aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/qla2xxx/qla_isr.c
blob: 874d802edb7de482c79774bd760bdf61a7210ca4 (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
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2008 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */
#include "qla_def.h"

#include <linux/delay.h>
#include <scsi/scsi_tcq.h>

static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
static void qla2x00_status_entry(scsi_qla_host_t *, void *);
static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);

/**
 * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2100_intr_handler(int irq, void *dev_id)
{
	scsi_qla_host_t	*ha;
	struct device_reg_2xxx __iomem *reg;
	int		status;
	unsigned long	iter;
	uint16_t	hccr;
	uint16_t	mb[4];

	ha = (scsi_qla_host_t *) dev_id;
	if (!ha) {
		printk(KERN_INFO
		    "%s(): NULL host pointer\n", __func__);
		return (IRQ_NONE);
	}

	reg = &ha->iobase->isp;
	status = 0;

	spin_lock(&ha->hardware_lock);
	for (iter = 50; iter--; ) {
		hccr = RD_REG_WORD(&reg->hccr);
		if (hccr & HCCR_RISC_PAUSE) {
			if (pci_channel_offline(ha->pdev))
				break;

			/*
			 * Issue a "HARD" reset in order for the RISC interrupt
			 * bit to be cleared.  Schedule a big hammmer to get
			 * out of the RISC PAUSED state.
			 */
			WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
			RD_REG_WORD(&reg->hccr);

			ha->isp_ops->fw_dump(ha, 1);
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
			break;

		if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
			WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
			RD_REG_WORD(&reg->hccr);

			/* Get mailbox data. */
			mb[0] = RD_MAILBOX_REG(ha, reg, 0);
			if (mb[0] > 0x3fff && mb[0] < 0x8000) {
				qla2x00_mbx_completion(ha, mb[0]);
				status |= MBX_INTERRUPT;
			} else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
				mb[1] = RD_MAILBOX_REG(ha, reg, 1);
				mb[2] = RD_MAILBOX_REG(ha, reg, 2);
				mb[3] = RD_MAILBOX_REG(ha, reg, 3);
				qla2x00_async_event(ha, mb);
			} else {
				/*EMPTY*/
				DEBUG2(printk("scsi(%ld): Unrecognized "
				    "interrupt type (%d).\n",
				    ha->host_no, mb[0]));
			}
			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			RD_REG_WORD(&reg->semaphore);
		} else {
			qla2x00_process_response_queue(ha);

			WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
			RD_REG_WORD(&reg->hccr);
		}
	}
	spin_unlock(&ha->hardware_lock);

	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		complete(&ha->mbx_intr_comp);
	}

	return (IRQ_HANDLED);
}

/**
 * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2300_intr_handler(int irq, void *dev_id)
{
	scsi_qla_host_t	*ha;
	struct device_reg_2xxx __iomem *reg;
	int		status;
	unsigned long	iter;
	uint32_t	stat;
	uint16_t	hccr;
	uint16_t	mb[4];

	ha = (scsi_qla_host_t *) dev_id;
	if (!ha) {
		printk(KERN_INFO
		    "%s(): NULL host pointer\n", __func__);
		return (IRQ_NONE);
	}

	reg = &ha->iobase->isp;
	status = 0;

	spin_lock(&ha->hardware_lock);
	for (iter = 50; iter--; ) {
		stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
		if (stat & HSR_RISC_PAUSED) {
			if (pci_channel_offline(ha->pdev))
				break;

			hccr = RD_REG_WORD(&reg->hccr);
			if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
				qla_printk(KERN_INFO, ha, "Parity error -- "
				    "HCCR=%x, Dumping firmware!\n", hccr);
			else
				qla_printk(KERN_INFO, ha, "RISC paused -- "
				    "HCCR=%x, Dumping firmware!\n", hccr);

			/*
			 * Issue a "HARD" reset in order for the RISC
			 * interrupt bit to be cleared.  Schedule a big
			 * hammmer to get out of the RISC PAUSED state.
			 */
			WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
			RD_REG_WORD(&reg->hccr);

			ha->isp_ops->fw_dump(ha, 1);
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((stat & HSR_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
			qla2x00_mbx_completion(ha, MSW(stat));
			status |= MBX_INTERRUPT;

			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			break;
		case 0x12:
			mb[0] = MSW(stat);
			mb[1] = RD_MAILBOX_REG(ha, reg, 1);
			mb[2] = RD_MAILBOX_REG(ha, reg, 2);
			mb[3] = RD_MAILBOX_REG(ha, reg, 3);
			qla2x00_async_event(ha, mb);
			break;
		case 0x13:
			qla2x00_process_response_queue(ha);
			break;
		case 0x15:
			mb[0] = MBA_CMPLT_1_16BIT;
			mb[1] = MSW(stat);
			qla2x00_async_event(ha, mb);
			break;
		case 0x16:
			mb[0] = MBA_SCSI_COMPLETION;
			mb[1] = MSW(stat);
			mb[2] = RD_MAILBOX_REG(ha, reg, 2);
			qla2x00_async_event(ha, mb);
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
			    ha->host_no, stat & 0xff));
			break;
		}
		WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
		RD_REG_WORD_RELAXED(&reg->hccr);
	}
	spin_unlock(&ha->hardware_lock);

	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		complete(&ha->mbx_intr_comp);
	}

	return (IRQ_HANDLED);
}

/**
 * qla2x00_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

	/* Load return mailbox registers. */
	ha->flags.mbox_int = 1;
	ha->mailbox_out[0] = mb0;
	wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);

	for (cnt = 1; cnt < ha->mbx_count; cnt++) {
		if (IS_QLA2200(ha) && cnt == 8)
			wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
		if (cnt == 4 || cnt == 5)
			ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
		else
			ha->mailbox_out[cnt] = RD_REG_WORD(wptr);

		wptr++;
	}

	if (ha->mcp) {
		DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
		    __func__, ha->host_no, ha->mcp->mb[0]));
	} else {
		DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
		    __func__, ha->host_no));
	}
}

