[SCSI] bfa: remove inactive functions
[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_fcs.h"
25
26 BFA_TRC_FILE(LDRV, IM);
27
28 DEFINE_IDR(bfad_im_port_index);
29 struct scsi_transport_template *bfad_im_scsi_transport_template;
30 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
31 static void bfad_im_itnim_work_handler(struct work_struct *work);
32 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
33 static int bfad_im_slave_alloc(struct scsi_device *sdev);
34 static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
35                                 struct bfad_itnim_s *itnim);
36
37 void
38 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
39                         enum bfi_ioim_status io_status, u8 scsi_status,
40                         int sns_len, u8 *sns_info, s32 residue)
41 {
42         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
43         struct bfad_s         *bfad = drv;
44         struct bfad_itnim_data_s *itnim_data;
45         struct bfad_itnim_s *itnim;
46         u8         host_status = DID_OK;
47
48         switch (io_status) {
49         case BFI_IOIM_STS_OK:
50                 bfa_trc(bfad, scsi_status);
51                 scsi_set_resid(cmnd, 0);
52
53                 if (sns_len > 0) {
54                         bfa_trc(bfad, sns_len);
55                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
56                                 sns_len = SCSI_SENSE_BUFFERSIZE;
57                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
58                 }
59
60                 if (residue > 0) {
61                         bfa_trc(bfad, residue);
62                         scsi_set_resid(cmnd, residue);
63                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
64                                 (scsi_bufflen(cmnd) - residue) <
65                                         cmnd->underflow) {
66                                 bfa_trc(bfad, 0);
67                                 host_status = DID_ERROR;
68                         }
69                 }
70                 cmnd->result = ScsiResult(host_status, scsi_status);
71
72                 break;
73
74         case BFI_IOIM_STS_ABORTED:
75         case BFI_IOIM_STS_TIMEDOUT:
76         case BFI_IOIM_STS_PATHTOV:
77         default:
78                 host_status = DID_ERROR;
79                 cmnd->result = ScsiResult(host_status, 0);
80         }
81
82         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
83         if (cmnd->device->host != NULL)
84                 scsi_dma_unmap(cmnd);
85
86         cmnd->host_scribble = NULL;
87         bfa_trc(bfad, cmnd->result);
88
89         itnim_data = cmnd->device->hostdata;
90         if (itnim_data) {
91                 itnim = itnim_data->itnim;
92                 if (!cmnd->result && itnim &&
93                          (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
94                         /* Queue depth adjustment for good status completion */
95                         bfad_ramp_up_qdepth(itnim, cmnd->device);
96                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
97                         /* qfull handling */
98                         bfad_handle_qfull(itnim, cmnd->device);
99                 }
100         }
101
102         cmnd->scsi_done(cmnd);
103 }
104
105 void
106 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
107 {
108         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
109         struct bfad_itnim_data_s *itnim_data;
110         struct bfad_itnim_s *itnim;
111
112         cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
113
114         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
115         if (cmnd->device->host != NULL)
116                 scsi_dma_unmap(cmnd);
117
118         cmnd->host_scribble = NULL;
119
120         /* Queue depth adjustment */
121         if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
122                 itnim_data = cmnd->device->hostdata;
123                 if (itnim_data) {
124                         itnim = itnim_data->itnim;
125                         if (itnim)
126                                 bfad_ramp_up_qdepth(itnim, cmnd->device);
127                 }
128         }
129
130         cmnd->scsi_done(cmnd);
131 }
132
133 void
134 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
135 {
136         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
137         struct bfad_s         *bfad = drv;
138
139         cmnd->result = ScsiResult(DID_ERROR, 0);
140
141         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
142         if (cmnd->device->host != NULL)
143                 scsi_dma_unmap(cmnd);
144
145         bfa_trc(bfad, cmnd->result);
146         cmnd->host_scribble = NULL;
147 }
148
149 void
150 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
151                    enum bfi_tskim_status tsk_status)
152 {
153         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
154         wait_queue_head_t *wq;
155
156         cmnd->SCp.Status |= tsk_status << 1;
157         set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
158         wq = (wait_queue_head_t *) cmnd->SCp.ptr;
159         cmnd->SCp.ptr = NULL;
160
161         if (wq)
162                 wake_up(wq);
163 }
164
165 /*
166  *  Scsi_Host_template SCSI host template
167  */
168 /*
169  * Scsi_Host template entry, returns BFAD PCI info.
