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[SCSI] bfa: Brocade BFA FC SCSI driver
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / bfa / bfad_im.c
1 /*
2 * Copyright (c) 2005-2009 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 "bfad_trcmod.h"
25 #include "bfa_cb_ioim_macros.h"
26 #include <fcb/bfa_fcb_fcpim.h>
27
28 BFA_TRC_FILE(LDRV, IM);
29
30 DEFINE_IDR(bfad_im_port_index);
31 struct scsi_transport_template *bfad_im_scsi_transport_template;
32 static void bfad_im_itnim_work_handler(struct work_struct *work);
33 static int bfad_im_queuecommand(struct scsi_cmnd *cmnd,
34 void (*done)(struct scsi_cmnd *));
35 static int bfad_im_slave_alloc(struct scsi_device *sdev);
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
47 switch (io_status) {
48 case BFI_IOIM_STS_OK:
49 bfa_trc(bfad, scsi_status);
50 cmnd->result = ScsiResult(DID_OK, 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 if (residue > 0)
60 scsi_set_resid(cmnd, residue);
61 break;
62
63 case BFI_IOIM_STS_ABORTED:
64 case BFI_IOIM_STS_TIMEDOUT:
65 case BFI_IOIM_STS_PATHTOV:
66 default:
67 cmnd->result = ScsiResult(DID_ERROR, 0);
68 }
69
70 /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
71 if (cmnd->device->host != NULL)
72 scsi_dma_unmap(cmnd);
73
74 cmnd->host_scribble = NULL;
75 bfa_trc(bfad, cmnd->result);
76
77 itnim_data = cmnd->device->hostdata;
78 if (itnim_data) {
79 itnim = itnim_data->itnim;
80 if (!cmnd->result && itnim &&
81 (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
82 /* Queue depth adjustment for good status completion */
83 bfad_os_ramp_up_qdepth(itnim, cmnd->device);
84 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
85 /* qfull handling */
86 bfad_os_handle_qfull(itnim, cmnd->device);
87 }
88 }
89
90 cmnd->scsi_done(cmnd);
91 }
92
93 void
94 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
95 {
96 struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
97 struct bfad_itnim_data_s *itnim_data;
98 struct bfad_itnim_s *itnim;
99
100 cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
101
102 /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
103 if (cmnd->device->host != NULL)
104 scsi_dma_unmap(cmnd);
105
106 cmnd->host_scribble = NULL;
107
108 /* Queue depth adjustment */
109 if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
110 itnim_data = cmnd->device->hostdata;
111 if (itnim_data) {
112 itnim = itnim_data->itnim;
113 if (itnim)
114 bfad_os_ramp_up_qdepth(itnim, cmnd->device);
115 }
116 }
117
118 cmnd->scsi_done(cmnd);
119 }
120
121 void
122 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
123 {
124 struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
125 struct bfad_s *bfad = drv;
126
127 cmnd->result = ScsiResult(DID_ERROR, 0);
128
129 /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
130 if (cmnd->device->host != NULL)
131 scsi_dma_unmap(cmnd);
132
133 bfa_trc(bfad, cmnd->result);
134 cmnd->host_scribble = NULL;
135 }
136
137 void
138 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
139 enum bfi_tskim_status tsk_status)
140 {
141 struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
142 wait_queue_head_t *wq;
143
144 cmnd->SCp.Status |= tsk_status << 1;
145 set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
146 wq = (wait_queue_head_t *) cmnd->SCp.ptr;
147 cmnd->SCp.ptr = NULL;
148
149 if (wq)
150 wake_up(wq);
151 }
152
153 void
154 bfa_cb_ioim_resfree(void *drv)
155 {
156 }
157
158 /**
159 * Scsi_Host_template SCSI host template
160 */
161 /**
162 * Scsi_Host template entry, returns BFAD PCI info.
163 */
164 static const char *
165 bfad_im_info(struct Scsi_Host *shost)
166 {
167 static char bfa_buf[256];
168 struct bfad_im_port_s *im_port =
169 (struct bfad_im_port_s *) shost->hostdata[0];
170 struct bfa_ioc_attr_s ioc_attr;
171 struct bfad_s *bfad = im_port->bfad;
172
173 memset(&ioc_attr, 0, sizeof(ioc_attr));
174 bfa_get_attr(&bfad->bfa, &ioc_attr);
175
176 memset(bfa_buf, 0, sizeof(bfa_buf));
177 snprintf(bfa_buf, sizeof(bfa_buf),
178 "Brocade FC/FCOE Adapter, " "model: %s hwpath: %s driver: %s",
179 ioc_attr.adapter_attr.model, bfad->pci_name,
180 BFAD_DRIVER_VERSION);
181 return bfa_buf;
182 }
183
184 /**
185 * Scsi_Host template entry, aborts the specified SCSI command.
