summaryrefslogtreecommitdiff
path: root/drivers/scsi/bnx2fc/bnx2fc_tgt.c
blob: c1800b5312708a914cf424319dd7376fbb008186 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
/* bnx2fc_tgt.c: Broadcom NetXtreme II Linux FCoE offload driver.
 * Handles operations such as session offload/upload etc, and manages
 * session resources such as connection id and qp resources.
 *
 * Copyright (c) 2008 - 2011 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
 */

#include "bnx2fc.h"
static void bnx2fc_upld_timer(unsigned long data);
static void bnx2fc_ofld_timer(unsigned long data);
static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
			   struct fcoe_port *port,
			   struct fc_rport_priv *rdata);
static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
				struct bnx2fc_rport *tgt);
static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
			      struct bnx2fc_rport *tgt);
static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
			      struct bnx2fc_rport *tgt);
static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);

static void bnx2fc_upld_timer(unsigned long data)
{

	struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;

	BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
	/* fake upload completion */
	clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
	set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
	wake_up_interruptible(&tgt->upld_wait);
}

static void bnx2fc_ofld_timer(unsigned long data)
{

	struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;

	BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
	/* NOTE: This function should never be called, as
	 * offload should never timeout
	 */
	/*
	 * If the timer has expired, this session is dead
	 * Clear offloaded flag and logout of this device.
	 * Since OFFLOADED flag is cleared, this case
	 * will be considered as offload error and the
	 * port will be logged off, and conn_id, session
	 * resources are freed up in bnx2fc_offload_session
	 */
	clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
	set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
	wake_up_interruptible(&tgt->ofld_wait);
}

static void bnx2fc_offload_session(struct fcoe_port *port,
					struct bnx2fc_rport *tgt,
					struct fc_rport_priv *rdata)
{
	struct fc_lport *lport = rdata->local_port;
	struct fc_rport *rport = rdata->rport;
	struct bnx2fc_interface *interface = port->priv;
	struct bnx2fc_hba *hba = interface->hba;
	int rval;
	int i = 0;

	/* Initialize bnx2fc_rport */
	/* NOTE: tgt is already bzero'd */
	rval = bnx2fc_init_tgt(tgt, port, rdata);
	if (rval) {
		printk(KERN_ERR PFX "Failed to allocate conn id for "
			"port_id (%6x)\n", rport->port_id);
		goto tgt_init_err;
	}

	/* Allocate session resources */
	rval = bnx2fc_alloc_session_resc(hba, tgt);
	if (rval) {
		printk(KERN_ERR PFX "Failed to allocate resources\n");
		goto ofld_err;
	}

	/*
	 * Initialize FCoE session offload process.
	 * Upon completion of offload process add
	 * rport to list of rports
	 */
retry_ofld:
	clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
	rval = bnx2fc_send_session_ofld_req(port, tgt);
	if (rval) {
		printk(KERN_ERR PFX "ofld_req failed\n");
		goto ofld_err;
	}

	/*
	 * wait for the session is offloaded and enabled. 3 Secs
	 * should be ample time for this process to complete.
	 */
	setup_timer(&tgt->ofld_timer, bnx2fc_ofld_timer, (unsigned long)tgt);
	mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);

	wait_event_interruptible(tgt->ofld_wait,
				 (test_bit(
				  BNX2FC_FLAG_OFLD_REQ_CMPL,
				  &tgt->flags)));
	if (signal_pending(current))
		flush_signals(current);

	del_timer_sync(&tgt->ofld_timer);

	if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
		if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
				       &tgt->flags)) {
			BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
				"retry ofld..%d\n", i++);
			msleep_interruptible(1000);
			if (i > 3) {
				i = 0;
				goto ofld_err;
			}
			goto retry_ofld;
		}
		goto ofld_err;
	}
	if (bnx2fc_map_doorbell(tgt)) {
		printk(KERN_ERR PFX "map doorbell failed - no mem\n");
		/* upload will take care of cleaning up sess resc */
		lport->tt.rport_logoff(rdata);
	}
	return;

