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>
63 /* debounce timing parameters in msecs { interval, duration, timeout } */
64 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
65 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
66 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
68 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
69 u16 heads
, u16 sectors
);
70 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
71 static unsigned int ata_dev_set_AN(struct ata_device
*dev
, u8 enable
);
72 static void ata_dev_xfermask(struct ata_device
*dev
);
73 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
75 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)");
88 int atapi_passthru16
= 1;
89 module_param(atapi_passthru16
, int, 0444);
90 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
93 module_param_named(fua
, libata_fua
, int, 0444);
94 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
96 static int ata_ignore_hpa
= 0;
97 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
98 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
100 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
101 module_param(ata_probe_timeout
, int, 0444);
102 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
104 int libata_noacpi
= 1;
105 module_param_named(noacpi
, libata_noacpi
, int, 0444);
106 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
108 MODULE_AUTHOR("Jeff Garzik");
109 MODULE_DESCRIPTION("Library module for ATA devices");
110 MODULE_LICENSE("GPL");
111 MODULE_VERSION(DRV_VERSION
);
115 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
116 * @tf: Taskfile to convert
117 * @pmp: Port multiplier port
118 * @is_cmd: This FIS is for command
119 * @fis: Buffer into which data will output
121 * Converts a standard ATA taskfile to a Serial ATA
122 * FIS structure (Register - Host to Device).
125 * Inherited from caller.
127 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
129 fis
[0] = 0x27; /* Register - Host to Device FIS */
130 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
132 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
134 fis
[2] = tf
->command
;
135 fis
[3] = tf
->feature
;
142 fis
[8] = tf
->hob_lbal
;
143 fis
[9] = tf
->hob_lbam
;
144 fis
[10] = tf
->hob_lbah
;
145 fis
[11] = tf
->hob_feature
;
148 fis
[13] = tf
->hob_nsect
;
159 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
160 * @fis: Buffer from which data will be input
161 * @tf: Taskfile to output
163 * Converts a serial ATA FIS structure to a standard ATA taskfile.
166 * Inherited from caller.
169 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
171 tf
->command
= fis
[2]; /* status */
172 tf
->feature
= fis
[3]; /* error */
179 tf
->hob_lbal
= fis
[8];
180 tf
->hob_lbam
= fis
[9];
181 tf
->hob_lbah
= fis
[10];
184 tf
->hob_nsect
= fis
[13];
187 static const u8 ata_rw_cmds
[] = {
191 ATA_CMD_READ_MULTI_EXT
,
192 ATA_CMD_WRITE_MULTI_EXT
,
196 ATA_CMD_WRITE_MULTI_FUA_EXT
,
200 ATA_CMD_PIO_READ_EXT
,
201 ATA_CMD_PIO_WRITE_EXT
,
214 ATA_CMD_WRITE_FUA_EXT
218 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
219 * @tf: command to examine and configure
220 * @dev: device tf belongs to
222 * Examine the device configuration and tf->flags to calculate
223 * the proper read/write commands and protocol to use.
228 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
232 int index
, fua
, lba48
, write
;
234 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
235 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
236 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
238 if (dev
->flags
& ATA_DFLAG_PIO
) {
239 tf
->protocol
= ATA_PROT_PIO
;
240 index
= dev
->multi_count
? 0 : 8;
241 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
242 /* Unable to use DMA due to host limitation */
243 tf
->protocol
= ATA_PROT_PIO
;
244 index
= dev
->multi_count
? 0 : 8;
246 tf
->protocol
= ATA_PROT_DMA
;
250 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
259 * ata_tf_read_block - Read block address from ATA taskfile
260 * @tf: ATA taskfile of interest
261 * @dev: ATA device @tf belongs to
266 * Read block address from @tf. This function can handle all
267 * three address formats - LBA, LBA48 and CHS. tf->protocol and
268 * flags select the address format to use.
271 * Block address read from @tf.
273 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
277 if (tf
->flags
& ATA_TFLAG_LBA
) {
278 if (tf
->flags
& ATA_TFLAG_LBA48
) {
279 block
|= (u64
)tf
->hob_lbah
<< 40;
280 block
|= (u64
)tf
->hob_lbam
<< 32;
281 block
|= tf
->hob_lbal
<< 24;
283 block
|= (tf
->device
& 0xf) << 24;
285 block
|= tf
->lbah
<< 16;
286 block
|= tf
->lbam
<< 8;
291 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
292 head
= tf
->device
& 0xf;
295 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
302 * ata_build_rw_tf - Build ATA taskfile for given read/write request
303 * @tf: Target ATA taskfile
304 * @dev: ATA device @tf belongs to
305 * @block: Block address
306 * @n_block: Number of blocks
307 * @tf_flags: RW/FUA etc...
313 * Build ATA taskfile @tf for read/write request described by
314 * @block, @n_block, @tf_flags and @tag on @dev.
318 * 0 on success, -ERANGE if the request is too large for @dev,
319 * -EINVAL if the request is invalid.
321 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
322 u64 block
, u32 n_block
, unsigned int tf_flags
,
325 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
326 tf
->flags
|= tf_flags
;
328 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
330 if (!lba_48_ok(block
, n_block
))
333 tf
->protocol
= ATA_PROT_NCQ
;
334 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
336 if (tf
->flags
& ATA_TFLAG_WRITE
)
337 tf
->command
= ATA_CMD_FPDMA_WRITE
;
339 tf
->command
= ATA_CMD_FPDMA_READ
;
341 tf
->nsect
= tag
<< 3;
342 tf
->hob_feature
= (n_block
>> 8) & 0xff;
343 tf
->feature
= n_block
& 0xff;
345 tf
->hob_lbah
= (block
>> 40) & 0xff;
346 tf
->hob_lbam
= (block
>> 32) & 0xff;
347 tf
->hob_lbal
= (block
>> 24) & 0xff;
348 tf
->lbah
= (block
>> 16) & 0xff;
349 tf
->lbam
= (block
>> 8) & 0xff;
350 tf
->lbal
= block
& 0xff;
353 if (tf
->flags
& ATA_TFLAG_FUA
)
354 tf
->device
|= 1 << 7;
355 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
356 tf
->flags
|= ATA_TFLAG_LBA
;
358 if (lba_28_ok(block
, n_block
)) {
360 tf
->device
|= (block
>> 24) & 0xf;
361 } else if (lba_48_ok(block
, n_block
)) {
362 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
366 tf
->flags
|= ATA_TFLAG_LBA48
;
368 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
370 tf
->hob_lbah
= (block
>> 40) & 0xff;
371 tf
->hob_lbam
= (block
>> 32) & 0xff;
372 tf
->hob_lbal
= (block
>> 24) & 0xff;
374 /* request too large even for LBA48 */
377 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
380 tf
->nsect
= n_block
& 0xff;
382 tf
->lbah
= (block
>> 16) & 0xff;
383 tf
->lbam
= (block
>> 8) & 0xff;
384 tf
->lbal
= block
& 0xff;
386 tf
->device
|= ATA_LBA
;
389 u32 sect
, head
, cyl
, track
;
391 /* The request -may- be too large for CHS addressing. */
392 if (!lba_28_ok(block
, n_block
))
395 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
398 /* Convert LBA to CHS */
399 track
= (u32
)block
/ dev
->sectors
;
400 cyl
= track
/ dev
->heads
;
401 head
= track
% dev
->heads
;
402 sect
= (u32
)block
% dev
->sectors
+ 1;
404 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
405 (u32
)block
, track
, cyl
, head
, sect
);
407 /* Check whether the converted CHS can fit.
411 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
414 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
425 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
426 * @pio_mask: pio_mask
427 * @mwdma_mask: mwdma_mask
428 * @udma_mask: udma_mask
430 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
431 * unsigned int xfer_mask.
439 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
440 unsigned int mwdma_mask
,
441 unsigned int udma_mask
)
443 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
444 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
445 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
449 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
450 * @xfer_mask: xfer_mask to unpack
451 * @pio_mask: resulting pio_mask
452 * @mwdma_mask: resulting mwdma_mask
453 * @udma_mask: resulting udma_mask
455 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
456 * Any NULL distination masks will be ignored.
458 static void ata_unpack_xfermask(unsigned int xfer_mask
,
459 unsigned int *pio_mask
,
460 unsigned int *mwdma_mask
,
461 unsigned int *udma_mask
)
464 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
466 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
468 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
471 static const struct ata_xfer_ent
{
475 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
476 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
477 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
482 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
483 * @xfer_mask: xfer_mask of interest
485 * Return matching XFER_* value for @xfer_mask. Only the highest
486 * bit of @xfer_mask is considered.
492 * Matching XFER_* value, 0 if no match found.
494 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
496 int highbit
= fls(xfer_mask
) - 1;
497 const struct ata_xfer_ent
*ent
;
499 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
500 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
501 return ent
->base
+ highbit
- ent
->shift
;
506 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
507 * @xfer_mode: XFER_* of interest
509 * Return matching xfer_mask for @xfer_mode.
515 * Matching xfer_mask, 0 if no match found.
517 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
519 const struct ata_xfer_ent
*ent
;
521 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
522 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
523 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
528 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
529 * @xfer_mode: XFER_* of interest
531 * Return matching xfer_shift for @xfer_mode.
537 * Matching xfer_shift, -1 if no match found.
539 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
541 const struct ata_xfer_ent
*ent
;
543 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
544 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
550 * ata_mode_string - convert xfer_mask to string
551 * @xfer_mask: mask of bits supported; only highest bit counts.
553 * Determine string which represents the highest speed
554 * (highest bit in @modemask).
560 * Constant C string representing highest speed listed in
561 * @mode_mask, or the constant C string "<n/a>".
563 static const char *ata_mode_string(unsigned int xfer_mask
)
565 static const char * const xfer_mode_str
[] = {
589 highbit
= fls(xfer_mask
) - 1;
590 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
591 return xfer_mode_str
[highbit
];
595 static const char *sata_spd_string(unsigned int spd
)
597 static const char * const spd_str
[] = {
602 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
604 return spd_str
[spd
- 1];
607 void ata_dev_disable(struct ata_device
*dev
)
609 if (ata_dev_enabled(dev
)) {
610 if (ata_msg_drv(dev
->link
->ap
))
611 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
612 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
619 * ata_devchk - PATA device presence detection
620 * @ap: ATA channel to examine
621 * @device: Device to examine (starting at zero)
623 * This technique was originally described in
624 * Hale Landis's ATADRVR (www.ata-atapi.com), and
625 * later found its way into the ATA/ATAPI spec.
627 * Write a pattern to the ATA shadow registers,
628 * and if a device is present, it will respond by
629 * correctly storing and echoing back the
630 * ATA shadow register contents.
636 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
638 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
641 ap
->ops
->dev_select(ap
, device
);
643 iowrite8(0x55, ioaddr
->nsect_addr
);
644 iowrite8(0xaa, ioaddr
->lbal_addr
);
646 iowrite8(0xaa, ioaddr
->nsect_addr
);
647 iowrite8(0x55, ioaddr
->lbal_addr
);
649 iowrite8(0x55, ioaddr
->nsect_addr
);
650 iowrite8(0xaa, ioaddr
->lbal_addr
);
652 nsect
= ioread8(ioaddr
->nsect_addr
);
653 lbal
= ioread8(ioaddr
->lbal_addr
);
655 if ((nsect
== 0x55) && (lbal
== 0xaa))
656 return 1; /* we found a device */
658 return 0; /* nothing found */
662 * ata_dev_classify - determine device type based on ATA-spec signature
663 * @tf: ATA taskfile register set for device to be identified
665 * Determine from taskfile register contents whether a device is
666 * ATA or ATAPI, as per "Signature and persistence" section
667 * of ATA/PI spec (volume 1, sect 5.14).
673 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
674 * the event of failure.
677 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
679 /* Apple's open source Darwin code hints that some devices only
680 * put a proper signature into the LBA mid/high registers,
681 * So, we only check those. It's sufficient for uniqueness.
684 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
685 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
686 DPRINTK("found ATA device by sig\n");
690 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
691 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
692 DPRINTK("found ATAPI device by sig\n");
693 return ATA_DEV_ATAPI
;
696 DPRINTK("unknown device\n");
697 return ATA_DEV_UNKNOWN
;
701 * ata_dev_try_classify - Parse returned ATA device signature
702 * @dev: ATA device to classify (starting at zero)
703 * @present: device seems present
704 * @r_err: Value of error register on completion
706 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
707 * an ATA/ATAPI-defined set of values is placed in the ATA
708 * shadow registers, indicating the results of device detection
711 * Select the ATA device, and read the values from the ATA shadow
712 * registers. Then parse according to the Error register value,
713 * and the spec-defined values examined by ata_dev_classify().
719 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
721 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
724 struct ata_port
*ap
= dev
->link
->ap
;
725 struct ata_taskfile tf
;
729 ap
->ops
->dev_select(ap
, dev
->devno
);
731 memset(&tf
, 0, sizeof(tf
));
733 ap
->ops
->tf_read(ap
, &tf
);
738 /* see if device passed diags: if master then continue and warn later */
739 if (err
== 0 && dev
->devno
== 0)
740 /* diagnostic fail : do nothing _YET_ */
741 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
744 else if ((dev
->devno
== 0) && (err
== 0x81))
749 /* determine if device is ATA or ATAPI */
750 class = ata_dev_classify(&tf
);
752 if (class == ATA_DEV_UNKNOWN
) {
753 /* If the device failed diagnostic, it's likely to
754 * have reported incorrect device signature too.
755 * Assume ATA device if the device seems present but
756 * device signature is invalid with diagnostic
759 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
762 class = ATA_DEV_NONE
;
763 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
764 class = ATA_DEV_NONE
;
770 * ata_id_string - Convert IDENTIFY DEVICE page into string
771 * @id: IDENTIFY DEVICE results we will examine
772 * @s: string into which data is output
773 * @ofs: offset into identify device page
774 * @len: length of string to return. must be an even number.
776 * The strings in the IDENTIFY DEVICE page are broken up into
777 * 16-bit chunks. Run through the string, and output each
778 * 8-bit chunk linearly, regardless of platform.
784 void ata_id_string(const u16
*id
, unsigned char *s
,
785 unsigned int ofs
, unsigned int len
)
804 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
805 * @id: IDENTIFY DEVICE results we will examine
806 * @s: string into which data is output
807 * @ofs: offset into identify device page
808 * @len: length of string to return. must be an odd number.
810 * This function is identical to ata_id_string except that it
811 * trims trailing spaces and terminates the resulting string with
812 * null. @len must be actual maximum length (even number) + 1.
817 void ata_id_c_string(const u16
*id
, unsigned char *s
,
818 unsigned int ofs
, unsigned int len
)
824 ata_id_string(id
, s
, ofs
, len
- 1);
826 p
= s
+ strnlen(s
, len
- 1);
827 while (p
> s
&& p
[-1] == ' ')
832 static u64
ata_id_n_sectors(const u16
*id
)
834 if (ata_id_has_lba(id
)) {
835 if (ata_id_has_lba48(id
))
836 return ata_id_u64(id
, 100);
838 return ata_id_u32(id
, 60);
840 if (ata_id_current_chs_valid(id
))
841 return ata_id_u32(id
, 57);
843 return id
[1] * id
[3] * id
[6];
847 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
851 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
852 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
853 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
854 sectors
|= (tf
->lbah
& 0xff) << 16;
855 sectors
|= (tf
->lbam
& 0xff) << 8;
856 sectors
|= (tf
->lbal
& 0xff);
861 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
865 sectors
|= (tf
->device
& 0x0f) << 24;
866 sectors
|= (tf
->lbah
& 0xff) << 16;
867 sectors
|= (tf
->lbam
& 0xff) << 8;
868 sectors
|= (tf
->lbal
& 0xff);
874 * ata_read_native_max_address - Read native max address
875 * @dev: target device
876 * @max_sectors: out parameter for the result native max address
878 * Perform an LBA48 or LBA28 native size query upon the device in
882 * 0 on success, -EACCES if command is aborted by the drive.
883 * -EIO on other errors.
885 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
887 unsigned int err_mask
;
888 struct ata_taskfile tf
;
889 int lba48
= ata_id_has_lba48(dev
->id
);
891 ata_tf_init(dev
, &tf
);
893 /* always clear all address registers */
894 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
897 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
898 tf
.flags
|= ATA_TFLAG_LBA48
;
900 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
902 tf
.protocol
|= ATA_PROT_NODATA
;
903 tf
.device
|= ATA_LBA
;
905 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
907 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
908 "max address (err_mask=0x%x)\n", err_mask
);
909 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
915 *max_sectors
= ata_tf_to_lba48(&tf
);
917 *max_sectors
= ata_tf_to_lba(&tf
);
923 * ata_set_max_sectors - Set max sectors
924 * @dev: target device
925 * @new_sectors: new max sectors value to set for the device
927 * Set max sectors of @dev to @new_sectors.
930 * 0 on success, -EACCES if command is aborted or denied (due to
931 * previous non-volatile SET_MAX) by the drive. -EIO on other
934 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
936 unsigned int err_mask
;
937 struct ata_taskfile tf
;
938 int lba48
= ata_id_has_lba48(dev
->id
);
942 ata_tf_init(dev
, &tf
);
944 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
947 tf
.command
= ATA_CMD_SET_MAX_EXT
;
948 tf
.flags
|= ATA_TFLAG_LBA48
;
950 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
951 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
952 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
954 tf
.command
= ATA_CMD_SET_MAX
;
956 tf
.device
|= (new_sectors
>> 24) & 0xf;
959 tf
.protocol
|= ATA_PROT_NODATA
;
960 tf
.device
|= ATA_LBA
;
962 tf
.lbal
= (new_sectors
>> 0) & 0xff;
963 tf
.lbam
= (new_sectors
>> 8) & 0xff;
964 tf
.lbah
= (new_sectors
>> 16) & 0xff;
966 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
968 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
969 "max address (err_mask=0x%x)\n", err_mask
);
970 if (err_mask
== AC_ERR_DEV
&&
971 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
980 * ata_hpa_resize - Resize a device with an HPA set
981 * @dev: Device to resize
983 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
984 * it if required to the full size of the media. The caller must check
985 * the drive has the HPA feature set enabled.
988 * 0 on success, -errno on failure.
990 static int ata_hpa_resize(struct ata_device
*dev
)
992 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
993 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
994 u64 sectors
= ata_id_n_sectors(dev
->id
);
998 /* do we need to do it? */
999 if (dev
->class != ATA_DEV_ATA
||
1000 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1001 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1004 /* read native max address */
1005 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1007 /* If HPA isn't going to be unlocked, skip HPA
1008 * resizing from the next try.
