aboutsummaryrefslogtreecommitdiff
path: root/include/linux/ide.h
blob: a633898f36ac83f387f6de86350f7768a3d73b6e (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
#ifndef _IDE_H
#define _IDE_H
/*
 *  linux/include/linux/ide.h
 *
 *  Copyright (C) 1994-2002  Linus Torvalds & authors
 */

#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/ata.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/bio.h>
#include <linux/pci.h>
#include <linux/completion.h>
#include <linux/pm.h>
#include <linux/mutex.h>
/* for request_sense */
#include <linux/cdrom.h>
#include <asm/byteorder.h>
#include <asm/io.h>

#if defined(CONFIG_CRIS) || defined(CONFIG_FRV) || defined(CONFIG_MN10300)
# define SUPPORT_VLB_SYNC 0
#else
# define SUPPORT_VLB_SYNC 1
#endif

/*
 * Probably not wise to fiddle with these
 */
#define IDE_DEFAULT_MAX_FAILURES	1
#define ERROR_MAX	8	/* Max read/write errors per sector */
#define ERROR_RESET	3	/* Reset controller every 4th retry */
#define ERROR_RECAL	1	/* Recalibrate every 2nd retry */

struct device;

/* IDE-specific values for req->cmd_type */
enum ata_cmd_type_bits {
	REQ_TYPE_ATA_TASKFILE = REQ_TYPE_DRV_PRIV + 1,
	REQ_TYPE_ATA_PC,
	REQ_TYPE_ATA_SENSE,	/* sense request */
	REQ_TYPE_ATA_PM_SUSPEND,/* suspend request */
	REQ_TYPE_ATA_PM_RESUME,	/* resume request */
};

#define ata_pm_request(rq)	\
	((rq)->cmd_type == REQ_TYPE_ATA_PM_SUSPEND || \
	 (rq)->cmd_type == REQ_TYPE_ATA_PM_RESUME)

/* Error codes returned in rq->errors to the higher part of the driver. */
enum {
	IDE_DRV_ERROR_GENERAL	= 101,
	IDE_DRV_ERROR_FILEMARK	= 102,
	IDE_DRV_ERROR_EOD	= 103,
};

/*
 * Definitions for accessing IDE controller registers
 */
#define IDE_NR_PORTS		(10)

struct ide_io_ports {
	unsigned long	data_addr;

	union {
		unsigned long error_addr;	/*   read:  error */
		unsigned long feature_addr;	/*  write: feature */
	};

	unsigned long	nsect_addr;
	unsigned long	lbal_addr;
	unsigned long	lbam_addr;
	unsigned long	lbah_addr;

	unsigned long	device_addr;

	union {
		unsigned long status_addr;	/*  read: status  */
		unsigned long command_addr;	/* write: command */
	};

	unsigned long	ctl_addr;

	unsigned long	irq_addr;
};

#define OK_STAT(stat,good,bad)	(((stat)&((good)|(bad)))==(good))

#define BAD_R_STAT	(ATA_BUSY | ATA_ERR)
#define BAD_W_STAT	(BAD_R_STAT | ATA_DF)
#define BAD_STAT	(BAD_R_STAT | ATA_DRQ)
#define DRIVE_READY	(ATA_DRDY | ATA_DSC)

#define BAD_CRC		(ATA_ABORTED | ATA_ICRC)

#define SATA_NR_PORTS		(3)	/* 16 possible ?? */

#define SATA_STATUS_OFFSET	(0)
#define SATA_ERROR_OFFSET	(1)
#define SATA_CONTROL_OFFSET	(2)

/*
 * Our Physical Region Descriptor (PRD) table should be large enough
 * to handle the biggest I/O request we are likely to see.  Since requests
 * can have no more than 256 sectors, and since the typical blocksize is
 * two or more sectors, we could get by with a limit of 128 entries here for
 * the usual worst case.  Most requests seem to include some contiguous blocks,
 * further reducing the number of table entries required.
 *
 * The driver reverts to PIO mode for individual requests that exceed
 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 * 100% of all crazy scenarios here is not necessary.
 *
 * As it turns out though, we must allocate a full 4KB page for this,
 * so the two PRD tables (ide0 & ide1) will each get half of that,
 * allowing each to have about 256 entries (8 bytes each) from this.
 */
#define PRD_BYTES       8
#define PRD_ENTRIES	256

/*
 * Some more useful definitions
 */
#define PARTN_BITS	6	/* number of minor dev bits for partitions */
#define MAX_DRIVES	2	/* per interface; 2 assumed by lots of code */
#define SECTOR_SIZE	512

/*
 * Timeouts for various operations:
 */
enum {
	/* spec allows up to 20ms, but CF cards and SSD drives need more */
	WAIT_DRQ	= 1 * HZ,	/* 1s */
	/* some laptops are very slow */
	WAIT_READY	= 5 * HZ,	/* 5s */
	/* should be less than 3ms (?), if all ATAPI CD is closed at boot */
	WAIT_PIDENTIFY	= 10 * HZ,	/* 10s */
	/* worst case when spinning up */
	WAIT_WORSTCASE	= 30 * HZ,	/* 30s */
	/* maximum wait for an IRQ to happen */
	WAIT_CMD	= 10 * HZ,	/* 10s */
	/* Some drives require a longer IRQ timeout. */
	WAIT_FLOPPY_CMD	= 50 * HZ,	/* 50s */
	/*
	 * Some drives (for example, Seagate STT3401A Travan) require a very
	 * long timeout, because they don't return an interrupt or clear their
	 * BSY bit until after the command completes (even retension commands).
	 */
	WAIT_TAPE_CMD	= 900 * HZ,	/* 900s */
	/* minimum sleep time */
	WAIT_MIN_SLEEP	= HZ / 50,	/* 20ms */
};

/*
 * Op codes for special requests to be handled by ide_special_rq().
 * Values should be in the range of 0x20 to 0x3f.
 */
#define REQ_DRIVE_RESET		0x20
#define REQ_DEVSET_EXEC		0x21
#define REQ_PARK_HEADS		0x22
#define REQ_UNPARK_HEADS	0x23

/*
 * hwif_chipset_t is used to keep track of the specific hardware
 * chipset used by each IDE interface, if known.
 */
enum {		ide_unknown,	ide_generic,	ide_pci,
		ide_cmd640,	ide_dtc2278,	ide_ali14xx,
		ide_qd65xx,	ide_umc8672,	ide_ht6560b,
		ide_4drives,	ide_pmac,	ide_acorn,
		ide_au1xxx,	ide_palm3710
};

typedef u8 hwif_chipset_t;

/*
 * Structure to hold all information about the location of this port
 */
struct ide_hw {
	union {
		struct ide_io_ports	io_ports;
		unsigned long		io_ports_array[IDE_NR_PORTS];
	};

	int		irq;			/* our irq number */
	struct device	*dev, *parent;
	unsigned long	config;
};

static inline void ide_std_init_ports(struct ide_hw *hw,
				      unsigned long io_addr,
				      unsigned long ctl_addr)
{
	unsigned int i;

	for (i = 0; i <= 7; i++)
		hw->io_ports_array[i] = io_addr++;

	hw->io_ports.ctl_addr = ctl_addr;
}

#define MAX_HWIFS	10

/*
 * Now for the data we need to maintain per-drive:  ide_drive_t
 */

#define ide_scsi	0x21
#define ide_disk	0x20
#define ide_optical	0x7
#define ide_cdrom	0x5
#define ide_tape	0x1
#define ide_floppy	0x0

