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Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[linux-2.6-block.git] / drivers / scsi / bnx2fc / bnx2fc_io.c
CommitLineData
853e2bd2
BG		 1/* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver.
2 * IO manager and SCSI IO processing.
3 *
9b35baae 4 * Copyright (c) 2008 - 2011 Broadcom Corporation
853e2bd2
BG		 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"
0ea5c275
BG		 14
15#define RESERVE_FREE_LIST_INDEX num_possible_cpus()
16
853e2bd2
BG		 17static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
18 int bd_index);
19static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
822f2903 20static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
853e2bd2
BG		 21static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
22static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
23static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
24 struct fcoe_fcp_rsp_payload *fcp_rsp,
25 u8 num_rq);
26
27void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
28 unsigned int timer_msec)
29{
aea71a02 30 struct bnx2fc_interface *interface = io_req->port->priv;
853e2bd2 31
aea71a02
BPG		 32 if (queue_delayed_work(interface->timer_work_queue,
33 &io_req->timeout_work,
34 msecs_to_jiffies(timer_msec)))
853e2bd2
BG		 35 kref_get(&io_req->refcount);
36}
37
38static void bnx2fc_cmd_timeout(struct work_struct *work)
39{
40 struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,
41 timeout_work.work);
42 struct fc_lport *lport;
43 struct fc_rport_priv *rdata;
44 u8 cmd_type = io_req->cmd_type;
45 struct bnx2fc_rport *tgt = io_req->tgt;
46 int logo_issued;
47 int rc;
48
49 BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"
50 "req_flags = %lx\n", cmd_type, io_req->req_flags);
51
52 spin_lock_bh(&tgt->tgt_lock);
53 if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {
54 clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
55 /*
56 * ideally we should hold the io_req until RRQ complets,
57 * and release io_req from timeout hold.
58 */
59 spin_unlock_bh(&tgt->tgt_lock);
60 bnx2fc_send_rrq(io_req);
61 return;
62 }
63 if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {
64 BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");
65 goto done;
66 }
67
68 switch (cmd_type) {
69 case BNX2FC_SCSI_CMD:
70 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
71 &io_req->req_flags)) {
72 /* Handle eh_abort timeout */
73 BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");
74 complete(&io_req->tm_done);
75 } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,
76 &io_req->req_flags)) {
77 /* Handle internally generated ABTS timeout */
78 BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",
79 io_req->refcount.refcount.counter);
80 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
81 &io_req->req_flags))) {
82
83 lport = io_req->port->lport;
84 rdata = io_req->tgt->rdata;
85 logo_issued = test_and_set_bit(
86 BNX2FC_FLAG_EXPL_LOGO,
87 &tgt->flags);
88 kref_put(&io_req->refcount, bnx2fc_cmd_release);
89 spin_unlock_bh(&tgt->tgt_lock);
90
91 /* Explicitly logo the target */
92 if (!logo_issued) {
93 BNX2FC_IO_DBG(io_req, "Explicit "
94 "logo - tgt flags = 0x%lx\n",
95 tgt->flags);
96
97 mutex_lock(&lport->disc.disc_mutex);
98 lport->tt.rport_logoff(rdata);
99 mutex_unlock(&lport->disc.disc_mutex);
100 }
101 return;
102 }
103 } else {
104 /* Hanlde IO timeout */
105 BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");
106 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,
107 &io_req->req_flags)) {
108 BNX2FC_IO_DBG(io_req, "IO completed before "
109 " timer expiry\n");
110 goto done;
111 }
112
113 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
114 &io_req->req_flags)) {
115 rc = bnx2fc_initiate_abts(io_req);
116 if (rc == SUCCESS)
117 goto done;
118 /*
119 * Explicitly logo the target if
120 * abts initiation fails
121 */
122 lport = io_req->port->lport;
123 rdata = io_req->tgt->rdata;
124 logo_issued = test_and_set_bit(
125 BNX2FC_FLAG_EXPL_LOGO,
126 &tgt->flags);
127 kref_put(&io_req->refcount, bnx2fc_cmd_release);
128 spin_unlock_bh(&tgt->tgt_lock);
129
130 if (!logo_issued) {
131 BNX2FC_IO_DBG(io_req, "Explicit "
132 "logo - tgt flags = 0x%lx\n",
133 tgt->flags);
134
135
136 mutex_lock(&lport->disc.disc_mutex);
137 lport->tt.rport_logoff(rdata);
138 mutex_unlock(&lport->disc.disc_mutex);
139 }
140 return;
141 } else {
142 BNX2FC_IO_DBG(io_req, "IO already in "
143 "ABTS processing\n");
144 }
145 }
146 break;
147 case BNX2FC_ELS:
148
149 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
150 BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");
151
152 if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
153 &io_req->req_flags)) {
154 lport = io_req->port->lport;
155 rdata = io_req->tgt->rdata;
156 logo_issued = test_and_set_bit(
157 BNX2FC_FLAG_EXPL_LOGO,
158 &tgt->flags);
159 kref_put(&io_req->refcount, bnx2fc_cmd_release);
160 spin_unlock_bh(&tgt->tgt_lock);
161
162 /* Explicitly logo the target */
163 if (!logo_issued) {
164 BNX2FC_IO_DBG(io_req, "Explicitly logo"
165 "(els)\n");
166 mutex_lock(&lport->disc.disc_mutex);
167 lport->tt.rport_logoff(rdata);
168 mutex_unlock(&lport->disc.disc_mutex);
169 }
170 return;
171 }
172 } else {
173 /*
174 * Handle ELS timeout.
175 * tgt_lock is used to sync compl path and timeout
176 * path. If els compl path is processing this IO, we
177 * have nothing to do here, just release the timer hold
178 */
179 BNX2FC_IO_DBG(io_req, "ELS timed out\n");
180 if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
181 &io_req->req_flags))
182 goto done;
183
184 /* Indicate the cb_func that this ELS is timed out */
185 set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);
186
187 if ((io_req->cb_func) && (io_req->cb_arg)) {
188 io_req->cb_func(io_req->cb_arg);
189 io_req->cb_arg = NULL;
190 }
191 }
192 break;
193 default:
194 printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",
195 cmd_type);
196 break;
197 }
198
199done:
200 /* release the cmd that was held when timer was set */
201 kref_put(&io_req->refcount, bnx2fc_cmd_release);
202 spin_unlock_bh(&tgt->tgt_lock);
203}
204
205static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
206{
207 /* Called with host lock held */
208 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
209
210 /*
211 * active_cmd_queue may have other command types as well,
212 * and during flush operation, we want to error back only
213 * scsi commands.
214 */
215 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
216 return;
217
218 BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
74446954
BPG		 219 if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {
220 /* Do not call scsi done for this IO */
221 return;
222 }
223
853e2bd2
BG		 224 bnx2fc_unmap_sg_list(io_req);
225 io_req->sc_cmd = NULL;
226 if (!sc_cmd) {
227 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
228 "IO(0x%x) already cleaned up\n",
229 io_req->xid);
230 return;
231 }
232 sc_cmd->result = err_code << 16;
233
234 BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
235 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
236 sc_cmd->allowed);
237 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
238 sc_cmd->SCp.ptr = NULL;
239 sc_cmd->scsi_done(sc_cmd);
240}
241
242struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
243 u16 min_xid, u16 max_xid)
244{
245 struct bnx2fc_cmd_mgr *cmgr;
246 struct io_bdt *bdt_info;
247 struct bnx2fc_cmd *io_req;
248 size_t len;
249 u32 mem_size;
250 u16 xid;
251 int i;
0ea5c275 252 int num_ios, num_pri_ios;
853e2bd2 253 size_t bd_tbl_sz;
0ea5c275 254 int arr_sz = num_possible_cpus() + 1;
853e2bd2
BG		 255
256 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
257 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
258 and max_xid 0x%x\n", min_xid, max_xid);
259 return NULL;
260 }
261 BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
262
263 num_ios = max_xid - min_xid + 1;
264 len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
265 len += sizeof(struct bnx2fc_cmd_mgr);
266
267 cmgr = kzalloc(len, GFP_KERNEL);
268 if (!cmgr) {
269 printk(KERN_ERR PFX "failed to alloc cmgr\n");
270 return NULL;
271 }
272
273 cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
0ea5c275 274 arr_sz, GFP_KERNEL);
853e2bd2
BG		 275 if (!cmgr->free_list) {
276 printk(KERN_ERR PFX "failed to alloc free_list\n");
277 goto mem_err;
278 }
279
280 cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
0ea5c275 281 arr_sz, GFP_KERNEL);
853e2bd2
BG		 282 if (!cmgr->free_list_lock) {
283 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
284 goto mem_err;
285 }
286
287 cmgr->hba = hba;
288 cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
289
0ea5c275 290 for (i = 0; i < arr_sz; i++) {
853e2bd2
BG		 291 INIT_LIST_HEAD(&cmgr->free_list[i]);
292 spin_lock_init(&cmgr->free_list_lock[i]);
293 }
294
0ea5c275
BG		 295 /*
296 * Pre-allocated pool of bnx2fc_cmds.
