2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
52 #include <scsi/scsi.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_host.h>
55 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
62 #define DRV_VERSION "2.21" /* must be exactly four chars */
65 /* debounce timing parameters in msecs { interval, duration, timeout } */
66 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
67 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
68 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
70 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
71 u16 heads
, u16 sectors
);
72 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
74 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
76 unsigned int ata_print_id
= 1;
77 static struct workqueue_struct
*ata_wq
;
79 struct workqueue_struct
*ata_aux_wq
;
81 int atapi_enabled
= 1;
82 module_param(atapi_enabled
, int, 0444);
83 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
86 module_param(atapi_dmadir
, int, 0444);
87 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 int atapi_passthru16
= 1;
90 module_param(atapi_passthru16
, int, 0444);
91 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
94 module_param_named(fua
, libata_fua
, int, 0444);
95 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
97 static int ata_ignore_hpa
= 0;
98 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
99 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
101 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
102 module_param(ata_probe_timeout
, int, 0444);
103 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
105 int libata_noacpi
= 1;
106 module_param_named(noacpi
, libata_noacpi
, int, 0444);
107 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
109 MODULE_AUTHOR("Jeff Garzik");
110 MODULE_DESCRIPTION("Library module for ATA devices");
111 MODULE_LICENSE("GPL");
112 MODULE_VERSION(DRV_VERSION
);
116 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
117 * @tf: Taskfile to convert
118 * @pmp: Port multiplier port
119 * @is_cmd: This FIS is for command
120 * @fis: Buffer into which data will output
122 * Converts a standard ATA taskfile to a Serial ATA
123 * FIS structure (Register - Host to Device).
126 * Inherited from caller.
128 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
130 fis
[0] = 0x27; /* Register - Host to Device FIS */
131 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
133 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
135 fis
[2] = tf
->command
;
136 fis
[3] = tf
->feature
;
143 fis
[8] = tf
->hob_lbal
;
144 fis
[9] = tf
->hob_lbam
;
145 fis
[10] = tf
->hob_lbah
;
146 fis
[11] = tf
->hob_feature
;
149 fis
[13] = tf
->hob_nsect
;
160 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
161 * @fis: Buffer from which data will be input
162 * @tf: Taskfile to output
164 * Converts a serial ATA FIS structure to a standard ATA taskfile.
167 * Inherited from caller.
170 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
172 tf
->command
= fis
[2]; /* status */
173 tf
->feature
= fis
[3]; /* error */
180 tf
->hob_lbal
= fis
[8];
181 tf
->hob_lbam
= fis
[9];
182 tf
->hob_lbah
= fis
[10];
185 tf
->hob_nsect
= fis
[13];
188 static const u8 ata_rw_cmds
[] = {
192 ATA_CMD_READ_MULTI_EXT
,
193 ATA_CMD_WRITE_MULTI_EXT
,
197 ATA_CMD_WRITE_MULTI_FUA_EXT
,
201 ATA_CMD_PIO_READ_EXT
,
202 ATA_CMD_PIO_WRITE_EXT
,
215 ATA_CMD_WRITE_FUA_EXT
219 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
220 * @tf: command to examine and configure
221 * @dev: device tf belongs to
223 * Examine the device configuration and tf->flags to calculate
224 * the proper read/write commands and protocol to use.
229 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
233 int index
, fua
, lba48
, write
;
235 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
236 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
237 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
239 if (dev
->flags
& ATA_DFLAG_PIO
) {
240 tf
->protocol
= ATA_PROT_PIO
;
241 index
= dev
->multi_count
? 0 : 8;
242 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
243 /* Unable to use DMA due to host limitation */
244 tf
->protocol
= ATA_PROT_PIO
;
245 index
= dev
->multi_count
? 0 : 8;
247 tf
->protocol
= ATA_PROT_DMA
;
251 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
260 * ata_tf_read_block - Read block address from ATA taskfile
261 * @tf: ATA taskfile of interest
262 * @dev: ATA device @tf belongs to
267 * Read block address from @tf. This function can handle all
268 * three address formats - LBA, LBA48 and CHS. tf->protocol and
269 * flags select the address format to use.
272 * Block address read from @tf.
274 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
278 if (tf
->flags
& ATA_TFLAG_LBA
) {
279 if (tf
->flags
& ATA_TFLAG_LBA48
) {
280 block
|= (u64
)tf
->hob_lbah
<< 40;
281 block
|= (u64
)tf
->hob_lbam
<< 32;
282 block
|= tf
->hob_lbal
<< 24;
284 block
|= (tf
->device
& 0xf) << 24;
286 block
|= tf
->lbah
<< 16;
287 block
|= tf
->lbam
<< 8;
292 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
293 head
= tf
->device
& 0xf;
296 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
303 * ata_build_rw_tf - Build ATA taskfile for given read/write request
304 * @tf: Target ATA taskfile
305 * @dev: ATA device @tf belongs to
306 * @block: Block address
307 * @n_block: Number of blocks
308 * @tf_flags: RW/FUA etc...
314 * Build ATA taskfile @tf for read/write request described by
315 * @block, @n_block, @tf_flags and @tag on @dev.
319 * 0 on success, -ERANGE if the request is too large for @dev,
320 * -EINVAL if the request is invalid.
322 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
323 u64 block
, u32 n_block
, unsigned int tf_flags
,
326 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
327 tf
->flags
|= tf_flags
;
329 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
331 if (!lba_48_ok(block
, n_block
))
334 tf
->protocol
= ATA_PROT_NCQ
;
335 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
337 if (tf
->flags
& ATA_TFLAG_WRITE
)
338 tf
->command
= ATA_CMD_FPDMA_WRITE
;
340 tf
->command
= ATA_CMD_FPDMA_READ
;
342 tf
->nsect
= tag
<< 3;
343 tf
->hob_feature
= (n_block
>> 8) & 0xff;
344 tf
->feature
= n_block
& 0xff;
346 tf
->hob_lbah
= (block
>> 40) & 0xff;
347 tf
->hob_lbam
= (block
>> 32) & 0xff;
348 tf
->hob_lbal
= (block
>> 24) & 0xff;
349 tf
->lbah
= (block
>> 16) & 0xff;
350 tf
->lbam
= (block
>> 8) & 0xff;
351 tf
->lbal
= block
& 0xff;
354 if (tf
->flags
& ATA_TFLAG_FUA
)
355 tf
->device
|= 1 << 7;
356 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
357 tf
->flags
|= ATA_TFLAG_LBA
;
359 if (lba_28_ok(block
, n_block
)) {
361 tf
->device
|= (block
>> 24) & 0xf;
362 } else if (lba_48_ok(block
, n_block
)) {
363 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
367 tf
->flags
|= ATA_TFLAG_LBA48
;
369 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
371 tf
->hob_lbah
= (block
>> 40) & 0xff;
372 tf
->hob_lbam
= (block
>> 32) & 0xff;
373 tf
->hob_lbal
= (block
>> 24) & 0xff;
375 /* request too large even for LBA48 */
378 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
381 tf
->nsect
= n_block
& 0xff;
383 tf
->lbah
= (block
>> 16) & 0xff;
384 tf
->lbam
= (block
>> 8) & 0xff;
385 tf
->lbal
= block
& 0xff;
387 tf
->device
|= ATA_LBA
;
390 u32 sect
, head
, cyl
, track
;
392 /* The request -may- be too large for CHS addressing. */
393 if (!lba_28_ok(block
, n_block
))
396 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
399 /* Convert LBA to CHS */
400 track
= (u32
)block
/ dev
->sectors
;
401 cyl
= track
/ dev
->heads
;
402 head
= track
% dev
->heads
;
403 sect
= (u32
)block
% dev
->sectors
+ 1;
405 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
406 (u32
)block
, track
, cyl
, head
, sect
);
408 /* Check whether the converted CHS can fit.
412 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
415 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
426 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
427 * @pio_mask: pio_mask
428 * @mwdma_mask: mwdma_mask
429 * @udma_mask: udma_mask
431 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
432 * unsigned int xfer_mask.
440 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
441 unsigned int mwdma_mask
,
442 unsigned int udma_mask
)
444 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
445 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
446 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
450 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
451 * @xfer_mask: xfer_mask to unpack
452 * @pio_mask: resulting pio_mask
453 * @mwdma_mask: resulting mwdma_mask
454 * @udma_mask: resulting udma_mask
456 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
457 * Any NULL distination masks will be ignored.
459 static void ata_unpack_xfermask(unsigned int xfer_mask
,
460 unsigned int *pio_mask
,
461 unsigned int *mwdma_mask
,
462 unsigned int *udma_mask
)
465 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
467 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
469 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
472 static const struct ata_xfer_ent
{
476 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
477 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
478 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
483 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
484 * @xfer_mask: xfer_mask of interest
486 * Return matching XFER_* value for @xfer_mask. Only the highest
487 * bit of @xfer_mask is considered.
493 * Matching XFER_* value, 0 if no match found.
495 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
497 int highbit
= fls(xfer_mask
) - 1;
498 const struct ata_xfer_ent
*ent
;
500 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
501 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
502 return ent
->base
+ highbit
- ent
->shift
;
507 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
508 * @xfer_mode: XFER_* of interest
510 * Return matching xfer_mask for @xfer_mode.
516 * Matching xfer_mask, 0 if no match found.
518 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
520 const struct ata_xfer_ent
*ent
;
522 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
523 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
524 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
529 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
530 * @xfer_mode: XFER_* of interest
532 * Return matching xfer_shift for @xfer_mode.
538 * Matching xfer_shift, -1 if no match found.
540 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
542 const struct ata_xfer_ent
*ent
;
544 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
545 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
551 * ata_mode_string - convert xfer_mask to string
552 * @xfer_mask: mask of bits supported; only highest bit counts.
554 * Determine string which represents the highest speed
555 * (highest bit in @modemask).
561 * Constant C string representing highest speed listed in
562 * @mode_mask, or the constant C string "<n/a>".
564 static const char *ata_mode_string(unsigned int xfer_mask
)
566 static const char * const xfer_mode_str
[] = {
590 highbit
= fls(xfer_mask
) - 1;
591 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
592 return xfer_mode_str
[highbit
];
596 static const char *sata_spd_string(unsigned int spd
)
598 static const char * const spd_str
[] = {
603 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
605 return spd_str
[spd
- 1];
608 void ata_dev_disable(struct ata_device
*dev
)
610 if (ata_dev_enabled(dev
)) {
611 if (ata_msg_drv(dev
->link
->ap
))
612 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
613 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
620 * ata_devchk - PATA device presence detection
621 * @ap: ATA channel to examine
622 * @device: Device to examine (starting at zero)
624 * This technique was originally described in
625 * Hale Landis's ATADRVR (www.ata-atapi.com), and
626 * later found its way into the ATA/ATAPI spec.
628 * Write a pattern to the ATA shadow registers,
629 * and if a device is present, it will respond by
630 * correctly storing and echoing back the
631 * ATA shadow register contents.
637 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
639 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
642 ap
->ops
->dev_select(ap
, device
);
644 iowrite8(0x55, ioaddr
->nsect_addr
);
645 iowrite8(0xaa, ioaddr
->lbal_addr
);
647 iowrite8(0xaa, ioaddr
->nsect_addr
);
648 iowrite8(0x55, ioaddr
->lbal_addr
);
650 iowrite8(0x55, ioaddr
->nsect_addr
);
651 iowrite8(0xaa, ioaddr
->lbal_addr
);
653 nsect
= ioread8(ioaddr
->nsect_addr
);
654 lbal
= ioread8(ioaddr
->lbal_addr
);
656 if ((nsect
== 0x55) && (lbal
== 0xaa))
657 return 1; /* we found a device */
659 return 0; /* nothing found */
663 * ata_dev_classify - determine device type based on ATA-spec signature
664 * @tf: ATA taskfile register set for device to be identified
666 * Determine from taskfile register contents whether a device is
667 * ATA or ATAPI, as per "Signature and persistence" section
668 * of ATA/PI spec (volume 1, sect 5.14).
674 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
675 * the event of failure.
678 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
680 /* Apple's open source Darwin code hints that some devices only
681 * put a proper signature into the LBA mid/high registers,
682 * So, we only check those. It's sufficient for uniqueness.
685 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
686 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
687 DPRINTK("found ATA device by sig\n");
691 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
692 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
693 DPRINTK("found ATAPI device by sig\n");
694 return ATA_DEV_ATAPI
;
697 DPRINTK("unknown device\n");
698 return ATA_DEV_UNKNOWN
;
702 * ata_dev_try_classify - Parse returned ATA device signature
703 * @ap: ATA channel to examine
704 * @device: Device to examine (starting at zero)
705 * @r_err: Value of error register on completion
707 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
708 * an ATA/ATAPI-defined set of values is placed in the ATA
709 * shadow registers, indicating the results of device detection
712 * Select the ATA device, and read the values from the ATA shadow
713 * registers. Then parse according to the Error register value,
714 * and the spec-defined values examined by ata_dev_classify().
720 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
724 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
726 struct ata_taskfile tf
;
730 ap
->ops
->dev_select(ap
, device
);
732 memset(&tf
, 0, sizeof(tf
));
734 ap
->ops
->tf_read(ap
, &tf
);
739 /* see if device passed diags: if master then continue and warn later */
740 if (err
== 0 && device
== 0)
741 /* diagnostic fail : do nothing _YET_ */
742 ap
->link
.device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
745 else if ((device
== 0) && (err
== 0x81))
750 /* determine if device is ATA or ATAPI */
751 class = ata_dev_classify(&tf
);
753 if (class == ATA_DEV_UNKNOWN
)
755 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
761 * ata_id_string - Convert IDENTIFY DEVICE page into string
762 * @id: IDENTIFY DEVICE results we will examine
763 * @s: string into which data is output
764 * @ofs: offset into identify device page
765 * @len: length of string to return. must be an even number.
767 * The strings in the IDENTIFY DEVICE page are broken up into
768 * 16-bit chunks. Run through the string, and output each
769 * 8-bit chunk linearly, regardless of platform.
775 void ata_id_string(const u16
*id
, unsigned char *s
,
776 unsigned int ofs
, unsigned int len
)
795 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
796 * @id: IDENTIFY DEVICE results we will examine
797 * @s: string into which data is output
798 * @ofs: offset into identify device page
799 * @len: length of string to return. must be an odd number.
801 * This function is identical to ata_id_string except that it
802 * trims trailing spaces and terminates the resulting string with
803 * null. @len must be actual maximum length (even number) + 1.
808 void ata_id_c_string(const u16
*id
, unsigned char *s
,
809 unsigned int ofs
, unsigned int len
)
815 ata_id_string(id
, s
, ofs
, len
- 1);
817 p
= s
+ strnlen(s
, len
- 1);
818 while (p
> s
&& p
[-1] == ' ')
823 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
827 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
828 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
829 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
830 sectors
|= (tf
->lbah
& 0xff) << 16;
831 sectors
|= (tf
->lbam
& 0xff) << 8;
832 sectors
|= (tf
->lbal
& 0xff);
837 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
841 sectors
|= (tf
->device
& 0x0f) << 24;
842 sectors
|= (tf
->lbah
& 0xff) << 16;
843 sectors
|= (tf
->lbam
& 0xff) << 8;
844 sectors
|= (tf
->lbal
& 0xff);
850 * ata_read_native_max_address_ext - LBA48 native max query
851 * @dev: Device to query
853 * Perform an LBA48 size query upon the device in question. Return the
854 * actual LBA48 size or zero if the command fails.
857 static u64
ata_read_native_max_address_ext(struct ata_device
*dev
)
860 struct ata_taskfile tf
;
862 ata_tf_init(dev
, &tf
);
864 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
865 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
866 tf
.protocol
|= ATA_PROT_NODATA
;
869 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
873 return ata_tf_to_lba48(&tf
);
877 * ata_read_native_max_address - LBA28 native max query
878 * @dev: Device to query
880 * Performa an LBA28 size query upon the device in question. Return the
881 * actual LBA28 size or zero if the command fails.
884 static u64
ata_read_native_max_address(struct ata_device
*dev
)
887 struct ata_taskfile tf
;
889 ata_tf_init(dev
, &tf
);
891 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
892 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
893 tf
.protocol
|= ATA_PROT_NODATA
;
896 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
900 return ata_tf_to_lba(&tf
);
904 * ata_set_native_max_address_ext - LBA48 native max set
905 * @dev: Device to query
906 * @new_sectors: new max sectors value to set for the device
908 * Perform an LBA48 size set max upon the device in question. Return the
909 * actual LBA48 size or zero if the command fails.
912 static u64
ata_set_native_max_address_ext(struct ata_device
*dev
, u64 new_sectors
)
915 struct ata_taskfile tf
;
919 ata_tf_init(dev
, &tf
);
921 tf
.command
= ATA_CMD_SET_MAX_EXT
;
922 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
923 tf
.protocol
|= ATA_PROT_NODATA
;
926 tf
.lbal
= (new_sectors
>> 0) & 0xff;
927 tf
.lbam
= (new_sectors
>> 8) & 0xff;
928 tf
.lbah
= (new_sectors
>> 16) & 0xff;
930 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
931 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
932 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
934 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
938 return ata_tf_to_lba48(&tf
);
942 * ata_set_native_max_address - LBA28 native max set
943 * @dev: Device to query
944 * @new_sectors: new max sectors value to set for the device
946 * Perform an LBA28 size set max upon the device in question. Return the
947 * actual LBA28 size or zero if the command fails.
950 static u64
ata_set_native_max_address(struct ata_device
*dev
, u64 new_sectors
)
953 struct ata_taskfile tf
;
957 ata_tf_init(dev
, &tf
);
959 tf
.command
= ATA_CMD_SET_MAX
;
960 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
961 tf
.protocol
|= ATA_PROT_NODATA
;
963 tf
.lbal
= (new_sectors
>> 0) & 0xff;
964 tf
.lbam
= (new_sectors
>> 8) & 0xff;
965 tf
.lbah
= (new_sectors
>> 16) & 0xff;
966 tf
.device
|= ((new_sectors
>> 24) & 0x0f) | 0x40;
968 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
972 return ata_tf_to_lba(&tf
);
976 * ata_hpa_resize - Resize a device with an HPA set
977 * @dev: Device to resize
979 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
980 * it if required to the full size of the media. The caller must check
981 * the drive has the HPA feature set enabled.