186 *
187 * Returns: SUCCESS or FAILED.
188 */
189 static int
190 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
191 {
192 struct Scsi_Host *shost = cmnd->device->host;
193 struct bfad_im_port_s *im_port =
194 (struct bfad_im_port_s *) shost->hostdata[0];
195 struct bfad_s *bfad = im_port->bfad;
196 struct bfa_ioim_s *hal_io;
197 unsigned long flags;
198 u32 timeout;
199 int rc = FAILED;
200
201 spin_lock_irqsave(&bfad->bfad_lock, flags);
202 hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
203 if (!hal_io) {
204 /* IO has been completed, retrun success */
205 rc = SUCCESS;
206 goto out;
207 }
208 if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
209 rc = FAILED;
210 goto out;
211 }
212
213 bfa_trc(bfad, hal_io->iotag);
214 bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT,
215 im_port->shost->host_no, cmnd, hal_io->iotag);
216 bfa_ioim_abort(hal_io);
217 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
218
219 /* Need to wait until the command get aborted */
220 timeout = 10;
221 while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
222 set_current_state(TASK_UNINTERRUPTIBLE);
223 schedule_timeout(timeout);
224 if (timeout < 4 * HZ)
225 timeout *= 2;
226 }
227
228 cmnd->scsi_done(cmnd);
229 bfa_trc(bfad, hal_io->iotag);
230 bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT_COMP,
231 im_port->shost->host_no, cmnd, hal_io->iotag);
232 return SUCCESS;
233 out:
234 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
235 return rc;
236 }
237
238 static bfa_status_t
239 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
240 struct bfad_itnim_s *itnim)
241 {
242 struct bfa_tskim_s *tskim;
243 struct bfa_itnim_s *bfa_itnim;
244 bfa_status_t rc = BFA_STATUS_OK;
245
246 bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
247 tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
248 if (!tskim) {
249 BFA_DEV_PRINTF(bfad, BFA_ERR,
250 "target reset, fail to allocate tskim\n");
251 rc = BFA_STATUS_FAILED;
252 goto out;
253 }
254
255 /*
256 * Set host_scribble to NULL to avoid aborting a task command if
257 * happens.
258 */
259 cmnd->host_scribble = NULL;
260 cmnd->SCp.Status = 0;
261 bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
262 bfa_tskim_start(tskim, bfa_itnim, (lun_t)0,
263 FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
264 out:
265 return rc;
266 }
267
268 /**
269 * Scsi_Host template entry, resets a LUN and abort its all commands.
270 *
271 * Returns: SUCCESS or FAILED.
272 *
273 */
274 static int
275 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
276 {
277 struct Scsi_Host *shost = cmnd->device->host;
278 struct bfad_im_port_s *im_port =
279 (struct bfad_im_port_s *) shost->hostdata[0];
280 struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
281 struct bfad_s *bfad = im_port->bfad;
282 struct bfa_tskim_s *tskim;
283 struct bfad_itnim_s *itnim;
284 struct bfa_itnim_s *bfa_itnim;
285 DECLARE_WAIT_QUEUE_HEAD(wq);
286 int rc = SUCCESS;
287 unsigned long flags;
288 enum bfi_tskim_status task_status;
289
290 spin_lock_irqsave(&bfad->bfad_lock, flags);
291 itnim = itnim_data->itnim;
292 if (!itnim) {
293 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
294 rc = FAILED;
295 goto out;
296 }
297
298 tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
299 if (!tskim) {
300 BFA_DEV_PRINTF(bfad, BFA_ERR,
301 "LUN reset, fail to allocate tskim");
302 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
303 rc = FAILED;
304 goto out;
305 }
306
307 /**
308 * Set host_scribble to NULL to avoid aborting a task command
309 * if happens.
310 */
311 cmnd->host_scribble = NULL;
312 cmnd->SCp.ptr = (char *)&wq;
313 cmnd->SCp.Status = 0;
314 bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
315 bfa_tskim_start(tskim, bfa_itnim,
316 bfad_int_to_lun(cmnd->device->lun),
317 FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
318 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
319
320 wait_event(wq, test_bit(IO_DONE_BIT,
321 (unsigned long *)&cmnd->SCp.Status));
322
323 task_status = cmnd->SCp.Status >> 1;
324 if (task_status != BFI_TSKIM_STS_OK) {
325 BFA_DEV_PRINTF(bfad, BFA_ERR, "LUN reset failure, status: %d\n",
326 task_status);
327 rc = FAILED;
328 }
329
330 out:
331 return rc;
332 }
333
334 /**
335 * Scsi_Host template entry, resets the bus and abort all commands.
