Linux 2.6.37-rc6
[linux-2.6.git] / drivers / scsi / bfa / bfad_im.c
1 /*
2  * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
3  * All rights reserved
4  * www.brocade.com
5  *
6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License (GPL) Version 2 as
10  * published by the Free Software Foundation
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  */
17
18 /*
19  *  bfad_im.c Linux driver IM module.
20  */
21
22 #include "bfad_drv.h"
23 #include "bfad_im.h"
24 #include "bfa_cb_ioim.h"
25 #include "bfa_fcs.h"
26
27 BFA_TRC_FILE(LDRV, IM);
28
29 DEFINE_IDR(bfad_im_port_index);
30 struct scsi_transport_template *bfad_im_scsi_transport_template;
31 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
32 static void bfad_im_itnim_work_handler(struct work_struct *work);
33 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
34 static int bfad_im_slave_alloc(struct scsi_device *sdev);
35 static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
36                                 struct bfad_itnim_s *itnim);
37
38 void
39 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
40                         enum bfi_ioim_status io_status, u8 scsi_status,
41                         int sns_len, u8 *sns_info, s32 residue)
42 {
43         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
44         struct bfad_s         *bfad = drv;
45         struct bfad_itnim_data_s *itnim_data;
46         struct bfad_itnim_s *itnim;
47         u8         host_status = DID_OK;
48
49         switch (io_status) {
50         case BFI_IOIM_STS_OK:
51                 bfa_trc(bfad, scsi_status);
52                 scsi_set_resid(cmnd, 0);
53
54                 if (sns_len > 0) {
55                         bfa_trc(bfad, sns_len);
56                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
57                                 sns_len = SCSI_SENSE_BUFFERSIZE;
58                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
59                 }
60
61                 if (residue > 0) {
62                         bfa_trc(bfad, residue);
63                         scsi_set_resid(cmnd, residue);
64                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
65                                 (scsi_bufflen(cmnd) - residue) <
66                                         cmnd->underflow) {
67                                 bfa_trc(bfad, 0);
68                                 host_status = DID_ERROR;
69                         }
70                 }
71                 cmnd->result = ScsiResult(host_status, scsi_status);
72
73                 break;
74
75         case BFI_IOIM_STS_ABORTED:
76         case BFI_IOIM_STS_TIMEDOUT:
77         case BFI_IOIM_STS_PATHTOV:
78         default:
79                 host_status = DID_ERROR;
80                 cmnd->result = ScsiResult(host_status, 0);
81         }
82
83         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
84         if (cmnd->device->host != NULL)
85                 scsi_dma_unmap(cmnd);
86
87         cmnd->host_scribble = NULL;
88         bfa_trc(bfad, cmnd->result);
89
90         itnim_data = cmnd->device->hostdata;
91         if (itnim_data) {
92                 itnim = itnim_data->itnim;
93                 if (!cmnd->result && itnim &&
94                          (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
95                         /* Queue depth adjustment for good status completion */
96                         bfad_os_ramp_up_qdepth(itnim, cmnd->device);
97                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
98                         /* qfull handling */
99                         bfad_os_handle_qfull(itnim, cmnd->device);
100                 }
101         }
102
103         cmnd->scsi_done(cmnd);
104 }
105
106 void
107 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
108 {
109         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
110         struct bfad_itnim_data_s *itnim_data;
111         struct bfad_itnim_s *itnim;
112
113         cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
114
115         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
116         if (cmnd->device->host != NULL)
117                 scsi_dma_unmap(cmnd);
118
119         cmnd->host_scribble = NULL;
120
121         /* Queue depth adjustment */
122         if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
123                 itnim_data = cmnd->device->hostdata;
124                 if (itnim_data) {
125                         itnim = itnim_data->itnim;
126                         if (itnim)
127                                 bfad_os_ramp_up_qdepth(itnim, cmnd->device);
128                 }
129         }
130
131         cmnd->scsi_done(cmnd);
132 }
133
134 void
135 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
136 {
137         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
138         struct bfad_s         *bfad = drv;
139
140         cmnd->result = ScsiResult(DID_ERROR, 0);
141
142         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
143         if (cmnd->device->host != NULL)
144                 scsi_dma_unmap(cmnd);
145
146         bfa_trc(bfad, cmnd->result);
147         cmnd->host_scribble = NULL;
148 }
149
150 void
151 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
152                    enum bfi_tskim_status tsk_status)
153 {
154         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
155         wait_queue_head_t *wq;
156
157         cmnd->SCp.Status |= tsk_status << 1;
158         set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
159         wq = (wait_queue_head_t *) cmnd->SCp.ptr;
160         cmnd->SCp.ptr = NULL;
161
162         if (wq)
163                 wake_up(wq);
164 }
165
166 /*
167  *  Scsi_Host_template SCSI host template
168  */
169 /*
170  * Scsi_Host template entry, returns BFAD PCI info.