297 * Last entry in the free list array is the free list
298 * of slow path requests.
299 */
853e2bd2 300 xid = BNX2FC_MIN_XID;
0ea5c275 301 num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS;
853e2bd2
BG		 302 for (i = 0; i < num_ios; i++) {
303 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
304
305 if (!io_req) {
306 printk(KERN_ERR PFX "failed to alloc io_req\n");
307 goto mem_err;
308 }
309
310 INIT_LIST_HEAD(&io_req->link);
311 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
312
313 io_req->xid = xid++;
0ea5c275
BG		 314 if (i < num_pri_ios)
315 list_add_tail(&io_req->link,
316 &cmgr->free_list[io_req->xid %
317 num_possible_cpus()]);
318 else
319 list_add_tail(&io_req->link,
320 &cmgr->free_list[num_possible_cpus()]);
853e2bd2
BG		 321 io_req++;
322 }
323
324 /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
325 mem_size = num_ios * sizeof(struct io_bdt *);
326 cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL);
327 if (!cmgr->io_bdt_pool) {
328 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
329 goto mem_err;
330 }
331
332 mem_size = sizeof(struct io_bdt);
333 for (i = 0; i < num_ios; i++) {
334 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
335 if (!cmgr->io_bdt_pool[i]) {
336 printk(KERN_ERR PFX "failed to alloc "
337 "io_bdt_pool[%d]\n", i);
338 goto mem_err;
339 }
340 }
341
342 /* Allocate an map fcoe_bdt_ctx structures */
343 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
344 for (i = 0; i < num_ios; i++) {
345 bdt_info = cmgr->io_bdt_pool[i];
346 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
347 bd_tbl_sz,
348 &bdt_info->bd_tbl_dma,
349 GFP_KERNEL);
350 if (!bdt_info->bd_tbl) {
351 printk(KERN_ERR PFX "failed to alloc "
352 "bdt_tbl[%d]\n", i);
353 goto mem_err;
354 }
355 }
356
357 return cmgr;
358
359mem_err:
360 bnx2fc_cmd_mgr_free(cmgr);
361 return NULL;
362}
363
364void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
365{
366 struct io_bdt *bdt_info;
367 struct bnx2fc_hba *hba = cmgr->hba;
368 size_t bd_tbl_sz;
369 u16 min_xid = BNX2FC_MIN_XID;
370 u16 max_xid = BNX2FC_MAX_XID;
371 int num_ios;
372 int i;
373
374 num_ios = max_xid - min_xid + 1;
375
376 /* Free fcoe_bdt_ctx structures */
377 if (!cmgr->io_bdt_pool)
378 goto free_cmd_pool;
379
380 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
381 for (i = 0; i < num_ios; i++) {
382 bdt_info = cmgr->io_bdt_pool[i];
383 if (bdt_info->bd_tbl) {
384 dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
385 bdt_info->bd_tbl,
386 bdt_info->bd_tbl_dma);
387 bdt_info->bd_tbl = NULL;
388 }
389 }
390
391 /* Destroy io_bdt pool */
392 for (i = 0; i < num_ios; i++) {
393 kfree(cmgr->io_bdt_pool[i]);
394 cmgr->io_bdt_pool[i] = NULL;
395 }
396
397 kfree(cmgr->io_bdt_pool);
398 cmgr->io_bdt_pool = NULL;
399
400free_cmd_pool:
401 kfree(cmgr->free_list_lock);
402
403 /* Destroy cmd pool */
404 if (!cmgr->free_list)
405 goto free_cmgr;
406
0ea5c275 407 for (i = 0; i < num_possible_cpus() + 1; i++) {
d71fb3bd 408 struct bnx2fc_cmd *tmp, *io_req;
853e2bd2 409
d71fb3bd
BPG		 410 list_for_each_entry_safe(io_req, tmp,
411 &cmgr->free_list[i], link) {
853e2bd2
BG		 412 list_del(&io_req->link);
413 kfree(io_req);
414 }
415 }
416 kfree(cmgr->free_list);
417free_cmgr:
418 /* Free command manager itself */
419 kfree(cmgr);
420}
421
422struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
423{
424 struct fcoe_port *port = tgt->port;
aea71a02
BPG		 425 struct bnx2fc_interface *interface = port->priv;
426 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
853e2bd2
BG		 427 struct bnx2fc_cmd *io_req;
428 struct list_head *listp;
429 struct io_bdt *bd_tbl;
0ea5c275 430 int index = RESERVE_FREE_LIST_INDEX;
619c5cb6 431 u32 free_sqes;
853e2bd2
BG		 432 u32 max_sqes;
433 u16 xid;
434
435 max_sqes = tgt->max_sqes;
436 switch (type) {
437 case BNX2FC_TASK_MGMT_CMD:
438 max_sqes = BNX2FC_TM_MAX_SQES;
439 break;
440 case BNX2FC_ELS:
441 max_sqes = BNX2FC_ELS_MAX_SQES;
442 break;
443 default:
444 break;
445 }
446
447 /*
448 * NOTE: Free list insertions and deletions are protected with
449 * cmgr lock
450 */
0ea5c275 451 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
619c5cb6 452 free_sqes = atomic_read(&tgt->free_sqes);
0ea5c275 453 if ((list_empty(&(cmd_mgr->free_list[index]))) ||
619c5cb6
VZ		 454 (tgt->num_active_ios.counter >= max_sqes) ||
455 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
853e2bd2
BG		 456 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
457 "ios(%d):sqes(%d)\n",
458 tgt->num_active_ios.counter, tgt->max_sqes);
0ea5c275 459 if (list_empty(&(cmd_mgr->free_list[index])))
853e2bd2 460 printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
0ea5c275 461 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
853e2bd2
BG		 462 return NULL;
463 }
464
465 listp = (struct list_head *)
0ea5c275 466 cmd_mgr->free_list[index].next;
853e2bd2
BG		 467 list_del_init(listp);
468 io_req = (struct bnx2fc_cmd *) listp;
469 xid = io_req->xid;
470 cmd_mgr->cmds[xid] = io_req;
471 atomic_inc(&tgt->num_active_ios);
619c5cb6 472 atomic_dec(&tgt->free_sqes);
0ea5c275 473 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
853e2bd2
BG		 474
475 INIT_LIST_HEAD(&io_req->link);
476
477 io_req->port = port;
478 io_req->cmd_mgr = cmd_mgr;
479 io_req->req_flags = 0;
480 io_req->cmd_type = type;
481
482 /* Bind io_bdt for this io_req */
483 /* Have a static link between io_req and io_bdt_pool */
484 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
485 bd_tbl->io_req = io_req;
486
487 /* Hold the io_req against deletion */
488 kref_init(&io_req->refcount);
489 return io_req;
490}
aea71a02
BPG		 491
492struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
853e2bd2
BG		 493{
494 struct fcoe_port *port = tgt->port;
aea71a02
BPG		 495 struct bnx2fc_interface *interface = port->priv;
496 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
853e2bd2
BG		 497 struct bnx2fc_cmd *io_req;
498 struct list_head *listp;
499 struct io_bdt *bd_tbl;
619c5cb6 500 u32 free_sqes;
853e2bd2
BG		 501 u32 max_sqes;
502 u16 xid;
0ea5c275 503 int index = get_cpu();
853e2bd2
BG		 504
505 max_sqes = BNX2FC_SCSI_MAX_SQES;
506 /*
507 * NOTE: Free list insertions and deletions are protected with
508 * cmgr lock
509 */
0ea5c275 510 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
619c5cb6 511 free_sqes = atomic_read(&tgt->free_sqes);
0ea5c275 512 if ((list_empty(&cmd_mgr->free_list[index])) ||
619c5cb6
VZ		 513 (tgt->num_active_ios.counter >= max_sqes) ||
514 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
0ea5c275
BG		 515 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
516 put_cpu();
853e2bd2
BG		 517 return NULL;
518 }
519
520 listp = (struct list_head *)
0ea5c275 521 cmd_mgr->free_list[index].next;
853e2bd2
BG		 522 list_del_init(listp);
523 io_req = (struct bnx2fc_cmd *) listp;
524 xid = io_req->xid;
525 cmd_mgr->cmds[xid] = io_req;
526 atomic_inc(&tgt->num_active_ios);
619c5cb6 527 atomic_dec(&tgt->free_sqes);
0ea5c275
BG		 528 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
529 put_cpu();
853e2bd2
BG		 530
531 INIT_LIST_HEAD(&io_req->link);
532
533 io_req->port = port;
534 io_req->cmd_mgr = cmd_mgr;
535 io_req->req_flags = 0;
536
537 /* Bind io_bdt for this io_req */
538 /* Have a static link between io_req and io_bdt_pool */
539 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
540 bd_tbl->io_req = io_req;
541
542 /* Hold the io_req against deletion */
543 kref_init(&io_req->refcount);
544 return io_req;
545}
546
547void bnx2fc_cmd_release(struct kref *ref)
548{
549 struct bnx2fc_cmd *io_req = container_of(ref,
550 struct bnx2fc_cmd, refcount);
