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LiteX: driver for MMCM
[linux/fpc-iii.git] / drivers / scsi / bnx2fc / bnx2fc_tgt.c
bloba3e2a38aabf2ff91a6f29fe6458925943ab23f57
1 /* bnx2fc_tgt.c: QLogic Linux FCoE offload driver.
2 * Handles operations such as session offload/upload etc, and manages
3 * session resources such as connection id and qp resources.
4 *
5 * Copyright (c) 2008-2013 Broadcom Corporation
6 * Copyright (c) 2014-2016 QLogic Corporation
7 * Copyright (c) 2016-2017 Cavium Inc.
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 static void bnx2fc_upld_timer(struct timer_list *t);
18 static void bnx2fc_ofld_timer(struct timer_list *t);
19 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
20 struct fcoe_port *port,
21 struct fc_rport_priv *rdata);
22 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
23 struct bnx2fc_rport *tgt);
24 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
25 struct bnx2fc_rport *tgt);
26 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
27 struct bnx2fc_rport *tgt);
28 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);
29
30 static void bnx2fc_upld_timer(struct timer_list *t)
31 {
32
33 struct bnx2fc_rport *tgt = from_timer(tgt, t, upld_timer);
34
35 BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
36 /* fake upload completion */
37 clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
38 clear_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);
39 set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
40 wake_up_interruptible(&tgt->upld_wait);
41 }
42
43 static void bnx2fc_ofld_timer(struct timer_list *t)
44 {
45
46 struct bnx2fc_rport *tgt = from_timer(tgt, t, ofld_timer);
47
48 BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
49 /* NOTE: This function should never be called, as
50 * offload should never timeout
51 */
52 /*
53 * If the timer has expired, this session is dead
54 * Clear offloaded flag and logout of this device.
55 * Since OFFLOADED flag is cleared, this case
56 * will be considered as offload error and the
57 * port will be logged off, and conn_id, session
58 * resources are freed up in bnx2fc_offload_session
59 */
60 clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
61 clear_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);
62 set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
63 wake_up_interruptible(&tgt->ofld_wait);
64 }
65
66 static void bnx2fc_ofld_wait(struct bnx2fc_rport *tgt)
67 {
68 timer_setup(&tgt->ofld_timer, bnx2fc_ofld_timer, 0);
69 mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
70
71 wait_event_interruptible(tgt->ofld_wait,
72 (test_bit(
73 BNX2FC_FLAG_OFLD_REQ_CMPL,
74 &tgt->flags)));
75 if (signal_pending(current))
76 flush_signals(current);
77 del_timer_sync(&tgt->ofld_timer);
78 }
79
80 static void bnx2fc_offload_session(struct fcoe_port *port,
81 struct bnx2fc_rport *tgt,
82 struct fc_rport_priv *rdata)
83 {
84 struct fc_rport *rport = rdata->rport;
85 struct bnx2fc_interface *interface = port->priv;
86 struct bnx2fc_hba *hba = interface->hba;
87 int rval;
88 int i = 0;
89
90 /* Initialize bnx2fc_rport */
91 /* NOTE: tgt is already bzero'd */
92 rval = bnx2fc_init_tgt(tgt, port, rdata);
93 if (rval) {
94 printk(KERN_ERR PFX "Failed to allocate conn id for "
95 "port_id (%6x)\n", rport->port_id);
96 goto tgt_init_err;
97 }
98
99 /* Allocate session resources */
100 rval = bnx2fc_alloc_session_resc(hba, tgt);
101 if (rval) {
102 printk(KERN_ERR PFX "Failed to allocate resources\n");
103 goto ofld_err;
104 }
105
106 /*
107 * Initialize FCoE session offload process.
108 * Upon completion of offload process add
109 * rport to list of rports
110 */
111 retry_ofld:
112 clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
113 rval = bnx2fc_send_session_ofld_req(port, tgt);
114 if (rval) {
115 printk(KERN_ERR PFX "ofld_req failed\n");
116 goto ofld_err;
117 }
118
119 /*
120 * wait for the session is offloaded and enabled. 3 Secs
121 * should be ample time for this process to complete.