984 static u64
ata_hpa_resize(struct ata_device
*dev
)
986 u64 sectors
= dev
->n_sectors
;
989 if (ata_id_has_lba48(dev
->id
))
990 hpa_sectors
= ata_read_native_max_address_ext(dev
);
992 hpa_sectors
= ata_read_native_max_address(dev
);
994 if (hpa_sectors
> sectors
) {
995 ata_dev_printk(dev
, KERN_INFO
,
996 "Host Protected Area detected:\n"
997 "\tcurrent size: %lld sectors\n"
998 "\tnative size: %lld sectors\n",
999 (long long)sectors
, (long long)hpa_sectors
);
1001 if (ata_ignore_hpa
) {
1002 if (ata_id_has_lba48(dev
->id
))
1003 hpa_sectors
= ata_set_native_max_address_ext(dev
, hpa_sectors
);
1005 hpa_sectors
= ata_set_native_max_address(dev
,
1009 ata_dev_printk(dev
, KERN_INFO
, "native size "
1010 "increased to %lld sectors\n",
1011 (long long)hpa_sectors
);
1015 } else if (hpa_sectors
< sectors
)
1016 ata_dev_printk(dev
, KERN_WARNING
, "%s 1: hpa sectors (%lld) "
1017 "is smaller than sectors (%lld)\n", __FUNCTION__
,
1018 (long long)hpa_sectors
, (long long)sectors
);
1023 static u64
ata_id_n_sectors(const u16
*id
)
1025 if (ata_id_has_lba(id
)) {
1026 if (ata_id_has_lba48(id
))
1027 return ata_id_u64(id
, 100);
1029 return ata_id_u32(id
, 60);
1031 if (ata_id_current_chs_valid(id
))
1032 return ata_id_u32(id
, 57);
1034 return id
[1] * id
[3] * id
[6];
1039 * ata_id_to_dma_mode - Identify DMA mode from id block
1040 * @dev: device to identify
1041 * @unknown: mode to assume if we cannot tell
1043 * Set up the timing values for the device based upon the identify
1044 * reported values for the DMA mode. This function is used by drivers
1045 * which rely upon firmware configured modes, but wish to report the
1046 * mode correctly when possible.
1048 * In addition we emit similarly formatted messages to the default
1049 * ata_dev_set_mode handler, in order to provide consistency of
1053 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1058 /* Pack the DMA modes */
1059 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1060 if (dev
->id
[53] & 0x04)
1061 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1063 /* Select the mode in use */
1064 mode
= ata_xfer_mask2mode(mask
);
1067 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1068 ata_mode_string(mask
));
1070 /* SWDMA perhaps ? */
1072 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1075 /* Configure the device reporting */
1076 dev
->xfer_mode
= mode
;
1077 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1081 * ata_noop_dev_select - Select device 0/1 on ATA bus
1082 * @ap: ATA channel to manipulate
1083 * @device: ATA device (numbered from zero) to select
1085 * This function performs no actual function.
1087 * May be used as the dev_select() entry in ata_port_operations.
1092 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1098 * ata_std_dev_select - Select device 0/1 on ATA bus
1099 * @ap: ATA channel to manipulate
1100 * @device: ATA device (numbered from zero) to select
1102 * Use the method defined in the ATA specification to
1103 * make either device 0, or device 1, active on the
1104 * ATA channel. Works with both PIO and MMIO.
1106 * May be used as the dev_select() entry in ata_port_operations.
1112 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1117 tmp
= ATA_DEVICE_OBS
;
1119 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1121 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1122 ata_pause(ap
); /* needed; also flushes, for mmio */
1126 * ata_dev_select - Select device 0/1 on ATA bus
1127 * @ap: ATA channel to manipulate
1128 * @device: ATA device (numbered from zero) to select
1129 * @wait: non-zero to wait for Status register BSY bit to clear
1130 * @can_sleep: non-zero if context allows sleeping
1132 * Use the method defined in the ATA specification to
1133 * make either device 0, or device 1, active on the
1136 * This is a high-level version of ata_std_dev_select(),
1137 * which additionally provides the services of inserting
1138 * the proper pauses and status polling, where needed.
1144 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1145 unsigned int wait
, unsigned int can_sleep
)
1147 if (ata_msg_probe(ap
))
1148 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1149 "device %u, wait %u\n", device
, wait
);
1154 ap
->ops
->dev_select(ap
, device
);
1157 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1164 * ata_dump_id - IDENTIFY DEVICE info debugging output
1165 * @id: IDENTIFY DEVICE page to dump
1167 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1174 static inline void ata_dump_id(const u16
*id
)
1176 DPRINTK("49==0x%04x "
1186 DPRINTK("80==0x%04x "
1196 DPRINTK("88==0x%04x "
1203 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1204 * @id: IDENTIFY data to compute xfer mask from
1206 * Compute the xfermask for this device. This is not as trivial
1207 * as it seems if we must consider early devices correctly.
1209 * FIXME: pre IDE drive timing (do we care ?).
1217 static unsigned int ata_id_xfermask(const u16
*id
)
1219 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1221 /* Usual case. Word 53 indicates word 64 is valid */
1222 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1223 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1227 /* If word 64 isn't valid then Word 51 high byte holds
1228 * the PIO timing number for the maximum. Turn it into
1231 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1232 if (mode
< 5) /* Valid PIO range */
1233 pio_mask
= (2 << mode
) - 1;
1237 /* But wait.. there's more. Design your standards by
1238 * committee and you too can get a free iordy field to
1239 * process. However its the speeds not the modes that
1240 * are supported... Note drivers using the timing API
1241 * will get this right anyway
1245 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1247 if (ata_id_is_cfa(id
)) {
1249 * Process compact flash extended modes
1251 int pio
= id
[163] & 0x7;
1252 int dma
= (id
[163] >> 3) & 7;
1255 pio_mask
|= (1 << 5);
1257 pio_mask
|= (1 << 6);
1259 mwdma_mask
|= (1 << 3);
1261 mwdma_mask
|= (1 << 4);
1265 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1266 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1268 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1272 * ata_port_queue_task - Queue port_task
1273 * @ap: The ata_port to queue port_task for
1274 * @fn: workqueue function to be scheduled
1275 * @data: data for @fn to use
1276 * @delay: delay time for workqueue function
1278 * Schedule @fn(@data) for execution after @delay jiffies using
1279 * port_task. There is one port_task per port and it's the
1280 * user(low level driver)'s responsibility to make sure that only
1281 * one task is active at any given time.
1283 * libata core layer takes care of synchronization between
1284 * port_task and EH. ata_port_queue_task() may be ignored for EH
1288 * Inherited from caller.
1290 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1291 unsigned long delay
)
1293 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1294 ap
->port_task_data
= data
;
1296 /* may fail if ata_port_flush_task() in progress */
1297 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1301 * ata_port_flush_task - Flush port_task
1302 * @ap: The ata_port to flush port_task for
1304 * After this function completes, port_task is guranteed not to
1305 * be running or scheduled.
1308 * Kernel thread context (may sleep)
1310 void ata_port_flush_task(struct ata_port
*ap
)
1314 cancel_rearming_delayed_work(&ap
->port_task
);
1316 if (ata_msg_ctl(ap
))
1317 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1320 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1322 struct completion
*waiting
= qc
->private_data
;
1328 * ata_exec_internal_sg - execute libata internal command
1329 * @dev: Device to which the command is sent
1330 * @tf: Taskfile registers for the command and the result
1331 * @cdb: CDB for packet command
1332 * @dma_dir: Data tranfer direction of the command
1333 * @sg: sg list for the data buffer of the command
1334 * @n_elem: Number of sg entries
1336 * Executes libata internal command with timeout. @tf contains
1337 * command on entry and result on return. Timeout and error
1338 * conditions are reported via return value. No recovery action
1339 * is taken after a command times out. It's caller's duty to
1340 * clean up after timeout.
1343 * None. Should be called with kernel context, might sleep.
1346 * Zero on success, AC_ERR_* mask on failure
1348 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1349 struct ata_taskfile
*tf
, const u8
*cdb
,
1350 int dma_dir
, struct scatterlist
*sg
,
1351 unsigned int n_elem
)
1353 struct ata_link
*link
= dev
->link
;
1354 struct ata_port
*ap
= link
->ap
;
1355 u8 command
= tf
->command
;
1356 struct ata_queued_cmd
*qc
;
1357 unsigned int tag
, preempted_tag
;
1358 u32 preempted_sactive
, preempted_qc_active
;
1359 DECLARE_COMPLETION_ONSTACK(wait
);
1360 unsigned long flags
;
1361 unsigned int err_mask
;
1364 spin_lock_irqsave(ap
->lock
, flags
);
1366 /* no internal command while frozen */
1367 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1368 spin_unlock_irqrestore(ap
->lock
, flags
);
1369 return AC_ERR_SYSTEM
;
1372 /* initialize internal qc */
1374 /* XXX: Tag 0 is used for drivers with legacy EH as some
1375 * drivers choke if any other tag is given. This breaks
1376 * ata_tag_internal() test for those drivers. Don't use new
1377 * EH stuff without converting to it.
1379 if (ap
->ops
->error_handler
)
1380 tag
= ATA_TAG_INTERNAL
;
1384 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1386 qc
= __ata_qc_from_tag(ap
, tag
);
1394 preempted_tag
= link
->active_tag
;
1395 preempted_sactive
= link
->sactive
;
1396 preempted_qc_active
= ap
->qc_active
;
1397 link
->active_tag
= ATA_TAG_POISON
;
1401 /* prepare & issue qc */
1404 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1405 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1406 qc
->dma_dir
= dma_dir
;
1407 if (dma_dir
!= DMA_NONE
) {
1408 unsigned int i
, buflen
= 0;
1410 for (i
= 0; i
< n_elem
; i
++)
1411 buflen
+= sg
[i
].length
;
1413 ata_sg_init(qc
, sg
, n_elem
);
1414 qc
->nbytes
= buflen
;
1417 qc
->private_data
= &wait
;
1418 qc
->complete_fn
= ata_qc_complete_internal
;
1422 spin_unlock_irqrestore(ap
->lock
, flags
);
1424 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1426 ata_port_flush_task(ap
);
1429 spin_lock_irqsave(ap
->lock
, flags
);
1431 /* We're racing with irq here. If we lose, the
1432 * following test prevents us from completing the qc
1433 * twice. If we win, the port is frozen and will be
1434 * cleaned up by ->post_internal_cmd().
1436 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1437 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1439 if (ap
->ops
->error_handler
)
1440 ata_port_freeze(ap
);
1442 ata_qc_complete(qc
);
1444 if (ata_msg_warn(ap
))
1445 ata_dev_printk(dev
, KERN_WARNING
,
1446 "qc timeout (cmd 0x%x)\n", command
);
1449 spin_unlock_irqrestore(ap
->lock
, flags
);
1452 /* do post_internal_cmd */
1453 if (ap
->ops
->post_internal_cmd
)
1454 ap
->ops
->post_internal_cmd(qc
);
1456 /* perform minimal error analysis */
1457 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1458 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1459 qc
->err_mask
|= AC_ERR_DEV
;
1462 qc
->err_mask
|= AC_ERR_OTHER
;
1464 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1465 qc
->err_mask
&= ~AC_ERR_OTHER
;
1469 spin_lock_irqsave(ap
->lock
, flags
);
1471 *tf
= qc
->result_tf
;
1472 err_mask
= qc
->err_mask
;
1475 link
->active_tag
= preempted_tag
;
1476 link
->sactive
= preempted_sactive
;
1477 ap
->qc_active
= preempted_qc_active
;
1479 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1480 * Until those drivers are fixed, we detect the condition
1481 * here, fail the command with AC_ERR_SYSTEM and reenable the
1484 * Note that this doesn't change any behavior as internal
1485 * command failure results in disabling the device in the
1486 * higher layer for LLDDs without new reset/EH callbacks.
1488 * Kill the following code as soon as those drivers are fixed.
1490 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1491 err_mask
|= AC_ERR_SYSTEM
;
1495 spin_unlock_irqrestore(ap
->lock
, flags
);
1501 * ata_exec_internal - execute libata internal command
1502 * @dev: Device to which the command is sent
1503 * @tf: Taskfile registers for the command and the result
1504 * @cdb: CDB for packet command
1505 * @dma_dir: Data tranfer direction of the command
1506 * @buf: Data buffer of the command
1507 * @buflen: Length of data buffer
1509 * Wrapper around ata_exec_internal_sg() which takes simple
1510 * buffer instead of sg list.
1513 * None. Should be called with kernel context, might sleep.
1516 * Zero on success, AC_ERR_* mask on failure
1518 unsigned ata_exec_internal(struct ata_device
*dev
,
1519 struct ata_taskfile
*tf
, const u8
*cdb
,
1520 int dma_dir
, void *buf
, unsigned int buflen
)
1522 struct scatterlist
*psg
= NULL
, sg
;
1523 unsigned int n_elem
= 0;
1525 if (dma_dir
!= DMA_NONE
) {
1527 sg_init_one(&sg
, buf
, buflen
);
1532 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1536 * ata_do_simple_cmd - execute simple internal command
1537 * @dev: Device to which the command is sent
1538 * @cmd: Opcode to execute
1540 * Execute a 'simple' command, that only consists of the opcode
1541 * 'cmd' itself, without filling any other registers
1544 * Kernel thread context (may sleep).
1547 * Zero on success, AC_ERR_* mask on failure
1549 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1551 struct ata_taskfile tf
;
1553 ata_tf_init(dev
, &tf
);
1556 tf
.flags
|= ATA_TFLAG_DEVICE
;
1557 tf
.protocol
= ATA_PROT_NODATA
;
1559 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1563 * ata_pio_need_iordy - check if iordy needed
1566 * Check if the current speed of the device requires IORDY. Used
1567 * by various controllers for chip configuration.
1570 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1572 /* Controller doesn't support IORDY. Probably a pointless check
1573 as the caller should know this */
1574 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1576 /* PIO3 and higher it is mandatory */
1577 if (adev
->pio_mode
> XFER_PIO_2
)
1579 /* We turn it on when possible */
1580 if (ata_id_has_iordy(adev
->id
))
1586 * ata_pio_mask_no_iordy - Return the non IORDY mask
1589 * Compute the highest mode possible if we are not using iordy. Return
1590 * -1 if no iordy mode is available.
1593 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1595 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1596 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1597 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1598 /* Is the speed faster than the drive allows non IORDY ? */
1600 /* This is cycle times not frequency - watch the logic! */
1601 if (pio
> 240) /* PIO2 is 240nS per cycle */
1602 return 3 << ATA_SHIFT_PIO
;
1603 return 7 << ATA_SHIFT_PIO
;
1606 return 3 << ATA_SHIFT_PIO
;
1610 * ata_dev_read_id - Read ID data from the specified device
1611 * @dev: target device
1612 * @p_class: pointer to class of the target device (may be changed)
1613 * @flags: ATA_READID_* flags
1614 * @id: buffer to read IDENTIFY data into
1616 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1617 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1618 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1619 * for pre-ATA4 drives.
1621 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1622 * now we abort if we hit that case.
1625 * Kernel thread context (may sleep)
1628 * 0 on success, -errno otherwise.
1630 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1631 unsigned int flags
, u16
*id
)
1633 struct ata_port
*ap
= dev
->link
->ap
;
1634 unsigned int class = *p_class
;
1635 struct ata_taskfile tf
;
1636 unsigned int err_mask
= 0;
1638 int may_fallback
= 1, tried_spinup
= 0;
1641 if (ata_msg_ctl(ap
))
1642 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1644 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1646 ata_tf_init(dev
, &tf
);
1650 tf
.command
= ATA_CMD_ID_ATA
;
1653 tf
.command
= ATA_CMD_ID_ATAPI
;
1657 reason
= "unsupported class";
1661 tf
.protocol
= ATA_PROT_PIO
;
1663 /* Some devices choke if TF registers contain garbage. Make
1664 * sure those are properly initialized.
1666 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1668 /* Device presence detection is unreliable on some
1669 * controllers. Always poll IDENTIFY if available.
1671 tf
.flags
|= ATA_TFLAG_POLLING
;
1673 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1674 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1676 if (err_mask
& AC_ERR_NODEV_HINT
) {
1677 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1678 ap
->print_id
, dev
->devno
);
1682 /* Device or controller might have reported the wrong
1683 * device class. Give a shot at the other IDENTIFY if
1684 * the current one is aborted by the device.
1687 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1690 if (class == ATA_DEV_ATA
)
1691 class = ATA_DEV_ATAPI
;
1693 class = ATA_DEV_ATA
;
1698 reason
= "I/O error";
1702 /* Falling back doesn't make sense if ID data was read
1703 * successfully at least once.
1707 swap_buf_le16(id
, ATA_ID_WORDS
);
1711 reason
= "device reports invalid type";
1713 if (class == ATA_DEV_ATA
) {
1714 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1717 if (ata_id_is_ata(id
))
1721 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1724 * Drive powered-up in standby mode, and requires a specific
1725 * SET_FEATURES spin-up subcommand before it will accept
1726 * anything other than the original IDENTIFY command.
1728 ata_tf_init(dev
, &tf
);
1729 tf
.command
= ATA_CMD_SET_FEATURES
;
1730 tf
.feature
= SETFEATURES_SPINUP
;
1731 tf
.protocol
= ATA_PROT_NODATA
;
1732 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1733 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1734 if (err_mask
&& id
[2] != 0x738c) {
1736 reason
= "SPINUP failed";
1740 * If the drive initially returned incomplete IDENTIFY info,
1741 * we now must reissue the IDENTIFY command.
1743 if (id
[2] == 0x37c8)
1747 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1749 * The exact sequence expected by certain pre-ATA4 drives is:
1751 * IDENTIFY (optional in early ATA)
1752 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1754 * Some drives were very specific about that exact sequence.
1756 * Note that ATA4 says lba is mandatory so the second check
1757 * shoud never trigger.
1759 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1760 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1763 reason
= "INIT_DEV_PARAMS failed";
1767 /* current CHS translation info (id[53-58]) might be
1768 * changed. reread the identify device info.
1770 flags
&= ~ATA_READID_POSTRESET
;
1780 if (ata_msg_warn(ap
))
1781 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1782 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1786 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1788 struct ata_port
*ap
= dev
->link
->ap
;
1789 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1792 static void ata_dev_config_ncq(struct ata_device
*dev
,
1793 char *desc
, size_t desc_sz
)
1795 struct ata_port
*ap
= dev
->link
->ap
;
1796 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1798 if (!ata_id_has_ncq(dev
->id
)) {
1802 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1803 snprintf(desc
, desc_sz
, "NCQ (not used)");
1806 if (ap
->flags
& ATA_FLAG_NCQ
) {
1807 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1808 dev
->flags
|= ATA_DFLAG_NCQ
;
1811 if (hdepth
>= ddepth
)
1812 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1814 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1818 * ata_dev_configure - Configure the specified ATA/ATAPI device
1819 * @dev: Target device to configure
1821 * Configure @dev according to @dev->id. Generic and low-level
1822 * driver specific fixups are also applied.
