f263891b8cc61da896214efe4d83e4e13edeac2b
[linux-2.6.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 <linux/slab.h>
23 #include "bfad_drv.h"
24 #include "bfad_im.h"
25 #include "bfad_trcmod.h"
26 #include "bfa_cb_ioim_macros.h"
27 #include <fcb/bfa_fcb_fcpim.h>
28
29 BFA_TRC_FILE(LDRV, IM);
30
31 DEFINE_IDR(bfad_im_port_index);
32 struct scsi_transport_template *bfad_im_scsi_transport_template;
33 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
34 static void bfad_im_itnim_work_handler(struct work_struct *work);
35 static int bfad_im_queuecommand(struct scsi_cmnd *cmnd,
36                 void (*done)(struct scsi_cmnd *));
37 static int bfad_im_slave_alloc(struct scsi_device *sdev);
38
39 void
40 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
41                         enum bfi_ioim_status io_status, u8 scsi_status,
42                         int sns_len, u8 *sns_info, s32 residue)
43 {
44         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
45         struct bfad_s         *bfad = drv;
46         struct bfad_itnim_data_s *itnim_data;
47         struct bfad_itnim_s *itnim;
48         u8         host_status = DID_OK;
49
50         switch (io_status) {
51         case BFI_IOIM_STS_OK:
52                 bfa_trc(bfad, scsi_status);
53                 scsi_set_resid(cmnd, 0);
54
55                 if (sns_len > 0) {
56                         bfa_trc(bfad, sns_len);
57                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
58                                 sns_len = SCSI_SENSE_BUFFERSIZE;
59                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
60                 }
61                 if (residue > 0) {
62                         bfa_trc(bfad, residue);
63                         scsi_set_resid(cmnd, residue);
64                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
65                                 (scsi_bufflen(cmnd) - residue) <
66                                         cmnd->underflow) {
67                                 bfa_trc(bfad, 0);
68                                 host_status = DID_ERROR;
69                         }
70                 }
71                 cmnd->result = ScsiResult(host_status, scsi_status);
72
73                 break;
74
75         case BFI_IOIM_STS_ABORTED:
76         case BFI_IOIM_STS_TIMEDOUT:
77         case BFI_IOIM_STS_PATHTOV:
78         default:
79                 cmnd->result = ScsiResult(DID_ERROR, 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_os_ramp_up_qdepth(itnim, cmnd->device);
96                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
97                         /* qfull handling */
98                         bfad_os_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_os_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 void
166 bfa_cb_ioim_resfree(void *drv)
167 {
168 }
169
170 /**
171  *  Scsi_Host_template SCSI host template
172  */
173 /**
174  * Scsi_Host template entry, returns BFAD PCI info.
175  */
176 static const char *
177 bfad_im_info(struct Scsi_Host *shost)
178 {
179         static char     bfa_buf[256];
180         struct bfad_im_port_s *im_port =
181                         (struct bfad_im_port_s *) shost->hostdata[0];
182         struct bfad_s         *bfad = im_port->bfad;
183         char model[BFA_ADAPTER_MODEL_NAME_LEN];
184
185         bfa_get_adapter_model(&bfad->bfa, model);
186
187         memset(bfa_buf, 0, sizeof(bfa_buf));
188         snprintf(bfa_buf, sizeof(bfa_buf),
189                 "Brocade FC/FCOE Adapter, " "model: %s hwpath: %s driver: %s",
190                 model, bfad->pci_name, BFAD_DRIVER_VERSION);
191         return bfa_buf;
192 }
193
194 /**
195  * Scsi_Host template entry, aborts the specified SCSI command.
196  *
197  * Returns: SUCCESS or FAILED.
