2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
52 #include <scsi/scsi.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_host.h>
55 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
62 #define DRV_VERSION "2.10" /* must be exactly four chars */
65 /* debounce timing parameters in msecs { interval, duration, timeout } */
66 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
67 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
68 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
70 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
71 u16 heads
, u16 sectors
);
72 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
75 static unsigned int ata_print_id
= 1;
76 static struct workqueue_struct
*ata_wq
;
78 struct workqueue_struct
*ata_aux_wq
;
80 int atapi_enabled
= 1;
81 module_param(atapi_enabled
, int, 0444);
82 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
85 module_param(atapi_dmadir
, int, 0444);
86 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 module_param_named(fua
, libata_fua
, int, 0444);
90 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
92 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
93 module_param(ata_probe_timeout
, int, 0444);
94 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
97 module_param(noacpi
, int, 0444);
98 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
100 MODULE_AUTHOR("Jeff Garzik");
101 MODULE_DESCRIPTION("Library module for ATA devices");
102 MODULE_LICENSE("GPL");
103 MODULE_VERSION(DRV_VERSION
);
107 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
108 * @tf: Taskfile to convert
109 * @fis: Buffer into which data will output
110 * @pmp: Port multiplier port
112 * Converts a standard ATA taskfile to a Serial ATA
113 * FIS structure (Register - Host to Device).
116 * Inherited from caller.
119 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
121 fis
[0] = 0x27; /* Register - Host to Device FIS */
122 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
123 bit 7 indicates Command FIS */
124 fis
[2] = tf
->command
;
125 fis
[3] = tf
->feature
;
132 fis
[8] = tf
->hob_lbal
;
133 fis
[9] = tf
->hob_lbam
;
134 fis
[10] = tf
->hob_lbah
;
135 fis
[11] = tf
->hob_feature
;
138 fis
[13] = tf
->hob_nsect
;
149 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
150 * @fis: Buffer from which data will be input
151 * @tf: Taskfile to output
153 * Converts a serial ATA FIS structure to a standard ATA taskfile.
156 * Inherited from caller.
159 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
161 tf
->command
= fis
[2]; /* status */
162 tf
->feature
= fis
[3]; /* error */
169 tf
->hob_lbal
= fis
[8];
170 tf
->hob_lbam
= fis
[9];
171 tf
->hob_lbah
= fis
[10];
174 tf
->hob_nsect
= fis
[13];
177 static const u8 ata_rw_cmds
[] = {
181 ATA_CMD_READ_MULTI_EXT
,
182 ATA_CMD_WRITE_MULTI_EXT
,
186 ATA_CMD_WRITE_MULTI_FUA_EXT
,
190 ATA_CMD_PIO_READ_EXT
,
191 ATA_CMD_PIO_WRITE_EXT
,
204 ATA_CMD_WRITE_FUA_EXT
208 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
209 * @tf: command to examine and configure
210 * @dev: device tf belongs to
212 * Examine the device configuration and tf->flags to calculate
213 * the proper read/write commands and protocol to use.
218 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
222 int index
, fua
, lba48
, write
;
224 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
225 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
226 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
228 if (dev
->flags
& ATA_DFLAG_PIO
) {
229 tf
->protocol
= ATA_PROT_PIO
;
230 index
= dev
->multi_count
? 0 : 8;
231 } else if (lba48
&& (dev
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
232 /* Unable to use DMA due to host limitation */
233 tf
->protocol
= ATA_PROT_PIO
;
234 index
= dev
->multi_count
? 0 : 8;
236 tf
->protocol
= ATA_PROT_DMA
;
240 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
249 * ata_tf_read_block - Read block address from ATA taskfile
250 * @tf: ATA taskfile of interest
251 * @dev: ATA device @tf belongs to
256 * Read block address from @tf. This function can handle all
257 * three address formats - LBA, LBA48 and CHS. tf->protocol and
258 * flags select the address format to use.
261 * Block address read from @tf.
263 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
267 if (tf
->flags
& ATA_TFLAG_LBA
) {
268 if (tf
->flags
& ATA_TFLAG_LBA48
) {
269 block
|= (u64
)tf
->hob_lbah
<< 40;
270 block
|= (u64
)tf
->hob_lbam
<< 32;
271 block
|= tf
->hob_lbal
<< 24;
273 block
|= (tf
->device
& 0xf) << 24;
275 block
|= tf
->lbah
<< 16;
276 block
|= tf
->lbam
<< 8;
281 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
282 head
= tf
->device
& 0xf;
285 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
292 * ata_build_rw_tf - Build ATA taskfile for given read/write request
293 * @tf: Target ATA taskfile
294 * @dev: ATA device @tf belongs to
295 * @block: Block address
296 * @n_block: Number of blocks
297 * @tf_flags: RW/FUA etc...
303 * Build ATA taskfile @tf for read/write request described by
304 * @block, @n_block, @tf_flags and @tag on @dev.
308 * 0 on success, -ERANGE if the request is too large for @dev,
309 * -EINVAL if the request is invalid.
311 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
312 u64 block
, u32 n_block
, unsigned int tf_flags
,
315 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
316 tf
->flags
|= tf_flags
;
318 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
320 if (!lba_48_ok(block
, n_block
))
323 tf
->protocol
= ATA_PROT_NCQ
;
324 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
326 if (tf
->flags
& ATA_TFLAG_WRITE
)
327 tf
->command
= ATA_CMD_FPDMA_WRITE
;
329 tf
->command
= ATA_CMD_FPDMA_READ
;
331 tf
->nsect
= tag
<< 3;
332 tf
->hob_feature
= (n_block
>> 8) & 0xff;
333 tf
->feature
= n_block
& 0xff;
335 tf
->hob_lbah
= (block
>> 40) & 0xff;
336 tf
->hob_lbam
= (block
>> 32) & 0xff;
337 tf
->hob_lbal
= (block
>> 24) & 0xff;
338 tf
->lbah
= (block
>> 16) & 0xff;
339 tf
->lbam
= (block
>> 8) & 0xff;
340 tf
->lbal
= block
& 0xff;
343 if (tf
->flags
& ATA_TFLAG_FUA
)
344 tf
->device
|= 1 << 7;
345 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
346 tf
->flags
|= ATA_TFLAG_LBA
;
348 if (lba_28_ok(block
, n_block
)) {
350 tf
->device
|= (block
>> 24) & 0xf;
351 } else if (lba_48_ok(block
, n_block
)) {
352 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
356 tf
->flags
|= ATA_TFLAG_LBA48
;
358 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
360 tf
->hob_lbah
= (block
>> 40) & 0xff;
361 tf
->hob_lbam
= (block
>> 32) & 0xff;
362 tf
->hob_lbal
= (block
>> 24) & 0xff;
364 /* request too large even for LBA48 */
367 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
370 tf
->nsect
= n_block
& 0xff;
372 tf
->lbah
= (block
>> 16) & 0xff;
373 tf
->lbam
= (block
>> 8) & 0xff;
374 tf
->lbal
= block
& 0xff;
376 tf
->device
|= ATA_LBA
;
379 u32 sect
, head
, cyl
, track
;
381 /* The request -may- be too large for CHS addressing. */
382 if (!lba_28_ok(block
, n_block
))
385 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
388 /* Convert LBA to CHS */
389 track
= (u32
)block
/ dev
->sectors
;
390 cyl
= track
/ dev
->heads
;
391 head
= track
% dev
->heads
;
392 sect
= (u32
)block
% dev
->sectors
+ 1;
394 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
395 (u32
)block
, track
, cyl
, head
, sect
);
397 /* Check whether the converted CHS can fit.
401 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
404 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
415 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
416 * @pio_mask: pio_mask
417 * @mwdma_mask: mwdma_mask
418 * @udma_mask: udma_mask
420 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
421 * unsigned int xfer_mask.
429 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
430 unsigned int mwdma_mask
,
431 unsigned int udma_mask
)
433 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
434 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
435 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
439 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
440 * @xfer_mask: xfer_mask to unpack
441 * @pio_mask: resulting pio_mask
442 * @mwdma_mask: resulting mwdma_mask
443 * @udma_mask: resulting udma_mask
445 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
446 * Any NULL distination masks will be ignored.
448 static void ata_unpack_xfermask(unsigned int xfer_mask
,
449 unsigned int *pio_mask
,
450 unsigned int *mwdma_mask
,
451 unsigned int *udma_mask
)
454 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
456 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
458 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
461 static const struct ata_xfer_ent
{
465 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
466 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
467 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
472 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
473 * @xfer_mask: xfer_mask of interest
475 * Return matching XFER_* value for @xfer_mask. Only the highest
476 * bit of @xfer_mask is considered.
482 * Matching XFER_* value, 0 if no match found.
484 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
486 int highbit
= fls(xfer_mask
) - 1;
487 const struct ata_xfer_ent
*ent
;
489 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
490 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
491 return ent
->base
+ highbit
- ent
->shift
;
496 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
497 * @xfer_mode: XFER_* of interest
499 * Return matching xfer_mask for @xfer_mode.
505 * Matching xfer_mask, 0 if no match found.
507 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
509 const struct ata_xfer_ent
*ent
;
511 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
512 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
513 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
518 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
519 * @xfer_mode: XFER_* of interest
521 * Return matching xfer_shift for @xfer_mode.
527 * Matching xfer_shift, -1 if no match found.
529 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
531 const struct ata_xfer_ent
*ent
;
533 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
534 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
540 * ata_mode_string - convert xfer_mask to string
541 * @xfer_mask: mask of bits supported; only highest bit counts.
543 * Determine string which represents the highest speed
544 * (highest bit in @modemask).
550 * Constant C string representing highest speed listed in
551 * @mode_mask, or the constant C string "<n/a>".
553 static const char *ata_mode_string(unsigned int xfer_mask
)
555 static const char * const xfer_mode_str
[] = {
579 highbit
= fls(xfer_mask
) - 1;
580 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
581 return xfer_mode_str
[highbit
];
585 static const char *sata_spd_string(unsigned int spd
)
587 static const char * const spd_str
[] = {
592 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
594 return spd_str
[spd
- 1];
597 void ata_dev_disable(struct ata_device
*dev
)
599 if (ata_dev_enabled(dev
) && ata_msg_drv(dev
->ap
)) {
600 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
601 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
608 * ata_devchk - PATA device presence detection
609 * @ap: ATA channel to examine
610 * @device: Device to examine (starting at zero)
612 * This technique was originally described in
613 * Hale Landis's ATADRVR (www.ata-atapi.com), and
614 * later found its way into the ATA/ATAPI spec.
616 * Write a pattern to the ATA shadow registers,
617 * and if a device is present, it will respond by
618 * correctly storing and echoing back the
619 * ATA shadow register contents.
625 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
627 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
630 ap
->ops
->dev_select(ap
, device
);
632 iowrite8(0x55, ioaddr
->nsect_addr
);
633 iowrite8(0xaa, ioaddr
->lbal_addr
);
635 iowrite8(0xaa, ioaddr
->nsect_addr
);
636 iowrite8(0x55, ioaddr
->lbal_addr
);
638 iowrite8(0x55, ioaddr
->nsect_addr
);
639 iowrite8(0xaa, ioaddr
->lbal_addr
);
641 nsect
= ioread8(ioaddr
->nsect_addr
);
642 lbal
= ioread8(ioaddr
->lbal_addr
);
644 if ((nsect
== 0x55) && (lbal
== 0xaa))
645 return 1; /* we found a device */
647 return 0; /* nothing found */
651 * ata_dev_classify - determine device type based on ATA-spec signature
652 * @tf: ATA taskfile register set for device to be identified
654 * Determine from taskfile register contents whether a device is
655 * ATA or ATAPI, as per "Signature and persistence" section
656 * of ATA/PI spec (volume 1, sect 5.14).
662 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
663 * the event of failure.
666 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
668 /* Apple's open source Darwin code hints that some devices only
669 * put a proper signature into the LBA mid/high registers,
670 * So, we only check those. It's sufficient for uniqueness.
673 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
674 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
675 DPRINTK("found ATA device by sig\n");
679 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
680 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
681 DPRINTK("found ATAPI device by sig\n");
682 return ATA_DEV_ATAPI
;
685 DPRINTK("unknown device\n");
686 return ATA_DEV_UNKNOWN
;
690 * ata_dev_try_classify - Parse returned ATA device signature
691 * @ap: ATA channel to examine
692 * @device: Device to examine (starting at zero)
693 * @r_err: Value of error register on completion
695 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
696 * an ATA/ATAPI-defined set of values is placed in the ATA
697 * shadow registers, indicating the results of device detection
700 * Select the ATA device, and read the values from the ATA shadow
701 * registers. Then parse according to the Error register value,
702 * and the spec-defined values examined by ata_dev_classify().
708 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
712 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
714 struct ata_taskfile tf
;
718 ap
->ops
->dev_select(ap
, device
);
720 memset(&tf
, 0, sizeof(tf
));
722 ap
->ops
->tf_read(ap
, &tf
);
727 /* see if device passed diags: if master then continue and warn later */
728 if (err
== 0 && device
== 0)
729 /* diagnostic fail : do nothing _YET_ */
730 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
733 else if ((device
== 0) && (err
== 0x81))
738 /* determine if device is ATA or ATAPI */
739 class = ata_dev_classify(&tf
);
741 if (class == ATA_DEV_UNKNOWN
)
743 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
749 * ata_id_string - Convert IDENTIFY DEVICE page into string
750 * @id: IDENTIFY DEVICE results we will examine
751 * @s: string into which data is output
752 * @ofs: offset into identify device page
753 * @len: length of string to return. must be an even number.
755 * The strings in the IDENTIFY DEVICE page are broken up into
756 * 16-bit chunks. Run through the string, and output each
757 * 8-bit chunk linearly, regardless of platform.
763 void ata_id_string(const u16
*id
, unsigned char *s
,
764 unsigned int ofs
, unsigned int len
)
783 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
784 * @id: IDENTIFY DEVICE results we will examine
785 * @s: string into which data is output
786 * @ofs: offset into identify device page
787 * @len: length of string to return. must be an odd number.
789 * This function is identical to ata_id_string except that it
790 * trims trailing spaces and terminates the resulting string with
791 * null. @len must be actual maximum length (even number) + 1.
796 void ata_id_c_string(const u16
*id
, unsigned char *s
,
797 unsigned int ofs
, unsigned int len
)
803 ata_id_string(id
, s
, ofs
, len
- 1);
805 p
= s
+ strnlen(s
, len
- 1);
806 while (p
> s
&& p
[-1] == ' ')
811 static u64
ata_id_n_sectors(const u16
*id
)
813 if (ata_id_has_lba(id
)) {
814 if (ata_id_has_lba48(id
))
815 return ata_id_u64(id
, 100);
817 return ata_id_u32(id
, 60);
819 if (ata_id_current_chs_valid(id
))
820 return ata_id_u32(id
, 57);
822 return id
[1] * id
[3] * id
[6];
827 * ata_noop_dev_select - Select device 0/1 on ATA bus
828 * @ap: ATA channel to manipulate
829 * @device: ATA device (numbered from zero) to select
831 * This function performs no actual function.
833 * May be used as the dev_select() entry in ata_port_operations.
838 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
844 * ata_std_dev_select - Select device 0/1 on ATA bus
845 * @ap: ATA channel to manipulate
846 * @device: ATA device (numbered from zero) to select
848 * Use the method defined in the ATA specification to
849 * make either device 0, or device 1, active on the
850 * ATA channel. Works with both PIO and MMIO.
852 * May be used as the dev_select() entry in ata_port_operations.
858 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
863 tmp
= ATA_DEVICE_OBS
;
865 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
867 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
868 ata_pause(ap
); /* needed; also flushes, for mmio */
872 * ata_dev_select - Select device 0/1 on ATA bus
873 * @ap: ATA channel to manipulate
874 * @device: ATA device (numbered from zero) to select
875 * @wait: non-zero to wait for Status register BSY bit to clear
876 * @can_sleep: non-zero if context allows sleeping
878 * Use the method defined in the ATA specification to
879 * make either device 0, or device 1, active on the
882 * This is a high-level version of ata_std_dev_select(),
883 * which additionally provides the services of inserting
884 * the proper pauses and status polling, where needed.
890 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
891 unsigned int wait
, unsigned int can_sleep
)
893 if (ata_msg_probe(ap
))
894 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
895 "device %u, wait %u\n", device
, wait
);
900 ap
->ops
->dev_select(ap
, device
);
903 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
910 * ata_dump_id - IDENTIFY DEVICE info debugging output
911 * @id: IDENTIFY DEVICE page to dump
913 * Dump selected 16-bit words from the given IDENTIFY DEVICE
920 static inline void ata_dump_id(const u16
*id
)
922 DPRINTK("49==0x%04x "
932 DPRINTK("80==0x%04x "
942 DPRINTK("88==0x%04x "
949 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
950 * @id: IDENTIFY data to compute xfer mask from
952 * Compute the xfermask for this device. This is not as trivial
953 * as it seems if we must consider early devices correctly.