336 */
337 static int
338 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
339 {
340 struct Scsi_Host *shost = cmnd->device->host;
341 struct bfad_im_port_s *im_port =
342 (struct bfad_im_port_s *) shost->hostdata[0];
343 struct bfad_s *bfad = im_port->bfad;
344 struct bfad_itnim_s *itnim;
345 unsigned long flags;
346 u32 i, rc, err_cnt = 0;
347 DECLARE_WAIT_QUEUE_HEAD(wq);
348 enum bfi_tskim_status task_status;
349
350 spin_lock_irqsave(&bfad->bfad_lock, flags);
351 for (i = 0; i < MAX_FCP_TARGET; i++) {
352 itnim = bfad_os_get_itnim(im_port, i);
353 if (itnim) {
354 cmnd->SCp.ptr = (char *)&wq;
355 rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
356 if (rc != BFA_STATUS_OK) {
357 err_cnt++;
358 continue;
359 }
360
361 /* wait target reset to complete */
362 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
363 wait_event(wq, test_bit(IO_DONE_BIT,
364 (unsigned long *)&cmnd->SCp.Status));
365 spin_lock_irqsave(&bfad->bfad_lock, flags);
366
367 task_status = cmnd->SCp.Status >> 1;
368 if (task_status != BFI_TSKIM_STS_OK) {
369 BFA_DEV_PRINTF(bfad, BFA_ERR,
370 "target reset failure,"
371 " status: %d\n", task_status);
372 err_cnt++;
373 }
374 }
375 }
376 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
377
378 if (err_cnt)
379 return FAILED;
380
381 return SUCCESS;
382 }
383
384 /**
385 * Scsi_Host template entry slave_destroy.
386 */
387 static void
388 bfad_im_slave_destroy(struct scsi_device *sdev)
389 {
390 sdev->hostdata = NULL;
391 return;
392 }
393
394 /**
395 * BFA FCS itnim callbacks
396 */
397
398 /**
399 * BFA FCS itnim alloc callback, after successful PRLI
400 * Context: Interrupt
401 */
402 void
403 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
404 struct bfad_itnim_s **itnim_drv)
405 {
406 *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
407 if (*itnim_drv == NULL)
408 return;
409
410 (*itnim_drv)->im = bfad->im;
411 *itnim = &(*itnim_drv)->fcs_itnim;
412 (*itnim_drv)->state = ITNIM_STATE_NONE;
413
414 /*
415 * Initiaze the itnim_work
416 */
417 INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
418 bfad->bfad_flags |= BFAD_RPORT_ONLINE;
419 }
420
421 /**
422 * BFA FCS itnim free callback.
423 * Context: Interrupt. bfad_lock is held
424 */
425 void
426 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
427 {
428 struct bfad_port_s *port;
429 wwn_t wwpn;
430 u32 fcid;
431 char wwpn_str[32], fcid_str[16];
432
433 /* online to free state transtion should not happen */
434 bfa_assert(itnim_drv->state != ITNIM_STATE_ONLINE);
435
436 itnim_drv->queue_work = 1;
437 /* offline request is not yet done, use the same request to free */
438 if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
439 itnim_drv->queue_work = 0;
440
441 itnim_drv->state = ITNIM_STATE_FREE;
442 port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
443 itnim_drv->im_port = port->im_port;
444 wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
445 fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
446 wwn2str(wwpn_str, wwpn);
447 fcid2str(fcid_str, fcid);
448 bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_FREE,
449 port->im_port->shost->host_no,
450 fcid_str, wwpn_str);
451 bfad_os_itnim_process(itnim_drv);
452 }
453
454 /**
455 * BFA FCS itnim online callback.
456 * Context: Interrupt. bfad_lock is held
457 */
458 void
459 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
460 {
461 struct bfad_port_s *port;
462
463 itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
464 port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
465 itnim_drv->state = ITNIM_STATE_ONLINE;
466 itnim_drv->queue_work = 1;
467 itnim_drv->im_port = port->im_port;
468 bfad_os_itnim_process(itnim_drv);
469 }
470
471 /**
472 * BFA FCS itnim offline callback.
473 * Context: Interrupt. bfad_lock is held
474 */
475 void
476 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
477 {
478 struct bfad_port_s *port;
479 struct bfad_s *bfad;
480
481 port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
482 bfad = port->bfad;
483 if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
484 (port->flags & BFAD_PORT_DELETE)) {
485 itnim_drv->state = ITNIM_STATE_OFFLINE;
486 return;
487 }
488 itnim_drv->im_port = port->im_port;
489 itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
490 itnim_drv->queue_work = 1;
491 bfad_os_itnim_process(itnim_drv);
492 }
493
494 /**
495 * BFA FCS itnim timeout callback.