170  */
171 static const char *
172 bfad_im_info(struct Scsi_Host *shost)
173 {
174         static char     bfa_buf[256];
175         struct bfad_im_port_s *im_port =
176                         (struct bfad_im_port_s *) shost->hostdata[0];
177         struct bfad_s *bfad = im_port->bfad;
178         struct bfa_s *bfa = &bfad->bfa;
179         struct bfa_ioc_s *ioc = &bfa->ioc;
180         char model[BFA_ADAPTER_MODEL_NAME_LEN];
181
182         bfa_get_adapter_model(bfa, model);
183
184         memset(bfa_buf, 0, sizeof(bfa_buf));
185         if (ioc->ctdev && !ioc->fcmode)
186                 snprintf(bfa_buf, sizeof(bfa_buf),
187                 "Brocade FCOE Adapter, " "model: %s hwpath: %s driver: %s",
188                  model, bfad->pci_name, BFAD_DRIVER_VERSION);
189         else
190                 snprintf(bfa_buf, sizeof(bfa_buf),
191                 "Brocade FC Adapter, " "model: %s hwpath: %s driver: %s",
192                 model, bfad->pci_name, BFAD_DRIVER_VERSION);
193
194         return bfa_buf;
195 }
196
197 /*
198  * Scsi_Host template entry, aborts the specified SCSI command.
199  *
200  * Returns: SUCCESS or FAILED.
201  */
202 static int
203 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
204 {
205         struct Scsi_Host *shost = cmnd->device->host;
206         struct bfad_im_port_s *im_port =
207                         (struct bfad_im_port_s *) shost->hostdata[0];
208         struct bfad_s         *bfad = im_port->bfad;
209         struct bfa_ioim_s *hal_io;
210         unsigned long   flags;
211         u32        timeout;
212         int             rc = FAILED;
213
214         spin_lock_irqsave(&bfad->bfad_lock, flags);
215         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
216         if (!hal_io) {
217                 /* IO has been completed, retrun success */
218                 rc = SUCCESS;
219                 goto out;
220         }
221         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
222                 rc = FAILED;
223                 goto out;
224         }
225
226         bfa_trc(bfad, hal_io->iotag);
227         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
228                 "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, bfa_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         struct scsi_lun scsilun;
261
262         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
263         if (!tskim) {
264                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
265                         "target reset, fail to allocate tskim\n");
266                 rc = BFA_STATUS_FAILED;
267                 goto out;
268         }
269
270         /*
271          * Set host_scribble to NULL to avoid aborting a task command if
272          * happens.
273          */
274         cmnd->host_scribble = NULL;
275         cmnd->SCp.Status = 0;
276         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
277         memset(&scsilun, 0, sizeof(scsilun));
278         bfa_tskim_start(tskim, bfa_itnim, scsilun,
279                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
280 out:
281         return rc;
282 }
283
284 /*
285  * Scsi_Host template entry, resets a LUN and abort its all commands.
286  *
287  * Returns: SUCCESS or FAILED.
288  *
289  */
290 static int
291 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
292 {
293         struct Scsi_Host *shost = cmnd->device->host;
294         struct bfad_im_port_s *im_port =
295                         (struct bfad_im_port_s *) shost->hostdata[0];
296         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
297         struct bfad_s         *bfad = im_port->bfad;
298         struct bfa_tskim_s *tskim;
299         struct bfad_itnim_s   *itnim;
300         struct bfa_itnim_s *bfa_itnim;
301         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
302         int             rc = SUCCESS;
303         unsigned long   flags;
304         enum bfi_tskim_status task_status;
305         struct scsi_lun scsilun;
306
307         spin_lock_irqsave(&bfad->bfad_lock, flags);
308         itnim = itnim_data->itnim;
309         if (!itnim) {
310                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
311                 rc = FAILED;
312                 goto out;
313         }
314
315         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
316         if (!tskim) {
317                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
318                                 "LUN reset, fail to allocate tskim");
319                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
320                 rc = FAILED;
321                 goto out;
322         }
323
324         /*
325          * Set host_scribble to NULL to avoid aborting a task command
326          * if happens.
