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_unique_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 ((dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ_OFF
|
319 ATA_DFLAG_NCQ
)) == ATA_DFLAG_NCQ
&&
320 likely(tag
!= ATA_TAG_INTERNAL
)) {
322 if (!lba_48_ok(block
, n_block
))
325 tf
->protocol
= ATA_PROT_NCQ
;
326 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
328 if (tf
->flags
& ATA_TFLAG_WRITE
)
329 tf
->command
= ATA_CMD_FPDMA_WRITE
;
331 tf
->command
= ATA_CMD_FPDMA_READ
;
333 tf
->nsect
= tag
<< 3;
334 tf
->hob_feature
= (n_block
>> 8) & 0xff;
335 tf
->feature
= n_block
& 0xff;
337 tf
->hob_lbah
= (block
>> 40) & 0xff;
338 tf
->hob_lbam
= (block
>> 32) & 0xff;
339 tf
->hob_lbal
= (block
>> 24) & 0xff;
340 tf
->lbah
= (block
>> 16) & 0xff;
341 tf
->lbam
= (block
>> 8) & 0xff;
342 tf
->lbal
= block
& 0xff;
345 if (tf
->flags
& ATA_TFLAG_FUA
)
346 tf
->device
|= 1 << 7;
347 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
348 tf
->flags
|= ATA_TFLAG_LBA
;
350 if (lba_28_ok(block
, n_block
)) {
352 tf
->device
|= (block
>> 24) & 0xf;
353 } else if (lba_48_ok(block
, n_block
)) {
354 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
358 tf
->flags
|= ATA_TFLAG_LBA48
;
360 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
362 tf
->hob_lbah
= (block
>> 40) & 0xff;
363 tf
->hob_lbam
= (block
>> 32) & 0xff;
364 tf
->hob_lbal
= (block
>> 24) & 0xff;
366 /* request too large even for LBA48 */
369 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
372 tf
->nsect
= n_block
& 0xff;
374 tf
->lbah
= (block
>> 16) & 0xff;
375 tf
->lbam
= (block
>> 8) & 0xff;
376 tf
->lbal
= block
& 0xff;
378 tf
->device
|= ATA_LBA
;
381 u32 sect
, head
, cyl
, track
;
383 /* The request -may- be too large for CHS addressing. */
384 if (!lba_28_ok(block
, n_block
))
387 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
390 /* Convert LBA to CHS */
391 track
= (u32
)block
/ dev
->sectors
;
392 cyl
= track
/ dev
->heads
;
393 head
= track
% dev
->heads
;
394 sect
= (u32
)block
% dev
->sectors
+ 1;
396 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
397 (u32
)block
, track
, cyl
, head
, sect
);
399 /* Check whether the converted CHS can fit.
403 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
406 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
417 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
418 * @pio_mask: pio_mask
419 * @mwdma_mask: mwdma_mask
420 * @udma_mask: udma_mask
422 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
423 * unsigned int xfer_mask.
431 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
432 unsigned int mwdma_mask
,
433 unsigned int udma_mask
)
435 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
436 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
437 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
441 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
442 * @xfer_mask: xfer_mask to unpack
443 * @pio_mask: resulting pio_mask
444 * @mwdma_mask: resulting mwdma_mask
445 * @udma_mask: resulting udma_mask
447 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
448 * Any NULL distination masks will be ignored.
450 static void ata_unpack_xfermask(unsigned int xfer_mask
,
451 unsigned int *pio_mask
,
452 unsigned int *mwdma_mask
,
453 unsigned int *udma_mask
)
456 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
458 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
460 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
463 static const struct ata_xfer_ent
{
467 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
468 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
469 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
474 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
475 * @xfer_mask: xfer_mask of interest
477 * Return matching XFER_* value for @xfer_mask. Only the highest
478 * bit of @xfer_mask is considered.
484 * Matching XFER_* value, 0 if no match found.
486 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
488 int highbit
= fls(xfer_mask
) - 1;
489 const struct ata_xfer_ent
*ent
;
491 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
492 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
493 return ent
->base
+ highbit
- ent
->shift
;
498 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
499 * @xfer_mode: XFER_* of interest
501 * Return matching xfer_mask for @xfer_mode.
507 * Matching xfer_mask, 0 if no match found.
509 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
511 const struct ata_xfer_ent
*ent
;
513 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
514 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
515 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
520 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
521 * @xfer_mode: XFER_* of interest
523 * Return matching xfer_shift for @xfer_mode.
529 * Matching xfer_shift, -1 if no match found.
531 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
533 const struct ata_xfer_ent
*ent
;
535 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
536 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
542 * ata_mode_string - convert xfer_mask to string
543 * @xfer_mask: mask of bits supported; only highest bit counts.
545 * Determine string which represents the highest speed
546 * (highest bit in @modemask).
552 * Constant C string representing highest speed listed in
553 * @mode_mask, or the constant C string "<n/a>".
555 static const char *ata_mode_string(unsigned int xfer_mask
)
557 static const char * const xfer_mode_str
[] = {
581 highbit
= fls(xfer_mask
) - 1;
582 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
583 return xfer_mode_str
[highbit
];
587 static const char *sata_spd_string(unsigned int spd
)
589 static const char * const spd_str
[] = {
594 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
596 return spd_str
[spd
- 1];
599 void ata_dev_disable(struct ata_device
*dev
)
601 if (ata_dev_enabled(dev
) && ata_msg_drv(dev
->ap
)) {
602 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
603 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
610 * ata_devchk - PATA device presence detection
611 * @ap: ATA channel to examine
612 * @device: Device to examine (starting at zero)
614 * This technique was originally described in
615 * Hale Landis's ATADRVR (www.ata-atapi.com), and
616 * later found its way into the ATA/ATAPI spec.
618 * Write a pattern to the ATA shadow registers,
619 * and if a device is present, it will respond by
620 * correctly storing and echoing back the
621 * ATA shadow register contents.
627 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
629 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
632 ap
->ops
->dev_select(ap
, device
);
634 iowrite8(0x55, ioaddr
->nsect_addr
);
635 iowrite8(0xaa, ioaddr
->lbal_addr
);
637 iowrite8(0xaa, ioaddr
->nsect_addr
);
638 iowrite8(0x55, ioaddr
->lbal_addr
);
640 iowrite8(0x55, ioaddr
->nsect_addr
);
641 iowrite8(0xaa, ioaddr
->lbal_addr
);
643 nsect
= ioread8(ioaddr
->nsect_addr
);
644 lbal
= ioread8(ioaddr
->lbal_addr
);
646 if ((nsect
== 0x55) && (lbal
== 0xaa))
647 return 1; /* we found a device */
649 return 0; /* nothing found */
653 * ata_dev_classify - determine device type based on ATA-spec signature
654 * @tf: ATA taskfile register set for device to be identified
656 * Determine from taskfile register contents whether a device is
657 * ATA or ATAPI, as per "Signature and persistence" section
658 * of ATA/PI spec (volume 1, sect 5.14).
664 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
665 * the event of failure.
668 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
670 /* Apple's open source Darwin code hints that some devices only
671 * put a proper signature into the LBA mid/high registers,
672 * So, we only check those. It's sufficient for uniqueness.
675 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
676 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
677 DPRINTK("found ATA device by sig\n");
681 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
682 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
683 DPRINTK("found ATAPI device by sig\n");
684 return ATA_DEV_ATAPI
;
687 DPRINTK("unknown device\n");
688 return ATA_DEV_UNKNOWN
;
692 * ata_dev_try_classify - Parse returned ATA device signature
693 * @ap: ATA channel to examine
694 * @device: Device to examine (starting at zero)
695 * @r_err: Value of error register on completion
697 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
698 * an ATA/ATAPI-defined set of values is placed in the ATA
699 * shadow registers, indicating the results of device detection
702 * Select the ATA device, and read the values from the ATA shadow
703 * registers. Then parse according to the Error register value,
704 * and the spec-defined values examined by ata_dev_classify().
710 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
714 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
716 struct ata_taskfile tf
;
720 ap
->ops
->dev_select(ap
, device
);
722 memset(&tf
, 0, sizeof(tf
));
724 ap
->ops
->tf_read(ap
, &tf
);
729 /* see if device passed diags: if master then continue and warn later */
730 if (err
== 0 && device
== 0)
731 /* diagnostic fail : do nothing _YET_ */
732 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
735 else if ((device
== 0) && (err
== 0x81))
740 /* determine if device is ATA or ATAPI */
741 class = ata_dev_classify(&tf
);
743 if (class == ATA_DEV_UNKNOWN
)
745 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
751 * ata_id_string - Convert IDENTIFY DEVICE page into string
752 * @id: IDENTIFY DEVICE results we will examine
753 * @s: string into which data is output
754 * @ofs: offset into identify device page
755 * @len: length of string to return. must be an even number.
757 * The strings in the IDENTIFY DEVICE page are broken up into
758 * 16-bit chunks. Run through the string, and output each
759 * 8-bit chunk linearly, regardless of platform.
765 void ata_id_string(const u16
*id
, unsigned char *s
,
766 unsigned int ofs
, unsigned int len
)
785 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
786 * @id: IDENTIFY DEVICE results we will examine
787 * @s: string into which data is output
788 * @ofs: offset into identify device page
789 * @len: length of string to return. must be an odd number.
791 * This function is identical to ata_id_string except that it
792 * trims trailing spaces and terminates the resulting string with
793 * null. @len must be actual maximum length (even number) + 1.
798 void ata_id_c_string(const u16
*id
, unsigned char *s
,
799 unsigned int ofs
, unsigned int len
)
805 ata_id_string(id
, s
, ofs
, len
- 1);
807 p
= s
+ strnlen(s
, len
- 1);
808 while (p
> s
&& p
[-1] == ' ')
813 static u64
ata_id_n_sectors(const u16
*id
)
815 if (ata_id_has_lba(id
)) {
816 if (ata_id_has_lba48(id
))
817 return ata_id_u64(id
, 100);
819 return ata_id_u32(id
, 60);
821 if (ata_id_current_chs_valid(id
))
822 return ata_id_u32(id
, 57);
824 return id
[1] * id
[3] * id
[6];
829 * ata_noop_dev_select - Select device 0/1 on ATA bus
830 * @ap: ATA channel to manipulate
831 * @device: ATA device (numbered from zero) to select
833 * This function performs no actual function.
835 * May be used as the dev_select() entry in ata_port_operations.
840 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
846 * ata_std_dev_select - Select device 0/1 on ATA bus
847 * @ap: ATA channel to manipulate
848 * @device: ATA device (numbered from zero) to select
850 * Use the method defined in the ATA specification to
851 * make either device 0, or device 1, active on the
852 * ATA channel. Works with both PIO and MMIO.
854 * May be used as the dev_select() entry in ata_port_operations.
860 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
865 tmp
= ATA_DEVICE_OBS
;
867 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
869 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
870 ata_pause(ap
); /* needed; also flushes, for mmio */
874 * ata_dev_select - Select device 0/1 on ATA bus
875 * @ap: ATA channel to manipulate
876 * @device: ATA device (numbered from zero) to select
877 * @wait: non-zero to wait for Status register BSY bit to clear
878 * @can_sleep: non-zero if context allows sleeping
880 * Use the method defined in the ATA specification to
881 * make either device 0, or device 1, active on the
884 * This is a high-level version of ata_std_dev_select(),
885 * which additionally provides the services of inserting
886 * the proper pauses and status polling, where needed.
892 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
893 unsigned int wait
, unsigned int can_sleep
)
895 if (ata_msg_probe(ap
))
896 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, ata%u: "
897 "device %u, wait %u\n", ap
->id
, device
, wait
);
902 ap
->ops
->dev_select(ap
, device
);
905 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
912 * ata_dump_id - IDENTIFY DEVICE info debugging output
913 * @id: IDENTIFY DEVICE page to dump
915 * Dump selected 16-bit words from the given IDENTIFY DEVICE
922 static inline void ata_dump_id(const u16
*id
)
924 DPRINTK("49==0x%04x "
934 DPRINTK("80==0x%04x "
944 DPRINTK("88==0x%04x "
951 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
952 * @id: IDENTIFY data to compute xfer mask from
954 * Compute the xfermask for this device. This is not as trivial
955 * as it seems if we must consider early devices correctly.
957 * FIXME: pre IDE drive timing (do we care ?).
965 static unsigned int ata_id_xfermask(const u16
*id
)
967 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
969 /* Usual case. Word 53 indicates word 64 is valid */
970 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
971 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
975 /* If word 64 isn't valid then Word 51 high byte holds
976 * the PIO timing number for the maximum. Turn it into
979 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
980 if (mode
< 5) /* Valid PIO range */
981 pio_mask
= (2 << mode
) - 1;
985 /* But wait.. there's more. Design your standards by
986 * committee and you too can get a free iordy field to
987 * process. However its the speeds not the modes that
988 * are supported... Note drivers using the timing API
989 * will get this right anyway
993 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
995 if (ata_id_is_cfa(id
)) {
997 * Process compact flash extended modes
999 int pio
= id
[163] & 0x7;
1000 int dma
= (id
[163] >> 3) & 7;
1003 pio_mask
|= (1 << 5);
1005 pio_mask
|= (1 << 6);
1007 mwdma_mask
|= (1 << 3);
1009 mwdma_mask
|= (1 << 4);
1013 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1014 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1016 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1020 * ata_port_queue_task - Queue port_task
1021 * @ap: The ata_port to queue port_task for
1022 * @fn: workqueue function to be scheduled
1023 * @data: data for @fn to use
1024 * @delay: delay time for workqueue function
1026 * Schedule @fn(@data) for execution after @delay jiffies using
1027 * port_task. There is one port_task per port and it's the
1028 * user(low level driver)'s responsibility to make sure that only
1029 * one task is active at any given time.
1031 * libata core layer takes care of synchronization between
1032 * port_task and EH. ata_port_queue_task() may be ignored for EH
1036 * Inherited from caller.
1038 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1039 unsigned long delay
)
1043 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
1046 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1047 ap
->port_task_data
= data
;
1049 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1051 /* rc == 0 means that another user is using port task */
1056 * ata_port_flush_task - Flush port_task
1057 * @ap: The ata_port to flush port_task for
1059 * After this function completes, port_task is guranteed not to
1060 * be running or scheduled.
1063 * Kernel thread context (may sleep)
1065 void ata_port_flush_task(struct ata_port
*ap
)
1067 unsigned long flags
;
1071 spin_lock_irqsave(ap
->lock
, flags
);
1072 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1073 spin_unlock_irqrestore(ap
->lock
, flags
);
1075 DPRINTK("flush #1\n");
1076 flush_workqueue(ata_wq
);
1079 * At this point, if a task is running, it's guaranteed to see
1080 * the FLUSH flag; thus, it will never queue pio tasks again.
1083 if (!cancel_delayed_work(&ap
->port_task
)) {
1084 if (ata_msg_ctl(ap
))
1085 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1087 flush_workqueue(ata_wq
);
1090 spin_lock_irqsave(ap
->lock
, flags
);
1091 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1092 spin_unlock_irqrestore(ap
->lock
, flags
);
1094 if (ata_msg_ctl(ap
))
1095 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1098 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1100 struct completion
*waiting
= qc
->private_data
;
1106 * ata_exec_internal_sg - execute libata internal command
1107 * @dev: Device to which the command is sent
1108 * @tf: Taskfile registers for the command and the result
1109 * @cdb: CDB for packet command
1110 * @dma_dir: Data tranfer direction of the command
1111 * @sg: sg list for the data buffer of the command
1112 * @n_elem: Number of sg entries
1114 * Executes libata internal command with timeout. @tf contains
1115 * command on entry and result on return. Timeout and error
1116 * conditions are reported via return value. No recovery action
1117 * is taken after a command times out. It's caller's duty to
1118 * clean up after timeout.
1121 * None. Should be called with kernel context, might sleep.