171  */
172 static const char *
173 bfad_im_info(struct Scsi_Host *shost)
174 {
175         static char     bfa_buf[256];
176         struct bfad_im_port_s *im_port =
177                         (struct bfad_im_port_s *) shost->hostdata[0];
178         struct bfad_s *bfad = im_port->bfad;
179         struct bfa_s *bfa = &bfad->bfa;
180         struct bfa_ioc_s *ioc = &bfa->ioc;
181         char model[BFA_ADAPTER_MODEL_NAME_LEN];
182
183         bfa_get_adapter_model(bfa, model);
184
185         memset(bfa_buf, 0, sizeof(bfa_buf));
186         if (ioc->ctdev)
187                 snprintf(bfa_buf, sizeof(bfa_buf),
188                 "Brocade FCOE Adapter, " "model: %s hwpath: %s driver: %s",
189                  model, bfad->pci_name, BFAD_DRIVER_VERSION);
190         else
191                 snprintf(bfa_buf, sizeof(bfa_buf),
192                 "Brocade FC Adapter, " "model: %s hwpath: %s driver: %s",
193                 model, bfad->pci_name, BFAD_DRIVER_VERSION);
194
195         return bfa_buf;
196 }
197
198 /*
199  * Scsi_Host template entry, aborts the specified SCSI command.
200  *
201  * Returns: SUCCESS or FAILED.
202  */
203 static int
204 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
205 {
206         struct Scsi_Host *shost = cmnd->device->host;
207         struct bfad_im_port_s *im_port =
208                         (struct bfad_im_port_s *) shost->hostdata[0];
209         struct bfad_s         *bfad = im_port->bfad;
210         struct bfa_ioim_s *hal_io;
211         unsigned long   flags;
212         u32        timeout;
213         int             rc = FAILED;
214
215         spin_lock_irqsave(&bfad->bfad_lock, flags);
216         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
217         if (!hal_io) {
218                 /* IO has been completed, retrun success */
219                 rc = SUCCESS;
220                 goto out;
221         }
222         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
223                 rc = FAILED;
224                 goto out;
225         }
226
227         bfa_trc(bfad, hal_io->iotag);
228         BFA_LOG(KERN_INFO, bfad, log_level, "scsi%d: abort cmnd %p iotag %x\n",
229                 im_port->shost->host_no, cmnd, hal_io->iotag);
230         (void) bfa_ioim_abort(hal_io);
231         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
232
233         /* Need to wait until the command get aborted */
234         timeout = 10;
235         while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
236                 set_current_state(TASK_UNINTERRUPTIBLE);
237                 schedule_timeout(timeout);
238                 if (timeout < 4 * HZ)
239                         timeout *= 2;
240         }
241
242         cmnd->scsi_done(cmnd);
243         bfa_trc(bfad, hal_io->iotag);
244         BFA_LOG(KERN_INFO, bfad, log_level,
245                 "scsi%d: complete abort 0x%p iotag 0x%x\n",
246                 im_port->shost->host_no, cmnd, hal_io->iotag);
247         return SUCCESS;
248 out:
249         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
250         return rc;
251 }
252
253 static bfa_status_t
254 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
255                      struct bfad_itnim_s *itnim)
256 {
257         struct bfa_tskim_s *tskim;
258         struct bfa_itnim_s *bfa_itnim;
259         bfa_status_t    rc = BFA_STATUS_OK;
260
261         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
262         if (!tskim) {
263                 BFA_LOG(KERN_ERR, bfad, log_level,
264                         "target reset, fail to allocate tskim\n");
265                 rc = BFA_STATUS_FAILED;
266                 goto out;
267         }
268
269         /*
270          * Set host_scribble to NULL to avoid aborting a task command if
271          * happens.
272          */
273         cmnd->host_scribble = NULL;
274         cmnd->SCp.Status = 0;
275         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
276         bfa_tskim_start(tskim, bfa_itnim, (lun_t)0,
277                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
278 out:
279         return rc;
280 }
281
282 /*
283  * Scsi_Host template entry, resets a LUN and abort its all commands.
284  *
285  * Returns: SUCCESS or FAILED.
