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 "2.21" /* 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
);
74 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
76 unsigned int ata_print_id
= 1;
77 static struct workqueue_struct
*ata_wq
;
79 struct workqueue_struct
*ata_aux_wq
;
81 int atapi_enabled
= 1;
82 module_param(atapi_enabled
, int, 0444);
83 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
86 module_param(atapi_dmadir
, int, 0444);
87 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
90 module_param_named(fua
, libata_fua
, int, 0444);
91 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
93 static int ata_ignore_hpa
= 0;
94 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
95 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
97 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
98 module_param(ata_probe_timeout
, int, 0444);
99 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
101 int libata_noacpi
= 1;
102 module_param_named(noacpi
, libata_noacpi
, int, 0444);
103 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
105 MODULE_AUTHOR("Jeff Garzik");
106 MODULE_DESCRIPTION("Library module for ATA devices");
107 MODULE_LICENSE("GPL");
108 MODULE_VERSION(DRV_VERSION
);
112 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
113 * @tf: Taskfile to convert
114 * @fis: Buffer into which data will output
115 * @pmp: Port multiplier port
117 * Converts a standard ATA taskfile to a Serial ATA
118 * FIS structure (Register - Host to Device).
121 * Inherited from caller.
124 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
126 fis
[0] = 0x27; /* Register - Host to Device FIS */
127 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
128 bit 7 indicates Command FIS */
129 fis
[2] = tf
->command
;
130 fis
[3] = tf
->feature
;
137 fis
[8] = tf
->hob_lbal
;
138 fis
[9] = tf
->hob_lbam
;
139 fis
[10] = tf
->hob_lbah
;
140 fis
[11] = tf
->hob_feature
;
143 fis
[13] = tf
->hob_nsect
;
154 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
155 * @fis: Buffer from which data will be input
156 * @tf: Taskfile to output
158 * Converts a serial ATA FIS structure to a standard ATA taskfile.
161 * Inherited from caller.
164 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
166 tf
->command
= fis
[2]; /* status */
167 tf
->feature
= fis
[3]; /* error */
174 tf
->hob_lbal
= fis
[8];
175 tf
->hob_lbam
= fis
[9];
176 tf
->hob_lbah
= fis
[10];
179 tf
->hob_nsect
= fis
[13];
182 static const u8 ata_rw_cmds
[] = {
186 ATA_CMD_READ_MULTI_EXT
,
187 ATA_CMD_WRITE_MULTI_EXT
,
191 ATA_CMD_WRITE_MULTI_FUA_EXT
,
195 ATA_CMD_PIO_READ_EXT
,
196 ATA_CMD_PIO_WRITE_EXT
,
209 ATA_CMD_WRITE_FUA_EXT
213 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
214 * @tf: command to examine and configure
215 * @dev: device tf belongs to
217 * Examine the device configuration and tf->flags to calculate
218 * the proper read/write commands and protocol to use.
223 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
227 int index
, fua
, lba48
, write
;
229 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
230 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
231 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
233 if (dev
->flags
& ATA_DFLAG_PIO
) {
234 tf
->protocol
= ATA_PROT_PIO
;
235 index
= dev
->multi_count
? 0 : 8;
236 } else if (lba48
&& (dev
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
237 /* Unable to use DMA due to host limitation */
238 tf
->protocol
= ATA_PROT_PIO
;
239 index
= dev
->multi_count
? 0 : 8;
241 tf
->protocol
= ATA_PROT_DMA
;
245 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
254 * ata_tf_read_block - Read block address from ATA taskfile
255 * @tf: ATA taskfile of interest
256 * @dev: ATA device @tf belongs to
261 * Read block address from @tf. This function can handle all
262 * three address formats - LBA, LBA48 and CHS. tf->protocol and
263 * flags select the address format to use.
266 * Block address read from @tf.
268 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
272 if (tf
->flags
& ATA_TFLAG_LBA
) {
273 if (tf
->flags
& ATA_TFLAG_LBA48
) {
274 block
|= (u64
)tf
->hob_lbah
<< 40;
275 block
|= (u64
)tf
->hob_lbam
<< 32;
276 block
|= tf
->hob_lbal
<< 24;
278 block
|= (tf
->device
& 0xf) << 24;
280 block
|= tf
->lbah
<< 16;
281 block
|= tf
->lbam
<< 8;
286 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
287 head
= tf
->device
& 0xf;
290 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
297 * ata_build_rw_tf - Build ATA taskfile for given read/write request
298 * @tf: Target ATA taskfile
299 * @dev: ATA device @tf belongs to
300 * @block: Block address
301 * @n_block: Number of blocks
302 * @tf_flags: RW/FUA etc...
308 * Build ATA taskfile @tf for read/write request described by
309 * @block, @n_block, @tf_flags and @tag on @dev.
313 * 0 on success, -ERANGE if the request is too large for @dev,
314 * -EINVAL if the request is invalid.
316 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
317 u64 block
, u32 n_block
, unsigned int tf_flags
,
320 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
321 tf
->flags
|= tf_flags
;
323 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
325 if (!lba_48_ok(block
, n_block
))
328 tf
->protocol
= ATA_PROT_NCQ
;
329 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
331 if (tf
->flags
& ATA_TFLAG_WRITE
)
332 tf
->command
= ATA_CMD_FPDMA_WRITE
;
334 tf
->command
= ATA_CMD_FPDMA_READ
;
336 tf
->nsect
= tag
<< 3;
337 tf
->hob_feature
= (n_block
>> 8) & 0xff;
338 tf
->feature
= n_block
& 0xff;
340 tf
->hob_lbah
= (block
>> 40) & 0xff;
341 tf
->hob_lbam
= (block
>> 32) & 0xff;
342 tf
->hob_lbal
= (block
>> 24) & 0xff;
343 tf
->lbah
= (block
>> 16) & 0xff;
344 tf
->lbam
= (block
>> 8) & 0xff;
345 tf
->lbal
= block
& 0xff;
348 if (tf
->flags
& ATA_TFLAG_FUA
)
349 tf
->device
|= 1 << 7;
350 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
351 tf
->flags
|= ATA_TFLAG_LBA
;
353 if (lba_28_ok(block
, n_block
)) {
355 tf
->device
|= (block
>> 24) & 0xf;
356 } else if (lba_48_ok(block
, n_block
)) {
357 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
361 tf
->flags
|= ATA_TFLAG_LBA48
;
363 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
365 tf
->hob_lbah
= (block
>> 40) & 0xff;
366 tf
->hob_lbam
= (block
>> 32) & 0xff;
367 tf
->hob_lbal
= (block
>> 24) & 0xff;
369 /* request too large even for LBA48 */
372 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
375 tf
->nsect
= n_block
& 0xff;
377 tf
->lbah
= (block
>> 16) & 0xff;
378 tf
->lbam
= (block
>> 8) & 0xff;
379 tf
->lbal
= block
& 0xff;
381 tf
->device
|= ATA_LBA
;
384 u32 sect
, head
, cyl
, track
;
386 /* The request -may- be too large for CHS addressing. */
387 if (!lba_28_ok(block
, n_block
))
390 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
393 /* Convert LBA to CHS */
394 track
= (u32
)block
/ dev
->sectors
;
395 cyl
= track
/ dev
->heads
;
396 head
= track
% dev
->heads
;
397 sect
= (u32
)block
% dev
->sectors
+ 1;
399 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
400 (u32
)block
, track
, cyl
, head
, sect
);
402 /* Check whether the converted CHS can fit.
406 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
409 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
420 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
421 * @pio_mask: pio_mask
422 * @mwdma_mask: mwdma_mask
423 * @udma_mask: udma_mask
425 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
426 * unsigned int xfer_mask.
434 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
435 unsigned int mwdma_mask
,
436 unsigned int udma_mask
)
438 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
439 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
440 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
444 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
445 * @xfer_mask: xfer_mask to unpack
446 * @pio_mask: resulting pio_mask
447 * @mwdma_mask: resulting mwdma_mask
448 * @udma_mask: resulting udma_mask
450 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
451 * Any NULL distination masks will be ignored.
453 static void ata_unpack_xfermask(unsigned int xfer_mask
,
454 unsigned int *pio_mask
,
455 unsigned int *mwdma_mask
,
456 unsigned int *udma_mask
)
459 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
461 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
463 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
466 static const struct ata_xfer_ent
{
470 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
471 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
472 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
477 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
478 * @xfer_mask: xfer_mask of interest
480 * Return matching XFER_* value for @xfer_mask. Only the highest
481 * bit of @xfer_mask is considered.
487 * Matching XFER_* value, 0 if no match found.
489 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
491 int highbit
= fls(xfer_mask
) - 1;
492 const struct ata_xfer_ent
*ent
;
494 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
495 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
496 return ent
->base
+ highbit
- ent
->shift
;
501 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
502 * @xfer_mode: XFER_* of interest
504 * Return matching xfer_mask for @xfer_mode.
510 * Matching xfer_mask, 0 if no match found.
512 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
514 const struct ata_xfer_ent
*ent
;
516 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
517 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
518 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
523 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
524 * @xfer_mode: XFER_* of interest
526 * Return matching xfer_shift for @xfer_mode.
532 * Matching xfer_shift, -1 if no match found.
534 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
536 const struct ata_xfer_ent
*ent
;
538 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
539 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
545 * ata_mode_string - convert xfer_mask to string
546 * @xfer_mask: mask of bits supported; only highest bit counts.
548 * Determine string which represents the highest speed
549 * (highest bit in @modemask).
555 * Constant C string representing highest speed listed in
556 * @mode_mask, or the constant C string "<n/a>".
558 static const char *ata_mode_string(unsigned int xfer_mask
)
560 static const char * const xfer_mode_str
[] = {
584 highbit
= fls(xfer_mask
) - 1;
585 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
586 return xfer_mode_str
[highbit
];
590 static const char *sata_spd_string(unsigned int spd
)
592 static const char * const spd_str
[] = {
597 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
599 return spd_str
[spd
- 1];
602 void ata_dev_disable(struct ata_device
*dev
)
604 if (ata_dev_enabled(dev
)) {
605 if (ata_msg_drv(dev
->ap
))
606 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
607 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
614 * ata_devchk - PATA device presence detection
615 * @ap: ATA channel to examine
616 * @device: Device to examine (starting at zero)
618 * This technique was originally described in
619 * Hale Landis's ATADRVR (www.ata-atapi.com), and
620 * later found its way into the ATA/ATAPI spec.
622 * Write a pattern to the ATA shadow registers,
623 * and if a device is present, it will respond by
624 * correctly storing and echoing back the
625 * ATA shadow register contents.
631 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
633 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
636 ap
->ops
->dev_select(ap
, device
);
638 iowrite8(0x55, ioaddr
->nsect_addr
);
639 iowrite8(0xaa, ioaddr
->lbal_addr
);
641 iowrite8(0xaa, ioaddr
->nsect_addr
);
642 iowrite8(0x55, ioaddr
->lbal_addr
);
644 iowrite8(0x55, ioaddr
->nsect_addr
);
645 iowrite8(0xaa, ioaddr
->lbal_addr
);
647 nsect
= ioread8(ioaddr
->nsect_addr
);
648 lbal
= ioread8(ioaddr
->lbal_addr
);
650 if ((nsect
== 0x55) && (lbal
== 0xaa))
651 return 1; /* we found a device */
653 return 0; /* nothing found */
657 * ata_dev_classify - determine device type based on ATA-spec signature
658 * @tf: ATA taskfile register set for device to be identified
660 * Determine from taskfile register contents whether a device is
661 * ATA or ATAPI, as per "Signature and persistence" section
662 * of ATA/PI spec (volume 1, sect 5.14).
668 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
669 * the event of failure.
672 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
674 /* Apple's open source Darwin code hints that some devices only
675 * put a proper signature into the LBA mid/high registers,
676 * So, we only check those. It's sufficient for uniqueness.
679 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
680 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
681 DPRINTK("found ATA device by sig\n");
685 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
686 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
687 DPRINTK("found ATAPI device by sig\n");
688 return ATA_DEV_ATAPI
;
691 DPRINTK("unknown device\n");
692 return ATA_DEV_UNKNOWN
;
696 * ata_dev_try_classify - Parse returned ATA device signature
697 * @ap: ATA channel to examine
698 * @device: Device to examine (starting at zero)
699 * @r_err: Value of error register on completion
701 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
702 * an ATA/ATAPI-defined set of values is placed in the ATA
703 * shadow registers, indicating the results of device detection
706 * Select the ATA device, and read the values from the ATA shadow
707 * registers. Then parse according to the Error register value,
708 * and the spec-defined values examined by ata_dev_classify().
714 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
718 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
720 struct ata_taskfile tf
;
724 ap
->ops
->dev_select(ap
, device
);
726 memset(&tf
, 0, sizeof(tf
));
728 ap
->ops
->tf_read(ap
, &tf
);
733 /* see if device passed diags: if master then continue and warn later */
734 if (err
== 0 && device
== 0)
735 /* diagnostic fail : do nothing _YET_ */
736 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
739 else if ((device
== 0) && (err
== 0x81))
744 /* determine if device is ATA or ATAPI */
745 class = ata_dev_classify(&tf
);
747 if (class == ATA_DEV_UNKNOWN
)
749 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
755 * ata_id_string - Convert IDENTIFY DEVICE page into string
756 * @id: IDENTIFY DEVICE results we will examine
757 * @s: string into which data is output
758 * @ofs: offset into identify device page
759 * @len: length of string to return. must be an even number.
761 * The strings in the IDENTIFY DEVICE page are broken up into
762 * 16-bit chunks. Run through the string, and output each
763 * 8-bit chunk linearly, regardless of platform.
769 void ata_id_string(const u16
*id
, unsigned char *s
,
770 unsigned int ofs
, unsigned int len
)
789 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
790 * @id: IDENTIFY DEVICE results we will examine
791 * @s: string into which data is output
792 * @ofs: offset into identify device page
793 * @len: length of string to return. must be an odd number.
795 * This function is identical to ata_id_string except that it
796 * trims trailing spaces and terminates the resulting string with
797 * null. @len must be actual maximum length (even number) + 1.
802 void ata_id_c_string(const u16
*id
, unsigned char *s
,
803 unsigned int ofs
, unsigned int len
)
809 ata_id_string(id
, s
, ofs
, len
- 1);
811 p
= s
+ strnlen(s
, len
- 1);
812 while (p
> s
&& p
[-1] == ' ')
817 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
821 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
822 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
823 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
824 sectors
|= (tf
->lbah
& 0xff) << 16;
825 sectors
|= (tf
->lbam
& 0xff) << 8;
826 sectors
|= (tf
->lbal
& 0xff);
831 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
835 sectors
|= (tf
->device
& 0x0f) << 24;
836 sectors
|= (tf
->lbah
& 0xff) << 16;
837 sectors
|= (tf
->lbam
& 0xff) << 8;
838 sectors
|= (tf
->lbal
& 0xff);
844 * ata_read_native_max_address_ext - LBA48 native max query
845 * @dev: Device to query
847 * Perform an LBA48 size query upon the device in question. Return the
848 * actual LBA48 size or zero if the command fails.
851 static u64
ata_read_native_max_address_ext(struct ata_device
*dev
)
854 struct ata_taskfile tf
;
856 ata_tf_init(dev
, &tf
);
858 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
859 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
860 tf
.protocol
|= ATA_PROT_NODATA
;
863 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
867 return ata_tf_to_lba48(&tf
);
871 * ata_read_native_max_address - LBA28 native max query
872 * @dev: Device to query
874 * Performa an LBA28 size query upon the device in question. Return the
875 * actual LBA28 size or zero if the command fails.
878 static u64
ata_read_native_max_address(struct ata_device
*dev
)
881 struct ata_taskfile tf
;
883 ata_tf_init(dev
, &tf
);
885 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
886 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
887 tf
.protocol
|= ATA_PROT_NODATA
;
890 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
894 return ata_tf_to_lba(&tf
);
898 * ata_set_native_max_address_ext - LBA48 native max set
899 * @dev: Device to query
900 * @new_sectors: new max sectors value to set for the device
902 * Perform an LBA48 size set max upon the device in question. Return the
903 * actual LBA48 size or zero if the command fails.
906 static u64
ata_set_native_max_address_ext(struct ata_device
*dev
, u64 new_sectors
)
909 struct ata_taskfile tf
;
913 ata_tf_init(dev
, &tf
);
915 tf
.command
= ATA_CMD_SET_MAX_EXT
;
916 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
917 tf
.protocol
|= ATA_PROT_NODATA
;
920 tf
.lbal
= (new_sectors
>> 0) & 0xff;
921 tf
.lbam
= (new_sectors
>> 8) & 0xff;
922 tf
.lbah
= (new_sectors
>> 16) & 0xff;
924 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
925 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
926 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
928 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
932 return ata_tf_to_lba48(&tf
);
936 * ata_set_native_max_address - LBA28 native max set
937 * @dev: Device to query
938 * @new_sectors: new max sectors value to set for the device
940 * Perform an LBA28 size set max upon the device in question. Return the
941 * actual LBA28 size or zero if the command fails.
944 static u64
ata_set_native_max_address(struct ata_device
*dev
, u64 new_sectors
)
947 struct ata_taskfile tf
;
951 ata_tf_init(dev
, &tf
);
953 tf
.command
= ATA_CMD_SET_MAX
;
954 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
955 tf
.protocol
|= ATA_PROT_NODATA
;
957 tf
.lbal
= (new_sectors
>> 0) & 0xff;
958 tf
.lbam
= (new_sectors
>> 8) & 0xff;
959 tf
.lbah
= (new_sectors
>> 16) & 0xff;
960 tf
.device
|= ((new_sectors
>> 24) & 0x0f) | 0x40;
962 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
966 return ata_tf_to_lba(&tf
);
970 * ata_hpa_resize - Resize a device with an HPA set
971 * @dev: Device to resize
973 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
974 * it if required to the full size of the media. The caller must check
975 * the drive has the HPA feature set enabled.
