This source file includes following definitions.
- zfcp_scsi_slave_destroy
- zfcp_scsi_slave_configure
- zfcp_scsi_command_fail
- zfcp_scsi_queuecommand
- zfcp_scsi_slave_alloc
- zfcp_scsi_eh_abort_handler
- zfcp_scsi_forget_cmnd
- zfcp_scsi_forget_cmnds
- zfcp_scsi_task_mgmt_function
- zfcp_scsi_eh_device_reset_handler
- zfcp_scsi_eh_target_reset_handler
- zfcp_scsi_eh_host_reset_handler
- zfcp_scsi_sysfs_host_reset
- zfcp_scsi_adapter_register
- zfcp_scsi_adapter_unregister
- zfcp_scsi_init_fc_host_stats
- zfcp_scsi_adjust_fc_host_stats
- zfcp_scsi_set_fc_host_stats
- zfcp_scsi_get_fc_host_stats
- zfcp_scsi_reset_fc_host_stats
- zfcp_scsi_get_host_port_state
- zfcp_scsi_set_rport_dev_loss_tmo
- zfcp_scsi_terminate_rport_io
- zfcp_scsi_rport_register
- zfcp_scsi_rport_block
- zfcp_scsi_schedule_rport_register
- zfcp_scsi_schedule_rport_block
- zfcp_scsi_schedule_rports_block
- zfcp_scsi_rport_work
- zfcp_scsi_set_prot
- zfcp_scsi_dif_sense_error
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9
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
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");
27
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)");
31
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)");
35
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");
39
40 static void zfcp_scsi_slave_destroy(struct scsi_device *sdev)
41 {
42 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
43
44
45 if (!zfcp_sdev->port)
46 return;
47
48 zfcp_erp_lun_shutdown_wait(sdev, "scssd_1");
49 put_device(&zfcp_sdev->port->dev);
50 }
51
52 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
53 {
54 if (sdp->tagged_supported)
55 scsi_change_queue_depth(sdp, default_depth);
56 return 0;
57 }
58
59 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
60 {
61 set_host_byte(scpnt, result);
62 zfcp_dbf_scsi_fail_send(scpnt);
63 scpnt->scsi_done(scpnt);
64 }
65
66 static
67 int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
68 {
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;
72
73
74 scpnt->result = 0;
75 scpnt->host_scribble = NULL;
76
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);
82 return 0;
83 }
84
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
90
91 zfcp_scsi_command_fail(scpnt, DID_ERROR);
92 return 0;
93 }
94
95 if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
96
97
98
99
100 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
101 return 0;
102 }
103
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;
109
110 return ret;
111 }
112
113 static int zfcp_scsi_slave_alloc(struct scsi_device *sdev)
114 {
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;
122
123 zfcp_sdev->erp_action.adapter = adapter;
124 zfcp_sdev->erp_action.sdev = sdev;
125
126 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
127 if (!port)
128 return -ENXIO;
129
130 zfcp_sdev->erp_action.port = port;
131
132 mutex_lock(&zfcp_sysfs_port_units_mutex);
133 if (zfcp_sysfs_port_is_removing(port)) {
134
135 mutex_unlock(&zfcp_sysfs_port_units_mutex);
136 put_device(&port->dev);
137 return -ENXIO;
138 }
139 mutex_unlock(&zfcp_sysfs_port_units_mutex);
140
141 unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev));
142 if (unit)
143 put_device(&unit->dev);
144
145 if (!unit && !(allow_lun_scan && npiv)) {
146 put_device(&port->dev);
147 return -ENXIO;
148 }
149
150 zfcp_sdev->port = port;
151 zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF;
152 zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF;
153 zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF;
154 zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF;
155 zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF;
156 zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF;
157 spin_lock_init(&zfcp_sdev->latencies.lock);
158
159 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
160 zfcp_erp_lun_reopen(sdev, 0, "scsla_1");
161 zfcp_erp_wait(port->adapter);
162
163 return 0;
164 }
165
166 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
167 {
168 struct Scsi_Host *scsi_host = scpnt->device->host;