1825 * Kernel thread context (may sleep)
1828 * 0 on success, -errno otherwise
1830 int ata_dev_configure(struct ata_device
*dev
)
1832 struct ata_port
*ap
= dev
->link
->ap
;
1833 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1834 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1835 const u16
*id
= dev
->id
;
1836 unsigned int xfer_mask
;
1837 char revbuf
[7]; /* XYZ-99\0 */
1838 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1839 char modelbuf
[ATA_ID_PROD_LEN
+1];
1842 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1843 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1848 if (ata_msg_probe(ap
))
1849 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1852 dev
->horkage
|= ata_dev_blacklisted(dev
);
1854 /* let ACPI work its magic */
1855 rc
= ata_acpi_on_devcfg(dev
);
1859 /* print device capabilities */
1860 if (ata_msg_probe(ap
))
1861 ata_dev_printk(dev
, KERN_DEBUG
,
1862 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1863 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1865 id
[49], id
[82], id
[83], id
[84],
1866 id
[85], id
[86], id
[87], id
[88]);
1868 /* initialize to-be-configured parameters */
1869 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1870 dev
->max_sectors
= 0;
1878 * common ATA, ATAPI feature tests
1881 /* find max transfer mode; for printk only */
1882 xfer_mask
= ata_id_xfermask(id
);
1884 if (ata_msg_probe(ap
))
1887 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1888 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1891 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1894 /* ATA-specific feature tests */
1895 if (dev
->class == ATA_DEV_ATA
) {
1896 if (ata_id_is_cfa(id
)) {
1897 if (id
[162] & 1) /* CPRM may make this media unusable */
1898 ata_dev_printk(dev
, KERN_WARNING
,
1899 "supports DRM functions and may "
1900 "not be fully accessable.\n");
1901 snprintf(revbuf
, 7, "CFA");
1904 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1906 dev
->n_sectors
= ata_id_n_sectors(id
);
1908 if (dev
->id
[59] & 0x100)
1909 dev
->multi_count
= dev
->id
[59] & 0xff;
1911 if (ata_id_has_lba(id
)) {
1912 const char *lba_desc
;
1916 dev
->flags
|= ATA_DFLAG_LBA
;
1917 if (ata_id_has_lba48(id
)) {
1918 dev
->flags
|= ATA_DFLAG_LBA48
;
1921 if (dev
->n_sectors
>= (1UL << 28) &&
1922 ata_id_has_flush_ext(id
))
1923 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1926 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
) &&
1927 ata_id_hpa_enabled(dev
->id
))
1928 dev
->n_sectors
= ata_hpa_resize(dev
);
1931 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1933 /* print device info to dmesg */
1934 if (ata_msg_drv(ap
) && print_info
) {
1935 ata_dev_printk(dev
, KERN_INFO
,
1936 "%s: %s, %s, max %s\n",
1937 revbuf
, modelbuf
, fwrevbuf
,
1938 ata_mode_string(xfer_mask
));
1939 ata_dev_printk(dev
, KERN_INFO
,
1940 "%Lu sectors, multi %u: %s %s\n",
1941 (unsigned long long)dev
->n_sectors
,
1942 dev
->multi_count
, lba_desc
, ncq_desc
);
1947 /* Default translation */
1948 dev
->cylinders
= id
[1];
1950 dev
->sectors
= id
[6];
1952 if (ata_id_current_chs_valid(id
)) {
1953 /* Current CHS translation is valid. */
1954 dev
->cylinders
= id
[54];
1955 dev
->heads
= id
[55];
1956 dev
->sectors
= id
[56];
1959 /* print device info to dmesg */
1960 if (ata_msg_drv(ap
) && print_info
) {
1961 ata_dev_printk(dev
, KERN_INFO
,
1962 "%s: %s, %s, max %s\n",
1963 revbuf
, modelbuf
, fwrevbuf
,
1964 ata_mode_string(xfer_mask
));
1965 ata_dev_printk(dev
, KERN_INFO
,
1966 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1967 (unsigned long long)dev
->n_sectors
,
1968 dev
->multi_count
, dev
->cylinders
,
1969 dev
->heads
, dev
->sectors
);
1976 /* ATAPI-specific feature tests */
1977 else if (dev
->class == ATA_DEV_ATAPI
) {
1978 char *cdb_intr_string
= "";
1980 rc
= atapi_cdb_len(id
);
1981 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1982 if (ata_msg_warn(ap
))
1983 ata_dev_printk(dev
, KERN_WARNING
,
1984 "unsupported CDB len\n");
1988 dev
->cdb_len
= (unsigned int) rc
;
1990 if (ata_id_cdb_intr(dev
->id
)) {
1991 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1992 cdb_intr_string
= ", CDB intr";
1995 /* print device info to dmesg */
1996 if (ata_msg_drv(ap
) && print_info
)
1997 ata_dev_printk(dev
, KERN_INFO
,
1998 "ATAPI: %s, %s, max %s%s\n",
2000 ata_mode_string(xfer_mask
),
2004 /* determine max_sectors */
2005 dev
->max_sectors
= ATA_MAX_SECTORS
;
2006 if (dev
->flags
& ATA_DFLAG_LBA48
)
2007 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2009 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2010 /* Let the user know. We don't want to disallow opens for
2011 rescue purposes, or in case the vendor is just a blithering
2014 ata_dev_printk(dev
, KERN_WARNING
,
2015 "Drive reports diagnostics failure. This may indicate a drive\n");
2016 ata_dev_printk(dev
, KERN_WARNING
,
2017 "fault or invalid emulation. Contact drive vendor for information.\n");
2021 /* limit bridge transfers to udma5, 200 sectors */
2022 if (ata_dev_knobble(dev
)) {
2023 if (ata_msg_drv(ap
) && print_info
)
2024 ata_dev_printk(dev
, KERN_INFO
,
2025 "applying bridge limits\n");
2026 dev
->udma_mask
&= ATA_UDMA5
;
2027 dev
->max_sectors
= ATA_MAX_SECTORS
;
2030 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2031 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2034 if (ap
->ops
->dev_config
)
2035 ap
->ops
->dev_config(dev
);
2037 if (ata_msg_probe(ap
))
2038 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2039 __FUNCTION__
, ata_chk_status(ap
));
2043 if (ata_msg_probe(ap
))
2044 ata_dev_printk(dev
, KERN_DEBUG
,
2045 "%s: EXIT, err\n", __FUNCTION__
);
2050 * ata_cable_40wire - return 40 wire cable type
2053 * Helper method for drivers which want to hardwire 40 wire cable
2057 int ata_cable_40wire(struct ata_port
*ap
)
2059 return ATA_CBL_PATA40
;
2063 * ata_cable_80wire - return 80 wire cable type
2066 * Helper method for drivers which want to hardwire 80 wire cable
2070 int ata_cable_80wire(struct ata_port
*ap
)
2072 return ATA_CBL_PATA80
;
2076 * ata_cable_unknown - return unknown PATA cable.
2079 * Helper method for drivers which have no PATA cable detection.
2082 int ata_cable_unknown(struct ata_port
*ap
)
2084 return ATA_CBL_PATA_UNK
;
2088 * ata_cable_sata - return SATA cable type
2091 * Helper method for drivers which have SATA cables
2094 int ata_cable_sata(struct ata_port
*ap
)
2096 return ATA_CBL_SATA
;
2100 * ata_bus_probe - Reset and probe ATA bus
2103 * Master ATA bus probing function. Initiates a hardware-dependent
2104 * bus reset, then attempts to identify any devices found on
2108 * PCI/etc. bus probe sem.
2111 * Zero on success, negative errno otherwise.
2114 int ata_bus_probe(struct ata_port
*ap
)
2116 unsigned int classes
[ATA_MAX_DEVICES
];
2117 int tries
[ATA_MAX_DEVICES
];
2119 struct ata_device
*dev
;
2123 ata_link_for_each_dev(dev
, &ap
->link
)
2124 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2127 /* reset and determine device classes */
2128 ap
->ops
->phy_reset(ap
);
2130 ata_link_for_each_dev(dev
, &ap
->link
) {
2131 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2132 dev
->class != ATA_DEV_UNKNOWN
)
2133 classes
[dev
->devno
] = dev
->class;
2135 classes
[dev
->devno
] = ATA_DEV_NONE
;
2137 dev
->class = ATA_DEV_UNKNOWN
;
2142 /* after the reset the device state is PIO 0 and the controller
2143 state is undefined. Record the mode */
2145 ata_link_for_each_dev(dev
, &ap
->link
)
2146 dev
->pio_mode
= XFER_PIO_0
;
2148 /* read IDENTIFY page and configure devices. We have to do the identify
2149 specific sequence bass-ackwards so that PDIAG- is released by
2152 ata_link_for_each_dev(dev
, &ap
->link
) {
2153 if (tries
[dev
->devno
])
2154 dev
->class = classes
[dev
->devno
];
2156 if (!ata_dev_enabled(dev
))
2159 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2165 /* Now ask for the cable type as PDIAG- should have been released */
2166 if (ap
->ops
->cable_detect
)
2167 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2169 /* After the identify sequence we can now set up the devices. We do
2170 this in the normal order so that the user doesn't get confused */
2172 ata_link_for_each_dev(dev
, &ap
->link
) {
2173 if (!ata_dev_enabled(dev
))
2176 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2177 rc
= ata_dev_configure(dev
);
2178 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2183 /* configure transfer mode */
2184 rc
= ata_set_mode(&ap
->link
, &dev
);
2188 ata_link_for_each_dev(dev
, &ap
->link
)
2189 if (ata_dev_enabled(dev
))
2192 /* no device present, disable port */
2193 ata_port_disable(ap
);
2194 ap
->ops
->port_disable(ap
);
2198 tries
[dev
->devno
]--;
2202 /* eeek, something went very wrong, give up */
2203 tries
[dev
->devno
] = 0;
2207 /* give it just one more chance */
2208 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2210 if (tries
[dev
->devno
] == 1) {
2211 /* This is the last chance, better to slow
2212 * down than lose it.
2214 sata_down_spd_limit(&ap
->link
);
2215 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2219 if (!tries
[dev
->devno
])
2220 ata_dev_disable(dev
);
2226 * ata_port_probe - Mark port as enabled
2227 * @ap: Port for which we indicate enablement
2229 * Modify @ap data structure such that the system
2230 * thinks that the entire port is enabled.
2232 * LOCKING: host lock, or some other form of
2236 void ata_port_probe(struct ata_port
*ap
)
2238 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2242 * sata_print_link_status - Print SATA link status
2243 * @link: SATA link to printk link status about
2245 * This function prints link speed and status of a SATA link.
2250 void sata_print_link_status(struct ata_link
*link
)
2252 u32 sstatus
, scontrol
, tmp
;
2254 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2256 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2258 if (ata_link_online(link
)) {
2259 tmp
= (sstatus
>> 4) & 0xf;
2260 ata_link_printk(link
, KERN_INFO
,
2261 "SATA link up %s (SStatus %X SControl %X)\n",
2262 sata_spd_string(tmp
), sstatus
, scontrol
);
2264 ata_link_printk(link
, KERN_INFO
,
2265 "SATA link down (SStatus %X SControl %X)\n",
2271 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2272 * @ap: SATA port associated with target SATA PHY.
2274 * This function issues commands to standard SATA Sxxx
2275 * PHY registers, to wake up the phy (and device), and
2276 * clear any reset condition.
2279 * PCI/etc. bus probe sem.
2282 void __sata_phy_reset(struct ata_port
*ap
)
2284 struct ata_link
*link
= &ap
->link
;
2285 unsigned long timeout
= jiffies
+ (HZ
* 5);
2288 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2289 /* issue phy wake/reset */
2290 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2291 /* Couldn't find anything in SATA I/II specs, but
2292 * AHCI-1.1 10.4.2 says at least 1 ms. */
2295 /* phy wake/clear reset */
2296 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2298 /* wait for phy to become ready, if necessary */
2301 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2302 if ((sstatus
& 0xf) != 1)
2304 } while (time_before(jiffies
, timeout
));
2306 /* print link status */
2307 sata_print_link_status(link
);
2309 /* TODO: phy layer with polling, timeouts, etc. */
2310 if (!ata_link_offline(link
))
2313 ata_port_disable(ap
);
2315 if (ap
->flags
& ATA_FLAG_DISABLED
)
2318 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2319 ata_port_disable(ap
);
2323 ap
->cbl
= ATA_CBL_SATA
;
2327 * sata_phy_reset - Reset SATA bus.
2328 * @ap: SATA port associated with target SATA PHY.
2330 * This function resets the SATA bus, and then probes
2331 * the bus for devices.
2334 * PCI/etc. bus probe sem.
2337 void sata_phy_reset(struct ata_port
*ap
)
2339 __sata_phy_reset(ap
);
2340 if (ap
->flags
& ATA_FLAG_DISABLED
)
2346 * ata_dev_pair - return other device on cable
2349 * Obtain the other device on the same cable, or if none is
2350 * present NULL is returned
2353 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2355 struct ata_link
*link
= adev
->link
;
2356 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2357 if (!ata_dev_enabled(pair
))
2363 * ata_port_disable - Disable port.
2364 * @ap: Port to be disabled.
2366 * Modify @ap data structure such that the system
2367 * thinks that the entire port is disabled, and should
2368 * never attempt to probe or communicate with devices
2371 * LOCKING: host lock, or some other form of
2375 void ata_port_disable(struct ata_port
*ap
)
2377 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2378 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2379 ap
->flags
|= ATA_FLAG_DISABLED
;
2383 * sata_down_spd_limit - adjust SATA spd limit downward
2384 * @link: Link to adjust SATA spd limit for
2386 * Adjust SATA spd limit of @link downward. Note that this
2387 * function only adjusts the limit. The change must be applied
2388 * using sata_set_spd().
2391 * Inherited from caller.
2394 * 0 on success, negative errno on failure
2396 int sata_down_spd_limit(struct ata_link
*link
)
2398 u32 sstatus
, spd
, mask
;
2401 if (!sata_scr_valid(link
))
2404 /* If SCR can be read, use it to determine the current SPD.
2405 * If not, use cached value in link->sata_spd.
2407 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2409 spd
= (sstatus
>> 4) & 0xf;
2411 spd
= link
->sata_spd
;
2413 mask
= link
->sata_spd_limit
;
2417 /* unconditionally mask off the highest bit */
2418 highbit
= fls(mask
) - 1;
2419 mask
&= ~(1 << highbit
);
2421 /* Mask off all speeds higher than or equal to the current
2422 * one. Force 1.5Gbps if current SPD is not available.
2425 mask
&= (1 << (spd
- 1)) - 1;
2429 /* were we already at the bottom? */
2433 link
->sata_spd_limit
= mask
;
2435 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2436 sata_spd_string(fls(mask
)));
2441 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2445 if (link
->sata_spd_limit
== UINT_MAX
)
2448 limit
= fls(link
->sata_spd_limit
);
2450 spd
= (*scontrol
>> 4) & 0xf;
2451 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2453 return spd
!= limit
;
2457 * sata_set_spd_needed - is SATA spd configuration needed
2458 * @link: Link in question
2460 * Test whether the spd limit in SControl matches
2461 * @link->sata_spd_limit. This function is used to determine
2462 * whether hardreset is necessary to apply SATA spd
2466 * Inherited from caller.
2469 * 1 if SATA spd configuration is needed, 0 otherwise.
2471 int sata_set_spd_needed(struct ata_link
*link
)
2475 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2478 return __sata_set_spd_needed(link
, &scontrol
);
2482 * sata_set_spd - set SATA spd according to spd limit
2483 * @link: Link to set SATA spd for
2485 * Set SATA spd of @link according to sata_spd_limit.
2488 * Inherited from caller.
2491 * 0 if spd doesn't need to be changed, 1 if spd has been
2492 * changed. Negative errno if SCR registers are inaccessible.
2494 int sata_set_spd(struct ata_link
*link
)
2499 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2502 if (!__sata_set_spd_needed(link
, &scontrol
))
2505 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2512 * This mode timing computation functionality is ported over from
2513 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2516 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2517 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2518 * for UDMA6, which is currently supported only by Maxtor drives.
2520 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2523 static const struct ata_timing ata_timing
[] = {
2525 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2526 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2527 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2528 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2530 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2531 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2532 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2533 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2534 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2536 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2538 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2539 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2540 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2542 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2543 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2544 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2546 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2547 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2548 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2549 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2551 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2552 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2553 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2555 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2560 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2561 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2563 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2565 q
->setup
= EZ(t
->setup
* 1000, T
);
2566 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2567 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2568 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2569 q
->active
= EZ(t
->active
* 1000, T
);
2570 q
->recover
= EZ(t
->recover
* 1000, T
);
2571 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2572 q
->udma
= EZ(t
->udma
* 1000, UT
);
2575 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2576 struct ata_timing
*m
, unsigned int what
)
2578 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2579 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2580 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2581 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2582 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2583 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2584 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2585 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2588 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2590 const struct ata_timing
*t
;
2592 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2593 if (t
->mode
== 0xFF)
2598 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2599 struct ata_timing
*t
, int T
, int UT
)
2601 const struct ata_timing
*s
;
2602 struct ata_timing p
;
2608 if (!(s
= ata_timing_find_mode(speed
)))
2611 memcpy(t
, s
, sizeof(*s
));
2614 * If the drive is an EIDE drive, it can tell us it needs extended
2615 * PIO/MW_DMA cycle timing.
2618 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2619 memset(&p
, 0, sizeof(p
));
2620 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2621 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2622 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2623 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2624 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2626 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2630 * Convert the timing to bus clock counts.
2633 ata_timing_quantize(t
, t
, T
, UT
);
2636 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2637 * S.M.A.R.T * and some other commands. We have to ensure that the
2638 * DMA cycle timing is slower/equal than the fastest PIO timing.
2641 if (speed
> XFER_PIO_6
) {
2642 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2643 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2647 * Lengthen active & recovery time so that cycle time is correct.
2650 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2651 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2652 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2655 if (t
->active
+ t
->recover
< t
->cycle
) {
2656 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2657 t
->recover
= t
->cycle
- t
->active
;
2660 /* In a few cases quantisation may produce enough errors to
2661 leave t->cycle too low for the sum of active and recovery
2662 if so we must correct this */
2663 if (t
->active
+ t
->recover
> t
->cycle
)
2664 t
->cycle
= t
->active
+ t
->recover
;
2670 * ata_down_xfermask_limit - adjust dev xfer masks downward
2671 * @dev: Device to adjust xfer masks
2672 * @sel: ATA_DNXFER_* selector
2674 * Adjust xfer masks of @dev downward. Note that this function
2675 * does not apply the change. Invoking ata_set_mode() afterwards
2676 * will apply the limit.
2679 * Inherited from caller.