978 static u64
ata_hpa_resize(struct ata_device
*dev
)
980 u64 sectors
= dev
->n_sectors
;
983 if (ata_id_has_lba48(dev
->id
))
984 hpa_sectors
= ata_read_native_max_address_ext(dev
);
986 hpa_sectors
= ata_read_native_max_address(dev
);
988 if (hpa_sectors
> sectors
) {
989 ata_dev_printk(dev
, KERN_INFO
,
990 "Host Protected Area detected:\n"
991 "\tcurrent size: %lld sectors\n"
992 "\tnative size: %lld sectors\n",
993 (long long)sectors
, (long long)hpa_sectors
);
995 if (ata_ignore_hpa
) {
996 if (ata_id_has_lba48(dev
->id
))
997 hpa_sectors
= ata_set_native_max_address_ext(dev
, hpa_sectors
);
999 hpa_sectors
= ata_set_native_max_address(dev
,
1003 ata_dev_printk(dev
, KERN_INFO
, "native size "
1004 "increased to %lld sectors\n",
1005 (long long)hpa_sectors
);
1009 } else if (hpa_sectors
< sectors
)
1010 ata_dev_printk(dev
, KERN_WARNING
, "%s 1: hpa sectors (%lld) "
1011 "is smaller than sectors (%lld)\n", __FUNCTION__
,
1012 (long long)hpa_sectors
, (long long)sectors
);
1017 static u64
ata_id_n_sectors(const u16
*id
)
1019 if (ata_id_has_lba(id
)) {
1020 if (ata_id_has_lba48(id
))
1021 return ata_id_u64(id
, 100);
1023 return ata_id_u32(id
, 60);
1025 if (ata_id_current_chs_valid(id
))
1026 return ata_id_u32(id
, 57);
1028 return id
[1] * id
[3] * id
[6];
1033 * ata_id_to_dma_mode - Identify DMA mode from id block
1034 * @dev: device to identify
1035 * @unknown: mode to assume if we cannot tell
1037 * Set up the timing values for the device based upon the identify
1038 * reported values for the DMA mode. This function is used by drivers
1039 * which rely upon firmware configured modes, but wish to report the
1040 * mode correctly when possible.
1042 * In addition we emit similarly formatted messages to the default
1043 * ata_dev_set_mode handler, in order to provide consistency of
1047 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1052 /* Pack the DMA modes */
1053 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1054 if (dev
->id
[53] & 0x04)
1055 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1057 /* Select the mode in use */
1058 mode
= ata_xfer_mask2mode(mask
);
1061 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1062 ata_mode_string(mask
));
1064 /* SWDMA perhaps ? */
1066 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1069 /* Configure the device reporting */
1070 dev
->xfer_mode
= mode
;
1071 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1075 * ata_noop_dev_select - Select device 0/1 on ATA bus
1076 * @ap: ATA channel to manipulate
1077 * @device: ATA device (numbered from zero) to select
1079 * This function performs no actual function.
1081 * May be used as the dev_select() entry in ata_port_operations.
1086 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1092 * ata_std_dev_select - Select device 0/1 on ATA bus
1093 * @ap: ATA channel to manipulate
1094 * @device: ATA device (numbered from zero) to select
1096 * Use the method defined in the ATA specification to
1097 * make either device 0, or device 1, active on the
1098 * ATA channel. Works with both PIO and MMIO.
1100 * May be used as the dev_select() entry in ata_port_operations.
1106 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1111 tmp
= ATA_DEVICE_OBS
;
1113 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1115 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1116 ata_pause(ap
); /* needed; also flushes, for mmio */
1120 * ata_dev_select - Select device 0/1 on ATA bus
1121 * @ap: ATA channel to manipulate
1122 * @device: ATA device (numbered from zero) to select
1123 * @wait: non-zero to wait for Status register BSY bit to clear
1124 * @can_sleep: non-zero if context allows sleeping
1126 * Use the method defined in the ATA specification to
1127 * make either device 0, or device 1, active on the
1130 * This is a high-level version of ata_std_dev_select(),
1131 * which additionally provides the services of inserting
1132 * the proper pauses and status polling, where needed.
1138 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1139 unsigned int wait
, unsigned int can_sleep
)
1141 if (ata_msg_probe(ap
))
1142 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1143 "device %u, wait %u\n", device
, wait
);
1148 ap
->ops
->dev_select(ap
, device
);
1151 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1158 * ata_dump_id - IDENTIFY DEVICE info debugging output
1159 * @id: IDENTIFY DEVICE page to dump
1161 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1168 static inline void ata_dump_id(const u16
*id
)
1170 DPRINTK("49==0x%04x "
1180 DPRINTK("80==0x%04x "
1190 DPRINTK("88==0x%04x "
1197 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1198 * @id: IDENTIFY data to compute xfer mask from
1200 * Compute the xfermask for this device. This is not as trivial
1201 * as it seems if we must consider early devices correctly.
1203 * FIXME: pre IDE drive timing (do we care ?).
1211 static unsigned int ata_id_xfermask(const u16
*id
)
1213 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1215 /* Usual case. Word 53 indicates word 64 is valid */
1216 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1217 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1221 /* If word 64 isn't valid then Word 51 high byte holds
1222 * the PIO timing number for the maximum. Turn it into
1225 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1226 if (mode
< 5) /* Valid PIO range */
1227 pio_mask
= (2 << mode
) - 1;
1231 /* But wait.. there's more. Design your standards by
1232 * committee and you too can get a free iordy field to
1233 * process. However its the speeds not the modes that
1234 * are supported... Note drivers using the timing API
1235 * will get this right anyway
1239 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1241 if (ata_id_is_cfa(id
)) {
1243 * Process compact flash extended modes
1245 int pio
= id
[163] & 0x7;
1246 int dma
= (id
[163] >> 3) & 7;
1249 pio_mask
|= (1 << 5);
1251 pio_mask
|= (1 << 6);
1253 mwdma_mask
|= (1 << 3);
1255 mwdma_mask
|= (1 << 4);
1259 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1260 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1262 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1266 * ata_port_queue_task - Queue port_task
1267 * @ap: The ata_port to queue port_task for
1268 * @fn: workqueue function to be scheduled
1269 * @data: data for @fn to use
1270 * @delay: delay time for workqueue function
1272 * Schedule @fn(@data) for execution after @delay jiffies using
1273 * port_task. There is one port_task per port and it's the
1274 * user(low level driver)'s responsibility to make sure that only
1275 * one task is active at any given time.
1277 * libata core layer takes care of synchronization between
1278 * port_task and EH. ata_port_queue_task() may be ignored for EH
1282 * Inherited from caller.
1284 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1285 unsigned long delay
)
1287 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1288 ap
->port_task_data
= data
;
1290 /* may fail if ata_port_flush_task() in progress */
1291 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1295 * ata_port_flush_task - Flush port_task
1296 * @ap: The ata_port to flush port_task for
1298 * After this function completes, port_task is guranteed not to
1299 * be running or scheduled.
1302 * Kernel thread context (may sleep)
1304 void ata_port_flush_task(struct ata_port
*ap
)
1308 cancel_rearming_delayed_work(&ap
->port_task
);
1310 if (ata_msg_ctl(ap
))
1311 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1314 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1316 struct completion
*waiting
= qc
->private_data
;
1322 * ata_exec_internal_sg - execute libata internal command
1323 * @dev: Device to which the command is sent
1324 * @tf: Taskfile registers for the command and the result
1325 * @cdb: CDB for packet command
1326 * @dma_dir: Data tranfer direction of the command
1327 * @sg: sg list for the data buffer of the command
1328 * @n_elem: Number of sg entries
1330 * Executes libata internal command with timeout. @tf contains
1331 * command on entry and result on return. Timeout and error
1332 * conditions are reported via return value. No recovery action
1333 * is taken after a command times out. It's caller's duty to
1334 * clean up after timeout.
1337 * None. Should be called with kernel context, might sleep.
1340 * Zero on success, AC_ERR_* mask on failure
1342 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1343 struct ata_taskfile
*tf
, const u8
*cdb
,
1344 int dma_dir
, struct scatterlist
*sg
,
1345 unsigned int n_elem
)
1347 struct ata_port
*ap
= dev
->ap
;
1348 u8 command
= tf
->command
;
1349 struct ata_queued_cmd
*qc
;
1350 unsigned int tag
, preempted_tag
;
1351 u32 preempted_sactive
, preempted_qc_active
;
1352 DECLARE_COMPLETION_ONSTACK(wait
);
1353 unsigned long flags
;
1354 unsigned int err_mask
;
1357 spin_lock_irqsave(ap
->lock
, flags
);
1359 /* no internal command while frozen */
1360 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1361 spin_unlock_irqrestore(ap
->lock
, flags
);
1362 return AC_ERR_SYSTEM
;
1365 /* initialize internal qc */
1367 /* XXX: Tag 0 is used for drivers with legacy EH as some
1368 * drivers choke if any other tag is given. This breaks
1369 * ata_tag_internal() test for those drivers. Don't use new
1370 * EH stuff without converting to it.
1372 if (ap
->ops
->error_handler
)
1373 tag
= ATA_TAG_INTERNAL
;
1377 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1379 qc
= __ata_qc_from_tag(ap
, tag
);
1387 preempted_tag
= ap
->active_tag
;
1388 preempted_sactive
= ap
->sactive
;
1389 preempted_qc_active
= ap
->qc_active
;
1390 ap
->active_tag
= ATA_TAG_POISON
;
1394 /* prepare & issue qc */
1397 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1398 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1399 qc
->dma_dir
= dma_dir
;
1400 if (dma_dir
!= DMA_NONE
) {
1401 unsigned int i
, buflen
= 0;
1403 for (i
= 0; i
< n_elem
; i
++)
1404 buflen
+= sg
[i
].length
;
1406 ata_sg_init(qc
, sg
, n_elem
);
1407 qc
->nbytes
= buflen
;
1410 qc
->private_data
= &wait
;
1411 qc
->complete_fn
= ata_qc_complete_internal
;
1415 spin_unlock_irqrestore(ap
->lock
, flags
);
1417 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1419 ata_port_flush_task(ap
);
1422 spin_lock_irqsave(ap
->lock
, flags
);
1424 /* We're racing with irq here. If we lose, the
1425 * following test prevents us from completing the qc
1426 * twice. If we win, the port is frozen and will be
1427 * cleaned up by ->post_internal_cmd().
1429 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1430 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1432 if (ap
->ops
->error_handler
)
1433 ata_port_freeze(ap
);
1435 ata_qc_complete(qc
);
1437 if (ata_msg_warn(ap
))
1438 ata_dev_printk(dev
, KERN_WARNING
,
1439 "qc timeout (cmd 0x%x)\n", command
);
1442 spin_unlock_irqrestore(ap
->lock
, flags
);
1445 /* do post_internal_cmd */
1446 if (ap
->ops
->post_internal_cmd
)
1447 ap
->ops
->post_internal_cmd(qc
);
1449 /* perform minimal error analysis */
1450 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1451 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1452 qc
->err_mask
|= AC_ERR_DEV
;
1455 qc
->err_mask
|= AC_ERR_OTHER
;
1457 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1458 qc
->err_mask
&= ~AC_ERR_OTHER
;
1462 spin_lock_irqsave(ap
->lock
, flags
);
1464 *tf
= qc
->result_tf
;
1465 err_mask
= qc
->err_mask
;
1468 ap
->active_tag
= preempted_tag
;
1469 ap
->sactive
= preempted_sactive
;
1470 ap
->qc_active
= preempted_qc_active
;
1472 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1473 * Until those drivers are fixed, we detect the condition
1474 * here, fail the command with AC_ERR_SYSTEM and reenable the
1477 * Note that this doesn't change any behavior as internal
1478 * command failure results in disabling the device in the
1479 * higher layer for LLDDs without new reset/EH callbacks.
1481 * Kill the following code as soon as those drivers are fixed.
1483 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1484 err_mask
|= AC_ERR_SYSTEM
;
1488 spin_unlock_irqrestore(ap
->lock
, flags
);
1494 * ata_exec_internal - execute libata internal command
1495 * @dev: Device to which the command is sent
1496 * @tf: Taskfile registers for the command and the result
1497 * @cdb: CDB for packet command
1498 * @dma_dir: Data tranfer direction of the command
1499 * @buf: Data buffer of the command
1500 * @buflen: Length of data buffer
1502 * Wrapper around ata_exec_internal_sg() which takes simple
1503 * buffer instead of sg list.
1506 * None. Should be called with kernel context, might sleep.
1509 * Zero on success, AC_ERR_* mask on failure
1511 unsigned ata_exec_internal(struct ata_device
*dev
,
1512 struct ata_taskfile
*tf
, const u8
*cdb
,
1513 int dma_dir
, void *buf
, unsigned int buflen
)
1515 struct scatterlist
*psg
= NULL
, sg
;
1516 unsigned int n_elem
= 0;
1518 if (dma_dir
!= DMA_NONE
) {
1520 sg_init_one(&sg
, buf
, buflen
);
1525 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1529 * ata_do_simple_cmd - execute simple internal command
1530 * @dev: Device to which the command is sent
1531 * @cmd: Opcode to execute
1533 * Execute a 'simple' command, that only consists of the opcode
1534 * 'cmd' itself, without filling any other registers
1537 * Kernel thread context (may sleep).
1540 * Zero on success, AC_ERR_* mask on failure
1542 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1544 struct ata_taskfile tf
;
1546 ata_tf_init(dev
, &tf
);
1549 tf
.flags
|= ATA_TFLAG_DEVICE
;
1550 tf
.protocol
= ATA_PROT_NODATA
;
1552 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1556 * ata_pio_need_iordy - check if iordy needed
1559 * Check if the current speed of the device requires IORDY. Used
1560 * by various controllers for chip configuration.
1563 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1565 /* Controller doesn't support IORDY. Probably a pointless check
1566 as the caller should know this */
1567 if (adev
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1569 /* PIO3 and higher it is mandatory */
1570 if (adev
->pio_mode
> XFER_PIO_2
)
1572 /* We turn it on when possible */
1573 if (ata_id_has_iordy(adev
->id
))
1579 * ata_pio_mask_no_iordy - Return the non IORDY mask
1582 * Compute the highest mode possible if we are not using iordy. Return
1583 * -1 if no iordy mode is available.
1586 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1588 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1589 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1590 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1591 /* Is the speed faster than the drive allows non IORDY ? */
1593 /* This is cycle times not frequency - watch the logic! */
1594 if (pio
> 240) /* PIO2 is 240nS per cycle */
1595 return 3 << ATA_SHIFT_PIO
;
1596 return 7 << ATA_SHIFT_PIO
;
1599 return 3 << ATA_SHIFT_PIO
;
1603 * ata_dev_read_id - Read ID data from the specified device
1604 * @dev: target device
1605 * @p_class: pointer to class of the target device (may be changed)
1606 * @flags: ATA_READID_* flags
1607 * @id: buffer to read IDENTIFY data into
1609 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1610 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1611 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1612 * for pre-ATA4 drives.
1615 * Kernel thread context (may sleep)
1618 * 0 on success, -errno otherwise.
1620 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1621 unsigned int flags
, u16
*id
)
1623 struct ata_port
*ap
= dev
->ap
;
1624 unsigned int class = *p_class
;
1625 struct ata_taskfile tf
;
1626 unsigned int err_mask
= 0;
1628 int may_fallback
= 1, tried_spinup
= 0;
1631 if (ata_msg_ctl(ap
))
1632 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1634 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1636 ata_tf_init(dev
, &tf
);
1640 tf
.command
= ATA_CMD_ID_ATA
;
1643 tf
.command
= ATA_CMD_ID_ATAPI
;
1647 reason
= "unsupported class";
1651 tf
.protocol
= ATA_PROT_PIO
;
1653 /* Some devices choke if TF registers contain garbage. Make
1654 * sure those are properly initialized.
1656 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1658 /* Device presence detection is unreliable on some
1659 * controllers. Always poll IDENTIFY if available.
1661 tf
.flags
|= ATA_TFLAG_POLLING
;
1663 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1664 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1666 if (err_mask
& AC_ERR_NODEV_HINT
) {
1667 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1668 ap
->print_id
, dev
->devno
);
1672 /* Device or controller might have reported the wrong
1673 * device class. Give a shot at the other IDENTIFY if
1674 * the current one is aborted by the device.
1677 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1680 if (class == ATA_DEV_ATA
)
1681 class = ATA_DEV_ATAPI
;
1683 class = ATA_DEV_ATA
;
1688 reason
= "I/O error";
1692 /* Falling back doesn't make sense if ID data was read
1693 * successfully at least once.
1697 swap_buf_le16(id
, ATA_ID_WORDS
);
1701 reason
= "device reports invalid type";
1703 if (class == ATA_DEV_ATA
) {
1704 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1707 if (ata_id_is_ata(id
))
1711 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1714 * Drive powered-up in standby mode, and requires a specific
1715 * SET_FEATURES spin-up subcommand before it will accept
1716 * anything other than the original IDENTIFY command.
1718 ata_tf_init(dev
, &tf
);
1719 tf
.command
= ATA_CMD_SET_FEATURES
;
1720 tf
.feature
= SETFEATURES_SPINUP
;
1721 tf
.protocol
= ATA_PROT_NODATA
;
1722 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1723 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1726 reason
= "SPINUP failed";
1730 * If the drive initially returned incomplete IDENTIFY info,
1731 * we now must reissue the IDENTIFY command.
1733 if (id
[2] == 0x37c8)
1737 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1739 * The exact sequence expected by certain pre-ATA4 drives is:
1742 * INITIALIZE DEVICE PARAMETERS
1744 * Some drives were very specific about that exact sequence.
1746 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1747 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1750 reason
= "INIT_DEV_PARAMS failed";
1754 /* current CHS translation info (id[53-58]) might be
1755 * changed. reread the identify device info.
1757 flags
&= ~ATA_READID_POSTRESET
;
1767 if (ata_msg_warn(ap
))
1768 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1769 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1773 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1775 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1778 static void ata_dev_config_ncq(struct ata_device
*dev
,
1779 char *desc
, size_t desc_sz
)
1781 struct ata_port
*ap
= dev
->ap
;
1782 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1784 if (!ata_id_has_ncq(dev
->id
)) {
1788 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1789 snprintf(desc
, desc_sz
, "NCQ (not used)");
1792 if (ap
->flags
& ATA_FLAG_NCQ
) {
1793 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1794 dev
->flags
|= ATA_DFLAG_NCQ
;
1797 if (hdepth
>= ddepth
)
1798 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1800 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1804 * ata_dev_configure - Configure the specified ATA/ATAPI device
1805 * @dev: Target device to configure
1807 * Configure @dev according to @dev->id. Generic and low-level
1808 * driver specific fixups are also applied.
