aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/bfa/bfa_ioim.c
blob: 7ae2552e1e147c6996702b1c124c23ed9042a42d (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
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
/*
 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <bfa.h>
#include <cs/bfa_debug.h>
#include <bfa_cb_ioim_macros.h>

BFA_TRC_FILE(HAL, IOIM);

/*
 * forward declarations.
 */
static bfa_boolean_t	bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim);
static bfa_boolean_t	bfa_ioim_sge_setup(struct bfa_ioim_s *ioim);
static void		bfa_ioim_sgpg_setup(struct bfa_ioim_s *ioim);
static bfa_boolean_t	bfa_ioim_send_abort(struct bfa_ioim_s *ioim);
static void		bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim);
static void __bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete);

/**
 *  bfa_ioim_sm
 */

/**
 * IO state machine events
 */
enum bfa_ioim_event {
	BFA_IOIM_SM_START = 1,		/*  io start request from host */
	BFA_IOIM_SM_COMP_GOOD = 2,	/*  io good comp, resource free */
	BFA_IOIM_SM_COMP = 3,		/*  io comp, resource is free */
	BFA_IOIM_SM_COMP_UTAG = 4,	/*  io comp, resource is free */
	BFA_IOIM_SM_DONE = 5,		/*  io comp, resource not free */
	BFA_IOIM_SM_FREE = 6,		/*  io resource is freed */
	BFA_IOIM_SM_ABORT = 7,		/*  abort request from scsi stack */
	BFA_IOIM_SM_ABORT_COMP = 8,	/*  abort from f/w */
	BFA_IOIM_SM_ABORT_DONE = 9,	/*  abort completion from f/w */
	BFA_IOIM_SM_QRESUME = 10,	/*  CQ space available to queue IO */
	BFA_IOIM_SM_SGALLOCED = 11,	/*  SG page allocation successful */
	BFA_IOIM_SM_SQRETRY = 12,	/*  sequence recovery retry */
	BFA_IOIM_SM_HCB	= 13,		/*  bfa callback complete */
	BFA_IOIM_SM_CLEANUP = 14,	/*  IO cleanup from itnim */
	BFA_IOIM_SM_TMSTART = 15,	/*  IO cleanup from tskim */
	BFA_IOIM_SM_TMDONE = 16,	/*  IO cleanup from tskim */
	BFA_IOIM_SM_HWFAIL = 17,	/*  IOC h/w failure event */
	BFA_IOIM_SM_IOTOV = 18,		/*  ITN offline TOV       */
};

/*
 * forward declaration of IO state machine
 */
static void     bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim,
				       enum bfa_ioim_event event);
static void     bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim,
					enum bfa_ioim_event event);
static void     bfa_ioim_sm_active(struct bfa_ioim_s *ioim,
				       enum bfa_ioim_event event);
static void     bfa_ioim_sm_abort(struct bfa_ioim_s *ioim,
				      enum bfa_ioim_event event);
static void     bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim,
					enum bfa_ioim_event event);
static void     bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim,
				      enum bfa_ioim_event event);
static void     bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim,
					    enum bfa_ioim_event event);
static void     bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim,
					      enum bfa_ioim_event event);
static void     bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim,
				    enum bfa_ioim_event event);
static void     bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim,
					 enum bfa_ioim_event event);
static void     bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim,
					enum bfa_ioim_event event);

/**
 * 		IO is not started (unallocated).
 */
static void
bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc_fp(ioim->bfa, ioim->iotag);
	bfa_trc_fp(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_START:
		if (!bfa_itnim_is_online(ioim->itnim)) {
			if (!bfa_itnim_hold_io(ioim->itnim)) {
				bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
				list_del(&ioim->qe);
				list_add_tail(&ioim->qe,
					&ioim->fcpim->ioim_comp_q);
				bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
						__bfa_cb_ioim_pathtov, ioim);
			} else {
				list_del(&ioim->qe);
				list_add_tail(&ioim->qe,
					&ioim->itnim->pending_q);
			}
			break;
		}

