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 "2.21" /* 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
898 * @new_sectors: new max sectors value to set for the device
900 * Perform an LBA48 size set max upon the device in question. Return the
901 * actual LBA48 size or zero if the command fails.
904 static u64
ata_set_native_max_address_ext(struct ata_device
*dev
, u64 new_sectors
)
907 struct ata_taskfile tf
;
911 ata_tf_init(dev
, &tf
);
913 tf
.command
= ATA_CMD_SET_MAX_EXT
;
914 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
| ATA_TFLAG_ISADDR
;
915 tf
.protocol
|= ATA_PROT_NODATA
;
918 tf
.lbal
= (new_sectors
>> 0) & 0xff;
919 tf
.lbam
= (new_sectors
>> 8) & 0xff;
920 tf
.lbah
= (new_sectors
>> 16) & 0xff;
922 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
923 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
924 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
926 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
930 return ata_tf_to_lba48(&tf
);
934 * ata_set_native_max_address - LBA28 native max set
935 * @dev: Device to query
936 * @new_sectors: new max sectors value to set for the device
938 * Perform an LBA28 size set max upon the device in question. Return the
939 * actual LBA28 size or zero if the command fails.
942 static u64
ata_set_native_max_address(struct ata_device
*dev
, u64 new_sectors
)
945 struct ata_taskfile tf
;
949 ata_tf_init(dev
, &tf
);
951 tf
.command
= ATA_CMD_SET_MAX
;
952 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
953 tf
.protocol
|= ATA_PROT_NODATA
;
955 tf
.lbal
= (new_sectors
>> 0) & 0xff;
956 tf
.lbam
= (new_sectors
>> 8) & 0xff;
957 tf
.lbah
= (new_sectors
>> 16) & 0xff;
958 tf
.device
|= ((new_sectors
>> 24) & 0x0f) | 0x40;
960 err
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
964 return ata_tf_to_lba(&tf
);
968 * ata_hpa_resize - Resize a device with an HPA set
969 * @dev: Device to resize
971 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
972 * it if required to the full size of the media. The caller must check
973 * the drive has the HPA feature set enabled.
976 static u64
ata_hpa_resize(struct ata_device
*dev
)
978 u64 sectors
= dev
->n_sectors
;
981 if (ata_id_has_lba48(dev
->id
))
982 hpa_sectors
= ata_read_native_max_address_ext(dev
);
984 hpa_sectors
= ata_read_native_max_address(dev
);
986 /* if no hpa, both should be equal */
987 ata_dev_printk(dev
, KERN_INFO
, "%s 1: sectors = %lld, "
988 "hpa_sectors = %lld\n",
989 __FUNCTION__
, (long long)sectors
, (long long)hpa_sectors
);
991 if (hpa_sectors
> sectors
) {
992 ata_dev_printk(dev
, KERN_INFO
,
993 "Host Protected Area detected:\n"
994 "\tcurrent size: %lld sectors\n"
995 "\tnative size: %lld sectors\n",
996 (long long)sectors
, (long long)hpa_sectors
);
998 if (ata_ignore_hpa
) {
999 if (ata_id_has_lba48(dev
->id
))
1000 hpa_sectors
= ata_set_native_max_address_ext(dev
, hpa_sectors
);
1002 hpa_sectors
= ata_set_native_max_address(dev
,
1006 ata_dev_printk(dev
, KERN_INFO
, "native size "
1007 "increased to %lld sectors\n",
1008 (long long)hpa_sectors
);
1016 static u64
ata_id_n_sectors(const u16
*id
)
1018 if (ata_id_has_lba(id
)) {
1019 if (ata_id_has_lba48(id
))
1020 return ata_id_u64(id
, 100);
1022 return ata_id_u32(id
, 60);
1024 if (ata_id_current_chs_valid(id
))
1025 return ata_id_u32(id
, 57);
1027 return id
[1] * id
[3] * id
[6];
1032 * ata_id_to_dma_mode - Identify DMA mode from id block
1033 * @dev: device to identify
1034 * @unknown: mode to assume if we cannot tell
1036 * Set up the timing values for the device based upon the identify
1037 * reported values for the DMA mode. This function is used by drivers
1038 * which rely upon firmware configured modes, but wish to report the
1039 * mode correctly when possible.
1041 * In addition we emit similarly formatted messages to the default
1042 * ata_dev_set_mode handler, in order to provide consistency of
1046 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1051 /* Pack the DMA modes */
1052 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1053 if (dev
->id
[53] & 0x04)
1054 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1056 /* Select the mode in use */
1057 mode
= ata_xfer_mask2mode(mask
);
1060 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1061 ata_mode_string(mask
));
1063 /* SWDMA perhaps ? */
1065 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1068 /* Configure the device reporting */
1069 dev
->xfer_mode
= mode
;
1070 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1074 * ata_noop_dev_select - Select device 0/1 on ATA bus
1075 * @ap: ATA channel to manipulate
1076 * @device: ATA device (numbered from zero) to select
1078 * This function performs no actual function.
1080 * May be used as the dev_select() entry in ata_port_operations.
1085 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1091 * ata_std_dev_select - Select device 0/1 on ATA bus
1092 * @ap: ATA channel to manipulate
1093 * @device: ATA device (numbered from zero) to select
1095 * Use the method defined in the ATA specification to
1096 * make either device 0, or device 1, active on the
1097 * ATA channel. Works with both PIO and MMIO.
1099 * May be used as the dev_select() entry in ata_port_operations.
1105 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1110 tmp
= ATA_DEVICE_OBS
;
1112 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1114 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1115 ata_pause(ap
); /* needed; also flushes, for mmio */
1119 * ata_dev_select - Select device 0/1 on ATA bus
1120 * @ap: ATA channel to manipulate
1121 * @device: ATA device (numbered from zero) to select
1122 * @wait: non-zero to wait for Status register BSY bit to clear
1123 * @can_sleep: non-zero if context allows sleeping
1125 * Use the method defined in the ATA specification to
1126 * make either device 0, or device 1, active on the
1129 * This is a high-level version of ata_std_dev_select(),
1130 * which additionally provides the services of inserting
1131 * the proper pauses and status polling, where needed.
1137 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1138 unsigned int wait
, unsigned int can_sleep
)
1140 if (ata_msg_probe(ap
))
1141 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1142 "device %u, wait %u\n", device
, wait
);
1147 ap
->ops
->dev_select(ap
, device
);
1150 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1157 * ata_dump_id - IDENTIFY DEVICE info debugging output
1158 * @id: IDENTIFY DEVICE page to dump
1160 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1167 static inline void ata_dump_id(const u16
*id
)
1169 DPRINTK("49==0x%04x "
1179 DPRINTK("80==0x%04x "
1189 DPRINTK("88==0x%04x "
1196 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1197 * @id: IDENTIFY data to compute xfer mask from
1199 * Compute the xfermask for this device. This is not as trivial
1200 * as it seems if we must consider early devices correctly.
1202 * FIXME: pre IDE drive timing (do we care ?).
1210 static unsigned int ata_id_xfermask(const u16
*id
)
1212 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1214 /* Usual case. Word 53 indicates word 64 is valid */
1215 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1216 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1220 /* If word 64 isn't valid then Word 51 high byte holds
1221 * the PIO timing number for the maximum. Turn it into
1224 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1225 if (mode
< 5) /* Valid PIO range */
1226 pio_mask
= (2 << mode
) - 1;
1230 /* But wait.. there's more. Design your standards by
1231 * committee and you too can get a free iordy field to
1232 * process. However its the speeds not the modes that
1233 * are supported... Note drivers using the timing API
1234 * will get this right anyway
1238 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1240 if (ata_id_is_cfa(id
)) {
1242 * Process compact flash extended modes
1244 int pio
= id
[163] & 0x7;
1245 int dma
= (id
[163] >> 3) & 7;
1248 pio_mask
|= (1 << 5);
1250 pio_mask
|= (1 << 6);
1252 mwdma_mask
|= (1 << 3);
1254 mwdma_mask
|= (1 << 4);
1258 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1259 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1261 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1265 * ata_port_queue_task - Queue port_task
1266 * @ap: The ata_port to queue port_task for
1267 * @fn: workqueue function to be scheduled
1268 * @data: data for @fn to use
1269 * @delay: delay time for workqueue function
1271 * Schedule @fn(@data) for execution after @delay jiffies using
1272 * port_task. There is one port_task per port and it's the
1273 * user(low level driver)'s responsibility to make sure that only
1274 * one task is active at any given time.
1276 * libata core layer takes care of synchronization between
1277 * port_task and EH. ata_port_queue_task() may be ignored for EH
1281 * Inherited from caller.
1283 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1284 unsigned long delay
)
1288 if (ap
->pflags
& ATA_PFLAG_FLUSH_PORT_TASK
)
1291 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1292 ap
->port_task_data
= data
;
1294 rc
= queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1296 /* rc == 0 means that another user is using port task */
1301 * ata_port_flush_task - Flush port_task
1302 * @ap: The ata_port to flush port_task for
1304 * After this function completes, port_task is guranteed not to
1305 * be running or scheduled.
1308 * Kernel thread context (may sleep)
1310 void ata_port_flush_task(struct ata_port
*ap
)
1312 unsigned long flags
;
1316 spin_lock_irqsave(ap
->lock
, flags
);
1317 ap
->pflags
|= ATA_PFLAG_FLUSH_PORT_TASK
;
1318 spin_unlock_irqrestore(ap
->lock
, flags
);
1320 DPRINTK("flush #1\n");
1321 cancel_work_sync(&ap
->port_task
.work
); /* akpm: seems unneeded */
1324 * At this point, if a task is running, it's guaranteed to see
1325 * the FLUSH flag; thus, it will never queue pio tasks again.
1328 if (!cancel_delayed_work(&ap
->port_task
)) {
1329 if (ata_msg_ctl(ap
))
1330 ata_port_printk(ap
, KERN_DEBUG
, "%s: flush #2\n",
1332 cancel_work_sync(&ap
->port_task
.work
);
1335 spin_lock_irqsave(ap
->lock
, flags
);
1336 ap
->pflags
&= ~ATA_PFLAG_FLUSH_PORT_TASK
;
1337 spin_unlock_irqrestore(ap
->lock
, flags
);
1339 if (ata_msg_ctl(ap
))
1340 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1343 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1345 struct completion
*waiting
= qc
->private_data
;
1351 * ata_exec_internal_sg - execute libata internal command
1352 * @dev: Device to which the command is sent
1353 * @tf: Taskfile registers for the command and the result
1354 * @cdb: CDB for packet command
1355 * @dma_dir: Data tranfer direction of the command
1356 * @sg: sg list for the data buffer of the command
1357 * @n_elem: Number of sg entries
1359 * Executes libata internal command with timeout. @tf contains
1360 * command on entry and result on return. Timeout and error
1361 * conditions are reported via return value. No recovery action
1362 * is taken after a command times out. It's caller's duty to
1363 * clean up after timeout.
1366 * None. Should be called with kernel context, might sleep.
1369 * Zero on success, AC_ERR_* mask on failure
1371 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1372 struct ata_taskfile
*tf
, const u8
*cdb
,
1373 int dma_dir
, struct scatterlist
*sg
,
1374 unsigned int n_elem
)
1376 struct ata_port
*ap
= dev
->ap
;
1377 u8 command
= tf
->command
;
1378 struct ata_queued_cmd
*qc
;
1379 unsigned int tag
, preempted_tag
;
1380 u32 preempted_sactive
, preempted_qc_active
;
1381 DECLARE_COMPLETION_ONSTACK(wait
);
1382 unsigned long flags
;
1383 unsigned int err_mask
;
1386 spin_lock_irqsave(ap
->lock
, flags
);
1388 /* no internal command while frozen */
1389 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1390 spin_unlock_irqrestore(ap
->lock
, flags
);
1391 return AC_ERR_SYSTEM
;
1394 /* initialize internal qc */
1396 /* XXX: Tag 0 is used for drivers with legacy EH as some
1397 * drivers choke if any other tag is given. This breaks
1398 * ata_tag_internal() test for those drivers. Don't use new
1399 * EH stuff without converting to it.
1401 if (ap
->ops
->error_handler
)
1402 tag
= ATA_TAG_INTERNAL
;
1406 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1408 qc
= __ata_qc_from_tag(ap
, tag
);
1416 preempted_tag
= ap
->active_tag
;
1417 preempted_sactive
= ap
->sactive
;
1418 preempted_qc_active
= ap
->qc_active
;
1419 ap
->active_tag
= ATA_TAG_POISON
;
1423 /* prepare & issue qc */
1426 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1427 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1428 qc
->dma_dir
= dma_dir
;
1429 if (dma_dir
!= DMA_NONE
) {
1430 unsigned int i
, buflen
= 0;
1432 for (i
= 0; i
< n_elem
; i
++)
1433 buflen
+= sg
[i
].length
;
1435 ata_sg_init(qc
, sg
, n_elem
);
1436 qc
->nbytes
= buflen
;
1439 qc
->private_data
= &wait
;
1440 qc
->complete_fn
= ata_qc_complete_internal
;
1444 spin_unlock_irqrestore(ap
->lock
, flags
);
1446 rc
= wait_for_completion_timeout(&wait
, ata_probe_timeout
);
1448 ata_port_flush_task(ap
);
1451 spin_lock_irqsave(ap
->lock
, flags
);
1453 /* We're racing with irq here. If we lose, the
1454 * following test prevents us from completing the qc
1455 * twice. If we win, the port is frozen and will be
1456 * cleaned up by ->post_internal_cmd().
1458 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1459 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1461 if (ap
->ops
->error_handler
)
1462 ata_port_freeze(ap
);
1464 ata_qc_complete(qc
);
1466 if (ata_msg_warn(ap
))
1467 ata_dev_printk(dev
, KERN_WARNING
,
1468 "qc timeout (cmd 0x%x)\n", command
);
1471 spin_unlock_irqrestore(ap
->lock
, flags
);
1474 /* do post_internal_cmd */
1475 if (ap
->ops
->post_internal_cmd
)
1476 ap
->ops
->post_internal_cmd(qc
);
1478 /* perform minimal error analysis */
1479 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1480 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1481 qc
->err_mask
|= AC_ERR_DEV
;
1484 qc
->err_mask
|= AC_ERR_OTHER
;
1486 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1487 qc
->err_mask
&= ~AC_ERR_OTHER
;
1491 spin_lock_irqsave(ap
->lock
, flags
);
1493 *tf
= qc
->result_tf
;
1494 err_mask
= qc
->err_mask
;
1497 ap
->active_tag
= preempted_tag
;
1498 ap
->sactive
= preempted_sactive
;
1499 ap
->qc_active
= preempted_qc_active
;
1501 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1502 * Until those drivers are fixed, we detect the condition
1503 * here, fail the command with AC_ERR_SYSTEM and reenable the
1506 * Note that this doesn't change any behavior as internal
1507 * command failure results in disabling the device in the
1508 * higher layer for LLDDs without new reset/EH callbacks.
1510 * Kill the following code as soon as those drivers are fixed.
1512 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1513 err_mask
|= AC_ERR_SYSTEM
;
1517 spin_unlock_irqrestore(ap
->lock
, flags
);
1523 * ata_exec_internal - execute libata internal command
1524 * @dev: Device to which the command is sent
1525 * @tf: Taskfile registers for the command and the result
1526 * @cdb: CDB for packet command
1527 * @dma_dir: Data tranfer direction of the command
1528 * @buf: Data buffer of the command
1529 * @buflen: Length of data buffer
1531 * Wrapper around ata_exec_internal_sg() which takes simple
1532 * buffer instead of sg list.
1535 * None. Should be called with kernel context, might sleep.
1538 * Zero on success, AC_ERR_* mask on failure
1540 unsigned ata_exec_internal(struct ata_device
*dev
,
1541 struct ata_taskfile
*tf
, const u8
*cdb
,
1542 int dma_dir
, void *buf
, unsigned int buflen
)
1544 struct scatterlist
*psg
= NULL
, sg
;
1545 unsigned int n_elem
= 0;
1547 if (dma_dir
!= DMA_NONE
) {
1549 sg_init_one(&sg
, buf
, buflen
);
1554 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
);
1558 * ata_do_simple_cmd - execute simple internal command
1559 * @dev: Device to which the command is sent
1560 * @cmd: Opcode to execute
1562 * Execute a 'simple' command, that only consists of the opcode
1563 * 'cmd' itself, without filling any other registers
1566 * Kernel thread context (may sleep).
1569 * Zero on success, AC_ERR_* mask on failure
1571 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1573 struct ata_taskfile tf
;
1575 ata_tf_init(dev
, &tf
);
1578 tf
.flags
|= ATA_TFLAG_DEVICE
;
1579 tf
.protocol
= ATA_PROT_NODATA
;
1581 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1585 * ata_pio_need_iordy - check if iordy needed
1588 * Check if the current speed of the device requires IORDY. Used
1589 * by various controllers for chip configuration.