1811 * Kernel thread context (may sleep)
1814 * 0 on success, -errno otherwise
1816 int ata_dev_configure(struct ata_device
*dev
)
1818 struct ata_port
*ap
= dev
->ap
;
1819 struct ata_eh_context
*ehc
= &ap
->eh_context
;
1820 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1821 const u16
*id
= dev
->id
;
1822 unsigned int xfer_mask
;
1823 char revbuf
[7]; /* XYZ-99\0 */
1824 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1825 char modelbuf
[ATA_ID_PROD_LEN
+1];
1828 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1829 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1834 if (ata_msg_probe(ap
))
1835 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1838 dev
->horkage
|= ata_dev_blacklisted(dev
);
1840 /* let ACPI work its magic */
1841 rc
= ata_acpi_on_devcfg(dev
);
1845 /* print device capabilities */
1846 if (ata_msg_probe(ap
))
1847 ata_dev_printk(dev
, KERN_DEBUG
,
1848 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1849 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1851 id
[49], id
[82], id
[83], id
[84],
1852 id
[85], id
[86], id
[87], id
[88]);
1854 /* initialize to-be-configured parameters */
1855 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1856 dev
->max_sectors
= 0;
1864 * common ATA, ATAPI feature tests
1867 /* find max transfer mode; for printk only */
1868 xfer_mask
= ata_id_xfermask(id
);
1870 if (ata_msg_probe(ap
))
1873 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1874 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1877 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1880 /* ATA-specific feature tests */
1881 if (dev
->class == ATA_DEV_ATA
) {
1882 if (ata_id_is_cfa(id
)) {
1883 if (id
[162] & 1) /* CPRM may make this media unusable */
1884 ata_dev_printk(dev
, KERN_WARNING
,
1885 "supports DRM functions and may "
1886 "not be fully accessable.\n");
1887 snprintf(revbuf
, 7, "CFA");
1890 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1892 dev
->n_sectors
= ata_id_n_sectors(id
);
1894 if (dev
->id
[59] & 0x100)
1895 dev
->multi_count
= dev
->id
[59] & 0xff;
1897 if (ata_id_has_lba(id
)) {
1898 const char *lba_desc
;
1902 dev
->flags
|= ATA_DFLAG_LBA
;
1903 if (ata_id_has_lba48(id
)) {
1904 dev
->flags
|= ATA_DFLAG_LBA48
;
1907 if (dev
->n_sectors
>= (1UL << 28) &&
1908 ata_id_has_flush_ext(id
))
1909 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1912 if (ata_id_hpa_enabled(dev
->id
))
1913 dev
->n_sectors
= ata_hpa_resize(dev
);
1916 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1918 /* print device info to dmesg */
1919 if (ata_msg_drv(ap
) && print_info
) {
1920 ata_dev_printk(dev
, KERN_INFO
,
1921 "%s: %s, %s, max %s\n",
1922 revbuf
, modelbuf
, fwrevbuf
,
1923 ata_mode_string(xfer_mask
));
1924 ata_dev_printk(dev
, KERN_INFO
,
1925 "%Lu sectors, multi %u: %s %s\n",
1926 (unsigned long long)dev
->n_sectors
,
1927 dev
->multi_count
, lba_desc
, ncq_desc
);
1932 /* Default translation */
1933 dev
->cylinders
= id
[1];
1935 dev
->sectors
= id
[6];
1937 if (ata_id_current_chs_valid(id
)) {
1938 /* Current CHS translation is valid. */
1939 dev
->cylinders
= id
[54];
1940 dev
->heads
= id
[55];
1941 dev
->sectors
= id
[56];
1944 /* print device info to dmesg */
1945 if (ata_msg_drv(ap
) && print_info
) {
1946 ata_dev_printk(dev
, KERN_INFO
,
1947 "%s: %s, %s, max %s\n",
1948 revbuf
, modelbuf
, fwrevbuf
,
1949 ata_mode_string(xfer_mask
));
1950 ata_dev_printk(dev
, KERN_INFO
,
1951 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1952 (unsigned long long)dev
->n_sectors
,
1953 dev
->multi_count
, dev
->cylinders
,
1954 dev
->heads
, dev
->sectors
);
1961 /* ATAPI-specific feature tests */
1962 else if (dev
->class == ATA_DEV_ATAPI
) {
1963 char *cdb_intr_string
= "";
1965 rc
= atapi_cdb_len(id
);
1966 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1967 if (ata_msg_warn(ap
))
1968 ata_dev_printk(dev
, KERN_WARNING
,
1969 "unsupported CDB len\n");
1973 dev
->cdb_len
= (unsigned int) rc
;
1975 if (ata_id_cdb_intr(dev
->id
)) {
1976 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1977 cdb_intr_string
= ", CDB intr";
1980 /* print device info to dmesg */
1981 if (ata_msg_drv(ap
) && print_info
)
1982 ata_dev_printk(dev
, KERN_INFO
,
1983 "ATAPI: %s, %s, max %s%s\n",
1985 ata_mode_string(xfer_mask
),
1989 /* determine max_sectors */
1990 dev
->max_sectors
= ATA_MAX_SECTORS
;
1991 if (dev
->flags
& ATA_DFLAG_LBA48
)
1992 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1994 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1995 /* Let the user know. We don't want to disallow opens for
1996 rescue purposes, or in case the vendor is just a blithering
1999 ata_dev_printk(dev
, KERN_WARNING
,
2000 "Drive reports diagnostics failure. This may indicate a drive\n");
2001 ata_dev_printk(dev
, KERN_WARNING
,
2002 "fault or invalid emulation. Contact drive vendor for information.\n");
2006 /* limit bridge transfers to udma5, 200 sectors */
2007 if (ata_dev_knobble(dev
)) {
2008 if (ata_msg_drv(ap
) && print_info
)
2009 ata_dev_printk(dev
, KERN_INFO
,
2010 "applying bridge limits\n");
2011 dev
->udma_mask
&= ATA_UDMA5
;
2012 dev
->max_sectors
= ATA_MAX_SECTORS
;
2015 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2016 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2019 if (ap
->ops
->dev_config
)
2020 ap
->ops
->dev_config(dev
);
2022 if (ata_msg_probe(ap
))
2023 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2024 __FUNCTION__
, ata_chk_status(ap
));
2028 if (ata_msg_probe(ap
))
2029 ata_dev_printk(dev
, KERN_DEBUG
,
2030 "%s: EXIT, err\n", __FUNCTION__
);
2035 * ata_cable_40wire - return 40 wire cable type
2038 * Helper method for drivers which want to hardwire 40 wire cable
2042 int ata_cable_40wire(struct ata_port
*ap
)
2044 return ATA_CBL_PATA40
;
2048 * ata_cable_80wire - return 80 wire cable type
2051 * Helper method for drivers which want to hardwire 80 wire cable
2055 int ata_cable_80wire(struct ata_port
*ap
)
2057 return ATA_CBL_PATA80
;
2061 * ata_cable_unknown - return unknown PATA cable.
2064 * Helper method for drivers which have no PATA cable detection.
2067 int ata_cable_unknown(struct ata_port
*ap
)
2069 return ATA_CBL_PATA_UNK
;
2073 * ata_cable_sata - return SATA cable type
2076 * Helper method for drivers which have SATA cables
2079 int ata_cable_sata(struct ata_port
*ap
)
2081 return ATA_CBL_SATA
;
2085 * ata_bus_probe - Reset and probe ATA bus
2088 * Master ATA bus probing function. Initiates a hardware-dependent
2089 * bus reset, then attempts to identify any devices found on
2093 * PCI/etc. bus probe sem.
2096 * Zero on success, negative errno otherwise.
2099 int ata_bus_probe(struct ata_port
*ap
)
2101 unsigned int classes
[ATA_MAX_DEVICES
];
2102 int tries
[ATA_MAX_DEVICES
];
2104 struct ata_device
*dev
;
2108 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2109 tries
[i
] = ATA_PROBE_MAX_TRIES
;
2112 /* reset and determine device classes */
2113 ap
->ops
->phy_reset(ap
);
2115 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2116 dev
= &ap
->device
[i
];
2118 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2119 dev
->class != ATA_DEV_UNKNOWN
)
2120 classes
[dev
->devno
] = dev
->class;
2122 classes
[dev
->devno
] = ATA_DEV_NONE
;
2124 dev
->class = ATA_DEV_UNKNOWN
;
2129 /* after the reset the device state is PIO 0 and the controller
2130 state is undefined. Record the mode */
2132 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2133 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
2135 /* read IDENTIFY page and configure devices. We have to do the identify
2136 specific sequence bass-ackwards so that PDIAG- is released by
2139 for (i
= ATA_MAX_DEVICES
- 1; i
>= 0; i
--) {
2140 dev
= &ap
->device
[i
];
2143 dev
->class = classes
[i
];
2145 if (!ata_dev_enabled(dev
))
2148 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2154 /* Now ask for the cable type as PDIAG- should have been released */
2155 if (ap
->ops
->cable_detect
)
2156 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2158 /* After the identify sequence we can now set up the devices. We do
2159 this in the normal order so that the user doesn't get confused */
2161 for(i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2162 dev
= &ap
->device
[i
];
2163 if (!ata_dev_enabled(dev
))
2166 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2167 rc
= ata_dev_configure(dev
);
2168 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2173 /* configure transfer mode */
2174 rc
= ata_set_mode(ap
, &dev
);
2178 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2179 if (ata_dev_enabled(&ap
->device
[i
]))
2182 /* no device present, disable port */
2183 ata_port_disable(ap
);
2184 ap
->ops
->port_disable(ap
);
2188 tries
[dev
->devno
]--;
2192 /* eeek, something went very wrong, give up */
2193 tries
[dev
->devno
] = 0;
2197 /* give it just one more chance */
2198 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2200 if (tries
[dev
->devno
] == 1) {
2201 /* This is the last chance, better to slow
2202 * down than lose it.
2204 sata_down_spd_limit(ap
);
2205 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2209 if (!tries
[dev
->devno
])
2210 ata_dev_disable(dev
);
2216 * ata_port_probe - Mark port as enabled
2217 * @ap: Port for which we indicate enablement
2219 * Modify @ap data structure such that the system
2220 * thinks that the entire port is enabled.
2222 * LOCKING: host lock, or some other form of
2226 void ata_port_probe(struct ata_port
*ap
)
2228 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2232 * sata_print_link_status - Print SATA link status
2233 * @ap: SATA port to printk link status about
2235 * This function prints link speed and status of a SATA link.
2240 void sata_print_link_status(struct ata_port
*ap
)
2242 u32 sstatus
, scontrol
, tmp
;
2244 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
2246 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
2248 if (ata_port_online(ap
)) {
2249 tmp
= (sstatus
>> 4) & 0xf;
2250 ata_port_printk(ap
, KERN_INFO
,
2251 "SATA link up %s (SStatus %X SControl %X)\n",
2252 sata_spd_string(tmp
), sstatus
, scontrol
);
2254 ata_port_printk(ap
, KERN_INFO
,
2255 "SATA link down (SStatus %X SControl %X)\n",
2261 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2262 * @ap: SATA port associated with target SATA PHY.
2264 * This function issues commands to standard SATA Sxxx
2265 * PHY registers, to wake up the phy (and device), and
2266 * clear any reset condition.
2269 * PCI/etc. bus probe sem.
2272 void __sata_phy_reset(struct ata_port
*ap
)
2275 unsigned long timeout
= jiffies
+ (HZ
* 5);
2277 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2278 /* issue phy wake/reset */
2279 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2280 /* Couldn't find anything in SATA I/II specs, but
2281 * AHCI-1.1 10.4.2 says at least 1 ms. */
2284 /* phy wake/clear reset */
2285 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2287 /* wait for phy to become ready, if necessary */
2290 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2291 if ((sstatus
& 0xf) != 1)
2293 } while (time_before(jiffies
, timeout
));
2295 /* print link status */
2296 sata_print_link_status(ap
);
2298 /* TODO: phy layer with polling, timeouts, etc. */
2299 if (!ata_port_offline(ap
))
2302 ata_port_disable(ap
);
2304 if (ap
->flags
& ATA_FLAG_DISABLED
)
2307 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2308 ata_port_disable(ap
);
2312 ap
->cbl
= ATA_CBL_SATA
;
2316 * sata_phy_reset - Reset SATA bus.
2317 * @ap: SATA port associated with target SATA PHY.
2319 * This function resets the SATA bus, and then probes
2320 * the bus for devices.
2323 * PCI/etc. bus probe sem.
2326 void sata_phy_reset(struct ata_port
*ap
)
2328 __sata_phy_reset(ap
);
2329 if (ap
->flags
& ATA_FLAG_DISABLED
)
2335 * ata_dev_pair - return other device on cable
2338 * Obtain the other device on the same cable, or if none is
2339 * present NULL is returned
2342 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2344 struct ata_port
*ap
= adev
->ap
;
2345 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2346 if (!ata_dev_enabled(pair
))
2352 * ata_port_disable - Disable port.
2353 * @ap: Port to be disabled.
2355 * Modify @ap data structure such that the system
2356 * thinks that the entire port is disabled, and should
2357 * never attempt to probe or communicate with devices
2360 * LOCKING: host lock, or some other form of
2364 void ata_port_disable(struct ata_port
*ap
)
2366 ap
->device
[0].class = ATA_DEV_NONE
;
2367 ap
->device
[1].class = ATA_DEV_NONE
;
2368 ap
->flags
|= ATA_FLAG_DISABLED
;
2372 * sata_down_spd_limit - adjust SATA spd limit downward
2373 * @ap: Port to adjust SATA spd limit for
2375 * Adjust SATA spd limit of @ap downward. Note that this
2376 * function only adjusts the limit. The change must be applied
2377 * using sata_set_spd().
2380 * Inherited from caller.
2383 * 0 on success, negative errno on failure
2385 int sata_down_spd_limit(struct ata_port
*ap
)
2387 u32 sstatus
, spd
, mask
;
2390 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2394 mask
= ap
->sata_spd_limit
;
2397 highbit
= fls(mask
) - 1;
2398 mask
&= ~(1 << highbit
);
2400 spd
= (sstatus
>> 4) & 0xf;
2404 mask
&= (1 << spd
) - 1;
2408 ap
->sata_spd_limit
= mask
;
2410 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2411 sata_spd_string(fls(mask
)));
2416 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2420 if (ap
->sata_spd_limit
== UINT_MAX
)
2423 limit
= fls(ap
->sata_spd_limit
);
2425 spd
= (*scontrol
>> 4) & 0xf;
2426 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2428 return spd
!= limit
;
2432 * sata_set_spd_needed - is SATA spd configuration needed
2433 * @ap: Port in question
2435 * Test whether the spd limit in SControl matches
2436 * @ap->sata_spd_limit. This function is used to determine
2437 * whether hardreset is necessary to apply SATA spd
2441 * Inherited from caller.
2444 * 1 if SATA spd configuration is needed, 0 otherwise.
2446 int sata_set_spd_needed(struct ata_port
*ap
)
2450 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2453 return __sata_set_spd_needed(ap
, &scontrol
);
2457 * sata_set_spd - set SATA spd according to spd limit
2458 * @ap: Port to set SATA spd for
2460 * Set SATA spd of @ap according to sata_spd_limit.
2463 * Inherited from caller.
2466 * 0 if spd doesn't need to be changed, 1 if spd has been
2467 * changed. Negative errno if SCR registers are inaccessible.
2469 int sata_set_spd(struct ata_port
*ap
)
2474 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2477 if (!__sata_set_spd_needed(ap
, &scontrol
))
2480 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2487 * This mode timing computation functionality is ported over from
2488 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2491 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2492 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2493 * for UDMA6, which is currently supported only by Maxtor drives.
2495 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2498 static const struct ata_timing ata_timing
[] = {
2500 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2501 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2502 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2503 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2505 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2506 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2507 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2508 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2509 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2511 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2513 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2514 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2515 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2517 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2518 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2519 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2521 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2522 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2523 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2524 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2526 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2527 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2528 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2530 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2535 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2536 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2538 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2540 q
->setup
= EZ(t
->setup
* 1000, T
);
2541 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2542 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2543 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2544 q
->active
= EZ(t
->active
* 1000, T
);
2545 q
->recover
= EZ(t
->recover
* 1000, T
);
2546 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2547 q
->udma
= EZ(t
->udma
* 1000, UT
);
2550 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2551 struct ata_timing
*m
, unsigned int what
)
2553 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2554 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2555 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2556 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2557 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2558 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2559 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2560 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2563 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2565 const struct ata_timing
*t
;
2567 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2568 if (t
->mode
== 0xFF)
2573 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2574 struct ata_timing
*t
, int T
, int UT
)
2576 const struct ata_timing
*s
;
2577 struct ata_timing p
;
2583 if (!(s
= ata_timing_find_mode(speed
)))
2586 memcpy(t
, s
, sizeof(*s
));
2589 * If the drive is an EIDE drive, it can tell us it needs extended
2590 * PIO/MW_DMA cycle timing.
2593 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2594 memset(&p
, 0, sizeof(p
));
2595 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2596 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2597 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2598 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2599 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2601 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2605 * Convert the timing to bus clock counts.
2608 ata_timing_quantize(t
, t
, T
, UT
);
2611 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2612 * S.M.A.R.T * and some other commands. We have to ensure that the
2613 * DMA cycle timing is slower/equal than the fastest PIO timing.
2616 if (speed
> XFER_PIO_6
) {
2617 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2618 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2622 * Lengthen active & recovery time so that cycle time is correct.
2625 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2626 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2627 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2630 if (t
->active
+ t
->recover
< t
->cycle
) {
2631 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2632 t
->recover
= t
->cycle
- t
->active
;
2635 /* In a few cases quantisation may produce enough errors to
2636 leave t->cycle too low for the sum of active and recovery
2637 if so we must correct this */
2638 if (t
->active
+ t
->recover
> t
->cycle
)
2639 t
->cycle
= t
->active
+ t
->recover
;
2645 * ata_down_xfermask_limit - adjust dev xfer masks downward
2646 * @dev: Device to adjust xfer masks
2647 * @sel: ATA_DNXFER_* selector
2649 * Adjust xfer masks of @dev downward. Note that this function
2650 * does not apply the change. Invoking ata_set_mode() afterwards
2651 * will apply the limit.