2682 * 0 on success, negative errno on failure
2684 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2687 unsigned int orig_mask
, xfer_mask
;
2688 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2691 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2692 sel
&= ~ATA_DNXFER_QUIET
;
2694 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2697 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2700 case ATA_DNXFER_PIO
:
2701 highbit
= fls(pio_mask
) - 1;
2702 pio_mask
&= ~(1 << highbit
);
2705 case ATA_DNXFER_DMA
:
2707 highbit
= fls(udma_mask
) - 1;
2708 udma_mask
&= ~(1 << highbit
);
2711 } else if (mwdma_mask
) {
2712 highbit
= fls(mwdma_mask
) - 1;
2713 mwdma_mask
&= ~(1 << highbit
);
2719 case ATA_DNXFER_40C
:
2720 udma_mask
&= ATA_UDMA_MASK_40C
;
2723 case ATA_DNXFER_FORCE_PIO0
:
2725 case ATA_DNXFER_FORCE_PIO
:
2734 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2736 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2740 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2741 snprintf(buf
, sizeof(buf
), "%s:%s",
2742 ata_mode_string(xfer_mask
),
2743 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2745 snprintf(buf
, sizeof(buf
), "%s",
2746 ata_mode_string(xfer_mask
));
2748 ata_dev_printk(dev
, KERN_WARNING
,
2749 "limiting speed to %s\n", buf
);
2752 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2758 static int ata_dev_set_mode(struct ata_device
*dev
)
2760 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2761 unsigned int err_mask
;
2764 dev
->flags
&= ~ATA_DFLAG_PIO
;
2765 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2766 dev
->flags
|= ATA_DFLAG_PIO
;
2768 err_mask
= ata_dev_set_xfermode(dev
);
2769 /* Old CFA may refuse this command, which is just fine */
2770 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2771 err_mask
&= ~AC_ERR_DEV
;
2772 /* Some very old devices and some bad newer ones fail any kind of
2773 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2774 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2775 dev
->pio_mode
<= XFER_PIO_2
)
2776 err_mask
&= ~AC_ERR_DEV
;
2778 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2779 "(err_mask=0x%x)\n", err_mask
);
2783 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2784 rc
= ata_dev_revalidate(dev
, 0);
2785 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2789 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2790 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2792 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2793 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2798 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2799 * @link: link on which timings will be programmed
2800 * @r_failed_dev: out paramter for failed device
2802 * Standard implementation of the function used to tune and set
2803 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2804 * ata_dev_set_mode() fails, pointer to the failing device is
2805 * returned in @r_failed_dev.
2808 * PCI/etc. bus probe sem.
2811 * 0 on success, negative errno otherwise
2814 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2816 struct ata_port
*ap
= link
->ap
;
2817 struct ata_device
*dev
;
2818 int rc
= 0, used_dma
= 0, found
= 0;
2820 /* step 1: calculate xfer_mask */
2821 ata_link_for_each_dev(dev
, link
) {
2822 unsigned int pio_mask
, dma_mask
;
2824 if (!ata_dev_enabled(dev
))
2827 ata_dev_xfermask(dev
);
2829 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2830 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2831 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2832 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2841 /* step 2: always set host PIO timings */
2842 ata_link_for_each_dev(dev
, link
) {
2843 if (!ata_dev_enabled(dev
))
2846 if (!dev
->pio_mode
) {
2847 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2852 dev
->xfer_mode
= dev
->pio_mode
;
2853 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2854 if (ap
->ops
->set_piomode
)
2855 ap
->ops
->set_piomode(ap
, dev
);
2858 /* step 3: set host DMA timings */
2859 ata_link_for_each_dev(dev
, link
) {
2860 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2863 dev
->xfer_mode
= dev
->dma_mode
;
2864 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2865 if (ap
->ops
->set_dmamode
)
2866 ap
->ops
->set_dmamode(ap
, dev
);
2869 /* step 4: update devices' xfer mode */
2870 ata_link_for_each_dev(dev
, link
) {
2871 /* don't update suspended devices' xfer mode */
2872 if (!ata_dev_enabled(dev
))
2875 rc
= ata_dev_set_mode(dev
);
2880 /* Record simplex status. If we selected DMA then the other
2881 * host channels are not permitted to do so.
2883 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2884 ap
->host
->simplex_claimed
= ap
;
2888 *r_failed_dev
= dev
;
2893 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2894 * @link: link on which timings will be programmed
2895 * @r_failed_dev: out paramter for failed device
2897 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2898 * ata_set_mode() fails, pointer to the failing device is
2899 * returned in @r_failed_dev.
2902 * PCI/etc. bus probe sem.
2905 * 0 on success, negative errno otherwise
2907 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2909 struct ata_port
*ap
= link
->ap
;
2911 /* has private set_mode? */
2912 if (ap
->ops
->set_mode
)
2913 return ap
->ops
->set_mode(link
, r_failed_dev
);
2914 return ata_do_set_mode(link
, r_failed_dev
);
2918 * ata_tf_to_host - issue ATA taskfile to host controller
2919 * @ap: port to which command is being issued
2920 * @tf: ATA taskfile register set
2922 * Issues ATA taskfile register set to ATA host controller,
2923 * with proper synchronization with interrupt handler and
2927 * spin_lock_irqsave(host lock)
2930 static inline void ata_tf_to_host(struct ata_port
*ap
,
2931 const struct ata_taskfile
*tf
)
2933 ap
->ops
->tf_load(ap
, tf
);
2934 ap
->ops
->exec_command(ap
, tf
);
2938 * ata_busy_sleep - sleep until BSY clears, or timeout
2939 * @ap: port containing status register to be polled
2940 * @tmout_pat: impatience timeout
2941 * @tmout: overall timeout
2943 * Sleep until ATA Status register bit BSY clears,
2944 * or a timeout occurs.
2947 * Kernel thread context (may sleep).
2950 * 0 on success, -errno otherwise.
2952 int ata_busy_sleep(struct ata_port
*ap
,
2953 unsigned long tmout_pat
, unsigned long tmout
)
2955 unsigned long timer_start
, timeout
;
2958 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2959 timer_start
= jiffies
;
2960 timeout
= timer_start
+ tmout_pat
;
2961 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2962 time_before(jiffies
, timeout
)) {
2964 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2967 if (status
!= 0xff && (status
& ATA_BUSY
))
2968 ata_port_printk(ap
, KERN_WARNING
,
2969 "port is slow to respond, please be patient "
2970 "(Status 0x%x)\n", status
);
2972 timeout
= timer_start
+ tmout
;
2973 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2974 time_before(jiffies
, timeout
)) {
2976 status
= ata_chk_status(ap
);
2982 if (status
& ATA_BUSY
) {
2983 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2984 "(%lu secs, Status 0x%x)\n",
2985 tmout
/ HZ
, status
);
2993 * ata_wait_ready - sleep until BSY clears, or timeout
2994 * @ap: port containing status register to be polled
2995 * @deadline: deadline jiffies for the operation
2997 * Sleep until ATA Status register bit BSY clears, or timeout
3001 * Kernel thread context (may sleep).
3004 * 0 on success, -errno otherwise.
3006 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3008 unsigned long start
= jiffies
;
3012 u8 status
= ata_chk_status(ap
);
3013 unsigned long now
= jiffies
;
3015 if (!(status
& ATA_BUSY
))
3017 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3019 if (time_after(now
, deadline
))
3022 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3023 (deadline
- now
> 3 * HZ
)) {
3024 ata_port_printk(ap
, KERN_WARNING
,
3025 "port is slow to respond, please be patient "
3026 "(Status 0x%x)\n", status
);
3034 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3035 unsigned long deadline
)
3037 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3038 unsigned int dev0
= devmask
& (1 << 0);
3039 unsigned int dev1
= devmask
& (1 << 1);
3042 /* if device 0 was found in ata_devchk, wait for its
3046 rc
= ata_wait_ready(ap
, deadline
);
3054 /* if device 1 was found in ata_devchk, wait for register
3055 * access briefly, then wait for BSY to clear.
3060 ap
->ops
->dev_select(ap
, 1);
3062 /* Wait for register access. Some ATAPI devices fail
3063 * to set nsect/lbal after reset, so don't waste too
3064 * much time on it. We're gonna wait for !BSY anyway.
3066 for (i
= 0; i
< 2; i
++) {
3069 nsect
= ioread8(ioaddr
->nsect_addr
);
3070 lbal
= ioread8(ioaddr
->lbal_addr
);
3071 if ((nsect
== 1) && (lbal
== 1))
3073 msleep(50); /* give drive a breather */
3076 rc
= ata_wait_ready(ap
, deadline
);
3084 /* is all this really necessary? */
3085 ap
->ops
->dev_select(ap
, 0);
3087 ap
->ops
->dev_select(ap
, 1);
3089 ap
->ops
->dev_select(ap
, 0);
3094 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3095 unsigned long deadline
)
3097 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3099 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3101 /* software reset. causes dev0 to be selected */
3102 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3103 udelay(20); /* FIXME: flush */
3104 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3105 udelay(20); /* FIXME: flush */
3106 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3108 /* spec mandates ">= 2ms" before checking status.
3109 * We wait 150ms, because that was the magic delay used for
3110 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3111 * between when the ATA command register is written, and then
3112 * status is checked. Because waiting for "a while" before
3113 * checking status is fine, post SRST, we perform this magic
3114 * delay here as well.
3116 * Old drivers/ide uses the 2mS rule and then waits for ready
3120 /* Before we perform post reset processing we want to see if
3121 * the bus shows 0xFF because the odd clown forgets the D7
3122 * pulldown resistor.
3124 if (ata_check_status(ap
) == 0xFF)
3127 return ata_bus_post_reset(ap
, devmask
, deadline
);
3131 * ata_bus_reset - reset host port and associated ATA channel
3132 * @ap: port to reset
3134 * This is typically the first time we actually start issuing
3135 * commands to the ATA channel. We wait for BSY to clear, then
3136 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3137 * result. Determine what devices, if any, are on the channel
3138 * by looking at the device 0/1 error register. Look at the signature
3139 * stored in each device's taskfile registers, to determine if
3140 * the device is ATA or ATAPI.
3143 * PCI/etc. bus probe sem.
3144 * Obtains host lock.
3147 * Sets ATA_FLAG_DISABLED if bus reset fails.
3150 void ata_bus_reset(struct ata_port
*ap
)
3152 struct ata_device
*device
= ap
->link
.device
;
3153 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3154 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3156 unsigned int dev0
, dev1
= 0, devmask
= 0;
3159 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3161 /* determine if device 0/1 are present */
3162 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3165 dev0
= ata_devchk(ap
, 0);
3167 dev1
= ata_devchk(ap
, 1);
3171 devmask
|= (1 << 0);
3173 devmask
|= (1 << 1);
3175 /* select device 0 again */
3176 ap
->ops
->dev_select(ap
, 0);
3178 /* issue bus reset */
3179 if (ap
->flags
& ATA_FLAG_SRST
) {
3180 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3181 if (rc
&& rc
!= -ENODEV
)
3186 * determine by signature whether we have ATA or ATAPI devices
3188 device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
3189 if ((slave_possible
) && (err
!= 0x81))
3190 device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
3192 /* is double-select really necessary? */
3193 if (device
[1].class != ATA_DEV_NONE
)
3194 ap
->ops
->dev_select(ap
, 1);
3195 if (device
[0].class != ATA_DEV_NONE
)
3196 ap
->ops
->dev_select(ap
, 0);
3198 /* if no devices were detected, disable this port */
3199 if ((device
[0].class == ATA_DEV_NONE
) &&
3200 (device
[1].class == ATA_DEV_NONE
))
3203 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3204 /* set up device control for ATA_FLAG_SATA_RESET */
3205 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3212 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3213 ap
->ops
->port_disable(ap
);
3219 * sata_link_debounce - debounce SATA phy status
3220 * @link: ATA link to debounce SATA phy status for
3221 * @params: timing parameters { interval, duratinon, timeout } in msec
3222 * @deadline: deadline jiffies for the operation
3224 * Make sure SStatus of @link reaches stable state, determined by
3225 * holding the same value where DET is not 1 for @duration polled
3226 * every @interval, before @timeout. Timeout constraints the
3227 * beginning of the stable state. Because DET gets stuck at 1 on
3228 * some controllers after hot unplugging, this functions waits
3229 * until timeout then returns 0 if DET is stable at 1.
3231 * @timeout is further limited by @deadline. The sooner of the
3235 * Kernel thread context (may sleep)
3238 * 0 on success, -errno on failure.
3240 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3241 unsigned long deadline
)
3243 unsigned long interval_msec
= params
[0];
3244 unsigned long duration
= msecs_to_jiffies(params
[1]);
3245 unsigned long last_jiffies
, t
;
3249 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3250 if (time_before(t
, deadline
))
3253 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3258 last_jiffies
= jiffies
;
3261 msleep(interval_msec
);
3262 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3268 if (cur
== 1 && time_before(jiffies
, deadline
))
3270 if (time_after(jiffies
, last_jiffies
+ duration
))
3275 /* unstable, start over */
3277 last_jiffies
= jiffies
;
3279 /* Check deadline. If debouncing failed, return
3280 * -EPIPE to tell upper layer to lower link speed.
3282 if (time_after(jiffies
, deadline
))
3288 * sata_link_resume - resume SATA link
3289 * @link: ATA link to resume SATA
3290 * @params: timing parameters { interval, duratinon, timeout } in msec
3291 * @deadline: deadline jiffies for the operation
3293 * Resume SATA phy @link and debounce it.
3296 * Kernel thread context (may sleep)
3299 * 0 on success, -errno on failure.
3301 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3302 unsigned long deadline
)
3307 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3310 scontrol
= (scontrol
& 0x0f0) | 0x300;
3312 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3315 /* Some PHYs react badly if SStatus is pounded immediately
3316 * after resuming. Delay 200ms before debouncing.
3320 return sata_link_debounce(link
, params
, deadline
);
3324 * ata_std_prereset - prepare for reset
3325 * @link: ATA link to be reset
3326 * @deadline: deadline jiffies for the operation
3328 * @link is about to be reset. Initialize it. Failure from
3329 * prereset makes libata abort whole reset sequence and give up
3330 * that port, so prereset should be best-effort. It does its
3331 * best to prepare for reset sequence but if things go wrong, it
3332 * should just whine, not fail.
3335 * Kernel thread context (may sleep)
3338 * 0 on success, -errno otherwise.
3340 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3342 struct ata_port
*ap
= link
->ap
;
3343 struct ata_eh_context
*ehc
= &link
->eh_context
;
3344 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3347 /* handle link resume */
3348 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3349 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3350 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3352 /* if we're about to do hardreset, nothing more to do */
3353 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3356 /* if SATA, resume link */
3357 if (ap
->flags
& ATA_FLAG_SATA
) {
3358 rc
= sata_link_resume(link
, timing
, deadline
);
3359 /* whine about phy resume failure but proceed */
3360 if (rc
&& rc
!= -EOPNOTSUPP
)
3361 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3362 "link for reset (errno=%d)\n", rc
);
3365 /* Wait for !BSY if the controller can wait for the first D2H
3366 * Reg FIS and we don't know that no device is attached.
3368 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3369 rc
= ata_wait_ready(ap
, deadline
);
3370 if (rc
&& rc
!= -ENODEV
) {
3371 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3372 "(errno=%d), forcing hardreset\n", rc
);
3373 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3381 * ata_std_softreset - reset host port via ATA SRST
3382 * @link: ATA link to reset
3383 * @classes: resulting classes of attached devices
3384 * @deadline: deadline jiffies for the operation
3386 * Reset host port using ATA SRST.
3389 * Kernel thread context (may sleep)
3392 * 0 on success, -errno otherwise.
3394 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3395 unsigned long deadline
)
3397 struct ata_port
*ap
= link
->ap
;
3398 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3399 unsigned int devmask
= 0;
3405 if (ata_link_offline(link
)) {
3406 classes
[0] = ATA_DEV_NONE
;
3410 /* determine if device 0/1 are present */
3411 if (ata_devchk(ap
, 0))
3412 devmask
|= (1 << 0);
3413 if (slave_possible
&& ata_devchk(ap
, 1))
3414 devmask
|= (1 << 1);
3416 /* select device 0 again */
3417 ap
->ops
->dev_select(ap
, 0);
3419 /* issue bus reset */
3420 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3421 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3422 /* if link is occupied, -ENODEV too is an error */
3423 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3424 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3428 /* determine by signature whether we have ATA or ATAPI devices */
3429 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3430 if (slave_possible
&& err
!= 0x81)
3431 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3434 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3439 * sata_link_hardreset - reset link via SATA phy reset
3440 * @link: link to reset
3441 * @timing: timing parameters { interval, duratinon, timeout } in msec
3442 * @deadline: deadline jiffies for the operation
3444 * SATA phy-reset @link using DET bits of SControl register.
3447 * Kernel thread context (may sleep)
3450 * 0 on success, -errno otherwise.
3452 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3453 unsigned long deadline
)
3460 if (sata_set_spd_needed(link
)) {
3461 /* SATA spec says nothing about how to reconfigure
3462 * spd. To be on the safe side, turn off phy during
3463 * reconfiguration. This works for at least ICH7 AHCI
3466 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3469 scontrol
= (scontrol
& 0x0f0) | 0x304;
3471 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3477 /* issue phy wake/reset */
3478 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3481 scontrol
= (scontrol
& 0x0f0) | 0x301;
3483 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3486 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3487 * 10.4.2 says at least 1 ms.
3491 /* bring link back */
3492 rc
= sata_link_resume(link
, timing
, deadline
);
3494 DPRINTK("EXIT, rc=%d\n", rc
);
3499 * sata_std_hardreset - reset host port via SATA phy reset
3500 * @link: link to reset
3501 * @class: resulting class of attached device
3502 * @deadline: deadline jiffies for the operation
3504 * SATA phy-reset host port using DET bits of SControl register,
3505 * wait for !BSY and classify the attached device.
3508 * Kernel thread context (may sleep)
3511 * 0 on success, -errno otherwise.
3513 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3514 unsigned long deadline
)
3516 struct ata_port
*ap
= link
->ap
;
3517 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3523 rc
= sata_link_hardreset(link
, timing
, deadline
);
3525 ata_link_printk(link
, KERN_ERR
,
3526 "COMRESET failed (errno=%d)\n", rc
);
3530 /* TODO: phy layer with polling, timeouts, etc. */
3531 if (ata_link_offline(link
)) {
3532 *class = ATA_DEV_NONE
;
3533 DPRINTK("EXIT, link offline\n");
3537 /* wait a while before checking status, see SRST for more info */
3540 rc
= ata_wait_ready(ap
, deadline
);
3541 /* link occupied, -ENODEV too is an error */
3543 ata_link_printk(link
, KERN_ERR
,
3544 "COMRESET failed (errno=%d)\n", rc
);
3548 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3550 *class = ata_dev_try_classify(ap
, 0, NULL
);
3552 DPRINTK("EXIT, class=%u\n", *class);
3557 * ata_std_postreset - standard postreset callback
3558 * @link: the target ata_link
3559 * @classes: classes of attached devices
3561 * This function is invoked after a successful reset. Note that
3562 * the device might have been reset more than once using
3563 * different reset methods before postreset is invoked.