551 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
0ea5c275
BG		 552 int index;
553
554 if (io_req->cmd_type == BNX2FC_SCSI_CMD)
555 index = io_req->xid % num_possible_cpus();
556 else
557 index = RESERVE_FREE_LIST_INDEX;
853e2bd2 558
0ea5c275
BG		 559
560 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
853e2bd2
BG		 561 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
562 bnx2fc_free_mp_resc(io_req);
563 cmd_mgr->cmds[io_req->xid] = NULL;
564 /* Delete IO from retire queue */
565 list_del_init(&io_req->link);
566 /* Add it to the free list */
567 list_add(&io_req->link,
0ea5c275 568 &cmd_mgr->free_list[index]);
853e2bd2 569 atomic_dec(&io_req->tgt->num_active_ios);
0ea5c275
BG		 570 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
571
853e2bd2
BG		 572}
573
574static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
575{
576 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
aea71a02
BPG		 577 struct bnx2fc_interface *interface = io_req->port->priv;
578 struct bnx2fc_hba *hba = interface->hba;
853e2bd2
BG		 579 size_t sz = sizeof(struct fcoe_bd_ctx);
580
581 /* clear tm flags */
582 mp_req->tm_flags = 0;
583 if (mp_req->mp_req_bd) {
584 dma_free_coherent(&hba->pcidev->dev, sz,
585 mp_req->mp_req_bd,
586 mp_req->mp_req_bd_dma);
587 mp_req->mp_req_bd = NULL;
588 }
589 if (mp_req->mp_resp_bd) {
590 dma_free_coherent(&hba->pcidev->dev, sz,
591 mp_req->mp_resp_bd,
592 mp_req->mp_resp_bd_dma);
593 mp_req->mp_resp_bd = NULL;
594 }
595 if (mp_req->req_buf) {
596 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
597 mp_req->req_buf,
598 mp_req->req_buf_dma);
599 mp_req->req_buf = NULL;
600 }
601 if (mp_req->resp_buf) {
602 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
603 mp_req->resp_buf,
604 mp_req->resp_buf_dma);
605 mp_req->resp_buf = NULL;
606 }
607}
608
609int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
610{
611 struct bnx2fc_mp_req *mp_req;
612 struct fcoe_bd_ctx *mp_req_bd;
613 struct fcoe_bd_ctx *mp_resp_bd;
aea71a02
BPG		 614 struct bnx2fc_interface *interface = io_req->port->priv;
615 struct bnx2fc_hba *hba = interface->hba;
853e2bd2
BG		 616 dma_addr_t addr;
617 size_t sz;
618
619 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
620 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
621
622 mp_req->req_len = sizeof(struct fcp_cmnd);
623 io_req->data_xfer_len = mp_req->req_len;
624 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
625 &mp_req->req_buf_dma,
626 GFP_ATOMIC);
627 if (!mp_req->req_buf) {
628 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
629 bnx2fc_free_mp_resc(io_req);
630 return FAILED;
631 }
632
633 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
634 &mp_req->resp_buf_dma,
635 GFP_ATOMIC);
636 if (!mp_req->resp_buf) {
637 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
638 bnx2fc_free_mp_resc(io_req);
639 return FAILED;
640 }
641 memset(mp_req->req_buf, 0, PAGE_SIZE);
642 memset(mp_req->resp_buf, 0, PAGE_SIZE);
643
644 /* Allocate and map mp_req_bd and mp_resp_bd */
645 sz = sizeof(struct fcoe_bd_ctx);
646 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
647 &mp_req->mp_req_bd_dma,
648 GFP_ATOMIC);
649 if (!mp_req->mp_req_bd) {
650 printk(KERN_ERR PFX "unable to alloc MP req bd\n");
651 bnx2fc_free_mp_resc(io_req);
652 return FAILED;
653 }
654 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
655 &mp_req->mp_resp_bd_dma,
656 GFP_ATOMIC);
657 if (!mp_req->mp_req_bd) {
658 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
659 bnx2fc_free_mp_resc(io_req);
660 return FAILED;
661 }
662 /* Fill bd table */
663 addr = mp_req->req_buf_dma;
664 mp_req_bd = mp_req->mp_req_bd;
665 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
666 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
667 mp_req_bd->buf_len = PAGE_SIZE;
668 mp_req_bd->flags = 0;
669
670 /*
671 * MP buffer is either a task mgmt command or an ELS.
672 * So the assumption is that it consumes a single bd
673 * entry in the bd table
674 */
675 mp_resp_bd = mp_req->mp_resp_bd;
676 addr = mp_req->resp_buf_dma;
677 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
678 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
679 mp_resp_bd->buf_len = PAGE_SIZE;
680 mp_resp_bd->flags = 0;
681
682 return SUCCESS;
683}
684
685static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
686{
687 struct fc_lport *lport;
688 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
689 struct fc_rport_libfc_priv *rp = rport->dd_data;
690 struct fcoe_port *port;
aea71a02 691 struct bnx2fc_interface *interface;
853e2bd2
BG		 692 struct bnx2fc_rport *tgt;
693 struct bnx2fc_cmd *io_req;
694 struct bnx2fc_mp_req *tm_req;
695 struct fcoe_task_ctx_entry *task;
696 struct fcoe_task_ctx_entry *task_page;
697 struct Scsi_Host *host = sc_cmd->device->host;
698 struct fc_frame_header *fc_hdr;
699 struct fcp_cmnd *fcp_cmnd;
700 int task_idx, index;
701 int rc = SUCCESS;
702 u16 xid;
703 u32 sid, did;
704 unsigned long start = jiffies;
705
706 lport = shost_priv(host);
707 port = lport_priv(lport);
aea71a02 708 interface = port->priv;
853e2bd2
BG		 709
710 if (rport == NULL) {
b2a554ff 711 printk(KERN_ERR PFX "device_reset: rport is NULL\n");
853e2bd2
BG		 712 rc = FAILED;
713 goto tmf_err;
714 }
715
716 rc = fc_block_scsi_eh(sc_cmd);
717 if (rc)
718 return rc;
719
720 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
721 printk(KERN_ERR PFX "device_reset: link is not ready\n");
722 rc = FAILED;
723 goto tmf_err;
724 }
725 /* rport and tgt are allocated together, so tgt should be non-NULL */
726 tgt = (struct bnx2fc_rport *)&rp[1];
727
728 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
729 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
730 rc = FAILED;
731 goto tmf_err;
732 }
733retry_tmf:
734 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
735 if (!io_req) {
736 if (time_after(jiffies, start + HZ)) {
737 printk(KERN_ERR PFX "tmf: Failed TMF");
738 rc = FAILED;
739 goto tmf_err;
740 }
741 msleep(20);
742 goto retry_tmf;
743 }
744 /* Initialize rest of io_req fields */
745 io_req->sc_cmd = sc_cmd;
746 io_req->port = port;
747 io_req->tgt = tgt;
748
749 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
750
751 rc = bnx2fc_init_mp_req(io_req);
752 if (rc == FAILED) {
753 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
bd4d5de8 754 spin_lock_bh(&tgt->tgt_lock);
853e2bd2 755 kref_put(&io_req->refcount, bnx2fc_cmd_release);
bd4d5de8 756 spin_unlock_bh(&tgt->tgt_lock);
853e2bd2
BG		 757 goto tmf_err;
758 }
759
760 /* Set TM flags */
761 io_req->io_req_flags = 0;
762 tm_req->tm_flags = tm_flags;
763
764 /* Fill FCP_CMND */
765 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
766 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
767 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len);
768 fcp_cmnd->fc_dl = 0;
769
770 /* Fill FC header */
771 fc_hdr = &(tm_req->req_fc_hdr);
772 sid = tgt->sid;
773 did = rport->port_id;
774 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
775 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
776 FC_FC_SEQ_INIT, 0);
777 /* Obtain exchange id */
778 xid = io_req->xid;
779
780 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
781 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
782 index = xid % BNX2FC_TASKS_PER_PAGE;
783
784 /* Initialize task context for this IO request */
aea71a02
BPG		 785 task_page = (struct fcoe_task_ctx_entry *)
786 interface->hba->task_ctx[task_idx];
853e2bd2
BG		 787 task = &(task_page[index]);
788 bnx2fc_init_mp_task(io_req, task);
789
790 sc_cmd->SCp.ptr = (char *)io_req;
791
792 /* Obtain free SQ entry */
793 spin_lock_bh(&tgt->tgt_lock);