1592 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1594 /* Controller doesn't support IORDY. Probably a pointless check
1595 as the caller should know this */
1596 if (adev
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1598 /* PIO3 and higher it is mandatory */
1599 if (adev
->pio_mode
> XFER_PIO_2
)
1601 /* We turn it on when possible */
1602 if (ata_id_has_iordy(adev
->id
))
1608 * ata_pio_mask_no_iordy - Return the non IORDY mask
1611 * Compute the highest mode possible if we are not using iordy. Return
1612 * -1 if no iordy mode is available.
1615 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1617 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1618 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1619 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1620 /* Is the speed faster than the drive allows non IORDY ? */
1622 /* This is cycle times not frequency - watch the logic! */
1623 if (pio
> 240) /* PIO2 is 240nS per cycle */
1624 return 3 << ATA_SHIFT_PIO
;
1625 return 7 << ATA_SHIFT_PIO
;
1628 return 3 << ATA_SHIFT_PIO
;
1632 * ata_dev_read_id - Read ID data from the specified device
1633 * @dev: target device
1634 * @p_class: pointer to class of the target device (may be changed)
1635 * @flags: ATA_READID_* flags
1636 * @id: buffer to read IDENTIFY data into
1638 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1639 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1640 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1641 * for pre-ATA4 drives.
1644 * Kernel thread context (may sleep)
1647 * 0 on success, -errno otherwise.
1649 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1650 unsigned int flags
, u16
*id
)
1652 struct ata_port
*ap
= dev
->ap
;
1653 unsigned int class = *p_class
;
1654 struct ata_taskfile tf
;
1655 unsigned int err_mask
= 0;
1657 int may_fallback
= 1, tried_spinup
= 0;
1660 if (ata_msg_ctl(ap
))
1661 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1663 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1665 ata_tf_init(dev
, &tf
);
1669 tf
.command
= ATA_CMD_ID_ATA
;
1672 tf
.command
= ATA_CMD_ID_ATAPI
;
1676 reason
= "unsupported class";
1680 tf
.protocol
= ATA_PROT_PIO
;
1682 /* Some devices choke if TF registers contain garbage. Make
1683 * sure those are properly initialized.
1685 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1687 /* Device presence detection is unreliable on some
1688 * controllers. Always poll IDENTIFY if available.
1690 tf
.flags
|= ATA_TFLAG_POLLING
;
1692 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1693 id
, sizeof(id
[0]) * ATA_ID_WORDS
);
1695 if (err_mask
& AC_ERR_NODEV_HINT
) {
1696 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1697 ap
->print_id
, dev
->devno
);
1701 /* Device or controller might have reported the wrong
1702 * device class. Give a shot at the other IDENTIFY if
1703 * the current one is aborted by the device.
1706 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1709 if (class == ATA_DEV_ATA
)
1710 class = ATA_DEV_ATAPI
;
1712 class = ATA_DEV_ATA
;
1717 reason
= "I/O error";
1721 /* Falling back doesn't make sense if ID data was read
1722 * successfully at least once.
1726 swap_buf_le16(id
, ATA_ID_WORDS
);
1730 reason
= "device reports invalid type";
1732 if (class == ATA_DEV_ATA
) {
1733 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1736 if (ata_id_is_ata(id
))
1740 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1743 * Drive powered-up in standby mode, and requires a specific
1744 * SET_FEATURES spin-up subcommand before it will accept
1745 * anything other than the original IDENTIFY command.
1747 ata_tf_init(dev
, &tf
);
1748 tf
.command
= ATA_CMD_SET_FEATURES
;
1749 tf
.feature
= SETFEATURES_SPINUP
;
1750 tf
.protocol
= ATA_PROT_NODATA
;
1751 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1752 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
1755 reason
= "SPINUP failed";
1759 * If the drive initially returned incomplete IDENTIFY info,
1760 * we now must reissue the IDENTIFY command.
1762 if (id
[2] == 0x37c8)
1766 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1768 * The exact sequence expected by certain pre-ATA4 drives is:
1771 * INITIALIZE DEVICE PARAMETERS
1773 * Some drives were very specific about that exact sequence.
1775 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1776 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1779 reason
= "INIT_DEV_PARAMS failed";
1783 /* current CHS translation info (id[53-58]) might be
1784 * changed. reread the identify device info.
1786 flags
&= ~ATA_READID_POSTRESET
;
1796 if (ata_msg_warn(ap
))
1797 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
1798 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
1802 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
1804 return ((dev
->ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
1807 static void ata_dev_config_ncq(struct ata_device
*dev
,
1808 char *desc
, size_t desc_sz
)
1810 struct ata_port
*ap
= dev
->ap
;
1811 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
1813 if (!ata_id_has_ncq(dev
->id
)) {
1817 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_NONCQ
) {
1818 snprintf(desc
, desc_sz
, "NCQ (not used)");
1821 if (ap
->flags
& ATA_FLAG_NCQ
) {
1822 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
1823 dev
->flags
|= ATA_DFLAG_NCQ
;
1826 if (hdepth
>= ddepth
)
1827 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
1829 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
1833 * ata_dev_configure - Configure the specified ATA/ATAPI device
1834 * @dev: Target device to configure
1836 * Configure @dev according to @dev->id. Generic and low-level
1837 * driver specific fixups are also applied.
1840 * Kernel thread context (may sleep)
1843 * 0 on success, -errno otherwise
1845 int ata_dev_configure(struct ata_device
*dev
)
1847 struct ata_port
*ap
= dev
->ap
;
1848 int print_info
= ap
->eh_context
.i
.flags
& ATA_EHI_PRINTINFO
;
1849 const u16
*id
= dev
->id
;
1850 unsigned int xfer_mask
;
1851 char revbuf
[7]; /* XYZ-99\0 */
1852 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
1853 char modelbuf
[ATA_ID_PROD_LEN
+1];
1856 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
1857 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
1862 if (ata_msg_probe(ap
))
1863 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1866 rc
= ata_acpi_push_id(dev
);
1868 ata_dev_printk(dev
, KERN_WARNING
, "failed to set _SDD(%d)\n",
1872 /* retrieve and execute the ATA task file of _GTF */
1873 ata_acpi_exec_tfs(ap
);
1875 /* print device capabilities */
1876 if (ata_msg_probe(ap
))
1877 ata_dev_printk(dev
, KERN_DEBUG
,
1878 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1879 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1881 id
[49], id
[82], id
[83], id
[84],
1882 id
[85], id
[86], id
[87], id
[88]);
1884 /* initialize to-be-configured parameters */
1885 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
1886 dev
->max_sectors
= 0;
1894 * common ATA, ATAPI feature tests
1897 /* find max transfer mode; for printk only */
1898 xfer_mask
= ata_id_xfermask(id
);
1900 if (ata_msg_probe(ap
))
1903 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1904 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
1907 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
1910 /* ATA-specific feature tests */
1911 if (dev
->class == ATA_DEV_ATA
) {
1912 if (ata_id_is_cfa(id
)) {
1913 if (id
[162] & 1) /* CPRM may make this media unusable */
1914 ata_dev_printk(dev
, KERN_WARNING
,
1915 "supports DRM functions and may "
1916 "not be fully accessable.\n");
1917 snprintf(revbuf
, 7, "CFA");
1920 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
1922 dev
->n_sectors
= ata_id_n_sectors(id
);
1924 if (dev
->id
[59] & 0x100)
1925 dev
->multi_count
= dev
->id
[59] & 0xff;
1927 if (ata_id_has_lba(id
)) {
1928 const char *lba_desc
;
1932 dev
->flags
|= ATA_DFLAG_LBA
;
1933 if (ata_id_has_lba48(id
)) {
1934 dev
->flags
|= ATA_DFLAG_LBA48
;
1937 if (dev
->n_sectors
>= (1UL << 28) &&
1938 ata_id_has_flush_ext(id
))
1939 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
1942 if (ata_id_hpa_enabled(dev
->id
))
1943 dev
->n_sectors
= ata_hpa_resize(dev
);
1946 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
1948 /* print device info to dmesg */
1949 if (ata_msg_drv(ap
) && print_info
) {
1950 ata_dev_printk(dev
, KERN_INFO
,
1951 "%s: %s, %s, max %s\n",
1952 revbuf
, modelbuf
, fwrevbuf
,
1953 ata_mode_string(xfer_mask
));
1954 ata_dev_printk(dev
, KERN_INFO
,
1955 "%Lu sectors, multi %u: %s %s\n",
1956 (unsigned long long)dev
->n_sectors
,
1957 dev
->multi_count
, lba_desc
, ncq_desc
);
1962 /* Default translation */
1963 dev
->cylinders
= id
[1];
1965 dev
->sectors
= id
[6];
1967 if (ata_id_current_chs_valid(id
)) {
1968 /* Current CHS translation is valid. */
1969 dev
->cylinders
= id
[54];
1970 dev
->heads
= id
[55];
1971 dev
->sectors
= id
[56];
1974 /* print device info to dmesg */
1975 if (ata_msg_drv(ap
) && print_info
) {
1976 ata_dev_printk(dev
, KERN_INFO
,
1977 "%s: %s, %s, max %s\n",
1978 revbuf
, modelbuf
, fwrevbuf
,
1979 ata_mode_string(xfer_mask
));
1980 ata_dev_printk(dev
, KERN_INFO
,
1981 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1982 (unsigned long long)dev
->n_sectors
,
1983 dev
->multi_count
, dev
->cylinders
,
1984 dev
->heads
, dev
->sectors
);
1991 /* ATAPI-specific feature tests */
1992 else if (dev
->class == ATA_DEV_ATAPI
) {
1993 char *cdb_intr_string
= "";
1995 rc
= atapi_cdb_len(id
);
1996 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1997 if (ata_msg_warn(ap
))
1998 ata_dev_printk(dev
, KERN_WARNING
,
1999 "unsupported CDB len\n");
2003 dev
->cdb_len
= (unsigned int) rc
;
2005 if (ata_id_cdb_intr(dev
->id
)) {
2006 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2007 cdb_intr_string
= ", CDB intr";
2010 /* print device info to dmesg */
2011 if (ata_msg_drv(ap
) && print_info
)
2012 ata_dev_printk(dev
, KERN_INFO
,
2013 "ATAPI: %s, %s, max %s%s\n",
2015 ata_mode_string(xfer_mask
),
2019 /* determine max_sectors */
2020 dev
->max_sectors
= ATA_MAX_SECTORS
;
2021 if (dev
->flags
& ATA_DFLAG_LBA48
)
2022 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2024 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2025 /* Let the user know. We don't want to disallow opens for
2026 rescue purposes, or in case the vendor is just a blithering
2029 ata_dev_printk(dev
, KERN_WARNING
,
2030 "Drive reports diagnostics failure. This may indicate a drive\n");
2031 ata_dev_printk(dev
, KERN_WARNING
,
2032 "fault or invalid emulation. Contact drive vendor for information.\n");
2036 /* limit bridge transfers to udma5, 200 sectors */
2037 if (ata_dev_knobble(dev
)) {
2038 if (ata_msg_drv(ap
) && print_info
)
2039 ata_dev_printk(dev
, KERN_INFO
,
2040 "applying bridge limits\n");
2041 dev
->udma_mask
&= ATA_UDMA5
;
2042 dev
->max_sectors
= ATA_MAX_SECTORS
;
2045 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_MAX_SEC_128
)
2046 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2049 /* limit ATAPI DMA to R/W commands only */
2050 if (ata_device_blacklisted(dev
) & ATA_HORKAGE_DMA_RW_ONLY
)
2051 dev
->horkage
|= ATA_HORKAGE_DMA_RW_ONLY
;
2053 if (ap
->ops
->dev_config
)
2054 ap
->ops
->dev_config(dev
);
2056 if (ata_msg_probe(ap
))
2057 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2058 __FUNCTION__
, ata_chk_status(ap
));
2062 if (ata_msg_probe(ap
))
2063 ata_dev_printk(dev
, KERN_DEBUG
,
2064 "%s: EXIT, err\n", __FUNCTION__
);
2069 * ata_cable_40wire - return 40 wire cable type
2072 * Helper method for drivers which want to hardwire 40 wire cable
2076 int ata_cable_40wire(struct ata_port
*ap
)
2078 return ATA_CBL_PATA40
;
2082 * ata_cable_80wire - return 80 wire cable type
2085 * Helper method for drivers which want to hardwire 80 wire cable
2089 int ata_cable_80wire(struct ata_port
*ap
)
2091 return ATA_CBL_PATA80
;
2095 * ata_cable_unknown - return unknown PATA cable.
2098 * Helper method for drivers which have no PATA cable detection.
2101 int ata_cable_unknown(struct ata_port
*ap
)
2103 return ATA_CBL_PATA_UNK
;
2107 * ata_cable_sata - return SATA cable type
2110 * Helper method for drivers which have SATA cables
2113 int ata_cable_sata(struct ata_port
*ap
)
2115 return ATA_CBL_SATA
;
2119 * ata_bus_probe - Reset and probe ATA bus
2122 * Master ATA bus probing function. Initiates a hardware-dependent
2123 * bus reset, then attempts to identify any devices found on
2127 * PCI/etc. bus probe sem.
2130 * Zero on success, negative errno otherwise.
2133 int ata_bus_probe(struct ata_port
*ap
)
2135 unsigned int classes
[ATA_MAX_DEVICES
];
2136 int tries
[ATA_MAX_DEVICES
];
2138 struct ata_device
*dev
;
2142 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2143 tries
[i
] = ATA_PROBE_MAX_TRIES
;
2146 /* reset and determine device classes */
2147 ap
->ops
->phy_reset(ap
);
2149 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2150 dev
= &ap
->device
[i
];
2152 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2153 dev
->class != ATA_DEV_UNKNOWN
)
2154 classes
[dev
->devno
] = dev
->class;
2156 classes
[dev
->devno
] = ATA_DEV_NONE
;
2158 dev
->class = ATA_DEV_UNKNOWN
;
2163 /* after the reset the device state is PIO 0 and the controller
2164 state is undefined. Record the mode */
2166 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2167 ap
->device
[i
].pio_mode
= XFER_PIO_0
;
2169 /* read IDENTIFY page and configure devices. We have to do the identify
2170 specific sequence bass-ackwards so that PDIAG- is released by
2173 for (i
= ATA_MAX_DEVICES
- 1; i
>= 0; i
--) {
2174 dev
= &ap
->device
[i
];
2177 dev
->class = classes
[i
];
2179 if (!ata_dev_enabled(dev
))
2182 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2188 /* Now ask for the cable type as PDIAG- should have been released */
2189 if (ap
->ops
->cable_detect
)
2190 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2192 /* After the identify sequence we can now set up the devices. We do
2193 this in the normal order so that the user doesn't get confused */
2195 for(i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2196 dev
= &ap
->device
[i
];
2197 if (!ata_dev_enabled(dev
))
2200 ap
->eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2201 rc
= ata_dev_configure(dev
);
2202 ap
->eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2207 /* configure transfer mode */
2208 rc
= ata_set_mode(ap
, &dev
);
2212 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2213 if (ata_dev_enabled(&ap
->device
[i
]))
2216 /* no device present, disable port */
2217 ata_port_disable(ap
);
2218 ap
->ops
->port_disable(ap
);
2222 tries
[dev
->devno
]--;
2226 /* eeek, something went very wrong, give up */
2227 tries
[dev
->devno
] = 0;
2231 /* give it just one more chance */
2232 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2234 if (tries
[dev
->devno
] == 1) {
2235 /* This is the last chance, better to slow
2236 * down than lose it.
2238 sata_down_spd_limit(ap
);
2239 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2243 if (!tries
[dev
->devno
])
2244 ata_dev_disable(dev
);
2250 * ata_port_probe - Mark port as enabled
2251 * @ap: Port for which we indicate enablement
2253 * Modify @ap data structure such that the system
2254 * thinks that the entire port is enabled.
2256 * LOCKING: host lock, or some other form of
2260 void ata_port_probe(struct ata_port
*ap
)
2262 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2266 * sata_print_link_status - Print SATA link status
2267 * @ap: SATA port to printk link status about
2269 * This function prints link speed and status of a SATA link.
2274 void sata_print_link_status(struct ata_port
*ap
)
2276 u32 sstatus
, scontrol
, tmp
;
2278 if (sata_scr_read(ap
, SCR_STATUS
, &sstatus
))
2280 sata_scr_read(ap
, SCR_CONTROL
, &scontrol
);
2282 if (ata_port_online(ap
)) {
2283 tmp
= (sstatus
>> 4) & 0xf;
2284 ata_port_printk(ap
, KERN_INFO
,
2285 "SATA link up %s (SStatus %X SControl %X)\n",
2286 sata_spd_string(tmp
), sstatus
, scontrol
);
2288 ata_port_printk(ap
, KERN_INFO
,
2289 "SATA link down (SStatus %X SControl %X)\n",
2295 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2296 * @ap: SATA port associated with target SATA PHY.
2298 * This function issues commands to standard SATA Sxxx
2299 * PHY registers, to wake up the phy (and device), and
2300 * clear any reset condition.
2303 * PCI/etc. bus probe sem.
