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
);
1571 /* print device capabilities */
1572 if (ata_msg_probe(ap
))
1573 ata_dev_printk(dev
, KERN_DEBUG
,
1574 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1575 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1577 id
[49], id
[82], id
[83], id
[84],
1578 id
[85], id
[86], id
[87], id
[88]);
1580 /* initialize to-be-configured parameters */
1581 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1582 dev
->max_sectors
= 0;
1590 * common ATA, ATAPI feature tests
1593 /* find max transfer mode; for printk only */
1594 xfer_mask
= ata_id_xfermask(id
);
1596 if (ata_msg_probe(ap
))
1599 /* ATA-specific feature tests */
1600 if (dev
->class == ATA_DEV_ATA
) {
1601 if (ata_id_is_cfa(id
)) {
1602 if (id
[162] & 1) /* CPRM may make this media unusable */
1603 ata_dev_printk(dev
, KERN_WARNING
, "ata%u: device %u supports DRM functions and may not be fully accessable.\n",
1604 ap
->id
, dev
->devno
);
1605 snprintf(revbuf
, 7, "CFA");
1608 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1610 dev
->n_sectors
= ata_id_n_sectors(id
);
1612 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1613 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1616 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1619 if (dev
->id
[59] & 0x100)
1620 dev
->multi_count
= dev
->id
[59] & 0xff;
1622 if (ata_id_has_lba(id
)) {
1623 const char *lba_desc
;
1627 dev
->flags
|= ATA_DFLAG_LBA
;
1628 if (ata_id_has_lba48(id
)) {
1629 dev
->flags
|= ATA_DFLAG_LBA48
;
1632 if (dev
->n_sectors
>= (1UL << 28) &&
1633 ata_id_has_flush_ext(id
))
1634 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1638 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1640 /* print device info to dmesg */
1641 if (ata_msg_drv(ap
) && print_info
) {
1642 ata_dev_printk(dev
, KERN_INFO
,
1643 "%s: %s, %s, max %s\n",
1644 revbuf
, modelbuf
, fwrevbuf
,
1645 ata_mode_string(xfer_mask
));
1646 ata_dev_printk(dev
, KERN_INFO
,
1647 "%Lu sectors, multi %u: %s %s\n",
1648 (unsigned long long)dev
->n_sectors
,
1649 dev
->multi_count
, lba_desc
, ncq_desc
);
1654 /* Default translation */
1655 dev
->cylinders
= id
[1];
1657 dev
->sectors
= id
[6];
1659 if (ata_id_current_chs_valid(id
)) {
1660 /* Current CHS translation is valid. */
1661 dev
->cylinders
= id
[54];
1662 dev
->heads
= id
[55];
1663 dev
->sectors
= id
[56];
1666 /* print device info to dmesg */
1667 if (ata_msg_drv(ap
) && print_info
) {
1668 ata_dev_printk(dev
, KERN_INFO
,
1669 "%s: %s, %s, max %s\n",
1670 revbuf
, modelbuf
, fwrevbuf
,
1671 ata_mode_string(xfer_mask
));
1672 ata_dev_printk(dev
, KERN_INFO
,
1673 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1674 (unsigned long long)dev
->n_sectors
,
1675 dev
->multi_count
, dev
->cylinders
,
1676 dev
->heads
, dev
->sectors
);
1683 /* ATAPI-specific feature tests */
1684 else if (dev
->class == ATA_DEV_ATAPI
) {
1685 char *cdb_intr_string
= "";
1687 rc
= atapi_cdb_len(id
);
1688 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1689 if (ata_msg_warn(ap
))
1690 ata_dev_printk(dev
, KERN_WARNING
,
1691 "unsupported CDB len\n");
1695 dev
->cdb_len
= (unsigned int) rc
;
1697 if (ata_id_cdb_intr(dev
->id
)) {
1698 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1699 cdb_intr_string
= ", CDB intr";
1702 /* print device info to dmesg */
1703 if (ata_msg_drv(ap
) && print_info
)
1704 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1705 ata_mode_string(xfer_mask
),
1709 /* determine max_sectors */
1710 dev
->max_sectors
= ATA_MAX_SECTORS
;
1711 if (dev
->flags
& ATA_DFLAG_LBA48
)
1712 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1714 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1715 /* Let the user know. We don't want to disallow opens for
1716 rescue purposes, or in case the vendor is just a blithering
1719 ata_dev_printk(dev
, KERN_WARNING
,
1720 "Drive reports diagnostics failure. This may indicate a drive\n");
1721 ata_dev_printk(dev
, KERN_WARNING
,
1722 "fault or invalid emulation. Contact drive vendor for information.\n");
1726 ata_set_port_max_cmd_len(ap
);
1728 /* limit bridge transfers to udma5, 200 sectors */
1729 if (ata_dev_knobble(dev
)) {
1730 if (ata_msg_drv(ap
) && print_info
)
1731 ata_dev_printk(dev
, KERN_INFO
,
1732 "applying bridge limits\n");
1733 dev
->udma_mask
&= ATA_UDMA5
;
1734 dev
->max_sectors
= ATA_MAX_SECTORS
;
1737 if (ap
->ops
->dev_config
)
1738 ap
->ops
->dev_config(ap
, dev
);
1740 if (ata_msg_probe(ap
))
1741 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
1742 __FUNCTION__
, ata_chk_status(ap
));
1746 if (ata_msg_probe(ap
))
1747 ata_dev_printk(dev
, KERN_DEBUG
,
1748 "%s: EXIT, err\n", __FUNCTION__
);
1753 * ata_bus_probe - Reset and probe ATA bus
1756 * Master ATA bus probing function. Initiates a hardware-dependent
1757 * bus reset, then attempts to identify any devices found on
1761 * PCI/etc. bus probe sem.
1764 * Zero on success, negative errno otherwise.
1767 int ata_bus_probe(struct ata_port
*ap
)
1769 unsigned int classes
[ATA_MAX_DEVICES
];
1770 int tries
[ATA_MAX_DEVICES
];
1771 int i
, rc
, down_xfermask
;
1772 struct ata_device
*dev
;
1776 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1777 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1782 /* reset and determine device classes */
1783 ap
->ops
->phy_reset(ap
);
1785 /* retrieve and execute the ATA task file of _GTF */
1786 ata_acpi_exec_tfs(ap
);
1788 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1789 dev
= &ap
->device
[i
];
1791 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
1792 dev
->class != ATA_DEV_UNKNOWN
)
1793 classes
[dev
->devno
] = dev
->class;
1795 classes
[dev
->devno
] = ATA_DEV_NONE
;
1797 dev
->class = ATA_DEV_UNKNOWN
;
1802 /* after the reset the device state is PIO 0 and the controller
1803 state is undefined. Record the mode */
1805 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1806 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
1808 /* read IDENTIFY page and configure devices */
1809 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1810 dev
= &ap
->device
[i
];
1813 dev
->class = classes
[i
];
1815 if (!ata_dev_enabled(dev
))
1818 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
1823 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
1824 rc
= ata_dev_configure(dev
);
1825 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
1830 /* configure transfer mode */
1831 rc
= ata_set_mode(ap
, &dev
);
1837 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1838 if (ata_dev_enabled(&ap
->device
[i
]))
1841 /* no device present, disable port */
1842 ata_port_disable(ap
);
1843 ap
->ops
->port_disable(ap
);
1850 tries
[dev
->devno
] = 0;
1853 sata_down_spd_limit(ap
);
1856 tries
[dev
->devno
]--;
1857 if (down_xfermask
&&
1858 ata_down_xfermask_limit(dev
, tries
[dev
->devno
] == 1))
1859 tries
[dev
->devno
] = 0;
1862 if (!tries
[dev
->devno
]) {
1863 ata_down_xfermask_limit(dev
, 1);
1864 ata_dev_disable(dev
);
1871 * ata_port_probe - Mark port as enabled
1872 * @ap: Port for which we indicate enablement
1874 * Modify @ap data structure such that the system
1875 * thinks that the entire port is enabled.
1877 * LOCKING: host lock, or some other form of
1881 void ata_port_probe(struct ata_port
*ap
)
1883 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1887 * sata_print_link_status - Print SATA link status
1888 * @ap: SATA port to printk link status about
1890 * This function prints link speed and status of a SATA link.
1895 static void sata_print_link_status(struct ata_port
*ap
)
1897 u32 sstatus
, scontrol
, tmp
;
1899 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1901 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1903 if (ata_port_online(ap
)) {
1904 tmp
= (sstatus
>> 4) & 0xf;
1905 ata_port_printk(ap
, KERN_INFO
,
1906 "SATA link up %s (SStatus %X SControl %X)\n",
1907 sata_spd_string(tmp
), sstatus
, scontrol
);
1909 ata_port_printk(ap
, KERN_INFO
,
1910 "SATA link down (SStatus %X SControl %X)\n",
1916 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1917 * @ap: SATA port associated with target SATA PHY.
1919 * This function issues commands to standard SATA Sxxx
1920 * PHY registers, to wake up the phy (and device), and
1921 * clear any reset condition.
1924 * PCI/etc. bus probe sem.
1927 void __sata_phy_reset(struct ata_port
*ap
)
1930 unsigned long timeout
= jiffies
+ (HZ
* 5);
1932 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1933 /* issue phy wake/reset */
1934 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1935 /* Couldn't find anything in SATA I/II specs, but
1936 * AHCI-1.1 10.4.2 says at least 1 ms. */
1939 /* phy wake/clear reset */
1940 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1942 /* wait for phy to become ready, if necessary */
1945 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1946 if ((sstatus
& 0xf) != 1)
1948 } while (time_before(jiffies
, timeout
));
1950 /* print link status */
1951 sata_print_link_status(ap
);
1953 /* TODO: phy layer with polling, timeouts, etc. */
1954 if (!ata_port_offline(ap
))
1957 ata_port_disable(ap
);
1959 if (ap
->flags
& ATA_FLAG_DISABLED
)
1962 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1963 ata_port_disable(ap
);
1967 ap
->cbl
= ATA_CBL_SATA
;
1971 * sata_phy_reset - Reset SATA bus.
1972 * @ap: SATA port associated with target SATA PHY.
1974 * This function resets the SATA bus, and then probes
1975 * the bus for devices.
1978 * PCI/etc. bus probe sem.
1981 void sata_phy_reset(struct ata_port
*ap
)
1983 __sata_phy_reset(ap
);
1984 if (ap
->flags
& ATA_FLAG_DISABLED
)
1990 * ata_dev_pair - return other device on cable
1993 * Obtain the other device on the same cable, or if none is
1994 * present NULL is returned
1997 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
1999 struct ata_port
*ap
= adev
->ap
;
2000 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2001 if (!ata_dev_enabled(pair
))
2007 * ata_port_disable - Disable port.
2008 * @ap: Port to be disabled.
2010 * Modify @ap data structure such that the system
2011 * thinks that the entire port is disabled, and should
2012 * never attempt to probe or communicate with devices
2015 * LOCKING: host lock, or some other form of
2019 void ata_port_disable(struct ata_port
*ap
)
2021 ap
->device
[0].class = ATA_DEV_NONE
;
2022 ap
->device
[1].class = ATA_DEV_NONE
;
2023 ap
->flags
|= ATA_FLAG_DISABLED
;
2027 * sata_down_spd_limit - adjust SATA spd limit downward
2028 * @ap: Port to adjust SATA spd limit for
2030 * Adjust SATA spd limit of @ap downward. Note that this
2031 * function only adjusts the limit. The change must be applied
2032 * using sata_set_spd().
2035 * Inherited from caller.
2038 * 0 on success, negative errno on failure
2040 int sata_down_spd_limit(struct ata_port
*ap
)
2042 u32 sstatus
, spd
, mask
;
2045 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2049 mask
= ap
->sata_spd_limit
;
2052 highbit
= fls(mask
) - 1;
2053 mask
&= ~(1 << highbit
);
2055 spd
= (sstatus
>> 4) & 0xf;
2059 mask
&= (1 << spd
) - 1;
2063 ap
->sata_spd_limit
= mask
;
2065 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2066 sata_spd_string(fls(mask
)));
2071 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2075 if (ap
->sata_spd_limit
== UINT_MAX
)
2078 limit
= fls(ap
->sata_spd_limit
);
2080 spd
= (*scontrol
>> 4) & 0xf;
2081 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2083 return spd
!= limit
;
2087 * sata_set_spd_needed - is SATA spd configuration needed
2088 * @ap: Port in question
2090 * Test whether the spd limit in SControl matches
2091 * @ap->sata_spd_limit. This function is used to determine
2092 * whether hardreset is necessary to apply SATA spd
2096 * Inherited from caller.
2099 * 1 if SATA spd configuration is needed, 0 otherwise.