1010 if (!ata_ignore_hpa
) {
1011 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1012 "broken, will skip HPA handling\n");
1013 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1015 /* we can continue if device aborted the command */
1023 /* nothing to do? */
1024 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1025 if (!print_info
|| native_sectors
== sectors
)
1028 if (native_sectors
> sectors
)
1029 ata_dev_printk(dev
, KERN_INFO
,
1030 "HPA detected: current %llu, native %llu\n",
1031 (unsigned long long)sectors
,
1032 (unsigned long long)native_sectors
);
1033 else if (native_sectors
< sectors
)
1034 ata_dev_printk(dev
, KERN_WARNING
,
1035 "native sectors (%llu) is smaller than "
1037 (unsigned long long)native_sectors
,
1038 (unsigned long long)sectors
);
1042 /* let's unlock HPA */
1043 rc
= ata_set_max_sectors(dev
, native_sectors
);
1044 if (rc
== -EACCES
) {
1045 /* if device aborted the command, skip HPA resizing */
1046 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1047 "(%llu -> %llu), skipping HPA handling\n",
1048 (unsigned long long)sectors
,
1049 (unsigned long long)native_sectors
);
1050 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1055 /* re-read IDENTIFY data */
1056 rc
= ata_dev_reread_id(dev
, 0);
1058 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1059 "data after HPA resizing\n");
1064 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1065 ata_dev_printk(dev
, KERN_INFO
,
1066 "HPA unlocked: %llu -> %llu, native %llu\n",
1067 (unsigned long long)sectors
,
1068 (unsigned long long)new_sectors
,
1069 (unsigned long long)native_sectors
);
1076 * ata_id_to_dma_mode - Identify DMA mode from id block
1077 * @dev: device to identify
1078 * @unknown: mode to assume if we cannot tell
1080 * Set up the timing values for the device based upon the identify
1081 * reported values for the DMA mode. This function is used by drivers
1082 * which rely upon firmware configured modes, but wish to report the
1083 * mode correctly when possible.
1085 * In addition we emit similarly formatted messages to the default
1086 * ata_dev_set_mode handler, in order to provide consistency of
1090 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1095 /* Pack the DMA modes */
1096 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1097 if (dev
->id
[53] & 0x04)
1098 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1100 /* Select the mode in use */
1101 mode
= ata_xfer_mask2mode(mask
);
1104 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1105 ata_mode_string(mask
));
1107 /* SWDMA perhaps ? */
1109 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1112 /* Configure the device reporting */
1113 dev
->xfer_mode
= mode
;
1114 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1118 * ata_noop_dev_select - Select device 0/1 on ATA bus
1119 * @ap: ATA channel to manipulate
1120 * @device: ATA device (numbered from zero) to select
1122 * This function performs no actual function.
1124 * May be used as the dev_select() entry in ata_port_operations.
1129 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1135 * ata_std_dev_select - Select device 0/1 on ATA bus
1136 * @ap: ATA channel to manipulate
1137 * @device: ATA device (numbered from zero) to select
1139 * Use the method defined in the ATA specification to
1140 * make either device 0, or device 1, active on the
1141 * ATA channel. Works with both PIO and MMIO.
1143 * May be used as the dev_select() entry in ata_port_operations.
1149 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1154 tmp
= ATA_DEVICE_OBS
;
1156 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1158 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1159 ata_pause(ap
); /* needed; also flushes, for mmio */
1163 * ata_dev_select - Select device 0/1 on ATA bus
1164 * @ap: ATA channel to manipulate
1165 * @device: ATA device (numbered from zero) to select
1166 * @wait: non-zero to wait for Status register BSY bit to clear
1167 * @can_sleep: non-zero if context allows sleeping
1169 * Use the method defined in the ATA specification to
1170 * make either device 0, or device 1, active on the
1173 * This is a high-level version of ata_std_dev_select(),
1174 * which additionally provides the services of inserting
1175 * the proper pauses and status polling, where needed.
1181 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1182 unsigned int wait
, unsigned int can_sleep
)
1184 if (ata_msg_probe(ap
))
1185 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1186 "device %u, wait %u\n", device
, wait
);
1191 ap
->ops
->dev_select(ap
, device
);
1194 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1201 * ata_dump_id - IDENTIFY DEVICE info debugging output
1202 * @id: IDENTIFY DEVICE page to dump
1204 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1211 static inline void ata_dump_id(const u16
*id
)
1213 DPRINTK("49==0x%04x "
1223 DPRINTK("80==0x%04x "
1233 DPRINTK("88==0x%04x "
1240 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1241 * @id: IDENTIFY data to compute xfer mask from
1243 * Compute the xfermask for this device. This is not as trivial
1244 * as it seems if we must consider early devices correctly.
1246 * FIXME: pre IDE drive timing (do we care ?).
1254 static unsigned int ata_id_xfermask(const u16
*id
)
1256 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1258 /* Usual case. Word 53 indicates word 64 is valid */
1259 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1260 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1264 /* If word 64 isn't valid then Word 51 high byte holds
1265 * the PIO timing number for the maximum. Turn it into
1268 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1269 if (mode
< 5) /* Valid PIO range */
1270 pio_mask
= (2 << mode
) - 1;
1274 /* But wait.. there's more. Design your standards by
1275 * committee and you too can get a free iordy field to
1276 * process. However its the speeds not the modes that
1277 * are supported... Note drivers using the timing API
1278 * will get this right anyway
1282 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1284 if (ata_id_is_cfa(id
)) {
1286 * Process compact flash extended modes
1288 int pio
= id
[163] & 0x7;
1289 int dma
= (id
[163] >> 3) & 7;
1292 pio_mask
|= (1 << 5);
1294 pio_mask
|= (1 << 6);
1296 mwdma_mask
|= (1 << 3);
1298 mwdma_mask
|= (1 << 4);
1302 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1303 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1305 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1309 * ata_port_queue_task - Queue port_task
1310 * @ap: The ata_port to queue port_task for
1311 * @fn: workqueue function to be scheduled
1312 * @data: data for @fn to use
1313 * @delay: delay time for workqueue function
1315 * Schedule @fn(@data) for execution after @delay jiffies using
1316 * port_task. There is one port_task per port and it's the
1317 * user(low level driver)'s responsibility to make sure that only
1318 * one task is active at any given time.
1320 * libata core layer takes care of synchronization between
1321 * port_task and EH. ata_port_queue_task() may be ignored for EH
1325 * Inherited from caller.
1327 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1328 unsigned long delay
)
1330 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1331 ap
->port_task_data
= data
;
1333 /* may fail if ata_port_flush_task() in progress */
1334 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1338 * ata_port_flush_task - Flush port_task
1339 * @ap: The ata_port to flush port_task for
1341 * After this function completes, port_task is guranteed not to
1342 * be running or scheduled.
1345 * Kernel thread context (may sleep)
1347 void ata_port_flush_task(struct ata_port
*ap
)
1351 cancel_rearming_delayed_work(&ap
->port_task
);
1353 if (ata_msg_ctl(ap
))
1354 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1357 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1359 struct completion
*waiting
= qc
->private_data
;
1365 * ata_exec_internal_sg - execute libata internal command
1366 * @dev: Device to which the command is sent
1367 * @tf: Taskfile registers for the command and the result
1368 * @cdb: CDB for packet command
1369 * @dma_dir: Data tranfer direction of the command
1370 * @sg: sg list for the data buffer of the command
1371 * @n_elem: Number of sg entries
1373 * Executes libata internal command with timeout. @tf contains
1374 * command on entry and result on return. Timeout and error
1375 * conditions are reported via return value. No recovery action
1376 * is taken after a command times out. It's caller's duty to
1377 * clean up after timeout.
1380 * None. Should be called with kernel context, might sleep.
1383 * Zero on success, AC_ERR_* mask on failure
1385 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1386 struct ata_taskfile
*tf
, const u8
*cdb
,
1387 int dma_dir
, struct scatterlist
*sg
,
1388 unsigned int n_elem
)
1390 struct ata_link
*link
= dev
->link
;
1391 struct ata_port
*ap
= link
->ap
;
1392 u8 command
= tf
->command
;
1393 struct ata_queued_cmd
*qc
;
1394 unsigned int tag
, preempted_tag
;
1395 u32 preempted_sactive
, preempted_qc_active
;
1396 int preempted_nr_active_links
;
1397 DECLARE_COMPLETION_ONSTACK(wait
);
1398 unsigned long flags
;
1399 unsigned int err_mask
;
1402 spin_lock_irqsave(ap
->lock
, flags
);
1404 /* no internal command while frozen */
1405 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1406 spin_unlock_irqrestore(ap
->lock
, flags
);
1407 return AC_ERR_SYSTEM
;
1410 /* initialize internal qc */
1412 /* XXX: Tag 0 is used for drivers with legacy EH as some
1413 * drivers choke if any other tag is given. This breaks
1414 * ata_tag_internal() test for those drivers. Don't use new
1415 * EH stuff without converting to it.
1417 if (ap
->ops
->error_handler
)
1418 tag
= ATA_TAG_INTERNAL
;
1422 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1424 qc
= __ata_qc_from_tag(ap
, tag
);
1432 preempted_tag
= link
->active_tag
;
1433 preempted_sactive
= link
->sactive
;
1434 preempted_qc_active
= ap
->qc_active
;
1435 preempted_nr_active_links
= ap
->nr_active_links
;
1436 link
->active_tag
= ATA_TAG_POISON
;
1439 ap
->nr_active_links
= 0;
1441 /* prepare & issue qc */
1444 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1445 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1446 qc
->dma_dir
= dma_dir
;
1447 if (dma_dir
!= DMA_NONE
) {
1448 unsigned int i
, buflen
= 0;
1450 for (i
= 0; i
< n_elem
; i
++)
1451 buflen
+= sg
[i
].length
;
1453 ata_sg_init(qc
, sg
, n_elem
);
1454 qc
->nbytes
= buflen
;
1457 qc
->private_data
= &wait
;
1458 qc
->complete_fn
= ata_qc_complete_internal
;
1462 spin_unlock_irqrestore(ap
->lock
, flags
);
1464 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1466 ata_port_flush_task(ap
);
1469 spin_lock_irqsave(ap
->lock
, flags
);
1471 /* We're racing with irq here. If we lose, the
1472 * following test prevents us from completing the qc
1473 * twice. If we win, the port is frozen and will be
1474 * cleaned up by ->post_internal_cmd().
1476 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1477 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1479 if (ap
->ops
->error_handler
)
1480 ata_port_freeze(ap
);
1482 ata_qc_complete(qc
);
1484 if (ata_msg_warn(ap
))
1485 ata_dev_printk(dev
, KERN_WARNING
,
1486 "qc timeout (cmd 0x%x)\n", command
);
1489 spin_unlock_irqrestore(ap
->lock
, flags
);
1492 /* do post_internal_cmd */
1493 if (ap
->ops
->post_internal_cmd
)
1494 ap
->ops
->post_internal_cmd(qc
);
1496 /* perform minimal error analysis */
1497 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1498 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1499 qc
->err_mask
|= AC_ERR_DEV
;
1502 qc
->err_mask
|= AC_ERR_OTHER
;
1504 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1505 qc
->err_mask
&= ~AC_ERR_OTHER
;
1509 spin_lock_irqsave(ap
->lock
, flags
);
1511 *tf
= qc
->result_tf
;
1512 err_mask
= qc
->err_mask
;
1515 link
->active_tag
= preempted_tag
;
1516 link
->sactive
= preempted_sactive
;
1517 ap
->qc_active
= preempted_qc_active
;
1518 ap
->nr_active_links
= preempted_nr_active_links
;
1520 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1521 * Until those drivers are fixed, we detect the condition
1522 * here, fail the command with AC_ERR_SYSTEM and reenable the
1525 * Note that this doesn't change any behavior as internal
1526 * command failure results in disabling the device in the
1527 * higher layer for LLDDs without new reset/EH callbacks.
1529 * Kill the following code as soon as those drivers are fixed.
1531 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1532 err_mask
|= AC_ERR_SYSTEM
;
1536 spin_unlock_irqrestore(ap
->lock
, flags
);
1542 * ata_exec_internal - execute libata internal command
1543 * @dev: Device to which the command is sent
1544 * @tf: Taskfile registers for the command and the result
1545 * @cdb: CDB for packet command
1546 * @dma_dir: Data tranfer direction of the command
1547 * @buf: Data buffer of the command
1548 * @buflen: Length of data buffer
1550 * Wrapper around ata_exec_internal_sg() which takes simple
1551 * buffer instead of sg list.
1554 * None. Should be called with kernel context, might sleep.
1557 * Zero on success, AC_ERR_* mask on failure
1559 unsigned ata_exec_internal(struct ata_device
*dev
,
1560 struct ata_taskfile
*tf
, const u8
*cdb
,
1561 int dma_dir
, void *buf
, unsigned int buflen
)
1563 struct scatterlist
*psg
= NULL
, sg
;
1564 unsigned int n_elem
= 0;
1566 if (dma_dir
!= DMA_NONE
) {
1568 sg_init_one(&sg
, buf
, buflen
);
1573 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1577 * ata_do_simple_cmd - execute simple internal command
1578 * @dev: Device to which the command is sent
1579 * @cmd: Opcode to execute
1581 * Execute a 'simple' command, that only consists of the opcode
1582 * 'cmd' itself, without filling any other registers
1585 * Kernel thread context (may sleep).
1588 * Zero on success, AC_ERR_* mask on failure
1590 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1592 struct ata_taskfile tf
;
1594 ata_tf_init(dev
, &tf
);
1597 tf
.flags
|= ATA_TFLAG_DEVICE
;
1598 tf
.protocol
= ATA_PROT_NODATA
;
1600 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1604 * ata_pio_need_iordy - check if iordy needed
1607 * Check if the current speed of the device requires IORDY. Used
1608 * by various controllers for chip configuration.
1611 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1613 /* Controller doesn't support IORDY. Probably a pointless check
1614 as the caller should know this */
1615 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1617 /* PIO3 and higher it is mandatory */
1618 if (adev
->pio_mode
> XFER_PIO_2
)
1620 /* We turn it on when possible */
1621 if (ata_id_has_iordy(adev
->id
))
1627 * ata_pio_mask_no_iordy - Return the non IORDY mask
1630 * Compute the highest mode possible if we are not using iordy. Return
1631 * -1 if no iordy mode is available.
1634 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1636 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1637 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1638 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1639 /* Is the speed faster than the drive allows non IORDY ? */
1641 /* This is cycle times not frequency - watch the logic! */
1642 if (pio
> 240) /* PIO2 is 240nS per cycle */
1643 return 3 << ATA_SHIFT_PIO
;
1644 return 7 << ATA_SHIFT_PIO
;
1647 return 3 << ATA_SHIFT_PIO
;
1651 * ata_dev_read_id - Read ID data from the specified device
1652 * @dev: target device
1653 * @p_class: pointer to class of the target device (may be changed)
1654 * @flags: ATA_READID_* flags
1655 * @id: buffer to read IDENTIFY data into
1657 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1658 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1659 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1660 * for pre-ATA4 drives.
1662 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1663 * now we abort if we hit that case.
1666 * Kernel thread context (may sleep)
1669 * 0 on success, -errno otherwise.
1671 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1672 unsigned int flags
, u16
*id
)
1674 struct ata_port
*ap
= dev
->link
->ap
;
1675 unsigned int class = *p_class
;
1676 struct ata_taskfile tf
;
1677 unsigned int err_mask
= 0;
1679 int may_fallback
= 1, tried_spinup
= 0;
1682 if (ata_msg_ctl(ap
))
1683 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1685 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1687 ata_tf_init(dev
, &tf
);
1691 tf
.command
= ATA_CMD_ID_ATA
;
1694 tf
.command
= ATA_CMD_ID_ATAPI
;
1698 reason
= "unsupported class";
1702 tf
.protocol
= ATA_PROT_PIO
;
1704 /* Some devices choke if TF registers contain garbage. Make
1705 * sure those are properly initialized.
1707 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1709 /* Device presence detection is unreliable on some
1710 * controllers. Always poll IDENTIFY if available.
1712 tf
.flags
|= ATA_TFLAG_POLLING
;
1714 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1715 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1717 if (err_mask
& AC_ERR_NODEV_HINT
) {
1718 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1719 ap
->print_id
, dev
->devno
);
1723 /* Device or controller might have reported the wrong
1724 * device class. Give a shot at the other IDENTIFY if
1725 * the current one is aborted by the device.
1728 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1731 if (class == ATA_DEV_ATA
)
1732 class = ATA_DEV_ATAPI
;
1734 class = ATA_DEV_ATA
;
1739 reason
= "I/O error";
1743 /* Falling back doesn't make sense if ID data was read
1744 * successfully at least once.
1748 swap_buf_le16(id
, ATA_ID_WORDS
);
1752 reason
= "device reports invalid type";
1754 if (class == ATA_DEV_ATA
) {
1755 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1758 if (ata_id_is_ata(id
))
1762 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1765 * Drive powered-up in standby mode, and requires a specific
1766 * SET_FEATURES spin-up subcommand before it will accept
1767 * anything other than the original IDENTIFY command.
1769 ata_tf_init(dev
, &tf
);
1770 tf
.command
= ATA_CMD_SET_FEATURES
;
1771 tf
.feature
= SETFEATURES_SPINUP
;
1772 tf
.protocol
= ATA_PROT_NODATA
;
1773 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1774 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1775 if (err_mask
&& id
[2] != 0x738c) {
1777 reason
= "SPINUP failed";
1781 * If the drive initially returned incomplete IDENTIFY info,
1782 * we now must reissue the IDENTIFY command.
1784 if (id
[2] == 0x37c8)
1788 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1790 * The exact sequence expected by certain pre-ATA4 drives is:
1792 * IDENTIFY (optional in early ATA)
1793 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1795 * Some drives were very specific about that exact sequence.
1797 * Note that ATA4 says lba is mandatory so the second check
1798 * shoud never trigger.
1800 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1801 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1804 reason
= "INIT_DEV_PARAMS failed";
1808 /* current CHS translation info (id[53-58]) might be
1809 * changed. reread the identify device info.
1811 flags
&= ~ATA_READID_POSTRESET
;
1821 if (ata_msg_warn(ap
))
1822 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1823 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1827 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1829 struct ata_port
*ap
= dev
->link
->ap
;
1830 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1833 static void ata_dev_config_ncq(struct ata_device
*dev
,
1834 char *desc
, size_t desc_sz
)
1836 struct ata_port
*ap
= dev
->link
->ap
;
1837 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1839 if (!ata_id_has_ncq(dev
->id
)) {
1843 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1844 snprintf(desc
, desc_sz
, "NCQ (not used)");
1847 if (ap
->flags
& ATA_FLAG_NCQ
) {
1848 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1849 dev
->flags
|= ATA_DFLAG_NCQ
;
1852 if (hdepth
>= ddepth
)
1853 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1855 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1859 * ata_dev_configure - Configure the specified ATA/ATAPI device
1860 * @dev: Target device to configure
1862 * Configure @dev according to @dev->id. Generic and low-level
1863 * driver specific fixups are also applied.