169 struct zfcp_adapter *adapter =
170 (struct zfcp_adapter *) scsi_host->hostdata[0];
171 struct zfcp_fsf_req *old_req, *abrt_req;
172 unsigned long flags;
173 unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
174 int retval = SUCCESS, ret;
175 int retry = 3;
176 char *dbf_tag;
177
178
179 write_lock_irqsave(&adapter->abort_lock, flags);
180
181 old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
182 if (!old_req) {
183 write_unlock_irqrestore(&adapter->abort_lock, flags);
184 zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL);
185 return FAILED;
186 }
187 old_req->data = NULL;
188
189
190 write_unlock_irqrestore(&adapter->abort_lock, flags);
191
192 while (retry--) {
193 abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt);
194 if (abrt_req)
195 break;
196
197 zfcp_dbf_scsi_abort("abrt_wt", scpnt, NULL);
198 zfcp_erp_wait(adapter);
199 ret = fc_block_scsi_eh(scpnt);
200 if (ret) {
201 zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL);
202 return ret;
203 }
204 if (!(atomic_read(&adapter->status) &
205 ZFCP_STATUS_COMMON_RUNNING)) {
206 zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL);
207 return SUCCESS;
208 }
209 }
210 if (!abrt_req) {
211 zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL);
212 return FAILED;
213 }
214
215 wait_for_completion(&abrt_req->completion);
216
217 if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
218 dbf_tag = "abrt_ok";
219 else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
220 dbf_tag = "abrt_nn";
221 else {
222 dbf_tag = "abrt_fa";
223 retval = FAILED;
224 }
225 zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req);
226 zfcp_fsf_req_free(abrt_req);
227 return retval;
228 }
229
230 struct zfcp_scsi_req_filter {
231 u8 tmf_scope;
232 u32 lun_handle;
233 u32 port_handle;
234 };
235
236 static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
237 {
238 struct zfcp_scsi_req_filter *filter =
239 (struct zfcp_scsi_req_filter *)data;
240
241
242 if (old_req->data == NULL ||
243 zfcp_fsf_req_is_status_read_buffer(old_req) ||
244 old_req->qtcb->header.fsf_command != FSF_QTCB_FCP_CMND)
245 return;
246
247
248 if (old_req->qtcb->header.port_handle != filter->port_handle)
249 return;
250
251 if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
252 old_req->qtcb->header.lun_handle != filter->lun_handle)
253 return;
254
255 zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
256 old_req->data = NULL;
257 }
258
259 static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
260 {
261 struct zfcp_adapter *adapter = zsdev->port->adapter;
262 struct zfcp_scsi_req_filter filter = {
263 .tmf_scope = FCP_TMF_TGT_RESET,
264 .port_handle = zsdev->port->handle,
265 };
266 unsigned long flags;
267
268 if (tm_flags == FCP_TMF_LUN_RESET) {
269 filter.tmf_scope = FCP_TMF_LUN_RESET;
270 filter.lun_handle = zsdev->lun_handle;
271 }
272
273
274
275
276
277 write_lock_irqsave(&adapter->abort_lock, flags);
278 zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
279 &filter);
280 write_unlock_irqrestore(&adapter->abort_lock, flags);
281 }
282
283
284
285
286
287
288
289 static int zfcp_scsi_task_mgmt_function(struct scsi_device *sdev, u8 tm_flags)
290 {
291 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
292 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
293 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
294 struct zfcp_fsf_req *fsf_req = NULL;
295 int retval = SUCCESS, ret;
296 int retry = 3;
297
298 while (retry--) {
299 fsf_req = zfcp_fsf_fcp_task_mgmt(sdev, tm_flags);
300 if (fsf_req)
301 break;
302
303 zfcp_dbf_scsi_devreset("wait", sdev, tm_flags, NULL);
304 zfcp_erp_wait(adapter);
305 ret = fc_block_rport(rport);
306 if (ret) {
307 zfcp_dbf_scsi_devreset("fiof", sdev, tm_flags, NULL);
308 return ret;
309 }
310
311 if (!(atomic_read(&adapter->status) &
312 ZFCP_STATUS_COMMON_RUNNING)) {
313 zfcp_dbf_scsi_devreset("nres", sdev, tm_flags, NULL);
314 return SUCCESS;
315 }
316 }
317 if (!fsf_req) {
318 zfcp_dbf_scsi_devreset("reqf", sdev, tm_flags, NULL);
319 return FAILED;
320 }
321
