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 unsigned int ata_dev_set_AN(struct ata_device
*dev
, u8 enable
);
74 static void ata_dev_xfermask(struct ata_device
*dev
);
75 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
77 unsigned int ata_print_id
= 1;
78 static struct workqueue_struct
*ata_wq
;
80 struct workqueue_struct
*ata_aux_wq
;
82 int atapi_enabled
= 1;
83 module_param(atapi_enabled
, int, 0444);
84 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
87 module_param(atapi_dmadir
, int, 0444);
88 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
90 int atapi_passthru16
= 1;
91 module_param(atapi_passthru16
, int, 0444);
92 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
95 module_param_named(fua
, libata_fua
, int, 0444);
96 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
98 static int ata_ignore_hpa
= 0;
99 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
100 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
102 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
103 module_param(ata_probe_timeout
, int, 0444);
104 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
106 int libata_noacpi
= 1;
107 module_param_named(noacpi
, libata_noacpi
, int, 0444);
108 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
110 MODULE_AUTHOR("Jeff Garzik");
111 MODULE_DESCRIPTION("Library module for ATA devices");
112 MODULE_LICENSE("GPL");
113 MODULE_VERSION(DRV_VERSION
);
117 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
118 * @tf: Taskfile to convert
119 * @pmp: Port multiplier port
120 * @is_cmd: This FIS is for command
121 * @fis: Buffer into which data will output
123 * Converts a standard ATA taskfile to a Serial ATA
124 * FIS structure (Register - Host to Device).
127 * Inherited from caller.
129 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
131 fis
[0] = 0x27; /* Register - Host to Device FIS */
132 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
134 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
136 fis
[2] = tf
->command
;
137 fis
[3] = tf
->feature
;
144 fis
[8] = tf
->hob_lbal
;
145 fis
[9] = tf
->hob_lbam
;
146 fis
[10] = tf
->hob_lbah
;
147 fis
[11] = tf
->hob_feature
;
150 fis
[13] = tf
->hob_nsect
;
161 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
162 * @fis: Buffer from which data will be input
163 * @tf: Taskfile to output
165 * Converts a serial ATA FIS structure to a standard ATA taskfile.
168 * Inherited from caller.
171 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
173 tf
->command
= fis
[2]; /* status */
174 tf
->feature
= fis
[3]; /* error */
181 tf
->hob_lbal
= fis
[8];
182 tf
->hob_lbam
= fis
[9];
183 tf
->hob_lbah
= fis
[10];
186 tf
->hob_nsect
= fis
[13];
189 static const u8 ata_rw_cmds
[] = {
193 ATA_CMD_READ_MULTI_EXT
,
194 ATA_CMD_WRITE_MULTI_EXT
,
198 ATA_CMD_WRITE_MULTI_FUA_EXT
,
202 ATA_CMD_PIO_READ_EXT
,
203 ATA_CMD_PIO_WRITE_EXT
,
216 ATA_CMD_WRITE_FUA_EXT
220 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
221 * @tf: command to examine and configure
222 * @dev: device tf belongs to
224 * Examine the device configuration and tf->flags to calculate
225 * the proper read/write commands and protocol to use.
230 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
234 int index
, fua
, lba48
, write
;
236 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
237 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
238 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
240 if (dev
->flags
& ATA_DFLAG_PIO
) {
241 tf
->protocol
= ATA_PROT_PIO
;
242 index
= dev
->multi_count
? 0 : 8;
243 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
244 /* Unable to use DMA due to host limitation */
245 tf
->protocol
= ATA_PROT_PIO
;
246 index
= dev
->multi_count
? 0 : 8;
248 tf
->protocol
= ATA_PROT_DMA
;
252 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
261 * ata_tf_read_block - Read block address from ATA taskfile
262 * @tf: ATA taskfile of interest
263 * @dev: ATA device @tf belongs to
268 * Read block address from @tf. This function can handle all
269 * three address formats - LBA, LBA48 and CHS. tf->protocol and
270 * flags select the address format to use.
273 * Block address read from @tf.
275 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
279 if (tf
->flags
& ATA_TFLAG_LBA
) {
280 if (tf
->flags
& ATA_TFLAG_LBA48
) {
281 block
|= (u64
)tf
->hob_lbah
<< 40;
282 block
|= (u64
)tf
->hob_lbam
<< 32;
283 block
|= tf
->hob_lbal
<< 24;
285 block
|= (tf
->device
& 0xf) << 24;
287 block
|= tf
->lbah
<< 16;
288 block
|= tf
->lbam
<< 8;
293 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
294 head
= tf
->device
& 0xf;
297 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
304 * ata_build_rw_tf - Build ATA taskfile for given read/write request
305 * @tf: Target ATA taskfile
306 * @dev: ATA device @tf belongs to
307 * @block: Block address
308 * @n_block: Number of blocks
309 * @tf_flags: RW/FUA etc...
315 * Build ATA taskfile @tf for read/write request described by
316 * @block, @n_block, @tf_flags and @tag on @dev.
320 * 0 on success, -ERANGE if the request is too large for @dev,
321 * -EINVAL if the request is invalid.
323 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
324 u64 block
, u32 n_block
, unsigned int tf_flags
,
327 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
328 tf
->flags
|= tf_flags
;
330 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
332 if (!lba_48_ok(block
, n_block
))
335 tf
->protocol
= ATA_PROT_NCQ
;
336 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
338 if (tf
->flags
& ATA_TFLAG_WRITE
)
339 tf
->command
= ATA_CMD_FPDMA_WRITE
;
341 tf
->command
= ATA_CMD_FPDMA_READ
;
343 tf
->nsect
= tag
<< 3;
344 tf
->hob_feature
= (n_block
>> 8) & 0xff;
345 tf
->feature
= n_block
& 0xff;
347 tf
->hob_lbah
= (block
>> 40) & 0xff;
348 tf
->hob_lbam
= (block
>> 32) & 0xff;
349 tf
->hob_lbal
= (block
>> 24) & 0xff;
350 tf
->lbah
= (block
>> 16) & 0xff;
351 tf
->lbam
= (block
>> 8) & 0xff;
352 tf
->lbal
= block
& 0xff;
355 if (tf
->flags
& ATA_TFLAG_FUA
)
356 tf
->device
|= 1 << 7;
357 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
358 tf
->flags
|= ATA_TFLAG_LBA
;
360 if (lba_28_ok(block
, n_block
)) {
362 tf
->device
|= (block
>> 24) & 0xf;
363 } else if (lba_48_ok(block
, n_block
)) {
364 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
368 tf
->flags
|= ATA_TFLAG_LBA48
;
370 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
372 tf
->hob_lbah
= (block
>> 40) & 0xff;
373 tf
->hob_lbam
= (block
>> 32) & 0xff;
374 tf
->hob_lbal
= (block
>> 24) & 0xff;
376 /* request too large even for LBA48 */
379 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
382 tf
->nsect
= n_block
& 0xff;
384 tf
->lbah
= (block
>> 16) & 0xff;
385 tf
->lbam
= (block
>> 8) & 0xff;
386 tf
->lbal
= block
& 0xff;
388 tf
->device
|= ATA_LBA
;
391 u32 sect
, head
, cyl
, track
;
393 /* The request -may- be too large for CHS addressing. */
394 if (!lba_28_ok(block
, n_block
))
397 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
400 /* Convert LBA to CHS */
401 track
= (u32
)block
/ dev
->sectors
;
402 cyl
= track
/ dev
->heads
;
403 head
= track
% dev
->heads
;
404 sect
= (u32
)block
% dev
->sectors
+ 1;
406 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
407 (u32
)block
, track
, cyl
, head
, sect
);
409 /* Check whether the converted CHS can fit.
413 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
416 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
427 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
428 * @pio_mask: pio_mask
429 * @mwdma_mask: mwdma_mask
430 * @udma_mask: udma_mask
432 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
433 * unsigned int xfer_mask.
441 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
442 unsigned int mwdma_mask
,
443 unsigned int udma_mask
)
445 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
446 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
447 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
451 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
452 * @xfer_mask: xfer_mask to unpack
453 * @pio_mask: resulting pio_mask
454 * @mwdma_mask: resulting mwdma_mask
455 * @udma_mask: resulting udma_mask
457 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
458 * Any NULL distination masks will be ignored.
460 static void ata_unpack_xfermask(unsigned int xfer_mask
,
461 unsigned int *pio_mask
,
462 unsigned int *mwdma_mask
,
463 unsigned int *udma_mask
)
466 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
468 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
470 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
473 static const struct ata_xfer_ent
{
477 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
478 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
479 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
484 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
485 * @xfer_mask: xfer_mask of interest
487 * Return matching XFER_* value for @xfer_mask. Only the highest
488 * bit of @xfer_mask is considered.
494 * Matching XFER_* value, 0 if no match found.
496 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
498 int highbit
= fls(xfer_mask
) - 1;
499 const struct ata_xfer_ent
*ent
;
501 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
502 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
503 return ent
->base
+ highbit
- ent
->shift
;
508 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
509 * @xfer_mode: XFER_* of interest
511 * Return matching xfer_mask for @xfer_mode.
517 * Matching xfer_mask, 0 if no match found.
519 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
521 const struct ata_xfer_ent
*ent
;
523 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
524 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
525 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
530 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
531 * @xfer_mode: XFER_* of interest
533 * Return matching xfer_shift for @xfer_mode.
539 * Matching xfer_shift, -1 if no match found.
541 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
543 const struct ata_xfer_ent
*ent
;
545 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
546 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
552 * ata_mode_string - convert xfer_mask to string
553 * @xfer_mask: mask of bits supported; only highest bit counts.
555 * Determine string which represents the highest speed
556 * (highest bit in @modemask).
562 * Constant C string representing highest speed listed in
563 * @mode_mask, or the constant C string "<n/a>".
565 static const char *ata_mode_string(unsigned int xfer_mask
)
567 static const char * const xfer_mode_str
[] = {
591 highbit
= fls(xfer_mask
) - 1;
592 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
593 return xfer_mode_str
[highbit
];
597 static const char *sata_spd_string(unsigned int spd
)
599 static const char * const spd_str
[] = {
604 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
606 return spd_str
[spd
- 1];
609 void ata_dev_disable(struct ata_device
*dev
)
611 if (ata_dev_enabled(dev
)) {
612 if (ata_msg_drv(dev
->link
->ap
))
613 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
614 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
621 * ata_devchk - PATA device presence detection
622 * @ap: ATA channel to examine
623 * @device: Device to examine (starting at zero)
625 * This technique was originally described in
626 * Hale Landis's ATADRVR (www.ata-atapi.com), and
627 * later found its way into the ATA/ATAPI spec.
629 * Write a pattern to the ATA shadow registers,
630 * and if a device is present, it will respond by
631 * correctly storing and echoing back the
632 * ATA shadow register contents.
638 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
640 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
643 ap
->ops
->dev_select(ap
, device
);
645 iowrite8(0x55, ioaddr
->nsect_addr
);
646 iowrite8(0xaa, ioaddr
->lbal_addr
);
648 iowrite8(0xaa, ioaddr
->nsect_addr
);
649 iowrite8(0x55, ioaddr
->lbal_addr
);
651 iowrite8(0x55, ioaddr
->nsect_addr
);
652 iowrite8(0xaa, ioaddr
->lbal_addr
);
654 nsect
= ioread8(ioaddr
->nsect_addr
);
655 lbal
= ioread8(ioaddr
->lbal_addr
);
657 if ((nsect
== 0x55) && (lbal
== 0xaa))
658 return 1; /* we found a device */
660 return 0; /* nothing found */
664 * ata_dev_classify - determine device type based on ATA-spec signature
665 * @tf: ATA taskfile register set for device to be identified
667 * Determine from taskfile register contents whether a device is
668 * ATA or ATAPI, as per "Signature and persistence" section
669 * of ATA/PI spec (volume 1, sect 5.14).
675 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
676 * the event of failure.
679 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
681 /* Apple's open source Darwin code hints that some devices only
682 * put a proper signature into the LBA mid/high registers,
683 * So, we only check those. It's sufficient for uniqueness.
686 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
687 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
688 DPRINTK("found ATA device by sig\n");
692 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
693 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
694 DPRINTK("found ATAPI device by sig\n");
695 return ATA_DEV_ATAPI
;
698 DPRINTK("unknown device\n");
699 return ATA_DEV_UNKNOWN
;
703 * ata_dev_try_classify - Parse returned ATA device signature
704 * @ap: ATA channel to examine
705 * @device: Device to examine (starting at zero)
706 * @r_err: Value of error register on completion
708 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
709 * an ATA/ATAPI-defined set of values is placed in the ATA
710 * shadow registers, indicating the results of device detection
713 * Select the ATA device, and read the values from the ATA shadow
714 * registers. Then parse according to the Error register value,
715 * and the spec-defined values examined by ata_dev_classify().
721 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
725 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
727 struct ata_taskfile tf
;
731 ap
->ops
->dev_select(ap
, device
);
733 memset(&tf
, 0, sizeof(tf
));
735 ap
->ops
->tf_read(ap
, &tf
);
740 /* see if device passed diags: if master then continue and warn later */
741 if (err
== 0 && device
== 0)
742 /* diagnostic fail : do nothing _YET_ */
743 ap
->link
.device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
746 else if ((device
== 0) && (err
== 0x81))
751 /* determine if device is ATA or ATAPI */
752 class = ata_dev_classify(&tf
);
754 if (class == ATA_DEV_UNKNOWN
)
756 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
762 * ata_id_string - Convert IDENTIFY DEVICE page into string
763 * @id: IDENTIFY DEVICE results we will examine
764 * @s: string into which data is output
765 * @ofs: offset into identify device page
766 * @len: length of string to return. must be an even number.
768 * The strings in the IDENTIFY DEVICE page are broken up into
769 * 16-bit chunks. Run through the string, and output each
770 * 8-bit chunk linearly, regardless of platform.
776 void ata_id_string(const u16
*id
, unsigned char *s
,
777 unsigned int ofs
, unsigned int len
)
796 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
797 * @id: IDENTIFY DEVICE results we will examine
798 * @s: string into which data is output
799 * @ofs: offset into identify device page
800 * @len: length of string to return. must be an odd number.
802 * This function is identical to ata_id_string except that it
803 * trims trailing spaces and terminates the resulting string with
804 * null. @len must be actual maximum length (even number) + 1.
809 void ata_id_c_string(const u16
*id
, unsigned char *s
,
810 unsigned int ofs
, unsigned int len
)
816 ata_id_string(id
, s
, ofs
, len
- 1);
818 p
= s
+ strnlen(s
, len
- 1);
819 while (p
> s
&& p
[-1] == ' ')
824 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
828 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
829 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
830 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
831 sectors
|= (tf
->lbah
& 0xff) << 16;
832 sectors
|= (tf
->lbam
& 0xff) << 8;
833 sectors
|= (tf
->lbal
& 0xff);
838 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
842 sectors
|= (tf
->device
& 0x0f) << 24;
843 sectors
|= (tf
->lbah
& 0xff) << 16;
844 sectors
|= (tf
->lbam
& 0xff) << 8;
845 sectors
|= (tf
->lbal
& 0xff);
851 * ata_read_native_max_address_ext - LBA48 native max query
852 * @dev: Device to query
854 * Perform an LBA48 size query upon the device in question. Return the
855 * actual LBA48 size or zero if the command fails.
858 static u64
ata_read_native_max_address_ext(struct ata_device
*dev
)
861 struct ata_taskfile tf
;
863 ata_tf_init(dev
, &tf
);
865 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
866 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
867 tf
.protocol
|= ATA_PROT_NODATA
;
870 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
874 return ata_tf_to_lba48(&tf
);
878 * ata_read_native_max_address - LBA28 native max query
879 * @dev: Device to query
881 * Performa an LBA28 size query upon the device in question. Return the
882 * actual LBA28 size or zero if the command fails.
885 static u64
ata_read_native_max_address(struct ata_device
*dev
)
888 struct ata_taskfile tf
;
890 ata_tf_init(dev
, &tf
);
892 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
893 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
894 tf
.protocol
|= ATA_PROT_NODATA
;
897 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
901 return ata_tf_to_lba(&tf
);
905 * ata_set_native_max_address_ext - LBA48 native max set
906 * @dev: Device to query
907 * @new_sectors: new max sectors value to set for the device
909 * Perform an LBA48 size set max upon the device in question. Return the
910 * actual LBA48 size or zero if the command fails.
913 static u64
ata_set_native_max_address_ext(struct ata_device
*dev
, u64 new_sectors
)
916 struct ata_taskfile tf
;
920 ata_tf_init(dev
, &tf
);
922 tf
.command
= ATA_CMD_SET_MAX_EXT
;
923 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
924 tf
.protocol
|= ATA_PROT_NODATA
;
927 tf
.lbal
= (new_sectors
>> 0) & 0xff;
928 tf
.lbam
= (new_sectors
>> 8) & 0xff;
929 tf
.lbah
= (new_sectors
>> 16) & 0xff;
931 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
932 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
933 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
935 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
939 return ata_tf_to_lba48(&tf
);
943 * ata_set_native_max_address - LBA28 native max set
944 * @dev: Device to query
945 * @new_sectors: new max sectors value to set for the device
947 * Perform an LBA28 size set max upon the device in question. Return the
948 * actual LBA28 size or zero if the command fails.
951 static u64
ata_set_native_max_address(struct ata_device
*dev
, u64 new_sectors
)
954 struct ata_taskfile tf
;
958 ata_tf_init(dev
, &tf
);
960 tf
.command
= ATA_CMD_SET_MAX
;
961 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
962 tf
.protocol
|= ATA_PROT_NODATA
;
964 tf
.lbal
= (new_sectors
>> 0) & 0xff;
965 tf
.lbam
= (new_sectors
>> 8) & 0xff;
966 tf
.lbah
= (new_sectors
>> 16) & 0xff;
967 tf
.device
|= ((new_sectors
>> 24) & 0x0f) | 0x40;
969 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
973 return ata_tf_to_lba(&tf
);
977 * ata_hpa_resize - Resize a device with an HPA set
978 * @dev: Device to resize
980 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
981 * it if required to the full size of the media. The caller must check
982 * the drive has the HPA feature set enabled.