2306 void __sata_phy_reset(struct ata_port
*ap
)
2309 unsigned long timeout
= jiffies
+ (HZ
* 5);
2311 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2312 /* issue phy wake/reset */
2313 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2314 /* Couldn't find anything in SATA I/II specs, but
2315 * AHCI-1.1 10.4.2 says at least 1 ms. */
2318 /* phy wake/clear reset */
2319 sata_scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2321 /* wait for phy to become ready, if necessary */
2324 sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2325 if ((sstatus
& 0xf) != 1)
2327 } while (time_before(jiffies
, timeout
));
2329 /* print link status */
2330 sata_print_link_status(ap
);
2332 /* TODO: phy layer with polling, timeouts, etc. */
2333 if (!ata_port_offline(ap
))
2336 ata_port_disable(ap
);
2338 if (ap
->flags
& ATA_FLAG_DISABLED
)
2341 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2342 ata_port_disable(ap
);
2346 ap
->cbl
= ATA_CBL_SATA
;
2350 * sata_phy_reset - Reset SATA bus.
2351 * @ap: SATA port associated with target SATA PHY.
2353 * This function resets the SATA bus, and then probes
2354 * the bus for devices.
2357 * PCI/etc. bus probe sem.
2360 void sata_phy_reset(struct ata_port
*ap
)
2362 __sata_phy_reset(ap
);
2363 if (ap
->flags
& ATA_FLAG_DISABLED
)
2369 * ata_dev_pair - return other device on cable
2372 * Obtain the other device on the same cable, or if none is
2373 * present NULL is returned
2376 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2378 struct ata_port
*ap
= adev
->ap
;
2379 struct ata_device
*pair
= &ap
->device
[1 - adev
->devno
];
2380 if (!ata_dev_enabled(pair
))
2386 * ata_port_disable - Disable port.
2387 * @ap: Port to be disabled.
2389 * Modify @ap data structure such that the system
2390 * thinks that the entire port is disabled, and should
2391 * never attempt to probe or communicate with devices
2394 * LOCKING: host lock, or some other form of
2398 void ata_port_disable(struct ata_port
*ap
)
2400 ap
->device
[0].class = ATA_DEV_NONE
;
2401 ap
->device
[1].class = ATA_DEV_NONE
;
2402 ap
->flags
|= ATA_FLAG_DISABLED
;
2406 * sata_down_spd_limit - adjust SATA spd limit downward
2407 * @ap: Port to adjust SATA spd limit for
2409 * Adjust SATA spd limit of @ap downward. Note that this
2410 * function only adjusts the limit. The change must be applied
2411 * using sata_set_spd().
2414 * Inherited from caller.
2417 * 0 on success, negative errno on failure
2419 int sata_down_spd_limit(struct ata_port
*ap
)
2421 u32 sstatus
, spd
, mask
;
2424 rc
= sata_scr_read(ap
, SCR_STATUS
, &sstatus
);
2428 mask
= ap
->sata_spd_limit
;
2431 highbit
= fls(mask
) - 1;
2432 mask
&= ~(1 << highbit
);
2434 spd
= (sstatus
>> 4) & 0xf;
2438 mask
&= (1 << spd
) - 1;
2442 ap
->sata_spd_limit
= mask
;
2444 ata_port_printk(ap
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2445 sata_spd_string(fls(mask
)));
2450 static int __sata_set_spd_needed(struct ata_port
*ap
, u32
*scontrol
)
2454 if (ap
->sata_spd_limit
== UINT_MAX
)
2457 limit
= fls(ap
->sata_spd_limit
);
2459 spd
= (*scontrol
>> 4) & 0xf;
2460 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2462 return spd
!= limit
;
2466 * sata_set_spd_needed - is SATA spd configuration needed
2467 * @ap: Port in question
2469 * Test whether the spd limit in SControl matches
2470 * @ap->sata_spd_limit. This function is used to determine
2471 * whether hardreset is necessary to apply SATA spd
2475 * Inherited from caller.
2478 * 1 if SATA spd configuration is needed, 0 otherwise.
2480 int sata_set_spd_needed(struct ata_port
*ap
)
2484 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
))
2487 return __sata_set_spd_needed(ap
, &scontrol
);
2491 * sata_set_spd - set SATA spd according to spd limit
2492 * @ap: Port to set SATA spd for
2494 * Set SATA spd of @ap according to sata_spd_limit.
2497 * Inherited from caller.
2500 * 0 if spd doesn't need to be changed, 1 if spd has been
2501 * changed. Negative errno if SCR registers are inaccessible.
2503 int sata_set_spd(struct ata_port
*ap
)
2508 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
2511 if (!__sata_set_spd_needed(ap
, &scontrol
))
2514 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
2521 * This mode timing computation functionality is ported over from
2522 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2525 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2526 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2527 * for UDMA6, which is currently supported only by Maxtor drives.
2529 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2532 static const struct ata_timing ata_timing
[] = {
2534 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2535 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2536 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2537 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2539 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2540 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2541 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2542 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2543 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2545 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2547 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2548 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2549 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2551 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2552 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2553 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2555 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2556 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2557 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2558 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2560 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2561 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2562 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2564 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2569 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2570 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2572 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2574 q
->setup
= EZ(t
->setup
* 1000, T
);
2575 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2576 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2577 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2578 q
->active
= EZ(t
->active
* 1000, T
);
2579 q
->recover
= EZ(t
->recover
* 1000, T
);
2580 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2581 q
->udma
= EZ(t
->udma
* 1000, UT
);
2584 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2585 struct ata_timing
*m
, unsigned int what
)
2587 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2588 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2589 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2590 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2591 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2592 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2593 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2594 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2597 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
2599 const struct ata_timing
*t
;
2601 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2602 if (t
->mode
== 0xFF)
2607 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2608 struct ata_timing
*t
, int T
, int UT
)
2610 const struct ata_timing
*s
;
2611 struct ata_timing p
;
2617 if (!(s
= ata_timing_find_mode(speed
)))
2620 memcpy(t
, s
, sizeof(*s
));
2623 * If the drive is an EIDE drive, it can tell us it needs extended
2624 * PIO/MW_DMA cycle timing.
2627 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2628 memset(&p
, 0, sizeof(p
));
2629 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2630 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2631 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2632 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2633 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2635 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2639 * Convert the timing to bus clock counts.
2642 ata_timing_quantize(t
, t
, T
, UT
);
2645 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2646 * S.M.A.R.T * and some other commands. We have to ensure that the
2647 * DMA cycle timing is slower/equal than the fastest PIO timing.
2650 if (speed
> XFER_PIO_6
) {
2651 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2652 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2656 * Lengthen active & recovery time so that cycle time is correct.
2659 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2660 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2661 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2664 if (t
->active
+ t
->recover
< t
->cycle
) {
2665 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2666 t
->recover
= t
->cycle
- t
->active
;
2669 /* In a few cases quantisation may produce enough errors to
2670 leave t->cycle too low for the sum of active and recovery
2671 if so we must correct this */
2672 if (t
->active
+ t
->recover
> t
->cycle
)
2673 t
->cycle
= t
->active
+ t
->recover
;
2679 * ata_down_xfermask_limit - adjust dev xfer masks downward
2680 * @dev: Device to adjust xfer masks
2681 * @sel: ATA_DNXFER_* selector
2683 * Adjust xfer masks of @dev downward. Note that this function
2684 * does not apply the change. Invoking ata_set_mode() afterwards
2685 * will apply the limit.
2688 * Inherited from caller.
2691 * 0 on success, negative errno on failure
2693 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2696 unsigned int orig_mask
, xfer_mask
;
2697 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2700 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2701 sel
&= ~ATA_DNXFER_QUIET
;
2703 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2706 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2709 case ATA_DNXFER_PIO
:
2710 highbit
= fls(pio_mask
) - 1;
2711 pio_mask
&= ~(1 << highbit
);
2714 case ATA_DNXFER_DMA
:
2716 highbit
= fls(udma_mask
) - 1;
2717 udma_mask
&= ~(1 << highbit
);
2720 } else if (mwdma_mask
) {
2721 highbit
= fls(mwdma_mask
) - 1;
2722 mwdma_mask
&= ~(1 << highbit
);
2728 case ATA_DNXFER_40C
:
2729 udma_mask
&= ATA_UDMA_MASK_40C
;
2732 case ATA_DNXFER_FORCE_PIO0
:
2734 case ATA_DNXFER_FORCE_PIO
:
2743 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
2745 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
2749 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
2750 snprintf(buf
, sizeof(buf
), "%s:%s",
2751 ata_mode_string(xfer_mask
),
2752 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
2754 snprintf(buf
, sizeof(buf
), "%s",
2755 ata_mode_string(xfer_mask
));
2757 ata_dev_printk(dev
, KERN_WARNING
,
2758 "limiting speed to %s\n", buf
);
2761 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
2767 static int ata_dev_set_mode(struct ata_device
*dev
)
2769 struct ata_eh_context
*ehc
= &dev
->ap
->eh_context
;
2770 unsigned int err_mask
;
2773 dev
->flags
&= ~ATA_DFLAG_PIO
;
2774 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
2775 dev
->flags
|= ATA_DFLAG_PIO
;
2777 err_mask
= ata_dev_set_xfermode(dev
);
2778 /* Old CFA may refuse this command, which is just fine */
2779 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
2780 err_mask
&= ~AC_ERR_DEV
;
2783 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
2784 "(err_mask=0x%x)\n", err_mask
);
2788 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
2789 rc
= ata_dev_revalidate(dev
, 0);
2790 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
2794 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2795 dev
->xfer_shift
, (int)dev
->xfer_mode
);
2797 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
2798 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
2803 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2804 * @ap: port on which timings will be programmed
2805 * @r_failed_dev: out paramter for failed device
2807 * Standard implementation of the function used to tune and set
2808 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2809 * ata_dev_set_mode() fails, pointer to the failing device is
2810 * returned in @r_failed_dev.
2813 * PCI/etc. bus probe sem.
2816 * 0 on success, negative errno otherwise
2819 int ata_do_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2821 struct ata_device
*dev
;
2822 int i
, rc
= 0, used_dma
= 0, found
= 0;
2825 /* step 1: calculate xfer_mask */
2826 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2827 unsigned int pio_mask
, dma_mask
;
2829 dev
= &ap
->device
[i
];
2831 if (!ata_dev_enabled(dev
))
2834 ata_dev_xfermask(dev
);
2836 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
2837 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
2838 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
2839 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
2848 /* step 2: always set host PIO timings */
2849 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2850 dev
= &ap
->device
[i
];
2851 if (!ata_dev_enabled(dev
))
2854 if (!dev
->pio_mode
) {
2855 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
2860 dev
->xfer_mode
= dev
->pio_mode
;
2861 dev
->xfer_shift
= ATA_SHIFT_PIO
;
2862 if (ap
->ops
->set_piomode
)
2863 ap
->ops
->set_piomode(ap
, dev
);
2866 /* step 3: set host DMA timings */
2867 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2868 dev
= &ap
->device
[i
];
2870 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
2873 dev
->xfer_mode
= dev
->dma_mode
;
2874 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
2875 if (ap
->ops
->set_dmamode
)
2876 ap
->ops
->set_dmamode(ap
, dev
);
2879 /* step 4: update devices' xfer mode */
2880 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2881 dev
= &ap
->device
[i
];
2883 /* don't update suspended devices' xfer mode */
2884 if (!ata_dev_enabled(dev
))
2887 rc
= ata_dev_set_mode(dev
);
2892 /* Record simplex status. If we selected DMA then the other
2893 * host channels are not permitted to do so.
2895 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
2896 ap
->host
->simplex_claimed
= ap
;
2900 *r_failed_dev
= dev
;
2905 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2906 * @ap: port on which timings will be programmed
2907 * @r_failed_dev: out paramter for failed device
2909 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2910 * ata_set_mode() fails, pointer to the failing device is
2911 * returned in @r_failed_dev.
2914 * PCI/etc. bus probe sem.
2917 * 0 on success, negative errno otherwise
2919 int ata_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
)
2921 /* has private set_mode? */
2922 if (ap
->ops
->set_mode
)
2923 return ap
->ops
->set_mode(ap
, r_failed_dev
);
2924 return ata_do_set_mode(ap
, r_failed_dev
);
2928 * ata_tf_to_host - issue ATA taskfile to host controller
2929 * @ap: port to which command is being issued
2930 * @tf: ATA taskfile register set
2932 * Issues ATA taskfile register set to ATA host controller,
2933 * with proper synchronization with interrupt handler and
2937 * spin_lock_irqsave(host lock)
2940 static inline void ata_tf_to_host(struct ata_port
*ap
,
2941 const struct ata_taskfile
*tf
)
2943 ap
->ops
->tf_load(ap
, tf
);
2944 ap
->ops
->exec_command(ap
, tf
);
2948 * ata_busy_sleep - sleep until BSY clears, or timeout
2949 * @ap: port containing status register to be polled
2950 * @tmout_pat: impatience timeout
2951 * @tmout: overall timeout
2953 * Sleep until ATA Status register bit BSY clears,
2954 * or a timeout occurs.
2957 * Kernel thread context (may sleep).
2960 * 0 on success, -errno otherwise.
2962 int ata_busy_sleep(struct ata_port
*ap
,
2963 unsigned long tmout_pat
, unsigned long tmout
)
2965 unsigned long timer_start
, timeout
;
2968 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2969 timer_start
= jiffies
;
2970 timeout
= timer_start
+ tmout_pat
;
2971 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2972 time_before(jiffies
, timeout
)) {
2974 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2977 if (status
!= 0xff && (status
& ATA_BUSY
))
2978 ata_port_printk(ap
, KERN_WARNING
,
2979 "port is slow to respond, please be patient "
2980 "(Status 0x%x)\n", status
);
2982 timeout
= timer_start
+ tmout
;
2983 while (status
!= 0xff && (status
& ATA_BUSY
) &&
2984 time_before(jiffies
, timeout
)) {
2986 status
= ata_chk_status(ap
);
2992 if (status
& ATA_BUSY
) {
2993 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
2994 "(%lu secs, Status 0x%x)\n",
2995 tmout
/ HZ
, status
);
3003 * ata_wait_ready - sleep until BSY clears, or timeout
3004 * @ap: port containing status register to be polled
3005 * @deadline: deadline jiffies for the operation
3007 * Sleep until ATA Status register bit BSY clears, or timeout
3011 * Kernel thread context (may sleep).
3014 * 0 on success, -errno otherwise.
3016 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3018 unsigned long start
= jiffies
;
3022 u8 status
= ata_chk_status(ap
);
3023 unsigned long now
= jiffies
;
3025 if (!(status
& ATA_BUSY
))
3027 if (!ata_port_online(ap
) && status
== 0xff)
3029 if (time_after(now
, deadline
))
3032 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3033 (deadline
- now
> 3 * HZ
)) {
3034 ata_port_printk(ap
, KERN_WARNING
,
3035 "port is slow to respond, please be patient "
3036 "(Status 0x%x)\n", status
);
3044 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3045 unsigned long deadline
)
3047 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3048 unsigned int dev0
= devmask
& (1 << 0);
3049 unsigned int dev1
= devmask
& (1 << 1);
3052 /* if device 0 was found in ata_devchk, wait for its
3056 rc
= ata_wait_ready(ap
, deadline
);
3064 /* if device 1 was found in ata_devchk, wait for register
3065 * access briefly, then wait for BSY to clear.
3070 ap
->ops
->dev_select(ap
, 1);
3072 /* Wait for register access. Some ATAPI devices fail
3073 * to set nsect/lbal after reset, so don't waste too
3074 * much time on it. We're gonna wait for !BSY anyway.
3076 for (i
= 0; i
< 2; i
++) {
3079 nsect
= ioread8(ioaddr
->nsect_addr
);
3080 lbal
= ioread8(ioaddr
->lbal_addr
);
3081 if ((nsect
== 1) && (lbal
== 1))
3083 msleep(50); /* give drive a breather */
3086 rc
= ata_wait_ready(ap
, deadline
);
3094 /* is all this really necessary? */
3095 ap
->ops
->dev_select(ap
, 0);
3097 ap
->ops
->dev_select(ap
, 1);
3099 ap
->ops
->dev_select(ap
, 0);
3104 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3105 unsigned long deadline
)
3107 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3109 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3111 /* software reset. causes dev0 to be selected */
3112 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3113 udelay(20); /* FIXME: flush */
3114 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3115 udelay(20); /* FIXME: flush */
3116 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3118 /* spec mandates ">= 2ms" before checking status.
3119 * We wait 150ms, because that was the magic delay used for
3120 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3121 * between when the ATA command register is written, and then
3122 * status is checked. Because waiting for "a while" before
3123 * checking status is fine, post SRST, we perform this magic
3124 * delay here as well.
3126 * Old drivers/ide uses the 2mS rule and then waits for ready
3130 /* Before we perform post reset processing we want to see if
3131 * the bus shows 0xFF because the odd clown forgets the D7
3132 * pulldown resistor.
