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 "2.20" /* must be exactly four chars */
65 /* debounce timing parameters in msecs { interval, duration, timeout } */
66 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
67 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
68 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
70 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
71 u16 heads
, u16 sectors
);
72 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
75 static unsigned int ata_print_id
= 1;
76 static struct workqueue_struct
*ata_wq
;
78 struct workqueue_struct
*ata_aux_wq
;
80 int atapi_enabled
= 1;
81 module_param(atapi_enabled
, int, 0444);
82 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
85 module_param(atapi_dmadir
, int, 0444);
86 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 module_param_named(fua
, libata_fua
, int, 0444);
90 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
92 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
93 module_param(ata_probe_timeout
, int, 0444);
94 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
96 int libata_noacpi
= 1;
97 module_param_named(noacpi
, libata_noacpi
, int, 0444);
98 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
100 MODULE_AUTHOR("Jeff Garzik");
101 MODULE_DESCRIPTION("Library module for ATA devices");
102 MODULE_LICENSE("GPL");
103 MODULE_VERSION(DRV_VERSION
);
107 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
108 * @tf: Taskfile to convert
109 * @fis: Buffer into which data will output
110 * @pmp: Port multiplier port
112 * Converts a standard ATA taskfile to a Serial ATA
113 * FIS structure (Register - Host to Device).
116 * Inherited from caller.
119 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
121 fis
[0] = 0x27; /* Register - Host to Device FIS */
122 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
123 bit 7 indicates Command FIS */
124 fis
[2] = tf
->command
;
125 fis
[3] = tf
->feature
;
132 fis
[8] = tf
->hob_lbal
;
133 fis
[9] = tf
->hob_lbam
;
134 fis
[10] = tf
->hob_lbah
;
135 fis
[11] = tf
->hob_feature
;
138 fis
[13] = tf
->hob_nsect
;
149 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
150 * @fis: Buffer from which data will be input
151 * @tf: Taskfile to output
153 * Converts a serial ATA FIS structure to a standard ATA taskfile.
156 * Inherited from caller.
159 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
161 tf
->command
= fis
[2]; /* status */
162 tf
->feature
= fis
[3]; /* error */
169 tf
->hob_lbal
= fis
[8];
170 tf
->hob_lbam
= fis
[9];
171 tf
->hob_lbah
= fis
[10];
174 tf
->hob_nsect
= fis
[13];
177 static const u8 ata_rw_cmds
[] = {
181 ATA_CMD_READ_MULTI_EXT
,
182 ATA_CMD_WRITE_MULTI_EXT
,
186 ATA_CMD_WRITE_MULTI_FUA_EXT
,
190 ATA_CMD_PIO_READ_EXT
,
191 ATA_CMD_PIO_WRITE_EXT
,
204 ATA_CMD_WRITE_FUA_EXT
208 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
209 * @tf: command to examine and configure
210 * @dev: device tf belongs to
212 * Examine the device configuration and tf->flags to calculate
213 * the proper read/write commands and protocol to use.
218 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
222 int index
, fua
, lba48
, write
;
224 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
225 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
226 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
228 if (dev
->flags
& ATA_DFLAG_PIO
) {
229 tf
->protocol
= ATA_PROT_PIO
;
230 index
= dev
->multi_count
? 0 : 8;
231 } else if (lba48
&& (dev
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
232 /* Unable to use DMA due to host limitation */
233 tf
->protocol
= ATA_PROT_PIO
;
234 index
= dev
->multi_count
? 0 : 8;
236 tf
->protocol
= ATA_PROT_DMA
;
240 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
249 * ata_tf_read_block - Read block address from ATA taskfile
250 * @tf: ATA taskfile of interest
251 * @dev: ATA device @tf belongs to
256 * Read block address from @tf. This function can handle all
257 * three address formats - LBA, LBA48 and CHS. tf->protocol and
258 * flags select the address format to use.
261 * Block address read from @tf.
263 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
267 if (tf
->flags
& ATA_TFLAG_LBA
) {
268 if (tf
->flags
& ATA_TFLAG_LBA48
) {
269 block
|= (u64
)tf
->hob_lbah
<< 40;
270 block
|= (u64
)tf
->hob_lbam
<< 32;
271 block
|= tf
->hob_lbal
<< 24;
273 block
|= (tf
->device
& 0xf) << 24;
275 block
|= tf
->lbah
<< 16;
276 block
|= tf
->lbam
<< 8;
281 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
282 head
= tf
->device
& 0xf;
285 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
292 * ata_build_rw_tf - Build ATA taskfile for given read/write request
293 * @tf: Target ATA taskfile
294 * @dev: ATA device @tf belongs to
295 * @block: Block address
296 * @n_block: Number of blocks
297 * @tf_flags: RW/FUA etc...
303 * Build ATA taskfile @tf for read/write request described by
304 * @block, @n_block, @tf_flags and @tag on @dev.
308 * 0 on success, -ERANGE if the request is too large for @dev,
309 * -EINVAL if the request is invalid.
311 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
312 u64 block
, u32 n_block
, unsigned int tf_flags
,
315 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
316 tf
->flags
|= tf_flags
;
318 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
320 if (!lba_48_ok(block
, n_block
))
323 tf
->protocol
= ATA_PROT_NCQ
;
324 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
326 if (tf
->flags
& ATA_TFLAG_WRITE
)
327 tf
->command
= ATA_CMD_FPDMA_WRITE
;
329 tf
->command
= ATA_CMD_FPDMA_READ
;
331 tf
->nsect
= tag
<< 3;
332 tf
->hob_feature
= (n_block
>> 8) & 0xff;
333 tf
->feature
= n_block
& 0xff;
335 tf
->hob_lbah
= (block
>> 40) & 0xff;
336 tf
->hob_lbam
= (block
>> 32) & 0xff;
337 tf
->hob_lbal
= (block
>> 24) & 0xff;
338 tf
->lbah
= (block
>> 16) & 0xff;
339 tf
->lbam
= (block
>> 8) & 0xff;
340 tf
->lbal
= block
& 0xff;
343 if (tf
->flags
& ATA_TFLAG_FUA
)
344 tf
->device
|= 1 << 7;
345 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
346 tf
->flags
|= ATA_TFLAG_LBA
;
348 if (lba_28_ok(block
, n_block
)) {
350 tf
->device
|= (block
>> 24) & 0xf;
351 } else if (lba_48_ok(block
, n_block
)) {
352 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
356 tf
->flags
|= ATA_TFLAG_LBA48
;
358 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
360 tf
->hob_lbah
= (block
>> 40) & 0xff;
361 tf
->hob_lbam
= (block
>> 32) & 0xff;
362 tf
->hob_lbal
= (block
>> 24) & 0xff;
364 /* request too large even for LBA48 */
367 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
370 tf
->nsect
= n_block
& 0xff;
372 tf
->lbah
= (block
>> 16) & 0xff;
373 tf
->lbam
= (block
>> 8) & 0xff;
374 tf
->lbal
= block
& 0xff;
376 tf
->device
|= ATA_LBA
;
379 u32 sect
, head
, cyl
, track
;
381 /* The request -may- be too large for CHS addressing. */
382 if (!lba_28_ok(block
, n_block
))
385 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
388 /* Convert LBA to CHS */
389 track
= (u32
)block
/ dev
->sectors
;
390 cyl
= track
/ dev
->heads
;
391 head
= track
% dev
->heads
;
392 sect
= (u32
)block
% dev
->sectors
+ 1;
394 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
395 (u32
)block
, track
, cyl
, head
, sect
);
397 /* Check whether the converted CHS can fit.
401 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
404 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
415 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
416 * @pio_mask: pio_mask
417 * @mwdma_mask: mwdma_mask
418 * @udma_mask: udma_mask
420 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
421 * unsigned int xfer_mask.
429 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
430 unsigned int mwdma_mask
,
431 unsigned int udma_mask
)
433 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
434 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
435 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
439 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
440 * @xfer_mask: xfer_mask to unpack
441 * @pio_mask: resulting pio_mask
442 * @mwdma_mask: resulting mwdma_mask
443 * @udma_mask: resulting udma_mask
445 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
446 * Any NULL distination masks will be ignored.
448 static void ata_unpack_xfermask(unsigned int xfer_mask
,
449 unsigned int *pio_mask
,
450 unsigned int *mwdma_mask
,
451 unsigned int *udma_mask
)
454 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
456 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
458 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
461 static const struct ata_xfer_ent
{
465 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
466 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
467 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
472 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
473 * @xfer_mask: xfer_mask of interest
475 * Return matching XFER_* value for @xfer_mask. Only the highest
476 * bit of @xfer_mask is considered.
482 * Matching XFER_* value, 0 if no match found.
484 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
486 int highbit
= fls(xfer_mask
) - 1;
487 const struct ata_xfer_ent
*ent
;
489 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
490 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
491 return ent
->base
+ highbit
- ent
->shift
;
496 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
497 * @xfer_mode: XFER_* of interest
499 * Return matching xfer_mask for @xfer_mode.
505 * Matching xfer_mask, 0 if no match found.
507 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
509 const struct ata_xfer_ent
*ent
;
511 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
512 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
513 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
518 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
519 * @xfer_mode: XFER_* of interest
521 * Return matching xfer_shift for @xfer_mode.
527 * Matching xfer_shift, -1 if no match found.
529 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
531 const struct ata_xfer_ent
*ent
;
533 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
534 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
540 * ata_mode_string - convert xfer_mask to string
541 * @xfer_mask: mask of bits supported; only highest bit counts.
543 * Determine string which represents the highest speed
544 * (highest bit in @modemask).
550 * Constant C string representing highest speed listed in
551 * @mode_mask, or the constant C string "<n/a>".
553 static const char *ata_mode_string(unsigned int xfer_mask
)
555 static const char * const xfer_mode_str
[] = {
579 highbit
= fls(xfer_mask
) - 1;
580 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
581 return xfer_mode_str
[highbit
];
585 static const char *sata_spd_string(unsigned int spd
)
587 static const char * const spd_str
[] = {
592 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
594 return spd_str
[spd
- 1];
597 void ata_dev_disable(struct ata_device
*dev
)
599 if (ata_dev_enabled(dev
) && ata_msg_drv(dev
->ap
)) {
600 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
601 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
608 * ata_devchk - PATA device presence detection
609 * @ap: ATA channel to examine
610 * @device: Device to examine (starting at zero)
612 * This technique was originally described in
613 * Hale Landis's ATADRVR (www.ata-atapi.com), and
614 * later found its way into the ATA/ATAPI spec.
616 * Write a pattern to the ATA shadow registers,
617 * and if a device is present, it will respond by
618 * correctly storing and echoing back the
619 * ATA shadow register contents.
625 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
627 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
630 ap
->ops
->dev_select(ap
, device
);
632 iowrite8(0x55, ioaddr
->nsect_addr
);
633 iowrite8(0xaa, ioaddr
->lbal_addr
);
635 iowrite8(0xaa, ioaddr
->nsect_addr
);
636 iowrite8(0x55, ioaddr
->lbal_addr
);
638 iowrite8(0x55, ioaddr
->nsect_addr
);
639 iowrite8(0xaa, ioaddr
->lbal_addr
);
641 nsect
= ioread8(ioaddr
->nsect_addr
);
642 lbal
= ioread8(ioaddr
->lbal_addr
);
644 if ((nsect
== 0x55) && (lbal
== 0xaa))
645 return 1; /* we found a device */
647 return 0; /* nothing found */
651 * ata_dev_classify - determine device type based on ATA-spec signature
652 * @tf: ATA taskfile register set for device to be identified
654 * Determine from taskfile register contents whether a device is
655 * ATA or ATAPI, as per "Signature and persistence" section
656 * of ATA/PI spec (volume 1, sect 5.14).
662 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
663 * the event of failure.
666 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
668 /* Apple's open source Darwin code hints that some devices only
669 * put a proper signature into the LBA mid/high registers,
670 * So, we only check those. It's sufficient for uniqueness.
673 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
674 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
675 DPRINTK("found ATA device by sig\n");
679 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
680 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
681 DPRINTK("found ATAPI device by sig\n");
682 return ATA_DEV_ATAPI
;
685 DPRINTK("unknown device\n");
686 return ATA_DEV_UNKNOWN
;
690 * ata_dev_try_classify - Parse returned ATA device signature
691 * @ap: ATA channel to examine
692 * @device: Device to examine (starting at zero)
693 * @r_err: Value of error register on completion
695 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
696 * an ATA/ATAPI-defined set of values is placed in the ATA
697 * shadow registers, indicating the results of device detection
700 * Select the ATA device, and read the values from the ATA shadow
701 * registers. Then parse according to the Error register value,
702 * and the spec-defined values examined by ata_dev_classify().
708 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
712 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
714 struct ata_taskfile tf
;
718 ap
->ops
->dev_select(ap
, device
);
720 memset(&tf
, 0, sizeof(tf
));
722 ap
->ops
->tf_read(ap
, &tf
);
727 /* see if device passed diags: if master then continue and warn later */
728 if (err
== 0 && device
== 0)
729 /* diagnostic fail : do nothing _YET_ */
730 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
733 else if ((device
== 0) && (err
== 0x81))
738 /* determine if device is ATA or ATAPI */
739 class = ata_dev_classify(&tf
);
741 if (class == ATA_DEV_UNKNOWN
)
743 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
749 * ata_id_string - Convert IDENTIFY DEVICE page into string
750 * @id: IDENTIFY DEVICE results we will examine
751 * @s: string into which data is output
752 * @ofs: offset into identify device page
753 * @len: length of string to return. must be an even number.
755 * The strings in the IDENTIFY DEVICE page are broken up into
756 * 16-bit chunks. Run through the string, and output each
757 * 8-bit chunk linearly, regardless of platform.
763 void ata_id_string(const u16
*id
, unsigned char *s
,
764 unsigned int ofs
, unsigned int len
)
783 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
784 * @id: IDENTIFY DEVICE results we will examine
785 * @s: string into which data is output
786 * @ofs: offset into identify device page
787 * @len: length of string to return. must be an odd number.
789 * This function is identical to ata_id_string except that it
790 * trims trailing spaces and terminates the resulting string with
791 * null. @len must be actual maximum length (even number) + 1.
796 void ata_id_c_string(const u16
*id
, unsigned char *s
,
797 unsigned int ofs
, unsigned int len
)
803 ata_id_string(id
, s
, ofs
, len
- 1);
805 p
= s
+ strnlen(s
, len
- 1);
806 while (p
> s
&& p
[-1] == ' ')
811 static u64
ata_id_n_sectors(const u16
*id
)
813 if (ata_id_has_lba(id
)) {
814 if (ata_id_has_lba48(id
))
815 return ata_id_u64(id
, 100);
817 return ata_id_u32(id
, 60);
819 if (ata_id_current_chs_valid(id
))
820 return ata_id_u32(id
, 57);
822 return id
[1] * id
[3] * id
[6];
827 * ata_id_to_dma_mode - Identify DMA mode from id block
828 * @dev: device to identify
829 * @unknown: mode to assume if we cannot tell
831 * Set up the timing values for the device based upon the identify
832 * reported values for the DMA mode. This function is used by drivers
833 * which rely upon firmware configured modes, but wish to report the
834 * mode correctly when possible.
836 * In addition we emit similarly formatted messages to the default
837 * ata_dev_set_mode handler, in order to provide consistency of
841 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
846 /* Pack the DMA modes */
847 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
848 if (dev
->id
[53] & 0x04)
849 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
851 /* Select the mode in use */
852 mode
= ata_xfer_mask2mode(mask
);
855 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
856 ata_mode_string(mask
));
858 /* SWDMA perhaps ? */
860 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
863 /* Configure the device reporting */
864 dev
->xfer_mode
= mode
;
865 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
869 * ata_noop_dev_select - Select device 0/1 on ATA bus
870 * @ap: ATA channel to manipulate
871 * @device: ATA device (numbered from zero) to select
873 * This function performs no actual function.
875 * May be used as the dev_select() entry in ata_port_operations.
880 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
886 * ata_std_dev_select - Select device 0/1 on ATA bus
887 * @ap: ATA channel to manipulate
888 * @device: ATA device (numbered from zero) to select
890 * Use the method defined in the ATA specification to
891 * make either device 0, or device 1, active on the
892 * ATA channel. Works with both PIO and MMIO.
894 * May be used as the dev_select() entry in ata_port_operations.
900 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
905 tmp
= ATA_DEVICE_OBS
;
907 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
909 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
910 ata_pause(ap
); /* needed; also flushes, for mmio */
914 * ata_dev_select - Select device 0/1 on ATA bus
915 * @ap: ATA channel to manipulate
916 * @device: ATA device (numbered from zero) to select
917 * @wait: non-zero to wait for Status register BSY bit to clear
918 * @can_sleep: non-zero if context allows sleeping
920 * Use the method defined in the ATA specification to
921 * make either device 0, or device 1, active on the
924 * This is a high-level version of ata_std_dev_select(),
925 * which additionally provides the services of inserting
926 * the proper pauses and status polling, where needed.
