Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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, 2010
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 #include "zfcp_reqlist.h"
19
20 static unsigned int default_depth = 32;
21 module_param_named(queue_depth, default_depth, uint, 0600);
22 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
23
24 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
25                                         int reason)
26 {
27         switch (reason) {
28         case SCSI_QDEPTH_DEFAULT:
29                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
30                 break;
31         case SCSI_QDEPTH_QFULL:
32                 scsi_track_queue_full(sdev, depth);
33                 break;
34         case SCSI_QDEPTH_RAMP_UP:
35                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
36                 break;
37         default:
38                 return -EOPNOTSUPP;
39         }
40         return sdev->queue_depth;
41 }
42
43 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
44 {
45         struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
46         unit->device = NULL;
47         put_device(&unit->dev);
48 }
49
50 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
51 {
52         if (sdp->tagged_supported)
53                 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
54         else
55                 scsi_adjust_queue_depth(sdp, 0, 1);
56         return 0;
57 }
58
59 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
60 {
61         struct zfcp_adapter *adapter =
62                 (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
63
64         set_host_byte(scpnt, result);
65         zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
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         scsi_result = fc_remote_port_chkready(rport);
90         if (unlikely(scsi_result)) {
91                 scpnt->result = scsi_result;
92                 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
93                 scpnt->scsi_done(scpnt);
94                 return 0;
95         }
96
97         status = atomic_read(&unit->status);
98         if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
99                      !(atomic_read(&unit->port->status) &
100                        ZFCP_STATUS_COMMON_ERP_FAILED)) {
101                 /* only unit access denied, but port is good
102                  * not covered by FC transport, have to fail here */
103                 zfcp_scsi_command_fail(scpnt, DID_ERROR);
104                 return 0;
105         }
106
107         if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
108                 /* This could be either
109                  * open unit pending: this is temporary, will result in
110                  *      open unit or ERP_FAILED, so retry command
111                  * call to rport_delete pending: mimic retry from
112                  *      fc_remote_port_chkready until rport is BLOCKED
113                  */
114                 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
115                 return 0;
116         }
117
118         ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
119         if (unlikely(ret == -EBUSY))
120                 return SCSI_MLQUEUE_DEVICE_BUSY;
121         else if (unlikely(ret < 0))
122                 return SCSI_MLQUEUE_HOST_BUSY;
123
124         return ret;
125 }
126
127 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
128                                           unsigned int id, u64 lun)
129 {
130         unsigned long flags;
131         struct zfcp_port *port;
132         struct zfcp_unit *unit = NULL;
133
134         read_lock_irqsave(&adapter->port_list_lock, flags);
135         list_for_each_entry(port, &adapter->port_list, list) {
136                 if (!port->rport || (id != port->rport->scsi_target_id))
137                         continue;
138                 unit = zfcp_get_unit_by_lun(port, lun);
139                 if (unit)
140                         break;
141         }
142         read_unlock_irqrestore(&adapter->port_list_lock, flags);
143
144         return unit;
145 }
146
147 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
148 {
149         struct zfcp_adapter *adapter;
150         struct zfcp_unit *unit;
151         u64 lun;
152
153         adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
154         if (!adapter)
155                 goto out;
156
157         int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun);
158         unit = zfcp_unit_lookup(adapter, sdp->id, lun);
159         if (unit) {
160                 sdp->hostdata = unit;
161                 unit->device = sdp;
162                 return 0;
163         }
164 out:
165         return -ENXIO;
166 }
167
168 static 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_unit *unit = scpnt->device->hostdata;
174         struct zfcp_fsf_req *old_req, *abrt_req;
