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ocfs2: fix several issues of append dio
[linux/fpc-iii.git] / drivers / scsi / bnx2fc / bnx2fc_els.c
blobef355c13ccc47c9a9f05cde438408e4e56b3eb3d
1 /*
2 * bnx2fc_els.c: QLogic NetXtreme II Linux FCoE offload driver.
3 * This file contains helper routines that handle ELS requests
4 * and responses.
5 *
6 * Copyright (c) 2008 - 2013 Broadcom Corporation
7 * Copyright (c) 2014, QLogic Corporation
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation.
12 *
13 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
14 */
15
16 #include "bnx2fc.h"
17
18 static void bnx2fc_logo_resp(struct fc_seq *seq, struct fc_frame *fp,
19 void *arg);
20 static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
21 void *arg);
22 static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op,
23 void *data, u32 data_len,
24 void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg),
25 struct bnx2fc_els_cb_arg *cb_arg, u32 timer_msec);
26
27 static void bnx2fc_rrq_compl(struct bnx2fc_els_cb_arg *cb_arg)
28 {
29 struct bnx2fc_cmd *orig_io_req;
30 struct bnx2fc_cmd *rrq_req;
31 int rc = 0;
32
33 BUG_ON(!cb_arg);
34 rrq_req = cb_arg->io_req;
35 orig_io_req = cb_arg->aborted_io_req;
36 BUG_ON(!orig_io_req);
37 BNX2FC_ELS_DBG("rrq_compl: orig xid = 0x%x, rrq_xid = 0x%x\n",
38 orig_io_req->xid, rrq_req->xid);
39
40 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
41
42 if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rrq_req->req_flags)) {
43 /*
44 * els req is timed out. cleanup the IO with FW and
45 * drop the completion. Remove from active_cmd_queue.
46 */
47 BNX2FC_ELS_DBG("rrq xid - 0x%x timed out, clean it up\n",
48 rrq_req->xid);
49
50 if (rrq_req->on_active_queue) {
51 list_del_init(&rrq_req->link);
52 rrq_req->on_active_queue = 0;
53 rc = bnx2fc_initiate_cleanup(rrq_req);
54 BUG_ON(rc);
55 }
56 }
57 kfree(cb_arg);
58 }
59 int bnx2fc_send_rrq(struct bnx2fc_cmd *aborted_io_req)
60 {
61
62 struct fc_els_rrq rrq;
63 struct bnx2fc_rport *tgt = aborted_io_req->tgt;
64 struct fc_lport *lport = tgt->rdata->local_port;
65 struct bnx2fc_els_cb_arg *cb_arg = NULL;
66 u32 sid = tgt->sid;
67 u32 r_a_tov = lport->r_a_tov;
68 unsigned long start = jiffies;
69 int rc;
70
71 BNX2FC_ELS_DBG("Sending RRQ orig_xid = 0x%x\n",
72 aborted_io_req->xid);
73 memset(&rrq, 0, sizeof(rrq));
74
75 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_NOIO);
76 if (!cb_arg) {
77 printk(KERN_ERR PFX "Unable to allocate cb_arg for RRQ\n");
78 rc = -ENOMEM;
79 goto rrq_err;
80 }
81
82 cb_arg->aborted_io_req = aborted_io_req;
83
84 rrq.rrq_cmd = ELS_RRQ;
85 hton24(rrq.rrq_s_id, sid);
86 rrq.rrq_ox_id = htons(aborted_io_req->xid);
87 rrq.rrq_rx_id = htons(aborted_io_req->task->rxwr_txrd.var_ctx.rx_id);
88
89 retry_rrq:
90 rc = bnx2fc_initiate_els(tgt, ELS_RRQ, &rrq, sizeof(rrq),
91 bnx2fc_rrq_compl, cb_arg,
92 r_a_tov);
93 if (rc == -ENOMEM) {
94 if (time_after(jiffies, start + (10 * HZ))) {
95 BNX2FC_ELS_DBG("rrq Failed\n");
96 rc = FAILED;
97 goto rrq_err;
98 }
99 msleep(20);
100 goto retry_rrq;
101 }
102 rrq_err:
103 if (rc) {
104 BNX2FC_ELS_DBG("RRQ failed - release orig io req 0x%x\n",
105 aborted_io_req->xid);
106 kfree(cb_arg);
107 spin_lock_bh(&tgt->tgt_lock);
108 kref_put(&aborted_io_req->refcount, bnx2fc_cmd_release);
109 spin_unlock_bh(&tgt->tgt_lock);
110 }
111 return rc;
112 }
113
114 static void bnx2fc_l2_els_compl(struct bnx2fc_els_cb_arg *cb_arg)
115 {
