp_scsi_slave_alloc,
701 .slave_configure = zfcp_scsi_slave_configure,
702 .slave_destroy = zfcp_scsi_slave_destroy,
703 .queuecommand = zfcp_scsi_queuecommand,
704 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
705 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
706 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
707 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
708 .can_queue = 4096,
709 .this_id = -1,
710 .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ,
711 .cmd_per_lun = 1,
712 .use_clustering = 1,
713 .sdev_attrs = zfcp_sysfs_sdev_attrs,
714 .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8),
715 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
716 .shost_attrs = zfcp_sysfs_shost_attrs,
717 },
718};
Linux kernel - Deliverables
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