1866 * Kernel thread context (may sleep)
1869 * 0 on success, -errno otherwise
1871 int ata_dev_configure(struct ata_device
*dev
)
1873 struct ata_port
*ap
= dev
->link
->ap
;
1874 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1875 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1876 const u16
*id
= dev
->id
;
1877 unsigned int xfer_mask
;
1878 char revbuf
[7]; /* XYZ-99\0 */
1879 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1880 char modelbuf
[ATA_ID_PROD_LEN
+1];
1883 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1884 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1889 if (ata_msg_probe(ap
))
1890 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1893 dev
->horkage
|= ata_dev_blacklisted(dev
);
1895 /* let ACPI work its magic */
1896 rc
= ata_acpi_on_devcfg(dev
);
1900 /* massage HPA, do it early as it might change IDENTIFY data */
1901 rc
= ata_hpa_resize(dev
);
1905 /* print device capabilities */
1906 if (ata_msg_probe(ap
))
1907 ata_dev_printk(dev
, KERN_DEBUG
,
1908 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1909 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1911 id
[49], id
[82], id
[83], id
[84],
1912 id
[85], id
[86], id
[87], id
[88]);
1914 /* initialize to-be-configured parameters */
1915 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1916 dev
->max_sectors
= 0;
1924 * common ATA, ATAPI feature tests
1927 /* find max transfer mode; for printk only */
1928 xfer_mask
= ata_id_xfermask(id
);
1930 if (ata_msg_probe(ap
))
1933 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1934 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1937 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1940 /* ATA-specific feature tests */
1941 if (dev
->class == ATA_DEV_ATA
) {
1942 if (ata_id_is_cfa(id
)) {
1943 if (id
[162] & 1) /* CPRM may make this media unusable */
1944 ata_dev_printk(dev
, KERN_WARNING
,
1945 "supports DRM functions and may "
1946 "not be fully accessable.\n");
1947 snprintf(revbuf
, 7, "CFA");
1950 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1952 dev
->n_sectors
= ata_id_n_sectors(id
);
1954 if (dev
->id
[59] & 0x100)
1955 dev
->multi_count
= dev
->id
[59] & 0xff;
1957 if (ata_id_has_lba(id
)) {
1958 const char *lba_desc
;
1962 dev
->flags
|= ATA_DFLAG_LBA
;
1963 if (ata_id_has_lba48(id
)) {
1964 dev
->flags
|= ATA_DFLAG_LBA48
;
1967 if (dev
->n_sectors
>= (1UL << 28) &&
1968 ata_id_has_flush_ext(id
))
1969 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1973 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1975 /* print device info to dmesg */
1976 if (ata_msg_drv(ap
) && print_info
) {
1977 ata_dev_printk(dev
, KERN_INFO
,
1978 "%s: %s, %s, max %s\n",
1979 revbuf
, modelbuf
, fwrevbuf
,
1980 ata_mode_string(xfer_mask
));
1981 ata_dev_printk(dev
, KERN_INFO
,
1982 "%Lu sectors, multi %u: %s %s\n",
1983 (unsigned long long)dev
->n_sectors
,
1984 dev
->multi_count
, lba_desc
, ncq_desc
);
1989 /* Default translation */
1990 dev
->cylinders
= id
[1];
1992 dev
->sectors
= id
[6];
1994 if (ata_id_current_chs_valid(id
)) {
1995 /* Current CHS translation is valid. */
1996 dev
->cylinders
= id
[54];
1997 dev
->heads
= id
[55];
1998 dev
->sectors
= id
[56];
2001 /* print device info to dmesg */
2002 if (ata_msg_drv(ap
) && print_info
) {
2003 ata_dev_printk(dev
, KERN_INFO
,
2004 "%s: %s, %s, max %s\n",
2005 revbuf
, modelbuf
, fwrevbuf
,
2006 ata_mode_string(xfer_mask
));
2007 ata_dev_printk(dev
, KERN_INFO
,
2008 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2009 (unsigned long long)dev
->n_sectors
,
2010 dev
->multi_count
, dev
->cylinders
,
2011 dev
->heads
, dev
->sectors
);
2018 /* ATAPI-specific feature tests */
2019 else if (dev
->class == ATA_DEV_ATAPI
) {
2020 const char *cdb_intr_string
= "";
2021 const char *atapi_an_string
= "";
2024 rc
= atapi_cdb_len(id
);
2025 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2026 if (ata_msg_warn(ap
))
2027 ata_dev_printk(dev
, KERN_WARNING
,
2028 "unsupported CDB len\n");
2032 dev
->cdb_len
= (unsigned int) rc
;
2034 /* Enable ATAPI AN if both the host and device have
2035 * the support. If PMP is attached, SNTF is required
2036 * to enable ATAPI AN to discern between PHY status
2037 * changed notifications and ATAPI ANs.
2039 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2040 (!ap
->nr_pmp_links
||
2041 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2042 unsigned int err_mask
;
2044 /* issue SET feature command to turn this on */
2045 err_mask
= ata_dev_set_AN(dev
, SETFEATURES_SATA_ENABLE
);
2047 ata_dev_printk(dev
, KERN_ERR
,
2048 "failed to enable ATAPI AN "
2049 "(err_mask=0x%x)\n", err_mask
);
2051 dev
->flags
|= ATA_DFLAG_AN
;
2052 atapi_an_string
= ", ATAPI AN";
2056 if (ata_id_cdb_intr(dev
->id
)) {
2057 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2058 cdb_intr_string
= ", CDB intr";
2061 /* print device info to dmesg */
2062 if (ata_msg_drv(ap
) && print_info
)
2063 ata_dev_printk(dev
, KERN_INFO
,
2064 "ATAPI: %s, %s, max %s%s%s\n",
2066 ata_mode_string(xfer_mask
),
2067 cdb_intr_string
, atapi_an_string
);
2070 /* determine max_sectors */
2071 dev
->max_sectors
= ATA_MAX_SECTORS
;
2072 if (dev
->flags
& ATA_DFLAG_LBA48
)
2073 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2075 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2076 /* Let the user know. We don't want to disallow opens for
2077 rescue purposes, or in case the vendor is just a blithering
2080 ata_dev_printk(dev
, KERN_WARNING
,
2081 "Drive reports diagnostics failure. This may indicate a drive\n");
2082 ata_dev_printk(dev
, KERN_WARNING
,
2083 "fault or invalid emulation. Contact drive vendor for information.\n");
2087 /* limit bridge transfers to udma5, 200 sectors */
2088 if (ata_dev_knobble(dev
)) {
2089 if (ata_msg_drv(ap
) && print_info
)
2090 ata_dev_printk(dev
, KERN_INFO
,
2091 "applying bridge limits\n");
2092 dev
->udma_mask
&= ATA_UDMA5
;
2093 dev
->max_sectors
= ATA_MAX_SECTORS
;
2096 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2097 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2100 if (ap
->ops
->dev_config
)
2101 ap
->ops
->dev_config(dev
);
2103 if (ata_msg_probe(ap
))
2104 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2105 __FUNCTION__
, ata_chk_status(ap
));
2109 if (ata_msg_probe(ap
))
2110 ata_dev_printk(dev
, KERN_DEBUG
,
2111 "%s: EXIT, err\n", __FUNCTION__
);
2116 * ata_cable_40wire - return 40 wire cable type
2119 * Helper method for drivers which want to hardwire 40 wire cable
2123 int ata_cable_40wire(struct ata_port
*ap
)
2125 return ATA_CBL_PATA40
;
2129 * ata_cable_80wire - return 80 wire cable type
2132 * Helper method for drivers which want to hardwire 80 wire cable
2136 int ata_cable_80wire(struct ata_port
*ap
)
2138 return ATA_CBL_PATA80
;
2142 * ata_cable_unknown - return unknown PATA cable.
2145 * Helper method for drivers which have no PATA cable detection.
2148 int ata_cable_unknown(struct ata_port
*ap
)
2150 return ATA_CBL_PATA_UNK
;
2154 * ata_cable_sata - return SATA cable type
2157 * Helper method for drivers which have SATA cables
2160 int ata_cable_sata(struct ata_port
*ap
)
2162 return ATA_CBL_SATA
;
2166 * ata_bus_probe - Reset and probe ATA bus
2169 * Master ATA bus probing function. Initiates a hardware-dependent
2170 * bus reset, then attempts to identify any devices found on
2174 * PCI/etc. bus probe sem.
2177 * Zero on success, negative errno otherwise.
2180 int ata_bus_probe(struct ata_port
*ap
)
2182 unsigned int classes
[ATA_MAX_DEVICES
];
2183 int tries
[ATA_MAX_DEVICES
];
2185 struct ata_device
*dev
;
2189 ata_link_for_each_dev(dev
, &ap
->link
)
2190 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2193 /* reset and determine device classes */
2194 ap
->ops
->phy_reset(ap
);
2196 ata_link_for_each_dev(dev
, &ap
->link
) {
2197 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2198 dev
->class != ATA_DEV_UNKNOWN
)
2199 classes
[dev
->devno
] = dev
->class;
2201 classes
[dev
->devno
] = ATA_DEV_NONE
;
2203 dev
->class = ATA_DEV_UNKNOWN
;
2208 /* after the reset the device state is PIO 0 and the controller
2209 state is undefined. Record the mode */
2211 ata_link_for_each_dev(dev
, &ap
->link
)
2212 dev
->pio_mode
= XFER_PIO_0
;
2214 /* read IDENTIFY page and configure devices. We have to do the identify
2215 specific sequence bass-ackwards so that PDIAG- is released by
2218 ata_link_for_each_dev(dev
, &ap
->link
) {
2219 if (tries
[dev
->devno
])
2220 dev
->class = classes
[dev
->devno
];
2222 if (!ata_dev_enabled(dev
))
2225 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2231 /* Now ask for the cable type as PDIAG- should have been released */
2232 if (ap
->ops
->cable_detect
)
2233 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2235 /* We may have SATA bridge glue hiding here irrespective of the
2236 reported cable types and sensed types */
2237 ata_link_for_each_dev(dev
, &ap
->link
) {
2238 if (!ata_dev_enabled(dev
))
2240 /* SATA drives indicate we have a bridge. We don't know which
2241 end of the link the bridge is which is a problem */
2242 if (ata_id_is_sata(dev
->id
))
2243 ap
->cbl
= ATA_CBL_SATA
;
2246 /* After the identify sequence we can now set up the devices. We do
2247 this in the normal order so that the user doesn't get confused */
2249 ata_link_for_each_dev(dev
, &ap
->link
) {
2250 if (!ata_dev_enabled(dev
))
2253 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2254 rc
= ata_dev_configure(dev
);
2255 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2260 /* configure transfer mode */
2261 rc
= ata_set_mode(&ap
->link
, &dev
);
2265 ata_link_for_each_dev(dev
, &ap
->link
)
2266 if (ata_dev_enabled(dev
))
2269 /* no device present, disable port */
2270 ata_port_disable(ap
);
2274 tries
[dev
->devno
]--;
2278 /* eeek, something went very wrong, give up */
2279 tries
[dev
->devno
] = 0;
2283 /* give it just one more chance */
2284 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2286 if (tries
[dev
->devno
] == 1) {
2287 /* This is the last chance, better to slow
2288 * down than lose it.
2290 sata_down_spd_limit(&ap
->link
);
2291 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2295 if (!tries
[dev
->devno
])
2296 ata_dev_disable(dev
);
2302 * ata_port_probe - Mark port as enabled
2303 * @ap: Port for which we indicate enablement
2305 * Modify @ap data structure such that the system
2306 * thinks that the entire port is enabled.
2308 * LOCKING: host lock, or some other form of
2312 void ata_port_probe(struct ata_port
*ap
)
2314 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2318 * sata_print_link_status - Print SATA link status
2319 * @link: SATA link to printk link status about
2321 * This function prints link speed and status of a SATA link.
2326 void sata_print_link_status(struct ata_link
*link
)
2328 u32 sstatus
, scontrol
, tmp
;
2330 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2332 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2334 if (ata_link_online(link
)) {
2335 tmp
= (sstatus
>> 4) & 0xf;
2336 ata_link_printk(link
, KERN_INFO
,
2337 "SATA link up %s (SStatus %X SControl %X)\n",
2338 sata_spd_string(tmp
), sstatus
, scontrol
);
2340 ata_link_printk(link
, KERN_INFO
,
2341 "SATA link down (SStatus %X SControl %X)\n",
2347 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2348 * @ap: SATA port associated with target SATA PHY.
2350 * This function issues commands to standard SATA Sxxx
2351 * PHY registers, to wake up the phy (and device), and
2352 * clear any reset condition.
2355 * PCI/etc. bus probe sem.
2358 void __sata_phy_reset(struct ata_port
*ap
)
2360 struct ata_link
*link
= &ap
->link
;
2361 unsigned long timeout
= jiffies
+ (HZ
* 5);
2364 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2365 /* issue phy wake/reset */
2366 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2367 /* Couldn't find anything in SATA I/II specs, but
2368 * AHCI-1.1 10.4.2 says at least 1 ms. */
2371 /* phy wake/clear reset */
2372 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2374 /* wait for phy to become ready, if necessary */
2377 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2378 if ((sstatus
& 0xf) != 1)
2380 } while (time_before(jiffies
, timeout
));
2382 /* print link status */
2383 sata_print_link_status(link
);
2385 /* TODO: phy layer with polling, timeouts, etc. */
2386 if (!ata_link_offline(link
))
2389 ata_port_disable(ap
);
2391 if (ap
->flags
& ATA_FLAG_DISABLED
)
2394 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2395 ata_port_disable(ap
);
2399 ap
->cbl
= ATA_CBL_SATA
;
2403 * sata_phy_reset - Reset SATA bus.
2404 * @ap: SATA port associated with target SATA PHY.
2406 * This function resets the SATA bus, and then probes
2407 * the bus for devices.
2410 * PCI/etc. bus probe sem.
2413 void sata_phy_reset(struct ata_port
*ap
)
2415 __sata_phy_reset(ap
);
2416 if (ap
->flags
& ATA_FLAG_DISABLED
)
2422 * ata_dev_pair - return other device on cable
2425 * Obtain the other device on the same cable, or if none is
2426 * present NULL is returned
2429 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2431 struct ata_link
*link
= adev
->link
;
2432 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2433 if (!ata_dev_enabled(pair
))
2439 * ata_port_disable - Disable port.
2440 * @ap: Port to be disabled.
2442 * Modify @ap data structure such that the system
2443 * thinks that the entire port is disabled, and should
2444 * never attempt to probe or communicate with devices
2447 * LOCKING: host lock, or some other form of
2451 void ata_port_disable(struct ata_port
*ap
)
2453 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2454 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2455 ap
->flags
|= ATA_FLAG_DISABLED
;
2459 * sata_down_spd_limit - adjust SATA spd limit downward
2460 * @link: Link to adjust SATA spd limit for
2462 * Adjust SATA spd limit of @link downward. Note that this
2463 * function only adjusts the limit. The change must be applied
2464 * using sata_set_spd().
2467 * Inherited from caller.
2470 * 0 on success, negative errno on failure
2472 int sata_down_spd_limit(struct ata_link
*link
)
2474 u32 sstatus
, spd
, mask
;
2477 if (!sata_scr_valid(link
))
2480 /* If SCR can be read, use it to determine the current SPD.
2481 * If not, use cached value in link->sata_spd.
2483 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2485 spd
= (sstatus
>> 4) & 0xf;
2487 spd
= link
->sata_spd
;
2489 mask
= link
->sata_spd_limit
;
2493 /* unconditionally mask off the highest bit */
2494 highbit
= fls(mask
) - 1;
2495 mask
&= ~(1 << highbit
);
2497 /* Mask off all speeds higher than or equal to the current
2498 * one. Force 1.5Gbps if current SPD is not available.
2501 mask
&= (1 << (spd
- 1)) - 1;
2505 /* were we already at the bottom? */
2509 link
->sata_spd_limit
= mask
;
2511 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2512 sata_spd_string(fls(mask
)));
2517 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2521 if (link
->sata_spd_limit
== UINT_MAX
)
2524 limit
= fls(link
->sata_spd_limit
);
2526 spd
= (*scontrol
>> 4) & 0xf;
2527 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2529 return spd
!= limit
;
2533 * sata_set_spd_needed - is SATA spd configuration needed
2534 * @link: Link in question
2536 * Test whether the spd limit in SControl matches
2537 * @link->sata_spd_limit. This function is used to determine
2538 * whether hardreset is necessary to apply SATA spd
2542 * Inherited from caller.
2545 * 1 if SATA spd configuration is needed, 0 otherwise.
2547 int sata_set_spd_needed(struct ata_link
*link
)
2551 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2554 return __sata_set_spd_needed(link
, &scontrol
);
2558 * sata_set_spd - set SATA spd according to spd limit
2559 * @link: Link to set SATA spd for
2561 * Set SATA spd of @link according to sata_spd_limit.
2564 * Inherited from caller.
2567 * 0 if spd doesn't need to be changed, 1 if spd has been
2568 * changed. Negative errno if SCR registers are inaccessible.
2570 int sata_set_spd(struct ata_link
*link
)
2575 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2578 if (!__sata_set_spd_needed(link
, &scontrol
))
2581 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2588 * This mode timing computation functionality is ported over from
2589 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2592 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2593 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2594 * for UDMA6, which is currently supported only by Maxtor drives.
2596 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2599 static const struct ata_timing ata_timing
[] = {
2601 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2602 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2603 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2604 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2606 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2607 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2608 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2609 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2610 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2612 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2614 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2615 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2616 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2618 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2619 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2620 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2622 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2623 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2624 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2625 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2627 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2628 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2629 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2631 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2636 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2637 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2639 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2641 q
->setup
= EZ(t
->setup
* 1000, T
);
2642 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2643 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2644 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2645 q
->active
= EZ(t
->active
* 1000, T
);
2646 q
->recover
= EZ(t
->recover
* 1000, T
);
2647 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2648 q
->udma
= EZ(t
->udma
* 1000, UT
);
2651 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2652 struct ata_timing
*m
, unsigned int what
)
2654 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2655 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2656 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2657 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2658 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2659 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2660 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2661 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2664 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2666 const struct ata_timing
*t
;
2668 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2669 if (t
->mode
== 0xFF)
2674 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2675 struct ata_timing
*t
, int T
, int UT
)
2677 const struct ata_timing
*s
;
2678 struct ata_timing p
;
2684 if (!(s
= ata_timing_find_mode(speed
)))
2687 memcpy(t
, s
, sizeof(*s
));
2690 * If the drive is an EIDE drive, it can tell us it needs extended
2691 * PIO/MW_DMA cycle timing.
2694 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2695 memset(&p
, 0, sizeof(p
));
2696 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2697 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2698 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2699 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2700 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2702 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2706 * Convert the timing to bus clock counts.
2709 ata_timing_quantize(t
, t
, T
, UT
);
2712 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2713 * S.M.A.R.T * and some other commands. We have to ensure that the
2714 * DMA cycle timing is slower/equal than the fastest PIO timing.
2717 if (speed
> XFER_PIO_6
) {
2718 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2719 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2723 * Lengthen active & recovery time so that cycle time is correct.
2726 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2727 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2728 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2731 if (t
->active
+ t
->recover
< t
->cycle
) {
2732 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2733 t
->recover
= t
->cycle
- t
->active
;
2736 /* In a few cases quantisation may produce enough errors to
2737 leave t->cycle too low for the sum of active and recovery
2738 if so we must correct this */
2739 if (t
->active
+ t
->recover
> t
->cycle
)
2740 t
->cycle
= t
->active
+ t
->recover
;
2746 * ata_down_xfermask_limit - adjust dev xfer masks downward
2747 * @dev: Device to adjust xfer masks
2748 * @sel: ATA_DNXFER_* selector
2750 * Adjust xfer masks of @dev downward. Note that this function
2751 * does not apply the change. Invoking ata_set_mode() afterwards
2752 * will apply the limit.
