2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
52 #include <scsi/scsi.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_host.h>
55 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
62 #define DRV_VERSION "2.20" /* must be exactly four chars */
65 /* debounce timing parameters in msecs { interval, duration, timeout } */
66 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
67 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
68 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
70 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
71 u16 heads
, u16 sectors
);
72 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
75 unsigned int ata_print_id
= 1;
76 static struct workqueue_struct
*ata_wq
;
78 struct workqueue_struct
*ata_aux_wq
;
80 int atapi_enabled
= 1;
81 module_param(atapi_enabled
, int, 0444);
82 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
85 module_param(atapi_dmadir
, int, 0444);
86 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 module_param_named(fua
, libata_fua
, int, 0444);
90 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
92 static int ata_ignore_hpa
= 0;
93 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
94 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
96 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
97 module_param(ata_probe_timeout
, int, 0444);
98 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
100 int libata_noacpi
= 1;
101 module_param_named(noacpi
, libata_noacpi
, int, 0444);
102 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in suspend/resume when set");
104 MODULE_AUTHOR("Jeff Garzik");
105 MODULE_DESCRIPTION("Library module for ATA devices");
106 MODULE_LICENSE("GPL");
107 MODULE_VERSION(DRV_VERSION
);
111 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
112 * @tf: Taskfile to convert
113 * @fis: Buffer into which data will output
114 * @pmp: Port multiplier port
116 * Converts a standard ATA taskfile to a Serial ATA
117 * FIS structure (Register - Host to Device).
120 * Inherited from caller.
123 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
125 fis
[0] = 0x27; /* Register - Host to Device FIS */
126 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
127 bit 7 indicates Command FIS */
128 fis
[2] = tf
->command
;
129 fis
[3] = tf
->feature
;
136 fis
[8] = tf
->hob_lbal
;
137 fis
[9] = tf
->hob_lbam
;
138 fis
[10] = tf
->hob_lbah
;
139 fis
[11] = tf
->hob_feature
;
142 fis
[13] = tf
->hob_nsect
;
153 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
154 * @fis: Buffer from which data will be input
155 * @tf: Taskfile to output
157 * Converts a serial ATA FIS structure to a standard ATA taskfile.
160 * Inherited from caller.
163 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
165 tf
->command
= fis
[2]; /* status */
166 tf
->feature
= fis
[3]; /* error */
173 tf
->hob_lbal
= fis
[8];
174 tf
->hob_lbam
= fis
[9];
175 tf
->hob_lbah
= fis
[10];
178 tf
->hob_nsect
= fis
[13];
181 static const u8 ata_rw_cmds
[] = {
185 ATA_CMD_READ_MULTI_EXT
,
186 ATA_CMD_WRITE_MULTI_EXT
,
190 ATA_CMD_WRITE_MULTI_FUA_EXT
,
194 ATA_CMD_PIO_READ_EXT
,
195 ATA_CMD_PIO_WRITE_EXT
,
208 ATA_CMD_WRITE_FUA_EXT
212 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
213 * @tf: command to examine and configure
214 * @dev: device tf belongs to
216 * Examine the device configuration and tf->flags to calculate
217 * the proper read/write commands and protocol to use.
222 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
226 int index
, fua
, lba48
, write
;
228 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
229 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
230 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
232 if (dev
->flags
& ATA_DFLAG_PIO
) {
233 tf
->protocol
= ATA_PROT_PIO
;
234 index
= dev
->multi_count
? 0 : 8;
235 } else if (lba48
&& (dev
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
236 /* Unable to use DMA due to host limitation */
237 tf
->protocol
= ATA_PROT_PIO
;
238 index
= dev
->multi_count
? 0 : 8;
240 tf
->protocol
= ATA_PROT_DMA
;
244 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
253 * ata_tf_read_block - Read block address from ATA taskfile
254 * @tf: ATA taskfile of interest
255 * @dev: ATA device @tf belongs to
260 * Read block address from @tf. This function can handle all
261 * three address formats - LBA, LBA48 and CHS. tf->protocol and
262 * flags select the address format to use.
265 * Block address read from @tf.
267 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
271 if (tf
->flags
& ATA_TFLAG_LBA
) {
272 if (tf
->flags
& ATA_TFLAG_LBA48
) {
273 block
|= (u64
)tf
->hob_lbah
<< 40;
274 block
|= (u64
)tf
->hob_lbam
<< 32;
275 block
|= tf
->hob_lbal
<< 24;
277 block
|= (tf
->device
& 0xf) << 24;
279 block
|= tf
->lbah
<< 16;
280 block
|= tf
->lbam
<< 8;
285 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
286 head
= tf
->device
& 0xf;
289 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
296 * ata_build_rw_tf - Build ATA taskfile for given read/write request
297 * @tf: Target ATA taskfile
298 * @dev: ATA device @tf belongs to
299 * @block: Block address
300 * @n_block: Number of blocks
301 * @tf_flags: RW/FUA etc...
307 * Build ATA taskfile @tf for read/write request described by
308 * @block, @n_block, @tf_flags and @tag on @dev.
312 * 0 on success, -ERANGE if the request is too large for @dev,
313 * -EINVAL if the request is invalid.
315 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
316 u64 block
, u32 n_block
, unsigned int tf_flags
,
319 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
320 tf
->flags
|= tf_flags
;
322 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
324 if (!lba_48_ok(block
, n_block
))
327 tf
->protocol
= ATA_PROT_NCQ
;
328 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
330 if (tf
->flags
& ATA_TFLAG_WRITE
)
331 tf
->command
= ATA_CMD_FPDMA_WRITE
;
333 tf
->command
= ATA_CMD_FPDMA_READ
;
335 tf
->nsect
= tag
<< 3;
336 tf
->hob_feature
= (n_block
>> 8) & 0xff;
337 tf
->feature
= n_block
& 0xff;
339 tf
->hob_lbah
= (block
>> 40) & 0xff;
340 tf
->hob_lbam
= (block
>> 32) & 0xff;
341 tf
->hob_lbal
= (block
>> 24) & 0xff;
342 tf
->lbah
= (block
>> 16) & 0xff;
343 tf
->lbam
= (block
>> 8) & 0xff;
344 tf
->lbal
= block
& 0xff;
347 if (tf
->flags
& ATA_TFLAG_FUA
)
348 tf
->device
|= 1 << 7;
349 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
350 tf
->flags
|= ATA_TFLAG_LBA
;
352 if (lba_28_ok(block
, n_block
)) {
354 tf
->device
|= (block
>> 24) & 0xf;
355 } else if (lba_48_ok(block
, n_block
)) {
356 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
360 tf
->flags
|= ATA_TFLAG_LBA48
;
362 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
364 tf
->hob_lbah
= (block
>> 40) & 0xff;
365 tf
->hob_lbam
= (block
>> 32) & 0xff;
366 tf
->hob_lbal
= (block
>> 24) & 0xff;
368 /* request too large even for LBA48 */
371 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
374 tf
->nsect
= n_block
& 0xff;
376 tf
->lbah
= (block
>> 16) & 0xff;
377 tf
->lbam
= (block
>> 8) & 0xff;
378 tf
->lbal
= block
& 0xff;
380 tf
->device
|= ATA_LBA
;
383 u32 sect
, head
, cyl
, track
;
385 /* The request -may- be too large for CHS addressing. */
386 if (!lba_28_ok(block
, n_block
))
389 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
392 /* Convert LBA to CHS */
393 track
= (u32
)block
/ dev
->sectors
;
394 cyl
= track
/ dev
->heads
;
395 head
= track
% dev
->heads
;
396 sect
= (u32
)block
% dev
->sectors
+ 1;
398 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
399 (u32
)block
, track
, cyl
, head
, sect
);
401 /* Check whether the converted CHS can fit.
405 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
408 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
419 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
420 * @pio_mask: pio_mask
421 * @mwdma_mask: mwdma_mask
422 * @udma_mask: udma_mask
424 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
425 * unsigned int xfer_mask.
433 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
434 unsigned int mwdma_mask
,
435 unsigned int udma_mask
)
437 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
438 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
439 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
443 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
444 * @xfer_mask: xfer_mask to unpack
445 * @pio_mask: resulting pio_mask
446 * @mwdma_mask: resulting mwdma_mask
447 * @udma_mask: resulting udma_mask
449 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
450 * Any NULL distination masks will be ignored.
452 static void ata_unpack_xfermask(unsigned int xfer_mask
,
453 unsigned int *pio_mask
,
454 unsigned int *mwdma_mask
,
455 unsigned int *udma_mask
)
458 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
460 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
462 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
465 static const struct ata_xfer_ent
{
469 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
470 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
471 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
476 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
477 * @xfer_mask: xfer_mask of interest
479 * Return matching XFER_* value for @xfer_mask. Only the highest
480 * bit of @xfer_mask is considered.
486 * Matching XFER_* value, 0 if no match found.
488 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
490 int highbit
= fls(xfer_mask
) - 1;
491 const struct ata_xfer_ent
*ent
;
493 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
494 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
495 return ent
->base
+ highbit
- ent
->shift
;
500 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
501 * @xfer_mode: XFER_* of interest
503 * Return matching xfer_mask for @xfer_mode.
509 * Matching xfer_mask, 0 if no match found.
511 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
513 const struct ata_xfer_ent
*ent
;
515 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
516 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
517 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
522 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
523 * @xfer_mode: XFER_* of interest
525 * Return matching xfer_shift for @xfer_mode.
531 * Matching xfer_shift, -1 if no match found.
533 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
535 const struct ata_xfer_ent
*ent
;
537 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
538 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
544 * ata_mode_string - convert xfer_mask to string
545 * @xfer_mask: mask of bits supported; only highest bit counts.
547 * Determine string which represents the highest speed
548 * (highest bit in @modemask).
554 * Constant C string representing highest speed listed in
555 * @mode_mask, or the constant C string "<n/a>".
557 static const char *ata_mode_string(unsigned int xfer_mask
)
559 static const char * const xfer_mode_str
[] = {
583 highbit
= fls(xfer_mask
) - 1;
584 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
585 return xfer_mode_str
[highbit
];
589 static const char *sata_spd_string(unsigned int spd
)
591 static const char * const spd_str
[] = {
596 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
598 return spd_str
[spd
- 1];
601 void ata_dev_disable(struct ata_device
*dev
)
603 if (ata_dev_enabled(dev
) && ata_msg_drv(dev
->ap
)) {
604 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
605 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
612 * ata_devchk - PATA device presence detection
613 * @ap: ATA channel to examine
614 * @device: Device to examine (starting at zero)
616 * This technique was originally described in
617 * Hale Landis's ATADRVR (www.ata-atapi.com), and
618 * later found its way into the ATA/ATAPI spec.
620 * Write a pattern to the ATA shadow registers,
621 * and if a device is present, it will respond by
622 * correctly storing and echoing back the
623 * ATA shadow register contents.
629 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
631 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
634 ap
->ops
->dev_select(ap
, device
);
636 iowrite8(0x55, ioaddr
->nsect_addr
);
637 iowrite8(0xaa, ioaddr
->lbal_addr
);
639 iowrite8(0xaa, ioaddr
->nsect_addr
);
640 iowrite8(0x55, ioaddr
->lbal_addr
);
642 iowrite8(0x55, ioaddr
->nsect_addr
);
643 iowrite8(0xaa, ioaddr
->lbal_addr
);
645 nsect
= ioread8(ioaddr
->nsect_addr
);
646 lbal
= ioread8(ioaddr
->lbal_addr
);
648 if ((nsect
== 0x55) && (lbal
== 0xaa))
649 return 1; /* we found a device */
651 return 0; /* nothing found */
655 * ata_dev_classify - determine device type based on ATA-spec signature
656 * @tf: ATA taskfile register set for device to be identified
658 * Determine from taskfile register contents whether a device is
659 * ATA or ATAPI, as per "Signature and persistence" section
660 * of ATA/PI spec (volume 1, sect 5.14).
666 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
667 * the event of failure.
670 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
672 /* Apple's open source Darwin code hints that some devices only
673 * put a proper signature into the LBA mid/high registers,
674 * So, we only check those. It's sufficient for uniqueness.
677 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
678 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
679 DPRINTK("found ATA device by sig\n");
683 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
684 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
685 DPRINTK("found ATAPI device by sig\n");
686 return ATA_DEV_ATAPI
;
689 DPRINTK("unknown device\n");
690 return ATA_DEV_UNKNOWN
;
694 * ata_dev_try_classify - Parse returned ATA device signature
695 * @ap: ATA channel to examine
696 * @device: Device to examine (starting at zero)
697 * @r_err: Value of error register on completion
699 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
700 * an ATA/ATAPI-defined set of values is placed in the ATA
701 * shadow registers, indicating the results of device detection
704 * Select the ATA device, and read the values from the ATA shadow
705 * registers. Then parse according to the Error register value,
706 * and the spec-defined values examined by ata_dev_classify().
712 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
716 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
718 struct ata_taskfile tf
;
722 ap
->ops
->dev_select(ap
, device
);
724 memset(&tf
, 0, sizeof(tf
));
726 ap
->ops
->tf_read(ap
, &tf
);
731 /* see if device passed diags: if master then continue and warn later */
732 if (err
== 0 && device
== 0)
733 /* diagnostic fail : do nothing _YET_ */
734 ap
->device
[device
].horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
737 else if ((device
== 0) && (err
== 0x81))
742 /* determine if device is ATA or ATAPI */
743 class = ata_dev_classify(&tf
);
745 if (class == ATA_DEV_UNKNOWN
)
747 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
753 * ata_id_string - Convert IDENTIFY DEVICE page into string
754 * @id: IDENTIFY DEVICE results we will examine
755 * @s: string into which data is output
756 * @ofs: offset into identify device page
757 * @len: length of string to return. must be an even number.
759 * The strings in the IDENTIFY DEVICE page are broken up into
760 * 16-bit chunks. Run through the string, and output each
761 * 8-bit chunk linearly, regardless of platform.
767 void ata_id_string(const u16
*id
, unsigned char *s
,
768 unsigned int ofs
, unsigned int len
)
787 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
788 * @id: IDENTIFY DEVICE results we will examine
789 * @s: string into which data is output
790 * @ofs: offset into identify device page
791 * @len: length of string to return. must be an odd number.
793 * This function is identical to ata_id_string except that it
794 * trims trailing spaces and terminates the resulting string with
795 * null. @len must be actual maximum length (even number) + 1.
800 void ata_id_c_string(const u16
*id
, unsigned char *s
,
801 unsigned int ofs
, unsigned int len
)
807 ata_id_string(id
, s
, ofs
, len
- 1);
809 p
= s
+ strnlen(s
, len
- 1);
810 while (p
> s
&& p
[-1] == ' ')
815 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
819 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
820 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
821 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
822 sectors
|= (tf
->lbah
& 0xff) << 16;
823 sectors
|= (tf
->lbam
& 0xff) << 8;
824 sectors
|= (tf
->lbal
& 0xff);
829 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
833 sectors
|= (tf
->device
& 0x0f) << 24;
834 sectors
|= (tf
->lbah
& 0xff) << 16;
835 sectors
|= (tf
->lbam
& 0xff) << 8;
836 sectors
|= (tf
->lbal
& 0xff);
842 * ata_read_native_max_address_ext - LBA48 native max query
843 * @dev: Device to query
845 * Perform an LBA48 size query upon the device in question. Return the
846 * actual LBA48 size or zero if the command fails.
849 static u64
ata_read_native_max_address_ext(struct ata_device
*dev
)
852 struct ata_taskfile tf
;
854 ata_tf_init(dev
, &tf
);
856 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
857 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
858 tf
.protocol
|= ATA_PROT_NODATA
;
861 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
865 return ata_tf_to_lba48(&tf
);
869 * ata_read_native_max_address - LBA28 native max query
870 * @dev: Device to query
872 * Performa an LBA28 size query upon the device in question. Return the
873 * actual LBA28 size or zero if the command fails.
876 static u64
ata_read_native_max_address(struct ata_device
*dev
)
879 struct ata_taskfile tf
;
881 ata_tf_init(dev
, &tf
);
883 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
884 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
885 tf
.protocol
|= ATA_PROT_NODATA
;
888 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
892 return ata_tf_to_lba(&tf
);
896 * ata_set_native_max_address_ext - LBA48 native max set
897 * @dev: Device to query
899 * Perform an LBA48 size set max upon the device in question. Return the
900 * actual LBA48 size or zero if the command fails.
903 static u64
ata_set_native_max_address_ext(struct ata_device
*dev
, u64 new_sectors
)
906 struct ata_taskfile tf
;
910 ata_tf_init(dev
, &tf
);
912 tf
.command
= ATA_CMD_SET_MAX_EXT
;
913 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
914 tf
.protocol
|= ATA_PROT_NODATA
;
917 tf
.lbal
= (new_sectors
>> 0) & 0xff;
918 tf
.lbam
= (new_sectors
>> 8) & 0xff;
919 tf
.lbah
= (new_sectors
>> 16) & 0xff;
921 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
922 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
923 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
925 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
929 return ata_tf_to_lba48(&tf
);
933 * ata_set_native_max_address - LBA28 native max set
934 * @dev: Device to query
936 * Perform an LBA28 size set max upon the device in question. Return the
937 * actual LBA28 size or zero if the command fails.
940 static u64
ata_set_native_max_address(struct ata_device
*dev
, u64 new_sectors
)
943 struct ata_taskfile tf
;
947 ata_tf_init(dev
, &tf
);
949 tf
.command
= ATA_CMD_SET_MAX
;
950 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
951 tf
.protocol
|= ATA_PROT_NODATA
;
953 tf
.lbal
= (new_sectors
>> 0) & 0xff;
954 tf
.lbam
= (new_sectors
>> 8) & 0xff;
955 tf
.lbah
= (new_sectors
>> 16) & 0xff;
956 tf
.device
|= ((new_sectors
>> 24) & 0x0f) | 0x40;
958 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
962 return ata_tf_to_lba(&tf
);
966 * ata_hpa_resize - Resize a device with an HPA set
967 * @dev: Device to resize
969 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
970 * it if required to the full size of the media. The caller must check
971 * the drive has the HPA feature set enabled.