322 wait_for_completion(&fsf_req->completion);
323
324 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
325 zfcp_dbf_scsi_devreset("fail", sdev, tm_flags, fsf_req);
326 retval = FAILED;
327 } else {
328 zfcp_dbf_scsi_devreset("okay", sdev, tm_flags, fsf_req);
329 zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
330 }
331
332 zfcp_fsf_req_free(fsf_req);
333 return retval;
334 }
335
336 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
337 {
338 struct scsi_device *sdev = scpnt->device;
339
340 return zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_LUN_RESET);
341 }
342
343 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
344 {
345 struct scsi_target *starget = scsi_target(scpnt->device);
346 struct fc_rport *rport = starget_to_rport(starget);
347 struct Scsi_Host *shost = rport_to_shost(rport);
348 struct scsi_device *sdev = NULL, *tmp_sdev;
349 struct zfcp_adapter *adapter =
350 (struct zfcp_adapter *)shost->hostdata[0];
351 int ret;
352
353 shost_for_each_device(tmp_sdev, shost) {
354 if (tmp_sdev->id == starget->id) {
355 sdev = tmp_sdev;
356 break;
357 }
358 }
359 if (!sdev) {
360 ret = FAILED;
361 zfcp_dbf_scsi_eh("tr_nosd", adapter, starget->id, ret);
362 return ret;
363 }
364
365 ret = zfcp_scsi_task_mgmt_function(sdev, FCP_TMF_TGT_RESET);
366
367
368 if (sdev)
369 scsi_device_put(tmp_sdev);
370
371 return ret;
372 }
373
374 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
375 {
376 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
377 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
378 int ret = SUCCESS, fc_ret;
379
380 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) {
381 zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p");
382 zfcp_erp_wait(adapter);
383 }
384 zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
385 zfcp_erp_wait(adapter);
386 fc_ret = fc_block_scsi_eh(scpnt);
387 if (fc_ret)
388 ret = fc_ret;
389
390 zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret);
391 return ret;
392 }
393
394
395
396
397
398
399
400
401
402
403 static int zfcp_scsi_sysfs_host_reset(struct Scsi_Host *shost, int reset_type)
404 {
405 struct zfcp_adapter *adapter =
406 (struct zfcp_adapter *)shost->hostdata[0];
407 int ret = 0;
408
409 if (reset_type != SCSI_ADAPTER_RESET) {
410 ret = -EOPNOTSUPP;
411 zfcp_dbf_scsi_eh("scshr_n", adapter, ~0, ret);
412 return ret;
413 }
414
415 zfcp_erp_adapter_reset_sync(adapter, "scshr_y");
416 return ret;
417 }
418
419 struct scsi_transport_template *zfcp_scsi_transport_template;
420
421 static struct scsi_host_template zfcp_scsi_host_template = {
422 .module = THIS_MODULE,
423 .name = "zfcp",
424 .queuecommand = zfcp_scsi_queuecommand,
425 .eh_timed_out = fc_eh_timed_out,
426 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
427 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
428 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
429 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
430 .slave_alloc = zfcp_scsi_slave_alloc,
431 .slave_configure = zfcp_scsi_slave_configure,
432 .slave_destroy = zfcp_scsi_slave_destroy,
433 .change_queue_depth = scsi_change_queue_depth,
434 .host_reset = zfcp_scsi_sysfs_host_reset,
435 .proc_name = "zfcp",
436 .can_queue = 4096,
437 .this_id = -1,
438 .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
439 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2),
440
441 .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
442 * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8,
443
444
445 .max_segment_size = ZFCP_QDIO_SBALE_LEN,
446 .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1,
447 .shost_attrs = zfcp_sysfs_shost_attrs,
448 .sdev_attrs = zfcp_sysfs_sdev_attrs,
449 .track_queue_depth = 1,
450 .supported_mode = MODE_INITIATOR,
451 };
452
453
454
455
456
457 int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
458 {
459 struct ccw_dev_id dev_id;
460
461 if (adapter->scsi_host)
462 return 0;
463
464 ccw_device_get_id(adapter->ccw_device, &dev_id);
465
466 adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
467 sizeof (struct zfcp_adapter *));