985 static u64
ata_hpa_resize(struct ata_device
*dev
)
987 u64 sectors
= dev
->n_sectors
;
990 if (ata_id_has_lba48(dev
->id
))
991 hpa_sectors
= ata_read_native_max_address_ext(dev
);
993 hpa_sectors
= ata_read_native_max_address(dev
);
995 if (hpa_sectors
> sectors
) {
996 ata_dev_printk(dev
, KERN_INFO
,
997 "Host Protected Area detected:\n"
998 "\tcurrent size: %lld sectors\n"
999 "\tnative size: %lld sectors\n",
1000 (long long)sectors
, (long long)hpa_sectors
);
1002 if (ata_ignore_hpa
) {
1003 if (ata_id_has_lba48(dev
->id
))
1004 hpa_sectors
= ata_set_native_max_address_ext(dev
, hpa_sectors
);
1006 hpa_sectors
= ata_set_native_max_address(dev
,
1010 ata_dev_printk(dev
, KERN_INFO
, "native size "
1011 "increased to %lld sectors\n",
1012 (long long)hpa_sectors
);
1016 } else if (hpa_sectors
< sectors
)
1017 ata_dev_printk(dev
, KERN_WARNING
, "%s 1: hpa sectors (%lld) "
1018 "is smaller than sectors (%lld)\n", __FUNCTION__
,
1019 (long long)hpa_sectors
, (long long)sectors
);
1024 static u64
ata_id_n_sectors(const u16
*id
)
1026 if (ata_id_has_lba(id
)) {
1027 if (ata_id_has_lba48(id
))
1028 return ata_id_u64(id
, 100);
1030 return ata_id_u32(id
, 60);
1032 if (ata_id_current_chs_valid(id
))
1033 return ata_id_u32(id
, 57);
1035 return id
[1] * id
[3] * id
[6];
1040 * ata_id_to_dma_mode - Identify DMA mode from id block
1041 * @dev: device to identify
1042 * @unknown: mode to assume if we cannot tell
1044 * Set up the timing values for the device based upon the identify
1045 * reported values for the DMA mode. This function is used by drivers
1046 * which rely upon firmware configured modes, but wish to report the
1047 * mode correctly when possible.
1049 * In addition we emit similarly formatted messages to the default
1050 * ata_dev_set_mode handler, in order to provide consistency of
1054 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1059 /* Pack the DMA modes */
1060 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1061 if (dev
->id
[53] & 0x04)
1062 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1064 /* Select the mode in use */
1065 mode
= ata_xfer_mask2mode(mask
);
1068 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1069 ata_mode_string(mask
));
1071 /* SWDMA perhaps ? */
1073 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1076 /* Configure the device reporting */
1077 dev
->xfer_mode
= mode
;
1078 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1082 * ata_noop_dev_select - Select device 0/1 on ATA bus
1083 * @ap: ATA channel to manipulate
1084 * @device: ATA device (numbered from zero) to select
1086 * This function performs no actual function.
1088 * May be used as the dev_select() entry in ata_port_operations.
1093 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1099 * ata_std_dev_select - Select device 0/1 on ATA bus
1100 * @ap: ATA channel to manipulate
1101 * @device: ATA device (numbered from zero) to select
1103 * Use the method defined in the ATA specification to
1104 * make either device 0, or device 1, active on the
1105 * ATA channel. Works with both PIO and MMIO.
1107 * May be used as the dev_select() entry in ata_port_operations.
1113 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1118 tmp
= ATA_DEVICE_OBS
;
1120 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1122 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1123 ata_pause(ap
); /* needed; also flushes, for mmio */
1127 * ata_dev_select - Select device 0/1 on ATA bus
1128 * @ap: ATA channel to manipulate
1129 * @device: ATA device (numbered from zero) to select
1130 * @wait: non-zero to wait for Status register BSY bit to clear
1131 * @can_sleep: non-zero if context allows sleeping
1133 * Use the method defined in the ATA specification to
1134 * make either device 0, or device 1, active on the
1137 * This is a high-level version of ata_std_dev_select(),
1138 * which additionally provides the services of inserting
1139 * the proper pauses and status polling, where needed.
1145 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1146 unsigned int wait
, unsigned int can_sleep
)
1148 if (ata_msg_probe(ap
))
1149 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1150 "device %u, wait %u\n", device
, wait
);
1155 ap
->ops
->dev_select(ap
, device
);
1158 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1165 * ata_dump_id - IDENTIFY DEVICE info debugging output
1166 * @id: IDENTIFY DEVICE page to dump
1168 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1175 static inline void ata_dump_id(const u16
*id
)
1177 DPRINTK("49==0x%04x "
1187 DPRINTK("80==0x%04x "
1197 DPRINTK("88==0x%04x "
1204 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1205 * @id: IDENTIFY data to compute xfer mask from
1207 * Compute the xfermask for this device. This is not as trivial
1208 * as it seems if we must consider early devices correctly.
1210 * FIXME: pre IDE drive timing (do we care ?).
1218 static unsigned int ata_id_xfermask(const u16
*id
)
1220 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1222 /* Usual case. Word 53 indicates word 64 is valid */
1223 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1224 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1228 /* If word 64 isn't valid then Word 51 high byte holds
1229 * the PIO timing number for the maximum. Turn it into
1232 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1233 if (mode
< 5) /* Valid PIO range */
1234 pio_mask
= (2 << mode
) - 1;
1238 /* But wait.. there's more. Design your standards by
1239 * committee and you too can get a free iordy field to
1240 * process. However its the speeds not the modes that
1241 * are supported... Note drivers using the timing API
1242 * will get this right anyway
1246 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1248 if (ata_id_is_cfa(id
)) {
1250 * Process compact flash extended modes
1252 int pio
= id
[163] & 0x7;
1253 int dma
= (id
[163] >> 3) & 7;
1256 pio_mask
|= (1 << 5);
1258 pio_mask
|= (1 << 6);
1260 mwdma_mask
|= (1 << 3);
1262 mwdma_mask
|= (1 << 4);
1266 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1267 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1269 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1273 * ata_port_queue_task - Queue port_task
1274 * @ap: The ata_port to queue port_task for
1275 * @fn: workqueue function to be scheduled
1276 * @data: data for @fn to use
1277 * @delay: delay time for workqueue function
1279 * Schedule @fn(@data) for execution after @delay jiffies using
1280 * port_task. There is one port_task per port and it's the
1281 * user(low level driver)'s responsibility to make sure that only
1282 * one task is active at any given time.
1284 * libata core layer takes care of synchronization between
1285 * port_task and EH. ata_port_queue_task() may be ignored for EH
1289 * Inherited from caller.
1291 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1292 unsigned long delay
)
1294 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1295 ap
->port_task_data
= data
;
1297 /* may fail if ata_port_flush_task() in progress */
1298 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1302 * ata_port_flush_task - Flush port_task
1303 * @ap: The ata_port to flush port_task for
1305 * After this function completes, port_task is guranteed not to
1306 * be running or scheduled.
1309 * Kernel thread context (may sleep)
1311 void ata_port_flush_task(struct ata_port
*ap
)
1315 cancel_rearming_delayed_work(&ap
->port_task
);
1317 if (ata_msg_ctl(ap
))
1318 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1321 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1323 struct completion
*waiting
= qc
->private_data
;
1329 * ata_exec_internal_sg - execute libata internal command
1330 * @dev: Device to which the command is sent
1331 * @tf: Taskfile registers for the command and the result
1332 * @cdb: CDB for packet command
1333 * @dma_dir: Data tranfer direction of the command
1334 * @sg: sg list for the data buffer of the command
1335 * @n_elem: Number of sg entries
1337 * Executes libata internal command with timeout. @tf contains
1338 * command on entry and result on return. Timeout and error
1339 * conditions are reported via return value. No recovery action
1340 * is taken after a command times out. It's caller's duty to
1341 * clean up after timeout.
1344 * None. Should be called with kernel context, might sleep.
1347 * Zero on success, AC_ERR_* mask on failure
1349 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1350 struct ata_taskfile
*tf
, const u8
*cdb
,
1351 int dma_dir
, struct scatterlist
*sg
,
1352 unsigned int n_elem
)
1354 struct ata_link
*link
= dev
->link
;
1355 struct ata_port
*ap
= link
->ap
;
1356 u8 command
= tf
->command
;
1357 struct ata_queued_cmd
*qc
;
1358 unsigned int tag
, preempted_tag
;
1359 u32 preempted_sactive
, preempted_qc_active
;
1360 DECLARE_COMPLETION_ONSTACK(wait
);
1361 unsigned long flags
;
1362 unsigned int err_mask
;
1365 spin_lock_irqsave(ap
->lock
, flags
);
1367 /* no internal command while frozen */
1368 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1369 spin_unlock_irqrestore(ap
->lock
, flags
);
1370 return AC_ERR_SYSTEM
;
1373 /* initialize internal qc */
1375 /* XXX: Tag 0 is used for drivers with legacy EH as some
1376 * drivers choke if any other tag is given. This breaks
1377 * ata_tag_internal() test for those drivers. Don't use new
1378 * EH stuff without converting to it.
1380 if (ap
->ops
->error_handler
)
1381 tag
= ATA_TAG_INTERNAL
;
1385 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1387 qc
= __ata_qc_from_tag(ap
, tag
);
1395 preempted_tag
= link
->active_tag
;
1396 preempted_sactive
= link
->sactive
;
1397 preempted_qc_active
= ap
->qc_active
;
1398 link
->active_tag
= ATA_TAG_POISON
;
1402 /* prepare & issue qc */
1405 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1406 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1407 qc
->dma_dir
= dma_dir
;
1408 if (dma_dir
!= DMA_NONE
) {
1409 unsigned int i
, buflen
= 0;
1411 for (i
= 0; i
< n_elem
; i
++)
1412 buflen
+= sg
[i
].length
;
1414 ata_sg_init(qc
, sg
, n_elem
);
1415 qc
->nbytes
= buflen
;
1418 qc
->private_data
= &wait
;
1419 qc
->complete_fn
= ata_qc_complete_internal
;
1423 spin_unlock_irqrestore(ap
->lock
, flags
);
1425 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1427 ata_port_flush_task(ap
);
1430 spin_lock_irqsave(ap
->lock
, flags
);
1432 /* We're racing with irq here. If we lose, the
1433 * following test prevents us from completing the qc
1434 * twice. If we win, the port is frozen and will be
1435 * cleaned up by ->post_internal_cmd().
1437 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1438 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1440 if (ap
->ops
->error_handler
)
1441 ata_port_freeze(ap
);
1443 ata_qc_complete(qc
);
1445 if (ata_msg_warn(ap
))
1446 ata_dev_printk(dev
, KERN_WARNING
,
1447 "qc timeout (cmd 0x%x)\n", command
);
1450 spin_unlock_irqrestore(ap
->lock
, flags
);
1453 /* do post_internal_cmd */
1454 if (ap
->ops
->post_internal_cmd
)
1455 ap
->ops
->post_internal_cmd(qc
);
1457 /* perform minimal error analysis */
1458 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1459 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1460 qc
->err_mask
|= AC_ERR_DEV
;
1463 qc
->err_mask
|= AC_ERR_OTHER
;
1465 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1466 qc
->err_mask
&= ~AC_ERR_OTHER
;
1470 spin_lock_irqsave(ap
->lock
, flags
);
1472 *tf
= qc
->result_tf
;
1473 err_mask
= qc
->err_mask
;
1476 link
->active_tag
= preempted_tag
;
1477 link
->sactive
= preempted_sactive
;
1478 ap
->qc_active
= preempted_qc_active
;
1480 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1481 * Until those drivers are fixed, we detect the condition
1482 * here, fail the command with AC_ERR_SYSTEM and reenable the
1485 * Note that this doesn't change any behavior as internal
1486 * command failure results in disabling the device in the
1487 * higher layer for LLDDs without new reset/EH callbacks.
1489 * Kill the following code as soon as those drivers are fixed.
1491 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1492 err_mask
|= AC_ERR_SYSTEM
;
1496 spin_unlock_irqrestore(ap
->lock
, flags
);
1502 * ata_exec_internal - execute libata internal command
1503 * @dev: Device to which the command is sent
1504 * @tf: Taskfile registers for the command and the result
1505 * @cdb: CDB for packet command
1506 * @dma_dir: Data tranfer direction of the command
1507 * @buf: Data buffer of the command
1508 * @buflen: Length of data buffer
1510 * Wrapper around ata_exec_internal_sg() which takes simple
1511 * buffer instead of sg list.
1514 * None. Should be called with kernel context, might sleep.
1517 * Zero on success, AC_ERR_* mask on failure
1519 unsigned ata_exec_internal(struct ata_device
*dev
,
1520 struct ata_taskfile
*tf
, const u8
*cdb
,
1521 int dma_dir
, void *buf
, unsigned int buflen
)
1523 struct scatterlist
*psg
= NULL
, sg
;
1524 unsigned int n_elem
= 0;
1526 if (dma_dir
!= DMA_NONE
) {
1528 sg_init_one(&sg
, buf
, buflen
);
1533 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1537 * ata_do_simple_cmd - execute simple internal command
1538 * @dev: Device to which the command is sent
1539 * @cmd: Opcode to execute
1541 * Execute a 'simple' command, that only consists of the opcode
1542 * 'cmd' itself, without filling any other registers
1545 * Kernel thread context (may sleep).
1548 * Zero on success, AC_ERR_* mask on failure
1550 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1552 struct ata_taskfile tf
;
1554 ata_tf_init(dev
, &tf
);
1557 tf
.flags
|= ATA_TFLAG_DEVICE
;
1558 tf
.protocol
= ATA_PROT_NODATA
;
1560 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1564 * ata_pio_need_iordy - check if iordy needed
1567 * Check if the current speed of the device requires IORDY. Used
1568 * by various controllers for chip configuration.
1571 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1573 /* Controller doesn't support IORDY. Probably a pointless check
1574 as the caller should know this */
1575 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1577 /* PIO3 and higher it is mandatory */
1578 if (adev
->pio_mode
> XFER_PIO_2
)
1580 /* We turn it on when possible */
1581 if (ata_id_has_iordy(adev
->id
))
1587 * ata_pio_mask_no_iordy - Return the non IORDY mask
1590 * Compute the highest mode possible if we are not using iordy. Return
1591 * -1 if no iordy mode is available.
1594 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1596 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1597 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1598 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1599 /* Is the speed faster than the drive allows non IORDY ? */
1601 /* This is cycle times not frequency - watch the logic! */
1602 if (pio
> 240) /* PIO2 is 240nS per cycle */
1603 return 3 << ATA_SHIFT_PIO
;
1604 return 7 << ATA_SHIFT_PIO
;
1607 return 3 << ATA_SHIFT_PIO
;
1611 * ata_dev_read_id - Read ID data from the specified device
1612 * @dev: target device
1613 * @p_class: pointer to class of the target device (may be changed)
1614 * @flags: ATA_READID_* flags
1615 * @id: buffer to read IDENTIFY data into
1617 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1618 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1619 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1620 * for pre-ATA4 drives.
1622 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1623 * now we abort if we hit that case.
1626 * Kernel thread context (may sleep)
1629 * 0 on success, -errno otherwise.
1631 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1632 unsigned int flags
, u16
*id
)
1634 struct ata_port
*ap
= dev
->link
->ap
;
1635 unsigned int class = *p_class
;
1636 struct ata_taskfile tf
;
1637 unsigned int err_mask
= 0;
1639 int may_fallback
= 1, tried_spinup
= 0;
1642 if (ata_msg_ctl(ap
))
1643 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1645 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1647 ata_tf_init(dev
, &tf
);
1651 tf
.command
= ATA_CMD_ID_ATA
;
1654 tf
.command
= ATA_CMD_ID_ATAPI
;
1658 reason
= "unsupported class";
1662 tf
.protocol
= ATA_PROT_PIO
;
1664 /* Some devices choke if TF registers contain garbage. Make
1665 * sure those are properly initialized.
1667 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1669 /* Device presence detection is unreliable on some
1670 * controllers. Always poll IDENTIFY if available.
1672 tf
.flags
|= ATA_TFLAG_POLLING
;
1674 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1675 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1677 if (err_mask
& AC_ERR_NODEV_HINT
) {
1678 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1679 ap
->print_id
, dev
->devno
);
1683 /* Device or controller might have reported the wrong
1684 * device class. Give a shot at the other IDENTIFY if
1685 * the current one is aborted by the device.
1688 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1691 if (class == ATA_DEV_ATA
)
1692 class = ATA_DEV_ATAPI
;
1694 class = ATA_DEV_ATA
;
1699 reason
= "I/O error";
1703 /* Falling back doesn't make sense if ID data was read
1704 * successfully at least once.
1708 swap_buf_le16(id
, ATA_ID_WORDS
);
1712 reason
= "device reports invalid type";
1714 if (class == ATA_DEV_ATA
) {
1715 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1718 if (ata_id_is_ata(id
))
1722 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1725 * Drive powered-up in standby mode, and requires a specific
1726 * SET_FEATURES spin-up subcommand before it will accept
1727 * anything other than the original IDENTIFY command.
1729 ata_tf_init(dev
, &tf
);
1730 tf
.command
= ATA_CMD_SET_FEATURES
;
1731 tf
.feature
= SETFEATURES_SPINUP
;
1732 tf
.protocol
= ATA_PROT_NODATA
;
1733 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1734 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1735 if (err_mask
&& id
[2] != 0x738c) {
1737 reason
= "SPINUP failed";
1741 * If the drive initially returned incomplete IDENTIFY info,
1742 * we now must reissue the IDENTIFY command.
1744 if (id
[2] == 0x37c8)
1748 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1750 * The exact sequence expected by certain pre-ATA4 drives is:
1752 * IDENTIFY (optional in early ATA)
1753 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1755 * Some drives were very specific about that exact sequence.
1757 * Note that ATA4 says lba is mandatory so the second check
1758 * shoud never trigger.
1760 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1761 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1764 reason
= "INIT_DEV_PARAMS failed";
1768 /* current CHS translation info (id[53-58]) might be
1769 * changed. reread the identify device info.
1771 flags
&= ~ATA_READID_POSTRESET
;
1781 if (ata_msg_warn(ap
))
1782 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1783 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1787 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1789 struct ata_port
*ap
= dev
->link
->ap
;
1790 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1793 static void ata_dev_config_ncq(struct ata_device
*dev
,
1794 char *desc
, size_t desc_sz
)
1796 struct ata_port
*ap
= dev
->link
->ap
;
1797 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1799 if (!ata_id_has_ncq(dev
->id
)) {
1803 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1804 snprintf(desc
, desc_sz
, "NCQ (not used)");
1807 if (ap
->flags
& ATA_FLAG_NCQ
) {
1808 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1809 dev
->flags
|= ATA_DFLAG_NCQ
;
1812 if (hdepth
>= ddepth
)
1813 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1815 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1819 * ata_dev_configure - Configure the specified ATA/ATAPI device
1820 * @dev: Target device to configure
1822 * Configure @dev according to @dev->id. Generic and low-level
1823 * driver specific fixups are also applied.