955 * FIXME: pre IDE drive timing (do we care ?).
963 static unsigned int ata_id_xfermask(const u16
*id
)
965 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
967 /* Usual case. Word 53 indicates word 64 is valid */
968 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
969 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
973 /* If word 64 isn't valid then Word 51 high byte holds
974 * the PIO timing number for the maximum. Turn it into
977 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
978 if (mode
< 5) /* Valid PIO range */
979 pio_mask
= (2 << mode
) - 1;
983 /* But wait.. there's more. Design your standards by
984 * committee and you too can get a free iordy field to
985 * process. However its the speeds not the modes that
986 * are supported... Note drivers using the timing API
987 * will get this right anyway
991 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
993 if (ata_id_is_cfa(id
)) {
995 * Process compact flash extended modes
997 int pio
= id
[163] & 0x7;
998 int dma
= (id
[163] >> 3) & 7;
1001 pio_mask
|= (1 << 5);
1003 pio_mask
|= (1 << 6);
1005 mwdma_mask
|= (1 << 3);
1007 mwdma_mask
|= (1 << 4);
1011 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1012 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1014 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1018 * ata_port_queue_task - Queue port_task
1019 * @ap: The ata_port to queue port_task for
1020 * @fn: workqueue function to be scheduled
1021 * @data: data for @fn to use
1022 * @delay: delay time for workqueue function
1024 * Schedule @fn(@data) for execution after @delay jiffies using
1025 * port_task. There is one port_task per port and it's the
1026 * user(low level driver)'s responsibility to make sure that only
1027 * one task is active at any given time.
1029 * libata core layer takes care of synchronization between
1030 * port_task and EH. ata_port_queue_task() may be ignored for EH
1034 * Inherited from caller.
1036 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1037 unsigned long delay
)
1041 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
1044 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1045 ap
->port_task_data
= data
;
1047 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1049 /* rc == 0 means that another user is using port task */
1054 * ata_port_flush_task - Flush port_task
1055 * @ap: The ata_port to flush port_task for
1057 * After this function completes, port_task is guranteed not to
1058 * be running or scheduled.
1061 * Kernel thread context (may sleep)
1063 void ata_port_flush_task(struct ata_port
*ap
)
1065 unsigned long flags
;
1069 spin_lock_irqsave(ap
->lock
, flags
);
1070 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1071 spin_unlock_irqrestore(ap
->lock
, flags
);
1073 DPRINTK("flush #1\n");
1074 flush_workqueue(ata_wq
);
1077 * At this point, if a task is running, it's guaranteed to see
1078 * the FLUSH flag; thus, it will never queue pio tasks again.
1081 if (!cancel_delayed_work(&ap
->port_task
)) {
1082 if (ata_msg_ctl(ap
))
1083 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1085 flush_workqueue(ata_wq
);
1088 spin_lock_irqsave(ap
->lock
, flags
);
1089 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1090 spin_unlock_irqrestore(ap
->lock
, flags
);
1092 if (ata_msg_ctl(ap
))
1093 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1096 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1098 struct completion
*waiting
= qc
->private_data
;
1104 * ata_exec_internal_sg - execute libata internal command
1105 * @dev: Device to which the command is sent
1106 * @tf: Taskfile registers for the command and the result
1107 * @cdb: CDB for packet command
1108 * @dma_dir: Data tranfer direction of the command
1109 * @sg: sg list for the data buffer of the command
1110 * @n_elem: Number of sg entries
1112 * Executes libata internal command with timeout. @tf contains
1113 * command on entry and result on return. Timeout and error
1114 * conditions are reported via return value. No recovery action
1115 * is taken after a command times out. It's caller's duty to
1116 * clean up after timeout.
1119 * None. Should be called with kernel context, might sleep.
1122 * Zero on success, AC_ERR_* mask on failure
1124 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1125 struct ata_taskfile
*tf
, const u8
*cdb
,
1126 int dma_dir
, struct scatterlist
*sg
,
1127 unsigned int n_elem
)
1129 struct ata_port
*ap
= dev
->ap
;
1130 u8 command
= tf
->command
;
1131 struct ata_queued_cmd
*qc
;
1132 unsigned int tag
, preempted_tag
;
1133 u32 preempted_sactive
, preempted_qc_active
;
1134 DECLARE_COMPLETION_ONSTACK(wait
);
1135 unsigned long flags
;
1136 unsigned int err_mask
;
1139 spin_lock_irqsave(ap
->lock
, flags
);
1141 /* no internal command while frozen */
1142 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1143 spin_unlock_irqrestore(ap
->lock
, flags
);
1144 return AC_ERR_SYSTEM
;
1147 /* initialize internal qc */
1149 /* XXX: Tag 0 is used for drivers with legacy EH as some
1150 * drivers choke if any other tag is given. This breaks
1151 * ata_tag_internal() test for those drivers. Don't use new
1152 * EH stuff without converting to it.
1154 if (ap
->ops
->error_handler
)
1155 tag
= ATA_TAG_INTERNAL
;
1159 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1161 qc
= __ata_qc_from_tag(ap
, tag
);
1169 preempted_tag
= ap
->active_tag
;
1170 preempted_sactive
= ap
->sactive
;
1171 preempted_qc_active
= ap
->qc_active
;
1172 ap
->active_tag
= ATA_TAG_POISON
;
1176 /* prepare & issue qc */
1179 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1180 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1181 qc
->dma_dir
= dma_dir
;
1182 if (dma_dir
!= DMA_NONE
) {
1183 unsigned int i
, buflen
= 0;
1185 for (i
= 0; i
< n_elem
; i
++)
1186 buflen
+= sg
[i
].length
;
1188 ata_sg_init(qc
, sg
, n_elem
);
1189 qc
->nbytes
= buflen
;
1192 qc
->private_data
= &wait
;
1193 qc
->complete_fn
= ata_qc_complete_internal
;
1197 spin_unlock_irqrestore(ap
->lock
, flags
);
1199 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1201 ata_port_flush_task(ap
);
1204 spin_lock_irqsave(ap
->lock
, flags
);
1206 /* We're racing with irq here. If we lose, the
1207 * following test prevents us from completing the qc
1208 * twice. If we win, the port is frozen and will be
1209 * cleaned up by ->post_internal_cmd().
1211 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1212 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1214 if (ap
->ops
->error_handler
)
1215 ata_port_freeze(ap
);
1217 ata_qc_complete(qc
);
1219 if (ata_msg_warn(ap
))
1220 ata_dev_printk(dev
, KERN_WARNING
,
1221 "qc timeout (cmd 0x%x)\n", command
);
1224 spin_unlock_irqrestore(ap
->lock
, flags
);
1227 /* do post_internal_cmd */
1228 if (ap
->ops
->post_internal_cmd
)
1229 ap
->ops
->post_internal_cmd(qc
);
1231 if ((qc
->flags
& ATA_QCFLAG_FAILED
) && !qc
->err_mask
) {
1232 if (ata_msg_warn(ap
))
1233 ata_dev_printk(dev
, KERN_WARNING
,
1234 "zero err_mask for failed "
1235 "internal command, assuming AC_ERR_OTHER\n");
1236 qc
->err_mask
|= AC_ERR_OTHER
;
1240 spin_lock_irqsave(ap
->lock
, flags
);
1242 *tf
= qc
->result_tf
;
1243 err_mask
= qc
->err_mask
;
1246 ap
->active_tag
= preempted_tag
;
1247 ap
->sactive
= preempted_sactive
;
1248 ap
->qc_active
= preempted_qc_active
;
1250 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1251 * Until those drivers are fixed, we detect the condition
1252 * here, fail the command with AC_ERR_SYSTEM and reenable the
1255 * Note that this doesn't change any behavior as internal
1256 * command failure results in disabling the device in the
1257 * higher layer for LLDDs without new reset/EH callbacks.
1259 * Kill the following code as soon as those drivers are fixed.
1261 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1262 err_mask
|= AC_ERR_SYSTEM
;
1266 spin_unlock_irqrestore(ap
->lock
, flags
);
1272 * ata_exec_internal - execute libata internal command
1273 * @dev: Device to which the command is sent
1274 * @tf: Taskfile registers for the command and the result
1275 * @cdb: CDB for packet command
1276 * @dma_dir: Data tranfer direction of the command
1277 * @buf: Data buffer of the command
1278 * @buflen: Length of data buffer
1280 * Wrapper around ata_exec_internal_sg() which takes simple
1281 * buffer instead of sg list.
1284 * None. Should be called with kernel context, might sleep.
1287 * Zero on success, AC_ERR_* mask on failure
1289 unsigned ata_exec_internal(struct ata_device
*dev
,
1290 struct ata_taskfile
*tf
, const u8
*cdb
,
1291 int dma_dir
, void *buf
, unsigned int buflen
)
1293 struct scatterlist
*psg
= NULL
, sg
;
1294 unsigned int n_elem
= 0;
1296 if (dma_dir
!= DMA_NONE
) {
1298 sg_init_one(&sg
, buf
, buflen
);
1303 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1307 * ata_do_simple_cmd - execute simple internal command
1308 * @dev: Device to which the command is sent
1309 * @cmd: Opcode to execute
1311 * Execute a 'simple' command, that only consists of the opcode
1312 * 'cmd' itself, without filling any other registers
1315 * Kernel thread context (may sleep).
1318 * Zero on success, AC_ERR_* mask on failure
1320 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1322 struct ata_taskfile tf
;
1324 ata_tf_init(dev
, &tf
);
1327 tf
.flags
|= ATA_TFLAG_DEVICE
;
1328 tf
.protocol
= ATA_PROT_NODATA
;
1330 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1334 * ata_pio_need_iordy - check if iordy needed
1337 * Check if the current speed of the device requires IORDY. Used
1338 * by various controllers for chip configuration.
1341 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1344 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1351 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1353 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1354 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1355 /* Is the speed faster than the drive allows non IORDY ? */
1357 /* This is cycle times not frequency - watch the logic! */
1358 if (pio
> 240) /* PIO2 is 240nS per cycle */
1367 * ata_dev_read_id - Read ID data from the specified device
1368 * @dev: target device
1369 * @p_class: pointer to class of the target device (may be changed)
1370 * @flags: ATA_READID_* flags
1371 * @id: buffer to read IDENTIFY data into
1373 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1374 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1375 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1376 * for pre-ATA4 drives.
1379 * Kernel thread context (may sleep)
1382 * 0 on success, -errno otherwise.
1384 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1385 unsigned int flags
, u16
*id
)
1387 struct ata_port
*ap
= dev
->ap
;
1388 unsigned int class = *p_class
;
1389 struct ata_taskfile tf
;
1390 unsigned int err_mask
= 0;
1394 if (ata_msg_ctl(ap
))
1395 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1397 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1400 ata_tf_init(dev
, &tf
);
1404 tf
.command
= ATA_CMD_ID_ATA
;
1407 tf
.command
= ATA_CMD_ID_ATAPI
;
1411 reason
= "unsupported class";
1415 tf
.protocol
= ATA_PROT_PIO
;
1417 /* Some devices choke if TF registers contain garbage. Make
1418 * sure those are properly initialized.
1420 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1422 /* Device presence detection is unreliable on some
1423 * controllers. Always poll IDENTIFY if available.
1425 tf
.flags
|= ATA_TFLAG_POLLING
;
1427 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1428 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1430 if (err_mask
& AC_ERR_NODEV_HINT
) {
1431 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1432 ap
->print_id
, dev
->devno
);
1437 reason
= "I/O error";
1441 swap_buf_le16(id
, ATA_ID_WORDS
);
1445 reason
= "device reports illegal type";
1447 if (class == ATA_DEV_ATA
) {
1448 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1451 if (ata_id_is_ata(id
))
1455 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1457 * The exact sequence expected by certain pre-ATA4 drives is:
1460 * INITIALIZE DEVICE PARAMETERS
1462 * Some drives were very specific about that exact sequence.
1464 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1465 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1468 reason
= "INIT_DEV_PARAMS failed";
1472 /* current CHS translation info (id[53-58]) might be
1473 * changed. reread the identify device info.
1475 flags
&= ~ATA_READID_POSTRESET
;
1485 if (ata_msg_warn(ap
))
1486 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1487 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1491 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1493 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1496 static void ata_dev_config_ncq(struct ata_device
*dev
,
1497 char *desc
, size_t desc_sz
)
1499 struct ata_port
*ap
= dev
->ap
;
1500 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1502 if (!ata_id_has_ncq(dev
->id
)) {
1506 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1507 snprintf(desc
, desc_sz
, "NCQ (not used)");
1510 if (ap
->flags
& ATA_FLAG_NCQ
) {
1511 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1512 dev
->flags
|= ATA_DFLAG_NCQ
;
1515 if (hdepth
>= ddepth
)
1516 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1518 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1521 static void ata_set_port_max_cmd_len(struct ata_port
*ap
)
1525 if (ap
->scsi_host
) {
1526 unsigned int len
= 0;
1528 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1529 len
= max(len
, ap
->device
[i
].cdb_len
);
1531 ap
->scsi_host
->max_cmd_len
= len
;
1536 * ata_dev_configure - Configure the specified ATA/ATAPI device
1537 * @dev: Target device to configure
1539 * Configure @dev according to @dev->id. Generic and low-level
1540 * driver specific fixups are also applied.