116 struct bnx2fc_cmd *els_req;
117 struct bnx2fc_rport *tgt;
118 struct bnx2fc_mp_req *mp_req;
119 struct fc_frame_header *fc_hdr;
120 unsigned char *buf;
121 void *resp_buf;
122 u32 resp_len, hdr_len;
123 u16 l2_oxid;
124 int frame_len;
125 int rc = 0;
126
127 l2_oxid = cb_arg->l2_oxid;
128 BNX2FC_ELS_DBG("ELS COMPL - l2_oxid = 0x%x\n", l2_oxid);
129
130 els_req = cb_arg->io_req;
131 if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &els_req->req_flags)) {
132 /*
133 * els req is timed out. cleanup the IO with FW and
134 * drop the completion. libfc will handle the els timeout
135 */
136 if (els_req->on_active_queue) {
137 list_del_init(&els_req->link);
138 els_req->on_active_queue = 0;
139 rc = bnx2fc_initiate_cleanup(els_req);
140 BUG_ON(rc);
141 }
142 goto free_arg;
143 }
144
145 tgt = els_req->tgt;
146 mp_req = &(els_req->mp_req);
147 fc_hdr = &(mp_req->resp_fc_hdr);
148 resp_len = mp_req->resp_len;
149 resp_buf = mp_req->resp_buf;
150
151 buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
152 if (!buf) {
153 printk(KERN_ERR PFX "Unable to alloc mp buf\n");
154 goto free_arg;
155 }
156 hdr_len = sizeof(*fc_hdr);
157 if (hdr_len + resp_len > PAGE_SIZE) {
158 printk(KERN_ERR PFX "l2_els_compl: resp len is "
159 "beyond page size\n");
160 goto free_buf;
161 }
162 memcpy(buf, fc_hdr, hdr_len);
163 memcpy(buf + hdr_len, resp_buf, resp_len);
164 frame_len = hdr_len + resp_len;
165
166 bnx2fc_process_l2_frame_compl(tgt, buf, frame_len, l2_oxid);
167
168 free_buf:
169 kfree(buf);
170 free_arg:
171 kfree(cb_arg);
172 }
173
174 int bnx2fc_send_adisc(struct bnx2fc_rport *tgt, struct fc_frame *fp)
175 {
176 struct fc_els_adisc *adisc;
177 struct fc_frame_header *fh;
178 struct bnx2fc_els_cb_arg *cb_arg;
179 struct fc_lport *lport = tgt->rdata->local_port;
180 u32 r_a_tov = lport->r_a_tov;
181 int rc;
182
183 fh = fc_frame_header_get(fp);
184 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
185 if (!cb_arg) {
186 printk(KERN_ERR PFX "Unable to allocate cb_arg for ADISC\n");
187 return -ENOMEM;
188 }
189
190 cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
191
192 BNX2FC_ELS_DBG("send ADISC: l2_oxid = 0x%x\n", cb_arg->l2_oxid);
193 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
194 /* adisc is initialized by libfc */
195 rc = bnx2fc_initiate_els(tgt, ELS_ADISC, adisc, sizeof(*adisc),
196 bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
197 if (rc)
198 kfree(cb_arg);
199 return rc;
200 }
201
202 int bnx2fc_send_logo(struct bnx2fc_rport *tgt, struct fc_frame *fp)
203 {
204 struct fc_els_logo *logo;
205 struct fc_frame_header *fh;
206 struct bnx2fc_els_cb_arg *cb_arg;
207 struct fc_lport *lport = tgt->rdata->local_port;
208 u32 r_a_tov = lport->r_a_tov;
209 int rc;
210
211 fh = fc_frame_header_get(fp);
212 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
213 if (!cb_arg) {
214 printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n");
215 return -ENOMEM;
216 }
217
218 cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
219
220 BNX2FC_ELS_DBG("Send LOGO: l2_oxid = 0x%x\n", cb_arg->l2_oxid);
221 logo = fc_frame_payload_get(fp, sizeof(*logo));
222 /* logo is initialized by libfc */
223 rc = bnx2fc_initiate_els(tgt, ELS_LOGO, logo, sizeof(*logo),
224 bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
225 if (rc)
226 kfree(cb_arg);
227 return rc;
228 }
229
230 int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp)
231 {
232 struct fc_els_rls *rls;
233 struct fc_frame_header *fh;