286  *
287  */
288 static int
289 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
290 {
291         struct Scsi_Host *shost = cmnd->device->host;
292         struct bfad_im_port_s *im_port =
293                         (struct bfad_im_port_s *) shost->hostdata[0];
294         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
295         struct bfad_s         *bfad = im_port->bfad;
296         struct bfa_tskim_s *tskim;
297         struct bfad_itnim_s   *itnim;
298         struct bfa_itnim_s *bfa_itnim;
299         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
300         int             rc = SUCCESS;
301         unsigned long   flags;
302         enum bfi_tskim_status task_status;
303
304         spin_lock_irqsave(&bfad->bfad_lock, flags);
305         itnim = itnim_data->itnim;
306         if (!itnim) {
307                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
308                 rc = FAILED;
309                 goto out;
310         }
311
312         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
313         if (!tskim) {
314                 BFA_LOG(KERN_ERR, bfad, log_level,
315                                 "LUN reset, fail to allocate tskim");
316                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
317                 rc = FAILED;
318                 goto out;
319         }
320
321         /*
322          * Set host_scribble to NULL to avoid aborting a task command
323          * if happens.
324          */
325         cmnd->host_scribble = NULL;
326         cmnd->SCp.ptr = (char *)&wq;
327         cmnd->SCp.Status = 0;
328         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
329         bfa_tskim_start(tskim, bfa_itnim,
330                             bfad_int_to_lun(cmnd->device->lun),
331                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
332         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
333
334         wait_event(wq, test_bit(IO_DONE_BIT,
335                         (unsigned long *)&cmnd->SCp.Status));
336
337         task_status = cmnd->SCp.Status >> 1;
338         if (task_status != BFI_TSKIM_STS_OK) {
339                 BFA_LOG(KERN_ERR, bfad, log_level,
340                         "LUN reset failure, status: %d\n", task_status);
341                 rc = FAILED;
342         }
343
344 out:
345         return rc;
346 }
347
348 /*
349  * Scsi_Host template entry, resets the bus and abort all commands.
350  */
351 static int
352 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
353 {
354         struct Scsi_Host *shost = cmnd->device->host;
355         struct bfad_im_port_s *im_port =
356                                 (struct bfad_im_port_s *) shost->hostdata[0];
357         struct bfad_s         *bfad = im_port->bfad;
358         struct bfad_itnim_s   *itnim;
359         unsigned long   flags;
360         u32        i, rc, err_cnt = 0;
361         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
362         enum bfi_tskim_status task_status;
363
364         spin_lock_irqsave(&bfad->bfad_lock, flags);
365         for (i = 0; i < MAX_FCP_TARGET; i++) {
366                 itnim = bfad_os_get_itnim(im_port, i);
367                 if (itnim) {
368                         cmnd->SCp.ptr = (char *)&wq;
369                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
370                         if (rc != BFA_STATUS_OK) {
371                                 err_cnt++;
372                                 continue;
373                         }
374
375                         /* wait target reset to complete */
376                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
377                         wait_event(wq, test_bit(IO_DONE_BIT,
378                                         (unsigned long *)&cmnd->SCp.Status));
379                         spin_lock_irqsave(&bfad->bfad_lock, flags);
380
381                         task_status = cmnd->SCp.Status >> 1;
382                         if (task_status != BFI_TSKIM_STS_OK) {
383                                 BFA_LOG(KERN_ERR, bfad, log_level,
384                                         "target reset failure,"
385                                         " status: %d\n", task_status);
386                                 err_cnt++;
387                         }
388                 }
389         }
390         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
391
392         if (err_cnt)
393                 return FAILED;
394
395         return SUCCESS;
396 }
397
398 /*
399  * Scsi_Host template entry slave_destroy.
400  */
401 static void
402 bfad_im_slave_destroy(struct scsi_device *sdev)
403 {
404         sdev->hostdata = NULL;
405         return;
406 }
407
408 /*
409  *  BFA FCS itnim callbacks
410  */
411
412 /*
413  * BFA FCS itnim alloc callback, after successful PRLI
414  * Context: Interrupt
415  */
416 void
417 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
418                     struct bfad_itnim_s **itnim_drv)
419 {
420         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
421         if (*itnim_drv == NULL)
422                 return;
423
424         (*itnim_drv)->im = bfad->im;
425         *itnim = &(*itnim_drv)->fcs_itnim;
426         (*itnim_drv)->state = ITNIM_STATE_NONE;
427
428         /*
429          * Initiaze the itnim_work
430          */
431         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
432         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
433 }
434
435 /*
436  * BFA FCS itnim free callback.
437  * Context: Interrupt. bfad_lock is held
438  */
439 void
440 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
441 {
442         struct bfad_port_s    *port;
443         wwn_t wwpn;
444         u32 fcid;
445         char wwpn_str[32], fcid_str[16];
446         struct bfad_im_s        *im = itnim_drv->im;
447
448         /* online to free state transtion should not happen */
449         bfa_assert(itnim_drv->state != ITNIM_STATE_ONLINE);
450
451         itnim_drv->queue_work = 1;
452         /* offline request is not yet done, use the same request to free */
453         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
454                 itnim_drv->queue_work = 0;
455
456         itnim_drv->state = ITNIM_STATE_FREE;
457         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
458         itnim_drv->im_port = port->im_port;
459         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
460         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
461         wwn2str(wwpn_str, wwpn);
462         fcid2str(fcid_str, fcid);
463         BFA_LOG(KERN_INFO, bfad, log_level,
464                 "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
465                 port->im_port->shost->host_no,
466                 fcid_str, wwpn_str);
467
468         /* ITNIM processing */
469         if (itnim_drv->queue_work)
470                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
471 }
472
473 /*
474  * BFA FCS itnim online callback.
