Merge branch 'for-rmk/samsung6' of git://git.fluff.org/bjdooks/linux into devel-stable
[linux-2.6.git] / drivers / s390 / scsi / zfcp_scsi.c
1 /*
2  * zfcp device driver
3  *
4  * Interface to Linux SCSI midlayer.
5  *
6  * Copyright IBM Corporation 2002, 2009
7  */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/types.h>
13 #include <scsi/fc/fc_fcp.h>
14 #include <asm/atomic.h>
15 #include "zfcp_ext.h"
16 #include "zfcp_dbf.h"
17 #include "zfcp_fc.h"
18
19 static unsigned int default_depth = 32;
20 module_param_named(queue_depth, default_depth, uint, 0600);
21 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
22
23 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
24                                         int reason)
25 {
26         switch (reason) {
27         case SCSI_QDEPTH_DEFAULT:
28                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
29                 break;
30         case SCSI_QDEPTH_QFULL:
31                 scsi_track_queue_full(sdev, depth);
32                 break;
33         case SCSI_QDEPTH_RAMP_UP:
34                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
35                 break;
36         default:
37                 return -EOPNOTSUPP;
38         }
39         return sdev->queue_depth;
40 }
41
42 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
43 {
44         struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
45         unit->device = NULL;
46         put_device(&unit->sysfs_device);
47 }
48
49 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
50 {
51         if (sdp->tagged_supported)
52                 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
53         else
54                 scsi_adjust_queue_depth(sdp, 0, 1);
55         return 0;
56 }
57
58 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
59 {
60         struct zfcp_adapter *adapter =
61                 (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
62         set_host_byte(scpnt, result);
63         if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
64                 zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
65         /* return directly */
66         scpnt->scsi_done(scpnt);
67 }
68
69 static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
70                                   void (*done) (struct scsi_cmnd *))
71 {
72         struct zfcp_unit *unit;
73         struct zfcp_adapter *adapter;
74         int    status, scsi_result, ret;
75         struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
76
77         /* reset the status for this request */
78         scpnt->result = 0;
79         scpnt->host_scribble = NULL;
80         scpnt->scsi_done = done;
81
82         /*
83          * figure out adapter and target device
84          * (stored there by zfcp_scsi_slave_alloc)
85          */
86         adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
87         unit = scpnt->device->hostdata;
88
89         BUG_ON(!adapter || (adapter != unit->port->adapter));
90         BUG_ON(!scpnt->scsi_done);
91
92         if (unlikely(!unit)) {
93                 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
94                 return 0;
95         }
96
97         scsi_result = fc_remote_port_chkready(rport);
98         if (unlikely(scsi_result)) {
99                 scpnt->result = scsi_result;
100                 zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
101                 scpnt->scsi_done(scpnt);
102                 return 0;
103         }
104
105         status = atomic_read(&unit->status);
106         if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
107                      !(atomic_read(&unit->port->status) &
108                        ZFCP_STATUS_COMMON_ERP_FAILED)) {
109                 /* only unit access denied, but port is good
110                  * not covered by FC transport, have to fail here */
111                 zfcp_scsi_command_fail(scpnt, DID_ERROR);
112                 return 0;
113         }
114
115         if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
116                 /* This could be either
117                  * open unit pending: this is temporary, will result in
118                  *      open unit or ERP_FAILED, so retry command
119                  * call to rport_delete pending: mimic retry from
120                  *      fc_remote_port_chkready until rport is BLOCKED
121                  */
122                 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
123                 return 0;
124         }
125
126         ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
127         if (unlikely(ret == -EBUSY))
128                 return SCSI_MLQUEUE_DEVICE_BUSY;
129         else if (unlikely(ret < 0))
130                 return SCSI_MLQUEUE_HOST_BUSY;
131
132         return ret;
133 }
134
135 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
136                                           unsigned int id, u64 lun)
137 {
138         unsigned long flags;
139         struct zfcp_port *port;
140         struct zfcp_unit *unit = NULL;
141
142         read_lock_irqsave(&adapter->port_list_lock, flags);
143         list_for_each_entry(port, &adapter->port_list, list) {
144                 if (!port->rport || (id != port->rport->scsi_target_id))
145                         continue;
