2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
52 #include <scsi/scsi.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_host.h>
55 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
62 #define DRV_VERSION "2.21" /* must be exactly four chars */
65 /* debounce timing parameters in msecs { interval, duration, timeout } */
66 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
67 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
68 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
70 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
71 u16 heads
, u16 sectors
);
72 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
74 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
76 unsigned int ata_print_id
= 1;
77 static struct workqueue_struct
*ata_wq
;
79 struct workqueue_struct
*ata_aux_wq
;
81 int atapi_enabled
= 1;
82 module_param(atapi_enabled
, int, 0444);
83 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
86 module_param(atapi_dmadir
, int, 0444);
87 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
90 module_param_named(fua
, libata_fua
, int, 0444);
91 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
93 static int ata_ignore_hpa
= 0;
94 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
95 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
97 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
98 module_param(ata_probe_timeout
, int, 0444);
99 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
101 int libata_noacpi
= 1;
102 module_param_named(noacpi
, libata_noacpi
, int, 0444);
103 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
105 MODULE_AUTHOR("Jeff Garzik");
106 MODULE_DESCRIPTION("Library module for ATA devices");
107 MODULE_LICENSE("GPL");
108 MODULE_VERSION(DRV_VERSION
);
112 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
113 * @tf: Taskfile to convert
114 * @pmp: Port multiplier port
115 * @is_cmd: This FIS is for command
116 * @fis: Buffer into which data will output
118 * Converts a standard ATA taskfile to a Serial ATA
119 * FIS structure (Register - Host to Device).
122 * Inherited from caller.
124 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
126 fis
[0] = 0x27; /* Register - Host to Device FIS */
127 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
129 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
131 fis
[2] = tf
->command
;
132 fis
[3] = tf
->feature
;
139 fis
[8] = tf
->hob_lbal
;
140 fis
[9] = tf
->hob_lbam
;
141 fis
[10] = tf
->hob_lbah
;
142 fis
[11] = tf
->hob_feature
;
145 fis
[13] = tf
->hob_nsect
;
156 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
157 * @fis: Buffer from which data will be input
158 * @tf: Taskfile to output
160 * Converts a serial ATA FIS structure to a standard ATA taskfile.
163 * Inherited from caller.
166 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
168 tf
->command
= fis
[2]; /* status */
169 tf
->feature
= fis
[3]; /* error */
176 tf
->hob_lbal
= fis
[8];
177 tf
->hob_lbam
= fis
[9];
178 tf
->hob_lbah
= fis
[10];
181 tf
->hob_nsect
= fis
[13];
184 static const u8 ata_rw_cmds
[] = {
188 ATA_CMD_READ_MULTI_EXT
,
189 ATA_CMD_WRITE_MULTI_EXT
,
193 ATA_CMD_WRITE_MULTI_FUA_EXT
,
197 ATA_CMD_PIO_READ_EXT
,
198 ATA_CMD_PIO_WRITE_EXT
,
211 ATA_CMD_WRITE_FUA_EXT
215 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
216 * @tf: command to examine and configure
217 * @dev: device tf belongs to
219 * Examine the device configuration and tf->flags to calculate
220 * the proper read/write commands and protocol to use.
225 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
229 int index
, fua
, lba48
, write
;
231 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
232 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
233 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
235 if (dev
->flags
& ATA_DFLAG_PIO
) {
236 tf
->protocol
= ATA_PROT_PIO
;
237 index
= dev
->multi_count
? 0 : 8;
238 } else if (lba48
&& (dev
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
239 /* Unable to use DMA due to host limitation */
240 tf
->protocol
= ATA_PROT_PIO
;
241 index
= dev
->multi_count
? 0 : 8;
243 tf
->protocol
= ATA_PROT_DMA
;
247 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
256 * ata_tf_read_block - Read block address from ATA taskfile
257 * @tf: ATA taskfile of interest
258 * @dev: ATA device @tf belongs to
263 * Read block address from @tf. This function can handle all
264 * three address formats - LBA, LBA48 and CHS. tf->protocol and
265 * flags select the address format to use.
268 * Block address read from @tf.
270 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
274 if (tf
->flags
& ATA_TFLAG_LBA
) {
275 if (tf
->flags
& ATA_TFLAG_LBA48
) {
276 block
|= (u64
)tf
->hob_lbah
<< 40;
277 block
|= (u64
)tf
->hob_lbam
<< 32;
278 block
|= tf
->hob_lbal
<< 24;
280 block
|= (tf
->device
& 0xf) << 24;
282 block
|= tf
->lbah
<< 16;
283 block
|= tf
->lbam
<< 8;
288 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
289 head
= tf
->device
& 0xf;
292 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
299 * ata_build_rw_tf - Build ATA taskfile for given read/write request
300 * @tf: Target ATA taskfile
301 * @dev: ATA device @tf belongs to
302 * @block: Block address
303 * @n_block: Number of blocks
304 * @tf_flags: RW/FUA etc...
310 * Build ATA taskfile @tf for read/write request described by
311 * @block, @n_block, @tf_flags and @tag on @dev.
315 * 0 on success, -ERANGE if the request is too large for @dev,
316 * -EINVAL if the request is invalid.
318 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
319 u64 block
, u32 n_block
, unsigned int tf_flags
,
322 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
323 tf
->flags
|= tf_flags
;
325 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
327 if (!lba_48_ok(block
, n_block
))
330 tf
->protocol
= ATA_PROT_NCQ
;
331 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
333 if (tf
->flags
& ATA_TFLAG_WRITE
)
334 tf
->command
= ATA_CMD_FPDMA_WRITE
;
336 tf
->command
= ATA_CMD_FPDMA_READ
;
338 tf
->nsect
= tag
<< 3;
339 tf
->hob_feature
= (n_block
>> 8) & 0xff;
340 tf
->feature
= n_block
& 0xff;
342 tf
->hob_lbah
= (block
>> 40) & 0xff;
343 tf
->hob_lbam
= (block
>> 32) & 0xff;
344 tf
->hob_lbal
= (block
>> 24) & 0xff;
345 tf
->lbah
= (block
>> 16) & 0xff;
346 tf
->lbam
= (block
>> 8) & 0xff;
347 tf
->lbal
= block
& 0xff;
350 if (tf
->flags
& ATA_TFLAG_FUA
)
351 tf
->device
|= 1 << 7;
352 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
353 tf
->flags
|= ATA_TFLAG_LBA
;
355 if (lba_28_ok(block
, n_block
)) {
357 tf
->device
|= (block
>> 24) & 0xf;
358 } else if (lba_48_ok(block
, n_block
)) {
359 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
363 tf
->flags
|= ATA_TFLAG_LBA48
;
365 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
367 tf
->hob_lbah
= (block
>> 40) & 0xff;
368 tf
->hob_lbam
= (block
>> 32) & 0xff;
369 tf
->hob_lbal
= (block
>> 24) & 0xff;
371 /* request too large even for LBA48 */
374 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
377 tf
->nsect
= n_block
& 0xff;
379 tf
->lbah
= (block
>> 16) & 0xff;
380 tf
->lbam
= (block
>> 8) & 0xff;
381 tf
->lbal
= block
& 0xff;
383 tf
->device
|= ATA_LBA
;
386 u32 sect
, head
, cyl
, track
;
388 /* The request -may- be too large for CHS addressing. */
389 if (!lba_28_ok(block
, n_block
))
392 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
395 /* Convert LBA to CHS */
396 track
= (u32
)block
/ dev
->sectors
;
397 cyl
= track
/ dev
->heads
;
398 head
= track
% dev
->heads
;
399 sect
= (u32
)block
% dev
->sectors
+ 1;
401 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
402 (u32
)block
, track
, cyl
, head
, sect
);
404 /* Check whether the converted CHS can fit.
408 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
411 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
422 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
423 * @pio_mask: pio_mask
424 * @mwdma_mask: mwdma_mask
425 * @udma_mask: udma_mask
427 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
428 * unsigned int xfer_mask.
436 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
437 unsigned int mwdma_mask
,
438 unsigned int udma_mask
)
440 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
441 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
442 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
446 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
447 * @xfer_mask: xfer_mask to unpack
448 * @pio_mask: resulting pio_mask
449 * @mwdma_mask: resulting mwdma_mask
450 * @udma_mask: resulting udma_mask
452 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
453 * Any NULL distination masks will be ignored.
455 static void ata_unpack_xfermask(unsigned int xfer_mask
,
456 unsigned int *pio_mask
,
457 unsigned int *mwdma_mask
,
458 unsigned int *udma_mask
)
461 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
463 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
465 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
468 static const struct ata_xfer_ent
{
472 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
473 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
474 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
479 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
480 * @xfer_mask: xfer_mask of interest
482 * Return matching XFER_* value for @xfer_mask. Only the highest
483 * bit of @xfer_mask is considered.
489 * Matching XFER_* value, 0 if no match found.
491 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
493 int highbit
= fls(xfer_mask
) - 1;
494 const struct ata_xfer_ent
*ent
;
496 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
497 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
498 return ent
->base
+ highbit
- ent
->shift
;
503 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
504 * @xfer_mode: XFER_* of interest
506 * Return matching xfer_mask for @xfer_mode.
512 * Matching xfer_mask, 0 if no match found.
514 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
516 const struct ata_xfer_ent
*ent
;
518 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
519 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
520 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
525 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
526 * @xfer_mode: XFER_* of interest
528 * Return matching xfer_shift for @xfer_mode.
534 * Matching xfer_shift, -1 if no match found.
536 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
538 const struct ata_xfer_ent
*ent
;
540 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
541 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
547 * ata_mode_string - convert xfer_mask to string
548 * @xfer_mask: mask of bits supported; only highest bit counts.
550 * Determine string which represents the highest speed
551 * (highest bit in @modemask).
557 * Constant C string representing highest speed listed in
558 * @mode_mask, or the constant C string "<n/a>".
560 static const char *ata_mode_string(unsigned int xfer_mask
)
562 static const char * const xfer_mode_str
[] = {
586 highbit
= fls(xfer_mask
) - 1;
587 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
588 return xfer_mode_str
[highbit
];
592 static const char *sata_spd_string(unsigned int spd
)
594 static const char * const spd_str
[] = {
599 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
601 return spd_str
[spd
- 1];
604 void ata_dev_disable(struct ata_device
*dev
)
606 if (ata_dev_enabled(dev
)) {
607 if (ata_msg_drv(dev
->ap
))
608 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
609 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
616 * ata_devchk - PATA device presence detection
617 * @ap: ATA channel to examine
618 * @device: Device to examine (starting at zero)
620 * This technique was originally described in
621 * Hale Landis's ATADRVR (www.ata-atapi.com), and
622 * later found its way into the ATA/ATAPI spec.
624 * Write a pattern to the ATA shadow registers,
625 * and if a device is present, it will respond by
626 * correctly storing and echoing back the
627 * ATA shadow register contents.
633 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
635 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
638 ap
->ops
->dev_select(ap
, device
);
640 iowrite8(0x55, ioaddr
->nsect_addr
);
641 iowrite8(0xaa, ioaddr
->lbal_addr
);
643 iowrite8(0xaa, ioaddr
->nsect_addr
);
644 iowrite8(0x55, ioaddr
->lbal_addr
);
646 iowrite8(0x55, ioaddr
->nsect_addr
);
647 iowrite8(0xaa, ioaddr
->lbal_addr
);
649 nsect
= ioread8(ioaddr
->nsect_addr
);
650 lbal
= ioread8(ioaddr
->lbal_addr
);
652 if ((nsect
== 0x55) && (lbal
== 0xaa))
653 return 1; /* we found a device */
655 return 0; /* nothing found */
659 * ata_dev_classify - determine device type based on ATA-spec signature
660 * @tf: ATA taskfile register set for device to be identified
662 * Determine from taskfile register contents whether a device is
663 * ATA or ATAPI, as per "Signature and persistence" section
664 * of ATA/PI spec (volume 1, sect 5.14).
670 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
671 * the event of failure.
674 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
676 /* Apple's open source Darwin code hints that some devices only
677 * put a proper signature into the LBA mid/high registers,
678 * So, we only check those. It's sufficient for uniqueness.
681 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
682 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
683 DPRINTK("found ATA device by sig\n");
687 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
688 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
689 DPRINTK("found ATAPI device by sig\n");
690 return ATA_DEV_ATAPI
;
693 DPRINTK("unknown device\n");
694 return ATA_DEV_UNKNOWN
;
698 * ata_dev_try_classify - Parse returned ATA device signature
699 * @ap: ATA channel to examine
700 * @device: Device to examine (starting at zero)
701 * @r_err: Value of error register on completion
703 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
704 * an ATA/ATAPI-defined set of values is placed in the ATA
705 * shadow registers, indicating the results of device detection
708 * Select the ATA device, and read the values from the ATA shadow
709 * registers. Then parse according to the Error register value,
710 * and the spec-defined values examined by ata_dev_classify().
716 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
720 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
722 struct ata_taskfile tf
;
726 ap
->ops
->dev_select(ap
, device
);
728 memset(&tf
, 0, sizeof(tf
));
730 ap
->ops
->tf_read(ap
, &tf
);
735 /* see if device passed diags: if master then continue and warn later */
736 if (err
== 0 && device
== 0)
737 /* diagnostic fail : do nothing _YET_ */
738 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
741 else if ((device
== 0) && (err
== 0x81))
746 /* determine if device is ATA or ATAPI */
747 class = ata_dev_classify(&tf
);
749 if (class == ATA_DEV_UNKNOWN
)
751 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
757 * ata_id_string - Convert IDENTIFY DEVICE page into string
758 * @id: IDENTIFY DEVICE results we will examine
759 * @s: string into which data is output
760 * @ofs: offset into identify device page
761 * @len: length of string to return. must be an even number.
763 * The strings in the IDENTIFY DEVICE page are broken up into
764 * 16-bit chunks. Run through the string, and output each
765 * 8-bit chunk linearly, regardless of platform.
771 void ata_id_string(const u16
*id
, unsigned char *s
,
772 unsigned int ofs
, unsigned int len
)
791 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
792 * @id: IDENTIFY DEVICE results we will examine
793 * @s: string into which data is output
794 * @ofs: offset into identify device page
795 * @len: length of string to return. must be an odd number.
797 * This function is identical to ata_id_string except that it
798 * trims trailing spaces and terminates the resulting string with
799 * null. @len must be actual maximum length (even number) + 1.
804 void ata_id_c_string(const u16
*id
, unsigned char *s
,
805 unsigned int ofs
, unsigned int len
)
811 ata_id_string(id
, s
, ofs
, len
- 1);
813 p
= s
+ strnlen(s
, len
- 1);
814 while (p
> s
&& p
[-1] == ' ')
819 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
823 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
824 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
825 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
826 sectors
|= (tf
->lbah
& 0xff) << 16;
827 sectors
|= (tf
->lbam
& 0xff) << 8;
828 sectors
|= (tf
->lbal
& 0xff);
833 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
837 sectors
|= (tf
->device
& 0x0f) << 24;
838 sectors
|= (tf
->lbah
& 0xff) << 16;
839 sectors
|= (tf
->lbam
& 0xff) << 8;
840 sectors
|= (tf
->lbal
& 0xff);
846 * ata_read_native_max_address_ext - LBA48 native max query
847 * @dev: Device to query
849 * Perform an LBA48 size query upon the device in question. Return the
850 * actual LBA48 size or zero if the command fails.
853 static u64
ata_read_native_max_address_ext(struct ata_device
*dev
)
856 struct ata_taskfile tf
;
858 ata_tf_init(dev
, &tf
);
860 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
861 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
862 tf
.protocol
|= ATA_PROT_NODATA
;
865 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
869 return ata_tf_to_lba48(&tf
);
873 * ata_read_native_max_address - LBA28 native max query
874 * @dev: Device to query
876 * Performa an LBA28 size query upon the device in question. Return the
877 * actual LBA28 size or zero if the command fails.
880 static u64
ata_read_native_max_address(struct ata_device
*dev
)
883 struct ata_taskfile tf
;
885 ata_tf_init(dev
, &tf
);
887 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
888 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
889 tf
.protocol
|= ATA_PROT_NODATA
;
892 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
896 return ata_tf_to_lba(&tf
);
900 * ata_set_native_max_address_ext - LBA48 native max set
901 * @dev: Device to query
902 * @new_sectors: new max sectors value to set for the device
904 * Perform an LBA48 size set max upon the device in question. Return the
905 * actual LBA48 size or zero if the command fails.
908 static u64
ata_set_native_max_address_ext(struct ata_device
*dev
, u64 new_sectors
)
911 struct ata_taskfile tf
;
915 ata_tf_init(dev
, &tf
);
917 tf
.command
= ATA_CMD_SET_MAX_EXT
;
918 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
919 tf
.protocol
|= ATA_PROT_NODATA
;
922 tf
.lbal
= (new_sectors
>> 0) & 0xff;
923 tf
.lbam
= (new_sectors
>> 8) & 0xff;
924 tf
.lbah
= (new_sectors
>> 16) & 0xff;
926 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
927 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
928 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
930 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
934 return ata_tf_to_lba48(&tf
);
938 * ata_set_native_max_address - LBA28 native max set
939 * @dev: Device to query
940 * @new_sectors: new max sectors value to set for the device
942 * Perform an LBA28 size set max upon the device in question. Return the
943 * actual LBA28 size or zero if the command fails.
946 static u64
ata_set_native_max_address(struct ata_device
*dev
, u64 new_sectors
)
949 struct ata_taskfile tf
;
953 ata_tf_init(dev
, &tf
);
955 tf
.command
= ATA_CMD_SET_MAX
;
956 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
957 tf
.protocol
|= ATA_PROT_NODATA
;
959 tf
.lbal
= (new_sectors
>> 0) & 0xff;
960 tf
.lbam
= (new_sectors
>> 8) & 0xff;
961 tf
.lbah
= (new_sectors
>> 16) & 0xff;
962 tf
.device
|= ((new_sectors
>> 24) & 0x0f) | 0x40;
964 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
968 return ata_tf_to_lba(&tf
);
972 * ata_hpa_resize - Resize a device with an HPA set
973 * @dev: Device to resize
975 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
976 * it if required to the full size of the media. The caller must check
977 * the drive has the HPA feature set enabled.