		if (ioim->nsges > BFI_SGE_INLINE) {
			if (!bfa_ioim_sge_setup(ioim)) {
				bfa_sm_set_state(ioim, bfa_ioim_sm_sgalloc);
				return;
			}
		}

		if (!bfa_ioim_send_ioreq(ioim)) {
			bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
			break;
		}

		bfa_sm_set_state(ioim, bfa_ioim_sm_active);
		break;

	case BFA_IOIM_SM_IOTOV:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
				__bfa_cb_ioim_pathtov, ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		/**
		 * IO in pending queue can get abort requests. Complete abort
		 * requests immediately.
		 */
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_assert(bfa_q_is_on_q(&ioim->itnim->pending_q, ioim));
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
				ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * 		IO is waiting for SG pages.
 */
static void
bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_SGALLOCED:
		if (!bfa_ioim_send_ioreq(ioim)) {
			bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
			break;
		}
		bfa_sm_set_state(ioim, bfa_ioim_sm_active);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * 		IO is active.
 */
static void
bfa_ioim_sm_active(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc_fp(ioim->bfa, ioim->iotag);
	bfa_trc_fp(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_COMP_GOOD:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
			      __bfa_cb_ioim_good_comp, ioim);
		break;

	case BFA_IOIM_SM_COMP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp,
			      ioim);
		break;

	case BFA_IOIM_SM_DONE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp,
			      ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		ioim->iosp->abort_explicit = BFA_TRUE;
		ioim->io_cbfn = __bfa_cb_ioim_abort;

		if (bfa_ioim_send_abort(ioim))
			bfa_sm_set_state(ioim, bfa_ioim_sm_abort);
		else {
			bfa_sm_set_state(ioim, bfa_ioim_sm_abort_qfull);
			bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq,
					  &ioim->iosp->reqq_wait);
		}
		break;

	case BFA_IOIM_SM_CLEANUP:
		ioim->iosp->abort_explicit = BFA_FALSE;
		ioim->io_cbfn = __bfa_cb_ioim_failed;

		if (bfa_ioim_send_abort(ioim))
			bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
		else {
			bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
			bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq,
					  &ioim->iosp->reqq_wait);
		}
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * 		IO is being aborted, waiting for completion from firmware.
 */
static void
bfa_ioim_sm_abort(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_COMP_GOOD:
	case BFA_IOIM_SM_COMP:
	case BFA_IOIM_SM_DONE:
	case BFA_IOIM_SM_FREE:
		break;

	case BFA_IOIM_SM_ABORT_DONE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_ABORT_COMP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_COMP_UTAG:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_assert(ioim->iosp->abort_explicit == BFA_TRUE);
		ioim->iosp->abort_explicit = BFA_FALSE;

		if (bfa_ioim_send_abort(ioim))
			bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
		else {
			bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
			bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq,
					  &ioim->iosp->reqq_wait);
		}
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * IO is being cleaned up (implicit abort), waiting for completion from
 * firmware.
 */
static void
bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_COMP_GOOD:
	case BFA_IOIM_SM_COMP:
	case BFA_IOIM_SM_DONE:
	case BFA_IOIM_SM_FREE:
		break;

	case BFA_IOIM_SM_ABORT:
		/**
		 * IO is already being aborted implicitly
		 */
		ioim->io_cbfn = __bfa_cb_ioim_abort;
		break;

	case BFA_IOIM_SM_ABORT_DONE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_ABORT_COMP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_COMP_UTAG:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	case BFA_IOIM_SM_CLEANUP:
		/**
		 * IO can be in cleanup state already due to TM command. 2nd cleanup
		 * request comes from ITN offline event.
		 */
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * 		IO is waiting for room in request CQ
 */
static void
bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_QRESUME:
		bfa_sm_set_state(ioim, bfa_ioim_sm_active);
		bfa_ioim_send_ioreq(ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * 		Active IO is being aborted, waiting for room in request CQ.
 */
static void
bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_QRESUME:
		bfa_sm_set_state(ioim, bfa_ioim_sm_abort);
		bfa_ioim_send_abort(ioim);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_assert(ioim->iosp->abort_explicit == BFA_TRUE);
		ioim->iosp->abort_explicit = BFA_FALSE;
		bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
		break;