175         unsigned long flags;
176         unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
177         int retval = SUCCESS;
178         int retry = 3;
179         char *dbf_tag;
180
181         /* avoid race condition between late normal completion and abort */
182         write_lock_irqsave(&adapter->abort_lock, flags);
183
184         old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
185         if (!old_req) {
186                 write_unlock_irqrestore(&adapter->abort_lock, flags);
187                 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
188                                     old_reqid);
189                 return FAILED; /* completion could be in progress */
190         }
191         old_req->data = NULL;
192
193         /* don't access old fsf_req after releasing the abort_lock */
194         write_unlock_irqrestore(&adapter->abort_lock, flags);
195
196         while (retry--) {
197                 abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
198                 if (abrt_req)
199                         break;
200
201                 zfcp_erp_wait(adapter);
202                 fc_block_scsi_eh(scpnt);
203                 if (!(atomic_read(&adapter->status) &
204                       ZFCP_STATUS_COMMON_RUNNING)) {
205                         zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
206                                             old_reqid);
207                         return SUCCESS;
208                 }
209         }
210         if (!abrt_req)
211                 return FAILED;
212
213         wait_for_completion(&abrt_req->completion);
214
215         if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
216                 dbf_tag = "okay";
217         else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
218                 dbf_tag = "lte2";
219         else {
220                 dbf_tag = "fail";
221                 retval = FAILED;
222         }
223         zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
224         zfcp_fsf_req_free(abrt_req);
225         return retval;
226 }
227
228 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
229 {
230         struct zfcp_unit *unit = scpnt->device->hostdata;
231         struct zfcp_adapter *adapter = unit->port->adapter;
232         struct zfcp_fsf_req *fsf_req = NULL;
233         int retval = SUCCESS;
234         int retry = 3;
235
236         while (retry--) {
237                 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
238                 if (fsf_req)
239                         break;
240
241                 zfcp_erp_wait(adapter);
242                 fc_block_scsi_eh(scpnt);
243                 if (!(atomic_read(&adapter->status) &
244                       ZFCP_STATUS_COMMON_RUNNING)) {
245                         zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
246                         return SUCCESS;
247                 }
248         }
249         if (!fsf_req)
250                 return FAILED;
251
252         wait_for_completion(&fsf_req->completion);
253
254         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
255                 zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
256                 retval = FAILED;
257         } else
258                 zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
259
260         zfcp_fsf_req_free(fsf_req);
261         return retval;
262 }
263
264 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
265 {
266         return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
267 }
268
269 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
270 {
271         return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
272 }
273
274 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
275 {
276         struct zfcp_unit *unit = scpnt->device->hostdata;
277         struct zfcp_adapter *adapter = unit->port->adapter;
278
279         zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
280         zfcp_erp_wait(adapter);
281         fc_block_scsi_eh(scpnt);
282
283         return SUCCESS;
284 }
285
286 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
287 {
288         struct ccw_dev_id dev_id;
289
290         if (adapter->scsi_host)
291                 return 0;
292
293         ccw_device_get_id(adapter->ccw_device, &dev_id);
294         /* register adapter as SCSI host with mid layer of SCSI stack */
295         adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
296                                              sizeof (struct zfcp_adapter *));
297         if (!adapter->scsi_host) {
298                 dev_err(&adapter->ccw_device->dev,
299                         "Registering the FCP device with the "
300                         "SCSI stack failed\n");
301                 return -EIO;
302         }
303
304         /* tell the SCSI stack some characteristics of this adapter */
305         adapter->scsi_host->max_id = 1;
306         adapter->scsi_host->max_lun = 1;