ofld_err:
	/* couldn't offload the session. log off from this rport */
	BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
	/* Free session resources */
	bnx2fc_free_session_resc(hba, tgt);
tgt_init_err:
	if (tgt->fcoe_conn_id != -1)
		bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
	lport->tt.rport_logoff(rdata);
}

void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
{
	struct bnx2fc_cmd *io_req;
	struct list_head *list;
	struct list_head *tmp;
	int rc;
	int i = 0;
	BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
		       tgt->num_active_ios.counter);

	spin_lock_bh(&tgt->tgt_lock);
	tgt->flush_in_prog = 1;

	list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
		i++;
		io_req = (struct bnx2fc_cmd *)list;
		list_del_init(&io_req->link);
		io_req->on_active_queue = 0;
		BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");

		if (cancel_delayed_work(&io_req->timeout_work)) {
			if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
						&io_req->req_flags)) {
				/* Handle eh_abort timeout */
				BNX2FC_IO_DBG(io_req, "eh_abort for IO "
					      "cleaned up\n");
				complete(&io_req->tm_done);
			}
			kref_put(&io_req->refcount,
				 bnx2fc_cmd_release); /* drop timer hold */
		}

		set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
		set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
		rc = bnx2fc_initiate_cleanup(io_req);
		BUG_ON(rc);
	}

	list_for_each_safe(list, tmp, &tgt->els_queue) {
		i++;
		io_req = (struct bnx2fc_cmd *)list;
		list_del_init(&io_req->link);
		io_req->on_active_queue = 0;

		BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");

		if (cancel_delayed_work(&io_req->timeout_work))
			kref_put(&io_req->refcount,
				 bnx2fc_cmd_release); /* drop timer hold */

		if ((io_req->cb_func) && (io_req->cb_arg)) {
			io_req->cb_func(io_req->cb_arg);
			io_req->cb_arg = NULL;
		}

		rc = bnx2fc_initiate_cleanup(io_req);
		BUG_ON(rc);
	}

	list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
		i++;
		io_req = (struct bnx2fc_cmd *)list;
		list_del_init(&io_req->link);

		BNX2FC_IO_DBG(io_req, "retire_queue flush\n");

		if (cancel_delayed_work(&io_req->timeout_work))
			kref_put(&io_req->refcount, bnx2fc_cmd_release);

		clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
	}

	BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
	i = 0;
	spin_unlock_bh(&tgt->tgt_lock);
	/* wait for active_ios to go to 0 */
	while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
		msleep(25);
	if (tgt->num_active_ios.counter != 0)
		printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
				    " active_ios = %d\n",
			tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
	spin_lock_bh(&tgt->tgt_lock);
	tgt->flush_in_prog = 0;
	spin_unlock_bh(&tgt->tgt_lock);
}

static void bnx2fc_upload_session(struct fcoe_port *port,
					struct bnx2fc_rport *tgt)
{
	struct bnx2fc_interface *interface = port->priv;
	struct bnx2fc_hba *hba = interface->hba;

	BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
		tgt->num_active_ios.counter);

	/*
	 * Called with hba->hba_mutex held.
	 * This is a blocking call
	 */
	clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
	bnx2fc_send_session_disable_req(port, tgt);

	/*
	 * wait for upload to complete. 3 Secs
	 * should be sufficient time for this process to complete.
	 */
	setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
	mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);

	BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
	wait_event_interruptible(tgt->upld_wait,
				 (test_bit(
				  BNX2FC_FLAG_UPLD_REQ_COMPL,
				  &tgt->flags)));

	if (signal_pending(current))
		flush_signals(current);

	del_timer_sync(&tgt->upld_timer);

	/*
	 * traverse thru the active_q and tmf_q and cleanup
	 * IOs in these lists
	 */
	BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
		       tgt->flags);
	bnx2fc_flush_active_ios(tgt);