2101 int sata_set_spd_needed(struct ata_port
*ap
)
2105 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2108 return __sata_set_spd_needed(ap
, &scontrol
);
2112 * sata_set_spd - set SATA spd according to spd limit
2113 * @ap: Port to set SATA spd for
2115 * Set SATA spd of @ap according to sata_spd_limit.
2118 * Inherited from caller.
2121 * 0 if spd doesn't need to be changed, 1 if spd has been
2122 * changed. Negative errno if SCR registers are inaccessible.
2124 int sata_set_spd(struct ata_port
*ap
)
2129 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2132 if (!__sata_set_spd_needed(ap
, &scontrol
))
2135 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2142 * This mode timing computation functionality is ported over from
2143 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2146 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2147 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2148 * for UDMA6, which is currently supported only by Maxtor drives.
2150 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2153 static const struct ata_timing ata_timing
[] = {
2155 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2156 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2157 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2158 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2160 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2161 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2162 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2163 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2164 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2166 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2168 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2169 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2170 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2172 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2173 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2174 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2176 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2177 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2178 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2179 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2181 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2182 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2183 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2185 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2190 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2191 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2193 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2195 q
->setup
= EZ(t
->setup
* 1000, T
);
2196 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2197 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2198 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2199 q
->active
= EZ(t
->active
* 1000, T
);
2200 q
->recover
= EZ(t
->recover
* 1000, T
);
2201 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2202 q
->udma
= EZ(t
->udma
* 1000, UT
);
2205 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2206 struct ata_timing
*m
, unsigned int what
)
2208 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2209 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2210 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2211 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2212 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2213 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2214 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2215 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2218 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2220 const struct ata_timing
*t
;
2222 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2223 if (t
->mode
== 0xFF)
2228 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2229 struct ata_timing
*t
, int T
, int UT
)
2231 const struct ata_timing
*s
;
2232 struct ata_timing p
;
2238 if (!(s
= ata_timing_find_mode(speed
)))
2241 memcpy(t
, s
, sizeof(*s
));
2244 * If the drive is an EIDE drive, it can tell us it needs extended
2245 * PIO/MW_DMA cycle timing.
2248 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2249 memset(&p
, 0, sizeof(p
));
2250 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2251 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2252 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2253 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2254 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2256 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2260 * Convert the timing to bus clock counts.
2263 ata_timing_quantize(t
, t
, T
, UT
);
2266 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2267 * S.M.A.R.T * and some other commands. We have to ensure that the
2268 * DMA cycle timing is slower/equal than the fastest PIO timing.
2271 if (speed
> XFER_PIO_6
) {
2272 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2273 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2277 * Lengthen active & recovery time so that cycle time is correct.
2280 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2281 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2282 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2285 if (t
->active
+ t
->recover
< t
->cycle
) {
2286 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2287 t
->recover
= t
->cycle
- t
->active
;
2294 * ata_down_xfermask_limit - adjust dev xfer masks downward
2295 * @dev: Device to adjust xfer masks
2296 * @force_pio0: Force PIO0
2298 * Adjust xfer masks of @dev downward. Note that this function
2299 * does not apply the change. Invoking ata_set_mode() afterwards
2300 * will apply the limit.
2303 * Inherited from caller.
2306 * 0 on success, negative errno on failure
2308 int ata_down_xfermask_limit(struct ata_device
*dev
, int force_pio0
)
2310 unsigned long xfer_mask
;
2313 xfer_mask
= ata_pack_xfermask(dev
->pio_mask
, dev
->mwdma_mask
,
2318 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2319 if (xfer_mask
& ATA_MASK_UDMA
)
2320 xfer_mask
&= ~ATA_MASK_MWDMA
;
2322 highbit
= fls(xfer_mask
) - 1;
2323 xfer_mask
&= ~(1 << highbit
);
2325 xfer_mask
&= 1 << ATA_SHIFT_PIO
;
2329 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2332 ata_dev_printk(dev
, KERN_WARNING
, "limiting speed to %s\n",
2333 ata_mode_string(xfer_mask
));
2341 static int ata_dev_set_mode(struct ata_device
*dev
)
2343 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2344 unsigned int err_mask
;
2347 dev
->flags
&= ~ATA_DFLAG_PIO
;
2348 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2349 dev
->flags
|= ATA_DFLAG_PIO
;
2351 err_mask
= ata_dev_set_xfermode(dev
);
2352 /* Old CFA may refuse this command, which is just fine */
2353 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2354 err_mask
&= ~AC_ERR_DEV
;
2357 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2358 "(err_mask=0x%x)\n", err_mask
);
2362 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2363 rc
= ata_dev_revalidate(dev
, 0);
2364 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2368 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2369 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2371 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2372 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2377 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2378 * @ap: port on which timings will be programmed
2379 * @r_failed_dev: out paramter for failed device
2381 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2382 * ata_set_mode() fails, pointer to the failing device is
2383 * returned in @r_failed_dev.
2386 * PCI/etc. bus probe sem.
2389 * 0 on success, negative errno otherwise
2391 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2393 struct ata_device
*dev
;
2394 int i
, rc
= 0, used_dma
= 0, found
= 0;
2396 /* has private set_mode? */
2397 if (ap
->ops
->set_mode
)
2398 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2400 /* step 1: calculate xfer_mask */
2401 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2402 unsigned int pio_mask
, dma_mask
;
2404 dev
= &ap
->device
[i
];
2406 if (!ata_dev_enabled(dev
))
2409 ata_dev_xfermask(dev
);
2411 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2412 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2413 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2414 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2423 /* step 2: always set host PIO timings */
2424 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2425 dev
= &ap
->device
[i
];
2426 if (!ata_dev_enabled(dev
))
2429 if (!dev
->pio_mode
) {
2430 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2435 dev
->xfer_mode
= dev
->pio_mode
;
2436 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2437 if (ap
->ops
->set_piomode
)
2438 ap
->ops
->set_piomode(ap
, dev
);
2441 /* step 3: set host DMA timings */
2442 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2443 dev
= &ap
->device
[i
];
2445 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2448 dev
->xfer_mode
= dev
->dma_mode
;
2449 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2450 if (ap
->ops
->set_dmamode
)
2451 ap
->ops
->set_dmamode(ap
, dev
);
2454 /* step 4: update devices' xfer mode */
2455 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2456 dev
= &ap
->device
[i
];
2458 /* don't update suspended devices' xfer mode */
2459 if (!ata_dev_ready(dev
))
2462 rc
= ata_dev_set_mode(dev
);
2467 /* Record simplex status. If we selected DMA then the other
2468 * host channels are not permitted to do so.
2470 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2471 ap
->host
->simplex_claimed
= 1;
2473 /* step5: chip specific finalisation */
2474 if (ap
->ops
->post_set_mode
)
2475 ap
->ops
->post_set_mode(ap
);
2479 *r_failed_dev
= dev
;
2484 * ata_tf_to_host - issue ATA taskfile to host controller
2485 * @ap: port to which command is being issued
2486 * @tf: ATA taskfile register set
2488 * Issues ATA taskfile register set to ATA host controller,
2489 * with proper synchronization with interrupt handler and
2493 * spin_lock_irqsave(host lock)
2496 static inline void ata_tf_to_host(struct ata_port
*ap
,
2497 const struct ata_taskfile
*tf
)
2499 ap
->ops
->tf_load(ap
, tf
);
2500 ap
->ops
->exec_command(ap
, tf
);
2504 * ata_busy_sleep - sleep until BSY clears, or timeout
2505 * @ap: port containing status register to be polled
2506 * @tmout_pat: impatience timeout
2507 * @tmout: overall timeout
2509 * Sleep until ATA Status register bit BSY clears,
2510 * or a timeout occurs.
2513 * Kernel thread context (may sleep).
2516 * 0 on success, -errno otherwise.
2518 int ata_busy_sleep(struct ata_port
*ap
,
2519 unsigned long tmout_pat
, unsigned long tmout
)
2521 unsigned long timer_start
, timeout
;
2524 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2525 timer_start
= jiffies
;
2526 timeout
= timer_start
+ tmout_pat
;
2527 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2528 time_before(jiffies
, timeout
)) {
2530 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2533 if (status
!= 0xff && (status
& ATA_BUSY
))
2534 ata_port_printk(ap
, KERN_WARNING
,
2535 "port is slow to respond, please be patient "
2536 "(Status 0x%x)\n", status
);
2538 timeout
= timer_start
+ tmout
;
2539 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2540 time_before(jiffies
, timeout
)) {
2542 status
= ata_chk_status(ap
);
2548 if (status
& ATA_BUSY
) {
2549 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2550 "(%lu secs, Status 0x%x)\n",
2551 tmout
/ HZ
, status
);
2558 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2560 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2561 unsigned int dev0
= devmask
& (1 << 0);
2562 unsigned int dev1
= devmask
& (1 << 1);
2563 unsigned long timeout
;
2565 /* if device 0 was found in ata_devchk, wait for its
2569 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2571 /* if device 1 was found in ata_devchk, wait for
2572 * register access, then wait for BSY to clear
2574 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2578 ap
->ops
->dev_select(ap
, 1);
2579 nsect
= ioread8(ioaddr
->nsect_addr
);
2580 lbal
= ioread8(ioaddr
->lbal_addr
);
2581 if ((nsect
== 1) && (lbal
== 1))
2583 if (time_after(jiffies
, timeout
)) {
2587 msleep(50); /* give drive a breather */
2590 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2592 /* is all this really necessary? */
2593 ap
->ops
->dev_select(ap
, 0);
2595 ap
->ops
->dev_select(ap
, 1);
2597 ap
->ops
->dev_select(ap
, 0);
2600 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2601 unsigned int devmask
)
2603 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2605 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2607 /* software reset. causes dev0 to be selected */
2608 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2609 udelay(20); /* FIXME: flush */
2610 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2611 udelay(20); /* FIXME: flush */
2612 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2614 /* spec mandates ">= 2ms" before checking status.
2615 * We wait 150ms, because that was the magic delay used for
2616 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2617 * between when the ATA command register is written, and then
2618 * status is checked. Because waiting for "a while" before
2619 * checking status is fine, post SRST, we perform this magic
2620 * delay here as well.
2622 * Old drivers/ide uses the 2mS rule and then waits for ready
2626 /* Before we perform post reset processing we want to see if
2627 * the bus shows 0xFF because the odd clown forgets the D7
2628 * pulldown resistor.
2630 if (ata_check_status(ap
) == 0xFF)
2633 ata_bus_post_reset(ap
, devmask
);
2639 * ata_bus_reset - reset host port and associated ATA channel
2640 * @ap: port to reset
2642 * This is typically the first time we actually start issuing
2643 * commands to the ATA channel. We wait for BSY to clear, then
2644 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2645 * result. Determine what devices, if any, are on the channel
2646 * by looking at the device 0/1 error register. Look at the signature
2647 * stored in each device's taskfile registers, to determine if
2648 * the device is ATA or ATAPI.
2651 * PCI/etc. bus probe sem.
2652 * Obtains host lock.
2655 * Sets ATA_FLAG_DISABLED if bus reset fails.
2658 void ata_bus_reset(struct ata_port
*ap
)
2660 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2661 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2663 unsigned int dev0
, dev1
= 0, devmask
= 0;
2665 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2667 /* determine if device 0/1 are present */
2668 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2671 dev0
= ata_devchk(ap
, 0);
2673 dev1
= ata_devchk(ap
, 1);
2677 devmask
|= (1 << 0);
2679 devmask
|= (1 << 1);
2681 /* select device 0 again */
2682 ap
->ops
->dev_select(ap
, 0);
2684 /* issue bus reset */
2685 if (ap
->flags
& ATA_FLAG_SRST
)
2686 if (ata_bus_softreset(ap
, devmask
))
2690 * determine by signature whether we have ATA or ATAPI devices
2692 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2693 if ((slave_possible
) && (err
!= 0x81))
2694 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2696 /* re-enable interrupts */
2697 ap
->ops
->irq_on(ap
);
2699 /* is double-select really necessary? */
2700 if (ap
->device
[1].class != ATA_DEV_NONE
)
2701 ap
->ops
->dev_select(ap
, 1);
2702 if (ap
->device
[0].class != ATA_DEV_NONE
)
2703 ap
->ops
->dev_select(ap
, 0);
2705 /* if no devices were detected, disable this port */
2706 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2707 (ap
->device
[1].class == ATA_DEV_NONE
))
2710 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2711 /* set up device control for ATA_FLAG_SATA_RESET */
2712 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2719 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2720 ap
->ops
->port_disable(ap
);
2726 * sata_phy_debounce - debounce SATA phy status
2727 * @ap: ATA port to debounce SATA phy status for
2728 * @params: timing parameters { interval, duratinon, timeout } in msec
2730 * Make sure SStatus of @ap reaches stable state, determined by
2731 * holding the same value where DET is not 1 for @duration polled
2732 * every @interval, before @timeout. Timeout constraints the
2733 * beginning of the stable state. Because, after hot unplugging,
2734 * DET gets stuck at 1 on some controllers, this functions waits
2735 * until timeout then returns 0 if DET is stable at 1.
