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
*sgl
,
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;
1475 struct scatterlist
*sg
;
1477 for_each_sg(sgl
, sg
, n_elem
, i
)
1478 buflen
+= sg
->length
;
1480 ata_sg_init(qc
, sgl
, n_elem
);
1481 qc
->nbytes
= buflen
;
1484 qc
->private_data
= &wait
;
1485 qc
->complete_fn
= ata_qc_complete_internal
;
1489 spin_unlock_irqrestore(ap
->lock
, flags
);
1492 timeout
= ata_probe_timeout
* 1000 / HZ
;
1494 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1496 ata_port_flush_task(ap
);
1499 spin_lock_irqsave(ap
->lock
, flags
);
1501 /* We're racing with irq here. If we lose, the
1502 * following test prevents us from completing the qc
1503 * twice. If we win, the port is frozen and will be
1504 * cleaned up by ->post_internal_cmd().
1506 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1507 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1509 if (ap
->ops
->error_handler
)
1510 ata_port_freeze(ap
);
1512 ata_qc_complete(qc
);
1514 if (ata_msg_warn(ap
))
1515 ata_dev_printk(dev
, KERN_WARNING
,
1516 "qc timeout (cmd 0x%x)\n", command
);
1519 spin_unlock_irqrestore(ap
->lock
, flags
);
1522 /* do post_internal_cmd */
1523 if (ap
->ops
->post_internal_cmd
)
1524 ap
->ops
->post_internal_cmd(qc
);
1526 /* perform minimal error analysis */
1527 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1528 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1529 qc
->err_mask
|= AC_ERR_DEV
;
1532 qc
->err_mask
|= AC_ERR_OTHER
;
1534 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1535 qc
->err_mask
&= ~AC_ERR_OTHER
;
1539 spin_lock_irqsave(ap
->lock
, flags
);
1541 *tf
= qc
->result_tf
;
1542 err_mask
= qc
->err_mask
;
1545 link
->active_tag
= preempted_tag
;
1546 link
->sactive
= preempted_sactive
;
1547 ap
->qc_active
= preempted_qc_active
;
1548 ap
->nr_active_links
= preempted_nr_active_links
;
1550 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1551 * Until those drivers are fixed, we detect the condition
1552 * here, fail the command with AC_ERR_SYSTEM and reenable the
1555 * Note that this doesn't change any behavior as internal
1556 * command failure results in disabling the device in the
1557 * higher layer for LLDDs without new reset/EH callbacks.
1559 * Kill the following code as soon as those drivers are fixed.
1561 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1562 err_mask
|= AC_ERR_SYSTEM
;
1566 spin_unlock_irqrestore(ap
->lock
, flags
);
1572 * ata_exec_internal - execute libata internal command
1573 * @dev: Device to which the command is sent
1574 * @tf: Taskfile registers for the command and the result
1575 * @cdb: CDB for packet command
1576 * @dma_dir: Data tranfer direction of the command
1577 * @buf: Data buffer of the command
1578 * @buflen: Length of data buffer
1579 * @timeout: Timeout in msecs (0 for default)
1581 * Wrapper around ata_exec_internal_sg() which takes simple
1582 * buffer instead of sg list.
1585 * None. Should be called with kernel context, might sleep.
1588 * Zero on success, AC_ERR_* mask on failure
1590 unsigned ata_exec_internal(struct ata_device
*dev
,
1591 struct ata_taskfile
*tf
, const u8
*cdb
,
1592 int dma_dir
, void *buf
, unsigned int buflen
,
1593 unsigned long timeout
)
1595 struct scatterlist
*psg
= NULL
, sg
;
1596 unsigned int n_elem
= 0;
1598 if (dma_dir
!= DMA_NONE
) {
1600 sg_init_one(&sg
, buf
, buflen
);
1605 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1610 * ata_do_simple_cmd - execute simple internal command
1611 * @dev: Device to which the command is sent
1612 * @cmd: Opcode to execute
1614 * Execute a 'simple' command, that only consists of the opcode
1615 * 'cmd' itself, without filling any other registers
1618 * Kernel thread context (may sleep).
1621 * Zero on success, AC_ERR_* mask on failure
1623 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1625 struct ata_taskfile tf
;
1627 ata_tf_init(dev
, &tf
);
1630 tf
.flags
|= ATA_TFLAG_DEVICE
;
1631 tf
.protocol
= ATA_PROT_NODATA
;
1633 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1637 * ata_pio_need_iordy - check if iordy needed
1640 * Check if the current speed of the device requires IORDY. Used
1641 * by various controllers for chip configuration.
1644 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1646 /* Controller doesn't support IORDY. Probably a pointless check
1647 as the caller should know this */
1648 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1650 /* PIO3 and higher it is mandatory */
1651 if (adev
->pio_mode
> XFER_PIO_2
)
1653 /* We turn it on when possible */
1654 if (ata_id_has_iordy(adev
->id
))
1660 * ata_pio_mask_no_iordy - Return the non IORDY mask
1663 * Compute the highest mode possible if we are not using iordy. Return
1664 * -1 if no iordy mode is available.
1667 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1669 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1670 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1671 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1672 /* Is the speed faster than the drive allows non IORDY ? */
1674 /* This is cycle times not frequency - watch the logic! */
1675 if (pio
> 240) /* PIO2 is 240nS per cycle */
1676 return 3 << ATA_SHIFT_PIO
;
1677 return 7 << ATA_SHIFT_PIO
;
1680 return 3 << ATA_SHIFT_PIO
;
1684 * ata_dev_read_id - Read ID data from the specified device
1685 * @dev: target device
1686 * @p_class: pointer to class of the target device (may be changed)
1687 * @flags: ATA_READID_* flags
1688 * @id: buffer to read IDENTIFY data into
1690 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1691 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1692 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1693 * for pre-ATA4 drives.
1695 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1696 * now we abort if we hit that case.
1699 * Kernel thread context (may sleep)
1702 * 0 on success, -errno otherwise.
1704 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1705 unsigned int flags
, u16
*id
)
1707 struct ata_port
*ap
= dev
->link
->ap
;
1708 unsigned int class = *p_class
;
1709 struct ata_taskfile tf
;
1710 unsigned int err_mask
= 0;
1712 int may_fallback
= 1, tried_spinup
= 0;
1715 if (ata_msg_ctl(ap
))
1716 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1718 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1720 ata_tf_init(dev
, &tf
);
1724 tf
.command
= ATA_CMD_ID_ATA
;
1727 tf
.command
= ATA_CMD_ID_ATAPI
;
1731 reason
= "unsupported class";
1735 tf
.protocol
= ATA_PROT_PIO
;
1737 /* Some devices choke if TF registers contain garbage. Make
1738 * sure those are properly initialized.
1740 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1742 /* Device presence detection is unreliable on some
1743 * controllers. Always poll IDENTIFY if available.
1745 tf
.flags
|= ATA_TFLAG_POLLING
;
1747 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1748 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1750 if (err_mask
& AC_ERR_NODEV_HINT
) {
1751 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1752 ap
->print_id
, dev
->devno
);
1756 /* Device or controller might have reported the wrong
1757 * device class. Give a shot at the other IDENTIFY if
1758 * the current one is aborted by the device.
1761 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1764 if (class == ATA_DEV_ATA
)
1765 class = ATA_DEV_ATAPI
;
1767 class = ATA_DEV_ATA
;
1772 reason
= "I/O error";
1776 /* Falling back doesn't make sense if ID data was read
1777 * successfully at least once.
1781 swap_buf_le16(id
, ATA_ID_WORDS
);
1785 reason
= "device reports invalid type";
1787 if (class == ATA_DEV_ATA
) {
1788 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1791 if (ata_id_is_ata(id
))
1795 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1798 * Drive powered-up in standby mode, and requires a specific
1799 * SET_FEATURES spin-up subcommand before it will accept
1800 * anything other than the original IDENTIFY command.
1802 ata_tf_init(dev
, &tf
);
1803 tf
.command
= ATA_CMD_SET_FEATURES
;
1804 tf
.feature
= SETFEATURES_SPINUP
;
1805 tf
.protocol
= ATA_PROT_NODATA
;
1806 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1807 err_mask
= ata_exec_internal(dev
, &tf
, NULL
,
1808 DMA_NONE
, NULL
, 0, 0);
1809 if (err_mask
&& id
[2] != 0x738c) {
1811 reason
= "SPINUP failed";
1815 * If the drive initially returned incomplete IDENTIFY info,
1816 * we now must reissue the IDENTIFY command.
1818 if (id
[2] == 0x37c8)
1822 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1824 * The exact sequence expected by certain pre-ATA4 drives is:
1826 * IDENTIFY (optional in early ATA)
1827 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1829 * Some drives were very specific about that exact sequence.
1831 * Note that ATA4 says lba is mandatory so the second check
1832 * shoud never trigger.
1834 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1835 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1838 reason
= "INIT_DEV_PARAMS failed";
1842 /* current CHS translation info (id[53-58]) might be
1843 * changed. reread the identify device info.
1845 flags
&= ~ATA_READID_POSTRESET
;
1855 if (ata_msg_warn(ap
))
1856 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1857 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1861 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1863 struct ata_port
*ap
= dev
->link
->ap
;
1864 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1867 static void ata_dev_config_ncq(struct ata_device
*dev
,
1868 char *desc
, size_t desc_sz
)
1870 struct ata_port
*ap
= dev
->link
->ap
;
1871 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1873 if (!ata_id_has_ncq(dev
->id
)) {
1877 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1878 snprintf(desc
, desc_sz
, "NCQ (not used)");
1881 if (ap
->flags
& ATA_FLAG_NCQ
) {
1882 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1883 dev
->flags
|= ATA_DFLAG_NCQ
;
1886 if (hdepth
>= ddepth
)
1887 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1889 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1893 * ata_dev_configure - Configure the specified ATA/ATAPI device
1894 * @dev: Target device to configure
1896 * Configure @dev according to @dev->id. Generic and low-level
1897 * driver specific fixups are also applied.
1900 * Kernel thread context (may sleep)
1903 * 0 on success, -errno otherwise
1905 int ata_dev_configure(struct ata_device
*dev
)
1907 struct ata_port
*ap
= dev
->link
->ap
;
1908 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1909 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1910 const u16
*id
= dev
->id
;
1911 unsigned int xfer_mask
;
1912 char revbuf
[7]; /* XYZ-99\0 */
1913 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1914 char modelbuf
[ATA_ID_PROD_LEN
+1];
1917 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1918 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1923 if (ata_msg_probe(ap
))
1924 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1927 dev
->horkage
|= ata_dev_blacklisted(dev
);
1929 /* let ACPI work its magic */
1930 rc
= ata_acpi_on_devcfg(dev
);
1934 /* massage HPA, do it early as it might change IDENTIFY data */
1935 rc
= ata_hpa_resize(dev
);
1939 /* print device capabilities */
1940 if (ata_msg_probe(ap
))
1941 ata_dev_printk(dev
, KERN_DEBUG
,
1942 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1943 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1945 id
[49], id
[82], id
[83], id
[84],
1946 id
[85], id
[86], id
[87], id
[88]);
1948 /* initialize to-be-configured parameters */
1949 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1950 dev
->max_sectors
= 0;
1958 * common ATA, ATAPI feature tests
1961 /* find max transfer mode; for printk only */
1962 xfer_mask
= ata_id_xfermask(id
);
1964 if (ata_msg_probe(ap
))
1967 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1968 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1971 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1974 /* ATA-specific feature tests */
1975 if (dev
->class == ATA_DEV_ATA
) {
1976 if (ata_id_is_cfa(id
)) {
1977 if (id
[162] & 1) /* CPRM may make this media unusable */
1978 ata_dev_printk(dev
, KERN_WARNING
,
1979 "supports DRM functions and may "
1980 "not be fully accessable.\n");
1981 snprintf(revbuf
, 7, "CFA");
1984 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1986 dev
->n_sectors
= ata_id_n_sectors(id
);
1988 if (dev
->id
[59] & 0x100)
1989 dev
->multi_count
= dev
->id
[59] & 0xff;
1991 if (ata_id_has_lba(id
)) {
1992 const char *lba_desc
;
1996 dev
->flags
|= ATA_DFLAG_LBA
;
1997 if (ata_id_has_lba48(id
)) {
1998 dev
->flags
|= ATA_DFLAG_LBA48
;
2001 if (dev
->n_sectors
>= (1UL << 28) &&
2002 ata_id_has_flush_ext(id
))
2003 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2007 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2009 /* print device info to dmesg */
2010 if (ata_msg_drv(ap
) && print_info
) {
2011 ata_dev_printk(dev
, KERN_INFO
,
2012 "%s: %s, %s, max %s\n",
2013 revbuf
, modelbuf
, fwrevbuf
,
2014 ata_mode_string(xfer_mask
));
2015 ata_dev_printk(dev
, KERN_INFO
,
2016 "%Lu sectors, multi %u: %s %s\n",
2017 (unsigned long long)dev
->n_sectors
,
2018 dev
->multi_count
, lba_desc
, ncq_desc
);
2023 /* Default translation */
2024 dev
->cylinders
= id
[1];
2026 dev
->sectors
= id
[6];
2028 if (ata_id_current_chs_valid(id
)) {
2029 /* Current CHS translation is valid. */
2030 dev
->cylinders
= id
[54];
2031 dev
->heads
= id
[55];
2032 dev
->sectors
= id
[56];
2035 /* print device info to dmesg */
2036 if (ata_msg_drv(ap
) && print_info
) {
2037 ata_dev_printk(dev
, KERN_INFO
,
2038 "%s: %s, %s, max %s\n",
2039 revbuf
, modelbuf
, fwrevbuf
,
2040 ata_mode_string(xfer_mask
));
2041 ata_dev_printk(dev
, KERN_INFO
,
2042 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2043 (unsigned long long)dev
->n_sectors
,
2044 dev
->multi_count
, dev
->cylinders
,
2045 dev
->heads
, dev
->sectors
);
2052 /* ATAPI-specific feature tests */
2053 else if (dev
->class == ATA_DEV_ATAPI
) {
2054 const char *cdb_intr_string
= "";
2055 const char *atapi_an_string
= "";
2058 rc
= atapi_cdb_len(id
);
2059 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2060 if (ata_msg_warn(ap
))
2061 ata_dev_printk(dev
, KERN_WARNING
,
2062 "unsupported CDB len\n");
2066 dev
->cdb_len
= (unsigned int) rc
;
2068 /* Enable ATAPI AN if both the host and device have
2069 * the support. If PMP is attached, SNTF is required
2070 * to enable ATAPI AN to discern between PHY status
2071 * changed notifications and ATAPI ANs.
2073 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2074 (!ap
->nr_pmp_links
||
2075 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2076 unsigned int err_mask
;
2078 /* issue SET feature command to turn this on */
2079 err_mask
= ata_dev_set_AN(dev
, SETFEATURES_SATA_ENABLE
);
2081 ata_dev_printk(dev
, KERN_ERR
,
2082 "failed to enable ATAPI AN "
2083 "(err_mask=0x%x)\n", err_mask
);
2085 dev
->flags
|= ATA_DFLAG_AN
;
2086 atapi_an_string
= ", ATAPI AN";
2090 if (ata_id_cdb_intr(dev
->id
)) {
2091 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2092 cdb_intr_string
= ", CDB intr";
2095 /* print device info to dmesg */
2096 if (ata_msg_drv(ap
) && print_info
)
2097 ata_dev_printk(dev
, KERN_INFO
,
2098 "ATAPI: %s, %s, max %s%s%s\n",
2100 ata_mode_string(xfer_mask
),
2101 cdb_intr_string
, atapi_an_string
);
2104 /* determine max_sectors */
2105 dev
->max_sectors
= ATA_MAX_SECTORS
;
2106 if (dev
->flags
& ATA_DFLAG_LBA48
)
2107 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2109 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2110 /* Let the user know. We don't want to disallow opens for
2111 rescue purposes, or in case the vendor is just a blithering
2114 ata_dev_printk(dev
, KERN_WARNING
,
2115 "Drive reports diagnostics failure. This may indicate a drive\n");
2116 ata_dev_printk(dev
, KERN_WARNING
,
2117 "fault or invalid emulation. Contact drive vendor for information.\n");
2121 /* limit bridge transfers to udma5, 200 sectors */
2122 if (ata_dev_knobble(dev
)) {
2123 if (ata_msg_drv(ap
) && print_info
)
2124 ata_dev_printk(dev
, KERN_INFO
,
2125 "applying bridge limits\n");
2126 dev
->udma_mask
&= ATA_UDMA5
;
2127 dev
->max_sectors
= ATA_MAX_SECTORS
;
2130 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2131 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2134 if (ap
->ops
->dev_config
)
2135 ap
->ops
->dev_config(dev
);
2137 if (ata_msg_probe(ap
))
2138 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2139 __FUNCTION__
, ata_chk_status(ap
));
2143 if (ata_msg_probe(ap
))
2144 ata_dev_printk(dev
, KERN_DEBUG
,
2145 "%s: EXIT, err\n", __FUNCTION__
);
2150 * ata_cable_40wire - return 40 wire cable type
2153 * Helper method for drivers which want to hardwire 40 wire cable
2157 int ata_cable_40wire(struct ata_port
*ap
)
2159 return ATA_CBL_PATA40
;
2163 * ata_cable_80wire - return 80 wire cable type
2166 * Helper method for drivers which want to hardwire 80 wire cable
2170 int ata_cable_80wire(struct ata_port
*ap
)
2172 return ATA_CBL_PATA80
;
2176 * ata_cable_unknown - return unknown PATA cable.
2179 * Helper method for drivers which have no PATA cable detection.
2182 int ata_cable_unknown(struct ata_port
*ap
)
2184 return ATA_CBL_PATA_UNK
;
2188 * ata_cable_sata - return SATA cable type
2191 * Helper method for drivers which have SATA cables
2194 int ata_cable_sata(struct ata_port
*ap
)
2196 return ATA_CBL_SATA
;
2200 * ata_bus_probe - Reset and probe ATA bus
2203 * Master ATA bus probing function. Initiates a hardware-dependent
2204 * bus reset, then attempts to identify any devices found on
2208 * PCI/etc. bus probe sem.
2211 * Zero on success, negative errno otherwise.
2214 int ata_bus_probe(struct ata_port
*ap
)
2216 unsigned int classes
[ATA_MAX_DEVICES
];
2217 int tries
[ATA_MAX_DEVICES
];
2219 struct ata_device
*dev
;
2223 ata_link_for_each_dev(dev
, &ap
->link
)
2224 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2227 /* reset and determine device classes */
2228 ap
->ops
->phy_reset(ap
);
2230 ata_link_for_each_dev(dev
, &ap
->link
) {
2231 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2232 dev
->class != ATA_DEV_UNKNOWN
)
2233 classes
[dev
->devno
] = dev
->class;
2235 classes
[dev
->devno
] = ATA_DEV_NONE
;
2237 dev
->class = ATA_DEV_UNKNOWN
;
2242 /* after the reset the device state is PIO 0 and the controller
2243 state is undefined. Record the mode */
2245 ata_link_for_each_dev(dev
, &ap
->link
)
2246 dev
->pio_mode
= XFER_PIO_0
;
2248 /* read IDENTIFY page and configure devices. We have to do the identify
2249 specific sequence bass-ackwards so that PDIAG- is released by
2252 ata_link_for_each_dev(dev
, &ap
->link
) {
2253 if (tries
[dev
->devno
])
2254 dev
->class = classes
[dev
->devno
];
2256 if (!ata_dev_enabled(dev
))
2259 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2265 /* Now ask for the cable type as PDIAG- should have been released */
2266 if (ap
->ops
->cable_detect
)
2267 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2269 /* We may have SATA bridge glue hiding here irrespective of the
2270 reported cable types and sensed types */
2271 ata_link_for_each_dev(dev
, &ap
->link
) {
2272 if (!ata_dev_enabled(dev
))
2274 /* SATA drives indicate we have a bridge. We don't know which
2275 end of the link the bridge is which is a problem */
2276 if (ata_id_is_sata(dev
->id
))
2277 ap
->cbl
= ATA_CBL_SATA
;
2280 /* After the identify sequence we can now set up the devices. We do
2281 this in the normal order so that the user doesn't get confused */
2283 ata_link_for_each_dev(dev
, &ap
->link
) {
2284 if (!ata_dev_enabled(dev
))
2287 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2288 rc
= ata_dev_configure(dev
);
2289 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2294 /* configure transfer mode */
2295 rc
= ata_set_mode(&ap
->link
, &dev
);
2299 ata_link_for_each_dev(dev
, &ap
->link
)
2300 if (ata_dev_enabled(dev
))
2303 /* no device present, disable port */
2304 ata_port_disable(ap
);
2308 tries
[dev
->devno
]--;
2312 /* eeek, something went very wrong, give up */
2313 tries
[dev
->devno
] = 0;
2317 /* give it just one more chance */
2318 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2320 if (tries
[dev
->devno
] == 1) {
2321 /* This is the last chance, better to slow
2322 * down than lose it.
2324 sata_down_spd_limit(&ap
->link
);
2325 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2329 if (!tries
[dev
->devno
])
2330 ata_dev_disable(dev
);
2336 * ata_port_probe - Mark port as enabled
2337 * @ap: Port for which we indicate enablement
2339 * Modify @ap data structure such that the system
2340 * thinks that the entire port is enabled.
2342 * LOCKING: host lock, or some other form of
2346 void ata_port_probe(struct ata_port
*ap
)
2348 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2352 * sata_print_link_status - Print SATA link status
2353 * @link: SATA link to printk link status about
2355 * This function prints link speed and status of a SATA link.
2360 void sata_print_link_status(struct ata_link
*link
)
2362 u32 sstatus
, scontrol
, tmp
;
2364 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2366 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2368 if (ata_link_online(link
)) {
2369 tmp
= (sstatus
>> 4) & 0xf;
2370 ata_link_printk(link
, KERN_INFO
,
2371 "SATA link up %s (SStatus %X SControl %X)\n",
2372 sata_spd_string(tmp
), sstatus
, scontrol
);
2374 ata_link_printk(link
, KERN_INFO
,
2375 "SATA link down (SStatus %X SControl %X)\n",
2381 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2382 * @ap: SATA port associated with target SATA PHY.
2384 * This function issues commands to standard SATA Sxxx
2385 * PHY registers, to wake up the phy (and device), and
2386 * clear any reset condition.
2389 * PCI/etc. bus probe sem.
2392 void __sata_phy_reset(struct ata_port
*ap
)
2394 struct ata_link
*link
= &ap
->link
;
2395 unsigned long timeout
= jiffies
+ (HZ
* 5);
2398 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2399 /* issue phy wake/reset */
2400 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2401 /* Couldn't find anything in SATA I/II specs, but
2402 * AHCI-1.1 10.4.2 says at least 1 ms. */
2405 /* phy wake/clear reset */
2406 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2408 /* wait for phy to become ready, if necessary */
2411 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2412 if ((sstatus
& 0xf) != 1)
2414 } while (time_before(jiffies
, timeout
));
2416 /* print link status */
2417 sata_print_link_status(link
);
2419 /* TODO: phy layer with polling, timeouts, etc. */
2420 if (!ata_link_offline(link
))
2423 ata_port_disable(ap
);
2425 if (ap
->flags
& ATA_FLAG_DISABLED
)
2428 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2429 ata_port_disable(ap
);
2433 ap
->cbl
= ATA_CBL_SATA
;
2437 * sata_phy_reset - Reset SATA bus.
2438 * @ap: SATA port associated with target SATA PHY.
2440 * This function resets the SATA bus, and then probes
2441 * the bus for devices.
2444 * PCI/etc. bus probe sem.
2447 void sata_phy_reset(struct ata_port
*ap
)
2449 __sata_phy_reset(ap
);
2450 if (ap
->flags
& ATA_FLAG_DISABLED
)
2456 * ata_dev_pair - return other device on cable
2459 * Obtain the other device on the same cable, or if none is
2460 * present NULL is returned
2463 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2465 struct ata_link
*link
= adev
->link
;
2466 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2467 if (!ata_dev_enabled(pair
))
2473 * ata_port_disable - Disable port.
2474 * @ap: Port to be disabled.
2476 * Modify @ap data structure such that the system
2477 * thinks that the entire port is disabled, and should
2478 * never attempt to probe or communicate with devices
2481 * LOCKING: host lock, or some other form of
2485 void ata_port_disable(struct ata_port
*ap
)
2487 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2488 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2489 ap
->flags
|= ATA_FLAG_DISABLED
;
2493 * sata_down_spd_limit - adjust SATA spd limit downward
2494 * @link: Link to adjust SATA spd limit for
2496 * Adjust SATA spd limit of @link downward. Note that this
2497 * function only adjusts the limit. The change must be applied
2498 * using sata_set_spd().
2501 * Inherited from caller.
2504 * 0 on success, negative errno on failure
2506 int sata_down_spd_limit(struct ata_link
*link
)
2508 u32 sstatus
, spd
, mask
;
2511 if (!sata_scr_valid(link
))
2514 /* If SCR can be read, use it to determine the current SPD.
2515 * If not, use cached value in link->sata_spd.
2517 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2519 spd
= (sstatus
>> 4) & 0xf;
2521 spd
= link
->sata_spd
;
2523 mask
= link
->sata_spd_limit
;
2527 /* unconditionally mask off the highest bit */
2528 highbit
= fls(mask
) - 1;
2529 mask
&= ~(1 << highbit
);
2531 /* Mask off all speeds higher than or equal to the current
2532 * one. Force 1.5Gbps if current SPD is not available.
2535 mask
&= (1 << (spd
- 1)) - 1;
2539 /* were we already at the bottom? */
2543 link
->sata_spd_limit
= mask
;
2545 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2546 sata_spd_string(fls(mask
)));
2551 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2555 if (link
->sata_spd_limit
== UINT_MAX
)
2558 limit
= fls(link
->sata_spd_limit
);
2560 spd
= (*scontrol
>> 4) & 0xf;
2561 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2563 return spd
!= limit
;
2567 * sata_set_spd_needed - is SATA spd configuration needed
2568 * @link: Link in question
2570 * Test whether the spd limit in SControl matches
2571 * @link->sata_spd_limit. This function is used to determine
2572 * whether hardreset is necessary to apply SATA spd
2576 * Inherited from caller.
2579 * 1 if SATA spd configuration is needed, 0 otherwise.
2581 int sata_set_spd_needed(struct ata_link
*link
)
2585 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2588 return __sata_set_spd_needed(link
, &scontrol
);
2592 * sata_set_spd - set SATA spd according to spd limit
2593 * @link: Link to set SATA spd for
2595 * Set SATA spd of @link according to sata_spd_limit.
2598 * Inherited from caller.
2601 * 0 if spd doesn't need to be changed, 1 if spd has been
2602 * changed. Negative errno if SCR registers are inaccessible.
2604 int sata_set_spd(struct ata_link
*link
)
2609 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2612 if (!__sata_set_spd_needed(link
, &scontrol
))
2615 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2622 * This mode timing computation functionality is ported over from
2623 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2626 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2627 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2628 * for UDMA6, which is currently supported only by Maxtor drives.
2630 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2633 static const struct ata_timing ata_timing
[] = {
2635 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2636 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2637 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2638 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2640 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2641 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2642 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2643 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2644 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2646 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2648 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2649 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2650 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2652 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2653 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2654 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2656 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2657 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2658 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2659 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2661 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2662 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2663 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2665 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2670 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2671 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2673 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2675 q
->setup
= EZ(t
->setup
* 1000, T
);
2676 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2677 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2678 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2679 q
->active
= EZ(t
->active
* 1000, T
);
2680 q
->recover
= EZ(t
->recover
* 1000, T
);
2681 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2682 q
->udma
= EZ(t
->udma
* 1000, UT
);
2685 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2686 struct ata_timing
*m
, unsigned int what
)
2688 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2689 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2690 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2691 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2692 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2693 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2694 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2695 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2698 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2700 const struct ata_timing
*t
;
2702 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2703 if (t
->mode
== 0xFF)
2708 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2709 struct ata_timing
*t
, int T
, int UT
)
2711 const struct ata_timing
*s
;
2712 struct ata_timing p
;
2718 if (!(s
= ata_timing_find_mode(speed
)))
2721 memcpy(t
, s
, sizeof(*s
));
2724 * If the drive is an EIDE drive, it can tell us it needs extended
2725 * PIO/MW_DMA cycle timing.
2728 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2729 memset(&p
, 0, sizeof(p
));
2730 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2731 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2732 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2733 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2734 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2736 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2740 * Convert the timing to bus clock counts.
2743 ata_timing_quantize(t
, t
, T
, UT
);
2746 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2747 * S.M.A.R.T * and some other commands. We have to ensure that the
2748 * DMA cycle timing is slower/equal than the fastest PIO timing.
2751 if (speed
> XFER_PIO_6
) {
2752 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2753 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2757 * Lengthen active & recovery time so that cycle time is correct.
2760 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2761 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2762 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2765 if (t
->active
+ t
->recover
< t
->cycle
) {
2766 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2767 t
->recover
= t
->cycle
- t
->active
;
2770 /* In a few cases quantisation may produce enough errors to
2771 leave t->cycle too low for the sum of active and recovery
2772 if so we must correct this */
2773 if (t
->active
+ t
->recover
> t
->cycle
)
2774 t
->cycle
= t
->active
+ t
->recover
;
2780 * ata_down_xfermask_limit - adjust dev xfer masks downward
2781 * @dev: Device to adjust xfer masks
2782 * @sel: ATA_DNXFER_* selector
2784 * Adjust xfer masks of @dev downward. Note that this function
2785 * does not apply the change. Invoking ata_set_mode() afterwards
2786 * will apply the limit.
2789 * Inherited from caller.
2792 * 0 on success, negative errno on failure
2794 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2797 unsigned int orig_mask
, xfer_mask
;
2798 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2801 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2802 sel
&= ~ATA_DNXFER_QUIET
;
2804 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2807 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2810 case ATA_DNXFER_PIO
:
2811 highbit
= fls(pio_mask
) - 1;
2812 pio_mask
&= ~(1 << highbit
);
2815 case ATA_DNXFER_DMA
:
2817 highbit
= fls(udma_mask
) - 1;
2818 udma_mask
&= ~(1 << highbit
);
2821 } else if (mwdma_mask
) {
2822 highbit
= fls(mwdma_mask
) - 1;
2823 mwdma_mask
&= ~(1 << highbit
);
2829 case ATA_DNXFER_40C
:
2830 udma_mask
&= ATA_UDMA_MASK_40C
;
2833 case ATA_DNXFER_FORCE_PIO0
:
2835 case ATA_DNXFER_FORCE_PIO
:
2844 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2846 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2850 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2851 snprintf(buf
, sizeof(buf
), "%s:%s",
2852 ata_mode_string(xfer_mask
),
2853 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2855 snprintf(buf
, sizeof(buf
), "%s",
2856 ata_mode_string(xfer_mask
));
2858 ata_dev_printk(dev
, KERN_WARNING
,
2859 "limiting speed to %s\n", buf
);
2862 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2868 static int ata_dev_set_mode(struct ata_device
*dev
)
2870 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2871 unsigned int err_mask
;
2874 dev
->flags
&= ~ATA_DFLAG_PIO
;
2875 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2876 dev
->flags
|= ATA_DFLAG_PIO
;
2878 err_mask
= ata_dev_set_xfermode(dev
);
2879 /* Old CFA may refuse this command, which is just fine */
2880 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2881 err_mask
&= ~AC_ERR_DEV
;
2882 /* Some very old devices and some bad newer ones fail any kind of
2883 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2884 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2885 dev
->pio_mode
<= XFER_PIO_2
)
2886 err_mask
&= ~AC_ERR_DEV
;
2888 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2889 "(err_mask=0x%x)\n", err_mask
);
2893 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2894 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
2895 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2899 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2900 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2902 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2903 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2908 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2909 * @link: link on which timings will be programmed
2910 * @r_failed_dev: out paramter for failed device
2912 * Standard implementation of the function used to tune and set
2913 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2914 * ata_dev_set_mode() fails, pointer to the failing device is
2915 * returned in @r_failed_dev.
2918 * PCI/etc. bus probe sem.
2921 * 0 on success, negative errno otherwise
2924 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2926 struct ata_port
*ap
= link
->ap
;
2927 struct ata_device
*dev
;
2928 int rc
= 0, used_dma
= 0, found
= 0;
2930 /* step 1: calculate xfer_mask */
2931 ata_link_for_each_dev(dev
, link
) {
2932 unsigned int pio_mask
, dma_mask
;
2933 unsigned int mode_mask
;
2935 if (!ata_dev_enabled(dev
))
2938 mode_mask
= ATA_DMA_MASK_ATA
;
2939 if (dev
->class == ATA_DEV_ATAPI
)
2940 mode_mask
= ATA_DMA_MASK_ATAPI
;
2941 else if (ata_id_is_cfa(dev
->id
))
2942 mode_mask
= ATA_DMA_MASK_CFA
;
2944 ata_dev_xfermask(dev
);
2946 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2947 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2949 if (libata_dma_mask
& mode_mask
)
2950 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2954 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2955 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2964 /* step 2: always set host PIO timings */
2965 ata_link_for_each_dev(dev
, link
) {
2966 if (!ata_dev_enabled(dev
))
2969 if (!dev
->pio_mode
) {
2970 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2975 dev
->xfer_mode
= dev
->pio_mode
;
2976 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2977 if (ap
->ops
->set_piomode
)
2978 ap
->ops
->set_piomode(ap
, dev
);
2981 /* step 3: set host DMA timings */
2982 ata_link_for_each_dev(dev
, link
) {
2983 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2986 dev
->xfer_mode
= dev
->dma_mode
;
2987 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2988 if (ap
->ops
->set_dmamode
)
2989 ap
->ops
->set_dmamode(ap
, dev
);
2992 /* step 4: update devices' xfer mode */
2993 ata_link_for_each_dev(dev
, link
) {
2994 /* don't update suspended devices' xfer mode */
2995 if (!ata_dev_enabled(dev
))
2998 rc
= ata_dev_set_mode(dev
);
3003 /* Record simplex status. If we selected DMA then the other
3004 * host channels are not permitted to do so.
3006 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3007 ap
->host
->simplex_claimed
= ap
;
3011 *r_failed_dev
= dev
;
3016 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3017 * @link: link on which timings will be programmed
3018 * @r_failed_dev: out paramter for failed device
3020 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3021 * ata_set_mode() fails, pointer to the failing device is
3022 * returned in @r_failed_dev.
3025 * PCI/etc. bus probe sem.
3028 * 0 on success, negative errno otherwise
3030 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3032 struct ata_port
*ap
= link
->ap
;
3034 /* has private set_mode? */
3035 if (ap
->ops
->set_mode
)
3036 return ap
->ops
->set_mode(link
, r_failed_dev
);
3037 return ata_do_set_mode(link
, r_failed_dev
);
3041 * ata_tf_to_host - issue ATA taskfile to host controller
3042 * @ap: port to which command is being issued
3043 * @tf: ATA taskfile register set
3045 * Issues ATA taskfile register set to ATA host controller,
3046 * with proper synchronization with interrupt handler and
3050 * spin_lock_irqsave(host lock)
3053 static inline void ata_tf_to_host(struct ata_port
*ap
,
3054 const struct ata_taskfile
*tf
)
3056 ap
->ops
->tf_load(ap
, tf
);
3057 ap
->ops
->exec_command(ap
, tf
);
3061 * ata_busy_sleep - sleep until BSY clears, or timeout
3062 * @ap: port containing status register to be polled
3063 * @tmout_pat: impatience timeout
3064 * @tmout: overall timeout
3066 * Sleep until ATA Status register bit BSY clears,
3067 * or a timeout occurs.
3070 * Kernel thread context (may sleep).
3073 * 0 on success, -errno otherwise.
3075 int ata_busy_sleep(struct ata_port
*ap
,
3076 unsigned long tmout_pat
, unsigned long tmout
)
3078 unsigned long timer_start
, timeout
;
3081 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3082 timer_start
= jiffies
;
3083 timeout
= timer_start
+ tmout_pat
;
3084 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3085 time_before(jiffies
, timeout
)) {
3087 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3090 if (status
!= 0xff && (status
& ATA_BUSY
))
3091 ata_port_printk(ap
, KERN_WARNING
,
3092 "port is slow to respond, please be patient "
3093 "(Status 0x%x)\n", status
);
3095 timeout
= timer_start
+ tmout
;
3096 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3097 time_before(jiffies
, timeout
)) {
3099 status
= ata_chk_status(ap
);
3105 if (status
& ATA_BUSY
) {
3106 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3107 "(%lu secs, Status 0x%x)\n",
3108 tmout
/ HZ
, status
);
3116 * ata_wait_ready - sleep until BSY clears, or timeout
3117 * @ap: port containing status register to be polled
3118 * @deadline: deadline jiffies for the operation
3120 * Sleep until ATA Status register bit BSY clears, or timeout
3124 * Kernel thread context (may sleep).
3127 * 0 on success, -errno otherwise.
3129 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3131 unsigned long start
= jiffies
;
3135 u8 status
= ata_chk_status(ap
);
3136 unsigned long now
= jiffies
;
3138 if (!(status
& ATA_BUSY
))
3140 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3142 if (time_after(now
, deadline
))
3145 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3146 (deadline
- now
> 3 * HZ
)) {
3147 ata_port_printk(ap
, KERN_WARNING
,
3148 "port is slow to respond, please be patient "
3149 "(Status 0x%x)\n", status
);
3157 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3158 unsigned long deadline
)
3160 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3161 unsigned int dev0
= devmask
& (1 << 0);
3162 unsigned int dev1
= devmask
& (1 << 1);
3165 /* if device 0 was found in ata_devchk, wait for its
3169 rc
= ata_wait_ready(ap
, deadline
);
3177 /* if device 1 was found in ata_devchk, wait for register
3178 * access briefly, then wait for BSY to clear.
3183 ap
->ops
->dev_select(ap
, 1);
3185 /* Wait for register access. Some ATAPI devices fail
3186 * to set nsect/lbal after reset, so don't waste too
3187 * much time on it. We're gonna wait for !BSY anyway.
3189 for (i
= 0; i
< 2; i
++) {
3192 nsect
= ioread8(ioaddr
->nsect_addr
);
3193 lbal
= ioread8(ioaddr
->lbal_addr
);
3194 if ((nsect
== 1) && (lbal
== 1))
3196 msleep(50); /* give drive a breather */
3199 rc
= ata_wait_ready(ap
, deadline
);
3207 /* is all this really necessary? */
3208 ap
->ops
->dev_select(ap
, 0);
3210 ap
->ops
->dev_select(ap
, 1);
3212 ap
->ops
->dev_select(ap
, 0);
3217 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3218 unsigned long deadline
)
3220 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3221 struct ata_device
*dev
;
3224 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3226 /* software reset. causes dev0 to be selected */
3227 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3228 udelay(20); /* FIXME: flush */
3229 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3230 udelay(20); /* FIXME: flush */
3231 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3233 /* If we issued an SRST then an ATA drive (not ATAPI)
3234 * may have changed configuration and be in PIO0 timing. If
3235 * we did a hard reset (or are coming from power on) this is
3236 * true for ATA or ATAPI. Until we've set a suitable controller
3237 * mode we should not touch the bus as we may be talking too fast.
3240 ata_link_for_each_dev(dev
, &ap
->link
)
3241 dev
->pio_mode
= XFER_PIO_0
;
3243 /* If the controller has a pio mode setup function then use
3244 it to set the chipset to rights. Don't touch the DMA setup
3245 as that will be dealt with when revalidating */
3246 if (ap
->ops
->set_piomode
) {
3247 ata_link_for_each_dev(dev
, &ap
->link
)
3248 if (devmask
& (1 << i
++))
3249 ap
->ops
->set_piomode(ap
, dev
);
3252 /* spec mandates ">= 2ms" before checking status.
3253 * We wait 150ms, because that was the magic delay used for
3254 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3255 * between when the ATA command register is written, and then
3256 * status is checked. Because waiting for "a while" before
3257 * checking status is fine, post SRST, we perform this magic
3258 * delay here as well.
3260 * Old drivers/ide uses the 2mS rule and then waits for ready
3264 /* Before we perform post reset processing we want to see if
3265 * the bus shows 0xFF because the odd clown forgets the D7
3266 * pulldown resistor.
3268 if (ata_check_status(ap
) == 0xFF)
3271 return ata_bus_post_reset(ap
, devmask
, deadline
);
3275 * ata_bus_reset - reset host port and associated ATA channel
3276 * @ap: port to reset
3278 * This is typically the first time we actually start issuing
3279 * commands to the ATA channel. We wait for BSY to clear, then
3280 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3281 * result. Determine what devices, if any, are on the channel
3282 * by looking at the device 0/1 error register. Look at the signature
3283 * stored in each device's taskfile registers, to determine if
3284 * the device is ATA or ATAPI.
3287 * PCI/etc. bus probe sem.
3288 * Obtains host lock.
3291 * Sets ATA_FLAG_DISABLED if bus reset fails.
3294 void ata_bus_reset(struct ata_port
*ap
)
3296 struct ata_device
*device
= ap
->link
.device
;
3297 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3298 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3300 unsigned int dev0
, dev1
= 0, devmask
= 0;
3303 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3305 /* determine if device 0/1 are present */
3306 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3309 dev0
= ata_devchk(ap
, 0);
3311 dev1
= ata_devchk(ap
, 1);
3315 devmask
|= (1 << 0);
3317 devmask
|= (1 << 1);
3319 /* select device 0 again */
3320 ap
->ops
->dev_select(ap
, 0);
3322 /* issue bus reset */
3323 if (ap
->flags
& ATA_FLAG_SRST
) {
3324 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3325 if (rc
&& rc
!= -ENODEV
)
3330 * determine by signature whether we have ATA or ATAPI devices
3332 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3333 if ((slave_possible
) && (err
!= 0x81))
3334 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3336 /* is double-select really necessary? */
3337 if (device
[1].class != ATA_DEV_NONE
)
3338 ap
->ops
->dev_select(ap
, 1);
3339 if (device
[0].class != ATA_DEV_NONE
)
3340 ap
->ops
->dev_select(ap
, 0);
3342 /* if no devices were detected, disable this port */
3343 if ((device
[0].class == ATA_DEV_NONE
) &&
3344 (device
[1].class == ATA_DEV_NONE
))
3347 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3348 /* set up device control for ATA_FLAG_SATA_RESET */
3349 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3356 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3357 ata_port_disable(ap
);
3363 * sata_link_debounce - debounce SATA phy status
3364 * @link: ATA link to debounce SATA phy status for
3365 * @params: timing parameters { interval, duratinon, timeout } in msec
3366 * @deadline: deadline jiffies for the operation
3368 * Make sure SStatus of @link reaches stable state, determined by
3369 * holding the same value where DET is not 1 for @duration polled
3370 * every @interval, before @timeout. Timeout constraints the
3371 * beginning of the stable state. Because DET gets stuck at 1 on
3372 * some controllers after hot unplugging, this functions waits
3373 * until timeout then returns 0 if DET is stable at 1.
3375 * @timeout is further limited by @deadline. The sooner of the
3379 * Kernel thread context (may sleep)
3382 * 0 on success, -errno on failure.
3384 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3385 unsigned long deadline
)
3387 unsigned long interval_msec
= params
[0];
3388 unsigned long duration
= msecs_to_jiffies(params
[1]);
3389 unsigned long last_jiffies
, t
;
3393 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3394 if (time_before(t
, deadline
))
3397 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3402 last_jiffies
= jiffies
;
3405 msleep(interval_msec
);
3406 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3412 if (cur
== 1 && time_before(jiffies
, deadline
))
3414 if (time_after(jiffies
, last_jiffies
+ duration
))
3419 /* unstable, start over */
3421 last_jiffies
= jiffies
;
3423 /* Check deadline. If debouncing failed, return
3424 * -EPIPE to tell upper layer to lower link speed.
3426 if (time_after(jiffies
, deadline
))
3432 * sata_link_resume - resume SATA link
3433 * @link: ATA link to resume SATA
3434 * @params: timing parameters { interval, duratinon, timeout } in msec
3435 * @deadline: deadline jiffies for the operation
3437 * Resume SATA phy @link and debounce it.
3440 * Kernel thread context (may sleep)
3443 * 0 on success, -errno on failure.
3445 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3446 unsigned long deadline
)
3451 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3454 scontrol
= (scontrol
& 0x0f0) | 0x300;
3456 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3459 /* Some PHYs react badly if SStatus is pounded immediately
3460 * after resuming. Delay 200ms before debouncing.
3464 return sata_link_debounce(link
, params
, deadline
);
3468 * ata_std_prereset - prepare for reset
3469 * @link: ATA link to be reset
3470 * @deadline: deadline jiffies for the operation
3472 * @link is about to be reset. Initialize it. Failure from
3473 * prereset makes libata abort whole reset sequence and give up
3474 * that port, so prereset should be best-effort. It does its
3475 * best to prepare for reset sequence but if things go wrong, it
3476 * should just whine, not fail.
3479 * Kernel thread context (may sleep)
3482 * 0 on success, -errno otherwise.
3484 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3486 struct ata_port
*ap
= link
->ap
;
3487 struct ata_eh_context
*ehc
= &link
->eh_context
;
3488 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3491 /* handle link resume */
3492 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3493 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3494 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3496 /* Some PMPs don't work with only SRST, force hardreset if PMP
3499 if (ap
->flags
& ATA_FLAG_PMP
)
3500 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3502 /* if we're about to do hardreset, nothing more to do */
3503 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3506 /* if SATA, resume link */
3507 if (ap
->flags
& ATA_FLAG_SATA
) {
3508 rc
= sata_link_resume(link
, timing
, deadline
);
3509 /* whine about phy resume failure but proceed */
3510 if (rc
&& rc
!= -EOPNOTSUPP
)
3511 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3512 "link for reset (errno=%d)\n", rc
);
3515 /* Wait for !BSY if the controller can wait for the first D2H
3516 * Reg FIS and we don't know that no device is attached.
3518 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3519 rc
= ata_wait_ready(ap
, deadline
);
3520 if (rc
&& rc
!= -ENODEV
) {
3521 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3522 "(errno=%d), forcing hardreset\n", rc
);
3523 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3531 * ata_std_softreset - reset host port via ATA SRST
3532 * @link: ATA link to reset
3533 * @classes: resulting classes of attached devices
3534 * @deadline: deadline jiffies for the operation
3536 * Reset host port using ATA SRST.
3539 * Kernel thread context (may sleep)
3542 * 0 on success, -errno otherwise.
3544 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3545 unsigned long deadline
)
3547 struct ata_port
*ap
= link
->ap
;
3548 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3549 unsigned int devmask
= 0;
3555 if (ata_link_offline(link
)) {
3556 classes
[0] = ATA_DEV_NONE
;
3560 /* determine if device 0/1 are present */
3561 if (ata_devchk(ap
, 0))
3562 devmask
|= (1 << 0);
3563 if (slave_possible
&& ata_devchk(ap
, 1))
3564 devmask
|= (1 << 1);
3566 /* select device 0 again */
3567 ap
->ops
->dev_select(ap
, 0);
3569 /* issue bus reset */
3570 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3571 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3572 /* if link is occupied, -ENODEV too is an error */
3573 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3574 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3578 /* determine by signature whether we have ATA or ATAPI devices */
3579 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3580 devmask
& (1 << 0), &err
);
3581 if (slave_possible
&& err
!= 0x81)
3582 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3583 devmask
& (1 << 1), &err
);
3586 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3591 * sata_link_hardreset - reset link via SATA phy reset
3592 * @link: link to reset
3593 * @timing: timing parameters { interval, duratinon, timeout } in msec
3594 * @deadline: deadline jiffies for the operation
3596 * SATA phy-reset @link using DET bits of SControl register.
3599 * Kernel thread context (may sleep)
3602 * 0 on success, -errno otherwise.
3604 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3605 unsigned long deadline
)
3612 if (sata_set_spd_needed(link
)) {
3613 /* SATA spec says nothing about how to reconfigure
3614 * spd. To be on the safe side, turn off phy during
3615 * reconfiguration. This works for at least ICH7 AHCI
3618 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3621 scontrol
= (scontrol
& 0x0f0) | 0x304;
3623 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3629 /* issue phy wake/reset */
3630 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3633 scontrol
= (scontrol
& 0x0f0) | 0x301;
3635 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3638 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3639 * 10.4.2 says at least 1 ms.
3643 /* bring link back */
3644 rc
= sata_link_resume(link
, timing
, deadline
);
3646 DPRINTK("EXIT, rc=%d\n", rc
);
3651 * sata_std_hardreset - reset host port via SATA phy reset
3652 * @link: link to reset
3653 * @class: resulting class of attached device
3654 * @deadline: deadline jiffies for the operation
3656 * SATA phy-reset host port using DET bits of SControl register,
3657 * wait for !BSY and classify the attached device.
3660 * Kernel thread context (may sleep)
3663 * 0 on success, -errno otherwise.
3665 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3666 unsigned long deadline
)
3668 struct ata_port
*ap
= link
->ap
;
3669 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3675 rc
= sata_link_hardreset(link
, timing
, deadline
);
3677 ata_link_printk(link
, KERN_ERR
,
3678 "COMRESET failed (errno=%d)\n", rc
);
3682 /* TODO: phy layer with polling, timeouts, etc. */
3683 if (ata_link_offline(link
)) {
3684 *class = ATA_DEV_NONE
;
3685 DPRINTK("EXIT, link offline\n");
3689 /* wait a while before checking status, see SRST for more info */
3692 /* If PMP is supported, we have to do follow-up SRST. Note
3693 * that some PMPs don't send D2H Reg FIS after hardreset at
3694 * all if the first port is empty. Wait for it just for a
3695 * second and request follow-up SRST.
3697 if (ap
->flags
& ATA_FLAG_PMP
) {
3698 ata_wait_ready(ap
, jiffies
+ HZ
);
3702 rc
= ata_wait_ready(ap
, deadline
);
3703 /* link occupied, -ENODEV too is an error */
3705 ata_link_printk(link
, KERN_ERR
,
3706 "COMRESET failed (errno=%d)\n", rc
);
3710 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3712 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3714 DPRINTK("EXIT, class=%u\n", *class);
3719 * ata_std_postreset - standard postreset callback
3720 * @link: the target ata_link
3721 * @classes: classes of attached devices
3723 * This function is invoked after a successful reset. Note that
3724 * the device might have been reset more than once using
3725 * different reset methods before postreset is invoked.
3728 * Kernel thread context (may sleep)
3730 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3732 struct ata_port
*ap
= link
->ap
;
3737 /* print link status */
3738 sata_print_link_status(link
);
3741 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3742 sata_scr_write(link
, SCR_ERROR
, serror
);
3744 /* is double-select really necessary? */
3745 if (classes
[0] != ATA_DEV_NONE
)
3746 ap
->ops
->dev_select(ap
, 1);
3747 if (classes
[1] != ATA_DEV_NONE
)
3748 ap
->ops
->dev_select(ap
, 0);
3750 /* bail out if no device is present */
3751 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3752 DPRINTK("EXIT, no device\n");
3756 /* set up device control */
3757 if (ap
->ioaddr
.ctl_addr
)
3758 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3764 * ata_dev_same_device - Determine whether new ID matches configured device
3765 * @dev: device to compare against
3766 * @new_class: class of the new device
3767 * @new_id: IDENTIFY page of the new device
3769 * Compare @new_class and @new_id against @dev and determine
3770 * whether @dev is the device indicated by @new_class and
3777 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3779 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3782 const u16
*old_id
= dev
->id
;
3783 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3784 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3786 if (dev
->class != new_class
) {
3787 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3788 dev
->class, new_class
);
3792 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3793 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3794 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3795 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3797 if (strcmp(model
[0], model
[1])) {
3798 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3799 "'%s' != '%s'\n", model
[0], model
[1]);
3803 if (strcmp(serial
[0], serial
[1])) {
3804 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3805 "'%s' != '%s'\n", serial
[0], serial
[1]);
3813 * ata_dev_reread_id - Re-read IDENTIFY data
3814 * @dev: target ATA device
3815 * @readid_flags: read ID flags
3817 * Re-read IDENTIFY page and make sure @dev is still attached to
3821 * Kernel thread context (may sleep)
3824 * 0 on success, negative errno otherwise
3826 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3828 unsigned int class = dev
->class;
3829 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3833 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3837 /* is the device still there? */
3838 if (!ata_dev_same_device(dev
, class, id
))
3841 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3846 * ata_dev_revalidate - Revalidate ATA device
3847 * @dev: device to revalidate
3848 * @new_class: new class code
3849 * @readid_flags: read ID flags
3851 * Re-read IDENTIFY page, make sure @dev is still attached to the
3852 * port and reconfigure it according to the new IDENTIFY page.
3855 * Kernel thread context (may sleep)
3858 * 0 on success, negative errno otherwise
3860 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3861 unsigned int readid_flags
)
3863 u64 n_sectors
= dev
->n_sectors
;
3866 if (!ata_dev_enabled(dev
))
3869 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3870 if (ata_class_enabled(new_class
) &&
3871 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3872 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3873 dev
->class, new_class
);
3879 rc
= ata_dev_reread_id(dev
, readid_flags
);
3883 /* configure device according to the new ID */
3884 rc
= ata_dev_configure(dev
);
3888 /* verify n_sectors hasn't changed */
3889 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3890 dev
->n_sectors
!= n_sectors
) {
3891 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3893 (unsigned long long)n_sectors
,
3894 (unsigned long long)dev
->n_sectors
);
3896 /* restore original n_sectors */
3897 dev
->n_sectors
= n_sectors
;
3906 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3910 struct ata_blacklist_entry
{
3911 const char *model_num
;
3912 const char *model_rev
;
3913 unsigned long horkage
;
3916 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3917 /* Devices with DMA related problems under Linux */
3918 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3919 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3920 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3921 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3922 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3923 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3924 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3925 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3926 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3927 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3928 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3929 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3930 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3931 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3932 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3933 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3934 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3935 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3936 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3937 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3938 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3939 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3940 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3941 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3942 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3943 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3944 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3945 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3946 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3947 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3948 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3949 { "IOMEGA ZIP 250 ATAPI Floppy",
3950 NULL
, ATA_HORKAGE_NODMA
},
3951 /* Odd clown on sil3726/4726 PMPs */
3952 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
3953 ATA_HORKAGE_SKIP_PM
},
3955 /* Weird ATAPI devices */
3956 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3958 /* Devices we expect to fail diagnostics */
3960 /* Devices where NCQ should be avoided */
3962 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3963 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3964 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3966 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3967 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3968 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
3969 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
3970 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3972 /* Blacklist entries taken from Silicon Image 3124/3132
3973 Windows driver .inf file - also several Linux problem reports */
3974 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3975 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3976 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3977 /* Drives which do spurious command completion */
3978 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3979 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3980 { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ
, },
3981 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3982 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3983 { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ
, },
3984 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3985 { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3986 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3987 { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ
, },
3988 { "ST9160821AS", "3.CCD", ATA_HORKAGE_NONCQ
, },
3989 { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ
, },
3990 { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ
, },
3991 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3993 /* devices which puke on READ_NATIVE_MAX */
3994 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3995 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3996 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3997 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3999 /* Devices which report 1 sector over size HPA */
4000 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4001 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4007 int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4013 * check for trailing wildcard: *\0
4015 p
= strchr(patt
, wildchar
);
4016 if (p
&& ((*(p
+ 1)) == 0))
4027 return strncmp(patt
, name
, len
);
4030 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4032 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4033 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4034 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4036 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4037 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4039 while (ad
->model_num
) {
4040 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4041 if (ad
->model_rev
== NULL
)
4043 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4051 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4053 /* We don't support polling DMA.
4054 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4055 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4057 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4058 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4060 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4064 * ata_dev_xfermask - Compute supported xfermask of the given device
4065 * @dev: Device to compute xfermask for
4067 * Compute supported xfermask of @dev and store it in
4068 * dev->*_mask. This function is responsible for applying all
4069 * known limits including host controller limits, device
4075 static void ata_dev_xfermask(struct ata_device
*dev
)
4077 struct ata_link
*link
= dev
->link
;
4078 struct ata_port
*ap
= link
->ap
;
4079 struct ata_host
*host
= ap
->host
;
4080 unsigned long xfer_mask
;
4082 /* controller modes available */
4083 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4084 ap
->mwdma_mask
, ap
->udma_mask
);
4086 /* drive modes available */
4087 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4088 dev
->mwdma_mask
, dev
->udma_mask
);
4089 xfer_mask
&= ata_id_xfermask(dev
->id
);
4092 * CFA Advanced TrueIDE timings are not allowed on a shared
4095 if (ata_dev_pair(dev
)) {
4096 /* No PIO5 or PIO6 */
4097 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4098 /* No MWDMA3 or MWDMA 4 */
4099 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4102 if (ata_dma_blacklisted(dev
)) {
4103 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4104 ata_dev_printk(dev
, KERN_WARNING
,
4105 "device is on DMA blacklist, disabling DMA\n");
4108 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4109 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4110 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4111 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4112 "other device, disabling DMA\n");
4115 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4116 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4118 if (ap
->ops
->mode_filter
)
4119 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4121 /* Apply cable rule here. Don't apply it early because when
4122 * we handle hot plug the cable type can itself change.
4123 * Check this last so that we know if the transfer rate was
4124 * solely limited by the cable.
4125 * Unknown or 80 wire cables reported host side are checked
4126 * drive side as well. Cases where we know a 40wire cable
4127 * is used safely for 80 are not checked here.
4129 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4130 /* UDMA/44 or higher would be available */
4131 if((ap
->cbl
== ATA_CBL_PATA40
) ||
4132 (ata_drive_40wire(dev
->id
) &&
4133 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4134 ap
->cbl
== ATA_CBL_PATA80
))) {
4135 ata_dev_printk(dev
, KERN_WARNING
,
4136 "limited to UDMA/33 due to 40-wire cable\n");
4137 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4140 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4141 &dev
->mwdma_mask
, &dev
->udma_mask
);
4145 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4146 * @dev: Device to which command will be sent
4148 * Issue SET FEATURES - XFER MODE command to device @dev
4152 * PCI/etc. bus probe sem.
4155 * 0 on success, AC_ERR_* mask otherwise.
4158 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4160 struct ata_taskfile tf
;
4161 unsigned int err_mask
;
4163 /* set up set-features taskfile */
4164 DPRINTK("set features - xfer mode\n");
4166 /* Some controllers and ATAPI devices show flaky interrupt
4167 * behavior after setting xfer mode. Use polling instead.
4169 ata_tf_init(dev
, &tf
);
4170 tf
.command
= ATA_CMD_SET_FEATURES
;
4171 tf
.feature
= SETFEATURES_XFER
;
4172 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4173 tf
.protocol
= ATA_PROT_NODATA
;
4174 tf
.nsect
= dev
->xfer_mode
;
4176 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4178 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4183 * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
4184 * @dev: Device to which command will be sent
4185 * @enable: Whether to enable or disable the feature
4187 * Issue SET FEATURES - SATA FEATURES command to device @dev
4188 * on port @ap with sector count set to indicate Asynchronous
4189 * Notification feature
4192 * PCI/etc. bus probe sem.
4195 * 0 on success, AC_ERR_* mask otherwise.
4197 static unsigned int ata_dev_set_AN(struct ata_device
*dev
, u8 enable
)
4199 struct ata_taskfile tf
;
4200 unsigned int err_mask
;
4202 /* set up set-features taskfile */
4203 DPRINTK("set features - SATA features\n");
4205 ata_tf_init(dev
, &tf
);
4206 tf
.command
= ATA_CMD_SET_FEATURES
;
4207 tf
.feature
= enable
;
4208 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4209 tf
.protocol
= ATA_PROT_NODATA
;
4212 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4214 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4219 * ata_dev_init_params - Issue INIT DEV PARAMS command
4220 * @dev: Device to which command will be sent
4221 * @heads: Number of heads (taskfile parameter)
4222 * @sectors: Number of sectors (taskfile parameter)
4225 * Kernel thread context (may sleep)
4228 * 0 on success, AC_ERR_* mask otherwise.
4230 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4231 u16 heads
, u16 sectors
)
4233 struct ata_taskfile tf
;
4234 unsigned int err_mask
;
4236 /* Number of sectors per track 1-255. Number of heads 1-16 */
4237 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4238 return AC_ERR_INVALID
;
4240 /* set up init dev params taskfile */
4241 DPRINTK("init dev params \n");
4243 ata_tf_init(dev
, &tf
);
4244 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4245 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4246 tf
.protocol
= ATA_PROT_NODATA
;
4248 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4250 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4251 /* A clean abort indicates an original or just out of spec drive
4252 and we should continue as we issue the setup based on the
4253 drive reported working geometry */
4254 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4257 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4262 * ata_sg_clean - Unmap DMA memory associated with command
4263 * @qc: Command containing DMA memory to be released
4265 * Unmap all mapped DMA memory associated with this command.
4268 * spin_lock_irqsave(host lock)
4270 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4272 struct ata_port
*ap
= qc
->ap
;
4273 struct scatterlist
*sg
= qc
->__sg
;
4274 int dir
= qc
->dma_dir
;
4275 void *pad_buf
= NULL
;
4277 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4278 WARN_ON(sg
== NULL
);
4280 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4281 WARN_ON(qc
->n_elem
> 1);
4283 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4285 /* if we padded the buffer out to 32-bit bound, and data
4286 * xfer direction is from-device, we must copy from the
4287 * pad buffer back into the supplied buffer
4289 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4290 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4292 if (qc
->flags
& ATA_QCFLAG_SG
) {
4294 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4295 /* restore last sg */
4296 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4298 struct scatterlist
*psg
= &qc
->pad_sgent
;
4299 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4300 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4301 kunmap_atomic(addr
, KM_IRQ0
);
4305 dma_unmap_single(ap
->dev
,
4306 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4309 sg
->length
+= qc
->pad_len
;
4311 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4312 pad_buf
, qc
->pad_len
);
4315 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4320 * ata_fill_sg - Fill PCI IDE PRD table
4321 * @qc: Metadata associated with taskfile to be transferred
4323 * Fill PCI IDE PRD (scatter-gather) table with segments
4324 * associated with the current disk command.
4327 * spin_lock_irqsave(host lock)
4330 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4332 struct ata_port
*ap
= qc
->ap
;
4333 struct scatterlist
*sg
;
4336 WARN_ON(qc
->__sg
== NULL
);
4337 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4340 ata_for_each_sg(sg
, qc
) {
4344 /* determine if physical DMA addr spans 64K boundary.
4345 * Note h/w doesn't support 64-bit, so we unconditionally
4346 * truncate dma_addr_t to u32.
4348 addr
= (u32
) sg_dma_address(sg
);
4349 sg_len
= sg_dma_len(sg
);
4352 offset
= addr
& 0xffff;
4354 if ((offset
+ sg_len
) > 0x10000)
4355 len
= 0x10000 - offset
;
4357 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4358 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4359 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4368 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4372 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4373 * @qc: Metadata associated with taskfile to be transferred
4375 * Fill PCI IDE PRD (scatter-gather) table with segments
4376 * associated with the current disk command. Perform the fill
4377 * so that we avoid writing any length 64K records for
4378 * controllers that don't follow the spec.
4381 * spin_lock_irqsave(host lock)
4384 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4386 struct ata_port
*ap
= qc
->ap
;
4387 struct scatterlist
*sg
;
4390 WARN_ON(qc
->__sg
== NULL
);
4391 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4394 ata_for_each_sg(sg
, qc
) {
4396 u32 sg_len
, len
, blen
;
4398 /* determine if physical DMA addr spans 64K boundary.
4399 * Note h/w doesn't support 64-bit, so we unconditionally
4400 * truncate dma_addr_t to u32.
4402 addr
= (u32
) sg_dma_address(sg
);
4403 sg_len
= sg_dma_len(sg
);
4406 offset
= addr
& 0xffff;
4408 if ((offset
+ sg_len
) > 0x10000)
4409 len
= 0x10000 - offset
;
4411 blen
= len
& 0xffff;
4412 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4414 /* Some PATA chipsets like the CS5530 can't
4415 cope with 0x0000 meaning 64K as the spec says */
4416 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4418 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4420 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4421 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4430 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4434 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4435 * @qc: Metadata associated with taskfile to check
4437 * Allow low-level driver to filter ATA PACKET commands, returning
4438 * a status indicating whether or not it is OK to use DMA for the
4439 * supplied PACKET command.
4442 * spin_lock_irqsave(host lock)
4444 * RETURNS: 0 when ATAPI DMA can be used
4447 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4449 struct ata_port
*ap
= qc
->ap
;
4451 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4452 * few ATAPI devices choke on such DMA requests.
4454 if (unlikely(qc
->nbytes
& 15))
4457 if (ap
->ops
->check_atapi_dma
)
4458 return ap
->ops
->check_atapi_dma(qc
);
4464 * ata_std_qc_defer - Check whether a qc needs to be deferred
4465 * @qc: ATA command in question
4467 * Non-NCQ commands cannot run with any other command, NCQ or
4468 * not. As upper layer only knows the queue depth, we are
4469 * responsible for maintaining exclusion. This function checks
4470 * whether a new command @qc can be issued.
4473 * spin_lock_irqsave(host lock)
4476 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4478 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4480 struct ata_link
*link
= qc
->dev
->link
;
4482 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4483 if (!ata_tag_valid(link
->active_tag
))
4486 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4490 return ATA_DEFER_LINK
;
4494 * ata_qc_prep - Prepare taskfile for submission
4495 * @qc: Metadata associated with taskfile to be prepared
4497 * Prepare ATA taskfile for submission.
4500 * spin_lock_irqsave(host lock)
4502 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4504 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4511 * ata_dumb_qc_prep - Prepare taskfile for submission
4512 * @qc: Metadata associated with taskfile to be prepared
4514 * Prepare ATA taskfile for submission.
4517 * spin_lock_irqsave(host lock)
4519 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4521 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4524 ata_fill_sg_dumb(qc
);
4527 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4530 * ata_sg_init_one - Associate command with memory buffer
4531 * @qc: Command to be associated
4532 * @buf: Memory buffer
4533 * @buflen: Length of memory buffer, in bytes.
4535 * Initialize the data-related elements of queued_cmd @qc
4536 * to point to a single memory buffer, @buf of byte length @buflen.
4539 * spin_lock_irqsave(host lock)
4542 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4544 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4546 qc
->__sg
= &qc
->sgent
;
4548 qc
->orig_n_elem
= 1;
4550 qc
->nbytes
= buflen
;
4551 qc
->cursg
= qc
->__sg
;
4553 sg_init_one(&qc
->sgent
, buf
, buflen
);
4557 * ata_sg_init - Associate command with scatter-gather table.
4558 * @qc: Command to be associated
4559 * @sg: Scatter-gather table.
4560 * @n_elem: Number of elements in s/g table.
4562 * Initialize the data-related elements of queued_cmd @qc
4563 * to point to a scatter-gather table @sg, containing @n_elem
4567 * spin_lock_irqsave(host lock)
4570 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4571 unsigned int n_elem
)
4573 qc
->flags
|= ATA_QCFLAG_SG
;
4575 qc
->n_elem
= n_elem
;
4576 qc
->orig_n_elem
= n_elem
;
4577 qc
->cursg
= qc
->__sg
;
4581 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4582 * @qc: Command with memory buffer to be mapped.
4584 * DMA-map the memory buffer associated with queued_cmd @qc.
4587 * spin_lock_irqsave(host lock)
4590 * Zero on success, negative on error.
4593 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4595 struct ata_port
*ap
= qc
->ap
;
4596 int dir
= qc
->dma_dir
;
4597 struct scatterlist
*sg
= qc
->__sg
;
4598 dma_addr_t dma_address
;
4601 /* we must lengthen transfers to end on a 32-bit boundary */
4602 qc
->pad_len
= sg
->length
& 3;
4604 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4605 struct scatterlist
*psg
= &qc
->pad_sgent
;
4607 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4609 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4611 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4612 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4615 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4616 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4618 sg
->length
-= qc
->pad_len
;
4619 if (sg
->length
== 0)
4622 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4623 sg
->length
, qc
->pad_len
);
4631 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4633 if (dma_mapping_error(dma_address
)) {
4635 sg
->length
+= qc
->pad_len
;
4639 sg_dma_address(sg
) = dma_address
;
4640 sg_dma_len(sg
) = sg
->length
;
4643 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4644 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4650 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4651 * @qc: Command with scatter-gather table to be mapped.
4653 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4656 * spin_lock_irqsave(host lock)
4659 * Zero on success, negative on error.
4663 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4665 struct ata_port
*ap
= qc
->ap
;
4666 struct scatterlist
*sg
= qc
->__sg
;
4667 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4668 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4670 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4671 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4673 /* we must lengthen transfers to end on a 32-bit boundary */
4674 qc
->pad_len
= lsg
->length
& 3;
4676 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4677 struct scatterlist
*psg
= &qc
->pad_sgent
;
4678 unsigned int offset
;
4680 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4682 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4685 * psg->page/offset are used to copy to-be-written
4686 * data in this function or read data in ata_sg_clean.
4688 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4689 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4690 psg
->offset
= offset_in_page(offset
);
4692 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4693 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4694 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4695 kunmap_atomic(addr
, KM_IRQ0
);
4698 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4699 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4701 lsg
->length
-= qc
->pad_len
;
4702 if (lsg
->length
== 0)
4705 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4706 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4709 pre_n_elem
= qc
->n_elem
;
4710 if (trim_sg
&& pre_n_elem
)
4719 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4721 /* restore last sg */
4722 lsg
->length
+= qc
->pad_len
;
4726 DPRINTK("%d sg elements mapped\n", n_elem
);
4729 qc
->n_elem
= n_elem
;
4735 * swap_buf_le16 - swap halves of 16-bit words in place
4736 * @buf: Buffer to swap
4737 * @buf_words: Number of 16-bit words in buffer.
4739 * Swap halves of 16-bit words if needed to convert from
4740 * little-endian byte order to native cpu byte order, or
4744 * Inherited from caller.
4746 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4751 for (i
= 0; i
< buf_words
; i
++)
4752 buf
[i
] = le16_to_cpu(buf
[i
]);
4753 #endif /* __BIG_ENDIAN */
4757 * ata_data_xfer - Transfer data by PIO
4758 * @adev: device to target
4760 * @buflen: buffer length
4761 * @write_data: read/write
4763 * Transfer data from/to the device data register by PIO.
4766 * Inherited from caller.
4768 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4769 unsigned int buflen
, int write_data
)
4771 struct ata_port
*ap
= adev
->link
->ap
;
4772 unsigned int words
= buflen
>> 1;
4774 /* Transfer multiple of 2 bytes */
4776 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4778 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4780 /* Transfer trailing 1 byte, if any. */
4781 if (unlikely(buflen
& 0x01)) {
4782 u16 align_buf
[1] = { 0 };
4783 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4786 memcpy(align_buf
, trailing_buf
, 1);
4787 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4789 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4790 memcpy(trailing_buf
, align_buf
, 1);
4796 * ata_data_xfer_noirq - Transfer data by PIO
4797 * @adev: device to target
4799 * @buflen: buffer length
4800 * @write_data: read/write
4802 * Transfer data from/to the device data register by PIO. Do the
4803 * transfer with interrupts disabled.
4806 * Inherited from caller.
4808 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4809 unsigned int buflen
, int write_data
)
4811 unsigned long flags
;
4812 local_irq_save(flags
);
4813 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4814 local_irq_restore(flags
);
4819 * ata_pio_sector - Transfer a sector of data.
4820 * @qc: Command on going
4822 * Transfer qc->sect_size bytes of data from/to the ATA device.
4825 * Inherited from caller.
4828 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4830 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4831 struct ata_port
*ap
= qc
->ap
;
4833 unsigned int offset
;
4836 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4837 ap
->hsm_task_state
= HSM_ST_LAST
;
4839 page
= qc
->cursg
->page
;
4840 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
4842 /* get the current page and offset */
4843 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4844 offset
%= PAGE_SIZE
;
4846 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4848 if (PageHighMem(page
)) {
4849 unsigned long flags
;
4851 /* FIXME: use a bounce buffer */
4852 local_irq_save(flags
);
4853 buf
= kmap_atomic(page
, KM_IRQ0
);
4855 /* do the actual data transfer */
4856 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4858 kunmap_atomic(buf
, KM_IRQ0
);
4859 local_irq_restore(flags
);
4861 buf
= page_address(page
);
4862 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4865 qc
->curbytes
+= qc
->sect_size
;
4866 qc
->cursg_ofs
+= qc
->sect_size
;
4868 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
4869 qc
->cursg
= sg_next(qc
->cursg
);
4875 * ata_pio_sectors - Transfer one or many sectors.
4876 * @qc: Command on going
4878 * Transfer one or many sectors of data from/to the
4879 * ATA device for the DRQ request.
4882 * Inherited from caller.
4885 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4887 if (is_multi_taskfile(&qc
->tf
)) {
4888 /* READ/WRITE MULTIPLE */
4891 WARN_ON(qc
->dev
->multi_count
== 0);
4893 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4894 qc
->dev
->multi_count
);
4900 ata_altstatus(qc
->ap
); /* flush */
4904 * atapi_send_cdb - Write CDB bytes to hardware
4905 * @ap: Port to which ATAPI device is attached.
4906 * @qc: Taskfile currently active
4908 * When device has indicated its readiness to accept
4909 * a CDB, this function is called. Send the CDB.
4915 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4918 DPRINTK("send cdb\n");
4919 WARN_ON(qc
->dev
->cdb_len
< 12);
4921 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4922 ata_altstatus(ap
); /* flush */
4924 switch (qc
->tf
.protocol
) {
4925 case ATA_PROT_ATAPI
:
4926 ap
->hsm_task_state
= HSM_ST
;
4928 case ATA_PROT_ATAPI_NODATA
:
4929 ap
->hsm_task_state
= HSM_ST_LAST
;
4931 case ATA_PROT_ATAPI_DMA
:
4932 ap
->hsm_task_state
= HSM_ST_LAST
;
4933 /* initiate bmdma */
4934 ap
->ops
->bmdma_start(qc
);
4940 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4941 * @qc: Command on going
4942 * @bytes: number of bytes
4944 * Transfer Transfer data from/to the ATAPI device.
4947 * Inherited from caller.
4951 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4953 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4954 struct scatterlist
*sg
= qc
->__sg
;
4955 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4956 struct ata_port
*ap
= qc
->ap
;
4959 unsigned int offset
, count
;
4962 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4963 ap
->hsm_task_state
= HSM_ST_LAST
;
4966 if (unlikely(no_more_sg
)) {
4968 * The end of qc->sg is reached and the device expects
4969 * more data to transfer. In order not to overrun qc->sg
4970 * and fulfill length specified in the byte count register,
4971 * - for read case, discard trailing data from the device
4972 * - for write case, padding zero data to the device
4974 u16 pad_buf
[1] = { 0 };
4975 unsigned int words
= bytes
>> 1;
4978 if (words
) /* warning if bytes > 1 */
4979 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4980 "%u bytes trailing data\n", bytes
);
4982 for (i
= 0; i
< words
; i
++)
4983 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4985 ap
->hsm_task_state
= HSM_ST_LAST
;
4992 offset
= sg
->offset
+ qc
->cursg_ofs
;
4994 /* get the current page and offset */
4995 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4996 offset
%= PAGE_SIZE
;
4998 /* don't overrun current sg */
4999 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5001 /* don't cross page boundaries */
5002 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5004 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5006 if (PageHighMem(page
)) {
5007 unsigned long flags
;
5009 /* FIXME: use bounce buffer */
5010 local_irq_save(flags
);
5011 buf
= kmap_atomic(page
, KM_IRQ0
);
5013 /* do the actual data transfer */
5014 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5016 kunmap_atomic(buf
, KM_IRQ0
);
5017 local_irq_restore(flags
);
5019 buf
= page_address(page
);
5020 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5024 qc
->curbytes
+= count
;
5025 qc
->cursg_ofs
+= count
;
5027 if (qc
->cursg_ofs
== sg
->length
) {
5028 if (qc
->cursg
== lsg
)
5031 qc
->cursg
= sg_next(qc
->cursg
);
5040 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5041 * @qc: Command on going
5043 * Transfer Transfer data from/to the ATAPI device.
5046 * Inherited from caller.
5049 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5051 struct ata_port
*ap
= qc
->ap
;
5052 struct ata_device
*dev
= qc
->dev
;
5053 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5054 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5056 /* Abuse qc->result_tf for temp storage of intermediate TF
5057 * here to save some kernel stack usage.
5058 * For normal completion, qc->result_tf is not relevant. For
5059 * error, qc->result_tf is later overwritten by ata_qc_complete().
5060 * So, the correctness of qc->result_tf is not affected.
5062 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5063 ireason
= qc
->result_tf
.nsect
;
5064 bc_lo
= qc
->result_tf
.lbam
;
5065 bc_hi
= qc
->result_tf
.lbah
;
5066 bytes
= (bc_hi
<< 8) | bc_lo
;
5068 /* shall be cleared to zero, indicating xfer of data */
5069 if (ireason
& (1 << 0))
5072 /* make sure transfer direction matches expected */
5073 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5074 if (do_write
!= i_write
)
5077 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5079 __atapi_pio_bytes(qc
, bytes
);
5080 ata_altstatus(ap
); /* flush */
5085 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5086 qc
->err_mask
|= AC_ERR_HSM
;
5087 ap
->hsm_task_state
= HSM_ST_ERR
;
5091 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5092 * @ap: the target ata_port
5096 * 1 if ok in workqueue, 0 otherwise.
5099 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5101 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5104 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5105 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5106 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5109 if (is_atapi_taskfile(&qc
->tf
) &&
5110 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5118 * ata_hsm_qc_complete - finish a qc running on standard HSM
5119 * @qc: Command to complete
5120 * @in_wq: 1 if called from workqueue, 0 otherwise
5122 * Finish @qc which is running on standard HSM.
5125 * If @in_wq is zero, spin_lock_irqsave(host lock).
5126 * Otherwise, none on entry and grabs host lock.
5128 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5130 struct ata_port
*ap
= qc
->ap
;
5131 unsigned long flags
;
5133 if (ap
->ops
->error_handler
) {
5135 spin_lock_irqsave(ap
->lock
, flags
);
5137 /* EH might have kicked in while host lock is
5140 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5142 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5143 ap
->ops
->irq_on(ap
);
5144 ata_qc_complete(qc
);
5146 ata_port_freeze(ap
);
5149 spin_unlock_irqrestore(ap
->lock
, flags
);
5151 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5152 ata_qc_complete(qc
);
5154 ata_port_freeze(ap
);
5158 spin_lock_irqsave(ap
->lock
, flags
);
5159 ap
->ops
->irq_on(ap
);
5160 ata_qc_complete(qc
);
5161 spin_unlock_irqrestore(ap
->lock
, flags
);
5163 ata_qc_complete(qc
);
5168 * ata_hsm_move - move the HSM to the next state.
5169 * @ap: the target ata_port
5171 * @status: current device status
5172 * @in_wq: 1 if called from workqueue, 0 otherwise
5175 * 1 when poll next status needed, 0 otherwise.
5177 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5178 u8 status
, int in_wq
)
5180 unsigned long flags
= 0;
5183 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5185 /* Make sure ata_qc_issue_prot() does not throw things
5186 * like DMA polling into the workqueue. Notice that
5187 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5189 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5192 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5193 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5195 switch (ap
->hsm_task_state
) {
5197 /* Send first data block or PACKET CDB */
5199 /* If polling, we will stay in the work queue after
5200 * sending the data. Otherwise, interrupt handler
5201 * takes over after sending the data.
5203 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5205 /* check device status */
5206 if (unlikely((status
& ATA_DRQ
) == 0)) {
5207 /* handle BSY=0, DRQ=0 as error */
5208 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5209 /* device stops HSM for abort/error */
5210 qc
->err_mask
|= AC_ERR_DEV
;
5212 /* HSM violation. Let EH handle this */
5213 qc
->err_mask
|= AC_ERR_HSM
;
5215 ap
->hsm_task_state
= HSM_ST_ERR
;
5219 /* Device should not ask for data transfer (DRQ=1)
5220 * when it finds something wrong.
5221 * We ignore DRQ here and stop the HSM by
5222 * changing hsm_task_state to HSM_ST_ERR and
5223 * let the EH abort the command or reset the device.
5225 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5226 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5227 "error, dev_stat 0x%X\n", status
);
5228 qc
->err_mask
|= AC_ERR_HSM
;
5229 ap
->hsm_task_state
= HSM_ST_ERR
;
5233 /* Send the CDB (atapi) or the first data block (ata pio out).
5234 * During the state transition, interrupt handler shouldn't
5235 * be invoked before the data transfer is complete and
5236 * hsm_task_state is changed. Hence, the following locking.
5239 spin_lock_irqsave(ap
->lock
, flags
);
5241 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5242 /* PIO data out protocol.
5243 * send first data block.
5246 /* ata_pio_sectors() might change the state
5247 * to HSM_ST_LAST. so, the state is changed here
5248 * before ata_pio_sectors().
5250 ap
->hsm_task_state
= HSM_ST
;
5251 ata_pio_sectors(qc
);
5254 atapi_send_cdb(ap
, qc
);
5257 spin_unlock_irqrestore(ap
->lock
, flags
);
5259 /* if polling, ata_pio_task() handles the rest.
5260 * otherwise, interrupt handler takes over from here.
5265 /* complete command or read/write the data register */
5266 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5267 /* ATAPI PIO protocol */
5268 if ((status
& ATA_DRQ
) == 0) {
5269 /* No more data to transfer or device error.
5270 * Device error will be tagged in HSM_ST_LAST.
5272 ap
->hsm_task_state
= HSM_ST_LAST
;
5276 /* Device should not ask for data transfer (DRQ=1)
5277 * when it finds something wrong.
5278 * We ignore DRQ here and stop the HSM by
5279 * changing hsm_task_state to HSM_ST_ERR and
5280 * let the EH abort the command or reset the device.
5282 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5283 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5284 "device error, dev_stat 0x%X\n",
5286 qc
->err_mask
|= AC_ERR_HSM
;
5287 ap
->hsm_task_state
= HSM_ST_ERR
;
5291 atapi_pio_bytes(qc
);
5293 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5294 /* bad ireason reported by device */
5298 /* ATA PIO protocol */
5299 if (unlikely((status
& ATA_DRQ
) == 0)) {
5300 /* handle BSY=0, DRQ=0 as error */
5301 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5302 /* device stops HSM for abort/error */
5303 qc
->err_mask
|= AC_ERR_DEV
;
5305 /* HSM violation. Let EH handle this.
5306 * Phantom devices also trigger this
5307 * condition. Mark hint.
5309 qc
->err_mask
|= AC_ERR_HSM
|
5312 ap
->hsm_task_state
= HSM_ST_ERR
;
5316 /* For PIO reads, some devices may ask for
5317 * data transfer (DRQ=1) alone with ERR=1.
5318 * We respect DRQ here and transfer one
5319 * block of junk data before changing the
5320 * hsm_task_state to HSM_ST_ERR.
5322 * For PIO writes, ERR=1 DRQ=1 doesn't make
5323 * sense since the data block has been
5324 * transferred to the device.
5326 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5327 /* data might be corrputed */
5328 qc
->err_mask
|= AC_ERR_DEV
;
5330 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5331 ata_pio_sectors(qc
);
5332 status
= ata_wait_idle(ap
);
5335 if (status
& (ATA_BUSY
| ATA_DRQ
))
5336 qc
->err_mask
|= AC_ERR_HSM
;
5338 /* ata_pio_sectors() might change the
5339 * state to HSM_ST_LAST. so, the state
5340 * is changed after ata_pio_sectors().
5342 ap
->hsm_task_state
= HSM_ST_ERR
;
5346 ata_pio_sectors(qc
);
5348 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5349 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5351 status
= ata_wait_idle(ap
);
5360 if (unlikely(!ata_ok(status
))) {
5361 qc
->err_mask
|= __ac_err_mask(status
);
5362 ap
->hsm_task_state
= HSM_ST_ERR
;
5366 /* no more data to transfer */
5367 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5368 ap
->print_id
, qc
->dev
->devno
, status
);
5370 WARN_ON(qc
->err_mask
);
5372 ap
->hsm_task_state
= HSM_ST_IDLE
;
5374 /* complete taskfile transaction */
5375 ata_hsm_qc_complete(qc
, in_wq
);
5381 /* make sure qc->err_mask is available to
5382 * know what's wrong and recover
5384 WARN_ON(qc
->err_mask
== 0);
5386 ap
->hsm_task_state
= HSM_ST_IDLE
;
5388 /* complete taskfile transaction */
5389 ata_hsm_qc_complete(qc
, in_wq
);
5401 static void ata_pio_task(struct work_struct
*work
)
5403 struct ata_port
*ap
=
5404 container_of(work
, struct ata_port
, port_task
.work
);
5405 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5410 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5413 * This is purely heuristic. This is a fast path.
5414 * Sometimes when we enter, BSY will be cleared in
5415 * a chk-status or two. If not, the drive is probably seeking
5416 * or something. Snooze for a couple msecs, then
5417 * chk-status again. If still busy, queue delayed work.
5419 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5420 if (status
& ATA_BUSY
) {
5422 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5423 if (status
& ATA_BUSY
) {
5424 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5430 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5432 /* another command or interrupt handler
5433 * may be running at this point.
5440 * ata_qc_new - Request an available ATA command, for queueing
5441 * @ap: Port associated with device @dev
5442 * @dev: Device from whom we request an available command structure
5448 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5450 struct ata_queued_cmd
*qc
= NULL
;
5453 /* no command while frozen */
5454 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5457 /* the last tag is reserved for internal command. */
5458 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5459 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5460 qc
= __ata_qc_from_tag(ap
, i
);
5471 * ata_qc_new_init - Request an available ATA command, and initialize it
5472 * @dev: Device from whom we request an available command structure
5478 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5480 struct ata_port
*ap
= dev
->link
->ap
;
5481 struct ata_queued_cmd
*qc
;
5483 qc
= ata_qc_new(ap
);
5496 * ata_qc_free - free unused ata_queued_cmd
5497 * @qc: Command to complete
5499 * Designed to free unused ata_queued_cmd object
5500 * in case something prevents using it.
5503 * spin_lock_irqsave(host lock)
5505 void ata_qc_free(struct ata_queued_cmd
*qc
)
5507 struct ata_port
*ap
= qc
->ap
;
5510 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5514 if (likely(ata_tag_valid(tag
))) {
5515 qc
->tag
= ATA_TAG_POISON
;
5516 clear_bit(tag
, &ap
->qc_allocated
);
5520 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5522 struct ata_port
*ap
= qc
->ap
;
5523 struct ata_link
*link
= qc
->dev
->link
;
5525 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5526 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5528 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5531 /* command should be marked inactive atomically with qc completion */
5532 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5533 link
->sactive
&= ~(1 << qc
->tag
);
5535 ap
->nr_active_links
--;
5537 link
->active_tag
= ATA_TAG_POISON
;
5538 ap
->nr_active_links
--;
5541 /* clear exclusive status */
5542 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5543 ap
->excl_link
== link
))
5544 ap
->excl_link
= NULL
;
5546 /* atapi: mark qc as inactive to prevent the interrupt handler
5547 * from completing the command twice later, before the error handler
5548 * is called. (when rc != 0 and atapi request sense is needed)
5550 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5551 ap
->qc_active
&= ~(1 << qc
->tag
);
5553 /* call completion callback */
5554 qc
->complete_fn(qc
);
5557 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5559 struct ata_port
*ap
= qc
->ap
;
5561 qc
->result_tf
.flags
= qc
->tf
.flags
;
5562 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5566 * ata_qc_complete - Complete an active ATA command
5567 * @qc: Command to complete
5568 * @err_mask: ATA Status register contents
5570 * Indicate to the mid and upper layers that an ATA
5571 * command has completed, with either an ok or not-ok status.
5574 * spin_lock_irqsave(host lock)
5576 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5578 struct ata_port
*ap
= qc
->ap
;
5580 /* XXX: New EH and old EH use different mechanisms to
5581 * synchronize EH with regular execution path.
5583 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5584 * Normal execution path is responsible for not accessing a
5585 * failed qc. libata core enforces the rule by returning NULL
5586 * from ata_qc_from_tag() for failed qcs.
5588 * Old EH depends on ata_qc_complete() nullifying completion
5589 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5590 * not synchronize with interrupt handler. Only PIO task is
5593 if (ap
->ops
->error_handler
) {
5594 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5596 if (unlikely(qc
->err_mask
))
5597 qc
->flags
|= ATA_QCFLAG_FAILED
;
5599 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5600 if (!ata_tag_internal(qc
->tag
)) {
5601 /* always fill result TF for failed qc */
5603 ata_qc_schedule_eh(qc
);
5608 /* read result TF if requested */
5609 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5612 __ata_qc_complete(qc
);
5614 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5617 /* read result TF if failed or requested */
5618 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5621 __ata_qc_complete(qc
);
5626 * ata_qc_complete_multiple - Complete multiple qcs successfully
5627 * @ap: port in question
5628 * @qc_active: new qc_active mask
5629 * @finish_qc: LLDD callback invoked before completing a qc
5631 * Complete in-flight commands. This functions is meant to be
5632 * called from low-level driver's interrupt routine to complete
5633 * requests normally. ap->qc_active and @qc_active is compared
5634 * and commands are completed accordingly.
5637 * spin_lock_irqsave(host lock)
5640 * Number of completed commands on success, -errno otherwise.
5642 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5643 void (*finish_qc
)(struct ata_queued_cmd
*))
5649 done_mask
= ap
->qc_active
^ qc_active
;
5651 if (unlikely(done_mask
& qc_active
)) {
5652 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5653 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5657 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5658 struct ata_queued_cmd
*qc
;
5660 if (!(done_mask
& (1 << i
)))
5663 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5666 ata_qc_complete(qc
);
5674 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5676 struct ata_port
*ap
= qc
->ap
;
5678 switch (qc
->tf
.protocol
) {
5681 case ATA_PROT_ATAPI_DMA
:
5684 case ATA_PROT_ATAPI
:
5686 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5699 * ata_qc_issue - issue taskfile to device
5700 * @qc: command to issue to device
5702 * Prepare an ATA command to submission to device.
5703 * This includes mapping the data into a DMA-able
5704 * area, filling in the S/G table, and finally
5705 * writing the taskfile to hardware, starting the command.
5708 * spin_lock_irqsave(host lock)
5710 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5712 struct ata_port
*ap
= qc
->ap
;
5713 struct ata_link
*link
= qc
->dev
->link
;
5715 /* Make sure only one non-NCQ command is outstanding. The
5716 * check is skipped for old EH because it reuses active qc to
5717 * request ATAPI sense.
5719 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5721 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5722 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5725 ap
->nr_active_links
++;
5726 link
->sactive
|= 1 << qc
->tag
;
5728 WARN_ON(link
->sactive
);
5730 ap
->nr_active_links
++;
5731 link
->active_tag
= qc
->tag
;
5734 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5735 ap
->qc_active
|= 1 << qc
->tag
;
5737 if (ata_should_dma_map(qc
)) {
5738 if (qc
->flags
& ATA_QCFLAG_SG
) {
5739 if (ata_sg_setup(qc
))
5741 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5742 if (ata_sg_setup_one(qc
))
5746 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5749 ap
->ops
->qc_prep(qc
);
5751 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5752 if (unlikely(qc
->err_mask
))
5757 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5758 qc
->err_mask
|= AC_ERR_SYSTEM
;
5760 ata_qc_complete(qc
);
5764 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5765 * @qc: command to issue to device
5767 * Using various libata functions and hooks, this function
5768 * starts an ATA command. ATA commands are grouped into
5769 * classes called "protocols", and issuing each type of protocol
5770 * is slightly different.
5772 * May be used as the qc_issue() entry in ata_port_operations.
5775 * spin_lock_irqsave(host lock)
5778 * Zero on success, AC_ERR_* mask on failure
5781 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5783 struct ata_port
*ap
= qc
->ap
;
5785 /* Use polling pio if the LLD doesn't handle
5786 * interrupt driven pio and atapi CDB interrupt.
5788 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5789 switch (qc
->tf
.protocol
) {
5791 case ATA_PROT_NODATA
:
5792 case ATA_PROT_ATAPI
:
5793 case ATA_PROT_ATAPI_NODATA
:
5794 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5796 case ATA_PROT_ATAPI_DMA
:
5797 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5798 /* see ata_dma_blacklisted() */
5806 /* select the device */
5807 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5809 /* start the command */
5810 switch (qc
->tf
.protocol
) {
5811 case ATA_PROT_NODATA
:
5812 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5813 ata_qc_set_polling(qc
);
5815 ata_tf_to_host(ap
, &qc
->tf
);
5816 ap
->hsm_task_state
= HSM_ST_LAST
;
5818 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5819 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5824 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5826 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5827 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5828 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5829 ap
->hsm_task_state
= HSM_ST_LAST
;
5833 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5834 ata_qc_set_polling(qc
);
5836 ata_tf_to_host(ap
, &qc
->tf
);
5838 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5839 /* PIO data out protocol */
5840 ap
->hsm_task_state
= HSM_ST_FIRST
;
5841 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5843 /* always send first data block using
5844 * the ata_pio_task() codepath.
5847 /* PIO data in protocol */
5848 ap
->hsm_task_state
= HSM_ST
;
5850 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5851 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5853 /* if polling, ata_pio_task() handles the rest.
5854 * otherwise, interrupt handler takes over from here.
5860 case ATA_PROT_ATAPI
:
5861 case ATA_PROT_ATAPI_NODATA
:
5862 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5863 ata_qc_set_polling(qc
);
5865 ata_tf_to_host(ap
, &qc
->tf
);
5867 ap
->hsm_task_state
= HSM_ST_FIRST
;
5869 /* send cdb by polling if no cdb interrupt */
5870 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5871 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5872 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5875 case ATA_PROT_ATAPI_DMA
:
5876 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5878 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5879 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5880 ap
->hsm_task_state
= HSM_ST_FIRST
;
5882 /* send cdb by polling if no cdb interrupt */
5883 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5884 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5889 return AC_ERR_SYSTEM
;
5896 * ata_host_intr - Handle host interrupt for given (port, task)
5897 * @ap: Port on which interrupt arrived (possibly...)
5898 * @qc: Taskfile currently active in engine
5900 * Handle host interrupt for given queued command. Currently,
5901 * only DMA interrupts are handled. All other commands are
5902 * handled via polling with interrupts disabled (nIEN bit).
5905 * spin_lock_irqsave(host lock)
5908 * One if interrupt was handled, zero if not (shared irq).
5911 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5912 struct ata_queued_cmd
*qc
)
5914 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5915 u8 status
, host_stat
= 0;
5917 VPRINTK("ata%u: protocol %d task_state %d\n",
5918 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5920 /* Check whether we are expecting interrupt in this state */
5921 switch (ap
->hsm_task_state
) {
5923 /* Some pre-ATAPI-4 devices assert INTRQ
5924 * at this state when ready to receive CDB.
5927 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5928 * The flag was turned on only for atapi devices.
5929 * No need to check is_atapi_taskfile(&qc->tf) again.
5931 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5935 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5936 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5937 /* check status of DMA engine */
5938 host_stat
= ap
->ops
->bmdma_status(ap
);
5939 VPRINTK("ata%u: host_stat 0x%X\n",
5940 ap
->print_id
, host_stat
);
5942 /* if it's not our irq... */
5943 if (!(host_stat
& ATA_DMA_INTR
))
5946 /* before we do anything else, clear DMA-Start bit */
5947 ap
->ops
->bmdma_stop(qc
);
5949 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5950 /* error when transfering data to/from memory */
5951 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5952 ap
->hsm_task_state
= HSM_ST_ERR
;
5962 /* check altstatus */
5963 status
= ata_altstatus(ap
);
5964 if (status
& ATA_BUSY
)
5967 /* check main status, clearing INTRQ */
5968 status
= ata_chk_status(ap
);
5969 if (unlikely(status
& ATA_BUSY
))
5972 /* ack bmdma irq events */
5973 ap
->ops
->irq_clear(ap
);
5975 ata_hsm_move(ap
, qc
, status
, 0);
5977 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5978 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5979 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5981 return 1; /* irq handled */
5984 ap
->stats
.idle_irq
++;
5987 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5989 ap
->ops
->irq_clear(ap
);
5990 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5994 return 0; /* irq not handled */
5998 * ata_interrupt - Default ATA host interrupt handler
5999 * @irq: irq line (unused)
6000 * @dev_instance: pointer to our ata_host information structure
6002 * Default interrupt handler for PCI IDE devices. Calls
6003 * ata_host_intr() for each port that is not disabled.
6006 * Obtains host lock during operation.
6009 * IRQ_NONE or IRQ_HANDLED.
6012 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
6014 struct ata_host
*host
= dev_instance
;
6016 unsigned int handled
= 0;
6017 unsigned long flags
;
6019 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6020 spin_lock_irqsave(&host
->lock
, flags
);
6022 for (i
= 0; i
< host
->n_ports
; i
++) {
6023 struct ata_port
*ap
;
6025 ap
= host
->ports
[i
];
6027 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6028 struct ata_queued_cmd
*qc
;
6030 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6031 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6032 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6033 handled
|= ata_host_intr(ap
, qc
);
6037 spin_unlock_irqrestore(&host
->lock
, flags
);
6039 return IRQ_RETVAL(handled
);
6043 * sata_scr_valid - test whether SCRs are accessible
6044 * @link: ATA link to test SCR accessibility for
6046 * Test whether SCRs are accessible for @link.
6052 * 1 if SCRs are accessible, 0 otherwise.
6054 int sata_scr_valid(struct ata_link
*link
)
6056 struct ata_port
*ap
= link
->ap
;
6058 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6062 * sata_scr_read - read SCR register of the specified port
6063 * @link: ATA link to read SCR for
6065 * @val: Place to store read value
6067 * Read SCR register @reg of @link into *@val. This function is
6068 * guaranteed to succeed if @link is ap->link, the cable type of
6069 * the port is SATA and the port implements ->scr_read.
6072 * None if @link is ap->link. Kernel thread context otherwise.
6075 * 0 on success, negative errno on failure.
6077 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6079 if (ata_is_host_link(link
)) {
6080 struct ata_port
*ap
= link
->ap
;
6082 if (sata_scr_valid(link
))
6083 return ap
->ops
->scr_read(ap
, reg
, val
);
6087 return sata_pmp_scr_read(link
, reg
, val
);
6091 * sata_scr_write - write SCR register of the specified port
6092 * @link: ATA link to write SCR for
6093 * @reg: SCR to write
6094 * @val: value to write
6096 * Write @val to SCR register @reg of @link. This function is
6097 * guaranteed to succeed if @link is ap->link, the cable type of
6098 * the port is SATA and the port implements ->scr_read.
6101 * None if @link is ap->link. Kernel thread context otherwise.
6104 * 0 on success, negative errno on failure.
6106 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6108 if (ata_is_host_link(link
)) {
6109 struct ata_port
*ap
= link
->ap
;
6111 if (sata_scr_valid(link
))
6112 return ap
->ops
->scr_write(ap
, reg
, val
);
6116 return sata_pmp_scr_write(link
, reg
, val
);
6120 * sata_scr_write_flush - write SCR register of the specified port and flush
6121 * @link: ATA link to write SCR for
6122 * @reg: SCR to write
6123 * @val: value to write
6125 * This function is identical to sata_scr_write() except that this
6126 * function performs flush after writing to the register.
6129 * None if @link is ap->link. Kernel thread context otherwise.
6132 * 0 on success, negative errno on failure.
6134 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6136 if (ata_is_host_link(link
)) {
6137 struct ata_port
*ap
= link
->ap
;
6140 if (sata_scr_valid(link
)) {
6141 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6143 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6149 return sata_pmp_scr_write(link
, reg
, val
);
6153 * ata_link_online - test whether the given link is online
6154 * @link: ATA link to test
6156 * Test whether @link is online. Note that this function returns
6157 * 0 if online status of @link cannot be obtained, so
6158 * ata_link_online(link) != !ata_link_offline(link).
6164 * 1 if the port online status is available and online.
6166 int ata_link_online(struct ata_link
*link
)
6170 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6171 (sstatus
& 0xf) == 0x3)
6177 * ata_link_offline - test whether the given link is offline
6178 * @link: ATA link to test
6180 * Test whether @link is offline. Note that this function
6181 * returns 0 if offline status of @link cannot be obtained, so
6182 * ata_link_online(link) != !ata_link_offline(link).
6188 * 1 if the port offline status is available and offline.
6190 int ata_link_offline(struct ata_link
*link
)
6194 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6195 (sstatus
& 0xf) != 0x3)
6200 int ata_flush_cache(struct ata_device
*dev
)
6202 unsigned int err_mask
;
6205 if (!ata_try_flush_cache(dev
))
6208 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6209 cmd
= ATA_CMD_FLUSH_EXT
;
6211 cmd
= ATA_CMD_FLUSH
;
6213 /* This is wrong. On a failed flush we get back the LBA of the lost
6214 sector and we should (assuming it wasn't aborted as unknown) issue
6215 a further flush command to continue the writeback until it
6217 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6219 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6227 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6228 unsigned int action
, unsigned int ehi_flags
,
6231 unsigned long flags
;
6234 for (i
= 0; i
< host
->n_ports
; i
++) {
6235 struct ata_port
*ap
= host
->ports
[i
];
6236 struct ata_link
*link
;
6238 /* Previous resume operation might still be in
6239 * progress. Wait for PM_PENDING to clear.
6241 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6242 ata_port_wait_eh(ap
);
6243 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6246 /* request PM ops to EH */
6247 spin_lock_irqsave(ap
->lock
, flags
);
6252 ap
->pm_result
= &rc
;
6255 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6256 __ata_port_for_each_link(link
, ap
) {
6257 link
->eh_info
.action
|= action
;
6258 link
->eh_info
.flags
|= ehi_flags
;
6261 ata_port_schedule_eh(ap
);
6263 spin_unlock_irqrestore(ap
->lock
, flags
);
6265 /* wait and check result */
6267 ata_port_wait_eh(ap
);
6268 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6278 * ata_host_suspend - suspend host
6279 * @host: host to suspend
6282 * Suspend @host. Actual operation is performed by EH. This
6283 * function requests EH to perform PM operations and waits for EH
6287 * Kernel thread context (may sleep).
6290 * 0 on success, -errno on failure.
6292 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6296 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6298 host
->dev
->power
.power_state
= mesg
;
6303 * ata_host_resume - resume host
6304 * @host: host to resume
6306 * Resume @host. Actual operation is performed by EH. This
6307 * function requests EH to perform PM operations and returns.
6308 * Note that all resume operations are performed parallely.
6311 * Kernel thread context (may sleep).
6313 void ata_host_resume(struct ata_host
*host
)
6315 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6316 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6317 host
->dev
->power
.power_state
= PMSG_ON
;
6322 * ata_port_start - Set port up for dma.
6323 * @ap: Port to initialize
6325 * Called just after data structures for each port are
6326 * initialized. Allocates space for PRD table.
6328 * May be used as the port_start() entry in ata_port_operations.
6331 * Inherited from caller.
6333 int ata_port_start(struct ata_port
*ap
)
6335 struct device
*dev
= ap
->dev
;
6338 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6343 rc
= ata_pad_alloc(ap
, dev
);
6347 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6348 (unsigned long long)ap
->prd_dma
);
6353 * ata_dev_init - Initialize an ata_device structure
6354 * @dev: Device structure to initialize
6356 * Initialize @dev in preparation for probing.
6359 * Inherited from caller.
6361 void ata_dev_init(struct ata_device
*dev
)
6363 struct ata_link
*link
= dev
->link
;
6364 struct ata_port
*ap
= link
->ap
;
6365 unsigned long flags
;
6367 /* SATA spd limit is bound to the first device */
6368 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6371 /* High bits of dev->flags are used to record warm plug
6372 * requests which occur asynchronously. Synchronize using
6375 spin_lock_irqsave(ap
->lock
, flags
);
6376 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6378 spin_unlock_irqrestore(ap
->lock
, flags
);
6380 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6381 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6382 dev
->pio_mask
= UINT_MAX
;
6383 dev
->mwdma_mask
= UINT_MAX
;
6384 dev
->udma_mask
= UINT_MAX
;
6388 * ata_link_init - Initialize an ata_link structure
6389 * @ap: ATA port link is attached to
6390 * @link: Link structure to initialize
6391 * @pmp: Port multiplier port number
6396 * Kernel thread context (may sleep)
6398 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6402 /* clear everything except for devices */
6403 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6407 link
->active_tag
= ATA_TAG_POISON
;
6408 link
->hw_sata_spd_limit
= UINT_MAX
;
6410 /* can't use iterator, ap isn't initialized yet */
6411 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6412 struct ata_device
*dev
= &link
->device
[i
];
6415 dev
->devno
= dev
- link
->device
;
6421 * sata_link_init_spd - Initialize link->sata_spd_limit
6422 * @link: Link to configure sata_spd_limit for
6424 * Initialize @link->[hw_]sata_spd_limit to the currently
6428 * Kernel thread context (may sleep).
6431 * 0 on success, -errno on failure.
6433 int sata_link_init_spd(struct ata_link
*link
)
6438 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6442 spd
= (scontrol
>> 4) & 0xf;
6444 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6446 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6452 * ata_port_alloc - allocate and initialize basic ATA port resources
6453 * @host: ATA host this allocated port belongs to
6455 * Allocate and initialize basic ATA port resources.
6458 * Allocate ATA port on success, NULL on failure.
6461 * Inherited from calling layer (may sleep).
6463 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6465 struct ata_port
*ap
;
6469 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6473 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6474 ap
->lock
= &host
->lock
;
6475 ap
->flags
= ATA_FLAG_DISABLED
;
6477 ap
->ctl
= ATA_DEVCTL_OBS
;
6479 ap
->dev
= host
->dev
;
6480 ap
->last_ctl
= 0xFF;
6482 #if defined(ATA_VERBOSE_DEBUG)
6483 /* turn on all debugging levels */
6484 ap
->msg_enable
= 0x00FF;
6485 #elif defined(ATA_DEBUG)
6486 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6488 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6491 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6492 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6493 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6494 INIT_LIST_HEAD(&ap
->eh_done_q
);
6495 init_waitqueue_head(&ap
->eh_wait_q
);
6496 init_timer_deferrable(&ap
->fastdrain_timer
);
6497 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6498 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6500 ap
->cbl
= ATA_CBL_NONE
;
6502 ata_link_init(ap
, &ap
->link
, 0);
6505 ap
->stats
.unhandled_irq
= 1;
6506 ap
->stats
.idle_irq
= 1;
6511 static void ata_host_release(struct device
*gendev
, void *res
)
6513 struct ata_host
*host
= dev_get_drvdata(gendev
);
6516 for (i
= 0; i
< host
->n_ports
; i
++) {
6517 struct ata_port
*ap
= host
->ports
[i
];
6522 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6523 ap
->ops
->port_stop(ap
);
6526 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6527 host
->ops
->host_stop(host
);
6529 for (i
= 0; i
< host
->n_ports
; i
++) {
6530 struct ata_port
*ap
= host
->ports
[i
];
6536 scsi_host_put(ap
->scsi_host
);
6538 kfree(ap
->pmp_link
);
6540 host
->ports
[i
] = NULL
;
6543 dev_set_drvdata(gendev
, NULL
);
6547 * ata_host_alloc - allocate and init basic ATA host resources
6548 * @dev: generic device this host is associated with
6549 * @max_ports: maximum number of ATA ports associated with this host
6551 * Allocate and initialize basic ATA host resources. LLD calls
6552 * this function to allocate a host, initializes it fully and
6553 * attaches it using ata_host_register().
6555 * @max_ports ports are allocated and host->n_ports is
6556 * initialized to @max_ports. The caller is allowed to decrease
6557 * host->n_ports before calling ata_host_register(). The unused
6558 * ports will be automatically freed on registration.
6561 * Allocate ATA host on success, NULL on failure.
6564 * Inherited from calling layer (may sleep).
6566 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6568 struct ata_host
*host
;
6574 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6577 /* alloc a container for our list of ATA ports (buses) */
6578 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6579 /* alloc a container for our list of ATA ports (buses) */
6580 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6584 devres_add(dev
, host
);
6585 dev_set_drvdata(dev
, host
);
6587 spin_lock_init(&host
->lock
);
6589 host
->n_ports
= max_ports
;
6591 /* allocate ports bound to this host */
6592 for (i
= 0; i
< max_ports
; i
++) {
6593 struct ata_port
*ap
;
6595 ap
= ata_port_alloc(host
);
6600 host
->ports
[i
] = ap
;
6603 devres_remove_group(dev
, NULL
);
6607 devres_release_group(dev
, NULL
);
6612 * ata_host_alloc_pinfo - alloc host and init with port_info array
6613 * @dev: generic device this host is associated with
6614 * @ppi: array of ATA port_info to initialize host with
6615 * @n_ports: number of ATA ports attached to this host
6617 * Allocate ATA host and initialize with info from @ppi. If NULL
6618 * terminated, @ppi may contain fewer entries than @n_ports. The
6619 * last entry will be used for the remaining ports.
6622 * Allocate ATA host on success, NULL on failure.
6625 * Inherited from calling layer (may sleep).
6627 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6628 const struct ata_port_info
* const * ppi
,
6631 const struct ata_port_info
*pi
;
6632 struct ata_host
*host
;
6635 host
= ata_host_alloc(dev
, n_ports
);
6639 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6640 struct ata_port
*ap
= host
->ports
[i
];
6645 ap
->pio_mask
= pi
->pio_mask
;
6646 ap
->mwdma_mask
= pi
->mwdma_mask
;
6647 ap
->udma_mask
= pi
->udma_mask
;
6648 ap
->flags
|= pi
->flags
;
6649 ap
->link
.flags
|= pi
->link_flags
;
6650 ap
->ops
= pi
->port_ops
;
6652 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6653 host
->ops
= pi
->port_ops
;
6654 if (!host
->private_data
&& pi
->private_data
)
6655 host
->private_data
= pi
->private_data
;
6662 * ata_host_start - start and freeze ports of an ATA host
6663 * @host: ATA host to start ports for
6665 * Start and then freeze ports of @host. Started status is
6666 * recorded in host->flags, so this function can be called
6667 * multiple times. Ports are guaranteed to get started only
6668 * once. If host->ops isn't initialized yet, its set to the
6669 * first non-dummy port ops.
6672 * Inherited from calling layer (may sleep).
6675 * 0 if all ports are started successfully, -errno otherwise.
6677 int ata_host_start(struct ata_host
*host
)
6681 if (host
->flags
& ATA_HOST_STARTED
)
6684 for (i
= 0; i
< host
->n_ports
; i
++) {
6685 struct ata_port
*ap
= host
->ports
[i
];
6687 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6688 host
->ops
= ap
->ops
;
6690 if (ap
->ops
->port_start
) {
6691 rc
= ap
->ops
->port_start(ap
);
6693 ata_port_printk(ap
, KERN_ERR
, "failed to "
6694 "start port (errno=%d)\n", rc
);
6699 ata_eh_freeze_port(ap
);
6702 host
->flags
|= ATA_HOST_STARTED
;
6707 struct ata_port
*ap
= host
->ports
[i
];
6709 if (ap
->ops
->port_stop
)
6710 ap
->ops
->port_stop(ap
);
6716 * ata_sas_host_init - Initialize a host struct
6717 * @host: host to initialize
6718 * @dev: device host is attached to
6719 * @flags: host flags
6723 * PCI/etc. bus probe sem.
6726 /* KILLME - the only user left is ipr */
6727 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6728 unsigned long flags
, const struct ata_port_operations
*ops
)
6730 spin_lock_init(&host
->lock
);
6732 host
->flags
= flags
;
6737 * ata_host_register - register initialized ATA host
6738 * @host: ATA host to register
6739 * @sht: template for SCSI host
6741 * Register initialized ATA host. @host is allocated using
6742 * ata_host_alloc() and fully initialized by LLD. This function
6743 * starts ports, registers @host with ATA and SCSI layers and
6744 * probe registered devices.
6747 * Inherited from calling layer (may sleep).
6750 * 0 on success, -errno otherwise.
6752 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6756 /* host must have been started */
6757 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6758 dev_printk(KERN_ERR
, host
->dev
,
6759 "BUG: trying to register unstarted host\n");
6764 /* Blow away unused ports. This happens when LLD can't
6765 * determine the exact number of ports to allocate at
6768 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6769 kfree(host
->ports
[i
]);
6771 /* give ports names and add SCSI hosts */
6772 for (i
= 0; i
< host
->n_ports
; i
++)
6773 host
->ports
[i
]->print_id
= ata_print_id
++;
6775 rc
= ata_scsi_add_hosts(host
, sht
);
6779 /* associate with ACPI nodes */
6780 ata_acpi_associate(host
);
6782 /* set cable, sata_spd_limit and report */
6783 for (i
= 0; i
< host
->n_ports
; i
++) {
6784 struct ata_port
*ap
= host
->ports
[i
];
6785 unsigned long xfer_mask
;
6787 /* set SATA cable type if still unset */
6788 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6789 ap
->cbl
= ATA_CBL_SATA
;
6791 /* init sata_spd_limit to the current value */
6792 sata_link_init_spd(&ap
->link
);
6794 /* print per-port info to dmesg */
6795 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6798 if (!ata_port_is_dummy(ap
)) {
6799 ata_port_printk(ap
, KERN_INFO
,
6800 "%cATA max %s %s\n",
6801 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6802 ata_mode_string(xfer_mask
),
6803 ap
->link
.eh_info
.desc
);
6804 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6806 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6809 /* perform each probe synchronously */
6810 DPRINTK("probe begin\n");
6811 for (i
= 0; i
< host
->n_ports
; i
++) {
6812 struct ata_port
*ap
= host
->ports
[i
];
6816 if (ap
->ops
->error_handler
) {
6817 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6818 unsigned long flags
;
6822 /* kick EH for boot probing */
6823 spin_lock_irqsave(ap
->lock
, flags
);
6826 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6827 ehi
->action
|= ATA_EH_SOFTRESET
;
6828 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6830 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6831 ap
->pflags
|= ATA_PFLAG_LOADING
;
6832 ata_port_schedule_eh(ap
);
6834 spin_unlock_irqrestore(ap
->lock
, flags
);
6836 /* wait for EH to finish */
6837 ata_port_wait_eh(ap
);
6839 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6840 rc
= ata_bus_probe(ap
);
6841 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6844 /* FIXME: do something useful here?
6845 * Current libata behavior will
6846 * tear down everything when
6847 * the module is removed
6848 * or the h/w is unplugged.
6854 /* probes are done, now scan each port's disk(s) */
6855 DPRINTK("host probe begin\n");
6856 for (i
= 0; i
< host
->n_ports
; i
++) {
6857 struct ata_port
*ap
= host
->ports
[i
];
6859 ata_scsi_scan_host(ap
, 1);
6866 * ata_host_activate - start host, request IRQ and register it
6867 * @host: target ATA host
6868 * @irq: IRQ to request
6869 * @irq_handler: irq_handler used when requesting IRQ
6870 * @irq_flags: irq_flags used when requesting IRQ
6871 * @sht: scsi_host_template to use when registering the host
6873 * After allocating an ATA host and initializing it, most libata
6874 * LLDs perform three steps to activate the host - start host,
6875 * request IRQ and register it. This helper takes necessasry
6876 * arguments and performs the three steps in one go.
6879 * Inherited from calling layer (may sleep).
6882 * 0 on success, -errno otherwise.
6884 int ata_host_activate(struct ata_host
*host
, int irq
,
6885 irq_handler_t irq_handler
, unsigned long irq_flags
,
6886 struct scsi_host_template
*sht
)
6890 rc
= ata_host_start(host
);
6894 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6895 dev_driver_string(host
->dev
), host
);
6899 for (i
= 0; i
< host
->n_ports
; i
++)
6900 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6902 rc
= ata_host_register(host
, sht
);
6903 /* if failed, just free the IRQ and leave ports alone */
6905 devm_free_irq(host
->dev
, irq
, host
);
6911 * ata_port_detach - Detach ATA port in prepration of device removal
6912 * @ap: ATA port to be detached
6914 * Detach all ATA devices and the associated SCSI devices of @ap;
6915 * then, remove the associated SCSI host. @ap is guaranteed to
6916 * be quiescent on return from this function.
6919 * Kernel thread context (may sleep).
6921 void ata_port_detach(struct ata_port
*ap
)
6923 unsigned long flags
;
6924 struct ata_link
*link
;
6925 struct ata_device
*dev
;
6927 if (!ap
->ops
->error_handler
)
6930 /* tell EH we're leaving & flush EH */
6931 spin_lock_irqsave(ap
->lock
, flags
);
6932 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6933 spin_unlock_irqrestore(ap
->lock
, flags
);
6935 ata_port_wait_eh(ap
);
6937 /* EH is now guaranteed to see UNLOADING, so no new device
6938 * will be attached. Disable all existing devices.
6940 spin_lock_irqsave(ap
->lock
, flags
);
6942 ata_port_for_each_link(link
, ap
) {
6943 ata_link_for_each_dev(dev
, link
)
6944 ata_dev_disable(dev
);
6947 spin_unlock_irqrestore(ap
->lock
, flags
);
6949 /* Final freeze & EH. All in-flight commands are aborted. EH
6950 * will be skipped and retrials will be terminated with bad
6953 spin_lock_irqsave(ap
->lock
, flags
);
6954 ata_port_freeze(ap
); /* won't be thawed */
6955 spin_unlock_irqrestore(ap
->lock
, flags
);
6957 ata_port_wait_eh(ap
);
6958 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6961 /* remove the associated SCSI host */
6962 scsi_remove_host(ap
->scsi_host
);
6966 * ata_host_detach - Detach all ports of an ATA host
6967 * @host: Host to detach
6969 * Detach all ports of @host.
6972 * Kernel thread context (may sleep).
6974 void ata_host_detach(struct ata_host
*host
)
6978 for (i
= 0; i
< host
->n_ports
; i
++)
6979 ata_port_detach(host
->ports
[i
]);
6983 * ata_std_ports - initialize ioaddr with standard port offsets.
6984 * @ioaddr: IO address structure to be initialized
6986 * Utility function which initializes data_addr, error_addr,
6987 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6988 * device_addr, status_addr, and command_addr to standard offsets
6989 * relative to cmd_addr.
6991 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6994 void ata_std_ports(struct ata_ioports
*ioaddr
)
6996 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6997 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6998 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6999 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7000 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7001 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7002 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7003 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7004 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7005 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7012 * ata_pci_remove_one - PCI layer callback for device removal
7013 * @pdev: PCI device that was removed
7015 * PCI layer indicates to libata via this hook that hot-unplug or
7016 * module unload event has occurred. Detach all ports. Resource
7017 * release is handled via devres.
7020 * Inherited from PCI layer (may sleep).
7022 void ata_pci_remove_one(struct pci_dev
*pdev
)
7024 struct device
*dev
= &pdev
->dev
;
7025 struct ata_host
*host
= dev_get_drvdata(dev
);
7027 ata_host_detach(host
);
7030 /* move to PCI subsystem */
7031 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7033 unsigned long tmp
= 0;
7035 switch (bits
->width
) {
7038 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7044 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7050 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7061 return (tmp
== bits
->val
) ? 1 : 0;
7065 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7067 pci_save_state(pdev
);
7068 pci_disable_device(pdev
);
7070 if (mesg
.event
== PM_EVENT_SUSPEND
)
7071 pci_set_power_state(pdev
, PCI_D3hot
);
7074 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7078 pci_set_power_state(pdev
, PCI_D0
);
7079 pci_restore_state(pdev
);
7081 rc
= pcim_enable_device(pdev
);
7083 dev_printk(KERN_ERR
, &pdev
->dev
,
7084 "failed to enable device after resume (%d)\n", rc
);
7088 pci_set_master(pdev
);
7092 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7094 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7097 rc
= ata_host_suspend(host
, mesg
);
7101 ata_pci_device_do_suspend(pdev
, mesg
);
7106 int ata_pci_device_resume(struct pci_dev
*pdev
)
7108 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7111 rc
= ata_pci_device_do_resume(pdev
);
7113 ata_host_resume(host
);
7116 #endif /* CONFIG_PM */
7118 #endif /* CONFIG_PCI */
7121 static int __init
ata_init(void)
7123 ata_probe_timeout
*= HZ
;
7124 ata_wq
= create_workqueue("ata");
7128 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7130 destroy_workqueue(ata_wq
);
7134 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7138 static void __exit
ata_exit(void)
7140 destroy_workqueue(ata_wq
);
7141 destroy_workqueue(ata_aux_wq
);
7144 subsys_initcall(ata_init
);
7145 module_exit(ata_exit
);
7147 static unsigned long ratelimit_time
;
7148 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7150 int ata_ratelimit(void)
7153 unsigned long flags
;
7155 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7157 if (time_after(jiffies
, ratelimit_time
)) {
7159 ratelimit_time
= jiffies
+ (HZ
/5);
7163 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7169 * ata_wait_register - wait until register value changes
7170 * @reg: IO-mapped register
7171 * @mask: Mask to apply to read register value
7172 * @val: Wait condition
7173 * @interval_msec: polling interval in milliseconds
7174 * @timeout_msec: timeout in milliseconds
7176 * Waiting for some bits of register to change is a common
7177 * operation for ATA controllers. This function reads 32bit LE
7178 * IO-mapped register @reg and tests for the following condition.
7180 * (*@reg & mask) != val
7182 * If the condition is met, it returns; otherwise, the process is
7183 * repeated after @interval_msec until timeout.
7186 * Kernel thread context (may sleep)
7189 * The final register value.
7191 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7192 unsigned long interval_msec
,
7193 unsigned long timeout_msec
)
7195 unsigned long timeout
;
7198 tmp
= ioread32(reg
);
7200 /* Calculate timeout _after_ the first read to make sure
7201 * preceding writes reach the controller before starting to
7202 * eat away the timeout.
7204 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7206 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7207 msleep(interval_msec
);
7208 tmp
= ioread32(reg
);
7217 static void ata_dummy_noret(struct ata_port
*ap
) { }
7218 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7219 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7221 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7226 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7228 return AC_ERR_SYSTEM
;
7231 const struct ata_port_operations ata_dummy_port_ops
= {
7232 .check_status
= ata_dummy_check_status
,
7233 .check_altstatus
= ata_dummy_check_status
,
7234 .dev_select
= ata_noop_dev_select
,
7235 .qc_prep
= ata_noop_qc_prep
,
7236 .qc_issue
= ata_dummy_qc_issue
,
7237 .freeze
= ata_dummy_noret
,
7238 .thaw
= ata_dummy_noret
,
7239 .error_handler
= ata_dummy_noret
,
7240 .post_internal_cmd
= ata_dummy_qc_noret
,
7241 .irq_clear
= ata_dummy_noret
,
7242 .port_start
= ata_dummy_ret0
,
7243 .port_stop
= ata_dummy_noret
,
7246 const struct ata_port_info ata_dummy_port_info
= {
7247 .port_ops
= &ata_dummy_port_ops
,
7251 * libata is essentially a library of internal helper functions for
7252 * low-level ATA host controller drivers. As such, the API/ABI is
7253 * likely to change as new drivers are added and updated.
7254 * Do not depend on ABI/API stability.
7257 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7258 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7259 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7260 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7261 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7262 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7263 EXPORT_SYMBOL_GPL(ata_std_ports
);
7264 EXPORT_SYMBOL_GPL(ata_host_init
);
7265 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7266 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7267 EXPORT_SYMBOL_GPL(ata_host_start
);
7268 EXPORT_SYMBOL_GPL(ata_host_register
);
7269 EXPORT_SYMBOL_GPL(ata_host_activate
);
7270 EXPORT_SYMBOL_GPL(ata_host_detach
);
7271 EXPORT_SYMBOL_GPL(ata_sg_init
);
7272 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7273 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7274 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7275 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7276 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7277 EXPORT_SYMBOL_GPL(ata_tf_load
);
7278 EXPORT_SYMBOL_GPL(ata_tf_read
);
7279 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7280 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7281 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7282 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7283 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7284 EXPORT_SYMBOL_GPL(ata_check_status
);
7285 EXPORT_SYMBOL_GPL(ata_altstatus
);
7286 EXPORT_SYMBOL_GPL(ata_exec_command
);
7287 EXPORT_SYMBOL_GPL(ata_port_start
);
7288 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7289 EXPORT_SYMBOL_GPL(ata_interrupt
);
7290 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7291 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7292 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7293 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7294 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7295 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7296 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7297 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7298 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7299 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7300 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7301 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7302 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7303 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7304 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7305 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7306 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7307 EXPORT_SYMBOL_GPL(ata_port_probe
);
7308 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7309 EXPORT_SYMBOL_GPL(sata_set_spd
);
7310 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7311 EXPORT_SYMBOL_GPL(sata_link_resume
);
7312 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7313 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7314 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7315 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7316 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7317 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7318 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7319 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7320 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7321 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7322 EXPORT_SYMBOL_GPL(ata_port_disable
);
7323 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7324 EXPORT_SYMBOL_GPL(ata_wait_register
);
7325 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7326 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7327 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7328 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7329 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7330 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7331 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7332 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7333 EXPORT_SYMBOL_GPL(ata_host_intr
);
7334 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7335 EXPORT_SYMBOL_GPL(sata_scr_read
);
7336 EXPORT_SYMBOL_GPL(sata_scr_write
);
7337 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7338 EXPORT_SYMBOL_GPL(ata_link_online
);
7339 EXPORT_SYMBOL_GPL(ata_link_offline
);
7341 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7342 EXPORT_SYMBOL_GPL(ata_host_resume
);
7343 #endif /* CONFIG_PM */
7344 EXPORT_SYMBOL_GPL(ata_id_string
);
7345 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7346 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7347 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7349 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7350 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7351 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7354 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7355 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7356 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7357 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7358 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7359 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7361 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7362 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7363 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7364 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7365 #endif /* CONFIG_PM */
7366 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7367 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7368 #endif /* CONFIG_PCI */
7370 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7371 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7372 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7373 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7374 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7376 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7377 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7378 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7379 EXPORT_SYMBOL_GPL(ata_port_desc
);
7381 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7382 #endif /* CONFIG_PCI */
7383 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7384 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7385 EXPORT_SYMBOL_GPL(ata_link_abort
);
7386 EXPORT_SYMBOL_GPL(ata_port_abort
);
7387 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7388 EXPORT_SYMBOL_GPL(sata_async_notification
);
7389 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7390 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7391 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7392 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7393 EXPORT_SYMBOL_GPL(ata_do_eh
);
7394 EXPORT_SYMBOL_GPL(ata_irq_on
);
7395 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7397 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7398 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7399 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7400 EXPORT_SYMBOL_GPL(ata_cable_sata
);