1543 * Kernel thread context (may sleep)
1546 * 0 on success, -errno otherwise
1548 int ata_dev_configure(struct ata_device
*dev
)
1550 struct ata_port
*ap
= dev
->ap
;
1551 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1552 const u16
*id
= dev
->id
;
1553 unsigned int xfer_mask
;
1554 char revbuf
[7]; /* XYZ-99\0 */
1555 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1556 char modelbuf
[ATA_ID_PROD_LEN
+1];
1559 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1560 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1565 if (ata_msg_probe(ap
))
1566 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1569 rc
= ata_acpi_push_id(ap
, dev
->devno
);
1571 ata_dev_printk(dev
, KERN_WARNING
, "failed to set _SDD(%d)\n",
1575 /* retrieve and execute the ATA task file of _GTF */
1576 ata_acpi_exec_tfs(ap
);
1578 /* print device capabilities */
1579 if (ata_msg_probe(ap
))
1580 ata_dev_printk(dev
, KERN_DEBUG
,
1581 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1582 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1584 id
[49], id
[82], id
[83], id
[84],
1585 id
[85], id
[86], id
[87], id
[88]);
1587 /* initialize to-be-configured parameters */
1588 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1589 dev
->max_sectors
= 0;
1597 * common ATA, ATAPI feature tests
1600 /* find max transfer mode; for printk only */
1601 xfer_mask
= ata_id_xfermask(id
);
1603 if (ata_msg_probe(ap
))
1606 /* ATA-specific feature tests */
1607 if (dev
->class == ATA_DEV_ATA
) {
1608 if (ata_id_is_cfa(id
)) {
1609 if (id
[162] & 1) /* CPRM may make this media unusable */
1610 ata_dev_printk(dev
, KERN_WARNING
,
1611 "supports DRM functions and may "
1612 "not be fully accessable.\n");
1613 snprintf(revbuf
, 7, "CFA");
1616 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1618 dev
->n_sectors
= ata_id_n_sectors(id
);
1620 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1621 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1624 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1627 if (dev
->id
[59] & 0x100)
1628 dev
->multi_count
= dev
->id
[59] & 0xff;
1630 if (ata_id_has_lba(id
)) {
1631 const char *lba_desc
;
1635 dev
->flags
|= ATA_DFLAG_LBA
;
1636 if (ata_id_has_lba48(id
)) {
1637 dev
->flags
|= ATA_DFLAG_LBA48
;
1640 if (dev
->n_sectors
>= (1UL << 28) &&
1641 ata_id_has_flush_ext(id
))
1642 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1646 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1648 /* print device info to dmesg */
1649 if (ata_msg_drv(ap
) && print_info
) {
1650 ata_dev_printk(dev
, KERN_INFO
,
1651 "%s: %s, %s, max %s\n",
1652 revbuf
, modelbuf
, fwrevbuf
,
1653 ata_mode_string(xfer_mask
));
1654 ata_dev_printk(dev
, KERN_INFO
,
1655 "%Lu sectors, multi %u: %s %s\n",
1656 (unsigned long long)dev
->n_sectors
,
1657 dev
->multi_count
, lba_desc
, ncq_desc
);
1662 /* Default translation */
1663 dev
->cylinders
= id
[1];
1665 dev
->sectors
= id
[6];
1667 if (ata_id_current_chs_valid(id
)) {
1668 /* Current CHS translation is valid. */
1669 dev
->cylinders
= id
[54];
1670 dev
->heads
= id
[55];
1671 dev
->sectors
= id
[56];
1674 /* print device info to dmesg */
1675 if (ata_msg_drv(ap
) && print_info
) {
1676 ata_dev_printk(dev
, KERN_INFO
,
1677 "%s: %s, %s, max %s\n",
1678 revbuf
, modelbuf
, fwrevbuf
,
1679 ata_mode_string(xfer_mask
));
1680 ata_dev_printk(dev
, KERN_INFO
,
1681 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1682 (unsigned long long)dev
->n_sectors
,
1683 dev
->multi_count
, dev
->cylinders
,
1684 dev
->heads
, dev
->sectors
);
1691 /* ATAPI-specific feature tests */
1692 else if (dev
->class == ATA_DEV_ATAPI
) {
1693 char *cdb_intr_string
= "";
1695 rc
= atapi_cdb_len(id
);
1696 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1697 if (ata_msg_warn(ap
))
1698 ata_dev_printk(dev
, KERN_WARNING
,
1699 "unsupported CDB len\n");
1703 dev
->cdb_len
= (unsigned int) rc
;
1705 if (ata_id_cdb_intr(dev
->id
)) {
1706 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1707 cdb_intr_string
= ", CDB intr";
1710 /* print device info to dmesg */
1711 if (ata_msg_drv(ap
) && print_info
)
1712 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1713 ata_mode_string(xfer_mask
),
1717 /* determine max_sectors */
1718 dev
->max_sectors
= ATA_MAX_SECTORS
;
1719 if (dev
->flags
& ATA_DFLAG_LBA48
)
1720 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1722 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1723 /* Let the user know. We don't want to disallow opens for
1724 rescue purposes, or in case the vendor is just a blithering
1727 ata_dev_printk(dev
, KERN_WARNING
,
1728 "Drive reports diagnostics failure. This may indicate a drive\n");
1729 ata_dev_printk(dev
, KERN_WARNING
,
1730 "fault or invalid emulation. Contact drive vendor for information.\n");
1734 ata_set_port_max_cmd_len(ap
);
1736 /* limit bridge transfers to udma5, 200 sectors */
1737 if (ata_dev_knobble(dev
)) {
1738 if (ata_msg_drv(ap
) && print_info
)
1739 ata_dev_printk(dev
, KERN_INFO
,
1740 "applying bridge limits\n");
1741 dev
->udma_mask
&= ATA_UDMA5
;
1742 dev
->max_sectors
= ATA_MAX_SECTORS
;
1745 if (ap
->ops
->dev_config
)
1746 ap
->ops
->dev_config(ap
, dev
);
1748 if (ata_msg_probe(ap
))
1749 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
1750 __FUNCTION__
, ata_chk_status(ap
));
1754 if (ata_msg_probe(ap
))
1755 ata_dev_printk(dev
, KERN_DEBUG
,
1756 "%s: EXIT, err\n", __FUNCTION__
);
1761 * ata_bus_probe - Reset and probe ATA bus
1764 * Master ATA bus probing function. Initiates a hardware-dependent
1765 * bus reset, then attempts to identify any devices found on
1769 * PCI/etc. bus probe sem.
1772 * Zero on success, negative errno otherwise.
1775 int ata_bus_probe(struct ata_port
*ap
)
1777 unsigned int classes
[ATA_MAX_DEVICES
];
1778 int tries
[ATA_MAX_DEVICES
];
1780 struct ata_device
*dev
;
1784 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1785 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1788 /* reset and determine device classes */
1789 ap
->ops
->phy_reset(ap
);
1791 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1792 dev
= &ap
->device
[i
];
1794 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
1795 dev
->class != ATA_DEV_UNKNOWN
)
1796 classes
[dev
->devno
] = dev
->class;
1798 classes
[dev
->devno
] = ATA_DEV_NONE
;
1800 dev
->class = ATA_DEV_UNKNOWN
;
1805 /* after the reset the device state is PIO 0 and the controller
1806 state is undefined. Record the mode */
1808 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1809 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
1811 /* read IDENTIFY page and configure devices */
1812 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1813 dev
= &ap
->device
[i
];
1816 dev
->class = classes
[i
];
1818 if (!ata_dev_enabled(dev
))
1821 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
1826 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
1827 rc
= ata_dev_configure(dev
);
1828 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
1833 /* configure transfer mode */
1834 rc
= ata_set_mode(ap
, &dev
);
1838 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1839 if (ata_dev_enabled(&ap
->device
[i
]))
1842 /* no device present, disable port */
1843 ata_port_disable(ap
);
1844 ap
->ops
->port_disable(ap
);
1848 tries
[dev
->devno
]--;
1852 /* eeek, something went very wrong, give up */
1853 tries
[dev
->devno
] = 0;
1857 /* give it just one more chance */
1858 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
1860 if (tries
[dev
->devno
] == 1) {
1861 /* This is the last chance, better to slow
1862 * down than lose it.
1864 sata_down_spd_limit(ap
);
1865 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
1869 if (!tries
[dev
->devno
])
1870 ata_dev_disable(dev
);
1876 * ata_port_probe - Mark port as enabled
1877 * @ap: Port for which we indicate enablement
1879 * Modify @ap data structure such that the system
1880 * thinks that the entire port is enabled.
1882 * LOCKING: host lock, or some other form of
1886 void ata_port_probe(struct ata_port
*ap
)
1888 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1892 * sata_print_link_status - Print SATA link status
1893 * @ap: SATA port to printk link status about
1895 * This function prints link speed and status of a SATA link.
1900 static void sata_print_link_status(struct ata_port
*ap
)
1902 u32 sstatus
, scontrol
, tmp
;
1904 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1906 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1908 if (ata_port_online(ap
)) {
1909 tmp
= (sstatus
>> 4) & 0xf;
1910 ata_port_printk(ap
, KERN_INFO
,
1911 "SATA link up %s (SStatus %X SControl %X)\n",
1912 sata_spd_string(tmp
), sstatus
, scontrol
);
1914 ata_port_printk(ap
, KERN_INFO
,
1915 "SATA link down (SStatus %X SControl %X)\n",
1921 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1922 * @ap: SATA port associated with target SATA PHY.
1924 * This function issues commands to standard SATA Sxxx
1925 * PHY registers, to wake up the phy (and device), and
1926 * clear any reset condition.
1929 * PCI/etc. bus probe sem.
1932 void __sata_phy_reset(struct ata_port
*ap
)
1935 unsigned long timeout
= jiffies
+ (HZ
* 5);
1937 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1938 /* issue phy wake/reset */
1939 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1940 /* Couldn't find anything in SATA I/II specs, but
1941 * AHCI-1.1 10.4.2 says at least 1 ms. */
1944 /* phy wake/clear reset */
1945 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1947 /* wait for phy to become ready, if necessary */
1950 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1951 if ((sstatus
& 0xf) != 1)
1953 } while (time_before(jiffies
, timeout
));
1955 /* print link status */
1956 sata_print_link_status(ap
);
1958 /* TODO: phy layer with polling, timeouts, etc. */
1959 if (!ata_port_offline(ap
))
1962 ata_port_disable(ap
);
1964 if (ap
->flags
& ATA_FLAG_DISABLED
)
1967 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1968 ata_port_disable(ap
);
1972 ap
->cbl
= ATA_CBL_SATA
;
1976 * sata_phy_reset - Reset SATA bus.
1977 * @ap: SATA port associated with target SATA PHY.
1979 * This function resets the SATA bus, and then probes
1980 * the bus for devices.
1983 * PCI/etc. bus probe sem.
1986 void sata_phy_reset(struct ata_port
*ap
)
1988 __sata_phy_reset(ap
);
1989 if (ap
->flags
& ATA_FLAG_DISABLED
)
1995 * ata_dev_pair - return other device on cable
1998 * Obtain the other device on the same cable, or if none is
1999 * present NULL is returned
2002 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2004 struct ata_port
*ap
= adev
->ap
;
2005 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2006 if (!ata_dev_enabled(pair
))
2012 * ata_port_disable - Disable port.
2013 * @ap: Port to be disabled.
2015 * Modify @ap data structure such that the system
2016 * thinks that the entire port is disabled, and should
2017 * never attempt to probe or communicate with devices
2020 * LOCKING: host lock, or some other form of
2024 void ata_port_disable(struct ata_port
*ap
)
2026 ap
->device
[0].class = ATA_DEV_NONE
;
2027 ap
->device
[1].class = ATA_DEV_NONE
;
2028 ap
->flags
|= ATA_FLAG_DISABLED
;
2032 * sata_down_spd_limit - adjust SATA spd limit downward
2033 * @ap: Port to adjust SATA spd limit for
2035 * Adjust SATA spd limit of @ap downward. Note that this
2036 * function only adjusts the limit. The change must be applied
2037 * using sata_set_spd().
2040 * Inherited from caller.
2043 * 0 on success, negative errno on failure
2045 int sata_down_spd_limit(struct ata_port
*ap
)
2047 u32 sstatus
, spd
, mask
;
2050 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2054 mask
= ap
->sata_spd_limit
;
2057 highbit
= fls(mask
) - 1;
2058 mask
&= ~(1 << highbit
);
2060 spd
= (sstatus
>> 4) & 0xf;
2064 mask
&= (1 << spd
) - 1;
2068 ap
->sata_spd_limit
= mask
;
2070 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2071 sata_spd_string(fls(mask
)));
2076 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2080 if (ap
->sata_spd_limit
== UINT_MAX
)
2083 limit
= fls(ap
->sata_spd_limit
);
2085 spd
= (*scontrol
>> 4) & 0xf;
2086 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2088 return spd
!= limit
;
2092 * sata_set_spd_needed - is SATA spd configuration needed
2093 * @ap: Port in question
2095 * Test whether the spd limit in SControl matches
2096 * @ap->sata_spd_limit. This function is used to determine
2097 * whether hardreset is necessary to apply SATA spd
2101 * Inherited from caller.
2104 * 1 if SATA spd configuration is needed, 0 otherwise.
2106 int sata_set_spd_needed(struct ata_port
*ap
)
2110 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2113 return __sata_set_spd_needed(ap
, &scontrol
);
2117 * sata_set_spd - set SATA spd according to spd limit
2118 * @ap: Port to set SATA spd for
2120 * Set SATA spd of @ap according to sata_spd_limit.
2123 * Inherited from caller.
2126 * 0 if spd doesn't need to be changed, 1 if spd has been
2127 * changed. Negative errno if SCR registers are inaccessible.
2129 int sata_set_spd(struct ata_port
*ap
)
2134 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2137 if (!__sata_set_spd_needed(ap
, &scontrol
))
2140 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2147 * This mode timing computation functionality is ported over from
2148 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2151 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2152 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2153 * for UDMA6, which is currently supported only by Maxtor drives.
2155 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2158 static const struct ata_timing ata_timing
[] = {
2160 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2161 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2162 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2163 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2165 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2166 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2167 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2168 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2169 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2171 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2173 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2174 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2175 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2177 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2178 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2179 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2181 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2182 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2183 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2184 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2186 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2187 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2188 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2190 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2195 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2196 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2198 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2200 q
->setup
= EZ(t
->setup
* 1000, T
);
2201 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2202 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2203 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2204 q
->active
= EZ(t
->active
* 1000, T
);
2205 q
->recover
= EZ(t
->recover
* 1000, T
);
2206 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2207 q
->udma
= EZ(t
->udma
* 1000, UT
);
2210 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2211 struct ata_timing
*m
, unsigned int what
)
2213 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2214 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2215 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2216 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2217 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2218 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2219 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2220 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2223 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2225 const struct ata_timing
*t
;
2227 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2228 if (t
->mode
== 0xFF)
2233 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2234 struct ata_timing
*t
, int T
, int UT
)
2236 const struct ata_timing
*s
;
2237 struct ata_timing p
;
2243 if (!(s
= ata_timing_find_mode(speed
)))
2246 memcpy(t
, s
, sizeof(*s
));
2249 * If the drive is an EIDE drive, it can tell us it needs extended
2250 * PIO/MW_DMA cycle timing.
2253 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2254 memset(&p
, 0, sizeof(p
));
2255 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2256 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2257 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2258 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2259 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2261 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2265 * Convert the timing to bus clock counts.
2268 ata_timing_quantize(t
, t
, T
, UT
);
2271 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2272 * S.M.A.R.T * and some other commands. We have to ensure that the
2273 * DMA cycle timing is slower/equal than the fastest PIO timing.
2276 if (speed
> XFER_PIO_6
) {
2277 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2278 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2282 * Lengthen active & recovery time so that cycle time is correct.
2285 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2286 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2287 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2290 if (t
->active
+ t
->recover
< t
->cycle
) {
2291 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2292 t
->recover
= t
->cycle
- t
->active
;
2299 * ata_down_xfermask_limit - adjust dev xfer masks downward
2300 * @dev: Device to adjust xfer masks
2301 * @sel: ATA_DNXFER_* selector
2303 * Adjust xfer masks of @dev downward. Note that this function
2304 * does not apply the change. Invoking ata_set_mode() afterwards
2305 * will apply the limit.
2308 * Inherited from caller.
2311 * 0 on success, negative errno on failure
2313 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2316 unsigned int orig_mask
, xfer_mask
;
2317 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2320 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2321 sel
&= ~ATA_DNXFER_QUIET
;
2323 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2326 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2329 case ATA_DNXFER_PIO
:
2330 highbit
= fls(pio_mask
) - 1;
2331 pio_mask
&= ~(1 << highbit
);
2334 case ATA_DNXFER_DMA
:
2336 highbit
= fls(udma_mask
) - 1;
2337 udma_mask
&= ~(1 << highbit
);
2340 } else if (mwdma_mask
) {
2341 highbit
= fls(mwdma_mask
) - 1;
2342 mwdma_mask
&= ~(1 << highbit
);
2348 case ATA_DNXFER_40C
:
2349 udma_mask
&= ATA_UDMA_MASK_40C
;
2352 case ATA_DNXFER_FORCE_PIO0
:
2354 case ATA_DNXFER_FORCE_PIO
:
2363 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2365 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2369 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2370 snprintf(buf
, sizeof(buf
), "%s:%s",
2371 ata_mode_string(xfer_mask
),
2372 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2374 snprintf(buf
, sizeof(buf
), "%s",
2375 ata_mode_string(xfer_mask
));
2377 ata_dev_printk(dev
, KERN_WARNING
,
2378 "limiting speed to %s\n", buf
);
2381 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2387 static int ata_dev_set_mode(struct ata_device
*dev
)
2389 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2390 unsigned int err_mask
;
2393 dev
->flags
&= ~ATA_DFLAG_PIO
;
2394 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2395 dev
->flags
|= ATA_DFLAG_PIO
;
2397 err_mask
= ata_dev_set_xfermode(dev
);
2398 /* Old CFA may refuse this command, which is just fine */
2399 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2400 err_mask
&= ~AC_ERR_DEV
;
2403 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2404 "(err_mask=0x%x)\n", err_mask
);
2408 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2409 rc
= ata_dev_revalidate(dev
, 0);
2410 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2414 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2415 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2417 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2418 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2423 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2424 * @ap: port on which timings will be programmed
2425 * @r_failed_dev: out paramter for failed device
2427 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2428 * ata_set_mode() fails, pointer to the failing device is
2429 * returned in @r_failed_dev.
2432 * PCI/etc. bus probe sem.
2435 * 0 on success, negative errno otherwise
2437 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2439 struct ata_device
*dev
;
2440 int i
, rc
= 0, used_dma
= 0, found
= 0;
2442 /* has private set_mode? */
2443 if (ap
->ops
->set_mode
)
2444 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2446 /* step 1: calculate xfer_mask */
2447 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2448 unsigned int pio_mask
, dma_mask
;
2450 dev
= &ap
->device
[i
];
2452 if (!ata_dev_enabled(dev
))
2455 ata_dev_xfermask(dev
);
2457 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2458 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2459 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2460 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2469 /* step 2: always set host PIO timings */
2470 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2471 dev
= &ap
->device
[i
];
2472 if (!ata_dev_enabled(dev
))
2475 if (!dev
->pio_mode
) {
2476 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2481 dev
->xfer_mode
= dev
->pio_mode
;
2482 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2483 if (ap
->ops
->set_piomode
)
2484 ap
->ops
->set_piomode(ap
, dev
);
2487 /* step 3: set host DMA timings */
2488 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2489 dev
= &ap
->device
[i
];
2491 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2494 dev
->xfer_mode
= dev
->dma_mode
;
2495 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2496 if (ap
->ops
->set_dmamode
)
2497 ap
->ops
->set_dmamode(ap
, dev
);
2500 /* step 4: update devices' xfer mode */
2501 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2502 dev
= &ap
->device
[i
];
2504 /* don't update suspended devices' xfer mode */
2505 if (!ata_dev_ready(dev
))
2508 rc
= ata_dev_set_mode(dev
);
2513 /* Record simplex status. If we selected DMA then the other
2514 * host channels are not permitted to do so.