234 struct bnx2fc_els_cb_arg *cb_arg;
235 struct fc_lport *lport = tgt->rdata->local_port;
236 u32 r_a_tov = lport->r_a_tov;
237 int rc;
238
239 fh = fc_frame_header_get(fp);
240 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
241 if (!cb_arg) {
242 printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n");
243 return -ENOMEM;
244 }
245
246 cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
247
248 rls = fc_frame_payload_get(fp, sizeof(*rls));
249 /* rls is initialized by libfc */
250 rc = bnx2fc_initiate_els(tgt, ELS_RLS, rls, sizeof(*rls),
251 bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
252 if (rc)
253 kfree(cb_arg);
254 return rc;
255 }
256
257 void bnx2fc_srr_compl(struct bnx2fc_els_cb_arg *cb_arg)
258 {
259 struct bnx2fc_mp_req *mp_req;
260 struct fc_frame_header *fc_hdr, *fh;
261 struct bnx2fc_cmd *srr_req;
262 struct bnx2fc_cmd *orig_io_req;
263 struct fc_frame *fp;
264 unsigned char *buf;
265 void *resp_buf;
266 u32 resp_len, hdr_len;
267 u8 opcode;
268 int rc = 0;
269
270 orig_io_req = cb_arg->aborted_io_req;
271 srr_req = cb_arg->io_req;
272 if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &srr_req->req_flags)) {
273 /* SRR timedout */
274 BNX2FC_IO_DBG(srr_req, "srr timed out, abort "
275 "orig_io - 0x%x\n",
276 orig_io_req->xid);
277 rc = bnx2fc_initiate_abts(srr_req);
278 if (rc != SUCCESS) {
279 BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
280 "failed. issue cleanup\n");
281 bnx2fc_initiate_cleanup(srr_req);
282 }
283 if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags) ||
284 test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
285 BNX2FC_IO_DBG(srr_req, "srr_compl:xid 0x%x flags = %lx",
286 orig_io_req->xid, orig_io_req->req_flags);
287 goto srr_compl_done;
288 }
289 orig_io_req->srr_retry++;
290 if (orig_io_req->srr_retry <= SRR_RETRY_COUNT) {
291 struct bnx2fc_rport *tgt = orig_io_req->tgt;
292 spin_unlock_bh(&tgt->tgt_lock);
293 rc = bnx2fc_send_srr(orig_io_req,
294 orig_io_req->srr_offset,
295 orig_io_req->srr_rctl);
296 spin_lock_bh(&tgt->tgt_lock);
297 if (!rc)
298 goto srr_compl_done;
299 }
300
301 rc = bnx2fc_initiate_abts(orig_io_req);
302 if (rc != SUCCESS) {
303 BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
304 "failed xid = 0x%x. issue cleanup\n",
305 orig_io_req->xid);
306 bnx2fc_initiate_cleanup(orig_io_req);
307 }
308 goto srr_compl_done;
309 }
310 if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags) ||
311 test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
312 BNX2FC_IO_DBG(srr_req, "srr_compl:xid - 0x%x flags = %lx",
313 orig_io_req->xid, orig_io_req->req_flags);
314 goto srr_compl_done;
315 }
316 mp_req = &(srr_req->mp_req);
317 fc_hdr = &(mp_req->resp_fc_hdr);
318 resp_len = mp_req->resp_len;
319 resp_buf = mp_req->resp_buf;
320
321 hdr_len = sizeof(*fc_hdr);
322 buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
323 if (!buf) {
324 printk(KERN_ERR PFX "srr buf: mem alloc failure\n");
325 goto srr_compl_done;
326 }
327 memcpy(buf, fc_hdr, hdr_len);
328 memcpy(buf + hdr_len, resp_buf, resp_len);
329
330 fp = fc_frame_alloc(NULL, resp_len);
331 if (!fp) {
332 printk(KERN_ERR PFX "fc_frame_alloc failure\n");
333 goto free_buf;
334 }
335
336 fh = (struct fc_frame_header *) fc_frame_header_get(fp);
337 /* Copy FC Frame header and payload into the frame */
338 memcpy(fh, buf, hdr_len + resp_len);
339
340 opcode = fc_frame_payload_op(fp);
341 switch (opcode) {
342 case ELS_LS_ACC:
343 BNX2FC_IO_DBG(srr_req, "SRR success\n");
344 break;
345 case ELS_LS_RJT:
346 BNX2FC_IO_DBG(srr_req, "SRR rejected\n");
347 rc = bnx2fc_initiate_abts(orig_io_req);
348 if (rc != SUCCESS) {
349 BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
350 "failed xid = 0x%x. issue cleanup\n",
351 orig_io_req->xid);
352 bnx2fc_initiate_cleanup(orig_io_req);
353 }
354 break;
355 default:
356 BNX2FC_IO_DBG(srr_req, "srr compl - invalid opcode = %d\n",
357 opcode);
358 break;
359 }
360 fc_frame_free(fp);
361 free_buf:
362 kfree(buf);
363 srr_compl_done:
364 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
365 }
366
367 void bnx2fc_rec_compl(struct bnx2fc_els_cb_arg *cb_arg)
368 {
369 struct bnx2fc_cmd *orig_io_req, *new_io_req;
370 struct bnx2fc_cmd *rec_req;
371 struct bnx2fc_mp_req *mp_req;
372 struct fc_frame_header *fc_hdr, *fh;
373 struct fc_els_ls_rjt *rjt;
374 struct fc_els_rec_acc *acc;
375 struct bnx2fc_rport *tgt;
376 struct fcoe_err_report_entry *err_entry;
377 struct scsi_cmnd *sc_cmd;
378 enum fc_rctl r_ctl;
379 unsigned char *buf;
380 void *resp_buf;
381 struct fc_frame *fp;
382 u8 opcode;
383 u32 offset;
384 u32 e_stat;
385 u32 resp_len, hdr_len;
386 int rc = 0;
387 bool send_seq_clnp = false;
388 bool abort_io = false;
389
390 BNX2FC_MISC_DBG("Entered rec_compl callback\n");
391 rec_req = cb_arg->io_req;
392 orig_io_req = cb_arg->aborted_io_req;
393 BNX2FC_IO_DBG(rec_req, "rec_compl: orig xid = 0x%x", orig_io_req->xid);
394 tgt = orig_io_req->tgt;
395
396 /* Handle REC timeout case */
397 if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rec_req->req_flags)) {
398 BNX2FC_IO_DBG(rec_req, "timed out, abort "
399 "orig_io - 0x%x\n",
400 orig_io_req->xid);
401 /* els req is timed out. send abts for els */
402 rc = bnx2fc_initiate_abts(rec_req);
403 if (rc != SUCCESS) {
404 BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
405 "failed. issue cleanup\n");
406 bnx2fc_initiate_cleanup(rec_req);
407 }
408 orig_io_req->rec_retry++;
409 /* REC timedout. send ABTS to the orig IO req */
410 if (orig_io_req->rec_retry <= REC_RETRY_COUNT) {
411 spin_unlock_bh(&tgt->tgt_lock);
412 rc = bnx2fc_send_rec(orig_io_req);
413 spin_lock_bh(&tgt->tgt_lock);
414 if (!rc)
415 goto rec_compl_done;
416 }
417 rc = bnx2fc_initiate_abts(orig_io_req);
418 if (rc != SUCCESS) {
419 BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
420 "failed xid = 0x%x. issue cleanup\n",
421 orig_io_req->xid);
422 bnx2fc_initiate_cleanup(orig_io_req);
423 }
424 goto rec_compl_done;
425 }
426
427 if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags)) {
428 BNX2FC_IO_DBG(rec_req, "completed"
429 "orig_io - 0x%x\n",
430 orig_io_req->xid);
431 goto rec_compl_done;
432 }
433 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
434 BNX2FC_IO_DBG(rec_req, "abts in prog "
435 "orig_io - 0x%x\n",
436 orig_io_req->xid);
437 goto rec_compl_done;
438 }
439
440 mp_req = &(rec_req->mp_req);
441 fc_hdr = &(mp_req->resp_fc_hdr);
442 resp_len = mp_req->resp_len;
443 acc = resp_buf = mp_req->resp_buf;
444
445 hdr_len = sizeof(*fc_hdr);
446
447 buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
448 if (!buf) {
449 printk(KERN_ERR PFX "rec buf: mem alloc failure\n");
450 goto rec_compl_done;
451 }
452 memcpy(buf, fc_hdr, hdr_len);
453 memcpy(buf + hdr_len, resp_buf, resp_len);
454
455 fp = fc_frame_alloc(NULL, resp_len);
456 if (!fp) {
457 printk(KERN_ERR PFX "fc_frame_alloc failure\n");
458 goto free_buf;
459 }