122 */
123 bnx2fc_ofld_wait(tgt);
124
125 if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
126 if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
127 &tgt->flags)) {
128 BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
129 "retry ofld..%d\n", i++);
130 msleep_interruptible(1000);
131 if (i > 3) {
132 i = 0;
133 goto ofld_err;
134 }
135 goto retry_ofld;
136 }
137 goto ofld_err;
138 }
139 if (bnx2fc_map_doorbell(tgt)) {
140 printk(KERN_ERR PFX "map doorbell failed - no mem\n");
141 goto ofld_err;
142 }
143 clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
144 rval = bnx2fc_send_session_enable_req(port, tgt);
145 if (rval) {
146 pr_err(PFX "enable session failed\n");
147 goto ofld_err;
148 }
149 bnx2fc_ofld_wait(tgt);
150 if (!(test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags)))
151 goto ofld_err;
152 return;
153
154 ofld_err:
155 /* couldn't offload the session. log off from this rport */
156 BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
157 clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
158 /* Free session resources */
159 bnx2fc_free_session_resc(hba, tgt);
160 tgt_init_err:
161 if (tgt->fcoe_conn_id != -1)
162 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
163 fc_rport_logoff(rdata);
164 }
165
166 void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
167 {
168 struct bnx2fc_cmd *io_req;
169 struct bnx2fc_cmd *tmp;
170 int rc;
171 int i = 0;
172 BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
173 tgt->num_active_ios.counter);
174
175 spin_lock_bh(&tgt->tgt_lock);
176 tgt->flush_in_prog = 1;
177
178 list_for_each_entry_safe(io_req, tmp, &tgt->active_cmd_queue, link) {
179 i++;
180 list_del_init(&io_req->link);
181 io_req->on_active_queue = 0;
182 BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
183
184 if (cancel_delayed_work(&io_req->timeout_work)) {
185 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
186 &io_req->req_flags)) {
187 /* Handle eh_abort timeout */
188 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
189 "cleaned up\n");
190 complete(&io_req->abts_done);
191 }
192 kref_put(&io_req->refcount,
193 bnx2fc_cmd_release); /* drop timer hold */
194 }
195
196 set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
197 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
198
199 /* Do not issue cleanup when disable request failed */
200 if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags))
201 bnx2fc_process_cleanup_compl(io_req, io_req->task, 0);
202 else {
203 rc = bnx2fc_initiate_cleanup(io_req);
204 BUG_ON(rc);
205 }
206 }
207
208 list_for_each_entry_safe(io_req, tmp, &tgt->active_tm_queue, link) {
209 i++;
210 list_del_init(&io_req->link);
211 io_req->on_tmf_queue = 0;
212 BNX2FC_IO_DBG(io_req, "tm_queue cleanup\n");
213 if (io_req->wait_for_abts_comp)
214 complete(&io_req->abts_done);
215 }
216
217 list_for_each_entry_safe(io_req, tmp, &tgt->els_queue, link) {
218 i++;
219 list_del_init(&io_req->link);
220 io_req->on_active_queue = 0;
221
222 BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
223
224 if (cancel_delayed_work(&io_req->timeout_work))
225 kref_put(&io_req->refcount,
226 bnx2fc_cmd_release); /* drop timer hold */
227
228 if ((io_req->cb_func) && (io_req->cb_arg)) {
229 io_req->cb_func(io_req->cb_arg);
230 io_req->cb_arg = NULL;
231 }
232
233 /* Do not issue cleanup when disable request failed */
234 if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags))
235 bnx2fc_process_cleanup_compl(io_req, io_req->task, 0);
236 else {
237 rc = bnx2fc_initiate_cleanup(io_req);
238 BUG_ON(rc);
239 }
240 }
241
242 list_for_each_entry_safe(io_req, tmp, &tgt->io_retire_queue, link) {
243 i++;
244 list_del_init(&io_req->link);
245
246 BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
247
248 if (cancel_delayed_work(&io_req->timeout_work)) {
249 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
250 &io_req->req_flags)) {
251 /* Handle eh_abort timeout */
252 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
253 "in retire_q\n");
254 if (io_req->wait_for_abts_comp)
255 complete(&io_req->abts_done);
256 }