/**
 * qla2x00_async_event() - Process aynchronous events.
 * @ha: SCSI driver HA context
 * @mb: Mailbox registers (0 - 3)
 */
void
qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
{
#define LS_UNKNOWN	2
	static char	*link_speeds[5] = { "1", "2", "?", "4", "8" };
	char		*link_speed;
	uint16_t	handle_cnt;
	uint16_t	cnt;
	uint32_t	handles[5];
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
	uint32_t	rscn_entry, host_pid;
	uint8_t		rscn_queue_index;
	unsigned long	flags;

	/* Setup to process RIO completion. */
	handle_cnt = 0;
	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:
		handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
		handle_cnt = 1;
		break;
	case MBA_CMPLT_1_16BIT:
		handles[0] = mb[1];
		handle_cnt = 1;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_3_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
		handle_cnt = 3;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_4_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handle_cnt = 4;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_5_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
		handle_cnt = 5;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_32BIT:
		handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
		handles[1] = le32_to_cpu(
		    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
		    RD_MAILBOX_REG(ha, reg, 6));
		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	default:
		break;
	}

	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:	/* Fast Post */
		if (!ha->flags.online)
			break;

		for (cnt = 0; cnt < handle_cnt; cnt++)
			qla2x00_process_completed_request(ha, handles[cnt]);
		break;

	case MBA_RESET:			/* Reset */
		DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));

		set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
		break;

	case MBA_SYSTEM_ERR:		/* System Error */
		qla_printk(KERN_INFO, ha,
		    "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
		    mb[1], mb[2], mb[3]);

		qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
		ha->isp_ops->fw_dump(ha, 1);

		if (IS_FWI2_CAPABLE(ha)) {
			if (mb[1] == 0 && mb[2] == 0) {
				qla_printk(KERN_ERR, ha,
				    "Unrecoverable Hardware Error: adapter "
				    "marked OFFLINE!\n");
				ha->flags.online = 0;
			} else
				set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		} else if (mb[1] == 0) {
			qla_printk(KERN_INFO, ha,
			    "Unrecoverable Hardware Error: adapter marked "
			    "OFFLINE!\n");
			ha->flags.online = 0;
		} else
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		break;

	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
		DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");

		qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		break;

	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
		DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");

		qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		break;

	case MBA_WAKEUP_THRES:		/* Request Queue Wake-up */
		DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
		    ha->host_no));
		break;

	case MBA_LIP_OCCURRED:		/* Loop Initialization Procedure */
		DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
		    mb[1]));
		qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);

		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(ha, 1);
		}

		if (ha->parent) {
			atomic_set(&ha->vp_state, VP_FAILED);
			fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
		}

		set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
		set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);

		ha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(ha, FCH_EVT_LIP, mb[1]);
		break;

	case MBA_LOOP_UP:		/* Loop Up Event */
		if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
			link_speed = link_speeds[0];
			ha->link_data_rate = PORT_SPEED_1GB;
		} else {
			link_speed = link_speeds[LS_UNKNOWN];
			if (mb[1] < 5)
				link_speed = link_speeds[mb[1]];
			ha->link_data_rate = mb[1];
		}

		DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
		    ha->host_no, link_speed));
		qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
		    link_speed);

		ha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(ha, FCH_EVT_LINKUP, ha->link_data_rate);
		break;

	case MBA_LOOP_DOWN:		/* Loop Down Event */
		DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
		    "(%x %x %x).\n", ha->host_no, mb[1], mb[2], mb[3]));
		qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
		    mb[1], mb[2], mb[3]);

		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
			ha->device_flags |= DFLG_NO_CABLE;
			qla2x00_mark_all_devices_lost(ha, 1);
		}

		if (ha->parent) {
			atomic_set(&ha->vp_state, VP_FAILED);
			fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
		}

		ha->flags.management_server_logged_in = 0;
		ha->link_data_rate = PORT_SPEED_UNKNOWN;
		qla2x00_post_aen_work(ha, FCH_EVT_LINKDOWN, 0);
		break;

	case MBA_LIP_RESET:		/* LIP reset occurred */
		DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
		    ha->host_no, mb[1]));
		qla_printk(KERN_INFO, ha,
		    "LIP reset occured (%x).\n", mb[1]);

		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(ha, 1);
		}

		if (ha->parent) {
			atomic_set(&ha->vp_state, VP_FAILED);
			fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
		}

		set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);

		ha->operating_mode = LOOP;
		ha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(ha, FCH_EVT_LIPRESET, mb[1]);
		break;

	case MBA_POINT_TO_POINT:	/* Point-to-Point */
		if (IS_QLA2100(ha))
			break;

		DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
		    ha->host_no));

		/*
		 * Until there's a transition from loop down to loop up, treat
		 * this as loop down only.
		 */
		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			if (!atomic_read(&ha->loop_down_timer))
				atomic_set(&ha->loop_down_timer,
				    LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(ha, 1);
		}

		if (ha->parent) {
			atomic_set(&ha->vp_state, VP_FAILED);
			fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
		}

		if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
			set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
		}
		set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
		set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);

		ha->flags.gpsc_supported = 1;
		ha->flags.management_server_logged_in = 0;
		break;

	case MBA_CHG_IN_CONNECTION:	/* Change in connection mode */
		if (IS_QLA2100(ha))
			break;

		DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
		    "received.\n",
		    ha->host_no));
		qla_printk(KERN_INFO, ha,
		    "Configuration change detected: value=%x.\n", mb[1]);

