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Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb...
[linux-2.6-block.git] / drivers / scsi / bnx2fc / bnx2fc_io.c
CommitLineData
17d87c45 1/* bnx2fc_io.c: QLogic NetXtreme II Linux FCoE offload driver.
853e2bd2
BG		 2 * IO manager and SCSI IO processing.
3 *
cf122191 4 * Copyright (c) 2008 - 2013 Broadcom Corporation
17d87c45 5 * Copyright (c) 2014, QLogic Corporation
853e2bd2
BG		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation.
10 *
11 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
12 */
13
14#include "bnx2fc.h"
0ea5c275
BG		 15
16#define RESERVE_FREE_LIST_INDEX num_possible_cpus()
17
853e2bd2
BG		 18static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
19 int bd_index);
20static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
822f2903 21static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
853e2bd2
BG		 22static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
23static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
24static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
25 struct fcoe_fcp_rsp_payload *fcp_rsp,
26 u8 num_rq);
27
28void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
29 unsigned int timer_msec)
30{
aea71a02 31 struct bnx2fc_interface *interface = io_req->port->priv;
853e2bd2 32
aea71a02
BPG		 33 if (queue_delayed_work(interface->timer_work_queue,
34 &io_req->timeout_work,
35 msecs_to_jiffies(timer_msec)))
853e2bd2
BG		 36 kref_get(&io_req->refcount);
37}
38
39static 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
200done:
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
206static 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);
74446954
BPG		 220 if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {
221 /* Do not call scsi done for this IO */
222 return;
223 }
224
853e2bd2
BG		 225 bnx2fc_unmap_sg_list(io_req);
226 io_req->sc_cmd = NULL;
227 if (!sc_cmd) {
228 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
229 "IO(0x%x) already cleaned up\n",
230 io_req->xid);
231 return;
232 }
233 sc_cmd->result = err_code << 16;
234
235 BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
236 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
237 sc_cmd->allowed);
238 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
239 sc_cmd->SCp.ptr = NULL;
240 sc_cmd->scsi_done(sc_cmd);
241}
242
0eb43b4b 243struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba)
853e2bd2
BG		 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;
0eb43b4b
BPG		 255 u16 min_xid = BNX2FC_MIN_XID;
256 u16 max_xid = hba->max_xid;
853e2bd2
BG		 257
258 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
259 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
260 and max_xid 0x%x\n", min_xid, max_xid);
261 return NULL;
262 }
263 BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
264
265 num_ios = max_xid - min_xid + 1;
266 len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
267 len += sizeof(struct bnx2fc_cmd_mgr);
268
269 cmgr = kzalloc(len, GFP_KERNEL);
270 if (!cmgr) {
271 printk(KERN_ERR PFX "failed to alloc cmgr\n");
272 return NULL;
273 }
274
275 cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
0ea5c275 276 arr_sz, GFP_KERNEL);
853e2bd2
BG		 277 if (!cmgr->free_list) {
278 printk(KERN_ERR PFX "failed to alloc free_list\n");
279 goto mem_err;
280 }
281
282 cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
0ea5c275 283 arr_sz, GFP_KERNEL);
853e2bd2
BG		 284 if (!cmgr->free_list_lock) {
285 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
9172b763
ML		 286 kfree(cmgr->free_list);
287 cmgr->free_list = NULL;
853e2bd2
BG		 288 goto mem_err;
289 }
290
291 cmgr->hba = hba;
292 cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
293
0ea5c275 294 for (i = 0; i < arr_sz; i++) {
853e2bd2
BG		 295 INIT_LIST_HEAD(&cmgr->free_list[i]);
296 spin_lock_init(&cmgr->free_list_lock[i]);
297 }
298
0ea5c275
BG		 299 /*
300 * Pre-allocated pool of bnx2fc_cmds.
301 * Last entry in the free list array is the free list
302 * of slow path requests.
303 */
853e2bd2 304 xid = BNX2FC_MIN_XID;
0eb43b4b 305 num_pri_ios = num_ios - hba->elstm_xids;
853e2bd2
BG		 306 for (i = 0; i < num_ios; i++) {
307 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
308
309 if (!io_req) {
310 printk(KERN_ERR PFX "failed to alloc io_req\n");
311 goto mem_err;
312 }
313
314 INIT_LIST_HEAD(&io_req->link);
315 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
316
317 io_req->xid = xid++;
0ea5c275
BG		 318 if (i < num_pri_ios)
319 list_add_tail(&io_req->link,
320 &cmgr->free_list[io_req->xid %
321 num_possible_cpus()]);
322 else
323 list_add_tail(&io_req->link,
324 &cmgr->free_list[num_possible_cpus()]);
853e2bd2
BG		 325 io_req++;
326 }
327
328 /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
329 mem_size = num_ios * sizeof(struct io_bdt *);
330 cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL);
331 if (!cmgr->io_bdt_pool) {
332 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
333 goto mem_err;
334 }
335
336 mem_size = sizeof(struct io_bdt);
337 for (i = 0; i < num_ios; i++) {
338 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
339 if (!cmgr->io_bdt_pool[i]) {
340 printk(KERN_ERR PFX "failed to alloc "
341 "io_bdt_pool[%d]\n", i);
342 goto mem_err;
343 }
344 }
345
346 /* Allocate an map fcoe_bdt_ctx structures */
347 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
348 for (i = 0; i < num_ios; i++) {
349 bdt_info = cmgr->io_bdt_pool[i];
350 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
351 bd_tbl_sz,
352 &bdt_info->bd_tbl_dma,
353 GFP_KERNEL);
354 if (!bdt_info->bd_tbl) {
355 printk(KERN_ERR PFX "failed to alloc "
356 "bdt_tbl[%d]\n", i);
357 goto mem_err;
358 }
359 }
360
361 return cmgr;
362
363mem_err:
364 bnx2fc_cmd_mgr_free(cmgr);
365 return NULL;
366}
367
368void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
369{
370 struct io_bdt *bdt_info;
371 struct bnx2fc_hba *hba = cmgr->hba;
372 size_t bd_tbl_sz;
373 u16 min_xid = BNX2FC_MIN_XID;
0eb43b4b 374 u16 max_xid = hba->max_xid;
853e2bd2
BG		 375 int num_ios;
376 int i;
377
378 num_ios = max_xid - min_xid + 1;
379
380 /* Free fcoe_bdt_ctx structures */
381 if (!cmgr->io_bdt_pool)
382 goto free_cmd_pool;
383
384 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
385 for (i = 0; i < num_ios; i++) {
386 bdt_info = cmgr->io_bdt_pool[i];
387 if (bdt_info->bd_tbl) {
388 dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
389 bdt_info->bd_tbl,
390 bdt_info->bd_tbl_dma);
391 bdt_info->bd_tbl = NULL;
392 }
393 }
394
395 /* Destroy io_bdt pool */
396 for (i = 0; i < num_ios; i++) {
397 kfree(cmgr->io_bdt_pool[i]);
398 cmgr->io_bdt_pool[i] = NULL;
399 }
400
401 kfree(cmgr->io_bdt_pool);
402 cmgr->io_bdt_pool = NULL;
403
404free_cmd_pool:
405 kfree(cmgr->free_list_lock);
406
407 /* Destroy cmd pool */
408 if (!cmgr->free_list)
409 goto free_cmgr;
410
0ea5c275 411 for (i = 0; i < num_possible_cpus() + 1; i++) {
d71fb3bd 412 struct bnx2fc_cmd *tmp, *io_req;
853e2bd2 413
d71fb3bd
BPG		 414 list_for_each_entry_safe(io_req, tmp,
415 &cmgr->free_list[i], link) {
853e2bd2
BG		 416 list_del(&io_req->link);
417 kfree(io_req);
418 }
419 }
420 kfree(cmgr->free_list);
421free_cmgr:
422 /* Free command manager itself */
423 kfree(cmgr);
424}
425
426struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
427{
428 struct fcoe_port *port = tgt->port;
aea71a02
BPG		 429 struct bnx2fc_interface *interface = port->priv;
430 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
853e2bd2
BG		 431 struct bnx2fc_cmd *io_req;
432 struct list_head *listp;
433 struct io_bdt *bd_tbl;
0ea5c275 434 int index = RESERVE_FREE_LIST_INDEX;
619c5cb6 435 u32 free_sqes;
853e2bd2
BG		 436 u32 max_sqes;
437 u16 xid;
438
439 max_sqes = tgt->max_sqes;
440 switch (type) {
441 case BNX2FC_TASK_MGMT_CMD:
442 max_sqes = BNX2FC_TM_MAX_SQES;