	/* Issue destroy KWQE */
	if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
		BNX2FC_TGT_DBG(tgt, "send destroy req\n");
		clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
		bnx2fc_send_session_destroy_req(hba, tgt);

		/* wait for destroy to complete */
		setup_timer(&tgt->upld_timer,
			    bnx2fc_upld_timer, (unsigned long)tgt);
		mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);

		wait_event_interruptible(tgt->upld_wait,
					 (test_bit(
					  BNX2FC_FLAG_UPLD_REQ_COMPL,
					  &tgt->flags)));

		if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
			printk(KERN_ERR PFX "ERROR!! destroy timed out\n");

		BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
			tgt->flags);
		if (signal_pending(current))
			flush_signals(current);

		del_timer_sync(&tgt->upld_timer);

	} else
		printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
				" not sent to FW\n");

	/* Free session resources */
	bnx2fc_free_session_resc(hba, tgt);
	bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
}

static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
			   struct fcoe_port *port,
			   struct fc_rport_priv *rdata)
{

	struct fc_rport *rport = rdata->rport;
	struct bnx2fc_interface *interface = port->priv;
	struct bnx2fc_hba *hba = interface->hba;
	struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
	struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;

	tgt->rport = rport;
	tgt->rdata = rdata;
	tgt->port = port;

	if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
		BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
		tgt->fcoe_conn_id = -1;
		return -1;
	}

	tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
	if (tgt->fcoe_conn_id == -1)
		return -1;

	BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);

	tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
	tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
	tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
	atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);

	/* Initialize the toggle bit */
	tgt->sq_curr_toggle_bit = 1;
	tgt->cq_curr_toggle_bit = 1;
	tgt->sq_prod_idx = 0;
	tgt->cq_cons_idx = 0;
	tgt->rq_prod_idx = 0x8000;
	tgt->rq_cons_idx = 0;
	atomic_set(&tgt->num_active_ios, 0);

	if (rdata->flags & FC_RP_FLAGS_RETRY) {
		tgt->dev_type = TYPE_TAPE;
		tgt->io_timeout = 0; /* use default ULP timeout */
	} else {
		tgt->dev_type = TYPE_DISK;
		tgt->io_timeout = BNX2FC_IO_TIMEOUT;
	}

	/* initialize sq doorbell */
	sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
	sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
					B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
	/* initialize rx doorbell */
	rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
			  (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
			  (B577XX_FCOE_CONNECTION_TYPE <<
				B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
	rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
		     (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);

	spin_lock_init(&tgt->tgt_lock);
	spin_lock_init(&tgt->cq_lock);

	/* Initialize active_cmd_queue list */
	INIT_LIST_HEAD(&tgt->active_cmd_queue);

	/* Initialize IO retire queue */
	INIT_LIST_HEAD(&tgt->io_retire_queue);

	INIT_LIST_HEAD(&tgt->els_queue);

	/* Initialize active_tm_queue list */
	INIT_LIST_HEAD(&tgt->active_tm_queue);

	init_waitqueue_head(&tgt->ofld_wait);
	init_waitqueue_head(&tgt->upld_wait);

	return 0;
}

/**
 * This event_callback is called after successful completion of libfc
 * initiated target login. bnx2fc can proceed with initiating the session
 * establishment.
 */
void bnx2fc_rport_event_handler(struct fc_lport *lport,
				struct fc_rport_priv *rdata,
				enum fc_rport_event event)
{
	struct fcoe_port *port = lport_priv(lport);
	struct bnx2fc_interface *interface = port->priv;
	struct bnx2fc_hba *hba = interface->hba;
	struct fc_rport *rport = rdata->rport;
	struct fc_rport_libfc_priv *rp;
	struct bnx2fc_rport *tgt;
	u32 port_id;

	BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
		event, rdata->ids.port_id);
	switch (event) {
	case RPORT_EV_READY:
		if (!rport) {
			printk(KERN_ERR PFX "rport is NULL: ERROR!\n");
			break;
		}

		rp = rport->dd_data;
		if (rport->port_id == FC_FID_DIR_SERV) {
			/*
			 * bnx2fc_rport structure doesn't exist for
			 * directory server.
			 * We should not come here, as lport will
			 * take care of fabric login
			 */
			printk(KERN_ERR PFX "%x - rport_event_handler ERROR\n",
				rdata->ids.port_id);
			break;
		}

		if (rdata->spp_type != FC_TYPE_FCP) {
			BNX2FC_HBA_DBG(lport, "not FCP type target."
				   " not offloading\n");
			break;
		}
		if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
			BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
				   " not offloading\n");
			break;
		}

		/*
		 * Offlaod process is protected with hba mutex.
		 * Use the same mutex_lock for upload process too
		 */
		mutex_lock(&hba->hba_mutex);
		tgt = (struct bnx2fc_rport *)&rp[1];

		/* This can happen when ADISC finds the same target */
		if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
			BNX2FC_TGT_DBG(tgt, "already offloaded\n");
			mutex_unlock(&hba->hba_mutex);
			return;
		}

		/*
		 * Offload the session. This is a blocking call, and will
		 * wait until the session is offloaded.
		 */
		bnx2fc_offload_session(port, tgt, rdata);

		BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
			hba->num_ofld_sess);

		if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
			/*
			 * Session is offloaded and enabled. Map
			 * doorbell register for this target
			 */
			BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
			/* This counter is protected with hba mutex */
			hba->num_ofld_sess++;

			set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
		} else {
			/*
			 * Offload or enable would have failed.
			 * In offload/enable completion path, the
			 * rport would have already been removed
			 */
			BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
				   "offloaded flag not set\n");
		}
		mutex_unlock(&hba->hba_mutex);
		break;
	case RPORT_EV_LOGO:
	case RPORT_EV_FAILED:
	case RPORT_EV_STOP:
		port_id = rdata->ids.port_id;
		if (port_id == FC_FID_DIR_SERV)
			break;

		if (!rport) {
			printk(KERN_INFO PFX "%x - rport not created Yet!!\n",
				port_id);
			break;
		}
		rp = rport->dd_data;
		mutex_lock(&hba->hba_mutex);
		/*
		 * Perform session upload. Note that rdata->peers is already
		 * removed from disc->rports list before we get this event.
		 */
		tgt = (struct bnx2fc_rport *)&rp[1];

		if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
			mutex_unlock(&hba->hba_mutex);
			break;
		}
		clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);

		bnx2fc_upload_session(port, tgt);
		hba->num_ofld_sess--;
		BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
			hba->num_ofld_sess);
		/*
		 * Try to wake up the linkdown wait thread. If num_ofld_sess
		 * is 0, the waiting therad wakes up
		 */
		if ((hba->wait_for_link_down) &&
		    (hba->num_ofld_sess == 0)) {
			wake_up_interruptible(&hba->shutdown_wait);
		}
		if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
			printk(KERN_ERR PFX "Relogin to the tgt\n");
			mutex_lock(&lport->disc.disc_mutex);
			lport->tt.rport_login(rdata);
			mutex_unlock(&lport->disc.disc_mutex);
		}
		mutex_unlock(&hba->hba_mutex);

		break;

	case RPORT_EV_NONE:
		break;
	}
}

/**
 * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
 *
 * @port:  fcoe_port struct to lookup the target port on
 * @port_id: The remote port ID to look up
 */
struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
					     u32 port_id)
{
	struct bnx2fc_interface *interface = port->priv;
	struct bnx2fc_hba *hba = interface->hba;
	struct bnx2fc_rport *tgt;
	struct fc_rport_priv *rdata;
	int i;

	for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
		tgt = hba->tgt_ofld_list[i];
		if ((tgt) && (tgt->port == port)) {
			rdata = tgt->rdata;
			if (rdata->ids.port_id == port_id) {
				if (rdata->rp_state != RPORT_ST_DELETE) {
					BNX2FC_TGT_DBG(tgt, "rport "
						"obtained\n");
					return tgt;
				} else {
					BNX2FC_TGT_DBG(tgt, "rport 0x%x "
						"is in DELETED state\n",
						rdata->ids.port_id);
					return NULL;
				}
			}
		}
	}
	return NULL;
}