307         adapter->scsi_host->max_channel = 0;
308         adapter->scsi_host->unique_id = dev_id.devno;
309         adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
310         adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
311
312         adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
313
314         if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
315                 scsi_host_put(adapter->scsi_host);
316                 return -EIO;
317         }
318
319         return 0;
320 }
321
322 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
323 {
324         struct Scsi_Host *shost;
325         struct zfcp_port *port;
326
327         shost = adapter->scsi_host;
328         if (!shost)
329                 return;
330
331         read_lock_irq(&adapter->port_list_lock);
332         list_for_each_entry(port, &adapter->port_list, list)
333                 port->rport = NULL;
334         read_unlock_irq(&adapter->port_list_lock);
335
336         fc_remove_host(shost);
337         scsi_remove_host(shost);
338         scsi_host_put(shost);
339         adapter->scsi_host = NULL;
340
341         return;
342 }
343
344 static struct fc_host_statistics*
345 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
346 {
347         struct fc_host_statistics *fc_stats;
348
349         if (!adapter->fc_stats) {
350                 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
351                 if (!fc_stats)
352                         return NULL;
353                 adapter->fc_stats = fc_stats; /* freed in adapter_release */
354         }
355         memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
356         return adapter->fc_stats;
357 }
358
359 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
360                                       struct fsf_qtcb_bottom_port *data,
361                                       struct fsf_qtcb_bottom_port *old)
362 {
363         fc_stats->seconds_since_last_reset =
364                 data->seconds_since_last_reset - old->seconds_since_last_reset;
365         fc_stats->tx_frames = data->tx_frames - old->tx_frames;
366         fc_stats->tx_words = data->tx_words - old->tx_words;
367         fc_stats->rx_frames = data->rx_frames - old->rx_frames;
368         fc_stats->rx_words = data->rx_words - old->rx_words;
369         fc_stats->lip_count = data->lip - old->lip;
370         fc_stats->nos_count = data->nos - old->nos;
371         fc_stats->error_frames = data->error_frames - old->error_frames;
372         fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
373         fc_stats->link_failure_count = data->link_failure - old->link_failure;
374         fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
375         fc_stats->loss_of_signal_count =
376                 data->loss_of_signal - old->loss_of_signal;
377         fc_stats->prim_seq_protocol_err_count =
378                 data->psp_error_counts - old->psp_error_counts;
379         fc_stats->invalid_tx_word_count =
380                 data->invalid_tx_words - old->invalid_tx_words;
381         fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
382         fc_stats->fcp_input_requests =
383                 data->input_requests - old->input_requests;
384         fc_stats->fcp_output_requests =
385                 data->output_requests - old->output_requests;
386         fc_stats->fcp_control_requests =
387                 data->control_requests - old->control_requests;
388         fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
389         fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
390 }
391
392 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
393                                    struct fsf_qtcb_bottom_port *data)
394 {
395         fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
396         fc_stats->tx_frames = data->tx_frames;
397         fc_stats->tx_words = data->tx_words;
398         fc_stats->rx_frames = data->rx_frames;
399         fc_stats->rx_words = data->rx_words;
400         fc_stats->lip_count = data->lip;
401         fc_stats->nos_count = data->nos;
402         fc_stats->error_frames = data->error_frames;
403         fc_stats->dumped_frames = data->dumped_frames;
404         fc_stats->link_failure_count = data->link_failure;
405         fc_stats->loss_of_sync_count = data->loss_of_sync;
406         fc_stats->loss_of_signal_count = data->loss_of_signal;
407         fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
408         fc_stats->invalid_tx_word_count = data->invalid_tx_words;
409         fc_stats->invalid_crc_count = data->invalid_crcs;
410         fc_stats->fcp_input_requests = data->input_requests;
411         fc_stats->fcp_output_requests = data->output_requests;
412         fc_stats->fcp_control_requests = data->control_requests;
413         fc_stats->fcp_input_megabytes = data->input_mb;
414         fc_stats->fcp_output_megabytes = data->output_mb;
415 }
416
417 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