980 static u64
ata_hpa_resize(struct ata_device
*dev
)
982 u64 sectors
= dev
->n_sectors
;
985 if (ata_id_has_lba48(dev
->id
))
986 hpa_sectors
= ata_read_native_max_address_ext(dev
);
988 hpa_sectors
= ata_read_native_max_address(dev
);
990 if (hpa_sectors
> sectors
) {
991 ata_dev_printk(dev
, KERN_INFO
,
992 "Host Protected Area detected:\n"
993 "\tcurrent size: %lld sectors\n"
994 "\tnative size: %lld sectors\n",
995 (long long)sectors
, (long long)hpa_sectors
);
997 if (ata_ignore_hpa
) {
998 if (ata_id_has_lba48(dev
->id
))
999 hpa_sectors
= ata_set_native_max_address_ext(dev
, hpa_sectors
);
1001 hpa_sectors
= ata_set_native_max_address(dev
,
1005 ata_dev_printk(dev
, KERN_INFO
, "native size "
1006 "increased to %lld sectors\n",
1007 (long long)hpa_sectors
);
1011 } else if (hpa_sectors
< sectors
)
1012 ata_dev_printk(dev
, KERN_WARNING
, "%s 1: hpa sectors (%lld) "
1013 "is smaller than sectors (%lld)\n", __FUNCTION__
,
1014 (long long)hpa_sectors
, (long long)sectors
);
1019 static u64
ata_id_n_sectors(const u16
*id
)
1021 if (ata_id_has_lba(id
)) {
1022 if (ata_id_has_lba48(id
))
1023 return ata_id_u64(id
, 100);
1025 return ata_id_u32(id
, 60);
1027 if (ata_id_current_chs_valid(id
))
1028 return ata_id_u32(id
, 57);
1030 return id
[1] * id
[3] * id
[6];
1035 * ata_id_to_dma_mode - Identify DMA mode from id block
1036 * @dev: device to identify
1037 * @unknown: mode to assume if we cannot tell
1039 * Set up the timing values for the device based upon the identify
1040 * reported values for the DMA mode. This function is used by drivers
1041 * which rely upon firmware configured modes, but wish to report the
1042 * mode correctly when possible.
1044 * In addition we emit similarly formatted messages to the default
1045 * ata_dev_set_mode handler, in order to provide consistency of
1049 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1054 /* Pack the DMA modes */
1055 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1056 if (dev
->id
[53] & 0x04)
1057 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1059 /* Select the mode in use */
1060 mode
= ata_xfer_mask2mode(mask
);
1063 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1064 ata_mode_string(mask
));
1066 /* SWDMA perhaps ? */
1068 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1071 /* Configure the device reporting */
1072 dev
->xfer_mode
= mode
;
1073 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1077 * ata_noop_dev_select - Select device 0/1 on ATA bus
1078 * @ap: ATA channel to manipulate
1079 * @device: ATA device (numbered from zero) to select
1081 * This function performs no actual function.
1083 * May be used as the dev_select() entry in ata_port_operations.
1088 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1094 * ata_std_dev_select - Select device 0/1 on ATA bus
1095 * @ap: ATA channel to manipulate
1096 * @device: ATA device (numbered from zero) to select
1098 * Use the method defined in the ATA specification to
1099 * make either device 0, or device 1, active on the
1100 * ATA channel. Works with both PIO and MMIO.
1102 * May be used as the dev_select() entry in ata_port_operations.
1108 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1113 tmp
= ATA_DEVICE_OBS
;
1115 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1117 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1118 ata_pause(ap
); /* needed; also flushes, for mmio */
1122 * ata_dev_select - Select device 0/1 on ATA bus
1123 * @ap: ATA channel to manipulate
1124 * @device: ATA device (numbered from zero) to select
1125 * @wait: non-zero to wait for Status register BSY bit to clear
1126 * @can_sleep: non-zero if context allows sleeping
1128 * Use the method defined in the ATA specification to
1129 * make either device 0, or device 1, active on the
1132 * This is a high-level version of ata_std_dev_select(),
1133 * which additionally provides the services of inserting
1134 * the proper pauses and status polling, where needed.
1140 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1141 unsigned int wait
, unsigned int can_sleep
)
1143 if (ata_msg_probe(ap
))
1144 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1145 "device %u, wait %u\n", device
, wait
);
1150 ap
->ops
->dev_select(ap
, device
);
1153 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1160 * ata_dump_id - IDENTIFY DEVICE info debugging output
1161 * @id: IDENTIFY DEVICE page to dump
1163 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1170 static inline void ata_dump_id(const u16
*id
)
1172 DPRINTK("49==0x%04x "
1182 DPRINTK("80==0x%04x "
1192 DPRINTK("88==0x%04x "
1199 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1200 * @id: IDENTIFY data to compute xfer mask from
1202 * Compute the xfermask for this device. This is not as trivial
1203 * as it seems if we must consider early devices correctly.
1205 * FIXME: pre IDE drive timing (do we care ?).
1213 static unsigned int ata_id_xfermask(const u16
*id
)
1215 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1217 /* Usual case. Word 53 indicates word 64 is valid */
1218 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1219 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1223 /* If word 64 isn't valid then Word 51 high byte holds
1224 * the PIO timing number for the maximum. Turn it into
1227 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1228 if (mode
< 5) /* Valid PIO range */
1229 pio_mask
= (2 << mode
) - 1;
1233 /* But wait.. there's more. Design your standards by
1234 * committee and you too can get a free iordy field to
1235 * process. However its the speeds not the modes that
1236 * are supported... Note drivers using the timing API
1237 * will get this right anyway
1241 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1243 if (ata_id_is_cfa(id
)) {
1245 * Process compact flash extended modes
1247 int pio
= id
[163] & 0x7;
1248 int dma
= (id
[163] >> 3) & 7;
1251 pio_mask
|= (1 << 5);
1253 pio_mask
|= (1 << 6);
1255 mwdma_mask
|= (1 << 3);
1257 mwdma_mask
|= (1 << 4);
1261 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1262 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1264 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1268 * ata_port_queue_task - Queue port_task
1269 * @ap: The ata_port to queue port_task for
1270 * @fn: workqueue function to be scheduled
1271 * @data: data for @fn to use
1272 * @delay: delay time for workqueue function
1274 * Schedule @fn(@data) for execution after @delay jiffies using
1275 * port_task. There is one port_task per port and it's the
1276 * user(low level driver)'s responsibility to make sure that only
1277 * one task is active at any given time.
1279 * libata core layer takes care of synchronization between
1280 * port_task and EH. ata_port_queue_task() may be ignored for EH
1284 * Inherited from caller.
1286 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1287 unsigned long delay
)
1289 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1290 ap
->port_task_data
= data
;
1292 /* may fail if ata_port_flush_task() in progress */
1293 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1297 * ata_port_flush_task - Flush port_task
1298 * @ap: The ata_port to flush port_task for
1300 * After this function completes, port_task is guranteed not to
1301 * be running or scheduled.
1304 * Kernel thread context (may sleep)
1306 void ata_port_flush_task(struct ata_port
*ap
)
1310 cancel_rearming_delayed_work(&ap
->port_task
);
1312 if (ata_msg_ctl(ap
))
1313 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1316 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1318 struct completion
*waiting
= qc
->private_data
;
1324 * ata_exec_internal_sg - execute libata internal command
1325 * @dev: Device to which the command is sent
1326 * @tf: Taskfile registers for the command and the result
1327 * @cdb: CDB for packet command
1328 * @dma_dir: Data tranfer direction of the command
1329 * @sg: sg list for the data buffer of the command
1330 * @n_elem: Number of sg entries
1332 * Executes libata internal command with timeout. @tf contains
1333 * command on entry and result on return. Timeout and error
1334 * conditions are reported via return value. No recovery action
1335 * is taken after a command times out. It's caller's duty to
1336 * clean up after timeout.
1339 * None. Should be called with kernel context, might sleep.
1342 * Zero on success, AC_ERR_* mask on failure
1344 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1345 struct ata_taskfile
*tf
, const u8
*cdb
,
1346 int dma_dir
, struct scatterlist
*sg
,
1347 unsigned int n_elem
)
1349 struct ata_port
*ap
= dev
->ap
;
1350 u8 command
= tf
->command
;
1351 struct ata_queued_cmd
*qc
;
1352 unsigned int tag
, preempted_tag
;
1353 u32 preempted_sactive
, preempted_qc_active
;
1354 DECLARE_COMPLETION_ONSTACK(wait
);
1355 unsigned long flags
;
1356 unsigned int err_mask
;
1359 spin_lock_irqsave(ap
->lock
, flags
);
1361 /* no internal command while frozen */
1362 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1363 spin_unlock_irqrestore(ap
->lock
, flags
);
1364 return AC_ERR_SYSTEM
;
1367 /* initialize internal qc */
1369 /* XXX: Tag 0 is used for drivers with legacy EH as some
1370 * drivers choke if any other tag is given. This breaks
1371 * ata_tag_internal() test for those drivers. Don't use new
1372 * EH stuff without converting to it.
1374 if (ap
->ops
->error_handler
)
1375 tag
= ATA_TAG_INTERNAL
;
1379 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1381 qc
= __ata_qc_from_tag(ap
, tag
);
1389 preempted_tag
= ap
->active_tag
;
1390 preempted_sactive
= ap
->sactive
;
1391 preempted_qc_active
= ap
->qc_active
;
1392 ap
->active_tag
= ATA_TAG_POISON
;
1396 /* prepare & issue qc */
1399 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1400 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1401 qc
->dma_dir
= dma_dir
;
1402 if (dma_dir
!= DMA_NONE
) {
1403 unsigned int i
, buflen
= 0;
1405 for (i
= 0; i
< n_elem
; i
++)
1406 buflen
+= sg
[i
].length
;
1408 ata_sg_init(qc
, sg
, n_elem
);
1409 qc
->nbytes
= buflen
;
1412 qc
->private_data
= &wait
;
1413 qc
->complete_fn
= ata_qc_complete_internal
;
1417 spin_unlock_irqrestore(ap
->lock
, flags
);
1419 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1421 ata_port_flush_task(ap
);
1424 spin_lock_irqsave(ap
->lock
, flags
);
1426 /* We're racing with irq here. If we lose, the
1427 * following test prevents us from completing the qc
1428 * twice. If we win, the port is frozen and will be
1429 * cleaned up by ->post_internal_cmd().
1431 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1432 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1434 if (ap
->ops
->error_handler
)
1435 ata_port_freeze(ap
);
1437 ata_qc_complete(qc
);
1439 if (ata_msg_warn(ap
))
1440 ata_dev_printk(dev
, KERN_WARNING
,
1441 "qc timeout (cmd 0x%x)\n", command
);
1444 spin_unlock_irqrestore(ap
->lock
, flags
);
1447 /* do post_internal_cmd */
1448 if (ap
->ops
->post_internal_cmd
)
1449 ap
->ops
->post_internal_cmd(qc
);
1451 /* perform minimal error analysis */
1452 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1453 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1454 qc
->err_mask
|= AC_ERR_DEV
;
1457 qc
->err_mask
|= AC_ERR_OTHER
;
1459 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1460 qc
->err_mask
&= ~AC_ERR_OTHER
;
1464 spin_lock_irqsave(ap
->lock
, flags
);
1466 *tf
= qc
->result_tf
;
1467 err_mask
= qc
->err_mask
;
1470 ap
->active_tag
= preempted_tag
;
1471 ap
->sactive
= preempted_sactive
;
1472 ap
->qc_active
= preempted_qc_active
;
1474 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1475 * Until those drivers are fixed, we detect the condition
1476 * here, fail the command with AC_ERR_SYSTEM and reenable the
1479 * Note that this doesn't change any behavior as internal
1480 * command failure results in disabling the device in the
1481 * higher layer for LLDDs without new reset/EH callbacks.
1483 * Kill the following code as soon as those drivers are fixed.
1485 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1486 err_mask
|= AC_ERR_SYSTEM
;
1490 spin_unlock_irqrestore(ap
->lock
, flags
);
1496 * ata_exec_internal - execute libata internal command
1497 * @dev: Device to which the command is sent
1498 * @tf: Taskfile registers for the command and the result
1499 * @cdb: CDB for packet command
1500 * @dma_dir: Data tranfer direction of the command
1501 * @buf: Data buffer of the command
1502 * @buflen: Length of data buffer
1504 * Wrapper around ata_exec_internal_sg() which takes simple
1505 * buffer instead of sg list.
1508 * None. Should be called with kernel context, might sleep.
1511 * Zero on success, AC_ERR_* mask on failure
1513 unsigned ata_exec_internal(struct ata_device
*dev
,
1514 struct ata_taskfile
*tf
, const u8
*cdb
,
1515 int dma_dir
, void *buf
, unsigned int buflen
)
1517 struct scatterlist
*psg
= NULL
, sg
;
1518 unsigned int n_elem
= 0;
1520 if (dma_dir
!= DMA_NONE
) {
1522 sg_init_one(&sg
, buf
, buflen
);
1527 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1531 * ata_do_simple_cmd - execute simple internal command
1532 * @dev: Device to which the command is sent
1533 * @cmd: Opcode to execute
1535 * Execute a 'simple' command, that only consists of the opcode
1536 * 'cmd' itself, without filling any other registers
1539 * Kernel thread context (may sleep).
1542 * Zero on success, AC_ERR_* mask on failure
1544 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1546 struct ata_taskfile tf
;
1548 ata_tf_init(dev
, &tf
);
1551 tf
.flags
|= ATA_TFLAG_DEVICE
;
1552 tf
.protocol
= ATA_PROT_NODATA
;
1554 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1558 * ata_pio_need_iordy - check if iordy needed
1561 * Check if the current speed of the device requires IORDY. Used
1562 * by various controllers for chip configuration.
1565 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1567 /* Controller doesn't support IORDY. Probably a pointless check
1568 as the caller should know this */
1569 if (adev
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1571 /* PIO3 and higher it is mandatory */
1572 if (adev
->pio_mode
> XFER_PIO_2
)
1574 /* We turn it on when possible */
1575 if (ata_id_has_iordy(adev
->id
))
1581 * ata_pio_mask_no_iordy - Return the non IORDY mask
1584 * Compute the highest mode possible if we are not using iordy. Return
1585 * -1 if no iordy mode is available.
1588 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1590 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1591 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1592 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1593 /* Is the speed faster than the drive allows non IORDY ? */
1595 /* This is cycle times not frequency - watch the logic! */
1596 if (pio
> 240) /* PIO2 is 240nS per cycle */
1597 return 3 << ATA_SHIFT_PIO
;
1598 return 7 << ATA_SHIFT_PIO
;
1601 return 3 << ATA_SHIFT_PIO
;
1605 * ata_dev_read_id - Read ID data from the specified device
1606 * @dev: target device
1607 * @p_class: pointer to class of the target device (may be changed)
1608 * @flags: ATA_READID_* flags
1609 * @id: buffer to read IDENTIFY data into
1611 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1612 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1613 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1614 * for pre-ATA4 drives.
1617 * Kernel thread context (may sleep)
1620 * 0 on success, -errno otherwise.
1622 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1623 unsigned int flags
, u16
*id
)
1625 struct ata_port
*ap
= dev
->ap
;
1626 unsigned int class = *p_class
;
1627 struct ata_taskfile tf
;
1628 unsigned int err_mask
= 0;
1630 int may_fallback
= 1, tried_spinup
= 0;
1633 if (ata_msg_ctl(ap
))
1634 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1636 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1638 ata_tf_init(dev
, &tf
);
1642 tf
.command
= ATA_CMD_ID_ATA
;
1645 tf
.command
= ATA_CMD_ID_ATAPI
;
1649 reason
= "unsupported class";
1653 tf
.protocol
= ATA_PROT_PIO
;
1655 /* Some devices choke if TF registers contain garbage. Make
1656 * sure those are properly initialized.
1658 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1660 /* Device presence detection is unreliable on some
1661 * controllers. Always poll IDENTIFY if available.
1663 tf
.flags
|= ATA_TFLAG_POLLING
;
1665 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1666 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1668 if (err_mask
& AC_ERR_NODEV_HINT
) {
1669 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1670 ap
->print_id
, dev
->devno
);
1674 /* Device or controller might have reported the wrong
1675 * device class. Give a shot at the other IDENTIFY if
1676 * the current one is aborted by the device.
1679 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1682 if (class == ATA_DEV_ATA
)
1683 class = ATA_DEV_ATAPI
;
1685 class = ATA_DEV_ATA
;
1690 reason
= "I/O error";
1694 /* Falling back doesn't make sense if ID data was read
1695 * successfully at least once.
1699 swap_buf_le16(id
, ATA_ID_WORDS
);
1703 reason
= "device reports invalid type";
1705 if (class == ATA_DEV_ATA
) {
1706 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1709 if (ata_id_is_ata(id
))
1713 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1716 * Drive powered-up in standby mode, and requires a specific
1717 * SET_FEATURES spin-up subcommand before it will accept
1718 * anything other than the original IDENTIFY command.
1720 ata_tf_init(dev
, &tf
);
1721 tf
.command
= ATA_CMD_SET_FEATURES
;
1722 tf
.feature
= SETFEATURES_SPINUP
;
1723 tf
.protocol
= ATA_PROT_NODATA
;
1724 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1725 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1726 if (err_mask
&& id
[2] != 0x738c) {
1728 reason
= "SPINUP failed";
1732 * If the drive initially returned incomplete IDENTIFY info,
1733 * we now must reissue the IDENTIFY command.
1735 if (id
[2] == 0x37c8)
1739 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1741 * The exact sequence expected by certain pre-ATA4 drives is:
1744 * INITIALIZE DEVICE PARAMETERS
1746 * Some drives were very specific about that exact sequence.
1748 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1749 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1752 reason
= "INIT_DEV_PARAMS failed";
1756 /* current CHS translation info (id[53-58]) might be
1757 * changed. reread the identify device info.
1759 flags
&= ~ATA_READID_POSTRESET
;
1769 if (ata_msg_warn(ap
))
1770 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1771 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1775 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1777 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1780 static void ata_dev_config_ncq(struct ata_device
*dev
,
1781 char *desc
, size_t desc_sz
)
1783 struct ata_port
*ap
= dev
->ap
;
1784 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1786 if (!ata_id_has_ncq(dev
->id
)) {
1790 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1791 snprintf(desc
, desc_sz
, "NCQ (not used)");
1794 if (ap
->flags
& ATA_FLAG_NCQ
) {
1795 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1796 dev
->flags
|= ATA_DFLAG_NCQ
;
1799 if (hdepth
>= ddepth
)
1800 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1802 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1806 * ata_dev_configure - Configure the specified ATA/ATAPI device
1807 * @dev: Target device to configure
1809 * Configure @dev according to @dev->id. Generic and low-level
1810 * driver specific fixups are also applied.