327          */
328         cmnd->host_scribble = NULL;
329         cmnd->SCp.ptr = (char *)&wq;
330         cmnd->SCp.Status = 0;
331         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
332         int_to_scsilun(cmnd->device->lun, &scsilun);
333         bfa_tskim_start(tskim, bfa_itnim, scsilun,
334                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
335         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
336
337         wait_event(wq, test_bit(IO_DONE_BIT,
338                         (unsigned long *)&cmnd->SCp.Status));
339
340         task_status = cmnd->SCp.Status >> 1;
341         if (task_status != BFI_TSKIM_STS_OK) {
342                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
343                         "LUN reset failure, status: %d\n", task_status);
344                 rc = FAILED;
345         }
346
347 out:
348         return rc;
349 }
350
351 /*
352  * Scsi_Host template entry, resets the bus and abort all commands.
353  */
354 static int
355 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
356 {
357         struct Scsi_Host *shost = cmnd->device->host;
358         struct bfad_im_port_s *im_port =
359                                 (struct bfad_im_port_s *) shost->hostdata[0];
360         struct bfad_s         *bfad = im_port->bfad;
361         struct bfad_itnim_s   *itnim;
362         unsigned long   flags;
363         u32        i, rc, err_cnt = 0;
364         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
365         enum bfi_tskim_status task_status;
366
367         spin_lock_irqsave(&bfad->bfad_lock, flags);
368         for (i = 0; i < MAX_FCP_TARGET; i++) {
369                 itnim = bfad_get_itnim(im_port, i);
370                 if (itnim) {
371                         cmnd->SCp.ptr = (char *)&wq;
372                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
373                         if (rc != BFA_STATUS_OK) {
374                                 err_cnt++;
375                                 continue;
376                         }
377
378                         /* wait target reset to complete */
379                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
380                         wait_event(wq, test_bit(IO_DONE_BIT,
381                                         (unsigned long *)&cmnd->SCp.Status));
382                         spin_lock_irqsave(&bfad->bfad_lock, flags);
383
384                         task_status = cmnd->SCp.Status >> 1;
385                         if (task_status != BFI_TSKIM_STS_OK) {
386                                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
387                                         "target reset failure,"
388                                         " status: %d\n", task_status);
389                                 err_cnt++;
390                         }
391                 }
392         }
393         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
394
395         if (err_cnt)
396                 return FAILED;
397
398         return SUCCESS;
399 }
400
401 /*
402  * Scsi_Host template entry slave_destroy.
403  */
404 static void
405 bfad_im_slave_destroy(struct scsi_device *sdev)
406 {
407         sdev->hostdata = NULL;
408         return;
409 }
410
411 /*
412  *  BFA FCS itnim callbacks
413  */
414
415 /*
416  * BFA FCS itnim alloc callback, after successful PRLI
417  * Context: Interrupt
418  */
419 void
420 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
421                     struct bfad_itnim_s **itnim_drv)
422 {
423         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
424         if (*itnim_drv == NULL)
425                 return;
426
427         (*itnim_drv)->im = bfad->im;
428         *itnim = &(*itnim_drv)->fcs_itnim;
429         (*itnim_drv)->state = ITNIM_STATE_NONE;
430
431         /*
432          * Initiaze the itnim_work
433          */
434         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
435         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
436 }
437
438 /*
439  * BFA FCS itnim free callback.
440  * Context: Interrupt. bfad_lock is held
441  */
442 void
443 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
444 {
445         struct bfad_port_s    *port;
446         wwn_t wwpn;
447         u32 fcid;
448         char wwpn_str[32], fcid_str[16];
449         struct bfad_im_s        *im = itnim_drv->im;
450
451         /* online to free state transtion should not happen */
452         WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
453
454         itnim_drv->queue_work = 1;
455         /* offline request is not yet done, use the same request to free */
456         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
457                 itnim_drv->queue_work = 0;
458
459         itnim_drv->state = ITNIM_STATE_FREE;
460         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
461         itnim_drv->im_port = port->im_port;
462         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
463         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
464         wwn2str(wwpn_str, wwpn);
465         fcid2str(fcid_str, fcid);
466         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
467                 "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
468                 port->im_port->shost->host_no,
469                 fcid_str, wwpn_str);
470
471         /* ITNIM processing */
472         if (itnim_drv->queue_work)
473                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
474 }
475
476 /*
477  * BFA FCS itnim online callback.
478  * Context: Interrupt. bfad_lock is held
479  */
480 void
481 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
482 {
483         struct bfad_port_s    *port;
484         struct bfad_im_s        *im = itnim_drv->im;
485
486         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
487         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
488         itnim_drv->state = ITNIM_STATE_ONLINE;
489         itnim_drv->queue_work = 1;
490         itnim_drv->im_port = port->im_port;
491
492         /* ITNIM processing */
493         if (itnim_drv->queue_work)
494                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
495 }
496
497 /*
498  * BFA FCS itnim offline callback.