932 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
933 unsigned int wait
, unsigned int can_sleep
)
935 if (ata_msg_probe(ap
))
936 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
937 "device %u, wait %u\n", device
, wait
);
942 ap
->ops
->dev_select(ap
, device
);
945 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
952 * ata_dump_id - IDENTIFY DEVICE info debugging output
953 * @id: IDENTIFY DEVICE page to dump
955 * Dump selected 16-bit words from the given IDENTIFY DEVICE
962 static inline void ata_dump_id(const u16
*id
)
964 DPRINTK("49==0x%04x "
974 DPRINTK("80==0x%04x "
984 DPRINTK("88==0x%04x "
991 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
992 * @id: IDENTIFY data to compute xfer mask from
994 * Compute the xfermask for this device. This is not as trivial
995 * as it seems if we must consider early devices correctly.
997 * FIXME: pre IDE drive timing (do we care ?).
1005 static unsigned int ata_id_xfermask(const u16
*id
)
1007 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1009 /* Usual case. Word 53 indicates word 64 is valid */
1010 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1011 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1015 /* If word 64 isn't valid then Word 51 high byte holds
1016 * the PIO timing number for the maximum. Turn it into
1019 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1020 if (mode
< 5) /* Valid PIO range */
1021 pio_mask
= (2 << mode
) - 1;
1025 /* But wait.. there's more. Design your standards by
1026 * committee and you too can get a free iordy field to
1027 * process. However its the speeds not the modes that
1028 * are supported... Note drivers using the timing API
1029 * will get this right anyway
1033 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1035 if (ata_id_is_cfa(id
)) {
1037 * Process compact flash extended modes
1039 int pio
= id
[163] & 0x7;
1040 int dma
= (id
[163] >> 3) & 7;
1043 pio_mask
|= (1 << 5);
1045 pio_mask
|= (1 << 6);
1047 mwdma_mask
|= (1 << 3);
1049 mwdma_mask
|= (1 << 4);
1053 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1054 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1056 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1060 * ata_port_queue_task - Queue port_task
1061 * @ap: The ata_port to queue port_task for
1062 * @fn: workqueue function to be scheduled
1063 * @data: data for @fn to use
1064 * @delay: delay time for workqueue function
1066 * Schedule @fn(@data) for execution after @delay jiffies using
1067 * port_task. There is one port_task per port and it's the
1068 * user(low level driver)'s responsibility to make sure that only
1069 * one task is active at any given time.
1071 * libata core layer takes care of synchronization between
1072 * port_task and EH. ata_port_queue_task() may be ignored for EH
1076 * Inherited from caller.
1078 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1079 unsigned long delay
)
1083 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
1086 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1087 ap
->port_task_data
= data
;
1089 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1091 /* rc == 0 means that another user is using port task */
1096 * ata_port_flush_task - Flush port_task
1097 * @ap: The ata_port to flush port_task for
1099 * After this function completes, port_task is guranteed not to
1100 * be running or scheduled.
1103 * Kernel thread context (may sleep)
1105 void ata_port_flush_task(struct ata_port
*ap
)
1107 unsigned long flags
;
1111 spin_lock_irqsave(ap
->lock
, flags
);
1112 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1113 spin_unlock_irqrestore(ap
->lock
, flags
);
1115 DPRINTK("flush #1\n");
1116 flush_workqueue(ata_wq
);
1119 * At this point, if a task is running, it's guaranteed to see
1120 * the FLUSH flag; thus, it will never queue pio tasks again.
1123 if (!cancel_delayed_work(&ap
->port_task
)) {
1124 if (ata_msg_ctl(ap
))
1125 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1127 flush_workqueue(ata_wq
);
1130 spin_lock_irqsave(ap
->lock
, flags
);
1131 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1132 spin_unlock_irqrestore(ap
->lock
, flags
);
1134 if (ata_msg_ctl(ap
))
1135 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1138 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1140 struct completion
*waiting
= qc
->private_data
;
1146 * ata_exec_internal_sg - execute libata internal command
1147 * @dev: Device to which the command is sent
1148 * @tf: Taskfile registers for the command and the result
1149 * @cdb: CDB for packet command
1150 * @dma_dir: Data tranfer direction of the command
1151 * @sg: sg list for the data buffer of the command
1152 * @n_elem: Number of sg entries
1154 * Executes libata internal command with timeout. @tf contains
1155 * command on entry and result on return. Timeout and error
1156 * conditions are reported via return value. No recovery action
1157 * is taken after a command times out. It's caller's duty to
1158 * clean up after timeout.
1161 * None. Should be called with kernel context, might sleep.
1164 * Zero on success, AC_ERR_* mask on failure
1166 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1167 struct ata_taskfile
*tf
, const u8
*cdb
,
1168 int dma_dir
, struct scatterlist
*sg
,
1169 unsigned int n_elem
)
1171 struct ata_port
*ap
= dev
->ap
;
1172 u8 command
= tf
->command
;
1173 struct ata_queued_cmd
*qc
;
1174 unsigned int tag
, preempted_tag
;
1175 u32 preempted_sactive
, preempted_qc_active
;
1176 DECLARE_COMPLETION_ONSTACK(wait
);
1177 unsigned long flags
;
1178 unsigned int err_mask
;
1181 spin_lock_irqsave(ap
->lock
, flags
);
1183 /* no internal command while frozen */
1184 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1185 spin_unlock_irqrestore(ap
->lock
, flags
);
1186 return AC_ERR_SYSTEM
;
1189 /* initialize internal qc */
1191 /* XXX: Tag 0 is used for drivers with legacy EH as some
1192 * drivers choke if any other tag is given. This breaks
1193 * ata_tag_internal() test for those drivers. Don't use new
1194 * EH stuff without converting to it.
1196 if (ap
->ops
->error_handler
)
1197 tag
= ATA_TAG_INTERNAL
;
1201 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1203 qc
= __ata_qc_from_tag(ap
, tag
);
1211 preempted_tag
= ap
->active_tag
;
1212 preempted_sactive
= ap
->sactive
;
1213 preempted_qc_active
= ap
->qc_active
;
1214 ap
->active_tag
= ATA_TAG_POISON
;
1218 /* prepare & issue qc */
1221 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1222 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1223 qc
->dma_dir
= dma_dir
;
1224 if (dma_dir
!= DMA_NONE
) {
1225 unsigned int i
, buflen
= 0;
1227 for (i
= 0; i
< n_elem
; i
++)
1228 buflen
+= sg
[i
].length
;
1230 ata_sg_init(qc
, sg
, n_elem
);
1231 qc
->nbytes
= buflen
;
1234 qc
->private_data
= &wait
;
1235 qc
->complete_fn
= ata_qc_complete_internal
;
1239 spin_unlock_irqrestore(ap
->lock
, flags
);
1241 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1243 ata_port_flush_task(ap
);
1246 spin_lock_irqsave(ap
->lock
, flags
);
1248 /* We're racing with irq here. If we lose, the
1249 * following test prevents us from completing the qc
1250 * twice. If we win, the port is frozen and will be
1251 * cleaned up by ->post_internal_cmd().
1253 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1254 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1256 if (ap
->ops
->error_handler
)
1257 ata_port_freeze(ap
);
1259 ata_qc_complete(qc
);
1261 if (ata_msg_warn(ap
))
1262 ata_dev_printk(dev
, KERN_WARNING
,
1263 "qc timeout (cmd 0x%x)\n", command
);
1266 spin_unlock_irqrestore(ap
->lock
, flags
);
1269 /* do post_internal_cmd */
1270 if (ap
->ops
->post_internal_cmd
)
1271 ap
->ops
->post_internal_cmd(qc
);
1273 if ((qc
->flags
& ATA_QCFLAG_FAILED
) && !qc
->err_mask
) {
1274 if (ata_msg_warn(ap
))
1275 ata_dev_printk(dev
, KERN_WARNING
,
1276 "zero err_mask for failed "
1277 "internal command, assuming AC_ERR_OTHER\n");
1278 qc
->err_mask
|= AC_ERR_OTHER
;
1282 spin_lock_irqsave(ap
->lock
, flags
);
1284 *tf
= qc
->result_tf
;
1285 err_mask
= qc
->err_mask
;
1288 ap
->active_tag
= preempted_tag
;
1289 ap
->sactive
= preempted_sactive
;
1290 ap
->qc_active
= preempted_qc_active
;
1292 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1293 * Until those drivers are fixed, we detect the condition
1294 * here, fail the command with AC_ERR_SYSTEM and reenable the
1297 * Note that this doesn't change any behavior as internal
1298 * command failure results in disabling the device in the
1299 * higher layer for LLDDs without new reset/EH callbacks.
1301 * Kill the following code as soon as those drivers are fixed.
1303 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1304 err_mask
|= AC_ERR_SYSTEM
;
1308 spin_unlock_irqrestore(ap
->lock
, flags
);
1314 * ata_exec_internal - execute libata internal command
1315 * @dev: Device to which the command is sent
1316 * @tf: Taskfile registers for the command and the result
1317 * @cdb: CDB for packet command
1318 * @dma_dir: Data tranfer direction of the command
1319 * @buf: Data buffer of the command
1320 * @buflen: Length of data buffer
1322 * Wrapper around ata_exec_internal_sg() which takes simple
1323 * buffer instead of sg list.
1326 * None. Should be called with kernel context, might sleep.
1329 * Zero on success, AC_ERR_* mask on failure
1331 unsigned ata_exec_internal(struct ata_device
*dev
,
1332 struct ata_taskfile
*tf
, const u8
*cdb
,
1333 int dma_dir
, void *buf
, unsigned int buflen
)
1335 struct scatterlist
*psg
= NULL
, sg
;
1336 unsigned int n_elem
= 0;
1338 if (dma_dir
!= DMA_NONE
) {
1340 sg_init_one(&sg
, buf
, buflen
);
1345 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1349 * ata_do_simple_cmd - execute simple internal command
1350 * @dev: Device to which the command is sent
1351 * @cmd: Opcode to execute
1353 * Execute a 'simple' command, that only consists of the opcode
1354 * 'cmd' itself, without filling any other registers
1357 * Kernel thread context (may sleep).
1360 * Zero on success, AC_ERR_* mask on failure
1362 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1364 struct ata_taskfile tf
;
1366 ata_tf_init(dev
, &tf
);
1369 tf
.flags
|= ATA_TFLAG_DEVICE
;
1370 tf
.protocol
= ATA_PROT_NODATA
;
1372 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1376 * ata_pio_need_iordy - check if iordy needed
1379 * Check if the current speed of the device requires IORDY. Used
1380 * by various controllers for chip configuration.
1383 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1386 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1393 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1395 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1396 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1397 /* Is the speed faster than the drive allows non IORDY ? */
1399 /* This is cycle times not frequency - watch the logic! */
1400 if (pio
> 240) /* PIO2 is 240nS per cycle */
1409 * ata_dev_read_id - Read ID data from the specified device
1410 * @dev: target device
1411 * @p_class: pointer to class of the target device (may be changed)
1412 * @flags: ATA_READID_* flags
1413 * @id: buffer to read IDENTIFY data into
1415 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1416 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1417 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1418 * for pre-ATA4 drives.
1421 * Kernel thread context (may sleep)
1424 * 0 on success, -errno otherwise.
1426 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1427 unsigned int flags
, u16
*id
)
1429 struct ata_port
*ap
= dev
->ap
;
1430 unsigned int class = *p_class
;
1431 struct ata_taskfile tf
;
1432 unsigned int err_mask
= 0;
1436 if (ata_msg_ctl(ap
))
1437 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1439 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1442 ata_tf_init(dev
, &tf
);
1446 tf
.command
= ATA_CMD_ID_ATA
;
1449 tf
.command
= ATA_CMD_ID_ATAPI
;
1453 reason
= "unsupported class";
1457 tf
.protocol
= ATA_PROT_PIO
;
1459 /* Some devices choke if TF registers contain garbage. Make
1460 * sure those are properly initialized.
1462 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1464 /* Device presence detection is unreliable on some
1465 * controllers. Always poll IDENTIFY if available.
1467 tf
.flags
|= ATA_TFLAG_POLLING
;
1469 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1470 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1472 if (err_mask
& AC_ERR_NODEV_HINT
) {
1473 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1474 ap
->print_id
, dev
->devno
);
1479 reason
= "I/O error";
1483 swap_buf_le16(id
, ATA_ID_WORDS
);
1487 reason
= "device reports illegal type";
1489 if (class == ATA_DEV_ATA
) {
1490 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1493 if (ata_id_is_ata(id
))
1497 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1499 * The exact sequence expected by certain pre-ATA4 drives is:
1502 * INITIALIZE DEVICE PARAMETERS
1504 * Some drives were very specific about that exact sequence.
1506 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1507 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1510 reason
= "INIT_DEV_PARAMS failed";
1514 /* current CHS translation info (id[53-58]) might be
1515 * changed. reread the identify device info.
1517 flags
&= ~ATA_READID_POSTRESET
;
1527 if (ata_msg_warn(ap
))
1528 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1529 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1533 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1535 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1538 static void ata_dev_config_ncq(struct ata_device
*dev
,
1539 char *desc
, size_t desc_sz
)
1541 struct ata_port
*ap
= dev
->ap
;
1542 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1544 if (!ata_id_has_ncq(dev
->id
)) {
1548 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1549 snprintf(desc
, desc_sz
, "NCQ (not used)");
1552 if (ap
->flags
& ATA_FLAG_NCQ
) {
1553 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1554 dev
->flags
|= ATA_DFLAG_NCQ
;
1557 if (hdepth
>= ddepth
)
1558 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1560 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1564 * ata_dev_configure - Configure the specified ATA/ATAPI device
1565 * @dev: Target device to configure
1567 * Configure @dev according to @dev->id. Generic and low-level
1568 * driver specific fixups are also applied.