/*
 * Special Driver Flags
 */
enum {
	IDE_SFLAG_SET_GEOMETRY		= (1 << 0),
	IDE_SFLAG_RECALIBRATE		= (1 << 1),
	IDE_SFLAG_SET_MULTMODE		= (1 << 2),
};

/*
 * Status returned from various ide_ functions
 */
typedef enum {
	ide_stopped,	/* no drive operation was started */
	ide_started,	/* a drive operation was started, handler was set */
} ide_startstop_t;

enum {
	IDE_VALID_ERROR 		= (1 << 1),
	IDE_VALID_FEATURE		= IDE_VALID_ERROR,
	IDE_VALID_NSECT 		= (1 << 2),
	IDE_VALID_LBAL			= (1 << 3),
	IDE_VALID_LBAM			= (1 << 4),
	IDE_VALID_LBAH			= (1 << 5),
	IDE_VALID_DEVICE		= (1 << 6),
	IDE_VALID_LBA			= IDE_VALID_LBAL |
					  IDE_VALID_LBAM |
					  IDE_VALID_LBAH,
	IDE_VALID_OUT_TF		= IDE_VALID_FEATURE |
					  IDE_VALID_NSECT |
					  IDE_VALID_LBA,
	IDE_VALID_IN_TF 		= IDE_VALID_NSECT |
					  IDE_VALID_LBA,
	IDE_VALID_OUT_HOB		= IDE_VALID_OUT_TF,
	IDE_VALID_IN_HOB		= IDE_VALID_ERROR |
					  IDE_VALID_NSECT |
					  IDE_VALID_LBA,
};

enum {
	IDE_TFLAG_LBA48			= (1 << 0),
	IDE_TFLAG_WRITE			= (1 << 1),
	IDE_TFLAG_CUSTOM_HANDLER	= (1 << 2),
	IDE_TFLAG_DMA_PIO_FALLBACK	= (1 << 3),
	/* force 16-bit I/O operations */
	IDE_TFLAG_IO_16BIT		= (1 << 4),
	/* struct ide_cmd was allocated using kmalloc() */
	IDE_TFLAG_DYN			= (1 << 5),
	IDE_TFLAG_FS			= (1 << 6),
	IDE_TFLAG_MULTI_PIO		= (1 << 7),
	IDE_TFLAG_SET_XFER		= (1 << 8),
};

enum {
	IDE_FTFLAG_FLAGGED		= (1 << 0),
	IDE_FTFLAG_SET_IN_FLAGS		= (1 << 1),
	IDE_FTFLAG_OUT_DATA		= (1 << 2),
	IDE_FTFLAG_IN_DATA		= (1 << 3),
};

struct ide_taskfile {
	u8	data;		/* 0: data byte (for TASKFILE ioctl) */
	union {			/* 1: */
		u8 error;	/*  read: error */
		u8 feature;	/* write: feature */
	};
	u8	nsect;		/* 2: number of sectors */
	u8	lbal;		/* 3: LBA low */
	u8	lbam;		/* 4: LBA mid */
	u8	lbah;		/* 5: LBA high */
	u8	device;		/* 6: device select */
	union {			/* 7: */
		u8 status;	/*  read: status */
		u8 command;	/* write: command */
	};
};

struct ide_cmd {
	struct ide_taskfile	tf;
	struct ide_taskfile	hob;
	struct {
		struct {
			u8		tf;
			u8		hob;
		} out, in;
	} valid;

	u16			tf_flags;
	u8			ftf_flags;	/* for TASKFILE ioctl */
	int			protocol;

	int			sg_nents;	  /* number of sg entries */
	int			orig_sg_nents;
	int			sg_dma_direction; /* DMA transfer direction */

	unsigned int		nbytes;
	unsigned int		nleft;
	unsigned int		last_xfer_len;

	struct scatterlist	*cursg;
	unsigned int		cursg_ofs;

	struct request		*rq;		/* copy of request */
};

/* ATAPI packet command flags */
enum {
	/* set when an error is considered normal - no retry (ide-tape) */
	PC_FLAG_ABORT			= (1 << 0),
	PC_FLAG_SUPPRESS_ERROR		= (1 << 1),
	PC_FLAG_WAIT_FOR_DSC		= (1 << 2),
	PC_FLAG_DMA_OK			= (1 << 3),
	PC_FLAG_DMA_IN_PROGRESS		= (1 << 4),
	PC_FLAG_DMA_ERROR		= (1 << 5),
	PC_FLAG_WRITING			= (1 << 6),
};

#define ATAPI_WAIT_PC		(60 * HZ)

struct ide_atapi_pc {
	/* actual packet bytes */
	u8 c[12];
	/* incremented on each retry */
	int retries;
	int error;

	/* bytes to transfer */
	int req_xfer;

	/* the corresponding request */
	struct request *rq;

	unsigned long flags;

	/*
	 * those are more or less driver-specific and some of them are subject
	 * to change/removal later.
	 */
	unsigned long timeout;
};

struct ide_devset;
struct ide_driver;

#ifdef CONFIG_BLK_DEV_IDEACPI
struct ide_acpi_drive_link;
struct ide_acpi_hwif_link;
#endif

struct ide_drive_s;

struct ide_disk_ops {
	int		(*check)(struct ide_drive_s *, const char *);
	int		(*get_capacity)(struct ide_drive_s *);
	void		(*unlock_native_capacity)(struct ide_drive_s *);
	void		(*setup)(struct ide_drive_s *);
	void		(*flush)(struct ide_drive_s *);
	int		(*init_media)(struct ide_drive_s *, struct gendisk *);
	int		(*set_doorlock)(struct ide_drive_s *, struct gendisk *,
					int);
	ide_startstop_t	(*do_request)(struct ide_drive_s *, struct request *,
				      sector_t);
	int		(*ioctl)(struct ide_drive_s *, struct block_device *,
				 fmode_t, unsigned int, unsigned long);
};