2755 * Inherited from caller.
2758 * 0 on success, negative errno on failure
2760 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2763 unsigned int orig_mask
, xfer_mask
;
2764 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2767 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2768 sel
&= ~ATA_DNXFER_QUIET
;
2770 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2773 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2776 case ATA_DNXFER_PIO
:
2777 highbit
= fls(pio_mask
) - 1;
2778 pio_mask
&= ~(1 << highbit
);
2781 case ATA_DNXFER_DMA
:
2783 highbit
= fls(udma_mask
) - 1;
2784 udma_mask
&= ~(1 << highbit
);
2787 } else if (mwdma_mask
) {
2788 highbit
= fls(mwdma_mask
) - 1;
2789 mwdma_mask
&= ~(1 << highbit
);
2795 case ATA_DNXFER_40C
:
2796 udma_mask
&= ATA_UDMA_MASK_40C
;
2799 case ATA_DNXFER_FORCE_PIO0
:
2801 case ATA_DNXFER_FORCE_PIO
:
2810 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2812 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2816 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2817 snprintf(buf
, sizeof(buf
), "%s:%s",
2818 ata_mode_string(xfer_mask
),
2819 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2821 snprintf(buf
, sizeof(buf
), "%s",
2822 ata_mode_string(xfer_mask
));
2824 ata_dev_printk(dev
, KERN_WARNING
,
2825 "limiting speed to %s\n", buf
);
2828 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2834 static int ata_dev_set_mode(struct ata_device
*dev
)
2836 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2837 unsigned int err_mask
;
2840 dev
->flags
&= ~ATA_DFLAG_PIO
;
2841 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2842 dev
->flags
|= ATA_DFLAG_PIO
;
2844 err_mask
= ata_dev_set_xfermode(dev
);
2845 /* Old CFA may refuse this command, which is just fine */
2846 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2847 err_mask
&= ~AC_ERR_DEV
;
2848 /* Some very old devices and some bad newer ones fail any kind of
2849 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2850 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2851 dev
->pio_mode
<= XFER_PIO_2
)
2852 err_mask
&= ~AC_ERR_DEV
;
2854 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2855 "(err_mask=0x%x)\n", err_mask
);
2859 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2860 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
2861 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2865 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2866 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2868 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2869 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2874 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2875 * @link: link on which timings will be programmed
2876 * @r_failed_dev: out paramter for failed device
2878 * Standard implementation of the function used to tune and set
2879 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2880 * ata_dev_set_mode() fails, pointer to the failing device is
2881 * returned in @r_failed_dev.
2884 * PCI/etc. bus probe sem.
2887 * 0 on success, negative errno otherwise
2890 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2892 struct ata_port
*ap
= link
->ap
;
2893 struct ata_device
*dev
;
2894 int rc
= 0, used_dma
= 0, found
= 0;
2896 /* step 1: calculate xfer_mask */
2897 ata_link_for_each_dev(dev
, link
) {
2898 unsigned int pio_mask
, dma_mask
;
2900 if (!ata_dev_enabled(dev
))
2903 ata_dev_xfermask(dev
);
2905 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2906 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2907 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2908 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2917 /* step 2: always set host PIO timings */
2918 ata_link_for_each_dev(dev
, link
) {
2919 if (!ata_dev_enabled(dev
))
2922 if (!dev
->pio_mode
) {
2923 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2928 dev
->xfer_mode
= dev
->pio_mode
;
2929 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2930 if (ap
->ops
->set_piomode
)
2931 ap
->ops
->set_piomode(ap
, dev
);
2934 /* step 3: set host DMA timings */
2935 ata_link_for_each_dev(dev
, link
) {
2936 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2939 dev
->xfer_mode
= dev
->dma_mode
;
2940 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2941 if (ap
->ops
->set_dmamode
)
2942 ap
->ops
->set_dmamode(ap
, dev
);
2945 /* step 4: update devices' xfer mode */
2946 ata_link_for_each_dev(dev
, link
) {
2947 /* don't update suspended devices' xfer mode */
2948 if (!ata_dev_enabled(dev
))
2951 rc
= ata_dev_set_mode(dev
);
2956 /* Record simplex status. If we selected DMA then the other
2957 * host channels are not permitted to do so.
2959 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2960 ap
->host
->simplex_claimed
= ap
;
2964 *r_failed_dev
= dev
;
2969 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2970 * @link: link on which timings will be programmed
2971 * @r_failed_dev: out paramter for failed device
2973 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2974 * ata_set_mode() fails, pointer to the failing device is
2975 * returned in @r_failed_dev.
2978 * PCI/etc. bus probe sem.
2981 * 0 on success, negative errno otherwise
2983 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2985 struct ata_port
*ap
= link
->ap
;
2987 /* has private set_mode? */
2988 if (ap
->ops
->set_mode
)
2989 return ap
->ops
->set_mode(link
, r_failed_dev
);
2990 return ata_do_set_mode(link
, r_failed_dev
);
2994 * ata_tf_to_host - issue ATA taskfile to host controller
2995 * @ap: port to which command is being issued
2996 * @tf: ATA taskfile register set
2998 * Issues ATA taskfile register set to ATA host controller,
2999 * with proper synchronization with interrupt handler and
3003 * spin_lock_irqsave(host lock)
3006 static inline void ata_tf_to_host(struct ata_port
*ap
,
3007 const struct ata_taskfile
*tf
)
3009 ap
->ops
->tf_load(ap
, tf
);
3010 ap
->ops
->exec_command(ap
, tf
);
3014 * ata_busy_sleep - sleep until BSY clears, or timeout
3015 * @ap: port containing status register to be polled
3016 * @tmout_pat: impatience timeout
3017 * @tmout: overall timeout
3019 * Sleep until ATA Status register bit BSY clears,
3020 * or a timeout occurs.
3023 * Kernel thread context (may sleep).
3026 * 0 on success, -errno otherwise.
3028 int ata_busy_sleep(struct ata_port
*ap
,
3029 unsigned long tmout_pat
, unsigned long tmout
)
3031 unsigned long timer_start
, timeout
;
3034 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3035 timer_start
= jiffies
;
3036 timeout
= timer_start
+ tmout_pat
;
3037 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3038 time_before(jiffies
, timeout
)) {
3040 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3043 if (status
!= 0xff && (status
& ATA_BUSY
))
3044 ata_port_printk(ap
, KERN_WARNING
,
3045 "port is slow to respond, please be patient "
3046 "(Status 0x%x)\n", status
);
3048 timeout
= timer_start
+ tmout
;
3049 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3050 time_before(jiffies
, timeout
)) {
3052 status
= ata_chk_status(ap
);
3058 if (status
& ATA_BUSY
) {
3059 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3060 "(%lu secs, Status 0x%x)\n",
3061 tmout
/ HZ
, status
);
3069 * ata_wait_ready - sleep until BSY clears, or timeout
3070 * @ap: port containing status register to be polled
3071 * @deadline: deadline jiffies for the operation
3073 * Sleep until ATA Status register bit BSY clears, or timeout
3077 * Kernel thread context (may sleep).
3080 * 0 on success, -errno otherwise.
3082 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3084 unsigned long start
= jiffies
;
3088 u8 status
= ata_chk_status(ap
);
3089 unsigned long now
= jiffies
;
3091 if (!(status
& ATA_BUSY
))
3093 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3095 if (time_after(now
, deadline
))
3098 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3099 (deadline
- now
> 3 * HZ
)) {
3100 ata_port_printk(ap
, KERN_WARNING
,
3101 "port is slow to respond, please be patient "
3102 "(Status 0x%x)\n", status
);
3110 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3111 unsigned long deadline
)
3113 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3114 unsigned int dev0
= devmask
& (1 << 0);
3115 unsigned int dev1
= devmask
& (1 << 1);
3118 /* if device 0 was found in ata_devchk, wait for its
3122 rc
= ata_wait_ready(ap
, deadline
);
3130 /* if device 1 was found in ata_devchk, wait for register
3131 * access briefly, then wait for BSY to clear.
3136 ap
->ops
->dev_select(ap
, 1);
3138 /* Wait for register access. Some ATAPI devices fail
3139 * to set nsect/lbal after reset, so don't waste too
3140 * much time on it. We're gonna wait for !BSY anyway.
3142 for (i
= 0; i
< 2; i
++) {
3145 nsect
= ioread8(ioaddr
->nsect_addr
);
3146 lbal
= ioread8(ioaddr
->lbal_addr
);
3147 if ((nsect
== 1) && (lbal
== 1))
3149 msleep(50); /* give drive a breather */
3152 rc
= ata_wait_ready(ap
, deadline
);
3160 /* is all this really necessary? */
3161 ap
->ops
->dev_select(ap
, 0);
3163 ap
->ops
->dev_select(ap
, 1);
3165 ap
->ops
->dev_select(ap
, 0);
3170 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3171 unsigned long deadline
)
3173 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3175 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3177 /* software reset. causes dev0 to be selected */
3178 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3179 udelay(20); /* FIXME: flush */
3180 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3181 udelay(20); /* FIXME: flush */
3182 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3184 /* spec mandates ">= 2ms" before checking status.
3185 * We wait 150ms, because that was the magic delay used for
3186 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3187 * between when the ATA command register is written, and then
3188 * status is checked. Because waiting for "a while" before
3189 * checking status is fine, post SRST, we perform this magic
3190 * delay here as well.
3192 * Old drivers/ide uses the 2mS rule and then waits for ready
3196 /* Before we perform post reset processing we want to see if
3197 * the bus shows 0xFF because the odd clown forgets the D7
3198 * pulldown resistor.
3200 if (ata_check_status(ap
) == 0xFF)
3203 return ata_bus_post_reset(ap
, devmask
, deadline
);
3207 * ata_bus_reset - reset host port and associated ATA channel
3208 * @ap: port to reset
3210 * This is typically the first time we actually start issuing
3211 * commands to the ATA channel. We wait for BSY to clear, then
3212 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3213 * result. Determine what devices, if any, are on the channel
3214 * by looking at the device 0/1 error register. Look at the signature
3215 * stored in each device's taskfile registers, to determine if
3216 * the device is ATA or ATAPI.
3219 * PCI/etc. bus probe sem.
3220 * Obtains host lock.
3223 * Sets ATA_FLAG_DISABLED if bus reset fails.
3226 void ata_bus_reset(struct ata_port
*ap
)
3228 struct ata_device
*device
= ap
->link
.device
;
3229 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3230 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3232 unsigned int dev0
, dev1
= 0, devmask
= 0;
3235 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3237 /* determine if device 0/1 are present */
3238 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3241 dev0
= ata_devchk(ap
, 0);
3243 dev1
= ata_devchk(ap
, 1);
3247 devmask
|= (1 << 0);
3249 devmask
|= (1 << 1);
3251 /* select device 0 again */
3252 ap
->ops
->dev_select(ap
, 0);
3254 /* issue bus reset */
3255 if (ap
->flags
& ATA_FLAG_SRST
) {
3256 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3257 if (rc
&& rc
!= -ENODEV
)
3262 * determine by signature whether we have ATA or ATAPI devices
3264 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3265 if ((slave_possible
) && (err
!= 0x81))
3266 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3268 /* is double-select really necessary? */
3269 if (device
[1].class != ATA_DEV_NONE
)
3270 ap
->ops
->dev_select(ap
, 1);
3271 if (device
[0].class != ATA_DEV_NONE
)
3272 ap
->ops
->dev_select(ap
, 0);
3274 /* if no devices were detected, disable this port */
3275 if ((device
[0].class == ATA_DEV_NONE
) &&
3276 (device
[1].class == ATA_DEV_NONE
))
3279 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3280 /* set up device control for ATA_FLAG_SATA_RESET */
3281 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3288 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3289 ata_port_disable(ap
);
3295 * sata_link_debounce - debounce SATA phy status
3296 * @link: ATA link to debounce SATA phy status for
3297 * @params: timing parameters { interval, duratinon, timeout } in msec
3298 * @deadline: deadline jiffies for the operation
3300 * Make sure SStatus of @link reaches stable state, determined by
3301 * holding the same value where DET is not 1 for @duration polled
3302 * every @interval, before @timeout. Timeout constraints the
3303 * beginning of the stable state. Because DET gets stuck at 1 on
3304 * some controllers after hot unplugging, this functions waits
3305 * until timeout then returns 0 if DET is stable at 1.
3307 * @timeout is further limited by @deadline. The sooner of the
3311 * Kernel thread context (may sleep)
3314 * 0 on success, -errno on failure.
3316 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3317 unsigned long deadline
)
3319 unsigned long interval_msec
= params
[0];
3320 unsigned long duration
= msecs_to_jiffies(params
[1]);
3321 unsigned long last_jiffies
, t
;
3325 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3326 if (time_before(t
, deadline
))
3329 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3334 last_jiffies
= jiffies
;
3337 msleep(interval_msec
);
3338 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3344 if (cur
== 1 && time_before(jiffies
, deadline
))
3346 if (time_after(jiffies
, last_jiffies
+ duration
))
3351 /* unstable, start over */
3353 last_jiffies
= jiffies
;
3355 /* Check deadline. If debouncing failed, return
3356 * -EPIPE to tell upper layer to lower link speed.
3358 if (time_after(jiffies
, deadline
))
3364 * sata_link_resume - resume SATA link
3365 * @link: ATA link to resume SATA
3366 * @params: timing parameters { interval, duratinon, timeout } in msec
3367 * @deadline: deadline jiffies for the operation
3369 * Resume SATA phy @link and debounce it.
3372 * Kernel thread context (may sleep)
3375 * 0 on success, -errno on failure.
3377 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3378 unsigned long deadline
)
3383 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3386 scontrol
= (scontrol
& 0x0f0) | 0x300;
3388 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3391 /* Some PHYs react badly if SStatus is pounded immediately
3392 * after resuming. Delay 200ms before debouncing.
3396 return sata_link_debounce(link
, params
, deadline
);
3400 * ata_std_prereset - prepare for reset
3401 * @link: ATA link to be reset
3402 * @deadline: deadline jiffies for the operation
3404 * @link is about to be reset. Initialize it. Failure from
3405 * prereset makes libata abort whole reset sequence and give up
3406 * that port, so prereset should be best-effort. It does its
3407 * best to prepare for reset sequence but if things go wrong, it
3408 * should just whine, not fail.
3411 * Kernel thread context (may sleep)
3414 * 0 on success, -errno otherwise.
3416 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3418 struct ata_port
*ap
= link
->ap
;
3419 struct ata_eh_context
*ehc
= &link
->eh_context
;
3420 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3423 /* handle link resume */
3424 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3425 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3426 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3428 /* if we're about to do hardreset, nothing more to do */
3429 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3432 /* if SATA, resume link */
3433 if (ap
->flags
& ATA_FLAG_SATA
) {
3434 rc
= sata_link_resume(link
, timing
, deadline
);
3435 /* whine about phy resume failure but proceed */
3436 if (rc
&& rc
!= -EOPNOTSUPP
)
3437 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3438 "link for reset (errno=%d)\n", rc
);
3441 /* Wait for !BSY if the controller can wait for the first D2H
3442 * Reg FIS and we don't know that no device is attached.
3444 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3445 rc
= ata_wait_ready(ap
, deadline
);
3446 if (rc
&& rc
!= -ENODEV
) {
3447 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3448 "(errno=%d), forcing hardreset\n", rc
);
3449 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3457 * ata_std_softreset - reset host port via ATA SRST
3458 * @link: ATA link to reset
3459 * @classes: resulting classes of attached devices
3460 * @deadline: deadline jiffies for the operation
3462 * Reset host port using ATA SRST.
3465 * Kernel thread context (may sleep)
3468 * 0 on success, -errno otherwise.
3470 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3471 unsigned long deadline
)
3473 struct ata_port
*ap
= link
->ap
;
3474 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3475 unsigned int devmask
= 0;
3481 if (ata_link_offline(link
)) {
3482 classes
[0] = ATA_DEV_NONE
;
3486 /* determine if device 0/1 are present */
3487 if (ata_devchk(ap
, 0))
3488 devmask
|= (1 << 0);
3489 if (slave_possible
&& ata_devchk(ap
, 1))
3490 devmask
|= (1 << 1);
3492 /* select device 0 again */
3493 ap
->ops
->dev_select(ap
, 0);
3495 /* issue bus reset */
3496 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3497 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3498 /* if link is occupied, -ENODEV too is an error */
3499 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3500 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3504 /* determine by signature whether we have ATA or ATAPI devices */
3505 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3506 devmask
& (1 << 0), &err
);
3507 if (slave_possible
&& err
!= 0x81)
3508 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3509 devmask
& (1 << 1), &err
);
3512 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3517 * sata_link_hardreset - reset link via SATA phy reset
3518 * @link: link to reset
3519 * @timing: timing parameters { interval, duratinon, timeout } in msec
3520 * @deadline: deadline jiffies for the operation
3522 * SATA phy-reset @link using DET bits of SControl register.
3525 * Kernel thread context (may sleep)
3528 * 0 on success, -errno otherwise.
3530 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3531 unsigned long deadline
)
3538 if (sata_set_spd_needed(link
)) {
3539 /* SATA spec says nothing about how to reconfigure
3540 * spd. To be on the safe side, turn off phy during
3541 * reconfiguration. This works for at least ICH7 AHCI
3544 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3547 scontrol
= (scontrol
& 0x0f0) | 0x304;
3549 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3555 /* issue phy wake/reset */
3556 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3559 scontrol
= (scontrol
& 0x0f0) | 0x301;
3561 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3564 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3565 * 10.4.2 says at least 1 ms.
3569 /* bring link back */
3570 rc
= sata_link_resume(link
, timing
, deadline
);
3572 DPRINTK("EXIT, rc=%d\n", rc
);
3577 * sata_std_hardreset - reset host port via SATA phy reset
3578 * @link: link to reset
3579 * @class: resulting class of attached device
3580 * @deadline: deadline jiffies for the operation
3582 * SATA phy-reset host port using DET bits of SControl register,
3583 * wait for !BSY and classify the attached device.
3586 * Kernel thread context (may sleep)
3589 * 0 on success, -errno otherwise.
3591 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3592 unsigned long deadline
)
3594 struct ata_port
*ap
= link
->ap
;
3595 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3601 rc
= sata_link_hardreset(link
, timing
, deadline
);
3603 ata_link_printk(link
, KERN_ERR
,
3604 "COMRESET failed (errno=%d)\n", rc
);
3608 /* TODO: phy layer with polling, timeouts, etc. */
3609 if (ata_link_offline(link
)) {
3610 *class = ATA_DEV_NONE
;
3611 DPRINTK("EXIT, link offline\n");
3615 /* wait a while before checking status, see SRST for more info */
3618 rc
= ata_wait_ready(ap
, deadline
);
3619 /* link occupied, -ENODEV too is an error */
3621 ata_link_printk(link
, KERN_ERR
,
3622 "COMRESET failed (errno=%d)\n", rc
);
3626 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3628 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3630 DPRINTK("EXIT, class=%u\n", *class);
3635 * ata_std_postreset - standard postreset callback
3636 * @link: the target ata_link
3637 * @classes: classes of attached devices
3639 * This function is invoked after a successful reset. Note that
3640 * the device might have been reset more than once using
3641 * different reset methods before postreset is invoked.