1571 * Kernel thread context (may sleep)
1574 * 0 on success, -errno otherwise
1576 int ata_dev_configure(struct ata_device
*dev
)
1578 struct ata_port
*ap
= dev
->ap
;
1579 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1580 const u16
*id
= dev
->id
;
1581 unsigned int xfer_mask
;
1582 char revbuf
[7]; /* XYZ-99\0 */
1583 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1584 char modelbuf
[ATA_ID_PROD_LEN
+1];
1587 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1588 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1593 if (ata_msg_probe(ap
))
1594 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1597 rc
= ata_acpi_push_id(ap
, dev
->devno
);
1599 ata_dev_printk(dev
, KERN_WARNING
, "failed to set _SDD(%d)\n",
1603 /* retrieve and execute the ATA task file of _GTF */
1604 ata_acpi_exec_tfs(ap
);
1606 /* print device capabilities */
1607 if (ata_msg_probe(ap
))
1608 ata_dev_printk(dev
, KERN_DEBUG
,
1609 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1610 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1612 id
[49], id
[82], id
[83], id
[84],
1613 id
[85], id
[86], id
[87], id
[88]);
1615 /* initialize to-be-configured parameters */
1616 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1617 dev
->max_sectors
= 0;
1625 * common ATA, ATAPI feature tests
1628 /* find max transfer mode; for printk only */
1629 xfer_mask
= ata_id_xfermask(id
);
1631 if (ata_msg_probe(ap
))
1634 /* ATA-specific feature tests */
1635 if (dev
->class == ATA_DEV_ATA
) {
1636 if (ata_id_is_cfa(id
)) {
1637 if (id
[162] & 1) /* CPRM may make this media unusable */
1638 ata_dev_printk(dev
, KERN_WARNING
,
1639 "supports DRM functions and may "
1640 "not be fully accessable.\n");
1641 snprintf(revbuf
, 7, "CFA");
1644 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1646 dev
->n_sectors
= ata_id_n_sectors(id
);
1648 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1649 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1652 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1655 if (dev
->id
[59] & 0x100)
1656 dev
->multi_count
= dev
->id
[59] & 0xff;
1658 if (ata_id_has_lba(id
)) {
1659 const char *lba_desc
;
1663 dev
->flags
|= ATA_DFLAG_LBA
;
1664 if (ata_id_has_lba48(id
)) {
1665 dev
->flags
|= ATA_DFLAG_LBA48
;
1668 if (dev
->n_sectors
>= (1UL << 28) &&
1669 ata_id_has_flush_ext(id
))
1670 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1674 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1676 /* print device info to dmesg */
1677 if (ata_msg_drv(ap
) && print_info
) {
1678 ata_dev_printk(dev
, KERN_INFO
,
1679 "%s: %s, %s, max %s\n",
1680 revbuf
, modelbuf
, fwrevbuf
,
1681 ata_mode_string(xfer_mask
));
1682 ata_dev_printk(dev
, KERN_INFO
,
1683 "%Lu sectors, multi %u: %s %s\n",
1684 (unsigned long long)dev
->n_sectors
,
1685 dev
->multi_count
, lba_desc
, ncq_desc
);
1690 /* Default translation */
1691 dev
->cylinders
= id
[1];
1693 dev
->sectors
= id
[6];
1695 if (ata_id_current_chs_valid(id
)) {
1696 /* Current CHS translation is valid. */
1697 dev
->cylinders
= id
[54];
1698 dev
->heads
= id
[55];
1699 dev
->sectors
= id
[56];
1702 /* print device info to dmesg */
1703 if (ata_msg_drv(ap
) && print_info
) {
1704 ata_dev_printk(dev
, KERN_INFO
,
1705 "%s: %s, %s, max %s\n",
1706 revbuf
, modelbuf
, fwrevbuf
,
1707 ata_mode_string(xfer_mask
));
1708 ata_dev_printk(dev
, KERN_INFO
,
1709 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1710 (unsigned long long)dev
->n_sectors
,
1711 dev
->multi_count
, dev
->cylinders
,
1712 dev
->heads
, dev
->sectors
);
1719 /* ATAPI-specific feature tests */
1720 else if (dev
->class == ATA_DEV_ATAPI
) {
1721 char *cdb_intr_string
= "";
1723 rc
= atapi_cdb_len(id
);
1724 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1725 if (ata_msg_warn(ap
))
1726 ata_dev_printk(dev
, KERN_WARNING
,
1727 "unsupported CDB len\n");
1731 dev
->cdb_len
= (unsigned int) rc
;
1733 if (ata_id_cdb_intr(dev
->id
)) {
1734 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1735 cdb_intr_string
= ", CDB intr";
1738 /* print device info to dmesg */
1739 if (ata_msg_drv(ap
) && print_info
)
1740 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1741 ata_mode_string(xfer_mask
),
1745 /* determine max_sectors */
1746 dev
->max_sectors
= ATA_MAX_SECTORS
;
1747 if (dev
->flags
& ATA_DFLAG_LBA48
)
1748 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1750 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1751 /* Let the user know. We don't want to disallow opens for
1752 rescue purposes, or in case the vendor is just a blithering
1755 ata_dev_printk(dev
, KERN_WARNING
,
1756 "Drive reports diagnostics failure. This may indicate a drive\n");
1757 ata_dev_printk(dev
, KERN_WARNING
,
1758 "fault or invalid emulation. Contact drive vendor for information.\n");
1762 /* limit bridge transfers to udma5, 200 sectors */
1763 if (ata_dev_knobble(dev
)) {
1764 if (ata_msg_drv(ap
) && print_info
)
1765 ata_dev_printk(dev
, KERN_INFO
,
1766 "applying bridge limits\n");
1767 dev
->udma_mask
&= ATA_UDMA5
;
1768 dev
->max_sectors
= ATA_MAX_SECTORS
;
1771 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_MAX_SEC_128
)
1772 dev
->max_sectors
= min(ATA_MAX_SECTORS_128
, dev
->max_sectors
);
1774 /* limit ATAPI DMA to R/W commands only */
1775 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_DMA_RW_ONLY
)
1776 dev
->horkage
|= ATA_HORKAGE_DMA_RW_ONLY
;
1778 if (ap
->ops
->dev_config
)
1779 ap
->ops
->dev_config(dev
);
1781 if (ata_msg_probe(ap
))
1782 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
1783 __FUNCTION__
, ata_chk_status(ap
));
1787 if (ata_msg_probe(ap
))
1788 ata_dev_printk(dev
, KERN_DEBUG
,
1789 "%s: EXIT, err\n", __FUNCTION__
);
1794 * ata_bus_probe - Reset and probe ATA bus
1797 * Master ATA bus probing function. Initiates a hardware-dependent
1798 * bus reset, then attempts to identify any devices found on
1802 * PCI/etc. bus probe sem.
1805 * Zero on success, negative errno otherwise.
1808 int ata_bus_probe(struct ata_port
*ap
)
1810 unsigned int classes
[ATA_MAX_DEVICES
];
1811 int tries
[ATA_MAX_DEVICES
];
1813 struct ata_device
*dev
;
1817 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1818 tries
[i
] = ATA_PROBE_MAX_TRIES
;
1821 /* reset and determine device classes */
1822 ap
->ops
->phy_reset(ap
);
1824 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1825 dev
= &ap
->device
[i
];
1827 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
1828 dev
->class != ATA_DEV_UNKNOWN
)
1829 classes
[dev
->devno
] = dev
->class;
1831 classes
[dev
->devno
] = ATA_DEV_NONE
;
1833 dev
->class = ATA_DEV_UNKNOWN
;
1838 /* after the reset the device state is PIO 0 and the controller
1839 state is undefined. Record the mode */
1841 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1842 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
1844 /* read IDENTIFY page and configure devices. We have to do the identify
1845 specific sequence bass-ackwards so that PDIAG- is released by
1848 for (i
= ATA_MAX_DEVICES
- 1; i
>= 0; i
--) {
1849 dev
= &ap
->device
[i
];
1852 dev
->class = classes
[i
];
1854 if (!ata_dev_enabled(dev
))
1857 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
1863 /* After the identify sequence we can now set up the devices. We do
1864 this in the normal order so that the user doesn't get confused */
1866 for(i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1867 dev
= &ap
->device
[i
];
1868 if (!ata_dev_enabled(dev
))
1871 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
1872 rc
= ata_dev_configure(dev
);
1873 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
1878 /* configure transfer mode */
1879 rc
= ata_set_mode(ap
, &dev
);
1883 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1884 if (ata_dev_enabled(&ap
->device
[i
]))
1887 /* no device present, disable port */
1888 ata_port_disable(ap
);
1889 ap
->ops
->port_disable(ap
);
1893 tries
[dev
->devno
]--;
1897 /* eeek, something went very wrong, give up */
1898 tries
[dev
->devno
] = 0;
1902 /* give it just one more chance */
1903 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
1905 if (tries
[dev
->devno
] == 1) {
1906 /* This is the last chance, better to slow
1907 * down than lose it.
1909 sata_down_spd_limit(ap
);
1910 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
1914 if (!tries
[dev
->devno
])
1915 ata_dev_disable(dev
);
1921 * ata_port_probe - Mark port as enabled
1922 * @ap: Port for which we indicate enablement
1924 * Modify @ap data structure such that the system
1925 * thinks that the entire port is enabled.
1927 * LOCKING: host lock, or some other form of
1931 void ata_port_probe(struct ata_port
*ap
)
1933 ap
->flags
&= ~ATA_FLAG_DISABLED
;
1937 * sata_print_link_status - Print SATA link status
1938 * @ap: SATA port to printk link status about
1940 * This function prints link speed and status of a SATA link.
1945 void sata_print_link_status(struct ata_port
*ap
)
1947 u32 sstatus
, scontrol
, tmp
;
1949 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
1951 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
1953 if (ata_port_online(ap
)) {
1954 tmp
= (sstatus
>> 4) & 0xf;
1955 ata_port_printk(ap
, KERN_INFO
,
1956 "SATA link up %s (SStatus %X SControl %X)\n",
1957 sata_spd_string(tmp
), sstatus
, scontrol
);
1959 ata_port_printk(ap
, KERN_INFO
,
1960 "SATA link down (SStatus %X SControl %X)\n",
1966 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1967 * @ap: SATA port associated with target SATA PHY.
1969 * This function issues commands to standard SATA Sxxx
1970 * PHY registers, to wake up the phy (and device), and
1971 * clear any reset condition.
1974 * PCI/etc. bus probe sem.
1977 void __sata_phy_reset(struct ata_port
*ap
)
1980 unsigned long timeout
= jiffies
+ (HZ
* 5);
1982 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1983 /* issue phy wake/reset */
1984 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1985 /* Couldn't find anything in SATA I/II specs, but
1986 * AHCI-1.1 10.4.2 says at least 1 ms. */
1989 /* phy wake/clear reset */
1990 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
1992 /* wait for phy to become ready, if necessary */
1995 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
1996 if ((sstatus
& 0xf) != 1)
1998 } while (time_before(jiffies
, timeout
));
2000 /* print link status */
2001 sata_print_link_status(ap
);
2003 /* TODO: phy layer with polling, timeouts, etc. */
2004 if (!ata_port_offline(ap
))
2007 ata_port_disable(ap
);
2009 if (ap
->flags
& ATA_FLAG_DISABLED
)
2012 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2013 ata_port_disable(ap
);
2017 ap
->cbl
= ATA_CBL_SATA
;
2021 * sata_phy_reset - Reset SATA bus.
2022 * @ap: SATA port associated with target SATA PHY.
2024 * This function resets the SATA bus, and then probes
2025 * the bus for devices.
2028 * PCI/etc. bus probe sem.
2031 void sata_phy_reset(struct ata_port
*ap
)
2033 __sata_phy_reset(ap
);
2034 if (ap
->flags
& ATA_FLAG_DISABLED
)
2040 * ata_dev_pair - return other device on cable
2043 * Obtain the other device on the same cable, or if none is
2044 * present NULL is returned
2047 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2049 struct ata_port
*ap
= adev
->ap
;
2050 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2051 if (!ata_dev_enabled(pair
))
2057 * ata_port_disable - Disable port.
2058 * @ap: Port to be disabled.
2060 * Modify @ap data structure such that the system
2061 * thinks that the entire port is disabled, and should
2062 * never attempt to probe or communicate with devices
2065 * LOCKING: host lock, or some other form of
2069 void ata_port_disable(struct ata_port
*ap
)
2071 ap
->device
[0].class = ATA_DEV_NONE
;
2072 ap
->device
[1].class = ATA_DEV_NONE
;
2073 ap
->flags
|= ATA_FLAG_DISABLED
;
2077 * sata_down_spd_limit - adjust SATA spd limit downward
2078 * @ap: Port to adjust SATA spd limit for
2080 * Adjust SATA spd limit of @ap downward. Note that this
2081 * function only adjusts the limit. The change must be applied
2082 * using sata_set_spd().
2085 * Inherited from caller.
2088 * 0 on success, negative errno on failure
2090 int sata_down_spd_limit(struct ata_port
*ap
)
2092 u32 sstatus
, spd
, mask
;
2095 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2099 mask
= ap
->sata_spd_limit
;
2102 highbit
= fls(mask
) - 1;
2103 mask
&= ~(1 << highbit
);
2105 spd
= (sstatus
>> 4) & 0xf;
2109 mask
&= (1 << spd
) - 1;
2113 ap
->sata_spd_limit
= mask
;
2115 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2116 sata_spd_string(fls(mask
)));
2121 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2125 if (ap
->sata_spd_limit
== UINT_MAX
)
2128 limit
= fls(ap
->sata_spd_limit
);
2130 spd
= (*scontrol
>> 4) & 0xf;
2131 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2133 return spd
!= limit
;
2137 * sata_set_spd_needed - is SATA spd configuration needed
2138 * @ap: Port in question
2140 * Test whether the spd limit in SControl matches
2141 * @ap->sata_spd_limit. This function is used to determine
2142 * whether hardreset is necessary to apply SATA spd
2146 * Inherited from caller.
2149 * 1 if SATA spd configuration is needed, 0 otherwise.
2151 int sata_set_spd_needed(struct ata_port
*ap
)
2155 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2158 return __sata_set_spd_needed(ap
, &scontrol
);
2162 * sata_set_spd - set SATA spd according to spd limit
2163 * @ap: Port to set SATA spd for
2165 * Set SATA spd of @ap according to sata_spd_limit.
2168 * Inherited from caller.
2171 * 0 if spd doesn't need to be changed, 1 if spd has been
2172 * changed. Negative errno if SCR registers are inaccessible.
2174 int sata_set_spd(struct ata_port
*ap
)
2179 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2182 if (!__sata_set_spd_needed(ap
, &scontrol
))
2185 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2192 * This mode timing computation functionality is ported over from
2193 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2196 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2197 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2198 * for UDMA6, which is currently supported only by Maxtor drives.
2200 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2203 static const struct ata_timing ata_timing
[] = {
2205 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2206 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2207 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2208 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2210 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2211 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2212 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2213 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2214 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2216 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2218 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2219 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2220 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2222 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2223 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2224 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2226 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2227 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2228 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2229 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2231 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2232 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2233 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2235 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2240 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2241 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2243 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2245 q
->setup
= EZ(t
->setup
* 1000, T
);
2246 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2247 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2248 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2249 q
->active
= EZ(t
->active
* 1000, T
);
2250 q
->recover
= EZ(t
->recover
* 1000, T
);
2251 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2252 q
->udma
= EZ(t
->udma
* 1000, UT
);
2255 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2256 struct ata_timing
*m
, unsigned int what
)
2258 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2259 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2260 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2261 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2262 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2263 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2264 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2265 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2268 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2270 const struct ata_timing
*t
;
2272 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2273 if (t
->mode
== 0xFF)
2278 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2279 struct ata_timing
*t
, int T
, int UT
)
2281 const struct ata_timing
*s
;
2282 struct ata_timing p
;
2288 if (!(s
= ata_timing_find_mode(speed
)))
2291 memcpy(t
, s
, sizeof(*s
));
2294 * If the drive is an EIDE drive, it can tell us it needs extended
2295 * PIO/MW_DMA cycle timing.
2298 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2299 memset(&p
, 0, sizeof(p
));
2300 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2301 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2302 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2303 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2304 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2306 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2310 * Convert the timing to bus clock counts.
2313 ata_timing_quantize(t
, t
, T
, UT
);
2316 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2317 * S.M.A.R.T * and some other commands. We have to ensure that the
2318 * DMA cycle timing is slower/equal than the fastest PIO timing.
2321 if (speed
> XFER_PIO_6
) {
2322 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2323 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2327 * Lengthen active & recovery time so that cycle time is correct.
2330 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2331 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2332 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2335 if (t
->active
+ t
->recover
< t
->cycle
) {
2336 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2337 t
->recover
= t
->cycle
- t
->active
;
2344 * ata_down_xfermask_limit - adjust dev xfer masks downward
2345 * @dev: Device to adjust xfer masks
2346 * @sel: ATA_DNXFER_* selector
2348 * Adjust xfer masks of @dev downward. Note that this function
2349 * does not apply the change. Invoking ata_set_mode() afterwards
2350 * will apply the limit.
2353 * Inherited from caller.
2356 * 0 on success, negative errno on failure
2358 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2361 unsigned int orig_mask
, xfer_mask
;
2362 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2365 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2366 sel
&= ~ATA_DNXFER_QUIET
;
2368 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2371 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2374 case ATA_DNXFER_PIO
:
2375 highbit
= fls(pio_mask
) - 1;
2376 pio_mask
&= ~(1 << highbit
);
2379 case ATA_DNXFER_DMA
:
2381 highbit
= fls(udma_mask
) - 1;
2382 udma_mask
&= ~(1 << highbit
);
2385 } else if (mwdma_mask
) {
2386 highbit
= fls(mwdma_mask
) - 1;
2387 mwdma_mask
&= ~(1 << highbit
);
2393 case ATA_DNXFER_40C
:
2394 udma_mask
&= ATA_UDMA_MASK_40C
;
2397 case ATA_DNXFER_FORCE_PIO0
:
2399 case ATA_DNXFER_FORCE_PIO
:
2408 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2410 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2414 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2415 snprintf(buf
, sizeof(buf
), "%s:%s",
2416 ata_mode_string(xfer_mask
),
2417 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2419 snprintf(buf
, sizeof(buf
), "%s",
2420 ata_mode_string(xfer_mask
));
2422 ata_dev_printk(dev
, KERN_WARNING
,
2423 "limiting speed to %s\n", buf
);
2426 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2432 static int ata_dev_set_mode(struct ata_device
*dev
)
2434 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2435 unsigned int err_mask
;
2438 dev
->flags
&= ~ATA_DFLAG_PIO
;
2439 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2440 dev
->flags
|= ATA_DFLAG_PIO
;
2442 err_mask
= ata_dev_set_xfermode(dev
);
2443 /* Old CFA may refuse this command, which is just fine */
2444 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2445 err_mask
&= ~AC_ERR_DEV
;
2448 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2449 "(err_mask=0x%x)\n", err_mask
);
2453 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2454 rc
= ata_dev_revalidate(dev
, 0);
2455 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2459 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2460 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2462 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2463 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2468 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2469 * @ap: port on which timings will be programmed
2470 * @r_failed_dev: out paramter for failed device
2472 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2473 * ata_set_mode() fails, pointer to the failing device is
2474 * returned in @r_failed_dev.
2477 * PCI/etc. bus probe sem.