974 static u64
ata_hpa_resize(struct ata_device
*dev
)
976 u64 sectors
= dev
->n_sectors
;
979 if (ata_id_has_lba48(dev
->id
))
980 hpa_sectors
= ata_read_native_max_address_ext(dev
);
982 hpa_sectors
= ata_read_native_max_address(dev
);
984 /* if no hpa, both should be equal */
985 ata_dev_printk(dev
, KERN_INFO
, "%s 1: sectors = %lld, hpa_sectors = %lld\n",
986 __FUNCTION__
, sectors
, hpa_sectors
);
988 if (hpa_sectors
> sectors
) {
989 ata_dev_printk(dev
, KERN_INFO
,
990 "Host Protected Area detected:\n"
991 "\tcurrent size: %lld sectors\n"
992 "\tnative size: %lld sectors\n",
993 sectors
, hpa_sectors
);
995 if (ata_ignore_hpa
) {
996 if (ata_id_has_lba48(dev
->id
))
997 hpa_sectors
= ata_set_native_max_address_ext(dev
, hpa_sectors
);
999 hpa_sectors
= ata_set_native_max_address(dev
, hpa_sectors
);
1002 ata_dev_printk(dev
, KERN_INFO
,
1003 "native size increased to %lld sectors\n", hpa_sectors
);
1011 static u64
ata_id_n_sectors(const u16
*id
)
1013 if (ata_id_has_lba(id
)) {
1014 if (ata_id_has_lba48(id
))
1015 return ata_id_u64(id
, 100);
1017 return ata_id_u32(id
, 60);
1019 if (ata_id_current_chs_valid(id
))
1020 return ata_id_u32(id
, 57);
1022 return id
[1] * id
[3] * id
[6];
1027 * ata_id_to_dma_mode - Identify DMA mode from id block
1028 * @dev: device to identify
1029 * @unknown: mode to assume if we cannot tell
1031 * Set up the timing values for the device based upon the identify
1032 * reported values for the DMA mode. This function is used by drivers
1033 * which rely upon firmware configured modes, but wish to report the
1034 * mode correctly when possible.
1036 * In addition we emit similarly formatted messages to the default
1037 * ata_dev_set_mode handler, in order to provide consistency of
1041 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1046 /* Pack the DMA modes */
1047 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1048 if (dev
->id
[53] & 0x04)
1049 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1051 /* Select the mode in use */
1052 mode
= ata_xfer_mask2mode(mask
);
1055 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1056 ata_mode_string(mask
));
1058 /* SWDMA perhaps ? */
1060 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1063 /* Configure the device reporting */
1064 dev
->xfer_mode
= mode
;
1065 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1069 * ata_noop_dev_select - Select device 0/1 on ATA bus
1070 * @ap: ATA channel to manipulate
1071 * @device: ATA device (numbered from zero) to select
1073 * This function performs no actual function.
1075 * May be used as the dev_select() entry in ata_port_operations.
1080 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1086 * ata_std_dev_select - Select device 0/1 on ATA bus
1087 * @ap: ATA channel to manipulate
1088 * @device: ATA device (numbered from zero) to select
1090 * Use the method defined in the ATA specification to
1091 * make either device 0, or device 1, active on the
1092 * ATA channel. Works with both PIO and MMIO.
1094 * May be used as the dev_select() entry in ata_port_operations.
1100 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1105 tmp
= ATA_DEVICE_OBS
;
1107 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1109 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1110 ata_pause(ap
); /* needed; also flushes, for mmio */
1114 * ata_dev_select - Select device 0/1 on ATA bus
1115 * @ap: ATA channel to manipulate
1116 * @device: ATA device (numbered from zero) to select
1117 * @wait: non-zero to wait for Status register BSY bit to clear
1118 * @can_sleep: non-zero if context allows sleeping
1120 * Use the method defined in the ATA specification to
1121 * make either device 0, or device 1, active on the
1124 * This is a high-level version of ata_std_dev_select(),
1125 * which additionally provides the services of inserting
1126 * the proper pauses and status polling, where needed.
1132 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1133 unsigned int wait
, unsigned int can_sleep
)
1135 if (ata_msg_probe(ap
))
1136 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1137 "device %u, wait %u\n", device
, wait
);
1142 ap
->ops
->dev_select(ap
, device
);
1145 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1152 * ata_dump_id - IDENTIFY DEVICE info debugging output
1153 * @id: IDENTIFY DEVICE page to dump
1155 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1162 static inline void ata_dump_id(const u16
*id
)
1164 DPRINTK("49==0x%04x "
1174 DPRINTK("80==0x%04x "
1184 DPRINTK("88==0x%04x "
1191 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1192 * @id: IDENTIFY data to compute xfer mask from
1194 * Compute the xfermask for this device. This is not as trivial
1195 * as it seems if we must consider early devices correctly.
1197 * FIXME: pre IDE drive timing (do we care ?).
1205 static unsigned int ata_id_xfermask(const u16
*id
)
1207 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1209 /* Usual case. Word 53 indicates word 64 is valid */
1210 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1211 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1215 /* If word 64 isn't valid then Word 51 high byte holds
1216 * the PIO timing number for the maximum. Turn it into
1219 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1220 if (mode
< 5) /* Valid PIO range */
1221 pio_mask
= (2 << mode
) - 1;
1225 /* But wait.. there's more. Design your standards by
1226 * committee and you too can get a free iordy field to
1227 * process. However its the speeds not the modes that
1228 * are supported... Note drivers using the timing API
1229 * will get this right anyway
1233 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1235 if (ata_id_is_cfa(id
)) {
1237 * Process compact flash extended modes
1239 int pio
= id
[163] & 0x7;
1240 int dma
= (id
[163] >> 3) & 7;
1243 pio_mask
|= (1 << 5);
1245 pio_mask
|= (1 << 6);
1247 mwdma_mask
|= (1 << 3);
1249 mwdma_mask
|= (1 << 4);
1253 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1254 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1256 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1260 * ata_port_queue_task - Queue port_task
1261 * @ap: The ata_port to queue port_task for
1262 * @fn: workqueue function to be scheduled
1263 * @data: data for @fn to use
1264 * @delay: delay time for workqueue function
1266 * Schedule @fn(@data) for execution after @delay jiffies using
1267 * port_task. There is one port_task per port and it's the
1268 * user(low level driver)'s responsibility to make sure that only
1269 * one task is active at any given time.
1271 * libata core layer takes care of synchronization between
1272 * port_task and EH. ata_port_queue_task() may be ignored for EH
1276 * Inherited from caller.
1278 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1279 unsigned long delay
)
1283 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
1286 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1287 ap
->port_task_data
= data
;
1289 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1291 /* rc == 0 means that another user is using port task */
1296 * ata_port_flush_task - Flush port_task
1297 * @ap: The ata_port to flush port_task for
1299 * After this function completes, port_task is guranteed not to
1300 * be running or scheduled.
1303 * Kernel thread context (may sleep)
1305 void ata_port_flush_task(struct ata_port
*ap
)
1307 unsigned long flags
;
1311 spin_lock_irqsave(ap
->lock
, flags
);
1312 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1313 spin_unlock_irqrestore(ap
->lock
, flags
);
1315 DPRINTK("flush #1\n");
1316 flush_workqueue(ata_wq
);
1319 * At this point, if a task is running, it's guaranteed to see
1320 * the FLUSH flag; thus, it will never queue pio tasks again.
1323 if (!cancel_delayed_work(&ap
->port_task
)) {
1324 if (ata_msg_ctl(ap
))
1325 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1327 flush_workqueue(ata_wq
);
1330 spin_lock_irqsave(ap
->lock
, flags
);
1331 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1332 spin_unlock_irqrestore(ap
->lock
, flags
);
1334 if (ata_msg_ctl(ap
))
1335 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1338 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1340 struct completion
*waiting
= qc
->private_data
;
1346 * ata_exec_internal_sg - execute libata internal command
1347 * @dev: Device to which the command is sent
1348 * @tf: Taskfile registers for the command and the result
1349 * @cdb: CDB for packet command
1350 * @dma_dir: Data tranfer direction of the command
1351 * @sg: sg list for the data buffer of the command
1352 * @n_elem: Number of sg entries
1354 * Executes libata internal command with timeout. @tf contains
1355 * command on entry and result on return. Timeout and error
1356 * conditions are reported via return value. No recovery action
1357 * is taken after a command times out. It's caller's duty to
1358 * clean up after timeout.
1361 * None. Should be called with kernel context, might sleep.
1364 * Zero on success, AC_ERR_* mask on failure
1366 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1367 struct ata_taskfile
*tf
, const u8
*cdb
,
1368 int dma_dir
, struct scatterlist
*sg
,
1369 unsigned int n_elem
)
1371 struct ata_port
*ap
= dev
->ap
;
1372 u8 command
= tf
->command
;
1373 struct ata_queued_cmd
*qc
;
1374 unsigned int tag
, preempted_tag
;
1375 u32 preempted_sactive
, preempted_qc_active
;
1376 DECLARE_COMPLETION_ONSTACK(wait
);
1377 unsigned long flags
;
1378 unsigned int err_mask
;
1381 spin_lock_irqsave(ap
->lock
, flags
);
1383 /* no internal command while frozen */
1384 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1385 spin_unlock_irqrestore(ap
->lock
, flags
);
1386 return AC_ERR_SYSTEM
;
1389 /* initialize internal qc */
1391 /* XXX: Tag 0 is used for drivers with legacy EH as some
1392 * drivers choke if any other tag is given. This breaks
1393 * ata_tag_internal() test for those drivers. Don't use new
1394 * EH stuff without converting to it.
1396 if (ap
->ops
->error_handler
)
1397 tag
= ATA_TAG_INTERNAL
;
1401 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1403 qc
= __ata_qc_from_tag(ap
, tag
);
1411 preempted_tag
= ap
->active_tag
;
1412 preempted_sactive
= ap
->sactive
;
1413 preempted_qc_active
= ap
->qc_active
;
1414 ap
->active_tag
= ATA_TAG_POISON
;
1418 /* prepare & issue qc */
1421 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1422 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1423 qc
->dma_dir
= dma_dir
;
1424 if (dma_dir
!= DMA_NONE
) {
1425 unsigned int i
, buflen
= 0;
1427 for (i
= 0; i
< n_elem
; i
++)
1428 buflen
+= sg
[i
].length
;
1430 ata_sg_init(qc
, sg
, n_elem
);
1431 qc
->nbytes
= buflen
;
1434 qc
->private_data
= &wait
;
1435 qc
->complete_fn
= ata_qc_complete_internal
;
1439 spin_unlock_irqrestore(ap
->lock
, flags
);
1441 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1443 ata_port_flush_task(ap
);
1446 spin_lock_irqsave(ap
->lock
, flags
);
1448 /* We're racing with irq here. If we lose, the
1449 * following test prevents us from completing the qc
1450 * twice. If we win, the port is frozen and will be
1451 * cleaned up by ->post_internal_cmd().
1453 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1454 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1456 if (ap
->ops
->error_handler
)
1457 ata_port_freeze(ap
);
1459 ata_qc_complete(qc
);
1461 if (ata_msg_warn(ap
))
1462 ata_dev_printk(dev
, KERN_WARNING
,
1463 "qc timeout (cmd 0x%x)\n", command
);
1466 spin_unlock_irqrestore(ap
->lock
, flags
);
1469 /* do post_internal_cmd */
1470 if (ap
->ops
->post_internal_cmd
)
1471 ap
->ops
->post_internal_cmd(qc
);
1473 /* perform minimal error analysis */
1474 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1475 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1476 qc
->err_mask
|= AC_ERR_DEV
;
1479 qc
->err_mask
|= AC_ERR_OTHER
;
1481 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1482 qc
->err_mask
&= ~AC_ERR_OTHER
;
1486 spin_lock_irqsave(ap
->lock
, flags
);
1488 *tf
= qc
->result_tf
;
1489 err_mask
= qc
->err_mask
;
1492 ap
->active_tag
= preempted_tag
;
1493 ap
->sactive
= preempted_sactive
;
1494 ap
->qc_active
= preempted_qc_active
;
1496 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1497 * Until those drivers are fixed, we detect the condition
1498 * here, fail the command with AC_ERR_SYSTEM and reenable the
1501 * Note that this doesn't change any behavior as internal
1502 * command failure results in disabling the device in the
1503 * higher layer for LLDDs without new reset/EH callbacks.
1505 * Kill the following code as soon as those drivers are fixed.
1507 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1508 err_mask
|= AC_ERR_SYSTEM
;
1512 spin_unlock_irqrestore(ap
->lock
, flags
);
1518 * ata_exec_internal - execute libata internal command
1519 * @dev: Device to which the command is sent
1520 * @tf: Taskfile registers for the command and the result
1521 * @cdb: CDB for packet command
1522 * @dma_dir: Data tranfer direction of the command
1523 * @buf: Data buffer of the command
1524 * @buflen: Length of data buffer
1526 * Wrapper around ata_exec_internal_sg() which takes simple
1527 * buffer instead of sg list.
1530 * None. Should be called with kernel context, might sleep.
1533 * Zero on success, AC_ERR_* mask on failure
1535 unsigned ata_exec_internal(struct ata_device
*dev
,
1536 struct ata_taskfile
*tf
, const u8
*cdb
,
1537 int dma_dir
, void *buf
, unsigned int buflen
)
1539 struct scatterlist
*psg
= NULL
, sg
;
1540 unsigned int n_elem
= 0;
1542 if (dma_dir
!= DMA_NONE
) {
1544 sg_init_one(&sg
, buf
, buflen
);
1549 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1553 * ata_do_simple_cmd - execute simple internal command
1554 * @dev: Device to which the command is sent
1555 * @cmd: Opcode to execute
1557 * Execute a 'simple' command, that only consists of the opcode
1558 * 'cmd' itself, without filling any other registers
1561 * Kernel thread context (may sleep).
1564 * Zero on success, AC_ERR_* mask on failure
1566 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1568 struct ata_taskfile tf
;
1570 ata_tf_init(dev
, &tf
);
1573 tf
.flags
|= ATA_TFLAG_DEVICE
;
1574 tf
.protocol
= ATA_PROT_NODATA
;
1576 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1580 * ata_pio_need_iordy - check if iordy needed
1583 * Check if the current speed of the device requires IORDY. Used
1584 * by various controllers for chip configuration.
1587 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1589 /* Controller doesn't support IORDY. Probably a pointless check
1590 as the caller should know this */
1591 if (adev
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1593 /* PIO3 and higher it is mandatory */
1594 if (adev
->pio_mode
> XFER_PIO_2
)
1596 /* We turn it on when possible */
1597 if (ata_id_has_iordy(adev
->id
))
1603 * ata_pio_mask_no_iordy - Return the non IORDY mask
1606 * Compute the highest mode possible if we are not using iordy. Return
1607 * -1 if no iordy mode is available.
1610 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1612 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1613 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1614 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1615 /* Is the speed faster than the drive allows non IORDY ? */
1617 /* This is cycle times not frequency - watch the logic! */
1618 if (pio
> 240) /* PIO2 is 240nS per cycle */
1619 return 3 << ATA_SHIFT_PIO
;
1620 return 7 << ATA_SHIFT_PIO
;
1623 return 3 << ATA_SHIFT_PIO
;
1627 * ata_dev_read_id - Read ID data from the specified device
1628 * @dev: target device
1629 * @p_class: pointer to class of the target device (may be changed)
1630 * @flags: ATA_READID_* flags
1631 * @id: buffer to read IDENTIFY data into
1633 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1634 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1635 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1636 * for pre-ATA4 drives.
1639 * Kernel thread context (may sleep)
1642 * 0 on success, -errno otherwise.
1644 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1645 unsigned int flags
, u16
*id
)
1647 struct ata_port
*ap
= dev
->ap
;
1648 unsigned int class = *p_class
;
1649 struct ata_taskfile tf
;
1650 unsigned int err_mask
= 0;
1654 if (ata_msg_ctl(ap
))
1655 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1657 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1660 ata_tf_init(dev
, &tf
);
1664 tf
.command
= ATA_CMD_ID_ATA
;
1667 tf
.command
= ATA_CMD_ID_ATAPI
;
1671 reason
= "unsupported class";
1675 tf
.protocol
= ATA_PROT_PIO
;
1677 /* Some devices choke if TF registers contain garbage. Make
1678 * sure those are properly initialized.
1680 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1682 /* Device presence detection is unreliable on some
1683 * controllers. Always poll IDENTIFY if available.
1685 tf
.flags
|= ATA_TFLAG_POLLING
;
1687 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1688 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1690 if (err_mask
& AC_ERR_NODEV_HINT
) {
1691 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1692 ap
->print_id
, dev
->devno
);
1697 reason
= "I/O error";
1701 swap_buf_le16(id
, ATA_ID_WORDS
);
1705 reason
= "device reports illegal type";
1707 if (class == ATA_DEV_ATA
) {
1708 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1711 if (ata_id_is_ata(id
))
1715 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1717 * The exact sequence expected by certain pre-ATA4 drives is:
1720 * INITIALIZE DEVICE PARAMETERS
1722 * Some drives were very specific about that exact sequence.
1724 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1725 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1728 reason
= "INIT_DEV_PARAMS failed";
1732 /* current CHS translation info (id[53-58]) might be
1733 * changed. reread the identify device info.
1735 flags
&= ~ATA_READID_POSTRESET
;
1745 if (ata_msg_warn(ap
))
1746 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1747 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1751 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1753 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1756 static void ata_dev_config_ncq(struct ata_device
*dev
,
1757 char *desc
, size_t desc_sz
)
1759 struct ata_port
*ap
= dev
->ap
;
1760 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1762 if (!ata_id_has_ncq(dev
->id
)) {
1766 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1767 snprintf(desc
, desc_sz
, "NCQ (not used)");
1770 if (ap
->flags
& ATA_FLAG_NCQ
) {
1771 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1772 dev
->flags
|= ATA_DFLAG_NCQ
;
1775 if (hdepth
>= ddepth
)
1776 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1778 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1782 * ata_dev_configure - Configure the specified ATA/ATAPI device
1783 * @dev: Target device to configure
1785 * Configure @dev according to @dev->id. Generic and low-level
1786 * driver specific fixups are also applied.