2516 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2517 ap
->host
->simplex_claimed
= 1;
2519 /* step5: chip specific finalisation */
2520 if (ap
->ops
->post_set_mode
)
2521 ap
->ops
->post_set_mode(ap
);
2525 *r_failed_dev
= dev
;
2530 * ata_tf_to_host - issue ATA taskfile to host controller
2531 * @ap: port to which command is being issued
2532 * @tf: ATA taskfile register set
2534 * Issues ATA taskfile register set to ATA host controller,
2535 * with proper synchronization with interrupt handler and
2539 * spin_lock_irqsave(host lock)
2542 static inline void ata_tf_to_host(struct ata_port
*ap
,
2543 const struct ata_taskfile
*tf
)
2545 ap
->ops
->tf_load(ap
, tf
);
2546 ap
->ops
->exec_command(ap
, tf
);
2550 * ata_busy_sleep - sleep until BSY clears, or timeout
2551 * @ap: port containing status register to be polled
2552 * @tmout_pat: impatience timeout
2553 * @tmout: overall timeout
2555 * Sleep until ATA Status register bit BSY clears,
2556 * or a timeout occurs.
2559 * Kernel thread context (may sleep).
2562 * 0 on success, -errno otherwise.
2564 int ata_busy_sleep(struct ata_port
*ap
,
2565 unsigned long tmout_pat
, unsigned long tmout
)
2567 unsigned long timer_start
, timeout
;
2570 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2571 timer_start
= jiffies
;
2572 timeout
= timer_start
+ tmout_pat
;
2573 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2574 time_before(jiffies
, timeout
)) {
2576 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2579 if (status
!= 0xff && (status
& ATA_BUSY
))
2580 ata_port_printk(ap
, KERN_WARNING
,
2581 "port is slow to respond, please be patient "
2582 "(Status 0x%x)\n", status
);
2584 timeout
= timer_start
+ tmout
;
2585 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2586 time_before(jiffies
, timeout
)) {
2588 status
= ata_chk_status(ap
);
2594 if (status
& ATA_BUSY
) {
2595 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2596 "(%lu secs, Status 0x%x)\n",
2597 tmout
/ HZ
, status
);
2604 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2606 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2607 unsigned int dev0
= devmask
& (1 << 0);
2608 unsigned int dev1
= devmask
& (1 << 1);
2609 unsigned long timeout
;
2611 /* if device 0 was found in ata_devchk, wait for its
2615 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2617 /* if device 1 was found in ata_devchk, wait for
2618 * register access, then wait for BSY to clear
2620 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2624 ap
->ops
->dev_select(ap
, 1);
2625 nsect
= ioread8(ioaddr
->nsect_addr
);
2626 lbal
= ioread8(ioaddr
->lbal_addr
);
2627 if ((nsect
== 1) && (lbal
== 1))
2629 if (time_after(jiffies
, timeout
)) {
2633 msleep(50); /* give drive a breather */
2636 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2638 /* is all this really necessary? */
2639 ap
->ops
->dev_select(ap
, 0);
2641 ap
->ops
->dev_select(ap
, 1);
2643 ap
->ops
->dev_select(ap
, 0);
2646 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2647 unsigned int devmask
)
2649 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2651 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
2653 /* software reset. causes dev0 to be selected */
2654 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2655 udelay(20); /* FIXME: flush */
2656 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2657 udelay(20); /* FIXME: flush */
2658 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2660 /* spec mandates ">= 2ms" before checking status.
2661 * We wait 150ms, because that was the magic delay used for
2662 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2663 * between when the ATA command register is written, and then
2664 * status is checked. Because waiting for "a while" before
2665 * checking status is fine, post SRST, we perform this magic
2666 * delay here as well.
2668 * Old drivers/ide uses the 2mS rule and then waits for ready
2672 /* Before we perform post reset processing we want to see if
2673 * the bus shows 0xFF because the odd clown forgets the D7
2674 * pulldown resistor.
2676 if (ata_check_status(ap
) == 0xFF)
2679 ata_bus_post_reset(ap
, devmask
);
2685 * ata_bus_reset - reset host port and associated ATA channel
2686 * @ap: port to reset
2688 * This is typically the first time we actually start issuing
2689 * commands to the ATA channel. We wait for BSY to clear, then
2690 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2691 * result. Determine what devices, if any, are on the channel
2692 * by looking at the device 0/1 error register. Look at the signature
2693 * stored in each device's taskfile registers, to determine if
2694 * the device is ATA or ATAPI.
2697 * PCI/etc. bus probe sem.
2698 * Obtains host lock.
2701 * Sets ATA_FLAG_DISABLED if bus reset fails.
2704 void ata_bus_reset(struct ata_port
*ap
)
2706 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2707 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2709 unsigned int dev0
, dev1
= 0, devmask
= 0;
2711 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
2713 /* determine if device 0/1 are present */
2714 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2717 dev0
= ata_devchk(ap
, 0);
2719 dev1
= ata_devchk(ap
, 1);
2723 devmask
|= (1 << 0);
2725 devmask
|= (1 << 1);
2727 /* select device 0 again */
2728 ap
->ops
->dev_select(ap
, 0);
2730 /* issue bus reset */
2731 if (ap
->flags
& ATA_FLAG_SRST
)
2732 if (ata_bus_softreset(ap
, devmask
))
2736 * determine by signature whether we have ATA or ATAPI devices
2738 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2739 if ((slave_possible
) && (err
!= 0x81))
2740 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2742 /* re-enable interrupts */
2743 ap
->ops
->irq_on(ap
);
2745 /* is double-select really necessary? */
2746 if (ap
->device
[1].class != ATA_DEV_NONE
)
2747 ap
->ops
->dev_select(ap
, 1);
2748 if (ap
->device
[0].class != ATA_DEV_NONE
)
2749 ap
->ops
->dev_select(ap
, 0);
2751 /* if no devices were detected, disable this port */
2752 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2753 (ap
->device
[1].class == ATA_DEV_NONE
))
2756 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2757 /* set up device control for ATA_FLAG_SATA_RESET */
2758 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2765 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2766 ap
->ops
->port_disable(ap
);
2772 * sata_phy_debounce - debounce SATA phy status
2773 * @ap: ATA port to debounce SATA phy status for
2774 * @params: timing parameters { interval, duratinon, timeout } in msec
2776 * Make sure SStatus of @ap reaches stable state, determined by
2777 * holding the same value where DET is not 1 for @duration polled
2778 * every @interval, before @timeout. Timeout constraints the
2779 * beginning of the stable state. Because, after hot unplugging,
2780 * DET gets stuck at 1 on some controllers, this functions waits
2781 * until timeout then returns 0 if DET is stable at 1.
2784 * Kernel thread context (may sleep)
2787 * 0 on success, -errno on failure.
2789 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
2791 unsigned long interval_msec
= params
[0];
2792 unsigned long duration
= params
[1] * HZ
/ 1000;
2793 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
2794 unsigned long last_jiffies
;
2798 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2803 last_jiffies
= jiffies
;
2806 msleep(interval_msec
);
2807 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2813 if (cur
== 1 && time_before(jiffies
, timeout
))
2815 if (time_after(jiffies
, last_jiffies
+ duration
))
2820 /* unstable, start over */
2822 last_jiffies
= jiffies
;
2825 if (time_after(jiffies
, timeout
))
2831 * sata_phy_resume - resume SATA phy
2832 * @ap: ATA port to resume SATA phy for
2833 * @params: timing parameters { interval, duratinon, timeout } in msec
2835 * Resume SATA phy of @ap and debounce it.
2838 * Kernel thread context (may sleep)
2841 * 0 on success, -errno on failure.
2843 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
2848 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2851 scontrol
= (scontrol
& 0x0f0) | 0x300;
2853 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2856 /* Some PHYs react badly if SStatus is pounded immediately
2857 * after resuming. Delay 200ms before debouncing.
2861 return sata_phy_debounce(ap
, params
);
2864 static void ata_wait_spinup(struct ata_port
*ap
)
2866 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2867 unsigned long end
, secs
;
2870 /* first, debounce phy if SATA */
2871 if (ap
->cbl
== ATA_CBL_SATA
) {
2872 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
2874 /* if debounced successfully and offline, no need to wait */
2875 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
2879 /* okay, let's give the drive time to spin up */
2880 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
2881 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
2883 if (time_after(jiffies
, end
))
2887 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
2888 "(%lu secs)\n", secs
);
2890 schedule_timeout_uninterruptible(end
- jiffies
);
2894 * ata_std_prereset - prepare for reset
2895 * @ap: ATA port to be reset
2897 * @ap is about to be reset. Initialize it.
2900 * Kernel thread context (may sleep)
2903 * 0 on success, -errno otherwise.
2905 int ata_std_prereset(struct ata_port
*ap
)
2907 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2908 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
2911 /* handle link resume & hotplug spinup */
2912 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
2913 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
2914 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2916 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
2917 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
2918 ata_wait_spinup(ap
);
2920 /* if we're about to do hardreset, nothing more to do */
2921 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
2924 /* if SATA, resume phy */
2925 if (ap
->cbl
== ATA_CBL_SATA
) {
2926 rc
= sata_phy_resume(ap
, timing
);
2927 if (rc
&& rc
!= -EOPNOTSUPP
) {
2928 /* phy resume failed */
2929 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
2930 "link for reset (errno=%d)\n", rc
);
2935 /* Wait for !BSY if the controller can wait for the first D2H
2936 * Reg FIS and we don't know that no device is attached.
2938 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
2939 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2945 * ata_std_softreset - reset host port via ATA SRST
2946 * @ap: port to reset
2947 * @classes: resulting classes of attached devices
2949 * Reset host port using ATA SRST.
2952 * Kernel thread context (may sleep)
2955 * 0 on success, -errno otherwise.
2957 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2959 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2960 unsigned int devmask
= 0, err_mask
;
2965 if (ata_port_offline(ap
)) {
2966 classes
[0] = ATA_DEV_NONE
;
2970 /* determine if device 0/1 are present */
2971 if (ata_devchk(ap
, 0))
2972 devmask
|= (1 << 0);
2973 if (slave_possible
&& ata_devchk(ap
, 1))
2974 devmask
|= (1 << 1);
2976 /* select device 0 again */
2977 ap
->ops
->dev_select(ap
, 0);
2979 /* issue bus reset */
2980 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2981 err_mask
= ata_bus_softreset(ap
, devmask
);
2983 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
2988 /* determine by signature whether we have ATA or ATAPI devices */
2989 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2990 if (slave_possible
&& err
!= 0x81)
2991 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2994 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2999 * sata_port_hardreset - reset port via SATA phy reset
3000 * @ap: port to reset
3001 * @timing: timing parameters { interval, duratinon, timeout } in msec
3003 * SATA phy-reset host port using DET bits of SControl register.
3006 * Kernel thread context (may sleep)
3009 * 0 on success, -errno otherwise.
3011 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
3018 if (sata_set_spd_needed(ap
)) {
3019 /* SATA spec says nothing about how to reconfigure
3020 * spd. To be on the safe side, turn off phy during
3021 * reconfiguration. This works for at least ICH7 AHCI
3024 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3027 scontrol
= (scontrol
& 0x0f0) | 0x304;
3029 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3035 /* issue phy wake/reset */
3036 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3039 scontrol
= (scontrol
& 0x0f0) | 0x301;
3041 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3044 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3045 * 10.4.2 says at least 1 ms.
3049 /* bring phy back */
3050 rc
= sata_phy_resume(ap
, timing
);
3052 DPRINTK("EXIT, rc=%d\n", rc
);
3057 * sata_std_hardreset - reset host port via SATA phy reset
3058 * @ap: port to reset
3059 * @class: resulting class of attached device
3061 * SATA phy-reset host port using DET bits of SControl register,
3062 * wait for !BSY and classify the attached device.
3065 * Kernel thread context (may sleep)
3068 * 0 on success, -errno otherwise.
3070 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
3072 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3078 rc
= sata_port_hardreset(ap
, timing
);
3080 ata_port_printk(ap
, KERN_ERR
,
3081 "COMRESET failed (errno=%d)\n", rc
);
3085 /* TODO: phy layer with polling, timeouts, etc. */
3086 if (ata_port_offline(ap
)) {
3087 *class = ATA_DEV_NONE
;
3088 DPRINTK("EXIT, link offline\n");
3092 /* wait a while before checking status, see SRST for more info */
3095 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
3096 ata_port_printk(ap
, KERN_ERR
,
3097 "COMRESET failed (device not ready)\n");
3101 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3103 *class = ata_dev_try_classify(ap
, 0, NULL
);
3105 DPRINTK("EXIT, class=%u\n", *class);
3110 * ata_std_postreset - standard postreset callback
3111 * @ap: the target ata_port
3112 * @classes: classes of attached devices
3114 * This function is invoked after a successful reset. Note that
3115 * the device might have been reset more than once using
3116 * different reset methods before postreset is invoked.
3119 * Kernel thread context (may sleep)
3121 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3127 /* print link status */
3128 sata_print_link_status(ap
);
3131 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3132 sata_scr_write(ap
, SCR_ERROR
, serror
);
3134 /* re-enable interrupts */
3135 if (!ap
->ops
->error_handler
)
3136 ap
->ops
->irq_on(ap
);
3138 /* is double-select really necessary? */
3139 if (classes
[0] != ATA_DEV_NONE
)
3140 ap
->ops
->dev_select(ap
, 1);
3141 if (classes
[1] != ATA_DEV_NONE
)
3142 ap
->ops
->dev_select(ap
, 0);
3144 /* bail out if no device is present */
3145 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3146 DPRINTK("EXIT, no device\n");
3150 /* set up device control */
3151 if (ap
->ioaddr
.ctl_addr
)
3152 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3158 * ata_dev_same_device - Determine whether new ID matches configured device
3159 * @dev: device to compare against
3160 * @new_class: class of the new device
3161 * @new_id: IDENTIFY page of the new device
3163 * Compare @new_class and @new_id against @dev and determine
3164 * whether @dev is the device indicated by @new_class and
3171 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3173 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3176 const u16
*old_id
= dev
->id
;
3177 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3178 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3181 if (dev
->class != new_class
) {
3182 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3183 dev
->class, new_class
);
3187 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3188 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3189 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3190 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3191 new_n_sectors
= ata_id_n_sectors(new_id
);
3193 if (strcmp(model
[0], model
[1])) {
3194 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3195 "'%s' != '%s'\n", model
[0], model
[1]);
3199 if (strcmp(serial
[0], serial
[1])) {
3200 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3201 "'%s' != '%s'\n", serial
[0], serial
[1]);
3205 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3206 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3208 (unsigned long long)dev
->n_sectors
,
3209 (unsigned long long)new_n_sectors
);
3217 * ata_dev_revalidate - Revalidate ATA device
3218 * @dev: device to revalidate
3219 * @readid_flags: read ID flags
3221 * Re-read IDENTIFY page and make sure @dev is still attached to
3225 * Kernel thread context (may sleep)
3228 * 0 on success, negative errno otherwise
3230 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3232 unsigned int class = dev
->class;
3233 u16
*id
= (void *)dev
->ap
->sector_buf
;
3236 if (!ata_dev_enabled(dev
)) {
3242 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3246 /* is the device still there? */
3247 if (!ata_dev_same_device(dev
, class, id
)) {
3252 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3254 /* configure device according to the new ID */
3255 rc
= ata_dev_configure(dev
);
3260 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3264 struct ata_blacklist_entry
{
3265 const char *model_num
;
3266 const char *model_rev
;
3267 unsigned long horkage
;
3270 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3271 /* Devices with DMA related problems under Linux */
3272 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3273 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3274 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3275 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3276 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3277 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3278 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3279 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3280 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3281 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3282 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3283 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3284 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3285 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3286 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3287 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3288 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3289 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3290 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3291 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3292 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3293 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3294 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3295 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3296 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3297 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3298 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3299 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3300 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3302 /* Devices we expect to fail diagnostics */
3304 /* Devices where NCQ should be avoided */
3306 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3308 /* Devices with NCQ limits */
3314 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3316 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3317 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3318 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3320 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3321 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3323 while (ad
->model_num
) {
3324 if (!strcmp(ad
->model_num
, model_num
)) {
3325 if (ad
->model_rev
== NULL
)
3327 if (!strcmp(ad
->model_rev
, model_rev
))
3335 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3337 /* We don't support polling DMA.