/* ATAPI device flags */
enum {
	IDE_AFLAG_DRQ_INTERRUPT		= (1 << 0),

	/* ide-cd */
	/* Drive cannot eject the disc. */
	IDE_AFLAG_NO_EJECT		= (1 << 1),
	/* Drive is a pre ATAPI 1.2 drive. */
	IDE_AFLAG_PRE_ATAPI12		= (1 << 2),
	/* TOC addresses are in BCD. */
	IDE_AFLAG_TOCADDR_AS_BCD	= (1 << 3),
	/* TOC track numbers are in BCD. */
	IDE_AFLAG_TOCTRACKS_AS_BCD	= (1 << 4),
	/* Saved TOC information is current. */
	IDE_AFLAG_TOC_VALID		= (1 << 6),
	/* We think that the drive door is locked. */
	IDE_AFLAG_DOOR_LOCKED		= (1 << 7),
	/* SET_CD_SPEED command is unsupported. */
	IDE_AFLAG_NO_SPEED_SELECT	= (1 << 8),
	IDE_AFLAG_VERTOS_300_SSD	= (1 << 9),
	IDE_AFLAG_VERTOS_600_ESD	= (1 << 10),
	IDE_AFLAG_SANYO_3CD		= (1 << 11),
	IDE_AFLAG_FULL_CAPS_PAGE	= (1 << 12),
	IDE_AFLAG_PLAY_AUDIO_OK		= (1 << 13),
	IDE_AFLAG_LE_SPEED_FIELDS	= (1 << 14),

	/* ide-floppy */
	/* Avoid commands not supported in Clik drive */
	IDE_AFLAG_CLIK_DRIVE		= (1 << 15),
	/* Requires BH algorithm for packets */
	IDE_AFLAG_ZIP_DRIVE		= (1 << 16),
	/* Supports format progress report */
	IDE_AFLAG_SRFP			= (1 << 17),

	/* ide-tape */
	IDE_AFLAG_IGNORE_DSC		= (1 << 18),
	/* 0 When the tape position is unknown */
	IDE_AFLAG_ADDRESS_VALID		= (1 <<	19),
	/* Device already opened */
	IDE_AFLAG_BUSY			= (1 << 20),
	/* Attempt to auto-detect the current user block size */
	IDE_AFLAG_DETECT_BS		= (1 << 21),
	/* Currently on a filemark */
	IDE_AFLAG_FILEMARK		= (1 << 22),
	/* 0 = no tape is loaded, so we don't rewind after ejecting */
	IDE_AFLAG_MEDIUM_PRESENT	= (1 << 23),

	IDE_AFLAG_NO_AUTOCLOSE		= (1 << 24),
};

/* device flags */
enum {
	/* restore settings after device reset */
	IDE_DFLAG_KEEP_SETTINGS		= (1 << 0),
	/* device is using DMA for read/write */
	IDE_DFLAG_USING_DMA		= (1 << 1),
	/* okay to unmask other IRQs */
	IDE_DFLAG_UNMASK		= (1 << 2),
	/* don't attempt flushes */
	IDE_DFLAG_NOFLUSH		= (1 << 3),
	/* DSC overlap */
	IDE_DFLAG_DSC_OVERLAP		= (1 << 4),
	/* give potential excess bandwidth */
	IDE_DFLAG_NICE1			= (1 << 5),
	/* device is physically present */
	IDE_DFLAG_PRESENT		= (1 << 6),
	/* disable Host Protected Area */
	IDE_DFLAG_NOHPA			= (1 << 7),
	/* id read from device (synthetic if not set) */
	IDE_DFLAG_ID_READ		= (1 << 8),
	IDE_DFLAG_NOPROBE		= (1 << 9),
	/* need to do check_media_change() */
	IDE_DFLAG_REMOVABLE		= (1 << 10),
	/* needed for removable devices */
	IDE_DFLAG_ATTACH		= (1 << 11),
	IDE_DFLAG_FORCED_GEOM		= (1 << 12),
	/* disallow setting unmask bit */
	IDE_DFLAG_NO_UNMASK		= (1 << 13),
	/* disallow enabling 32-bit I/O */
	IDE_DFLAG_NO_IO_32BIT		= (1 << 14),
	/* for removable only: door lock/unlock works */
	IDE_DFLAG_DOORLOCKING		= (1 << 15),
	/* disallow DMA */
	IDE_DFLAG_NODMA			= (1 << 16),
	/* powermanagement told us not to do anything, so sleep nicely */
	IDE_DFLAG_BLOCKED		= (1 << 17),
	/* sleeping & sleep field valid */
	IDE_DFLAG_SLEEPING		= (1 << 18),
	IDE_DFLAG_POST_RESET		= (1 << 19),
	IDE_DFLAG_UDMA33_WARNED		= (1 << 20),
	IDE_DFLAG_LBA48			= (1 << 21),
	/* status of write cache */
	IDE_DFLAG_WCACHE		= (1 << 22),
	/* used for ignoring ATA_DF */
	IDE_DFLAG_NOWERR		= (1 << 23),
	/* retrying in PIO */
	IDE_DFLAG_DMA_PIO_RETRY		= (1 << 24),
	IDE_DFLAG_LBA			= (1 << 25),
	/* don't unload heads */
	IDE_DFLAG_NO_UNLOAD		= (1 << 26),
	/* heads unloaded, please don't reset port */
	IDE_DFLAG_PARKED		= (1 << 27),
	IDE_DFLAG_MEDIA_CHANGED		= (1 << 28),
	/* write protect */
	IDE_DFLAG_WP			= (1 << 29),
	IDE_DFLAG_FORMAT_IN_PROGRESS	= (1 << 30),
	IDE_DFLAG_NIEN_QUIRK		= (1 << 31),
};

struct ide_drive_s {
	char		name[4];	/* drive name, such as "hda" */
        char            driver_req[10];	/* requests specific driver */

	struct request_queue	*queue;	/* request queue */

	struct request		*rq;	/* current request */
	void		*driver_data;	/* extra driver data */
	u16			*id;	/* identification info */
#ifdef CONFIG_IDE_PROC_FS
	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
	const struct ide_proc_devset *settings; /* /proc/ide/ drive settings */
#endif
	struct hwif_s		*hwif;	/* actually (ide_hwif_t *) */

	const struct ide_disk_ops *disk_ops;

	unsigned long dev_flags;

	unsigned long sleep;		/* sleep until this time */
	unsigned long timeout;		/* max time to wait for irq */

	u8	special_flags;		/* special action flags */

	u8	select;			/* basic drive/head select reg value */
	u8	retry_pio;		/* retrying dma capable host in pio */
	u8	waiting_for_dma;	/* dma currently in progress */
	u8	dma;			/* atapi dma flag */

        u8	init_speed;	/* transfer rate set at boot */
        u8	current_speed;	/* current transfer rate set */
	u8	desired_speed;	/* desired transfer rate set */
	u8	pio_mode;	/* for ->set_pio_mode _only_ */
	u8	dma_mode;	/* for ->set_dma_mode _only_ */
	u8	dn;		/* now wide spread use */
	u8	acoustic;	/* acoustic management */
	u8	media;		/* disk, cdrom, tape, floppy, ... */
	u8	ready_stat;	/* min status value for drive ready */
	u8	mult_count;	/* current multiple sector setting */
	u8	mult_req;	/* requested multiple sector setting */
	u8	io_32bit;	/* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
	u8	bad_wstat;	/* used for ignoring ATA_DF */
	u8	head;		/* "real" number of heads */
	u8	sect;		/* "real" sectors per track */
	u8	bios_head;	/* BIOS/fdisk/LILO number of heads */
	u8	bios_sect;	/* BIOS/fdisk/LILO sectors per track */