3566 * Kernel thread context (may sleep)
3568 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3570 struct ata_port
*ap
= link
->ap
;
3575 /* print link status */
3576 sata_print_link_status(link
);
3579 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3580 sata_scr_write(link
, SCR_ERROR
, serror
);
3582 /* is double-select really necessary? */
3583 if (classes
[0] != ATA_DEV_NONE
)
3584 ap
->ops
->dev_select(ap
, 1);
3585 if (classes
[1] != ATA_DEV_NONE
)
3586 ap
->ops
->dev_select(ap
, 0);
3588 /* bail out if no device is present */
3589 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3590 DPRINTK("EXIT, no device\n");
3594 /* set up device control */
3595 if (ap
->ioaddr
.ctl_addr
)
3596 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3602 * ata_dev_same_device - Determine whether new ID matches configured device
3603 * @dev: device to compare against
3604 * @new_class: class of the new device
3605 * @new_id: IDENTIFY page of the new device
3607 * Compare @new_class and @new_id against @dev and determine
3608 * whether @dev is the device indicated by @new_class and
3615 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3617 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3620 const u16
*old_id
= dev
->id
;
3621 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3622 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3624 if (dev
->class != new_class
) {
3625 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3626 dev
->class, new_class
);
3630 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3631 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3632 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3633 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3635 if (strcmp(model
[0], model
[1])) {
3636 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3637 "'%s' != '%s'\n", model
[0], model
[1]);
3641 if (strcmp(serial
[0], serial
[1])) {
3642 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3643 "'%s' != '%s'\n", serial
[0], serial
[1]);
3651 * ata_dev_reread_id - Re-read IDENTIFY data
3652 * @dev: target ATA device
3653 * @readid_flags: read ID flags
3655 * Re-read IDENTIFY page and make sure @dev is still attached to
3659 * Kernel thread context (may sleep)
3662 * 0 on success, negative errno otherwise
3664 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3666 unsigned int class = dev
->class;
3667 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3671 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3675 /* is the device still there? */
3676 if (!ata_dev_same_device(dev
, class, id
))
3679 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3684 * ata_dev_revalidate - Revalidate ATA device
3685 * @dev: device to revalidate
3686 * @readid_flags: read ID flags
3688 * Re-read IDENTIFY page, make sure @dev is still attached to the
3689 * port and reconfigure it according to the new IDENTIFY page.
3692 * Kernel thread context (may sleep)
3695 * 0 on success, negative errno otherwise
3697 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3699 u64 n_sectors
= dev
->n_sectors
;
3702 if (!ata_dev_enabled(dev
))
3706 rc
= ata_dev_reread_id(dev
, readid_flags
);
3710 /* configure device according to the new ID */
3711 rc
= ata_dev_configure(dev
);
3715 /* verify n_sectors hasn't changed */
3716 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3717 dev
->n_sectors
!= n_sectors
) {
3718 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3720 (unsigned long long)n_sectors
,
3721 (unsigned long long)dev
->n_sectors
);
3723 /* restore original n_sectors */
3724 dev
->n_sectors
= n_sectors
;
3733 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3737 struct ata_blacklist_entry
{
3738 const char *model_num
;
3739 const char *model_rev
;
3740 unsigned long horkage
;
3743 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3744 /* Devices with DMA related problems under Linux */
3745 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3746 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3747 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3748 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3749 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3750 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3751 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3752 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3753 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3754 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3755 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3756 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3757 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3758 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3759 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3760 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3761 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3762 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3763 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3764 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3765 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3766 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3767 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3768 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3769 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3770 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3771 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3772 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3773 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3774 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3775 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3776 { "IOMEGA ZIP 250 ATAPI Floppy",
3777 NULL
, ATA_HORKAGE_NODMA
},
3779 /* Weird ATAPI devices */
3780 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3782 /* Devices we expect to fail diagnostics */
3784 /* Devices where NCQ should be avoided */
3786 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3787 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3788 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3790 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3791 { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ
},
3792 { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ
},
3793 { "Maxtor 7B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
, },
3794 { "Maxtor 7B300S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3795 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3796 { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
3797 ATA_HORKAGE_NONCQ
},
3798 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3799 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3800 /* Blacklist entries taken from Silicon Image 3124/3132
3801 Windows driver .inf file - also several Linux problem reports */
3802 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3803 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3804 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3805 /* Drives which do spurious command completion */
3806 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3807 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3808 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3809 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3810 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3811 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3812 { "ST3160812AS", "3.AD", ATA_HORKAGE_NONCQ
, },
3813 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3815 /* devices which puke on READ_NATIVE_MAX */
3816 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3817 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3818 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3819 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3825 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3827 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3828 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3829 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3831 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3832 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3834 while (ad
->model_num
) {
3835 if (!strcmp(ad
->model_num
, model_num
)) {
3836 if (ad
->model_rev
== NULL
)
3838 if (!strcmp(ad
->model_rev
, model_rev
))
3846 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3848 /* We don't support polling DMA.
3849 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3850 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3852 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3853 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3855 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
3859 * ata_dev_xfermask - Compute supported xfermask of the given device
3860 * @dev: Device to compute xfermask for
3862 * Compute supported xfermask of @dev and store it in
3863 * dev->*_mask. This function is responsible for applying all
3864 * known limits including host controller limits, device
3870 static void ata_dev_xfermask(struct ata_device
*dev
)
3872 struct ata_link
*link
= dev
->link
;
3873 struct ata_port
*ap
= link
->ap
;
3874 struct ata_host
*host
= ap
->host
;
3875 unsigned long xfer_mask
;
3877 /* controller modes available */
3878 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3879 ap
->mwdma_mask
, ap
->udma_mask
);
3881 /* drive modes available */
3882 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3883 dev
->mwdma_mask
, dev
->udma_mask
);
3884 xfer_mask
&= ata_id_xfermask(dev
->id
);
3887 * CFA Advanced TrueIDE timings are not allowed on a shared
3890 if (ata_dev_pair(dev
)) {
3891 /* No PIO5 or PIO6 */
3892 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3893 /* No MWDMA3 or MWDMA 4 */
3894 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3897 if (ata_dma_blacklisted(dev
)) {
3898 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3899 ata_dev_printk(dev
, KERN_WARNING
,
3900 "device is on DMA blacklist, disabling DMA\n");
3903 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3904 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3905 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3906 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3907 "other device, disabling DMA\n");
3910 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3911 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3913 if (ap
->ops
->mode_filter
)
3914 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3916 /* Apply cable rule here. Don't apply it early because when
3917 * we handle hot plug the cable type can itself change.
3918 * Check this last so that we know if the transfer rate was
3919 * solely limited by the cable.
3920 * Unknown or 80 wire cables reported host side are checked
3921 * drive side as well. Cases where we know a 40wire cable
3922 * is used safely for 80 are not checked here.
3924 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3925 /* UDMA/44 or higher would be available */
3926 if((ap
->cbl
== ATA_CBL_PATA40
) ||
3927 (ata_drive_40wire(dev
->id
) &&
3928 (ap
->cbl
== ATA_CBL_PATA_UNK
||
3929 ap
->cbl
== ATA_CBL_PATA80
))) {
3930 ata_dev_printk(dev
, KERN_WARNING
,
3931 "limited to UDMA/33 due to 40-wire cable\n");
3932 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3935 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3936 &dev
->mwdma_mask
, &dev
->udma_mask
);
3940 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3941 * @dev: Device to which command will be sent
3943 * Issue SET FEATURES - XFER MODE command to device @dev
3947 * PCI/etc. bus probe sem.
3950 * 0 on success, AC_ERR_* mask otherwise.
3953 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3955 struct ata_taskfile tf
;
3956 unsigned int err_mask
;
3958 /* set up set-features taskfile */
3959 DPRINTK("set features - xfer mode\n");
3961 /* Some controllers and ATAPI devices show flaky interrupt
3962 * behavior after setting xfer mode. Use polling instead.
3964 ata_tf_init(dev
, &tf
);
3965 tf
.command
= ATA_CMD_SET_FEATURES
;
3966 tf
.feature
= SETFEATURES_XFER
;
3967 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
3968 tf
.protocol
= ATA_PROT_NODATA
;
3969 tf
.nsect
= dev
->xfer_mode
;
3971 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3973 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3978 * ata_dev_init_params - Issue INIT DEV PARAMS command
3979 * @dev: Device to which command will be sent
3980 * @heads: Number of heads (taskfile parameter)
3981 * @sectors: Number of sectors (taskfile parameter)
3984 * Kernel thread context (may sleep)
3987 * 0 on success, AC_ERR_* mask otherwise.
3989 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3990 u16 heads
, u16 sectors
)
3992 struct ata_taskfile tf
;
3993 unsigned int err_mask
;
3995 /* Number of sectors per track 1-255. Number of heads 1-16 */
3996 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3997 return AC_ERR_INVALID
;
3999 /* set up init dev params taskfile */
4000 DPRINTK("init dev params \n");
4002 ata_tf_init(dev
, &tf
);
4003 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4004 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4005 tf
.protocol
= ATA_PROT_NODATA
;
4007 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4009 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4010 /* A clean abort indicates an original or just out of spec drive
4011 and we should continue as we issue the setup based on the
4012 drive reported working geometry */
4013 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4016 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4021 * ata_sg_clean - Unmap DMA memory associated with command
4022 * @qc: Command containing DMA memory to be released
4024 * Unmap all mapped DMA memory associated with this command.
4027 * spin_lock_irqsave(host lock)
4029 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4031 struct ata_port
*ap
= qc
->ap
;
4032 struct scatterlist
*sg
= qc
->__sg
;
4033 int dir
= qc
->dma_dir
;
4034 void *pad_buf
= NULL
;
4036 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4037 WARN_ON(sg
== NULL
);
4039 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4040 WARN_ON(qc
->n_elem
> 1);
4042 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4044 /* if we padded the buffer out to 32-bit bound, and data
4045 * xfer direction is from-device, we must copy from the
4046 * pad buffer back into the supplied buffer
4048 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4049 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4051 if (qc
->flags
& ATA_QCFLAG_SG
) {
4053 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4054 /* restore last sg */
4055 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4057 struct scatterlist
*psg
= &qc
->pad_sgent
;
4058 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4059 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4060 kunmap_atomic(addr
, KM_IRQ0
);
4064 dma_unmap_single(ap
->dev
,
4065 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4068 sg
->length
+= qc
->pad_len
;
4070 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4071 pad_buf
, qc
->pad_len
);
4074 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4079 * ata_fill_sg - Fill PCI IDE PRD table
4080 * @qc: Metadata associated with taskfile to be transferred
4082 * Fill PCI IDE PRD (scatter-gather) table with segments
4083 * associated with the current disk command.
4086 * spin_lock_irqsave(host lock)
4089 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4091 struct ata_port
*ap
= qc
->ap
;
4092 struct scatterlist
*sg
;
4095 WARN_ON(qc
->__sg
== NULL
);
4096 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4099 ata_for_each_sg(sg
, qc
) {
4103 /* determine if physical DMA addr spans 64K boundary.
4104 * Note h/w doesn't support 64-bit, so we unconditionally
4105 * truncate dma_addr_t to u32.
4107 addr
= (u32
) sg_dma_address(sg
);
4108 sg_len
= sg_dma_len(sg
);
4111 offset
= addr
& 0xffff;
4113 if ((offset
+ sg_len
) > 0x10000)
4114 len
= 0x10000 - offset
;
4116 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4117 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4118 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4127 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4131 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4132 * @qc: Metadata associated with taskfile to be transferred
4134 * Fill PCI IDE PRD (scatter-gather) table with segments
4135 * associated with the current disk command. Perform the fill
4136 * so that we avoid writing any length 64K records for
4137 * controllers that don't follow the spec.
4140 * spin_lock_irqsave(host lock)
4143 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4145 struct ata_port
*ap
= qc
->ap
;
4146 struct scatterlist
*sg
;
4149 WARN_ON(qc
->__sg
== NULL
);
4150 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4153 ata_for_each_sg(sg
, qc
) {
4155 u32 sg_len
, len
, blen
;
4157 /* determine if physical DMA addr spans 64K boundary.
4158 * Note h/w doesn't support 64-bit, so we unconditionally
4159 * truncate dma_addr_t to u32.
4161 addr
= (u32
) sg_dma_address(sg
);
4162 sg_len
= sg_dma_len(sg
);
4165 offset
= addr
& 0xffff;
4167 if ((offset
+ sg_len
) > 0x10000)
4168 len
= 0x10000 - offset
;
4170 blen
= len
& 0xffff;
4171 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4173 /* Some PATA chipsets like the CS5530 can't
4174 cope with 0x0000 meaning 64K as the spec says */
4175 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4177 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4179 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4180 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4189 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4193 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4194 * @qc: Metadata associated with taskfile to check
4196 * Allow low-level driver to filter ATA PACKET commands, returning
4197 * a status indicating whether or not it is OK to use DMA for the
4198 * supplied PACKET command.
4201 * spin_lock_irqsave(host lock)
4203 * RETURNS: 0 when ATAPI DMA can be used
4206 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4208 struct ata_port
*ap
= qc
->ap
;
4210 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4211 * few ATAPI devices choke on such DMA requests.
4213 if (unlikely(qc
->nbytes
& 15))
4216 if (ap
->ops
->check_atapi_dma
)
4217 return ap
->ops
->check_atapi_dma(qc
);
4223 * ata_qc_prep - Prepare taskfile for submission
4224 * @qc: Metadata associated with taskfile to be prepared
4226 * Prepare ATA taskfile for submission.
4229 * spin_lock_irqsave(host lock)
4231 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4233 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4240 * ata_dumb_qc_prep - Prepare taskfile for submission
4241 * @qc: Metadata associated with taskfile to be prepared
4243 * Prepare ATA taskfile for submission.
4246 * spin_lock_irqsave(host lock)
4248 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4250 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4253 ata_fill_sg_dumb(qc
);
4256 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4259 * ata_sg_init_one - Associate command with memory buffer
4260 * @qc: Command to be associated
4261 * @buf: Memory buffer
4262 * @buflen: Length of memory buffer, in bytes.
4264 * Initialize the data-related elements of queued_cmd @qc
4265 * to point to a single memory buffer, @buf of byte length @buflen.
4268 * spin_lock_irqsave(host lock)
4271 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4273 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4275 qc
->__sg
= &qc
->sgent
;
4277 qc
->orig_n_elem
= 1;
4279 qc
->nbytes
= buflen
;
4281 sg_init_one(&qc
->sgent
, buf
, buflen
);
4285 * ata_sg_init - Associate command with scatter-gather table.
4286 * @qc: Command to be associated
4287 * @sg: Scatter-gather table.
4288 * @n_elem: Number of elements in s/g table.
4290 * Initialize the data-related elements of queued_cmd @qc
4291 * to point to a scatter-gather table @sg, containing @n_elem
4295 * spin_lock_irqsave(host lock)
4298 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4299 unsigned int n_elem
)
4301 qc
->flags
|= ATA_QCFLAG_SG
;
4303 qc
->n_elem
= n_elem
;
4304 qc
->orig_n_elem
= n_elem
;
4308 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4309 * @qc: Command with memory buffer to be mapped.
4311 * DMA-map the memory buffer associated with queued_cmd @qc.
4314 * spin_lock_irqsave(host lock)
4317 * Zero on success, negative on error.
4320 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4322 struct ata_port
*ap
= qc
->ap
;
4323 int dir
= qc
->dma_dir
;
4324 struct scatterlist
*sg
= qc
->__sg
;
4325 dma_addr_t dma_address
;
4328 /* we must lengthen transfers to end on a 32-bit boundary */
4329 qc
->pad_len
= sg
->length
& 3;
4331 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4332 struct scatterlist
*psg
= &qc
->pad_sgent
;
4334 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4336 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4338 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4339 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4342 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4343 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4345 sg
->length
-= qc
->pad_len
;
4346 if (sg
->length
== 0)
4349 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4350 sg
->length
, qc
->pad_len
);
4358 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4360 if (dma_mapping_error(dma_address
)) {
4362 sg
->length
+= qc
->pad_len
;
4366 sg_dma_address(sg
) = dma_address
;
4367 sg_dma_len(sg
) = sg
->length
;
4370 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4371 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4377 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4378 * @qc: Command with scatter-gather table to be mapped.
4380 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4383 * spin_lock_irqsave(host lock)
4386 * Zero on success, negative on error.
4390 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4392 struct ata_port
*ap
= qc
->ap
;
4393 struct scatterlist
*sg
= qc
->__sg
;
4394 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4395 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4397 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4398 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4400 /* we must lengthen transfers to end on a 32-bit boundary */
4401 qc
->pad_len
= lsg
->length
& 3;
4403 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4404 struct scatterlist
*psg
= &qc
->pad_sgent
;
4405 unsigned int offset
;
4407 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4409 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4412 * psg->page/offset are used to copy to-be-written
4413 * data in this function or read data in ata_sg_clean.
4415 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4416 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4417 psg
->offset
= offset_in_page(offset
);
4419 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4420 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4421 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4422 kunmap_atomic(addr
, KM_IRQ0
);
4425 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4426 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4428 lsg
->length
-= qc
->pad_len
;
4429 if (lsg
->length
== 0)
4432 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4433 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4436 pre_n_elem
= qc
->n_elem
;
4437 if (trim_sg
&& pre_n_elem
)
4446 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4448 /* restore last sg */
4449 lsg
->length
+= qc
->pad_len
;
4453 DPRINTK("%d sg elements mapped\n", n_elem
);
4456 qc
->n_elem
= n_elem
;
4462 * swap_buf_le16 - swap halves of 16-bit words in place
4463 * @buf: Buffer to swap
4464 * @buf_words: Number of 16-bit words in buffer.
4466 * Swap halves of 16-bit words if needed to convert from
4467 * little-endian byte order to native cpu byte order, or
4471 * Inherited from caller.
4473 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4478 for (i
= 0; i
< buf_words
; i
++)
4479 buf
[i
] = le16_to_cpu(buf
[i
]);
4480 #endif /* __BIG_ENDIAN */
4484 * ata_data_xfer - Transfer data by PIO
4485 * @adev: device to target
4487 * @buflen: buffer length
4488 * @write_data: read/write
4490 * Transfer data from/to the device data register by PIO.