499  * Context: Interrupt. bfad_lock is held
500  */
501 void
502 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
503 {
504         struct bfad_port_s    *port;
505         struct bfad_s *bfad;
506         struct bfad_im_s        *im = itnim_drv->im;
507
508         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
509         bfad = port->bfad;
510         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
511                  (port->flags & BFAD_PORT_DELETE)) {
512                 itnim_drv->state = ITNIM_STATE_OFFLINE;
513                 return;
514         }
515         itnim_drv->im_port = port->im_port;
516         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
517         itnim_drv->queue_work = 1;
518
519         /* ITNIM processing */
520         if (itnim_drv->queue_work)
521                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
522 }
523
524 /*
525  * Allocate a Scsi_Host for a port.
526  */
527 int
528 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
529                         struct device *dev)
530 {
531         int error = 1;
532
533         mutex_lock(&bfad_mutex);
534         if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
535                 mutex_unlock(&bfad_mutex);
536                 printk(KERN_WARNING "idr_pre_get failure\n");
537                 goto out;
538         }
539
540         error = idr_get_new(&bfad_im_port_index, im_port,
541                                          &im_port->idr_id);
542         if (error) {
543                 mutex_unlock(&bfad_mutex);
544                 printk(KERN_WARNING "idr_get_new failure\n");
545                 goto out;
546         }
547
548         mutex_unlock(&bfad_mutex);
549
550         im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
551         if (!im_port->shost) {
552                 error = 1;
553                 goto out_free_idr;
554         }
555
556         im_port->shost->hostdata[0] = (unsigned long)im_port;
557         im_port->shost->unique_id = im_port->idr_id;
558         im_port->shost->this_id = -1;
559         im_port->shost->max_id = MAX_FCP_TARGET;
560         im_port->shost->max_lun = MAX_FCP_LUN;
561         im_port->shost->max_cmd_len = 16;
562         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
563         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
564                 im_port->shost->transportt = bfad_im_scsi_transport_template;
565         else
566                 im_port->shost->transportt =
567                                 bfad_im_scsi_vport_transport_template;
568
569         error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
570         if (error) {
571                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
572                 goto out_fc_rel;
573         }
574
575         /* setup host fixed attribute if the lk supports */
576         bfad_fc_host_init(im_port);
577
578         return 0;
579
580 out_fc_rel:
581         scsi_host_put(im_port->shost);
582         im_port->shost = NULL;
583 out_free_idr:
584         mutex_lock(&bfad_mutex);
585         idr_remove(&bfad_im_port_index, im_port->idr_id);
586         mutex_unlock(&bfad_mutex);
587 out:
588         return error;
589 }
590
591 void
592 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
593 {
594         bfa_trc(bfad, bfad->inst_no);
595         BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
596                         im_port->shost->host_no);
597
598         fc_remove_host(im_port->shost);
599
600         scsi_remove_host(im_port->shost);
601         scsi_host_put(im_port->shost);
602
603         mutex_lock(&bfad_mutex);
604         idr_remove(&bfad_im_port_index, im_port->idr_id);
605         mutex_unlock(&bfad_mutex);
606 }
607
608 static void
609 bfad_im_port_delete_handler(struct work_struct *work)
610 {
611         struct bfad_im_port_s *im_port =
612                 container_of(work, struct bfad_im_port_s, port_delete_work);
613
614         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
615                 im_port->flags |= BFAD_PORT_DELETE;
616                 fc_vport_terminate(im_port->fc_vport);
617         }
618 }
619
620 bfa_status_t
621 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
622 {
623         int             rc = BFA_STATUS_OK;
624         struct bfad_im_port_s *im_port;
625
626         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
627         if (im_port == NULL) {
628                 rc = BFA_STATUS_ENOMEM;
629                 goto ext;
630         }
631         port->im_port = im_port;
632         im_port->port = port;
633         im_port->bfad = bfad;
634
635         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
636         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
637         INIT_LIST_HEAD(&im_port->binding_list);
638
639 ext:
640         return rc;
641 }
642
643 void
644 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
645 {
646         struct bfad_im_port_s *im_port = port->im_port;
647
648         queue_work(bfad->im->drv_workq,
649                                 &im_port->port_delete_work);
650 }
651
652 void
653 bfad_im_port_clean(struct bfad_im_port_s *im_port)
654 {
655         struct bfad_fcp_binding *bp, *bp_new;
656         unsigned long flags;
657         struct bfad_s *bfad =  im_port->bfad;
658
659         spin_lock_irqsave(&bfad->bfad_lock, flags);
660         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
661                                         list_entry) {
