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/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/highmem.h>
50 #include <linux/spinlock.h>
51 #include <linux/blkdev.h>
52 #include <linux/delay.h>
53 #include <linux/timer.h>
54 #include <linux/interrupt.h>
55 #include <linux/completion.h>
56 #include <linux/suspend.h>
57 #include <linux/workqueue.h>
58 #include <linux/jiffies.h>
59 #include <linux/scatterlist.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_host.h>
64 #include <linux/libata.h>
65 #include <asm/semaphore.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
72 /* debounce timing parameters in msecs { interval, duration, timeout } */
73 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
74 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
75 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
77 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
78 u16 heads
, u16 sectors
);
79 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
80 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
81 u8 enable
, u8 feature
);
82 static void ata_dev_xfermask(struct ata_device
*dev
);
83 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
85 unsigned int ata_print_id
= 1;
86 static struct workqueue_struct
*ata_wq
;
88 struct workqueue_struct
*ata_aux_wq
;
90 int atapi_enabled
= 1;
91 module_param(atapi_enabled
, int, 0444);
92 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
95 module_param(atapi_dmadir
, int, 0444);
96 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
98 int atapi_passthru16
= 1;
99 module_param(atapi_passthru16
, int, 0444);
100 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
103 module_param_named(fua
, libata_fua
, int, 0444);
104 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
106 static int ata_ignore_hpa
;
107 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
108 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
110 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
111 module_param_named(dma
, libata_dma_mask
, int, 0444);
112 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
114 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
115 module_param(ata_probe_timeout
, int, 0444);
116 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
118 int libata_noacpi
= 0;
119 module_param_named(noacpi
, libata_noacpi
, int, 0444);
120 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
122 int libata_allow_tpm
= 0;
123 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
124 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
126 MODULE_AUTHOR("Jeff Garzik");
127 MODULE_DESCRIPTION("Library module for ATA devices");
128 MODULE_LICENSE("GPL");
129 MODULE_VERSION(DRV_VERSION
);
133 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
134 * @tf: Taskfile to convert
135 * @pmp: Port multiplier port
136 * @is_cmd: This FIS is for command
137 * @fis: Buffer into which data will output
139 * Converts a standard ATA taskfile to a Serial ATA
140 * FIS structure (Register - Host to Device).
143 * Inherited from caller.
145 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
147 fis
[0] = 0x27; /* Register - Host to Device FIS */
148 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
150 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
152 fis
[2] = tf
->command
;
153 fis
[3] = tf
->feature
;
160 fis
[8] = tf
->hob_lbal
;
161 fis
[9] = tf
->hob_lbam
;
162 fis
[10] = tf
->hob_lbah
;
163 fis
[11] = tf
->hob_feature
;
166 fis
[13] = tf
->hob_nsect
;
177 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
178 * @fis: Buffer from which data will be input
179 * @tf: Taskfile to output
181 * Converts a serial ATA FIS structure to a standard ATA taskfile.
184 * Inherited from caller.
187 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
189 tf
->command
= fis
[2]; /* status */
190 tf
->feature
= fis
[3]; /* error */
197 tf
->hob_lbal
= fis
[8];
198 tf
->hob_lbam
= fis
[9];
199 tf
->hob_lbah
= fis
[10];
202 tf
->hob_nsect
= fis
[13];
205 static const u8 ata_rw_cmds
[] = {
209 ATA_CMD_READ_MULTI_EXT
,
210 ATA_CMD_WRITE_MULTI_EXT
,
214 ATA_CMD_WRITE_MULTI_FUA_EXT
,
218 ATA_CMD_PIO_READ_EXT
,
219 ATA_CMD_PIO_WRITE_EXT
,
232 ATA_CMD_WRITE_FUA_EXT
236 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
237 * @tf: command to examine and configure
238 * @dev: device tf belongs to
240 * Examine the device configuration and tf->flags to calculate
241 * the proper read/write commands and protocol to use.
246 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
250 int index
, fua
, lba48
, write
;
252 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
253 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
254 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
256 if (dev
->flags
& ATA_DFLAG_PIO
) {
257 tf
->protocol
= ATA_PROT_PIO
;
258 index
= dev
->multi_count
? 0 : 8;
259 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
260 /* Unable to use DMA due to host limitation */
261 tf
->protocol
= ATA_PROT_PIO
;
262 index
= dev
->multi_count
? 0 : 8;
264 tf
->protocol
= ATA_PROT_DMA
;
268 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
277 * ata_tf_read_block - Read block address from ATA taskfile
278 * @tf: ATA taskfile of interest
279 * @dev: ATA device @tf belongs to
284 * Read block address from @tf. This function can handle all
285 * three address formats - LBA, LBA48 and CHS. tf->protocol and
286 * flags select the address format to use.