468 if (!adapter->scsi_host) {
469 dev_err(&adapter->ccw_device->dev,
470 "Registering the FCP device with the "
471 "SCSI stack failed\n");
472 return -EIO;
473 }
474
475
476 adapter->scsi_host->max_id = 511;
477 adapter->scsi_host->max_lun = 0xFFFFFFFF;
478 adapter->scsi_host->max_channel = 0;
479 adapter->scsi_host->unique_id = dev_id.devno;
480 adapter->scsi_host->max_cmd_len = 16;
481 adapter->scsi_host->transportt = zfcp_scsi_transport_template;
482
483 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
484
485 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
486 scsi_host_put(adapter->scsi_host);
487 return -EIO;
488 }
489
490 return 0;
491 }
492
493
494
495
496
497 void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter)
498 {
499 struct Scsi_Host *shost;
500 struct zfcp_port *port;
501
502 shost = adapter->scsi_host;
503 if (!shost)
504 return;
505
506 read_lock_irq(&adapter->port_list_lock);
507 list_for_each_entry(port, &adapter->port_list, list)
508 port->rport = NULL;
509 read_unlock_irq(&adapter->port_list_lock);
510
511 fc_remove_host(shost);
512 scsi_remove_host(shost);
513 scsi_host_put(shost);
514 adapter->scsi_host = NULL;
515 }
516
517 static struct fc_host_statistics*
518 zfcp_scsi_init_fc_host_stats(struct zfcp_adapter *adapter)
519 {
520 struct fc_host_statistics *fc_stats;
521
522 if (!adapter->fc_stats) {
523 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
524 if (!fc_stats)
525 return NULL;
526 adapter->fc_stats = fc_stats;
527 }
528 memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
529 return adapter->fc_stats;
530 }
531
532 static void zfcp_scsi_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
533 struct fsf_qtcb_bottom_port *data,
534 struct fsf_qtcb_bottom_port *old)
535 {
536 fc_stats->seconds_since_last_reset =
537 data->seconds_since_last_reset - old->seconds_since_last_reset;
538 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
539 fc_stats->tx_words = data->tx_words - old->tx_words;
540 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
541 fc_stats->rx_words = data->rx_words - old->rx_words;
542 fc_stats->lip_count = data->lip - old->lip;
543 fc_stats->nos_count = data->nos - old->nos;
544 fc_stats->error_frames = data->error_frames - old->error_frames;
545 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
546 fc_stats->link_failure_count = data->link_failure - old->link_failure;
547 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
548 fc_stats->loss_of_signal_count =
549 data->loss_of_signal - old->loss_of_signal;
550 fc_stats->prim_seq_protocol_err_count =
551 data->psp_error_counts - old->psp_error_counts;
552 fc_stats->invalid_tx_word_count =
553 data->invalid_tx_words - old->invalid_tx_words;
554 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
555 fc_stats->fcp_input_requests =
556 data->input_requests - old->input_requests;
557 fc_stats->fcp_output_requests =
558 data->output_requests - old->output_requests;
559 fc_stats->fcp_control_requests =
560 data->control_requests - old->control_requests;
561 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
562 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
563 }
564
565 static void zfcp_scsi_set_fc_host_stats(struct fc_host_statistics *fc_stats,
566 struct fsf_qtcb_bottom_port *data)
567 {
568 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
569 fc_stats->tx_frames = data->tx_frames;
570 fc_stats->tx_words = data->tx_words;
571 fc_stats->rx_frames = data->rx_frames;
572 fc_stats->rx_words = data->rx_words;
573 fc_stats->lip_count = data->lip;
574 fc_stats->nos_count = data->nos;
575 fc_stats->error_frames = data->error_frames;
576 fc_stats->dumped_frames = data->dumped_frames;
577 fc_stats->link_failure_count = data->link_failure;
578 fc_stats->loss_of_sync_count = data->loss_of_sync;
579 fc_stats->loss_of_signal_count = data->loss_of_signal;
580 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
581 fc_stats->invalid_tx_word_count = data->invalid_tx_words;
582 fc_stats->invalid_crc_count = data->invalid_crcs;
583 fc_stats->fcp_input_requests = data->input_requests;