146                 unit = zfcp_get_unit_by_lun(port, lun);
147                 if (unit)
148                         break;
149         }
150         read_unlock_irqrestore(&adapter->port_list_lock, flags);
151
152         return unit;
153 }
154
155 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
156 {
157         struct zfcp_adapter *adapter;
158         struct zfcp_unit *unit;
159         u64 lun;
160
161         adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
162         if (!adapter)
163                 goto out;
164
165         int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun);
166         unit = zfcp_unit_lookup(adapter, sdp->id, lun);
167         if (unit) {
168                 sdp->hostdata = unit;
169                 unit->device = sdp;
170                 return 0;
171         }
172 out:
173         return -ENXIO;
174 }
175
176 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
177 {
178         struct Scsi_Host *scsi_host = scpnt->device->host;
179         struct zfcp_adapter *adapter =
180                 (struct zfcp_adapter *) scsi_host->hostdata[0];
181         struct zfcp_unit *unit = scpnt->device->hostdata;
182         struct zfcp_fsf_req *old_req, *abrt_req;
183         unsigned long flags;
184         unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
185         int retval = SUCCESS;
186         int retry = 3;
187         char *dbf_tag;
188
189         /* avoid race condition between late normal completion and abort */
190         write_lock_irqsave(&adapter->abort_lock, flags);
191
192         spin_lock(&adapter->req_list_lock);
193         old_req = zfcp_reqlist_find(adapter, old_reqid);
194         spin_unlock(&adapter->req_list_lock);
195         if (!old_req) {
196                 write_unlock_irqrestore(&adapter->abort_lock, flags);
197                 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
198                                     old_reqid);
199                 return FAILED; /* completion could be in progress */
200         }
201         old_req->data = NULL;
202
203         /* don't access old fsf_req after releasing the abort_lock */
204         write_unlock_irqrestore(&adapter->abort_lock, flags);
205
206         while (retry--) {
207                 abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
208                 if (abrt_req)
209                         break;
210
211                 zfcp_erp_wait(adapter);
212                 fc_block_scsi_eh(scpnt);
213                 if (!(atomic_read(&adapter->status) &
214                       ZFCP_STATUS_COMMON_RUNNING)) {
215                         zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
216                                             old_reqid);
217                         return SUCCESS;
218                 }
219         }
220         if (!abrt_req)
221                 return FAILED;
222
223         wait_for_completion(&abrt_req->completion);
224
225         if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
226                 dbf_tag = "okay";
227         else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
228                 dbf_tag = "lte2";
229         else {
230                 dbf_tag = "fail";
231                 retval = FAILED;
232         }
233         zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
234         zfcp_fsf_req_free(abrt_req);
235         return retval;
236 }
237
238 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
239 {
240         struct zfcp_unit *unit = scpnt->device->hostdata;
241         struct zfcp_adapter *adapter = unit->port->adapter;
242         struct zfcp_fsf_req *fsf_req = NULL;
243         int retval = SUCCESS;
244         int retry = 3;
245
246         while (retry--) {
247                 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
248                 if (fsf_req)
249                         break;
250
251                 zfcp_erp_wait(adapter);
252                 fc_block_scsi_eh(scpnt);
253                 if (!(atomic_read(&adapter->status) &
254                       ZFCP_STATUS_COMMON_RUNNING)) {
255                         zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
256                         return SUCCESS;
257                 }
258         }
259         if (!fsf_req)
260                 return FAILED;
261
262         wait_for_completion(&fsf_req->completion);
263
264         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
265                 zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
266                 retval = FAILED;
267         } else
268                 zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
269
270         zfcp_fsf_req_free(fsf_req);
271         return retval;
272 }
273
274 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
275 {
276         return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
277 }
278
279 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
280 {
281         return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
282 }
283
284 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
285 {
286         struct zfcp_unit *unit = scpnt->device->hostdata;
287         struct zfcp_adapter *adapter = unit->port->adapter;
288
289         zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
290         zfcp_erp_wait(adapter);
