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 ata_link_for_each_dev(dev
, &ap
->link
) {
2223 /* If we issue an SRST then an ATA drive (not ATAPI)
2224 * may change configuration and be in PIO0 timing. If
2225 * we do a hard reset (or are coming from power on)
2226 * this is true for ATA or ATAPI. Until we've set a
2227 * suitable controller mode we should not touch the
2228 * bus as we may be talking too fast.
2230 dev
->pio_mode
= XFER_PIO_0
;
2232 /* If the controller has a pio mode setup function
2233 * then use it to set the chipset to rights. Don't
2234 * touch the DMA setup as that will be dealt with when
2235 * configuring devices.
2237 if (ap
->ops
->set_piomode
)
2238 ap
->ops
->set_piomode(ap
, dev
);
2241 /* reset and determine device classes */
2242 ap
->ops
->phy_reset(ap
);
2244 ata_link_for_each_dev(dev
, &ap
->link
) {
2245 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2246 dev
->class != ATA_DEV_UNKNOWN
)
2247 classes
[dev
->devno
] = dev
->class;
2249 classes
[dev
->devno
] = ATA_DEV_NONE
;
2251 dev
->class = ATA_DEV_UNKNOWN
;
2256 /* read IDENTIFY page and configure devices. We have to do the identify
2257 specific sequence bass-ackwards so that PDIAG- is released by
2260 ata_link_for_each_dev(dev
, &ap
->link
) {
2261 if (tries
[dev
->devno
])
2262 dev
->class = classes
[dev
->devno
];
2264 if (!ata_dev_enabled(dev
))
2267 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2273 /* Now ask for the cable type as PDIAG- should have been released */
2274 if (ap
->ops
->cable_detect
)
2275 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2277 /* We may have SATA bridge glue hiding here irrespective of the
2278 reported cable types and sensed types */
2279 ata_link_for_each_dev(dev
, &ap
->link
) {
2280 if (!ata_dev_enabled(dev
))
2282 /* SATA drives indicate we have a bridge. We don't know which
2283 end of the link the bridge is which is a problem */
2284 if (ata_id_is_sata(dev
->id
))
2285 ap
->cbl
= ATA_CBL_SATA
;
2288 /* After the identify sequence we can now set up the devices. We do
2289 this in the normal order so that the user doesn't get confused */
2291 ata_link_for_each_dev(dev
, &ap
->link
) {
2292 if (!ata_dev_enabled(dev
))
2295 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2296 rc
= ata_dev_configure(dev
);
2297 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2302 /* configure transfer mode */
2303 rc
= ata_set_mode(&ap
->link
, &dev
);
2307 ata_link_for_each_dev(dev
, &ap
->link
)
2308 if (ata_dev_enabled(dev
))
2311 /* no device present, disable port */
2312 ata_port_disable(ap
);
2316 tries
[dev
->devno
]--;
2320 /* eeek, something went very wrong, give up */
2321 tries
[dev
->devno
] = 0;
2325 /* give it just one more chance */
2326 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2328 if (tries
[dev
->devno
] == 1) {
2329 /* This is the last chance, better to slow
2330 * down than lose it.
2332 sata_down_spd_limit(&ap
->link
);
2333 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2337 if (!tries
[dev
->devno
])
2338 ata_dev_disable(dev
);
2344 * ata_port_probe - Mark port as enabled
2345 * @ap: Port for which we indicate enablement
2347 * Modify @ap data structure such that the system
2348 * thinks that the entire port is enabled.
2350 * LOCKING: host lock, or some other form of
2354 void ata_port_probe(struct ata_port
*ap
)
2356 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2360 * sata_print_link_status - Print SATA link status
2361 * @link: SATA link to printk link status about
2363 * This function prints link speed and status of a SATA link.
2368 void sata_print_link_status(struct ata_link
*link
)
2370 u32 sstatus
, scontrol
, tmp
;
2372 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2374 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2376 if (ata_link_online(link
)) {
2377 tmp
= (sstatus
>> 4) & 0xf;
2378 ata_link_printk(link
, KERN_INFO
,
2379 "SATA link up %s (SStatus %X SControl %X)\n",
2380 sata_spd_string(tmp
), sstatus
, scontrol
);
2382 ata_link_printk(link
, KERN_INFO
,
2383 "SATA link down (SStatus %X SControl %X)\n",
2389 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2390 * @ap: SATA port associated with target SATA PHY.
2392 * This function issues commands to standard SATA Sxxx
2393 * PHY registers, to wake up the phy (and device), and
2394 * clear any reset condition.
2397 * PCI/etc. bus probe sem.
2400 void __sata_phy_reset(struct ata_port
*ap
)
2402 struct ata_link
*link
= &ap
->link
;
2403 unsigned long timeout
= jiffies
+ (HZ
* 5);
2406 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2407 /* issue phy wake/reset */
2408 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2409 /* Couldn't find anything in SATA I/II specs, but
2410 * AHCI-1.1 10.4.2 says at least 1 ms. */
2413 /* phy wake/clear reset */
2414 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2416 /* wait for phy to become ready, if necessary */
2419 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2420 if ((sstatus
& 0xf) != 1)
2422 } while (time_before(jiffies
, timeout
));
2424 /* print link status */
2425 sata_print_link_status(link
);
2427 /* TODO: phy layer with polling, timeouts, etc. */
2428 if (!ata_link_offline(link
))
2431 ata_port_disable(ap
);
2433 if (ap
->flags
& ATA_FLAG_DISABLED
)
2436 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2437 ata_port_disable(ap
);
2441 ap
->cbl
= ATA_CBL_SATA
;
2445 * sata_phy_reset - Reset SATA bus.
2446 * @ap: SATA port associated with target SATA PHY.
2448 * This function resets the SATA bus, and then probes
2449 * the bus for devices.
2452 * PCI/etc. bus probe sem.
2455 void sata_phy_reset(struct ata_port
*ap
)
2457 __sata_phy_reset(ap
);
2458 if (ap
->flags
& ATA_FLAG_DISABLED
)
2464 * ata_dev_pair - return other device on cable
2467 * Obtain the other device on the same cable, or if none is
2468 * present NULL is returned
2471 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2473 struct ata_link
*link
= adev
->link
;
2474 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2475 if (!ata_dev_enabled(pair
))
2481 * ata_port_disable - Disable port.
2482 * @ap: Port to be disabled.
2484 * Modify @ap data structure such that the system
2485 * thinks that the entire port is disabled, and should
2486 * never attempt to probe or communicate with devices
2489 * LOCKING: host lock, or some other form of
2493 void ata_port_disable(struct ata_port
*ap
)
2495 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2496 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2497 ap
->flags
|= ATA_FLAG_DISABLED
;
2501 * sata_down_spd_limit - adjust SATA spd limit downward
2502 * @link: Link to adjust SATA spd limit for
2504 * Adjust SATA spd limit of @link downward. Note that this
2505 * function only adjusts the limit. The change must be applied
2506 * using sata_set_spd().
2509 * Inherited from caller.
2512 * 0 on success, negative errno on failure
2514 int sata_down_spd_limit(struct ata_link
*link
)
2516 u32 sstatus
, spd
, mask
;
2519 if (!sata_scr_valid(link
))
2522 /* If SCR can be read, use it to determine the current SPD.
2523 * If not, use cached value in link->sata_spd.
2525 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2527 spd
= (sstatus
>> 4) & 0xf;
2529 spd
= link
->sata_spd
;
2531 mask
= link
->sata_spd_limit
;
2535 /* unconditionally mask off the highest bit */
2536 highbit
= fls(mask
) - 1;
2537 mask
&= ~(1 << highbit
);
2539 /* Mask off all speeds higher than or equal to the current
2540 * one. Force 1.5Gbps if current SPD is not available.
2543 mask
&= (1 << (spd
- 1)) - 1;
2547 /* were we already at the bottom? */
2551 link
->sata_spd_limit
= mask
;
2553 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2554 sata_spd_string(fls(mask
)));
2559 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2563 if (link
->sata_spd_limit
== UINT_MAX
)
2566 limit
= fls(link
->sata_spd_limit
);
2568 spd
= (*scontrol
>> 4) & 0xf;
2569 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2571 return spd
!= limit
;
2575 * sata_set_spd_needed - is SATA spd configuration needed
2576 * @link: Link in question
2578 * Test whether the spd limit in SControl matches
2579 * @link->sata_spd_limit. This function is used to determine
2580 * whether hardreset is necessary to apply SATA spd
2584 * Inherited from caller.
2587 * 1 if SATA spd configuration is needed, 0 otherwise.
2589 int sata_set_spd_needed(struct ata_link
*link
)
2593 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2596 return __sata_set_spd_needed(link
, &scontrol
);
2600 * sata_set_spd - set SATA spd according to spd limit
2601 * @link: Link to set SATA spd for
2603 * Set SATA spd of @link according to sata_spd_limit.
2606 * Inherited from caller.
2609 * 0 if spd doesn't need to be changed, 1 if spd has been
2610 * changed. Negative errno if SCR registers are inaccessible.
2612 int sata_set_spd(struct ata_link
*link
)
2617 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2620 if (!__sata_set_spd_needed(link
, &scontrol
))
2623 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2630 * This mode timing computation functionality is ported over from
2631 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2634 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2635 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2636 * for UDMA6, which is currently supported only by Maxtor drives.
2638 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2641 static const struct ata_timing ata_timing
[] = {
2643 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2644 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2645 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2646 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2648 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2649 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2650 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2651 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2652 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2654 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2656 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2657 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2658 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2660 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2661 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2662 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2664 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2665 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2666 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2667 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2669 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2670 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2671 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2673 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2678 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2679 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2681 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2683 q
->setup
= EZ(t
->setup
* 1000, T
);
2684 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2685 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2686 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2687 q
->active
= EZ(t
->active
* 1000, T
);
2688 q
->recover
= EZ(t
->recover
* 1000, T
);
2689 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2690 q
->udma
= EZ(t
->udma
* 1000, UT
);
2693 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2694 struct ata_timing
*m
, unsigned int what
)
2696 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2697 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2698 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2699 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2700 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2701 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2702 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2703 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2706 static const struct ata_timing
*ata_timing_find_mode(unsigned short speed
)
2708 const struct ata_timing
*t
;
2710 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2711 if (t
->mode
== 0xFF)
2716 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2717 struct ata_timing
*t
, int T
, int UT
)
2719 const struct ata_timing
*s
;
2720 struct ata_timing p
;
2726 if (!(s
= ata_timing_find_mode(speed
)))
2729 memcpy(t
, s
, sizeof(*s
));
2732 * If the drive is an EIDE drive, it can tell us it needs extended
2733 * PIO/MW_DMA cycle timing.
2736 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2737 memset(&p
, 0, sizeof(p
));
2738 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2739 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2740 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2741 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2742 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2744 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2748 * Convert the timing to bus clock counts.
2751 ata_timing_quantize(t
, t
, T
, UT
);
2754 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2755 * S.M.A.R.T * and some other commands. We have to ensure that the
2756 * DMA cycle timing is slower/equal than the fastest PIO timing.
2759 if (speed
> XFER_PIO_6
) {
2760 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2761 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2765 * Lengthen active & recovery time so that cycle time is correct.
2768 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2769 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2770 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2773 if (t
->active
+ t
->recover
< t
->cycle
) {
2774 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2775 t
->recover
= t
->cycle
- t
->active
;
2778 /* In a few cases quantisation may produce enough errors to
2779 leave t->cycle too low for the sum of active and recovery
2780 if so we must correct this */
2781 if (t
->active
+ t
->recover
> t
->cycle
)
2782 t
->cycle
= t
->active
+ t
->recover
;
2788 * ata_down_xfermask_limit - adjust dev xfer masks downward
2789 * @dev: Device to adjust xfer masks
2790 * @sel: ATA_DNXFER_* selector
2792 * Adjust xfer masks of @dev downward. Note that this function
2793 * does not apply the change. Invoking ata_set_mode() afterwards
2794 * will apply the limit.
2797 * Inherited from caller.
2800 * 0 on success, negative errno on failure
2802 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2805 unsigned int orig_mask
, xfer_mask
;
2806 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2809 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2810 sel
&= ~ATA_DNXFER_QUIET
;
2812 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2815 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2818 case ATA_DNXFER_PIO
:
2819 highbit
= fls(pio_mask
) - 1;
2820 pio_mask
&= ~(1 << highbit
);
2823 case ATA_DNXFER_DMA
:
2825 highbit
= fls(udma_mask
) - 1;
2826 udma_mask
&= ~(1 << highbit
);
2829 } else if (mwdma_mask
) {
2830 highbit
= fls(mwdma_mask
) - 1;
2831 mwdma_mask
&= ~(1 << highbit
);
2837 case ATA_DNXFER_40C
:
2838 udma_mask
&= ATA_UDMA_MASK_40C
;
2841 case ATA_DNXFER_FORCE_PIO0
:
2843 case ATA_DNXFER_FORCE_PIO
:
2852 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2854 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2858 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2859 snprintf(buf
, sizeof(buf
), "%s:%s",
2860 ata_mode_string(xfer_mask
),
2861 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2863 snprintf(buf
, sizeof(buf
), "%s",
2864 ata_mode_string(xfer_mask
));
2866 ata_dev_printk(dev
, KERN_WARNING
,
2867 "limiting speed to %s\n", buf
);
2870 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2876 static int ata_dev_set_mode(struct ata_device
*dev
)
2878 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2879 unsigned int err_mask
;
2882 dev
->flags
&= ~ATA_DFLAG_PIO
;
2883 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2884 dev
->flags
|= ATA_DFLAG_PIO
;
2886 err_mask
= ata_dev_set_xfermode(dev
);
2888 /* Old CFA may refuse this command, which is just fine */
2889 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2890 err_mask
&= ~AC_ERR_DEV
;
2892 /* Some very old devices and some bad newer ones fail any kind of
2893 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2894 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
2895 dev
->pio_mode
<= XFER_PIO_2
)
2896 err_mask
&= ~AC_ERR_DEV
;
2898 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
2899 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
2900 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
2901 dev
->dma_mode
== XFER_MW_DMA_0
&&
2902 (dev
->id
[63] >> 8) & 1)
2903 err_mask
&= ~AC_ERR_DEV
;
2906 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2907 "(err_mask=0x%x)\n", err_mask
);
2911 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2912 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
2913 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2917 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2918 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2920 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2921 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2926 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2927 * @link: link on which timings will be programmed
2928 * @r_failed_dev: out paramter for failed device
2930 * Standard implementation of the function used to tune and set
2931 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2932 * ata_dev_set_mode() fails, pointer to the failing device is
2933 * returned in @r_failed_dev.