		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			if (!atomic_read(&ha->loop_down_timer))
				atomic_set(&ha->loop_down_timer,
				    LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(ha, 1);
		}

		if (ha->parent) {
			atomic_set(&ha->vp_state, VP_FAILED);
			fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
		}

		set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
		set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
		break;

	case MBA_PORT_UPDATE:		/* Port database update */
		/*
		 * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
		 * event etc. earlier indicating loop is down) then process
		 * it.  Otherwise ignore it and Wait for RSCN to come in.
		 */
		atomic_set(&ha->loop_down_timer, 0);
		if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
		    atomic_read(&ha->loop_state) != LOOP_DEAD) {
			DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
			    "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
			    mb[2], mb[3]));
			break;
		}

		DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
		    "scsi(%ld): Port database changed %04x %04x %04x.\n",
		    ha->host_no, mb[1], mb[2], mb[3]));

		/*
		 * Mark all devices as missing so we will login again.
		 */
		atomic_set(&ha->loop_state, LOOP_UP);

		qla2x00_mark_all_devices_lost(ha, 1);

		ha->flags.rscn_queue_overflow = 1;

		set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
		set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
		break;

	case MBA_RSCN_UPDATE:		/* State Change Registration */
		/* Check if the Vport has issued a SCR */
		if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
			break;
		/* Only handle SCNs for our Vport index. */
		if (ha->parent && ha->vp_idx != (mb[3] & 0xff))
			break;

		DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
		    "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
		    ha->host_no, mb[1], mb[2], mb[3]));

		rscn_entry = (mb[1] << 16) | mb[2];
		host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
		    ha->d_id.b.al_pa;
		if (rscn_entry == host_pid) {
			DEBUG(printk(KERN_INFO
			    "scsi(%ld): Ignoring RSCN update to local host "
			    "port ID (%06x)\n",
			    ha->host_no, host_pid));
			break;
		}

		rscn_queue_index = ha->rscn_in_ptr + 1;
		if (rscn_queue_index == MAX_RSCN_COUNT)
			rscn_queue_index = 0;
		if (rscn_queue_index != ha->rscn_out_ptr) {
			ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
			ha->rscn_in_ptr = rscn_queue_index;
		} else {
			ha->flags.rscn_queue_overflow = 1;
		}

		atomic_set(&ha->loop_state, LOOP_UPDATE);
		atomic_set(&ha->loop_down_timer, 0);
		ha->flags.management_server_logged_in = 0;

		set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
		set_bit(RSCN_UPDATE, &ha->dpc_flags);
		qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
		break;

	/* case MBA_RIO_RESPONSE: */
	case MBA_ZIO_RESPONSE:
		DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
		    "scsi(%ld): [R|Z]IO update completion.\n",
		    ha->host_no));

		if (IS_FWI2_CAPABLE(ha))
			qla24xx_process_response_queue(ha);
		else
			qla2x00_process_response_queue(ha);
		break;

	case MBA_DISCARD_RND_FRAME:
		DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
		    "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
		break;

	case MBA_TRACE_NOTIFICATION:
		DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
		ha->host_no, mb[1], mb[2]));
		break;

	case MBA_ISP84XX_ALERT:
		DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
		    "%04x %04x %04x\n", ha->host_no, mb[1], mb[2], mb[3]));

		spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
		switch (mb[1]) {
		case A84_PANIC_RECOVERY:
			qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
			    "%04x %04x\n", mb[2], mb[3]);
			break;
		case A84_OP_LOGIN_COMPLETE:
			ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
			DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
			    "firmware version %x\n", ha->cs84xx->op_fw_version));
			break;
		case A84_DIAG_LOGIN_COMPLETE:
			ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
			DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
			    "diagnostic firmware version %x\n",
			    ha->cs84xx->diag_fw_version));
			break;
		case A84_GOLD_LOGIN_COMPLETE:
			ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
			ha->cs84xx->fw_update = 1;
			DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
			    "firmware version %x\n",
			    ha->cs84xx->gold_fw_version));
			break;
		default:
			qla_printk(KERN_ERR, ha,
			    "Alert 84xx: Invalid Alert %04x %04x %04x\n",
			    mb[1], mb[2], mb[3]);
		}
		spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
		break;
	}

	if (!ha->parent && ha->num_vhosts)
		qla2x00_alert_all_vps(ha, mb);
}

static void
qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
{
	fc_port_t *fcport = data;

	if (fcport->ha->max_q_depth <= sdev->queue_depth)
		return;

	if (sdev->ordered_tags)
		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
		    sdev->queue_depth + 1);
	else
		scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
		    sdev->queue_depth + 1);

	fcport->last_ramp_up = jiffies;

	DEBUG2(qla_printk(KERN_INFO, fcport->ha,
	    "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
	    fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
	    sdev->queue_depth));
}

static void
qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
{
	fc_port_t *fcport = data;

	if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
		return;

	DEBUG2(qla_printk(KERN_INFO, fcport->ha,
	    "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
	    fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
	    sdev->queue_depth));
}

static inline void
qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
{
	fc_port_t *fcport;
	struct scsi_device *sdev;

	sdev = sp->cmd->device;
	if (sdev->queue_depth >= ha->max_q_depth)
		return;

	fcport = sp->fcport;
	if (time_before(jiffies,
	    fcport->last_ramp_up + ql2xqfullrampup * HZ))
		return;
	if (time_before(jiffies,
	    fcport->last_queue_full + ql2xqfullrampup * HZ))
		return;

	starget_for_each_device(sdev->sdev_target, fcport,
	    qla2x00_adjust_sdev_qdepth_up);
}

/**
 * qla2x00_process_completed_request() - Process a Fast Post response.
 * @ha: SCSI driver HA context
 * @index: SRB index
 */
static void
qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
{
	srb_t *sp;

	/* Validate handle. */
	if (index >= MAX_OUTSTANDING_COMMANDS) {
		DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
		    ha->host_no, index));
		qla_printk(KERN_WARNING, ha,
		    "Invalid SCSI completion handle %d.\n", index);

		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		return;
	}

	sp = ha->outstanding_cmds[index];
	if (sp) {
		/* Free outstanding command slot. */
		ha->outstanding_cmds[index] = NULL;