475  * Context: Interrupt. bfad_lock is held
476  */
477 void
478 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
479 {
480         struct bfad_port_s    *port;
481         struct bfad_im_s        *im = itnim_drv->im;
482
483         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
484         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
485         itnim_drv->state = ITNIM_STATE_ONLINE;
486         itnim_drv->queue_work = 1;
487         itnim_drv->im_port = port->im_port;
488
489         /* ITNIM processing */
490         if (itnim_drv->queue_work)
491                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
492 }
493
494 /*
495  * BFA FCS itnim offline callback.
496  * Context: Interrupt. bfad_lock is held
497  */
498 void
499 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
500 {
501         struct bfad_port_s    *port;
502         struct bfad_s *bfad;
503         struct bfad_im_s        *im = itnim_drv->im;
504
505         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
506         bfad = port->bfad;
507         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
508                  (port->flags & BFAD_PORT_DELETE)) {
509                 itnim_drv->state = ITNIM_STATE_OFFLINE;
510                 return;
511         }
512         itnim_drv->im_port = port->im_port;
513         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
514         itnim_drv->queue_work = 1;
515
516         /* ITNIM processing */
517         if (itnim_drv->queue_work)
518                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
519 }
520
521 /*
522  * Allocate a Scsi_Host for a port.
523  */
524 int
525 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
526                         struct device *dev)
527 {
528         int error = 1;
529
530         mutex_lock(&bfad_mutex);
531         if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
532                 mutex_unlock(&bfad_mutex);
533                 printk(KERN_WARNING "idr_pre_get failure\n");
534                 goto out;
535         }
536
537         error = idr_get_new(&bfad_im_port_index, im_port,
538                                          &im_port->idr_id);
539         if (error) {
540                 mutex_unlock(&bfad_mutex);
541                 printk(KERN_WARNING "idr_get_new failure\n");
542                 goto out;
543         }
544
545         mutex_unlock(&bfad_mutex);
546
547         im_port->shost = bfad_os_scsi_host_alloc(im_port, bfad);
548         if (!im_port->shost) {
549                 error = 1;
550                 goto out_free_idr;
551         }
552
553         im_port->shost->hostdata[0] = (unsigned long)im_port;
554         im_port->shost->unique_id = im_port->idr_id;
555         im_port->shost->this_id = -1;
556         im_port->shost->max_id = MAX_FCP_TARGET;
557         im_port->shost->max_lun = MAX_FCP_LUN;
558         im_port->shost->max_cmd_len = 16;
559         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
560         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
561                 im_port->shost->transportt = bfad_im_scsi_transport_template;
562         else
563                 im_port->shost->transportt =
564                                 bfad_im_scsi_vport_transport_template;
565
566         error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
567         if (error) {
568                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
569                 goto out_fc_rel;
570         }
571
572         /* setup host fixed attribute if the lk supports */
573         bfad_os_fc_host_init(im_port);
574
575         return 0;
576
577 out_fc_rel:
578         scsi_host_put(im_port->shost);
579         im_port->shost = NULL;
580 out_free_idr:
581         mutex_lock(&bfad_mutex);
582         idr_remove(&bfad_im_port_index, im_port->idr_id);
583         mutex_unlock(&bfad_mutex);
584 out:
585         return error;
586 }
587
588 void
589 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
590 {
591         bfa_trc(bfad, bfad->inst_no);
592         BFA_LOG(KERN_INFO, bfad, log_level, "Free scsi%d\n",
593                         im_port->shost->host_no);
594
595         fc_remove_host(im_port->shost);
596
597         scsi_remove_host(im_port->shost);
598         scsi_host_put(im_port->shost);
599
600         mutex_lock(&bfad_mutex);
601         idr_remove(&bfad_im_port_index, im_port->idr_id);
602         mutex_unlock(&bfad_mutex);
603 }
604
605 static void
606 bfad_im_port_delete_handler(struct work_struct *work)
607 {
608         struct bfad_im_port_s *im_port =
609                 container_of(work, struct bfad_im_port_s, port_delete_work);
610
611         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
612                 im_port->flags |= BFAD_PORT_DELETE;
613                 fc_vport_terminate(im_port->fc_vport);
614         }
615 }
616
617 bfa_status_t
618 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
619 {
620         int             rc = BFA_STATUS_OK;
621         struct bfad_im_port_s *im_port;
622
623         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
624         if (im_port == NULL) {
625                 rc = BFA_STATUS_ENOMEM;
626                 goto ext;
627         }
628         port->im_port = im_port;
629         im_port->port = port;
630         im_port->bfad = bfad;
631
632         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
633         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
634         INIT_LIST_HEAD(&im_port->binding_list);
635
636 ext:
637         return rc;
638 }
639
640 void
641 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
642 {
643         struct bfad_im_port_s *im_port = port->im_port;
644
645         queue_work(bfad->im->drv_workq,
646                                 &im_port->port_delete_work);
647 }
648
649 void
650 bfad_im_port_clean(struct bfad_im_port_s *im_port)
651 {
652         struct bfad_fcp_binding *bp, *bp_new;
653         unsigned long flags;
654         struct bfad_s *bfad =  im_port->bfad;
655
656         spin_lock_irqsave(&bfad->bfad_lock, flags);
657         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
658                                         list_entry) {
659                 list_del(&bp->list_entry);
660                 kfree(bp);
661         }
662
663         /* the itnim_mapped_list must be empty at this time */
664         bfa_assert(list_empty(&im_port->itnim_mapped_list));
665
666         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
667 }
668
669 bfa_status_t
670 bfad_im_probe(struct bfad_s *bfad)
671 {
672         struct bfad_im_s      *im;
673         bfa_status_t    rc = BFA_STATUS_OK;
674
675         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
676         if (im == NULL) {
677                 rc = BFA_STATUS_ENOMEM;
678                 goto ext;
679         }
680
681         bfad->im = im;
682         im->bfad = bfad;
683
684         if (bfad_os_thread_workq(bfad) != BFA_STATUS_OK) {
685                 kfree(im);
686                 rc = BFA_STATUS_FAILED;
687         }
688
689 ext:
690         return rc;
691 }
692
693 void
694 bfad_im_probe_undo(struct bfad_s *bfad)
695 {
696         if (bfad->im) {
697                 bfad_os_destroy_workq(bfad->im);
698                 kfree(bfad->im);
699                 bfad->im = NULL;
700         }
701 }
702
703 struct Scsi_Host *
704 bfad_os_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
705 {
706         struct scsi_host_template *sht;
707
708         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
709                 sht = &bfad_im_scsi_host_template;
710         else
711                 sht = &bfad_im_vport_template;
712
713         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
714
715         return scsi_host_alloc(sht, sizeof(unsigned long));
716 }
717
718 void
719 bfad_os_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
720 {
721         if (!(im_port->flags & BFAD_PORT_DELETE))
722                 flush_workqueue(bfad->im->drv_workq);
723         bfad_im_scsi_host_free(im_port->bfad, im_port);
724         bfad_im_port_clean(im_port);
725         kfree(im_port);
726 }
727
728 void
729 bfad_os_destroy_workq(struct bfad_im_s *im)
730 {
731         if (im && im->drv_workq) {
732                 flush_workqueue(im->drv_workq);
733                 destroy_workqueue(im->drv_workq);
734                 im->drv_workq = NULL;
735         }
736 }
737
738 bfa_status_t
739 bfad_os_thread_workq(struct bfad_s *bfad)
740 {
741         struct bfad_im_s      *im = bfad->im;
742
743         bfa_trc(bfad, 0);
744         snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
745                  bfad->inst_no);
746         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
747         if (!im->drv_workq)
748                 return BFA_STATUS_FAILED;
749
750         return BFA_STATUS_OK;
751 }
752
753 /*
754  * Scsi_Host template entry.
755  *
756  * Description:
757  * OS entry point to adjust the queue_depths on a per-device basis.
758  * Called once per device during the bus scan.
759  * Return non-zero if fails.
760  */
761 static int
762 bfad_im_slave_configure(struct scsi_device *sdev)
763 {
764         if (sdev->tagged_supported)
765                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
766         else
767                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
768
769         return 0;
770 }
771
772 struct scsi_host_template bfad_im_scsi_host_template = {
773         .module = THIS_MODULE,
774         .name = BFAD_DRIVER_NAME,
775         .info = bfad_im_info,
776         .queuecommand = bfad_im_queuecommand,
777         .eh_abort_handler = bfad_im_abort_handler,
778         .eh_device_reset_handler = bfad_im_reset_lun_handler,
779         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
780
781         .slave_alloc = bfad_im_slave_alloc,
782         .slave_configure = bfad_im_slave_configure,
783         .slave_destroy = bfad_im_slave_destroy,
784
785         .this_id = -1,
786         .sg_tablesize = BFAD_IO_MAX_SGE,
787         .cmd_per_lun = 3,
788         .use_clustering = ENABLE_CLUSTERING,
789         .shost_attrs = bfad_im_host_attrs,
790         .max_sectors = 0xFFFF,
791 };
792
793 struct scsi_host_template bfad_im_vport_template = {
794         .module = THIS_MODULE,
795         .name = BFAD_DRIVER_NAME,
796         .info = bfad_im_info,
797         .queuecommand = bfad_im_queuecommand,
798         .eh_abort_handler = bfad_im_abort_handler,
799         .eh_device_reset_handler = bfad_im_reset_lun_handler,
800         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
801
802         .slave_alloc = bfad_im_slave_alloc,
803         .slave_configure = bfad_im_slave_configure,
804         .slave_destroy = bfad_im_slave_destroy,
805
806         .this_id = -1,
807         .sg_tablesize = BFAD_IO_MAX_SGE,
808         .cmd_per_lun = 3,
809         .use_clustering = ENABLE_CLUSTERING,
810         .shost_attrs = bfad_im_vport_attrs,
811         .max_sectors = 0xFFFF,
812 };
813
814 bfa_status_t
815 bfad_im_module_init(void)
816 {
817         bfad_im_scsi_transport_template =
818                 fc_attach_transport(&bfad_im_fc_function_template);
819         if (!bfad_im_scsi_transport_template)
820                 return BFA_STATUS_ENOMEM;
821
822         bfad_im_scsi_vport_transport_template =
823                 fc_attach_transport(&bfad_im_vport_fc_function_template);
824         if (!bfad_im_scsi_vport_transport_template) {
825                 fc_release_transport(bfad_im_scsi_transport_template);
826                 return BFA_STATUS_ENOMEM;
827         }
828
829         return BFA_STATUS_OK;
830 }
831
832 void
833 bfad_im_module_exit(void)
834 {
835         if (bfad_im_scsi_transport_template)
836                 fc_release_transport(bfad_im_scsi_transport_template);
837
838         if (bfad_im_scsi_vport_transport_template)
839                 fc_release_transport(bfad_im_scsi_vport_transport_template);
840 }
841
842 void
843 bfad_os_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
844 {
845         struct scsi_device *tmp_sdev;
846
847         if (((jiffies - itnim->last_ramp_up_time) >
848                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
849                 ((jiffies - itnim->last_queue_full_time) >
850                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
851                 shost_for_each_device(tmp_sdev, sdev->host) {
852                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
853                                 if (tmp_sdev->id != sdev->id)
854                                         continue;
855                                 if (tmp_sdev->ordered_tags)
856                                         scsi_adjust_queue_depth(tmp_sdev,
857                                                 MSG_ORDERED_TAG,
858                                                 tmp_sdev->queue_depth + 1);
859                                 else
860                                         scsi_adjust_queue_depth(tmp_sdev,
861                                                 MSG_SIMPLE_TAG,
862                                                 tmp_sdev->queue_depth + 1);
863
864                                 itnim->last_ramp_up_time = jiffies;
865                         }
866                 }
867         }
868 }
869
870 void
871 bfad_os_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
872 {
873         struct scsi_device *tmp_sdev;
874
875         itnim->last_queue_full_time = jiffies;
876
877         shost_for_each_device(tmp_sdev, sdev->host) {
878                 if (tmp_sdev->id != sdev->id)
879                         continue;
880                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
881         }
882 }
883
884 struct bfad_itnim_s *
885 bfad_os_get_itnim(struct bfad_im_port_s *im_port, int id)
886 {
887         struct bfad_itnim_s   *itnim = NULL;
888
889         /* Search the mapped list for this target ID */
890         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
891                 if (id == itnim->scsi_tgt_id)
892                         return itnim;
893         }
894
895         return NULL;
896 }
897
898 /*
899  * Scsi_Host template entry slave_alloc
900  */
901 static int
902 bfad_im_slave_alloc(struct scsi_device *sdev)
903 {
904         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
905
906         if (!rport || fc_remote_port_chkready(rport))
907                 return -ENXIO;
908
909         sdev->hostdata = rport->dd_data;
910
911         return 0;
912 }
913
914 static u32
915 bfad_im_supported_speeds(struct bfa_s *bfa)
916 {
917         struct bfa_ioc_attr_s *ioc_attr;
918         u32 supported_speed = 0;
919
920         ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
921         if (!ioc_attr)
922                 return 0;
923
924         bfa_get_attr(bfa, ioc_attr);
925         if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
926                 if (ioc_attr->adapter_attr.is_mezz) {
927                         supported_speed |= FC_PORTSPEED_8GBIT |
928                                 FC_PORTSPEED_4GBIT |
929                                 FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
930                 } else {
931                         supported_speed |= FC_PORTSPEED_8GBIT |
932                                 FC_PORTSPEED_4GBIT |
933                                 FC_PORTSPEED_2GBIT;
934                 }