443 break;
444 case BNX2FC_ELS:
445 max_sqes = BNX2FC_ELS_MAX_SQES;
446 break;
447 default:
448 break;
449 }
450
451 /*
452 * NOTE: Free list insertions and deletions are protected with
453 * cmgr lock
454 */
0ea5c275 455 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
619c5cb6 456 free_sqes = atomic_read(&tgt->free_sqes);
0ea5c275 457 if ((list_empty(&(cmd_mgr->free_list[index]))) ||
619c5cb6
VZ		 458 (tgt->num_active_ios.counter >= max_sqes) ||
459 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
853e2bd2
BG		 460 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
461 "ios(%d):sqes(%d)\n",
462 tgt->num_active_ios.counter, tgt->max_sqes);
0ea5c275 463 if (list_empty(&(cmd_mgr->free_list[index])))
853e2bd2 464 printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
0ea5c275 465 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
853e2bd2
BG		 466 return NULL;
467 }
468
469 listp = (struct list_head *)
0ea5c275 470 cmd_mgr->free_list[index].next;
853e2bd2
BG		 471 list_del_init(listp);
472 io_req = (struct bnx2fc_cmd *) listp;
473 xid = io_req->xid;
474 cmd_mgr->cmds[xid] = io_req;
475 atomic_inc(&tgt->num_active_ios);
619c5cb6 476 atomic_dec(&tgt->free_sqes);
0ea5c275 477 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
853e2bd2
BG		 478
479 INIT_LIST_HEAD(&io_req->link);
480
481 io_req->port = port;
482 io_req->cmd_mgr = cmd_mgr;
483 io_req->req_flags = 0;
484 io_req->cmd_type = type;
485
486 /* Bind io_bdt for this io_req */
487 /* Have a static link between io_req and io_bdt_pool */
488 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
489 bd_tbl->io_req = io_req;
490
491 /* Hold the io_req against deletion */
492 kref_init(&io_req->refcount);
493 return io_req;
494}
aea71a02
BPG		 495
496struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
853e2bd2
BG		 497{
498 struct fcoe_port *port = tgt->port;
aea71a02
BPG		 499 struct bnx2fc_interface *interface = port->priv;
500 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
853e2bd2
BG		 501 struct bnx2fc_cmd *io_req;
502 struct list_head *listp;
503 struct io_bdt *bd_tbl;
619c5cb6 504 u32 free_sqes;
853e2bd2
BG		 505 u32 max_sqes;
506 u16 xid;
0ea5c275 507 int index = get_cpu();
853e2bd2
BG		 508
509 max_sqes = BNX2FC_SCSI_MAX_SQES;
510 /*
511 * NOTE: Free list insertions and deletions are protected with
512 * cmgr lock
513 */
0ea5c275 514 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
619c5cb6 515 free_sqes = atomic_read(&tgt->free_sqes);
0ea5c275 516 if ((list_empty(&cmd_mgr->free_list[index])) ||
619c5cb6
VZ		 517 (tgt->num_active_ios.counter >= max_sqes) ||
518 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
0ea5c275
BG		 519 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
520 put_cpu();
853e2bd2
BG		 521 return NULL;
522 }
523
524 listp = (struct list_head *)
0ea5c275 525 cmd_mgr->free_list[index].next;
853e2bd2
BG		 526 list_del_init(listp);
527 io_req = (struct bnx2fc_cmd *) listp;
528 xid = io_req->xid;
529 cmd_mgr->cmds[xid] = io_req;
530 atomic_inc(&tgt->num_active_ios);
619c5cb6 531 atomic_dec(&tgt->free_sqes);
0ea5c275
BG		 532 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
533 put_cpu();
853e2bd2
BG		 534
535 INIT_LIST_HEAD(&io_req->link);
536
537 io_req->port = port;
538 io_req->cmd_mgr = cmd_mgr;
539 io_req->req_flags = 0;
540
541 /* Bind io_bdt for this io_req */
542 /* Have a static link between io_req and io_bdt_pool */
543 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
544 bd_tbl->io_req = io_req;
545
546 /* Hold the io_req against deletion */
547 kref_init(&io_req->refcount);
548 return io_req;
549}
550
551void bnx2fc_cmd_release(struct kref *ref)
552{
553 struct bnx2fc_cmd *io_req = container_of(ref,
554 struct bnx2fc_cmd, refcount);
555 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
0ea5c275
BG		 556 int index;
557
558 if (io_req->cmd_type == BNX2FC_SCSI_CMD)
559 index = io_req->xid % num_possible_cpus();
560 else
561 index = RESERVE_FREE_LIST_INDEX;
853e2bd2 562
0ea5c275
BG		 563
564 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
853e2bd2
BG		 565 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
566 bnx2fc_free_mp_resc(io_req);
567 cmd_mgr->cmds[io_req->xid] = NULL;
568 /* Delete IO from retire queue */
569 list_del_init(&io_req->link);
570 /* Add it to the free list */
571 list_add(&io_req->link,
0ea5c275 572 &cmd_mgr->free_list[index]);
853e2bd2 573 atomic_dec(&io_req->tgt->num_active_ios);
0ea5c275
BG		 574 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
575
853e2bd2
BG		 576}
577
578static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
579{
580 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
aea71a02
BPG		 581 struct bnx2fc_interface *interface = io_req->port->priv;
582 struct bnx2fc_hba *hba = interface->hba;
853e2bd2
BG		 583 size_t sz = sizeof(struct fcoe_bd_ctx);
584
585 /* clear tm flags */
586 mp_req->tm_flags = 0;
587 if (mp_req->mp_req_bd) {
588 dma_free_coherent(&hba->pcidev->dev, sz,
589 mp_req->mp_req_bd,
590 mp_req->mp_req_bd_dma);
591 mp_req->mp_req_bd = NULL;
592 }
593 if (mp_req->mp_resp_bd) {
594 dma_free_coherent(&hba->pcidev->dev, sz,
595 mp_req->mp_resp_bd,
596 mp_req->mp_resp_bd_dma);
597 mp_req->mp_resp_bd = NULL;
598 }
599 if (mp_req->req_buf) {
be1fefc2 600 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
853e2bd2
BG		 601 mp_req->req_buf,
602 mp_req->req_buf_dma);
603 mp_req->req_buf = NULL;
604 }
605 if (mp_req->resp_buf) {
be1fefc2 606 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
853e2bd2
BG		 607 mp_req->resp_buf,
608 mp_req->resp_buf_dma);
609 mp_req->resp_buf = NULL;
610 }
611}
612
613int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
614{
615 struct bnx2fc_mp_req *mp_req;
616 struct fcoe_bd_ctx *mp_req_bd;
617 struct fcoe_bd_ctx *mp_resp_bd;
aea71a02
BPG		 618 struct bnx2fc_interface *interface = io_req->port->priv;
619 struct bnx2fc_hba *hba = interface->hba;
853e2bd2
BG		 620 dma_addr_t addr;
621 size_t sz;
622
623 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
624 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
625
626 mp_req->req_len = sizeof(struct fcp_cmnd);
627 io_req->data_xfer_len = mp_req->req_len;
be1fefc2 628 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
853e2bd2
BG		 629 &mp_req->req_buf_dma,
630 GFP_ATOMIC);
631 if (!mp_req->req_buf) {
632 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
633 bnx2fc_free_mp_resc(io_req);
634 return FAILED;
635 }
636
be1fefc2 637 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
853e2bd2
BG		 638 &mp_req->resp_buf_dma,
639 GFP_ATOMIC);
640 if (!mp_req->resp_buf) {
641 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
642 bnx2fc_free_mp_resc(io_req);
643 return FAILED;
644 }
be1fefc2
MC		 645 memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);
646 memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);
853e2bd2
BG		 647
648 /* Allocate and map mp_req_bd and mp_resp_bd */
649 sz = sizeof(struct fcoe_bd_ctx);
650 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
651 &mp_req->mp_req_bd_dma,
652 GFP_ATOMIC);
653 if (!mp_req->mp_req_bd) {
654 printk(KERN_ERR PFX "unable to alloc MP req bd\n");
655 bnx2fc_free_mp_resc(io_req);
656 return FAILED;
657 }
658 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
659 &mp_req->mp_resp_bd_dma,
660 GFP_ATOMIC);
b0d5e15c 661 if (!mp_req->mp_resp_bd) {
853e2bd2
BG		 662 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
663 bnx2fc_free_mp_resc(io_req);
664 return FAILED;
665 }
666 /* Fill bd table */
667 addr = mp_req->req_buf_dma;
668 mp_req_bd = mp_req->mp_req_bd;
669 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
670 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
be1fefc2 671 mp_req_bd->buf_len = CNIC_PAGE_SIZE;
853e2bd2
BG		 672 mp_req_bd->flags = 0;
673
674 /*
675 * MP buffer is either a task mgmt command or an ELS.
