summaryrefslogtreecommitdiffstats
path: root/drivers/ata/ahci.c
blob: bca3d64d47e08f777b3c732551bf3445fc085027 (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
/*
 *  ahci.c - AHCI SATA support
 *
 *  Maintained by:  Tejun Heo <tj@kernel.org>
 *    		    Please ALWAYS copy linux-ide@vger.kernel.org
 *		    on emails.
 *
 *  Copyright 2004-2005 Red Hat, Inc.
 *
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * libata documentation is available via 'make {ps|pdf}docs',
 * as Documentation/DocBook/libata.*
 *
 * AHCI hardware documentation:
 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/gfp.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include "ahci.h"

#define DRV_NAME	"ahci"
#define DRV_VERSION	"3.0"

enum {
	AHCI_PCI_BAR_STA2X11	= 0,
	AHCI_PCI_BAR_ENMOTUS	= 2,
	AHCI_PCI_BAR_STANDARD	= 5,
};

enum board_ids {
	/* board IDs by feature in alphabetical order */
	board_ahci,
	board_ahci_ign_iferr,
	board_ahci_noncq,
	board_ahci_nosntf,
	board_ahci_yes_fbs,

	/* board IDs for specific chipsets in alphabetical order */
	board_ahci_mcp65,
	board_ahci_mcp77,
	board_ahci_mcp89,
	board_ahci_mv,
	board_ahci_sb600,
	board_ahci_sb700,	/* for SB700 and SB800 */
	board_ahci_vt8251,

	/* aliases */
	board_ahci_mcp_linux	= board_ahci_mcp65,
	board_ahci_mcp67	= board_ahci_mcp65,
	board_ahci_mcp73	= board_ahci_mcp65,
	board_ahci_mcp79	= board_ahci_mcp77,
};

static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
				 unsigned long deadline);
static void ahci_mcp89_apple_enable(struct pci_dev *pdev);
static bool is_mcp89_apple(struct pci_dev *pdev);
static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline);
#ifdef CONFIG_PM
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int ahci_pci_device_resume(struct pci_dev *pdev);
#endif

static struct scsi_host_template ahci_sht = {
	AHCI_SHT("ahci"),
};

static struct ata_port_operations ahci_vt8251_ops = {
	.inherits		= &ahci_ops,
	.hardreset		= ahci_vt8251_hardreset,
};

static struct ata_port_operations ahci_p5wdh_ops = {
	.inherits		= &ahci_ops,
	.hardreset		= ahci_p5wdh_hardreset,
};

static const struct ata_port_info ahci_port_info[] = {
	/* by features */
	[board_ahci] = {
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_ign_iferr] = {
		AHCI_HFLAGS	(AHCI_HFLAG_IGN_IRQ_IF_ERR),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_noncq] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_nosntf] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_SNTF),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_yes_fbs] = {
		AHCI_HFLAGS	(AHCI_HFLAG_YES_FBS),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	/* by chipsets */
	[board_ahci_mcp65] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_FPDMA_AA | AHCI_HFLAG_NO_PMP |
				 AHCI_HFLAG_YES_NCQ),
		.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NO_DIPM,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_mcp77] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_FPDMA_AA | AHCI_HFLAG_NO_PMP),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_mcp89] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_FPDMA_AA),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_mv] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI |
				 AHCI_HFLAG_MV_PATA | AHCI_HFLAG_NO_PMP),
		.flags		= ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[board_ahci_sb600] = {
		AHCI_HFLAGS	(AHCI_HFLAG_IGN_SERR_INTERNAL |
				 AHCI_HFLAG_NO_MSI | AHCI_HFLAG_SECT255 |
				 AHCI_HFLAG_32BIT_ONLY),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_pmp_retry_srst_ops,
	},
	[board_ahci_sb700] = {	/* for SB700 and SB800 */
		AHCI_HFLAGS	(AHCI_HFLAG_IGN_SERR_INTERNAL),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_pmp_retry_srst_ops,
	},
	[board_ahci_vt8251] = {
		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_PMP),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_vt8251_ops,
	},
};