198  */
199 static int
200 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
201 {
202         struct Scsi_Host *shost = cmnd->device->host;
203         struct bfad_im_port_s *im_port =
204                         (struct bfad_im_port_s *) shost->hostdata[0];
205         struct bfad_s         *bfad = im_port->bfad;
206         struct bfa_ioim_s *hal_io;
207         unsigned long   flags;
208         u32        timeout;
209         int             rc = FAILED;
210
211         spin_lock_irqsave(&bfad->bfad_lock, flags);
212         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
213         if (!hal_io) {
214                 /* IO has been completed, retrun success */
215                 rc = SUCCESS;
216                 goto out;
217         }
218         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
219                 rc = FAILED;
220                 goto out;
221         }
222
223         bfa_trc(bfad, hal_io->iotag);
224         bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT,
225                 im_port->shost->host_no, cmnd, hal_io->iotag);
226         bfa_ioim_abort(hal_io);
227         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
228
229         /* Need to wait until the command get aborted */
230         timeout = 10;
231         while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
232                 set_current_state(TASK_UNINTERRUPTIBLE);
233                 schedule_timeout(timeout);
234                 if (timeout < 4 * HZ)
235                         timeout *= 2;
236         }
237
238         cmnd->scsi_done(cmnd);
239         bfa_trc(bfad, hal_io->iotag);
240         bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT_COMP,
241                 im_port->shost->host_no, cmnd, hal_io->iotag);
242         return SUCCESS;
243 out:
244         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
245         return rc;
246 }
247
248 static bfa_status_t
249 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
250                      struct bfad_itnim_s *itnim)
251 {
252         struct bfa_tskim_s *tskim;
253         struct bfa_itnim_s *bfa_itnim;
254         bfa_status_t    rc = BFA_STATUS_OK;
255
256         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
257         if (!tskim) {
258                 BFA_DEV_PRINTF(bfad, BFA_ERR,
259                                "target reset, fail to allocate tskim\n");
260                 rc = BFA_STATUS_FAILED;
261                 goto out;
262         }
263
264         /*
265          * Set host_scribble to NULL to avoid aborting a task command if
266          * happens.
267          */
268         cmnd->host_scribble = NULL;
269         cmnd->SCp.Status = 0;
270         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
271         bfa_tskim_start(tskim, bfa_itnim, (lun_t)0,
272                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
273 out:
274         return rc;
275 }
276
277 /**
278  * Scsi_Host template entry, resets a LUN and abort its all commands.
279  *
280  * Returns: SUCCESS or FAILED.
281  *
282  */
283 static int
284 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
285 {
286         struct Scsi_Host *shost = cmnd->device->host;
287         struct bfad_im_port_s *im_port =
288                         (struct bfad_im_port_s *) shost->hostdata[0];
289         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
290         struct bfad_s         *bfad = im_port->bfad;
291         struct bfa_tskim_s *tskim;
292         struct bfad_itnim_s   *itnim;
293         struct bfa_itnim_s *bfa_itnim;
294         DECLARE_WAIT_QUEUE_HEAD(wq);
295         int             rc = SUCCESS;
296         unsigned long   flags;
297         enum bfi_tskim_status task_status;
298
299         spin_lock_irqsave(&bfad->bfad_lock, flags);
300         itnim = itnim_data->itnim;
301         if (!itnim) {
302                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
303                 rc = FAILED;
304                 goto out;
305         }
306
307         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
308         if (!tskim) {
309                 BFA_DEV_PRINTF(bfad, BFA_ERR,
310                                 "LUN reset, fail to allocate tskim");
311                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
312                 rc = FAILED;
313                 goto out;
314         }
315
316         /**
317          * Set host_scribble to NULL to avoid aborting a task command
318          * if happens.
319          */
320         cmnd->host_scribble = NULL;
321         cmnd->SCp.ptr = (char *)&wq;
322         cmnd->SCp.Status = 0;
323         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
324         bfa_tskim_start(tskim, bfa_itnim,
325                             bfad_int_to_lun(cmnd->device->lun),
326                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
327         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
328
329         wait_event(wq, test_bit(IO_DONE_BIT,
330                         (unsigned long *)&cmnd->SCp.Status));
331
332         task_status = cmnd->SCp.Status >> 1;
333         if (task_status != BFI_TSKIM_STS_OK) {
334                 BFA_DEV_PRINTF(bfad, BFA_ERR, "LUN reset failure, status: %d\n",
335                                task_status);
336                 rc = FAILED;
337         }
338
339 out:
340         return rc;
341 }
342
343 /**
344  * Scsi_Host template entry, resets the bus and abort all commands.