2480 * 0 on success, negative errno otherwise
2482 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2484 struct ata_device
*dev
;
2485 int i
, rc
= 0, used_dma
= 0, found
= 0;
2487 /* has private set_mode? */
2488 if (ap
->ops
->set_mode
)
2489 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2491 /* step 1: calculate xfer_mask */
2492 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2493 unsigned int pio_mask
, dma_mask
;
2495 dev
= &ap
->device
[i
];
2497 if (!ata_dev_enabled(dev
))
2500 ata_dev_xfermask(dev
);
2502 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2503 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2504 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2505 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2514 /* step 2: always set host PIO timings */
2515 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2516 dev
= &ap
->device
[i
];
2517 if (!ata_dev_enabled(dev
))
2520 if (!dev
->pio_mode
) {
2521 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2526 dev
->xfer_mode
= dev
->pio_mode
;
2527 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2528 if (ap
->ops
->set_piomode
)
2529 ap
->ops
->set_piomode(ap
, dev
);
2532 /* step 3: set host DMA timings */
2533 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2534 dev
= &ap
->device
[i
];
2536 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2539 dev
->xfer_mode
= dev
->dma_mode
;
2540 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2541 if (ap
->ops
->set_dmamode
)
2542 ap
->ops
->set_dmamode(ap
, dev
);
2545 /* step 4: update devices' xfer mode */
2546 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2547 dev
= &ap
->device
[i
];
2549 /* don't update suspended devices' xfer mode */
2550 if (!ata_dev_ready(dev
))
2553 rc
= ata_dev_set_mode(dev
);
2558 /* Record simplex status. If we selected DMA then the other
2559 * host channels are not permitted to do so.
2561 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2562 ap
->host
->simplex_claimed
= ap
;
2564 /* step5: chip specific finalisation */
2565 if (ap
->ops
->post_set_mode
)
2566 ap
->ops
->post_set_mode(ap
);
2569 *r_failed_dev
= dev
;
2574 * ata_tf_to_host - issue ATA taskfile to host controller
2575 * @ap: port to which command is being issued
2576 * @tf: ATA taskfile register set
2578 * Issues ATA taskfile register set to ATA host controller,
2579 * with proper synchronization with interrupt handler and
2583 * spin_lock_irqsave(host lock)
2586 static inline void ata_tf_to_host(struct ata_port
*ap
,
2587 const struct ata_taskfile
*tf
)
2589 ap
->ops
->tf_load(ap
, tf
);
2590 ap
->ops
->exec_command(ap
, tf
);
2594 * ata_busy_sleep - sleep until BSY clears, or timeout
2595 * @ap: port containing status register to be polled
2596 * @tmout_pat: impatience timeout
2597 * @tmout: overall timeout
2599 * Sleep until ATA Status register bit BSY clears,
2600 * or a timeout occurs.
2603 * Kernel thread context (may sleep).
2606 * 0 on success, -errno otherwise.
2608 int ata_busy_sleep(struct ata_port
*ap
,
2609 unsigned long tmout_pat
, unsigned long tmout
)
2611 unsigned long timer_start
, timeout
;
2614 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2615 timer_start
= jiffies
;
2616 timeout
= timer_start
+ tmout_pat
;
2617 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2618 time_before(jiffies
, timeout
)) {
2620 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2623 if (status
!= 0xff && (status
& ATA_BUSY
))
2624 ata_port_printk(ap
, KERN_WARNING
,
2625 "port is slow to respond, please be patient "
2626 "(Status 0x%x)\n", status
);
2628 timeout
= timer_start
+ tmout
;
2629 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2630 time_before(jiffies
, timeout
)) {
2632 status
= ata_chk_status(ap
);
2638 if (status
& ATA_BUSY
) {
2639 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2640 "(%lu secs, Status 0x%x)\n",
2641 tmout
/ HZ
, status
);
2648 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2650 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2651 unsigned int dev0
= devmask
& (1 << 0);
2652 unsigned int dev1
= devmask
& (1 << 1);
2653 unsigned long timeout
;
2655 /* if device 0 was found in ata_devchk, wait for its
2659 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2661 /* if device 1 was found in ata_devchk, wait for
2662 * register access, then wait for BSY to clear
2664 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2668 ap
->ops
->dev_select(ap
, 1);
2669 nsect
= ioread8(ioaddr
->nsect_addr
);
2670 lbal
= ioread8(ioaddr
->lbal_addr
);
2671 if ((nsect
== 1) && (lbal
== 1))
2673 if (time_after(jiffies
, timeout
)) {
2677 msleep(50); /* give drive a breather */
2680 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2682 /* is all this really necessary? */
2683 ap
->ops
->dev_select(ap
, 0);
2685 ap
->ops
->dev_select(ap
, 1);
2687 ap
->ops
->dev_select(ap
, 0);
2690 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2691 unsigned int devmask
)
2693 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2695 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
2697 /* software reset. causes dev0 to be selected */
2698 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2699 udelay(20); /* FIXME: flush */
2700 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2701 udelay(20); /* FIXME: flush */
2702 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2704 /* spec mandates ">= 2ms" before checking status.
2705 * We wait 150ms, because that was the magic delay used for
2706 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2707 * between when the ATA command register is written, and then
2708 * status is checked. Because waiting for "a while" before
2709 * checking status is fine, post SRST, we perform this magic
2710 * delay here as well.
2712 * Old drivers/ide uses the 2mS rule and then waits for ready
2716 /* Before we perform post reset processing we want to see if
2717 * the bus shows 0xFF because the odd clown forgets the D7
2718 * pulldown resistor.
2720 if (ata_check_status(ap
) == 0xFF)
2723 ata_bus_post_reset(ap
, devmask
);
2729 * ata_bus_reset - reset host port and associated ATA channel
2730 * @ap: port to reset
2732 * This is typically the first time we actually start issuing
2733 * commands to the ATA channel. We wait for BSY to clear, then
2734 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2735 * result. Determine what devices, if any, are on the channel
2736 * by looking at the device 0/1 error register. Look at the signature
2737 * stored in each device's taskfile registers, to determine if
2738 * the device is ATA or ATAPI.
2741 * PCI/etc. bus probe sem.
2742 * Obtains host lock.
2745 * Sets ATA_FLAG_DISABLED if bus reset fails.
2748 void ata_bus_reset(struct ata_port
*ap
)
2750 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2751 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2753 unsigned int dev0
, dev1
= 0, devmask
= 0;
2755 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
2757 /* determine if device 0/1 are present */
2758 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2761 dev0
= ata_devchk(ap
, 0);
2763 dev1
= ata_devchk(ap
, 1);
2767 devmask
|= (1 << 0);
2769 devmask
|= (1 << 1);
2771 /* select device 0 again */
2772 ap
->ops
->dev_select(ap
, 0);
2774 /* issue bus reset */
2775 if (ap
->flags
& ATA_FLAG_SRST
)
2776 if (ata_bus_softreset(ap
, devmask
))
2780 * determine by signature whether we have ATA or ATAPI devices
2782 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2783 if ((slave_possible
) && (err
!= 0x81))
2784 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2786 /* re-enable interrupts */
2787 ap
->ops
->irq_on(ap
);
2789 /* is double-select really necessary? */
2790 if (ap
->device
[1].class != ATA_DEV_NONE
)
2791 ap
->ops
->dev_select(ap
, 1);
2792 if (ap
->device
[0].class != ATA_DEV_NONE
)
2793 ap
->ops
->dev_select(ap
, 0);
2795 /* if no devices were detected, disable this port */
2796 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2797 (ap
->device
[1].class == ATA_DEV_NONE
))
2800 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2801 /* set up device control for ATA_FLAG_SATA_RESET */
2802 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2809 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
2810 ap
->ops
->port_disable(ap
);
2816 * sata_phy_debounce - debounce SATA phy status
2817 * @ap: ATA port to debounce SATA phy status for
2818 * @params: timing parameters { interval, duratinon, timeout } in msec
2820 * Make sure SStatus of @ap reaches stable state, determined by
2821 * holding the same value where DET is not 1 for @duration polled
2822 * every @interval, before @timeout. Timeout constraints the
2823 * beginning of the stable state. Because, after hot unplugging,
2824 * DET gets stuck at 1 on some controllers, this functions waits
2825 * until timeout then returns 0 if DET is stable at 1.
2828 * Kernel thread context (may sleep)
2831 * 0 on success, -errno on failure.
2833 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
2835 unsigned long interval_msec
= params
[0];
2836 unsigned long duration
= params
[1] * HZ
/ 1000;
2837 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
2838 unsigned long last_jiffies
;
2842 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2847 last_jiffies
= jiffies
;
2850 msleep(interval_msec
);
2851 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
2857 if (cur
== 1 && time_before(jiffies
, timeout
))
2859 if (time_after(jiffies
, last_jiffies
+ duration
))
2864 /* unstable, start over */
2866 last_jiffies
= jiffies
;
2869 if (time_after(jiffies
, timeout
))
2875 * sata_phy_resume - resume SATA phy
2876 * @ap: ATA port to resume SATA phy for
2877 * @params: timing parameters { interval, duratinon, timeout } in msec
2879 * Resume SATA phy of @ap and debounce it.
2882 * Kernel thread context (may sleep)
2885 * 0 on success, -errno on failure.
2887 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
2892 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2895 scontrol
= (scontrol
& 0x0f0) | 0x300;
2897 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2900 /* Some PHYs react badly if SStatus is pounded immediately
2901 * after resuming. Delay 200ms before debouncing.
2905 return sata_phy_debounce(ap
, params
);
2908 static void ata_wait_spinup(struct ata_port
*ap
)
2910 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2911 unsigned long end
, secs
;
2914 /* first, debounce phy if SATA */
2915 if (ap
->cbl
== ATA_CBL_SATA
) {
2916 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
2918 /* if debounced successfully and offline, no need to wait */
2919 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
2923 /* okay, let's give the drive time to spin up */
2924 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
2925 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
2927 if (time_after(jiffies
, end
))
2931 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
2932 "(%lu secs)\n", secs
);
2934 schedule_timeout_uninterruptible(end
- jiffies
);
2938 * ata_std_prereset - prepare for reset
2939 * @ap: ATA port to be reset
2941 * @ap is about to be reset. Initialize it.
2944 * Kernel thread context (may sleep)
2947 * 0 on success, -errno otherwise.
2949 int ata_std_prereset(struct ata_port
*ap
)
2951 struct ata_eh_context
*ehc
= &ap
->eh_context
;
2952 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
2955 /* handle link resume & hotplug spinup */
2956 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
2957 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
2958 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2960 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
2961 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
2962 ata_wait_spinup(ap
);
2964 /* if we're about to do hardreset, nothing more to do */
2965 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
2968 /* if SATA, resume phy */
2969 if (ap
->cbl
== ATA_CBL_SATA
) {
2970 rc
= sata_phy_resume(ap
, timing
);
2971 if (rc
&& rc
!= -EOPNOTSUPP
) {
2972 /* phy resume failed */
2973 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
2974 "link for reset (errno=%d)\n", rc
);
2979 /* Wait for !BSY if the controller can wait for the first D2H
2980 * Reg FIS and we don't know that no device is attached.
2982 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
2983 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2989 * ata_std_softreset - reset host port via ATA SRST
2990 * @ap: port to reset
2991 * @classes: resulting classes of attached devices
2993 * Reset host port using ATA SRST.
2996 * Kernel thread context (may sleep)
2999 * 0 on success, -errno otherwise.
3001 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
3003 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3004 unsigned int devmask
= 0, err_mask
;
3009 if (ata_port_offline(ap
)) {
3010 classes
[0] = ATA_DEV_NONE
;
3014 /* determine if device 0/1 are present */
3015 if (ata_devchk(ap
, 0))
3016 devmask
|= (1 << 0);
3017 if (slave_possible
&& ata_devchk(ap
, 1))
3018 devmask
|= (1 << 1);
3020 /* select device 0 again */
3021 ap
->ops
->dev_select(ap
, 0);
3023 /* issue bus reset */
3024 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3025 err_mask
= ata_bus_softreset(ap
, devmask
);
3027 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
3032 /* determine by signature whether we have ATA or ATAPI devices */
3033 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3034 if (slave_possible
&& err
!= 0x81)
3035 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3038 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3043 * sata_port_hardreset - reset port via SATA phy reset
3044 * @ap: port to reset
3045 * @timing: timing parameters { interval, duratinon, timeout } in msec
3047 * SATA phy-reset host port using DET bits of SControl register.
3050 * Kernel thread context (may sleep)
3053 * 0 on success, -errno otherwise.
3055 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
3062 if (sata_set_spd_needed(ap
)) {
3063 /* SATA spec says nothing about how to reconfigure
3064 * spd. To be on the safe side, turn off phy during
3065 * reconfiguration. This works for at least ICH7 AHCI
3068 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3071 scontrol
= (scontrol
& 0x0f0) | 0x304;
3073 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3079 /* issue phy wake/reset */
3080 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3083 scontrol
= (scontrol
& 0x0f0) | 0x301;
3085 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3088 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3089 * 10.4.2 says at least 1 ms.
3093 /* bring phy back */
3094 rc
= sata_phy_resume(ap
, timing
);
3096 DPRINTK("EXIT, rc=%d\n", rc
);
3101 * sata_std_hardreset - reset host port via SATA phy reset
3102 * @ap: port to reset
3103 * @class: resulting class of attached device
3105 * SATA phy-reset host port using DET bits of SControl register,
3106 * wait for !BSY and classify the attached device.
3109 * Kernel thread context (may sleep)
3112 * 0 on success, -errno otherwise.
3114 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
3116 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3122 rc
= sata_port_hardreset(ap
, timing
);
3124 ata_port_printk(ap
, KERN_ERR
,
3125 "COMRESET failed (errno=%d)\n", rc
);
3129 /* TODO: phy layer with polling, timeouts, etc. */
3130 if (ata_port_offline(ap
)) {
3131 *class = ATA_DEV_NONE
;
3132 DPRINTK("EXIT, link offline\n");
3136 /* wait a while before checking status, see SRST for more info */
3139 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
3140 ata_port_printk(ap
, KERN_ERR
,
3141 "COMRESET failed (device not ready)\n");
3145 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3147 *class = ata_dev_try_classify(ap
, 0, NULL
);
3149 DPRINTK("EXIT, class=%u\n", *class);
3154 * ata_std_postreset - standard postreset callback
3155 * @ap: the target ata_port
3156 * @classes: classes of attached devices
3158 * This function is invoked after a successful reset. Note that
3159 * the device might have been reset more than once using
3160 * different reset methods before postreset is invoked.
3163 * Kernel thread context (may sleep)
3165 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3171 /* print link status */
3172 sata_print_link_status(ap
);
3175 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3176 sata_scr_write(ap
, SCR_ERROR
, serror
);
3178 /* re-enable interrupts */
3179 if (!ap
->ops
->error_handler
)
3180 ap
->ops
->irq_on(ap
);
3182 /* is double-select really necessary? */
3183 if (classes
[0] != ATA_DEV_NONE
)
3184 ap
->ops
->dev_select(ap
, 1);
3185 if (classes
[1] != ATA_DEV_NONE
)
3186 ap
->ops
->dev_select(ap
, 0);
3188 /* bail out if no device is present */
3189 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3190 DPRINTK("EXIT, no device\n");
3194 /* set up device control */
3195 if (ap
->ioaddr
.ctl_addr
)
3196 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3202 * ata_dev_same_device - Determine whether new ID matches configured device
3203 * @dev: device to compare against
3204 * @new_class: class of the new device
3205 * @new_id: IDENTIFY page of the new device
3207 * Compare @new_class and @new_id against @dev and determine
3208 * whether @dev is the device indicated by @new_class and
3215 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3217 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3220 const u16
*old_id
= dev
->id
;
3221 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3222 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3225 if (dev
->class != new_class
) {
3226 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3227 dev
->class, new_class
);
3231 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3232 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3233 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3234 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3235 new_n_sectors
= ata_id_n_sectors(new_id
);
3237 if (strcmp(model
[0], model
[1])) {
3238 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3239 "'%s' != '%s'\n", model
[0], model
[1]);
3243 if (strcmp(serial
[0], serial
[1])) {
3244 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3245 "'%s' != '%s'\n", serial
[0], serial
[1]);
3249 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3250 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3252 (unsigned long long)dev
->n_sectors
,
3253 (unsigned long long)new_n_sectors
);
3261 * ata_dev_revalidate - Revalidate ATA device
3262 * @dev: device to revalidate
3263 * @readid_flags: read ID flags
3265 * Re-read IDENTIFY page and make sure @dev is still attached to
3269 * Kernel thread context (may sleep)
3272 * 0 on success, negative errno otherwise
3274 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3276 unsigned int class = dev
->class;
3277 u16
*id
= (void *)dev
->ap
->sector_buf
;
3280 if (!ata_dev_enabled(dev
)) {
3286 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3290 /* is the device still there? */
3291 if (!ata_dev_same_device(dev
, class, id
)) {
3296 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3298 /* configure device according to the new ID */
3299 rc
= ata_dev_configure(dev
);
3304 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3308 struct ata_blacklist_entry
{
3309 const char *model_num
;
3310 const char *model_rev
;
3311 unsigned long horkage
;
3314 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3315 /* Devices with DMA related problems under Linux */
3316 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3317 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3318 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3319 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3320 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3321 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3322 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3323 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3324 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3325 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3326 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3327 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3328 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3329 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3330 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3331 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3332 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3333 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3334 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3335 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3336 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3337 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3338 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3339 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3340 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3341 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3342 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3343 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3344 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3346 /* Weird ATAPI devices */
3347 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
|
3348 ATA_HORKAGE_DMA_RW_ONLY
},
3350 /* Devices we expect to fail diagnostics */
3352 /* Devices where NCQ should be avoided */
3354 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3355 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3356 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3358 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3359 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3360 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3361 /* Blacklist entries taken from Silicon Image 3124/3132
3362 Windows driver .inf file - also several Linux problem reports */
3363 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3364 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3365 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3367 /* Devices with NCQ limits */
3373 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3375 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3376 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3377 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3379 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3380 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3382 while (ad
->model_num
) {
3383 if (!strcmp(ad
->model_num
, model_num
)) {
3384 if (ad
->model_rev
== NULL
)
3386 if (!strcmp(ad
->model_rev
, model_rev
))
3394 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3396 /* We don't support polling DMA.