		CMD_COMPL_STATUS(sp->cmd) = 0L;
		CMD_SCSI_STATUS(sp->cmd) = 0L;

		/* Save ISP completion status */
		sp->cmd->result = DID_OK << 16;

		qla2x00_ramp_up_queue_depth(ha, sp);
		qla2x00_sp_compl(ha, sp);
	} else {
		DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha,
		    "Invalid ISP SCSI completion handle\n");

		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
	}
}

/**
 * qla2x00_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void
qla2x00_process_response_queue(struct scsi_qla_host *ha)
{
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
	sts_entry_t	*pkt;
	uint16_t        handle_cnt;
	uint16_t        cnt;

	if (!ha->flags.online)
		return;

	while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
		pkt = (sts_entry_t *)ha->response_ring_ptr;

		ha->rsp_ring_index++;
		if (ha->rsp_ring_index == ha->response_q_length) {
			ha->rsp_ring_index = 0;
			ha->response_ring_ptr = ha->response_ring;
		} else {
			ha->response_ring_ptr++;
		}

		if (pkt->entry_status != 0) {
			DEBUG3(printk(KERN_INFO
			    "scsi(%ld): Process error entry.\n", ha->host_no));

			qla2x00_error_entry(ha, pkt);
			((response_t *)pkt)->signature = RESPONSE_PROCESSED;
			wmb();
			continue;
		}

		switch (pkt->entry_type) {
		case STATUS_TYPE:
			qla2x00_status_entry(ha, pkt);
			break;
		case STATUS_TYPE_21:
			handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
			for (cnt = 0; cnt < handle_cnt; cnt++) {
				qla2x00_process_completed_request(ha,
				    ((sts21_entry_t *)pkt)->handle[cnt]);
			}
			break;
		case STATUS_TYPE_22:
			handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
			for (cnt = 0; cnt < handle_cnt; cnt++) {
				qla2x00_process_completed_request(ha,
				    ((sts22_entry_t *)pkt)->handle[cnt]);
			}
			break;
		case STATUS_CONT_TYPE:
			qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
			break;
		default:
			/* Type Not Supported. */
			DEBUG4(printk(KERN_WARNING
			    "scsi(%ld): Received unknown response pkt type %x "
			    "entry status=%x.\n",
			    ha->host_no, pkt->entry_type, pkt->entry_status));
			break;
		}
		((response_t *)pkt)->signature = RESPONSE_PROCESSED;
		wmb();
	}

	/* Adjust ring index */
	WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
}

static inline void
qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
{
	struct scsi_cmnd *cp = sp->cmd;

	if (sense_len >= SCSI_SENSE_BUFFERSIZE)
		sense_len = SCSI_SENSE_BUFFERSIZE;

	CMD_ACTUAL_SNSLEN(cp) = sense_len;
	sp->request_sense_length = sense_len;
	sp->request_sense_ptr = cp->sense_buffer;
	if (sp->request_sense_length > 32)
		sense_len = 32;

	memcpy(cp->sense_buffer, sense_data, sense_len);

	sp->request_sense_ptr += sense_len;
	sp->request_sense_length -= sense_len;
	if (sp->request_sense_length != 0)
		sp->ha->status_srb = sp;

	DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
	    "cmd=%p pid=%ld\n", __func__, sp->ha->host_no, cp->device->channel,
	    cp->device->id, cp->device->lun, cp, cp->serial_number));
	if (sense_len)
		DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
		    CMD_ACTUAL_SNSLEN(cp)));
}

/**
 * qla2x00_status_entry() - Process a Status IOCB entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
{
	srb_t		*sp;
	fc_port_t	*fcport;
	struct scsi_cmnd *cp;
	sts_entry_t *sts;
	struct sts_entry_24xx *sts24;
	uint16_t	comp_status;
	uint16_t	scsi_status;
	uint8_t		lscsi_status;
	int32_t		resid;
	uint32_t	sense_len, rsp_info_len, resid_len, fw_resid_len;
	uint8_t		*rsp_info, *sense_data;

	sts = (sts_entry_t *) pkt;
	sts24 = (struct sts_entry_24xx *) pkt;
	if (IS_FWI2_CAPABLE(ha)) {
		comp_status = le16_to_cpu(sts24->comp_status);
		scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
	} else {
		comp_status = le16_to_cpu(sts->comp_status);
		scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
	}

	/* Fast path completion. */
	if (comp_status == CS_COMPLETE && scsi_status == 0) {
		qla2x00_process_completed_request(ha, sts->handle);

		return;
	}

	/* Validate handle. */
	if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
		sp = ha->outstanding_cmds[sts->handle];
		ha->outstanding_cmds[sts->handle] = NULL;
	} else
		sp = NULL;

	if (sp == NULL) {
		DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");

		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		qla2xxx_wake_dpc(ha);
		return;
	}
	cp = sp->cmd;
	if (cp == NULL) {
		DEBUG2(printk("scsi(%ld): Command already returned back to OS "
		    "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
		qla_printk(KERN_WARNING, ha,
		    "Command is NULL: already returned to OS (sp=%p)\n", sp);

		return;
	}

  	lscsi_status = scsi_status & STATUS_MASK;
	CMD_ENTRY_STATUS(cp) = sts->entry_status;
	CMD_COMPL_STATUS(cp) = comp_status;
	CMD_SCSI_STATUS(cp) = scsi_status;

	fcport = sp->fcport;

	sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
	if (IS_FWI2_CAPABLE(ha)) {
		sense_len = le32_to_cpu(sts24->sense_len);
		rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
		resid_len = le32_to_cpu(sts24->rsp_residual_count);
		fw_resid_len = le32_to_cpu(sts24->residual_len);
		rsp_info = sts24->data;
		sense_data = sts24->data;
		host_to_fcp_swap(sts24->data, sizeof(sts24->data));
	} else {
		sense_len = le16_to_cpu(sts->req_sense_length);
		rsp_info_len = le16_to_cpu(sts->rsp_info_len);
		resid_len = le32_to_cpu(sts->residual_length);
		rsp_info = sts->rsp_info;
		sense_data = sts->req_sense_data;
	}