345  */
346 static int
347 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
348 {
349         struct Scsi_Host *shost = cmnd->device->host;
350         struct bfad_im_port_s *im_port =
351                                 (struct bfad_im_port_s *) shost->hostdata[0];
352         struct bfad_s         *bfad = im_port->bfad;
353         struct bfad_itnim_s   *itnim;
354         unsigned long   flags;
355         u32        i, rc, err_cnt = 0;
356         DECLARE_WAIT_QUEUE_HEAD(wq);
357         enum bfi_tskim_status task_status;
358
359         spin_lock_irqsave(&bfad->bfad_lock, flags);
360         for (i = 0; i < MAX_FCP_TARGET; i++) {
361                 itnim = bfad_os_get_itnim(im_port, i);
362                 if (itnim) {
363                         cmnd->SCp.ptr = (char *)&wq;
364                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
365                         if (rc != BFA_STATUS_OK) {
366                                 err_cnt++;
367                                 continue;
368                         }
369
370                         /* wait target reset to complete */
371                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
372                         wait_event(wq, test_bit(IO_DONE_BIT,
373                                         (unsigned long *)&cmnd->SCp.Status));
374                         spin_lock_irqsave(&bfad->bfad_lock, flags);
375
376                         task_status = cmnd->SCp.Status >> 1;
377                         if (task_status != BFI_TSKIM_STS_OK) {
378                                 BFA_DEV_PRINTF(bfad, BFA_ERR,
379                                         "target reset failure,"
380                                         " status: %d\n", task_status);
381                                 err_cnt++;
382                         }
383                 }
384         }
385         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
386
387         if (err_cnt)
388                 return FAILED;
389
390         return SUCCESS;
391 }
392
393 /**
394  * Scsi_Host template entry slave_destroy.
395  */
396 static void
397 bfad_im_slave_destroy(struct scsi_device *sdev)
398 {
399         sdev->hostdata = NULL;
400         return;
401 }
402
403 /**
404  *  BFA FCS itnim callbacks
405  */
406
407 /**
408  * BFA FCS itnim alloc callback, after successful PRLI
409  * Context: Interrupt
410  */
411 void
412 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
413                     struct bfad_itnim_s **itnim_drv)
414 {
415         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
416         if (*itnim_drv == NULL)
417                 return;
418
419         (*itnim_drv)->im = bfad->im;
420         *itnim = &(*itnim_drv)->fcs_itnim;
421         (*itnim_drv)->state = ITNIM_STATE_NONE;
422
423         /*
424          * Initiaze the itnim_work
425          */
426         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
427         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
428 }
429
430 /**
431  * BFA FCS itnim free callback.
432  * Context: Interrupt. bfad_lock is held
433  */
434 void
435 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
436 {
437         struct bfad_port_s    *port;
438         wwn_t wwpn;
439         u32 fcid;
440         char wwpn_str[32], fcid_str[16];
441
442         /* online to free state transtion should not happen */
443         bfa_assert(itnim_drv->state != ITNIM_STATE_ONLINE);
444
445         itnim_drv->queue_work = 1;
446         /* offline request is not yet done, use the same request to free */
447         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
448                 itnim_drv->queue_work = 0;
449
450         itnim_drv->state = ITNIM_STATE_FREE;
451         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
452         itnim_drv->im_port = port->im_port;
453         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
454         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
455         wwn2str(wwpn_str, wwpn);
456         fcid2str(fcid_str, fcid);
457         bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_FREE,
458                 port->im_port->shost->host_no,
459                 fcid_str, wwpn_str);
460         bfad_os_itnim_process(itnim_drv);
461 }
462
463 /**
464  * BFA FCS itnim online callback.
465  * Context: Interrupt. bfad_lock is held
466  */
467 void
468 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
469 {
470         struct bfad_port_s    *port;
471
472         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
473         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
474         itnim_drv->state = ITNIM_STATE_ONLINE;
475         itnim_drv->queue_work = 1;
476         itnim_drv->im_port = port->im_port;
477         bfad_os_itnim_process(itnim_drv);
478 }
479
480 /**
481  * BFA FCS itnim offline callback.
482  * Context: Interrupt. bfad_lock is held
483  */
484 void
485 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
486 {
487         struct bfad_port_s    *port;
488         struct bfad_s *bfad;
489
490         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
491         bfad = port->bfad;
492         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
493                  (port->flags & BFAD_PORT_DELETE)) {
494                 itnim_drv->state = ITNIM_STATE_OFFLINE;
495                 return;
496         }
497         itnim_drv->im_port = port->im_port;
498         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
499         itnim_drv->queue_work = 1;
500         bfad_os_itnim_process(itnim_drv);
501 }
502
503 /**
504  * BFA FCS itnim timeout callback.