2936 * PCI/etc. bus probe sem.
2939 * 0 on success, negative errno otherwise
2942 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
2944 struct ata_port
*ap
= link
->ap
;
2945 struct ata_device
*dev
;
2946 int rc
= 0, used_dma
= 0, found
= 0;
2948 /* step 1: calculate xfer_mask */
2949 ata_link_for_each_dev(dev
, link
) {
2950 unsigned int pio_mask
, dma_mask
;
2951 unsigned int mode_mask
;
2953 if (!ata_dev_enabled(dev
))
2956 mode_mask
= ATA_DMA_MASK_ATA
;
2957 if (dev
->class == ATA_DEV_ATAPI
)
2958 mode_mask
= ATA_DMA_MASK_ATAPI
;
2959 else if (ata_id_is_cfa(dev
->id
))
2960 mode_mask
= ATA_DMA_MASK_CFA
;
2962 ata_dev_xfermask(dev
);
2964 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2965 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2967 if (libata_dma_mask
& mode_mask
)
2968 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2972 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2973 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2982 /* step 2: always set host PIO timings */
2983 ata_link_for_each_dev(dev
, link
) {
2984 if (!ata_dev_enabled(dev
))
2987 if (!dev
->pio_mode
) {
2988 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2993 dev
->xfer_mode
= dev
->pio_mode
;
2994 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2995 if (ap
->ops
->set_piomode
)
2996 ap
->ops
->set_piomode(ap
, dev
);
2999 /* step 3: set host DMA timings */
3000 ata_link_for_each_dev(dev
, link
) {
3001 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
3004 dev
->xfer_mode
= dev
->dma_mode
;
3005 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3006 if (ap
->ops
->set_dmamode
)
3007 ap
->ops
->set_dmamode(ap
, dev
);
3010 /* step 4: update devices' xfer mode */
3011 ata_link_for_each_dev(dev
, link
) {
3012 /* don't update suspended devices' xfer mode */
3013 if (!ata_dev_enabled(dev
))
3016 rc
= ata_dev_set_mode(dev
);
3021 /* Record simplex status. If we selected DMA then the other
3022 * host channels are not permitted to do so.
3024 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3025 ap
->host
->simplex_claimed
= ap
;
3029 *r_failed_dev
= dev
;
3034 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3035 * @link: link on which timings will be programmed
3036 * @r_failed_dev: out paramter for failed device
3038 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3039 * ata_set_mode() fails, pointer to the failing device is
3040 * returned in @r_failed_dev.
3043 * PCI/etc. bus probe sem.
3046 * 0 on success, negative errno otherwise
3048 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3050 struct ata_port
*ap
= link
->ap
;
3052 /* has private set_mode? */
3053 if (ap
->ops
->set_mode
)
3054 return ap
->ops
->set_mode(link
, r_failed_dev
);
3055 return ata_do_set_mode(link
, r_failed_dev
);
3059 * ata_tf_to_host - issue ATA taskfile to host controller
3060 * @ap: port to which command is being issued
3061 * @tf: ATA taskfile register set
3063 * Issues ATA taskfile register set to ATA host controller,
3064 * with proper synchronization with interrupt handler and
3068 * spin_lock_irqsave(host lock)
3071 static inline void ata_tf_to_host(struct ata_port
*ap
,
3072 const struct ata_taskfile
*tf
)
3074 ap
->ops
->tf_load(ap
, tf
);
3075 ap
->ops
->exec_command(ap
, tf
);
3079 * ata_busy_sleep - sleep until BSY clears, or timeout
3080 * @ap: port containing status register to be polled
3081 * @tmout_pat: impatience timeout
3082 * @tmout: overall timeout
3084 * Sleep until ATA Status register bit BSY clears,
3085 * or a timeout occurs.
3088 * Kernel thread context (may sleep).
3091 * 0 on success, -errno otherwise.
3093 int ata_busy_sleep(struct ata_port
*ap
,
3094 unsigned long tmout_pat
, unsigned long tmout
)
3096 unsigned long timer_start
, timeout
;
3099 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3100 timer_start
= jiffies
;
3101 timeout
= timer_start
+ tmout_pat
;
3102 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3103 time_before(jiffies
, timeout
)) {
3105 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3108 if (status
!= 0xff && (status
& ATA_BUSY
))
3109 ata_port_printk(ap
, KERN_WARNING
,
3110 "port is slow to respond, please be patient "
3111 "(Status 0x%x)\n", status
);
3113 timeout
= timer_start
+ tmout
;
3114 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3115 time_before(jiffies
, timeout
)) {
3117 status
= ata_chk_status(ap
);
3123 if (status
& ATA_BUSY
) {
3124 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3125 "(%lu secs, Status 0x%x)\n",
3126 tmout
/ HZ
, status
);
3134 * ata_wait_after_reset - wait before checking status after reset
3135 * @ap: port containing status register to be polled
3136 * @deadline: deadline jiffies for the operation
3138 * After reset, we need to pause a while before reading status.
3139 * Also, certain combination of controller and device report 0xff
3140 * for some duration (e.g. until SATA PHY is up and running)
3141 * which is interpreted as empty port in ATA world. This
3142 * function also waits for such devices to get out of 0xff
3146 * Kernel thread context (may sleep).
3148 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3150 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3152 if (time_before(until
, deadline
))
3155 /* Spec mandates ">= 2ms" before checking status. We wait
3156 * 150ms, because that was the magic delay used for ATAPI
3157 * devices in Hale Landis's ATADRVR, for the period of time
3158 * between when the ATA command register is written, and then
3159 * status is checked. Because waiting for "a while" before
3160 * checking status is fine, post SRST, we perform this magic
3161 * delay here as well.
3163 * Old drivers/ide uses the 2mS rule and then waits for ready.
3167 /* Wait for 0xff to clear. Some SATA devices take a long time
3168 * to clear 0xff after reset. For example, HHD424020F7SV00
3169 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3173 u8 status
= ata_chk_status(ap
);
3175 if (status
!= 0xff || time_after(jiffies
, deadline
))
3183 * ata_wait_ready - sleep until BSY clears, or timeout
3184 * @ap: port containing status register to be polled
3185 * @deadline: deadline jiffies for the operation
3187 * Sleep until ATA Status register bit BSY clears, or timeout
3191 * Kernel thread context (may sleep).
3194 * 0 on success, -errno otherwise.
3196 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3198 unsigned long start
= jiffies
;
3202 u8 status
= ata_chk_status(ap
);
3203 unsigned long now
= jiffies
;
3205 if (!(status
& ATA_BUSY
))
3207 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3209 if (time_after(now
, deadline
))
3212 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3213 (deadline
- now
> 3 * HZ
)) {
3214 ata_port_printk(ap
, KERN_WARNING
,
3215 "port is slow to respond, please be patient "
3216 "(Status 0x%x)\n", status
);
3224 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3225 unsigned long deadline
)
3227 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3228 unsigned int dev0
= devmask
& (1 << 0);
3229 unsigned int dev1
= devmask
& (1 << 1);
3232 /* if device 0 was found in ata_devchk, wait for its
3236 rc
= ata_wait_ready(ap
, deadline
);
3244 /* if device 1 was found in ata_devchk, wait for register
3245 * access briefly, then wait for BSY to clear.
3250 ap
->ops
->dev_select(ap
, 1);
3252 /* Wait for register access. Some ATAPI devices fail
3253 * to set nsect/lbal after reset, so don't waste too
3254 * much time on it. We're gonna wait for !BSY anyway.
3256 for (i
= 0; i
< 2; i
++) {
3259 nsect
= ioread8(ioaddr
->nsect_addr
);
3260 lbal
= ioread8(ioaddr
->lbal_addr
);
3261 if ((nsect
== 1) && (lbal
== 1))
3263 msleep(50); /* give drive a breather */
3266 rc
= ata_wait_ready(ap
, deadline
);
3274 /* is all this really necessary? */
3275 ap
->ops
->dev_select(ap
, 0);
3277 ap
->ops
->dev_select(ap
, 1);
3279 ap
->ops
->dev_select(ap
, 0);
3284 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3285 unsigned long deadline
)
3287 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3289 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3291 /* software reset. causes dev0 to be selected */
3292 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3293 udelay(20); /* FIXME: flush */
3294 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3295 udelay(20); /* FIXME: flush */
3296 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3298 /* wait a while before checking status */
3299 ata_wait_after_reset(ap
, deadline
);
3301 /* Before we perform post reset processing we want to see if
3302 * the bus shows 0xFF because the odd clown forgets the D7
3303 * pulldown resistor.
3305 if (ata_chk_status(ap
) == 0xFF)
3308 return ata_bus_post_reset(ap
, devmask
, deadline
);
3312 * ata_bus_reset - reset host port and associated ATA channel
3313 * @ap: port to reset
3315 * This is typically the first time we actually start issuing
3316 * commands to the ATA channel. We wait for BSY to clear, then
3317 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3318 * result. Determine what devices, if any, are on the channel
3319 * by looking at the device 0/1 error register. Look at the signature
3320 * stored in each device's taskfile registers, to determine if
3321 * the device is ATA or ATAPI.
3324 * PCI/etc. bus probe sem.
3325 * Obtains host lock.
3328 * Sets ATA_FLAG_DISABLED if bus reset fails.
3331 void ata_bus_reset(struct ata_port
*ap
)
3333 struct ata_device
*device
= ap
->link
.device
;
3334 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3335 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3337 unsigned int dev0
, dev1
= 0, devmask
= 0;
3340 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3342 /* determine if device 0/1 are present */
3343 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3346 dev0
= ata_devchk(ap
, 0);
3348 dev1
= ata_devchk(ap
, 1);
3352 devmask
|= (1 << 0);
3354 devmask
|= (1 << 1);
3356 /* select device 0 again */
3357 ap
->ops
->dev_select(ap
, 0);
3359 /* issue bus reset */
3360 if (ap
->flags
& ATA_FLAG_SRST
) {
3361 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3362 if (rc
&& rc
!= -ENODEV
)
3367 * determine by signature whether we have ATA or ATAPI devices
3369 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3370 if ((slave_possible
) && (err
!= 0x81))
3371 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3373 /* is double-select really necessary? */
3374 if (device
[1].class != ATA_DEV_NONE
)
3375 ap
->ops
->dev_select(ap
, 1);
3376 if (device
[0].class != ATA_DEV_NONE
)
3377 ap
->ops
->dev_select(ap
, 0);
3379 /* if no devices were detected, disable this port */
3380 if ((device
[0].class == ATA_DEV_NONE
) &&
3381 (device
[1].class == ATA_DEV_NONE
))
3384 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3385 /* set up device control for ATA_FLAG_SATA_RESET */
3386 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3393 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3394 ata_port_disable(ap
);
3400 * sata_link_debounce - debounce SATA phy status
3401 * @link: ATA link to debounce SATA phy status for
3402 * @params: timing parameters { interval, duratinon, timeout } in msec
3403 * @deadline: deadline jiffies for the operation
3405 * Make sure SStatus of @link reaches stable state, determined by
3406 * holding the same value where DET is not 1 for @duration polled
3407 * every @interval, before @timeout. Timeout constraints the
3408 * beginning of the stable state. Because DET gets stuck at 1 on
3409 * some controllers after hot unplugging, this functions waits
3410 * until timeout then returns 0 if DET is stable at 1.
3412 * @timeout is further limited by @deadline. The sooner of the
3416 * Kernel thread context (may sleep)
3419 * 0 on success, -errno on failure.
3421 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3422 unsigned long deadline
)
3424 unsigned long interval_msec
= params
[0];
3425 unsigned long duration
= msecs_to_jiffies(params
[1]);
3426 unsigned long last_jiffies
, t
;
3430 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3431 if (time_before(t
, deadline
))
3434 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3439 last_jiffies
= jiffies
;
3442 msleep(interval_msec
);
3443 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3449 if (cur
== 1 && time_before(jiffies
, deadline
))
3451 if (time_after(jiffies
, last_jiffies
+ duration
))
3456 /* unstable, start over */
3458 last_jiffies
= jiffies
;
3460 /* Check deadline. If debouncing failed, return
3461 * -EPIPE to tell upper layer to lower link speed.
3463 if (time_after(jiffies
, deadline
))
3469 * sata_link_resume - resume SATA link
3470 * @link: ATA link to resume SATA
3471 * @params: timing parameters { interval, duratinon, timeout } in msec
3472 * @deadline: deadline jiffies for the operation
3474 * Resume SATA phy @link and debounce it.
3477 * Kernel thread context (may sleep)
3480 * 0 on success, -errno on failure.
3482 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3483 unsigned long deadline
)
3488 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3491 scontrol
= (scontrol
& 0x0f0) | 0x300;
3493 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3496 /* Some PHYs react badly if SStatus is pounded immediately
3497 * after resuming. Delay 200ms before debouncing.
3501 return sata_link_debounce(link
, params
, deadline
);
3505 * ata_std_prereset - prepare for reset
3506 * @link: ATA link to be reset
3507 * @deadline: deadline jiffies for the operation
3509 * @link is about to be reset. Initialize it. Failure from
3510 * prereset makes libata abort whole reset sequence and give up
3511 * that port, so prereset should be best-effort. It does its
3512 * best to prepare for reset sequence but if things go wrong, it
3513 * should just whine, not fail.
3516 * Kernel thread context (may sleep)
3519 * 0 on success, -errno otherwise.