1826 * Kernel thread context (may sleep)
1829 * 0 on success, -errno otherwise
1831 int ata_dev_configure(struct ata_device
*dev
)
1833 struct ata_port
*ap
= dev
->link
->ap
;
1834 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1835 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1836 const u16
*id
= dev
->id
;
1837 unsigned int xfer_mask
;
1838 char revbuf
[7]; /* XYZ-99\0 */
1839 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1840 char modelbuf
[ATA_ID_PROD_LEN
+1];
1843 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1844 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1849 if (ata_msg_probe(ap
))
1850 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1853 dev
->horkage
|= ata_dev_blacklisted(dev
);
1855 /* let ACPI work its magic */
1856 rc
= ata_acpi_on_devcfg(dev
);
1860 /* print device capabilities */
1861 if (ata_msg_probe(ap
))
1862 ata_dev_printk(dev
, KERN_DEBUG
,
1863 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1864 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1866 id
[49], id
[82], id
[83], id
[84],
1867 id
[85], id
[86], id
[87], id
[88]);
1869 /* initialize to-be-configured parameters */
1870 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1871 dev
->max_sectors
= 0;
1879 * common ATA, ATAPI feature tests
1882 /* find max transfer mode; for printk only */
1883 xfer_mask
= ata_id_xfermask(id
);
1885 if (ata_msg_probe(ap
))
1888 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1889 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1892 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1895 /* ATA-specific feature tests */
1896 if (dev
->class == ATA_DEV_ATA
) {
1897 if (ata_id_is_cfa(id
)) {
1898 if (id
[162] & 1) /* CPRM may make this media unusable */
1899 ata_dev_printk(dev
, KERN_WARNING
,
1900 "supports DRM functions and may "
1901 "not be fully accessable.\n");
1902 snprintf(revbuf
, 7, "CFA");
1905 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1907 dev
->n_sectors
= ata_id_n_sectors(id
);
1909 if (dev
->id
[59] & 0x100)
1910 dev
->multi_count
= dev
->id
[59] & 0xff;
1912 if (ata_id_has_lba(id
)) {
1913 const char *lba_desc
;
1917 dev
->flags
|= ATA_DFLAG_LBA
;
1918 if (ata_id_has_lba48(id
)) {
1919 dev
->flags
|= ATA_DFLAG_LBA48
;
1922 if (dev
->n_sectors
>= (1UL << 28) &&
1923 ata_id_has_flush_ext(id
))
1924 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1927 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
) &&
1928 ata_id_hpa_enabled(dev
->id
))
1929 dev
->n_sectors
= ata_hpa_resize(dev
);
1932 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1934 /* print device info to dmesg */
1935 if (ata_msg_drv(ap
) && print_info
) {
1936 ata_dev_printk(dev
, KERN_INFO
,
1937 "%s: %s, %s, max %s\n",
1938 revbuf
, modelbuf
, fwrevbuf
,
1939 ata_mode_string(xfer_mask
));
1940 ata_dev_printk(dev
, KERN_INFO
,
1941 "%Lu sectors, multi %u: %s %s\n",
1942 (unsigned long long)dev
->n_sectors
,
1943 dev
->multi_count
, lba_desc
, ncq_desc
);
1948 /* Default translation */
1949 dev
->cylinders
= id
[1];
1951 dev
->sectors
= id
[6];
1953 if (ata_id_current_chs_valid(id
)) {
1954 /* Current CHS translation is valid. */
1955 dev
->cylinders
= id
[54];
1956 dev
->heads
= id
[55];
1957 dev
->sectors
= id
[56];
1960 /* print device info to dmesg */
1961 if (ata_msg_drv(ap
) && print_info
) {
1962 ata_dev_printk(dev
, KERN_INFO
,
1963 "%s: %s, %s, max %s\n",
1964 revbuf
, modelbuf
, fwrevbuf
,
1965 ata_mode_string(xfer_mask
));
1966 ata_dev_printk(dev
, KERN_INFO
,
1967 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1968 (unsigned long long)dev
->n_sectors
,
1969 dev
->multi_count
, dev
->cylinders
,
1970 dev
->heads
, dev
->sectors
);
1977 /* ATAPI-specific feature tests */
1978 else if (dev
->class == ATA_DEV_ATAPI
) {
1979 char *cdb_intr_string
= "";
1981 rc
= atapi_cdb_len(id
);
1982 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1983 if (ata_msg_warn(ap
))
1984 ata_dev_printk(dev
, KERN_WARNING
,
1985 "unsupported CDB len\n");
1989 dev
->cdb_len
= (unsigned int) rc
;
1992 * check to see if this ATAPI device supports
1993 * Asynchronous Notification
1995 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_AN(id
)) {
1997 /* issue SET feature command to turn this on */
1998 err
= ata_dev_set_AN(dev
, SETFEATURES_SATA_ENABLE
);
2000 ata_dev_printk(dev
, KERN_ERR
,
2001 "unable to set AN, err %x\n",
2004 dev
->flags
|= ATA_DFLAG_AN
;
2007 if (ata_id_cdb_intr(dev
->id
)) {
2008 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2009 cdb_intr_string
= ", CDB intr";
2012 /* print device info to dmesg */
2013 if (ata_msg_drv(ap
) && print_info
)
2014 ata_dev_printk(dev
, KERN_INFO
,
2015 "ATAPI: %s, %s, max %s%s\n",
2017 ata_mode_string(xfer_mask
),
2021 /* determine max_sectors */
2022 dev
->max_sectors
= ATA_MAX_SECTORS
;
2023 if (dev
->flags
& ATA_DFLAG_LBA48
)
2024 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2026 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2027 /* Let the user know. We don't want to disallow opens for
2028 rescue purposes, or in case the vendor is just a blithering
2031 ata_dev_printk(dev
, KERN_WARNING
,
2032 "Drive reports diagnostics failure. This may indicate a drive\n");
2033 ata_dev_printk(dev
, KERN_WARNING
,
2034 "fault or invalid emulation. Contact drive vendor for information.\n");
2038 /* limit bridge transfers to udma5, 200 sectors */
2039 if (ata_dev_knobble(dev
)) {
2040 if (ata_msg_drv(ap
) && print_info
)
2041 ata_dev_printk(dev
, KERN_INFO
,
2042 "applying bridge limits\n");
2043 dev
->udma_mask
&= ATA_UDMA5
;
2044 dev
->max_sectors
= ATA_MAX_SECTORS
;
2047 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2048 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2051 if (ap
->ops
->dev_config
)
2052 ap
->ops
->dev_config(dev
);
2054 if (ata_msg_probe(ap
))
2055 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2056 __FUNCTION__
, ata_chk_status(ap
));
2060 if (ata_msg_probe(ap
))
2061 ata_dev_printk(dev
, KERN_DEBUG
,
2062 "%s: EXIT, err\n", __FUNCTION__
);
2067 * ata_cable_40wire - return 40 wire cable type
2070 * Helper method for drivers which want to hardwire 40 wire cable
2074 int ata_cable_40wire(struct ata_port
*ap
)
2076 return ATA_CBL_PATA40
;
2080 * ata_cable_80wire - return 80 wire cable type
2083 * Helper method for drivers which want to hardwire 80 wire cable
2087 int ata_cable_80wire(struct ata_port
*ap
)
2089 return ATA_CBL_PATA80
;
2093 * ata_cable_unknown - return unknown PATA cable.
2096 * Helper method for drivers which have no PATA cable detection.
2099 int ata_cable_unknown(struct ata_port
*ap
)
2101 return ATA_CBL_PATA_UNK
;
2105 * ata_cable_sata - return SATA cable type
2108 * Helper method for drivers which have SATA cables
2111 int ata_cable_sata(struct ata_port
*ap
)
2113 return ATA_CBL_SATA
;
2117 * ata_bus_probe - Reset and probe ATA bus
2120 * Master ATA bus probing function. Initiates a hardware-dependent
2121 * bus reset, then attempts to identify any devices found on
2125 * PCI/etc. bus probe sem.
2128 * Zero on success, negative errno otherwise.
2131 int ata_bus_probe(struct ata_port
*ap
)
2133 unsigned int classes
[ATA_MAX_DEVICES
];
2134 int tries
[ATA_MAX_DEVICES
];
2136 struct ata_device
*dev
;
2140 ata_link_for_each_dev(dev
, &ap
->link
)
2141 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2144 /* reset and determine device classes */
2145 ap
->ops
->phy_reset(ap
);
2147 ata_link_for_each_dev(dev
, &ap
->link
) {
2148 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2149 dev
->class != ATA_DEV_UNKNOWN
)
2150 classes
[dev
->devno
] = dev
->class;
2152 classes
[dev
->devno
] = ATA_DEV_NONE
;
2154 dev
->class = ATA_DEV_UNKNOWN
;
2159 /* after the reset the device state is PIO 0 and the controller
2160 state is undefined. Record the mode */
2162 ata_link_for_each_dev(dev
, &ap
->link
)
2163 dev
->pio_mode
= XFER_PIO_0
;
2165 /* read IDENTIFY page and configure devices. We have to do the identify
2166 specific sequence bass-ackwards so that PDIAG- is released by
2169 ata_link_for_each_dev(dev
, &ap
->link
) {
2170 if (tries
[dev
->devno
])
2171 dev
->class = classes
[dev
->devno
];
2173 if (!ata_dev_enabled(dev
))
2176 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2182 /* Now ask for the cable type as PDIAG- should have been released */
2183 if (ap
->ops
->cable_detect
)
2184 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2186 /* We may have SATA bridge glue hiding here irrespective of the
2187 reported cable types and sensed types */
2188 ata_link_for_each_dev(dev
, &ap
->link
) {
2189 if (!ata_dev_enabled(dev
))
2191 /* SATA drives indicate we have a bridge. We don't know which
2192 end of the link the bridge is which is a problem */
2193 if (ata_id_is_sata(dev
->id
))
2194 ap
->cbl
= ATA_CBL_SATA
;
2197 /* After the identify sequence we can now set up the devices. We do
2198 this in the normal order so that the user doesn't get confused */
2200 ata_link_for_each_dev(dev
, &ap
->link
) {
2201 if (!ata_dev_enabled(dev
))
2204 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2205 rc
= ata_dev_configure(dev
);
2206 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2211 /* configure transfer mode */
2212 rc
= ata_set_mode(&ap
->link
, &dev
);
2216 ata_link_for_each_dev(dev
, &ap
->link
)
2217 if (ata_dev_enabled(dev
))
2220 /* no device present, disable port */
2221 ata_port_disable(ap
);
2225 tries
[dev
->devno
]--;
2229 /* eeek, something went very wrong, give up */
2230 tries
[dev
->devno
] = 0;
2234 /* give it just one more chance */
2235 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2237 if (tries
[dev
->devno
] == 1) {
2238 /* This is the last chance, better to slow
2239 * down than lose it.
2241 sata_down_spd_limit(&ap
->link
);
2242 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2246 if (!tries
[dev
->devno
])
2247 ata_dev_disable(dev
);
2253 * ata_port_probe - Mark port as enabled
2254 * @ap: Port for which we indicate enablement
2256 * Modify @ap data structure such that the system
2257 * thinks that the entire port is enabled.
2259 * LOCKING: host lock, or some other form of
2263 void ata_port_probe(struct ata_port
*ap
)
2265 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2269 * sata_print_link_status - Print SATA link status
2270 * @link: SATA link to printk link status about
2272 * This function prints link speed and status of a SATA link.
2277 void sata_print_link_status(struct ata_link
*link
)
2279 u32 sstatus
, scontrol
, tmp
;
2281 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2283 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2285 if (ata_link_online(link
)) {
2286 tmp
= (sstatus
>> 4) & 0xf;
2287 ata_link_printk(link
, KERN_INFO
,
2288 "SATA link up %s (SStatus %X SControl %X)\n",
2289 sata_spd_string(tmp
), sstatus
, scontrol
);
2291 ata_link_printk(link
, KERN_INFO
,
2292 "SATA link down (SStatus %X SControl %X)\n",
2298 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2299 * @ap: SATA port associated with target SATA PHY.
2301 * This function issues commands to standard SATA Sxxx
2302 * PHY registers, to wake up the phy (and device), and
2303 * clear any reset condition.
2306 * PCI/etc. bus probe sem.
2309 void __sata_phy_reset(struct ata_port
*ap
)
2311 struct ata_link
*link
= &ap
->link
;
2312 unsigned long timeout
= jiffies
+ (HZ
* 5);
2315 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2316 /* issue phy wake/reset */
2317 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2318 /* Couldn't find anything in SATA I/II specs, but
2319 * AHCI-1.1 10.4.2 says at least 1 ms. */
2322 /* phy wake/clear reset */
2323 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2325 /* wait for phy to become ready, if necessary */
2328 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2329 if ((sstatus
& 0xf) != 1)
2331 } while (time_before(jiffies
, timeout
));
2333 /* print link status */
2334 sata_print_link_status(link
);
2336 /* TODO: phy layer with polling, timeouts, etc. */
2337 if (!ata_link_offline(link
))
2340 ata_port_disable(ap
);
2342 if (ap
->flags
& ATA_FLAG_DISABLED
)
2345 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2346 ata_port_disable(ap
);
2350 ap
->cbl
= ATA_CBL_SATA
;
2354 * sata_phy_reset - Reset SATA bus.
2355 * @ap: SATA port associated with target SATA PHY.
2357 * This function resets the SATA bus, and then probes
2358 * the bus for devices.
2361 * PCI/etc. bus probe sem.
2364 void sata_phy_reset(struct ata_port
*ap
)
2366 __sata_phy_reset(ap
);
2367 if (ap
->flags
& ATA_FLAG_DISABLED
)
2373 * ata_dev_pair - return other device on cable
2376 * Obtain the other device on the same cable, or if none is
2377 * present NULL is returned
2380 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2382 struct ata_link
*link
= adev
->link
;
2383 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2384 if (!ata_dev_enabled(pair
))
2390 * ata_port_disable - Disable port.
2391 * @ap: Port to be disabled.
2393 * Modify @ap data structure such that the system
2394 * thinks that the entire port is disabled, and should
2395 * never attempt to probe or communicate with devices
2398 * LOCKING: host lock, or some other form of
2402 void ata_port_disable(struct ata_port
*ap
)
2404 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2405 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2406 ap
->flags
|= ATA_FLAG_DISABLED
;
2410 * sata_down_spd_limit - adjust SATA spd limit downward
2411 * @link: Link to adjust SATA spd limit for
2413 * Adjust SATA spd limit of @link downward. Note that this
2414 * function only adjusts the limit. The change must be applied
2415 * using sata_set_spd().
2418 * Inherited from caller.
2421 * 0 on success, negative errno on failure
2423 int sata_down_spd_limit(struct ata_link
*link
)
2425 u32 sstatus
, spd
, mask
;
2428 if (!sata_scr_valid(link
))
2431 /* If SCR can be read, use it to determine the current SPD.
2432 * If not, use cached value in link->sata_spd.
2434 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2436 spd
= (sstatus
>> 4) & 0xf;
2438 spd
= link
->sata_spd
;
2440 mask
= link
->sata_spd_limit
;
2444 /* unconditionally mask off the highest bit */
2445 highbit
= fls(mask
) - 1;
2446 mask
&= ~(1 << highbit
);
2448 /* Mask off all speeds higher than or equal to the current
2449 * one. Force 1.5Gbps if current SPD is not available.
2452 mask
&= (1 << (spd
- 1)) - 1;
2456 /* were we already at the bottom? */
2460 link
->sata_spd_limit
= mask
;
2462 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2463 sata_spd_string(fls(mask
)));
2468 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2472 if (link
->sata_spd_limit
== UINT_MAX
)
2475 limit
= fls(link
->sata_spd_limit
);
2477 spd
= (*scontrol
>> 4) & 0xf;
2478 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2480 return spd
!= limit
;
2484 * sata_set_spd_needed - is SATA spd configuration needed
2485 * @link: Link in question
2487 * Test whether the spd limit in SControl matches
2488 * @link->sata_spd_limit. This function is used to determine
2489 * whether hardreset is necessary to apply SATA spd
2493 * Inherited from caller.
2496 * 1 if SATA spd configuration is needed, 0 otherwise.
2498 int sata_set_spd_needed(struct ata_link
*link
)
2502 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2505 return __sata_set_spd_needed(link
, &scontrol
);
2509 * sata_set_spd - set SATA spd according to spd limit
2510 * @link: Link to set SATA spd for
2512 * Set SATA spd of @link according to sata_spd_limit.
2515 * Inherited from caller.
2518 * 0 if spd doesn't need to be changed, 1 if spd has been
2519 * changed. Negative errno if SCR registers are inaccessible.
2521 int sata_set_spd(struct ata_link
*link
)
2526 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2529 if (!__sata_set_spd_needed(link
, &scontrol
))
2532 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2539 * This mode timing computation functionality is ported over from
2540 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2543 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2544 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2545 * for UDMA6, which is currently supported only by Maxtor drives.
2547 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2550 static const struct ata_timing ata_timing
[] = {
2552 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2553 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2554 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2555 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2557 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2558 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2559 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2560 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2561 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2563 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2565 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2566 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2567 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2569 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2570 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2571 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2573 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2574 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2575 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2576 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2578 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2579 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2580 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2582 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2587 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2588 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2590 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2592 q
->setup
= EZ(t
->setup
* 1000, T
);
2593 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2594 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2595 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2596 q
->active
= EZ(t
->active
* 1000, T
);
2597 q
->recover
= EZ(t
->recover
* 1000, T
);
2598 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2599 q
->udma
= EZ(t
->udma
* 1000, UT
);
2602 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2603 struct ata_timing
*m
, unsigned int what
)
2605 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2606 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2607 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2608 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2609 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2610 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2611 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2612 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2615 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2617 const struct ata_timing
*t
;
2619 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2620 if (t
->mode
== 0xFF)
2625 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2626 struct ata_timing
*t
, int T
, int UT
)
2628 const struct ata_timing
*s
;
2629 struct ata_timing p
;
2635 if (!(s
= ata_timing_find_mode(speed
)))
2638 memcpy(t
, s
, sizeof(*s
));
2641 * If the drive is an EIDE drive, it can tell us it needs extended
2642 * PIO/MW_DMA cycle timing.
2645 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2646 memset(&p
, 0, sizeof(p
));
2647 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2648 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2649 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2650 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2651 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2653 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2657 * Convert the timing to bus clock counts.
2660 ata_timing_quantize(t
, t
, T
, UT
);
2663 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2664 * S.M.A.R.T * and some other commands. We have to ensure that the
2665 * DMA cycle timing is slower/equal than the fastest PIO timing.
2668 if (speed
> XFER_PIO_6
) {
2669 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2670 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2674 * Lengthen active & recovery time so that cycle time is correct.
2677 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2678 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2679 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2682 if (t
->active
+ t
->recover
< t
->cycle
) {
2683 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2684 t
->recover
= t
->cycle
- t
->active
;
2687 /* In a few cases quantisation may produce enough errors to
2688 leave t->cycle too low for the sum of active and recovery
2689 if so we must correct this */
2690 if (t
->active
+ t
->recover
> t
->cycle
)
2691 t
->cycle
= t
->active
+ t
->recover
;
2697 * ata_down_xfermask_limit - adjust dev xfer masks downward
2698 * @dev: Device to adjust xfer masks
2699 * @sel: ATA_DNXFER_* selector
2701 * Adjust xfer masks of @dev downward. Note that this function
2702 * does not apply the change. Invoking ata_set_mode() afterwards
2703 * will apply the limit.