289 * Block address read from @tf.
291 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
295 if (tf
->flags
& ATA_TFLAG_LBA
) {
296 if (tf
->flags
& ATA_TFLAG_LBA48
) {
297 block
|= (u64
)tf
->hob_lbah
<< 40;
298 block
|= (u64
)tf
->hob_lbam
<< 32;
299 block
|= tf
->hob_lbal
<< 24;
301 block
|= (tf
->device
& 0xf) << 24;
303 block
|= tf
->lbah
<< 16;
304 block
|= tf
->lbam
<< 8;
309 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
310 head
= tf
->device
& 0xf;
313 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
320 * ata_build_rw_tf - Build ATA taskfile for given read/write request
321 * @tf: Target ATA taskfile
322 * @dev: ATA device @tf belongs to
323 * @block: Block address
324 * @n_block: Number of blocks
325 * @tf_flags: RW/FUA etc...
331 * Build ATA taskfile @tf for read/write request described by
332 * @block, @n_block, @tf_flags and @tag on @dev.
336 * 0 on success, -ERANGE if the request is too large for @dev,
337 * -EINVAL if the request is invalid.
339 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
340 u64 block
, u32 n_block
, unsigned int tf_flags
,
343 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
344 tf
->flags
|= tf_flags
;
346 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
348 if (!lba_48_ok(block
, n_block
))
351 tf
->protocol
= ATA_PROT_NCQ
;
352 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
354 if (tf
->flags
& ATA_TFLAG_WRITE
)
355 tf
->command
= ATA_CMD_FPDMA_WRITE
;
357 tf
->command
= ATA_CMD_FPDMA_READ
;
359 tf
->nsect
= tag
<< 3;
360 tf
->hob_feature
= (n_block
>> 8) & 0xff;
361 tf
->feature
= n_block
& 0xff;
363 tf
->hob_lbah
= (block
>> 40) & 0xff;
364 tf
->hob_lbam
= (block
>> 32) & 0xff;
365 tf
->hob_lbal
= (block
>> 24) & 0xff;
366 tf
->lbah
= (block
>> 16) & 0xff;
367 tf
->lbam
= (block
>> 8) & 0xff;
368 tf
->lbal
= block
& 0xff;
371 if (tf
->flags
& ATA_TFLAG_FUA
)
372 tf
->device
|= 1 << 7;
373 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
374 tf
->flags
|= ATA_TFLAG_LBA
;
376 if (lba_28_ok(block
, n_block
)) {
378 tf
->device
|= (block
>> 24) & 0xf;
379 } else if (lba_48_ok(block
, n_block
)) {
380 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
384 tf
->flags
|= ATA_TFLAG_LBA48
;
386 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
388 tf
->hob_lbah
= (block
>> 40) & 0xff;
389 tf
->hob_lbam
= (block
>> 32) & 0xff;
390 tf
->hob_lbal
= (block
>> 24) & 0xff;
392 /* request too large even for LBA48 */
395 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
398 tf
->nsect
= n_block
& 0xff;
400 tf
->lbah
= (block
>> 16) & 0xff;
401 tf
->lbam
= (block
>> 8) & 0xff;
402 tf
->lbal
= block
& 0xff;
404 tf
->device
|= ATA_LBA
;
407 u32 sect
, head
, cyl
, track
;
409 /* The request -may- be too large for CHS addressing. */
410 if (!lba_28_ok(block
, n_block
))
413 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
416 /* Convert LBA to CHS */
417 track
= (u32
)block
/ dev
->sectors
;
418 cyl
= track
/ dev
->heads
;
419 head
= track
% dev
->heads
;
420 sect
= (u32
)block
% dev
->sectors
+ 1;
422 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
423 (u32
)block
, track
, cyl
, head
, sect
);
425 /* Check whether the converted CHS can fit.
429 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
432 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
443 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
444 * @pio_mask: pio_mask
445 * @mwdma_mask: mwdma_mask
446 * @udma_mask: udma_mask
448 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
449 * unsigned int xfer_mask.
457 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
458 unsigned long mwdma_mask
,
459 unsigned long udma_mask
)
461 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
462 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
463 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
467 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
468 * @xfer_mask: xfer_mask to unpack
469 * @pio_mask: resulting pio_mask
470 * @mwdma_mask: resulting mwdma_mask
471 * @udma_mask: resulting udma_mask
473 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
474 * Any NULL distination masks will be ignored.