676 * So the assumption is that it consumes a single bd
677 * entry in the bd table
678 */
679 mp_resp_bd = mp_req->mp_resp_bd;
680 addr = mp_req->resp_buf_dma;
681 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
682 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
be1fefc2 683 mp_resp_bd->buf_len = CNIC_PAGE_SIZE;
853e2bd2
BG		 684 mp_resp_bd->flags = 0;
685
686 return SUCCESS;
687}
688
689static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
690{
691 struct fc_lport *lport;
33c7da05
JL		 692 struct fc_rport *rport;
693 struct fc_rport_libfc_priv *rp;
853e2bd2 694 struct fcoe_port *port;
aea71a02 695 struct bnx2fc_interface *interface;
853e2bd2
BG		 696 struct bnx2fc_rport *tgt;
697 struct bnx2fc_cmd *io_req;
698 struct bnx2fc_mp_req *tm_req;
699 struct fcoe_task_ctx_entry *task;
700 struct fcoe_task_ctx_entry *task_page;
701 struct Scsi_Host *host = sc_cmd->device->host;
702 struct fc_frame_header *fc_hdr;
703 struct fcp_cmnd *fcp_cmnd;
704 int task_idx, index;
705 int rc = SUCCESS;
706 u16 xid;
707 u32 sid, did;
708 unsigned long start = jiffies;
709
710 lport = shost_priv(host);
33c7da05 711 rport = starget_to_rport(scsi_target(sc_cmd->device));
853e2bd2 712 port = lport_priv(lport);
aea71a02 713 interface = port->priv;
853e2bd2
BG		 714
715 if (rport == NULL) {
b2a554ff 716 printk(KERN_ERR PFX "device_reset: rport is NULL\n");
853e2bd2
BG		 717 rc = FAILED;
718 goto tmf_err;
719 }
33c7da05 720 rp = rport->dd_data;
853e2bd2
BG		 721
722 rc = fc_block_scsi_eh(sc_cmd);
723 if (rc)
724 return rc;
725
726 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
727 printk(KERN_ERR PFX "device_reset: link is not ready\n");
728 rc = FAILED;
729 goto tmf_err;
730 }
731 /* rport and tgt are allocated together, so tgt should be non-NULL */
732 tgt = (struct bnx2fc_rport *)&rp[1];
733
734 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
735 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
736 rc = FAILED;
737 goto tmf_err;
738 }
739retry_tmf:
740 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
741 if (!io_req) {
742 if (time_after(jiffies, start + HZ)) {
743 printk(KERN_ERR PFX "tmf: Failed TMF");
744 rc = FAILED;
745 goto tmf_err;
746 }
747 msleep(20);
748 goto retry_tmf;
749 }
750 /* Initialize rest of io_req fields */
751 io_req->sc_cmd = sc_cmd;
752 io_req->port = port;
753 io_req->tgt = tgt;
754
755 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
756
757 rc = bnx2fc_init_mp_req(io_req);
758 if (rc == FAILED) {
759 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
bd4d5de8 760 spin_lock_bh(&tgt->tgt_lock);
853e2bd2 761 kref_put(&io_req->refcount, bnx2fc_cmd_release);
bd4d5de8 762 spin_unlock_bh(&tgt->tgt_lock);
853e2bd2
BG		 763 goto tmf_err;
764 }
765
766 /* Set TM flags */
767 io_req->io_req_flags = 0;
768 tm_req->tm_flags = tm_flags;
769
770 /* Fill FCP_CMND */
771 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
772 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
773 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len);
774 fcp_cmnd->fc_dl = 0;
775
776 /* Fill FC header */
777 fc_hdr = &(tm_req->req_fc_hdr);
778 sid = tgt->sid;
779 did = rport->port_id;
780 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
781 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
782 FC_FC_SEQ_INIT, 0);
783 /* Obtain exchange id */
784 xid = io_req->xid;
785
786 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
787 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
788 index = xid % BNX2FC_TASKS_PER_PAGE;
789
790 /* Initialize task context for this IO request */
aea71a02
BPG		 791 task_page = (struct fcoe_task_ctx_entry *)
792 interface->hba->task_ctx[task_idx];
853e2bd2
BG		 793 task = &(task_page[index]);
794 bnx2fc_init_mp_task(io_req, task);
795
796 sc_cmd->SCp.ptr = (char *)io_req;
797
798 /* Obtain free SQ entry */
799 spin_lock_bh(&tgt->tgt_lock);
800 bnx2fc_add_2_sq(tgt, xid);
801
802 /* Enqueue the io_req to active_tm_queue */
803 io_req->on_tmf_queue = 1;
804 list_add_tail(&io_req->link, &tgt->active_tm_queue);
805
806 init_completion(&io_req->tm_done);
807 io_req->wait_for_comp = 1;
808
809 /* Ring doorbell */
810 bnx2fc_ring_doorbell(tgt);
811 spin_unlock_bh(&tgt->tgt_lock);
812
813 rc = wait_for_completion_timeout(&io_req->tm_done,
814 BNX2FC_TM_TIMEOUT * HZ);
815 spin_lock_bh(&tgt->tgt_lock);
816
817 io_req->wait_for_comp = 0;
92886c9c 818 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {
853e2bd2 819 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
92886c9c
BPG		 820 if (io_req->on_tmf_queue) {
821 list_del_init(&io_req->link);
822 io_req->on_tmf_queue = 0;
823 }
824 io_req->wait_for_comp = 1;
825 bnx2fc_initiate_cleanup(io_req);
826 spin_unlock_bh(&tgt->tgt_lock);
827 rc = wait_for_completion_timeout(&io_req->tm_done,
828 BNX2FC_FW_TIMEOUT);
829 spin_lock_bh(&tgt->tgt_lock);
830 io_req->wait_for_comp = 0;
831 if (!rc)
832 kref_put(&io_req->refcount, bnx2fc_cmd_release);
833 }
853e2bd2
BG		 834
835 spin_unlock_bh(&tgt->tgt_lock);
836
837 if (!rc) {
b2a554ff 838 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
853e2bd2
BG		 839 rc = FAILED;
840 } else {
b2a554ff 841 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
853e2bd2
BG		 842 rc = SUCCESS;
843 }
844tmf_err:
845 return rc;
846}
847
848int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
849{
850 struct fc_lport *lport;
851 struct bnx2fc_rport *tgt = io_req->tgt;
852 struct fc_rport *rport = tgt->rport;
853 struct fc_rport_priv *rdata = tgt->rdata;
aea71a02 854 struct bnx2fc_interface *interface;
853e2bd2
BG		 855 struct fcoe_port *port;
856 struct bnx2fc_cmd *abts_io_req;
857 struct fcoe_task_ctx_entry *task;
858 struct fcoe_task_ctx_entry *task_page;
859 struct fc_frame_header *fc_hdr;
860 struct bnx2fc_mp_req *abts_req;
861 int task_idx, index;
862 u32 sid, did;
863 u16 xid;
864 int rc = SUCCESS;
865 u32 r_a_tov = rdata->r_a_tov;
866
867 /* called with tgt_lock held */
868 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
869
870 port = io_req->port;
aea71a02 871 interface = port->priv;
853e2bd2
BG		 872 lport = port->lport;
873
874 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
875 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
876 rc = FAILED;
877 goto abts_err;
878 }
879
880 if (rport == NULL) {
b2a554ff 881 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
853e2bd2
BG		 882 rc = FAILED;
883 goto abts_err;
884 }
885
886 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
887 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
888 rc = FAILED;
889 goto abts_err;
890 }
891
892 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
893 if (!abts_io_req) {
894 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
895 rc = FAILED;
896 goto abts_err;
897 }
898
899 /* Initialize rest of io_req fields */
900 abts_io_req->sc_cmd = NULL;
901 abts_io_req->port = port;
902 abts_io_req->tgt = tgt;
903 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
904
905 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
906 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
907
908 /* Fill FC header */
909 fc_hdr = &(abts_req->req_fc_hdr);
910
911 /* Obtain oxid and rxid for the original exchange to be aborted */
912 fc_hdr->fh_ox_id = htons(io_req->xid);
619c5cb6 913 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
853e2bd2
BG		 914
915 sid = tgt->sid;
916 did = rport->port_id;
917
918 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
919 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
920 FC_FC_SEQ_INIT, 0);
921
922 xid = abts_io_req->xid;
923 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
924 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
925 index = xid % BNX2FC_TASKS_PER_PAGE;
926
927 /* Initialize task context for this IO request */
aea71a02
BPG		 928 task_page = (struct fcoe_task_ctx_entry *)
929 interface->hba->task_ctx[task_idx];
853e2bd2
BG		 930 task = &(task_page[index]);
931 bnx2fc_init_mp_task(abts_io_req, task);
932
933 /*
934 * ABTS task is a temporary task that will be cleaned up
935 * irrespective of ABTS response. We need to start the timer
936 * for the original exchange, as the CQE is posted for the original
937 * IO request.
