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>
53 #include <scsi/scsi.h>
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsi_host.h>
56 #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_feature(struct ata_device
*dev
,
72 u8 enable
, u8 feature
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
74 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
76 unsigned int ata_print_id
= 1;
77 static struct workqueue_struct
*ata_wq
;
79 struct workqueue_struct
*ata_aux_wq
;
81 int atapi_enabled
= 1;
82 module_param(atapi_enabled
, int, 0444);
83 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
86 module_param(atapi_dmadir
, int, 0444);
87 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 int atapi_passthru16
= 1;
90 module_param(atapi_passthru16
, int, 0444);
91 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
94 module_param_named(fua
, libata_fua
, int, 0444);
95 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
97 static int ata_ignore_hpa
;
98 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
99 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
101 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
102 module_param_named(dma
, libata_dma_mask
, int, 0444);
103 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
105 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
106 module_param(ata_probe_timeout
, int, 0444);
107 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
109 int libata_noacpi
= 0;
110 module_param_named(noacpi
, libata_noacpi
, int, 0444);
111 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
113 MODULE_AUTHOR("Jeff Garzik");
114 MODULE_DESCRIPTION("Library module for ATA devices");
115 MODULE_LICENSE("GPL");
116 MODULE_VERSION(DRV_VERSION
);
120 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
121 * @tf: Taskfile to convert
122 * @pmp: Port multiplier port
123 * @is_cmd: This FIS is for command
124 * @fis: Buffer into which data will output
126 * Converts a standard ATA taskfile to a Serial ATA
127 * FIS structure (Register - Host to Device).
130 * Inherited from caller.
132 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
134 fis
[0] = 0x27; /* Register - Host to Device FIS */
135 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
137 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
139 fis
[2] = tf
->command
;
140 fis
[3] = tf
->feature
;
147 fis
[8] = tf
->hob_lbal
;
148 fis
[9] = tf
->hob_lbam
;
149 fis
[10] = tf
->hob_lbah
;
150 fis
[11] = tf
->hob_feature
;
153 fis
[13] = tf
->hob_nsect
;
164 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
165 * @fis: Buffer from which data will be input
166 * @tf: Taskfile to output
168 * Converts a serial ATA FIS structure to a standard ATA taskfile.
171 * Inherited from caller.
174 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
176 tf
->command
= fis
[2]; /* status */
177 tf
->feature
= fis
[3]; /* error */
184 tf
->hob_lbal
= fis
[8];
185 tf
->hob_lbam
= fis
[9];
186 tf
->hob_lbah
= fis
[10];
189 tf
->hob_nsect
= fis
[13];
192 static const u8 ata_rw_cmds
[] = {
196 ATA_CMD_READ_MULTI_EXT
,
197 ATA_CMD_WRITE_MULTI_EXT
,
201 ATA_CMD_WRITE_MULTI_FUA_EXT
,
205 ATA_CMD_PIO_READ_EXT
,
206 ATA_CMD_PIO_WRITE_EXT
,
219 ATA_CMD_WRITE_FUA_EXT
223 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
224 * @tf: command to examine and configure
225 * @dev: device tf belongs to
227 * Examine the device configuration and tf->flags to calculate
228 * the proper read/write commands and protocol to use.
233 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
237 int index
, fua
, lba48
, write
;
239 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
240 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
241 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
243 if (dev
->flags
& ATA_DFLAG_PIO
) {
244 tf
->protocol
= ATA_PROT_PIO
;
245 index
= dev
->multi_count
? 0 : 8;
246 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
247 /* Unable to use DMA due to host limitation */
248 tf
->protocol
= ATA_PROT_PIO
;
249 index
= dev
->multi_count
? 0 : 8;
251 tf
->protocol
= ATA_PROT_DMA
;
255 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
264 * ata_tf_read_block - Read block address from ATA taskfile
265 * @tf: ATA taskfile of interest
266 * @dev: ATA device @tf belongs to
271 * Read block address from @tf. This function can handle all
272 * three address formats - LBA, LBA48 and CHS. tf->protocol and
273 * flags select the address format to use.
276 * Block address read from @tf.
278 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
282 if (tf
->flags
& ATA_TFLAG_LBA
) {
283 if (tf
->flags
& ATA_TFLAG_LBA48
) {
284 block
|= (u64
)tf
->hob_lbah
<< 40;
285 block
|= (u64
)tf
->hob_lbam
<< 32;
286 block
|= tf
->hob_lbal
<< 24;
288 block
|= (tf
->device
& 0xf) << 24;
290 block
|= tf
->lbah
<< 16;
291 block
|= tf
->lbam
<< 8;
296 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
297 head
= tf
->device
& 0xf;
300 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
307 * ata_build_rw_tf - Build ATA taskfile for given read/write request
308 * @tf: Target ATA taskfile
309 * @dev: ATA device @tf belongs to
310 * @block: Block address
311 * @n_block: Number of blocks
312 * @tf_flags: RW/FUA etc...
318 * Build ATA taskfile @tf for read/write request described by
319 * @block, @n_block, @tf_flags and @tag on @dev.
323 * 0 on success, -ERANGE if the request is too large for @dev,
324 * -EINVAL if the request is invalid.
326 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
327 u64 block
, u32 n_block
, unsigned int tf_flags
,
330 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
331 tf
->flags
|= tf_flags
;
333 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
335 if (!lba_48_ok(block
, n_block
))
338 tf
->protocol
= ATA_PROT_NCQ
;
339 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
341 if (tf
->flags
& ATA_TFLAG_WRITE
)
342 tf
->command
= ATA_CMD_FPDMA_WRITE
;
344 tf
->command
= ATA_CMD_FPDMA_READ
;
346 tf
->nsect
= tag
<< 3;
347 tf
->hob_feature
= (n_block
>> 8) & 0xff;
348 tf
->feature
= n_block
& 0xff;
350 tf
->hob_lbah
= (block
>> 40) & 0xff;
351 tf
->hob_lbam
= (block
>> 32) & 0xff;
352 tf
->hob_lbal
= (block
>> 24) & 0xff;
353 tf
->lbah
= (block
>> 16) & 0xff;
354 tf
->lbam
= (block
>> 8) & 0xff;
355 tf
->lbal
= block
& 0xff;
358 if (tf
->flags
& ATA_TFLAG_FUA
)
359 tf
->device
|= 1 << 7;
360 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
361 tf
->flags
|= ATA_TFLAG_LBA
;
363 if (lba_28_ok(block
, n_block
)) {
365 tf
->device
|= (block
>> 24) & 0xf;
366 } else if (lba_48_ok(block
, n_block
)) {
367 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
371 tf
->flags
|= ATA_TFLAG_LBA48
;
373 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
375 tf
->hob_lbah
= (block
>> 40) & 0xff;
376 tf
->hob_lbam
= (block
>> 32) & 0xff;
377 tf
->hob_lbal
= (block
>> 24) & 0xff;
379 /* request too large even for LBA48 */
382 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
385 tf
->nsect
= n_block
& 0xff;
387 tf
->lbah
= (block
>> 16) & 0xff;
388 tf
->lbam
= (block
>> 8) & 0xff;
389 tf
->lbal
= block
& 0xff;
391 tf
->device
|= ATA_LBA
;
394 u32 sect
, head
, cyl
, track
;
396 /* The request -may- be too large for CHS addressing. */
397 if (!lba_28_ok(block
, n_block
))
400 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
403 /* Convert LBA to CHS */
404 track
= (u32
)block
/ dev
->sectors
;
405 cyl
= track
/ dev
->heads
;
406 head
= track
% dev
->heads
;
407 sect
= (u32
)block
% dev
->sectors
+ 1;
409 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
410 (u32
)block
, track
, cyl
, head
, sect
);
412 /* Check whether the converted CHS can fit.
416 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
419 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
430 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
431 * @pio_mask: pio_mask
432 * @mwdma_mask: mwdma_mask
433 * @udma_mask: udma_mask
435 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
436 * unsigned int xfer_mask.
444 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
445 unsigned int mwdma_mask
,
446 unsigned int udma_mask
)
448 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
449 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
450 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
454 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
455 * @xfer_mask: xfer_mask to unpack
456 * @pio_mask: resulting pio_mask
457 * @mwdma_mask: resulting mwdma_mask
458 * @udma_mask: resulting udma_mask
460 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
461 * Any NULL distination masks will be ignored.
463 static void ata_unpack_xfermask(unsigned int xfer_mask
,
464 unsigned int *pio_mask
,
465 unsigned int *mwdma_mask
,
466 unsigned int *udma_mask
)
469 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
471 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
473 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
476 static const struct ata_xfer_ent
{
480 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
481 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
482 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
487 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
488 * @xfer_mask: xfer_mask of interest
490 * Return matching XFER_* value for @xfer_mask. Only the highest
491 * bit of @xfer_mask is considered.
497 * Matching XFER_* value, 0 if no match found.
499 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
501 int highbit
= fls(xfer_mask
) - 1;
502 const struct ata_xfer_ent
*ent
;
504 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
505 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
506 return ent
->base
+ highbit
- ent
->shift
;
511 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
512 * @xfer_mode: XFER_* of interest
514 * Return matching xfer_mask for @xfer_mode.
520 * Matching xfer_mask, 0 if no match found.
522 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
524 const struct ata_xfer_ent
*ent
;
526 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
527 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
528 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
533 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
534 * @xfer_mode: XFER_* of interest
536 * Return matching xfer_shift for @xfer_mode.
542 * Matching xfer_shift, -1 if no match found.
544 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
546 const struct ata_xfer_ent
*ent
;
548 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
549 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
555 * ata_mode_string - convert xfer_mask to string
556 * @xfer_mask: mask of bits supported; only highest bit counts.
558 * Determine string which represents the highest speed
559 * (highest bit in @modemask).
565 * Constant C string representing highest speed listed in
566 * @mode_mask, or the constant C string "<n/a>".
568 static const char *ata_mode_string(unsigned int xfer_mask
)
570 static const char * const xfer_mode_str
[] = {
594 highbit
= fls(xfer_mask
) - 1;
595 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
596 return xfer_mode_str
[highbit
];
600 static const char *sata_spd_string(unsigned int spd
)
602 static const char * const spd_str
[] = {
607 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
609 return spd_str
[spd
- 1];
612 void ata_dev_disable(struct ata_device
*dev
)
614 if (ata_dev_enabled(dev
)) {
615 if (ata_msg_drv(dev
->link
->ap
))
616 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
617 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
624 * ata_devchk - PATA device presence detection
625 * @ap: ATA channel to examine
626 * @device: Device to examine (starting at zero)
628 * This technique was originally described in
629 * Hale Landis's ATADRVR (www.ata-atapi.com), and
630 * later found its way into the ATA/ATAPI spec.
632 * Write a pattern to the ATA shadow registers,
633 * and if a device is present, it will respond by
634 * correctly storing and echoing back the
635 * ATA shadow register contents.
641 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
643 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
646 ap
->ops
->dev_select(ap
, device
);
648 iowrite8(0x55, ioaddr
->nsect_addr
);
649 iowrite8(0xaa, ioaddr
->lbal_addr
);
651 iowrite8(0xaa, ioaddr
->nsect_addr
);
652 iowrite8(0x55, ioaddr
->lbal_addr
);
654 iowrite8(0x55, ioaddr
->nsect_addr
);
655 iowrite8(0xaa, ioaddr
->lbal_addr
);
657 nsect
= ioread8(ioaddr
->nsect_addr
);
658 lbal
= ioread8(ioaddr
->lbal_addr
);
660 if ((nsect
== 0x55) && (lbal
== 0xaa))
661 return 1; /* we found a device */
663 return 0; /* nothing found */
667 * ata_dev_classify - determine device type based on ATA-spec signature
668 * @tf: ATA taskfile register set for device to be identified
670 * Determine from taskfile register contents whether a device is
671 * ATA or ATAPI, as per "Signature and persistence" section
672 * of ATA/PI spec (volume 1, sect 5.14).
678 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
679 * %ATA_DEV_UNKNOWN the event of failure.
681 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
683 /* Apple's open source Darwin code hints that some devices only
684 * put a proper signature into the LBA mid/high registers,
685 * So, we only check those. It's sufficient for uniqueness.
687 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
688 * signatures for ATA and ATAPI devices attached on SerialATA,
689 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
690 * spec has never mentioned about using different signatures
691 * for ATA/ATAPI devices. Then, Serial ATA II: Port
692 * Multiplier specification began to use 0x69/0x96 to identify
693 * port multpliers and 0x3c/0xc3 to identify SEMB device.
694 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
695 * 0x69/0x96 shortly and described them as reserved for
698 * We follow the current spec and consider that 0x69/0x96
699 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
701 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
702 DPRINTK("found ATA device by sig\n");
706 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
707 DPRINTK("found ATAPI device by sig\n");
708 return ATA_DEV_ATAPI
;
711 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
712 DPRINTK("found PMP device by sig\n");
716 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
717 printk(KERN_INFO
"ata: SEMB device ignored\n");
718 return ATA_DEV_SEMB_UNSUP
; /* not yet */
721 DPRINTK("unknown device\n");
722 return ATA_DEV_UNKNOWN
;
726 * ata_dev_try_classify - Parse returned ATA device signature
727 * @dev: ATA device to classify (starting at zero)
728 * @present: device seems present
729 * @r_err: Value of error register on completion
731 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
732 * an ATA/ATAPI-defined set of values is placed in the ATA
733 * shadow registers, indicating the results of device detection
736 * Select the ATA device, and read the values from the ATA shadow
737 * registers. Then parse according to the Error register value,
738 * and the spec-defined values examined by ata_dev_classify().
744 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
746 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
749 struct ata_port
*ap
= dev
->link
->ap
;
750 struct ata_taskfile tf
;
754 ap
->ops
->dev_select(ap
, dev
->devno
);
756 memset(&tf
, 0, sizeof(tf
));
758 ap
->ops
->tf_read(ap
, &tf
);
763 /* see if device passed diags: if master then continue and warn later */
764 if (err
== 0 && dev
->devno
== 0)
765 /* diagnostic fail : do nothing _YET_ */
766 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
769 else if ((dev
->devno
== 0) && (err
== 0x81))
774 /* determine if device is ATA or ATAPI */
775 class = ata_dev_classify(&tf
);
777 if (class == ATA_DEV_UNKNOWN
) {
778 /* If the device failed diagnostic, it's likely to
779 * have reported incorrect device signature too.
780 * Assume ATA device if the device seems present but
781 * device signature is invalid with diagnostic
784 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
787 class = ATA_DEV_NONE
;
788 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
789 class = ATA_DEV_NONE
;
795 * ata_id_string - Convert IDENTIFY DEVICE page into string
796 * @id: IDENTIFY DEVICE results we will examine
797 * @s: string into which data is output
798 * @ofs: offset into identify device page
799 * @len: length of string to return. must be an even number.
801 * The strings in the IDENTIFY DEVICE page are broken up into
802 * 16-bit chunks. Run through the string, and output each
803 * 8-bit chunk linearly, regardless of platform.
809 void ata_id_string(const u16
*id
, unsigned char *s
,
810 unsigned int ofs
, unsigned int len
)
829 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
830 * @id: IDENTIFY DEVICE results we will examine
831 * @s: string into which data is output
832 * @ofs: offset into identify device page
833 * @len: length of string to return. must be an odd number.
835 * This function is identical to ata_id_string except that it
836 * trims trailing spaces and terminates the resulting string with
837 * null. @len must be actual maximum length (even number) + 1.
842 void ata_id_c_string(const u16
*id
, unsigned char *s
,
843 unsigned int ofs
, unsigned int len
)
849 ata_id_string(id
, s
, ofs
, len
- 1);
851 p
= s
+ strnlen(s
, len
- 1);
852 while (p
> s
&& p
[-1] == ' ')
857 static u64
ata_id_n_sectors(const u16
*id
)
859 if (ata_id_has_lba(id
)) {
860 if (ata_id_has_lba48(id
))
861 return ata_id_u64(id
, 100);
863 return ata_id_u32(id
, 60);
865 if (ata_id_current_chs_valid(id
))
866 return ata_id_u32(id
, 57);
868 return id
[1] * id
[3] * id
[6];
872 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
876 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
877 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
878 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
879 sectors
|= (tf
->lbah
& 0xff) << 16;
880 sectors
|= (tf
->lbam
& 0xff) << 8;
881 sectors
|= (tf
->lbal
& 0xff);
886 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
890 sectors
|= (tf
->device
& 0x0f) << 24;
891 sectors
|= (tf
->lbah
& 0xff) << 16;
892 sectors
|= (tf
->lbam
& 0xff) << 8;
893 sectors
|= (tf
->lbal
& 0xff);
899 * ata_read_native_max_address - Read native max address
900 * @dev: target device
901 * @max_sectors: out parameter for the result native max address
903 * Perform an LBA48 or LBA28 native size query upon the device in
907 * 0 on success, -EACCES if command is aborted by the drive.
908 * -EIO on other errors.
910 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
912 unsigned int err_mask
;
913 struct ata_taskfile tf
;
914 int lba48
= ata_id_has_lba48(dev
->id
);
916 ata_tf_init(dev
, &tf
);
918 /* always clear all address registers */
919 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
922 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
923 tf
.flags
|= ATA_TFLAG_LBA48
;
925 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
927 tf
.protocol
|= ATA_PROT_NODATA
;
928 tf
.device
|= ATA_LBA
;
930 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
932 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
933 "max address (err_mask=0x%x)\n", err_mask
);
934 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
940 *max_sectors
= ata_tf_to_lba48(&tf
);
942 *max_sectors
= ata_tf_to_lba(&tf
);
943 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
949 * ata_set_max_sectors - Set max sectors
950 * @dev: target device
951 * @new_sectors: new max sectors value to set for the device
953 * Set max sectors of @dev to @new_sectors.
956 * 0 on success, -EACCES if command is aborted or denied (due to
957 * previous non-volatile SET_MAX) by the drive. -EIO on other
960 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
962 unsigned int err_mask
;
963 struct ata_taskfile tf
;
964 int lba48
= ata_id_has_lba48(dev
->id
);
968 ata_tf_init(dev
, &tf
);
970 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
973 tf
.command
= ATA_CMD_SET_MAX_EXT
;
974 tf
.flags
|= ATA_TFLAG_LBA48
;
976 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
977 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
978 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
980 tf
.command
= ATA_CMD_SET_MAX
;
982 tf
.device
|= (new_sectors
>> 24) & 0xf;
985 tf
.protocol
|= ATA_PROT_NODATA
;
986 tf
.device
|= ATA_LBA
;
988 tf
.lbal
= (new_sectors
>> 0) & 0xff;
989 tf
.lbam
= (new_sectors
>> 8) & 0xff;
990 tf
.lbah
= (new_sectors
>> 16) & 0xff;
992 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
994 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
995 "max address (err_mask=0x%x)\n", err_mask
);
996 if (err_mask
== AC_ERR_DEV
&&
997 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1006 * ata_hpa_resize - Resize a device with an HPA set
1007 * @dev: Device to resize
1009 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1010 * it if required to the full size of the media. The caller must check
1011 * the drive has the HPA feature set enabled.
1014 * 0 on success, -errno on failure.
1016 static int ata_hpa_resize(struct ata_device
*dev
)
1018 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1019 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1020 u64 sectors
= ata_id_n_sectors(dev
->id
);
1024 /* do we need to do it? */
1025 if (dev
->class != ATA_DEV_ATA
||
1026 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1027 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1030 /* read native max address */
1031 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1033 /* If HPA isn't going to be unlocked, skip HPA
1034 * resizing from the next try.
1036 if (!ata_ignore_hpa
) {
1037 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1038 "broken, will skip HPA handling\n");
1039 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1041 /* we can continue if device aborted the command */
1049 /* nothing to do? */
1050 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1051 if (!print_info
|| native_sectors
== sectors
)
1054 if (native_sectors
> sectors
)
1055 ata_dev_printk(dev
, KERN_INFO
,
1056 "HPA detected: current %llu, native %llu\n",
1057 (unsigned long long)sectors
,
1058 (unsigned long long)native_sectors
);
1059 else if (native_sectors
< sectors
)
1060 ata_dev_printk(dev
, KERN_WARNING
,
1061 "native sectors (%llu) is smaller than "
1063 (unsigned long long)native_sectors
,
1064 (unsigned long long)sectors
);
1068 /* let's unlock HPA */
1069 rc
= ata_set_max_sectors(dev
, native_sectors
);
1070 if (rc
== -EACCES
) {
1071 /* if device aborted the command, skip HPA resizing */
1072 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1073 "(%llu -> %llu), skipping HPA handling\n",
1074 (unsigned long long)sectors
,
1075 (unsigned long long)native_sectors
);
1076 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1081 /* re-read IDENTIFY data */
1082 rc
= ata_dev_reread_id(dev
, 0);
1084 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1085 "data after HPA resizing\n");
1090 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1091 ata_dev_printk(dev
, KERN_INFO
,
1092 "HPA unlocked: %llu -> %llu, native %llu\n",
1093 (unsigned long long)sectors
,
1094 (unsigned long long)new_sectors
,
1095 (unsigned long long)native_sectors
);
1102 * ata_id_to_dma_mode - Identify DMA mode from id block
1103 * @dev: device to identify
1104 * @unknown: mode to assume if we cannot tell
1106 * Set up the timing values for the device based upon the identify
1107 * reported values for the DMA mode. This function is used by drivers
1108 * which rely upon firmware configured modes, but wish to report the
1109 * mode correctly when possible.
1111 * In addition we emit similarly formatted messages to the default
1112 * ata_dev_set_mode handler, in order to provide consistency of
1116 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1121 /* Pack the DMA modes */
1122 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1123 if (dev
->id
[53] & 0x04)
1124 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1126 /* Select the mode in use */
1127 mode
= ata_xfer_mask2mode(mask
);
1130 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1131 ata_mode_string(mask
));
1133 /* SWDMA perhaps ? */
1135 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1138 /* Configure the device reporting */
1139 dev
->xfer_mode
= mode
;
1140 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1144 * ata_noop_dev_select - Select device 0/1 on ATA bus
1145 * @ap: ATA channel to manipulate
1146 * @device: ATA device (numbered from zero) to select
1148 * This function performs no actual function.
1150 * May be used as the dev_select() entry in ata_port_operations.
1155 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1161 * ata_std_dev_select - Select device 0/1 on ATA bus
1162 * @ap: ATA channel to manipulate
1163 * @device: ATA device (numbered from zero) to select
1165 * Use the method defined in the ATA specification to
1166 * make either device 0, or device 1, active on the
1167 * ATA channel. Works with both PIO and MMIO.
1169 * May be used as the dev_select() entry in ata_port_operations.
1175 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1180 tmp
= ATA_DEVICE_OBS
;
1182 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1184 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1185 ata_pause(ap
); /* needed; also flushes, for mmio */
1189 * ata_dev_select - Select device 0/1 on ATA bus
1190 * @ap: ATA channel to manipulate
1191 * @device: ATA device (numbered from zero) to select
1192 * @wait: non-zero to wait for Status register BSY bit to clear
1193 * @can_sleep: non-zero if context allows sleeping
1195 * Use the method defined in the ATA specification to
1196 * make either device 0, or device 1, active on the
1199 * This is a high-level version of ata_std_dev_select(),
1200 * which additionally provides the services of inserting
1201 * the proper pauses and status polling, where needed.
1207 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1208 unsigned int wait
, unsigned int can_sleep
)
1210 if (ata_msg_probe(ap
))
1211 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1212 "device %u, wait %u\n", device
, wait
);
1217 ap
->ops
->dev_select(ap
, device
);
1220 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1227 * ata_dump_id - IDENTIFY DEVICE info debugging output
1228 * @id: IDENTIFY DEVICE page to dump
1230 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1237 static inline void ata_dump_id(const u16
*id
)
1239 DPRINTK("49==0x%04x "
1249 DPRINTK("80==0x%04x "
1259 DPRINTK("88==0x%04x "
1266 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1267 * @id: IDENTIFY data to compute xfer mask from
1269 * Compute the xfermask for this device. This is not as trivial
1270 * as it seems if we must consider early devices correctly.
1272 * FIXME: pre IDE drive timing (do we care ?).
1280 static unsigned int ata_id_xfermask(const u16
*id
)
1282 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1284 /* Usual case. Word 53 indicates word 64 is valid */
1285 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1286 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1290 /* If word 64 isn't valid then Word 51 high byte holds
1291 * the PIO timing number for the maximum. Turn it into
1294 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1295 if (mode
< 5) /* Valid PIO range */
1296 pio_mask
= (2 << mode
) - 1;
1300 /* But wait.. there's more. Design your standards by
1301 * committee and you too can get a free iordy field to
1302 * process. However its the speeds not the modes that
1303 * are supported... Note drivers using the timing API
1304 * will get this right anyway
1308 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1310 if (ata_id_is_cfa(id
)) {
1312 * Process compact flash extended modes
1314 int pio
= id
[163] & 0x7;
1315 int dma
= (id
[163] >> 3) & 7;
1318 pio_mask
|= (1 << 5);
1320 pio_mask
|= (1 << 6);
1322 mwdma_mask
|= (1 << 3);
1324 mwdma_mask
|= (1 << 4);
1328 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1329 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1331 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1335 * ata_port_queue_task - Queue port_task
1336 * @ap: The ata_port to queue port_task for
1337 * @fn: workqueue function to be scheduled
1338 * @data: data for @fn to use
1339 * @delay: delay time for workqueue function
1341 * Schedule @fn(@data) for execution after @delay jiffies using
1342 * port_task. There is one port_task per port and it's the
1343 * user(low level driver)'s responsibility to make sure that only
1344 * one task is active at any given time.
1346 * libata core layer takes care of synchronization between
1347 * port_task and EH. ata_port_queue_task() may be ignored for EH
1351 * Inherited from caller.
1353 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1354 unsigned long delay
)
1356 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1357 ap
->port_task_data
= data
;
1359 /* may fail if ata_port_flush_task() in progress */
1360 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1364 * ata_port_flush_task - Flush port_task
1365 * @ap: The ata_port to flush port_task for
1367 * After this function completes, port_task is guranteed not to
1368 * be running or scheduled.
1371 * Kernel thread context (may sleep)
1373 void ata_port_flush_task(struct ata_port
*ap
)
1377 cancel_rearming_delayed_work(&ap
->port_task
);
1379 if (ata_msg_ctl(ap
))
1380 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1383 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1385 struct completion
*waiting
= qc
->private_data
;
1391 * ata_exec_internal_sg - execute libata internal command
1392 * @dev: Device to which the command is sent
1393 * @tf: Taskfile registers for the command and the result
1394 * @cdb: CDB for packet command
1395 * @dma_dir: Data tranfer direction of the command
1396 * @sgl: sg list for the data buffer of the command
1397 * @n_elem: Number of sg entries
1398 * @timeout: Timeout in msecs (0 for default)
1400 * Executes libata internal command with timeout. @tf contains
1401 * command on entry and result on return. Timeout and error
1402 * conditions are reported via return value. No recovery action
1403 * is taken after a command times out. It's caller's duty to
1404 * clean up after timeout.
1407 * None. Should be called with kernel context, might sleep.
1410 * Zero on success, AC_ERR_* mask on failure
1412 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1413 struct ata_taskfile
*tf
, const u8
*cdb
,
1414 int dma_dir
, struct scatterlist
*sgl
,
1415 unsigned int n_elem
, unsigned long timeout
)
1417 struct ata_link
*link
= dev
->link
;
1418 struct ata_port
*ap
= link
->ap
;
1419 u8 command
= tf
->command
;
1420 struct ata_queued_cmd
*qc
;
1421 unsigned int tag
, preempted_tag
;
1422 u32 preempted_sactive
, preempted_qc_active
;
1423 int preempted_nr_active_links
;
1424 DECLARE_COMPLETION_ONSTACK(wait
);
1425 unsigned long flags
;
1426 unsigned int err_mask
;
1429 spin_lock_irqsave(ap
->lock
, flags
);
1431 /* no internal command while frozen */
1432 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1433 spin_unlock_irqrestore(ap
->lock
, flags
);
1434 return AC_ERR_SYSTEM
;
1437 /* initialize internal qc */
1439 /* XXX: Tag 0 is used for drivers with legacy EH as some
1440 * drivers choke if any other tag is given. This breaks
1441 * ata_tag_internal() test for those drivers. Don't use new
1442 * EH stuff without converting to it.
1444 if (ap
->ops
->error_handler
)
1445 tag
= ATA_TAG_INTERNAL
;
1449 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1451 qc
= __ata_qc_from_tag(ap
, tag
);
1459 preempted_tag
= link
->active_tag
;
1460 preempted_sactive
= link
->sactive
;
1461 preempted_qc_active
= ap
->qc_active
;
1462 preempted_nr_active_links
= ap
->nr_active_links
;
1463 link
->active_tag
= ATA_TAG_POISON
;
1466 ap
->nr_active_links
= 0;
1468 /* prepare & issue qc */
1471 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1472 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1473 qc
->dma_dir
= dma_dir
;
1474 if (dma_dir
!= DMA_NONE
) {
1475 unsigned int i
, buflen
= 0;
1476 struct scatterlist
*sg
;
1478 for_each_sg(sgl
, sg
, n_elem
, i
)
1479 buflen
+= sg
->length
;
1481 ata_sg_init(qc
, sgl
, n_elem
);
1482 qc
->nbytes
= buflen
;
1485 qc
->private_data
= &wait
;
1486 qc
->complete_fn
= ata_qc_complete_internal
;
1490 spin_unlock_irqrestore(ap
->lock
, flags
);
1493 timeout
= ata_probe_timeout
* 1000 / HZ
;
1495 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1497 ata_port_flush_task(ap
);
1500 spin_lock_irqsave(ap
->lock
, flags
);
1502 /* We're racing with irq here. If we lose, the
1503 * following test prevents us from completing the qc
1504 * twice. If we win, the port is frozen and will be
1505 * cleaned up by ->post_internal_cmd().
1507 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1508 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1510 if (ap
->ops
->error_handler
)
1511 ata_port_freeze(ap
);
1513 ata_qc_complete(qc
);
1515 if (ata_msg_warn(ap
))
1516 ata_dev_printk(dev
, KERN_WARNING
,
1517 "qc timeout (cmd 0x%x)\n", command
);
1520 spin_unlock_irqrestore(ap
->lock
, flags
);
1523 /* do post_internal_cmd */
1524 if (ap
->ops
->post_internal_cmd
)
1525 ap
->ops
->post_internal_cmd(qc
);
1527 /* perform minimal error analysis */
1528 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1529 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1530 qc
->err_mask
|= AC_ERR_DEV
;
1533 qc
->err_mask
|= AC_ERR_OTHER
;
1535 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1536 qc
->err_mask
&= ~AC_ERR_OTHER
;
1540 spin_lock_irqsave(ap
->lock
, flags
);
1542 *tf
= qc
->result_tf
;
1543 err_mask
= qc
->err_mask
;
1546 link
->active_tag
= preempted_tag
;
1547 link
->sactive
= preempted_sactive
;
1548 ap
->qc_active
= preempted_qc_active
;
1549 ap
->nr_active_links
= preempted_nr_active_links
;
1551 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1552 * Until those drivers are fixed, we detect the condition
1553 * here, fail the command with AC_ERR_SYSTEM and reenable the
1556 * Note that this doesn't change any behavior as internal
1557 * command failure results in disabling the device in the
1558 * higher layer for LLDDs without new reset/EH callbacks.
1560 * Kill the following code as soon as those drivers are fixed.
1562 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1563 err_mask
|= AC_ERR_SYSTEM
;
1567 spin_unlock_irqrestore(ap
->lock
, flags
);
1573 * ata_exec_internal - execute libata internal command
1574 * @dev: Device to which the command is sent
1575 * @tf: Taskfile registers for the command and the result
1576 * @cdb: CDB for packet command
1577 * @dma_dir: Data tranfer direction of the command
1578 * @buf: Data buffer of the command
1579 * @buflen: Length of data buffer
1580 * @timeout: Timeout in msecs (0 for default)
1582 * Wrapper around ata_exec_internal_sg() which takes simple
1583 * buffer instead of sg list.
1586 * None. Should be called with kernel context, might sleep.
1589 * Zero on success, AC_ERR_* mask on failure
1591 unsigned ata_exec_internal(struct ata_device
*dev
,
1592 struct ata_taskfile
*tf
, const u8
*cdb
,
1593 int dma_dir
, void *buf
, unsigned int buflen
,
1594 unsigned long timeout
)
1596 struct scatterlist
*psg
= NULL
, sg
;
1597 unsigned int n_elem
= 0;
1599 if (dma_dir
!= DMA_NONE
) {
1601 sg_init_one(&sg
, buf
, buflen
);
1606 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1611 * ata_do_simple_cmd - execute simple internal command
1612 * @dev: Device to which the command is sent
1613 * @cmd: Opcode to execute
1615 * Execute a 'simple' command, that only consists of the opcode
1616 * 'cmd' itself, without filling any other registers
1619 * Kernel thread context (may sleep).
1622 * Zero on success, AC_ERR_* mask on failure
1624 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1626 struct ata_taskfile tf
;
1628 ata_tf_init(dev
, &tf
);
1631 tf
.flags
|= ATA_TFLAG_DEVICE
;
1632 tf
.protocol
= ATA_PROT_NODATA
;
1634 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1638 * ata_pio_need_iordy - check if iordy needed
1641 * Check if the current speed of the device requires IORDY. Used
1642 * by various controllers for chip configuration.
1645 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1647 /* Controller doesn't support IORDY. Probably a pointless check
1648 as the caller should know this */
1649 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1651 /* PIO3 and higher it is mandatory */
1652 if (adev
->pio_mode
> XFER_PIO_2
)
1654 /* We turn it on when possible */
1655 if (ata_id_has_iordy(adev
->id
))
1661 * ata_pio_mask_no_iordy - Return the non IORDY mask
1664 * Compute the highest mode possible if we are not using iordy. Return
1665 * -1 if no iordy mode is available.
1668 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1670 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1671 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1672 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1673 /* Is the speed faster than the drive allows non IORDY ? */
1675 /* This is cycle times not frequency - watch the logic! */
1676 if (pio
> 240) /* PIO2 is 240nS per cycle */
1677 return 3 << ATA_SHIFT_PIO
;
1678 return 7 << ATA_SHIFT_PIO
;
1681 return 3 << ATA_SHIFT_PIO
;
1685 * ata_dev_read_id - Read ID data from the specified device
1686 * @dev: target device
1687 * @p_class: pointer to class of the target device (may be changed)
1688 * @flags: ATA_READID_* flags
1689 * @id: buffer to read IDENTIFY data into
1691 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1692 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1693 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1694 * for pre-ATA4 drives.
1696 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1697 * now we abort if we hit that case.
1700 * Kernel thread context (may sleep)
1703 * 0 on success, -errno otherwise.
1705 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1706 unsigned int flags
, u16
*id
)
1708 struct ata_port
*ap
= dev
->link
->ap
;
1709 unsigned int class = *p_class
;
1710 struct ata_taskfile tf
;
1711 unsigned int err_mask
= 0;
1713 int may_fallback
= 1, tried_spinup
= 0;
1716 if (ata_msg_ctl(ap
))
1717 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1719 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1721 ata_tf_init(dev
, &tf
);
1725 tf
.command
= ATA_CMD_ID_ATA
;
1728 tf
.command
= ATA_CMD_ID_ATAPI
;
1732 reason
= "unsupported class";
1736 tf
.protocol
= ATA_PROT_PIO
;
1738 /* Some devices choke if TF registers contain garbage. Make
1739 * sure those are properly initialized.
1741 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1743 /* Device presence detection is unreliable on some
1744 * controllers. Always poll IDENTIFY if available.
1746 tf
.flags
|= ATA_TFLAG_POLLING
;
1748 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1749 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1751 if (err_mask
& AC_ERR_NODEV_HINT
) {
1752 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1753 ap
->print_id
, dev
->devno
);
1757 /* Device or controller might have reported the wrong
1758 * device class. Give a shot at the other IDENTIFY if
1759 * the current one is aborted by the device.
1762 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1765 if (class == ATA_DEV_ATA
)
1766 class = ATA_DEV_ATAPI
;
1768 class = ATA_DEV_ATA
;
1773 reason
= "I/O error";
1777 /* Falling back doesn't make sense if ID data was read
1778 * successfully at least once.
1782 swap_buf_le16(id
, ATA_ID_WORDS
);
1786 reason
= "device reports invalid type";
1788 if (class == ATA_DEV_ATA
) {
1789 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1792 if (ata_id_is_ata(id
))
1796 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1799 * Drive powered-up in standby mode, and requires a specific
1800 * SET_FEATURES spin-up subcommand before it will accept
1801 * anything other than the original IDENTIFY command.
1803 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1804 if (err_mask
&& id
[2] != 0x738c) {
1806 reason
= "SPINUP failed";
1810 * If the drive initially returned incomplete IDENTIFY info,
1811 * we now must reissue the IDENTIFY command.
1813 if (id
[2] == 0x37c8)
1817 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1819 * The exact sequence expected by certain pre-ATA4 drives is:
1821 * IDENTIFY (optional in early ATA)
1822 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1824 * Some drives were very specific about that exact sequence.
1826 * Note that ATA4 says lba is mandatory so the second check
1827 * shoud never trigger.
1829 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1830 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1833 reason
= "INIT_DEV_PARAMS failed";
1837 /* current CHS translation info (id[53-58]) might be
1838 * changed. reread the identify device info.
1840 flags
&= ~ATA_READID_POSTRESET
;
1850 if (ata_msg_warn(ap
))
1851 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1852 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1856 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1858 struct ata_port
*ap
= dev
->link
->ap
;
1859 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1862 static void ata_dev_config_ncq(struct ata_device
*dev
,
1863 char *desc
, size_t desc_sz
)
1865 struct ata_port
*ap
= dev
->link
->ap
;
1866 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1868 if (!ata_id_has_ncq(dev
->id
)) {
1872 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
1873 snprintf(desc
, desc_sz
, "NCQ (not used)");
1876 if (ap
->flags
& ATA_FLAG_NCQ
) {
1877 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1878 dev
->flags
|= ATA_DFLAG_NCQ
;
1881 if (hdepth
>= ddepth
)
1882 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1884 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1888 * ata_dev_configure - Configure the specified ATA/ATAPI device
1889 * @dev: Target device to configure
1891 * Configure @dev according to @dev->id. Generic and low-level
1892 * driver specific fixups are also applied.
1895 * Kernel thread context (may sleep)
1898 * 0 on success, -errno otherwise
1900 int ata_dev_configure(struct ata_device
*dev
)
1902 struct ata_port
*ap
= dev
->link
->ap
;
1903 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1904 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1905 const u16
*id
= dev
->id
;
1906 unsigned int xfer_mask
;
1907 char revbuf
[7]; /* XYZ-99\0 */
1908 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1909 char modelbuf
[ATA_ID_PROD_LEN
+1];
1912 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1913 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1918 if (ata_msg_probe(ap
))
1919 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1922 dev
->horkage
|= ata_dev_blacklisted(dev
);
1924 /* let ACPI work its magic */
1925 rc
= ata_acpi_on_devcfg(dev
);
1929 /* massage HPA, do it early as it might change IDENTIFY data */
1930 rc
= ata_hpa_resize(dev
);
1934 /* print device capabilities */
1935 if (ata_msg_probe(ap
))
1936 ata_dev_printk(dev
, KERN_DEBUG
,
1937 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1938 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1940 id
[49], id
[82], id
[83], id
[84],
1941 id
[85], id
[86], id
[87], id
[88]);
1943 /* initialize to-be-configured parameters */
1944 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1945 dev
->max_sectors
= 0;
1953 * common ATA, ATAPI feature tests
1956 /* find max transfer mode; for printk only */
1957 xfer_mask
= ata_id_xfermask(id
);
1959 if (ata_msg_probe(ap
))
1962 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1963 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1966 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1969 /* ATA-specific feature tests */
1970 if (dev
->class == ATA_DEV_ATA
) {
1971 if (ata_id_is_cfa(id
)) {
1972 if (id
[162] & 1) /* CPRM may make this media unusable */
1973 ata_dev_printk(dev
, KERN_WARNING
,
1974 "supports DRM functions and may "
1975 "not be fully accessable.\n");
1976 snprintf(revbuf
, 7, "CFA");
1978 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1980 dev
->n_sectors
= ata_id_n_sectors(id
);
1982 if (dev
->id
[59] & 0x100)
1983 dev
->multi_count
= dev
->id
[59] & 0xff;
1985 if (ata_id_has_lba(id
)) {
1986 const char *lba_desc
;
1990 dev
->flags
|= ATA_DFLAG_LBA
;
1991 if (ata_id_has_lba48(id
)) {
1992 dev
->flags
|= ATA_DFLAG_LBA48
;
1995 if (dev
->n_sectors
>= (1UL << 28) &&
1996 ata_id_has_flush_ext(id
))
1997 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2001 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2003 /* print device info to dmesg */
2004 if (ata_msg_drv(ap
) && print_info
) {
2005 ata_dev_printk(dev
, KERN_INFO
,
2006 "%s: %s, %s, max %s\n",
2007 revbuf
, modelbuf
, fwrevbuf
,
2008 ata_mode_string(xfer_mask
));
2009 ata_dev_printk(dev
, KERN_INFO
,
2010 "%Lu sectors, multi %u: %s %s\n",
2011 (unsigned long long)dev
->n_sectors
,
2012 dev
->multi_count
, lba_desc
, ncq_desc
);
2017 /* Default translation */
2018 dev
->cylinders
= id
[1];
2020 dev
->sectors
= id
[6];
2022 if (ata_id_current_chs_valid(id
)) {
2023 /* Current CHS translation is valid. */
2024 dev
->cylinders
= id
[54];
2025 dev
->heads
= id
[55];
2026 dev
->sectors
= id
[56];
2029 /* print device info to dmesg */
2030 if (ata_msg_drv(ap
) && print_info
) {
2031 ata_dev_printk(dev
, KERN_INFO
,
2032 "%s: %s, %s, max %s\n",
2033 revbuf
, modelbuf
, fwrevbuf
,
2034 ata_mode_string(xfer_mask
));
2035 ata_dev_printk(dev
, KERN_INFO
,
2036 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2037 (unsigned long long)dev
->n_sectors
,
2038 dev
->multi_count
, dev
->cylinders
,
2039 dev
->heads
, dev
->sectors
);
2046 /* ATAPI-specific feature tests */
2047 else if (dev
->class == ATA_DEV_ATAPI
) {
2048 const char *cdb_intr_string
= "";
2049 const char *atapi_an_string
= "";
2052 rc
= atapi_cdb_len(id
);
2053 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2054 if (ata_msg_warn(ap
))
2055 ata_dev_printk(dev
, KERN_WARNING
,
2056 "unsupported CDB len\n");
2060 dev
->cdb_len
= (unsigned int) rc
;
2062 /* Enable ATAPI AN if both the host and device have
2063 * the support. If PMP is attached, SNTF is required
2064 * to enable ATAPI AN to discern between PHY status
2065 * changed notifications and ATAPI ANs.
2067 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2068 (!ap
->nr_pmp_links
||
2069 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2070 unsigned int err_mask
;
2072 /* issue SET feature command to turn this on */
2073 err_mask
= ata_dev_set_feature(dev
,
2074 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2076 ata_dev_printk(dev
, KERN_ERR
,
2077 "failed to enable ATAPI AN "
2078 "(err_mask=0x%x)\n", err_mask
);
2080 dev
->flags
|= ATA_DFLAG_AN
;
2081 atapi_an_string
= ", ATAPI AN";
2085 if (ata_id_cdb_intr(dev
->id
)) {
2086 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2087 cdb_intr_string
= ", CDB intr";
2090 /* print device info to dmesg */
2091 if (ata_msg_drv(ap
) && print_info
)
2092 ata_dev_printk(dev
, KERN_INFO
,
2093 "ATAPI: %s, %s, max %s%s%s\n",
2095 ata_mode_string(xfer_mask
),
2096 cdb_intr_string
, atapi_an_string
);
2099 /* determine max_sectors */
2100 dev
->max_sectors
= ATA_MAX_SECTORS
;
2101 if (dev
->flags
& ATA_DFLAG_LBA48
)
2102 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2104 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2105 /* Let the user know. We don't want to disallow opens for
2106 rescue purposes, or in case the vendor is just a blithering
2109 ata_dev_printk(dev
, KERN_WARNING
,
2110 "Drive reports diagnostics failure. This may indicate a drive\n");
2111 ata_dev_printk(dev
, KERN_WARNING
,
2112 "fault or invalid emulation. Contact drive vendor for information.\n");
2116 /* limit bridge transfers to udma5, 200 sectors */
2117 if (ata_dev_knobble(dev
)) {
2118 if (ata_msg_drv(ap
) && print_info
)
2119 ata_dev_printk(dev
, KERN_INFO
,
2120 "applying bridge limits\n");
2121 dev
->udma_mask
&= ATA_UDMA5
;
2122 dev
->max_sectors
= ATA_MAX_SECTORS
;
2125 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2126 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2129 if (ap
->ops
->dev_config
)
2130 ap
->ops
->dev_config(dev
);
2132 if (ata_msg_probe(ap
))
2133 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2134 __FUNCTION__
, ata_chk_status(ap
));
2138 if (ata_msg_probe(ap
))
2139 ata_dev_printk(dev
, KERN_DEBUG
,
2140 "%s: EXIT, err\n", __FUNCTION__
);
2145 * ata_cable_40wire - return 40 wire cable type
2148 * Helper method for drivers which want to hardwire 40 wire cable
2152 int ata_cable_40wire(struct ata_port
*ap
)
2154 return ATA_CBL_PATA40
;
2158 * ata_cable_80wire - return 80 wire cable type
2161 * Helper method for drivers which want to hardwire 80 wire cable
2165 int ata_cable_80wire(struct ata_port
*ap
)
2167 return ATA_CBL_PATA80
;
2171 * ata_cable_unknown - return unknown PATA cable.
2174 * Helper method for drivers which have no PATA cable detection.
2177 int ata_cable_unknown(struct ata_port
*ap
)
2179 return ATA_CBL_PATA_UNK
;
2183 * ata_cable_sata - return SATA cable type
2186 * Helper method for drivers which have SATA cables
2189 int ata_cable_sata(struct ata_port
*ap
)
2191 return ATA_CBL_SATA
;
2195 * ata_bus_probe - Reset and probe ATA bus
2198 * Master ATA bus probing function. Initiates a hardware-dependent
2199 * bus reset, then attempts to identify any devices found on
2203 * PCI/etc. bus probe sem.
2206 * Zero on success, negative errno otherwise.
2209 int ata_bus_probe(struct ata_port
*ap
)
2211 unsigned int classes
[ATA_MAX_DEVICES
];
2212 int tries
[ATA_MAX_DEVICES
];
2214 struct ata_device
*dev
;
2218 ata_link_for_each_dev(dev
, &ap
->link
)
2219 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2222 /* reset and determine device classes */
2223 ap
->ops
->phy_reset(ap
);
2225 ata_link_for_each_dev(dev
, &ap
->link
) {
2226 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2227 dev
->class != ATA_DEV_UNKNOWN
)
2228 classes
[dev
->devno
] = dev
->class;
2230 classes
[dev
->devno
] = ATA_DEV_NONE
;
2232 dev
->class = ATA_DEV_UNKNOWN
;
2237 /* after the reset the device state is PIO 0 and the controller
2238 state is undefined. Record the mode */
2240 ata_link_for_each_dev(dev
, &ap
->link
)
2241 dev
->pio_mode
= XFER_PIO_0
;
2243 /* read IDENTIFY page and configure devices. We have to do the identify
2244 specific sequence bass-ackwards so that PDIAG- is released by
2247 ata_link_for_each_dev(dev
, &ap
->link
) {
2248 if (tries
[dev
->devno
])
2249 dev
->class = classes
[dev
->devno
];
2251 if (!ata_dev_enabled(dev
))
2254 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2260 /* Now ask for the cable type as PDIAG- should have been released */
2261 if (ap
->ops
->cable_detect
)
2262 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2264 /* We may have SATA bridge glue hiding here irrespective of the
2265 reported cable types and sensed types */
2266 ata_link_for_each_dev(dev
, &ap
->link
) {
2267 if (!ata_dev_enabled(dev
))
2269 /* SATA drives indicate we have a bridge. We don't know which
2270 end of the link the bridge is which is a problem */
2271 if (ata_id_is_sata(dev
->id
))
2272 ap
->cbl
= ATA_CBL_SATA
;
2275 /* After the identify sequence we can now set up the devices. We do
2276 this in the normal order so that the user doesn't get confused */
2278 ata_link_for_each_dev(dev
, &ap
->link
) {
2279 if (!ata_dev_enabled(dev
))
2282 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2283 rc
= ata_dev_configure(dev
);
2284 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2289 /* configure transfer mode */
2290 rc
= ata_set_mode(&ap
->link
, &dev
);
2294 ata_link_for_each_dev(dev
, &ap
->link
)
2295 if (ata_dev_enabled(dev
))
2298 /* no device present, disable port */
2299 ata_port_disable(ap
);
2303 tries
[dev
->devno
]--;
2307 /* eeek, something went very wrong, give up */
2308 tries
[dev
->devno
] = 0;
2312 /* give it just one more chance */
2313 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2315 if (tries
[dev
->devno
] == 1) {
2316 /* This is the last chance, better to slow
2317 * down than lose it.
2319 sata_down_spd_limit(&ap
->link
);
2320 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2324 if (!tries
[dev
->devno
])
2325 ata_dev_disable(dev
);
2331 * ata_port_probe - Mark port as enabled
2332 * @ap: Port for which we indicate enablement
2334 * Modify @ap data structure such that the system
2335 * thinks that the entire port is enabled.
2337 * LOCKING: host lock, or some other form of
2341 void ata_port_probe(struct ata_port
*ap
)
2343 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2347 * sata_print_link_status - Print SATA link status
2348 * @link: SATA link to printk link status about
2350 * This function prints link speed and status of a SATA link.
2355 void sata_print_link_status(struct ata_link
*link
)
2357 u32 sstatus
, scontrol
, tmp
;
2359 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2361 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2363 if (ata_link_online(link
)) {
2364 tmp
= (sstatus
>> 4) & 0xf;
2365 ata_link_printk(link
, KERN_INFO
,
2366 "SATA link up %s (SStatus %X SControl %X)\n",
2367 sata_spd_string(tmp
), sstatus
, scontrol
);
2369 ata_link_printk(link
, KERN_INFO
,
2370 "SATA link down (SStatus %X SControl %X)\n",
2376 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2377 * @ap: SATA port associated with target SATA PHY.
2379 * This function issues commands to standard SATA Sxxx
2380 * PHY registers, to wake up the phy (and device), and
2381 * clear any reset condition.
2384 * PCI/etc. bus probe sem.
2387 void __sata_phy_reset(struct ata_port
*ap
)
2389 struct ata_link
*link
= &ap
->link
;
2390 unsigned long timeout
= jiffies
+ (HZ
* 5);
2393 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2394 /* issue phy wake/reset */
2395 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2396 /* Couldn't find anything in SATA I/II specs, but
2397 * AHCI-1.1 10.4.2 says at least 1 ms. */
2400 /* phy wake/clear reset */
2401 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2403 /* wait for phy to become ready, if necessary */
2406 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2407 if ((sstatus
& 0xf) != 1)
2409 } while (time_before(jiffies
, timeout
));
2411 /* print link status */
2412 sata_print_link_status(link
);
2414 /* TODO: phy layer with polling, timeouts, etc. */
2415 if (!ata_link_offline(link
))
2418 ata_port_disable(ap
);
2420 if (ap
->flags
& ATA_FLAG_DISABLED
)
2423 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2424 ata_port_disable(ap
);
2428 ap
->cbl
= ATA_CBL_SATA
;
2432 * sata_phy_reset - Reset SATA bus.
2433 * @ap: SATA port associated with target SATA PHY.
2435 * This function resets the SATA bus, and then probes
2436 * the bus for devices.
2439 * PCI/etc. bus probe sem.
2442 void sata_phy_reset(struct ata_port
*ap
)
2444 __sata_phy_reset(ap
);
2445 if (ap
->flags
& ATA_FLAG_DISABLED
)
2451 * ata_dev_pair - return other device on cable
2454 * Obtain the other device on the same cable, or if none is
2455 * present NULL is returned
2458 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2460 struct ata_link
*link
= adev
->link
;
2461 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2462 if (!ata_dev_enabled(pair
))
2468 * ata_port_disable - Disable port.
2469 * @ap: Port to be disabled.
2471 * Modify @ap data structure such that the system
2472 * thinks that the entire port is disabled, and should
2473 * never attempt to probe or communicate with devices
2476 * LOCKING: host lock, or some other form of
2480 void ata_port_disable(struct ata_port
*ap
)
2482 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2483 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2484 ap
->flags
|= ATA_FLAG_DISABLED
;
2488 * sata_down_spd_limit - adjust SATA spd limit downward
2489 * @link: Link to adjust SATA spd limit for
2491 * Adjust SATA spd limit of @link downward. Note that this
2492 * function only adjusts the limit. The change must be applied
2493 * using sata_set_spd().
2496 * Inherited from caller.
2499 * 0 on success, negative errno on failure
2501 int sata_down_spd_limit(struct ata_link
*link
)
2503 u32 sstatus
, spd
, mask
;
2506 if (!sata_scr_valid(link
))
2509 /* If SCR can be read, use it to determine the current SPD.
2510 * If not, use cached value in link->sata_spd.
2512 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2514 spd
= (sstatus
>> 4) & 0xf;
2516 spd
= link
->sata_spd
;
2518 mask
= link
->sata_spd_limit
;
2522 /* unconditionally mask off the highest bit */
2523 highbit
= fls(mask
) - 1;
2524 mask
&= ~(1 << highbit
);
2526 /* Mask off all speeds higher than or equal to the current
2527 * one. Force 1.5Gbps if current SPD is not available.
2530 mask
&= (1 << (spd
- 1)) - 1;
2534 /* were we already at the bottom? */
2538 link
->sata_spd_limit
= mask
;
2540 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2541 sata_spd_string(fls(mask
)));
2546 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2550 if (link
->sata_spd_limit
== UINT_MAX
)
2553 limit
= fls(link
->sata_spd_limit
);
2555 spd
= (*scontrol
>> 4) & 0xf;
2556 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2558 return spd
!= limit
;
2562 * sata_set_spd_needed - is SATA spd configuration needed
2563 * @link: Link in question
2565 * Test whether the spd limit in SControl matches
2566 * @link->sata_spd_limit. This function is used to determine
2567 * whether hardreset is necessary to apply SATA spd
2571 * Inherited from caller.
2574 * 1 if SATA spd configuration is needed, 0 otherwise.
2576 int sata_set_spd_needed(struct ata_link
*link
)
2580 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2583 return __sata_set_spd_needed(link
, &scontrol
);
2587 * sata_set_spd - set SATA spd according to spd limit
2588 * @link: Link to set SATA spd for
2590 * Set SATA spd of @link according to sata_spd_limit.
2593 * Inherited from caller.
2596 * 0 if spd doesn't need to be changed, 1 if spd has been
2597 * changed. Negative errno if SCR registers are inaccessible.
2599 int sata_set_spd(struct ata_link
*link
)
2604 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2607 if (!__sata_set_spd_needed(link
, &scontrol
))
2610 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2617 * This mode timing computation functionality is ported over from
2618 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2621 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2622 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2623 * for UDMA6, which is currently supported only by Maxtor drives.
2625 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2628 static const struct ata_timing ata_timing
[] = {
2630 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2631 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2632 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2633 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2635 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2636 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2637 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2638 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2639 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2641 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2643 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2644 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2645 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2647 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2648 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2649 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2651 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2652 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2653 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2654 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2656 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2657 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2658 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2660 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2665 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2666 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2668 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2670 q
->setup
= EZ(t
->setup
* 1000, T
);
2671 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2672 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2673 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2674 q
->active
= EZ(t
->active
* 1000, T
);
2675 q
->recover
= EZ(t
->recover
* 1000, T
);
2676 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2677 q
->udma
= EZ(t
->udma
* 1000, UT
);
2680 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2681 struct ata_timing
*m
, unsigned int what
)
2683 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2684 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2685 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2686 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2687 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2688 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2689 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2690 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2693 static const struct ata_timing
*ata_timing_find_mode(unsigned short speed
)
2695 const struct ata_timing
*t
;
2697 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2698 if (t
->mode
== 0xFF)
2703 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2704 struct ata_timing
*t
, int T
, int UT
)
2706 const struct ata_timing
*s
;
2707 struct ata_timing p
;
2713 if (!(s
= ata_timing_find_mode(speed
)))
2716 memcpy(t
, s
, sizeof(*s
));
2719 * If the drive is an EIDE drive, it can tell us it needs extended
2720 * PIO/MW_DMA cycle timing.
2723 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2724 memset(&p
, 0, sizeof(p
));
2725 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2726 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2727 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2728 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2729 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2731 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2735 * Convert the timing to bus clock counts.
2738 ata_timing_quantize(t
, t
, T
, UT
);
2741 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2742 * S.M.A.R.T * and some other commands. We have to ensure that the
2743 * DMA cycle timing is slower/equal than the fastest PIO timing.
2746 if (speed
> XFER_PIO_6
) {
2747 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2748 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2752 * Lengthen active & recovery time so that cycle time is correct.
2755 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2756 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2757 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2760 if (t
->active
+ t
->recover
< t
->cycle
) {
2761 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2762 t
->recover
= t
->cycle
- t
->active
;
2765 /* In a few cases quantisation may produce enough errors to
2766 leave t->cycle too low for the sum of active and recovery
2767 if so we must correct this */
2768 if (t
->active
+ t
->recover
> t
->cycle
)
2769 t
->cycle
= t
->active
+ t
->recover
;
2775 * ata_down_xfermask_limit - adjust dev xfer masks downward
2776 * @dev: Device to adjust xfer masks
2777 * @sel: ATA_DNXFER_* selector
2779 * Adjust xfer masks of @dev downward. Note that this function
2780 * does not apply the change. Invoking ata_set_mode() afterwards
2781 * will apply the limit.
2784 * Inherited from caller.
2787 * 0 on success, negative errno on failure
2789 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2792 unsigned int orig_mask
, xfer_mask
;
2793 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2796 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2797 sel
&= ~ATA_DNXFER_QUIET
;
2799 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2802 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2805 case ATA_DNXFER_PIO
:
2806 highbit
= fls(pio_mask
) - 1;
2807 pio_mask
&= ~(1 << highbit
);
2810 case ATA_DNXFER_DMA
:
2812 highbit
= fls(udma_mask
) - 1;
2813 udma_mask
&= ~(1 << highbit
);
2816 } else if (mwdma_mask
) {
2817 highbit
= fls(mwdma_mask
) - 1;
2818 mwdma_mask
&= ~(1 << highbit
);
2824 case ATA_DNXFER_40C
:
2825 udma_mask
&= ATA_UDMA_MASK_40C
;
2828 case ATA_DNXFER_FORCE_PIO0
:
2830 case ATA_DNXFER_FORCE_PIO
:
2839 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2841 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2845 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2846 snprintf(buf
, sizeof(buf
), "%s:%s",
2847 ata_mode_string(xfer_mask
),
2848 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2850 snprintf(buf
, sizeof(buf
), "%s",
2851 ata_mode_string(xfer_mask
));
2853 ata_dev_printk(dev
, KERN_WARNING
,
2854 "limiting speed to %s\n", buf
);
2857 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2863 static int ata_dev_set_mode(struct ata_device
*dev
)
2865 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2866 unsigned int err_mask
;
2869 dev
->flags
&= ~ATA_DFLAG_PIO
;
2870 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2871 dev
->flags
|= ATA_DFLAG_PIO
;
2873 err_mask
= ata_dev_set_xfermode(dev
);
2875 /* Old CFA may refuse this command, which is just fine */
2876 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2877 err_mask
&= ~AC_ERR_DEV
;
2879 /* Some very old devices and some bad newer ones fail any kind of
2880 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2881 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2882 dev
->pio_mode
<= XFER_PIO_2
)
2883 err_mask
&= ~AC_ERR_DEV
;
2885 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
2886 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
2887 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
2888 dev
->dma_mode
== XFER_MW_DMA_0
&&
2889 (dev
->id
[63] >> 8) & 1)
2890 err_mask
&= ~AC_ERR_DEV
;
2893 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2894 "(err_mask=0x%x)\n", err_mask
);
2898 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2899 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
2900 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2904 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2905 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2907 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2908 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2913 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2914 * @link: link on which timings will be programmed
2915 * @r_failed_dev: out paramter for failed device
2917 * Standard implementation of the function used to tune and set
2918 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2919 * ata_dev_set_mode() fails, pointer to the failing device is
2920 * returned in @r_failed_dev.
2923 * PCI/etc. bus probe sem.
2926 * 0 on success, negative errno otherwise
2929 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2931 struct ata_port
*ap
= link
->ap
;
2932 struct ata_device
*dev
;
2933 int rc
= 0, used_dma
= 0, found
= 0;
2935 /* step 1: calculate xfer_mask */
2936 ata_link_for_each_dev(dev
, link
) {
2937 unsigned int pio_mask
, dma_mask
;
2938 unsigned int mode_mask
;
2940 if (!ata_dev_enabled(dev
))
2943 mode_mask
= ATA_DMA_MASK_ATA
;
2944 if (dev
->class == ATA_DEV_ATAPI
)
2945 mode_mask
= ATA_DMA_MASK_ATAPI
;
2946 else if (ata_id_is_cfa(dev
->id
))
2947 mode_mask
= ATA_DMA_MASK_CFA
;
2949 ata_dev_xfermask(dev
);
2951 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2952 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2954 if (libata_dma_mask
& mode_mask
)
2955 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2959 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2960 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2969 /* step 2: always set host PIO timings */
2970 ata_link_for_each_dev(dev
, link
) {
2971 if (!ata_dev_enabled(dev
))
2974 if (!dev
->pio_mode
) {
2975 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2980 dev
->xfer_mode
= dev
->pio_mode
;
2981 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2982 if (ap
->ops
->set_piomode
)
2983 ap
->ops
->set_piomode(ap
, dev
);
2986 /* step 3: set host DMA timings */
2987 ata_link_for_each_dev(dev
, link
) {
2988 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2991 dev
->xfer_mode
= dev
->dma_mode
;
2992 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2993 if (ap
->ops
->set_dmamode
)
2994 ap
->ops
->set_dmamode(ap
, dev
);
2997 /* step 4: update devices' xfer mode */
2998 ata_link_for_each_dev(dev
, link
) {
2999 /* don't update suspended devices' xfer mode */
3000 if (!ata_dev_enabled(dev
))
3003 rc
= ata_dev_set_mode(dev
);
3008 /* Record simplex status. If we selected DMA then the other
3009 * host channels are not permitted to do so.
3011 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3012 ap
->host
->simplex_claimed
= ap
;
3016 *r_failed_dev
= dev
;
3021 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3022 * @link: link on which timings will be programmed
3023 * @r_failed_dev: out paramter for failed device
3025 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3026 * ata_set_mode() fails, pointer to the failing device is
3027 * returned in @r_failed_dev.
3030 * PCI/etc. bus probe sem.
3033 * 0 on success, negative errno otherwise
3035 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3037 struct ata_port
*ap
= link
->ap
;
3039 /* has private set_mode? */
3040 if (ap
->ops
->set_mode
)
3041 return ap
->ops
->set_mode(link
, r_failed_dev
);
3042 return ata_do_set_mode(link
, r_failed_dev
);
3046 * ata_tf_to_host - issue ATA taskfile to host controller
3047 * @ap: port to which command is being issued
3048 * @tf: ATA taskfile register set
3050 * Issues ATA taskfile register set to ATA host controller,
3051 * with proper synchronization with interrupt handler and
3055 * spin_lock_irqsave(host lock)
3058 static inline void ata_tf_to_host(struct ata_port
*ap
,
3059 const struct ata_taskfile
*tf
)
3061 ap
->ops
->tf_load(ap
, tf
);
3062 ap
->ops
->exec_command(ap
, tf
);
3066 * ata_busy_sleep - sleep until BSY clears, or timeout
3067 * @ap: port containing status register to be polled
3068 * @tmout_pat: impatience timeout
3069 * @tmout: overall timeout
3071 * Sleep until ATA Status register bit BSY clears,
3072 * or a timeout occurs.
3075 * Kernel thread context (may sleep).
3078 * 0 on success, -errno otherwise.
3080 int ata_busy_sleep(struct ata_port
*ap
,
3081 unsigned long tmout_pat
, unsigned long tmout
)
3083 unsigned long timer_start
, timeout
;
3086 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3087 timer_start
= jiffies
;
3088 timeout
= timer_start
+ tmout_pat
;
3089 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3090 time_before(jiffies
, timeout
)) {
3092 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3095 if (status
!= 0xff && (status
& ATA_BUSY
))
3096 ata_port_printk(ap
, KERN_WARNING
,
3097 "port is slow to respond, please be patient "
3098 "(Status 0x%x)\n", status
);
3100 timeout
= timer_start
+ tmout
;
3101 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3102 time_before(jiffies
, timeout
)) {
3104 status
= ata_chk_status(ap
);
3110 if (status
& ATA_BUSY
) {
3111 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3112 "(%lu secs, Status 0x%x)\n",
3113 tmout
/ HZ
, status
);
3121 * ata_wait_ready - sleep until BSY clears, or timeout
3122 * @ap: port containing status register to be polled
3123 * @deadline: deadline jiffies for the operation
3125 * Sleep until ATA Status register bit BSY clears, or timeout
3129 * Kernel thread context (may sleep).
3132 * 0 on success, -errno otherwise.
3134 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3136 unsigned long start
= jiffies
;
3140 u8 status
= ata_chk_status(ap
);
3141 unsigned long now
= jiffies
;
3143 if (!(status
& ATA_BUSY
))
3145 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3147 if (time_after(now
, deadline
))
3150 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3151 (deadline
- now
> 3 * HZ
)) {
3152 ata_port_printk(ap
, KERN_WARNING
,
3153 "port is slow to respond, please be patient "
3154 "(Status 0x%x)\n", status
);
3162 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3163 unsigned long deadline
)
3165 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3166 unsigned int dev0
= devmask
& (1 << 0);
3167 unsigned int dev1
= devmask
& (1 << 1);
3170 /* if device 0 was found in ata_devchk, wait for its
3174 rc
= ata_wait_ready(ap
, deadline
);
3182 /* if device 1 was found in ata_devchk, wait for register
3183 * access briefly, then wait for BSY to clear.
3188 ap
->ops
->dev_select(ap
, 1);
3190 /* Wait for register access. Some ATAPI devices fail
3191 * to set nsect/lbal after reset, so don't waste too
3192 * much time on it. We're gonna wait for !BSY anyway.
3194 for (i
= 0; i
< 2; i
++) {
3197 nsect
= ioread8(ioaddr
->nsect_addr
);
3198 lbal
= ioread8(ioaddr
->lbal_addr
);
3199 if ((nsect
== 1) && (lbal
== 1))
3201 msleep(50); /* give drive a breather */
3204 rc
= ata_wait_ready(ap
, deadline
);
3212 /* is all this really necessary? */
3213 ap
->ops
->dev_select(ap
, 0);
3215 ap
->ops
->dev_select(ap
, 1);
3217 ap
->ops
->dev_select(ap
, 0);
3222 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3223 unsigned long deadline
)
3225 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3226 struct ata_device
*dev
;
3229 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3231 /* software reset. causes dev0 to be selected */
3232 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3233 udelay(20); /* FIXME: flush */
3234 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3235 udelay(20); /* FIXME: flush */
3236 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3238 /* If we issued an SRST then an ATA drive (not ATAPI)
3239 * may have changed configuration and be in PIO0 timing. If
3240 * we did a hard reset (or are coming from power on) this is
3241 * true for ATA or ATAPI. Until we've set a suitable controller
3242 * mode we should not touch the bus as we may be talking too fast.
3245 ata_link_for_each_dev(dev
, &ap
->link
)
3246 dev
->pio_mode
= XFER_PIO_0
;
3248 /* If the controller has a pio mode setup function then use
3249 it to set the chipset to rights. Don't touch the DMA setup
3250 as that will be dealt with when revalidating */
3251 if (ap
->ops
->set_piomode
) {
3252 ata_link_for_each_dev(dev
, &ap
->link
)
3253 if (devmask
& (1 << i
++))
3254 ap
->ops
->set_piomode(ap
, dev
);
3257 /* spec mandates ">= 2ms" before checking status.
3258 * We wait 150ms, because that was the magic delay used for
3259 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3260 * between when the ATA command register is written, and then
3261 * status is checked. Because waiting for "a while" before
3262 * checking status is fine, post SRST, we perform this magic
3263 * delay here as well.
3265 * Old drivers/ide uses the 2mS rule and then waits for ready
3269 /* Before we perform post reset processing we want to see if
3270 * the bus shows 0xFF because the odd clown forgets the D7
3271 * pulldown resistor.
3273 if (ata_chk_status(ap
) == 0xFF)
3276 return ata_bus_post_reset(ap
, devmask
, deadline
);
3280 * ata_bus_reset - reset host port and associated ATA channel
3281 * @ap: port to reset
3283 * This is typically the first time we actually start issuing
3284 * commands to the ATA channel. We wait for BSY to clear, then
3285 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3286 * result. Determine what devices, if any, are on the channel
3287 * by looking at the device 0/1 error register. Look at the signature
3288 * stored in each device's taskfile registers, to determine if
3289 * the device is ATA or ATAPI.
3292 * PCI/etc. bus probe sem.
3293 * Obtains host lock.
3296 * Sets ATA_FLAG_DISABLED if bus reset fails.
3299 void ata_bus_reset(struct ata_port
*ap
)
3301 struct ata_device
*device
= ap
->link
.device
;
3302 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3303 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3305 unsigned int dev0
, dev1
= 0, devmask
= 0;
3308 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3310 /* determine if device 0/1 are present */
3311 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3314 dev0
= ata_devchk(ap
, 0);
3316 dev1
= ata_devchk(ap
, 1);
3320 devmask
|= (1 << 0);
3322 devmask
|= (1 << 1);
3324 /* select device 0 again */
3325 ap
->ops
->dev_select(ap
, 0);
3327 /* issue bus reset */
3328 if (ap
->flags
& ATA_FLAG_SRST
) {
3329 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3330 if (rc
&& rc
!= -ENODEV
)
3335 * determine by signature whether we have ATA or ATAPI devices
3337 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3338 if ((slave_possible
) && (err
!= 0x81))
3339 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3341 /* is double-select really necessary? */
3342 if (device
[1].class != ATA_DEV_NONE
)
3343 ap
->ops
->dev_select(ap
, 1);
3344 if (device
[0].class != ATA_DEV_NONE
)
3345 ap
->ops
->dev_select(ap
, 0);
3347 /* if no devices were detected, disable this port */
3348 if ((device
[0].class == ATA_DEV_NONE
) &&
3349 (device
[1].class == ATA_DEV_NONE
))
3352 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3353 /* set up device control for ATA_FLAG_SATA_RESET */
3354 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3361 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3362 ata_port_disable(ap
);
3368 * sata_link_debounce - debounce SATA phy status
3369 * @link: ATA link to debounce SATA phy status for
3370 * @params: timing parameters { interval, duratinon, timeout } in msec
3371 * @deadline: deadline jiffies for the operation
3373 * Make sure SStatus of @link reaches stable state, determined by
3374 * holding the same value where DET is not 1 for @duration polled
3375 * every @interval, before @timeout. Timeout constraints the
3376 * beginning of the stable state. Because DET gets stuck at 1 on
3377 * some controllers after hot unplugging, this functions waits
3378 * until timeout then returns 0 if DET is stable at 1.
3380 * @timeout is further limited by @deadline. The sooner of the
3384 * Kernel thread context (may sleep)
3387 * 0 on success, -errno on failure.
3389 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3390 unsigned long deadline
)
3392 unsigned long interval_msec
= params
[0];
3393 unsigned long duration
= msecs_to_jiffies(params
[1]);
3394 unsigned long last_jiffies
, t
;
3398 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3399 if (time_before(t
, deadline
))
3402 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3407 last_jiffies
= jiffies
;
3410 msleep(interval_msec
);
3411 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3417 if (cur
== 1 && time_before(jiffies
, deadline
))
3419 if (time_after(jiffies
, last_jiffies
+ duration
))
3424 /* unstable, start over */
3426 last_jiffies
= jiffies
;
3428 /* Check deadline. If debouncing failed, return
3429 * -EPIPE to tell upper layer to lower link speed.
3431 if (time_after(jiffies
, deadline
))
3437 * sata_link_resume - resume SATA link
3438 * @link: ATA link to resume SATA
3439 * @params: timing parameters { interval, duratinon, timeout } in msec
3440 * @deadline: deadline jiffies for the operation
3442 * Resume SATA phy @link and debounce it.
3445 * Kernel thread context (may sleep)
3448 * 0 on success, -errno on failure.
3450 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3451 unsigned long deadline
)
3456 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3459 scontrol
= (scontrol
& 0x0f0) | 0x300;
3461 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3464 /* Some PHYs react badly if SStatus is pounded immediately
3465 * after resuming. Delay 200ms before debouncing.
3469 return sata_link_debounce(link
, params
, deadline
);
3473 * ata_std_prereset - prepare for reset
3474 * @link: ATA link to be reset
3475 * @deadline: deadline jiffies for the operation
3477 * @link is about to be reset. Initialize it. Failure from
3478 * prereset makes libata abort whole reset sequence and give up
3479 * that port, so prereset should be best-effort. It does its
3480 * best to prepare for reset sequence but if things go wrong, it
3481 * should just whine, not fail.
3484 * Kernel thread context (may sleep)
3487 * 0 on success, -errno otherwise.
3489 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3491 struct ata_port
*ap
= link
->ap
;
3492 struct ata_eh_context
*ehc
= &link
->eh_context
;
3493 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3496 /* handle link resume */
3497 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3498 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3499 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3501 /* Some PMPs don't work with only SRST, force hardreset if PMP
3504 if (ap
->flags
& ATA_FLAG_PMP
)
3505 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3507 /* if we're about to do hardreset, nothing more to do */
3508 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3511 /* if SATA, resume link */
3512 if (ap
->flags
& ATA_FLAG_SATA
) {
3513 rc
= sata_link_resume(link
, timing
, deadline
);
3514 /* whine about phy resume failure but proceed */
3515 if (rc
&& rc
!= -EOPNOTSUPP
)
3516 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3517 "link for reset (errno=%d)\n", rc
);
3520 /* Wait for !BSY if the controller can wait for the first D2H
3521 * Reg FIS and we don't know that no device is attached.
3523 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3524 rc
= ata_wait_ready(ap
, deadline
);
3525 if (rc
&& rc
!= -ENODEV
) {
3526 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3527 "(errno=%d), forcing hardreset\n", rc
);
3528 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3536 * ata_std_softreset - reset host port via ATA SRST
3537 * @link: ATA link to reset
3538 * @classes: resulting classes of attached devices
3539 * @deadline: deadline jiffies for the operation
3541 * Reset host port using ATA SRST.
3544 * Kernel thread context (may sleep)
3547 * 0 on success, -errno otherwise.
3549 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3550 unsigned long deadline
)
3552 struct ata_port
*ap
= link
->ap
;
3553 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3554 unsigned int devmask
= 0;
3560 if (ata_link_offline(link
)) {
3561 classes
[0] = ATA_DEV_NONE
;
3565 /* determine if device 0/1 are present */
3566 if (ata_devchk(ap
, 0))
3567 devmask
|= (1 << 0);
3568 if (slave_possible
&& ata_devchk(ap
, 1))
3569 devmask
|= (1 << 1);
3571 /* select device 0 again */
3572 ap
->ops
->dev_select(ap
, 0);
3574 /* issue bus reset */
3575 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3576 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3577 /* if link is occupied, -ENODEV too is an error */
3578 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3579 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3583 /* determine by signature whether we have ATA or ATAPI devices */
3584 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3585 devmask
& (1 << 0), &err
);
3586 if (slave_possible
&& err
!= 0x81)
3587 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3588 devmask
& (1 << 1), &err
);
3591 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3596 * sata_link_hardreset - reset link via SATA phy reset
3597 * @link: link to reset
3598 * @timing: timing parameters { interval, duratinon, timeout } in msec
3599 * @deadline: deadline jiffies for the operation
3601 * SATA phy-reset @link using DET bits of SControl register.
3604 * Kernel thread context (may sleep)
3607 * 0 on success, -errno otherwise.
3609 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3610 unsigned long deadline
)
3617 if (sata_set_spd_needed(link
)) {
3618 /* SATA spec says nothing about how to reconfigure
3619 * spd. To be on the safe side, turn off phy during
3620 * reconfiguration. This works for at least ICH7 AHCI
3623 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3626 scontrol
= (scontrol
& 0x0f0) | 0x304;
3628 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3634 /* issue phy wake/reset */
3635 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3638 scontrol
= (scontrol
& 0x0f0) | 0x301;
3640 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3643 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3644 * 10.4.2 says at least 1 ms.
3648 /* bring link back */
3649 rc
= sata_link_resume(link
, timing
, deadline
);
3651 DPRINTK("EXIT, rc=%d\n", rc
);
3656 * sata_std_hardreset - reset host port via SATA phy reset
3657 * @link: link to reset
3658 * @class: resulting class of attached device
3659 * @deadline: deadline jiffies for the operation
3661 * SATA phy-reset host port using DET bits of SControl register,
3662 * wait for !BSY and classify the attached device.
3665 * Kernel thread context (may sleep)
3668 * 0 on success, -errno otherwise.
3670 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3671 unsigned long deadline
)
3673 struct ata_port
*ap
= link
->ap
;
3674 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3680 rc
= sata_link_hardreset(link
, timing
, deadline
);
3682 ata_link_printk(link
, KERN_ERR
,
3683 "COMRESET failed (errno=%d)\n", rc
);
3687 /* TODO: phy layer with polling, timeouts, etc. */
3688 if (ata_link_offline(link
)) {
3689 *class = ATA_DEV_NONE
;
3690 DPRINTK("EXIT, link offline\n");
3694 /* wait a while before checking status, see SRST for more info */
3697 /* If PMP is supported, we have to do follow-up SRST. Note
3698 * that some PMPs don't send D2H Reg FIS after hardreset at
3699 * all if the first port is empty. Wait for it just for a
3700 * second and request follow-up SRST.
3702 if (ap
->flags
& ATA_FLAG_PMP
) {
3703 ata_wait_ready(ap
, jiffies
+ HZ
);
3707 rc
= ata_wait_ready(ap
, deadline
);
3708 /* link occupied, -ENODEV too is an error */
3710 ata_link_printk(link
, KERN_ERR
,
3711 "COMRESET failed (errno=%d)\n", rc
);
3715 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3717 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3719 DPRINTK("EXIT, class=%u\n", *class);
3724 * ata_std_postreset - standard postreset callback
3725 * @link: the target ata_link
3726 * @classes: classes of attached devices
3728 * This function is invoked after a successful reset. Note that
3729 * the device might have been reset more than once using
3730 * different reset methods before postreset is invoked.
3733 * Kernel thread context (may sleep)
3735 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3737 struct ata_port
*ap
= link
->ap
;
3742 /* print link status */
3743 sata_print_link_status(link
);
3746 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3747 sata_scr_write(link
, SCR_ERROR
, serror
);
3749 /* is double-select really necessary? */
3750 if (classes
[0] != ATA_DEV_NONE
)
3751 ap
->ops
->dev_select(ap
, 1);
3752 if (classes
[1] != ATA_DEV_NONE
)
3753 ap
->ops
->dev_select(ap
, 0);
3755 /* bail out if no device is present */
3756 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3757 DPRINTK("EXIT, no device\n");
3761 /* set up device control */
3762 if (ap
->ioaddr
.ctl_addr
)
3763 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3769 * ata_dev_same_device - Determine whether new ID matches configured device
3770 * @dev: device to compare against
3771 * @new_class: class of the new device
3772 * @new_id: IDENTIFY page of the new device
3774 * Compare @new_class and @new_id against @dev and determine
3775 * whether @dev is the device indicated by @new_class and
3782 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3784 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3787 const u16
*old_id
= dev
->id
;
3788 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3789 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3791 if (dev
->class != new_class
) {
3792 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3793 dev
->class, new_class
);
3797 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3798 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3799 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3800 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3802 if (strcmp(model
[0], model
[1])) {
3803 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3804 "'%s' != '%s'\n", model
[0], model
[1]);
3808 if (strcmp(serial
[0], serial
[1])) {
3809 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3810 "'%s' != '%s'\n", serial
[0], serial
[1]);
3818 * ata_dev_reread_id - Re-read IDENTIFY data
3819 * @dev: target ATA device
3820 * @readid_flags: read ID flags
3822 * Re-read IDENTIFY page and make sure @dev is still attached to
3826 * Kernel thread context (may sleep)
3829 * 0 on success, negative errno otherwise
3831 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3833 unsigned int class = dev
->class;
3834 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3838 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3842 /* is the device still there? */
3843 if (!ata_dev_same_device(dev
, class, id
))
3846 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3851 * ata_dev_revalidate - Revalidate ATA device
3852 * @dev: device to revalidate
3853 * @new_class: new class code
3854 * @readid_flags: read ID flags
3856 * Re-read IDENTIFY page, make sure @dev is still attached to the
3857 * port and reconfigure it according to the new IDENTIFY page.
3860 * Kernel thread context (may sleep)
3863 * 0 on success, negative errno otherwise
3865 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3866 unsigned int readid_flags
)
3868 u64 n_sectors
= dev
->n_sectors
;
3871 if (!ata_dev_enabled(dev
))
3874 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3875 if (ata_class_enabled(new_class
) &&
3876 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3877 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3878 dev
->class, new_class
);
3884 rc
= ata_dev_reread_id(dev
, readid_flags
);
3888 /* configure device according to the new ID */
3889 rc
= ata_dev_configure(dev
);
3893 /* verify n_sectors hasn't changed */
3894 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3895 dev
->n_sectors
!= n_sectors
) {
3896 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3898 (unsigned long long)n_sectors
,
3899 (unsigned long long)dev
->n_sectors
);
3901 /* restore original n_sectors */
3902 dev
->n_sectors
= n_sectors
;
3911 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3915 struct ata_blacklist_entry
{
3916 const char *model_num
;
3917 const char *model_rev
;
3918 unsigned long horkage
;
3921 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3922 /* Devices with DMA related problems under Linux */
3923 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3924 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3925 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3926 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3927 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3928 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3929 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3930 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3931 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3932 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3933 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3934 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3935 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3936 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3937 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3938 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3939 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3940 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3941 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3942 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3943 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3944 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3945 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3946 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3947 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3948 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3949 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3950 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3951 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3952 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3953 /* Odd clown on sil3726/4726 PMPs */
3954 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
3955 ATA_HORKAGE_SKIP_PM
},
3957 /* Weird ATAPI devices */
3958 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3960 /* Devices we expect to fail diagnostics */
3962 /* Devices where NCQ should be avoided */
3964 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3965 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3966 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3968 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3969 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3970 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
3971 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
3972 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3974 /* Blacklist entries taken from Silicon Image 3124/3132
3975 Windows driver .inf file - also several Linux problem reports */
3976 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3977 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3978 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3979 /* Drives which do spurious command completion */
3980 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3981 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3982 { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ
, },
3983 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
3984 { "Hitachi HTS542525K9SA00", "BBFOC31P", ATA_HORKAGE_NONCQ
, },
3985 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3986 { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ
, },
3987 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
3988 { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3989 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
3990 { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ
, },
3991 { "ST9160821AS", "3.CCD", ATA_HORKAGE_NONCQ
, },
3992 { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ
, },
3993 { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ
, },
3994 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
3996 /* devices which puke on READ_NATIVE_MAX */
3997 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3998 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3999 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4000 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4002 /* Devices which report 1 sector over size HPA */
4003 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4004 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4010 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4016 * check for trailing wildcard: *\0
4018 p
= strchr(patt
, wildchar
);
4019 if (p
&& ((*(p
+ 1)) == 0))
4030 return strncmp(patt
, name
, len
);
4033 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4035 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4036 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4037 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4039 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4040 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4042 while (ad
->model_num
) {
4043 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4044 if (ad
->model_rev
== NULL
)
4046 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4054 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4056 /* We don't support polling DMA.
4057 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4058 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4060 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4061 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4063 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4067 * ata_dev_xfermask - Compute supported xfermask of the given device
4068 * @dev: Device to compute xfermask for
4070 * Compute supported xfermask of @dev and store it in
4071 * dev->*_mask. This function is responsible for applying all
4072 * known limits including host controller limits, device
4078 static void ata_dev_xfermask(struct ata_device
*dev
)
4080 struct ata_link
*link
= dev
->link
;
4081 struct ata_port
*ap
= link
->ap
;
4082 struct ata_host
*host
= ap
->host
;
4083 unsigned long xfer_mask
;
4085 /* controller modes available */
4086 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4087 ap
->mwdma_mask
, ap
->udma_mask
);
4089 /* drive modes available */
4090 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4091 dev
->mwdma_mask
, dev
->udma_mask
);
4092 xfer_mask
&= ata_id_xfermask(dev
->id
);
4095 * CFA Advanced TrueIDE timings are not allowed on a shared
4098 if (ata_dev_pair(dev
)) {
4099 /* No PIO5 or PIO6 */
4100 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4101 /* No MWDMA3 or MWDMA 4 */
4102 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4105 if (ata_dma_blacklisted(dev
)) {
4106 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4107 ata_dev_printk(dev
, KERN_WARNING
,
4108 "device is on DMA blacklist, disabling DMA\n");
4111 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4112 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4113 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4114 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4115 "other device, disabling DMA\n");
4118 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4119 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4121 if (ap
->ops
->mode_filter
)
4122 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4124 /* Apply cable rule here. Don't apply it early because when
4125 * we handle hot plug the cable type can itself change.
4126 * Check this last so that we know if the transfer rate was
4127 * solely limited by the cable.
4128 * Unknown or 80 wire cables reported host side are checked
4129 * drive side as well. Cases where we know a 40wire cable
4130 * is used safely for 80 are not checked here.
4132 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4133 /* UDMA/44 or higher would be available */
4134 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4135 (ata_drive_40wire(dev
->id
) &&
4136 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4137 ap
->cbl
== ATA_CBL_PATA80
))) {
4138 ata_dev_printk(dev
, KERN_WARNING
,
4139 "limited to UDMA/33 due to 40-wire cable\n");
4140 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4143 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4144 &dev
->mwdma_mask
, &dev
->udma_mask
);
4148 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4149 * @dev: Device to which command will be sent
4151 * Issue SET FEATURES - XFER MODE command to device @dev
4155 * PCI/etc. bus probe sem.
4158 * 0 on success, AC_ERR_* mask otherwise.
4161 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4163 struct ata_taskfile tf
;
4164 unsigned int err_mask
;
4166 /* set up set-features taskfile */
4167 DPRINTK("set features - xfer mode\n");
4169 /* Some controllers and ATAPI devices show flaky interrupt
4170 * behavior after setting xfer mode. Use polling instead.
4172 ata_tf_init(dev
, &tf
);
4173 tf
.command
= ATA_CMD_SET_FEATURES
;
4174 tf
.feature
= SETFEATURES_XFER
;
4175 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4176 tf
.protocol
= ATA_PROT_NODATA
;
4177 tf
.nsect
= dev
->xfer_mode
;
4179 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4181 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4185 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4186 * @dev: Device to which command will be sent
4187 * @enable: Whether to enable or disable the feature
4188 * @feature: The sector count represents the feature to set
4190 * Issue SET FEATURES - SATA FEATURES command to device @dev
4191 * on port @ap with sector count
4194 * PCI/etc. bus probe sem.
4197 * 0 on success, AC_ERR_* mask otherwise.
4199 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4202 struct ata_taskfile tf
;
4203 unsigned int err_mask
;
4205 /* set up set-features taskfile */
4206 DPRINTK("set features - SATA features\n");
4208 ata_tf_init(dev
, &tf
);
4209 tf
.command
= ATA_CMD_SET_FEATURES
;
4210 tf
.feature
= enable
;
4211 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4212 tf
.protocol
= ATA_PROT_NODATA
;
4215 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4217 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4222 * ata_dev_init_params - Issue INIT DEV PARAMS command
4223 * @dev: Device to which command will be sent
4224 * @heads: Number of heads (taskfile parameter)
4225 * @sectors: Number of sectors (taskfile parameter)
4228 * Kernel thread context (may sleep)
4231 * 0 on success, AC_ERR_* mask otherwise.
4233 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4234 u16 heads
, u16 sectors
)
4236 struct ata_taskfile tf
;
4237 unsigned int err_mask
;
4239 /* Number of sectors per track 1-255. Number of heads 1-16 */
4240 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4241 return AC_ERR_INVALID
;
4243 /* set up init dev params taskfile */
4244 DPRINTK("init dev params \n");
4246 ata_tf_init(dev
, &tf
);
4247 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4248 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4249 tf
.protocol
= ATA_PROT_NODATA
;
4251 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4253 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4254 /* A clean abort indicates an original or just out of spec drive
4255 and we should continue as we issue the setup based on the
4256 drive reported working geometry */
4257 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4260 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4265 * ata_sg_clean - Unmap DMA memory associated with command
4266 * @qc: Command containing DMA memory to be released
4268 * Unmap all mapped DMA memory associated with this command.
4271 * spin_lock_irqsave(host lock)
4273 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4275 struct ata_port
*ap
= qc
->ap
;
4276 struct scatterlist
*sg
= qc
->__sg
;
4277 int dir
= qc
->dma_dir
;
4278 void *pad_buf
= NULL
;
4280 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4281 WARN_ON(sg
== NULL
);
4283 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4284 WARN_ON(qc
->n_elem
> 1);
4286 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4288 /* if we padded the buffer out to 32-bit bound, and data
4289 * xfer direction is from-device, we must copy from the
4290 * pad buffer back into the supplied buffer
4292 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4293 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4295 if (qc
->flags
& ATA_QCFLAG_SG
) {
4297 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4298 /* restore last sg */
4299 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4301 struct scatterlist
*psg
= &qc
->pad_sgent
;
4302 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4303 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4304 kunmap_atomic(addr
, KM_IRQ0
);
4308 dma_unmap_single(ap
->dev
,
4309 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4312 sg
->length
+= qc
->pad_len
;
4314 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4315 pad_buf
, qc
->pad_len
);
4318 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4323 * ata_fill_sg - Fill PCI IDE PRD table
4324 * @qc: Metadata associated with taskfile to be transferred
4326 * Fill PCI IDE PRD (scatter-gather) table with segments
4327 * associated with the current disk command.
4330 * spin_lock_irqsave(host lock)
4333 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4335 struct ata_port
*ap
= qc
->ap
;
4336 struct scatterlist
*sg
;
4339 WARN_ON(qc
->__sg
== NULL
);
4340 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4343 ata_for_each_sg(sg
, qc
) {
4347 /* determine if physical DMA addr spans 64K boundary.
4348 * Note h/w doesn't support 64-bit, so we unconditionally
4349 * truncate dma_addr_t to u32.
4351 addr
= (u32
) sg_dma_address(sg
);
4352 sg_len
= sg_dma_len(sg
);
4355 offset
= addr
& 0xffff;
4357 if ((offset
+ sg_len
) > 0x10000)
4358 len
= 0x10000 - offset
;
4360 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4361 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4362 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4371 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4375 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4376 * @qc: Metadata associated with taskfile to be transferred
4378 * Fill PCI IDE PRD (scatter-gather) table with segments
4379 * associated with the current disk command. Perform the fill
4380 * so that we avoid writing any length 64K records for
4381 * controllers that don't follow the spec.
4384 * spin_lock_irqsave(host lock)
4387 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4389 struct ata_port
*ap
= qc
->ap
;
4390 struct scatterlist
*sg
;
4393 WARN_ON(qc
->__sg
== NULL
);
4394 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4397 ata_for_each_sg(sg
, qc
) {
4399 u32 sg_len
, len
, blen
;
4401 /* determine if physical DMA addr spans 64K boundary.
4402 * Note h/w doesn't support 64-bit, so we unconditionally
4403 * truncate dma_addr_t to u32.
4405 addr
= (u32
) sg_dma_address(sg
);
4406 sg_len
= sg_dma_len(sg
);
4409 offset
= addr
& 0xffff;
4411 if ((offset
+ sg_len
) > 0x10000)
4412 len
= 0x10000 - offset
;
4414 blen
= len
& 0xffff;
4415 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4417 /* Some PATA chipsets like the CS5530 can't
4418 cope with 0x0000 meaning 64K as the spec says */
4419 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4421 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4423 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4424 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4433 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4437 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4438 * @qc: Metadata associated with taskfile to check
4440 * Allow low-level driver to filter ATA PACKET commands, returning
4441 * a status indicating whether or not it is OK to use DMA for the
4442 * supplied PACKET command.
4445 * spin_lock_irqsave(host lock)
4447 * RETURNS: 0 when ATAPI DMA can be used
4450 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4452 struct ata_port
*ap
= qc
->ap
;
4454 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4455 * few ATAPI devices choke on such DMA requests.
4457 if (unlikely(qc
->nbytes
& 15))
4460 if (ap
->ops
->check_atapi_dma
)
4461 return ap
->ops
->check_atapi_dma(qc
);
4467 * ata_std_qc_defer - Check whether a qc needs to be deferred
4468 * @qc: ATA command in question
4470 * Non-NCQ commands cannot run with any other command, NCQ or
4471 * not. As upper layer only knows the queue depth, we are
4472 * responsible for maintaining exclusion. This function checks
4473 * whether a new command @qc can be issued.
4476 * spin_lock_irqsave(host lock)
4479 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4481 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4483 struct ata_link
*link
= qc
->dev
->link
;
4485 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4486 if (!ata_tag_valid(link
->active_tag
))
4489 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4493 return ATA_DEFER_LINK
;
4497 * ata_qc_prep - Prepare taskfile for submission
4498 * @qc: Metadata associated with taskfile to be prepared
4500 * Prepare ATA taskfile for submission.
4503 * spin_lock_irqsave(host lock)
4505 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4507 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4514 * ata_dumb_qc_prep - Prepare taskfile for submission
4515 * @qc: Metadata associated with taskfile to be prepared
4517 * Prepare ATA taskfile for submission.
4520 * spin_lock_irqsave(host lock)
4522 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4524 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4527 ata_fill_sg_dumb(qc
);
4530 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4533 * ata_sg_init_one - Associate command with memory buffer
4534 * @qc: Command to be associated
4535 * @buf: Memory buffer
4536 * @buflen: Length of memory buffer, in bytes.
4538 * Initialize the data-related elements of queued_cmd @qc
4539 * to point to a single memory buffer, @buf of byte length @buflen.
4542 * spin_lock_irqsave(host lock)
4545 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4547 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4549 qc
->__sg
= &qc
->sgent
;
4551 qc
->orig_n_elem
= 1;
4553 qc
->nbytes
= buflen
;
4554 qc
->cursg
= qc
->__sg
;
4556 sg_init_one(&qc
->sgent
, buf
, buflen
);
4560 * ata_sg_init - Associate command with scatter-gather table.
4561 * @qc: Command to be associated
4562 * @sg: Scatter-gather table.
4563 * @n_elem: Number of elements in s/g table.
4565 * Initialize the data-related elements of queued_cmd @qc
4566 * to point to a scatter-gather table @sg, containing @n_elem
4570 * spin_lock_irqsave(host lock)
4573 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4574 unsigned int n_elem
)
4576 qc
->flags
|= ATA_QCFLAG_SG
;
4578 qc
->n_elem
= n_elem
;
4579 qc
->orig_n_elem
= n_elem
;
4580 qc
->cursg
= qc
->__sg
;
4584 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4585 * @qc: Command with memory buffer to be mapped.
4587 * DMA-map the memory buffer associated with queued_cmd @qc.
4590 * spin_lock_irqsave(host lock)
4593 * Zero on success, negative on error.
4596 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4598 struct ata_port
*ap
= qc
->ap
;
4599 int dir
= qc
->dma_dir
;
4600 struct scatterlist
*sg
= qc
->__sg
;
4601 dma_addr_t dma_address
;
4604 /* we must lengthen transfers to end on a 32-bit boundary */
4605 qc
->pad_len
= sg
->length
& 3;
4607 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4608 struct scatterlist
*psg
= &qc
->pad_sgent
;
4610 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4612 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4614 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4615 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4618 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4619 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4621 sg
->length
-= qc
->pad_len
;
4622 if (sg
->length
== 0)
4625 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4626 sg
->length
, qc
->pad_len
);
4634 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4636 if (dma_mapping_error(dma_address
)) {
4638 sg
->length
+= qc
->pad_len
;
4642 sg_dma_address(sg
) = dma_address
;
4643 sg_dma_len(sg
) = sg
->length
;
4646 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4647 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4653 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4654 * @qc: Command with scatter-gather table to be mapped.
4656 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4659 * spin_lock_irqsave(host lock)
4662 * Zero on success, negative on error.
4666 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4668 struct ata_port
*ap
= qc
->ap
;
4669 struct scatterlist
*sg
= qc
->__sg
;
4670 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4671 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4673 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4674 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4676 /* we must lengthen transfers to end on a 32-bit boundary */
4677 qc
->pad_len
= lsg
->length
& 3;
4679 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4680 struct scatterlist
*psg
= &qc
->pad_sgent
;
4681 unsigned int offset
;
4683 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4685 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4688 * psg->page/offset are used to copy to-be-written
4689 * data in this function or read data in ata_sg_clean.
4691 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4692 sg_set_page(psg
, nth_page(sg_page(lsg
), offset
>> PAGE_SHIFT
));
4693 psg
->offset
= offset_in_page(offset
);
4695 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4696 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4697 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4698 kunmap_atomic(addr
, KM_IRQ0
);
4701 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4702 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4704 lsg
->length
-= qc
->pad_len
;
4705 if (lsg
->length
== 0)
4708 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4709 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4712 pre_n_elem
= qc
->n_elem
;
4713 if (trim_sg
&& pre_n_elem
)
4722 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4724 /* restore last sg */
4725 lsg
->length
+= qc
->pad_len
;
4729 DPRINTK("%d sg elements mapped\n", n_elem
);
4732 qc
->n_elem
= n_elem
;
4738 * swap_buf_le16 - swap halves of 16-bit words in place
4739 * @buf: Buffer to swap
4740 * @buf_words: Number of 16-bit words in buffer.
4742 * Swap halves of 16-bit words if needed to convert from
4743 * little-endian byte order to native cpu byte order, or
4747 * Inherited from caller.
4749 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4754 for (i
= 0; i
< buf_words
; i
++)
4755 buf
[i
] = le16_to_cpu(buf
[i
]);
4756 #endif /* __BIG_ENDIAN */
4760 * ata_data_xfer - Transfer data by PIO
4761 * @adev: device to target
4763 * @buflen: buffer length
4764 * @write_data: read/write
4766 * Transfer data from/to the device data register by PIO.
4769 * Inherited from caller.
4771 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4772 unsigned int buflen
, int write_data
)
4774 struct ata_port
*ap
= adev
->link
->ap
;
4775 unsigned int words
= buflen
>> 1;
4777 /* Transfer multiple of 2 bytes */
4779 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4781 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4783 /* Transfer trailing 1 byte, if any. */
4784 if (unlikely(buflen
& 0x01)) {
4785 u16 align_buf
[1] = { 0 };
4786 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4789 memcpy(align_buf
, trailing_buf
, 1);
4790 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4792 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4793 memcpy(trailing_buf
, align_buf
, 1);
4799 * ata_data_xfer_noirq - Transfer data by PIO
4800 * @adev: device to target
4802 * @buflen: buffer length
4803 * @write_data: read/write
4805 * Transfer data from/to the device data register by PIO. Do the
4806 * transfer with interrupts disabled.
4809 * Inherited from caller.
4811 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4812 unsigned int buflen
, int write_data
)
4814 unsigned long flags
;
4815 local_irq_save(flags
);
4816 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4817 local_irq_restore(flags
);
4822 * ata_pio_sector - Transfer a sector of data.
4823 * @qc: Command on going
4825 * Transfer qc->sect_size bytes of data from/to the ATA device.
4828 * Inherited from caller.
4831 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4833 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4834 struct ata_port
*ap
= qc
->ap
;
4836 unsigned int offset
;
4839 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4840 ap
->hsm_task_state
= HSM_ST_LAST
;
4842 page
= sg_page(qc
->cursg
);
4843 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
4845 /* get the current page and offset */
4846 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4847 offset
%= PAGE_SIZE
;
4849 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4851 if (PageHighMem(page
)) {
4852 unsigned long flags
;
4854 /* FIXME: use a bounce buffer */
4855 local_irq_save(flags
);
4856 buf
= kmap_atomic(page
, KM_IRQ0
);
4858 /* do the actual data transfer */
4859 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4861 kunmap_atomic(buf
, KM_IRQ0
);
4862 local_irq_restore(flags
);
4864 buf
= page_address(page
);
4865 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4868 qc
->curbytes
+= qc
->sect_size
;
4869 qc
->cursg_ofs
+= qc
->sect_size
;
4871 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
4872 qc
->cursg
= sg_next(qc
->cursg
);
4878 * ata_pio_sectors - Transfer one or many sectors.
4879 * @qc: Command on going
4881 * Transfer one or many sectors of data from/to the
4882 * ATA device for the DRQ request.
4885 * Inherited from caller.
4888 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4890 if (is_multi_taskfile(&qc
->tf
)) {
4891 /* READ/WRITE MULTIPLE */
4894 WARN_ON(qc
->dev
->multi_count
== 0);
4896 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4897 qc
->dev
->multi_count
);
4903 ata_altstatus(qc
->ap
); /* flush */
4907 * atapi_send_cdb - Write CDB bytes to hardware
4908 * @ap: Port to which ATAPI device is attached.
4909 * @qc: Taskfile currently active
4911 * When device has indicated its readiness to accept
4912 * a CDB, this function is called. Send the CDB.
4918 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4921 DPRINTK("send cdb\n");
4922 WARN_ON(qc
->dev
->cdb_len
< 12);
4924 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4925 ata_altstatus(ap
); /* flush */
4927 switch (qc
->tf
.protocol
) {
4928 case ATA_PROT_ATAPI
:
4929 ap
->hsm_task_state
= HSM_ST
;
4931 case ATA_PROT_ATAPI_NODATA
:
4932 ap
->hsm_task_state
= HSM_ST_LAST
;
4934 case ATA_PROT_ATAPI_DMA
:
4935 ap
->hsm_task_state
= HSM_ST_LAST
;
4936 /* initiate bmdma */
4937 ap
->ops
->bmdma_start(qc
);
4943 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4944 * @qc: Command on going
4945 * @bytes: number of bytes
4947 * Transfer Transfer data from/to the ATAPI device.
4950 * Inherited from caller.
4954 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4956 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4957 struct scatterlist
*sg
= qc
->__sg
;
4958 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4959 struct ata_port
*ap
= qc
->ap
;
4962 unsigned int offset
, count
;
4965 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4966 ap
->hsm_task_state
= HSM_ST_LAST
;
4969 if (unlikely(no_more_sg
)) {
4971 * The end of qc->sg is reached and the device expects
4972 * more data to transfer. In order not to overrun qc->sg
4973 * and fulfill length specified in the byte count register,
4974 * - for read case, discard trailing data from the device
4975 * - for write case, padding zero data to the device
4977 u16 pad_buf
[1] = { 0 };
4978 unsigned int words
= bytes
>> 1;
4981 if (words
) /* warning if bytes > 1 */
4982 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4983 "%u bytes trailing data\n", bytes
);
4985 for (i
= 0; i
< words
; i
++)
4986 ap
->ops
->data_xfer(qc
->dev
, (unsigned char *)pad_buf
, 2, do_write
);
4988 ap
->hsm_task_state
= HSM_ST_LAST
;
4995 offset
= sg
->offset
+ qc
->cursg_ofs
;
4997 /* get the current page and offset */
4998 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4999 offset
%= PAGE_SIZE
;
5001 /* don't overrun current sg */
5002 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5004 /* don't cross page boundaries */
5005 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5007 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5009 if (PageHighMem(page
)) {
5010 unsigned long flags
;
5012 /* FIXME: use bounce buffer */
5013 local_irq_save(flags
);
5014 buf
= kmap_atomic(page
, KM_IRQ0
);
5016 /* do the actual data transfer */
5017 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5019 kunmap_atomic(buf
, KM_IRQ0
);
5020 local_irq_restore(flags
);
5022 buf
= page_address(page
);
5023 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5027 qc
->curbytes
+= count
;
5028 qc
->cursg_ofs
+= count
;
5030 if (qc
->cursg_ofs
== sg
->length
) {
5031 if (qc
->cursg
== lsg
)
5034 qc
->cursg
= sg_next(qc
->cursg
);
5043 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5044 * @qc: Command on going
5046 * Transfer Transfer data from/to the ATAPI device.
5049 * Inherited from caller.
5052 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5054 struct ata_port
*ap
= qc
->ap
;
5055 struct ata_device
*dev
= qc
->dev
;
5056 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5057 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5059 /* Abuse qc->result_tf for temp storage of intermediate TF
5060 * here to save some kernel stack usage.
5061 * For normal completion, qc->result_tf is not relevant. For
5062 * error, qc->result_tf is later overwritten by ata_qc_complete().
5063 * So, the correctness of qc->result_tf is not affected.
5065 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5066 ireason
= qc
->result_tf
.nsect
;
5067 bc_lo
= qc
->result_tf
.lbam
;
5068 bc_hi
= qc
->result_tf
.lbah
;
5069 bytes
= (bc_hi
<< 8) | bc_lo
;
5071 /* shall be cleared to zero, indicating xfer of data */
5072 if (ireason
& (1 << 0))
5075 /* make sure transfer direction matches expected */
5076 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5077 if (do_write
!= i_write
)
5080 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5082 __atapi_pio_bytes(qc
, bytes
);
5083 ata_altstatus(ap
); /* flush */
5088 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5089 qc
->err_mask
|= AC_ERR_HSM
;
5090 ap
->hsm_task_state
= HSM_ST_ERR
;
5094 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5095 * @ap: the target ata_port
5099 * 1 if ok in workqueue, 0 otherwise.
5102 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5104 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5107 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5108 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5109 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5112 if (is_atapi_taskfile(&qc
->tf
) &&
5113 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5121 * ata_hsm_qc_complete - finish a qc running on standard HSM
5122 * @qc: Command to complete
5123 * @in_wq: 1 if called from workqueue, 0 otherwise
5125 * Finish @qc which is running on standard HSM.
5128 * If @in_wq is zero, spin_lock_irqsave(host lock).
5129 * Otherwise, none on entry and grabs host lock.
5131 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5133 struct ata_port
*ap
= qc
->ap
;
5134 unsigned long flags
;
5136 if (ap
->ops
->error_handler
) {
5138 spin_lock_irqsave(ap
->lock
, flags
);
5140 /* EH might have kicked in while host lock is
5143 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5145 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5146 ap
->ops
->irq_on(ap
);
5147 ata_qc_complete(qc
);
5149 ata_port_freeze(ap
);
5152 spin_unlock_irqrestore(ap
->lock
, flags
);
5154 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5155 ata_qc_complete(qc
);
5157 ata_port_freeze(ap
);
5161 spin_lock_irqsave(ap
->lock
, flags
);
5162 ap
->ops
->irq_on(ap
);
5163 ata_qc_complete(qc
);
5164 spin_unlock_irqrestore(ap
->lock
, flags
);
5166 ata_qc_complete(qc
);
5171 * ata_hsm_move - move the HSM to the next state.
5172 * @ap: the target ata_port
5174 * @status: current device status
5175 * @in_wq: 1 if called from workqueue, 0 otherwise
5178 * 1 when poll next status needed, 0 otherwise.
5180 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5181 u8 status
, int in_wq
)
5183 unsigned long flags
= 0;
5186 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5188 /* Make sure ata_qc_issue_prot() does not throw things
5189 * like DMA polling into the workqueue. Notice that
5190 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5192 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5195 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5196 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5198 switch (ap
->hsm_task_state
) {
5200 /* Send first data block or PACKET CDB */
5202 /* If polling, we will stay in the work queue after
5203 * sending the data. Otherwise, interrupt handler
5204 * takes over after sending the data.
5206 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5208 /* check device status */
5209 if (unlikely((status
& ATA_DRQ
) == 0)) {
5210 /* handle BSY=0, DRQ=0 as error */
5211 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5212 /* device stops HSM for abort/error */
5213 qc
->err_mask
|= AC_ERR_DEV
;
5215 /* HSM violation. Let EH handle this */
5216 qc
->err_mask
|= AC_ERR_HSM
;
5218 ap
->hsm_task_state
= HSM_ST_ERR
;
5222 /* Device should not ask for data transfer (DRQ=1)
5223 * when it finds something wrong.
5224 * We ignore DRQ here and stop the HSM by
5225 * changing hsm_task_state to HSM_ST_ERR and
5226 * let the EH abort the command or reset the device.
5228 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5229 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5230 "error, dev_stat 0x%X\n", status
);
5231 qc
->err_mask
|= AC_ERR_HSM
;
5232 ap
->hsm_task_state
= HSM_ST_ERR
;
5236 /* Send the CDB (atapi) or the first data block (ata pio out).
5237 * During the state transition, interrupt handler shouldn't
5238 * be invoked before the data transfer is complete and
5239 * hsm_task_state is changed. Hence, the following locking.
5242 spin_lock_irqsave(ap
->lock
, flags
);
5244 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5245 /* PIO data out protocol.
5246 * send first data block.
5249 /* ata_pio_sectors() might change the state
5250 * to HSM_ST_LAST. so, the state is changed here
5251 * before ata_pio_sectors().
5253 ap
->hsm_task_state
= HSM_ST
;
5254 ata_pio_sectors(qc
);
5257 atapi_send_cdb(ap
, qc
);
5260 spin_unlock_irqrestore(ap
->lock
, flags
);
5262 /* if polling, ata_pio_task() handles the rest.
5263 * otherwise, interrupt handler takes over from here.
5268 /* complete command or read/write the data register */
5269 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5270 /* ATAPI PIO protocol */
5271 if ((status
& ATA_DRQ
) == 0) {
5272 /* No more data to transfer or device error.
5273 * Device error will be tagged in HSM_ST_LAST.
5275 ap
->hsm_task_state
= HSM_ST_LAST
;
5279 /* Device should not ask for data transfer (DRQ=1)
5280 * when it finds something wrong.
5281 * We ignore DRQ here and stop the HSM by
5282 * changing hsm_task_state to HSM_ST_ERR and
5283 * let the EH abort the command or reset the device.
5285 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5286 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5287 "device error, dev_stat 0x%X\n",
5289 qc
->err_mask
|= AC_ERR_HSM
;
5290 ap
->hsm_task_state
= HSM_ST_ERR
;
5294 atapi_pio_bytes(qc
);
5296 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5297 /* bad ireason reported by device */
5301 /* ATA PIO protocol */
5302 if (unlikely((status
& ATA_DRQ
) == 0)) {
5303 /* handle BSY=0, DRQ=0 as error */
5304 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5305 /* device stops HSM for abort/error */
5306 qc
->err_mask
|= AC_ERR_DEV
;
5308 /* HSM violation. Let EH handle this.
5309 * Phantom devices also trigger this
5310 * condition. Mark hint.
5312 qc
->err_mask
|= AC_ERR_HSM
|
5315 ap
->hsm_task_state
= HSM_ST_ERR
;
5319 /* For PIO reads, some devices may ask for
5320 * data transfer (DRQ=1) alone with ERR=1.
5321 * We respect DRQ here and transfer one
5322 * block of junk data before changing the
5323 * hsm_task_state to HSM_ST_ERR.
5325 * For PIO writes, ERR=1 DRQ=1 doesn't make
5326 * sense since the data block has been
5327 * transferred to the device.
5329 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5330 /* data might be corrputed */
5331 qc
->err_mask
|= AC_ERR_DEV
;
5333 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5334 ata_pio_sectors(qc
);
5335 status
= ata_wait_idle(ap
);
5338 if (status
& (ATA_BUSY
| ATA_DRQ
))
5339 qc
->err_mask
|= AC_ERR_HSM
;
5341 /* ata_pio_sectors() might change the
5342 * state to HSM_ST_LAST. so, the state
5343 * is changed after ata_pio_sectors().
5345 ap
->hsm_task_state
= HSM_ST_ERR
;
5349 ata_pio_sectors(qc
);
5351 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5352 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5354 status
= ata_wait_idle(ap
);
5363 if (unlikely(!ata_ok(status
))) {
5364 qc
->err_mask
|= __ac_err_mask(status
);
5365 ap
->hsm_task_state
= HSM_ST_ERR
;
5369 /* no more data to transfer */
5370 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5371 ap
->print_id
, qc
->dev
->devno
, status
);
5373 WARN_ON(qc
->err_mask
);
5375 ap
->hsm_task_state
= HSM_ST_IDLE
;
5377 /* complete taskfile transaction */
5378 ata_hsm_qc_complete(qc
, in_wq
);
5384 /* make sure qc->err_mask is available to
5385 * know what's wrong and recover
5387 WARN_ON(qc
->err_mask
== 0);
5389 ap
->hsm_task_state
= HSM_ST_IDLE
;
5391 /* complete taskfile transaction */
5392 ata_hsm_qc_complete(qc
, in_wq
);
5404 static void ata_pio_task(struct work_struct
*work
)
5406 struct ata_port
*ap
=
5407 container_of(work
, struct ata_port
, port_task
.work
);
5408 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5413 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5416 * This is purely heuristic. This is a fast path.
5417 * Sometimes when we enter, BSY will be cleared in
5418 * a chk-status or two. If not, the drive is probably seeking
5419 * or something. Snooze for a couple msecs, then
5420 * chk-status again. If still busy, queue delayed work.
5422 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5423 if (status
& ATA_BUSY
) {
5425 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5426 if (status
& ATA_BUSY
) {
5427 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5433 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5435 /* another command or interrupt handler
5436 * may be running at this point.
5443 * ata_qc_new - Request an available ATA command, for queueing
5444 * @ap: Port associated with device @dev
5445 * @dev: Device from whom we request an available command structure
5451 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5453 struct ata_queued_cmd
*qc
= NULL
;
5456 /* no command while frozen */
5457 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5460 /* the last tag is reserved for internal command. */
5461 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5462 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5463 qc
= __ata_qc_from_tag(ap
, i
);
5474 * ata_qc_new_init - Request an available ATA command, and initialize it
5475 * @dev: Device from whom we request an available command structure
5481 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5483 struct ata_port
*ap
= dev
->link
->ap
;
5484 struct ata_queued_cmd
*qc
;
5486 qc
= ata_qc_new(ap
);
5499 * ata_qc_free - free unused ata_queued_cmd
5500 * @qc: Command to complete
5502 * Designed to free unused ata_queued_cmd object
5503 * in case something prevents using it.
5506 * spin_lock_irqsave(host lock)
5508 void ata_qc_free(struct ata_queued_cmd
*qc
)
5510 struct ata_port
*ap
= qc
->ap
;
5513 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5517 if (likely(ata_tag_valid(tag
))) {
5518 qc
->tag
= ATA_TAG_POISON
;
5519 clear_bit(tag
, &ap
->qc_allocated
);
5523 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5525 struct ata_port
*ap
= qc
->ap
;
5526 struct ata_link
*link
= qc
->dev
->link
;
5528 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5529 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5531 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5534 /* command should be marked inactive atomically with qc completion */
5535 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5536 link
->sactive
&= ~(1 << qc
->tag
);
5538 ap
->nr_active_links
--;
5540 link
->active_tag
= ATA_TAG_POISON
;
5541 ap
->nr_active_links
--;
5544 /* clear exclusive status */
5545 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5546 ap
->excl_link
== link
))
5547 ap
->excl_link
= NULL
;
5549 /* atapi: mark qc as inactive to prevent the interrupt handler
5550 * from completing the command twice later, before the error handler
5551 * is called. (when rc != 0 and atapi request sense is needed)
5553 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5554 ap
->qc_active
&= ~(1 << qc
->tag
);
5556 /* call completion callback */
5557 qc
->complete_fn(qc
);
5560 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5562 struct ata_port
*ap
= qc
->ap
;
5564 qc
->result_tf
.flags
= qc
->tf
.flags
;
5565 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5569 * ata_qc_complete - Complete an active ATA command
5570 * @qc: Command to complete
5571 * @err_mask: ATA Status register contents
5573 * Indicate to the mid and upper layers that an ATA
5574 * command has completed, with either an ok or not-ok status.
5577 * spin_lock_irqsave(host lock)
5579 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5581 struct ata_port
*ap
= qc
->ap
;
5583 /* XXX: New EH and old EH use different mechanisms to
5584 * synchronize EH with regular execution path.
5586 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5587 * Normal execution path is responsible for not accessing a
5588 * failed qc. libata core enforces the rule by returning NULL
5589 * from ata_qc_from_tag() for failed qcs.
5591 * Old EH depends on ata_qc_complete() nullifying completion
5592 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5593 * not synchronize with interrupt handler. Only PIO task is
5596 if (ap
->ops
->error_handler
) {
5597 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5599 if (unlikely(qc
->err_mask
))
5600 qc
->flags
|= ATA_QCFLAG_FAILED
;
5602 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5603 if (!ata_tag_internal(qc
->tag
)) {
5604 /* always fill result TF for failed qc */
5606 ata_qc_schedule_eh(qc
);
5611 /* read result TF if requested */
5612 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5615 __ata_qc_complete(qc
);
5617 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5620 /* read result TF if failed or requested */
5621 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5624 __ata_qc_complete(qc
);
5629 * ata_qc_complete_multiple - Complete multiple qcs successfully
5630 * @ap: port in question
5631 * @qc_active: new qc_active mask
5632 * @finish_qc: LLDD callback invoked before completing a qc
5634 * Complete in-flight commands. This functions is meant to be
5635 * called from low-level driver's interrupt routine to complete
5636 * requests normally. ap->qc_active and @qc_active is compared
5637 * and commands are completed accordingly.
5640 * spin_lock_irqsave(host lock)
5643 * Number of completed commands on success, -errno otherwise.
5645 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5646 void (*finish_qc
)(struct ata_queued_cmd
*))
5652 done_mask
= ap
->qc_active
^ qc_active
;
5654 if (unlikely(done_mask
& qc_active
)) {
5655 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5656 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5660 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5661 struct ata_queued_cmd
*qc
;
5663 if (!(done_mask
& (1 << i
)))
5666 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5669 ata_qc_complete(qc
);
5677 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5679 struct ata_port
*ap
= qc
->ap
;
5681 switch (qc
->tf
.protocol
) {
5684 case ATA_PROT_ATAPI_DMA
:
5687 case ATA_PROT_ATAPI
:
5689 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5702 * ata_qc_issue - issue taskfile to device
5703 * @qc: command to issue to device
5705 * Prepare an ATA command to submission to device.
5706 * This includes mapping the data into a DMA-able
5707 * area, filling in the S/G table, and finally
5708 * writing the taskfile to hardware, starting the command.
5711 * spin_lock_irqsave(host lock)
5713 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5715 struct ata_port
*ap
= qc
->ap
;
5716 struct ata_link
*link
= qc
->dev
->link
;
5718 /* Make sure only one non-NCQ command is outstanding. The
5719 * check is skipped for old EH because it reuses active qc to
5720 * request ATAPI sense.
5722 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5724 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5725 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5728 ap
->nr_active_links
++;
5729 link
->sactive
|= 1 << qc
->tag
;
5731 WARN_ON(link
->sactive
);
5733 ap
->nr_active_links
++;
5734 link
->active_tag
= qc
->tag
;
5737 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5738 ap
->qc_active
|= 1 << qc
->tag
;
5740 if (ata_should_dma_map(qc
)) {
5741 if (qc
->flags
& ATA_QCFLAG_SG
) {
5742 if (ata_sg_setup(qc
))
5744 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5745 if (ata_sg_setup_one(qc
))
5749 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5752 ap
->ops
->qc_prep(qc
);
5754 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5755 if (unlikely(qc
->err_mask
))
5760 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5761 qc
->err_mask
|= AC_ERR_SYSTEM
;
5763 ata_qc_complete(qc
);
5767 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5768 * @qc: command to issue to device
5770 * Using various libata functions and hooks, this function
5771 * starts an ATA command. ATA commands are grouped into
5772 * classes called "protocols", and issuing each type of protocol
5773 * is slightly different.
5775 * May be used as the qc_issue() entry in ata_port_operations.
5778 * spin_lock_irqsave(host lock)
5781 * Zero on success, AC_ERR_* mask on failure
5784 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5786 struct ata_port
*ap
= qc
->ap
;
5788 /* Use polling pio if the LLD doesn't handle
5789 * interrupt driven pio and atapi CDB interrupt.
5791 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5792 switch (qc
->tf
.protocol
) {
5794 case ATA_PROT_NODATA
:
5795 case ATA_PROT_ATAPI
:
5796 case ATA_PROT_ATAPI_NODATA
:
5797 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5799 case ATA_PROT_ATAPI_DMA
:
5800 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5801 /* see ata_dma_blacklisted() */
5809 /* select the device */
5810 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5812 /* start the command */
5813 switch (qc
->tf
.protocol
) {
5814 case ATA_PROT_NODATA
:
5815 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5816 ata_qc_set_polling(qc
);
5818 ata_tf_to_host(ap
, &qc
->tf
);
5819 ap
->hsm_task_state
= HSM_ST_LAST
;
5821 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5822 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5827 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5829 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5830 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5831 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5832 ap
->hsm_task_state
= HSM_ST_LAST
;
5836 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5837 ata_qc_set_polling(qc
);
5839 ata_tf_to_host(ap
, &qc
->tf
);
5841 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5842 /* PIO data out protocol */
5843 ap
->hsm_task_state
= HSM_ST_FIRST
;
5844 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5846 /* always send first data block using
5847 * the ata_pio_task() codepath.
5850 /* PIO data in protocol */
5851 ap
->hsm_task_state
= HSM_ST
;
5853 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5854 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5856 /* if polling, ata_pio_task() handles the rest.
5857 * otherwise, interrupt handler takes over from here.
5863 case ATA_PROT_ATAPI
:
5864 case ATA_PROT_ATAPI_NODATA
:
5865 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5866 ata_qc_set_polling(qc
);
5868 ata_tf_to_host(ap
, &qc
->tf
);
5870 ap
->hsm_task_state
= HSM_ST_FIRST
;
5872 /* send cdb by polling if no cdb interrupt */
5873 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5874 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5875 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5878 case ATA_PROT_ATAPI_DMA
:
5879 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5881 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5882 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5883 ap
->hsm_task_state
= HSM_ST_FIRST
;
5885 /* send cdb by polling if no cdb interrupt */
5886 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5887 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5892 return AC_ERR_SYSTEM
;
5899 * ata_host_intr - Handle host interrupt for given (port, task)
5900 * @ap: Port on which interrupt arrived (possibly...)
5901 * @qc: Taskfile currently active in engine
5903 * Handle host interrupt for given queued command. Currently,
5904 * only DMA interrupts are handled. All other commands are
5905 * handled via polling with interrupts disabled (nIEN bit).
5908 * spin_lock_irqsave(host lock)
5911 * One if interrupt was handled, zero if not (shared irq).
5914 inline unsigned int ata_host_intr(struct ata_port
*ap
,
5915 struct ata_queued_cmd
*qc
)
5917 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5918 u8 status
, host_stat
= 0;
5920 VPRINTK("ata%u: protocol %d task_state %d\n",
5921 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5923 /* Check whether we are expecting interrupt in this state */
5924 switch (ap
->hsm_task_state
) {
5926 /* Some pre-ATAPI-4 devices assert INTRQ
5927 * at this state when ready to receive CDB.
5930 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5931 * The flag was turned on only for atapi devices.
5932 * No need to check is_atapi_taskfile(&qc->tf) again.
5934 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5938 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5939 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5940 /* check status of DMA engine */
5941 host_stat
= ap
->ops
->bmdma_status(ap
);
5942 VPRINTK("ata%u: host_stat 0x%X\n",
5943 ap
->print_id
, host_stat
);
5945 /* if it's not our irq... */
5946 if (!(host_stat
& ATA_DMA_INTR
))
5949 /* before we do anything else, clear DMA-Start bit */
5950 ap
->ops
->bmdma_stop(qc
);
5952 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5953 /* error when transfering data to/from memory */
5954 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5955 ap
->hsm_task_state
= HSM_ST_ERR
;
5965 /* check altstatus */
5966 status
= ata_altstatus(ap
);
5967 if (status
& ATA_BUSY
)
5970 /* check main status, clearing INTRQ */
5971 status
= ata_chk_status(ap
);
5972 if (unlikely(status
& ATA_BUSY
))
5975 /* ack bmdma irq events */
5976 ap
->ops
->irq_clear(ap
);
5978 ata_hsm_move(ap
, qc
, status
, 0);
5980 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5981 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5982 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5984 return 1; /* irq handled */
5987 ap
->stats
.idle_irq
++;
5990 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5992 ap
->ops
->irq_clear(ap
);
5993 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5997 return 0; /* irq not handled */
6001 * ata_interrupt - Default ATA host interrupt handler
6002 * @irq: irq line (unused)
6003 * @dev_instance: pointer to our ata_host information structure
6005 * Default interrupt handler for PCI IDE devices. Calls
6006 * ata_host_intr() for each port that is not disabled.
6009 * Obtains host lock during operation.
6012 * IRQ_NONE or IRQ_HANDLED.
6015 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6017 struct ata_host
*host
= dev_instance
;
6019 unsigned int handled
= 0;
6020 unsigned long flags
;
6022 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6023 spin_lock_irqsave(&host
->lock
, flags
);
6025 for (i
= 0; i
< host
->n_ports
; i
++) {
6026 struct ata_port
*ap
;
6028 ap
= host
->ports
[i
];
6030 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6031 struct ata_queued_cmd
*qc
;
6033 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6034 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6035 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6036 handled
|= ata_host_intr(ap
, qc
);
6040 spin_unlock_irqrestore(&host
->lock
, flags
);
6042 return IRQ_RETVAL(handled
);
6046 * sata_scr_valid - test whether SCRs are accessible
6047 * @link: ATA link to test SCR accessibility for
6049 * Test whether SCRs are accessible for @link.
6055 * 1 if SCRs are accessible, 0 otherwise.
6057 int sata_scr_valid(struct ata_link
*link
)
6059 struct ata_port
*ap
= link
->ap
;
6061 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6065 * sata_scr_read - read SCR register of the specified port
6066 * @link: ATA link to read SCR for
6068 * @val: Place to store read value
6070 * Read SCR register @reg of @link into *@val. This function is
6071 * guaranteed to succeed if @link is ap->link, the cable type of
6072 * the port is SATA and the port implements ->scr_read.
6075 * None if @link is ap->link. Kernel thread context otherwise.
6078 * 0 on success, negative errno on failure.
6080 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6082 if (ata_is_host_link(link
)) {
6083 struct ata_port
*ap
= link
->ap
;
6085 if (sata_scr_valid(link
))
6086 return ap
->ops
->scr_read(ap
, reg
, val
);
6090 return sata_pmp_scr_read(link
, reg
, val
);
6094 * sata_scr_write - write SCR register of the specified port
6095 * @link: ATA link to write SCR for
6096 * @reg: SCR to write
6097 * @val: value to write
6099 * Write @val to SCR register @reg of @link. This function is
6100 * guaranteed to succeed if @link is ap->link, the cable type of
6101 * the port is SATA and the port implements ->scr_read.
6104 * None if @link is ap->link. Kernel thread context otherwise.
6107 * 0 on success, negative errno on failure.
6109 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6111 if (ata_is_host_link(link
)) {
6112 struct ata_port
*ap
= link
->ap
;
6114 if (sata_scr_valid(link
))
6115 return ap
->ops
->scr_write(ap
, reg
, val
);
6119 return sata_pmp_scr_write(link
, reg
, val
);
6123 * sata_scr_write_flush - write SCR register of the specified port and flush
6124 * @link: ATA link to write SCR for
6125 * @reg: SCR to write
6126 * @val: value to write
6128 * This function is identical to sata_scr_write() except that this
6129 * function performs flush after writing to the register.
6132 * None if @link is ap->link. Kernel thread context otherwise.
6135 * 0 on success, negative errno on failure.
6137 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6139 if (ata_is_host_link(link
)) {
6140 struct ata_port
*ap
= link
->ap
;
6143 if (sata_scr_valid(link
)) {
6144 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6146 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6152 return sata_pmp_scr_write(link
, reg
, val
);
6156 * ata_link_online - test whether the given link is online
6157 * @link: ATA link to test
6159 * Test whether @link is online. Note that this function returns
6160 * 0 if online status of @link cannot be obtained, so
6161 * ata_link_online(link) != !ata_link_offline(link).
6167 * 1 if the port online status is available and online.
6169 int ata_link_online(struct ata_link
*link
)
6173 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6174 (sstatus
& 0xf) == 0x3)
6180 * ata_link_offline - test whether the given link is offline
6181 * @link: ATA link to test
6183 * Test whether @link is offline. Note that this function
6184 * returns 0 if offline status of @link cannot be obtained, so
6185 * ata_link_online(link) != !ata_link_offline(link).
6191 * 1 if the port offline status is available and offline.
6193 int ata_link_offline(struct ata_link
*link
)
6197 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6198 (sstatus
& 0xf) != 0x3)
6203 int ata_flush_cache(struct ata_device
*dev
)
6205 unsigned int err_mask
;
6208 if (!ata_try_flush_cache(dev
))
6211 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6212 cmd
= ATA_CMD_FLUSH_EXT
;
6214 cmd
= ATA_CMD_FLUSH
;
6216 /* This is wrong. On a failed flush we get back the LBA of the lost
6217 sector and we should (assuming it wasn't aborted as unknown) issue
6218 a further flush command to continue the writeback until it
6220 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6222 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6230 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6231 unsigned int action
, unsigned int ehi_flags
,
6234 unsigned long flags
;
6237 for (i
= 0; i
< host
->n_ports
; i
++) {
6238 struct ata_port
*ap
= host
->ports
[i
];
6239 struct ata_link
*link
;
6241 /* Previous resume operation might still be in
6242 * progress. Wait for PM_PENDING to clear.
6244 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6245 ata_port_wait_eh(ap
);
6246 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6249 /* request PM ops to EH */
6250 spin_lock_irqsave(ap
->lock
, flags
);
6255 ap
->pm_result
= &rc
;
6258 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6259 __ata_port_for_each_link(link
, ap
) {
6260 link
->eh_info
.action
|= action
;
6261 link
->eh_info
.flags
|= ehi_flags
;
6264 ata_port_schedule_eh(ap
);
6266 spin_unlock_irqrestore(ap
->lock
, flags
);
6268 /* wait and check result */
6270 ata_port_wait_eh(ap
);
6271 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6281 * ata_host_suspend - suspend host
6282 * @host: host to suspend
6285 * Suspend @host. Actual operation is performed by EH. This
6286 * function requests EH to perform PM operations and waits for EH
6290 * Kernel thread context (may sleep).
6293 * 0 on success, -errno on failure.
6295 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6299 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6301 host
->dev
->power
.power_state
= mesg
;
6306 * ata_host_resume - resume host
6307 * @host: host to resume
6309 * Resume @host. Actual operation is performed by EH. This
6310 * function requests EH to perform PM operations and returns.
6311 * Note that all resume operations are performed parallely.
6314 * Kernel thread context (may sleep).
6316 void ata_host_resume(struct ata_host
*host
)
6318 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6319 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6320 host
->dev
->power
.power_state
= PMSG_ON
;
6325 * ata_port_start - Set port up for dma.
6326 * @ap: Port to initialize
6328 * Called just after data structures for each port are
6329 * initialized. Allocates space for PRD table.
6331 * May be used as the port_start() entry in ata_port_operations.
6334 * Inherited from caller.
6336 int ata_port_start(struct ata_port
*ap
)
6338 struct device
*dev
= ap
->dev
;
6341 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6346 rc
= ata_pad_alloc(ap
, dev
);
6350 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6351 (unsigned long long)ap
->prd_dma
);
6356 * ata_dev_init - Initialize an ata_device structure
6357 * @dev: Device structure to initialize
6359 * Initialize @dev in preparation for probing.
6362 * Inherited from caller.
6364 void ata_dev_init(struct ata_device
*dev
)
6366 struct ata_link
*link
= dev
->link
;
6367 struct ata_port
*ap
= link
->ap
;
6368 unsigned long flags
;
6370 /* SATA spd limit is bound to the first device */
6371 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6374 /* High bits of dev->flags are used to record warm plug
6375 * requests which occur asynchronously. Synchronize using
6378 spin_lock_irqsave(ap
->lock
, flags
);
6379 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6381 spin_unlock_irqrestore(ap
->lock
, flags
);
6383 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6384 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6385 dev
->pio_mask
= UINT_MAX
;
6386 dev
->mwdma_mask
= UINT_MAX
;
6387 dev
->udma_mask
= UINT_MAX
;
6391 * ata_link_init - Initialize an ata_link structure
6392 * @ap: ATA port link is attached to
6393 * @link: Link structure to initialize
6394 * @pmp: Port multiplier port number
6399 * Kernel thread context (may sleep)
6401 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6405 /* clear everything except for devices */
6406 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6410 link
->active_tag
= ATA_TAG_POISON
;
6411 link
->hw_sata_spd_limit
= UINT_MAX
;
6413 /* can't use iterator, ap isn't initialized yet */
6414 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6415 struct ata_device
*dev
= &link
->device
[i
];
6418 dev
->devno
= dev
- link
->device
;
6424 * sata_link_init_spd - Initialize link->sata_spd_limit
6425 * @link: Link to configure sata_spd_limit for
6427 * Initialize @link->[hw_]sata_spd_limit to the currently
6431 * Kernel thread context (may sleep).
6434 * 0 on success, -errno on failure.
6436 int sata_link_init_spd(struct ata_link
*link
)
6441 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6445 spd
= (scontrol
>> 4) & 0xf;
6447 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6449 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6455 * ata_port_alloc - allocate and initialize basic ATA port resources
6456 * @host: ATA host this allocated port belongs to
6458 * Allocate and initialize basic ATA port resources.
6461 * Allocate ATA port on success, NULL on failure.
6464 * Inherited from calling layer (may sleep).
6466 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6468 struct ata_port
*ap
;
6472 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6476 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6477 ap
->lock
= &host
->lock
;
6478 ap
->flags
= ATA_FLAG_DISABLED
;
6480 ap
->ctl
= ATA_DEVCTL_OBS
;
6482 ap
->dev
= host
->dev
;
6483 ap
->last_ctl
= 0xFF;
6485 #if defined(ATA_VERBOSE_DEBUG)
6486 /* turn on all debugging levels */
6487 ap
->msg_enable
= 0x00FF;
6488 #elif defined(ATA_DEBUG)
6489 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6491 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6494 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6495 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6496 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6497 INIT_LIST_HEAD(&ap
->eh_done_q
);
6498 init_waitqueue_head(&ap
->eh_wait_q
);
6499 init_timer_deferrable(&ap
->fastdrain_timer
);
6500 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6501 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6503 ap
->cbl
= ATA_CBL_NONE
;
6505 ata_link_init(ap
, &ap
->link
, 0);
6508 ap
->stats
.unhandled_irq
= 1;
6509 ap
->stats
.idle_irq
= 1;
6514 static void ata_host_release(struct device
*gendev
, void *res
)
6516 struct ata_host
*host
= dev_get_drvdata(gendev
);
6519 for (i
= 0; i
< host
->n_ports
; i
++) {
6520 struct ata_port
*ap
= host
->ports
[i
];
6525 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6526 ap
->ops
->port_stop(ap
);
6529 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6530 host
->ops
->host_stop(host
);
6532 for (i
= 0; i
< host
->n_ports
; i
++) {
6533 struct ata_port
*ap
= host
->ports
[i
];
6539 scsi_host_put(ap
->scsi_host
);
6541 kfree(ap
->pmp_link
);
6543 host
->ports
[i
] = NULL
;
6546 dev_set_drvdata(gendev
, NULL
);
6550 * ata_host_alloc - allocate and init basic ATA host resources
6551 * @dev: generic device this host is associated with
6552 * @max_ports: maximum number of ATA ports associated with this host
6554 * Allocate and initialize basic ATA host resources. LLD calls
6555 * this function to allocate a host, initializes it fully and
6556 * attaches it using ata_host_register().
6558 * @max_ports ports are allocated and host->n_ports is
6559 * initialized to @max_ports. The caller is allowed to decrease
6560 * host->n_ports before calling ata_host_register(). The unused
6561 * ports will be automatically freed on registration.
6564 * Allocate ATA host on success, NULL on failure.
6567 * Inherited from calling layer (may sleep).
6569 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6571 struct ata_host
*host
;
6577 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6580 /* alloc a container for our list of ATA ports (buses) */
6581 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6582 /* alloc a container for our list of ATA ports (buses) */
6583 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6587 devres_add(dev
, host
);
6588 dev_set_drvdata(dev
, host
);
6590 spin_lock_init(&host
->lock
);
6592 host
->n_ports
= max_ports
;
6594 /* allocate ports bound to this host */
6595 for (i
= 0; i
< max_ports
; i
++) {
6596 struct ata_port
*ap
;
6598 ap
= ata_port_alloc(host
);
6603 host
->ports
[i
] = ap
;
6606 devres_remove_group(dev
, NULL
);
6610 devres_release_group(dev
, NULL
);
6615 * ata_host_alloc_pinfo - alloc host and init with port_info array
6616 * @dev: generic device this host is associated with
6617 * @ppi: array of ATA port_info to initialize host with
6618 * @n_ports: number of ATA ports attached to this host
6620 * Allocate ATA host and initialize with info from @ppi. If NULL
6621 * terminated, @ppi may contain fewer entries than @n_ports. The
6622 * last entry will be used for the remaining ports.
6625 * Allocate ATA host on success, NULL on failure.
6628 * Inherited from calling layer (may sleep).
6630 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6631 const struct ata_port_info
* const * ppi
,
6634 const struct ata_port_info
*pi
;
6635 struct ata_host
*host
;
6638 host
= ata_host_alloc(dev
, n_ports
);
6642 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6643 struct ata_port
*ap
= host
->ports
[i
];
6648 ap
->pio_mask
= pi
->pio_mask
;
6649 ap
->mwdma_mask
= pi
->mwdma_mask
;
6650 ap
->udma_mask
= pi
->udma_mask
;
6651 ap
->flags
|= pi
->flags
;
6652 ap
->link
.flags
|= pi
->link_flags
;
6653 ap
->ops
= pi
->port_ops
;
6655 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6656 host
->ops
= pi
->port_ops
;
6657 if (!host
->private_data
&& pi
->private_data
)
6658 host
->private_data
= pi
->private_data
;
6665 * ata_host_start - start and freeze ports of an ATA host
6666 * @host: ATA host to start ports for
6668 * Start and then freeze ports of @host. Started status is
6669 * recorded in host->flags, so this function can be called
6670 * multiple times. Ports are guaranteed to get started only
6671 * once. If host->ops isn't initialized yet, its set to the
6672 * first non-dummy port ops.
6675 * Inherited from calling layer (may sleep).
6678 * 0 if all ports are started successfully, -errno otherwise.
6680 int ata_host_start(struct ata_host
*host
)
6684 if (host
->flags
& ATA_HOST_STARTED
)
6687 for (i
= 0; i
< host
->n_ports
; i
++) {
6688 struct ata_port
*ap
= host
->ports
[i
];
6690 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6691 host
->ops
= ap
->ops
;
6693 if (ap
->ops
->port_start
) {
6694 rc
= ap
->ops
->port_start(ap
);
6696 ata_port_printk(ap
, KERN_ERR
, "failed to "
6697 "start port (errno=%d)\n", rc
);
6702 ata_eh_freeze_port(ap
);
6705 host
->flags
|= ATA_HOST_STARTED
;
6710 struct ata_port
*ap
= host
->ports
[i
];
6712 if (ap
->ops
->port_stop
)
6713 ap
->ops
->port_stop(ap
);
6719 * ata_sas_host_init - Initialize a host struct
6720 * @host: host to initialize
6721 * @dev: device host is attached to
6722 * @flags: host flags
6726 * PCI/etc. bus probe sem.
6729 /* KILLME - the only user left is ipr */
6730 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6731 unsigned long flags
, const struct ata_port_operations
*ops
)
6733 spin_lock_init(&host
->lock
);
6735 host
->flags
= flags
;
6740 * ata_host_register - register initialized ATA host
6741 * @host: ATA host to register
6742 * @sht: template for SCSI host
6744 * Register initialized ATA host. @host is allocated using
6745 * ata_host_alloc() and fully initialized by LLD. This function
6746 * starts ports, registers @host with ATA and SCSI layers and
6747 * probe registered devices.
6750 * Inherited from calling layer (may sleep).
6753 * 0 on success, -errno otherwise.
6755 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6759 /* host must have been started */
6760 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6761 dev_printk(KERN_ERR
, host
->dev
,
6762 "BUG: trying to register unstarted host\n");
6767 /* Blow away unused ports. This happens when LLD can't
6768 * determine the exact number of ports to allocate at
6771 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6772 kfree(host
->ports
[i
]);
6774 /* give ports names and add SCSI hosts */
6775 for (i
= 0; i
< host
->n_ports
; i
++)
6776 host
->ports
[i
]->print_id
= ata_print_id
++;
6778 rc
= ata_scsi_add_hosts(host
, sht
);
6782 /* associate with ACPI nodes */
6783 ata_acpi_associate(host
);
6785 /* set cable, sata_spd_limit and report */
6786 for (i
= 0; i
< host
->n_ports
; i
++) {
6787 struct ata_port
*ap
= host
->ports
[i
];
6788 unsigned long xfer_mask
;
6790 /* set SATA cable type if still unset */
6791 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6792 ap
->cbl
= ATA_CBL_SATA
;
6794 /* init sata_spd_limit to the current value */
6795 sata_link_init_spd(&ap
->link
);
6797 /* print per-port info to dmesg */
6798 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6801 if (!ata_port_is_dummy(ap
)) {
6802 ata_port_printk(ap
, KERN_INFO
,
6803 "%cATA max %s %s\n",
6804 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6805 ata_mode_string(xfer_mask
),
6806 ap
->link
.eh_info
.desc
);
6807 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6809 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6812 /* perform each probe synchronously */
6813 DPRINTK("probe begin\n");
6814 for (i
= 0; i
< host
->n_ports
; i
++) {
6815 struct ata_port
*ap
= host
->ports
[i
];
6819 if (ap
->ops
->error_handler
) {
6820 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6821 unsigned long flags
;
6825 /* kick EH for boot probing */
6826 spin_lock_irqsave(ap
->lock
, flags
);
6829 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6830 ehi
->action
|= ATA_EH_SOFTRESET
;
6831 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6833 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6834 ap
->pflags
|= ATA_PFLAG_LOADING
;
6835 ata_port_schedule_eh(ap
);
6837 spin_unlock_irqrestore(ap
->lock
, flags
);
6839 /* wait for EH to finish */
6840 ata_port_wait_eh(ap
);
6842 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6843 rc
= ata_bus_probe(ap
);
6844 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6847 /* FIXME: do something useful here?
6848 * Current libata behavior will
6849 * tear down everything when
6850 * the module is removed
6851 * or the h/w is unplugged.
6857 /* probes are done, now scan each port's disk(s) */
6858 DPRINTK("host probe begin\n");
6859 for (i
= 0; i
< host
->n_ports
; i
++) {
6860 struct ata_port
*ap
= host
->ports
[i
];
6862 ata_scsi_scan_host(ap
, 1);
6869 * ata_host_activate - start host, request IRQ and register it
6870 * @host: target ATA host
6871 * @irq: IRQ to request
6872 * @irq_handler: irq_handler used when requesting IRQ
6873 * @irq_flags: irq_flags used when requesting IRQ
6874 * @sht: scsi_host_template to use when registering the host
6876 * After allocating an ATA host and initializing it, most libata
6877 * LLDs perform three steps to activate the host - start host,
6878 * request IRQ and register it. This helper takes necessasry
6879 * arguments and performs the three steps in one go.
6882 * Inherited from calling layer (may sleep).
6885 * 0 on success, -errno otherwise.
6887 int ata_host_activate(struct ata_host
*host
, int irq
,
6888 irq_handler_t irq_handler
, unsigned long irq_flags
,
6889 struct scsi_host_template
*sht
)
6893 rc
= ata_host_start(host
);
6897 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6898 dev_driver_string(host
->dev
), host
);
6902 for (i
= 0; i
< host
->n_ports
; i
++)
6903 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6905 rc
= ata_host_register(host
, sht
);
6906 /* if failed, just free the IRQ and leave ports alone */
6908 devm_free_irq(host
->dev
, irq
, host
);
6914 * ata_port_detach - Detach ATA port in prepration of device removal
6915 * @ap: ATA port to be detached
6917 * Detach all ATA devices and the associated SCSI devices of @ap;
6918 * then, remove the associated SCSI host. @ap is guaranteed to
6919 * be quiescent on return from this function.
6922 * Kernel thread context (may sleep).
6924 static void ata_port_detach(struct ata_port
*ap
)
6926 unsigned long flags
;
6927 struct ata_link
*link
;
6928 struct ata_device
*dev
;
6930 if (!ap
->ops
->error_handler
)
6933 /* tell EH we're leaving & flush EH */
6934 spin_lock_irqsave(ap
->lock
, flags
);
6935 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6936 spin_unlock_irqrestore(ap
->lock
, flags
);
6938 ata_port_wait_eh(ap
);
6940 /* EH is now guaranteed to see UNLOADING, so no new device
6941 * will be attached. Disable all existing devices.
6943 spin_lock_irqsave(ap
->lock
, flags
);
6945 ata_port_for_each_link(link
, ap
) {
6946 ata_link_for_each_dev(dev
, link
)
6947 ata_dev_disable(dev
);
6950 spin_unlock_irqrestore(ap
->lock
, flags
);
6952 /* Final freeze & EH. All in-flight commands are aborted. EH
6953 * will be skipped and retrials will be terminated with bad
6956 spin_lock_irqsave(ap
->lock
, flags
);
6957 ata_port_freeze(ap
); /* won't be thawed */
6958 spin_unlock_irqrestore(ap
->lock
, flags
);
6960 ata_port_wait_eh(ap
);
6961 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6964 /* remove the associated SCSI host */
6965 scsi_remove_host(ap
->scsi_host
);
6969 * ata_host_detach - Detach all ports of an ATA host
6970 * @host: Host to detach
6972 * Detach all ports of @host.
6975 * Kernel thread context (may sleep).
6977 void ata_host_detach(struct ata_host
*host
)
6981 for (i
= 0; i
< host
->n_ports
; i
++)
6982 ata_port_detach(host
->ports
[i
]);
6986 * ata_std_ports - initialize ioaddr with standard port offsets.
6987 * @ioaddr: IO address structure to be initialized
6989 * Utility function which initializes data_addr, error_addr,
6990 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6991 * device_addr, status_addr, and command_addr to standard offsets
6992 * relative to cmd_addr.
6994 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6997 void ata_std_ports(struct ata_ioports
*ioaddr
)
6999 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7000 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7001 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7002 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7003 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7004 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7005 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7006 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7007 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7008 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7015 * ata_pci_remove_one - PCI layer callback for device removal
7016 * @pdev: PCI device that was removed
7018 * PCI layer indicates to libata via this hook that hot-unplug or
7019 * module unload event has occurred. Detach all ports. Resource
7020 * release is handled via devres.
7023 * Inherited from PCI layer (may sleep).
7025 void ata_pci_remove_one(struct pci_dev
*pdev
)
7027 struct device
*dev
= &pdev
->dev
;
7028 struct ata_host
*host
= dev_get_drvdata(dev
);
7030 ata_host_detach(host
);
7033 /* move to PCI subsystem */
7034 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7036 unsigned long tmp
= 0;
7038 switch (bits
->width
) {
7041 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7047 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7053 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7064 return (tmp
== bits
->val
) ? 1 : 0;
7068 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7070 pci_save_state(pdev
);
7071 pci_disable_device(pdev
);
7073 if (mesg
.event
== PM_EVENT_SUSPEND
)
7074 pci_set_power_state(pdev
, PCI_D3hot
);
7077 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7081 pci_set_power_state(pdev
, PCI_D0
);
7082 pci_restore_state(pdev
);
7084 rc
= pcim_enable_device(pdev
);
7086 dev_printk(KERN_ERR
, &pdev
->dev
,
7087 "failed to enable device after resume (%d)\n", rc
);
7091 pci_set_master(pdev
);
7095 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7097 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7100 rc
= ata_host_suspend(host
, mesg
);
7104 ata_pci_device_do_suspend(pdev
, mesg
);
7109 int ata_pci_device_resume(struct pci_dev
*pdev
)
7111 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7114 rc
= ata_pci_device_do_resume(pdev
);
7116 ata_host_resume(host
);
7119 #endif /* CONFIG_PM */
7121 #endif /* CONFIG_PCI */
7124 static int __init
ata_init(void)
7126 ata_probe_timeout
*= HZ
;
7127 ata_wq
= create_workqueue("ata");
7131 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7133 destroy_workqueue(ata_wq
);
7137 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7141 static void __exit
ata_exit(void)
7143 destroy_workqueue(ata_wq
);
7144 destroy_workqueue(ata_aux_wq
);
7147 subsys_initcall(ata_init
);
7148 module_exit(ata_exit
);
7150 static unsigned long ratelimit_time
;
7151 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7153 int ata_ratelimit(void)
7156 unsigned long flags
;
7158 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7160 if (time_after(jiffies
, ratelimit_time
)) {
7162 ratelimit_time
= jiffies
+ (HZ
/5);
7166 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7172 * ata_wait_register - wait until register value changes
7173 * @reg: IO-mapped register
7174 * @mask: Mask to apply to read register value
7175 * @val: Wait condition
7176 * @interval_msec: polling interval in milliseconds
7177 * @timeout_msec: timeout in milliseconds
7179 * Waiting for some bits of register to change is a common
7180 * operation for ATA controllers. This function reads 32bit LE
7181 * IO-mapped register @reg and tests for the following condition.
7183 * (*@reg & mask) != val
7185 * If the condition is met, it returns; otherwise, the process is
7186 * repeated after @interval_msec until timeout.
7189 * Kernel thread context (may sleep)
7192 * The final register value.
7194 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7195 unsigned long interval_msec
,
7196 unsigned long timeout_msec
)
7198 unsigned long timeout
;
7201 tmp
= ioread32(reg
);
7203 /* Calculate timeout _after_ the first read to make sure
7204 * preceding writes reach the controller before starting to
7205 * eat away the timeout.
7207 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7209 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7210 msleep(interval_msec
);
7211 tmp
= ioread32(reg
);
7220 static void ata_dummy_noret(struct ata_port
*ap
) { }
7221 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7222 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7224 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7229 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7231 return AC_ERR_SYSTEM
;
7234 const struct ata_port_operations ata_dummy_port_ops
= {
7235 .check_status
= ata_dummy_check_status
,
7236 .check_altstatus
= ata_dummy_check_status
,
7237 .dev_select
= ata_noop_dev_select
,
7238 .qc_prep
= ata_noop_qc_prep
,
7239 .qc_issue
= ata_dummy_qc_issue
,
7240 .freeze
= ata_dummy_noret
,
7241 .thaw
= ata_dummy_noret
,
7242 .error_handler
= ata_dummy_noret
,
7243 .post_internal_cmd
= ata_dummy_qc_noret
,
7244 .irq_clear
= ata_dummy_noret
,
7245 .port_start
= ata_dummy_ret0
,
7246 .port_stop
= ata_dummy_noret
,
7249 const struct ata_port_info ata_dummy_port_info
= {
7250 .port_ops
= &ata_dummy_port_ops
,
7254 * libata is essentially a library of internal helper functions for
7255 * low-level ATA host controller drivers. As such, the API/ABI is
7256 * likely to change as new drivers are added and updated.
7257 * Do not depend on ABI/API stability.
7260 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7261 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7262 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7263 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7264 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7265 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7266 EXPORT_SYMBOL_GPL(ata_std_ports
);
7267 EXPORT_SYMBOL_GPL(ata_host_init
);
7268 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7269 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7270 EXPORT_SYMBOL_GPL(ata_host_start
);
7271 EXPORT_SYMBOL_GPL(ata_host_register
);
7272 EXPORT_SYMBOL_GPL(ata_host_activate
);
7273 EXPORT_SYMBOL_GPL(ata_host_detach
);
7274 EXPORT_SYMBOL_GPL(ata_sg_init
);
7275 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7276 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7277 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7278 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7279 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7280 EXPORT_SYMBOL_GPL(ata_tf_load
);
7281 EXPORT_SYMBOL_GPL(ata_tf_read
);
7282 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7283 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7284 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7285 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7286 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7287 EXPORT_SYMBOL_GPL(ata_check_status
);
7288 EXPORT_SYMBOL_GPL(ata_altstatus
);
7289 EXPORT_SYMBOL_GPL(ata_exec_command
);
7290 EXPORT_SYMBOL_GPL(ata_port_start
);
7291 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7292 EXPORT_SYMBOL_GPL(ata_interrupt
);
7293 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7294 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7295 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7296 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7297 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7298 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7299 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7300 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7301 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7302 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7303 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7304 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7305 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7306 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7307 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7308 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7309 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7310 EXPORT_SYMBOL_GPL(ata_port_probe
);
7311 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7312 EXPORT_SYMBOL_GPL(sata_set_spd
);
7313 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7314 EXPORT_SYMBOL_GPL(sata_link_resume
);
7315 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7316 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7317 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7318 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7319 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7320 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7321 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7322 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7323 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7324 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7325 EXPORT_SYMBOL_GPL(ata_port_disable
);
7326 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7327 EXPORT_SYMBOL_GPL(ata_wait_register
);
7328 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7329 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7330 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7331 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7332 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7333 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7334 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7335 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7336 EXPORT_SYMBOL_GPL(ata_host_intr
);
7337 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7338 EXPORT_SYMBOL_GPL(sata_scr_read
);
7339 EXPORT_SYMBOL_GPL(sata_scr_write
);
7340 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7341 EXPORT_SYMBOL_GPL(ata_link_online
);
7342 EXPORT_SYMBOL_GPL(ata_link_offline
);
7344 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7345 EXPORT_SYMBOL_GPL(ata_host_resume
);
7346 #endif /* CONFIG_PM */
7347 EXPORT_SYMBOL_GPL(ata_id_string
);
7348 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7349 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7350 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7352 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7353 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7354 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7357 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7358 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7359 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7360 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7361 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7362 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7364 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7365 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7366 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7367 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7368 #endif /* CONFIG_PM */
7369 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7370 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7371 #endif /* CONFIG_PCI */
7373 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7374 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7375 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7376 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7377 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7379 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7380 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7381 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7382 EXPORT_SYMBOL_GPL(ata_port_desc
);
7384 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7385 #endif /* CONFIG_PCI */
7386 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7387 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7388 EXPORT_SYMBOL_GPL(ata_link_abort
);
7389 EXPORT_SYMBOL_GPL(ata_port_abort
);
7390 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7391 EXPORT_SYMBOL_GPL(sata_async_notification
);
7392 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7393 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7394 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7395 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7396 EXPORT_SYMBOL_GPL(ata_do_eh
);
7397 EXPORT_SYMBOL_GPL(ata_irq_on
);
7398 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7400 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7401 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7402 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7403 EXPORT_SYMBOL_GPL(ata_cable_sata
);