summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/qla2xxx/qla_rscn.c
blob: 7534efcc891860e7598cdffb28389b48bf16e312 (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
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
/*
 *                  QLOGIC LINUX SOFTWARE
 *
 * QLogic ISP2x00 device driver for Linux 2.6.x
 * Copyright (C) 2003-2005 QLogic Corporation
 * (www.qlogic.com)
 *
 * 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; either version 2, or (at your option) any
 * later version.
 *
 * 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 "qla_def.h"

/**
 * IO descriptor handle definitions.
 *
 * Signature form:
 *
 *	|31------28|27-------------------12|11-------0|
 *	|   Type   |   Rolling Signature   |   Index  |
 *	|----------|-----------------------|----------|
 *
 **/

#define HDL_TYPE_SCSI		0
#define HDL_TYPE_ASYNC_IOCB	0x0A

#define HDL_INDEX_BITS	12
#define HDL_ITER_BITS	16
#define HDL_TYPE_BITS	4

#define HDL_INDEX_MASK	((1UL << HDL_INDEX_BITS) - 1)
#define HDL_ITER_MASK	((1UL << HDL_ITER_BITS) - 1)
#define HDL_TYPE_MASK	((1UL << HDL_TYPE_BITS) - 1)

#define HDL_INDEX_SHIFT	0
#define HDL_ITER_SHIFT	(HDL_INDEX_SHIFT + HDL_INDEX_BITS)
#define HDL_TYPE_SHIFT	(HDL_ITER_SHIFT + HDL_ITER_BITS)

/* Local Prototypes. */
static inline uint32_t qla2x00_to_handle(uint16_t, uint16_t, uint16_t);
static inline uint16_t qla2x00_handle_to_idx(uint32_t);
static inline uint32_t qla2x00_iodesc_to_handle(struct io_descriptor *);
static inline struct io_descriptor *qla2x00_handle_to_iodesc(scsi_qla_host_t *,
    uint32_t);

static inline struct io_descriptor *qla2x00_alloc_iodesc(scsi_qla_host_t *);
static inline void qla2x00_free_iodesc(struct io_descriptor *);
static inline void qla2x00_init_io_descriptors(scsi_qla_host_t *);

static void qla2x00_iodesc_timeout(unsigned long);
static inline void qla2x00_add_iodesc_timer(struct io_descriptor *);
static inline void qla2x00_remove_iodesc_timer(struct io_descriptor *);

static inline void qla2x00_update_login_fcport(scsi_qla_host_t *,
    struct mbx_entry *, fc_port_t *);

static int qla2x00_send_abort_iocb(scsi_qla_host_t *, struct io_descriptor *,
    uint32_t, int);
static int qla2x00_send_abort_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
    struct mbx_entry *);

static int qla2x00_send_adisc_iocb(scsi_qla_host_t *, struct io_descriptor *,
    int);
static int qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
    struct mbx_entry *);

static int qla2x00_send_logout_iocb(scsi_qla_host_t *, struct io_descriptor *,
    int);
static int qla2x00_send_logout_iocb_cb(scsi_qla_host_t *,
    struct io_descriptor *, struct mbx_entry *);

static int qla2x00_send_login_iocb(scsi_qla_host_t *, struct io_descriptor *,
    port_id_t *, int);
static int qla2x00_send_login_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
    struct mbx_entry *);

/**
 * Mailbox IOCB callback array.
 **/
static int (*iocb_function_cb_list[LAST_IOCB_CB])
	(scsi_qla_host_t *, struct io_descriptor *, struct mbx_entry *) = {

	qla2x00_send_abort_iocb_cb,
	qla2x00_send_adisc_iocb_cb,
	qla2x00_send_logout_iocb_cb,
	qla2x00_send_login_iocb_cb,
};


/**
 * Generic IO descriptor handle routines.
 **/

/**
 * qla2x00_to_handle() - Create a descriptor handle.
 * @type: descriptor type
 * @iter: descriptor rolling signature
 * @idx: index to the descriptor array
 *
 * Returns a composite handle based in the @type, @iter, and @idx.
 */
static inline uint32_t
qla2x00_to_handle(uint16_t type, uint16_t iter, uint16_t idx)
{
	return ((uint32_t)(((uint32_t)type << HDL_TYPE_SHIFT) |
	    ((uint32_t)iter << HDL_ITER_SHIFT) |
	    ((uint32_t)idx << HDL_INDEX_SHIFT)));
}

/**
 * qla2x00_handle_to_idx() - Retrive the index for a given handle.
 * @handle: descriptor handle
 *
 * Returns the index specified by the @handle.
 */
static inline uint16_t
qla2x00_handle_to_idx(uint32_t handle)
{
	return ((uint16_t)(((handle) >> HDL_INDEX_SHIFT) & HDL_INDEX_MASK));
}