794 bnx2fc_add_2_sq(tgt, xid);
795
796 /* Enqueue the io_req to active_tm_queue */
797 io_req->on_tmf_queue = 1;
798 list_add_tail(&io_req->link, &tgt->active_tm_queue);
799
800 init_completion(&io_req->tm_done);
801 io_req->wait_for_comp = 1;
802
803 /* Ring doorbell */
804 bnx2fc_ring_doorbell(tgt);
805 spin_unlock_bh(&tgt->tgt_lock);
806
807 rc = wait_for_completion_timeout(&io_req->tm_done,
808 BNX2FC_TM_TIMEOUT * HZ);
809 spin_lock_bh(&tgt->tgt_lock);
810
811 io_req->wait_for_comp = 0;
92886c9c 812 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {
853e2bd2 813 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
92886c9c
BPG		 814 if (io_req->on_tmf_queue) {
815 list_del_init(&io_req->link);
816 io_req->on_tmf_queue = 0;
817 }
818 io_req->wait_for_comp = 1;
819 bnx2fc_initiate_cleanup(io_req);
820 spin_unlock_bh(&tgt->tgt_lock);
821 rc = wait_for_completion_timeout(&io_req->tm_done,
822 BNX2FC_FW_TIMEOUT);
823 spin_lock_bh(&tgt->tgt_lock);
824 io_req->wait_for_comp = 0;
825 if (!rc)
826 kref_put(&io_req->refcount, bnx2fc_cmd_release);
827 }
853e2bd2
BG		 828
829 spin_unlock_bh(&tgt->tgt_lock);
830
831 if (!rc) {
b2a554ff 832 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
853e2bd2
BG		 833 rc = FAILED;
834 } else {
b2a554ff 835 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
853e2bd2
BG		 836 rc = SUCCESS;
837 }
838tmf_err:
839 return rc;
840}
841
842int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
843{
844 struct fc_lport *lport;
845 struct bnx2fc_rport *tgt = io_req->tgt;
846 struct fc_rport *rport = tgt->rport;
847 struct fc_rport_priv *rdata = tgt->rdata;
aea71a02 848 struct bnx2fc_interface *interface;
853e2bd2
BG		 849 struct fcoe_port *port;
850 struct bnx2fc_cmd *abts_io_req;
851 struct fcoe_task_ctx_entry *task;
852 struct fcoe_task_ctx_entry *task_page;
853 struct fc_frame_header *fc_hdr;
854 struct bnx2fc_mp_req *abts_req;
855 int task_idx, index;
856 u32 sid, did;
857 u16 xid;
858 int rc = SUCCESS;
859 u32 r_a_tov = rdata->r_a_tov;
860
861 /* called with tgt_lock held */
862 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
863
864 port = io_req->port;
aea71a02 865 interface = port->priv;
853e2bd2
BG		 866 lport = port->lport;
867
868 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
869 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
870 rc = FAILED;
871 goto abts_err;
872 }
873
874 if (rport == NULL) {
b2a554ff 875 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
853e2bd2
BG		 876 rc = FAILED;
877 goto abts_err;
878 }
879
880 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
881 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
882 rc = FAILED;
883 goto abts_err;
884 }
885
886 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
887 if (!abts_io_req) {
888 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
889 rc = FAILED;
890 goto abts_err;
891 }
892
893 /* Initialize rest of io_req fields */
894 abts_io_req->sc_cmd = NULL;
895 abts_io_req->port = port;
896 abts_io_req->tgt = tgt;
897 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
898
899 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
900 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
901
902 /* Fill FC header */
903 fc_hdr = &(abts_req->req_fc_hdr);
904
905 /* Obtain oxid and rxid for the original exchange to be aborted */
906 fc_hdr->fh_ox_id = htons(io_req->xid);
619c5cb6 907 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
853e2bd2
BG		 908
909 sid = tgt->sid;
910 did = rport->port_id;
911
912 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
913 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
914 FC_FC_SEQ_INIT, 0);
915
916 xid = abts_io_req->xid;
917 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
918 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
919 index = xid % BNX2FC_TASKS_PER_PAGE;
920
921 /* Initialize task context for this IO request */
aea71a02
BPG		 922 task_page = (struct fcoe_task_ctx_entry *)
923 interface->hba->task_ctx[task_idx];
853e2bd2
BG		 924 task = &(task_page[index]);
925 bnx2fc_init_mp_task(abts_io_req, task);
926
927 /*
928 * ABTS task is a temporary task that will be cleaned up
929 * irrespective of ABTS response. We need to start the timer
930 * for the original exchange, as the CQE is posted for the original
931 * IO request.
932 *
933 * Timer for ABTS is started only when it is originated by a
934 * TM request. For the ABTS issued as part of ULP timeout,
935 * scsi-ml maintains the timers.
936 */
937
938 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
939 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
940
941 /* Obtain free SQ entry */
942 bnx2fc_add_2_sq(tgt, xid);
943
944 /* Ring doorbell */
945 bnx2fc_ring_doorbell(tgt);
946
947abts_err:
948 return rc;
949}
950
6c5a7ce4
BPG		 951int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
952 enum fc_rctl r_ctl)
953{
954 struct fc_lport *lport;
955 struct bnx2fc_rport *tgt = orig_io_req->tgt;
956 struct bnx2fc_interface *interface;
957 struct fcoe_port *port;
958 struct bnx2fc_cmd *seq_clnp_req;
959 struct fcoe_task_ctx_entry *task;
960 struct fcoe_task_ctx_entry *task_page;
961 struct bnx2fc_els_cb_arg *cb_arg = NULL;
962 int task_idx, index;
963 u16 xid;
964 int rc = 0;
965
966 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",
967 orig_io_req->xid);
968 kref_get(&orig_io_req->refcount);
969
970 port = orig_io_req->port;
971 interface = port->priv;
972 lport = port->lport;
973
974 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
975 if (!cb_arg) {
976 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
977 rc = -ENOMEM;
978 goto cleanup_err;
979 }
980
981 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
982 if (!seq_clnp_req) {
983 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
984 rc = -ENOMEM;
985 kfree(cb_arg);
986 goto cleanup_err;
987 }
988 /* Initialize rest of io_req fields */
989 seq_clnp_req->sc_cmd = NULL;
990 seq_clnp_req->port = port;
991 seq_clnp_req->tgt = tgt;
992 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
993
994 xid = seq_clnp_req->xid;
995
996 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
997 index = xid % BNX2FC_TASKS_PER_PAGE;
998
999 /* Initialize task context for this IO request */
1000 task_page = (struct fcoe_task_ctx_entry *)
1001 interface->hba->task_ctx[task_idx];
1002 task = &(task_page[index]);
1003 cb_arg->aborted_io_req = orig_io_req;
1004 cb_arg->io_req = seq_clnp_req;
1005 cb_arg->r_ctl = r_ctl;
1006 cb_arg->offset = offset;
1007 seq_clnp_req->cb_arg = cb_arg;
1008
1009 printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
1010 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
1011
1012 /* Obtain free SQ entry */
1013 bnx2fc_add_2_sq(tgt, xid);
1014
1015 /* Ring doorbell */
1016 bnx2fc_ring_doorbell(tgt);
1017cleanup_err:
1018 return rc;
1019}
1020
853e2bd2
BG		 1021int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
1022{
1023 struct fc_lport *lport;
1024 struct bnx2fc_rport *tgt = io_req->tgt;
aea71a02 1025 struct bnx2fc_interface *interface;
853e2bd2
BG		 1026 struct fcoe_port *port;
1027 struct bnx2fc_cmd *cleanup_io_req;
1028 struct fcoe_task_ctx_entry *task;
1029 struct fcoe_task_ctx_entry *task_page;
1030 int task_idx, index;
1031 u16 xid, orig_xid;
1032 int rc = 0;
1033
1034 /* ASSUMPTION: called with tgt_lock held */
1035 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1036
1037 port = io_req->port;
aea71a02 1038 interface = port->priv;
853e2bd2
BG		 1039 lport = port->lport;
1040
1041 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1042 if (!cleanup_io_req) {