static const struct pci_device_id ahci_pci_tbl[] = {
	/* Intel */
	{ PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
	{ PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
	{ PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
	{ PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
	{ PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
	{ PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
	{ PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
	{ PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
	{ PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
	{ PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
	{ PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
	{ PCI_VDEVICE(INTEL, 0x2822), board_ahci_nosntf }, /* ICH8 */
	{ PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
	{ PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
	{ PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
	{ PCI_VDEVICE(INTEL, 0x2922), board_ahci }, /* ICH9 */
	{ PCI_VDEVICE(INTEL, 0x2923), board_ahci }, /* ICH9 */
	{ PCI_VDEVICE(INTEL, 0x2924), board_ahci }, /* ICH9 */
	{ PCI_VDEVICE(INTEL, 0x2925), board_ahci }, /* ICH9 */
	{ PCI_VDEVICE(INTEL, 0x2927), board_ahci }, /* ICH9 */
	{ PCI_VDEVICE(INTEL, 0x2929), board_ahci }, /* ICH9M */
	{ PCI_VDEVICE(INTEL, 0x292a), board_ahci }, /* ICH9M */
	{ PCI_VDEVICE(INTEL, 0x292b), board_ahci }, /* ICH9M */
	{ PCI_VDEVICE(INTEL, 0x292c), board_ahci }, /* ICH9M */
	{ PCI_VDEVICE(INTEL, 0x292f), board_ahci }, /* ICH9M */
	{ PCI_VDEVICE(INTEL, 0x294d), board_ahci }, /* ICH9 */
	{ PCI_VDEVICE(INTEL, 0x294e), board_ahci }, /* ICH9M */
	{ PCI_VDEVICE(INTEL, 0x502a), board_ahci }, /* Tolapai */
	{ PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
	{ PCI_VDEVICE(INTEL, 0x3a05), board_ahci }, /* ICH10 */
	{ PCI_VDEVICE(INTEL, 0x3a22), board_ahci }, /* ICH10 */
	{ PCI_VDEVICE(INTEL, 0x3a25), board_ahci }, /* ICH10 */
	{ PCI_VDEVICE(INTEL, 0x3b22), board_ahci }, /* PCH AHCI */
	{ PCI_VDEVICE(INTEL, 0x3b23), board_ahci }, /* PCH AHCI */
	{ PCI_VDEVICE(INTEL, 0x3b24), board_ahci }, /* PCH RAID */
	{ PCI_VDEVICE(INTEL, 0x3b25), board_ahci }, /* PCH RAID */
	{ PCI_VDEVICE(INTEL, 0x3b29), board_ahci }, /* PCH AHCI */
	{ PCI_VDEVICE(INTEL, 0x3b2b), board_ahci }, /* PCH RAID */
	{ PCI_VDEVICE(INTEL, 0x3b2c), board_ahci }, /* PCH RAID */
	{ PCI_VDEVICE(INTEL, 0x3b2f), board_ahci }, /* PCH AHCI */
	{ PCI_VDEVICE(INTEL, 0x1c02), board_ahci }, /* CPT AHCI */
	{ PCI_VDEVICE(INTEL, 0x1c03), board_ahci }, /* CPT AHCI */
	{ PCI_VDEVICE(INTEL, 0x1c04), board_ahci }, /* CPT RAID */
	{ PCI_VDEVICE(INTEL, 0x1c05), board_ahci }, /* CPT RAID */
	{ PCI_VDEVICE(INTEL, 0x1c06), board_ahci }, /* CPT RAID */
	{ PCI_VDEVICE(INTEL, 0x1c07), board_ahci }, /* CPT RAID */
	{ PCI_VDEVICE(INTEL, 0x1d02), board_ahci }, /* PBG AHCI */
	{ PCI_VDEVICE(INTEL, 0x1d04), board_ahci }, /* PBG RAID */
	{ PCI_VDEVICE(INTEL, 0x1d06), board_ahci }, /* PBG RAID */
	{ PCI_VDEVICE(INTEL, 0x2826), board_ahci }, /* PBG RAID */
	{ PCI_VDEVICE(INTEL, 0x2323), board_ahci }, /* DH89xxCC AHCI */
	{ PCI_VDEVICE(INTEL, 0x1e02), board_ahci }, /* Panther Point AHCI */
	{ PCI_VDEVICE(INTEL, 0x1e03), board_ahci }, /* Panther Point AHCI */
	{ PCI_VDEVICE(INTEL, 0x1e04), board_ahci }, /* Panther Point RAID */
	{ PCI_VDEVICE(INTEL, 0x1e05), board_ahci }, /* Panther Point RAID */
	{ PCI_VDEVICE(INTEL, 0x1e06), board_ahci }, /* Panther Point RAID */
	{ PCI_VDEVICE(INTEL, 0x1e07), board_ahci }, /* Panther Point RAID */
	{ PCI_VDEVICE(INTEL, 0x1e0e), board_ahci }, /* Panther Point RAID */
	{ PCI_VDEVICE(INTEL, 0x8c02), board_ahci }, /* Lynx Point AHCI */
	{ PCI_VDEVICE(INTEL, 0x8c03), board_ahci }, /* Lynx Point AHCI */
	{ PCI_VDEVICE(INTEL, 0x8c04), board_ahci }, /* Lynx Point RAID */
	{ PCI_VDEVICE(INTEL, 0x8c05), board_ahci }, /* Lynx Point RAID */
	{ PCI_VDEVICE(INTEL, 0x8c06), board_ahci }, /* Lynx Point RAID */
	{ PCI_VDEVICE(INTEL, 0x8c07), board_ahci }, /* Lynx Point RAID */
	{ PCI_VDEVICE(INTEL, 0x8c0e), board_ahci }, /* Lynx Point RAID */
	{ PCI_VDEVICE(INTEL, 0x8c0f), board_ahci }, /* Lynx Point RAID */
	{ PCI_VDEVICE(INTEL, 0x9c02), board_ahci }, /* Lynx Point-LP AHCI */
	{ PCI_VDEVICE(INTEL, 0x9c03), board_ahci }, /* Lynx Point-LP AHCI */
	{ PCI_VDEVICE(INTEL, 0x9c04), board_ahci }, /* Lynx Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c05), board_ahci }, /* Lynx Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c06), board_ahci }, /* Lynx Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c07), board_ahci }, /* Lynx Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c0e), board_ahci }, /* Lynx Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c0f), board_ahci }, /* Lynx Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x1f22), board_ahci }, /* Avoton AHCI */
	{ PCI_VDEVICE(INTEL, 0x1f23), board_ahci }, /* Avoton AHCI */
	{ PCI_VDEVICE(INTEL, 0x1f24), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f25), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f26), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f27), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f2e), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f2f), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f32), board_ahci }, /* Avoton AHCI */
	{ PCI_VDEVICE(INTEL, 0x1f33), board_ahci }, /* Avoton AHCI */
	{ PCI_VDEVICE(INTEL, 0x1f34), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f35), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f36), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f37), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f3e), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x1f3f), board_ahci }, /* Avoton RAID */
	{ PCI_VDEVICE(INTEL, 0x2823), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x2827), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x8d02), board_ahci }, /* Wellsburg AHCI */
	{ PCI_VDEVICE(INTEL, 0x8d04), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x8d06), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x8d0e), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x8d62), board_ahci }, /* Wellsburg AHCI */
	{ PCI_VDEVICE(INTEL, 0x8d64), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x8d66), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x8d6e), board_ahci }, /* Wellsburg RAID */
	{ PCI_VDEVICE(INTEL, 0x23a3), board_ahci }, /* Coleto Creek AHCI */
	{ PCI_VDEVICE(INTEL, 0x9c83), board_ahci }, /* Wildcat Point-LP AHCI */
	{ PCI_VDEVICE(INTEL, 0x9c85), board_ahci }, /* Wildcat Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c87), board_ahci }, /* Wildcat Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x9c8f), board_ahci }, /* Wildcat Point-LP RAID */
	{ PCI_VDEVICE(INTEL, 0x8c82), board_ahci }, /* 9 Series AHCI */
	{ PCI_VDEVICE(INTEL, 0x8c83), board_ahci }, /* 9 Series AHCI */
	{ PCI_VDEVICE(INTEL, 0x8c84), board_ahci }, /* 9 Series RAID */
	{ PCI_VDEVICE(INTEL, 0x8c85), board_ahci }, /* 9 Series RAID */
	{ PCI_VDEVICE(INTEL, 0x8c86), board_ahci }, /* 9 Series RAID */
	{ PCI_VDEVICE(INTEL, 0x8c87), board_ahci }, /* 9 Series RAID */
	{ PCI_VDEVICE(INTEL, 0x8c8e), board_ahci }, /* 9 Series RAID */
	{ PCI_VDEVICE(INTEL, 0x8c8f), board_ahci }, /* 9 Series RAID */