	/* delay this long before sending packet command */
	u8 pc_delay;

	unsigned int	bios_cyl;	/* BIOS/fdisk/LILO number of cyls */
	unsigned int	cyl;		/* "real" number of cyls */
	void		*drive_data;	/* used by set_pio_mode/dev_select() */
	unsigned int	failures;	/* current failure count */
	unsigned int	max_failures;	/* maximum allowed failure count */
	u64		probed_capacity;/* initial/native media capacity */
	u64		capacity64;	/* total number of sectors */

	int		lun;		/* logical unit */
	int		crc_count;	/* crc counter to reduce drive speed */

	unsigned long	debug_mask;	/* debugging levels switch */

#ifdef CONFIG_BLK_DEV_IDEACPI
	struct ide_acpi_drive_link *acpidata;
#endif
	struct list_head list;
	struct device	gendev;
	struct completion gendev_rel_comp;	/* to deal with device release() */

	/* current packet command */
	struct ide_atapi_pc *pc;

	/* last failed packet command */
	struct ide_atapi_pc *failed_pc;

	/* callback for packet commands */
	int  (*pc_callback)(struct ide_drive_s *, int);

	ide_startstop_t (*irq_handler)(struct ide_drive_s *);

	unsigned long atapi_flags;

	struct ide_atapi_pc request_sense_pc;

	/* current sense rq and buffer */
	bool sense_rq_armed;
	struct request sense_rq;
	struct request_sense sense_data;
};

typedef struct ide_drive_s ide_drive_t;

#define to_ide_device(dev)		container_of(dev, ide_drive_t, gendev)

#define to_ide_drv(obj, cont_type)	\
	container_of(obj, struct cont_type, dev)

#define ide_drv_g(disk, cont_type)	\
	container_of((disk)->private_data, struct cont_type, driver)

struct ide_port_info;

struct ide_tp_ops {
	void	(*exec_command)(struct hwif_s *, u8);
	u8	(*read_status)(struct hwif_s *);
	u8	(*read_altstatus)(struct hwif_s *);
	void	(*write_devctl)(struct hwif_s *, u8);

	void	(*dev_select)(ide_drive_t *);
	void	(*tf_load)(ide_drive_t *, struct ide_taskfile *, u8);
	void	(*tf_read)(ide_drive_t *, struct ide_taskfile *, u8);

	void	(*input_data)(ide_drive_t *, struct ide_cmd *,
			      void *, unsigned int);
	void	(*output_data)(ide_drive_t *, struct ide_cmd *,
			       void *, unsigned int);
};

extern const struct ide_tp_ops default_tp_ops;

/**
 * struct ide_port_ops - IDE port operations
 *
 * @init_dev:		host specific initialization of a device
 * @set_pio_mode:	routine to program host for PIO mode
 * @set_dma_mode:	routine to program host for DMA mode
 * @reset_poll:		chipset polling based on hba specifics
 * @pre_reset:		chipset specific changes to default for device-hba resets
 * @resetproc:		routine to reset controller after a disk reset
 * @maskproc:		special host masking for drive selection
 * @quirkproc:		check host's drive quirk list
 * @clear_irq:		clear IRQ
 *
 * @mdma_filter:	filter MDMA modes
 * @udma_filter:	filter UDMA modes
 *
 * @cable_detect:	detect cable type
 */
struct ide_port_ops {
	void	(*init_dev)(ide_drive_t *);
	void	(*set_pio_mode)(struct hwif_s *, ide_drive_t *);
	void	(*set_dma_mode)(struct hwif_s *, ide_drive_t *);
	int	(*reset_poll)(ide_drive_t *);
	void	(*pre_reset)(ide_drive_t *);
	void	(*resetproc)(ide_drive_t *);
	void	(*maskproc)(ide_drive_t *, int);
	void	(*quirkproc)(ide_drive_t *);
	void	(*clear_irq)(ide_drive_t *);
	int	(*test_irq)(struct hwif_s *);

	u8	(*mdma_filter)(ide_drive_t *);
	u8	(*udma_filter)(ide_drive_t *);

	u8	(*cable_detect)(struct hwif_s *);
};

struct ide_dma_ops {
	void	(*dma_host_set)(struct ide_drive_s *, int);
	int	(*dma_setup)(struct ide_drive_s *, struct ide_cmd *);
	void	(*dma_start)(struct ide_drive_s *);
	int	(*dma_end)(struct ide_drive_s *);
	int	(*dma_test_irq)(struct ide_drive_s *);
	void	(*dma_lost_irq)(struct ide_drive_s *);
	/* below ones are optional */
	int	(*dma_check)(struct ide_drive_s *, struct ide_cmd *);
	int	(*dma_timer_expiry)(struct ide_drive_s *);
	void	(*dma_clear)(struct ide_drive_s *);
	/*
	 * The following method is optional and only required to be
	 * implemented for the SFF-8038i compatible controllers.
	 */
	u8	(*dma_sff_read_status)(struct hwif_s *);
};

enum {
	IDE_PFLAG_PROBING		= (1 << 0),
};

struct ide_host;

typedef struct hwif_s {
	struct hwif_s *mate;		/* other hwif from same PCI chip */
	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */

	struct ide_host *host;

	char name[6];			/* name of interface, eg. "ide0" */

	struct ide_io_ports	io_ports;

	unsigned long	sata_scr[SATA_NR_PORTS];

	ide_drive_t	*devices[MAX_DRIVES + 1];

	unsigned long	port_flags;

	u8 major;	/* our major number */
	u8 index;	/* 0 for ide0; 1 for ide1; ... */
	u8 channel;	/* for dual-port chips: 0=primary, 1=secondary */

	u32 host_flags;

	u8 pio_mask;

	u8 ultra_mask;
	u8 mwdma_mask;
	u8 swdma_mask;

	u8 cbl;		/* cable type */

	hwif_chipset_t chipset;	/* sub-module for tuning.. */

	struct device *dev;

	void (*rw_disk)(ide_drive_t *, struct request *);

	const struct ide_tp_ops		*tp_ops;
	const struct ide_port_ops	*port_ops;
	const struct ide_dma_ops	*dma_ops;

	/* dma physical region descriptor table (cpu view) */
	unsigned int	*dmatable_cpu;
	/* dma physical region descriptor table (dma view) */
	dma_addr_t	dmatable_dma;

	/* maximum number of PRD table entries */
	int prd_max_nents;
	/* PRD entry size in bytes */
	int prd_ent_size;

	/* Scatter-gather list used to build the above */
	struct scatterlist *sg_table;
	int sg_max_nents;		/* Maximum number of entries in it */

	struct ide_cmd cmd;		/* current command */

	int		rqsize;		/* max sectors per request */
	int		irq;		/* our irq number */

	unsigned long	dma_base;	/* base addr for dma ports */

	unsigned long	config_data;	/* for use by chipset-specific code */
	unsigned long	select_data;	/* for use by chipset-specific code */

	unsigned long	extra_base;	/* extra addr for dma ports */
	unsigned	extra_ports;	/* number of extra dma ports */

	unsigned	present    : 1;	/* this interface exists */
	unsigned	busy	   : 1; /* serializes devices on a port */

	struct device		gendev;
	struct device		*portdev;

	struct completion gendev_rel_comp; /* To deal with device release() */

	void		*hwif_data;	/* extra hwif data */

#ifdef CONFIG_BLK_DEV_IDEACPI
	struct ide_acpi_hwif_link *acpidata;
#endif

	/* IRQ handler, if active */
	ide_startstop_t	(*handler)(ide_drive_t *);