1043 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
1044 rc = -1;
1045 goto cleanup_err;
1046 }
1047
1048 /* Initialize rest of io_req fields */
1049 cleanup_io_req->sc_cmd = NULL;
1050 cleanup_io_req->port = port;
1051 cleanup_io_req->tgt = tgt;
1052 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1053
1054 xid = cleanup_io_req->xid;
1055
1056 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1057 index = xid % BNX2FC_TASKS_PER_PAGE;
1058
1059 /* Initialize task context for this IO request */
aea71a02
BPG		 1060 task_page = (struct fcoe_task_ctx_entry *)
1061 interface->hba->task_ctx[task_idx];
853e2bd2
BG		 1062 task = &(task_page[index]);
1063 orig_xid = io_req->xid;
1064
1065 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1066
1067 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1068
1069 /* Obtain free SQ entry */
1070 bnx2fc_add_2_sq(tgt, xid);
1071
1072 /* Ring doorbell */
1073 bnx2fc_ring_doorbell(tgt);
1074
1075cleanup_err:
1076 return rc;
1077}
1078
1079/**
1080 * bnx2fc_eh_target_reset: Reset a target
1081 *
1082 * @sc_cmd: SCSI command
1083 *
1084 * Set from SCSI host template to send task mgmt command to the target
1085 * and wait for the response
1086 */
1087int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
1088{
1089 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
1090}
1091
1092/**
1093 * bnx2fc_eh_device_reset - Reset a single LUN
1094 *
1095 * @sc_cmd: SCSI command
1096 *
1097 * Set from SCSI host template to send task mgmt command to the target
1098 * and wait for the response
1099 */
1100int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1101{
1102 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1103}
1104
c1bb4f33
BPG		 1105int bnx2fc_expl_logo(struct fc_lport *lport, struct bnx2fc_cmd *io_req)
1106{
1107 struct bnx2fc_rport *tgt = io_req->tgt;
1108 struct fc_rport_priv *rdata = tgt->rdata;
1109 int logo_issued;
1110 int rc = SUCCESS;
1111 int wait_cnt = 0;
1112
1113 BNX2FC_IO_DBG(io_req, "Expl logo - tgt flags = 0x%lx\n",
1114 tgt->flags);
1115 logo_issued = test_and_set_bit(BNX2FC_FLAG_EXPL_LOGO,
1116 &tgt->flags);
1117 io_req->wait_for_comp = 1;
1118 bnx2fc_initiate_cleanup(io_req);
1119
1120 spin_unlock_bh(&tgt->tgt_lock);
1121
1122 wait_for_completion(&io_req->tm_done);
1123
1124 io_req->wait_for_comp = 0;
1125 /*
1126 * release the reference taken in eh_abort to allow the
1127 * target to re-login after flushing IOs
1128 */
1129 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1130
1131 if (!logo_issued) {
1132 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
1133 mutex_lock(&lport->disc.disc_mutex);
1134 lport->tt.rport_logoff(rdata);
1135 mutex_unlock(&lport->disc.disc_mutex);
1136 do {
1137 msleep(BNX2FC_RELOGIN_WAIT_TIME);
1138 if (wait_cnt++ > BNX2FC_RELOGIN_WAIT_CNT) {
1139 rc = FAILED;
1140 break;
1141 }
1142 } while (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags));
1143 }
1144 spin_lock_bh(&tgt->tgt_lock);
1145 return rc;
1146}
853e2bd2
BG		 1147/**
1148 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1149 * SCSI command
1150 *
1151 * @sc_cmd: SCSI_ML command pointer
1152 *
1153 * SCSI abort request handler
1154 */
1155int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1156{
1157 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1158 struct fc_rport_libfc_priv *rp = rport->dd_data;
1159 struct bnx2fc_cmd *io_req;
1160 struct fc_lport *lport;
1161 struct bnx2fc_rport *tgt;
1162 int rc = FAILED;
1163
1164
1165 rc = fc_block_scsi_eh(sc_cmd);
1166 if (rc)
1167 return rc;
1168
1169 lport = shost_priv(sc_cmd->device->host);
1170 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
b2a554ff 1171 printk(KERN_ERR PFX "eh_abort: link not ready\n");
853e2bd2
BG		 1172 return rc;
1173 }
1174
1175 tgt = (struct bnx2fc_rport *)&rp[1];
1176
1177 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1178
1179 spin_lock_bh(&tgt->tgt_lock);
1180 io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1181 if (!io_req) {
1182 /* Command might have just completed */
1183 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1184 spin_unlock_bh(&tgt->tgt_lock);
1185 return SUCCESS;
1186 }
1187 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1188 io_req->refcount.refcount.counter);
1189
1190 /* Hold IO request across abort processing */
1191 kref_get(&io_req->refcount);
1192
1193 BUG_ON(tgt != io_req->tgt);
1194
1195 /* Remove the io_req from the active_q. */
1196 /*
1197 * Task Mgmt functions (LUN RESET & TGT RESET) will not
1198 * issue an ABTS on this particular IO req, as the
1199 * io_req is no longer in the active_q.
1200 */
1201 if (tgt->flush_in_prog) {
b2a554ff 1202 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
853e2bd2
BG		 1203 "flush in progress\n", io_req->xid);
1204 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1205 spin_unlock_bh(&tgt->tgt_lock);
1206 return SUCCESS;
1207 }
1208
1209 if (io_req->on_active_queue == 0) {
b2a554ff 1210 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
853e2bd2
BG		 1211 "not on active_q\n", io_req->xid);
1212 /*
1213 * This condition can happen only due to the FW bug,
1214 * where we do not receive cleanup response from
1215 * the FW. Handle this case gracefully by erroring
1216 * back the IO request to SCSI-ml
1217 */
1218 bnx2fc_scsi_done(io_req, DID_ABORT);
1219
1220 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1221 spin_unlock_bh(&tgt->tgt_lock);
1222 return SUCCESS;
1223 }
1224
1225 /*
1226 * Only eh_abort processing will remove the IO from
1227 * active_cmd_q before processing the request. this is
1228 * done to avoid race conditions between IOs aborted
1229 * as part of task management completion and eh_abort
1230 * processing
1231 */
1232 list_del_init(&io_req->link);
1233 io_req->on_active_queue = 0;
1234 /* Move IO req to retire queue */
1235 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1236
1237 init_completion(&io_req->tm_done);
853e2bd2 1238
c1bb4f33 1239 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
b2a554ff 1240 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
853e2bd2 1241 "already in abts processing\n", io_req->xid);
99cc600c
BPG		 1242 if (cancel_delayed_work(&io_req->timeout_work))
1243 kref_put(&io_req->refcount,
1244 bnx2fc_cmd_release); /* drop timer hold */
c1bb4f33
BPG		 1245 rc = bnx2fc_expl_logo(lport, io_req);
1246 goto out;
1247 }
99cc600c 1248
c1bb4f33
BPG		 1249 /* Cancel the current timer running on this io_req */
1250 if (cancel_delayed_work(&io_req->timeout_work))
1251 kref_put(&io_req->refcount,
1252 bnx2fc_cmd_release); /* drop timer hold */
1253 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1254 io_req->wait_for_comp = 1;
1255 rc = bnx2fc_initiate_abts(io_req);
1256 if (rc == FAILED) {
1257 bnx2fc_initiate_cleanup(io_req);
99cc600c 1258 spin_unlock_bh(&tgt->tgt_lock);
99cc600c 1259 wait_for_completion(&io_req->tm_done);
99cc600c
BPG		 1260 spin_lock_bh(&tgt->tgt_lock);
1261 io_req->wait_for_comp = 0;
c1bb4f33 1262 goto done;
853e2bd2
BG		 1263 }
1264 spin_unlock_bh(&tgt->tgt_lock);
1265
1266 wait_for_completion(&io_req->tm_done);
1267
1268 spin_lock_bh(&tgt->tgt_lock);
1269 io_req->wait_for_comp = 0;
1270 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1271 &io_req->req_flags))) {
1272 /* Let the scsi-ml try to recover this command */
1273 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1274 io_req->xid);
c1bb4f33
BPG		 1275 rc = bnx2fc_expl_logo(lport, io_req);
1276 goto out;
853e2bd2
BG		 1277 } else {
1278 /*
1279 * We come here even when there was a race condition
1280 * between timeout and abts completion, and abts
1281 * completion happens just in time.