291         fc_block_scsi_eh(scpnt);
292
293         return SUCCESS;
294 }
295
296 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
297 {
298         struct ccw_dev_id dev_id;
299
300         if (adapter->scsi_host)
301                 return 0;
302
303         ccw_device_get_id(adapter->ccw_device, &dev_id);
304         /* register adapter as SCSI host with mid layer of SCSI stack */
305         adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
306                                              sizeof (struct zfcp_adapter *));
307         if (!adapter->scsi_host) {
308                 dev_err(&adapter->ccw_device->dev,
309                         "Registering the FCP device with the "
310                         "SCSI stack failed\n");
311                 return -EIO;
312         }
313
314         /* tell the SCSI stack some characteristics of this adapter */
315         adapter->scsi_host->max_id = 1;
316         adapter->scsi_host->max_lun = 1;
317         adapter->scsi_host->max_channel = 0;
318         adapter->scsi_host->unique_id = dev_id.devno;
319         adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
320         adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
321
322         adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
323
324         if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
325                 scsi_host_put(adapter->scsi_host);
326                 return -EIO;
327         }
328
329         return 0;
330 }
331
332 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
333 {
334         struct Scsi_Host *shost;
335         struct zfcp_port *port;
336
337         shost = adapter->scsi_host;
338         if (!shost)
339                 return;
340
341         read_lock_irq(&adapter->port_list_lock);
342         list_for_each_entry(port, &adapter->port_list, list)
343                 port->rport = NULL;
344         read_unlock_irq(&adapter->port_list_lock);
345
346         fc_remove_host(shost);
347         scsi_remove_host(shost);
348         scsi_host_put(shost);
349         adapter->scsi_host = NULL;
350
351         return;
352 }
353
354 static struct fc_host_statistics*
355 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
356 {
357         struct fc_host_statistics *fc_stats;
358
359         if (!adapter->fc_stats) {
360                 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
361                 if (!fc_stats)
362                         return NULL;
363                 adapter->fc_stats = fc_stats; /* freed in adapter_release */
364         }
365         memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
366         return adapter->fc_stats;
367 }
368
369 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
370                                       struct fsf_qtcb_bottom_port *data,
371                                       struct fsf_qtcb_bottom_port *old)
372 {
373         fc_stats->seconds_since_last_reset =
374                 data->seconds_since_last_reset - old->seconds_since_last_reset;
375         fc_stats->tx_frames = data->tx_frames - old->tx_frames;
376         fc_stats->tx_words = data->tx_words - old->tx_words;
377         fc_stats->rx_frames = data->rx_frames - old->rx_frames;
378         fc_stats->rx_words = data->rx_words - old->rx_words;
379         fc_stats->lip_count = data->lip - old->lip;
380         fc_stats->nos_count = data->nos - old->nos;
381         fc_stats->error_frames = data->error_frames - old->error_frames;
382         fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
383         fc_stats->link_failure_count = data->link_failure - old->link_failure;
384         fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
385         fc_stats->loss_of_signal_count =
386                 data->loss_of_signal - old->loss_of_signal;
387         fc_stats->prim_seq_protocol_err_count =
388                 data->psp_error_counts - old->psp_error_counts;
389         fc_stats->invalid_tx_word_count =
390                 data->invalid_tx_words - old->invalid_tx_words;
391         fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
392         fc_stats->fcp_input_requests =
393                 data->input_requests - old->input_requests;
394         fc_stats->fcp_output_requests =
395                 data->output_requests - old->output_requests;
396         fc_stats->fcp_control_requests =
397                 data->control_requests - old->control_requests;
398         fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
399         fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
400 }
401
402 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
403                                    struct fsf_qtcb_bottom_port *data)
404 {
405         fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
406         fc_stats->tx_frames = data->tx_frames;
407         fc_stats->tx_words = data->tx_words;
408         fc_stats->rx_frames = data->rx_frames;
409         fc_stats->rx_words = data->rx_words;
410         fc_stats->lip_count = data->lip;
411         fc_stats->nos_count = data->nos;
412         fc_stats->error_frames = data->error_frames;
413         fc_stats->dumped_frames = data->dumped_frames;
414         fc_stats->link_failure_count = data->link_failure;
415         fc_stats->loss_of_sync_count = data->loss_of_sync;