496 * Context: Interrupt. bfad_lock is held
497 */
498 void bfa_fcb_itnim_tov(struct bfad_itnim_s *itnim)
499 {
500 itnim->state = ITNIM_STATE_TIMEOUT;
501 }
502
503 /**
504 * Path TOV processing begin notification -- dummy for linux
505 */
506 void
507 bfa_fcb_itnim_tov_begin(struct bfad_itnim_s *itnim)
508 {
509 }
510
511
512
513 /**
514 * Allocate a Scsi_Host for a port.
515 */
516 int
517 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
518 {
519 int error = 1;
520
521 if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
522 printk(KERN_WARNING "idr_pre_get failure\n");
523 goto out;
524 }
525
526 error = idr_get_new(&bfad_im_port_index, im_port,
527 &im_port->idr_id);
528 if (error) {
529 printk(KERN_WARNING "idr_get_new failure\n");
530 goto out;
531 }
532
533 im_port->shost = bfad_os_scsi_host_alloc(im_port, bfad);
534 if (!im_port->shost) {
535 error = 1;
536 goto out_free_idr;
537 }
538
539 im_port->shost->hostdata[0] = (unsigned long)im_port;
540 im_port->shost->unique_id = im_port->idr_id;
541 im_port->shost->this_id = -1;
542 im_port->shost->max_id = MAX_FCP_TARGET;
543 im_port->shost->max_lun = MAX_FCP_LUN;
544 im_port->shost->max_cmd_len = 16;
545 im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
546 im_port->shost->transportt = bfad_im_scsi_transport_template;
547
548 error = bfad_os_scsi_add_host(im_port->shost, im_port, bfad);
549 if (error) {
550 printk(KERN_WARNING "bfad_os_scsi_add_host failure %d\n",
551 error);
552 goto out_fc_rel;
553 }
554
555 /* setup host fixed attribute if the lk supports */
556 bfad_os_fc_host_init(im_port);
557
558 return 0;
559
560 out_fc_rel:
561 scsi_host_put(im_port->shost);
562 out_free_idr:
563 idr_remove(&bfad_im_port_index, im_port->idr_id);
564 out:
565 return error;
566 }
567
568 void
569 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
570 {
571 unsigned long flags;
572
573 bfa_trc(bfad, bfad->inst_no);
574 bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_HOST_FREE,
575 im_port->shost->host_no);
576
577 fc_remove_host(im_port->shost);
578
579 scsi_remove_host(im_port->shost);
580 scsi_host_put(im_port->shost);
581
582 spin_lock_irqsave(&bfad->bfad_lock, flags);
583 idr_remove(&bfad_im_port_index, im_port->idr_id);
584 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
585 }
586
587 static void
588 bfad_im_port_delete_handler(struct work_struct *work)
589 {
590 struct bfad_im_port_s *im_port =
591 container_of(work, struct bfad_im_port_s, port_delete_work);
592
593 bfad_im_scsi_host_free(im_port->bfad, im_port);
594 bfad_im_port_clean(im_port);
595 kfree(im_port);
596 }
597
598 bfa_status_t
599 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
600 {
601 int rc = BFA_STATUS_OK;
602 struct bfad_im_port_s *im_port;
603
604 im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
605 if (im_port == NULL) {
606 rc = BFA_STATUS_ENOMEM;
607 goto ext;
608 }
609 port->im_port = im_port;
610 im_port->port = port;
611 im_port->bfad = bfad;
612
613 INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
614 INIT_LIST_HEAD(&im_port->itnim_mapped_list);
615 INIT_LIST_HEAD(&im_port->binding_list);
616
617 ext:
618 return rc;
619 }
620
621 void
622 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
623 {
624 struct bfad_im_port_s *im_port = port->im_port;
625
626 queue_work(bfad->im->drv_workq,
627 &im_port->port_delete_work);
628 }
629
630 void
631 bfad_im_port_clean(struct bfad_im_port_s *im_port)
632 {
633 struct bfad_fcp_binding *bp, *bp_new;
634 unsigned long flags;
635 struct bfad_s *bfad = im_port->bfad;
636
637 spin_lock_irqsave(&bfad->bfad_lock, flags);
638 list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
639 list_entry) {
640 list_del(&bp->list_entry);
641 kfree(bp);
642 }
643
644 /* the itnim_mapped_list must be empty at this time */
645 bfa_assert(list_empty(&im_port->itnim_mapped_list));
646
647 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
648 }
649
650 void
651 bfad_im_port_online(struct bfad_s *bfad, struct bfad_port_s *port)
652 {
653 }
654
655 void
656 bfad_im_port_offline(struct bfad_s *bfad, struct bfad_port_s *port)
657 {
658 }
659
660 bfa_status_t
661 bfad_im_probe(struct bfad_s *bfad)
662 {