1124 * Zero on success, AC_ERR_* mask on failure
1126 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1127 struct ata_taskfile
*tf
, const u8
*cdb
,
1128 int dma_dir
, struct scatterlist
*sg
,
1129 unsigned int n_elem
)
1131 struct ata_port
*ap
= dev
->ap
;
1132 u8 command
= tf
->command
;
1133 struct ata_queued_cmd
*qc
;
1134 unsigned int tag
, preempted_tag
;
1135 u32 preempted_sactive
, preempted_qc_active
;
1136 DECLARE_COMPLETION_ONSTACK(wait
);
1137 unsigned long flags
;
1138 unsigned int err_mask
;
1141 spin_lock_irqsave(ap
->lock
, flags
);
1143 /* no internal command while frozen */
1144 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1145 spin_unlock_irqrestore(ap
->lock
, flags
);
1146 return AC_ERR_SYSTEM
;
1149 /* initialize internal qc */
1151 /* XXX: Tag 0 is used for drivers with legacy EH as some
1152 * drivers choke if any other tag is given. This breaks
1153 * ata_tag_internal() test for those drivers. Don't use new
1154 * EH stuff without converting to it.
1156 if (ap
->ops
->error_handler
)
1157 tag
= ATA_TAG_INTERNAL
;
1161 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1163 qc
= __ata_qc_from_tag(ap
, tag
);
1171 preempted_tag
= ap
->active_tag
;
1172 preempted_sactive
= ap
->sactive
;
1173 preempted_qc_active
= ap
->qc_active
;
1174 ap
->active_tag
= ATA_TAG_POISON
;
1178 /* prepare & issue qc */
1181 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1182 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1183 qc
->dma_dir
= dma_dir
;
1184 if (dma_dir
!= DMA_NONE
) {
1185 unsigned int i
, buflen
= 0;
1187 for (i
= 0; i
< n_elem
; i
++)
1188 buflen
+= sg
[i
].length
;
1190 ata_sg_init(qc
, sg
, n_elem
);
1191 qc
->nbytes
= buflen
;
1194 qc
->private_data
= &wait
;
1195 qc
->complete_fn
= ata_qc_complete_internal
;
1199 spin_unlock_irqrestore(ap
->lock
, flags
);
1201 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1203 ata_port_flush_task(ap
);
1206 spin_lock_irqsave(ap
->lock
, flags
);
1208 /* We're racing with irq here. If we lose, the
1209 * following test prevents us from completing the qc
1210 * twice. If we win, the port is frozen and will be
1211 * cleaned up by ->post_internal_cmd().
1213 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1214 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1216 if (ap
->ops
->error_handler
)
1217 ata_port_freeze(ap
);
1219 ata_qc_complete(qc
);
1221 if (ata_msg_warn(ap
))
1222 ata_dev_printk(dev
, KERN_WARNING
,
1223 "qc timeout (cmd 0x%x)\n", command
);
1226 spin_unlock_irqrestore(ap
->lock
, flags
);
1229 /* do post_internal_cmd */
1230 if (ap
->ops
->post_internal_cmd
)
1231 ap
->ops
->post_internal_cmd(qc
);
1233 if ((qc
->flags
& ATA_QCFLAG_FAILED
) && !qc
->err_mask
) {
1234 if (ata_msg_warn(ap
))
1235 ata_dev_printk(dev
, KERN_WARNING
,
1236 "zero err_mask for failed "
1237 "internal command, assuming AC_ERR_OTHER\n");
1238 qc
->err_mask
|= AC_ERR_OTHER
;
1242 spin_lock_irqsave(ap
->lock
, flags
);
1244 *tf
= qc
->result_tf
;
1245 err_mask
= qc
->err_mask
;
1248 ap
->active_tag
= preempted_tag
;
1249 ap
->sactive
= preempted_sactive
;
1250 ap
->qc_active
= preempted_qc_active
;
1252 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1253 * Until those drivers are fixed, we detect the condition
1254 * here, fail the command with AC_ERR_SYSTEM and reenable the
1257 * Note that this doesn't change any behavior as internal
1258 * command failure results in disabling the device in the
1259 * higher layer for LLDDs without new reset/EH callbacks.
1261 * Kill the following code as soon as those drivers are fixed.
1263 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1264 err_mask
|= AC_ERR_SYSTEM
;
1268 spin_unlock_irqrestore(ap
->lock
, flags
);
1274 * ata_exec_internal - execute libata internal command
1275 * @dev: Device to which the command is sent
1276 * @tf: Taskfile registers for the command and the result
1277 * @cdb: CDB for packet command
1278 * @dma_dir: Data tranfer direction of the command
1279 * @buf: Data buffer of the command
1280 * @buflen: Length of data buffer
1282 * Wrapper around ata_exec_internal_sg() which takes simple
1283 * buffer instead of sg list.
1286 * None. Should be called with kernel context, might sleep.
1289 * Zero on success, AC_ERR_* mask on failure
1291 unsigned ata_exec_internal(struct ata_device
*dev
,
1292 struct ata_taskfile
*tf
, const u8
*cdb
,
1293 int dma_dir
, void *buf
, unsigned int buflen
)
1295 struct scatterlist
*psg
= NULL
, sg
;
1296 unsigned int n_elem
= 0;
1298 if (dma_dir
!= DMA_NONE
) {
1300 sg_init_one(&sg
, buf
, buflen
);
1305 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1309 * ata_do_simple_cmd - execute simple internal command
1310 * @dev: Device to which the command is sent
1311 * @cmd: Opcode to execute
1313 * Execute a 'simple' command, that only consists of the opcode
1314 * 'cmd' itself, without filling any other registers
1317 * Kernel thread context (may sleep).
1320 * Zero on success, AC_ERR_* mask on failure
1322 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1324 struct ata_taskfile tf
;
1326 ata_tf_init(dev
, &tf
);
1329 tf
.flags
|= ATA_TFLAG_DEVICE
;
1330 tf
.protocol
= ATA_PROT_NODATA
;
1332 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1336 * ata_pio_need_iordy - check if iordy needed
1339 * Check if the current speed of the device requires IORDY. Used
1340 * by various controllers for chip configuration.
1343 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1346 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1353 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1355 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1356 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1357 /* Is the speed faster than the drive allows non IORDY ? */
1359 /* This is cycle times not frequency - watch the logic! */
1360 if (pio
> 240) /* PIO2 is 240nS per cycle */
1369 * ata_dev_read_id - Read ID data from the specified device
1370 * @dev: target device
1371 * @p_class: pointer to class of the target device (may be changed)
1372 * @flags: ATA_READID_* flags
1373 * @id: buffer to read IDENTIFY data into
1375 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1376 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1377 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1378 * for pre-ATA4 drives.
1381 * Kernel thread context (may sleep)
1384 * 0 on success, -errno otherwise.
1386 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1387 unsigned int flags
, u16
*id
)
1389 struct ata_port
*ap
= dev
->ap
;
1390 unsigned int class = *p_class
;
1391 struct ata_taskfile tf
;
1392 unsigned int err_mask
= 0;
1396 if (ata_msg_ctl(ap
))
1397 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER, host %u, dev %u\n",
1398 __FUNCTION__
, ap
->id
, dev
->devno
);
1400 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1403 ata_tf_init(dev
, &tf
);
1407 tf
.command
= ATA_CMD_ID_ATA
;
1410 tf
.command
= ATA_CMD_ID_ATAPI
;
1414 reason
= "unsupported class";
1418 tf
.protocol
= ATA_PROT_PIO
;
1420 /* Some devices choke if TF registers contain garbage. Make
1421 * sure those are properly initialized.
1423 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1425 /* Device presence detection is unreliable on some
1426 * controllers. Always poll IDENTIFY if available.
1428 tf
.flags
|= ATA_TFLAG_POLLING
;
1430 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1431 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1433 if (err_mask
& AC_ERR_NODEV_HINT
) {
1434 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1435 ap
->id
, dev
->devno
);
1440 reason
= "I/O error";
1444 swap_buf_le16(id
, ATA_ID_WORDS
);
1448 reason
= "device reports illegal type";
1450 if (class == ATA_DEV_ATA
) {
1451 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1454 if (ata_id_is_ata(id
))
1458 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1460 * The exact sequence expected by certain pre-ATA4 drives is:
1463 * INITIALIZE DEVICE PARAMETERS
1465 * Some drives were very specific about that exact sequence.
1467 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1468 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1471 reason
= "INIT_DEV_PARAMS failed";
1475 /* current CHS translation info (id[53-58]) might be
1476 * changed. reread the identify device info.
1478 flags
&= ~ATA_READID_POSTRESET
;
1488 if (ata_msg_warn(ap
))
1489 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1490 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1494 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1496 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1499 static void ata_dev_config_ncq(struct ata_device
*dev
,
1500 char *desc
, size_t desc_sz
)
1502 struct ata_port
*ap
= dev
->ap
;
1503 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1505 if (!ata_id_has_ncq(dev
->id
)) {
1509 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1510 snprintf(desc
, desc_sz
, "NCQ (not used)");
1513 if (ap
->flags
& ATA_FLAG_NCQ
) {
1514 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1515 dev
->flags
|= ATA_DFLAG_NCQ
;
1518 if (hdepth
>= ddepth
)
1519 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1521 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1524 static void ata_set_port_max_cmd_len(struct ata_port
*ap
)
1528 if (ap
->scsi_host
) {
1529 unsigned int len
= 0;
1531 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1532 len
= max(len
, ap
->device
[i
].cdb_len
);
1534 ap
->scsi_host
->max_cmd_len
= len
;
1539 * ata_dev_configure - Configure the specified ATA/ATAPI device
1540 * @dev: Target device to configure
1542 * Configure @dev according to @dev->id. Generic and low-level
1543 * driver specific fixups are also applied.
1546 * Kernel thread context (may sleep)
1549 * 0 on success, -errno otherwise
1551 int ata_dev_configure(struct ata_device
*dev
)
1553 struct ata_port
*ap
= dev
->ap
;
1554 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1555 const u16
*id
= dev
->id
;
1556 unsigned int xfer_mask
;
1557 char revbuf
[7]; /* XYZ-99\0 */
1558 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1559 char modelbuf
[ATA_ID_PROD_LEN
+1];
1562 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1563 ata_dev_printk(dev
, KERN_INFO
,
1564 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1565 __FUNCTION__
, ap
->id
, dev
->devno
);
1569 if (ata_msg_probe(ap
))
1570 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER, host %u, dev %u\n",
1571 __FUNCTION__
, ap
->id
, dev
->devno
);
1574 rc
= ata_acpi_push_id(ap
, dev
->devno
);
1576 ata_dev_printk(dev
, KERN_WARNING
, "failed to set _SDD(%d)\n",
1580 /* retrieve and execute the ATA task file of _GTF */
1581 ata_acpi_exec_tfs(ap
);
1583 /* print device capabilities */
1584 if (ata_msg_probe(ap
))
1585 ata_dev_printk(dev
, KERN_DEBUG
,
1586 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1587 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1589 id
[49], id
[82], id
[83], id
[84],
1590 id
[85], id
[86], id
[87], id
[88]);
1592 /* initialize to-be-configured parameters */
1593 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1594 dev
->max_sectors
= 0;
1602 * common ATA, ATAPI feature tests
1605 /* find max transfer mode; for printk only */
1606 xfer_mask
= ata_id_xfermask(id
);
1608 if (ata_msg_probe(ap
))
1611 /* ATA-specific feature tests */
1612 if (dev
->class == ATA_DEV_ATA
) {
1613 if (ata_id_is_cfa(id
)) {
1614 if (id
[162] & 1) /* CPRM may make this media unusable */
1615 ata_dev_printk(dev
, KERN_WARNING
, "ata%u: device %u supports DRM functions and may not be fully accessable.\n",
1616 ap
->id
, dev
->devno
);
1617 snprintf(revbuf
, 7, "CFA");
1620 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1622 dev
->n_sectors
= ata_id_n_sectors(id
);
1624 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1625 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1628 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1631 if (dev
->id
[59] & 0x100)
1632 dev
->multi_count
= dev
->id
[59] & 0xff;
1634 if (ata_id_has_lba(id
)) {
1635 const char *lba_desc
;
1639 dev
->flags
|= ATA_DFLAG_LBA
;
1640 if (ata_id_has_lba48(id
)) {
1641 dev
->flags
|= ATA_DFLAG_LBA48
;
1644 if (dev
->n_sectors
>= (1UL << 28) &&
1645 ata_id_has_flush_ext(id
))
1646 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1650 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1652 /* print device info to dmesg */
1653 if (ata_msg_drv(ap
) && print_info
) {
1654 ata_dev_printk(dev
, KERN_INFO
,
1655 "%s: %s, %s, max %s\n",
1656 revbuf
, modelbuf
, fwrevbuf
,
1657 ata_mode_string(xfer_mask
));
1658 ata_dev_printk(dev
, KERN_INFO
,
1659 "%Lu sectors, multi %u: %s %s\n",
1660 (unsigned long long)dev
->n_sectors
,
1661 dev
->multi_count
, lba_desc
, ncq_desc
);
1666 /* Default translation */
1667 dev
->cylinders
= id
[1];
1669 dev
->sectors
= id
[6];
1671 if (ata_id_current_chs_valid(id
)) {
1672 /* Current CHS translation is valid. */
1673 dev
->cylinders
= id
[54];
1674 dev
->heads
= id
[55];
1675 dev
->sectors
= id
[56];
1678 /* print device info to dmesg */
1679 if (ata_msg_drv(ap
) && print_info
) {
1680 ata_dev_printk(dev
, KERN_INFO
,
1681 "%s: %s, %s, max %s\n",
1682 revbuf
, modelbuf
, fwrevbuf
,
1683 ata_mode_string(xfer_mask
));
1684 ata_dev_printk(dev
, KERN_INFO
,
1685 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1686 (unsigned long long)dev
->n_sectors
,
1687 dev
->multi_count
, dev
->cylinders
,
1688 dev
->heads
, dev
->sectors
);
1695 /* ATAPI-specific feature tests */
1696 else if (dev
->class == ATA_DEV_ATAPI
) {
1697 char *cdb_intr_string
= "";
1699 rc
= atapi_cdb_len(id
);
1700 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1701 if (ata_msg_warn(ap
))
1702 ata_dev_printk(dev
, KERN_WARNING
,
1703 "unsupported CDB len\n");
1707 dev
->cdb_len
= (unsigned int) rc
;
1709 if (ata_id_cdb_intr(dev
->id
)) {
1710 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1711 cdb_intr_string
= ", CDB intr";
1714 /* print device info to dmesg */
1715 if (ata_msg_drv(ap
) && print_info
)
1716 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1717 ata_mode_string(xfer_mask
),
1721 /* determine max_sectors */
1722 dev
->max_sectors
= ATA_MAX_SECTORS
;
1723 if (dev
->flags
& ATA_DFLAG_LBA48
)
1724 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1726 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1727 /* Let the user know. We don't want to disallow opens for
1728 rescue purposes, or in case the vendor is just a blithering
1731 ata_dev_printk(dev
, KERN_WARNING
,
1732 "Drive reports diagnostics failure. This may indicate a drive\n");
1733 ata_dev_printk(dev
, KERN_WARNING
,
1734 "fault or invalid emulation. Contact drive vendor for information.\n");
1738 ata_set_port_max_cmd_len(ap
);
1740 /* limit bridge transfers to udma5, 200 sectors */
1741 if (ata_dev_knobble(dev
)) {
1742 if (ata_msg_drv(ap
) && print_info
)
1743 ata_dev_printk(dev
, KERN_INFO
,
1744 "applying bridge limits\n");
1745 dev
->udma_mask
&= ATA_UDMA5
;
1746 dev
->max_sectors
= ATA_MAX_SECTORS
;
1749 if (ap
->ops
->dev_config
)
1750 ap
->ops
->dev_config(ap
, dev
);
1752 if (ata_msg_probe(ap
))
1753 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
1754 __FUNCTION__
, ata_chk_status(ap
));
1758 if (ata_msg_probe(ap
))
1759 ata_dev_printk(dev
, KERN_DEBUG
,
1760 "%s: EXIT, err\n", __FUNCTION__
);
1765 * ata_bus_probe - Reset and probe ATA bus
1768 * Master ATA bus probing function. Initiates a hardware-dependent
1769 * bus reset, then attempts to identify any devices found on
1773 * PCI/etc. bus probe sem.