/**
 * qla2x00_iodesc_to_handle() - Convert an IO descriptor to a unique handle.
 * @iodesc: io descriptor
 *
 * Returns a unique handle for @iodesc.
 */
static inline uint32_t
qla2x00_iodesc_to_handle(struct io_descriptor *iodesc)
{
	uint32_t handle;

	handle = qla2x00_to_handle(HDL_TYPE_ASYNC_IOCB,
	    ++iodesc->ha->iodesc_signature, iodesc->idx);
	iodesc->signature = handle;

	return (handle);
}

/**
 * qla2x00_handle_to_iodesc() - Retrieve an IO descriptor given a unique handle.
 * @ha: HA context
 * @handle: handle to io descriptor
 *
 * Returns a pointer to the io descriptor, or NULL, if the io descriptor does
 * not exist or the io descriptors signature does not @handle.
 */
static inline struct io_descriptor *
qla2x00_handle_to_iodesc(scsi_qla_host_t *ha, uint32_t handle)
{
	uint16_t idx;
	struct io_descriptor *iodesc;

	idx = qla2x00_handle_to_idx(handle);
	iodesc = &ha->io_descriptors[idx];
	if (iodesc)
		if (iodesc->signature != handle)
			iodesc = NULL;

	return (iodesc);
}


/**
 * IO descriptor allocation routines.
 **/

/**
 * qla2x00_alloc_iodesc() - Allocate an IO descriptor from the pool.
 * @ha: HA context
 *
 * Returns a pointer to the allocated io descriptor, or NULL, if none available.
 */
static inline struct io_descriptor *
qla2x00_alloc_iodesc(scsi_qla_host_t *ha)
{
	uint16_t iter;
	struct io_descriptor *iodesc;

	iodesc = NULL;
	for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
		if (ha->io_descriptors[iter].used)
			continue;

		iodesc = &ha->io_descriptors[iter];
		iodesc->used = 1;
		iodesc->idx = iter;
		init_timer(&iodesc->timer);
		iodesc->ha = ha;
		iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
		break;
	}

	return (iodesc);
}

/**
 * qla2x00_free_iodesc() - Free an IO descriptor.
 * @iodesc: io descriptor
 *
 * NOTE: The io descriptors timer *must* be stopped before it can be free'd.
 */
static inline void
qla2x00_free_iodesc(struct io_descriptor *iodesc)
{
	iodesc->used = 0;
	iodesc->signature = 0;
}

/**
 * qla2x00_remove_iodesc_timer() - Remove an active timer from an IO descriptor.
 * @iodesc: io descriptor
 */
static inline void
qla2x00_remove_iodesc_timer(struct io_descriptor *iodesc)
{
	if (iodesc->timer.function != NULL) {
		del_timer_sync(&iodesc->timer);
		iodesc->timer.data = (unsigned long) NULL;
		iodesc->timer.function = NULL;
	}
}

/**
 * qla2x00_init_io_descriptors() - Initialize the pool of IO descriptors.
 * @ha: HA context
 */
static inline void
qla2x00_init_io_descriptors(scsi_qla_host_t *ha)
{
	uint16_t iter;

	for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
		if (!ha->io_descriptors[iter].used)
			continue;

		qla2x00_remove_iodesc_timer(&ha->io_descriptors[iter]);
		qla2x00_free_iodesc(&ha->io_descriptors[iter]);
	}
}


/**
 * IO descriptor timer routines.
 **/

/**
 * qla2x00_iodesc_timeout() - Timeout IO descriptor handler.
 * @data: io descriptor
 */
static void
qla2x00_iodesc_timeout(unsigned long data)
{
	struct io_descriptor *iodesc;

	iodesc = (struct io_descriptor *) data;

	DEBUG14(printk("scsi(%ld): IO descriptor timeout, index=%x "
	    "signature=%08x, scheduling ISP abort.\n", iodesc->ha->host_no,
	    iodesc->idx, iodesc->signature));

	qla2x00_free_iodesc(iodesc);

	qla_printk(KERN_WARNING, iodesc->ha,
	    "IO descriptor timeout. Scheduling ISP abort.\n");
	set_bit(ISP_ABORT_NEEDED, &iodesc->ha->dpc_flags);
}

/**
 * qla2x00_add_iodesc_timer() - Add and start a timer for an IO descriptor.
 * @iodesc: io descriptor
 *
 * NOTE:
 * The firmware shall timeout an outstanding mailbox IOCB in 2 * R_A_TOV (in
 * tenths of a second) after it hits the wire.  But, if there are any request
 * resource contraints (i.e. during heavy I/O), exchanges can be held off for
 * at most R_A_TOV.  Therefore, the driver will wait 4 * R_A_TOV before
 * scheduling a recovery (big hammer).
 */
static inline void
qla2x00_add_iodesc_timer(struct io_descriptor *iodesc)
{
	unsigned long timeout;

	timeout = (iodesc->ha->r_a_tov * 4) / 10;
	init_timer(&iodesc->timer);
	iodesc->timer.data = (unsigned long) iodesc;
	iodesc->timer.expires = jiffies + (timeout * HZ);
	iodesc->timer.function =
	    (void (*) (unsigned long)) qla2x00_iodesc_timeout;
	add_timer(&iodesc->timer);
}