	/* BOOL: polling active & poll_timeout field valid */
	unsigned int polling : 1;

	/* current drive */
	ide_drive_t *cur_dev;

	/* current request */
	struct request *rq;

	/* failsafe timer */
	struct timer_list timer;
	/* timeout value during long polls */
	unsigned long poll_timeout;
	/* queried upon timeouts */
	int (*expiry)(ide_drive_t *);

	int req_gen;
	int req_gen_timer;

	spinlock_t lock;
} ____cacheline_internodealigned_in_smp ide_hwif_t;

#define MAX_HOST_PORTS 4

struct ide_host {
	ide_hwif_t	*ports[MAX_HOST_PORTS + 1];
	unsigned int	n_ports;
	struct device	*dev[2];

	int		(*init_chipset)(struct pci_dev *);

	void		(*get_lock)(irq_handler_t, void *);
	void		(*release_lock)(void);

	irq_handler_t	irq_handler;

	unsigned long	host_flags;

	int		irq_flags;

	void		*host_priv;
	ide_hwif_t	*cur_port;	/* for hosts requiring serialization */

	/* used for hosts requiring serialization */
	volatile unsigned long	host_busy;
};

#define IDE_HOST_BUSY 0

/*
 *  internal ide interrupt handler type
 */
typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
typedef int (ide_expiry_t)(ide_drive_t *);

/* used by ide-cd, ide-floppy, etc. */
typedef void (xfer_func_t)(ide_drive_t *, struct ide_cmd *, void *, unsigned);

extern struct mutex ide_setting_mtx;

/*
 * configurable drive settings
 */

#define DS_SYNC	(1 << 0)

struct ide_devset {
	int		(*get)(ide_drive_t *);
	int		(*set)(ide_drive_t *, int);
	unsigned int	flags;
};

#define __DEVSET(_flags, _get, _set) { \
	.flags	= _flags, \
	.get	= _get,	\
	.set	= _set,	\
}

#define ide_devset_get(name, field) \
static int get_##name(ide_drive_t *drive) \
{ \
	return drive->field; \
}

#define ide_devset_set(name, field) \
static int set_##name(ide_drive_t *drive, int arg) \
{ \
	drive->field = arg; \
	return 0; \
}

#define ide_devset_get_flag(name, flag) \
static int get_##name(ide_drive_t *drive) \
{ \
	return !!(drive->dev_flags & flag); \
}

#define ide_devset_set_flag(name, flag) \
static int set_##name(ide_drive_t *drive, int arg) \
{ \
	if (arg) \
		drive->dev_flags |= flag; \
	else \
		drive->dev_flags &= ~flag; \
	return 0; \
}

#define __IDE_DEVSET(_name, _flags, _get, _set) \
const struct ide_devset ide_devset_##_name = \
	__DEVSET(_flags, _get, _set)

#define IDE_DEVSET(_name, _flags, _get, _set) \
static __IDE_DEVSET(_name, _flags, _get, _set)

#define ide_devset_rw(_name, _func) \
IDE_DEVSET(_name, 0, get_##_func, set_##_func)

#define ide_devset_w(_name, _func) \
IDE_DEVSET(_name, 0, NULL, set_##_func)

#define ide_ext_devset_rw(_name, _func) \
__IDE_DEVSET(_name, 0, get_##_func, set_##_func)

#define ide_ext_devset_rw_sync(_name, _func) \
__IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)

#define ide_decl_devset(_name) \
extern const struct ide_devset ide_devset_##_name

ide_decl_devset(io_32bit);
ide_decl_devset(keepsettings);
ide_decl_devset(pio_mode);
ide_decl_devset(unmaskirq);
ide_decl_devset(using_dma);

#ifdef CONFIG_IDE_PROC_FS
/*
 * /proc/ide interface
 */

#define ide_devset_rw_field(_name, _field) \
ide_devset_get(_name, _field); \
ide_devset_set(_name, _field); \
IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)

#define ide_devset_rw_flag(_name, _field) \
ide_devset_get_flag(_name, _field); \
ide_devset_set_flag(_name, _field); \
IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)

struct ide_proc_devset {
	const char		*name;
	const struct ide_devset	*setting;
	int			min, max;
	int			(*mulf)(ide_drive_t *);
	int			(*divf)(ide_drive_t *);
};

#define __IDE_PROC_DEVSET(_name, _min, _max, _mulf, _divf) { \
	.name = __stringify(_name), \
	.setting = &ide_devset_##_name, \
	.min = _min, \
	.max = _max, \
	.mulf = _mulf, \
	.divf = _divf, \
}

#define IDE_PROC_DEVSET(_name, _min, _max) \
__IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)

typedef struct {
	const char	*name;
	umode_t		mode;
	const struct file_operations *proc_fops;
} ide_proc_entry_t;

void proc_ide_create(void);
void proc_ide_destroy(void);
void ide_proc_register_port(ide_hwif_t *);
void ide_proc_port_register_devices(ide_hwif_t *);
void ide_proc_unregister_device(ide_drive_t *);
void ide_proc_unregister_port(ide_hwif_t *);
void ide_proc_register_driver(ide_drive_t *, struct ide_driver *);
void ide_proc_unregister_driver(ide_drive_t *, struct ide_driver *);

extern const struct file_operations ide_capacity_proc_fops;
extern const struct file_operations ide_geometry_proc_fops;
#else
static inline void proc_ide_create(void) { ; }
static inline void proc_ide_destroy(void) { ; }
static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
static inline void ide_proc_register_driver(ide_drive_t *drive,
					    struct ide_driver *driver) { ; }
static inline void ide_proc_unregister_driver(ide_drive_t *drive,
					      struct ide_driver *driver) { ; }
#endif

enum {
	/* enter/exit functions */
	IDE_DBG_FUNC =			(1 << 0),
	/* sense key/asc handling */
	IDE_DBG_SENSE =			(1 << 1),
	/* packet commands handling */
	IDE_DBG_PC =			(1 << 2),
	/* request handling */
	IDE_DBG_RQ =			(1 << 3),
	/* driver probing/setup */
	IDE_DBG_PROBE =			(1 << 4),
};

/* DRV_NAME has to be defined in the driver before using the macro below */
#define __ide_debug_log(lvl, fmt, args...)				\
{									\
	if (unlikely(drive->debug_mask & lvl))				\
		printk(KERN_INFO DRV_NAME ": %s: " fmt "\n",		\
					  __func__, ## args);		\
}