1813 * Kernel thread context (may sleep)
1816 * 0 on success, -errno otherwise
1818 int ata_dev_configure(struct ata_device
*dev
)
1820 struct ata_port
*ap
= dev
->ap
;
1821 struct ata_eh_context
*ehc
= &ap
->eh_context
;
1822 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1823 const u16
*id
= dev
->id
;
1824 unsigned int xfer_mask
;
1825 char revbuf
[7]; /* XYZ-99\0 */
1826 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1827 char modelbuf
[ATA_ID_PROD_LEN
+1];
1830 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1831 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1836 if (ata_msg_probe(ap
))
1837 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1840 dev
->horkage
|= ata_dev_blacklisted(dev
);
1842 /* let ACPI work its magic */
1843 rc
= ata_acpi_on_devcfg(dev
);
1847 /* print device capabilities */
1848 if (ata_msg_probe(ap
))
1849 ata_dev_printk(dev
, KERN_DEBUG
,
1850 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1851 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1853 id
[49], id
[82], id
[83], id
[84],
1854 id
[85], id
[86], id
[87], id
[88]);
1856 /* initialize to-be-configured parameters */
1857 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1858 dev
->max_sectors
= 0;
1866 * common ATA, ATAPI feature tests
1869 /* find max transfer mode; for printk only */
1870 xfer_mask
= ata_id_xfermask(id
);
1872 if (ata_msg_probe(ap
))
1875 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1876 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1879 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1882 /* ATA-specific feature tests */
1883 if (dev
->class == ATA_DEV_ATA
) {
1884 if (ata_id_is_cfa(id
)) {
1885 if (id
[162] & 1) /* CPRM may make this media unusable */
1886 ata_dev_printk(dev
, KERN_WARNING
,
1887 "supports DRM functions and may "
1888 "not be fully accessable.\n");
1889 snprintf(revbuf
, 7, "CFA");
1892 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1894 dev
->n_sectors
= ata_id_n_sectors(id
);
1896 if (dev
->id
[59] & 0x100)
1897 dev
->multi_count
= dev
->id
[59] & 0xff;
1899 if (ata_id_has_lba(id
)) {
1900 const char *lba_desc
;
1904 dev
->flags
|= ATA_DFLAG_LBA
;
1905 if (ata_id_has_lba48(id
)) {
1906 dev
->flags
|= ATA_DFLAG_LBA48
;
1909 if (dev
->n_sectors
>= (1UL << 28) &&
1910 ata_id_has_flush_ext(id
))
1911 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1914 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
) &&
1915 ata_id_hpa_enabled(dev
->id
))
1916 dev
->n_sectors
= ata_hpa_resize(dev
);
1919 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1921 /* print device info to dmesg */
1922 if (ata_msg_drv(ap
) && print_info
) {
1923 ata_dev_printk(dev
, KERN_INFO
,
1924 "%s: %s, %s, max %s\n",
1925 revbuf
, modelbuf
, fwrevbuf
,
1926 ata_mode_string(xfer_mask
));
1927 ata_dev_printk(dev
, KERN_INFO
,
1928 "%Lu sectors, multi %u: %s %s\n",
1929 (unsigned long long)dev
->n_sectors
,
1930 dev
->multi_count
, lba_desc
, ncq_desc
);
1935 /* Default translation */
1936 dev
->cylinders
= id
[1];
1938 dev
->sectors
= id
[6];
1940 if (ata_id_current_chs_valid(id
)) {
1941 /* Current CHS translation is valid. */
1942 dev
->cylinders
= id
[54];
1943 dev
->heads
= id
[55];
1944 dev
->sectors
= id
[56];
1947 /* print device info to dmesg */
1948 if (ata_msg_drv(ap
) && print_info
) {
1949 ata_dev_printk(dev
, KERN_INFO
,
1950 "%s: %s, %s, max %s\n",
1951 revbuf
, modelbuf
, fwrevbuf
,
1952 ata_mode_string(xfer_mask
));
1953 ata_dev_printk(dev
, KERN_INFO
,
1954 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1955 (unsigned long long)dev
->n_sectors
,
1956 dev
->multi_count
, dev
->cylinders
,
1957 dev
->heads
, dev
->sectors
);
1964 /* ATAPI-specific feature tests */
1965 else if (dev
->class == ATA_DEV_ATAPI
) {
1966 char *cdb_intr_string
= "";
1968 rc
= atapi_cdb_len(id
);
1969 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1970 if (ata_msg_warn(ap
))
1971 ata_dev_printk(dev
, KERN_WARNING
,
1972 "unsupported CDB len\n");
1976 dev
->cdb_len
= (unsigned int) rc
;
1978 if (ata_id_cdb_intr(dev
->id
)) {
1979 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1980 cdb_intr_string
= ", CDB intr";
1983 /* print device info to dmesg */
1984 if (ata_msg_drv(ap
) && print_info
)
1985 ata_dev_printk(dev
, KERN_INFO
,
1986 "ATAPI: %s, %s, max %s%s\n",
1988 ata_mode_string(xfer_mask
),
1992 /* determine max_sectors */
1993 dev
->max_sectors
= ATA_MAX_SECTORS
;
1994 if (dev
->flags
& ATA_DFLAG_LBA48
)
1995 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1997 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1998 /* Let the user know. We don't want to disallow opens for
1999 rescue purposes, or in case the vendor is just a blithering
2002 ata_dev_printk(dev
, KERN_WARNING
,
2003 "Drive reports diagnostics failure. This may indicate a drive\n");
2004 ata_dev_printk(dev
, KERN_WARNING
,
2005 "fault or invalid emulation. Contact drive vendor for information.\n");
2009 /* limit bridge transfers to udma5, 200 sectors */
2010 if (ata_dev_knobble(dev
)) {
2011 if (ata_msg_drv(ap
) && print_info
)
2012 ata_dev_printk(dev
, KERN_INFO
,
2013 "applying bridge limits\n");
2014 dev
->udma_mask
&= ATA_UDMA5
;
2015 dev
->max_sectors
= ATA_MAX_SECTORS
;
2018 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2019 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2022 if (ap
->ops
->dev_config
)
2023 ap
->ops
->dev_config(dev
);
2025 if (ata_msg_probe(ap
))
2026 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2027 __FUNCTION__
, ata_chk_status(ap
));
2031 if (ata_msg_probe(ap
))
2032 ata_dev_printk(dev
, KERN_DEBUG
,
2033 "%s: EXIT, err\n", __FUNCTION__
);
2038 * ata_cable_40wire - return 40 wire cable type
2041 * Helper method for drivers which want to hardwire 40 wire cable
2045 int ata_cable_40wire(struct ata_port
*ap
)
2047 return ATA_CBL_PATA40
;
2051 * ata_cable_80wire - return 80 wire cable type
2054 * Helper method for drivers which want to hardwire 80 wire cable
2058 int ata_cable_80wire(struct ata_port
*ap
)
2060 return ATA_CBL_PATA80
;
2064 * ata_cable_unknown - return unknown PATA cable.
2067 * Helper method for drivers which have no PATA cable detection.
2070 int ata_cable_unknown(struct ata_port
*ap
)
2072 return ATA_CBL_PATA_UNK
;
2076 * ata_cable_sata - return SATA cable type
2079 * Helper method for drivers which have SATA cables
2082 int ata_cable_sata(struct ata_port
*ap
)
2084 return ATA_CBL_SATA
;
2088 * ata_bus_probe - Reset and probe ATA bus
2091 * Master ATA bus probing function. Initiates a hardware-dependent
2092 * bus reset, then attempts to identify any devices found on
2096 * PCI/etc. bus probe sem.
2099 * Zero on success, negative errno otherwise.
2102 int ata_bus_probe(struct ata_port
*ap
)
2104 unsigned int classes
[ATA_MAX_DEVICES
];
2105 int tries
[ATA_MAX_DEVICES
];
2107 struct ata_device
*dev
;
2111 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2112 tries
[i
] = ATA_PROBE_MAX_TRIES
;
2115 /* reset and determine device classes */
2116 ap
->ops
->phy_reset(ap
);
2118 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2119 dev
= &ap
->device
[i
];
2121 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2122 dev
->class != ATA_DEV_UNKNOWN
)
2123 classes
[dev
->devno
] = dev
->class;
2125 classes
[dev
->devno
] = ATA_DEV_NONE
;
2127 dev
->class = ATA_DEV_UNKNOWN
;
2132 /* after the reset the device state is PIO 0 and the controller
2133 state is undefined. Record the mode */
2135 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2136 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
2138 /* read IDENTIFY page and configure devices. We have to do the identify
2139 specific sequence bass-ackwards so that PDIAG- is released by
2142 for (i
= ATA_MAX_DEVICES
- 1; i
>= 0; i
--) {
2143 dev
= &ap
->device
[i
];
2146 dev
->class = classes
[i
];
2148 if (!ata_dev_enabled(dev
))
2151 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2157 /* Now ask for the cable type as PDIAG- should have been released */
2158 if (ap
->ops
->cable_detect
)
2159 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2161 /* After the identify sequence we can now set up the devices. We do
2162 this in the normal order so that the user doesn't get confused */
2164 for(i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2165 dev
= &ap
->device
[i
];
2166 if (!ata_dev_enabled(dev
))
2169 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2170 rc
= ata_dev_configure(dev
);
2171 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2176 /* configure transfer mode */
2177 rc
= ata_set_mode(ap
, &dev
);
2181 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2182 if (ata_dev_enabled(&ap
->device
[i
]))
2185 /* no device present, disable port */
2186 ata_port_disable(ap
);
2187 ap
->ops
->port_disable(ap
);
2191 tries
[dev
->devno
]--;
2195 /* eeek, something went very wrong, give up */
2196 tries
[dev
->devno
] = 0;
2200 /* give it just one more chance */
2201 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2203 if (tries
[dev
->devno
] == 1) {
2204 /* This is the last chance, better to slow
2205 * down than lose it.
2207 sata_down_spd_limit(ap
);
2208 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2212 if (!tries
[dev
->devno
])
2213 ata_dev_disable(dev
);
2219 * ata_port_probe - Mark port as enabled
2220 * @ap: Port for which we indicate enablement
2222 * Modify @ap data structure such that the system
2223 * thinks that the entire port is enabled.
2225 * LOCKING: host lock, or some other form of
2229 void ata_port_probe(struct ata_port
*ap
)
2231 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2235 * sata_print_link_status - Print SATA link status
2236 * @ap: SATA port to printk link status about
2238 * This function prints link speed and status of a SATA link.
2243 void sata_print_link_status(struct ata_port
*ap
)
2245 u32 sstatus
, scontrol
, tmp
;
2247 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
2249 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
2251 if (ata_port_online(ap
)) {
2252 tmp
= (sstatus
>> 4) & 0xf;
2253 ata_port_printk(ap
, KERN_INFO
,
2254 "SATA link up %s (SStatus %X SControl %X)\n",
2255 sata_spd_string(tmp
), sstatus
, scontrol
);
2257 ata_port_printk(ap
, KERN_INFO
,
2258 "SATA link down (SStatus %X SControl %X)\n",
2264 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2265 * @ap: SATA port associated with target SATA PHY.
2267 * This function issues commands to standard SATA Sxxx
2268 * PHY registers, to wake up the phy (and device), and
2269 * clear any reset condition.
2272 * PCI/etc. bus probe sem.
2275 void __sata_phy_reset(struct ata_port
*ap
)
2278 unsigned long timeout
= jiffies
+ (HZ
* 5);
2280 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2281 /* issue phy wake/reset */
2282 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2283 /* Couldn't find anything in SATA I/II specs, but
2284 * AHCI-1.1 10.4.2 says at least 1 ms. */
2287 /* phy wake/clear reset */
2288 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2290 /* wait for phy to become ready, if necessary */
2293 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2294 if ((sstatus
& 0xf) != 1)
2296 } while (time_before(jiffies
, timeout
));
2298 /* print link status */
2299 sata_print_link_status(ap
);
2301 /* TODO: phy layer with polling, timeouts, etc. */
2302 if (!ata_port_offline(ap
))
2305 ata_port_disable(ap
);
2307 if (ap
->flags
& ATA_FLAG_DISABLED
)
2310 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2311 ata_port_disable(ap
);
2315 ap
->cbl
= ATA_CBL_SATA
;
2319 * sata_phy_reset - Reset SATA bus.
2320 * @ap: SATA port associated with target SATA PHY.
2322 * This function resets the SATA bus, and then probes
2323 * the bus for devices.
2326 * PCI/etc. bus probe sem.
2329 void sata_phy_reset(struct ata_port
*ap
)
2331 __sata_phy_reset(ap
);
2332 if (ap
->flags
& ATA_FLAG_DISABLED
)
2338 * ata_dev_pair - return other device on cable
2341 * Obtain the other device on the same cable, or if none is
2342 * present NULL is returned
2345 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2347 struct ata_port
*ap
= adev
->ap
;
2348 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2349 if (!ata_dev_enabled(pair
))
2355 * ata_port_disable - Disable port.
2356 * @ap: Port to be disabled.
2358 * Modify @ap data structure such that the system
2359 * thinks that the entire port is disabled, and should
2360 * never attempt to probe or communicate with devices
2363 * LOCKING: host lock, or some other form of
2367 void ata_port_disable(struct ata_port
*ap
)
2369 ap
->device
[0].class = ATA_DEV_NONE
;
2370 ap
->device
[1].class = ATA_DEV_NONE
;
2371 ap
->flags
|= ATA_FLAG_DISABLED
;
2375 * sata_down_spd_limit - adjust SATA spd limit downward
2376 * @ap: Port to adjust SATA spd limit for
2378 * Adjust SATA spd limit of @ap downward. Note that this
2379 * function only adjusts the limit. The change must be applied
2380 * using sata_set_spd().
2383 * Inherited from caller.
2386 * 0 on success, negative errno on failure
2388 int sata_down_spd_limit(struct ata_port
*ap
)
2390 u32 sstatus
, spd
, mask
;
2393 if (!sata_scr_valid(ap
))
2396 /* If SCR can be read, use it to determine the current SPD.
2397 * If not, use cached value in ap->sata_spd.
2399 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2401 spd
= (sstatus
>> 4) & 0xf;
2405 mask
= ap
->sata_spd_limit
;
2409 /* unconditionally mask off the highest bit */
2410 highbit
= fls(mask
) - 1;
2411 mask
&= ~(1 << highbit
);
2413 /* Mask off all speeds higher than or equal to the current
2414 * one. Force 1.5Gbps if current SPD is not available.
2417 mask
&= (1 << (spd
- 1)) - 1;
2421 /* were we already at the bottom? */
2425 ap
->sata_spd_limit
= mask
;
2427 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2428 sata_spd_string(fls(mask
)));
2433 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2437 if (ap
->sata_spd_limit
== UINT_MAX
)
2440 limit
= fls(ap
->sata_spd_limit
);
2442 spd
= (*scontrol
>> 4) & 0xf;
2443 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2445 return spd
!= limit
;
2449 * sata_set_spd_needed - is SATA spd configuration needed
2450 * @ap: Port in question
2452 * Test whether the spd limit in SControl matches
2453 * @ap->sata_spd_limit. This function is used to determine
2454 * whether hardreset is necessary to apply SATA spd
2458 * Inherited from caller.
2461 * 1 if SATA spd configuration is needed, 0 otherwise.
2463 int sata_set_spd_needed(struct ata_port
*ap
)
2467 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2470 return __sata_set_spd_needed(ap
, &scontrol
);
2474 * sata_set_spd - set SATA spd according to spd limit
2475 * @ap: Port to set SATA spd for
2477 * Set SATA spd of @ap according to sata_spd_limit.
2480 * Inherited from caller.
2483 * 0 if spd doesn't need to be changed, 1 if spd has been
2484 * changed. Negative errno if SCR registers are inaccessible.
2486 int sata_set_spd(struct ata_port
*ap
)
2491 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2494 if (!__sata_set_spd_needed(ap
, &scontrol
))
2497 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2504 * This mode timing computation functionality is ported over from
2505 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2508 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2509 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2510 * for UDMA6, which is currently supported only by Maxtor drives.
2512 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2515 static const struct ata_timing ata_timing
[] = {
2517 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2518 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2519 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2520 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2522 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2523 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2524 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2525 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2526 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2528 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2530 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2531 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2532 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2534 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2535 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2536 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2538 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2539 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2540 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2541 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2543 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2544 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2545 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2547 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2552 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2553 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2555 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2557 q
->setup
= EZ(t
->setup
* 1000, T
);
2558 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2559 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2560 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2561 q
->active
= EZ(t
->active
* 1000, T
);
2562 q
->recover
= EZ(t
->recover
* 1000, T
);
2563 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2564 q
->udma
= EZ(t
->udma
* 1000, UT
);
2567 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2568 struct ata_timing
*m
, unsigned int what
)
2570 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2571 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2572 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2573 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2574 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2575 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2576 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2577 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2580 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2582 const struct ata_timing
*t
;
2584 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2585 if (t
->mode
== 0xFF)
2590 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2591 struct ata_timing
*t
, int T
, int UT
)
2593 const struct ata_timing
*s
;
2594 struct ata_timing p
;
2600 if (!(s
= ata_timing_find_mode(speed
)))
2603 memcpy(t
, s
, sizeof(*s
));
2606 * If the drive is an EIDE drive, it can tell us it needs extended
2607 * PIO/MW_DMA cycle timing.
2610 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2611 memset(&p
, 0, sizeof(p
));
2612 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2613 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2614 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2615 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2616 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2618 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2622 * Convert the timing to bus clock counts.
2625 ata_timing_quantize(t
, t
, T
, UT
);
2628 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2629 * S.M.A.R.T * and some other commands. We have to ensure that the
2630 * DMA cycle timing is slower/equal than the fastest PIO timing.
2633 if (speed
> XFER_PIO_6
) {
2634 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2635 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2639 * Lengthen active & recovery time so that cycle time is correct.