/**
 * IO descriptor support routines.
 **/

/**
 * qla2x00_update_login_fcport() - Update fcport data after login processing.
 * @ha: HA context
 * @mbxstat: Mailbox command status IOCB
 * @fcport: port to update
 */
static inline void
qla2x00_update_login_fcport(scsi_qla_host_t *ha, struct mbx_entry *mbxstat,
    fc_port_t *fcport)
{
	if (le16_to_cpu(mbxstat->mb1) & BIT_0) {
		fcport->port_type = FCT_INITIATOR;
	} else {
		fcport->port_type = FCT_TARGET;
		if (le16_to_cpu(mbxstat->mb1) & BIT_1) {
			fcport->flags |= FCF_TAPE_PRESENT;
		}
	}
	fcport->login_retry = 0;
	fcport->port_login_retry_count = ha->port_down_retry_count *
	    PORT_RETRY_TIME;
	atomic_set(&fcport->port_down_timer, ha->port_down_retry_count *
	    PORT_RETRY_TIME);
	fcport->flags |= FCF_FABRIC_DEVICE;
	fcport->flags &= ~FCF_FAILOVER_NEEDED;
	fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
	atomic_set(&fcport->state, FCS_ONLINE);
	if (fcport->rport)
		fc_remote_port_unblock(fcport->rport);
}


/**
 * Mailbox IOCB commands.
 **/

/**
 * qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
 * @ha: HA context
 * @handle: handle to io descriptor
 *
 * Returns a pointer to the reqest entry, or NULL, if none were available.
 */
static inline struct mbx_entry *
qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
{
	uint16_t cnt;
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
	struct mbx_entry *mbxentry;

	mbxentry = NULL;

	if (ha->req_q_cnt < 3) {
		cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
		if  (ha->req_ring_index < cnt)
			ha->req_q_cnt = cnt - ha->req_ring_index;
		else
			ha->req_q_cnt = ha->request_q_length -
			    (ha->req_ring_index - cnt);
	}
	if (ha->req_q_cnt >= 3) {
		mbxentry = (struct mbx_entry *)ha->request_ring_ptr;

		memset(mbxentry, 0, sizeof(struct mbx_entry));
		mbxentry->entry_type = MBX_IOCB_TYPE;
		mbxentry->entry_count = 1;
		mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
		mbxentry->handle = handle;
	}
	return (mbxentry);
}

/**
 * qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
 * @ha: HA context
 * @iodesc: io descriptor
 * @handle_to_abort: firmware handle to abort
 * @ha_locked: is function called with the hardware lock
 *
 * Returns QLA_SUCCESS if the IOCB was issued.
 */
static int
qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    uint32_t handle_to_abort, int ha_locked)
{
	unsigned long flags = 0;
	struct mbx_entry *mbxentry;

	/* Send marker if required. */
	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
		return (QLA_FUNCTION_FAILED);

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Build abort mailbox IOCB. */
	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
	if (mbxentry == NULL) {
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

		return (QLA_FUNCTION_FAILED);
	}
	mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
	mbxentry->mb1 = mbxentry->loop_id.extended =
	    cpu_to_le16(iodesc->remote_fcport->loop_id);
	mbxentry->mb2 = LSW(handle_to_abort);
	mbxentry->mb3 = MSW(handle_to_abort);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
	    "%08x.\n", ha->host_no, iodesc->signature,
	    iodesc->remote_fcport->loop_id, handle_to_abort));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
	    "status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
	    iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
	    le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));

	return (QLA_SUCCESS);
}


/**
 * qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
 * @ha: HA context
 * @iodesc: io descriptor
 * @ha_locked: is function called with the hardware lock
 *
 * Returns QLA_SUCCESS if the IOCB was issued.
 */
static int
qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    int ha_locked)
{
	unsigned long flags = 0;
	struct mbx_entry *mbxentry;

	/* Send marker if required. */
	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
		return (QLA_FUNCTION_FAILED);

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Build Get Port Database IOCB. */
	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
	if (mbxentry == NULL) {
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

		return (QLA_FUNCTION_FAILED);
	}
	mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
	mbxentry->mb1 = mbxentry->loop_id.extended =
	    cpu_to_le16(iodesc->remote_fcport->loop_id);
	mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
	mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
	mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
	mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
	mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
	    ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	fc_port_t *remote_fcport;

	remote_fcport = iodesc->remote_fcport;