3338 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3339 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3341 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3342 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3344 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3348 * ata_dev_xfermask - Compute supported xfermask of the given device
3349 * @dev: Device to compute xfermask for
3351 * Compute supported xfermask of @dev and store it in
3352 * dev->*_mask. This function is responsible for applying all
3353 * known limits including host controller limits, device
3359 static void ata_dev_xfermask(struct ata_device
*dev
)
3361 struct ata_port
*ap
= dev
->ap
;
3362 struct ata_host
*host
= ap
->host
;
3363 unsigned long xfer_mask
;
3365 /* controller modes available */
3366 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3367 ap
->mwdma_mask
, ap
->udma_mask
);
3369 /* Apply cable rule here. Don't apply it early because when
3370 * we handle hot plug the cable type can itself change.
3372 if (ap
->cbl
== ATA_CBL_PATA40
)
3373 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3374 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3375 * host side are checked drive side as well. Cases where we know a
3376 * 40wire cable is used safely for 80 are not checked here.
3378 if (ata_drive_40wire(dev
->id
) && (ap
->cbl
== ATA_CBL_PATA_UNK
|| ap
->cbl
== ATA_CBL_PATA80
))
3379 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3382 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3383 dev
->mwdma_mask
, dev
->udma_mask
);
3384 xfer_mask
&= ata_id_xfermask(dev
->id
);
3387 * CFA Advanced TrueIDE timings are not allowed on a shared
3390 if (ata_dev_pair(dev
)) {
3391 /* No PIO5 or PIO6 */
3392 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3393 /* No MWDMA3 or MWDMA 4 */
3394 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3397 if (ata_dma_blacklisted(dev
)) {
3398 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3399 ata_dev_printk(dev
, KERN_WARNING
,
3400 "device is on DMA blacklist, disabling DMA\n");
3403 if ((host
->flags
& ATA_HOST_SIMPLEX
) && host
->simplex_claimed
) {
3404 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3405 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3406 "other device, disabling DMA\n");
3409 if (ap
->ops
->mode_filter
)
3410 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3412 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3413 &dev
->mwdma_mask
, &dev
->udma_mask
);
3417 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3418 * @dev: Device to which command will be sent
3420 * Issue SET FEATURES - XFER MODE command to device @dev
3424 * PCI/etc. bus probe sem.
3427 * 0 on success, AC_ERR_* mask otherwise.
3430 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3432 struct ata_taskfile tf
;
3433 unsigned int err_mask
;
3435 /* set up set-features taskfile */
3436 DPRINTK("set features - xfer mode\n");
3438 ata_tf_init(dev
, &tf
);
3439 tf
.command
= ATA_CMD_SET_FEATURES
;
3440 tf
.feature
= SETFEATURES_XFER
;
3441 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3442 tf
.protocol
= ATA_PROT_NODATA
;
3443 tf
.nsect
= dev
->xfer_mode
;
3445 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3447 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3452 * ata_dev_init_params - Issue INIT DEV PARAMS command
3453 * @dev: Device to which command will be sent
3454 * @heads: Number of heads (taskfile parameter)
3455 * @sectors: Number of sectors (taskfile parameter)
3458 * Kernel thread context (may sleep)
3461 * 0 on success, AC_ERR_* mask otherwise.
3463 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3464 u16 heads
, u16 sectors
)
3466 struct ata_taskfile tf
;
3467 unsigned int err_mask
;
3469 /* Number of sectors per track 1-255. Number of heads 1-16 */
3470 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3471 return AC_ERR_INVALID
;
3473 /* set up init dev params taskfile */
3474 DPRINTK("init dev params \n");
3476 ata_tf_init(dev
, &tf
);
3477 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3478 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3479 tf
.protocol
= ATA_PROT_NODATA
;
3481 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3483 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3485 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3490 * ata_sg_clean - Unmap DMA memory associated with command
3491 * @qc: Command containing DMA memory to be released
3493 * Unmap all mapped DMA memory associated with this command.
3496 * spin_lock_irqsave(host lock)
3498 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3500 struct ata_port
*ap
= qc
->ap
;
3501 struct scatterlist
*sg
= qc
->__sg
;
3502 int dir
= qc
->dma_dir
;
3503 void *pad_buf
= NULL
;
3505 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3506 WARN_ON(sg
== NULL
);
3508 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3509 WARN_ON(qc
->n_elem
> 1);
3511 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3513 /* if we padded the buffer out to 32-bit bound, and data
3514 * xfer direction is from-device, we must copy from the
3515 * pad buffer back into the supplied buffer
3517 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3518 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3520 if (qc
->flags
& ATA_QCFLAG_SG
) {
3522 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3523 /* restore last sg */
3524 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3526 struct scatterlist
*psg
= &qc
->pad_sgent
;
3527 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3528 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3529 kunmap_atomic(addr
, KM_IRQ0
);
3533 dma_unmap_single(ap
->dev
,
3534 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3537 sg
->length
+= qc
->pad_len
;
3539 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3540 pad_buf
, qc
->pad_len
);
3543 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3548 * ata_fill_sg - Fill PCI IDE PRD table
3549 * @qc: Metadata associated with taskfile to be transferred
3551 * Fill PCI IDE PRD (scatter-gather) table with segments
3552 * associated with the current disk command.
3555 * spin_lock_irqsave(host lock)
3558 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3560 struct ata_port
*ap
= qc
->ap
;
3561 struct scatterlist
*sg
;
3564 WARN_ON(qc
->__sg
== NULL
);
3565 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3568 ata_for_each_sg(sg
, qc
) {
3572 /* determine if physical DMA addr spans 64K boundary.
3573 * Note h/w doesn't support 64-bit, so we unconditionally
3574 * truncate dma_addr_t to u32.
3576 addr
= (u32
) sg_dma_address(sg
);
3577 sg_len
= sg_dma_len(sg
);
3580 offset
= addr
& 0xffff;
3582 if ((offset
+ sg_len
) > 0x10000)
3583 len
= 0x10000 - offset
;
3585 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3586 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3587 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3596 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3599 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3600 * @qc: Metadata associated with taskfile to check
3602 * Allow low-level driver to filter ATA PACKET commands, returning
3603 * a status indicating whether or not it is OK to use DMA for the
3604 * supplied PACKET command.
3607 * spin_lock_irqsave(host lock)
3609 * RETURNS: 0 when ATAPI DMA can be used
3612 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3614 struct ata_port
*ap
= qc
->ap
;
3615 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3617 if (ap
->ops
->check_atapi_dma
)
3618 rc
= ap
->ops
->check_atapi_dma(qc
);
3623 * ata_qc_prep - Prepare taskfile for submission
3624 * @qc: Metadata associated with taskfile to be prepared
3626 * Prepare ATA taskfile for submission.
3629 * spin_lock_irqsave(host lock)
3631 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3633 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3639 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3642 * ata_sg_init_one - Associate command with memory buffer
3643 * @qc: Command to be associated
3644 * @buf: Memory buffer
3645 * @buflen: Length of memory buffer, in bytes.
3647 * Initialize the data-related elements of queued_cmd @qc
3648 * to point to a single memory buffer, @buf of byte length @buflen.
3651 * spin_lock_irqsave(host lock)
3654 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3656 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3658 qc
->__sg
= &qc
->sgent
;
3660 qc
->orig_n_elem
= 1;
3662 qc
->nbytes
= buflen
;
3664 sg_init_one(&qc
->sgent
, buf
, buflen
);
3668 * ata_sg_init - Associate command with scatter-gather table.
3669 * @qc: Command to be associated
3670 * @sg: Scatter-gather table.
3671 * @n_elem: Number of elements in s/g table.
3673 * Initialize the data-related elements of queued_cmd @qc
3674 * to point to a scatter-gather table @sg, containing @n_elem
3678 * spin_lock_irqsave(host lock)
3681 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3682 unsigned int n_elem
)
3684 qc
->flags
|= ATA_QCFLAG_SG
;
3686 qc
->n_elem
= n_elem
;
3687 qc
->orig_n_elem
= n_elem
;
3691 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3692 * @qc: Command with memory buffer to be mapped.
3694 * DMA-map the memory buffer associated with queued_cmd @qc.
3697 * spin_lock_irqsave(host lock)
3700 * Zero on success, negative on error.
3703 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3705 struct ata_port
*ap
= qc
->ap
;
3706 int dir
= qc
->dma_dir
;
3707 struct scatterlist
*sg
= qc
->__sg
;
3708 dma_addr_t dma_address
;
3711 /* we must lengthen transfers to end on a 32-bit boundary */
3712 qc
->pad_len
= sg
->length
& 3;
3714 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3715 struct scatterlist
*psg
= &qc
->pad_sgent
;
3717 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3719 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3721 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3722 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3725 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3726 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3728 sg
->length
-= qc
->pad_len
;
3729 if (sg
->length
== 0)
3732 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3733 sg
->length
, qc
->pad_len
);
3741 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3743 if (dma_mapping_error(dma_address
)) {
3745 sg
->length
+= qc
->pad_len
;
3749 sg_dma_address(sg
) = dma_address
;
3750 sg_dma_len(sg
) = sg
->length
;
3753 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3754 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3760 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3761 * @qc: Command with scatter-gather table to be mapped.
3763 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3766 * spin_lock_irqsave(host lock)
3769 * Zero on success, negative on error.
3773 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3775 struct ata_port
*ap
= qc
->ap
;
3776 struct scatterlist
*sg
= qc
->__sg
;
3777 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3778 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3780 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
3781 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3783 /* we must lengthen transfers to end on a 32-bit boundary */
3784 qc
->pad_len
= lsg
->length
& 3;
3786 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3787 struct scatterlist
*psg
= &qc
->pad_sgent
;
3788 unsigned int offset
;
3790 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3792 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3795 * psg->page/offset are used to copy to-be-written
3796 * data in this function or read data in ata_sg_clean.
3798 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3799 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3800 psg
->offset
= offset_in_page(offset
);
3802 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3803 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3804 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3805 kunmap_atomic(addr
, KM_IRQ0
);
3808 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3809 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3811 lsg
->length
-= qc
->pad_len
;
3812 if (lsg
->length
== 0)
3815 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3816 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3819 pre_n_elem
= qc
->n_elem
;
3820 if (trim_sg
&& pre_n_elem
)
3829 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3831 /* restore last sg */
3832 lsg
->length
+= qc
->pad_len
;
3836 DPRINTK("%d sg elements mapped\n", n_elem
);
3839 qc
->n_elem
= n_elem
;
3845 * swap_buf_le16 - swap halves of 16-bit words in place
3846 * @buf: Buffer to swap
3847 * @buf_words: Number of 16-bit words in buffer.
3849 * Swap halves of 16-bit words if needed to convert from
3850 * little-endian byte order to native cpu byte order, or
3854 * Inherited from caller.
3856 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3861 for (i
= 0; i
< buf_words
; i
++)
3862 buf
[i
] = le16_to_cpu(buf
[i
]);
3863 #endif /* __BIG_ENDIAN */
3867 * ata_data_xfer - Transfer data by PIO
3868 * @adev: device to target
3870 * @buflen: buffer length
3871 * @write_data: read/write
3873 * Transfer data from/to the device data register by PIO.
3876 * Inherited from caller.
3878 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3879 unsigned int buflen
, int write_data
)
3881 struct ata_port
*ap
= adev
->ap
;
3882 unsigned int words
= buflen
>> 1;
3884 /* Transfer multiple of 2 bytes */
3886 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3888 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3890 /* Transfer trailing 1 byte, if any. */
3891 if (unlikely(buflen
& 0x01)) {
3892 u16 align_buf
[1] = { 0 };
3893 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3896 memcpy(align_buf
, trailing_buf
, 1);
3897 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3899 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
3900 memcpy(trailing_buf
, align_buf
, 1);
3906 * ata_data_xfer_noirq - Transfer data by PIO
3907 * @adev: device to target
3909 * @buflen: buffer length
3910 * @write_data: read/write
3912 * Transfer data from/to the device data register by PIO. Do the
3913 * transfer with interrupts disabled.
3916 * Inherited from caller.
3918 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
3919 unsigned int buflen
, int write_data
)
3921 unsigned long flags
;
3922 local_irq_save(flags
);
3923 ata_data_xfer(adev
, buf
, buflen
, write_data
);
3924 local_irq_restore(flags
);
3929 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3930 * @qc: Command on going
3932 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3935 * Inherited from caller.
3938 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3940 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3941 struct scatterlist
*sg
= qc
->__sg
;
3942 struct ata_port
*ap
= qc
->ap
;
3944 unsigned int offset
;
3947 if (qc
->curbytes
== qc
->nbytes
- ATA_SECT_SIZE
)
3948 ap
->hsm_task_state
= HSM_ST_LAST
;
3950 page
= sg
[qc
->cursg
].page
;
3951 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
3953 /* get the current page and offset */
3954 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3955 offset
%= PAGE_SIZE
;
3957 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3959 if (PageHighMem(page
)) {
3960 unsigned long flags
;
3962 /* FIXME: use a bounce buffer */
3963 local_irq_save(flags
);
3964 buf
= kmap_atomic(page
, KM_IRQ0
);
3966 /* do the actual data transfer */
3967 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3969 kunmap_atomic(buf
, KM_IRQ0
);
3970 local_irq_restore(flags
);
3972 buf
= page_address(page
);
3973 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3976 qc
->curbytes
+= ATA_SECT_SIZE
;
3977 qc
->cursg_ofs
+= ATA_SECT_SIZE
;
3979 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
3986 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3987 * @qc: Command on going
3989 * Transfer one or many ATA_SECT_SIZE of data from/to the
3990 * ATA device for the DRQ request.
3993 * Inherited from caller.
3996 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
3998 if (is_multi_taskfile(&qc
->tf
)) {
3999 /* READ/WRITE MULTIPLE */
4002 WARN_ON(qc
->dev
->multi_count
== 0);
4004 nsect
= min((qc
->nbytes
- qc
->curbytes
) / ATA_SECT_SIZE
,
4005 qc
->dev
->multi_count
);
4013 * atapi_send_cdb - Write CDB bytes to hardware
4014 * @ap: Port to which ATAPI device is attached.
4015 * @qc: Taskfile currently active
4017 * When device has indicated its readiness to accept
4018 * a CDB, this function is called. Send the CDB.
4024 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4027 DPRINTK("send cdb\n");
4028 WARN_ON(qc
->dev
->cdb_len
< 12);
4030 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4031 ata_altstatus(ap
); /* flush */
4033 switch (qc
->tf
.protocol
) {
4034 case ATA_PROT_ATAPI
:
4035 ap
->hsm_task_state
= HSM_ST
;
4037 case ATA_PROT_ATAPI_NODATA
:
4038 ap
->hsm_task_state
= HSM_ST_LAST
;
4040 case ATA_PROT_ATAPI_DMA
:
4041 ap
->hsm_task_state
= HSM_ST_LAST
;
4042 /* initiate bmdma */
4043 ap
->ops
->bmdma_start(qc
);
4049 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4050 * @qc: Command on going
4051 * @bytes: number of bytes
4053 * Transfer Transfer data from/to the ATAPI device.
4056 * Inherited from caller.
4060 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4062 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4063 struct scatterlist
*sg
= qc
->__sg
;
4064 struct ata_port
*ap
= qc
->ap
;
4067 unsigned int offset
, count
;
4069 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4070 ap
->hsm_task_state
= HSM_ST_LAST
;
4073 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4075 * The end of qc->sg is reached and the device expects
4076 * more data to transfer. In order not to overrun qc->sg
4077 * and fulfill length specified in the byte count register,
4078 * - for read case, discard trailing data from the device
4079 * - for write case, padding zero data to the device
4081 u16 pad_buf
[1] = { 0 };
4082 unsigned int words
= bytes
>> 1;
4085 if (words
) /* warning if bytes > 1 */
4086 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4087 "%u bytes trailing data\n", bytes
);
4089 for (i
= 0; i
< words
; i
++)
4090 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4092 ap
->hsm_task_state
= HSM_ST_LAST
;
4096 sg
= &qc
->__sg
[qc
->cursg
];
4099 offset
= sg
->offset
+ qc
->cursg_ofs
;
4101 /* get the current page and offset */
4102 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4103 offset
%= PAGE_SIZE
;
4105 /* don't overrun current sg */
4106 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4108 /* don't cross page boundaries */
4109 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4111 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4113 if (PageHighMem(page
)) {
4114 unsigned long flags
;
4116 /* FIXME: use bounce buffer */
4117 local_irq_save(flags
);
4118 buf
= kmap_atomic(page
, KM_IRQ0
);
4120 /* do the actual data transfer */
4121 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4123 kunmap_atomic(buf
, KM_IRQ0
);
4124 local_irq_restore(flags
);
4126 buf
= page_address(page
);
4127 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4131 qc
->curbytes
+= count
;
4132 qc
->cursg_ofs
+= count
;
4134 if (qc
->cursg_ofs
== sg
->length
) {
4144 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4145 * @qc: Command on going
4147 * Transfer Transfer data from/to the ATAPI device.