938 *
939 * Timer for ABTS is started only when it is originated by a
940 * TM request. For the ABTS issued as part of ULP timeout,
941 * scsi-ml maintains the timers.
942 */
943
944 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
945 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
946
947 /* Obtain free SQ entry */
948 bnx2fc_add_2_sq(tgt, xid);
949
950 /* Ring doorbell */
951 bnx2fc_ring_doorbell(tgt);
952
953abts_err:
954 return rc;
955}
956
6c5a7ce4
BPG		 957int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
958 enum fc_rctl r_ctl)
959{
960 struct fc_lport *lport;
961 struct bnx2fc_rport *tgt = orig_io_req->tgt;
962 struct bnx2fc_interface *interface;
963 struct fcoe_port *port;
964 struct bnx2fc_cmd *seq_clnp_req;
965 struct fcoe_task_ctx_entry *task;
966 struct fcoe_task_ctx_entry *task_page;
967 struct bnx2fc_els_cb_arg *cb_arg = NULL;
968 int task_idx, index;
969 u16 xid;
970 int rc = 0;
971
972 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",
973 orig_io_req->xid);
974 kref_get(&orig_io_req->refcount);
975
976 port = orig_io_req->port;
977 interface = port->priv;
978 lport = port->lport;
979
980 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
981 if (!cb_arg) {
982 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
983 rc = -ENOMEM;
984 goto cleanup_err;
985 }
986
987 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
988 if (!seq_clnp_req) {
989 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
990 rc = -ENOMEM;
991 kfree(cb_arg);
992 goto cleanup_err;
993 }
994 /* Initialize rest of io_req fields */
995 seq_clnp_req->sc_cmd = NULL;
996 seq_clnp_req->port = port;
997 seq_clnp_req->tgt = tgt;
998 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
999
1000 xid = seq_clnp_req->xid;
1001
1002 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1003 index = xid % BNX2FC_TASKS_PER_PAGE;
1004
1005 /* Initialize task context for this IO request */
1006 task_page = (struct fcoe_task_ctx_entry *)
1007 interface->hba->task_ctx[task_idx];
1008 task = &(task_page[index]);
1009 cb_arg->aborted_io_req = orig_io_req;
1010 cb_arg->io_req = seq_clnp_req;
1011 cb_arg->r_ctl = r_ctl;
1012 cb_arg->offset = offset;
1013 seq_clnp_req->cb_arg = cb_arg;
1014
1015 printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
1016 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
1017
1018 /* Obtain free SQ entry */
1019 bnx2fc_add_2_sq(tgt, xid);
1020
1021 /* Ring doorbell */
1022 bnx2fc_ring_doorbell(tgt);
1023cleanup_err:
1024 return rc;
1025}
1026
853e2bd2
BG		 1027int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
1028{
1029 struct fc_lport *lport;
1030 struct bnx2fc_rport *tgt = io_req->tgt;
aea71a02 1031 struct bnx2fc_interface *interface;
853e2bd2
BG		 1032 struct fcoe_port *port;
1033 struct bnx2fc_cmd *cleanup_io_req;
1034 struct fcoe_task_ctx_entry *task;
1035 struct fcoe_task_ctx_entry *task_page;
1036 int task_idx, index;
1037 u16 xid, orig_xid;
1038 int rc = 0;
1039
1040 /* ASSUMPTION: called with tgt_lock held */
1041 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1042
1043 port = io_req->port;
aea71a02 1044 interface = port->priv;
853e2bd2
BG		 1045 lport = port->lport;
1046
1047 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1048 if (!cleanup_io_req) {
1049 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
1050 rc = -1;
1051 goto cleanup_err;
1052 }
1053
1054 /* Initialize rest of io_req fields */
1055 cleanup_io_req->sc_cmd = NULL;
1056 cleanup_io_req->port = port;
1057 cleanup_io_req->tgt = tgt;
1058 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1059
1060 xid = cleanup_io_req->xid;
1061
1062 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1063 index = xid % BNX2FC_TASKS_PER_PAGE;
1064
1065 /* Initialize task context for this IO request */
aea71a02
BPG		 1066 task_page = (struct fcoe_task_ctx_entry *)
1067 interface->hba->task_ctx[task_idx];
853e2bd2
BG		 1068 task = &(task_page[index]);
1069 orig_xid = io_req->xid;
1070
1071 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1072
1073 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1074
1075 /* Obtain free SQ entry */
1076 bnx2fc_add_2_sq(tgt, xid);
1077
1078 /* Ring doorbell */
1079 bnx2fc_ring_doorbell(tgt);
1080
1081cleanup_err:
1082 return rc;
1083}
1084
1085/**
1086 * bnx2fc_eh_target_reset: Reset a target
1087 *
1088 * @sc_cmd: SCSI command
1089 *
1090 * Set from SCSI host template to send task mgmt command to the target
1091 * and wait for the response
1092 */
1093int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
1094{
1095 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
1096}
1097
1098/**
1099 * bnx2fc_eh_device_reset - Reset a single LUN
1100 *
1101 * @sc_cmd: SCSI command
1102 *
1103 * Set from SCSI host template to send task mgmt command to the target
1104 * and wait for the response
1105 */
1106int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1107{
1108 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1109}
1110
c1bb4f33
BPG		 1111int bnx2fc_expl_logo(struct fc_lport *lport, struct bnx2fc_cmd *io_req)
1112{
1113 struct bnx2fc_rport *tgt = io_req->tgt;
1114 struct fc_rport_priv *rdata = tgt->rdata;
1115 int logo_issued;
1116 int rc = SUCCESS;
1117 int wait_cnt = 0;
1118
1119 BNX2FC_IO_DBG(io_req, "Expl logo - tgt flags = 0x%lx\n",
1120 tgt->flags);
1121 logo_issued = test_and_set_bit(BNX2FC_FLAG_EXPL_LOGO,
1122 &tgt->flags);
1123 io_req->wait_for_comp = 1;
1124 bnx2fc_initiate_cleanup(io_req);
1125
1126 spin_unlock_bh(&tgt->tgt_lock);
1127
1128 wait_for_completion(&io_req->tm_done);
1129
1130 io_req->wait_for_comp = 0;
1131 /*
1132 * release the reference taken in eh_abort to allow the
1133 * target to re-login after flushing IOs
1134 */
1135 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1136
1137 if (!logo_issued) {
1138 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
1139 mutex_lock(&lport->disc.disc_mutex);
1140 lport->tt.rport_logoff(rdata);
1141 mutex_unlock(&lport->disc.disc_mutex);
1142 do {
1143 msleep(BNX2FC_RELOGIN_WAIT_TIME);
1144 if (wait_cnt++ > BNX2FC_RELOGIN_WAIT_CNT) {
1145 rc = FAILED;
1146 break;
1147 }
1148 } while (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags));
1149 }
1150 spin_lock_bh(&tgt->tgt_lock);
1151 return rc;
1152}
853e2bd2
BG		 1153/**
1154 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1155 * SCSI command
1156 *
1157 * @sc_cmd: SCSI_ML command pointer
1158 *
1159 * SCSI abort request handler
1160 */
1161int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1162{
1163 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1164 struct fc_rport_libfc_priv *rp = rport->dd_data;
1165 struct bnx2fc_cmd *io_req;
1166 struct fc_lport *lport;
1167 struct bnx2fc_rport *tgt;
1168 int rc = FAILED;
1169
1170
1171 rc = fc_block_scsi_eh(sc_cmd);
1172 if (rc)
1173 return rc;
1174
1175 lport = shost_priv(sc_cmd->device->host);
1176 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
b2a554ff 1177 printk(KERN_ERR PFX "eh_abort: link not ready\n");
853e2bd2
BG		 1178 return rc;
1179 }
1180
1181 tgt = (struct bnx2fc_rport *)&rp[1];
1182
1183 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1184
1185 spin_lock_bh(&tgt->tgt_lock);
1186 io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1187 if (!io_req) {
1188 /* Command might have just completed */
1189 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1190 spin_unlock_bh(&tgt->tgt_lock);
1191 return SUCCESS;
1192 }
1193 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1194 io_req->refcount.refcount.counter);
1195
1196 /* Hold IO request across abort processing */
1197 kref_get(&io_req->refcount);
1198
1199 BUG_ON(tgt != io_req->tgt);
1200
1201 /* Remove the io_req from the active_q. */
1202 /*
1203 * Task Mgmt functions (LUN RESET & TGT RESET) will not
1204 * issue an ABTS on this particular IO req, as the
1205 * io_req is no longer in the active_q.