663 struct bfad_im_s *im;
664 bfa_status_t rc = BFA_STATUS_OK;
665
666 im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
667 if (im == NULL) {
668 rc = BFA_STATUS_ENOMEM;
669 goto ext;
670 }
671
672 bfad->im = im;
673 im->bfad = bfad;
674
675 if (bfad_os_thread_workq(bfad) != BFA_STATUS_OK) {
676 kfree(im);
677 rc = BFA_STATUS_FAILED;
678 }
679
680 ext:
681 return rc;
682 }
683
684 void
685 bfad_im_probe_undo(struct bfad_s *bfad)
686 {
687 if (bfad->im) {
688 bfad_os_destroy_workq(bfad->im);
689 kfree(bfad->im);
690 bfad->im = NULL;
691 }
692 }
693
694
695
696
697 int
698 bfad_os_scsi_add_host(struct Scsi_Host *shost, struct bfad_im_port_s *im_port,
699 struct bfad_s *bfad)
700 {
701 struct device *dev;
702
703 if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
704 dev = &bfad->pcidev->dev;
705 else
706 dev = &bfad->pport.im_port->shost->shost_gendev;
707
708 return scsi_add_host(shost, dev);
709 }
710
711 struct Scsi_Host *
712 bfad_os_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
713 {
714 struct scsi_host_template *sht;
715
716 if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
717 sht = &bfad_im_scsi_host_template;
718 else
719 sht = &bfad_im_vport_template;
720
721 sht->sg_tablesize = bfad->cfg_data.io_max_sge;
722
723 return scsi_host_alloc(sht, sizeof(unsigned long));
724 }
725
726 void
727 bfad_os_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
728 {
729 flush_workqueue(bfad->im->drv_workq);
730 bfad_im_scsi_host_free(im_port->bfad, im_port);
731 bfad_im_port_clean(im_port);
732 kfree(im_port);
733 }
734
735 void
736 bfad_os_destroy_workq(struct bfad_im_s *im)
737 {
738 if (im && im->drv_workq) {
739 destroy_workqueue(im->drv_workq);
740 im->drv_workq = NULL;
741 }
742 }
743
744 bfa_status_t
745 bfad_os_thread_workq(struct bfad_s *bfad)
746 {
747 struct bfad_im_s *im = bfad->im;
748
749 bfa_trc(bfad, 0);
750 snprintf(im->drv_workq_name, BFAD_KOBJ_NAME_LEN, "bfad_wq_%d",
751 bfad->inst_no);
752 im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
753 if (!im->drv_workq)
754 return BFA_STATUS_FAILED;
755
756 return BFA_STATUS_OK;
757 }
758
759 /**
760 * Scsi_Host template entry.
761 *
762 * Description:
763 * OS entry point to adjust the queue_depths on a per-device basis.
764 * Called once per device during the bus scan.
765 * Return non-zero if fails.
766 */
767 static int
768 bfad_im_slave_configure(struct scsi_device *sdev)
769 {
770 if (sdev->tagged_supported)
771 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
772 else
773 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
774
775 return 0;
776 }
777
778 struct scsi_host_template bfad_im_scsi_host_template = {
779 .module = THIS_MODULE,
780 .name = BFAD_DRIVER_NAME,
781 .info = bfad_im_info,
782 .queuecommand = bfad_im_queuecommand,
783 .eh_abort_handler = bfad_im_abort_handler,
784 .eh_device_reset_handler = bfad_im_reset_lun_handler,
785 .eh_bus_reset_handler = bfad_im_reset_bus_handler,
786
787 .slave_alloc = bfad_im_slave_alloc,
788 .slave_configure = bfad_im_slave_configure,
789 .slave_destroy = bfad_im_slave_destroy,
790
791 .this_id = -1,
792 .sg_tablesize = BFAD_IO_MAX_SGE,
793 .cmd_per_lun = 3,
794 .use_clustering = ENABLE_CLUSTERING,
795 .shost_attrs = bfad_im_host_attrs,
796 .max_sectors = 0xFFFF,
797 };
798
799 struct scsi_host_template bfad_im_vport_template = {
800 .module = THIS_MODULE,
801 .name = BFAD_DRIVER_NAME,
802 .info = bfad_im_info,
803 .queuecommand = bfad_im_queuecommand,
804 .eh_abort_handler = bfad_im_abort_handler,
805 .eh_device_reset_handler = bfad_im_reset_lun_handler,
806 .eh_bus_reset_handler = bfad_im_reset_bus_handler,
807
808 .slave_alloc = bfad_im_slave_alloc,
809 .slave_configure = bfad_im_slave_configure,
810 .slave_destroy = bfad_im_slave_destroy,
811
812 .this_id = -1,
813 .sg_tablesize = BFAD_IO_MAX_SGE,
814 .cmd_per_lun = 3,
815 .use_clustering = ENABLE_CLUSTERING,
816 .shost_attrs = bfad_im_vport_attrs,
817 .max_sectors = 0xFFFF,
818 };
819
820 void
821 bfad_im_probe_post(struct bfad_im_s *im)
822 {
823 flush_workqueue(im->drv_workq);
824 }
825
826 bfa_status_t
827 bfad_im_module_init(void)
828 {
829 bfad_im_scsi_transport_template =
830 fc_attach_transport(&bfad_im_fc_function_template);