1789 * Kernel thread context (may sleep)
1792 * 0 on success, -errno otherwise
1794 int ata_dev_configure(struct ata_device
*dev
)
1796 struct ata_port
*ap
= dev
->ap
;
1797 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1798 const u16
*id
= dev
->id
;
1799 unsigned int xfer_mask
;
1800 char revbuf
[7]; /* XYZ-99\0 */
1801 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1802 char modelbuf
[ATA_ID_PROD_LEN
+1];
1805 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1806 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1811 if (ata_msg_probe(ap
))
1812 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1815 rc
= ata_acpi_push_id(ap
, dev
->devno
);
1817 ata_dev_printk(dev
, KERN_WARNING
, "failed to set _SDD(%d)\n",
1821 /* retrieve and execute the ATA task file of _GTF */
1822 ata_acpi_exec_tfs(ap
);
1824 /* print device capabilities */
1825 if (ata_msg_probe(ap
))
1826 ata_dev_printk(dev
, KERN_DEBUG
,
1827 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1828 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1830 id
[49], id
[82], id
[83], id
[84],
1831 id
[85], id
[86], id
[87], id
[88]);
1833 /* initialize to-be-configured parameters */
1834 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1835 dev
->max_sectors
= 0;
1843 * common ATA, ATAPI feature tests
1846 /* find max transfer mode; for printk only */
1847 xfer_mask
= ata_id_xfermask(id
);
1849 if (ata_msg_probe(ap
))
1852 /* ATA-specific feature tests */
1853 if (dev
->class == ATA_DEV_ATA
) {
1854 if (ata_id_is_cfa(id
)) {
1855 if (id
[162] & 1) /* CPRM may make this media unusable */
1856 ata_dev_printk(dev
, KERN_WARNING
,
1857 "supports DRM functions and may "
1858 "not be fully accessable.\n");
1859 snprintf(revbuf
, 7, "CFA");
1862 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1864 dev
->n_sectors
= ata_id_n_sectors(id
);
1865 dev
->n_sectors_boot
= dev
->n_sectors
;
1867 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1868 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1871 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1874 if (dev
->id
[59] & 0x100)
1875 dev
->multi_count
= dev
->id
[59] & 0xff;
1877 if (ata_id_has_lba(id
)) {
1878 const char *lba_desc
;
1882 dev
->flags
|= ATA_DFLAG_LBA
;
1883 if (ata_id_has_lba48(id
)) {
1884 dev
->flags
|= ATA_DFLAG_LBA48
;
1887 if (dev
->n_sectors
>= (1UL << 28) &&
1888 ata_id_has_flush_ext(id
))
1889 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1892 if (ata_id_hpa_enabled(dev
->id
))
1893 dev
->n_sectors
= ata_hpa_resize(dev
);
1896 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1898 /* print device info to dmesg */
1899 if (ata_msg_drv(ap
) && print_info
) {
1900 ata_dev_printk(dev
, KERN_INFO
,
1901 "%s: %s, %s, max %s\n",
1902 revbuf
, modelbuf
, fwrevbuf
,
1903 ata_mode_string(xfer_mask
));
1904 ata_dev_printk(dev
, KERN_INFO
,
1905 "%Lu sectors, multi %u: %s %s\n",
1906 (unsigned long long)dev
->n_sectors
,
1907 dev
->multi_count
, lba_desc
, ncq_desc
);
1912 /* Default translation */
1913 dev
->cylinders
= id
[1];
1915 dev
->sectors
= id
[6];
1917 if (ata_id_current_chs_valid(id
)) {
1918 /* Current CHS translation is valid. */
1919 dev
->cylinders
= id
[54];
1920 dev
->heads
= id
[55];
1921 dev
->sectors
= id
[56];
1924 /* print device info to dmesg */
1925 if (ata_msg_drv(ap
) && print_info
) {
1926 ata_dev_printk(dev
, KERN_INFO
,
1927 "%s: %s, %s, max %s\n",
1928 revbuf
, modelbuf
, fwrevbuf
,
1929 ata_mode_string(xfer_mask
));
1930 ata_dev_printk(dev
, KERN_INFO
,
1931 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1932 (unsigned long long)dev
->n_sectors
,
1933 dev
->multi_count
, dev
->cylinders
,
1934 dev
->heads
, dev
->sectors
);
1941 /* ATAPI-specific feature tests */
1942 else if (dev
->class == ATA_DEV_ATAPI
) {
1943 char *cdb_intr_string
= "";
1945 rc
= atapi_cdb_len(id
);
1946 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1947 if (ata_msg_warn(ap
))
1948 ata_dev_printk(dev
, KERN_WARNING
,
1949 "unsupported CDB len\n");
1953 dev
->cdb_len
= (unsigned int) rc
;
1955 if (ata_id_cdb_intr(dev
->id
)) {
1956 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1957 cdb_intr_string
= ", CDB intr";
1960 /* print device info to dmesg */
1961 if (ata_msg_drv(ap
) && print_info
)
1962 ata_dev_printk(dev
, KERN_INFO
, "ATAPI, max %s%s\n",
1963 ata_mode_string(xfer_mask
),
1967 /* determine max_sectors */
1968 dev
->max_sectors
= ATA_MAX_SECTORS
;
1969 if (dev
->flags
& ATA_DFLAG_LBA48
)
1970 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
1972 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
1973 /* Let the user know. We don't want to disallow opens for
1974 rescue purposes, or in case the vendor is just a blithering
1977 ata_dev_printk(dev
, KERN_WARNING
,
1978 "Drive reports diagnostics failure. This may indicate a drive\n");
1979 ata_dev_printk(dev
, KERN_WARNING
,
1980 "fault or invalid emulation. Contact drive vendor for information.\n");
1984 /* limit bridge transfers to udma5, 200 sectors */
1985 if (ata_dev_knobble(dev
)) {
1986 if (ata_msg_drv(ap
) && print_info
)
1987 ata_dev_printk(dev
, KERN_INFO
,
1988 "applying bridge limits\n");
1989 dev
->udma_mask
&= ATA_UDMA5
;
1990 dev
->max_sectors
= ATA_MAX_SECTORS
;
1993 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_MAX_SEC_128
)
1994 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
1997 /* limit ATAPI DMA to R/W commands only */
1998 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_DMA_RW_ONLY
)
1999 dev
->horkage
|= ATA_HORKAGE_DMA_RW_ONLY
;
2001 if (ap
->ops
->dev_config
)
2002 ap
->ops
->dev_config(dev
);
2004 if (ata_msg_probe(ap
))
2005 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2006 __FUNCTION__
, ata_chk_status(ap
));
2010 if (ata_msg_probe(ap
))
2011 ata_dev_printk(dev
, KERN_DEBUG
,
2012 "%s: EXIT, err\n", __FUNCTION__
);
2017 * ata_cable_40wire - return 40 wire cable type
2020 * Helper method for drivers which want to hardwire 40 wire cable
2024 int ata_cable_40wire(struct ata_port
*ap
)
2026 return ATA_CBL_PATA40
;
2030 * ata_cable_80wire - return 80 wire cable type
2033 * Helper method for drivers which want to hardwire 80 wire cable
2037 int ata_cable_80wire(struct ata_port
*ap
)
2039 return ATA_CBL_PATA80
;
2043 * ata_cable_unknown - return unknown PATA cable.
2046 * Helper method for drivers which have no PATA cable detection.
2049 int ata_cable_unknown(struct ata_port
*ap
)
2051 return ATA_CBL_PATA_UNK
;
2055 * ata_cable_sata - return SATA cable type
2058 * Helper method for drivers which have SATA cables
2061 int ata_cable_sata(struct ata_port
*ap
)
2063 return ATA_CBL_SATA
;
2067 * ata_bus_probe - Reset and probe ATA bus
2070 * Master ATA bus probing function. Initiates a hardware-dependent
2071 * bus reset, then attempts to identify any devices found on
2075 * PCI/etc. bus probe sem.
2078 * Zero on success, negative errno otherwise.
2081 int ata_bus_probe(struct ata_port
*ap
)
2083 unsigned int classes
[ATA_MAX_DEVICES
];
2084 int tries
[ATA_MAX_DEVICES
];
2086 struct ata_device
*dev
;
2090 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2091 tries
[i
] = ATA_PROBE_MAX_TRIES
;
2094 /* reset and determine device classes */
2095 ap
->ops
->phy_reset(ap
);
2097 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2098 dev
= &ap
->device
[i
];
2100 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2101 dev
->class != ATA_DEV_UNKNOWN
)
2102 classes
[dev
->devno
] = dev
->class;
2104 classes
[dev
->devno
] = ATA_DEV_NONE
;
2106 dev
->class = ATA_DEV_UNKNOWN
;
2111 /* after the reset the device state is PIO 0 and the controller
2112 state is undefined. Record the mode */
2114 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2115 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
2117 /* read IDENTIFY page and configure devices. We have to do the identify
2118 specific sequence bass-ackwards so that PDIAG- is released by
2121 for (i
= ATA_MAX_DEVICES
- 1; i
>= 0; i
--) {
2122 dev
= &ap
->device
[i
];
2125 dev
->class = classes
[i
];
2127 if (!ata_dev_enabled(dev
))
2130 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2136 /* Now ask for the cable type as PDIAG- should have been released */
2137 if (ap
->ops
->cable_detect
)
2138 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2140 /* After the identify sequence we can now set up the devices. We do
2141 this in the normal order so that the user doesn't get confused */
2143 for(i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2144 dev
= &ap
->device
[i
];
2145 if (!ata_dev_enabled(dev
))
2148 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2149 rc
= ata_dev_configure(dev
);
2150 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2155 /* configure transfer mode */
2156 rc
= ata_set_mode(ap
, &dev
);
2160 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2161 if (ata_dev_enabled(&ap
->device
[i
]))
2164 /* no device present, disable port */
2165 ata_port_disable(ap
);
2166 ap
->ops
->port_disable(ap
);
2170 tries
[dev
->devno
]--;
2174 /* eeek, something went very wrong, give up */
2175 tries
[dev
->devno
] = 0;
2179 /* give it just one more chance */
2180 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2182 if (tries
[dev
->devno
] == 1) {
2183 /* This is the last chance, better to slow
2184 * down than lose it.
2186 sata_down_spd_limit(ap
);
2187 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2191 if (!tries
[dev
->devno
])
2192 ata_dev_disable(dev
);
2198 * ata_port_probe - Mark port as enabled
2199 * @ap: Port for which we indicate enablement
2201 * Modify @ap data structure such that the system
2202 * thinks that the entire port is enabled.
2204 * LOCKING: host lock, or some other form of
2208 void ata_port_probe(struct ata_port
*ap
)
2210 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2214 * sata_print_link_status - Print SATA link status
2215 * @ap: SATA port to printk link status about
2217 * This function prints link speed and status of a SATA link.
2222 void sata_print_link_status(struct ata_port
*ap
)
2224 u32 sstatus
, scontrol
, tmp
;
2226 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
2228 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
2230 if (ata_port_online(ap
)) {
2231 tmp
= (sstatus
>> 4) & 0xf;
2232 ata_port_printk(ap
, KERN_INFO
,
2233 "SATA link up %s (SStatus %X SControl %X)\n",
2234 sata_spd_string(tmp
), sstatus
, scontrol
);
2236 ata_port_printk(ap
, KERN_INFO
,
2237 "SATA link down (SStatus %X SControl %X)\n",
2243 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2244 * @ap: SATA port associated with target SATA PHY.
2246 * This function issues commands to standard SATA Sxxx
2247 * PHY registers, to wake up the phy (and device), and
2248 * clear any reset condition.
2251 * PCI/etc. bus probe sem.
2254 void __sata_phy_reset(struct ata_port
*ap
)
2257 unsigned long timeout
= jiffies
+ (HZ
* 5);
2259 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2260 /* issue phy wake/reset */
2261 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2262 /* Couldn't find anything in SATA I/II specs, but
2263 * AHCI-1.1 10.4.2 says at least 1 ms. */
2266 /* phy wake/clear reset */
2267 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2269 /* wait for phy to become ready, if necessary */
2272 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2273 if ((sstatus
& 0xf) != 1)
2275 } while (time_before(jiffies
, timeout
));
2277 /* print link status */
2278 sata_print_link_status(ap
);
2280 /* TODO: phy layer with polling, timeouts, etc. */
2281 if (!ata_port_offline(ap
))
2284 ata_port_disable(ap
);
2286 if (ap
->flags
& ATA_FLAG_DISABLED
)
2289 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2290 ata_port_disable(ap
);
2294 ap
->cbl
= ATA_CBL_SATA
;
2298 * sata_phy_reset - Reset SATA bus.
2299 * @ap: SATA port associated with target SATA PHY.
2301 * This function resets the SATA bus, and then probes
2302 * the bus for devices.
2305 * PCI/etc. bus probe sem.
2308 void sata_phy_reset(struct ata_port
*ap
)
2310 __sata_phy_reset(ap
);
2311 if (ap
->flags
& ATA_FLAG_DISABLED
)
2317 * ata_dev_pair - return other device on cable
2320 * Obtain the other device on the same cable, or if none is
2321 * present NULL is returned
2324 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2326 struct ata_port
*ap
= adev
->ap
;
2327 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2328 if (!ata_dev_enabled(pair
))
2334 * ata_port_disable - Disable port.
2335 * @ap: Port to be disabled.
2337 * Modify @ap data structure such that the system
2338 * thinks that the entire port is disabled, and should
2339 * never attempt to probe or communicate with devices
2342 * LOCKING: host lock, or some other form of
2346 void ata_port_disable(struct ata_port
*ap
)
2348 ap
->device
[0].class = ATA_DEV_NONE
;
2349 ap
->device
[1].class = ATA_DEV_NONE
;
2350 ap
->flags
|= ATA_FLAG_DISABLED
;
2354 * sata_down_spd_limit - adjust SATA spd limit downward
2355 * @ap: Port to adjust SATA spd limit for
2357 * Adjust SATA spd limit of @ap downward. Note that this
2358 * function only adjusts the limit. The change must be applied
2359 * using sata_set_spd().
2362 * Inherited from caller.
2365 * 0 on success, negative errno on failure
2367 int sata_down_spd_limit(struct ata_port
*ap
)
2369 u32 sstatus
, spd
, mask
;
2372 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2376 mask
= ap
->sata_spd_limit
;
2379 highbit
= fls(mask
) - 1;
2380 mask
&= ~(1 << highbit
);
2382 spd
= (sstatus
>> 4) & 0xf;
2386 mask
&= (1 << spd
) - 1;
2390 ap
->sata_spd_limit
= mask
;
2392 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2393 sata_spd_string(fls(mask
)));
2398 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2402 if (ap
->sata_spd_limit
== UINT_MAX
)
2405 limit
= fls(ap
->sata_spd_limit
);
2407 spd
= (*scontrol
>> 4) & 0xf;
2408 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2410 return spd
!= limit
;
2414 * sata_set_spd_needed - is SATA spd configuration needed
2415 * @ap: Port in question
2417 * Test whether the spd limit in SControl matches
2418 * @ap->sata_spd_limit. This function is used to determine
2419 * whether hardreset is necessary to apply SATA spd
2423 * Inherited from caller.
2426 * 1 if SATA spd configuration is needed, 0 otherwise.
2428 int sata_set_spd_needed(struct ata_port
*ap
)
2432 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2435 return __sata_set_spd_needed(ap
, &scontrol
);
2439 * sata_set_spd - set SATA spd according to spd limit
2440 * @ap: Port to set SATA spd for
2442 * Set SATA spd of @ap according to sata_spd_limit.
2445 * Inherited from caller.
2448 * 0 if spd doesn't need to be changed, 1 if spd has been
2449 * changed. Negative errno if SCR registers are inaccessible.
2451 int sata_set_spd(struct ata_port
*ap
)
2456 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2459 if (!__sata_set_spd_needed(ap
, &scontrol
))
2462 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2469 * This mode timing computation functionality is ported over from
2470 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2473 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2474 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2475 * for UDMA6, which is currently supported only by Maxtor drives.
2477 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2480 static const struct ata_timing ata_timing
[] = {
2482 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2483 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2484 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2485 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2487 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2488 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2489 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2490 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2491 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2493 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2495 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2496 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2497 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2499 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2500 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2501 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2503 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2504 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2505 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2506 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2508 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2509 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2510 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2512 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2517 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2518 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2520 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2522 q
->setup
= EZ(t
->setup
* 1000, T
);
2523 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2524 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2525 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2526 q
->active
= EZ(t
->active
* 1000, T
);
2527 q
->recover
= EZ(t
->recover
* 1000, T
);
2528 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2529 q
->udma
= EZ(t
->udma
* 1000, UT
);
2532 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2533 struct ata_timing
*m
, unsigned int what
)
2535 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2536 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2537 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2538 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2539 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2540 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2541 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2542 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2545 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2547 const struct ata_timing
*t
;
2549 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2550 if (t
->mode
== 0xFF)
2555 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2556 struct ata_timing
*t
, int T
, int UT
)
2558 const struct ata_timing
*s
;
2559 struct ata_timing p
;
2565 if (!(s
= ata_timing_find_mode(speed
)))
2568 memcpy(t
, s
, sizeof(*s
));
2571 * If the drive is an EIDE drive, it can tell us it needs extended
2572 * PIO/MW_DMA cycle timing.
2575 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2576 memset(&p
, 0, sizeof(p
));
2577 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2578 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2579 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2580 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2581 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2583 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2587 * Convert the timing to bus clock counts.
2590 ata_timing_quantize(t
, t
, T
, UT
);
2593 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2594 * S.M.A.R.T * and some other commands. We have to ensure that the
2595 * DMA cycle timing is slower/equal than the fastest PIO timing.
2598 if (speed
> XFER_PIO_6
) {
2599 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2600 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2604 * Lengthen active & recovery time so that cycle time is correct.