1206 */
1207 if (tgt->flush_in_prog) {
b2a554ff 1208 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
853e2bd2
BG		 1209 "flush in progress\n", io_req->xid);
1210 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1211 spin_unlock_bh(&tgt->tgt_lock);
1212 return SUCCESS;
1213 }
1214
1215 if (io_req->on_active_queue == 0) {
b2a554ff 1216 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
853e2bd2
BG		 1217 "not on active_q\n", io_req->xid);
1218 /*
1219 * This condition can happen only due to the FW bug,
1220 * where we do not receive cleanup response from
1221 * the FW. Handle this case gracefully by erroring
1222 * back the IO request to SCSI-ml
1223 */
1224 bnx2fc_scsi_done(io_req, DID_ABORT);
1225
1226 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1227 spin_unlock_bh(&tgt->tgt_lock);
1228 return SUCCESS;
1229 }
1230
1231 /*
1232 * Only eh_abort processing will remove the IO from
1233 * active_cmd_q before processing the request. this is
1234 * done to avoid race conditions between IOs aborted
1235 * as part of task management completion and eh_abort
1236 * processing
1237 */
1238 list_del_init(&io_req->link);
1239 io_req->on_active_queue = 0;
1240 /* Move IO req to retire queue */
1241 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1242
1243 init_completion(&io_req->tm_done);
853e2bd2 1244
c1bb4f33 1245 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
b2a554ff 1246 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
853e2bd2 1247 "already in abts processing\n", io_req->xid);
99cc600c
BPG		 1248 if (cancel_delayed_work(&io_req->timeout_work))
1249 kref_put(&io_req->refcount,
1250 bnx2fc_cmd_release); /* drop timer hold */
c1bb4f33 1251 rc = bnx2fc_expl_logo(lport, io_req);
21837896
EW		 1252 /* This only occurs when an task abort was requested while ABTS
1253 is in progress. Setting the IO_CLEANUP flag will skip the
1254 RRQ process in the case when the fw generated SCSI_CMD cmpl
1255 was a result from the ABTS request rather than the CLEANUP
1256 request */
1257 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
c1bb4f33
BPG		 1258 goto out;
1259 }
99cc600c 1260
c1bb4f33
BPG		 1261 /* Cancel the current timer running on this io_req */
1262 if (cancel_delayed_work(&io_req->timeout_work))
1263 kref_put(&io_req->refcount,
1264 bnx2fc_cmd_release); /* drop timer hold */
1265 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1266 io_req->wait_for_comp = 1;
1267 rc = bnx2fc_initiate_abts(io_req);
1268 if (rc == FAILED) {
1269 bnx2fc_initiate_cleanup(io_req);
99cc600c 1270 spin_unlock_bh(&tgt->tgt_lock);
99cc600c 1271 wait_for_completion(&io_req->tm_done);
99cc600c
BPG		 1272 spin_lock_bh(&tgt->tgt_lock);
1273 io_req->wait_for_comp = 0;
c1bb4f33 1274 goto done;
853e2bd2
BG		 1275 }
1276 spin_unlock_bh(&tgt->tgt_lock);
1277
1278 wait_for_completion(&io_req->tm_done);
1279
1280 spin_lock_bh(&tgt->tgt_lock);
1281 io_req->wait_for_comp = 0;
5d78f175
BPG		 1282 if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1283 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");
1284 rc = SUCCESS;
1285 } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1286 &io_req->req_flags))) {
853e2bd2
BG		 1287 /* Let the scsi-ml try to recover this command */
1288 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1289 io_req->xid);
c1bb4f33
BPG		 1290 rc = bnx2fc_expl_logo(lport, io_req);
1291 goto out;
853e2bd2
BG		 1292 } else {
1293 /*
1294 * We come here even when there was a race condition
1295 * between timeout and abts completion, and abts
1296 * completion happens just in time.
1297 */
1298 BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1299 rc = SUCCESS;
1300 bnx2fc_scsi_done(io_req, DID_ABORT);
1301 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1302 }
c1bb4f33 1303done:
853e2bd2
BG		 1304 /* release the reference taken in eh_abort */
1305 kref_put(&io_req->refcount, bnx2fc_cmd_release);
c1bb4f33 1306out:
853e2bd2
BG		 1307 spin_unlock_bh(&tgt->tgt_lock);
1308 return rc;
1309}
1310
6c5a7ce4
BPG		 1311void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
1312 struct fcoe_task_ctx_entry *task,
1313 u8 rx_state)
1314{
1315 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
1316 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
1317 u32 offset = cb_arg->offset;
1318 enum fc_rctl r_ctl = cb_arg->r_ctl;
1319 int rc = 0;
1320 struct bnx2fc_rport *tgt = orig_io_req->tgt;
1321
1322 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
1323 "cmd_type = %d\n",
1324 seq_clnp_req->xid, seq_clnp_req->cmd_type);
1325
1326 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
1327 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
1328 seq_clnp_req->xid);
1329 goto free_cb_arg;
1330 }
6c5a7ce4
BPG		 1331
1332 spin_unlock_bh(&tgt->tgt_lock);
1333 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
1334 spin_lock_bh(&tgt->tgt_lock);
1335
1336 if (rc)
1337 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
1338 " IO will abort\n");
1339 seq_clnp_req->cb_arg = NULL;
1340 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
1341free_cb_arg:
1342 kfree(cb_arg);
1343 return;
1344}
1345
853e2bd2
BG		 1346void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1347 struct fcoe_task_ctx_entry *task,
1348 u8 num_rq)
1349{
1350 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1351 "refcnt = %d, cmd_type = %d\n",
1352 io_req->refcount.refcount.counter, io_req->cmd_type);
1353 bnx2fc_scsi_done(io_req, DID_ERROR);
1354 kref_put(&io_req->refcount, bnx2fc_cmd_release);
99cc600c
BPG		 1355 if (io_req->wait_for_comp)
1356 complete(&io_req->tm_done);
853e2bd2
BG		 1357}
1358
1359void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1360 struct fcoe_task_ctx_entry *task,
1361 u8 num_rq)
1362{
1363 u32 r_ctl;
1364 u32 r_a_tov = FC_DEF_R_A_TOV;
1365 u8 issue_rrq = 0;
1366 struct bnx2fc_rport *tgt = io_req->tgt;
1367
1368 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1369 "refcnt = %d, cmd_type = %d\n",
1370 io_req->xid,
1371 io_req->refcount.refcount.counter, io_req->cmd_type);
1372
1373 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1374 &io_req->req_flags)) {
1375 BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1376 " this io\n");
1377 return;
1378 }
1379
1380 /* Do not issue RRQ as this IO is already cleanedup */
1381 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1382 &io_req->req_flags))
1383 goto io_compl;
1384
1385 /*
1386 * For ABTS issued due to SCSI eh_abort_handler, timeout
1387 * values are maintained by scsi-ml itself. Cancel timeout
1388 * in case ABTS issued as part of task management function
1389 * or due to FW error.