1776 * Zero on success, negative errno otherwise.
1779 int ata_bus_probe(struct ata_port
*ap
)
1781 unsigned int classes
[ATA_MAX_DEVICES
];
1782 int tries
[ATA_MAX_DEVICES
];
1784 struct ata_device
*dev
;
1788 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1789 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1792 /* reset and determine device classes */
1793 ap
->ops
->phy_reset(ap
);
1795 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1796 dev
= &ap
->device
[i
];
1798 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
1799 dev
->class != ATA_DEV_UNKNOWN
)
1800 classes
[dev
->devno
] = dev
->class;
1802 classes
[dev
->devno
] = ATA_DEV_NONE
;
1804 dev
->class = ATA_DEV_UNKNOWN
;
1809 /* after the reset the device state is PIO 0 and the controller
1810 state is undefined. Record the mode */
1812 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1813 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
1815 /* read IDENTIFY page and configure devices */
1816 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1817 dev
= &ap
->device
[i
];
1820 dev
->class = classes
[i
];
1822 if (!ata_dev_enabled(dev
))
1825 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
1830 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
1831 rc
= ata_dev_configure(dev
);
1832 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
1837 /* configure transfer mode */
1838 rc
= ata_set_mode(ap
, &dev
);
1842 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1843 if (ata_dev_enabled(&ap
->device
[i
]))
1846 /* no device present, disable port */
1847 ata_port_disable(ap
);
1848 ap
->ops
->port_disable(ap
);
1852 tries
[dev
->devno
]--;
1856 /* eeek, something went very wrong, give up */
1857 tries
[dev
->devno
] = 0;
1861 /* give it just one more chance */
1862 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
1864 if (tries
[dev
->devno
] == 1) {
1865 /* This is the last chance, better to slow
1866 * down than lose it.
1868 sata_down_spd_limit(ap
);
1869 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
1873 if (!tries
[dev
->devno
])
1874 ata_dev_disable(dev
);
1880 * ata_port_probe - Mark port as enabled
1881 * @ap: Port for which we indicate enablement
1883 * Modify @ap data structure such that the system
1884 * thinks that the entire port is enabled.
1886 * LOCKING: host lock, or some other form of
1890 void ata_port_probe(struct ata_port
*ap
)
1892 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1896 * sata_print_link_status - Print SATA link status
1897 * @ap: SATA port to printk link status about
1899 * This function prints link speed and status of a SATA link.
1904 static void sata_print_link_status(struct ata_port
*ap
)
1906 u32 sstatus
, scontrol
, tmp
;
1908 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1910 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1912 if (ata_port_online(ap
)) {
1913 tmp
= (sstatus
>> 4) & 0xf;
1914 ata_port_printk(ap
, KERN_INFO
,
1915 "SATA link up %s (SStatus %X SControl %X)\n",
1916 sata_spd_string(tmp
), sstatus
, scontrol
);
1918 ata_port_printk(ap
, KERN_INFO
,
1919 "SATA link down (SStatus %X SControl %X)\n",
1925 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1926 * @ap: SATA port associated with target SATA PHY.
1928 * This function issues commands to standard SATA Sxxx
1929 * PHY registers, to wake up the phy (and device), and
1930 * clear any reset condition.
1933 * PCI/etc. bus probe sem.
1936 void __sata_phy_reset(struct ata_port
*ap
)
1939 unsigned long timeout
= jiffies
+ (HZ
* 5);
1941 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1942 /* issue phy wake/reset */
1943 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1944 /* Couldn't find anything in SATA I/II specs, but
1945 * AHCI-1.1 10.4.2 says at least 1 ms. */
1948 /* phy wake/clear reset */
1949 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1951 /* wait for phy to become ready, if necessary */
1954 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1955 if ((sstatus
& 0xf) != 1)
1957 } while (time_before(jiffies
, timeout
));
1959 /* print link status */
1960 sata_print_link_status(ap
);
1962 /* TODO: phy layer with polling, timeouts, etc. */
1963 if (!ata_port_offline(ap
))
1966 ata_port_disable(ap
);
1968 if (ap
->flags
& ATA_FLAG_DISABLED
)
1971 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1972 ata_port_disable(ap
);
1976 ap
->cbl
= ATA_CBL_SATA
;
1980 * sata_phy_reset - Reset SATA bus.
1981 * @ap: SATA port associated with target SATA PHY.
1983 * This function resets the SATA bus, and then probes
1984 * the bus for devices.
1987 * PCI/etc. bus probe sem.
1990 void sata_phy_reset(struct ata_port
*ap
)
1992 __sata_phy_reset(ap
);
1993 if (ap
->flags
& ATA_FLAG_DISABLED
)
1999 * ata_dev_pair - return other device on cable
2002 * Obtain the other device on the same cable, or if none is
2003 * present NULL is returned
2006 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2008 struct ata_port
*ap
= adev
->ap
;
2009 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2010 if (!ata_dev_enabled(pair
))
2016 * ata_port_disable - Disable port.
2017 * @ap: Port to be disabled.
2019 * Modify @ap data structure such that the system
2020 * thinks that the entire port is disabled, and should
2021 * never attempt to probe or communicate with devices
2024 * LOCKING: host lock, or some other form of
2028 void ata_port_disable(struct ata_port
*ap
)
2030 ap
->device
[0].class = ATA_DEV_NONE
;
2031 ap
->device
[1].class = ATA_DEV_NONE
;
2032 ap
->flags
|= ATA_FLAG_DISABLED
;
2036 * sata_down_spd_limit - adjust SATA spd limit downward
2037 * @ap: Port to adjust SATA spd limit for
2039 * Adjust SATA spd limit of @ap downward. Note that this
2040 * function only adjusts the limit. The change must be applied
2041 * using sata_set_spd().
2044 * Inherited from caller.
2047 * 0 on success, negative errno on failure
2049 int sata_down_spd_limit(struct ata_port
*ap
)
2051 u32 sstatus
, spd
, mask
;
2054 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2058 mask
= ap
->sata_spd_limit
;
2061 highbit
= fls(mask
) - 1;
2062 mask
&= ~(1 << highbit
);
2064 spd
= (sstatus
>> 4) & 0xf;
2068 mask
&= (1 << spd
) - 1;
2072 ap
->sata_spd_limit
= mask
;
2074 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2075 sata_spd_string(fls(mask
)));
2080 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2084 if (ap
->sata_spd_limit
== UINT_MAX
)
2087 limit
= fls(ap
->sata_spd_limit
);
2089 spd
= (*scontrol
>> 4) & 0xf;
2090 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2092 return spd
!= limit
;
2096 * sata_set_spd_needed - is SATA spd configuration needed
2097 * @ap: Port in question
2099 * Test whether the spd limit in SControl matches
2100 * @ap->sata_spd_limit. This function is used to determine
2101 * whether hardreset is necessary to apply SATA spd
2105 * Inherited from caller.
2108 * 1 if SATA spd configuration is needed, 0 otherwise.
2110 int sata_set_spd_needed(struct ata_port
*ap
)
2114 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2117 return __sata_set_spd_needed(ap
, &scontrol
);
2121 * sata_set_spd - set SATA spd according to spd limit
2122 * @ap: Port to set SATA spd for
2124 * Set SATA spd of @ap according to sata_spd_limit.
2127 * Inherited from caller.
2130 * 0 if spd doesn't need to be changed, 1 if spd has been
2131 * changed. Negative errno if SCR registers are inaccessible.
2133 int sata_set_spd(struct ata_port
*ap
)
2138 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2141 if (!__sata_set_spd_needed(ap
, &scontrol
))
2144 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2151 * This mode timing computation functionality is ported over from
2152 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2155 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2156 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2157 * for UDMA6, which is currently supported only by Maxtor drives.
2159 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2162 static const struct ata_timing ata_timing
[] = {
2164 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2165 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2166 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2167 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2169 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2170 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2171 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2172 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2173 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2175 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2177 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2178 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2179 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2181 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2182 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2183 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2185 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2186 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2187 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2188 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2190 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2191 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2192 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2194 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2199 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2200 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2202 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2204 q
->setup
= EZ(t
->setup
* 1000, T
);
2205 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2206 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2207 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2208 q
->active
= EZ(t
->active
* 1000, T
);
2209 q
->recover
= EZ(t
->recover
* 1000, T
);
2210 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2211 q
->udma
= EZ(t
->udma
* 1000, UT
);
2214 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2215 struct ata_timing
*m
, unsigned int what
)
2217 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2218 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2219 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2220 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2221 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2222 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2223 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2224 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2227 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2229 const struct ata_timing
*t
;
2231 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2232 if (t
->mode
== 0xFF)
2237 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2238 struct ata_timing
*t
, int T
, int UT
)
2240 const struct ata_timing
*s
;
2241 struct ata_timing p
;
2247 if (!(s
= ata_timing_find_mode(speed
)))
2250 memcpy(t
, s
, sizeof(*s
));
2253 * If the drive is an EIDE drive, it can tell us it needs extended
2254 * PIO/MW_DMA cycle timing.
2257 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2258 memset(&p
, 0, sizeof(p
));
2259 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2260 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2261 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2262 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2263 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2265 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2269 * Convert the timing to bus clock counts.
2272 ata_timing_quantize(t
, t
, T
, UT
);
2275 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2276 * S.M.A.R.T * and some other commands. We have to ensure that the
2277 * DMA cycle timing is slower/equal than the fastest PIO timing.
2280 if (speed
> XFER_PIO_6
) {
2281 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2282 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2286 * Lengthen active & recovery time so that cycle time is correct.
2289 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2290 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2291 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2294 if (t
->active
+ t
->recover
< t
->cycle
) {
2295 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2296 t
->recover
= t
->cycle
- t
->active
;
2303 * ata_down_xfermask_limit - adjust dev xfer masks downward
2304 * @dev: Device to adjust xfer masks
2305 * @sel: ATA_DNXFER_* selector
2307 * Adjust xfer masks of @dev downward. Note that this function
2308 * does not apply the change. Invoking ata_set_mode() afterwards
2309 * will apply the limit.
2312 * Inherited from caller.
2315 * 0 on success, negative errno on failure
2317 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2320 unsigned int orig_mask
, xfer_mask
;
2321 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2324 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2325 sel
&= ~ATA_DNXFER_QUIET
;
2327 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2330 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2333 case ATA_DNXFER_PIO
:
2334 highbit
= fls(pio_mask
) - 1;
2335 pio_mask
&= ~(1 << highbit
);
2338 case ATA_DNXFER_DMA
:
2340 highbit
= fls(udma_mask
) - 1;
2341 udma_mask
&= ~(1 << highbit
);
2344 } else if (mwdma_mask
) {
2345 highbit
= fls(mwdma_mask
) - 1;
2346 mwdma_mask
&= ~(1 << highbit
);
2352 case ATA_DNXFER_40C
:
2353 udma_mask
&= ATA_UDMA_MASK_40C
;
2356 case ATA_DNXFER_FORCE_PIO0
:
2358 case ATA_DNXFER_FORCE_PIO
:
2367 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2369 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2373 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2374 snprintf(buf
, sizeof(buf
), "%s:%s",
2375 ata_mode_string(xfer_mask
),
2376 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2378 snprintf(buf
, sizeof(buf
), "%s",
2379 ata_mode_string(xfer_mask
));
2381 ata_dev_printk(dev
, KERN_WARNING
,
2382 "limiting speed to %s\n", buf
);
2385 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2391 static int ata_dev_set_mode(struct ata_device
*dev
)
2393 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2394 unsigned int err_mask
;
2397 dev
->flags
&= ~ATA_DFLAG_PIO
;
2398 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2399 dev
->flags
|= ATA_DFLAG_PIO
;
2401 err_mask
= ata_dev_set_xfermode(dev
);
2402 /* Old CFA may refuse this command, which is just fine */
2403 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2404 err_mask
&= ~AC_ERR_DEV
;
2407 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2408 "(err_mask=0x%x)\n", err_mask
);
2412 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2413 rc
= ata_dev_revalidate(dev
, 0);
2414 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2418 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2419 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2421 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2422 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2427 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2428 * @ap: port on which timings will be programmed
2429 * @r_failed_dev: out paramter for failed device
2431 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2432 * ata_set_mode() fails, pointer to the failing device is
2433 * returned in @r_failed_dev.
2436 * PCI/etc. bus probe sem.
2439 * 0 on success, negative errno otherwise
2441 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2443 struct ata_device
*dev
;
2444 int i
, rc
= 0, used_dma
= 0, found
= 0;
2446 /* has private set_mode? */
2447 if (ap
->ops
->set_mode
)
2448 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2450 /* step 1: calculate xfer_mask */
2451 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2452 unsigned int pio_mask
, dma_mask
;
2454 dev
= &ap
->device
[i
];
2456 if (!ata_dev_enabled(dev
))
2459 ata_dev_xfermask(dev
);
2461 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2462 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2463 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2464 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2473 /* step 2: always set host PIO timings */
2474 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2475 dev
= &ap
->device
[i
];
2476 if (!ata_dev_enabled(dev
))
2479 if (!dev
->pio_mode
) {
2480 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2485 dev
->xfer_mode
= dev
->pio_mode
;
2486 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2487 if (ap
->ops
->set_piomode
)
2488 ap
->ops
->set_piomode(ap
, dev
);
2491 /* step 3: set host DMA timings */
2492 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2493 dev
= &ap
->device
[i
];
2495 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2498 dev
->xfer_mode
= dev
->dma_mode
;
2499 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2500 if (ap
->ops
->set_dmamode
)
2501 ap
->ops
->set_dmamode(ap
, dev
);
2504 /* step 4: update devices' xfer mode */
2505 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2506 dev
= &ap
->device
[i
];
2508 /* don't update suspended devices' xfer mode */
2509 if (!ata_dev_ready(dev
))
2512 rc
= ata_dev_set_mode(dev
);
2517 /* Record simplex status. If we selected DMA then the other
2518 * host channels are not permitted to do so.
2520 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2521 ap
->host
->simplex_claimed
= 1;
2523 /* step5: chip specific finalisation */
2524 if (ap
->ops
->post_set_mode
)
2525 ap
->ops
->post_set_mode(ap
);
2529 *r_failed_dev
= dev
;
2534 * ata_tf_to_host - issue ATA taskfile to host controller
2535 * @ap: port to which command is being issued
2536 * @tf: ATA taskfile register set
2538 * Issues ATA taskfile register set to ATA host controller,
2539 * with proper synchronization with interrupt handler and
2543 * spin_lock_irqsave(host lock)
2546 static inline void ata_tf_to_host(struct ata_port
*ap
,
2547 const struct ata_taskfile
*tf
)
2549 ap
->ops
->tf_load(ap
, tf
);
2550 ap
->ops
->exec_command(ap
, tf
);
2554 * ata_busy_sleep - sleep until BSY clears, or timeout
2555 * @ap: port containing status register to be polled
2556 * @tmout_pat: impatience timeout
2557 * @tmout: overall timeout
2559 * Sleep until ATA Status register bit BSY clears,
2560 * or a timeout occurs.
2563 * Kernel thread context (may sleep).
2566 * 0 on success, -errno otherwise.