	/* JMicron 360/1/3/5/6, match class to avoid IDE function */
	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
	  PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
	/* JMicron 362B and 362C have an AHCI function with IDE class code */
	{ PCI_VDEVICE(JMICRON, 0x2362), board_ahci_ign_iferr },
	{ PCI_VDEVICE(JMICRON, 0x236f), board_ahci_ign_iferr },

	/* ATI */
	{ PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb700 }, /* ATI SB700/800 */
	{ PCI_VDEVICE(ATI, 0x4391), board_ahci_sb700 }, /* ATI SB700/800 */
	{ PCI_VDEVICE(ATI, 0x4392), board_ahci_sb700 }, /* ATI SB700/800 */
	{ PCI_VDEVICE(ATI, 0x4393), board_ahci_sb700 }, /* ATI SB700/800 */
	{ PCI_VDEVICE(ATI, 0x4394), board_ahci_sb700 }, /* ATI SB700/800 */
	{ PCI_VDEVICE(ATI, 0x4395), board_ahci_sb700 }, /* ATI SB700/800 */

	/* AMD */
	{ PCI_VDEVICE(AMD, 0x7800), board_ahci }, /* AMD Hudson-2 */
	{ PCI_VDEVICE(AMD, 0x7900), board_ahci }, /* AMD CZ */
	/* AMD is using RAID class only for ahci controllers */
	{ PCI_VENDOR_ID_AMD, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
	  PCI_CLASS_STORAGE_RAID << 8, 0xffffff, board_ahci },

	/* VIA */
	{ PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
	{ PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */

	/* NVIDIA */
	{ PCI_VDEVICE(NVIDIA, 0x044c), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x044d), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x044e), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x044f), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x045c), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x045d), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x045e), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x045f), board_ahci_mcp65 },	/* MCP65 */
	{ PCI_VDEVICE(NVIDIA, 0x0550), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0551), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0552), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0553), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0554), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0555), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0556), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0557), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0558), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0559), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x055a), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x055b), board_ahci_mcp67 },	/* MCP67 */
	{ PCI_VDEVICE(NVIDIA, 0x0580), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0581), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0582), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0583), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0584), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0585), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0586), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0587), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0588), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x0589), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x058a), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x058b), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x058c), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x058d), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x058e), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x058f), board_ahci_mcp_linux },	/* Linux ID */
	{ PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci_mcp73 },	/* MCP73 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci_mcp77 },	/* MCP77 */
	{ PCI_VDEVICE(NVIDIA, 0x0ab4), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0ab5), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0ab6), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0ab7), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0ab8), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0ab9), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0aba), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0abb), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0abc), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0abd), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0abe), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0abf), board_ahci_mcp79 },	/* MCP79 */
	{ PCI_VDEVICE(NVIDIA, 0x0d84), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d85), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d86), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d87), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d88), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d89), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d8a), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d8b), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d8c), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d8d), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d8e), board_ahci_mcp89 },	/* MCP89 */
	{ PCI_VDEVICE(NVIDIA, 0x0d8f), board_ahci_mcp89 },	/* MCP89 */

	/* SiS */
	{ PCI_VDEVICE(SI, 0x1184), board_ahci },		/* SiS 966 */
	{ PCI_VDEVICE(SI, 0x1185), board_ahci },		/* SiS 968 */
	{ PCI_VDEVICE(SI, 0x0186), board_ahci },		/* SiS 968 */

	/* ST Microelectronics */
	{ PCI_VDEVICE(STMICRO, 0xCC06), board_ahci },		/* ST ConneXt */

	/* Marvell */
	{ PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv },	/* 6145 */
	{ PCI_VDEVICE(MARVELL, 0x6121), board_ahci_mv },	/* 6121 */
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9123),
	  .class = PCI_CLASS_STORAGE_SATA_AHCI,
	  .class_mask = 0xffffff,
	  .driver_data = board_ahci_yes_fbs },			/* 88se9128 */
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9125),
	  .driver_data = board_ahci_yes_fbs },			/* 88se9125 */
	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_MARVELL_EXT, 0x9178,
			 PCI_VENDOR_ID_MARVELL_EXT, 0x9170),
	  .driver_data = board_ahci_yes_fbs },			/* 88se9170 */
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x917a),
	  .driver_data = board_ahci_yes_fbs },			/* 88se9172 */
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9172),
	  .driver_data = board_ahci_yes_fbs },			/* 88se9172 */
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9192),
	  .driver_data = board_ahci_yes_fbs },			/* 88se9172 on some Gigabyte */
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x91a0),
	  .driver_data = board_ahci_yes_fbs },
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x91a3),
	  .driver_data = board_ahci_yes_fbs },
	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9230),
	  .driver_data = board_ahci_yes_fbs },
	{ PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0642),
	  .driver_data = board_ahci_yes_fbs },

	/* Promise */
	{ PCI_VDEVICE(PROMISE, 0x3f20), board_ahci },	/* PDC42819 */
	{ PCI_VDEVICE(PROMISE, 0x3781), board_ahci },   /* FastTrak TX8660 ahci-mode */

	/* Asmedia */
	{ PCI_VDEVICE(ASMEDIA, 0x0601), board_ahci },	/* ASM1060 */
	{ PCI_VDEVICE(ASMEDIA, 0x0602), board_ahci },	/* ASM1060 */
	{ PCI_VDEVICE(ASMEDIA, 0x0611), board_ahci },	/* ASM1061 */
	{ PCI_VDEVICE(ASMEDIA, 0x0612), board_ahci },	/* ASM1062 */

	/*
	 * Samsung SSDs found on some macbooks.  NCQ times out.
	 * https://bugzilla.kernel.org/show_bug.cgi?id=60731
	 */
	{ PCI_VDEVICE(SAMSUNG, 0x1600), board_ahci_noncq },

	/* Enmotus */
	{ PCI_DEVICE(0x1c44, 0x8000), board_ahci },

	/* Generic, PCI class code for AHCI */
	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
	  PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },

	{ }	/* terminate list */
};


static struct pci_driver ahci_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= ahci_pci_tbl,
	.probe			= ahci_init_one,
	.remove			= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend		= ahci_pci_device_suspend,
	.resume			= ahci_pci_device_resume,
#endif
};