505  * Context: Interrupt. bfad_lock is held
506  */
507 void bfa_fcb_itnim_tov(struct bfad_itnim_s *itnim)
508 {
509         itnim->state = ITNIM_STATE_TIMEOUT;
510 }
511
512 /**
513  * Allocate a Scsi_Host for a port.
514  */
515 int
516 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
517                                 struct device *dev)
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         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
547                 im_port->shost->transportt = bfad_im_scsi_transport_template;
548         else
549                 im_port->shost->transportt =
550                                 bfad_im_scsi_vport_transport_template;
551
552         error = scsi_add_host(im_port->shost, dev);
553         if (error) {
554                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
555                 goto out_fc_rel;
556         }
557
558         /* setup host fixed attribute if the lk supports */
559         bfad_os_fc_host_init(im_port);
560
561         return 0;
562
563 out_fc_rel:
564         scsi_host_put(im_port->shost);
565 out_free_idr:
566         idr_remove(&bfad_im_port_index, im_port->idr_id);
567 out:
568         return error;
569 }
570
571 void
572 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
573 {
574         unsigned long flags;
575
576         bfa_trc(bfad, bfad->inst_no);
577         bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_HOST_FREE,
578                         im_port->shost->host_no);
579
580         fc_remove_host(im_port->shost);
581
582         scsi_remove_host(im_port->shost);
583         scsi_host_put(im_port->shost);
584
585         spin_lock_irqsave(&bfad->bfad_lock, flags);
586         idr_remove(&bfad_im_port_index, im_port->idr_id);
587         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
588 }
589
590 static void
591 bfad_im_port_delete_handler(struct work_struct *work)
592 {
593         struct bfad_im_port_s *im_port =
594                 container_of(work, struct bfad_im_port_s, port_delete_work);
595
596         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
597                 im_port->flags |= BFAD_PORT_DELETE;
598                 fc_vport_terminate(im_port->fc_vport);
599         }
600
601 }
602
603 bfa_status_t
604 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
605 {
606         int             rc = BFA_STATUS_OK;
607         struct bfad_im_port_s *im_port;
608
609         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
610         if (im_port == NULL) {
611                 rc = BFA_STATUS_ENOMEM;
612                 goto ext;
613         }
614         port->im_port = im_port;
615         im_port->port = port;
616         im_port->bfad = bfad;
617
618         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
619         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
620         INIT_LIST_HEAD(&im_port->binding_list);
621
622 ext:
623         return rc;
624 }
625
626 void
627 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
628 {
629         struct bfad_im_port_s *im_port = port->im_port;
630
631         queue_work(bfad->im->drv_workq,
632                                 &im_port->port_delete_work);
633 }
634
635 void
636 bfad_im_port_clean(struct bfad_im_port_s *im_port)
637 {
638         struct bfad_fcp_binding *bp, *bp_new;
639         unsigned long flags;
640         struct bfad_s *bfad =  im_port->bfad;
641
642         spin_lock_irqsave(&bfad->bfad_lock, flags);
643         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
644                                         list_entry) {
645                 list_del(&bp->list_entry);
646                 kfree(bp);
647         }
648
649         /* the itnim_mapped_list must be empty at this time */
650         bfa_assert(list_empty(&im_port->itnim_mapped_list));
651
652         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
653 }
654
655 void
656 bfad_im_port_online(struct bfad_s *bfad, struct bfad_port_s *port)
657 {
658 }
659
660 void
661 bfad_im_port_offline(struct bfad_s *bfad, struct bfad_port_s *port)
662 {
663 }
664
665 bfa_status_t
666 bfad_im_probe(struct bfad_s *bfad)
667 {
668         struct bfad_im_s      *im;
669         bfa_status_t    rc = BFA_STATUS_OK;
670
671         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
672         if (im == NULL) {
673                 rc = BFA_STATUS_ENOMEM;
674                 goto ext;
675         }
676
677         bfad->im = im;
678         im->bfad = bfad;
679
680         if (bfad_os_thread_workq(bfad) != BFA_STATUS_OK) {
681                 kfree(im);
682                 rc = BFA_STATUS_FAILED;
683         }
684
685 ext:
686         return rc;
687 }
688
689 void
690 bfad_im_probe_undo(struct bfad_s *bfad)
691 {
692         if (bfad->im) {
693                 bfad_os_destroy_workq(bfad->im);
694                 kfree(bfad->im);
695                 bfad->im = NULL;
696         }
697 }
698
699 struct Scsi_Host *