418 {
419         struct zfcp_adapter *adapter;
420         struct fc_host_statistics *fc_stats;
421         struct fsf_qtcb_bottom_port *data;
422         int ret;
423
424         adapter = (struct zfcp_adapter *)host->hostdata[0];
425         fc_stats = zfcp_init_fc_host_stats(adapter);
426         if (!fc_stats)
427                 return NULL;
428
429         data = kzalloc(sizeof(*data), GFP_KERNEL);
430         if (!data)
431                 return NULL;
432
433         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
434         if (ret) {
435                 kfree(data);
436                 return NULL;
437         }
438
439         if (adapter->stats_reset &&
440             ((jiffies/HZ - adapter->stats_reset) <
441              data->seconds_since_last_reset))
442                 zfcp_adjust_fc_host_stats(fc_stats, data,
443                                           adapter->stats_reset_data);
444         else
445                 zfcp_set_fc_host_stats(fc_stats, data);
446
447         kfree(data);
448         return fc_stats;
449 }
450
451 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
452 {
453         struct zfcp_adapter *adapter;
454         struct fsf_qtcb_bottom_port *data;
455         int ret;
456
457         adapter = (struct zfcp_adapter *)shost->hostdata[0];
458         data = kzalloc(sizeof(*data), GFP_KERNEL);
459         if (!data)
460                 return;
461
462         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
463         if (ret)
464                 kfree(data);
465         else {
466                 adapter->stats_reset = jiffies/HZ;
467                 kfree(adapter->stats_reset_data);
468                 adapter->stats_reset_data = data; /* finally freed in
469                                                      adapter_release */
470         }
471 }
472
473 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
474 {
475         struct zfcp_adapter *adapter =
476                 (struct zfcp_adapter *)shost->hostdata[0];
477         int status = atomic_read(&adapter->status);
478
479         if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
480             !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
481                 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
482         else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
483                 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
484         else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
485                 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
486         else
487                 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
488 }
489
490 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
491 {
492         rport->dev_loss_tmo = timeout;
493 }
494
495 /**
496  * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
497  * @rport: The FC rport where to teminate I/O
498  *
499  * Abort all pending SCSI commands for a port by closing the
500  * port. Using a reopen avoiding a conflict with a shutdown
501  * overwriting a reopen.
502  */
503 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
504 {
505         struct zfcp_port *port;
506         struct Scsi_Host *shost = rport_to_shost(rport);
507         struct zfcp_adapter *adapter =
508                 (struct zfcp_adapter *)shost->hostdata[0];
509
510         port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
511
512         if (port) {
513                 zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
514                 put_device(&port->dev);
515         }
516 }
517
518 static void zfcp_scsi_rport_register(struct zfcp_port *port)
519 {
520         struct fc_rport_identifiers ids;
521         struct fc_rport *rport;
522
523         if (port->rport)
524                 return;
525
526         ids.node_name = port->wwnn;
527         ids.port_name = port->wwpn;
528         ids.port_id = port->d_id;
529         ids.roles = FC_RPORT_ROLE_FCP_TARGET;
530
531         rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
532         if (!rport) {
533                 dev_err(&port->adapter->ccw_device->dev,
534                         "Registering port 0x%016Lx failed\n",
535                         (unsigned long long)port->wwpn);
536                 return;
537         }
538
539         rport->maxframe_size = port->maxframe_size;
540         rport->supported_classes = port->supported_classes;
541         port->rport = rport;
542 }
543
544 static void zfcp_scsi_rport_block(struct zfcp_port *port)
545 {
546         struct fc_rport *rport = port->rport;
547
548         if (rport) {
549                 fc_remote_port_delete(rport);
550                 port->rport = NULL;
551         }
552 }
553
554 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
555 {
556         get_device(&port->dev);
557         port->rport_task = RPORT_ADD;
558
559         if (!queue_work(port->adapter->work_queue, &port->rport_work))
560                 put_device(&port->dev);