4493 * Inherited from caller.
4495 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4496 unsigned int buflen
, int write_data
)
4498 struct ata_port
*ap
= adev
->link
->ap
;
4499 unsigned int words
= buflen
>> 1;
4501 /* Transfer multiple of 2 bytes */
4503 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4505 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4507 /* Transfer trailing 1 byte, if any. */
4508 if (unlikely(buflen
& 0x01)) {
4509 u16 align_buf
[1] = { 0 };
4510 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4513 memcpy(align_buf
, trailing_buf
, 1);
4514 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4516 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4517 memcpy(trailing_buf
, align_buf
, 1);
4523 * ata_data_xfer_noirq - Transfer data by PIO
4524 * @adev: device to target
4526 * @buflen: buffer length
4527 * @write_data: read/write
4529 * Transfer data from/to the device data register by PIO. Do the
4530 * transfer with interrupts disabled.
4533 * Inherited from caller.
4535 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4536 unsigned int buflen
, int write_data
)
4538 unsigned long flags
;
4539 local_irq_save(flags
);
4540 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4541 local_irq_restore(flags
);
4546 * ata_pio_sector - Transfer a sector of data.
4547 * @qc: Command on going
4549 * Transfer qc->sect_size bytes of data from/to the ATA device.
4552 * Inherited from caller.
4555 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4557 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4558 struct scatterlist
*sg
= qc
->__sg
;
4559 struct ata_port
*ap
= qc
->ap
;
4561 unsigned int offset
;
4564 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4565 ap
->hsm_task_state
= HSM_ST_LAST
;
4567 page
= sg
[qc
->cursg
].page
;
4568 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4570 /* get the current page and offset */
4571 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4572 offset
%= PAGE_SIZE
;
4574 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4576 if (PageHighMem(page
)) {
4577 unsigned long flags
;
4579 /* FIXME: use a bounce buffer */
4580 local_irq_save(flags
);
4581 buf
= kmap_atomic(page
, KM_IRQ0
);
4583 /* do the actual data transfer */
4584 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4586 kunmap_atomic(buf
, KM_IRQ0
);
4587 local_irq_restore(flags
);
4589 buf
= page_address(page
);
4590 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4593 qc
->curbytes
+= qc
->sect_size
;
4594 qc
->cursg_ofs
+= qc
->sect_size
;
4596 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4603 * ata_pio_sectors - Transfer one or many sectors.
4604 * @qc: Command on going
4606 * Transfer one or many sectors of data from/to the
4607 * ATA device for the DRQ request.
4610 * Inherited from caller.
4613 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4615 if (is_multi_taskfile(&qc
->tf
)) {
4616 /* READ/WRITE MULTIPLE */
4619 WARN_ON(qc
->dev
->multi_count
== 0);
4621 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4622 qc
->dev
->multi_count
);
4628 ata_altstatus(qc
->ap
); /* flush */
4632 * atapi_send_cdb - Write CDB bytes to hardware
4633 * @ap: Port to which ATAPI device is attached.
4634 * @qc: Taskfile currently active
4636 * When device has indicated its readiness to accept
4637 * a CDB, this function is called. Send the CDB.
4643 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4646 DPRINTK("send cdb\n");
4647 WARN_ON(qc
->dev
->cdb_len
< 12);
4649 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4650 ata_altstatus(ap
); /* flush */
4652 switch (qc
->tf
.protocol
) {
4653 case ATA_PROT_ATAPI
:
4654 ap
->hsm_task_state
= HSM_ST
;
4656 case ATA_PROT_ATAPI_NODATA
:
4657 ap
->hsm_task_state
= HSM_ST_LAST
;
4659 case ATA_PROT_ATAPI_DMA
:
4660 ap
->hsm_task_state
= HSM_ST_LAST
;
4661 /* initiate bmdma */
4662 ap
->ops
->bmdma_start(qc
);
4668 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4669 * @qc: Command on going
4670 * @bytes: number of bytes
4672 * Transfer Transfer data from/to the ATAPI device.
4675 * Inherited from caller.
4679 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4681 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4682 struct scatterlist
*sg
= qc
->__sg
;
4683 struct ata_port
*ap
= qc
->ap
;
4686 unsigned int offset
, count
;
4688 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4689 ap
->hsm_task_state
= HSM_ST_LAST
;
4692 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4694 * The end of qc->sg is reached and the device expects
4695 * more data to transfer. In order not to overrun qc->sg
4696 * and fulfill length specified in the byte count register,
4697 * - for read case, discard trailing data from the device
4698 * - for write case, padding zero data to the device
4700 u16 pad_buf
[1] = { 0 };
4701 unsigned int words
= bytes
>> 1;
4704 if (words
) /* warning if bytes > 1 */
4705 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4706 "%u bytes trailing data\n", bytes
);
4708 for (i
= 0; i
< words
; i
++)
4709 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4711 ap
->hsm_task_state
= HSM_ST_LAST
;
4715 sg
= &qc
->__sg
[qc
->cursg
];
4718 offset
= sg
->offset
+ qc
->cursg_ofs
;
4720 /* get the current page and offset */
4721 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4722 offset
%= PAGE_SIZE
;
4724 /* don't overrun current sg */
4725 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4727 /* don't cross page boundaries */
4728 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4730 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4732 if (PageHighMem(page
)) {
4733 unsigned long flags
;
4735 /* FIXME: use bounce buffer */
4736 local_irq_save(flags
);
4737 buf
= kmap_atomic(page
, KM_IRQ0
);
4739 /* do the actual data transfer */
4740 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4742 kunmap_atomic(buf
, KM_IRQ0
);
4743 local_irq_restore(flags
);
4745 buf
= page_address(page
);
4746 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4750 qc
->curbytes
+= count
;
4751 qc
->cursg_ofs
+= count
;
4753 if (qc
->cursg_ofs
== sg
->length
) {
4763 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4764 * @qc: Command on going
4766 * Transfer Transfer data from/to the ATAPI device.
4769 * Inherited from caller.
4772 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4774 struct ata_port
*ap
= qc
->ap
;
4775 struct ata_device
*dev
= qc
->dev
;
4776 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4777 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4779 /* Abuse qc->result_tf for temp storage of intermediate TF
4780 * here to save some kernel stack usage.
4781 * For normal completion, qc->result_tf is not relevant. For
4782 * error, qc->result_tf is later overwritten by ata_qc_complete().
4783 * So, the correctness of qc->result_tf is not affected.
4785 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4786 ireason
= qc
->result_tf
.nsect
;
4787 bc_lo
= qc
->result_tf
.lbam
;
4788 bc_hi
= qc
->result_tf
.lbah
;
4789 bytes
= (bc_hi
<< 8) | bc_lo
;
4791 /* shall be cleared to zero, indicating xfer of data */
4792 if (ireason
& (1 << 0))
4795 /* make sure transfer direction matches expected */
4796 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4797 if (do_write
!= i_write
)
4800 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4802 __atapi_pio_bytes(qc
, bytes
);
4803 ata_altstatus(ap
); /* flush */
4808 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4809 qc
->err_mask
|= AC_ERR_HSM
;
4810 ap
->hsm_task_state
= HSM_ST_ERR
;
4814 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4815 * @ap: the target ata_port
4819 * 1 if ok in workqueue, 0 otherwise.
4822 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4824 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4827 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4828 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4829 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4832 if (is_atapi_taskfile(&qc
->tf
) &&
4833 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4841 * ata_hsm_qc_complete - finish a qc running on standard HSM
4842 * @qc: Command to complete
4843 * @in_wq: 1 if called from workqueue, 0 otherwise
4845 * Finish @qc which is running on standard HSM.
4848 * If @in_wq is zero, spin_lock_irqsave(host lock).
4849 * Otherwise, none on entry and grabs host lock.
4851 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4853 struct ata_port
*ap
= qc
->ap
;
4854 unsigned long flags
;
4856 if (ap
->ops
->error_handler
) {
4858 spin_lock_irqsave(ap
->lock
, flags
);
4860 /* EH might have kicked in while host lock is
4863 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4865 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4866 ap
->ops
->irq_on(ap
);
4867 ata_qc_complete(qc
);
4869 ata_port_freeze(ap
);
4872 spin_unlock_irqrestore(ap
->lock
, flags
);
4874 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4875 ata_qc_complete(qc
);
4877 ata_port_freeze(ap
);
4881 spin_lock_irqsave(ap
->lock
, flags
);
4882 ap
->ops
->irq_on(ap
);
4883 ata_qc_complete(qc
);
4884 spin_unlock_irqrestore(ap
->lock
, flags
);
4886 ata_qc_complete(qc
);
4891 * ata_hsm_move - move the HSM to the next state.
4892 * @ap: the target ata_port
4894 * @status: current device status
4895 * @in_wq: 1 if called from workqueue, 0 otherwise
4898 * 1 when poll next status needed, 0 otherwise.
4900 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4901 u8 status
, int in_wq
)
4903 unsigned long flags
= 0;
4906 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4908 /* Make sure ata_qc_issue_prot() does not throw things
4909 * like DMA polling into the workqueue. Notice that
4910 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4912 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4915 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4916 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4918 switch (ap
->hsm_task_state
) {
4920 /* Send first data block or PACKET CDB */
4922 /* If polling, we will stay in the work queue after
4923 * sending the data. Otherwise, interrupt handler
4924 * takes over after sending the data.
4926 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4928 /* check device status */
4929 if (unlikely((status
& ATA_DRQ
) == 0)) {
4930 /* handle BSY=0, DRQ=0 as error */
4931 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4932 /* device stops HSM for abort/error */
4933 qc
->err_mask
|= AC_ERR_DEV
;
4935 /* HSM violation. Let EH handle this */
4936 qc
->err_mask
|= AC_ERR_HSM
;
4938 ap
->hsm_task_state
= HSM_ST_ERR
;
4942 /* Device should not ask for data transfer (DRQ=1)
4943 * when it finds something wrong.
4944 * We ignore DRQ here and stop the HSM by
4945 * changing hsm_task_state to HSM_ST_ERR and
4946 * let the EH abort the command or reset the device.
4948 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4949 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4950 "error, dev_stat 0x%X\n", status
);
4951 qc
->err_mask
|= AC_ERR_HSM
;
4952 ap
->hsm_task_state
= HSM_ST_ERR
;
4956 /* Send the CDB (atapi) or the first data block (ata pio out).
4957 * During the state transition, interrupt handler shouldn't
4958 * be invoked before the data transfer is complete and
4959 * hsm_task_state is changed. Hence, the following locking.
4962 spin_lock_irqsave(ap
->lock
, flags
);
4964 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4965 /* PIO data out protocol.
4966 * send first data block.
4969 /* ata_pio_sectors() might change the state
4970 * to HSM_ST_LAST. so, the state is changed here
4971 * before ata_pio_sectors().
4973 ap
->hsm_task_state
= HSM_ST
;
4974 ata_pio_sectors(qc
);
4977 atapi_send_cdb(ap
, qc
);
4980 spin_unlock_irqrestore(ap
->lock
, flags
);
4982 /* if polling, ata_pio_task() handles the rest.
4983 * otherwise, interrupt handler takes over from here.
4988 /* complete command or read/write the data register */
4989 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4990 /* ATAPI PIO protocol */
4991 if ((status
& ATA_DRQ
) == 0) {
4992 /* No more data to transfer or device error.
4993 * Device error will be tagged in HSM_ST_LAST.
4995 ap
->hsm_task_state
= HSM_ST_LAST
;
4999 /* Device should not ask for data transfer (DRQ=1)
5000 * when it finds something wrong.
5001 * We ignore DRQ here and stop the HSM by
5002 * changing hsm_task_state to HSM_ST_ERR and
5003 * let the EH abort the command or reset the device.
5005 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5006 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5007 "device error, dev_stat 0x%X\n",
5009 qc
->err_mask
|= AC_ERR_HSM
;
5010 ap
->hsm_task_state
= HSM_ST_ERR
;
5014 atapi_pio_bytes(qc
);
5016 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5017 /* bad ireason reported by device */
5021 /* ATA PIO protocol */
5022 if (unlikely((status
& ATA_DRQ
) == 0)) {
5023 /* handle BSY=0, DRQ=0 as error */
5024 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5025 /* device stops HSM for abort/error */
5026 qc
->err_mask
|= AC_ERR_DEV
;
5028 /* HSM violation. Let EH handle this.
5029 * Phantom devices also trigger this
5030 * condition. Mark hint.
5032 qc
->err_mask
|= AC_ERR_HSM
|
5035 ap
->hsm_task_state
= HSM_ST_ERR
;
5039 /* For PIO reads, some devices may ask for
5040 * data transfer (DRQ=1) alone with ERR=1.
5041 * We respect DRQ here and transfer one
5042 * block of junk data before changing the
5043 * hsm_task_state to HSM_ST_ERR.
5045 * For PIO writes, ERR=1 DRQ=1 doesn't make
5046 * sense since the data block has been
5047 * transferred to the device.
5049 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5050 /* data might be corrputed */
5051 qc
->err_mask
|= AC_ERR_DEV
;
5053 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5054 ata_pio_sectors(qc
);
5055 status
= ata_wait_idle(ap
);
5058 if (status
& (ATA_BUSY
| ATA_DRQ
))
5059 qc
->err_mask
|= AC_ERR_HSM
;
5061 /* ata_pio_sectors() might change the
5062 * state to HSM_ST_LAST. so, the state
5063 * is changed after ata_pio_sectors().
5065 ap
->hsm_task_state
= HSM_ST_ERR
;
5069 ata_pio_sectors(qc
);
5071 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5072 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5074 status
= ata_wait_idle(ap
);
5083 if (unlikely(!ata_ok(status
))) {
5084 qc
->err_mask
|= __ac_err_mask(status
);
5085 ap
->hsm_task_state
= HSM_ST_ERR
;
5089 /* no more data to transfer */
5090 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5091 ap
->print_id
, qc
->dev
->devno
, status
);
5093 WARN_ON(qc
->err_mask
);
5095 ap
->hsm_task_state
= HSM_ST_IDLE
;
5097 /* complete taskfile transaction */
5098 ata_hsm_qc_complete(qc
, in_wq
);
5104 /* make sure qc->err_mask is available to
5105 * know what's wrong and recover
5107 WARN_ON(qc
->err_mask
== 0);
5109 ap
->hsm_task_state
= HSM_ST_IDLE
;
5111 /* complete taskfile transaction */
5112 ata_hsm_qc_complete(qc
, in_wq
);
5124 static void ata_pio_task(struct work_struct
*work
)
5126 struct ata_port
*ap
=
5127 container_of(work
, struct ata_port
, port_task
.work
);
5128 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5133 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5136 * This is purely heuristic. This is a fast path.
5137 * Sometimes when we enter, BSY will be cleared in
5138 * a chk-status or two. If not, the drive is probably seeking
5139 * or something. Snooze for a couple msecs, then
5140 * chk-status again. If still busy, queue delayed work.
5142 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5143 if (status
& ATA_BUSY
) {
5145 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5146 if (status
& ATA_BUSY
) {
5147 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5153 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5155 /* another command or interrupt handler
5156 * may be running at this point.
5163 * ata_qc_new - Request an available ATA command, for queueing
5164 * @ap: Port associated with device @dev
5165 * @dev: Device from whom we request an available command structure
5171 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5173 struct ata_queued_cmd
*qc
= NULL
;
5176 /* no command while frozen */
5177 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5180 /* the last tag is reserved for internal command. */
5181 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5182 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5183 qc
= __ata_qc_from_tag(ap
, i
);
5194 * ata_qc_new_init - Request an available ATA command, and initialize it
5195 * @dev: Device from whom we request an available command structure
5201 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5203 struct ata_port
*ap
= dev
->link
->ap
;
5204 struct ata_queued_cmd
*qc
;
5206 qc
= ata_qc_new(ap
);
5219 * ata_qc_free - free unused ata_queued_cmd
5220 * @qc: Command to complete
5222 * Designed to free unused ata_queued_cmd object
5223 * in case something prevents using it.
5226 * spin_lock_irqsave(host lock)
5228 void ata_qc_free(struct ata_queued_cmd
*qc
)
5230 struct ata_port
*ap
= qc
->ap
;
5233 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5237 if (likely(ata_tag_valid(tag
))) {
5238 qc
->tag
= ATA_TAG_POISON
;
5239 clear_bit(tag
, &ap
->qc_allocated
);
5243 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5245 struct ata_port
*ap
= qc
->ap
;
5246 struct ata_link
*link
= qc
->dev
->link
;
5248 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5249 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5251 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5254 /* command should be marked inactive atomically with qc completion */
5255 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
5256 link
->sactive
&= ~(1 << qc
->tag
);
5258 link
->active_tag
= ATA_TAG_POISON
;
5260 /* atapi: mark qc as inactive to prevent the interrupt handler
5261 * from completing the command twice later, before the error handler
5262 * is called. (when rc != 0 and atapi request sense is needed)
5264 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5265 ap
->qc_active
&= ~(1 << qc
->tag
);
5267 /* call completion callback */
5268 qc
->complete_fn(qc
);
5271 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5273 struct ata_port
*ap
= qc
->ap
;
5275 qc
->result_tf
.flags
= qc
->tf
.flags
;
5276 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5280 * ata_qc_complete - Complete an active ATA command
5281 * @qc: Command to complete
5282 * @err_mask: ATA Status register contents
5284 * Indicate to the mid and upper layers that an ATA
5285 * command has completed, with either an ok or not-ok status.
5288 * spin_lock_irqsave(host lock)
5290 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5292 struct ata_port
*ap
= qc
->ap
;
5294 /* XXX: New EH and old EH use different mechanisms to
5295 * synchronize EH with regular execution path.
5297 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5298 * Normal execution path is responsible for not accessing a
5299 * failed qc. libata core enforces the rule by returning NULL
5300 * from ata_qc_from_tag() for failed qcs.
5302 * Old EH depends on ata_qc_complete() nullifying completion
5303 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5304 * not synchronize with interrupt handler. Only PIO task is
5307 if (ap
->ops
->error_handler
) {
5308 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5310 if (unlikely(qc
->err_mask
))
5311 qc
->flags
|= ATA_QCFLAG_FAILED
;
5313 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5314 if (!ata_tag_internal(qc
->tag
)) {
5315 /* always fill result TF for failed qc */
5317 ata_qc_schedule_eh(qc
);
5322 /* read result TF if requested */
5323 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5326 __ata_qc_complete(qc
);
5328 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5331 /* read result TF if failed or requested */
5332 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5335 __ata_qc_complete(qc
);
5340 * ata_qc_complete_multiple - Complete multiple qcs successfully
5341 * @ap: port in question
5342 * @qc_active: new qc_active mask
5343 * @finish_qc: LLDD callback invoked before completing a qc
5345 * Complete in-flight commands. This functions is meant to be
5346 * called from low-level driver's interrupt routine to complete
5347 * requests normally. ap->qc_active and @qc_active is compared
5348 * and commands are completed accordingly.
