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");
608 * ata_devchk - PATA device presence detection
609 * @ap: ATA channel to examine
610 * @device: Device to examine (starting at zero)
612 * This technique was originally described in
613 * Hale Landis's ATADRVR (www.ata-atapi.com), and
614 * later found its way into the ATA/ATAPI spec.
616 * Write a pattern to the ATA shadow registers,
617 * and if a device is present, it will respond by
618 * correctly storing and echoing back the
619 * ATA shadow register contents.
625 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
627 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
630 ap
->ops
->dev_select(ap
, device
);
632 iowrite8(0x55, ioaddr
->nsect_addr
);
633 iowrite8(0xaa, ioaddr
->lbal_addr
);
635 iowrite8(0xaa, ioaddr
->nsect_addr
);
636 iowrite8(0x55, ioaddr
->lbal_addr
);
638 iowrite8(0x55, ioaddr
->nsect_addr
);
639 iowrite8(0xaa, ioaddr
->lbal_addr
);
641 nsect
= ioread8(ioaddr
->nsect_addr
);
642 lbal
= ioread8(ioaddr
->lbal_addr
);
644 if ((nsect
== 0x55) && (lbal
== 0xaa))
645 return 1; /* we found a device */
647 return 0; /* nothing found */
651 * ata_dev_classify - determine device type based on ATA-spec signature
652 * @tf: ATA taskfile register set for device to be identified
654 * Determine from taskfile register contents whether a device is
655 * ATA or ATAPI, as per "Signature and persistence" section
656 * of ATA/PI spec (volume 1, sect 5.14).
662 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
663 * the event of failure.
666 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
668 /* Apple's open source Darwin code hints that some devices only
669 * put a proper signature into the LBA mid/high registers,
670 * So, we only check those. It's sufficient for uniqueness.
673 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
674 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
675 DPRINTK("found ATA device by sig\n");
679 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
680 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
681 DPRINTK("found ATAPI device by sig\n");
682 return ATA_DEV_ATAPI
;
685 DPRINTK("unknown device\n");
686 return ATA_DEV_UNKNOWN
;
690 * ata_dev_try_classify - Parse returned ATA device signature
691 * @ap: ATA channel to examine
692 * @device: Device to examine (starting at zero)
693 * @r_err: Value of error register on completion
695 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
696 * an ATA/ATAPI-defined set of values is placed in the ATA
697 * shadow registers, indicating the results of device detection
700 * Select the ATA device, and read the values from the ATA shadow
701 * registers. Then parse according to the Error register value,
702 * and the spec-defined values examined by ata_dev_classify().
708 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
712 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
714 struct ata_taskfile tf
;
718 ap
->ops
->dev_select(ap
, device
);
720 memset(&tf
, 0, sizeof(tf
));
722 ap
->ops
->tf_read(ap
, &tf
);
727 /* see if device passed diags: if master then continue and warn later */
728 if (err
== 0 && device
== 0)
729 /* diagnostic fail : do nothing _YET_ */
730 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
733 else if ((device
== 0) && (err
== 0x81))
738 /* determine if device is ATA or ATAPI */
739 class = ata_dev_classify(&tf
);
741 if (class == ATA_DEV_UNKNOWN
)
743 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
749 * ata_id_string - Convert IDENTIFY DEVICE page into string
750 * @id: IDENTIFY DEVICE results we will examine
751 * @s: string into which data is output
752 * @ofs: offset into identify device page
753 * @len: length of string to return. must be an even number.
755 * The strings in the IDENTIFY DEVICE page are broken up into
756 * 16-bit chunks. Run through the string, and output each
757 * 8-bit chunk linearly, regardless of platform.
763 void ata_id_string(const u16
*id
, unsigned char *s
,
764 unsigned int ofs
, unsigned int len
)
783 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
784 * @id: IDENTIFY DEVICE results we will examine
785 * @s: string into which data is output
786 * @ofs: offset into identify device page
787 * @len: length of string to return. must be an odd number.
789 * This function is identical to ata_id_string except that it
790 * trims trailing spaces and terminates the resulting string with
791 * null. @len must be actual maximum length (even number) + 1.
796 void ata_id_c_string(const u16
*id
, unsigned char *s
,
797 unsigned int ofs
, unsigned int len
)
803 ata_id_string(id
, s
, ofs
, len
- 1);
805 p
= s
+ strnlen(s
, len
- 1);
806 while (p
> s
&& p
[-1] == ' ')
811 static u64
ata_id_n_sectors(const u16
*id
)
813 if (ata_id_has_lba(id
)) {
814 if (ata_id_has_lba48(id
))
815 return ata_id_u64(id
, 100);
817 return ata_id_u32(id
, 60);
819 if (ata_id_current_chs_valid(id
))
820 return ata_id_u32(id
, 57);
822 return id
[1] * id
[3] * id
[6];
827 * ata_noop_dev_select - Select device 0/1 on ATA bus
828 * @ap: ATA channel to manipulate
829 * @device: ATA device (numbered from zero) to select
831 * This function performs no actual function.
833 * May be used as the dev_select() entry in ata_port_operations.
838 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
844 * ata_std_dev_select - Select device 0/1 on ATA bus
845 * @ap: ATA channel to manipulate
846 * @device: ATA device (numbered from zero) to select
848 * Use the method defined in the ATA specification to
849 * make either device 0, or device 1, active on the
850 * ATA channel. Works with both PIO and MMIO.
852 * May be used as the dev_select() entry in ata_port_operations.
858 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
863 tmp
= ATA_DEVICE_OBS
;
865 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
867 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
868 ata_pause(ap
); /* needed; also flushes, for mmio */
872 * ata_dev_select - Select device 0/1 on ATA bus
873 * @ap: ATA channel to manipulate
874 * @device: ATA device (numbered from zero) to select
875 * @wait: non-zero to wait for Status register BSY bit to clear
876 * @can_sleep: non-zero if context allows sleeping
878 * Use the method defined in the ATA specification to
879 * make either device 0, or device 1, active on the
882 * This is a high-level version of ata_std_dev_select(),
883 * which additionally provides the services of inserting
884 * the proper pauses and status polling, where needed.
890 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
891 unsigned int wait
, unsigned int can_sleep
)
893 if (ata_msg_probe(ap
))
894 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, ata%u: "
895 "device %u, wait %u\n", ap
->id
, device
, wait
);
900 ap
->ops
->dev_select(ap
, device
);
903 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
910 * ata_dump_id - IDENTIFY DEVICE info debugging output
911 * @id: IDENTIFY DEVICE page to dump
913 * Dump selected 16-bit words from the given IDENTIFY DEVICE
920 static inline void ata_dump_id(const u16
*id
)
922 DPRINTK("49==0x%04x "
932 DPRINTK("80==0x%04x "
942 DPRINTK("88==0x%04x "
949 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
950 * @id: IDENTIFY data to compute xfer mask from
952 * Compute the xfermask for this device. This is not as trivial
953 * as it seems if we must consider early devices correctly.
955 * FIXME: pre IDE drive timing (do we care ?).
963 static unsigned int ata_id_xfermask(const u16
*id
)
965 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
967 /* Usual case. Word 53 indicates word 64 is valid */
968 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
969 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
973 /* If word 64 isn't valid then Word 51 high byte holds
974 * the PIO timing number for the maximum. Turn it into
977 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
978 if (mode
< 5) /* Valid PIO range */
979 pio_mask
= (2 << mode
) - 1;
983 /* But wait.. there's more. Design your standards by
984 * committee and you too can get a free iordy field to
985 * process. However its the speeds not the modes that
986 * are supported... Note drivers using the timing API
987 * will get this right anyway
991 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
993 if (ata_id_is_cfa(id
)) {
995 * Process compact flash extended modes
997 int pio
= id
[163] & 0x7;
998 int dma
= (id
[163] >> 3) & 7;
1001 pio_mask
|= (1 << 5);
1003 pio_mask
|= (1 << 6);
1005 mwdma_mask
|= (1 << 3);
1007 mwdma_mask
|= (1 << 4);
1011 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1012 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1014 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1018 * ata_port_queue_task - Queue port_task
1019 * @ap: The ata_port to queue port_task for
1020 * @fn: workqueue function to be scheduled
1021 * @data: data for @fn to use
1022 * @delay: delay time for workqueue function
1024 * Schedule @fn(@data) for execution after @delay jiffies using
1025 * port_task. There is one port_task per port and it's the
1026 * user(low level driver)'s responsibility to make sure that only
1027 * one task is active at any given time.
1029 * libata core layer takes care of synchronization between
1030 * port_task and EH. ata_port_queue_task() may be ignored for EH
1034 * Inherited from caller.
1036 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1037 unsigned long delay
)
1041 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
1044 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1045 ap
->port_task_data
= data
;
1047 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1049 /* rc == 0 means that another user is using port task */
1054 * ata_port_flush_task - Flush port_task
1055 * @ap: The ata_port to flush port_task for
1057 * After this function completes, port_task is guranteed not to
1058 * be running or scheduled.
1061 * Kernel thread context (may sleep)
1063 void ata_port_flush_task(struct ata_port
*ap
)
1065 unsigned long flags
;
1069 spin_lock_irqsave(ap
->lock
, flags
);
1070 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1071 spin_unlock_irqrestore(ap
->lock
, flags
);
1073 DPRINTK("flush #1\n");
1074 flush_workqueue(ata_wq
);
1077 * At this point, if a task is running, it's guaranteed to see
1078 * the FLUSH flag; thus, it will never queue pio tasks again.
1081 if (!cancel_delayed_work(&ap
->port_task
)) {
1082 if (ata_msg_ctl(ap
))
1083 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1085 flush_workqueue(ata_wq
);
1088 spin_lock_irqsave(ap
->lock
, flags
);
1089 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1090 spin_unlock_irqrestore(ap
->lock
, flags
);
1092 if (ata_msg_ctl(ap
))
1093 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1096 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1098 struct completion
*waiting
= qc
->private_data
;
1104 * ata_exec_internal_sg - execute libata internal command
1105 * @dev: Device to which the command is sent
1106 * @tf: Taskfile registers for the command and the result
1107 * @cdb: CDB for packet command
1108 * @dma_dir: Data tranfer direction of the command
1109 * @sg: sg list for the data buffer of the command
1110 * @n_elem: Number of sg entries
1112 * Executes libata internal command with timeout. @tf contains
1113 * command on entry and result on return. Timeout and error
1114 * conditions are reported via return value. No recovery action
1115 * is taken after a command times out. It's caller's duty to
1116 * clean up after timeout.
1119 * None. Should be called with kernel context, might sleep.
1122 * Zero on success, AC_ERR_* mask on failure
1124 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1125 struct ata_taskfile
*tf
, const u8
*cdb
,
1126 int dma_dir
, struct scatterlist
*sg
,
1127 unsigned int n_elem
)
1129 struct ata_port
*ap
= dev
->ap
;
1130 u8 command
= tf
->command
;
1131 struct ata_queued_cmd
*qc
;
1132 unsigned int tag
, preempted_tag
;
1133 u32 preempted_sactive
, preempted_qc_active
;
1134 DECLARE_COMPLETION_ONSTACK(wait
);
1135 unsigned long flags
;
1136 unsigned int err_mask
;
1139 spin_lock_irqsave(ap
->lock
, flags
);
1141 /* no internal command while frozen */
1142 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1143 spin_unlock_irqrestore(ap
->lock
, flags
);
1144 return AC_ERR_SYSTEM
;
1147 /* initialize internal qc */
1149 /* XXX: Tag 0 is used for drivers with legacy EH as some
1150 * drivers choke if any other tag is given. This breaks
1151 * ata_tag_internal() test for those drivers. Don't use new
1152 * EH stuff without converting to it.
1154 if (ap
->ops
->error_handler
)
1155 tag
= ATA_TAG_INTERNAL
;
1159 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1161 qc
= __ata_qc_from_tag(ap
, tag
);
1169 preempted_tag
= ap
->active_tag
;
1170 preempted_sactive
= ap
->sactive
;
1171 preempted_qc_active
= ap
->qc_active
;
1172 ap
->active_tag
= ATA_TAG_POISON
;
1176 /* prepare & issue qc */
1179 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1180 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1181 qc
->dma_dir
= dma_dir
;
1182 if (dma_dir
!= DMA_NONE
) {
1183 unsigned int i
, buflen
= 0;
1185 for (i
= 0; i
< n_elem
; i
++)
1186 buflen
+= sg
[i
].length
;
1188 ata_sg_init(qc
, sg
, n_elem
);
1189 qc
->nbytes
= buflen
;
1192 qc
->private_data
= &wait
;
1193 qc
->complete_fn
= ata_qc_complete_internal
;
1197 spin_unlock_irqrestore(ap
->lock
, flags
);
1199 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1201 ata_port_flush_task(ap
);
1204 spin_lock_irqsave(ap
->lock
, flags
);
1206 /* We're racing with irq here. If we lose, the
1207 * following test prevents us from completing the qc
1208 * twice. If we win, the port is frozen and will be
1209 * cleaned up by ->post_internal_cmd().
1211 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1212 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1214 if (ap
->ops
->error_handler
)
1215 ata_port_freeze(ap
);
1217 ata_qc_complete(qc
);
1219 if (ata_msg_warn(ap
))
1220 ata_dev_printk(dev
, KERN_WARNING
,
1221 "qc timeout (cmd 0x%x)\n", command
);
1224 spin_unlock_irqrestore(ap
->lock
, flags
);
1227 /* do post_internal_cmd */
1228 if (ap
->ops
->post_internal_cmd
)
1229 ap
->ops
->post_internal_cmd(qc
);
1231 if ((qc
->flags
& ATA_QCFLAG_FAILED
) && !qc
->err_mask
) {
1232 if (ata_msg_warn(ap
))
1233 ata_dev_printk(dev
, KERN_WARNING
,
1234 "zero err_mask for failed "
1235 "internal command, assuming AC_ERR_OTHER\n");
1236 qc
->err_mask
|= AC_ERR_OTHER
;
1240 spin_lock_irqsave(ap
->lock
, flags
);
1242 *tf
= qc
->result_tf
;
1243 err_mask
= qc
->err_mask
;
1246 ap
->active_tag
= preempted_tag
;
1247 ap
->sactive
= preempted_sactive
;
1248 ap
->qc_active
= preempted_qc_active
;
1250 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1251 * Until those drivers are fixed, we detect the condition
1252 * here, fail the command with AC_ERR_SYSTEM and reenable the
1255 * Note that this doesn't change any behavior as internal
1256 * command failure results in disabling the device in the
1257 * higher layer for LLDDs without new reset/EH callbacks.
1259 * Kill the following code as soon as those drivers are fixed.
1261 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1262 err_mask
|= AC_ERR_SYSTEM
;
1266 spin_unlock_irqrestore(ap
->lock
, flags
);
1272 * ata_exec_internal - execute libata internal command
1273 * @dev: Device to which the command is sent
1274 * @tf: Taskfile registers for the command and the result
1275 * @cdb: CDB for packet command
1276 * @dma_dir: Data tranfer direction of the command
1277 * @buf: Data buffer of the command
1278 * @buflen: Length of data buffer
1280 * Wrapper around ata_exec_internal_sg() which takes simple
1281 * buffer instead of sg list.
1284 * None. Should be called with kernel context, might sleep.