/*
 * Power Management state machine (rq->pm->pm_step).
 *
 * For each step, the core calls ide_start_power_step() first.
 * This can return:
 *	- ide_stopped :	In this case, the core calls us back again unless
 *			step have been set to ide_power_state_completed.
 *	- ide_started :	In this case, the channel is left busy until an
 *			async event (interrupt) occurs.
 * Typically, ide_start_power_step() will issue a taskfile request with
 * do_rw_taskfile().
 *
 * Upon reception of the interrupt, the core will call ide_complete_power_step()
 * with the error code if any. This routine should update the step value
 * and return. It should not start a new request. The core will call
 * ide_start_power_step() for the new step value, unless step have been
 * set to IDE_PM_COMPLETED.
 */
enum {
	IDE_PM_START_SUSPEND,
	IDE_PM_FLUSH_CACHE	= IDE_PM_START_SUSPEND,
	IDE_PM_STANDBY,

	IDE_PM_START_RESUME,
	IDE_PM_RESTORE_PIO	= IDE_PM_START_RESUME,
	IDE_PM_IDLE,
	IDE_PM_RESTORE_DMA,

	IDE_PM_COMPLETED,
};

int generic_ide_suspend(struct device *, pm_message_t);
int generic_ide_resume(struct device *);

void ide_complete_power_step(ide_drive_t *, struct request *);
ide_startstop_t ide_start_power_step(ide_drive_t *, struct request *);
void ide_complete_pm_rq(ide_drive_t *, struct request *);
void ide_check_pm_state(ide_drive_t *, struct request *);

/*
 * Subdrivers support.
 *
 * The gendriver.owner field should be set to the module owner of this driver.
 * The gendriver.name field should be set to the name of this driver
 */
struct ide_driver {
	const char			*version;
	ide_startstop_t	(*do_request)(ide_drive_t *, struct request *, sector_t);
	struct device_driver	gen_driver;
	int		(*probe)(ide_drive_t *);
	void		(*remove)(ide_drive_t *);
	void		(*resume)(ide_drive_t *);
	void		(*shutdown)(ide_drive_t *);
#ifdef CONFIG_IDE_PROC_FS
	ide_proc_entry_t *		(*proc_entries)(ide_drive_t *);
	const struct ide_proc_devset *	(*proc_devsets)(ide_drive_t *);
#endif
};

#define to_ide_driver(drv) container_of(drv, struct ide_driver, gen_driver)

int ide_device_get(ide_drive_t *);
void ide_device_put(ide_drive_t *);

struct ide_ioctl_devset {
	unsigned int	get_ioctl;
	unsigned int	set_ioctl;
	const struct ide_devset *setting;
};

int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
		      unsigned long, const struct ide_ioctl_devset *);

int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned long);

extern int ide_vlb_clk;
extern int ide_pci_clk;

int ide_end_rq(ide_drive_t *, struct request *, int, unsigned int);
void ide_kill_rq(ide_drive_t *, struct request *);

void __ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int);
void ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int);

void ide_execute_command(ide_drive_t *, struct ide_cmd *, ide_handler_t *,
			 unsigned int);

void ide_pad_transfer(ide_drive_t *, int, int);

ide_startstop_t ide_error(ide_drive_t *, const char *, u8);

void ide_fix_driveid(u16 *);

extern void ide_fixstring(u8 *, const int, const int);

int ide_busy_sleep(ide_drive_t *, unsigned long, int);

int __ide_wait_stat(ide_drive_t *, u8, u8, unsigned long, u8 *);
int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);

ide_startstop_t ide_do_park_unpark(ide_drive_t *, struct request *);
ide_startstop_t ide_do_devset(ide_drive_t *, struct request *);

extern ide_startstop_t ide_do_reset (ide_drive_t *);

extern int ide_devset_execute(ide_drive_t *drive,
			      const struct ide_devset *setting, int arg);

void ide_complete_cmd(ide_drive_t *, struct ide_cmd *, u8, u8);
int ide_complete_rq(ide_drive_t *, int, unsigned int);

void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd);
void ide_tf_dump(const char *, struct ide_cmd *);

void ide_exec_command(ide_hwif_t *, u8);
u8 ide_read_status(ide_hwif_t *);
u8 ide_read_altstatus(ide_hwif_t *);
void ide_write_devctl(ide_hwif_t *, u8);

void ide_dev_select(ide_drive_t *);
void ide_tf_load(ide_drive_t *, struct ide_taskfile *, u8);
void ide_tf_read(ide_drive_t *, struct ide_taskfile *, u8);

void ide_input_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
void ide_output_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);

void SELECT_MASK(ide_drive_t *, int);

u8 ide_read_error(ide_drive_t *);
void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);

int ide_check_ireason(ide_drive_t *, struct request *, int, int, int);

int ide_check_atapi_device(ide_drive_t *, const char *);

void ide_init_pc(struct ide_atapi_pc *);

/* Disk head parking */
extern wait_queue_head_t ide_park_wq;
ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
		      char *buf);
ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t len);

/*
 * Special requests for ide-tape block device strategy routine.
 *
 * In order to service a character device command, we add special requests to
 * the tail of our block device request queue and wait for their completion.
 */
enum {
	REQ_IDETAPE_PC1		= (1 << 0), /* packet command (first stage) */
	REQ_IDETAPE_PC2		= (1 << 1), /* packet command (second stage) */
	REQ_IDETAPE_READ	= (1 << 2),
	REQ_IDETAPE_WRITE	= (1 << 3),
};

int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
		      void *, unsigned int);

int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
void ide_retry_pc(ide_drive_t *drive);

void ide_prep_sense(ide_drive_t *drive, struct request *rq);
int ide_queue_sense_rq(ide_drive_t *drive, void *special);

int ide_cd_expiry(ide_drive_t *);

int ide_cd_get_xferlen(struct request *);

ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_cmd *);

ide_startstop_t do_rw_taskfile(ide_drive_t *, struct ide_cmd *);

void ide_pio_bytes(ide_drive_t *, struct ide_cmd *, unsigned int, unsigned int);

void ide_finish_cmd(ide_drive_t *, struct ide_cmd *, u8);

int ide_raw_taskfile(ide_drive_t *, struct ide_cmd *, u8 *, u16);
int ide_no_data_taskfile(ide_drive_t *, struct ide_cmd *);

int ide_taskfile_ioctl(ide_drive_t *, unsigned long);

int ide_dev_read_id(ide_drive_t *, u8, u16 *, int);

extern int ide_driveid_update(ide_drive_t *);
extern int ide_config_drive_speed(ide_drive_t *, u8);
extern u8 eighty_ninty_three (ide_drive_t *);
extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);

extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);

extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);

extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id);
extern void do_ide_request(struct request_queue *);
extern void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq);

void ide_init_disk(struct gendisk *, ide_drive_t *);

#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
#define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
#else
#define ide_pci_register_driver(d) pci_register_driver(d)
#endif

static inline int ide_pci_is_in_compatibility_mode(struct pci_dev *dev)
{
	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5)
		return 1;
	return 0;
}

void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *,
			 struct ide_hw *, struct ide_hw **);
void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);