	/* Check for any FCP transport errors. */
	if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
		/* Sense data lies beyond any FCP RESPONSE data. */
		if (IS_FWI2_CAPABLE(ha))
			sense_data += rsp_info_len;
		if (rsp_info_len > 3 && rsp_info[3]) {
			DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
			    "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
			    "retrying command\n", ha->host_no,
			    cp->device->channel, cp->device->id,
			    cp->device->lun, rsp_info_len, rsp_info[0],
			    rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
			    rsp_info[5], rsp_info[6], rsp_info[7]));

			cp->result = DID_BUS_BUSY << 16;
			qla2x00_sp_compl(ha, sp);
			return;
		}
	}

	/* Check for overrun. */
	if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
	    scsi_status & SS_RESIDUAL_OVER)
		comp_status = CS_DATA_OVERRUN;

	/*
	 * Based on Host and scsi status generate status code for Linux
	 */
	switch (comp_status) {
	case CS_COMPLETE:
	case CS_QUEUE_FULL:
		if (scsi_status == 0) {
			cp->result = DID_OK << 16;
			break;
		}
		if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
			resid = resid_len;
			scsi_set_resid(cp, resid);
			CMD_RESID_LEN(cp) = resid;

			if (!lscsi_status &&
			    ((unsigned)(scsi_bufflen(cp) - resid) <
			     cp->underflow)) {
				qla_printk(KERN_INFO, ha,
					   "scsi(%ld:%d:%d:%d): Mid-layer underflow "
					   "detected (%x of %x bytes)...returning "
					   "error status.\n", ha->host_no,
					   cp->device->channel, cp->device->id,
					   cp->device->lun, resid,
					   scsi_bufflen(cp));

				cp->result = DID_ERROR << 16;
				break;
			}
		}
		cp->result = DID_OK << 16 | lscsi_status;

		if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld): QUEUE FULL status detected "
			    "0x%x-0x%x.\n", ha->host_no, comp_status,
			    scsi_status));

			/* Adjust queue depth for all luns on the port. */
			fcport->last_queue_full = jiffies;
			starget_for_each_device(cp->device->sdev_target,
			    fcport, qla2x00_adjust_sdev_qdepth_down);
			break;
		}
		if (lscsi_status != SS_CHECK_CONDITION)
			break;

		memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
		if (!(scsi_status & SS_SENSE_LEN_VALID))
			break;

		qla2x00_handle_sense(sp, sense_data, sense_len);
		break;

	case CS_DATA_UNDERRUN:
		resid = resid_len;
		/* Use F/W calculated residual length. */
		if (IS_FWI2_CAPABLE(ha)) {
			if (scsi_status & SS_RESIDUAL_UNDER &&
			    resid != fw_resid_len) {
				scsi_status &= ~SS_RESIDUAL_UNDER;
				lscsi_status = 0;
			}
			resid = fw_resid_len;
		}

		if (scsi_status & SS_RESIDUAL_UNDER) {
			scsi_set_resid(cp, resid);
			CMD_RESID_LEN(cp) = resid;
		} else {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld:%d:%d) UNDERRUN status detected "
			    "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
			    "os_underflow=0x%x\n", ha->host_no,
			    cp->device->id, cp->device->lun, comp_status,
			    scsi_status, resid_len, resid, cp->cmnd[0],
			    cp->underflow));

		}

		/*
		 * Check to see if SCSI Status is non zero. If so report SCSI
		 * Status.
		 */
		if (lscsi_status != 0) {
			cp->result = DID_OK << 16 | lscsi_status;

			if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
				DEBUG2(printk(KERN_INFO
				    "scsi(%ld): QUEUE FULL status detected "
				    "0x%x-0x%x.\n", ha->host_no, comp_status,
				    scsi_status));

				/*
				 * Adjust queue depth for all luns on the
				 * port.
				 */
				fcport->last_queue_full = jiffies;
				starget_for_each_device(
				    cp->device->sdev_target, fcport,
				    qla2x00_adjust_sdev_qdepth_down);
				break;
			}
			if (lscsi_status != SS_CHECK_CONDITION)
				break;

			memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
			if (!(scsi_status & SS_SENSE_LEN_VALID))
				break;

			qla2x00_handle_sense(sp, sense_data, sense_len);
		} else {
			/*
			 * If RISC reports underrun and target does not report
			 * it then we must have a lost frame, so tell upper
			 * layer to retry it by reporting a bus busy.
			 */
			if (!(scsi_status & SS_RESIDUAL_UNDER)) {
				DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
					      "frame(s) detected (%x of %x bytes)..."
					      "retrying command.\n", ha->host_no,
					      cp->device->channel, cp->device->id,
					      cp->device->lun, resid,
					      scsi_bufflen(cp)));

				cp->result = DID_BUS_BUSY << 16;
				break;
			}

			/* Handle mid-layer underflow */
			if ((unsigned)(scsi_bufflen(cp) - resid) <
			    cp->underflow) {
				qla_printk(KERN_INFO, ha,
					   "scsi(%ld:%d:%d:%d): Mid-layer underflow "
					   "detected (%x of %x bytes)...returning "
					   "error status.\n", ha->host_no,
					   cp->device->channel, cp->device->id,
					   cp->device->lun, resid,
					   scsi_bufflen(cp));

				cp->result = DID_ERROR << 16;
				break;
			}

			/* Everybody online, looking good... */
			cp->result = DID_OK << 16;
		}
		break;