/**
 * bnx2fc_alloc_conn_id - allocates FCOE Connection id
 *
 * @hba:	pointer to adapter structure
 * @tgt:	pointer to bnx2fc_rport structure
 */
static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
				struct bnx2fc_rport *tgt)
{
	u32 conn_id, next;

	/* called with hba mutex held */

	/*
	 * tgt_ofld_list access is synchronized using
	 * both hba mutex and hba lock. Atleast hba mutex or
	 * hba lock needs to be held for read access.
	 */

	spin_lock_bh(&hba->hba_lock);
	next = hba->next_conn_id;
	conn_id = hba->next_conn_id++;
	if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
		hba->next_conn_id = 0;

	while (hba->tgt_ofld_list[conn_id] != NULL) {
		conn_id++;
		if (conn_id == BNX2FC_NUM_MAX_SESS)
			conn_id = 0;

		if (conn_id == next) {
			/* No free conn_ids are available */
			spin_unlock_bh(&hba->hba_lock);
			return -1;
		}
	}
	hba->tgt_ofld_list[conn_id] = tgt;
	tgt->fcoe_conn_id = conn_id;
	spin_unlock_bh(&hba->hba_lock);
	return conn_id;
}

static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
{
	/* called with hba mutex held */
	spin_lock_bh(&hba->hba_lock);
	hba->tgt_ofld_list[conn_id] = NULL;
	spin_unlock_bh(&hba->hba_lock);
}

/**
 *bnx2fc_alloc_session_resc - Allocate qp resources for the session
 *
 */
static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
					struct bnx2fc_rport *tgt)
{
	dma_addr_t page;
	int num_pages;
	u32 *pbl;

	/* Allocate and map SQ */
	tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
	tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
				     &tgt->sq_dma, GFP_KERNEL);
	if (!tgt->sq) {
		printk(KERN_ERR PFX "unable to allocate SQ memory %d\n",
			tgt->sq_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->sq, 0, tgt->sq_mem_size);

	/* Allocate and map CQ */
	tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
	tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
				     &tgt->cq_dma, GFP_KERNEL);
	if (!tgt->cq) {
		printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
			tgt->cq_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->cq, 0, tgt->cq_mem_size);

	/* Allocate and map RQ and RQ PBL */
	tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
	tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
					&tgt->rq_dma, GFP_KERNEL);
	if (!tgt->rq) {
		printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
			tgt->rq_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->rq, 0, tgt->rq_mem_size);

	tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
	tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
					 &tgt->rq_pbl_dma, GFP_KERNEL);
	if (!tgt->rq_pbl) {
		printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
			tgt->rq_pbl_size);
		goto mem_alloc_failure;
	}

	memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
	num_pages = tgt->rq_mem_size / PAGE_SIZE;
	page = tgt->rq_dma;
	pbl = (u32 *)tgt->rq_pbl;

	while (num_pages--) {
		*pbl = (u32)page;
		pbl++;
		*pbl = (u32)((u64)page >> 32);
		pbl++;
		page += PAGE_SIZE;
	}

	/* Allocate and map XFERQ */
	tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
	tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
			       PAGE_MASK;

	tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
					&tgt->xferq_dma, GFP_KERNEL);
	if (!tgt->xferq) {
		printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
			tgt->xferq_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->xferq, 0, tgt->xferq_mem_size);