	case BFA_IOIM_SM_COMP_GOOD:
	case BFA_IOIM_SM_COMP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_DONE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * 		Active IO is being cleaned up, waiting for room in request CQ.
 */
static void
bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_QRESUME:
		bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
		bfa_ioim_send_abort(ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		/**
		 * IO is alraedy being cleaned up implicitly
		 */
		ioim->io_cbfn = __bfa_cb_ioim_abort;
		break;

	case BFA_IOIM_SM_COMP_GOOD:
	case BFA_IOIM_SM_COMP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_DONE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * IO bfa callback is pending.
 */
static void
bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc_fp(ioim->bfa, ioim->iotag);
	bfa_trc_fp(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_HCB:
		bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
		bfa_ioim_free(ioim);
		bfa_cb_ioim_resfree(ioim->bfa->bfad);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * IO bfa callback is pending. IO resource cannot be freed.
 */
static void
bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_HCB:
		bfa_sm_set_state(ioim, bfa_ioim_sm_resfree);
		list_del(&ioim->qe);
		list_add_tail(&ioim->qe, &ioim->fcpim->ioim_resfree_q);
		break;

	case BFA_IOIM_SM_FREE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		break;

	default:
		bfa_assert(0);
	}
}

/**
 * IO is completed, waiting resource free from firmware.
 */
static void
bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_FREE:
		bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
		bfa_ioim_free(ioim);
		bfa_cb_ioim_resfree(ioim->bfa->bfad);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		break;

	default:
		bfa_assert(0);
	}
}



/**
 *  bfa_ioim_private
 */

static void
__bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete)
{
	struct bfa_ioim_s *ioim = cbarg;

	if (!complete) {
		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
		return;
	}

	bfa_cb_ioim_good_comp(ioim->bfa->bfad, ioim->dio);
}

static void
__bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete)
{
	struct bfa_ioim_s	*ioim = cbarg;
	struct bfi_ioim_rsp_s *m;
	u8		*snsinfo = NULL;
	u8         sns_len = 0;
	s32         residue = 0;

	if (!complete) {
		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
		return;
	}

	m = (struct bfi_ioim_rsp_s *) &ioim->iosp->comp_rspmsg;
	if (m->io_status == BFI_IOIM_STS_OK) {
		/**
		 * setup sense information, if present
		 */
		if (m->scsi_status == SCSI_STATUS_CHECK_CONDITION
					&& m->sns_len) {
			sns_len = m->sns_len;
			snsinfo = ioim->iosp->snsinfo;
		}

		/**
		 * setup residue value correctly for normal completions
		 */
		if (m->resid_flags == FCP_RESID_UNDER)
			residue = bfa_os_ntohl(m->residue);
		if (m->resid_flags == FCP_RESID_OVER) {
			residue = bfa_os_ntohl(m->residue);
			residue = -residue;
		}
	}

	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, m->io_status,
			  m->scsi_status, sns_len, snsinfo, residue);
}

static void
__bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete)
{
	struct bfa_ioim_s *ioim = cbarg;

	if (!complete) {
		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
		return;
	}

	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_ABORTED,
			  0, 0, NULL, 0);
}

static void
__bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete)
{
	struct bfa_ioim_s *ioim = cbarg;

	if (!complete) {
		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
		return;
	}

	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_PATHTOV,
			  0, 0, NULL, 0);
}

static void
__bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete)
{
	struct bfa_ioim_s *ioim = cbarg;

	if (!complete) {
		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
		return;
	}

	bfa_cb_ioim_abort(ioim->bfa->bfad, ioim->dio);
}

static void
bfa_ioim_sgpg_alloced(void *cbarg)
{
	struct bfa_ioim_s *ioim = cbarg;

	ioim->nsgpgs = BFA_SGPG_NPAGE(ioim->nsges);
	list_splice_tail_init(&ioim->iosp->sgpg_wqe.sgpg_q, &ioim->sgpg_q);
	bfa_ioim_sgpg_setup(ioim);
	bfa_sm_send_event(ioim, BFA_IOIM_SM_SGALLOCED);
}

