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ath9k_hw: Add radio retention support for AR9480
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / bnx2fc / bnx2fc_io.c
blob45eba6d609c9a6f8d989941329636b79fd94b19a
1 /* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver.
2 * IO manager and SCSI IO processing.
3 *
4 * Copyright (c) 2008 - 2010 Broadcom Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
11 */
12
13 #include "bnx2fc.h"
14
15 #define RESERVE_FREE_LIST_INDEX num_possible_cpus()
16
17 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
18 int bd_index);
19 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
20 static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
21 static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
22 struct bnx2fc_cmd *io_req);
23 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
24 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
25 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
26 struct fcoe_fcp_rsp_payload *fcp_rsp,
27 u8 num_rq);
28
29 void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
30 unsigned int timer_msec)
31 {
32 struct bnx2fc_hba *hba = io_req->port->priv;
33
34 if (queue_delayed_work(hba->timer_work_queue, &io_req->timeout_work,
35 msecs_to_jiffies(timer_msec)))
36 kref_get(&io_req->refcount);
37 }
38
39 static void bnx2fc_cmd_timeout(struct work_struct *work)
40 {
41 struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,
42 timeout_work.work);
43 struct fc_lport *lport;
44 struct fc_rport_priv *rdata;
45 u8 cmd_type = io_req->cmd_type;
46 struct bnx2fc_rport *tgt = io_req->tgt;
47 int logo_issued;
48 int rc;
49
50 BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"
51 "req_flags = %lx\n", cmd_type, io_req->req_flags);
52
53 spin_lock_bh(&tgt->tgt_lock);
54 if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {
55 clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
56 /*
57 * ideally we should hold the io_req until RRQ complets,
58 * and release io_req from timeout hold.
59 */
60 spin_unlock_bh(&tgt->tgt_lock);
61 bnx2fc_send_rrq(io_req);
62 return;
63 }
64 if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {
65 BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");
66 goto done;
67 }
68
69 switch (cmd_type) {
70 case BNX2FC_SCSI_CMD:
71 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
72 &io_req->req_flags)) {
73 /* Handle eh_abort timeout */
74 BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");
75 complete(&io_req->tm_done);
76 } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,
77 &io_req->req_flags)) {
78 /* Handle internally generated ABTS timeout */
79 BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",
80 io_req->refcount.refcount.counter);
81 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
82 &io_req->req_flags))) {
83
84 lport = io_req->port->lport;
85 rdata = io_req->tgt->rdata;
86 logo_issued = test_and_set_bit(
87 BNX2FC_FLAG_EXPL_LOGO,
88 &tgt->flags);
89 kref_put(&io_req->refcount, bnx2fc_cmd_release);
90 spin_unlock_bh(&tgt->tgt_lock);
91
92 /* Explicitly logo the target */
93 if (!logo_issued) {
94 BNX2FC_IO_DBG(io_req, "Explicit "
95 "logo - tgt flags = 0x%lx\n",
96 tgt->flags);
97
98 mutex_lock(&lport->disc.disc_mutex);
99 lport->tt.rport_logoff(rdata);
100 mutex_unlock(&lport->disc.disc_mutex);
101 }
102 return;
103 }
104 } else {
105 /* Hanlde IO timeout */
106 BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");
107 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,
108 &io_req->req_flags)) {
109 BNX2FC_IO_DBG(io_req, "IO completed before "
110 " timer expiry\n");
111 goto done;
112 }
113
114 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
115 &io_req->req_flags)) {
116 rc = bnx2fc_initiate_abts(io_req);
117 if (rc == SUCCESS)
118 goto done;
119 /*
120 * Explicitly logo the target if
121 * abts initiation fails
122 */
123 lport = io_req->port->lport;
124 rdata = io_req->tgt->rdata;
125 logo_issued = test_and_set_bit(
126 BNX2FC_FLAG_EXPL_LOGO,
127 &tgt->flags);
128 kref_put(&io_req->refcount, bnx2fc_cmd_release);
129 spin_unlock_bh(&tgt->tgt_lock);
130
131 if (!logo_issued) {
132 BNX2FC_IO_DBG(io_req, "Explicit "
133 "logo - tgt flags = 0x%lx\n",
134 tgt->flags);
135
136
137 mutex_lock(&lport->disc.disc_mutex);
138 lport->tt.rport_logoff(rdata);
139 mutex_unlock(&lport->disc.disc_mutex);
140 }
141 return;
142 } else {
143 BNX2FC_IO_DBG(io_req, "IO already in "
144 "ABTS processing\n");
145 }
146 }
147 break;
148 case BNX2FC_ELS:
149
150 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
151 BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");
152
153 if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
154 &io_req->req_flags)) {
155 lport = io_req->port->lport;
156 rdata = io_req->tgt->rdata;
157 logo_issued = test_and_set_bit(
158 BNX2FC_FLAG_EXPL_LOGO,
159 &tgt->flags);
160 kref_put(&io_req->refcount, bnx2fc_cmd_release);
161 spin_unlock_bh(&tgt->tgt_lock);
162
163 /* Explicitly logo the target */
164 if (!logo_issued) {
165 BNX2FC_IO_DBG(io_req, "Explicitly logo"
166 "(els)\n");
167 mutex_lock(&lport->disc.disc_mutex);
168 lport->tt.rport_logoff(rdata);
169 mutex_unlock(&lport->disc.disc_mutex);
170 }
171 return;
172 }
173 } else {
174 /*
175 * Handle ELS timeout.
176 * tgt_lock is used to sync compl path and timeout
177 * path. If els compl path is processing this IO, we
178 * have nothing to do here, just release the timer hold
179 */
180 BNX2FC_IO_DBG(io_req, "ELS timed out\n");
181 if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
182 &io_req->req_flags))
183 goto done;
184
185 /* Indicate the cb_func that this ELS is timed out */
186 set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);
187
188 if ((io_req->cb_func) && (io_req->cb_arg)) {
189 io_req->cb_func(io_req->cb_arg);
190 io_req->cb_arg = NULL;
191 }
192 }
193 break;
194 default:
195 printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",
196 cmd_type);
197 break;
198 }
199
200 done:
201 /* release the cmd that was held when timer was set */
202 kref_put(&io_req->refcount, bnx2fc_cmd_release);
203 spin_unlock_bh(&tgt->tgt_lock);
204 }
205
206 static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
207 {
208 /* Called with host lock held */
209 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
210
211 /*
212 * active_cmd_queue may have other command types as well,
213 * and during flush operation, we want to error back only
214 * scsi commands.
