[SCSI] bfa: fix test in bfad_os_fc_host_init()
[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 "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