257 kref_put(&io_req->refcount, bnx2fc_cmd_release);
258 }
259
260 clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
261 }
262
263 BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
264 i = 0;
265 spin_unlock_bh(&tgt->tgt_lock);
266 /* wait for active_ios to go to 0 */
267 while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
268 msleep(25);
269 if (tgt->num_active_ios.counter != 0)
270 printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
271 " active_ios = %d\n",
272 tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
273 spin_lock_bh(&tgt->tgt_lock);
274 tgt->flush_in_prog = 0;
275 spin_unlock_bh(&tgt->tgt_lock);
276 }
277
278 static void bnx2fc_upld_wait(struct bnx2fc_rport *tgt)
279 {
280 timer_setup(&tgt->upld_timer, bnx2fc_upld_timer, 0);
281 mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
282 wait_event_interruptible(tgt->upld_wait,
283 (test_bit(
284 BNX2FC_FLAG_UPLD_REQ_COMPL,
285 &tgt->flags)));
286 if (signal_pending(current))
287 flush_signals(current);
288 del_timer_sync(&tgt->upld_timer);
289 }
290
291 static void bnx2fc_upload_session(struct fcoe_port *port,
292 struct bnx2fc_rport *tgt)
293 {
294 struct bnx2fc_interface *interface = port->priv;
295 struct bnx2fc_hba *hba = interface->hba;
296
297 BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
298 tgt->num_active_ios.counter);
299
300 /*
301 * Called with hba->hba_mutex held.
302 * This is a blocking call
303 */
304 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
305 bnx2fc_send_session_disable_req(port, tgt);
306
307 /*
308 * wait for upload to complete. 3 Secs
309 * should be sufficient time for this process to complete.
310 */
311 BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
312 bnx2fc_upld_wait(tgt);
313
314 /*
315 * traverse thru the active_q and tmf_q and cleanup
316 * IOs in these lists
317 */
318 BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
319 tgt->flags);
320 bnx2fc_flush_active_ios(tgt);
321
322 /* Issue destroy KWQE */
323 if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
324 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
325 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
326 bnx2fc_send_session_destroy_req(hba, tgt);
327
328 /* wait for destroy to complete */
329 bnx2fc_upld_wait(tgt);
330
331 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
332 printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
333
334 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
335 tgt->flags);
336
337 } else if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags)) {
338 printk(KERN_ERR PFX "ERROR!! DISABLE req failed, destroy"
339 " not sent to FW\n");
340 } else {
341 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
342 " not sent to FW\n");
343 }
344
345 /* Free session resources */
346 bnx2fc_free_session_resc(hba, tgt);
347 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
348 }
349
350 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
351 struct fcoe_port *port,
352 struct fc_rport_priv *rdata)
353 {
354
355 struct fc_rport *rport = rdata->rport;
356 struct bnx2fc_interface *interface = port->priv;
357 struct bnx2fc_hba *hba = interface->hba;
358 struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
359 struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
360
361 tgt->rport = rport;
362 tgt->rdata = rdata;
363 tgt->port = port;
364
365 if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
366 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
367 tgt->fcoe_conn_id = -1;
368 return -1;
369 }
370
371 tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
372 if (tgt->fcoe_conn_id == -1)
373 return -1;
374
375 BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
376
377 tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
378 tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
379 tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
380 atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);
381
382 /* Initialize the toggle bit */
383 tgt->sq_curr_toggle_bit = 1;
384 tgt->cq_curr_toggle_bit = 1;
385 tgt->sq_prod_idx = 0;