215 */
216 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
217 return;
218
219 BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
220 bnx2fc_unmap_sg_list(io_req);
221 io_req->sc_cmd = NULL;
222 if (!sc_cmd) {
223 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
224 "IO(0x%x) already cleaned up\n",
225 io_req->xid);
226 return;
227 }
228 sc_cmd->result = err_code << 16;
229
230 BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
231 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
232 sc_cmd->allowed);
233 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
234 sc_cmd->SCp.ptr = NULL;
235 sc_cmd->scsi_done(sc_cmd);
236 }
237
238 struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
239 u16 min_xid, u16 max_xid)
240 {
241 struct bnx2fc_cmd_mgr *cmgr;
242 struct io_bdt *bdt_info;
243 struct bnx2fc_cmd *io_req;
244 size_t len;
245 u32 mem_size;
246 u16 xid;
247 int i;
248 int num_ios, num_pri_ios;
249 size_t bd_tbl_sz;
250 int arr_sz = num_possible_cpus() + 1;
251
252 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
253 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
254 and max_xid 0x%x\n", min_xid, max_xid);
255 return NULL;
256 }
257 BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
258
259 num_ios = max_xid - min_xid + 1;
260 len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
261 len += sizeof(struct bnx2fc_cmd_mgr);
262
263 cmgr = kzalloc(len, GFP_KERNEL);
264 if (!cmgr) {
265 printk(KERN_ERR PFX "failed to alloc cmgr\n");
266 return NULL;
267 }
268
269 cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
270 arr_sz, GFP_KERNEL);
271 if (!cmgr->free_list) {
272 printk(KERN_ERR PFX "failed to alloc free_list\n");
273 goto mem_err;
274 }
275
276 cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
277 arr_sz, GFP_KERNEL);
278 if (!cmgr->free_list_lock) {
279 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
280 goto mem_err;
281 }
282
283 cmgr->hba = hba;
284 cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
285
286 for (i = 0; i < arr_sz; i++) {
287 INIT_LIST_HEAD(&cmgr->free_list[i]);
288 spin_lock_init(&cmgr->free_list_lock[i]);
289 }
290
291 /*
292 * Pre-allocated pool of bnx2fc_cmds.
293 * Last entry in the free list array is the free list
294 * of slow path requests.
295 */
296 xid = BNX2FC_MIN_XID;
297 num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS;
298 for (i = 0; i < num_ios; i++) {
299 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
300
301 if (!io_req) {
302 printk(KERN_ERR PFX "failed to alloc io_req\n");
303 goto mem_err;
304 }
305
306 INIT_LIST_HEAD(&io_req->link);
307 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
308
309 io_req->xid = xid++;
310 if (i < num_pri_ios)
311 list_add_tail(&io_req->link,
312 &cmgr->free_list[io_req->xid %
313 num_possible_cpus()]);
314 else
315 list_add_tail(&io_req->link,
316 &cmgr->free_list[num_possible_cpus()]);
317 io_req++;
318 }
319
320 /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
321 mem_size = num_ios * sizeof(struct io_bdt *);
322 cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL);
323 if (!cmgr->io_bdt_pool) {
324 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
325 goto mem_err;
326 }
327
328 mem_size = sizeof(struct io_bdt);
329 for (i = 0; i < num_ios; i++) {
330 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
331 if (!cmgr->io_bdt_pool[i]) {
332 printk(KERN_ERR PFX "failed to alloc "
333 "io_bdt_pool[%d]\n", i);
334 goto mem_err;
335 }
336 }
337
338 /* Allocate an map fcoe_bdt_ctx structures */
339 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
340 for (i = 0; i < num_ios; i++) {
341 bdt_info = cmgr->io_bdt_pool[i];
342 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
343 bd_tbl_sz,
344 &bdt_info->bd_tbl_dma,
345 GFP_KERNEL);
346 if (!bdt_info->bd_tbl) {
347 printk(KERN_ERR PFX "failed to alloc "
348 "bdt_tbl[%d]\n", i);
349 goto mem_err;
350 }
351 }
352
353 return cmgr;
354
355 mem_err:
356 bnx2fc_cmd_mgr_free(cmgr);
357 return NULL;
358 }
359
360 void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
361 {
362 struct io_bdt *bdt_info;
363 struct bnx2fc_hba *hba = cmgr->hba;
364 size_t bd_tbl_sz;
365 u16 min_xid = BNX2FC_MIN_XID;
366 u16 max_xid = BNX2FC_MAX_XID;
367 int num_ios;
368 int i;
369
370 num_ios = max_xid - min_xid + 1;
371
372 /* Free fcoe_bdt_ctx structures */
373 if (!cmgr->io_bdt_pool)
374 goto free_cmd_pool;
375
376 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
377 for (i = 0; i < num_ios; i++) {
378 bdt_info = cmgr->io_bdt_pool[i];
379 if (bdt_info->bd_tbl) {
380 dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
381 bdt_info->bd_tbl,
382 bdt_info->bd_tbl_dma);
383 bdt_info->bd_tbl = NULL;
384 }
385 }
386
387 /* Destroy io_bdt pool */
388 for (i = 0; i < num_ios; i++) {
389 kfree(cmgr->io_bdt_pool[i]);
390 cmgr->io_bdt_pool[i] = NULL;
391 }
392
393 kfree(cmgr->io_bdt_pool);
394 cmgr->io_bdt_pool = NULL;
395
396 free_cmd_pool:
397 kfree(cmgr->free_list_lock);
398
399 /* Destroy cmd pool */
400 if (!cmgr->free_list)
401 goto free_cmgr;
402
403 for (i = 0; i < num_possible_cpus() + 1; i++) {
404 struct list_head *list;
405 struct list_head *tmp;
406
407 list_for_each_safe(list, tmp, &cmgr->free_list[i]) {
408 struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list;
409 list_del(&io_req->link);
410 kfree(io_req);
411 }
412 }
413 kfree(cmgr->free_list);
414 free_cmgr:
415 /* Free command manager itself */
416 kfree(cmgr);
417 }
418
419 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
420 {
421 struct fcoe_port *port = tgt->port;
422 struct bnx2fc_hba *hba = port->priv;
423 struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr;
424 struct bnx2fc_cmd *io_req;
425 struct list_head *listp;
426 struct io_bdt *bd_tbl;
427 int index = RESERVE_FREE_LIST_INDEX;
428 u32 free_sqes;
429 u32 max_sqes;
430 u16 xid;
431
432 max_sqes = tgt->max_sqes;
433 switch (type) {
434 case BNX2FC_TASK_MGMT_CMD:
435 max_sqes = BNX2FC_TM_MAX_SQES;
436 break;
437 case BNX2FC_ELS:
438 max_sqes = BNX2FC_ELS_MAX_SQES;
439 break;
440 default:
441 break;
442 }
443
444 /*
445 * NOTE: Free list insertions and deletions are protected with
446 * cmgr lock
447 */
448 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
449 free_sqes = atomic_read(&tgt->free_sqes);
450 if ((list_empty(&(cmd_mgr->free_list[index]))) ||
451 (tgt->num_active_ios.counter >= max_sqes) ||
452 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
453 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