2642 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2643 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2644 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2647 if (t
->active
+ t
->recover
< t
->cycle
) {
2648 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2649 t
->recover
= t
->cycle
- t
->active
;
2652 /* In a few cases quantisation may produce enough errors to
2653 leave t->cycle too low for the sum of active and recovery
2654 if so we must correct this */
2655 if (t
->active
+ t
->recover
> t
->cycle
)
2656 t
->cycle
= t
->active
+ t
->recover
;
2662 * ata_down_xfermask_limit - adjust dev xfer masks downward
2663 * @dev: Device to adjust xfer masks
2664 * @sel: ATA_DNXFER_* selector
2666 * Adjust xfer masks of @dev downward. Note that this function
2667 * does not apply the change. Invoking ata_set_mode() afterwards
2668 * will apply the limit.
2671 * Inherited from caller.
2674 * 0 on success, negative errno on failure
2676 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2679 unsigned int orig_mask
, xfer_mask
;
2680 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2683 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2684 sel
&= ~ATA_DNXFER_QUIET
;
2686 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2689 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2692 case ATA_DNXFER_PIO
:
2693 highbit
= fls(pio_mask
) - 1;
2694 pio_mask
&= ~(1 << highbit
);
2697 case ATA_DNXFER_DMA
:
2699 highbit
= fls(udma_mask
) - 1;
2700 udma_mask
&= ~(1 << highbit
);
2703 } else if (mwdma_mask
) {
2704 highbit
= fls(mwdma_mask
) - 1;
2705 mwdma_mask
&= ~(1 << highbit
);
2711 case ATA_DNXFER_40C
:
2712 udma_mask
&= ATA_UDMA_MASK_40C
;
2715 case ATA_DNXFER_FORCE_PIO0
:
2717 case ATA_DNXFER_FORCE_PIO
:
2726 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2728 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2732 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2733 snprintf(buf
, sizeof(buf
), "%s:%s",
2734 ata_mode_string(xfer_mask
),
2735 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2737 snprintf(buf
, sizeof(buf
), "%s",
2738 ata_mode_string(xfer_mask
));
2740 ata_dev_printk(dev
, KERN_WARNING
,
2741 "limiting speed to %s\n", buf
);
2744 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2750 static int ata_dev_set_mode(struct ata_device
*dev
)
2752 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2753 unsigned int err_mask
;
2756 dev
->flags
&= ~ATA_DFLAG_PIO
;
2757 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2758 dev
->flags
|= ATA_DFLAG_PIO
;
2760 err_mask
= ata_dev_set_xfermode(dev
);
2761 /* Old CFA may refuse this command, which is just fine */
2762 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2763 err_mask
&= ~AC_ERR_DEV
;
2766 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2767 "(err_mask=0x%x)\n", err_mask
);
2771 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2772 rc
= ata_dev_revalidate(dev
, 0);
2773 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2777 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2778 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2780 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2781 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2786 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2787 * @ap: port on which timings will be programmed
2788 * @r_failed_dev: out paramter for failed device
2790 * Standard implementation of the function used to tune and set
2791 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2792 * ata_dev_set_mode() fails, pointer to the failing device is
2793 * returned in @r_failed_dev.
2796 * PCI/etc. bus probe sem.
2799 * 0 on success, negative errno otherwise
2802 int ata_do_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2804 struct ata_device
*dev
;
2805 int i
, rc
= 0, used_dma
= 0, found
= 0;
2808 /* step 1: calculate xfer_mask */
2809 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2810 unsigned int pio_mask
, dma_mask
;
2812 dev
= &ap
->device
[i
];
2814 if (!ata_dev_enabled(dev
))
2817 ata_dev_xfermask(dev
);
2819 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2820 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2821 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2822 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2831 /* step 2: always set host PIO timings */
2832 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2833 dev
= &ap
->device
[i
];
2834 if (!ata_dev_enabled(dev
))
2837 if (!dev
->pio_mode
) {
2838 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2843 dev
->xfer_mode
= dev
->pio_mode
;
2844 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2845 if (ap
->ops
->set_piomode
)
2846 ap
->ops
->set_piomode(ap
, dev
);
2849 /* step 3: set host DMA timings */
2850 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2851 dev
= &ap
->device
[i
];
2853 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2856 dev
->xfer_mode
= dev
->dma_mode
;
2857 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2858 if (ap
->ops
->set_dmamode
)
2859 ap
->ops
->set_dmamode(ap
, dev
);
2862 /* step 4: update devices' xfer mode */
2863 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2864 dev
= &ap
->device
[i
];
2866 /* don't update suspended devices' xfer mode */
2867 if (!ata_dev_enabled(dev
))
2870 rc
= ata_dev_set_mode(dev
);
2875 /* Record simplex status. If we selected DMA then the other
2876 * host channels are not permitted to do so.
2878 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2879 ap
->host
->simplex_claimed
= ap
;
2883 *r_failed_dev
= dev
;
2888 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2889 * @ap: port on which timings will be programmed
2890 * @r_failed_dev: out paramter for failed device
2892 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2893 * ata_set_mode() fails, pointer to the failing device is
2894 * returned in @r_failed_dev.
2897 * PCI/etc. bus probe sem.
2900 * 0 on success, negative errno otherwise
2902 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2904 /* has private set_mode? */
2905 if (ap
->ops
->set_mode
)
2906 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2907 return ata_do_set_mode(ap
, r_failed_dev
);
2911 * ata_tf_to_host - issue ATA taskfile to host controller
2912 * @ap: port to which command is being issued
2913 * @tf: ATA taskfile register set
2915 * Issues ATA taskfile register set to ATA host controller,
2916 * with proper synchronization with interrupt handler and
2920 * spin_lock_irqsave(host lock)
2923 static inline void ata_tf_to_host(struct ata_port
*ap
,
2924 const struct ata_taskfile
*tf
)
2926 ap
->ops
->tf_load(ap
, tf
);
2927 ap
->ops
->exec_command(ap
, tf
);
2931 * ata_busy_sleep - sleep until BSY clears, or timeout
2932 * @ap: port containing status register to be polled
2933 * @tmout_pat: impatience timeout
2934 * @tmout: overall timeout
2936 * Sleep until ATA Status register bit BSY clears,
2937 * or a timeout occurs.
2940 * Kernel thread context (may sleep).
2943 * 0 on success, -errno otherwise.
2945 int ata_busy_sleep(struct ata_port
*ap
,
2946 unsigned long tmout_pat
, unsigned long tmout
)
2948 unsigned long timer_start
, timeout
;
2951 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2952 timer_start
= jiffies
;
2953 timeout
= timer_start
+ tmout_pat
;
2954 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2955 time_before(jiffies
, timeout
)) {
2957 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2960 if (status
!= 0xff && (status
& ATA_BUSY
))
2961 ata_port_printk(ap
, KERN_WARNING
,
2962 "port is slow to respond, please be patient "
2963 "(Status 0x%x)\n", status
);
2965 timeout
= timer_start
+ tmout
;
2966 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2967 time_before(jiffies
, timeout
)) {
2969 status
= ata_chk_status(ap
);
2975 if (status
& ATA_BUSY
) {
2976 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2977 "(%lu secs, Status 0x%x)\n",
2978 tmout
/ HZ
, status
);
2986 * ata_wait_ready - sleep until BSY clears, or timeout
2987 * @ap: port containing status register to be polled
2988 * @deadline: deadline jiffies for the operation
2990 * Sleep until ATA Status register bit BSY clears, or timeout
2994 * Kernel thread context (may sleep).
2997 * 0 on success, -errno otherwise.
2999 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3001 unsigned long start
= jiffies
;
3005 u8 status
= ata_chk_status(ap
);
3006 unsigned long now
= jiffies
;
3008 if (!(status
& ATA_BUSY
))
3010 if (!ata_port_online(ap
) && status
== 0xff)
3012 if (time_after(now
, deadline
))
3015 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3016 (deadline
- now
> 3 * HZ
)) {
3017 ata_port_printk(ap
, KERN_WARNING
,
3018 "port is slow to respond, please be patient "
3019 "(Status 0x%x)\n", status
);
3027 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3028 unsigned long deadline
)
3030 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3031 unsigned int dev0
= devmask
& (1 << 0);
3032 unsigned int dev1
= devmask
& (1 << 1);
3035 /* if device 0 was found in ata_devchk, wait for its
3039 rc
= ata_wait_ready(ap
, deadline
);
3047 /* if device 1 was found in ata_devchk, wait for register
3048 * access briefly, then wait for BSY to clear.
3053 ap
->ops
->dev_select(ap
, 1);
3055 /* Wait for register access. Some ATAPI devices fail
3056 * to set nsect/lbal after reset, so don't waste too
3057 * much time on it. We're gonna wait for !BSY anyway.
3059 for (i
= 0; i
< 2; i
++) {
3062 nsect
= ioread8(ioaddr
->nsect_addr
);
3063 lbal
= ioread8(ioaddr
->lbal_addr
);
3064 if ((nsect
== 1) && (lbal
== 1))
3066 msleep(50); /* give drive a breather */
3069 rc
= ata_wait_ready(ap
, deadline
);
3077 /* is all this really necessary? */
3078 ap
->ops
->dev_select(ap
, 0);
3080 ap
->ops
->dev_select(ap
, 1);
3082 ap
->ops
->dev_select(ap
, 0);
3087 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3088 unsigned long deadline
)
3090 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3092 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3094 /* software reset. causes dev0 to be selected */
3095 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3096 udelay(20); /* FIXME: flush */
3097 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3098 udelay(20); /* FIXME: flush */
3099 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3101 /* spec mandates ">= 2ms" before checking status.
3102 * We wait 150ms, because that was the magic delay used for
3103 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3104 * between when the ATA command register is written, and then
3105 * status is checked. Because waiting for "a while" before
3106 * checking status is fine, post SRST, we perform this magic
3107 * delay here as well.
3109 * Old drivers/ide uses the 2mS rule and then waits for ready
3113 /* Before we perform post reset processing we want to see if
3114 * the bus shows 0xFF because the odd clown forgets the D7
3115 * pulldown resistor.
3117 if (ata_check_status(ap
) == 0xFF)
3120 return ata_bus_post_reset(ap
, devmask
, deadline
);
3124 * ata_bus_reset - reset host port and associated ATA channel
3125 * @ap: port to reset
3127 * This is typically the first time we actually start issuing
3128 * commands to the ATA channel. We wait for BSY to clear, then
3129 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3130 * result. Determine what devices, if any, are on the channel
3131 * by looking at the device 0/1 error register. Look at the signature
3132 * stored in each device's taskfile registers, to determine if
3133 * the device is ATA or ATAPI.
3136 * PCI/etc. bus probe sem.
3137 * Obtains host lock.
3140 * Sets ATA_FLAG_DISABLED if bus reset fails.
3143 void ata_bus_reset(struct ata_port
*ap
)
3145 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3146 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3148 unsigned int dev0
, dev1
= 0, devmask
= 0;
3151 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3153 /* determine if device 0/1 are present */
3154 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3157 dev0
= ata_devchk(ap
, 0);
3159 dev1
= ata_devchk(ap
, 1);
3163 devmask
|= (1 << 0);
3165 devmask
|= (1 << 1);
3167 /* select device 0 again */
3168 ap
->ops
->dev_select(ap
, 0);
3170 /* issue bus reset */
3171 if (ap
->flags
& ATA_FLAG_SRST
) {
3172 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3173 if (rc
&& rc
!= -ENODEV
)
3178 * determine by signature whether we have ATA or ATAPI devices
3180 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
3181 if ((slave_possible
) && (err
!= 0x81))
3182 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
3184 /* is double-select really necessary? */
3185 if (ap
->device
[1].class != ATA_DEV_NONE
)
3186 ap
->ops
->dev_select(ap
, 1);
3187 if (ap
->device
[0].class != ATA_DEV_NONE
)
3188 ap
->ops
->dev_select(ap
, 0);
3190 /* if no devices were detected, disable this port */
3191 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
3192 (ap
->device
[1].class == ATA_DEV_NONE
))
3195 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3196 /* set up device control for ATA_FLAG_SATA_RESET */
3197 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3204 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3205 ap
->ops
->port_disable(ap
);
3211 * sata_phy_debounce - debounce SATA phy status
3212 * @ap: ATA port to debounce SATA phy status for
3213 * @params: timing parameters { interval, duratinon, timeout } in msec
3214 * @deadline: deadline jiffies for the operation
3216 * Make sure SStatus of @ap reaches stable state, determined by
3217 * holding the same value where DET is not 1 for @duration polled
3218 * every @interval, before @timeout. Timeout constraints the
3219 * beginning of the stable state. Because DET gets stuck at 1 on
3220 * some controllers after hot unplugging, this functions waits
3221 * until timeout then returns 0 if DET is stable at 1.
3223 * @timeout is further limited by @deadline. The sooner of the
3227 * Kernel thread context (may sleep)
3230 * 0 on success, -errno on failure.
3232 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
,
3233 unsigned long deadline
)
3235 unsigned long interval_msec
= params
[0];
3236 unsigned long duration
= msecs_to_jiffies(params
[1]);
3237 unsigned long last_jiffies
, t
;
3241 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3242 if (time_before(t
, deadline
))
3245 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3250 last_jiffies
= jiffies
;
3253 msleep(interval_msec
);
3254 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3260 if (cur
== 1 && time_before(jiffies
, deadline
))
3262 if (time_after(jiffies
, last_jiffies
+ duration
))
3267 /* unstable, start over */
3269 last_jiffies
= jiffies
;
3271 /* Check deadline. If debouncing failed, return
3272 * -EPIPE to tell upper layer to lower link speed.
3274 if (time_after(jiffies
, deadline
))
3280 * sata_phy_resume - resume SATA phy
3281 * @ap: ATA port to resume SATA phy for
3282 * @params: timing parameters { interval, duratinon, timeout } in msec
3283 * @deadline: deadline jiffies for the operation
3285 * Resume SATA phy of @ap and debounce it.
3288 * Kernel thread context (may sleep)
3291 * 0 on success, -errno on failure.
3293 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
,
3294 unsigned long deadline
)
3299 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3302 scontrol
= (scontrol
& 0x0f0) | 0x300;
3304 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3307 /* Some PHYs react badly if SStatus is pounded immediately
3308 * after resuming. Delay 200ms before debouncing.
3312 return sata_phy_debounce(ap
, params
, deadline
);
3316 * ata_std_prereset - prepare for reset
3317 * @ap: ATA port to be reset
3318 * @deadline: deadline jiffies for the operation
3320 * @ap is about to be reset. Initialize it. Failure from
3321 * prereset makes libata abort whole reset sequence and give up
3322 * that port, so prereset should be best-effort. It does its
3323 * best to prepare for reset sequence but if things go wrong, it
3324 * should just whine, not fail.
3327 * Kernel thread context (may sleep)
3330 * 0 on success, -errno otherwise.
3332 int ata_std_prereset(struct ata_port
*ap
, unsigned long deadline
)
3334 struct ata_eh_context
*ehc
= &ap
->eh_context
;
3335 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3338 /* handle link resume */
3339 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3340 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
3341 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3343 /* if we're about to do hardreset, nothing more to do */
3344 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3347 /* if SATA, resume phy */
3348 if (ap
->flags
& ATA_FLAG_SATA
) {
3349 rc
= sata_phy_resume(ap
, timing
, deadline
);
3350 /* whine about phy resume failure but proceed */
3351 if (rc
&& rc
!= -EOPNOTSUPP
)
3352 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
3353 "link for reset (errno=%d)\n", rc
);
3356 /* Wait for !BSY if the controller can wait for the first D2H
3357 * Reg FIS and we don't know that no device is attached.
3359 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
)) {
3360 rc
= ata_wait_ready(ap
, deadline
);
3361 if (rc
&& rc
!= -ENODEV
) {
3362 ata_port_printk(ap
, KERN_WARNING
, "device not ready "
3363 "(errno=%d), forcing hardreset\n", rc
);
3364 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3372 * ata_std_softreset - reset host port via ATA SRST
3373 * @ap: port to reset
3374 * @classes: resulting classes of attached devices
3375 * @deadline: deadline jiffies for the operation
3377 * Reset host port using ATA SRST.
3380 * Kernel thread context (may sleep)
3383 * 0 on success, -errno otherwise.
3385 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
,
3386 unsigned long deadline
)
3388 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3389 unsigned int devmask
= 0;
3395 if (ata_port_offline(ap
)) {
3396 classes
[0] = ATA_DEV_NONE
;
3400 /* determine if device 0/1 are present */
3401 if (ata_devchk(ap
, 0))
3402 devmask
|= (1 << 0);
3403 if (slave_possible
&& ata_devchk(ap
, 1))
3404 devmask
|= (1 << 1);
3406 /* select device 0 again */
3407 ap
->ops
->dev_select(ap
, 0);
3409 /* issue bus reset */
3410 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3411 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3412 /* if link is occupied, -ENODEV too is an error */
3413 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(ap
))) {
3414 ata_port_printk(ap
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3418 /* determine by signature whether we have ATA or ATAPI devices */
3419 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3420 if (slave_possible
&& err
!= 0x81)
3421 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3424 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3429 * sata_port_hardreset - reset port via SATA phy reset
3430 * @ap: port to reset
3431 * @timing: timing parameters { interval, duratinon, timeout } in msec
3432 * @deadline: deadline jiffies for the operation
3434 * SATA phy-reset host port using DET bits of SControl register.
3437 * Kernel thread context (may sleep)
3440 * 0 on success, -errno otherwise.
3442 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
,
3443 unsigned long deadline
)
3450 if (sata_set_spd_needed(ap
)) {
3451 /* SATA spec says nothing about how to reconfigure
3452 * spd. To be on the safe side, turn off phy during
3453 * reconfiguration. This works for at least ICH7 AHCI
3456 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3459 scontrol
= (scontrol
& 0x0f0) | 0x304;
3461 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3467 /* issue phy wake/reset */
3468 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3471 scontrol
= (scontrol
& 0x0f0) | 0x301;
3473 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3476 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3477 * 10.4.2 says at least 1 ms.
3481 /* bring phy back */
3482 rc
= sata_phy_resume(ap
, timing
, deadline
);
3484 DPRINTK("EXIT, rc=%d\n", rc
);
3489 * sata_std_hardreset - reset host port via SATA phy reset
3490 * @ap: port to reset
3491 * @class: resulting class of attached device
3492 * @deadline: deadline jiffies for the operation
3494 * SATA phy-reset host port using DET bits of SControl register,
3495 * wait for !BSY and classify the attached device.
3498 * Kernel thread context (may sleep)
3501 * 0 on success, -errno otherwise.
