2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 1998-2002 Linux ATA Development
4 * Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2003 Red Hat
6 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
10 * Mostly written by Mark Lord <mlord@pobox.com>
11 * and Gadi Oxman <gadio@netvision.net.il>
12 * and Andre Hedrick <andre@linux-ide.org>
14 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
17 #include <linux/types.h>
18 #include <linux/string.h>
19 #include <linux/kernel.h>
20 #include <linux/timer.h>
22 #include <linux/interrupt.h>
23 #include <linux/major.h>
24 #include <linux/errno.h>
25 #include <linux/genhd.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
28 #include <linux/mutex.h>
29 #include <linux/leds.h>
30 #include <linux/ide.h>
31 #include <linux/hdreg.h>
33 #include <asm/byteorder.h>
35 #include <asm/uaccess.h>
37 #include <asm/div64.h>
41 static const u8 ide_rw_cmds
[] = {
44 ATA_CMD_READ_MULTI_EXT
,
45 ATA_CMD_WRITE_MULTI_EXT
,
49 ATA_CMD_PIO_WRITE_EXT
,
56 static const u8 ide_data_phases
[] = {
65 static void ide_tf_set_cmd(ide_drive_t
*drive
, ide_task_t
*task
, u8 dma
)
67 u8 index
, lba48
, write
;
69 lba48
= (task
->tf_flags
& IDE_TFLAG_LBA48
) ? 2 : 0;
70 write
= (task
->tf_flags
& IDE_TFLAG_WRITE
) ? 1 : 0;
75 index
= drive
->mult_count
? 0 : 4;
77 task
->tf
.command
= ide_rw_cmds
[index
+ lba48
+ write
];
80 index
= 8; /* fixup index */
82 task
->data_phase
= ide_data_phases
[index
/ 2 + write
];
86 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
87 * using LBA if supported, or CHS otherwise, to address sectors.
89 static ide_startstop_t
__ide_do_rw_disk(ide_drive_t
*drive
, struct request
*rq
,
92 ide_hwif_t
*hwif
= drive
->hwif
;
93 u16 nsectors
= (u16
)rq
->nr_sectors
;
94 u8 lba48
= !!(drive
->dev_flags
& IDE_DFLAG_LBA48
);
95 u8 dma
= !!(drive
->dev_flags
& IDE_DFLAG_USING_DMA
);
97 struct ide_taskfile
*tf
= &task
.tf
;
100 if ((hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
) && lba48
&& dma
) {
101 if (block
+ rq
->nr_sectors
> 1ULL << 28)
108 ide_init_sg_cmd(drive
, rq
);
109 ide_map_sg(drive
, rq
);
112 memset(&task
, 0, sizeof(task
));
113 task
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
115 if (drive
->dev_flags
& IDE_DFLAG_LBA
) {
117 pr_debug("%s: LBA=0x%012llx\n", drive
->name
,
118 (unsigned long long)block
);
120 tf
->hob_nsect
= (nsectors
>> 8) & 0xff;
121 tf
->hob_lbal
= (u8
)(block
>> 24);
122 if (sizeof(block
) != 4) {
123 tf
->hob_lbam
= (u8
)((u64
)block
>> 32);
124 tf
->hob_lbah
= (u8
)((u64
)block
>> 40);
127 tf
->nsect
= nsectors
& 0xff;
128 tf
->lbal
= (u8
) block
;
129 tf
->lbam
= (u8
)(block
>> 8);
130 tf
->lbah
= (u8
)(block
>> 16);
132 task
.tf_flags
|= (IDE_TFLAG_LBA48
| IDE_TFLAG_HOB
);
134 tf
->nsect
= nsectors
& 0xff;
136 tf
->lbam
= block
>>= 8;
137 tf
->lbah
= block
>>= 8;
138 tf
->device
= (block
>> 8) & 0xf;
141 tf
->device
|= ATA_LBA
;
143 unsigned int sect
, head
, cyl
, track
;
145 track
= (int)block
/ drive
->sect
;
146 sect
= (int)block
% drive
->sect
+ 1;
147 head
= track
% drive
->head
;
148 cyl
= track
/ drive
->head
;
150 pr_debug("%s: CHS=%u/%u/%u\n", drive
->name
, cyl
, head
, sect
);
152 tf
->nsect
= nsectors
& 0xff;
160 task
.tf_flags
|= IDE_TFLAG_WRITE
;
162 ide_tf_set_cmd(drive
, &task
, dma
);
165 rc
= do_rw_taskfile(drive
, &task
);
167 if (rc
== ide_stopped
&& dma
) {
168 /* fallback to PIO */
169 task
.tf_flags
|= IDE_TFLAG_DMA_PIO_FALLBACK
;
170 ide_tf_set_cmd(drive
, &task
, 0);
171 ide_init_sg_cmd(drive
, rq
);
172 rc
= do_rw_taskfile(drive
, &task
);
179 * 268435455 == 137439 MB or 28bit limit
180 * 320173056 == 163929 MB or 48bit addressing
181 * 1073741822 == 549756 MB or 48bit addressing fake drive
184 static ide_startstop_t
ide_do_rw_disk(ide_drive_t
*drive
, struct request
*rq
,
187 ide_hwif_t
*hwif
= drive
->hwif
;
189 BUG_ON(drive
->dev_flags
& IDE_DFLAG_BLOCKED
);
191 if (!blk_fs_request(rq
)) {
192 blk_dump_rq_flags(rq
, "ide_do_rw_disk - bad command");
193 ide_end_request(drive
, 0, 0);
197 ledtrig_ide_activity();
199 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
200 drive
->name
, rq_data_dir(rq
) == READ
? "read" : "writ",
201 (unsigned long long)block
, rq
->nr_sectors
,
202 (unsigned long)rq
->buffer
);
205 hwif
->rw_disk(drive
, rq
);
207 return __ide_do_rw_disk(drive
, rq
, block
);
211 * Queries for true maximum capacity of the drive.