454 "ios(%d):sqes(%d)\n",
455 tgt->num_active_ios.counter, tgt->max_sqes);
456 if (list_empty(&(cmd_mgr->free_list[index])))
457 printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
458 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
459 return NULL;
460 }
461
462 listp = (struct list_head *)
463 cmd_mgr->free_list[index].next;
464 list_del_init(listp);
465 io_req = (struct bnx2fc_cmd *) listp;
466 xid = io_req->xid;
467 cmd_mgr->cmds[xid] = io_req;
468 atomic_inc(&tgt->num_active_ios);
469 atomic_dec(&tgt->free_sqes);
470 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
471
472 INIT_LIST_HEAD(&io_req->link);
473
474 io_req->port = port;
475 io_req->cmd_mgr = cmd_mgr;
476 io_req->req_flags = 0;
477 io_req->cmd_type = type;
478
479 /* Bind io_bdt for this io_req */
480 /* Have a static link between io_req and io_bdt_pool */
481 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
482 bd_tbl->io_req = io_req;
483
484 /* Hold the io_req against deletion */
485 kref_init(&io_req->refcount);
486 return io_req;
487 }
488 static struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
489 {
490 struct fcoe_port *port = tgt->port;
491 struct bnx2fc_hba *hba = port->priv;
492 struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr;
493 struct bnx2fc_cmd *io_req;
494 struct list_head *listp;
495 struct io_bdt *bd_tbl;
496 u32 free_sqes;
497 u32 max_sqes;
498 u16 xid;
499 int index = get_cpu();
500
501 max_sqes = BNX2FC_SCSI_MAX_SQES;
502 /*
503 * NOTE: Free list insertions and deletions are protected with
504 * cmgr lock
505 */
506 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
507 free_sqes = atomic_read(&tgt->free_sqes);
508 if ((list_empty(&cmd_mgr->free_list[index])) ||
509 (tgt->num_active_ios.counter >= max_sqes) ||
510 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
511 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
512 put_cpu();
513 return NULL;
514 }
515
516 listp = (struct list_head *)
517 cmd_mgr->free_list[index].next;
518 list_del_init(listp);
519 io_req = (struct bnx2fc_cmd *) listp;
520 xid = io_req->xid;
521 cmd_mgr->cmds[xid] = io_req;
522 atomic_inc(&tgt->num_active_ios);
523 atomic_dec(&tgt->free_sqes);
524 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
525 put_cpu();
526
527 INIT_LIST_HEAD(&io_req->link);
528
529 io_req->port = port;
530 io_req->cmd_mgr = cmd_mgr;
531 io_req->req_flags = 0;
532
533 /* Bind io_bdt for this io_req */
534 /* Have a static link between io_req and io_bdt_pool */
535 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
536 bd_tbl->io_req = io_req;
537
538 /* Hold the io_req against deletion */
539 kref_init(&io_req->refcount);
540 return io_req;
541 }
542
543 void bnx2fc_cmd_release(struct kref *ref)
544 {
545 struct bnx2fc_cmd *io_req = container_of(ref,
546 struct bnx2fc_cmd, refcount);
547 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
548 int index;
549
550 if (io_req->cmd_type == BNX2FC_SCSI_CMD)
551 index = io_req->xid % num_possible_cpus();
552 else
553 index = RESERVE_FREE_LIST_INDEX;
554
555
556 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
557 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
558 bnx2fc_free_mp_resc(io_req);
559 cmd_mgr->cmds[io_req->xid] = NULL;
560 /* Delete IO from retire queue */
561 list_del_init(&io_req->link);
562 /* Add it to the free list */
563 list_add(&io_req->link,
564 &cmd_mgr->free_list[index]);
565 atomic_dec(&io_req->tgt->num_active_ios);
566 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
567
568 }
569
570 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
571 {
572 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
573 struct bnx2fc_hba *hba = io_req->port->priv;
574 size_t sz = sizeof(struct fcoe_bd_ctx);
575
576 /* clear tm flags */
577 mp_req->tm_flags = 0;
578 if (mp_req->mp_req_bd) {
579 dma_free_coherent(&hba->pcidev->dev, sz,
580 mp_req->mp_req_bd,
581 mp_req->mp_req_bd_dma);
582 mp_req->mp_req_bd = NULL;
583 }
584 if (mp_req->mp_resp_bd) {
585 dma_free_coherent(&hba->pcidev->dev, sz,
586 mp_req->mp_resp_bd,
587 mp_req->mp_resp_bd_dma);
588 mp_req->mp_resp_bd = NULL;
589 }
590 if (mp_req->req_buf) {
591 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
592 mp_req->req_buf,
593 mp_req->req_buf_dma);
594 mp_req->req_buf = NULL;
595 }
596 if (mp_req->resp_buf) {
597 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
598 mp_req->resp_buf,
599 mp_req->resp_buf_dma);
600 mp_req->resp_buf = NULL;
601 }
602 }
603
604 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
605 {
606 struct bnx2fc_mp_req *mp_req;
607 struct fcoe_bd_ctx *mp_req_bd;
608 struct fcoe_bd_ctx *mp_resp_bd;
609 struct bnx2fc_hba *hba = io_req->port->priv;
610 dma_addr_t addr;
611 size_t sz;
612
613 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
614 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
615
616 mp_req->req_len = sizeof(struct fcp_cmnd);
617 io_req->data_xfer_len = mp_req->req_len;
618 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
619 &mp_req->req_buf_dma,
620 GFP_ATOMIC);
621 if (!mp_req->req_buf) {
622 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
623 bnx2fc_free_mp_resc(io_req);
624 return FAILED;
625 }
626
627 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
628 &mp_req->resp_buf_dma,
629 GFP_ATOMIC);
630 if (!mp_req->resp_buf) {
631 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
632 bnx2fc_free_mp_resc(io_req);
633 return FAILED;
634 }
635 memset(mp_req->req_buf, 0, PAGE_SIZE);
636 memset(mp_req->resp_buf, 0, PAGE_SIZE);
637
638 /* Allocate and map mp_req_bd and mp_resp_bd */
639 sz = sizeof(struct fcoe_bd_ctx);
640 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
641 &mp_req->mp_req_bd_dma,
642 GFP_ATOMIC);
643 if (!mp_req->mp_req_bd) {
644 printk(KERN_ERR PFX "unable to alloc MP req bd\n");
645 bnx2fc_free_mp_resc(io_req);
646 return FAILED;
647 }
648 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
649 &mp_req->mp_resp_bd_dma,
650 GFP_ATOMIC);
651 if (!mp_req->mp_req_bd) {
652 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
653 bnx2fc_free_mp_resc(io_req);
654 return FAILED;
655 }
656 /* Fill bd table */
657 addr = mp_req->req_buf_dma;
658 mp_req_bd = mp_req->mp_req_bd;
659 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
660 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
661 mp_req_bd->buf_len = PAGE_SIZE;
662 mp_req_bd->flags = 0;
663
664 /*
665 * MP buffer is either a task mgmt command or an ELS.