3397 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3398 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3400 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3401 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3403 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3407 * ata_dev_xfermask - Compute supported xfermask of the given device
3408 * @dev: Device to compute xfermask for
3410 * Compute supported xfermask of @dev and store it in
3411 * dev->*_mask. This function is responsible for applying all
3412 * known limits including host controller limits, device
3418 static void ata_dev_xfermask(struct ata_device
*dev
)
3420 struct ata_port
*ap
= dev
->ap
;
3421 struct ata_host
*host
= ap
->host
;
3422 unsigned long xfer_mask
;
3424 /* controller modes available */
3425 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3426 ap
->mwdma_mask
, ap
->udma_mask
);
3428 /* Apply cable rule here. Don't apply it early because when
3429 * we handle hot plug the cable type can itself change.
3431 if (ap
->cbl
== ATA_CBL_PATA40
)
3432 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3433 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3434 * host side are checked drive side as well. Cases where we know a
3435 * 40wire cable is used safely for 80 are not checked here.
3437 if (ata_drive_40wire(dev
->id
) && (ap
->cbl
== ATA_CBL_PATA_UNK
|| ap
->cbl
== ATA_CBL_PATA80
))
3438 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3441 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3442 dev
->mwdma_mask
, dev
->udma_mask
);
3443 xfer_mask
&= ata_id_xfermask(dev
->id
);
3446 * CFA Advanced TrueIDE timings are not allowed on a shared
3449 if (ata_dev_pair(dev
)) {
3450 /* No PIO5 or PIO6 */
3451 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3452 /* No MWDMA3 or MWDMA 4 */
3453 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3456 if (ata_dma_blacklisted(dev
)) {
3457 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3458 ata_dev_printk(dev
, KERN_WARNING
,
3459 "device is on DMA blacklist, disabling DMA\n");
3462 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3463 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3464 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3465 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3466 "other device, disabling DMA\n");
3469 if (ap
->ops
->mode_filter
)
3470 xfer_mask
= ap
->ops
->mode_filter(ap
, dev
, xfer_mask
);
3472 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3473 &dev
->mwdma_mask
, &dev
->udma_mask
);
3477 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3478 * @dev: Device to which command will be sent
3480 * Issue SET FEATURES - XFER MODE command to device @dev
3484 * PCI/etc. bus probe sem.
3487 * 0 on success, AC_ERR_* mask otherwise.
3490 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3492 struct ata_taskfile tf
;
3493 unsigned int err_mask
;
3495 /* set up set-features taskfile */
3496 DPRINTK("set features - xfer mode\n");
3498 ata_tf_init(dev
, &tf
);
3499 tf
.command
= ATA_CMD_SET_FEATURES
;
3500 tf
.feature
= SETFEATURES_XFER
;
3501 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3502 tf
.protocol
= ATA_PROT_NODATA
;
3503 tf
.nsect
= dev
->xfer_mode
;
3505 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3507 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3512 * ata_dev_init_params - Issue INIT DEV PARAMS command
3513 * @dev: Device to which command will be sent
3514 * @heads: Number of heads (taskfile parameter)
3515 * @sectors: Number of sectors (taskfile parameter)
3518 * Kernel thread context (may sleep)
3521 * 0 on success, AC_ERR_* mask otherwise.
3523 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3524 u16 heads
, u16 sectors
)
3526 struct ata_taskfile tf
;
3527 unsigned int err_mask
;
3529 /* Number of sectors per track 1-255. Number of heads 1-16 */
3530 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3531 return AC_ERR_INVALID
;
3533 /* set up init dev params taskfile */
3534 DPRINTK("init dev params \n");
3536 ata_tf_init(dev
, &tf
);
3537 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3538 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3539 tf
.protocol
= ATA_PROT_NODATA
;
3541 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3543 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3545 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3550 * ata_sg_clean - Unmap DMA memory associated with command
3551 * @qc: Command containing DMA memory to be released
3553 * Unmap all mapped DMA memory associated with this command.
3556 * spin_lock_irqsave(host lock)
3558 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3560 struct ata_port
*ap
= qc
->ap
;
3561 struct scatterlist
*sg
= qc
->__sg
;
3562 int dir
= qc
->dma_dir
;
3563 void *pad_buf
= NULL
;
3565 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3566 WARN_ON(sg
== NULL
);
3568 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3569 WARN_ON(qc
->n_elem
> 1);
3571 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3573 /* if we padded the buffer out to 32-bit bound, and data
3574 * xfer direction is from-device, we must copy from the
3575 * pad buffer back into the supplied buffer
3577 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3578 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3580 if (qc
->flags
& ATA_QCFLAG_SG
) {
3582 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3583 /* restore last sg */
3584 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3586 struct scatterlist
*psg
= &qc
->pad_sgent
;
3587 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3588 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3589 kunmap_atomic(addr
, KM_IRQ0
);
3593 dma_unmap_single(ap
->dev
,
3594 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3597 sg
->length
+= qc
->pad_len
;
3599 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3600 pad_buf
, qc
->pad_len
);
3603 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3608 * ata_fill_sg - Fill PCI IDE PRD table
3609 * @qc: Metadata associated with taskfile to be transferred
3611 * Fill PCI IDE PRD (scatter-gather) table with segments
3612 * associated with the current disk command.
3615 * spin_lock_irqsave(host lock)
3618 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3620 struct ata_port
*ap
= qc
->ap
;
3621 struct scatterlist
*sg
;
3624 WARN_ON(qc
->__sg
== NULL
);
3625 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3628 ata_for_each_sg(sg
, qc
) {
3632 /* determine if physical DMA addr spans 64K boundary.
3633 * Note h/w doesn't support 64-bit, so we unconditionally
3634 * truncate dma_addr_t to u32.
3636 addr
= (u32
) sg_dma_address(sg
);
3637 sg_len
= sg_dma_len(sg
);
3640 offset
= addr
& 0xffff;
3642 if ((offset
+ sg_len
) > 0x10000)
3643 len
= 0x10000 - offset
;
3645 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3646 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3647 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3656 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3659 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3660 * @qc: Metadata associated with taskfile to check
3662 * Allow low-level driver to filter ATA PACKET commands, returning
3663 * a status indicating whether or not it is OK to use DMA for the
3664 * supplied PACKET command.
3667 * spin_lock_irqsave(host lock)
3669 * RETURNS: 0 when ATAPI DMA can be used
3672 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3674 struct ata_port
*ap
= qc
->ap
;
3675 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3677 /* some drives can only do ATAPI DMA on read/write */
3678 if (unlikely(qc
->dev
->horkage
& ATA_HORKAGE_DMA_RW_ONLY
)) {
3679 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
3680 u8
*scsicmd
= cmd
->cmnd
;
3682 switch (scsicmd
[0]) {
3689 /* atapi dma maybe ok */
3692 /* turn off atapi dma */
3697 if (ap
->ops
->check_atapi_dma
)
3698 rc
= ap
->ops
->check_atapi_dma(qc
);
3703 * ata_qc_prep - Prepare taskfile for submission
3704 * @qc: Metadata associated with taskfile to be prepared
3706 * Prepare ATA taskfile for submission.
3709 * spin_lock_irqsave(host lock)
3711 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3713 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3719 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
3722 * ata_sg_init_one - Associate command with memory buffer
3723 * @qc: Command to be associated
3724 * @buf: Memory buffer
3725 * @buflen: Length of memory buffer, in bytes.
3727 * Initialize the data-related elements of queued_cmd @qc
3728 * to point to a single memory buffer, @buf of byte length @buflen.
3731 * spin_lock_irqsave(host lock)
3734 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3736 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3738 qc
->__sg
= &qc
->sgent
;
3740 qc
->orig_n_elem
= 1;
3742 qc
->nbytes
= buflen
;
3744 sg_init_one(&qc
->sgent
, buf
, buflen
);
3748 * ata_sg_init - Associate command with scatter-gather table.
3749 * @qc: Command to be associated
3750 * @sg: Scatter-gather table.
3751 * @n_elem: Number of elements in s/g table.
3753 * Initialize the data-related elements of queued_cmd @qc
3754 * to point to a scatter-gather table @sg, containing @n_elem
3758 * spin_lock_irqsave(host lock)
3761 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3762 unsigned int n_elem
)
3764 qc
->flags
|= ATA_QCFLAG_SG
;
3766 qc
->n_elem
= n_elem
;
3767 qc
->orig_n_elem
= n_elem
;
3771 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3772 * @qc: Command with memory buffer to be mapped.
3774 * DMA-map the memory buffer associated with queued_cmd @qc.
3777 * spin_lock_irqsave(host lock)
3780 * Zero on success, negative on error.
3783 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3785 struct ata_port
*ap
= qc
->ap
;
3786 int dir
= qc
->dma_dir
;
3787 struct scatterlist
*sg
= qc
->__sg
;
3788 dma_addr_t dma_address
;
3791 /* we must lengthen transfers to end on a 32-bit boundary */
3792 qc
->pad_len
= sg
->length
& 3;
3794 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3795 struct scatterlist
*psg
= &qc
->pad_sgent
;
3797 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3799 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3801 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3802 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3805 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3806 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3808 sg
->length
-= qc
->pad_len
;
3809 if (sg
->length
== 0)
3812 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3813 sg
->length
, qc
->pad_len
);
3821 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
3823 if (dma_mapping_error(dma_address
)) {
3825 sg
->length
+= qc
->pad_len
;
3829 sg_dma_address(sg
) = dma_address
;
3830 sg_dma_len(sg
) = sg
->length
;
3833 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3834 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3840 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3841 * @qc: Command with scatter-gather table to be mapped.
3843 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3846 * spin_lock_irqsave(host lock)
3849 * Zero on success, negative on error.
3853 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3855 struct ata_port
*ap
= qc
->ap
;
3856 struct scatterlist
*sg
= qc
->__sg
;
3857 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3858 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3860 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
3861 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
3863 /* we must lengthen transfers to end on a 32-bit boundary */
3864 qc
->pad_len
= lsg
->length
& 3;
3866 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3867 struct scatterlist
*psg
= &qc
->pad_sgent
;
3868 unsigned int offset
;
3870 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
3872 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3875 * psg->page/offset are used to copy to-be-written
3876 * data in this function or read data in ata_sg_clean.
3878 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3879 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3880 psg
->offset
= offset_in_page(offset
);
3882 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3883 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3884 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3885 kunmap_atomic(addr
, KM_IRQ0
);
3888 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3889 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3891 lsg
->length
-= qc
->pad_len
;
3892 if (lsg
->length
== 0)
3895 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3896 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3899 pre_n_elem
= qc
->n_elem
;
3900 if (trim_sg
&& pre_n_elem
)
3909 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
3911 /* restore last sg */
3912 lsg
->length
+= qc
->pad_len
;
3916 DPRINTK("%d sg elements mapped\n", n_elem
);
3919 qc
->n_elem
= n_elem
;
3925 * swap_buf_le16 - swap halves of 16-bit words in place
3926 * @buf: Buffer to swap
3927 * @buf_words: Number of 16-bit words in buffer.
3929 * Swap halves of 16-bit words if needed to convert from
3930 * little-endian byte order to native cpu byte order, or
3934 * Inherited from caller.
3936 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3941 for (i
= 0; i
< buf_words
; i
++)
3942 buf
[i
] = le16_to_cpu(buf
[i
]);
3943 #endif /* __BIG_ENDIAN */
3947 * ata_data_xfer - Transfer data by PIO
3948 * @adev: device to target
3950 * @buflen: buffer length
3951 * @write_data: read/write
3953 * Transfer data from/to the device data register by PIO.
3956 * Inherited from caller.
3958 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
3959 unsigned int buflen
, int write_data
)
3961 struct ata_port
*ap
= adev
->ap
;
3962 unsigned int words
= buflen
>> 1;
3964 /* Transfer multiple of 2 bytes */
3966 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3968 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
3970 /* Transfer trailing 1 byte, if any. */
3971 if (unlikely(buflen
& 0x01)) {
3972 u16 align_buf
[1] = { 0 };
3973 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3976 memcpy(align_buf
, trailing_buf
, 1);
3977 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3979 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
3980 memcpy(trailing_buf
, align_buf
, 1);
3986 * ata_data_xfer_noirq - Transfer data by PIO
3987 * @adev: device to target
3989 * @buflen: buffer length
3990 * @write_data: read/write
3992 * Transfer data from/to the device data register by PIO. Do the
3993 * transfer with interrupts disabled.
3996 * Inherited from caller.
3998 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
3999 unsigned int buflen
, int write_data
)
4001 unsigned long flags
;
4002 local_irq_save(flags
);
4003 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4004 local_irq_restore(flags
);
4009 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
4010 * @qc: Command on going
4012 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
4015 * Inherited from caller.
4018 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4020 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4021 struct scatterlist
*sg
= qc
->__sg
;
4022 struct ata_port
*ap
= qc
->ap
;
4024 unsigned int offset
;
4027 if (qc
->curbytes
== qc
->nbytes
- ATA_SECT_SIZE
)
4028 ap
->hsm_task_state
= HSM_ST_LAST
;
4030 page
= sg
[qc
->cursg
].page
;
4031 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4033 /* get the current page and offset */
4034 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4035 offset
%= PAGE_SIZE
;
4037 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4039 if (PageHighMem(page
)) {
4040 unsigned long flags
;
4042 /* FIXME: use a bounce buffer */
4043 local_irq_save(flags
);
4044 buf
= kmap_atomic(page
, KM_IRQ0
);
4046 /* do the actual data transfer */
4047 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
4049 kunmap_atomic(buf
, KM_IRQ0
);
4050 local_irq_restore(flags
);
4052 buf
= page_address(page
);
4053 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
4056 qc
->curbytes
+= ATA_SECT_SIZE
;
4057 qc
->cursg_ofs
+= ATA_SECT_SIZE
;
4059 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4066 * ata_pio_sectors - Transfer one or many 512-byte sectors.
4067 * @qc: Command on going
4069 * Transfer one or many ATA_SECT_SIZE of data from/to the
4070 * ATA device for the DRQ request.
4073 * Inherited from caller.
4076 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4078 if (is_multi_taskfile(&qc
->tf
)) {
4079 /* READ/WRITE MULTIPLE */
4082 WARN_ON(qc
->dev
->multi_count
== 0);
4084 nsect
= min((qc
->nbytes
- qc
->curbytes
) / ATA_SECT_SIZE
,
4085 qc
->dev
->multi_count
);
4093 * atapi_send_cdb - Write CDB bytes to hardware
4094 * @ap: Port to which ATAPI device is attached.
4095 * @qc: Taskfile currently active
4097 * When device has indicated its readiness to accept
4098 * a CDB, this function is called. Send the CDB.
4104 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4107 DPRINTK("send cdb\n");
4108 WARN_ON(qc
->dev
->cdb_len
< 12);
4110 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4111 ata_altstatus(ap
); /* flush */
4113 switch (qc
->tf
.protocol
) {
4114 case ATA_PROT_ATAPI
:
4115 ap
->hsm_task_state
= HSM_ST
;
4117 case ATA_PROT_ATAPI_NODATA
:
4118 ap
->hsm_task_state
= HSM_ST_LAST
;
4120 case ATA_PROT_ATAPI_DMA
:
4121 ap
->hsm_task_state
= HSM_ST_LAST
;
4122 /* initiate bmdma */
4123 ap
->ops
->bmdma_start(qc
);
4129 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4130 * @qc: Command on going
4131 * @bytes: number of bytes
4133 * Transfer Transfer data from/to the ATAPI device.
4136 * Inherited from caller.