460
461 fh = (struct fc_frame_header *) fc_frame_header_get(fp);
462 /* Copy FC Frame header and payload into the frame */
463 memcpy(fh, buf, hdr_len + resp_len);
464
465 opcode = fc_frame_payload_op(fp);
466 if (opcode == ELS_LS_RJT) {
467 BNX2FC_IO_DBG(rec_req, "opcode is RJT\n");
468 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
469 if ((rjt->er_reason == ELS_RJT_LOGIC ||
470 rjt->er_reason == ELS_RJT_UNAB) &&
471 rjt->er_explan == ELS_EXPL_OXID_RXID) {
472 BNX2FC_IO_DBG(rec_req, "handle CMD LOST case\n");
473 new_io_req = bnx2fc_cmd_alloc(tgt);
474 if (!new_io_req)
475 goto abort_io;
476 new_io_req->sc_cmd = orig_io_req->sc_cmd;
477 /* cleanup orig_io_req that is with the FW */
478 set_bit(BNX2FC_FLAG_CMD_LOST,
479 &orig_io_req->req_flags);
480 bnx2fc_initiate_cleanup(orig_io_req);
481 /* Post a new IO req with the same sc_cmd */
482 BNX2FC_IO_DBG(rec_req, "Post IO request again\n");
483 rc = bnx2fc_post_io_req(tgt, new_io_req);
484 if (!rc)
485 goto free_frame;
486 BNX2FC_IO_DBG(rec_req, "REC: io post err\n");
487 }
488 abort_io:
489 rc = bnx2fc_initiate_abts(orig_io_req);
490 if (rc != SUCCESS) {
491 BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
492 "failed. issue cleanup\n");
493 bnx2fc_initiate_cleanup(orig_io_req);
494 }
495 } else if (opcode == ELS_LS_ACC) {
496 /* REVISIT: Check if the exchange is already aborted */
497 offset = ntohl(acc->reca_fc4value);
498 e_stat = ntohl(acc->reca_e_stat);
499 if (e_stat & ESB_ST_SEQ_INIT) {
500 BNX2FC_IO_DBG(rec_req, "target has the seq init\n");
501 goto free_frame;
502 }
503 BNX2FC_IO_DBG(rec_req, "e_stat = 0x%x, offset = 0x%x\n",
504 e_stat, offset);
505 /* Seq initiative is with us */
506 err_entry = (struct fcoe_err_report_entry *)
507 &orig_io_req->err_entry;
508 sc_cmd = orig_io_req->sc_cmd;
509 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
510 /* SCSI WRITE command */
511 if (offset == orig_io_req->data_xfer_len) {
512 BNX2FC_IO_DBG(rec_req, "WRITE - resp lost\n");
513 /* FCP_RSP lost */
514 r_ctl = FC_RCTL_DD_CMD_STATUS;
515 offset = 0;
516 } else {
517 /* start transmitting from offset */
518 BNX2FC_IO_DBG(rec_req, "XFER_RDY/DATA lost\n");
519 send_seq_clnp = true;
520 r_ctl = FC_RCTL_DD_DATA_DESC;
521 if (bnx2fc_initiate_seq_cleanup(orig_io_req,
522 offset, r_ctl))
523 abort_io = true;
524 /* XFER_RDY */
525 }
526 } else {
527 /* SCSI READ command */
528 if (err_entry->data.rx_buf_off ==
529 orig_io_req->data_xfer_len) {
530 /* FCP_RSP lost */
531 BNX2FC_IO_DBG(rec_req, "READ - resp lost\n");
532 r_ctl = FC_RCTL_DD_CMD_STATUS;
533 offset = 0;
534 } else {
535 /* request retransmission from this offset */
536 send_seq_clnp = true;
537 offset = err_entry->data.rx_buf_off;
538 BNX2FC_IO_DBG(rec_req, "RD DATA lost\n");
539 /* FCP_DATA lost */
540 r_ctl = FC_RCTL_DD_SOL_DATA;
541 if (bnx2fc_initiate_seq_cleanup(orig_io_req,
542 offset, r_ctl))
543 abort_io = true;
544 }
545 }
546 if (abort_io) {
547 rc = bnx2fc_initiate_abts(orig_io_req);
548 if (rc != SUCCESS) {
549 BNX2FC_IO_DBG(rec_req, "rec_compl:initiate_abts"
550 " failed. issue cleanup\n");
551 bnx2fc_initiate_cleanup(orig_io_req);
552 }
553 } else if (!send_seq_clnp) {
554 BNX2FC_IO_DBG(rec_req, "Send SRR - FCP_RSP\n");
555 spin_unlock_bh(&tgt->tgt_lock);
556 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
557 spin_lock_bh(&tgt->tgt_lock);
558
559 if (rc) {
560 BNX2FC_IO_DBG(rec_req, "Unable to send SRR"
561 " IO will abort\n");
562 }
563 }
564 }