2568 int ata_busy_sleep(struct ata_port
*ap
,
2569 unsigned long tmout_pat
, unsigned long tmout
)
2571 unsigned long timer_start
, timeout
;
2574 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2575 timer_start
= jiffies
;
2576 timeout
= timer_start
+ tmout_pat
;
2577 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2578 time_before(jiffies
, timeout
)) {
2580 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2583 if (status
!= 0xff && (status
& ATA_BUSY
))
2584 ata_port_printk(ap
, KERN_WARNING
,
2585 "port is slow to respond, please be patient "
2586 "(Status 0x%x)\n", status
);
2588 timeout
= timer_start
+ tmout
;
2589 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2590 time_before(jiffies
, timeout
)) {
2592 status
= ata_chk_status(ap
);
2598 if (status
& ATA_BUSY
) {
2599 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2600 "(%lu secs, Status 0x%x)\n",
2601 tmout
/ HZ
, status
);
2608 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2610 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2611 unsigned int dev0
= devmask
& (1 << 0);
2612 unsigned int dev1
= devmask
& (1 << 1);
2613 unsigned long timeout
;
2615 /* if device 0 was found in ata_devchk, wait for its
2619 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2621 /* if device 1 was found in ata_devchk, wait for
2622 * register access, then wait for BSY to clear
2624 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2628 ap
->ops
->dev_select(ap
, 1);
2629 nsect
= ioread8(ioaddr
->nsect_addr
);
2630 lbal
= ioread8(ioaddr
->lbal_addr
);
2631 if ((nsect
== 1) && (lbal
== 1))
2633 if (time_after(jiffies
, timeout
)) {
2637 msleep(50); /* give drive a breather */
2640 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2642 /* is all this really necessary? */
2643 ap
->ops
->dev_select(ap
, 0);
2645 ap
->ops
->dev_select(ap
, 1);
2647 ap
->ops
->dev_select(ap
, 0);
2650 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2651 unsigned int devmask
)
2653 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2655 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2657 /* software reset. causes dev0 to be selected */
2658 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2659 udelay(20); /* FIXME: flush */
2660 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2661 udelay(20); /* FIXME: flush */
2662 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2664 /* spec mandates ">= 2ms" before checking status.
2665 * We wait 150ms, because that was the magic delay used for
2666 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2667 * between when the ATA command register is written, and then
2668 * status is checked. Because waiting for "a while" before
2669 * checking status is fine, post SRST, we perform this magic
2670 * delay here as well.
2672 * Old drivers/ide uses the 2mS rule and then waits for ready
2676 /* Before we perform post reset processing we want to see if
2677 * the bus shows 0xFF because the odd clown forgets the D7
2678 * pulldown resistor.
2680 if (ata_check_status(ap
) == 0xFF)
2683 ata_bus_post_reset(ap
, devmask
);
2689 * ata_bus_reset - reset host port and associated ATA channel
2690 * @ap: port to reset
2692 * This is typically the first time we actually start issuing
2693 * commands to the ATA channel. We wait for BSY to clear, then
2694 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2695 * result. Determine what devices, if any, are on the channel
2696 * by looking at the device 0/1 error register. Look at the signature
2697 * stored in each device's taskfile registers, to determine if
2698 * the device is ATA or ATAPI.
2701 * PCI/etc. bus probe sem.
2702 * Obtains host lock.
2705 * Sets ATA_FLAG_DISABLED if bus reset fails.
2708 void ata_bus_reset(struct ata_port
*ap
)
2710 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2711 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2713 unsigned int dev0
, dev1
= 0, devmask
= 0;
2715 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2717 /* determine if device 0/1 are present */
2718 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2721 dev0
= ata_devchk(ap
, 0);
2723 dev1
= ata_devchk(ap
, 1);
2727 devmask
|= (1 << 0);
2729 devmask
|= (1 << 1);
2731 /* select device 0 again */
2732 ap
->ops
->dev_select(ap
, 0);
2734 /* issue bus reset */
2735 if (ap
->flags
& ATA_FLAG_SRST
)
2736 if (ata_bus_softreset(ap
, devmask
))
2740 * determine by signature whether we have ATA or ATAPI devices
2742 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2743 if ((slave_possible
) && (err
!= 0x81))
2744 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2746 /* re-enable interrupts */
2747 ap
->ops
->irq_on(ap
);
2749 /* is double-select really necessary? */
2750 if (ap
->device
[1].class != ATA_DEV_NONE
)
2751 ap
->ops
->dev_select(ap
, 1);
2752 if (ap
->device
[0].class != ATA_DEV_NONE
)
2753 ap
->ops
->dev_select(ap
, 0);
2755 /* if no devices were detected, disable this port */
2756 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2757 (ap
->device
[1].class == ATA_DEV_NONE
))
2760 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2761 /* set up device control for ATA_FLAG_SATA_RESET */
2762 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2769 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2770 ap
->ops
->port_disable(ap
);
2776 * sata_phy_debounce - debounce SATA phy status
2777 * @ap: ATA port to debounce SATA phy status for
2778 * @params: timing parameters { interval, duratinon, timeout } in msec
2780 * Make sure SStatus of @ap reaches stable state, determined by
2781 * holding the same value where DET is not 1 for @duration polled
2782 * every @interval, before @timeout. Timeout constraints the
2783 * beginning of the stable state. Because, after hot unplugging,
2784 * DET gets stuck at 1 on some controllers, this functions waits
2785 * until timeout then returns 0 if DET is stable at 1.
2788 * Kernel thread context (may sleep)
2791 * 0 on success, -errno on failure.
2793 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
2795 unsigned long interval_msec
= params
[0];
2796 unsigned long duration
= params
[1] * HZ
/ 1000;
2797 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
2798 unsigned long last_jiffies
;
2802 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2807 last_jiffies
= jiffies
;
2810 msleep(interval_msec
);
2811 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2817 if (cur
== 1 && time_before(jiffies
, timeout
))
2819 if (time_after(jiffies
, last_jiffies
+ duration
))
2824 /* unstable, start over */
2826 last_jiffies
= jiffies
;
2829 if (time_after(jiffies
, timeout
))
2835 * sata_phy_resume - resume SATA phy
2836 * @ap: ATA port to resume SATA phy for
2837 * @params: timing parameters { interval, duratinon, timeout } in msec
2839 * Resume SATA phy of @ap and debounce it.
2842 * Kernel thread context (may sleep)
2845 * 0 on success, -errno on failure.
2847 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
2852 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2855 scontrol
= (scontrol
& 0x0f0) | 0x300;
2857 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2860 /* Some PHYs react badly if SStatus is pounded immediately
2861 * after resuming. Delay 200ms before debouncing.
2865 return sata_phy_debounce(ap
, params
);
2868 static void ata_wait_spinup(struct ata_port
*ap
)
2870 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2871 unsigned long end
, secs
;
2874 /* first, debounce phy if SATA */
2875 if (ap
->cbl
== ATA_CBL_SATA
) {
2876 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
2878 /* if debounced successfully and offline, no need to wait */
2879 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
2883 /* okay, let's give the drive time to spin up */
2884 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
2885 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
2887 if (time_after(jiffies
, end
))
2891 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
2892 "(%lu secs)\n", secs
);
2894 schedule_timeout_uninterruptible(end
- jiffies
);
2898 * ata_std_prereset - prepare for reset
2899 * @ap: ATA port to be reset
2901 * @ap is about to be reset. Initialize it.
2904 * Kernel thread context (may sleep)
2907 * 0 on success, -errno otherwise.
2909 int ata_std_prereset(struct ata_port
*ap
)
2911 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2912 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
2915 /* handle link resume & hotplug spinup */
2916 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
2917 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
2918 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2920 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
2921 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
2922 ata_wait_spinup(ap
);
2924 /* if we're about to do hardreset, nothing more to do */
2925 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
2928 /* if SATA, resume phy */
2929 if (ap
->cbl
== ATA_CBL_SATA
) {
2930 rc
= sata_phy_resume(ap
, timing
);
2931 if (rc
&& rc
!= -EOPNOTSUPP
) {
2932 /* phy resume failed */
2933 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
2934 "link for reset (errno=%d)\n", rc
);
2939 /* Wait for !BSY if the controller can wait for the first D2H
2940 * Reg FIS and we don't know that no device is attached.
2942 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
2943 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2949 * ata_std_softreset - reset host port via ATA SRST
2950 * @ap: port to reset
2951 * @classes: resulting classes of attached devices
2953 * Reset host port using ATA SRST.
2956 * Kernel thread context (may sleep)
2959 * 0 on success, -errno otherwise.
2961 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2963 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2964 unsigned int devmask
= 0, err_mask
;
2969 if (ata_port_offline(ap
)) {
2970 classes
[0] = ATA_DEV_NONE
;
2974 /* determine if device 0/1 are present */
2975 if (ata_devchk(ap
, 0))
2976 devmask
|= (1 << 0);
2977 if (slave_possible
&& ata_devchk(ap
, 1))
2978 devmask
|= (1 << 1);
2980 /* select device 0 again */
2981 ap
->ops
->dev_select(ap
, 0);
2983 /* issue bus reset */
2984 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2985 err_mask
= ata_bus_softreset(ap
, devmask
);
2987 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
2992 /* determine by signature whether we have ATA or ATAPI devices */
2993 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2994 if (slave_possible
&& err
!= 0x81)
2995 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2998 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3003 * sata_port_hardreset - reset port via SATA phy reset
3004 * @ap: port to reset
3005 * @timing: timing parameters { interval, duratinon, timeout } in msec
3007 * SATA phy-reset host port using DET bits of SControl register.
3010 * Kernel thread context (may sleep)
3013 * 0 on success, -errno otherwise.
3015 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
3022 if (sata_set_spd_needed(ap
)) {
3023 /* SATA spec says nothing about how to reconfigure
3024 * spd. To be on the safe side, turn off phy during
3025 * reconfiguration. This works for at least ICH7 AHCI
3028 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3031 scontrol
= (scontrol
& 0x0f0) | 0x304;
3033 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3039 /* issue phy wake/reset */
3040 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3043 scontrol
= (scontrol
& 0x0f0) | 0x301;
3045 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3048 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3049 * 10.4.2 says at least 1 ms.
3053 /* bring phy back */
3054 rc
= sata_phy_resume(ap
, timing
);
3056 DPRINTK("EXIT, rc=%d\n", rc
);
3061 * sata_std_hardreset - reset host port via SATA phy reset
3062 * @ap: port to reset
3063 * @class: resulting class of attached device
3065 * SATA phy-reset host port using DET bits of SControl register,
3066 * wait for !BSY and classify the attached device.
3069 * Kernel thread context (may sleep)
3072 * 0 on success, -errno otherwise.
3074 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
3076 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3082 rc
= sata_port_hardreset(ap
, timing
);
3084 ata_port_printk(ap
, KERN_ERR
,
3085 "COMRESET failed (errno=%d)\n", rc
);
3089 /* TODO: phy layer with polling, timeouts, etc. */
3090 if (ata_port_offline(ap
)) {
3091 *class = ATA_DEV_NONE
;
3092 DPRINTK("EXIT, link offline\n");
3096 /* wait a while before checking status, see SRST for more info */
3099 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
3100 ata_port_printk(ap
, KERN_ERR
,
3101 "COMRESET failed (device not ready)\n");
3105 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3107 *class = ata_dev_try_classify(ap
, 0, NULL
);
3109 DPRINTK("EXIT, class=%u\n", *class);
3114 * ata_std_postreset - standard postreset callback
3115 * @ap: the target ata_port
3116 * @classes: classes of attached devices
3118 * This function is invoked after a successful reset. Note that
3119 * the device might have been reset more than once using
3120 * different reset methods before postreset is invoked.
3123 * Kernel thread context (may sleep)
3125 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3131 /* print link status */
3132 sata_print_link_status(ap
);
3135 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3136 sata_scr_write(ap
, SCR_ERROR
, serror
);
3138 /* re-enable interrupts */
3139 if (!ap
->ops
->error_handler
)
3140 ap
->ops
->irq_on(ap
);
3142 /* is double-select really necessary? */
3143 if (classes
[0] != ATA_DEV_NONE
)
3144 ap
->ops
->dev_select(ap
, 1);
3145 if (classes
[1] != ATA_DEV_NONE
)
3146 ap
->ops
->dev_select(ap
, 0);
3148 /* bail out if no device is present */
3149 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3150 DPRINTK("EXIT, no device\n");
3154 /* set up device control */
3155 if (ap
->ioaddr
.ctl_addr
)
3156 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3162 * ata_dev_same_device - Determine whether new ID matches configured device
3163 * @dev: device to compare against
3164 * @new_class: class of the new device
3165 * @new_id: IDENTIFY page of the new device
3167 * Compare @new_class and @new_id against @dev and determine
3168 * whether @dev is the device indicated by @new_class and
3175 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3177 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3180 const u16
*old_id
= dev
->id
;
3181 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3182 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3185 if (dev
->class != new_class
) {
3186 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3187 dev
->class, new_class
);
3191 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3192 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3193 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3194 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3195 new_n_sectors
= ata_id_n_sectors(new_id
);
3197 if (strcmp(model
[0], model
[1])) {
3198 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3199 "'%s' != '%s'\n", model
[0], model
[1]);
3203 if (strcmp(serial
[0], serial
[1])) {
3204 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3205 "'%s' != '%s'\n", serial
[0], serial
[1]);
3209 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3210 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3212 (unsigned long long)dev
->n_sectors
,
3213 (unsigned long long)new_n_sectors
);
3221 * ata_dev_revalidate - Revalidate ATA device
3222 * @dev: device to revalidate
3223 * @readid_flags: read ID flags
3225 * Re-read IDENTIFY page and make sure @dev is still attached to
3229 * Kernel thread context (may sleep)
3232 * 0 on success, negative errno otherwise
3234 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3236 unsigned int class = dev
->class;
3237 u16
*id
= (void *)dev
->ap
->sector_buf
;
3240 if (!ata_dev_enabled(dev
)) {
3246 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3250 /* is the device still there? */
3251 if (!ata_dev_same_device(dev
, class, id
)) {
3256 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3258 /* configure device according to the new ID */
3259 rc
= ata_dev_configure(dev
);
3264 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3268 struct ata_blacklist_entry
{
3269 const char *model_num
;
3270 const char *model_rev
;
3271 unsigned long horkage
;
3274 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3275 /* Devices with DMA related problems under Linux */
3276 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3277 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3278 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3279 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3280 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3281 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3282 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3283 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3284 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3285 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3286 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3287 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3288 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3289 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3290 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3291 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3292 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3293 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3294 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3295 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3296 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3297 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3298 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3299 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3300 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3301 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3302 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3303 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3304 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3305 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3307 /* Devices we expect to fail diagnostics */
3309 /* Devices where NCQ should be avoided */
3311 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3313 /* Devices with NCQ limits */
3319 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3321 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3322 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3323 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3325 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3326 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3328 while (ad
->model_num
) {
3329 if (!strcmp(ad
->model_num
, model_num
)) {
3330 if (ad
->model_rev
== NULL
)
3332 if (!strcmp(ad
->model_rev
, model_rev
))
3340 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3342 /* We don't support polling DMA.
3343 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3344 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3346 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3347 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3349 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3353 * ata_dev_xfermask - Compute supported xfermask of the given device
3354 * @dev: Device to compute xfermask for
3356 * Compute supported xfermask of @dev and store it in
3357 * dev->*_mask. This function is responsible for applying all
3358 * known limits including host controller limits, device
3364 static void ata_dev_xfermask(struct ata_device
*dev
)
3366 struct ata_port
*ap
= dev
->ap
;
3367 struct ata_host
*host
= ap
->host
;
3368 unsigned long xfer_mask
;
3370 /* controller modes available */
3371 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3372 ap
->mwdma_mask
, ap
->udma_mask
);
3374 /* Apply cable rule here. Don't apply it early because when
3375 * we handle hot plug the cable type can itself change.
3377 if (ap
->cbl
== ATA_CBL_PATA40
)
3378 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3379 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3380 * host side are checked drive side as well. Cases where we know a
3381 * 40wire cable is used safely for 80 are not checked here.
3383 if (ata_drive_40wire(dev
->id
) && (ap
->cbl
== ATA_CBL_PATA_UNK
|| ap
->cbl
== ATA_CBL_PATA80
))
3384 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3387 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3388 dev
->mwdma_mask
, dev
->udma_mask
);
3389 xfer_mask
&= ata_id_xfermask(dev
->id
);
3392 * CFA Advanced TrueIDE timings are not allowed on a shared
3395 if (ata_dev_pair(dev
)) {
3396 /* No PIO5 or PIO6 */
3397 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3398 /* No MWDMA3 or MWDMA 4 */
3399 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3402 if (ata_dma_blacklisted(dev
)) {
3403 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3404 ata_dev_printk(dev
, KERN_WARNING
,
3405 "device is on DMA blacklist, disabling DMA\n");
3408 if ((host
->flags
& ATA_HOST_SIMPLEX
) && host
->simplex_claimed
) {
3409 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3410 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3411 "other device, disabling DMA\n");
3414 if (ap
->ops
->mode_filter
)
3415 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3417 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3418 &dev
->mwdma_mask
, &dev
->udma_mask
);
3422 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3423 * @dev: Device to which command will be sent
3425 * Issue SET FEATURES - XFER MODE command to device @dev
3429 * PCI/etc. bus probe sem.