416         fc_stats->loss_of_signal_count = data->loss_of_signal;
417         fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
418         fc_stats->invalid_tx_word_count = data->invalid_tx_words;
419         fc_stats->invalid_crc_count = data->invalid_crcs;
420         fc_stats->fcp_input_requests = data->input_requests;
421         fc_stats->fcp_output_requests = data->output_requests;
422         fc_stats->fcp_control_requests = data->control_requests;
423         fc_stats->fcp_input_megabytes = data->input_mb;
424         fc_stats->fcp_output_megabytes = data->output_mb;
425 }
426
427 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
428 {
429         struct zfcp_adapter *adapter;
430         struct fc_host_statistics *fc_stats;
431         struct fsf_qtcb_bottom_port *data;
432         int ret;
433
434         adapter = (struct zfcp_adapter *)host->hostdata[0];
435         fc_stats = zfcp_init_fc_host_stats(adapter);
436         if (!fc_stats)
437                 return NULL;
438
439         data = kzalloc(sizeof(*data), GFP_KERNEL);
440         if (!data)
441                 return NULL;
442
443         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
444         if (ret) {
445                 kfree(data);
446                 return NULL;
447         }
448
449         if (adapter->stats_reset &&
450             ((jiffies/HZ - adapter->stats_reset) <
451              data->seconds_since_last_reset))
452                 zfcp_adjust_fc_host_stats(fc_stats, data,
453                                           adapter->stats_reset_data);
454         else
455                 zfcp_set_fc_host_stats(fc_stats, data);
456
457         kfree(data);
458         return fc_stats;
459 }
460
461 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
462 {
463         struct zfcp_adapter *adapter;
464         struct fsf_qtcb_bottom_port *data;
465         int ret;
466
467         adapter = (struct zfcp_adapter *)shost->hostdata[0];
468         data = kzalloc(sizeof(*data), GFP_KERNEL);
469         if (!data)
470                 return;
471
472         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
473         if (ret)
474                 kfree(data);
475         else {
476                 adapter->stats_reset = jiffies/HZ;
477                 kfree(adapter->stats_reset_data);
478                 adapter->stats_reset_data = data; /* finally freed in
479                                                      adapter_release */
480         }
481 }
482
483 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
484 {
485         struct zfcp_adapter *adapter =
486                 (struct zfcp_adapter *)shost->hostdata[0];
487         int status = atomic_read(&adapter->status);
488
489         if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
490             !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
491                 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
492         else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
493                 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
494         else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
495                 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
496         else
497                 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
498 }
499
500 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
501 {
502         rport->dev_loss_tmo = timeout;
503 }
504
505 /**
506  * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
507  * @rport: The FC rport where to teminate I/O
508  *
509  * Abort all pending SCSI commands for a port by closing the
510  * port. Using a reopen avoiding a conflict with a shutdown
511  * overwriting a reopen.
512  */
513 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
514 {
515         struct zfcp_port *port;
516         struct Scsi_Host *shost = rport_to_shost(rport);
517         struct zfcp_adapter *adapter =
518                 (struct zfcp_adapter *)shost->hostdata[0];
519
520         port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
521
522         if (port) {
523                 zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
524                 put_device(&port->sysfs_device);
525         }
526 }
527
528 static void zfcp_scsi_rport_register(struct zfcp_port *port)
529 {
530         struct fc_rport_identifiers ids;
531         struct fc_rport *rport;
532
533         if (port->rport)
534                 return;
535
536         ids.node_name = port->wwnn;
537         ids.port_name = port->wwpn;
538         ids.port_id = port->d_id;
539         ids.roles = FC_RPORT_ROLE_FCP_TARGET;
540
541         rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
542         if (!rport) {
543                 dev_err(&port->adapter->ccw_device->dev,
544                         "Registering port 0x%016Lx failed\n",
545                         (unsigned long long)port->wwpn);
546                 return;
547         }
548
549         rport->maxframe_size = port->maxframe_size;
550         rport->supported_classes = port->supported_classes;
551         port->rport = rport;
552 }
553
554 static void zfcp_scsi_rport_block(struct zfcp_port *port)
555 {
556         struct fc_rport *rport = port->rport;
557
558         if (rport) {
559                 fc_remote_port_delete(rport);
560                 port->rport = NULL;