666 * So the assumption is that it consumes a single bd
667 * entry in the bd table
668 */
669 mp_resp_bd = mp_req->mp_resp_bd;
670 addr = mp_req->resp_buf_dma;
671 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
672 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
673 mp_resp_bd->buf_len = PAGE_SIZE;
674 mp_resp_bd->flags = 0;
675
676 return SUCCESS;
677 }
678
679 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
680 {
681 struct fc_lport *lport;
682 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
683 struct fc_rport_libfc_priv *rp = rport->dd_data;
684 struct fcoe_port *port;
685 struct bnx2fc_hba *hba;
686 struct bnx2fc_rport *tgt;
687 struct bnx2fc_cmd *io_req;
688 struct bnx2fc_mp_req *tm_req;
689 struct fcoe_task_ctx_entry *task;
690 struct fcoe_task_ctx_entry *task_page;
691 struct Scsi_Host *host = sc_cmd->device->host;
692 struct fc_frame_header *fc_hdr;
693 struct fcp_cmnd *fcp_cmnd;
694 int task_idx, index;
695 int rc = SUCCESS;
696 u16 xid;
697 u32 sid, did;
698 unsigned long start = jiffies;
699
700 lport = shost_priv(host);
701 port = lport_priv(lport);
702 hba = port->priv;
703
704 if (rport == NULL) {
705 printk(KERN_ALERT PFX "device_reset: rport is NULL\n");
706 rc = FAILED;
707 goto tmf_err;
708 }
709
710 rc = fc_block_scsi_eh(sc_cmd);
711 if (rc)
712 return rc;
713
714 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
715 printk(KERN_ERR PFX "device_reset: link is not ready\n");
716 rc = FAILED;
717 goto tmf_err;
718 }
719 /* rport and tgt are allocated together, so tgt should be non-NULL */
720 tgt = (struct bnx2fc_rport *)&rp[1];
721
722 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
723 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
724 rc = FAILED;
725 goto tmf_err;
726 }
727 retry_tmf:
728 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
729 if (!io_req) {
730 if (time_after(jiffies, start + HZ)) {
731 printk(KERN_ERR PFX "tmf: Failed TMF");
732 rc = FAILED;
733 goto tmf_err;
734 }
735 msleep(20);
736 goto retry_tmf;
737 }
738 /* Initialize rest of io_req fields */
739 io_req->sc_cmd = sc_cmd;
740 io_req->port = port;
741 io_req->tgt = tgt;
742
743 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
744
745 rc = bnx2fc_init_mp_req(io_req);
746 if (rc == FAILED) {
747 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
748 kref_put(&io_req->refcount, bnx2fc_cmd_release);
749 goto tmf_err;
750 }
751
752 /* Set TM flags */
753 io_req->io_req_flags = 0;
754 tm_req->tm_flags = tm_flags;
755
756 /* Fill FCP_CMND */
757 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
758 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
759 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len);
760 fcp_cmnd->fc_dl = 0;
761
762 /* Fill FC header */
763 fc_hdr = &(tm_req->req_fc_hdr);
764 sid = tgt->sid;
765 did = rport->port_id;
766 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
767 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
768 FC_FC_SEQ_INIT, 0);
769 /* Obtain exchange id */
770 xid = io_req->xid;
771
772 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
773 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
774 index = xid % BNX2FC_TASKS_PER_PAGE;
775
776 /* Initialize task context for this IO request */
777 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
778 task = &(task_page[index]);
779 bnx2fc_init_mp_task(io_req, task);
780
781 sc_cmd->SCp.ptr = (char *)io_req;
782
783 /* Obtain free SQ entry */
784 spin_lock_bh(&tgt->tgt_lock);
785 bnx2fc_add_2_sq(tgt, xid);
786
787 /* Enqueue the io_req to active_tm_queue */
788 io_req->on_tmf_queue = 1;
789 list_add_tail(&io_req->link, &tgt->active_tm_queue);
790
791 init_completion(&io_req->tm_done);
792 io_req->wait_for_comp = 1;
793
794 /* Ring doorbell */
795 bnx2fc_ring_doorbell(tgt);
796 spin_unlock_bh(&tgt->tgt_lock);
797
798 rc = wait_for_completion_timeout(&io_req->tm_done,
799 BNX2FC_TM_TIMEOUT * HZ);
800 spin_lock_bh(&tgt->tgt_lock);
801
802 io_req->wait_for_comp = 0;
803 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags)))
804 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
805
806 spin_unlock_bh(&tgt->tgt_lock);
807
808 if (!rc) {
809 printk(KERN_ERR PFX "task mgmt command failed...\n");
810 rc = FAILED;
811 } else {
812 printk(KERN_ERR PFX "task mgmt command success...\n");
813 rc = SUCCESS;
814 }
815 tmf_err:
816 return rc;
817 }
818
819 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
820 {
821 struct fc_lport *lport;
822 struct bnx2fc_rport *tgt = io_req->tgt;
823 struct fc_rport *rport = tgt->rport;
824 struct fc_rport_priv *rdata = tgt->rdata;
825 struct bnx2fc_hba *hba;
826 struct fcoe_port *port;
827 struct bnx2fc_cmd *abts_io_req;
828 struct fcoe_task_ctx_entry *task;
829 struct fcoe_task_ctx_entry *task_page;
830 struct fc_frame_header *fc_hdr;
831 struct bnx2fc_mp_req *abts_req;
832 int task_idx, index;
833 u32 sid, did;
834 u16 xid;
835 int rc = SUCCESS;
836 u32 r_a_tov = rdata->r_a_tov;
837
838 /* called with tgt_lock held */
839 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
840
841 port = io_req->port;
842 hba = port->priv;
843 lport = port->lport;
844
845 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
846 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
847 rc = FAILED;
848 goto abts_err;
849 }
850
851 if (rport == NULL) {
852 printk(KERN_ALERT PFX "initiate_abts: rport is NULL\n");
853 rc = FAILED;
854 goto abts_err;
855 }
856
857 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
858 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
859 rc = FAILED;
860 goto abts_err;
861 }
862
863 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
864 if (!abts_io_req) {
865 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
866 rc = FAILED;
867 goto abts_err;
868 }
869
870 /* Initialize rest of io_req fields */
871 abts_io_req->sc_cmd = NULL;
872 abts_io_req->port = port;
873 abts_io_req->tgt = tgt;
874 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
875
876 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
877 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
878
879 /* Fill FC header */
880 fc_hdr = &(abts_req->req_fc_hdr);
881
882 /* Obtain oxid and rxid for the original exchange to be aborted */
883 fc_hdr->fh_ox_id = htons(io_req->xid);
884 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
885
886 sid = tgt->sid;
887 did = rport->port_id;
888
889 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
890 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
891 FC_FC_SEQ_INIT, 0);
892
893 xid = abts_io_req->xid;
894 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
895 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
896 index = xid % BNX2FC_TASKS_PER_PAGE;
897
898 /* Initialize task context for this IO request */
899 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
900 task = &(task_page[index]);
901 bnx2fc_init_mp_task(abts_io_req, task);
902
903 /*
904 * ABTS task is a temporary task that will be cleaned up
905 * irrespective of ABTS response. We need to start the timer
906 * for the original exchange, as the CQE is posted for the original
907 * IO request.
908 *
909 * Timer for ABTS is started only when it is originated by a
910 * TM request. For the ABTS issued as part of ULP timeout,
911 * scsi-ml maintains the timers.