662                 list_del(&bp->list_entry);
663                 kfree(bp);
664         }
665
666         /* the itnim_mapped_list must be empty at this time */
667         WARN_ON(!list_empty(&im_port->itnim_mapped_list));
668
669         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
670 }
671
672 bfa_status_t
673 bfad_im_probe(struct bfad_s *bfad)
674 {
675         struct bfad_im_s      *im;
676         bfa_status_t    rc = BFA_STATUS_OK;
677
678         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
679         if (im == NULL) {
680                 rc = BFA_STATUS_ENOMEM;
681                 goto ext;
682         }
683
684         bfad->im = im;
685         im->bfad = bfad;
686
687         if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
688                 kfree(im);
689                 rc = BFA_STATUS_FAILED;
690         }
691
692 ext:
693         return rc;
694 }
695
696 void
697 bfad_im_probe_undo(struct bfad_s *bfad)
698 {
699         if (bfad->im) {
700                 bfad_destroy_workq(bfad->im);
701                 kfree(bfad->im);
702                 bfad->im = NULL;
703         }
704 }
705
706 struct Scsi_Host *
707 bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
708 {
709         struct scsi_host_template *sht;
710
711         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
712                 sht = &bfad_im_scsi_host_template;
713         else
714                 sht = &bfad_im_vport_template;
715
716         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
717
718         return scsi_host_alloc(sht, sizeof(unsigned long));
719 }
720
721 void
722 bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
723 {
724         if (!(im_port->flags & BFAD_PORT_DELETE))
725                 flush_workqueue(bfad->im->drv_workq);
726         bfad_im_scsi_host_free(im_port->bfad, im_port);
727         bfad_im_port_clean(im_port);
728         kfree(im_port);
729 }
730
731 void
732 bfad_destroy_workq(struct bfad_im_s *im)
733 {
734         if (im && im->drv_workq) {
735                 flush_workqueue(im->drv_workq);
736                 destroy_workqueue(im->drv_workq);
737                 im->drv_workq = NULL;
738         }
739 }
740
741 bfa_status_t
742 bfad_thread_workq(struct bfad_s *bfad)
743 {
744         struct bfad_im_s      *im = bfad->im;
745
746         bfa_trc(bfad, 0);
747         snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
748                  bfad->inst_no);
749         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
750         if (!im->drv_workq)
751                 return BFA_STATUS_FAILED;
752
753         return BFA_STATUS_OK;
754 }
755
756 /*
757  * Scsi_Host template entry.
758  *
759  * Description:
760  * OS entry point to adjust the queue_depths on a per-device basis.
761  * Called once per device during the bus scan.
762  * Return non-zero if fails.
763  */
764 static int
765 bfad_im_slave_configure(struct scsi_device *sdev)
766 {
767         if (sdev->tagged_supported)
768                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
769         else
770                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
771
772         return 0;
773 }
774
775 struct scsi_host_template bfad_im_scsi_host_template = {
776         .module = THIS_MODULE,
777         .name = BFAD_DRIVER_NAME,
778         .info = bfad_im_info,
779         .queuecommand = bfad_im_queuecommand,
780         .eh_abort_handler = bfad_im_abort_handler,
781         .eh_device_reset_handler = bfad_im_reset_lun_handler,
782         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
783
784         .slave_alloc = bfad_im_slave_alloc,
785         .slave_configure = bfad_im_slave_configure,
786         .slave_destroy = bfad_im_slave_destroy,
787
788         .this_id = -1,
789         .sg_tablesize = BFAD_IO_MAX_SGE,
790         .cmd_per_lun = 3,
791         .use_clustering = ENABLE_CLUSTERING,
792         .shost_attrs = bfad_im_host_attrs,
793         .max_sectors = 0xFFFF,
794 };
795
796 struct scsi_host_template bfad_im_vport_template = {
797         .module = THIS_MODULE,
798         .name = BFAD_DRIVER_NAME,
799         .info = bfad_im_info,
800         .queuecommand = bfad_im_queuecommand,
801         .eh_abort_handler = bfad_im_abort_handler,
802         .eh_device_reset_handler = bfad_im_reset_lun_handler,
803         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
804
805         .slave_alloc = bfad_im_slave_alloc,
806         .slave_configure = bfad_im_slave_configure,
807         .slave_destroy = bfad_im_slave_destroy,
808
809         .this_id = -1,
810         .sg_tablesize = BFAD_IO_MAX_SGE,
811         .cmd_per_lun = 3,
812         .use_clustering = ENABLE_CLUSTERING,
813         .shost_attrs = bfad_im_vport_attrs,
814         .max_sectors = 0xFFFF,
815 };
816
817 bfa_status_t
818 bfad_im_module_init(void)
819 {
820         bfad_im_scsi_transport_template =
821                 fc_attach_transport(&bfad_im_fc_function_template);
822         if (!bfad_im_scsi_transport_template)
823                 return BFA_STATUS_ENOMEM;
824
825         bfad_im_scsi_vport_transport_template =
826                 fc_attach_transport(&bfad_im_vport_fc_function_template);
827         if (!bfad_im_scsi_vport_transport_template) {
828                 fc_release_transport(bfad_im_scsi_transport_template);
829                 return BFA_STATUS_ENOMEM;
830         }
831
832         return BFA_STATUS_OK;
833 }
834
835 void
836 bfad_im_module_exit(void)