#if defined(CONFIG_PATA_MARVELL) || defined(CONFIG_PATA_MARVELL_MODULE)
static int marvell_enable;
#else
static int marvell_enable = 1;
#endif
module_param(marvell_enable, int, 0644);
MODULE_PARM_DESC(marvell_enable, "Marvell SATA via AHCI (1 = enabled)");


static void ahci_pci_save_initial_config(struct pci_dev *pdev,
					 struct ahci_host_priv *hpriv)
{
	unsigned int force_port_map = 0;
	unsigned int mask_port_map = 0;

	if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361) {
		dev_info(&pdev->dev, "JMB361 has only one port\n");
		force_port_map = 1;
	}

	/*
	 * Temporary Marvell 6145 hack: PATA port presence
	 * is asserted through the standard AHCI port
	 * presence register, as bit 4 (counting from 0)
	 */
	if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
		if (pdev->device == 0x6121)
			mask_port_map = 0x3;
		else
			mask_port_map = 0xf;
		dev_info(&pdev->dev,
			  "Disabling your PATA port. Use the boot option 'ahci.marvell_enable=0' to avoid this.\n");
	}

	ahci_save_initial_config(&pdev->dev, hpriv);
}

static int ahci_pci_reset_controller(struct ata_host *host)
{
	struct pci_dev *pdev = to_pci_dev(host->dev);

	ahci_reset_controller(host);

	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
		struct ahci_host_priv *hpriv = host->private_data;
		u16 tmp16;

		/* configure PCS */
		pci_read_config_word(pdev, 0x92, &tmp16);
		if ((tmp16 & hpriv->port_map) != hpriv->port_map) {
			tmp16 |= hpriv->port_map;
			pci_write_config_word(pdev, 0x92, tmp16);
		}
	}

	return 0;
}

static void ahci_pci_init_controller(struct ata_host *host)
{
	struct ahci_host_priv *hpriv = host->private_data;
	struct pci_dev *pdev = to_pci_dev(host->dev);
	void __iomem *port_mmio;
	u32 tmp;
	int mv;

	if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
		if (pdev->device == 0x6121)
			mv = 2;
		else
			mv = 4;
		port_mmio = __ahci_port_base(host, mv);

		writel(0, port_mmio + PORT_IRQ_MASK);

		/* clear port IRQ */
		tmp = readl(port_mmio + PORT_IRQ_STAT);
		VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
		if (tmp)
			writel(tmp, port_mmio + PORT_IRQ_STAT);
	}

	ahci_init_controller(host);
}

static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
				 unsigned long deadline)
{
	struct ata_port *ap = link->ap;
	struct ahci_host_priv *hpriv = ap->host->private_data;
	bool online;
	int rc;

	DPRINTK("ENTER\n");

	ahci_stop_engine(ap);

	rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
				 deadline, &online, NULL);

	hpriv->start_engine(ap);

	DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);

	/* vt8251 doesn't clear BSY on signature FIS reception,
	 * request follow-up softreset.
	 */
	return online ? -EAGAIN : rc;
}

static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline)
{
	struct ata_port *ap = link->ap;
	struct ahci_port_priv *pp = ap->private_data;
	struct ahci_host_priv *hpriv = ap->host->private_data;
	u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
	struct ata_taskfile tf;
	bool online;
	int rc;

	ahci_stop_engine(ap);

	/* clear D2H reception area to properly wait for D2H FIS */
	ata_tf_init(link->device, &tf);
	tf.command = ATA_BUSY;
	ata_tf_to_fis(&tf, 0, 0, d2h_fis);

	rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
				 deadline, &online, NULL);

	hpriv->start_engine(ap);

	/* The pseudo configuration device on SIMG4726 attached to
	 * ASUS P5W-DH Deluxe doesn't send signature FIS after
	 * hardreset if no device is attached to the first downstream
	 * port && the pseudo device locks up on SRST w/ PMP==0.  To
	 * work around this, wait for !BSY only briefly.  If BSY isn't
	 * cleared, perform CLO and proceed to IDENTIFY (achieved by
	 * ATA_LFLAG_NO_SRST and ATA_LFLAG_ASSUME_ATA).
	 *
	 * Wait for two seconds.  Devices attached to downstream port
	 * which can't process the following IDENTIFY after this will
	 * have to be reset again.  For most cases, this should
	 * suffice while making probing snappish enough.
	 */
	if (online) {
		rc = ata_wait_after_reset(link, jiffies + 2 * HZ,
					  ahci_check_ready);
		if (rc)
			ahci_kick_engine(ap);
	}
	return rc;
}

#ifdef CONFIG_PM
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
	struct ata_host *host = pci_get_drvdata(pdev);
	struct ahci_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->mmio;
	u32 ctl;

	if (mesg.event & PM_EVENT_SUSPEND &&
	    hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
		dev_err(&pdev->dev,
			"BIOS update required for suspend/resume\n");
		return -EIO;
	}

	if (mesg.event & PM_EVENT_SLEEP) {
		/* AHCI spec rev1.1 section 8.3.3:
		 * Software must disable interrupts prior to requesting a
		 * transition of the HBA to D3 state.
		 */
		ctl = readl(mmio + HOST_CTL);
		ctl &= ~HOST_IRQ_EN;
		writel(ctl, mmio + HOST_CTL);
		readl(mmio + HOST_CTL); /* flush */
	}

	return ata_pci_device_suspend(pdev, mesg);
}

static int ahci_pci_device_resume(struct pci_dev *pdev)
{
	struct ata_host *host = pci_get_drvdata(pdev);
	int rc;

	rc = ata_pci_device_do_resume(pdev);
	if (rc)
		return rc;

	/* Apple BIOS helpfully mangles the registers on resume */
	if (is_mcp89_apple(pdev))
		ahci_mcp89_apple_enable(pdev);

	if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
		rc = ahci_pci_reset_controller(host);
		if (rc)
			return rc;

		ahci_pci_init_controller(host);
	}

	ata_host_resume(host);

	return 0;
}
#endif

static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
{
	int rc;