831 if (!bfad_im_scsi_transport_template)
832 return BFA_STATUS_ENOMEM;
833
834 return BFA_STATUS_OK;
835 }
836
837 void
838 bfad_im_module_exit(void)
839 {
840 if (bfad_im_scsi_transport_template)
841 fc_release_transport(bfad_im_scsi_transport_template);
842 }
843
844 void
845 bfad_os_itnim_process(struct bfad_itnim_s *itnim_drv)
846 {
847 struct bfad_im_s *im = itnim_drv->im;
848
849 if (itnim_drv->queue_work)
850 queue_work(im->drv_workq, &itnim_drv->itnim_work);
851 }
852
853 void
854 bfad_os_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
855 {
856 struct scsi_device *tmp_sdev;
857
858 if (((jiffies - itnim->last_ramp_up_time) >
859 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
860 ((jiffies - itnim->last_queue_full_time) >
861 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
862 shost_for_each_device(tmp_sdev, sdev->host) {
863 if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
864 if (tmp_sdev->id != sdev->id)
865 continue;
866 if (tmp_sdev->ordered_tags)
867 scsi_adjust_queue_depth(tmp_sdev,
868 MSG_ORDERED_TAG,
869 tmp_sdev->queue_depth + 1);
870 else
871 scsi_adjust_queue_depth(tmp_sdev,
872 MSG_SIMPLE_TAG,
873 tmp_sdev->queue_depth + 1);
874
875 itnim->last_ramp_up_time = jiffies;
876 }
877 }
878 }
879 }
880
881 void
882 bfad_os_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
883 {
884 struct scsi_device *tmp_sdev;
885
886 itnim->last_queue_full_time = jiffies;
887
888 shost_for_each_device(tmp_sdev, sdev->host) {
889 if (tmp_sdev->id != sdev->id)
890 continue;
891 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
892 }
893 }
894
895
896
897
898 struct bfad_itnim_s *
899 bfad_os_get_itnim(struct bfad_im_port_s *im_port, int id)
900 {
901 struct bfad_itnim_s *itnim = NULL;
902
903 /* Search the mapped list for this target ID */
904 list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
905 if (id == itnim->scsi_tgt_id)
906 return itnim;
907 }
908
909 return NULL;
910 }
911
912 /**
913 * Scsi_Host template entry slave_alloc
914 */
915 static int
916 bfad_im_slave_alloc(struct scsi_device *sdev)
917 {
918 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
919
920 if (!rport || fc_remote_port_chkready(rport))
921 return -ENXIO;
922
923 sdev->hostdata = rport->dd_data;
924
925 return 0;
926 }
927
928 void
929 bfad_os_fc_host_init(struct bfad_im_port_s *im_port)
930 {
931 struct Scsi_Host *host = im_port->shost;
932 struct bfad_s *bfad = im_port->bfad;
933 struct bfad_port_s *port = im_port->port;
934 union attr {
935 struct bfa_pport_attr_s pattr;
936 struct bfa_ioc_attr_s ioc_attr;
937 } attr;
938
939 fc_host_node_name(host) =
940 bfa_os_htonll((bfa_fcs_port_get_nwwn(port->fcs_port)));
941 fc_host_port_name(host) =
942 bfa_os_htonll((bfa_fcs_port_get_pwwn(port->fcs_port)));
943
944 fc_host_supported_classes(host) = FC_COS_CLASS3;
945
946 memset(fc_host_supported_fc4s(host), 0,
947 sizeof(fc_host_supported_fc4s(host)));
948 if (bfad_supported_fc4s & (BFA_PORT_ROLE_FCP_IM | BFA_PORT_ROLE_FCP_TM))
949 /* For FCP type 0x08 */
950 fc_host_supported_fc4s(host)[2] = 1;
951 if (bfad_supported_fc4s | BFA_PORT_ROLE_FCP_IPFC)
952 /* For LLC/SNAP type 0x05 */
953 fc_host_supported_fc4s(host)[3] = 0x20;
954 /* For fibre channel services type 0x20 */
955 fc_host_supported_fc4s(host)[7] = 1;
956
957 memset(&attr.ioc_attr, 0, sizeof(attr.ioc_attr));
958 bfa_get_attr(&bfad->bfa, &attr.ioc_attr);
959 sprintf(fc_host_symbolic_name(host), "Brocade %s FV%s DV%s",
960 attr.ioc_attr.adapter_attr.model,
961 attr.ioc_attr.adapter_attr.fw_ver, BFAD_DRIVER_VERSION);
962
963 fc_host_supported_speeds(host) = 0;
964 fc_host_supported_speeds(host) |=
965 FC_PORTSPEED_8GBIT | FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
966 FC_PORTSPEED_1GBIT;
967
968 memset(&attr.pattr, 0, sizeof(attr.pattr));
969 bfa_pport_get_attr(&bfad->bfa, &attr.pattr);
970 fc_host_maxframe_size(host) = attr.pattr.pport_cfg.maxfrsize;
971 }
972
973 static void
974 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
975 {
976 struct fc_rport_identifiers rport_ids;
977 struct fc_rport *fc_rport;
978 struct bfad_itnim_data_s *itnim_data;
979
980 rport_ids.node_name =