1287 * Zero on success, AC_ERR_* mask on failure
1289 unsigned ata_exec_internal(struct ata_device
*dev
,
1290 struct ata_taskfile
*tf
, const u8
*cdb
,
1291 int dma_dir
, void *buf
, unsigned int buflen
)
1293 struct scatterlist
*psg
= NULL
, sg
;
1294 unsigned int n_elem
= 0;
1296 if (dma_dir
!= DMA_NONE
) {
1298 sg_init_one(&sg
, buf
, buflen
);
1303 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1307 * ata_do_simple_cmd - execute simple internal command
1308 * @dev: Device to which the command is sent
1309 * @cmd: Opcode to execute
1311 * Execute a 'simple' command, that only consists of the opcode
1312 * 'cmd' itself, without filling any other registers
1315 * Kernel thread context (may sleep).
1318 * Zero on success, AC_ERR_* mask on failure
1320 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1322 struct ata_taskfile tf
;
1324 ata_tf_init(dev
, &tf
);
1327 tf
.flags
|= ATA_TFLAG_DEVICE
;
1328 tf
.protocol
= ATA_PROT_NODATA
;
1330 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1334 * ata_pio_need_iordy - check if iordy needed
1337 * Check if the current speed of the device requires IORDY. Used
1338 * by various controllers for chip configuration.
1341 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1344 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1351 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1353 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1354 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1355 /* Is the speed faster than the drive allows non IORDY ? */
1357 /* This is cycle times not frequency - watch the logic! */
1358 if (pio
> 240) /* PIO2 is 240nS per cycle */
1367 * ata_dev_read_id - Read ID data from the specified device
1368 * @dev: target device
1369 * @p_class: pointer to class of the target device (may be changed)
1370 * @flags: ATA_READID_* flags
1371 * @id: buffer to read IDENTIFY data into
1373 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1374 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1375 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1376 * for pre-ATA4 drives.
1379 * Kernel thread context (may sleep)
1382 * 0 on success, -errno otherwise.
1384 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1385 unsigned int flags
, u16
*id
)
1387 struct ata_port
*ap
= dev
->ap
;
1388 unsigned int class = *p_class
;
1389 struct ata_taskfile tf
;
1390 unsigned int err_mask
= 0;
1394 if (ata_msg_ctl(ap
))
1395 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER, host %u, dev %u\n",
1396 __FUNCTION__
, ap
->id
, dev
->devno
);
1398 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1401 ata_tf_init(dev
, &tf
);
1405 tf
.command
= ATA_CMD_ID_ATA
;
1408 tf
.command
= ATA_CMD_ID_ATAPI
;
1412 reason
= "unsupported class";
1416 tf
.protocol
= ATA_PROT_PIO
;
1418 /* Some devices choke if TF registers contain garbage. Make
1419 * sure those are properly initialized.
1421 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1423 /* Device presence detection is unreliable on some
1424 * controllers. Always poll IDENTIFY if available.
1426 tf
.flags
|= ATA_TFLAG_POLLING
;
1428 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1429 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1431 if (err_mask
& AC_ERR_NODEV_HINT
) {
1432 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1433 ap
->id
, dev
->devno
);
1438 reason
= "I/O error";
1442 swap_buf_le16(id
, ATA_ID_WORDS
);
1446 reason
= "device reports illegal type";
1448 if (class == ATA_DEV_ATA
) {
1449 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1452 if (ata_id_is_ata(id
))
1456 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1458 * The exact sequence expected by certain pre-ATA4 drives is:
1461 * INITIALIZE DEVICE PARAMETERS
1463 * Some drives were very specific about that exact sequence.
1465 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1466 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1469 reason
= "INIT_DEV_PARAMS failed";
1473 /* current CHS translation info (id[53-58]) might be
1474 * changed. reread the identify device info.
1476 flags
&= ~ATA_READID_POSTRESET
;
1486 if (ata_msg_warn(ap
))
1487 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1488 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1492 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1494 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1497 static void ata_dev_config_ncq(struct ata_device
*dev
,
1498 char *desc
, size_t desc_sz
)
1500 struct ata_port
*ap
= dev
->ap
;
1501 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1503 if (!ata_id_has_ncq(dev
->id
)) {
1507 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1508 snprintf(desc
, desc_sz
, "NCQ (not used)");
1511 if (ap
->flags
& ATA_FLAG_NCQ
) {
1512 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1513 dev
->flags
|= ATA_DFLAG_NCQ
;
1516 if (hdepth
>= ddepth
)
1517 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1519 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1522 static void ata_set_port_max_cmd_len(struct ata_port
*ap
)
1526 if (ap
->scsi_host
) {
1527 unsigned int len
= 0;
1529 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1530 len
= max(len
, ap
->device
[i
].cdb_len
);
1532 ap
->scsi_host
->max_cmd_len
= len
;
1537 * ata_dev_configure - Configure the specified ATA/ATAPI device
1538 * @dev: Target device to configure
1540 * Configure @dev according to @dev->id. Generic and low-level
1541 * driver specific fixups are also applied.
1544 * Kernel thread context (may sleep)
1547 * 0 on success, -errno otherwise
1549 int ata_dev_configure(struct ata_device
*dev
)
1551 struct ata_port
*ap
= dev
->ap
;
1552 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1553 const u16
*id
= dev
->id
;
1554 unsigned int xfer_mask
;
1555 char revbuf
[7]; /* XYZ-99\0 */
1556 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1557 char modelbuf
[ATA_ID_PROD_LEN
+1];
1560 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1561 ata_dev_printk(dev
, KERN_INFO
,
1562 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1563 __FUNCTION__
, ap
->id
, dev
->devno
);
1567 if (ata_msg_probe(ap
))
1568 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER, host %u, dev %u\n",
1569 __FUNCTION__
, ap
->id
, dev
->devno
);
1572 rc
= ata_acpi_push_id(ap
, dev
->devno
);
1574 ata_dev_printk(dev
, KERN_WARNING
, "failed to set _SDD(%d)\n",
1578 /* retrieve and execute the ATA task file of _GTF */
1579 ata_acpi_exec_tfs(ap
);
1581 /* print device capabilities */
1582 if (ata_msg_probe(ap
))
1583 ata_dev_printk(dev
, KERN_DEBUG
,
1584 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1585 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1587 id
[49], id
[82], id
[83], id
[84],
1588 id
[85], id
[86], id
[87], id
[88]);
1590 /* initialize to-be-configured parameters */
1591 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1592 dev
->max_sectors
= 0;
1600 * common ATA, ATAPI feature tests
1603 /* find max transfer mode; for printk only */
1604 xfer_mask
= ata_id_xfermask(id
);
1606 if (ata_msg_probe(ap
))
1609 /* ATA-specific feature tests */
1610 if (dev
->class == ATA_DEV_ATA
) {
1611 if (ata_id_is_cfa(id
)) {
1612 if (id
[162] & 1) /* CPRM may make this media unusable */
1613 ata_dev_printk(dev
, KERN_WARNING
, "ata%u: device %u supports DRM functions and may not be fully accessable.\n",
1614 ap
->id
, dev
->devno
);
1615 snprintf(revbuf
, 7, "CFA");
1618 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1620 dev
->n_sectors
= ata_id_n_sectors(id
);
1622 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1623 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1626 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1629 if (dev
->id
[59] & 0x100)
1630 dev
->multi_count
= dev
->id
[59] & 0xff;
1632 if (ata_id_has_lba(id
)) {
1633 const char *lba_desc
;
1637 dev
->flags
|= ATA_DFLAG_LBA
;
1638 if (ata_id_has_lba48(id
)) {
1639 dev
->flags
|= ATA_DFLAG_LBA48
;
1642 if (dev
->n_sectors
>= (1UL << 28) &&
1643 ata_id_has_flush_ext(id
))
1644 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1648 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1650 /* print device info to dmesg */
1651 if (ata_msg_drv(ap
) && print_info
) {
1652 ata_dev_printk(dev
, KERN_INFO
,
1653 "%s: %s, %s, max %s\n",
1654 revbuf
, modelbuf
, fwrevbuf
,
1655 ata_mode_string(xfer_mask
));
1656 ata_dev_printk(dev
, KERN_INFO
,
1657 "%Lu sectors, multi %u: %s %s\n",
1658 (unsigned long long)dev
->n_sectors
,
1659 dev
->multi_count
, lba_desc
, ncq_desc
);
1664 /* Default translation */
1665 dev
->cylinders
= id
[1];
1667 dev
->sectors
= id
[6];
1669 if (ata_id_current_chs_valid(id
)) {
1670 /* Current CHS translation is valid. */
1671 dev
->cylinders
= id
[54];
1672 dev
->heads
= id
[55];
1673 dev
->sectors
= id
[56];
1676 /* print device info to dmesg */
1677 if (ata_msg_drv(ap
) && print_info
) {
1678 ata_dev_printk(dev
, KERN_INFO
,
1679 "%s: %s, %s, max %s\n",
1680 revbuf
, modelbuf
, fwrevbuf
,
1681 ata_mode_string(xfer_mask
));
1682 ata_dev_printk(dev
, KERN_INFO
,
1683 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1684 (unsigned long long)dev
->n_sectors
,
1685 dev
->multi_count
, dev
->cylinders
,
1686 dev
->heads
, dev
->sectors
);
1693 /* ATAPI-specific feature tests */
1694 else if (dev
->class == ATA_DEV_ATAPI
) {
1695 char *cdb_intr_string
= "";
1697 rc
= atapi_cdb_len(id
);
1698 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1699 if (ata_msg_warn(ap
))
1700 ata_dev_printk(dev
, KERN_WARNING
,
1701 "unsupported CDB len\n");
1705 dev
->cdb_len
= (unsigned int) rc
;
1707 if (ata_id_cdb_intr(dev
->id
)) {
1708 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1709 cdb_intr_string
= ", CDB intr";
1712 /* print device info to dmesg */
1713 if (ata_msg_drv(ap
) && print_info
)
1714 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1715 ata_mode_string(xfer_mask
),
1719 /* determine max_sectors */
1720 dev
->max_sectors
= ATA_MAX_SECTORS
;
1721 if (dev
->flags
& ATA_DFLAG_LBA48
)
1722 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1724 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1725 /* Let the user know. We don't want to disallow opens for
1726 rescue purposes, or in case the vendor is just a blithering
1729 ata_dev_printk(dev
, KERN_WARNING
,
1730 "Drive reports diagnostics failure. This may indicate a drive\n");
1731 ata_dev_printk(dev
, KERN_WARNING
,
1732 "fault or invalid emulation. Contact drive vendor for information.\n");
1736 ata_set_port_max_cmd_len(ap
);
1738 /* limit bridge transfers to udma5, 200 sectors */
1739 if (ata_dev_knobble(dev
)) {
1740 if (ata_msg_drv(ap
) && print_info
)
1741 ata_dev_printk(dev
, KERN_INFO
,
1742 "applying bridge limits\n");
1743 dev
->udma_mask
&= ATA_UDMA5
;
1744 dev
->max_sectors
= ATA_MAX_SECTORS
;
1747 if (ap
->ops
->dev_config
)
1748 ap
->ops
->dev_config(ap
, dev
);
1750 if (ata_msg_probe(ap
))
1751 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
1752 __FUNCTION__
, ata_chk_status(ap
));
1756 if (ata_msg_probe(ap
))
1757 ata_dev_printk(dev
, KERN_DEBUG
,
1758 "%s: EXIT, err\n", __FUNCTION__
);
1763 * ata_bus_probe - Reset and probe ATA bus
1766 * Master ATA bus probing function. Initiates a hardware-dependent
1767 * bus reset, then attempts to identify any devices found on
1771 * PCI/etc. bus probe sem.
1774 * Zero on success, negative errno otherwise.
1777 int ata_bus_probe(struct ata_port
*ap
)
1779 unsigned int classes
[ATA_MAX_DEVICES
];
1780 int tries
[ATA_MAX_DEVICES
];
1781 int i
, rc
, down_xfermask
;
1782 struct ata_device
*dev
;
1787 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1788 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1793 /* reset and determine device classes */
1794 ap
->ops
->phy_reset(ap
);
1796 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1797 dev
= &ap
->device
[i
];
1799 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
1800 dev
->class != ATA_DEV_UNKNOWN
)
1801 classes
[dev
->devno
] = dev
->class;
1803 classes
[dev
->devno
] = ATA_DEV_NONE
;
1805 dev
->class = ATA_DEV_UNKNOWN
;
1810 /* after the reset the device state is PIO 0 and the controller
1811 state is undefined. Record the mode */
1813 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1814 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
1816 /* read IDENTIFY page and configure devices */
1817 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1818 dev
= &ap
->device
[i
];
1821 dev
->class = classes
[i
];
1823 if (!ata_dev_enabled(dev
))
1826 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
1831 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
1832 rc
= ata_dev_configure(dev
);
1833 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
1838 /* configure transfer mode */
1839 rc
= ata_set_mode(ap
, &dev
);
1845 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1846 if (ata_dev_enabled(&ap
->device
[i
]))
1849 /* no device present, disable port */
1850 ata_port_disable(ap
);
1851 ap
->ops
->port_disable(ap
);
1858 tries
[dev
->devno
] = 0;
1861 sata_down_spd_limit(ap
);
1864 tries
[dev
->devno
]--;
1865 dnxfer_sel
= ATA_DNXFER_ANY
;
1866 if (tries
[dev
->devno
] == 1)
1867 dnxfer_sel
= ATA_DNXFER_FORCE_PIO0
;
1868 if (down_xfermask
&& ata_down_xfermask_limit(dev
, dnxfer_sel
))
1869 tries
[dev
->devno
] = 0;
1872 if (!tries
[dev
->devno
]) {
1873 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
);
1874 ata_dev_disable(dev
);
1881 * ata_port_probe - Mark port as enabled
1882 * @ap: Port for which we indicate enablement
1884 * Modify @ap data structure such that the system
1885 * thinks that the entire port is enabled.
1887 * LOCKING: host lock, or some other form of
1891 void ata_port_probe(struct ata_port
*ap
)
1893 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1897 * sata_print_link_status - Print SATA link status
1898 * @ap: SATA port to printk link status about
1900 * This function prints link speed and status of a SATA link.
1905 static void sata_print_link_status(struct ata_port
*ap
)
1907 u32 sstatus
, scontrol
, tmp
;
1909 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1911 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1913 if (ata_port_online(ap
)) {
1914 tmp
= (sstatus
>> 4) & 0xf;
1915 ata_port_printk(ap
, KERN_INFO
,
1916 "SATA link up %s (SStatus %X SControl %X)\n",
1917 sata_spd_string(tmp
), sstatus
, scontrol
);
1919 ata_port_printk(ap
, KERN_INFO
,
1920 "SATA link down (SStatus %X SControl %X)\n",
1926 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1927 * @ap: SATA port associated with target SATA PHY.
1929 * This function issues commands to standard SATA Sxxx
1930 * PHY registers, to wake up the phy (and device), and
1931 * clear any reset condition.
1934 * PCI/etc. bus probe sem.
1937 void __sata_phy_reset(struct ata_port
*ap
)
1940 unsigned long timeout
= jiffies
+ (HZ
* 5);
1942 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1943 /* issue phy wake/reset */
1944 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1945 /* Couldn't find anything in SATA I/II specs, but
1946 * AHCI-1.1 10.4.2 says at least 1 ms. */
1949 /* phy wake/clear reset */
1950 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1952 /* wait for phy to become ready, if necessary */
1955 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1956 if ((sstatus
& 0xf) != 1)
1958 } while (time_before(jiffies
, timeout
));
1960 /* print link status */
1961 sata_print_link_status(ap
);
1963 /* TODO: phy layer with polling, timeouts, etc. */
1964 if (!ata_port_offline(ap
))
1967 ata_port_disable(ap
);
1969 if (ap
->flags
& ATA_FLAG_DISABLED
)
1972 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1973 ata_port_disable(ap
);
1977 ap
->cbl
= ATA_CBL_SATA
;
1981 * sata_phy_reset - Reset SATA bus.