1282 */
1283 BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1284 rc = SUCCESS;
1285 bnx2fc_scsi_done(io_req, DID_ABORT);
1286 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1287 }
c1bb4f33 1288done:
853e2bd2
BG		 1289 /* release the reference taken in eh_abort */
1290 kref_put(&io_req->refcount, bnx2fc_cmd_release);
c1bb4f33 1291out:
853e2bd2
BG		 1292 spin_unlock_bh(&tgt->tgt_lock);
1293 return rc;
1294}
1295
6c5a7ce4
BPG		 1296void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
1297 struct fcoe_task_ctx_entry *task,
1298 u8 rx_state)
1299{
1300 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
1301 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
1302 u32 offset = cb_arg->offset;
1303 enum fc_rctl r_ctl = cb_arg->r_ctl;
1304 int rc = 0;
1305 struct bnx2fc_rport *tgt = orig_io_req->tgt;
1306
1307 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
1308 "cmd_type = %d\n",
1309 seq_clnp_req->xid, seq_clnp_req->cmd_type);
1310
1311 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
1312 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
1313 seq_clnp_req->xid);
1314 goto free_cb_arg;
1315 }
6c5a7ce4
BPG		 1316
1317 spin_unlock_bh(&tgt->tgt_lock);
1318 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
1319 spin_lock_bh(&tgt->tgt_lock);
1320
1321 if (rc)
1322 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
1323 " IO will abort\n");
1324 seq_clnp_req->cb_arg = NULL;
1325 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
1326free_cb_arg:
1327 kfree(cb_arg);
1328 return;
1329}
1330
853e2bd2
BG		 1331void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1332 struct fcoe_task_ctx_entry *task,
1333 u8 num_rq)
1334{
1335 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1336 "refcnt = %d, cmd_type = %d\n",
1337 io_req->refcount.refcount.counter, io_req->cmd_type);
1338 bnx2fc_scsi_done(io_req, DID_ERROR);
1339 kref_put(&io_req->refcount, bnx2fc_cmd_release);
99cc600c
BPG		 1340 if (io_req->wait_for_comp)
1341 complete(&io_req->tm_done);
853e2bd2
BG		 1342}
1343
1344void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1345 struct fcoe_task_ctx_entry *task,
1346 u8 num_rq)
1347{
1348 u32 r_ctl;
1349 u32 r_a_tov = FC_DEF_R_A_TOV;
1350 u8 issue_rrq = 0;
1351 struct bnx2fc_rport *tgt = io_req->tgt;
1352
1353 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1354 "refcnt = %d, cmd_type = %d\n",
1355 io_req->xid,
1356 io_req->refcount.refcount.counter, io_req->cmd_type);
1357
1358 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1359 &io_req->req_flags)) {
1360 BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1361 " this io\n");
1362 return;
1363 }
1364
1365 /* Do not issue RRQ as this IO is already cleanedup */
1366 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1367 &io_req->req_flags))
1368 goto io_compl;
1369
1370 /*
1371 * For ABTS issued due to SCSI eh_abort_handler, timeout
1372 * values are maintained by scsi-ml itself. Cancel timeout
1373 * in case ABTS issued as part of task management function
1374 * or due to FW error.
1375 */
1376 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1377 if (cancel_delayed_work(&io_req->timeout_work))
1378 kref_put(&io_req->refcount,
1379 bnx2fc_cmd_release); /* drop timer hold */
1380
619c5cb6 1381 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
853e2bd2
BG		 1382
1383 switch (r_ctl) {
1384 case FC_RCTL_BA_ACC:
1385 /*
1386 * Dont release this cmd yet. It will be relesed
1387 * after we get RRQ response
1388 */
1389 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1390 issue_rrq = 1;
1391 break;
1392
1393 case FC_RCTL_BA_RJT:
1394 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1395 break;
1396 default:
1397 printk(KERN_ERR PFX "Unknown ABTS response\n");
1398 break;
1399 }
1400
1401 if (issue_rrq) {
1402 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1403 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1404 }
1405 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1406 bnx2fc_cmd_timer_set(io_req, r_a_tov);
1407
1408io_compl:
1409 if (io_req->wait_for_comp) {
1410 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1411 &io_req->req_flags))
1412 complete(&io_req->tm_done);
1413 } else {
1414 /*
1415 * We end up here when ABTS is issued as
1416 * in asynchronous context, i.e., as part
1417 * of task management completion, or
1418 * when FW error is received or when the
1419 * ABTS is issued when the IO is timed
1420 * out.
1421 */
1422
1423 if (io_req->on_active_queue) {
1424 list_del_init(&io_req->link);
1425 io_req->on_active_queue = 0;
1426 /* Move IO req to retire queue */
1427 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1428 }
1429 bnx2fc_scsi_done(io_req, DID_ERROR);
1430 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1431 }
1432}
1433
1434static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1435{
1436 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1437 struct bnx2fc_rport *tgt = io_req->tgt;
d71fb3bd 1438 struct bnx2fc_cmd *cmd, *tmp;
853e2bd2
BG		 1439 int tm_lun = sc_cmd->device->lun;
1440 int rc = 0;
1441 int lun;
1442
1443 /* called with tgt_lock held */
1444 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1445 /*
1446 * Walk thru the active_ios queue and ABORT the IO
1447 * that matches with the LUN that was reset
1448 */
d71fb3bd 1449 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
853e2bd2 1450 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
853e2bd2
BG		 1451 lun = cmd->sc_cmd->device->lun;
1452 if (lun == tm_lun) {
1453 /* Initiate ABTS on this cmd */
1454 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1455 &cmd->req_flags)) {
1456 /* cancel the IO timeout */
1457 if (cancel_delayed_work(&io_req->timeout_work))
1458 kref_put(&io_req->refcount,
1459 bnx2fc_cmd_release);
1460 /* timer hold */
1461 rc = bnx2fc_initiate_abts(cmd);
25985edc 1462 /* abts shouldn't fail in this context */
853e2bd2
BG		 1463 WARN_ON(rc != SUCCESS);
1464 } else
1465 printk(KERN_ERR PFX "lun_rst: abts already in"
1466 " progress for this IO 0x%x\n",
1467 cmd->xid);
1468 }
1469 }
1470}
1471
1472static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1473{
1474 struct bnx2fc_rport *tgt = io_req->tgt;
d71fb3bd 1475 struct bnx2fc_cmd *cmd, *tmp;
853e2bd2
BG		 1476 int rc = 0;
1477
1478 /* called with tgt_lock held */
1479 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1480 /*
1481 * Walk thru the active_ios queue and ABORT the IO
1482 * that matches with the LUN that was reset
1483 */
d71fb3bd 1484 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
853e2bd2 1485 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
853e2bd2
BG		 1486 /* Initiate ABTS */
1487 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1488 &cmd->req_flags)) {
1489 /* cancel the IO timeout */
1490 if (cancel_delayed_work(&io_req->timeout_work))
1491 kref_put(&io_req->refcount,
1492 bnx2fc_cmd_release); /* timer hold */
1493 rc = bnx2fc_initiate_abts(cmd);
25985edc 1494 /* abts shouldn't fail in this context */
853e2bd2
BG		 1495 WARN_ON(rc != SUCCESS);
1496
1497 } else
1498 printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1499 " for this IO 0x%x\n", cmd->xid);
1500 }
1501}
1502
1503void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1504 struct fcoe_task_ctx_entry *task, u8 num_rq)
1505{
1506 struct bnx2fc_mp_req *tm_req;
1507 struct fc_frame_header *fc_hdr;
1508 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1509 u64 *hdr;
1510 u64 *temp_hdr;
1511 void *rsp_buf;
1512
1513 /* Called with tgt_lock held */
1514 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1515
1516 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1517 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1518 else {
1519 /* TM has already timed out and we got
1520 * delayed completion. Ignore completion
1521 * processing.