912 */
913
914 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
915 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
916
917 /* Obtain free SQ entry */
918 bnx2fc_add_2_sq(tgt, xid);
919
920 /* Ring doorbell */
921 bnx2fc_ring_doorbell(tgt);
922
923 abts_err:
924 return rc;
925 }
926
927 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
928 {
929 struct fc_lport *lport;
930 struct bnx2fc_rport *tgt = io_req->tgt;
931 struct bnx2fc_hba *hba;
932 struct fcoe_port *port;
933 struct bnx2fc_cmd *cleanup_io_req;
934 struct fcoe_task_ctx_entry *task;
935 struct fcoe_task_ctx_entry *task_page;
936 int task_idx, index;
937 u16 xid, orig_xid;
938 int rc = 0;
939
940 /* ASSUMPTION: called with tgt_lock held */
941 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
942
943 port = io_req->port;
944 hba = port->priv;
945 lport = port->lport;
946
947 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
948 if (!cleanup_io_req) {
949 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
950 rc = -1;
951 goto cleanup_err;
952 }
953
954 /* Initialize rest of io_req fields */
955 cleanup_io_req->sc_cmd = NULL;
956 cleanup_io_req->port = port;
957 cleanup_io_req->tgt = tgt;
958 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
959
960 xid = cleanup_io_req->xid;
961
962 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
963 index = xid % BNX2FC_TASKS_PER_PAGE;
964
965 /* Initialize task context for this IO request */
966 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
967 task = &(task_page[index]);
968 orig_xid = io_req->xid;
969
970 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
971
972 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
973
974 /* Obtain free SQ entry */
975 bnx2fc_add_2_sq(tgt, xid);
976
977 /* Ring doorbell */
978 bnx2fc_ring_doorbell(tgt);
979
980 cleanup_err:
981 return rc;
982 }
983
984 /**
985 * bnx2fc_eh_target_reset: Reset a target
986 *
987 * @sc_cmd: SCSI command
988 *
989 * Set from SCSI host template to send task mgmt command to the target
990 * and wait for the response
991 */
992 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
993 {
994 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
995 }
996
997 /**
998 * bnx2fc_eh_device_reset - Reset a single LUN
999 *
1000 * @sc_cmd: SCSI command
1001 *
1002 * Set from SCSI host template to send task mgmt command to the target
1003 * and wait for the response
1004 */
1005 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1006 {
1007 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1008 }
1009
1010 /**
1011 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1012 * SCSI command
1013 *
1014 * @sc_cmd: SCSI_ML command pointer
1015 *
1016 * SCSI abort request handler
1017 */
1018 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1019 {
1020 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1021 struct fc_rport_libfc_priv *rp = rport->dd_data;
1022 struct bnx2fc_cmd *io_req;
1023 struct fc_lport *lport;
1024 struct bnx2fc_rport *tgt;
1025 int rc = FAILED;
1026
1027
1028 rc = fc_block_scsi_eh(sc_cmd);
1029 if (rc)
1030 return rc;
1031
1032 lport = shost_priv(sc_cmd->device->host);
1033 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1034 printk(KERN_ALERT PFX "eh_abort: link not ready\n");
1035 return rc;
1036 }
1037
1038 tgt = (struct bnx2fc_rport *)&rp[1];
1039
1040 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1041
1042 spin_lock_bh(&tgt->tgt_lock);
1043 io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1044 if (!io_req) {
1045 /* Command might have just completed */
1046 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1047 spin_unlock_bh(&tgt->tgt_lock);
1048 return SUCCESS;
1049 }
1050 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1051 io_req->refcount.refcount.counter);
1052
1053 /* Hold IO request across abort processing */
1054 kref_get(&io_req->refcount);
1055
1056 BUG_ON(tgt != io_req->tgt);
1057
1058 /* Remove the io_req from the active_q. */
1059 /*
1060 * Task Mgmt functions (LUN RESET & TGT RESET) will not
1061 * issue an ABTS on this particular IO req, as the
1062 * io_req is no longer in the active_q.
1063 */
1064 if (tgt->flush_in_prog) {
1065 printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) "
1066 "flush in progress\n", io_req->xid);
1067 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1068 spin_unlock_bh(&tgt->tgt_lock);
1069 return SUCCESS;
1070 }
1071
1072 if (io_req->on_active_queue == 0) {
1073 printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) "
1074 "not on active_q\n", io_req->xid);
1075 /*
1076 * This condition can happen only due to the FW bug,
1077 * where we do not receive cleanup response from
1078 * the FW. Handle this case gracefully by erroring
1079 * back the IO request to SCSI-ml
1080 */
1081 bnx2fc_scsi_done(io_req, DID_ABORT);
1082
1083 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1084 spin_unlock_bh(&tgt->tgt_lock);
1085 return SUCCESS;
1086 }
1087
1088 /*
1089 * Only eh_abort processing will remove the IO from
1090 * active_cmd_q before processing the request. this is
1091 * done to avoid race conditions between IOs aborted
1092 * as part of task management completion and eh_abort
1093 * processing
1094 */
1095 list_del_init(&io_req->link);
1096 io_req->on_active_queue = 0;
1097 /* Move IO req to retire queue */
1098 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1099
1100 init_completion(&io_req->tm_done);
1101 io_req->wait_for_comp = 1;
1102
1103 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
1104 /* Cancel the current timer running on this io_req */
1105 if (cancel_delayed_work(&io_req->timeout_work))
1106 kref_put(&io_req->refcount,
1107 bnx2fc_cmd_release); /* drop timer hold */
1108 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1109 rc = bnx2fc_initiate_abts(io_req);
1110 } else {
1111 printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) "
1112 "already in abts processing\n", io_req->xid);
1113 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1114 spin_unlock_bh(&tgt->tgt_lock);
1115 return SUCCESS;
1116 }
1117 if (rc == FAILED) {
1118 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1119 spin_unlock_bh(&tgt->tgt_lock);
1120 return rc;
1121 }
1122 spin_unlock_bh(&tgt->tgt_lock);
1123
1124 wait_for_completion(&io_req->tm_done);
1125
1126 spin_lock_bh(&tgt->tgt_lock);
1127 io_req->wait_for_comp = 0;
1128 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1129 &io_req->req_flags))) {
1130 /* Let the scsi-ml try to recover this command */
1131 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1132 io_req->xid);
1133 rc = FAILED;
1134 } else {
1135 /*
1136 * We come here even when there was a race condition
1137 * between timeout and abts completion, and abts
1138 * completion happens just in time.
1139 */
1140 BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1141 rc = SUCCESS;
1142 bnx2fc_scsi_done(io_req, DID_ABORT);
1143 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1144 }
1145
1146 /* release the reference taken in eh_abort */
1147 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1148 spin_unlock_bh(&tgt->tgt_lock);
1149 return rc;
1150 }
1151
1152 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1153 struct fcoe_task_ctx_entry *task,
1154 u8 num_rq)
1155 {
1156 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1157 "refcnt = %d, cmd_type = %d\n",
1158 io_req->refcount.refcount.counter, io_req->cmd_type);
1159 bnx2fc_scsi_done(io_req, DID_ERROR);
1160 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1161 }
1162
1163 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1164 struct fcoe_task_ctx_entry *task,
1165 u8 num_rq)
1166 {
1167 u32 r_ctl;
1168 u32 r_a_tov = FC_DEF_R_A_TOV;
1169 u8 issue_rrq = 0;
1170 struct bnx2fc_rport *tgt = io_req->tgt;
1171
1172 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1173 "refcnt = %d, cmd_type = %d\n",
1174 io_req->xid,
1175 io_req->refcount.refcount.counter, io_req->cmd_type);
1176
1177 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1178 &io_req->req_flags)) {
1179 BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1180 " this io\n");
1181 return;
1182 }
1183
1184 /* Do not issue RRQ as this IO is already cleanedup */
1185 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1186 &io_req->req_flags))
1187 goto io_compl;
1188
1189 /*
1190 * For ABTS issued due to SCSI eh_abort_handler, timeout
1191 * values are maintained by scsi-ml itself. Cancel timeout
1192 * in case ABTS issued as part of task management function
1193 * or due to FW error.