/**
 * Send I/O request to firmware.
 */
static          bfa_boolean_t
bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim)
{
	struct bfa_itnim_s *itnim = ioim->itnim;
	struct bfi_ioim_req_s *m;
	static struct fcp_cmnd_s cmnd_z0 = { 0 };
	struct bfi_sge_s      *sge;
	u32        pgdlen = 0;

	/**
	 * check for room in queue to send request now
	 */
	m = bfa_reqq_next(ioim->bfa, itnim->reqq);
	if (!m) {
		bfa_reqq_wait(ioim->bfa, ioim->itnim->reqq,
				  &ioim->iosp->reqq_wait);
		return BFA_FALSE;
	}

	/**
	 * build i/o request message next
	 */
	m->io_tag = bfa_os_htons(ioim->iotag);
	m->rport_hdl = ioim->itnim->rport->fw_handle;
	m->io_timeout = bfa_cb_ioim_get_timeout(ioim->dio);

	/**
	 * build inline IO SG element here
	 */
	sge = &m->sges[0];
	if (ioim->nsges) {
		sge->sga = bfa_cb_ioim_get_sgaddr(ioim->dio, 0);
		pgdlen = bfa_cb_ioim_get_sglen(ioim->dio, 0);
		sge->sg_len = pgdlen;
		sge->flags = (ioim->nsges > BFI_SGE_INLINE) ?
					BFI_SGE_DATA_CPL : BFI_SGE_DATA_LAST;
		bfa_sge_to_be(sge);
		sge++;
	}

	if (ioim->nsges > BFI_SGE_INLINE) {
		sge->sga = ioim->sgpg->sgpg_pa;
	} else {
		sge->sga.a32.addr_lo = 0;
		sge->sga.a32.addr_hi = 0;
	}
	sge->sg_len = pgdlen;
	sge->flags = BFI_SGE_PGDLEN;
	bfa_sge_to_be(sge);

	/**
	 * set up I/O command parameters
	 */
	bfa_os_assign(m->cmnd, cmnd_z0);
	m->cmnd.lun = bfa_cb_ioim_get_lun(ioim->dio);
	m->cmnd.iodir = bfa_cb_ioim_get_iodir(ioim->dio);
	bfa_os_assign(m->cmnd.cdb,
			*(struct scsi_cdb_s *)bfa_cb_ioim_get_cdb(ioim->dio));
	m->cmnd.fcp_dl = bfa_os_htonl(bfa_cb_ioim_get_size(ioim->dio));

	/**
	 * set up I/O message header
	 */
	switch (m->cmnd.iodir) {
	case FCP_IODIR_READ:
		bfi_h2i_set(m->mh, BFI_MC_IOIM_READ, 0, bfa_lpuid(ioim->bfa));
		bfa_stats(itnim, input_reqs);
		break;
	case FCP_IODIR_WRITE:
		bfi_h2i_set(m->mh, BFI_MC_IOIM_WRITE, 0, bfa_lpuid(ioim->bfa));
		bfa_stats(itnim, output_reqs);
		break;
	case FCP_IODIR_RW:
		bfa_stats(itnim, input_reqs);
		bfa_stats(itnim, output_reqs);
	default:
		bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_lpuid(ioim->bfa));
	}
	if (itnim->seq_rec ||
	    (bfa_cb_ioim_get_size(ioim->dio) & (sizeof(u32) - 1)))
		bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_lpuid(ioim->bfa));

#ifdef IOIM_ADVANCED
	m->cmnd.crn = bfa_cb_ioim_get_crn(ioim->dio);
	m->cmnd.priority = bfa_cb_ioim_get_priority(ioim->dio);
	m->cmnd.taskattr = bfa_cb_ioim_get_taskattr(ioim->dio);