2654 * Inherited from caller.
2657 * 0 on success, negative errno on failure
2659 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2662 unsigned int orig_mask
, xfer_mask
;
2663 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2666 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2667 sel
&= ~ATA_DNXFER_QUIET
;
2669 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2672 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2675 case ATA_DNXFER_PIO
:
2676 highbit
= fls(pio_mask
) - 1;
2677 pio_mask
&= ~(1 << highbit
);
2680 case ATA_DNXFER_DMA
:
2682 highbit
= fls(udma_mask
) - 1;
2683 udma_mask
&= ~(1 << highbit
);
2686 } else if (mwdma_mask
) {
2687 highbit
= fls(mwdma_mask
) - 1;
2688 mwdma_mask
&= ~(1 << highbit
);
2694 case ATA_DNXFER_40C
:
2695 udma_mask
&= ATA_UDMA_MASK_40C
;
2698 case ATA_DNXFER_FORCE_PIO0
:
2700 case ATA_DNXFER_FORCE_PIO
:
2709 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2711 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2715 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2716 snprintf(buf
, sizeof(buf
), "%s:%s",
2717 ata_mode_string(xfer_mask
),
2718 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2720 snprintf(buf
, sizeof(buf
), "%s",
2721 ata_mode_string(xfer_mask
));
2723 ata_dev_printk(dev
, KERN_WARNING
,
2724 "limiting speed to %s\n", buf
);
2727 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2733 static int ata_dev_set_mode(struct ata_device
*dev
)
2735 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2736 unsigned int err_mask
;
2739 dev
->flags
&= ~ATA_DFLAG_PIO
;
2740 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2741 dev
->flags
|= ATA_DFLAG_PIO
;
2743 err_mask
= ata_dev_set_xfermode(dev
);
2744 /* Old CFA may refuse this command, which is just fine */
2745 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2746 err_mask
&= ~AC_ERR_DEV
;
2749 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2750 "(err_mask=0x%x)\n", err_mask
);
2754 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2755 rc
= ata_dev_revalidate(dev
, 0);
2756 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2760 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2761 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2763 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2764 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2769 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2770 * @ap: port on which timings will be programmed
2771 * @r_failed_dev: out paramter for failed device
2773 * Standard implementation of the function used to tune and set
2774 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2775 * ata_dev_set_mode() fails, pointer to the failing device is
2776 * returned in @r_failed_dev.
2779 * PCI/etc. bus probe sem.
2782 * 0 on success, negative errno otherwise
2785 int ata_do_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2787 struct ata_device
*dev
;
2788 int i
, rc
= 0, used_dma
= 0, found
= 0;
2791 /* step 1: calculate xfer_mask */
2792 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2793 unsigned int pio_mask
, dma_mask
;
2795 dev
= &ap
->device
[i
];
2797 if (!ata_dev_enabled(dev
))
2800 ata_dev_xfermask(dev
);
2802 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2803 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2804 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2805 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2814 /* step 2: always set host PIO timings */
2815 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2816 dev
= &ap
->device
[i
];
2817 if (!ata_dev_enabled(dev
))
2820 if (!dev
->pio_mode
) {
2821 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2826 dev
->xfer_mode
= dev
->pio_mode
;
2827 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2828 if (ap
->ops
->set_piomode
)
2829 ap
->ops
->set_piomode(ap
, dev
);
2832 /* step 3: set host DMA timings */
2833 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2834 dev
= &ap
->device
[i
];
2836 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2839 dev
->xfer_mode
= dev
->dma_mode
;
2840 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2841 if (ap
->ops
->set_dmamode
)
2842 ap
->ops
->set_dmamode(ap
, dev
);
2845 /* step 4: update devices' xfer mode */
2846 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2847 dev
= &ap
->device
[i
];
2849 /* don't update suspended devices' xfer mode */
2850 if (!ata_dev_enabled(dev
))
2853 rc
= ata_dev_set_mode(dev
);
2858 /* Record simplex status. If we selected DMA then the other
2859 * host channels are not permitted to do so.
2861 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2862 ap
->host
->simplex_claimed
= ap
;
2866 *r_failed_dev
= dev
;
2871 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2872 * @ap: port on which timings will be programmed
2873 * @r_failed_dev: out paramter for failed device
2875 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2876 * ata_set_mode() fails, pointer to the failing device is
2877 * returned in @r_failed_dev.
2880 * PCI/etc. bus probe sem.
2883 * 0 on success, negative errno otherwise
2885 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2887 /* has private set_mode? */
2888 if (ap
->ops
->set_mode
)
2889 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2890 return ata_do_set_mode(ap
, r_failed_dev
);
2894 * ata_tf_to_host - issue ATA taskfile to host controller
2895 * @ap: port to which command is being issued
2896 * @tf: ATA taskfile register set
2898 * Issues ATA taskfile register set to ATA host controller,
2899 * with proper synchronization with interrupt handler and
2903 * spin_lock_irqsave(host lock)
2906 static inline void ata_tf_to_host(struct ata_port
*ap
,
2907 const struct ata_taskfile
*tf
)
2909 ap
->ops
->tf_load(ap
, tf
);
2910 ap
->ops
->exec_command(ap
, tf
);
2914 * ata_busy_sleep - sleep until BSY clears, or timeout
2915 * @ap: port containing status register to be polled
2916 * @tmout_pat: impatience timeout
2917 * @tmout: overall timeout
2919 * Sleep until ATA Status register bit BSY clears,
2920 * or a timeout occurs.
2923 * Kernel thread context (may sleep).
2926 * 0 on success, -errno otherwise.
2928 int ata_busy_sleep(struct ata_port
*ap
,
2929 unsigned long tmout_pat
, unsigned long tmout
)
2931 unsigned long timer_start
, timeout
;
2934 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2935 timer_start
= jiffies
;
2936 timeout
= timer_start
+ tmout_pat
;
2937 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2938 time_before(jiffies
, timeout
)) {
2940 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2943 if (status
!= 0xff && (status
& ATA_BUSY
))
2944 ata_port_printk(ap
, KERN_WARNING
,
2945 "port is slow to respond, please be patient "
2946 "(Status 0x%x)\n", status
);
2948 timeout
= timer_start
+ tmout
;
2949 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2950 time_before(jiffies
, timeout
)) {
2952 status
= ata_chk_status(ap
);
2958 if (status
& ATA_BUSY
) {
2959 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2960 "(%lu secs, Status 0x%x)\n",
2961 tmout
/ HZ
, status
);
2969 * ata_wait_ready - sleep until BSY clears, or timeout
2970 * @ap: port containing status register to be polled
2971 * @deadline: deadline jiffies for the operation
2973 * Sleep until ATA Status register bit BSY clears, or timeout
2977 * Kernel thread context (may sleep).
2980 * 0 on success, -errno otherwise.
2982 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
2984 unsigned long start
= jiffies
;
2988 u8 status
= ata_chk_status(ap
);
2989 unsigned long now
= jiffies
;
2991 if (!(status
& ATA_BUSY
))
2993 if (!ata_port_online(ap
) && status
== 0xff)
2995 if (time_after(now
, deadline
))
2998 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
2999 (deadline
- now
> 3 * HZ
)) {
3000 ata_port_printk(ap
, KERN_WARNING
,
3001 "port is slow to respond, please be patient "
3002 "(Status 0x%x)\n", status
);
3010 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3011 unsigned long deadline
)
3013 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3014 unsigned int dev0
= devmask
& (1 << 0);
3015 unsigned int dev1
= devmask
& (1 << 1);
3018 /* if device 0 was found in ata_devchk, wait for its
3022 rc
= ata_wait_ready(ap
, deadline
);
3030 /* if device 1 was found in ata_devchk, wait for register
3031 * access briefly, then wait for BSY to clear.
3036 ap
->ops
->dev_select(ap
, 1);
3038 /* Wait for register access. Some ATAPI devices fail
3039 * to set nsect/lbal after reset, so don't waste too
3040 * much time on it. We're gonna wait for !BSY anyway.
3042 for (i
= 0; i
< 2; i
++) {
3045 nsect
= ioread8(ioaddr
->nsect_addr
);
3046 lbal
= ioread8(ioaddr
->lbal_addr
);
3047 if ((nsect
== 1) && (lbal
== 1))
3049 msleep(50); /* give drive a breather */
3052 rc
= ata_wait_ready(ap
, deadline
);
3060 /* is all this really necessary? */
3061 ap
->ops
->dev_select(ap
, 0);
3063 ap
->ops
->dev_select(ap
, 1);
3065 ap
->ops
->dev_select(ap
, 0);
3070 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3071 unsigned long deadline
)
3073 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3075 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3077 /* software reset. causes dev0 to be selected */
3078 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3079 udelay(20); /* FIXME: flush */
3080 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3081 udelay(20); /* FIXME: flush */
3082 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3084 /* spec mandates ">= 2ms" before checking status.
3085 * We wait 150ms, because that was the magic delay used for
3086 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3087 * between when the ATA command register is written, and then
3088 * status is checked. Because waiting for "a while" before
3089 * checking status is fine, post SRST, we perform this magic
3090 * delay here as well.
3092 * Old drivers/ide uses the 2mS rule and then waits for ready
3096 /* Before we perform post reset processing we want to see if
3097 * the bus shows 0xFF because the odd clown forgets the D7
3098 * pulldown resistor.
3100 if (ata_check_status(ap
) == 0xFF)
3103 return ata_bus_post_reset(ap
, devmask
, deadline
);
3107 * ata_bus_reset - reset host port and associated ATA channel
3108 * @ap: port to reset
3110 * This is typically the first time we actually start issuing
3111 * commands to the ATA channel. We wait for BSY to clear, then
3112 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3113 * result. Determine what devices, if any, are on the channel
3114 * by looking at the device 0/1 error register. Look at the signature
3115 * stored in each device's taskfile registers, to determine if
3116 * the device is ATA or ATAPI.
3119 * PCI/etc. bus probe sem.
3120 * Obtains host lock.
3123 * Sets ATA_FLAG_DISABLED if bus reset fails.
3126 void ata_bus_reset(struct ata_port
*ap
)
3128 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3129 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3131 unsigned int dev0
, dev1
= 0, devmask
= 0;
3134 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3136 /* determine if device 0/1 are present */
3137 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3140 dev0
= ata_devchk(ap
, 0);
3142 dev1
= ata_devchk(ap
, 1);
3146 devmask
|= (1 << 0);
3148 devmask
|= (1 << 1);
3150 /* select device 0 again */
3151 ap
->ops
->dev_select(ap
, 0);
3153 /* issue bus reset */
3154 if (ap
->flags
& ATA_FLAG_SRST
) {
3155 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3156 if (rc
&& rc
!= -ENODEV
)
3161 * determine by signature whether we have ATA or ATAPI devices
3163 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
3164 if ((slave_possible
) && (err
!= 0x81))
3165 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
3167 /* is double-select really necessary? */
3168 if (ap
->device
[1].class != ATA_DEV_NONE
)
3169 ap
->ops
->dev_select(ap
, 1);
3170 if (ap
->device
[0].class != ATA_DEV_NONE
)
3171 ap
->ops
->dev_select(ap
, 0);
3173 /* if no devices were detected, disable this port */
3174 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
3175 (ap
->device
[1].class == ATA_DEV_NONE
))
3178 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3179 /* set up device control for ATA_FLAG_SATA_RESET */
3180 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3187 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3188 ap
->ops
->port_disable(ap
);
3194 * sata_phy_debounce - debounce SATA phy status
3195 * @ap: ATA port to debounce SATA phy status for
3196 * @params: timing parameters { interval, duratinon, timeout } in msec
3197 * @deadline: deadline jiffies for the operation
3199 * Make sure SStatus of @ap reaches stable state, determined by
3200 * holding the same value where DET is not 1 for @duration polled
3201 * every @interval, before @timeout. Timeout constraints the
3202 * beginning of the stable state. Because DET gets stuck at 1 on
3203 * some controllers after hot unplugging, this functions waits
3204 * until timeout then returns 0 if DET is stable at 1.
3206 * @timeout is further limited by @deadline. The sooner of the
3210 * Kernel thread context (may sleep)
3213 * 0 on success, -errno on failure.
3215 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
,
3216 unsigned long deadline
)
3218 unsigned long interval_msec
= params
[0];
3219 unsigned long duration
= msecs_to_jiffies(params
[1]);
3220 unsigned long last_jiffies
, t
;
3224 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3225 if (time_before(t
, deadline
))
3228 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3233 last_jiffies
= jiffies
;
3236 msleep(interval_msec
);
3237 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3243 if (cur
== 1 && time_before(jiffies
, deadline
))
3245 if (time_after(jiffies
, last_jiffies
+ duration
))
3250 /* unstable, start over */
3252 last_jiffies
= jiffies
;
3254 /* check deadline */
3255 if (time_after(jiffies
, deadline
))
3261 * sata_phy_resume - resume SATA phy
3262 * @ap: ATA port to resume SATA phy for
3263 * @params: timing parameters { interval, duratinon, timeout } in msec
3264 * @deadline: deadline jiffies for the operation
3266 * Resume SATA phy of @ap and debounce it.
3269 * Kernel thread context (may sleep)
3272 * 0 on success, -errno on failure.
3274 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
,
3275 unsigned long deadline
)
3280 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3283 scontrol
= (scontrol
& 0x0f0) | 0x300;
3285 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3288 /* Some PHYs react badly if SStatus is pounded immediately
3289 * after resuming. Delay 200ms before debouncing.
3293 return sata_phy_debounce(ap
, params
, deadline
);
3297 * ata_std_prereset - prepare for reset
3298 * @ap: ATA port to be reset
3299 * @deadline: deadline jiffies for the operation
3301 * @ap is about to be reset. Initialize it. Failure from
3302 * prereset makes libata abort whole reset sequence and give up
3303 * that port, so prereset should be best-effort. It does its
3304 * best to prepare for reset sequence but if things go wrong, it
3305 * should just whine, not fail.
3308 * Kernel thread context (may sleep)
3311 * 0 on success, -errno otherwise.
3313 int ata_std_prereset(struct ata_port
*ap
, unsigned long deadline
)
3315 struct ata_eh_context
*ehc
= &ap
->eh_context
;
3316 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3319 /* handle link resume */
3320 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3321 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
3322 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3324 /* if we're about to do hardreset, nothing more to do */
3325 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3328 /* if SATA, resume phy */
3329 if (ap
->flags
& ATA_FLAG_SATA
) {
3330 rc
= sata_phy_resume(ap
, timing
, deadline
);
3331 /* whine about phy resume failure but proceed */
3332 if (rc
&& rc
!= -EOPNOTSUPP
)
3333 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
3334 "link for reset (errno=%d)\n", rc
);
3337 /* Wait for !BSY if the controller can wait for the first D2H
3338 * Reg FIS and we don't know that no device is attached.
3340 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
)) {
3341 rc
= ata_wait_ready(ap
, deadline
);
3342 if (rc
&& rc
!= -ENODEV
) {
3343 ata_port_printk(ap
, KERN_WARNING
, "device not ready "
3344 "(errno=%d), forcing hardreset\n", rc
);
3345 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3353 * ata_std_softreset - reset host port via ATA SRST
3354 * @ap: port to reset
3355 * @classes: resulting classes of attached devices
3356 * @deadline: deadline jiffies for the operation
3358 * Reset host port using ATA SRST.
3361 * Kernel thread context (may sleep)
3364 * 0 on success, -errno otherwise.
3366 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
,
3367 unsigned long deadline
)
3369 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3370 unsigned int devmask
= 0;
3376 if (ata_port_offline(ap
)) {
3377 classes
[0] = ATA_DEV_NONE
;
3381 /* determine if device 0/1 are present */
3382 if (ata_devchk(ap
, 0))
3383 devmask
|= (1 << 0);
3384 if (slave_possible
&& ata_devchk(ap
, 1))
3385 devmask
|= (1 << 1);
3387 /* select device 0 again */
3388 ap
->ops
->dev_select(ap
, 0);
3390 /* issue bus reset */
3391 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3392 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3393 /* if link is occupied, -ENODEV too is an error */
3394 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(ap
))) {
3395 ata_port_printk(ap
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3399 /* determine by signature whether we have ATA or ATAPI devices */
3400 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3401 if (slave_possible
&& err
!= 0x81)
3402 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3405 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3410 * sata_port_hardreset - reset port via SATA phy reset
3411 * @ap: port to reset
3412 * @timing: timing parameters { interval, duratinon, timeout } in msec
3413 * @deadline: deadline jiffies for the operation
3415 * SATA phy-reset host port using DET bits of SControl register.
3418 * Kernel thread context (may sleep)
3421 * 0 on success, -errno otherwise.
3423 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
,
3424 unsigned long deadline
)
3431 if (sata_set_spd_needed(ap
)) {
3432 /* SATA spec says nothing about how to reconfigure
3433 * spd. To be on the safe side, turn off phy during
3434 * reconfiguration. This works for at least ICH7 AHCI
3437 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3440 scontrol
= (scontrol
& 0x0f0) | 0x304;
3442 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3448 /* issue phy wake/reset */
3449 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3452 scontrol
= (scontrol
& 0x0f0) | 0x301;
3454 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3457 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3458 * 10.4.2 says at least 1 ms.
3462 /* bring phy back */
3463 rc
= sata_phy_resume(ap
, timing
, deadline
);
3465 DPRINTK("EXIT, rc=%d\n", rc
);
3470 * sata_std_hardreset - reset host port via SATA phy reset
3471 * @ap: port to reset
3472 * @class: resulting class of attached device
3473 * @deadline: deadline jiffies for the operation
3475 * SATA phy-reset host port using DET bits of SControl register,
3476 * wait for !BSY and classify the attached device.
3479 * Kernel thread context (may sleep)
3482 * 0 on success, -errno otherwise.