2738 * Kernel thread context (may sleep)
2741 * 0 on success, -errno on failure.
2743 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
2745 unsigned long interval_msec
= params
[0];
2746 unsigned long duration
= params
[1] * HZ
/ 1000;
2747 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
2748 unsigned long last_jiffies
;
2752 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2757 last_jiffies
= jiffies
;
2760 msleep(interval_msec
);
2761 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2767 if (cur
== 1 && time_before(jiffies
, timeout
))
2769 if (time_after(jiffies
, last_jiffies
+ duration
))
2774 /* unstable, start over */
2776 last_jiffies
= jiffies
;
2779 if (time_after(jiffies
, timeout
))
2785 * sata_phy_resume - resume SATA phy
2786 * @ap: ATA port to resume SATA phy for
2787 * @params: timing parameters { interval, duratinon, timeout } in msec
2789 * Resume SATA phy of @ap and debounce it.
2792 * Kernel thread context (may sleep)
2795 * 0 on success, -errno on failure.
2797 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
2802 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2805 scontrol
= (scontrol
& 0x0f0) | 0x300;
2807 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2810 /* Some PHYs react badly if SStatus is pounded immediately
2811 * after resuming. Delay 200ms before debouncing.
2815 return sata_phy_debounce(ap
, params
);
2818 static void ata_wait_spinup(struct ata_port
*ap
)
2820 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2821 unsigned long end
, secs
;
2824 /* first, debounce phy if SATA */
2825 if (ap
->cbl
== ATA_CBL_SATA
) {
2826 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
2828 /* if debounced successfully and offline, no need to wait */
2829 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
2833 /* okay, let's give the drive time to spin up */
2834 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
2835 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
2837 if (time_after(jiffies
, end
))
2841 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
2842 "(%lu secs)\n", secs
);
2844 schedule_timeout_uninterruptible(end
- jiffies
);
2848 * ata_std_prereset - prepare for reset
2849 * @ap: ATA port to be reset
2851 * @ap is about to be reset. Initialize it.
2854 * Kernel thread context (may sleep)
2857 * 0 on success, -errno otherwise.
2859 int ata_std_prereset(struct ata_port
*ap
)
2861 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2862 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
2865 /* handle link resume & hotplug spinup */
2866 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
2867 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
2868 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2870 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
2871 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
2872 ata_wait_spinup(ap
);
2874 /* if we're about to do hardreset, nothing more to do */
2875 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
2878 /* if SATA, resume phy */
2879 if (ap
->cbl
== ATA_CBL_SATA
) {
2880 rc
= sata_phy_resume(ap
, timing
);
2881 if (rc
&& rc
!= -EOPNOTSUPP
) {
2882 /* phy resume failed */
2883 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
2884 "link for reset (errno=%d)\n", rc
);
2889 /* Wait for !BSY if the controller can wait for the first D2H
2890 * Reg FIS and we don't know that no device is attached.
2892 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
2893 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2899 * ata_std_softreset - reset host port via ATA SRST
2900 * @ap: port to reset
2901 * @classes: resulting classes of attached devices
2903 * Reset host port using ATA SRST.
2906 * Kernel thread context (may sleep)
2909 * 0 on success, -errno otherwise.
2911 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
2913 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2914 unsigned int devmask
= 0, err_mask
;
2919 if (ata_port_offline(ap
)) {
2920 classes
[0] = ATA_DEV_NONE
;
2924 /* determine if device 0/1 are present */
2925 if (ata_devchk(ap
, 0))
2926 devmask
|= (1 << 0);
2927 if (slave_possible
&& ata_devchk(ap
, 1))
2928 devmask
|= (1 << 1);
2930 /* select device 0 again */
2931 ap
->ops
->dev_select(ap
, 0);
2933 /* issue bus reset */
2934 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2935 err_mask
= ata_bus_softreset(ap
, devmask
);
2937 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
2942 /* determine by signature whether we have ATA or ATAPI devices */
2943 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2944 if (slave_possible
&& err
!= 0x81)
2945 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2948 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2953 * sata_port_hardreset - reset port via SATA phy reset
2954 * @ap: port to reset
2955 * @timing: timing parameters { interval, duratinon, timeout } in msec
2957 * SATA phy-reset host port using DET bits of SControl register.
2960 * Kernel thread context (may sleep)
2963 * 0 on success, -errno otherwise.
2965 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
2972 if (sata_set_spd_needed(ap
)) {
2973 /* SATA spec says nothing about how to reconfigure
2974 * spd. To be on the safe side, turn off phy during
2975 * reconfiguration. This works for at least ICH7 AHCI
2978 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2981 scontrol
= (scontrol
& 0x0f0) | 0x304;
2983 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2989 /* issue phy wake/reset */
2990 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2993 scontrol
= (scontrol
& 0x0f0) | 0x301;
2995 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
2998 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2999 * 10.4.2 says at least 1 ms.
3003 /* bring phy back */
3004 rc
= sata_phy_resume(ap
, timing
);
3006 DPRINTK("EXIT, rc=%d\n", rc
);
3011 * sata_std_hardreset - reset host port via SATA phy reset
3012 * @ap: port to reset
3013 * @class: resulting class of attached device
3015 * SATA phy-reset host port using DET bits of SControl register,
3016 * wait for !BSY and classify the attached device.
3019 * Kernel thread context (may sleep)
3022 * 0 on success, -errno otherwise.
3024 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
3026 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3032 rc
= sata_port_hardreset(ap
, timing
);
3034 ata_port_printk(ap
, KERN_ERR
,
3035 "COMRESET failed (errno=%d)\n", rc
);
3039 /* TODO: phy layer with polling, timeouts, etc. */
3040 if (ata_port_offline(ap
)) {
3041 *class = ATA_DEV_NONE
;
3042 DPRINTK("EXIT, link offline\n");
3046 /* wait a while before checking status, see SRST for more info */
3049 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
3050 ata_port_printk(ap
, KERN_ERR
,
3051 "COMRESET failed (device not ready)\n");
3055 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3057 *class = ata_dev_try_classify(ap
, 0, NULL
);
3059 DPRINTK("EXIT, class=%u\n", *class);
3064 * ata_std_postreset - standard postreset callback
3065 * @ap: the target ata_port
3066 * @classes: classes of attached devices
3068 * This function is invoked after a successful reset. Note that
3069 * the device might have been reset more than once using
3070 * different reset methods before postreset is invoked.
3073 * Kernel thread context (may sleep)
3075 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3081 /* print link status */
3082 sata_print_link_status(ap
);
3085 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3086 sata_scr_write(ap
, SCR_ERROR
, serror
);
3088 /* re-enable interrupts */
3089 if (!ap
->ops
->error_handler
)
3090 ap
->ops
->irq_on(ap
);
3092 /* is double-select really necessary? */
3093 if (classes
[0] != ATA_DEV_NONE
)
3094 ap
->ops
->dev_select(ap
, 1);
3095 if (classes
[1] != ATA_DEV_NONE
)
3096 ap
->ops
->dev_select(ap
, 0);
3098 /* bail out if no device is present */
3099 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3100 DPRINTK("EXIT, no device\n");
3104 /* set up device control */
3105 if (ap
->ioaddr
.ctl_addr
)
3106 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3112 * ata_dev_same_device - Determine whether new ID matches configured device
3113 * @dev: device to compare against
3114 * @new_class: class of the new device
3115 * @new_id: IDENTIFY page of the new device
3117 * Compare @new_class and @new_id against @dev and determine
3118 * whether @dev is the device indicated by @new_class and
3125 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3127 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3130 const u16
*old_id
= dev
->id
;
3131 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3132 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3135 if (dev
->class != new_class
) {
3136 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3137 dev
->class, new_class
);
3141 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3142 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3143 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3144 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3145 new_n_sectors
= ata_id_n_sectors(new_id
);
3147 if (strcmp(model
[0], model
[1])) {
3148 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3149 "'%s' != '%s'\n", model
[0], model
[1]);
3153 if (strcmp(serial
[0], serial
[1])) {
3154 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3155 "'%s' != '%s'\n", serial
[0], serial
[1]);
3159 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3160 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3162 (unsigned long long)dev
->n_sectors
,
3163 (unsigned long long)new_n_sectors
);
3171 * ata_dev_revalidate - Revalidate ATA device
3172 * @dev: device to revalidate
3173 * @readid_flags: read ID flags
3175 * Re-read IDENTIFY page and make sure @dev is still attached to
3179 * Kernel thread context (may sleep)
3182 * 0 on success, negative errno otherwise
3184 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3186 unsigned int class = dev
->class;
3187 u16
*id
= (void *)dev
->ap
->sector_buf
;
3190 if (!ata_dev_enabled(dev
)) {
3196 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3200 /* is the device still there? */
3201 if (!ata_dev_same_device(dev
, class, id
)) {
3206 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3208 /* configure device according to the new ID */
3209 rc
= ata_dev_configure(dev
);
3214 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3218 struct ata_blacklist_entry
{
3219 const char *model_num
;
3220 const char *model_rev
;
3221 unsigned long horkage
;
3224 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3225 /* Devices with DMA related problems under Linux */
3226 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3227 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3228 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3229 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3230 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3231 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3232 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3233 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3234 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3235 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3236 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3237 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3238 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3239 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3240 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3241 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3242 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3243 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3244 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3245 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3246 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3247 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3248 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3249 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3250 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3251 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3252 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3253 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3254 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3255 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3257 /* Devices we expect to fail diagnostics */
3259 /* Devices where NCQ should be avoided */
3261 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3263 /* Devices with NCQ limits */
3269 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3271 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3272 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3273 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3275 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3276 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3278 while (ad
->model_num
) {
3279 if (!strcmp(ad
->model_num
, model_num
)) {
3280 if (ad
->model_rev
== NULL
)
3282 if (!strcmp(ad
->model_rev
, model_rev
))
3290 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3292 /* We don't support polling DMA.
3293 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3294 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3296 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3297 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3299 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3303 * ata_dev_xfermask - Compute supported xfermask of the given device
3304 * @dev: Device to compute xfermask for
3306 * Compute supported xfermask of @dev and store it in
3307 * dev->*_mask. This function is responsible for applying all
3308 * known limits including host controller limits, device
3314 static void ata_dev_xfermask(struct ata_device
*dev
)
3316 struct ata_port
*ap
= dev
->ap
;
3317 struct ata_host
*host
= ap
->host
;
3318 unsigned long xfer_mask
;
3320 /* controller modes available */
3321 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3322 ap
->mwdma_mask
, ap
->udma_mask
);
3324 /* Apply cable rule here. Don't apply it early because when
3325 * we handle hot plug the cable type can itself change.
3327 if (ap
->cbl
== ATA_CBL_PATA40
)
3328 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3329 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3330 * host side are checked drive side as well. Cases where we know a
3331 * 40wire cable is used safely for 80 are not checked here.
3333 if (ata_drive_40wire(dev
->id
) && (ap
->cbl
== ATA_CBL_PATA_UNK
|| ap
->cbl
== ATA_CBL_PATA80
))
3334 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3337 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3338 dev
->mwdma_mask
, dev
->udma_mask
);
3339 xfer_mask
&= ata_id_xfermask(dev
->id
);
3342 * CFA Advanced TrueIDE timings are not allowed on a shared
3345 if (ata_dev_pair(dev
)) {
3346 /* No PIO5 or PIO6 */
3347 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3348 /* No MWDMA3 or MWDMA 4 */
3349 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3352 if (ata_dma_blacklisted(dev
)) {
3353 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3354 ata_dev_printk(dev
, KERN_WARNING
,
3355 "device is on DMA blacklist, disabling DMA\n");
3358 if ((host
->flags
& ATA_HOST_SIMPLEX
) && host
->simplex_claimed
) {
3359 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3360 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3361 "other device, disabling DMA\n");
3364 if (ap
->ops
->mode_filter
)
3365 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3367 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3368 &dev
->mwdma_mask
, &dev
->udma_mask
);
3372 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3373 * @dev: Device to which command will be sent
3375 * Issue SET FEATURES - XFER MODE command to device @dev
3379 * PCI/etc. bus probe sem.
3382 * 0 on success, AC_ERR_* mask otherwise.