	/**
	 * Handle large CDB (>16 bytes).
	 */
	m->cmnd.addl_cdb_len = (bfa_cb_ioim_get_cdblen(ioim->dio) -
					FCP_CMND_CDB_LEN) / sizeof(u32);
	if (m->cmnd.addl_cdb_len) {
		bfa_os_memcpy(&m->cmnd.cdb + 1, (struct scsi_cdb_s *)
				bfa_cb_ioim_get_cdb(ioim->dio) + 1,
				m->cmnd.addl_cdb_len * sizeof(u32));
		fcp_cmnd_fcpdl(&m->cmnd) =
				bfa_os_htonl(bfa_cb_ioim_get_size(ioim->dio));
	}
#endif

	/**
	 * queue I/O message to firmware
	 */
	bfa_reqq_produce(ioim->bfa, itnim->reqq);
	return BFA_TRUE;
}

/**
 * Setup any additional SG pages needed.Inline SG element is setup
 * at queuing time.
 */
static bfa_boolean_t
bfa_ioim_sge_setup(struct bfa_ioim_s *ioim)
{
	u16        nsgpgs;

	bfa_assert(ioim->nsges > BFI_SGE_INLINE);

	/**
	 * allocate SG pages needed
	 */
	nsgpgs = BFA_SGPG_NPAGE(ioim->nsges);
	if (!nsgpgs)
		return BFA_TRUE;

	if (bfa_sgpg_malloc(ioim->bfa, &ioim->sgpg_q, nsgpgs)
	    != BFA_STATUS_OK) {
		bfa_sgpg_wait(ioim->bfa, &ioim->iosp->sgpg_wqe, nsgpgs);
		return BFA_FALSE;
	}

	ioim->nsgpgs = nsgpgs;
	bfa_ioim_sgpg_setup(ioim);

	return BFA_TRUE;
}

static void
bfa_ioim_sgpg_setup(struct bfa_ioim_s *ioim)
{
	int             sgeid, nsges, i;
	struct bfi_sge_s      *sge;
	struct bfa_sgpg_s *sgpg;
	u32        pgcumsz;

	sgeid = BFI_SGE_INLINE;
	ioim->sgpg = sgpg = bfa_q_first(&ioim->sgpg_q);

	do {
		sge = sgpg->sgpg->sges;
		nsges = ioim->nsges - sgeid;
		if (nsges > BFI_SGPG_DATA_SGES)
			nsges = BFI_SGPG_DATA_SGES;

		pgcumsz = 0;
		for (i = 0; i < nsges; i++, sge++, sgeid++) {
			sge->sga = bfa_cb_ioim_get_sgaddr(ioim->dio, sgeid);
			sge->sg_len = bfa_cb_ioim_get_sglen(ioim->dio, sgeid);
			pgcumsz += sge->sg_len;

			/**
			 * set flags
			 */
			if (i < (nsges - 1))
				sge->flags = BFI_SGE_DATA;
			else if (sgeid < (ioim->nsges - 1))
				sge->flags = BFI_SGE_DATA_CPL;
			else
				sge->flags = BFI_SGE_DATA_LAST;
		}

		sgpg = (struct bfa_sgpg_s *) bfa_q_next(sgpg);

		/**
		 * set the link element of each page
		 */
		if (sgeid == ioim->nsges) {
			sge->flags = BFI_SGE_PGDLEN;
			sge->sga.a32.addr_lo = 0;
			sge->sga.a32.addr_hi = 0;
		} else {
			sge->flags = BFI_SGE_LINK;
			sge->sga = sgpg->sgpg_pa;
		}
		sge->sg_len = pgcumsz;
	} while (sgeid < ioim->nsges);
}

/**
 * Send I/O abort request to firmware.
 */
static          bfa_boolean_t
bfa_ioim_send_abort(struct bfa_ioim_s *ioim)
{
	struct bfa_itnim_s          *itnim = ioim->itnim;
	struct bfi_ioim_abort_req_s *m;
	enum bfi_ioim_h2i       msgop;

	/**
	 * check for room in queue to send request now
	 */
	m = bfa_reqq_next(ioim->bfa, itnim->reqq);
	if (!m)
		return BFA_FALSE;