1982 * @ap: SATA port associated with target SATA PHY.
1984 * This function resets the SATA bus, and then probes
1985 * the bus for devices.
1988 * PCI/etc. bus probe sem.
1991 void sata_phy_reset(struct ata_port
*ap
)
1993 __sata_phy_reset(ap
);
1994 if (ap
->flags
& ATA_FLAG_DISABLED
)
2000 * ata_dev_pair - return other device on cable
2003 * Obtain the other device on the same cable, or if none is
2004 * present NULL is returned
2007 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2009 struct ata_port
*ap
= adev
->ap
;
2010 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2011 if (!ata_dev_enabled(pair
))
2017 * ata_port_disable - Disable port.
2018 * @ap: Port to be disabled.
2020 * Modify @ap data structure such that the system
2021 * thinks that the entire port is disabled, and should
2022 * never attempt to probe or communicate with devices
2025 * LOCKING: host lock, or some other form of
2029 void ata_port_disable(struct ata_port
*ap
)
2031 ap
->device
[0].class = ATA_DEV_NONE
;
2032 ap
->device
[1].class = ATA_DEV_NONE
;
2033 ap
->flags
|= ATA_FLAG_DISABLED
;
2037 * sata_down_spd_limit - adjust SATA spd limit downward
2038 * @ap: Port to adjust SATA spd limit for
2040 * Adjust SATA spd limit of @ap downward. Note that this
2041 * function only adjusts the limit. The change must be applied
2042 * using sata_set_spd().
2045 * Inherited from caller.
2048 * 0 on success, negative errno on failure
2050 int sata_down_spd_limit(struct ata_port
*ap
)
2052 u32 sstatus
, spd
, mask
;
2055 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2059 mask
= ap
->sata_spd_limit
;
2062 highbit
= fls(mask
) - 1;
2063 mask
&= ~(1 << highbit
);
2065 spd
= (sstatus
>> 4) & 0xf;
2069 mask
&= (1 << spd
) - 1;
2073 ap
->sata_spd_limit
= mask
;
2075 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2076 sata_spd_string(fls(mask
)));
2081 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2085 if (ap
->sata_spd_limit
== UINT_MAX
)
2088 limit
= fls(ap
->sata_spd_limit
);
2090 spd
= (*scontrol
>> 4) & 0xf;
2091 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2093 return spd
!= limit
;
2097 * sata_set_spd_needed - is SATA spd configuration needed
2098 * @ap: Port in question
2100 * Test whether the spd limit in SControl matches
2101 * @ap->sata_spd_limit. This function is used to determine
2102 * whether hardreset is necessary to apply SATA spd
2106 * Inherited from caller.
2109 * 1 if SATA spd configuration is needed, 0 otherwise.
2111 int sata_set_spd_needed(struct ata_port
*ap
)
2115 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2118 return __sata_set_spd_needed(ap
, &scontrol
);
2122 * sata_set_spd - set SATA spd according to spd limit
2123 * @ap: Port to set SATA spd for
2125 * Set SATA spd of @ap according to sata_spd_limit.
2128 * Inherited from caller.
2131 * 0 if spd doesn't need to be changed, 1 if spd has been
2132 * changed. Negative errno if SCR registers are inaccessible.
2134 int sata_set_spd(struct ata_port
*ap
)
2139 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2142 if (!__sata_set_spd_needed(ap
, &scontrol
))
2145 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2152 * This mode timing computation functionality is ported over from
2153 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2156 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2157 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2158 * for UDMA6, which is currently supported only by Maxtor drives.
2160 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2163 static const struct ata_timing ata_timing
[] = {
2165 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2166 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2167 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2168 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2170 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2171 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2172 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2173 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2174 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2176 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2178 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2179 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2180 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2182 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2183 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2184 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2186 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2187 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2188 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2189 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2191 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2192 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2193 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2195 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2200 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2201 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2203 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2205 q
->setup
= EZ(t
->setup
* 1000, T
);
2206 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2207 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2208 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2209 q
->active
= EZ(t
->active
* 1000, T
);
2210 q
->recover
= EZ(t
->recover
* 1000, T
);
2211 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2212 q
->udma
= EZ(t
->udma
* 1000, UT
);
2215 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2216 struct ata_timing
*m
, unsigned int what
)
2218 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2219 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2220 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2221 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2222 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2223 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2224 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2225 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2228 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2230 const struct ata_timing
*t
;
2232 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2233 if (t
->mode
== 0xFF)
2238 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2239 struct ata_timing
*t
, int T
, int UT
)
2241 const struct ata_timing
*s
;
2242 struct ata_timing p
;
2248 if (!(s
= ata_timing_find_mode(speed
)))
2251 memcpy(t
, s
, sizeof(*s
));
2254 * If the drive is an EIDE drive, it can tell us it needs extended
2255 * PIO/MW_DMA cycle timing.
2258 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2259 memset(&p
, 0, sizeof(p
));
2260 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2261 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2262 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2263 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2264 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2266 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2270 * Convert the timing to bus clock counts.
2273 ata_timing_quantize(t
, t
, T
, UT
);
2276 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2277 * S.M.A.R.T * and some other commands. We have to ensure that the
2278 * DMA cycle timing is slower/equal than the fastest PIO timing.
2281 if (speed
> XFER_PIO_6
) {
2282 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2283 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2287 * Lengthen active & recovery time so that cycle time is correct.
2290 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2291 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2292 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2295 if (t
->active
+ t
->recover
< t
->cycle
) {
2296 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2297 t
->recover
= t
->cycle
- t
->active
;
2304 * ata_down_xfermask_limit - adjust dev xfer masks downward
2305 * @dev: Device to adjust xfer masks
2306 * @sel: ATA_DNXFER_* selector
2308 * Adjust xfer masks of @dev downward. Note that this function
2309 * does not apply the change. Invoking ata_set_mode() afterwards
2310 * will apply the limit.
2313 * Inherited from caller.
2316 * 0 on success, negative errno on failure
2318 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2321 unsigned int orig_mask
, xfer_mask
;
2322 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2325 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2326 sel
&= ~ATA_DNXFER_QUIET
;
2328 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2331 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2334 case ATA_DNXFER_PIO
:
2335 highbit
= fls(pio_mask
) - 1;
2336 pio_mask
&= ~(1 << highbit
);
2339 case ATA_DNXFER_DMA
:
2341 highbit
= fls(udma_mask
) - 1;
2342 udma_mask
&= ~(1 << highbit
);
2345 } else if (mwdma_mask
) {
2346 highbit
= fls(mwdma_mask
) - 1;
2347 mwdma_mask
&= ~(1 << highbit
);
2353 case ATA_DNXFER_40C
:
2354 udma_mask
&= ATA_UDMA_MASK_40C
;
2357 case ATA_DNXFER_FORCE_PIO0
:
2359 case ATA_DNXFER_FORCE_PIO
:
2364 case ATA_DNXFER_ANY
:
2365 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2366 if (xfer_mask
& ATA_MASK_UDMA
)
2367 xfer_mask
&= ~ATA_MASK_MWDMA
;
2369 highbit
= fls(xfer_mask
) - 1;
2370 xfer_mask
&= ~(1 << highbit
);
2377 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2379 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2383 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2384 snprintf(buf
, sizeof(buf
), "%s:%s",
2385 ata_mode_string(xfer_mask
),
2386 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2388 snprintf(buf
, sizeof(buf
), "%s",
2389 ata_mode_string(xfer_mask
));
2391 ata_dev_printk(dev
, KERN_WARNING
,
2392 "limiting speed to %s\n", buf
);
2395 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2401 static int ata_dev_set_mode(struct ata_device
*dev
)
2403 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2404 unsigned int err_mask
;
2407 dev
->flags
&= ~ATA_DFLAG_PIO
;
2408 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2409 dev
->flags
|= ATA_DFLAG_PIO
;
2411 err_mask
= ata_dev_set_xfermode(dev
);
2412 /* Old CFA may refuse this command, which is just fine */
2413 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2414 err_mask
&= ~AC_ERR_DEV
;
2417 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2418 "(err_mask=0x%x)\n", err_mask
);
2422 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2423 rc
= ata_dev_revalidate(dev
, 0);
2424 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2428 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2429 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2431 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2432 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2437 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2438 * @ap: port on which timings will be programmed
2439 * @r_failed_dev: out paramter for failed device
2441 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2442 * ata_set_mode() fails, pointer to the failing device is
2443 * returned in @r_failed_dev.
2446 * PCI/etc. bus probe sem.
2449 * 0 on success, negative errno otherwise
2451 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2453 struct ata_device
*dev
;
2454 int i
, rc
= 0, used_dma
= 0, found
= 0;
2456 /* has private set_mode? */
2457 if (ap
->ops
->set_mode
)
2458 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2460 /* step 1: calculate xfer_mask */
2461 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2462 unsigned int pio_mask
, dma_mask
;
2464 dev
= &ap
->device
[i
];
2466 if (!ata_dev_enabled(dev
))
2469 ata_dev_xfermask(dev
);
2471 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2472 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2473 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2474 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2483 /* step 2: always set host PIO timings */
2484 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2485 dev
= &ap
->device
[i
];
2486 if (!ata_dev_enabled(dev
))
2489 if (!dev
->pio_mode
) {
2490 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2495 dev
->xfer_mode
= dev
->pio_mode
;
2496 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2497 if (ap
->ops
->set_piomode
)
2498 ap
->ops
->set_piomode(ap
, dev
);
2501 /* step 3: set host DMA timings */
2502 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2503 dev
= &ap
->device
[i
];
2505 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2508 dev
->xfer_mode
= dev
->dma_mode
;
2509 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2510 if (ap
->ops
->set_dmamode
)
2511 ap
->ops
->set_dmamode(ap
, dev
);
2514 /* step 4: update devices' xfer mode */
2515 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2516 dev
= &ap
->device
[i
];
2518 /* don't update suspended devices' xfer mode */
2519 if (!ata_dev_ready(dev
))
2522 rc
= ata_dev_set_mode(dev
);
2527 /* Record simplex status. If we selected DMA then the other
2528 * host channels are not permitted to do so.
2530 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2531 ap
->host
->simplex_claimed
= 1;
2533 /* step5: chip specific finalisation */
2534 if (ap
->ops
->post_set_mode
)
2535 ap
->ops
->post_set_mode(ap
);
2539 *r_failed_dev
= dev
;
2544 * ata_tf_to_host - issue ATA taskfile to host controller
2545 * @ap: port to which command is being issued
2546 * @tf: ATA taskfile register set
2548 * Issues ATA taskfile register set to ATA host controller,
2549 * with proper synchronization with interrupt handler and
2553 * spin_lock_irqsave(host lock)
2556 static inline void ata_tf_to_host(struct ata_port
*ap
,
2557 const struct ata_taskfile
*tf
)
2559 ap
->ops
->tf_load(ap
, tf
);
2560 ap
->ops
->exec_command(ap
, tf
);
2564 * ata_busy_sleep - sleep until BSY clears, or timeout
2565 * @ap: port containing status register to be polled
2566 * @tmout_pat: impatience timeout
2567 * @tmout: overall timeout
2569 * Sleep until ATA Status register bit BSY clears,
2570 * or a timeout occurs.
2573 * Kernel thread context (may sleep).
2576 * 0 on success, -errno otherwise.
2578 int ata_busy_sleep(struct ata_port
*ap
,
2579 unsigned long tmout_pat
, unsigned long tmout
)
2581 unsigned long timer_start
, timeout
;
2584 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2585 timer_start
= jiffies
;
2586 timeout
= timer_start
+ tmout_pat
;
2587 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2588 time_before(jiffies
, timeout
)) {
2590 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2593 if (status
!= 0xff && (status
& ATA_BUSY
))
2594 ata_port_printk(ap
, KERN_WARNING
,
2595 "port is slow to respond, please be patient "
2596 "(Status 0x%x)\n", status
);
2598 timeout
= timer_start
+ tmout
;
2599 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2600 time_before(jiffies
, timeout
)) {
2602 status
= ata_chk_status(ap
);
2608 if (status
& ATA_BUSY
) {
2609 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2610 "(%lu secs, Status 0x%x)\n",
2611 tmout
/ HZ
, status
);
2618 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2620 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2621 unsigned int dev0
= devmask
& (1 << 0);
2622 unsigned int dev1
= devmask
& (1 << 1);
2623 unsigned long timeout
;
2625 /* if device 0 was found in ata_devchk, wait for its
2629 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2631 /* if device 1 was found in ata_devchk, wait for
2632 * register access, then wait for BSY to clear
2634 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2638 ap
->ops
->dev_select(ap
, 1);
2639 nsect
= ioread8(ioaddr
->nsect_addr
);
2640 lbal
= ioread8(ioaddr
->lbal_addr
);
2641 if ((nsect
== 1) && (lbal
== 1))
2643 if (time_after(jiffies
, timeout
)) {
2647 msleep(50); /* give drive a breather */
2650 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2652 /* is all this really necessary? */
2653 ap
->ops
->dev_select(ap
, 0);
2655 ap
->ops
->dev_select(ap
, 1);
2657 ap
->ops
->dev_select(ap
, 0);
2660 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2661 unsigned int devmask
)
2663 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2665 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2667 /* software reset. causes dev0 to be selected */
2668 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2669 udelay(20); /* FIXME: flush */
2670 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2671 udelay(20); /* FIXME: flush */
2672 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2674 /* spec mandates ">= 2ms" before checking status.
2675 * We wait 150ms, because that was the magic delay used for
2676 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2677 * between when the ATA command register is written, and then
2678 * status is checked. Because waiting for "a while" before
2679 * checking status is fine, post SRST, we perform this magic
2680 * delay here as well.
2682 * Old drivers/ide uses the 2mS rule and then waits for ready
2686 /* Before we perform post reset processing we want to see if
2687 * the bus shows 0xFF because the odd clown forgets the D7
2688 * pulldown resistor.
2690 if (ata_check_status(ap
) == 0xFF)
2693 ata_bus_post_reset(ap
, devmask
);
2699 * ata_bus_reset - reset host port and associated ATA channel
2700 * @ap: port to reset
2702 * This is typically the first time we actually start issuing
2703 * commands to the ATA channel. We wait for BSY to clear, then
2704 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2705 * result. Determine what devices, if any, are on the channel
2706 * by looking at the device 0/1 error register. Look at the signature
2707 * stored in each device's taskfile registers, to determine if
2708 * the device is ATA or ATAPI.
2711 * PCI/etc. bus probe sem.
2712 * Obtains host lock.
2715 * Sets ATA_FLAG_DISABLED if bus reset fails.