3521 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3523 struct ata_port
*ap
= link
->ap
;
3524 struct ata_eh_context
*ehc
= &link
->eh_context
;
3525 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3528 /* handle link resume */
3529 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3530 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3531 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3533 /* Some PMPs don't work with only SRST, force hardreset if PMP
3536 if (ap
->flags
& ATA_FLAG_PMP
)
3537 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3539 /* if we're about to do hardreset, nothing more to do */
3540 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3543 /* if SATA, resume link */
3544 if (ap
->flags
& ATA_FLAG_SATA
) {
3545 rc
= sata_link_resume(link
, timing
, deadline
);
3546 /* whine about phy resume failure but proceed */
3547 if (rc
&& rc
!= -EOPNOTSUPP
)
3548 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3549 "link for reset (errno=%d)\n", rc
);
3552 /* Wait for !BSY if the controller can wait for the first D2H
3553 * Reg FIS and we don't know that no device is attached.
3555 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3556 rc
= ata_wait_ready(ap
, deadline
);
3557 if (rc
&& rc
!= -ENODEV
) {
3558 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3559 "(errno=%d), forcing hardreset\n", rc
);
3560 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3568 * ata_std_softreset - reset host port via ATA SRST
3569 * @link: ATA link to reset
3570 * @classes: resulting classes of attached devices
3571 * @deadline: deadline jiffies for the operation
3573 * Reset host port using ATA SRST.
3576 * Kernel thread context (may sleep)
3579 * 0 on success, -errno otherwise.
3581 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3582 unsigned long deadline
)
3584 struct ata_port
*ap
= link
->ap
;
3585 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3586 unsigned int devmask
= 0;
3592 if (ata_link_offline(link
)) {
3593 classes
[0] = ATA_DEV_NONE
;
3597 /* determine if device 0/1 are present */
3598 if (ata_devchk(ap
, 0))
3599 devmask
|= (1 << 0);
3600 if (slave_possible
&& ata_devchk(ap
, 1))
3601 devmask
|= (1 << 1);
3603 /* select device 0 again */
3604 ap
->ops
->dev_select(ap
, 0);
3606 /* issue bus reset */
3607 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3608 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3609 /* if link is occupied, -ENODEV too is an error */
3610 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3611 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3615 /* determine by signature whether we have ATA or ATAPI devices */
3616 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3617 devmask
& (1 << 0), &err
);
3618 if (slave_possible
&& err
!= 0x81)
3619 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3620 devmask
& (1 << 1), &err
);
3623 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3628 * sata_link_hardreset - reset link via SATA phy reset
3629 * @link: link to reset
3630 * @timing: timing parameters { interval, duratinon, timeout } in msec
3631 * @deadline: deadline jiffies for the operation
3633 * SATA phy-reset @link using DET bits of SControl register.
3636 * Kernel thread context (may sleep)
3639 * 0 on success, -errno otherwise.
3641 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3642 unsigned long deadline
)
3649 if (sata_set_spd_needed(link
)) {
3650 /* SATA spec says nothing about how to reconfigure
3651 * spd. To be on the safe side, turn off phy during
3652 * reconfiguration. This works for at least ICH7 AHCI
3655 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3658 scontrol
= (scontrol
& 0x0f0) | 0x304;
3660 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3666 /* issue phy wake/reset */
3667 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3670 scontrol
= (scontrol
& 0x0f0) | 0x301;
3672 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3675 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3676 * 10.4.2 says at least 1 ms.
3680 /* bring link back */
3681 rc
= sata_link_resume(link
, timing
, deadline
);
3683 DPRINTK("EXIT, rc=%d\n", rc
);
3688 * sata_std_hardreset - reset host port via SATA phy reset
3689 * @link: link to reset
3690 * @class: resulting class of attached device
3691 * @deadline: deadline jiffies for the operation
3693 * SATA phy-reset host port using DET bits of SControl register,
3694 * wait for !BSY and classify the attached device.
3697 * Kernel thread context (may sleep)
3700 * 0 on success, -errno otherwise.
3702 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3703 unsigned long deadline
)
3705 struct ata_port
*ap
= link
->ap
;
3706 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3712 rc
= sata_link_hardreset(link
, timing
, deadline
);
3714 ata_link_printk(link
, KERN_ERR
,
3715 "COMRESET failed (errno=%d)\n", rc
);
3719 /* TODO: phy layer with polling, timeouts, etc. */
3720 if (ata_link_offline(link
)) {
3721 *class = ATA_DEV_NONE
;
3722 DPRINTK("EXIT, link offline\n");
3726 /* wait a while before checking status */
3727 ata_wait_after_reset(ap
, deadline
);
3729 /* If PMP is supported, we have to do follow-up SRST. Note
3730 * that some PMPs don't send D2H Reg FIS after hardreset at
3731 * all if the first port is empty. Wait for it just for a
3732 * second and request follow-up SRST.
3734 if (ap
->flags
& ATA_FLAG_PMP
) {
3735 ata_wait_ready(ap
, jiffies
+ HZ
);
3739 rc
= ata_wait_ready(ap
, deadline
);
3740 /* link occupied, -ENODEV too is an error */
3742 ata_link_printk(link
, KERN_ERR
,
3743 "COMRESET failed (errno=%d)\n", rc
);
3747 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3749 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3751 DPRINTK("EXIT, class=%u\n", *class);
3756 * ata_std_postreset - standard postreset callback
3757 * @link: the target ata_link
3758 * @classes: classes of attached devices
3760 * This function is invoked after a successful reset. Note that
3761 * the device might have been reset more than once using
3762 * different reset methods before postreset is invoked.
3765 * Kernel thread context (may sleep)
3767 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3769 struct ata_port
*ap
= link
->ap
;
3774 /* print link status */
3775 sata_print_link_status(link
);
3778 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3779 sata_scr_write(link
, SCR_ERROR
, serror
);
3781 /* is double-select really necessary? */
3782 if (classes
[0] != ATA_DEV_NONE
)
3783 ap
->ops
->dev_select(ap
, 1);
3784 if (classes
[1] != ATA_DEV_NONE
)
3785 ap
->ops
->dev_select(ap
, 0);
3787 /* bail out if no device is present */
3788 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3789 DPRINTK("EXIT, no device\n");
3793 /* set up device control */
3794 if (ap
->ioaddr
.ctl_addr
)
3795 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3801 * ata_dev_same_device - Determine whether new ID matches configured device
3802 * @dev: device to compare against
3803 * @new_class: class of the new device
3804 * @new_id: IDENTIFY page of the new device
3806 * Compare @new_class and @new_id against @dev and determine
3807 * whether @dev is the device indicated by @new_class and
3814 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3816 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3819 const u16
*old_id
= dev
->id
;
3820 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3821 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3823 if (dev
->class != new_class
) {
3824 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3825 dev
->class, new_class
);
3829 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3830 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3831 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3832 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3834 if (strcmp(model
[0], model
[1])) {
3835 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3836 "'%s' != '%s'\n", model
[0], model
[1]);
3840 if (strcmp(serial
[0], serial
[1])) {
3841 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3842 "'%s' != '%s'\n", serial
[0], serial
[1]);
3850 * ata_dev_reread_id - Re-read IDENTIFY data
3851 * @dev: target ATA device
3852 * @readid_flags: read ID flags
3854 * Re-read IDENTIFY page and make sure @dev is still attached to
3858 * Kernel thread context (may sleep)
3861 * 0 on success, negative errno otherwise
3863 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3865 unsigned int class = dev
->class;
3866 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3870 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3874 /* is the device still there? */
3875 if (!ata_dev_same_device(dev
, class, id
))
3878 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3883 * ata_dev_revalidate - Revalidate ATA device
3884 * @dev: device to revalidate
3885 * @new_class: new class code
3886 * @readid_flags: read ID flags
3888 * Re-read IDENTIFY page, make sure @dev is still attached to the
3889 * port and reconfigure it according to the new IDENTIFY page.
3892 * Kernel thread context (may sleep)
3895 * 0 on success, negative errno otherwise
3897 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3898 unsigned int readid_flags
)
3900 u64 n_sectors
= dev
->n_sectors
;
3903 if (!ata_dev_enabled(dev
))
3906 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3907 if (ata_class_enabled(new_class
) &&
3908 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3909 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3910 dev
->class, new_class
);
3916 rc
= ata_dev_reread_id(dev
, readid_flags
);
3920 /* configure device according to the new ID */
3921 rc
= ata_dev_configure(dev
);
3925 /* verify n_sectors hasn't changed */
3926 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3927 dev
->n_sectors
!= n_sectors
) {
3928 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3930 (unsigned long long)n_sectors
,
3931 (unsigned long long)dev
->n_sectors
);
3933 /* restore original n_sectors */
3934 dev
->n_sectors
= n_sectors
;
3943 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3947 struct ata_blacklist_entry
{
3948 const char *model_num
;
3949 const char *model_rev
;
3950 unsigned long horkage
;
3953 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3954 /* Devices with DMA related problems under Linux */
3955 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3956 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3957 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3958 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3959 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3960 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3961 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3962 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3963 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3964 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3965 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3966 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3967 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3968 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3969 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3970 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3971 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3972 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3973 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3974 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3975 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3976 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3977 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3978 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3979 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3980 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3981 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3982 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3983 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3984 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3985 /* Odd clown on sil3726/4726 PMPs */
3986 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
3987 ATA_HORKAGE_SKIP_PM
},
3989 /* Weird ATAPI devices */
3990 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3992 /* Devices we expect to fail diagnostics */
3994 /* Devices where NCQ should be avoided */
3996 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3997 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3998 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4000 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4001 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4002 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
4003 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
4004 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4006 /* Blacklist entries taken from Silicon Image 3124/3132
4007 Windows driver .inf file - also several Linux problem reports */
4008 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4009 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4010 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4011 /* Drives which do spurious command completion */
4012 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
4013 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
4014 { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ
, },
4015 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
4016 { "Hitachi HTS542525K9SA00", "BBFOC31P", ATA_HORKAGE_NONCQ
, },
4017 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4018 { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ
, },
4019 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
4020 { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
4021 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
4022 { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ
, },
4023 { "ST9160821AS", "3.CCD", ATA_HORKAGE_NONCQ
, },
4024 { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ
, },
4025 { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ
, },
4026 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
4028 /* devices which puke on READ_NATIVE_MAX */
4029 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4030 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4031 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4032 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4034 /* Devices which report 1 sector over size HPA */
4035 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4036 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4042 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4048 * check for trailing wildcard: *\0
4050 p
= strchr(patt
, wildchar
);
4051 if (p
&& ((*(p
+ 1)) == 0))
4062 return strncmp(patt
, name
, len
);
4065 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4067 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4068 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4069 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4071 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4072 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4074 while (ad
->model_num
) {
4075 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4076 if (ad
->model_rev
== NULL
)
4078 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4086 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4088 /* We don't support polling DMA.
4089 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4090 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4092 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4093 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4095 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4099 * ata_dev_xfermask - Compute supported xfermask of the given device
4100 * @dev: Device to compute xfermask for
4102 * Compute supported xfermask of @dev and store it in
4103 * dev->*_mask. This function is responsible for applying all
4104 * known limits including host controller limits, device
4110 static void ata_dev_xfermask(struct ata_device
*dev
)
4112 struct ata_link
*link
= dev
->link
;
4113 struct ata_port
*ap
= link
->ap
;
4114 struct ata_host
*host
= ap
->host
;
4115 unsigned long xfer_mask
;
4117 /* controller modes available */
4118 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4119 ap
->mwdma_mask
, ap
->udma_mask
);
4121 /* drive modes available */
4122 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4123 dev
->mwdma_mask
, dev
->udma_mask
);
4124 xfer_mask
&= ata_id_xfermask(dev
->id
);
4127 * CFA Advanced TrueIDE timings are not allowed on a shared
4130 if (ata_dev_pair(dev
)) {
4131 /* No PIO5 or PIO6 */
4132 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4133 /* No MWDMA3 or MWDMA 4 */
4134 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4137 if (ata_dma_blacklisted(dev
)) {
4138 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4139 ata_dev_printk(dev
, KERN_WARNING
,
4140 "device is on DMA blacklist, disabling DMA\n");
4143 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4144 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4145 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4146 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4147 "other device, disabling DMA\n");
4150 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4151 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4153 if (ap
->ops
->mode_filter
)
4154 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4156 /* Apply cable rule here. Don't apply it early because when
4157 * we handle hot plug the cable type can itself change.
4158 * Check this last so that we know if the transfer rate was
4159 * solely limited by the cable.
4160 * Unknown or 80 wire cables reported host side are checked
4161 * drive side as well. Cases where we know a 40wire cable
4162 * is used safely for 80 are not checked here.
4164 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4165 /* UDMA/44 or higher would be available */
4166 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4167 (ata_drive_40wire(dev
->id
) &&
4168 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4169 ap
->cbl
== ATA_CBL_PATA80
))) {
4170 ata_dev_printk(dev
, KERN_WARNING
,
4171 "limited to UDMA/33 due to 40-wire cable\n");
4172 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4175 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4176 &dev
->mwdma_mask
, &dev
->udma_mask
);
4180 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4181 * @dev: Device to which command will be sent
4183 * Issue SET FEATURES - XFER MODE command to device @dev
4187 * PCI/etc. bus probe sem.
4190 * 0 on success, AC_ERR_* mask otherwise.
4193 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4195 struct ata_taskfile tf
;
4196 unsigned int err_mask
;
4198 /* set up set-features taskfile */
4199 DPRINTK("set features - xfer mode\n");
4201 /* Some controllers and ATAPI devices show flaky interrupt
4202 * behavior after setting xfer mode. Use polling instead.
4204 ata_tf_init(dev
, &tf
);
4205 tf
.command
= ATA_CMD_SET_FEATURES
;
4206 tf
.feature
= SETFEATURES_XFER
;
4207 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4208 tf
.protocol
= ATA_PROT_NODATA
;
4209 tf
.nsect
= dev
->xfer_mode
;
4211 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4213 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4217 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4218 * @dev: Device to which command will be sent
4219 * @enable: Whether to enable or disable the feature
4220 * @feature: The sector count represents the feature to set
4222 * Issue SET FEATURES - SATA FEATURES command to device @dev
4223 * on port @ap with sector count
4226 * PCI/etc. bus probe sem.
4229 * 0 on success, AC_ERR_* mask otherwise.
4231 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4234 struct ata_taskfile tf
;
4235 unsigned int err_mask
;
4237 /* set up set-features taskfile */
4238 DPRINTK("set features - SATA features\n");
4240 ata_tf_init(dev
, &tf
);
4241 tf
.command
= ATA_CMD_SET_FEATURES
;
4242 tf
.feature
= enable
;
4243 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4244 tf
.protocol
= ATA_PROT_NODATA
;
4247 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4249 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4254 * ata_dev_init_params - Issue INIT DEV PARAMS command
4255 * @dev: Device to which command will be sent
4256 * @heads: Number of heads (taskfile parameter)
4257 * @sectors: Number of sectors (taskfile parameter)
4260 * Kernel thread context (may sleep)
4263 * 0 on success, AC_ERR_* mask otherwise.
4265 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4266 u16 heads
, u16 sectors
)
4268 struct ata_taskfile tf
;
4269 unsigned int err_mask
;
4271 /* Number of sectors per track 1-255. Number of heads 1-16 */
4272 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4273 return AC_ERR_INVALID
;
4275 /* set up init dev params taskfile */
4276 DPRINTK("init dev params \n");
4278 ata_tf_init(dev
, &tf
);
4279 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4280 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4281 tf
.protocol
= ATA_PROT_NODATA
;
4283 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4285 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4286 /* A clean abort indicates an original or just out of spec drive
4287 and we should continue as we issue the setup based on the
4288 drive reported working geometry */
4289 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4292 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4297 * ata_sg_clean - Unmap DMA memory associated with command
4298 * @qc: Command containing DMA memory to be released
4300 * Unmap all mapped DMA memory associated with this command.
4303 * spin_lock_irqsave(host lock)
4305 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4307 struct ata_port
*ap
= qc
->ap
;
4308 struct scatterlist
*sg
= qc
->__sg
;
4309 int dir
= qc
->dma_dir
;
4310 void *pad_buf
= NULL
;
4312 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4313 WARN_ON(sg
== NULL
);
4315 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4316 WARN_ON(qc
->n_elem
> 1);
4318 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4320 /* if we padded the buffer out to 32-bit bound, and data
4321 * xfer direction is from-device, we must copy from the
4322 * pad buffer back into the supplied buffer
4324 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4325 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4327 if (qc
->flags
& ATA_QCFLAG_SG
) {
4329 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4330 /* restore last sg */
4331 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4333 struct scatterlist
*psg
= &qc
->pad_sgent
;
4334 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4335 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4336 kunmap_atomic(addr
, KM_IRQ0
);
4340 dma_unmap_single(ap
->dev
,
4341 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4344 sg
->length
+= qc
->pad_len
;
4346 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4347 pad_buf
, qc
->pad_len
);
4350 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4355 * ata_fill_sg - Fill PCI IDE PRD table
4356 * @qc: Metadata associated with taskfile to be transferred
4358 * Fill PCI IDE PRD (scatter-gather) table with segments
4359 * associated with the current disk command.
4362 * spin_lock_irqsave(host lock)
4365 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4367 struct ata_port
*ap
= qc
->ap
;
4368 struct scatterlist
*sg
;
4371 WARN_ON(qc
->__sg
== NULL
);
4372 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4375 ata_for_each_sg(sg
, qc
) {
4379 /* determine if physical DMA addr spans 64K boundary.
4380 * Note h/w doesn't support 64-bit, so we unconditionally
4381 * truncate dma_addr_t to u32.
4383 addr
= (u32
) sg_dma_address(sg
);
4384 sg_len
= sg_dma_len(sg
);
4387 offset
= addr
& 0xffff;
4389 if ((offset
+ sg_len
) > 0x10000)
4390 len
= 0x10000 - offset
;
4392 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4393 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4394 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4403 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4407 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4408 * @qc: Metadata associated with taskfile to be transferred
4410 * Fill PCI IDE PRD (scatter-gather) table with segments
4411 * associated with the current disk command. Perform the fill
4412 * so that we avoid writing any length 64K records for
4413 * controllers that don't follow the spec.
4416 * spin_lock_irqsave(host lock)
4419 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4421 struct ata_port
*ap
= qc
->ap
;
4422 struct scatterlist
*sg
;
4425 WARN_ON(qc
->__sg
== NULL
);
4426 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4429 ata_for_each_sg(sg
, qc
) {
4431 u32 sg_len
, len
, blen
;
4433 /* determine if physical DMA addr spans 64K boundary.
4434 * Note h/w doesn't support 64-bit, so we unconditionally
4435 * truncate dma_addr_t to u32.
4437 addr
= (u32
) sg_dma_address(sg
);
4438 sg_len
= sg_dma_len(sg
);
4441 offset
= addr
& 0xffff;
4443 if ((offset
+ sg_len
) > 0x10000)
4444 len
= 0x10000 - offset
;
4446 blen
= len
& 0xffff;
4447 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4449 /* Some PATA chipsets like the CS5530 can't
4450 cope with 0x0000 meaning 64K as the spec says */
4451 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4453 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4455 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4456 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4465 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4469 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4470 * @qc: Metadata associated with taskfile to check
4472 * Allow low-level driver to filter ATA PACKET commands, returning
4473 * a status indicating whether or not it is OK to use DMA for the
4474 * supplied PACKET command.
4477 * spin_lock_irqsave(host lock)
4479 * RETURNS: 0 when ATAPI DMA can be used
4482 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4484 struct ata_port
*ap
= qc
->ap
;
4486 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4487 * few ATAPI devices choke on such DMA requests.
4489 if (unlikely(qc
->nbytes
& 15))
4492 if (ap
->ops
->check_atapi_dma
)
4493 return ap
->ops
->check_atapi_dma(qc
);
4499 * ata_std_qc_defer - Check whether a qc needs to be deferred
4500 * @qc: ATA command in question
4502 * Non-NCQ commands cannot run with any other command, NCQ or
4503 * not. As upper layer only knows the queue depth, we are
4504 * responsible for maintaining exclusion. This function checks
4505 * whether a new command @qc can be issued.
4508 * spin_lock_irqsave(host lock)
4511 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4513 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4515 struct ata_link
*link
= qc
->dev
->link
;
4517 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4518 if (!ata_tag_valid(link
->active_tag
))
4521 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4525 return ATA_DEFER_LINK
;
4529 * ata_qc_prep - Prepare taskfile for submission
4530 * @qc: Metadata associated with taskfile to be prepared
4532 * Prepare ATA taskfile for submission.
4535 * spin_lock_irqsave(host lock)
4537 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4539 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4546 * ata_dumb_qc_prep - Prepare taskfile for submission
4547 * @qc: Metadata associated with taskfile to be prepared
4549 * Prepare ATA taskfile for submission.
4552 * spin_lock_irqsave(host lock)
4554 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4556 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4559 ata_fill_sg_dumb(qc
);
4562 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4565 * ata_sg_init_one - Associate command with memory buffer
4566 * @qc: Command to be associated
4567 * @buf: Memory buffer
4568 * @buflen: Length of memory buffer, in bytes.
4570 * Initialize the data-related elements of queued_cmd @qc
4571 * to point to a single memory buffer, @buf of byte length @buflen.
4574 * spin_lock_irqsave(host lock)
4577 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4579 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4581 qc
->__sg
= &qc
->sgent
;
4583 qc
->orig_n_elem
= 1;
4585 qc
->nbytes
= buflen
;
4586 qc
->cursg
= qc
->__sg
;
4588 sg_init_one(&qc
->sgent
, buf
, buflen
);
4592 * ata_sg_init - Associate command with scatter-gather table.
4593 * @qc: Command to be associated
4594 * @sg: Scatter-gather table.
4595 * @n_elem: Number of elements in s/g table.
4597 * Initialize the data-related elements of queued_cmd @qc
4598 * to point to a scatter-gather table @sg, containing @n_elem
4602 * spin_lock_irqsave(host lock)
4605 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4606 unsigned int n_elem
)
4608 qc
->flags
|= ATA_QCFLAG_SG
;
4610 qc
->n_elem
= n_elem
;
4611 qc
->orig_n_elem
= n_elem
;
4612 qc
->cursg
= qc
->__sg
;
4616 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4617 * @qc: Command with memory buffer to be mapped.
4619 * DMA-map the memory buffer associated with queued_cmd @qc.
4622 * spin_lock_irqsave(host lock)
4625 * Zero on success, negative on error.
4628 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4630 struct ata_port
*ap
= qc
->ap
;
4631 int dir
= qc
->dma_dir
;
4632 struct scatterlist
*sg
= qc
->__sg
;
4633 dma_addr_t dma_address
;
4636 /* we must lengthen transfers to end on a 32-bit boundary */
4637 qc
->pad_len
= sg
->length
& 3;
4639 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4640 struct scatterlist
*psg
= &qc
->pad_sgent
;
4642 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4644 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4646 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4647 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4650 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4651 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4653 sg
->length
-= qc
->pad_len
;
4654 if (sg
->length
== 0)
4657 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4658 sg
->length
, qc
->pad_len
);
4666 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4668 if (dma_mapping_error(dma_address
)) {
4670 sg
->length
+= qc
->pad_len
;
4674 sg_dma_address(sg
) = dma_address
;
4675 sg_dma_len(sg
) = sg
->length
;
4678 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4679 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4685 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4686 * @qc: Command with scatter-gather table to be mapped.
4688 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4691 * spin_lock_irqsave(host lock)
4694 * Zero on success, negative on error.
4698 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4700 struct ata_port
*ap
= qc
->ap
;
4701 struct scatterlist
*sg
= qc
->__sg
;
4702 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4703 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4705 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4706 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4708 /* we must lengthen transfers to end on a 32-bit boundary */
4709 qc
->pad_len
= lsg
->length
& 3;
4711 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4712 struct scatterlist
*psg
= &qc
->pad_sgent
;
4713 unsigned int offset
;
4715 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4717 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4720 * psg->page/offset are used to copy to-be-written
4721 * data in this function or read data in ata_sg_clean.
4723 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4724 sg_set_page(psg
, nth_page(sg_page(lsg
), offset
>> PAGE_SHIFT
),
4725 qc
->pad_len
, offset_in_page(offset
));
4727 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4728 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4729 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4730 kunmap_atomic(addr
, KM_IRQ0
);
4733 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4734 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4736 lsg
->length
-= qc
->pad_len
;
4737 if (lsg
->length
== 0)
4740 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4741 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4744 pre_n_elem
= qc
->n_elem
;
4745 if (trim_sg
&& pre_n_elem
)
4754 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4756 /* restore last sg */
4757 lsg
->length
+= qc
->pad_len
;
4761 DPRINTK("%d sg elements mapped\n", n_elem
);
4764 qc
->n_elem
= n_elem
;
4770 * swap_buf_le16 - swap halves of 16-bit words in place
4771 * @buf: Buffer to swap
4772 * @buf_words: Number of 16-bit words in buffer.
4774 * Swap halves of 16-bit words if needed to convert from
4775 * little-endian byte order to native cpu byte order, or
4779 * Inherited from caller.
4781 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4786 for (i
= 0; i
< buf_words
; i
++)
4787 buf
[i
] = le16_to_cpu(buf
[i
]);
4788 #endif /* __BIG_ENDIAN */
4792 * ata_data_xfer - Transfer data by PIO
4793 * @adev: device to target
4795 * @buflen: buffer length
4796 * @write_data: read/write
4798 * Transfer data from/to the device data register by PIO.
4801 * Inherited from caller.
4803 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4804 unsigned int buflen
, int write_data
)
4806 struct ata_port
*ap
= adev
->link
->ap
;
4807 unsigned int words
= buflen
>> 1;
4809 /* Transfer multiple of 2 bytes */
4811 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4813 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4815 /* Transfer trailing 1 byte, if any. */
4816 if (unlikely(buflen
& 0x01)) {
4817 u16 align_buf
[1] = { 0 };
4818 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4821 memcpy(align_buf
, trailing_buf
, 1);
4822 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4824 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4825 memcpy(trailing_buf
, align_buf
, 1);
4831 * ata_data_xfer_noirq - Transfer data by PIO
4832 * @adev: device to target
4834 * @buflen: buffer length
4835 * @write_data: read/write
4837 * Transfer data from/to the device data register by PIO. Do the
4838 * transfer with interrupts disabled.
4841 * Inherited from caller.
4843 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4844 unsigned int buflen
, int write_data
)
4846 unsigned long flags
;
4847 local_irq_save(flags
);
4848 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4849 local_irq_restore(flags
);
4854 * ata_pio_sector - Transfer a sector of data.
4855 * @qc: Command on going
4857 * Transfer qc->sect_size bytes of data from/to the ATA device.
4860 * Inherited from caller.
4863 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4865 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4866 struct ata_port
*ap
= qc
->ap
;
4868 unsigned int offset
;
4871 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4872 ap
->hsm_task_state
= HSM_ST_LAST
;
4874 page
= sg_page(qc
->cursg
);
4875 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
4877 /* get the current page and offset */
4878 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4879 offset
%= PAGE_SIZE
;
4881 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4883 if (PageHighMem(page
)) {
4884 unsigned long flags
;
4886 /* FIXME: use a bounce buffer */
4887 local_irq_save(flags
);
4888 buf
= kmap_atomic(page
, KM_IRQ0
);
4890 /* do the actual data transfer */
4891 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4893 kunmap_atomic(buf
, KM_IRQ0
);
4894 local_irq_restore(flags
);
4896 buf
= page_address(page
);
4897 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4900 qc
->curbytes
+= qc
->sect_size
;
4901 qc
->cursg_ofs
+= qc
->sect_size
;
4903 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
4904 qc
->cursg
= sg_next(qc
->cursg
);
4910 * ata_pio_sectors - Transfer one or many sectors.
4911 * @qc: Command on going
4913 * Transfer one or many sectors of data from/to the
4914 * ATA device for the DRQ request.
4917 * Inherited from caller.
4920 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4922 if (is_multi_taskfile(&qc
->tf
)) {
4923 /* READ/WRITE MULTIPLE */
4926 WARN_ON(qc
->dev
->multi_count
== 0);
4928 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4929 qc
->dev
->multi_count
);
4935 ata_altstatus(qc
->ap
); /* flush */
4939 * atapi_send_cdb - Write CDB bytes to hardware
4940 * @ap: Port to which ATAPI device is attached.
4941 * @qc: Taskfile currently active
4943 * When device has indicated its readiness to accept
4944 * a CDB, this function is called. Send the CDB.
4950 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4953 DPRINTK("send cdb\n");
4954 WARN_ON(qc
->dev
->cdb_len
< 12);
4956 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4957 ata_altstatus(ap
); /* flush */
4959 switch (qc
->tf
.protocol
) {
4960 case ATA_PROT_ATAPI
:
4961 ap
->hsm_task_state
= HSM_ST
;
4963 case ATA_PROT_ATAPI_NODATA
:
4964 ap
->hsm_task_state
= HSM_ST_LAST
;
4966 case ATA_PROT_ATAPI_DMA
:
4967 ap
->hsm_task_state
= HSM_ST_LAST
;
4968 /* initiate bmdma */
4969 ap
->ops
->bmdma_start(qc
);
4975 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4976 * @qc: Command on going
4977 * @bytes: number of bytes
4979 * Transfer Transfer data from/to the ATAPI device.
4982 * Inherited from caller.
4986 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4988 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4989 struct scatterlist
*sg
= qc
->__sg
;
4990 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4991 struct ata_port
*ap
= qc
->ap
;
4994 unsigned int offset
, count
;
4997 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4998 ap
->hsm_task_state
= HSM_ST_LAST
;
5001 if (unlikely(no_more_sg
)) {
5003 * The end of qc->sg is reached and the device expects
5004 * more data to transfer. In order not to overrun qc->sg
5005 * and fulfill length specified in the byte count register,
5006 * - for read case, discard trailing data from the device
5007 * - for write case, padding zero data to the device
5009 u16 pad_buf
[1] = { 0 };
5010 unsigned int words
= bytes
>> 1;
5013 if (words
) /* warning if bytes > 1 */
5014 ata_dev_printk(qc
->dev
, KERN_WARNING
,
5015 "%u bytes trailing data\n", bytes
);
5017 for (i
= 0; i
< words
; i
++)
5018 ap
->ops
->data_xfer(qc
->dev
, (unsigned char *)pad_buf
, 2, do_write
);
5020 ap
->hsm_task_state
= HSM_ST_LAST
;
5027 offset
= sg
->offset
+ qc
->cursg_ofs
;
5029 /* get the current page and offset */
5030 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5031 offset
%= PAGE_SIZE
;
5033 /* don't overrun current sg */
5034 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5036 /* don't cross page boundaries */
5037 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5039 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5041 if (PageHighMem(page
)) {
5042 unsigned long flags
;
5044 /* FIXME: use bounce buffer */
5045 local_irq_save(flags
);
5046 buf
= kmap_atomic(page
, KM_IRQ0
);
5048 /* do the actual data transfer */
5049 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5051 kunmap_atomic(buf
, KM_IRQ0
);
5052 local_irq_restore(flags
);
5054 buf
= page_address(page
);
5055 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5059 qc
->curbytes
+= count
;
5060 qc
->cursg_ofs
+= count
;
5062 if (qc
->cursg_ofs
== sg
->length
) {
5063 if (qc
->cursg
== lsg
)
5066 qc
->cursg
= sg_next(qc
->cursg
);
5075 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5076 * @qc: Command on going
5078 * Transfer Transfer data from/to the ATAPI device.
5081 * Inherited from caller.
5084 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5086 struct ata_port
*ap
= qc
->ap
;
5087 struct ata_device
*dev
= qc
->dev
;
5088 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5089 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5091 /* Abuse qc->result_tf for temp storage of intermediate TF
5092 * here to save some kernel stack usage.
5093 * For normal completion, qc->result_tf is not relevant. For
5094 * error, qc->result_tf is later overwritten by ata_qc_complete().
5095 * So, the correctness of qc->result_tf is not affected.
5097 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5098 ireason
= qc
->result_tf
.nsect
;
5099 bc_lo
= qc
->result_tf
.lbam
;
5100 bc_hi
= qc
->result_tf
.lbah
;
5101 bytes
= (bc_hi
<< 8) | bc_lo
;
5103 /* shall be cleared to zero, indicating xfer of data */
5104 if (ireason
& (1 << 0))
5107 /* make sure transfer direction matches expected */
5108 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5109 if (do_write
!= i_write
)
5112 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5114 __atapi_pio_bytes(qc
, bytes
);
5115 ata_altstatus(ap
); /* flush */
5120 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5121 qc
->err_mask
|= AC_ERR_HSM
;
5122 ap
->hsm_task_state
= HSM_ST_ERR
;
5126 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5127 * @ap: the target ata_port
5131 * 1 if ok in workqueue, 0 otherwise.
5134 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5136 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5139 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5140 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5141 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5144 if (is_atapi_taskfile(&qc
->tf
) &&
5145 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5153 * ata_hsm_qc_complete - finish a qc running on standard HSM
5154 * @qc: Command to complete
5155 * @in_wq: 1 if called from workqueue, 0 otherwise
5157 * Finish @qc which is running on standard HSM.
5160 * If @in_wq is zero, spin_lock_irqsave(host lock).
5161 * Otherwise, none on entry and grabs host lock.
5163 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5165 struct ata_port
*ap
= qc
->ap
;
5166 unsigned long flags
;
5168 if (ap
->ops
->error_handler
) {
5170 spin_lock_irqsave(ap
->lock
, flags
);
5172 /* EH might have kicked in while host lock is
5175 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5177 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5178 ap
->ops
->irq_on(ap
);
5179 ata_qc_complete(qc
);
5181 ata_port_freeze(ap
);
5184 spin_unlock_irqrestore(ap
->lock
, flags
);
5186 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5187 ata_qc_complete(qc
);
5189 ata_port_freeze(ap
);
5193 spin_lock_irqsave(ap
->lock
, flags
);
5194 ap
->ops
->irq_on(ap
);
5195 ata_qc_complete(qc
);
5196 spin_unlock_irqrestore(ap
->lock
, flags
);
5198 ata_qc_complete(qc
);
5203 * ata_hsm_move - move the HSM to the next state.
5204 * @ap: the target ata_port
5206 * @status: current device status
5207 * @in_wq: 1 if called from workqueue, 0 otherwise
5210 * 1 when poll next status needed, 0 otherwise.
5212 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5213 u8 status
, int in_wq
)
5215 unsigned long flags
= 0;
5218 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5220 /* Make sure ata_qc_issue_prot() does not throw things
5221 * like DMA polling into the workqueue. Notice that
5222 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5224 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5227 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5228 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5230 switch (ap
->hsm_task_state
) {
5232 /* Send first data block or PACKET CDB */
5234 /* If polling, we will stay in the work queue after
5235 * sending the data. Otherwise, interrupt handler
5236 * takes over after sending the data.
5238 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5240 /* check device status */
5241 if (unlikely((status
& ATA_DRQ
) == 0)) {
5242 /* handle BSY=0, DRQ=0 as error */
5243 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5244 /* device stops HSM for abort/error */
5245 qc
->err_mask
|= AC_ERR_DEV
;
5247 /* HSM violation. Let EH handle this */
5248 qc
->err_mask
|= AC_ERR_HSM
;
5250 ap
->hsm_task_state
= HSM_ST_ERR
;
5254 /* Device should not ask for data transfer (DRQ=1)
5255 * when it finds something wrong.
5256 * We ignore DRQ here and stop the HSM by
5257 * changing hsm_task_state to HSM_ST_ERR and
5258 * let the EH abort the command or reset the device.
5260 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5261 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5262 "error, dev_stat 0x%X\n", status
);
5263 qc
->err_mask
|= AC_ERR_HSM
;
5264 ap
->hsm_task_state
= HSM_ST_ERR
;
5268 /* Send the CDB (atapi) or the first data block (ata pio out).
5269 * During the state transition, interrupt handler shouldn't
5270 * be invoked before the data transfer is complete and
5271 * hsm_task_state is changed. Hence, the following locking.
5274 spin_lock_irqsave(ap
->lock
, flags
);
5276 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5277 /* PIO data out protocol.
5278 * send first data block.
5281 /* ata_pio_sectors() might change the state
5282 * to HSM_ST_LAST. so, the state is changed here
5283 * before ata_pio_sectors().
5285 ap
->hsm_task_state
= HSM_ST
;
5286 ata_pio_sectors(qc
);
5289 atapi_send_cdb(ap
, qc
);
5292 spin_unlock_irqrestore(ap
->lock
, flags
);
5294 /* if polling, ata_pio_task() handles the rest.
5295 * otherwise, interrupt handler takes over from here.
5300 /* complete command or read/write the data register */
5301 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5302 /* ATAPI PIO protocol */
5303 if ((status
& ATA_DRQ
) == 0) {
5304 /* No more data to transfer or device error.
5305 * Device error will be tagged in HSM_ST_LAST.
5307 ap
->hsm_task_state
= HSM_ST_LAST
;
5311 /* Device should not ask for data transfer (DRQ=1)
5312 * when it finds something wrong.
5313 * We ignore DRQ here and stop the HSM by
5314 * changing hsm_task_state to HSM_ST_ERR and
5315 * let the EH abort the command or reset the device.
5317 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5318 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5319 "device error, dev_stat 0x%X\n",
5321 qc
->err_mask
|= AC_ERR_HSM
;
5322 ap
->hsm_task_state
= HSM_ST_ERR
;
5326 atapi_pio_bytes(qc
);
5328 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5329 /* bad ireason reported by device */
5333 /* ATA PIO protocol */
5334 if (unlikely((status
& ATA_DRQ
) == 0)) {
5335 /* handle BSY=0, DRQ=0 as error */
5336 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5337 /* device stops HSM for abort/error */
5338 qc
->err_mask
|= AC_ERR_DEV
;
5340 /* HSM violation. Let EH handle this.
5341 * Phantom devices also trigger this
5342 * condition. Mark hint.
5344 qc
->err_mask
|= AC_ERR_HSM
|
5347 ap
->hsm_task_state
= HSM_ST_ERR
;
5351 /* For PIO reads, some devices may ask for
5352 * data transfer (DRQ=1) alone with ERR=1.
5353 * We respect DRQ here and transfer one
5354 * block of junk data before changing the
5355 * hsm_task_state to HSM_ST_ERR.
5357 * For PIO writes, ERR=1 DRQ=1 doesn't make
5358 * sense since the data block has been
5359 * transferred to the device.
5361 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5362 /* data might be corrputed */
5363 qc
->err_mask
|= AC_ERR_DEV
;
5365 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5366 ata_pio_sectors(qc
);
5367 status
= ata_wait_idle(ap
);
5370 if (status
& (ATA_BUSY
| ATA_DRQ
))
5371 qc
->err_mask
|= AC_ERR_HSM
;
5373 /* ata_pio_sectors() might change the
5374 * state to HSM_ST_LAST. so, the state
5375 * is changed after ata_pio_sectors().
5377 ap
->hsm_task_state
= HSM_ST_ERR
;
5381 ata_pio_sectors(qc
);
5383 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5384 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5386 status
= ata_wait_idle(ap
);
5395 if (unlikely(!ata_ok(status
))) {
5396 qc
->err_mask
|= __ac_err_mask(status
);
5397 ap
->hsm_task_state
= HSM_ST_ERR
;
5401 /* no more data to transfer */
5402 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5403 ap
->print_id
, qc
->dev
->devno
, status
);
5405 WARN_ON(qc
->err_mask
);
5407 ap
->hsm_task_state
= HSM_ST_IDLE
;
5409 /* complete taskfile transaction */
5410 ata_hsm_qc_complete(qc
, in_wq
);
5416 /* make sure qc->err_mask is available to
5417 * know what's wrong and recover
5419 WARN_ON(qc
->err_mask
== 0);
5421 ap
->hsm_task_state
= HSM_ST_IDLE
;
5423 /* complete taskfile transaction */
5424 ata_hsm_qc_complete(qc
, in_wq
);
5436 static void ata_pio_task(struct work_struct
*work
)
5438 struct ata_port
*ap
=
5439 container_of(work
, struct ata_port
, port_task
.work
);
5440 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5445 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5448 * This is purely heuristic. This is a fast path.
5449 * Sometimes when we enter, BSY will be cleared in
5450 * a chk-status or two. If not, the drive is probably seeking
5451 * or something. Snooze for a couple msecs, then
5452 * chk-status again. If still busy, queue delayed work.
5454 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5455 if (status
& ATA_BUSY
) {
5457 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5458 if (status
& ATA_BUSY
) {
5459 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5465 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5467 /* another command or interrupt handler
5468 * may be running at this point.
5475 * ata_qc_new - Request an available ATA command, for queueing
5476 * @ap: Port associated with device @dev
5477 * @dev: Device from whom we request an available command structure
5483 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5485 struct ata_queued_cmd
*qc
= NULL
;
5488 /* no command while frozen */
5489 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5492 /* the last tag is reserved for internal command. */
5493 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5494 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5495 qc
= __ata_qc_from_tag(ap
, i
);
5506 * ata_qc_new_init - Request an available ATA command, and initialize it
5507 * @dev: Device from whom we request an available command structure
5513 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5515 struct ata_port
*ap
= dev
->link
->ap
;
5516 struct ata_queued_cmd
*qc
;
5518 qc
= ata_qc_new(ap
);
5531 * ata_qc_free - free unused ata_queued_cmd
5532 * @qc: Command to complete
5534 * Designed to free unused ata_queued_cmd object
5535 * in case something prevents using it.
5538 * spin_lock_irqsave(host lock)
5540 void ata_qc_free(struct ata_queued_cmd
*qc
)
5542 struct ata_port
*ap
= qc
->ap
;
5545 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5549 if (likely(ata_tag_valid(tag
))) {
5550 qc
->tag
= ATA_TAG_POISON
;
5551 clear_bit(tag
, &ap
->qc_allocated
);
5555 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5557 struct ata_port
*ap
= qc
->ap
;
5558 struct ata_link
*link
= qc
->dev
->link
;
5560 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5561 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5563 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5566 /* command should be marked inactive atomically with qc completion */
5567 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5568 link
->sactive
&= ~(1 << qc
->tag
);
5570 ap
->nr_active_links
--;
5572 link
->active_tag
= ATA_TAG_POISON
;
5573 ap
->nr_active_links
--;
5576 /* clear exclusive status */
5577 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5578 ap
->excl_link
== link
))
5579 ap
->excl_link
= NULL
;
5581 /* atapi: mark qc as inactive to prevent the interrupt handler
5582 * from completing the command twice later, before the error handler
5583 * is called. (when rc != 0 and atapi request sense is needed)
5585 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5586 ap
->qc_active
&= ~(1 << qc
->tag
);
5588 /* call completion callback */
5589 qc
->complete_fn(qc
);
5592 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5594 struct ata_port
*ap
= qc
->ap
;
5596 qc
->result_tf
.flags
= qc
->tf
.flags
;
5597 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5601 * ata_qc_complete - Complete an active ATA command
5602 * @qc: Command to complete
5603 * @err_mask: ATA Status register contents
5605 * Indicate to the mid and upper layers that an ATA
5606 * command has completed, with either an ok or not-ok status.
5609 * spin_lock_irqsave(host lock)
5611 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5613 struct ata_port
*ap
= qc
->ap
;
5615 /* XXX: New EH and old EH use different mechanisms to
5616 * synchronize EH with regular execution path.
5618 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5619 * Normal execution path is responsible for not accessing a
5620 * failed qc. libata core enforces the rule by returning NULL
5621 * from ata_qc_from_tag() for failed qcs.
5623 * Old EH depends on ata_qc_complete() nullifying completion
5624 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5625 * not synchronize with interrupt handler. Only PIO task is
5628 if (ap
->ops
->error_handler
) {
5629 struct ata_device
*dev
= qc
->dev
;
5630 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5632 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5634 if (unlikely(qc
->err_mask
))
5635 qc
->flags
|= ATA_QCFLAG_FAILED
;
5637 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5638 if (!ata_tag_internal(qc
->tag
)) {
5639 /* always fill result TF for failed qc */
5641 ata_qc_schedule_eh(qc
);
5646 /* read result TF if requested */
5647 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5650 /* Some commands need post-processing after successful
5653 switch (qc
->tf
.command
) {
5654 case ATA_CMD_SET_FEATURES
:
5655 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5656 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5659 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5660 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5661 /* revalidate device */
5662 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5663 ata_port_schedule_eh(ap
);
5667 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5671 __ata_qc_complete(qc
);
5673 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5676 /* read result TF if failed or requested */
5677 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5680 __ata_qc_complete(qc
);
5685 * ata_qc_complete_multiple - Complete multiple qcs successfully
5686 * @ap: port in question
5687 * @qc_active: new qc_active mask
5688 * @finish_qc: LLDD callback invoked before completing a qc
5690 * Complete in-flight commands. This functions is meant to be
5691 * called from low-level driver's interrupt routine to complete
5692 * requests normally. ap->qc_active and @qc_active is compared
5693 * and commands are completed accordingly.
5696 * spin_lock_irqsave(host lock)
5699 * Number of completed commands on success, -errno otherwise.
5701 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5702 void (*finish_qc
)(struct ata_queued_cmd
*))
5708 done_mask
= ap
->qc_active
^ qc_active
;
5710 if (unlikely(done_mask
& qc_active
)) {
5711 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5712 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5716 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5717 struct ata_queued_cmd
*qc
;
5719 if (!(done_mask
& (1 << i
)))
5722 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5725 ata_qc_complete(qc
);
5733 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5735 struct ata_port
*ap
= qc
->ap
;
5737 switch (qc
->tf
.protocol
) {
5740 case ATA_PROT_ATAPI_DMA
:
5743 case ATA_PROT_ATAPI
:
5745 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5758 * ata_qc_issue - issue taskfile to device
5759 * @qc: command to issue to device
5761 * Prepare an ATA command to submission to device.
5762 * This includes mapping the data into a DMA-able
5763 * area, filling in the S/G table, and finally
5764 * writing the taskfile to hardware, starting the command.
5767 * spin_lock_irqsave(host lock)
5769 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5771 struct ata_port
*ap
= qc
->ap
;
5772 struct ata_link
*link
= qc
->dev
->link
;
5774 /* Make sure only one non-NCQ command is outstanding. The
5775 * check is skipped for old EH because it reuses active qc to
5776 * request ATAPI sense.
5778 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5780 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5781 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5784 ap
->nr_active_links
++;
5785 link
->sactive
|= 1 << qc
->tag
;
5787 WARN_ON(link
->sactive
);
5789 ap
->nr_active_links
++;
5790 link
->active_tag
= qc
->tag
;
5793 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5794 ap
->qc_active
|= 1 << qc
->tag
;
5796 if (ata_should_dma_map(qc
)) {
5797 if (qc
->flags
& ATA_QCFLAG_SG
) {
5798 if (ata_sg_setup(qc
))
5800 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5801 if (ata_sg_setup_one(qc
))
5805 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5808 /* if device is sleeping, schedule softreset and abort the link */
5809 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5810 link
->eh_info
.action
|= ATA_EH_SOFTRESET
;
5811 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5812 ata_link_abort(link
);
5816 ap
->ops
->qc_prep(qc
);
5818 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5819 if (unlikely(qc
->err_mask
))
5824 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5825 qc
->err_mask
|= AC_ERR_SYSTEM
;
5827 ata_qc_complete(qc
);
5831 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5832 * @qc: command to issue to device
5834 * Using various libata functions and hooks, this function
5835 * starts an ATA command. ATA commands are grouped into
5836 * classes called "protocols", and issuing each type of protocol
5837 * is slightly different.
5839 * May be used as the qc_issue() entry in ata_port_operations.
5842 * spin_lock_irqsave(host lock)
5845 * Zero on success, AC_ERR_* mask on failure
5848 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5850 struct ata_port
*ap
= qc
->ap
;
5852 /* Use polling pio if the LLD doesn't handle
5853 * interrupt driven pio and atapi CDB interrupt.
5855 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5856 switch (qc
->tf
.protocol
) {
5858 case ATA_PROT_NODATA
:
5859 case ATA_PROT_ATAPI
:
5860 case ATA_PROT_ATAPI_NODATA
:
5861 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5863 case ATA_PROT_ATAPI_DMA
:
5864 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5865 /* see ata_dma_blacklisted() */
5873 /* select the device */
5874 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5876 /* start the command */
5877 switch (qc
->tf
.protocol
) {
5878 case ATA_PROT_NODATA
:
5879 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5880 ata_qc_set_polling(qc
);
5882 ata_tf_to_host(ap
, &qc
->tf
);
5883 ap
->hsm_task_state
= HSM_ST_LAST
;
5885 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5886 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5891 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5893 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5894 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5895 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5896 ap
->hsm_task_state
= HSM_ST_LAST
;
5900 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5901 ata_qc_set_polling(qc
);
5903 ata_tf_to_host(ap
, &qc
->tf
);
5905 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5906 /* PIO data out protocol */
5907 ap
->hsm_task_state
= HSM_ST_FIRST
;
5908 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5910 /* always send first data block using
5911 * the ata_pio_task() codepath.
5914 /* PIO data in protocol */
5915 ap
->hsm_task_state
= HSM_ST
;
5917 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5918 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5920 /* if polling, ata_pio_task() handles the rest.
5921 * otherwise, interrupt handler takes over from here.
5927 case ATA_PROT_ATAPI
:
5928 case ATA_PROT_ATAPI_NODATA
:
5929 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5930 ata_qc_set_polling(qc
);
5932 ata_tf_to_host(ap
, &qc
->tf
);
5934 ap
->hsm_task_state
= HSM_ST_FIRST
;
5936 /* send cdb by polling if no cdb interrupt */
5937 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5938 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5939 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5942 case ATA_PROT_ATAPI_DMA
:
5943 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5945 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5946 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5947 ap
->hsm_task_state
= HSM_ST_FIRST
;
5949 /* send cdb by polling if no cdb interrupt */
5950 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5951 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5956 return AC_ERR_SYSTEM
;
5963 * ata_host_intr - Handle host interrupt for given (port, task)
5964 * @ap: Port on which interrupt arrived (possibly...)
5965 * @qc: Taskfile currently active in engine
5967 * Handle host interrupt for given queued command. Currently,
5968 * only DMA interrupts are handled. All other commands are
5969 * handled via polling with interrupts disabled (nIEN bit).
5972 * spin_lock_irqsave(host lock)
5975 * One if interrupt was handled, zero if not (shared irq).
5978 inline unsigned int ata_host_intr(struct ata_port
*ap
,
5979 struct ata_queued_cmd
*qc
)
5981 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5982 u8 status
, host_stat
= 0;
5984 VPRINTK("ata%u: protocol %d task_state %d\n",
5985 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5987 /* Check whether we are expecting interrupt in this state */
5988 switch (ap
->hsm_task_state
) {
5990 /* Some pre-ATAPI-4 devices assert INTRQ
5991 * at this state when ready to receive CDB.
5994 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5995 * The flag was turned on only for atapi devices.
5996 * No need to check is_atapi_taskfile(&qc->tf) again.
5998 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6002 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6003 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
6004 /* check status of DMA engine */
6005 host_stat
= ap
->ops
->bmdma_status(ap
);
6006 VPRINTK("ata%u: host_stat 0x%X\n",
6007 ap
->print_id
, host_stat
);
6009 /* if it's not our irq... */
6010 if (!(host_stat
& ATA_DMA_INTR
))
6013 /* before we do anything else, clear DMA-Start bit */
6014 ap
->ops
->bmdma_stop(qc
);
6016 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6017 /* error when transfering data to/from memory */
6018 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6019 ap
->hsm_task_state
= HSM_ST_ERR
;
6029 /* check altstatus */
6030 status
= ata_altstatus(ap
);
6031 if (status
& ATA_BUSY
)
6034 /* check main status, clearing INTRQ */
6035 status
= ata_chk_status(ap
);
6036 if (unlikely(status
& ATA_BUSY
))
6039 /* ack bmdma irq events */
6040 ap
->ops
->irq_clear(ap
);
6042 ata_hsm_move(ap
, qc
, status
, 0);
6044 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6045 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
6046 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6048 return 1; /* irq handled */
6051 ap
->stats
.idle_irq
++;
6054 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6056 ap
->ops
->irq_clear(ap
);
6057 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6061 return 0; /* irq not handled */
6065 * ata_interrupt - Default ATA host interrupt handler
6066 * @irq: irq line (unused)
6067 * @dev_instance: pointer to our ata_host information structure
6069 * Default interrupt handler for PCI IDE devices. Calls
6070 * ata_host_intr() for each port that is not disabled.
6073 * Obtains host lock during operation.
6076 * IRQ_NONE or IRQ_HANDLED.
6079 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6081 struct ata_host
*host
= dev_instance
;
6083 unsigned int handled
= 0;
6084 unsigned long flags
;
6086 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6087 spin_lock_irqsave(&host
->lock
, flags
);
6089 for (i
= 0; i
< host
->n_ports
; i
++) {
6090 struct ata_port
*ap
;
6092 ap
= host
->ports
[i
];
6094 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6095 struct ata_queued_cmd
*qc
;
6097 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6098 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6099 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6100 handled
|= ata_host_intr(ap
, qc
);
6104 spin_unlock_irqrestore(&host
->lock
, flags
);
6106 return IRQ_RETVAL(handled
);
6110 * sata_scr_valid - test whether SCRs are accessible
6111 * @link: ATA link to test SCR accessibility for
6113 * Test whether SCRs are accessible for @link.
6119 * 1 if SCRs are accessible, 0 otherwise.
6121 int sata_scr_valid(struct ata_link
*link
)
6123 struct ata_port
*ap
= link
->ap
;
6125 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6129 * sata_scr_read - read SCR register of the specified port
6130 * @link: ATA link to read SCR for
6132 * @val: Place to store read value
6134 * Read SCR register @reg of @link into *@val. This function is
6135 * guaranteed to succeed if @link is ap->link, the cable type of
6136 * the port is SATA and the port implements ->scr_read.
6139 * None if @link is ap->link. Kernel thread context otherwise.
6142 * 0 on success, negative errno on failure.
6144 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6146 if (ata_is_host_link(link
)) {
6147 struct ata_port
*ap
= link
->ap
;
6149 if (sata_scr_valid(link
))
6150 return ap
->ops
->scr_read(ap
, reg
, val
);
6154 return sata_pmp_scr_read(link
, reg
, val
);
6158 * sata_scr_write - write SCR register of the specified port
6159 * @link: ATA link to write SCR for
6160 * @reg: SCR to write
6161 * @val: value to write
6163 * Write @val to SCR register @reg of @link. This function is
6164 * guaranteed to succeed if @link is ap->link, the cable type of
6165 * the port is SATA and the port implements ->scr_read.
6168 * None if @link is ap->link. Kernel thread context otherwise.
6171 * 0 on success, negative errno on failure.
6173 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6175 if (ata_is_host_link(link
)) {
6176 struct ata_port
*ap
= link
->ap
;
6178 if (sata_scr_valid(link
))
6179 return ap
->ops
->scr_write(ap
, reg
, val
);
6183 return sata_pmp_scr_write(link
, reg
, val
);
6187 * sata_scr_write_flush - write SCR register of the specified port and flush
6188 * @link: ATA link to write SCR for
6189 * @reg: SCR to write
6190 * @val: value to write
6192 * This function is identical to sata_scr_write() except that this
6193 * function performs flush after writing to the register.
6196 * None if @link is ap->link. Kernel thread context otherwise.
6199 * 0 on success, negative errno on failure.
6201 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6203 if (ata_is_host_link(link
)) {
6204 struct ata_port
*ap
= link
->ap
;
6207 if (sata_scr_valid(link
)) {
6208 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6210 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6216 return sata_pmp_scr_write(link
, reg
, val
);
6220 * ata_link_online - test whether the given link is online
6221 * @link: ATA link to test
6223 * Test whether @link is online. Note that this function returns
6224 * 0 if online status of @link cannot be obtained, so
6225 * ata_link_online(link) != !ata_link_offline(link).
6231 * 1 if the port online status is available and online.
6233 int ata_link_online(struct ata_link
*link
)
6237 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6238 (sstatus
& 0xf) == 0x3)
6244 * ata_link_offline - test whether the given link is offline
6245 * @link: ATA link to test
6247 * Test whether @link is offline. Note that this function
6248 * returns 0 if offline status of @link cannot be obtained, so
6249 * ata_link_online(link) != !ata_link_offline(link).
6255 * 1 if the port offline status is available and offline.
6257 int ata_link_offline(struct ata_link
*link
)
6261 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6262 (sstatus
& 0xf) != 0x3)
6267 int ata_flush_cache(struct ata_device
*dev
)
6269 unsigned int err_mask
;
6272 if (!ata_try_flush_cache(dev
))
6275 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6276 cmd
= ATA_CMD_FLUSH_EXT
;
6278 cmd
= ATA_CMD_FLUSH
;
6280 /* This is wrong. On a failed flush we get back the LBA of the lost
6281 sector and we should (assuming it wasn't aborted as unknown) issue
6282 a further flush command to continue the writeback until it
6284 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6286 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6294 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6295 unsigned int action
, unsigned int ehi_flags
,
6298 unsigned long flags
;
6301 for (i
= 0; i
< host
->n_ports
; i
++) {
6302 struct ata_port
*ap
= host
->ports
[i
];
6303 struct ata_link
*link
;
6305 /* Previous resume operation might still be in
6306 * progress. Wait for PM_PENDING to clear.
6308 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6309 ata_port_wait_eh(ap
);
6310 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6313 /* request PM ops to EH */
6314 spin_lock_irqsave(ap
->lock
, flags
);
6319 ap
->pm_result
= &rc
;
6322 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6323 __ata_port_for_each_link(link
, ap
) {
6324 link
->eh_info
.action
|= action
;
6325 link
->eh_info
.flags
|= ehi_flags
;
6328 ata_port_schedule_eh(ap
);
6330 spin_unlock_irqrestore(ap
->lock
, flags
);
6332 /* wait and check result */
6334 ata_port_wait_eh(ap
);
6335 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6345 * ata_host_suspend - suspend host
6346 * @host: host to suspend
6349 * Suspend @host. Actual operation is performed by EH. This
6350 * function requests EH to perform PM operations and waits for EH
6354 * Kernel thread context (may sleep).
6357 * 0 on success, -errno on failure.
6359 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6363 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6365 host
->dev
->power
.power_state
= mesg
;
6370 * ata_host_resume - resume host
6371 * @host: host to resume
6373 * Resume @host. Actual operation is performed by EH. This
6374 * function requests EH to perform PM operations and returns.
6375 * Note that all resume operations are performed parallely.
6378 * Kernel thread context (may sleep).
6380 void ata_host_resume(struct ata_host
*host
)
6382 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6383 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6384 host
->dev
->power
.power_state
= PMSG_ON
;
6389 * ata_port_start - Set port up for dma.
6390 * @ap: Port to initialize
6392 * Called just after data structures for each port are
6393 * initialized. Allocates space for PRD table.
6395 * May be used as the port_start() entry in ata_port_operations.
6398 * Inherited from caller.
6400 int ata_port_start(struct ata_port
*ap
)
6402 struct device
*dev
= ap
->dev
;
6405 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6410 rc
= ata_pad_alloc(ap
, dev
);
6414 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6415 (unsigned long long)ap
->prd_dma
);
6420 * ata_dev_init - Initialize an ata_device structure
6421 * @dev: Device structure to initialize
6423 * Initialize @dev in preparation for probing.
6426 * Inherited from caller.
6428 void ata_dev_init(struct ata_device
*dev
)
6430 struct ata_link
*link
= dev
->link
;
6431 struct ata_port
*ap
= link
->ap
;
6432 unsigned long flags
;
6434 /* SATA spd limit is bound to the first device */
6435 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6438 /* High bits of dev->flags are used to record warm plug
6439 * requests which occur asynchronously. Synchronize using
6442 spin_lock_irqsave(ap
->lock
, flags
);
6443 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6445 spin_unlock_irqrestore(ap
->lock
, flags
);
6447 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6448 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6449 dev
->pio_mask
= UINT_MAX
;
6450 dev
->mwdma_mask
= UINT_MAX
;
6451 dev
->udma_mask
= UINT_MAX
;
6455 * ata_link_init - Initialize an ata_link structure
6456 * @ap: ATA port link is attached to
6457 * @link: Link structure to initialize
6458 * @pmp: Port multiplier port number
6463 * Kernel thread context (may sleep)
6465 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6469 /* clear everything except for devices */
6470 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6474 link
->active_tag
= ATA_TAG_POISON
;
6475 link
->hw_sata_spd_limit
= UINT_MAX
;
6477 /* can't use iterator, ap isn't initialized yet */
6478 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6479 struct ata_device
*dev
= &link
->device
[i
];
6482 dev
->devno
= dev
- link
->device
;
6488 * sata_link_init_spd - Initialize link->sata_spd_limit
6489 * @link: Link to configure sata_spd_limit for
6491 * Initialize @link->[hw_]sata_spd_limit to the currently
6495 * Kernel thread context (may sleep).
6498 * 0 on success, -errno on failure.
6500 int sata_link_init_spd(struct ata_link
*link
)
6505 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6509 spd
= (scontrol
>> 4) & 0xf;
6511 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6513 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6519 * ata_port_alloc - allocate and initialize basic ATA port resources
6520 * @host: ATA host this allocated port belongs to
6522 * Allocate and initialize basic ATA port resources.
6525 * Allocate ATA port on success, NULL on failure.
6528 * Inherited from calling layer (may sleep).
6530 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6532 struct ata_port
*ap
;
6536 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6540 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6541 ap
->lock
= &host
->lock
;
6542 ap
->flags
= ATA_FLAG_DISABLED
;
6544 ap
->ctl
= ATA_DEVCTL_OBS
;
6546 ap
->dev
= host
->dev
;
6547 ap
->last_ctl
= 0xFF;
6549 #if defined(ATA_VERBOSE_DEBUG)
6550 /* turn on all debugging levels */
6551 ap
->msg_enable
= 0x00FF;
6552 #elif defined(ATA_DEBUG)
6553 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6555 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6558 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6559 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6560 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6561 INIT_LIST_HEAD(&ap
->eh_done_q
);
6562 init_waitqueue_head(&ap
->eh_wait_q
);
6563 init_timer_deferrable(&ap
->fastdrain_timer
);
6564 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6565 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6567 ap
->cbl
= ATA_CBL_NONE
;
6569 ata_link_init(ap
, &ap
->link
, 0);
6572 ap
->stats
.unhandled_irq
= 1;
6573 ap
->stats
.idle_irq
= 1;
6578 static void ata_host_release(struct device
*gendev
, void *res
)
6580 struct ata_host
*host
= dev_get_drvdata(gendev
);
6583 for (i
= 0; i
< host
->n_ports
; i
++) {
6584 struct ata_port
*ap
= host
->ports
[i
];
6589 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6590 ap
->ops
->port_stop(ap
);
6593 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6594 host
->ops
->host_stop(host
);
6596 for (i
= 0; i
< host
->n_ports
; i
++) {
6597 struct ata_port
*ap
= host
->ports
[i
];
6603 scsi_host_put(ap
->scsi_host
);
6605 kfree(ap
->pmp_link
);
6607 host
->ports
[i
] = NULL
;
6610 dev_set_drvdata(gendev
, NULL
);
6614 * ata_host_alloc - allocate and init basic ATA host resources
6615 * @dev: generic device this host is associated with
6616 * @max_ports: maximum number of ATA ports associated with this host
6618 * Allocate and initialize basic ATA host resources. LLD calls
6619 * this function to allocate a host, initializes it fully and
6620 * attaches it using ata_host_register().
6622 * @max_ports ports are allocated and host->n_ports is
6623 * initialized to @max_ports. The caller is allowed to decrease
6624 * host->n_ports before calling ata_host_register(). The unused
6625 * ports will be automatically freed on registration.
6628 * Allocate ATA host on success, NULL on failure.
6631 * Inherited from calling layer (may sleep).
6633 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6635 struct ata_host
*host
;
6641 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6644 /* alloc a container for our list of ATA ports (buses) */
6645 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6646 /* alloc a container for our list of ATA ports (buses) */
6647 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6651 devres_add(dev
, host
);
6652 dev_set_drvdata(dev
, host
);
6654 spin_lock_init(&host
->lock
);
6656 host
->n_ports
= max_ports
;
6658 /* allocate ports bound to this host */
6659 for (i
= 0; i
< max_ports
; i
++) {
6660 struct ata_port
*ap
;
6662 ap
= ata_port_alloc(host
);
6667 host
->ports
[i
] = ap
;
6670 devres_remove_group(dev
, NULL
);
6674 devres_release_group(dev
, NULL
);
6679 * ata_host_alloc_pinfo - alloc host and init with port_info array
6680 * @dev: generic device this host is associated with
6681 * @ppi: array of ATA port_info to initialize host with
6682 * @n_ports: number of ATA ports attached to this host
6684 * Allocate ATA host and initialize with info from @ppi. If NULL
6685 * terminated, @ppi may contain fewer entries than @n_ports. The
6686 * last entry will be used for the remaining ports.
6689 * Allocate ATA host on success, NULL on failure.
6692 * Inherited from calling layer (may sleep).
6694 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6695 const struct ata_port_info
* const * ppi
,
6698 const struct ata_port_info
*pi
;
6699 struct ata_host
*host
;
6702 host
= ata_host_alloc(dev
, n_ports
);
6706 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6707 struct ata_port
*ap
= host
->ports
[i
];
6712 ap
->pio_mask
= pi
->pio_mask
;
6713 ap
->mwdma_mask
= pi
->mwdma_mask
;
6714 ap
->udma_mask
= pi
->udma_mask
;
6715 ap
->flags
|= pi
->flags
;
6716 ap
->link
.flags
|= pi
->link_flags
;
6717 ap
->ops
= pi
->port_ops
;
6719 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6720 host
->ops
= pi
->port_ops
;
6721 if (!host
->private_data
&& pi
->private_data
)
6722 host
->private_data
= pi
->private_data
;
6729 * ata_host_start - start and freeze ports of an ATA host
6730 * @host: ATA host to start ports for
6732 * Start and then freeze ports of @host. Started status is
6733 * recorded in host->flags, so this function can be called
6734 * multiple times. Ports are guaranteed to get started only
6735 * once. If host->ops isn't initialized yet, its set to the
6736 * first non-dummy port ops.
6739 * Inherited from calling layer (may sleep).
6742 * 0 if all ports are started successfully, -errno otherwise.
6744 int ata_host_start(struct ata_host
*host
)
6748 if (host
->flags
& ATA_HOST_STARTED
)
6751 for (i
= 0; i
< host
->n_ports
; i
++) {
6752 struct ata_port
*ap
= host
->ports
[i
];
6754 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6755 host
->ops
= ap
->ops
;
6757 if (ap
->ops
->port_start
) {
6758 rc
= ap
->ops
->port_start(ap
);
6760 ata_port_printk(ap
, KERN_ERR
, "failed to "
6761 "start port (errno=%d)\n", rc
);
6766 ata_eh_freeze_port(ap
);
6769 host
->flags
|= ATA_HOST_STARTED
;
6774 struct ata_port
*ap
= host
->ports
[i
];
6776 if (ap
->ops
->port_stop
)
6777 ap
->ops
->port_stop(ap
);
6783 * ata_sas_host_init - Initialize a host struct
6784 * @host: host to initialize
6785 * @dev: device host is attached to
6786 * @flags: host flags
6790 * PCI/etc. bus probe sem.
6793 /* KILLME - the only user left is ipr */
6794 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6795 unsigned long flags
, const struct ata_port_operations
*ops
)
6797 spin_lock_init(&host
->lock
);
6799 host
->flags
= flags
;
6804 * ata_host_register - register initialized ATA host
6805 * @host: ATA host to register
6806 * @sht: template for SCSI host
6808 * Register initialized ATA host. @host is allocated using
6809 * ata_host_alloc() and fully initialized by LLD. This function
6810 * starts ports, registers @host with ATA and SCSI layers and
6811 * probe registered devices.
6814 * Inherited from calling layer (may sleep).
6817 * 0 on success, -errno otherwise.
6819 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6823 /* host must have been started */
6824 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6825 dev_printk(KERN_ERR
, host
->dev
,
6826 "BUG: trying to register unstarted host\n");
6831 /* Blow away unused ports. This happens when LLD can't
6832 * determine the exact number of ports to allocate at
6835 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6836 kfree(host
->ports
[i
]);
6838 /* give ports names and add SCSI hosts */
6839 for (i
= 0; i
< host
->n_ports
; i
++)
6840 host
->ports
[i
]->print_id
= ata_print_id
++;
6842 rc
= ata_scsi_add_hosts(host
, sht
);
6846 /* associate with ACPI nodes */
6847 ata_acpi_associate(host
);
6849 /* set cable, sata_spd_limit and report */
6850 for (i
= 0; i
< host
->n_ports
; i
++) {
6851 struct ata_port
*ap
= host
->ports
[i
];
6852 unsigned long xfer_mask
;
6854 /* set SATA cable type if still unset */
6855 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6856 ap
->cbl
= ATA_CBL_SATA
;
6858 /* init sata_spd_limit to the current value */
6859 sata_link_init_spd(&ap
->link
);
6861 /* print per-port info to dmesg */
6862 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6865 if (!ata_port_is_dummy(ap
)) {
6866 ata_port_printk(ap
, KERN_INFO
,
6867 "%cATA max %s %s\n",
6868 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6869 ata_mode_string(xfer_mask
),
6870 ap
->link
.eh_info
.desc
);
6871 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6873 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6876 /* perform each probe synchronously */
6877 DPRINTK("probe begin\n");
6878 for (i
= 0; i
< host
->n_ports
; i
++) {
6879 struct ata_port
*ap
= host
->ports
[i
];
6883 if (ap
->ops
->error_handler
) {
6884 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6885 unsigned long flags
;
6889 /* kick EH for boot probing */
6890 spin_lock_irqsave(ap
->lock
, flags
);
6893 (1 << ata_link_max_devices(&ap
->link
)) - 1;
6894 ehi
->action
|= ATA_EH_SOFTRESET
;
6895 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6897 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6898 ap
->pflags
|= ATA_PFLAG_LOADING
;
6899 ata_port_schedule_eh(ap
);
6901 spin_unlock_irqrestore(ap
->lock
, flags
);
6903 /* wait for EH to finish */
6904 ata_port_wait_eh(ap
);
6906 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6907 rc
= ata_bus_probe(ap
);
6908 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6911 /* FIXME: do something useful here?
6912 * Current libata behavior will
6913 * tear down everything when
6914 * the module is removed
6915 * or the h/w is unplugged.
6921 /* probes are done, now scan each port's disk(s) */
6922 DPRINTK("host probe begin\n");
6923 for (i
= 0; i
< host
->n_ports
; i
++) {
6924 struct ata_port
*ap
= host
->ports
[i
];
6926 ata_scsi_scan_host(ap
, 1);
6933 * ata_host_activate - start host, request IRQ and register it
6934 * @host: target ATA host
6935 * @irq: IRQ to request
6936 * @irq_handler: irq_handler used when requesting IRQ
6937 * @irq_flags: irq_flags used when requesting IRQ
6938 * @sht: scsi_host_template to use when registering the host
6940 * After allocating an ATA host and initializing it, most libata
6941 * LLDs perform three steps to activate the host - start host,
6942 * request IRQ and register it. This helper takes necessasry
6943 * arguments and performs the three steps in one go.
6946 * Inherited from calling layer (may sleep).
6949 * 0 on success, -errno otherwise.
6951 int ata_host_activate(struct ata_host
*host
, int irq
,
6952 irq_handler_t irq_handler
, unsigned long irq_flags
,
6953 struct scsi_host_template
*sht
)
6957 rc
= ata_host_start(host
);
6961 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6962 dev_driver_string(host
->dev
), host
);
6966 for (i
= 0; i
< host
->n_ports
; i
++)
6967 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6969 rc
= ata_host_register(host
, sht
);
6970 /* if failed, just free the IRQ and leave ports alone */
6972 devm_free_irq(host
->dev
, irq
, host
);
6978 * ata_port_detach - Detach ATA port in prepration of device removal
6979 * @ap: ATA port to be detached
6981 * Detach all ATA devices and the associated SCSI devices of @ap;
6982 * then, remove the associated SCSI host. @ap is guaranteed to
6983 * be quiescent on return from this function.
6986 * Kernel thread context (may sleep).
6988 static void ata_port_detach(struct ata_port
*ap
)
6990 unsigned long flags
;
6991 struct ata_link
*link
;
6992 struct ata_device
*dev
;
6994 if (!ap
->ops
->error_handler
)
6997 /* tell EH we're leaving & flush EH */
6998 spin_lock_irqsave(ap
->lock
, flags
);
6999 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7000 spin_unlock_irqrestore(ap
->lock
, flags
);
7002 ata_port_wait_eh(ap
);
7004 /* EH is now guaranteed to see UNLOADING, so no new device
7005 * will be attached. Disable all existing devices.
7007 spin_lock_irqsave(ap
->lock
, flags
);
7009 ata_port_for_each_link(link
, ap
) {
7010 ata_link_for_each_dev(dev
, link
)
7011 ata_dev_disable(dev
);
7014 spin_unlock_irqrestore(ap
->lock
, flags
);
7016 /* Final freeze & EH. All in-flight commands are aborted. EH
7017 * will be skipped and retrials will be terminated with bad
7020 spin_lock_irqsave(ap
->lock
, flags
);
7021 ata_port_freeze(ap
); /* won't be thawed */
7022 spin_unlock_irqrestore(ap
->lock
, flags
);
7024 ata_port_wait_eh(ap
);
7025 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7028 /* remove the associated SCSI host */
7029 scsi_remove_host(ap
->scsi_host
);
7033 * ata_host_detach - Detach all ports of an ATA host
7034 * @host: Host to detach
7036 * Detach all ports of @host.
7039 * Kernel thread context (may sleep).
7041 void ata_host_detach(struct ata_host
*host
)
7045 for (i
= 0; i
< host
->n_ports
; i
++)
7046 ata_port_detach(host
->ports
[i
]);
7050 * ata_std_ports - initialize ioaddr with standard port offsets.
7051 * @ioaddr: IO address structure to be initialized
7053 * Utility function which initializes data_addr, error_addr,
7054 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7055 * device_addr, status_addr, and command_addr to standard offsets
7056 * relative to cmd_addr.
7058 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7061 void ata_std_ports(struct ata_ioports
*ioaddr
)
7063 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7064 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7065 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7066 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7067 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7068 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7069 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7070 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7071 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7072 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7079 * ata_pci_remove_one - PCI layer callback for device removal
7080 * @pdev: PCI device that was removed
7082 * PCI layer indicates to libata via this hook that hot-unplug or
7083 * module unload event has occurred. Detach all ports. Resource
7084 * release is handled via devres.
7087 * Inherited from PCI layer (may sleep).
7089 void ata_pci_remove_one(struct pci_dev
*pdev
)
7091 struct device
*dev
= &pdev
->dev
;
7092 struct ata_host
*host
= dev_get_drvdata(dev
);
7094 ata_host_detach(host
);
7097 /* move to PCI subsystem */
7098 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7100 unsigned long tmp
= 0;
7102 switch (bits
->width
) {
7105 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7111 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7117 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7128 return (tmp
== bits
->val
) ? 1 : 0;
7132 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7134 pci_save_state(pdev
);
7135 pci_disable_device(pdev
);
7137 if (mesg
.event
== PM_EVENT_SUSPEND
)
7138 pci_set_power_state(pdev
, PCI_D3hot
);
7141 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7145 pci_set_power_state(pdev
, PCI_D0
);
7146 pci_restore_state(pdev
);
7148 rc
= pcim_enable_device(pdev
);
7150 dev_printk(KERN_ERR
, &pdev
->dev
,
7151 "failed to enable device after resume (%d)\n", rc
);
7155 pci_set_master(pdev
);
7159 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7161 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7164 rc
= ata_host_suspend(host
, mesg
);
7168 ata_pci_device_do_suspend(pdev
, mesg
);
7173 int ata_pci_device_resume(struct pci_dev
*pdev
)
7175 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7178 rc
= ata_pci_device_do_resume(pdev
);
7180 ata_host_resume(host
);
7183 #endif /* CONFIG_PM */
7185 #endif /* CONFIG_PCI */
7188 static int __init
ata_init(void)
7190 ata_probe_timeout
*= HZ
;
7191 ata_wq
= create_workqueue("ata");
7195 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7197 destroy_workqueue(ata_wq
);
7201 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7205 static void __exit
ata_exit(void)
7207 destroy_workqueue(ata_wq
);
7208 destroy_workqueue(ata_aux_wq
);
7211 subsys_initcall(ata_init
);
7212 module_exit(ata_exit
);
7214 static unsigned long ratelimit_time
;
7215 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7217 int ata_ratelimit(void)
7220 unsigned long flags
;
7222 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7224 if (time_after(jiffies
, ratelimit_time
)) {
7226 ratelimit_time
= jiffies
+ (HZ
/5);
7230 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7236 * ata_wait_register - wait until register value changes
7237 * @reg: IO-mapped register
7238 * @mask: Mask to apply to read register value
7239 * @val: Wait condition
7240 * @interval_msec: polling interval in milliseconds
7241 * @timeout_msec: timeout in milliseconds
7243 * Waiting for some bits of register to change is a common
7244 * operation for ATA controllers. This function reads 32bit LE
7245 * IO-mapped register @reg and tests for the following condition.
7247 * (*@reg & mask) != val
7249 * If the condition is met, it returns; otherwise, the process is
7250 * repeated after @interval_msec until timeout.
7253 * Kernel thread context (may sleep)
7256 * The final register value.
7258 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7259 unsigned long interval_msec
,
7260 unsigned long timeout_msec
)
7262 unsigned long timeout
;
7265 tmp
= ioread32(reg
);
7267 /* Calculate timeout _after_ the first read to make sure
7268 * preceding writes reach the controller before starting to
7269 * eat away the timeout.
7271 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7273 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7274 msleep(interval_msec
);
7275 tmp
= ioread32(reg
);
7284 static void ata_dummy_noret(struct ata_port
*ap
) { }
7285 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7286 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7288 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7293 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7295 return AC_ERR_SYSTEM
;
7298 const struct ata_port_operations ata_dummy_port_ops
= {
7299 .check_status
= ata_dummy_check_status
,
7300 .check_altstatus
= ata_dummy_check_status
,
7301 .dev_select
= ata_noop_dev_select
,
7302 .qc_prep
= ata_noop_qc_prep
,
7303 .qc_issue
= ata_dummy_qc_issue
,
7304 .freeze
= ata_dummy_noret
,
7305 .thaw
= ata_dummy_noret
,
7306 .error_handler
= ata_dummy_noret
,
7307 .post_internal_cmd
= ata_dummy_qc_noret
,
7308 .irq_clear
= ata_dummy_noret
,
7309 .port_start
= ata_dummy_ret0
,
7310 .port_stop
= ata_dummy_noret
,
7313 const struct ata_port_info ata_dummy_port_info
= {
7314 .port_ops
= &ata_dummy_port_ops
,
7318 * libata is essentially a library of internal helper functions for
7319 * low-level ATA host controller drivers. As such, the API/ABI is
7320 * likely to change as new drivers are added and updated.
7321 * Do not depend on ABI/API stability.
7324 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7325 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7326 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7327 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7328 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7329 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7330 EXPORT_SYMBOL_GPL(ata_std_ports
);
7331 EXPORT_SYMBOL_GPL(ata_host_init
);
7332 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7333 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7334 EXPORT_SYMBOL_GPL(ata_host_start
);
7335 EXPORT_SYMBOL_GPL(ata_host_register
);
7336 EXPORT_SYMBOL_GPL(ata_host_activate
);
7337 EXPORT_SYMBOL_GPL(ata_host_detach
);
7338 EXPORT_SYMBOL_GPL(ata_sg_init
);
7339 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7340 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7341 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7342 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7343 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7344 EXPORT_SYMBOL_GPL(ata_tf_load
);
7345 EXPORT_SYMBOL_GPL(ata_tf_read
);
7346 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7347 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7348 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7349 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7350 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7351 EXPORT_SYMBOL_GPL(ata_check_status
);
7352 EXPORT_SYMBOL_GPL(ata_altstatus
);
7353 EXPORT_SYMBOL_GPL(ata_exec_command
);
7354 EXPORT_SYMBOL_GPL(ata_port_start
);
7355 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7356 EXPORT_SYMBOL_GPL(ata_interrupt
);
7357 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7358 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7359 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7360 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7361 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7362 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7363 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7364 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7365 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7366 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7367 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7368 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7369 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7370 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7371 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7372 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7373 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7374 EXPORT_SYMBOL_GPL(ata_port_probe
);
7375 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7376 EXPORT_SYMBOL_GPL(sata_set_spd
);
7377 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7378 EXPORT_SYMBOL_GPL(sata_link_resume
);
7379 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7380 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7381 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7382 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7383 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7384 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7385 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7386 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7387 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7388 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7389 EXPORT_SYMBOL_GPL(ata_port_disable
);
7390 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7391 EXPORT_SYMBOL_GPL(ata_wait_register
);
7392 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7393 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7394 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7395 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7396 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7397 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7398 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7399 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7400 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7401 EXPORT_SYMBOL_GPL(ata_host_intr
);
7402 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7403 EXPORT_SYMBOL_GPL(sata_scr_read
);
7404 EXPORT_SYMBOL_GPL(sata_scr_write
);
7405 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7406 EXPORT_SYMBOL_GPL(ata_link_online
);
7407 EXPORT_SYMBOL_GPL(ata_link_offline
);
7409 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7410 EXPORT_SYMBOL_GPL(ata_host_resume
);
7411 #endif /* CONFIG_PM */
7412 EXPORT_SYMBOL_GPL(ata_id_string
);
7413 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7414 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7415 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7417 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7418 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7419 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7422 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7423 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7424 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7425 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7426 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7427 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7429 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7430 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7431 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7432 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7433 #endif /* CONFIG_PM */
7434 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7435 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7436 #endif /* CONFIG_PCI */
7438 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7439 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7440 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7441 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7442 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7444 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7445 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7446 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7447 EXPORT_SYMBOL_GPL(ata_port_desc
);
7449 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7450 #endif /* CONFIG_PCI */
7451 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7452 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7453 EXPORT_SYMBOL_GPL(ata_link_abort
);
7454 EXPORT_SYMBOL_GPL(ata_port_abort
);
7455 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7456 EXPORT_SYMBOL_GPL(sata_async_notification
);
7457 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7458 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7459 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7460 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7461 EXPORT_SYMBOL_GPL(ata_do_eh
);
7462 EXPORT_SYMBOL_GPL(ata_irq_on
);
7463 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7465 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7466 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7467 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7468 EXPORT_SYMBOL_GPL(ata_cable_sata
);