4150 * Inherited from caller.
4153 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4155 struct ata_port
*ap
= qc
->ap
;
4156 struct ata_device
*dev
= qc
->dev
;
4157 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4158 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4160 /* Abuse qc->result_tf for temp storage of intermediate TF
4161 * here to save some kernel stack usage.
4162 * For normal completion, qc->result_tf is not relevant. For
4163 * error, qc->result_tf is later overwritten by ata_qc_complete().
4164 * So, the correctness of qc->result_tf is not affected.
4166 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4167 ireason
= qc
->result_tf
.nsect
;
4168 bc_lo
= qc
->result_tf
.lbam
;
4169 bc_hi
= qc
->result_tf
.lbah
;
4170 bytes
= (bc_hi
<< 8) | bc_lo
;
4172 /* shall be cleared to zero, indicating xfer of data */
4173 if (ireason
& (1 << 0))
4176 /* make sure transfer direction matches expected */
4177 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4178 if (do_write
!= i_write
)
4181 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4183 __atapi_pio_bytes(qc
, bytes
);
4188 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4189 qc
->err_mask
|= AC_ERR_HSM
;
4190 ap
->hsm_task_state
= HSM_ST_ERR
;
4194 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4195 * @ap: the target ata_port
4199 * 1 if ok in workqueue, 0 otherwise.
4202 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4204 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4207 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4208 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4209 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4212 if (is_atapi_taskfile(&qc
->tf
) &&
4213 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4221 * ata_hsm_qc_complete - finish a qc running on standard HSM
4222 * @qc: Command to complete
4223 * @in_wq: 1 if called from workqueue, 0 otherwise
4225 * Finish @qc which is running on standard HSM.
4228 * If @in_wq is zero, spin_lock_irqsave(host lock).
4229 * Otherwise, none on entry and grabs host lock.
4231 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4233 struct ata_port
*ap
= qc
->ap
;
4234 unsigned long flags
;
4236 if (ap
->ops
->error_handler
) {
4238 spin_lock_irqsave(ap
->lock
, flags
);
4240 /* EH might have kicked in while host lock is
4243 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4245 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4246 ap
->ops
->irq_on(ap
);
4247 ata_qc_complete(qc
);
4249 ata_port_freeze(ap
);
4252 spin_unlock_irqrestore(ap
->lock
, flags
);
4254 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4255 ata_qc_complete(qc
);
4257 ata_port_freeze(ap
);
4261 spin_lock_irqsave(ap
->lock
, flags
);
4262 ap
->ops
->irq_on(ap
);
4263 ata_qc_complete(qc
);
4264 spin_unlock_irqrestore(ap
->lock
, flags
);
4266 ata_qc_complete(qc
);
4269 ata_altstatus(ap
); /* flush */
4273 * ata_hsm_move - move the HSM to the next state.
4274 * @ap: the target ata_port
4276 * @status: current device status
4277 * @in_wq: 1 if called from workqueue, 0 otherwise
4280 * 1 when poll next status needed, 0 otherwise.
4282 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4283 u8 status
, int in_wq
)
4285 unsigned long flags
= 0;
4288 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4290 /* Make sure ata_qc_issue_prot() does not throw things
4291 * like DMA polling into the workqueue. Notice that
4292 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4294 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4297 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4298 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4300 switch (ap
->hsm_task_state
) {
4302 /* Send first data block or PACKET CDB */
4304 /* If polling, we will stay in the work queue after
4305 * sending the data. Otherwise, interrupt handler
4306 * takes over after sending the data.
4308 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4310 /* check device status */
4311 if (unlikely((status
& ATA_DRQ
) == 0)) {
4312 /* handle BSY=0, DRQ=0 as error */
4313 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4314 /* device stops HSM for abort/error */
4315 qc
->err_mask
|= AC_ERR_DEV
;
4317 /* HSM violation. Let EH handle this */
4318 qc
->err_mask
|= AC_ERR_HSM
;
4320 ap
->hsm_task_state
= HSM_ST_ERR
;
4324 /* Device should not ask for data transfer (DRQ=1)
4325 * when it finds something wrong.
4326 * We ignore DRQ here and stop the HSM by
4327 * changing hsm_task_state to HSM_ST_ERR and
4328 * let the EH abort the command or reset the device.
4330 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4331 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4332 "error, dev_stat 0x%X\n", status
);
4333 qc
->err_mask
|= AC_ERR_HSM
;
4334 ap
->hsm_task_state
= HSM_ST_ERR
;
4338 /* Send the CDB (atapi) or the first data block (ata pio out).
4339 * During the state transition, interrupt handler shouldn't
4340 * be invoked before the data transfer is complete and
4341 * hsm_task_state is changed. Hence, the following locking.
4344 spin_lock_irqsave(ap
->lock
, flags
);
4346 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4347 /* PIO data out protocol.
4348 * send first data block.
4351 /* ata_pio_sectors() might change the state
4352 * to HSM_ST_LAST. so, the state is changed here
4353 * before ata_pio_sectors().
4355 ap
->hsm_task_state
= HSM_ST
;
4356 ata_pio_sectors(qc
);
4357 ata_altstatus(ap
); /* flush */
4360 atapi_send_cdb(ap
, qc
);
4363 spin_unlock_irqrestore(ap
->lock
, flags
);
4365 /* if polling, ata_pio_task() handles the rest.
4366 * otherwise, interrupt handler takes over from here.
4371 /* complete command or read/write the data register */
4372 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4373 /* ATAPI PIO protocol */
4374 if ((status
& ATA_DRQ
) == 0) {
4375 /* No more data to transfer or device error.
4376 * Device error will be tagged in HSM_ST_LAST.
4378 ap
->hsm_task_state
= HSM_ST_LAST
;
4382 /* Device should not ask for data transfer (DRQ=1)
4383 * when it finds something wrong.
4384 * We ignore DRQ here and stop the HSM by
4385 * changing hsm_task_state to HSM_ST_ERR and
4386 * let the EH abort the command or reset the device.
4388 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4389 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
4390 "device error, dev_stat 0x%X\n",
4392 qc
->err_mask
|= AC_ERR_HSM
;
4393 ap
->hsm_task_state
= HSM_ST_ERR
;
4397 atapi_pio_bytes(qc
);
4399 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4400 /* bad ireason reported by device */
4404 /* ATA PIO protocol */
4405 if (unlikely((status
& ATA_DRQ
) == 0)) {
4406 /* handle BSY=0, DRQ=0 as error */
4407 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4408 /* device stops HSM for abort/error */
4409 qc
->err_mask
|= AC_ERR_DEV
;
4411 /* HSM violation. Let EH handle this.
4412 * Phantom devices also trigger this
4413 * condition. Mark hint.
4415 qc
->err_mask
|= AC_ERR_HSM
|
4418 ap
->hsm_task_state
= HSM_ST_ERR
;
4422 /* For PIO reads, some devices may ask for
4423 * data transfer (DRQ=1) alone with ERR=1.
4424 * We respect DRQ here and transfer one
4425 * block of junk data before changing the
4426 * hsm_task_state to HSM_ST_ERR.
4428 * For PIO writes, ERR=1 DRQ=1 doesn't make
4429 * sense since the data block has been
4430 * transferred to the device.
4432 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4433 /* data might be corrputed */
4434 qc
->err_mask
|= AC_ERR_DEV
;
4436 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4437 ata_pio_sectors(qc
);
4439 status
= ata_wait_idle(ap
);
4442 if (status
& (ATA_BUSY
| ATA_DRQ
))
4443 qc
->err_mask
|= AC_ERR_HSM
;
4445 /* ata_pio_sectors() might change the
4446 * state to HSM_ST_LAST. so, the state
4447 * is changed after ata_pio_sectors().
4449 ap
->hsm_task_state
= HSM_ST_ERR
;
4453 ata_pio_sectors(qc
);
4455 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4456 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4459 status
= ata_wait_idle(ap
);
4464 ata_altstatus(ap
); /* flush */
4469 if (unlikely(!ata_ok(status
))) {
4470 qc
->err_mask
|= __ac_err_mask(status
);
4471 ap
->hsm_task_state
= HSM_ST_ERR
;
4475 /* no more data to transfer */
4476 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4477 ap
->print_id
, qc
->dev
->devno
, status
);
4479 WARN_ON(qc
->err_mask
);
4481 ap
->hsm_task_state
= HSM_ST_IDLE
;
4483 /* complete taskfile transaction */
4484 ata_hsm_qc_complete(qc
, in_wq
);
4490 /* make sure qc->err_mask is available to
4491 * know what's wrong and recover
4493 WARN_ON(qc
->err_mask
== 0);
4495 ap
->hsm_task_state
= HSM_ST_IDLE
;
4497 /* complete taskfile transaction */
4498 ata_hsm_qc_complete(qc
, in_wq
);
4510 static void ata_pio_task(struct work_struct
*work
)
4512 struct ata_port
*ap
=
4513 container_of(work
, struct ata_port
, port_task
.work
);
4514 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
4519 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4522 * This is purely heuristic. This is a fast path.
4523 * Sometimes when we enter, BSY will be cleared in
4524 * a chk-status or two. If not, the drive is probably seeking
4525 * or something. Snooze for a couple msecs, then
4526 * chk-status again. If still busy, queue delayed work.
4528 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4529 if (status
& ATA_BUSY
) {
4531 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4532 if (status
& ATA_BUSY
) {
4533 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4539 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4541 /* another command or interrupt handler
4542 * may be running at this point.
4549 * ata_qc_new - Request an available ATA command, for queueing
4550 * @ap: Port associated with device @dev
4551 * @dev: Device from whom we request an available command structure
4557 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4559 struct ata_queued_cmd
*qc
= NULL
;
4562 /* no command while frozen */
4563 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4566 /* the last tag is reserved for internal command. */
4567 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4568 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4569 qc
= __ata_qc_from_tag(ap
, i
);
4580 * ata_qc_new_init - Request an available ATA command, and initialize it
4581 * @dev: Device from whom we request an available command structure
4587 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4589 struct ata_port
*ap
= dev
->ap
;
4590 struct ata_queued_cmd
*qc
;
4592 qc
= ata_qc_new(ap
);
4605 * ata_qc_free - free unused ata_queued_cmd
4606 * @qc: Command to complete
4608 * Designed to free unused ata_queued_cmd object
4609 * in case something prevents using it.
4612 * spin_lock_irqsave(host lock)
4614 void ata_qc_free(struct ata_queued_cmd
*qc
)
4616 struct ata_port
*ap
= qc
->ap
;
4619 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4623 if (likely(ata_tag_valid(tag
))) {
4624 qc
->tag
= ATA_TAG_POISON
;
4625 clear_bit(tag
, &ap
->qc_allocated
);
4629 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4631 struct ata_port
*ap
= qc
->ap
;
4633 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4634 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4636 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4639 /* command should be marked inactive atomically with qc completion */
4640 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4641 ap
->sactive
&= ~(1 << qc
->tag
);
4643 ap
->active_tag
= ATA_TAG_POISON
;
4645 /* atapi: mark qc as inactive to prevent the interrupt handler
4646 * from completing the command twice later, before the error handler
4647 * is called. (when rc != 0 and atapi request sense is needed)
4649 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4650 ap
->qc_active
&= ~(1 << qc
->tag
);
4652 /* call completion callback */
4653 qc
->complete_fn(qc
);
4656 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4658 struct ata_port
*ap
= qc
->ap
;
4660 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4661 qc
->result_tf
.flags
= qc
->tf
.flags
;
4665 * ata_qc_complete - Complete an active ATA command
4666 * @qc: Command to complete
4667 * @err_mask: ATA Status register contents
4669 * Indicate to the mid and upper layers that an ATA
4670 * command has completed, with either an ok or not-ok status.
4673 * spin_lock_irqsave(host lock)
4675 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4677 struct ata_port
*ap
= qc
->ap
;
4679 /* XXX: New EH and old EH use different mechanisms to
4680 * synchronize EH with regular execution path.
4682 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4683 * Normal execution path is responsible for not accessing a
4684 * failed qc. libata core enforces the rule by returning NULL
4685 * from ata_qc_from_tag() for failed qcs.
4687 * Old EH depends on ata_qc_complete() nullifying completion
4688 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4689 * not synchronize with interrupt handler. Only PIO task is
4692 if (ap
->ops
->error_handler
) {
4693 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4695 if (unlikely(qc
->err_mask
))
4696 qc
->flags
|= ATA_QCFLAG_FAILED
;
4698 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4699 if (!ata_tag_internal(qc
->tag
)) {
4700 /* always fill result TF for failed qc */
4702 ata_qc_schedule_eh(qc
);
4707 /* read result TF if requested */
4708 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4711 __ata_qc_complete(qc
);
4713 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4716 /* read result TF if failed or requested */
4717 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4720 __ata_qc_complete(qc
);
4725 * ata_qc_complete_multiple - Complete multiple qcs successfully
4726 * @ap: port in question
4727 * @qc_active: new qc_active mask
4728 * @finish_qc: LLDD callback invoked before completing a qc
4730 * Complete in-flight commands. This functions is meant to be
4731 * called from low-level driver's interrupt routine to complete
4732 * requests normally. ap->qc_active and @qc_active is compared
4733 * and commands are completed accordingly.
4736 * spin_lock_irqsave(host lock)
4739 * Number of completed commands on success, -errno otherwise.
4741 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4742 void (*finish_qc
)(struct ata_queued_cmd
*))
4748 done_mask
= ap
->qc_active
^ qc_active
;
4750 if (unlikely(done_mask
& qc_active
)) {
4751 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4752 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4756 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4757 struct ata_queued_cmd
*qc
;
4759 if (!(done_mask
& (1 << i
)))
4762 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4765 ata_qc_complete(qc
);
4773 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4775 struct ata_port
*ap
= qc
->ap
;
4777 switch (qc
->tf
.protocol
) {
4780 case ATA_PROT_ATAPI_DMA
:
4783 case ATA_PROT_ATAPI
:
4785 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4798 * ata_qc_issue - issue taskfile to device
4799 * @qc: command to issue to device
4801 * Prepare an ATA command to submission to device.
4802 * This includes mapping the data into a DMA-able
4803 * area, filling in the S/G table, and finally
4804 * writing the taskfile to hardware, starting the command.
4807 * spin_lock_irqsave(host lock)
4809 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4811 struct ata_port
*ap
= qc
->ap
;
4813 /* Make sure only one non-NCQ command is outstanding. The
4814 * check is skipped for old EH because it reuses active qc to
4815 * request ATAPI sense.
4817 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4819 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4820 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4821 ap
->sactive
|= 1 << qc
->tag
;
4823 WARN_ON(ap
->sactive
);
4824 ap
->active_tag
= qc
->tag
;
4827 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4828 ap
->qc_active
|= 1 << qc
->tag
;
4830 if (ata_should_dma_map(qc
)) {
4831 if (qc
->flags
& ATA_QCFLAG_SG
) {
4832 if (ata_sg_setup(qc
))
4834 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4835 if (ata_sg_setup_one(qc
))
4839 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4842 ap
->ops
->qc_prep(qc
);
4844 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4845 if (unlikely(qc
->err_mask
))
4850 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4851 qc
->err_mask
|= AC_ERR_SYSTEM
;
4853 ata_qc_complete(qc
);
4857 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4858 * @qc: command to issue to device
4860 * Using various libata functions and hooks, this function
4861 * starts an ATA command. ATA commands are grouped into
4862 * classes called "protocols", and issuing each type of protocol
4863 * is slightly different.
4865 * May be used as the qc_issue() entry in ata_port_operations.
4868 * spin_lock_irqsave(host lock)
4871 * Zero on success, AC_ERR_* mask on failure
4874 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4876 struct ata_port
*ap
= qc
->ap
;
4878 /* Use polling pio if the LLD doesn't handle
4879 * interrupt driven pio and atapi CDB interrupt.