2718 void ata_bus_reset(struct ata_port
*ap
)
2720 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2721 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2723 unsigned int dev0
, dev1
= 0, devmask
= 0;
2725 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2727 /* determine if device 0/1 are present */
2728 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2731 dev0
= ata_devchk(ap
, 0);
2733 dev1
= ata_devchk(ap
, 1);
2737 devmask
|= (1 << 0);
2739 devmask
|= (1 << 1);
2741 /* select device 0 again */
2742 ap
->ops
->dev_select(ap
, 0);
2744 /* issue bus reset */
2745 if (ap
->flags
& ATA_FLAG_SRST
)
2746 if (ata_bus_softreset(ap
, devmask
))
2750 * determine by signature whether we have ATA or ATAPI devices
2752 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2753 if ((slave_possible
) && (err
!= 0x81))
2754 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2756 /* re-enable interrupts */
2757 ap
->ops
->irq_on(ap
);
2759 /* is double-select really necessary? */
2760 if (ap
->device
[1].class != ATA_DEV_NONE
)
2761 ap
->ops
->dev_select(ap
, 1);
2762 if (ap
->device
[0].class != ATA_DEV_NONE
)
2763 ap
->ops
->dev_select(ap
, 0);
2765 /* if no devices were detected, disable this port */
2766 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2767 (ap
->device
[1].class == ATA_DEV_NONE
))
2770 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2771 /* set up device control for ATA_FLAG_SATA_RESET */
2772 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2779 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2780 ap
->ops
->port_disable(ap
);
2786 * sata_phy_debounce - debounce SATA phy status
2787 * @ap: ATA port to debounce SATA phy status for
2788 * @params: timing parameters { interval, duratinon, timeout } in msec
2790 * Make sure SStatus of @ap reaches stable state, determined by
2791 * holding the same value where DET is not 1 for @duration polled
2792 * every @interval, before @timeout. Timeout constraints the
2793 * beginning of the stable state. Because, after hot unplugging,
2794 * DET gets stuck at 1 on some controllers, this functions waits
2795 * until timeout then returns 0 if DET is stable at 1.
2798 * Kernel thread context (may sleep)
2801 * 0 on success, -errno on failure.
2803 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
2805 unsigned long interval_msec
= params
[0];
2806 unsigned long duration
= params
[1] * HZ
/ 1000;
2807 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
2808 unsigned long last_jiffies
;
2812 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2817 last_jiffies
= jiffies
;
2820 msleep(interval_msec
);
2821 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2827 if (cur
== 1 && time_before(jiffies
, timeout
))
2829 if (time_after(jiffies
, last_jiffies
+ duration
))
2834 /* unstable, start over */
2836 last_jiffies
= jiffies
;
2839 if (time_after(jiffies
, timeout
))
2845 * sata_phy_resume - resume SATA phy
2846 * @ap: ATA port to resume SATA phy for
2847 * @params: timing parameters { interval, duratinon, timeout } in msec
2849 * Resume SATA phy of @ap and debounce it.
2852 * Kernel thread context (may sleep)
2855 * 0 on success, -errno on failure.
2857 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
2862 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2865 scontrol
= (scontrol
& 0x0f0) | 0x300;
2867 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2870 /* Some PHYs react badly if SStatus is pounded immediately
2871 * after resuming. Delay 200ms before debouncing.
2875 return sata_phy_debounce(ap
, params
);
2878 static void ata_wait_spinup(struct ata_port
*ap
)
2880 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2881 unsigned long end
, secs
;
2884 /* first, debounce phy if SATA */
2885 if (ap
->cbl
== ATA_CBL_SATA
) {
2886 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
2888 /* if debounced successfully and offline, no need to wait */
2889 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
2893 /* okay, let's give the drive time to spin up */
2894 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
2895 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
2897 if (time_after(jiffies
, end
))
2901 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
2902 "(%lu secs)\n", secs
);
2904 schedule_timeout_uninterruptible(end
- jiffies
);
2908 * ata_std_prereset - prepare for reset
2909 * @ap: ATA port to be reset
2911 * @ap is about to be reset. Initialize it.
2914 * Kernel thread context (may sleep)
2917 * 0 on success, -errno otherwise.
2919 int ata_std_prereset(struct ata_port
*ap
)
2921 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2922 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
2925 /* handle link resume & hotplug spinup */
2926 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
2927 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
2928 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2930 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
2931 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
2932 ata_wait_spinup(ap
);
2934 /* if we're about to do hardreset, nothing more to do */
2935 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
2938 /* if SATA, resume phy */
2939 if (ap
->cbl
== ATA_CBL_SATA
) {
2940 rc
= sata_phy_resume(ap
, timing
);
2941 if (rc
&& rc
!= -EOPNOTSUPP
) {
2942 /* phy resume failed */
2943 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
2944 "link for reset (errno=%d)\n", rc
);
2949 /* Wait for !BSY if the controller can wait for the first D2H
2950 * Reg FIS and we don't know that no device is attached.
2952 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
2953 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2959 * ata_std_softreset - reset host port via ATA SRST
2960 * @ap: port to reset
2961 * @classes: resulting classes of attached devices
2963 * Reset host port using ATA SRST.
2966 * Kernel thread context (may sleep)
2969 * 0 on success, -errno otherwise.
2971 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2973 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2974 unsigned int devmask
= 0, err_mask
;
2979 if (ata_port_offline(ap
)) {
2980 classes
[0] = ATA_DEV_NONE
;
2984 /* determine if device 0/1 are present */
2985 if (ata_devchk(ap
, 0))
2986 devmask
|= (1 << 0);
2987 if (slave_possible
&& ata_devchk(ap
, 1))
2988 devmask
|= (1 << 1);
2990 /* select device 0 again */
2991 ap
->ops
->dev_select(ap
, 0);
2993 /* issue bus reset */
2994 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2995 err_mask
= ata_bus_softreset(ap
, devmask
);
2997 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
3002 /* determine by signature whether we have ATA or ATAPI devices */
3003 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3004 if (slave_possible
&& err
!= 0x81)
3005 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3008 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3013 * sata_port_hardreset - reset port via SATA phy reset
3014 * @ap: port to reset
3015 * @timing: timing parameters { interval, duratinon, timeout } in msec
3017 * SATA phy-reset host port using DET bits of SControl register.
3020 * Kernel thread context (may sleep)
3023 * 0 on success, -errno otherwise.
3025 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
3032 if (sata_set_spd_needed(ap
)) {
3033 /* SATA spec says nothing about how to reconfigure
3034 * spd. To be on the safe side, turn off phy during
3035 * reconfiguration. This works for at least ICH7 AHCI
3038 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3041 scontrol
= (scontrol
& 0x0f0) | 0x304;
3043 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3049 /* issue phy wake/reset */
3050 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3053 scontrol
= (scontrol
& 0x0f0) | 0x301;
3055 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3058 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3059 * 10.4.2 says at least 1 ms.
3063 /* bring phy back */
3064 rc
= sata_phy_resume(ap
, timing
);
3066 DPRINTK("EXIT, rc=%d\n", rc
);
3071 * sata_std_hardreset - reset host port via SATA phy reset
3072 * @ap: port to reset
3073 * @class: resulting class of attached device
3075 * SATA phy-reset host port using DET bits of SControl register,
3076 * wait for !BSY and classify the attached device.
3079 * Kernel thread context (may sleep)
3082 * 0 on success, -errno otherwise.
3084 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
3086 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3092 rc
= sata_port_hardreset(ap
, timing
);
3094 ata_port_printk(ap
, KERN_ERR
,
3095 "COMRESET failed (errno=%d)\n", rc
);
3099 /* TODO: phy layer with polling, timeouts, etc. */
3100 if (ata_port_offline(ap
)) {
3101 *class = ATA_DEV_NONE
;
3102 DPRINTK("EXIT, link offline\n");
3106 /* wait a while before checking status, see SRST for more info */
3109 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
3110 ata_port_printk(ap
, KERN_ERR
,
3111 "COMRESET failed (device not ready)\n");
3115 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3117 *class = ata_dev_try_classify(ap
, 0, NULL
);
3119 DPRINTK("EXIT, class=%u\n", *class);
3124 * ata_std_postreset - standard postreset callback
3125 * @ap: the target ata_port
3126 * @classes: classes of attached devices
3128 * This function is invoked after a successful reset. Note that
3129 * the device might have been reset more than once using
3130 * different reset methods before postreset is invoked.
3133 * Kernel thread context (may sleep)
3135 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3141 /* print link status */
3142 sata_print_link_status(ap
);
3145 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3146 sata_scr_write(ap
, SCR_ERROR
, serror
);
3148 /* re-enable interrupts */
3149 if (!ap
->ops
->error_handler
)
3150 ap
->ops
->irq_on(ap
);
3152 /* is double-select really necessary? */
3153 if (classes
[0] != ATA_DEV_NONE
)
3154 ap
->ops
->dev_select(ap
, 1);
3155 if (classes
[1] != ATA_DEV_NONE
)
3156 ap
->ops
->dev_select(ap
, 0);
3158 /* bail out if no device is present */
3159 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3160 DPRINTK("EXIT, no device\n");
3164 /* set up device control */
3165 if (ap
->ioaddr
.ctl_addr
)
3166 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3172 * ata_dev_same_device - Determine whether new ID matches configured device
3173 * @dev: device to compare against
3174 * @new_class: class of the new device
3175 * @new_id: IDENTIFY page of the new device
3177 * Compare @new_class and @new_id against @dev and determine
3178 * whether @dev is the device indicated by @new_class and
3185 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3187 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3190 const u16
*old_id
= dev
->id
;
3191 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3192 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3195 if (dev
->class != new_class
) {
3196 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3197 dev
->class, new_class
);
3201 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3202 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3203 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3204 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3205 new_n_sectors
= ata_id_n_sectors(new_id
);
3207 if (strcmp(model
[0], model
[1])) {
3208 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3209 "'%s' != '%s'\n", model
[0], model
[1]);
3213 if (strcmp(serial
[0], serial
[1])) {
3214 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3215 "'%s' != '%s'\n", serial
[0], serial
[1]);
3219 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3220 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3222 (unsigned long long)dev
->n_sectors
,
3223 (unsigned long long)new_n_sectors
);
3231 * ata_dev_revalidate - Revalidate ATA device
3232 * @dev: device to revalidate
3233 * @readid_flags: read ID flags
3235 * Re-read IDENTIFY page and make sure @dev is still attached to
3239 * Kernel thread context (may sleep)
3242 * 0 on success, negative errno otherwise
3244 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3246 unsigned int class = dev
->class;
3247 u16
*id
= (void *)dev
->ap
->sector_buf
;
3250 if (!ata_dev_enabled(dev
)) {
3256 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3260 /* is the device still there? */
3261 if (!ata_dev_same_device(dev
, class, id
)) {
3266 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3268 /* configure device according to the new ID */
3269 rc
= ata_dev_configure(dev
);
3274 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3278 struct ata_blacklist_entry
{
3279 const char *model_num
;
3280 const char *model_rev
;
3281 unsigned long horkage
;
3284 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3285 /* Devices with DMA related problems under Linux */
3286 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3287 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3288 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3289 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3290 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3291 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3292 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3293 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3294 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3295 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3296 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3297 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3298 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3299 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3300 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3301 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3302 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3303 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3304 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3305 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3306 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3307 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3308 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3309 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3310 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3311 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3312 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3313 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3314 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3315 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3317 /* Devices we expect to fail diagnostics */
3319 /* Devices where NCQ should be avoided */
3321 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3323 /* Devices with NCQ limits */
3329 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3331 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3332 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3333 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3335 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3336 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3338 while (ad
->model_num
) {
3339 if (!strcmp(ad
->model_num
, model_num
)) {
3340 if (ad
->model_rev
== NULL
)
3342 if (!strcmp(ad
->model_rev
, model_rev
))
3350 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3352 /* We don't support polling DMA.
3353 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3354 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3356 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3357 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3359 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3363 * ata_dev_xfermask - Compute supported xfermask of the given device
3364 * @dev: Device to compute xfermask for
3366 * Compute supported xfermask of @dev and store it in
3367 * dev->*_mask. This function is responsible for applying all
3368 * known limits including host controller limits, device
3374 static void ata_dev_xfermask(struct ata_device
*dev
)
3376 struct ata_port
*ap
= dev
->ap
;
3377 struct ata_host
*host
= ap
->host
;
3378 unsigned long xfer_mask
;
3380 /* controller modes available */
3381 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3382 ap
->mwdma_mask
, ap
->udma_mask
);
3384 /* Apply cable rule here. Don't apply it early because when
3385 * we handle hot plug the cable type can itself change.
3387 if (ap
->cbl
== ATA_CBL_PATA40
)
3388 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3389 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3390 * host side are checked drive side as well. Cases where we know a
3391 * 40wire cable is used safely for 80 are not checked here.
3393 if (ata_drive_40wire(dev
->id
) && (ap
->cbl
== ATA_CBL_PATA_UNK
|| ap
->cbl
== ATA_CBL_PATA80
))
3394 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3397 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3398 dev
->mwdma_mask
, dev
->udma_mask
);
3399 xfer_mask
&= ata_id_xfermask(dev
->id
);
3402 * CFA Advanced TrueIDE timings are not allowed on a shared
3405 if (ata_dev_pair(dev
)) {
3406 /* No PIO5 or PIO6 */
3407 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3408 /* No MWDMA3 or MWDMA 4 */
3409 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3412 if (ata_dma_blacklisted(dev
)) {
3413 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3414 ata_dev_printk(dev
, KERN_WARNING
,
3415 "device is on DMA blacklist, disabling DMA\n");
3418 if ((host
->flags
& ATA_HOST_SIMPLEX
) && host
->simplex_claimed
) {
3419 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3420 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3421 "other device, disabling DMA\n");
3424 if (ap
->ops
->mode_filter
)
3425 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3427 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3428 &dev
->mwdma_mask
, &dev
->udma_mask
);
3432 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3433 * @dev: Device to which command will be sent
3435 * Issue SET FEATURES - XFER MODE command to device @dev
3439 * PCI/etc. bus probe sem.
3442 * 0 on success, AC_ERR_* mask otherwise.
3445 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3447 struct ata_taskfile tf
;
3448 unsigned int err_mask
;
3450 /* set up set-features taskfile */
3451 DPRINTK("set features - xfer mode\n");
3453 ata_tf_init(dev
, &tf
);
3454 tf
.command
= ATA_CMD_SET_FEATURES
;
3455 tf
.feature
= SETFEATURES_XFER
;
3456 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3457 tf
.protocol
= ATA_PROT_NODATA
;
3458 tf
.nsect
= dev
->xfer_mode
;
3460 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3462 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3467 * ata_dev_init_params - Issue INIT DEV PARAMS command
3468 * @dev: Device to which command will be sent
3469 * @heads: Number of heads (taskfile parameter)
3470 * @sectors: Number of sectors (taskfile parameter)
3473 * Kernel thread context (may sleep)
3476 * 0 on success, AC_ERR_* mask otherwise.
3478 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3479 u16 heads
, u16 sectors
)
3481 struct ata_taskfile tf
;
3482 unsigned int err_mask
;
3484 /* Number of sectors per track 1-255. Number of heads 1-16 */
3485 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3486 return AC_ERR_INVALID
;
3488 /* set up init dev params taskfile */
3489 DPRINTK("init dev params \n");
3491 ata_tf_init(dev
, &tf
);
3492 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3493 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3494 tf
.protocol
= ATA_PROT_NODATA
;
3496 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3498 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3500 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3505 * ata_sg_clean - Unmap DMA memory associated with command
3506 * @qc: Command containing DMA memory to be released
3508 * Unmap all mapped DMA memory associated with this command.