3503 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class,
3504 unsigned long deadline
)
3506 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3512 rc
= sata_port_hardreset(ap
, timing
, deadline
);
3514 ata_port_printk(ap
, KERN_ERR
,
3515 "COMRESET failed (errno=%d)\n", rc
);
3519 /* TODO: phy layer with polling, timeouts, etc. */
3520 if (ata_port_offline(ap
)) {
3521 *class = ATA_DEV_NONE
;
3522 DPRINTK("EXIT, link offline\n");
3526 /* wait a while before checking status, see SRST for more info */
3529 rc
= ata_wait_ready(ap
, deadline
);
3530 /* link occupied, -ENODEV too is an error */
3532 ata_port_printk(ap
, KERN_ERR
,
3533 "COMRESET failed (errno=%d)\n", rc
);
3537 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3539 *class = ata_dev_try_classify(ap
, 0, NULL
);
3541 DPRINTK("EXIT, class=%u\n", *class);
3546 * ata_std_postreset - standard postreset callback
3547 * @ap: the target ata_port
3548 * @classes: classes of attached devices
3550 * This function is invoked after a successful reset. Note that
3551 * the device might have been reset more than once using
3552 * different reset methods before postreset is invoked.
3555 * Kernel thread context (may sleep)
3557 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3563 /* print link status */
3564 sata_print_link_status(ap
);
3567 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3568 sata_scr_write(ap
, SCR_ERROR
, serror
);
3570 /* is double-select really necessary? */
3571 if (classes
[0] != ATA_DEV_NONE
)
3572 ap
->ops
->dev_select(ap
, 1);
3573 if (classes
[1] != ATA_DEV_NONE
)
3574 ap
->ops
->dev_select(ap
, 0);
3576 /* bail out if no device is present */
3577 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3578 DPRINTK("EXIT, no device\n");
3582 /* set up device control */
3583 if (ap
->ioaddr
.ctl_addr
)
3584 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3590 * ata_dev_same_device - Determine whether new ID matches configured device
3591 * @dev: device to compare against
3592 * @new_class: class of the new device
3593 * @new_id: IDENTIFY page of the new device
3595 * Compare @new_class and @new_id against @dev and determine
3596 * whether @dev is the device indicated by @new_class and
3603 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3605 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3608 const u16
*old_id
= dev
->id
;
3609 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3610 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3612 if (dev
->class != new_class
) {
3613 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3614 dev
->class, new_class
);
3618 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3619 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3620 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3621 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3623 if (strcmp(model
[0], model
[1])) {
3624 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3625 "'%s' != '%s'\n", model
[0], model
[1]);
3629 if (strcmp(serial
[0], serial
[1])) {
3630 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3631 "'%s' != '%s'\n", serial
[0], serial
[1]);
3639 * ata_dev_reread_id - Re-read IDENTIFY data
3640 * @dev: target ATA device
3641 * @readid_flags: read ID flags
3643 * Re-read IDENTIFY page and make sure @dev is still attached to
3647 * Kernel thread context (may sleep)
3650 * 0 on success, negative errno otherwise
3652 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3654 unsigned int class = dev
->class;
3655 u16
*id
= (void *)dev
->ap
->sector_buf
;
3659 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3663 /* is the device still there? */
3664 if (!ata_dev_same_device(dev
, class, id
))
3667 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3672 * ata_dev_revalidate - Revalidate ATA device
3673 * @dev: device to revalidate
3674 * @readid_flags: read ID flags
3676 * Re-read IDENTIFY page, make sure @dev is still attached to the
3677 * port and reconfigure it according to the new IDENTIFY page.
3680 * Kernel thread context (may sleep)
3683 * 0 on success, negative errno otherwise
3685 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3687 u64 n_sectors
= dev
->n_sectors
;
3690 if (!ata_dev_enabled(dev
))
3694 rc
= ata_dev_reread_id(dev
, readid_flags
);
3698 /* configure device according to the new ID */
3699 rc
= ata_dev_configure(dev
);
3703 /* verify n_sectors hasn't changed */
3704 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3705 dev
->n_sectors
!= n_sectors
) {
3706 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3708 (unsigned long long)n_sectors
,
3709 (unsigned long long)dev
->n_sectors
);
3711 /* restore original n_sectors */
3712 dev
->n_sectors
= n_sectors
;
3721 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3725 struct ata_blacklist_entry
{
3726 const char *model_num
;
3727 const char *model_rev
;
3728 unsigned long horkage
;
3731 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3732 /* Devices with DMA related problems under Linux */
3733 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3734 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3735 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3736 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3737 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3738 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3739 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3740 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3741 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3742 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3743 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3744 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3745 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3746 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3747 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3748 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3749 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3750 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3751 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3752 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3753 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3754 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3755 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3756 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3757 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3758 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3759 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3760 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3761 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3762 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3763 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3764 { "IOMEGA ZIP 250 ATAPI Floppy",
3765 NULL
, ATA_HORKAGE_NODMA
},
3767 /* Weird ATAPI devices */
3768 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3770 /* Devices we expect to fail diagnostics */
3772 /* Devices where NCQ should be avoided */
3774 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3775 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3776 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3778 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3779 { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ
},
3780 { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ
},
3781 { "Maxtor 7B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
, },
3782 { "Maxtor 7B300S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3783 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3784 { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
3785 ATA_HORKAGE_NONCQ
},
3786 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3787 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3788 /* Blacklist entries taken from Silicon Image 3124/3132
3789 Windows driver .inf file - also several Linux problem reports */
3790 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3791 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3792 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3793 /* Drives which do spurious command completion */
3794 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3795 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3796 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3797 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3798 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3799 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3800 { "ST3160812AS", "3.AD", ATA_HORKAGE_NONCQ
, },
3801 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3803 /* devices which puke on READ_NATIVE_MAX */
3804 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3805 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3806 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3807 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3813 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3815 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3816 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3817 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3819 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3820 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3822 while (ad
->model_num
) {
3823 if (!strcmp(ad
->model_num
, model_num
)) {
3824 if (ad
->model_rev
== NULL
)
3826 if (!strcmp(ad
->model_rev
, model_rev
))
3834 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3836 /* We don't support polling DMA.
3837 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3838 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3840 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3841 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3843 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
3847 * ata_dev_xfermask - Compute supported xfermask of the given device
3848 * @dev: Device to compute xfermask for
3850 * Compute supported xfermask of @dev and store it in
3851 * dev->*_mask. This function is responsible for applying all
3852 * known limits including host controller limits, device
3858 static void ata_dev_xfermask(struct ata_device
*dev
)
3860 struct ata_port
*ap
= dev
->ap
;
3861 struct ata_host
*host
= ap
->host
;
3862 unsigned long xfer_mask
;
3864 /* controller modes available */
3865 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3866 ap
->mwdma_mask
, ap
->udma_mask
);
3868 /* drive modes available */
3869 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3870 dev
->mwdma_mask
, dev
->udma_mask
);
3871 xfer_mask
&= ata_id_xfermask(dev
->id
);
3874 * CFA Advanced TrueIDE timings are not allowed on a shared
3877 if (ata_dev_pair(dev
)) {
3878 /* No PIO5 or PIO6 */
3879 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3880 /* No MWDMA3 or MWDMA 4 */
3881 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3884 if (ata_dma_blacklisted(dev
)) {
3885 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3886 ata_dev_printk(dev
, KERN_WARNING
,
3887 "device is on DMA blacklist, disabling DMA\n");
3890 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3891 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3892 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3893 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3894 "other device, disabling DMA\n");
3897 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3898 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3900 if (ap
->ops
->mode_filter
)
3901 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3903 /* Apply cable rule here. Don't apply it early because when
3904 * we handle hot plug the cable type can itself change.
3905 * Check this last so that we know if the transfer rate was
3906 * solely limited by the cable.
3907 * Unknown or 80 wire cables reported host side are checked
3908 * drive side as well. Cases where we know a 40wire cable
3909 * is used safely for 80 are not checked here.
3911 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3912 /* UDMA/44 or higher would be available */
3913 if((ap
->cbl
== ATA_CBL_PATA40
) ||
3914 (ata_drive_40wire(dev
->id
) &&
3915 (ap
->cbl
== ATA_CBL_PATA_UNK
||
3916 ap
->cbl
== ATA_CBL_PATA80
))) {
3917 ata_dev_printk(dev
, KERN_WARNING
,
3918 "limited to UDMA/33 due to 40-wire cable\n");
3919 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3922 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3923 &dev
->mwdma_mask
, &dev
->udma_mask
);
3927 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3928 * @dev: Device to which command will be sent
3930 * Issue SET FEATURES - XFER MODE command to device @dev
3934 * PCI/etc. bus probe sem.
3937 * 0 on success, AC_ERR_* mask otherwise.
3940 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3942 struct ata_taskfile tf
;
3943 unsigned int err_mask
;
3945 /* set up set-features taskfile */
3946 DPRINTK("set features - xfer mode\n");
3948 /* Some controllers and ATAPI devices show flaky interrupt
3949 * behavior after setting xfer mode. Use polling instead.
3951 ata_tf_init(dev
, &tf
);
3952 tf
.command
= ATA_CMD_SET_FEATURES
;
3953 tf
.feature
= SETFEATURES_XFER
;
3954 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
3955 tf
.protocol
= ATA_PROT_NODATA
;
3956 tf
.nsect
= dev
->xfer_mode
;
3958 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3960 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3965 * ata_dev_init_params - Issue INIT DEV PARAMS command
3966 * @dev: Device to which command will be sent
3967 * @heads: Number of heads (taskfile parameter)
3968 * @sectors: Number of sectors (taskfile parameter)
3971 * Kernel thread context (may sleep)
3974 * 0 on success, AC_ERR_* mask otherwise.
3976 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3977 u16 heads
, u16 sectors
)
3979 struct ata_taskfile tf
;
3980 unsigned int err_mask
;
3982 /* Number of sectors per track 1-255. Number of heads 1-16 */
3983 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3984 return AC_ERR_INVALID
;
3986 /* set up init dev params taskfile */
3987 DPRINTK("init dev params \n");
3989 ata_tf_init(dev
, &tf
);
3990 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3991 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3992 tf
.protocol
= ATA_PROT_NODATA
;
3994 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3996 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3997 /* A clean abort indicates an original or just out of spec drive
3998 and we should continue as we issue the setup based on the
3999 drive reported working geometry */
4000 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4003 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4008 * ata_sg_clean - Unmap DMA memory associated with command
4009 * @qc: Command containing DMA memory to be released
4011 * Unmap all mapped DMA memory associated with this command.
4014 * spin_lock_irqsave(host lock)
4016 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4018 struct ata_port
*ap
= qc
->ap
;
4019 struct scatterlist
*sg
= qc
->__sg
;
4020 int dir
= qc
->dma_dir
;
4021 void *pad_buf
= NULL
;
4023 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4024 WARN_ON(sg
== NULL
);
4026 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4027 WARN_ON(qc
->n_elem
> 1);
4029 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4031 /* if we padded the buffer out to 32-bit bound, and data
4032 * xfer direction is from-device, we must copy from the
4033 * pad buffer back into the supplied buffer
4035 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4036 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4038 if (qc
->flags
& ATA_QCFLAG_SG
) {
4040 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4041 /* restore last sg */
4042 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4044 struct scatterlist
*psg
= &qc
->pad_sgent
;
4045 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4046 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4047 kunmap_atomic(addr
, KM_IRQ0
);
4051 dma_unmap_single(ap
->dev
,
4052 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4055 sg
->length
+= qc
->pad_len
;
4057 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4058 pad_buf
, qc
->pad_len
);
4061 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4066 * ata_fill_sg - Fill PCI IDE PRD table
4067 * @qc: Metadata associated with taskfile to be transferred
4069 * Fill PCI IDE PRD (scatter-gather) table with segments
4070 * associated with the current disk command.
4073 * spin_lock_irqsave(host lock)
4076 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4078 struct ata_port
*ap
= qc
->ap
;
4079 struct scatterlist
*sg
;
4082 WARN_ON(qc
->__sg
== NULL
);
4083 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4086 ata_for_each_sg(sg
, qc
) {
4090 /* determine if physical DMA addr spans 64K boundary.
4091 * Note h/w doesn't support 64-bit, so we unconditionally
4092 * truncate dma_addr_t to u32.
4094 addr
= (u32
) sg_dma_address(sg
);
4095 sg_len
= sg_dma_len(sg
);
4098 offset
= addr
& 0xffff;
4100 if ((offset
+ sg_len
) > 0x10000)
4101 len
= 0x10000 - offset
;
4103 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4104 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4105 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4114 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4118 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4119 * @qc: Metadata associated with taskfile to be transferred
4121 * Fill PCI IDE PRD (scatter-gather) table with segments
4122 * associated with the current disk command. Perform the fill
4123 * so that we avoid writing any length 64K records for
4124 * controllers that don't follow the spec.
4127 * spin_lock_irqsave(host lock)
4130 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4132 struct ata_port
*ap
= qc
->ap
;
4133 struct scatterlist
*sg
;
4136 WARN_ON(qc
->__sg
== NULL
);
4137 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4140 ata_for_each_sg(sg
, qc
) {
4142 u32 sg_len
, len
, blen
;
4144 /* determine if physical DMA addr spans 64K boundary.
4145 * Note h/w doesn't support 64-bit, so we unconditionally
4146 * truncate dma_addr_t to u32.
4148 addr
= (u32
) sg_dma_address(sg
);
4149 sg_len
= sg_dma_len(sg
);
4152 offset
= addr
& 0xffff;
4154 if ((offset
+ sg_len
) > 0x10000)
4155 len
= 0x10000 - offset
;
4157 blen
= len
& 0xffff;
4158 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4160 /* Some PATA chipsets like the CS5530 can't
4161 cope with 0x0000 meaning 64K as the spec says */
4162 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4164 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4166 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4167 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4176 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4180 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4181 * @qc: Metadata associated with taskfile to check
4183 * Allow low-level driver to filter ATA PACKET commands, returning
4184 * a status indicating whether or not it is OK to use DMA for the
4185 * supplied PACKET command.
4188 * spin_lock_irqsave(host lock)
4190 * RETURNS: 0 when ATAPI DMA can be used
4193 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4195 struct ata_port
*ap
= qc
->ap
;
4197 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4198 * few ATAPI devices choke on such DMA requests.
4200 if (unlikely(qc
->nbytes
& 15))
4203 if (ap
->ops
->check_atapi_dma
)
4204 return ap
->ops
->check_atapi_dma(qc
);
4210 * ata_qc_prep - Prepare taskfile for submission
4211 * @qc: Metadata associated with taskfile to be prepared
4213 * Prepare ATA taskfile for submission.
4216 * spin_lock_irqsave(host lock)
4218 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4220 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4227 * ata_dumb_qc_prep - Prepare taskfile for submission
4228 * @qc: Metadata associated with taskfile to be prepared
4230 * Prepare ATA taskfile for submission.
4233 * spin_lock_irqsave(host lock)
4235 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4237 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4240 ata_fill_sg_dumb(qc
);
4243 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4246 * ata_sg_init_one - Associate command with memory buffer
4247 * @qc: Command to be associated
4248 * @buf: Memory buffer
4249 * @buflen: Length of memory buffer, in bytes.
4251 * Initialize the data-related elements of queued_cmd @qc
4252 * to point to a single memory buffer, @buf of byte length @buflen.
4255 * spin_lock_irqsave(host lock)
4258 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4260 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4262 qc
->__sg
= &qc
->sgent
;
4264 qc
->orig_n_elem
= 1;
4266 qc
->nbytes
= buflen
;
4268 sg_init_one(&qc
->sgent
, buf
, buflen
);
4272 * ata_sg_init - Associate command with scatter-gather table.
4273 * @qc: Command to be associated
4274 * @sg: Scatter-gather table.
4275 * @n_elem: Number of elements in s/g table.
4277 * Initialize the data-related elements of queued_cmd @qc
4278 * to point to a scatter-gather table @sg, containing @n_elem
4282 * spin_lock_irqsave(host lock)
4285 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4286 unsigned int n_elem
)
4288 qc
->flags
|= ATA_QCFLAG_SG
;
4290 qc
->n_elem
= n_elem
;
4291 qc
->orig_n_elem
= n_elem
;
4295 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4296 * @qc: Command with memory buffer to be mapped.
4298 * DMA-map the memory buffer associated with queued_cmd @qc.
4301 * spin_lock_irqsave(host lock)
4304 * Zero on success, negative on error.
4307 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4309 struct ata_port
*ap
= qc
->ap
;
4310 int dir
= qc
->dma_dir
;
4311 struct scatterlist
*sg
= qc
->__sg
;
4312 dma_addr_t dma_address
;
4315 /* we must lengthen transfers to end on a 32-bit boundary */
4316 qc
->pad_len
= sg
->length
& 3;
4318 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4319 struct scatterlist
*psg
= &qc
->pad_sgent
;
4321 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4323 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4325 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4326 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4329 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4330 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4332 sg
->length
-= qc
->pad_len
;
4333 if (sg
->length
== 0)
4336 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4337 sg
->length
, qc
->pad_len
);
4345 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4347 if (dma_mapping_error(dma_address
)) {
4349 sg
->length
+= qc
->pad_len
;
4353 sg_dma_address(sg
) = dma_address
;
4354 sg_dma_len(sg
) = sg
->length
;
4357 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4358 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4364 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4365 * @qc: Command with scatter-gather table to be mapped.
4367 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4370 * spin_lock_irqsave(host lock)
4373 * Zero on success, negative on error.
4377 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4379 struct ata_port
*ap
= qc
->ap
;
4380 struct scatterlist
*sg
= qc
->__sg
;
4381 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4382 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4384 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4385 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4387 /* we must lengthen transfers to end on a 32-bit boundary */
4388 qc
->pad_len
= lsg
->length
& 3;
4390 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4391 struct scatterlist
*psg
= &qc
->pad_sgent
;
4392 unsigned int offset
;
4394 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4396 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4399 * psg->page/offset are used to copy to-be-written
4400 * data in this function or read data in ata_sg_clean.
4402 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4403 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4404 psg
->offset
= offset_in_page(offset
);
4406 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4407 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4408 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4409 kunmap_atomic(addr
, KM_IRQ0
);
4412 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4413 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4415 lsg
->length
-= qc
->pad_len
;
4416 if (lsg
->length
== 0)
4419 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4420 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4423 pre_n_elem
= qc
->n_elem
;
4424 if (trim_sg
&& pre_n_elem
)
4433 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4435 /* restore last sg */
4436 lsg
->length
+= qc
->pad_len
;
4440 DPRINTK("%d sg elements mapped\n", n_elem
);
4443 qc
->n_elem
= n_elem
;
4449 * swap_buf_le16 - swap halves of 16-bit words in place
4450 * @buf: Buffer to swap
4451 * @buf_words: Number of 16-bit words in buffer.