4881 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4882 switch (qc
->tf
.protocol
) {
4884 case ATA_PROT_NODATA
:
4885 case ATA_PROT_ATAPI
:
4886 case ATA_PROT_ATAPI_NODATA
:
4887 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4889 case ATA_PROT_ATAPI_DMA
:
4890 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4891 /* see ata_dma_blacklisted() */
4899 /* Some controllers show flaky interrupt behavior after
4900 * setting xfer mode. Use polling instead.
4902 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
4903 qc
->tf
.feature
== SETFEATURES_XFER
) &&
4904 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
4905 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4907 /* select the device */
4908 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4910 /* start the command */
4911 switch (qc
->tf
.protocol
) {
4912 case ATA_PROT_NODATA
:
4913 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4914 ata_qc_set_polling(qc
);
4916 ata_tf_to_host(ap
, &qc
->tf
);
4917 ap
->hsm_task_state
= HSM_ST_LAST
;
4919 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4920 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4925 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4927 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4928 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4929 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4930 ap
->hsm_task_state
= HSM_ST_LAST
;
4934 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4935 ata_qc_set_polling(qc
);
4937 ata_tf_to_host(ap
, &qc
->tf
);
4939 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4940 /* PIO data out protocol */
4941 ap
->hsm_task_state
= HSM_ST_FIRST
;
4942 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4944 /* always send first data block using
4945 * the ata_pio_task() codepath.
4948 /* PIO data in protocol */
4949 ap
->hsm_task_state
= HSM_ST
;
4951 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4952 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4954 /* if polling, ata_pio_task() handles the rest.
4955 * otherwise, interrupt handler takes over from here.
4961 case ATA_PROT_ATAPI
:
4962 case ATA_PROT_ATAPI_NODATA
:
4963 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4964 ata_qc_set_polling(qc
);
4966 ata_tf_to_host(ap
, &qc
->tf
);
4968 ap
->hsm_task_state
= HSM_ST_FIRST
;
4970 /* send cdb by polling if no cdb interrupt */
4971 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4972 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4973 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4976 case ATA_PROT_ATAPI_DMA
:
4977 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4979 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4980 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4981 ap
->hsm_task_state
= HSM_ST_FIRST
;
4983 /* send cdb by polling if no cdb interrupt */
4984 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4985 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4990 return AC_ERR_SYSTEM
;
4997 * ata_host_intr - Handle host interrupt for given (port, task)
4998 * @ap: Port on which interrupt arrived (possibly...)
4999 * @qc: Taskfile currently active in engine
5001 * Handle host interrupt for given queued command. Currently,
5002 * only DMA interrupts are handled. All other commands are
5003 * handled via polling with interrupts disabled (nIEN bit).
5006 * spin_lock_irqsave(host lock)
5009 * One if interrupt was handled, zero if not (shared irq).
5012 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5013 struct ata_queued_cmd
*qc
)
5015 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5016 u8 status
, host_stat
= 0;
5018 VPRINTK("ata%u: protocol %d task_state %d\n",
5019 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5021 /* Check whether we are expecting interrupt in this state */
5022 switch (ap
->hsm_task_state
) {
5024 /* Some pre-ATAPI-4 devices assert INTRQ
5025 * at this state when ready to receive CDB.
5028 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5029 * The flag was turned on only for atapi devices.
5030 * No need to check is_atapi_taskfile(&qc->tf) again.
5032 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5036 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5037 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5038 /* check status of DMA engine */
5039 host_stat
= ap
->ops
->bmdma_status(ap
);
5040 VPRINTK("ata%u: host_stat 0x%X\n",
5041 ap
->print_id
, host_stat
);
5043 /* if it's not our irq... */
5044 if (!(host_stat
& ATA_DMA_INTR
))
5047 /* before we do anything else, clear DMA-Start bit */
5048 ap
->ops
->bmdma_stop(qc
);
5050 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5051 /* error when transfering data to/from memory */
5052 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5053 ap
->hsm_task_state
= HSM_ST_ERR
;
5063 /* check altstatus */
5064 status
= ata_altstatus(ap
);
5065 if (status
& ATA_BUSY
)
5068 /* check main status, clearing INTRQ */
5069 status
= ata_chk_status(ap
);
5070 if (unlikely(status
& ATA_BUSY
))
5073 /* ack bmdma irq events */
5074 ap
->ops
->irq_clear(ap
);
5076 ata_hsm_move(ap
, qc
, status
, 0);
5078 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5079 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5080 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5082 return 1; /* irq handled */
5085 ap
->stats
.idle_irq
++;
5088 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5089 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5090 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5094 return 0; /* irq not handled */
5098 * ata_interrupt - Default ATA host interrupt handler
5099 * @irq: irq line (unused)
5100 * @dev_instance: pointer to our ata_host information structure
5102 * Default interrupt handler for PCI IDE devices. Calls
5103 * ata_host_intr() for each port that is not disabled.
5106 * Obtains host lock during operation.
5109 * IRQ_NONE or IRQ_HANDLED.
5112 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5114 struct ata_host
*host
= dev_instance
;
5116 unsigned int handled
= 0;
5117 unsigned long flags
;
5119 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5120 spin_lock_irqsave(&host
->lock
, flags
);
5122 for (i
= 0; i
< host
->n_ports
; i
++) {
5123 struct ata_port
*ap
;
5125 ap
= host
->ports
[i
];
5127 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5128 struct ata_queued_cmd
*qc
;
5130 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5131 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5132 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5133 handled
|= ata_host_intr(ap
, qc
);
5137 spin_unlock_irqrestore(&host
->lock
, flags
);
5139 return IRQ_RETVAL(handled
);
5143 * sata_scr_valid - test whether SCRs are accessible
5144 * @ap: ATA port to test SCR accessibility for
5146 * Test whether SCRs are accessible for @ap.
5152 * 1 if SCRs are accessible, 0 otherwise.
5154 int sata_scr_valid(struct ata_port
*ap
)
5156 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5160 * sata_scr_read - read SCR register of the specified port
5161 * @ap: ATA port to read SCR for
5163 * @val: Place to store read value
5165 * Read SCR register @reg of @ap into *@val. This function is
5166 * guaranteed to succeed if the cable type of the port is SATA
5167 * and the port implements ->scr_read.
5173 * 0 on success, negative errno on failure.
5175 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5177 if (sata_scr_valid(ap
)) {
5178 *val
= ap
->ops
->scr_read(ap
, reg
);
5185 * sata_scr_write - write SCR register of the specified port
5186 * @ap: ATA port to write SCR for
5187 * @reg: SCR to write
5188 * @val: value to write
5190 * Write @val to SCR register @reg of @ap. This function is
5191 * guaranteed to succeed if the cable type of the port is SATA
5192 * and the port implements ->scr_read.
5198 * 0 on success, negative errno on failure.
5200 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5202 if (sata_scr_valid(ap
)) {
5203 ap
->ops
->scr_write(ap
, reg
, val
);
5210 * sata_scr_write_flush - write SCR register of the specified port and flush
5211 * @ap: ATA port to write SCR for
5212 * @reg: SCR to write
5213 * @val: value to write
5215 * This function is identical to sata_scr_write() except that this
5216 * function performs flush after writing to the register.
5222 * 0 on success, negative errno on failure.
5224 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5226 if (sata_scr_valid(ap
)) {
5227 ap
->ops
->scr_write(ap
, reg
, val
);
5228 ap
->ops
->scr_read(ap
, reg
);
5235 * ata_port_online - test whether the given port is online
5236 * @ap: ATA port to test
5238 * Test whether @ap is online. Note that this function returns 0
5239 * if online status of @ap cannot be obtained, so
5240 * ata_port_online(ap) != !ata_port_offline(ap).
5246 * 1 if the port online status is available and online.
5248 int ata_port_online(struct ata_port
*ap
)
5252 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5258 * ata_port_offline - test whether the given port is offline
5259 * @ap: ATA port to test
5261 * Test whether @ap is offline. Note that this function returns
5262 * 0 if offline status of @ap cannot be obtained, so
5263 * ata_port_online(ap) != !ata_port_offline(ap).
5269 * 1 if the port offline status is available and offline.
5271 int ata_port_offline(struct ata_port
*ap
)
5275 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5280 int ata_flush_cache(struct ata_device
*dev
)
5282 unsigned int err_mask
;
5285 if (!ata_try_flush_cache(dev
))
5288 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5289 cmd
= ATA_CMD_FLUSH_EXT
;
5291 cmd
= ATA_CMD_FLUSH
;
5293 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5295 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5302 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5303 unsigned int action
, unsigned int ehi_flags
,
5306 unsigned long flags
;
5309 for (i
= 0; i
< host
->n_ports
; i
++) {
5310 struct ata_port
*ap
= host
->ports
[i
];
5312 /* Previous resume operation might still be in
5313 * progress. Wait for PM_PENDING to clear.
5315 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5316 ata_port_wait_eh(ap
);
5317 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5320 /* request PM ops to EH */
5321 spin_lock_irqsave(ap
->lock
, flags
);
5326 ap
->pm_result
= &rc
;
5329 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5330 ap
->eh_info
.action
|= action
;
5331 ap
->eh_info
.flags
|= ehi_flags
;
5333 ata_port_schedule_eh(ap
);
5335 spin_unlock_irqrestore(ap
->lock
, flags
);
5337 /* wait and check result */
5339 ata_port_wait_eh(ap
);
5340 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5350 * ata_host_suspend - suspend host
5351 * @host: host to suspend
5354 * Suspend @host. Actual operation is performed by EH. This
5355 * function requests EH to perform PM operations and waits for EH
5359 * Kernel thread context (may sleep).
5362 * 0 on success, -errno on failure.
5364 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5368 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5372 /* EH is quiescent now. Fail if we have any ready device.
5373 * This happens if hotplug occurs between completion of device
5374 * suspension and here.
5376 for (i
= 0; i
< host
->n_ports
; i
++) {
5377 struct ata_port
*ap
= host
->ports
[i
];
5379 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5380 struct ata_device
*dev
= &ap
->device
[j
];
5382 if (ata_dev_ready(dev
)) {
5383 ata_port_printk(ap
, KERN_WARNING
,
5384 "suspend failed, device %d "
5385 "still active\n", dev
->devno
);
5392 host
->dev
->power
.power_state
= mesg
;
5396 ata_host_resume(host
);
5401 * ata_host_resume - resume host
5402 * @host: host to resume
5404 * Resume @host. Actual operation is performed by EH. This
5405 * function requests EH to perform PM operations and returns.
5406 * Note that all resume operations are performed parallely.
5409 * Kernel thread context (may sleep).
5411 void ata_host_resume(struct ata_host
*host
)
5413 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5414 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5415 host
->dev
->power
.power_state
= PMSG_ON
;
5419 * ata_port_start - Set port up for dma.
5420 * @ap: Port to initialize
5422 * Called just after data structures for each port are
5423 * initialized. Allocates space for PRD table.
5425 * May be used as the port_start() entry in ata_port_operations.
5428 * Inherited from caller.
5430 int ata_port_start(struct ata_port
*ap
)
5432 struct device
*dev
= ap
->dev
;
5435 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5440 rc
= ata_pad_alloc(ap
, dev
);
5444 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5445 (unsigned long long)ap
->prd_dma
);
5450 * ata_dev_init - Initialize an ata_device structure
5451 * @dev: Device structure to initialize
5453 * Initialize @dev in preparation for probing.
5456 * Inherited from caller.
5458 void ata_dev_init(struct ata_device
*dev
)
5460 struct ata_port
*ap
= dev
->ap
;
5461 unsigned long flags
;
5463 /* SATA spd limit is bound to the first device */
5464 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5466 /* High bits of dev->flags are used to record warm plug
5467 * requests which occur asynchronously. Synchronize using
5470 spin_lock_irqsave(ap
->lock
, flags
);
5471 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5472 spin_unlock_irqrestore(ap
->lock
, flags
);
5474 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5475 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5476 dev
->pio_mask
= UINT_MAX
;
5477 dev
->mwdma_mask
= UINT_MAX
;
5478 dev
->udma_mask
= UINT_MAX
;
5482 * ata_port_init - Initialize an ata_port structure
5483 * @ap: Structure to initialize
5484 * @host: Collection of hosts to which @ap belongs
5485 * @ent: Probe information provided by low-level driver
5486 * @port_no: Port number associated with this ata_port
5488 * Initialize a new ata_port structure.
5491 * Inherited from caller.
5493 void ata_port_init(struct ata_port
*ap
, struct ata_host
*host
,
5494 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5498 ap
->lock
= &host
->lock
;
5499 ap
->flags
= ATA_FLAG_DISABLED
;
5500 ap
->print_id
= ata_print_id
++;
5501 ap
->ctl
= ATA_DEVCTL_OBS
;
5504 ap
->port_no
= port_no
;
5505 if (port_no
== 1 && ent
->pinfo2
) {
5506 ap
->pio_mask
= ent
->pinfo2
->pio_mask
;
5507 ap
->mwdma_mask
= ent
->pinfo2
->mwdma_mask
;
5508 ap
->udma_mask
= ent
->pinfo2
->udma_mask
;
5509 ap
->flags
|= ent
->pinfo2
->flags
;
5510 ap
->ops
= ent
->pinfo2
->port_ops
;
5512 ap
->pio_mask
= ent
->pio_mask
;
5513 ap
->mwdma_mask
= ent
->mwdma_mask
;
5514 ap
->udma_mask
= ent
->udma_mask
;
5515 ap
->flags
|= ent
->port_flags
;
5516 ap
->ops
= ent
->port_ops
;
5518 ap
->hw_sata_spd_limit
= UINT_MAX
;
5519 ap
->active_tag
= ATA_TAG_POISON
;
5520 ap
->last_ctl
= 0xFF;
5522 #if defined(ATA_VERBOSE_DEBUG)
5523 /* turn on all debugging levels */
5524 ap
->msg_enable
= 0x00FF;
5525 #elif defined(ATA_DEBUG)
5526 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5528 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5531 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5532 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5533 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5534 INIT_LIST_HEAD(&ap
->eh_done_q
);
5535 init_waitqueue_head(&ap
->eh_wait_q
);
5537 /* set cable type */
5538 ap
->cbl
= ATA_CBL_NONE
;
5539 if (ap
->flags
& ATA_FLAG_SATA
)
5540 ap
->cbl
= ATA_CBL_SATA
;
5542 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5543 struct ata_device
*dev
= &ap
->device
[i
];
5550 ap
->stats
.unhandled_irq
= 1;
5551 ap
->stats
.idle_irq
= 1;
5554 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5558 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5559 * @ap: ATA port to initialize SCSI host for
5560 * @shost: SCSI host associated with @ap
5562 * Initialize SCSI host @shost associated with ATA port @ap.
5565 * Inherited from caller.
5567 static void ata_port_init_shost(struct ata_port
*ap
, struct Scsi_Host
*shost
)
5569 ap
->scsi_host
= shost
;
5571 shost
->unique_id
= ap
->print_id
;
5574 shost
->max_channel
= 1;
5575 shost
->max_cmd_len
= 12;
5579 * ata_port_add - Attach low-level ATA driver to system
5580 * @ent: Information provided by low-level driver
5581 * @host: Collections of ports to which we add
5582 * @port_no: Port number associated with this host
5584 * Attach low-level ATA driver to system.
5587 * PCI/etc. bus probe sem.
5590 * New ata_port on success, for NULL on error.
5592 static struct ata_port
* ata_port_add(const struct ata_probe_ent
*ent
,
5593 struct ata_host
*host
,
5594 unsigned int port_no
)
5596 struct Scsi_Host
*shost
;
5597 struct ata_port
*ap
;
5601 if (!ent
->port_ops
->error_handler
&&
5602 !(ent
->port_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5603 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5608 shost
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5612 shost
->transportt
= &ata_scsi_transport_template
;
5614 ap
= ata_shost_to_port(shost
);
5616 ata_port_init(ap
, host
, ent
, port_no
);
5617 ata_port_init_shost(ap
, shost
);
5622 static void ata_host_release(struct device
*gendev
, void *res
)
5624 struct ata_host
*host
= dev_get_drvdata(gendev
);
5627 for (i
= 0; i
< host
->n_ports
; i
++) {
5628 struct ata_port
*ap
= host
->ports
[i
];
5633 if (ap
->ops
->port_stop
)
5634 ap
->ops
->port_stop(ap
);
5636 scsi_host_put(ap
->scsi_host
);
5639 if (host
->ops
->host_stop
)
5640 host
->ops
->host_stop(host
);
5644 * ata_sas_host_init - Initialize a host struct
5645 * @host: host to initialize
5646 * @dev: device host is attached to
5647 * @flags: host flags
5651 * PCI/etc. bus probe sem.