	case CS_DATA_OVERRUN:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
		    ha->host_no, cp->device->id, cp->device->lun, comp_status,
		    scsi_status));
		DEBUG2(printk(KERN_INFO
		    "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
		    cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
		    cp->cmnd[4], cp->cmnd[5]));
		DEBUG2(printk(KERN_INFO
		    "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
		    "status!\n",
		    cp->serial_number, scsi_bufflen(cp), resid_len));

		cp->result = DID_ERROR << 16;
		break;

	case CS_PORT_LOGGED_OUT:
	case CS_PORT_CONFIG_CHG:
	case CS_PORT_BUSY:
	case CS_INCOMPLETE:
	case CS_PORT_UNAVAILABLE:
		/*
		 * If the port is in Target Down state, return all IOs for this
		 * Target with DID_NO_CONNECT ELSE Queue the IOs in the
		 * retry_queue.
		 */
		DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
		    "pid=%ld, compl status=0x%x, port state=0x%x\n",
		    ha->host_no, cp->device->id, cp->device->lun,
		    cp->serial_number, comp_status,
		    atomic_read(&fcport->state)));

		cp->result = DID_BUS_BUSY << 16;
		if (atomic_read(&fcport->state) == FCS_ONLINE) {
			qla2x00_mark_device_lost(ha, fcport, 1, 1);
		}
		break;

	case CS_RESET:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
		    ha->host_no, comp_status, scsi_status));

		cp->result = DID_RESET << 16;
		break;

	case CS_ABORTED:
		/*
		 * hv2.19.12 - DID_ABORT does not retry the request if we
		 * aborted this request then abort otherwise it must be a
		 * reset.
		 */
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
		    ha->host_no, comp_status, scsi_status));

		cp->result = DID_RESET << 16;
		break;

	case CS_TIMEOUT:
		cp->result = DID_BUS_BUSY << 16;

		if (IS_FWI2_CAPABLE(ha)) {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
			    "0x%x-0x%x\n", ha->host_no, cp->device->channel,
			    cp->device->id, cp->device->lun, comp_status,
			    scsi_status));
			break;
		}
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
		    "sflags=%x.\n", ha->host_no, cp->device->channel,
		    cp->device->id, cp->device->lun, comp_status, scsi_status,
		    le16_to_cpu(sts->status_flags)));

		/* Check to see if logout occurred. */
		if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
			qla2x00_mark_device_lost(ha, fcport, 1, 1);
		break;

	default:
		DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
		    "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
		qla_printk(KERN_INFO, ha,
		    "Unknown status detected 0x%x-0x%x.\n",
		    comp_status, scsi_status);

		cp->result = DID_ERROR << 16;
		break;
	}

	/* Place command on done queue. */
	if (ha->status_srb == NULL)
		qla2x00_sp_compl(ha, sp);
}

/**
 * qla2x00_status_cont_entry() - Process a Status Continuations entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 *
 * Extended sense data.
 */
static void
qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
{
	uint8_t		sense_sz = 0;
	srb_t		*sp = ha->status_srb;
	struct scsi_cmnd *cp;

	if (sp != NULL && sp->request_sense_length != 0) {
		cp = sp->cmd;
		if (cp == NULL) {
			DEBUG2(printk("%s(): Cmd already returned back to OS "
			    "sp=%p.\n", __func__, sp));
			qla_printk(KERN_INFO, ha,
			    "cmd is NULL: already returned to OS (sp=%p)\n",
			    sp);

			ha->status_srb = NULL;
			return;
		}

		if (sp->request_sense_length > sizeof(pkt->data)) {
			sense_sz = sizeof(pkt->data);
		} else {
			sense_sz = sp->request_sense_length;
		}

		/* Move sense data. */
		if (IS_FWI2_CAPABLE(ha))
			host_to_fcp_swap(pkt->data, sizeof(pkt->data));
		memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
		DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));

		sp->request_sense_ptr += sense_sz;
		sp->request_sense_length -= sense_sz;

		/* Place command on done queue. */
		if (sp->request_sense_length == 0) {
			ha->status_srb = NULL;
			qla2x00_sp_compl(ha, sp);
		}
	}
}

/**
 * qla2x00_error_entry() - Process an error entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
{
	srb_t *sp;

#if defined(QL_DEBUG_LEVEL_2)
	if (pkt->entry_status & RF_INV_E_ORDER)
		qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
	else if (pkt->entry_status & RF_INV_E_COUNT)
		qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
	else if (pkt->entry_status & RF_INV_E_PARAM)
		qla_printk(KERN_ERR, ha,
		    "%s: Invalid Entry Parameter\n", __func__);
	else if (pkt->entry_status & RF_INV_E_TYPE)
		qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
	else if (pkt->entry_status & RF_BUSY)
		qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
	else
		qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
#endif

	/* Validate handle. */
	if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
		sp = ha->outstanding_cmds[pkt->handle];
	else
		sp = NULL;

	if (sp) {
		/* Free outstanding command slot. */
		ha->outstanding_cmds[pkt->handle] = NULL;

		/* Bad payload or header */
		if (pkt->entry_status &
		    (RF_INV_E_ORDER | RF_INV_E_COUNT |
		     RF_INV_E_PARAM | RF_INV_E_TYPE)) {
			sp->cmd->result = DID_ERROR << 16;
		} else if (pkt->entry_status & RF_BUSY) {
			sp->cmd->result = DID_BUS_BUSY << 16;
		} else {
			sp->cmd->result = DID_ERROR << 16;
		}
		qla2x00_sp_compl(ha, sp);

	} else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
	    COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
		DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha,
		    "Error entry - invalid handle\n");

		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		qla2xxx_wake_dpc(ha);
	}
}

/**
 * qla24xx_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

	/* Load return mailbox registers. */
	ha->flags.mbox_int = 1;
	ha->mailbox_out[0] = mb0;
	wptr = (uint16_t __iomem *)&reg->mailbox1;

	for (cnt = 1; cnt < ha->mbx_count; cnt++) {
		ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
		wptr++;
	}

	if (ha->mcp) {
		DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
		    __func__, ha->host_no, ha->mcp->mb[0]));
	} else {
		DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
		    __func__, ha->host_no));
	}
}