386 tgt->cq_cons_idx = 0;
387 tgt->rq_prod_idx = 0x8000;
388 tgt->rq_cons_idx = 0;
389 atomic_set(&tgt->num_active_ios, 0);
390 tgt->retry_delay_timestamp = 0;
391
392 if (rdata->flags & FC_RP_FLAGS_RETRY &&
393 rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
394 !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
395 tgt->dev_type = TYPE_TAPE;
396 tgt->io_timeout = 0; /* use default ULP timeout */
397 } else {
398 tgt->dev_type = TYPE_DISK;
399 tgt->io_timeout = BNX2FC_IO_TIMEOUT;
400 }
401
402 /* initialize sq doorbell */
403 sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
404 sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
405 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
406 /* initialize rx doorbell */
407 rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
408 (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
409 (B577XX_FCOE_CONNECTION_TYPE <<
410 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
411 rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
412 (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);
413
414 spin_lock_init(&tgt->tgt_lock);
415 spin_lock_init(&tgt->cq_lock);
416
417 /* Initialize active_cmd_queue list */
418 INIT_LIST_HEAD(&tgt->active_cmd_queue);
419
420 /* Initialize IO retire queue */
421 INIT_LIST_HEAD(&tgt->io_retire_queue);
422
423 INIT_LIST_HEAD(&tgt->els_queue);
424
425 /* Initialize active_tm_queue list */
426 INIT_LIST_HEAD(&tgt->active_tm_queue);
427
428 init_waitqueue_head(&tgt->ofld_wait);
429 init_waitqueue_head(&tgt->upld_wait);
430
431 return 0;
432 }
433
434 /*
435 * This event_callback is called after successful completion of libfc
436 * initiated target login. bnx2fc can proceed with initiating the session
437 * establishment.
438 */
439 void bnx2fc_rport_event_handler(struct fc_lport *lport,
440 struct fc_rport_priv *rdata,
441 enum fc_rport_event event)
442 {
443 struct fcoe_port *port = lport_priv(lport);
444 struct bnx2fc_interface *interface = port->priv;
445 struct bnx2fc_hba *hba = interface->hba;
446 struct fc_rport *rport = rdata->rport;
447 struct fc_rport_libfc_priv *rp;
448 struct bnx2fc_rport *tgt;
449 u32 port_id;
450
451 BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
452 event, rdata->ids.port_id);
453 switch (event) {
454 case RPORT_EV_READY:
455 if (!rport) {
456 printk(KERN_ERR PFX "rport is NULL: ERROR!\n");
457 break;
458 }
459
460 rp = rport->dd_data;
461 if (rport->port_id == FC_FID_DIR_SERV) {
462 /*
463 * bnx2fc_rport structure doesn't exist for
464 * directory server.
465 * We should not come here, as lport will
466 * take care of fabric login
467 */
468 printk(KERN_ERR PFX "%x - rport_event_handler ERROR\n",
469 rdata->ids.port_id);
470 break;
471 }
472
473 if (rdata->spp_type != FC_TYPE_FCP) {
474 BNX2FC_HBA_DBG(lport, "not FCP type target."
475 " not offloading\n");
476 break;
477 }
478 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
479 BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
480 " not offloading\n");
481 break;
482 }
483
484 /*
485 * Offlaod process is protected with hba mutex.
486 * Use the same mutex_lock for upload process too
487 */
488 mutex_lock(&hba->hba_mutex);
489 tgt = (struct bnx2fc_rport *)&rp[1];
490
491 /* This can happen when ADISC finds the same target */
492 if (test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags)) {
493 BNX2FC_TGT_DBG(tgt, "already offloaded\n");
494 mutex_unlock(&hba->hba_mutex);
495 return;
496 }
497
498 /*
499 * Offload the session. This is a blocking call, and will
500 * wait until the session is offloaded.
501 */
502 bnx2fc_offload_session(port, tgt, rdata);
503
504 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
505 hba->num_ofld_sess);
506
507 if (test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags)) {
508 /* Session is offloaded and enabled. */
509 BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
510 /* This counter is protected with hba mutex */
511 hba->num_ofld_sess++;
512
513 set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
514 } else {
515 /*
516 * Offload or enable would have failed.