	/* Allocate and map CONFQ & CONFQ PBL */
	tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
	tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
			       PAGE_MASK;

	tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
					&tgt->confq_dma, GFP_KERNEL);
	if (!tgt->confq) {
		printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
			tgt->confq_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->confq, 0, tgt->confq_mem_size);

	tgt->confq_pbl_size =
		(tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
	tgt->confq_pbl_size =
		(tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;

	tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
					    tgt->confq_pbl_size,
					    &tgt->confq_pbl_dma, GFP_KERNEL);
	if (!tgt->confq_pbl) {
		printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
			tgt->confq_pbl_size);
		goto mem_alloc_failure;
	}

	memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
	num_pages = tgt->confq_mem_size / PAGE_SIZE;
	page = tgt->confq_dma;
	pbl = (u32 *)tgt->confq_pbl;

	while (num_pages--) {
		*pbl = (u32)page;
		pbl++;
		*pbl = (u32)((u64)page >> 32);
		pbl++;
		page += PAGE_SIZE;
	}

	/* Allocate and map ConnDB */
	tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);

	tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
					  tgt->conn_db_mem_size,
					  &tgt->conn_db_dma, GFP_KERNEL);
	if (!tgt->conn_db) {
		printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
						tgt->conn_db_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->conn_db, 0, tgt->conn_db_mem_size);


	/* Allocate and map LCQ */
	tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
	tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
			     PAGE_MASK;

	tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
				      &tgt->lcq_dma, GFP_KERNEL);

	if (!tgt->lcq) {
		printk(KERN_ERR PFX "unable to allocate lcq %d\n",
		       tgt->lcq_mem_size);
		goto mem_alloc_failure;
	}
	memset(tgt->lcq, 0, tgt->lcq_mem_size);

	tgt->conn_db->rq_prod = 0x8000;

	return 0;

mem_alloc_failure:
	return -ENOMEM;
}

/**
 * bnx2i_free_session_resc - free qp resources for the session
 *
 * @hba:	adapter structure pointer
 * @tgt:	bnx2fc_rport structure pointer
 *
 * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 */
static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
						struct bnx2fc_rport *tgt)
{
	void __iomem *ctx_base_ptr;

	BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");

	spin_lock_bh(&tgt->cq_lock);
	ctx_base_ptr = tgt->ctx_base;
	tgt->ctx_base = NULL;

	/* Free LCQ */
	if (tgt->lcq) {
		dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
				    tgt->lcq, tgt->lcq_dma);
		tgt->lcq = NULL;
	}
	/* Free connDB */
	if (tgt->conn_db) {
		dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
				    tgt->conn_db, tgt->conn_db_dma);
		tgt->conn_db = NULL;
	}
	/* Free confq  and confq pbl */
	if (tgt->confq_pbl) {
		dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
				    tgt->confq_pbl, tgt->confq_pbl_dma);
		tgt->confq_pbl = NULL;
	}
	if (tgt->confq) {
		dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
				    tgt->confq, tgt->confq_dma);
		tgt->confq = NULL;
	}
	/* Free XFERQ */
	if (tgt->xferq) {
		dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
				    tgt->xferq, tgt->xferq_dma);
		tgt->xferq = NULL;
	}
	/* Free RQ PBL and RQ */
	if (tgt->rq_pbl) {
		dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
				    tgt->rq_pbl, tgt->rq_pbl_dma);
		tgt->rq_pbl = NULL;
	}
	if (tgt->rq) {
		dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
				    tgt->rq, tgt->rq_dma);
		tgt->rq = NULL;
	}
	/* Free CQ */
	if (tgt->cq) {
		dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
				    tgt->cq, tgt->cq_dma);
		tgt->cq = NULL;
	}
	/* Free SQ */
	if (tgt->sq) {
		dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
				    tgt->sq, tgt->sq_dma);
		tgt->sq = NULL;
	}
	spin_unlock_bh(&tgt->cq_lock);

	if (ctx_base_ptr)
		iounmap(ctx_base_ptr);
}