#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
int ide_pci_set_master(struct pci_dev *, const char *);
unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
#else
static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
				     const struct ide_port_info *d)
{
	return -EINVAL;
}
#endif

struct ide_pci_enablebit {
	u8	reg;	/* byte pci reg holding the enable-bit */
	u8	mask;	/* mask to isolate the enable-bit */
	u8	val;	/* value of masked reg when "enabled" */
};

enum {
	/* Uses ISA control ports not PCI ones. */
	IDE_HFLAG_ISA_PORTS		= (1 << 0),
	/* single port device */
	IDE_HFLAG_SINGLE		= (1 << 1),
	/* don't use legacy PIO blacklist */
	IDE_HFLAG_PIO_NO_BLACKLIST	= (1 << 2),
	/* set for the second port of QD65xx */
	IDE_HFLAG_QD_2ND_PORT		= (1 << 3),
	/* use PIO8/9 for prefetch off/on */
	IDE_HFLAG_ABUSE_PREFETCH	= (1 << 4),
	/* use PIO6/7 for fast-devsel off/on */
	IDE_HFLAG_ABUSE_FAST_DEVSEL	= (1 << 5),
	/* use 100-102 and 200-202 PIO values to set DMA modes */
	IDE_HFLAG_ABUSE_DMA_MODES	= (1 << 6),
	/*
	 * keep DMA setting when programming PIO mode, may be used only
	 * for hosts which have separate PIO and DMA timings (ie. PMAC)
	 */
	IDE_HFLAG_SET_PIO_MODE_KEEP_DMA	= (1 << 7),
	/* program host for the transfer mode after programming device */
	IDE_HFLAG_POST_SET_MODE		= (1 << 8),
	/* don't program host/device for the transfer mode ("smart" hosts) */
	IDE_HFLAG_NO_SET_MODE		= (1 << 9),
	/* trust BIOS for programming chipset/device for DMA */
	IDE_HFLAG_TRUST_BIOS_FOR_DMA	= (1 << 10),
	/* host is CS5510/CS5520 */
	IDE_HFLAG_CS5520		= (1 << 11),
	/* ATAPI DMA is unsupported */
	IDE_HFLAG_NO_ATAPI_DMA		= (1 << 12),
	/* set if host is a "non-bootable" controller */
	IDE_HFLAG_NON_BOOTABLE		= (1 << 13),
	/* host doesn't support DMA */
	IDE_HFLAG_NO_DMA		= (1 << 14),
	/* check if host is PCI IDE device before allowing DMA */
	IDE_HFLAG_NO_AUTODMA		= (1 << 15),
	/* host uses MMIO */
	IDE_HFLAG_MMIO			= (1 << 16),
	/* no LBA48 */
	IDE_HFLAG_NO_LBA48		= (1 << 17),
	/* no LBA48 DMA */
	IDE_HFLAG_NO_LBA48_DMA		= (1 << 18),
	/* data FIFO is cleared by an error */
	IDE_HFLAG_ERROR_STOPS_FIFO	= (1 << 19),
	/* serialize ports */
	IDE_HFLAG_SERIALIZE		= (1 << 20),
	/* host is DTC2278 */
	IDE_HFLAG_DTC2278		= (1 << 21),
	/* 4 devices on a single set of I/O ports */
	IDE_HFLAG_4DRIVES		= (1 << 22),
	/* host is TRM290 */
	IDE_HFLAG_TRM290		= (1 << 23),
	/* use 32-bit I/O ops */
	IDE_HFLAG_IO_32BIT		= (1 << 24),
	/* unmask IRQs */
	IDE_HFLAG_UNMASK_IRQS		= (1 << 25),
	IDE_HFLAG_BROKEN_ALTSTATUS	= (1 << 26),
	/* serialize ports if DMA is possible (for sl82c105) */
	IDE_HFLAG_SERIALIZE_DMA		= (1 << 27),
	/* force host out of "simplex" mode */
	IDE_HFLAG_CLEAR_SIMPLEX		= (1 << 28),
	/* DSC overlap is unsupported */
	IDE_HFLAG_NO_DSC		= (1 << 29),
	/* never use 32-bit I/O ops */
	IDE_HFLAG_NO_IO_32BIT		= (1 << 30),
	/* never unmask IRQs */
	IDE_HFLAG_NO_UNMASK_IRQS	= (1 << 31),
};

#ifdef CONFIG_BLK_DEV_OFFBOARD
# define IDE_HFLAG_OFF_BOARD	0
#else
# define IDE_HFLAG_OFF_BOARD	IDE_HFLAG_NON_BOOTABLE
#endif

struct ide_port_info {
	char			*name;

	int			(*init_chipset)(struct pci_dev *);

	void			(*get_lock)(irq_handler_t, void *);
	void			(*release_lock)(void);

	void			(*init_iops)(ide_hwif_t *);
	void                    (*init_hwif)(ide_hwif_t *);
	int			(*init_dma)(ide_hwif_t *,
					    const struct ide_port_info *);

	const struct ide_tp_ops		*tp_ops;
	const struct ide_port_ops	*port_ops;
	const struct ide_dma_ops	*dma_ops;

	struct ide_pci_enablebit	enablebits[2];

	hwif_chipset_t		chipset;

	u16			max_sectors;	/* if < than the default one */

	u32			host_flags;

	int			irq_flags;

	u8			pio_mask;
	u8			swdma_mask;
	u8			mwdma_mask;
	u8			udma_mask;
};

/*
 * State information carried for REQ_TYPE_ATA_PM_SUSPEND and REQ_TYPE_ATA_PM_RESUME
 * requests.
 */
struct ide_pm_state {
	/* PM state machine step value, currently driver specific */
	int	pm_step;
	/* requested PM state value (S1, S2, S3, S4, ...) */
	u32	pm_state;
	void*	data;		/* for driver use */
};


int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
		     const struct ide_port_info *, void *);
void ide_pci_remove(struct pci_dev *);

#ifdef CONFIG_PM
int ide_pci_suspend(struct pci_dev *, pm_message_t);
int ide_pci_resume(struct pci_dev *);
#else
#define ide_pci_suspend NULL
#define ide_pci_resume NULL
#endif

void ide_map_sg(ide_drive_t *, struct ide_cmd *);
void ide_init_sg_cmd(struct ide_cmd *, unsigned int);

#define BAD_DMA_DRIVE		0
#define GOOD_DMA_DRIVE		1

struct drive_list_entry {
	const char *id_model;
	const char *id_firmware;
};

int ide_in_drive_list(u16 *, const struct drive_list_entry *);

#ifdef CONFIG_BLK_DEV_IDEDMA
int ide_dma_good_drive(ide_drive_t *);
int __ide_dma_bad_drive(ide_drive_t *);

u8 ide_find_dma_mode(ide_drive_t *, u8);

static inline u8 ide_max_dma_mode(ide_drive_t *drive)
{
	return ide_find_dma_mode(drive, XFER_UDMA_6);
}

void ide_dma_off_quietly(ide_drive_t *);
void ide_dma_off(ide_drive_t *);
void ide_dma_on(ide_drive_t *);
int ide_set_dma(ide_drive_t *);
void ide_check_dma_crc(ide_drive_t *);
ide_startstop_t ide_dma_intr(ide_drive_t *);

int ide_allocate_dma_engine(ide_hwif_t *);
void ide_release_dma_engine(ide_hwif_t *);

int ide_dma_prepare(ide_drive_t *, struct ide_cmd *);
void ide_dma_unmap_sg(ide_drive_t *, struct ide_cmd *);