212 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
214 static u64
idedisk_read_native_max_address(ide_drive_t
*drive
, int lba48
)
217 struct ide_taskfile
*tf
= &args
.tf
;
220 /* Create IDE/ATA command request structure */
221 memset(&args
, 0, sizeof(ide_task_t
));
223 tf
->command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
225 tf
->command
= ATA_CMD_READ_NATIVE_MAX
;
226 tf
->device
= ATA_LBA
;
227 args
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
229 args
.tf_flags
|= (IDE_TFLAG_LBA48
| IDE_TFLAG_HOB
);
230 /* submit command request */
231 ide_no_data_taskfile(drive
, &args
);
233 /* if OK, compute maximum address value */
234 if ((tf
->status
& 0x01) == 0)
235 addr
= ide_get_lba_addr(tf
, lba48
) + 1;
241 * Sets maximum virtual LBA address of the drive.
242 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
244 static u64
idedisk_set_max_address(ide_drive_t
*drive
, u64 addr_req
, int lba48
)
247 struct ide_taskfile
*tf
= &args
.tf
;
251 /* Create IDE/ATA command request structure */
252 memset(&args
, 0, sizeof(ide_task_t
));
253 tf
->lbal
= (addr_req
>> 0) & 0xff;
254 tf
->lbam
= (addr_req
>>= 8) & 0xff;
255 tf
->lbah
= (addr_req
>>= 8) & 0xff;
257 tf
->hob_lbal
= (addr_req
>>= 8) & 0xff;
258 tf
->hob_lbam
= (addr_req
>>= 8) & 0xff;
259 tf
->hob_lbah
= (addr_req
>>= 8) & 0xff;
260 tf
->command
= ATA_CMD_SET_MAX_EXT
;
262 tf
->device
= (addr_req
>>= 8) & 0x0f;
263 tf
->command
= ATA_CMD_SET_MAX
;
265 tf
->device
|= ATA_LBA
;
266 args
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
268 args
.tf_flags
|= (IDE_TFLAG_LBA48
| IDE_TFLAG_HOB
);
269 /* submit command request */
270 ide_no_data_taskfile(drive
, &args
);
271 /* if OK, compute maximum address value */
272 if ((tf
->status
& 0x01) == 0)
273 addr_set
= ide_get_lba_addr(tf
, lba48
) + 1;
278 static unsigned long long sectors_to_MB(unsigned long long n
)
280 n
<<= 9; /* make it bytes */
281 do_div(n
, 1000000); /* make it MB */
286 * Some disks report total number of sectors instead of
287 * maximum sector address. We list them here.
289 static const struct drive_list_entry hpa_list
[] = {
290 { "ST340823A", NULL
},
291 { "ST320413A", NULL
},
292 { "ST310211A", NULL
},
296 static void idedisk_check_hpa(ide_drive_t
*drive
)
298 unsigned long long capacity
, set_max
;
299 int lba48
= ata_id_lba48_enabled(drive
->id
);
301 capacity
= drive
->capacity64
;
303 set_max
= idedisk_read_native_max_address(drive
, lba48
);
305 if (ide_in_drive_list(drive
->id
, hpa_list
)) {
307 * Since we are inclusive wrt to firmware revisions do this
308 * extra check and apply the workaround only when needed.