584 fc_stats->fcp_output_requests = data->output_requests;
585 fc_stats->fcp_control_requests = data->control_requests;
586 fc_stats->fcp_input_megabytes = data->input_mb;
587 fc_stats->fcp_output_megabytes = data->output_mb;
588 }
589
590 static struct fc_host_statistics *
591 zfcp_scsi_get_fc_host_stats(struct Scsi_Host *host)
592 {
593 struct zfcp_adapter *adapter;
594 struct fc_host_statistics *fc_stats;
595 struct fsf_qtcb_bottom_port *data;
596 int ret;
597
598 adapter = (struct zfcp_adapter *)host->hostdata[0];
599 fc_stats = zfcp_scsi_init_fc_host_stats(adapter);
600 if (!fc_stats)
601 return NULL;
602
603 data = kzalloc(sizeof(*data), GFP_KERNEL);
604 if (!data)
605 return NULL;
606
607 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
608 if (ret) {
609 kfree(data);
610 return NULL;
611 }
612
613 if (adapter->stats_reset &&
614 ((jiffies/HZ - adapter->stats_reset) <
615 data->seconds_since_last_reset))
616 zfcp_scsi_adjust_fc_host_stats(fc_stats, data,
617 adapter->stats_reset_data);
618 else
619 zfcp_scsi_set_fc_host_stats(fc_stats, data);
620
621 kfree(data);
622 return fc_stats;
623 }
624
625 static void zfcp_scsi_reset_fc_host_stats(struct Scsi_Host *shost)
626 {
627 struct zfcp_adapter *adapter;
628 struct fsf_qtcb_bottom_port *data;
629 int ret;
630
631 adapter = (struct zfcp_adapter *)shost->hostdata[0];
632 data = kzalloc(sizeof(*data), GFP_KERNEL);
633 if (!data)
634 return;
635
636 ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
637 if (ret)
638 kfree(data);
639 else {
640 adapter->stats_reset = jiffies/HZ;
641 kfree(adapter->stats_reset_data);
642 adapter->stats_reset_data = data;
643
644 }
645 }
646
647 static void zfcp_scsi_get_host_port_state(struct Scsi_Host *shost)
648 {
649 struct zfcp_adapter *adapter =
650 (struct zfcp_adapter *)shost->hostdata[0];
651 int status = atomic_read(&adapter->status);
652
653 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
654 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
655 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
656 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
657 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
658 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
659 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
660 else
661 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
662 }
663
664 static void zfcp_scsi_set_rport_dev_loss_tmo(struct fc_rport *rport,
665 u32 timeout)
666 {
667 rport->dev_loss_tmo = timeout;
668 }
669
670
671
672
673
674
675
676
677
678
679
680 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
681 {
682 struct zfcp_port *port;
683 struct Scsi_Host *shost = rport_to_shost(rport);
684 struct zfcp_adapter *adapter =
685 (struct zfcp_adapter *)shost->hostdata[0];
686
687 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
688
689 if (port) {
690 zfcp_erp_port_forced_reopen(port, 0, "sctrpi1");
691 put_device(&port->dev);
692 } else {
693 zfcp_erp_port_forced_no_port_dbf(
694 "sctrpin", adapter,
695 rport->port_name ,
696 rport->port_id );
697 }
698 }
699
700 static void zfcp_scsi_rport_register(struct zfcp_port *port)
701 {
702 struct fc_rport_identifiers ids;
703 struct fc_rport *rport;
704
705 if (port->rport)
706 return;
707
708 ids.node_name = port->wwnn;
709 ids.port_name = port->wwpn;
710 ids.port_id = port->d_id;
711 ids.roles = FC_RPORT_ROLE_FCP_TARGET;
712
713 zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
714 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
715 ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
716 rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
717 if (!rport) {
718 dev_err(&port->adapter->ccw_device->dev,
719 "Registering port 0x%016Lx failed\n",
720 (unsigned long long)port->wwpn);
721 return;
722 }
723
724 rport->maxframe_size = port->maxframe_size;
725 rport->supported_classes = port->supported_classes;
726 port->rport = rport;
727 port->starget_id = rport->scsi_target_id;
728
729 zfcp_unit_queue_scsi_scan(port);
730 }
731
732 static void zfcp_scsi_rport_block(struct zfcp_port *port)
733 {