3511 * spin_lock_irqsave(host lock)
3513 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3515 struct ata_port
*ap
= qc
->ap
;
3516 struct scatterlist
*sg
= qc
->__sg
;
3517 int dir
= qc
->dma_dir
;
3518 void *pad_buf
= NULL
;
3520 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3521 WARN_ON(sg
== NULL
);
3523 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3524 WARN_ON(qc
->n_elem
> 1);
3526 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3528 /* if we padded the buffer out to 32-bit bound, and data
3529 * xfer direction is from-device, we must copy from the
3530 * pad buffer back into the supplied buffer
3532 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3533 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3535 if (qc
->flags
& ATA_QCFLAG_SG
) {
3537 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3538 /* restore last sg */
3539 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3541 struct scatterlist
*psg
= &qc
->pad_sgent
;
3542 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3543 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3544 kunmap_atomic(addr
, KM_IRQ0
);
3548 dma_unmap_single(ap
->dev
,
3549 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3552 sg
->length
+= qc
->pad_len
;
3554 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3555 pad_buf
, qc
->pad_len
);
3558 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3563 * ata_fill_sg - Fill PCI IDE PRD table
3564 * @qc: Metadata associated with taskfile to be transferred
3566 * Fill PCI IDE PRD (scatter-gather) table with segments
3567 * associated with the current disk command.
3570 * spin_lock_irqsave(host lock)
3573 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3575 struct ata_port
*ap
= qc
->ap
;
3576 struct scatterlist
*sg
;
3579 WARN_ON(qc
->__sg
== NULL
);
3580 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3583 ata_for_each_sg(sg
, qc
) {
3587 /* determine if physical DMA addr spans 64K boundary.
3588 * Note h/w doesn't support 64-bit, so we unconditionally
3589 * truncate dma_addr_t to u32.
3591 addr
= (u32
) sg_dma_address(sg
);
3592 sg_len
= sg_dma_len(sg
);
3595 offset
= addr
& 0xffff;
3597 if ((offset
+ sg_len
) > 0x10000)
3598 len
= 0x10000 - offset
;
3600 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3601 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3602 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3611 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3614 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3615 * @qc: Metadata associated with taskfile to check
3617 * Allow low-level driver to filter ATA PACKET commands, returning
3618 * a status indicating whether or not it is OK to use DMA for the
3619 * supplied PACKET command.
3622 * spin_lock_irqsave(host lock)
3624 * RETURNS: 0 when ATAPI DMA can be used
3627 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3629 struct ata_port
*ap
= qc
->ap
;
3630 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3632 if (ap
->ops
->check_atapi_dma
)
3633 rc
= ap
->ops
->check_atapi_dma(qc
);
3638 * ata_qc_prep - Prepare taskfile for submission
3639 * @qc: Metadata associated with taskfile to be prepared
3641 * Prepare ATA taskfile for submission.
3644 * spin_lock_irqsave(host lock)
3646 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3648 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3654 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3657 * ata_sg_init_one - Associate command with memory buffer
3658 * @qc: Command to be associated
3659 * @buf: Memory buffer
3660 * @buflen: Length of memory buffer, in bytes.
3662 * Initialize the data-related elements of queued_cmd @qc
3663 * to point to a single memory buffer, @buf of byte length @buflen.
3666 * spin_lock_irqsave(host lock)
3669 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3671 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3673 qc
->__sg
= &qc
->sgent
;
3675 qc
->orig_n_elem
= 1;
3677 qc
->nbytes
= buflen
;
3679 sg_init_one(&qc
->sgent
, buf
, buflen
);
3683 * ata_sg_init - Associate command with scatter-gather table.
3684 * @qc: Command to be associated
3685 * @sg: Scatter-gather table.
3686 * @n_elem: Number of elements in s/g table.
3688 * Initialize the data-related elements of queued_cmd @qc
3689 * to point to a scatter-gather table @sg, containing @n_elem
3693 * spin_lock_irqsave(host lock)
3696 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3697 unsigned int n_elem
)
3699 qc
->flags
|= ATA_QCFLAG_SG
;
3701 qc
->n_elem
= n_elem
;
3702 qc
->orig_n_elem
= n_elem
;
3706 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3707 * @qc: Command with memory buffer to be mapped.
3709 * DMA-map the memory buffer associated with queued_cmd @qc.
3712 * spin_lock_irqsave(host lock)
3715 * Zero on success, negative on error.
3718 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3720 struct ata_port
*ap
= qc
->ap
;
3721 int dir
= qc
->dma_dir
;
3722 struct scatterlist
*sg
= qc
->__sg
;
3723 dma_addr_t dma_address
;
3726 /* we must lengthen transfers to end on a 32-bit boundary */
3727 qc
->pad_len
= sg
->length
& 3;
3729 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3730 struct scatterlist
*psg
= &qc
->pad_sgent
;
3732 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3734 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3736 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3737 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3740 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3741 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3743 sg
->length
-= qc
->pad_len
;
3744 if (sg
->length
== 0)
3747 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3748 sg
->length
, qc
->pad_len
);
3756 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3758 if (dma_mapping_error(dma_address
)) {
3760 sg
->length
+= qc
->pad_len
;
3764 sg_dma_address(sg
) = dma_address
;
3765 sg_dma_len(sg
) = sg
->length
;
3768 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3769 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3775 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3776 * @qc: Command with scatter-gather table to be mapped.
3778 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3781 * spin_lock_irqsave(host lock)
3784 * Zero on success, negative on error.
3788 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3790 struct ata_port
*ap
= qc
->ap
;
3791 struct scatterlist
*sg
= qc
->__sg
;
3792 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3793 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3795 VPRINTK("ENTER, ata%u\n", ap
->id
);
3796 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3798 /* we must lengthen transfers to end on a 32-bit boundary */
3799 qc
->pad_len
= lsg
->length
& 3;
3801 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3802 struct scatterlist
*psg
= &qc
->pad_sgent
;
3803 unsigned int offset
;
3805 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3807 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3810 * psg->page/offset are used to copy to-be-written
3811 * data in this function or read data in ata_sg_clean.
3813 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3814 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3815 psg
->offset
= offset_in_page(offset
);
3817 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3818 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3819 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3820 kunmap_atomic(addr
, KM_IRQ0
);
3823 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3824 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3826 lsg
->length
-= qc
->pad_len
;
3827 if (lsg
->length
== 0)
3830 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3831 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3834 pre_n_elem
= qc
->n_elem
;
3835 if (trim_sg
&& pre_n_elem
)
3844 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3846 /* restore last sg */
3847 lsg
->length
+= qc
->pad_len
;
3851 DPRINTK("%d sg elements mapped\n", n_elem
);
3854 qc
->n_elem
= n_elem
;
3860 * swap_buf_le16 - swap halves of 16-bit words in place
3861 * @buf: Buffer to swap
3862 * @buf_words: Number of 16-bit words in buffer.
3864 * Swap halves of 16-bit words if needed to convert from
3865 * little-endian byte order to native cpu byte order, or
3869 * Inherited from caller.
3871 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3876 for (i
= 0; i
< buf_words
; i
++)
3877 buf
[i
] = le16_to_cpu(buf
[i
]);
3878 #endif /* __BIG_ENDIAN */
3882 * ata_data_xfer - Transfer data by PIO
3883 * @adev: device to target
3885 * @buflen: buffer length
3886 * @write_data: read/write
3888 * Transfer data from/to the device data register by PIO.
3891 * Inherited from caller.
3893 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3894 unsigned int buflen
, int write_data
)
3896 struct ata_port
*ap
= adev
->ap
;
3897 unsigned int words
= buflen
>> 1;
3899 /* Transfer multiple of 2 bytes */
3901 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3903 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3905 /* Transfer trailing 1 byte, if any. */
3906 if (unlikely(buflen
& 0x01)) {
3907 u16 align_buf
[1] = { 0 };
3908 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3911 memcpy(align_buf
, trailing_buf
, 1);
3912 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3914 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
3915 memcpy(trailing_buf
, align_buf
, 1);
3921 * ata_data_xfer_noirq - Transfer data by PIO
3922 * @adev: device to target
3924 * @buflen: buffer length
3925 * @write_data: read/write
3927 * Transfer data from/to the device data register by PIO. Do the
3928 * transfer with interrupts disabled.
3931 * Inherited from caller.
3933 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
3934 unsigned int buflen
, int write_data
)
3936 unsigned long flags
;
3937 local_irq_save(flags
);
3938 ata_data_xfer(adev
, buf
, buflen
, write_data
);
3939 local_irq_restore(flags
);
3944 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3945 * @qc: Command on going
3947 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3950 * Inherited from caller.
3953 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3955 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3956 struct scatterlist
*sg
= qc
->__sg
;
3957 struct ata_port
*ap
= qc
->ap
;
3959 unsigned int offset
;
3962 if (qc
->curbytes
== qc
->nbytes
- ATA_SECT_SIZE
)
3963 ap
->hsm_task_state
= HSM_ST_LAST
;
3965 page
= sg
[qc
->cursg
].page
;
3966 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
3968 /* get the current page and offset */
3969 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3970 offset
%= PAGE_SIZE
;
3972 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3974 if (PageHighMem(page
)) {
3975 unsigned long flags
;
3977 /* FIXME: use a bounce buffer */
3978 local_irq_save(flags
);
3979 buf
= kmap_atomic(page
, KM_IRQ0
);
3981 /* do the actual data transfer */
3982 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3984 kunmap_atomic(buf
, KM_IRQ0
);
3985 local_irq_restore(flags
);
3987 buf
= page_address(page
);
3988 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3991 qc
->curbytes
+= ATA_SECT_SIZE
;
3992 qc
->cursg_ofs
+= ATA_SECT_SIZE
;
3994 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4001 * ata_pio_sectors - Transfer one or many 512-byte sectors.
4002 * @qc: Command on going
4004 * Transfer one or many ATA_SECT_SIZE of data from/to the
4005 * ATA device for the DRQ request.
4008 * Inherited from caller.
4011 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4013 if (is_multi_taskfile(&qc
->tf
)) {
4014 /* READ/WRITE MULTIPLE */
4017 WARN_ON(qc
->dev
->multi_count
== 0);
4019 nsect
= min((qc
->nbytes
- qc
->curbytes
) / ATA_SECT_SIZE
,
4020 qc
->dev
->multi_count
);
4028 * atapi_send_cdb - Write CDB bytes to hardware
4029 * @ap: Port to which ATAPI device is attached.
4030 * @qc: Taskfile currently active
4032 * When device has indicated its readiness to accept
4033 * a CDB, this function is called. Send the CDB.
4039 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4042 DPRINTK("send cdb\n");
4043 WARN_ON(qc
->dev
->cdb_len
< 12);
4045 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4046 ata_altstatus(ap
); /* flush */
4048 switch (qc
->tf
.protocol
) {
4049 case ATA_PROT_ATAPI
:
4050 ap
->hsm_task_state
= HSM_ST
;
4052 case ATA_PROT_ATAPI_NODATA
:
4053 ap
->hsm_task_state
= HSM_ST_LAST
;
4055 case ATA_PROT_ATAPI_DMA
:
4056 ap
->hsm_task_state
= HSM_ST_LAST
;
4057 /* initiate bmdma */
4058 ap
->ops
->bmdma_start(qc
);
4064 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4065 * @qc: Command on going
4066 * @bytes: number of bytes
4068 * Transfer Transfer data from/to the ATAPI device.
4071 * Inherited from caller.
4075 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4077 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4078 struct scatterlist
*sg
= qc
->__sg
;
4079 struct ata_port
*ap
= qc
->ap
;
4082 unsigned int offset
, count
;
4084 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4085 ap
->hsm_task_state
= HSM_ST_LAST
;
4088 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4090 * The end of qc->sg is reached and the device expects
4091 * more data to transfer. In order not to overrun qc->sg
4092 * and fulfill length specified in the byte count register,
4093 * - for read case, discard trailing data from the device
4094 * - for write case, padding zero data to the device
4096 u16 pad_buf
[1] = { 0 };
4097 unsigned int words
= bytes
>> 1;
4100 if (words
) /* warning if bytes > 1 */
4101 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4102 "%u bytes trailing data\n", bytes
);
4104 for (i
= 0; i
< words
; i
++)
4105 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4107 ap
->hsm_task_state
= HSM_ST_LAST
;
4111 sg
= &qc
->__sg
[qc
->cursg
];
4114 offset
= sg
->offset
+ qc
->cursg_ofs
;
4116 /* get the current page and offset */
4117 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4118 offset
%= PAGE_SIZE
;
4120 /* don't overrun current sg */
4121 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4123 /* don't cross page boundaries */
4124 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4126 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4128 if (PageHighMem(page
)) {
4129 unsigned long flags
;
4131 /* FIXME: use bounce buffer */
4132 local_irq_save(flags
);
4133 buf
= kmap_atomic(page
, KM_IRQ0
);
4135 /* do the actual data transfer */
4136 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4138 kunmap_atomic(buf
, KM_IRQ0
);
4139 local_irq_restore(flags
);
4141 buf
= page_address(page
);
4142 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4146 qc
->curbytes
+= count
;
4147 qc
->cursg_ofs
+= count
;
4149 if (qc
->cursg_ofs
== sg
->length
) {
4159 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4160 * @qc: Command on going
4162 * Transfer Transfer data from/to the ATAPI device.
4165 * Inherited from caller.
4168 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4170 struct ata_port
*ap
= qc
->ap
;
4171 struct ata_device
*dev
= qc
->dev
;
4172 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4173 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4175 /* Abuse qc->result_tf for temp storage of intermediate TF
4176 * here to save some kernel stack usage.
4177 * For normal completion, qc->result_tf is not relevant. For
4178 * error, qc->result_tf is later overwritten by ata_qc_complete().
4179 * So, the correctness of qc->result_tf is not affected.
4181 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4182 ireason
= qc
->result_tf
.nsect
;
4183 bc_lo
= qc
->result_tf
.lbam
;
4184 bc_hi
= qc
->result_tf
.lbah
;
4185 bytes
= (bc_hi
<< 8) | bc_lo
;
4187 /* shall be cleared to zero, indicating xfer of data */
4188 if (ireason
& (1 << 0))
4191 /* make sure transfer direction matches expected */
4192 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4193 if (do_write
!= i_write
)
4196 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
4198 __atapi_pio_bytes(qc
, bytes
);
4203 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4204 qc
->err_mask
|= AC_ERR_HSM
;
4205 ap
->hsm_task_state
= HSM_ST_ERR
;
4209 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4210 * @ap: the target ata_port
4214 * 1 if ok in workqueue, 0 otherwise.
4217 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4219 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4222 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4223 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4224 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4227 if (is_atapi_taskfile(&qc
->tf
) &&
4228 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4236 * ata_hsm_qc_complete - finish a qc running on standard HSM
4237 * @qc: Command to complete
4238 * @in_wq: 1 if called from workqueue, 0 otherwise
4240 * Finish @qc which is running on standard HSM.
4243 * If @in_wq is zero, spin_lock_irqsave(host lock).
4244 * Otherwise, none on entry and grabs host lock.
4246 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4248 struct ata_port
*ap
= qc
->ap
;
4249 unsigned long flags
;
4251 if (ap
->ops
->error_handler
) {
4253 spin_lock_irqsave(ap
->lock
, flags
);
4255 /* EH might have kicked in while host lock is
4258 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4260 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4261 ap
->ops
->irq_on(ap
);
4262 ata_qc_complete(qc
);
4264 ata_port_freeze(ap
);
4267 spin_unlock_irqrestore(ap
->lock
, flags
);
4269 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4270 ata_qc_complete(qc
);
4272 ata_port_freeze(ap
);
4276 spin_lock_irqsave(ap
->lock
, flags
);
4277 ap
->ops
->irq_on(ap
);
4278 ata_qc_complete(qc
);
4279 spin_unlock_irqrestore(ap
->lock
, flags
);
4281 ata_qc_complete(qc
);
4284 ata_altstatus(ap
); /* flush */
4288 * ata_hsm_move - move the HSM to the next state.