981 bfa_os_htonll(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
982 rport_ids.port_name =
983 bfa_os_htonll(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
984 rport_ids.port_id =
985 bfa_os_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
986 rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
987
988 itnim->fc_rport = fc_rport =
989 fc_remote_port_add(im_port->shost, 0, &rport_ids);
990
991 if (!fc_rport)
992 return;
993
994 fc_rport->maxframe_size =
995 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
996 fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
997
998 itnim_data = fc_rport->dd_data;
999 itnim_data->itnim = itnim;
1000
1001 rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1002
1003 if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1004 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1005
1006 if ((fc_rport->scsi_target_id != -1)
1007 && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1008 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1009
1010 return;
1011 }
1012
1013 /**
1014 * Work queue handler using FC transport service
1015 * Context: kernel
1016 */
1017 static void
1018 bfad_im_itnim_work_handler(struct work_struct *work)
1019 {
1020 struct bfad_itnim_s *itnim = container_of(work, struct bfad_itnim_s,
1021 itnim_work);
1022 struct bfad_im_s *im = itnim->im;
1023 struct bfad_s *bfad = im->bfad;
1024 struct bfad_im_port_s *im_port;
1025 unsigned long flags;
1026 struct fc_rport *fc_rport;
1027 wwn_t wwpn;
1028 u32 fcid;
1029 char wwpn_str[32], fcid_str[16];
1030
1031 spin_lock_irqsave(&bfad->bfad_lock, flags);
1032 im_port = itnim->im_port;
1033 bfa_trc(bfad, itnim->state);
1034 switch (itnim->state) {
1035 case ITNIM_STATE_ONLINE:
1036 if (!itnim->fc_rport) {
1037 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1038 bfad_im_fc_rport_add(im_port, itnim);
1039 spin_lock_irqsave(&bfad->bfad_lock, flags);
1040 wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1041 fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1042 wwn2str(wwpn_str, wwpn);
1043 fcid2str(fcid_str, fcid);
1044 list_add_tail(&itnim->list_entry,
1045 &im_port->itnim_mapped_list);
1046 bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_ONLINE,
1047 im_port->shost->host_no,
1048 itnim->scsi_tgt_id,
1049 fcid_str, wwpn_str);
1050 } else {
1051 printk(KERN_WARNING
1052 "%s: itnim %llx is already in online state\n",
1053 __FUNCTION__,
1054 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1055 }
1056
1057 break;
1058 case ITNIM_STATE_OFFLINE_PENDING:
1059 itnim->state = ITNIM_STATE_OFFLINE;
1060 if (itnim->fc_rport) {
1061 fc_rport = itnim->fc_rport;
1062 ((struct bfad_itnim_data_s *)
1063 fc_rport->dd_data)->itnim = NULL;
1064 itnim->fc_rport = NULL;
1065 if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1066 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1067 fc_rport->dev_loss_tmo =
1068 bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1069 fc_remote_port_delete(fc_rport);
1070 spin_lock_irqsave(&bfad->bfad_lock, flags);
1071 }
1072 wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1073 fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1074 wwn2str(wwpn_str, wwpn);
1075 fcid2str(fcid_str, fcid);
1076 list_del(&itnim->list_entry);
1077 bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_OFFLINE,
1078 im_port->shost->host_no,
1079 itnim->scsi_tgt_id,
1080 fcid_str, wwpn_str);
1081 }
1082 break;
1083 case ITNIM_STATE_FREE:
1084 if (itnim->fc_rport) {
1085 fc_rport = itnim->fc_rport;
1086 ((struct bfad_itnim_data_s *)
1087 fc_rport->dd_data)->itnim = NULL;
1088 itnim->fc_rport = NULL;
1089 if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1090 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1091 fc_rport->dev_loss_tmo =
1092 bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1093 fc_remote_port_delete(fc_rport);
1094 spin_lock_irqsave(&bfad->bfad_lock, flags);
1095 }
1096 list_del(&itnim->list_entry);
1097 }
1098
1099 kfree(itnim);
1100 break;
1101 default:
1102 bfa_assert(0);
1103 break;
1104 }
1105
1106 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1107 }
1108
1109 /**
1110 * Scsi_Host template entry, queue a SCSI command to the BFAD.