2706 * Inherited from caller.
2709 * 0 on success, negative errno on failure
2711 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2714 unsigned int orig_mask
, xfer_mask
;
2715 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2718 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2719 sel
&= ~ATA_DNXFER_QUIET
;
2721 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2724 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2727 case ATA_DNXFER_PIO
:
2728 highbit
= fls(pio_mask
) - 1;
2729 pio_mask
&= ~(1 << highbit
);
2732 case ATA_DNXFER_DMA
:
2734 highbit
= fls(udma_mask
) - 1;
2735 udma_mask
&= ~(1 << highbit
);
2738 } else if (mwdma_mask
) {
2739 highbit
= fls(mwdma_mask
) - 1;
2740 mwdma_mask
&= ~(1 << highbit
);
2746 case ATA_DNXFER_40C
:
2747 udma_mask
&= ATA_UDMA_MASK_40C
;
2750 case ATA_DNXFER_FORCE_PIO0
:
2752 case ATA_DNXFER_FORCE_PIO
:
2761 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2763 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2767 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2768 snprintf(buf
, sizeof(buf
), "%s:%s",
2769 ata_mode_string(xfer_mask
),
2770 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2772 snprintf(buf
, sizeof(buf
), "%s",
2773 ata_mode_string(xfer_mask
));
2775 ata_dev_printk(dev
, KERN_WARNING
,
2776 "limiting speed to %s\n", buf
);
2779 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2785 static int ata_dev_set_mode(struct ata_device
*dev
)
2787 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2788 unsigned int err_mask
;
2791 dev
->flags
&= ~ATA_DFLAG_PIO
;
2792 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2793 dev
->flags
|= ATA_DFLAG_PIO
;
2795 err_mask
= ata_dev_set_xfermode(dev
);
2796 /* Old CFA may refuse this command, which is just fine */
2797 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2798 err_mask
&= ~AC_ERR_DEV
;
2799 /* Some very old devices and some bad newer ones fail any kind of
2800 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2801 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2802 dev
->pio_mode
<= XFER_PIO_2
)
2803 err_mask
&= ~AC_ERR_DEV
;
2805 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2806 "(err_mask=0x%x)\n", err_mask
);
2810 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2811 rc
= ata_dev_revalidate(dev
, 0);
2812 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2816 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2817 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2819 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2820 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2825 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2826 * @link: link on which timings will be programmed
2827 * @r_failed_dev: out paramter for failed device
2829 * Standard implementation of the function used to tune and set
2830 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2831 * ata_dev_set_mode() fails, pointer to the failing device is
2832 * returned in @r_failed_dev.
2835 * PCI/etc. bus probe sem.
2838 * 0 on success, negative errno otherwise
2841 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2843 struct ata_port
*ap
= link
->ap
;
2844 struct ata_device
*dev
;
2845 int rc
= 0, used_dma
= 0, found
= 0;
2847 /* step 1: calculate xfer_mask */
2848 ata_link_for_each_dev(dev
, link
) {
2849 unsigned int pio_mask
, dma_mask
;
2851 if (!ata_dev_enabled(dev
))
2854 ata_dev_xfermask(dev
);
2856 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2857 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2858 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2859 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2868 /* step 2: always set host PIO timings */
2869 ata_link_for_each_dev(dev
, link
) {
2870 if (!ata_dev_enabled(dev
))
2873 if (!dev
->pio_mode
) {
2874 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2879 dev
->xfer_mode
= dev
->pio_mode
;
2880 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2881 if (ap
->ops
->set_piomode
)
2882 ap
->ops
->set_piomode(ap
, dev
);
2885 /* step 3: set host DMA timings */
2886 ata_link_for_each_dev(dev
, link
) {
2887 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2890 dev
->xfer_mode
= dev
->dma_mode
;
2891 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2892 if (ap
->ops
->set_dmamode
)
2893 ap
->ops
->set_dmamode(ap
, dev
);
2896 /* step 4: update devices' xfer mode */
2897 ata_link_for_each_dev(dev
, link
) {
2898 /* don't update suspended devices' xfer mode */
2899 if (!ata_dev_enabled(dev
))
2902 rc
= ata_dev_set_mode(dev
);
2907 /* Record simplex status. If we selected DMA then the other
2908 * host channels are not permitted to do so.
2910 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2911 ap
->host
->simplex_claimed
= ap
;
2915 *r_failed_dev
= dev
;
2920 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2921 * @link: link on which timings will be programmed
2922 * @r_failed_dev: out paramter for failed device
2924 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2925 * ata_set_mode() fails, pointer to the failing device is
2926 * returned in @r_failed_dev.
2929 * PCI/etc. bus probe sem.
2932 * 0 on success, negative errno otherwise
2934 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2936 struct ata_port
*ap
= link
->ap
;
2938 /* has private set_mode? */
2939 if (ap
->ops
->set_mode
)
2940 return ap
->ops
->set_mode(link
, r_failed_dev
);
2941 return ata_do_set_mode(link
, r_failed_dev
);
2945 * ata_tf_to_host - issue ATA taskfile to host controller
2946 * @ap: port to which command is being issued
2947 * @tf: ATA taskfile register set
2949 * Issues ATA taskfile register set to ATA host controller,
2950 * with proper synchronization with interrupt handler and
2954 * spin_lock_irqsave(host lock)
2957 static inline void ata_tf_to_host(struct ata_port
*ap
,
2958 const struct ata_taskfile
*tf
)
2960 ap
->ops
->tf_load(ap
, tf
);
2961 ap
->ops
->exec_command(ap
, tf
);
2965 * ata_busy_sleep - sleep until BSY clears, or timeout
2966 * @ap: port containing status register to be polled
2967 * @tmout_pat: impatience timeout
2968 * @tmout: overall timeout
2970 * Sleep until ATA Status register bit BSY clears,
2971 * or a timeout occurs.
2974 * Kernel thread context (may sleep).
2977 * 0 on success, -errno otherwise.
2979 int ata_busy_sleep(struct ata_port
*ap
,
2980 unsigned long tmout_pat
, unsigned long tmout
)
2982 unsigned long timer_start
, timeout
;
2985 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2986 timer_start
= jiffies
;
2987 timeout
= timer_start
+ tmout_pat
;
2988 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2989 time_before(jiffies
, timeout
)) {
2991 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2994 if (status
!= 0xff && (status
& ATA_BUSY
))
2995 ata_port_printk(ap
, KERN_WARNING
,
2996 "port is slow to respond, please be patient "
2997 "(Status 0x%x)\n", status
);
2999 timeout
= timer_start
+ tmout
;
3000 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3001 time_before(jiffies
, timeout
)) {
3003 status
= ata_chk_status(ap
);
3009 if (status
& ATA_BUSY
) {
3010 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3011 "(%lu secs, Status 0x%x)\n",
3012 tmout
/ HZ
, status
);
3020 * ata_wait_ready - sleep until BSY clears, or timeout
3021 * @ap: port containing status register to be polled
3022 * @deadline: deadline jiffies for the operation
3024 * Sleep until ATA Status register bit BSY clears, or timeout
3028 * Kernel thread context (may sleep).
3031 * 0 on success, -errno otherwise.
3033 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3035 unsigned long start
= jiffies
;
3039 u8 status
= ata_chk_status(ap
);
3040 unsigned long now
= jiffies
;
3042 if (!(status
& ATA_BUSY
))
3044 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3046 if (time_after(now
, deadline
))
3049 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3050 (deadline
- now
> 3 * HZ
)) {
3051 ata_port_printk(ap
, KERN_WARNING
,
3052 "port is slow to respond, please be patient "
3053 "(Status 0x%x)\n", status
);
3061 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3062 unsigned long deadline
)
3064 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3065 unsigned int dev0
= devmask
& (1 << 0);
3066 unsigned int dev1
= devmask
& (1 << 1);
3069 /* if device 0 was found in ata_devchk, wait for its
3073 rc
= ata_wait_ready(ap
, deadline
);
3081 /* if device 1 was found in ata_devchk, wait for register
3082 * access briefly, then wait for BSY to clear.
3087 ap
->ops
->dev_select(ap
, 1);
3089 /* Wait for register access. Some ATAPI devices fail
3090 * to set nsect/lbal after reset, so don't waste too
3091 * much time on it. We're gonna wait for !BSY anyway.
3093 for (i
= 0; i
< 2; i
++) {
3096 nsect
= ioread8(ioaddr
->nsect_addr
);
3097 lbal
= ioread8(ioaddr
->lbal_addr
);
3098 if ((nsect
== 1) && (lbal
== 1))
3100 msleep(50); /* give drive a breather */
3103 rc
= ata_wait_ready(ap
, deadline
);
3111 /* is all this really necessary? */
3112 ap
->ops
->dev_select(ap
, 0);
3114 ap
->ops
->dev_select(ap
, 1);
3116 ap
->ops
->dev_select(ap
, 0);
3121 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3122 unsigned long deadline
)
3124 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3126 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3128 /* software reset. causes dev0 to be selected */
3129 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3130 udelay(20); /* FIXME: flush */
3131 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3132 udelay(20); /* FIXME: flush */
3133 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3135 /* spec mandates ">= 2ms" before checking status.
3136 * We wait 150ms, because that was the magic delay used for
3137 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3138 * between when the ATA command register is written, and then
3139 * status is checked. Because waiting for "a while" before
3140 * checking status is fine, post SRST, we perform this magic
3141 * delay here as well.
3143 * Old drivers/ide uses the 2mS rule and then waits for ready
3147 /* Before we perform post reset processing we want to see if
3148 * the bus shows 0xFF because the odd clown forgets the D7
3149 * pulldown resistor.
3151 if (ata_check_status(ap
) == 0xFF)
3154 return ata_bus_post_reset(ap
, devmask
, deadline
);
3158 * ata_bus_reset - reset host port and associated ATA channel
3159 * @ap: port to reset
3161 * This is typically the first time we actually start issuing
3162 * commands to the ATA channel. We wait for BSY to clear, then
3163 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3164 * result. Determine what devices, if any, are on the channel
3165 * by looking at the device 0/1 error register. Look at the signature
3166 * stored in each device's taskfile registers, to determine if
3167 * the device is ATA or ATAPI.
3170 * PCI/etc. bus probe sem.
3171 * Obtains host lock.
3174 * Sets ATA_FLAG_DISABLED if bus reset fails.
3177 void ata_bus_reset(struct ata_port
*ap
)
3179 struct ata_device
*device
= ap
->link
.device
;
3180 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3181 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3183 unsigned int dev0
, dev1
= 0, devmask
= 0;
3186 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3188 /* determine if device 0/1 are present */
3189 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3192 dev0
= ata_devchk(ap
, 0);
3194 dev1
= ata_devchk(ap
, 1);
3198 devmask
|= (1 << 0);
3200 devmask
|= (1 << 1);
3202 /* select device 0 again */
3203 ap
->ops
->dev_select(ap
, 0);
3205 /* issue bus reset */
3206 if (ap
->flags
& ATA_FLAG_SRST
) {
3207 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3208 if (rc
&& rc
!= -ENODEV
)
3213 * determine by signature whether we have ATA or ATAPI devices
3215 device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
3216 if ((slave_possible
) && (err
!= 0x81))
3217 device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
3219 /* is double-select really necessary? */
3220 if (device
[1].class != ATA_DEV_NONE
)
3221 ap
->ops
->dev_select(ap
, 1);
3222 if (device
[0].class != ATA_DEV_NONE
)
3223 ap
->ops
->dev_select(ap
, 0);
3225 /* if no devices were detected, disable this port */
3226 if ((device
[0].class == ATA_DEV_NONE
) &&
3227 (device
[1].class == ATA_DEV_NONE
))
3230 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3231 /* set up device control for ATA_FLAG_SATA_RESET */
3232 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3239 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3240 ata_port_disable(ap
);
3246 * sata_link_debounce - debounce SATA phy status
3247 * @link: ATA link to debounce SATA phy status for
3248 * @params: timing parameters { interval, duratinon, timeout } in msec
3249 * @deadline: deadline jiffies for the operation
3251 * Make sure SStatus of @link reaches stable state, determined by
3252 * holding the same value where DET is not 1 for @duration polled
3253 * every @interval, before @timeout. Timeout constraints the
3254 * beginning of the stable state. Because DET gets stuck at 1 on
3255 * some controllers after hot unplugging, this functions waits
3256 * until timeout then returns 0 if DET is stable at 1.
3258 * @timeout is further limited by @deadline. The sooner of the
3262 * Kernel thread context (may sleep)
3265 * 0 on success, -errno on failure.
3267 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3268 unsigned long deadline
)
3270 unsigned long interval_msec
= params
[0];
3271 unsigned long duration
= msecs_to_jiffies(params
[1]);
3272 unsigned long last_jiffies
, t
;
3276 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3277 if (time_before(t
, deadline
))
3280 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3285 last_jiffies
= jiffies
;
3288 msleep(interval_msec
);
3289 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3295 if (cur
== 1 && time_before(jiffies
, deadline
))
3297 if (time_after(jiffies
, last_jiffies
+ duration
))
3302 /* unstable, start over */
3304 last_jiffies
= jiffies
;
3306 /* Check deadline. If debouncing failed, return
3307 * -EPIPE to tell upper layer to lower link speed.
3309 if (time_after(jiffies
, deadline
))
3315 * sata_link_resume - resume SATA link
3316 * @link: ATA link to resume SATA
3317 * @params: timing parameters { interval, duratinon, timeout } in msec
3318 * @deadline: deadline jiffies for the operation
3320 * Resume SATA phy @link and debounce it.
3323 * Kernel thread context (may sleep)
3326 * 0 on success, -errno on failure.
3328 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3329 unsigned long deadline
)
3334 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3337 scontrol
= (scontrol
& 0x0f0) | 0x300;
3339 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3342 /* Some PHYs react badly if SStatus is pounded immediately
3343 * after resuming. Delay 200ms before debouncing.
3347 return sata_link_debounce(link
, params
, deadline
);
3351 * ata_std_prereset - prepare for reset
3352 * @link: ATA link to be reset
3353 * @deadline: deadline jiffies for the operation
3355 * @link is about to be reset. Initialize it. Failure from
3356 * prereset makes libata abort whole reset sequence and give up
3357 * that port, so prereset should be best-effort. It does its
3358 * best to prepare for reset sequence but if things go wrong, it
3359 * should just whine, not fail.
3362 * Kernel thread context (may sleep)
3365 * 0 on success, -errno otherwise.
3367 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3369 struct ata_port
*ap
= link
->ap
;
3370 struct ata_eh_context
*ehc
= &link
->eh_context
;
3371 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3374 /* handle link resume */
3375 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3376 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3377 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3379 /* if we're about to do hardreset, nothing more to do */
3380 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3383 /* if SATA, resume link */
3384 if (ap
->flags
& ATA_FLAG_SATA
) {
3385 rc
= sata_link_resume(link
, timing
, deadline
);
3386 /* whine about phy resume failure but proceed */
3387 if (rc
&& rc
!= -EOPNOTSUPP
)
3388 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3389 "link for reset (errno=%d)\n", rc
);
3392 /* Wait for !BSY if the controller can wait for the first D2H
3393 * Reg FIS and we don't know that no device is attached.
3395 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3396 rc
= ata_wait_ready(ap
, deadline
);
3397 if (rc
&& rc
!= -ENODEV
) {
3398 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3399 "(errno=%d), forcing hardreset\n", rc
);
3400 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3408 * ata_std_softreset - reset host port via ATA SRST
3409 * @link: ATA link to reset
3410 * @classes: resulting classes of attached devices
3411 * @deadline: deadline jiffies for the operation
3413 * Reset host port using ATA SRST.
3416 * Kernel thread context (may sleep)
3419 * 0 on success, -errno otherwise.
3421 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3422 unsigned long deadline
)
3424 struct ata_port
*ap
= link
->ap
;
3425 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3426 unsigned int devmask
= 0;
3432 if (ata_link_offline(link
)) {
3433 classes
[0] = ATA_DEV_NONE
;
3437 /* determine if device 0/1 are present */
3438 if (ata_devchk(ap
, 0))
3439 devmask
|= (1 << 0);
3440 if (slave_possible
&& ata_devchk(ap
, 1))
3441 devmask
|= (1 << 1);
3443 /* select device 0 again */
3444 ap
->ops
->dev_select(ap
, 0);
3446 /* issue bus reset */
3447 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3448 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3449 /* if link is occupied, -ENODEV too is an error */
3450 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3451 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3455 /* determine by signature whether we have ATA or ATAPI devices */
3456 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3457 if (slave_possible
&& err
!= 0x81)
3458 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3461 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3466 * sata_link_hardreset - reset link via SATA phy reset
3467 * @link: link to reset
3468 * @timing: timing parameters { interval, duratinon, timeout } in msec
3469 * @deadline: deadline jiffies for the operation
3471 * SATA phy-reset @link using DET bits of SControl register.
3474 * Kernel thread context (may sleep)
3477 * 0 on success, -errno otherwise.
3479 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3480 unsigned long deadline
)
3487 if (sata_set_spd_needed(link
)) {
3488 /* SATA spec says nothing about how to reconfigure
3489 * spd. To be on the safe side, turn off phy during
3490 * reconfiguration. This works for at least ICH7 AHCI
3493 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3496 scontrol
= (scontrol
& 0x0f0) | 0x304;
3498 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3504 /* issue phy wake/reset */
3505 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3508 scontrol
= (scontrol
& 0x0f0) | 0x301;
3510 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3513 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3514 * 10.4.2 says at least 1 ms.
3518 /* bring link back */
3519 rc
= sata_link_resume(link
, timing
, deadline
);
3521 DPRINTK("EXIT, rc=%d\n", rc
);
3526 * sata_std_hardreset - reset host port via SATA phy reset
3527 * @link: link to reset
3528 * @class: resulting class of attached device
3529 * @deadline: deadline jiffies for the operation
3531 * SATA phy-reset host port using DET bits of SControl register,
3532 * wait for !BSY and classify the attached device.
3535 * Kernel thread context (may sleep)
3538 * 0 on success, -errno otherwise.
3540 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3541 unsigned long deadline
)
3543 struct ata_port
*ap
= link
->ap
;
3544 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3550 rc
= sata_link_hardreset(link
, timing
, deadline
);
3552 ata_link_printk(link
, KERN_ERR
,
3553 "COMRESET failed (errno=%d)\n", rc
);
3557 /* TODO: phy layer with polling, timeouts, etc. */
3558 if (ata_link_offline(link
)) {
3559 *class = ATA_DEV_NONE
;
3560 DPRINTK("EXIT, link offline\n");
3564 /* wait a while before checking status, see SRST for more info */
3567 rc
= ata_wait_ready(ap
, deadline
);
3568 /* link occupied, -ENODEV too is an error */
3570 ata_link_printk(link
, KERN_ERR
,
3571 "COMRESET failed (errno=%d)\n", rc
);
3575 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3577 *class = ata_dev_try_classify(ap
, 0, NULL
);
3579 DPRINTK("EXIT, class=%u\n", *class);
3584 * ata_std_postreset - standard postreset callback
3585 * @link: the target ata_link
3586 * @classes: classes of attached devices
3588 * This function is invoked after a successful reset. Note that
3589 * the device might have been reset more than once using
3590 * different reset methods before postreset is invoked.