3432 * 0 on success, AC_ERR_* mask otherwise.
3435 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3437 struct ata_taskfile tf
;
3438 unsigned int err_mask
;
3440 /* set up set-features taskfile */
3441 DPRINTK("set features - xfer mode\n");
3443 ata_tf_init(dev
, &tf
);
3444 tf
.command
= ATA_CMD_SET_FEATURES
;
3445 tf
.feature
= SETFEATURES_XFER
;
3446 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3447 tf
.protocol
= ATA_PROT_NODATA
;
3448 tf
.nsect
= dev
->xfer_mode
;
3450 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3452 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3457 * ata_dev_init_params - Issue INIT DEV PARAMS command
3458 * @dev: Device to which command will be sent
3459 * @heads: Number of heads (taskfile parameter)
3460 * @sectors: Number of sectors (taskfile parameter)
3463 * Kernel thread context (may sleep)
3466 * 0 on success, AC_ERR_* mask otherwise.
3468 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3469 u16 heads
, u16 sectors
)
3471 struct ata_taskfile tf
;
3472 unsigned int err_mask
;
3474 /* Number of sectors per track 1-255. Number of heads 1-16 */
3475 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3476 return AC_ERR_INVALID
;
3478 /* set up init dev params taskfile */
3479 DPRINTK("init dev params \n");
3481 ata_tf_init(dev
, &tf
);
3482 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3483 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3484 tf
.protocol
= ATA_PROT_NODATA
;
3486 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3488 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3490 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3495 * ata_sg_clean - Unmap DMA memory associated with command
3496 * @qc: Command containing DMA memory to be released
3498 * Unmap all mapped DMA memory associated with this command.
3501 * spin_lock_irqsave(host lock)
3503 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3505 struct ata_port
*ap
= qc
->ap
;
3506 struct scatterlist
*sg
= qc
->__sg
;
3507 int dir
= qc
->dma_dir
;
3508 void *pad_buf
= NULL
;
3510 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3511 WARN_ON(sg
== NULL
);
3513 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3514 WARN_ON(qc
->n_elem
> 1);
3516 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3518 /* if we padded the buffer out to 32-bit bound, and data
3519 * xfer direction is from-device, we must copy from the
3520 * pad buffer back into the supplied buffer
3522 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3523 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3525 if (qc
->flags
& ATA_QCFLAG_SG
) {
3527 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3528 /* restore last sg */
3529 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3531 struct scatterlist
*psg
= &qc
->pad_sgent
;
3532 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3533 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3534 kunmap_atomic(addr
, KM_IRQ0
);
3538 dma_unmap_single(ap
->dev
,
3539 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3542 sg
->length
+= qc
->pad_len
;
3544 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3545 pad_buf
, qc
->pad_len
);
3548 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3553 * ata_fill_sg - Fill PCI IDE PRD table
3554 * @qc: Metadata associated with taskfile to be transferred
3556 * Fill PCI IDE PRD (scatter-gather) table with segments
3557 * associated with the current disk command.
3560 * spin_lock_irqsave(host lock)
3563 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3565 struct ata_port
*ap
= qc
->ap
;
3566 struct scatterlist
*sg
;
3569 WARN_ON(qc
->__sg
== NULL
);
3570 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3573 ata_for_each_sg(sg
, qc
) {
3577 /* determine if physical DMA addr spans 64K boundary.
3578 * Note h/w doesn't support 64-bit, so we unconditionally
3579 * truncate dma_addr_t to u32.
3581 addr
= (u32
) sg_dma_address(sg
);
3582 sg_len
= sg_dma_len(sg
);
3585 offset
= addr
& 0xffff;
3587 if ((offset
+ sg_len
) > 0x10000)
3588 len
= 0x10000 - offset
;
3590 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3591 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3592 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3601 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3604 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3605 * @qc: Metadata associated with taskfile to check
3607 * Allow low-level driver to filter ATA PACKET commands, returning
3608 * a status indicating whether or not it is OK to use DMA for the
3609 * supplied PACKET command.
3612 * spin_lock_irqsave(host lock)
3614 * RETURNS: 0 when ATAPI DMA can be used
3617 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3619 struct ata_port
*ap
= qc
->ap
;
3620 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3622 if (ap
->ops
->check_atapi_dma
)
3623 rc
= ap
->ops
->check_atapi_dma(qc
);
3628 * ata_qc_prep - Prepare taskfile for submission
3629 * @qc: Metadata associated with taskfile to be prepared
3631 * Prepare ATA taskfile for submission.
3634 * spin_lock_irqsave(host lock)
3636 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3638 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3644 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3647 * ata_sg_init_one - Associate command with memory buffer
3648 * @qc: Command to be associated
3649 * @buf: Memory buffer
3650 * @buflen: Length of memory buffer, in bytes.
3652 * Initialize the data-related elements of queued_cmd @qc
3653 * to point to a single memory buffer, @buf of byte length @buflen.
3656 * spin_lock_irqsave(host lock)
3659 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3661 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3663 qc
->__sg
= &qc
->sgent
;
3665 qc
->orig_n_elem
= 1;
3667 qc
->nbytes
= buflen
;
3669 sg_init_one(&qc
->sgent
, buf
, buflen
);
3673 * ata_sg_init - Associate command with scatter-gather table.
3674 * @qc: Command to be associated
3675 * @sg: Scatter-gather table.
3676 * @n_elem: Number of elements in s/g table.
3678 * Initialize the data-related elements of queued_cmd @qc
3679 * to point to a scatter-gather table @sg, containing @n_elem
3683 * spin_lock_irqsave(host lock)
3686 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3687 unsigned int n_elem
)
3689 qc
->flags
|= ATA_QCFLAG_SG
;
3691 qc
->n_elem
= n_elem
;
3692 qc
->orig_n_elem
= n_elem
;
3696 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3697 * @qc: Command with memory buffer to be mapped.
3699 * DMA-map the memory buffer associated with queued_cmd @qc.
3702 * spin_lock_irqsave(host lock)
3705 * Zero on success, negative on error.
3708 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3710 struct ata_port
*ap
= qc
->ap
;
3711 int dir
= qc
->dma_dir
;
3712 struct scatterlist
*sg
= qc
->__sg
;
3713 dma_addr_t dma_address
;
3716 /* we must lengthen transfers to end on a 32-bit boundary */
3717 qc
->pad_len
= sg
->length
& 3;
3719 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3720 struct scatterlist
*psg
= &qc
->pad_sgent
;
3722 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3724 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3726 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3727 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3730 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3731 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3733 sg
->length
-= qc
->pad_len
;
3734 if (sg
->length
== 0)
3737 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3738 sg
->length
, qc
->pad_len
);
3746 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3748 if (dma_mapping_error(dma_address
)) {
3750 sg
->length
+= qc
->pad_len
;
3754 sg_dma_address(sg
) = dma_address
;
3755 sg_dma_len(sg
) = sg
->length
;
3758 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3759 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3765 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3766 * @qc: Command with scatter-gather table to be mapped.
3768 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3771 * spin_lock_irqsave(host lock)
3774 * Zero on success, negative on error.
3778 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3780 struct ata_port
*ap
= qc
->ap
;
3781 struct scatterlist
*sg
= qc
->__sg
;
3782 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3783 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3785 VPRINTK("ENTER, ata%u\n", ap
->id
);
3786 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3788 /* we must lengthen transfers to end on a 32-bit boundary */
3789 qc
->pad_len
= lsg
->length
& 3;
3791 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3792 struct scatterlist
*psg
= &qc
->pad_sgent
;
3793 unsigned int offset
;
3795 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3797 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3800 * psg->page/offset are used to copy to-be-written
3801 * data in this function or read data in ata_sg_clean.
3803 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3804 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3805 psg
->offset
= offset_in_page(offset
);
3807 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3808 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3809 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3810 kunmap_atomic(addr
, KM_IRQ0
);
3813 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3814 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3816 lsg
->length
-= qc
->pad_len
;
3817 if (lsg
->length
== 0)
3820 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3821 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3824 pre_n_elem
= qc
->n_elem
;
3825 if (trim_sg
&& pre_n_elem
)
3834 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3836 /* restore last sg */
3837 lsg
->length
+= qc
->pad_len
;
3841 DPRINTK("%d sg elements mapped\n", n_elem
);
3844 qc
->n_elem
= n_elem
;
3850 * swap_buf_le16 - swap halves of 16-bit words in place
3851 * @buf: Buffer to swap
3852 * @buf_words: Number of 16-bit words in buffer.
3854 * Swap halves of 16-bit words if needed to convert from
3855 * little-endian byte order to native cpu byte order, or
3859 * Inherited from caller.
3861 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3866 for (i
= 0; i
< buf_words
; i
++)
3867 buf
[i
] = le16_to_cpu(buf
[i
]);
3868 #endif /* __BIG_ENDIAN */
3872 * ata_data_xfer - Transfer data by PIO
3873 * @adev: device to target
3875 * @buflen: buffer length
3876 * @write_data: read/write
3878 * Transfer data from/to the device data register by PIO.
3881 * Inherited from caller.
3883 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3884 unsigned int buflen
, int write_data
)
3886 struct ata_port
*ap
= adev
->ap
;
3887 unsigned int words
= buflen
>> 1;
3889 /* Transfer multiple of 2 bytes */
3891 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3893 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3895 /* Transfer trailing 1 byte, if any. */
3896 if (unlikely(buflen
& 0x01)) {
3897 u16 align_buf
[1] = { 0 };
3898 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3901 memcpy(align_buf
, trailing_buf
, 1);
3902 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3904 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
3905 memcpy(trailing_buf
, align_buf
, 1);
3911 * ata_data_xfer_noirq - Transfer data by PIO
3912 * @adev: device to target
3914 * @buflen: buffer length
3915 * @write_data: read/write
3917 * Transfer data from/to the device data register by PIO. Do the
3918 * transfer with interrupts disabled.
3921 * Inherited from caller.
3923 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
3924 unsigned int buflen
, int write_data
)
3926 unsigned long flags
;
3927 local_irq_save(flags
);
3928 ata_data_xfer(adev
, buf
, buflen
, write_data
);
3929 local_irq_restore(flags
);
3934 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3935 * @qc: Command on going
3937 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3940 * Inherited from caller.
3943 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3945 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3946 struct scatterlist
*sg
= qc
->__sg
;
3947 struct ata_port
*ap
= qc
->ap
;
3949 unsigned int offset
;
3952 if (qc
->curbytes
== qc
->nbytes
- ATA_SECT_SIZE
)
3953 ap
->hsm_task_state
= HSM_ST_LAST
;
3955 page
= sg
[qc
->cursg
].page
;
3956 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
3958 /* get the current page and offset */
3959 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3960 offset
%= PAGE_SIZE
;
3962 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3964 if (PageHighMem(page
)) {
3965 unsigned long flags
;
3967 /* FIXME: use a bounce buffer */
3968 local_irq_save(flags
);
3969 buf
= kmap_atomic(page
, KM_IRQ0
);
3971 /* do the actual data transfer */
3972 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3974 kunmap_atomic(buf
, KM_IRQ0
);
3975 local_irq_restore(flags
);
3977 buf
= page_address(page
);
3978 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3981 qc
->curbytes
+= ATA_SECT_SIZE
;
3982 qc
->cursg_ofs
+= ATA_SECT_SIZE
;
3984 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
3991 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3992 * @qc: Command on going
3994 * Transfer one or many ATA_SECT_SIZE of data from/to the
3995 * ATA device for the DRQ request.
3998 * Inherited from caller.
4001 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4003 if (is_multi_taskfile(&qc
->tf
)) {
4004 /* READ/WRITE MULTIPLE */
4007 WARN_ON(qc
->dev
->multi_count
== 0);
4009 nsect
= min((qc
->nbytes
- qc
->curbytes
) / ATA_SECT_SIZE
,
4010 qc
->dev
->multi_count
);
4018 * atapi_send_cdb - Write CDB bytes to hardware
4019 * @ap: Port to which ATAPI device is attached.
4020 * @qc: Taskfile currently active
4022 * When device has indicated its readiness to accept
4023 * a CDB, this function is called. Send the CDB.
4029 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4032 DPRINTK("send cdb\n");
4033 WARN_ON(qc
->dev
->cdb_len
< 12);
4035 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4036 ata_altstatus(ap
); /* flush */
4038 switch (qc
->tf
.protocol
) {
4039 case ATA_PROT_ATAPI
:
4040 ap
->hsm_task_state
= HSM_ST
;
4042 case ATA_PROT_ATAPI_NODATA
:
4043 ap
->hsm_task_state
= HSM_ST_LAST
;
4045 case ATA_PROT_ATAPI_DMA
:
4046 ap
->hsm_task_state
= HSM_ST_LAST
;
4047 /* initiate bmdma */
4048 ap
->ops
->bmdma_start(qc
);
4054 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4055 * @qc: Command on going
4056 * @bytes: number of bytes
4058 * Transfer Transfer data from/to the ATAPI device.
4061 * Inherited from caller.
4065 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4067 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4068 struct scatterlist
*sg
= qc
->__sg
;
4069 struct ata_port
*ap
= qc
->ap
;
4072 unsigned int offset
, count
;
4074 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4075 ap
->hsm_task_state
= HSM_ST_LAST
;
4078 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4080 * The end of qc->sg is reached and the device expects
4081 * more data to transfer. In order not to overrun qc->sg
4082 * and fulfill length specified in the byte count register,
4083 * - for read case, discard trailing data from the device
4084 * - for write case, padding zero data to the device
4086 u16 pad_buf
[1] = { 0 };
4087 unsigned int words
= bytes
>> 1;
4090 if (words
) /* warning if bytes > 1 */
4091 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4092 "%u bytes trailing data\n", bytes
);
4094 for (i
= 0; i
< words
; i
++)
4095 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4097 ap
->hsm_task_state
= HSM_ST_LAST
;
4101 sg
= &qc
->__sg
[qc
->cursg
];
4104 offset
= sg
->offset
+ qc
->cursg_ofs
;
4106 /* get the current page and offset */
4107 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4108 offset
%= PAGE_SIZE
;
4110 /* don't overrun current sg */
4111 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4113 /* don't cross page boundaries */
4114 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4116 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4118 if (PageHighMem(page
)) {
4119 unsigned long flags
;
4121 /* FIXME: use bounce buffer */
4122 local_irq_save(flags
);
4123 buf
= kmap_atomic(page
, KM_IRQ0
);
4125 /* do the actual data transfer */
4126 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4128 kunmap_atomic(buf
, KM_IRQ0
);
4129 local_irq_restore(flags
);
4131 buf
= page_address(page
);
4132 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4136 qc
->curbytes
+= count
;
4137 qc
->cursg_ofs
+= count
;
4139 if (qc
->cursg_ofs
== sg
->length
) {
4149 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4150 * @qc: Command on going
4152 * Transfer Transfer data from/to the ATAPI device.
4155 * Inherited from caller.
4158 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4160 struct ata_port
*ap
= qc
->ap
;
4161 struct ata_device
*dev
= qc
->dev
;
4162 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4163 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4165 /* Abuse qc->result_tf for temp storage of intermediate TF
4166 * here to save some kernel stack usage.
4167 * For normal completion, qc->result_tf is not relevant. For
4168 * error, qc->result_tf is later overwritten by ata_qc_complete().
4169 * So, the correctness of qc->result_tf is not affected.