517 * In offload/enable completion path, the
518 * rport would have already been removed
519 */
520 BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
521 "offloaded flag not set\n");
522 }
523 mutex_unlock(&hba->hba_mutex);
524 break;
525 case RPORT_EV_LOGO:
526 case RPORT_EV_FAILED:
527 case RPORT_EV_STOP:
528 port_id = rdata->ids.port_id;
529 if (port_id == FC_FID_DIR_SERV)
530 break;
531
532 if (!rport) {
533 printk(KERN_INFO PFX "%x - rport not created Yet!!\n",
534 port_id);
535 break;
536 }
537 rp = rport->dd_data;
538 mutex_lock(&hba->hba_mutex);
539 /*
540 * Perform session upload. Note that rdata->peers is already
541 * removed from disc->rports list before we get this event.
542 */
543 tgt = (struct bnx2fc_rport *)&rp[1];
544
545 if (!(test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags))) {
546 mutex_unlock(&hba->hba_mutex);
547 break;
548 }
549 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
550
551 bnx2fc_upload_session(port, tgt);
552 hba->num_ofld_sess--;
553 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
554 hba->num_ofld_sess);
555 /*
556 * Try to wake up the linkdown wait thread. If num_ofld_sess
557 * is 0, the waiting therad wakes up
558 */
559 if ((hba->wait_for_link_down) &&
560 (hba->num_ofld_sess == 0)) {
561 wake_up_interruptible(&hba->shutdown_wait);
562 }
563 mutex_unlock(&hba->hba_mutex);
564
565 break;
566
567 case RPORT_EV_NONE:
568 break;
569 }
570 }
571
572 /**
573 * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
574 *
575 * @port: fcoe_port struct to lookup the target port on
576 * @port_id: The remote port ID to look up
577 */
578 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
579 u32 port_id)
580 {
581 struct bnx2fc_interface *interface = port->priv;
582 struct bnx2fc_hba *hba = interface->hba;
583 struct bnx2fc_rport *tgt;
584 struct fc_rport_priv *rdata;
585 int i;
586
587 for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
588 tgt = hba->tgt_ofld_list[i];
589 if ((tgt) && (tgt->port == port)) {
590 rdata = tgt->rdata;
591 if (rdata->ids.port_id == port_id) {
592 if (rdata->rp_state != RPORT_ST_DELETE) {
593 BNX2FC_TGT_DBG(tgt, "rport "
594 "obtained\n");
595 return tgt;
596 } else {
597 BNX2FC_TGT_DBG(tgt, "rport 0x%x "
598 "is in DELETED state\n",
599 rdata->ids.port_id);
600 return NULL;
601 }
602 }
603 }
604 }
605 return NULL;
606 }
607
608
609 /**
610 * bnx2fc_alloc_conn_id - allocates FCOE Connection id
611 *
612 * @hba: pointer to adapter structure
613 * @tgt: pointer to bnx2fc_rport structure
614 */
615 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
616 struct bnx2fc_rport *tgt)
617 {
618 u32 conn_id, next;
619
620 /* called with hba mutex held */
621
622 /*
623 * tgt_ofld_list access is synchronized using
624 * both hba mutex and hba lock. Atleast hba mutex or
625 * hba lock needs to be held for read access.