3385 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3387 struct ata_taskfile tf
;
3388 unsigned int err_mask
;
3390 /* set up set-features taskfile */
3391 DPRINTK("set features - xfer mode\n");
3393 ata_tf_init(dev
, &tf
);
3394 tf
.command
= ATA_CMD_SET_FEATURES
;
3395 tf
.feature
= SETFEATURES_XFER
;
3396 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3397 tf
.protocol
= ATA_PROT_NODATA
;
3398 tf
.nsect
= dev
->xfer_mode
;
3400 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3402 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3407 * ata_dev_init_params - Issue INIT DEV PARAMS command
3408 * @dev: Device to which command will be sent
3409 * @heads: Number of heads (taskfile parameter)
3410 * @sectors: Number of sectors (taskfile parameter)
3413 * Kernel thread context (may sleep)
3416 * 0 on success, AC_ERR_* mask otherwise.
3418 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3419 u16 heads
, u16 sectors
)
3421 struct ata_taskfile tf
;
3422 unsigned int err_mask
;
3424 /* Number of sectors per track 1-255. Number of heads 1-16 */
3425 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3426 return AC_ERR_INVALID
;
3428 /* set up init dev params taskfile */
3429 DPRINTK("init dev params \n");
3431 ata_tf_init(dev
, &tf
);
3432 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3433 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3434 tf
.protocol
= ATA_PROT_NODATA
;
3436 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3438 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3440 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3445 * ata_sg_clean - Unmap DMA memory associated with command
3446 * @qc: Command containing DMA memory to be released
3448 * Unmap all mapped DMA memory associated with this command.
3451 * spin_lock_irqsave(host lock)
3453 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3455 struct ata_port
*ap
= qc
->ap
;
3456 struct scatterlist
*sg
= qc
->__sg
;
3457 int dir
= qc
->dma_dir
;
3458 void *pad_buf
= NULL
;
3460 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3461 WARN_ON(sg
== NULL
);
3463 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3464 WARN_ON(qc
->n_elem
> 1);
3466 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3468 /* if we padded the buffer out to 32-bit bound, and data
3469 * xfer direction is from-device, we must copy from the
3470 * pad buffer back into the supplied buffer
3472 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3473 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3475 if (qc
->flags
& ATA_QCFLAG_SG
) {
3477 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3478 /* restore last sg */
3479 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3481 struct scatterlist
*psg
= &qc
->pad_sgent
;
3482 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3483 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3484 kunmap_atomic(addr
, KM_IRQ0
);
3488 dma_unmap_single(ap
->dev
,
3489 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3492 sg
->length
+= qc
->pad_len
;
3494 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3495 pad_buf
, qc
->pad_len
);
3498 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3503 * ata_fill_sg - Fill PCI IDE PRD table
3504 * @qc: Metadata associated with taskfile to be transferred
3506 * Fill PCI IDE PRD (scatter-gather) table with segments
3507 * associated with the current disk command.
3510 * spin_lock_irqsave(host lock)
3513 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3515 struct ata_port
*ap
= qc
->ap
;
3516 struct scatterlist
*sg
;
3519 WARN_ON(qc
->__sg
== NULL
);
3520 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3523 ata_for_each_sg(sg
, qc
) {
3527 /* determine if physical DMA addr spans 64K boundary.
3528 * Note h/w doesn't support 64-bit, so we unconditionally
3529 * truncate dma_addr_t to u32.
3531 addr
= (u32
) sg_dma_address(sg
);
3532 sg_len
= sg_dma_len(sg
);
3535 offset
= addr
& 0xffff;
3537 if ((offset
+ sg_len
) > 0x10000)
3538 len
= 0x10000 - offset
;
3540 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3541 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3542 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3551 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3554 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3555 * @qc: Metadata associated with taskfile to check
3557 * Allow low-level driver to filter ATA PACKET commands, returning
3558 * a status indicating whether or not it is OK to use DMA for the
3559 * supplied PACKET command.
3562 * spin_lock_irqsave(host lock)
3564 * RETURNS: 0 when ATAPI DMA can be used
3567 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3569 struct ata_port
*ap
= qc
->ap
;
3570 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3572 if (ap
->ops
->check_atapi_dma
)
3573 rc
= ap
->ops
->check_atapi_dma(qc
);
3578 * ata_qc_prep - Prepare taskfile for submission
3579 * @qc: Metadata associated with taskfile to be prepared
3581 * Prepare ATA taskfile for submission.
3584 * spin_lock_irqsave(host lock)
3586 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3588 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3594 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3597 * ata_sg_init_one - Associate command with memory buffer
3598 * @qc: Command to be associated
3599 * @buf: Memory buffer
3600 * @buflen: Length of memory buffer, in bytes.
3602 * Initialize the data-related elements of queued_cmd @qc
3603 * to point to a single memory buffer, @buf of byte length @buflen.
3606 * spin_lock_irqsave(host lock)
3609 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3611 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3613 qc
->__sg
= &qc
->sgent
;
3615 qc
->orig_n_elem
= 1;
3617 qc
->nbytes
= buflen
;
3619 sg_init_one(&qc
->sgent
, buf
, buflen
);
3623 * ata_sg_init - Associate command with scatter-gather table.
3624 * @qc: Command to be associated
3625 * @sg: Scatter-gather table.
3626 * @n_elem: Number of elements in s/g table.
3628 * Initialize the data-related elements of queued_cmd @qc
3629 * to point to a scatter-gather table @sg, containing @n_elem
3633 * spin_lock_irqsave(host lock)
3636 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3637 unsigned int n_elem
)
3639 qc
->flags
|= ATA_QCFLAG_SG
;
3641 qc
->n_elem
= n_elem
;
3642 qc
->orig_n_elem
= n_elem
;
3646 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3647 * @qc: Command with memory buffer to be mapped.
3649 * DMA-map the memory buffer associated with queued_cmd @qc.
3652 * spin_lock_irqsave(host lock)
3655 * Zero on success, negative on error.
3658 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3660 struct ata_port
*ap
= qc
->ap
;
3661 int dir
= qc
->dma_dir
;
3662 struct scatterlist
*sg
= qc
->__sg
;
3663 dma_addr_t dma_address
;
3666 /* we must lengthen transfers to end on a 32-bit boundary */
3667 qc
->pad_len
= sg
->length
& 3;
3669 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3670 struct scatterlist
*psg
= &qc
->pad_sgent
;
3672 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3674 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3676 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3677 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3680 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3681 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3683 sg
->length
-= qc
->pad_len
;
3684 if (sg
->length
== 0)
3687 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3688 sg
->length
, qc
->pad_len
);
3696 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3698 if (dma_mapping_error(dma_address
)) {
3700 sg
->length
+= qc
->pad_len
;
3704 sg_dma_address(sg
) = dma_address
;
3705 sg_dma_len(sg
) = sg
->length
;
3708 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3709 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3715 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3716 * @qc: Command with scatter-gather table to be mapped.
3718 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3721 * spin_lock_irqsave(host lock)
3724 * Zero on success, negative on error.
3728 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3730 struct ata_port
*ap
= qc
->ap
;
3731 struct scatterlist
*sg
= qc
->__sg
;
3732 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3733 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3735 VPRINTK("ENTER, ata%u\n", ap
->id
);
3736 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3738 /* we must lengthen transfers to end on a 32-bit boundary */
3739 qc
->pad_len
= lsg
->length
& 3;
3741 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3742 struct scatterlist
*psg
= &qc
->pad_sgent
;
3743 unsigned int offset
;
3745 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3747 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3750 * psg->page/offset are used to copy to-be-written
3751 * data in this function or read data in ata_sg_clean.
3753 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3754 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3755 psg
->offset
= offset_in_page(offset
);
3757 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3758 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3759 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3760 kunmap_atomic(addr
, KM_IRQ0
);
3763 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3764 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3766 lsg
->length
-= qc
->pad_len
;
3767 if (lsg
->length
== 0)
3770 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3771 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3774 pre_n_elem
= qc
->n_elem
;
3775 if (trim_sg
&& pre_n_elem
)
3784 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3786 /* restore last sg */
3787 lsg
->length
+= qc
->pad_len
;
3791 DPRINTK("%d sg elements mapped\n", n_elem
);
3794 qc
->n_elem
= n_elem
;
3800 * swap_buf_le16 - swap halves of 16-bit words in place
3801 * @buf: Buffer to swap
3802 * @buf_words: Number of 16-bit words in buffer.
3804 * Swap halves of 16-bit words if needed to convert from
3805 * little-endian byte order to native cpu byte order, or
3809 * Inherited from caller.
3811 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3816 for (i
= 0; i
< buf_words
; i
++)
3817 buf
[i
] = le16_to_cpu(buf
[i
]);
3818 #endif /* __BIG_ENDIAN */
3822 * ata_data_xfer - Transfer data by PIO
3823 * @adev: device to target
3825 * @buflen: buffer length
3826 * @write_data: read/write
3828 * Transfer data from/to the device data register by PIO.
3831 * Inherited from caller.
3833 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3834 unsigned int buflen
, int write_data
)
3836 struct ata_port
*ap
= adev
->ap
;
3837 unsigned int words
= buflen
>> 1;
3839 /* Transfer multiple of 2 bytes */
3841 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3843 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3845 /* Transfer trailing 1 byte, if any. */
3846 if (unlikely(buflen
& 0x01)) {
3847 u16 align_buf
[1] = { 0 };
3848 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3851 memcpy(align_buf
, trailing_buf
, 1);
3852 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3854 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
3855 memcpy(trailing_buf
, align_buf
, 1);
3861 * ata_data_xfer_noirq - Transfer data by PIO
3862 * @adev: device to target
3864 * @buflen: buffer length
3865 * @write_data: read/write
3867 * Transfer data from/to the device data register by PIO. Do the
3868 * transfer with interrupts disabled.
3871 * Inherited from caller.
3873 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
3874 unsigned int buflen
, int write_data
)
3876 unsigned long flags
;
3877 local_irq_save(flags
);
3878 ata_data_xfer(adev
, buf
, buflen
, write_data
);
3879 local_irq_restore(flags
);
3884 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3885 * @qc: Command on going
3887 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3890 * Inherited from caller.
3893 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3895 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3896 struct scatterlist
*sg
= qc
->__sg
;
3897 struct ata_port
*ap
= qc
->ap
;
3899 unsigned int offset
;
3902 if (qc
->curbytes
== qc
->nbytes
- ATA_SECT_SIZE
)
3903 ap
->hsm_task_state
= HSM_ST_LAST
;
3905 page
= sg
[qc
->cursg
].page
;
3906 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
3908 /* get the current page and offset */
3909 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3910 offset
%= PAGE_SIZE
;
3912 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3914 if (PageHighMem(page
)) {
3915 unsigned long flags
;
3917 /* FIXME: use a bounce buffer */
3918 local_irq_save(flags
);
3919 buf
= kmap_atomic(page
, KM_IRQ0
);
3921 /* do the actual data transfer */
3922 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3924 kunmap_atomic(buf
, KM_IRQ0
);
3925 local_irq_restore(flags
);
3927 buf
= page_address(page
);
3928 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
3931 qc
->curbytes
+= ATA_SECT_SIZE
;
3932 qc
->cursg_ofs
+= ATA_SECT_SIZE
;
3934 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
3941 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3942 * @qc: Command on going
3944 * Transfer one or many ATA_SECT_SIZE of data from/to the
3945 * ATA device for the DRQ request.
3948 * Inherited from caller.
3951 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
3953 if (is_multi_taskfile(&qc
->tf
)) {
3954 /* READ/WRITE MULTIPLE */
3957 WARN_ON(qc
->dev
->multi_count
== 0);
3959 nsect
= min((qc
->nbytes
- qc
->curbytes
) / ATA_SECT_SIZE
,
3960 qc
->dev
->multi_count
);
3968 * atapi_send_cdb - Write CDB bytes to hardware
3969 * @ap: Port to which ATAPI device is attached.
3970 * @qc: Taskfile currently active
3972 * When device has indicated its readiness to accept
3973 * a CDB, this function is called. Send the CDB.
3979 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
3982 DPRINTK("send cdb\n");
3983 WARN_ON(qc
->dev
->cdb_len
< 12);
3985 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
3986 ata_altstatus(ap
); /* flush */
3988 switch (qc
->tf
.protocol
) {
3989 case ATA_PROT_ATAPI
:
3990 ap
->hsm_task_state
= HSM_ST
;
3992 case ATA_PROT_ATAPI_NODATA
:
3993 ap
->hsm_task_state
= HSM_ST_LAST
;
3995 case ATA_PROT_ATAPI_DMA
:
3996 ap
->hsm_task_state
= HSM_ST_LAST
;
3997 /* initiate bmdma */
3998 ap
->ops
->bmdma_start(qc
);
4004 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4005 * @qc: Command on going
4006 * @bytes: number of bytes
4008 * Transfer Transfer data from/to the ATAPI device.
4011 * Inherited from caller.