3484 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class,
3485 unsigned long deadline
)
3487 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3493 rc
= sata_port_hardreset(ap
, timing
, deadline
);
3495 ata_port_printk(ap
, KERN_ERR
,
3496 "COMRESET failed (errno=%d)\n", rc
);
3500 /* TODO: phy layer with polling, timeouts, etc. */
3501 if (ata_port_offline(ap
)) {
3502 *class = ATA_DEV_NONE
;
3503 DPRINTK("EXIT, link offline\n");
3507 /* wait a while before checking status, see SRST for more info */
3510 rc
= ata_wait_ready(ap
, deadline
);
3511 /* link occupied, -ENODEV too is an error */
3513 ata_port_printk(ap
, KERN_ERR
,
3514 "COMRESET failed (errno=%d)\n", rc
);
3518 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3520 *class = ata_dev_try_classify(ap
, 0, NULL
);
3522 DPRINTK("EXIT, class=%u\n", *class);
3527 * ata_std_postreset - standard postreset callback
3528 * @ap: the target ata_port
3529 * @classes: classes of attached devices
3531 * This function is invoked after a successful reset. Note that
3532 * the device might have been reset more than once using
3533 * different reset methods before postreset is invoked.
3536 * Kernel thread context (may sleep)
3538 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3544 /* print link status */
3545 sata_print_link_status(ap
);
3548 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3549 sata_scr_write(ap
, SCR_ERROR
, serror
);
3551 /* is double-select really necessary? */
3552 if (classes
[0] != ATA_DEV_NONE
)
3553 ap
->ops
->dev_select(ap
, 1);
3554 if (classes
[1] != ATA_DEV_NONE
)
3555 ap
->ops
->dev_select(ap
, 0);
3557 /* bail out if no device is present */
3558 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3559 DPRINTK("EXIT, no device\n");
3563 /* set up device control */
3564 if (ap
->ioaddr
.ctl_addr
)
3565 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3571 * ata_dev_same_device - Determine whether new ID matches configured device
3572 * @dev: device to compare against
3573 * @new_class: class of the new device
3574 * @new_id: IDENTIFY page of the new device
3576 * Compare @new_class and @new_id against @dev and determine
3577 * whether @dev is the device indicated by @new_class and
3584 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3586 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3589 const u16
*old_id
= dev
->id
;
3590 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3591 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3593 if (dev
->class != new_class
) {
3594 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3595 dev
->class, new_class
);
3599 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3600 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3601 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3602 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3604 if (strcmp(model
[0], model
[1])) {
3605 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3606 "'%s' != '%s'\n", model
[0], model
[1]);
3610 if (strcmp(serial
[0], serial
[1])) {
3611 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3612 "'%s' != '%s'\n", serial
[0], serial
[1]);
3620 * ata_dev_reread_id - Re-read IDENTIFY data
3621 * @dev: target ATA device
3622 * @readid_flags: read ID flags
3624 * Re-read IDENTIFY page and make sure @dev is still attached to
3628 * Kernel thread context (may sleep)
3631 * 0 on success, negative errno otherwise
3633 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3635 unsigned int class = dev
->class;
3636 u16
*id
= (void *)dev
->ap
->sector_buf
;
3640 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3644 /* is the device still there? */
3645 if (!ata_dev_same_device(dev
, class, id
))
3648 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3653 * ata_dev_revalidate - Revalidate ATA device
3654 * @dev: device to revalidate
3655 * @readid_flags: read ID flags
3657 * Re-read IDENTIFY page, make sure @dev is still attached to the
3658 * port and reconfigure it according to the new IDENTIFY page.
3661 * Kernel thread context (may sleep)
3664 * 0 on success, negative errno otherwise
3666 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3668 u64 n_sectors
= dev
->n_sectors
;
3671 if (!ata_dev_enabled(dev
))
3675 rc
= ata_dev_reread_id(dev
, readid_flags
);
3679 /* configure device according to the new ID */
3680 rc
= ata_dev_configure(dev
);
3684 /* verify n_sectors hasn't changed */
3685 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= n_sectors
) {
3686 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3688 (unsigned long long)n_sectors
,
3689 (unsigned long long)dev
->n_sectors
);
3697 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3701 struct ata_blacklist_entry
{
3702 const char *model_num
;
3703 const char *model_rev
;
3704 unsigned long horkage
;
3707 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3708 /* Devices with DMA related problems under Linux */
3709 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3710 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3711 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3712 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3713 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3714 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3715 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3716 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3717 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3718 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3719 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3720 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3721 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3722 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3723 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3724 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3725 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3726 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3727 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3728 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3729 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3730 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3731 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3732 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3733 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3734 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3735 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3736 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3737 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3738 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3739 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3740 { "IOMEGA ZIP 250 ATAPI Floppy",
3741 NULL
, ATA_HORKAGE_NODMA
},
3743 /* Weird ATAPI devices */
3744 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3746 /* Devices we expect to fail diagnostics */
3748 /* Devices where NCQ should be avoided */
3750 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3751 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3752 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3754 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3755 { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ
},
3756 { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ
},
3757 { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
3758 ATA_HORKAGE_NONCQ
},
3759 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3760 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3761 /* Blacklist entries taken from Silicon Image 3124/3132
3762 Windows driver .inf file - also several Linux problem reports */
3763 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3764 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3765 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3766 /* Drives which do spurious command completion */
3767 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3768 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3769 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3770 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3771 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3773 /* Devices with NCQ limits */
3779 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3781 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3782 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3783 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3785 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3786 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3788 while (ad
->model_num
) {
3789 if (!strcmp(ad
->model_num
, model_num
)) {
3790 if (ad
->model_rev
== NULL
)
3792 if (!strcmp(ad
->model_rev
, model_rev
))
3800 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3802 /* We don't support polling DMA.
3803 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3804 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3806 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3807 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3809 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
3813 * ata_dev_xfermask - Compute supported xfermask of the given device
3814 * @dev: Device to compute xfermask for
3816 * Compute supported xfermask of @dev and store it in
3817 * dev->*_mask. This function is responsible for applying all
3818 * known limits including host controller limits, device
3824 static void ata_dev_xfermask(struct ata_device
*dev
)
3826 struct ata_port
*ap
= dev
->ap
;
3827 struct ata_host
*host
= ap
->host
;
3828 unsigned long xfer_mask
;
3830 /* controller modes available */
3831 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3832 ap
->mwdma_mask
, ap
->udma_mask
);
3834 /* drive modes available */
3835 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3836 dev
->mwdma_mask
, dev
->udma_mask
);
3837 xfer_mask
&= ata_id_xfermask(dev
->id
);
3840 * CFA Advanced TrueIDE timings are not allowed on a shared
3843 if (ata_dev_pair(dev
)) {
3844 /* No PIO5 or PIO6 */
3845 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3846 /* No MWDMA3 or MWDMA 4 */
3847 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3850 if (ata_dma_blacklisted(dev
)) {
3851 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3852 ata_dev_printk(dev
, KERN_WARNING
,
3853 "device is on DMA blacklist, disabling DMA\n");
3856 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3857 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3858 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3859 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3860 "other device, disabling DMA\n");
3863 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3864 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3866 if (ap
->ops
->mode_filter
)
3867 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3869 /* Apply cable rule here. Don't apply it early because when
3870 * we handle hot plug the cable type can itself change.
3871 * Check this last so that we know if the transfer rate was
3872 * solely limited by the cable.
3873 * Unknown or 80 wire cables reported host side are checked
3874 * drive side as well. Cases where we know a 40wire cable
3875 * is used safely for 80 are not checked here.
3877 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3878 /* UDMA/44 or higher would be available */
3879 if((ap
->cbl
== ATA_CBL_PATA40
) ||
3880 (ata_drive_40wire(dev
->id
) &&
3881 (ap
->cbl
== ATA_CBL_PATA_UNK
||
3882 ap
->cbl
== ATA_CBL_PATA80
))) {
3883 ata_dev_printk(dev
, KERN_WARNING
,
3884 "limited to UDMA/33 due to 40-wire cable\n");
3885 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3888 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3889 &dev
->mwdma_mask
, &dev
->udma_mask
);
3893 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3894 * @dev: Device to which command will be sent
3896 * Issue SET FEATURES - XFER MODE command to device @dev
3900 * PCI/etc. bus probe sem.
3903 * 0 on success, AC_ERR_* mask otherwise.
3906 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3908 struct ata_taskfile tf
;
3909 unsigned int err_mask
;
3911 /* set up set-features taskfile */
3912 DPRINTK("set features - xfer mode\n");
3914 /* Some controllers and ATAPI devices show flaky interrupt
3915 * behavior after setting xfer mode. Use polling instead.
3917 ata_tf_init(dev
, &tf
);
3918 tf
.command
= ATA_CMD_SET_FEATURES
;
3919 tf
.feature
= SETFEATURES_XFER
;
3920 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
3921 tf
.protocol
= ATA_PROT_NODATA
;
3922 tf
.nsect
= dev
->xfer_mode
;
3924 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3926 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3931 * ata_dev_init_params - Issue INIT DEV PARAMS command
3932 * @dev: Device to which command will be sent
3933 * @heads: Number of heads (taskfile parameter)
3934 * @sectors: Number of sectors (taskfile parameter)
3937 * Kernel thread context (may sleep)
3940 * 0 on success, AC_ERR_* mask otherwise.
3942 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3943 u16 heads
, u16 sectors
)
3945 struct ata_taskfile tf
;
3946 unsigned int err_mask
;
3948 /* Number of sectors per track 1-255. Number of heads 1-16 */
3949 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3950 return AC_ERR_INVALID
;
3952 /* set up init dev params taskfile */
3953 DPRINTK("init dev params \n");
3955 ata_tf_init(dev
, &tf
);
3956 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3957 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3958 tf
.protocol
= ATA_PROT_NODATA
;
3960 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3962 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3964 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3969 * ata_sg_clean - Unmap DMA memory associated with command
3970 * @qc: Command containing DMA memory to be released
3972 * Unmap all mapped DMA memory associated with this command.
3975 * spin_lock_irqsave(host lock)
3977 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3979 struct ata_port
*ap
= qc
->ap
;
3980 struct scatterlist
*sg
= qc
->__sg
;
3981 int dir
= qc
->dma_dir
;
3982 void *pad_buf
= NULL
;
3984 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3985 WARN_ON(sg
== NULL
);
3987 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3988 WARN_ON(qc
->n_elem
> 1);
3990 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3992 /* if we padded the buffer out to 32-bit bound, and data
3993 * xfer direction is from-device, we must copy from the
3994 * pad buffer back into the supplied buffer
3996 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3997 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3999 if (qc
->flags
& ATA_QCFLAG_SG
) {
4001 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4002 /* restore last sg */
4003 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4005 struct scatterlist
*psg
= &qc
->pad_sgent
;
4006 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4007 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4008 kunmap_atomic(addr
, KM_IRQ0
);
4012 dma_unmap_single(ap
->dev
,
4013 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4016 sg
->length
+= qc
->pad_len
;
4018 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4019 pad_buf
, qc
->pad_len
);
4022 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4027 * ata_fill_sg - Fill PCI IDE PRD table
4028 * @qc: Metadata associated with taskfile to be transferred
4030 * Fill PCI IDE PRD (scatter-gather) table with segments
4031 * associated with the current disk command.
4034 * spin_lock_irqsave(host lock)
4037 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4039 struct ata_port
*ap
= qc
->ap
;
4040 struct scatterlist
*sg
;
4043 WARN_ON(qc
->__sg
== NULL
);
4044 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4047 ata_for_each_sg(sg
, qc
) {
4051 /* determine if physical DMA addr spans 64K boundary.
4052 * Note h/w doesn't support 64-bit, so we unconditionally
4053 * truncate dma_addr_t to u32.
4055 addr
= (u32
) sg_dma_address(sg
);
4056 sg_len
= sg_dma_len(sg
);
4059 offset
= addr
& 0xffff;
4061 if ((offset
+ sg_len
) > 0x10000)
4062 len
= 0x10000 - offset
;
4064 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4065 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4066 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4075 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4079 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4080 * @qc: Metadata associated with taskfile to be transferred
4082 * Fill PCI IDE PRD (scatter-gather) table with segments
4083 * associated with the current disk command. Perform the fill
4084 * so that we avoid writing any length 64K records for
4085 * controllers that don't follow the spec.
4088 * spin_lock_irqsave(host lock)
4091 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4093 struct ata_port
*ap
= qc
->ap
;
4094 struct scatterlist
*sg
;
4097 WARN_ON(qc
->__sg
== NULL
);
4098 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4101 ata_for_each_sg(sg
, qc
) {
4103 u32 sg_len
, len
, blen
;
4105 /* determine if physical DMA addr spans 64K boundary.
4106 * Note h/w doesn't support 64-bit, so we unconditionally
4107 * truncate dma_addr_t to u32.
4109 addr
= (u32
) sg_dma_address(sg
);
4110 sg_len
= sg_dma_len(sg
);
4113 offset
= addr
& 0xffff;
4115 if ((offset
+ sg_len
) > 0x10000)
4116 len
= 0x10000 - offset
;
4118 blen
= len
& 0xffff;
4119 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4121 /* Some PATA chipsets like the CS5530 can't
4122 cope with 0x0000 meaning 64K as the spec says */
4123 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4125 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4127 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4128 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4137 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4141 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4142 * @qc: Metadata associated with taskfile to check
4144 * Allow low-level driver to filter ATA PACKET commands, returning
4145 * a status indicating whether or not it is OK to use DMA for the
4146 * supplied PACKET command.
4149 * spin_lock_irqsave(host lock)
4151 * RETURNS: 0 when ATAPI DMA can be used
4154 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4156 struct ata_port
*ap
= qc
->ap
;
4158 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4159 * few ATAPI devices choke on such DMA requests.
4161 if (unlikely(qc
->nbytes
& 15))
4164 if (ap
->ops
->check_atapi_dma
)
4165 return ap
->ops
->check_atapi_dma(qc
);
4171 * ata_qc_prep - Prepare taskfile for submission
4172 * @qc: Metadata associated with taskfile to be prepared
4174 * Prepare ATA taskfile for submission.
4177 * spin_lock_irqsave(host lock)
4179 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4181 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4188 * ata_dumb_qc_prep - Prepare taskfile for submission
4189 * @qc: Metadata associated with taskfile to be prepared
4191 * Prepare ATA taskfile for submission.
4194 * spin_lock_irqsave(host lock)
4196 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4198 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4201 ata_fill_sg_dumb(qc
);
4204 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4207 * ata_sg_init_one - Associate command with memory buffer
4208 * @qc: Command to be associated
4209 * @buf: Memory buffer
4210 * @buflen: Length of memory buffer, in bytes.
4212 * Initialize the data-related elements of queued_cmd @qc
4213 * to point to a single memory buffer, @buf of byte length @buflen.
4216 * spin_lock_irqsave(host lock)
4219 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4221 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4223 qc
->__sg
= &qc
->sgent
;
4225 qc
->orig_n_elem
= 1;
4227 qc
->nbytes
= buflen
;
4229 sg_init_one(&qc
->sgent
, buf
, buflen
);
4233 * ata_sg_init - Associate command with scatter-gather table.
4234 * @qc: Command to be associated
4235 * @sg: Scatter-gather table.
4236 * @n_elem: Number of elements in s/g table.
4238 * Initialize the data-related elements of queued_cmd @qc
4239 * to point to a scatter-gather table @sg, containing @n_elem
4243 * spin_lock_irqsave(host lock)
4246 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4247 unsigned int n_elem
)
4249 qc
->flags
|= ATA_QCFLAG_SG
;
4251 qc
->n_elem
= n_elem
;
4252 qc
->orig_n_elem
= n_elem
;
4256 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4257 * @qc: Command with memory buffer to be mapped.
4259 * DMA-map the memory buffer associated with queued_cmd @qc.
4262 * spin_lock_irqsave(host lock)
4265 * Zero on success, negative on error.
4268 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4270 struct ata_port
*ap
= qc
->ap
;
4271 int dir
= qc
->dma_dir
;
4272 struct scatterlist
*sg
= qc
->__sg
;
4273 dma_addr_t dma_address
;
4276 /* we must lengthen transfers to end on a 32-bit boundary */
4277 qc
->pad_len
= sg
->length
& 3;
4279 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4280 struct scatterlist
*psg
= &qc
->pad_sgent
;
4282 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4284 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4286 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4287 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4290 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4291 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4293 sg
->length
-= qc
->pad_len
;
4294 if (sg
->length
== 0)
4297 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4298 sg
->length
, qc
->pad_len
);
4306 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4308 if (dma_mapping_error(dma_address
)) {
4310 sg
->length
+= qc
->pad_len
;
4314 sg_dma_address(sg
) = dma_address
;
4315 sg_dma_len(sg
) = sg
->length
;
4318 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4319 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4325 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4326 * @qc: Command with scatter-gather table to be mapped.
4328 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4331 * spin_lock_irqsave(host lock)
4334 * Zero on success, negative on error.
4338 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4340 struct ata_port
*ap
= qc
->ap
;
4341 struct scatterlist
*sg
= qc
->__sg
;
4342 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4343 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4345 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4346 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4348 /* we must lengthen transfers to end on a 32-bit boundary */
4349 qc
->pad_len
= lsg
->length
& 3;
4351 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4352 struct scatterlist
*psg
= &qc
->pad_sgent
;
4353 unsigned int offset
;
4355 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4357 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4360 * psg->page/offset are used to copy to-be-written
4361 * data in this function or read data in ata_sg_clean.
4363 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4364 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4365 psg
->offset
= offset_in_page(offset
);
4367 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4368 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4369 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4370 kunmap_atomic(addr
, KM_IRQ0
);
4373 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4374 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4376 lsg
->length
-= qc
->pad_len
;
4377 if (lsg
->length
== 0)
4380 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4381 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4384 pre_n_elem
= qc
->n_elem
;
4385 if (trim_sg
&& pre_n_elem
)
4394 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4396 /* restore last sg */
4397 lsg
->length
+= qc
->pad_len
;
4401 DPRINTK("%d sg elements mapped\n", n_elem
);
4404 qc
->n_elem
= n_elem
;
4410 * swap_buf_le16 - swap halves of 16-bit words in place
4411 * @buf: Buffer to swap
4412 * @buf_words: Number of 16-bit words in buffer.
4414 * Swap halves of 16-bit words if needed to convert from
4415 * little-endian byte order to native cpu byte order, or
4419 * Inherited from caller.