	/**
	 * build i/o request message next
	 */
	if (ioim->iosp->abort_explicit)
		msgop = BFI_IOIM_H2I_IOABORT_REQ;
	else
		msgop = BFI_IOIM_H2I_IOCLEANUP_REQ;

	bfi_h2i_set(m->mh, BFI_MC_IOIM, msgop, bfa_lpuid(ioim->bfa));
	m->io_tag    = bfa_os_htons(ioim->iotag);
	m->abort_tag = ++ioim->abort_tag;

	/**
	 * queue I/O message to firmware
	 */
	bfa_reqq_produce(ioim->bfa, itnim->reqq);
	return BFA_TRUE;
}

/**
 * Call to resume any I/O requests waiting for room in request queue.
 */
static void
bfa_ioim_qresume(void *cbarg)
{
	struct bfa_ioim_s *ioim = cbarg;

	bfa_fcpim_stats(ioim->fcpim, qresumes);
	bfa_sm_send_event(ioim, BFA_IOIM_SM_QRESUME);
}


static void
bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim)
{
	/**
	 * Move IO from itnim queue to fcpim global queue since itnim will be
	 * freed.
	 */
	list_del(&ioim->qe);
	list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);

	if (!ioim->iosp->tskim) {
		if (ioim->fcpim->delay_comp && ioim->itnim->iotov_active) {
			bfa_cb_dequeue(&ioim->hcb_qe);
			list_del(&ioim->qe);
			list_add_tail(&ioim->qe, &ioim->itnim->delay_comp_q);
		}
		bfa_itnim_iodone(ioim->itnim);
	} else
		bfa_tskim_iodone(ioim->iosp->tskim);
}

/**
 * 		  or after the link comes back.
 */
void
bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, bfa_boolean_t iotov)
{
	/**
	 * If path tov timer expired, failback with PATHTOV status - these
	 * IO requests are not normally retried by IO stack.
	 *
	 * Otherwise device cameback online and fail it with normal failed
	 * status so that IO stack retries these failed IO requests.
	 */
	if (iotov)
		ioim->io_cbfn = __bfa_cb_ioim_pathtov;
	else
		ioim->io_cbfn = __bfa_cb_ioim_failed;

	bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);

    /**
     * Move IO to fcpim global queue since itnim will be
     * freed.
     */
    list_del(&ioim->qe);
    list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
}



/**
 *  bfa_ioim_friend
 */

/**
 * Memory allocation and initialization.
 */
void
bfa_ioim_attach(struct bfa_fcpim_mod_s *fcpim, struct bfa_meminfo_s *minfo)
{
	struct bfa_ioim_s		*ioim;
	struct bfa_ioim_sp_s	*iosp;
	u16		i;
	u8			*snsinfo;
	u32		snsbufsz;

	/**
	 * claim memory first
	 */
	ioim = (struct bfa_ioim_s *) bfa_meminfo_kva(minfo);
	fcpim->ioim_arr = ioim;
	bfa_meminfo_kva(minfo) = (u8 *) (ioim + fcpim->num_ioim_reqs);

	iosp = (struct bfa_ioim_sp_s *) bfa_meminfo_kva(minfo);
	fcpim->ioim_sp_arr = iosp;
	bfa_meminfo_kva(minfo) = (u8 *) (iosp + fcpim->num_ioim_reqs);

	/**
	 * Claim DMA memory for per IO sense data.
	 */
	snsbufsz = fcpim->num_ioim_reqs * BFI_IOIM_SNSLEN;
	fcpim->snsbase.pa  = bfa_meminfo_dma_phys(minfo);
	bfa_meminfo_dma_phys(minfo) += snsbufsz;

	fcpim->snsbase.kva = bfa_meminfo_dma_virt(minfo);
	bfa_meminfo_dma_virt(minfo) += snsbufsz;
	snsinfo = fcpim->snsbase.kva;
	bfa_iocfc_set_snsbase(fcpim->bfa, fcpim->snsbase.pa);