4140 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4142 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4143 struct scatterlist
*sg
= qc
->__sg
;
4144 struct ata_port
*ap
= qc
->ap
;
4147 unsigned int offset
, count
;
4149 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4150 ap
->hsm_task_state
= HSM_ST_LAST
;
4153 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4155 * The end of qc->sg is reached and the device expects
4156 * more data to transfer. In order not to overrun qc->sg
4157 * and fulfill length specified in the byte count register,
4158 * - for read case, discard trailing data from the device
4159 * - for write case, padding zero data to the device
4161 u16 pad_buf
[1] = { 0 };
4162 unsigned int words
= bytes
>> 1;
4165 if (words
) /* warning if bytes > 1 */
4166 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4167 "%u bytes trailing data\n", bytes
);
4169 for (i
= 0; i
< words
; i
++)
4170 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4172 ap
->hsm_task_state
= HSM_ST_LAST
;
4176 sg
= &qc
->__sg
[qc
->cursg
];
4179 offset
= sg
->offset
+ qc
->cursg_ofs
;
4181 /* get the current page and offset */
4182 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4183 offset
%= PAGE_SIZE
;
4185 /* don't overrun current sg */
4186 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4188 /* don't cross page boundaries */
4189 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4191 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4193 if (PageHighMem(page
)) {
4194 unsigned long flags
;
4196 /* FIXME: use bounce buffer */
4197 local_irq_save(flags
);
4198 buf
= kmap_atomic(page
, KM_IRQ0
);
4200 /* do the actual data transfer */
4201 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4203 kunmap_atomic(buf
, KM_IRQ0
);
4204 local_irq_restore(flags
);
4206 buf
= page_address(page
);
4207 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4211 qc
->curbytes
+= count
;
4212 qc
->cursg_ofs
+= count
;
4214 if (qc
->cursg_ofs
== sg
->length
) {
4224 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4225 * @qc: Command on going
4227 * Transfer Transfer data from/to the ATAPI device.
4230 * Inherited from caller.
4233 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4235 struct ata_port
*ap
= qc
->ap
;
4236 struct ata_device
*dev
= qc
->dev
;
4237 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4238 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4240 /* Abuse qc->result_tf for temp storage of intermediate TF
4241 * here to save some kernel stack usage.
4242 * For normal completion, qc->result_tf is not relevant. For
4243 * error, qc->result_tf is later overwritten by ata_qc_complete().
4244 * So, the correctness of qc->result_tf is not affected.
4246 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4247 ireason
= qc
->result_tf
.nsect
;
4248 bc_lo
= qc
->result_tf
.lbam
;
4249 bc_hi
= qc
->result_tf
.lbah
;
4250 bytes
= (bc_hi
<< 8) | bc_lo
;
4252 /* shall be cleared to zero, indicating xfer of data */
4253 if (ireason
& (1 << 0))
4256 /* make sure transfer direction matches expected */
4257 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4258 if (do_write
!= i_write
)
4261 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4263 __atapi_pio_bytes(qc
, bytes
);
4268 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4269 qc
->err_mask
|= AC_ERR_HSM
;
4270 ap
->hsm_task_state
= HSM_ST_ERR
;
4274 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4275 * @ap: the target ata_port
4279 * 1 if ok in workqueue, 0 otherwise.
4282 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4284 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4287 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4288 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4289 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4292 if (is_atapi_taskfile(&qc
->tf
) &&
4293 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4301 * ata_hsm_qc_complete - finish a qc running on standard HSM
4302 * @qc: Command to complete
4303 * @in_wq: 1 if called from workqueue, 0 otherwise
4305 * Finish @qc which is running on standard HSM.
4308 * If @in_wq is zero, spin_lock_irqsave(host lock).
4309 * Otherwise, none on entry and grabs host lock.
4311 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4313 struct ata_port
*ap
= qc
->ap
;
4314 unsigned long flags
;
4316 if (ap
->ops
->error_handler
) {
4318 spin_lock_irqsave(ap
->lock
, flags
);
4320 /* EH might have kicked in while host lock is
4323 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4325 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4326 ap
->ops
->irq_on(ap
);
4327 ata_qc_complete(qc
);
4329 ata_port_freeze(ap
);
4332 spin_unlock_irqrestore(ap
->lock
, flags
);
4334 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4335 ata_qc_complete(qc
);
4337 ata_port_freeze(ap
);
4341 spin_lock_irqsave(ap
->lock
, flags
);
4342 ap
->ops
->irq_on(ap
);
4343 ata_qc_complete(qc
);
4344 spin_unlock_irqrestore(ap
->lock
, flags
);
4346 ata_qc_complete(qc
);
4349 ata_altstatus(ap
); /* flush */
4353 * ata_hsm_move - move the HSM to the next state.
4354 * @ap: the target ata_port
4356 * @status: current device status
4357 * @in_wq: 1 if called from workqueue, 0 otherwise
4360 * 1 when poll next status needed, 0 otherwise.
4362 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4363 u8 status
, int in_wq
)
4365 unsigned long flags
= 0;
4368 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4370 /* Make sure ata_qc_issue_prot() does not throw things
4371 * like DMA polling into the workqueue. Notice that
4372 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4374 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4377 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4378 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4380 switch (ap
->hsm_task_state
) {
4382 /* Send first data block or PACKET CDB */
4384 /* If polling, we will stay in the work queue after
4385 * sending the data. Otherwise, interrupt handler
4386 * takes over after sending the data.
4388 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4390 /* check device status */
4391 if (unlikely((status
& ATA_DRQ
) == 0)) {
4392 /* handle BSY=0, DRQ=0 as error */
4393 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4394 /* device stops HSM for abort/error */
4395 qc
->err_mask
|= AC_ERR_DEV
;
4397 /* HSM violation. Let EH handle this */
4398 qc
->err_mask
|= AC_ERR_HSM
;
4400 ap
->hsm_task_state
= HSM_ST_ERR
;
4404 /* Device should not ask for data transfer (DRQ=1)
4405 * when it finds something wrong.
4406 * We ignore DRQ here and stop the HSM by
4407 * changing hsm_task_state to HSM_ST_ERR and
4408 * let the EH abort the command or reset the device.
4410 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4411 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4412 "error, dev_stat 0x%X\n", status
);
4413 qc
->err_mask
|= AC_ERR_HSM
;
4414 ap
->hsm_task_state
= HSM_ST_ERR
;
4418 /* Send the CDB (atapi) or the first data block (ata pio out).
4419 * During the state transition, interrupt handler shouldn't
4420 * be invoked before the data transfer is complete and
4421 * hsm_task_state is changed. Hence, the following locking.
4424 spin_lock_irqsave(ap
->lock
, flags
);
4426 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4427 /* PIO data out protocol.
4428 * send first data block.
4431 /* ata_pio_sectors() might change the state
4432 * to HSM_ST_LAST. so, the state is changed here
4433 * before ata_pio_sectors().
4435 ap
->hsm_task_state
= HSM_ST
;
4436 ata_pio_sectors(qc
);
4437 ata_altstatus(ap
); /* flush */
4440 atapi_send_cdb(ap
, qc
);
4443 spin_unlock_irqrestore(ap
->lock
, flags
);
4445 /* if polling, ata_pio_task() handles the rest.
4446 * otherwise, interrupt handler takes over from here.
4451 /* complete command or read/write the data register */
4452 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4453 /* ATAPI PIO protocol */
4454 if ((status
& ATA_DRQ
) == 0) {
4455 /* No more data to transfer or device error.
4456 * Device error will be tagged in HSM_ST_LAST.
4458 ap
->hsm_task_state
= HSM_ST_LAST
;
4462 /* Device should not ask for data transfer (DRQ=1)
4463 * when it finds something wrong.
4464 * We ignore DRQ here and stop the HSM by
4465 * changing hsm_task_state to HSM_ST_ERR and
4466 * let the EH abort the command or reset the device.
4468 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4469 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
4470 "device error, dev_stat 0x%X\n",
4472 qc
->err_mask
|= AC_ERR_HSM
;
4473 ap
->hsm_task_state
= HSM_ST_ERR
;
4477 atapi_pio_bytes(qc
);
4479 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4480 /* bad ireason reported by device */
4484 /* ATA PIO protocol */
4485 if (unlikely((status
& ATA_DRQ
) == 0)) {
4486 /* handle BSY=0, DRQ=0 as error */
4487 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4488 /* device stops HSM for abort/error */
4489 qc
->err_mask
|= AC_ERR_DEV
;
4491 /* HSM violation. Let EH handle this.
4492 * Phantom devices also trigger this
4493 * condition. Mark hint.
4495 qc
->err_mask
|= AC_ERR_HSM
|
4498 ap
->hsm_task_state
= HSM_ST_ERR
;
4502 /* For PIO reads, some devices may ask for
4503 * data transfer (DRQ=1) alone with ERR=1.
4504 * We respect DRQ here and transfer one
4505 * block of junk data before changing the
4506 * hsm_task_state to HSM_ST_ERR.
4508 * For PIO writes, ERR=1 DRQ=1 doesn't make
4509 * sense since the data block has been
4510 * transferred to the device.
4512 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4513 /* data might be corrputed */
4514 qc
->err_mask
|= AC_ERR_DEV
;
4516 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4517 ata_pio_sectors(qc
);
4519 status
= ata_wait_idle(ap
);
4522 if (status
& (ATA_BUSY
| ATA_DRQ
))
4523 qc
->err_mask
|= AC_ERR_HSM
;
4525 /* ata_pio_sectors() might change the
4526 * state to HSM_ST_LAST. so, the state
4527 * is changed after ata_pio_sectors().
4529 ap
->hsm_task_state
= HSM_ST_ERR
;
4533 ata_pio_sectors(qc
);
4535 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4536 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4539 status
= ata_wait_idle(ap
);
4544 ata_altstatus(ap
); /* flush */
4549 if (unlikely(!ata_ok(status
))) {
4550 qc
->err_mask
|= __ac_err_mask(status
);
4551 ap
->hsm_task_state
= HSM_ST_ERR
;
4555 /* no more data to transfer */
4556 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4557 ap
->print_id
, qc
->dev
->devno
, status
);
4559 WARN_ON(qc
->err_mask
);
4561 ap
->hsm_task_state
= HSM_ST_IDLE
;
4563 /* complete taskfile transaction */
4564 ata_hsm_qc_complete(qc
, in_wq
);
4570 /* make sure qc->err_mask is available to
4571 * know what's wrong and recover
4573 WARN_ON(qc
->err_mask
== 0);
4575 ap
->hsm_task_state
= HSM_ST_IDLE
;
4577 /* complete taskfile transaction */
4578 ata_hsm_qc_complete(qc
, in_wq
);
4590 static void ata_pio_task(struct work_struct
*work
)
4592 struct ata_port
*ap
=
4593 container_of(work
, struct ata_port
, port_task
.work
);
4594 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
4599 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4602 * This is purely heuristic. This is a fast path.
4603 * Sometimes when we enter, BSY will be cleared in
4604 * a chk-status or two. If not, the drive is probably seeking
4605 * or something. Snooze for a couple msecs, then
4606 * chk-status again. If still busy, queue delayed work.
4608 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4609 if (status
& ATA_BUSY
) {
4611 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4612 if (status
& ATA_BUSY
) {
4613 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4619 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4621 /* another command or interrupt handler
4622 * may be running at this point.
4629 * ata_qc_new - Request an available ATA command, for queueing
4630 * @ap: Port associated with device @dev
4631 * @dev: Device from whom we request an available command structure
4637 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4639 struct ata_queued_cmd
*qc
= NULL
;
4642 /* no command while frozen */
4643 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4646 /* the last tag is reserved for internal command. */
4647 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4648 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4649 qc
= __ata_qc_from_tag(ap
, i
);
4660 * ata_qc_new_init - Request an available ATA command, and initialize it
4661 * @dev: Device from whom we request an available command structure
4667 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4669 struct ata_port
*ap
= dev
->ap
;
4670 struct ata_queued_cmd
*qc
;
4672 qc
= ata_qc_new(ap
);
4685 * ata_qc_free - free unused ata_queued_cmd
4686 * @qc: Command to complete
4688 * Designed to free unused ata_queued_cmd object
4689 * in case something prevents using it.
4692 * spin_lock_irqsave(host lock)
4694 void ata_qc_free(struct ata_queued_cmd
*qc
)
4696 struct ata_port
*ap
= qc
->ap
;
4699 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4703 if (likely(ata_tag_valid(tag
))) {
4704 qc
->tag
= ATA_TAG_POISON
;
4705 clear_bit(tag
, &ap
->qc_allocated
);
4709 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4711 struct ata_port
*ap
= qc
->ap
;
4713 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4714 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4716 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4719 /* command should be marked inactive atomically with qc completion */
4720 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
4721 ap
->sactive
&= ~(1 << qc
->tag
);
4723 ap
->active_tag
= ATA_TAG_POISON
;
4725 /* atapi: mark qc as inactive to prevent the interrupt handler
4726 * from completing the command twice later, before the error handler
4727 * is called. (when rc != 0 and atapi request sense is needed)
4729 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4730 ap
->qc_active
&= ~(1 << qc
->tag
);
4732 /* call completion callback */
4733 qc
->complete_fn(qc
);
4736 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4738 struct ata_port
*ap
= qc
->ap
;
4740 qc
->result_tf
.flags
= qc
->tf
.flags
;
4741 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4745 * ata_qc_complete - Complete an active ATA command
4746 * @qc: Command to complete
4747 * @err_mask: ATA Status register contents
4749 * Indicate to the mid and upper layers that an ATA
4750 * command has completed, with either an ok or not-ok status.
4753 * spin_lock_irqsave(host lock)
4755 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4757 struct ata_port
*ap
= qc
->ap
;
4759 /* XXX: New EH and old EH use different mechanisms to
4760 * synchronize EH with regular execution path.
4762 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4763 * Normal execution path is responsible for not accessing a
4764 * failed qc. libata core enforces the rule by returning NULL
4765 * from ata_qc_from_tag() for failed qcs.
4767 * Old EH depends on ata_qc_complete() nullifying completion
4768 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4769 * not synchronize with interrupt handler. Only PIO task is
4772 if (ap
->ops
->error_handler
) {
4773 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4775 if (unlikely(qc
->err_mask
))
4776 qc
->flags
|= ATA_QCFLAG_FAILED
;
4778 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4779 if (!ata_tag_internal(qc
->tag
)) {
4780 /* always fill result TF for failed qc */
4782 ata_qc_schedule_eh(qc
);
4787 /* read result TF if requested */
4788 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4791 __ata_qc_complete(qc
);
4793 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4796 /* read result TF if failed or requested */
4797 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4800 __ata_qc_complete(qc
);
4805 * ata_qc_complete_multiple - Complete multiple qcs successfully
4806 * @ap: port in question
4807 * @qc_active: new qc_active mask
4808 * @finish_qc: LLDD callback invoked before completing a qc
4810 * Complete in-flight commands. This functions is meant to be
4811 * called from low-level driver's interrupt routine to complete
4812 * requests normally. ap->qc_active and @qc_active is compared
4813 * and commands are completed accordingly.
4816 * spin_lock_irqsave(host lock)
4819 * Number of completed commands on success, -errno otherwise.
4821 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4822 void (*finish_qc
)(struct ata_queued_cmd
*))
4828 done_mask
= ap
->qc_active
^ qc_active
;
4830 if (unlikely(done_mask
& qc_active
)) {
4831 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4832 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4836 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4837 struct ata_queued_cmd
*qc
;
4839 if (!(done_mask
& (1 << i
)))
4842 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4845 ata_qc_complete(qc
);
4853 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4855 struct ata_port
*ap
= qc
->ap
;
4857 switch (qc
->tf
.protocol
) {
4860 case ATA_PROT_ATAPI_DMA
:
4863 case ATA_PROT_ATAPI
:
4865 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4878 * ata_qc_issue - issue taskfile to device
4879 * @qc: command to issue to device
4881 * Prepare an ATA command to submission to device.
4882 * This includes mapping the data into a DMA-able
4883 * area, filling in the S/G table, and finally
4884 * writing the taskfile to hardware, starting the command.
4887 * spin_lock_irqsave(host lock)
4889 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4891 struct ata_port
*ap
= qc
->ap
;
4893 /* Make sure only one non-NCQ command is outstanding. The
4894 * check is skipped for old EH because it reuses active qc to
4895 * request ATAPI sense.
4897 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
4899 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4900 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
4901 ap
->sactive
|= 1 << qc
->tag
;
4903 WARN_ON(ap
->sactive
);
4904 ap
->active_tag
= qc
->tag
;
4907 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4908 ap
->qc_active
|= 1 << qc
->tag
;
4910 if (ata_should_dma_map(qc
)) {
4911 if (qc
->flags
& ATA_QCFLAG_SG
) {
4912 if (ata_sg_setup(qc
))
4914 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4915 if (ata_sg_setup_one(qc
))
4919 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4922 ap
->ops
->qc_prep(qc
);
4924 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4925 if (unlikely(qc
->err_mask
))
4930 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4931 qc
->err_mask
|= AC_ERR_SYSTEM
;
4933 ata_qc_complete(qc
);
4937 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4938 * @qc: command to issue to device
4940 * Using various libata functions and hooks, this function
4941 * starts an ATA command. ATA commands are grouped into
4942 * classes called "protocols", and issuing each type of protocol
4943 * is slightly different.
4945 * May be used as the qc_issue() entry in ata_port_operations.
4948 * spin_lock_irqsave(host lock)
4951 * Zero on success, AC_ERR_* mask on failure
4954 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4956 struct ata_port
*ap
= qc
->ap
;
4958 /* Use polling pio if the LLD doesn't handle
4959 * interrupt driven pio and atapi CDB interrupt.