2607 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2608 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2609 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2612 if (t
->active
+ t
->recover
< t
->cycle
) {
2613 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2614 t
->recover
= t
->cycle
- t
->active
;
2621 * ata_down_xfermask_limit - adjust dev xfer masks downward
2622 * @dev: Device to adjust xfer masks
2623 * @sel: ATA_DNXFER_* selector
2625 * Adjust xfer masks of @dev downward. Note that this function
2626 * does not apply the change. Invoking ata_set_mode() afterwards
2627 * will apply the limit.
2630 * Inherited from caller.
2633 * 0 on success, negative errno on failure
2635 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2638 unsigned int orig_mask
, xfer_mask
;
2639 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2642 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2643 sel
&= ~ATA_DNXFER_QUIET
;
2645 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2648 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2651 case ATA_DNXFER_PIO
:
2652 highbit
= fls(pio_mask
) - 1;
2653 pio_mask
&= ~(1 << highbit
);
2656 case ATA_DNXFER_DMA
:
2658 highbit
= fls(udma_mask
) - 1;
2659 udma_mask
&= ~(1 << highbit
);
2662 } else if (mwdma_mask
) {
2663 highbit
= fls(mwdma_mask
) - 1;
2664 mwdma_mask
&= ~(1 << highbit
);
2670 case ATA_DNXFER_40C
:
2671 udma_mask
&= ATA_UDMA_MASK_40C
;
2674 case ATA_DNXFER_FORCE_PIO0
:
2676 case ATA_DNXFER_FORCE_PIO
:
2685 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2687 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2691 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2692 snprintf(buf
, sizeof(buf
), "%s:%s",
2693 ata_mode_string(xfer_mask
),
2694 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2696 snprintf(buf
, sizeof(buf
), "%s",
2697 ata_mode_string(xfer_mask
));
2699 ata_dev_printk(dev
, KERN_WARNING
,
2700 "limiting speed to %s\n", buf
);
2703 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2709 static int ata_dev_set_mode(struct ata_device
*dev
)
2711 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2712 unsigned int err_mask
;
2715 dev
->flags
&= ~ATA_DFLAG_PIO
;
2716 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2717 dev
->flags
|= ATA_DFLAG_PIO
;
2719 err_mask
= ata_dev_set_xfermode(dev
);
2720 /* Old CFA may refuse this command, which is just fine */
2721 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2722 err_mask
&= ~AC_ERR_DEV
;
2725 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2726 "(err_mask=0x%x)\n", err_mask
);
2730 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2731 rc
= ata_dev_revalidate(dev
, 0);
2732 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2736 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2737 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2739 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2740 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2745 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2746 * @ap: port on which timings will be programmed
2747 * @r_failed_dev: out paramter for failed device
2749 * Standard implementation of the function used to tune and set
2750 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2751 * ata_dev_set_mode() fails, pointer to the failing device is
2752 * returned in @r_failed_dev.
2755 * PCI/etc. bus probe sem.
2758 * 0 on success, negative errno otherwise
2761 int ata_do_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2763 struct ata_device
*dev
;
2764 int i
, rc
= 0, used_dma
= 0, found
= 0;
2767 /* step 1: calculate xfer_mask */
2768 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2769 unsigned int pio_mask
, dma_mask
;
2771 dev
= &ap
->device
[i
];
2773 if (!ata_dev_enabled(dev
))
2776 ata_dev_xfermask(dev
);
2778 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2779 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2780 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2781 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2790 /* step 2: always set host PIO timings */
2791 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2792 dev
= &ap
->device
[i
];
2793 if (!ata_dev_enabled(dev
))
2796 if (!dev
->pio_mode
) {
2797 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2802 dev
->xfer_mode
= dev
->pio_mode
;
2803 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2804 if (ap
->ops
->set_piomode
)
2805 ap
->ops
->set_piomode(ap
, dev
);
2808 /* step 3: set host DMA timings */
2809 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2810 dev
= &ap
->device
[i
];
2812 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2815 dev
->xfer_mode
= dev
->dma_mode
;
2816 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2817 if (ap
->ops
->set_dmamode
)
2818 ap
->ops
->set_dmamode(ap
, dev
);
2821 /* step 4: update devices' xfer mode */
2822 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2823 dev
= &ap
->device
[i
];
2825 /* don't update suspended devices' xfer mode */
2826 if (!ata_dev_ready(dev
))
2829 rc
= ata_dev_set_mode(dev
);
2834 /* Record simplex status. If we selected DMA then the other
2835 * host channels are not permitted to do so.
2837 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2838 ap
->host
->simplex_claimed
= ap
;
2840 /* step5: chip specific finalisation */
2841 if (ap
->ops
->post_set_mode
)
2842 ap
->ops
->post_set_mode(ap
);
2845 *r_failed_dev
= dev
;
2850 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2851 * @ap: port on which timings will be programmed
2852 * @r_failed_dev: out paramter for failed device
2854 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2855 * ata_set_mode() fails, pointer to the failing device is
2856 * returned in @r_failed_dev.
2859 * PCI/etc. bus probe sem.
2862 * 0 on success, negative errno otherwise
2864 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2866 /* has private set_mode? */
2867 if (ap
->ops
->set_mode
)
2868 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2869 return ata_do_set_mode(ap
, r_failed_dev
);
2873 * ata_tf_to_host - issue ATA taskfile to host controller
2874 * @ap: port to which command is being issued
2875 * @tf: ATA taskfile register set
2877 * Issues ATA taskfile register set to ATA host controller,
2878 * with proper synchronization with interrupt handler and
2882 * spin_lock_irqsave(host lock)
2885 static inline void ata_tf_to_host(struct ata_port
*ap
,
2886 const struct ata_taskfile
*tf
)
2888 ap
->ops
->tf_load(ap
, tf
);
2889 ap
->ops
->exec_command(ap
, tf
);
2893 * ata_busy_sleep - sleep until BSY clears, or timeout
2894 * @ap: port containing status register to be polled
2895 * @tmout_pat: impatience timeout
2896 * @tmout: overall timeout
2898 * Sleep until ATA Status register bit BSY clears,
2899 * or a timeout occurs.
2902 * Kernel thread context (may sleep).
2905 * 0 on success, -errno otherwise.
2907 int ata_busy_sleep(struct ata_port
*ap
,
2908 unsigned long tmout_pat
, unsigned long tmout
)
2910 unsigned long timer_start
, timeout
;
2913 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2914 timer_start
= jiffies
;
2915 timeout
= timer_start
+ tmout_pat
;
2916 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2917 time_before(jiffies
, timeout
)) {
2919 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2922 if (status
!= 0xff && (status
& ATA_BUSY
))
2923 ata_port_printk(ap
, KERN_WARNING
,
2924 "port is slow to respond, please be patient "
2925 "(Status 0x%x)\n", status
);
2927 timeout
= timer_start
+ tmout
;
2928 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2929 time_before(jiffies
, timeout
)) {
2931 status
= ata_chk_status(ap
);
2937 if (status
& ATA_BUSY
) {
2938 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2939 "(%lu secs, Status 0x%x)\n",
2940 tmout
/ HZ
, status
);
2947 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2949 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2950 unsigned int dev0
= devmask
& (1 << 0);
2951 unsigned int dev1
= devmask
& (1 << 1);
2952 unsigned long timeout
;
2954 /* if device 0 was found in ata_devchk, wait for its
2958 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2960 /* if device 1 was found in ata_devchk, wait for
2961 * register access, then wait for BSY to clear
2963 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2967 ap
->ops
->dev_select(ap
, 1);
2968 nsect
= ioread8(ioaddr
->nsect_addr
);
2969 lbal
= ioread8(ioaddr
->lbal_addr
);
2970 if ((nsect
== 1) && (lbal
== 1))
2972 if (time_after(jiffies
, timeout
)) {
2976 msleep(50); /* give drive a breather */
2979 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2981 /* is all this really necessary? */
2982 ap
->ops
->dev_select(ap
, 0);
2984 ap
->ops
->dev_select(ap
, 1);
2986 ap
->ops
->dev_select(ap
, 0);
2989 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2990 unsigned int devmask
)
2992 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2994 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
2996 /* software reset. causes dev0 to be selected */
2997 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
2998 udelay(20); /* FIXME: flush */
2999 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3000 udelay(20); /* FIXME: flush */
3001 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3003 /* spec mandates ">= 2ms" before checking status.
3004 * We wait 150ms, because that was the magic delay used for
3005 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3006 * between when the ATA command register is written, and then
3007 * status is checked. Because waiting for "a while" before
3008 * checking status is fine, post SRST, we perform this magic
3009 * delay here as well.
3011 * Old drivers/ide uses the 2mS rule and then waits for ready
3015 /* Before we perform post reset processing we want to see if
3016 * the bus shows 0xFF because the odd clown forgets the D7
3017 * pulldown resistor.
3019 if (ata_check_status(ap
) == 0xFF)
3022 ata_bus_post_reset(ap
, devmask
);
3028 * ata_bus_reset - reset host port and associated ATA channel
3029 * @ap: port to reset
3031 * This is typically the first time we actually start issuing
3032 * commands to the ATA channel. We wait for BSY to clear, then
3033 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3034 * result. Determine what devices, if any, are on the channel
3035 * by looking at the device 0/1 error register. Look at the signature
3036 * stored in each device's taskfile registers, to determine if
3037 * the device is ATA or ATAPI.
3040 * PCI/etc. bus probe sem.
3041 * Obtains host lock.
3044 * Sets ATA_FLAG_DISABLED if bus reset fails.
3047 void ata_bus_reset(struct ata_port
*ap
)
3049 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3050 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3052 unsigned int dev0
, dev1
= 0, devmask
= 0;
3054 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3056 /* determine if device 0/1 are present */
3057 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3060 dev0
= ata_devchk(ap
, 0);
3062 dev1
= ata_devchk(ap
, 1);
3066 devmask
|= (1 << 0);
3068 devmask
|= (1 << 1);
3070 /* select device 0 again */
3071 ap
->ops
->dev_select(ap
, 0);
3073 /* issue bus reset */
3074 if (ap
->flags
& ATA_FLAG_SRST
)
3075 if (ata_bus_softreset(ap
, devmask
))
3079 * determine by signature whether we have ATA or ATAPI devices
3081 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
3082 if ((slave_possible
) && (err
!= 0x81))
3083 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
3085 /* re-enable interrupts */
3086 ap
->ops
->irq_on(ap
);
3088 /* is double-select really necessary? */
3089 if (ap
->device
[1].class != ATA_DEV_NONE
)
3090 ap
->ops
->dev_select(ap
, 1);
3091 if (ap
->device
[0].class != ATA_DEV_NONE
)
3092 ap
->ops
->dev_select(ap
, 0);
3094 /* if no devices were detected, disable this port */
3095 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
3096 (ap
->device
[1].class == ATA_DEV_NONE
))
3099 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3100 /* set up device control for ATA_FLAG_SATA_RESET */
3101 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3108 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3109 ap
->ops
->port_disable(ap
);
3115 * sata_phy_debounce - debounce SATA phy status
3116 * @ap: ATA port to debounce SATA phy status for
3117 * @params: timing parameters { interval, duratinon, timeout } in msec
3119 * Make sure SStatus of @ap reaches stable state, determined by
3120 * holding the same value where DET is not 1 for @duration polled
3121 * every @interval, before @timeout. Timeout constraints the
3122 * beginning of the stable state. Because, after hot unplugging,
3123 * DET gets stuck at 1 on some controllers, this functions waits
3124 * until timeout then returns 0 if DET is stable at 1.
3127 * Kernel thread context (may sleep)
3130 * 0 on success, -errno on failure.
3132 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
)
3134 unsigned long interval_msec
= params
[0];
3135 unsigned long duration
= params
[1] * HZ
/ 1000;
3136 unsigned long timeout
= jiffies
+ params
[2] * HZ
/ 1000;
3137 unsigned long last_jiffies
;
3141 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3146 last_jiffies
= jiffies
;
3149 msleep(interval_msec
);
3150 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3156 if (cur
== 1 && time_before(jiffies
, timeout
))
3158 if (time_after(jiffies
, last_jiffies
+ duration
))
3163 /* unstable, start over */
3165 last_jiffies
= jiffies
;
3168 if (time_after(jiffies
, timeout
))
3174 * sata_phy_resume - resume SATA phy
3175 * @ap: ATA port to resume SATA phy for
3176 * @params: timing parameters { interval, duratinon, timeout } in msec
3178 * Resume SATA phy of @ap and debounce it.
3181 * Kernel thread context (may sleep)
3184 * 0 on success, -errno on failure.
3186 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
)
3191 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3194 scontrol
= (scontrol
& 0x0f0) | 0x300;
3196 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3199 /* Some PHYs react badly if SStatus is pounded immediately
3200 * after resuming. Delay 200ms before debouncing.
3204 return sata_phy_debounce(ap
, params
);
3207 static void ata_wait_spinup(struct ata_port
*ap
)
3209 struct ata_eh_context
*ehc
= &ap
->eh_context
;
3210 unsigned long end
, secs
;
3213 /* first, debounce phy if SATA */
3214 if (ap
->cbl
== ATA_CBL_SATA
) {
3215 rc
= sata_phy_debounce(ap
, sata_deb_timing_hotplug
);
3217 /* if debounced successfully and offline, no need to wait */
3218 if ((rc
== 0 || rc
== -EOPNOTSUPP
) && ata_port_offline(ap
))
3222 /* okay, let's give the drive time to spin up */
3223 end
= ehc
->i
.hotplug_timestamp
+ ATA_SPINUP_WAIT
* HZ
/ 1000;
3224 secs
= ((end
- jiffies
) + HZ
- 1) / HZ
;
3226 if (time_after(jiffies
, end
))
3230 ata_port_printk(ap
, KERN_INFO
, "waiting for device to spin up "
3231 "(%lu secs)\n", secs
);
3233 schedule_timeout_uninterruptible(end
- jiffies
);
3237 * ata_std_prereset - prepare for reset
3238 * @ap: ATA port to be reset
3240 * @ap is about to be reset. Initialize it.
3243 * Kernel thread context (may sleep)
3246 * 0 on success, -errno otherwise.
3248 int ata_std_prereset(struct ata_port
*ap
)
3250 struct ata_eh_context
*ehc
= &ap
->eh_context
;
3251 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3254 /* handle link resume & hotplug spinup */
3255 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3256 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
3257 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3259 if ((ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
) &&
3260 (ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
))
3261 ata_wait_spinup(ap
);
3263 /* if we're about to do hardreset, nothing more to do */
3264 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3267 /* if SATA, resume phy */
3268 if (ap
->cbl
== ATA_CBL_SATA
) {
3269 rc
= sata_phy_resume(ap
, timing
);
3270 if (rc
&& rc
!= -EOPNOTSUPP
) {
3271 /* phy resume failed */
3272 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
3273 "link for reset (errno=%d)\n", rc
);
3278 /* Wait for !BSY if the controller can wait for the first D2H
3279 * Reg FIS and we don't know that no device is attached.
3281 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
))
3282 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
3288 * ata_std_softreset - reset host port via ATA SRST
3289 * @ap: port to reset
3290 * @classes: resulting classes of attached devices
3292 * Reset host port using ATA SRST.
3295 * Kernel thread context (may sleep)
3298 * 0 on success, -errno otherwise.
3300 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
)
3302 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3303 unsigned int devmask
= 0, err_mask
;
3308 if (ata_port_offline(ap
)) {
3309 classes
[0] = ATA_DEV_NONE
;
3313 /* determine if device 0/1 are present */
3314 if (ata_devchk(ap
, 0))
3315 devmask
|= (1 << 0);
3316 if (slave_possible
&& ata_devchk(ap
, 1))
3317 devmask
|= (1 << 1);
3319 /* select device 0 again */
3320 ap
->ops
->dev_select(ap
, 0);
3322 /* issue bus reset */
3323 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3324 err_mask
= ata_bus_softreset(ap
, devmask
);
3326 ata_port_printk(ap
, KERN_ERR
, "SRST failed (err_mask=0x%x)\n",
3331 /* determine by signature whether we have ATA or ATAPI devices */
3332 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3333 if (slave_possible
&& err
!= 0x81)
3334 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3337 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3342 * sata_port_hardreset - reset port via SATA phy reset
3343 * @ap: port to reset
3344 * @timing: timing parameters { interval, duratinon, timeout } in msec
3346 * SATA phy-reset host port using DET bits of SControl register.
3349 * Kernel thread context (may sleep)
3352 * 0 on success, -errno otherwise.
3354 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
)
3361 if (sata_set_spd_needed(ap
)) {
3362 /* SATA spec says nothing about how to reconfigure
3363 * spd. To be on the safe side, turn off phy during
3364 * reconfiguration. This works for at least ICH7 AHCI
3367 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3370 scontrol
= (scontrol
& 0x0f0) | 0x304;
3372 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3378 /* issue phy wake/reset */
3379 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3382 scontrol
= (scontrol
& 0x0f0) | 0x301;
3384 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3387 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3388 * 10.4.2 says at least 1 ms.
3392 /* bring phy back */
3393 rc
= sata_phy_resume(ap
, timing
);
3395 DPRINTK("EXIT, rc=%d\n", rc
);
3400 * sata_std_hardreset - reset host port via SATA phy reset
3401 * @ap: port to reset
3402 * @class: resulting class of attached device
3404 * SATA phy-reset host port using DET bits of SControl register,
3405 * wait for !BSY and classify the attached device.
3408 * Kernel thread context (may sleep)
3411 * 0 on success, -errno otherwise.
3413 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class)
3415 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3421 rc
= sata_port_hardreset(ap
, timing
);
3423 ata_port_printk(ap
, KERN_ERR
,
3424 "COMRESET failed (errno=%d)\n", rc
);
3428 /* TODO: phy layer with polling, timeouts, etc. */
3429 if (ata_port_offline(ap
)) {
3430 *class = ATA_DEV_NONE
;
3431 DPRINTK("EXIT, link offline\n");
3435 /* wait a while before checking status, see SRST for more info */
3438 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
3439 ata_port_printk(ap
, KERN_ERR
,
3440 "COMRESET failed (device not ready)\n");
3444 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3446 *class = ata_dev_try_classify(ap
, 0, NULL
);
3448 DPRINTK("EXIT, class=%u\n", *class);
3453 * ata_std_postreset - standard postreset callback
3454 * @ap: the target ata_port
3455 * @classes: classes of attached devices
3457 * This function is invoked after a successful reset. Note that
3458 * the device might have been reset more than once using
3459 * different reset methods before postreset is invoked.