	/* Ensure the port IDs are consistent. */
	if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
		    "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
		    ha->host_no, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
		    iodesc->d_id.b.domain, iodesc->d_id.b.area,
		    iodesc->d_id.b.al_pa));

		return (QLA_SUCCESS);
	}

	/* Only process the last command. */
	if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
		    "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
		    iodesc->d_id.b.domain, iodesc->d_id.b.area,
		    iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
		    iodesc->idx));

		return (QLA_SUCCESS);
	}

	if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
		    "[%x/%02x%02x%02x] online.\n", ha->host_no,
		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));

		atomic_set(&remote_fcport->state, FCS_ONLINE);
	} else {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
		    "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
		    le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));

		if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
			atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
	}
	remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;

	return (QLA_SUCCESS);
}


/**
 * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
 * @ha: HA context
 * @iodesc: io descriptor
 * @ha_locked: is function called with the hardware lock
 *
 * Returns QLA_SUCCESS if the IOCB was issued.
 */
static int
qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    int ha_locked)
{
	unsigned long flags = 0;
	struct mbx_entry *mbxentry;

	/* Send marker if required. */
	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
		return (QLA_FUNCTION_FAILED);

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Build fabric port logout mailbox IOCB. */
	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
	if (mbxentry == NULL) {
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

		return (QLA_FUNCTION_FAILED);
	}
	mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
	mbxentry->mb1 = mbxentry->loop_id.extended =
	    cpu_to_le16(iodesc->remote_fcport->loop_id);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
	    ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
	    "status=%x mb0=%x mb1=%x.\n", ha->host_no,
	    iodesc->remote_fcport->loop_id,
	    iodesc->remote_fcport->d_id.b.domain,
	    iodesc->remote_fcport->d_id.b.area,
	    iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
	    le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));

	return (QLA_SUCCESS);
}


/**
 * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
 * @ha: HA context
 * @iodesc: io descriptor
 * @d_id: port id for device
 * @ha_locked: is function called with the hardware lock
 *
 * Returns QLA_SUCCESS if the IOCB was issued.
 */
static int
qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    port_id_t *d_id, int ha_locked)
{
	unsigned long flags = 0;
	struct mbx_entry *mbxentry;

	/* Send marker if required. */
	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
		return (QLA_FUNCTION_FAILED);

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Build fabric port login mailbox IOCB. */
	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
	if (mbxentry == NULL) {
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

		return (QLA_FUNCTION_FAILED);
	}
	mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
	mbxentry->mb1 = mbxentry->loop_id.extended =
	    cpu_to_le16(iodesc->remote_fcport->loop_id);
	mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
	mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
	mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
	    "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
	    iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
	    d_id->b.al_pa));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	int rval;
	fc_port_t *fcport, *remote_fcport, *exist_fcport;
	struct io_descriptor *abort_iodesc, *login_iodesc;
	uint16_t status, mb[8];
	uint16_t reuse;
	uint16_t remote_loopid;
	port_id_t remote_did, inuse_did;

	remote_fcport = iodesc->remote_fcport;

	/* Only process the last command. */
	if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
		DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
		    "[%02x%02x%02x], expected %x, received %x.\n",
		    ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
		    iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
		    iodesc->idx));

		/* Free RSCN fcport resources. */
		if (remote_fcport->port_type == FCT_RSCN) {
			DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
			    "fcport %p [%x/%02x%02x%02x] given ignored Login "
			    "IOCB.\n", ha->host_no, remote_fcport,
			    remote_fcport->loop_id,
			    remote_fcport->d_id.b.domain,
			    remote_fcport->d_id.b.area,
			    remote_fcport->d_id.b.al_pa));

			list_del(&remote_fcport->list);
			kfree(remote_fcport);
		}
		return (QLA_SUCCESS);
	}

	status = le16_to_cpu(mbxstat->status);
	mb[0] = le16_to_cpu(mbxstat->mb0);
	mb[1] = le16_to_cpu(mbxstat->mb1);
	mb[2] = le16_to_cpu(mbxstat->mb2);
	mb[6] = le16_to_cpu(mbxstat->mb6);
	mb[7] = le16_to_cpu(mbxstat->mb7);

	/* Good status? */
	if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
	    mb[0] == MBS_COMMAND_COMPLETE) {

		DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
		    "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
		    mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
		    mbxstat->port_name[2], mbxstat->port_name[3],
		    mbxstat->port_name[4], mbxstat->port_name[5],
		    mbxstat->port_name[6], mbxstat->port_name[7]));

		memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
		memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);

		/* Is the device already in our fcports list? */
		if (remote_fcport->port_type != FCT_RSCN) {
			DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
			    "[%x/%02x%02x%02x] online.\n", ha->host_no,
			    remote_fcport->loop_id,
			    remote_fcport->d_id.b.domain,
			    remote_fcport->d_id.b.area,
			    remote_fcport->d_id.b.al_pa));

			qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);

			return (QLA_SUCCESS);
		}

		/* Does the RSCN portname already exist in our fcports list? */
		exist_fcport = NULL;
		list_for_each_entry(fcport, &ha->fcports, list) {
			if (memcmp(remote_fcport->port_name, fcport->port_name,
			    WWN_SIZE) == 0) {
				exist_fcport = fcport;
				break;
			}
		}
		if (exist_fcport != NULL) {
			DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
			    "fcport in fcports list [%p].\n", ha->host_no,
			    exist_fcport));