1522 */
1523 return;
1524 }
1525
1526 tm_req = &(io_req->mp_req);
1527 fc_hdr = &(tm_req->resp_fc_hdr);
1528 hdr = (u64 *)fc_hdr;
1529 temp_hdr = (u64 *)
619c5cb6 1530 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
853e2bd2
BG		 1531 hdr[0] = cpu_to_be64(temp_hdr[0]);
1532 hdr[1] = cpu_to_be64(temp_hdr[1]);
1533 hdr[2] = cpu_to_be64(temp_hdr[2]);
1534
619c5cb6
VZ		 1535 tm_req->resp_len =
1536 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
853e2bd2
BG		 1537
1538 rsp_buf = tm_req->resp_buf;
1539
1540 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1541 bnx2fc_parse_fcp_rsp(io_req,
1542 (struct fcoe_fcp_rsp_payload *)
1543 rsp_buf, num_rq);
1544 if (io_req->fcp_rsp_code == 0) {
1545 /* TM successful */
1546 if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1547 bnx2fc_lun_reset_cmpl(io_req);
1548 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1549 bnx2fc_tgt_reset_cmpl(io_req);
1550 }
1551 } else {
1552 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1553 fc_hdr->fh_r_ctl);
1554 }
1555 if (!sc_cmd->SCp.ptr) {
b2a554ff 1556 printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
853e2bd2
BG		 1557 return;
1558 }
1559 switch (io_req->fcp_status) {
1560 case FC_GOOD:
1561 if (io_req->cdb_status == 0) {
1562 /* Good IO completion */
1563 sc_cmd->result = DID_OK << 16;
1564 } else {
1565 /* Transport status is good, SCSI status not good */
1566 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1567 }
1568 if (io_req->fcp_resid)
1569 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1570 break;
1571
1572 default:
1573 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1574 io_req->fcp_status);
1575 break;
1576 }
1577
1578 sc_cmd = io_req->sc_cmd;
1579 io_req->sc_cmd = NULL;
1580
1581 /* check if the io_req exists in tgt's tmf_q */
1582 if (io_req->on_tmf_queue) {
1583
1584 list_del_init(&io_req->link);
1585 io_req->on_tmf_queue = 0;
1586 } else {
1587
b2a554ff 1588 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
853e2bd2
BG		 1589 return;
1590 }
1591
1592 sc_cmd->SCp.ptr = NULL;
1593 sc_cmd->scsi_done(sc_cmd);
1594
1595 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1596 if (io_req->wait_for_comp) {
1597 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1598 complete(&io_req->tm_done);
1599 }
1600}
1601
1602static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1603 int bd_index)
1604{
1605 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1606 int frag_size, sg_frags;
1607
1608 sg_frags = 0;
1609 while (sg_len) {
1610 if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1611 frag_size = BNX2FC_BD_SPLIT_SZ;
1612 else
1613 frag_size = sg_len;
1614 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1615 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;
1616 bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1617 bd[bd_index + sg_frags].flags = 0;
1618
1619 addr += (u64) frag_size;
1620 sg_frags++;
1621 sg_len -= frag_size;
1622 }
1623 return sg_frags;
1624
1625}
1626
1627static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1628{
3ce41ea1
BPG		 1629 struct bnx2fc_interface *interface = io_req->port->priv;
1630 struct bnx2fc_hba *hba = interface->hba;
853e2bd2
BG		 1631 struct scsi_cmnd *sc = io_req->sc_cmd;
1632 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1633 struct scatterlist *sg;
1634 int byte_count = 0;
1635 int sg_count = 0;
1636 int bd_count = 0;
1637 int sg_frags;
1638 unsigned int sg_len;
1639 u64 addr;
1640 int i;
1641
3ce41ea1
BPG		 1642 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
1643 scsi_sg_count(sc), sc->sc_data_direction);
853e2bd2
BG		 1644 scsi_for_each_sg(sc, sg, sg_count, i) {
1645 sg_len = sg_dma_len(sg);
1646 addr = sg_dma_address(sg);
1647 if (sg_len > BNX2FC_MAX_BD_LEN) {
1648 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1649 bd_count);
1650 } else {
1651
1652 sg_frags = 1;
1653 bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1654 bd[bd_count].buf_addr_hi = addr >> 32;
1655 bd[bd_count].buf_len = (u16)sg_len;
1656 bd[bd_count].flags = 0;
1657 }
1658 bd_count += sg_frags;
1659 byte_count += sg_len;
1660 }
1661 if (byte_count != scsi_bufflen(sc))
1662 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1663 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1664 io_req->xid);
1665 return bd_count;
1666}
1667
822f2903 1668static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
853e2bd2
BG		 1669{
1670 struct scsi_cmnd *sc = io_req->sc_cmd;
1671 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1672 int bd_count;
1673
822f2903 1674 if (scsi_sg_count(sc)) {
853e2bd2 1675 bd_count = bnx2fc_map_sg(io_req);
822f2903
BPG		 1676 if (bd_count == 0)
1677 return -ENOMEM;
1678 } else {
853e2bd2
BG		 1679 bd_count = 0;
1680 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1681 bd[0].buf_len = bd[0].flags = 0;
1682 }
1683 io_req->bd_tbl->bd_valid = bd_count;
822f2903
BPG		 1684
1685 return 0;
853e2bd2
BG		 1686}
1687
1688static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1689{
1690 struct scsi_cmnd *sc = io_req->sc_cmd;
1691
1692 if (io_req->bd_tbl->bd_valid && sc) {
1693 scsi_dma_unmap(sc);
1694 io_req->bd_tbl->bd_valid = 0;
1695 }
1696}
1697
1698void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1699 struct fcp_cmnd *fcp_cmnd)
1700{
1701 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1702 char tag[2];
1703
1704 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1705
e35fa8c2 1706 int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
853e2bd2
BG		 1707
1708 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1709 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1710
1711 fcp_cmnd->fc_cmdref = 0;
1712 fcp_cmnd->fc_pri_ta = 0;
1713 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1714 fcp_cmnd->fc_flags = io_req->io_req_flags;
1715
1716 if (scsi_populate_tag_msg(sc_cmd, tag)) {
1717 switch (tag[0]) {
1718 case HEAD_OF_QUEUE_TAG:
1719 fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ;
1720 break;
1721 case ORDERED_QUEUE_TAG:
1722 fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED;
1723 break;
1724 default:
1725 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1726 break;
1727 }
1728 } else {
1729 fcp_cmnd->fc_pri_ta = 0;
1730 }
1731}
1732
1733static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1734 struct fcoe_fcp_rsp_payload *fcp_rsp,
1735 u8 num_rq)
1736{
1737 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1738 struct bnx2fc_rport *tgt = io_req->tgt;
1739 u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1740 u32 rq_buff_len = 0;
1741 int i;
1742 unsigned char *rq_data;
1743 unsigned char *dummy;
1744 int fcp_sns_len = 0;
1745 int fcp_rsp_len = 0;
1746
1747 io_req->fcp_status = FC_GOOD;
1748 io_req->fcp_resid = fcp_rsp->fcp_resid;
1749
1750 io_req->scsi_comp_flags = rsp_flags;
1751 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1752 fcp_rsp->scsi_status_code;
1753
1754 /* Fetch fcp_rsp_info and fcp_sns_info if available */
1755 if (num_rq) {
1756
1757 /*
1758 * We do not anticipate num_rq >1, as the linux defined
1759 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1760 * 256 bytes of single rq buffer is good enough to hold this.
1761 */
1762
1763 if (rsp_flags &
1764 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1765 fcp_rsp_len = rq_buff_len
1766 = fcp_rsp->fcp_rsp_len;
1767 }
1768
1769 if (rsp_flags &
1770 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1771 fcp_sns_len = fcp_rsp->fcp_sns_len;
1772 rq_buff_len += fcp_rsp->fcp_sns_len;
1773 }
1774
1775 io_req->fcp_rsp_len = fcp_rsp_len;
1776 io_req->fcp_sns_len = fcp_sns_len;
1777
1778 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1779 /* Invalid sense sense length. */
b2a554ff 1780 printk(KERN_ERR PFX "invalid sns length %d\n",
853e2bd2
BG		 1781 rq_buff_len);
1782 /* reset rq_buff_len */
1783 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;
1784 }
1785
1786 rq_data = bnx2fc_get_next_rqe(tgt, 1);
1787
1788 if (num_rq > 1) {
1789 /* We do not need extra sense data */
1790 for (i = 1; i < num_rq; i++)
1791 dummy = bnx2fc_get_next_rqe(tgt, 1);
1792 }
1793
1794 /* fetch fcp_rsp_code */
1795 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1796 /* Only for task management function */
1797 io_req->fcp_rsp_code = rq_data[3];
1798 printk(KERN_ERR PFX "fcp_rsp_code = %d\n",
1799 io_req->fcp_rsp_code);
1800 }
1801
1802 /* fetch sense data */
1803 rq_data += fcp_rsp_len;
1804
1805 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1806 printk(KERN_ERR PFX "Truncating sense buffer\n");
1807 fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1808 }
1809
16da05b1 1810 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
853e2bd2
BG		 1811 if (fcp_sns_len)
1812 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1813
1814 /* return RQ entries */
1815 for (i = 0; i < num_rq; i++)
1816 bnx2fc_return_rqe(tgt, 1);
1817 }
1818}
1819
1820/**
1821 * bnx2fc_queuecommand - Queuecommand function of the scsi template
1822 *
1823 * @host: The Scsi_Host the command was issued to
1824 * @sc_cmd: struct scsi_cmnd to be executed
1825 *
1826 * This is the IO strategy routine, called by SCSI-ML
1827 **/
1828int bnx2fc_queuecommand(struct Scsi_Host *host,
1829 struct scsi_cmnd *sc_cmd)
1830{
1831 struct fc_lport *lport = shost_priv(host);
1832 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1833 struct fc_rport_libfc_priv *rp = rport->dd_data;
1834 struct bnx2fc_rport *tgt;
1835 struct bnx2fc_cmd *io_req;
1836 int rc = 0;
1837 int rval;
1838
1839 rval = fc_remote_port_chkready(rport);
1840 if (rval) {
1841 sc_cmd->result = rval;
1842 sc_cmd->scsi_done(sc_cmd);
1843 return 0;
1844 }
1845
1846 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1847 rc = SCSI_MLQUEUE_HOST_BUSY;
1848 goto exit_qcmd;
1849 }
1850
1851 /* rport and tgt are allocated together, so tgt should be non-NULL */
1852 tgt = (struct bnx2fc_rport *)&rp[1];
1853
1854 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1855 /*
1856 * Session is not offloaded yet. Let SCSI-ml retry
1857 * the command.