3462 * Kernel thread context (may sleep)
3464 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3470 /* print link status */
3471 sata_print_link_status(ap
);
3474 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3475 sata_scr_write(ap
, SCR_ERROR
, serror
);
3477 /* re-enable interrupts */
3478 if (!ap
->ops
->error_handler
)
3479 ap
->ops
->irq_on(ap
);
3481 /* is double-select really necessary? */
3482 if (classes
[0] != ATA_DEV_NONE
)
3483 ap
->ops
->dev_select(ap
, 1);
3484 if (classes
[1] != ATA_DEV_NONE
)
3485 ap
->ops
->dev_select(ap
, 0);
3487 /* bail out if no device is present */
3488 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3489 DPRINTK("EXIT, no device\n");
3493 /* set up device control */
3494 if (ap
->ioaddr
.ctl_addr
)
3495 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3501 * ata_dev_same_device - Determine whether new ID matches configured device
3502 * @dev: device to compare against
3503 * @new_class: class of the new device
3504 * @new_id: IDENTIFY page of the new device
3506 * Compare @new_class and @new_id against @dev and determine
3507 * whether @dev is the device indicated by @new_class and
3514 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3516 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3519 const u16
*old_id
= dev
->id
;
3520 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3521 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3524 if (dev
->class != new_class
) {
3525 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3526 dev
->class, new_class
);
3530 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3531 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3532 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3533 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3534 new_n_sectors
= ata_id_n_sectors(new_id
);
3536 if (strcmp(model
[0], model
[1])) {
3537 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3538 "'%s' != '%s'\n", model
[0], model
[1]);
3542 if (strcmp(serial
[0], serial
[1])) {
3543 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3544 "'%s' != '%s'\n", serial
[0], serial
[1]);
3548 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= new_n_sectors
) {
3549 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3551 (unsigned long long)dev
->n_sectors
,
3552 (unsigned long long)new_n_sectors
);
3553 /* Are we the boot time size - if so we appear to be the
3554 same disk at this point and our HPA got reapplied */
3555 if (ata_ignore_hpa
&& dev
->n_sectors_boot
== new_n_sectors
3556 && ata_id_hpa_enabled(new_id
))
3565 * ata_dev_revalidate - Revalidate ATA device
3566 * @dev: device to revalidate
3567 * @readid_flags: read ID flags
3569 * Re-read IDENTIFY page and make sure @dev is still attached to
3573 * Kernel thread context (may sleep)
3576 * 0 on success, negative errno otherwise
3578 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3580 unsigned int class = dev
->class;
3581 u16
*id
= (void *)dev
->ap
->sector_buf
;
3584 if (!ata_dev_enabled(dev
)) {
3590 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3594 /* is the device still there? */
3595 if (!ata_dev_same_device(dev
, class, id
)) {
3600 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3602 /* configure device according to the new ID */
3603 rc
= ata_dev_configure(dev
);
3608 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3612 struct ata_blacklist_entry
{
3613 const char *model_num
;
3614 const char *model_rev
;
3615 unsigned long horkage
;
3618 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3619 /* Devices with DMA related problems under Linux */
3620 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3621 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3622 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3623 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3624 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3625 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3626 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3627 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3628 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3629 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3630 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3631 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3632 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3633 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3634 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3635 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3636 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3637 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3638 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3639 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3640 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3641 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3642 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3643 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3644 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3645 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3646 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3647 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3648 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3650 /* Weird ATAPI devices */
3651 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
|
3652 ATA_HORKAGE_DMA_RW_ONLY
},
3654 /* Devices we expect to fail diagnostics */
3656 /* Devices where NCQ should be avoided */
3658 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3659 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3660 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3662 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3663 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3664 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3665 /* Blacklist entries taken from Silicon Image 3124/3132
3666 Windows driver .inf file - also several Linux problem reports */
3667 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3668 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3669 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3671 /* Devices with NCQ limits */
3677 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3679 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3680 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3681 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3683 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3684 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3686 while (ad
->model_num
) {
3687 if (!strcmp(ad
->model_num
, model_num
)) {
3688 if (ad
->model_rev
== NULL
)
3690 if (!strcmp(ad
->model_rev
, model_rev
))
3698 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3700 /* We don't support polling DMA.
3701 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3702 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3704 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3705 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3707 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3711 * ata_dev_xfermask - Compute supported xfermask of the given device
3712 * @dev: Device to compute xfermask for
3714 * Compute supported xfermask of @dev and store it in
3715 * dev->*_mask. This function is responsible for applying all
3716 * known limits including host controller limits, device
3722 static void ata_dev_xfermask(struct ata_device
*dev
)
3724 struct ata_port
*ap
= dev
->ap
;
3725 struct ata_host
*host
= ap
->host
;
3726 unsigned long xfer_mask
;
3728 /* controller modes available */
3729 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3730 ap
->mwdma_mask
, ap
->udma_mask
);
3732 /* drive modes available */
3733 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3734 dev
->mwdma_mask
, dev
->udma_mask
);
3735 xfer_mask
&= ata_id_xfermask(dev
->id
);
3738 * CFA Advanced TrueIDE timings are not allowed on a shared
3741 if (ata_dev_pair(dev
)) {
3742 /* No PIO5 or PIO6 */
3743 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3744 /* No MWDMA3 or MWDMA 4 */
3745 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3748 if (ata_dma_blacklisted(dev
)) {
3749 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3750 ata_dev_printk(dev
, KERN_WARNING
,
3751 "device is on DMA blacklist, disabling DMA\n");
3754 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3755 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3756 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3757 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3758 "other device, disabling DMA\n");
3761 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3762 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3764 if (ap
->ops
->mode_filter
)
3765 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3767 /* Apply cable rule here. Don't apply it early because when
3768 * we handle hot plug the cable type can itself change.
3769 * Check this last so that we know if the transfer rate was
3770 * solely limited by the cable.
3771 * Unknown or 80 wire cables reported host side are checked
3772 * drive side as well. Cases where we know a 40wire cable
3773 * is used safely for 80 are not checked here.
3775 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3776 /* UDMA/44 or higher would be available */
3777 if((ap
->cbl
== ATA_CBL_PATA40
) ||
3778 (ata_drive_40wire(dev
->id
) &&
3779 (ap
->cbl
== ATA_CBL_PATA_UNK
||
3780 ap
->cbl
== ATA_CBL_PATA80
))) {
3781 ata_dev_printk(dev
, KERN_WARNING
,
3782 "limited to UDMA/33 due to 40-wire cable\n");
3783 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3786 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3787 &dev
->mwdma_mask
, &dev
->udma_mask
);
3791 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3792 * @dev: Device to which command will be sent
3794 * Issue SET FEATURES - XFER MODE command to device @dev
3798 * PCI/etc. bus probe sem.
3801 * 0 on success, AC_ERR_* mask otherwise.
3804 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3806 struct ata_taskfile tf
;
3807 unsigned int err_mask
;
3809 /* set up set-features taskfile */
3810 DPRINTK("set features - xfer mode\n");
3812 ata_tf_init(dev
, &tf
);
3813 tf
.command
= ATA_CMD_SET_FEATURES
;
3814 tf
.feature
= SETFEATURES_XFER
;
3815 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3816 tf
.protocol
= ATA_PROT_NODATA
;
3817 tf
.nsect
= dev
->xfer_mode
;
3819 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3821 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3826 * ata_dev_init_params - Issue INIT DEV PARAMS command
3827 * @dev: Device to which command will be sent
3828 * @heads: Number of heads (taskfile parameter)
3829 * @sectors: Number of sectors (taskfile parameter)
3832 * Kernel thread context (may sleep)
3835 * 0 on success, AC_ERR_* mask otherwise.
3837 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3838 u16 heads
, u16 sectors
)
3840 struct ata_taskfile tf
;
3841 unsigned int err_mask
;
3843 /* Number of sectors per track 1-255. Number of heads 1-16 */
3844 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3845 return AC_ERR_INVALID
;
3847 /* set up init dev params taskfile */
3848 DPRINTK("init dev params \n");
3850 ata_tf_init(dev
, &tf
);
3851 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3852 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3853 tf
.protocol
= ATA_PROT_NODATA
;
3855 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3857 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3859 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3864 * ata_sg_clean - Unmap DMA memory associated with command
3865 * @qc: Command containing DMA memory to be released
3867 * Unmap all mapped DMA memory associated with this command.
3870 * spin_lock_irqsave(host lock)
3872 void ata_sg_clean(struct ata_queued_cmd
*qc
)
3874 struct ata_port
*ap
= qc
->ap
;
3875 struct scatterlist
*sg
= qc
->__sg
;
3876 int dir
= qc
->dma_dir
;
3877 void *pad_buf
= NULL
;
3879 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
3880 WARN_ON(sg
== NULL
);
3882 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
3883 WARN_ON(qc
->n_elem
> 1);
3885 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
3887 /* if we padded the buffer out to 32-bit bound, and data
3888 * xfer direction is from-device, we must copy from the
3889 * pad buffer back into the supplied buffer
3891 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
3892 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3894 if (qc
->flags
& ATA_QCFLAG_SG
) {
3896 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
3897 /* restore last sg */
3898 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
3900 struct scatterlist
*psg
= &qc
->pad_sgent
;
3901 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3902 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
3903 kunmap_atomic(addr
, KM_IRQ0
);
3907 dma_unmap_single(ap
->dev
,
3908 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
3911 sg
->length
+= qc
->pad_len
;
3913 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3914 pad_buf
, qc
->pad_len
);
3917 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3922 * ata_fill_sg - Fill PCI IDE PRD table
3923 * @qc: Metadata associated with taskfile to be transferred
3925 * Fill PCI IDE PRD (scatter-gather) table with segments
3926 * associated with the current disk command.
3929 * spin_lock_irqsave(host lock)
3932 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
3934 struct ata_port
*ap
= qc
->ap
;
3935 struct scatterlist
*sg
;
3938 WARN_ON(qc
->__sg
== NULL
);
3939 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
3942 ata_for_each_sg(sg
, qc
) {
3946 /* determine if physical DMA addr spans 64K boundary.
3947 * Note h/w doesn't support 64-bit, so we unconditionally
3948 * truncate dma_addr_t to u32.
3950 addr
= (u32
) sg_dma_address(sg
);
3951 sg_len
= sg_dma_len(sg
);
3954 offset
= addr
& 0xffff;
3956 if ((offset
+ sg_len
) > 0x10000)
3957 len
= 0x10000 - offset
;
3959 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
3960 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
3961 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
3970 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
3973 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3974 * @qc: Metadata associated with taskfile to check
3976 * Allow low-level driver to filter ATA PACKET commands, returning
3977 * a status indicating whether or not it is OK to use DMA for the
3978 * supplied PACKET command.
3981 * spin_lock_irqsave(host lock)
3983 * RETURNS: 0 when ATAPI DMA can be used
3986 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
3988 struct ata_port
*ap
= qc
->ap
;
3989 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3991 /* some drives can only do ATAPI DMA on read/write */
3992 if (unlikely(qc
->dev
->horkage
& ATA_HORKAGE_DMA_RW_ONLY
)) {
3993 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
3994 u8
*scsicmd
= cmd
->cmnd
;
3996 switch (scsicmd
[0]) {
4003 /* atapi dma maybe ok */
4006 /* turn off atapi dma */
4011 if (ap
->ops
->check_atapi_dma
)
4012 rc
= ap
->ops
->check_atapi_dma(qc
);
4017 * ata_qc_prep - Prepare taskfile for submission
4018 * @qc: Metadata associated with taskfile to be prepared
4020 * Prepare ATA taskfile for submission.
4023 * spin_lock_irqsave(host lock)
4025 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4027 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4033 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4036 * ata_sg_init_one - Associate command with memory buffer
4037 * @qc: Command to be associated
4038 * @buf: Memory buffer
4039 * @buflen: Length of memory buffer, in bytes.
4041 * Initialize the data-related elements of queued_cmd @qc
4042 * to point to a single memory buffer, @buf of byte length @buflen.
4045 * spin_lock_irqsave(host lock)
4048 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4050 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4052 qc
->__sg
= &qc
->sgent
;
4054 qc
->orig_n_elem
= 1;
4056 qc
->nbytes
= buflen
;
4058 sg_init_one(&qc
->sgent
, buf
, buflen
);
4062 * ata_sg_init - Associate command with scatter-gather table.
4063 * @qc: Command to be associated
4064 * @sg: Scatter-gather table.
4065 * @n_elem: Number of elements in s/g table.
4067 * Initialize the data-related elements of queued_cmd @qc
4068 * to point to a scatter-gather table @sg, containing @n_elem
4072 * spin_lock_irqsave(host lock)
4075 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4076 unsigned int n_elem
)
4078 qc
->flags
|= ATA_QCFLAG_SG
;
4080 qc
->n_elem
= n_elem
;
4081 qc
->orig_n_elem
= n_elem
;
4085 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4086 * @qc: Command with memory buffer to be mapped.
4088 * DMA-map the memory buffer associated with queued_cmd @qc.
4091 * spin_lock_irqsave(host lock)
4094 * Zero on success, negative on error.
4097 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4099 struct ata_port
*ap
= qc
->ap
;
4100 int dir
= qc
->dma_dir
;
4101 struct scatterlist
*sg
= qc
->__sg
;
4102 dma_addr_t dma_address
;
4105 /* we must lengthen transfers to end on a 32-bit boundary */
4106 qc
->pad_len
= sg
->length
& 3;
4108 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4109 struct scatterlist
*psg
= &qc
->pad_sgent
;
4111 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4113 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4115 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4116 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4119 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4120 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4122 sg
->length
-= qc
->pad_len
;
4123 if (sg
->length
== 0)
4126 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4127 sg
->length
, qc
->pad_len
);
4135 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4137 if (dma_mapping_error(dma_address
)) {
4139 sg
->length
+= qc
->pad_len
;
4143 sg_dma_address(sg
) = dma_address
;
4144 sg_dma_len(sg
) = sg
->length
;
4147 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4148 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4154 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4155 * @qc: Command with scatter-gather table to be mapped.
4157 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4160 * spin_lock_irqsave(host lock)
4163 * Zero on success, negative on error.
4167 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4169 struct ata_port
*ap
= qc
->ap
;
4170 struct scatterlist
*sg
= qc
->__sg
;
4171 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4172 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4174 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4175 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4177 /* we must lengthen transfers to end on a 32-bit boundary */
4178 qc
->pad_len
= lsg
->length
& 3;
4180 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4181 struct scatterlist
*psg
= &qc
->pad_sgent
;
4182 unsigned int offset
;
4184 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4186 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4189 * psg->page/offset are used to copy to-be-written
4190 * data in this function or read data in ata_sg_clean.
4192 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4193 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4194 psg
->offset
= offset_in_page(offset
);
4196 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4197 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4198 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4199 kunmap_atomic(addr
, KM_IRQ0
);
4202 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4203 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4205 lsg
->length
-= qc
->pad_len
;
4206 if (lsg
->length
== 0)
4209 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4210 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4213 pre_n_elem
= qc
->n_elem
;
4214 if (trim_sg
&& pre_n_elem
)
4223 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4225 /* restore last sg */
4226 lsg
->length
+= qc
->pad_len
;
4230 DPRINTK("%d sg elements mapped\n", n_elem
);
4233 qc
->n_elem
= n_elem
;
4239 * swap_buf_le16 - swap halves of 16-bit words in place
4240 * @buf: Buffer to swap
4241 * @buf_words: Number of 16-bit words in buffer.
4243 * Swap halves of 16-bit words if needed to convert from
4244 * little-endian byte order to native cpu byte order, or
4248 * Inherited from caller.
4250 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4255 for (i
= 0; i
< buf_words
; i
++)
4256 buf
[i
] = le16_to_cpu(buf
[i
]);
4257 #endif /* __BIG_ENDIAN */
4261 * ata_data_xfer - Transfer data by PIO
4262 * @adev: device to target
4264 * @buflen: buffer length
4265 * @write_data: read/write
4267 * Transfer data from/to the device data register by PIO.
4270 * Inherited from caller.
4272 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4273 unsigned int buflen
, int write_data
)
4275 struct ata_port
*ap
= adev
->ap
;
4276 unsigned int words
= buflen
>> 1;
4278 /* Transfer multiple of 2 bytes */
4280 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4282 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4284 /* Transfer trailing 1 byte, if any. */
4285 if (unlikely(buflen
& 0x01)) {
4286 u16 align_buf
[1] = { 0 };
4287 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4290 memcpy(align_buf
, trailing_buf
, 1);
4291 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4293 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4294 memcpy(trailing_buf
, align_buf
, 1);
4300 * ata_data_xfer_noirq - Transfer data by PIO
4301 * @adev: device to target
4303 * @buflen: buffer length
4304 * @write_data: read/write
4306 * Transfer data from/to the device data register by PIO. Do the
4307 * transfer with interrupts disabled.
4310 * Inherited from caller.
4312 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4313 unsigned int buflen
, int write_data
)
4315 unsigned long flags
;
4316 local_irq_save(flags
);
4317 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4318 local_irq_restore(flags
);
4323 * ata_pio_sector - Transfer a sector of data.
4324 * @qc: Command on going
4326 * Transfer qc->sect_size bytes of data from/to the ATA device.
4329 * Inherited from caller.
4332 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4334 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4335 struct scatterlist
*sg
= qc
->__sg
;
4336 struct ata_port
*ap
= qc
->ap
;
4338 unsigned int offset
;
4341 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4342 ap
->hsm_task_state
= HSM_ST_LAST
;
4344 page
= sg
[qc
->cursg
].page
;
4345 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4347 /* get the current page and offset */
4348 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4349 offset
%= PAGE_SIZE
;
4351 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4353 if (PageHighMem(page
)) {
4354 unsigned long flags
;
4356 /* FIXME: use a bounce buffer */
4357 local_irq_save(flags
);
4358 buf
= kmap_atomic(page
, KM_IRQ0
);
4360 /* do the actual data transfer */
4361 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4363 kunmap_atomic(buf
, KM_IRQ0
);
4364 local_irq_restore(flags
);
4366 buf
= page_address(page
);
4367 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4370 qc
->curbytes
+= qc
->sect_size
;
4371 qc
->cursg_ofs
+= qc
->sect_size
;
4373 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4380 * ata_pio_sectors - Transfer one or many sectors.
4381 * @qc: Command on going
4383 * Transfer one or many sectors of data from/to the
4384 * ATA device for the DRQ request.
4387 * Inherited from caller.
4390 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4392 if (is_multi_taskfile(&qc
->tf
)) {
4393 /* READ/WRITE MULTIPLE */
4396 WARN_ON(qc
->dev
->multi_count
== 0);
4398 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4399 qc
->dev
->multi_count
);
4407 * atapi_send_cdb - Write CDB bytes to hardware
4408 * @ap: Port to which ATAPI device is attached.
4409 * @qc: Taskfile currently active
4411 * When device has indicated its readiness to accept
4412 * a CDB, this function is called. Send the CDB.
4418 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4421 DPRINTK("send cdb\n");
4422 WARN_ON(qc
->dev
->cdb_len
< 12);
4424 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4425 ata_altstatus(ap
); /* flush */
4427 switch (qc
->tf
.protocol
) {
4428 case ATA_PROT_ATAPI
:
4429 ap
->hsm_task_state
= HSM_ST
;
4431 case ATA_PROT_ATAPI_NODATA
:
4432 ap
->hsm_task_state
= HSM_ST_LAST
;
4434 case ATA_PROT_ATAPI_DMA
:
4435 ap
->hsm_task_state
= HSM_ST_LAST
;
4436 /* initiate bmdma */
4437 ap
->ops
->bmdma_start(qc
);
4443 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4444 * @qc: Command on going
4445 * @bytes: number of bytes
4447 * Transfer Transfer data from/to the ATAPI device.
4450 * Inherited from caller.
4454 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4456 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4457 struct scatterlist
*sg
= qc
->__sg
;
4458 struct ata_port
*ap
= qc
->ap
;
4461 unsigned int offset
, count
;
4463 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4464 ap
->hsm_task_state
= HSM_ST_LAST
;
4467 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4469 * The end of qc->sg is reached and the device expects
4470 * more data to transfer. In order not to overrun qc->sg
4471 * and fulfill length specified in the byte count register,
4472 * - for read case, discard trailing data from the device
4473 * - for write case, padding zero data to the device
4475 u16 pad_buf
[1] = { 0 };
4476 unsigned int words
= bytes
>> 1;
4479 if (words
) /* warning if bytes > 1 */
4480 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4481 "%u bytes trailing data\n", bytes
);
4483 for (i
= 0; i
< words
; i
++)
4484 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4486 ap
->hsm_task_state
= HSM_ST_LAST
;
4490 sg
= &qc
->__sg
[qc
->cursg
];
4493 offset
= sg
->offset
+ qc
->cursg_ofs
;
4495 /* get the current page and offset */
4496 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4497 offset
%= PAGE_SIZE
;
4499 /* don't overrun current sg */
4500 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4502 /* don't cross page boundaries */
4503 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4505 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4507 if (PageHighMem(page
)) {
4508 unsigned long flags
;
4510 /* FIXME: use bounce buffer */
4511 local_irq_save(flags
);
4512 buf
= kmap_atomic(page
, KM_IRQ0
);
4514 /* do the actual data transfer */
4515 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4517 kunmap_atomic(buf
, KM_IRQ0
);
4518 local_irq_restore(flags
);
4520 buf
= page_address(page
);
4521 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4525 qc
->curbytes
+= count
;
4526 qc
->cursg_ofs
+= count
;
4528 if (qc
->cursg_ofs
== sg
->length
) {
4538 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4539 * @qc: Command on going
4541 * Transfer Transfer data from/to the ATAPI device.
4544 * Inherited from caller.
4547 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4549 struct ata_port
*ap
= qc
->ap
;
4550 struct ata_device
*dev
= qc
->dev
;
4551 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4552 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4554 /* Abuse qc->result_tf for temp storage of intermediate TF
4555 * here to save some kernel stack usage.
4556 * For normal completion, qc->result_tf is not relevant. For
4557 * error, qc->result_tf is later overwritten by ata_qc_complete().
4558 * So, the correctness of qc->result_tf is not affected.
4560 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4561 ireason
= qc
->result_tf
.nsect
;
4562 bc_lo
= qc
->result_tf
.lbam
;
4563 bc_hi
= qc
->result_tf
.lbah
;
4564 bytes
= (bc_hi
<< 8) | bc_lo
;
4566 /* shall be cleared to zero, indicating xfer of data */
4567 if (ireason
& (1 << 0))
4570 /* make sure transfer direction matches expected */
4571 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4572 if (do_write
!= i_write
)
4575 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4577 __atapi_pio_bytes(qc
, bytes
);
4582 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4583 qc
->err_mask
|= AC_ERR_HSM
;
4584 ap
->hsm_task_state
= HSM_ST_ERR
;
4588 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4589 * @ap: the target ata_port
4593 * 1 if ok in workqueue, 0 otherwise.
4596 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4598 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4601 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4602 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4603 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4606 if (is_atapi_taskfile(&qc
->tf
) &&
4607 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4615 * ata_hsm_qc_complete - finish a qc running on standard HSM
4616 * @qc: Command to complete
4617 * @in_wq: 1 if called from workqueue, 0 otherwise
4619 * Finish @qc which is running on standard HSM.
4622 * If @in_wq is zero, spin_lock_irqsave(host lock).
4623 * Otherwise, none on entry and grabs host lock.
4625 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4627 struct ata_port
*ap
= qc
->ap
;
4628 unsigned long flags
;
4630 if (ap
->ops
->error_handler
) {
4632 spin_lock_irqsave(ap
->lock
, flags
);
4634 /* EH might have kicked in while host lock is
4637 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4639 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4640 ap
->ops
->irq_on(ap
);
4641 ata_qc_complete(qc
);
4643 ata_port_freeze(ap
);
4646 spin_unlock_irqrestore(ap
->lock
, flags
);
4648 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4649 ata_qc_complete(qc
);
4651 ata_port_freeze(ap
);
4655 spin_lock_irqsave(ap
->lock
, flags
);
4656 ap
->ops
->irq_on(ap
);
4657 ata_qc_complete(qc
);
4658 spin_unlock_irqrestore(ap
->lock
, flags
);
4660 ata_qc_complete(qc
);
4663 ata_altstatus(ap
); /* flush */
4667 * ata_hsm_move - move the HSM to the next state.
4668 * @ap: the target ata_port
4670 * @status: current device status
4671 * @in_wq: 1 if called from workqueue, 0 otherwise
4674 * 1 when poll next status needed, 0 otherwise.
4676 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4677 u8 status
, int in_wq
)
4679 unsigned long flags
= 0;
4682 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4684 /* Make sure ata_qc_issue_prot() does not throw things
4685 * like DMA polling into the workqueue. Notice that
4686 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4688 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4691 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4692 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4694 switch (ap
->hsm_task_state
) {
4696 /* Send first data block or PACKET CDB */
4698 /* If polling, we will stay in the work queue after
4699 * sending the data. Otherwise, interrupt handler
4700 * takes over after sending the data.
4702 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4704 /* check device status */
4705 if (unlikely((status
& ATA_DRQ
) == 0)) {
4706 /* handle BSY=0, DRQ=0 as error */
4707 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4708 /* device stops HSM for abort/error */
4709 qc
->err_mask
|= AC_ERR_DEV
;
4711 /* HSM violation. Let EH handle this */
4712 qc
->err_mask
|= AC_ERR_HSM
;
4714 ap
->hsm_task_state
= HSM_ST_ERR
;
4718 /* Device should not ask for data transfer (DRQ=1)
4719 * when it finds something wrong.
4720 * We ignore DRQ here and stop the HSM by
4721 * changing hsm_task_state to HSM_ST_ERR and
4722 * let the EH abort the command or reset the device.
4724 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4725 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4726 "error, dev_stat 0x%X\n", status
);
4727 qc
->err_mask
|= AC_ERR_HSM
;
4728 ap
->hsm_task_state
= HSM_ST_ERR
;
4732 /* Send the CDB (atapi) or the first data block (ata pio out).
4733 * During the state transition, interrupt handler shouldn't
4734 * be invoked before the data transfer is complete and
4735 * hsm_task_state is changed. Hence, the following locking.
4738 spin_lock_irqsave(ap
->lock
, flags
);
4740 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4741 /* PIO data out protocol.
4742 * send first data block.
4745 /* ata_pio_sectors() might change the state
4746 * to HSM_ST_LAST. so, the state is changed here
4747 * before ata_pio_sectors().
4749 ap
->hsm_task_state
= HSM_ST
;
4750 ata_pio_sectors(qc
);
4751 ata_altstatus(ap
); /* flush */
4754 atapi_send_cdb(ap
, qc
);
4757 spin_unlock_irqrestore(ap
->lock
, flags
);
4759 /* if polling, ata_pio_task() handles the rest.
4760 * otherwise, interrupt handler takes over from here.
4765 /* complete command or read/write the data register */
4766 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4767 /* ATAPI PIO protocol */
4768 if ((status
& ATA_DRQ
) == 0) {
4769 /* No more data to transfer or device error.
4770 * Device error will be tagged in HSM_ST_LAST.
4772 ap
->hsm_task_state
= HSM_ST_LAST
;
4776 /* Device should not ask for data transfer (DRQ=1)
4777 * when it finds something wrong.
4778 * We ignore DRQ here and stop the HSM by
4779 * changing hsm_task_state to HSM_ST_ERR and
4780 * let the EH abort the command or reset the device.
4782 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4783 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
4784 "device error, dev_stat 0x%X\n",
4786 qc
->err_mask
|= AC_ERR_HSM
;
4787 ap
->hsm_task_state
= HSM_ST_ERR
;
4791 atapi_pio_bytes(qc
);
4793 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4794 /* bad ireason reported by device */
4798 /* ATA PIO protocol */
4799 if (unlikely((status
& ATA_DRQ
) == 0)) {
4800 /* handle BSY=0, DRQ=0 as error */
4801 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4802 /* device stops HSM for abort/error */
4803 qc
->err_mask
|= AC_ERR_DEV
;
4805 /* HSM violation. Let EH handle this.
4806 * Phantom devices also trigger this
4807 * condition. Mark hint.
4809 qc
->err_mask
|= AC_ERR_HSM
|
4812 ap
->hsm_task_state
= HSM_ST_ERR
;
4816 /* For PIO reads, some devices may ask for
4817 * data transfer (DRQ=1) alone with ERR=1.
4818 * We respect DRQ here and transfer one
4819 * block of junk data before changing the
4820 * hsm_task_state to HSM_ST_ERR.
4822 * For PIO writes, ERR=1 DRQ=1 doesn't make
4823 * sense since the data block has been
4824 * transferred to the device.
4826 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4827 /* data might be corrputed */
4828 qc
->err_mask
|= AC_ERR_DEV
;
4830 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4831 ata_pio_sectors(qc
);
4833 status
= ata_wait_idle(ap
);
4836 if (status
& (ATA_BUSY
| ATA_DRQ
))
4837 qc
->err_mask
|= AC_ERR_HSM
;
4839 /* ata_pio_sectors() might change the
4840 * state to HSM_ST_LAST. so, the state
4841 * is changed after ata_pio_sectors().
4843 ap
->hsm_task_state
= HSM_ST_ERR
;
4847 ata_pio_sectors(qc
);
4849 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4850 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4853 status
= ata_wait_idle(ap
);
4858 ata_altstatus(ap
); /* flush */
4863 if (unlikely(!ata_ok(status
))) {
4864 qc
->err_mask
|= __ac_err_mask(status
);
4865 ap
->hsm_task_state
= HSM_ST_ERR
;
4869 /* no more data to transfer */
4870 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4871 ap
->print_id
, qc
->dev
->devno
, status
);
4873 WARN_ON(qc
->err_mask
);
4875 ap
->hsm_task_state
= HSM_ST_IDLE
;
4877 /* complete taskfile transaction */
4878 ata_hsm_qc_complete(qc
, in_wq
);
4884 /* make sure qc->err_mask is available to
4885 * know what's wrong and recover
4887 WARN_ON(qc
->err_mask
== 0);
4889 ap
->hsm_task_state
= HSM_ST_IDLE
;
4891 /* complete taskfile transaction */
4892 ata_hsm_qc_complete(qc
, in_wq
);
4904 static void ata_pio_task(struct work_struct
*work
)
4906 struct ata_port
*ap
=
4907 container_of(work
, struct ata_port
, port_task
.work
);
4908 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
4913 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
4916 * This is purely heuristic. This is a fast path.
4917 * Sometimes when we enter, BSY will be cleared in
4918 * a chk-status or two. If not, the drive is probably seeking
4919 * or something. Snooze for a couple msecs, then
4920 * chk-status again. If still busy, queue delayed work.
4922 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
4923 if (status
& ATA_BUSY
) {
4925 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
4926 if (status
& ATA_BUSY
) {
4927 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
4933 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
4935 /* another command or interrupt handler
4936 * may be running at this point.
4943 * ata_qc_new - Request an available ATA command, for queueing
4944 * @ap: Port associated with device @dev
4945 * @dev: Device from whom we request an available command structure
4951 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4953 struct ata_queued_cmd
*qc
= NULL
;
4956 /* no command while frozen */
4957 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4960 /* the last tag is reserved for internal command. */
4961 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4962 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4963 qc
= __ata_qc_from_tag(ap
, i
);
4974 * ata_qc_new_init - Request an available ATA command, and initialize it
4975 * @dev: Device from whom we request an available command structure
4981 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4983 struct ata_port
*ap
= dev
->ap
;
4984 struct ata_queued_cmd
*qc
;
4986 qc
= ata_qc_new(ap
);
4999 * ata_qc_free - free unused ata_queued_cmd
5000 * @qc: Command to complete
5002 * Designed to free unused ata_queued_cmd object
5003 * in case something prevents using it.
5006 * spin_lock_irqsave(host lock)
5008 void ata_qc_free(struct ata_queued_cmd
*qc
)
5010 struct ata_port
*ap
= qc
->ap
;
5013 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5017 if (likely(ata_tag_valid(tag
))) {
5018 qc
->tag
= ATA_TAG_POISON
;
5019 clear_bit(tag
, &ap
->qc_allocated
);
5023 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5025 struct ata_port
*ap
= qc
->ap
;
5027 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5028 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5030 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5033 /* command should be marked inactive atomically with qc completion */
5034 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
5035 ap
->sactive
&= ~(1 << qc
->tag
);
5037 ap
->active_tag
= ATA_TAG_POISON
;
5039 /* atapi: mark qc as inactive to prevent the interrupt handler
5040 * from completing the command twice later, before the error handler
5041 * is called. (when rc != 0 and atapi request sense is needed)
5043 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5044 ap
->qc_active
&= ~(1 << qc
->tag
);
5046 /* call completion callback */
5047 qc
->complete_fn(qc
);
5050 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5052 struct ata_port
*ap
= qc
->ap
;
5054 qc
->result_tf
.flags
= qc
->tf
.flags
;
5055 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5059 * ata_qc_complete - Complete an active ATA command
5060 * @qc: Command to complete
5061 * @err_mask: ATA Status register contents
5063 * Indicate to the mid and upper layers that an ATA
5064 * command has completed, with either an ok or not-ok status.
5067 * spin_lock_irqsave(host lock)
5069 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5071 struct ata_port
*ap
= qc
->ap
;
5073 /* XXX: New EH and old EH use different mechanisms to
5074 * synchronize EH with regular execution path.
5076 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5077 * Normal execution path is responsible for not accessing a
5078 * failed qc. libata core enforces the rule by returning NULL
5079 * from ata_qc_from_tag() for failed qcs.
5081 * Old EH depends on ata_qc_complete() nullifying completion
5082 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5083 * not synchronize with interrupt handler. Only PIO task is
5086 if (ap
->ops
->error_handler
) {
5087 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5089 if (unlikely(qc
->err_mask
))
5090 qc
->flags
|= ATA_QCFLAG_FAILED
;
5092 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5093 if (!ata_tag_internal(qc
->tag
)) {
5094 /* always fill result TF for failed qc */
5096 ata_qc_schedule_eh(qc
);
5101 /* read result TF if requested */
5102 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5105 __ata_qc_complete(qc
);
5107 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5110 /* read result TF if failed or requested */
5111 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5114 __ata_qc_complete(qc
);
5119 * ata_qc_complete_multiple - Complete multiple qcs successfully
5120 * @ap: port in question
5121 * @qc_active: new qc_active mask
5122 * @finish_qc: LLDD callback invoked before completing a qc
5124 * Complete in-flight commands. This functions is meant to be
5125 * called from low-level driver's interrupt routine to complete
5126 * requests normally. ap->qc_active and @qc_active is compared
5127 * and commands are completed accordingly.
5130 * spin_lock_irqsave(host lock)
5133 * Number of completed commands on success, -errno otherwise.
5135 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5136 void (*finish_qc
)(struct ata_queued_cmd
*))
5142 done_mask
= ap
->qc_active
^ qc_active
;
5144 if (unlikely(done_mask
& qc_active
)) {
5145 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5146 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5150 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5151 struct ata_queued_cmd
*qc
;
5153 if (!(done_mask
& (1 << i
)))
5156 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5159 ata_qc_complete(qc
);
5167 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5169 struct ata_port
*ap
= qc
->ap
;
5171 switch (qc
->tf
.protocol
) {
5174 case ATA_PROT_ATAPI_DMA
:
5177 case ATA_PROT_ATAPI
:
5179 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5192 * ata_qc_issue - issue taskfile to device
5193 * @qc: command to issue to device
5195 * Prepare an ATA command to submission to device.
5196 * This includes mapping the data into a DMA-able
5197 * area, filling in the S/G table, and finally
5198 * writing the taskfile to hardware, starting the command.
5201 * spin_lock_irqsave(host lock)
5203 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5205 struct ata_port
*ap
= qc
->ap
;
5207 /* Make sure only one non-NCQ command is outstanding. The
5208 * check is skipped for old EH because it reuses active qc to
5209 * request ATAPI sense.
5211 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
5213 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5214 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
5215 ap
->sactive
|= 1 << qc
->tag
;
5217 WARN_ON(ap
->sactive
);
5218 ap
->active_tag
= qc
->tag
;
5221 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5222 ap
->qc_active
|= 1 << qc
->tag
;
5224 if (ata_should_dma_map(qc
)) {
5225 if (qc
->flags
& ATA_QCFLAG_SG
) {
5226 if (ata_sg_setup(qc
))
5228 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5229 if (ata_sg_setup_one(qc
))
5233 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5236 ap
->ops
->qc_prep(qc
);
5238 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5239 if (unlikely(qc
->err_mask
))
5244 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5245 qc
->err_mask
|= AC_ERR_SYSTEM
;
5247 ata_qc_complete(qc
);
5251 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5252 * @qc: command to issue to device
5254 * Using various libata functions and hooks, this function
5255 * starts an ATA command. ATA commands are grouped into
5256 * classes called "protocols", and issuing each type of protocol
5257 * is slightly different.
5259 * May be used as the qc_issue() entry in ata_port_operations.
5262 * spin_lock_irqsave(host lock)
5265 * Zero on success, AC_ERR_* mask on failure
5268 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5270 struct ata_port
*ap
= qc
->ap
;
5272 /* Use polling pio if the LLD doesn't handle
5273 * interrupt driven pio and atapi CDB interrupt.
5275 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5276 switch (qc
->tf
.protocol
) {
5278 case ATA_PROT_NODATA
:
5279 case ATA_PROT_ATAPI
:
5280 case ATA_PROT_ATAPI_NODATA
:
5281 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5283 case ATA_PROT_ATAPI_DMA
:
5284 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5285 /* see ata_dma_blacklisted() */
5293 /* Some controllers show flaky interrupt behavior after
5294 * setting xfer mode. Use polling instead.
5296 if (unlikely(qc
->tf
.command
== ATA_CMD_SET_FEATURES
&&
5297 qc
->tf
.feature
== SETFEATURES_XFER
) &&
5298 (ap
->flags
& ATA_FLAG_SETXFER_POLLING
))
5299 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5301 /* select the device */
5302 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5304 /* start the command */
5305 switch (qc
->tf
.protocol
) {
5306 case ATA_PROT_NODATA
:
5307 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5308 ata_qc_set_polling(qc
);
5310 ata_tf_to_host(ap
, &qc
->tf
);
5311 ap
->hsm_task_state
= HSM_ST_LAST
;
5313 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5314 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5319 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5321 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5322 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5323 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5324 ap
->hsm_task_state
= HSM_ST_LAST
;
5328 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5329 ata_qc_set_polling(qc
);
5331 ata_tf_to_host(ap
, &qc
->tf
);
5333 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5334 /* PIO data out protocol */
5335 ap
->hsm_task_state
= HSM_ST_FIRST
;
5336 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5338 /* always send first data block using
5339 * the ata_pio_task() codepath.
5342 /* PIO data in protocol */
5343 ap
->hsm_task_state
= HSM_ST
;
5345 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5346 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5348 /* if polling, ata_pio_task() handles the rest.
5349 * otherwise, interrupt handler takes over from here.
5355 case ATA_PROT_ATAPI
:
5356 case ATA_PROT_ATAPI_NODATA
:
5357 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5358 ata_qc_set_polling(qc
);
5360 ata_tf_to_host(ap
, &qc
->tf
);
5362 ap
->hsm_task_state
= HSM_ST_FIRST
;
5364 /* send cdb by polling if no cdb interrupt */
5365 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5366 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5367 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5370 case ATA_PROT_ATAPI_DMA
:
5371 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5373 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5374 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5375 ap
->hsm_task_state
= HSM_ST_FIRST
;
5377 /* send cdb by polling if no cdb interrupt */
5378 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5379 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5384 return AC_ERR_SYSTEM
;
5391 * ata_host_intr - Handle host interrupt for given (port, task)
5392 * @ap: Port on which interrupt arrived (possibly...)
5393 * @qc: Taskfile currently active in engine
5395 * Handle host interrupt for given queued command. Currently,
5396 * only DMA interrupts are handled. All other commands are
5397 * handled via polling with interrupts disabled (nIEN bit).
5400 * spin_lock_irqsave(host lock)
5403 * One if interrupt was handled, zero if not (shared irq).
5406 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5407 struct ata_queued_cmd
*qc
)
5409 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5410 u8 status
, host_stat
= 0;
5412 VPRINTK("ata%u: protocol %d task_state %d\n",
5413 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5415 /* Check whether we are expecting interrupt in this state */
5416 switch (ap
->hsm_task_state
) {
5418 /* Some pre-ATAPI-4 devices assert INTRQ
5419 * at this state when ready to receive CDB.
5422 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5423 * The flag was turned on only for atapi devices.
5424 * No need to check is_atapi_taskfile(&qc->tf) again.
5426 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5430 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5431 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5432 /* check status of DMA engine */
5433 host_stat
= ap
->ops
->bmdma_status(ap
);
5434 VPRINTK("ata%u: host_stat 0x%X\n",
5435 ap
->print_id
, host_stat
);
5437 /* if it's not our irq... */
5438 if (!(host_stat
& ATA_DMA_INTR
))
5441 /* before we do anything else, clear DMA-Start bit */
5442 ap
->ops
->bmdma_stop(qc
);
5444 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5445 /* error when transfering data to/from memory */
5446 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5447 ap
->hsm_task_state
= HSM_ST_ERR
;
5457 /* check altstatus */
5458 status
= ata_altstatus(ap
);
5459 if (status
& ATA_BUSY
)
5462 /* check main status, clearing INTRQ */
5463 status
= ata_chk_status(ap
);
5464 if (unlikely(status
& ATA_BUSY
))
5467 /* ack bmdma irq events */
5468 ap
->ops
->irq_clear(ap
);
5470 ata_hsm_move(ap
, qc
, status
, 0);
5472 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5473 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5474 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5476 return 1; /* irq handled */
5479 ap
->stats
.idle_irq
++;
5482 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5483 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5484 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5488 return 0; /* irq not handled */
5492 * ata_interrupt - Default ATA host interrupt handler
5493 * @irq: irq line (unused)
5494 * @dev_instance: pointer to our ata_host information structure
5496 * Default interrupt handler for PCI IDE devices. Calls
5497 * ata_host_intr() for each port that is not disabled.
5500 * Obtains host lock during operation.
5503 * IRQ_NONE or IRQ_HANDLED.
5506 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5508 struct ata_host
*host
= dev_instance
;
5510 unsigned int handled
= 0;
5511 unsigned long flags
;
5513 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5514 spin_lock_irqsave(&host
->lock
, flags
);
5516 for (i
= 0; i
< host
->n_ports
; i
++) {
5517 struct ata_port
*ap
;
5519 ap
= host
->ports
[i
];
5521 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5522 struct ata_queued_cmd
*qc
;
5524 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5525 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5526 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5527 handled
|= ata_host_intr(ap
, qc
);
5531 spin_unlock_irqrestore(&host
->lock
, flags
);
5533 return IRQ_RETVAL(handled
);
5537 * sata_scr_valid - test whether SCRs are accessible
5538 * @ap: ATA port to test SCR accessibility for
5540 * Test whether SCRs are accessible for @ap.
5546 * 1 if SCRs are accessible, 0 otherwise.
5548 int sata_scr_valid(struct ata_port
*ap
)
5550 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5554 * sata_scr_read - read SCR register of the specified port
5555 * @ap: ATA port to read SCR for
5557 * @val: Place to store read value
5559 * Read SCR register @reg of @ap into *@val. This function is
5560 * guaranteed to succeed if the cable type of the port is SATA
5561 * and the port implements ->scr_read.
5567 * 0 on success, negative errno on failure.
5569 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5571 if (sata_scr_valid(ap
)) {
5572 *val
= ap
->ops
->scr_read(ap
, reg
);
5579 * sata_scr_write - write SCR register of the specified port
5580 * @ap: ATA port to write SCR for
5581 * @reg: SCR to write
5582 * @val: value to write
5584 * Write @val to SCR register @reg of @ap. This function is
5585 * guaranteed to succeed if the cable type of the port is SATA
5586 * and the port implements ->scr_read.
5592 * 0 on success, negative errno on failure.
5594 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5596 if (sata_scr_valid(ap
)) {
5597 ap
->ops
->scr_write(ap
, reg
, val
);
5604 * sata_scr_write_flush - write SCR register of the specified port and flush
5605 * @ap: ATA port to write SCR for
5606 * @reg: SCR to write
5607 * @val: value to write
5609 * This function is identical to sata_scr_write() except that this
5610 * function performs flush after writing to the register.
5616 * 0 on success, negative errno on failure.
5618 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5620 if (sata_scr_valid(ap
)) {
5621 ap
->ops
->scr_write(ap
, reg
, val
);
5622 ap
->ops
->scr_read(ap
, reg
);
5629 * ata_port_online - test whether the given port is online
5630 * @ap: ATA port to test
5632 * Test whether @ap is online. Note that this function returns 0
5633 * if online status of @ap cannot be obtained, so
5634 * ata_port_online(ap) != !ata_port_offline(ap).
5640 * 1 if the port online status is available and online.
5642 int ata_port_online(struct ata_port
*ap
)
5646 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5652 * ata_port_offline - test whether the given port is offline
5653 * @ap: ATA port to test
5655 * Test whether @ap is offline. Note that this function returns
5656 * 0 if offline status of @ap cannot be obtained, so
5657 * ata_port_online(ap) != !ata_port_offline(ap).
5663 * 1 if the port offline status is available and offline.
5665 int ata_port_offline(struct ata_port
*ap
)
5669 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5674 int ata_flush_cache(struct ata_device
*dev
)
5676 unsigned int err_mask
;
5679 if (!ata_try_flush_cache(dev
))
5682 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5683 cmd
= ATA_CMD_FLUSH_EXT
;
5685 cmd
= ATA_CMD_FLUSH
;
5687 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5689 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5697 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5698 unsigned int action
, unsigned int ehi_flags
,
5701 unsigned long flags
;
5704 for (i
= 0; i
< host
->n_ports
; i
++) {
5705 struct ata_port
*ap
= host
->ports
[i
];
5707 /* Previous resume operation might still be in
5708 * progress. Wait for PM_PENDING to clear.
5710 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5711 ata_port_wait_eh(ap
);
5712 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5715 /* request PM ops to EH */
5716 spin_lock_irqsave(ap
->lock
, flags
);
5721 ap
->pm_result
= &rc
;
5724 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5725 ap
->eh_info
.action
|= action
;
5726 ap
->eh_info
.flags
|= ehi_flags
;
5728 ata_port_schedule_eh(ap
);
5730 spin_unlock_irqrestore(ap
->lock
, flags
);
5732 /* wait and check result */
5734 ata_port_wait_eh(ap
);
5735 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5745 * ata_host_suspend - suspend host
5746 * @host: host to suspend
5749 * Suspend @host. Actual operation is performed by EH. This
5750 * function requests EH to perform PM operations and waits for EH
5754 * Kernel thread context (may sleep).
5757 * 0 on success, -errno on failure.
5759 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5763 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5767 /* EH is quiescent now. Fail if we have any ready device.
5768 * This happens if hotplug occurs between completion of device
5769 * suspension and here.
5771 for (i
= 0; i
< host
->n_ports
; i
++) {
5772 struct ata_port
*ap
= host
->ports
[i
];
5774 for (j
= 0; j
< ATA_MAX_DEVICES
; j
++) {
5775 struct ata_device
*dev
= &ap
->device
[j
];
5777 if (ata_dev_ready(dev
)) {
5778 ata_port_printk(ap
, KERN_WARNING
,
5779 "suspend failed, device %d "
5780 "still active\n", dev
->devno
);
5787 host
->dev
->power
.power_state
= mesg
;
5791 ata_host_resume(host
);
5796 * ata_host_resume - resume host
5797 * @host: host to resume
5799 * Resume @host. Actual operation is performed by EH. This
5800 * function requests EH to perform PM operations and returns.
5801 * Note that all resume operations are performed parallely.
5804 * Kernel thread context (may sleep).
5806 void ata_host_resume(struct ata_host
*host
)
5808 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5809 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5810 host
->dev
->power
.power_state
= PMSG_ON
;
5815 * ata_port_start - Set port up for dma.
5816 * @ap: Port to initialize
5818 * Called just after data structures for each port are
5819 * initialized. Allocates space for PRD table.
5821 * May be used as the port_start() entry in ata_port_operations.
5824 * Inherited from caller.
5826 int ata_port_start(struct ata_port
*ap
)
5828 struct device
*dev
= ap
->dev
;
5831 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5836 rc
= ata_pad_alloc(ap
, dev
);
5840 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5841 (unsigned long long)ap
->prd_dma
);
5846 * ata_dev_init - Initialize an ata_device structure
5847 * @dev: Device structure to initialize
5849 * Initialize @dev in preparation for probing.
5852 * Inherited from caller.
5854 void ata_dev_init(struct ata_device
*dev
)
5856 struct ata_port
*ap
= dev
->ap
;
5857 unsigned long flags
;
5859 /* SATA spd limit is bound to the first device */
5860 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5862 /* High bits of dev->flags are used to record warm plug
5863 * requests which occur asynchronously. Synchronize using
5866 spin_lock_irqsave(ap
->lock
, flags
);
5867 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5868 spin_unlock_irqrestore(ap
->lock
, flags
);
5870 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5871 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5872 dev
->pio_mask
= UINT_MAX
;
5873 dev
->mwdma_mask
= UINT_MAX
;
5874 dev
->udma_mask
= UINT_MAX
;
5878 * ata_port_alloc - allocate and initialize basic ATA port resources
5879 * @host: ATA host this allocated port belongs to
5881 * Allocate and initialize basic ATA port resources.
5884 * Allocate ATA port on success, NULL on failure.
5887 * Inherited from calling layer (may sleep).
5889 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5891 struct ata_port
*ap
;
5896 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5900 ap
->lock
= &host
->lock
;
5901 ap
->flags
= ATA_FLAG_DISABLED
;
5903 ap
->ctl
= ATA_DEVCTL_OBS
;
5905 ap
->dev
= host
->dev
;
5907 ap
->hw_sata_spd_limit
= UINT_MAX
;
5908 ap
->active_tag
= ATA_TAG_POISON
;
5909 ap
->last_ctl
= 0xFF;
5911 #if defined(ATA_VERBOSE_DEBUG)
5912 /* turn on all debugging levels */
5913 ap
->msg_enable
= 0x00FF;
5914 #elif defined(ATA_DEBUG)
5915 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5917 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5920 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5921 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5922 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5923 INIT_LIST_HEAD(&ap
->eh_done_q
);
5924 init_waitqueue_head(&ap
->eh_wait_q
);
5926 ap
->cbl
= ATA_CBL_NONE
;
5928 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5929 struct ata_device
*dev
= &ap
->device
[i
];
5936 ap
->stats
.unhandled_irq
= 1;
5937 ap
->stats
.idle_irq
= 1;
5942 static void ata_host_release(struct device
*gendev
, void *res
)
5944 struct ata_host
*host
= dev_get_drvdata(gendev
);
5947 for (i
= 0; i
< host
->n_ports
; i
++) {
5948 struct ata_port
*ap
= host
->ports
[i
];
5953 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
5954 ap
->ops
->port_stop(ap
);
5957 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
5958 host
->ops
->host_stop(host
);
5960 for (i
= 0; i
< host
->n_ports
; i
++) {
5961 struct ata_port
*ap
= host
->ports
[i
];
5967 scsi_host_put(ap
->scsi_host
);
5970 host
->ports
[i
] = NULL
;
5973 dev_set_drvdata(gendev
, NULL
);
5977 * ata_host_alloc - allocate and init basic ATA host resources
5978 * @dev: generic device this host is associated with
5979 * @max_ports: maximum number of ATA ports associated with this host
5981 * Allocate and initialize basic ATA host resources. LLD calls
5982 * this function to allocate a host, initializes it fully and
5983 * attaches it using ata_host_register().
5985 * @max_ports ports are allocated and host->n_ports is
5986 * initialized to @max_ports. The caller is allowed to decrease
5987 * host->n_ports before calling ata_host_register(). The unused
5988 * ports will be automatically freed on registration.
5991 * Allocate ATA host on success, NULL on failure.
5994 * Inherited from calling layer (may sleep).
5996 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5998 struct ata_host
*host
;
6004 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6007 /* alloc a container for our list of ATA ports (buses) */
6008 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6009 /* alloc a container for our list of ATA ports (buses) */
6010 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6014 devres_add(dev
, host
);
6015 dev_set_drvdata(dev
, host
);
6017 spin_lock_init(&host
->lock
);
6019 host
->n_ports
= max_ports
;
6021 /* allocate ports bound to this host */
6022 for (i
= 0; i
< max_ports
; i
++) {
6023 struct ata_port
*ap
;
6025 ap
= ata_port_alloc(host
);
6030 host
->ports
[i
] = ap
;
6033 devres_remove_group(dev
, NULL
);
6037 devres_release_group(dev
, NULL
);
6042 * ata_host_alloc_pinfo - alloc host and init with port_info array
6043 * @dev: generic device this host is associated with
6044 * @ppi: array of ATA port_info to initialize host with
6045 * @n_ports: number of ATA ports attached to this host
6047 * Allocate ATA host and initialize with info from @ppi. If NULL
6048 * terminated, @ppi may contain fewer entries than @n_ports. The
6049 * last entry will be used for the remaining ports.
6052 * Allocate ATA host on success, NULL on failure.
6055 * Inherited from calling layer (may sleep).
6057 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6058 const struct ata_port_info
* const * ppi
,
6061 const struct ata_port_info
*pi
;
6062 struct ata_host
*host
;
6065 host
= ata_host_alloc(dev
, n_ports
);
6069 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6070 struct ata_port
*ap
= host
->ports
[i
];
6075 ap
->pio_mask
= pi
->pio_mask
;
6076 ap
->mwdma_mask
= pi
->mwdma_mask
;
6077 ap
->udma_mask
= pi
->udma_mask
;
6078 ap
->flags
|= pi
->flags
;
6079 ap
->ops
= pi
->port_ops
;
6081 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6082 host
->ops
= pi
->port_ops
;
6083 if (!host
->private_data
&& pi
->private_data
)
6084 host
->private_data
= pi
->private_data
;
6091 * ata_host_start - start and freeze ports of an ATA host
6092 * @host: ATA host to start ports for
6094 * Start and then freeze ports of @host. Started status is
6095 * recorded in host->flags, so this function can be called
6096 * multiple times. Ports are guaranteed to get started only
6097 * once. If host->ops isn't initialized yet, its set to the
6098 * first non-dummy port ops.
6101 * Inherited from calling layer (may sleep).
6104 * 0 if all ports are started successfully, -errno otherwise.
6106 int ata_host_start(struct ata_host
*host
)
6110 if (host
->flags
& ATA_HOST_STARTED
)
6113 for (i
= 0; i
< host
->n_ports
; i
++) {
6114 struct ata_port
*ap
= host
->ports
[i
];
6116 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6117 host
->ops
= ap
->ops
;
6119 if (ap
->ops
->port_start
) {
6120 rc
= ap
->ops
->port_start(ap
);
6122 ata_port_printk(ap
, KERN_ERR
, "failed to "
6123 "start port (errno=%d)\n", rc
);
6128 ata_eh_freeze_port(ap
);
6131 host
->flags
|= ATA_HOST_STARTED
;
6136 struct ata_port
*ap
= host
->ports
[i
];
6138 if (ap
->ops
->port_stop
)
6139 ap
->ops
->port_stop(ap
);
6145 * ata_sas_host_init - Initialize a host struct
6146 * @host: host to initialize
6147 * @dev: device host is attached to
6148 * @flags: host flags
6152 * PCI/etc. bus probe sem.
6155 /* KILLME - the only user left is ipr */
6156 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6157 unsigned long flags
, const struct ata_port_operations
*ops
)
6159 spin_lock_init(&host
->lock
);
6161 host
->flags
= flags
;
6166 * ata_host_register - register initialized ATA host
6167 * @host: ATA host to register
6168 * @sht: template for SCSI host
6170 * Register initialized ATA host. @host is allocated using
6171 * ata_host_alloc() and fully initialized by LLD. This function
6172 * starts ports, registers @host with ATA and SCSI layers and
6173 * probe registered devices.
6176 * Inherited from calling layer (may sleep).
6179 * 0 on success, -errno otherwise.
6181 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6185 /* host must have been started */
6186 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6187 dev_printk(KERN_ERR
, host
->dev
,
6188 "BUG: trying to register unstarted host\n");
6193 /* Blow away unused ports. This happens when LLD can't
6194 * determine the exact number of ports to allocate at
6197 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6198 kfree(host
->ports
[i
]);
6200 /* give ports names and add SCSI hosts */
6201 for (i
= 0; i
< host
->n_ports
; i
++)
6202 host
->ports
[i
]->print_id
= ata_print_id
++;
6204 rc
= ata_scsi_add_hosts(host
, sht
);
6208 /* set cable, sata_spd_limit and report */
6209 for (i
= 0; i
< host
->n_ports
; i
++) {
6210 struct ata_port
*ap
= host
->ports
[i
];
6213 unsigned long xfer_mask
;
6215 /* set SATA cable type if still unset */
6216 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6217 ap
->cbl
= ATA_CBL_SATA
;
6219 /* init sata_spd_limit to the current value */
6220 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
6221 int spd
= (scontrol
>> 4) & 0xf;
6222 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6224 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
6226 /* report the secondary IRQ for second channel legacy */
6227 irq_line
= host
->irq
;
6228 if (i
== 1 && host
->irq2
)
6229 irq_line
= host
->irq2
;
6231 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6234 /* print per-port info to dmesg */
6235 if (!ata_port_is_dummy(ap
))
6236 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
6237 "ctl 0x%p bmdma 0x%p irq %d\n",
6238 ap
->cbl
== ATA_CBL_SATA
? 'S' : 'P',
6239 ata_mode_string(xfer_mask
),
6240 ap
->ioaddr
.cmd_addr
,
6241 ap
->ioaddr
.ctl_addr
,
6242 ap
->ioaddr
.bmdma_addr
,
6245 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6248 /* perform each probe synchronously */
6249 DPRINTK("probe begin\n");
6250 for (i
= 0; i
< host
->n_ports
; i
++) {
6251 struct ata_port
*ap
= host
->ports
[i
];
6255 if (ap
->ops
->error_handler
) {
6256 struct ata_eh_info
*ehi
= &ap
->eh_info
;
6257 unsigned long flags
;
6261 /* kick EH for boot probing */
6262 spin_lock_irqsave(ap
->lock
, flags
);
6264 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
6265 ehi
->action
|= ATA_EH_SOFTRESET
;
6266 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6268 ap
->pflags
|= ATA_PFLAG_LOADING
;
6269 ata_port_schedule_eh(ap
);
6271 spin_unlock_irqrestore(ap
->lock
, flags
);
6273 /* wait for EH to finish */
6274 ata_port_wait_eh(ap
);
6276 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6277 rc
= ata_bus_probe(ap
);
6278 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6281 /* FIXME: do something useful here?
6282 * Current libata behavior will
6283 * tear down everything when
6284 * the module is removed
6285 * or the h/w is unplugged.
6291 /* probes are done, now scan each port's disk(s) */
6292 DPRINTK("host probe begin\n");
6293 for (i
= 0; i
< host
->n_ports
; i
++) {
6294 struct ata_port
*ap
= host
->ports
[i
];
6296 ata_scsi_scan_host(ap
);
6303 * ata_host_activate - start host, request IRQ and register it
6304 * @host: target ATA host
6305 * @irq: IRQ to request
6306 * @irq_handler: irq_handler used when requesting IRQ
6307 * @irq_flags: irq_flags used when requesting IRQ
6308 * @sht: scsi_host_template to use when registering the host
6310 * After allocating an ATA host and initializing it, most libata
6311 * LLDs perform three steps to activate the host - start host,
6312 * request IRQ and register it. This helper takes necessasry
6313 * arguments and performs the three steps in one go.
6316 * Inherited from calling layer (may sleep).
6319 * 0 on success, -errno otherwise.
6321 int ata_host_activate(struct ata_host
*host
, int irq
,
6322 irq_handler_t irq_handler
, unsigned long irq_flags
,
6323 struct scsi_host_template
*sht
)
6327 rc
= ata_host_start(host
);
6331 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6332 dev_driver_string(host
->dev
), host
);
6336 rc
= ata_host_register(host
, sht
);
6337 /* if failed, just free the IRQ and leave ports alone */
6339 devm_free_irq(host
->dev
, irq
, host
);
6345 * ata_port_detach - Detach ATA port in prepration of device removal
6346 * @ap: ATA port to be detached
6348 * Detach all ATA devices and the associated SCSI devices of @ap;
6349 * then, remove the associated SCSI host. @ap is guaranteed to
6350 * be quiescent on return from this function.
6353 * Kernel thread context (may sleep).
6355 void ata_port_detach(struct ata_port
*ap
)
6357 unsigned long flags
;
6360 if (!ap
->ops
->error_handler
)
6363 /* tell EH we're leaving & flush EH */
6364 spin_lock_irqsave(ap
->lock
, flags
);
6365 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6366 spin_unlock_irqrestore(ap
->lock
, flags
);
6368 ata_port_wait_eh(ap
);
6370 /* EH is now guaranteed to see UNLOADING, so no new device
6371 * will be attached. Disable all existing devices.
6373 spin_lock_irqsave(ap
->lock
, flags
);
6375 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
6376 ata_dev_disable(&ap
->device
[i
]);
6378 spin_unlock_irqrestore(ap
->lock
, flags
);
6380 /* Final freeze & EH. All in-flight commands are aborted. EH
6381 * will be skipped and retrials will be terminated with bad
6384 spin_lock_irqsave(ap
->lock
, flags
);
6385 ata_port_freeze(ap
); /* won't be thawed */
6386 spin_unlock_irqrestore(ap
->lock
, flags
);
6388 ata_port_wait_eh(ap
);
6390 /* Flush hotplug task. The sequence is similar to
6391 * ata_port_flush_task().
6393 flush_workqueue(ata_aux_wq
);
6394 cancel_delayed_work(&ap
->hotplug_task
);
6395 flush_workqueue(ata_aux_wq
);
6398 /* remove the associated SCSI host */
6399 scsi_remove_host(ap
->scsi_host
);
6403 * ata_host_detach - Detach all ports of an ATA host
6404 * @host: Host to detach
6406 * Detach all ports of @host.
6409 * Kernel thread context (may sleep).
6411 void ata_host_detach(struct ata_host
*host
)
6415 for (i
= 0; i
< host
->n_ports
; i
++)
6416 ata_port_detach(host
->ports
[i
]);
6420 * ata_std_ports - initialize ioaddr with standard port offsets.
6421 * @ioaddr: IO address structure to be initialized
6423 * Utility function which initializes data_addr, error_addr,
6424 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6425 * device_addr, status_addr, and command_addr to standard offsets
6426 * relative to cmd_addr.
6428 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6431 void ata_std_ports(struct ata_ioports
*ioaddr
)
6433 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6434 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6435 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6436 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6437 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6438 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6439 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6440 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6441 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6442 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6449 * ata_pci_remove_one - PCI layer callback for device removal
6450 * @pdev: PCI device that was removed
6452 * PCI layer indicates to libata via this hook that hot-unplug or
6453 * module unload event has occurred. Detach all ports. Resource
6454 * release is handled via devres.
6457 * Inherited from PCI layer (may sleep).
6459 void ata_pci_remove_one(struct pci_dev
*pdev
)
6461 struct device
*dev
= pci_dev_to_dev(pdev
);
6462 struct ata_host
*host
= dev_get_drvdata(dev
);
6464 ata_host_detach(host
);
6467 /* move to PCI subsystem */
6468 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6470 unsigned long tmp
= 0;
6472 switch (bits
->width
) {
6475 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6481 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6487 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6498 return (tmp
== bits
->val
) ? 1 : 0;
6502 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6504 pci_save_state(pdev
);
6505 pci_disable_device(pdev
);
6507 if (mesg
.event
== PM_EVENT_SUSPEND
)
6508 pci_set_power_state(pdev
, PCI_D3hot
);
6511 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6515 pci_set_power_state(pdev
, PCI_D0
);
6516 pci_restore_state(pdev
);
6518 rc
= pcim_enable_device(pdev
);
6520 dev_printk(KERN_ERR
, &pdev
->dev
,
6521 "failed to enable device after resume (%d)\n", rc
);
6525 pci_set_master(pdev
);
6529 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6531 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6534 rc
= ata_host_suspend(host
, mesg
);
6538 ata_pci_device_do_suspend(pdev
, mesg
);
6543 int ata_pci_device_resume(struct pci_dev
*pdev
)
6545 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6548 rc
= ata_pci_device_do_resume(pdev
);
6550 ata_host_resume(host
);
6553 #endif /* CONFIG_PM */
6555 #endif /* CONFIG_PCI */
6558 static int __init
ata_init(void)
6560 ata_probe_timeout
*= HZ
;
6561 ata_wq
= create_workqueue("ata");
6565 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6567 destroy_workqueue(ata_wq
);
6571 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6575 static void __exit
ata_exit(void)
6577 destroy_workqueue(ata_wq
);
6578 destroy_workqueue(ata_aux_wq
);
6581 subsys_initcall(ata_init
);
6582 module_exit(ata_exit
);
6584 static unsigned long ratelimit_time
;
6585 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6587 int ata_ratelimit(void)
6590 unsigned long flags
;
6592 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6594 if (time_after(jiffies
, ratelimit_time
)) {
6596 ratelimit_time
= jiffies
+ (HZ
/5);
6600 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6606 * ata_wait_register - wait until register value changes
6607 * @reg: IO-mapped register
6608 * @mask: Mask to apply to read register value
6609 * @val: Wait condition
6610 * @interval_msec: polling interval in milliseconds
6611 * @timeout_msec: timeout in milliseconds
6613 * Waiting for some bits of register to change is a common
6614 * operation for ATA controllers. This function reads 32bit LE
6615 * IO-mapped register @reg and tests for the following condition.
6617 * (*@reg & mask) != val
6619 * If the condition is met, it returns; otherwise, the process is
6620 * repeated after @interval_msec until timeout.
6623 * Kernel thread context (may sleep)
6626 * The final register value.
6628 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6629 unsigned long interval_msec
,
6630 unsigned long timeout_msec
)
6632 unsigned long timeout
;
6635 tmp
= ioread32(reg
);
6637 /* Calculate timeout _after_ the first read to make sure
6638 * preceding writes reach the controller before starting to
6639 * eat away the timeout.
6641 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6643 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6644 msleep(interval_msec
);
6645 tmp
= ioread32(reg
);
6654 static void ata_dummy_noret(struct ata_port
*ap
) { }
6655 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6656 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6658 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6663 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6665 return AC_ERR_SYSTEM
;
6668 const struct ata_port_operations ata_dummy_port_ops
= {
6669 .port_disable
= ata_port_disable
,
6670 .check_status
= ata_dummy_check_status
,
6671 .check_altstatus
= ata_dummy_check_status
,
6672 .dev_select
= ata_noop_dev_select
,
6673 .qc_prep
= ata_noop_qc_prep
,
6674 .qc_issue
= ata_dummy_qc_issue
,
6675 .freeze
= ata_dummy_noret
,
6676 .thaw
= ata_dummy_noret
,
6677 .error_handler
= ata_dummy_noret
,
6678 .post_internal_cmd
= ata_dummy_qc_noret
,
6679 .irq_clear
= ata_dummy_noret
,
6680 .port_start
= ata_dummy_ret0
,
6681 .port_stop
= ata_dummy_noret
,
6684 const struct ata_port_info ata_dummy_port_info
= {
6685 .port_ops
= &ata_dummy_port_ops
,
6689 * libata is essentially a library of internal helper functions for
6690 * low-level ATA host controller drivers. As such, the API/ABI is
6691 * likely to change as new drivers are added and updated.
6692 * Do not depend on ABI/API stability.
6695 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6696 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6697 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6698 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6699 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6700 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6701 EXPORT_SYMBOL_GPL(ata_std_ports
);
6702 EXPORT_SYMBOL_GPL(ata_host_init
);
6703 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6704 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6705 EXPORT_SYMBOL_GPL(ata_host_start
);
6706 EXPORT_SYMBOL_GPL(ata_host_register
);
6707 EXPORT_SYMBOL_GPL(ata_host_activate
);
6708 EXPORT_SYMBOL_GPL(ata_host_detach
);
6709 EXPORT_SYMBOL_GPL(ata_sg_init
);
6710 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6711 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6712 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6713 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6714 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6715 EXPORT_SYMBOL_GPL(ata_tf_load
);
6716 EXPORT_SYMBOL_GPL(ata_tf_read
);
6717 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6718 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6719 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6720 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6721 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6722 EXPORT_SYMBOL_GPL(ata_check_status
);
6723 EXPORT_SYMBOL_GPL(ata_altstatus
);
6724 EXPORT_SYMBOL_GPL(ata_exec_command
);
6725 EXPORT_SYMBOL_GPL(ata_port_start
);
6726 EXPORT_SYMBOL_GPL(ata_interrupt
);
6727 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6728 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6729 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6730 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6731 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6732 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6733 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6734 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6735 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6736 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6737 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6738 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6739 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6740 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6741 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6742 EXPORT_SYMBOL_GPL(ata_port_probe
);
6743 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6744 EXPORT_SYMBOL_GPL(sata_set_spd
);
6745 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6746 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6747 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6748 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6749 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6750 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6751 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6752 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6753 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6754 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6755 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6756 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6757 EXPORT_SYMBOL_GPL(ata_port_disable
);
6758 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6759 EXPORT_SYMBOL_GPL(ata_wait_register
);
6760 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6761 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6762 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6763 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6764 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6765 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6766 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6767 EXPORT_SYMBOL_GPL(ata_host_intr
);
6768 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6769 EXPORT_SYMBOL_GPL(sata_scr_read
);
6770 EXPORT_SYMBOL_GPL(sata_scr_write
);
6771 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6772 EXPORT_SYMBOL_GPL(ata_port_online
);
6773 EXPORT_SYMBOL_GPL(ata_port_offline
);
6775 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6776 EXPORT_SYMBOL_GPL(ata_host_resume
);
6777 #endif /* CONFIG_PM */
6778 EXPORT_SYMBOL_GPL(ata_id_string
);
6779 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6780 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
6781 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6782 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6784 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6785 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6786 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6789 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6790 EXPORT_SYMBOL_GPL(ata_pci_init_native_host
);
6791 EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host
);
6792 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6793 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6795 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6796 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6797 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6798 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6799 #endif /* CONFIG_PM */
6800 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6801 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6802 #endif /* CONFIG_PCI */
6805 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
6806 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);
6807 #endif /* CONFIG_PM */
6809 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6810 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6811 EXPORT_SYMBOL_GPL(ata_port_abort
);
6812 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6813 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6814 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6815 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6816 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6817 EXPORT_SYMBOL_GPL(ata_do_eh
);
6818 EXPORT_SYMBOL_GPL(ata_irq_on
);
6819 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6820 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6821 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6822 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
6824 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6825 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6826 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6827 EXPORT_SYMBOL_GPL(ata_cable_sata
);