626 */
627
628 spin_lock_bh(&hba->hba_lock);
629 next = hba->next_conn_id;
630 conn_id = hba->next_conn_id++;
631 if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
632 hba->next_conn_id = 0;
633
634 while (hba->tgt_ofld_list[conn_id] != NULL) {
635 conn_id++;
636 if (conn_id == BNX2FC_NUM_MAX_SESS)
637 conn_id = 0;
638
639 if (conn_id == next) {
640 /* No free conn_ids are available */
641 spin_unlock_bh(&hba->hba_lock);
642 return -1;
643 }
644 }
645 hba->tgt_ofld_list[conn_id] = tgt;
646 tgt->fcoe_conn_id = conn_id;
647 spin_unlock_bh(&hba->hba_lock);
648 return conn_id;
649 }
650
651 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
652 {
653 /* called with hba mutex held */
654 spin_lock_bh(&hba->hba_lock);
655 hba->tgt_ofld_list[conn_id] = NULL;
656 spin_unlock_bh(&hba->hba_lock);
657 }
658
659 /*
660 * bnx2fc_alloc_session_resc - Allocate qp resources for the session
661 */
662 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
663 struct bnx2fc_rport *tgt)
664 {
665 dma_addr_t page;
666 int num_pages;
667 u32 *pbl;
668
669 /* Allocate and map SQ */
670 tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
671 tgt->sq_mem_size = (tgt->sq_mem_size + (CNIC_PAGE_SIZE - 1)) &
672 CNIC_PAGE_MASK;
673
674 tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
675 &tgt->sq_dma, GFP_KERNEL);
676 if (!tgt->sq) {
677 printk(KERN_ERR PFX "unable to allocate SQ memory %d\n",
678 tgt->sq_mem_size);
679 goto mem_alloc_failure;
680 }
681
682 /* Allocate and map CQ */
683 tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
684 tgt->cq_mem_size = (tgt->cq_mem_size + (CNIC_PAGE_SIZE - 1)) &
685 CNIC_PAGE_MASK;
686
687 tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
688 &tgt->cq_dma, GFP_KERNEL);
689 if (!tgt->cq) {
690 printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
691 tgt->cq_mem_size);
692 goto mem_alloc_failure;
693 }
694
695 /* Allocate and map RQ and RQ PBL */
696 tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
697 tgt->rq_mem_size = (tgt->rq_mem_size + (CNIC_PAGE_SIZE - 1)) &
698 CNIC_PAGE_MASK;
699
700 tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
701 &tgt->rq_dma, GFP_KERNEL);
702 if (!tgt->rq) {
703 printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
704 tgt->rq_mem_size);
705 goto mem_alloc_failure;
706 }
707
708 tgt->rq_pbl_size = (tgt->rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
709 tgt->rq_pbl_size = (tgt->rq_pbl_size + (CNIC_PAGE_SIZE - 1)) &
710 CNIC_PAGE_MASK;
711
712 tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
713 &tgt->rq_pbl_dma, GFP_KERNEL);
714 if (!tgt->rq_pbl) {
715 printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
716 tgt->rq_pbl_size);
717 goto mem_alloc_failure;
718 }
719
720 num_pages = tgt->rq_mem_size / CNIC_PAGE_SIZE;
721 page = tgt->rq_dma;
722 pbl = (u32 *)tgt->rq_pbl;
723
724 while (num_pages--) {
725 *pbl = (u32)page;
726 pbl++;
727 *pbl = (u32)((u64)page >> 32);
728 pbl++;
729 page += CNIC_PAGE_SIZE;
730 }
731
732 /* Allocate and map XFERQ */
733 tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
734 tgt->xferq_mem_size = (tgt->xferq_mem_size + (CNIC_PAGE_SIZE - 1)) &
735 CNIC_PAGE_MASK;
736
737 tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev,
738 tgt->xferq_mem_size, &tgt->xferq_dma,
739 GFP_KERNEL);
740 if (!tgt->xferq) {
741 printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
742 tgt->xferq_mem_size);
743 goto mem_alloc_failure;
744 }
745
746 /* Allocate and map CONFQ & CONFQ PBL */
747 tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
748 tgt->confq_mem_size = (tgt->confq_mem_size + (CNIC_PAGE_SIZE - 1)) &
749 CNIC_PAGE_MASK;
750
751 tgt->confq = dma_alloc_coherent(&hba->pcidev->dev,
752 tgt->confq_mem_size, &tgt->confq_dma,
753 GFP_KERNEL);
754 if (!tgt->confq) {
755 printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