1390 */
1391 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1392 if (cancel_delayed_work(&io_req->timeout_work))
1393 kref_put(&io_req->refcount,
1394 bnx2fc_cmd_release); /* drop timer hold */
1395
619c5cb6 1396 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
853e2bd2
BG		 1397
1398 switch (r_ctl) {
1399 case FC_RCTL_BA_ACC:
1400 /*
1401 * Dont release this cmd yet. It will be relesed
1402 * after we get RRQ response
1403 */
1404 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1405 issue_rrq = 1;
1406 break;
1407
1408 case FC_RCTL_BA_RJT:
1409 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1410 break;
1411 default:
1412 printk(KERN_ERR PFX "Unknown ABTS response\n");
1413 break;
1414 }
1415
1416 if (issue_rrq) {
1417 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1418 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1419 }
1420 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1421 bnx2fc_cmd_timer_set(io_req, r_a_tov);
1422
1423io_compl:
1424 if (io_req->wait_for_comp) {
1425 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1426 &io_req->req_flags))
1427 complete(&io_req->tm_done);
1428 } else {
1429 /*
1430 * We end up here when ABTS is issued as
1431 * in asynchronous context, i.e., as part
1432 * of task management completion, or
1433 * when FW error is received or when the
1434 * ABTS is issued when the IO is timed
1435 * out.
1436 */
1437
1438 if (io_req->on_active_queue) {
1439 list_del_init(&io_req->link);
1440 io_req->on_active_queue = 0;
1441 /* Move IO req to retire queue */
1442 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1443 }
1444 bnx2fc_scsi_done(io_req, DID_ERROR);
1445 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1446 }
1447}
1448
1449static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1450{
1451 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1452 struct bnx2fc_rport *tgt = io_req->tgt;
d71fb3bd 1453 struct bnx2fc_cmd *cmd, *tmp;
9cb78c16
HR		 1454 u64 tm_lun = sc_cmd->device->lun;
1455 u64 lun;
853e2bd2 1456 int rc = 0;
853e2bd2
BG		 1457
1458 /* called with tgt_lock held */
1459 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1460 /*
1461 * Walk thru the active_ios queue and ABORT the IO
1462 * that matches with the LUN that was reset
1463 */
d71fb3bd 1464 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
853e2bd2 1465 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
853e2bd2
BG		 1466 lun = cmd->sc_cmd->device->lun;
1467 if (lun == tm_lun) {
1468 /* Initiate ABTS on this cmd */
1469 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1470 &cmd->req_flags)) {
1471 /* cancel the IO timeout */
1472 if (cancel_delayed_work(&io_req->timeout_work))
1473 kref_put(&io_req->refcount,
1474 bnx2fc_cmd_release);
1475 /* timer hold */
1476 rc = bnx2fc_initiate_abts(cmd);
25985edc 1477 /* abts shouldn't fail in this context */
853e2bd2
BG		 1478 WARN_ON(rc != SUCCESS);
1479 } else
1480 printk(KERN_ERR PFX "lun_rst: abts already in"
1481 " progress for this IO 0x%x\n",
1482 cmd->xid);
1483 }
1484 }
1485}
1486
1487static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1488{
1489 struct bnx2fc_rport *tgt = io_req->tgt;
d71fb3bd 1490 struct bnx2fc_cmd *cmd, *tmp;
853e2bd2
BG		 1491 int rc = 0;
1492
1493 /* called with tgt_lock held */
1494 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1495 /*
1496 * Walk thru the active_ios queue and ABORT the IO
1497 * that matches with the LUN that was reset
1498 */
d71fb3bd 1499 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
853e2bd2 1500 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
853e2bd2
BG		 1501 /* Initiate ABTS */
1502 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1503 &cmd->req_flags)) {
1504 /* cancel the IO timeout */
1505 if (cancel_delayed_work(&io_req->timeout_work))
1506 kref_put(&io_req->refcount,
1507 bnx2fc_cmd_release); /* timer hold */
1508 rc = bnx2fc_initiate_abts(cmd);
25985edc 1509 /* abts shouldn't fail in this context */
853e2bd2
BG		 1510 WARN_ON(rc != SUCCESS);
1511
1512 } else
1513 printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1514 " for this IO 0x%x\n", cmd->xid);
1515 }
1516}
1517
1518void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1519 struct fcoe_task_ctx_entry *task, u8 num_rq)
1520{
1521 struct bnx2fc_mp_req *tm_req;
1522 struct fc_frame_header *fc_hdr;
1523 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1524 u64 *hdr;
1525 u64 *temp_hdr;
1526 void *rsp_buf;
1527
1528 /* Called with tgt_lock held */
1529 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1530
1531 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1532 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1533 else {
1534 /* TM has already timed out and we got
1535 * delayed completion. Ignore completion
1536 * processing.
1537 */
1538 return;
1539 }
1540
1541 tm_req = &(io_req->mp_req);
1542 fc_hdr = &(tm_req->resp_fc_hdr);
1543 hdr = (u64 *)fc_hdr;
1544 temp_hdr = (u64 *)
619c5cb6 1545 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
853e2bd2
BG		 1546 hdr[0] = cpu_to_be64(temp_hdr[0]);
1547 hdr[1] = cpu_to_be64(temp_hdr[1]);
1548 hdr[2] = cpu_to_be64(temp_hdr[2]);
1549
619c5cb6
VZ		 1550 tm_req->resp_len =
1551 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
853e2bd2
BG		 1552
1553 rsp_buf = tm_req->resp_buf;
1554
1555 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1556 bnx2fc_parse_fcp_rsp(io_req,
1557 (struct fcoe_fcp_rsp_payload *)
1558 rsp_buf, num_rq);
1559 if (io_req->fcp_rsp_code == 0) {
1560 /* TM successful */
1561 if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1562 bnx2fc_lun_reset_cmpl(io_req);
1563 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1564 bnx2fc_tgt_reset_cmpl(io_req);
1565 }
1566 } else {
1567 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1568 fc_hdr->fh_r_ctl);
1569 }
1570 if (!sc_cmd->SCp.ptr) {
b2a554ff 1571 printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
853e2bd2
BG		 1572 return;
1573 }
1574 switch (io_req->fcp_status) {
1575 case FC_GOOD:
1576 if (io_req->cdb_status == 0) {
1577 /* Good IO completion */
1578 sc_cmd->result = DID_OK << 16;
1579 } else {
1580 /* Transport status is good, SCSI status not good */
1581 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1582 }
1583 if (io_req->fcp_resid)
1584 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1585 break;
1586
1587 default:
1588 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1589 io_req->fcp_status);
1590 break;
1591 }
1592
1593 sc_cmd = io_req->sc_cmd;
1594 io_req->sc_cmd = NULL;
1595
1596 /* check if the io_req exists in tgt's tmf_q */
1597 if (io_req->on_tmf_queue) {
1598
1599 list_del_init(&io_req->link);
1600 io_req->on_tmf_queue = 0;
1601 } else {
1602
b2a554ff 1603 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
853e2bd2
BG		 1604 return;
1605 }
1606
1607 sc_cmd->SCp.ptr = NULL;
1608 sc_cmd->scsi_done(sc_cmd);
1609
1610 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1611 if (io_req->wait_for_comp) {
1612 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1613 complete(&io_req->tm_done);
1614 }
1615}
1616
1617static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1618 int bd_index)
1619{
1620 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1621 int frag_size, sg_frags;
1622
1623 sg_frags = 0;
1624 while (sg_len) {
1625 if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1626 frag_size = BNX2FC_BD_SPLIT_SZ;
1627 else
1628 frag_size = sg_len;
1629 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1630 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;
1631 bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1632 bd[bd_index + sg_frags].flags = 0;
1633
1634 addr += (u64) frag_size;
1635 sg_frags++;
1636 sg_len -= frag_size;
1637 }
1638 return sg_frags;
1639
1640}
1641
1642static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1643{
3ce41ea1
BPG		 1644 struct bnx2fc_interface *interface = io_req->port->priv;
1645 struct bnx2fc_hba *hba = interface->hba;
853e2bd2
BG		 1646 struct scsi_cmnd *sc = io_req->sc_cmd;
1647 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1648 struct scatterlist *sg;
1649 int byte_count = 0;
1650 int sg_count = 0;
1651 int bd_count = 0;
1652 int sg_frags;
1653 unsigned int sg_len;
1654 u64 addr;
1655 int i;
1656
5565461e
CD		 1657 /*
1658 * Use dma_map_sg directly to ensure we're using the correct
1659 * dev struct off of pcidev.