1194 */
1195 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1196 if (cancel_delayed_work(&io_req->timeout_work))
1197 kref_put(&io_req->refcount,
1198 bnx2fc_cmd_release); /* drop timer hold */
1199
1200 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
1201
1202 switch (r_ctl) {
1203 case FC_RCTL_BA_ACC:
1204 /*
1205 * Dont release this cmd yet. It will be relesed
1206 * after we get RRQ response
1207 */
1208 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1209 issue_rrq = 1;
1210 break;
1211
1212 case FC_RCTL_BA_RJT:
1213 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1214 break;
1215 default:
1216 printk(KERN_ERR PFX "Unknown ABTS response\n");
1217 break;
1218 }
1219
1220 if (issue_rrq) {
1221 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1222 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1223 }
1224 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1225 bnx2fc_cmd_timer_set(io_req, r_a_tov);
1226
1227 io_compl:
1228 if (io_req->wait_for_comp) {
1229 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1230 &io_req->req_flags))
1231 complete(&io_req->tm_done);
1232 } else {
1233 /*
1234 * We end up here when ABTS is issued as
1235 * in asynchronous context, i.e., as part
1236 * of task management completion, or
1237 * when FW error is received or when the
1238 * ABTS is issued when the IO is timed
1239 * out.
1240 */
1241
1242 if (io_req->on_active_queue) {
1243 list_del_init(&io_req->link);
1244 io_req->on_active_queue = 0;
1245 /* Move IO req to retire queue */
1246 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1247 }
1248 bnx2fc_scsi_done(io_req, DID_ERROR);
1249 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1250 }
1251 }
1252
1253 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1254 {
1255 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1256 struct bnx2fc_rport *tgt = io_req->tgt;
1257 struct list_head *list;
1258 struct list_head *tmp;
1259 struct bnx2fc_cmd *cmd;
1260 int tm_lun = sc_cmd->device->lun;
1261 int rc = 0;
1262 int lun;
1263
1264 /* called with tgt_lock held */
1265 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1266 /*
1267 * Walk thru the active_ios queue and ABORT the IO
1268 * that matches with the LUN that was reset
1269 */
1270 list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
1271 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
1272 cmd = (struct bnx2fc_cmd *)list;
1273 lun = cmd->sc_cmd->device->lun;
1274 if (lun == tm_lun) {
1275 /* Initiate ABTS on this cmd */
1276 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1277 &cmd->req_flags)) {
1278 /* cancel the IO timeout */
1279 if (cancel_delayed_work(&io_req->timeout_work))
1280 kref_put(&io_req->refcount,
1281 bnx2fc_cmd_release);
1282 /* timer hold */
1283 rc = bnx2fc_initiate_abts(cmd);
1284 /* abts shouldn't fail in this context */
1285 WARN_ON(rc != SUCCESS);
1286 } else
1287 printk(KERN_ERR PFX "lun_rst: abts already in"
1288 " progress for this IO 0x%x\n",
1289 cmd->xid);
1290 }
1291 }
1292 }
1293
1294 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1295 {
1296 struct bnx2fc_rport *tgt = io_req->tgt;
1297 struct list_head *list;
1298 struct list_head *tmp;
1299 struct bnx2fc_cmd *cmd;
1300 int rc = 0;
1301
1302 /* called with tgt_lock held */
1303 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1304 /*
1305 * Walk thru the active_ios queue and ABORT the IO
1306 * that matches with the LUN that was reset
1307 */
1308 list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
1309 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
1310 cmd = (struct bnx2fc_cmd *)list;
1311 /* Initiate ABTS */
1312 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1313 &cmd->req_flags)) {
1314 /* cancel the IO timeout */
1315 if (cancel_delayed_work(&io_req->timeout_work))
1316 kref_put(&io_req->refcount,
1317 bnx2fc_cmd_release); /* timer hold */
1318 rc = bnx2fc_initiate_abts(cmd);
1319 /* abts shouldn't fail in this context */
1320 WARN_ON(rc != SUCCESS);
1321
1322 } else
1323 printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1324 " for this IO 0x%x\n", cmd->xid);
1325 }
1326 }
1327
1328 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1329 struct fcoe_task_ctx_entry *task, u8 num_rq)
1330 {
1331 struct bnx2fc_mp_req *tm_req;
1332 struct fc_frame_header *fc_hdr;
1333 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1334 u64 *hdr;
1335 u64 *temp_hdr;
1336 void *rsp_buf;
1337
1338 /* Called with tgt_lock held */
1339 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1340
1341 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1342 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1343 else {
1344 /* TM has already timed out and we got
1345 * delayed completion. Ignore completion
1346 * processing.
1347 */
1348 return;
1349 }
1350
1351 tm_req = &(io_req->mp_req);
1352 fc_hdr = &(tm_req->resp_fc_hdr);
1353 hdr = (u64 *)fc_hdr;
1354 temp_hdr = (u64 *)
1355 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
1356 hdr[0] = cpu_to_be64(temp_hdr[0]);
1357 hdr[1] = cpu_to_be64(temp_hdr[1]);
1358 hdr[2] = cpu_to_be64(temp_hdr[2]);
1359
1360 tm_req->resp_len =
1361 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
1362
1363 rsp_buf = tm_req->resp_buf;
1364
1365 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1366 bnx2fc_parse_fcp_rsp(io_req,
1367 (struct fcoe_fcp_rsp_payload *)
1368 rsp_buf, num_rq);
1369 if (io_req->fcp_rsp_code == 0) {
1370 /* TM successful */
1371 if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1372 bnx2fc_lun_reset_cmpl(io_req);
1373 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1374 bnx2fc_tgt_reset_cmpl(io_req);
1375 }
1376 } else {
1377 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1378 fc_hdr->fh_r_ctl);
1379 }
1380 if (!sc_cmd->SCp.ptr) {
1381 printk(KERN_ALERT PFX "tm_compl: SCp.ptr is NULL\n");
1382 return;
1383 }
1384 switch (io_req->fcp_status) {
1385 case FC_GOOD:
1386 if (io_req->cdb_status == 0) {
1387 /* Good IO completion */
1388 sc_cmd->result = DID_OK << 16;
1389 } else {
1390 /* Transport status is good, SCSI status not good */
1391 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1392 }
1393 if (io_req->fcp_resid)
1394 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1395 break;
1396
1397 default:
1398 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1399 io_req->fcp_status);
1400 break;
1401 }
1402
1403 sc_cmd = io_req->sc_cmd;
1404 io_req->sc_cmd = NULL;
1405
1406 /* check if the io_req exists in tgt's tmf_q */
1407 if (io_req->on_tmf_queue) {
1408
1409 list_del_init(&io_req->link);
1410 io_req->on_tmf_queue = 0;
1411 } else {
1412
1413 printk(KERN_ALERT PFX "Command not on active_cmd_queue!\n");
1414 return;
1415 }
1416
1417 sc_cmd->SCp.ptr = NULL;
1418 sc_cmd->scsi_done(sc_cmd);
1419
1420 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1421 if (io_req->wait_for_comp) {
1422 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1423 complete(&io_req->tm_done);
1424 }
1425 }
1426
1427 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1428 int bd_index)
1429 {
1430 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1431 int frag_size, sg_frags;
1432
1433 sg_frags = 0;
1434 while (sg_len) {