935         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
936                 supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
937                                 FC_PORTSPEED_1GBIT;
938         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
939                 supported_speed |= FC_PORTSPEED_10GBIT;
940         }
941         kfree(ioc_attr);
942         return supported_speed;
943 }
944
945 void
946 bfad_os_fc_host_init(struct bfad_im_port_s *im_port)
947 {
948         struct Scsi_Host *host = im_port->shost;
949         struct bfad_s         *bfad = im_port->bfad;
950         struct bfad_port_s    *port = im_port->port;
951         char symname[BFA_SYMNAME_MAXLEN];
952         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
953
954         fc_host_node_name(host) =
955                 cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
956         fc_host_port_name(host) =
957                 cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
958         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
959
960         fc_host_supported_classes(host) = FC_COS_CLASS3;
961
962         memset(fc_host_supported_fc4s(host), 0,
963                sizeof(fc_host_supported_fc4s(host)));
964         if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
965                 /* For FCP type 0x08 */
966                 fc_host_supported_fc4s(host)[2] = 1;
967         /* For fibre channel services type 0x20 */
968         fc_host_supported_fc4s(host)[7] = 1;
969
970         strncpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
971                 BFA_SYMNAME_MAXLEN);
972         sprintf(fc_host_symbolic_name(host), "%s", symname);
973
974         fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
975         fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
976 }
977
978 static void
979 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
980 {
981         struct fc_rport_identifiers rport_ids;
982         struct fc_rport *fc_rport;
983         struct bfad_itnim_data_s *itnim_data;
984
985         rport_ids.node_name =
986                 cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
987         rport_ids.port_name =
988                 cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
989         rport_ids.port_id =
990                 bfa_os_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
991         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
992
993         itnim->fc_rport = fc_rport =
994                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
995
996         if (!fc_rport)
997                 return;
998
999         fc_rport->maxframe_size =
1000                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1001         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1002
1003         itnim_data = fc_rport->dd_data;
1004         itnim_data->itnim = itnim;
1005
1006         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1007
1008         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1009                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1010
1011         if ((fc_rport->scsi_target_id != -1)
1012             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1013                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1014
1015         return;
1016 }
1017
1018 /*
1019  * Work queue handler using FC transport service
1020 * Context: kernel
1021  */
1022 static void
1023 bfad_im_itnim_work_handler(struct work_struct *work)
1024 {
1025         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1026                                                         itnim_work);
1027         struct bfad_im_s      *im = itnim->im;
1028         struct bfad_s         *bfad = im->bfad;
1029         struct bfad_im_port_s *im_port;
1030         unsigned long   flags;
1031         struct fc_rport *fc_rport;
1032         wwn_t wwpn;
1033         u32 fcid;
1034         char wwpn_str[32], fcid_str[16];
1035
1036         spin_lock_irqsave(&bfad->bfad_lock, flags);
1037         im_port = itnim->im_port;
1038         bfa_trc(bfad, itnim->state);
1039         switch (itnim->state) {
1040         case ITNIM_STATE_ONLINE:
1041                 if (!itnim->fc_rport) {
1042                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1043                         bfad_im_fc_rport_add(im_port, itnim);
1044                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1045                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1046                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1047                         wwn2str(wwpn_str, wwpn);
1048                         fcid2str(fcid_str, fcid);
1049                         list_add_tail(&itnim->list_entry,
1050                                 &im_port->itnim_mapped_list);
1051                         BFA_LOG(KERN_INFO, bfad, log_level,
1052                                 "ITNIM ONLINE Target: %d:0:%d "
1053                                 "FCID: %s WWPN: %s\n",
1054                                 im_port->shost->host_no,
1055                                 itnim->scsi_tgt_id,
1056                                 fcid_str, wwpn_str);
1057                 } else {
1058                         printk(KERN_WARNING
1059                                 "%s: itnim %llx is already in online state\n",
1060                                 __func__,
1061                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1062                 }
1063
1064                 break;
1065         case ITNIM_STATE_OFFLINE_PENDING:
1066                 itnim->state = ITNIM_STATE_OFFLINE;
1067                 if (itnim->fc_rport) {
1068                         fc_rport = itnim->fc_rport;
1069                         ((struct bfad_itnim_data_s *)
1070                                 fc_rport->dd_data)->itnim = NULL;
1071                         itnim->fc_rport = NULL;
1072                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1073                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1074                                 fc_rport->dev_loss_tmo =
1075                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1076                                 fc_remote_port_delete(fc_rport);
1077                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1078                         }