837 {
838         if (bfad_im_scsi_transport_template)
839                 fc_release_transport(bfad_im_scsi_transport_template);
840
841         if (bfad_im_scsi_vport_transport_template)
842                 fc_release_transport(bfad_im_scsi_vport_transport_template);
843 }
844
845 void
846 bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
847 {
848         struct scsi_device *tmp_sdev;
849
850         if (((jiffies - itnim->last_ramp_up_time) >
851                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
852                 ((jiffies - itnim->last_queue_full_time) >
853                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
854                 shost_for_each_device(tmp_sdev, sdev->host) {
855                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
856                                 if (tmp_sdev->id != sdev->id)
857                                         continue;
858                                 if (tmp_sdev->ordered_tags)
859                                         scsi_adjust_queue_depth(tmp_sdev,
860                                                 MSG_ORDERED_TAG,
861                                                 tmp_sdev->queue_depth + 1);
862                                 else
863                                         scsi_adjust_queue_depth(tmp_sdev,
864                                                 MSG_SIMPLE_TAG,
865                                                 tmp_sdev->queue_depth + 1);
866
867                                 itnim->last_ramp_up_time = jiffies;
868                         }
869                 }
870         }
871 }
872
873 void
874 bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
875 {
876         struct scsi_device *tmp_sdev;
877
878         itnim->last_queue_full_time = jiffies;
879
880         shost_for_each_device(tmp_sdev, sdev->host) {
881                 if (tmp_sdev->id != sdev->id)
882                         continue;
883                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
884         }
885 }
886
887 struct bfad_itnim_s *
888 bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
889 {
890         struct bfad_itnim_s   *itnim = NULL;
891
892         /* Search the mapped list for this target ID */
893         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
894                 if (id == itnim->scsi_tgt_id)
895                         return itnim;
896         }
897
898         return NULL;
899 }
900
901 /*
902  * Scsi_Host template entry slave_alloc
903  */
904 static int
905 bfad_im_slave_alloc(struct scsi_device *sdev)
906 {
907         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
908
909         if (!rport || fc_remote_port_chkready(rport))
910                 return -ENXIO;
911
912         sdev->hostdata = rport->dd_data;
913
914         return 0;
915 }
916
917 static u32
918 bfad_im_supported_speeds(struct bfa_s *bfa)
919 {
920         struct bfa_ioc_attr_s *ioc_attr;
921         u32 supported_speed = 0;
922
923         ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
924         if (!ioc_attr)
925                 return 0;
926
927         bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
928         if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
929                 if (ioc_attr->adapter_attr.is_mezz) {
930                         supported_speed |= FC_PORTSPEED_8GBIT |
931                                 FC_PORTSPEED_4GBIT |
932                                 FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
933                 } else {
934                         supported_speed |= FC_PORTSPEED_8GBIT |
935                                 FC_PORTSPEED_4GBIT |
936                                 FC_PORTSPEED_2GBIT;
937                 }
938         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
939                 supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
940                                 FC_PORTSPEED_1GBIT;
941         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
942                 supported_speed |= FC_PORTSPEED_10GBIT;
943         }
944         kfree(ioc_attr);
945         return supported_speed;
946 }
947
948 void
949 bfad_fc_host_init(struct bfad_im_port_s *im_port)
950 {
951         struct Scsi_Host *host = im_port->shost;
952         struct bfad_s         *bfad = im_port->bfad;
953         struct bfad_port_s    *port = im_port->port;
954         char symname[BFA_SYMNAME_MAXLEN];
955         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
956
957         fc_host_node_name(host) =
958                 cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
959         fc_host_port_name(host) =
960                 cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
961         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
962
963         fc_host_supported_classes(host) = FC_COS_CLASS3;
964
965         memset(fc_host_supported_fc4s(host), 0,
966                sizeof(fc_host_supported_fc4s(host)));
967         if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
968                 /* For FCP type 0x08 */
969                 fc_host_supported_fc4s(host)[2] = 1;
970         /* For fibre channel services type 0x20 */
971         fc_host_supported_fc4s(host)[7] = 1;
972
973         strncpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
974                 BFA_SYMNAME_MAXLEN);
975         sprintf(fc_host_symbolic_name(host), "%s", symname);
976
977         fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