1660 */
3ce41ea1
BPG		 1661 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
1662 scsi_sg_count(sc), sc->sc_data_direction);
853e2bd2
BG		 1663 scsi_for_each_sg(sc, sg, sg_count, i) {
1664 sg_len = sg_dma_len(sg);
1665 addr = sg_dma_address(sg);
1666 if (sg_len > BNX2FC_MAX_BD_LEN) {
1667 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1668 bd_count);
1669 } else {
1670
1671 sg_frags = 1;
1672 bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1673 bd[bd_count].buf_addr_hi = addr >> 32;
1674 bd[bd_count].buf_len = (u16)sg_len;
1675 bd[bd_count].flags = 0;
1676 }
1677 bd_count += sg_frags;
1678 byte_count += sg_len;
1679 }
1680 if (byte_count != scsi_bufflen(sc))
1681 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1682 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1683 io_req->xid);
1684 return bd_count;
1685}
1686
822f2903 1687static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
853e2bd2
BG		 1688{
1689 struct scsi_cmnd *sc = io_req->sc_cmd;
1690 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1691 int bd_count;
1692
822f2903 1693 if (scsi_sg_count(sc)) {
853e2bd2 1694 bd_count = bnx2fc_map_sg(io_req);
822f2903
BPG		 1695 if (bd_count == 0)
1696 return -ENOMEM;
1697 } else {
853e2bd2
BG		 1698 bd_count = 0;
1699 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1700 bd[0].buf_len = bd[0].flags = 0;
1701 }
1702 io_req->bd_tbl->bd_valid = bd_count;
822f2903
BPG		 1703
1704 return 0;
853e2bd2
BG		 1705}
1706
1707static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1708{
1709 struct scsi_cmnd *sc = io_req->sc_cmd;
5565461e
CD		 1710 struct bnx2fc_interface *interface = io_req->port->priv;
1711 struct bnx2fc_hba *hba = interface->hba;
853e2bd2 1712
5565461e
CD		 1713 /*
1714 * Use dma_unmap_sg directly to ensure we're using the correct
1715 * dev struct off of pcidev.
1716 */
1717 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
1718 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),
1719 scsi_sg_count(sc), sc->sc_data_direction);
853e2bd2
BG		 1720 io_req->bd_tbl->bd_valid = 0;
1721 }
1722}
1723
1724void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1725 struct fcp_cmnd *fcp_cmnd)
1726{
1727 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
853e2bd2
BG		 1728
1729 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1730
e35fa8c2 1731 int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
853e2bd2
BG		 1732
1733 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1734 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1735
1736 fcp_cmnd->fc_cmdref = 0;
1737 fcp_cmnd->fc_pri_ta = 0;
1738 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1739 fcp_cmnd->fc_flags = io_req->io_req_flags;
ea6bb33e 1740 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
853e2bd2
BG		 1741}
1742
1743static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1744 struct fcoe_fcp_rsp_payload *fcp_rsp,
1745 u8 num_rq)
1746{
1747 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1748 struct bnx2fc_rport *tgt = io_req->tgt;
1749 u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1750 u32 rq_buff_len = 0;
1751 int i;
1752 unsigned char *rq_data;
1753 unsigned char *dummy;
1754 int fcp_sns_len = 0;
1755 int fcp_rsp_len = 0;
1756
1757 io_req->fcp_status = FC_GOOD;
1758 io_req->fcp_resid = fcp_rsp->fcp_resid;
1759
1760 io_req->scsi_comp_flags = rsp_flags;
1761 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1762 fcp_rsp->scsi_status_code;
1763
1764 /* Fetch fcp_rsp_info and fcp_sns_info if available */
1765 if (num_rq) {
1766
1767 /*
1768 * We do not anticipate num_rq >1, as the linux defined
1769 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1770 * 256 bytes of single rq buffer is good enough to hold this.
1771 */
1772
1773 if (rsp_flags &
1774 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1775 fcp_rsp_len = rq_buff_len
1776 = fcp_rsp->fcp_rsp_len;
1777 }
1778
1779 if (rsp_flags &
1780 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1781 fcp_sns_len = fcp_rsp->fcp_sns_len;
1782 rq_buff_len += fcp_rsp->fcp_sns_len;
1783 }
1784
1785 io_req->fcp_rsp_len = fcp_rsp_len;
1786 io_req->fcp_sns_len = fcp_sns_len;
1787
1788 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1789 /* Invalid sense sense length. */
b2a554ff 1790 printk(KERN_ERR PFX "invalid sns length %d\n",
853e2bd2
BG		 1791 rq_buff_len);
1792 /* reset rq_buff_len */
1793 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;
1794 }
1795
1796 rq_data = bnx2fc_get_next_rqe(tgt, 1);
1797
1798 if (num_rq > 1) {
1799 /* We do not need extra sense data */
1800 for (i = 1; i < num_rq; i++)
1801 dummy = bnx2fc_get_next_rqe(tgt, 1);
1802 }
1803
1804 /* fetch fcp_rsp_code */
1805 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1806 /* Only for task management function */
1807 io_req->fcp_rsp_code = rq_data[3];
1808 printk(KERN_ERR PFX "fcp_rsp_code = %d\n",
1809 io_req->fcp_rsp_code);
1810 }
1811
1812 /* fetch sense data */
1813 rq_data += fcp_rsp_len;
1814
1815 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1816 printk(KERN_ERR PFX "Truncating sense buffer\n");
1817 fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1818 }
1819
16da05b1 1820 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
853e2bd2
BG		 1821 if (fcp_sns_len)
1822 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1823
1824 /* return RQ entries */
1825 for (i = 0; i < num_rq; i++)
1826 bnx2fc_return_rqe(tgt, 1);
1827 }
1828}
1829
1830/**
1831 * bnx2fc_queuecommand - Queuecommand function of the scsi template
1832 *
1833 * @host: The Scsi_Host the command was issued to
1834 * @sc_cmd: struct scsi_cmnd to be executed
1835 *
1836 * This is the IO strategy routine, called by SCSI-ML
1837 **/
1838int bnx2fc_queuecommand(struct Scsi_Host *host,
1839 struct scsi_cmnd *sc_cmd)
1840{
1841 struct fc_lport *lport = shost_priv(host);
1842 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1843 struct fc_rport_libfc_priv *rp = rport->dd_data;
1844 struct bnx2fc_rport *tgt;
1845 struct bnx2fc_cmd *io_req;
1846 int rc = 0;
1847 int rval;
1848
1849 rval = fc_remote_port_chkready(rport);
1850 if (rval) {
1851 sc_cmd->result = rval;
1852 sc_cmd->scsi_done(sc_cmd);
1853 return 0;
1854 }
1855
1856 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1857 rc = SCSI_MLQUEUE_HOST_BUSY;
1858 goto exit_qcmd;
1859 }
1860
1861 /* rport and tgt are allocated together, so tgt should be non-NULL */
1862 tgt = (struct bnx2fc_rport *)&rp[1];
1863
1864 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1865 /*
1866 * Session is not offloaded yet. Let SCSI-ml retry
1867 * the command.