	/*
	 * If the device fixup already set the dma_mask to some non-standard
	 * value, don't extend it here. This happens on STA2X11, for example.
	 */
	if (pdev->dma_mask && pdev->dma_mask < DMA_BIT_MASK(32))
		return 0;

	if (using_dac &&
	    !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
		if (rc) {
			rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
			if (rc) {
				dev_err(&pdev->dev,
					"64-bit DMA enable failed\n");
				return rc;
			}
		}
	} else {
		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (rc) {
			dev_err(&pdev->dev, "32-bit DMA enable failed\n");
			return rc;
		}
		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
		if (rc) {
			dev_err(&pdev->dev,
				"32-bit consistent DMA enable failed\n");
			return rc;
		}
	}
	return 0;
}

static void ahci_pci_print_info(struct ata_host *host)
{
	struct pci_dev *pdev = to_pci_dev(host->dev);
	u16 cc;
	const char *scc_s;

	pci_read_config_word(pdev, 0x0a, &cc);
	if (cc == PCI_CLASS_STORAGE_IDE)
		scc_s = "IDE";
	else if (cc == PCI_CLASS_STORAGE_SATA)
		scc_s = "SATA";
	else if (cc == PCI_CLASS_STORAGE_RAID)
		scc_s = "RAID";
	else
		scc_s = "unknown";

	ahci_print_info(host, scc_s);
}

/* On ASUS P5W DH Deluxe, the second port of PCI device 00:1f.2 is
 * hardwired to on-board SIMG 4726.  The chipset is ICH8 and doesn't
 * support PMP and the 4726 either directly exports the device
 * attached to the first downstream port or acts as a hardware storage
 * controller and emulate a single ATA device (can be RAID 0/1 or some
 * other configuration).
 *
 * When there's no device attached to the first downstream port of the
 * 4726, "Config Disk" appears, which is a pseudo ATA device to
 * configure the 4726.  However, ATA emulation of the device is very
 * lame.  It doesn't send signature D2H Reg FIS after the initial
 * hardreset, pukes on SRST w/ PMP==0 and has bunch of other issues.
 *
 * The following function works around the problem by always using
 * hardreset on the port and not depending on receiving signature FIS
 * afterward.  If signature FIS isn't received soon, ATA class is
 * assumed without follow-up softreset.
 */
static void ahci_p5wdh_workaround(struct ata_host *host)
{
	static struct dmi_system_id sysids[] = {
		{
			.ident = "P5W DH Deluxe",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR,
					  "ASUSTEK COMPUTER INC"),
				DMI_MATCH(DMI_PRODUCT_NAME, "P5W DH Deluxe"),
			},
		},
		{ }
	};
	struct pci_dev *pdev = to_pci_dev(host->dev);

	if (pdev->bus->number == 0 && pdev->devfn == PCI_DEVFN(0x1f, 2) &&
	    dmi_check_system(sysids)) {
		struct ata_port *ap = host->ports[1];

		dev_info(&pdev->dev,
			 "enabling ASUS P5W DH Deluxe on-board SIMG4726 workaround\n");

		ap->ops = &ahci_p5wdh_ops;
		ap->link.flags |= ATA_LFLAG_NO_SRST | ATA_LFLAG_ASSUME_ATA;
	}
}

/*
 * Macbook7,1 firmware forcibly disables MCP89 AHCI and changes PCI ID when
 * booting in BIOS compatibility mode.  We restore the registers but not ID.
 */
static void ahci_mcp89_apple_enable(struct pci_dev *pdev)
{
	u32 val;

	printk(KERN_INFO "ahci: enabling MCP89 AHCI mode\n");

	pci_read_config_dword(pdev, 0xf8, &val);
	val |= 1 << 0x1b;
	/* the following changes the device ID, but appears not to affect function */
	/* val = (val & ~0xf0000000) | 0x80000000; */
	pci_write_config_dword(pdev, 0xf8, val);

	pci_read_config_dword(pdev, 0x54c, &val);
	val |= 1 << 0xc;
	pci_write_config_dword(pdev, 0x54c, val);

	pci_read_config_dword(pdev, 0x4a4, &val);
	val &= 0xff;
	val |= 0x01060100;
	pci_write_config_dword(pdev, 0x4a4, val);

	pci_read_config_dword(pdev, 0x54c, &val);
	val &= ~(1 << 0xc);
	pci_write_config_dword(pdev, 0x54c, val);

	pci_read_config_dword(pdev, 0xf8, &val);
	val &= ~(1 << 0x1b);
	pci_write_config_dword(pdev, 0xf8, val);
}

static bool is_mcp89_apple(struct pci_dev *pdev)
{
	return pdev->vendor == PCI_VENDOR_ID_NVIDIA &&
		pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP89_SATA &&
		pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
		pdev->subsystem_device == 0xcb89;
}

/* only some SB600 ahci controllers can do 64bit DMA */
static bool ahci_sb600_enable_64bit(struct pci_dev *pdev)
{
	static const struct dmi_system_id sysids[] = {
		/*
		 * The oldest version known to be broken is 0901 and
		 * working is 1501 which was released on 2007-10-26.
		 * Enable 64bit DMA on 1501 and anything newer.
		 *
		 * Please read bko#9412 for more info.
		 */
		{
			.ident = "ASUS M2A-VM",
			.matches = {
				DMI_MATCH(DMI_BOARD_VENDOR,
					  "ASUSTeK Computer INC."),
				DMI_MATCH(DMI_BOARD_NAME, "M2A-VM"),
			},
			.driver_data = "20071026",	/* yyyymmdd */
		},
		/*
		 * All BIOS versions for the MSI K9A2 Platinum (MS-7376)
		 * support 64bit DMA.
		 *
		 * BIOS versions earlier than 1.5 had the Manufacturer DMI
		 * fields as "MICRO-STAR INTERANTIONAL CO.,LTD".
		 * This spelling mistake was fixed in BIOS version 1.5, so
		 * 1.5 and later have the Manufacturer as
		 * "MICRO-STAR INTERNATIONAL CO.,LTD".
		 * So try to match on DMI_BOARD_VENDOR of "MICRO-STAR INTER".
		 *
		 * BIOS versions earlier than 1.9 had a Board Product Name
		 * DMI field of "MS-7376". This was changed to be
		 * "K9A2 Platinum (MS-7376)" in version 1.9, but we can still
		 * match on DMI_BOARD_NAME of "MS-7376".
		 */
		{
			.ident = "MSI K9A2 Platinum",
			.matches = {
				DMI_MATCH(DMI_BOARD_VENDOR,
					  "MICRO-STAR INTER"),
				DMI_MATCH(DMI_BOARD_NAME, "MS-7376"),
			},
		},
		/*
		 * All BIOS versions for the MSI K9AGM2 (MS-7327) support
		 * 64bit DMA.
		 *
		 * This board also had the typo mentioned above in the
		 * Manufacturer DMI field (fixed in BIOS version 1.5), so
		 * match on DMI_BOARD_VENDOR of "MICRO-STAR INTER" again.
		 */
		{
			.ident = "MSI K9AGM2",
			.matches = {
				DMI_MATCH(DMI_BOARD_VENDOR,
					  "MICRO-STAR INTER"),
				DMI_MATCH(DMI_BOARD_NAME, "MS-7327"),
			},
		},
		/*
		 * All BIOS versions for the Asus M3A support 64bit DMA.
		 * (all release versions from 0301 to 1206 were tested)
		 */
		{
			.ident = "ASUS M3A",
			.matches = {
				DMI_MATCH(DMI_BOARD_VENDOR,
					  "ASUSTeK Computer INC."),
				DMI_MATCH(DMI_BOARD_NAME, "M3A"),
			},
		},
		{ }
	};
	const struct dmi_system_id *match;
	int year, month, date;
	char buf[9];