3644 * Kernel thread context (may sleep)
3646 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3648 struct ata_port
*ap
= link
->ap
;
3653 /* print link status */
3654 sata_print_link_status(link
);
3657 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3658 sata_scr_write(link
, SCR_ERROR
, serror
);
3660 /* is double-select really necessary? */
3661 if (classes
[0] != ATA_DEV_NONE
)
3662 ap
->ops
->dev_select(ap
, 1);
3663 if (classes
[1] != ATA_DEV_NONE
)
3664 ap
->ops
->dev_select(ap
, 0);
3666 /* bail out if no device is present */
3667 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3668 DPRINTK("EXIT, no device\n");
3672 /* set up device control */
3673 if (ap
->ioaddr
.ctl_addr
)
3674 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3680 * ata_dev_same_device - Determine whether new ID matches configured device
3681 * @dev: device to compare against
3682 * @new_class: class of the new device
3683 * @new_id: IDENTIFY page of the new device
3685 * Compare @new_class and @new_id against @dev and determine
3686 * whether @dev is the device indicated by @new_class and
3693 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3695 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3698 const u16
*old_id
= dev
->id
;
3699 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3700 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3702 if (dev
->class != new_class
) {
3703 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3704 dev
->class, new_class
);
3708 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3709 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3710 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3711 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3713 if (strcmp(model
[0], model
[1])) {
3714 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3715 "'%s' != '%s'\n", model
[0], model
[1]);
3719 if (strcmp(serial
[0], serial
[1])) {
3720 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3721 "'%s' != '%s'\n", serial
[0], serial
[1]);
3729 * ata_dev_reread_id - Re-read IDENTIFY data
3730 * @dev: target ATA device
3731 * @readid_flags: read ID flags
3733 * Re-read IDENTIFY page and make sure @dev is still attached to
3737 * Kernel thread context (may sleep)
3740 * 0 on success, negative errno otherwise
3742 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3744 unsigned int class = dev
->class;
3745 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3749 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3753 /* is the device still there? */
3754 if (!ata_dev_same_device(dev
, class, id
))
3757 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3762 * ata_dev_revalidate - Revalidate ATA device
3763 * @dev: device to revalidate
3764 * @new_class: new class code
3765 * @readid_flags: read ID flags
3767 * Re-read IDENTIFY page, make sure @dev is still attached to the
3768 * port and reconfigure it according to the new IDENTIFY page.
3771 * Kernel thread context (may sleep)
3774 * 0 on success, negative errno otherwise
3776 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3777 unsigned int readid_flags
)
3779 u64 n_sectors
= dev
->n_sectors
;
3782 if (!ata_dev_enabled(dev
))
3785 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3786 if (ata_class_enabled(new_class
) &&
3787 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3788 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3789 dev
->class, new_class
);
3795 rc
= ata_dev_reread_id(dev
, readid_flags
);
3799 /* configure device according to the new ID */
3800 rc
= ata_dev_configure(dev
);
3804 /* verify n_sectors hasn't changed */
3805 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3806 dev
->n_sectors
!= n_sectors
) {
3807 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3809 (unsigned long long)n_sectors
,
3810 (unsigned long long)dev
->n_sectors
);
3812 /* restore original n_sectors */
3813 dev
->n_sectors
= n_sectors
;
3822 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3826 struct ata_blacklist_entry
{
3827 const char *model_num
;
3828 const char *model_rev
;
3829 unsigned long horkage
;
3832 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3833 /* Devices with DMA related problems under Linux */
3834 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3835 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3836 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3837 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3838 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3839 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3840 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3841 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3842 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3843 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3844 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3845 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3846 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3847 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3848 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3849 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3850 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3851 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3852 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3853 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3854 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3855 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3856 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3857 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3858 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3859 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3860 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3861 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3862 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3863 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3864 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3865 { "IOMEGA ZIP 250 ATAPI Floppy",
3866 NULL
, ATA_HORKAGE_NODMA
},
3868 /* Weird ATAPI devices */
3869 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3871 /* Devices we expect to fail diagnostics */
3873 /* Devices where NCQ should be avoided */
3875 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3876 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3877 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3879 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3880 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3881 { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
3882 ATA_HORKAGE_NONCQ
},
3884 /* Blacklist entries taken from Silicon Image 3124/3132
3885 Windows driver .inf file - also several Linux problem reports */
3886 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3887 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3888 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3889 /* Drives which do spurious command completion */
3890 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3891 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3892 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3893 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3894 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3895 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3896 { "ST3160812AS", "3.AD", ATA_HORKAGE_NONCQ
, },
3897 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3899 /* devices which puke on READ_NATIVE_MAX */
3900 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3901 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3902 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3903 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3909 int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
3915 * check for trailing wildcard: *\0
3917 p
= strchr(patt
, wildchar
);
3918 if (p
&& ((*(p
+ 1)) == 0))
3923 return strncmp(patt
, name
, len
);
3926 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3928 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3929 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3930 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3932 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3933 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3935 while (ad
->model_num
) {
3936 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
3937 if (ad
->model_rev
== NULL
)
3939 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
3947 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3949 /* We don't support polling DMA.
3950 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3951 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3953 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3954 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3956 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
3960 * ata_dev_xfermask - Compute supported xfermask of the given device
3961 * @dev: Device to compute xfermask for
3963 * Compute supported xfermask of @dev and store it in
3964 * dev->*_mask. This function is responsible for applying all
3965 * known limits including host controller limits, device
3971 static void ata_dev_xfermask(struct ata_device
*dev
)
3973 struct ata_link
*link
= dev
->link
;
3974 struct ata_port
*ap
= link
->ap
;
3975 struct ata_host
*host
= ap
->host
;
3976 unsigned long xfer_mask
;
3978 /* controller modes available */
3979 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3980 ap
->mwdma_mask
, ap
->udma_mask
);
3982 /* drive modes available */
3983 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3984 dev
->mwdma_mask
, dev
->udma_mask
);
3985 xfer_mask
&= ata_id_xfermask(dev
->id
);
3988 * CFA Advanced TrueIDE timings are not allowed on a shared
3991 if (ata_dev_pair(dev
)) {
3992 /* No PIO5 or PIO6 */
3993 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3994 /* No MWDMA3 or MWDMA 4 */
3995 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3998 if (ata_dma_blacklisted(dev
)) {
3999 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4000 ata_dev_printk(dev
, KERN_WARNING
,
4001 "device is on DMA blacklist, disabling DMA\n");
4004 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4005 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4006 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4007 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4008 "other device, disabling DMA\n");
4011 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4012 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4014 if (ap
->ops
->mode_filter
)
4015 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4017 /* Apply cable rule here. Don't apply it early because when
4018 * we handle hot plug the cable type can itself change.
4019 * Check this last so that we know if the transfer rate was
4020 * solely limited by the cable.
4021 * Unknown or 80 wire cables reported host side are checked
4022 * drive side as well. Cases where we know a 40wire cable
4023 * is used safely for 80 are not checked here.
4025 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4026 /* UDMA/44 or higher would be available */
4027 if((ap
->cbl
== ATA_CBL_PATA40
) ||
4028 (ata_drive_40wire(dev
->id
) &&
4029 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4030 ap
->cbl
== ATA_CBL_PATA80
))) {
4031 ata_dev_printk(dev
, KERN_WARNING
,
4032 "limited to UDMA/33 due to 40-wire cable\n");
4033 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4036 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4037 &dev
->mwdma_mask
, &dev
->udma_mask
);
4041 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4042 * @dev: Device to which command will be sent
4044 * Issue SET FEATURES - XFER MODE command to device @dev
4048 * PCI/etc. bus probe sem.
4051 * 0 on success, AC_ERR_* mask otherwise.
4054 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4056 struct ata_taskfile tf
;
4057 unsigned int err_mask
;
4059 /* set up set-features taskfile */
4060 DPRINTK("set features - xfer mode\n");
4062 /* Some controllers and ATAPI devices show flaky interrupt
4063 * behavior after setting xfer mode. Use polling instead.
4065 ata_tf_init(dev
, &tf
);
4066 tf
.command
= ATA_CMD_SET_FEATURES
;
4067 tf
.feature
= SETFEATURES_XFER
;
4068 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4069 tf
.protocol
= ATA_PROT_NODATA
;
4070 tf
.nsect
= dev
->xfer_mode
;
4072 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4074 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4079 * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
4080 * @dev: Device to which command will be sent
4081 * @enable: Whether to enable or disable the feature
4083 * Issue SET FEATURES - SATA FEATURES command to device @dev
4084 * on port @ap with sector count set to indicate Asynchronous
4085 * Notification feature
4088 * PCI/etc. bus probe sem.
4091 * 0 on success, AC_ERR_* mask otherwise.
4093 static unsigned int ata_dev_set_AN(struct ata_device
*dev
, u8 enable
)
4095 struct ata_taskfile tf
;
4096 unsigned int err_mask
;
4098 /* set up set-features taskfile */
4099 DPRINTK("set features - SATA features\n");
4101 ata_tf_init(dev
, &tf
);
4102 tf
.command
= ATA_CMD_SET_FEATURES
;
4103 tf
.feature
= enable
;
4104 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4105 tf
.protocol
= ATA_PROT_NODATA
;
4108 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4110 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4115 * ata_dev_init_params - Issue INIT DEV PARAMS command
4116 * @dev: Device to which command will be sent
4117 * @heads: Number of heads (taskfile parameter)
4118 * @sectors: Number of sectors (taskfile parameter)
4121 * Kernel thread context (may sleep)
4124 * 0 on success, AC_ERR_* mask otherwise.
4126 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4127 u16 heads
, u16 sectors
)
4129 struct ata_taskfile tf
;
4130 unsigned int err_mask
;
4132 /* Number of sectors per track 1-255. Number of heads 1-16 */
4133 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4134 return AC_ERR_INVALID
;
4136 /* set up init dev params taskfile */
4137 DPRINTK("init dev params \n");
4139 ata_tf_init(dev
, &tf
);
4140 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4141 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4142 tf
.protocol
= ATA_PROT_NODATA
;
4144 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4146 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
4147 /* A clean abort indicates an original or just out of spec drive
4148 and we should continue as we issue the setup based on the
4149 drive reported working geometry */
4150 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4153 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4158 * ata_sg_clean - Unmap DMA memory associated with command
4159 * @qc: Command containing DMA memory to be released
4161 * Unmap all mapped DMA memory associated with this command.
4164 * spin_lock_irqsave(host lock)
4166 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4168 struct ata_port
*ap
= qc
->ap
;
4169 struct scatterlist
*sg
= qc
->__sg
;
4170 int dir
= qc
->dma_dir
;
4171 void *pad_buf
= NULL
;
4173 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4174 WARN_ON(sg
== NULL
);
4176 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4177 WARN_ON(qc
->n_elem
> 1);
4179 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4181 /* if we padded the buffer out to 32-bit bound, and data
4182 * xfer direction is from-device, we must copy from the
4183 * pad buffer back into the supplied buffer
4185 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4186 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4188 if (qc
->flags
& ATA_QCFLAG_SG
) {
4190 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4191 /* restore last sg */
4192 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4194 struct scatterlist
*psg
= &qc
->pad_sgent
;
4195 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4196 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4197 kunmap_atomic(addr
, KM_IRQ0
);
4201 dma_unmap_single(ap
->dev
,
4202 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4205 sg
->length
+= qc
->pad_len
;
4207 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4208 pad_buf
, qc
->pad_len
);
4211 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4216 * ata_fill_sg - Fill PCI IDE PRD table
4217 * @qc: Metadata associated with taskfile to be transferred
4219 * Fill PCI IDE PRD (scatter-gather) table with segments
4220 * associated with the current disk command.
4223 * spin_lock_irqsave(host lock)
4226 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4228 struct ata_port
*ap
= qc
->ap
;
4229 struct scatterlist
*sg
;
4232 WARN_ON(qc
->__sg
== NULL
);
4233 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4236 ata_for_each_sg(sg
, qc
) {
4240 /* determine if physical DMA addr spans 64K boundary.
4241 * Note h/w doesn't support 64-bit, so we unconditionally
4242 * truncate dma_addr_t to u32.
4244 addr
= (u32
) sg_dma_address(sg
);
4245 sg_len
= sg_dma_len(sg
);
4248 offset
= addr
& 0xffff;
4250 if ((offset
+ sg_len
) > 0x10000)
4251 len
= 0x10000 - offset
;
4253 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4254 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4255 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4264 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4268 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4269 * @qc: Metadata associated with taskfile to be transferred
4271 * Fill PCI IDE PRD (scatter-gather) table with segments
4272 * associated with the current disk command. Perform the fill
4273 * so that we avoid writing any length 64K records for
4274 * controllers that don't follow the spec.
4277 * spin_lock_irqsave(host lock)
4280 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4282 struct ata_port
*ap
= qc
->ap
;
4283 struct scatterlist
*sg
;
4286 WARN_ON(qc
->__sg
== NULL
);
4287 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4290 ata_for_each_sg(sg
, qc
) {
4292 u32 sg_len
, len
, blen
;
4294 /* determine if physical DMA addr spans 64K boundary.
4295 * Note h/w doesn't support 64-bit, so we unconditionally
4296 * truncate dma_addr_t to u32.
4298 addr
= (u32
) sg_dma_address(sg
);
4299 sg_len
= sg_dma_len(sg
);
4302 offset
= addr
& 0xffff;
4304 if ((offset
+ sg_len
) > 0x10000)
4305 len
= 0x10000 - offset
;
4307 blen
= len
& 0xffff;
4308 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4310 /* Some PATA chipsets like the CS5530 can't
4311 cope with 0x0000 meaning 64K as the spec says */
4312 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4314 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4316 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4317 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4326 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4330 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4331 * @qc: Metadata associated with taskfile to check
4333 * Allow low-level driver to filter ATA PACKET commands, returning
4334 * a status indicating whether or not it is OK to use DMA for the
4335 * supplied PACKET command.
4338 * spin_lock_irqsave(host lock)
4340 * RETURNS: 0 when ATAPI DMA can be used
4343 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4345 struct ata_port
*ap
= qc
->ap
;
4347 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4348 * few ATAPI devices choke on such DMA requests.
4350 if (unlikely(qc
->nbytes
& 15))
4353 if (ap
->ops
->check_atapi_dma
)
4354 return ap
->ops
->check_atapi_dma(qc
);
4360 * ata_std_qc_defer - Check whether a qc needs to be deferred
4361 * @qc: ATA command in question
4363 * Non-NCQ commands cannot run with any other command, NCQ or
4364 * not. As upper layer only knows the queue depth, we are
4365 * responsible for maintaining exclusion. This function checks
4366 * whether a new command @qc can be issued.
4369 * spin_lock_irqsave(host lock)
4372 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4374 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4376 struct ata_link
*link
= qc
->dev
->link
;
4378 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4379 if (!ata_tag_valid(link
->active_tag
))
4382 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4386 return ATA_DEFER_LINK
;
4390 * ata_qc_prep - Prepare taskfile for submission
4391 * @qc: Metadata associated with taskfile to be prepared
4393 * Prepare ATA taskfile for submission.
4396 * spin_lock_irqsave(host lock)
4398 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4400 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4407 * ata_dumb_qc_prep - Prepare taskfile for submission
4408 * @qc: Metadata associated with taskfile to be prepared
4410 * Prepare ATA taskfile for submission.
4413 * spin_lock_irqsave(host lock)
4415 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4417 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4420 ata_fill_sg_dumb(qc
);
4423 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4426 * ata_sg_init_one - Associate command with memory buffer
4427 * @qc: Command to be associated
4428 * @buf: Memory buffer
4429 * @buflen: Length of memory buffer, in bytes.
4431 * Initialize the data-related elements of queued_cmd @qc
4432 * to point to a single memory buffer, @buf of byte length @buflen.
4435 * spin_lock_irqsave(host lock)
4438 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4440 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4442 qc
->__sg
= &qc
->sgent
;
4444 qc
->orig_n_elem
= 1;
4446 qc
->nbytes
= buflen
;
4448 sg_init_one(&qc
->sgent
, buf
, buflen
);
4452 * ata_sg_init - Associate command with scatter-gather table.
4453 * @qc: Command to be associated
4454 * @sg: Scatter-gather table.
4455 * @n_elem: Number of elements in s/g table.
4457 * Initialize the data-related elements of queued_cmd @qc
4458 * to point to a scatter-gather table @sg, containing @n_elem
4462 * spin_lock_irqsave(host lock)
4465 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4466 unsigned int n_elem
)
4468 qc
->flags
|= ATA_QCFLAG_SG
;
4470 qc
->n_elem
= n_elem
;
4471 qc
->orig_n_elem
= n_elem
;
4475 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4476 * @qc: Command with memory buffer to be mapped.
4478 * DMA-map the memory buffer associated with queued_cmd @qc.
4481 * spin_lock_irqsave(host lock)
4484 * Zero on success, negative on error.
4487 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4489 struct ata_port
*ap
= qc
->ap
;
4490 int dir
= qc
->dma_dir
;
4491 struct scatterlist
*sg
= qc
->__sg
;
4492 dma_addr_t dma_address
;
4495 /* we must lengthen transfers to end on a 32-bit boundary */
4496 qc
->pad_len
= sg
->length
& 3;
4498 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4499 struct scatterlist
*psg
= &qc
->pad_sgent
;
4501 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4503 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4505 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4506 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4509 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4510 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4512 sg
->length
-= qc
->pad_len
;
4513 if (sg
->length
== 0)
4516 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4517 sg
->length
, qc
->pad_len
);
4525 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4527 if (dma_mapping_error(dma_address
)) {
4529 sg
->length
+= qc
->pad_len
;
4533 sg_dma_address(sg
) = dma_address
;
4534 sg_dma_len(sg
) = sg
->length
;
4537 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4538 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4544 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4545 * @qc: Command with scatter-gather table to be mapped.
4547 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4550 * spin_lock_irqsave(host lock)
4553 * Zero on success, negative on error.
4557 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4559 struct ata_port
*ap
= qc
->ap
;
4560 struct scatterlist
*sg
= qc
->__sg
;
4561 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4562 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4564 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4565 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4567 /* we must lengthen transfers to end on a 32-bit boundary */
4568 qc
->pad_len
= lsg
->length
& 3;
4570 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4571 struct scatterlist
*psg
= &qc
->pad_sgent
;
4572 unsigned int offset
;
4574 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4576 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4579 * psg->page/offset are used to copy to-be-written
4580 * data in this function or read data in ata_sg_clean.