310 if (set_max
== capacity
+ 1)
314 if (set_max
<= capacity
)
317 printk(KERN_INFO
"%s: Host Protected Area detected.\n"
318 "\tcurrent capacity is %llu sectors (%llu MB)\n"
319 "\tnative capacity is %llu sectors (%llu MB)\n",
321 capacity
, sectors_to_MB(capacity
),
322 set_max
, sectors_to_MB(set_max
));
324 set_max
= idedisk_set_max_address(drive
, set_max
, lba48
);
327 drive
->capacity64
= set_max
;
328 printk(KERN_INFO
"%s: Host Protected Area disabled.\n",
333 static int ide_disk_get_capacity(ide_drive_t
*drive
)
338 if (ata_id_lba48_enabled(id
)) {
339 /* drive speaks 48-bit LBA */
341 drive
->capacity64
= ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
342 } else if (ata_id_has_lba(id
) && ata_id_is_lba_capacity_ok(id
)) {
343 /* drive speaks 28-bit LBA */
345 drive
->capacity64
= ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
347 /* drive speaks boring old 28-bit CHS */
349 drive
->capacity64
= drive
->cyl
* drive
->head
* drive
->sect
;
353 drive
->dev_flags
|= IDE_DFLAG_LBA
;
356 * If this device supports the Host Protected Area feature set,
357 * then we may need to change our opinion about its capacity.
359 if (ata_id_hpa_enabled(id
))
360 idedisk_check_hpa(drive
);
363 /* limit drive capacity to 137GB if LBA48 cannot be used */
364 if ((drive
->dev_flags
& IDE_DFLAG_LBA48
) == 0 &&
365 drive
->capacity64
> 1ULL << 28) {
366 printk(KERN_WARNING
"%s: cannot use LBA48 - full capacity "
367 "%llu sectors (%llu MB)\n",
368 drive
->name
, (unsigned long long)drive
->capacity64
,
369 sectors_to_MB(drive
->capacity64
));
370 drive
->capacity64
= 1ULL << 28;
373 if ((drive
->hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
) &&
374 (drive
->dev_flags
& IDE_DFLAG_LBA48
)) {
375 if (drive
->capacity64
> 1ULL << 28) {
376 printk(KERN_INFO
"%s: cannot use LBA48 DMA - PIO mode"
377 " will be used for accessing sectors "
378 "> %u\n", drive
->name
, 1 << 28);
380 drive
->dev_flags
&= ~IDE_DFLAG_LBA48
;
386 static void idedisk_prepare_flush(struct request_queue
*q
, struct request
*rq
)
388 ide_drive_t
*drive
= q
->queuedata
;
389 ide_task_t
*task
= kmalloc(sizeof(*task
), GFP_ATOMIC
);
391 /* FIXME: map struct ide_taskfile on rq->cmd[] */
392 BUG_ON(task
== NULL
);
394 memset(task
, 0, sizeof(*task
));
395 if (ata_id_flush_ext_enabled(drive
->id
) &&
396 (drive
->capacity64
>= (1UL << 28)))
397 task
->tf
.command
= ATA_CMD_FLUSH_EXT
;
399 task
->tf
.command
= ATA_CMD_FLUSH
;
400 task
->tf_flags
= IDE_TFLAG_OUT_TF
| IDE_TFLAG_OUT_DEVICE
|
402 task
->data_phase
= TASKFILE_NO_DATA
;
404 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
405 rq
->cmd_flags
|= REQ_SOFTBARRIER
;
409 ide_devset_get(multcount
, mult_count
);
412 * This is tightly woven into the driver->do_special can not touch.
413 * DON'T do it again until a total personality rewrite is committed.