3134 if (ata_check_status(ap
) == 0xFF)
3137 return ata_bus_post_reset(ap
, devmask
, deadline
);
3141 * ata_bus_reset - reset host port and associated ATA channel
3142 * @ap: port to reset
3144 * This is typically the first time we actually start issuing
3145 * commands to the ATA channel. We wait for BSY to clear, then
3146 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3147 * result. Determine what devices, if any, are on the channel
3148 * by looking at the device 0/1 error register. Look at the signature
3149 * stored in each device's taskfile registers, to determine if
3150 * the device is ATA or ATAPI.
3153 * PCI/etc. bus probe sem.
3154 * Obtains host lock.
3157 * Sets ATA_FLAG_DISABLED if bus reset fails.
3160 void ata_bus_reset(struct ata_port
*ap
)
3162 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3163 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3165 unsigned int dev0
, dev1
= 0, devmask
= 0;
3168 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3170 /* determine if device 0/1 are present */
3171 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3174 dev0
= ata_devchk(ap
, 0);
3176 dev1
= ata_devchk(ap
, 1);
3180 devmask
|= (1 << 0);
3182 devmask
|= (1 << 1);
3184 /* select device 0 again */
3185 ap
->ops
->dev_select(ap
, 0);
3187 /* issue bus reset */
3188 if (ap
->flags
& ATA_FLAG_SRST
) {
3189 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3190 if (rc
&& rc
!= -ENODEV
)
3195 * determine by signature whether we have ATA or ATAPI devices
3197 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
3198 if ((slave_possible
) && (err
!= 0x81))
3199 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
3201 /* re-enable interrupts */
3202 ap
->ops
->irq_on(ap
);
3204 /* is double-select really necessary? */
3205 if (ap
->device
[1].class != ATA_DEV_NONE
)
3206 ap
->ops
->dev_select(ap
, 1);
3207 if (ap
->device
[0].class != ATA_DEV_NONE
)
3208 ap
->ops
->dev_select(ap
, 0);
3210 /* if no devices were detected, disable this port */
3211 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
3212 (ap
->device
[1].class == ATA_DEV_NONE
))
3215 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3216 /* set up device control for ATA_FLAG_SATA_RESET */
3217 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3224 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3225 ap
->ops
->port_disable(ap
);
3231 * sata_phy_debounce - debounce SATA phy status
3232 * @ap: ATA port to debounce SATA phy status for
3233 * @params: timing parameters { interval, duratinon, timeout } in msec
3234 * @deadline: deadline jiffies for the operation
3236 * Make sure SStatus of @ap reaches stable state, determined by
3237 * holding the same value where DET is not 1 for @duration polled
3238 * every @interval, before @timeout. Timeout constraints the
3239 * beginning of the stable state. Because DET gets stuck at 1 on
3240 * some controllers after hot unplugging, this functions waits
3241 * until timeout then returns 0 if DET is stable at 1.
3243 * @timeout is further limited by @deadline. The sooner of the
3247 * Kernel thread context (may sleep)
3250 * 0 on success, -errno on failure.
3252 int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *params
,
3253 unsigned long deadline
)
3255 unsigned long interval_msec
= params
[0];
3256 unsigned long duration
= msecs_to_jiffies(params
[1]);
3257 unsigned long last_jiffies
, t
;
3261 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3262 if (time_before(t
, deadline
))
3265 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3270 last_jiffies
= jiffies
;
3273 msleep(interval_msec
);
3274 if ((rc
= sata_scr_read(ap
, SCR_STATUS
, &cur
)))
3280 if (cur
== 1 && time_before(jiffies
, deadline
))
3282 if (time_after(jiffies
, last_jiffies
+ duration
))
3287 /* unstable, start over */
3289 last_jiffies
= jiffies
;
3291 /* check deadline */
3292 if (time_after(jiffies
, deadline
))
3298 * sata_phy_resume - resume SATA phy
3299 * @ap: ATA port to resume SATA phy for
3300 * @params: timing parameters { interval, duratinon, timeout } in msec
3301 * @deadline: deadline jiffies for the operation
3303 * Resume SATA phy of @ap and debounce it.
3306 * Kernel thread context (may sleep)
3309 * 0 on success, -errno on failure.
3311 int sata_phy_resume(struct ata_port
*ap
, const unsigned long *params
,
3312 unsigned long deadline
)
3317 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3320 scontrol
= (scontrol
& 0x0f0) | 0x300;
3322 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3325 /* Some PHYs react badly if SStatus is pounded immediately
3326 * after resuming. Delay 200ms before debouncing.
3330 return sata_phy_debounce(ap
, params
, deadline
);
3334 * ata_std_prereset - prepare for reset
3335 * @ap: ATA port to be reset
3336 * @deadline: deadline jiffies for the operation
3338 * @ap is about to be reset. Initialize it. Failure from
3339 * prereset makes libata abort whole reset sequence and give up
3340 * that port, so prereset should be best-effort. It does its
3341 * best to prepare for reset sequence but if things go wrong, it
3342 * should just whine, not fail.
3345 * Kernel thread context (may sleep)
3348 * 0 on success, -errno otherwise.
3350 int ata_std_prereset(struct ata_port
*ap
, unsigned long deadline
)
3352 struct ata_eh_context
*ehc
= &ap
->eh_context
;
3353 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3356 /* handle link resume */
3357 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3358 (ap
->flags
& ATA_FLAG_HRST_TO_RESUME
))
3359 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3361 /* if we're about to do hardreset, nothing more to do */
3362 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3365 /* if SATA, resume phy */
3366 if (ap
->cbl
== ATA_CBL_SATA
) {
3367 rc
= sata_phy_resume(ap
, timing
, deadline
);
3368 /* whine about phy resume failure but proceed */
3369 if (rc
&& rc
!= -EOPNOTSUPP
)
3370 ata_port_printk(ap
, KERN_WARNING
, "failed to resume "
3371 "link for reset (errno=%d)\n", rc
);
3374 /* Wait for !BSY if the controller can wait for the first D2H
3375 * Reg FIS and we don't know that no device is attached.
3377 if (!(ap
->flags
& ATA_FLAG_SKIP_D2H_BSY
) && !ata_port_offline(ap
)) {
3378 rc
= ata_wait_ready(ap
, deadline
);
3379 if (rc
&& rc
!= -ENODEV
) {
3380 ata_port_printk(ap
, KERN_WARNING
, "device not ready "
3381 "(errno=%d), forcing hardreset\n", rc
);
3382 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3390 * ata_std_softreset - reset host port via ATA SRST
3391 * @ap: port to reset
3392 * @classes: resulting classes of attached devices
3393 * @deadline: deadline jiffies for the operation
3395 * Reset host port using ATA SRST.
3398 * Kernel thread context (may sleep)
3401 * 0 on success, -errno otherwise.
3403 int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
,
3404 unsigned long deadline
)
3406 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3407 unsigned int devmask
= 0;
3413 if (ata_port_offline(ap
)) {
3414 classes
[0] = ATA_DEV_NONE
;
3418 /* determine if device 0/1 are present */
3419 if (ata_devchk(ap
, 0))
3420 devmask
|= (1 << 0);
3421 if (slave_possible
&& ata_devchk(ap
, 1))
3422 devmask
|= (1 << 1);
3424 /* select device 0 again */
3425 ap
->ops
->dev_select(ap
, 0);
3427 /* issue bus reset */
3428 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3429 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3430 /* if link is occupied, -ENODEV too is an error */
3431 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(ap
))) {
3432 ata_port_printk(ap
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3436 /* determine by signature whether we have ATA or ATAPI devices */
3437 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
3438 if (slave_possible
&& err
!= 0x81)
3439 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
3442 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3447 * sata_port_hardreset - reset port via SATA phy reset
3448 * @ap: port to reset
3449 * @timing: timing parameters { interval, duratinon, timeout } in msec
3450 * @deadline: deadline jiffies for the operation
3452 * SATA phy-reset host port using DET bits of SControl register.
3455 * Kernel thread context (may sleep)
3458 * 0 on success, -errno otherwise.
3460 int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
,
3461 unsigned long deadline
)
3468 if (sata_set_spd_needed(ap
)) {
3469 /* SATA spec says nothing about how to reconfigure
3470 * spd. To be on the safe side, turn off phy during
3471 * reconfiguration. This works for at least ICH7 AHCI
3474 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3477 scontrol
= (scontrol
& 0x0f0) | 0x304;
3479 if ((rc
= sata_scr_write(ap
, SCR_CONTROL
, scontrol
)))
3485 /* issue phy wake/reset */
3486 if ((rc
= sata_scr_read(ap
, SCR_CONTROL
, &scontrol
)))
3489 scontrol
= (scontrol
& 0x0f0) | 0x301;
3491 if ((rc
= sata_scr_write_flush(ap
, SCR_CONTROL
, scontrol
)))
3494 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3495 * 10.4.2 says at least 1 ms.
3499 /* bring phy back */
3500 rc
= sata_phy_resume(ap
, timing
, deadline
);
3502 DPRINTK("EXIT, rc=%d\n", rc
);
3507 * sata_std_hardreset - reset host port via SATA phy reset
3508 * @ap: port to reset
3509 * @class: resulting class of attached device
3510 * @deadline: deadline jiffies for the operation
3512 * SATA phy-reset host port using DET bits of SControl register,
3513 * wait for !BSY and classify the attached device.
3516 * Kernel thread context (may sleep)
3519 * 0 on success, -errno otherwise.
3521 int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class,
3522 unsigned long deadline
)
3524 const unsigned long *timing
= sata_ehc_deb_timing(&ap
->eh_context
);
3530 rc
= sata_port_hardreset(ap
, timing
, deadline
);
3532 ata_port_printk(ap
, KERN_ERR
,
3533 "COMRESET failed (errno=%d)\n", rc
);
3537 /* TODO: phy layer with polling, timeouts, etc. */
3538 if (ata_port_offline(ap
)) {
3539 *class = ATA_DEV_NONE
;
3540 DPRINTK("EXIT, link offline\n");
3544 /* wait a while before checking status, see SRST for more info */
3547 rc
= ata_wait_ready(ap
, deadline
);
3548 /* link occupied, -ENODEV too is an error */
3550 ata_port_printk(ap
, KERN_ERR
,
3551 "COMRESET failed (errno=%d)\n", rc
);
3555 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3557 *class = ata_dev_try_classify(ap
, 0, NULL
);
3559 DPRINTK("EXIT, class=%u\n", *class);
3564 * ata_std_postreset - standard postreset callback
3565 * @ap: the target ata_port
3566 * @classes: classes of attached devices
3568 * This function is invoked after a successful reset. Note that
3569 * the device might have been reset more than once using
3570 * different reset methods before postreset is invoked.
3573 * Kernel thread context (may sleep)
3575 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
3581 /* print link status */
3582 sata_print_link_status(ap
);
3585 if (sata_scr_read(ap
, SCR_ERROR
, &serror
) == 0)
3586 sata_scr_write(ap
, SCR_ERROR
, serror
);
3588 /* re-enable interrupts */
3589 if (!ap
->ops
->error_handler
)
3590 ap
->ops
->irq_on(ap
);
3592 /* is double-select really necessary? */
3593 if (classes
[0] != ATA_DEV_NONE
)
3594 ap
->ops
->dev_select(ap
, 1);
3595 if (classes
[1] != ATA_DEV_NONE
)
3596 ap
->ops
->dev_select(ap
, 0);
3598 /* bail out if no device is present */
3599 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3600 DPRINTK("EXIT, no device\n");
3604 /* set up device control */
3605 if (ap
->ioaddr
.ctl_addr
)
3606 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3612 * ata_dev_same_device - Determine whether new ID matches configured device
3613 * @dev: device to compare against
3614 * @new_class: class of the new device
3615 * @new_id: IDENTIFY page of the new device
3617 * Compare @new_class and @new_id against @dev and determine
3618 * whether @dev is the device indicated by @new_class and
3625 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3627 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3630 const u16
*old_id
= dev
->id
;
3631 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3632 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3634 if (dev
->class != new_class
) {
3635 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3636 dev
->class, new_class
);
3640 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3641 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3642 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3643 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3645 if (strcmp(model
[0], model
[1])) {
3646 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3647 "'%s' != '%s'\n", model
[0], model
[1]);
3651 if (strcmp(serial
[0], serial
[1])) {
3652 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3653 "'%s' != '%s'\n", serial
[0], serial
[1]);
3661 * ata_dev_reread_id - Re-read IDENTIFY data
3662 * @adev: target ATA device
3663 * @readid_flags: read ID flags
3665 * Re-read IDENTIFY page and make sure @dev is still attached to
3669 * Kernel thread context (may sleep)
3672 * 0 on success, negative errno otherwise
3674 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3676 unsigned int class = dev
->class;
3677 u16
*id
= (void *)dev
->ap
->sector_buf
;
3681 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3685 /* is the device still there? */
3686 if (!ata_dev_same_device(dev
, class, id
))
3689 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3694 * ata_dev_revalidate - Revalidate ATA device
3695 * @dev: device to revalidate
3696 * @readid_flags: read ID flags
3698 * Re-read IDENTIFY page, make sure @dev is still attached to the
3699 * port and reconfigure it according to the new IDENTIFY page.
3702 * Kernel thread context (may sleep)
3705 * 0 on success, negative errno otherwise
3707 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int readid_flags
)
3709 u64 n_sectors
= dev
->n_sectors
;
3712 if (!ata_dev_enabled(dev
))
3716 rc
= ata_dev_reread_id(dev
, readid_flags
);
3720 /* configure device according to the new ID */
3721 rc
= ata_dev_configure(dev
);
3725 /* verify n_sectors hasn't changed */
3726 if (dev
->class == ATA_DEV_ATA
&& dev
->n_sectors
!= n_sectors
) {
3727 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3729 (unsigned long long)n_sectors
,
3730 (unsigned long long)dev
->n_sectors
);
3738 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3742 struct ata_blacklist_entry
{
3743 const char *model_num
;
3744 const char *model_rev
;
3745 unsigned long horkage
;
3748 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3749 /* Devices with DMA related problems under Linux */
3750 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3751 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3752 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3753 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3754 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3755 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3756 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3757 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3758 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3759 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3760 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3761 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3762 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3763 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3764 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3765 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3766 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3767 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3768 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3769 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3770 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3771 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3772 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3773 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3774 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3775 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3776 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3777 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3778 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA
},
3779 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3780 { "IOMEGA ZIP 250 ATAPI", NULL
, ATA_HORKAGE_NODMA
}, /* temporary fix */
3782 /* Weird ATAPI devices */
3783 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
|
3784 ATA_HORKAGE_DMA_RW_ONLY
},
3786 /* Devices we expect to fail diagnostics */
3788 /* Devices where NCQ should be avoided */
3790 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3791 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3792 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3794 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ
},
3795 { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ
},
3796 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3797 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ
},
3798 /* Blacklist entries taken from Silicon Image 3124/3132
3799 Windows driver .inf file - also several Linux problem reports */
3800 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3801 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3802 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3803 /* Drives which do spurious command completion */
3804 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
3805 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
3806 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3808 /* Devices with NCQ limits */
3814 unsigned long ata_device_blacklisted(const struct ata_device
*dev
)
3816 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3817 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3818 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3820 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3821 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3823 while (ad
->model_num
) {
3824 if (!strcmp(ad
->model_num
, model_num
)) {
3825 if (ad
->model_rev
== NULL
)
3827 if (!strcmp(ad
->model_rev
, model_rev
))
3835 static int ata_dma_blacklisted(const struct ata_device
*dev
)
3837 /* We don't support polling DMA.
3838 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3839 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3841 if ((dev
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
3842 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
3844 return (ata_device_blacklisted(dev
) & ATA_HORKAGE_NODMA
) ? 1 : 0;
3848 * ata_dev_xfermask - Compute supported xfermask of the given device
3849 * @dev: Device to compute xfermask for
3851 * Compute supported xfermask of @dev and store it in
3852 * dev->*_mask. This function is responsible for applying all
3853 * known limits including host controller limits, device
3859 static void ata_dev_xfermask(struct ata_device
*dev
)
3861 struct ata_port
*ap
= dev
->ap
;
3862 struct ata_host
*host
= ap
->host
;
3863 unsigned long xfer_mask
;
3865 /* controller modes available */
3866 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
3867 ap
->mwdma_mask
, ap
->udma_mask
);
3869 /* drive modes available */
3870 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
3871 dev
->mwdma_mask
, dev
->udma_mask
);
3872 xfer_mask
&= ata_id_xfermask(dev
->id
);
3875 * CFA Advanced TrueIDE timings are not allowed on a shared
3878 if (ata_dev_pair(dev
)) {
3879 /* No PIO5 or PIO6 */
3880 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
3881 /* No MWDMA3 or MWDMA 4 */
3882 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
3885 if (ata_dma_blacklisted(dev
)) {
3886 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3887 ata_dev_printk(dev
, KERN_WARNING
,
3888 "device is on DMA blacklist, disabling DMA\n");
3891 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
3892 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
3893 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
3894 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
3895 "other device, disabling DMA\n");
3898 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
3899 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
3901 if (ap
->ops
->mode_filter
)
3902 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
3904 /* Apply cable rule here. Don't apply it early because when
3905 * we handle hot plug the cable type can itself change.