700 bfad_os_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
701 {
702         struct scsi_host_template *sht;
703
704         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
705                 sht = &bfad_im_scsi_host_template;
706         else
707                 sht = &bfad_im_vport_template;
708
709         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
710
711         return scsi_host_alloc(sht, sizeof(unsigned long));
712 }
713
714 void
715 bfad_os_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
716 {
717         if (!(im_port->flags & BFAD_PORT_DELETE))
718                 flush_workqueue(bfad->im->drv_workq);
719         bfad_im_scsi_host_free(im_port->bfad, im_port);
720         bfad_im_port_clean(im_port);
721         kfree(im_port);
722 }
723
724 void
725 bfad_os_destroy_workq(struct bfad_im_s *im)
726 {
727         if (im && im->drv_workq) {
728                 destroy_workqueue(im->drv_workq);
729                 im->drv_workq = NULL;
730         }
731 }
732
733 bfa_status_t
734 bfad_os_thread_workq(struct bfad_s *bfad)
735 {
736         struct bfad_im_s      *im = bfad->im;
737
738         bfa_trc(bfad, 0);
739         snprintf(im->drv_workq_name, BFAD_KOBJ_NAME_LEN, "bfad_wq_%d",
740                  bfad->inst_no);
741         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
742         if (!im->drv_workq)
743                 return BFA_STATUS_FAILED;
744
745         return BFA_STATUS_OK;
746 }
747
748 /**
749  * Scsi_Host template entry.
750  *
751  * Description:
752  * OS entry point to adjust the queue_depths on a per-device basis.
753  * Called once per device during the bus scan.
754  * Return non-zero if fails.
755  */
756 static int
757 bfad_im_slave_configure(struct scsi_device *sdev)
758 {
759         if (sdev->tagged_supported)
760                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
761         else
762                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
763
764         return 0;
765 }
766
767 struct scsi_host_template bfad_im_scsi_host_template = {
768         .module = THIS_MODULE,
769         .name = BFAD_DRIVER_NAME,
770         .info = bfad_im_info,
771         .queuecommand = bfad_im_queuecommand,
772         .eh_abort_handler = bfad_im_abort_handler,
773         .eh_device_reset_handler = bfad_im_reset_lun_handler,
774         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
775
776         .slave_alloc = bfad_im_slave_alloc,
777         .slave_configure = bfad_im_slave_configure,
778         .slave_destroy = bfad_im_slave_destroy,
779
780         .this_id = -1,
781         .sg_tablesize = BFAD_IO_MAX_SGE,
782         .cmd_per_lun = 3,
783         .use_clustering = ENABLE_CLUSTERING,
784         .shost_attrs = bfad_im_host_attrs,
785         .max_sectors = 0xFFFF,
786 };
787
788 struct scsi_host_template bfad_im_vport_template = {
789         .module = THIS_MODULE,
790         .name = BFAD_DRIVER_NAME,
791         .info = bfad_im_info,
792         .queuecommand = bfad_im_queuecommand,
793         .eh_abort_handler = bfad_im_abort_handler,
794         .eh_device_reset_handler = bfad_im_reset_lun_handler,
795         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
796
797         .slave_alloc = bfad_im_slave_alloc,
798         .slave_configure = bfad_im_slave_configure,
799         .slave_destroy = bfad_im_slave_destroy,
800
801         .this_id = -1,
802         .sg_tablesize = BFAD_IO_MAX_SGE,
803         .cmd_per_lun = 3,
804         .use_clustering = ENABLE_CLUSTERING,
805         .shost_attrs = bfad_im_vport_attrs,
806         .max_sectors = 0xFFFF,
807 };
808
809 void
810 bfad_im_probe_post(struct bfad_im_s *im)
811 {
812         flush_workqueue(im->drv_workq);
813 }
814
815 bfa_status_t
816 bfad_im_module_init(void)
817 {
818         bfad_im_scsi_transport_template =
819                 fc_attach_transport(&bfad_im_fc_function_template);
820         if (!bfad_im_scsi_transport_template)
821                 return BFA_STATUS_ENOMEM;
822
823         bfad_im_scsi_vport_transport_template =
824                 fc_attach_transport(&bfad_im_vport_fc_function_template);
825         if (!bfad_im_scsi_vport_transport_template) {
826                 fc_release_transport(bfad_im_scsi_transport_template);
827                 return BFA_STATUS_ENOMEM;
828         }
829
830         return BFA_STATUS_OK;
831 }
832
833 void
834 bfad_im_module_exit(void)
835 {
836         if (bfad_im_scsi_transport_template)
837                 fc_release_transport(bfad_im_scsi_transport_template);
838         if (bfad_im_scsi_vport_transport_template)
839                 fc_release_transport(bfad_im_scsi_vport_transport_template);
840 }
841
842 void
843 bfad_os_itnim_process(struct bfad_itnim_s *itnim_drv)
844 {
845         struct bfad_im_s      *im = itnim_drv->im;
846
847         if (itnim_drv->queue_work)
848                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
849 }
850
851 void
852 bfad_os_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