5351 * spin_lock_irqsave(host lock)
5354 * Number of completed commands on success, -errno otherwise.
5356 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5357 void (*finish_qc
)(struct ata_queued_cmd
*))
5363 done_mask
= ap
->qc_active
^ qc_active
;
5365 if (unlikely(done_mask
& qc_active
)) {
5366 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5367 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5371 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5372 struct ata_queued_cmd
*qc
;
5374 if (!(done_mask
& (1 << i
)))
5377 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5380 ata_qc_complete(qc
);
5388 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5390 struct ata_port
*ap
= qc
->ap
;
5392 switch (qc
->tf
.protocol
) {
5395 case ATA_PROT_ATAPI_DMA
:
5398 case ATA_PROT_ATAPI
:
5400 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5413 * ata_qc_issue - issue taskfile to device
5414 * @qc: command to issue to device
5416 * Prepare an ATA command to submission to device.
5417 * This includes mapping the data into a DMA-able
5418 * area, filling in the S/G table, and finally
5419 * writing the taskfile to hardware, starting the command.
5422 * spin_lock_irqsave(host lock)
5424 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5426 struct ata_port
*ap
= qc
->ap
;
5427 struct ata_link
*link
= qc
->dev
->link
;
5429 /* Make sure only one non-NCQ command is outstanding. The
5430 * check is skipped for old EH because it reuses active qc to
5431 * request ATAPI sense.
5433 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5435 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5436 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5437 link
->sactive
|= 1 << qc
->tag
;
5439 WARN_ON(link
->sactive
);
5440 link
->active_tag
= qc
->tag
;
5443 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5444 ap
->qc_active
|= 1 << qc
->tag
;
5446 if (ata_should_dma_map(qc
)) {
5447 if (qc
->flags
& ATA_QCFLAG_SG
) {
5448 if (ata_sg_setup(qc
))
5450 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5451 if (ata_sg_setup_one(qc
))
5455 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5458 ap
->ops
->qc_prep(qc
);
5460 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5461 if (unlikely(qc
->err_mask
))
5466 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5467 qc
->err_mask
|= AC_ERR_SYSTEM
;
5469 ata_qc_complete(qc
);
5473 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5474 * @qc: command to issue to device
5476 * Using various libata functions and hooks, this function
5477 * starts an ATA command. ATA commands are grouped into
5478 * classes called "protocols", and issuing each type of protocol
5479 * is slightly different.
5481 * May be used as the qc_issue() entry in ata_port_operations.
5484 * spin_lock_irqsave(host lock)
5487 * Zero on success, AC_ERR_* mask on failure
5490 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5492 struct ata_port
*ap
= qc
->ap
;
5494 /* Use polling pio if the LLD doesn't handle
5495 * interrupt driven pio and atapi CDB interrupt.
5497 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5498 switch (qc
->tf
.protocol
) {
5500 case ATA_PROT_NODATA
:
5501 case ATA_PROT_ATAPI
:
5502 case ATA_PROT_ATAPI_NODATA
:
5503 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5505 case ATA_PROT_ATAPI_DMA
:
5506 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5507 /* see ata_dma_blacklisted() */
5515 /* select the device */
5516 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5518 /* start the command */
5519 switch (qc
->tf
.protocol
) {
5520 case ATA_PROT_NODATA
:
5521 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5522 ata_qc_set_polling(qc
);
5524 ata_tf_to_host(ap
, &qc
->tf
);
5525 ap
->hsm_task_state
= HSM_ST_LAST
;
5527 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5528 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5533 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5535 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5536 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5537 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5538 ap
->hsm_task_state
= HSM_ST_LAST
;
5542 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5543 ata_qc_set_polling(qc
);
5545 ata_tf_to_host(ap
, &qc
->tf
);
5547 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5548 /* PIO data out protocol */
5549 ap
->hsm_task_state
= HSM_ST_FIRST
;
5550 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5552 /* always send first data block using
5553 * the ata_pio_task() codepath.
5556 /* PIO data in protocol */
5557 ap
->hsm_task_state
= HSM_ST
;
5559 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5560 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5562 /* if polling, ata_pio_task() handles the rest.
5563 * otherwise, interrupt handler takes over from here.
5569 case ATA_PROT_ATAPI
:
5570 case ATA_PROT_ATAPI_NODATA
:
5571 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5572 ata_qc_set_polling(qc
);
5574 ata_tf_to_host(ap
, &qc
->tf
);
5576 ap
->hsm_task_state
= HSM_ST_FIRST
;
5578 /* send cdb by polling if no cdb interrupt */
5579 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5580 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5581 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5584 case ATA_PROT_ATAPI_DMA
:
5585 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5587 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5588 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5589 ap
->hsm_task_state
= HSM_ST_FIRST
;
5591 /* send cdb by polling if no cdb interrupt */
5592 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5593 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5598 return AC_ERR_SYSTEM
;
5605 * ata_host_intr - Handle host interrupt for given (port, task)
5606 * @ap: Port on which interrupt arrived (possibly...)
5607 * @qc: Taskfile currently active in engine
5609 * Handle host interrupt for given queued command. Currently,
5610 * only DMA interrupts are handled. All other commands are
5611 * handled via polling with interrupts disabled (nIEN bit).
5614 * spin_lock_irqsave(host lock)
5617 * One if interrupt was handled, zero if not (shared irq).
5620 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5621 struct ata_queued_cmd
*qc
)
5623 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5624 u8 status
, host_stat
= 0;
5626 VPRINTK("ata%u: protocol %d task_state %d\n",
5627 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5629 /* Check whether we are expecting interrupt in this state */
5630 switch (ap
->hsm_task_state
) {
5632 /* Some pre-ATAPI-4 devices assert INTRQ
5633 * at this state when ready to receive CDB.
5636 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5637 * The flag was turned on only for atapi devices.
5638 * No need to check is_atapi_taskfile(&qc->tf) again.
5640 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5644 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5645 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5646 /* check status of DMA engine */
5647 host_stat
= ap
->ops
->bmdma_status(ap
);
5648 VPRINTK("ata%u: host_stat 0x%X\n",
5649 ap
->print_id
, host_stat
);
5651 /* if it's not our irq... */
5652 if (!(host_stat
& ATA_DMA_INTR
))
5655 /* before we do anything else, clear DMA-Start bit */
5656 ap
->ops
->bmdma_stop(qc
);
5658 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5659 /* error when transfering data to/from memory */
5660 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5661 ap
->hsm_task_state
= HSM_ST_ERR
;
5671 /* check altstatus */
5672 status
= ata_altstatus(ap
);
5673 if (status
& ATA_BUSY
)
5676 /* check main status, clearing INTRQ */
5677 status
= ata_chk_status(ap
);
5678 if (unlikely(status
& ATA_BUSY
))
5681 /* ack bmdma irq events */
5682 ap
->ops
->irq_clear(ap
);
5684 ata_hsm_move(ap
, qc
, status
, 0);
5686 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5687 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5688 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5690 return 1; /* irq handled */
5693 ap
->stats
.idle_irq
++;
5696 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5697 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5698 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5702 return 0; /* irq not handled */
5706 * ata_interrupt - Default ATA host interrupt handler
5707 * @irq: irq line (unused)
5708 * @dev_instance: pointer to our ata_host information structure
5710 * Default interrupt handler for PCI IDE devices. Calls
5711 * ata_host_intr() for each port that is not disabled.
5714 * Obtains host lock during operation.
5717 * IRQ_NONE or IRQ_HANDLED.
5720 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5722 struct ata_host
*host
= dev_instance
;
5724 unsigned int handled
= 0;
5725 unsigned long flags
;
5727 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5728 spin_lock_irqsave(&host
->lock
, flags
);
5730 for (i
= 0; i
< host
->n_ports
; i
++) {
5731 struct ata_port
*ap
;
5733 ap
= host
->ports
[i
];
5735 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5736 struct ata_queued_cmd
*qc
;
5738 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
5739 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5740 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5741 handled
|= ata_host_intr(ap
, qc
);
5745 spin_unlock_irqrestore(&host
->lock
, flags
);
5747 return IRQ_RETVAL(handled
);
5751 * sata_scr_valid - test whether SCRs are accessible
5752 * @link: ATA link to test SCR accessibility for
5754 * Test whether SCRs are accessible for @link.
5760 * 1 if SCRs are accessible, 0 otherwise.
5762 int sata_scr_valid(struct ata_link
*link
)
5764 struct ata_port
*ap
= link
->ap
;
5766 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5770 * sata_scr_read - read SCR register of the specified port
5771 * @link: ATA link to read SCR for
5773 * @val: Place to store read value
5775 * Read SCR register @reg of @link into *@val. This function is
5776 * guaranteed to succeed if the cable type of the port is SATA
5777 * and the port implements ->scr_read.
5783 * 0 on success, negative errno on failure.
5785 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5787 struct ata_port
*ap
= link
->ap
;
5789 if (sata_scr_valid(link
))
5790 return ap
->ops
->scr_read(ap
, reg
, val
);
5795 * sata_scr_write - write SCR register of the specified port
5796 * @link: ATA link to write SCR for
5797 * @reg: SCR to write
5798 * @val: value to write
5800 * Write @val to SCR register @reg of @link. This function is
5801 * guaranteed to succeed if the cable type of the port is SATA
5802 * and the port implements ->scr_read.
5808 * 0 on success, negative errno on failure.
5810 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5812 struct ata_port
*ap
= link
->ap
;
5814 if (sata_scr_valid(link
))
5815 return ap
->ops
->scr_write(ap
, reg
, val
);
5820 * sata_scr_write_flush - write SCR register of the specified port and flush
5821 * @link: ATA link to write SCR for
5822 * @reg: SCR to write
5823 * @val: value to write
5825 * This function is identical to sata_scr_write() except that this
5826 * function performs flush after writing to the register.
5832 * 0 on success, negative errno on failure.
5834 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5836 struct ata_port
*ap
= link
->ap
;
5839 if (sata_scr_valid(link
)) {
5840 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
5842 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
5849 * ata_link_online - test whether the given link is online
5850 * @link: ATA link to test
5852 * Test whether @link is online. Note that this function returns
5853 * 0 if online status of @link cannot be obtained, so
5854 * ata_link_online(link) != !ata_link_offline(link).
5860 * 1 if the port online status is available and online.
5862 int ata_link_online(struct ata_link
*link
)
5866 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5867 (sstatus
& 0xf) == 0x3)
5873 * ata_link_offline - test whether the given link is offline
5874 * @link: ATA link to test
5876 * Test whether @link is offline. Note that this function
5877 * returns 0 if offline status of @link cannot be obtained, so
5878 * ata_link_online(link) != !ata_link_offline(link).
5884 * 1 if the port offline status is available and offline.
5886 int ata_link_offline(struct ata_link
*link
)
5890 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5891 (sstatus
& 0xf) != 0x3)
5896 int ata_flush_cache(struct ata_device
*dev
)
5898 unsigned int err_mask
;
5901 if (!ata_try_flush_cache(dev
))
5904 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5905 cmd
= ATA_CMD_FLUSH_EXT
;
5907 cmd
= ATA_CMD_FLUSH
;
5909 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5911 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5919 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5920 unsigned int action
, unsigned int ehi_flags
,
5923 unsigned long flags
;
5926 for (i
= 0; i
< host
->n_ports
; i
++) {
5927 struct ata_port
*ap
= host
->ports
[i
];
5928 struct ata_link
*link
;
5930 /* Previous resume operation might still be in
5931 * progress. Wait for PM_PENDING to clear.
5933 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5934 ata_port_wait_eh(ap
);
5935 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5938 /* request PM ops to EH */
5939 spin_lock_irqsave(ap
->lock
, flags
);
5944 ap
->pm_result
= &rc
;
5947 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5948 __ata_port_for_each_link(link
, ap
) {
5949 link
->eh_info
.action
|= action
;
5950 link
->eh_info
.flags
|= ehi_flags
;
5953 ata_port_schedule_eh(ap
);
5955 spin_unlock_irqrestore(ap
->lock
, flags
);
5957 /* wait and check result */
5959 ata_port_wait_eh(ap
);
5960 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5970 * ata_host_suspend - suspend host
5971 * @host: host to suspend
5974 * Suspend @host. Actual operation is performed by EH. This
5975 * function requests EH to perform PM operations and waits for EH
5979 * Kernel thread context (may sleep).
5982 * 0 on success, -errno on failure.
5984 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5988 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5990 host
->dev
->power
.power_state
= mesg
;
5995 * ata_host_resume - resume host
5996 * @host: host to resume
5998 * Resume @host. Actual operation is performed by EH. This
5999 * function requests EH to perform PM operations and returns.
6000 * Note that all resume operations are performed parallely.
6003 * Kernel thread context (may sleep).
6005 void ata_host_resume(struct ata_host
*host
)
6007 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6008 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6009 host
->dev
->power
.power_state
= PMSG_ON
;
6014 * ata_port_start - Set port up for dma.
6015 * @ap: Port to initialize
6017 * Called just after data structures for each port are
6018 * initialized. Allocates space for PRD table.
6020 * May be used as the port_start() entry in ata_port_operations.
6023 * Inherited from caller.
6025 int ata_port_start(struct ata_port
*ap
)
6027 struct device
*dev
= ap
->dev
;
6030 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6035 rc
= ata_pad_alloc(ap
, dev
);
6039 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6040 (unsigned long long)ap
->prd_dma
);
6045 * ata_dev_init - Initialize an ata_device structure
6046 * @dev: Device structure to initialize
6048 * Initialize @dev in preparation for probing.
6051 * Inherited from caller.
6053 void ata_dev_init(struct ata_device
*dev
)
6055 struct ata_link
*link
= dev
->link
;
6056 struct ata_port
*ap
= link
->ap
;
6057 unsigned long flags
;
6059 /* SATA spd limit is bound to the first device */
6060 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6063 /* High bits of dev->flags are used to record warm plug
6064 * requests which occur asynchronously. Synchronize using
6067 spin_lock_irqsave(ap
->lock
, flags
);
6068 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6070 spin_unlock_irqrestore(ap
->lock
, flags
);
6072 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6073 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6074 dev
->pio_mask
= UINT_MAX
;
6075 dev
->mwdma_mask
= UINT_MAX
;
6076 dev
->udma_mask
= UINT_MAX
;
6080 * ata_link_init - Initialize an ata_link structure
6081 * @ap: ATA port link is attached to
6082 * @link: Link structure to initialize
6083 * @pmp: Port multiplier port number
6088 * Kernel thread context (may sleep)
6090 static void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6094 /* clear everything except for devices */
6095 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6099 link
->active_tag
= ATA_TAG_POISON
;
6100 link
->hw_sata_spd_limit
= UINT_MAX
;
6102 /* can't use iterator, ap isn't initialized yet */
6103 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6104 struct ata_device
*dev
= &link
->device
[i
];
6107 dev
->devno
= dev
- link
->device
;
6113 * sata_link_init_spd - Initialize link->sata_spd_limit
6114 * @link: Link to configure sata_spd_limit for
6116 * Initialize @link->[hw_]sata_spd_limit to the currently
6120 * Kernel thread context (may sleep).
6123 * 0 on success, -errno on failure.
6125 static int sata_link_init_spd(struct ata_link
*link
)
6130 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6134 spd
= (scontrol
>> 4) & 0xf;
6136 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6138 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6144 * ata_port_alloc - allocate and initialize basic ATA port resources
6145 * @host: ATA host this allocated port belongs to
6147 * Allocate and initialize basic ATA port resources.
6150 * Allocate ATA port on success, NULL on failure.
6153 * Inherited from calling layer (may sleep).
6155 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6157 struct ata_port
*ap
;
6161 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6165 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6166 ap
->lock
= &host
->lock
;
6167 ap
->flags
= ATA_FLAG_DISABLED
;
6169 ap
->ctl
= ATA_DEVCTL_OBS
;
6171 ap
->dev
= host
->dev
;
6172 ap
->last_ctl
= 0xFF;
6174 #if defined(ATA_VERBOSE_DEBUG)
6175 /* turn on all debugging levels */
6176 ap
->msg_enable
= 0x00FF;
6177 #elif defined(ATA_DEBUG)
6178 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6180 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6183 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6184 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6185 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6186 INIT_LIST_HEAD(&ap
->eh_done_q
);
6187 init_waitqueue_head(&ap
->eh_wait_q
);
6188 init_timer_deferrable(&ap
->fastdrain_timer
);
6189 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6190 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6192 ap
->cbl
= ATA_CBL_NONE
;
6194 ata_link_init(ap
, &ap
->link
, 0);
6197 ap
->stats
.unhandled_irq
= 1;
6198 ap
->stats
.idle_irq
= 1;
6203 static void ata_host_release(struct device
*gendev
, void *res
)
6205 struct ata_host
*host
= dev_get_drvdata(gendev
);
6208 for (i
= 0; i
< host
->n_ports
; i
++) {
6209 struct ata_port
*ap
= host
->ports
[i
];
6214 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6215 ap
->ops
->port_stop(ap
);
6218 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6219 host
->ops
->host_stop(host
);
6221 for (i
= 0; i
< host
->n_ports
; i
++) {
6222 struct ata_port
*ap
= host
->ports
[i
];
6228 scsi_host_put(ap
->scsi_host
);
6231 host
->ports
[i
] = NULL
;
6234 dev_set_drvdata(gendev
, NULL
);
6238 * ata_host_alloc - allocate and init basic ATA host resources
6239 * @dev: generic device this host is associated with
6240 * @max_ports: maximum number of ATA ports associated with this host
6242 * Allocate and initialize basic ATA host resources. LLD calls
6243 * this function to allocate a host, initializes it fully and
6244 * attaches it using ata_host_register().
6246 * @max_ports ports are allocated and host->n_ports is
6247 * initialized to @max_ports. The caller is allowed to decrease
6248 * host->n_ports before calling ata_host_register(). The unused
6249 * ports will be automatically freed on registration.
6252 * Allocate ATA host on success, NULL on failure.
6255 * Inherited from calling layer (may sleep).