3593 * Kernel thread context (may sleep)
3595 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3597 struct ata_port
*ap
= link
->ap
;
3602 /* print link status */
3603 sata_print_link_status(link
);
3606 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3607 sata_scr_write(link
, SCR_ERROR
, serror
);
3609 /* is double-select really necessary? */
3610 if (classes
[0] != ATA_DEV_NONE
)
3611 ap
->ops
->dev_select(ap
, 1);
3612 if (classes
[1] != ATA_DEV_NONE
)
3613 ap
->ops
->dev_select(ap
, 0);
3615 /* bail out if no device is present */
3616 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3617 DPRINTK("EXIT, no device\n");
3621 /* set up device control */
3622 if (ap
->ioaddr
.ctl_addr
)
3623 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3629 * ata_dev_same_device - Determine whether new ID matches configured device
3630 * @dev: device to compare against
3631 * @new_class: class of the new device
3632 * @new_id: IDENTIFY page of the new device
3634 * Compare @new_class and @new_id against @dev and determine
3635 * whether @dev is the device indicated by @new_class and
3642 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3644 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3647 const u16
*old_id
= dev
->id
;
3648 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3649 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3651 if (dev
->class != new_class
) {
3652 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3653 dev
->class, new_class
);
3657 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3658 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3659 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3660 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3662 if (strcmp(model
[0], model
[1])) {
3663 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3664 "'%s' != '%s'\n", model
[0], model
[1]);
3668 if (strcmp(serial
[0], serial
[1])) {
3669 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3670 "'%s' != '%s'\n", serial
[0], serial
[1]);
3678 * ata_dev_reread_id - Re-read IDENTIFY data
3679 * @dev: target ATA device
3680 * @readid_flags: read ID flags
3682 * Re-read IDENTIFY page and make sure @dev is still attached to
3686 * Kernel thread context (may sleep)
3689 * 0 on success, negative errno otherwise
3691 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3693 unsigned int class = dev
->class;
3694 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3698 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3702 /* is the device still there? */
3703 if (!ata_dev_same_device(dev
, class, id
))
3706 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3711 * ata_dev_revalidate - Revalidate ATA device
3712 * @dev: device to revalidate
3713 * @readid_flags: read ID flags
3715 * Re-read IDENTIFY page, make sure @dev is still attached to the
3716 * port and reconfigure it according to the new IDENTIFY page.
3719 * Kernel thread context (may sleep)
3722 * 0 on success, negative errno otherwise
3724 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3726 u64 n_sectors
= dev
->n_sectors
;
3729 if (!ata_dev_enabled(dev
))
3733 rc
= ata_dev_reread_id(dev
, readid_flags
);
3737 /* configure device according to the new ID */
3738 rc
= ata_dev_configure(dev
);
3742 /* verify n_sectors hasn't changed */
3743 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3744 dev
->n_sectors
!= n_sectors
) {
3745 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3747 (unsigned long long)n_sectors
,
3748 (unsigned long long)dev
->n_sectors
);
3750 /* restore original n_sectors */
3751 dev
->n_sectors
= n_sectors
;
3760 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3764 struct ata_blacklist_entry
{
3765 const char *model_num
;
3766 const char *model_rev
;
3767 unsigned long horkage
;
3770 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3771 /* Devices with DMA related problems under Linux */
3772 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3773 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3774 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3775 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3776 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3777 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3778 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3779 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3780 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3781 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3782 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3783 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3784 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3785 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3786 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3787 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3788 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3789 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3790 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3791 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3792 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3793 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3794 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3795 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3796 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3797 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3798 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3799 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3800 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3801 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3802 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3803 { "IOMEGA ZIP 250 ATAPI Floppy",
3804 NULL
, ATA_HORKAGE_NODMA
},
3806 /* Weird ATAPI devices */
3807 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3809 /* Devices we expect to fail diagnostics */
3811 /* Devices where NCQ should be avoided */
3813 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3814 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3815 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3817 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3818 { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ
},
3819 { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ
},
3820 { "Maxtor 7B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
, },
3821 { "Maxtor 7B300S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3822 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3823 { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
3824 ATA_HORKAGE_NONCQ
},
3825 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3826 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3827 /* Blacklist entries taken from Silicon Image 3124/3132
3828 Windows driver .inf file - also several Linux problem reports */
3829 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3830 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3831 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3832 /* Drives which do spurious command completion */
3833 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3834 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3835 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3836 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3837 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3838 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3839 { "ST3160812AS", "3.AD", ATA_HORKAGE_NONCQ
, },
3840 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3842 /* devices which puke on READ_NATIVE_MAX */
3843 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3844 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3845 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3846 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3852 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3854 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3855 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3856 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3858 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3859 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3861 while (ad
->model_num
) {
3862 if (!strcmp(ad
->model_num
, model_num
)) {
3863 if (ad
->model_rev
== NULL
)
3865 if (!strcmp(ad
->model_rev
, model_rev
))
3873 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3875 /* We don't support polling DMA.
3876 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3877 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3879 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3880 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3882 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
3886 * ata_dev_xfermask - Compute supported xfermask of the given device
3887 * @dev: Device to compute xfermask for
3889 * Compute supported xfermask of @dev and store it in
3890 * dev->*_mask. This function is responsible for applying all
3891 * known limits including host controller limits, device
3897 static void ata_dev_xfermask(struct ata_device
*dev
)
3899 struct ata_link
*link
= dev
->link
;
3900 struct ata_port
*ap
= link
->ap
;
3901 struct ata_host
*host
= ap
->host
;
3902 unsigned long xfer_mask
;
3904 /* controller modes available */
3905 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3906 ap
->mwdma_mask
, ap
->udma_mask
);
3908 /* drive modes available */
3909 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3910 dev
->mwdma_mask
, dev
->udma_mask
);
3911 xfer_mask
&= ata_id_xfermask(dev
->id
);
3914 * CFA Advanced TrueIDE timings are not allowed on a shared
3917 if (ata_dev_pair(dev
)) {
3918 /* No PIO5 or PIO6 */
3919 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3920 /* No MWDMA3 or MWDMA 4 */
3921 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3924 if (ata_dma_blacklisted(dev
)) {
3925 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3926 ata_dev_printk(dev
, KERN_WARNING
,
3927 "device is on DMA blacklist, disabling DMA\n");
3930 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3931 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3932 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3933 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3934 "other device, disabling DMA\n");
3937 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3938 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3940 if (ap
->ops
->mode_filter
)
3941 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3943 /* Apply cable rule here. Don't apply it early because when
3944 * we handle hot plug the cable type can itself change.
3945 * Check this last so that we know if the transfer rate was
3946 * solely limited by the cable.
3947 * Unknown or 80 wire cables reported host side are checked
3948 * drive side as well. Cases where we know a 40wire cable
3949 * is used safely for 80 are not checked here.
3951 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3952 /* UDMA/44 or higher would be available */
3953 if((ap
->cbl
== ATA_CBL_PATA40
) ||
3954 (ata_drive_40wire(dev
->id
) &&
3955 (ap
->cbl
== ATA_CBL_PATA_UNK
||
3956 ap
->cbl
== ATA_CBL_PATA80
))) {
3957 ata_dev_printk(dev
, KERN_WARNING
,
3958 "limited to UDMA/33 due to 40-wire cable\n");
3959 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3962 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3963 &dev
->mwdma_mask
, &dev
->udma_mask
);
3967 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3968 * @dev: Device to which command will be sent
3970 * Issue SET FEATURES - XFER MODE command to device @dev
3974 * PCI/etc. bus probe sem.
3977 * 0 on success, AC_ERR_* mask otherwise.
3980 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3982 struct ata_taskfile tf
;
3983 unsigned int err_mask
;
3985 /* set up set-features taskfile */
3986 DPRINTK("set features - xfer mode\n");
3988 /* Some controllers and ATAPI devices show flaky interrupt
3989 * behavior after setting xfer mode. Use polling instead.
3991 ata_tf_init(dev
, &tf
);
3992 tf
.command
= ATA_CMD_SET_FEATURES
;
3993 tf
.feature
= SETFEATURES_XFER
;
3994 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
3995 tf
.protocol
= ATA_PROT_NODATA
;
3996 tf
.nsect
= dev
->xfer_mode
;
3998 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4000 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4005 * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
4006 * @dev: Device to which command will be sent
4007 * @enable: Whether to enable or disable the feature
4009 * Issue SET FEATURES - SATA FEATURES command to device @dev
4010 * on port @ap with sector count set to indicate Asynchronous
4011 * Notification feature
4014 * PCI/etc. bus probe sem.
4017 * 0 on success, AC_ERR_* mask otherwise.
4019 static unsigned int ata_dev_set_AN(struct ata_device
*dev
, u8 enable
)
4021 struct ata_taskfile tf
;
4022 unsigned int err_mask
;
4024 /* set up set-features taskfile */
4025 DPRINTK("set features - SATA features\n");
4027 ata_tf_init(dev
, &tf
);
4028 tf
.command
= ATA_CMD_SET_FEATURES
;
4029 tf
.feature
= enable
;
4030 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4031 tf
.protocol
= ATA_PROT_NODATA
;
4034 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4036 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4041 * ata_dev_init_params - Issue INIT DEV PARAMS command
4042 * @dev: Device to which command will be sent
4043 * @heads: Number of heads (taskfile parameter)
4044 * @sectors: Number of sectors (taskfile parameter)
4047 * Kernel thread context (may sleep)
4050 * 0 on success, AC_ERR_* mask otherwise.
4052 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4053 u16 heads
, u16 sectors
)
4055 struct ata_taskfile tf
;
4056 unsigned int err_mask
;
4058 /* Number of sectors per track 1-255. Number of heads 1-16 */
4059 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4060 return AC_ERR_INVALID
;
4062 /* set up init dev params taskfile */
4063 DPRINTK("init dev params \n");
4065 ata_tf_init(dev
, &tf
);
4066 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4067 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4068 tf
.protocol
= ATA_PROT_NODATA
;
4070 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4072 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4073 /* A clean abort indicates an original or just out of spec drive
4074 and we should continue as we issue the setup based on the
4075 drive reported working geometry */
4076 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4079 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4084 * ata_sg_clean - Unmap DMA memory associated with command
4085 * @qc: Command containing DMA memory to be released
4087 * Unmap all mapped DMA memory associated with this command.
4090 * spin_lock_irqsave(host lock)
4092 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4094 struct ata_port
*ap
= qc
->ap
;
4095 struct scatterlist
*sg
= qc
->__sg
;
4096 int dir
= qc
->dma_dir
;
4097 void *pad_buf
= NULL
;
4099 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4100 WARN_ON(sg
== NULL
);
4102 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4103 WARN_ON(qc
->n_elem
> 1);
4105 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4107 /* if we padded the buffer out to 32-bit bound, and data
4108 * xfer direction is from-device, we must copy from the
4109 * pad buffer back into the supplied buffer
4111 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4112 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4114 if (qc
->flags
& ATA_QCFLAG_SG
) {
4116 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4117 /* restore last sg */
4118 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4120 struct scatterlist
*psg
= &qc
->pad_sgent
;
4121 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4122 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4123 kunmap_atomic(addr
, KM_IRQ0
);
4127 dma_unmap_single(ap
->dev
,
4128 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4131 sg
->length
+= qc
->pad_len
;
4133 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4134 pad_buf
, qc
->pad_len
);
4137 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4142 * ata_fill_sg - Fill PCI IDE PRD table
4143 * @qc: Metadata associated with taskfile to be transferred
4145 * Fill PCI IDE PRD (scatter-gather) table with segments
4146 * associated with the current disk command.
4149 * spin_lock_irqsave(host lock)
4152 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4154 struct ata_port
*ap
= qc
->ap
;
4155 struct scatterlist
*sg
;
4158 WARN_ON(qc
->__sg
== NULL
);
4159 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4162 ata_for_each_sg(sg
, qc
) {
4166 /* determine if physical DMA addr spans 64K boundary.
4167 * Note h/w doesn't support 64-bit, so we unconditionally
4168 * truncate dma_addr_t to u32.
4170 addr
= (u32
) sg_dma_address(sg
);
4171 sg_len
= sg_dma_len(sg
);
4174 offset
= addr
& 0xffff;
4176 if ((offset
+ sg_len
) > 0x10000)
4177 len
= 0x10000 - offset
;
4179 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4180 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4181 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4190 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4194 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4195 * @qc: Metadata associated with taskfile to be transferred
4197 * Fill PCI IDE PRD (scatter-gather) table with segments
4198 * associated with the current disk command. Perform the fill
4199 * so that we avoid writing any length 64K records for
4200 * controllers that don't follow the spec.
4203 * spin_lock_irqsave(host lock)
4206 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4208 struct ata_port
*ap
= qc
->ap
;
4209 struct scatterlist
*sg
;
4212 WARN_ON(qc
->__sg
== NULL
);
4213 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4216 ata_for_each_sg(sg
, qc
) {
4218 u32 sg_len
, len
, blen
;
4220 /* determine if physical DMA addr spans 64K boundary.
4221 * Note h/w doesn't support 64-bit, so we unconditionally
4222 * truncate dma_addr_t to u32.
4224 addr
= (u32
) sg_dma_address(sg
);
4225 sg_len
= sg_dma_len(sg
);
4228 offset
= addr
& 0xffff;
4230 if ((offset
+ sg_len
) > 0x10000)
4231 len
= 0x10000 - offset
;
4233 blen
= len
& 0xffff;
4234 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4236 /* Some PATA chipsets like the CS5530 can't
4237 cope with 0x0000 meaning 64K as the spec says */
4238 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4240 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4242 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4243 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4252 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4256 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4257 * @qc: Metadata associated with taskfile to check
4259 * Allow low-level driver to filter ATA PACKET commands, returning
4260 * a status indicating whether or not it is OK to use DMA for the
4261 * supplied PACKET command.
4264 * spin_lock_irqsave(host lock)
4266 * RETURNS: 0 when ATAPI DMA can be used
4269 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4271 struct ata_port
*ap
= qc
->ap
;
4273 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4274 * few ATAPI devices choke on such DMA requests.
4276 if (unlikely(qc
->nbytes
& 15))
4279 if (ap
->ops
->check_atapi_dma
)
4280 return ap
->ops
->check_atapi_dma(qc
);
4286 * ata_qc_prep - Prepare taskfile for submission
4287 * @qc: Metadata associated with taskfile to be prepared
4289 * Prepare ATA taskfile for submission.
4292 * spin_lock_irqsave(host lock)
4294 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4296 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4303 * ata_dumb_qc_prep - Prepare taskfile for submission
4304 * @qc: Metadata associated with taskfile to be prepared
4306 * Prepare ATA taskfile for submission.
4309 * spin_lock_irqsave(host lock)
4311 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4313 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4316 ata_fill_sg_dumb(qc
);
4319 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4322 * ata_sg_init_one - Associate command with memory buffer
4323 * @qc: Command to be associated
4324 * @buf: Memory buffer
4325 * @buflen: Length of memory buffer, in bytes.
4327 * Initialize the data-related elements of queued_cmd @qc
4328 * to point to a single memory buffer, @buf of byte length @buflen.
4331 * spin_lock_irqsave(host lock)
4334 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4336 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4338 qc
->__sg
= &qc
->sgent
;
4340 qc
->orig_n_elem
= 1;
4342 qc
->nbytes
= buflen
;
4344 sg_init_one(&qc
->sgent
, buf
, buflen
);
4348 * ata_sg_init - Associate command with scatter-gather table.
4349 * @qc: Command to be associated
4350 * @sg: Scatter-gather table.
4351 * @n_elem: Number of elements in s/g table.
4353 * Initialize the data-related elements of queued_cmd @qc
4354 * to point to a scatter-gather table @sg, containing @n_elem
4358 * spin_lock_irqsave(host lock)
4361 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4362 unsigned int n_elem
)
4364 qc
->flags
|= ATA_QCFLAG_SG
;
4366 qc
->n_elem
= n_elem
;
4367 qc
->orig_n_elem
= n_elem
;
4371 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4372 * @qc: Command with memory buffer to be mapped.
4374 * DMA-map the memory buffer associated with queued_cmd @qc.
4377 * spin_lock_irqsave(host lock)
4380 * Zero on success, negative on error.
4383 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4385 struct ata_port
*ap
= qc
->ap
;
4386 int dir
= qc
->dma_dir
;
4387 struct scatterlist
*sg
= qc
->__sg
;
4388 dma_addr_t dma_address
;
4391 /* we must lengthen transfers to end on a 32-bit boundary */
4392 qc
->pad_len
= sg
->length
& 3;
4394 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4395 struct scatterlist
*psg
= &qc
->pad_sgent
;
4397 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4399 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4401 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4402 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4405 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4406 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4408 sg
->length
-= qc
->pad_len
;
4409 if (sg
->length
== 0)
4412 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4413 sg
->length
, qc
->pad_len
);
4421 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4423 if (dma_mapping_error(dma_address
)) {
4425 sg
->length
+= qc
->pad_len
;
4429 sg_dma_address(sg
) = dma_address
;
4430 sg_dma_len(sg
) = sg
->length
;
4433 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4434 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4440 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4441 * @qc: Command with scatter-gather table to be mapped.
4443 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4446 * spin_lock_irqsave(host lock)
4449 * Zero on success, negative on error.
4453 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4455 struct ata_port
*ap
= qc
->ap
;
4456 struct scatterlist
*sg
= qc
->__sg
;
4457 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4458 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4460 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4461 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4463 /* we must lengthen transfers to end on a 32-bit boundary */
4464 qc
->pad_len
= lsg
->length
& 3;
4466 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4467 struct scatterlist
*psg
= &qc
->pad_sgent
;
4468 unsigned int offset
;
4470 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4472 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4475 * psg->page/offset are used to copy to-be-written
4476 * data in this function or read data in ata_sg_clean.
4478 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4479 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4480 psg
->offset
= offset_in_page(offset
);
4482 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4483 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4484 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4485 kunmap_atomic(addr
, KM_IRQ0
);
4488 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4489 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4491 lsg
->length
-= qc
->pad_len
;
4492 if (lsg
->length
== 0)
4495 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4496 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4499 pre_n_elem
= qc
->n_elem
;
4500 if (trim_sg
&& pre_n_elem
)
4509 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4511 /* restore last sg */
4512 lsg
->length
+= qc
->pad_len
;
4516 DPRINTK("%d sg elements mapped\n", n_elem
);
4519 qc
->n_elem
= n_elem
;
4525 * swap_buf_le16 - swap halves of 16-bit words in place
4526 * @buf: Buffer to swap
4527 * @buf_words: Number of 16-bit words in buffer.