3906 * Check this last so that we know if the transfer rate was
3907 * solely limited by the cable.
3908 * Unknown or 80 wire cables reported host side are checked
3909 * drive side as well. Cases where we know a 40wire cable
3910 * is used safely for 80 are not checked here.
3912 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
3913 /* UDMA/44 or higher would be available */
3914 if((ap
->cbl
== ATA_CBL_PATA40
) ||
3915 (ata_drive_40wire(dev
->id
) &&
3916 (ap
->cbl
== ATA_CBL_PATA_UNK
||
3917 ap
->cbl
== ATA_CBL_PATA80
))) {
3918 ata_dev_printk(dev
, KERN_WARNING
,
3919 "limited to UDMA/33 due to 40-wire cable\n");
3920 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
3923 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
3924 &dev
->mwdma_mask
, &dev
->udma_mask
);
3928 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3929 * @dev: Device to which command will be sent
3931 * Issue SET FEATURES - XFER MODE command to device @dev
3935 * PCI/etc. bus probe sem.
3938 * 0 on success, AC_ERR_* mask otherwise.
3941 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
3943 struct ata_taskfile tf
;
3944 unsigned int err_mask
;
3946 /* set up set-features taskfile */
3947 DPRINTK("set features - xfer mode\n");
3949 /* Some controllers and ATAPI devices show flaky interrupt
3950 * behavior after setting xfer mode. Use polling instead.
3952 ata_tf_init(dev
, &tf
);
3953 tf
.command
= ATA_CMD_SET_FEATURES
;
3954 tf
.feature
= SETFEATURES_XFER
;
3955 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
3956 tf
.protocol
= ATA_PROT_NODATA
;
3957 tf
.nsect
= dev
->xfer_mode
;
3959 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3961 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
3966 * ata_dev_init_params - Issue INIT DEV PARAMS command
3967 * @dev: Device to which command will be sent
3968 * @heads: Number of heads (taskfile parameter)
3969 * @sectors: Number of sectors (taskfile parameter)
3972 * Kernel thread context (may sleep)
3975 * 0 on success, AC_ERR_* mask otherwise.
3977 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
3978 u16 heads
, u16 sectors
)
3980 struct ata_taskfile tf
;
3981 unsigned int err_mask
;
3983 /* Number of sectors per track 1-255. Number of heads 1-16 */
3984 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
3985 return AC_ERR_INVALID
;
3987 /* set up init dev params taskfile */
3988 DPRINTK("init dev params \n");
3990 ata_tf_init(dev
, &tf
);
3991 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
3992 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3993 tf
.protocol
= ATA_PROT_NODATA
;
3995 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
3997 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0);
3999 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4004 * ata_sg_clean - Unmap DMA memory associated with command
4005 * @qc: Command containing DMA memory to be released
4007 * Unmap all mapped DMA memory associated with this command.
4010 * spin_lock_irqsave(host lock)
4012 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4014 struct ata_port
*ap
= qc
->ap
;
4015 struct scatterlist
*sg
= qc
->__sg
;
4016 int dir
= qc
->dma_dir
;
4017 void *pad_buf
= NULL
;
4019 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4020 WARN_ON(sg
== NULL
);
4022 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4023 WARN_ON(qc
->n_elem
> 1);
4025 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4027 /* if we padded the buffer out to 32-bit bound, and data
4028 * xfer direction is from-device, we must copy from the
4029 * pad buffer back into the supplied buffer
4031 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4032 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4034 if (qc
->flags
& ATA_QCFLAG_SG
) {
4036 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4037 /* restore last sg */
4038 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
4040 struct scatterlist
*psg
= &qc
->pad_sgent
;
4041 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4042 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4043 kunmap_atomic(addr
, KM_IRQ0
);
4047 dma_unmap_single(ap
->dev
,
4048 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4051 sg
->length
+= qc
->pad_len
;
4053 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4054 pad_buf
, qc
->pad_len
);
4057 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4062 * ata_fill_sg - Fill PCI IDE PRD table
4063 * @qc: Metadata associated with taskfile to be transferred
4065 * Fill PCI IDE PRD (scatter-gather) table with segments
4066 * associated with the current disk command.
4069 * spin_lock_irqsave(host lock)
4072 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4074 struct ata_port
*ap
= qc
->ap
;
4075 struct scatterlist
*sg
;
4078 WARN_ON(qc
->__sg
== NULL
);
4079 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4082 ata_for_each_sg(sg
, qc
) {
4086 /* determine if physical DMA addr spans 64K boundary.
4087 * Note h/w doesn't support 64-bit, so we unconditionally
4088 * truncate dma_addr_t to u32.
4090 addr
= (u32
) sg_dma_address(sg
);
4091 sg_len
= sg_dma_len(sg
);
4094 offset
= addr
& 0xffff;
4096 if ((offset
+ sg_len
) > 0x10000)
4097 len
= 0x10000 - offset
;
4099 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4100 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4101 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4110 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4113 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4114 * @qc: Metadata associated with taskfile to check
4116 * Allow low-level driver to filter ATA PACKET commands, returning
4117 * a status indicating whether or not it is OK to use DMA for the
4118 * supplied PACKET command.
4121 * spin_lock_irqsave(host lock)
4123 * RETURNS: 0 when ATAPI DMA can be used
4126 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4128 struct ata_port
*ap
= qc
->ap
;
4129 int rc
= 0; /* Assume ATAPI DMA is OK by default */
4131 /* some drives can only do ATAPI DMA on read/write */
4132 if (unlikely(qc
->dev
->horkage
& ATA_HORKAGE_DMA_RW_ONLY
)) {
4133 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
4134 u8
*scsicmd
= cmd
->cmnd
;
4136 switch (scsicmd
[0]) {
4143 /* atapi dma maybe ok */
4146 /* turn off atapi dma */
4151 if (ap
->ops
->check_atapi_dma
)
4152 rc
= ap
->ops
->check_atapi_dma(qc
);
4157 * ata_qc_prep - Prepare taskfile for submission
4158 * @qc: Metadata associated with taskfile to be prepared
4160 * Prepare ATA taskfile for submission.
4163 * spin_lock_irqsave(host lock)
4165 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4167 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4173 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4176 * ata_sg_init_one - Associate command with memory buffer
4177 * @qc: Command to be associated
4178 * @buf: Memory buffer
4179 * @buflen: Length of memory buffer, in bytes.
4181 * Initialize the data-related elements of queued_cmd @qc
4182 * to point to a single memory buffer, @buf of byte length @buflen.
4185 * spin_lock_irqsave(host lock)
4188 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4190 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4192 qc
->__sg
= &qc
->sgent
;
4194 qc
->orig_n_elem
= 1;
4196 qc
->nbytes
= buflen
;
4198 sg_init_one(&qc
->sgent
, buf
, buflen
);
4202 * ata_sg_init - Associate command with scatter-gather table.
4203 * @qc: Command to be associated
4204 * @sg: Scatter-gather table.
4205 * @n_elem: Number of elements in s/g table.
4207 * Initialize the data-related elements of queued_cmd @qc
4208 * to point to a scatter-gather table @sg, containing @n_elem
4212 * spin_lock_irqsave(host lock)
4215 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4216 unsigned int n_elem
)
4218 qc
->flags
|= ATA_QCFLAG_SG
;
4220 qc
->n_elem
= n_elem
;
4221 qc
->orig_n_elem
= n_elem
;
4225 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4226 * @qc: Command with memory buffer to be mapped.
4228 * DMA-map the memory buffer associated with queued_cmd @qc.
4231 * spin_lock_irqsave(host lock)
4234 * Zero on success, negative on error.
4237 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4239 struct ata_port
*ap
= qc
->ap
;
4240 int dir
= qc
->dma_dir
;
4241 struct scatterlist
*sg
= qc
->__sg
;
4242 dma_addr_t dma_address
;
4245 /* we must lengthen transfers to end on a 32-bit boundary */
4246 qc
->pad_len
= sg
->length
& 3;
4248 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4249 struct scatterlist
*psg
= &qc
->pad_sgent
;
4251 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4253 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4255 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4256 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4259 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4260 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4262 sg
->length
-= qc
->pad_len
;
4263 if (sg
->length
== 0)
4266 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4267 sg
->length
, qc
->pad_len
);
4275 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4277 if (dma_mapping_error(dma_address
)) {
4279 sg
->length
+= qc
->pad_len
;
4283 sg_dma_address(sg
) = dma_address
;
4284 sg_dma_len(sg
) = sg
->length
;
4287 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4288 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4294 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4295 * @qc: Command with scatter-gather table to be mapped.
4297 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4300 * spin_lock_irqsave(host lock)
4303 * Zero on success, negative on error.
4307 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4309 struct ata_port
*ap
= qc
->ap
;
4310 struct scatterlist
*sg
= qc
->__sg
;
4311 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
4312 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4314 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4315 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4317 /* we must lengthen transfers to end on a 32-bit boundary */
4318 qc
->pad_len
= lsg
->length
& 3;
4320 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4321 struct scatterlist
*psg
= &qc
->pad_sgent
;
4322 unsigned int offset
;
4324 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4326 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4329 * psg->page/offset are used to copy to-be-written
4330 * data in this function or read data in ata_sg_clean.
4332 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4333 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
4334 psg
->offset
= offset_in_page(offset
);
4336 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4337 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
4338 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4339 kunmap_atomic(addr
, KM_IRQ0
);
4342 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4343 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4345 lsg
->length
-= qc
->pad_len
;
4346 if (lsg
->length
== 0)
4349 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4350 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4353 pre_n_elem
= qc
->n_elem
;
4354 if (trim_sg
&& pre_n_elem
)
4363 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4365 /* restore last sg */
4366 lsg
->length
+= qc
->pad_len
;
4370 DPRINTK("%d sg elements mapped\n", n_elem
);
4373 qc
->n_elem
= n_elem
;
4379 * swap_buf_le16 - swap halves of 16-bit words in place
4380 * @buf: Buffer to swap
4381 * @buf_words: Number of 16-bit words in buffer.
4383 * Swap halves of 16-bit words if needed to convert from
4384 * little-endian byte order to native cpu byte order, or
4388 * Inherited from caller.
4390 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4395 for (i
= 0; i
< buf_words
; i
++)
4396 buf
[i
] = le16_to_cpu(buf
[i
]);
4397 #endif /* __BIG_ENDIAN */
4401 * ata_data_xfer - Transfer data by PIO
4402 * @adev: device to target
4404 * @buflen: buffer length
4405 * @write_data: read/write
4407 * Transfer data from/to the device data register by PIO.
4410 * Inherited from caller.
4412 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4413 unsigned int buflen
, int write_data
)
4415 struct ata_port
*ap
= adev
->ap
;
4416 unsigned int words
= buflen
>> 1;
4418 /* Transfer multiple of 2 bytes */
4420 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4422 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
4424 /* Transfer trailing 1 byte, if any. */
4425 if (unlikely(buflen
& 0x01)) {
4426 u16 align_buf
[1] = { 0 };
4427 unsigned char *trailing_buf
= buf
+ buflen
- 1;
4430 memcpy(align_buf
, trailing_buf
, 1);
4431 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
4433 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
4434 memcpy(trailing_buf
, align_buf
, 1);
4440 * ata_data_xfer_noirq - Transfer data by PIO
4441 * @adev: device to target
4443 * @buflen: buffer length
4444 * @write_data: read/write
4446 * Transfer data from/to the device data register by PIO. Do the
4447 * transfer with interrupts disabled.
4450 * Inherited from caller.
4452 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
4453 unsigned int buflen
, int write_data
)
4455 unsigned long flags
;
4456 local_irq_save(flags
);
4457 ata_data_xfer(adev
, buf
, buflen
, write_data
);
4458 local_irq_restore(flags
);
4463 * ata_pio_sector - Transfer a sector of data.
4464 * @qc: Command on going
4466 * Transfer qc->sect_size bytes of data from/to the ATA device.
4469 * Inherited from caller.
4472 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
4474 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4475 struct scatterlist
*sg
= qc
->__sg
;
4476 struct ata_port
*ap
= qc
->ap
;
4478 unsigned int offset
;
4481 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
4482 ap
->hsm_task_state
= HSM_ST_LAST
;
4484 page
= sg
[qc
->cursg
].page
;
4485 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
;
4487 /* get the current page and offset */
4488 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4489 offset
%= PAGE_SIZE
;
4491 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4493 if (PageHighMem(page
)) {
4494 unsigned long flags
;
4496 /* FIXME: use a bounce buffer */
4497 local_irq_save(flags
);
4498 buf
= kmap_atomic(page
, KM_IRQ0
);
4500 /* do the actual data transfer */
4501 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4503 kunmap_atomic(buf
, KM_IRQ0
);
4504 local_irq_restore(flags
);
4506 buf
= page_address(page
);
4507 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
4510 qc
->curbytes
+= qc
->sect_size
;
4511 qc
->cursg_ofs
+= qc
->sect_size
;
4513 if (qc
->cursg_ofs
== (&sg
[qc
->cursg
])->length
) {
4520 * ata_pio_sectors - Transfer one or many sectors.
4521 * @qc: Command on going
4523 * Transfer one or many sectors of data from/to the
4524 * ATA device for the DRQ request.
4527 * Inherited from caller.
4530 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
4532 if (is_multi_taskfile(&qc
->tf
)) {
4533 /* READ/WRITE MULTIPLE */
4536 WARN_ON(qc
->dev
->multi_count
== 0);
4538 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
4539 qc
->dev
->multi_count
);
4547 * atapi_send_cdb - Write CDB bytes to hardware
4548 * @ap: Port to which ATAPI device is attached.
4549 * @qc: Taskfile currently active
4551 * When device has indicated its readiness to accept
4552 * a CDB, this function is called. Send the CDB.
4558 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4561 DPRINTK("send cdb\n");
4562 WARN_ON(qc
->dev
->cdb_len
< 12);
4564 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
4565 ata_altstatus(ap
); /* flush */
4567 switch (qc
->tf
.protocol
) {
4568 case ATA_PROT_ATAPI
:
4569 ap
->hsm_task_state
= HSM_ST
;
4571 case ATA_PROT_ATAPI_NODATA
:
4572 ap
->hsm_task_state
= HSM_ST_LAST
;
4574 case ATA_PROT_ATAPI_DMA
:
4575 ap
->hsm_task_state
= HSM_ST_LAST
;
4576 /* initiate bmdma */
4577 ap
->ops
->bmdma_start(qc
);
4583 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4584 * @qc: Command on going
4585 * @bytes: number of bytes
4587 * Transfer Transfer data from/to the ATAPI device.
4590 * Inherited from caller.
4594 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
4596 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4597 struct scatterlist
*sg
= qc
->__sg
;
4598 struct ata_port
*ap
= qc
->ap
;
4601 unsigned int offset
, count
;
4603 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
4604 ap
->hsm_task_state
= HSM_ST_LAST
;
4607 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
4609 * The end of qc->sg is reached and the device expects
4610 * more data to transfer. In order not to overrun qc->sg
4611 * and fulfill length specified in the byte count register,
4612 * - for read case, discard trailing data from the device
4613 * - for write case, padding zero data to the device
4615 u16 pad_buf
[1] = { 0 };
4616 unsigned int words
= bytes
>> 1;
4619 if (words
) /* warning if bytes > 1 */
4620 ata_dev_printk(qc
->dev
, KERN_WARNING
,
4621 "%u bytes trailing data\n", bytes
);
4623 for (i
= 0; i
< words
; i
++)
4624 ap
->ops
->data_xfer(qc
->dev
, (unsigned char*)pad_buf
, 2, do_write
);
4626 ap
->hsm_task_state
= HSM_ST_LAST
;
4630 sg
= &qc
->__sg
[qc
->cursg
];
4633 offset
= sg
->offset
+ qc
->cursg_ofs
;
4635 /* get the current page and offset */
4636 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
4637 offset
%= PAGE_SIZE
;
4639 /* don't overrun current sg */
4640 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
4642 /* don't cross page boundaries */
4643 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
4645 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4647 if (PageHighMem(page
)) {
4648 unsigned long flags
;
4650 /* FIXME: use bounce buffer */
4651 local_irq_save(flags
);
4652 buf
= kmap_atomic(page
, KM_IRQ0
);
4654 /* do the actual data transfer */
4655 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4657 kunmap_atomic(buf
, KM_IRQ0
);
4658 local_irq_restore(flags
);
4660 buf
= page_address(page
);
4661 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
4665 qc
->curbytes
+= count
;
4666 qc
->cursg_ofs
+= count
;
4668 if (qc
->cursg_ofs
== sg
->length
) {
4678 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4679 * @qc: Command on going
4681 * Transfer Transfer data from/to the ATAPI device.
4684 * Inherited from caller.
4687 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
4689 struct ata_port
*ap
= qc
->ap
;
4690 struct ata_device
*dev
= qc
->dev
;
4691 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
4692 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
4694 /* Abuse qc->result_tf for temp storage of intermediate TF
4695 * here to save some kernel stack usage.