	match = dmi_first_match(sysids);
	if (pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x12, 0) ||
	    !match)
		return false;

	if (!match->driver_data)
		goto enable_64bit;

	dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
	snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);

	if (strcmp(buf, match->driver_data) >= 0)
		goto enable_64bit;
	else {
		dev_warn(&pdev->dev,
			 "%s: BIOS too old, forcing 32bit DMA, update BIOS\n",
			 match->ident);
		return false;
	}

enable_64bit:
	dev_warn(&pdev->dev, "%s: enabling 64bit DMA\n", match->ident);
	return true;
}

static bool ahci_broken_system_poweroff(struct pci_dev *pdev)
{
	static const struct dmi_system_id broken_systems[] = {
		{
			.ident = "HP Compaq nx6310",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
				DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6310"),
			},
			/* PCI slot number of the controller */
			.driver_data = (void *)0x1FUL,
		},
		{
			.ident = "HP Compaq 6720s",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
				DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6720s"),
			},
			/* PCI slot number of the controller */
			.driver_data = (void *)0x1FUL,
		},

		{ }	/* terminate list */
	};
	const struct dmi_system_id *dmi = dmi_first_match(broken_systems);

	if (dmi) {
		unsigned long slot = (unsigned long)dmi->driver_data;
		/* apply the quirk only to on-board controllers */
		return slot == PCI_SLOT(pdev->devfn);
	}

	return false;
}

static bool ahci_broken_suspend(struct pci_dev *pdev)
{
	static const struct dmi_system_id sysids[] = {
		/*
		 * On HP dv[4-6] and HDX18 with earlier BIOSen, link
		 * to the harddisk doesn't become online after
		 * resuming from STR.  Warn and fail suspend.
		 *
		 * http://bugzilla.kernel.org/show_bug.cgi?id=12276
		 *
		 * Use dates instead of versions to match as HP is
		 * apparently recycling both product and version
		 * strings.
		 *
		 * http://bugzilla.kernel.org/show_bug.cgi?id=15462
		 */
		{
			.ident = "dv4",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
				DMI_MATCH(DMI_PRODUCT_NAME,
					  "HP Pavilion dv4 Notebook PC"),
			},
			.driver_data = "20090105",	/* F.30 */
		},
		{
			.ident = "dv5",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
				DMI_MATCH(DMI_PRODUCT_NAME,
					  "HP Pavilion dv5 Notebook PC"),
			},
			.driver_data = "20090506",	/* F.16 */
		},
		{
			.ident = "dv6",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
				DMI_MATCH(DMI_PRODUCT_NAME,
					  "HP Pavilion dv6 Notebook PC"),
			},
			.driver_data = "20090423",	/* F.21 */
		},
		{
			.ident = "HDX18",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
				DMI_MATCH(DMI_PRODUCT_NAME,
					  "HP HDX18 Notebook PC"),
			},
			.driver_data = "20090430",	/* F.23 */
		},
		/*
		 * Acer eMachines G725 has the same problem.  BIOS
		 * V1.03 is known to be broken.  V3.04 is known to
		 * work.  Between, there are V1.06, V2.06 and V3.03
		 * that we don't have much idea about.  For now,
		 * blacklist anything older than V3.04.
		 *
		 * http://bugzilla.kernel.org/show_bug.cgi?id=15104
		 */
		{
			.ident = "G725",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "eMachines"),
				DMI_MATCH(DMI_PRODUCT_NAME, "eMachines G725"),
			},
			.driver_data = "20091216",	/* V3.04 */
		},
		{ }	/* terminate list */
	};
	const struct dmi_system_id *dmi = dmi_first_match(sysids);
	int year, month, date;
	char buf[9];

	if (!dmi || pdev->bus->number || pdev->devfn != PCI_DEVFN(0x1f, 2))
		return false;

	dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
	snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);

	return strcmp(buf, dmi->driver_data) < 0;
}

static bool ahci_broken_online(struct pci_dev *pdev)
{
#define ENCODE_BUSDEVFN(bus, slot, func)			\
	(void *)(unsigned long)(((bus) << 8) | PCI_DEVFN((slot), (func)))
	static const struct dmi_system_id sysids[] = {
		/*
		 * There are several gigabyte boards which use
		 * SIMG5723s configured as hardware RAID.  Certain
		 * 5723 firmware revisions shipped there keep the link
		 * online but fail to answer properly to SRST or
		 * IDENTIFY when no device is attached downstream
		 * causing libata to retry quite a few times leading
		 * to excessive detection delay.
		 *
		 * As these firmwares respond to the second reset try
		 * with invalid device signature, considering unknown
		 * sig as offline works around the problem acceptably.
		 */
		{
			.ident = "EP45-DQ6",
			.matches = {
				DMI_MATCH(DMI_BOARD_VENDOR,
					  "Gigabyte Technology Co., Ltd."),
				DMI_MATCH(DMI_BOARD_NAME, "EP45-DQ6"),
			},
			.driver_data = ENCODE_BUSDEVFN(0x0a, 0x00, 0),
		},
		{
			.ident = "EP45-DS5",
			.matches = {
				DMI_MATCH(DMI_BOARD_VENDOR,
					  "Gigabyte Technology Co., Ltd."),
				DMI_MATCH(DMI_BOARD_NAME, "EP45-DS5"),
			},
			.driver_data = ENCODE_BUSDEVFN(0x03, 0x00, 0),
		},
		{ }	/* terminate list */
	};
#undef ENCODE_BUSDEVFN
	const struct dmi_system_id *dmi = dmi_first_match(sysids);
	unsigned int val;

	if (!dmi)
		return false;