4529 * Swap halves of 16-bit words if needed to convert from
4530 * little-endian byte order to native cpu byte order, or
4534 * Inherited from caller.
4536 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4541 for (i
= 0; i
< buf_words
; i
++)
4542 buf
[i
] = le16_to_cpu(buf
[i
]);
4543 #endif /* __BIG_ENDIAN */
4547 * ata_data_xfer - Transfer data by PIO
4548 * @adev: device to target
4550 * @buflen: buffer length
4551 * @write_data: read/write
4553 * Transfer data from/to the device data register by PIO.
4556 * Inherited from caller.
4558 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4559 unsigned int buflen
, int write_data
)
4561 struct ata_port
*ap
= adev
->link
->ap
;
4562 unsigned int words
= buflen
>> 1;
4564 /* Transfer multiple of 2 bytes */
4566 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4568 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4570 /* Transfer trailing 1 byte, if any. */
4571 if (unlikely(buflen
& 0x01)) {
4572 u16 align_buf
[1] = { 0 };
4573 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4576 memcpy(align_buf
, trailing_buf
, 1);
4577 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4579 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4580 memcpy(trailing_buf
, align_buf
, 1);
4586 * ata_data_xfer_noirq - Transfer data by PIO
4587 * @adev: device to target
4589 * @buflen: buffer length
4590 * @write_data: read/write
4592 * Transfer data from/to the device data register by PIO. Do the
4593 * transfer with interrupts disabled.
4596 * Inherited from caller.
4598 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4599 unsigned int buflen
, int write_data
)
4601 unsigned long flags
;
4602 local_irq_save(flags
);
4603 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4604 local_irq_restore(flags
);
4609 * ata_pio_sector - Transfer a sector of data.
4610 * @qc: Command on going
4612 * Transfer qc->sect_size bytes of data from/to the ATA device.
4615 * Inherited from caller.
4618 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4620 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4621 struct scatterlist
*sg
= qc
->__sg
;
4622 struct ata_port
*ap
= qc
->ap
;
4624 unsigned int offset
;
4627 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4628 ap
->hsm_task_state
= HSM_ST_LAST
;
4630 page
= sg
[qc
->cursg
].page
;
4631 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4633 /* get the current page and offset */
4634 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4635 offset
%= PAGE_SIZE
;
4637 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4639 if (PageHighMem(page
)) {
4640 unsigned long flags
;
4642 /* FIXME: use a bounce buffer */
4643 local_irq_save(flags
);
4644 buf
= kmap_atomic(page
, KM_IRQ0
);
4646 /* do the actual data transfer */
4647 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4649 kunmap_atomic(buf
, KM_IRQ0
);
4650 local_irq_restore(flags
);
4652 buf
= page_address(page
);
4653 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4656 qc
->curbytes
+= qc
->sect_size
;
4657 qc
->cursg_ofs
+= qc
->sect_size
;
4659 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4666 * ata_pio_sectors - Transfer one or many sectors.
4667 * @qc: Command on going
4669 * Transfer one or many sectors of data from/to the
4670 * ATA device for the DRQ request.
4673 * Inherited from caller.
4676 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4678 if (is_multi_taskfile(&qc
->tf
)) {
4679 /* READ/WRITE MULTIPLE */
4682 WARN_ON(qc
->dev
->multi_count
== 0);
4684 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4685 qc
->dev
->multi_count
);
4691 ata_altstatus(qc
->ap
); /* flush */
4695 * atapi_send_cdb - Write CDB bytes to hardware
4696 * @ap: Port to which ATAPI device is attached.
4697 * @qc: Taskfile currently active
4699 * When device has indicated its readiness to accept
4700 * a CDB, this function is called. Send the CDB.
4706 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4709 DPRINTK("send cdb\n");
4710 WARN_ON(qc
->dev
->cdb_len
< 12);
4712 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4713 ata_altstatus(ap
); /* flush */
4715 switch (qc
->tf
.protocol
) {
4716 case ATA_PROT_ATAPI
:
4717 ap
->hsm_task_state
= HSM_ST
;
4719 case ATA_PROT_ATAPI_NODATA
:
4720 ap
->hsm_task_state
= HSM_ST_LAST
;
4722 case ATA_PROT_ATAPI_DMA
:
4723 ap
->hsm_task_state
= HSM_ST_LAST
;
4724 /* initiate bmdma */
4725 ap
->ops
->bmdma_start(qc
);
4731 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4732 * @qc: Command on going
4733 * @bytes: number of bytes
4735 * Transfer Transfer data from/to the ATAPI device.
4738 * Inherited from caller.
4742 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4744 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4745 struct scatterlist
*sg
= qc
->__sg
;
4746 struct ata_port
*ap
= qc
->ap
;
4749 unsigned int offset
, count
;
4751 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4752 ap
->hsm_task_state
= HSM_ST_LAST
;
4755 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4757 * The end of qc->sg is reached and the device expects
4758 * more data to transfer. In order not to overrun qc->sg
4759 * and fulfill length specified in the byte count register,
4760 * - for read case, discard trailing data from the device
4761 * - for write case, padding zero data to the device
4763 u16 pad_buf
[1] = { 0 };
4764 unsigned int words
= bytes
>> 1;
4767 if (words
) /* warning if bytes > 1 */
4768 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4769 "%u bytes trailing data\n", bytes
);
4771 for (i
= 0; i
< words
; i
++)
4772 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4774 ap
->hsm_task_state
= HSM_ST_LAST
;
4778 sg
= &qc
->__sg
[qc
->cursg
];
4781 offset
= sg
->offset
+ qc
->cursg_ofs
;
4783 /* get the current page and offset */
4784 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4785 offset
%= PAGE_SIZE
;
4787 /* don't overrun current sg */
4788 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4790 /* don't cross page boundaries */
4791 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4793 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4795 if (PageHighMem(page
)) {
4796 unsigned long flags
;
4798 /* FIXME: use bounce buffer */
4799 local_irq_save(flags
);
4800 buf
= kmap_atomic(page
, KM_IRQ0
);
4802 /* do the actual data transfer */
4803 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4805 kunmap_atomic(buf
, KM_IRQ0
);
4806 local_irq_restore(flags
);
4808 buf
= page_address(page
);
4809 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4813 qc
->curbytes
+= count
;
4814 qc
->cursg_ofs
+= count
;
4816 if (qc
->cursg_ofs
== sg
->length
) {
4826 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4827 * @qc: Command on going
4829 * Transfer Transfer data from/to the ATAPI device.
4832 * Inherited from caller.
4835 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4837 struct ata_port
*ap
= qc
->ap
;
4838 struct ata_device
*dev
= qc
->dev
;
4839 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4840 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4842 /* Abuse qc->result_tf for temp storage of intermediate TF
4843 * here to save some kernel stack usage.
4844 * For normal completion, qc->result_tf is not relevant. For
4845 * error, qc->result_tf is later overwritten by ata_qc_complete().
4846 * So, the correctness of qc->result_tf is not affected.
4848 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4849 ireason
= qc
->result_tf
.nsect
;
4850 bc_lo
= qc
->result_tf
.lbam
;
4851 bc_hi
= qc
->result_tf
.lbah
;
4852 bytes
= (bc_hi
<< 8) | bc_lo
;
4854 /* shall be cleared to zero, indicating xfer of data */
4855 if (ireason
& (1 << 0))
4858 /* make sure transfer direction matches expected */
4859 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4860 if (do_write
!= i_write
)
4863 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4865 __atapi_pio_bytes(qc
, bytes
);
4866 ata_altstatus(ap
); /* flush */
4871 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4872 qc
->err_mask
|= AC_ERR_HSM
;
4873 ap
->hsm_task_state
= HSM_ST_ERR
;
4877 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4878 * @ap: the target ata_port
4882 * 1 if ok in workqueue, 0 otherwise.
4885 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4887 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4890 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4891 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4892 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4895 if (is_atapi_taskfile(&qc
->tf
) &&
4896 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4904 * ata_hsm_qc_complete - finish a qc running on standard HSM
4905 * @qc: Command to complete
4906 * @in_wq: 1 if called from workqueue, 0 otherwise
4908 * Finish @qc which is running on standard HSM.
4911 * If @in_wq is zero, spin_lock_irqsave(host lock).
4912 * Otherwise, none on entry and grabs host lock.
4914 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4916 struct ata_port
*ap
= qc
->ap
;
4917 unsigned long flags
;
4919 if (ap
->ops
->error_handler
) {
4921 spin_lock_irqsave(ap
->lock
, flags
);
4923 /* EH might have kicked in while host lock is
4926 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4928 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4929 ap
->ops
->irq_on(ap
);
4930 ata_qc_complete(qc
);
4932 ata_port_freeze(ap
);
4935 spin_unlock_irqrestore(ap
->lock
, flags
);
4937 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4938 ata_qc_complete(qc
);
4940 ata_port_freeze(ap
);
4944 spin_lock_irqsave(ap
->lock
, flags
);
4945 ap
->ops
->irq_on(ap
);
4946 ata_qc_complete(qc
);
4947 spin_unlock_irqrestore(ap
->lock
, flags
);
4949 ata_qc_complete(qc
);
4954 * ata_hsm_move - move the HSM to the next state.
4955 * @ap: the target ata_port
4957 * @status: current device status
4958 * @in_wq: 1 if called from workqueue, 0 otherwise
4961 * 1 when poll next status needed, 0 otherwise.
4963 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4964 u8 status
, int in_wq
)
4966 unsigned long flags
= 0;
4969 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4971 /* Make sure ata_qc_issue_prot() does not throw things
4972 * like DMA polling into the workqueue. Notice that
4973 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4975 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4978 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4979 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4981 switch (ap
->hsm_task_state
) {
4983 /* Send first data block or PACKET CDB */
4985 /* If polling, we will stay in the work queue after
4986 * sending the data. Otherwise, interrupt handler
4987 * takes over after sending the data.
4989 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4991 /* check device status */
4992 if (unlikely((status
& ATA_DRQ
) == 0)) {
4993 /* handle BSY=0, DRQ=0 as error */
4994 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4995 /* device stops HSM for abort/error */
4996 qc
->err_mask
|= AC_ERR_DEV
;
4998 /* HSM violation. Let EH handle this */
4999 qc
->err_mask
|= AC_ERR_HSM
;
5001 ap
->hsm_task_state
= HSM_ST_ERR
;
5005 /* Device should not ask for data transfer (DRQ=1)
5006 * when it finds something wrong.
5007 * We ignore DRQ here and stop the HSM by
5008 * changing hsm_task_state to HSM_ST_ERR and
5009 * let the EH abort the command or reset the device.
5011 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5012 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5013 "error, dev_stat 0x%X\n", status
);
5014 qc
->err_mask
|= AC_ERR_HSM
;
5015 ap
->hsm_task_state
= HSM_ST_ERR
;
5019 /* Send the CDB (atapi) or the first data block (ata pio out).
5020 * During the state transition, interrupt handler shouldn't
5021 * be invoked before the data transfer is complete and
5022 * hsm_task_state is changed. Hence, the following locking.
5025 spin_lock_irqsave(ap
->lock
, flags
);
5027 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5028 /* PIO data out protocol.
5029 * send first data block.
5032 /* ata_pio_sectors() might change the state
5033 * to HSM_ST_LAST. so, the state is changed here
5034 * before ata_pio_sectors().
5036 ap
->hsm_task_state
= HSM_ST
;
5037 ata_pio_sectors(qc
);
5040 atapi_send_cdb(ap
, qc
);
5043 spin_unlock_irqrestore(ap
->lock
, flags
);
5045 /* if polling, ata_pio_task() handles the rest.
5046 * otherwise, interrupt handler takes over from here.
5051 /* complete command or read/write the data register */
5052 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5053 /* ATAPI PIO protocol */
5054 if ((status
& ATA_DRQ
) == 0) {
5055 /* No more data to transfer or device error.
5056 * Device error will be tagged in HSM_ST_LAST.
5058 ap
->hsm_task_state
= HSM_ST_LAST
;
5062 /* Device should not ask for data transfer (DRQ=1)
5063 * when it finds something wrong.
5064 * We ignore DRQ here and stop the HSM by
5065 * changing hsm_task_state to HSM_ST_ERR and
5066 * let the EH abort the command or reset the device.
5068 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5069 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5070 "device error, dev_stat 0x%X\n",
5072 qc
->err_mask
|= AC_ERR_HSM
;
5073 ap
->hsm_task_state
= HSM_ST_ERR
;
5077 atapi_pio_bytes(qc
);
5079 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5080 /* bad ireason reported by device */
5084 /* ATA PIO protocol */
5085 if (unlikely((status
& ATA_DRQ
) == 0)) {
5086 /* handle BSY=0, DRQ=0 as error */
5087 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5088 /* device stops HSM for abort/error */
5089 qc
->err_mask
|= AC_ERR_DEV
;
5091 /* HSM violation. Let EH handle this.
5092 * Phantom devices also trigger this
5093 * condition. Mark hint.
5095 qc
->err_mask
|= AC_ERR_HSM
|
5098 ap
->hsm_task_state
= HSM_ST_ERR
;
5102 /* For PIO reads, some devices may ask for
5103 * data transfer (DRQ=1) alone with ERR=1.
5104 * We respect DRQ here and transfer one
5105 * block of junk data before changing the
5106 * hsm_task_state to HSM_ST_ERR.
5108 * For PIO writes, ERR=1 DRQ=1 doesn't make
5109 * sense since the data block has been
5110 * transferred to the device.
5112 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5113 /* data might be corrputed */
5114 qc
->err_mask
|= AC_ERR_DEV
;
5116 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5117 ata_pio_sectors(qc
);
5118 status
= ata_wait_idle(ap
);
5121 if (status
& (ATA_BUSY
| ATA_DRQ
))
5122 qc
->err_mask
|= AC_ERR_HSM
;
5124 /* ata_pio_sectors() might change the
5125 * state to HSM_ST_LAST. so, the state
5126 * is changed after ata_pio_sectors().
5128 ap
->hsm_task_state
= HSM_ST_ERR
;
5132 ata_pio_sectors(qc
);
5134 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5135 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5137 status
= ata_wait_idle(ap
);
5146 if (unlikely(!ata_ok(status
))) {
5147 qc
->err_mask
|= __ac_err_mask(status
);
5148 ap
->hsm_task_state
= HSM_ST_ERR
;
5152 /* no more data to transfer */
5153 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5154 ap
->print_id
, qc
->dev
->devno
, status
);
5156 WARN_ON(qc
->err_mask
);
5158 ap
->hsm_task_state
= HSM_ST_IDLE
;
5160 /* complete taskfile transaction */
5161 ata_hsm_qc_complete(qc
, in_wq
);
5167 /* make sure qc->err_mask is available to
5168 * know what's wrong and recover
5170 WARN_ON(qc
->err_mask
== 0);
5172 ap
->hsm_task_state
= HSM_ST_IDLE
;
5174 /* complete taskfile transaction */
5175 ata_hsm_qc_complete(qc
, in_wq
);
5187 static void ata_pio_task(struct work_struct
*work
)
5189 struct ata_port
*ap
=
5190 container_of(work
, struct ata_port
, port_task
.work
);
5191 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5196 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5199 * This is purely heuristic. This is a fast path.
5200 * Sometimes when we enter, BSY will be cleared in
5201 * a chk-status or two. If not, the drive is probably seeking
5202 * or something. Snooze for a couple msecs, then
5203 * chk-status again. If still busy, queue delayed work.
5205 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5206 if (status
& ATA_BUSY
) {
5208 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5209 if (status
& ATA_BUSY
) {
5210 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5216 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5218 /* another command or interrupt handler
5219 * may be running at this point.
5226 * ata_qc_new - Request an available ATA command, for queueing
5227 * @ap: Port associated with device @dev
5228 * @dev: Device from whom we request an available command structure
5234 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5236 struct ata_queued_cmd
*qc
= NULL
;
5239 /* no command while frozen */
5240 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5243 /* the last tag is reserved for internal command. */
5244 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5245 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5246 qc
= __ata_qc_from_tag(ap
, i
);
5257 * ata_qc_new_init - Request an available ATA command, and initialize it
5258 * @dev: Device from whom we request an available command structure
5264 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5266 struct ata_port
*ap
= dev
->link
->ap
;
5267 struct ata_queued_cmd
*qc
;
5269 qc
= ata_qc_new(ap
);
5282 * ata_qc_free - free unused ata_queued_cmd
5283 * @qc: Command to complete
5285 * Designed to free unused ata_queued_cmd object
5286 * in case something prevents using it.
5289 * spin_lock_irqsave(host lock)
5291 void ata_qc_free(struct ata_queued_cmd
*qc
)
5293 struct ata_port
*ap
= qc
->ap
;
5296 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5300 if (likely(ata_tag_valid(tag
))) {
5301 qc
->tag
= ATA_TAG_POISON
;
5302 clear_bit(tag
, &ap
->qc_allocated
);
5306 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5308 struct ata_port
*ap
= qc
->ap
;
5309 struct ata_link
*link
= qc
->dev
->link
;
5311 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5312 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5314 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5317 /* command should be marked inactive atomically with qc completion */
5318 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
5319 link
->sactive
&= ~(1 << qc
->tag
);
5321 link
->active_tag
= ATA_TAG_POISON
;
5323 /* atapi: mark qc as inactive to prevent the interrupt handler
5324 * from completing the command twice later, before the error handler
5325 * is called. (when rc != 0 and atapi request sense is needed)
5327 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5328 ap
->qc_active
&= ~(1 << qc
->tag
);
5330 /* call completion callback */
5331 qc
->complete_fn(qc
);
5334 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5336 struct ata_port
*ap
= qc
->ap
;
5338 qc
->result_tf
.flags
= qc
->tf
.flags
;
5339 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5343 * ata_qc_complete - Complete an active ATA command
5344 * @qc: Command to complete
5345 * @err_mask: ATA Status register contents
5347 * Indicate to the mid and upper layers that an ATA
5348 * command has completed, with either an ok or not-ok status.
5351 * spin_lock_irqsave(host lock)
5353 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5355 struct ata_port
*ap
= qc
->ap
;
5357 /* XXX: New EH and old EH use different mechanisms to
5358 * synchronize EH with regular execution path.
5360 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5361 * Normal execution path is responsible for not accessing a
5362 * failed qc. libata core enforces the rule by returning NULL
5363 * from ata_qc_from_tag() for failed qcs.