4696 * For normal completion, qc->result_tf is not relevant. For
4697 * error, qc->result_tf is later overwritten by ata_qc_complete().
4698 * So, the correctness of qc->result_tf is not affected.
4700 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
4701 ireason
= qc
->result_tf
.nsect
;
4702 bc_lo
= qc
->result_tf
.lbam
;
4703 bc_hi
= qc
->result_tf
.lbah
;
4704 bytes
= (bc_hi
<< 8) | bc_lo
;
4706 /* shall be cleared to zero, indicating xfer of data */
4707 if (ireason
& (1 << 0))
4710 /* make sure transfer direction matches expected */
4711 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
4712 if (do_write
!= i_write
)
4715 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
4717 __atapi_pio_bytes(qc
, bytes
);
4722 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
4723 qc
->err_mask
|= AC_ERR_HSM
;
4724 ap
->hsm_task_state
= HSM_ST_ERR
;
4728 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4729 * @ap: the target ata_port
4733 * 1 if ok in workqueue, 0 otherwise.
4736 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
4738 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
4741 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
4742 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
4743 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4746 if (is_atapi_taskfile(&qc
->tf
) &&
4747 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
4755 * ata_hsm_qc_complete - finish a qc running on standard HSM
4756 * @qc: Command to complete
4757 * @in_wq: 1 if called from workqueue, 0 otherwise
4759 * Finish @qc which is running on standard HSM.
4762 * If @in_wq is zero, spin_lock_irqsave(host lock).
4763 * Otherwise, none on entry and grabs host lock.
4765 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
4767 struct ata_port
*ap
= qc
->ap
;
4768 unsigned long flags
;
4770 if (ap
->ops
->error_handler
) {
4772 spin_lock_irqsave(ap
->lock
, flags
);
4774 /* EH might have kicked in while host lock is
4777 qc
= ata_qc_from_tag(ap
, qc
->tag
);
4779 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
4780 ap
->ops
->irq_on(ap
);
4781 ata_qc_complete(qc
);
4783 ata_port_freeze(ap
);
4786 spin_unlock_irqrestore(ap
->lock
, flags
);
4788 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
4789 ata_qc_complete(qc
);
4791 ata_port_freeze(ap
);
4795 spin_lock_irqsave(ap
->lock
, flags
);
4796 ap
->ops
->irq_on(ap
);
4797 ata_qc_complete(qc
);
4798 spin_unlock_irqrestore(ap
->lock
, flags
);
4800 ata_qc_complete(qc
);
4803 ata_altstatus(ap
); /* flush */
4807 * ata_hsm_move - move the HSM to the next state.
4808 * @ap: the target ata_port
4810 * @status: current device status
4811 * @in_wq: 1 if called from workqueue, 0 otherwise
4814 * 1 when poll next status needed, 0 otherwise.
4816 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
4817 u8 status
, int in_wq
)
4819 unsigned long flags
= 0;
4822 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
4824 /* Make sure ata_qc_issue_prot() does not throw things
4825 * like DMA polling into the workqueue. Notice that
4826 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4828 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
4831 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4832 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
4834 switch (ap
->hsm_task_state
) {
4836 /* Send first data block or PACKET CDB */
4838 /* If polling, we will stay in the work queue after
4839 * sending the data. Otherwise, interrupt handler
4840 * takes over after sending the data.
4842 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
4844 /* check device status */
4845 if (unlikely((status
& ATA_DRQ
) == 0)) {
4846 /* handle BSY=0, DRQ=0 as error */
4847 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4848 /* device stops HSM for abort/error */
4849 qc
->err_mask
|= AC_ERR_DEV
;
4851 /* HSM violation. Let EH handle this */
4852 qc
->err_mask
|= AC_ERR_HSM
;
4854 ap
->hsm_task_state
= HSM_ST_ERR
;
4858 /* Device should not ask for data transfer (DRQ=1)
4859 * when it finds something wrong.
4860 * We ignore DRQ here and stop the HSM by
4861 * changing hsm_task_state to HSM_ST_ERR and
4862 * let the EH abort the command or reset the device.
4864 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4865 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
4866 "error, dev_stat 0x%X\n", status
);
4867 qc
->err_mask
|= AC_ERR_HSM
;
4868 ap
->hsm_task_state
= HSM_ST_ERR
;
4872 /* Send the CDB (atapi) or the first data block (ata pio out).
4873 * During the state transition, interrupt handler shouldn't
4874 * be invoked before the data transfer is complete and
4875 * hsm_task_state is changed. Hence, the following locking.
4878 spin_lock_irqsave(ap
->lock
, flags
);
4880 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
4881 /* PIO data out protocol.
4882 * send first data block.
4885 /* ata_pio_sectors() might change the state
4886 * to HSM_ST_LAST. so, the state is changed here
4887 * before ata_pio_sectors().
4889 ap
->hsm_task_state
= HSM_ST
;
4890 ata_pio_sectors(qc
);
4891 ata_altstatus(ap
); /* flush */
4894 atapi_send_cdb(ap
, qc
);
4897 spin_unlock_irqrestore(ap
->lock
, flags
);
4899 /* if polling, ata_pio_task() handles the rest.
4900 * otherwise, interrupt handler takes over from here.
4905 /* complete command or read/write the data register */
4906 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
4907 /* ATAPI PIO protocol */
4908 if ((status
& ATA_DRQ
) == 0) {
4909 /* No more data to transfer or device error.
4910 * Device error will be tagged in HSM_ST_LAST.
4912 ap
->hsm_task_state
= HSM_ST_LAST
;
4916 /* Device should not ask for data transfer (DRQ=1)
4917 * when it finds something wrong.
4918 * We ignore DRQ here and stop the HSM by
4919 * changing hsm_task_state to HSM_ST_ERR and
4920 * let the EH abort the command or reset the device.
4922 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4923 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
4924 "device error, dev_stat 0x%X\n",
4926 qc
->err_mask
|= AC_ERR_HSM
;
4927 ap
->hsm_task_state
= HSM_ST_ERR
;
4931 atapi_pio_bytes(qc
);
4933 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
4934 /* bad ireason reported by device */
4938 /* ATA PIO protocol */
4939 if (unlikely((status
& ATA_DRQ
) == 0)) {
4940 /* handle BSY=0, DRQ=0 as error */
4941 if (likely(status
& (ATA_ERR
| ATA_DF
)))
4942 /* device stops HSM for abort/error */
4943 qc
->err_mask
|= AC_ERR_DEV
;
4945 /* HSM violation. Let EH handle this.
4946 * Phantom devices also trigger this
4947 * condition. Mark hint.
4949 qc
->err_mask
|= AC_ERR_HSM
|
4952 ap
->hsm_task_state
= HSM_ST_ERR
;
4956 /* For PIO reads, some devices may ask for
4957 * data transfer (DRQ=1) alone with ERR=1.
4958 * We respect DRQ here and transfer one
4959 * block of junk data before changing the
4960 * hsm_task_state to HSM_ST_ERR.
4962 * For PIO writes, ERR=1 DRQ=1 doesn't make
4963 * sense since the data block has been
4964 * transferred to the device.
4966 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
4967 /* data might be corrputed */
4968 qc
->err_mask
|= AC_ERR_DEV
;
4970 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
4971 ata_pio_sectors(qc
);
4973 status
= ata_wait_idle(ap
);
4976 if (status
& (ATA_BUSY
| ATA_DRQ
))
4977 qc
->err_mask
|= AC_ERR_HSM
;
4979 /* ata_pio_sectors() might change the
4980 * state to HSM_ST_LAST. so, the state
4981 * is changed after ata_pio_sectors().
4983 ap
->hsm_task_state
= HSM_ST_ERR
;
4987 ata_pio_sectors(qc
);
4989 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
4990 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
4993 status
= ata_wait_idle(ap
);
4998 ata_altstatus(ap
); /* flush */
5003 if (unlikely(!ata_ok(status
))) {
5004 qc
->err_mask
|= __ac_err_mask(status
);
5005 ap
->hsm_task_state
= HSM_ST_ERR
;
5009 /* no more data to transfer */
5010 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5011 ap
->print_id
, qc
->dev
->devno
, status
);
5013 WARN_ON(qc
->err_mask
);
5015 ap
->hsm_task_state
= HSM_ST_IDLE
;
5017 /* complete taskfile transaction */
5018 ata_hsm_qc_complete(qc
, in_wq
);
5024 /* make sure qc->err_mask is available to
5025 * know what's wrong and recover
5027 WARN_ON(qc
->err_mask
== 0);
5029 ap
->hsm_task_state
= HSM_ST_IDLE
;
5031 /* complete taskfile transaction */
5032 ata_hsm_qc_complete(qc
, in_wq
);
5044 static void ata_pio_task(struct work_struct
*work
)
5046 struct ata_port
*ap
=
5047 container_of(work
, struct ata_port
, port_task
.work
);
5048 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5053 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5056 * This is purely heuristic. This is a fast path.
5057 * Sometimes when we enter, BSY will be cleared in
5058 * a chk-status or two. If not, the drive is probably seeking
5059 * or something. Snooze for a couple msecs, then
5060 * chk-status again. If still busy, queue delayed work.
5062 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5063 if (status
& ATA_BUSY
) {
5065 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5066 if (status
& ATA_BUSY
) {
5067 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5073 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5075 /* another command or interrupt handler
5076 * may be running at this point.
5083 * ata_qc_new - Request an available ATA command, for queueing
5084 * @ap: Port associated with device @dev
5085 * @dev: Device from whom we request an available command structure
5091 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5093 struct ata_queued_cmd
*qc
= NULL
;
5096 /* no command while frozen */
5097 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5100 /* the last tag is reserved for internal command. */
5101 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5102 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5103 qc
= __ata_qc_from_tag(ap
, i
);
5114 * ata_qc_new_init - Request an available ATA command, and initialize it
5115 * @dev: Device from whom we request an available command structure
5121 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5123 struct ata_port
*ap
= dev
->ap
;
5124 struct ata_queued_cmd
*qc
;
5126 qc
= ata_qc_new(ap
);
5139 * ata_qc_free - free unused ata_queued_cmd
5140 * @qc: Command to complete
5142 * Designed to free unused ata_queued_cmd object
5143 * in case something prevents using it.
5146 * spin_lock_irqsave(host lock)
5148 void ata_qc_free(struct ata_queued_cmd
*qc
)
5150 struct ata_port
*ap
= qc
->ap
;
5153 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5157 if (likely(ata_tag_valid(tag
))) {
5158 qc
->tag
= ATA_TAG_POISON
;
5159 clear_bit(tag
, &ap
->qc_allocated
);
5163 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5165 struct ata_port
*ap
= qc
->ap
;
5167 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5168 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5170 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5173 /* command should be marked inactive atomically with qc completion */
5174 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
5175 ap
->sactive
&= ~(1 << qc
->tag
);
5177 ap
->active_tag
= ATA_TAG_POISON
;
5179 /* atapi: mark qc as inactive to prevent the interrupt handler
5180 * from completing the command twice later, before the error handler
5181 * is called. (when rc != 0 and atapi request sense is needed)
5183 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5184 ap
->qc_active
&= ~(1 << qc
->tag
);
5186 /* call completion callback */
5187 qc
->complete_fn(qc
);
5190 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5192 struct ata_port
*ap
= qc
->ap
;
5194 qc
->result_tf
.flags
= qc
->tf
.flags
;
5195 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5199 * ata_qc_complete - Complete an active ATA command
5200 * @qc: Command to complete
5201 * @err_mask: ATA Status register contents
5203 * Indicate to the mid and upper layers that an ATA
5204 * command has completed, with either an ok or not-ok status.
5207 * spin_lock_irqsave(host lock)
5209 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5211 struct ata_port
*ap
= qc
->ap
;
5213 /* XXX: New EH and old EH use different mechanisms to
5214 * synchronize EH with regular execution path.
5216 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5217 * Normal execution path is responsible for not accessing a
5218 * failed qc. libata core enforces the rule by returning NULL
5219 * from ata_qc_from_tag() for failed qcs.
5221 * Old EH depends on ata_qc_complete() nullifying completion
5222 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5223 * not synchronize with interrupt handler. Only PIO task is
5226 if (ap
->ops
->error_handler
) {
5227 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5229 if (unlikely(qc
->err_mask
))
5230 qc
->flags
|= ATA_QCFLAG_FAILED
;
5232 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5233 if (!ata_tag_internal(qc
->tag
)) {
5234 /* always fill result TF for failed qc */
5236 ata_qc_schedule_eh(qc
);
5241 /* read result TF if requested */
5242 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5245 __ata_qc_complete(qc
);
5247 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5250 /* read result TF if failed or requested */
5251 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5254 __ata_qc_complete(qc
);
5259 * ata_qc_complete_multiple - Complete multiple qcs successfully
5260 * @ap: port in question
5261 * @qc_active: new qc_active mask
5262 * @finish_qc: LLDD callback invoked before completing a qc
5264 * Complete in-flight commands. This functions is meant to be
5265 * called from low-level driver's interrupt routine to complete
5266 * requests normally. ap->qc_active and @qc_active is compared
5267 * and commands are completed accordingly.
5270 * spin_lock_irqsave(host lock)
5273 * Number of completed commands on success, -errno otherwise.
5275 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5276 void (*finish_qc
)(struct ata_queued_cmd
*))
5282 done_mask
= ap
->qc_active
^ qc_active
;
5284 if (unlikely(done_mask
& qc_active
)) {
5285 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5286 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5290 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5291 struct ata_queued_cmd
*qc
;
5293 if (!(done_mask
& (1 << i
)))
5296 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5299 ata_qc_complete(qc
);
5307 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5309 struct ata_port
*ap
= qc
->ap
;
5311 switch (qc
->tf
.protocol
) {
5314 case ATA_PROT_ATAPI_DMA
:
5317 case ATA_PROT_ATAPI
:
5319 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5332 * ata_qc_issue - issue taskfile to device
5333 * @qc: command to issue to device
5335 * Prepare an ATA command to submission to device.
5336 * This includes mapping the data into a DMA-able
5337 * area, filling in the S/G table, and finally
5338 * writing the taskfile to hardware, starting the command.
5341 * spin_lock_irqsave(host lock)
5343 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5345 struct ata_port
*ap
= qc
->ap
;
5347 /* Make sure only one non-NCQ command is outstanding. The
5348 * check is skipped for old EH because it reuses active qc to
5349 * request ATAPI sense.
5351 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(ap
->active_tag
));
5353 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5354 WARN_ON(ap
->sactive
& (1 << qc
->tag
));
5355 ap
->sactive
|= 1 << qc
->tag
;
5357 WARN_ON(ap
->sactive
);
5358 ap
->active_tag
= qc
->tag
;
5361 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5362 ap
->qc_active
|= 1 << qc
->tag
;
5364 if (ata_should_dma_map(qc
)) {
5365 if (qc
->flags
& ATA_QCFLAG_SG
) {
5366 if (ata_sg_setup(qc
))
5368 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5369 if (ata_sg_setup_one(qc
))
5373 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5376 ap
->ops
->qc_prep(qc
);
5378 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5379 if (unlikely(qc
->err_mask
))
5384 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5385 qc
->err_mask
|= AC_ERR_SYSTEM
;
5387 ata_qc_complete(qc
);
5391 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5392 * @qc: command to issue to device
5394 * Using various libata functions and hooks, this function
5395 * starts an ATA command. ATA commands are grouped into
5396 * classes called "protocols", and issuing each type of protocol
5397 * is slightly different.
5399 * May be used as the qc_issue() entry in ata_port_operations.
5402 * spin_lock_irqsave(host lock)
5405 * Zero on success, AC_ERR_* mask on failure
5408 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
5410 struct ata_port
*ap
= qc
->ap
;
5412 /* Use polling pio if the LLD doesn't handle
5413 * interrupt driven pio and atapi CDB interrupt.
5415 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
5416 switch (qc
->tf
.protocol
) {
5418 case ATA_PROT_NODATA
:
5419 case ATA_PROT_ATAPI
:
5420 case ATA_PROT_ATAPI_NODATA
:
5421 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
5423 case ATA_PROT_ATAPI_DMA
:
5424 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
5425 /* see ata_dma_blacklisted() */
5433 /* select the device */
5434 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
5436 /* start the command */
5437 switch (qc
->tf
.protocol
) {
5438 case ATA_PROT_NODATA
:
5439 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5440 ata_qc_set_polling(qc
);
5442 ata_tf_to_host(ap
, &qc
->tf
);
5443 ap
->hsm_task_state
= HSM_ST_LAST
;
5445 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5446 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5451 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5453 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5454 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5455 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
5456 ap
->hsm_task_state
= HSM_ST_LAST
;
5460 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5461 ata_qc_set_polling(qc
);
5463 ata_tf_to_host(ap
, &qc
->tf
);
5465 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
5466 /* PIO data out protocol */
5467 ap
->hsm_task_state
= HSM_ST_FIRST
;
5468 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5470 /* always send first data block using
5471 * the ata_pio_task() codepath.