5655 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5656 unsigned long flags
, const struct ata_port_operations
*ops
)
5658 spin_lock_init(&host
->lock
);
5660 host
->flags
= flags
;
5665 * ata_device_add - Register hardware device with ATA and SCSI layers
5666 * @ent: Probe information describing hardware device to be registered
5668 * This function processes the information provided in the probe
5669 * information struct @ent, allocates the necessary ATA and SCSI
5670 * host information structures, initializes them, and registers
5671 * everything with requisite kernel subsystems.
5673 * This function requests irqs, probes the ATA bus, and probes
5677 * PCI/etc. bus probe sem.
5680 * Number of ports registered. Zero on error (no ports registered).
5682 int ata_device_add(const struct ata_probe_ent
*ent
)
5685 struct device
*dev
= ent
->dev
;
5686 struct ata_host
*host
;
5691 if (ent
->irq
== 0) {
5692 dev_printk(KERN_ERR
, dev
, "is not available: No interrupt assigned.\n");
5696 if (!devres_open_group(dev
, ata_device_add
, GFP_KERNEL
))
5699 /* alloc a container for our list of ATA ports (buses) */
5700 host
= devres_alloc(ata_host_release
, sizeof(struct ata_host
) +
5701 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5704 devres_add(dev
, host
);
5705 dev_set_drvdata(dev
, host
);
5707 ata_host_init(host
, dev
, ent
->_host_flags
, ent
->port_ops
);
5708 host
->n_ports
= ent
->n_ports
;
5709 host
->irq
= ent
->irq
;
5710 host
->irq2
= ent
->irq2
;
5711 host
->iomap
= ent
->iomap
;
5712 host
->private_data
= ent
->private_data
;
5714 /* register each port bound to this device */
5715 for (i
= 0; i
< host
->n_ports
; i
++) {
5716 struct ata_port
*ap
;
5717 unsigned long xfer_mode_mask
;
5718 int irq_line
= ent
->irq
;
5720 ap
= ata_port_add(ent
, host
, i
);
5721 host
->ports
[i
] = ap
;
5726 if (ent
->dummy_port_mask
& (1 << i
)) {
5727 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5728 ap
->ops
= &ata_dummy_port_ops
;
5733 rc
= ap
->ops
->port_start(ap
);
5735 host
->ports
[i
] = NULL
;
5736 scsi_host_put(ap
->scsi_host
);
5740 /* Report the secondary IRQ for second channel legacy */
5741 if (i
== 1 && ent
->irq2
)
5742 irq_line
= ent
->irq2
;
5744 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5745 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5746 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5748 /* print per-port info to dmesg */
5749 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
5750 "ctl 0x%p bmdma 0x%p irq %d\n",
5751 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5752 ata_mode_string(xfer_mode_mask
),
5753 ap
->ioaddr
.cmd_addr
,
5754 ap
->ioaddr
.ctl_addr
,
5755 ap
->ioaddr
.bmdma_addr
,
5758 /* freeze port before requesting IRQ */
5759 ata_eh_freeze_port(ap
);
5762 /* obtain irq, that may be shared between channels */
5763 rc
= devm_request_irq(dev
, ent
->irq
, ent
->port_ops
->irq_handler
,
5764 ent
->irq_flags
, DRV_NAME
, host
);
5766 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5771 /* do we have a second IRQ for the other channel, eg legacy mode */
5773 /* We will get weird core code crashes later if this is true
5775 BUG_ON(ent
->irq
== ent
->irq2
);
5777 rc
= devm_request_irq(dev
, ent
->irq2
,
5778 ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5781 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5787 /* resource acquisition complete */
5788 devres_remove_group(dev
, ata_device_add
);
5790 /* perform each probe synchronously */
5791 DPRINTK("probe begin\n");
5792 for (i
= 0; i
< host
->n_ports
; i
++) {
5793 struct ata_port
*ap
= host
->ports
[i
];
5797 /* init sata_spd_limit to the current value */
5798 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
5799 int spd
= (scontrol
>> 4) & 0xf;
5800 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5802 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5804 rc
= scsi_add_host(ap
->scsi_host
, dev
);
5806 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5807 /* FIXME: do something useful here */
5808 /* FIXME: handle unconditional calls to
5809 * scsi_scan_host and ata_host_remove, below,
5814 if (ap
->ops
->error_handler
) {
5815 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5816 unsigned long flags
;
5820 /* kick EH for boot probing */
5821 spin_lock_irqsave(ap
->lock
, flags
);
5823 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
5824 ehi
->action
|= ATA_EH_SOFTRESET
;
5825 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5827 ap
->pflags
|= ATA_PFLAG_LOADING
;
5828 ata_port_schedule_eh(ap
);
5830 spin_unlock_irqrestore(ap
->lock
, flags
);
5832 /* wait for EH to finish */
5833 ata_port_wait_eh(ap
);
5835 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5836 rc
= ata_bus_probe(ap
);
5837 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5840 /* FIXME: do something useful here?
5841 * Current libata behavior will
5842 * tear down everything when
5843 * the module is removed
5844 * or the h/w is unplugged.
5850 /* probes are done, now scan each port's disk(s) */
5851 DPRINTK("host probe begin\n");
5852 for (i
= 0; i
< host
->n_ports
; i
++) {
5853 struct ata_port
*ap
= host
->ports
[i
];
5855 ata_scsi_scan_host(ap
);
5858 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5859 return ent
->n_ports
; /* success */
5862 devres_release_group(dev
, ata_device_add
);
5863 dev_set_drvdata(dev
, NULL
);
5864 VPRINTK("EXIT, returning %d\n", rc
);
5869 * ata_port_detach - Detach ATA port in prepration of device removal
5870 * @ap: ATA port to be detached
5872 * Detach all ATA devices and the associated SCSI devices of @ap;
5873 * then, remove the associated SCSI host. @ap is guaranteed to
5874 * be quiescent on return from this function.
5877 * Kernel thread context (may sleep).
5879 void ata_port_detach(struct ata_port
*ap
)
5881 unsigned long flags
;
5884 if (!ap
->ops
->error_handler
)
5887 /* tell EH we're leaving & flush EH */
5888 spin_lock_irqsave(ap
->lock
, flags
);
5889 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5890 spin_unlock_irqrestore(ap
->lock
, flags
);
5892 ata_port_wait_eh(ap
);
5894 /* EH is now guaranteed to see UNLOADING, so no new device
5895 * will be attached. Disable all existing devices.
5897 spin_lock_irqsave(ap
->lock
, flags
);
5899 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
5900 ata_dev_disable(&ap
->device
[i
]);
5902 spin_unlock_irqrestore(ap
->lock
, flags
);
5904 /* Final freeze & EH. All in-flight commands are aborted. EH
5905 * will be skipped and retrials will be terminated with bad
5908 spin_lock_irqsave(ap
->lock
, flags
);
5909 ata_port_freeze(ap
); /* won't be thawed */
5910 spin_unlock_irqrestore(ap
->lock
, flags
);
5912 ata_port_wait_eh(ap
);
5914 /* Flush hotplug task. The sequence is similar to
5915 * ata_port_flush_task().
5917 flush_workqueue(ata_aux_wq
);
5918 cancel_delayed_work(&ap
->hotplug_task
);
5919 flush_workqueue(ata_aux_wq
);
5922 /* remove the associated SCSI host */
5923 scsi_remove_host(ap
->scsi_host
);
5927 * ata_host_detach - Detach all ports of an ATA host
5928 * @host: Host to detach
5930 * Detach all ports of @host.
5933 * Kernel thread context (may sleep).
5935 void ata_host_detach(struct ata_host
*host
)
5939 for (i
= 0; i
< host
->n_ports
; i
++)
5940 ata_port_detach(host
->ports
[i
]);
5943 struct ata_probe_ent
*
5944 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
5946 struct ata_probe_ent
*probe_ent
;
5948 probe_ent
= devm_kzalloc(dev
, sizeof(*probe_ent
), GFP_KERNEL
);
5950 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
5951 kobject_name(&(dev
->kobj
)));
5955 INIT_LIST_HEAD(&probe_ent
->node
);
5956 probe_ent
->dev
= dev
;
5958 probe_ent
->sht
= port
->sht
;
5959 probe_ent
->port_flags
= port
->flags
;
5960 probe_ent
->pio_mask
= port
->pio_mask
;
5961 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
5962 probe_ent
->udma_mask
= port
->udma_mask
;
5963 probe_ent
->port_ops
= port
->port_ops
;
5964 probe_ent
->private_data
= port
->private_data
;
5970 * ata_std_ports - initialize ioaddr with standard port offsets.
5971 * @ioaddr: IO address structure to be initialized
5973 * Utility function which initializes data_addr, error_addr,
5974 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5975 * device_addr, status_addr, and command_addr to standard offsets
5976 * relative to cmd_addr.
5978 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5981 void ata_std_ports(struct ata_ioports
*ioaddr
)
5983 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
5984 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
5985 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
5986 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
5987 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
5988 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
5989 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
5990 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
5991 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
5992 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
5999 * ata_pci_remove_one - PCI layer callback for device removal
6000 * @pdev: PCI device that was removed
6002 * PCI layer indicates to libata via this hook that hot-unplug or
6003 * module unload event has occurred. Detach all ports. Resource
6004 * release is handled via devres.
6007 * Inherited from PCI layer (may sleep).
6009 void ata_pci_remove_one(struct pci_dev
*pdev
)
6011 struct device
*dev
= pci_dev_to_dev(pdev
);
6012 struct ata_host
*host
= dev_get_drvdata(dev
);
6014 ata_host_detach(host
);
6017 /* move to PCI subsystem */
6018 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6020 unsigned long tmp
= 0;
6022 switch (bits
->width
) {
6025 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6031 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6037 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6048 return (tmp
== bits
->val
) ? 1 : 0;
6051 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6053 pci_save_state(pdev
);
6054 pci_disable_device(pdev
);
6056 if (mesg
.event
== PM_EVENT_SUSPEND
)
6057 pci_set_power_state(pdev
, PCI_D3hot
);
6060 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6064 pci_set_power_state(pdev
, PCI_D0
);
6065 pci_restore_state(pdev
);
6067 rc
= pcim_enable_device(pdev
);
6069 dev_printk(KERN_ERR
, &pdev
->dev
,
6070 "failed to enable device after resume (%d)\n", rc
);
6074 pci_set_master(pdev
);
6078 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6080 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6083 rc
= ata_host_suspend(host
, mesg
);
6087 ata_pci_device_do_suspend(pdev
, mesg
);
6092 int ata_pci_device_resume(struct pci_dev
*pdev
)
6094 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6097 rc
= ata_pci_device_do_resume(pdev
);
6099 ata_host_resume(host
);
6102 #endif /* CONFIG_PCI */
6105 static int __init
ata_init(void)
6107 ata_probe_timeout
*= HZ
;
6108 ata_wq
= create_workqueue("ata");
6112 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6114 destroy_workqueue(ata_wq
);
6118 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6122 static void __exit
ata_exit(void)
6124 destroy_workqueue(ata_wq
);
6125 destroy_workqueue(ata_aux_wq
);
6128 subsys_initcall(ata_init
);
6129 module_exit(ata_exit
);
6131 static unsigned long ratelimit_time
;
6132 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6134 int ata_ratelimit(void)
6137 unsigned long flags
;
6139 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6141 if (time_after(jiffies
, ratelimit_time
)) {
6143 ratelimit_time
= jiffies
+ (HZ
/5);
6147 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6153 * ata_wait_register - wait until register value changes
6154 * @reg: IO-mapped register
6155 * @mask: Mask to apply to read register value
6156 * @val: Wait condition
6157 * @interval_msec: polling interval in milliseconds
6158 * @timeout_msec: timeout in milliseconds
6160 * Waiting for some bits of register to change is a common
6161 * operation for ATA controllers. This function reads 32bit LE
6162 * IO-mapped register @reg and tests for the following condition.
6164 * (*@reg & mask) != val
6166 * If the condition is met, it returns; otherwise, the process is
6167 * repeated after @interval_msec until timeout.
6170 * Kernel thread context (may sleep)
6173 * The final register value.
6175 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6176 unsigned long interval_msec
,
6177 unsigned long timeout_msec
)
6179 unsigned long timeout
;
6182 tmp
= ioread32(reg
);
6184 /* Calculate timeout _after_ the first read to make sure
6185 * preceding writes reach the controller before starting to
6186 * eat away the timeout.
6188 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6190 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6191 msleep(interval_msec
);
6192 tmp
= ioread32(reg
);
6201 static void ata_dummy_noret(struct ata_port
*ap
) { }
6202 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6203 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6205 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6210 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6212 return AC_ERR_SYSTEM
;
6215 const struct ata_port_operations ata_dummy_port_ops
= {
6216 .port_disable
= ata_port_disable
,
6217 .check_status
= ata_dummy_check_status
,
6218 .check_altstatus
= ata_dummy_check_status
,
6219 .dev_select
= ata_noop_dev_select
,
6220 .qc_prep
= ata_noop_qc_prep
,
6221 .qc_issue
= ata_dummy_qc_issue
,
6222 .freeze
= ata_dummy_noret
,
6223 .thaw
= ata_dummy_noret
,
6224 .error_handler
= ata_dummy_noret
,
6225 .post_internal_cmd
= ata_dummy_qc_noret
,
6226 .irq_clear
= ata_dummy_noret
,
6227 .port_start
= ata_dummy_ret0
,
6228 .port_stop
= ata_dummy_noret
,
6232 * libata is essentially a library of internal helper functions for
6233 * low-level ATA host controller drivers. As such, the API/ABI is
6234 * likely to change as new drivers are added and updated.
6235 * Do not depend on ABI/API stability.
6238 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6239 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6240 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6241 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6242 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6243 EXPORT_SYMBOL_GPL(ata_std_ports
);
6244 EXPORT_SYMBOL_GPL(ata_host_init
);
6245 EXPORT_SYMBOL_GPL(ata_device_add
);
6246 EXPORT_SYMBOL_GPL(ata_host_detach
);
6247 EXPORT_SYMBOL_GPL(ata_sg_init
);
6248 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6249 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6250 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6251 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6252 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6253 EXPORT_SYMBOL_GPL(ata_tf_load
);
6254 EXPORT_SYMBOL_GPL(ata_tf_read
);
6255 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6256 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6257 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6258 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6259 EXPORT_SYMBOL_GPL(ata_check_status
);
6260 EXPORT_SYMBOL_GPL(ata_altstatus
);
6261 EXPORT_SYMBOL_GPL(ata_exec_command
);
6262 EXPORT_SYMBOL_GPL(ata_port_start
);
6263 EXPORT_SYMBOL_GPL(ata_interrupt
);
6264 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6265 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6266 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6267 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6268 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6269 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6270 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6271 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6272 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6273 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6274 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6275 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6276 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6277 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6278 EXPORT_SYMBOL_GPL(ata_port_probe
);
6279 EXPORT_SYMBOL_GPL(sata_set_spd
);
6280 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6281 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6282 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6283 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6284 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6285 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6286 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6287 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6288 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6289 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6290 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6291 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6292 EXPORT_SYMBOL_GPL(ata_port_disable
);
6293 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6294 EXPORT_SYMBOL_GPL(ata_wait_register
);
6295 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6296 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6297 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6298 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6299 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6300 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6301 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6302 EXPORT_SYMBOL_GPL(ata_host_intr
);
6303 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6304 EXPORT_SYMBOL_GPL(sata_scr_read
);
6305 EXPORT_SYMBOL_GPL(sata_scr_write
);
6306 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6307 EXPORT_SYMBOL_GPL(ata_port_online
);
6308 EXPORT_SYMBOL_GPL(ata_port_offline
);
6309 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6310 EXPORT_SYMBOL_GPL(ata_host_resume
);
6311 EXPORT_SYMBOL_GPL(ata_id_string
);
6312 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6313 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6314 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6316 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6317 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6318 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6321 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6322 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
6323 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6324 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6325 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6326 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6327 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6328 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6329 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6330 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6331 #endif /* CONFIG_PCI */
6333 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6334 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6336 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6337 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6338 EXPORT_SYMBOL_GPL(ata_port_abort
);
6339 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6340 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6341 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6342 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6343 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6344 EXPORT_SYMBOL_GPL(ata_do_eh
);
6345 EXPORT_SYMBOL_GPL(ata_irq_on
);
6346 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6347 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6348 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6349 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);