565 free_frame:
566 fc_frame_free(fp);
567 free_buf:
568 kfree(buf);
569 rec_compl_done:
570 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
571 kfree(cb_arg);
572 }
573
574 int bnx2fc_send_rec(struct bnx2fc_cmd *orig_io_req)
575 {
576 struct fc_els_rec rec;
577 struct bnx2fc_rport *tgt = orig_io_req->tgt;
578 struct fc_lport *lport = tgt->rdata->local_port;
579 struct bnx2fc_els_cb_arg *cb_arg = NULL;
580 u32 sid = tgt->sid;
581 u32 r_a_tov = lport->r_a_tov;
582 int rc;
583
584 BNX2FC_IO_DBG(orig_io_req, "Sending REC\n");
585 memset(&rec, 0, sizeof(rec));
586
587 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
588 if (!cb_arg) {
589 printk(KERN_ERR PFX "Unable to allocate cb_arg for REC\n");
590 rc = -ENOMEM;
591 goto rec_err;
592 }
593 kref_get(&orig_io_req->refcount);
594
595 cb_arg->aborted_io_req = orig_io_req;
596
597 rec.rec_cmd = ELS_REC;
598 hton24(rec.rec_s_id, sid);
599 rec.rec_ox_id = htons(orig_io_req->xid);
600 rec.rec_rx_id = htons(orig_io_req->task->rxwr_txrd.var_ctx.rx_id);
601
602 rc = bnx2fc_initiate_els(tgt, ELS_REC, &rec, sizeof(rec),
603 bnx2fc_rec_compl, cb_arg,
604 r_a_tov);
605 rec_err:
606 if (rc) {
607 BNX2FC_IO_DBG(orig_io_req, "REC failed - release\n");
608 spin_lock_bh(&tgt->tgt_lock);
609 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
610 spin_unlock_bh(&tgt->tgt_lock);
611 kfree(cb_arg);
612 }
613 return rc;
614 }
615
616 int bnx2fc_send_srr(struct bnx2fc_cmd *orig_io_req, u32 offset, u8 r_ctl)
617 {
618 struct fcp_srr srr;
619 struct bnx2fc_rport *tgt = orig_io_req->tgt;
620 struct fc_lport *lport = tgt->rdata->local_port;
621 struct bnx2fc_els_cb_arg *cb_arg = NULL;
622 u32 r_a_tov = lport->r_a_tov;
623 int rc;
624
625 BNX2FC_IO_DBG(orig_io_req, "Sending SRR\n");
626 memset(&srr, 0, sizeof(srr));
627
628 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
629 if (!cb_arg) {
630 printk(KERN_ERR PFX "Unable to allocate cb_arg for SRR\n");
631 rc = -ENOMEM;
632 goto srr_err;
633 }
634 kref_get(&orig_io_req->refcount);
635
636 cb_arg->aborted_io_req = orig_io_req;
637
638 srr.srr_op = ELS_SRR;
639 srr.srr_ox_id = htons(orig_io_req->xid);
640 srr.srr_rx_id = htons(orig_io_req->task->rxwr_txrd.var_ctx.rx_id);
641 srr.srr_rel_off = htonl(offset);
642 srr.srr_r_ctl = r_ctl;
643 orig_io_req->srr_offset = offset;
644 orig_io_req->srr_rctl = r_ctl;
645
646 rc = bnx2fc_initiate_els(tgt, ELS_SRR, &srr, sizeof(srr),
647 bnx2fc_srr_compl, cb_arg,
648 r_a_tov);
649 srr_err:
650 if (rc) {
651 BNX2FC_IO_DBG(orig_io_req, "SRR failed - release\n");
652 spin_lock_bh(&tgt->tgt_lock);
653 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
654 spin_unlock_bh(&tgt->tgt_lock);
655 kfree(cb_arg);
656 } else
657 set_bit(BNX2FC_FLAG_SRR_SENT, &orig_io_req->req_flags);
658
659 return rc;
660 }
661
662 static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op,
663 void *data, u32 data_len,
664 void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg),
665 struct bnx2fc_els_cb_arg *cb_arg, u32 timer_msec)
666 {
667 struct fcoe_port *port = tgt->port;
668 struct bnx2fc_interface *interface = port->priv;
669 struct fc_rport *rport = tgt->rport;
670 struct fc_lport *lport = port->lport;
671 struct bnx2fc_cmd *els_req;
672 struct bnx2fc_mp_req *mp_req;
673 struct fc_frame_header *fc_hdr;
674 struct fcoe_task_ctx_entry *task;
675 struct fcoe_task_ctx_entry *task_page;
676 int rc = 0;
677 int task_idx, index;
678 u32 did, sid;
679 u16 xid;
680
681 rc = fc_remote_port_chkready(rport);