476 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
477 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
480 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
482 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
484 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
487 static const struct ata_xfer_ent
{
491 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
492 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
493 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
498 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
499 * @xfer_mask: xfer_mask of interest
501 * Return matching XFER_* value for @xfer_mask. Only the highest
502 * bit of @xfer_mask is considered.
508 * Matching XFER_* value, 0xff if no match found.
510 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
512 int highbit
= fls(xfer_mask
) - 1;
513 const struct ata_xfer_ent
*ent
;
515 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
516 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
517 return ent
->base
+ highbit
- ent
->shift
;
522 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
523 * @xfer_mode: XFER_* of interest
525 * Return matching xfer_mask for @xfer_mode.
531 * Matching xfer_mask, 0 if no match found.
533 unsigned long ata_xfer_mode2mask(u8 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
)
539 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
540 & ~((1 << ent
->shift
) - 1);
545 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
546 * @xfer_mode: XFER_* of interest
548 * Return matching xfer_shift for @xfer_mode.
554 * Matching xfer_shift, -1 if no match found.
556 int ata_xfer_mode2shift(unsigned long xfer_mode
)
558 const struct ata_xfer_ent
*ent
;
560 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
561 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
567 * ata_mode_string - convert xfer_mask to string
568 * @xfer_mask: mask of bits supported; only highest bit counts.
570 * Determine string which represents the highest speed
571 * (highest bit in @modemask).
577 * Constant C string representing highest speed listed in
578 * @mode_mask, or the constant C string "<n/a>".
580 const char *ata_mode_string(unsigned long xfer_mask
)
582 static const char * const xfer_mode_str
[] = {
606 highbit
= fls(xfer_mask
) - 1;
607 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
608 return xfer_mode_str
[highbit
];
612 static const char *sata_spd_string(unsigned int spd
)
614 static const char * const spd_str
[] = {
619 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
621 return spd_str
[spd
- 1];
624 void ata_dev_disable(struct ata_device
*dev
)
626 if (ata_dev_enabled(dev
)) {
627 if (ata_msg_drv(dev
->link
->ap
))
628 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
629 ata_acpi_on_disable(dev
);
630 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
636 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
638 struct ata_link
*link
= dev
->link
;
639 struct ata_port
*ap
= link
->ap
;
641 unsigned int err_mask
;
645 * disallow DIPM for drivers which haven't set
646 * ATA_FLAG_IPM. This is because when DIPM is enabled,
647 * phy ready will be set in the interrupt status on
648 * state changes, which will cause some drivers to
649 * think there are errors - additionally drivers will
650 * need to disable hot plug.
652 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
653 ap
->pm_policy
= NOT_AVAILABLE
;
658 * For DIPM, we will only enable it for the
661 * Why? Because Disks are too stupid to know that
662 * If the host rejects a request to go to SLUMBER
663 * they should retry at PARTIAL, and instead it
664 * just would give up. So, for medium_power to
665 * work at all, we need to only allow HIPM.
667 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
673 /* no restrictions on IPM transitions */
674 scontrol
&= ~(0x3 << 8);
675 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
680 if (dev
->flags
& ATA_DFLAG_DIPM
)
681 err_mask
= ata_dev_set_feature(dev
,
682 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
685 /* allow IPM to PARTIAL */
686 scontrol
&= ~(0x1 << 8);
687 scontrol
|= (0x2 << 8);
688 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
693 * we don't have to disable DIPM since IPM flags
694 * disallow transitions to SLUMBER, which effectively
695 * disable DIPM if it does not support PARTIAL
699 case MAX_PERFORMANCE
:
700 /* disable all IPM transitions */
701 scontrol
|= (0x3 << 8);
702 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
707 * we don't have to disable DIPM since IPM flags
708 * disallow all transitions which effectively
709 * disable DIPM anyway.
714 /* FIXME: handle SET FEATURES failure */
721 * ata_dev_enable_pm - enable SATA interface power management
722 * @dev: device to enable power management
723 * @policy: the link power management policy
725 * Enable SATA Interface power management. This will enable
726 * Device Interface Power Management (DIPM) for min_power
727 * policy, and then call driver specific callbacks for
728 * enabling Host Initiated Power management.