/**
 * qla24xx_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void
qla24xx_process_response_queue(struct scsi_qla_host *ha)
{
	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
	struct sts_entry_24xx *pkt;

	if (!ha->flags.online)
		return;

	while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
		pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;

		ha->rsp_ring_index++;
		if (ha->rsp_ring_index == ha->response_q_length) {
			ha->rsp_ring_index = 0;
			ha->response_ring_ptr = ha->response_ring;
		} else {
			ha->response_ring_ptr++;
		}

		if (pkt->entry_status != 0) {
			DEBUG3(printk(KERN_INFO
			    "scsi(%ld): Process error entry.\n", ha->host_no));

			qla2x00_error_entry(ha, (sts_entry_t *) pkt);
			((response_t *)pkt)->signature = RESPONSE_PROCESSED;
			wmb();
			continue;
		}

		switch (pkt->entry_type) {
		case STATUS_TYPE:
			qla2x00_status_entry(ha, pkt);
			break;
		case STATUS_CONT_TYPE:
			qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
			break;
		case VP_RPT_ID_IOCB_TYPE:
			qla24xx_report_id_acquisition(ha,
			    (struct vp_rpt_id_entry_24xx *)pkt);
			break;
		default:
			/* Type Not Supported. */
			DEBUG4(printk(KERN_WARNING
			    "scsi(%ld): Received unknown response pkt type %x "
			    "entry status=%x.\n",
			    ha->host_no, pkt->entry_type, pkt->entry_status));
			break;
		}
		((response_t *)pkt)->signature = RESPONSE_PROCESSED;
		wmb();
	}

	/* Adjust ring index */
	WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
}

static void
qla2xxx_check_risc_status(scsi_qla_host_t *ha)
{
	int rval;
	uint32_t cnt;
	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

	if (!IS_QLA25XX(ha))
		return;

	rval = QLA_SUCCESS;
	WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
	RD_REG_DWORD(&reg->iobase_addr);
	WRT_REG_DWORD(&reg->iobase_window, 0x0001);
	for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
	    rval == QLA_SUCCESS; cnt--) {
		if (cnt) {
			WRT_REG_DWORD(&reg->iobase_window, 0x0001);
			udelay(10);
		} else
			rval = QLA_FUNCTION_TIMEOUT;
	}
	if (rval == QLA_SUCCESS)
		goto next_test;

	WRT_REG_DWORD(&reg->iobase_window, 0x0003);
	for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
	    rval == QLA_SUCCESS; cnt--) {
		if (cnt) {
			WRT_REG_DWORD(&reg->iobase_window, 0x0003);
			udelay(10);
		} else
			rval = QLA_FUNCTION_TIMEOUT;
	}
	if (rval != QLA_SUCCESS)
		goto done;

next_test:
	if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
		qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");

done:
	WRT_REG_DWORD(&reg->iobase_window, 0x0000);
	RD_REG_DWORD(&reg->iobase_window);
}

/**
 * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla24xx_intr_handler(int irq, void *dev_id)
{
	scsi_qla_host_t	*ha;
	struct device_reg_24xx __iomem *reg;
	int		status;
	unsigned long	iter;
	uint32_t	stat;
	uint32_t	hccr;
	uint16_t	mb[4];

	ha = (scsi_qla_host_t *) dev_id;
	if (!ha) {
		printk(KERN_INFO
		    "%s(): NULL host pointer\n", __func__);
		return IRQ_NONE;
	}

	reg = &ha->iobase->isp24;
	status = 0;

	spin_lock(&ha->hardware_lock);
	for (iter = 50; iter--; ) {
		stat = RD_REG_DWORD(&reg->host_status);
		if (stat & HSRX_RISC_PAUSED) {
			if (pci_channel_offline(ha->pdev))
				break;

			if (ha->hw_event_pause_errors == 0)
				qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
				    0, MSW(stat), LSW(stat));
			else if (ha->hw_event_pause_errors < 0xffffffff)
				ha->hw_event_pause_errors++;

			hccr = RD_REG_DWORD(&reg->hccr);

			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
			    "Dumping firmware!\n", hccr);

			qla2xxx_check_risc_status(ha);

			ha->isp_ops->fw_dump(ha, 1);
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((stat & HSRX_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
			qla24xx_mbx_completion(ha, MSW(stat));
			status |= MBX_INTERRUPT;

			break;
		case 0x12:
			mb[0] = MSW(stat);
			mb[1] = RD_REG_WORD(&reg->mailbox1);
			mb[2] = RD_REG_WORD(&reg->mailbox2);
			mb[3] = RD_REG_WORD(&reg->mailbox3);
			qla2x00_async_event(ha, mb);
			break;
		case 0x13:
			qla24xx_process_response_queue(ha);
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
			    ha->host_no, stat & 0xff));
			break;
		}
		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
		RD_REG_DWORD_RELAXED(&reg->hccr);
	}
	spin_unlock(&ha->hardware_lock);

	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		complete(&ha->mbx_intr_comp);
	}

	return IRQ_HANDLED;
}

static irqreturn_t
qla24xx_msix_rsp_q(int irq, void *dev_id)
{
	scsi_qla_host_t	*ha;
	struct device_reg_24xx __iomem *reg;

	ha = dev_id;
	reg = &ha->iobase->isp24;

	spin_lock_irq(&ha->hardware_lock);

	qla24xx_process_response_queue(ha);
	WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);

	spin_unlock_irq(&ha->hardware_lock);

	return IRQ_HANDLED;
}

static irqreturn_t
qla24xx_msix_default(int irq, void *dev_id)
{
	scsi_qla_host_t	*ha;
	struct device_reg_24xx __iomem *reg;
	int		status;
	uint32_t	stat;
	uint32_t	hccr;
	uint16_t	mb[4];

	ha = dev_id;
	reg = &ha->iobase->isp24;
	status = 0;

	spin_lock_irq(&ha->hardware_lock);
	do {
		stat = RD_REG_DWORD(&reg->host_status);
		if (stat & HSRX_RISC_PAUSED) {
			if (pci_channel_offline(ha->pdev))
				break;

			if (ha->hw_event_pause_errors == 0)
				qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
				    0, MSW(stat), LSW(stat));
			else if (ha->hw_event_pause_errors < 0xffffffff)
				ha->hw_event_pause_errors++;

			hccr = RD_REG_DWORD(&reg->hccr);