734 struct fc_rport *rport = port->rport;
735
736 if (rport) {
737 zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
738 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
739 ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
740 fc_remote_port_delete(rport);
741 port->rport = NULL;
742 }
743 }
744
745 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
746 {
747 get_device(&port->dev);
748 port->rport_task = RPORT_ADD;
749
750 if (!queue_work(port->adapter->work_queue, &port->rport_work))
751 put_device(&port->dev);
752 }
753
754 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
755 {
756 get_device(&port->dev);
757 port->rport_task = RPORT_DEL;
758
759 if (port->rport && queue_work(port->adapter->work_queue,
760 &port->rport_work))
761 return;
762
763 put_device(&port->dev);
764 }
765
766 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
767 {
768 unsigned long flags;
769 struct zfcp_port *port;
770
771 read_lock_irqsave(&adapter->port_list_lock, flags);
772 list_for_each_entry(port, &adapter->port_list, list)
773 zfcp_scsi_schedule_rport_block(port);
774 read_unlock_irqrestore(&adapter->port_list_lock, flags);
775 }
776
777 void zfcp_scsi_rport_work(struct work_struct *work)
778 {
779 struct zfcp_port *port = container_of(work, struct zfcp_port,
780 rport_work);
781
782 set_worker_desc("zrp%c-%16llx",
783 (port->rport_task == RPORT_ADD) ? 'a' : 'd',
784 port->wwpn);
785 while (port->rport_task) {
786 if (port->rport_task == RPORT_ADD) {
787 port->rport_task = RPORT_NONE;
788 zfcp_scsi_rport_register(port);
789 } else {
790 port->rport_task = RPORT_NONE;
791 zfcp_scsi_rport_block(port);
792 }
793 }
794
795 put_device(&port->dev);
796 }
797
798
799
800
801
802 void zfcp_scsi_set_prot(struct zfcp_adapter *adapter)
803 {
804 unsigned int mask = 0;
805 unsigned int data_div;
806 struct Scsi_Host *shost = adapter->scsi_host;
807
808 data_div = atomic_read(&adapter->status) &
809 ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED;
810
811 if ((enable_dif || zfcp_experimental_dix) &&
812 adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1)
813 mask |= SHOST_DIF_TYPE1_PROTECTION;
814
815 if (zfcp_experimental_dix && data_div &&
816 adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) {
817 mask |= SHOST_DIX_TYPE1_PROTECTION;
818 scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
819 shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2;
820 shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2;
821 shost->max_sectors = shost->sg_tablesize * 8;
822 }
823
824 scsi_host_set_prot(shost, mask);
825 }
826
827
828
829
830
831
832
833
834
835 void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq)
836 {
837 scsi_build_sense_buffer(1, scmd->sense_buffer,
838 ILLEGAL_REQUEST, 0x10, ascq);
839 set_driver_byte(scmd, DRIVER_SENSE);
840 scmd->result |= SAM_STAT_CHECK_CONDITION;
841 set_host_byte(scmd, DID_SOFT_ERROR);
842 }
843
844 struct fc_function_template zfcp_transport_functions = {
845 .show_starget_port_id = 1,
846 .show_starget_port_name = 1,
847 .show_starget_node_name = 1,
848 .show_rport_supported_classes = 1,
849 .show_rport_maxframe_size = 1,
850 .show_rport_dev_loss_tmo = 1,
851 .show_host_node_name = 1,
852 .show_host_port_name = 1,
853 .show_host_permanent_port_name = 1,
854 .show_host_supported_classes = 1,
855 .show_host_supported_fc4s = 1,
856 .show_host_supported_speeds = 1,
857 .show_host_maxframe_size = 1,
858 .show_host_serial_number = 1,
859 .get_fc_host_stats = zfcp_scsi_get_fc_host_stats,
860 .reset_fc_host_stats = zfcp_scsi_reset_fc_host_stats,
861 .set_rport_dev_loss_tmo = zfcp_scsi_set_rport_dev_loss_tmo,
862 .get_host_port_state = zfcp_scsi_get_host_port_state,
863 .terminate_rport_io = zfcp_scsi_terminate_rport_io,
864 .show_host_port_state = 1,
865 .show_host_active_fc4s = 1,
866 .bsg_request = zfcp_fc_exec_bsg_job,
867 .bsg_timeout = zfcp_fc_timeout_bsg_job,
868
869
870 .show_host_port_type = 1,
871 .show_host_symbolic_name = 1,
872 .show_host_speed = 1,
873 .show_host_port_id = 1,
874 .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
875 };