4015 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4017 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4018 struct scatterlist
*sg
= qc
->__sg
;
4019 struct ata_port
*ap
= qc
->ap
;
4022 unsigned int offset
, count
;
4024 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4025 ap
->hsm_task_state
= HSM_ST_LAST
;
4028 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4030 * The end of qc->sg is reached and the device expects
4031 * more data to transfer. In order not to overrun qc->sg
4032 * and fulfill length specified in the byte count register,
4033 * - for read case, discard trailing data from the device
4034 * - for write case, padding zero data to the device
4036 u16 pad_buf
[1] = { 0 };
4037 unsigned int words
= bytes
>> 1;
4040 if (words
) /* warning if bytes > 1 */
4041 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4042 "%u bytes trailing data\n", bytes
);
4044 for (i
= 0; i
< words
; i
++)
4045 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4047 ap
->hsm_task_state
= HSM_ST_LAST
;
4051 sg
= &qc
->__sg
[qc
->cursg
];
4054 offset
= sg
->offset
+ qc
->cursg_ofs
;
4056 /* get the current page and offset */
4057 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4058 offset
%= PAGE_SIZE
;
4060 /* don't overrun current sg */
4061 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4063 /* don't cross page boundaries */
4064 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4066 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4068 if (PageHighMem(page
)) {
4069 unsigned long flags
;
4071 /* FIXME: use bounce buffer */
4072 local_irq_save(flags
);
4073 buf
= kmap_atomic(page
, KM_IRQ0
);
4075 /* do the actual data transfer */
4076 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4078 kunmap_atomic(buf
, KM_IRQ0
);
4079 local_irq_restore(flags
);
4081 buf
= page_address(page
);
4082 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4086 qc
->curbytes
+= count
;
4087 qc
->cursg_ofs
+= count
;
4089 if (qc
->cursg_ofs
== sg
->length
) {
4099 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4100 * @qc: Command on going
4102 * Transfer Transfer data from/to the ATAPI device.
4105 * Inherited from caller.
4108 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4110 struct ata_port
*ap
= qc
->ap
;
4111 struct ata_device
*dev
= qc
->dev
;
4112 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4113 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4115 /* Abuse qc->result_tf for temp storage of intermediate TF
4116 * here to save some kernel stack usage.
4117 * For normal completion, qc->result_tf is not relevant. For
4118 * error, qc->result_tf is later overwritten by ata_qc_complete().
4119 * So, the correctness of qc->result_tf is not affected.
4121 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4122 ireason
= qc
->result_tf
.nsect
;
4123 bc_lo
= qc
->result_tf
.lbam
;
4124 bc_hi
= qc
->result_tf
.lbah
;
4125 bytes
= (bc_hi
<< 8) | bc_lo
;
4127 /* shall be cleared to zero, indicating xfer of data */
4128 if (ireason
& (1 << 0))
4131 /* make sure transfer direction matches expected */
4132 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4133 if (do_write
!= i_write
)
4136 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
4138 __atapi_pio_bytes(qc
, bytes
);
4143 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4144 qc
->err_mask
|= AC_ERR_HSM
;
4145 ap
->hsm_task_state
= HSM_ST_ERR
;
4149 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4150 * @ap: the target ata_port
4154 * 1 if ok in workqueue, 0 otherwise.
4157 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4159 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4162 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4163 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4164 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4167 if (is_atapi_taskfile(&qc
->tf
) &&
4168 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4176 * ata_hsm_qc_complete - finish a qc running on standard HSM
4177 * @qc: Command to complete
4178 * @in_wq: 1 if called from workqueue, 0 otherwise
4180 * Finish @qc which is running on standard HSM.
4183 * If @in_wq is zero, spin_lock_irqsave(host lock).
4184 * Otherwise, none on entry and grabs host lock.
4186 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4188 struct ata_port
*ap
= qc
->ap
;
4189 unsigned long flags
;
4191 if (ap
->ops
->error_handler
) {
4193 spin_lock_irqsave(ap
->lock
, flags
);
4195 /* EH might have kicked in while host lock is
4198 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4200 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4201 ap
->ops
->irq_on(ap
);
4202 ata_qc_complete(qc
);
4204 ata_port_freeze(ap
);
4207 spin_unlock_irqrestore(ap
->lock
, flags
);
4209 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4210 ata_qc_complete(qc
);
4212 ata_port_freeze(ap
);
4216 spin_lock_irqsave(ap
->lock
, flags
);
4217 ap
->ops
->irq_on(ap
);
4218 ata_qc_complete(qc
);
4219 spin_unlock_irqrestore(ap
->lock
, flags
);
4221 ata_qc_complete(qc
);
4224 ata_altstatus(ap
); /* flush */
4228 * ata_hsm_move - move the HSM to the next state.
4229 * @ap: the target ata_port
4231 * @status: current device status
4232 * @in_wq: 1 if called from workqueue, 0 otherwise
4235 * 1 when poll next status needed, 0 otherwise.
4237 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4238 u8 status
, int in_wq
)
4240 unsigned long flags
= 0;
4243 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4245 /* Make sure ata_qc_issue_prot() does not throw things
4246 * like DMA polling into the workqueue. Notice that
4247 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4249 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4252 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4253 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4255 switch (ap
->hsm_task_state
) {
4257 /* Send first data block or PACKET CDB */
4259 /* If polling, we will stay in the work queue after
4260 * sending the data. Otherwise, interrupt handler
4261 * takes over after sending the data.
4263 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4265 /* check device status */
4266 if (unlikely((status
& ATA_DRQ
) == 0)) {
4267 /* handle BSY=0, DRQ=0 as error */
4268 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4269 /* device stops HSM for abort/error */
4270 qc
->err_mask
|= AC_ERR_DEV
;
4272 /* HSM violation. Let EH handle this */
4273 qc
->err_mask
|= AC_ERR_HSM
;
4275 ap
->hsm_task_state
= HSM_ST_ERR
;
4279 /* Device should not ask for data transfer (DRQ=1)
4280 * when it finds something wrong.
4281 * We ignore DRQ here and stop the HSM by
4282 * changing hsm_task_state to HSM_ST_ERR and
4283 * let the EH abort the command or reset the device.
4285 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4286 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4288 qc
->err_mask
|= AC_ERR_HSM
;
4289 ap
->hsm_task_state
= HSM_ST_ERR
;
4293 /* Send the CDB (atapi) or the first data block (ata pio out).
4294 * During the state transition, interrupt handler shouldn't
4295 * be invoked before the data transfer is complete and
4296 * hsm_task_state is changed. Hence, the following locking.
4299 spin_lock_irqsave(ap
->lock
, flags
);
4301 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4302 /* PIO data out protocol.
4303 * send first data block.
4306 /* ata_pio_sectors() might change the state
4307 * to HSM_ST_LAST. so, the state is changed here
4308 * before ata_pio_sectors().
4310 ap
->hsm_task_state
= HSM_ST
;
4311 ata_pio_sectors(qc
);
4312 ata_altstatus(ap
); /* flush */
4315 atapi_send_cdb(ap
, qc
);
4318 spin_unlock_irqrestore(ap
->lock
, flags
);
4320 /* if polling, ata_pio_task() handles the rest.
4321 * otherwise, interrupt handler takes over from here.
4326 /* complete command or read/write the data register */
4327 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4328 /* ATAPI PIO protocol */
4329 if ((status
& ATA_DRQ
) == 0) {
4330 /* No more data to transfer or device error.
4331 * Device error will be tagged in HSM_ST_LAST.
4333 ap
->hsm_task_state
= HSM_ST_LAST
;
4337 /* Device should not ask for data transfer (DRQ=1)
4338 * when it finds something wrong.
4339 * We ignore DRQ here and stop the HSM by
4340 * changing hsm_task_state to HSM_ST_ERR and
4341 * let the EH abort the command or reset the device.
4343 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4344 printk(KERN_WARNING
"ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4346 qc
->err_mask
|= AC_ERR_HSM
;
4347 ap
->hsm_task_state
= HSM_ST_ERR
;
4351 atapi_pio_bytes(qc
);
4353 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4354 /* bad ireason reported by device */
4358 /* ATA PIO protocol */
4359 if (unlikely((status
& ATA_DRQ
) == 0)) {
4360 /* handle BSY=0, DRQ=0 as error */
4361 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4362 /* device stops HSM for abort/error */
4363 qc
->err_mask
|= AC_ERR_DEV
;
4365 /* HSM violation. Let EH handle this.
4366 * Phantom devices also trigger this
4367 * condition. Mark hint.
4369 qc
->err_mask
|= AC_ERR_HSM
|
4372 ap
->hsm_task_state
= HSM_ST_ERR
;
4376 /* For PIO reads, some devices may ask for
4377 * data transfer (DRQ=1) alone with ERR=1.
4378 * We respect DRQ here and transfer one
4379 * block of junk data before changing the
4380 * hsm_task_state to HSM_ST_ERR.
4382 * For PIO writes, ERR=1 DRQ=1 doesn't make
4383 * sense since the data block has been
4384 * transferred to the device.
4386 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4387 /* data might be corrputed */
4388 qc
->err_mask
|= AC_ERR_DEV
;
4390 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4391 ata_pio_sectors(qc
);
4393 status
= ata_wait_idle(ap
);
4396 if (status
& (ATA_BUSY
| ATA_DRQ
))
4397 qc
->err_mask
|= AC_ERR_HSM
;
4399 /* ata_pio_sectors() might change the
4400 * state to HSM_ST_LAST. so, the state
4401 * is changed after ata_pio_sectors().
4403 ap
->hsm_task_state
= HSM_ST_ERR
;
4407 ata_pio_sectors(qc
);
4409 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4410 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4413 status
= ata_wait_idle(ap
);
4418 ata_altstatus(ap
); /* flush */
4423 if (unlikely(!ata_ok(status
))) {
4424 qc
->err_mask
|= __ac_err_mask(status
);
4425 ap
->hsm_task_state
= HSM_ST_ERR
;
4429 /* no more data to transfer */
4430 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4431 ap
->id
, qc
->dev
->devno
, status
);
4433 WARN_ON(qc
->err_mask
);
4435 ap
->hsm_task_state
= HSM_ST_IDLE
;
4437 /* complete taskfile transaction */
4438 ata_hsm_qc_complete(qc
, in_wq
);
4444 /* make sure qc->err_mask is available to
4445 * know what's wrong and recover
4447 WARN_ON(qc
->err_mask
== 0);
4449 ap
->hsm_task_state
= HSM_ST_IDLE
;
4451 /* complete taskfile transaction */
4452 ata_hsm_qc_complete(qc
, in_wq
);
4464 static void ata_pio_task(struct work_struct
*work
)
4466 struct ata_port
*ap
=
4467 container_of(work
, struct ata_port
, port_task
.work
);
4468 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
4473 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4476 * This is purely heuristic. This is a fast path.
4477 * Sometimes when we enter, BSY will be cleared in
4478 * a chk-status or two. If not, the drive is probably seeking
4479 * or something. Snooze for a couple msecs, then
4480 * chk-status again. If still busy, queue delayed work.
4482 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4483 if (status
& ATA_BUSY
) {
4485 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4486 if (status
& ATA_BUSY
) {
4487 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4493 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4495 /* another command or interrupt handler
4496 * may be running at this point.
4503 * ata_qc_new - Request an available ATA command, for queueing
4504 * @ap: Port associated with device @dev
4505 * @dev: Device from whom we request an available command structure
4511 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4513 struct ata_queued_cmd
*qc
= NULL
;
4516 /* no command while frozen */
4517 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4520 /* the last tag is reserved for internal command. */
4521 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4522 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4523 qc
= __ata_qc_from_tag(ap
, i
);
4534 * ata_qc_new_init - Request an available ATA command, and initialize it
4535 * @dev: Device from whom we request an available command structure
4541 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4543 struct ata_port
*ap
= dev
->ap
;
4544 struct ata_queued_cmd
*qc
;
4546 qc
= ata_qc_new(ap
);
4559 * ata_qc_free - free unused ata_queued_cmd
4560 * @qc: Command to complete
4562 * Designed to free unused ata_queued_cmd object
4563 * in case something prevents using it.
4566 * spin_lock_irqsave(host lock)
4568 void ata_qc_free(struct ata_queued_cmd
*qc
)
4570 struct ata_port
*ap
= qc
->ap
;
4573 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4577 if (likely(ata_tag_valid(tag
))) {
4578 qc
->tag
= ATA_TAG_POISON
;
4579 clear_bit(tag
, &ap
->qc_allocated
);
4583 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4585 struct ata_port
*ap
= qc
->ap
;
4587 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4588 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4590 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4593 /* command should be marked inactive atomically with qc completion */
4594 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4595 ap
->sactive
&= ~(1 << qc
->tag
);
4597 ap
->active_tag
= ATA_TAG_POISON
;
4599 /* atapi: mark qc as inactive to prevent the interrupt handler
4600 * from completing the command twice later, before the error handler
4601 * is called. (when rc != 0 and atapi request sense is needed)
4603 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4604 ap
->qc_active
&= ~(1 << qc
->tag
);
4606 /* call completion callback */
4607 qc
->complete_fn(qc
);
4610 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4612 struct ata_port
*ap
= qc
->ap
;
4614 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4615 qc
->result_tf
.flags
= qc
->tf
.flags
;
4619 * ata_qc_complete - Complete an active ATA command
4620 * @qc: Command to complete
4621 * @err_mask: ATA Status register contents
4623 * Indicate to the mid and upper layers that an ATA
4624 * command has completed, with either an ok or not-ok status.