4961 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
4962 switch (qc
->tf
.protocol
) {
4964 case ATA_PROT_NODATA
:
4965 case ATA_PROT_ATAPI
:
4966 case ATA_PROT_ATAPI_NODATA
:
4967 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4969 case ATA_PROT_ATAPI_DMA
:
4970 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
4971 /* see ata_dma_blacklisted() */
4979 /* Some controllers show flaky interrupt behavior after
4980 * setting xfer mode. Use polling instead.
4982 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
4983 qc
->tf
.feature
== SETFEATURES_XFER
) &&
4984 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
4985 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
4987 /* select the device */
4988 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4990 /* start the command */
4991 switch (qc
->tf
.protocol
) {
4992 case ATA_PROT_NODATA
:
4993 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4994 ata_qc_set_polling(qc
);
4996 ata_tf_to_host(ap
, &qc
->tf
);
4997 ap
->hsm_task_state
= HSM_ST_LAST
;
4999 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5000 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5005 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5007 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5008 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5009 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5010 ap
->hsm_task_state
= HSM_ST_LAST
;
5014 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5015 ata_qc_set_polling(qc
);
5017 ata_tf_to_host(ap
, &qc
->tf
);
5019 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5020 /* PIO data out protocol */
5021 ap
->hsm_task_state
= HSM_ST_FIRST
;
5022 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5024 /* always send first data block using
5025 * the ata_pio_task() codepath.
5028 /* PIO data in protocol */
5029 ap
->hsm_task_state
= HSM_ST
;
5031 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5032 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5034 /* if polling, ata_pio_task() handles the rest.
5035 * otherwise, interrupt handler takes over from here.
5041 case ATA_PROT_ATAPI
:
5042 case ATA_PROT_ATAPI_NODATA
:
5043 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5044 ata_qc_set_polling(qc
);
5046 ata_tf_to_host(ap
, &qc
->tf
);
5048 ap
->hsm_task_state
= HSM_ST_FIRST
;
5050 /* send cdb by polling if no cdb interrupt */
5051 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5052 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5053 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5056 case ATA_PROT_ATAPI_DMA
:
5057 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5059 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5060 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5061 ap
->hsm_task_state
= HSM_ST_FIRST
;
5063 /* send cdb by polling if no cdb interrupt */
5064 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5065 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5070 return AC_ERR_SYSTEM
;
5077 * ata_host_intr - Handle host interrupt for given (port, task)
5078 * @ap: Port on which interrupt arrived (possibly...)
5079 * @qc: Taskfile currently active in engine
5081 * Handle host interrupt for given queued command. Currently,
5082 * only DMA interrupts are handled. All other commands are
5083 * handled via polling with interrupts disabled (nIEN bit).
5086 * spin_lock_irqsave(host lock)
5089 * One if interrupt was handled, zero if not (shared irq).
5092 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5093 struct ata_queued_cmd
*qc
)
5095 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5096 u8 status
, host_stat
= 0;
5098 VPRINTK("ata%u: protocol %d task_state %d\n",
5099 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5101 /* Check whether we are expecting interrupt in this state */
5102 switch (ap
->hsm_task_state
) {
5104 /* Some pre-ATAPI-4 devices assert INTRQ
5105 * at this state when ready to receive CDB.
5108 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5109 * The flag was turned on only for atapi devices.
5110 * No need to check is_atapi_taskfile(&qc->tf) again.
5112 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5116 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5117 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5118 /* check status of DMA engine */
5119 host_stat
= ap
->ops
->bmdma_status(ap
);
5120 VPRINTK("ata%u: host_stat 0x%X\n",
5121 ap
->print_id
, host_stat
);
5123 /* if it's not our irq... */
5124 if (!(host_stat
& ATA_DMA_INTR
))
5127 /* before we do anything else, clear DMA-Start bit */
5128 ap
->ops
->bmdma_stop(qc
);
5130 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5131 /* error when transfering data to/from memory */
5132 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5133 ap
->hsm_task_state
= HSM_ST_ERR
;
5143 /* check altstatus */
5144 status
= ata_altstatus(ap
);
5145 if (status
& ATA_BUSY
)
5148 /* check main status, clearing INTRQ */
5149 status
= ata_chk_status(ap
);
5150 if (unlikely(status
& ATA_BUSY
))
5153 /* ack bmdma irq events */
5154 ap
->ops
->irq_clear(ap
);
5156 ata_hsm_move(ap
, qc
, status
, 0);
5158 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5159 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5160 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5162 return 1; /* irq handled */
5165 ap
->stats
.idle_irq
++;
5168 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5169 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5170 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5174 return 0; /* irq not handled */
5178 * ata_interrupt - Default ATA host interrupt handler
5179 * @irq: irq line (unused)
5180 * @dev_instance: pointer to our ata_host information structure
5182 * Default interrupt handler for PCI IDE devices. Calls
5183 * ata_host_intr() for each port that is not disabled.
5186 * Obtains host lock during operation.
5189 * IRQ_NONE or IRQ_HANDLED.
5192 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5194 struct ata_host
*host
= dev_instance
;
5196 unsigned int handled
= 0;
5197 unsigned long flags
;
5199 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5200 spin_lock_irqsave(&host
->lock
, flags
);
5202 for (i
= 0; i
< host
->n_ports
; i
++) {
5203 struct ata_port
*ap
;
5205 ap
= host
->ports
[i
];
5207 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5208 struct ata_queued_cmd
*qc
;
5210 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5211 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5212 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5213 handled
|= ata_host_intr(ap
, qc
);
5217 spin_unlock_irqrestore(&host
->lock
, flags
);
5219 return IRQ_RETVAL(handled
);
5223 * sata_scr_valid - test whether SCRs are accessible
5224 * @ap: ATA port to test SCR accessibility for
5226 * Test whether SCRs are accessible for @ap.
5232 * 1 if SCRs are accessible, 0 otherwise.
5234 int sata_scr_valid(struct ata_port
*ap
)
5236 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5240 * sata_scr_read - read SCR register of the specified port
5241 * @ap: ATA port to read SCR for
5243 * @val: Place to store read value
5245 * Read SCR register @reg of @ap into *@val. This function is
5246 * guaranteed to succeed if the cable type of the port is SATA
5247 * and the port implements ->scr_read.
5253 * 0 on success, negative errno on failure.
5255 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5257 if (sata_scr_valid(ap
)) {
5258 *val
= ap
->ops
->scr_read(ap
, reg
);
5265 * sata_scr_write - write SCR register of the specified port
5266 * @ap: ATA port to write SCR for
5267 * @reg: SCR to write
5268 * @val: value to write
5270 * Write @val to SCR register @reg of @ap. This function is
5271 * guaranteed to succeed if the cable type of the port is SATA
5272 * and the port implements ->scr_read.
5278 * 0 on success, negative errno on failure.
5280 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5282 if (sata_scr_valid(ap
)) {
5283 ap
->ops
->scr_write(ap
, reg
, val
);
5290 * sata_scr_write_flush - write SCR register of the specified port and flush
5291 * @ap: ATA port to write SCR for
5292 * @reg: SCR to write
5293 * @val: value to write
5295 * This function is identical to sata_scr_write() except that this
5296 * function performs flush after writing to the register.
5302 * 0 on success, negative errno on failure.
5304 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5306 if (sata_scr_valid(ap
)) {
5307 ap
->ops
->scr_write(ap
, reg
, val
);
5308 ap
->ops
->scr_read(ap
, reg
);
5315 * ata_port_online - test whether the given port is online
5316 * @ap: ATA port to test
5318 * Test whether @ap is online. Note that this function returns 0
5319 * if online status of @ap cannot be obtained, so
5320 * ata_port_online(ap) != !ata_port_offline(ap).
5326 * 1 if the port online status is available and online.
5328 int ata_port_online(struct ata_port
*ap
)
5332 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5338 * ata_port_offline - test whether the given port is offline
5339 * @ap: ATA port to test
5341 * Test whether @ap is offline. Note that this function returns
5342 * 0 if offline status of @ap cannot be obtained, so
5343 * ata_port_online(ap) != !ata_port_offline(ap).
5349 * 1 if the port offline status is available and offline.
5351 int ata_port_offline(struct ata_port
*ap
)
5355 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5360 int ata_flush_cache(struct ata_device
*dev
)
5362 unsigned int err_mask
;
5365 if (!ata_try_flush_cache(dev
))
5368 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5369 cmd
= ATA_CMD_FLUSH_EXT
;
5371 cmd
= ATA_CMD_FLUSH
;
5373 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5375 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5383 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5384 unsigned int action
, unsigned int ehi_flags
,
5387 unsigned long flags
;
5390 for (i
= 0; i
< host
->n_ports
; i
++) {
5391 struct ata_port
*ap
= host
->ports
[i
];
5393 /* Previous resume operation might still be in
5394 * progress. Wait for PM_PENDING to clear.
5396 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5397 ata_port_wait_eh(ap
);
5398 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5401 /* request PM ops to EH */
5402 spin_lock_irqsave(ap
->lock
, flags
);
5407 ap
->pm_result
= &rc
;
5410 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5411 ap
->eh_info
.action
|= action
;
5412 ap
->eh_info
.flags
|= ehi_flags
;
5414 ata_port_schedule_eh(ap
);
5416 spin_unlock_irqrestore(ap
->lock
, flags
);
5418 /* wait and check result */
5420 ata_port_wait_eh(ap
);
5421 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5431 * ata_host_suspend - suspend host
5432 * @host: host to suspend
5435 * Suspend @host. Actual operation is performed by EH. This
5436 * function requests EH to perform PM operations and waits for EH
5440 * Kernel thread context (may sleep).
5443 * 0 on success, -errno on failure.
5445 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5449 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5453 /* EH is quiescent now. Fail if we have any ready device.
5454 * This happens if hotplug occurs between completion of device
5455 * suspension and here.
5457 for (i
= 0; i
< host
->n_ports
; i
++) {
5458 struct ata_port
*ap
= host
->ports
[i
];
5460 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5461 struct ata_device
*dev
= &ap
->device
[j
];
5463 if (ata_dev_ready(dev
)) {
5464 ata_port_printk(ap
, KERN_WARNING
,
5465 "suspend failed, device %d "
5466 "still active\n", dev
->devno
);
5473 host
->dev
->power
.power_state
= mesg
;
5477 ata_host_resume(host
);
5482 * ata_host_resume - resume host
5483 * @host: host to resume
5485 * Resume @host. Actual operation is performed by EH. This
5486 * function requests EH to perform PM operations and returns.
5487 * Note that all resume operations are performed parallely.
5490 * Kernel thread context (may sleep).
5492 void ata_host_resume(struct ata_host
*host
)
5494 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5495 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5496 host
->dev
->power
.power_state
= PMSG_ON
;
5501 * ata_port_start - Set port up for dma.
5502 * @ap: Port to initialize
5504 * Called just after data structures for each port are
5505 * initialized. Allocates space for PRD table.
5507 * May be used as the port_start() entry in ata_port_operations.
5510 * Inherited from caller.
5512 int ata_port_start(struct ata_port
*ap
)
5514 struct device
*dev
= ap
->dev
;
5517 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5522 rc
= ata_pad_alloc(ap
, dev
);
5526 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5527 (unsigned long long)ap
->prd_dma
);
5532 * ata_dev_init - Initialize an ata_device structure
5533 * @dev: Device structure to initialize
5535 * Initialize @dev in preparation for probing.
5538 * Inherited from caller.
5540 void ata_dev_init(struct ata_device
*dev
)
5542 struct ata_port
*ap
= dev
->ap
;
5543 unsigned long flags
;
5545 /* SATA spd limit is bound to the first device */
5546 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5548 /* High bits of dev->flags are used to record warm plug
5549 * requests which occur asynchronously. Synchronize using
5552 spin_lock_irqsave(ap
->lock
, flags
);
5553 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5554 spin_unlock_irqrestore(ap
->lock
, flags
);
5556 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5557 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5558 dev
->pio_mask
= UINT_MAX
;
5559 dev
->mwdma_mask
= UINT_MAX
;
5560 dev
->udma_mask
= UINT_MAX
;
5564 * ata_port_init - Initialize an ata_port structure
5565 * @ap: Structure to initialize
5566 * @host: Collection of hosts to which @ap belongs
5567 * @ent: Probe information provided by low-level driver
5568 * @port_no: Port number associated with this ata_port
5570 * Initialize a new ata_port structure.
5573 * Inherited from caller.
5575 void ata_port_init(struct ata_port
*ap
, struct ata_host
*host
,
5576 const struct ata_probe_ent
*ent
, unsigned int port_no
)
5580 ap
->lock
= &host
->lock
;
5581 ap
->flags
= ATA_FLAG_DISABLED
;
5582 ap
->print_id
= ata_print_id
++;
5583 ap
->ctl
= ATA_DEVCTL_OBS
;
5586 ap
->port_no
= port_no
;
5587 if (port_no
== 1 && ent
->pinfo2
) {
5588 ap
->pio_mask
= ent
->pinfo2
->pio_mask
;
5589 ap
->mwdma_mask
= ent
->pinfo2
->mwdma_mask
;
5590 ap
->udma_mask
= ent
->pinfo2
->udma_mask
;
5591 ap
->flags
|= ent
->pinfo2
->flags
;
5592 ap
->ops
= ent
->pinfo2
->port_ops
;
5594 ap
->pio_mask
= ent
->pio_mask
;
5595 ap
->mwdma_mask
= ent
->mwdma_mask
;
5596 ap
->udma_mask
= ent
->udma_mask
;
5597 ap
->flags
|= ent
->port_flags
;
5598 ap
->ops
= ent
->port_ops
;
5600 ap
->hw_sata_spd_limit
= UINT_MAX
;
5601 ap
->active_tag
= ATA_TAG_POISON
;
5602 ap
->last_ctl
= 0xFF;
5604 #if defined(ATA_VERBOSE_DEBUG)
5605 /* turn on all debugging levels */
5606 ap
->msg_enable
= 0x00FF;
5607 #elif defined(ATA_DEBUG)
5608 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5610 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5613 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5614 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5615 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5616 INIT_LIST_HEAD(&ap
->eh_done_q
);
5617 init_waitqueue_head(&ap
->eh_wait_q
);
5619 /* set cable type */
5620 ap
->cbl
= ATA_CBL_NONE
;
5621 if (ap
->flags
& ATA_FLAG_SATA
)
5622 ap
->cbl
= ATA_CBL_SATA
;
5624 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5625 struct ata_device
*dev
= &ap
->device
[i
];
5632 ap
->stats
.unhandled_irq
= 1;
5633 ap
->stats
.idle_irq
= 1;
5636 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
5640 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5641 * @ap: ATA port to initialize SCSI host for
5642 * @shost: SCSI host associated with @ap
5644 * Initialize SCSI host @shost associated with ATA port @ap.
5647 * Inherited from caller.
5649 static void ata_port_init_shost(struct ata_port
*ap
, struct Scsi_Host
*shost
)
5651 ap
->scsi_host
= shost
;
5653 shost
->unique_id
= ap
->print_id
;
5656 shost
->max_channel
= 1;
5657 shost
->max_cmd_len
= 16;
5661 * ata_port_add - Attach low-level ATA driver to system
5662 * @ent: Information provided by low-level driver
5663 * @host: Collections of ports to which we add
5664 * @port_no: Port number associated with this host
5666 * Attach low-level ATA driver to system.
5669 * PCI/etc. bus probe sem.
5672 * New ata_port on success, for NULL on error.
5674 static struct ata_port
* ata_port_add(const struct ata_probe_ent
*ent
,
5675 struct ata_host
*host
,
5676 unsigned int port_no
)
5678 struct Scsi_Host
*shost
;
5679 struct ata_port
*ap
;
5683 if (!ent
->port_ops
->error_handler
&&
5684 !(ent
->port_flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
))) {
5685 printk(KERN_ERR
"ata%u: no reset mechanism available\n",
5690 shost
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
5694 shost
->transportt
= &ata_scsi_transport_template
;
5696 ap
= ata_shost_to_port(shost
);
5698 ata_port_init(ap
, host
, ent
, port_no
);
5699 ata_port_init_shost(ap
, shost
);
5704 static void ata_host_release(struct device
*gendev
, void *res
)
5706 struct ata_host
*host
= dev_get_drvdata(gendev
);
5709 for (i
= 0; i
< host
->n_ports
; i
++) {
5710 struct ata_port
*ap
= host
->ports
[i
];
5712 if (ap
&& ap
->ops
->port_stop
)
5713 ap
->ops
->port_stop(ap
);
5716 if (host
->ops
->host_stop
)
5717 host
->ops
->host_stop(host
);
5719 for (i
= 0; i
< host
->n_ports
; i
++) {
5720 struct ata_port
*ap
= host
->ports
[i
];
5723 scsi_host_put(ap
->scsi_host
);
5725 host
->ports
[i
] = NULL
;
5728 dev_set_drvdata(gendev
, NULL
);
5732 * ata_sas_host_init - Initialize a host struct
5733 * @host: host to initialize
5734 * @dev: device host is attached to
5735 * @flags: host flags
5739 * PCI/etc. bus probe sem.