			/* Abort any ADISC that could have been sent. */
			if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
			    exist_fcport->iodesc_idx_sent <
			    MAX_IO_DESCRIPTORS &&
			    ha->io_descriptors[exist_fcport->iodesc_idx_sent].
			    cb_idx == ADISC_PORT_IOCB_CB) {

				abort_iodesc = qla2x00_alloc_iodesc(ha);
				if (abort_iodesc) {
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- issuing abort to outstanding "
					    "Adisc [%x/%02x%02x%02x].\n",
					    ha->host_no, remote_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));

					abort_iodesc->cb_idx = ABORT_IOCB_CB;
					abort_iodesc->d_id.b24 =
					    exist_fcport->d_id.b24;
					abort_iodesc->remote_fcport =
					    exist_fcport;
					exist_fcport->iodesc_idx_sent =
					    abort_iodesc->idx;
					qla2x00_send_abort_iocb(ha,
					    abort_iodesc, ha->io_descriptors[
					     exist_fcport->iodesc_idx_sent].
					      signature, 1);
				} else {
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- unable to abort outstanding "
					    "Adisc [%x/%02x%02x%02x].\n",
					    ha->host_no, remote_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));
				}
			}

			/*
			 * If the existing fcport is waiting to send an ADISC
			 * or LOGIN, then reuse remote fcport (RSCN) to
			 * continue waiting.
			 */
			reuse = 0;
			remote_loopid = remote_fcport->loop_id;
			remote_did.b24 = remote_fcport->d_id.b24;
			if (exist_fcport->iodesc_idx_sent ==
			    IODESC_ADISC_NEEDED ||
			    exist_fcport->iodesc_idx_sent ==
			    IODESC_LOGIN_NEEDED) {
				DEBUG14(printk("scsi(%ld): Login IOCB -- "
				    "existing fcport [%x/%02x%02x%02x] "
				    "waiting for IO descriptor, reuse RSCN "
				    "fcport.\n", ha->host_no,
				    exist_fcport->loop_id,
				    exist_fcport->d_id.b.domain,
				    exist_fcport->d_id.b.area,
				    exist_fcport->d_id.b.al_pa));

				reuse++;
				remote_fcport->iodesc_idx_sent =
				    exist_fcport->iodesc_idx_sent;
				exist_fcport->iodesc_idx_sent =
				    IODESC_INVALID_INDEX;
				remote_fcport->loop_id = exist_fcport->loop_id;
				remote_fcport->d_id.b24 =
				    exist_fcport->d_id.b24;
			}

			/* Logout the old loopid. */
			if (!reuse &&
			    exist_fcport->loop_id != remote_fcport->loop_id &&
			    exist_fcport->loop_id != FC_NO_LOOP_ID) {
				login_iodesc = qla2x00_alloc_iodesc(ha);
				if (login_iodesc) {
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- issuing logout to free old "
					    "loop id [%x/%02x%02x%02x].\n",
					    ha->host_no, exist_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));

					login_iodesc->cb_idx =
					    LOGOUT_PORT_IOCB_CB;
					login_iodesc->d_id.b24 =
					    exist_fcport->d_id.b24;
					login_iodesc->remote_fcport =
					    exist_fcport;
					exist_fcport->iodesc_idx_sent =
					    login_iodesc->idx;
					qla2x00_send_logout_iocb(ha,
					    login_iodesc, 1);
				} else {
					/* Ran out of IO descriptiors. */
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- unable to logout to free old "
					    "loop id [%x/%02x%02x%02x].\n",
					    ha->host_no, exist_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));

					exist_fcport->iodesc_idx_sent =
					    IODESC_INVALID_INDEX;
				}

			}

			/* Update existing fcport with remote fcport info. */
			DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
			    "existing fcport [%x/%02x%02x%02x] online.\n",
			    ha->host_no, remote_loopid, remote_did.b.domain,
			    remote_did.b.area, remote_did.b.al_pa));

			memcpy(exist_fcport->node_name,
			    remote_fcport->node_name, WWN_SIZE);
			exist_fcport->loop_id = remote_loopid;
			exist_fcport->d_id.b24 = remote_did.b24;
			qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);

			/* Finally, free the remote (RSCN) fcport. */
			if (!reuse) {
				DEBUG14(printk("scsi(%ld): Login IOCB -- "
				    "Freeing RSCN fcport %p "
				    "[%x/%02x%02x%02x].\n", ha->host_no,
				    remote_fcport, remote_fcport->loop_id,
				    remote_fcport->d_id.b.domain,
				    remote_fcport->d_id.b.area,
				    remote_fcport->d_id.b.al_pa));

				list_del(&remote_fcport->list);
				kfree(remote_fcport);
			}

			return (QLA_SUCCESS);
		}

		/*
		 * A new device has been added, move the RSCN fcport to our
		 * fcports list.
		 */
		DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
		    "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));

		list_del(&remote_fcport->list);
		remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
		qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
		list_add_tail(&remote_fcport->list, &ha->fcports);
		set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
	} else {
		/* Handle login failure. */
		if (remote_fcport->login_retry != 0) {
			if (mb[0] == MBS_LOOP_ID_USED) {
				inuse_did.b.domain = LSB(mb[1]);
				inuse_did.b.area = MSB(mb[2]);
				inuse_did.b.al_pa = LSB(mb[2]);

				DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
				    "id [%x] used by port id [%02x%02x%02x].\n",
				    ha->host_no, remote_fcport->loop_id,
				    inuse_did.b.domain, inuse_did.b.area,
				    inuse_did.b.al_pa));

				if (remote_fcport->d_id.b24 ==
				    INVALID_PORT_ID) {
					/*
					 * Invalid port id means we are trying
					 * to login to a remote port with just
					 * a loop id without knowing about the
					 * port id.  Copy the port id and try
					 * again.
					 */
					remote_fcport->d_id.b24 = inuse_did.b24;
					iodesc->d_id.b24 = inuse_did.b24;
				} else {
					remote_fcport->loop_id++;
					rval = qla2x00_find_new_loop_id(ha,
					    remote_fcport);
					if (rval == QLA_FUNCTION_FAILED) {
						/* No more loop ids. */
						return (QLA_SUCCESS);
					}
				}
			} else if (mb[0] == MBS_PORT_ID_USED) {
				/*
				 * Device has another loop ID.  The firmware
				 * group recommends the driver perform an
				 * implicit login with the specified ID.
				 */
				DEBUG14(printk("scsi(%ld): Login IOCB -- port "
				    "id [%02x%02x%02x] already assigned to "
				    "loop id [%x].\n", ha->host_no,
				    iodesc->d_id.b.domain, iodesc->d_id.b.area,
				    iodesc->d_id.b.al_pa, mb[1]));

				remote_fcport->loop_id = mb[1];

			} else {
				/* Unable to perform login, try again. */
				DEBUG14(printk("scsi(%ld): Login IOCB -- "
				    "failed login [%x/%02x%02x%02x], status=%x "
				    "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
				    ha->host_no, remote_fcport->loop_id,
				    iodesc->d_id.b.domain, iodesc->d_id.b.area,
				    iodesc->d_id.b.al_pa, status, mb[0], mb[1],
				    mb[2], mb[6], mb[7]));
			}

			/* Reissue Login with the same IO descriptor. */
			iodesc->signature =
			    qla2x00_iodesc_to_handle(iodesc);
			iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
			iodesc->d_id.b24 = remote_fcport->d_id.b24;
			remote_fcport->iodesc_idx_sent = iodesc->idx;
			remote_fcport->login_retry--;

			DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
			    "login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
			    remote_fcport->loop_id,
			    remote_fcport->d_id.b.domain,
			    remote_fcport->d_id.b.area,
			    remote_fcport->d_id.b.al_pa,
			    remote_fcport->login_retry));

			qla2x00_send_login_iocb(ha, iodesc,
			    &remote_fcport->d_id, 1);

			return (QLA_FUNCTION_FAILED);
		} else {
			/* No more logins, mark device dead. */
			DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
			    "login [%x/%02x%02x%02x] after retries, status=%x "
			    "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
			    ha->host_no, remote_fcport->loop_id,
			    iodesc->d_id.b.domain, iodesc->d_id.b.area,
			    iodesc->d_id.b.al_pa, status, mb[0], mb[1],
			    mb[2], mb[6], mb[7]));

			atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
			if (remote_fcport->port_type == FCT_RSCN) {
				DEBUG14(printk("scsi(%ld): Login IOCB -- "
				    "Freeing dead RSCN fcport %p "
				    "[%x/%02x%02x%02x].\n", ha->host_no,
				    remote_fcport, remote_fcport->loop_id,
				    remote_fcport->d_id.b.domain,
				    remote_fcport->d_id.b.area,
				    remote_fcport->d_id.b.al_pa));

				list_del(&remote_fcport->list);
				kfree(remote_fcport);
			}
		}
	}

	return (QLA_SUCCESS);
}


/**
 * IO descriptor processing routines.
 **/

/**
 * qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
 * @ha: HA context
 * @flags: allocation flags
 *
 * Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
 */
fc_port_t *
qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, gfp_t flags)
{
	fc_port_t *fcport;

	fcport = qla2x00_alloc_fcport(ha, flags);
	if (fcport == NULL)
		return (fcport);

	/* Setup RSCN fcport structure. */
	fcport->port_type = FCT_RSCN;

	return (fcport);
}

/**
 * qla2x00_handle_port_rscn() - Handle port RSCN.
 * @ha: HA context
 * @rscn_entry: RSCN entry
 * @fcport: fcport entry to updated
 *
 * Returns QLA_SUCCESS if the port RSCN was handled.
 */
int
qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
    fc_port_t *known_fcport, int ha_locked)
{
	int	rval;
	port_id_t rscn_pid;
	fc_port_t *fcport, *remote_fcport, *rscn_fcport;
	struct io_descriptor *iodesc;

	remote_fcport = NULL;
	rscn_fcport = NULL;