	/**
	 * Initialize ioim free queues
	 */
	INIT_LIST_HEAD(&fcpim->ioim_free_q);
	INIT_LIST_HEAD(&fcpim->ioim_resfree_q);
	INIT_LIST_HEAD(&fcpim->ioim_comp_q);

	for (i = 0; i < fcpim->num_ioim_reqs;
	     i++, ioim++, iosp++, snsinfo += BFI_IOIM_SNSLEN) {
		/*
		 * initialize IOIM
		 */
		bfa_os_memset(ioim, 0, sizeof(struct bfa_ioim_s));
		ioim->iotag   = i;
		ioim->bfa     = fcpim->bfa;
		ioim->fcpim   = fcpim;
		ioim->iosp    = iosp;
		iosp->snsinfo = snsinfo;
		INIT_LIST_HEAD(&ioim->sgpg_q);
		bfa_reqq_winit(&ioim->iosp->reqq_wait,
				   bfa_ioim_qresume, ioim);
		bfa_sgpg_winit(&ioim->iosp->sgpg_wqe,
				   bfa_ioim_sgpg_alloced, ioim);
		bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);

		list_add_tail(&ioim->qe, &fcpim->ioim_free_q);
	}
}

/**
 * Driver detach time call.
 */
void
bfa_ioim_detach(struct bfa_fcpim_mod_s *fcpim)
{
}

void
bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
	struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
	struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m;
	struct bfa_ioim_s *ioim;
	u16        iotag;
	enum bfa_ioim_event evt = BFA_IOIM_SM_COMP;

	iotag = bfa_os_ntohs(rsp->io_tag);

	ioim = BFA_IOIM_FROM_TAG(fcpim, iotag);
	bfa_assert(ioim->iotag == iotag);

	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, rsp->io_status);
	bfa_trc(ioim->bfa, rsp->reuse_io_tag);

	if (bfa_sm_cmp_state(ioim, bfa_ioim_sm_active))
		bfa_os_assign(ioim->iosp->comp_rspmsg, *m);

	switch (rsp->io_status) {
	case BFI_IOIM_STS_OK:
		bfa_fcpim_stats(fcpim, iocomp_ok);
		if (rsp->reuse_io_tag == 0)
			evt = BFA_IOIM_SM_DONE;
		else
			evt = BFA_IOIM_SM_COMP;
		break;

	case BFI_IOIM_STS_TIMEDOUT:
	case BFI_IOIM_STS_ABORTED:
		rsp->io_status = BFI_IOIM_STS_ABORTED;
		bfa_fcpim_stats(fcpim, iocomp_aborted);
		if (rsp->reuse_io_tag == 0)
			evt = BFA_IOIM_SM_DONE;
		else
			evt = BFA_IOIM_SM_COMP;
		break;

	case BFI_IOIM_STS_PROTO_ERR:
		bfa_fcpim_stats(fcpim, iocom_proto_err);
		bfa_assert(rsp->reuse_io_tag);
		evt = BFA_IOIM_SM_COMP;
		break;

	case BFI_IOIM_STS_SQER_NEEDED:
		bfa_fcpim_stats(fcpim, iocom_sqer_needed);
		bfa_assert(rsp->reuse_io_tag == 0);
		evt = BFA_IOIM_SM_SQRETRY;
		break;

	case BFI_IOIM_STS_RES_FREE:
		bfa_fcpim_stats(fcpim, iocom_res_free);
		evt = BFA_IOIM_SM_FREE;
		break;

	case BFI_IOIM_STS_HOST_ABORTED:
		bfa_fcpim_stats(fcpim, iocom_hostabrts);
		if (rsp->abort_tag != ioim->abort_tag) {
			bfa_trc(ioim->bfa, rsp->abort_tag);
			bfa_trc(ioim->bfa, ioim->abort_tag);
			return;
		}

		if (rsp->reuse_io_tag)
			evt = BFA_IOIM_SM_ABORT_COMP;
		else
			evt = BFA_IOIM_SM_ABORT_DONE;
		break;