4453 * Swap halves of 16-bit words if needed to convert from
4454 * little-endian byte order to native cpu byte order, or
4458 * Inherited from caller.
4460 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4465 for (i
= 0; i
< buf_words
; i
++)
4466 buf
[i
] = le16_to_cpu(buf
[i
]);
4467 #endif /* __BIG_ENDIAN */
4471 * ata_data_xfer - Transfer data by PIO
4472 * @adev: device to target
4474 * @buflen: buffer length
4475 * @write_data: read/write
4477 * Transfer data from/to the device data register by PIO.
4480 * Inherited from caller.
4482 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4483 unsigned int buflen
, int write_data
)
4485 struct ata_port
*ap
= adev
->ap
;
4486 unsigned int words
= buflen
>> 1;
4488 /* Transfer multiple of 2 bytes */
4490 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4492 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4494 /* Transfer trailing 1 byte, if any. */
4495 if (unlikely(buflen
& 0x01)) {
4496 u16 align_buf
[1] = { 0 };
4497 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4500 memcpy(align_buf
, trailing_buf
, 1);
4501 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4503 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4504 memcpy(trailing_buf
, align_buf
, 1);
4510 * ata_data_xfer_noirq - Transfer data by PIO
4511 * @adev: device to target
4513 * @buflen: buffer length
4514 * @write_data: read/write
4516 * Transfer data from/to the device data register by PIO. Do the
4517 * transfer with interrupts disabled.
4520 * Inherited from caller.
4522 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4523 unsigned int buflen
, int write_data
)
4525 unsigned long flags
;
4526 local_irq_save(flags
);
4527 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4528 local_irq_restore(flags
);
4533 * ata_pio_sector - Transfer a sector of data.
4534 * @qc: Command on going
4536 * Transfer qc->sect_size bytes of data from/to the ATA device.
4539 * Inherited from caller.
4542 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4544 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4545 struct scatterlist
*sg
= qc
->__sg
;
4546 struct ata_port
*ap
= qc
->ap
;
4548 unsigned int offset
;
4551 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4552 ap
->hsm_task_state
= HSM_ST_LAST
;
4554 page
= sg
[qc
->cursg
].page
;
4555 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4557 /* get the current page and offset */
4558 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4559 offset
%= PAGE_SIZE
;
4561 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4563 if (PageHighMem(page
)) {
4564 unsigned long flags
;
4566 /* FIXME: use a bounce buffer */
4567 local_irq_save(flags
);
4568 buf
= kmap_atomic(page
, KM_IRQ0
);
4570 /* do the actual data transfer */
4571 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4573 kunmap_atomic(buf
, KM_IRQ0
);
4574 local_irq_restore(flags
);
4576 buf
= page_address(page
);
4577 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4580 qc
->curbytes
+= qc
->sect_size
;
4581 qc
->cursg_ofs
+= qc
->sect_size
;
4583 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4590 * ata_pio_sectors - Transfer one or many sectors.
4591 * @qc: Command on going
4593 * Transfer one or many sectors of data from/to the
4594 * ATA device for the DRQ request.
4597 * Inherited from caller.
4600 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4602 if (is_multi_taskfile(&qc
->tf
)) {
4603 /* READ/WRITE MULTIPLE */
4606 WARN_ON(qc
->dev
->multi_count
== 0);
4608 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4609 qc
->dev
->multi_count
);
4617 * atapi_send_cdb - Write CDB bytes to hardware
4618 * @ap: Port to which ATAPI device is attached.
4619 * @qc: Taskfile currently active
4621 * When device has indicated its readiness to accept
4622 * a CDB, this function is called. Send the CDB.
4628 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4631 DPRINTK("send cdb\n");
4632 WARN_ON(qc
->dev
->cdb_len
< 12);
4634 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4635 ata_altstatus(ap
); /* flush */
4637 switch (qc
->tf
.protocol
) {
4638 case ATA_PROT_ATAPI
:
4639 ap
->hsm_task_state
= HSM_ST
;
4641 case ATA_PROT_ATAPI_NODATA
:
4642 ap
->hsm_task_state
= HSM_ST_LAST
;
4644 case ATA_PROT_ATAPI_DMA
:
4645 ap
->hsm_task_state
= HSM_ST_LAST
;
4646 /* initiate bmdma */
4647 ap
->ops
->bmdma_start(qc
);
4653 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4654 * @qc: Command on going
4655 * @bytes: number of bytes
4657 * Transfer Transfer data from/to the ATAPI device.
4660 * Inherited from caller.
4664 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4666 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4667 struct scatterlist
*sg
= qc
->__sg
;
4668 struct ata_port
*ap
= qc
->ap
;
4671 unsigned int offset
, count
;
4673 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4674 ap
->hsm_task_state
= HSM_ST_LAST
;
4677 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4679 * The end of qc->sg is reached and the device expects
4680 * more data to transfer. In order not to overrun qc->sg
4681 * and fulfill length specified in the byte count register,
4682 * - for read case, discard trailing data from the device
4683 * - for write case, padding zero data to the device
4685 u16 pad_buf
[1] = { 0 };
4686 unsigned int words
= bytes
>> 1;
4689 if (words
) /* warning if bytes > 1 */
4690 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4691 "%u bytes trailing data\n", bytes
);
4693 for (i
= 0; i
< words
; i
++)
4694 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4696 ap
->hsm_task_state
= HSM_ST_LAST
;
4700 sg
= &qc
->__sg
[qc
->cursg
];
4703 offset
= sg
->offset
+ qc
->cursg_ofs
;
4705 /* get the current page and offset */
4706 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4707 offset
%= PAGE_SIZE
;
4709 /* don't overrun current sg */
4710 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4712 /* don't cross page boundaries */
4713 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4715 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4717 if (PageHighMem(page
)) {
4718 unsigned long flags
;
4720 /* FIXME: use bounce buffer */
4721 local_irq_save(flags
);
4722 buf
= kmap_atomic(page
, KM_IRQ0
);
4724 /* do the actual data transfer */
4725 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4727 kunmap_atomic(buf
, KM_IRQ0
);
4728 local_irq_restore(flags
);
4730 buf
= page_address(page
);
4731 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4735 qc
->curbytes
+= count
;
4736 qc
->cursg_ofs
+= count
;
4738 if (qc
->cursg_ofs
== sg
->length
) {
4748 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4749 * @qc: Command on going
4751 * Transfer Transfer data from/to the ATAPI device.
4754 * Inherited from caller.
4757 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4759 struct ata_port
*ap
= qc
->ap
;
4760 struct ata_device
*dev
= qc
->dev
;
4761 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4762 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4764 /* Abuse qc->result_tf for temp storage of intermediate TF
4765 * here to save some kernel stack usage.
4766 * For normal completion, qc->result_tf is not relevant. For
4767 * error, qc->result_tf is later overwritten by ata_qc_complete().
4768 * So, the correctness of qc->result_tf is not affected.
4770 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4771 ireason
= qc
->result_tf
.nsect
;
4772 bc_lo
= qc
->result_tf
.lbam
;
4773 bc_hi
= qc
->result_tf
.lbah
;
4774 bytes
= (bc_hi
<< 8) | bc_lo
;
4776 /* shall be cleared to zero, indicating xfer of data */
4777 if (ireason
& (1 << 0))
4780 /* make sure transfer direction matches expected */
4781 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4782 if (do_write
!= i_write
)
4785 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4787 __atapi_pio_bytes(qc
, bytes
);
4792 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4793 qc
->err_mask
|= AC_ERR_HSM
;
4794 ap
->hsm_task_state
= HSM_ST_ERR
;
4798 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4799 * @ap: the target ata_port
4803 * 1 if ok in workqueue, 0 otherwise.
4806 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4808 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4811 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4812 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4813 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4816 if (is_atapi_taskfile(&qc
->tf
) &&
4817 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4825 * ata_hsm_qc_complete - finish a qc running on standard HSM
4826 * @qc: Command to complete
4827 * @in_wq: 1 if called from workqueue, 0 otherwise
4829 * Finish @qc which is running on standard HSM.
4832 * If @in_wq is zero, spin_lock_irqsave(host lock).
4833 * Otherwise, none on entry and grabs host lock.
4835 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4837 struct ata_port
*ap
= qc
->ap
;
4838 unsigned long flags
;
4840 if (ap
->ops
->error_handler
) {
4842 spin_lock_irqsave(ap
->lock
, flags
);
4844 /* EH might have kicked in while host lock is
4847 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4849 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4850 ap
->ops
->irq_on(ap
);
4851 ata_qc_complete(qc
);
4853 ata_port_freeze(ap
);
4856 spin_unlock_irqrestore(ap
->lock
, flags
);
4858 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4859 ata_qc_complete(qc
);
4861 ata_port_freeze(ap
);
4865 spin_lock_irqsave(ap
->lock
, flags
);
4866 ap
->ops
->irq_on(ap
);
4867 ata_qc_complete(qc
);
4868 spin_unlock_irqrestore(ap
->lock
, flags
);
4870 ata_qc_complete(qc
);
4875 * ata_hsm_move - move the HSM to the next state.
4876 * @ap: the target ata_port
4878 * @status: current device status
4879 * @in_wq: 1 if called from workqueue, 0 otherwise
4882 * 1 when poll next status needed, 0 otherwise.
4884 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4885 u8 status
, int in_wq
)
4887 unsigned long flags
= 0;
4890 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4892 /* Make sure ata_qc_issue_prot() does not throw things
4893 * like DMA polling into the workqueue. Notice that
4894 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4896 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4899 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4900 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4902 switch (ap
->hsm_task_state
) {
4904 /* Send first data block or PACKET CDB */
4906 /* If polling, we will stay in the work queue after
4907 * sending the data. Otherwise, interrupt handler
4908 * takes over after sending the data.
4910 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4912 /* check device status */
4913 if (unlikely((status
& ATA_DRQ
) == 0)) {
4914 /* handle BSY=0, DRQ=0 as error */
4915 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4916 /* device stops HSM for abort/error */
4917 qc
->err_mask
|= AC_ERR_DEV
;
4919 /* HSM violation. Let EH handle this */
4920 qc
->err_mask
|= AC_ERR_HSM
;
4922 ap
->hsm_task_state
= HSM_ST_ERR
;
4926 /* Device should not ask for data transfer (DRQ=1)
4927 * when it finds something wrong.
4928 * We ignore DRQ here and stop the HSM by
4929 * changing hsm_task_state to HSM_ST_ERR and
4930 * let the EH abort the command or reset the device.
4932 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4933 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4934 "error, dev_stat 0x%X\n", status
);
4935 qc
->err_mask
|= AC_ERR_HSM
;
4936 ap
->hsm_task_state
= HSM_ST_ERR
;
4940 /* Send the CDB (atapi) or the first data block (ata pio out).
4941 * During the state transition, interrupt handler shouldn't
4942 * be invoked before the data transfer is complete and
4943 * hsm_task_state is changed. Hence, the following locking.
4946 spin_lock_irqsave(ap
->lock
, flags
);
4948 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4949 /* PIO data out protocol.
4950 * send first data block.
4953 /* ata_pio_sectors() might change the state
4954 * to HSM_ST_LAST. so, the state is changed here
4955 * before ata_pio_sectors().
4957 ap
->hsm_task_state
= HSM_ST
;
4958 ata_pio_sectors(qc
);
4959 ata_altstatus(ap
); /* flush */
4962 atapi_send_cdb(ap
, qc
);
4965 spin_unlock_irqrestore(ap
->lock
, flags
);
4967 /* if polling, ata_pio_task() handles the rest.
4968 * otherwise, interrupt handler takes over from here.
4973 /* complete command or read/write the data register */
4974 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4975 /* ATAPI PIO protocol */
4976 if ((status
& ATA_DRQ
) == 0) {
4977 /* No more data to transfer or device error.
4978 * Device error will be tagged in HSM_ST_LAST.
4980 ap
->hsm_task_state
= HSM_ST_LAST
;
4984 /* Device should not ask for data transfer (DRQ=1)
4985 * when it finds something wrong.
4986 * We ignore DRQ here and stop the HSM by
4987 * changing hsm_task_state to HSM_ST_ERR and
4988 * let the EH abort the command or reset the device.
4990 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4991 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
4992 "device error, dev_stat 0x%X\n",
4994 qc
->err_mask
|= AC_ERR_HSM
;
4995 ap
->hsm_task_state
= HSM_ST_ERR
;
4999 atapi_pio_bytes(qc
);
5001 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5002 /* bad ireason reported by device */
5006 /* ATA PIO protocol */
5007 if (unlikely((status
& ATA_DRQ
) == 0)) {
5008 /* handle BSY=0, DRQ=0 as error */
5009 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5010 /* device stops HSM for abort/error */
5011 qc
->err_mask
|= AC_ERR_DEV
;
5013 /* HSM violation. Let EH handle this.
5014 * Phantom devices also trigger this
5015 * condition. Mark hint.
5017 qc
->err_mask
|= AC_ERR_HSM
|
5020 ap
->hsm_task_state
= HSM_ST_ERR
;
5024 /* For PIO reads, some devices may ask for
5025 * data transfer (DRQ=1) alone with ERR=1.
5026 * We respect DRQ here and transfer one
5027 * block of junk data before changing the
5028 * hsm_task_state to HSM_ST_ERR.
5030 * For PIO writes, ERR=1 DRQ=1 doesn't make
5031 * sense since the data block has been
5032 * transferred to the device.
5034 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5035 /* data might be corrputed */
5036 qc
->err_mask
|= AC_ERR_DEV
;
5038 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5039 ata_pio_sectors(qc
);
5041 status
= ata_wait_idle(ap
);
5044 if (status
& (ATA_BUSY
| ATA_DRQ
))
5045 qc
->err_mask
|= AC_ERR_HSM
;
5047 /* ata_pio_sectors() might change the
5048 * state to HSM_ST_LAST. so, the state
5049 * is changed after ata_pio_sectors().
5051 ap
->hsm_task_state
= HSM_ST_ERR
;
5055 ata_pio_sectors(qc
);
5057 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5058 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5061 status
= ata_wait_idle(ap
);
5066 ata_altstatus(ap
); /* flush */
5071 if (unlikely(!ata_ok(status
))) {
5072 qc
->err_mask
|= __ac_err_mask(status
);
5073 ap
->hsm_task_state
= HSM_ST_ERR
;
5077 /* no more data to transfer */
5078 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5079 ap
->print_id
, qc
->dev
->devno
, status
);
5081 WARN_ON(qc
->err_mask
);
5083 ap
->hsm_task_state
= HSM_ST_IDLE
;
5085 /* complete taskfile transaction */
5086 ata_hsm_qc_complete(qc
, in_wq
);
5092 /* make sure qc->err_mask is available to
5093 * know what's wrong and recover
5095 WARN_ON(qc
->err_mask
== 0);
5097 ap
->hsm_task_state
= HSM_ST_IDLE
;
5099 /* complete taskfile transaction */
5100 ata_hsm_qc_complete(qc
, in_wq
);
5112 static void ata_pio_task(struct work_struct
*work
)
5114 struct ata_port
*ap
=
5115 container_of(work
, struct ata_port
, port_task
.work
);
5116 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5121 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5124 * This is purely heuristic. This is a fast path.
5125 * Sometimes when we enter, BSY will be cleared in
5126 * a chk-status or two. If not, the drive is probably seeking
5127 * or something. Snooze for a couple msecs, then
5128 * chk-status again. If still busy, queue delayed work.
5130 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5131 if (status
& ATA_BUSY
) {
5133 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5134 if (status
& ATA_BUSY
) {
5135 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5141 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5143 /* another command or interrupt handler
5144 * may be running at this point.
5151 * ata_qc_new - Request an available ATA command, for queueing
5152 * @ap: Port associated with device @dev
5153 * @dev: Device from whom we request an available command structure
5159 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5161 struct ata_queued_cmd
*qc
= NULL
;
5164 /* no command while frozen */
5165 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5168 /* the last tag is reserved for internal command. */
5169 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5170 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5171 qc
= __ata_qc_from_tag(ap
, i
);
5182 * ata_qc_new_init - Request an available ATA command, and initialize it
5183 * @dev: Device from whom we request an available command structure
5189 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5191 struct ata_port
*ap
= dev
->ap
;
5192 struct ata_queued_cmd
*qc
;
5194 qc
= ata_qc_new(ap
);
5207 * ata_qc_free - free unused ata_queued_cmd
5208 * @qc: Command to complete
5210 * Designed to free unused ata_queued_cmd object
5211 * in case something prevents using it.
5214 * spin_lock_irqsave(host lock)
5216 void ata_qc_free(struct ata_queued_cmd
*qc
)
5218 struct ata_port
*ap
= qc
->ap
;
5221 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5225 if (likely(ata_tag_valid(tag
))) {
5226 qc
->tag
= ATA_TAG_POISON
;
5227 clear_bit(tag
, &ap
->qc_allocated
);
5231 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5233 struct ata_port
*ap
= qc
->ap
;
5235 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5236 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5238 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5241 /* command should be marked inactive atomically with qc completion */
5242 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
5243 ap
->sactive
&= ~(1 << qc
->tag
);
5245 ap
->active_tag
= ATA_TAG_POISON
;
5247 /* atapi: mark qc as inactive to prevent the interrupt handler
5248 * from completing the command twice later, before the error handler
5249 * is called. (when rc != 0 and atapi request sense is needed)
5251 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5252 ap
->qc_active
&= ~(1 << qc
->tag
);
5254 /* call completion callback */
5255 qc
->complete_fn(qc
);
5258 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5260 struct ata_port
*ap
= qc
->ap
;
5262 qc
->result_tf
.flags
= qc
->tf
.flags
;
5263 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5267 * ata_qc_complete - Complete an active ATA command
5268 * @qc: Command to complete
5269 * @err_mask: ATA Status register contents
5271 * Indicate to the mid and upper layers that an ATA
5272 * command has completed, with either an ok or not-ok status.
5275 * spin_lock_irqsave(host lock)
5277 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5279 struct ata_port
*ap
= qc
->ap
;
5281 /* XXX: New EH and old EH use different mechanisms to
5282 * synchronize EH with regular execution path.