4289 * @ap: the target ata_port
4291 * @status: current device status
4292 * @in_wq: 1 if called from workqueue, 0 otherwise
4295 * 1 when poll next status needed, 0 otherwise.
4297 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4298 u8 status
, int in_wq
)
4300 unsigned long flags
= 0;
4303 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4305 /* Make sure ata_qc_issue_prot() does not throw things
4306 * like DMA polling into the workqueue. Notice that
4307 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4309 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4312 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4313 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4315 switch (ap
->hsm_task_state
) {
4317 /* Send first data block or PACKET CDB */
4319 /* If polling, we will stay in the work queue after
4320 * sending the data. Otherwise, interrupt handler
4321 * takes over after sending the data.
4323 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4325 /* check device status */
4326 if (unlikely((status
& ATA_DRQ
) == 0)) {
4327 /* handle BSY=0, DRQ=0 as error */
4328 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4329 /* device stops HSM for abort/error */
4330 qc
->err_mask
|= AC_ERR_DEV
;
4332 /* HSM violation. Let EH handle this */
4333 qc
->err_mask
|= AC_ERR_HSM
;
4335 ap
->hsm_task_state
= HSM_ST_ERR
;
4339 /* Device should not ask for data transfer (DRQ=1)
4340 * when it finds something wrong.
4341 * We ignore DRQ here and stop the HSM by
4342 * changing hsm_task_state to HSM_ST_ERR and
4343 * let the EH abort the command or reset the device.
4345 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4346 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4348 qc
->err_mask
|= AC_ERR_HSM
;
4349 ap
->hsm_task_state
= HSM_ST_ERR
;
4353 /* Send the CDB (atapi) or the first data block (ata pio out).
4354 * During the state transition, interrupt handler shouldn't
4355 * be invoked before the data transfer is complete and
4356 * hsm_task_state is changed. Hence, the following locking.
4359 spin_lock_irqsave(ap
->lock
, flags
);
4361 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4362 /* PIO data out protocol.
4363 * send first data block.
4366 /* ata_pio_sectors() might change the state
4367 * to HSM_ST_LAST. so, the state is changed here
4368 * before ata_pio_sectors().
4370 ap
->hsm_task_state
= HSM_ST
;
4371 ata_pio_sectors(qc
);
4372 ata_altstatus(ap
); /* flush */
4375 atapi_send_cdb(ap
, qc
);
4378 spin_unlock_irqrestore(ap
->lock
, flags
);
4380 /* if polling, ata_pio_task() handles the rest.
4381 * otherwise, interrupt handler takes over from here.
4386 /* complete command or read/write the data register */
4387 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4388 /* ATAPI PIO protocol */
4389 if ((status
& ATA_DRQ
) == 0) {
4390 /* No more data to transfer or device error.
4391 * Device error will be tagged in HSM_ST_LAST.
4393 ap
->hsm_task_state
= HSM_ST_LAST
;
4397 /* Device should not ask for data transfer (DRQ=1)
4398 * when it finds something wrong.
4399 * We ignore DRQ here and stop the HSM by
4400 * changing hsm_task_state to HSM_ST_ERR and
4401 * let the EH abort the command or reset the device.
4403 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4404 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4406 qc
->err_mask
|= AC_ERR_HSM
;
4407 ap
->hsm_task_state
= HSM_ST_ERR
;
4411 atapi_pio_bytes(qc
);
4413 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4414 /* bad ireason reported by device */
4418 /* ATA PIO protocol */
4419 if (unlikely((status
& ATA_DRQ
) == 0)) {
4420 /* handle BSY=0, DRQ=0 as error */
4421 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4422 /* device stops HSM for abort/error */
4423 qc
->err_mask
|= AC_ERR_DEV
;
4425 /* HSM violation. Let EH handle this.
4426 * Phantom devices also trigger this
4427 * condition. Mark hint.
4429 qc
->err_mask
|= AC_ERR_HSM
|
4432 ap
->hsm_task_state
= HSM_ST_ERR
;
4436 /* For PIO reads, some devices may ask for
4437 * data transfer (DRQ=1) alone with ERR=1.
4438 * We respect DRQ here and transfer one
4439 * block of junk data before changing the
4440 * hsm_task_state to HSM_ST_ERR.
4442 * For PIO writes, ERR=1 DRQ=1 doesn't make
4443 * sense since the data block has been
4444 * transferred to the device.
4446 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4447 /* data might be corrputed */
4448 qc
->err_mask
|= AC_ERR_DEV
;
4450 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4451 ata_pio_sectors(qc
);
4453 status
= ata_wait_idle(ap
);
4456 if (status
& (ATA_BUSY
| ATA_DRQ
))
4457 qc
->err_mask
|= AC_ERR_HSM
;
4459 /* ata_pio_sectors() might change the
4460 * state to HSM_ST_LAST. so, the state
4461 * is changed after ata_pio_sectors().
4463 ap
->hsm_task_state
= HSM_ST_ERR
;
4467 ata_pio_sectors(qc
);
4469 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4470 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4473 status
= ata_wait_idle(ap
);
4478 ata_altstatus(ap
); /* flush */
4483 if (unlikely(!ata_ok(status
))) {
4484 qc
->err_mask
|= __ac_err_mask(status
);
4485 ap
->hsm_task_state
= HSM_ST_ERR
;
4489 /* no more data to transfer */
4490 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4491 ap
->id
, qc
->dev
->devno
, status
);
4493 WARN_ON(qc
->err_mask
);
4495 ap
->hsm_task_state
= HSM_ST_IDLE
;
4497 /* complete taskfile transaction */
4498 ata_hsm_qc_complete(qc
, in_wq
);
4504 /* make sure qc->err_mask is available to
4505 * know what's wrong and recover
4507 WARN_ON(qc
->err_mask
== 0);
4509 ap
->hsm_task_state
= HSM_ST_IDLE
;
4511 /* complete taskfile transaction */
4512 ata_hsm_qc_complete(qc
, in_wq
);
4524 static void ata_pio_task(struct work_struct
*work
)
4526 struct ata_port
*ap
=
4527 container_of(work
, struct ata_port
, port_task
.work
);
4528 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
4533 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4536 * This is purely heuristic. This is a fast path.
4537 * Sometimes when we enter, BSY will be cleared in
4538 * a chk-status or two. If not, the drive is probably seeking
4539 * or something. Snooze for a couple msecs, then
4540 * chk-status again. If still busy, queue delayed work.
4542 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4543 if (status
& ATA_BUSY
) {
4545 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4546 if (status
& ATA_BUSY
) {
4547 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4553 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4555 /* another command or interrupt handler
4556 * may be running at this point.
4563 * ata_qc_new - Request an available ATA command, for queueing
4564 * @ap: Port associated with device @dev
4565 * @dev: Device from whom we request an available command structure
4571 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4573 struct ata_queued_cmd
*qc
= NULL
;
4576 /* no command while frozen */
4577 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4580 /* the last tag is reserved for internal command. */
4581 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4582 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4583 qc
= __ata_qc_from_tag(ap
, i
);
4594 * ata_qc_new_init - Request an available ATA command, and initialize it
4595 * @dev: Device from whom we request an available command structure
4601 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4603 struct ata_port
*ap
= dev
->ap
;
4604 struct ata_queued_cmd
*qc
;
4606 qc
= ata_qc_new(ap
);
4619 * ata_qc_free - free unused ata_queued_cmd
4620 * @qc: Command to complete
4622 * Designed to free unused ata_queued_cmd object
4623 * in case something prevents using it.
4626 * spin_lock_irqsave(host lock)
4628 void ata_qc_free(struct ata_queued_cmd
*qc
)
4630 struct ata_port
*ap
= qc
->ap
;
4633 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4637 if (likely(ata_tag_valid(tag
))) {
4638 qc
->tag
= ATA_TAG_POISON
;
4639 clear_bit(tag
, &ap
->qc_allocated
);
4643 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4645 struct ata_port
*ap
= qc
->ap
;
4647 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4648 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4650 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4653 /* command should be marked inactive atomically with qc completion */
4654 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4655 ap
->sactive
&= ~(1 << qc
->tag
);
4657 ap
->active_tag
= ATA_TAG_POISON
;
4659 /* atapi: mark qc as inactive to prevent the interrupt handler
4660 * from completing the command twice later, before the error handler
4661 * is called. (when rc != 0 and atapi request sense is needed)
4663 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4664 ap
->qc_active
&= ~(1 << qc
->tag
);
4666 /* call completion callback */
4667 qc
->complete_fn(qc
);
4670 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4672 struct ata_port
*ap
= qc
->ap
;
4674 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4675 qc
->result_tf
.flags
= qc
->tf
.flags
;
4679 * ata_qc_complete - Complete an active ATA command
4680 * @qc: Command to complete
4681 * @err_mask: ATA Status register contents
4683 * Indicate to the mid and upper layers that an ATA
4684 * command has completed, with either an ok or not-ok status.
4687 * spin_lock_irqsave(host lock)
4689 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4691 struct ata_port
*ap
= qc
->ap
;
4693 /* XXX: New EH and old EH use different mechanisms to
4694 * synchronize EH with regular execution path.
4696 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4697 * Normal execution path is responsible for not accessing a
4698 * failed qc. libata core enforces the rule by returning NULL
4699 * from ata_qc_from_tag() for failed qcs.
4701 * Old EH depends on ata_qc_complete() nullifying completion
4702 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4703 * not synchronize with interrupt handler. Only PIO task is
4706 if (ap
->ops
->error_handler
) {
4707 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4709 if (unlikely(qc
->err_mask
))
4710 qc
->flags
|= ATA_QCFLAG_FAILED
;
4712 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4713 if (!ata_tag_internal(qc
->tag
)) {
4714 /* always fill result TF for failed qc */
4716 ata_qc_schedule_eh(qc
);
4721 /* read result TF if requested */
4722 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4725 __ata_qc_complete(qc
);
4727 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4730 /* read result TF if failed or requested */
4731 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4734 __ata_qc_complete(qc
);
4739 * ata_qc_complete_multiple - Complete multiple qcs successfully
4740 * @ap: port in question
4741 * @qc_active: new qc_active mask
4742 * @finish_qc: LLDD callback invoked before completing a qc
4744 * Complete in-flight commands. This functions is meant to be
4745 * called from low-level driver's interrupt routine to complete
4746 * requests normally. ap->qc_active and @qc_active is compared
4747 * and commands are completed accordingly.
4750 * spin_lock_irqsave(host lock)
4753 * Number of completed commands on success, -errno otherwise.
4755 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4756 void (*finish_qc
)(struct ata_queued_cmd
*))
4762 done_mask
= ap
->qc_active
^ qc_active
;
4764 if (unlikely(done_mask
& qc_active
)) {
4765 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4766 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4770 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4771 struct ata_queued_cmd
*qc
;
4773 if (!(done_mask
& (1 << i
)))
4776 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4779 ata_qc_complete(qc
);
4787 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4789 struct ata_port
*ap
= qc
->ap
;
4791 switch (qc
->tf
.protocol
) {
4794 case ATA_PROT_ATAPI_DMA
:
4797 case ATA_PROT_ATAPI
:
4799 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4812 * ata_qc_issue - issue taskfile to device
4813 * @qc: command to issue to device
4815 * Prepare an ATA command to submission to device.
4816 * This includes mapping the data into a DMA-able
4817 * area, filling in the S/G table, and finally
4818 * writing the taskfile to hardware, starting the command.
4821 * spin_lock_irqsave(host lock)
4823 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4825 struct ata_port
*ap
= qc
->ap
;
4827 /* Make sure only one non-NCQ command is outstanding. The
4828 * check is skipped for old EH because it reuses active qc to
4829 * request ATAPI sense.
4831 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4833 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4834 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4835 ap
->sactive
|= 1 << qc
->tag
;
4837 WARN_ON(ap
->sactive
);
4838 ap
->active_tag
= qc
->tag
;
4841 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4842 ap
->qc_active
|= 1 << qc
->tag
;
4844 if (ata_should_dma_map(qc
)) {
4845 if (qc
->flags
& ATA_QCFLAG_SG
) {
4846 if (ata_sg_setup(qc
))
4848 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4849 if (ata_sg_setup_one(qc
))
4853 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4856 ap
->ops
->qc_prep(qc
);
4858 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4859 if (unlikely(qc
->err_mask
))
4864 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4865 qc
->err_mask
|= AC_ERR_SYSTEM
;
4867 ata_qc_complete(qc
);
4871 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4872 * @qc: command to issue to device
4874 * Using various libata functions and hooks, this function
4875 * starts an ATA command. ATA commands are grouped into
4876 * classes called "protocols", and issuing each type of protocol
4877 * is slightly different.
4879 * May be used as the qc_issue() entry in ata_port_operations.
4882 * spin_lock_irqsave(host lock)
4885 * Zero on success, AC_ERR_* mask on failure
4888 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4890 struct ata_port
*ap
= qc
->ap
;
4892 /* Use polling pio if the LLD doesn't handle
4893 * interrupt driven pio and atapi CDB interrupt.
4895 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4896 switch (qc
->tf
.protocol
) {
4898 case ATA_PROT_NODATA
:
4899 case ATA_PROT_ATAPI
:
4900 case ATA_PROT_ATAPI_NODATA
:
4901 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4903 case ATA_PROT_ATAPI_DMA
:
4904 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4905 /* see ata_dma_blacklisted() */
4913 /* Some controllers show flaky interrupt behavior after
4914 * setting xfer mode. Use polling instead.
4916 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
4917 qc
->tf
.feature
== SETFEATURES_XFER
) &&
4918 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
4919 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4921 /* select the device */
4922 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4924 /* start the command */
4925 switch (qc
->tf
.protocol
) {
4926 case ATA_PROT_NODATA
:
4927 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4928 ata_qc_set_polling(qc
);
4930 ata_tf_to_host(ap
, &qc
->tf
);
4931 ap
->hsm_task_state
= HSM_ST_LAST
;
4933 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4934 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4939 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4941 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4942 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4943 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4944 ap
->hsm_task_state
= HSM_ST_LAST
;
4948 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4949 ata_qc_set_polling(qc
);
4951 ata_tf_to_host(ap
, &qc
->tf
);
4953 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4954 /* PIO data out protocol */
4955 ap
->hsm_task_state
= HSM_ST_FIRST
;
4956 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4958 /* always send first data block using
4959 * the ata_pio_task() codepath.
4962 /* PIO data in protocol */
4963 ap
->hsm_task_state
= HSM_ST
;
4965 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4966 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4968 /* if polling, ata_pio_task() handles the rest.
4969 * otherwise, interrupt handler takes over from here.
4975 case ATA_PROT_ATAPI
:
4976 case ATA_PROT_ATAPI_NODATA
:
4977 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4978 ata_qc_set_polling(qc
);
4980 ata_tf_to_host(ap
, &qc
->tf
);
4982 ap
->hsm_task_state
= HSM_ST_FIRST
;
4984 /* send cdb by polling if no cdb interrupt */
4985 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4986 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4987 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4990 case ATA_PROT_ATAPI_DMA
:
4991 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4993 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4994 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4995 ap
->hsm_task_state
= HSM_ST_FIRST
;
4997 /* send cdb by polling if no cdb interrupt */
4998 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4999 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5004 return AC_ERR_SYSTEM
;
5011 * ata_host_intr - Handle host interrupt for given (port, task)
5012 * @ap: Port on which interrupt arrived (possibly...)