5474 /* PIO data in protocol */
5475 ap
->hsm_task_state
= HSM_ST
;
5477 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5478 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5480 /* if polling, ata_pio_task() handles the rest.
5481 * otherwise, interrupt handler takes over from here.
5487 case ATA_PROT_ATAPI
:
5488 case ATA_PROT_ATAPI_NODATA
:
5489 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5490 ata_qc_set_polling(qc
);
5492 ata_tf_to_host(ap
, &qc
->tf
);
5494 ap
->hsm_task_state
= HSM_ST_FIRST
;
5496 /* send cdb by polling if no cdb interrupt */
5497 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
5498 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
5499 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5502 case ATA_PROT_ATAPI_DMA
:
5503 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5505 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
5506 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
5507 ap
->hsm_task_state
= HSM_ST_FIRST
;
5509 /* send cdb by polling if no cdb interrupt */
5510 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5511 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
5516 return AC_ERR_SYSTEM
;
5523 * ata_host_intr - Handle host interrupt for given (port, task)
5524 * @ap: Port on which interrupt arrived (possibly...)
5525 * @qc: Taskfile currently active in engine
5527 * Handle host interrupt for given queued command. Currently,
5528 * only DMA interrupts are handled. All other commands are
5529 * handled via polling with interrupts disabled (nIEN bit).
5532 * spin_lock_irqsave(host lock)
5535 * One if interrupt was handled, zero if not (shared irq).
5538 inline unsigned int ata_host_intr (struct ata_port
*ap
,
5539 struct ata_queued_cmd
*qc
)
5541 struct ata_eh_info
*ehi
= &ap
->eh_info
;
5542 u8 status
, host_stat
= 0;
5544 VPRINTK("ata%u: protocol %d task_state %d\n",
5545 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
5547 /* Check whether we are expecting interrupt in this state */
5548 switch (ap
->hsm_task_state
) {
5550 /* Some pre-ATAPI-4 devices assert INTRQ
5551 * at this state when ready to receive CDB.
5554 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5555 * The flag was turned on only for atapi devices.
5556 * No need to check is_atapi_taskfile(&qc->tf) again.
5558 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5562 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
5563 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
5564 /* check status of DMA engine */
5565 host_stat
= ap
->ops
->bmdma_status(ap
);
5566 VPRINTK("ata%u: host_stat 0x%X\n",
5567 ap
->print_id
, host_stat
);
5569 /* if it's not our irq... */
5570 if (!(host_stat
& ATA_DMA_INTR
))
5573 /* before we do anything else, clear DMA-Start bit */
5574 ap
->ops
->bmdma_stop(qc
);
5576 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
5577 /* error when transfering data to/from memory */
5578 qc
->err_mask
|= AC_ERR_HOST_BUS
;
5579 ap
->hsm_task_state
= HSM_ST_ERR
;
5589 /* check altstatus */
5590 status
= ata_altstatus(ap
);
5591 if (status
& ATA_BUSY
)
5594 /* check main status, clearing INTRQ */
5595 status
= ata_chk_status(ap
);
5596 if (unlikely(status
& ATA_BUSY
))
5599 /* ack bmdma irq events */
5600 ap
->ops
->irq_clear(ap
);
5602 ata_hsm_move(ap
, qc
, status
, 0);
5604 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
5605 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
5606 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
5608 return 1; /* irq handled */
5611 ap
->stats
.idle_irq
++;
5614 if ((ap
->stats
.idle_irq
% 1000) == 0) {
5615 ap
->ops
->irq_ack(ap
, 0); /* debug trap */
5616 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
5620 return 0; /* irq not handled */
5624 * ata_interrupt - Default ATA host interrupt handler
5625 * @irq: irq line (unused)
5626 * @dev_instance: pointer to our ata_host information structure
5628 * Default interrupt handler for PCI IDE devices. Calls
5629 * ata_host_intr() for each port that is not disabled.
5632 * Obtains host lock during operation.
5635 * IRQ_NONE or IRQ_HANDLED.
5638 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
)
5640 struct ata_host
*host
= dev_instance
;
5642 unsigned int handled
= 0;
5643 unsigned long flags
;
5645 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5646 spin_lock_irqsave(&host
->lock
, flags
);
5648 for (i
= 0; i
< host
->n_ports
; i
++) {
5649 struct ata_port
*ap
;
5651 ap
= host
->ports
[i
];
5653 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
5654 struct ata_queued_cmd
*qc
;
5656 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
5657 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
5658 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
5659 handled
|= ata_host_intr(ap
, qc
);
5663 spin_unlock_irqrestore(&host
->lock
, flags
);
5665 return IRQ_RETVAL(handled
);
5669 * sata_scr_valid - test whether SCRs are accessible
5670 * @ap: ATA port to test SCR accessibility for
5672 * Test whether SCRs are accessible for @ap.
5678 * 1 if SCRs are accessible, 0 otherwise.
5680 int sata_scr_valid(struct ata_port
*ap
)
5682 return ap
->cbl
== ATA_CBL_SATA
&& ap
->ops
->scr_read
;
5686 * sata_scr_read - read SCR register of the specified port
5687 * @ap: ATA port to read SCR for
5689 * @val: Place to store read value
5691 * Read SCR register @reg of @ap into *@val. This function is
5692 * guaranteed to succeed if the cable type of the port is SATA
5693 * and the port implements ->scr_read.
5699 * 0 on success, negative errno on failure.
5701 int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
)
5703 if (sata_scr_valid(ap
)) {
5704 *val
= ap
->ops
->scr_read(ap
, reg
);
5711 * sata_scr_write - write SCR register of the specified port
5712 * @ap: ATA port to write SCR for
5713 * @reg: SCR to write
5714 * @val: value to write
5716 * Write @val to SCR register @reg of @ap. This function is
5717 * guaranteed to succeed if the cable type of the port is SATA
5718 * and the port implements ->scr_read.
5724 * 0 on success, negative errno on failure.
5726 int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
)
5728 if (sata_scr_valid(ap
)) {
5729 ap
->ops
->scr_write(ap
, reg
, val
);
5736 * sata_scr_write_flush - write SCR register of the specified port and flush
5737 * @ap: ATA port to write SCR for
5738 * @reg: SCR to write
5739 * @val: value to write
5741 * This function is identical to sata_scr_write() except that this
5742 * function performs flush after writing to the register.
5748 * 0 on success, negative errno on failure.
5750 int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
)
5752 if (sata_scr_valid(ap
)) {
5753 ap
->ops
->scr_write(ap
, reg
, val
);
5754 ap
->ops
->scr_read(ap
, reg
);
5761 * ata_port_online - test whether the given port is online
5762 * @ap: ATA port to test
5764 * Test whether @ap is online. Note that this function returns 0
5765 * if online status of @ap cannot be obtained, so
5766 * ata_port_online(ap) != !ata_port_offline(ap).
5772 * 1 if the port online status is available and online.
5774 int ata_port_online(struct ata_port
*ap
)
5778 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) == 0x3)
5784 * ata_port_offline - test whether the given port is offline
5785 * @ap: ATA port to test
5787 * Test whether @ap is offline. Note that this function returns
5788 * 0 if offline status of @ap cannot be obtained, so
5789 * ata_port_online(ap) != !ata_port_offline(ap).
5795 * 1 if the port offline status is available and offline.
5797 int ata_port_offline(struct ata_port
*ap
)
5801 if (!sata_scr_read(ap
, SCR_STATUS
, &sstatus
) && (sstatus
& 0xf) != 0x3)
5806 int ata_flush_cache(struct ata_device
*dev
)
5808 unsigned int err_mask
;
5811 if (!ata_try_flush_cache(dev
))
5814 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
5815 cmd
= ATA_CMD_FLUSH_EXT
;
5817 cmd
= ATA_CMD_FLUSH
;
5819 err_mask
= ata_do_simple_cmd(dev
, cmd
);
5821 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
5829 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5830 unsigned int action
, unsigned int ehi_flags
,
5833 unsigned long flags
;
5836 for (i
= 0; i
< host
->n_ports
; i
++) {
5837 struct ata_port
*ap
= host
->ports
[i
];
5839 /* Previous resume operation might still be in
5840 * progress. Wait for PM_PENDING to clear.
5842 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5843 ata_port_wait_eh(ap
);
5844 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5847 /* request PM ops to EH */
5848 spin_lock_irqsave(ap
->lock
, flags
);
5853 ap
->pm_result
= &rc
;
5856 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5857 ap
->eh_info
.action
|= action
;
5858 ap
->eh_info
.flags
|= ehi_flags
;
5860 ata_port_schedule_eh(ap
);
5862 spin_unlock_irqrestore(ap
->lock
, flags
);
5864 /* wait and check result */
5866 ata_port_wait_eh(ap
);
5867 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5877 * ata_host_suspend - suspend host
5878 * @host: host to suspend
5881 * Suspend @host. Actual operation is performed by EH. This
5882 * function requests EH to perform PM operations and waits for EH
5886 * Kernel thread context (may sleep).
5889 * 0 on success, -errno on failure.
5891 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5895 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5897 host
->dev
->power
.power_state
= mesg
;
5902 * ata_host_resume - resume host
5903 * @host: host to resume
5905 * Resume @host. Actual operation is performed by EH. This
5906 * function requests EH to perform PM operations and returns.
5907 * Note that all resume operations are performed parallely.
5910 * Kernel thread context (may sleep).
5912 void ata_host_resume(struct ata_host
*host
)
5914 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
5915 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5916 host
->dev
->power
.power_state
= PMSG_ON
;
5921 * ata_port_start - Set port up for dma.
5922 * @ap: Port to initialize
5924 * Called just after data structures for each port are
5925 * initialized. Allocates space for PRD table.
5927 * May be used as the port_start() entry in ata_port_operations.
5930 * Inherited from caller.
5932 int ata_port_start(struct ata_port
*ap
)
5934 struct device
*dev
= ap
->dev
;
5937 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5942 rc
= ata_pad_alloc(ap
, dev
);
5946 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
5947 (unsigned long long)ap
->prd_dma
);
5952 * ata_dev_init - Initialize an ata_device structure
5953 * @dev: Device structure to initialize
5955 * Initialize @dev in preparation for probing.
5958 * Inherited from caller.
5960 void ata_dev_init(struct ata_device
*dev
)
5962 struct ata_port
*ap
= dev
->ap
;
5963 unsigned long flags
;
5965 /* SATA spd limit is bound to the first device */
5966 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
5968 /* High bits of dev->flags are used to record warm plug
5969 * requests which occur asynchronously. Synchronize using
5972 spin_lock_irqsave(ap
->lock
, flags
);
5973 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5974 spin_unlock_irqrestore(ap
->lock
, flags
);
5976 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5977 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5978 dev
->pio_mask
= UINT_MAX
;
5979 dev
->mwdma_mask
= UINT_MAX
;
5980 dev
->udma_mask
= UINT_MAX
;
5984 * ata_port_alloc - allocate and initialize basic ATA port resources
5985 * @host: ATA host this allocated port belongs to
5987 * Allocate and initialize basic ATA port resources.
5990 * Allocate ATA port on success, NULL on failure.
5993 * Inherited from calling layer (may sleep).
5995 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5997 struct ata_port
*ap
;
6002 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6006 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6007 ap
->lock
= &host
->lock
;
6008 ap
->flags
= ATA_FLAG_DISABLED
;
6010 ap
->ctl
= ATA_DEVCTL_OBS
;
6012 ap
->dev
= host
->dev
;
6014 ap
->hw_sata_spd_limit
= UINT_MAX
;
6015 ap
->active_tag
= ATA_TAG_POISON
;
6016 ap
->last_ctl
= 0xFF;
6018 #if defined(ATA_VERBOSE_DEBUG)
6019 /* turn on all debugging levels */
6020 ap
->msg_enable
= 0x00FF;
6021 #elif defined(ATA_DEBUG)
6022 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6024 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6027 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6028 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6029 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6030 INIT_LIST_HEAD(&ap
->eh_done_q
);
6031 init_waitqueue_head(&ap
->eh_wait_q
);
6033 ap
->cbl
= ATA_CBL_NONE
;
6035 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6036 struct ata_device
*dev
= &ap
->device
[i
];
6043 ap
->stats
.unhandled_irq
= 1;
6044 ap
->stats
.idle_irq
= 1;
6049 static void ata_host_release(struct device
*gendev
, void *res
)
6051 struct ata_host
*host
= dev_get_drvdata(gendev
);
6054 for (i
= 0; i
< host
->n_ports
; i
++) {
6055 struct ata_port
*ap
= host
->ports
[i
];
6060 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6061 ap
->ops
->port_stop(ap
);
6064 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6065 host
->ops
->host_stop(host
);
6067 for (i
= 0; i
< host
->n_ports
; i
++) {
6068 struct ata_port
*ap
= host
->ports
[i
];
6074 scsi_host_put(ap
->scsi_host
);
6077 host
->ports
[i
] = NULL
;
6080 dev_set_drvdata(gendev
, NULL
);
6084 * ata_host_alloc - allocate and init basic ATA host resources
6085 * @dev: generic device this host is associated with
6086 * @max_ports: maximum number of ATA ports associated with this host
6088 * Allocate and initialize basic ATA host resources. LLD calls
6089 * this function to allocate a host, initializes it fully and
6090 * attaches it using ata_host_register().
6092 * @max_ports ports are allocated and host->n_ports is
6093 * initialized to @max_ports. The caller is allowed to decrease
6094 * host->n_ports before calling ata_host_register(). The unused
6095 * ports will be automatically freed on registration.
6098 * Allocate ATA host on success, NULL on failure.
6101 * Inherited from calling layer (may sleep).
6103 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6105 struct ata_host
*host
;
6111 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6114 /* alloc a container for our list of ATA ports (buses) */
6115 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6116 /* alloc a container for our list of ATA ports (buses) */
6117 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6121 devres_add(dev
, host
);
6122 dev_set_drvdata(dev
, host
);
6124 spin_lock_init(&host
->lock
);
6126 host
->n_ports
= max_ports
;
6128 /* allocate ports bound to this host */
6129 for (i
= 0; i
< max_ports
; i
++) {
6130 struct ata_port
*ap
;
6132 ap
= ata_port_alloc(host
);
6137 host
->ports
[i
] = ap
;
6140 devres_remove_group(dev
, NULL
);
6144 devres_release_group(dev
, NULL
);
6149 * ata_host_alloc_pinfo - alloc host and init with port_info array
6150 * @dev: generic device this host is associated with
6151 * @ppi: array of ATA port_info to initialize host with
6152 * @n_ports: number of ATA ports attached to this host
6154 * Allocate ATA host and initialize with info from @ppi. If NULL
6155 * terminated, @ppi may contain fewer entries than @n_ports. The
6156 * last entry will be used for the remaining ports.
6159 * Allocate ATA host on success, NULL on failure.
6162 * Inherited from calling layer (may sleep).
6164 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6165 const struct ata_port_info
* const * ppi
,
6168 const struct ata_port_info
*pi
;
6169 struct ata_host
*host
;
6172 host
= ata_host_alloc(dev
, n_ports
);
6176 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6177 struct ata_port
*ap
= host
->ports
[i
];
6182 ap
->pio_mask
= pi
->pio_mask
;
6183 ap
->mwdma_mask
= pi
->mwdma_mask
;
6184 ap
->udma_mask
= pi
->udma_mask
;
6185 ap
->flags
|= pi
->flags
;
6186 ap
->ops
= pi
->port_ops
;
6188 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6189 host
->ops
= pi
->port_ops
;
6190 if (!host
->private_data
&& pi
->private_data
)
6191 host
->private_data
= pi
->private_data
;
6198 * ata_host_start - start and freeze ports of an ATA host
6199 * @host: ATA host to start ports for
6201 * Start and then freeze ports of @host. Started status is
6202 * recorded in host->flags, so this function can be called
6203 * multiple times. Ports are guaranteed to get started only
6204 * once. If host->ops isn't initialized yet, its set to the
6205 * first non-dummy port ops.
6208 * Inherited from calling layer (may sleep).
6211 * 0 if all ports are started successfully, -errno otherwise.
6213 int ata_host_start(struct ata_host
*host
)
6217 if (host
->flags
& ATA_HOST_STARTED
)
6220 for (i
= 0; i
< host
->n_ports
; i
++) {
6221 struct ata_port
*ap
= host
->ports
[i
];
6223 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6224 host
->ops
= ap
->ops
;
6226 if (ap
->ops
->port_start
) {
6227 rc
= ap
->ops
->port_start(ap
);
6229 ata_port_printk(ap
, KERN_ERR
, "failed to "
6230 "start port (errno=%d)\n", rc
);
6235 ata_eh_freeze_port(ap
);
6238 host
->flags
|= ATA_HOST_STARTED
;
6243 struct ata_port
*ap
= host
->ports
[i
];
6245 if (ap
->ops
->port_stop
)
6246 ap
->ops
->port_stop(ap
);
6252 * ata_sas_host_init - Initialize a host struct
6253 * @host: host to initialize
6254 * @dev: device host is attached to
6255 * @flags: host flags
6259 * PCI/etc. bus probe sem.