4171 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4172 ireason
= qc
->result_tf
.nsect
;
4173 bc_lo
= qc
->result_tf
.lbam
;
4174 bc_hi
= qc
->result_tf
.lbah
;
4175 bytes
= (bc_hi
<< 8) | bc_lo
;
4177 /* shall be cleared to zero, indicating xfer of data */
4178 if (ireason
& (1 << 0))
4181 /* make sure transfer direction matches expected */
4182 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4183 if (do_write
!= i_write
)
4186 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
4188 __atapi_pio_bytes(qc
, bytes
);
4193 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4194 qc
->err_mask
|= AC_ERR_HSM
;
4195 ap
->hsm_task_state
= HSM_ST_ERR
;
4199 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4200 * @ap: the target ata_port
4204 * 1 if ok in workqueue, 0 otherwise.
4207 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4209 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4212 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4213 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4214 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4217 if (is_atapi_taskfile(&qc
->tf
) &&
4218 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4226 * ata_hsm_qc_complete - finish a qc running on standard HSM
4227 * @qc: Command to complete
4228 * @in_wq: 1 if called from workqueue, 0 otherwise
4230 * Finish @qc which is running on standard HSM.
4233 * If @in_wq is zero, spin_lock_irqsave(host lock).
4234 * Otherwise, none on entry and grabs host lock.
4236 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4238 struct ata_port
*ap
= qc
->ap
;
4239 unsigned long flags
;
4241 if (ap
->ops
->error_handler
) {
4243 spin_lock_irqsave(ap
->lock
, flags
);
4245 /* EH might have kicked in while host lock is
4248 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4250 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4251 ap
->ops
->irq_on(ap
);
4252 ata_qc_complete(qc
);
4254 ata_port_freeze(ap
);
4257 spin_unlock_irqrestore(ap
->lock
, flags
);
4259 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4260 ata_qc_complete(qc
);
4262 ata_port_freeze(ap
);
4266 spin_lock_irqsave(ap
->lock
, flags
);
4267 ap
->ops
->irq_on(ap
);
4268 ata_qc_complete(qc
);
4269 spin_unlock_irqrestore(ap
->lock
, flags
);
4271 ata_qc_complete(qc
);
4274 ata_altstatus(ap
); /* flush */
4278 * ata_hsm_move - move the HSM to the next state.
4279 * @ap: the target ata_port
4281 * @status: current device status
4282 * @in_wq: 1 if called from workqueue, 0 otherwise
4285 * 1 when poll next status needed, 0 otherwise.
4287 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4288 u8 status
, int in_wq
)
4290 unsigned long flags
= 0;
4293 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4295 /* Make sure ata_qc_issue_prot() does not throw things
4296 * like DMA polling into the workqueue. Notice that
4297 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4299 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4302 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4303 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4305 switch (ap
->hsm_task_state
) {
4307 /* Send first data block or PACKET CDB */
4309 /* If polling, we will stay in the work queue after
4310 * sending the data. Otherwise, interrupt handler
4311 * takes over after sending the data.
4313 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4315 /* check device status */
4316 if (unlikely((status
& ATA_DRQ
) == 0)) {
4317 /* handle BSY=0, DRQ=0 as error */
4318 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4319 /* device stops HSM for abort/error */
4320 qc
->err_mask
|= AC_ERR_DEV
;
4322 /* HSM violation. Let EH handle this */
4323 qc
->err_mask
|= AC_ERR_HSM
;
4325 ap
->hsm_task_state
= HSM_ST_ERR
;
4329 /* Device should not ask for data transfer (DRQ=1)
4330 * when it finds something wrong.
4331 * We ignore DRQ here and stop the HSM by
4332 * changing hsm_task_state to HSM_ST_ERR and
4333 * let the EH abort the command or reset the device.
4335 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4336 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4338 qc
->err_mask
|= AC_ERR_HSM
;
4339 ap
->hsm_task_state
= HSM_ST_ERR
;
4343 /* Send the CDB (atapi) or the first data block (ata pio out).
4344 * During the state transition, interrupt handler shouldn't
4345 * be invoked before the data transfer is complete and
4346 * hsm_task_state is changed. Hence, the following locking.
4349 spin_lock_irqsave(ap
->lock
, flags
);
4351 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4352 /* PIO data out protocol.
4353 * send first data block.
4356 /* ata_pio_sectors() might change the state
4357 * to HSM_ST_LAST. so, the state is changed here
4358 * before ata_pio_sectors().
4360 ap
->hsm_task_state
= HSM_ST
;
4361 ata_pio_sectors(qc
);
4362 ata_altstatus(ap
); /* flush */
4365 atapi_send_cdb(ap
, qc
);
4368 spin_unlock_irqrestore(ap
->lock
, flags
);
4370 /* if polling, ata_pio_task() handles the rest.
4371 * otherwise, interrupt handler takes over from here.
4376 /* complete command or read/write the data register */
4377 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4378 /* ATAPI PIO protocol */
4379 if ((status
& ATA_DRQ
) == 0) {
4380 /* No more data to transfer or device error.
4381 * Device error will be tagged in HSM_ST_LAST.
4383 ap
->hsm_task_state
= HSM_ST_LAST
;
4387 /* Device should not ask for data transfer (DRQ=1)
4388 * when it finds something wrong.
4389 * We ignore DRQ here and stop the HSM by
4390 * changing hsm_task_state to HSM_ST_ERR and
4391 * let the EH abort the command or reset the device.
4393 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4394 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4396 qc
->err_mask
|= AC_ERR_HSM
;
4397 ap
->hsm_task_state
= HSM_ST_ERR
;
4401 atapi_pio_bytes(qc
);
4403 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4404 /* bad ireason reported by device */
4408 /* ATA PIO protocol */
4409 if (unlikely((status
& ATA_DRQ
) == 0)) {
4410 /* handle BSY=0, DRQ=0 as error */
4411 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4412 /* device stops HSM for abort/error */
4413 qc
->err_mask
|= AC_ERR_DEV
;
4415 /* HSM violation. Let EH handle this.
4416 * Phantom devices also trigger this
4417 * condition. Mark hint.
4419 qc
->err_mask
|= AC_ERR_HSM
|
4422 ap
->hsm_task_state
= HSM_ST_ERR
;
4426 /* For PIO reads, some devices may ask for
4427 * data transfer (DRQ=1) alone with ERR=1.
4428 * We respect DRQ here and transfer one
4429 * block of junk data before changing the
4430 * hsm_task_state to HSM_ST_ERR.
4432 * For PIO writes, ERR=1 DRQ=1 doesn't make
4433 * sense since the data block has been
4434 * transferred to the device.
4436 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4437 /* data might be corrputed */
4438 qc
->err_mask
|= AC_ERR_DEV
;
4440 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4441 ata_pio_sectors(qc
);
4443 status
= ata_wait_idle(ap
);
4446 if (status
& (ATA_BUSY
| ATA_DRQ
))
4447 qc
->err_mask
|= AC_ERR_HSM
;
4449 /* ata_pio_sectors() might change the
4450 * state to HSM_ST_LAST. so, the state
4451 * is changed after ata_pio_sectors().
4453 ap
->hsm_task_state
= HSM_ST_ERR
;
4457 ata_pio_sectors(qc
);
4459 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4460 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4463 status
= ata_wait_idle(ap
);
4468 ata_altstatus(ap
); /* flush */
4473 if (unlikely(!ata_ok(status
))) {
4474 qc
->err_mask
|= __ac_err_mask(status
);
4475 ap
->hsm_task_state
= HSM_ST_ERR
;
4479 /* no more data to transfer */
4480 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4481 ap
->id
, qc
->dev
->devno
, status
);
4483 WARN_ON(qc
->err_mask
);
4485 ap
->hsm_task_state
= HSM_ST_IDLE
;
4487 /* complete taskfile transaction */
4488 ata_hsm_qc_complete(qc
, in_wq
);
4494 /* make sure qc->err_mask is available to
4495 * know what's wrong and recover
4497 WARN_ON(qc
->err_mask
== 0);
4499 ap
->hsm_task_state
= HSM_ST_IDLE
;
4501 /* complete taskfile transaction */
4502 ata_hsm_qc_complete(qc
, in_wq
);
4514 static void ata_pio_task(struct work_struct
*work
)
4516 struct ata_port
*ap
=
4517 container_of(work
, struct ata_port
, port_task
.work
);
4518 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
4523 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4526 * This is purely heuristic. This is a fast path.
4527 * Sometimes when we enter, BSY will be cleared in
4528 * a chk-status or two. If not, the drive is probably seeking
4529 * or something. Snooze for a couple msecs, then
4530 * chk-status again. If still busy, queue delayed work.
4532 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4533 if (status
& ATA_BUSY
) {
4535 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4536 if (status
& ATA_BUSY
) {
4537 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4543 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4545 /* another command or interrupt handler
4546 * may be running at this point.
4553 * ata_qc_new - Request an available ATA command, for queueing
4554 * @ap: Port associated with device @dev
4555 * @dev: Device from whom we request an available command structure
4561 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4563 struct ata_queued_cmd
*qc
= NULL
;
4566 /* no command while frozen */
4567 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4570 /* the last tag is reserved for internal command. */
4571 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4572 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4573 qc
= __ata_qc_from_tag(ap
, i
);
4584 * ata_qc_new_init - Request an available ATA command, and initialize it
4585 * @dev: Device from whom we request an available command structure
4591 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4593 struct ata_port
*ap
= dev
->ap
;
4594 struct ata_queued_cmd
*qc
;
4596 qc
= ata_qc_new(ap
);
4609 * ata_qc_free - free unused ata_queued_cmd
4610 * @qc: Command to complete
4612 * Designed to free unused ata_queued_cmd object
4613 * in case something prevents using it.
4616 * spin_lock_irqsave(host lock)
4618 void ata_qc_free(struct ata_queued_cmd
*qc
)
4620 struct ata_port
*ap
= qc
->ap
;
4623 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4627 if (likely(ata_tag_valid(tag
))) {
4628 qc
->tag
= ATA_TAG_POISON
;
4629 clear_bit(tag
, &ap
->qc_allocated
);
4633 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4635 struct ata_port
*ap
= qc
->ap
;
4637 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4638 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4640 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4643 /* command should be marked inactive atomically with qc completion */
4644 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4645 ap
->sactive
&= ~(1 << qc
->tag
);
4647 ap
->active_tag
= ATA_TAG_POISON
;
4649 /* atapi: mark qc as inactive to prevent the interrupt handler
4650 * from completing the command twice later, before the error handler
4651 * is called. (when rc != 0 and atapi request sense is needed)
4653 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4654 ap
->qc_active
&= ~(1 << qc
->tag
);
4656 /* call completion callback */
4657 qc
->complete_fn(qc
);
4660 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4662 struct ata_port
*ap
= qc
->ap
;
4664 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4665 qc
->result_tf
.flags
= qc
->tf
.flags
;
4669 * ata_qc_complete - Complete an active ATA command
4670 * @qc: Command to complete
4671 * @err_mask: ATA Status register contents
4673 * Indicate to the mid and upper layers that an ATA
4674 * command has completed, with either an ok or not-ok status.
4677 * spin_lock_irqsave(host lock)
4679 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4681 struct ata_port
*ap
= qc
->ap
;
4683 /* XXX: New EH and old EH use different mechanisms to
4684 * synchronize EH with regular execution path.
4686 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4687 * Normal execution path is responsible for not accessing a
4688 * failed qc. libata core enforces the rule by returning NULL
4689 * from ata_qc_from_tag() for failed qcs.
4691 * Old EH depends on ata_qc_complete() nullifying completion
4692 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4693 * not synchronize with interrupt handler. Only PIO task is
4696 if (ap
->ops
->error_handler
) {
4697 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4699 if (unlikely(qc
->err_mask
))
4700 qc
->flags
|= ATA_QCFLAG_FAILED
;
4702 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4703 if (!ata_tag_internal(qc
->tag
)) {
4704 /* always fill result TF for failed qc */
4706 ata_qc_schedule_eh(qc
);
4711 /* read result TF if requested */
4712 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4715 __ata_qc_complete(qc
);
4717 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4720 /* read result TF if failed or requested */
4721 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4724 __ata_qc_complete(qc
);
4729 * ata_qc_complete_multiple - Complete multiple qcs successfully
4730 * @ap: port in question
4731 * @qc_active: new qc_active mask
4732 * @finish_qc: LLDD callback invoked before completing a qc
4734 * Complete in-flight commands. This functions is meant to be
4735 * called from low-level driver's interrupt routine to complete
4736 * requests normally. ap->qc_active and @qc_active is compared
4737 * and commands are completed accordingly.
4740 * spin_lock_irqsave(host lock)
4743 * Number of completed commands on success, -errno otherwise.
4745 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4746 void (*finish_qc
)(struct ata_queued_cmd
*))
4752 done_mask
= ap
->qc_active
^ qc_active
;
4754 if (unlikely(done_mask
& qc_active
)) {
4755 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4756 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4760 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4761 struct ata_queued_cmd
*qc
;
4763 if (!(done_mask
& (1 << i
)))
4766 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4769 ata_qc_complete(qc
);
4777 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4779 struct ata_port
*ap
= qc
->ap
;
4781 switch (qc
->tf
.protocol
) {
4784 case ATA_PROT_ATAPI_DMA
:
4787 case ATA_PROT_ATAPI
:
4789 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4802 * ata_qc_issue - issue taskfile to device
4803 * @qc: command to issue to device
4805 * Prepare an ATA command to submission to device.
4806 * This includes mapping the data into a DMA-able
4807 * area, filling in the S/G table, and finally
4808 * writing the taskfile to hardware, starting the command.
4811 * spin_lock_irqsave(host lock)
4813 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4815 struct ata_port
*ap
= qc
->ap
;
4817 /* Make sure only one non-NCQ command is outstanding. The
4818 * check is skipped for old EH because it reuses active qc to
4819 * request ATAPI sense.
4821 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4823 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4824 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4825 ap
->sactive
|= 1 << qc
->tag
;
4827 WARN_ON(ap
->sactive
);
4828 ap
->active_tag
= qc
->tag
;
4831 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4832 ap
->qc_active
|= 1 << qc
->tag
;
4834 if (ata_should_dma_map(qc
)) {
4835 if (qc
->flags
& ATA_QCFLAG_SG
) {
4836 if (ata_sg_setup(qc
))
4838 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4839 if (ata_sg_setup_one(qc
))
4843 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4846 ap
->ops
->qc_prep(qc
);
4848 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4849 if (unlikely(qc
->err_mask
))
4854 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4855 qc
->err_mask
|= AC_ERR_SYSTEM
;
4857 ata_qc_complete(qc
);
4861 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4862 * @qc: command to issue to device
4864 * Using various libata functions and hooks, this function
4865 * starts an ATA command. ATA commands are grouped into
4866 * classes called "protocols", and issuing each type of protocol
4867 * is slightly different.
4869 * May be used as the qc_issue() entry in ata_port_operations.
4872 * spin_lock_irqsave(host lock)
4875 * Zero on success, AC_ERR_* mask on failure
4878 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4880 struct ata_port
*ap
= qc
->ap
;
4882 /* Use polling pio if the LLD doesn't handle
4883 * interrupt driven pio and atapi CDB interrupt.
4885 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4886 switch (qc
->tf
.protocol
) {
4888 case ATA_PROT_NODATA
:
4889 case ATA_PROT_ATAPI
:
4890 case ATA_PROT_ATAPI_NODATA
:
4891 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4893 case ATA_PROT_ATAPI_DMA
:
4894 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4895 /* see ata_dma_blacklisted() */
4903 /* Some controllers show flaky interrupt behavior after
4904 * setting xfer mode. Use polling instead.
4906 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
4907 qc
->tf
.feature
== SETFEATURES_XFER
) &&
4908 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
4909 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4911 /* select the device */
4912 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4914 /* start the command */
4915 switch (qc
->tf
.protocol
) {
4916 case ATA_PROT_NODATA
:
4917 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4918 ata_qc_set_polling(qc
);
4920 ata_tf_to_host(ap
, &qc
->tf
);
4921 ap
->hsm_task_state
= HSM_ST_LAST
;
4923 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4924 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4929 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4931 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4932 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4933 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4934 ap
->hsm_task_state
= HSM_ST_LAST
;
4938 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4939 ata_qc_set_polling(qc
);
4941 ata_tf_to_host(ap
, &qc
->tf
);
4943 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4944 /* PIO data out protocol */
4945 ap
->hsm_task_state
= HSM_ST_FIRST
;
4946 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4948 /* always send first data block using
4949 * the ata_pio_task() codepath.