1868 */
1869 rc = SCSI_MLQUEUE_TARGET_BUSY;
1870 goto exit_qcmd;
1871 }
245a5754
EW		 1872 if (tgt->retry_delay_timestamp) {
1873 if (time_after(jiffies, tgt->retry_delay_timestamp)) {
1874 tgt->retry_delay_timestamp = 0;
1875 } else {
1876 /* If retry_delay timer is active, flow off the ML */
1877 rc = SCSI_MLQUEUE_TARGET_BUSY;
1878 goto exit_qcmd;
1879 }
1880 }
dc6311dd
ML		 1881
1882 spin_lock_bh(&tgt->tgt_lock);
1883
853e2bd2
BG		 1884 io_req = bnx2fc_cmd_alloc(tgt);
1885 if (!io_req) {
1886 rc = SCSI_MLQUEUE_HOST_BUSY;
dc6311dd 1887 goto exit_qcmd_tgtlock;
853e2bd2
BG		 1888 }
1889 io_req->sc_cmd = sc_cmd;
1890
1891 if (bnx2fc_post_io_req(tgt, io_req)) {
1892 printk(KERN_ERR PFX "Unable to post io_req\n");
1893 rc = SCSI_MLQUEUE_HOST_BUSY;
dc6311dd 1894 goto exit_qcmd_tgtlock;
853e2bd2 1895 }
dc6311dd
ML		 1896
1897exit_qcmd_tgtlock:
1898 spin_unlock_bh(&tgt->tgt_lock);
853e2bd2
BG		 1899exit_qcmd:
1900 return rc;
1901}
1902
1903void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1904 struct fcoe_task_ctx_entry *task,
1905 u8 num_rq)
1906{
1907 struct fcoe_fcp_rsp_payload *fcp_rsp;
1908 struct bnx2fc_rport *tgt = io_req->tgt;
1909 struct scsi_cmnd *sc_cmd;
1910 struct Scsi_Host *host;
1911
1912
1913 /* scsi_cmd_cmpl is called with tgt lock held */
1914
1915 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1916 /* we will not receive ABTS response for this IO */
1917 BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1918 "this scsi cmd\n");
1919 }
1920
1921 /* Cancel the timeout_work, as we received IO completion */
1922 if (cancel_delayed_work(&io_req->timeout_work))
1923 kref_put(&io_req->refcount,
1924 bnx2fc_cmd_release); /* drop timer hold */
1925
1926 sc_cmd = io_req->sc_cmd;
1927 if (sc_cmd == NULL) {
1928 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1929 return;
1930 }
1931
1932 /* Fetch fcp_rsp from task context and perform cmd completion */
1933 fcp_rsp = (struct fcoe_fcp_rsp_payload *)
619c5cb6 1934 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
853e2bd2
BG		 1935
1936 /* parse fcp_rsp and obtain sense data from RQ if available */
1937 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
1938
1939 host = sc_cmd->device->host;
1940 if (!sc_cmd->SCp.ptr) {
1941 printk(KERN_ERR PFX "SCp.ptr is NULL\n");
1942 return;
1943 }
853e2bd2
BG		 1944
1945 if (io_req->on_active_queue) {
1946 list_del_init(&io_req->link);
1947 io_req->on_active_queue = 0;
1948 /* Move IO req to retire queue */
1949 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1950 } else {
1951 /* This should not happen, but could have been pulled
1952 * by bnx2fc_flush_active_ios(), or during a race
1953 * between command abort and (late) completion.
1954 */
1955 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
1956 if (io_req->wait_for_comp)
1957 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1958 &io_req->req_flags))
1959 complete(&io_req->tm_done);
1960 }
1961
1962 bnx2fc_unmap_sg_list(io_req);
b5a95fe7 1963 io_req->sc_cmd = NULL;
853e2bd2
BG		 1964
1965 switch (io_req->fcp_status) {
1966 case FC_GOOD:
1967 if (io_req->cdb_status == 0) {
1968 /* Good IO completion */
1969 sc_cmd->result = DID_OK << 16;
1970 } else {
1971 /* Transport status is good, SCSI status not good */
1972 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1973 " fcp_resid = 0x%x\n",
1974 io_req->cdb_status, io_req->fcp_resid);
1975 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
245a5754
EW		 1976
1977 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
1978 io_req->cdb_status == SAM_STAT_BUSY) {
1979 /* Set the jiffies + retry_delay_timer * 100ms
1980 for the rport/tgt */
1981 tgt->retry_delay_timestamp = jiffies +
1982 fcp_rsp->retry_delay_timer * HZ / 10;
1983 }
1984
853e2bd2
BG		 1985 }
1986 if (io_req->fcp_resid)
1987 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1988 break;
1989 default:
b2a554ff 1990 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",
853e2bd2
BG		 1991 io_req->fcp_status);
1992 break;
1993 }
1994 sc_cmd->SCp.ptr = NULL;
1995 sc_cmd->scsi_done(sc_cmd);
1996 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1997}
1998
74446954 1999int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
853e2bd2
BG		 2000 struct bnx2fc_cmd *io_req)
2001{
2002 struct fcoe_task_ctx_entry *task;
2003 struct fcoe_task_ctx_entry *task_page;
2004 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
2005 struct fcoe_port *port = tgt->port;
aea71a02
BPG		 2006 struct bnx2fc_interface *interface = port->priv;
2007 struct bnx2fc_hba *hba = interface->hba;
853e2bd2 2008 struct fc_lport *lport = port->lport;
1bd49b48 2009 struct fc_stats *stats;
853e2bd2
BG		 2010 int task_idx, index;
2011 u16 xid;
2012
dc6311dd
ML		 2013 /* bnx2fc_post_io_req() is called with the tgt_lock held */
2014
853e2bd2
BG		 2015 /* Initialize rest of io_req fields */
2016 io_req->cmd_type = BNX2FC_SCSI_CMD;
2017 io_req->port = port;
2018 io_req->tgt = tgt;
2019 io_req->data_xfer_len = scsi_bufflen(sc_cmd);
2020 sc_cmd->SCp.ptr = (char *)io_req;
2021
1bd49b48 2022 stats = per_cpu_ptr(lport->stats, get_cpu());
853e2bd2
BG		 2023 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
2024 io_req->io_req_flags = BNX2FC_READ;
2025 stats->InputRequests++;
2026 stats->InputBytes += io_req->data_xfer_len;
2027 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
2028 io_req->io_req_flags = BNX2FC_WRITE;
2029 stats->OutputRequests++;
2030 stats->OutputBytes += io_req->data_xfer_len;
2031 } else {
2032 io_req->io_req_flags = 0;
2033 stats->ControlRequests++;
2034 }
2035 put_cpu();
2036
2037 xid = io_req->xid;
2038
2039 /* Build buffer descriptor list for firmware from sg list */
822f2903
BPG		 2040 if (bnx2fc_build_bd_list_from_sg(io_req)) {
2041 printk(KERN_ERR PFX "BD list creation failed\n");
822f2903 2042 kref_put(&io_req->refcount, bnx2fc_cmd_release);
822f2903
BPG		 2043 return -EAGAIN;
2044 }
853e2bd2
BG		 2045
2046 task_idx = xid / BNX2FC_TASKS_PER_PAGE;
2047 index = xid % BNX2FC_TASKS_PER_PAGE;
2048
2049 /* Initialize task context for this IO request */
2050 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
2051 task = &(task_page[index]);
2052 bnx2fc_init_task(io_req, task);
2053
853e2bd2
BG		 2054 if (tgt->flush_in_prog) {
2055 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
2056 kref_put(&io_req->refcount, bnx2fc_cmd_release);
853e2bd2
BG		 2057 return -EAGAIN;
2058 }
2059
2060 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
2061 printk(KERN_ERR PFX "Session not ready...post_io\n");
2062 kref_put(&io_req->refcount, bnx2fc_cmd_release);
853e2bd2
BG		 2063 return -EAGAIN;
2064 }
2065
2066 /* Time IO req */
b252f4c7
BPG		 2067 if (tgt->io_timeout)
2068 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
853e2bd2
BG		 2069 /* Obtain free SQ entry */
2070 bnx2fc_add_2_sq(tgt, xid);
2071
2072 /* Enqueue the io_req to active_cmd_queue */
2073
2074 io_req->on_active_queue = 1;
2075 /* move io_req from pending_queue to active_queue */
2076 list_add_tail(&io_req->link, &tgt->active_cmd_queue);
2077
2078 /* Ring doorbell */
2079 bnx2fc_ring_doorbell(tgt);
853e2bd2
BG		 2080 return 0;
2081}
Linux 6.x block layer and io_uring tree(s)