4582 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4583 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4584 psg
->offset
= offset_in_page(offset
);
4586 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4587 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4588 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4589 kunmap_atomic(addr
, KM_IRQ0
);
4592 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4593 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4595 lsg
->length
-= qc
->pad_len
;
4596 if (lsg
->length
== 0)
4599 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4600 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4603 pre_n_elem
= qc
->n_elem
;
4604 if (trim_sg
&& pre_n_elem
)
4613 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4615 /* restore last sg */
4616 lsg
->length
+= qc
->pad_len
;
4620 DPRINTK("%d sg elements mapped\n", n_elem
);
4623 qc
->n_elem
= n_elem
;
4629 * swap_buf_le16 - swap halves of 16-bit words in place
4630 * @buf: Buffer to swap
4631 * @buf_words: Number of 16-bit words in buffer.
4633 * Swap halves of 16-bit words if needed to convert from
4634 * little-endian byte order to native cpu byte order, or
4638 * Inherited from caller.
4640 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4645 for (i
= 0; i
< buf_words
; i
++)
4646 buf
[i
] = le16_to_cpu(buf
[i
]);
4647 #endif /* __BIG_ENDIAN */
4651 * ata_data_xfer - Transfer data by PIO
4652 * @adev: device to target
4654 * @buflen: buffer length
4655 * @write_data: read/write
4657 * Transfer data from/to the device data register by PIO.
4660 * Inherited from caller.
4662 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4663 unsigned int buflen
, int write_data
)
4665 struct ata_port
*ap
= adev
->link
->ap
;
4666 unsigned int words
= buflen
>> 1;
4668 /* Transfer multiple of 2 bytes */
4670 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4672 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4674 /* Transfer trailing 1 byte, if any. */
4675 if (unlikely(buflen
& 0x01)) {
4676 u16 align_buf
[1] = { 0 };
4677 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4680 memcpy(align_buf
, trailing_buf
, 1);
4681 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4683 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4684 memcpy(trailing_buf
, align_buf
, 1);
4690 * ata_data_xfer_noirq - Transfer data by PIO
4691 * @adev: device to target
4693 * @buflen: buffer length
4694 * @write_data: read/write
4696 * Transfer data from/to the device data register by PIO. Do the
4697 * transfer with interrupts disabled.
4700 * Inherited from caller.
4702 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4703 unsigned int buflen
, int write_data
)
4705 unsigned long flags
;
4706 local_irq_save(flags
);
4707 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4708 local_irq_restore(flags
);
4713 * ata_pio_sector - Transfer a sector of data.
4714 * @qc: Command on going
4716 * Transfer qc->sect_size bytes of data from/to the ATA device.
4719 * Inherited from caller.
4722 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4724 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4725 struct scatterlist
*sg
= qc
->__sg
;
4726 struct ata_port
*ap
= qc
->ap
;
4728 unsigned int offset
;
4731 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4732 ap
->hsm_task_state
= HSM_ST_LAST
;
4734 page
= sg
[qc
->cursg
].page
;
4735 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4737 /* get the current page and offset */
4738 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4739 offset
%= PAGE_SIZE
;
4741 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4743 if (PageHighMem(page
)) {
4744 unsigned long flags
;
4746 /* FIXME: use a bounce buffer */
4747 local_irq_save(flags
);
4748 buf
= kmap_atomic(page
, KM_IRQ0
);
4750 /* do the actual data transfer */
4751 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4753 kunmap_atomic(buf
, KM_IRQ0
);
4754 local_irq_restore(flags
);
4756 buf
= page_address(page
);
4757 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4760 qc
->curbytes
+= qc
->sect_size
;
4761 qc
->cursg_ofs
+= qc
->sect_size
;
4763 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4770 * ata_pio_sectors - Transfer one or many sectors.
4771 * @qc: Command on going
4773 * Transfer one or many sectors of data from/to the
4774 * ATA device for the DRQ request.
4777 * Inherited from caller.
4780 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4782 if (is_multi_taskfile(&qc
->tf
)) {
4783 /* READ/WRITE MULTIPLE */
4786 WARN_ON(qc
->dev
->multi_count
== 0);
4788 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4789 qc
->dev
->multi_count
);
4795 ata_altstatus(qc
->ap
); /* flush */
4799 * atapi_send_cdb - Write CDB bytes to hardware
4800 * @ap: Port to which ATAPI device is attached.
4801 * @qc: Taskfile currently active
4803 * When device has indicated its readiness to accept
4804 * a CDB, this function is called. Send the CDB.
4810 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4813 DPRINTK("send cdb\n");
4814 WARN_ON(qc
->dev
->cdb_len
< 12);
4816 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4817 ata_altstatus(ap
); /* flush */
4819 switch (qc
->tf
.protocol
) {
4820 case ATA_PROT_ATAPI
:
4821 ap
->hsm_task_state
= HSM_ST
;
4823 case ATA_PROT_ATAPI_NODATA
:
4824 ap
->hsm_task_state
= HSM_ST_LAST
;
4826 case ATA_PROT_ATAPI_DMA
:
4827 ap
->hsm_task_state
= HSM_ST_LAST
;
4828 /* initiate bmdma */
4829 ap
->ops
->bmdma_start(qc
);
4835 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4836 * @qc: Command on going
4837 * @bytes: number of bytes
4839 * Transfer Transfer data from/to the ATAPI device.
4842 * Inherited from caller.
4846 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4848 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4849 struct scatterlist
*sg
= qc
->__sg
;
4850 struct ata_port
*ap
= qc
->ap
;
4853 unsigned int offset
, count
;
4855 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4856 ap
->hsm_task_state
= HSM_ST_LAST
;
4859 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4861 * The end of qc->sg is reached and the device expects
4862 * more data to transfer. In order not to overrun qc->sg
4863 * and fulfill length specified in the byte count register,
4864 * - for read case, discard trailing data from the device
4865 * - for write case, padding zero data to the device
4867 u16 pad_buf
[1] = { 0 };
4868 unsigned int words
= bytes
>> 1;
4871 if (words
) /* warning if bytes > 1 */
4872 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4873 "%u bytes trailing data\n", bytes
);
4875 for (i
= 0; i
< words
; i
++)
4876 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4878 ap
->hsm_task_state
= HSM_ST_LAST
;
4882 sg
= &qc
->__sg
[qc
->cursg
];
4885 offset
= sg
->offset
+ qc
->cursg_ofs
;
4887 /* get the current page and offset */
4888 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4889 offset
%= PAGE_SIZE
;
4891 /* don't overrun current sg */
4892 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4894 /* don't cross page boundaries */
4895 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4897 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4899 if (PageHighMem(page
)) {
4900 unsigned long flags
;
4902 /* FIXME: use bounce buffer */
4903 local_irq_save(flags
);
4904 buf
= kmap_atomic(page
, KM_IRQ0
);
4906 /* do the actual data transfer */
4907 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4909 kunmap_atomic(buf
, KM_IRQ0
);
4910 local_irq_restore(flags
);
4912 buf
= page_address(page
);
4913 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4917 qc
->curbytes
+= count
;
4918 qc
->cursg_ofs
+= count
;
4920 if (qc
->cursg_ofs
== sg
->length
) {
4930 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4931 * @qc: Command on going
4933 * Transfer Transfer data from/to the ATAPI device.
4936 * Inherited from caller.
4939 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4941 struct ata_port
*ap
= qc
->ap
;
4942 struct ata_device
*dev
= qc
->dev
;
4943 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4944 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4946 /* Abuse qc->result_tf for temp storage of intermediate TF
4947 * here to save some kernel stack usage.
4948 * For normal completion, qc->result_tf is not relevant. For
4949 * error, qc->result_tf is later overwritten by ata_qc_complete().
4950 * So, the correctness of qc->result_tf is not affected.
4952 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4953 ireason
= qc
->result_tf
.nsect
;
4954 bc_lo
= qc
->result_tf
.lbam
;
4955 bc_hi
= qc
->result_tf
.lbah
;
4956 bytes
= (bc_hi
<< 8) | bc_lo
;
4958 /* shall be cleared to zero, indicating xfer of data */
4959 if (ireason
& (1 << 0))
4962 /* make sure transfer direction matches expected */
4963 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4964 if (do_write
!= i_write
)
4967 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4969 __atapi_pio_bytes(qc
, bytes
);
4970 ata_altstatus(ap
); /* flush */
4975 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4976 qc
->err_mask
|= AC_ERR_HSM
;
4977 ap
->hsm_task_state
= HSM_ST_ERR
;
4981 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4982 * @ap: the target ata_port
4986 * 1 if ok in workqueue, 0 otherwise.
4989 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4991 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4994 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4995 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4996 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4999 if (is_atapi_taskfile(&qc
->tf
) &&
5000 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5008 * ata_hsm_qc_complete - finish a qc running on standard HSM
5009 * @qc: Command to complete
5010 * @in_wq: 1 if called from workqueue, 0 otherwise
5012 * Finish @qc which is running on standard HSM.
5015 * If @in_wq is zero, spin_lock_irqsave(host lock).
5016 * Otherwise, none on entry and grabs host lock.
5018 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5020 struct ata_port
*ap
= qc
->ap
;
5021 unsigned long flags
;
5023 if (ap
->ops
->error_handler
) {
5025 spin_lock_irqsave(ap
->lock
, flags
);
5027 /* EH might have kicked in while host lock is
5030 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5032 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5033 ap
->ops
->irq_on(ap
);
5034 ata_qc_complete(qc
);
5036 ata_port_freeze(ap
);
5039 spin_unlock_irqrestore(ap
->lock
, flags
);
5041 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5042 ata_qc_complete(qc
);
5044 ata_port_freeze(ap
);
5048 spin_lock_irqsave(ap
->lock
, flags
);
5049 ap
->ops
->irq_on(ap
);
5050 ata_qc_complete(qc
);
5051 spin_unlock_irqrestore(ap
->lock
, flags
);
5053 ata_qc_complete(qc
);
5058 * ata_hsm_move - move the HSM to the next state.
5059 * @ap: the target ata_port
5061 * @status: current device status
5062 * @in_wq: 1 if called from workqueue, 0 otherwise
5065 * 1 when poll next status needed, 0 otherwise.
5067 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5068 u8 status
, int in_wq
)
5070 unsigned long flags
= 0;
5073 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5075 /* Make sure ata_qc_issue_prot() does not throw things
5076 * like DMA polling into the workqueue. Notice that
5077 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5079 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5082 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5083 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5085 switch (ap
->hsm_task_state
) {
5087 /* Send first data block or PACKET CDB */
5089 /* If polling, we will stay in the work queue after
5090 * sending the data. Otherwise, interrupt handler
5091 * takes over after sending the data.
5093 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5095 /* check device status */
5096 if (unlikely((status
& ATA_DRQ
) == 0)) {
5097 /* handle BSY=0, DRQ=0 as error */
5098 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5099 /* device stops HSM for abort/error */
5100 qc
->err_mask
|= AC_ERR_DEV
;
5102 /* HSM violation. Let EH handle this */
5103 qc
->err_mask
|= AC_ERR_HSM
;
5105 ap
->hsm_task_state
= HSM_ST_ERR
;
5109 /* Device should not ask for data transfer (DRQ=1)
5110 * when it finds something wrong.
5111 * We ignore DRQ here and stop the HSM by
5112 * changing hsm_task_state to HSM_ST_ERR and
5113 * let the EH abort the command or reset the device.
5115 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5116 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5117 "error, dev_stat 0x%X\n", status
);
5118 qc
->err_mask
|= AC_ERR_HSM
;
5119 ap
->hsm_task_state
= HSM_ST_ERR
;
5123 /* Send the CDB (atapi) or the first data block (ata pio out).
5124 * During the state transition, interrupt handler shouldn't
5125 * be invoked before the data transfer is complete and
5126 * hsm_task_state is changed. Hence, the following locking.
5129 spin_lock_irqsave(ap
->lock
, flags
);
5131 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5132 /* PIO data out protocol.
5133 * send first data block.
5136 /* ata_pio_sectors() might change the state
5137 * to HSM_ST_LAST. so, the state is changed here
5138 * before ata_pio_sectors().
5140 ap
->hsm_task_state
= HSM_ST
;
5141 ata_pio_sectors(qc
);
5144 atapi_send_cdb(ap
, qc
);
5147 spin_unlock_irqrestore(ap
->lock
, flags
);
5149 /* if polling, ata_pio_task() handles the rest.
5150 * otherwise, interrupt handler takes over from here.
5155 /* complete command or read/write the data register */
5156 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5157 /* ATAPI PIO protocol */
5158 if ((status
& ATA_DRQ
) == 0) {
5159 /* No more data to transfer or device error.
5160 * Device error will be tagged in HSM_ST_LAST.
5162 ap
->hsm_task_state
= HSM_ST_LAST
;
5166 /* Device should not ask for data transfer (DRQ=1)
5167 * when it finds something wrong.
5168 * We ignore DRQ here and stop the HSM by
5169 * changing hsm_task_state to HSM_ST_ERR and
5170 * let the EH abort the command or reset the device.
5172 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5173 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5174 "device error, dev_stat 0x%X\n",
5176 qc
->err_mask
|= AC_ERR_HSM
;
5177 ap
->hsm_task_state
= HSM_ST_ERR
;
5181 atapi_pio_bytes(qc
);
5183 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5184 /* bad ireason reported by device */
5188 /* ATA PIO protocol */
5189 if (unlikely((status
& ATA_DRQ
) == 0)) {
5190 /* handle BSY=0, DRQ=0 as error */
5191 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5192 /* device stops HSM for abort/error */
5193 qc
->err_mask
|= AC_ERR_DEV
;
5195 /* HSM violation. Let EH handle this.
5196 * Phantom devices also trigger this
5197 * condition. Mark hint.
5199 qc
->err_mask
|= AC_ERR_HSM
|
5202 ap
->hsm_task_state
= HSM_ST_ERR
;
5206 /* For PIO reads, some devices may ask for
5207 * data transfer (DRQ=1) alone with ERR=1.
5208 * We respect DRQ here and transfer one
5209 * block of junk data before changing the
5210 * hsm_task_state to HSM_ST_ERR.
5212 * For PIO writes, ERR=1 DRQ=1 doesn't make
5213 * sense since the data block has been
5214 * transferred to the device.
5216 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5217 /* data might be corrputed */
5218 qc
->err_mask
|= AC_ERR_DEV
;
5220 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5221 ata_pio_sectors(qc
);
5222 status
= ata_wait_idle(ap
);
5225 if (status
& (ATA_BUSY
| ATA_DRQ
))
5226 qc
->err_mask
|= AC_ERR_HSM
;
5228 /* ata_pio_sectors() might change the
5229 * state to HSM_ST_LAST. so, the state
5230 * is changed after ata_pio_sectors().
5232 ap
->hsm_task_state
= HSM_ST_ERR
;
5236 ata_pio_sectors(qc
);
5238 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5239 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5241 status
= ata_wait_idle(ap
);
5250 if (unlikely(!ata_ok(status
))) {
5251 qc
->err_mask
|= __ac_err_mask(status
);
5252 ap
->hsm_task_state
= HSM_ST_ERR
;
5256 /* no more data to transfer */
5257 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5258 ap
->print_id
, qc
->dev
->devno
, status
);
5260 WARN_ON(qc
->err_mask
);
5262 ap
->hsm_task_state
= HSM_ST_IDLE
;
5264 /* complete taskfile transaction */
5265 ata_hsm_qc_complete(qc
, in_wq
);
5271 /* make sure qc->err_mask is available to
5272 * know what's wrong and recover
5274 WARN_ON(qc
->err_mask
== 0);
5276 ap
->hsm_task_state
= HSM_ST_IDLE
;
5278 /* complete taskfile transaction */
5279 ata_hsm_qc_complete(qc
, in_wq
);
5291 static void ata_pio_task(struct work_struct
*work
)
5293 struct ata_port
*ap
=
5294 container_of(work
, struct ata_port
, port_task
.work
);
5295 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5300 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5303 * This is purely heuristic. This is a fast path.
5304 * Sometimes when we enter, BSY will be cleared in
5305 * a chk-status or two. If not, the drive is probably seeking
5306 * or something. Snooze for a couple msecs, then
5307 * chk-status again. If still busy, queue delayed work.
5309 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5310 if (status
& ATA_BUSY
) {
5312 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5313 if (status
& ATA_BUSY
) {
5314 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5320 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5322 /* another command or interrupt handler
5323 * may be running at this point.
5330 * ata_qc_new - Request an available ATA command, for queueing
5331 * @ap: Port associated with device @dev
5332 * @dev: Device from whom we request an available command structure
5338 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5340 struct ata_queued_cmd
*qc
= NULL
;
5343 /* no command while frozen */
5344 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5347 /* the last tag is reserved for internal command. */
5348 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5349 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5350 qc
= __ata_qc_from_tag(ap
, i
);
5361 * ata_qc_new_init - Request an available ATA command, and initialize it
5362 * @dev: Device from whom we request an available command structure
5368 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5370 struct ata_port
*ap
= dev
->link
->ap
;
5371 struct ata_queued_cmd
*qc
;
5373 qc
= ata_qc_new(ap
);
5386 * ata_qc_free - free unused ata_queued_cmd
5387 * @qc: Command to complete
5389 * Designed to free unused ata_queued_cmd object
5390 * in case something prevents using it.
5393 * spin_lock_irqsave(host lock)
5395 void ata_qc_free(struct ata_queued_cmd
*qc
)
5397 struct ata_port
*ap
= qc
->ap
;
5400 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5404 if (likely(ata_tag_valid(tag
))) {
5405 qc
->tag
= ATA_TAG_POISON
;
5406 clear_bit(tag
, &ap
->qc_allocated
);
5410 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5412 struct ata_port
*ap
= qc
->ap
;
5413 struct ata_link
*link
= qc
->dev
->link
;
5415 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5416 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5418 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5421 /* command should be marked inactive atomically with qc completion */
5422 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5423 link
->sactive
&= ~(1 << qc
->tag
);
5425 ap
->nr_active_links
--;
5427 link
->active_tag
= ATA_TAG_POISON
;
5428 ap
->nr_active_links
--;
5431 /* clear exclusive status */
5432 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5433 ap
->excl_link
== link
))
5434 ap
->excl_link
= NULL
;
5436 /* atapi: mark qc as inactive to prevent the interrupt handler
5437 * from completing the command twice later, before the error handler
5438 * is called. (when rc != 0 and atapi request sense is needed)
5440 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5441 ap
->qc_active
&= ~(1 << qc
->tag
);
5443 /* call completion callback */
5444 qc
->complete_fn(qc
);
5447 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5449 struct ata_port
*ap
= qc
->ap
;
5451 qc
->result_tf
.flags
= qc
->tf
.flags
;
5452 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5456 * ata_qc_complete - Complete an active ATA command
5457 * @qc: Command to complete
5458 * @err_mask: ATA Status register contents
5460 * Indicate to the mid and upper layers that an ATA
5461 * command has completed, with either an ok or not-ok status.
5464 * spin_lock_irqsave(host lock)
5466 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5468 struct ata_port
*ap
= qc
->ap
;
5470 /* XXX: New EH and old EH use different mechanisms to
5471 * synchronize EH with regular execution path.
5473 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5474 * Normal execution path is responsible for not accessing a
5475 * failed qc. libata core enforces the rule by returning NULL
5476 * from ata_qc_from_tag() for failed qcs.