5365 * Old EH depends on ata_qc_complete() nullifying completion
5366 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5367 * not synchronize with interrupt handler. Only PIO task is
5370 if (ap
->ops
->error_handler
) {
5371 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5373 if (unlikely(qc
->err_mask
))
5374 qc
->flags
|= ATA_QCFLAG_FAILED
;
5376 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5377 if (!ata_tag_internal(qc
->tag
)) {
5378 /* always fill result TF for failed qc */
5380 ata_qc_schedule_eh(qc
);
5385 /* read result TF if requested */
5386 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5389 __ata_qc_complete(qc
);
5391 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5394 /* read result TF if failed or requested */
5395 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5398 __ata_qc_complete(qc
);
5403 * ata_qc_complete_multiple - Complete multiple qcs successfully
5404 * @ap: port in question
5405 * @qc_active: new qc_active mask
5406 * @finish_qc: LLDD callback invoked before completing a qc
5408 * Complete in-flight commands. This functions is meant to be
5409 * called from low-level driver's interrupt routine to complete
5410 * requests normally. ap->qc_active and @qc_active is compared
5411 * and commands are completed accordingly.
5414 * spin_lock_irqsave(host lock)
5417 * Number of completed commands on success, -errno otherwise.
5419 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5420 void (*finish_qc
)(struct ata_queued_cmd
*))
5426 done_mask
= ap
->qc_active
^ qc_active
;
5428 if (unlikely(done_mask
& qc_active
)) {
5429 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5430 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5434 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5435 struct ata_queued_cmd
*qc
;
5437 if (!(done_mask
& (1 << i
)))
5440 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5443 ata_qc_complete(qc
);
5451 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5453 struct ata_port
*ap
= qc
->ap
;
5455 switch (qc
->tf
.protocol
) {
5458 case ATA_PROT_ATAPI_DMA
:
5461 case ATA_PROT_ATAPI
:
5463 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5476 * ata_qc_issue - issue taskfile to device
5477 * @qc: command to issue to device
5479 * Prepare an ATA command to submission to device.
5480 * This includes mapping the data into a DMA-able
5481 * area, filling in the S/G table, and finally
5482 * writing the taskfile to hardware, starting the command.
5485 * spin_lock_irqsave(host lock)
5487 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5489 struct ata_port
*ap
= qc
->ap
;
5490 struct ata_link
*link
= qc
->dev
->link
;
5492 /* Make sure only one non-NCQ command is outstanding. The
5493 * check is skipped for old EH because it reuses active qc to
5494 * request ATAPI sense.
5496 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5498 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5499 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5500 link
->sactive
|= 1 << qc
->tag
;
5502 WARN_ON(link
->sactive
);
5503 link
->active_tag
= qc
->tag
;
5506 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5507 ap
->qc_active
|= 1 << qc
->tag
;
5509 if (ata_should_dma_map(qc
)) {
5510 if (qc
->flags
& ATA_QCFLAG_SG
) {
5511 if (ata_sg_setup(qc
))
5513 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5514 if (ata_sg_setup_one(qc
))
5518 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5521 ap
->ops
->qc_prep(qc
);
5523 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5524 if (unlikely(qc
->err_mask
))
5529 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5530 qc
->err_mask
|= AC_ERR_SYSTEM
;
5532 ata_qc_complete(qc
);
5536 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5537 * @qc: command to issue to device
5539 * Using various libata functions and hooks, this function
5540 * starts an ATA command. ATA commands are grouped into
5541 * classes called "protocols", and issuing each type of protocol
5542 * is slightly different.
5544 * May be used as the qc_issue() entry in ata_port_operations.
5547 * spin_lock_irqsave(host lock)
5550 * Zero on success, AC_ERR_* mask on failure
5553 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5555 struct ata_port
*ap
= qc
->ap
;
5557 /* Use polling pio if the LLD doesn't handle
5558 * interrupt driven pio and atapi CDB interrupt.
5560 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5561 switch (qc
->tf
.protocol
) {
5563 case ATA_PROT_NODATA
:
5564 case ATA_PROT_ATAPI
:
5565 case ATA_PROT_ATAPI_NODATA
:
5566 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5568 case ATA_PROT_ATAPI_DMA
:
5569 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5570 /* see ata_dma_blacklisted() */
5578 /* select the device */
5579 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5581 /* start the command */
5582 switch (qc
->tf
.protocol
) {
5583 case ATA_PROT_NODATA
:
5584 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5585 ata_qc_set_polling(qc
);
5587 ata_tf_to_host(ap
, &qc
->tf
);
5588 ap
->hsm_task_state
= HSM_ST_LAST
;
5590 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5591 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5596 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5598 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5599 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5600 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5601 ap
->hsm_task_state
= HSM_ST_LAST
;
5605 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5606 ata_qc_set_polling(qc
);
5608 ata_tf_to_host(ap
, &qc
->tf
);
5610 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5611 /* PIO data out protocol */
5612 ap
->hsm_task_state
= HSM_ST_FIRST
;
5613 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5615 /* always send first data block using
5616 * the ata_pio_task() codepath.
5619 /* PIO data in protocol */
5620 ap
->hsm_task_state
= HSM_ST
;
5622 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5623 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5625 /* if polling, ata_pio_task() handles the rest.
5626 * otherwise, interrupt handler takes over from here.
5632 case ATA_PROT_ATAPI
:
5633 case ATA_PROT_ATAPI_NODATA
:
5634 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5635 ata_qc_set_polling(qc
);
5637 ata_tf_to_host(ap
, &qc
->tf
);
5639 ap
->hsm_task_state
= HSM_ST_FIRST
;
5641 /* send cdb by polling if no cdb interrupt */
5642 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5643 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5644 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5647 case ATA_PROT_ATAPI_DMA
:
5648 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5650 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5651 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5652 ap
->hsm_task_state
= HSM_ST_FIRST
;
5654 /* send cdb by polling if no cdb interrupt */
5655 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5656 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5661 return AC_ERR_SYSTEM
;
5668 * ata_host_intr - Handle host interrupt for given (port, task)
5669 * @ap: Port on which interrupt arrived (possibly...)
5670 * @qc: Taskfile currently active in engine
5672 * Handle host interrupt for given queued command. Currently,
5673 * only DMA interrupts are handled. All other commands are
5674 * handled via polling with interrupts disabled (nIEN bit).
5677 * spin_lock_irqsave(host lock)
5680 * One if interrupt was handled, zero if not (shared irq).
5683 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5684 struct ata_queued_cmd
*qc
)
5686 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5687 u8 status
, host_stat
= 0;
5689 VPRINTK("ata%u: protocol %d task_state %d\n",
5690 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5692 /* Check whether we are expecting interrupt in this state */
5693 switch (ap
->hsm_task_state
) {
5695 /* Some pre-ATAPI-4 devices assert INTRQ
5696 * at this state when ready to receive CDB.
5699 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5700 * The flag was turned on only for atapi devices.
5701 * No need to check is_atapi_taskfile(&qc->tf) again.
5703 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5707 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5708 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5709 /* check status of DMA engine */
5710 host_stat
= ap
->ops
->bmdma_status(ap
);
5711 VPRINTK("ata%u: host_stat 0x%X\n",
5712 ap
->print_id
, host_stat
);
5714 /* if it's not our irq... */
5715 if (!(host_stat
& ATA_DMA_INTR
))
5718 /* before we do anything else, clear DMA-Start bit */
5719 ap
->ops
->bmdma_stop(qc
);
5721 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5722 /* error when transfering data to/from memory */
5723 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5724 ap
->hsm_task_state
= HSM_ST_ERR
;
5734 /* check altstatus */
5735 status
= ata_altstatus(ap
);
5736 if (status
& ATA_BUSY
)
5739 /* check main status, clearing INTRQ */
5740 status
= ata_chk_status(ap
);
5741 if (unlikely(status
& ATA_BUSY
))
5744 /* ack bmdma irq events */
5745 ap
->ops
->irq_clear(ap
);
5747 ata_hsm_move(ap
, qc
, status
, 0);
5749 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5750 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5751 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5753 return 1; /* irq handled */
5756 ap
->stats
.idle_irq
++;
5759 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5761 ap
->ops
->irq_clear(ap
);
5762 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5766 return 0; /* irq not handled */
5770 * ata_interrupt - Default ATA host interrupt handler
5771 * @irq: irq line (unused)
5772 * @dev_instance: pointer to our ata_host information structure
5774 * Default interrupt handler for PCI IDE devices. Calls
5775 * ata_host_intr() for each port that is not disabled.
5778 * Obtains host lock during operation.
5781 * IRQ_NONE or IRQ_HANDLED.
5784 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5786 struct ata_host
*host
= dev_instance
;
5788 unsigned int handled
= 0;
5789 unsigned long flags
;
5791 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5792 spin_lock_irqsave(&host
->lock
, flags
);
5794 for (i
= 0; i
< host
->n_ports
; i
++) {
5795 struct ata_port
*ap
;
5797 ap
= host
->ports
[i
];
5799 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5800 struct ata_queued_cmd
*qc
;
5802 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
5803 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5804 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5805 handled
|= ata_host_intr(ap
, qc
);
5809 spin_unlock_irqrestore(&host
->lock
, flags
);
5811 return IRQ_RETVAL(handled
);
5815 * sata_scr_valid - test whether SCRs are accessible
5816 * @link: ATA link to test SCR accessibility for
5818 * Test whether SCRs are accessible for @link.
5824 * 1 if SCRs are accessible, 0 otherwise.
5826 int sata_scr_valid(struct ata_link
*link
)
5828 struct ata_port
*ap
= link
->ap
;
5830 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5834 * sata_scr_read - read SCR register of the specified port
5835 * @link: ATA link to read SCR for
5837 * @val: Place to store read value
5839 * Read SCR register @reg of @link into *@val. This function is
5840 * guaranteed to succeed if the cable type of the port is SATA
5841 * and the port implements ->scr_read.
5847 * 0 on success, negative errno on failure.
5849 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5851 struct ata_port
*ap
= link
->ap
;
5853 if (sata_scr_valid(link
))
5854 return ap
->ops
->scr_read(ap
, reg
, val
);
5859 * sata_scr_write - write SCR register of the specified port
5860 * @link: ATA link to write SCR for
5861 * @reg: SCR to write
5862 * @val: value to write
5864 * Write @val to SCR register @reg of @link. This function is
5865 * guaranteed to succeed if the cable type of the port is SATA
5866 * and the port implements ->scr_read.
5872 * 0 on success, negative errno on failure.
5874 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5876 struct ata_port
*ap
= link
->ap
;
5878 if (sata_scr_valid(link
))
5879 return ap
->ops
->scr_write(ap
, reg
, val
);
5884 * sata_scr_write_flush - write SCR register of the specified port and flush
5885 * @link: ATA link to write SCR for
5886 * @reg: SCR to write
5887 * @val: value to write
5889 * This function is identical to sata_scr_write() except that this
5890 * function performs flush after writing to the register.
5896 * 0 on success, negative errno on failure.
5898 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5900 struct ata_port
*ap
= link
->ap
;
5903 if (sata_scr_valid(link
)) {
5904 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
5906 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
5913 * ata_link_online - test whether the given link is online
5914 * @link: ATA link to test
5916 * Test whether @link is online. Note that this function returns
5917 * 0 if online status of @link cannot be obtained, so
5918 * ata_link_online(link) != !ata_link_offline(link).
5924 * 1 if the port online status is available and online.
5926 int ata_link_online(struct ata_link
*link
)
5930 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5931 (sstatus
& 0xf) == 0x3)
5937 * ata_link_offline - test whether the given link is offline
5938 * @link: ATA link to test
5940 * Test whether @link is offline. Note that this function
5941 * returns 0 if offline status of @link cannot be obtained, so
5942 * ata_link_online(link) != !ata_link_offline(link).
5948 * 1 if the port offline status is available and offline.
5950 int ata_link_offline(struct ata_link
*link
)
5954 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5955 (sstatus
& 0xf) != 0x3)
5960 int ata_flush_cache(struct ata_device
*dev
)
5962 unsigned int err_mask
;
5965 if (!ata_try_flush_cache(dev
))
5968 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5969 cmd
= ATA_CMD_FLUSH_EXT
;
5971 cmd
= ATA_CMD_FLUSH
;
5973 /* This is wrong. On a failed flush we get back the LBA of the lost
5974 sector and we should (assuming it wasn't aborted as unknown) issue
5975 a further flush command to continue the writeback until it
5977 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5979 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5987 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5988 unsigned int action
, unsigned int ehi_flags
,
5991 unsigned long flags
;
5994 for (i
= 0; i
< host
->n_ports
; i
++) {
5995 struct ata_port
*ap
= host
->ports
[i
];
5996 struct ata_link
*link
;
5998 /* Previous resume operation might still be in
5999 * progress. Wait for PM_PENDING to clear.
6001 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6002 ata_port_wait_eh(ap
);
6003 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6006 /* request PM ops to EH */
6007 spin_lock_irqsave(ap
->lock
, flags
);
6012 ap
->pm_result
= &rc
;
6015 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6016 __ata_port_for_each_link(link
, ap
) {
6017 link
->eh_info
.action
|= action
;
6018 link
->eh_info
.flags
|= ehi_flags
;
6021 ata_port_schedule_eh(ap
);
6023 spin_unlock_irqrestore(ap
->lock
, flags
);
6025 /* wait and check result */
6027 ata_port_wait_eh(ap
);
6028 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6038 * ata_host_suspend - suspend host
6039 * @host: host to suspend
6042 * Suspend @host. Actual operation is performed by EH. This
6043 * function requests EH to perform PM operations and waits for EH
6047 * Kernel thread context (may sleep).
6050 * 0 on success, -errno on failure.
6052 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6056 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6058 host
->dev
->power
.power_state
= mesg
;
6063 * ata_host_resume - resume host
6064 * @host: host to resume
6066 * Resume @host. Actual operation is performed by EH. This
6067 * function requests EH to perform PM operations and returns.
6068 * Note that all resume operations are performed parallely.
6071 * Kernel thread context (may sleep).
6073 void ata_host_resume(struct ata_host
*host
)
6075 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6076 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6077 host
->dev
->power
.power_state
= PMSG_ON
;
6082 * ata_port_start - Set port up for dma.
6083 * @ap: Port to initialize
6085 * Called just after data structures for each port are
6086 * initialized. Allocates space for PRD table.
6088 * May be used as the port_start() entry in ata_port_operations.
6091 * Inherited from caller.
6093 int ata_port_start(struct ata_port
*ap
)
6095 struct device
*dev
= ap
->dev
;
6098 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6103 rc
= ata_pad_alloc(ap
, dev
);
6107 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6108 (unsigned long long)ap
->prd_dma
);
6113 * ata_dev_init - Initialize an ata_device structure
6114 * @dev: Device structure to initialize
6116 * Initialize @dev in preparation for probing.
6119 * Inherited from caller.
6121 void ata_dev_init(struct ata_device
*dev
)
6123 struct ata_link
*link
= dev
->link
;
6124 struct ata_port
*ap
= link
->ap
;
6125 unsigned long flags
;
6127 /* SATA spd limit is bound to the first device */
6128 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6131 /* High bits of dev->flags are used to record warm plug
6132 * requests which occur asynchronously. Synchronize using
6135 spin_lock_irqsave(ap
->lock
, flags
);
6136 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6138 spin_unlock_irqrestore(ap
->lock
, flags
);
6140 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6141 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6142 dev
->pio_mask
= UINT_MAX
;
6143 dev
->mwdma_mask
= UINT_MAX
;
6144 dev
->udma_mask
= UINT_MAX
;
6148 * ata_link_init - Initialize an ata_link structure
6149 * @ap: ATA port link is attached to
6150 * @link: Link structure to initialize
6151 * @pmp: Port multiplier port number
6156 * Kernel thread context (may sleep)
6158 static void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6162 /* clear everything except for devices */
6163 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6167 link
->active_tag
= ATA_TAG_POISON
;
6168 link
->hw_sata_spd_limit
= UINT_MAX
;
6170 /* can't use iterator, ap isn't initialized yet */
6171 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6172 struct ata_device
*dev
= &link
->device
[i
];
6175 dev
->devno
= dev
- link
->device
;
6181 * sata_link_init_spd - Initialize link->sata_spd_limit
6182 * @link: Link to configure sata_spd_limit for
6184 * Initialize @link->[hw_]sata_spd_limit to the currently
6188 * Kernel thread context (may sleep).
6191 * 0 on success, -errno on failure.
6193 static int sata_link_init_spd(struct ata_link
*link
)
6198 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6202 spd
= (scontrol
>> 4) & 0xf;
6204 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6206 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6212 * ata_port_alloc - allocate and initialize basic ATA port resources
6213 * @host: ATA host this allocated port belongs to
6215 * Allocate and initialize basic ATA port resources.
6218 * Allocate ATA port on success, NULL on failure.
6221 * Inherited from calling layer (may sleep).
6223 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6225 struct ata_port
*ap
;
6229 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6233 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6234 ap
->lock
= &host
->lock
;
6235 ap
->flags
= ATA_FLAG_DISABLED
;
6237 ap
->ctl
= ATA_DEVCTL_OBS
;
6239 ap
->dev
= host
->dev
;
6240 ap
->last_ctl
= 0xFF;
6242 #if defined(ATA_VERBOSE_DEBUG)
6243 /* turn on all debugging levels */
6244 ap
->msg_enable
= 0x00FF;
6245 #elif defined(ATA_DEBUG)
6246 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6248 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6251 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6252 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6253 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6254 INIT_LIST_HEAD(&ap
->eh_done_q
);
6255 init_waitqueue_head(&ap
->eh_wait_q
);
6256 init_timer_deferrable(&ap
->fastdrain_timer
);
6257 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6258 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6260 ap
->cbl
= ATA_CBL_NONE
;
6262 ata_link_init(ap
, &ap
->link
, 0);
6265 ap
->stats
.unhandled_irq
= 1;
6266 ap
->stats
.idle_irq
= 1;
6271 static void ata_host_release(struct device
*gendev
, void *res
)
6273 struct ata_host
*host
= dev_get_drvdata(gendev
);
6276 for (i
= 0; i
< host
->n_ports
; i
++) {
6277 struct ata_port
*ap
= host
->ports
[i
];
6282 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6283 ap
->ops
->port_stop(ap
);
6286 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6287 host
->ops
->host_stop(host
);
6289 for (i
= 0; i
< host
->n_ports
; i
++) {
6290 struct ata_port
*ap
= host
->ports
[i
];
6296 scsi_host_put(ap
->scsi_host
);
6299 host
->ports
[i
] = NULL
;
6302 dev_set_drvdata(gendev
, NULL
);
6306 * ata_host_alloc - allocate and init basic ATA host resources
6307 * @dev: generic device this host is associated with
6308 * @max_ports: maximum number of ATA ports associated with this host
6310 * Allocate and initialize basic ATA host resources. LLD calls
6311 * this function to allocate a host, initializes it fully and
6312 * attaches it using ata_host_register().
6314 * @max_ports ports are allocated and host->n_ports is
6315 * initialized to @max_ports. The caller is allowed to decrease
6316 * host->n_ports before calling ata_host_register(). The unused
6317 * ports will be automatically freed on registration.
6320 * Allocate ATA host on success, NULL on failure.
6323 * Inherited from calling layer (may sleep).