1435 if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1436 frag_size = BNX2FC_BD_SPLIT_SZ;
1437 else
1438 frag_size = sg_len;
1439 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1440 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;
1441 bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1442 bd[bd_index + sg_frags].flags = 0;
1443
1444 addr += (u64) frag_size;
1445 sg_frags++;
1446 sg_len -= frag_size;
1447 }
1448 return sg_frags;
1449
1450 }
1451
1452 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1453 {
1454 struct scsi_cmnd *sc = io_req->sc_cmd;
1455 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1456 struct scatterlist *sg;
1457 int byte_count = 0;
1458 int sg_count = 0;
1459 int bd_count = 0;
1460 int sg_frags;
1461 unsigned int sg_len;
1462 u64 addr;
1463 int i;
1464
1465 sg_count = scsi_dma_map(sc);
1466 scsi_for_each_sg(sc, sg, sg_count, i) {
1467 sg_len = sg_dma_len(sg);
1468 addr = sg_dma_address(sg);
1469 if (sg_len > BNX2FC_MAX_BD_LEN) {
1470 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1471 bd_count);
1472 } else {
1473
1474 sg_frags = 1;
1475 bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1476 bd[bd_count].buf_addr_hi = addr >> 32;
1477 bd[bd_count].buf_len = (u16)sg_len;
1478 bd[bd_count].flags = 0;
1479 }
1480 bd_count += sg_frags;
1481 byte_count += sg_len;
1482 }
1483 if (byte_count != scsi_bufflen(sc))
1484 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1485 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1486 io_req->xid);
1487 return bd_count;
1488 }
1489
1490 static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
1491 {
1492 struct scsi_cmnd *sc = io_req->sc_cmd;
1493 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1494 int bd_count;
1495
1496 if (scsi_sg_count(sc))
1497 bd_count = bnx2fc_map_sg(io_req);
1498 else {
1499 bd_count = 0;
1500 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1501 bd[0].buf_len = bd[0].flags = 0;
1502 }
1503 io_req->bd_tbl->bd_valid = bd_count;
1504 }
1505
1506 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1507 {
1508 struct scsi_cmnd *sc = io_req->sc_cmd;
1509
1510 if (io_req->bd_tbl->bd_valid && sc) {
1511 scsi_dma_unmap(sc);
1512 io_req->bd_tbl->bd_valid = 0;
1513 }
1514 }
1515
1516 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1517 struct fcp_cmnd *fcp_cmnd)
1518 {
1519 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1520 char tag[2];
1521
1522 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1523
1524 int_to_scsilun(sc_cmd->device->lun,
1525 (struct scsi_lun *) fcp_cmnd->fc_lun);
1526
1527
1528 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1529 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1530
1531 fcp_cmnd->fc_cmdref = 0;
1532 fcp_cmnd->fc_pri_ta = 0;
1533 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1534 fcp_cmnd->fc_flags = io_req->io_req_flags;
1535
1536 if (scsi_populate_tag_msg(sc_cmd, tag)) {
1537 switch (tag[0]) {
1538 case HEAD_OF_QUEUE_TAG:
1539 fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ;
1540 break;
1541 case ORDERED_QUEUE_TAG:
1542 fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED;
1543 break;
1544 default:
1545 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1546 break;
1547 }
1548 } else {
1549 fcp_cmnd->fc_pri_ta = 0;
1550 }
1551 }
1552
1553 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1554 struct fcoe_fcp_rsp_payload *fcp_rsp,
1555 u8 num_rq)
1556 {
1557 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1558 struct bnx2fc_rport *tgt = io_req->tgt;
1559 u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1560 u32 rq_buff_len = 0;
1561 int i;
1562 unsigned char *rq_data;
1563 unsigned char *dummy;
1564 int fcp_sns_len = 0;
1565 int fcp_rsp_len = 0;
1566
1567 io_req->fcp_status = FC_GOOD;
1568 io_req->fcp_resid = fcp_rsp->fcp_resid;
1569
1570 io_req->scsi_comp_flags = rsp_flags;
1571 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1572 fcp_rsp->scsi_status_code;
1573
1574 /* Fetch fcp_rsp_info and fcp_sns_info if available */
1575 if (num_rq) {
1576
1577 /*
1578 * We do not anticipate num_rq >1, as the linux defined
1579 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1580 * 256 bytes of single rq buffer is good enough to hold this.
1581 */
1582
1583 if (rsp_flags &
1584 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1585 fcp_rsp_len = rq_buff_len
1586 = fcp_rsp->fcp_rsp_len;
1587 }
1588
1589 if (rsp_flags &
1590 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1591 fcp_sns_len = fcp_rsp->fcp_sns_len;
1592 rq_buff_len += fcp_rsp->fcp_sns_len;
1593 }
1594
1595 io_req->fcp_rsp_len = fcp_rsp_len;
1596 io_req->fcp_sns_len = fcp_sns_len;
1597
1598 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1599 /* Invalid sense sense length. */
1600 printk(KERN_ALERT PFX "invalid sns length %d\n",
1601 rq_buff_len);
1602 /* reset rq_buff_len */
1603 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;
1604 }
1605
1606 rq_data = bnx2fc_get_next_rqe(tgt, 1);
1607
1608 if (num_rq > 1) {
1609 /* We do not need extra sense data */
1610 for (i = 1; i < num_rq; i++)
1611 dummy = bnx2fc_get_next_rqe(tgt, 1);
1612 }
1613
1614 /* fetch fcp_rsp_code */
1615 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1616 /* Only for task management function */
1617 io_req->fcp_rsp_code = rq_data[3];
1618 printk(KERN_ERR PFX "fcp_rsp_code = %d\n",
1619 io_req->fcp_rsp_code);
1620 }
1621
1622 /* fetch sense data */
1623 rq_data += fcp_rsp_len;
1624
1625 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1626 printk(KERN_ERR PFX "Truncating sense buffer\n");
1627 fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1628 }
1629
1630 memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer));
1631 if (fcp_sns_len)
1632 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1633
1634 /* return RQ entries */
1635 for (i = 0; i < num_rq; i++)
1636 bnx2fc_return_rqe(tgt, 1);
1637 }
1638 }
1639
1640 /**
1641 * bnx2fc_queuecommand - Queuecommand function of the scsi template
1642 *
1643 * @host: The Scsi_Host the command was issued to
1644 * @sc_cmd: struct scsi_cmnd to be executed
1645 *
1646 * This is the IO strategy routine, called by SCSI-ML
1647 **/
1648 int bnx2fc_queuecommand(struct Scsi_Host *host,
1649 struct scsi_cmnd *sc_cmd)
1650 {
1651 struct fc_lport *lport = shost_priv(host);
1652 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1653 struct fc_rport_libfc_priv *rp = rport->dd_data;
1654 struct bnx2fc_rport *tgt;
1655 struct bnx2fc_cmd *io_req;
1656 int rc = 0;
1657 int rval;
1658
1659 rval = fc_remote_port_chkready(rport);
1660 if (rval) {
1661 sc_cmd->result = rval;
1662 sc_cmd->scsi_done(sc_cmd);
1663 return 0;
1664 }
1665
1666 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1667 rc = SCSI_MLQUEUE_HOST_BUSY;
1668 goto exit_qcmd;
1669 }
1670
1671 /* rport and tgt are allocated together, so tgt should be non-NULL */
1672 tgt = (struct bnx2fc_rport *)&rp[1];
1673
1674 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1675 if (test_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags)) {
1676 sc_cmd->result = DID_NO_CONNECT << 16;
1677 sc_cmd->scsi_done(sc_cmd);
1678 return 0;
1679
1680 }
1681 /*
1682 * Session is not offloaded yet. Let SCSI-ml retry
1683 * the command.
