summaryrefslogtreecommitdiff
path: root/drivers/scsi/fnic/fnic_main.c
blob: 0044717d4486c68ec998d015aa6380b9010da19f (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
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */
#include <linux/module.h>
#include <linux/mempool.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/if_ether.h>
#include <linux/blk-mq-pci.h>
#include <scsi/fc/fc_fip.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi_tcq.h>
#include <scsi/libfc.h>
#include <scsi/fc_frame.h>

#include "vnic_dev.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "fnic_io.h"
#include "fnic_fip.h"
#include "fnic.h"

#define PCI_DEVICE_ID_CISCO_FNIC	0x0045

/* Timer to poll notification area for events. Used for MSI interrupts */
#define FNIC_NOTIFY_TIMER_PERIOD	(2 * HZ)

static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
static struct kmem_cache *fnic_io_req_cache;
static LIST_HEAD(fnic_list);
static DEFINE_SPINLOCK(fnic_list_lock);
static DEFINE_IDA(fnic_ida);

/* Supported devices by fnic module */
static struct pci_device_id fnic_id_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
	{ 0, }
};

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
	      "Joseph R. Eykholt <jeykholt@cisco.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, fnic_id_table);

unsigned int fnic_log_level;
module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");


unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS;
module_param(io_completions, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time");

unsigned int fnic_trace_max_pages = 16;
module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
					"for fnic trace buffer");

unsigned int fnic_fc_trace_max_pages = 64;
module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_fc_trace_max_pages,
		 "Total allocated memory pages for fc trace buffer");

static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");

static struct libfc_function_template fnic_transport_template = {
	.frame_send = fnic_send,
	.lport_set_port_id = fnic_set_port_id,
	.fcp_abort_io = fnic_empty_scsi_cleanup,
	.fcp_cleanup = fnic_empty_scsi_cleanup,
	.exch_mgr_reset = fnic_exch_mgr_reset
};

static int fnic_slave_alloc(struct scsi_device *sdev)
{
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));

	if (!rport || fc_remote_port_chkready(rport))
		return -ENXIO;

	scsi_change_queue_depth(sdev, fnic_max_qdepth);
	return 0;
}

static const struct scsi_host_template fnic_host_template = {
	.module = THIS_MODULE,
	.name = DRV_NAME,
	.queuecommand = fnic_queuecommand,
	.eh_timed_out = fc_eh_timed_out,
	.eh_abort_handler = fnic_abort_cmd,
	.eh_device_reset_handler = fnic_device_reset,
	.eh_host_reset_handler = fnic_host_reset,
	.slave_alloc = fnic_slave_alloc,
	.change_queue_depth = scsi_change_queue_depth,
	.this_id = -1,
	.cmd_per_lun = 3,
	.can_queue = FNIC_DFLT_IO_REQ,
	.sg_tablesize = FNIC_MAX_SG_DESC_CNT,
	.max_sectors = 0xffff,
	.shost_groups = fnic_host_groups,
	.track_queue_depth = 1,
	.cmd_size = sizeof(struct fnic_cmd_priv),
	.map_queues = fnic_mq_map_queues_cpus,
};

static void
fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
{
	if (timeout)
		rport->dev_loss_tmo = timeout;
	else
		rport->dev_loss_tmo = 1;
}

static void fnic_get_host_speed(struct Scsi_Host *shost);
static struct scsi_transport_template *fnic_fc_transport;
static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
static void fnic_reset_host_stats(struct Scsi_Host *);

static struct fc_function_template fnic_fc_functions = {

	.show_host_node_name = 1,
	.show_host_port_name = 1,
	.show_host_supported_classes = 1,
	.show_host_supported_fc4s = 1,
	.show_host_active_fc4s = 1,
	.show_host_maxframe_size = 1,
	.show_host_port_id = 1,
	.show_host_supported_speeds = 1,
	.get_host_speed = fnic_get_host_speed,
	.show_host_speed = 1,
	.show_host_port_type = 1,
	.get_host_port_state = fc_get_host_port_state,
	.show_host_port_state = 1,
	.show_host_symbolic_name = 1,
	.show_rport_maxframe_size = 1,
	.show_rport_supported_classes = 1,
	.show_host_fabric_name = 1,
	.show_starget_node_name = 1,
	.show_starget_port_name = 1,
	.show_starget_port_id = 1,
	.show_rport_dev_loss_tmo = 1,
	.set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
	.issue_fc_host_lip = fnic_reset,
	.get_fc_host_stats = fnic_get_stats,
	.reset_fc_host_stats = fnic_reset_host_stats,
	.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
	.terminate_rport_io = fnic_terminate_rport_io,
	.bsg_request = fc_lport_bsg_request,
};

static void fnic_get_host_speed(struct Scsi_Host *shost)
{
	struct fc_lport *lp = shost_priv(shost);
	struct fnic *fnic = lport_priv(lp);
	u32 port_speed = vnic_dev_port_speed(fnic->vdev);