6325 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6327 struct ata_host
*host
;
6333 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6336 /* alloc a container for our list of ATA ports (buses) */
6337 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6338 /* alloc a container for our list of ATA ports (buses) */
6339 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6343 devres_add(dev
, host
);
6344 dev_set_drvdata(dev
, host
);
6346 spin_lock_init(&host
->lock
);
6348 host
->n_ports
= max_ports
;
6350 /* allocate ports bound to this host */
6351 for (i
= 0; i
< max_ports
; i
++) {
6352 struct ata_port
*ap
;
6354 ap
= ata_port_alloc(host
);
6359 host
->ports
[i
] = ap
;
6362 devres_remove_group(dev
, NULL
);
6366 devres_release_group(dev
, NULL
);
6371 * ata_host_alloc_pinfo - alloc host and init with port_info array
6372 * @dev: generic device this host is associated with
6373 * @ppi: array of ATA port_info to initialize host with
6374 * @n_ports: number of ATA ports attached to this host
6376 * Allocate ATA host and initialize with info from @ppi. If NULL
6377 * terminated, @ppi may contain fewer entries than @n_ports. The
6378 * last entry will be used for the remaining ports.
6381 * Allocate ATA host on success, NULL on failure.
6384 * Inherited from calling layer (may sleep).
6386 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6387 const struct ata_port_info
* const * ppi
,
6390 const struct ata_port_info
*pi
;
6391 struct ata_host
*host
;
6394 host
= ata_host_alloc(dev
, n_ports
);
6398 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6399 struct ata_port
*ap
= host
->ports
[i
];
6404 ap
->pio_mask
= pi
->pio_mask
;
6405 ap
->mwdma_mask
= pi
->mwdma_mask
;
6406 ap
->udma_mask
= pi
->udma_mask
;
6407 ap
->flags
|= pi
->flags
;
6408 ap
->link
.flags
|= pi
->link_flags
;
6409 ap
->ops
= pi
->port_ops
;
6411 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6412 host
->ops
= pi
->port_ops
;
6413 if (!host
->private_data
&& pi
->private_data
)
6414 host
->private_data
= pi
->private_data
;
6421 * ata_host_start - start and freeze ports of an ATA host
6422 * @host: ATA host to start ports for
6424 * Start and then freeze ports of @host. Started status is
6425 * recorded in host->flags, so this function can be called
6426 * multiple times. Ports are guaranteed to get started only
6427 * once. If host->ops isn't initialized yet, its set to the
6428 * first non-dummy port ops.
6431 * Inherited from calling layer (may sleep).
6434 * 0 if all ports are started successfully, -errno otherwise.
6436 int ata_host_start(struct ata_host
*host
)
6440 if (host
->flags
& ATA_HOST_STARTED
)
6443 for (i
= 0; i
< host
->n_ports
; i
++) {
6444 struct ata_port
*ap
= host
->ports
[i
];
6446 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6447 host
->ops
= ap
->ops
;
6449 if (ap
->ops
->port_start
) {
6450 rc
= ap
->ops
->port_start(ap
);
6452 ata_port_printk(ap
, KERN_ERR
, "failed to "
6453 "start port (errno=%d)\n", rc
);
6458 ata_eh_freeze_port(ap
);
6461 host
->flags
|= ATA_HOST_STARTED
;
6466 struct ata_port
*ap
= host
->ports
[i
];
6468 if (ap
->ops
->port_stop
)
6469 ap
->ops
->port_stop(ap
);
6475 * ata_sas_host_init - Initialize a host struct
6476 * @host: host to initialize
6477 * @dev: device host is attached to
6478 * @flags: host flags
6482 * PCI/etc. bus probe sem.
6485 /* KILLME - the only user left is ipr */
6486 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6487 unsigned long flags
, const struct ata_port_operations
*ops
)
6489 spin_lock_init(&host
->lock
);
6491 host
->flags
= flags
;
6496 * ata_host_register - register initialized ATA host
6497 * @host: ATA host to register
6498 * @sht: template for SCSI host
6500 * Register initialized ATA host. @host is allocated using
6501 * ata_host_alloc() and fully initialized by LLD. This function
6502 * starts ports, registers @host with ATA and SCSI layers and
6503 * probe registered devices.
6506 * Inherited from calling layer (may sleep).
6509 * 0 on success, -errno otherwise.
6511 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6515 /* host must have been started */
6516 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6517 dev_printk(KERN_ERR
, host
->dev
,
6518 "BUG: trying to register unstarted host\n");
6523 /* Blow away unused ports. This happens when LLD can't
6524 * determine the exact number of ports to allocate at
6527 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6528 kfree(host
->ports
[i
]);
6530 /* give ports names and add SCSI hosts */
6531 for (i
= 0; i
< host
->n_ports
; i
++)
6532 host
->ports
[i
]->print_id
= ata_print_id
++;
6534 rc
= ata_scsi_add_hosts(host
, sht
);
6538 /* associate with ACPI nodes */
6539 ata_acpi_associate(host
);
6541 /* set cable, sata_spd_limit and report */
6542 for (i
= 0; i
< host
->n_ports
; i
++) {
6543 struct ata_port
*ap
= host
->ports
[i
];
6544 unsigned long xfer_mask
;
6546 /* set SATA cable type if still unset */
6547 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6548 ap
->cbl
= ATA_CBL_SATA
;
6550 /* init sata_spd_limit to the current value */
6551 sata_link_init_spd(&ap
->link
);
6553 /* print per-port info to dmesg */
6554 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6557 if (!ata_port_is_dummy(ap
))
6558 ata_port_printk(ap
, KERN_INFO
,
6559 "%cATA max %s %s\n",
6560 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6561 ata_mode_string(xfer_mask
),
6562 ap
->link
.eh_info
.desc
);
6564 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6567 /* perform each probe synchronously */
6568 DPRINTK("probe begin\n");
6569 for (i
= 0; i
< host
->n_ports
; i
++) {
6570 struct ata_port
*ap
= host
->ports
[i
];
6574 if (ap
->ops
->error_handler
) {
6575 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6576 unsigned long flags
;
6580 /* kick EH for boot probing */
6581 spin_lock_irqsave(ap
->lock
, flags
);
6584 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6585 ehi
->action
|= ATA_EH_SOFTRESET
;
6586 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6588 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6589 ap
->pflags
|= ATA_PFLAG_LOADING
;
6590 ata_port_schedule_eh(ap
);
6592 spin_unlock_irqrestore(ap
->lock
, flags
);
6594 /* wait for EH to finish */
6595 ata_port_wait_eh(ap
);
6597 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6598 rc
= ata_bus_probe(ap
);
6599 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6602 /* FIXME: do something useful here?
6603 * Current libata behavior will
6604 * tear down everything when
6605 * the module is removed
6606 * or the h/w is unplugged.
6612 /* probes are done, now scan each port's disk(s) */
6613 DPRINTK("host probe begin\n");
6614 for (i
= 0; i
< host
->n_ports
; i
++) {
6615 struct ata_port
*ap
= host
->ports
[i
];
6617 ata_scsi_scan_host(ap
, 1);
6624 * ata_host_activate - start host, request IRQ and register it
6625 * @host: target ATA host
6626 * @irq: IRQ to request
6627 * @irq_handler: irq_handler used when requesting IRQ
6628 * @irq_flags: irq_flags used when requesting IRQ
6629 * @sht: scsi_host_template to use when registering the host
6631 * After allocating an ATA host and initializing it, most libata
6632 * LLDs perform three steps to activate the host - start host,
6633 * request IRQ and register it. This helper takes necessasry
6634 * arguments and performs the three steps in one go.
6637 * Inherited from calling layer (may sleep).
6640 * 0 on success, -errno otherwise.
6642 int ata_host_activate(struct ata_host
*host
, int irq
,
6643 irq_handler_t irq_handler
, unsigned long irq_flags
,
6644 struct scsi_host_template
*sht
)
6648 rc
= ata_host_start(host
);
6652 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6653 dev_driver_string(host
->dev
), host
);
6657 for (i
= 0; i
< host
->n_ports
; i
++)
6658 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6660 rc
= ata_host_register(host
, sht
);
6661 /* if failed, just free the IRQ and leave ports alone */
6663 devm_free_irq(host
->dev
, irq
, host
);
6669 * ata_port_detach - Detach ATA port in prepration of device removal
6670 * @ap: ATA port to be detached
6672 * Detach all ATA devices and the associated SCSI devices of @ap;
6673 * then, remove the associated SCSI host. @ap is guaranteed to
6674 * be quiescent on return from this function.
6677 * Kernel thread context (may sleep).
6679 void ata_port_detach(struct ata_port
*ap
)
6681 unsigned long flags
;
6682 struct ata_link
*link
;
6683 struct ata_device
*dev
;
6685 if (!ap
->ops
->error_handler
)
6688 /* tell EH we're leaving & flush EH */
6689 spin_lock_irqsave(ap
->lock
, flags
);
6690 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6691 spin_unlock_irqrestore(ap
->lock
, flags
);
6693 ata_port_wait_eh(ap
);
6695 /* EH is now guaranteed to see UNLOADING, so no new device
6696 * will be attached. Disable all existing devices.
6698 spin_lock_irqsave(ap
->lock
, flags
);
6700 ata_port_for_each_link(link
, ap
) {
6701 ata_link_for_each_dev(dev
, link
)
6702 ata_dev_disable(dev
);
6705 spin_unlock_irqrestore(ap
->lock
, flags
);
6707 /* Final freeze & EH. All in-flight commands are aborted. EH
6708 * will be skipped and retrials will be terminated with bad
6711 spin_lock_irqsave(ap
->lock
, flags
);
6712 ata_port_freeze(ap
); /* won't be thawed */
6713 spin_unlock_irqrestore(ap
->lock
, flags
);
6715 ata_port_wait_eh(ap
);
6716 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6719 /* remove the associated SCSI host */
6720 scsi_remove_host(ap
->scsi_host
);
6724 * ata_host_detach - Detach all ports of an ATA host
6725 * @host: Host to detach
6727 * Detach all ports of @host.
6730 * Kernel thread context (may sleep).
6732 void ata_host_detach(struct ata_host
*host
)
6736 for (i
= 0; i
< host
->n_ports
; i
++)
6737 ata_port_detach(host
->ports
[i
]);
6741 * ata_std_ports - initialize ioaddr with standard port offsets.
6742 * @ioaddr: IO address structure to be initialized
6744 * Utility function which initializes data_addr, error_addr,
6745 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6746 * device_addr, status_addr, and command_addr to standard offsets
6747 * relative to cmd_addr.
6749 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6752 void ata_std_ports(struct ata_ioports
*ioaddr
)
6754 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6755 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6756 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6757 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6758 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6759 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6760 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6761 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6762 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6763 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6770 * ata_pci_remove_one - PCI layer callback for device removal
6771 * @pdev: PCI device that was removed
6773 * PCI layer indicates to libata via this hook that hot-unplug or
6774 * module unload event has occurred. Detach all ports. Resource
6775 * release is handled via devres.
6778 * Inherited from PCI layer (may sleep).
6780 void ata_pci_remove_one(struct pci_dev
*pdev
)
6782 struct device
*dev
= pci_dev_to_dev(pdev
);
6783 struct ata_host
*host
= dev_get_drvdata(dev
);
6785 ata_host_detach(host
);
6788 /* move to PCI subsystem */
6789 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6791 unsigned long tmp
= 0;
6793 switch (bits
->width
) {
6796 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6802 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6808 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6819 return (tmp
== bits
->val
) ? 1 : 0;
6823 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6825 pci_save_state(pdev
);
6826 pci_disable_device(pdev
);
6828 if (mesg
.event
== PM_EVENT_SUSPEND
)
6829 pci_set_power_state(pdev
, PCI_D3hot
);
6832 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6836 pci_set_power_state(pdev
, PCI_D0
);
6837 pci_restore_state(pdev
);
6839 rc
= pcim_enable_device(pdev
);
6841 dev_printk(KERN_ERR
, &pdev
->dev
,
6842 "failed to enable device after resume (%d)\n", rc
);
6846 pci_set_master(pdev
);
6850 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6852 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6855 rc
= ata_host_suspend(host
, mesg
);
6859 ata_pci_device_do_suspend(pdev
, mesg
);
6864 int ata_pci_device_resume(struct pci_dev
*pdev
)
6866 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6869 rc
= ata_pci_device_do_resume(pdev
);
6871 ata_host_resume(host
);
6874 #endif /* CONFIG_PM */
6876 #endif /* CONFIG_PCI */
6879 static int __init
ata_init(void)
6881 ata_probe_timeout
*= HZ
;
6882 ata_wq
= create_workqueue("ata");
6886 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6888 destroy_workqueue(ata_wq
);
6892 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6896 static void __exit
ata_exit(void)
6898 destroy_workqueue(ata_wq
);
6899 destroy_workqueue(ata_aux_wq
);
6902 subsys_initcall(ata_init
);
6903 module_exit(ata_exit
);
6905 static unsigned long ratelimit_time
;
6906 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6908 int ata_ratelimit(void)
6911 unsigned long flags
;
6913 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6915 if (time_after(jiffies
, ratelimit_time
)) {
6917 ratelimit_time
= jiffies
+ (HZ
/5);
6921 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6927 * ata_wait_register - wait until register value changes
6928 * @reg: IO-mapped register
6929 * @mask: Mask to apply to read register value
6930 * @val: Wait condition
6931 * @interval_msec: polling interval in milliseconds
6932 * @timeout_msec: timeout in milliseconds
6934 * Waiting for some bits of register to change is a common
6935 * operation for ATA controllers. This function reads 32bit LE
6936 * IO-mapped register @reg and tests for the following condition.
6938 * (*@reg & mask) != val
6940 * If the condition is met, it returns; otherwise, the process is
6941 * repeated after @interval_msec until timeout.
6944 * Kernel thread context (may sleep)
6947 * The final register value.
6949 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6950 unsigned long interval_msec
,
6951 unsigned long timeout_msec
)
6953 unsigned long timeout
;
6956 tmp
= ioread32(reg
);
6958 /* Calculate timeout _after_ the first read to make sure
6959 * preceding writes reach the controller before starting to
6960 * eat away the timeout.
6962 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6964 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6965 msleep(interval_msec
);
6966 tmp
= ioread32(reg
);
6975 static void ata_dummy_noret(struct ata_port
*ap
) { }
6976 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6977 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6979 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6984 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6986 return AC_ERR_SYSTEM
;
6989 const struct ata_port_operations ata_dummy_port_ops
= {
6990 .check_status
= ata_dummy_check_status
,
6991 .check_altstatus
= ata_dummy_check_status
,
6992 .dev_select
= ata_noop_dev_select
,
6993 .qc_prep
= ata_noop_qc_prep
,
6994 .qc_issue
= ata_dummy_qc_issue
,
6995 .freeze
= ata_dummy_noret
,
6996 .thaw
= ata_dummy_noret
,
6997 .error_handler
= ata_dummy_noret
,
6998 .post_internal_cmd
= ata_dummy_qc_noret
,
6999 .irq_clear
= ata_dummy_noret
,
7000 .port_start
= ata_dummy_ret0
,
7001 .port_stop
= ata_dummy_noret
,
7004 const struct ata_port_info ata_dummy_port_info
= {
7005 .port_ops
= &ata_dummy_port_ops
,
7009 * libata is essentially a library of internal helper functions for
7010 * low-level ATA host controller drivers. As such, the API/ABI is
7011 * likely to change as new drivers are added and updated.
7012 * Do not depend on ABI/API stability.
7015 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7016 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7017 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7018 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7019 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7020 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7021 EXPORT_SYMBOL_GPL(ata_std_ports
);
7022 EXPORT_SYMBOL_GPL(ata_host_init
);
7023 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7024 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7025 EXPORT_SYMBOL_GPL(ata_host_start
);
7026 EXPORT_SYMBOL_GPL(ata_host_register
);
7027 EXPORT_SYMBOL_GPL(ata_host_activate
);
7028 EXPORT_SYMBOL_GPL(ata_host_detach
);
7029 EXPORT_SYMBOL_GPL(ata_sg_init
);
7030 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7031 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7032 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7033 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7034 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7035 EXPORT_SYMBOL_GPL(ata_tf_load
);
7036 EXPORT_SYMBOL_GPL(ata_tf_read
);
7037 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7038 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7039 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7040 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7041 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7042 EXPORT_SYMBOL_GPL(ata_check_status
);
7043 EXPORT_SYMBOL_GPL(ata_altstatus
);
7044 EXPORT_SYMBOL_GPL(ata_exec_command
);
7045 EXPORT_SYMBOL_GPL(ata_port_start
);
7046 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7047 EXPORT_SYMBOL_GPL(ata_interrupt
);
7048 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7049 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7050 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7051 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7052 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7053 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7054 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7055 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7056 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7057 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7058 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7059 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7060 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7061 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7062 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7063 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7064 EXPORT_SYMBOL_GPL(ata_port_probe
);
7065 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7066 EXPORT_SYMBOL_GPL(sata_set_spd
);
7067 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7068 EXPORT_SYMBOL_GPL(sata_link_resume
);
7069 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7070 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7071 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7072 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7073 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7074 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7075 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7076 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7077 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7078 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7079 EXPORT_SYMBOL_GPL(ata_port_disable
);
7080 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7081 EXPORT_SYMBOL_GPL(ata_wait_register
);
7082 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7083 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7084 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7085 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7086 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7087 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7088 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7089 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7090 EXPORT_SYMBOL_GPL(ata_host_intr
);
7091 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7092 EXPORT_SYMBOL_GPL(sata_scr_read
);
7093 EXPORT_SYMBOL_GPL(sata_scr_write
);
7094 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7095 EXPORT_SYMBOL_GPL(ata_link_online
);
7096 EXPORT_SYMBOL_GPL(ata_link_offline
);
7098 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7099 EXPORT_SYMBOL_GPL(ata_host_resume
);
7100 #endif /* CONFIG_PM */
7101 EXPORT_SYMBOL_GPL(ata_id_string
);
7102 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7103 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7104 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7106 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7107 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7108 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7111 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7112 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7113 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7114 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7115 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7116 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7118 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7119 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7120 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7121 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7122 #endif /* CONFIG_PM */
7123 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7124 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7125 #endif /* CONFIG_PCI */
7127 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7128 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7129 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7130 EXPORT_SYMBOL_GPL(ata_port_desc
);
7132 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7133 #endif /* CONFIG_PCI */
7134 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7135 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7136 EXPORT_SYMBOL_GPL(ata_link_abort
);
7137 EXPORT_SYMBOL_GPL(ata_port_abort
);
7138 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7139 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7140 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7141 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7142 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7143 EXPORT_SYMBOL_GPL(ata_do_eh
);
7144 EXPORT_SYMBOL_GPL(ata_irq_on
);
7145 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7147 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7148 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7149 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7150 EXPORT_SYMBOL_GPL(ata_cable_sata
);