5478 * Old EH depends on ata_qc_complete() nullifying completion
5479 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5480 * not synchronize with interrupt handler. Only PIO task is
5483 if (ap
->ops
->error_handler
) {
5484 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5486 if (unlikely(qc
->err_mask
))
5487 qc
->flags
|= ATA_QCFLAG_FAILED
;
5489 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5490 if (!ata_tag_internal(qc
->tag
)) {
5491 /* always fill result TF for failed qc */
5493 ata_qc_schedule_eh(qc
);
5498 /* read result TF if requested */
5499 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5502 __ata_qc_complete(qc
);
5504 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5507 /* read result TF if failed or requested */
5508 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5511 __ata_qc_complete(qc
);
5516 * ata_qc_complete_multiple - Complete multiple qcs successfully
5517 * @ap: port in question
5518 * @qc_active: new qc_active mask
5519 * @finish_qc: LLDD callback invoked before completing a qc
5521 * Complete in-flight commands. This functions is meant to be
5522 * called from low-level driver's interrupt routine to complete
5523 * requests normally. ap->qc_active and @qc_active is compared
5524 * and commands are completed accordingly.
5527 * spin_lock_irqsave(host lock)
5530 * Number of completed commands on success, -errno otherwise.
5532 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5533 void (*finish_qc
)(struct ata_queued_cmd
*))
5539 done_mask
= ap
->qc_active
^ qc_active
;
5541 if (unlikely(done_mask
& qc_active
)) {
5542 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5543 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5547 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5548 struct ata_queued_cmd
*qc
;
5550 if (!(done_mask
& (1 << i
)))
5553 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5556 ata_qc_complete(qc
);
5564 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5566 struct ata_port
*ap
= qc
->ap
;
5568 switch (qc
->tf
.protocol
) {
5571 case ATA_PROT_ATAPI_DMA
:
5574 case ATA_PROT_ATAPI
:
5576 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5589 * ata_qc_issue - issue taskfile to device
5590 * @qc: command to issue to device
5592 * Prepare an ATA command to submission to device.
5593 * This includes mapping the data into a DMA-able
5594 * area, filling in the S/G table, and finally
5595 * writing the taskfile to hardware, starting the command.
5598 * spin_lock_irqsave(host lock)
5600 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5602 struct ata_port
*ap
= qc
->ap
;
5603 struct ata_link
*link
= qc
->dev
->link
;
5605 /* Make sure only one non-NCQ command is outstanding. The
5606 * check is skipped for old EH because it reuses active qc to
5607 * request ATAPI sense.
5609 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5611 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5612 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5615 ap
->nr_active_links
++;
5616 link
->sactive
|= 1 << qc
->tag
;
5618 WARN_ON(link
->sactive
);
5620 ap
->nr_active_links
++;
5621 link
->active_tag
= qc
->tag
;
5624 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5625 ap
->qc_active
|= 1 << qc
->tag
;
5627 if (ata_should_dma_map(qc
)) {
5628 if (qc
->flags
& ATA_QCFLAG_SG
) {
5629 if (ata_sg_setup(qc
))
5631 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5632 if (ata_sg_setup_one(qc
))
5636 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5639 ap
->ops
->qc_prep(qc
);
5641 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5642 if (unlikely(qc
->err_mask
))
5647 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5648 qc
->err_mask
|= AC_ERR_SYSTEM
;
5650 ata_qc_complete(qc
);
5654 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5655 * @qc: command to issue to device
5657 * Using various libata functions and hooks, this function
5658 * starts an ATA command. ATA commands are grouped into
5659 * classes called "protocols", and issuing each type of protocol
5660 * is slightly different.
5662 * May be used as the qc_issue() entry in ata_port_operations.
5665 * spin_lock_irqsave(host lock)
5668 * Zero on success, AC_ERR_* mask on failure
5671 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5673 struct ata_port
*ap
= qc
->ap
;
5675 /* Use polling pio if the LLD doesn't handle
5676 * interrupt driven pio and atapi CDB interrupt.
5678 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5679 switch (qc
->tf
.protocol
) {
5681 case ATA_PROT_NODATA
:
5682 case ATA_PROT_ATAPI
:
5683 case ATA_PROT_ATAPI_NODATA
:
5684 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5686 case ATA_PROT_ATAPI_DMA
:
5687 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5688 /* see ata_dma_blacklisted() */
5696 /* select the device */
5697 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5699 /* start the command */
5700 switch (qc
->tf
.protocol
) {
5701 case ATA_PROT_NODATA
:
5702 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5703 ata_qc_set_polling(qc
);
5705 ata_tf_to_host(ap
, &qc
->tf
);
5706 ap
->hsm_task_state
= HSM_ST_LAST
;
5708 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5709 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5714 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5716 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5717 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5718 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5719 ap
->hsm_task_state
= HSM_ST_LAST
;
5723 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5724 ata_qc_set_polling(qc
);
5726 ata_tf_to_host(ap
, &qc
->tf
);
5728 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5729 /* PIO data out protocol */
5730 ap
->hsm_task_state
= HSM_ST_FIRST
;
5731 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5733 /* always send first data block using
5734 * the ata_pio_task() codepath.
5737 /* PIO data in protocol */
5738 ap
->hsm_task_state
= HSM_ST
;
5740 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5741 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5743 /* if polling, ata_pio_task() handles the rest.
5744 * otherwise, interrupt handler takes over from here.
5750 case ATA_PROT_ATAPI
:
5751 case ATA_PROT_ATAPI_NODATA
:
5752 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5753 ata_qc_set_polling(qc
);
5755 ata_tf_to_host(ap
, &qc
->tf
);
5757 ap
->hsm_task_state
= HSM_ST_FIRST
;
5759 /* send cdb by polling if no cdb interrupt */
5760 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5761 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5762 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5765 case ATA_PROT_ATAPI_DMA
:
5766 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5768 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5769 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5770 ap
->hsm_task_state
= HSM_ST_FIRST
;
5772 /* send cdb by polling if no cdb interrupt */
5773 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5774 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5779 return AC_ERR_SYSTEM
;
5786 * ata_host_intr - Handle host interrupt for given (port, task)
5787 * @ap: Port on which interrupt arrived (possibly...)
5788 * @qc: Taskfile currently active in engine
5790 * Handle host interrupt for given queued command. Currently,
5791 * only DMA interrupts are handled. All other commands are
5792 * handled via polling with interrupts disabled (nIEN bit).
5795 * spin_lock_irqsave(host lock)
5798 * One if interrupt was handled, zero if not (shared irq).
5801 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5802 struct ata_queued_cmd
*qc
)
5804 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5805 u8 status
, host_stat
= 0;
5807 VPRINTK("ata%u: protocol %d task_state %d\n",
5808 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5810 /* Check whether we are expecting interrupt in this state */
5811 switch (ap
->hsm_task_state
) {
5813 /* Some pre-ATAPI-4 devices assert INTRQ
5814 * at this state when ready to receive CDB.
5817 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5818 * The flag was turned on only for atapi devices.
5819 * No need to check is_atapi_taskfile(&qc->tf) again.
5821 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5825 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5826 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5827 /* check status of DMA engine */
5828 host_stat
= ap
->ops
->bmdma_status(ap
);
5829 VPRINTK("ata%u: host_stat 0x%X\n",
5830 ap
->print_id
, host_stat
);
5832 /* if it's not our irq... */
5833 if (!(host_stat
& ATA_DMA_INTR
))
5836 /* before we do anything else, clear DMA-Start bit */
5837 ap
->ops
->bmdma_stop(qc
);
5839 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5840 /* error when transfering data to/from memory */
5841 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5842 ap
->hsm_task_state
= HSM_ST_ERR
;
5852 /* check altstatus */
5853 status
= ata_altstatus(ap
);
5854 if (status
& ATA_BUSY
)
5857 /* check main status, clearing INTRQ */
5858 status
= ata_chk_status(ap
);
5859 if (unlikely(status
& ATA_BUSY
))
5862 /* ack bmdma irq events */
5863 ap
->ops
->irq_clear(ap
);
5865 ata_hsm_move(ap
, qc
, status
, 0);
5867 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5868 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5869 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5871 return 1; /* irq handled */
5874 ap
->stats
.idle_irq
++;
5877 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5879 ap
->ops
->irq_clear(ap
);
5880 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5884 return 0; /* irq not handled */
5888 * ata_interrupt - Default ATA host interrupt handler
5889 * @irq: irq line (unused)
5890 * @dev_instance: pointer to our ata_host information structure
5892 * Default interrupt handler for PCI IDE devices. Calls
5893 * ata_host_intr() for each port that is not disabled.
5896 * Obtains host lock during operation.
5899 * IRQ_NONE or IRQ_HANDLED.
5902 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5904 struct ata_host
*host
= dev_instance
;
5906 unsigned int handled
= 0;
5907 unsigned long flags
;
5909 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5910 spin_lock_irqsave(&host
->lock
, flags
);
5912 for (i
= 0; i
< host
->n_ports
; i
++) {
5913 struct ata_port
*ap
;
5915 ap
= host
->ports
[i
];
5917 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5918 struct ata_queued_cmd
*qc
;
5920 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
5921 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5922 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5923 handled
|= ata_host_intr(ap
, qc
);
5927 spin_unlock_irqrestore(&host
->lock
, flags
);
5929 return IRQ_RETVAL(handled
);
5933 * sata_scr_valid - test whether SCRs are accessible
5934 * @link: ATA link to test SCR accessibility for
5936 * Test whether SCRs are accessible for @link.
5942 * 1 if SCRs are accessible, 0 otherwise.
5944 int sata_scr_valid(struct ata_link
*link
)
5946 struct ata_port
*ap
= link
->ap
;
5948 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5952 * sata_scr_read - read SCR register of the specified port
5953 * @link: ATA link to read SCR for
5955 * @val: Place to store read value
5957 * Read SCR register @reg of @link into *@val. This function is
5958 * guaranteed to succeed if the cable type of the port is SATA
5959 * and the port implements ->scr_read.
5965 * 0 on success, negative errno on failure.
5967 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5969 struct ata_port
*ap
= link
->ap
;
5971 if (sata_scr_valid(link
))
5972 return ap
->ops
->scr_read(ap
, reg
, val
);
5977 * sata_scr_write - write SCR register of the specified port
5978 * @link: ATA link to write SCR for
5979 * @reg: SCR to write
5980 * @val: value to write
5982 * Write @val to SCR register @reg of @link. This function is
5983 * guaranteed to succeed if the cable type of the port is SATA
5984 * and the port implements ->scr_read.
5990 * 0 on success, negative errno on failure.
5992 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5994 struct ata_port
*ap
= link
->ap
;
5996 if (sata_scr_valid(link
))
5997 return ap
->ops
->scr_write(ap
, reg
, val
);
6002 * sata_scr_write_flush - write SCR register of the specified port and flush
6003 * @link: ATA link to write SCR for
6004 * @reg: SCR to write
6005 * @val: value to write
6007 * This function is identical to sata_scr_write() except that this
6008 * function performs flush after writing to the register.
6014 * 0 on success, negative errno on failure.
6016 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6018 struct ata_port
*ap
= link
->ap
;
6021 if (sata_scr_valid(link
)) {
6022 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6024 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6031 * ata_link_online - test whether the given link is online
6032 * @link: ATA link to test
6034 * Test whether @link is online. Note that this function returns
6035 * 0 if online status of @link cannot be obtained, so
6036 * ata_link_online(link) != !ata_link_offline(link).
6042 * 1 if the port online status is available and online.
6044 int ata_link_online(struct ata_link
*link
)
6048 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6049 (sstatus
& 0xf) == 0x3)
6055 * ata_link_offline - test whether the given link is offline
6056 * @link: ATA link to test
6058 * Test whether @link is offline. Note that this function
6059 * returns 0 if offline status of @link cannot be obtained, so
6060 * ata_link_online(link) != !ata_link_offline(link).
6066 * 1 if the port offline status is available and offline.
6068 int ata_link_offline(struct ata_link
*link
)
6072 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6073 (sstatus
& 0xf) != 0x3)
6078 int ata_flush_cache(struct ata_device
*dev
)
6080 unsigned int err_mask
;
6083 if (!ata_try_flush_cache(dev
))
6086 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6087 cmd
= ATA_CMD_FLUSH_EXT
;
6089 cmd
= ATA_CMD_FLUSH
;
6091 /* This is wrong. On a failed flush we get back the LBA of the lost
6092 sector and we should (assuming it wasn't aborted as unknown) issue
6093 a further flush command to continue the writeback until it
6095 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6097 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6105 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6106 unsigned int action
, unsigned int ehi_flags
,
6109 unsigned long flags
;
6112 for (i
= 0; i
< host
->n_ports
; i
++) {
6113 struct ata_port
*ap
= host
->ports
[i
];
6114 struct ata_link
*link
;
6116 /* Previous resume operation might still be in
6117 * progress. Wait for PM_PENDING to clear.
6119 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6120 ata_port_wait_eh(ap
);
6121 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6124 /* request PM ops to EH */
6125 spin_lock_irqsave(ap
->lock
, flags
);
6130 ap
->pm_result
= &rc
;
6133 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6134 __ata_port_for_each_link(link
, ap
) {
6135 link
->eh_info
.action
|= action
;
6136 link
->eh_info
.flags
|= ehi_flags
;
6139 ata_port_schedule_eh(ap
);
6141 spin_unlock_irqrestore(ap
->lock
, flags
);
6143 /* wait and check result */
6145 ata_port_wait_eh(ap
);
6146 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6156 * ata_host_suspend - suspend host
6157 * @host: host to suspend
6160 * Suspend @host. Actual operation is performed by EH. This
6161 * function requests EH to perform PM operations and waits for EH
6165 * Kernel thread context (may sleep).
6168 * 0 on success, -errno on failure.
6170 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6174 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6176 host
->dev
->power
.power_state
= mesg
;
6181 * ata_host_resume - resume host
6182 * @host: host to resume
6184 * Resume @host. Actual operation is performed by EH. This
6185 * function requests EH to perform PM operations and returns.
6186 * Note that all resume operations are performed parallely.
6189 * Kernel thread context (may sleep).
6191 void ata_host_resume(struct ata_host
*host
)
6193 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6194 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6195 host
->dev
->power
.power_state
= PMSG_ON
;
6200 * ata_port_start - Set port up for dma.
6201 * @ap: Port to initialize
6203 * Called just after data structures for each port are
6204 * initialized. Allocates space for PRD table.
6206 * May be used as the port_start() entry in ata_port_operations.
6209 * Inherited from caller.
6211 int ata_port_start(struct ata_port
*ap
)
6213 struct device
*dev
= ap
->dev
;
6216 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6221 rc
= ata_pad_alloc(ap
, dev
);
6225 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6226 (unsigned long long)ap
->prd_dma
);
6231 * ata_dev_init - Initialize an ata_device structure
6232 * @dev: Device structure to initialize
6234 * Initialize @dev in preparation for probing.
6237 * Inherited from caller.
6239 void ata_dev_init(struct ata_device
*dev
)
6241 struct ata_link
*link
= dev
->link
;
6242 struct ata_port
*ap
= link
->ap
;
6243 unsigned long flags
;
6245 /* SATA spd limit is bound to the first device */
6246 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6249 /* High bits of dev->flags are used to record warm plug
6250 * requests which occur asynchronously. Synchronize using
6253 spin_lock_irqsave(ap
->lock
, flags
);
6254 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6256 spin_unlock_irqrestore(ap
->lock
, flags
);
6258 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6259 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6260 dev
->pio_mask
= UINT_MAX
;
6261 dev
->mwdma_mask
= UINT_MAX
;
6262 dev
->udma_mask
= UINT_MAX
;
6266 * ata_link_init - Initialize an ata_link structure
6267 * @ap: ATA port link is attached to
6268 * @link: Link structure to initialize
6269 * @pmp: Port multiplier port number
6274 * Kernel thread context (may sleep)
6276 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6280 /* clear everything except for devices */
6281 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6285 link
->active_tag
= ATA_TAG_POISON
;
6286 link
->hw_sata_spd_limit
= UINT_MAX
;
6288 /* can't use iterator, ap isn't initialized yet */
6289 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6290 struct ata_device
*dev
= &link
->device
[i
];
6293 dev
->devno
= dev
- link
->device
;
6299 * sata_link_init_spd - Initialize link->sata_spd_limit
6300 * @link: Link to configure sata_spd_limit for
6302 * Initialize @link->[hw_]sata_spd_limit to the currently
6306 * Kernel thread context (may sleep).
6309 * 0 on success, -errno on failure.
6311 int sata_link_init_spd(struct ata_link
*link
)
6316 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6320 spd
= (scontrol
>> 4) & 0xf;
6322 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6324 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6330 * ata_port_alloc - allocate and initialize basic ATA port resources
6331 * @host: ATA host this allocated port belongs to
6333 * Allocate and initialize basic ATA port resources.
6336 * Allocate ATA port on success, NULL on failure.
6339 * Inherited from calling layer (may sleep).
6341 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6343 struct ata_port
*ap
;
6347 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6351 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6352 ap
->lock
= &host
->lock
;
6353 ap
->flags
= ATA_FLAG_DISABLED
;
6355 ap
->ctl
= ATA_DEVCTL_OBS
;
6357 ap
->dev
= host
->dev
;
6358 ap
->last_ctl
= 0xFF;
6360 #if defined(ATA_VERBOSE_DEBUG)
6361 /* turn on all debugging levels */
6362 ap
->msg_enable
= 0x00FF;
6363 #elif defined(ATA_DEBUG)
6364 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6366 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6369 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6370 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6371 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6372 INIT_LIST_HEAD(&ap
->eh_done_q
);
6373 init_waitqueue_head(&ap
->eh_wait_q
);
6374 init_timer_deferrable(&ap
->fastdrain_timer
);
6375 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6376 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6378 ap
->cbl
= ATA_CBL_NONE
;
6380 ata_link_init(ap
, &ap
->link
, 0);
6383 ap
->stats
.unhandled_irq
= 1;
6384 ap
->stats
.idle_irq
= 1;
6389 static void ata_host_release(struct device
*gendev
, void *res
)
6391 struct ata_host
*host
= dev_get_drvdata(gendev
);
6394 for (i
= 0; i
< host
->n_ports
; i
++) {
6395 struct ata_port
*ap
= host
->ports
[i
];
6400 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6401 ap
->ops
->port_stop(ap
);
6404 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6405 host
->ops
->host_stop(host
);
6407 for (i
= 0; i
< host
->n_ports
; i
++) {
6408 struct ata_port
*ap
= host
->ports
[i
];
6414 scsi_host_put(ap
->scsi_host
);
6417 host
->ports
[i
] = NULL
;
6420 dev_set_drvdata(gendev
, NULL
);
6424 * ata_host_alloc - allocate and init basic ATA host resources
6425 * @dev: generic device this host is associated with
6426 * @max_ports: maximum number of ATA ports associated with this host
6428 * Allocate and initialize basic ATA host resources. LLD calls
6429 * this function to allocate a host, initializes it fully and
6430 * attaches it using ata_host_register().
6432 * @max_ports ports are allocated and host->n_ports is
6433 * initialized to @max_ports. The caller is allowed to decrease
6434 * host->n_ports before calling ata_host_register(). The unused
6435 * ports will be automatically freed on registration.