5284 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5285 * Normal execution path is responsible for not accessing a
5286 * failed qc. libata core enforces the rule by returning NULL
5287 * from ata_qc_from_tag() for failed qcs.
5289 * Old EH depends on ata_qc_complete() nullifying completion
5290 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5291 * not synchronize with interrupt handler. Only PIO task is
5294 if (ap
->ops
->error_handler
) {
5295 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5297 if (unlikely(qc
->err_mask
))
5298 qc
->flags
|= ATA_QCFLAG_FAILED
;
5300 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5301 if (!ata_tag_internal(qc
->tag
)) {
5302 /* always fill result TF for failed qc */
5304 ata_qc_schedule_eh(qc
);
5309 /* read result TF if requested */
5310 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5313 __ata_qc_complete(qc
);
5315 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5318 /* read result TF if failed or requested */
5319 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5322 __ata_qc_complete(qc
);
5327 * ata_qc_complete_multiple - Complete multiple qcs successfully
5328 * @ap: port in question
5329 * @qc_active: new qc_active mask
5330 * @finish_qc: LLDD callback invoked before completing a qc
5332 * Complete in-flight commands. This functions is meant to be
5333 * called from low-level driver's interrupt routine to complete
5334 * requests normally. ap->qc_active and @qc_active is compared
5335 * and commands are completed accordingly.
5338 * spin_lock_irqsave(host lock)
5341 * Number of completed commands on success, -errno otherwise.
5343 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5344 void (*finish_qc
)(struct ata_queued_cmd
*))
5350 done_mask
= ap
->qc_active
^ qc_active
;
5352 if (unlikely(done_mask
& qc_active
)) {
5353 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5354 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5358 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5359 struct ata_queued_cmd
*qc
;
5361 if (!(done_mask
& (1 << i
)))
5364 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5367 ata_qc_complete(qc
);
5375 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5377 struct ata_port
*ap
= qc
->ap
;
5379 switch (qc
->tf
.protocol
) {
5382 case ATA_PROT_ATAPI_DMA
:
5385 case ATA_PROT_ATAPI
:
5387 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5400 * ata_qc_issue - issue taskfile to device
5401 * @qc: command to issue to device
5403 * Prepare an ATA command to submission to device.
5404 * This includes mapping the data into a DMA-able
5405 * area, filling in the S/G table, and finally
5406 * writing the taskfile to hardware, starting the command.
5409 * spin_lock_irqsave(host lock)
5411 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5413 struct ata_port
*ap
= qc
->ap
;
5415 /* Make sure only one non-NCQ command is outstanding. The
5416 * check is skipped for old EH because it reuses active qc to
5417 * request ATAPI sense.
5419 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
5421 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5422 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
5423 ap
->sactive
|= 1 << qc
->tag
;
5425 WARN_ON(ap
->sactive
);
5426 ap
->active_tag
= qc
->tag
;
5429 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5430 ap
->qc_active
|= 1 << qc
->tag
;
5432 if (ata_should_dma_map(qc
)) {
5433 if (qc
->flags
& ATA_QCFLAG_SG
) {
5434 if (ata_sg_setup(qc
))
5436 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5437 if (ata_sg_setup_one(qc
))
5441 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5444 ap
->ops
->qc_prep(qc
);
5446 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5447 if (unlikely(qc
->err_mask
))
5452 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5453 qc
->err_mask
|= AC_ERR_SYSTEM
;
5455 ata_qc_complete(qc
);
5459 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5460 * @qc: command to issue to device
5462 * Using various libata functions and hooks, this function
5463 * starts an ATA command. ATA commands are grouped into
5464 * classes called "protocols", and issuing each type of protocol
5465 * is slightly different.
5467 * May be used as the qc_issue() entry in ata_port_operations.
5470 * spin_lock_irqsave(host lock)
5473 * Zero on success, AC_ERR_* mask on failure
5476 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5478 struct ata_port
*ap
= qc
->ap
;
5480 /* Use polling pio if the LLD doesn't handle
5481 * interrupt driven pio and atapi CDB interrupt.
5483 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5484 switch (qc
->tf
.protocol
) {
5486 case ATA_PROT_NODATA
:
5487 case ATA_PROT_ATAPI
:
5488 case ATA_PROT_ATAPI_NODATA
:
5489 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5491 case ATA_PROT_ATAPI_DMA
:
5492 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5493 /* see ata_dma_blacklisted() */
5501 /* select the device */
5502 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5504 /* start the command */
5505 switch (qc
->tf
.protocol
) {
5506 case ATA_PROT_NODATA
:
5507 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5508 ata_qc_set_polling(qc
);
5510 ata_tf_to_host(ap
, &qc
->tf
);
5511 ap
->hsm_task_state
= HSM_ST_LAST
;
5513 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5514 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5519 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5521 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5522 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5523 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5524 ap
->hsm_task_state
= HSM_ST_LAST
;
5528 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5529 ata_qc_set_polling(qc
);
5531 ata_tf_to_host(ap
, &qc
->tf
);
5533 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5534 /* PIO data out protocol */
5535 ap
->hsm_task_state
= HSM_ST_FIRST
;
5536 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5538 /* always send first data block using
5539 * the ata_pio_task() codepath.
5542 /* PIO data in protocol */
5543 ap
->hsm_task_state
= HSM_ST
;
5545 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5546 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5548 /* if polling, ata_pio_task() handles the rest.
5549 * otherwise, interrupt handler takes over from here.
5555 case ATA_PROT_ATAPI
:
5556 case ATA_PROT_ATAPI_NODATA
:
5557 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5558 ata_qc_set_polling(qc
);
5560 ata_tf_to_host(ap
, &qc
->tf
);
5562 ap
->hsm_task_state
= HSM_ST_FIRST
;
5564 /* send cdb by polling if no cdb interrupt */
5565 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5566 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5567 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5570 case ATA_PROT_ATAPI_DMA
:
5571 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5573 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5574 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5575 ap
->hsm_task_state
= HSM_ST_FIRST
;
5577 /* send cdb by polling if no cdb interrupt */
5578 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5579 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5584 return AC_ERR_SYSTEM
;
5591 * ata_host_intr - Handle host interrupt for given (port, task)
5592 * @ap: Port on which interrupt arrived (possibly...)
5593 * @qc: Taskfile currently active in engine
5595 * Handle host interrupt for given queued command. Currently,
5596 * only DMA interrupts are handled. All other commands are
5597 * handled via polling with interrupts disabled (nIEN bit).
5600 * spin_lock_irqsave(host lock)
5603 * One if interrupt was handled, zero if not (shared irq).
5606 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5607 struct ata_queued_cmd
*qc
)
5609 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5610 u8 status
, host_stat
= 0;
5612 VPRINTK("ata%u: protocol %d task_state %d\n",
5613 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5615 /* Check whether we are expecting interrupt in this state */
5616 switch (ap
->hsm_task_state
) {
5618 /* Some pre-ATAPI-4 devices assert INTRQ
5619 * at this state when ready to receive CDB.
5622 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5623 * The flag was turned on only for atapi devices.
5624 * No need to check is_atapi_taskfile(&qc->tf) again.
5626 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5630 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5631 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5632 /* check status of DMA engine */
5633 host_stat
= ap
->ops
->bmdma_status(ap
);
5634 VPRINTK("ata%u: host_stat 0x%X\n",
5635 ap
->print_id
, host_stat
);
5637 /* if it's not our irq... */
5638 if (!(host_stat
& ATA_DMA_INTR
))
5641 /* before we do anything else, clear DMA-Start bit */
5642 ap
->ops
->bmdma_stop(qc
);
5644 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5645 /* error when transfering data to/from memory */
5646 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5647 ap
->hsm_task_state
= HSM_ST_ERR
;
5657 /* check altstatus */
5658 status
= ata_altstatus(ap
);
5659 if (status
& ATA_BUSY
)
5662 /* check main status, clearing INTRQ */
5663 status
= ata_chk_status(ap
);
5664 if (unlikely(status
& ATA_BUSY
))
5667 /* ack bmdma irq events */
5668 ap
->ops
->irq_clear(ap
);
5670 ata_hsm_move(ap
, qc
, status
, 0);
5672 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5673 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5674 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5676 return 1; /* irq handled */
5679 ap
->stats
.idle_irq
++;
5682 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5683 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5684 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5688 return 0; /* irq not handled */
5692 * ata_interrupt - Default ATA host interrupt handler
5693 * @irq: irq line (unused)
5694 * @dev_instance: pointer to our ata_host information structure
5696 * Default interrupt handler for PCI IDE devices. Calls
5697 * ata_host_intr() for each port that is not disabled.
5700 * Obtains host lock during operation.
5703 * IRQ_NONE or IRQ_HANDLED.
5706 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5708 struct ata_host
*host
= dev_instance
;
5710 unsigned int handled
= 0;
5711 unsigned long flags
;
5713 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5714 spin_lock_irqsave(&host
->lock
, flags
);
5716 for (i
= 0; i
< host
->n_ports
; i
++) {
5717 struct ata_port
*ap
;
5719 ap
= host
->ports
[i
];
5721 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5722 struct ata_queued_cmd
*qc
;
5724 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5725 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5726 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5727 handled
|= ata_host_intr(ap
, qc
);
5731 spin_unlock_irqrestore(&host
->lock
, flags
);
5733 return IRQ_RETVAL(handled
);
5737 * sata_scr_valid - test whether SCRs are accessible
5738 * @ap: ATA port to test SCR accessibility for
5740 * Test whether SCRs are accessible for @ap.
5746 * 1 if SCRs are accessible, 0 otherwise.
5748 int sata_scr_valid(struct ata_port
*ap
)
5750 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5754 * sata_scr_read - read SCR register of the specified port
5755 * @ap: ATA port to read SCR for
5757 * @val: Place to store read value
5759 * Read SCR register @reg of @ap into *@val. This function is
5760 * guaranteed to succeed if the cable type of the port is SATA
5761 * and the port implements ->scr_read.
5767 * 0 on success, negative errno on failure.
5769 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5771 if (sata_scr_valid(ap
))
5772 return ap
->ops
->scr_read(ap
, reg
, val
);
5777 * sata_scr_write - write SCR register of the specified port
5778 * @ap: ATA port to write SCR for
5779 * @reg: SCR to write
5780 * @val: value to write
5782 * Write @val to SCR register @reg of @ap. This function is
5783 * guaranteed to succeed if the cable type of the port is SATA
5784 * and the port implements ->scr_read.
5790 * 0 on success, negative errno on failure.
5792 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5794 if (sata_scr_valid(ap
))
5795 return ap
->ops
->scr_write(ap
, reg
, val
);
5800 * sata_scr_write_flush - write SCR register of the specified port and flush
5801 * @ap: ATA port to write SCR for
5802 * @reg: SCR to write
5803 * @val: value to write
5805 * This function is identical to sata_scr_write() except that this
5806 * function performs flush after writing to the register.
5812 * 0 on success, negative errno on failure.
5814 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5818 if (sata_scr_valid(ap
)) {
5819 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
5821 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
5828 * ata_port_online - test whether the given port is online
5829 * @ap: ATA port to test
5831 * Test whether @ap is online. Note that this function returns 0
5832 * if online status of @ap cannot be obtained, so
5833 * ata_port_online(ap) != !ata_port_offline(ap).
5839 * 1 if the port online status is available and online.
5841 int ata_port_online(struct ata_port
*ap
)
5845 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5851 * ata_port_offline - test whether the given port is offline
5852 * @ap: ATA port to test
5854 * Test whether @ap is offline. Note that this function returns
5855 * 0 if offline status of @ap cannot be obtained, so
5856 * ata_port_online(ap) != !ata_port_offline(ap).
5862 * 1 if the port offline status is available and offline.
5864 int ata_port_offline(struct ata_port
*ap
)
5868 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5873 int ata_flush_cache(struct ata_device
*dev
)
5875 unsigned int err_mask
;
5878 if (!ata_try_flush_cache(dev
))
5881 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5882 cmd
= ATA_CMD_FLUSH_EXT
;
5884 cmd
= ATA_CMD_FLUSH
;
5886 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5888 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5896 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5897 unsigned int action
, unsigned int ehi_flags
,
5900 unsigned long flags
;
5903 for (i
= 0; i
< host
->n_ports
; i
++) {
5904 struct ata_port
*ap
= host
->ports
[i
];
5906 /* Previous resume operation might still be in
5907 * progress. Wait for PM_PENDING to clear.
5909 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5910 ata_port_wait_eh(ap
);
5911 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5914 /* request PM ops to EH */
5915 spin_lock_irqsave(ap
->lock
, flags
);
5920 ap
->pm_result
= &rc
;
5923 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5924 ap
->eh_info
.action
|= action
;
5925 ap
->eh_info
.flags
|= ehi_flags
;
5927 ata_port_schedule_eh(ap
);
5929 spin_unlock_irqrestore(ap
->lock
, flags
);
5931 /* wait and check result */
5933 ata_port_wait_eh(ap
);
5934 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5944 * ata_host_suspend - suspend host
5945 * @host: host to suspend
5948 * Suspend @host. Actual operation is performed by EH. This
5949 * function requests EH to perform PM operations and waits for EH
5953 * Kernel thread context (may sleep).
5956 * 0 on success, -errno on failure.
5958 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5962 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5964 host
->dev
->power
.power_state
= mesg
;
5969 * ata_host_resume - resume host
5970 * @host: host to resume
5972 * Resume @host. Actual operation is performed by EH. This
5973 * function requests EH to perform PM operations and returns.
5974 * Note that all resume operations are performed parallely.
5977 * Kernel thread context (may sleep).
5979 void ata_host_resume(struct ata_host
*host
)
5981 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5982 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5983 host
->dev
->power
.power_state
= PMSG_ON
;
5988 * ata_port_start - Set port up for dma.
5989 * @ap: Port to initialize
5991 * Called just after data structures for each port are
5992 * initialized. Allocates space for PRD table.
5994 * May be used as the port_start() entry in ata_port_operations.
5997 * Inherited from caller.
5999 int ata_port_start(struct ata_port
*ap
)
6001 struct device
*dev
= ap
->dev
;
6004 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6009 rc
= ata_pad_alloc(ap
, dev
);
6013 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6014 (unsigned long long)ap
->prd_dma
);
6019 * ata_dev_init - Initialize an ata_device structure
6020 * @dev: Device structure to initialize
6022 * Initialize @dev in preparation for probing.
6025 * Inherited from caller.
6027 void ata_dev_init(struct ata_device
*dev
)
6029 struct ata_port
*ap
= dev
->ap
;
6030 unsigned long flags
;
6032 /* SATA spd limit is bound to the first device */
6033 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
6036 /* High bits of dev->flags are used to record warm plug
6037 * requests which occur asynchronously. Synchronize using
6040 spin_lock_irqsave(ap
->lock
, flags
);
6041 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6043 spin_unlock_irqrestore(ap
->lock
, flags
);
6045 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6046 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6047 dev
->pio_mask
= UINT_MAX
;
6048 dev
->mwdma_mask
= UINT_MAX
;
6049 dev
->udma_mask
= UINT_MAX
;
6053 * ata_port_alloc - allocate and initialize basic ATA port resources
6054 * @host: ATA host this allocated port belongs to
6056 * Allocate and initialize basic ATA port resources.
6059 * Allocate ATA port on success, NULL on failure.
6062 * Inherited from calling layer (may sleep).
6064 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6066 struct ata_port
*ap
;
6071 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6075 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6076 ap
->lock
= &host
->lock
;
6077 ap
->flags
= ATA_FLAG_DISABLED
;
6079 ap
->ctl
= ATA_DEVCTL_OBS
;
6081 ap
->dev
= host
->dev
;
6083 ap
->hw_sata_spd_limit
= UINT_MAX
;
6084 ap
->active_tag
= ATA_TAG_POISON
;
6085 ap
->last_ctl
= 0xFF;
6087 #if defined(ATA_VERBOSE_DEBUG)
6088 /* turn on all debugging levels */
6089 ap
->msg_enable
= 0x00FF;
6090 #elif defined(ATA_DEBUG)
6091 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6093 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6096 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6097 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6098 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6099 INIT_LIST_HEAD(&ap
->eh_done_q
);
6100 init_waitqueue_head(&ap
->eh_wait_q
);
6101 init_timer_deferrable(&ap
->fastdrain_timer
);
6102 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6103 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6105 ap
->cbl
= ATA_CBL_NONE
;
6107 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6108 struct ata_device
*dev
= &ap
->device
[i
];
6115 ap
->stats
.unhandled_irq
= 1;
6116 ap
->stats
.idle_irq
= 1;
6121 static void ata_host_release(struct device
*gendev
, void *res
)
6123 struct ata_host
*host
= dev_get_drvdata(gendev
);
6126 for (i
= 0; i
< host
->n_ports
; i
++) {
6127 struct ata_port
*ap
= host
->ports
[i
];
6132 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6133 ap
->ops
->port_stop(ap
);
6136 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6137 host
->ops
->host_stop(host
);
6139 for (i
= 0; i
< host
->n_ports
; i
++) {
6140 struct ata_port
*ap
= host
->ports
[i
];
6146 scsi_host_put(ap
->scsi_host
);
6149 host
->ports
[i
] = NULL
;
6152 dev_set_drvdata(gendev
, NULL
);
6156 * ata_host_alloc - allocate and init basic ATA host resources
6157 * @dev: generic device this host is associated with
6158 * @max_ports: maximum number of ATA ports associated with this host
6160 * Allocate and initialize basic ATA host resources. LLD calls
6161 * this function to allocate a host, initializes it fully and
6162 * attaches it using ata_host_register().
6164 * @max_ports ports are allocated and host->n_ports is
6165 * initialized to @max_ports. The caller is allowed to decrease
6166 * host->n_ports before calling ata_host_register(). The unused
6167 * ports will be automatically freed on registration.
6170 * Allocate ATA host on success, NULL on failure.
6173 * Inherited from calling layer (may sleep).
6175 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6177 struct ata_host
*host
;
6183 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6186 /* alloc a container for our list of ATA ports (buses) */
6187 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6188 /* alloc a container for our list of ATA ports (buses) */
6189 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6193 devres_add(dev
, host
);
6194 dev_set_drvdata(dev
, host
);
6196 spin_lock_init(&host
->lock
);
6198 host
->n_ports
= max_ports
;
6200 /* allocate ports bound to this host */
6201 for (i
= 0; i
< max_ports
; i
++) {
6202 struct ata_port
*ap
;
6204 ap
= ata_port_alloc(host
);
6209 host
->ports
[i
] = ap
;
6212 devres_remove_group(dev
, NULL
);
6216 devres_release_group(dev
, NULL
);
6221 * ata_host_alloc_pinfo - alloc host and init with port_info array
6222 * @dev: generic device this host is associated with
6223 * @ppi: array of ATA port_info to initialize host with
6224 * @n_ports: number of ATA ports attached to this host
6226 * Allocate ATA host and initialize with info from @ppi. If NULL
6227 * terminated, @ppi may contain fewer entries than @n_ports. The
6228 * last entry will be used for the remaining ports.