978         fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
979 }
980
981 static void
982 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
983 {
984         struct fc_rport_identifiers rport_ids;
985         struct fc_rport *fc_rport;
986         struct bfad_itnim_data_s *itnim_data;
987
988         rport_ids.node_name =
989                 cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
990         rport_ids.port_name =
991                 cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
992         rport_ids.port_id =
993                 bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
994         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
995
996         itnim->fc_rport = fc_rport =
997                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
998
999         if (!fc_rport)
1000                 return;
1001
1002         fc_rport->maxframe_size =
1003                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1004         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1005
1006         itnim_data = fc_rport->dd_data;
1007         itnim_data->itnim = itnim;
1008
1009         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1010
1011         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1012                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1013
1014         if ((fc_rport->scsi_target_id != -1)
1015             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1016                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1017
1018         return;
1019 }
1020
1021 /*
1022  * Work queue handler using FC transport service
1023 * Context: kernel
1024  */
1025 static void
1026 bfad_im_itnim_work_handler(struct work_struct *work)
1027 {
1028         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1029                                                         itnim_work);
1030         struct bfad_im_s      *im = itnim->im;
1031         struct bfad_s         *bfad = im->bfad;
1032         struct bfad_im_port_s *im_port;
1033         unsigned long   flags;
1034         struct fc_rport *fc_rport;
1035         wwn_t wwpn;
1036         u32 fcid;
1037         char wwpn_str[32], fcid_str[16];
1038
1039         spin_lock_irqsave(&bfad->bfad_lock, flags);
1040         im_port = itnim->im_port;
1041         bfa_trc(bfad, itnim->state);
1042         switch (itnim->state) {
1043         case ITNIM_STATE_ONLINE:
1044                 if (!itnim->fc_rport) {
1045                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1046                         bfad_im_fc_rport_add(im_port, itnim);
1047                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1048                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1049                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1050                         wwn2str(wwpn_str, wwpn);
1051                         fcid2str(fcid_str, fcid);
1052                         list_add_tail(&itnim->list_entry,
1053                                 &im_port->itnim_mapped_list);
1054                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1055                                 "ITNIM ONLINE Target: %d:0:%d "
1056                                 "FCID: %s WWPN: %s\n",
1057                                 im_port->shost->host_no,
1058                                 itnim->scsi_tgt_id,
1059                                 fcid_str, wwpn_str);
1060                 } else {
1061                         printk(KERN_WARNING
1062                                 "%s: itnim %llx is already in online state\n",
1063                                 __func__,
1064                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1065                 }
1066
1067                 break;
1068         case ITNIM_STATE_OFFLINE_PENDING:
1069                 itnim->state = ITNIM_STATE_OFFLINE;
1070                 if (itnim->fc_rport) {
1071                         fc_rport = itnim->fc_rport;
1072                         ((struct bfad_itnim_data_s *)
1073                                 fc_rport->dd_data)->itnim = NULL;
1074                         itnim->fc_rport = NULL;
1075                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1076                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1077                                 fc_rport->dev_loss_tmo =
1078                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1079                                 fc_remote_port_delete(fc_rport);
1080                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1081                         }
1082                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1083                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1084                         wwn2str(wwpn_str, wwpn);
1085                         fcid2str(fcid_str, fcid);
1086                         list_del(&itnim->list_entry);
1087                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1088                                 "ITNIM OFFLINE Target: %d:0:%d "
1089                                 "FCID: %s WWPN: %s\n",
1090                                 im_port->shost->host_no,
1091                                 itnim->scsi_tgt_id,
1092                                 fcid_str, wwpn_str);
1093                 }
1094                 break;
1095         case ITNIM_STATE_FREE:
1096                 if (itnim->fc_rport) {