4952 /* PIO data in protocol */
4953 ap
->hsm_task_state
= HSM_ST
;
4955 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4956 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4958 /* if polling, ata_pio_task() handles the rest.
4959 * otherwise, interrupt handler takes over from here.
4965 case ATA_PROT_ATAPI
:
4966 case ATA_PROT_ATAPI_NODATA
:
4967 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4968 ata_qc_set_polling(qc
);
4970 ata_tf_to_host(ap
, &qc
->tf
);
4972 ap
->hsm_task_state
= HSM_ST_FIRST
;
4974 /* send cdb by polling if no cdb interrupt */
4975 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4976 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4977 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4980 case ATA_PROT_ATAPI_DMA
:
4981 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4983 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4984 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4985 ap
->hsm_task_state
= HSM_ST_FIRST
;
4987 /* send cdb by polling if no cdb interrupt */
4988 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4989 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4994 return AC_ERR_SYSTEM
;
5001 * ata_host_intr - Handle host interrupt for given (port, task)
5002 * @ap: Port on which interrupt arrived (possibly...)
5003 * @qc: Taskfile currently active in engine
5005 * Handle host interrupt for given queued command. Currently,
5006 * only DMA interrupts are handled. All other commands are
5007 * handled via polling with interrupts disabled (nIEN bit).
5010 * spin_lock_irqsave(host lock)
5013 * One if interrupt was handled, zero if not (shared irq).
5016 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5017 struct ata_queued_cmd
*qc
)
5019 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5020 u8 status
, host_stat
= 0;
5022 VPRINTK("ata%u: protocol %d task_state %d\n",
5023 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5025 /* Check whether we are expecting interrupt in this state */
5026 switch (ap
->hsm_task_state
) {
5028 /* Some pre-ATAPI-4 devices assert INTRQ
5029 * at this state when ready to receive CDB.
5032 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5033 * The flag was turned on only for atapi devices.
5034 * No need to check is_atapi_taskfile(&qc->tf) again.
5036 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5040 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5041 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5042 /* check status of DMA engine */
5043 host_stat
= ap
->ops
->bmdma_status(ap
);
5044 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
5046 /* if it's not our irq... */
5047 if (!(host_stat
& ATA_DMA_INTR
))
5050 /* before we do anything else, clear DMA-Start bit */
5051 ap
->ops
->bmdma_stop(qc
);
5053 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5054 /* error when transfering data to/from memory */
5055 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5056 ap
->hsm_task_state
= HSM_ST_ERR
;
5066 /* check altstatus */
5067 status
= ata_altstatus(ap
);
5068 if (status
& ATA_BUSY
)
5071 /* check main status, clearing INTRQ */
5072 status
= ata_chk_status(ap
);
5073 if (unlikely(status
& ATA_BUSY
))
5076 /* ack bmdma irq events */
5077 ap
->ops
->irq_clear(ap
);
5079 ata_hsm_move(ap
, qc
, status
, 0);
5081 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5082 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5083 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5085 return 1; /* irq handled */
5088 ap
->stats
.idle_irq
++;
5091 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5092 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5093 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5097 return 0; /* irq not handled */
5101 * ata_interrupt - Default ATA host interrupt handler
5102 * @irq: irq line (unused)
5103 * @dev_instance: pointer to our ata_host information structure
5105 * Default interrupt handler for PCI IDE devices. Calls
5106 * ata_host_intr() for each port that is not disabled.
5109 * Obtains host lock during operation.
5112 * IRQ_NONE or IRQ_HANDLED.
5115 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5117 struct ata_host
*host
= dev_instance
;
5119 unsigned int handled
= 0;
5120 unsigned long flags
;
5122 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5123 spin_lock_irqsave(&host
->lock
, flags
);
5125 for (i
= 0; i
< host
->n_ports
; i
++) {
5126 struct ata_port
*ap
;
5128 ap
= host
->ports
[i
];
5130 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5131 struct ata_queued_cmd
*qc
;
5133 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5134 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5135 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5136 handled
|= ata_host_intr(ap
, qc
);
5140 spin_unlock_irqrestore(&host
->lock
, flags
);
5142 return IRQ_RETVAL(handled
);
5146 * sata_scr_valid - test whether SCRs are accessible
5147 * @ap: ATA port to test SCR accessibility for
5149 * Test whether SCRs are accessible for @ap.
5155 * 1 if SCRs are accessible, 0 otherwise.
5157 int sata_scr_valid(struct ata_port
*ap
)
5159 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5163 * sata_scr_read - read SCR register of the specified port
5164 * @ap: ATA port to read SCR for
5166 * @val: Place to store read value
5168 * Read SCR register @reg of @ap into *@val. This function is
5169 * guaranteed to succeed if the cable type of the port is SATA
5170 * and the port implements ->scr_read.
5176 * 0 on success, negative errno on failure.
5178 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5180 if (sata_scr_valid(ap
)) {
5181 *val
= ap
->ops
->scr_read(ap
, reg
);
5188 * sata_scr_write - write SCR register of the specified port
5189 * @ap: ATA port to write SCR for
5190 * @reg: SCR to write
5191 * @val: value to write
5193 * Write @val to SCR register @reg of @ap. This function is
5194 * guaranteed to succeed if the cable type of the port is SATA
5195 * and the port implements ->scr_read.
5201 * 0 on success, negative errno on failure.
5203 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5205 if (sata_scr_valid(ap
)) {
5206 ap
->ops
->scr_write(ap
, reg
, val
);
5213 * sata_scr_write_flush - write SCR register of the specified port and flush
5214 * @ap: ATA port to write SCR for
5215 * @reg: SCR to write
5216 * @val: value to write
5218 * This function is identical to sata_scr_write() except that this
5219 * function performs flush after writing to the register.
5225 * 0 on success, negative errno on failure.
5227 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5229 if (sata_scr_valid(ap
)) {
5230 ap
->ops
->scr_write(ap
, reg
, val
);
5231 ap
->ops
->scr_read(ap
, reg
);
5238 * ata_port_online - test whether the given port is online
5239 * @ap: ATA port to test
5241 * Test whether @ap is online. Note that this function returns 0
5242 * if online status of @ap cannot be obtained, so
5243 * ata_port_online(ap) != !ata_port_offline(ap).
5249 * 1 if the port online status is available and online.
5251 int ata_port_online(struct ata_port
*ap
)
5255 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5261 * ata_port_offline - test whether the given port is offline
5262 * @ap: ATA port to test
5264 * Test whether @ap is offline. Note that this function returns
5265 * 0 if offline status of @ap cannot be obtained, so
5266 * ata_port_online(ap) != !ata_port_offline(ap).
5272 * 1 if the port offline status is available and offline.
5274 int ata_port_offline(struct ata_port
*ap
)
5278 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5283 int ata_flush_cache(struct ata_device
*dev
)
5285 unsigned int err_mask
;
5288 if (!ata_try_flush_cache(dev
))
5291 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5292 cmd
= ATA_CMD_FLUSH_EXT
;
5294 cmd
= ATA_CMD_FLUSH
;
5296 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5298 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5305 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5306 unsigned int action
, unsigned int ehi_flags
,
5309 unsigned long flags
;
5312 for (i
= 0; i
< host
->n_ports
; i
++) {
5313 struct ata_port
*ap
= host
->ports
[i
];
5315 /* Previous resume operation might still be in
5316 * progress. Wait for PM_PENDING to clear.
5318 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5319 ata_port_wait_eh(ap
);
5320 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5323 /* request PM ops to EH */
5324 spin_lock_irqsave(ap
->lock
, flags
);
5329 ap
->pm_result
= &rc
;
5332 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5333 ap
->eh_info
.action
|= action
;
5334 ap
->eh_info
.flags
|= ehi_flags
;
5336 ata_port_schedule_eh(ap
);
5338 spin_unlock_irqrestore(ap
->lock
, flags
);
5340 /* wait and check result */
5342 ata_port_wait_eh(ap
);
5343 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5353 * ata_host_suspend - suspend host
5354 * @host: host to suspend
5357 * Suspend @host. Actual operation is performed by EH. This
5358 * function requests EH to perform PM operations and waits for EH
5362 * Kernel thread context (may sleep).
5365 * 0 on success, -errno on failure.
5367 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5371 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5375 /* EH is quiescent now. Fail if we have any ready device.
5376 * This happens if hotplug occurs between completion of device
5377 * suspension and here.
5379 for (i
= 0; i
< host
->n_ports
; i
++) {
5380 struct ata_port
*ap
= host
->ports
[i
];
5382 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5383 struct ata_device
*dev
= &ap
->device
[j
];
5385 if (ata_dev_ready(dev
)) {
5386 ata_port_printk(ap
, KERN_WARNING
,
5387 "suspend failed, device %d "
5388 "still active\n", dev
->devno
);
5395 host
->dev
->power
.power_state
= mesg
;
5399 ata_host_resume(host
);
5404 * ata_host_resume - resume host
5405 * @host: host to resume
5407 * Resume @host. Actual operation is performed by EH. This
5408 * function requests EH to perform PM operations and returns.
5409 * Note that all resume operations are performed parallely.
5412 * Kernel thread context (may sleep).
5414 void ata_host_resume(struct ata_host
*host
)
5416 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5417 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5418 host
->dev
->power
.power_state
= PMSG_ON
;
5422 * ata_port_start - Set port up for dma.
5423 * @ap: Port to initialize
5425 * Called just after data structures for each port are
5426 * initialized. Allocates space for PRD table.
5428 * May be used as the port_start() entry in ata_port_operations.
5431 * Inherited from caller.
5433 int ata_port_start(struct ata_port
*ap
)
5435 struct device
*dev
= ap
->dev
;
5438 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5443 rc
= ata_pad_alloc(ap
, dev
);
5447 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5448 (unsigned long long)ap
->prd_dma
);
5453 * ata_dev_init - Initialize an ata_device structure
5454 * @dev: Device structure to initialize
5456 * Initialize @dev in preparation for probing.
5459 * Inherited from caller.
5461 void ata_dev_init(struct ata_device
*dev
)
5463 struct ata_port
*ap
= dev
->ap
;
5464 unsigned long flags
;
5466 /* SATA spd limit is bound to the first device */
5467 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5469 /* High bits of dev->flags are used to record warm plug
5470 * requests which occur asynchronously. Synchronize using
5473 spin_lock_irqsave(ap
->lock
, flags
);
5474 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5475 spin_unlock_irqrestore(ap
->lock
, flags
);
5477 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5478 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5479 dev
->pio_mask
= UINT_MAX
;
5480 dev
->mwdma_mask
= UINT_MAX
;
5481 dev
->udma_mask
= UINT_MAX
;
5485 * ata_port_init - Initialize an ata_port structure
5486 * @ap: Structure to initialize
5487 * @host: Collection of hosts to which @ap belongs
5488 * @ent: Probe information provided by low-level driver
5489 * @port_no: Port number associated with this ata_port
5491 * Initialize a new ata_port structure.
5494 * Inherited from caller.
5496 void ata_port_init(struct ata_port
*ap
, struct ata_host
*host
,
5497 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5501 ap
->lock
= &host
->lock
;
5502 ap
->flags
= ATA_FLAG_DISABLED
;
5503 ap
->id
= ata_unique_id
++;
5504 ap
->ctl
= ATA_DEVCTL_OBS
;
5507 ap
->port_no
= port_no
;
5508 if (port_no
== 1 && ent
->pinfo2
) {
5509 ap
->pio_mask
= ent
->pinfo2
->pio_mask
;
5510 ap
->mwdma_mask
= ent
->pinfo2
->mwdma_mask
;
5511 ap
->udma_mask
= ent
->pinfo2
->udma_mask
;
5512 ap
->flags
|= ent
->pinfo2
->flags
;
5513 ap
->ops
= ent
->pinfo2
->port_ops
;
5515 ap
->pio_mask
= ent
->pio_mask
;
5516 ap
->mwdma_mask
= ent
->mwdma_mask
;
5517 ap
->udma_mask
= ent
->udma_mask
;
5518 ap
->flags
|= ent
->port_flags
;
5519 ap
->ops
= ent
->port_ops
;
5521 ap
->hw_sata_spd_limit
= UINT_MAX
;
5522 ap
->active_tag
= ATA_TAG_POISON
;
5523 ap
->last_ctl
= 0xFF;
5525 #if defined(ATA_VERBOSE_DEBUG)
5526 /* turn on all debugging levels */
5527 ap
->msg_enable
= 0x00FF;
5528 #elif defined(ATA_DEBUG)
5529 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5531 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5534 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5535 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5536 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5537 INIT_LIST_HEAD(&ap
->eh_done_q
);
5538 init_waitqueue_head(&ap
->eh_wait_q
);
5540 /* set cable type */
5541 ap
->cbl
= ATA_CBL_NONE
;
5542 if (ap
->flags
& ATA_FLAG_SATA
)
5543 ap
->cbl
= ATA_CBL_SATA
;
5545 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5546 struct ata_device
*dev
= &ap
->device
[i
];
5553 ap
->stats
.unhandled_irq
= 1;
5554 ap
->stats
.idle_irq
= 1;
5557 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5561 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5562 * @ap: ATA port to initialize SCSI host for
5563 * @shost: SCSI host associated with @ap
5565 * Initialize SCSI host @shost associated with ATA port @ap.
5568 * Inherited from caller.
5570 static void ata_port_init_shost(struct ata_port
*ap
, struct Scsi_Host
*shost
)
5572 ap
->scsi_host
= shost
;
5574 shost
->unique_id
= ap
->id
;
5577 shost
->max_channel
= 1;
5578 shost
->max_cmd_len
= 12;
5582 * ata_port_add - Attach low-level ATA driver to system
5583 * @ent: Information provided by low-level driver
5584 * @host: Collections of ports to which we add
5585 * @port_no: Port number associated with this host
5587 * Attach low-level ATA driver to system.
5590 * PCI/etc. bus probe sem.
5593 * New ata_port on success, for NULL on error.
5595 static struct ata_port
* ata_port_add(const struct ata_probe_ent
*ent
,
5596 struct ata_host
*host
,
5597 unsigned int port_no
)
5599 struct Scsi_Host
*shost
;
5600 struct ata_port
*ap
;
5604 if (!ent
->port_ops
->error_handler
&&
5605 !(ent
->port_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5606 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5611 shost
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5615 shost
->transportt
= &ata_scsi_transport_template
;
5617 ap
= ata_shost_to_port(shost
);
5619 ata_port_init(ap
, host
, ent
, port_no
);
5620 ata_port_init_shost(ap
, shost
);
5625 static void ata_host_release(struct device
*gendev
, void *res
)
5627 struct ata_host
*host
= dev_get_drvdata(gendev
);
5630 for (i
= 0; i
< host
->n_ports
; i
++) {
5631 struct ata_port
*ap
= host
->ports
[i
];
5636 if (ap
->ops
->port_stop
)
5637 ap
->ops
->port_stop(ap
);
5639 scsi_host_put(ap
->scsi_host
);
5642 if (host
->ops
->host_stop
)
5643 host
->ops
->host_stop(host
);
5647 * ata_sas_host_init - Initialize a host struct
5648 * @host: host to initialize
5649 * @dev: device host is attached to
5650 * @flags: host flags
5654 * PCI/etc. bus probe sem.
5658 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5659 unsigned long flags
, const struct ata_port_operations
*ops
)
5661 spin_lock_init(&host
->lock
);
5663 host
->flags
= flags
;
5668 * ata_device_add - Register hardware device with ATA and SCSI layers
5669 * @ent: Probe information describing hardware device to be registered
5671 * This function processes the information provided in the probe
5672 * information struct @ent, allocates the necessary ATA and SCSI
5673 * host information structures, initializes them, and registers
5674 * everything with requisite kernel subsystems.