6262 /* KILLME - the only user left is ipr */
6263 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6264 unsigned long flags
, const struct ata_port_operations
*ops
)
6266 spin_lock_init(&host
->lock
);
6268 host
->flags
= flags
;
6273 * ata_host_register - register initialized ATA host
6274 * @host: ATA host to register
6275 * @sht: template for SCSI host
6277 * Register initialized ATA host. @host is allocated using
6278 * ata_host_alloc() and fully initialized by LLD. This function
6279 * starts ports, registers @host with ATA and SCSI layers and
6280 * probe registered devices.
6283 * Inherited from calling layer (may sleep).
6286 * 0 on success, -errno otherwise.
6288 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6292 /* host must have been started */
6293 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6294 dev_printk(KERN_ERR
, host
->dev
,
6295 "BUG: trying to register unstarted host\n");
6300 /* Blow away unused ports. This happens when LLD can't
6301 * determine the exact number of ports to allocate at
6304 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6305 kfree(host
->ports
[i
]);
6307 /* give ports names and add SCSI hosts */
6308 for (i
= 0; i
< host
->n_ports
; i
++)
6309 host
->ports
[i
]->print_id
= ata_print_id
++;
6311 rc
= ata_scsi_add_hosts(host
, sht
);
6315 /* set cable, sata_spd_limit and report */
6316 for (i
= 0; i
< host
->n_ports
; i
++) {
6317 struct ata_port
*ap
= host
->ports
[i
];
6320 unsigned long xfer_mask
;
6322 /* set SATA cable type if still unset */
6323 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6324 ap
->cbl
= ATA_CBL_SATA
;
6326 /* init sata_spd_limit to the current value */
6327 if (sata_scr_read(ap
, SCR_CONTROL
, &scontrol
) == 0) {
6328 int spd
= (scontrol
>> 4) & 0xf;
6330 ap
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6332 ap
->sata_spd_limit
= ap
->hw_sata_spd_limit
;
6334 /* report the secondary IRQ for second channel legacy */
6335 irq_line
= host
->irq
;
6336 if (i
== 1 && host
->irq2
)
6337 irq_line
= host
->irq2
;
6339 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6342 /* print per-port info to dmesg */
6343 if (!ata_port_is_dummy(ap
))
6344 ata_port_printk(ap
, KERN_INFO
, "%cATA max %s cmd 0x%p "
6345 "ctl 0x%p bmdma 0x%p irq %d\n",
6346 ap
->cbl
== ATA_CBL_SATA
? 'S' : 'P',
6347 ata_mode_string(xfer_mask
),
6348 ap
->ioaddr
.cmd_addr
,
6349 ap
->ioaddr
.ctl_addr
,
6350 ap
->ioaddr
.bmdma_addr
,
6353 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6356 /* perform each probe synchronously */
6357 DPRINTK("probe begin\n");
6358 for (i
= 0; i
< host
->n_ports
; i
++) {
6359 struct ata_port
*ap
= host
->ports
[i
];
6363 if (ap
->ops
->error_handler
) {
6364 struct ata_eh_info
*ehi
= &ap
->eh_info
;
6365 unsigned long flags
;
6369 /* kick EH for boot probing */
6370 spin_lock_irqsave(ap
->lock
, flags
);
6372 ehi
->probe_mask
= (1 << ATA_MAX_DEVICES
) - 1;
6373 ehi
->action
|= ATA_EH_SOFTRESET
;
6374 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6376 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6377 ap
->pflags
|= ATA_PFLAG_LOADING
;
6378 ata_port_schedule_eh(ap
);
6380 spin_unlock_irqrestore(ap
->lock
, flags
);
6382 /* wait for EH to finish */
6383 ata_port_wait_eh(ap
);
6385 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6386 rc
= ata_bus_probe(ap
);
6387 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6390 /* FIXME: do something useful here?
6391 * Current libata behavior will
6392 * tear down everything when
6393 * the module is removed
6394 * or the h/w is unplugged.
6400 /* probes are done, now scan each port's disk(s) */
6401 DPRINTK("host probe begin\n");
6402 for (i
= 0; i
< host
->n_ports
; i
++) {
6403 struct ata_port
*ap
= host
->ports
[i
];
6405 ata_scsi_scan_host(ap
);
6412 * ata_host_activate - start host, request IRQ and register it
6413 * @host: target ATA host
6414 * @irq: IRQ to request
6415 * @irq_handler: irq_handler used when requesting IRQ
6416 * @irq_flags: irq_flags used when requesting IRQ
6417 * @sht: scsi_host_template to use when registering the host
6419 * After allocating an ATA host and initializing it, most libata
6420 * LLDs perform three steps to activate the host - start host,
6421 * request IRQ and register it. This helper takes necessasry
6422 * arguments and performs the three steps in one go.
6425 * Inherited from calling layer (may sleep).
6428 * 0 on success, -errno otherwise.
6430 int ata_host_activate(struct ata_host
*host
, int irq
,
6431 irq_handler_t irq_handler
, unsigned long irq_flags
,
6432 struct scsi_host_template
*sht
)
6436 rc
= ata_host_start(host
);
6440 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6441 dev_driver_string(host
->dev
), host
);
6445 rc
= ata_host_register(host
, sht
);
6446 /* if failed, just free the IRQ and leave ports alone */
6448 devm_free_irq(host
->dev
, irq
, host
);
6450 /* Used to print device info at probe */
6457 * ata_port_detach - Detach ATA port in prepration of device removal
6458 * @ap: ATA port to be detached
6460 * Detach all ATA devices and the associated SCSI devices of @ap;
6461 * then, remove the associated SCSI host. @ap is guaranteed to
6462 * be quiescent on return from this function.
6465 * Kernel thread context (may sleep).
6467 void ata_port_detach(struct ata_port
*ap
)
6469 unsigned long flags
;
6472 if (!ap
->ops
->error_handler
)
6475 /* tell EH we're leaving & flush EH */
6476 spin_lock_irqsave(ap
->lock
, flags
);
6477 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6478 spin_unlock_irqrestore(ap
->lock
, flags
);
6480 ata_port_wait_eh(ap
);
6482 /* EH is now guaranteed to see UNLOADING, so no new device
6483 * will be attached. Disable all existing devices.
6485 spin_lock_irqsave(ap
->lock
, flags
);
6487 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
6488 ata_dev_disable(&ap
->device
[i
]);
6490 spin_unlock_irqrestore(ap
->lock
, flags
);
6492 /* Final freeze & EH. All in-flight commands are aborted. EH
6493 * will be skipped and retrials will be terminated with bad
6496 spin_lock_irqsave(ap
->lock
, flags
);
6497 ata_port_freeze(ap
); /* won't be thawed */
6498 spin_unlock_irqrestore(ap
->lock
, flags
);
6500 ata_port_wait_eh(ap
);
6502 /* Flush hotplug task. The sequence is similar to
6503 * ata_port_flush_task().
6505 cancel_work_sync(&ap
->hotplug_task
.work
); /* akpm: why? */
6506 cancel_delayed_work(&ap
->hotplug_task
);
6507 cancel_work_sync(&ap
->hotplug_task
.work
);
6510 /* remove the associated SCSI host */
6511 scsi_remove_host(ap
->scsi_host
);
6515 * ata_host_detach - Detach all ports of an ATA host
6516 * @host: Host to detach
6518 * Detach all ports of @host.
6521 * Kernel thread context (may sleep).
6523 void ata_host_detach(struct ata_host
*host
)
6527 for (i
= 0; i
< host
->n_ports
; i
++)
6528 ata_port_detach(host
->ports
[i
]);
6532 * ata_std_ports - initialize ioaddr with standard port offsets.
6533 * @ioaddr: IO address structure to be initialized
6535 * Utility function which initializes data_addr, error_addr,
6536 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6537 * device_addr, status_addr, and command_addr to standard offsets
6538 * relative to cmd_addr.
6540 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6543 void ata_std_ports(struct ata_ioports
*ioaddr
)
6545 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
6546 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
6547 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
6548 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
6549 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
6550 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
6551 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
6552 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
6553 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
6554 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
6561 * ata_pci_remove_one - PCI layer callback for device removal
6562 * @pdev: PCI device that was removed
6564 * PCI layer indicates to libata via this hook that hot-unplug or
6565 * module unload event has occurred. Detach all ports. Resource
6566 * release is handled via devres.
6569 * Inherited from PCI layer (may sleep).
6571 void ata_pci_remove_one(struct pci_dev
*pdev
)
6573 struct device
*dev
= pci_dev_to_dev(pdev
);
6574 struct ata_host
*host
= dev_get_drvdata(dev
);
6576 ata_host_detach(host
);
6579 /* move to PCI subsystem */
6580 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6582 unsigned long tmp
= 0;
6584 switch (bits
->width
) {
6587 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6593 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6599 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6610 return (tmp
== bits
->val
) ? 1 : 0;
6614 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6616 pci_save_state(pdev
);
6617 pci_disable_device(pdev
);
6619 if (mesg
.event
== PM_EVENT_SUSPEND
)
6620 pci_set_power_state(pdev
, PCI_D3hot
);
6623 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6627 pci_set_power_state(pdev
, PCI_D0
);
6628 pci_restore_state(pdev
);
6630 rc
= pcim_enable_device(pdev
);
6632 dev_printk(KERN_ERR
, &pdev
->dev
,
6633 "failed to enable device after resume (%d)\n", rc
);
6637 pci_set_master(pdev
);
6641 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6643 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6646 rc
= ata_host_suspend(host
, mesg
);
6650 ata_pci_device_do_suspend(pdev
, mesg
);
6655 int ata_pci_device_resume(struct pci_dev
*pdev
)
6657 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6660 rc
= ata_pci_device_do_resume(pdev
);
6662 ata_host_resume(host
);
6665 #endif /* CONFIG_PM */
6667 #endif /* CONFIG_PCI */
6670 static int __init
ata_init(void)
6672 ata_probe_timeout
*= HZ
;
6673 ata_wq
= create_workqueue("ata");
6677 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6679 destroy_workqueue(ata_wq
);
6683 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6687 static void __exit
ata_exit(void)
6689 destroy_workqueue(ata_wq
);
6690 destroy_workqueue(ata_aux_wq
);
6693 subsys_initcall(ata_init
);
6694 module_exit(ata_exit
);
6696 static unsigned long ratelimit_time
;
6697 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6699 int ata_ratelimit(void)
6702 unsigned long flags
;
6704 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6706 if (time_after(jiffies
, ratelimit_time
)) {
6708 ratelimit_time
= jiffies
+ (HZ
/5);
6712 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6718 * ata_wait_register - wait until register value changes
6719 * @reg: IO-mapped register
6720 * @mask: Mask to apply to read register value
6721 * @val: Wait condition
6722 * @interval_msec: polling interval in milliseconds
6723 * @timeout_msec: timeout in milliseconds
6725 * Waiting for some bits of register to change is a common
6726 * operation for ATA controllers. This function reads 32bit LE
6727 * IO-mapped register @reg and tests for the following condition.
6729 * (*@reg & mask) != val
6731 * If the condition is met, it returns; otherwise, the process is
6732 * repeated after @interval_msec until timeout.
6735 * Kernel thread context (may sleep)
6738 * The final register value.
6740 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6741 unsigned long interval_msec
,
6742 unsigned long timeout_msec
)
6744 unsigned long timeout
;
6747 tmp
= ioread32(reg
);
6749 /* Calculate timeout _after_ the first read to make sure
6750 * preceding writes reach the controller before starting to
6751 * eat away the timeout.
6753 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6755 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6756 msleep(interval_msec
);
6757 tmp
= ioread32(reg
);
6766 static void ata_dummy_noret(struct ata_port
*ap
) { }
6767 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6768 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6770 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6775 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6777 return AC_ERR_SYSTEM
;
6780 const struct ata_port_operations ata_dummy_port_ops
= {
6781 .port_disable
= ata_port_disable
,
6782 .check_status
= ata_dummy_check_status
,
6783 .check_altstatus
= ata_dummy_check_status
,
6784 .dev_select
= ata_noop_dev_select
,
6785 .qc_prep
= ata_noop_qc_prep
,
6786 .qc_issue
= ata_dummy_qc_issue
,
6787 .freeze
= ata_dummy_noret
,
6788 .thaw
= ata_dummy_noret
,
6789 .error_handler
= ata_dummy_noret
,
6790 .post_internal_cmd
= ata_dummy_qc_noret
,
6791 .irq_clear
= ata_dummy_noret
,
6792 .port_start
= ata_dummy_ret0
,
6793 .port_stop
= ata_dummy_noret
,
6796 const struct ata_port_info ata_dummy_port_info
= {
6797 .port_ops
= &ata_dummy_port_ops
,
6801 * libata is essentially a library of internal helper functions for
6802 * low-level ATA host controller drivers. As such, the API/ABI is
6803 * likely to change as new drivers are added and updated.
6804 * Do not depend on ABI/API stability.
6807 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6808 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6809 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6810 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6811 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6812 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6813 EXPORT_SYMBOL_GPL(ata_std_ports
);
6814 EXPORT_SYMBOL_GPL(ata_host_init
);
6815 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6816 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6817 EXPORT_SYMBOL_GPL(ata_host_start
);
6818 EXPORT_SYMBOL_GPL(ata_host_register
);
6819 EXPORT_SYMBOL_GPL(ata_host_activate
);
6820 EXPORT_SYMBOL_GPL(ata_host_detach
);
6821 EXPORT_SYMBOL_GPL(ata_sg_init
);
6822 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
6823 EXPORT_SYMBOL_GPL(ata_hsm_move
);
6824 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6825 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6826 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
6827 EXPORT_SYMBOL_GPL(ata_tf_load
);
6828 EXPORT_SYMBOL_GPL(ata_tf_read
);
6829 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6830 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
6831 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6832 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6833 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6834 EXPORT_SYMBOL_GPL(ata_check_status
);
6835 EXPORT_SYMBOL_GPL(ata_altstatus
);
6836 EXPORT_SYMBOL_GPL(ata_exec_command
);
6837 EXPORT_SYMBOL_GPL(ata_port_start
);
6838 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
6839 EXPORT_SYMBOL_GPL(ata_interrupt
);
6840 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6841 EXPORT_SYMBOL_GPL(ata_data_xfer
);
6842 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
6843 EXPORT_SYMBOL_GPL(ata_qc_prep
);
6844 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6845 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
6846 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
6847 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
6848 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
6849 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
6850 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
6851 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
6852 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
6853 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
6854 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
6855 EXPORT_SYMBOL_GPL(ata_port_probe
);
6856 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6857 EXPORT_SYMBOL_GPL(sata_set_spd
);
6858 EXPORT_SYMBOL_GPL(sata_phy_debounce
);
6859 EXPORT_SYMBOL_GPL(sata_phy_resume
);
6860 EXPORT_SYMBOL_GPL(sata_phy_reset
);
6861 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
6862 EXPORT_SYMBOL_GPL(ata_bus_reset
);
6863 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6864 EXPORT_SYMBOL_GPL(ata_std_softreset
);
6865 EXPORT_SYMBOL_GPL(sata_port_hardreset
);
6866 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6867 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6868 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6869 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6870 EXPORT_SYMBOL_GPL(ata_port_disable
);
6871 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6872 EXPORT_SYMBOL_GPL(ata_wait_register
);
6873 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
6874 EXPORT_SYMBOL_GPL(ata_wait_ready
);
6875 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
6876 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6877 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6878 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6879 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6880 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6881 EXPORT_SYMBOL_GPL(ata_host_intr
);
6882 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6883 EXPORT_SYMBOL_GPL(sata_scr_read
);
6884 EXPORT_SYMBOL_GPL(sata_scr_write
);
6885 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6886 EXPORT_SYMBOL_GPL(ata_port_online
);
6887 EXPORT_SYMBOL_GPL(ata_port_offline
);
6889 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6890 EXPORT_SYMBOL_GPL(ata_host_resume
);
6891 #endif /* CONFIG_PM */
6892 EXPORT_SYMBOL_GPL(ata_id_string
);
6893 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6894 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
6895 EXPORT_SYMBOL_GPL(ata_device_blacklisted
);
6896 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6898 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6899 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6900 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6903 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6904 EXPORT_SYMBOL_GPL(ata_pci_init_native_host
);
6905 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
6906 EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host
);
6907 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
6908 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6910 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6911 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6912 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6913 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6914 #endif /* CONFIG_PM */
6915 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
6916 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
6917 #endif /* CONFIG_PCI */
6919 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
6920 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6921 EXPORT_SYMBOL_GPL(ata_port_abort
);
6922 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6923 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6924 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6925 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6926 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6927 EXPORT_SYMBOL_GPL(ata_do_eh
);
6928 EXPORT_SYMBOL_GPL(ata_irq_on
);
6929 EXPORT_SYMBOL_GPL(ata_dummy_irq_on
);
6930 EXPORT_SYMBOL_GPL(ata_irq_ack
);
6931 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack
);
6932 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
6934 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6935 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6936 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6937 EXPORT_SYMBOL_GPL(ata_cable_sata
);