682 if (rc) {
683 printk(KERN_ERR PFX "els 0x%x: rport not ready\n", op);
684 rc = -EINVAL;
685 goto els_err;
686 }
687 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
688 printk(KERN_ERR PFX "els 0x%x: link is not ready\n", op);
689 rc = -EINVAL;
690 goto els_err;
691 }
692 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) ||
693 (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags))) {
694 printk(KERN_ERR PFX "els 0x%x: tgt not ready\n", op);
695 rc = -EINVAL;
696 goto els_err;
697 }
698 els_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ELS);
699 if (!els_req) {
700 rc = -ENOMEM;
701 goto els_err;
702 }
703
704 els_req->sc_cmd = NULL;
705 els_req->port = port;
706 els_req->tgt = tgt;
707 els_req->cb_func = cb_func;
708 cb_arg->io_req = els_req;
709 els_req->cb_arg = cb_arg;
710
711 mp_req = (struct bnx2fc_mp_req *)&(els_req->mp_req);
712 rc = bnx2fc_init_mp_req(els_req);
713 if (rc == FAILED) {
714 printk(KERN_ERR PFX "ELS MP request init failed\n");
715 spin_lock_bh(&tgt->tgt_lock);
716 kref_put(&els_req->refcount, bnx2fc_cmd_release);
717 spin_unlock_bh(&tgt->tgt_lock);
718 rc = -ENOMEM;
719 goto els_err;
720 } else {
721 /* rc SUCCESS */
722 rc = 0;
723 }
724
725 /* Set the data_xfer_len to the size of ELS payload */
726 mp_req->req_len = data_len;
727 els_req->data_xfer_len = mp_req->req_len;
728
729 /* Fill ELS Payload */
730 if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) {
731 memcpy(mp_req->req_buf, data, data_len);
732 } else {
733 printk(KERN_ERR PFX "Invalid ELS op 0x%x\n", op);
734 els_req->cb_func = NULL;
735 els_req->cb_arg = NULL;
736 spin_lock_bh(&tgt->tgt_lock);
737 kref_put(&els_req->refcount, bnx2fc_cmd_release);
738 spin_unlock_bh(&tgt->tgt_lock);
739 rc = -EINVAL;
740 }
741
742 if (rc)
743 goto els_err;
744
745 /* Fill FC header */
746 fc_hdr = &(mp_req->req_fc_hdr);
747
748 did = tgt->rport->port_id;
749 sid = tgt->sid;
750
751 if (op == ELS_SRR)
752 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS4_REQ, did, sid,
753 FC_TYPE_FCP, FC_FC_FIRST_SEQ |
754 FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
755 else
756 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid,
757 FC_TYPE_ELS, FC_FC_FIRST_SEQ |
758 FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
759
760 /* Obtain exchange id */
761 xid = els_req->xid;
762 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
763 index = xid % BNX2FC_TASKS_PER_PAGE;
764
765 /* Initialize task context for this IO request */
766 task_page = (struct fcoe_task_ctx_entry *)
767 interface->hba->task_ctx[task_idx];
768 task = &(task_page[index]);
769 bnx2fc_init_mp_task(els_req, task);
770
771 spin_lock_bh(&tgt->tgt_lock);
772
773 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
774 printk(KERN_ERR PFX "initiate_els.. session not ready\n");
775 els_req->cb_func = NULL;
776 els_req->cb_arg = NULL;
777 kref_put(&els_req->refcount, bnx2fc_cmd_release);
778 spin_unlock_bh(&tgt->tgt_lock);
779 return -EINVAL;
780 }
781
782 if (timer_msec)
783 bnx2fc_cmd_timer_set(els_req, timer_msec);
784 bnx2fc_add_2_sq(tgt, xid);
785
786 els_req->on_active_queue = 1;
787 list_add_tail(&els_req->link, &tgt->els_queue);
788
789 /* Ring doorbell */
790 bnx2fc_ring_doorbell(tgt);
791 spin_unlock_bh(&tgt->tgt_lock);
792
793 els_err:
794 return rc;
795 }
796
797 void bnx2fc_process_els_compl(struct bnx2fc_cmd *els_req,
798 struct fcoe_task_ctx_entry *task, u8 num_rq)
799 {
800 struct bnx2fc_mp_req *mp_req;