5676 * This function requests irqs, probes the ATA bus, and probes
5680 * PCI/etc. bus probe sem.
5683 * Number of ports registered. Zero on error (no ports registered).
5685 int ata_device_add(const struct ata_probe_ent
*ent
)
5688 struct device
*dev
= ent
->dev
;
5689 struct ata_host
*host
;
5694 if (ent
->irq
== 0) {
5695 dev_printk(KERN_ERR
, dev
, "is not available: No interrupt assigned.\n");
5699 if (!devres_open_group(dev
, ata_device_add
, GFP_KERNEL
))
5702 /* alloc a container for our list of ATA ports (buses) */
5703 host
= devres_alloc(ata_host_release
, sizeof(struct ata_host
) +
5704 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5707 devres_add(dev
, host
);
5708 dev_set_drvdata(dev
, host
);
5710 ata_host_init(host
, dev
, ent
->_host_flags
, ent
->port_ops
);
5711 host
->n_ports
= ent
->n_ports
;
5712 host
->irq
= ent
->irq
;
5713 host
->irq2
= ent
->irq2
;
5714 host
->iomap
= ent
->iomap
;
5715 host
->private_data
= ent
->private_data
;
5717 /* register each port bound to this device */
5718 for (i
= 0; i
< host
->n_ports
; i
++) {
5719 struct ata_port
*ap
;
5720 unsigned long xfer_mode_mask
;
5721 int irq_line
= ent
->irq
;
5723 ap
= ata_port_add(ent
, host
, i
);
5724 host
->ports
[i
] = ap
;
5729 if (ent
->dummy_port_mask
& (1 << i
)) {
5730 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5731 ap
->ops
= &ata_dummy_port_ops
;
5736 rc
= ap
->ops
->port_start(ap
);
5738 host
->ports
[i
] = NULL
;
5739 scsi_host_put(ap
->scsi_host
);
5743 /* Report the secondary IRQ for second channel legacy */
5744 if (i
== 1 && ent
->irq2
)
5745 irq_line
= ent
->irq2
;
5747 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5748 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5749 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5751 /* print per-port info to dmesg */
5752 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
5753 "ctl 0x%p bmdma 0x%p irq %d\n",
5754 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5755 ata_mode_string(xfer_mode_mask
),
5756 ap
->ioaddr
.cmd_addr
,
5757 ap
->ioaddr
.ctl_addr
,
5758 ap
->ioaddr
.bmdma_addr
,
5761 /* freeze port before requesting IRQ */
5762 ata_eh_freeze_port(ap
);
5765 /* obtain irq, that may be shared between channels */
5766 rc
= devm_request_irq(dev
, ent
->irq
, ent
->port_ops
->irq_handler
,
5767 ent
->irq_flags
, DRV_NAME
, host
);
5769 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5774 /* do we have a second IRQ for the other channel, eg legacy mode */
5776 /* We will get weird core code crashes later if this is true
5778 BUG_ON(ent
->irq
== ent
->irq2
);
5780 rc
= devm_request_irq(dev
, ent
->irq2
,
5781 ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5784 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5790 /* resource acquisition complete */
5791 devres_remove_group(dev
, ata_device_add
);
5793 /* perform each probe synchronously */
5794 DPRINTK("probe begin\n");
5795 for (i
= 0; i
< host
->n_ports
; i
++) {
5796 struct ata_port
*ap
= host
->ports
[i
];
5800 /* init sata_spd_limit to the current value */
5801 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
5802 int spd
= (scontrol
>> 4) & 0xf;
5803 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5805 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5807 rc
= scsi_add_host(ap
->scsi_host
, dev
);
5809 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5810 /* FIXME: do something useful here */
5811 /* FIXME: handle unconditional calls to
5812 * scsi_scan_host and ata_host_remove, below,
5817 if (ap
->ops
->error_handler
) {
5818 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5819 unsigned long flags
;
5823 /* kick EH for boot probing */
5824 spin_lock_irqsave(ap
->lock
, flags
);
5826 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
5827 ehi
->action
|= ATA_EH_SOFTRESET
;
5828 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5830 ap
->pflags
|= ATA_PFLAG_LOADING
;
5831 ata_port_schedule_eh(ap
);
5833 spin_unlock_irqrestore(ap
->lock
, flags
);
5835 /* wait for EH to finish */
5836 ata_port_wait_eh(ap
);
5838 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
5839 rc
= ata_bus_probe(ap
);
5840 DPRINTK("ata%u: bus probe end\n", ap
->id
);
5843 /* FIXME: do something useful here?
5844 * Current libata behavior will
5845 * tear down everything when
5846 * the module is removed
5847 * or the h/w is unplugged.
5853 /* probes are done, now scan each port's disk(s) */
5854 DPRINTK("host probe begin\n");
5855 for (i
= 0; i
< host
->n_ports
; i
++) {
5856 struct ata_port
*ap
= host
->ports
[i
];
5858 ata_scsi_scan_host(ap
);
5861 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5862 return ent
->n_ports
; /* success */
5865 devres_release_group(dev
, ata_device_add
);
5866 dev_set_drvdata(dev
, NULL
);
5867 VPRINTK("EXIT, returning %d\n", rc
);
5872 * ata_port_detach - Detach ATA port in prepration of device removal
5873 * @ap: ATA port to be detached
5875 * Detach all ATA devices and the associated SCSI devices of @ap;
5876 * then, remove the associated SCSI host. @ap is guaranteed to
5877 * be quiescent on return from this function.
5880 * Kernel thread context (may sleep).
5882 void ata_port_detach(struct ata_port
*ap
)
5884 unsigned long flags
;
5887 if (!ap
->ops
->error_handler
)
5890 /* tell EH we're leaving & flush EH */
5891 spin_lock_irqsave(ap
->lock
, flags
);
5892 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5893 spin_unlock_irqrestore(ap
->lock
, flags
);
5895 ata_port_wait_eh(ap
);
5897 /* EH is now guaranteed to see UNLOADING, so no new device
5898 * will be attached. Disable all existing devices.
5900 spin_lock_irqsave(ap
->lock
, flags
);
5902 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
5903 ata_dev_disable(&ap
->device
[i
]);
5905 spin_unlock_irqrestore(ap
->lock
, flags
);
5907 /* Final freeze & EH. All in-flight commands are aborted. EH
5908 * will be skipped and retrials will be terminated with bad
5911 spin_lock_irqsave(ap
->lock
, flags
);
5912 ata_port_freeze(ap
); /* won't be thawed */
5913 spin_unlock_irqrestore(ap
->lock
, flags
);
5915 ata_port_wait_eh(ap
);
5917 /* Flush hotplug task. The sequence is similar to
5918 * ata_port_flush_task().
5920 flush_workqueue(ata_aux_wq
);
5921 cancel_delayed_work(&ap
->hotplug_task
);
5922 flush_workqueue(ata_aux_wq
);
5925 /* remove the associated SCSI host */
5926 scsi_remove_host(ap
->scsi_host
);
5930 * ata_host_detach - Detach all ports of an ATA host
5931 * @host: Host to detach
5933 * Detach all ports of @host.
5936 * Kernel thread context (may sleep).
5938 void ata_host_detach(struct ata_host
*host
)
5942 for (i
= 0; i
< host
->n_ports
; i
++)
5943 ata_port_detach(host
->ports
[i
]);
5946 struct ata_probe_ent
*
5947 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
5949 struct ata_probe_ent
*probe_ent
;
5951 probe_ent
= devm_kzalloc(dev
, sizeof(*probe_ent
), GFP_KERNEL
);
5953 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
5954 kobject_name(&(dev
->kobj
)));
5958 INIT_LIST_HEAD(&probe_ent
->node
);
5959 probe_ent
->dev
= dev
;
5961 probe_ent
->sht
= port
->sht
;
5962 probe_ent
->port_flags
= port
->flags
;
5963 probe_ent
->pio_mask
= port
->pio_mask
;
5964 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
5965 probe_ent
->udma_mask
= port
->udma_mask
;
5966 probe_ent
->port_ops
= port
->port_ops
;
5967 probe_ent
->private_data
= port
->private_data
;
5973 * ata_std_ports - initialize ioaddr with standard port offsets.
5974 * @ioaddr: IO address structure to be initialized
5976 * Utility function which initializes data_addr, error_addr,
5977 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5978 * device_addr, status_addr, and command_addr to standard offsets
5979 * relative to cmd_addr.
5981 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5984 void ata_std_ports(struct ata_ioports
*ioaddr
)
5986 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
5987 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
5988 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
5989 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
5990 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
5991 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
5992 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
5993 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
5994 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
5995 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6002 * ata_pci_remove_one - PCI layer callback for device removal
6003 * @pdev: PCI device that was removed
6005 * PCI layer indicates to libata via this hook that hot-unplug or
6006 * module unload event has occurred. Detach all ports. Resource
6007 * release is handled via devres.
6010 * Inherited from PCI layer (may sleep).
6012 void ata_pci_remove_one(struct pci_dev
*pdev
)
6014 struct device
*dev
= pci_dev_to_dev(pdev
);
6015 struct ata_host
*host
= dev_get_drvdata(dev
);
6017 ata_host_detach(host
);
6020 /* move to PCI subsystem */
6021 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6023 unsigned long tmp
= 0;
6025 switch (bits
->width
) {
6028 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6034 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6040 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6051 return (tmp
== bits
->val
) ? 1 : 0;
6054 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6056 pci_save_state(pdev
);
6058 if (mesg
.event
== PM_EVENT_SUSPEND
) {
6059 pci_disable_device(pdev
);
6060 pci_set_power_state(pdev
, PCI_D3hot
);
6064 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6068 pci_set_power_state(pdev
, PCI_D0
);
6069 pci_restore_state(pdev
);
6071 rc
= pcim_enable_device(pdev
);
6073 dev_printk(KERN_ERR
, &pdev
->dev
,
6074 "failed to enable device after resume (%d)\n", rc
);
6078 pci_set_master(pdev
);
6082 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6084 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6087 rc
= ata_host_suspend(host
, mesg
);
6091 ata_pci_device_do_suspend(pdev
, mesg
);
6096 int ata_pci_device_resume(struct pci_dev
*pdev
)
6098 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6101 rc
= ata_pci_device_do_resume(pdev
);
6103 ata_host_resume(host
);
6106 #endif /* CONFIG_PCI */
6109 static int __init
ata_init(void)
6111 ata_probe_timeout
*= HZ
;
6112 ata_wq
= create_workqueue("ata");
6116 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6118 destroy_workqueue(ata_wq
);
6122 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6126 static void __exit
ata_exit(void)
6128 destroy_workqueue(ata_wq
);
6129 destroy_workqueue(ata_aux_wq
);
6132 subsys_initcall(ata_init
);
6133 module_exit(ata_exit
);
6135 static unsigned long ratelimit_time
;
6136 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6138 int ata_ratelimit(void)
6141 unsigned long flags
;
6143 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6145 if (time_after(jiffies
, ratelimit_time
)) {
6147 ratelimit_time
= jiffies
+ (HZ
/5);
6151 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6157 * ata_wait_register - wait until register value changes
6158 * @reg: IO-mapped register
6159 * @mask: Mask to apply to read register value
6160 * @val: Wait condition
6161 * @interval_msec: polling interval in milliseconds
6162 * @timeout_msec: timeout in milliseconds
6164 * Waiting for some bits of register to change is a common
6165 * operation for ATA controllers. This function reads 32bit LE
6166 * IO-mapped register @reg and tests for the following condition.
6168 * (*@reg & mask) != val
6170 * If the condition is met, it returns; otherwise, the process is
6171 * repeated after @interval_msec until timeout.
6174 * Kernel thread context (may sleep)
6177 * The final register value.
6179 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6180 unsigned long interval_msec
,
6181 unsigned long timeout_msec
)
6183 unsigned long timeout
;
6186 tmp
= ioread32(reg
);
6188 /* Calculate timeout _after_ the first read to make sure
6189 * preceding writes reach the controller before starting to
6190 * eat away the timeout.
6192 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6194 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6195 msleep(interval_msec
);
6196 tmp
= ioread32(reg
);
6205 static void ata_dummy_noret(struct ata_port
*ap
) { }
6206 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6207 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6209 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6214 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6216 return AC_ERR_SYSTEM
;
6219 const struct ata_port_operations ata_dummy_port_ops
= {
6220 .port_disable
= ata_port_disable
,
6221 .check_status
= ata_dummy_check_status
,
6222 .check_altstatus
= ata_dummy_check_status
,
6223 .dev_select
= ata_noop_dev_select
,
6224 .qc_prep
= ata_noop_qc_prep
,
6225 .qc_issue
= ata_dummy_qc_issue
,
6226 .freeze
= ata_dummy_noret
,
6227 .thaw
= ata_dummy_noret
,
6228 .error_handler
= ata_dummy_noret
,
6229 .post_internal_cmd
= ata_dummy_qc_noret
,
6230 .irq_clear
= ata_dummy_noret
,
6231 .port_start
= ata_dummy_ret0
,
6232 .port_stop
= ata_dummy_noret
,
6236 * libata is essentially a library of internal helper functions for
6237 * low-level ATA host controller drivers. As such, the API/ABI is
6238 * likely to change as new drivers are added and updated.
6239 * Do not depend on ABI/API stability.
6242 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6243 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6244 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6245 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6246 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6247 EXPORT_SYMBOL_GPL(ata_std_ports
);
6248 EXPORT_SYMBOL_GPL(ata_host_init
);
6249 EXPORT_SYMBOL_GPL(ata_device_add
);
6250 EXPORT_SYMBOL_GPL(ata_host_detach
);
6251 EXPORT_SYMBOL_GPL(ata_sg_init
);
6252 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6253 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6254 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6255 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6256 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6257 EXPORT_SYMBOL_GPL(ata_tf_load
);
6258 EXPORT_SYMBOL_GPL(ata_tf_read
);
6259 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6260 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6261 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6262 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6263 EXPORT_SYMBOL_GPL(ata_check_status
);
6264 EXPORT_SYMBOL_GPL(ata_altstatus
);
6265 EXPORT_SYMBOL_GPL(ata_exec_command
);
6266 EXPORT_SYMBOL_GPL(ata_port_start
);
6267 EXPORT_SYMBOL_GPL(ata_interrupt
);
6268 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6269 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6270 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6271 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6272 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6273 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6274 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6275 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6276 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6277 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6278 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6279 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6280 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6281 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6282 EXPORT_SYMBOL_GPL(ata_port_probe
);
6283 EXPORT_SYMBOL_GPL(sata_set_spd
);
6284 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6285 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6286 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6287 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6288 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6289 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6290 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6291 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6292 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6293 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6294 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6295 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6296 EXPORT_SYMBOL_GPL(ata_port_disable
);
6297 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6298 EXPORT_SYMBOL_GPL(ata_wait_register
);
6299 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6300 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6301 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6302 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6303 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6304 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6305 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6306 EXPORT_SYMBOL_GPL(ata_host_intr
);
6307 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6308 EXPORT_SYMBOL_GPL(sata_scr_read
);
6309 EXPORT_SYMBOL_GPL(sata_scr_write
);
6310 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6311 EXPORT_SYMBOL_GPL(ata_port_online
);
6312 EXPORT_SYMBOL_GPL(ata_port_offline
);
6313 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6314 EXPORT_SYMBOL_GPL(ata_host_resume
);
6315 EXPORT_SYMBOL_GPL(ata_id_string
);
6316 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6317 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6318 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6320 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6321 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6322 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6325 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6326 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
6327 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6328 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6329 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6330 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6331 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6332 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6333 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6334 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6335 #endif /* CONFIG_PCI */
6337 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6338 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6340 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6341 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6342 EXPORT_SYMBOL_GPL(ata_port_abort
);
6343 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6344 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6345 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6346 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6347 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6348 EXPORT_SYMBOL_GPL(ata_do_eh
);
6349 EXPORT_SYMBOL_GPL(ata_irq_on
);
6350 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6351 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6352 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6353 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);