	/* Add in other values as they get defined in fw */
	switch (port_speed) {
	case DCEM_PORTSPEED_10G:
		fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
		break;
	case DCEM_PORTSPEED_20G:
		fc_host_speed(shost) = FC_PORTSPEED_20GBIT;
		break;
	case DCEM_PORTSPEED_25G:
		fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
		break;
	case DCEM_PORTSPEED_40G:
	case DCEM_PORTSPEED_4x10G:
		fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
		break;
	case DCEM_PORTSPEED_100G:
		fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
		break;
	default:
		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
		break;
	}
}

static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
{
	int ret;
	struct fc_lport *lp = shost_priv(host);
	struct fnic *fnic = lport_priv(lp);
	struct fc_host_statistics *stats = &lp->host_stats;
	struct vnic_stats *vs;
	unsigned long flags;

	if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
		return stats;
	fnic->stats_time = jiffies;

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	if (ret) {
		FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
			      "fnic: Get vnic stats failed"
			      " 0x%x", ret);
		return stats;
	}
	vs = fnic->stats;
	stats->tx_frames = vs->tx.tx_unicast_frames_ok;
	stats->tx_words  = vs->tx.tx_unicast_bytes_ok / 4;
	stats->rx_frames = vs->rx.rx_unicast_frames_ok;
	stats->rx_words  = vs->rx.rx_unicast_bytes_ok / 4;
	stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
	stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
	stats->invalid_crc_count = vs->rx.rx_crc_errors;
	stats->seconds_since_last_reset =
			(jiffies - fnic->stats_reset_time) / HZ;
	stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
	stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);

	return stats;
}

/*
 * fnic_dump_fchost_stats
 * note : dumps fc_statistics into system logs
 */
void fnic_dump_fchost_stats(struct Scsi_Host *host,
				struct fc_host_statistics *stats)
{
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: seconds since last reset = %llu\n",
			stats->seconds_since_last_reset);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: tx frames		= %llu\n",
			stats->tx_frames);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: tx words		= %llu\n",
			stats->tx_words);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: rx frames		= %llu\n",
			stats->rx_frames);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: rx words		= %llu\n",
			stats->rx_words);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: lip count		= %llu\n",
			stats->lip_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: nos count		= %llu\n",
			stats->nos_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: error frames		= %llu\n",
			stats->error_frames);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: dumped frames	= %llu\n",
			stats->dumped_frames);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: link failure count	= %llu\n",
			stats->link_failure_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: loss of sync count	= %llu\n",
			stats->loss_of_sync_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: loss of signal count	= %llu\n",
			stats->loss_of_signal_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: prim seq protocol err count = %llu\n",
			stats->prim_seq_protocol_err_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: invalid tx word count= %llu\n",
			stats->invalid_tx_word_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: invalid crc count	= %llu\n",
			stats->invalid_crc_count);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: fcp input requests	= %llu\n",
			stats->fcp_input_requests);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: fcp output requests	= %llu\n",
			stats->fcp_output_requests);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: fcp control requests	= %llu\n",
			stats->fcp_control_requests);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: fcp input megabytes	= %llu\n",
			stats->fcp_input_megabytes);
	FNIC_MAIN_NOTE(KERN_NOTICE, host,
			"fnic: fcp output megabytes	= %llu\n",
			stats->fcp_output_megabytes);
	return;
}

/*
 * fnic_reset_host_stats : clears host stats
 * note : called when reset_statistics set under sysfs dir
 */
static void fnic_reset_host_stats(struct Scsi_Host *host)
{
	int ret;
	struct fc_lport *lp = shost_priv(host);
	struct fnic *fnic = lport_priv(lp);
	struct fc_host_statistics *stats;
	unsigned long flags;

	/* dump current stats, before clearing them */
	stats = fnic_get_stats(host);
	fnic_dump_fchost_stats(host, stats);

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	ret = vnic_dev_stats_clear(fnic->vdev);
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	if (ret) {
		FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
				"fnic: Reset vnic stats failed"
				" 0x%x", ret);
		return;
	}
	fnic->stats_reset_time = jiffies;
	memset(stats, 0, sizeof(*stats));

	return;
}

void fnic_log_q_error(struct fnic *fnic)
{
	unsigned int i;
	u32 error_status;

	for (i = 0; i < fnic->raw_wq_count; i++) {
		error_status = ioread32(&fnic->wq[i].ctrl->error_status);
		if (error_status)
			shost_printk(KERN_ERR, fnic->lport->host,
				     "WQ[%d] error_status"
				     " %d\n", i, error_status);
	}

	for (i = 0; i < fnic->rq_count; i++) {
		error_status = ioread32(&fnic->rq[i].ctrl->error_status);
		if (error_status)
			shost_printk(KERN_ERR, fnic->lport->host,
				     "RQ[%d] error_status"
				     " %d\n", i, error_status);
	}

	for (i = 0; i < fnic->wq_copy_count; i++) {
		error_status = ioread32(&fnic->hw_copy_wq[i].ctrl->error_status);
		if (error_status)
			shost_printk(KERN_ERR, fnic->lport->host,
				     "CWQ[%d] error_status"
				     " %d\n", i, error_status);
	}
}

void fnic_handle_link_event(struct fnic *fnic)
{
	unsigned long flags;

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	if (fnic->stop_rx_link_events) {
		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
		return;
	}
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	queue_work(fnic_event_queue, &fnic->link_work);

}

static int fnic_notify_set(struct fnic *fnic)
{
	int err;

	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		err = vnic_dev_notify_set(fnic->vdev, -1);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		err = vnic_dev_notify_set(fnic->vdev, fnic->wq_copy_count + fnic->copy_wq_base);
		break;
	default:
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Interrupt mode should be set up"
			     " before devcmd notify set %d\n",
			     vnic_dev_get_intr_mode(fnic->vdev));
		err = -1;
		break;
	}

	return err;
}

static void fnic_notify_timer(struct timer_list *t)
{
	struct fnic *fnic = from_timer(fnic, t, notify_timer);

	fnic_handle_link_event(fnic);
	mod_timer(&fnic->notify_timer,
		  round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
}

static void fnic_fip_notify_timer(struct timer_list *t)
{
	struct fnic *fnic = from_timer(fnic, t, fip_timer);

	fnic_handle_fip_timer(fnic);
}

static void fnic_notify_timer_start(struct fnic *fnic)
{
	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
	case VNIC_DEV_INTR_MODE_MSI:
		/*
		 * Schedule first timeout immediately. The driver is
		 * initiatialized and ready to look for link up notification
		 */
		mod_timer(&fnic->notify_timer, jiffies);
		break;
	default:
		/* Using intr for notification for INTx/MSI-X */
		break;
	}
}

static int fnic_dev_wait(struct vnic_dev *vdev,
			 int (*start)(struct vnic_dev *, int),
			 int (*finished)(struct vnic_dev *, int *),
			 int arg)
{
	unsigned long time;
	int done;
	int err;
	int count;

	count = 0;

	err = start(vdev, arg);
	if (err)
		return err;

	/* Wait for func to complete.
	* Sometime schedule_timeout_uninterruptible take long time
	* to wake up so we do not retry as we are only waiting for
	* 2 seconds in while loop. By adding count, we make sure
	* we try atleast three times before returning -ETIMEDOUT
	*/
	time = jiffies + (HZ * 2);
	do {
		err = finished(vdev, &done);
		count++;
		if (err)
			return err;
		if (done)
			return 0;
		schedule_timeout_uninterruptible(HZ / 10);
	} while (time_after(time, jiffies) || (count < 3));

	return -ETIMEDOUT;
}

static int fnic_cleanup(struct fnic *fnic)
{
	unsigned int i;
	int err;
	int raw_wq_rq_counts;

	vnic_dev_disable(fnic->vdev);
	for (i = 0; i < fnic->intr_count; i++)
		vnic_intr_mask(&fnic->intr[i]);

	for (i = 0; i < fnic->rq_count; i++) {
		err = vnic_rq_disable(&fnic->rq[i]);
		if (err)
			return err;
	}
	for (i = 0; i < fnic->raw_wq_count; i++) {
		err = vnic_wq_disable(&fnic->wq[i]);
		if (err)
			return err;
	}
	for (i = 0; i < fnic->wq_copy_count; i++) {
		err = vnic_wq_copy_disable(&fnic->hw_copy_wq[i]);
		if (err)
			return err;
		raw_wq_rq_counts = fnic->raw_wq_count + fnic->rq_count;
		fnic_wq_copy_cmpl_handler(fnic, -1, i + raw_wq_rq_counts);
	}

	/* Clean up completed IOs and FCS frames */
	fnic_wq_cmpl_handler(fnic, -1);
	fnic_rq_cmpl_handler(fnic, -1);

	/* Clean up the IOs and FCS frames that have not completed */
	for (i = 0; i < fnic->raw_wq_count; i++)
		vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
	for (i = 0; i < fnic->rq_count; i++)
		vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
	for (i = 0; i < fnic->wq_copy_count; i++)
		vnic_wq_copy_clean(&fnic->hw_copy_wq[i],
				   fnic_wq_copy_cleanup_handler);

	for (i = 0; i < fnic->cq_count; i++)
		vnic_cq_clean(&fnic->cq[i]);
	for (i = 0; i < fnic->intr_count; i++)
		vnic_intr_clean(&fnic->intr[i]);

	mempool_destroy(fnic->io_req_pool);
	for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
		mempool_destroy(fnic->io_sgl_pool[i]);

	return 0;
}

static void fnic_iounmap(struct fnic *fnic)
{
	if (fnic->bar0.vaddr)
		iounmap(fnic->bar0.vaddr);
}

/**
 * fnic_get_mac() - get assigned data MAC address for FIP code.
 * @lport: 	local port.
 */
static u8 *fnic_get_mac(struct fc_lport *lport)
{
	struct fnic *fnic = lport_priv(lport);

	return fnic->data_src_addr;
}

static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
{
	vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
}

static int fnic_scsi_drv_init(struct fnic *fnic)
{
	struct Scsi_Host *host = fnic->lport->host;

	/* Configure maximum outstanding IO reqs*/
	if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD)
		host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
					max_t(u32, FNIC_MIN_IO_REQ,
					fnic->config.io_throttle_count));

	fnic->fnic_max_tag_id = host->can_queue;
	host->max_lun = fnic->config.luns_per_tgt;
	host->max_id = FNIC_MAX_FCP_TARGET;
	host->max_cmd_len = FCOE_MAX_CMD_LEN;

	host->nr_hw_queues = fnic->wq_copy_count;

	shost_printk(KERN_INFO, host,
			"fnic: can_queue: %d max_lun: %llu",
			host->can_queue, host->max_lun);

	shost_printk(KERN_INFO, host,
			"fnic: max_id: %d max_cmd_len: %d nr_hw_queues: %d",
			host->max_id, host->max_cmd_len, host->nr_hw_queues);

	return 0;
}

void fnic_mq_map_queues_cpus(struct Scsi_Host *host)
{
	struct fc_lport *lp = shost_priv(host);
	struct fnic *fnic = lport_priv(lp);
	struct pci_dev *l_pdev = fnic->pdev;
	int intr_mode = fnic->config.intr_mode;
	struct blk_mq_queue_map *qmap = &host->tag_set.map[HCTX_TYPE_DEFAULT];

	if (intr_mode == VNIC_DEV_INTR_MODE_MSI || intr_mode == VNIC_DEV_INTR_MODE_INTX) {
		FNIC_MAIN_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
			"intr_mode is not msix\n");
		return;
	}

	FNIC_MAIN_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
			"qmap->nr_queues: %d\n", qmap->nr_queues);

	if (l_pdev == NULL) {
		FNIC_MAIN_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
						"l_pdev is null\n");
		return;
	}

	blk_mq_pci_map_queues(qmap, l_pdev, FNIC_PCI_OFFSET);
}

static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct Scsi_Host *host;
	struct fc_lport *lp;
	struct fnic *fnic;
	mempool_t *pool;
	int err = 0;
	int fnic_id = 0;
	int i;
	unsigned long flags;
	int hwq;

	/*
	 * Allocate SCSI Host and set up association between host,
	 * local port, and fnic
	 */
	lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
	if (!lp) {
		printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
		err = -ENOMEM;
		goto err_out;
	}

	host = lp->host;
	fnic = lport_priv(lp);

	fnic_id = ida_alloc(&fnic_ida, GFP_KERNEL);
	if (fnic_id < 0) {
		pr_err("Unable to alloc fnic ID\n");
		err = fnic_id;
		goto err_out_ida_alloc;
	}
	fnic->lport = lp;
	fnic->ctlr.lp = lp;
	fnic->link_events = 0;
	fnic->pdev = pdev;

	snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
		 host->host_no);

	host->transportt = fnic_fc_transport;
	fnic->fnic_num = fnic_id;
	fnic_stats_debugfs_init(fnic);

	err = pci_enable_device(pdev);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Cannot enable PCI device, aborting.\n");
		goto err_out_free_hba;
	}

	err = pci_request_regions(pdev, DRV_NAME);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Cannot enable PCI resources, aborting\n");
		goto err_out_disable_device;
	}

	pci_set_master(pdev);

	/* Query PCI controller on system for DMA addressing
	 * limitation for the device.  Try 47-bit first, and
	 * fail to 32-bit. Cisco VIC supports 47 bits only.
	 */
	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47));
	if (err) {
		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
		if (err) {
			shost_printk(KERN_ERR, fnic->lport->host,
				     "No usable DMA configuration "
				     "aborting\n");
			goto err_out_release_regions;
		}
	}

	/* Map vNIC resources from BAR0 */
	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "BAR0 not memory-map'able, aborting.\n");
		err = -ENODEV;
		goto err_out_release_regions;
	}

	fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
	fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
	fnic->bar0.len = pci_resource_len(pdev, 0);

	if (!fnic->bar0.vaddr) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Cannot memory-map BAR0 res hdr, "
			     "aborting.\n");
		err = -ENODEV;
		goto err_out_release_regions;
	}

	fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
	if (!fnic->vdev) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC registration failed, "
			     "aborting.\n");
		err = -ENODEV;
		goto err_out_iounmap;
	}

	err = vnic_dev_cmd_init(fnic->vdev);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
				"vnic_dev_cmd_init() returns %d, aborting\n",
				err);
		goto err_out_vnic_unregister;
	}

	err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
			    vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC dev open failed, aborting.\n");
		goto err_out_dev_cmd_deinit;
	}

	err = vnic_dev_init(fnic->vdev, 0);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC dev init failed, aborting.\n");
		goto err_out_dev_close;
	}

	err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC get MAC addr failed \n");
		goto err_out_dev_close;
	}
	/* set data_src for point-to-point mode and to keep it non-zero */
	memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);

	/* Get vNIC configuration */
	err = fnic_get_vnic_config(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Get vNIC configuration failed, "
			     "aborting.\n");
		goto err_out_dev_close;
	}

	/* Setup PCI resources */
	pci_set_drvdata(pdev, fnic);

	fnic_get_res_counts(fnic);

	err = fnic_set_intr_mode(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Failed to set intr mode, "
			     "aborting.\n");
		goto err_out_dev_close;
	}

	err = fnic_alloc_vnic_resources(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Failed to alloc vNIC resources, "
			     "aborting.\n");
		goto err_out_clear_intr;
	}

	fnic_scsi_drv_init(fnic);

	for (hwq = 0; hwq < fnic->wq_copy_count; hwq++) {
		fnic->sw_copy_wq[hwq].ioreq_table_size = fnic->fnic_max_tag_id;
		fnic->sw_copy_wq[hwq].io_req_table =
					kzalloc((fnic->sw_copy_wq[hwq].ioreq_table_size + 1) *
					sizeof(struct fnic_io_req *), GFP_KERNEL);
	}
	shost_printk(KERN_INFO, fnic->lport->host, "fnic copy wqs: %d, Q0 ioreq table size: %d\n",
			fnic->wq_copy_count, fnic->sw_copy_wq[0].ioreq_table_size);

	/* initialize all fnic locks */
	spin_lock_init(&fnic->fnic_lock);

	for (i = 0; i < FNIC_WQ_MAX; i++)
		spin_lock_init(&fnic->wq_lock[i]);

	for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
		spin_lock_init(&fnic->wq_copy_lock[i]);
		fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
		fnic->fw_ack_recd[i] = 0;
		fnic->fw_ack_index[i] = -1;
	}

	err = -ENOMEM;
	fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
	if (!fnic->io_req_pool)
		goto err_out_free_resources;

	pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
	if (!pool)
		goto err_out_free_ioreq_pool;
	fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;

	pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
	if (!pool)
		goto err_out_free_dflt_pool;
	fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;

	/* setup vlan config, hw inserts vlan header */
	fnic->vlan_hw_insert = 1;
	fnic->vlan_id = 0;

	/* Initialize the FIP fcoe_ctrl struct */
	fnic->ctlr.send = fnic_eth_send;
	fnic->ctlr.update_mac = fnic_update_mac;
	fnic->ctlr.get_src_addr = fnic_get_mac;
	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
		shost_printk(KERN_INFO, fnic->lport->host,
			     "firmware supports FIP\n");
		/* enable directed and multicast */
		vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
		vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
		vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
		fnic->set_vlan = fnic_set_vlan;
		fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
		timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);
		spin_lock_init(&fnic->vlans_lock);
		INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
		INIT_WORK(&fnic->event_work, fnic_handle_event);
		INIT_WORK(&fnic->flush_work, fnic_flush_tx);
		skb_queue_head_init(&fnic->fip_frame_queue);
		INIT_LIST_HEAD(&fnic->evlist);
		INIT_LIST_HEAD(&fnic->vlans);
	} else {
		shost_printk(KERN_INFO, fnic->lport->host,
			     "firmware uses non-FIP mode\n");
		fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
		fnic->ctlr.state = FIP_ST_NON_FIP;
	}
	fnic->state = FNIC_IN_FC_MODE;

	atomic_set(&fnic->in_flight, 0);
	fnic->state_flags = FNIC_FLAGS_NONE;

	/* Enable hardware stripping of vlan header on ingress */
	fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);

	/* Setup notification buffer area */
	err = fnic_notify_set(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Failed to alloc notify buffer, aborting.\n");
		goto err_out_free_max_pool;
	}

	/* Setup notify timer when using MSI interrupts */
	if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
		timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);

	/* allocate RQ buffers and post them to RQ*/
	for (i = 0; i < fnic->rq_count; i++) {
		err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
		if (err) {
			shost_printk(KERN_ERR, fnic->lport->host,
				     "fnic_alloc_rq_frame can't alloc "
				     "frame\n");
			goto err_out_rq_buf;
		}
	}

	/* Enable all queues */
	for (i = 0; i < fnic->raw_wq_count; i++)
		vnic_wq_enable(&fnic->wq[i]);
	for (i = 0; i < fnic->rq_count; i++) {
		if (!ioread32(&fnic->rq[i].ctrl->enable))
			vnic_rq_enable(&fnic->rq[i]);
	}
	for (i = 0; i < fnic->wq_copy_count; i++)
		vnic_wq_copy_enable(&fnic->hw_copy_wq[i]);

	err = fnic_request_intr(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Unable to request irq.\n");
		goto err_out_request_intr;
	}

	/*
	 * Initialization done with PCI system, hardware, firmware.
	 * Add host to SCSI
	 */
	err = scsi_add_host(lp->host, &pdev->dev);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "fnic: scsi_add_host failed...exiting\n");
		goto err_out_scsi_add_host;
	}


	/* Start local port initiatialization */

	lp->link_up = 0;

	lp->max_retry_count = fnic->config.flogi_retries;
	lp->max_rport_retry_count = fnic->config.plogi_retries;
	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
			      FCP_SPPF_CONF_COMPL);
	if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
		lp->service_params |= FCP_SPPF_RETRY;

	lp->boot_time = jiffies;
	lp->e_d_tov = fnic->config.ed_tov;
	lp->r_a_tov = fnic->config.ra_tov;
	lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
	fc_set_wwnn(lp, fnic->config.node_wwn);
	fc_set_wwpn(lp, fnic->config.port_wwn);

	fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);

	if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
			       FCPIO_HOST_EXCH_RANGE_END, NULL)) {
		err = -ENOMEM;
		goto err_out_fc_exch_mgr_alloc;
	}

	fc_lport_init_stats(lp);
	fnic->stats_reset_time = jiffies;

	fc_lport_config(lp);

	if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
		       sizeof(struct fc_frame_header))) {
		err = -EINVAL;
		goto err_out_free_exch_mgr;
	}
	fc_host_maxframe_size(lp->host) = lp->mfs;
	fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;

	sprintf(fc_host_symbolic_name(lp->host),
		DRV_NAME " v" DRV_VERSION " over %s", fnic->name);

	spin_lock_irqsave(&fnic_list_lock, flags);
	list_add_tail(&fnic->list, &fnic_list);
	spin_unlock_irqrestore(&fnic_list_lock, flags);

	INIT_WORK(&fnic->link_work, fnic_handle_link);
	INIT_WORK(&fnic->frame_work, fnic_handle_frame);
	skb_queue_head_init(&fnic->frame_queue);
	skb_queue_head_init(&fnic->tx_queue);

	fc_fabric_login(lp);

	vnic_dev_enable(fnic->vdev);

	for (i = 0; i < fnic->intr_count; i++)
		vnic_intr_unmask(&fnic->intr[i]);

	fnic_notify_timer_start(fnic);

	return 0;

err_out_free_exch_mgr:
	fc_exch_mgr_free(lp);
err_out_fc_exch_mgr_alloc:
	fc_remove_host(lp->host);
	scsi_remove_host(lp->host);
err_out_scsi_add_host:
	fnic_free_intr(fnic);
err_out_request_intr:
	for (i = 0; i < fnic->rq_count; i++)
		vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
err_out_rq_buf:
	vnic_dev_notify_unset(fnic->vdev);
err_out_free_max_pool:
	mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
err_out_free_dflt_pool:
	mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
err_out_free_ioreq_pool:
	mempool_destroy(fnic->io_req_pool);
err_out_free_resources:
	for (hwq = 0; hwq < fnic->wq_copy_count; hwq++)
		kfree(fnic->sw_copy_wq[hwq].io_req_table);
	fnic_free_vnic_resources(fnic);
err_out_clear_intr:
	fnic_clear_intr_mode(fnic);
err_out_dev_close:
	vnic_dev_close(fnic->vdev);
err_out_dev_cmd_deinit:
err_out_vnic_unregister:
	vnic_dev_unregister(fnic->vdev);
err_out_iounmap:
	fnic_iounmap(fnic);
err_out_release_regions:
	pci_release_regions(pdev);
err_out_disable_device:
	pci_disable_device(pdev);
err_out_free_hba:
	fnic_stats_debugfs_remove(fnic);
	ida_free(&fnic_ida, fnic->fnic_num);
err_out_ida_alloc:
	scsi_host_put(lp->host);
err_out:
	return err;
}

static void fnic_remove(struct pci_dev *pdev)
{
	struct fnic *fnic = pci_get_drvdata(pdev);
	struct fc_lport *lp = fnic->lport;
	unsigned long flags;
	int hwq;

	/*
	 * Mark state so that the workqueue thread stops forwarding
	 * received frames and link events to the local port. ISR and
	 * other threads that can queue work items will also stop
	 * creating work items on the fnic workqueue
	 */
	spin_lock_irqsave(&fnic->fnic_lock, flags);
	fnic->stop_rx_link_events = 1;
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
		del_timer_sync(&fnic->notify_timer);

	/*
	 * Flush the fnic event queue. After this call, there should
	 * be no event queued for this fnic device in the workqueue
	 */
	flush_workqueue(fnic_event_queue);
	skb_queue_purge(&fnic->frame_queue);
	skb_queue_purge(&fnic->tx_queue);

	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
		del_timer_sync(&fnic->fip_timer);
		skb_queue_purge(&fnic->fip_frame_queue);
		fnic_fcoe_reset_vlans(fnic);
		fnic_fcoe_evlist_free(fnic);
	}

	/*
	 * Log off the fabric. This stops all remote ports, dns port,
	 * logs off the fabric. This flushes all rport, disc, lport work
	 * before returning
	 */
	fc_fabric_logoff(fnic->lport);

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	fnic->in_remove = 1;
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	fcoe_ctlr_destroy(&fnic->ctlr);
	fc_lport_destroy(lp);
	fnic_stats_debugfs_remove(fnic);

	/*
	 * This stops the fnic device, masks all interrupts. Completed
	 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
	 * cleaned up
	 */
	fnic_cleanup(fnic);

	BUG_ON(!skb_queue_empty(&fnic->frame_queue));
	BUG_ON(!skb_queue_empty(&fnic->tx_queue));

	spin_lock_irqsave(&fnic_list_lock, flags);
	list_del(&fnic->list);
	spin_unlock_irqrestore(&fnic_list_lock, flags);

	fc_remove_host(fnic->lport->host);
	scsi_remove_host(fnic->lport->host);
	for (hwq = 0; hwq < fnic->wq_copy_count; hwq++)
		kfree(fnic->sw_copy_wq[hwq].io_req_table);
	fc_exch_mgr_free(fnic->lport);
	vnic_dev_notify_unset(fnic->vdev);
	fnic_free_intr(fnic);
	fnic_free_vnic_resources(fnic);
	fnic_clear_intr_mode(fnic);
	vnic_dev_close(fnic->vdev);
	vnic_dev_unregister(fnic->vdev);
	fnic_iounmap(fnic);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	ida_free(&fnic_ida, fnic->fnic_num);
	scsi_host_put(lp->host);
}

static struct pci_driver fnic_driver = {
	.name = DRV_NAME,
	.id_table = fnic_id_table,
	.probe = fnic_probe,
	.remove = fnic_remove,
};

static int __init fnic_init_module(void)
{
	size_t len;
	int err = 0;

	printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);

	/* Create debugfs entries for fnic */
	err = fnic_debugfs_init();
	if (err < 0) {
		printk(KERN_ERR PFX "Failed to create fnic directory "
				"for tracing and stats logging\n");
		fnic_debugfs_terminate();
	}

	/* Allocate memory for trace buffer */
	err = fnic_trace_buf_init();
	if (err < 0) {
		printk(KERN_ERR PFX
		       "Trace buffer initialization Failed. "
		       "Fnic Tracing utility is disabled\n");
		fnic_trace_free();
	}

    /* Allocate memory for fc trace buffer */
	err = fnic_fc_trace_init();
	if (err < 0) {
		printk(KERN_ERR PFX "FC trace buffer initialization Failed "
		       "FC frame tracing utility is disabled\n");
		fnic_fc_trace_free();
	}

	/* Create a cache for allocation of default size sgls */
	len = sizeof(struct fnic_dflt_sgl_list);
	fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
		("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
		 SLAB_HWCACHE_ALIGN,
		 NULL);
	if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
		printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
		err = -ENOMEM;
		goto err_create_fnic_sgl_slab_dflt;
	}

	/* Create a cache for allocation of max size sgls*/
	len = sizeof(struct fnic_sgl_list);
	fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
		("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
		  SLAB_HWCACHE_ALIGN,
		  NULL);
	if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
		printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
		err = -ENOMEM;
		goto err_create_fnic_sgl_slab_max;
	}

	/* Create a cache of io_req structs for use via mempool */
	fnic_io_req_cache = kmem_cache_create("fnic_io_req",
					      sizeof(struct fnic_io_req),
					      0, SLAB_HWCACHE_ALIGN, NULL);
	if (!fnic_io_req_cache) {
		printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
		err = -ENOMEM;
		goto err_create_fnic_ioreq_slab;
	}

	fnic_event_queue =
		alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, "fnic_event_wq");
	if (!fnic_event_queue) {
		printk(KERN_ERR PFX "fnic work queue create failed\n");
		err = -ENOMEM;
		goto err_create_fnic_workq;
	}

	fnic_fip_queue =
		alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, "fnic_fip_q");
	if (!fnic_fip_queue) {
		printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
		err = -ENOMEM;
		goto err_create_fip_workq;
	}

	fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
	if (!fnic_fc_transport) {
		printk(KERN_ERR PFX "fc_attach_transport error\n");
		err = -ENOMEM;
		goto err_fc_transport;
	}

	/* register the driver with PCI system */
	err = pci_register_driver(&fnic_driver);
	if (err < 0) {
		printk(KERN_ERR PFX "pci register error\n");
		goto err_pci_register;
	}
	return err;

err_pci_register:
	fc_release_transport(fnic_fc_transport);
err_fc_transport:
	destroy_workqueue(fnic_fip_queue);
err_create_fip_workq:
	destroy_workqueue(fnic_event_queue);
err_create_fnic_workq:
	kmem_cache_destroy(fnic_io_req_cache);
err_create_fnic_ioreq_slab:
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
err_create_fnic_sgl_slab_max:
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
err_create_fnic_sgl_slab_dflt:
	fnic_trace_free();
	fnic_fc_trace_free();
	fnic_debugfs_terminate();
	return err;
}

static void __exit fnic_cleanup_module(void)
{
	pci_unregister_driver(&fnic_driver);
	destroy_workqueue(fnic_event_queue);
	if (fnic_fip_queue)
		destroy_workqueue(fnic_fip_queue);
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
	kmem_cache_destroy(fnic_io_req_cache);
	fc_release_transport(fnic_fc_transport);
	fnic_trace_free();
	fnic_fc_trace_free();
	fnic_debugfs_terminate();
	ida_destroy(&fnic_ida);
}

module_init(fnic_init_module);
module_exit(fnic_cleanup_module);