			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
			    "Dumping firmware!\n", hccr);

			qla2xxx_check_risc_status(ha);

			ha->isp_ops->fw_dump(ha, 1);
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((stat & HSRX_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
			qla24xx_mbx_completion(ha, MSW(stat));
			status |= MBX_INTERRUPT;

			break;
		case 0x12:
			mb[0] = MSW(stat);
			mb[1] = RD_REG_WORD(&reg->mailbox1);
			mb[2] = RD_REG_WORD(&reg->mailbox2);
			mb[3] = RD_REG_WORD(&reg->mailbox3);
			qla2x00_async_event(ha, mb);
			break;
		case 0x13:
			qla24xx_process_response_queue(ha);
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
			    ha->host_no, stat & 0xff));
			break;
		}
		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
	} while (0);
	spin_unlock_irq(&ha->hardware_lock);

	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		complete(&ha->mbx_intr_comp);
	}

	return IRQ_HANDLED;
}

/* Interrupt handling helpers. */

struct qla_init_msix_entry {
	uint16_t entry;
	uint16_t index;
	const char *name;
	irq_handler_t handler;
};

static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
	{ QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
		"qla2xxx (default)", qla24xx_msix_default },

	{ QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
		"qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
};

static void
qla24xx_disable_msix(scsi_qla_host_t *ha)
{
	int i;
	struct qla_msix_entry *qentry;

	for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
		qentry = &ha->msix_entries[imsix_entries[i].index];
		if (qentry->have_irq)
			free_irq(qentry->msix_vector, ha);
	}
	pci_disable_msix(ha->pdev);
}

static int
qla24xx_enable_msix(scsi_qla_host_t *ha)
{
	int i, ret;
	struct msix_entry entries[QLA_MSIX_ENTRIES];
	struct qla_msix_entry *qentry;

	for (i = 0; i < QLA_MSIX_ENTRIES; i++)
		entries[i].entry = imsix_entries[i].entry;

	ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
	if (ret) {
		qla_printk(KERN_WARNING, ha,
		    "MSI-X: Failed to enable support -- %d/%d\n",
		    QLA_MSIX_ENTRIES, ret);
		goto msix_out;
	}
	ha->flags.msix_enabled = 1;

	for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
		qentry = &ha->msix_entries[imsix_entries[i].index];
		qentry->msix_vector = entries[i].vector;
		qentry->msix_entry = entries[i].entry;
		qentry->have_irq = 0;
		ret = request_irq(qentry->msix_vector,
		    imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
		if (ret) {
			qla_printk(KERN_WARNING, ha,
			    "MSI-X: Unable to register handler -- %x/%d.\n",
			    imsix_entries[i].index, ret);
			qla24xx_disable_msix(ha);
			goto msix_out;
		}
		qentry->have_irq = 1;
	}

msix_out:
	return ret;
}

int
qla2x00_request_irqs(scsi_qla_host_t *ha)
{
	int ret;
	device_reg_t __iomem *reg = ha->iobase;

	/* If possible, enable MSI-X. */
	if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
		goto skip_msix;

        if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
	    !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
		DEBUG2(qla_printk(KERN_WARNING, ha,
		    "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
		    ha->chip_revision, ha->fw_attributes));

		goto skip_msix;
	}

	if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
	    (ha->pdev->subsystem_device == 0x7040 ||
		ha->pdev->subsystem_device == 0x7041 ||
		ha->pdev->subsystem_device == 0x1705)) {
		DEBUG2(qla_printk(KERN_WARNING, ha,
		    "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
		    ha->pdev->subsystem_vendor,
		    ha->pdev->subsystem_device));

		goto skip_msi;
	}

	ret = qla24xx_enable_msix(ha);
	if (!ret) {
		DEBUG2(qla_printk(KERN_INFO, ha,
		    "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
		    ha->fw_attributes));
		goto clear_risc_ints;
	}
	qla_printk(KERN_WARNING, ha,
	    "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
skip_msix:

	if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
		goto skip_msi;

	ret = pci_enable_msi(ha->pdev);
	if (!ret) {
		DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
		ha->flags.msi_enabled = 1;
	}
skip_msi:

	ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
	    IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
	if (ret) {
		qla_printk(KERN_WARNING, ha,
		    "Failed to reserve interrupt %d already in use.\n",
		    ha->pdev->irq);
		goto fail;
	}
	ha->flags.inta_enabled = 1;
	ha->host->irq = ha->pdev->irq;
clear_risc_ints:

	ha->isp_ops->disable_intrs(ha);
	spin_lock_irq(&ha->hardware_lock);
	if (IS_FWI2_CAPABLE(ha)) {
		WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
		WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
	} else {
		WRT_REG_WORD(&reg->isp.semaphore, 0);
		WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
		WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
	}
	spin_unlock_irq(&ha->hardware_lock);
	ha->isp_ops->enable_intrs(ha);

fail:
	return ret;
}

void
qla2x00_free_irqs(scsi_qla_host_t *ha)
{

	if (ha->flags.msix_enabled)
		qla24xx_disable_msix(ha);
	else if (ha->flags.inta_enabled) {
		free_irq(ha->host->irq, ha);
		pci_disable_msi(ha->pdev);
	}
}

Privacy Policy