1111 */
1112 static int
1113 bfad_im_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1114 {
1115 struct bfad_im_port_s *im_port =
1116 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1117 struct bfad_s *bfad = im_port->bfad;
1118 struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1119 struct bfad_itnim_s *itnim;
1120 struct bfa_ioim_s *hal_io;
1121 unsigned long flags;
1122 int rc;
1123 s16 sg_cnt = 0;
1124 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1125
1126 rc = fc_remote_port_chkready(rport);
1127 if (rc) {
1128 cmnd->result = rc;
1129 done(cmnd);
1130 return 0;
1131 }
1132
1133 sg_cnt = scsi_dma_map(cmnd);
1134
1135 if (sg_cnt < 0)
1136 return SCSI_MLQUEUE_HOST_BUSY;
1137
1138 cmnd->scsi_done = done;
1139
1140 spin_lock_irqsave(&bfad->bfad_lock, flags);
1141 if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1142 printk(KERN_WARNING
1143 "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1144 bfad->inst_no, cmnd, cmnd->cmnd[0]);
1145 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1146 goto out_fail_cmd;
1147 }
1148
1149 itnim = itnim_data->itnim;
1150 if (!itnim) {
1151 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1152 goto out_fail_cmd;
1153 }
1154
1155 hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1156 itnim->bfa_itnim, sg_cnt);
1157 if (!hal_io) {
1158 printk(KERN_WARNING "hal_io failure\n");
1159 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1160 scsi_dma_unmap(cmnd);
1161 return SCSI_MLQUEUE_HOST_BUSY;
1162 }
1163
1164 cmnd->host_scribble = (char *)hal_io;
1165 bfa_trc_fp(bfad, hal_io->iotag);
1166 bfa_ioim_start(hal_io);
1167 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1168
1169 return 0;
1170
1171 out_fail_cmd:
1172 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1173 scsi_dma_unmap(cmnd);
1174 if (done)
1175 done(cmnd);
1176
1177 return 0;
1178 }
1179
1180 void
1181 bfad_os_rport_online_wait(struct bfad_s *bfad)
1182 {
1183 int i;
1184 int rport_delay = 10;
1185
1186 for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1187 && i < bfa_linkup_delay; i++)
1188 schedule_timeout_uninterruptible(HZ);
1189
1190 if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1191 rport_delay = rport_delay < bfa_linkup_delay ?
1192 rport_delay : bfa_linkup_delay;
1193 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1194 && i < rport_delay; i++)
1195 schedule_timeout_uninterruptible(HZ);
1196
1197 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE))
1198 schedule_timeout_uninterruptible(rport_delay * HZ);
1199 }
1200 }
1201
1202 int
1203 bfad_os_get_linkup_delay(struct bfad_s *bfad)
1204 {
1205
1206 u8 nwwns = 0;
1207 wwn_t *wwns;
1208 int ldelay;
1209
1210 /*
1211 * Querying for the boot target port wwns
1212 * -- read from boot information in flash.
1213 * If nwwns > 0 => boot over SAN and set bfa_linkup_delay = 30
1214 * else => local boot machine set bfa_linkup_delay = 10
1215 */
1216
1217 bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, &wwns);
1218
1219 if (nwwns > 0) {
1220 /* If boot over SAN; linkup_delay = 30sec */
1221 ldelay = 30;
1222 } else {
1223 /* If local boot; linkup_delay = 10sec */
1224 ldelay = 0;
1225 }
1226
1227 return ldelay;
1228 }
1229
1230
kernel source for telekom puls (alcatel/mediatek)