853 {
854         struct scsi_device *tmp_sdev;
855
856         if (((jiffies - itnim->last_ramp_up_time) >
857                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
858                 ((jiffies - itnim->last_queue_full_time) >
859                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
860                 shost_for_each_device(tmp_sdev, sdev->host) {
861                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
862                                 if (tmp_sdev->id != sdev->id)
863                                         continue;
864                                 if (tmp_sdev->ordered_tags)
865                                         scsi_adjust_queue_depth(tmp_sdev,
866                                                 MSG_ORDERED_TAG,
867                                                 tmp_sdev->queue_depth + 1);
868                                 else
869                                         scsi_adjust_queue_depth(tmp_sdev,
870                                                 MSG_SIMPLE_TAG,
871                                                 tmp_sdev->queue_depth + 1);
872
873                                 itnim->last_ramp_up_time = jiffies;
874                         }
875                 }
876         }
877 }
878
879 void
880 bfad_os_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
881 {
882         struct scsi_device *tmp_sdev;
883
884         itnim->last_queue_full_time = jiffies;
885
886         shost_for_each_device(tmp_sdev, sdev->host) {
887                 if (tmp_sdev->id != sdev->id)
888                         continue;
889                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
890         }
891 }
892
893
894
895
896 struct bfad_itnim_s *
897 bfad_os_get_itnim(struct bfad_im_port_s *im_port, int id)
898 {
899         struct bfad_itnim_s   *itnim = NULL;
900
901         /* Search the mapped list for this target ID */
902         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
903                 if (id == itnim->scsi_tgt_id)
904                         return itnim;
905         }
906
907         return NULL;
908 }
909
910 /**
911  * Scsi_Host template entry slave_alloc
912  */
913 static int
914 bfad_im_slave_alloc(struct scsi_device *sdev)
915 {
916         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
917
918         if (!rport || fc_remote_port_chkready(rport))
919                 return -ENXIO;
920
921         sdev->hostdata = rport->dd_data;
922
923         return 0;
924 }
925
926 void
927 bfad_os_fc_host_init(struct bfad_im_port_s *im_port)
928 {
929         struct Scsi_Host *host = im_port->shost;
930         struct bfad_s         *bfad = im_port->bfad;
931         struct bfad_port_s    *port = im_port->port;
932         struct bfa_pport_attr_s pattr;
933         char model[BFA_ADAPTER_MODEL_NAME_LEN];
934         char fw_ver[BFA_VERSION_LEN];
935
936         fc_host_node_name(host) =
937                 bfa_os_htonll((bfa_fcs_port_get_nwwn(port->fcs_port)));
938         fc_host_port_name(host) =
939                 bfa_os_htonll((bfa_fcs_port_get_pwwn(port->fcs_port)));
940         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
941
942         fc_host_supported_classes(host) = FC_COS_CLASS3;
943
944         memset(fc_host_supported_fc4s(host), 0,
945                sizeof(fc_host_supported_fc4s(host)));
946         if (bfad_supported_fc4s & (BFA_PORT_ROLE_FCP_IM | BFA_PORT_ROLE_FCP_TM))
947                 /* For FCP type 0x08 */
948                 fc_host_supported_fc4s(host)[2] = 1;
949         if (bfad_supported_fc4s & BFA_PORT_ROLE_FCP_IPFC)
950                 /* For LLC/SNAP type 0x05 */
951                 fc_host_supported_fc4s(host)[3] = 0x20;
952         /* For fibre channel services type 0x20 */
953         fc_host_supported_fc4s(host)[7] = 1;
954
955         bfa_get_adapter_model(&bfad->bfa, model);
956         bfa_get_adapter_fw_ver(&bfad->bfa, fw_ver);
957         sprintf(fc_host_symbolic_name(host), "Brocade %s FV%s DV%s",
958                 model, fw_ver, BFAD_DRIVER_VERSION);
959
960         fc_host_supported_speeds(host) = 0;
961         fc_host_supported_speeds(host) |=
962                 FC_PORTSPEED_8GBIT | FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
963                 FC_PORTSPEED_1GBIT;
964
965         bfa_fcport_get_attr(&bfad->bfa, &pattr);
966         fc_host_maxframe_size(host) = pattr.pport_cfg.maxfrsize;
967 }
968
969 static void
970 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
971 {
972         struct fc_rport_identifiers rport_ids;
973         struct fc_rport *fc_rport;
974         struct bfad_itnim_data_s *itnim_data;
975
976         rport_ids.node_name =
977                 bfa_os_htonll(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
978         rport_ids.port_name =
979                 bfa_os_htonll(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
980         rport_ids.port_id =
981                 bfa_os_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