415 static int set_multcount(ide_drive_t
*drive
, int arg
)
420 if (arg
< 0 || arg
> (drive
->id
[ATA_ID_MAX_MULTSECT
] & 0xff))
423 if (drive
->special
.b
.set_multmode
)
426 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
427 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
429 drive
->mult_req
= arg
;
430 drive
->special
.b
.set_multmode
= 1;
431 error
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
434 return (drive
->mult_count
== arg
) ? 0 : -EIO
;
437 ide_devset_get_flag(nowerr
, IDE_DFLAG_NOWERR
);
439 static int set_nowerr(ide_drive_t
*drive
, int arg
)
441 if (arg
< 0 || arg
> 1)
445 drive
->dev_flags
|= IDE_DFLAG_NOWERR
;
447 drive
->dev_flags
&= ~IDE_DFLAG_NOWERR
;
449 drive
->bad_wstat
= arg
? BAD_R_STAT
: BAD_W_STAT
;
454 static int ide_do_setfeature(ide_drive_t
*drive
, u8 feature
, u8 nsect
)
458 memset(&task
, 0, sizeof(task
));
459 task
.tf
.feature
= feature
;
460 task
.tf
.nsect
= nsect
;
461 task
.tf
.command
= ATA_CMD_SET_FEATURES
;
462 task
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
464 return ide_no_data_taskfile(drive
, &task
);
467 static void update_ordered(ide_drive_t
*drive
)
470 unsigned ordered
= QUEUE_ORDERED_NONE
;
471 prepare_flush_fn
*prep_fn
= NULL
;
473 if (drive
->dev_flags
& IDE_DFLAG_WCACHE
) {
474 unsigned long long capacity
;
477 * We must avoid issuing commands a drive does not
478 * understand or we may crash it. We check flush cache
479 * is supported. We also check we have the LBA48 flush
480 * cache if the drive capacity is too large. By this
481 * time we have trimmed the drive capacity if LBA48 is
482 * not available so we don't need to recheck that.
484 capacity
= ide_gd_capacity(drive
);
485 barrier
= ata_id_flush_enabled(id
) &&
486 (drive
->dev_flags
& IDE_DFLAG_NOFLUSH
) == 0 &&
487 ((drive
->dev_flags
& IDE_DFLAG_LBA48
) == 0 ||
488 capacity
<= (1ULL << 28) ||
489 ata_id_flush_ext_enabled(id
));
491 printk(KERN_INFO
"%s: cache flushes %ssupported\n",
492 drive
->name
, barrier
? "" : "not ");
495 ordered
= QUEUE_ORDERED_DRAIN_FLUSH
;
496 prep_fn
= idedisk_prepare_flush
;
499 ordered
= QUEUE_ORDERED_DRAIN
;
501 blk_queue_ordered(drive
->queue
, ordered
, prep_fn
);
504 ide_devset_get_flag(wcache
, IDE_DFLAG_WCACHE
);
506 static int set_wcache(ide_drive_t
*drive
, int arg
)
510 if (arg
< 0 || arg
> 1)
513 if (ata_id_flush_enabled(drive
->id
)) {
514 err
= ide_do_setfeature(drive
,
515 arg
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
, 0);
518 drive
->dev_flags
|= IDE_DFLAG_WCACHE
;
520 drive
->dev_flags
&= ~IDE_DFLAG_WCACHE
;
524 update_ordered(drive
);
529 static int do_idedisk_flushcache(ide_drive_t
*drive
)
533 memset(&args
, 0, sizeof(ide_task_t
));
534 if (ata_id_flush_ext_enabled(drive
->id
))
535 args
.tf
.command
= ATA_CMD_FLUSH_EXT
;
537 args
.tf
.command
= ATA_CMD_FLUSH
;
538 args
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
539 return ide_no_data_taskfile(drive
, &args
);
542 ide_devset_get(acoustic
, acoustic
);
544 static int set_acoustic(ide_drive_t
*drive
, int arg
)
546 if (arg
< 0 || arg
> 254)
549 ide_do_setfeature(drive
,
550 arg
? SETFEATURES_AAM_ON
: SETFEATURES_AAM_OFF
, arg
);
552 drive
->acoustic
= arg
;
557 ide_devset_get_flag(addressing
, IDE_DFLAG_LBA48
);
563 * 2: 48-bit capable doing 28-bit
565 static int set_addressing(ide_drive_t
*drive
, int arg
)
567 if (arg
< 0 || arg
> 2)
570 if (arg
&& ((drive
->hwif
->host_flags
& IDE_HFLAG_NO_LBA48
) ||
571 ata_id_lba48_enabled(drive
->id
) == 0))
578 drive
->dev_flags
|= IDE_DFLAG_LBA48
;
580 drive
->dev_flags
&= ~IDE_DFLAG_LBA48
;
585 ide_ext_devset_rw(acoustic
, acoustic
);
586 ide_ext_devset_rw(address
, addressing
);
587 ide_ext_devset_rw(multcount