6257 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6259 struct ata_host
*host
;
6265 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6268 /* alloc a container for our list of ATA ports (buses) */
6269 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6270 /* alloc a container for our list of ATA ports (buses) */
6271 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6275 devres_add(dev
, host
);
6276 dev_set_drvdata(dev
, host
);
6278 spin_lock_init(&host
->lock
);
6280 host
->n_ports
= max_ports
;
6282 /* allocate ports bound to this host */
6283 for (i
= 0; i
< max_ports
; i
++) {
6284 struct ata_port
*ap
;
6286 ap
= ata_port_alloc(host
);
6291 host
->ports
[i
] = ap
;
6294 devres_remove_group(dev
, NULL
);
6298 devres_release_group(dev
, NULL
);
6303 * ata_host_alloc_pinfo - alloc host and init with port_info array
6304 * @dev: generic device this host is associated with
6305 * @ppi: array of ATA port_info to initialize host with
6306 * @n_ports: number of ATA ports attached to this host
6308 * Allocate ATA host and initialize with info from @ppi. If NULL
6309 * terminated, @ppi may contain fewer entries than @n_ports. The
6310 * last entry will be used for the remaining ports.
6313 * Allocate ATA host on success, NULL on failure.
6316 * Inherited from calling layer (may sleep).
6318 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6319 const struct ata_port_info
* const * ppi
,
6322 const struct ata_port_info
*pi
;
6323 struct ata_host
*host
;
6326 host
= ata_host_alloc(dev
, n_ports
);
6330 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6331 struct ata_port
*ap
= host
->ports
[i
];
6336 ap
->pio_mask
= pi
->pio_mask
;
6337 ap
->mwdma_mask
= pi
->mwdma_mask
;
6338 ap
->udma_mask
= pi
->udma_mask
;
6339 ap
->flags
|= pi
->flags
;
6340 ap
->link
.flags
|= pi
->link_flags
;
6341 ap
->ops
= pi
->port_ops
;
6343 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6344 host
->ops
= pi
->port_ops
;
6345 if (!host
->private_data
&& pi
->private_data
)
6346 host
->private_data
= pi
->private_data
;
6353 * ata_host_start - start and freeze ports of an ATA host
6354 * @host: ATA host to start ports for
6356 * Start and then freeze ports of @host. Started status is
6357 * recorded in host->flags, so this function can be called
6358 * multiple times. Ports are guaranteed to get started only
6359 * once. If host->ops isn't initialized yet, its set to the
6360 * first non-dummy port ops.
6363 * Inherited from calling layer (may sleep).
6366 * 0 if all ports are started successfully, -errno otherwise.
6368 int ata_host_start(struct ata_host
*host
)
6372 if (host
->flags
& ATA_HOST_STARTED
)
6375 for (i
= 0; i
< host
->n_ports
; i
++) {
6376 struct ata_port
*ap
= host
->ports
[i
];
6378 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6379 host
->ops
= ap
->ops
;
6381 if (ap
->ops
->port_start
) {
6382 rc
= ap
->ops
->port_start(ap
);
6384 ata_port_printk(ap
, KERN_ERR
, "failed to "
6385 "start port (errno=%d)\n", rc
);
6390 ata_eh_freeze_port(ap
);
6393 host
->flags
|= ATA_HOST_STARTED
;
6398 struct ata_port
*ap
= host
->ports
[i
];
6400 if (ap
->ops
->port_stop
)
6401 ap
->ops
->port_stop(ap
);
6407 * ata_sas_host_init - Initialize a host struct
6408 * @host: host to initialize
6409 * @dev: device host is attached to
6410 * @flags: host flags
6414 * PCI/etc. bus probe sem.
6417 /* KILLME - the only user left is ipr */
6418 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6419 unsigned long flags
, const struct ata_port_operations
*ops
)
6421 spin_lock_init(&host
->lock
);
6423 host
->flags
= flags
;
6428 * ata_host_register - register initialized ATA host
6429 * @host: ATA host to register
6430 * @sht: template for SCSI host
6432 * Register initialized ATA host. @host is allocated using
6433 * ata_host_alloc() and fully initialized by LLD. This function
6434 * starts ports, registers @host with ATA and SCSI layers and
6435 * probe registered devices.
6438 * Inherited from calling layer (may sleep).
6441 * 0 on success, -errno otherwise.
6443 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6447 /* host must have been started */
6448 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6449 dev_printk(KERN_ERR
, host
->dev
,
6450 "BUG: trying to register unstarted host\n");
6455 /* Blow away unused ports. This happens when LLD can't
6456 * determine the exact number of ports to allocate at
6459 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6460 kfree(host
->ports
[i
]);
6462 /* give ports names and add SCSI hosts */
6463 for (i
= 0; i
< host
->n_ports
; i
++)
6464 host
->ports
[i
]->print_id
= ata_print_id
++;
6466 rc
= ata_scsi_add_hosts(host
, sht
);
6470 /* associate with ACPI nodes */
6471 ata_acpi_associate(host
);
6473 /* set cable, sata_spd_limit and report */
6474 for (i
= 0; i
< host
->n_ports
; i
++) {
6475 struct ata_port
*ap
= host
->ports
[i
];
6477 unsigned long xfer_mask
;
6479 /* set SATA cable type if still unset */
6480 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6481 ap
->cbl
= ATA_CBL_SATA
;
6483 /* init sata_spd_limit to the current value */
6484 sata_link_init_spd(&ap
->link
);
6486 /* report the secondary IRQ for second channel legacy */
6487 irq_line
= host
->irq
;
6488 if (i
== 1 && host
->irq2
)
6489 irq_line
= host
->irq2
;
6491 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6494 /* print per-port info to dmesg */
6495 if (!ata_port_is_dummy(ap
))
6496 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
6497 "ctl 0x%p bmdma 0x%p irq %d\n",
6498 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6499 ata_mode_string(xfer_mask
),
6500 ap
->ioaddr
.cmd_addr
,
6501 ap
->ioaddr
.ctl_addr
,
6502 ap
->ioaddr
.bmdma_addr
,
6505 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6508 /* perform each probe synchronously */
6509 DPRINTK("probe begin\n");
6510 for (i
= 0; i
< host
->n_ports
; i
++) {
6511 struct ata_port
*ap
= host
->ports
[i
];
6515 if (ap
->ops
->error_handler
) {
6516 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6517 unsigned long flags
;
6521 /* kick EH for boot probing */
6522 spin_lock_irqsave(ap
->lock
, flags
);
6525 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6526 ehi
->action
|= ATA_EH_SOFTRESET
;
6527 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6529 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6530 ap
->pflags
|= ATA_PFLAG_LOADING
;
6531 ata_port_schedule_eh(ap
);
6533 spin_unlock_irqrestore(ap
->lock
, flags
);
6535 /* wait for EH to finish */
6536 ata_port_wait_eh(ap
);
6538 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6539 rc
= ata_bus_probe(ap
);
6540 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6543 /* FIXME: do something useful here?
6544 * Current libata behavior will
6545 * tear down everything when
6546 * the module is removed
6547 * or the h/w is unplugged.
6553 /* probes are done, now scan each port's disk(s) */
6554 DPRINTK("host probe begin\n");
6555 for (i
= 0; i
< host
->n_ports
; i
++) {
6556 struct ata_port
*ap
= host
->ports
[i
];
6558 ata_scsi_scan_host(ap
, 1);
6565 * ata_host_activate - start host, request IRQ and register it
6566 * @host: target ATA host
6567 * @irq: IRQ to request
6568 * @irq_handler: irq_handler used when requesting IRQ
6569 * @irq_flags: irq_flags used when requesting IRQ
6570 * @sht: scsi_host_template to use when registering the host
6572 * After allocating an ATA host and initializing it, most libata
6573 * LLDs perform three steps to activate the host - start host,
6574 * request IRQ and register it. This helper takes necessasry
6575 * arguments and performs the three steps in one go.
6578 * Inherited from calling layer (may sleep).
6581 * 0 on success, -errno otherwise.
6583 int ata_host_activate(struct ata_host
*host
, int irq
,
6584 irq_handler_t irq_handler
, unsigned long irq_flags
,
6585 struct scsi_host_template
*sht
)
6589 rc
= ata_host_start(host
);
6593 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6594 dev_driver_string(host
->dev
), host
);
6598 /* Used to print device info at probe */
6601 rc
= ata_host_register(host
, sht
);
6602 /* if failed, just free the IRQ and leave ports alone */
6604 devm_free_irq(host
->dev
, irq
, host
);
6610 * ata_port_detach - Detach ATA port in prepration of device removal
6611 * @ap: ATA port to be detached
6613 * Detach all ATA devices and the associated SCSI devices of @ap;
6614 * then, remove the associated SCSI host. @ap is guaranteed to
6615 * be quiescent on return from this function.
6618 * Kernel thread context (may sleep).
6620 void ata_port_detach(struct ata_port
*ap
)
6622 unsigned long flags
;
6623 struct ata_link
*link
;
6624 struct ata_device
*dev
;
6626 if (!ap
->ops
->error_handler
)
6629 /* tell EH we're leaving & flush EH */
6630 spin_lock_irqsave(ap
->lock
, flags
);
6631 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6632 spin_unlock_irqrestore(ap
->lock
, flags
);
6634 ata_port_wait_eh(ap
);
6636 /* EH is now guaranteed to see UNLOADING, so no new device
6637 * will be attached. Disable all existing devices.
6639 spin_lock_irqsave(ap
->lock
, flags
);
6641 ata_port_for_each_link(link
, ap
) {
6642 ata_link_for_each_dev(dev
, link
)
6643 ata_dev_disable(dev
);
6646 spin_unlock_irqrestore(ap
->lock
, flags
);
6648 /* Final freeze & EH. All in-flight commands are aborted. EH
6649 * will be skipped and retrials will be terminated with bad
6652 spin_lock_irqsave(ap
->lock
, flags
);
6653 ata_port_freeze(ap
); /* won't be thawed */
6654 spin_unlock_irqrestore(ap
->lock
, flags
);
6656 ata_port_wait_eh(ap
);
6657 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6660 /* remove the associated SCSI host */
6661 scsi_remove_host(ap
->scsi_host
);
6665 * ata_host_detach - Detach all ports of an ATA host
6666 * @host: Host to detach
6668 * Detach all ports of @host.
6671 * Kernel thread context (may sleep).
6673 void ata_host_detach(struct ata_host
*host
)
6677 for (i
= 0; i
< host
->n_ports
; i
++)
6678 ata_port_detach(host
->ports
[i
]);
6682 * ata_std_ports - initialize ioaddr with standard port offsets.
6683 * @ioaddr: IO address structure to be initialized
6685 * Utility function which initializes data_addr, error_addr,
6686 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6687 * device_addr, status_addr, and command_addr to standard offsets
6688 * relative to cmd_addr.
6690 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6693 void ata_std_ports(struct ata_ioports
*ioaddr
)
6695 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6696 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6697 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6698 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6699 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6700 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6701 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6702 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6703 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6704 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6711 * ata_pci_remove_one - PCI layer callback for device removal
6712 * @pdev: PCI device that was removed
6714 * PCI layer indicates to libata via this hook that hot-unplug or
6715 * module unload event has occurred. Detach all ports. Resource
6716 * release is handled via devres.
6719 * Inherited from PCI layer (may sleep).
6721 void ata_pci_remove_one(struct pci_dev
*pdev
)
6723 struct device
*dev
= pci_dev_to_dev(pdev
);
6724 struct ata_host
*host
= dev_get_drvdata(dev
);
6726 ata_host_detach(host
);
6729 /* move to PCI subsystem */
6730 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6732 unsigned long tmp
= 0;
6734 switch (bits
->width
) {
6737 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6743 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6749 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6760 return (tmp
== bits
->val
) ? 1 : 0;
6764 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6766 pci_save_state(pdev
);
6767 pci_disable_device(pdev
);
6769 if (mesg
.event
== PM_EVENT_SUSPEND
)
6770 pci_set_power_state(pdev
, PCI_D3hot
);
6773 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6777 pci_set_power_state(pdev
, PCI_D0
);
6778 pci_restore_state(pdev
);
6780 rc
= pcim_enable_device(pdev
);
6782 dev_printk(KERN_ERR
, &pdev
->dev
,
6783 "failed to enable device after resume (%d)\n", rc
);
6787 pci_set_master(pdev
);
6791 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6793 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6796 rc
= ata_host_suspend(host
, mesg
);
6800 ata_pci_device_do_suspend(pdev
, mesg
);
6805 int ata_pci_device_resume(struct pci_dev
*pdev
)
6807 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6810 rc
= ata_pci_device_do_resume(pdev
);
6812 ata_host_resume(host
);
6815 #endif /* CONFIG_PM */
6817 #endif /* CONFIG_PCI */
6820 static int __init
ata_init(void)
6822 ata_probe_timeout
*= HZ
;
6823 ata_wq
= create_workqueue("ata");
6827 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6829 destroy_workqueue(ata_wq
);
6833 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6837 static void __exit
ata_exit(void)
6839 destroy_workqueue(ata_wq
);
6840 destroy_workqueue(ata_aux_wq
);
6843 subsys_initcall(ata_init
);
6844 module_exit(ata_exit
);
6846 static unsigned long ratelimit_time
;
6847 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6849 int ata_ratelimit(void)
6852 unsigned long flags
;
6854 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6856 if (time_after(jiffies
, ratelimit_time
)) {
6858 ratelimit_time
= jiffies
+ (HZ
/5);
6862 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6868 * ata_wait_register - wait until register value changes
6869 * @reg: IO-mapped register
6870 * @mask: Mask to apply to read register value
6871 * @val: Wait condition
6872 * @interval_msec: polling interval in milliseconds
6873 * @timeout_msec: timeout in milliseconds
6875 * Waiting for some bits of register to change is a common
6876 * operation for ATA controllers. This function reads 32bit LE
6877 * IO-mapped register @reg and tests for the following condition.
6879 * (*@reg & mask) != val
6881 * If the condition is met, it returns; otherwise, the process is
6882 * repeated after @interval_msec until timeout.
6885 * Kernel thread context (may sleep)
6888 * The final register value.
6890 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6891 unsigned long interval_msec
,
6892 unsigned long timeout_msec
)
6894 unsigned long timeout
;
6897 tmp
= ioread32(reg
);
6899 /* Calculate timeout _after_ the first read to make sure
6900 * preceding writes reach the controller before starting to
6901 * eat away the timeout.
6903 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6905 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6906 msleep(interval_msec
);
6907 tmp
= ioread32(reg
);
6916 static void ata_dummy_noret(struct ata_port
*ap
) { }
6917 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6918 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6920 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6925 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6927 return AC_ERR_SYSTEM
;
6930 const struct ata_port_operations ata_dummy_port_ops
= {
6931 .port_disable
= ata_port_disable
,
6932 .check_status
= ata_dummy_check_status
,
6933 .check_altstatus
= ata_dummy_check_status
,
6934 .dev_select
= ata_noop_dev_select
,
6935 .qc_prep
= ata_noop_qc_prep
,
6936 .qc_issue
= ata_dummy_qc_issue
,
6937 .freeze
= ata_dummy_noret
,
6938 .thaw
= ata_dummy_noret
,
6939 .error_handler
= ata_dummy_noret
,
6940 .post_internal_cmd
= ata_dummy_qc_noret
,
6941 .irq_clear
= ata_dummy_noret
,
6942 .port_start
= ata_dummy_ret0
,
6943 .port_stop
= ata_dummy_noret
,
6946 const struct ata_port_info ata_dummy_port_info
= {
6947 .port_ops
= &ata_dummy_port_ops
,
6951 * libata is essentially a library of internal helper functions for
6952 * low-level ATA host controller drivers. As such, the API/ABI is
6953 * likely to change as new drivers are added and updated.
6954 * Do not depend on ABI/API stability.
6957 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6958 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6959 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6960 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6961 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6962 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6963 EXPORT_SYMBOL_GPL(ata_std_ports
);
6964 EXPORT_SYMBOL_GPL(ata_host_init
);
6965 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6966 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6967 EXPORT_SYMBOL_GPL(ata_host_start
);
6968 EXPORT_SYMBOL_GPL(ata_host_register
);
6969 EXPORT_SYMBOL_GPL(ata_host_activate
);
6970 EXPORT_SYMBOL_GPL(ata_host_detach
);
6971 EXPORT_SYMBOL_GPL(ata_sg_init
);
6972 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6973 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6974 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6975 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6976 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6977 EXPORT_SYMBOL_GPL(ata_tf_load
);
6978 EXPORT_SYMBOL_GPL(ata_tf_read
);
6979 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6980 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6981 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6982 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6983 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6984 EXPORT_SYMBOL_GPL(ata_check_status
);
6985 EXPORT_SYMBOL_GPL(ata_altstatus
);
6986 EXPORT_SYMBOL_GPL(ata_exec_command
);
6987 EXPORT_SYMBOL_GPL(ata_port_start
);
6988 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
6989 EXPORT_SYMBOL_GPL(ata_interrupt
);
6990 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6991 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6992 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6993 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6994 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
6995 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6996 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6997 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6998 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6999 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7000 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7001 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7002 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7003 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7004 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7005 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7006 EXPORT_SYMBOL_GPL(ata_port_probe
);
7007 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7008 EXPORT_SYMBOL_GPL(sata_set_spd
);
7009 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7010 EXPORT_SYMBOL_GPL(sata_link_resume
);
7011 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7012 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7013 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7014 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7015 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7016 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7017 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7018 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7019 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7020 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7021 EXPORT_SYMBOL_GPL(ata_port_disable
);
7022 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7023 EXPORT_SYMBOL_GPL(ata_wait_register
);
7024 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7025 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7026 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7027 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7028 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7029 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7030 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7031 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7032 EXPORT_SYMBOL_GPL(ata_host_intr
);
7033 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7034 EXPORT_SYMBOL_GPL(sata_scr_read
);
7035 EXPORT_SYMBOL_GPL(sata_scr_write
);
7036 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7037 EXPORT_SYMBOL_GPL(ata_link_online
);
7038 EXPORT_SYMBOL_GPL(ata_link_offline
);
7040 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7041 EXPORT_SYMBOL_GPL(ata_host_resume
);
7042 #endif /* CONFIG_PM */
7043 EXPORT_SYMBOL_GPL(ata_id_string
);
7044 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7045 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7046 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7048 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7049 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7050 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7053 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7054 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7055 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7056 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7057 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7058 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7060 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7061 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7062 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7063 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7064 #endif /* CONFIG_PM */
7065 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7066 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7067 #endif /* CONFIG_PCI */
7069 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7070 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7071 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7072 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7073 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7074 EXPORT_SYMBOL_GPL(ata_link_abort
);
7075 EXPORT_SYMBOL_GPL(ata_port_abort
);
7076 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7077 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7078 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7079 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7080 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7081 EXPORT_SYMBOL_GPL(ata_do_eh
);
7082 EXPORT_SYMBOL_GPL(ata_irq_on
);
7083 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
7084 EXPORT_SYMBOL_GPL(ata_irq_ack
);
7085 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
7086 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7088 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7089 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7090 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7091 EXPORT_SYMBOL_GPL(ata_cable_sata
);