982         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
983
984         itnim->fc_rport = fc_rport =
985                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
986
987         if (!fc_rport)
988                 return;
989
990         fc_rport->maxframe_size =
991                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
992         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
993
994         itnim_data = fc_rport->dd_data;
995         itnim_data->itnim = itnim;
996
997         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
998
999         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1000                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1001
1002         if ((fc_rport->scsi_target_id != -1)
1003             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1004                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1005
1006         return;
1007 }
1008
1009 /**
1010  * Work queue handler using FC transport service
1011 * Context: kernel
1012  */
1013 static void
1014 bfad_im_itnim_work_handler(struct work_struct *work)
1015 {
1016         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1017                                                         itnim_work);
1018         struct bfad_im_s      *im = itnim->im;
1019         struct bfad_s         *bfad = im->bfad;
1020         struct bfad_im_port_s *im_port;
1021         unsigned long   flags;
1022         struct fc_rport *fc_rport;
1023         wwn_t wwpn;
1024         u32 fcid;
1025         char wwpn_str[32], fcid_str[16];
1026
1027         spin_lock_irqsave(&bfad->bfad_lock, flags);
1028         im_port = itnim->im_port;
1029         bfa_trc(bfad, itnim->state);
1030         switch (itnim->state) {
1031         case ITNIM_STATE_ONLINE:
1032                 if (!itnim->fc_rport) {
1033                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1034                         bfad_im_fc_rport_add(im_port, itnim);
1035                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1036                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1037                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1038                         wwn2str(wwpn_str, wwpn);
1039                         fcid2str(fcid_str, fcid);
1040                         list_add_tail(&itnim->list_entry,
1041                                 &im_port->itnim_mapped_list);
1042                         bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_ONLINE,
1043                                 im_port->shost->host_no,
1044                                 itnim->scsi_tgt_id,
1045                                 fcid_str, wwpn_str);
1046                 } else {
1047                         printk(KERN_WARNING
1048                                 "%s: itnim %llx is already in online state\n",
1049                                 __func__,
1050                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1051                 }
1052
1053                 break;
1054         case ITNIM_STATE_OFFLINE_PENDING:
1055                 itnim->state = ITNIM_STATE_OFFLINE;
1056                 if (itnim->fc_rport) {
1057                         fc_rport = itnim->fc_rport;
1058                         ((struct bfad_itnim_data_s *)
1059                                 fc_rport->dd_data)->itnim = NULL;
1060                         itnim->fc_rport = NULL;
1061                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1062                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1063                                 fc_rport->dev_loss_tmo =
1064                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1065                                 fc_remote_port_delete(fc_rport);
1066                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1067                         }
1068                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1069                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1070                         wwn2str(wwpn_str, wwpn);
1071                         fcid2str(fcid_str, fcid);
1072                         list_del(&itnim->list_entry);
1073                         bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_OFFLINE,
1074                                 im_port->shost->host_no,
1075                                 itnim->scsi_tgt_id,
1076                                 fcid_str, wwpn_str);
1077                 }
1078                 break;
1079         case ITNIM_STATE_FREE:
1080                 if (itnim->fc_rport) {
1081                         fc_rport = itnim->fc_rport;
1082                         ((struct bfad_itnim_data_s *)
1083                                 fc_rport->dd_data)->itnim = NULL;
1084                         itnim->fc_rport = NULL;