, multcount
);
588 ide_ext_devset_rw(wcache
, wcache
);
590 ide_ext_devset_rw_sync(nowerr
, nowerr
);
592 static int ide_disk_check(ide_drive_t
*drive
, const char *s
)
597 static void ide_disk_setup(ide_drive_t
*drive
)
599 struct ide_disk_obj
*idkp
= drive
->driver_data
;
600 struct request_queue
*q
= drive
->queue
;
601 ide_hwif_t
*hwif
= drive
->hwif
;
603 char *m
= (char *)&id
[ATA_ID_PROD
];
604 unsigned long long capacity
;
606 ide_proc_register_driver(drive
, idkp
->driver
);
608 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0)
611 if (drive
->dev_flags
& IDE_DFLAG_REMOVABLE
) {
613 * Removable disks (eg. SYQUEST); ignore 'WD' drives
615 if (m
[0] != 'W' || m
[1] != 'D')
616 drive
->dev_flags
|= IDE_DFLAG_DOORLOCKING
;
619 (void)set_addressing(drive
, 1);
621 if (drive
->dev_flags
& IDE_DFLAG_LBA48
) {
624 if (max_s
> hwif
->rqsize
)
625 max_s
= hwif
->rqsize
;
627 blk_queue_max_sectors(q
, max_s
);
630 printk(KERN_INFO
"%s: max request size: %dKiB\n", drive
->name
,
633 if (ata_id_is_ssd(id
))
634 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
, q
);
636 /* calculate drive capacity, and select LBA if possible */
637 ide_disk_get_capacity(drive
);
640 * if possible, give fdisk access to more of the drive,
641 * by correcting bios_cyls:
643 capacity
= ide_gd_capacity(drive
);
645 if ((drive
->dev_flags
& IDE_DFLAG_FORCED_GEOM
) == 0) {
646 if (ata_id_lba48_enabled(drive
->id
)) {
648 drive
->bios_sect
= 63;
649 drive
->bios_head
= 255;
652 if (drive
->bios_sect
&& drive
->bios_head
) {
653 unsigned int cap0
= capacity
; /* truncate to 32 bits */
654 unsigned int cylsz
, cyl
;
656 if (cap0
!= capacity
)
657 drive
->bios_cyl
= 65535;
659 cylsz
= drive
->bios_sect
* drive
->bios_head
;
663 if (cyl
> drive
->bios_cyl
)
664 drive
->bios_cyl
= cyl
;
668 printk(KERN_INFO
"%s: %llu sectors (%llu MB)",
669 drive
->name
, capacity
, sectors_to_MB(capacity
));
671 /* Only print cache size when it was specified */
672 if (id
[ATA_ID_BUF_SIZE
])
673 printk(KERN_CONT
" w/%dKiB Cache", id
[ATA_ID_BUF_SIZE
] / 2);
675 printk(KERN_CONT
", CHS=%d/%d/%d\n",
676 drive
->bios_cyl
, drive
->bios_head
, drive
->bios_sect
);
678 /* write cache enabled? */
679 if ((id
[ATA_ID_CSFO
] & 1) || ata_id_wcache_enabled(id
))
680 drive
->dev_flags
|= IDE_DFLAG_WCACHE
;
682 set_wcache(drive
, 1);
684 if ((drive
->dev_flags
& IDE_DFLAG_LBA
) == 0 &&
685 (drive
->head
== 0 || drive
->head
> 16)) {
686 printk(KERN_ERR
"%s: invalid geometry: %d physical heads?\n",
687 drive
->name
, drive
->head
);
688 drive
->dev_flags
&= ~IDE_DFLAG_ATTACH
;
690 drive
->dev_flags
|= IDE_DFLAG_ATTACH
;
693 static void ide_disk_flush(ide_drive_t
*drive
)
695 if (ata_id_flush_enabled(drive
->id
) == 0 ||
696 (drive
->dev_flags
& IDE_DFLAG_WCACHE
) == 0)
699 if (do_idedisk_flushcache(drive
))
700 printk(KERN_INFO
"%s: wcache flush failed!\n", drive
->name
);
703 static int ide_disk_init_media(ide_drive_t
*drive
, struct gendisk
*disk
)
708 static int ide_disk_set_doorlock(ide_drive_t
*drive
, struct gendisk
*disk
,
714 if ((drive
->dev_flags
& IDE_DFLAG_DOORLOCKING
) == 0)
717 memset(&task
, 0, sizeof(task
));
718 task
.tf
.command
= on
? ATA_CMD_MEDIA_LOCK
: ATA_CMD_MEDIA_UNLOCK
;
719 task
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
721 ret
= ide_no_data_taskfile(drive
, &task
);
724 drive
->dev_flags
&= ~IDE_DFLAG_DOORLOCKING
;
729 const struct ide_disk_ops ide_ata_disk_ops
= {
730 .check
= ide_disk_check
,
731 .get_capacity
= ide_disk_get_capacity
,
732 .setup
= ide_disk_setup
,
733 .flush
= ide_disk_flush
,
734 .init_media
= ide_disk_init_media
,
735 .set_doorlock
= ide_disk_set_doorlock
,
736 .do_request
= ide_do_rw_disk
,
737 .ioctl
= ide_disk_ioctl
,