4421 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4426 for (i
= 0; i
< buf_words
; i
++)
4427 buf
[i
] = le16_to_cpu(buf
[i
]);
4428 #endif /* __BIG_ENDIAN */
4432 * ata_data_xfer - Transfer data by PIO
4433 * @adev: device to target
4435 * @buflen: buffer length
4436 * @write_data: read/write
4438 * Transfer data from/to the device data register by PIO.
4441 * Inherited from caller.
4443 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4444 unsigned int buflen
, int write_data
)
4446 struct ata_port
*ap
= adev
->ap
;
4447 unsigned int words
= buflen
>> 1;
4449 /* Transfer multiple of 2 bytes */
4451 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4453 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4455 /* Transfer trailing 1 byte, if any. */
4456 if (unlikely(buflen
& 0x01)) {
4457 u16 align_buf
[1] = { 0 };
4458 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4461 memcpy(align_buf
, trailing_buf
, 1);
4462 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4464 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4465 memcpy(trailing_buf
, align_buf
, 1);
4471 * ata_data_xfer_noirq - Transfer data by PIO
4472 * @adev: device to target
4474 * @buflen: buffer length
4475 * @write_data: read/write
4477 * Transfer data from/to the device data register by PIO. Do the
4478 * transfer with interrupts disabled.
4481 * Inherited from caller.
4483 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4484 unsigned int buflen
, int write_data
)
4486 unsigned long flags
;
4487 local_irq_save(flags
);
4488 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4489 local_irq_restore(flags
);
4494 * ata_pio_sector - Transfer a sector of data.
4495 * @qc: Command on going
4497 * Transfer qc->sect_size bytes of data from/to the ATA device.
4500 * Inherited from caller.
4503 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4505 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4506 struct scatterlist
*sg
= qc
->__sg
;
4507 struct ata_port
*ap
= qc
->ap
;
4509 unsigned int offset
;
4512 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4513 ap
->hsm_task_state
= HSM_ST_LAST
;
4515 page
= sg
[qc
->cursg
].page
;
4516 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4518 /* get the current page and offset */
4519 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4520 offset
%= PAGE_SIZE
;
4522 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4524 if (PageHighMem(page
)) {
4525 unsigned long flags
;
4527 /* FIXME: use a bounce buffer */
4528 local_irq_save(flags
);
4529 buf
= kmap_atomic(page
, KM_IRQ0
);
4531 /* do the actual data transfer */
4532 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4534 kunmap_atomic(buf
, KM_IRQ0
);
4535 local_irq_restore(flags
);
4537 buf
= page_address(page
);
4538 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4541 qc
->curbytes
+= qc
->sect_size
;
4542 qc
->cursg_ofs
+= qc
->sect_size
;
4544 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4551 * ata_pio_sectors - Transfer one or many sectors.
4552 * @qc: Command on going
4554 * Transfer one or many sectors of data from/to the
4555 * ATA device for the DRQ request.
4558 * Inherited from caller.
4561 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4563 if (is_multi_taskfile(&qc
->tf
)) {
4564 /* READ/WRITE MULTIPLE */
4567 WARN_ON(qc
->dev
->multi_count
== 0);
4569 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4570 qc
->dev
->multi_count
);
4578 * atapi_send_cdb - Write CDB bytes to hardware
4579 * @ap: Port to which ATAPI device is attached.
4580 * @qc: Taskfile currently active
4582 * When device has indicated its readiness to accept
4583 * a CDB, this function is called. Send the CDB.
4589 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4592 DPRINTK("send cdb\n");
4593 WARN_ON(qc
->dev
->cdb_len
< 12);
4595 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4596 ata_altstatus(ap
); /* flush */
4598 switch (qc
->tf
.protocol
) {
4599 case ATA_PROT_ATAPI
:
4600 ap
->hsm_task_state
= HSM_ST
;
4602 case ATA_PROT_ATAPI_NODATA
:
4603 ap
->hsm_task_state
= HSM_ST_LAST
;
4605 case ATA_PROT_ATAPI_DMA
:
4606 ap
->hsm_task_state
= HSM_ST_LAST
;
4607 /* initiate bmdma */
4608 ap
->ops
->bmdma_start(qc
);
4614 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4615 * @qc: Command on going
4616 * @bytes: number of bytes
4618 * Transfer Transfer data from/to the ATAPI device.
4621 * Inherited from caller.
4625 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4627 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4628 struct scatterlist
*sg
= qc
->__sg
;
4629 struct ata_port
*ap
= qc
->ap
;
4632 unsigned int offset
, count
;
4634 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4635 ap
->hsm_task_state
= HSM_ST_LAST
;
4638 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4640 * The end of qc->sg is reached and the device expects
4641 * more data to transfer. In order not to overrun qc->sg
4642 * and fulfill length specified in the byte count register,
4643 * - for read case, discard trailing data from the device
4644 * - for write case, padding zero data to the device
4646 u16 pad_buf
[1] = { 0 };
4647 unsigned int words
= bytes
>> 1;
4650 if (words
) /* warning if bytes > 1 */
4651 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4652 "%u bytes trailing data\n", bytes
);
4654 for (i
= 0; i
< words
; i
++)
4655 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4657 ap
->hsm_task_state
= HSM_ST_LAST
;
4661 sg
= &qc
->__sg
[qc
->cursg
];
4664 offset
= sg
->offset
+ qc
->cursg_ofs
;
4666 /* get the current page and offset */
4667 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4668 offset
%= PAGE_SIZE
;
4670 /* don't overrun current sg */
4671 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4673 /* don't cross page boundaries */
4674 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4676 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4678 if (PageHighMem(page
)) {
4679 unsigned long flags
;
4681 /* FIXME: use bounce buffer */
4682 local_irq_save(flags
);
4683 buf
= kmap_atomic(page
, KM_IRQ0
);
4685 /* do the actual data transfer */
4686 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4688 kunmap_atomic(buf
, KM_IRQ0
);
4689 local_irq_restore(flags
);
4691 buf
= page_address(page
);
4692 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4696 qc
->curbytes
+= count
;
4697 qc
->cursg_ofs
+= count
;
4699 if (qc
->cursg_ofs
== sg
->length
) {
4709 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4710 * @qc: Command on going
4712 * Transfer Transfer data from/to the ATAPI device.
4715 * Inherited from caller.
4718 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4720 struct ata_port
*ap
= qc
->ap
;
4721 struct ata_device
*dev
= qc
->dev
;
4722 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4723 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4725 /* Abuse qc->result_tf for temp storage of intermediate TF
4726 * here to save some kernel stack usage.
4727 * For normal completion, qc->result_tf is not relevant. For
4728 * error, qc->result_tf is later overwritten by ata_qc_complete().
4729 * So, the correctness of qc->result_tf is not affected.
4731 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4732 ireason
= qc
->result_tf
.nsect
;
4733 bc_lo
= qc
->result_tf
.lbam
;
4734 bc_hi
= qc
->result_tf
.lbah
;
4735 bytes
= (bc_hi
<< 8) | bc_lo
;
4737 /* shall be cleared to zero, indicating xfer of data */
4738 if (ireason
& (1 << 0))
4741 /* make sure transfer direction matches expected */
4742 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4743 if (do_write
!= i_write
)
4746 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4748 __atapi_pio_bytes(qc
, bytes
);
4753 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4754 qc
->err_mask
|= AC_ERR_HSM
;
4755 ap
->hsm_task_state
= HSM_ST_ERR
;
4759 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4760 * @ap: the target ata_port
4764 * 1 if ok in workqueue, 0 otherwise.
4767 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4769 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4772 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4773 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4774 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4777 if (is_atapi_taskfile(&qc
->tf
) &&
4778 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4786 * ata_hsm_qc_complete - finish a qc running on standard HSM
4787 * @qc: Command to complete
4788 * @in_wq: 1 if called from workqueue, 0 otherwise
4790 * Finish @qc which is running on standard HSM.
4793 * If @in_wq is zero, spin_lock_irqsave(host lock).
4794 * Otherwise, none on entry and grabs host lock.
4796 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4798 struct ata_port
*ap
= qc
->ap
;
4799 unsigned long flags
;
4801 if (ap
->ops
->error_handler
) {
4803 spin_lock_irqsave(ap
->lock
, flags
);
4805 /* EH might have kicked in while host lock is
4808 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4810 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4811 ap
->ops
->irq_on(ap
);
4812 ata_qc_complete(qc
);
4814 ata_port_freeze(ap
);
4817 spin_unlock_irqrestore(ap
->lock
, flags
);
4819 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4820 ata_qc_complete(qc
);
4822 ata_port_freeze(ap
);
4826 spin_lock_irqsave(ap
->lock
, flags
);
4827 ap
->ops
->irq_on(ap
);
4828 ata_qc_complete(qc
);
4829 spin_unlock_irqrestore(ap
->lock
, flags
);
4831 ata_qc_complete(qc
);
4836 * ata_hsm_move - move the HSM to the next state.
4837 * @ap: the target ata_port
4839 * @status: current device status
4840 * @in_wq: 1 if called from workqueue, 0 otherwise
4843 * 1 when poll next status needed, 0 otherwise.
4845 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4846 u8 status
, int in_wq
)
4848 unsigned long flags
= 0;
4851 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4853 /* Make sure ata_qc_issue_prot() does not throw things
4854 * like DMA polling into the workqueue. Notice that
4855 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4857 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4860 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4861 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4863 switch (ap
->hsm_task_state
) {
4865 /* Send first data block or PACKET CDB */
4867 /* If polling, we will stay in the work queue after
4868 * sending the data. Otherwise, interrupt handler
4869 * takes over after sending the data.
4871 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4873 /* check device status */
4874 if (unlikely((status
& ATA_DRQ
) == 0)) {
4875 /* handle BSY=0, DRQ=0 as error */
4876 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4877 /* device stops HSM for abort/error */
4878 qc
->err_mask
|= AC_ERR_DEV
;
4880 /* HSM violation. Let EH handle this */
4881 qc
->err_mask
|= AC_ERR_HSM
;
4883 ap
->hsm_task_state
= HSM_ST_ERR
;
4887 /* Device should not ask for data transfer (DRQ=1)
4888 * when it finds something wrong.
4889 * We ignore DRQ here and stop the HSM by
4890 * changing hsm_task_state to HSM_ST_ERR and
4891 * let the EH abort the command or reset the device.
4893 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4894 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4895 "error, dev_stat 0x%X\n", status
);
4896 qc
->err_mask
|= AC_ERR_HSM
;
4897 ap
->hsm_task_state
= HSM_ST_ERR
;
4901 /* Send the CDB (atapi) or the first data block (ata pio out).
4902 * During the state transition, interrupt handler shouldn't
4903 * be invoked before the data transfer is complete and
4904 * hsm_task_state is changed. Hence, the following locking.
4907 spin_lock_irqsave(ap
->lock
, flags
);
4909 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4910 /* PIO data out protocol.
4911 * send first data block.
4914 /* ata_pio_sectors() might change the state
4915 * to HSM_ST_LAST. so, the state is changed here
4916 * before ata_pio_sectors().
4918 ap
->hsm_task_state
= HSM_ST
;
4919 ata_pio_sectors(qc
);
4920 ata_altstatus(ap
); /* flush */
4923 atapi_send_cdb(ap
, qc
);
4926 spin_unlock_irqrestore(ap
->lock
, flags
);
4928 /* if polling, ata_pio_task() handles the rest.
4929 * otherwise, interrupt handler takes over from here.
4934 /* complete command or read/write the data register */
4935 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4936 /* ATAPI PIO protocol */
4937 if ((status
& ATA_DRQ
) == 0) {
4938 /* No more data to transfer or device error.
4939 * Device error will be tagged in HSM_ST_LAST.
4941 ap
->hsm_task_state
= HSM_ST_LAST
;
4945 /* Device should not ask for data transfer (DRQ=1)
4946 * when it finds something wrong.
4947 * We ignore DRQ here and stop the HSM by
4948 * changing hsm_task_state to HSM_ST_ERR and
4949 * let the EH abort the command or reset the device.
4951 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4952 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
4953 "device error, dev_stat 0x%X\n",
4955 qc
->err_mask
|= AC_ERR_HSM
;
4956 ap
->hsm_task_state
= HSM_ST_ERR
;
4960 atapi_pio_bytes(qc
);
4962 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4963 /* bad ireason reported by device */
4967 /* ATA PIO protocol */
4968 if (unlikely((status
& ATA_DRQ
) == 0)) {
4969 /* handle BSY=0, DRQ=0 as error */
4970 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4971 /* device stops HSM for abort/error */
4972 qc
->err_mask
|= AC_ERR_DEV
;
4974 /* HSM violation. Let EH handle this.
4975 * Phantom devices also trigger this
4976 * condition. Mark hint.
4978 qc
->err_mask
|= AC_ERR_HSM
|
4981 ap
->hsm_task_state
= HSM_ST_ERR
;
4985 /* For PIO reads, some devices may ask for
4986 * data transfer (DRQ=1) alone with ERR=1.
4987 * We respect DRQ here and transfer one
4988 * block of junk data before changing the
4989 * hsm_task_state to HSM_ST_ERR.
4991 * For PIO writes, ERR=1 DRQ=1 doesn't make
4992 * sense since the data block has been
4993 * transferred to the device.
4995 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4996 /* data might be corrputed */
4997 qc
->err_mask
|= AC_ERR_DEV
;
4999 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5000 ata_pio_sectors(qc
);
5002 status
= ata_wait_idle(ap
);
5005 if (status
& (ATA_BUSY
| ATA_DRQ
))
5006 qc
->err_mask
|= AC_ERR_HSM
;
5008 /* ata_pio_sectors() might change the
5009 * state to HSM_ST_LAST. so, the state
5010 * is changed after ata_pio_sectors().
5012 ap
->hsm_task_state
= HSM_ST_ERR
;
5016 ata_pio_sectors(qc
);
5018 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5019 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5022 status
= ata_wait_idle(ap
);
5027 ata_altstatus(ap
); /* flush */
5032 if (unlikely(!ata_ok(status
))) {
5033 qc
->err_mask
|= __ac_err_mask(status
);
5034 ap
->hsm_task_state
= HSM_ST_ERR
;
5038 /* no more data to transfer */
5039 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5040 ap
->print_id
, qc
->dev
->devno
, status
);
5042 WARN_ON(qc
->err_mask
);
5044 ap
->hsm_task_state
= HSM_ST_IDLE
;
5046 /* complete taskfile transaction */
5047 ata_hsm_qc_complete(qc
, in_wq
);
5053 /* make sure qc->err_mask is available to
5054 * know what's wrong and recover
5056 WARN_ON(qc
->err_mask
== 0);
5058 ap
->hsm_task_state
= HSM_ST_IDLE
;
5060 /* complete taskfile transaction */
5061 ata_hsm_qc_complete(qc
, in_wq
);
5073 static void ata_pio_task(struct work_struct
*work
)
5075 struct ata_port
*ap
=
5076 container_of(work
, struct ata_port
, port_task
.work
);
5077 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5082 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5085 * This is purely heuristic. This is a fast path.
5086 * Sometimes when we enter, BSY will be cleared in
5087 * a chk-status or two. If not, the drive is probably seeking
5088 * or something. Snooze for a couple msecs, then
5089 * chk-status again. If still busy, queue delayed work.
5091 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5092 if (status
& ATA_BUSY
) {
5094 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5095 if (status
& ATA_BUSY
) {
5096 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5102 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5104 /* another command or interrupt handler
5105 * may be running at this point.
5112 * ata_qc_new - Request an available ATA command, for queueing
5113 * @ap: Port associated with device @dev
5114 * @dev: Device from whom we request an available command structure
5120 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5122 struct ata_queued_cmd
*qc
= NULL
;
5125 /* no command while frozen */
5126 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5129 /* the last tag is reserved for internal command. */
5130 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5131 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5132 qc
= __ata_qc_from_tag(ap
, i
);
5143 * ata_qc_new_init - Request an available ATA command, and initialize it
5144 * @dev: Device from whom we request an available command structure
5150 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5152 struct ata_port
*ap
= dev
->ap
;
5153 struct ata_queued_cmd
*qc
;
5155 qc
= ata_qc_new(ap
);
5168 * ata_qc_free - free unused ata_queued_cmd
5169 * @qc: Command to complete
5171 * Designed to free unused ata_queued_cmd object
5172 * in case something prevents using it.
5175 * spin_lock_irqsave(host lock)
5177 void ata_qc_free(struct ata_queued_cmd
*qc
)
5179 struct ata_port
*ap
= qc
->ap
;
5182 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5186 if (likely(ata_tag_valid(tag
))) {
5187 qc
->tag
= ATA_TAG_POISON
;
5188 clear_bit(tag
, &ap
->qc_allocated
);
5192 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5194 struct ata_port
*ap
= qc
->ap
;
5196 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5197 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5199 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5202 /* command should be marked inactive atomically with qc completion */
5203 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
5204 ap
->sactive
&= ~(1 << qc
->tag
);
5206 ap
->active_tag
= ATA_TAG_POISON
;
5208 /* atapi: mark qc as inactive to prevent the interrupt handler
5209 * from completing the command twice later, before the error handler
5210 * is called. (when rc != 0 and atapi request sense is needed)
5212 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5213 ap
->qc_active
&= ~(1 << qc
->tag
);
5215 /* call completion callback */
5216 qc
->complete_fn(qc
);
5219 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5221 struct ata_port
*ap
= qc
->ap
;
5223 qc
->result_tf
.flags
= qc
->tf
.flags
;
5224 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5228 * ata_qc_complete - Complete an active ATA command
5229 * @qc: Command to complete
5230 * @err_mask: ATA Status register contents
5232 * Indicate to the mid and upper layers that an ATA
5233 * command has completed, with either an ok or not-ok status.
5236 * spin_lock_irqsave(host lock)
5238 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5240 struct ata_port
*ap
= qc
->ap
;
5242 /* XXX: New EH and old EH use different mechanisms to
5243 * synchronize EH with regular execution path.
5245 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5246 * Normal execution path is responsible for not accessing a
5247 * failed qc. libata core enforces the rule by returning NULL
5248 * from ata_qc_from_tag() for failed qcs.