1085                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1086                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1087                                 fc_rport->dev_loss_tmo =
1088                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1089                                 fc_remote_port_delete(fc_rport);
1090                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1091                         }
1092                         list_del(&itnim->list_entry);
1093                 }
1094
1095                 kfree(itnim);
1096                 break;
1097         default:
1098                 bfa_assert(0);
1099                 break;
1100         }
1101
1102         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1103 }
1104
1105 /**
1106  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1107  */
1108 static int
1109 bfad_im_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1110 {
1111         struct bfad_im_port_s *im_port =
1112                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1113         struct bfad_s         *bfad = im_port->bfad;
1114         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1115         struct bfad_itnim_s   *itnim;
1116         struct bfa_ioim_s *hal_io;
1117         unsigned long   flags;
1118         int             rc;
1119         s16        sg_cnt = 0;
1120         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1121
1122         rc = fc_remote_port_chkready(rport);
1123         if (rc) {
1124                 cmnd->result = rc;
1125                 done(cmnd);
1126                 return 0;
1127         }
1128
1129         sg_cnt = scsi_dma_map(cmnd);
1130
1131         if (sg_cnt < 0)
1132                 return SCSI_MLQUEUE_HOST_BUSY;
1133
1134         cmnd->scsi_done = done;
1135
1136         spin_lock_irqsave(&bfad->bfad_lock, flags);
1137         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1138                 printk(KERN_WARNING
1139                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1140                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1141                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1142                 goto out_fail_cmd;
1143         }
1144
1145         itnim = itnim_data->itnim;
1146         if (!itnim) {
1147                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1148                 goto out_fail_cmd;
1149         }
1150
1151         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1152                                     itnim->bfa_itnim, sg_cnt);
1153         if (!hal_io) {
1154                 printk(KERN_WARNING "hal_io failure\n");
1155                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1156                 scsi_dma_unmap(cmnd);
1157                 return SCSI_MLQUEUE_HOST_BUSY;
1158         }
1159
1160         cmnd->host_scribble = (char *)hal_io;
1161         bfa_trc_fp(bfad, hal_io->iotag);
1162         bfa_ioim_start(hal_io);
1163         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1164
1165         return 0;
1166
1167 out_fail_cmd:
1168         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1169         scsi_dma_unmap(cmnd);
1170         if (done)
1171                 done(cmnd);
1172
1173         return 0;
1174 }
1175
1176 void
1177 bfad_os_rport_online_wait(struct bfad_s *bfad)
1178 {
1179         int i;
1180         int rport_delay = 10;
1181
1182         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1183                  && i < bfa_linkup_delay; i++)
1184                 schedule_timeout_uninterruptible(HZ);
1185
1186         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1187                 rport_delay = rport_delay < bfa_linkup_delay ?
1188                                  rport_delay : bfa_linkup_delay;
1189                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1190                          && i < rport_delay; i++)
1191                         schedule_timeout_uninterruptible(HZ);
1192
1193                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE))
1194                         schedule_timeout_uninterruptible(rport_delay * HZ);
1195         }
1196 }
1197
1198 int
1199 bfad_os_get_linkup_delay(struct bfad_s *bfad)
1200 {
1201
1202         u8         nwwns = 0;
1203         wwn_t           *wwns;
1204         int             ldelay;
1205
1206         /*
1207          * Querying for the boot target port wwns
1208          * -- read from boot information in flash.
1209          * If nwwns > 0 => boot over SAN and set bfa_linkup_delay = 30
1210          * else => local boot machine set bfa_linkup_delay = 10
1211          */
1212
1213         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, &wwns);
1214
1215         if (nwwns > 0) {
1216                 /* If boot over SAN; linkup_delay = 30sec */
1217                 ldelay = 30;
1218         } else {
1219                 /* If local boot; linkup_delay = 10sec */
1220                 ldelay = 0;
1221         }
1222
1223         return ldelay;
1224 }
1225
1226