	val = (unsigned long)dmi->driver_data;

	return pdev->bus->number == (val >> 8) && pdev->devfn == (val & 0xff);
}

static bool ahci_broken_devslp(struct pci_dev *pdev)
{
	/* device with broken DEVSLP but still showing SDS capability */
	static const struct pci_device_id ids[] = {
		{ PCI_VDEVICE(INTEL, 0x0f23)}, /* Valleyview SoC */
		{}
	};

	return pci_match_id(ids, pdev);
}

#ifdef CONFIG_ATA_ACPI
static void ahci_gtf_filter_workaround(struct ata_host *host)
{
	static const struct dmi_system_id sysids[] = {
		/*
		 * Aspire 3810T issues a bunch of SATA enable commands
		 * via _GTF including an invalid one and one which is
		 * rejected by the device.  Among the successful ones
		 * is FPDMA non-zero offset enable which when enabled
		 * only on the drive side leads to NCQ command
		 * failures.  Filter it out.
		 */
		{
			.ident = "Aspire 3810T",
			.matches = {
				DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
				DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3810T"),
			},
			.driver_data = (void *)ATA_ACPI_FILTER_FPDMA_OFFSET,
		},
		{ }
	};
	const struct dmi_system_id *dmi = dmi_first_match(sysids);
	unsigned int filter;
	int i;

	if (!dmi)
		return;

	filter = (unsigned long)dmi->driver_data;
	dev_info(host->dev, "applying extra ACPI _GTF filter 0x%x for %s\n",
		 filter, dmi->ident);

	for (i = 0; i < host->n_ports; i++) {
		struct ata_port *ap = host->ports[i];
		struct ata_link *link;
		struct ata_device *dev;

		ata_for_each_link(link, ap, EDGE)
			ata_for_each_dev(dev, link, ALL)
				dev->gtf_filter |= filter;
	}
}
#else
static inline void ahci_gtf_filter_workaround(struct ata_host *host)
{}
#endif

static int ahci_init_interrupts(struct pci_dev *pdev, unsigned int n_ports,
				struct ahci_host_priv *hpriv)
{
	int rc, nvec;

	if (hpriv->flags & AHCI_HFLAG_NO_MSI)
		goto intx;

	nvec = pci_msi_vec_count(pdev);
	if (nvec < 0)
		goto intx;

	/*
	 * If number of MSIs is less than number of ports then Sharing Last
	 * Message mode could be enforced. In this case assume that advantage
	 * of multipe MSIs is negated and use single MSI mode instead.
	 */
	if (nvec < n_ports)
		goto single_msi;

	rc = pci_enable_msi_exact(pdev, nvec);
	if (rc == -ENOSPC)
		goto single_msi;
	else if (rc < 0)
		goto intx;

	/* fallback to single MSI mode if the controller enforced MRSM mode */
	if (readl(hpriv->mmio + HOST_CTL) & HOST_MRSM) {
		pci_disable_msi(pdev);
		printk(KERN_INFO "ahci: MRSM is on, fallback to single MSI\n");
		goto single_msi;
	}

	return nvec;

single_msi:
	if (pci_enable_msi(pdev))
		goto intx;
	return 1;

intx:
	pci_intx(pdev, 1);
	return 0;
}

/**
 *	ahci_host_activate - start AHCI host, request IRQs and register it
 *	@host: target ATA host
 *	@irq: base IRQ number to request
 *	@n_msis: number of MSIs allocated for this host
 *	@irq_handler: irq_handler used when requesting IRQs
 *	@irq_flags: irq_flags used when requesting IRQs
 *
 *	Similar to ata_host_activate, but requests IRQs according to AHCI-1.1
 *	when multiple MSIs were allocated. That is one MSI per port, starting
 *	from @irq.
 *
 *	LOCKING:
 *	Inherited from calling layer (may sleep).
 *
 *	RETURNS:
 *	0 on success, -errno otherwise.
 */
int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis)
{
	int i, rc;

	/* Sharing Last Message among several ports is not supported */
	if (n_msis < host->n_ports)
		return -EINVAL;

	rc = ata_host_start(host);
	if (rc)
		return rc;

	for (i = 0; i < host->n_ports; i++) {
		struct ahci_port_priv *pp = host->ports[i]->private_data;

		/* Do not receive interrupts sent by dummy ports */
		if (!pp) {
			disable_irq(irq + i);
			continue;
		}

		rc = devm_request_threaded_irq(host->dev, irq + i,
					       ahci_hw_interrupt,
					       ahci_thread_fn, IRQF_SHARED,
					       pp->irq_desc, host->ports[i]);
		if (rc)
			goto out_free_irqs;
	}

	for (i = 0; i < host->n_ports; i++)
		ata_port_desc(host->ports[i], "irq %d", irq + i);

	rc = ata_host_register(host, &ahci_sht);
	if (rc)
		goto out_free_all_irqs;

	return 0;

out_free_all_irqs:
	i = host->n_ports;
out_free_irqs:
	for (i--; i >= 0; i--)
		devm_free_irq(host->dev, irq + i, host->ports[i]);

	return rc;
}

static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	unsigned int board_id = ent->driver_data;
	struct ata_port_info pi = ahci_port_info[board_id];
	const struct ata_port_info *ppi[] = { &pi, NULL };
	struct device *dev = &pdev->dev;
	struct ahci_host_priv *hpriv;
	struct ata_host *host;
	int n_ports, n_msis, i, rc;
	int ahci_pci_bar = AHCI_PCI_BAR_STANDARD;

	VPRINTK("ENTER\n");

	WARN_ON((int)ATA_MAX_QUEUE > AHCI_MAX_CMDS);

	ata_print_version_once(&pdev->dev, DRV_VERSION);

	/* The AHCI driver can only drive the SATA ports, the PATA driver
	   can drive them all so if both drivers are selected make sure
	   AHCI stays out of the way */
	if (pdev->vendor == PCI_VENDOR_ID_MARVELL && !marvell_enable)
		return -ENODEV;

	/* Apple BIOS on MCP89 prevents us using AHCI */
	if (is_mcp89_apple(pdev))
		ahci_mcp89_apple_enable(pdev);

	/* Promise's PDC42819 is a SAS/SATA controller that has an AHCI mode.
	 * At the moment, we can only use the AHCI mode. Let the users know
	 * that for SAS drives they're out of luck.
	 */
	if (pdev->vendor == PCI_VENDOR_ID_PROMISE)
		dev_info(&pdev->dev,
			 "PDC42819 can only drive SATA devices with this driver\n");