5743 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5744 unsigned long flags
, const struct ata_port_operations
*ops
)
5746 spin_lock_init(&host
->lock
);
5748 host
->flags
= flags
;
5753 * ata_device_add - Register hardware device with ATA and SCSI layers
5754 * @ent: Probe information describing hardware device to be registered
5756 * This function processes the information provided in the probe
5757 * information struct @ent, allocates the necessary ATA and SCSI
5758 * host information structures, initializes them, and registers
5759 * everything with requisite kernel subsystems.
5761 * This function requests irqs, probes the ATA bus, and probes
5765 * PCI/etc. bus probe sem.
5768 * Number of ports registered. Zero on error (no ports registered).
5770 int ata_device_add(const struct ata_probe_ent
*ent
)
5773 struct device
*dev
= ent
->dev
;
5774 struct ata_host
*host
;
5779 if (ent
->irq
== 0) {
5780 dev_printk(KERN_ERR
, dev
, "is not available: No interrupt assigned.\n");
5784 if (!devres_open_group(dev
, ata_device_add
, GFP_KERNEL
))
5787 /* alloc a container for our list of ATA ports (buses) */
5788 host
= devres_alloc(ata_host_release
, sizeof(struct ata_host
) +
5789 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
5792 devres_add(dev
, host
);
5793 dev_set_drvdata(dev
, host
);
5795 ata_host_init(host
, dev
, ent
->_host_flags
, ent
->port_ops
);
5796 host
->n_ports
= ent
->n_ports
;
5797 host
->irq
= ent
->irq
;
5798 host
->irq2
= ent
->irq2
;
5799 host
->iomap
= ent
->iomap
;
5800 host
->private_data
= ent
->private_data
;
5802 /* register each port bound to this device */
5803 for (i
= 0; i
< host
->n_ports
; i
++) {
5804 struct ata_port
*ap
;
5805 unsigned long xfer_mode_mask
;
5806 int irq_line
= ent
->irq
;
5808 ap
= ata_port_add(ent
, host
, i
);
5809 host
->ports
[i
] = ap
;
5814 if (ent
->dummy_port_mask
& (1 << i
)) {
5815 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5816 ap
->ops
= &ata_dummy_port_ops
;
5821 rc
= ap
->ops
->port_start(ap
);
5823 host
->ports
[i
] = NULL
;
5824 scsi_host_put(ap
->scsi_host
);
5828 /* Report the secondary IRQ for second channel legacy */
5829 if (i
== 1 && ent
->irq2
)
5830 irq_line
= ent
->irq2
;
5832 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
5833 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
5834 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
5836 /* print per-port info to dmesg */
5837 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
5838 "ctl 0x%p bmdma 0x%p irq %d\n",
5839 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
5840 ata_mode_string(xfer_mode_mask
),
5841 ap
->ioaddr
.cmd_addr
,
5842 ap
->ioaddr
.ctl_addr
,
5843 ap
->ioaddr
.bmdma_addr
,
5846 /* freeze port before requesting IRQ */
5847 ata_eh_freeze_port(ap
);
5850 /* obtain irq, that may be shared between channels */
5851 rc
= devm_request_irq(dev
, ent
->irq
, ent
->port_ops
->irq_handler
,
5852 ent
->irq_flags
, DRV_NAME
, host
);
5854 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5859 /* do we have a second IRQ for the other channel, eg legacy mode */
5861 /* We will get weird core code crashes later if this is true
5863 BUG_ON(ent
->irq
== ent
->irq2
);
5865 rc
= devm_request_irq(dev
, ent
->irq2
,
5866 ent
->port_ops
->irq_handler
, ent
->irq_flags
,
5869 dev_printk(KERN_ERR
, dev
, "irq %lu request failed: %d\n",
5875 /* resource acquisition complete */
5876 devres_remove_group(dev
, ata_device_add
);
5878 /* perform each probe synchronously */
5879 DPRINTK("probe begin\n");
5880 for (i
= 0; i
< host
->n_ports
; i
++) {
5881 struct ata_port
*ap
= host
->ports
[i
];
5885 /* init sata_spd_limit to the current value */
5886 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
5887 int spd
= (scontrol
>> 4) & 0xf;
5888 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5890 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5892 rc
= scsi_add_host(ap
->scsi_host
, dev
);
5894 ata_port_printk(ap
, KERN_ERR
, "scsi_add_host failed\n");
5895 /* FIXME: do something useful here */
5896 /* FIXME: handle unconditional calls to
5897 * scsi_scan_host and ata_host_remove, below,
5902 if (ap
->ops
->error_handler
) {
5903 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5904 unsigned long flags
;
5908 /* kick EH for boot probing */
5909 spin_lock_irqsave(ap
->lock
, flags
);
5911 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
5912 ehi
->action
|= ATA_EH_SOFTRESET
;
5913 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5915 ap
->pflags
|= ATA_PFLAG_LOADING
;
5916 ata_port_schedule_eh(ap
);
5918 spin_unlock_irqrestore(ap
->lock
, flags
);
5920 /* wait for EH to finish */
5921 ata_port_wait_eh(ap
);
5923 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5924 rc
= ata_bus_probe(ap
);
5925 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5928 /* FIXME: do something useful here?
5929 * Current libata behavior will
5930 * tear down everything when
5931 * the module is removed
5932 * or the h/w is unplugged.
5938 /* probes are done, now scan each port's disk(s) */
5939 DPRINTK("host probe begin\n");
5940 for (i
= 0; i
< host
->n_ports
; i
++) {
5941 struct ata_port
*ap
= host
->ports
[i
];
5943 ata_scsi_scan_host(ap
);
5946 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
5947 return ent
->n_ports
; /* success */
5950 devres_release_group(dev
, ata_device_add
);
5951 VPRINTK("EXIT, returning %d\n", rc
);
5956 * ata_port_detach - Detach ATA port in prepration of device removal
5957 * @ap: ATA port to be detached
5959 * Detach all ATA devices and the associated SCSI devices of @ap;
5960 * then, remove the associated SCSI host. @ap is guaranteed to
5961 * be quiescent on return from this function.
5964 * Kernel thread context (may sleep).
5966 void ata_port_detach(struct ata_port
*ap
)
5968 unsigned long flags
;
5971 if (!ap
->ops
->error_handler
)
5974 /* tell EH we're leaving & flush EH */
5975 spin_lock_irqsave(ap
->lock
, flags
);
5976 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5977 spin_unlock_irqrestore(ap
->lock
, flags
);
5979 ata_port_wait_eh(ap
);
5981 /* EH is now guaranteed to see UNLOADING, so no new device
5982 * will be attached. Disable all existing devices.
5984 spin_lock_irqsave(ap
->lock
, flags
);
5986 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
5987 ata_dev_disable(&ap
->device
[i
]);
5989 spin_unlock_irqrestore(ap
->lock
, flags
);
5991 /* Final freeze & EH. All in-flight commands are aborted. EH
5992 * will be skipped and retrials will be terminated with bad
5995 spin_lock_irqsave(ap
->lock
, flags
);
5996 ata_port_freeze(ap
); /* won't be thawed */
5997 spin_unlock_irqrestore(ap
->lock
, flags
);
5999 ata_port_wait_eh(ap
);
6001 /* Flush hotplug task. The sequence is similar to
6002 * ata_port_flush_task().
6004 flush_workqueue(ata_aux_wq
);
6005 cancel_delayed_work(&ap
->hotplug_task
);
6006 flush_workqueue(ata_aux_wq
);
6009 /* remove the associated SCSI host */
6010 scsi_remove_host(ap
->scsi_host
);
6014 * ata_host_detach - Detach all ports of an ATA host
6015 * @host: Host to detach
6017 * Detach all ports of @host.
6020 * Kernel thread context (may sleep).
6022 void ata_host_detach(struct ata_host
*host
)
6026 for (i
= 0; i
< host
->n_ports
; i
++)
6027 ata_port_detach(host
->ports
[i
]);
6030 struct ata_probe_ent
*
6031 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
6033 struct ata_probe_ent
*probe_ent
;
6035 probe_ent
= devm_kzalloc(dev
, sizeof(*probe_ent
), GFP_KERNEL
);
6037 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
6038 kobject_name(&(dev
->kobj
)));
6042 INIT_LIST_HEAD(&probe_ent
->node
);
6043 probe_ent
->dev
= dev
;
6045 probe_ent
->sht
= port
->sht
;
6046 probe_ent
->port_flags
= port
->flags
;
6047 probe_ent
->pio_mask
= port
->pio_mask
;
6048 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
6049 probe_ent
->udma_mask
= port
->udma_mask
;
6050 probe_ent
->port_ops
= port
->port_ops
;
6051 probe_ent
->private_data
= port
->private_data
;
6057 * ata_std_ports - initialize ioaddr with standard port offsets.
6058 * @ioaddr: IO address structure to be initialized
6060 * Utility function which initializes data_addr, error_addr,
6061 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6062 * device_addr, status_addr, and command_addr to standard offsets
6063 * relative to cmd_addr.
6065 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6068 void ata_std_ports(struct ata_ioports
*ioaddr
)
6070 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6071 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6072 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6073 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6074 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6075 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6076 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6077 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6078 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6079 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6086 * ata_pci_remove_one - PCI layer callback for device removal
6087 * @pdev: PCI device that was removed
6089 * PCI layer indicates to libata via this hook that hot-unplug or
6090 * module unload event has occurred. Detach all ports. Resource
6091 * release is handled via devres.
6094 * Inherited from PCI layer (may sleep).
6096 void ata_pci_remove_one(struct pci_dev
*pdev
)
6098 struct device
*dev
= pci_dev_to_dev(pdev
);
6099 struct ata_host
*host
= dev_get_drvdata(dev
);
6101 ata_host_detach(host
);
6104 /* move to PCI subsystem */
6105 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6107 unsigned long tmp
= 0;
6109 switch (bits
->width
) {
6112 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6118 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6124 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6135 return (tmp
== bits
->val
) ? 1 : 0;
6139 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6141 pci_save_state(pdev
);
6142 pci_disable_device(pdev
);
6144 if (mesg
.event
== PM_EVENT_SUSPEND
)
6145 pci_set_power_state(pdev
, PCI_D3hot
);
6148 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6152 pci_set_power_state(pdev
, PCI_D0
);
6153 pci_restore_state(pdev
);
6155 rc
= pcim_enable_device(pdev
);
6157 dev_printk(KERN_ERR
, &pdev
->dev
,
6158 "failed to enable device after resume (%d)\n", rc
);
6162 pci_set_master(pdev
);
6166 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6168 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6171 rc
= ata_host_suspend(host
, mesg
);
6175 ata_pci_device_do_suspend(pdev
, mesg
);
6180 int ata_pci_device_resume(struct pci_dev
*pdev
)
6182 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6185 rc
= ata_pci_device_do_resume(pdev
);
6187 ata_host_resume(host
);
6190 #endif /* CONFIG_PM */
6192 #endif /* CONFIG_PCI */
6195 static int __init
ata_init(void)
6197 ata_probe_timeout
*= HZ
;
6198 ata_wq
= create_workqueue("ata");
6202 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6204 destroy_workqueue(ata_wq
);
6208 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6212 static void __exit
ata_exit(void)
6214 destroy_workqueue(ata_wq
);
6215 destroy_workqueue(ata_aux_wq
);
6218 subsys_initcall(ata_init
);
6219 module_exit(ata_exit
);
6221 static unsigned long ratelimit_time
;
6222 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6224 int ata_ratelimit(void)
6227 unsigned long flags
;
6229 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6231 if (time_after(jiffies
, ratelimit_time
)) {
6233 ratelimit_time
= jiffies
+ (HZ
/5);
6237 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6243 * ata_wait_register - wait until register value changes
6244 * @reg: IO-mapped register
6245 * @mask: Mask to apply to read register value
6246 * @val: Wait condition
6247 * @interval_msec: polling interval in milliseconds
6248 * @timeout_msec: timeout in milliseconds
6250 * Waiting for some bits of register to change is a common
6251 * operation for ATA controllers. This function reads 32bit LE
6252 * IO-mapped register @reg and tests for the following condition.
6254 * (*@reg & mask) != val
6256 * If the condition is met, it returns; otherwise, the process is
6257 * repeated after @interval_msec until timeout.
6260 * Kernel thread context (may sleep)
6263 * The final register value.
6265 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6266 unsigned long interval_msec
,
6267 unsigned long timeout_msec
)
6269 unsigned long timeout
;
6272 tmp
= ioread32(reg
);
6274 /* Calculate timeout _after_ the first read to make sure
6275 * preceding writes reach the controller before starting to
6276 * eat away the timeout.
6278 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6280 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6281 msleep(interval_msec
);
6282 tmp
= ioread32(reg
);
6291 static void ata_dummy_noret(struct ata_port
*ap
) { }
6292 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6293 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6295 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6300 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6302 return AC_ERR_SYSTEM
;
6305 const struct ata_port_operations ata_dummy_port_ops
= {
6306 .port_disable
= ata_port_disable
,
6307 .check_status
= ata_dummy_check_status
,
6308 .check_altstatus
= ata_dummy_check_status
,
6309 .dev_select
= ata_noop_dev_select
,
6310 .qc_prep
= ata_noop_qc_prep
,
6311 .qc_issue
= ata_dummy_qc_issue
,
6312 .freeze
= ata_dummy_noret
,
6313 .thaw
= ata_dummy_noret
,
6314 .error_handler
= ata_dummy_noret
,
6315 .post_internal_cmd
= ata_dummy_qc_noret
,
6316 .irq_clear
= ata_dummy_noret
,
6317 .port_start
= ata_dummy_ret0
,
6318 .port_stop
= ata_dummy_noret
,
6322 * libata is essentially a library of internal helper functions for
6323 * low-level ATA host controller drivers. As such, the API/ABI is
6324 * likely to change as new drivers are added and updated.
6325 * Do not depend on ABI/API stability.
6328 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6329 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6330 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6331 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6332 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6333 EXPORT_SYMBOL_GPL(ata_std_ports
);
6334 EXPORT_SYMBOL_GPL(ata_host_init
);
6335 EXPORT_SYMBOL_GPL(ata_device_add
);
6336 EXPORT_SYMBOL_GPL(ata_host_detach
);
6337 EXPORT_SYMBOL_GPL(ata_sg_init
);
6338 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6339 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6340 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6341 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6342 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6343 EXPORT_SYMBOL_GPL(ata_tf_load
);
6344 EXPORT_SYMBOL_GPL(ata_tf_read
);
6345 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6346 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6347 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6348 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6349 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6350 EXPORT_SYMBOL_GPL(ata_check_status
);
6351 EXPORT_SYMBOL_GPL(ata_altstatus
);
6352 EXPORT_SYMBOL_GPL(ata_exec_command
);
6353 EXPORT_SYMBOL_GPL(ata_port_start
);
6354 EXPORT_SYMBOL_GPL(ata_interrupt
);
6355 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6356 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6357 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6358 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6359 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6360 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6361 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6362 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6363 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6364 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6365 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6366 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6367 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6368 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6369 EXPORT_SYMBOL_GPL(ata_port_probe
);
6370 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6371 EXPORT_SYMBOL_GPL(sata_set_spd
);
6372 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6373 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6374 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6375 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6376 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6377 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6378 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6379 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6380 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6381 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6382 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6383 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6384 EXPORT_SYMBOL_GPL(ata_port_disable
);
6385 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6386 EXPORT_SYMBOL_GPL(ata_wait_register
);
6387 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6388 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6389 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6390 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6391 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6392 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6393 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6394 EXPORT_SYMBOL_GPL(ata_host_intr
);
6395 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6396 EXPORT_SYMBOL_GPL(sata_scr_read
);
6397 EXPORT_SYMBOL_GPL(sata_scr_write
);
6398 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6399 EXPORT_SYMBOL_GPL(ata_port_online
);
6400 EXPORT_SYMBOL_GPL(ata_port_offline
);
6402 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6403 EXPORT_SYMBOL_GPL(ata_host_resume
);
6404 #endif /* CONFIG_PM */
6405 EXPORT_SYMBOL_GPL(ata_id_string
);
6406 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6407 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
6408 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6409 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6411 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6412 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6413 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6416 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6417 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
6418 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6419 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6421 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6422 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6423 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6424 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6425 #endif /* CONFIG_PM */
6426 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6427 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6428 #endif /* CONFIG_PCI */
6431 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6432 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6433 #endif /* CONFIG_PM */
6435 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6436 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6437 EXPORT_SYMBOL_GPL(ata_port_abort
);
6438 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6439 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6440 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6441 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6442 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6443 EXPORT_SYMBOL_GPL(ata_do_eh
);
6444 EXPORT_SYMBOL_GPL(ata_irq_on
);
6445 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6446 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6447 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6448 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);