561 }
562
563 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
564 {
565         get_device(&port->dev);
566         port->rport_task = RPORT_DEL;
567
568         if (port->rport && queue_work(port->adapter->work_queue,
569                                       &port->rport_work))
570                 return;
571
572         put_device(&port->dev);
573 }
574
575 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
576 {
577         unsigned long flags;
578         struct zfcp_port *port;
579
580         read_lock_irqsave(&adapter->port_list_lock, flags);
581         list_for_each_entry(port, &adapter->port_list, list)
582                 zfcp_scsi_schedule_rport_block(port);
583         read_unlock_irqrestore(&adapter->port_list_lock, flags);
584 }
585
586 void zfcp_scsi_rport_work(struct work_struct *work)
587 {
588         struct zfcp_port *port = container_of(work, struct zfcp_port,
589                                               rport_work);
590
591         while (port->rport_task) {
592                 if (port->rport_task == RPORT_ADD) {
593                         port->rport_task = RPORT_NONE;
594                         zfcp_scsi_rport_register(port);
595                 } else {
596                         port->rport_task = RPORT_NONE;
597                         zfcp_scsi_rport_block(port);
598                 }
599         }
600
601         put_device(&port->dev);
602 }
603
604
605 void zfcp_scsi_scan(struct work_struct *work)
606 {
607         struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
608                                               scsi_work);
609         struct fc_rport *rport;
610
611         flush_work(&unit->port->rport_work);
612         rport = unit->port->rport;
613
614         if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
615                 scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
616                                  scsilun_to_int((struct scsi_lun *)
617                                                 &unit->fcp_lun), 0);
618
619         put_device(&unit->dev);
620 }
621
622 struct fc_function_template zfcp_transport_functions = {
623         .show_starget_port_id = 1,
624         .show_starget_port_name = 1,
625         .show_starget_node_name = 1,
626         .show_rport_supported_classes = 1,
627         .show_rport_maxframe_size = 1,
628         .show_rport_dev_loss_tmo = 1,
629         .show_host_node_name = 1,
630         .show_host_port_name = 1,
631         .show_host_permanent_port_name = 1,
632         .show_host_supported_classes = 1,
633         .show_host_supported_fc4s = 1,
634         .show_host_supported_speeds = 1,
635         .show_host_maxframe_size = 1,
636         .show_host_serial_number = 1,
637         .get_fc_host_stats = zfcp_get_fc_host_stats,
638         .reset_fc_host_stats = zfcp_reset_fc_host_stats,
639         .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
640         .get_host_port_state = zfcp_get_host_port_state,
641         .terminate_rport_io = zfcp_scsi_terminate_rport_io,
642         .show_host_port_state = 1,
643         .show_host_active_fc4s = 1,
644         .bsg_request = zfcp_fc_exec_bsg_job,
645         .bsg_timeout = zfcp_fc_timeout_bsg_job,
646         /* no functions registered for following dynamic attributes but
647            directly set by LLDD */
648         .show_host_port_type = 1,
649         .show_host_speed = 1,
650         .show_host_port_id = 1,
651         .disable_target_scan = 1,
652         .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
653 };
654
655 struct zfcp_data zfcp_data = {
656         .scsi_host_template = {
657                 .name                    = "zfcp",
658                 .module                  = THIS_MODULE,
659                 .proc_name               = "zfcp",
660                 .change_queue_depth      = zfcp_scsi_change_queue_depth,
661                 .slave_alloc             = zfcp_scsi_slave_alloc,
662                 .slave_configure         = zfcp_scsi_slave_configure,
663                 .slave_destroy           = zfcp_scsi_slave_destroy,
664                 .queuecommand            = zfcp_scsi_queuecommand,
665                 .eh_abort_handler        = zfcp_scsi_eh_abort_handler,
666                 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
667                 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
668                 .eh_host_reset_handler   = zfcp_scsi_eh_host_reset_handler,
669                 .can_queue               = 4096,
670                 .this_id                 = -1,
671                 .sg_tablesize            = ZFCP_MAX_SBALES_PER_REQ,
672                 .cmd_per_lun             = 1,
673                 .use_clustering          = 1,
674                 .sdev_attrs              = zfcp_sysfs_sdev_attrs,
675                 .max_sectors             = (ZFCP_MAX_SBALES_PER_REQ * 8),
676                 .shost_attrs             = zfcp_sysfs_shost_attrs,
677         },
678 };