6438 * Allocate ATA host on success, NULL on failure.
6441 * Inherited from calling layer (may sleep).
6443 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6445 struct ata_host
*host
;
6451 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6454 /* alloc a container for our list of ATA ports (buses) */
6455 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6456 /* alloc a container for our list of ATA ports (buses) */
6457 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6461 devres_add(dev
, host
);
6462 dev_set_drvdata(dev
, host
);
6464 spin_lock_init(&host
->lock
);
6466 host
->n_ports
= max_ports
;
6468 /* allocate ports bound to this host */
6469 for (i
= 0; i
< max_ports
; i
++) {
6470 struct ata_port
*ap
;
6472 ap
= ata_port_alloc(host
);
6477 host
->ports
[i
] = ap
;
6480 devres_remove_group(dev
, NULL
);
6484 devres_release_group(dev
, NULL
);
6489 * ata_host_alloc_pinfo - alloc host and init with port_info array
6490 * @dev: generic device this host is associated with
6491 * @ppi: array of ATA port_info to initialize host with
6492 * @n_ports: number of ATA ports attached to this host
6494 * Allocate ATA host and initialize with info from @ppi. If NULL
6495 * terminated, @ppi may contain fewer entries than @n_ports. The
6496 * last entry will be used for the remaining ports.
6499 * Allocate ATA host on success, NULL on failure.
6502 * Inherited from calling layer (may sleep).
6504 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6505 const struct ata_port_info
* const * ppi
,
6508 const struct ata_port_info
*pi
;
6509 struct ata_host
*host
;
6512 host
= ata_host_alloc(dev
, n_ports
);
6516 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6517 struct ata_port
*ap
= host
->ports
[i
];
6522 ap
->pio_mask
= pi
->pio_mask
;
6523 ap
->mwdma_mask
= pi
->mwdma_mask
;
6524 ap
->udma_mask
= pi
->udma_mask
;
6525 ap
->flags
|= pi
->flags
;
6526 ap
->link
.flags
|= pi
->link_flags
;
6527 ap
->ops
= pi
->port_ops
;
6529 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6530 host
->ops
= pi
->port_ops
;
6531 if (!host
->private_data
&& pi
->private_data
)
6532 host
->private_data
= pi
->private_data
;
6539 * ata_host_start - start and freeze ports of an ATA host
6540 * @host: ATA host to start ports for
6542 * Start and then freeze ports of @host. Started status is
6543 * recorded in host->flags, so this function can be called
6544 * multiple times. Ports are guaranteed to get started only
6545 * once. If host->ops isn't initialized yet, its set to the
6546 * first non-dummy port ops.
6549 * Inherited from calling layer (may sleep).
6552 * 0 if all ports are started successfully, -errno otherwise.
6554 int ata_host_start(struct ata_host
*host
)
6558 if (host
->flags
& ATA_HOST_STARTED
)
6561 for (i
= 0; i
< host
->n_ports
; i
++) {
6562 struct ata_port
*ap
= host
->ports
[i
];
6564 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6565 host
->ops
= ap
->ops
;
6567 if (ap
->ops
->port_start
) {
6568 rc
= ap
->ops
->port_start(ap
);
6570 ata_port_printk(ap
, KERN_ERR
, "failed to "
6571 "start port (errno=%d)\n", rc
);
6576 ata_eh_freeze_port(ap
);
6579 host
->flags
|= ATA_HOST_STARTED
;
6584 struct ata_port
*ap
= host
->ports
[i
];
6586 if (ap
->ops
->port_stop
)
6587 ap
->ops
->port_stop(ap
);
6593 * ata_sas_host_init - Initialize a host struct
6594 * @host: host to initialize
6595 * @dev: device host is attached to
6596 * @flags: host flags
6600 * PCI/etc. bus probe sem.
6603 /* KILLME - the only user left is ipr */
6604 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6605 unsigned long flags
, const struct ata_port_operations
*ops
)
6607 spin_lock_init(&host
->lock
);
6609 host
->flags
= flags
;
6614 * ata_host_register - register initialized ATA host
6615 * @host: ATA host to register
6616 * @sht: template for SCSI host
6618 * Register initialized ATA host. @host is allocated using
6619 * ata_host_alloc() and fully initialized by LLD. This function
6620 * starts ports, registers @host with ATA and SCSI layers and
6621 * probe registered devices.
6624 * Inherited from calling layer (may sleep).
6627 * 0 on success, -errno otherwise.
6629 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6633 /* host must have been started */
6634 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6635 dev_printk(KERN_ERR
, host
->dev
,
6636 "BUG: trying to register unstarted host\n");
6641 /* Blow away unused ports. This happens when LLD can't
6642 * determine the exact number of ports to allocate at
6645 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6646 kfree(host
->ports
[i
]);
6648 /* give ports names and add SCSI hosts */
6649 for (i
= 0; i
< host
->n_ports
; i
++)
6650 host
->ports
[i
]->print_id
= ata_print_id
++;
6652 rc
= ata_scsi_add_hosts(host
, sht
);
6656 /* associate with ACPI nodes */
6657 ata_acpi_associate(host
);
6659 /* set cable, sata_spd_limit and report */
6660 for (i
= 0; i
< host
->n_ports
; i
++) {
6661 struct ata_port
*ap
= host
->ports
[i
];
6662 unsigned long xfer_mask
;
6664 /* set SATA cable type if still unset */
6665 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6666 ap
->cbl
= ATA_CBL_SATA
;
6668 /* init sata_spd_limit to the current value */
6669 sata_link_init_spd(&ap
->link
);
6671 /* print per-port info to dmesg */
6672 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6675 if (!ata_port_is_dummy(ap
))
6676 ata_port_printk(ap
, KERN_INFO
,
6677 "%cATA max %s %s\n",
6678 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6679 ata_mode_string(xfer_mask
),
6680 ap
->link
.eh_info
.desc
);
6682 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6685 /* perform each probe synchronously */
6686 DPRINTK("probe begin\n");
6687 for (i
= 0; i
< host
->n_ports
; i
++) {
6688 struct ata_port
*ap
= host
->ports
[i
];
6692 if (ap
->ops
->error_handler
) {
6693 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6694 unsigned long flags
;
6698 /* kick EH for boot probing */
6699 spin_lock_irqsave(ap
->lock
, flags
);
6702 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6703 ehi
->action
|= ATA_EH_SOFTRESET
;
6704 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6706 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6707 ap
->pflags
|= ATA_PFLAG_LOADING
;
6708 ata_port_schedule_eh(ap
);
6710 spin_unlock_irqrestore(ap
->lock
, flags
);
6712 /* wait for EH to finish */
6713 ata_port_wait_eh(ap
);
6715 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6716 rc
= ata_bus_probe(ap
);
6717 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6720 /* FIXME: do something useful here?
6721 * Current libata behavior will
6722 * tear down everything when
6723 * the module is removed
6724 * or the h/w is unplugged.
6730 /* probes are done, now scan each port's disk(s) */
6731 DPRINTK("host probe begin\n");
6732 for (i
= 0; i
< host
->n_ports
; i
++) {
6733 struct ata_port
*ap
= host
->ports
[i
];
6735 ata_scsi_scan_host(ap
, 1);
6742 * ata_host_activate - start host, request IRQ and register it
6743 * @host: target ATA host
6744 * @irq: IRQ to request
6745 * @irq_handler: irq_handler used when requesting IRQ
6746 * @irq_flags: irq_flags used when requesting IRQ
6747 * @sht: scsi_host_template to use when registering the host
6749 * After allocating an ATA host and initializing it, most libata
6750 * LLDs perform three steps to activate the host - start host,
6751 * request IRQ and register it. This helper takes necessasry
6752 * arguments and performs the three steps in one go.
6755 * Inherited from calling layer (may sleep).
6758 * 0 on success, -errno otherwise.
6760 int ata_host_activate(struct ata_host
*host
, int irq
,
6761 irq_handler_t irq_handler
, unsigned long irq_flags
,
6762 struct scsi_host_template
*sht
)
6766 rc
= ata_host_start(host
);
6770 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6771 dev_driver_string(host
->dev
), host
);
6775 for (i
= 0; i
< host
->n_ports
; i
++)
6776 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6778 rc
= ata_host_register(host
, sht
);
6779 /* if failed, just free the IRQ and leave ports alone */
6781 devm_free_irq(host
->dev
, irq
, host
);
6787 * ata_port_detach - Detach ATA port in prepration of device removal
6788 * @ap: ATA port to be detached
6790 * Detach all ATA devices and the associated SCSI devices of @ap;
6791 * then, remove the associated SCSI host. @ap is guaranteed to
6792 * be quiescent on return from this function.
6795 * Kernel thread context (may sleep).
6797 void ata_port_detach(struct ata_port
*ap
)
6799 unsigned long flags
;
6800 struct ata_link
*link
;
6801 struct ata_device
*dev
;
6803 if (!ap
->ops
->error_handler
)
6806 /* tell EH we're leaving & flush EH */
6807 spin_lock_irqsave(ap
->lock
, flags
);
6808 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6809 spin_unlock_irqrestore(ap
->lock
, flags
);
6811 ata_port_wait_eh(ap
);
6813 /* EH is now guaranteed to see UNLOADING, so no new device
6814 * will be attached. Disable all existing devices.
6816 spin_lock_irqsave(ap
->lock
, flags
);
6818 ata_port_for_each_link(link
, ap
) {
6819 ata_link_for_each_dev(dev
, link
)
6820 ata_dev_disable(dev
);
6823 spin_unlock_irqrestore(ap
->lock
, flags
);
6825 /* Final freeze & EH. All in-flight commands are aborted. EH
6826 * will be skipped and retrials will be terminated with bad
6829 spin_lock_irqsave(ap
->lock
, flags
);
6830 ata_port_freeze(ap
); /* won't be thawed */
6831 spin_unlock_irqrestore(ap
->lock
, flags
);
6833 ata_port_wait_eh(ap
);
6834 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6837 /* remove the associated SCSI host */
6838 scsi_remove_host(ap
->scsi_host
);
6842 * ata_host_detach - Detach all ports of an ATA host
6843 * @host: Host to detach
6845 * Detach all ports of @host.
6848 * Kernel thread context (may sleep).
6850 void ata_host_detach(struct ata_host
*host
)
6854 for (i
= 0; i
< host
->n_ports
; i
++)
6855 ata_port_detach(host
->ports
[i
]);
6859 * ata_std_ports - initialize ioaddr with standard port offsets.
6860 * @ioaddr: IO address structure to be initialized
6862 * Utility function which initializes data_addr, error_addr,
6863 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6864 * device_addr, status_addr, and command_addr to standard offsets
6865 * relative to cmd_addr.
6867 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6870 void ata_std_ports(struct ata_ioports
*ioaddr
)
6872 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6873 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6874 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6875 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6876 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6877 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6878 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6879 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6880 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6881 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6888 * ata_pci_remove_one - PCI layer callback for device removal
6889 * @pdev: PCI device that was removed
6891 * PCI layer indicates to libata via this hook that hot-unplug or
6892 * module unload event has occurred. Detach all ports. Resource
6893 * release is handled via devres.
6896 * Inherited from PCI layer (may sleep).
6898 void ata_pci_remove_one(struct pci_dev
*pdev
)
6900 struct device
*dev
= pci_dev_to_dev(pdev
);
6901 struct ata_host
*host
= dev_get_drvdata(dev
);
6903 ata_host_detach(host
);
6906 /* move to PCI subsystem */
6907 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6909 unsigned long tmp
= 0;
6911 switch (bits
->width
) {
6914 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6920 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6926 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6937 return (tmp
== bits
->val
) ? 1 : 0;
6941 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6943 pci_save_state(pdev
);
6944 pci_disable_device(pdev
);
6946 if (mesg
.event
== PM_EVENT_SUSPEND
)
6947 pci_set_power_state(pdev
, PCI_D3hot
);
6950 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6954 pci_set_power_state(pdev
, PCI_D0
);
6955 pci_restore_state(pdev
);
6957 rc
= pcim_enable_device(pdev
);
6959 dev_printk(KERN_ERR
, &pdev
->dev
,
6960 "failed to enable device after resume (%d)\n", rc
);
6964 pci_set_master(pdev
);
6968 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6970 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6973 rc
= ata_host_suspend(host
, mesg
);
6977 ata_pci_device_do_suspend(pdev
, mesg
);
6982 int ata_pci_device_resume(struct pci_dev
*pdev
)
6984 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6987 rc
= ata_pci_device_do_resume(pdev
);
6989 ata_host_resume(host
);
6992 #endif /* CONFIG_PM */
6994 #endif /* CONFIG_PCI */
6997 static int __init
ata_init(void)
6999 ata_probe_timeout
*= HZ
;
7000 ata_wq
= create_workqueue("ata");
7004 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7006 destroy_workqueue(ata_wq
);
7010 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7014 static void __exit
ata_exit(void)
7016 destroy_workqueue(ata_wq
);
7017 destroy_workqueue(ata_aux_wq
);
7020 subsys_initcall(ata_init
);
7021 module_exit(ata_exit
);
7023 static unsigned long ratelimit_time
;
7024 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7026 int ata_ratelimit(void)
7029 unsigned long flags
;
7031 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7033 if (time_after(jiffies
, ratelimit_time
)) {
7035 ratelimit_time
= jiffies
+ (HZ
/5);
7039 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7045 * ata_wait_register - wait until register value changes
7046 * @reg: IO-mapped register
7047 * @mask: Mask to apply to read register value
7048 * @val: Wait condition
7049 * @interval_msec: polling interval in milliseconds
7050 * @timeout_msec: timeout in milliseconds
7052 * Waiting for some bits of register to change is a common
7053 * operation for ATA controllers. This function reads 32bit LE
7054 * IO-mapped register @reg and tests for the following condition.
7056 * (*@reg & mask) != val
7058 * If the condition is met, it returns; otherwise, the process is
7059 * repeated after @interval_msec until timeout.
7062 * Kernel thread context (may sleep)
7065 * The final register value.
7067 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7068 unsigned long interval_msec
,
7069 unsigned long timeout_msec
)
7071 unsigned long timeout
;
7074 tmp
= ioread32(reg
);
7076 /* Calculate timeout _after_ the first read to make sure
7077 * preceding writes reach the controller before starting to
7078 * eat away the timeout.
7080 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7082 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7083 msleep(interval_msec
);
7084 tmp
= ioread32(reg
);
7093 static void ata_dummy_noret(struct ata_port
*ap
) { }
7094 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7095 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7097 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7102 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7104 return AC_ERR_SYSTEM
;
7107 const struct ata_port_operations ata_dummy_port_ops
= {
7108 .check_status
= ata_dummy_check_status
,
7109 .check_altstatus
= ata_dummy_check_status
,
7110 .dev_select
= ata_noop_dev_select
,
7111 .qc_prep
= ata_noop_qc_prep
,
7112 .qc_issue
= ata_dummy_qc_issue
,
7113 .freeze
= ata_dummy_noret
,
7114 .thaw
= ata_dummy_noret
,
7115 .error_handler
= ata_dummy_noret
,
7116 .post_internal_cmd
= ata_dummy_qc_noret
,
7117 .irq_clear
= ata_dummy_noret
,
7118 .port_start
= ata_dummy_ret0
,
7119 .port_stop
= ata_dummy_noret
,
7122 const struct ata_port_info ata_dummy_port_info
= {
7123 .port_ops
= &ata_dummy_port_ops
,
7127 * libata is essentially a library of internal helper functions for
7128 * low-level ATA host controller drivers. As such, the API/ABI is
7129 * likely to change as new drivers are added and updated.
7130 * Do not depend on ABI/API stability.
7133 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7134 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7135 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7136 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7137 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7138 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7139 EXPORT_SYMBOL_GPL(ata_std_ports
);
7140 EXPORT_SYMBOL_GPL(ata_host_init
);
7141 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7142 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7143 EXPORT_SYMBOL_GPL(ata_host_start
);
7144 EXPORT_SYMBOL_GPL(ata_host_register
);
7145 EXPORT_SYMBOL_GPL(ata_host_activate
);
7146 EXPORT_SYMBOL_GPL(ata_host_detach
);
7147 EXPORT_SYMBOL_GPL(ata_sg_init
);
7148 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7149 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7150 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7151 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7152 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7153 EXPORT_SYMBOL_GPL(ata_tf_load
);
7154 EXPORT_SYMBOL_GPL(ata_tf_read
);
7155 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7156 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7157 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7158 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7159 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7160 EXPORT_SYMBOL_GPL(ata_check_status
);
7161 EXPORT_SYMBOL_GPL(ata_altstatus
);
7162 EXPORT_SYMBOL_GPL(ata_exec_command
);
7163 EXPORT_SYMBOL_GPL(ata_port_start
);
7164 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7165 EXPORT_SYMBOL_GPL(ata_interrupt
);
7166 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7167 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7168 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7169 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7170 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7171 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7172 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7173 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7174 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7175 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7176 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7177 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7178 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7179 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7180 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7181 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7182 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7183 EXPORT_SYMBOL_GPL(ata_port_probe
);
7184 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7185 EXPORT_SYMBOL_GPL(sata_set_spd
);
7186 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7187 EXPORT_SYMBOL_GPL(sata_link_resume
);
7188 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7189 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7190 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7191 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7192 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7193 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7194 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7195 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7196 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7197 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7198 EXPORT_SYMBOL_GPL(ata_port_disable
);
7199 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7200 EXPORT_SYMBOL_GPL(ata_wait_register
);
7201 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7202 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7203 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7204 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7205 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7206 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7207 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7208 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7209 EXPORT_SYMBOL_GPL(ata_host_intr
);
7210 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7211 EXPORT_SYMBOL_GPL(sata_scr_read
);
7212 EXPORT_SYMBOL_GPL(sata_scr_write
);
7213 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7214 EXPORT_SYMBOL_GPL(ata_link_online
);
7215 EXPORT_SYMBOL_GPL(ata_link_offline
);
7217 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7218 EXPORT_SYMBOL_GPL(ata_host_resume
);
7219 #endif /* CONFIG_PM */
7220 EXPORT_SYMBOL_GPL(ata_id_string
);
7221 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7222 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7223 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7225 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7226 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7227 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7230 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7231 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7232 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7233 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7234 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7235 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7237 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7238 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7239 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7240 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7241 #endif /* CONFIG_PM */
7242 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7243 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7244 #endif /* CONFIG_PCI */
7246 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7247 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7248 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7249 EXPORT_SYMBOL_GPL(ata_port_desc
);
7251 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7252 #endif /* CONFIG_PCI */
7253 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7254 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7255 EXPORT_SYMBOL_GPL(ata_link_abort
);
7256 EXPORT_SYMBOL_GPL(ata_port_abort
);
7257 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7258 EXPORT_SYMBOL_GPL(sata_async_notification
);
7259 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7260 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7261 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7262 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7263 EXPORT_SYMBOL_GPL(ata_do_eh
);
7264 EXPORT_SYMBOL_GPL(ata_irq_on
);
7265 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7267 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7268 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7269 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7270 EXPORT_SYMBOL_GPL(ata_cable_sata
);