1684 */
1685 rc = SCSI_MLQUEUE_TARGET_BUSY;
1686 goto exit_qcmd;
1687 }
1688
1689 io_req = bnx2fc_cmd_alloc(tgt);
1690 if (!io_req) {
1691 rc = SCSI_MLQUEUE_HOST_BUSY;
1692 goto exit_qcmd;
1693 }
1694 io_req->sc_cmd = sc_cmd;
1695
1696 if (bnx2fc_post_io_req(tgt, io_req)) {
1697 printk(KERN_ERR PFX "Unable to post io_req\n");
1698 rc = SCSI_MLQUEUE_HOST_BUSY;
1699 goto exit_qcmd;
1700 }
1701 exit_qcmd:
1702 return rc;
1703 }
1704
1705 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1706 struct fcoe_task_ctx_entry *task,
1707 u8 num_rq)
1708 {
1709 struct fcoe_fcp_rsp_payload *fcp_rsp;
1710 struct bnx2fc_rport *tgt = io_req->tgt;
1711 struct scsi_cmnd *sc_cmd;
1712 struct Scsi_Host *host;
1713
1714
1715 /* scsi_cmd_cmpl is called with tgt lock held */
1716
1717 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1718 /* we will not receive ABTS response for this IO */
1719 BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1720 "this scsi cmd\n");
1721 }
1722
1723 /* Cancel the timeout_work, as we received IO completion */
1724 if (cancel_delayed_work(&io_req->timeout_work))
1725 kref_put(&io_req->refcount,
1726 bnx2fc_cmd_release); /* drop timer hold */
1727
1728 sc_cmd = io_req->sc_cmd;
1729 if (sc_cmd == NULL) {
1730 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1731 return;
1732 }
1733
1734 /* Fetch fcp_rsp from task context and perform cmd completion */
1735 fcp_rsp = (struct fcoe_fcp_rsp_payload *)
1736 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
1737
1738 /* parse fcp_rsp and obtain sense data from RQ if available */
1739 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
1740
1741 host = sc_cmd->device->host;
1742 if (!sc_cmd->SCp.ptr) {
1743 printk(KERN_ERR PFX "SCp.ptr is NULL\n");
1744 return;
1745 }
1746
1747 if (io_req->on_active_queue) {
1748 list_del_init(&io_req->link);
1749 io_req->on_active_queue = 0;
1750 /* Move IO req to retire queue */
1751 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1752 } else {
1753 /* This should not happen, but could have been pulled
1754 * by bnx2fc_flush_active_ios(), or during a race
1755 * between command abort and (late) completion.
1756 */
1757 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
1758 if (io_req->wait_for_comp)
1759 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1760 &io_req->req_flags))
1761 complete(&io_req->tm_done);
1762 }
1763
1764 bnx2fc_unmap_sg_list(io_req);
1765 io_req->sc_cmd = NULL;
1766
1767 switch (io_req->fcp_status) {
1768 case FC_GOOD:
1769 if (io_req->cdb_status == 0) {
1770 /* Good IO completion */
1771 sc_cmd->result = DID_OK << 16;
1772 } else {
1773 /* Transport status is good, SCSI status not good */
1774 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1775 " fcp_resid = 0x%x\n",
1776 io_req->cdb_status, io_req->fcp_resid);
1777 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1778 }
1779 if (io_req->fcp_resid)
1780 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1781 break;
1782 default:
1783 printk(KERN_ALERT PFX "scsi_cmd_compl: fcp_status = %d\n",
1784 io_req->fcp_status);
1785 break;
1786 }
1787 sc_cmd->SCp.ptr = NULL;
1788 sc_cmd->scsi_done(sc_cmd);
1789 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1790 }
1791
1792 static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
1793 struct bnx2fc_cmd *io_req)
1794 {
1795 struct fcoe_task_ctx_entry *task;
1796 struct fcoe_task_ctx_entry *task_page;
1797 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1798 struct fcoe_port *port = tgt->port;
1799 struct bnx2fc_hba *hba = port->priv;
1800 struct fc_lport *lport = port->lport;
1801 struct fcoe_dev_stats *stats;
1802 int task_idx, index;
1803 u16 xid;
1804
1805 /* Initialize rest of io_req fields */
1806 io_req->cmd_type = BNX2FC_SCSI_CMD;
1807 io_req->port = port;
1808 io_req->tgt = tgt;
1809 io_req->data_xfer_len = scsi_bufflen(sc_cmd);
1810 sc_cmd->SCp.ptr = (char *)io_req;
1811
1812 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1813 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
1814 io_req->io_req_flags = BNX2FC_READ;
1815 stats->InputRequests++;
1816 stats->InputBytes += io_req->data_xfer_len;
1817 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
1818 io_req->io_req_flags = BNX2FC_WRITE;
1819 stats->OutputRequests++;
1820 stats->OutputBytes += io_req->data_xfer_len;
1821 } else {
1822 io_req->io_req_flags = 0;
1823 stats->ControlRequests++;
1824 }
1825 put_cpu();
1826
1827 xid = io_req->xid;
1828
1829 /* Build buffer descriptor list for firmware from sg list */
1830 bnx2fc_build_bd_list_from_sg(io_req);
1831
1832 task_idx = xid / BNX2FC_TASKS_PER_PAGE;
1833 index = xid % BNX2FC_TASKS_PER_PAGE;
1834
1835 /* Initialize task context for this IO request */
1836 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
1837 task = &(task_page[index]);
1838 bnx2fc_init_task(io_req, task);
1839
1840 spin_lock_bh(&tgt->tgt_lock);
1841
1842 if (tgt->flush_in_prog) {
1843 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
1844 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1845 spin_unlock_bh(&tgt->tgt_lock);
1846 return -EAGAIN;
1847 }
1848
1849 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1850 printk(KERN_ERR PFX "Session not ready...post_io\n");
1851 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1852 spin_unlock_bh(&tgt->tgt_lock);
1853 return -EAGAIN;
1854 }
1855
1856 /* Time IO req */
1857 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
1858 /* Obtain free SQ entry */
1859 bnx2fc_add_2_sq(tgt, xid);
1860
1861 /* Enqueue the io_req to active_cmd_queue */
1862
1863 io_req->on_active_queue = 1;
1864 /* move io_req from pending_queue to active_queue */
1865 list_add_tail(&io_req->link, &tgt->active_cmd_queue);
1866
1867 /* Ring doorbell */
1868 bnx2fc_ring_doorbell(tgt);
1869 spin_unlock_bh(&tgt->tgt_lock);
1870 return 0;
1871 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree