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 libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
101 module_param_named(dma
, libata_dma_mask
, int, 0444);
102 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
104 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
105 module_param(ata_probe_timeout
, int, 0444);
106 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
108 int libata_noacpi
= 0;
109 module_param_named(noacpi
, libata_noacpi
, int, 0444);
110 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
112 MODULE_AUTHOR("Jeff Garzik");
113 MODULE_DESCRIPTION("Library module for ATA devices");
114 MODULE_LICENSE("GPL");
115 MODULE_VERSION(DRV_VERSION
);
119 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
120 * @tf: Taskfile to convert
121 * @pmp: Port multiplier port
122 * @is_cmd: This FIS is for command
123 * @fis: Buffer into which data will output
125 * Converts a standard ATA taskfile to a Serial ATA
126 * FIS structure (Register - Host to Device).
129 * Inherited from caller.
131 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
133 fis
[0] = 0x27; /* Register - Host to Device FIS */
134 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
136 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
138 fis
[2] = tf
->command
;
139 fis
[3] = tf
->feature
;
146 fis
[8] = tf
->hob_lbal
;
147 fis
[9] = tf
->hob_lbam
;
148 fis
[10] = tf
->hob_lbah
;
149 fis
[11] = tf
->hob_feature
;
152 fis
[13] = tf
->hob_nsect
;
163 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
164 * @fis: Buffer from which data will be input
165 * @tf: Taskfile to output
167 * Converts a serial ATA FIS structure to a standard ATA taskfile.
170 * Inherited from caller.
173 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
175 tf
->command
= fis
[2]; /* status */
176 tf
->feature
= fis
[3]; /* error */
183 tf
->hob_lbal
= fis
[8];
184 tf
->hob_lbam
= fis
[9];
185 tf
->hob_lbah
= fis
[10];
188 tf
->hob_nsect
= fis
[13];
191 static const u8 ata_rw_cmds
[] = {
195 ATA_CMD_READ_MULTI_EXT
,
196 ATA_CMD_WRITE_MULTI_EXT
,
200 ATA_CMD_WRITE_MULTI_FUA_EXT
,
204 ATA_CMD_PIO_READ_EXT
,
205 ATA_CMD_PIO_WRITE_EXT
,
218 ATA_CMD_WRITE_FUA_EXT
222 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
223 * @tf: command to examine and configure
224 * @dev: device tf belongs to
226 * Examine the device configuration and tf->flags to calculate
227 * the proper read/write commands and protocol to use.
232 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
236 int index
, fua
, lba48
, write
;
238 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
239 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
240 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
242 if (dev
->flags
& ATA_DFLAG_PIO
) {
243 tf
->protocol
= ATA_PROT_PIO
;
244 index
= dev
->multi_count
? 0 : 8;
245 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
246 /* Unable to use DMA due to host limitation */
247 tf
->protocol
= ATA_PROT_PIO
;
248 index
= dev
->multi_count
? 0 : 8;
250 tf
->protocol
= ATA_PROT_DMA
;
254 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
263 * ata_tf_read_block - Read block address from ATA taskfile
264 * @tf: ATA taskfile of interest
265 * @dev: ATA device @tf belongs to
270 * Read block address from @tf. This function can handle all
271 * three address formats - LBA, LBA48 and CHS. tf->protocol and
272 * flags select the address format to use.
275 * Block address read from @tf.
277 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
281 if (tf
->flags
& ATA_TFLAG_LBA
) {
282 if (tf
->flags
& ATA_TFLAG_LBA48
) {
283 block
|= (u64
)tf
->hob_lbah
<< 40;
284 block
|= (u64
)tf
->hob_lbam
<< 32;
285 block
|= tf
->hob_lbal
<< 24;
287 block
|= (tf
->device
& 0xf) << 24;
289 block
|= tf
->lbah
<< 16;
290 block
|= tf
->lbam
<< 8;
295 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
296 head
= tf
->device
& 0xf;
299 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
306 * ata_build_rw_tf - Build ATA taskfile for given read/write request
307 * @tf: Target ATA taskfile
308 * @dev: ATA device @tf belongs to
309 * @block: Block address
310 * @n_block: Number of blocks
311 * @tf_flags: RW/FUA etc...
317 * Build ATA taskfile @tf for read/write request described by
318 * @block, @n_block, @tf_flags and @tag on @dev.
322 * 0 on success, -ERANGE if the request is too large for @dev,
323 * -EINVAL if the request is invalid.
325 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
326 u64 block
, u32 n_block
, unsigned int tf_flags
,
329 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
330 tf
->flags
|= tf_flags
;
332 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
334 if (!lba_48_ok(block
, n_block
))
337 tf
->protocol
= ATA_PROT_NCQ
;
338 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
340 if (tf
->flags
& ATA_TFLAG_WRITE
)
341 tf
->command
= ATA_CMD_FPDMA_WRITE
;
343 tf
->command
= ATA_CMD_FPDMA_READ
;
345 tf
->nsect
= tag
<< 3;
346 tf
->hob_feature
= (n_block
>> 8) & 0xff;
347 tf
->feature
= n_block
& 0xff;
349 tf
->hob_lbah
= (block
>> 40) & 0xff;
350 tf
->hob_lbam
= (block
>> 32) & 0xff;
351 tf
->hob_lbal
= (block
>> 24) & 0xff;
352 tf
->lbah
= (block
>> 16) & 0xff;
353 tf
->lbam
= (block
>> 8) & 0xff;
354 tf
->lbal
= block
& 0xff;
357 if (tf
->flags
& ATA_TFLAG_FUA
)
358 tf
->device
|= 1 << 7;
359 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
360 tf
->flags
|= ATA_TFLAG_LBA
;
362 if (lba_28_ok(block
, n_block
)) {
364 tf
->device
|= (block
>> 24) & 0xf;
365 } else if (lba_48_ok(block
, n_block
)) {
366 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
370 tf
->flags
|= ATA_TFLAG_LBA48
;
372 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
374 tf
->hob_lbah
= (block
>> 40) & 0xff;
375 tf
->hob_lbam
= (block
>> 32) & 0xff;
376 tf
->hob_lbal
= (block
>> 24) & 0xff;
378 /* request too large even for LBA48 */
381 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
384 tf
->nsect
= n_block
& 0xff;
386 tf
->lbah
= (block
>> 16) & 0xff;
387 tf
->lbam
= (block
>> 8) & 0xff;
388 tf
->lbal
= block
& 0xff;
390 tf
->device
|= ATA_LBA
;
393 u32 sect
, head
, cyl
, track
;
395 /* The request -may- be too large for CHS addressing. */
396 if (!lba_28_ok(block
, n_block
))
399 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
402 /* Convert LBA to CHS */
403 track
= (u32
)block
/ dev
->sectors
;
404 cyl
= track
/ dev
->heads
;
405 head
= track
% dev
->heads
;
406 sect
= (u32
)block
% dev
->sectors
+ 1;
408 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
409 (u32
)block
, track
, cyl
, head
, sect
);
411 /* Check whether the converted CHS can fit.
415 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
418 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
429 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
430 * @pio_mask: pio_mask
431 * @mwdma_mask: mwdma_mask
432 * @udma_mask: udma_mask
434 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
435 * unsigned int xfer_mask.
443 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
444 unsigned int mwdma_mask
,
445 unsigned int udma_mask
)
447 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
448 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
449 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
453 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
454 * @xfer_mask: xfer_mask to unpack
455 * @pio_mask: resulting pio_mask
456 * @mwdma_mask: resulting mwdma_mask
457 * @udma_mask: resulting udma_mask
459 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
460 * Any NULL distination masks will be ignored.
462 static void ata_unpack_xfermask(unsigned int xfer_mask
,
463 unsigned int *pio_mask
,
464 unsigned int *mwdma_mask
,
465 unsigned int *udma_mask
)
468 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
470 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
472 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
475 static const struct ata_xfer_ent
{
479 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
480 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
481 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
486 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
487 * @xfer_mask: xfer_mask of interest
489 * Return matching XFER_* value for @xfer_mask. Only the highest
490 * bit of @xfer_mask is considered.
496 * Matching XFER_* value, 0 if no match found.
498 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
500 int highbit
= fls(xfer_mask
) - 1;
501 const struct ata_xfer_ent
*ent
;
503 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
504 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
505 return ent
->base
+ highbit
- ent
->shift
;
510 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
511 * @xfer_mode: XFER_* of interest
513 * Return matching xfer_mask for @xfer_mode.
519 * Matching xfer_mask, 0 if no match found.
521 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
523 const struct ata_xfer_ent
*ent
;
525 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
526 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
527 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
532 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
533 * @xfer_mode: XFER_* of interest
535 * Return matching xfer_shift for @xfer_mode.
541 * Matching xfer_shift, -1 if no match found.
543 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
545 const struct ata_xfer_ent
*ent
;
547 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
548 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
554 * ata_mode_string - convert xfer_mask to string
555 * @xfer_mask: mask of bits supported; only highest bit counts.
557 * Determine string which represents the highest speed
558 * (highest bit in @modemask).
564 * Constant C string representing highest speed listed in
565 * @mode_mask, or the constant C string "<n/a>".
567 static const char *ata_mode_string(unsigned int xfer_mask
)
569 static const char * const xfer_mode_str
[] = {
593 highbit
= fls(xfer_mask
) - 1;
594 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
595 return xfer_mode_str
[highbit
];
599 static const char *sata_spd_string(unsigned int spd
)
601 static const char * const spd_str
[] = {
606 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
608 return spd_str
[spd
- 1];
611 void ata_dev_disable(struct ata_device
*dev
)
613 if (ata_dev_enabled(dev
)) {
614 if (ata_msg_drv(dev
->link
->ap
))
615 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
616 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
623 * ata_devchk - PATA device presence detection
624 * @ap: ATA channel to examine
625 * @device: Device to examine (starting at zero)
627 * This technique was originally described in
628 * Hale Landis's ATADRVR (www.ata-atapi.com), and
629 * later found its way into the ATA/ATAPI spec.
631 * Write a pattern to the ATA shadow registers,
632 * and if a device is present, it will respond by
633 * correctly storing and echoing back the
634 * ATA shadow register contents.
640 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
642 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
645 ap
->ops
->dev_select(ap
, device
);
647 iowrite8(0x55, ioaddr
->nsect_addr
);
648 iowrite8(0xaa, ioaddr
->lbal_addr
);
650 iowrite8(0xaa, ioaddr
->nsect_addr
);
651 iowrite8(0x55, ioaddr
->lbal_addr
);
653 iowrite8(0x55, ioaddr
->nsect_addr
);
654 iowrite8(0xaa, ioaddr
->lbal_addr
);
656 nsect
= ioread8(ioaddr
->nsect_addr
);
657 lbal
= ioread8(ioaddr
->lbal_addr
);
659 if ((nsect
== 0x55) && (lbal
== 0xaa))
660 return 1; /* we found a device */
662 return 0; /* nothing found */
666 * ata_dev_classify - determine device type based on ATA-spec signature
667 * @tf: ATA taskfile register set for device to be identified
669 * Determine from taskfile register contents whether a device is
670 * ATA or ATAPI, as per "Signature and persistence" section
671 * of ATA/PI spec (volume 1, sect 5.14).
677 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
678 * %ATA_DEV_UNKNOWN the event of failure.
680 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
682 /* Apple's open source Darwin code hints that some devices only
683 * put a proper signature into the LBA mid/high registers,
684 * So, we only check those. It's sufficient for uniqueness.
686 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
687 * signatures for ATA and ATAPI devices attached on SerialATA,
688 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
689 * spec has never mentioned about using different signatures
690 * for ATA/ATAPI devices. Then, Serial ATA II: Port
691 * Multiplier specification began to use 0x69/0x96 to identify
692 * port multpliers and 0x3c/0xc3 to identify SEMB device.
693 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
694 * 0x69/0x96 shortly and described them as reserved for
697 * We follow the current spec and consider that 0x69/0x96
698 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
700 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
701 DPRINTK("found ATA device by sig\n");
705 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
706 DPRINTK("found ATAPI device by sig\n");
707 return ATA_DEV_ATAPI
;
710 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
711 DPRINTK("found PMP device by sig\n");
715 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
716 printk("ata: SEMB device ignored\n");
717 return ATA_DEV_SEMB_UNSUP
; /* not yet */
720 DPRINTK("unknown device\n");
721 return ATA_DEV_UNKNOWN
;
725 * ata_dev_try_classify - Parse returned ATA device signature
726 * @dev: ATA device to classify (starting at zero)
727 * @present: device seems present
728 * @r_err: Value of error register on completion
730 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
731 * an ATA/ATAPI-defined set of values is placed in the ATA
732 * shadow registers, indicating the results of device detection
735 * Select the ATA device, and read the values from the ATA shadow
736 * registers. Then parse according to the Error register value,
737 * and the spec-defined values examined by ata_dev_classify().
743 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
745 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
748 struct ata_port
*ap
= dev
->link
->ap
;
749 struct ata_taskfile tf
;
753 ap
->ops
->dev_select(ap
, dev
->devno
);
755 memset(&tf
, 0, sizeof(tf
));
757 ap
->ops
->tf_read(ap
, &tf
);
762 /* see if device passed diags: if master then continue and warn later */
763 if (err
== 0 && dev
->devno
== 0)
764 /* diagnostic fail : do nothing _YET_ */
765 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
768 else if ((dev
->devno
== 0) && (err
== 0x81))
773 /* determine if device is ATA or ATAPI */
774 class = ata_dev_classify(&tf
);
776 if (class == ATA_DEV_UNKNOWN
) {
777 /* If the device failed diagnostic, it's likely to
778 * have reported incorrect device signature too.
779 * Assume ATA device if the device seems present but
780 * device signature is invalid with diagnostic
783 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
786 class = ATA_DEV_NONE
;
787 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
788 class = ATA_DEV_NONE
;
794 * ata_id_string - Convert IDENTIFY DEVICE page into string
795 * @id: IDENTIFY DEVICE results we will examine
796 * @s: string into which data is output
797 * @ofs: offset into identify device page
798 * @len: length of string to return. must be an even number.
800 * The strings in the IDENTIFY DEVICE page are broken up into
801 * 16-bit chunks. Run through the string, and output each
802 * 8-bit chunk linearly, regardless of platform.
808 void ata_id_string(const u16
*id
, unsigned char *s
,
809 unsigned int ofs
, unsigned int len
)
828 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
829 * @id: IDENTIFY DEVICE results we will examine
830 * @s: string into which data is output
831 * @ofs: offset into identify device page
832 * @len: length of string to return. must be an odd number.
834 * This function is identical to ata_id_string except that it
835 * trims trailing spaces and terminates the resulting string with
836 * null. @len must be actual maximum length (even number) + 1.
841 void ata_id_c_string(const u16
*id
, unsigned char *s
,
842 unsigned int ofs
, unsigned int len
)
848 ata_id_string(id
, s
, ofs
, len
- 1);
850 p
= s
+ strnlen(s
, len
- 1);
851 while (p
> s
&& p
[-1] == ' ')
856 static u64
ata_id_n_sectors(const u16
*id
)
858 if (ata_id_has_lba(id
)) {
859 if (ata_id_has_lba48(id
))
860 return ata_id_u64(id
, 100);
862 return ata_id_u32(id
, 60);
864 if (ata_id_current_chs_valid(id
))
865 return ata_id_u32(id
, 57);
867 return id
[1] * id
[3] * id
[6];
871 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
875 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
876 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
877 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
878 sectors
|= (tf
->lbah
& 0xff) << 16;
879 sectors
|= (tf
->lbam
& 0xff) << 8;
880 sectors
|= (tf
->lbal
& 0xff);
885 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
889 sectors
|= (tf
->device
& 0x0f) << 24;
890 sectors
|= (tf
->lbah
& 0xff) << 16;
891 sectors
|= (tf
->lbam
& 0xff) << 8;
892 sectors
|= (tf
->lbal
& 0xff);
898 * ata_read_native_max_address - Read native max address
899 * @dev: target device
900 * @max_sectors: out parameter for the result native max address
902 * Perform an LBA48 or LBA28 native size query upon the device in
906 * 0 on success, -EACCES if command is aborted by the drive.
907 * -EIO on other errors.
909 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
911 unsigned int err_mask
;
912 struct ata_taskfile tf
;
913 int lba48
= ata_id_has_lba48(dev
->id
);
915 ata_tf_init(dev
, &tf
);
917 /* always clear all address registers */
918 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
921 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
922 tf
.flags
|= ATA_TFLAG_LBA48
;
924 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
926 tf
.protocol
|= ATA_PROT_NODATA
;
927 tf
.device
|= ATA_LBA
;
929 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
931 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
932 "max address (err_mask=0x%x)\n", err_mask
);
933 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
939 *max_sectors
= ata_tf_to_lba48(&tf
);
941 *max_sectors
= ata_tf_to_lba(&tf
);
942 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
948 * ata_set_max_sectors - Set max sectors
949 * @dev: target device
950 * @new_sectors: new max sectors value to set for the device
952 * Set max sectors of @dev to @new_sectors.
955 * 0 on success, -EACCES if command is aborted or denied (due to
956 * previous non-volatile SET_MAX) by the drive. -EIO on other
959 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
961 unsigned int err_mask
;
962 struct ata_taskfile tf
;
963 int lba48
= ata_id_has_lba48(dev
->id
);
967 ata_tf_init(dev
, &tf
);
969 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
972 tf
.command
= ATA_CMD_SET_MAX_EXT
;
973 tf
.flags
|= ATA_TFLAG_LBA48
;
975 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
976 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
977 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
979 tf
.command
= ATA_CMD_SET_MAX
;
981 tf
.device
|= (new_sectors
>> 24) & 0xf;
984 tf
.protocol
|= ATA_PROT_NODATA
;
985 tf
.device
|= ATA_LBA
;
987 tf
.lbal
= (new_sectors
>> 0) & 0xff;
988 tf
.lbam
= (new_sectors
>> 8) & 0xff;
989 tf
.lbah
= (new_sectors
>> 16) & 0xff;
991 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
993 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
994 "max address (err_mask=0x%x)\n", err_mask
);
995 if (err_mask
== AC_ERR_DEV
&&
996 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1005 * ata_hpa_resize - Resize a device with an HPA set
1006 * @dev: Device to resize
1008 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1009 * it if required to the full size of the media. The caller must check
1010 * the drive has the HPA feature set enabled.
1013 * 0 on success, -errno on failure.
1015 static int ata_hpa_resize(struct ata_device
*dev
)
1017 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1018 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1019 u64 sectors
= ata_id_n_sectors(dev
->id
);
1023 /* do we need to do it? */
1024 if (dev
->class != ATA_DEV_ATA
||
1025 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1026 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1029 /* read native max address */
1030 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1032 /* If HPA isn't going to be unlocked, skip HPA
1033 * resizing from the next try.
1035 if (!ata_ignore_hpa
) {
1036 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1037 "broken, will skip HPA handling\n");
1038 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1040 /* we can continue if device aborted the command */
1048 /* nothing to do? */
1049 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1050 if (!print_info
|| native_sectors
== sectors
)
1053 if (native_sectors
> sectors
)
1054 ata_dev_printk(dev
, KERN_INFO
,
1055 "HPA detected: current %llu, native %llu\n",
1056 (unsigned long long)sectors
,
1057 (unsigned long long)native_sectors
);
1058 else if (native_sectors
< sectors
)
1059 ata_dev_printk(dev
, KERN_WARNING
,
1060 "native sectors (%llu) is smaller than "
1062 (unsigned long long)native_sectors
,
1063 (unsigned long long)sectors
);
1067 /* let's unlock HPA */
1068 rc
= ata_set_max_sectors(dev
, native_sectors
);
1069 if (rc
== -EACCES
) {
1070 /* if device aborted the command, skip HPA resizing */
1071 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1072 "(%llu -> %llu), skipping HPA handling\n",
1073 (unsigned long long)sectors
,
1074 (unsigned long long)native_sectors
);
1075 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1080 /* re-read IDENTIFY data */
1081 rc
= ata_dev_reread_id(dev
, 0);
1083 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1084 "data after HPA resizing\n");
1089 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1090 ata_dev_printk(dev
, KERN_INFO
,
1091 "HPA unlocked: %llu -> %llu, native %llu\n",
1092 (unsigned long long)sectors
,
1093 (unsigned long long)new_sectors
,
1094 (unsigned long long)native_sectors
);
1101 * ata_id_to_dma_mode - Identify DMA mode from id block
1102 * @dev: device to identify
1103 * @unknown: mode to assume if we cannot tell
1105 * Set up the timing values for the device based upon the identify
1106 * reported values for the DMA mode. This function is used by drivers
1107 * which rely upon firmware configured modes, but wish to report the
1108 * mode correctly when possible.
1110 * In addition we emit similarly formatted messages to the default
1111 * ata_dev_set_mode handler, in order to provide consistency of
1115 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1120 /* Pack the DMA modes */
1121 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1122 if (dev
->id
[53] & 0x04)
1123 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1125 /* Select the mode in use */
1126 mode
= ata_xfer_mask2mode(mask
);
1129 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1130 ata_mode_string(mask
));
1132 /* SWDMA perhaps ? */
1134 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1137 /* Configure the device reporting */
1138 dev
->xfer_mode
= mode
;
1139 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1143 * ata_noop_dev_select - Select device 0/1 on ATA bus
1144 * @ap: ATA channel to manipulate
1145 * @device: ATA device (numbered from zero) to select
1147 * This function performs no actual function.
1149 * May be used as the dev_select() entry in ata_port_operations.
1154 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1160 * ata_std_dev_select - Select device 0/1 on ATA bus
1161 * @ap: ATA channel to manipulate
1162 * @device: ATA device (numbered from zero) to select
1164 * Use the method defined in the ATA specification to
1165 * make either device 0, or device 1, active on the
1166 * ATA channel. Works with both PIO and MMIO.
1168 * May be used as the dev_select() entry in ata_port_operations.
1174 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1179 tmp
= ATA_DEVICE_OBS
;
1181 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1183 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1184 ata_pause(ap
); /* needed; also flushes, for mmio */
1188 * ata_dev_select - Select device 0/1 on ATA bus
1189 * @ap: ATA channel to manipulate
1190 * @device: ATA device (numbered from zero) to select
1191 * @wait: non-zero to wait for Status register BSY bit to clear
1192 * @can_sleep: non-zero if context allows sleeping
1194 * Use the method defined in the ATA specification to
1195 * make either device 0, or device 1, active on the
1198 * This is a high-level version of ata_std_dev_select(),
1199 * which additionally provides the services of inserting
1200 * the proper pauses and status polling, where needed.
1206 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1207 unsigned int wait
, unsigned int can_sleep
)
1209 if (ata_msg_probe(ap
))
1210 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1211 "device %u, wait %u\n", device
, wait
);
1216 ap
->ops
->dev_select(ap
, device
);
1219 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1226 * ata_dump_id - IDENTIFY DEVICE info debugging output
1227 * @id: IDENTIFY DEVICE page to dump
1229 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1236 static inline void ata_dump_id(const u16
*id
)
1238 DPRINTK("49==0x%04x "
1248 DPRINTK("80==0x%04x "
1258 DPRINTK("88==0x%04x "
1265 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1266 * @id: IDENTIFY data to compute xfer mask from
1268 * Compute the xfermask for this device. This is not as trivial
1269 * as it seems if we must consider early devices correctly.
1271 * FIXME: pre IDE drive timing (do we care ?).
1279 static unsigned int ata_id_xfermask(const u16
*id
)
1281 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1283 /* Usual case. Word 53 indicates word 64 is valid */
1284 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1285 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1289 /* If word 64 isn't valid then Word 51 high byte holds
1290 * the PIO timing number for the maximum. Turn it into
1293 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1294 if (mode
< 5) /* Valid PIO range */
1295 pio_mask
= (2 << mode
) - 1;
1299 /* But wait.. there's more. Design your standards by
1300 * committee and you too can get a free iordy field to
1301 * process. However its the speeds not the modes that
1302 * are supported... Note drivers using the timing API
1303 * will get this right anyway
1307 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1309 if (ata_id_is_cfa(id
)) {
1311 * Process compact flash extended modes
1313 int pio
= id
[163] & 0x7;
1314 int dma
= (id
[163] >> 3) & 7;
1317 pio_mask
|= (1 << 5);
1319 pio_mask
|= (1 << 6);
1321 mwdma_mask
|= (1 << 3);
1323 mwdma_mask
|= (1 << 4);
1327 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1328 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1330 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1334 * ata_port_queue_task - Queue port_task
1335 * @ap: The ata_port to queue port_task for
1336 * @fn: workqueue function to be scheduled
1337 * @data: data for @fn to use
1338 * @delay: delay time for workqueue function
1340 * Schedule @fn(@data) for execution after @delay jiffies using
1341 * port_task. There is one port_task per port and it's the
1342 * user(low level driver)'s responsibility to make sure that only
1343 * one task is active at any given time.
1345 * libata core layer takes care of synchronization between
1346 * port_task and EH. ata_port_queue_task() may be ignored for EH
1350 * Inherited from caller.
1352 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1353 unsigned long delay
)
1355 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1356 ap
->port_task_data
= data
;
1358 /* may fail if ata_port_flush_task() in progress */
1359 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1363 * ata_port_flush_task - Flush port_task
1364 * @ap: The ata_port to flush port_task for
1366 * After this function completes, port_task is guranteed not to
1367 * be running or scheduled.
1370 * Kernel thread context (may sleep)
1372 void ata_port_flush_task(struct ata_port
*ap
)
1376 cancel_rearming_delayed_work(&ap
->port_task
);
1378 if (ata_msg_ctl(ap
))
1379 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1382 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1384 struct completion
*waiting
= qc
->private_data
;
1390 * ata_exec_internal_sg - execute libata internal command
1391 * @dev: Device to which the command is sent
1392 * @tf: Taskfile registers for the command and the result
1393 * @cdb: CDB for packet command
1394 * @dma_dir: Data tranfer direction of the command
1395 * @sg: sg list for the data buffer of the command
1396 * @n_elem: Number of sg entries
1397 * @timeout: Timeout in msecs (0 for default)
1399 * Executes libata internal command with timeout. @tf contains
1400 * command on entry and result on return. Timeout and error
1401 * conditions are reported via return value. No recovery action
1402 * is taken after a command times out. It's caller's duty to
1403 * clean up after timeout.
1406 * None. Should be called with kernel context, might sleep.
1409 * Zero on success, AC_ERR_* mask on failure
1411 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1412 struct ata_taskfile
*tf
, const u8
*cdb
,
1413 int dma_dir
, struct scatterlist
*sg
,
1414 unsigned int n_elem
, unsigned long timeout
)
1416 struct ata_link
*link
= dev
->link
;
1417 struct ata_port
*ap
= link
->ap
;
1418 u8 command
= tf
->command
;
1419 struct ata_queued_cmd
*qc
;
1420 unsigned int tag
, preempted_tag
;
1421 u32 preempted_sactive
, preempted_qc_active
;
1422 int preempted_nr_active_links
;
1423 DECLARE_COMPLETION_ONSTACK(wait
);
1424 unsigned long flags
;
1425 unsigned int err_mask
;
1428 spin_lock_irqsave(ap
->lock
, flags
);
1430 /* no internal command while frozen */
1431 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1432 spin_unlock_irqrestore(ap
->lock
, flags
);
1433 return AC_ERR_SYSTEM
;
1436 /* initialize internal qc */
1438 /* XXX: Tag 0 is used for drivers with legacy EH as some
1439 * drivers choke if any other tag is given. This breaks
1440 * ata_tag_internal() test for those drivers. Don't use new
1441 * EH stuff without converting to it.
1443 if (ap
->ops
->error_handler
)
1444 tag
= ATA_TAG_INTERNAL
;
1448 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1450 qc
= __ata_qc_from_tag(ap
, tag
);
1458 preempted_tag
= link
->active_tag
;
1459 preempted_sactive
= link
->sactive
;
1460 preempted_qc_active
= ap
->qc_active
;
1461 preempted_nr_active_links
= ap
->nr_active_links
;
1462 link
->active_tag
= ATA_TAG_POISON
;
1465 ap
->nr_active_links
= 0;
1467 /* prepare & issue qc */
1470 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1471 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1472 qc
->dma_dir
= dma_dir
;
1473 if (dma_dir
!= DMA_NONE
) {
1474 unsigned int i
, buflen
= 0;
1476 for (i
= 0; i
< n_elem
; i
++)
1477 buflen
+= sg
[i
].length
;
1479 ata_sg_init(qc
, sg
, n_elem
);
1480 qc
->nbytes
= buflen
;
1483 qc
->private_data
= &wait
;
1484 qc
->complete_fn
= ata_qc_complete_internal
;
1488 spin_unlock_irqrestore(ap
->lock
, flags
);
1491 timeout
= ata_probe_timeout
* 1000 / HZ
;
1493 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1495 ata_port_flush_task(ap
);
1498 spin_lock_irqsave(ap
->lock
, flags
);
1500 /* We're racing with irq here. If we lose, the
1501 * following test prevents us from completing the qc
1502 * twice. If we win, the port is frozen and will be
1503 * cleaned up by ->post_internal_cmd().
1505 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1506 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1508 if (ap
->ops
->error_handler
)
1509 ata_port_freeze(ap
);
1511 ata_qc_complete(qc
);
1513 if (ata_msg_warn(ap
))
1514 ata_dev_printk(dev
, KERN_WARNING
,
1515 "qc timeout (cmd 0x%x)\n", command
);
1518 spin_unlock_irqrestore(ap
->lock
, flags
);
1521 /* do post_internal_cmd */
1522 if (ap
->ops
->post_internal_cmd
)
1523 ap
->ops
->post_internal_cmd(qc
);
1525 /* perform minimal error analysis */
1526 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1527 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1528 qc
->err_mask
|= AC_ERR_DEV
;
1531 qc
->err_mask
|= AC_ERR_OTHER
;
1533 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1534 qc
->err_mask
&= ~AC_ERR_OTHER
;
1538 spin_lock_irqsave(ap
->lock
, flags
);
1540 *tf
= qc
->result_tf
;
1541 err_mask
= qc
->err_mask
;
1544 link
->active_tag
= preempted_tag
;
1545 link
->sactive
= preempted_sactive
;
1546 ap
->qc_active
= preempted_qc_active
;
1547 ap
->nr_active_links
= preempted_nr_active_links
;
1549 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1550 * Until those drivers are fixed, we detect the condition
1551 * here, fail the command with AC_ERR_SYSTEM and reenable the
1554 * Note that this doesn't change any behavior as internal
1555 * command failure results in disabling the device in the
1556 * higher layer for LLDDs without new reset/EH callbacks.
1558 * Kill the following code as soon as those drivers are fixed.
1560 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1561 err_mask
|= AC_ERR_SYSTEM
;
1565 spin_unlock_irqrestore(ap
->lock
, flags
);
1571 * ata_exec_internal - execute libata internal command
1572 * @dev: Device to which the command is sent
1573 * @tf: Taskfile registers for the command and the result
1574 * @cdb: CDB for packet command
1575 * @dma_dir: Data tranfer direction of the command
1576 * @buf: Data buffer of the command
1577 * @buflen: Length of data buffer
1578 * @timeout: Timeout in msecs (0 for default)
1580 * Wrapper around ata_exec_internal_sg() which takes simple
1581 * buffer instead of sg list.
1584 * None. Should be called with kernel context, might sleep.
1587 * Zero on success, AC_ERR_* mask on failure
1589 unsigned ata_exec_internal(struct ata_device
*dev
,
1590 struct ata_taskfile
*tf
, const u8
*cdb
,
1591 int dma_dir
, void *buf
, unsigned int buflen
,
1592 unsigned long timeout
)
1594 struct scatterlist
*psg
= NULL
, sg
;
1595 unsigned int n_elem
= 0;
1597 if (dma_dir
!= DMA_NONE
) {
1599 sg_init_one(&sg
, buf
, buflen
);
1604 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1609 * ata_do_simple_cmd - execute simple internal command
1610 * @dev: Device to which the command is sent
1611 * @cmd: Opcode to execute
1613 * Execute a 'simple' command, that only consists of the opcode
1614 * 'cmd' itself, without filling any other registers
1617 * Kernel thread context (may sleep).
1620 * Zero on success, AC_ERR_* mask on failure
1622 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1624 struct ata_taskfile tf
;
1626 ata_tf_init(dev
, &tf
);
1629 tf
.flags
|= ATA_TFLAG_DEVICE
;
1630 tf
.protocol
= ATA_PROT_NODATA
;
1632 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1636 * ata_pio_need_iordy - check if iordy needed
1639 * Check if the current speed of the device requires IORDY. Used
1640 * by various controllers for chip configuration.
1643 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1645 /* Controller doesn't support IORDY. Probably a pointless check
1646 as the caller should know this */
1647 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1649 /* PIO3 and higher it is mandatory */
1650 if (adev
->pio_mode
> XFER_PIO_2
)
1652 /* We turn it on when possible */
1653 if (ata_id_has_iordy(adev
->id
))
1659 * ata_pio_mask_no_iordy - Return the non IORDY mask
1662 * Compute the highest mode possible if we are not using iordy. Return
1663 * -1 if no iordy mode is available.
1666 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1668 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1669 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1670 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1671 /* Is the speed faster than the drive allows non IORDY ? */
1673 /* This is cycle times not frequency - watch the logic! */
1674 if (pio
> 240) /* PIO2 is 240nS per cycle */
1675 return 3 << ATA_SHIFT_PIO
;
1676 return 7 << ATA_SHIFT_PIO
;
1679 return 3 << ATA_SHIFT_PIO
;
1683 * ata_dev_read_id - Read ID data from the specified device
1684 * @dev: target device
1685 * @p_class: pointer to class of the target device (may be changed)
1686 * @flags: ATA_READID_* flags
1687 * @id: buffer to read IDENTIFY data into
1689 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1690 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1691 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1692 * for pre-ATA4 drives.
1694 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1695 * now we abort if we hit that case.
1698 * Kernel thread context (may sleep)
1701 * 0 on success, -errno otherwise.
1703 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1704 unsigned int flags
, u16
*id
)
1706 struct ata_port
*ap
= dev
->link
->ap
;
1707 unsigned int class = *p_class
;
1708 struct ata_taskfile tf
;
1709 unsigned int err_mask
= 0;
1711 int may_fallback
= 1, tried_spinup
= 0;
1714 if (ata_msg_ctl(ap
))
1715 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1717 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1719 ata_tf_init(dev
, &tf
);
1723 tf
.command
= ATA_CMD_ID_ATA
;
1726 tf
.command
= ATA_CMD_ID_ATAPI
;
1730 reason
= "unsupported class";
1734 tf
.protocol
= ATA_PROT_PIO
;
1736 /* Some devices choke if TF registers contain garbage. Make
1737 * sure those are properly initialized.
1739 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1741 /* Device presence detection is unreliable on some
1742 * controllers. Always poll IDENTIFY if available.
1744 tf
.flags
|= ATA_TFLAG_POLLING
;
1746 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1747 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1749 if (err_mask
& AC_ERR_NODEV_HINT
) {
1750 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1751 ap
->print_id
, dev
->devno
);
1755 /* Device or controller might have reported the wrong
1756 * device class. Give a shot at the other IDENTIFY if
1757 * the current one is aborted by the device.
1760 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1763 if (class == ATA_DEV_ATA
)
1764 class = ATA_DEV_ATAPI
;
1766 class = ATA_DEV_ATA
;
1771 reason
= "I/O error";
1775 /* Falling back doesn't make sense if ID data was read
1776 * successfully at least once.
1780 swap_buf_le16(id
, ATA_ID_WORDS
);
1784 reason
= "device reports invalid type";
1786 if (class == ATA_DEV_ATA
) {
1787 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1790 if (ata_id_is_ata(id
))
1794 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1797 * Drive powered-up in standby mode, and requires a specific
1798 * SET_FEATURES spin-up subcommand before it will accept
1799 * anything other than the original IDENTIFY command.
1801 ata_tf_init(dev
, &tf
);
1802 tf
.command
= ATA_CMD_SET_FEATURES
;
1803 tf
.feature
= SETFEATURES_SPINUP
;
1804 tf
.protocol
= ATA_PROT_NODATA
;
1805 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1806 err_mask
= ata_exec_internal(dev
, &tf
, NULL
,
1807 DMA_NONE
, NULL
, 0, 0);
1808 if (err_mask
&& id
[2] != 0x738c) {
1810 reason
= "SPINUP failed";
1814 * If the drive initially returned incomplete IDENTIFY info,
1815 * we now must reissue the IDENTIFY command.
1817 if (id
[2] == 0x37c8)
1821 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1823 * The exact sequence expected by certain pre-ATA4 drives is:
1825 * IDENTIFY (optional in early ATA)
1826 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1828 * Some drives were very specific about that exact sequence.
1830 * Note that ATA4 says lba is mandatory so the second check
1831 * shoud never trigger.
1833 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1834 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1837 reason
= "INIT_DEV_PARAMS failed";
1841 /* current CHS translation info (id[53-58]) might be
1842 * changed. reread the identify device info.
1844 flags
&= ~ATA_READID_POSTRESET
;
1854 if (ata_msg_warn(ap
))
1855 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1856 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1860 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1862 struct ata_port
*ap
= dev
->link
->ap
;
1863 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1866 static void ata_dev_config_ncq(struct ata_device
*dev
,
1867 char *desc
, size_t desc_sz
)
1869 struct ata_port
*ap
= dev
->link
->ap
;
1870 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1872 if (!ata_id_has_ncq(dev
->id
)) {
1876 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1877 snprintf(desc
, desc_sz
, "NCQ (not used)");
1880 if (ap
->flags
& ATA_FLAG_NCQ
) {
1881 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1882 dev
->flags
|= ATA_DFLAG_NCQ
;
1885 if (hdepth
>= ddepth
)
1886 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1888 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1892 * ata_dev_configure - Configure the specified ATA/ATAPI device
1893 * @dev: Target device to configure
1895 * Configure @dev according to @dev->id. Generic and low-level
1896 * driver specific fixups are also applied.
1899 * Kernel thread context (may sleep)
1902 * 0 on success, -errno otherwise
1904 int ata_dev_configure(struct ata_device
*dev
)
1906 struct ata_port
*ap
= dev
->link
->ap
;
1907 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1908 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1909 const u16
*id
= dev
->id
;
1910 unsigned int xfer_mask
;
1911 char revbuf
[7]; /* XYZ-99\0 */
1912 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1913 char modelbuf
[ATA_ID_PROD_LEN
+1];
1916 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1917 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1922 if (ata_msg_probe(ap
))
1923 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1926 dev
->horkage
|= ata_dev_blacklisted(dev
);
1928 /* let ACPI work its magic */
1929 rc
= ata_acpi_on_devcfg(dev
);
1933 /* massage HPA, do it early as it might change IDENTIFY data */
1934 rc
= ata_hpa_resize(dev
);
1938 /* print device capabilities */
1939 if (ata_msg_probe(ap
))
1940 ata_dev_printk(dev
, KERN_DEBUG
,
1941 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1942 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1944 id
[49], id
[82], id
[83], id
[84],
1945 id
[85], id
[86], id
[87], id
[88]);
1947 /* initialize to-be-configured parameters */
1948 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1949 dev
->max_sectors
= 0;
1957 * common ATA, ATAPI feature tests
1960 /* find max transfer mode; for printk only */
1961 xfer_mask
= ata_id_xfermask(id
);
1963 if (ata_msg_probe(ap
))
1966 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1967 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1970 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1973 /* ATA-specific feature tests */
1974 if (dev
->class == ATA_DEV_ATA
) {
1975 if (ata_id_is_cfa(id
)) {
1976 if (id
[162] & 1) /* CPRM may make this media unusable */
1977 ata_dev_printk(dev
, KERN_WARNING
,
1978 "supports DRM functions and may "
1979 "not be fully accessable.\n");
1980 snprintf(revbuf
, 7, "CFA");
1983 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1985 dev
->n_sectors
= ata_id_n_sectors(id
);
1987 if (dev
->id
[59] & 0x100)
1988 dev
->multi_count
= dev
->id
[59] & 0xff;
1990 if (ata_id_has_lba(id
)) {
1991 const char *lba_desc
;
1995 dev
->flags
|= ATA_DFLAG_LBA
;
1996 if (ata_id_has_lba48(id
)) {
1997 dev
->flags
|= ATA_DFLAG_LBA48
;
2000 if (dev
->n_sectors
>= (1UL << 28) &&
2001 ata_id_has_flush_ext(id
))
2002 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2006 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2008 /* print device info to dmesg */
2009 if (ata_msg_drv(ap
) && print_info
) {
2010 ata_dev_printk(dev
, KERN_INFO
,
2011 "%s: %s, %s, max %s\n",
2012 revbuf
, modelbuf
, fwrevbuf
,
2013 ata_mode_string(xfer_mask
));
2014 ata_dev_printk(dev
, KERN_INFO
,
2015 "%Lu sectors, multi %u: %s %s\n",
2016 (unsigned long long)dev
->n_sectors
,
2017 dev
->multi_count
, lba_desc
, ncq_desc
);
2022 /* Default translation */
2023 dev
->cylinders
= id
[1];
2025 dev
->sectors
= id
[6];
2027 if (ata_id_current_chs_valid(id
)) {
2028 /* Current CHS translation is valid. */
2029 dev
->cylinders
= id
[54];
2030 dev
->heads
= id
[55];
2031 dev
->sectors
= id
[56];
2034 /* print device info to dmesg */
2035 if (ata_msg_drv(ap
) && print_info
) {
2036 ata_dev_printk(dev
, KERN_INFO
,
2037 "%s: %s, %s, max %s\n",
2038 revbuf
, modelbuf
, fwrevbuf
,
2039 ata_mode_string(xfer_mask
));
2040 ata_dev_printk(dev
, KERN_INFO
,
2041 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2042 (unsigned long long)dev
->n_sectors
,
2043 dev
->multi_count
, dev
->cylinders
,
2044 dev
->heads
, dev
->sectors
);
2051 /* ATAPI-specific feature tests */
2052 else if (dev
->class == ATA_DEV_ATAPI
) {
2053 const char *cdb_intr_string
= "";
2054 const char *atapi_an_string
= "";
2057 rc
= atapi_cdb_len(id
);
2058 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2059 if (ata_msg_warn(ap
))
2060 ata_dev_printk(dev
, KERN_WARNING
,
2061 "unsupported CDB len\n");
2065 dev
->cdb_len
= (unsigned int) rc
;
2067 /* Enable ATAPI AN if both the host and device have
2068 * the support. If PMP is attached, SNTF is required
2069 * to enable ATAPI AN to discern between PHY status
2070 * changed notifications and ATAPI ANs.
2072 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2073 (!ap
->nr_pmp_links
||
2074 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2075 unsigned int err_mask
;
2077 /* issue SET feature command to turn this on */
2078 err_mask
= ata_dev_set_AN(dev
, SETFEATURES_SATA_ENABLE
);
2080 ata_dev_printk(dev
, KERN_ERR
,
2081 "failed to enable ATAPI AN "
2082 "(err_mask=0x%x)\n", err_mask
);
2084 dev
->flags
|= ATA_DFLAG_AN
;
2085 atapi_an_string
= ", ATAPI AN";
2089 if (ata_id_cdb_intr(dev
->id
)) {
2090 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2091 cdb_intr_string
= ", CDB intr";
2094 /* print device info to dmesg */
2095 if (ata_msg_drv(ap
) && print_info
)
2096 ata_dev_printk(dev
, KERN_INFO
,
2097 "ATAPI: %s, %s, max %s%s%s\n",
2099 ata_mode_string(xfer_mask
),
2100 cdb_intr_string
, atapi_an_string
);
2103 /* determine max_sectors */
2104 dev
->max_sectors
= ATA_MAX_SECTORS
;
2105 if (dev
->flags
& ATA_DFLAG_LBA48
)
2106 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2108 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2109 /* Let the user know. We don't want to disallow opens for
2110 rescue purposes, or in case the vendor is just a blithering
2113 ata_dev_printk(dev
, KERN_WARNING
,
2114 "Drive reports diagnostics failure. This may indicate a drive\n");
2115 ata_dev_printk(dev
, KERN_WARNING
,
2116 "fault or invalid emulation. Contact drive vendor for information.\n");
2120 /* limit bridge transfers to udma5, 200 sectors */
2121 if (ata_dev_knobble(dev
)) {
2122 if (ata_msg_drv(ap
) && print_info
)
2123 ata_dev_printk(dev
, KERN_INFO
,
2124 "applying bridge limits\n");
2125 dev
->udma_mask
&= ATA_UDMA5
;
2126 dev
->max_sectors
= ATA_MAX_SECTORS
;
2129 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2130 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2133 if (ap
->ops
->dev_config
)
2134 ap
->ops
->dev_config(dev
);
2136 if (ata_msg_probe(ap
))
2137 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2138 __FUNCTION__
, ata_chk_status(ap
));
2142 if (ata_msg_probe(ap
))
2143 ata_dev_printk(dev
, KERN_DEBUG
,
2144 "%s: EXIT, err\n", __FUNCTION__
);
2149 * ata_cable_40wire - return 40 wire cable type
2152 * Helper method for drivers which want to hardwire 40 wire cable
2156 int ata_cable_40wire(struct ata_port
*ap
)
2158 return ATA_CBL_PATA40
;
2162 * ata_cable_80wire - return 80 wire cable type
2165 * Helper method for drivers which want to hardwire 80 wire cable
2169 int ata_cable_80wire(struct ata_port
*ap
)
2171 return ATA_CBL_PATA80
;
2175 * ata_cable_unknown - return unknown PATA cable.
2178 * Helper method for drivers which have no PATA cable detection.
2181 int ata_cable_unknown(struct ata_port
*ap
)
2183 return ATA_CBL_PATA_UNK
;
2187 * ata_cable_sata - return SATA cable type
2190 * Helper method for drivers which have SATA cables
2193 int ata_cable_sata(struct ata_port
*ap
)
2195 return ATA_CBL_SATA
;
2199 * ata_bus_probe - Reset and probe ATA bus
2202 * Master ATA bus probing function. Initiates a hardware-dependent
2203 * bus reset, then attempts to identify any devices found on
2207 * PCI/etc. bus probe sem.
2210 * Zero on success, negative errno otherwise.
2213 int ata_bus_probe(struct ata_port
*ap
)
2215 unsigned int classes
[ATA_MAX_DEVICES
];
2216 int tries
[ATA_MAX_DEVICES
];
2218 struct ata_device
*dev
;
2222 ata_link_for_each_dev(dev
, &ap
->link
)
2223 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2226 /* reset and determine device classes */
2227 ap
->ops
->phy_reset(ap
);
2229 ata_link_for_each_dev(dev
, &ap
->link
) {
2230 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2231 dev
->class != ATA_DEV_UNKNOWN
)
2232 classes
[dev
->devno
] = dev
->class;
2234 classes
[dev
->devno
] = ATA_DEV_NONE
;
2236 dev
->class = ATA_DEV_UNKNOWN
;
2241 /* after the reset the device state is PIO 0 and the controller
2242 state is undefined. Record the mode */
2244 ata_link_for_each_dev(dev
, &ap
->link
)
2245 dev
->pio_mode
= XFER_PIO_0
;
2247 /* read IDENTIFY page and configure devices. We have to do the identify
2248 specific sequence bass-ackwards so that PDIAG- is released by
2251 ata_link_for_each_dev(dev
, &ap
->link
) {
2252 if (tries
[dev
->devno
])
2253 dev
->class = classes
[dev
->devno
];
2255 if (!ata_dev_enabled(dev
))
2258 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2264 /* Now ask for the cable type as PDIAG- should have been released */
2265 if (ap
->ops
->cable_detect
)
2266 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2268 /* We may have SATA bridge glue hiding here irrespective of the
2269 reported cable types and sensed types */
2270 ata_link_for_each_dev(dev
, &ap
->link
) {
2271 if (!ata_dev_enabled(dev
))
2273 /* SATA drives indicate we have a bridge. We don't know which
2274 end of the link the bridge is which is a problem */
2275 if (ata_id_is_sata(dev
->id
))
2276 ap
->cbl
= ATA_CBL_SATA
;
2279 /* After the identify sequence we can now set up the devices. We do
2280 this in the normal order so that the user doesn't get confused */
2282 ata_link_for_each_dev(dev
, &ap
->link
) {
2283 if (!ata_dev_enabled(dev
))
2286 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2287 rc
= ata_dev_configure(dev
);
2288 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2293 /* configure transfer mode */
2294 rc
= ata_set_mode(&ap
->link
, &dev
);
2298 ata_link_for_each_dev(dev
, &ap
->link
)
2299 if (ata_dev_enabled(dev
))
2302 /* no device present, disable port */
2303 ata_port_disable(ap
);
2307 tries
[dev
->devno
]--;
2311 /* eeek, something went very wrong, give up */
2312 tries
[dev
->devno
] = 0;
2316 /* give it just one more chance */
2317 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2319 if (tries
[dev
->devno
] == 1) {
2320 /* This is the last chance, better to slow
2321 * down than lose it.
2323 sata_down_spd_limit(&ap
->link
);
2324 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2328 if (!tries
[dev
->devno
])
2329 ata_dev_disable(dev
);
2335 * ata_port_probe - Mark port as enabled
2336 * @ap: Port for which we indicate enablement
2338 * Modify @ap data structure such that the system
2339 * thinks that the entire port is enabled.
2341 * LOCKING: host lock, or some other form of
2345 void ata_port_probe(struct ata_port
*ap
)
2347 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2351 * sata_print_link_status - Print SATA link status
2352 * @link: SATA link to printk link status about
2354 * This function prints link speed and status of a SATA link.
2359 void sata_print_link_status(struct ata_link
*link
)
2361 u32 sstatus
, scontrol
, tmp
;
2363 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2365 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2367 if (ata_link_online(link
)) {
2368 tmp
= (sstatus
>> 4) & 0xf;
2369 ata_link_printk(link
, KERN_INFO
,
2370 "SATA link up %s (SStatus %X SControl %X)\n",
2371 sata_spd_string(tmp
), sstatus
, scontrol
);
2373 ata_link_printk(link
, KERN_INFO
,
2374 "SATA link down (SStatus %X SControl %X)\n",
2380 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2381 * @ap: SATA port associated with target SATA PHY.
2383 * This function issues commands to standard SATA Sxxx
2384 * PHY registers, to wake up the phy (and device), and
2385 * clear any reset condition.
2388 * PCI/etc. bus probe sem.
2391 void __sata_phy_reset(struct ata_port
*ap
)
2393 struct ata_link
*link
= &ap
->link
;
2394 unsigned long timeout
= jiffies
+ (HZ
* 5);
2397 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2398 /* issue phy wake/reset */
2399 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2400 /* Couldn't find anything in SATA I/II specs, but
2401 * AHCI-1.1 10.4.2 says at least 1 ms. */
2404 /* phy wake/clear reset */
2405 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2407 /* wait for phy to become ready, if necessary */
2410 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2411 if ((sstatus
& 0xf) != 1)
2413 } while (time_before(jiffies
, timeout
));
2415 /* print link status */
2416 sata_print_link_status(link
);
2418 /* TODO: phy layer with polling, timeouts, etc. */
2419 if (!ata_link_offline(link
))
2422 ata_port_disable(ap
);
2424 if (ap
->flags
& ATA_FLAG_DISABLED
)
2427 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2428 ata_port_disable(ap
);
2432 ap
->cbl
= ATA_CBL_SATA
;
2436 * sata_phy_reset - Reset SATA bus.
2437 * @ap: SATA port associated with target SATA PHY.
2439 * This function resets the SATA bus, and then probes
2440 * the bus for devices.
2443 * PCI/etc. bus probe sem.
2446 void sata_phy_reset(struct ata_port
*ap
)
2448 __sata_phy_reset(ap
);
2449 if (ap
->flags
& ATA_FLAG_DISABLED
)
2455 * ata_dev_pair - return other device on cable
2458 * Obtain the other device on the same cable, or if none is
2459 * present NULL is returned
2462 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2464 struct ata_link
*link
= adev
->link
;
2465 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2466 if (!ata_dev_enabled(pair
))
2472 * ata_port_disable - Disable port.
2473 * @ap: Port to be disabled.
2475 * Modify @ap data structure such that the system
2476 * thinks that the entire port is disabled, and should
2477 * never attempt to probe or communicate with devices
2480 * LOCKING: host lock, or some other form of
2484 void ata_port_disable(struct ata_port
*ap
)
2486 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2487 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2488 ap
->flags
|= ATA_FLAG_DISABLED
;
2492 * sata_down_spd_limit - adjust SATA spd limit downward
2493 * @link: Link to adjust SATA spd limit for
2495 * Adjust SATA spd limit of @link downward. Note that this
2496 * function only adjusts the limit. The change must be applied
2497 * using sata_set_spd().
2500 * Inherited from caller.
2503 * 0 on success, negative errno on failure
2505 int sata_down_spd_limit(struct ata_link
*link
)
2507 u32 sstatus
, spd
, mask
;
2510 if (!sata_scr_valid(link
))
2513 /* If SCR can be read, use it to determine the current SPD.
2514 * If not, use cached value in link->sata_spd.
2516 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2518 spd
= (sstatus
>> 4) & 0xf;
2520 spd
= link
->sata_spd
;
2522 mask
= link
->sata_spd_limit
;
2526 /* unconditionally mask off the highest bit */
2527 highbit
= fls(mask
) - 1;
2528 mask
&= ~(1 << highbit
);
2530 /* Mask off all speeds higher than or equal to the current
2531 * one. Force 1.5Gbps if current SPD is not available.
2534 mask
&= (1 << (spd
- 1)) - 1;
2538 /* were we already at the bottom? */
2542 link
->sata_spd_limit
= mask
;
2544 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2545 sata_spd_string(fls(mask
)));
2550 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2554 if (link
->sata_spd_limit
== UINT_MAX
)
2557 limit
= fls(link
->sata_spd_limit
);
2559 spd
= (*scontrol
>> 4) & 0xf;
2560 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2562 return spd
!= limit
;
2566 * sata_set_spd_needed - is SATA spd configuration needed
2567 * @link: Link in question
2569 * Test whether the spd limit in SControl matches
2570 * @link->sata_spd_limit. This function is used to determine
2571 * whether hardreset is necessary to apply SATA spd
2575 * Inherited from caller.
2578 * 1 if SATA spd configuration is needed, 0 otherwise.
2580 int sata_set_spd_needed(struct ata_link
*link
)
2584 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2587 return __sata_set_spd_needed(link
, &scontrol
);
2591 * sata_set_spd - set SATA spd according to spd limit
2592 * @link: Link to set SATA spd for
2594 * Set SATA spd of @link according to sata_spd_limit.
2597 * Inherited from caller.
2600 * 0 if spd doesn't need to be changed, 1 if spd has been
2601 * changed. Negative errno if SCR registers are inaccessible.
2603 int sata_set_spd(struct ata_link
*link
)
2608 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2611 if (!__sata_set_spd_needed(link
, &scontrol
))
2614 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2621 * This mode timing computation functionality is ported over from
2622 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2625 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2626 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2627 * for UDMA6, which is currently supported only by Maxtor drives.
2629 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2632 static const struct ata_timing ata_timing
[] = {
2634 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2635 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2636 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2637 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2639 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2640 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2641 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2642 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2643 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2645 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2647 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2648 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2649 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2651 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2652 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2653 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2655 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2656 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2657 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2658 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2660 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2661 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2662 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2664 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2669 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2670 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2672 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2674 q
->setup
= EZ(t
->setup
* 1000, T
);
2675 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2676 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2677 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2678 q
->active
= EZ(t
->active
* 1000, T
);
2679 q
->recover
= EZ(t
->recover
* 1000, T
);
2680 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2681 q
->udma
= EZ(t
->udma
* 1000, UT
);
2684 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2685 struct ata_timing
*m
, unsigned int what
)
2687 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2688 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2689 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2690 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2691 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2692 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2693 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2694 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2697 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2699 const struct ata_timing
*t
;
2701 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2702 if (t
->mode
== 0xFF)
2707 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2708 struct ata_timing
*t
, int T
, int UT
)
2710 const struct ata_timing
*s
;
2711 struct ata_timing p
;
2717 if (!(s
= ata_timing_find_mode(speed
)))
2720 memcpy(t
, s
, sizeof(*s
));
2723 * If the drive is an EIDE drive, it can tell us it needs extended
2724 * PIO/MW_DMA cycle timing.
2727 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2728 memset(&p
, 0, sizeof(p
));
2729 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2730 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2731 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2732 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2733 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2735 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2739 * Convert the timing to bus clock counts.
2742 ata_timing_quantize(t
, t
, T
, UT
);
2745 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2746 * S.M.A.R.T * and some other commands. We have to ensure that the
2747 * DMA cycle timing is slower/equal than the fastest PIO timing.
2750 if (speed
> XFER_PIO_6
) {
2751 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2752 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2756 * Lengthen active & recovery time so that cycle time is correct.
2759 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2760 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2761 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2764 if (t
->active
+ t
->recover
< t
->cycle
) {
2765 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2766 t
->recover
= t
->cycle
- t
->active
;
2769 /* In a few cases quantisation may produce enough errors to
2770 leave t->cycle too low for the sum of active and recovery
2771 if so we must correct this */
2772 if (t
->active
+ t
->recover
> t
->cycle
)
2773 t
->cycle
= t
->active
+ t
->recover
;
2779 * ata_down_xfermask_limit - adjust dev xfer masks downward
2780 * @dev: Device to adjust xfer masks
2781 * @sel: ATA_DNXFER_* selector
2783 * Adjust xfer masks of @dev downward. Note that this function
2784 * does not apply the change. Invoking ata_set_mode() afterwards
2785 * will apply the limit.
2788 * Inherited from caller.
2791 * 0 on success, negative errno on failure
2793 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2796 unsigned int orig_mask
, xfer_mask
;
2797 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2800 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2801 sel
&= ~ATA_DNXFER_QUIET
;
2803 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2806 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2809 case ATA_DNXFER_PIO
:
2810 highbit
= fls(pio_mask
) - 1;
2811 pio_mask
&= ~(1 << highbit
);
2814 case ATA_DNXFER_DMA
:
2816 highbit
= fls(udma_mask
) - 1;
2817 udma_mask
&= ~(1 << highbit
);
2820 } else if (mwdma_mask
) {
2821 highbit
= fls(mwdma_mask
) - 1;
2822 mwdma_mask
&= ~(1 << highbit
);
2828 case ATA_DNXFER_40C
:
2829 udma_mask
&= ATA_UDMA_MASK_40C
;
2832 case ATA_DNXFER_FORCE_PIO0
:
2834 case ATA_DNXFER_FORCE_PIO
:
2843 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2845 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2849 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2850 snprintf(buf
, sizeof(buf
), "%s:%s",
2851 ata_mode_string(xfer_mask
),
2852 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2854 snprintf(buf
, sizeof(buf
), "%s",
2855 ata_mode_string(xfer_mask
));
2857 ata_dev_printk(dev
, KERN_WARNING
,
2858 "limiting speed to %s\n", buf
);
2861 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2867 static int ata_dev_set_mode(struct ata_device
*dev
)
2869 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2870 unsigned int err_mask
;
2873 dev
->flags
&= ~ATA_DFLAG_PIO
;
2874 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2875 dev
->flags
|= ATA_DFLAG_PIO
;
2877 err_mask
= ata_dev_set_xfermode(dev
);
2878 /* Old CFA may refuse this command, which is just fine */
2879 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2880 err_mask
&= ~AC_ERR_DEV
;
2881 /* Some very old devices and some bad newer ones fail any kind of
2882 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2883 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2884 dev
->pio_mode
<= XFER_PIO_2
)
2885 err_mask
&= ~AC_ERR_DEV
;
2887 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2888 "(err_mask=0x%x)\n", err_mask
);
2892 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2893 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
2894 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2898 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2899 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2901 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2902 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2907 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2908 * @link: link on which timings will be programmed
2909 * @r_failed_dev: out paramter for failed device
2911 * Standard implementation of the function used to tune and set
2912 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2913 * ata_dev_set_mode() fails, pointer to the failing device is
2914 * returned in @r_failed_dev.
2917 * PCI/etc. bus probe sem.
2920 * 0 on success, negative errno otherwise
2923 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2925 struct ata_port
*ap
= link
->ap
;
2926 struct ata_device
*dev
;
2927 int rc
= 0, used_dma
= 0, found
= 0;
2929 /* step 1: calculate xfer_mask */
2930 ata_link_for_each_dev(dev
, link
) {
2931 unsigned int pio_mask
, dma_mask
;
2932 unsigned int mode_mask
;
2934 if (!ata_dev_enabled(dev
))
2937 mode_mask
= ATA_DMA_MASK_ATA
;
2938 if (dev
->class == ATA_DEV_ATAPI
)
2939 mode_mask
= ATA_DMA_MASK_ATAPI
;
2940 else if (ata_id_is_cfa(dev
->id
))
2941 mode_mask
= ATA_DMA_MASK_CFA
;
2943 ata_dev_xfermask(dev
);
2945 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2946 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2948 if (libata_dma_mask
& mode_mask
)
2949 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2953 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2954 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2963 /* step 2: always set host PIO timings */
2964 ata_link_for_each_dev(dev
, link
) {
2965 if (!ata_dev_enabled(dev
))
2968 if (!dev
->pio_mode
) {
2969 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2974 dev
->xfer_mode
= dev
->pio_mode
;
2975 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2976 if (ap
->ops
->set_piomode
)
2977 ap
->ops
->set_piomode(ap
, dev
);
2980 /* step 3: set host DMA timings */
2981 ata_link_for_each_dev(dev
, link
) {
2982 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2985 dev
->xfer_mode
= dev
->dma_mode
;
2986 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2987 if (ap
->ops
->set_dmamode
)
2988 ap
->ops
->set_dmamode(ap
, dev
);
2991 /* step 4: update devices' xfer mode */
2992 ata_link_for_each_dev(dev
, link
) {
2993 /* don't update suspended devices' xfer mode */
2994 if (!ata_dev_enabled(dev
))
2997 rc
= ata_dev_set_mode(dev
);
3002 /* Record simplex status. If we selected DMA then the other
3003 * host channels are not permitted to do so.
3005 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3006 ap
->host
->simplex_claimed
= ap
;
3010 *r_failed_dev
= dev
;
3015 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3016 * @link: link on which timings will be programmed
3017 * @r_failed_dev: out paramter for failed device
3019 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3020 * ata_set_mode() fails, pointer to the failing device is
3021 * returned in @r_failed_dev.
3024 * PCI/etc. bus probe sem.
3027 * 0 on success, negative errno otherwise
3029 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3031 struct ata_port
*ap
= link
->ap
;
3033 /* has private set_mode? */
3034 if (ap
->ops
->set_mode
)
3035 return ap
->ops
->set_mode(link
, r_failed_dev
);
3036 return ata_do_set_mode(link
, r_failed_dev
);
3040 * ata_tf_to_host - issue ATA taskfile to host controller
3041 * @ap: port to which command is being issued
3042 * @tf: ATA taskfile register set
3044 * Issues ATA taskfile register set to ATA host controller,
3045 * with proper synchronization with interrupt handler and
3049 * spin_lock_irqsave(host lock)
3052 static inline void ata_tf_to_host(struct ata_port
*ap
,
3053 const struct ata_taskfile
*tf
)
3055 ap
->ops
->tf_load(ap
, tf
);
3056 ap
->ops
->exec_command(ap
, tf
);
3060 * ata_busy_sleep - sleep until BSY clears, or timeout
3061 * @ap: port containing status register to be polled
3062 * @tmout_pat: impatience timeout
3063 * @tmout: overall timeout
3065 * Sleep until ATA Status register bit BSY clears,
3066 * or a timeout occurs.
3069 * Kernel thread context (may sleep).
3072 * 0 on success, -errno otherwise.
3074 int ata_busy_sleep(struct ata_port
*ap
,
3075 unsigned long tmout_pat
, unsigned long tmout
)
3077 unsigned long timer_start
, timeout
;
3080 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3081 timer_start
= jiffies
;
3082 timeout
= timer_start
+ tmout_pat
;
3083 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3084 time_before(jiffies
, timeout
)) {
3086 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3089 if (status
!= 0xff && (status
& ATA_BUSY
))
3090 ata_port_printk(ap
, KERN_WARNING
,
3091 "port is slow to respond, please be patient "
3092 "(Status 0x%x)\n", status
);
3094 timeout
= timer_start
+ tmout
;
3095 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3096 time_before(jiffies
, timeout
)) {
3098 status
= ata_chk_status(ap
);
3104 if (status
& ATA_BUSY
) {
3105 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3106 "(%lu secs, Status 0x%x)\n",
3107 tmout
/ HZ
, status
);
3115 * ata_wait_ready - sleep until BSY clears, or timeout
3116 * @ap: port containing status register to be polled
3117 * @deadline: deadline jiffies for the operation
3119 * Sleep until ATA Status register bit BSY clears, or timeout
3123 * Kernel thread context (may sleep).
3126 * 0 on success, -errno otherwise.
3128 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3130 unsigned long start
= jiffies
;
3134 u8 status
= ata_chk_status(ap
);
3135 unsigned long now
= jiffies
;
3137 if (!(status
& ATA_BUSY
))
3139 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3141 if (time_after(now
, deadline
))
3144 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3145 (deadline
- now
> 3 * HZ
)) {
3146 ata_port_printk(ap
, KERN_WARNING
,
3147 "port is slow to respond, please be patient "
3148 "(Status 0x%x)\n", status
);
3156 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3157 unsigned long deadline
)
3159 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3160 unsigned int dev0
= devmask
& (1 << 0);
3161 unsigned int dev1
= devmask
& (1 << 1);
3164 /* if device 0 was found in ata_devchk, wait for its
3168 rc
= ata_wait_ready(ap
, deadline
);
3176 /* if device 1 was found in ata_devchk, wait for register
3177 * access briefly, then wait for BSY to clear.
3182 ap
->ops
->dev_select(ap
, 1);
3184 /* Wait for register access. Some ATAPI devices fail
3185 * to set nsect/lbal after reset, so don't waste too
3186 * much time on it. We're gonna wait for !BSY anyway.
3188 for (i
= 0; i
< 2; i
++) {
3191 nsect
= ioread8(ioaddr
->nsect_addr
);
3192 lbal
= ioread8(ioaddr
->lbal_addr
);
3193 if ((nsect
== 1) && (lbal
== 1))
3195 msleep(50); /* give drive a breather */
3198 rc
= ata_wait_ready(ap
, deadline
);
3206 /* is all this really necessary? */
3207 ap
->ops
->dev_select(ap
, 0);
3209 ap
->ops
->dev_select(ap
, 1);
3211 ap
->ops
->dev_select(ap
, 0);
3216 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3217 unsigned long deadline
)
3219 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3220 struct ata_device
*dev
;
3223 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3225 /* software reset. causes dev0 to be selected */
3226 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3227 udelay(20); /* FIXME: flush */
3228 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3229 udelay(20); /* FIXME: flush */
3230 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3232 /* If we issued an SRST then an ATA drive (not ATAPI)
3233 * may have changed configuration and be in PIO0 timing. If
3234 * we did a hard reset (or are coming from power on) this is
3235 * true for ATA or ATAPI. Until we've set a suitable controller
3236 * mode we should not touch the bus as we may be talking too fast.
3239 ata_link_for_each_dev(dev
, &ap
->link
)
3240 dev
->pio_mode
= XFER_PIO_0
;
3242 /* If the controller has a pio mode setup function then use
3243 it to set the chipset to rights. Don't touch the DMA setup
3244 as that will be dealt with when revalidating */
3245 if (ap
->ops
->set_piomode
) {
3246 ata_link_for_each_dev(dev
, &ap
->link
)
3247 if (devmask
& (1 << i
++))
3248 ap
->ops
->set_piomode(ap
, dev
);
3251 /* spec mandates ">= 2ms" before checking status.
3252 * We wait 150ms, because that was the magic delay used for
3253 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3254 * between when the ATA command register is written, and then
3255 * status is checked. Because waiting for "a while" before
3256 * checking status is fine, post SRST, we perform this magic
3257 * delay here as well.
3259 * Old drivers/ide uses the 2mS rule and then waits for ready
3263 /* Before we perform post reset processing we want to see if
3264 * the bus shows 0xFF because the odd clown forgets the D7
3265 * pulldown resistor.
3267 if (ata_check_status(ap
) == 0xFF)
3270 return ata_bus_post_reset(ap
, devmask
, deadline
);
3274 * ata_bus_reset - reset host port and associated ATA channel
3275 * @ap: port to reset
3277 * This is typically the first time we actually start issuing
3278 * commands to the ATA channel. We wait for BSY to clear, then
3279 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3280 * result. Determine what devices, if any, are on the channel
3281 * by looking at the device 0/1 error register. Look at the signature
3282 * stored in each device's taskfile registers, to determine if
3283 * the device is ATA or ATAPI.
3286 * PCI/etc. bus probe sem.
3287 * Obtains host lock.
3290 * Sets ATA_FLAG_DISABLED if bus reset fails.
3293 void ata_bus_reset(struct ata_port
*ap
)
3295 struct ata_device
*device
= ap
->link
.device
;
3296 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3297 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3299 unsigned int dev0
, dev1
= 0, devmask
= 0;
3302 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3304 /* determine if device 0/1 are present */
3305 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3308 dev0
= ata_devchk(ap
, 0);
3310 dev1
= ata_devchk(ap
, 1);
3314 devmask
|= (1 << 0);
3316 devmask
|= (1 << 1);
3318 /* select device 0 again */
3319 ap
->ops
->dev_select(ap
, 0);
3321 /* issue bus reset */
3322 if (ap
->flags
& ATA_FLAG_SRST
) {
3323 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3324 if (rc
&& rc
!= -ENODEV
)
3329 * determine by signature whether we have ATA or ATAPI devices
3331 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3332 if ((slave_possible
) && (err
!= 0x81))
3333 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3335 /* is double-select really necessary? */
3336 if (device
[1].class != ATA_DEV_NONE
)
3337 ap
->ops
->dev_select(ap
, 1);
3338 if (device
[0].class != ATA_DEV_NONE
)
3339 ap
->ops
->dev_select(ap
, 0);
3341 /* if no devices were detected, disable this port */
3342 if ((device
[0].class == ATA_DEV_NONE
) &&
3343 (device
[1].class == ATA_DEV_NONE
))
3346 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3347 /* set up device control for ATA_FLAG_SATA_RESET */
3348 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3355 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3356 ata_port_disable(ap
);
3362 * sata_link_debounce - debounce SATA phy status
3363 * @link: ATA link to debounce SATA phy status for
3364 * @params: timing parameters { interval, duratinon, timeout } in msec
3365 * @deadline: deadline jiffies for the operation
3367 * Make sure SStatus of @link reaches stable state, determined by
3368 * holding the same value where DET is not 1 for @duration polled
3369 * every @interval, before @timeout. Timeout constraints the
3370 * beginning of the stable state. Because DET gets stuck at 1 on
3371 * some controllers after hot unplugging, this functions waits
3372 * until timeout then returns 0 if DET is stable at 1.
3374 * @timeout is further limited by @deadline. The sooner of the
3378 * Kernel thread context (may sleep)
3381 * 0 on success, -errno on failure.
3383 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3384 unsigned long deadline
)
3386 unsigned long interval_msec
= params
[0];
3387 unsigned long duration
= msecs_to_jiffies(params
[1]);
3388 unsigned long last_jiffies
, t
;
3392 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3393 if (time_before(t
, deadline
))
3396 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3401 last_jiffies
= jiffies
;
3404 msleep(interval_msec
);
3405 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3411 if (cur
== 1 && time_before(jiffies
, deadline
))
3413 if (time_after(jiffies
, last_jiffies
+ duration
))
3418 /* unstable, start over */
3420 last_jiffies
= jiffies
;
3422 /* Check deadline. If debouncing failed, return
3423 * -EPIPE to tell upper layer to lower link speed.
3425 if (time_after(jiffies
, deadline
))
3431 * sata_link_resume - resume SATA link
3432 * @link: ATA link to resume SATA
3433 * @params: timing parameters { interval, duratinon, timeout } in msec
3434 * @deadline: deadline jiffies for the operation
3436 * Resume SATA phy @link and debounce it.
3439 * Kernel thread context (may sleep)
3442 * 0 on success, -errno on failure.
3444 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3445 unsigned long deadline
)
3450 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3453 scontrol
= (scontrol
& 0x0f0) | 0x300;
3455 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3458 /* Some PHYs react badly if SStatus is pounded immediately
3459 * after resuming. Delay 200ms before debouncing.
3463 return sata_link_debounce(link
, params
, deadline
);
3467 * ata_std_prereset - prepare for reset
3468 * @link: ATA link to be reset
3469 * @deadline: deadline jiffies for the operation
3471 * @link is about to be reset. Initialize it. Failure from
3472 * prereset makes libata abort whole reset sequence and give up
3473 * that port, so prereset should be best-effort. It does its
3474 * best to prepare for reset sequence but if things go wrong, it
3475 * should just whine, not fail.
3478 * Kernel thread context (may sleep)
3481 * 0 on success, -errno otherwise.
3483 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3485 struct ata_port
*ap
= link
->ap
;
3486 struct ata_eh_context
*ehc
= &link
->eh_context
;
3487 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3490 /* handle link resume */
3491 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3492 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3493 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3495 /* Some PMPs don't work with only SRST, force hardreset if PMP
3498 if (ap
->flags
& ATA_FLAG_PMP
)
3499 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3501 /* if we're about to do hardreset, nothing more to do */
3502 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3505 /* if SATA, resume link */
3506 if (ap
->flags
& ATA_FLAG_SATA
) {
3507 rc
= sata_link_resume(link
, timing
, deadline
);
3508 /* whine about phy resume failure but proceed */
3509 if (rc
&& rc
!= -EOPNOTSUPP
)
3510 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3511 "link for reset (errno=%d)\n", rc
);
3514 /* Wait for !BSY if the controller can wait for the first D2H
3515 * Reg FIS and we don't know that no device is attached.
3517 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3518 rc
= ata_wait_ready(ap
, deadline
);
3519 if (rc
&& rc
!= -ENODEV
) {
3520 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3521 "(errno=%d), forcing hardreset\n", rc
);
3522 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3530 * ata_std_softreset - reset host port via ATA SRST
3531 * @link: ATA link to reset
3532 * @classes: resulting classes of attached devices
3533 * @deadline: deadline jiffies for the operation
3535 * Reset host port using ATA SRST.
3538 * Kernel thread context (may sleep)
3541 * 0 on success, -errno otherwise.
3543 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3544 unsigned long deadline
)
3546 struct ata_port
*ap
= link
->ap
;
3547 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3548 unsigned int devmask
= 0;
3554 if (ata_link_offline(link
)) {
3555 classes
[0] = ATA_DEV_NONE
;
3559 /* determine if device 0/1 are present */
3560 if (ata_devchk(ap
, 0))
3561 devmask
|= (1 << 0);
3562 if (slave_possible
&& ata_devchk(ap
, 1))
3563 devmask
|= (1 << 1);
3565 /* select device 0 again */
3566 ap
->ops
->dev_select(ap
, 0);
3568 /* issue bus reset */
3569 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3570 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3571 /* if link is occupied, -ENODEV too is an error */
3572 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3573 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3577 /* determine by signature whether we have ATA or ATAPI devices */
3578 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3579 devmask
& (1 << 0), &err
);
3580 if (slave_possible
&& err
!= 0x81)
3581 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3582 devmask
& (1 << 1), &err
);
3585 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3590 * sata_link_hardreset - reset link via SATA phy reset
3591 * @link: link to reset
3592 * @timing: timing parameters { interval, duratinon, timeout } in msec
3593 * @deadline: deadline jiffies for the operation
3595 * SATA phy-reset @link using DET bits of SControl register.
3598 * Kernel thread context (may sleep)
3601 * 0 on success, -errno otherwise.
3603 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3604 unsigned long deadline
)
3611 if (sata_set_spd_needed(link
)) {
3612 /* SATA spec says nothing about how to reconfigure
3613 * spd. To be on the safe side, turn off phy during
3614 * reconfiguration. This works for at least ICH7 AHCI
3617 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3620 scontrol
= (scontrol
& 0x0f0) | 0x304;
3622 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3628 /* issue phy wake/reset */
3629 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3632 scontrol
= (scontrol
& 0x0f0) | 0x301;
3634 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3637 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3638 * 10.4.2 says at least 1 ms.
3642 /* bring link back */
3643 rc
= sata_link_resume(link
, timing
, deadline
);
3645 DPRINTK("EXIT, rc=%d\n", rc
);
3650 * sata_std_hardreset - reset host port via SATA phy reset
3651 * @link: link to reset
3652 * @class: resulting class of attached device
3653 * @deadline: deadline jiffies for the operation
3655 * SATA phy-reset host port using DET bits of SControl register,
3656 * wait for !BSY and classify the attached device.
3659 * Kernel thread context (may sleep)
3662 * 0 on success, -errno otherwise.
3664 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3665 unsigned long deadline
)
3667 struct ata_port
*ap
= link
->ap
;
3668 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3674 rc
= sata_link_hardreset(link
, timing
, deadline
);
3676 ata_link_printk(link
, KERN_ERR
,
3677 "COMRESET failed (errno=%d)\n", rc
);
3681 /* TODO: phy layer with polling, timeouts, etc. */
3682 if (ata_link_offline(link
)) {
3683 *class = ATA_DEV_NONE
;
3684 DPRINTK("EXIT, link offline\n");
3688 /* wait a while before checking status, see SRST for more info */
3691 /* If PMP is supported, we have to do follow-up SRST. Note
3692 * that some PMPs don't send D2H Reg FIS after hardreset at
3693 * all if the first port is empty. Wait for it just for a
3694 * second and request follow-up SRST.
3696 if (ap
->flags
& ATA_FLAG_PMP
) {
3697 ata_wait_ready(ap
, jiffies
+ HZ
);
3701 rc
= ata_wait_ready(ap
, deadline
);
3702 /* link occupied, -ENODEV too is an error */
3704 ata_link_printk(link
, KERN_ERR
,
3705 "COMRESET failed (errno=%d)\n", rc
);
3709 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3711 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3713 DPRINTK("EXIT, class=%u\n", *class);
3718 * ata_std_postreset - standard postreset callback
3719 * @link: the target ata_link
3720 * @classes: classes of attached devices
3722 * This function is invoked after a successful reset. Note that
3723 * the device might have been reset more than once using
3724 * different reset methods before postreset is invoked.
3727 * Kernel thread context (may sleep)
3729 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3731 struct ata_port
*ap
= link
->ap
;
3736 /* print link status */
3737 sata_print_link_status(link
);
3740 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3741 sata_scr_write(link
, SCR_ERROR
, serror
);
3743 /* is double-select really necessary? */
3744 if (classes
[0] != ATA_DEV_NONE
)
3745 ap
->ops
->dev_select(ap
, 1);
3746 if (classes
[1] != ATA_DEV_NONE
)
3747 ap
->ops
->dev_select(ap
, 0);
3749 /* bail out if no device is present */
3750 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3751 DPRINTK("EXIT, no device\n");
3755 /* set up device control */
3756 if (ap
->ioaddr
.ctl_addr
)
3757 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3763 * ata_dev_same_device - Determine whether new ID matches configured device
3764 * @dev: device to compare against
3765 * @new_class: class of the new device
3766 * @new_id: IDENTIFY page of the new device
3768 * Compare @new_class and @new_id against @dev and determine
3769 * whether @dev is the device indicated by @new_class and
3776 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3778 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3781 const u16
*old_id
= dev
->id
;
3782 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3783 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3785 if (dev
->class != new_class
) {
3786 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3787 dev
->class, new_class
);
3791 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3792 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3793 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3794 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3796 if (strcmp(model
[0], model
[1])) {
3797 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3798 "'%s' != '%s'\n", model
[0], model
[1]);
3802 if (strcmp(serial
[0], serial
[1])) {
3803 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3804 "'%s' != '%s'\n", serial
[0], serial
[1]);
3812 * ata_dev_reread_id - Re-read IDENTIFY data
3813 * @dev: target ATA device
3814 * @readid_flags: read ID flags
3816 * Re-read IDENTIFY page and make sure @dev is still attached to
3820 * Kernel thread context (may sleep)
3823 * 0 on success, negative errno otherwise
3825 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3827 unsigned int class = dev
->class;
3828 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3832 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3836 /* is the device still there? */
3837 if (!ata_dev_same_device(dev
, class, id
))
3840 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3845 * ata_dev_revalidate - Revalidate ATA device
3846 * @dev: device to revalidate
3847 * @new_class: new class code
3848 * @readid_flags: read ID flags
3850 * Re-read IDENTIFY page, make sure @dev is still attached to the
3851 * port and reconfigure it according to the new IDENTIFY page.
3854 * Kernel thread context (may sleep)
3857 * 0 on success, negative errno otherwise
3859 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3860 unsigned int readid_flags
)
3862 u64 n_sectors
= dev
->n_sectors
;
3865 if (!ata_dev_enabled(dev
))
3868 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3869 if (ata_class_enabled(new_class
) &&
3870 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3871 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3872 dev
->class, new_class
);
3878 rc
= ata_dev_reread_id(dev
, readid_flags
);
3882 /* configure device according to the new ID */
3883 rc
= ata_dev_configure(dev
);
3887 /* verify n_sectors hasn't changed */
3888 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3889 dev
->n_sectors
!= n_sectors
) {
3890 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3892 (unsigned long long)n_sectors
,
3893 (unsigned long long)dev
->n_sectors
);
3895 /* restore original n_sectors */
3896 dev
->n_sectors
= n_sectors
;
3905 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3909 struct ata_blacklist_entry
{
3910 const char *model_num
;
3911 const char *model_rev
;
3912 unsigned long horkage
;
3915 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3916 /* Devices with DMA related problems under Linux */
3917 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3918 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3919 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3920 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3921 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3922 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3923 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3924 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3925 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3926 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3927 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3928 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3929 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3930 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3931 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3932 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3933 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3934 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3935 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3936 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3937 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3938 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3939 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3940 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3941 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3942 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3943 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3944 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3945 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3946 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3947 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3948 { "IOMEGA ZIP 250 ATAPI Floppy",
3949 NULL
, ATA_HORKAGE_NODMA
},
3950 /* Odd clown on sil3726/4726 PMPs */
3951 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
3952 ATA_HORKAGE_SKIP_PM
},
3954 /* Weird ATAPI devices */
3955 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3957 /* Devices we expect to fail diagnostics */
3959 /* Devices where NCQ should be avoided */
3961 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3962 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3963 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3965 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3966 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3967 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
3968 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
3969 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3971 /* Blacklist entries taken from Silicon Image 3124/3132
3972 Windows driver .inf file - also several Linux problem reports */
3973 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3974 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3975 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3976 /* Drives which do spurious command completion */
3977 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3978 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3979 { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ
, },
3980 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3981 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3982 { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ
, },
3983 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3984 { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3985 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3986 { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ
, },
3987 { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ
, },
3988 { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ
, },
3989 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3991 /* devices which puke on READ_NATIVE_MAX */
3992 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3993 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3994 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3995 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3997 /* Devices which report 1 sector over size HPA */
3998 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3999 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4005 int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4011 * check for trailing wildcard: *\0
4013 p
= strchr(patt
, wildchar
);
4014 if (p
&& ((*(p
+ 1)) == 0))
4019 return strncmp(patt
, name
, len
);
4022 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4024 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4025 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4026 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4028 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4029 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4031 while (ad
->model_num
) {
4032 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4033 if (ad
->model_rev
== NULL
)
4035 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4043 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4045 /* We don't support polling DMA.
4046 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4047 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4049 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4050 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4052 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4056 * ata_dev_xfermask - Compute supported xfermask of the given device
4057 * @dev: Device to compute xfermask for
4059 * Compute supported xfermask of @dev and store it in
4060 * dev->*_mask. This function is responsible for applying all
4061 * known limits including host controller limits, device
4067 static void ata_dev_xfermask(struct ata_device
*dev
)
4069 struct ata_link
*link
= dev
->link
;
4070 struct ata_port
*ap
= link
->ap
;
4071 struct ata_host
*host
= ap
->host
;
4072 unsigned long xfer_mask
;
4074 /* controller modes available */
4075 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4076 ap
->mwdma_mask
, ap
->udma_mask
);
4078 /* drive modes available */
4079 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4080 dev
->mwdma_mask
, dev
->udma_mask
);
4081 xfer_mask
&= ata_id_xfermask(dev
->id
);
4084 * CFA Advanced TrueIDE timings are not allowed on a shared
4087 if (ata_dev_pair(dev
)) {
4088 /* No PIO5 or PIO6 */
4089 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4090 /* No MWDMA3 or MWDMA 4 */
4091 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4094 if (ata_dma_blacklisted(dev
)) {
4095 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4096 ata_dev_printk(dev
, KERN_WARNING
,
4097 "device is on DMA blacklist, disabling DMA\n");
4100 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4101 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4102 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4103 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4104 "other device, disabling DMA\n");
4107 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4108 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4110 if (ap
->ops
->mode_filter
)
4111 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4113 /* Apply cable rule here. Don't apply it early because when
4114 * we handle hot plug the cable type can itself change.
4115 * Check this last so that we know if the transfer rate was
4116 * solely limited by the cable.
4117 * Unknown or 80 wire cables reported host side are checked
4118 * drive side as well. Cases where we know a 40wire cable
4119 * is used safely for 80 are not checked here.
4121 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4122 /* UDMA/44 or higher would be available */
4123 if((ap
->cbl
== ATA_CBL_PATA40
) ||
4124 (ata_drive_40wire(dev
->id
) &&
4125 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4126 ap
->cbl
== ATA_CBL_PATA80
))) {
4127 ata_dev_printk(dev
, KERN_WARNING
,
4128 "limited to UDMA/33 due to 40-wire cable\n");
4129 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4132 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4133 &dev
->mwdma_mask
, &dev
->udma_mask
);
4137 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4138 * @dev: Device to which command will be sent
4140 * Issue SET FEATURES - XFER MODE command to device @dev
4144 * PCI/etc. bus probe sem.
4147 * 0 on success, AC_ERR_* mask otherwise.
4150 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4152 struct ata_taskfile tf
;
4153 unsigned int err_mask
;
4155 /* set up set-features taskfile */
4156 DPRINTK("set features - xfer mode\n");
4158 /* Some controllers and ATAPI devices show flaky interrupt
4159 * behavior after setting xfer mode. Use polling instead.
4161 ata_tf_init(dev
, &tf
);
4162 tf
.command
= ATA_CMD_SET_FEATURES
;
4163 tf
.feature
= SETFEATURES_XFER
;
4164 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4165 tf
.protocol
= ATA_PROT_NODATA
;
4166 tf
.nsect
= dev
->xfer_mode
;
4168 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4170 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4175 * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
4176 * @dev: Device to which command will be sent
4177 * @enable: Whether to enable or disable the feature
4179 * Issue SET FEATURES - SATA FEATURES command to device @dev
4180 * on port @ap with sector count set to indicate Asynchronous
4181 * Notification feature
4184 * PCI/etc. bus probe sem.
4187 * 0 on success, AC_ERR_* mask otherwise.
4189 static unsigned int ata_dev_set_AN(struct ata_device
*dev
, u8 enable
)
4191 struct ata_taskfile tf
;
4192 unsigned int err_mask
;
4194 /* set up set-features taskfile */
4195 DPRINTK("set features - SATA features\n");
4197 ata_tf_init(dev
, &tf
);
4198 tf
.command
= ATA_CMD_SET_FEATURES
;
4199 tf
.feature
= enable
;
4200 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4201 tf
.protocol
= ATA_PROT_NODATA
;
4204 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4206 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4211 * ata_dev_init_params - Issue INIT DEV PARAMS command
4212 * @dev: Device to which command will be sent
4213 * @heads: Number of heads (taskfile parameter)
4214 * @sectors: Number of sectors (taskfile parameter)
4217 * Kernel thread context (may sleep)
4220 * 0 on success, AC_ERR_* mask otherwise.
4222 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4223 u16 heads
, u16 sectors
)
4225 struct ata_taskfile tf
;
4226 unsigned int err_mask
;
4228 /* Number of sectors per track 1-255. Number of heads 1-16 */
4229 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4230 return AC_ERR_INVALID
;
4232 /* set up init dev params taskfile */
4233 DPRINTK("init dev params \n");
4235 ata_tf_init(dev
, &tf
);
4236 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4237 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4238 tf
.protocol
= ATA_PROT_NODATA
;
4240 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4242 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4243 /* A clean abort indicates an original or just out of spec drive
4244 and we should continue as we issue the setup based on the
4245 drive reported working geometry */
4246 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4249 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4254 * ata_sg_clean - Unmap DMA memory associated with command
4255 * @qc: Command containing DMA memory to be released
4257 * Unmap all mapped DMA memory associated with this command.
4260 * spin_lock_irqsave(host lock)
4262 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4264 struct ata_port
*ap
= qc
->ap
;
4265 struct scatterlist
*sg
= qc
->__sg
;
4266 int dir
= qc
->dma_dir
;
4267 void *pad_buf
= NULL
;
4269 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4270 WARN_ON(sg
== NULL
);
4272 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4273 WARN_ON(qc
->n_elem
> 1);
4275 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4277 /* if we padded the buffer out to 32-bit bound, and data
4278 * xfer direction is from-device, we must copy from the
4279 * pad buffer back into the supplied buffer
4281 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4282 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4284 if (qc
->flags
& ATA_QCFLAG_SG
) {
4286 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4287 /* restore last sg */
4288 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4290 struct scatterlist
*psg
= &qc
->pad_sgent
;
4291 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4292 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4293 kunmap_atomic(addr
, KM_IRQ0
);
4297 dma_unmap_single(ap
->dev
,
4298 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4301 sg
->length
+= qc
->pad_len
;
4303 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4304 pad_buf
, qc
->pad_len
);
4307 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4312 * ata_fill_sg - Fill PCI IDE PRD table
4313 * @qc: Metadata associated with taskfile to be transferred
4315 * Fill PCI IDE PRD (scatter-gather) table with segments
4316 * associated with the current disk command.
4319 * spin_lock_irqsave(host lock)
4322 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4324 struct ata_port
*ap
= qc
->ap
;
4325 struct scatterlist
*sg
;
4328 WARN_ON(qc
->__sg
== NULL
);
4329 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4332 ata_for_each_sg(sg
, qc
) {
4336 /* determine if physical DMA addr spans 64K boundary.
4337 * Note h/w doesn't support 64-bit, so we unconditionally
4338 * truncate dma_addr_t to u32.
4340 addr
= (u32
) sg_dma_address(sg
);
4341 sg_len
= sg_dma_len(sg
);
4344 offset
= addr
& 0xffff;
4346 if ((offset
+ sg_len
) > 0x10000)
4347 len
= 0x10000 - offset
;
4349 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4350 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4351 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4360 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4364 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4365 * @qc: Metadata associated with taskfile to be transferred
4367 * Fill PCI IDE PRD (scatter-gather) table with segments
4368 * associated with the current disk command. Perform the fill
4369 * so that we avoid writing any length 64K records for
4370 * controllers that don't follow the spec.
4373 * spin_lock_irqsave(host lock)
4376 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4378 struct ata_port
*ap
= qc
->ap
;
4379 struct scatterlist
*sg
;
4382 WARN_ON(qc
->__sg
== NULL
);
4383 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4386 ata_for_each_sg(sg
, qc
) {
4388 u32 sg_len
, len
, blen
;
4390 /* determine if physical DMA addr spans 64K boundary.
4391 * Note h/w doesn't support 64-bit, so we unconditionally
4392 * truncate dma_addr_t to u32.
4394 addr
= (u32
) sg_dma_address(sg
);
4395 sg_len
= sg_dma_len(sg
);
4398 offset
= addr
& 0xffff;
4400 if ((offset
+ sg_len
) > 0x10000)
4401 len
= 0x10000 - offset
;
4403 blen
= len
& 0xffff;
4404 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4406 /* Some PATA chipsets like the CS5530 can't
4407 cope with 0x0000 meaning 64K as the spec says */
4408 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4410 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4412 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4413 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4422 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4426 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4427 * @qc: Metadata associated with taskfile to check
4429 * Allow low-level driver to filter ATA PACKET commands, returning
4430 * a status indicating whether or not it is OK to use DMA for the
4431 * supplied PACKET command.
4434 * spin_lock_irqsave(host lock)
4436 * RETURNS: 0 when ATAPI DMA can be used
4439 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4441 struct ata_port
*ap
= qc
->ap
;
4443 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4444 * few ATAPI devices choke on such DMA requests.
4446 if (unlikely(qc
->nbytes
& 15))
4449 if (ap
->ops
->check_atapi_dma
)
4450 return ap
->ops
->check_atapi_dma(qc
);
4456 * ata_std_qc_defer - Check whether a qc needs to be deferred
4457 * @qc: ATA command in question
4459 * Non-NCQ commands cannot run with any other command, NCQ or
4460 * not. As upper layer only knows the queue depth, we are
4461 * responsible for maintaining exclusion. This function checks
4462 * whether a new command @qc can be issued.
4465 * spin_lock_irqsave(host lock)
4468 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4470 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4472 struct ata_link
*link
= qc
->dev
->link
;
4474 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4475 if (!ata_tag_valid(link
->active_tag
))
4478 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4482 return ATA_DEFER_LINK
;
4486 * ata_qc_prep - Prepare taskfile for submission
4487 * @qc: Metadata associated with taskfile to be prepared
4489 * Prepare ATA taskfile for submission.
4492 * spin_lock_irqsave(host lock)
4494 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4496 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4503 * ata_dumb_qc_prep - Prepare taskfile for submission
4504 * @qc: Metadata associated with taskfile to be prepared
4506 * Prepare ATA taskfile for submission.
4509 * spin_lock_irqsave(host lock)
4511 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4513 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4516 ata_fill_sg_dumb(qc
);
4519 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4522 * ata_sg_init_one - Associate command with memory buffer
4523 * @qc: Command to be associated
4524 * @buf: Memory buffer
4525 * @buflen: Length of memory buffer, in bytes.
4527 * Initialize the data-related elements of queued_cmd @qc
4528 * to point to a single memory buffer, @buf of byte length @buflen.
4531 * spin_lock_irqsave(host lock)
4534 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4536 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4538 qc
->__sg
= &qc
->sgent
;
4540 qc
->orig_n_elem
= 1;
4542 qc
->nbytes
= buflen
;
4544 sg_init_one(&qc
->sgent
, buf
, buflen
);
4548 * ata_sg_init - Associate command with scatter-gather table.
4549 * @qc: Command to be associated
4550 * @sg: Scatter-gather table.
4551 * @n_elem: Number of elements in s/g table.
4553 * Initialize the data-related elements of queued_cmd @qc
4554 * to point to a scatter-gather table @sg, containing @n_elem
4558 * spin_lock_irqsave(host lock)
4561 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4562 unsigned int n_elem
)
4564 qc
->flags
|= ATA_QCFLAG_SG
;
4566 qc
->n_elem
= n_elem
;
4567 qc
->orig_n_elem
= n_elem
;
4571 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4572 * @qc: Command with memory buffer to be mapped.
4574 * DMA-map the memory buffer associated with queued_cmd @qc.
4577 * spin_lock_irqsave(host lock)
4580 * Zero on success, negative on error.
4583 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4585 struct ata_port
*ap
= qc
->ap
;
4586 int dir
= qc
->dma_dir
;
4587 struct scatterlist
*sg
= qc
->__sg
;
4588 dma_addr_t dma_address
;
4591 /* we must lengthen transfers to end on a 32-bit boundary */
4592 qc
->pad_len
= sg
->length
& 3;
4594 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4595 struct scatterlist
*psg
= &qc
->pad_sgent
;
4597 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4599 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4601 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4602 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4605 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4606 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4608 sg
->length
-= qc
->pad_len
;
4609 if (sg
->length
== 0)
4612 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4613 sg
->length
, qc
->pad_len
);
4621 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4623 if (dma_mapping_error(dma_address
)) {
4625 sg
->length
+= qc
->pad_len
;
4629 sg_dma_address(sg
) = dma_address
;
4630 sg_dma_len(sg
) = sg
->length
;
4633 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4634 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4640 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4641 * @qc: Command with scatter-gather table to be mapped.
4643 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4646 * spin_lock_irqsave(host lock)
4649 * Zero on success, negative on error.
4653 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4655 struct ata_port
*ap
= qc
->ap
;
4656 struct scatterlist
*sg
= qc
->__sg
;
4657 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4658 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4660 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4661 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4663 /* we must lengthen transfers to end on a 32-bit boundary */
4664 qc
->pad_len
= lsg
->length
& 3;
4666 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4667 struct scatterlist
*psg
= &qc
->pad_sgent
;
4668 unsigned int offset
;
4670 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4672 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4675 * psg->page/offset are used to copy to-be-written
4676 * data in this function or read data in ata_sg_clean.
4678 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4679 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4680 psg
->offset
= offset_in_page(offset
);
4682 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4683 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4684 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4685 kunmap_atomic(addr
, KM_IRQ0
);
4688 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4689 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4691 lsg
->length
-= qc
->pad_len
;
4692 if (lsg
->length
== 0)
4695 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4696 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4699 pre_n_elem
= qc
->n_elem
;
4700 if (trim_sg
&& pre_n_elem
)
4709 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4711 /* restore last sg */
4712 lsg
->length
+= qc
->pad_len
;
4716 DPRINTK("%d sg elements mapped\n", n_elem
);
4719 qc
->n_elem
= n_elem
;
4725 * swap_buf_le16 - swap halves of 16-bit words in place
4726 * @buf: Buffer to swap
4727 * @buf_words: Number of 16-bit words in buffer.
4729 * Swap halves of 16-bit words if needed to convert from
4730 * little-endian byte order to native cpu byte order, or
4734 * Inherited from caller.
4736 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4741 for (i
= 0; i
< buf_words
; i
++)
4742 buf
[i
] = le16_to_cpu(buf
[i
]);
4743 #endif /* __BIG_ENDIAN */
4747 * ata_data_xfer - Transfer data by PIO
4748 * @adev: device to target
4750 * @buflen: buffer length
4751 * @write_data: read/write
4753 * Transfer data from/to the device data register by PIO.
4756 * Inherited from caller.
4758 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4759 unsigned int buflen
, int write_data
)
4761 struct ata_port
*ap
= adev
->link
->ap
;
4762 unsigned int words
= buflen
>> 1;
4764 /* Transfer multiple of 2 bytes */
4766 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4768 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4770 /* Transfer trailing 1 byte, if any. */
4771 if (unlikely(buflen
& 0x01)) {
4772 u16 align_buf
[1] = { 0 };
4773 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4776 memcpy(align_buf
, trailing_buf
, 1);
4777 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4779 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4780 memcpy(trailing_buf
, align_buf
, 1);
4786 * ata_data_xfer_noirq - Transfer data by PIO
4787 * @adev: device to target
4789 * @buflen: buffer length
4790 * @write_data: read/write
4792 * Transfer data from/to the device data register by PIO. Do the
4793 * transfer with interrupts disabled.
4796 * Inherited from caller.
4798 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4799 unsigned int buflen
, int write_data
)
4801 unsigned long flags
;
4802 local_irq_save(flags
);
4803 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4804 local_irq_restore(flags
);
4809 * ata_pio_sector - Transfer a sector of data.
4810 * @qc: Command on going
4812 * Transfer qc->sect_size bytes of data from/to the ATA device.
4815 * Inherited from caller.
4818 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4820 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4821 struct scatterlist
*sg
= qc
->__sg
;
4822 struct ata_port
*ap
= qc
->ap
;
4824 unsigned int offset
;
4827 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4828 ap
->hsm_task_state
= HSM_ST_LAST
;
4830 page
= sg
[qc
->cursg
].page
;
4831 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4833 /* get the current page and offset */
4834 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4835 offset
%= PAGE_SIZE
;
4837 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4839 if (PageHighMem(page
)) {
4840 unsigned long flags
;
4842 /* FIXME: use a bounce buffer */
4843 local_irq_save(flags
);
4844 buf
= kmap_atomic(page
, KM_IRQ0
);
4846 /* do the actual data transfer */
4847 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4849 kunmap_atomic(buf
, KM_IRQ0
);
4850 local_irq_restore(flags
);
4852 buf
= page_address(page
);
4853 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4856 qc
->curbytes
+= qc
->sect_size
;
4857 qc
->cursg_ofs
+= qc
->sect_size
;
4859 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4866 * ata_pio_sectors - Transfer one or many sectors.
4867 * @qc: Command on going
4869 * Transfer one or many sectors of data from/to the
4870 * ATA device for the DRQ request.
4873 * Inherited from caller.
4876 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4878 if (is_multi_taskfile(&qc
->tf
)) {
4879 /* READ/WRITE MULTIPLE */
4882 WARN_ON(qc
->dev
->multi_count
== 0);
4884 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4885 qc
->dev
->multi_count
);
4891 ata_altstatus(qc
->ap
); /* flush */
4895 * atapi_send_cdb - Write CDB bytes to hardware
4896 * @ap: Port to which ATAPI device is attached.
4897 * @qc: Taskfile currently active
4899 * When device has indicated its readiness to accept
4900 * a CDB, this function is called. Send the CDB.
4906 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4909 DPRINTK("send cdb\n");
4910 WARN_ON(qc
->dev
->cdb_len
< 12);
4912 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4913 ata_altstatus(ap
); /* flush */
4915 switch (qc
->tf
.protocol
) {
4916 case ATA_PROT_ATAPI
:
4917 ap
->hsm_task_state
= HSM_ST
;
4919 case ATA_PROT_ATAPI_NODATA
:
4920 ap
->hsm_task_state
= HSM_ST_LAST
;
4922 case ATA_PROT_ATAPI_DMA
:
4923 ap
->hsm_task_state
= HSM_ST_LAST
;
4924 /* initiate bmdma */
4925 ap
->ops
->bmdma_start(qc
);
4931 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4932 * @qc: Command on going
4933 * @bytes: number of bytes
4935 * Transfer Transfer data from/to the ATAPI device.
4938 * Inherited from caller.
4942 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4944 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4945 struct scatterlist
*sg
= qc
->__sg
;
4946 struct ata_port
*ap
= qc
->ap
;
4949 unsigned int offset
, count
;
4951 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4952 ap
->hsm_task_state
= HSM_ST_LAST
;
4955 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4957 * The end of qc->sg is reached and the device expects
4958 * more data to transfer. In order not to overrun qc->sg
4959 * and fulfill length specified in the byte count register,
4960 * - for read case, discard trailing data from the device
4961 * - for write case, padding zero data to the device
4963 u16 pad_buf
[1] = { 0 };
4964 unsigned int words
= bytes
>> 1;
4967 if (words
) /* warning if bytes > 1 */
4968 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4969 "%u bytes trailing data\n", bytes
);
4971 for (i
= 0; i
< words
; i
++)
4972 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4974 ap
->hsm_task_state
= HSM_ST_LAST
;
4978 sg
= &qc
->__sg
[qc
->cursg
];
4981 offset
= sg
->offset
+ qc
->cursg_ofs
;
4983 /* get the current page and offset */
4984 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4985 offset
%= PAGE_SIZE
;
4987 /* don't overrun current sg */
4988 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4990 /* don't cross page boundaries */
4991 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4993 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4995 if (PageHighMem(page
)) {
4996 unsigned long flags
;
4998 /* FIXME: use bounce buffer */
4999 local_irq_save(flags
);
5000 buf
= kmap_atomic(page
, KM_IRQ0
);
5002 /* do the actual data transfer */
5003 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5005 kunmap_atomic(buf
, KM_IRQ0
);
5006 local_irq_restore(flags
);
5008 buf
= page_address(page
);
5009 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5013 qc
->curbytes
+= count
;
5014 qc
->cursg_ofs
+= count
;
5016 if (qc
->cursg_ofs
== sg
->length
) {
5026 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5027 * @qc: Command on going
5029 * Transfer Transfer data from/to the ATAPI device.
5032 * Inherited from caller.
5035 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5037 struct ata_port
*ap
= qc
->ap
;
5038 struct ata_device
*dev
= qc
->dev
;
5039 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5040 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5042 /* Abuse qc->result_tf for temp storage of intermediate TF
5043 * here to save some kernel stack usage.
5044 * For normal completion, qc->result_tf is not relevant. For
5045 * error, qc->result_tf is later overwritten by ata_qc_complete().
5046 * So, the correctness of qc->result_tf is not affected.
5048 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5049 ireason
= qc
->result_tf
.nsect
;
5050 bc_lo
= qc
->result_tf
.lbam
;
5051 bc_hi
= qc
->result_tf
.lbah
;
5052 bytes
= (bc_hi
<< 8) | bc_lo
;
5054 /* shall be cleared to zero, indicating xfer of data */
5055 if (ireason
& (1 << 0))
5058 /* make sure transfer direction matches expected */
5059 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5060 if (do_write
!= i_write
)
5063 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5065 __atapi_pio_bytes(qc
, bytes
);
5066 ata_altstatus(ap
); /* flush */
5071 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5072 qc
->err_mask
|= AC_ERR_HSM
;
5073 ap
->hsm_task_state
= HSM_ST_ERR
;
5077 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5078 * @ap: the target ata_port
5082 * 1 if ok in workqueue, 0 otherwise.
5085 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5087 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5090 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5091 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5092 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5095 if (is_atapi_taskfile(&qc
->tf
) &&
5096 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5104 * ata_hsm_qc_complete - finish a qc running on standard HSM
5105 * @qc: Command to complete
5106 * @in_wq: 1 if called from workqueue, 0 otherwise
5108 * Finish @qc which is running on standard HSM.
5111 * If @in_wq is zero, spin_lock_irqsave(host lock).
5112 * Otherwise, none on entry and grabs host lock.
5114 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5116 struct ata_port
*ap
= qc
->ap
;
5117 unsigned long flags
;
5119 if (ap
->ops
->error_handler
) {
5121 spin_lock_irqsave(ap
->lock
, flags
);
5123 /* EH might have kicked in while host lock is
5126 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5128 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5129 ap
->ops
->irq_on(ap
);
5130 ata_qc_complete(qc
);
5132 ata_port_freeze(ap
);
5135 spin_unlock_irqrestore(ap
->lock
, flags
);
5137 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5138 ata_qc_complete(qc
);
5140 ata_port_freeze(ap
);
5144 spin_lock_irqsave(ap
->lock
, flags
);
5145 ap
->ops
->irq_on(ap
);
5146 ata_qc_complete(qc
);
5147 spin_unlock_irqrestore(ap
->lock
, flags
);
5149 ata_qc_complete(qc
);
5154 * ata_hsm_move - move the HSM to the next state.
5155 * @ap: the target ata_port
5157 * @status: current device status
5158 * @in_wq: 1 if called from workqueue, 0 otherwise
5161 * 1 when poll next status needed, 0 otherwise.
5163 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5164 u8 status
, int in_wq
)
5166 unsigned long flags
= 0;
5169 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5171 /* Make sure ata_qc_issue_prot() does not throw things
5172 * like DMA polling into the workqueue. Notice that
5173 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5175 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5178 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5179 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5181 switch (ap
->hsm_task_state
) {
5183 /* Send first data block or PACKET CDB */
5185 /* If polling, we will stay in the work queue after
5186 * sending the data. Otherwise, interrupt handler
5187 * takes over after sending the data.
5189 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5191 /* check device status */
5192 if (unlikely((status
& ATA_DRQ
) == 0)) {
5193 /* handle BSY=0, DRQ=0 as error */
5194 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5195 /* device stops HSM for abort/error */
5196 qc
->err_mask
|= AC_ERR_DEV
;
5198 /* HSM violation. Let EH handle this */
5199 qc
->err_mask
|= AC_ERR_HSM
;
5201 ap
->hsm_task_state
= HSM_ST_ERR
;
5205 /* Device should not ask for data transfer (DRQ=1)
5206 * when it finds something wrong.
5207 * We ignore DRQ here and stop the HSM by
5208 * changing hsm_task_state to HSM_ST_ERR and
5209 * let the EH abort the command or reset the device.
5211 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5212 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5213 "error, dev_stat 0x%X\n", status
);
5214 qc
->err_mask
|= AC_ERR_HSM
;
5215 ap
->hsm_task_state
= HSM_ST_ERR
;
5219 /* Send the CDB (atapi) or the first data block (ata pio out).
5220 * During the state transition, interrupt handler shouldn't
5221 * be invoked before the data transfer is complete and
5222 * hsm_task_state is changed. Hence, the following locking.
5225 spin_lock_irqsave(ap
->lock
, flags
);
5227 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5228 /* PIO data out protocol.
5229 * send first data block.
5232 /* ata_pio_sectors() might change the state
5233 * to HSM_ST_LAST. so, the state is changed here
5234 * before ata_pio_sectors().
5236 ap
->hsm_task_state
= HSM_ST
;
5237 ata_pio_sectors(qc
);
5240 atapi_send_cdb(ap
, qc
);
5243 spin_unlock_irqrestore(ap
->lock
, flags
);
5245 /* if polling, ata_pio_task() handles the rest.
5246 * otherwise, interrupt handler takes over from here.
5251 /* complete command or read/write the data register */
5252 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5253 /* ATAPI PIO protocol */
5254 if ((status
& ATA_DRQ
) == 0) {
5255 /* No more data to transfer or device error.
5256 * Device error will be tagged in HSM_ST_LAST.
5258 ap
->hsm_task_state
= HSM_ST_LAST
;
5262 /* Device should not ask for data transfer (DRQ=1)
5263 * when it finds something wrong.
5264 * We ignore DRQ here and stop the HSM by
5265 * changing hsm_task_state to HSM_ST_ERR and
5266 * let the EH abort the command or reset the device.
5268 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5269 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5270 "device error, dev_stat 0x%X\n",
5272 qc
->err_mask
|= AC_ERR_HSM
;
5273 ap
->hsm_task_state
= HSM_ST_ERR
;
5277 atapi_pio_bytes(qc
);
5279 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5280 /* bad ireason reported by device */
5284 /* ATA PIO protocol */
5285 if (unlikely((status
& ATA_DRQ
) == 0)) {
5286 /* handle BSY=0, DRQ=0 as error */
5287 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5288 /* device stops HSM for abort/error */
5289 qc
->err_mask
|= AC_ERR_DEV
;
5291 /* HSM violation. Let EH handle this.
5292 * Phantom devices also trigger this
5293 * condition. Mark hint.
5295 qc
->err_mask
|= AC_ERR_HSM
|
5298 ap
->hsm_task_state
= HSM_ST_ERR
;
5302 /* For PIO reads, some devices may ask for
5303 * data transfer (DRQ=1) alone with ERR=1.
5304 * We respect DRQ here and transfer one
5305 * block of junk data before changing the
5306 * hsm_task_state to HSM_ST_ERR.
5308 * For PIO writes, ERR=1 DRQ=1 doesn't make
5309 * sense since the data block has been
5310 * transferred to the device.
5312 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5313 /* data might be corrputed */
5314 qc
->err_mask
|= AC_ERR_DEV
;
5316 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5317 ata_pio_sectors(qc
);
5318 status
= ata_wait_idle(ap
);
5321 if (status
& (ATA_BUSY
| ATA_DRQ
))
5322 qc
->err_mask
|= AC_ERR_HSM
;
5324 /* ata_pio_sectors() might change the
5325 * state to HSM_ST_LAST. so, the state
5326 * is changed after ata_pio_sectors().
5328 ap
->hsm_task_state
= HSM_ST_ERR
;
5332 ata_pio_sectors(qc
);
5334 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5335 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5337 status
= ata_wait_idle(ap
);
5346 if (unlikely(!ata_ok(status
))) {
5347 qc
->err_mask
|= __ac_err_mask(status
);
5348 ap
->hsm_task_state
= HSM_ST_ERR
;
5352 /* no more data to transfer */
5353 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5354 ap
->print_id
, qc
->dev
->devno
, status
);
5356 WARN_ON(qc
->err_mask
);
5358 ap
->hsm_task_state
= HSM_ST_IDLE
;
5360 /* complete taskfile transaction */
5361 ata_hsm_qc_complete(qc
, in_wq
);
5367 /* make sure qc->err_mask is available to
5368 * know what's wrong and recover
5370 WARN_ON(qc
->err_mask
== 0);
5372 ap
->hsm_task_state
= HSM_ST_IDLE
;
5374 /* complete taskfile transaction */
5375 ata_hsm_qc_complete(qc
, in_wq
);
5387 static void ata_pio_task(struct work_struct
*work
)
5389 struct ata_port
*ap
=
5390 container_of(work
, struct ata_port
, port_task
.work
);
5391 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5396 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5399 * This is purely heuristic. This is a fast path.
5400 * Sometimes when we enter, BSY will be cleared in
5401 * a chk-status or two. If not, the drive is probably seeking
5402 * or something. Snooze for a couple msecs, then
5403 * chk-status again. If still busy, queue delayed work.
5405 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5406 if (status
& ATA_BUSY
) {
5408 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5409 if (status
& ATA_BUSY
) {
5410 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5416 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5418 /* another command or interrupt handler
5419 * may be running at this point.
5426 * ata_qc_new - Request an available ATA command, for queueing
5427 * @ap: Port associated with device @dev
5428 * @dev: Device from whom we request an available command structure
5434 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5436 struct ata_queued_cmd
*qc
= NULL
;
5439 /* no command while frozen */
5440 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5443 /* the last tag is reserved for internal command. */
5444 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5445 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5446 qc
= __ata_qc_from_tag(ap
, i
);
5457 * ata_qc_new_init - Request an available ATA command, and initialize it
5458 * @dev: Device from whom we request an available command structure
5464 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5466 struct ata_port
*ap
= dev
->link
->ap
;
5467 struct ata_queued_cmd
*qc
;
5469 qc
= ata_qc_new(ap
);
5482 * ata_qc_free - free unused ata_queued_cmd
5483 * @qc: Command to complete
5485 * Designed to free unused ata_queued_cmd object
5486 * in case something prevents using it.
5489 * spin_lock_irqsave(host lock)
5491 void ata_qc_free(struct ata_queued_cmd
*qc
)
5493 struct ata_port
*ap
= qc
->ap
;
5496 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5500 if (likely(ata_tag_valid(tag
))) {
5501 qc
->tag
= ATA_TAG_POISON
;
5502 clear_bit(tag
, &ap
->qc_allocated
);
5506 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5508 struct ata_port
*ap
= qc
->ap
;
5509 struct ata_link
*link
= qc
->dev
->link
;
5511 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5512 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5514 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5517 /* command should be marked inactive atomically with qc completion */
5518 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5519 link
->sactive
&= ~(1 << qc
->tag
);
5521 ap
->nr_active_links
--;
5523 link
->active_tag
= ATA_TAG_POISON
;
5524 ap
->nr_active_links
--;
5527 /* clear exclusive status */
5528 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5529 ap
->excl_link
== link
))
5530 ap
->excl_link
= NULL
;
5532 /* atapi: mark qc as inactive to prevent the interrupt handler
5533 * from completing the command twice later, before the error handler
5534 * is called. (when rc != 0 and atapi request sense is needed)
5536 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5537 ap
->qc_active
&= ~(1 << qc
->tag
);
5539 /* call completion callback */
5540 qc
->complete_fn(qc
);
5543 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5545 struct ata_port
*ap
= qc
->ap
;
5547 qc
->result_tf
.flags
= qc
->tf
.flags
;
5548 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5552 * ata_qc_complete - Complete an active ATA command
5553 * @qc: Command to complete
5554 * @err_mask: ATA Status register contents
5556 * Indicate to the mid and upper layers that an ATA
5557 * command has completed, with either an ok or not-ok status.
5560 * spin_lock_irqsave(host lock)
5562 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5564 struct ata_port
*ap
= qc
->ap
;
5566 /* XXX: New EH and old EH use different mechanisms to
5567 * synchronize EH with regular execution path.
5569 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5570 * Normal execution path is responsible for not accessing a
5571 * failed qc. libata core enforces the rule by returning NULL
5572 * from ata_qc_from_tag() for failed qcs.
5574 * Old EH depends on ata_qc_complete() nullifying completion
5575 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5576 * not synchronize with interrupt handler. Only PIO task is
5579 if (ap
->ops
->error_handler
) {
5580 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5582 if (unlikely(qc
->err_mask
))
5583 qc
->flags
|= ATA_QCFLAG_FAILED
;
5585 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5586 if (!ata_tag_internal(qc
->tag
)) {
5587 /* always fill result TF for failed qc */
5589 ata_qc_schedule_eh(qc
);
5594 /* read result TF if requested */
5595 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5598 __ata_qc_complete(qc
);
5600 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5603 /* read result TF if failed or requested */
5604 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5607 __ata_qc_complete(qc
);
5612 * ata_qc_complete_multiple - Complete multiple qcs successfully
5613 * @ap: port in question
5614 * @qc_active: new qc_active mask
5615 * @finish_qc: LLDD callback invoked before completing a qc
5617 * Complete in-flight commands. This functions is meant to be
5618 * called from low-level driver's interrupt routine to complete
5619 * requests normally. ap->qc_active and @qc_active is compared
5620 * and commands are completed accordingly.
5623 * spin_lock_irqsave(host lock)
5626 * Number of completed commands on success, -errno otherwise.
5628 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5629 void (*finish_qc
)(struct ata_queued_cmd
*))
5635 done_mask
= ap
->qc_active
^ qc_active
;
5637 if (unlikely(done_mask
& qc_active
)) {
5638 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5639 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5643 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5644 struct ata_queued_cmd
*qc
;
5646 if (!(done_mask
& (1 << i
)))
5649 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5652 ata_qc_complete(qc
);
5660 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5662 struct ata_port
*ap
= qc
->ap
;
5664 switch (qc
->tf
.protocol
) {
5667 case ATA_PROT_ATAPI_DMA
:
5670 case ATA_PROT_ATAPI
:
5672 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5685 * ata_qc_issue - issue taskfile to device
5686 * @qc: command to issue to device
5688 * Prepare an ATA command to submission to device.
5689 * This includes mapping the data into a DMA-able
5690 * area, filling in the S/G table, and finally
5691 * writing the taskfile to hardware, starting the command.
5694 * spin_lock_irqsave(host lock)
5696 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5698 struct ata_port
*ap
= qc
->ap
;
5699 struct ata_link
*link
= qc
->dev
->link
;
5701 /* Make sure only one non-NCQ command is outstanding. The
5702 * check is skipped for old EH because it reuses active qc to
5703 * request ATAPI sense.
5705 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5707 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5708 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5711 ap
->nr_active_links
++;
5712 link
->sactive
|= 1 << qc
->tag
;
5714 WARN_ON(link
->sactive
);
5716 ap
->nr_active_links
++;
5717 link
->active_tag
= qc
->tag
;
5720 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5721 ap
->qc_active
|= 1 << qc
->tag
;
5723 if (ata_should_dma_map(qc
)) {
5724 if (qc
->flags
& ATA_QCFLAG_SG
) {
5725 if (ata_sg_setup(qc
))
5727 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5728 if (ata_sg_setup_one(qc
))
5732 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5735 ap
->ops
->qc_prep(qc
);
5737 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5738 if (unlikely(qc
->err_mask
))
5743 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5744 qc
->err_mask
|= AC_ERR_SYSTEM
;
5746 ata_qc_complete(qc
);
5750 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5751 * @qc: command to issue to device
5753 * Using various libata functions and hooks, this function
5754 * starts an ATA command. ATA commands are grouped into
5755 * classes called "protocols", and issuing each type of protocol
5756 * is slightly different.
5758 * May be used as the qc_issue() entry in ata_port_operations.
5761 * spin_lock_irqsave(host lock)
5764 * Zero on success, AC_ERR_* mask on failure
5767 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5769 struct ata_port
*ap
= qc
->ap
;
5771 /* Use polling pio if the LLD doesn't handle
5772 * interrupt driven pio and atapi CDB interrupt.
5774 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5775 switch (qc
->tf
.protocol
) {
5777 case ATA_PROT_NODATA
:
5778 case ATA_PROT_ATAPI
:
5779 case ATA_PROT_ATAPI_NODATA
:
5780 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5782 case ATA_PROT_ATAPI_DMA
:
5783 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5784 /* see ata_dma_blacklisted() */
5792 /* select the device */
5793 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5795 /* start the command */
5796 switch (qc
->tf
.protocol
) {
5797 case ATA_PROT_NODATA
:
5798 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5799 ata_qc_set_polling(qc
);
5801 ata_tf_to_host(ap
, &qc
->tf
);
5802 ap
->hsm_task_state
= HSM_ST_LAST
;
5804 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5805 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5810 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5812 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5813 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5814 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5815 ap
->hsm_task_state
= HSM_ST_LAST
;
5819 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5820 ata_qc_set_polling(qc
);
5822 ata_tf_to_host(ap
, &qc
->tf
);
5824 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5825 /* PIO data out protocol */
5826 ap
->hsm_task_state
= HSM_ST_FIRST
;
5827 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5829 /* always send first data block using
5830 * the ata_pio_task() codepath.
5833 /* PIO data in protocol */
5834 ap
->hsm_task_state
= HSM_ST
;
5836 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5837 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5839 /* if polling, ata_pio_task() handles the rest.
5840 * otherwise, interrupt handler takes over from here.
5846 case ATA_PROT_ATAPI
:
5847 case ATA_PROT_ATAPI_NODATA
:
5848 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5849 ata_qc_set_polling(qc
);
5851 ata_tf_to_host(ap
, &qc
->tf
);
5853 ap
->hsm_task_state
= HSM_ST_FIRST
;
5855 /* send cdb by polling if no cdb interrupt */
5856 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5857 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5858 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5861 case ATA_PROT_ATAPI_DMA
:
5862 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5864 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5865 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5866 ap
->hsm_task_state
= HSM_ST_FIRST
;
5868 /* send cdb by polling if no cdb interrupt */
5869 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5870 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5875 return AC_ERR_SYSTEM
;
5882 * ata_host_intr - Handle host interrupt for given (port, task)
5883 * @ap: Port on which interrupt arrived (possibly...)
5884 * @qc: Taskfile currently active in engine
5886 * Handle host interrupt for given queued command. Currently,
5887 * only DMA interrupts are handled. All other commands are
5888 * handled via polling with interrupts disabled (nIEN bit).
5891 * spin_lock_irqsave(host lock)
5894 * One if interrupt was handled, zero if not (shared irq).
5897 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5898 struct ata_queued_cmd
*qc
)
5900 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5901 u8 status
, host_stat
= 0;
5903 VPRINTK("ata%u: protocol %d task_state %d\n",
5904 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5906 /* Check whether we are expecting interrupt in this state */
5907 switch (ap
->hsm_task_state
) {
5909 /* Some pre-ATAPI-4 devices assert INTRQ
5910 * at this state when ready to receive CDB.
5913 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5914 * The flag was turned on only for atapi devices.
5915 * No need to check is_atapi_taskfile(&qc->tf) again.
5917 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5921 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5922 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5923 /* check status of DMA engine */
5924 host_stat
= ap
->ops
->bmdma_status(ap
);
5925 VPRINTK("ata%u: host_stat 0x%X\n",
5926 ap
->print_id
, host_stat
);
5928 /* if it's not our irq... */
5929 if (!(host_stat
& ATA_DMA_INTR
))
5932 /* before we do anything else, clear DMA-Start bit */
5933 ap
->ops
->bmdma_stop(qc
);
5935 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5936 /* error when transfering data to/from memory */
5937 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5938 ap
->hsm_task_state
= HSM_ST_ERR
;
5948 /* check altstatus */
5949 status
= ata_altstatus(ap
);
5950 if (status
& ATA_BUSY
)
5953 /* check main status, clearing INTRQ */
5954 status
= ata_chk_status(ap
);
5955 if (unlikely(status
& ATA_BUSY
))
5958 /* ack bmdma irq events */
5959 ap
->ops
->irq_clear(ap
);
5961 ata_hsm_move(ap
, qc
, status
, 0);
5963 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5964 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5965 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5967 return 1; /* irq handled */
5970 ap
->stats
.idle_irq
++;
5973 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5975 ap
->ops
->irq_clear(ap
);
5976 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5980 return 0; /* irq not handled */
5984 * ata_interrupt - Default ATA host interrupt handler
5985 * @irq: irq line (unused)
5986 * @dev_instance: pointer to our ata_host information structure
5988 * Default interrupt handler for PCI IDE devices. Calls
5989 * ata_host_intr() for each port that is not disabled.
5992 * Obtains host lock during operation.
5995 * IRQ_NONE or IRQ_HANDLED.
5998 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
6000 struct ata_host
*host
= dev_instance
;
6002 unsigned int handled
= 0;
6003 unsigned long flags
;
6005 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6006 spin_lock_irqsave(&host
->lock
, flags
);
6008 for (i
= 0; i
< host
->n_ports
; i
++) {
6009 struct ata_port
*ap
;
6011 ap
= host
->ports
[i
];
6013 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6014 struct ata_queued_cmd
*qc
;
6016 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6017 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6018 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6019 handled
|= ata_host_intr(ap
, qc
);
6023 spin_unlock_irqrestore(&host
->lock
, flags
);
6025 return IRQ_RETVAL(handled
);
6029 * sata_scr_valid - test whether SCRs are accessible
6030 * @link: ATA link to test SCR accessibility for
6032 * Test whether SCRs are accessible for @link.
6038 * 1 if SCRs are accessible, 0 otherwise.
6040 int sata_scr_valid(struct ata_link
*link
)
6042 struct ata_port
*ap
= link
->ap
;
6044 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6048 * sata_scr_read - read SCR register of the specified port
6049 * @link: ATA link to read SCR for
6051 * @val: Place to store read value
6053 * Read SCR register @reg of @link into *@val. This function is
6054 * guaranteed to succeed if @link is ap->link, the cable type of
6055 * the port is SATA and the port implements ->scr_read.
6058 * None if @link is ap->link. Kernel thread context otherwise.
6061 * 0 on success, negative errno on failure.
6063 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6065 if (ata_is_host_link(link
)) {
6066 struct ata_port
*ap
= link
->ap
;
6068 if (sata_scr_valid(link
))
6069 return ap
->ops
->scr_read(ap
, reg
, val
);
6073 return sata_pmp_scr_read(link
, reg
, val
);
6077 * sata_scr_write - write SCR register of the specified port
6078 * @link: ATA link to write SCR for
6079 * @reg: SCR to write
6080 * @val: value to write
6082 * Write @val to SCR register @reg of @link. This function is
6083 * guaranteed to succeed if @link is ap->link, the cable type of
6084 * the port is SATA and the port implements ->scr_read.
6087 * None if @link is ap->link. Kernel thread context otherwise.
6090 * 0 on success, negative errno on failure.
6092 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6094 if (ata_is_host_link(link
)) {
6095 struct ata_port
*ap
= link
->ap
;
6097 if (sata_scr_valid(link
))
6098 return ap
->ops
->scr_write(ap
, reg
, val
);
6102 return sata_pmp_scr_write(link
, reg
, val
);
6106 * sata_scr_write_flush - write SCR register of the specified port and flush
6107 * @link: ATA link to write SCR for
6108 * @reg: SCR to write
6109 * @val: value to write
6111 * This function is identical to sata_scr_write() except that this
6112 * function performs flush after writing to the register.
6115 * None if @link is ap->link. Kernel thread context otherwise.
6118 * 0 on success, negative errno on failure.
6120 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6122 if (ata_is_host_link(link
)) {
6123 struct ata_port
*ap
= link
->ap
;
6126 if (sata_scr_valid(link
)) {
6127 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6129 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6135 return sata_pmp_scr_write(link
, reg
, val
);
6139 * ata_link_online - test whether the given link is online
6140 * @link: ATA link to test
6142 * Test whether @link is online. Note that this function returns
6143 * 0 if online status of @link cannot be obtained, so
6144 * ata_link_online(link) != !ata_link_offline(link).
6150 * 1 if the port online status is available and online.
6152 int ata_link_online(struct ata_link
*link
)
6156 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6157 (sstatus
& 0xf) == 0x3)
6163 * ata_link_offline - test whether the given link is offline
6164 * @link: ATA link to test
6166 * Test whether @link is offline. Note that this function
6167 * returns 0 if offline status of @link cannot be obtained, so
6168 * ata_link_online(link) != !ata_link_offline(link).
6174 * 1 if the port offline status is available and offline.
6176 int ata_link_offline(struct ata_link
*link
)
6180 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6181 (sstatus
& 0xf) != 0x3)
6186 int ata_flush_cache(struct ata_device
*dev
)
6188 unsigned int err_mask
;
6191 if (!ata_try_flush_cache(dev
))
6194 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6195 cmd
= ATA_CMD_FLUSH_EXT
;
6197 cmd
= ATA_CMD_FLUSH
;
6199 /* This is wrong. On a failed flush we get back the LBA of the lost
6200 sector and we should (assuming it wasn't aborted as unknown) issue
6201 a further flush command to continue the writeback until it
6203 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6205 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6213 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6214 unsigned int action
, unsigned int ehi_flags
,
6217 unsigned long flags
;
6220 for (i
= 0; i
< host
->n_ports
; i
++) {
6221 struct ata_port
*ap
= host
->ports
[i
];
6222 struct ata_link
*link
;
6224 /* Previous resume operation might still be in
6225 * progress. Wait for PM_PENDING to clear.
6227 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6228 ata_port_wait_eh(ap
);
6229 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6232 /* request PM ops to EH */
6233 spin_lock_irqsave(ap
->lock
, flags
);
6238 ap
->pm_result
= &rc
;
6241 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6242 __ata_port_for_each_link(link
, ap
) {
6243 link
->eh_info
.action
|= action
;
6244 link
->eh_info
.flags
|= ehi_flags
;
6247 ata_port_schedule_eh(ap
);
6249 spin_unlock_irqrestore(ap
->lock
, flags
);
6251 /* wait and check result */
6253 ata_port_wait_eh(ap
);
6254 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6264 * ata_host_suspend - suspend host
6265 * @host: host to suspend
6268 * Suspend @host. Actual operation is performed by EH. This
6269 * function requests EH to perform PM operations and waits for EH
6273 * Kernel thread context (may sleep).
6276 * 0 on success, -errno on failure.
6278 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6282 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6284 host
->dev
->power
.power_state
= mesg
;
6289 * ata_host_resume - resume host
6290 * @host: host to resume
6292 * Resume @host. Actual operation is performed by EH. This
6293 * function requests EH to perform PM operations and returns.
6294 * Note that all resume operations are performed parallely.
6297 * Kernel thread context (may sleep).
6299 void ata_host_resume(struct ata_host
*host
)
6301 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6302 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6303 host
->dev
->power
.power_state
= PMSG_ON
;
6308 * ata_port_start - Set port up for dma.
6309 * @ap: Port to initialize
6311 * Called just after data structures for each port are
6312 * initialized. Allocates space for PRD table.
6314 * May be used as the port_start() entry in ata_port_operations.
6317 * Inherited from caller.
6319 int ata_port_start(struct ata_port
*ap
)
6321 struct device
*dev
= ap
->dev
;
6324 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6329 rc
= ata_pad_alloc(ap
, dev
);
6333 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6334 (unsigned long long)ap
->prd_dma
);
6339 * ata_dev_init - Initialize an ata_device structure
6340 * @dev: Device structure to initialize
6342 * Initialize @dev in preparation for probing.
6345 * Inherited from caller.
6347 void ata_dev_init(struct ata_device
*dev
)
6349 struct ata_link
*link
= dev
->link
;
6350 struct ata_port
*ap
= link
->ap
;
6351 unsigned long flags
;
6353 /* SATA spd limit is bound to the first device */
6354 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6357 /* High bits of dev->flags are used to record warm plug
6358 * requests which occur asynchronously. Synchronize using
6361 spin_lock_irqsave(ap
->lock
, flags
);
6362 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6364 spin_unlock_irqrestore(ap
->lock
, flags
);
6366 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6367 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6368 dev
->pio_mask
= UINT_MAX
;
6369 dev
->mwdma_mask
= UINT_MAX
;
6370 dev
->udma_mask
= UINT_MAX
;
6374 * ata_link_init - Initialize an ata_link structure
6375 * @ap: ATA port link is attached to
6376 * @link: Link structure to initialize
6377 * @pmp: Port multiplier port number
6382 * Kernel thread context (may sleep)
6384 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6388 /* clear everything except for devices */
6389 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6393 link
->active_tag
= ATA_TAG_POISON
;
6394 link
->hw_sata_spd_limit
= UINT_MAX
;
6396 /* can't use iterator, ap isn't initialized yet */
6397 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6398 struct ata_device
*dev
= &link
->device
[i
];
6401 dev
->devno
= dev
- link
->device
;
6407 * sata_link_init_spd - Initialize link->sata_spd_limit
6408 * @link: Link to configure sata_spd_limit for
6410 * Initialize @link->[hw_]sata_spd_limit to the currently
6414 * Kernel thread context (may sleep).
6417 * 0 on success, -errno on failure.
6419 int sata_link_init_spd(struct ata_link
*link
)
6424 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6428 spd
= (scontrol
>> 4) & 0xf;
6430 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6432 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6438 * ata_port_alloc - allocate and initialize basic ATA port resources
6439 * @host: ATA host this allocated port belongs to
6441 * Allocate and initialize basic ATA port resources.
6444 * Allocate ATA port on success, NULL on failure.
6447 * Inherited from calling layer (may sleep).
6449 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6451 struct ata_port
*ap
;
6455 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6459 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6460 ap
->lock
= &host
->lock
;
6461 ap
->flags
= ATA_FLAG_DISABLED
;
6463 ap
->ctl
= ATA_DEVCTL_OBS
;
6465 ap
->dev
= host
->dev
;
6466 ap
->last_ctl
= 0xFF;
6468 #if defined(ATA_VERBOSE_DEBUG)
6469 /* turn on all debugging levels */
6470 ap
->msg_enable
= 0x00FF;
6471 #elif defined(ATA_DEBUG)
6472 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6474 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6477 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6478 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6479 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6480 INIT_LIST_HEAD(&ap
->eh_done_q
);
6481 init_waitqueue_head(&ap
->eh_wait_q
);
6482 init_timer_deferrable(&ap
->fastdrain_timer
);
6483 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6484 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6486 ap
->cbl
= ATA_CBL_NONE
;
6488 ata_link_init(ap
, &ap
->link
, 0);
6491 ap
->stats
.unhandled_irq
= 1;
6492 ap
->stats
.idle_irq
= 1;
6497 static void ata_host_release(struct device
*gendev
, void *res
)
6499 struct ata_host
*host
= dev_get_drvdata(gendev
);
6502 for (i
= 0; i
< host
->n_ports
; i
++) {
6503 struct ata_port
*ap
= host
->ports
[i
];
6508 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6509 ap
->ops
->port_stop(ap
);
6512 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6513 host
->ops
->host_stop(host
);
6515 for (i
= 0; i
< host
->n_ports
; i
++) {
6516 struct ata_port
*ap
= host
->ports
[i
];
6522 scsi_host_put(ap
->scsi_host
);
6524 kfree(ap
->pmp_link
);
6526 host
->ports
[i
] = NULL
;
6529 dev_set_drvdata(gendev
, NULL
);
6533 * ata_host_alloc - allocate and init basic ATA host resources
6534 * @dev: generic device this host is associated with
6535 * @max_ports: maximum number of ATA ports associated with this host
6537 * Allocate and initialize basic ATA host resources. LLD calls
6538 * this function to allocate a host, initializes it fully and
6539 * attaches it using ata_host_register().
6541 * @max_ports ports are allocated and host->n_ports is
6542 * initialized to @max_ports. The caller is allowed to decrease
6543 * host->n_ports before calling ata_host_register(). The unused
6544 * ports will be automatically freed on registration.
6547 * Allocate ATA host on success, NULL on failure.
6550 * Inherited from calling layer (may sleep).
6552 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6554 struct ata_host
*host
;
6560 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6563 /* alloc a container for our list of ATA ports (buses) */
6564 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6565 /* alloc a container for our list of ATA ports (buses) */
6566 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6570 devres_add(dev
, host
);
6571 dev_set_drvdata(dev
, host
);
6573 spin_lock_init(&host
->lock
);
6575 host
->n_ports
= max_ports
;
6577 /* allocate ports bound to this host */
6578 for (i
= 0; i
< max_ports
; i
++) {
6579 struct ata_port
*ap
;
6581 ap
= ata_port_alloc(host
);
6586 host
->ports
[i
] = ap
;
6589 devres_remove_group(dev
, NULL
);
6593 devres_release_group(dev
, NULL
);
6598 * ata_host_alloc_pinfo - alloc host and init with port_info array
6599 * @dev: generic device this host is associated with
6600 * @ppi: array of ATA port_info to initialize host with
6601 * @n_ports: number of ATA ports attached to this host
6603 * Allocate ATA host and initialize with info from @ppi. If NULL
6604 * terminated, @ppi may contain fewer entries than @n_ports. The
6605 * last entry will be used for the remaining ports.
6608 * Allocate ATA host on success, NULL on failure.
6611 * Inherited from calling layer (may sleep).
6613 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6614 const struct ata_port_info
* const * ppi
,
6617 const struct ata_port_info
*pi
;
6618 struct ata_host
*host
;
6621 host
= ata_host_alloc(dev
, n_ports
);
6625 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6626 struct ata_port
*ap
= host
->ports
[i
];
6631 ap
->pio_mask
= pi
->pio_mask
;
6632 ap
->mwdma_mask
= pi
->mwdma_mask
;
6633 ap
->udma_mask
= pi
->udma_mask
;
6634 ap
->flags
|= pi
->flags
;
6635 ap
->link
.flags
|= pi
->link_flags
;
6636 ap
->ops
= pi
->port_ops
;
6638 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6639 host
->ops
= pi
->port_ops
;
6640 if (!host
->private_data
&& pi
->private_data
)
6641 host
->private_data
= pi
->private_data
;
6648 * ata_host_start - start and freeze ports of an ATA host
6649 * @host: ATA host to start ports for
6651 * Start and then freeze ports of @host. Started status is
6652 * recorded in host->flags, so this function can be called
6653 * multiple times. Ports are guaranteed to get started only
6654 * once. If host->ops isn't initialized yet, its set to the
6655 * first non-dummy port ops.
6658 * Inherited from calling layer (may sleep).
6661 * 0 if all ports are started successfully, -errno otherwise.
6663 int ata_host_start(struct ata_host
*host
)
6667 if (host
->flags
& ATA_HOST_STARTED
)
6670 for (i
= 0; i
< host
->n_ports
; i
++) {
6671 struct ata_port
*ap
= host
->ports
[i
];
6673 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6674 host
->ops
= ap
->ops
;
6676 if (ap
->ops
->port_start
) {
6677 rc
= ap
->ops
->port_start(ap
);
6679 ata_port_printk(ap
, KERN_ERR
, "failed to "
6680 "start port (errno=%d)\n", rc
);
6685 ata_eh_freeze_port(ap
);
6688 host
->flags
|= ATA_HOST_STARTED
;
6693 struct ata_port
*ap
= host
->ports
[i
];
6695 if (ap
->ops
->port_stop
)
6696 ap
->ops
->port_stop(ap
);
6702 * ata_sas_host_init - Initialize a host struct
6703 * @host: host to initialize
6704 * @dev: device host is attached to
6705 * @flags: host flags
6709 * PCI/etc. bus probe sem.
6712 /* KILLME - the only user left is ipr */
6713 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6714 unsigned long flags
, const struct ata_port_operations
*ops
)
6716 spin_lock_init(&host
->lock
);
6718 host
->flags
= flags
;
6723 * ata_host_register - register initialized ATA host
6724 * @host: ATA host to register
6725 * @sht: template for SCSI host
6727 * Register initialized ATA host. @host is allocated using
6728 * ata_host_alloc() and fully initialized by LLD. This function
6729 * starts ports, registers @host with ATA and SCSI layers and
6730 * probe registered devices.
6733 * Inherited from calling layer (may sleep).
6736 * 0 on success, -errno otherwise.
6738 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6742 /* host must have been started */
6743 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6744 dev_printk(KERN_ERR
, host
->dev
,
6745 "BUG: trying to register unstarted host\n");
6750 /* Blow away unused ports. This happens when LLD can't
6751 * determine the exact number of ports to allocate at
6754 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6755 kfree(host
->ports
[i
]);
6757 /* give ports names and add SCSI hosts */
6758 for (i
= 0; i
< host
->n_ports
; i
++)
6759 host
->ports
[i
]->print_id
= ata_print_id
++;
6761 rc
= ata_scsi_add_hosts(host
, sht
);
6765 /* associate with ACPI nodes */
6766 ata_acpi_associate(host
);
6768 /* set cable, sata_spd_limit and report */
6769 for (i
= 0; i
< host
->n_ports
; i
++) {
6770 struct ata_port
*ap
= host
->ports
[i
];
6771 unsigned long xfer_mask
;
6773 /* set SATA cable type if still unset */
6774 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6775 ap
->cbl
= ATA_CBL_SATA
;
6777 /* init sata_spd_limit to the current value */
6778 sata_link_init_spd(&ap
->link
);
6780 /* print per-port info to dmesg */
6781 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6784 if (!ata_port_is_dummy(ap
)) {
6785 ata_port_printk(ap
, KERN_INFO
,
6786 "%cATA max %s %s\n",
6787 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6788 ata_mode_string(xfer_mask
),
6789 ap
->link
.eh_info
.desc
);
6790 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6792 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6795 /* perform each probe synchronously */
6796 DPRINTK("probe begin\n");
6797 for (i
= 0; i
< host
->n_ports
; i
++) {
6798 struct ata_port
*ap
= host
->ports
[i
];
6802 if (ap
->ops
->error_handler
) {
6803 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6804 unsigned long flags
;
6808 /* kick EH for boot probing */
6809 spin_lock_irqsave(ap
->lock
, flags
);
6812 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6813 ehi
->action
|= ATA_EH_SOFTRESET
;
6814 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6816 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6817 ap
->pflags
|= ATA_PFLAG_LOADING
;
6818 ata_port_schedule_eh(ap
);
6820 spin_unlock_irqrestore(ap
->lock
, flags
);
6822 /* wait for EH to finish */
6823 ata_port_wait_eh(ap
);
6825 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6826 rc
= ata_bus_probe(ap
);
6827 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6830 /* FIXME: do something useful here?
6831 * Current libata behavior will
6832 * tear down everything when
6833 * the module is removed
6834 * or the h/w is unplugged.
6840 /* probes are done, now scan each port's disk(s) */
6841 DPRINTK("host probe begin\n");
6842 for (i
= 0; i
< host
->n_ports
; i
++) {
6843 struct ata_port
*ap
= host
->ports
[i
];
6845 ata_scsi_scan_host(ap
, 1);
6852 * ata_host_activate - start host, request IRQ and register it
6853 * @host: target ATA host
6854 * @irq: IRQ to request
6855 * @irq_handler: irq_handler used when requesting IRQ
6856 * @irq_flags: irq_flags used when requesting IRQ
6857 * @sht: scsi_host_template to use when registering the host
6859 * After allocating an ATA host and initializing it, most libata
6860 * LLDs perform three steps to activate the host - start host,
6861 * request IRQ and register it. This helper takes necessasry
6862 * arguments and performs the three steps in one go.
6865 * Inherited from calling layer (may sleep).
6868 * 0 on success, -errno otherwise.
6870 int ata_host_activate(struct ata_host
*host
, int irq
,
6871 irq_handler_t irq_handler
, unsigned long irq_flags
,
6872 struct scsi_host_template
*sht
)
6876 rc
= ata_host_start(host
);
6880 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6881 dev_driver_string(host
->dev
), host
);
6885 for (i
= 0; i
< host
->n_ports
; i
++)
6886 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6888 rc
= ata_host_register(host
, sht
);
6889 /* if failed, just free the IRQ and leave ports alone */
6891 devm_free_irq(host
->dev
, irq
, host
);
6897 * ata_port_detach - Detach ATA port in prepration of device removal
6898 * @ap: ATA port to be detached
6900 * Detach all ATA devices and the associated SCSI devices of @ap;
6901 * then, remove the associated SCSI host. @ap is guaranteed to
6902 * be quiescent on return from this function.
6905 * Kernel thread context (may sleep).
6907 void ata_port_detach(struct ata_port
*ap
)
6909 unsigned long flags
;
6910 struct ata_link
*link
;
6911 struct ata_device
*dev
;
6913 if (!ap
->ops
->error_handler
)
6916 /* tell EH we're leaving & flush EH */
6917 spin_lock_irqsave(ap
->lock
, flags
);
6918 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6919 spin_unlock_irqrestore(ap
->lock
, flags
);
6921 ata_port_wait_eh(ap
);
6923 /* EH is now guaranteed to see UNLOADING, so no new device
6924 * will be attached. Disable all existing devices.
6926 spin_lock_irqsave(ap
->lock
, flags
);
6928 ata_port_for_each_link(link
, ap
) {
6929 ata_link_for_each_dev(dev
, link
)
6930 ata_dev_disable(dev
);
6933 spin_unlock_irqrestore(ap
->lock
, flags
);
6935 /* Final freeze & EH. All in-flight commands are aborted. EH
6936 * will be skipped and retrials will be terminated with bad
6939 spin_lock_irqsave(ap
->lock
, flags
);
6940 ata_port_freeze(ap
); /* won't be thawed */
6941 spin_unlock_irqrestore(ap
->lock
, flags
);
6943 ata_port_wait_eh(ap
);
6944 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6947 /* remove the associated SCSI host */
6948 scsi_remove_host(ap
->scsi_host
);
6952 * ata_host_detach - Detach all ports of an ATA host
6953 * @host: Host to detach
6955 * Detach all ports of @host.
6958 * Kernel thread context (may sleep).
6960 void ata_host_detach(struct ata_host
*host
)
6964 for (i
= 0; i
< host
->n_ports
; i
++)
6965 ata_port_detach(host
->ports
[i
]);
6969 * ata_std_ports - initialize ioaddr with standard port offsets.
6970 * @ioaddr: IO address structure to be initialized
6972 * Utility function which initializes data_addr, error_addr,
6973 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6974 * device_addr, status_addr, and command_addr to standard offsets
6975 * relative to cmd_addr.
6977 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6980 void ata_std_ports(struct ata_ioports
*ioaddr
)
6982 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6983 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6984 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6985 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6986 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6987 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6988 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6989 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6990 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6991 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6998 * ata_pci_remove_one - PCI layer callback for device removal
6999 * @pdev: PCI device that was removed
7001 * PCI layer indicates to libata via this hook that hot-unplug or
7002 * module unload event has occurred. Detach all ports. Resource
7003 * release is handled via devres.
7006 * Inherited from PCI layer (may sleep).
7008 void ata_pci_remove_one(struct pci_dev
*pdev
)
7010 struct device
*dev
= pci_dev_to_dev(pdev
);
7011 struct ata_host
*host
= dev_get_drvdata(dev
);
7013 ata_host_detach(host
);
7016 /* move to PCI subsystem */
7017 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7019 unsigned long tmp
= 0;
7021 switch (bits
->width
) {
7024 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7030 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7036 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7047 return (tmp
== bits
->val
) ? 1 : 0;
7051 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7053 pci_save_state(pdev
);
7054 pci_disable_device(pdev
);
7056 if (mesg
.event
== PM_EVENT_SUSPEND
)
7057 pci_set_power_state(pdev
, PCI_D3hot
);
7060 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7064 pci_set_power_state(pdev
, PCI_D0
);
7065 pci_restore_state(pdev
);
7067 rc
= pcim_enable_device(pdev
);
7069 dev_printk(KERN_ERR
, &pdev
->dev
,
7070 "failed to enable device after resume (%d)\n", rc
);
7074 pci_set_master(pdev
);
7078 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7080 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7083 rc
= ata_host_suspend(host
, mesg
);
7087 ata_pci_device_do_suspend(pdev
, mesg
);
7092 int ata_pci_device_resume(struct pci_dev
*pdev
)
7094 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7097 rc
= ata_pci_device_do_resume(pdev
);
7099 ata_host_resume(host
);
7102 #endif /* CONFIG_PM */
7104 #endif /* CONFIG_PCI */
7107 static int __init
ata_init(void)
7109 ata_probe_timeout
*= HZ
;
7110 ata_wq
= create_workqueue("ata");
7114 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7116 destroy_workqueue(ata_wq
);
7120 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7124 static void __exit
ata_exit(void)
7126 destroy_workqueue(ata_wq
);
7127 destroy_workqueue(ata_aux_wq
);
7130 subsys_initcall(ata_init
);
7131 module_exit(ata_exit
);
7133 static unsigned long ratelimit_time
;
7134 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7136 int ata_ratelimit(void)
7139 unsigned long flags
;
7141 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7143 if (time_after(jiffies
, ratelimit_time
)) {
7145 ratelimit_time
= jiffies
+ (HZ
/5);
7149 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7155 * ata_wait_register - wait until register value changes
7156 * @reg: IO-mapped register
7157 * @mask: Mask to apply to read register value
7158 * @val: Wait condition
7159 * @interval_msec: polling interval in milliseconds
7160 * @timeout_msec: timeout in milliseconds
7162 * Waiting for some bits of register to change is a common
7163 * operation for ATA controllers. This function reads 32bit LE
7164 * IO-mapped register @reg and tests for the following condition.
7166 * (*@reg & mask) != val
7168 * If the condition is met, it returns; otherwise, the process is
7169 * repeated after @interval_msec until timeout.
7172 * Kernel thread context (may sleep)
7175 * The final register value.
7177 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7178 unsigned long interval_msec
,
7179 unsigned long timeout_msec
)
7181 unsigned long timeout
;
7184 tmp
= ioread32(reg
);
7186 /* Calculate timeout _after_ the first read to make sure
7187 * preceding writes reach the controller before starting to
7188 * eat away the timeout.
7190 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7192 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7193 msleep(interval_msec
);
7194 tmp
= ioread32(reg
);
7203 static void ata_dummy_noret(struct ata_port
*ap
) { }
7204 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7205 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7207 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7212 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7214 return AC_ERR_SYSTEM
;
7217 const struct ata_port_operations ata_dummy_port_ops
= {
7218 .check_status
= ata_dummy_check_status
,
7219 .check_altstatus
= ata_dummy_check_status
,
7220 .dev_select
= ata_noop_dev_select
,
7221 .qc_prep
= ata_noop_qc_prep
,
7222 .qc_issue
= ata_dummy_qc_issue
,
7223 .freeze
= ata_dummy_noret
,
7224 .thaw
= ata_dummy_noret
,
7225 .error_handler
= ata_dummy_noret
,
7226 .post_internal_cmd
= ata_dummy_qc_noret
,
7227 .irq_clear
= ata_dummy_noret
,
7228 .port_start
= ata_dummy_ret0
,
7229 .port_stop
= ata_dummy_noret
,
7232 const struct ata_port_info ata_dummy_port_info
= {
7233 .port_ops
= &ata_dummy_port_ops
,
7237 * libata is essentially a library of internal helper functions for
7238 * low-level ATA host controller drivers. As such, the API/ABI is
7239 * likely to change as new drivers are added and updated.
7240 * Do not depend on ABI/API stability.
7243 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7244 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7245 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7246 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7247 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7248 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7249 EXPORT_SYMBOL_GPL(ata_std_ports
);
7250 EXPORT_SYMBOL_GPL(ata_host_init
);
7251 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7252 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7253 EXPORT_SYMBOL_GPL(ata_host_start
);
7254 EXPORT_SYMBOL_GPL(ata_host_register
);
7255 EXPORT_SYMBOL_GPL(ata_host_activate
);
7256 EXPORT_SYMBOL_GPL(ata_host_detach
);
7257 EXPORT_SYMBOL_GPL(ata_sg_init
);
7258 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7259 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7260 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7261 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7262 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7263 EXPORT_SYMBOL_GPL(ata_tf_load
);
7264 EXPORT_SYMBOL_GPL(ata_tf_read
);
7265 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7266 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7267 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7268 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7269 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7270 EXPORT_SYMBOL_GPL(ata_check_status
);
7271 EXPORT_SYMBOL_GPL(ata_altstatus
);
7272 EXPORT_SYMBOL_GPL(ata_exec_command
);
7273 EXPORT_SYMBOL_GPL(ata_port_start
);
7274 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7275 EXPORT_SYMBOL_GPL(ata_interrupt
);
7276 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7277 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7278 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7279 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7280 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7281 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7282 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7283 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7284 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7285 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7286 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7287 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7288 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7289 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7290 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7291 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7292 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7293 EXPORT_SYMBOL_GPL(ata_port_probe
);
7294 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7295 EXPORT_SYMBOL_GPL(sata_set_spd
);
7296 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7297 EXPORT_SYMBOL_GPL(sata_link_resume
);
7298 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7299 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7300 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7301 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7302 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7303 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7304 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7305 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7306 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7307 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7308 EXPORT_SYMBOL_GPL(ata_port_disable
);
7309 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7310 EXPORT_SYMBOL_GPL(ata_wait_register
);
7311 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7312 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7313 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7314 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7315 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7316 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7317 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7318 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7319 EXPORT_SYMBOL_GPL(ata_host_intr
);
7320 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7321 EXPORT_SYMBOL_GPL(sata_scr_read
);
7322 EXPORT_SYMBOL_GPL(sata_scr_write
);
7323 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7324 EXPORT_SYMBOL_GPL(ata_link_online
);
7325 EXPORT_SYMBOL_GPL(ata_link_offline
);
7327 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7328 EXPORT_SYMBOL_GPL(ata_host_resume
);
7329 #endif /* CONFIG_PM */
7330 EXPORT_SYMBOL_GPL(ata_id_string
);
7331 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7332 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7333 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7335 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7336 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7337 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7340 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7341 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7342 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7343 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7344 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7345 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7347 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7348 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7349 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7350 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7351 #endif /* CONFIG_PM */
7352 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7353 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7354 #endif /* CONFIG_PCI */
7356 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7357 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7358 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7359 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7360 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7362 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7363 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7364 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7365 EXPORT_SYMBOL_GPL(ata_port_desc
);
7367 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7368 #endif /* CONFIG_PCI */
7369 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7370 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7371 EXPORT_SYMBOL_GPL(ata_link_abort
);
7372 EXPORT_SYMBOL_GPL(ata_port_abort
);
7373 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7374 EXPORT_SYMBOL_GPL(sata_async_notification
);
7375 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7376 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7377 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7378 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7379 EXPORT_SYMBOL_GPL(ata_do_eh
);
7380 EXPORT_SYMBOL_GPL(ata_irq_on
);
7381 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7383 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7384 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7385 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7386 EXPORT_SYMBOL_GPL(ata_cable_sata
);