4627 * spin_lock_irqsave(host lock)
4629 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4631 struct ata_port
*ap
= qc
->ap
;
4633 /* XXX: New EH and old EH use different mechanisms to
4634 * synchronize EH with regular execution path.
4636 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4637 * Normal execution path is responsible for not accessing a
4638 * failed qc. libata core enforces the rule by returning NULL
4639 * from ata_qc_from_tag() for failed qcs.
4641 * Old EH depends on ata_qc_complete() nullifying completion
4642 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4643 * not synchronize with interrupt handler. Only PIO task is
4646 if (ap
->ops
->error_handler
) {
4647 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4649 if (unlikely(qc
->err_mask
))
4650 qc
->flags
|= ATA_QCFLAG_FAILED
;
4652 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4653 if (!ata_tag_internal(qc
->tag
)) {
4654 /* always fill result TF for failed qc */
4656 ata_qc_schedule_eh(qc
);
4661 /* read result TF if requested */
4662 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4665 __ata_qc_complete(qc
);
4667 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4670 /* read result TF if failed or requested */
4671 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4674 __ata_qc_complete(qc
);
4679 * ata_qc_complete_multiple - Complete multiple qcs successfully
4680 * @ap: port in question
4681 * @qc_active: new qc_active mask
4682 * @finish_qc: LLDD callback invoked before completing a qc
4684 * Complete in-flight commands. This functions is meant to be
4685 * called from low-level driver's interrupt routine to complete
4686 * requests normally. ap->qc_active and @qc_active is compared
4687 * and commands are completed accordingly.
4690 * spin_lock_irqsave(host lock)
4693 * Number of completed commands on success, -errno otherwise.
4695 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4696 void (*finish_qc
)(struct ata_queued_cmd
*))
4702 done_mask
= ap
->qc_active
^ qc_active
;
4704 if (unlikely(done_mask
& qc_active
)) {
4705 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4706 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4710 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4711 struct ata_queued_cmd
*qc
;
4713 if (!(done_mask
& (1 << i
)))
4716 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4719 ata_qc_complete(qc
);
4727 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4729 struct ata_port
*ap
= qc
->ap
;
4731 switch (qc
->tf
.protocol
) {
4734 case ATA_PROT_ATAPI_DMA
:
4737 case ATA_PROT_ATAPI
:
4739 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4752 * ata_qc_issue - issue taskfile to device
4753 * @qc: command to issue to device
4755 * Prepare an ATA command to submission to device.
4756 * This includes mapping the data into a DMA-able
4757 * area, filling in the S/G table, and finally
4758 * writing the taskfile to hardware, starting the command.
4761 * spin_lock_irqsave(host lock)
4763 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4765 struct ata_port
*ap
= qc
->ap
;
4767 /* Make sure only one non-NCQ command is outstanding. The
4768 * check is skipped for old EH because it reuses active qc to
4769 * request ATAPI sense.
4771 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4773 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4774 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4775 ap
->sactive
|= 1 << qc
->tag
;
4777 WARN_ON(ap
->sactive
);
4778 ap
->active_tag
= qc
->tag
;
4781 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4782 ap
->qc_active
|= 1 << qc
->tag
;
4784 if (ata_should_dma_map(qc
)) {
4785 if (qc
->flags
& ATA_QCFLAG_SG
) {
4786 if (ata_sg_setup(qc
))
4788 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4789 if (ata_sg_setup_one(qc
))
4793 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4796 ap
->ops
->qc_prep(qc
);
4798 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4799 if (unlikely(qc
->err_mask
))
4804 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4805 qc
->err_mask
|= AC_ERR_SYSTEM
;
4807 ata_qc_complete(qc
);
4811 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4812 * @qc: command to issue to device
4814 * Using various libata functions and hooks, this function
4815 * starts an ATA command. ATA commands are grouped into
4816 * classes called "protocols", and issuing each type of protocol
4817 * is slightly different.
4819 * May be used as the qc_issue() entry in ata_port_operations.
4822 * spin_lock_irqsave(host lock)
4825 * Zero on success, AC_ERR_* mask on failure
4828 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4830 struct ata_port
*ap
= qc
->ap
;
4832 /* Use polling pio if the LLD doesn't handle
4833 * interrupt driven pio and atapi CDB interrupt.
4835 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4836 switch (qc
->tf
.protocol
) {
4838 case ATA_PROT_NODATA
:
4839 case ATA_PROT_ATAPI
:
4840 case ATA_PROT_ATAPI_NODATA
:
4841 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4843 case ATA_PROT_ATAPI_DMA
:
4844 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4845 /* see ata_dma_blacklisted() */
4853 /* Some controllers show flaky interrupt behavior after
4854 * setting xfer mode. Use polling instead.
4856 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
4857 qc
->tf
.feature
== SETFEATURES_XFER
) &&
4858 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
4859 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4861 /* select the device */
4862 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4864 /* start the command */
4865 switch (qc
->tf
.protocol
) {
4866 case ATA_PROT_NODATA
:
4867 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4868 ata_qc_set_polling(qc
);
4870 ata_tf_to_host(ap
, &qc
->tf
);
4871 ap
->hsm_task_state
= HSM_ST_LAST
;
4873 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4874 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4879 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4881 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4882 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4883 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4884 ap
->hsm_task_state
= HSM_ST_LAST
;
4888 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4889 ata_qc_set_polling(qc
);
4891 ata_tf_to_host(ap
, &qc
->tf
);
4893 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4894 /* PIO data out protocol */
4895 ap
->hsm_task_state
= HSM_ST_FIRST
;
4896 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4898 /* always send first data block using
4899 * the ata_pio_task() codepath.
4902 /* PIO data in protocol */
4903 ap
->hsm_task_state
= HSM_ST
;
4905 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4906 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4908 /* if polling, ata_pio_task() handles the rest.
4909 * otherwise, interrupt handler takes over from here.
4915 case ATA_PROT_ATAPI
:
4916 case ATA_PROT_ATAPI_NODATA
:
4917 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4918 ata_qc_set_polling(qc
);
4920 ata_tf_to_host(ap
, &qc
->tf
);
4922 ap
->hsm_task_state
= HSM_ST_FIRST
;
4924 /* send cdb by polling if no cdb interrupt */
4925 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
4926 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
4927 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4930 case ATA_PROT_ATAPI_DMA
:
4931 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4933 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4934 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4935 ap
->hsm_task_state
= HSM_ST_FIRST
;
4937 /* send cdb by polling if no cdb interrupt */
4938 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4939 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
4944 return AC_ERR_SYSTEM
;
4951 * ata_host_intr - Handle host interrupt for given (port, task)
4952 * @ap: Port on which interrupt arrived (possibly...)
4953 * @qc: Taskfile currently active in engine
4955 * Handle host interrupt for given queued command. Currently,
4956 * only DMA interrupts are handled. All other commands are
4957 * handled via polling with interrupts disabled (nIEN bit).
4960 * spin_lock_irqsave(host lock)
4963 * One if interrupt was handled, zero if not (shared irq).
4966 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4967 struct ata_queued_cmd
*qc
)
4969 struct ata_eh_info
*ehi
= &ap
->eh_info
;
4970 u8 status
, host_stat
= 0;
4972 VPRINTK("ata%u: protocol %d task_state %d\n",
4973 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
4975 /* Check whether we are expecting interrupt in this state */
4976 switch (ap
->hsm_task_state
) {
4978 /* Some pre-ATAPI-4 devices assert INTRQ
4979 * at this state when ready to receive CDB.
4982 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4983 * The flag was turned on only for atapi devices.
4984 * No need to check is_atapi_taskfile(&qc->tf) again.
4986 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4990 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
4991 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
4992 /* check status of DMA engine */
4993 host_stat
= ap
->ops
->bmdma_status(ap
);
4994 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4996 /* if it's not our irq... */
4997 if (!(host_stat
& ATA_DMA_INTR
))
5000 /* before we do anything else, clear DMA-Start bit */
5001 ap
->ops
->bmdma_stop(qc
);
5003 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5004 /* error when transfering data to/from memory */
5005 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5006 ap
->hsm_task_state
= HSM_ST_ERR
;
5016 /* check altstatus */
5017 status
= ata_altstatus(ap
);
5018 if (status
& ATA_BUSY
)
5021 /* check main status, clearing INTRQ */
5022 status
= ata_chk_status(ap
);
5023 if (unlikely(status
& ATA_BUSY
))
5026 /* ack bmdma irq events */
5027 ap
->ops
->irq_clear(ap
);
5029 ata_hsm_move(ap
, qc
, status
, 0);
5031 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5032 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5033 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5035 return 1; /* irq handled */
5038 ap
->stats
.idle_irq
++;
5041 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5042 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5043 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5047 return 0; /* irq not handled */
5051 * ata_interrupt - Default ATA host interrupt handler
5052 * @irq: irq line (unused)
5053 * @dev_instance: pointer to our ata_host information structure
5055 * Default interrupt handler for PCI IDE devices. Calls
5056 * ata_host_intr() for each port that is not disabled.
5059 * Obtains host lock during operation.
5062 * IRQ_NONE or IRQ_HANDLED.
5065 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5067 struct ata_host
*host
= dev_instance
;
5069 unsigned int handled
= 0;
5070 unsigned long flags
;
5072 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5073 spin_lock_irqsave(&host
->lock
, flags
);
5075 for (i
= 0; i
< host
->n_ports
; i
++) {
5076 struct ata_port
*ap
;
5078 ap
= host
->ports
[i
];
5080 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5081 struct ata_queued_cmd
*qc
;
5083 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5084 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5085 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5086 handled
|= ata_host_intr(ap
, qc
);
5090 spin_unlock_irqrestore(&host
->lock
, flags
);
5092 return IRQ_RETVAL(handled
);
5096 * sata_scr_valid - test whether SCRs are accessible
5097 * @ap: ATA port to test SCR accessibility for
5099 * Test whether SCRs are accessible for @ap.
5105 * 1 if SCRs are accessible, 0 otherwise.
5107 int sata_scr_valid(struct ata_port
*ap
)
5109 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5113 * sata_scr_read - read SCR register of the specified port
5114 * @ap: ATA port to read SCR for
5116 * @val: Place to store read value
5118 * Read SCR register @reg of @ap into *@val. This function is
5119 * guaranteed to succeed if the cable type of the port is SATA
5120 * and the port implements ->scr_read.
5126 * 0 on success, negative errno on failure.
5128 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5130 if (sata_scr_valid(ap
)) {
5131 *val
= ap
->ops
->scr_read(ap
, reg
);
5138 * sata_scr_write - write SCR register of the specified port
5139 * @ap: ATA port to write SCR for
5140 * @reg: SCR to write
5141 * @val: value to write
5143 * Write @val to SCR register @reg of @ap. This function is
5144 * guaranteed to succeed if the cable type of the port is SATA
5145 * and the port implements ->scr_read.
5151 * 0 on success, negative errno on failure.
5153 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5155 if (sata_scr_valid(ap
)) {
5156 ap
->ops
->scr_write(ap
, reg
, val
);
5163 * sata_scr_write_flush - write SCR register of the specified port and flush
5164 * @ap: ATA port to write SCR for
5165 * @reg: SCR to write
5166 * @val: value to write
5168 * This function is identical to sata_scr_write() except that this
5169 * function performs flush after writing to the register.
5175 * 0 on success, negative errno on failure.
5177 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5179 if (sata_scr_valid(ap
)) {
5180 ap
->ops
->scr_write(ap
, reg
, val
);
5181 ap
->ops
->scr_read(ap
, reg
);
5188 * ata_port_online - test whether the given port is online
5189 * @ap: ATA port to test
5191 * Test whether @ap is online. Note that this function returns 0
5192 * if online status of @ap cannot be obtained, so
5193 * ata_port_online(ap) != !ata_port_offline(ap).
5199 * 1 if the port online status is available and online.
5201 int ata_port_online(struct ata_port
*ap
)
5205 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5211 * ata_port_offline - test whether the given port is offline
5212 * @ap: ATA port to test
5214 * Test whether @ap is offline. Note that this function returns
5215 * 0 if offline status of @ap cannot be obtained, so
5216 * ata_port_online(ap) != !ata_port_offline(ap).
5222 * 1 if the port offline status is available and offline.
5224 int ata_port_offline(struct ata_port
*ap
)
5228 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5233 int ata_flush_cache(struct ata_device
*dev
)
5235 unsigned int err_mask
;
5238 if (!ata_try_flush_cache(dev
))
5241 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5242 cmd
= ATA_CMD_FLUSH_EXT
;
5244 cmd
= ATA_CMD_FLUSH
;
5246 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5248 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5255 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5256 unsigned int action
, unsigned int ehi_flags
,
5259 unsigned long flags
;
5262 for (i
= 0; i
< host
->n_ports
; i
++) {
5263 struct ata_port
*ap
= host
->ports
[i
];
5265 /* Previous resume operation might still be in
5266 * progress. Wait for PM_PENDING to clear.
5268 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5269 ata_port_wait_eh(ap
);
5270 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5273 /* request PM ops to EH */
5274 spin_lock_irqsave(ap
->lock
, flags
);
5279 ap
->pm_result
= &rc
;
5282 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5283 ap
->eh_info
.action
|= action
;
5284 ap
->eh_info
.flags
|= ehi_flags
;
5286 ata_port_schedule_eh(ap
);
5288 spin_unlock_irqrestore(ap
->lock
, flags
);
5290 /* wait and check result */
5292 ata_port_wait_eh(ap
);
5293 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5303 * ata_host_suspend - suspend host
5304 * @host: host to suspend
5307 * Suspend @host. Actual operation is performed by EH. This
5308 * function requests EH to perform PM operations and waits for EH
5312 * Kernel thread context (may sleep).
5315 * 0 on success, -errno on failure.
5317 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5321 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5325 /* EH is quiescent now. Fail if we have any ready device.
5326 * This happens if hotplug occurs between completion of device
5327 * suspension and here.
5329 for (i
= 0; i
< host
->n_ports
; i
++) {
5330 struct ata_port
*ap
= host
->ports
[i
];
5332 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5333 struct ata_device
*dev
= &ap
->device
[j
];
5335 if (ata_dev_ready(dev
)) {
5336 ata_port_printk(ap
, KERN_WARNING
,
5337 "suspend failed, device %d "
5338 "still active\n", dev
->devno
);
5345 host
->dev
->power
.power_state
= mesg
;
5349 ata_host_resume(host
);
5354 * ata_host_resume - resume host
5355 * @host: host to resume
5357 * Resume @host. Actual operation is performed by EH. This
5358 * function requests EH to perform PM operations and returns.
5359 * Note that all resume operations are performed parallely.
5362 * Kernel thread context (may sleep).
5364 void ata_host_resume(struct ata_host
*host
)
5366 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5367 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5368 host
->dev
->power
.power_state
= PMSG_ON
;
5372 * ata_port_start - Set port up for dma.
5373 * @ap: Port to initialize
5375 * Called just after data structures for each port are
5376 * initialized. Allocates space for PRD table.
5378 * May be used as the port_start() entry in ata_port_operations.
5381 * Inherited from caller.
5383 int ata_port_start(struct ata_port
*ap
)
5385 struct device
*dev
= ap
->dev
;
5388 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5393 rc
= ata_pad_alloc(ap
, dev
);
5397 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5398 (unsigned long long)ap
->prd_dma
);
5403 * ata_dev_init - Initialize an ata_device structure
5404 * @dev: Device structure to initialize
5406 * Initialize @dev in preparation for probing.
5409 * Inherited from caller.
5411 void ata_dev_init(struct ata_device
*dev
)
5413 struct ata_port
*ap
= dev
->ap
;
5414 unsigned long flags
;
5416 /* SATA spd limit is bound to the first device */
5417 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5419 /* High bits of dev->flags are used to record warm plug
5420 * requests which occur asynchronously. Synchronize using
5423 spin_lock_irqsave(ap
->lock
, flags
);
5424 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5425 spin_unlock_irqrestore(ap
->lock
, flags
);
5427 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5428 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5429 dev
->pio_mask
= UINT_MAX
;
5430 dev
->mwdma_mask
= UINT_MAX
;
5431 dev
->udma_mask
= UINT_MAX
;
5435 * ata_port_init - Initialize an ata_port structure
5436 * @ap: Structure to initialize
5437 * @host: Collection of hosts to which @ap belongs
5438 * @ent: Probe information provided by low-level driver
5439 * @port_no: Port number associated with this ata_port
5441 * Initialize a new ata_port structure.
5444 * Inherited from caller.
5446 void ata_port_init(struct ata_port
*ap
, struct ata_host
*host
,
5447 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5451 ap
->lock
= &host
->lock
;
5452 ap
->flags
= ATA_FLAG_DISABLED
;
5453 ap
->id
= ata_unique_id
++;
5454 ap
->ctl
= ATA_DEVCTL_OBS
;
5457 ap
->port_no
= port_no
;
5458 if (port_no
== 1 && ent
->pinfo2
) {
5459 ap
->pio_mask
= ent
->pinfo2
->pio_mask
;
5460 ap
->mwdma_mask
= ent
->pinfo2
->mwdma_mask
;
5461 ap
->udma_mask
= ent
->pinfo2
->udma_mask
;
5462 ap
->flags
|= ent
->pinfo2
->flags
;
5463 ap
->ops
= ent
->pinfo2
->port_ops
;
5465 ap
->pio_mask
= ent
->pio_mask
;
5466 ap
->mwdma_mask
= ent
->mwdma_mask
;
5467 ap
->udma_mask
= ent
->udma_mask
;
5468 ap
->flags
|= ent
->port_flags
;
5469 ap
->ops
= ent
->port_ops
;
5471 ap
->hw_sata_spd_limit
= UINT_MAX
;
5472 ap
->active_tag
= ATA_TAG_POISON
;
5473 ap
->last_ctl
= 0xFF;
5475 #if defined(ATA_VERBOSE_DEBUG)
5476 /* turn on all debugging levels */
5477 ap
->msg_enable
= 0x00FF;
5478 #elif defined(ATA_DEBUG)
5479 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5481 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5484 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5485 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5486 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5487 INIT_LIST_HEAD(&ap
->eh_done_q
);
5488 init_waitqueue_head(&ap
->eh_wait_q
);
5490 /* set cable type */
5491 ap
->cbl
= ATA_CBL_NONE
;
5492 if (ap
->flags
& ATA_FLAG_SATA
)
5493 ap
->cbl
= ATA_CBL_SATA
;
5495 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5496 struct ata_device
*dev
= &ap
->device
[i
];
5503 ap
->stats
.unhandled_irq
= 1;
5504 ap
->stats
.idle_irq
= 1;
5507 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5511 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5512 * @ap: ATA port to initialize SCSI host for
5513 * @shost: SCSI host associated with @ap
5515 * Initialize SCSI host @shost associated with ATA port @ap.
5518 * Inherited from caller.
5520 static void ata_port_init_shost(struct ata_port
*ap
, struct Scsi_Host
*shost
)
5522 ap
->scsi_host
= shost
;
5524 shost
->unique_id
= ap
->id
;
5527 shost
->max_channel
= 1;
5528 shost
->max_cmd_len
= 12;
5532 * ata_port_add - Attach low-level ATA driver to system
5533 * @ent: Information provided by low-level driver
5534 * @host: Collections of ports to which we add
5535 * @port_no: Port number associated with this host
5537 * Attach low-level ATA driver to system.
5540 * PCI/etc. bus probe sem.
5543 * New ata_port on success, for NULL on error.
5545 static struct ata_port
* ata_port_add(const struct ata_probe_ent
*ent
,
5546 struct ata_host
*host
,
5547 unsigned int port_no
)
5549 struct Scsi_Host
*shost
;
5550 struct ata_port
*ap
;
5554 if (!ent
->port_ops
->error_handler
&&
5555 !(ent
->port_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5556 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5561 shost
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5565 shost
->transportt
= &ata_scsi_transport_template
;
5567 ap
= ata_shost_to_port(shost
);
5569 ata_port_init(ap
, host
, ent
, port_no
);
5570 ata_port_init_shost(ap
, shost
);
5575 static void ata_host_release(struct device
*gendev
, void *res
)
5577 struct ata_host
*host
= dev_get_drvdata(gendev
);
5580 for (i
= 0; i
< host
->n_ports
; i
++) {
5581 struct ata_port
*ap
= host
->ports
[i
];
5586 if (ap
->ops
->port_stop
)
5587 ap
->ops
->port_stop(ap
);
5589 scsi_host_put(ap
->scsi_host
);
5592 if (host
->ops
->host_stop
)
5593 host
->ops
->host_stop(host
);
5597 * ata_sas_host_init - Initialize a host struct
5598 * @host: host to initialize
5599 * @dev: device host is attached to
5600 * @flags: host flags
5604 * PCI/etc. bus probe sem.
5608 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5609 unsigned long flags
, const struct ata_port_operations
*ops
)
5611 spin_lock_init(&host
->lock
);
5613 host
->flags
= flags
;
5618 * ata_device_add - Register hardware device with ATA and SCSI layers
5619 * @ent: Probe information describing hardware device to be registered
5621 * This function processes the information provided in the probe
5622 * information struct @ent, allocates the necessary ATA and SCSI
5623 * host information structures, initializes them, and registers
5624 * everything with requisite kernel subsystems.
5626 * This function requests irqs, probes the ATA bus, and probes
5630 * PCI/etc. bus probe sem.
5633 * Number of ports registered. Zero on error (no ports registered).
5635 int ata_device_add(const struct ata_probe_ent
*ent
)
5638 struct device
*dev
= ent
->dev
;
5639 struct ata_host
*host
;
5644 if (ent
->irq
== 0) {
5645 dev_printk(KERN_ERR
, dev
, "is not available: No interrupt assigned.\n");
5649 if (!devres_open_group(dev
, ata_device_add
, GFP_KERNEL
))
5652 /* alloc a container for our list of ATA ports (buses) */
5653 host
= devres_alloc(ata_host_release
, sizeof(struct ata_host
) +
5654 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5657 devres_add(dev
, host
);
5658 dev_set_drvdata(dev
, host
);
5660 ata_host_init(host
, dev
, ent
->_host_flags
, ent
->port_ops
);
5661 host
->n_ports
= ent
->n_ports
;
5662 host
->irq
= ent
->irq
;
5663 host
->irq2
= ent
->irq2
;
5664 host
->iomap
= ent
->iomap
;
5665 host
->private_data
= ent
->private_data
;
5667 /* register each port bound to this device */
5668 for (i
= 0; i
< host
->n_ports
; i
++) {
5669 struct ata_port
*ap
;
5670 unsigned long xfer_mode_mask
;
5671 int irq_line
= ent
->irq
;
5673 ap
= ata_port_add(ent
, host
, i
);
5674 host
->ports
[i
] = ap
;
5679 if (ent
->dummy_port_mask
& (1 << i
)) {
5680 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5681 ap
->ops
= &ata_dummy_port_ops
;
5686 rc
= ap
->ops
->port_start(ap
);
5688 host
->ports
[i
] = NULL
;
5689 scsi_host_put(ap
->scsi_host
);
5693 /* Report the secondary IRQ for second channel legacy */
5694 if (i
== 1 && ent
->irq2
)
5695 irq_line
= ent
->irq2
;
5697 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5698 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5699 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5701 /* print per-port info to dmesg */
5702 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
5703 "ctl 0x%p bmdma 0x%p irq %d\n",
5704 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5705 ata_mode_string(xfer_mode_mask
),
5706 ap
->ioaddr
.cmd_addr
,
5707 ap
->ioaddr
.ctl_addr
,
5708 ap
->ioaddr
.bmdma_addr
,
5711 /* freeze port before requesting IRQ */
5712 ata_eh_freeze_port(ap
);
5715 /* obtain irq, that may be shared between channels */
5716 rc
= devm_request_irq(dev
, ent
->irq
, ent
->port_ops
->irq_handler
,
5717 ent
->irq_flags
, DRV_NAME
, host
);
5719 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5724 /* do we have a second IRQ for the other channel, eg legacy mode */
5726 /* We will get weird core code crashes later if this is true
5728 BUG_ON(ent
->irq
== ent
->irq2
);
5730 rc
= devm_request_irq(dev
, ent
->irq2
,
5731 ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5734 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5740 /* resource acquisition complete */
5741 devres_remove_group(dev
, ata_device_add
);
5743 /* perform each probe synchronously */
5744 DPRINTK("probe begin\n");
5745 for (i
= 0; i
< host
->n_ports
; i
++) {
5746 struct ata_port
*ap
= host
->ports
[i
];
5750 /* init sata_spd_limit to the current value */
5751 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
5752 int spd
= (scontrol
>> 4) & 0xf;
5753 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5755 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5757 rc
= scsi_add_host(ap
->scsi_host
, dev
);
5759 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5760 /* FIXME: do something useful here */
5761 /* FIXME: handle unconditional calls to
5762 * scsi_scan_host and ata_host_remove, below,
5767 if (ap
->ops
->error_handler
) {
5768 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5769 unsigned long flags
;
5773 /* kick EH for boot probing */
5774 spin_lock_irqsave(ap
->lock
, flags
);
5776 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
5777 ehi
->action
|= ATA_EH_SOFTRESET
;
5778 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5780 ap
->pflags
|= ATA_PFLAG_LOADING
;
5781 ata_port_schedule_eh(ap
);
5783 spin_unlock_irqrestore(ap
->lock
, flags
);
5785 /* wait for EH to finish */
5786 ata_port_wait_eh(ap
);
5788 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
5789 rc
= ata_bus_probe(ap
);
5790 DPRINTK("ata%u: bus probe end\n", ap
->id
);
5793 /* FIXME: do something useful here?
5794 * Current libata behavior will
5795 * tear down everything when
5796 * the module is removed
5797 * or the h/w is unplugged.
5803 /* probes are done, now scan each port's disk(s) */
5804 DPRINTK("host probe begin\n");
5805 for (i
= 0; i
< host
->n_ports
; i
++) {
5806 struct ata_port
*ap
= host
->ports
[i
];
5808 ata_scsi_scan_host(ap
);
5811 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5812 return ent
->n_ports
; /* success */
5815 devres_release_group(dev
, ata_device_add
);
5816 dev_set_drvdata(dev
, NULL
);
5817 VPRINTK("EXIT, returning %d\n", rc
);
5822 * ata_port_detach - Detach ATA port in prepration of device removal
5823 * @ap: ATA port to be detached
5825 * Detach all ATA devices and the associated SCSI devices of @ap;
5826 * then, remove the associated SCSI host. @ap is guaranteed to
5827 * be quiescent on return from this function.
5830 * Kernel thread context (may sleep).
5832 void ata_port_detach(struct ata_port
*ap
)
5834 unsigned long flags
;
5837 if (!ap
->ops
->error_handler
)
5840 /* tell EH we're leaving & flush EH */
5841 spin_lock_irqsave(ap
->lock
, flags
);
5842 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5843 spin_unlock_irqrestore(ap
->lock
, flags
);
5845 ata_port_wait_eh(ap
);
5847 /* EH is now guaranteed to see UNLOADING, so no new device
5848 * will be attached. Disable all existing devices.
5850 spin_lock_irqsave(ap
->lock
, flags
);
5852 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
5853 ata_dev_disable(&ap
->device
[i
]);
5855 spin_unlock_irqrestore(ap
->lock
, flags
);
5857 /* Final freeze & EH. All in-flight commands are aborted. EH
5858 * will be skipped and retrials will be terminated with bad
5861 spin_lock_irqsave(ap
->lock
, flags
);
5862 ata_port_freeze(ap
); /* won't be thawed */
5863 spin_unlock_irqrestore(ap
->lock
, flags
);
5865 ata_port_wait_eh(ap
);
5867 /* Flush hotplug task. The sequence is similar to
5868 * ata_port_flush_task().
5870 flush_workqueue(ata_aux_wq
);
5871 cancel_delayed_work(&ap
->hotplug_task
);
5872 flush_workqueue(ata_aux_wq
);
5875 /* remove the associated SCSI host */
5876 scsi_remove_host(ap
->scsi_host
);
5880 * ata_host_detach - Detach all ports of an ATA host
5881 * @host: Host to detach
5883 * Detach all ports of @host.
5886 * Kernel thread context (may sleep).
5888 void ata_host_detach(struct ata_host
*host
)
5892 for (i
= 0; i
< host
->n_ports
; i
++)
5893 ata_port_detach(host
->ports
[i
]);
5896 struct ata_probe_ent
*
5897 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
5899 struct ata_probe_ent
*probe_ent
;
5901 /* XXX - the following if can go away once all LLDs are managed */
5902 if (!list_empty(&dev
->devres_head
))
5903 probe_ent
= devm_kzalloc(dev
, sizeof(*probe_ent
), GFP_KERNEL
);
5905 probe_ent
= kzalloc(sizeof(*probe_ent
), GFP_KERNEL
);
5907 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
5908 kobject_name(&(dev
->kobj
)));
5912 INIT_LIST_HEAD(&probe_ent
->node
);
5913 probe_ent
->dev
= dev
;
5915 probe_ent
->sht
= port
->sht
;
5916 probe_ent
->port_flags
= port
->flags
;
5917 probe_ent
->pio_mask
= port
->pio_mask
;
5918 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
5919 probe_ent
->udma_mask
= port
->udma_mask
;
5920 probe_ent
->port_ops
= port
->port_ops
;
5921 probe_ent
->private_data
= port
->private_data
;
5927 * ata_std_ports - initialize ioaddr with standard port offsets.
5928 * @ioaddr: IO address structure to be initialized
5930 * Utility function which initializes data_addr, error_addr,
5931 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5932 * device_addr, status_addr, and command_addr to standard offsets
5933 * relative to cmd_addr.
5935 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5938 void ata_std_ports(struct ata_ioports
*ioaddr
)
5940 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
5941 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
5942 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
5943 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
5944 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
5945 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
5946 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
5947 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
5948 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
5949 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
5956 * ata_pci_remove_one - PCI layer callback for device removal
5957 * @pdev: PCI device that was removed
5959 * PCI layer indicates to libata via this hook that hot-unplug or
5960 * module unload event has occurred. Detach all ports. Resource
5961 * release is handled via devres.
5964 * Inherited from PCI layer (may sleep).
5966 void ata_pci_remove_one(struct pci_dev
*pdev
)
5968 struct device
*dev
= pci_dev_to_dev(pdev
);
5969 struct ata_host
*host
= dev_get_drvdata(dev
);
5971 ata_host_detach(host
);
5974 /* move to PCI subsystem */
5975 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5977 unsigned long tmp
= 0;
5979 switch (bits
->width
) {
5982 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5988 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5994 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6005 return (tmp
== bits
->val
) ? 1 : 0;
6008 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6010 pci_save_state(pdev
);
6012 if (mesg
.event
== PM_EVENT_SUSPEND
) {
6013 pci_disable_device(pdev
);
6014 pci_set_power_state(pdev
, PCI_D3hot
);
6018 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6022 pci_set_power_state(pdev
, PCI_D0
);
6023 pci_restore_state(pdev
);
6025 rc
= pcim_enable_device(pdev
);
6027 dev_printk(KERN_ERR
, &pdev
->dev
,
6028 "failed to enable device after resume (%d)\n", rc
);
6032 pci_set_master(pdev
);
6036 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6038 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6041 rc
= ata_host_suspend(host
, mesg
);
6045 ata_pci_device_do_suspend(pdev
, mesg
);
6050 int ata_pci_device_resume(struct pci_dev
*pdev
)
6052 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6055 rc
= ata_pci_device_do_resume(pdev
);
6057 ata_host_resume(host
);
6060 #endif /* CONFIG_PCI */
6063 static int __init
ata_init(void)
6065 ata_probe_timeout
*= HZ
;
6066 ata_wq
= create_workqueue("ata");
6070 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6072 destroy_workqueue(ata_wq
);
6076 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6080 static void __exit
ata_exit(void)
6082 destroy_workqueue(ata_wq
);
6083 destroy_workqueue(ata_aux_wq
);
6086 subsys_initcall(ata_init
);
6087 module_exit(ata_exit
);
6089 static unsigned long ratelimit_time
;
6090 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6092 int ata_ratelimit(void)
6095 unsigned long flags
;
6097 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6099 if (time_after(jiffies
, ratelimit_time
)) {
6101 ratelimit_time
= jiffies
+ (HZ
/5);
6105 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6111 * ata_wait_register - wait until register value changes
6112 * @reg: IO-mapped register
6113 * @mask: Mask to apply to read register value
6114 * @val: Wait condition
6115 * @interval_msec: polling interval in milliseconds
6116 * @timeout_msec: timeout in milliseconds
6118 * Waiting for some bits of register to change is a common
6119 * operation for ATA controllers. This function reads 32bit LE
6120 * IO-mapped register @reg and tests for the following condition.
6122 * (*@reg & mask) != val
6124 * If the condition is met, it returns; otherwise, the process is
6125 * repeated after @interval_msec until timeout.
6128 * Kernel thread context (may sleep)
6131 * The final register value.
6133 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6134 unsigned long interval_msec
,
6135 unsigned long timeout_msec
)
6137 unsigned long timeout
;
6140 tmp
= ioread32(reg
);
6142 /* Calculate timeout _after_ the first read to make sure
6143 * preceding writes reach the controller before starting to
6144 * eat away the timeout.
6146 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6148 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6149 msleep(interval_msec
);
6150 tmp
= ioread32(reg
);
6159 static void ata_dummy_noret(struct ata_port
*ap
) { }
6160 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6161 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6163 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6168 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6170 return AC_ERR_SYSTEM
;
6173 const struct ata_port_operations ata_dummy_port_ops
= {
6174 .port_disable
= ata_port_disable
,
6175 .check_status
= ata_dummy_check_status
,
6176 .check_altstatus
= ata_dummy_check_status
,
6177 .dev_select
= ata_noop_dev_select
,
6178 .qc_prep
= ata_noop_qc_prep
,
6179 .qc_issue
= ata_dummy_qc_issue
,
6180 .freeze
= ata_dummy_noret
,
6181 .thaw
= ata_dummy_noret
,
6182 .error_handler
= ata_dummy_noret
,
6183 .post_internal_cmd
= ata_dummy_qc_noret
,
6184 .irq_clear
= ata_dummy_noret
,
6185 .port_start
= ata_dummy_ret0
,
6186 .port_stop
= ata_dummy_noret
,
6190 * libata is essentially a library of internal helper functions for
6191 * low-level ATA host controller drivers. As such, the API/ABI is
6192 * likely to change as new drivers are added and updated.
6193 * Do not depend on ABI/API stability.
6196 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6197 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6198 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6199 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6200 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6201 EXPORT_SYMBOL_GPL(ata_std_ports
);
6202 EXPORT_SYMBOL_GPL(ata_host_init
);
6203 EXPORT_SYMBOL_GPL(ata_device_add
);
6204 EXPORT_SYMBOL_GPL(ata_host_detach
);
6205 EXPORT_SYMBOL_GPL(ata_sg_init
);
6206 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6207 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6208 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6209 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6210 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6211 EXPORT_SYMBOL_GPL(ata_tf_load
);
6212 EXPORT_SYMBOL_GPL(ata_tf_read
);
6213 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6214 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6215 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6216 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6217 EXPORT_SYMBOL_GPL(ata_check_status
);
6218 EXPORT_SYMBOL_GPL(ata_altstatus
);
6219 EXPORT_SYMBOL_GPL(ata_exec_command
);
6220 EXPORT_SYMBOL_GPL(ata_port_start
);
6221 EXPORT_SYMBOL_GPL(ata_interrupt
);
6222 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6223 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6224 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6225 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6226 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6227 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6228 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6229 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6230 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6231 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6232 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6233 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6234 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6235 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6236 EXPORT_SYMBOL_GPL(ata_port_probe
);
6237 EXPORT_SYMBOL_GPL(sata_set_spd
);
6238 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6239 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6240 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6241 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6242 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6243 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6244 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6245 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6246 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6247 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6248 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6249 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6250 EXPORT_SYMBOL_GPL(ata_port_disable
);
6251 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6252 EXPORT_SYMBOL_GPL(ata_wait_register
);
6253 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6254 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6255 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6256 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6257 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6258 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6259 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6260 EXPORT_SYMBOL_GPL(ata_host_intr
);
6261 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6262 EXPORT_SYMBOL_GPL(sata_scr_read
);
6263 EXPORT_SYMBOL_GPL(sata_scr_write
);
6264 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6265 EXPORT_SYMBOL_GPL(ata_port_online
);
6266 EXPORT_SYMBOL_GPL(ata_port_offline
);
6267 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6268 EXPORT_SYMBOL_GPL(ata_host_resume
);
6269 EXPORT_SYMBOL_GPL(ata_id_string
);
6270 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6271 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6272 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6274 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6275 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6276 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6279 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6280 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
6281 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6282 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6283 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6284 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6285 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6286 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6287 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6288 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6289 #endif /* CONFIG_PCI */
6291 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6292 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6294 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6295 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6296 EXPORT_SYMBOL_GPL(ata_port_abort
);
6297 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6298 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6299 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6300 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6301 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6302 EXPORT_SYMBOL_GPL(ata_do_eh
);
6303 EXPORT_SYMBOL_GPL(ata_irq_on
);
6304 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6305 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6306 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);