5013 * @qc: Taskfile currently active in engine
5015 * Handle host interrupt for given queued command. Currently,
5016 * only DMA interrupts are handled. All other commands are
5017 * handled via polling with interrupts disabled (nIEN bit).
5020 * spin_lock_irqsave(host lock)
5023 * One if interrupt was handled, zero if not (shared irq).
5026 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5027 struct ata_queued_cmd
*qc
)
5029 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5030 u8 status
, host_stat
= 0;
5032 VPRINTK("ata%u: protocol %d task_state %d\n",
5033 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5035 /* Check whether we are expecting interrupt in this state */
5036 switch (ap
->hsm_task_state
) {
5038 /* Some pre-ATAPI-4 devices assert INTRQ
5039 * at this state when ready to receive CDB.
5042 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5043 * The flag was turned on only for atapi devices.
5044 * No need to check is_atapi_taskfile(&qc->tf) again.
5046 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5050 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5051 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5052 /* check status of DMA engine */
5053 host_stat
= ap
->ops
->bmdma_status(ap
);
5054 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
5056 /* if it's not our irq... */
5057 if (!(host_stat
& ATA_DMA_INTR
))
5060 /* before we do anything else, clear DMA-Start bit */
5061 ap
->ops
->bmdma_stop(qc
);
5063 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5064 /* error when transfering data to/from memory */
5065 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5066 ap
->hsm_task_state
= HSM_ST_ERR
;
5076 /* check altstatus */
5077 status
= ata_altstatus(ap
);
5078 if (status
& ATA_BUSY
)
5081 /* check main status, clearing INTRQ */
5082 status
= ata_chk_status(ap
);
5083 if (unlikely(status
& ATA_BUSY
))
5086 /* ack bmdma irq events */
5087 ap
->ops
->irq_clear(ap
);
5089 ata_hsm_move(ap
, qc
, status
, 0);
5091 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5092 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5093 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5095 return 1; /* irq handled */
5098 ap
->stats
.idle_irq
++;
5101 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5102 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5103 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5107 return 0; /* irq not handled */
5111 * ata_interrupt - Default ATA host interrupt handler
5112 * @irq: irq line (unused)
5113 * @dev_instance: pointer to our ata_host information structure
5115 * Default interrupt handler for PCI IDE devices. Calls
5116 * ata_host_intr() for each port that is not disabled.
5119 * Obtains host lock during operation.
5122 * IRQ_NONE or IRQ_HANDLED.
5125 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5127 struct ata_host
*host
= dev_instance
;
5129 unsigned int handled
= 0;
5130 unsigned long flags
;
5132 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5133 spin_lock_irqsave(&host
->lock
, flags
);
5135 for (i
= 0; i
< host
->n_ports
; i
++) {
5136 struct ata_port
*ap
;
5138 ap
= host
->ports
[i
];
5140 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5141 struct ata_queued_cmd
*qc
;
5143 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5144 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5145 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5146 handled
|= ata_host_intr(ap
, qc
);
5150 spin_unlock_irqrestore(&host
->lock
, flags
);
5152 return IRQ_RETVAL(handled
);
5156 * sata_scr_valid - test whether SCRs are accessible
5157 * @ap: ATA port to test SCR accessibility for
5159 * Test whether SCRs are accessible for @ap.
5165 * 1 if SCRs are accessible, 0 otherwise.
5167 int sata_scr_valid(struct ata_port
*ap
)
5169 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5173 * sata_scr_read - read SCR register of the specified port
5174 * @ap: ATA port to read SCR for
5176 * @val: Place to store read value
5178 * Read SCR register @reg of @ap into *@val. This function is
5179 * guaranteed to succeed if the cable type of the port is SATA
5180 * and the port implements ->scr_read.
5186 * 0 on success, negative errno on failure.
5188 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5190 if (sata_scr_valid(ap
)) {
5191 *val
= ap
->ops
->scr_read(ap
, reg
);
5198 * sata_scr_write - write SCR register of the specified port
5199 * @ap: ATA port to write SCR for
5200 * @reg: SCR to write
5201 * @val: value to write
5203 * Write @val to SCR register @reg of @ap. This function is
5204 * guaranteed to succeed if the cable type of the port is SATA
5205 * and the port implements ->scr_read.
5211 * 0 on success, negative errno on failure.
5213 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5215 if (sata_scr_valid(ap
)) {
5216 ap
->ops
->scr_write(ap
, reg
, val
);
5223 * sata_scr_write_flush - write SCR register of the specified port and flush
5224 * @ap: ATA port to write SCR for
5225 * @reg: SCR to write
5226 * @val: value to write
5228 * This function is identical to sata_scr_write() except that this
5229 * function performs flush after writing to the register.
5235 * 0 on success, negative errno on failure.
5237 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5239 if (sata_scr_valid(ap
)) {
5240 ap
->ops
->scr_write(ap
, reg
, val
);
5241 ap
->ops
->scr_read(ap
, reg
);
5248 * ata_port_online - test whether the given port is online
5249 * @ap: ATA port to test
5251 * Test whether @ap is online. Note that this function returns 0
5252 * if online status of @ap cannot be obtained, so
5253 * ata_port_online(ap) != !ata_port_offline(ap).
5259 * 1 if the port online status is available and online.
5261 int ata_port_online(struct ata_port
*ap
)
5265 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5271 * ata_port_offline - test whether the given port is offline
5272 * @ap: ATA port to test
5274 * Test whether @ap is offline. Note that this function returns
5275 * 0 if offline status of @ap cannot be obtained, so
5276 * ata_port_online(ap) != !ata_port_offline(ap).
5282 * 1 if the port offline status is available and offline.
5284 int ata_port_offline(struct ata_port
*ap
)
5288 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5293 int ata_flush_cache(struct ata_device
*dev
)
5295 unsigned int err_mask
;
5298 if (!ata_try_flush_cache(dev
))
5301 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5302 cmd
= ATA_CMD_FLUSH_EXT
;
5304 cmd
= ATA_CMD_FLUSH
;
5306 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5308 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5315 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5316 unsigned int action
, unsigned int ehi_flags
,
5319 unsigned long flags
;
5322 for (i
= 0; i
< host
->n_ports
; i
++) {
5323 struct ata_port
*ap
= host
->ports
[i
];
5325 /* Previous resume operation might still be in
5326 * progress. Wait for PM_PENDING to clear.
5328 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5329 ata_port_wait_eh(ap
);
5330 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5333 /* request PM ops to EH */
5334 spin_lock_irqsave(ap
->lock
, flags
);
5339 ap
->pm_result
= &rc
;
5342 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5343 ap
->eh_info
.action
|= action
;
5344 ap
->eh_info
.flags
|= ehi_flags
;
5346 ata_port_schedule_eh(ap
);
5348 spin_unlock_irqrestore(ap
->lock
, flags
);
5350 /* wait and check result */
5352 ata_port_wait_eh(ap
);
5353 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5363 * ata_host_suspend - suspend host
5364 * @host: host to suspend
5367 * Suspend @host. Actual operation is performed by EH. This
5368 * function requests EH to perform PM operations and waits for EH
5372 * Kernel thread context (may sleep).
5375 * 0 on success, -errno on failure.
5377 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5381 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5385 /* EH is quiescent now. Fail if we have any ready device.
5386 * This happens if hotplug occurs between completion of device
5387 * suspension and here.
5389 for (i
= 0; i
< host
->n_ports
; i
++) {
5390 struct ata_port
*ap
= host
->ports
[i
];
5392 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5393 struct ata_device
*dev
= &ap
->device
[j
];
5395 if (ata_dev_ready(dev
)) {
5396 ata_port_printk(ap
, KERN_WARNING
,
5397 "suspend failed, device %d "
5398 "still active\n", dev
->devno
);
5405 host
->dev
->power
.power_state
= mesg
;
5409 ata_host_resume(host
);
5414 * ata_host_resume - resume host
5415 * @host: host to resume
5417 * Resume @host. Actual operation is performed by EH. This
5418 * function requests EH to perform PM operations and returns.
5419 * Note that all resume operations are performed parallely.
5422 * Kernel thread context (may sleep).
5424 void ata_host_resume(struct ata_host
*host
)
5426 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5427 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5428 host
->dev
->power
.power_state
= PMSG_ON
;
5432 * ata_port_start - Set port up for dma.
5433 * @ap: Port to initialize
5435 * Called just after data structures for each port are
5436 * initialized. Allocates space for PRD table.
5438 * May be used as the port_start() entry in ata_port_operations.
5441 * Inherited from caller.
5443 int ata_port_start(struct ata_port
*ap
)
5445 struct device
*dev
= ap
->dev
;
5448 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5453 rc
= ata_pad_alloc(ap
, dev
);
5457 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5458 (unsigned long long)ap
->prd_dma
);
5463 * ata_dev_init - Initialize an ata_device structure
5464 * @dev: Device structure to initialize
5466 * Initialize @dev in preparation for probing.
5469 * Inherited from caller.
5471 void ata_dev_init(struct ata_device
*dev
)
5473 struct ata_port
*ap
= dev
->ap
;
5474 unsigned long flags
;
5476 /* SATA spd limit is bound to the first device */
5477 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5479 /* High bits of dev->flags are used to record warm plug
5480 * requests which occur asynchronously. Synchronize using
5483 spin_lock_irqsave(ap
->lock
, flags
);
5484 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5485 spin_unlock_irqrestore(ap
->lock
, flags
);
5487 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5488 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5489 dev
->pio_mask
= UINT_MAX
;
5490 dev
->mwdma_mask
= UINT_MAX
;
5491 dev
->udma_mask
= UINT_MAX
;
5495 * ata_port_init - Initialize an ata_port structure
5496 * @ap: Structure to initialize
5497 * @host: Collection of hosts to which @ap belongs
5498 * @ent: Probe information provided by low-level driver
5499 * @port_no: Port number associated with this ata_port
5501 * Initialize a new ata_port structure.
5504 * Inherited from caller.
5506 void ata_port_init(struct ata_port
*ap
, struct ata_host
*host
,
5507 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5511 ap
->lock
= &host
->lock
;
5512 ap
->flags
= ATA_FLAG_DISABLED
;
5513 ap
->id
= ata_unique_id
++;
5514 ap
->ctl
= ATA_DEVCTL_OBS
;
5517 ap
->port_no
= port_no
;
5518 if (port_no
== 1 && ent
->pinfo2
) {
5519 ap
->pio_mask
= ent
->pinfo2
->pio_mask
;
5520 ap
->mwdma_mask
= ent
->pinfo2
->mwdma_mask
;
5521 ap
->udma_mask
= ent
->pinfo2
->udma_mask
;
5522 ap
->flags
|= ent
->pinfo2
->flags
;
5523 ap
->ops
= ent
->pinfo2
->port_ops
;
5525 ap
->pio_mask
= ent
->pio_mask
;
5526 ap
->mwdma_mask
= ent
->mwdma_mask
;
5527 ap
->udma_mask
= ent
->udma_mask
;
5528 ap
->flags
|= ent
->port_flags
;
5529 ap
->ops
= ent
->port_ops
;
5531 ap
->hw_sata_spd_limit
= UINT_MAX
;
5532 ap
->active_tag
= ATA_TAG_POISON
;
5533 ap
->last_ctl
= 0xFF;
5535 #if defined(ATA_VERBOSE_DEBUG)
5536 /* turn on all debugging levels */
5537 ap
->msg_enable
= 0x00FF;
5538 #elif defined(ATA_DEBUG)
5539 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5541 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5544 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5545 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5546 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5547 INIT_LIST_HEAD(&ap
->eh_done_q
);
5548 init_waitqueue_head(&ap
->eh_wait_q
);
5550 /* set cable type */
5551 ap
->cbl
= ATA_CBL_NONE
;
5552 if (ap
->flags
& ATA_FLAG_SATA
)
5553 ap
->cbl
= ATA_CBL_SATA
;
5555 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5556 struct ata_device
*dev
= &ap
->device
[i
];
5563 ap
->stats
.unhandled_irq
= 1;
5564 ap
->stats
.idle_irq
= 1;
5567 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5571 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5572 * @ap: ATA port to initialize SCSI host for
5573 * @shost: SCSI host associated with @ap
5575 * Initialize SCSI host @shost associated with ATA port @ap.
5578 * Inherited from caller.
5580 static void ata_port_init_shost(struct ata_port
*ap
, struct Scsi_Host
*shost
)
5582 ap
->scsi_host
= shost
;
5584 shost
->unique_id
= ap
->id
;
5587 shost
->max_channel
= 1;
5588 shost
->max_cmd_len
= 12;
5592 * ata_port_add - Attach low-level ATA driver to system
5593 * @ent: Information provided by low-level driver
5594 * @host: Collections of ports to which we add
5595 * @port_no: Port number associated with this host
5597 * Attach low-level ATA driver to system.
5600 * PCI/etc. bus probe sem.
5603 * New ata_port on success, for NULL on error.
5605 static struct ata_port
* ata_port_add(const struct ata_probe_ent
*ent
,
5606 struct ata_host
*host
,
5607 unsigned int port_no
)
5609 struct Scsi_Host
*shost
;
5610 struct ata_port
*ap
;
5614 if (!ent
->port_ops
->error_handler
&&
5615 !(ent
->port_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5616 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5621 shost
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5625 shost
->transportt
= &ata_scsi_transport_template
;
5627 ap
= ata_shost_to_port(shost
);
5629 ata_port_init(ap
, host
, ent
, port_no
);
5630 ata_port_init_shost(ap
, shost
);
5635 static void ata_host_release(struct device
*gendev
, void *res
)
5637 struct ata_host
*host
= dev_get_drvdata(gendev
);
5640 for (i
= 0; i
< host
->n_ports
; i
++) {
5641 struct ata_port
*ap
= host
->ports
[i
];
5646 if (ap
->ops
->port_stop
)
5647 ap
->ops
->port_stop(ap
);
5649 scsi_host_put(ap
->scsi_host
);
5652 if (host
->ops
->host_stop
)
5653 host
->ops
->host_stop(host
);
5657 * ata_sas_host_init - Initialize a host struct
5658 * @host: host to initialize
5659 * @dev: device host is attached to
5660 * @flags: host flags
5664 * PCI/etc. bus probe sem.
5668 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5669 unsigned long flags
, const struct ata_port_operations
*ops
)
5671 spin_lock_init(&host
->lock
);
5673 host
->flags
= flags
;
5678 * ata_device_add - Register hardware device with ATA and SCSI layers
5679 * @ent: Probe information describing hardware device to be registered
5681 * This function processes the information provided in the probe
5682 * information struct @ent, allocates the necessary ATA and SCSI
5683 * host information structures, initializes them, and registers
5684 * everything with requisite kernel subsystems.
5686 * This function requests irqs, probes the ATA bus, and probes
5690 * PCI/etc. bus probe sem.
5693 * Number of ports registered. Zero on error (no ports registered).