5250 * Old EH depends on ata_qc_complete() nullifying completion
5251 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5252 * not synchronize with interrupt handler. Only PIO task is
5255 if (ap
->ops
->error_handler
) {
5256 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5258 if (unlikely(qc
->err_mask
))
5259 qc
->flags
|= ATA_QCFLAG_FAILED
;
5261 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5262 if (!ata_tag_internal(qc
->tag
)) {
5263 /* always fill result TF for failed qc */
5265 ata_qc_schedule_eh(qc
);
5270 /* read result TF if requested */
5271 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5274 __ata_qc_complete(qc
);
5276 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5279 /* read result TF if failed or requested */
5280 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5283 __ata_qc_complete(qc
);
5288 * ata_qc_complete_multiple - Complete multiple qcs successfully
5289 * @ap: port in question
5290 * @qc_active: new qc_active mask
5291 * @finish_qc: LLDD callback invoked before completing a qc
5293 * Complete in-flight commands. This functions is meant to be
5294 * called from low-level driver's interrupt routine to complete
5295 * requests normally. ap->qc_active and @qc_active is compared
5296 * and commands are completed accordingly.
5299 * spin_lock_irqsave(host lock)
5302 * Number of completed commands on success, -errno otherwise.
5304 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5305 void (*finish_qc
)(struct ata_queued_cmd
*))
5311 done_mask
= ap
->qc_active
^ qc_active
;
5313 if (unlikely(done_mask
& qc_active
)) {
5314 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5315 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5319 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5320 struct ata_queued_cmd
*qc
;
5322 if (!(done_mask
& (1 << i
)))
5325 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5328 ata_qc_complete(qc
);
5336 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5338 struct ata_port
*ap
= qc
->ap
;
5340 switch (qc
->tf
.protocol
) {
5343 case ATA_PROT_ATAPI_DMA
:
5346 case ATA_PROT_ATAPI
:
5348 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5361 * ata_qc_issue - issue taskfile to device
5362 * @qc: command to issue to device
5364 * Prepare an ATA command to submission to device.
5365 * This includes mapping the data into a DMA-able
5366 * area, filling in the S/G table, and finally
5367 * writing the taskfile to hardware, starting the command.
5370 * spin_lock_irqsave(host lock)
5372 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5374 struct ata_port
*ap
= qc
->ap
;
5376 /* Make sure only one non-NCQ command is outstanding. The
5377 * check is skipped for old EH because it reuses active qc to
5378 * request ATAPI sense.
5380 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
5382 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5383 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
5384 ap
->sactive
|= 1 << qc
->tag
;
5386 WARN_ON(ap
->sactive
);
5387 ap
->active_tag
= qc
->tag
;
5390 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5391 ap
->qc_active
|= 1 << qc
->tag
;
5393 if (ata_should_dma_map(qc
)) {
5394 if (qc
->flags
& ATA_QCFLAG_SG
) {
5395 if (ata_sg_setup(qc
))
5397 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5398 if (ata_sg_setup_one(qc
))
5402 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5405 ap
->ops
->qc_prep(qc
);
5407 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5408 if (unlikely(qc
->err_mask
))
5413 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5414 qc
->err_mask
|= AC_ERR_SYSTEM
;
5416 ata_qc_complete(qc
);
5420 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5421 * @qc: command to issue to device
5423 * Using various libata functions and hooks, this function
5424 * starts an ATA command. ATA commands are grouped into
5425 * classes called "protocols", and issuing each type of protocol
5426 * is slightly different.
5428 * May be used as the qc_issue() entry in ata_port_operations.
5431 * spin_lock_irqsave(host lock)
5434 * Zero on success, AC_ERR_* mask on failure
5437 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5439 struct ata_port
*ap
= qc
->ap
;
5441 /* Use polling pio if the LLD doesn't handle
5442 * interrupt driven pio and atapi CDB interrupt.
5444 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5445 switch (qc
->tf
.protocol
) {
5447 case ATA_PROT_NODATA
:
5448 case ATA_PROT_ATAPI
:
5449 case ATA_PROT_ATAPI_NODATA
:
5450 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5452 case ATA_PROT_ATAPI_DMA
:
5453 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5454 /* see ata_dma_blacklisted() */
5462 /* select the device */
5463 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5465 /* start the command */
5466 switch (qc
->tf
.protocol
) {
5467 case ATA_PROT_NODATA
:
5468 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5469 ata_qc_set_polling(qc
);
5471 ata_tf_to_host(ap
, &qc
->tf
);
5472 ap
->hsm_task_state
= HSM_ST_LAST
;
5474 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5475 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5480 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5482 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5483 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5484 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5485 ap
->hsm_task_state
= HSM_ST_LAST
;
5489 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5490 ata_qc_set_polling(qc
);
5492 ata_tf_to_host(ap
, &qc
->tf
);
5494 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5495 /* PIO data out protocol */
5496 ap
->hsm_task_state
= HSM_ST_FIRST
;
5497 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5499 /* always send first data block using
5500 * the ata_pio_task() codepath.
5503 /* PIO data in protocol */
5504 ap
->hsm_task_state
= HSM_ST
;
5506 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5507 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5509 /* if polling, ata_pio_task() handles the rest.
5510 * otherwise, interrupt handler takes over from here.
5516 case ATA_PROT_ATAPI
:
5517 case ATA_PROT_ATAPI_NODATA
:
5518 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5519 ata_qc_set_polling(qc
);
5521 ata_tf_to_host(ap
, &qc
->tf
);
5523 ap
->hsm_task_state
= HSM_ST_FIRST
;
5525 /* send cdb by polling if no cdb interrupt */
5526 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5527 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5528 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5531 case ATA_PROT_ATAPI_DMA
:
5532 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5534 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5535 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5536 ap
->hsm_task_state
= HSM_ST_FIRST
;
5538 /* send cdb by polling if no cdb interrupt */
5539 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5540 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5545 return AC_ERR_SYSTEM
;
5552 * ata_host_intr - Handle host interrupt for given (port, task)
5553 * @ap: Port on which interrupt arrived (possibly...)
5554 * @qc: Taskfile currently active in engine
5556 * Handle host interrupt for given queued command. Currently,
5557 * only DMA interrupts are handled. All other commands are
5558 * handled via polling with interrupts disabled (nIEN bit).
5561 * spin_lock_irqsave(host lock)
5564 * One if interrupt was handled, zero if not (shared irq).
5567 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5568 struct ata_queued_cmd
*qc
)
5570 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5571 u8 status
, host_stat
= 0;
5573 VPRINTK("ata%u: protocol %d task_state %d\n",
5574 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5576 /* Check whether we are expecting interrupt in this state */
5577 switch (ap
->hsm_task_state
) {
5579 /* Some pre-ATAPI-4 devices assert INTRQ
5580 * at this state when ready to receive CDB.
5583 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5584 * The flag was turned on only for atapi devices.
5585 * No need to check is_atapi_taskfile(&qc->tf) again.
5587 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5591 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5592 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5593 /* check status of DMA engine */
5594 host_stat
= ap
->ops
->bmdma_status(ap
);
5595 VPRINTK("ata%u: host_stat 0x%X\n",
5596 ap
->print_id
, host_stat
);
5598 /* if it's not our irq... */
5599 if (!(host_stat
& ATA_DMA_INTR
))
5602 /* before we do anything else, clear DMA-Start bit */
5603 ap
->ops
->bmdma_stop(qc
);
5605 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5606 /* error when transfering data to/from memory */
5607 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5608 ap
->hsm_task_state
= HSM_ST_ERR
;
5618 /* check altstatus */
5619 status
= ata_altstatus(ap
);
5620 if (status
& ATA_BUSY
)
5623 /* check main status, clearing INTRQ */
5624 status
= ata_chk_status(ap
);
5625 if (unlikely(status
& ATA_BUSY
))
5628 /* ack bmdma irq events */
5629 ap
->ops
->irq_clear(ap
);
5631 ata_hsm_move(ap
, qc
, status
, 0);
5633 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5634 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5635 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5637 return 1; /* irq handled */
5640 ap
->stats
.idle_irq
++;
5643 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5644 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5645 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5649 return 0; /* irq not handled */
5653 * ata_interrupt - Default ATA host interrupt handler
5654 * @irq: irq line (unused)
5655 * @dev_instance: pointer to our ata_host information structure
5657 * Default interrupt handler for PCI IDE devices. Calls
5658 * ata_host_intr() for each port that is not disabled.
5661 * Obtains host lock during operation.
5664 * IRQ_NONE or IRQ_HANDLED.
5667 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5669 struct ata_host
*host
= dev_instance
;
5671 unsigned int handled
= 0;
5672 unsigned long flags
;
5674 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5675 spin_lock_irqsave(&host
->lock
, flags
);
5677 for (i
= 0; i
< host
->n_ports
; i
++) {
5678 struct ata_port
*ap
;
5680 ap
= host
->ports
[i
];
5682 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5683 struct ata_queued_cmd
*qc
;
5685 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5686 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5687 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5688 handled
|= ata_host_intr(ap
, qc
);
5692 spin_unlock_irqrestore(&host
->lock
, flags
);
5694 return IRQ_RETVAL(handled
);
5698 * sata_scr_valid - test whether SCRs are accessible
5699 * @ap: ATA port to test SCR accessibility for
5701 * Test whether SCRs are accessible for @ap.
5707 * 1 if SCRs are accessible, 0 otherwise.
5709 int sata_scr_valid(struct ata_port
*ap
)
5711 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5715 * sata_scr_read - read SCR register of the specified port
5716 * @ap: ATA port to read SCR for
5718 * @val: Place to store read value
5720 * Read SCR register @reg of @ap into *@val. This function is
5721 * guaranteed to succeed if the cable type of the port is SATA
5722 * and the port implements ->scr_read.
5728 * 0 on success, negative errno on failure.
5730 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5732 if (sata_scr_valid(ap
)) {
5733 *val
= ap
->ops
->scr_read(ap
, reg
);
5740 * sata_scr_write - write SCR register of the specified port
5741 * @ap: ATA port to write SCR for
5742 * @reg: SCR to write
5743 * @val: value to write
5745 * Write @val to SCR register @reg of @ap. This function is
5746 * guaranteed to succeed if the cable type of the port is SATA
5747 * and the port implements ->scr_read.
5753 * 0 on success, negative errno on failure.
5755 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5757 if (sata_scr_valid(ap
)) {
5758 ap
->ops
->scr_write(ap
, reg
, val
);
5765 * sata_scr_write_flush - write SCR register of the specified port and flush
5766 * @ap: ATA port to write SCR for
5767 * @reg: SCR to write
5768 * @val: value to write
5770 * This function is identical to sata_scr_write() except that this
5771 * function performs flush after writing to the register.
5777 * 0 on success, negative errno on failure.
5779 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5781 if (sata_scr_valid(ap
)) {
5782 ap
->ops
->scr_write(ap
, reg
, val
);
5783 ap
->ops
->scr_read(ap
, reg
);
5790 * ata_port_online - test whether the given port is online
5791 * @ap: ATA port to test
5793 * Test whether @ap is online. Note that this function returns 0
5794 * if online status of @ap cannot be obtained, so
5795 * ata_port_online(ap) != !ata_port_offline(ap).
5801 * 1 if the port online status is available and online.
5803 int ata_port_online(struct ata_port
*ap
)
5807 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5813 * ata_port_offline - test whether the given port is offline
5814 * @ap: ATA port to test
5816 * Test whether @ap is offline. Note that this function returns
5817 * 0 if offline status of @ap cannot be obtained, so
5818 * ata_port_online(ap) != !ata_port_offline(ap).
5824 * 1 if the port offline status is available and offline.
5826 int ata_port_offline(struct ata_port
*ap
)
5830 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5835 int ata_flush_cache(struct ata_device
*dev
)
5837 unsigned int err_mask
;
5840 if (!ata_try_flush_cache(dev
))
5843 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5844 cmd
= ATA_CMD_FLUSH_EXT
;
5846 cmd
= ATA_CMD_FLUSH
;
5848 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5850 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5858 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5859 unsigned int action
, unsigned int ehi_flags
,
5862 unsigned long flags
;
5865 for (i
= 0; i
< host
->n_ports
; i
++) {
5866 struct ata_port
*ap
= host
->ports
[i
];
5868 /* Previous resume operation might still be in
5869 * progress. Wait for PM_PENDING to clear.
5871 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5872 ata_port_wait_eh(ap
);
5873 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5876 /* request PM ops to EH */
5877 spin_lock_irqsave(ap
->lock
, flags
);
5882 ap
->pm_result
= &rc
;
5885 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5886 ap
->eh_info
.action
|= action
;
5887 ap
->eh_info
.flags
|= ehi_flags
;
5889 ata_port_schedule_eh(ap
);
5891 spin_unlock_irqrestore(ap
->lock
, flags
);
5893 /* wait and check result */
5895 ata_port_wait_eh(ap
);
5896 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5906 * ata_host_suspend - suspend host
5907 * @host: host to suspend
5910 * Suspend @host. Actual operation is performed by EH. This
5911 * function requests EH to perform PM operations and waits for EH
5915 * Kernel thread context (may sleep).
5918 * 0 on success, -errno on failure.
5920 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5924 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5926 host
->dev
->power
.power_state
= mesg
;
5931 * ata_host_resume - resume host
5932 * @host: host to resume
5934 * Resume @host. Actual operation is performed by EH. This
5935 * function requests EH to perform PM operations and returns.
5936 * Note that all resume operations are performed parallely.
5939 * Kernel thread context (may sleep).
5941 void ata_host_resume(struct ata_host
*host
)
5943 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5944 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5945 host
->dev
->power
.power_state
= PMSG_ON
;
5950 * ata_port_start - Set port up for dma.
5951 * @ap: Port to initialize
5953 * Called just after data structures for each port are
5954 * initialized. Allocates space for PRD table.
5956 * May be used as the port_start() entry in ata_port_operations.
5959 * Inherited from caller.
5961 int ata_port_start(struct ata_port
*ap
)
5963 struct device
*dev
= ap
->dev
;
5966 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5971 rc
= ata_pad_alloc(ap
, dev
);
5975 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5976 (unsigned long long)ap
->prd_dma
);
5981 * ata_dev_init - Initialize an ata_device structure
5982 * @dev: Device structure to initialize
5984 * Initialize @dev in preparation for probing.
5987 * Inherited from caller.
5989 void ata_dev_init(struct ata_device
*dev
)
5991 struct ata_port
*ap
= dev
->ap
;
5992 unsigned long flags
;
5994 /* SATA spd limit is bound to the first device */
5995 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5997 /* High bits of dev->flags are used to record warm plug
5998 * requests which occur asynchronously. Synchronize using
6001 spin_lock_irqsave(ap
->lock
, flags
);
6002 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6003 spin_unlock_irqrestore(ap
->lock
, flags
);
6005 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6006 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6007 dev
->pio_mask
= UINT_MAX
;
6008 dev
->mwdma_mask
= UINT_MAX
;
6009 dev
->udma_mask
= UINT_MAX
;
6013 * ata_port_alloc - allocate and initialize basic ATA port resources
6014 * @host: ATA host this allocated port belongs to
6016 * Allocate and initialize basic ATA port resources.
6019 * Allocate ATA port on success, NULL on failure.
6022 * Inherited from calling layer (may sleep).
6024 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6026 struct ata_port
*ap
;
6031 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6035 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6036 ap
->lock
= &host
->lock
;
6037 ap
->flags
= ATA_FLAG_DISABLED
;
6039 ap
->ctl
= ATA_DEVCTL_OBS
;
6041 ap
->dev
= host
->dev
;
6043 ap
->hw_sata_spd_limit
= UINT_MAX
;
6044 ap
->active_tag
= ATA_TAG_POISON
;
6045 ap
->last_ctl
= 0xFF;
6047 #if defined(ATA_VERBOSE_DEBUG)
6048 /* turn on all debugging levels */
6049 ap
->msg_enable
= 0x00FF;
6050 #elif defined(ATA_DEBUG)
6051 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6053 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6056 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6057 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6058 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6059 INIT_LIST_HEAD(&ap
->eh_done_q
);
6060 init_waitqueue_head(&ap
->eh_wait_q
);
6062 ap
->cbl
= ATA_CBL_NONE
;
6064 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6065 struct ata_device
*dev
= &ap
->device
[i
];
6072 ap
->stats
.unhandled_irq
= 1;
6073 ap
->stats
.idle_irq
= 1;
6078 static void ata_host_release(struct device
*gendev
, void *res
)
6080 struct ata_host
*host
= dev_get_drvdata(gendev
);
6083 for (i
= 0; i
< host
->n_ports
; i
++) {
6084 struct ata_port
*ap
= host
->ports
[i
];
6089 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6090 ap
->ops
->port_stop(ap
);
6093 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6094 host
->ops
->host_stop(host
);
6096 for (i
= 0; i
< host
->n_ports
; i
++) {
6097 struct ata_port
*ap
= host
->ports
[i
];
6103 scsi_host_put(ap
->scsi_host
);
6106 host
->ports
[i
] = NULL
;
6109 dev_set_drvdata(gendev
, NULL
);
6113 * ata_host_alloc - allocate and init basic ATA host resources
6114 * @dev: generic device this host is associated with
6115 * @max_ports: maximum number of ATA ports associated with this host
6117 * Allocate and initialize basic ATA host resources. LLD calls
6118 * this function to allocate a host, initializes it fully and
6119 * attaches it using ata_host_register().
6121 * @max_ports ports are allocated and host->n_ports is
6122 * initialized to @max_ports. The caller is allowed to decrease
6123 * host->n_ports before calling ata_host_register(). The unused
6124 * ports will be automatically freed on registration.
6127 * Allocate ATA host on success, NULL on failure.
6130 * Inherited from calling layer (may sleep).
6132 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6134 struct ata_host
*host
;
6140 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6143 /* alloc a container for our list of ATA ports (buses) */
6144 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6145 /* alloc a container for our list of ATA ports (buses) */
6146 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6150 devres_add(dev
, host
);
6151 dev_set_drvdata(dev
, host
);
6153 spin_lock_init(&host
->lock
);
6155 host
->n_ports
= max_ports
;
6157 /* allocate ports bound to this host */
6158 for (i
= 0; i
< max_ports
; i
++) {
6159 struct ata_port
*ap
;
6161 ap
= ata_port_alloc(host
);
6166 host
->ports
[i
] = ap
;
6169 devres_remove_group(dev
, NULL
);
6173 devres_release_group(dev
, NULL
);
6178 * ata_host_alloc_pinfo - alloc host and init with port_info array
6179 * @dev: generic device this host is associated with
6180 * @ppi: array of ATA port_info to initialize host with
6181 * @n_ports: number of ATA ports attached to this host
6183 * Allocate ATA host and initialize with info from @ppi. If NULL
6184 * terminated, @ppi may contain fewer entries than @n_ports. The
6185 * last entry will be used for the remaining ports.