801 struct fc_frame_header *fc_hdr;
802 u64 *hdr;
803 u64 *temp_hdr;
804
805 BNX2FC_ELS_DBG("Entered process_els_compl xid = 0x%x"
806 "cmd_type = %d\n", els_req->xid, els_req->cmd_type);
807
808 if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
809 &els_req->req_flags)) {
810 BNX2FC_ELS_DBG("Timer context finished processing this "
811 "els - 0x%x\n", els_req->xid);
812 /* This IO doesn't receive cleanup completion */
813 kref_put(&els_req->refcount, bnx2fc_cmd_release);
814 return;
815 }
816
817 /* Cancel the timeout_work, as we received the response */
818 if (cancel_delayed_work(&els_req->timeout_work))
819 kref_put(&els_req->refcount,
820 bnx2fc_cmd_release); /* drop timer hold */
821
822 if (els_req->on_active_queue) {
823 list_del_init(&els_req->link);
824 els_req->on_active_queue = 0;
825 }
826
827 mp_req = &(els_req->mp_req);
828 fc_hdr = &(mp_req->resp_fc_hdr);
829
830 hdr = (u64 *)fc_hdr;
831 temp_hdr = (u64 *)
832 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
833 hdr[0] = cpu_to_be64(temp_hdr[0]);
834 hdr[1] = cpu_to_be64(temp_hdr[1]);
835 hdr[2] = cpu_to_be64(temp_hdr[2]);
836
837 mp_req->resp_len =
838 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
839
840 /* Parse ELS response */
841 if ((els_req->cb_func) && (els_req->cb_arg)) {
842 els_req->cb_func(els_req->cb_arg);
843 els_req->cb_arg = NULL;
844 }
845
846 kref_put(&els_req->refcount, bnx2fc_cmd_release);
847 }
848
849 static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
850 void *arg)
851 {
852 struct fcoe_ctlr *fip = arg;
853 struct fc_exch *exch = fc_seq_exch(seq);
854 struct fc_lport *lport = exch->lp;
855 u8 *mac;
856 u8 op;
857
858 if (IS_ERR(fp))
859 goto done;
860
861 mac = fr_cb(fp)->granted_mac;
862 if (is_zero_ether_addr(mac)) {
863 op = fc_frame_payload_op(fp);
864 if (lport->vport) {
865 if (op == ELS_LS_RJT) {
866 printk(KERN_ERR PFX "bnx2fc_flogi_resp is LS_RJT\n");
867 fc_vport_terminate(lport->vport);
868 fc_frame_free(fp);
869 return;
870 }
871 }
872 fcoe_ctlr_recv_flogi(fip, lport, fp);
873 }
874 if (!is_zero_ether_addr(mac))
875 fip->update_mac(lport, mac);
876 done:
877 fc_lport_flogi_resp(seq, fp, lport);
878 }
879
880 static void bnx2fc_logo_resp(struct fc_seq *seq, struct fc_frame *fp,
881 void *arg)
882 {
883 struct fcoe_ctlr *fip = arg;
884 struct fc_exch *exch = fc_seq_exch(seq);
885 struct fc_lport *lport = exch->lp;
886 static u8 zero_mac[ETH_ALEN] = { 0 };
887
888 if (!IS_ERR(fp))
889 fip->update_mac(lport, zero_mac);
890 fc_lport_logo_resp(seq, fp, lport);
891 }
892
893 struct fc_seq *bnx2fc_elsct_send(struct fc_lport *lport, u32 did,
894 struct fc_frame *fp, unsigned int op,
895 void (*resp)(struct fc_seq *,
896 struct fc_frame *,
897 void *),
898 void *arg, u32 timeout)
899 {
900 struct fcoe_port *port = lport_priv(lport);
901 struct bnx2fc_interface *interface = port->priv;
902 struct fcoe_ctlr *fip = bnx2fc_to_ctlr(interface);
903 struct fc_frame_header *fh = fc_frame_header_get(fp);
904
905 switch (op) {
906 case ELS_FLOGI:
907 case ELS_FDISC:
908 return fc_elsct_send(lport, did, fp, op, bnx2fc_flogi_resp,
909 fip, timeout);
910 case ELS_LOGO:
911 /* only hook onto fabric logouts, not port logouts */
912 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
913 break;
914 return fc_elsct_send(lport, did, fp, op, bnx2fc_logo_resp,
915 fip, timeout);
916 }
917 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
918 }
Linux with added FPC-III support