1858 */
1859 rc = SCSI_MLQUEUE_TARGET_BUSY;
1860 goto exit_qcmd;
1861 }
1862
1863 io_req = bnx2fc_cmd_alloc(tgt);
1864 if (!io_req) {
1865 rc = SCSI_MLQUEUE_HOST_BUSY;
1866 goto exit_qcmd;
1867 }
1868 io_req->sc_cmd = sc_cmd;
1869
1870 if (bnx2fc_post_io_req(tgt, io_req)) {
1871 printk(KERN_ERR PFX "Unable to post io_req\n");
1872 rc = SCSI_MLQUEUE_HOST_BUSY;
1873 goto exit_qcmd;
1874 }
1875exit_qcmd:
1876 return rc;
1877}
1878
1879void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1880 struct fcoe_task_ctx_entry *task,
1881 u8 num_rq)
1882{
1883 struct fcoe_fcp_rsp_payload *fcp_rsp;
1884 struct bnx2fc_rport *tgt = io_req->tgt;
1885 struct scsi_cmnd *sc_cmd;
1886 struct Scsi_Host *host;
1887
1888
1889 /* scsi_cmd_cmpl is called with tgt lock held */
1890
1891 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1892 /* we will not receive ABTS response for this IO */
1893 BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1894 "this scsi cmd\n");
1895 }
1896
1897 /* Cancel the timeout_work, as we received IO completion */
1898 if (cancel_delayed_work(&io_req->timeout_work))
1899 kref_put(&io_req->refcount,
1900 bnx2fc_cmd_release); /* drop timer hold */
1901
1902 sc_cmd = io_req->sc_cmd;
1903 if (sc_cmd == NULL) {
1904 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1905 return;
1906 }
1907
1908 /* Fetch fcp_rsp from task context and perform cmd completion */
1909 fcp_rsp = (struct fcoe_fcp_rsp_payload *)
619c5cb6 1910 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
853e2bd2
BG		 1911
1912 /* parse fcp_rsp and obtain sense data from RQ if available */
1913 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
1914
1915 host = sc_cmd->device->host;
1916 if (!sc_cmd->SCp.ptr) {
1917 printk(KERN_ERR PFX "SCp.ptr is NULL\n");
1918 return;
1919 }
853e2bd2
BG		 1920
1921 if (io_req->on_active_queue) {
1922 list_del_init(&io_req->link);
1923 io_req->on_active_queue = 0;
1924 /* Move IO req to retire queue */
1925 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1926 } else {
1927 /* This should not happen, but could have been pulled
1928 * by bnx2fc_flush_active_ios(), or during a race
1929 * between command abort and (late) completion.
1930 */
1931 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
1932 if (io_req->wait_for_comp)
1933 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1934 &io_req->req_flags))
1935 complete(&io_req->tm_done);
1936 }
1937
1938 bnx2fc_unmap_sg_list(io_req);
b5a95fe7 1939 io_req->sc_cmd = NULL;
853e2bd2
BG		 1940
1941 switch (io_req->fcp_status) {
1942 case FC_GOOD:
1943 if (io_req->cdb_status == 0) {
1944 /* Good IO completion */
1945 sc_cmd->result = DID_OK << 16;
1946 } else {
1947 /* Transport status is good, SCSI status not good */
1948 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1949 " fcp_resid = 0x%x\n",
1950 io_req->cdb_status, io_req->fcp_resid);
1951 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1952 }
1953 if (io_req->fcp_resid)
1954 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1955 break;
1956 default:
b2a554ff 1957 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",
853e2bd2
BG		 1958 io_req->fcp_status);
1959 break;
1960 }
1961 sc_cmd->SCp.ptr = NULL;
1962 sc_cmd->scsi_done(sc_cmd);
1963 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1964}
1965
74446954 1966int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
853e2bd2
BG		 1967 struct bnx2fc_cmd *io_req)
1968{
1969 struct fcoe_task_ctx_entry *task;
1970 struct fcoe_task_ctx_entry *task_page;
1971 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1972 struct fcoe_port *port = tgt->port;
aea71a02
BPG		 1973 struct bnx2fc_interface *interface = port->priv;
1974 struct bnx2fc_hba *hba = interface->hba;
853e2bd2 1975 struct fc_lport *lport = port->lport;
1bd49b48 1976 struct fc_stats *stats;
853e2bd2
BG		 1977 int task_idx, index;
1978 u16 xid;
1979
1980 /* Initialize rest of io_req fields */
1981 io_req->cmd_type = BNX2FC_SCSI_CMD;
1982 io_req->port = port;
1983 io_req->tgt = tgt;
1984 io_req->data_xfer_len = scsi_bufflen(sc_cmd);
1985 sc_cmd->SCp.ptr = (char *)io_req;
1986
1bd49b48 1987 stats = per_cpu_ptr(lport->stats, get_cpu());
853e2bd2
BG		 1988 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
1989 io_req->io_req_flags = BNX2FC_READ;
1990 stats->InputRequests++;
1991 stats->InputBytes += io_req->data_xfer_len;
1992 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
1993 io_req->io_req_flags = BNX2FC_WRITE;
1994 stats->OutputRequests++;
1995 stats->OutputBytes += io_req->data_xfer_len;
1996 } else {
1997 io_req->io_req_flags = 0;
1998 stats->ControlRequests++;
1999 }
2000 put_cpu();
2001
2002 xid = io_req->xid;
2003
2004 /* Build buffer descriptor list for firmware from sg list */
822f2903
BPG		 2005 if (bnx2fc_build_bd_list_from_sg(io_req)) {
2006 printk(KERN_ERR PFX "BD list creation failed\n");
2007 spin_lock_bh(&tgt->tgt_lock);
2008 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2009 spin_unlock_bh(&tgt->tgt_lock);
2010 return -EAGAIN;
2011 }
853e2bd2
BG		 2012
2013 task_idx = xid / BNX2FC_TASKS_PER_PAGE;
2014 index = xid % BNX2FC_TASKS_PER_PAGE;
2015
2016 /* Initialize task context for this IO request */
2017 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
2018 task = &(task_page[index]);
2019 bnx2fc_init_task(io_req, task);
2020
2021 spin_lock_bh(&tgt->tgt_lock);
2022
2023 if (tgt->flush_in_prog) {
2024 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
2025 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2026 spin_unlock_bh(&tgt->tgt_lock);
2027 return -EAGAIN;
2028 }
2029
2030 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
2031 printk(KERN_ERR PFX "Session not ready...post_io\n");
2032 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2033 spin_unlock_bh(&tgt->tgt_lock);
2034 return -EAGAIN;
2035 }
2036
2037 /* Time IO req */
b252f4c7
BPG		 2038 if (tgt->io_timeout)
2039 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
853e2bd2
BG		 2040 /* Obtain free SQ entry */
2041 bnx2fc_add_2_sq(tgt, xid);
2042
2043 /* Enqueue the io_req to active_cmd_queue */
2044
2045 io_req->on_active_queue = 1;
2046 /* move io_req from pending_queue to active_queue */
2047 list_add_tail(&io_req->link, &tgt->active_cmd_queue);
2048
2049 /* Ring doorbell */
2050 bnx2fc_ring_doorbell(tgt);
2051 spin_unlock_bh(&tgt->tgt_lock);
2052 return 0;
2053}
Linux 6.x block layer and io_uring tree(s)