	/* Prepare port id based on incoming entries. */
	if (known_fcport) {
		rscn_pid.b24 = known_fcport->d_id.b24;
		remote_fcport = known_fcport;

		DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
		    "fcport [%02x%02x%02x].\n", ha->host_no,
		    remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
		    remote_fcport->d_id.b.al_pa));
	} else {
		rscn_pid.b.domain = LSB(MSW(rscn_entry));
		rscn_pid.b.area = MSB(LSW(rscn_entry));
		rscn_pid.b.al_pa = LSB(LSW(rscn_entry));

		DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
		    "port id [%02x%02x%02x].\n", ha->host_no,
		    rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));

		/*
		 * Search fcport lists for a known entry at the specified port
		 * ID.
		 */
		list_for_each_entry(fcport, &ha->fcports, list) {
		    if (rscn_pid.b24 == fcport->d_id.b24) {
			    remote_fcport = fcport;
			    break;
		    }
		}
		list_for_each_entry(fcport, &ha->rscn_fcports, list) {
		    if (rscn_pid.b24 == fcport->d_id.b24) {
			    rscn_fcport = fcport;
			    break;
		    }
		}
		if (remote_fcport == NULL)
		    remote_fcport = rscn_fcport;
	}

	/*
	 * If the port is already in our fcport list and online, send an ADISC
	 * to see if it's still alive.  Issue login if a new fcport or the known
	 * fcport is currently offline.
	 */
	if (remote_fcport) {
		/*
		 * No need to send request if the remote fcport is currently
		 * waiting for an available io descriptor.
		 */
		if (known_fcport == NULL &&
		    (remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
		    remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
			/*
			 * If previous waiting io descriptor is an ADISC, then
			 * the new RSCN may come from a new remote fcport being
			 * plugged into the same location.
			 */
			if (remote_fcport->port_type == FCT_RSCN) {
			    remote_fcport->iodesc_idx_sent =
				IODESC_LOGIN_NEEDED;
			} else if (remote_fcport->iodesc_idx_sent ==
			    IODESC_ADISC_NEEDED) {
				fc_port_t *new_fcport;

				remote_fcport->iodesc_idx_sent =
				    IODESC_INVALID_INDEX;

				/* Create new fcport for later login. */
				new_fcport = qla2x00_alloc_rscn_fcport(ha,
				    ha_locked ? GFP_ATOMIC: GFP_KERNEL);
				if (new_fcport) {
					DEBUG14(printk("scsi(%ld): Handle RSCN "
					    "-- creating RSCN fcport %p for "
					    "future login.\n", ha->host_no,
					    new_fcport));

					new_fcport->d_id.b24 =
					    remote_fcport->d_id.b24;
					new_fcport->iodesc_idx_sent =
					    IODESC_LOGIN_NEEDED;

					list_add_tail(&new_fcport->list,
					    &ha->rscn_fcports);
					set_bit(IODESC_PROCESS_NEEDED,
					    &ha->dpc_flags);
				} else {
					DEBUG14(printk("scsi(%ld): Handle RSCN "
					    "-- unable to allocate RSCN fcport "
					    "for future login.\n",
					    ha->host_no));
				}
			}
			return (QLA_SUCCESS);
		}

		/* Send ADISC if the fcport is online */
		if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
		    remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {

			atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);

			iodesc = qla2x00_alloc_iodesc(ha);
			if (iodesc == NULL) {
				/* Mark fcport for later adisc processing */
				DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
				    "enough IO descriptors for Adisc, flag "
				    "for later processing.\n", ha->host_no));

				remote_fcport->iodesc_idx_sent =
				    IODESC_ADISC_NEEDED;
				set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);

				return (QLA_SUCCESS);
			}

			iodesc->cb_idx = ADISC_PORT_IOCB_CB;
			iodesc->d_id.b24 = rscn_pid.b24;
			iodesc->remote_fcport = remote_fcport;
			remote_fcport->iodesc_idx_sent = iodesc->idx;
			qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);

			return (QLA_SUCCESS);
		} else if (remote_fcport->iodesc_idx_sent <
		    MAX_IO_DESCRIPTORS &&
		    ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
		    ADISC_PORT_IOCB_CB) {
			/*
			 * Receiving another RSCN while an ADISC is pending,
			 * abort the IOCB.  Use the same descriptor for the
			 * abort.
			 */
			uint32_t handle_to_abort;

			iodesc = &ha->io_descriptors[
				remote_fcport->iodesc_idx_sent];
			qla2x00_remove_iodesc_timer(iodesc);
			handle_to_abort = iodesc->signature;
			iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
			iodesc->cb_idx = ABORT_IOCB_CB;
			iodesc->d_id.b24 = remote_fcport->d_id.b24;
			iodesc->remote_fcport = remote_fcport;
			remote_fcport->iodesc_idx_sent = iodesc->idx;

			DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
			    "abort to outstanding Adisc [%x/%02x%02x%02x].\n",
			    ha->host_no, remote_fcport->loop_id,
			    iodesc->d_id.b.domain, iodesc->d_id.b.area,
			    iodesc->d_id.b.al_pa));

			qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
			    ha_locked);
		}
	}

	/* We need to login to the remote port, find it. */
	if (known_fcport) {
		remote_fcport = known_fcport;
	} else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
	    rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
	    ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
	    LOGIN_PORT_IOCB_CB) {
		/*
		 * Ignore duplicate RSCN on fcport which has already
		 * initiated a login IOCB.
		 */
		DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
		    "already sent to [%02x%02x%02x].\n", ha->host_no,
		    rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
		    rscn_fcport->d_id.b.al_pa));

		return (QLA_SUCCESS);
	} else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
	    rscn_fcport != remote_fcport) {
		/* Reuse same rscn fcport. */
		DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
		    "[%02x%02x%02x].\n", ha->host_no,
		    rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
		    rscn_fcport->d_id.b.al_pa));

		remote_fcport = rscn_fcport;
	} else {
		/* Create new fcport for later login. */
		remote_fcport = qla2x00_alloc_rscn_fcport(ha,
		    ha_locked ? GFP_ATOMIC: GFP_KERNEL);
		list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
	}
	if (remote_fcport == NULL)
		return (QLA_SUCCESS);

	/* Prepare fcport for login. */
	atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
	remote_fcport->login_retry = 3; /* ha->login_retry_count; */
	remote_fcport->d_id.b24 = rscn_pid.b24;

	iodesc = qla2x00_alloc_iodesc(ha);
	if (iodesc == NULL) {
		/* Mark fcport for later adisc processing. */
		DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
		    "descriptors for Login, flag for later processing.\n",
		    ha->host_no));

		remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
		set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);

		return (QLA_SUCCESS);
	}

	if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
		remote_fcport->loop_id = ha->min_external_loopid;

		rval = qla2x00_find_new_loop_id(ha, remote_fcport);
		if (rval == QLA_FUNCTION_FAILED) {
			/* No more loop ids, failed. */
			DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
			    "loop id to perform Login, failed.\n",
			    ha->host_no));

			return (rval);
		}
	}

	iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
	iodesc->d_id.b24 = rscn_pid.b24;
	iodesc->remote_fcport = remote_fcport;
	remote_fcport->iodesc_idx_sent = iodesc->idx;

	DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
	    "[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
	    iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));

	qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);

	return (QLA_SUCCESS);
}

/**
 * qla2x00_process_iodesc() - Complete IO descriptor processing.
 * @ha: HA context
 * @mbxstat: Mailbox IOCB status
 */
void
qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
{
	int rval;
	uint32_t signature;
	fc_port_t *fcport;
	struct io_descriptor *iodesc;

	signature = mbxstat->handle;

	DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
	    ha->host_no, signature));

	/* Retrieve proper IO descriptor. */
	iodesc = qla2x00_handle_to_iodesc(ha, signature);
	if (iodesc == NULL) {
		DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
		    "incorrect signature %08x.\n", ha->host_no, signature));

		return;
	}

	/* Stop IO descriptor timer. */
	qla2x00_remove_iodesc_timer(iodesc);

	/* Verify signature match. */
	if (iodesc->signature != signature) {
		DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
		    "signature mismatch, sent %08x, received %08x.\n",
		    ha->host_no, iodesc->signature, signature));

		return;
	}

	/* Go with IOCB callback. */
	rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
	if (rval != QLA_SUCCESS) {
		/* IO descriptor reused by callback. */
		return;
	}

	qla2x00_free_iodesc(iodesc);

	if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
		/* Scan our fcports list for any RSCN requests. */
		list_for_each_entry(fcport, &ha->fcports, list) {
			if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
			    fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
				qla2x00_handle_port_rscn(ha, 0, fcport, 1);
				return;
			}
		}

		/* Scan our RSCN fcports list for any RSCN requests. */
		list_for_each_entry(fcport, &ha->rscn_fcports, list) {
			if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
			    fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
				qla2x00_handle_port_rscn(ha, 0, fcport, 1);
				return;
			}
		}
	}
	clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
}

/**
 * qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
 * @ha: HA context
 *
 * This routine will also delete any RSCN entries related to the outstanding
 * IO descriptors.
 */
void
qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
{
	fc_port_t *fcport, *fcptemp;

	clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);

	/* Abort all IO descriptors. */
	qla2x00_init_io_descriptors(ha);

	/* Reset all pending IO descriptors in fcports list. */
	list_for_each_entry(fcport, &ha->fcports, list) {
		fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
	}

	/* Reset all pending IO descriptors in rscn fcports list. */
	list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
		DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
		    "%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
		    fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
		    fcport->d_id.b.al_pa));

		list_del(&fcport->list);
		kfree(fcport);
	}
}
OpenPOWER on IntegriCloud