	/* Both Connext and Enmotus devices use non-standard BARs */
	if (pdev->vendor == PCI_VENDOR_ID_STMICRO && pdev->device == 0xCC06)
		ahci_pci_bar = AHCI_PCI_BAR_STA2X11;
	else if (pdev->vendor == 0x1c44 && pdev->device == 0x8000)
		ahci_pci_bar = AHCI_PCI_BAR_ENMOTUS;

	/* acquire resources */
	rc = pcim_enable_device(pdev);
	if (rc)
		return rc;

	if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
	    (pdev->device == 0x2652 || pdev->device == 0x2653)) {
		u8 map;

		/* ICH6s share the same PCI ID for both piix and ahci
		 * modes.  Enabling ahci mode while MAP indicates
		 * combined mode is a bad idea.  Yield to ata_piix.
		 */
		pci_read_config_byte(pdev, ICH_MAP, &map);
		if (map & 0x3) {
			dev_info(&pdev->dev,
				 "controller is in combined mode, can't enable AHCI mode\n");
			return -ENODEV;
		}
	}

	/* AHCI controllers often implement SFF compatible interface.
	 * Grab all PCI BARs just in case.
	 */
	rc = pcim_iomap_regions_request_all(pdev, 1 << ahci_pci_bar, DRV_NAME);
	if (rc == -EBUSY)
		pcim_pin_device(pdev);
	if (rc)
		return rc;

	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
	if (!hpriv)
		return -ENOMEM;
	hpriv->flags |= (unsigned long)pi.private_data;

	/* MCP65 revision A1 and A2 can't do MSI */
	if (board_id == board_ahci_mcp65 &&
	    (pdev->revision == 0xa1 || pdev->revision == 0xa2))
		hpriv->flags |= AHCI_HFLAG_NO_MSI;

	/* SB800 does NOT need the workaround to ignore SERR_INTERNAL */
	if (board_id == board_ahci_sb700 && pdev->revision >= 0x40)
		hpriv->flags &= ~AHCI_HFLAG_IGN_SERR_INTERNAL;

	/* only some SB600s can do 64bit DMA */
	if (ahci_sb600_enable_64bit(pdev))
		hpriv->flags &= ~AHCI_HFLAG_32BIT_ONLY;

	hpriv->mmio = pcim_iomap_table(pdev)[ahci_pci_bar];

	/* must set flag prior to save config in order to take effect */
	if (ahci_broken_devslp(pdev))
		hpriv->flags |= AHCI_HFLAG_NO_DEVSLP;

	/* save initial config */
	ahci_pci_save_initial_config(pdev, hpriv);

	/* prepare host */
	if (hpriv->cap & HOST_CAP_NCQ) {
		pi.flags |= ATA_FLAG_NCQ;
		/*
		 * Auto-activate optimization is supposed to be
		 * supported on all AHCI controllers indicating NCQ
		 * capability, but it seems to be broken on some
		 * chipsets including NVIDIAs.
		 */
		if (!(hpriv->flags & AHCI_HFLAG_NO_FPDMA_AA))
			pi.flags |= ATA_FLAG_FPDMA_AA;

		/*
		 * All AHCI controllers should be forward-compatible
		 * with the new auxiliary field. This code should be
		 * conditionalized if any buggy AHCI controllers are
		 * encountered.
		 */
		pi.flags |= ATA_FLAG_FPDMA_AUX;
	}

	if (hpriv->cap & HOST_CAP_PMP)
		pi.flags |= ATA_FLAG_PMP;

	ahci_set_em_messages(hpriv, &pi);

	if (ahci_broken_system_poweroff(pdev)) {
		pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN;
		dev_info(&pdev->dev,
			"quirky BIOS, skipping spindown on poweroff\n");
	}

	if (ahci_broken_suspend(pdev)) {
		hpriv->flags |= AHCI_HFLAG_NO_SUSPEND;
		dev_warn(&pdev->dev,
			 "BIOS update required for suspend/resume\n");
	}

	if (ahci_broken_online(pdev)) {
		hpriv->flags |= AHCI_HFLAG_SRST_TOUT_IS_OFFLINE;
		dev_info(&pdev->dev,
			 "online status unreliable, applying workaround\n");
	}

	/* CAP.NP sometimes indicate the index of the last enabled
	 * port, at other times, that of the last possible port, so
	 * determining the maximum port number requires looking at
	 * both CAP.NP and port_map.
	 */
	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));

	n_msis = ahci_init_interrupts(pdev, n_ports, hpriv);
	if (n_msis > 1)
		hpriv->flags |= AHCI_HFLAG_MULTI_MSI;

	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
	if (!host)
		return -ENOMEM;
	host->private_data = hpriv;

	if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
		host->flags |= ATA_HOST_PARALLEL_SCAN;
	else
		dev_info(&pdev->dev, "SSS flag set, parallel bus scan disabled\n");

	if (pi.flags & ATA_FLAG_EM)
		ahci_reset_em(host);

	for (i = 0; i < host->n_ports; i++) {
		struct ata_port *ap = host->ports[i];

		ata_port_pbar_desc(ap, ahci_pci_bar, -1, "abar");
		ata_port_pbar_desc(ap, ahci_pci_bar,
				   0x100 + ap->port_no * 0x80, "port");

		/* set enclosure management message type */
		if (ap->flags & ATA_FLAG_EM)
			ap->em_message_type = hpriv->em_msg_type;


		/* disabled/not-implemented port */
		if (!(hpriv->port_map & (1 << i)))
			ap->ops = &ata_dummy_port_ops;
	}

	/* apply workaround for ASUS P5W DH Deluxe mainboard */
	ahci_p5wdh_workaround(host);

	/* apply gtf filter quirk */
	ahci_gtf_filter_workaround(host);

	/* initialize adapter */
	rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
	if (rc)
		return rc;

	rc = ahci_pci_reset_controller(host);
	if (rc)
		return rc;

	ahci_pci_init_controller(host);
	ahci_pci_print_info(host);

	pci_set_master(pdev);

	if (hpriv->flags & AHCI_HFLAG_MULTI_MSI)
		return ahci_host_activate(host, pdev->irq, n_msis);

	return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
				 &ahci_sht);
}

module_pci_driver(ahci_pci_driver);

MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("AHCI SATA low-level driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
MODULE_VERSION(DRV_VERSION);