6188 * Allocate ATA host on success, NULL on failure.
6191 * Inherited from calling layer (may sleep).
6193 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6194 const struct ata_port_info
* const * ppi
,
6197 const struct ata_port_info
*pi
;
6198 struct ata_host
*host
;
6201 host
= ata_host_alloc(dev
, n_ports
);
6205 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6206 struct ata_port
*ap
= host
->ports
[i
];
6211 ap
->pio_mask
= pi
->pio_mask
;
6212 ap
->mwdma_mask
= pi
->mwdma_mask
;
6213 ap
->udma_mask
= pi
->udma_mask
;
6214 ap
->flags
|= pi
->flags
;
6215 ap
->ops
= pi
->port_ops
;
6217 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6218 host
->ops
= pi
->port_ops
;
6219 if (!host
->private_data
&& pi
->private_data
)
6220 host
->private_data
= pi
->private_data
;
6227 * ata_host_start - start and freeze ports of an ATA host
6228 * @host: ATA host to start ports for
6230 * Start and then freeze ports of @host. Started status is
6231 * recorded in host->flags, so this function can be called
6232 * multiple times. Ports are guaranteed to get started only
6233 * once. If host->ops isn't initialized yet, its set to the
6234 * first non-dummy port ops.
6237 * Inherited from calling layer (may sleep).
6240 * 0 if all ports are started successfully, -errno otherwise.
6242 int ata_host_start(struct ata_host
*host
)
6246 if (host
->flags
& ATA_HOST_STARTED
)
6249 for (i
= 0; i
< host
->n_ports
; i
++) {
6250 struct ata_port
*ap
= host
->ports
[i
];
6252 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6253 host
->ops
= ap
->ops
;
6255 if (ap
->ops
->port_start
) {
6256 rc
= ap
->ops
->port_start(ap
);
6258 ata_port_printk(ap
, KERN_ERR
, "failed to "
6259 "start port (errno=%d)\n", rc
);
6264 ata_eh_freeze_port(ap
);
6267 host
->flags
|= ATA_HOST_STARTED
;
6272 struct ata_port
*ap
= host
->ports
[i
];
6274 if (ap
->ops
->port_stop
)
6275 ap
->ops
->port_stop(ap
);
6281 * ata_sas_host_init - Initialize a host struct
6282 * @host: host to initialize
6283 * @dev: device host is attached to
6284 * @flags: host flags
6288 * PCI/etc. bus probe sem.
6291 /* KILLME - the only user left is ipr */
6292 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6293 unsigned long flags
, const struct ata_port_operations
*ops
)
6295 spin_lock_init(&host
->lock
);
6297 host
->flags
= flags
;
6302 * ata_host_register - register initialized ATA host
6303 * @host: ATA host to register
6304 * @sht: template for SCSI host
6306 * Register initialized ATA host. @host is allocated using
6307 * ata_host_alloc() and fully initialized by LLD. This function
6308 * starts ports, registers @host with ATA and SCSI layers and
6309 * probe registered devices.
6312 * Inherited from calling layer (may sleep).
6315 * 0 on success, -errno otherwise.
6317 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6321 /* host must have been started */
6322 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6323 dev_printk(KERN_ERR
, host
->dev
,
6324 "BUG: trying to register unstarted host\n");
6329 /* Blow away unused ports. This happens when LLD can't
6330 * determine the exact number of ports to allocate at
6333 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6334 kfree(host
->ports
[i
]);
6336 /* give ports names and add SCSI hosts */
6337 for (i
= 0; i
< host
->n_ports
; i
++)
6338 host
->ports
[i
]->print_id
= ata_print_id
++;
6340 rc
= ata_scsi_add_hosts(host
, sht
);
6344 /* associate with ACPI nodes */
6345 ata_acpi_associate(host
);
6347 /* set cable, sata_spd_limit and report */
6348 for (i
= 0; i
< host
->n_ports
; i
++) {
6349 struct ata_port
*ap
= host
->ports
[i
];
6352 unsigned long xfer_mask
;
6354 /* set SATA cable type if still unset */
6355 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6356 ap
->cbl
= ATA_CBL_SATA
;
6358 /* init sata_spd_limit to the current value */
6359 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
6360 int spd
= (scontrol
>> 4) & 0xf;
6362 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6364 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
6366 /* report the secondary IRQ for second channel legacy */
6367 irq_line
= host
->irq
;
6368 if (i
== 1 && host
->irq2
)
6369 irq_line
= host
->irq2
;
6371 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6374 /* print per-port info to dmesg */
6375 if (!ata_port_is_dummy(ap
))
6376 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
6377 "ctl 0x%p bmdma 0x%p irq %d\n",
6378 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6379 ata_mode_string(xfer_mask
),
6380 ap
->ioaddr
.cmd_addr
,
6381 ap
->ioaddr
.ctl_addr
,
6382 ap
->ioaddr
.bmdma_addr
,
6385 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6388 /* perform each probe synchronously */
6389 DPRINTK("probe begin\n");
6390 for (i
= 0; i
< host
->n_ports
; i
++) {
6391 struct ata_port
*ap
= host
->ports
[i
];
6395 if (ap
->ops
->error_handler
) {
6396 struct ata_eh_info
*ehi
= &ap
->eh_info
;
6397 unsigned long flags
;
6401 /* kick EH for boot probing */
6402 spin_lock_irqsave(ap
->lock
, flags
);
6404 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
6405 ehi
->action
|= ATA_EH_SOFTRESET
;
6406 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6408 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6409 ap
->pflags
|= ATA_PFLAG_LOADING
;
6410 ata_port_schedule_eh(ap
);
6412 spin_unlock_irqrestore(ap
->lock
, flags
);
6414 /* wait for EH to finish */
6415 ata_port_wait_eh(ap
);
6417 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6418 rc
= ata_bus_probe(ap
);
6419 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6422 /* FIXME: do something useful here?
6423 * Current libata behavior will
6424 * tear down everything when
6425 * the module is removed
6426 * or the h/w is unplugged.
6432 /* probes are done, now scan each port's disk(s) */
6433 DPRINTK("host probe begin\n");
6434 for (i
= 0; i
< host
->n_ports
; i
++) {
6435 struct ata_port
*ap
= host
->ports
[i
];
6437 ata_scsi_scan_host(ap
);
6444 * ata_host_activate - start host, request IRQ and register it
6445 * @host: target ATA host
6446 * @irq: IRQ to request
6447 * @irq_handler: irq_handler used when requesting IRQ
6448 * @irq_flags: irq_flags used when requesting IRQ
6449 * @sht: scsi_host_template to use when registering the host
6451 * After allocating an ATA host and initializing it, most libata
6452 * LLDs perform three steps to activate the host - start host,
6453 * request IRQ and register it. This helper takes necessasry
6454 * arguments and performs the three steps in one go.
6457 * Inherited from calling layer (may sleep).
6460 * 0 on success, -errno otherwise.
6462 int ata_host_activate(struct ata_host
*host
, int irq
,
6463 irq_handler_t irq_handler
, unsigned long irq_flags
,
6464 struct scsi_host_template
*sht
)
6468 rc
= ata_host_start(host
);
6472 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6473 dev_driver_string(host
->dev
), host
);
6477 /* Used to print device info at probe */
6480 rc
= ata_host_register(host
, sht
);
6481 /* if failed, just free the IRQ and leave ports alone */
6483 devm_free_irq(host
->dev
, irq
, host
);
6489 * ata_port_detach - Detach ATA port in prepration of device removal
6490 * @ap: ATA port to be detached
6492 * Detach all ATA devices and the associated SCSI devices of @ap;
6493 * then, remove the associated SCSI host. @ap is guaranteed to
6494 * be quiescent on return from this function.
6497 * Kernel thread context (may sleep).
6499 void ata_port_detach(struct ata_port
*ap
)
6501 unsigned long flags
;
6504 if (!ap
->ops
->error_handler
)
6507 /* tell EH we're leaving & flush EH */
6508 spin_lock_irqsave(ap
->lock
, flags
);
6509 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6510 spin_unlock_irqrestore(ap
->lock
, flags
);
6512 ata_port_wait_eh(ap
);
6514 /* EH is now guaranteed to see UNLOADING, so no new device
6515 * will be attached. Disable all existing devices.
6517 spin_lock_irqsave(ap
->lock
, flags
);
6519 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
6520 ata_dev_disable(&ap
->device
[i
]);
6522 spin_unlock_irqrestore(ap
->lock
, flags
);
6524 /* Final freeze & EH. All in-flight commands are aborted. EH
6525 * will be skipped and retrials will be terminated with bad
6528 spin_lock_irqsave(ap
->lock
, flags
);
6529 ata_port_freeze(ap
); /* won't be thawed */
6530 spin_unlock_irqrestore(ap
->lock
, flags
);
6532 ata_port_wait_eh(ap
);
6533 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6536 /* remove the associated SCSI host */
6537 scsi_remove_host(ap
->scsi_host
);
6541 * ata_host_detach - Detach all ports of an ATA host
6542 * @host: Host to detach
6544 * Detach all ports of @host.
6547 * Kernel thread context (may sleep).
6549 void ata_host_detach(struct ata_host
*host
)
6553 for (i
= 0; i
< host
->n_ports
; i
++)
6554 ata_port_detach(host
->ports
[i
]);
6558 * ata_std_ports - initialize ioaddr with standard port offsets.
6559 * @ioaddr: IO address structure to be initialized
6561 * Utility function which initializes data_addr, error_addr,
6562 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6563 * device_addr, status_addr, and command_addr to standard offsets
6564 * relative to cmd_addr.
6566 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6569 void ata_std_ports(struct ata_ioports
*ioaddr
)
6571 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6572 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6573 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6574 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6575 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6576 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6577 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6578 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6579 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6580 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6587 * ata_pci_remove_one - PCI layer callback for device removal
6588 * @pdev: PCI device that was removed
6590 * PCI layer indicates to libata via this hook that hot-unplug or
6591 * module unload event has occurred. Detach all ports. Resource
6592 * release is handled via devres.
6595 * Inherited from PCI layer (may sleep).
6597 void ata_pci_remove_one(struct pci_dev
*pdev
)
6599 struct device
*dev
= pci_dev_to_dev(pdev
);
6600 struct ata_host
*host
= dev_get_drvdata(dev
);
6602 ata_host_detach(host
);
6605 /* move to PCI subsystem */
6606 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6608 unsigned long tmp
= 0;
6610 switch (bits
->width
) {
6613 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6619 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6625 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6636 return (tmp
== bits
->val
) ? 1 : 0;
6640 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6642 pci_save_state(pdev
);
6643 pci_disable_device(pdev
);
6645 if (mesg
.event
== PM_EVENT_SUSPEND
)
6646 pci_set_power_state(pdev
, PCI_D3hot
);
6649 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6653 pci_set_power_state(pdev
, PCI_D0
);
6654 pci_restore_state(pdev
);
6656 rc
= pcim_enable_device(pdev
);
6658 dev_printk(KERN_ERR
, &pdev
->dev
,
6659 "failed to enable device after resume (%d)\n", rc
);
6663 pci_set_master(pdev
);
6667 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6669 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6672 rc
= ata_host_suspend(host
, mesg
);
6676 ata_pci_device_do_suspend(pdev
, mesg
);
6681 int ata_pci_device_resume(struct pci_dev
*pdev
)
6683 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6686 rc
= ata_pci_device_do_resume(pdev
);
6688 ata_host_resume(host
);
6691 #endif /* CONFIG_PM */
6693 #endif /* CONFIG_PCI */
6696 static int __init
ata_init(void)
6698 ata_probe_timeout
*= HZ
;
6699 ata_wq
= create_workqueue("ata");
6703 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6705 destroy_workqueue(ata_wq
);
6709 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6713 static void __exit
ata_exit(void)
6715 destroy_workqueue(ata_wq
);
6716 destroy_workqueue(ata_aux_wq
);
6719 subsys_initcall(ata_init
);
6720 module_exit(ata_exit
);
6722 static unsigned long ratelimit_time
;
6723 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6725 int ata_ratelimit(void)
6728 unsigned long flags
;
6730 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6732 if (time_after(jiffies
, ratelimit_time
)) {
6734 ratelimit_time
= jiffies
+ (HZ
/5);
6738 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6744 * ata_wait_register - wait until register value changes
6745 * @reg: IO-mapped register
6746 * @mask: Mask to apply to read register value
6747 * @val: Wait condition
6748 * @interval_msec: polling interval in milliseconds
6749 * @timeout_msec: timeout in milliseconds
6751 * Waiting for some bits of register to change is a common
6752 * operation for ATA controllers. This function reads 32bit LE
6753 * IO-mapped register @reg and tests for the following condition.
6755 * (*@reg & mask) != val
6757 * If the condition is met, it returns; otherwise, the process is
6758 * repeated after @interval_msec until timeout.
6761 * Kernel thread context (may sleep)
6764 * The final register value.
6766 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6767 unsigned long interval_msec
,
6768 unsigned long timeout_msec
)
6770 unsigned long timeout
;
6773 tmp
= ioread32(reg
);
6775 /* Calculate timeout _after_ the first read to make sure
6776 * preceding writes reach the controller before starting to
6777 * eat away the timeout.
6779 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6781 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6782 msleep(interval_msec
);
6783 tmp
= ioread32(reg
);
6792 static void ata_dummy_noret(struct ata_port
*ap
) { }
6793 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6794 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6796 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6801 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6803 return AC_ERR_SYSTEM
;
6806 const struct ata_port_operations ata_dummy_port_ops
= {
6807 .port_disable
= ata_port_disable
,
6808 .check_status
= ata_dummy_check_status
,
6809 .check_altstatus
= ata_dummy_check_status
,
6810 .dev_select
= ata_noop_dev_select
,
6811 .qc_prep
= ata_noop_qc_prep
,
6812 .qc_issue
= ata_dummy_qc_issue
,
6813 .freeze
= ata_dummy_noret
,
6814 .thaw
= ata_dummy_noret
,
6815 .error_handler
= ata_dummy_noret
,
6816 .post_internal_cmd
= ata_dummy_qc_noret
,
6817 .irq_clear
= ata_dummy_noret
,
6818 .port_start
= ata_dummy_ret0
,
6819 .port_stop
= ata_dummy_noret
,
6822 const struct ata_port_info ata_dummy_port_info
= {
6823 .port_ops
= &ata_dummy_port_ops
,
6827 * libata is essentially a library of internal helper functions for
6828 * low-level ATA host controller drivers. As such, the API/ABI is
6829 * likely to change as new drivers are added and updated.
6830 * Do not depend on ABI/API stability.
6833 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6834 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6835 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6836 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6837 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6838 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6839 EXPORT_SYMBOL_GPL(ata_std_ports
);
6840 EXPORT_SYMBOL_GPL(ata_host_init
);
6841 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6842 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6843 EXPORT_SYMBOL_GPL(ata_host_start
);
6844 EXPORT_SYMBOL_GPL(ata_host_register
);
6845 EXPORT_SYMBOL_GPL(ata_host_activate
);
6846 EXPORT_SYMBOL_GPL(ata_host_detach
);
6847 EXPORT_SYMBOL_GPL(ata_sg_init
);
6848 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6849 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6850 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6851 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6852 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6853 EXPORT_SYMBOL_GPL(ata_tf_load
);
6854 EXPORT_SYMBOL_GPL(ata_tf_read
);
6855 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6856 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6857 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6858 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6859 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6860 EXPORT_SYMBOL_GPL(ata_check_status
);
6861 EXPORT_SYMBOL_GPL(ata_altstatus
);
6862 EXPORT_SYMBOL_GPL(ata_exec_command
);
6863 EXPORT_SYMBOL_GPL(ata_port_start
);
6864 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
6865 EXPORT_SYMBOL_GPL(ata_interrupt
);
6866 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6867 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6868 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6869 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6870 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
6871 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6872 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6873 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6874 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6875 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6876 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6877 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6878 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6879 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6880 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6881 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6882 EXPORT_SYMBOL_GPL(ata_port_probe
);
6883 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6884 EXPORT_SYMBOL_GPL(sata_set_spd
);
6885 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6886 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6887 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6888 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6889 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6890 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6891 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6892 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6893 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6894 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6895 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6896 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6897 EXPORT_SYMBOL_GPL(ata_port_disable
);
6898 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6899 EXPORT_SYMBOL_GPL(ata_wait_register
);
6900 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6901 EXPORT_SYMBOL_GPL(ata_wait_ready
);
6902 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6903 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6904 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6905 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6906 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6907 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6908 EXPORT_SYMBOL_GPL(ata_host_intr
);
6909 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6910 EXPORT_SYMBOL_GPL(sata_scr_read
);
6911 EXPORT_SYMBOL_GPL(sata_scr_write
);
6912 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6913 EXPORT_SYMBOL_GPL(ata_port_online
);
6914 EXPORT_SYMBOL_GPL(ata_port_offline
);
6916 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6917 EXPORT_SYMBOL_GPL(ata_host_resume
);
6918 #endif /* CONFIG_PM */
6919 EXPORT_SYMBOL_GPL(ata_id_string
);
6920 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6921 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
6922 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6924 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6925 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6926 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6929 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6930 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
6931 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
6932 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
6933 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6934 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6936 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6937 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6938 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6939 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6940 #endif /* CONFIG_PM */
6941 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6942 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6943 #endif /* CONFIG_PCI */
6945 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6946 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6947 EXPORT_SYMBOL_GPL(ata_port_abort
);
6948 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6949 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6950 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6951 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6952 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6953 EXPORT_SYMBOL_GPL(ata_do_eh
);
6954 EXPORT_SYMBOL_GPL(ata_irq_on
);
6955 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6956 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6957 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6958 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
6960 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6961 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6962 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6963 EXPORT_SYMBOL_GPL(ata_cable_sata
);