5695 int ata_device_add(const struct ata_probe_ent
*ent
)
5698 struct device
*dev
= ent
->dev
;
5699 struct ata_host
*host
;
5704 if (ent
->irq
== 0) {
5705 dev_printk(KERN_ERR
, dev
, "is not available: No interrupt assigned.\n");
5709 if (!devres_open_group(dev
, ata_device_add
, GFP_KERNEL
))
5712 /* alloc a container for our list of ATA ports (buses) */
5713 host
= devres_alloc(ata_host_release
, sizeof(struct ata_host
) +
5714 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5717 devres_add(dev
, host
);
5718 dev_set_drvdata(dev
, host
);
5720 ata_host_init(host
, dev
, ent
->_host_flags
, ent
->port_ops
);
5721 host
->n_ports
= ent
->n_ports
;
5722 host
->irq
= ent
->irq
;
5723 host
->irq2
= ent
->irq2
;
5724 host
->iomap
= ent
->iomap
;
5725 host
->private_data
= ent
->private_data
;
5727 /* register each port bound to this device */
5728 for (i
= 0; i
< host
->n_ports
; i
++) {
5729 struct ata_port
*ap
;
5730 unsigned long xfer_mode_mask
;
5731 int irq_line
= ent
->irq
;
5733 ap
= ata_port_add(ent
, host
, i
);
5734 host
->ports
[i
] = ap
;
5739 if (ent
->dummy_port_mask
& (1 << i
)) {
5740 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5741 ap
->ops
= &ata_dummy_port_ops
;
5746 rc
= ap
->ops
->port_start(ap
);
5748 host
->ports
[i
] = NULL
;
5749 scsi_host_put(ap
->scsi_host
);
5753 /* Report the secondary IRQ for second channel legacy */
5754 if (i
== 1 && ent
->irq2
)
5755 irq_line
= ent
->irq2
;
5757 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5758 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5759 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5761 /* print per-port info to dmesg */
5762 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
5763 "ctl 0x%p bmdma 0x%p irq %d\n",
5764 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5765 ata_mode_string(xfer_mode_mask
),
5766 ap
->ioaddr
.cmd_addr
,
5767 ap
->ioaddr
.ctl_addr
,
5768 ap
->ioaddr
.bmdma_addr
,
5771 /* freeze port before requesting IRQ */
5772 ata_eh_freeze_port(ap
);
5775 /* obtain irq, that may be shared between channels */
5776 rc
= devm_request_irq(dev
, ent
->irq
, ent
->port_ops
->irq_handler
,
5777 ent
->irq_flags
, DRV_NAME
, host
);
5779 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5784 /* do we have a second IRQ for the other channel, eg legacy mode */
5786 /* We will get weird core code crashes later if this is true
5788 BUG_ON(ent
->irq
== ent
->irq2
);
5790 rc
= devm_request_irq(dev
, ent
->irq2
,
5791 ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5794 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5800 /* resource acquisition complete */
5801 devres_remove_group(dev
, ata_device_add
);
5803 /* perform each probe synchronously */
5804 DPRINTK("probe begin\n");
5805 for (i
= 0; i
< host
->n_ports
; i
++) {
5806 struct ata_port
*ap
= host
->ports
[i
];
5810 /* init sata_spd_limit to the current value */
5811 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
5812 int spd
= (scontrol
>> 4) & 0xf;
5813 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5815 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5817 rc
= scsi_add_host(ap
->scsi_host
, dev
);
5819 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5820 /* FIXME: do something useful here */
5821 /* FIXME: handle unconditional calls to
5822 * scsi_scan_host and ata_host_remove, below,
5827 if (ap
->ops
->error_handler
) {
5828 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5829 unsigned long flags
;
5833 /* kick EH for boot probing */
5834 spin_lock_irqsave(ap
->lock
, flags
);
5836 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
5837 ehi
->action
|= ATA_EH_SOFTRESET
;
5838 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5840 ap
->pflags
|= ATA_PFLAG_LOADING
;
5841 ata_port_schedule_eh(ap
);
5843 spin_unlock_irqrestore(ap
->lock
, flags
);
5845 /* wait for EH to finish */
5846 ata_port_wait_eh(ap
);
5848 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
5849 rc
= ata_bus_probe(ap
);
5850 DPRINTK("ata%u: bus probe end\n", ap
->id
);
5853 /* FIXME: do something useful here?
5854 * Current libata behavior will
5855 * tear down everything when
5856 * the module is removed
5857 * or the h/w is unplugged.
5863 /* probes are done, now scan each port's disk(s) */
5864 DPRINTK("host probe begin\n");
5865 for (i
= 0; i
< host
->n_ports
; i
++) {
5866 struct ata_port
*ap
= host
->ports
[i
];
5868 ata_scsi_scan_host(ap
);
5871 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5872 return ent
->n_ports
; /* success */
5875 devres_release_group(dev
, ata_device_add
);
5876 dev_set_drvdata(dev
, NULL
);
5877 VPRINTK("EXIT, returning %d\n", rc
);
5882 * ata_port_detach - Detach ATA port in prepration of device removal
5883 * @ap: ATA port to be detached
5885 * Detach all ATA devices and the associated SCSI devices of @ap;
5886 * then, remove the associated SCSI host. @ap is guaranteed to
5887 * be quiescent on return from this function.
5890 * Kernel thread context (may sleep).
5892 void ata_port_detach(struct ata_port
*ap
)
5894 unsigned long flags
;
5897 if (!ap
->ops
->error_handler
)
5900 /* tell EH we're leaving & flush EH */
5901 spin_lock_irqsave(ap
->lock
, flags
);
5902 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5903 spin_unlock_irqrestore(ap
->lock
, flags
);
5905 ata_port_wait_eh(ap
);
5907 /* EH is now guaranteed to see UNLOADING, so no new device
5908 * will be attached. Disable all existing devices.
5910 spin_lock_irqsave(ap
->lock
, flags
);
5912 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
5913 ata_dev_disable(&ap
->device
[i
]);
5915 spin_unlock_irqrestore(ap
->lock
, flags
);
5917 /* Final freeze & EH. All in-flight commands are aborted. EH
5918 * will be skipped and retrials will be terminated with bad
5921 spin_lock_irqsave(ap
->lock
, flags
);
5922 ata_port_freeze(ap
); /* won't be thawed */
5923 spin_unlock_irqrestore(ap
->lock
, flags
);
5925 ata_port_wait_eh(ap
);
5927 /* Flush hotplug task. The sequence is similar to
5928 * ata_port_flush_task().
5930 flush_workqueue(ata_aux_wq
);
5931 cancel_delayed_work(&ap
->hotplug_task
);
5932 flush_workqueue(ata_aux_wq
);
5935 /* remove the associated SCSI host */
5936 scsi_remove_host(ap
->scsi_host
);
5940 * ata_host_detach - Detach all ports of an ATA host
5941 * @host: Host to detach
5943 * Detach all ports of @host.
5946 * Kernel thread context (may sleep).
5948 void ata_host_detach(struct ata_host
*host
)
5952 for (i
= 0; i
< host
->n_ports
; i
++)
5953 ata_port_detach(host
->ports
[i
]);
5956 struct ata_probe_ent
*
5957 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
5959 struct ata_probe_ent
*probe_ent
;
5961 /* XXX - the following if can go away once all LLDs are managed */
5962 if (!list_empty(&dev
->devres_head
))
5963 probe_ent
= devm_kzalloc(dev
, sizeof(*probe_ent
), GFP_KERNEL
);
5965 probe_ent
= kzalloc(sizeof(*probe_ent
), GFP_KERNEL
);
5967 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
5968 kobject_name(&(dev
->kobj
)));
5972 INIT_LIST_HEAD(&probe_ent
->node
);
5973 probe_ent
->dev
= dev
;
5975 probe_ent
->sht
= port
->sht
;
5976 probe_ent
->port_flags
= port
->flags
;
5977 probe_ent
->pio_mask
= port
->pio_mask
;
5978 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
5979 probe_ent
->udma_mask
= port
->udma_mask
;
5980 probe_ent
->port_ops
= port
->port_ops
;
5981 probe_ent
->private_data
= port
->private_data
;
5987 * ata_std_ports - initialize ioaddr with standard port offsets.
5988 * @ioaddr: IO address structure to be initialized
5990 * Utility function which initializes data_addr, error_addr,
5991 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5992 * device_addr, status_addr, and command_addr to standard offsets
5993 * relative to cmd_addr.
5995 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5998 void ata_std_ports(struct ata_ioports
*ioaddr
)
6000 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6001 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6002 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6003 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6004 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6005 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6006 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6007 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6008 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6009 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6016 * ata_pci_remove_one - PCI layer callback for device removal
6017 * @pdev: PCI device that was removed
6019 * PCI layer indicates to libata via this hook that hot-unplug or
6020 * module unload event has occurred. Detach all ports. Resource
6021 * release is handled via devres.
6024 * Inherited from PCI layer (may sleep).
6026 void ata_pci_remove_one(struct pci_dev
*pdev
)
6028 struct device
*dev
= pci_dev_to_dev(pdev
);
6029 struct ata_host
*host
= dev_get_drvdata(dev
);
6031 ata_host_detach(host
);
6034 /* move to PCI subsystem */
6035 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6037 unsigned long tmp
= 0;
6039 switch (bits
->width
) {
6042 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6048 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6054 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6065 return (tmp
== bits
->val
) ? 1 : 0;
6068 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6070 pci_save_state(pdev
);
6072 if (mesg
.event
== PM_EVENT_SUSPEND
) {
6073 pci_disable_device(pdev
);
6074 pci_set_power_state(pdev
, PCI_D3hot
);
6078 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6082 pci_set_power_state(pdev
, PCI_D0
);
6083 pci_restore_state(pdev
);
6085 rc
= pcim_enable_device(pdev
);
6087 dev_printk(KERN_ERR
, &pdev
->dev
,
6088 "failed to enable device after resume (%d)\n", rc
);
6092 pci_set_master(pdev
);
6096 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6098 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6101 rc
= ata_host_suspend(host
, mesg
);
6105 ata_pci_device_do_suspend(pdev
, mesg
);
6110 int ata_pci_device_resume(struct pci_dev
*pdev
)
6112 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6115 rc
= ata_pci_device_do_resume(pdev
);
6117 ata_host_resume(host
);
6120 #endif /* CONFIG_PCI */
6123 static int __init
ata_init(void)
6125 ata_probe_timeout
*= HZ
;
6126 ata_wq
= create_workqueue("ata");
6130 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6132 destroy_workqueue(ata_wq
);
6136 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6140 static void __exit
ata_exit(void)
6142 destroy_workqueue(ata_wq
);
6143 destroy_workqueue(ata_aux_wq
);
6146 subsys_initcall(ata_init
);
6147 module_exit(ata_exit
);
6149 static unsigned long ratelimit_time
;
6150 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6152 int ata_ratelimit(void)
6155 unsigned long flags
;
6157 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6159 if (time_after(jiffies
, ratelimit_time
)) {
6161 ratelimit_time
= jiffies
+ (HZ
/5);
6165 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6171 * ata_wait_register - wait until register value changes
6172 * @reg: IO-mapped register
6173 * @mask: Mask to apply to read register value
6174 * @val: Wait condition
6175 * @interval_msec: polling interval in milliseconds
6176 * @timeout_msec: timeout in milliseconds
6178 * Waiting for some bits of register to change is a common
6179 * operation for ATA controllers. This function reads 32bit LE
6180 * IO-mapped register @reg and tests for the following condition.
6182 * (*@reg & mask) != val
6184 * If the condition is met, it returns; otherwise, the process is
6185 * repeated after @interval_msec until timeout.
6188 * Kernel thread context (may sleep)
6191 * The final register value.
6193 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6194 unsigned long interval_msec
,
6195 unsigned long timeout_msec
)
6197 unsigned long timeout
;
6200 tmp
= ioread32(reg
);
6202 /* Calculate timeout _after_ the first read to make sure
6203 * preceding writes reach the controller before starting to
6204 * eat away the timeout.
6206 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6208 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6209 msleep(interval_msec
);
6210 tmp
= ioread32(reg
);
6219 static void ata_dummy_noret(struct ata_port
*ap
) { }
6220 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6221 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6223 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6228 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6230 return AC_ERR_SYSTEM
;
6233 const struct ata_port_operations ata_dummy_port_ops
= {
6234 .port_disable
= ata_port_disable
,
6235 .check_status
= ata_dummy_check_status
,
6236 .check_altstatus
= ata_dummy_check_status
,
6237 .dev_select
= ata_noop_dev_select
,
6238 .qc_prep
= ata_noop_qc_prep
,
6239 .qc_issue
= ata_dummy_qc_issue
,
6240 .freeze
= ata_dummy_noret
,
6241 .thaw
= ata_dummy_noret
,
6242 .error_handler
= ata_dummy_noret
,
6243 .post_internal_cmd
= ata_dummy_qc_noret
,
6244 .irq_clear
= ata_dummy_noret
,
6245 .port_start
= ata_dummy_ret0
,
6246 .port_stop
= ata_dummy_noret
,
6250 * libata is essentially a library of internal helper functions for
6251 * low-level ATA host controller drivers. As such, the API/ABI is
6252 * likely to change as new drivers are added and updated.
6253 * Do not depend on ABI/API stability.
6256 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6257 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6258 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6259 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6260 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6261 EXPORT_SYMBOL_GPL(ata_std_ports
);
6262 EXPORT_SYMBOL_GPL(ata_host_init
);
6263 EXPORT_SYMBOL_GPL(ata_device_add
);
6264 EXPORT_SYMBOL_GPL(ata_host_detach
);
6265 EXPORT_SYMBOL_GPL(ata_sg_init
);
6266 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6267 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6268 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6269 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6270 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6271 EXPORT_SYMBOL_GPL(ata_tf_load
);
6272 EXPORT_SYMBOL_GPL(ata_tf_read
);
6273 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6274 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6275 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6276 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6277 EXPORT_SYMBOL_GPL(ata_check_status
);
6278 EXPORT_SYMBOL_GPL(ata_altstatus
);
6279 EXPORT_SYMBOL_GPL(ata_exec_command
);
6280 EXPORT_SYMBOL_GPL(ata_port_start
);
6281 EXPORT_SYMBOL_GPL(ata_interrupt
);
6282 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6283 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6284 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6285 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6286 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6287 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6288 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6289 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6290 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6291 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6292 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6293 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6294 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6295 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6296 EXPORT_SYMBOL_GPL(ata_port_probe
);
6297 EXPORT_SYMBOL_GPL(sata_set_spd
);
6298 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6299 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6300 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6301 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6302 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6303 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6304 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6305 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6306 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6307 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6308 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6309 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6310 EXPORT_SYMBOL_GPL(ata_port_disable
);
6311 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6312 EXPORT_SYMBOL_GPL(ata_wait_register
);
6313 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6314 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6315 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6316 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6317 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6318 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6319 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6320 EXPORT_SYMBOL_GPL(ata_host_intr
);
6321 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6322 EXPORT_SYMBOL_GPL(sata_scr_read
);
6323 EXPORT_SYMBOL_GPL(sata_scr_write
);
6324 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6325 EXPORT_SYMBOL_GPL(ata_port_online
);
6326 EXPORT_SYMBOL_GPL(ata_port_offline
);
6327 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6328 EXPORT_SYMBOL_GPL(ata_host_resume
);
6329 EXPORT_SYMBOL_GPL(ata_id_string
);
6330 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6331 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6332 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6334 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6335 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6336 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6339 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6340 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
6341 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6342 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6343 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6344 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6345 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6346 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6347 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6348 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6349 #endif /* CONFIG_PCI */
6351 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6352 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6354 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6355 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6356 EXPORT_SYMBOL_GPL(ata_port_abort
);
6357 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6358 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6359 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6360 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6361 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6362 EXPORT_SYMBOL_GPL(ata_do_eh
);
6363 EXPORT_SYMBOL_GPL(ata_irq_on
);
6364 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6365 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6366 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6367 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);