561         }
562 }
563
564 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
565 {
566         get_device(&port->sysfs_device);
567         port->rport_task = RPORT_ADD;
568
569         if (!queue_work(port->adapter->work_queue, &port->rport_work))
570                 put_device(&port->sysfs_device);
571 }
572
573 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
574 {
575         get_device(&port->sysfs_device);
576         port->rport_task = RPORT_DEL;
577
578         if (port->rport && queue_work(port->adapter->work_queue,
579                                       &port->rport_work))
580                 return;
581
582         put_device(&port->sysfs_device);
583 }
584
585 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
586 {
587         unsigned long flags;
588         struct zfcp_port *port;
589
590         read_lock_irqsave(&adapter->port_list_lock, flags);
591         list_for_each_entry(port, &adapter->port_list, list)
592                 zfcp_scsi_schedule_rport_block(port);
593         read_unlock_irqrestore(&adapter->port_list_lock, flags);
594 }
595
596 void zfcp_scsi_rport_work(struct work_struct *work)
597 {
598         struct zfcp_port *port = container_of(work, struct zfcp_port,
599                                               rport_work);
600
601         while (port->rport_task) {
602                 if (port->rport_task == RPORT_ADD) {
603                         port->rport_task = RPORT_NONE;
604                         zfcp_scsi_rport_register(port);
605                 } else {
606                         port->rport_task = RPORT_NONE;
607                         zfcp_scsi_rport_block(port);
608                 }
609         }
610
611         put_device(&port->sysfs_device);
612 }
613
614
615 void zfcp_scsi_scan(struct work_struct *work)
616 {
617         struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
618                                               scsi_work);
619         struct fc_rport *rport;
620
621         flush_work(&unit->port->rport_work);
622         rport = unit->port->rport;
623
624         if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
625                 scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
626                                  scsilun_to_int((struct scsi_lun *)
627                                                 &unit->fcp_lun), 0);
628
629         put_device(&unit->sysfs_device);
630 }
631
632 struct fc_function_template zfcp_transport_functions = {
633         .show_starget_port_id = 1,
634         .show_starget_port_name = 1,
635         .show_starget_node_name = 1,
636         .show_rport_supported_classes = 1,
637         .show_rport_maxframe_size = 1,
638         .show_rport_dev_loss_tmo = 1,
639         .show_host_node_name = 1,
640         .show_host_port_name = 1,
641         .show_host_permanent_port_name = 1,
642         .show_host_supported_classes = 1,
643         .show_host_supported_fc4s = 1,
644         .show_host_supported_speeds = 1,
645         .show_host_maxframe_size = 1,
646         .show_host_serial_number = 1,
647         .get_fc_host_stats = zfcp_get_fc_host_stats,
648         .reset_fc_host_stats = zfcp_reset_fc_host_stats,
649         .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
650         .get_host_port_state = zfcp_get_host_port_state,
651         .terminate_rport_io = zfcp_scsi_terminate_rport_io,
652         .show_host_port_state = 1,
653         .show_host_active_fc4s = 1,
654         .bsg_request = zfcp_fc_exec_bsg_job,
655         .bsg_timeout = zfcp_fc_timeout_bsg_job,
656         /* no functions registered for following dynamic attributes but
657            directly set by LLDD */
658         .show_host_port_type = 1,
659         .show_host_speed = 1,
660         .show_host_port_id = 1,
661         .disable_target_scan = 1,
662         .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
663 };
664
665 struct zfcp_data zfcp_data = {
666         .scsi_host_template = {
667                 .name                    = "zfcp",
668                 .module                  = THIS_MODULE,
669                 .proc_name               = "zfcp",
670                 .change_queue_depth      = zfcp_scsi_change_queue_depth,
671                 .slave_alloc             = zfcp_scsi_slave_alloc,
672                 .slave_configure         = zfcp_scsi_slave_configure,
673                 .slave_destroy           = zfcp_scsi_slave_destroy,
674                 .queuecommand            = zfcp_scsi_queuecommand,
675                 .eh_abort_handler        = zfcp_scsi_eh_abort_handler,
676                 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
677                 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
678                 .eh_host_reset_handler   = zfcp_scsi_eh_host_reset_handler,
679                 .can_queue               = 4096,
680                 .this_id                 = -1,
681                 .sg_tablesize            = ZFCP_MAX_SBALES_PER_REQ,
682                 .cmd_per_lun             = 1,
683                 .use_clustering          = 1,
684                 .sdev_attrs              = zfcp_sysfs_sdev_attrs,
685                 .max_sectors             = (ZFCP_MAX_SBALES_PER_REQ * 8),
686                 .shost_attrs             = zfcp_sysfs_shost_attrs,
687         },
688 };