	case BFI_IOIM_STS_UTAG:
		bfa_fcpim_stats(fcpim, iocom_utags);
		evt = BFA_IOIM_SM_COMP_UTAG;
		break;

	default:
		bfa_assert(0);
	}

	bfa_sm_send_event(ioim, evt);
}

void
bfa_ioim_good_comp_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
	struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
	struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m;
	struct bfa_ioim_s *ioim;
	u16        iotag;

	iotag = bfa_os_ntohs(rsp->io_tag);

	ioim = BFA_IOIM_FROM_TAG(fcpim, iotag);
	bfa_assert(ioim->iotag == iotag);

	bfa_trc_fp(ioim->bfa, ioim->iotag);
	bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP_GOOD);
}

/**
 * Called by itnim to clean up IO while going offline.
 */
void
bfa_ioim_cleanup(struct bfa_ioim_s *ioim)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_fcpim_stats(ioim->fcpim, io_cleanups);

	ioim->iosp->tskim = NULL;
	bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP);
}

void
bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim, struct bfa_tskim_s *tskim)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_fcpim_stats(ioim->fcpim, io_tmaborts);

	ioim->iosp->tskim = tskim;
	bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP);
}

/**
 * IOC failure handling.
 */
void
bfa_ioim_iocdisable(struct bfa_ioim_s *ioim)
{
	bfa_sm_send_event(ioim, BFA_IOIM_SM_HWFAIL);
}

/**
 * IO offline TOV popped. Fail the pending IO.
 */
void
bfa_ioim_tov(struct bfa_ioim_s *ioim)
{
	bfa_sm_send_event(ioim, BFA_IOIM_SM_IOTOV);
}



/**
 *  bfa_ioim_api
 */

/**
 * Allocate IOIM resource for initiator mode I/O request.
 */
struct bfa_ioim_s *
bfa_ioim_alloc(struct bfa_s *bfa, struct bfad_ioim_s *dio,
		struct bfa_itnim_s *itnim, u16 nsges)
{
	struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
	struct bfa_ioim_s *ioim;

	/**
	 * alocate IOIM resource
	 */
	bfa_q_deq(&fcpim->ioim_free_q, &ioim);
	if (!ioim) {
		bfa_fcpim_stats(fcpim, no_iotags);
		return NULL;
	}

	ioim->dio = dio;
	ioim->itnim = itnim;
	ioim->nsges = nsges;
	ioim->nsgpgs = 0;

	bfa_stats(fcpim, total_ios);
	bfa_stats(itnim, ios);
	fcpim->ios_active++;

	list_add_tail(&ioim->qe, &itnim->io_q);
	bfa_trc_fp(ioim->bfa, ioim->iotag);

	return ioim;
}

void
bfa_ioim_free(struct bfa_ioim_s *ioim)
{
	struct bfa_fcpim_mod_s *fcpim = ioim->fcpim;

	bfa_trc_fp(ioim->bfa, ioim->iotag);
	bfa_assert_fp(bfa_sm_cmp_state(ioim, bfa_ioim_sm_uninit));

	bfa_assert_fp(list_empty(&ioim->sgpg_q)
		   || (ioim->nsges > BFI_SGE_INLINE));

	if (ioim->nsgpgs > 0)
		bfa_sgpg_mfree(ioim->bfa, &ioim->sgpg_q, ioim->nsgpgs);

	bfa_stats(ioim->itnim, io_comps);
	fcpim->ios_active--;

	list_del(&ioim->qe);
	list_add_tail(&ioim->qe, &fcpim->ioim_free_q);
}

void
bfa_ioim_start(struct bfa_ioim_s *ioim)
{
	bfa_trc_fp(ioim->bfa, ioim->iotag);
	bfa_sm_send_event(ioim, BFA_IOIM_SM_START);
}

/**
 * Driver I/O abort request.
 */
void
bfa_ioim_abort(struct bfa_ioim_s *ioim)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_fcpim_stats(ioim->fcpim, io_aborts);
	bfa_sm_send_event(ioim, BFA_IOIM_SM_ABORT);
}