6231 * Allocate ATA host on success, NULL on failure.
6234 * Inherited from calling layer (may sleep).
6236 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6237 const struct ata_port_info
* const * ppi
,
6240 const struct ata_port_info
*pi
;
6241 struct ata_host
*host
;
6244 host
= ata_host_alloc(dev
, n_ports
);
6248 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6249 struct ata_port
*ap
= host
->ports
[i
];
6254 ap
->pio_mask
= pi
->pio_mask
;
6255 ap
->mwdma_mask
= pi
->mwdma_mask
;
6256 ap
->udma_mask
= pi
->udma_mask
;
6257 ap
->flags
|= pi
->flags
;
6258 ap
->ops
= pi
->port_ops
;
6260 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6261 host
->ops
= pi
->port_ops
;
6262 if (!host
->private_data
&& pi
->private_data
)
6263 host
->private_data
= pi
->private_data
;
6270 * ata_host_start - start and freeze ports of an ATA host
6271 * @host: ATA host to start ports for
6273 * Start and then freeze ports of @host. Started status is
6274 * recorded in host->flags, so this function can be called
6275 * multiple times. Ports are guaranteed to get started only
6276 * once. If host->ops isn't initialized yet, its set to the
6277 * first non-dummy port ops.
6280 * Inherited from calling layer (may sleep).
6283 * 0 if all ports are started successfully, -errno otherwise.
6285 int ata_host_start(struct ata_host
*host
)
6289 if (host
->flags
& ATA_HOST_STARTED
)
6292 for (i
= 0; i
< host
->n_ports
; i
++) {
6293 struct ata_port
*ap
= host
->ports
[i
];
6295 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6296 host
->ops
= ap
->ops
;
6298 if (ap
->ops
->port_start
) {
6299 rc
= ap
->ops
->port_start(ap
);
6301 ata_port_printk(ap
, KERN_ERR
, "failed to "
6302 "start port (errno=%d)\n", rc
);
6307 ata_eh_freeze_port(ap
);
6310 host
->flags
|= ATA_HOST_STARTED
;
6315 struct ata_port
*ap
= host
->ports
[i
];
6317 if (ap
->ops
->port_stop
)
6318 ap
->ops
->port_stop(ap
);
6324 * ata_sas_host_init - Initialize a host struct
6325 * @host: host to initialize
6326 * @dev: device host is attached to
6327 * @flags: host flags
6331 * PCI/etc. bus probe sem.
6334 /* KILLME - the only user left is ipr */
6335 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6336 unsigned long flags
, const struct ata_port_operations
*ops
)
6338 spin_lock_init(&host
->lock
);
6340 host
->flags
= flags
;
6345 * ata_host_register - register initialized ATA host
6346 * @host: ATA host to register
6347 * @sht: template for SCSI host
6349 * Register initialized ATA host. @host is allocated using
6350 * ata_host_alloc() and fully initialized by LLD. This function
6351 * starts ports, registers @host with ATA and SCSI layers and
6352 * probe registered devices.
6355 * Inherited from calling layer (may sleep).
6358 * 0 on success, -errno otherwise.
6360 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6364 /* host must have been started */
6365 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6366 dev_printk(KERN_ERR
, host
->dev
,
6367 "BUG: trying to register unstarted host\n");
6372 /* Blow away unused ports. This happens when LLD can't
6373 * determine the exact number of ports to allocate at
6376 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6377 kfree(host
->ports
[i
]);
6379 /* give ports names and add SCSI hosts */
6380 for (i
= 0; i
< host
->n_ports
; i
++)
6381 host
->ports
[i
]->print_id
= ata_print_id
++;
6383 rc
= ata_scsi_add_hosts(host
, sht
);
6387 /* associate with ACPI nodes */
6388 ata_acpi_associate(host
);
6390 /* set cable, sata_spd_limit and report */
6391 for (i
= 0; i
< host
->n_ports
; i
++) {
6392 struct ata_port
*ap
= host
->ports
[i
];
6395 unsigned long xfer_mask
;
6397 /* set SATA cable type if still unset */
6398 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6399 ap
->cbl
= ATA_CBL_SATA
;
6401 /* init sata_spd_limit to the current value */
6402 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
6403 int spd
= (scontrol
>> 4) & 0xf;
6405 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6407 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
6409 /* report the secondary IRQ for second channel legacy */
6410 irq_line
= host
->irq
;
6411 if (i
== 1 && host
->irq2
)
6412 irq_line
= host
->irq2
;
6414 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6417 /* print per-port info to dmesg */
6418 if (!ata_port_is_dummy(ap
))
6419 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
6420 "ctl 0x%p bmdma 0x%p irq %d\n",
6421 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6422 ata_mode_string(xfer_mask
),
6423 ap
->ioaddr
.cmd_addr
,
6424 ap
->ioaddr
.ctl_addr
,
6425 ap
->ioaddr
.bmdma_addr
,
6428 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6431 /* perform each probe synchronously */
6432 DPRINTK("probe begin\n");
6433 for (i
= 0; i
< host
->n_ports
; i
++) {
6434 struct ata_port
*ap
= host
->ports
[i
];
6438 if (ap
->ops
->error_handler
) {
6439 struct ata_eh_info
*ehi
= &ap
->eh_info
;
6440 unsigned long flags
;
6444 /* kick EH for boot probing */
6445 spin_lock_irqsave(ap
->lock
, flags
);
6447 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
6448 ehi
->action
|= ATA_EH_SOFTRESET
;
6449 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6451 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6452 ap
->pflags
|= ATA_PFLAG_LOADING
;
6453 ata_port_schedule_eh(ap
);
6455 spin_unlock_irqrestore(ap
->lock
, flags
);
6457 /* wait for EH to finish */
6458 ata_port_wait_eh(ap
);
6460 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6461 rc
= ata_bus_probe(ap
);
6462 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6465 /* FIXME: do something useful here?
6466 * Current libata behavior will
6467 * tear down everything when
6468 * the module is removed
6469 * or the h/w is unplugged.
6475 /* probes are done, now scan each port's disk(s) */
6476 DPRINTK("host probe begin\n");
6477 for (i
= 0; i
< host
->n_ports
; i
++) {
6478 struct ata_port
*ap
= host
->ports
[i
];
6480 ata_scsi_scan_host(ap
, 1);
6487 * ata_host_activate - start host, request IRQ and register it
6488 * @host: target ATA host
6489 * @irq: IRQ to request
6490 * @irq_handler: irq_handler used when requesting IRQ
6491 * @irq_flags: irq_flags used when requesting IRQ
6492 * @sht: scsi_host_template to use when registering the host
6494 * After allocating an ATA host and initializing it, most libata
6495 * LLDs perform three steps to activate the host - start host,
6496 * request IRQ and register it. This helper takes necessasry
6497 * arguments and performs the three steps in one go.
6500 * Inherited from calling layer (may sleep).
6503 * 0 on success, -errno otherwise.
6505 int ata_host_activate(struct ata_host
*host
, int irq
,
6506 irq_handler_t irq_handler
, unsigned long irq_flags
,
6507 struct scsi_host_template
*sht
)
6511 rc
= ata_host_start(host
);
6515 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6516 dev_driver_string(host
->dev
), host
);
6520 /* Used to print device info at probe */
6523 rc
= ata_host_register(host
, sht
);
6524 /* if failed, just free the IRQ and leave ports alone */
6526 devm_free_irq(host
->dev
, irq
, host
);
6532 * ata_port_detach - Detach ATA port in prepration of device removal
6533 * @ap: ATA port to be detached
6535 * Detach all ATA devices and the associated SCSI devices of @ap;
6536 * then, remove the associated SCSI host. @ap is guaranteed to
6537 * be quiescent on return from this function.
6540 * Kernel thread context (may sleep).
6542 void ata_port_detach(struct ata_port
*ap
)
6544 unsigned long flags
;
6547 if (!ap
->ops
->error_handler
)
6550 /* tell EH we're leaving & flush EH */
6551 spin_lock_irqsave(ap
->lock
, flags
);
6552 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6553 spin_unlock_irqrestore(ap
->lock
, flags
);
6555 ata_port_wait_eh(ap
);
6557 /* EH is now guaranteed to see UNLOADING, so no new device
6558 * will be attached. Disable all existing devices.
6560 spin_lock_irqsave(ap
->lock
, flags
);
6562 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
6563 ata_dev_disable(&ap
->device
[i
]);
6565 spin_unlock_irqrestore(ap
->lock
, flags
);
6567 /* Final freeze & EH. All in-flight commands are aborted. EH
6568 * will be skipped and retrials will be terminated with bad
6571 spin_lock_irqsave(ap
->lock
, flags
);
6572 ata_port_freeze(ap
); /* won't be thawed */
6573 spin_unlock_irqrestore(ap
->lock
, flags
);
6575 ata_port_wait_eh(ap
);
6576 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6579 /* remove the associated SCSI host */
6580 scsi_remove_host(ap
->scsi_host
);
6584 * ata_host_detach - Detach all ports of an ATA host
6585 * @host: Host to detach
6587 * Detach all ports of @host.
6590 * Kernel thread context (may sleep).
6592 void ata_host_detach(struct ata_host
*host
)
6596 for (i
= 0; i
< host
->n_ports
; i
++)
6597 ata_port_detach(host
->ports
[i
]);
6601 * ata_std_ports - initialize ioaddr with standard port offsets.
6602 * @ioaddr: IO address structure to be initialized
6604 * Utility function which initializes data_addr, error_addr,
6605 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6606 * device_addr, status_addr, and command_addr to standard offsets
6607 * relative to cmd_addr.
6609 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6612 void ata_std_ports(struct ata_ioports
*ioaddr
)
6614 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6615 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6616 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6617 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6618 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6619 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6620 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6621 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6622 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6623 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6630 * ata_pci_remove_one - PCI layer callback for device removal
6631 * @pdev: PCI device that was removed
6633 * PCI layer indicates to libata via this hook that hot-unplug or
6634 * module unload event has occurred. Detach all ports. Resource
6635 * release is handled via devres.
6638 * Inherited from PCI layer (may sleep).
6640 void ata_pci_remove_one(struct pci_dev
*pdev
)
6642 struct device
*dev
= pci_dev_to_dev(pdev
);
6643 struct ata_host
*host
= dev_get_drvdata(dev
);
6645 ata_host_detach(host
);
6648 /* move to PCI subsystem */
6649 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6651 unsigned long tmp
= 0;
6653 switch (bits
->width
) {
6656 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6662 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6668 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6679 return (tmp
== bits
->val
) ? 1 : 0;
6683 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6685 pci_save_state(pdev
);
6686 pci_disable_device(pdev
);
6688 if (mesg
.event
== PM_EVENT_SUSPEND
)
6689 pci_set_power_state(pdev
, PCI_D3hot
);
6692 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6696 pci_set_power_state(pdev
, PCI_D0
);
6697 pci_restore_state(pdev
);
6699 rc
= pcim_enable_device(pdev
);
6701 dev_printk(KERN_ERR
, &pdev
->dev
,
6702 "failed to enable device after resume (%d)\n", rc
);
6706 pci_set_master(pdev
);
6710 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6712 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6715 rc
= ata_host_suspend(host
, mesg
);
6719 ata_pci_device_do_suspend(pdev
, mesg
);
6724 int ata_pci_device_resume(struct pci_dev
*pdev
)
6726 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6729 rc
= ata_pci_device_do_resume(pdev
);
6731 ata_host_resume(host
);
6734 #endif /* CONFIG_PM */
6736 #endif /* CONFIG_PCI */
6739 static int __init
ata_init(void)
6741 ata_probe_timeout
*= HZ
;
6742 ata_wq
= create_workqueue("ata");
6746 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6748 destroy_workqueue(ata_wq
);
6752 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6756 static void __exit
ata_exit(void)
6758 destroy_workqueue(ata_wq
);
6759 destroy_workqueue(ata_aux_wq
);
6762 subsys_initcall(ata_init
);
6763 module_exit(ata_exit
);
6765 static unsigned long ratelimit_time
;
6766 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6768 int ata_ratelimit(void)
6771 unsigned long flags
;
6773 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6775 if (time_after(jiffies
, ratelimit_time
)) {
6777 ratelimit_time
= jiffies
+ (HZ
/5);
6781 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6787 * ata_wait_register - wait until register value changes
6788 * @reg: IO-mapped register
6789 * @mask: Mask to apply to read register value
6790 * @val: Wait condition
6791 * @interval_msec: polling interval in milliseconds
6792 * @timeout_msec: timeout in milliseconds
6794 * Waiting for some bits of register to change is a common
6795 * operation for ATA controllers. This function reads 32bit LE
6796 * IO-mapped register @reg and tests for the following condition.
6798 * (*@reg & mask) != val
6800 * If the condition is met, it returns; otherwise, the process is
6801 * repeated after @interval_msec until timeout.
6804 * Kernel thread context (may sleep)
6807 * The final register value.
6809 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6810 unsigned long interval_msec
,
6811 unsigned long timeout_msec
)
6813 unsigned long timeout
;
6816 tmp
= ioread32(reg
);
6818 /* Calculate timeout _after_ the first read to make sure
6819 * preceding writes reach the controller before starting to
6820 * eat away the timeout.
6822 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6824 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6825 msleep(interval_msec
);
6826 tmp
= ioread32(reg
);
6835 static void ata_dummy_noret(struct ata_port
*ap
) { }
6836 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6837 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6839 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6844 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6846 return AC_ERR_SYSTEM
;
6849 const struct ata_port_operations ata_dummy_port_ops
= {
6850 .port_disable
= ata_port_disable
,
6851 .check_status
= ata_dummy_check_status
,
6852 .check_altstatus
= ata_dummy_check_status
,
6853 .dev_select
= ata_noop_dev_select
,
6854 .qc_prep
= ata_noop_qc_prep
,
6855 .qc_issue
= ata_dummy_qc_issue
,
6856 .freeze
= ata_dummy_noret
,
6857 .thaw
= ata_dummy_noret
,
6858 .error_handler
= ata_dummy_noret
,
6859 .post_internal_cmd
= ata_dummy_qc_noret
,
6860 .irq_clear
= ata_dummy_noret
,
6861 .port_start
= ata_dummy_ret0
,
6862 .port_stop
= ata_dummy_noret
,
6865 const struct ata_port_info ata_dummy_port_info
= {
6866 .port_ops
= &ata_dummy_port_ops
,
6870 * libata is essentially a library of internal helper functions for
6871 * low-level ATA host controller drivers. As such, the API/ABI is
6872 * likely to change as new drivers are added and updated.
6873 * Do not depend on ABI/API stability.
6876 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6877 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6878 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6879 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6880 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6881 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6882 EXPORT_SYMBOL_GPL(ata_std_ports
);
6883 EXPORT_SYMBOL_GPL(ata_host_init
);
6884 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6885 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6886 EXPORT_SYMBOL_GPL(ata_host_start
);
6887 EXPORT_SYMBOL_GPL(ata_host_register
);
6888 EXPORT_SYMBOL_GPL(ata_host_activate
);
6889 EXPORT_SYMBOL_GPL(ata_host_detach
);
6890 EXPORT_SYMBOL_GPL(ata_sg_init
);
6891 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6892 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6893 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6894 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6895 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6896 EXPORT_SYMBOL_GPL(ata_tf_load
);
6897 EXPORT_SYMBOL_GPL(ata_tf_read
);
6898 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6899 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6900 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6901 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6902 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6903 EXPORT_SYMBOL_GPL(ata_check_status
);
6904 EXPORT_SYMBOL_GPL(ata_altstatus
);
6905 EXPORT_SYMBOL_GPL(ata_exec_command
);
6906 EXPORT_SYMBOL_GPL(ata_port_start
);
6907 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
6908 EXPORT_SYMBOL_GPL(ata_interrupt
);
6909 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6910 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6911 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6912 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6913 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
6914 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6915 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6916 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6917 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6918 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6919 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6920 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6921 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6922 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6923 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6924 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6925 EXPORT_SYMBOL_GPL(ata_port_probe
);
6926 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6927 EXPORT_SYMBOL_GPL(sata_set_spd
);
6928 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6929 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6930 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6931 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6932 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6933 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6934 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6935 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6936 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6937 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6938 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6939 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6940 EXPORT_SYMBOL_GPL(ata_port_disable
);
6941 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6942 EXPORT_SYMBOL_GPL(ata_wait_register
);
6943 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6944 EXPORT_SYMBOL_GPL(ata_wait_ready
);
6945 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6946 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6947 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6948 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6949 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6950 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6951 EXPORT_SYMBOL_GPL(ata_host_intr
);
6952 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6953 EXPORT_SYMBOL_GPL(sata_scr_read
);
6954 EXPORT_SYMBOL_GPL(sata_scr_write
);
6955 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6956 EXPORT_SYMBOL_GPL(ata_port_online
);
6957 EXPORT_SYMBOL_GPL(ata_port_offline
);
6959 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6960 EXPORT_SYMBOL_GPL(ata_host_resume
);
6961 #endif /* CONFIG_PM */
6962 EXPORT_SYMBOL_GPL(ata_id_string
);
6963 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6964 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
6965 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6967 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6968 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6969 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6972 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6973 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
6974 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
6975 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
6976 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6977 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6979 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6980 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6981 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6982 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6983 #endif /* CONFIG_PM */
6984 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6985 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6986 #endif /* CONFIG_PCI */
6988 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6989 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6990 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6991 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6992 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6993 EXPORT_SYMBOL_GPL(ata_port_abort
);
6994 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6995 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6996 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6997 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6998 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6999 EXPORT_SYMBOL_GPL(ata_do_eh
);
7000 EXPORT_SYMBOL_GPL(ata_irq_on
);
7001 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
7002 EXPORT_SYMBOL_GPL(ata_irq_ack
);
7003 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
7004 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7006 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7007 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7008 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7009 EXPORT_SYMBOL_GPL(ata_cable_sata
);