#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
int config_drive_for_dma(ide_drive_t *);
int ide_build_dmatable(ide_drive_t *, struct ide_cmd *);
void ide_dma_host_set(ide_drive_t *, int);
int ide_dma_setup(ide_drive_t *, struct ide_cmd *);
extern void ide_dma_start(ide_drive_t *);
int ide_dma_end(ide_drive_t *);
int ide_dma_test_irq(ide_drive_t *);
int ide_dma_sff_timer_expiry(ide_drive_t *);
u8 ide_dma_sff_read_status(ide_hwif_t *);
extern const struct ide_dma_ops sff_dma_ops;
#else
static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */

void ide_dma_lost_irq(ide_drive_t *);
ide_startstop_t ide_dma_timeout_retry(ide_drive_t *, int);

#else
static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
static inline void ide_dma_off(ide_drive_t *drive) { ; }
static inline void ide_dma_on(ide_drive_t *drive) { ; }
static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
static inline ide_startstop_t ide_dma_intr(ide_drive_t *drive) { return ide_stopped; }
static inline ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) { return ide_stopped; }
static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
static inline int ide_dma_prepare(ide_drive_t *drive,
				  struct ide_cmd *cmd) { return 1; }
static inline void ide_dma_unmap_sg(ide_drive_t *drive,
				    struct ide_cmd *cmd) { ; }
#endif /* CONFIG_BLK_DEV_IDEDMA */

#ifdef CONFIG_BLK_DEV_IDEACPI
int ide_acpi_init(void);
bool ide_port_acpi(ide_hwif_t *hwif);
extern int ide_acpi_exec_tfs(ide_drive_t *drive);
extern void ide_acpi_get_timing(ide_hwif_t *hwif);
extern void ide_acpi_push_timing(ide_hwif_t *hwif);
void ide_acpi_init_port(ide_hwif_t *);
void ide_acpi_port_init_devices(ide_hwif_t *);
extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
#else
static inline int ide_acpi_init(void) { return 0; }
static inline bool ide_port_acpi(ide_hwif_t *hwif) { return 0; }
static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_init_port(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
#endif

void ide_register_region(struct gendisk *);
void ide_unregister_region(struct gendisk *);

void ide_check_nien_quirk_list(ide_drive_t *);
void ide_undecoded_slave(ide_drive_t *);

void ide_port_apply_params(ide_hwif_t *);
int ide_sysfs_register_port(ide_hwif_t *);

struct ide_host *ide_host_alloc(const struct ide_port_info *, struct ide_hw **,
				unsigned int);
void ide_host_free(struct ide_host *);
int ide_host_register(struct ide_host *, const struct ide_port_info *,
		      struct ide_hw **);
int ide_host_add(const struct ide_port_info *, struct ide_hw **, unsigned int,
		 struct ide_host **);
void ide_host_remove(struct ide_host *);
int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
void ide_port_unregister_devices(ide_hwif_t *);
void ide_port_scan(ide_hwif_t *);

static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
{
	return hwif->hwif_data;
}

static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
{
	hwif->hwif_data = data;
}

extern void ide_toggle_bounce(ide_drive_t *drive, int on);

u64 ide_get_lba_addr(struct ide_cmd *, int);
u8 ide_dump_status(ide_drive_t *, const char *, u8);

struct ide_timing {
	u8  mode;
	u8  setup;	/* t1 */
	u16 act8b;	/* t2 for 8-bit io */
	u16 rec8b;	/* t2i for 8-bit io */
	u16 cyc8b;	/* t0 for 8-bit io */
	u16 active;	/* t2 or tD */
	u16 recover;	/* t2i or tK */
	u16 cycle;	/* t0 */
	u16 udma;	/* t2CYCTYP/2 */
};

enum {
	IDE_TIMING_SETUP	= (1 << 0),
	IDE_TIMING_ACT8B	= (1 << 1),
	IDE_TIMING_REC8B	= (1 << 2),
	IDE_TIMING_CYC8B	= (1 << 3),
	IDE_TIMING_8BIT		= IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
				  IDE_TIMING_CYC8B,
	IDE_TIMING_ACTIVE	= (1 << 4),
	IDE_TIMING_RECOVER	= (1 << 5),
	IDE_TIMING_CYCLE	= (1 << 6),
	IDE_TIMING_UDMA		= (1 << 7),
	IDE_TIMING_ALL		= IDE_TIMING_SETUP | IDE_TIMING_8BIT |
				  IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
				  IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
};

struct ide_timing *ide_timing_find_mode(u8);
u16 ide_pio_cycle_time(ide_drive_t *, u8);
void ide_timing_merge(struct ide_timing *, struct ide_timing *,
		      struct ide_timing *, unsigned int);
int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);

#ifdef CONFIG_IDE_XFER_MODE
int ide_scan_pio_blacklist(char *);
const char *ide_xfer_verbose(u8);
int ide_pio_need_iordy(ide_drive_t *, const u8);
int ide_set_pio_mode(ide_drive_t *, u8);
int ide_set_dma_mode(ide_drive_t *, u8);
void ide_set_pio(ide_drive_t *, u8);
int ide_set_xfer_rate(ide_drive_t *, u8);
#else
static inline void ide_set_pio(ide_drive_t *drive, u8 pio) { ; }
static inline int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) { return -1; }
#endif

static inline void ide_set_max_pio(ide_drive_t *drive)
{
	ide_set_pio(drive, 255);
}

char *ide_media_string(ide_drive_t *);

extern const struct attribute_group *ide_dev_groups[];
extern struct bus_type ide_bus_type;
extern struct class *ide_port_class;

static inline void ide_dump_identify(u8 *id)
{
	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
}

static inline int hwif_to_node(ide_hwif_t *hwif)
{
	return hwif->dev ? dev_to_node(hwif->dev) : -1;
}

static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
{
	ide_drive_t *peer = drive->hwif->devices[(drive->dn ^ 1) & 1];

	return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
}

static inline void *ide_get_drivedata(ide_drive_t *drive)
{
	return drive->drive_data;
}

static inline void ide_set_drivedata(ide_drive_t *drive, void *data)
{
	drive->drive_data = data;
}

#define ide_port_for_each_dev(i, dev, port) \
	for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++)

#define ide_port_for_each_present_dev(i, dev, port) \
	for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++) \
		if ((dev)->dev_flags & IDE_DFLAG_PRESENT)

#define ide_host_for_each_port(i, port, host) \
	for ((i) = 0; ((port) = (host)->ports[i]) || (i) < MAX_HOST_PORTS; (i)++)


#endif /* _IDE_H */