1079                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1080                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1081                         wwn2str(wwpn_str, wwpn);
1082                         fcid2str(fcid_str, fcid);
1083                         list_del(&itnim->list_entry);
1084                         BFA_LOG(KERN_INFO, bfad, log_level,
1085                                 "ITNIM OFFLINE Target: %d:0:%d "
1086                                 "FCID: %s WWPN: %s\n",
1087                                 im_port->shost->host_no,
1088                                 itnim->scsi_tgt_id,
1089                                 fcid_str, wwpn_str);
1090                 }
1091                 break;
1092         case ITNIM_STATE_FREE:
1093                 if (itnim->fc_rport) {
1094                         fc_rport = itnim->fc_rport;
1095                         ((struct bfad_itnim_data_s *)
1096                                 fc_rport->dd_data)->itnim = NULL;
1097                         itnim->fc_rport = NULL;
1098                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1099                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1100                                 fc_rport->dev_loss_tmo =
1101                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1102                                 fc_remote_port_delete(fc_rport);
1103                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1104                         }
1105                         list_del(&itnim->list_entry);
1106                 }
1107
1108                 kfree(itnim);
1109                 break;
1110         default:
1111                 bfa_assert(0);
1112                 break;
1113         }
1114
1115         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1116 }
1117
1118 /*
1119  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1120  */
1121 static int
1122 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1123 {
1124         struct bfad_im_port_s *im_port =
1125                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1126         struct bfad_s         *bfad = im_port->bfad;
1127         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1128         struct bfad_itnim_s   *itnim;
1129         struct bfa_ioim_s *hal_io;
1130         unsigned long   flags;
1131         int             rc;
1132         int       sg_cnt = 0;
1133         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1134
1135         rc = fc_remote_port_chkready(rport);
1136         if (rc) {
1137                 cmnd->result = rc;
1138                 done(cmnd);
1139                 return 0;
1140         }
1141
1142         sg_cnt = scsi_dma_map(cmnd);
1143         if (sg_cnt < 0)
1144                 return SCSI_MLQUEUE_HOST_BUSY;
1145
1146         cmnd->scsi_done = done;
1147
1148         spin_lock_irqsave(&bfad->bfad_lock, flags);
1149         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1150                 printk(KERN_WARNING
1151                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1152                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1153                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1154                 goto out_fail_cmd;
1155         }
1156
1157
1158         itnim = itnim_data->itnim;
1159         if (!itnim) {
1160                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1161                 goto out_fail_cmd;
1162         }
1163
1164         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1165                                     itnim->bfa_itnim, sg_cnt);
1166         if (!hal_io) {
1167                 printk(KERN_WARNING "hal_io failure\n");
1168                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1169                 scsi_dma_unmap(cmnd);
1170                 return SCSI_MLQUEUE_HOST_BUSY;
1171         }
1172
1173         cmnd->host_scribble = (char *)hal_io;
1174         bfa_trc_fp(bfad, hal_io->iotag);
1175         bfa_ioim_start(hal_io);
1176         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1177
1178         return 0;
1179
1180 out_fail_cmd:
1181         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1182         scsi_dma_unmap(cmnd);
1183         if (done)
1184                 done(cmnd);
1185
1186         return 0;
1187 }
1188
1189 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1190
1191 void
1192 bfad_os_rport_online_wait(struct bfad_s *bfad)
1193 {
1194         int i;
1195         int rport_delay = 10;
1196
1197         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1198                 && i < bfa_linkup_delay; i++) {
1199                 set_current_state(TASK_UNINTERRUPTIBLE);
1200                 schedule_timeout(HZ);
1201         }
1202
1203         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1204                 rport_delay = rport_delay < bfa_linkup_delay ?
1205                         rport_delay : bfa_linkup_delay;
1206                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1207                         && i < rport_delay; i++) {
1208                         set_current_state(TASK_UNINTERRUPTIBLE);
1209                         schedule_timeout(HZ);
1210                 }
1211
1212                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1213                         set_current_state(TASK_UNINTERRUPTIBLE);
1214                         schedule_timeout(rport_delay * HZ);
1215                 }
1216         }
1217 }
1218
1219 int
1220 bfad_os_get_linkup_delay(struct bfad_s *bfad)
1221 {
1222         u8              nwwns = 0;
1223         wwn_t           wwns[BFA_PREBOOT_BOOTLUN_MAX];
1224         int             linkup_delay;
1225
1226         /*
1227          * Querying for the boot target port wwns
1228          * -- read from boot information in flash.
1229          * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1230          * else => local boot machine set linkup_delay = 0
1231          */
1232
1233         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1234
1235         if (nwwns > 0)
1236                 /* If Boot over SAN set linkup_delay = 30sec */
1237                 linkup_delay = 30;
1238         else
1239                 /* If local boot; no linkup_delay */
1240                 linkup_delay = 0;
1241
1242         return linkup_delay;
1243 }