1097                         fc_rport = itnim->fc_rport;
1098                         ((struct bfad_itnim_data_s *)
1099                                 fc_rport->dd_data)->itnim = NULL;
1100                         itnim->fc_rport = NULL;
1101                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1102                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1103                                 fc_rport->dev_loss_tmo =
1104                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1105                                 fc_remote_port_delete(fc_rport);
1106                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1107                         }
1108                         list_del(&itnim->list_entry);
1109                 }
1110
1111                 kfree(itnim);
1112                 break;
1113         default:
1114                 WARN_ON(1);
1115                 break;
1116         }
1117
1118         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1119 }
1120
1121 /*
1122  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1123  */
1124 static int
1125 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1126 {
1127         struct bfad_im_port_s *im_port =
1128                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1129         struct bfad_s         *bfad = im_port->bfad;
1130         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1131         struct bfad_itnim_s   *itnim;
1132         struct bfa_ioim_s *hal_io;
1133         unsigned long   flags;
1134         int             rc;
1135         int       sg_cnt = 0;
1136         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1137
1138         rc = fc_remote_port_chkready(rport);
1139         if (rc) {
1140                 cmnd->result = rc;
1141                 done(cmnd);
1142                 return 0;
1143         }
1144
1145         sg_cnt = scsi_dma_map(cmnd);
1146         if (sg_cnt < 0)
1147                 return SCSI_MLQUEUE_HOST_BUSY;
1148
1149         cmnd->scsi_done = done;
1150
1151         spin_lock_irqsave(&bfad->bfad_lock, flags);
1152         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1153                 printk(KERN_WARNING
1154                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1155                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1156                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1157                 goto out_fail_cmd;
1158         }
1159
1160
1161         itnim = itnim_data->itnim;
1162         if (!itnim) {
1163                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1164                 goto out_fail_cmd;
1165         }
1166
1167         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1168                                     itnim->bfa_itnim, sg_cnt);
1169         if (!hal_io) {
1170                 printk(KERN_WARNING "hal_io failure\n");
1171                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1172                 scsi_dma_unmap(cmnd);
1173                 return SCSI_MLQUEUE_HOST_BUSY;
1174         }
1175
1176         cmnd->host_scribble = (char *)hal_io;
1177         bfa_ioim_start(hal_io);
1178         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1179
1180         return 0;
1181
1182 out_fail_cmd:
1183         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1184         scsi_dma_unmap(cmnd);
1185         if (done)
1186                 done(cmnd);
1187
1188         return 0;
1189 }
1190
1191 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1192
1193 void
1194 bfad_rport_online_wait(struct bfad_s *bfad)
1195 {
1196         int i;
1197         int rport_delay = 10;
1198
1199         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1200                 && i < bfa_linkup_delay; i++) {
1201                 set_current_state(TASK_UNINTERRUPTIBLE);
1202                 schedule_timeout(HZ);
1203         }
1204
1205         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1206                 rport_delay = rport_delay < bfa_linkup_delay ?
1207                         rport_delay : bfa_linkup_delay;
1208                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1209                         && i < rport_delay; i++) {
1210                         set_current_state(TASK_UNINTERRUPTIBLE);
1211                         schedule_timeout(HZ);
1212                 }
1213
1214                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1215                         set_current_state(TASK_UNINTERRUPTIBLE);
1216                         schedule_timeout(rport_delay * HZ);
1217                 }
1218         }
1219 }
1220
1221 int
1222 bfad_get_linkup_delay(struct bfad_s *bfad)
1223 {
1224         u8              nwwns = 0;
1225         wwn_t           wwns[BFA_PREBOOT_BOOTLUN_MAX];
1226         int             linkup_delay;
1227
1228         /*
1229          * Querying for the boot target port wwns
1230          * -- read from boot information in flash.
1231          * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1232          * else => local boot machine set linkup_delay = 0
1233          */
1234
1235         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1236
1237         if (nwwns > 0)
1238                 /* If Boot over SAN set linkup_delay = 30sec */
1239                 linkup_delay = 30;
1240         else
1241                 /* If local boot; no linkup_delay */
1242                 linkup_delay = 0;
1243
1244         return linkup_delay;
1245 }