756 tgt->confq_mem_size);
757 goto mem_alloc_failure;
758 }
759
760 tgt->confq_pbl_size =
761 (tgt->confq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
762 tgt->confq_pbl_size =
763 (tgt->confq_pbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
764
765 tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
766 tgt->confq_pbl_size,
767 &tgt->confq_pbl_dma, GFP_KERNEL);
768 if (!tgt->confq_pbl) {
769 printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
770 tgt->confq_pbl_size);
771 goto mem_alloc_failure;
772 }
773
774 num_pages = tgt->confq_mem_size / CNIC_PAGE_SIZE;
775 page = tgt->confq_dma;
776 pbl = (u32 *)tgt->confq_pbl;
777
778 while (num_pages--) {
779 *pbl = (u32)page;
780 pbl++;
781 *pbl = (u32)((u64)page >> 32);
782 pbl++;
783 page += CNIC_PAGE_SIZE;
784 }
785
786 /* Allocate and map ConnDB */
787 tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
788
789 tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
790 tgt->conn_db_mem_size,
791 &tgt->conn_db_dma, GFP_KERNEL);
792 if (!tgt->conn_db) {
793 printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
794 tgt->conn_db_mem_size);
795 goto mem_alloc_failure;
796 }
797
798
799 /* Allocate and map LCQ */
800 tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
801 tgt->lcq_mem_size = (tgt->lcq_mem_size + (CNIC_PAGE_SIZE - 1)) &
802 CNIC_PAGE_MASK;
803
804 tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
805 &tgt->lcq_dma, GFP_KERNEL);
806
807 if (!tgt->lcq) {
808 printk(KERN_ERR PFX "unable to allocate lcq %d\n",
809 tgt->lcq_mem_size);
810 goto mem_alloc_failure;
811 }
812
813 tgt->conn_db->rq_prod = 0x8000;
814
815 return 0;
816
817 mem_alloc_failure:
818 return -ENOMEM;
819 }
820
821 /**
822 * bnx2i_free_session_resc - free qp resources for the session
823 *
824 * @hba: adapter structure pointer
825 * @tgt: bnx2fc_rport structure pointer
826 *
827 * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
828 */
829 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
830 struct bnx2fc_rport *tgt)
831 {
832 void __iomem *ctx_base_ptr;
833
834 BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
835
836 spin_lock_bh(&tgt->cq_lock);
837 ctx_base_ptr = tgt->ctx_base;
838 tgt->ctx_base = NULL;
839
840 /* Free LCQ */
841 if (tgt->lcq) {
842 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
843 tgt->lcq, tgt->lcq_dma);
844 tgt->lcq = NULL;
845 }
846 /* Free connDB */
847 if (tgt->conn_db) {
848 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
849 tgt->conn_db, tgt->conn_db_dma);
850 tgt->conn_db = NULL;
851 }
852 /* Free confq and confq pbl */
853 if (tgt->confq_pbl) {
854 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
855 tgt->confq_pbl, tgt->confq_pbl_dma);
856 tgt->confq_pbl = NULL;
857 }
858 if (tgt->confq) {
859 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
860 tgt->confq, tgt->confq_dma);
861 tgt->confq = NULL;
862 }
863 /* Free XFERQ */
864 if (tgt->xferq) {
865 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
866 tgt->xferq, tgt->xferq_dma);
867 tgt->xferq = NULL;
868 }
869 /* Free RQ PBL and RQ */
870 if (tgt->rq_pbl) {
871 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
872 tgt->rq_pbl, tgt->rq_pbl_dma);
873 tgt->rq_pbl = NULL;
874 }
875 if (tgt->rq) {
876 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
877 tgt->rq, tgt->rq_dma);
878 tgt->rq = NULL;
879 }
880 /* Free CQ */
881 if (tgt->cq) {
882 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
883 tgt->cq, tgt->cq_dma);
884 tgt->cq = NULL;
885 }
886 /* Free SQ */
887 if (tgt->sq) {
888 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
889 tgt->sq, tgt->sq_dma);
890 tgt->sq = NULL;
891 }
892 spin_unlock_bh(&tgt->cq_lock);
893
894 if (ctx_base_ptr)
895 iounmap(ctx_base_ptr);
896 }
Linux with added FPC-III support