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Blackfin: bf548-ezkit/bf561-ezkit: update nor flash layout
[zen-stable.git] / drivers / scsi / bfa / bfad_im.c
blobc2b36179e8e88e26c53e0783ce56b1ba406a4173
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 }