731 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
733 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
736 struct ata_port
*ap
= dev
->link
->ap
;
738 /* set HIPM first, then DIPM */
739 if (ap
->ops
->enable_pm
)
740 rc
= ap
->ops
->enable_pm(ap
, policy
);
743 rc
= ata_dev_set_dipm(dev
, policy
);
747 ap
->pm_policy
= MAX_PERFORMANCE
;
749 ap
->pm_policy
= policy
;
750 return /* rc */; /* hopefully we can use 'rc' eventually */
755 * ata_dev_disable_pm - disable SATA interface power management
756 * @dev: device to disable power management
758 * Disable SATA Interface power management. This will disable
759 * Device Interface Power Management (DIPM) without changing
760 * policy, call driver specific callbacks for disabling Host
761 * Initiated Power management.
766 static void ata_dev_disable_pm(struct ata_device
*dev
)
768 struct ata_port
*ap
= dev
->link
->ap
;
770 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
771 if (ap
->ops
->disable_pm
)
772 ap
->ops
->disable_pm(ap
);
774 #endif /* CONFIG_PM */
776 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
778 ap
->pm_policy
= policy
;
779 ap
->link
.eh_info
.action
|= ATA_EHI_LPM
;
780 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
781 ata_port_schedule_eh(ap
);
785 static void ata_lpm_enable(struct ata_host
*host
)
787 struct ata_link
*link
;
789 struct ata_device
*dev
;
792 for (i
= 0; i
< host
->n_ports
; i
++) {
794 ata_port_for_each_link(link
, ap
) {
795 ata_link_for_each_dev(dev
, link
)
796 ata_dev_disable_pm(dev
);
801 static void ata_lpm_disable(struct ata_host
*host
)
805 for (i
= 0; i
< host
->n_ports
; i
++) {
806 struct ata_port
*ap
= host
->ports
[i
];
807 ata_lpm_schedule(ap
, ap
->pm_policy
);
810 #endif /* CONFIG_PM */
814 * ata_devchk - PATA device presence detection
815 * @ap: ATA channel to examine
816 * @device: Device to examine (starting at zero)
818 * This technique was originally described in
819 * Hale Landis's ATADRVR (www.ata-atapi.com), and
820 * later found its way into the ATA/ATAPI spec.
822 * Write a pattern to the ATA shadow registers,
823 * and if a device is present, it will respond by
824 * correctly storing and echoing back the
825 * ATA shadow register contents.
831 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
833 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
836 ap
->ops
->dev_select(ap
, device
);
838 iowrite8(0x55, ioaddr
->nsect_addr
);
839 iowrite8(0xaa, ioaddr
->lbal_addr
);
841 iowrite8(0xaa, ioaddr
->nsect_addr
);
842 iowrite8(0x55, ioaddr
->lbal_addr
);
844 iowrite8(0x55, ioaddr
->nsect_addr
);
845 iowrite8(0xaa, ioaddr
->lbal_addr
);
847 nsect
= ioread8(ioaddr
->nsect_addr
);
848 lbal
= ioread8(ioaddr
->lbal_addr
);
850 if ((nsect
== 0x55) && (lbal
== 0xaa))
851 return 1; /* we found a device */
853 return 0; /* nothing found */
857 * ata_dev_classify - determine device type based on ATA-spec signature
858 * @tf: ATA taskfile register set for device to be identified
860 * Determine from taskfile register contents whether a device is
861 * ATA or ATAPI, as per "Signature and persistence" section
862 * of ATA/PI spec (volume 1, sect 5.14).
868 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
869 * %ATA_DEV_UNKNOWN the event of failure.
871 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
873 /* Apple's open source Darwin code hints that some devices only
874 * put a proper signature into the LBA mid/high registers,
875 * So, we only check those. It's sufficient for uniqueness.
877 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
878 * signatures for ATA and ATAPI devices attached on SerialATA,
879 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
880 * spec has never mentioned about using different signatures
881 * for ATA/ATAPI devices. Then, Serial ATA II: Port
882 * Multiplier specification began to use 0x69/0x96 to identify
883 * port multpliers and 0x3c/0xc3 to identify SEMB device.
884 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
885 * 0x69/0x96 shortly and described them as reserved for
888 * We follow the current spec and consider that 0x69/0x96
889 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
891 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
892 DPRINTK("found ATA device by sig\n");
896 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
897 DPRINTK("found ATAPI device by sig\n");
898 return ATA_DEV_ATAPI
;
901 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
902 DPRINTK("found PMP device by sig\n");
906 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
907 printk(KERN_INFO
"ata: SEMB device ignored\n");
908 return ATA_DEV_SEMB_UNSUP
; /* not yet */
911 DPRINTK("unknown device\n");
912 return ATA_DEV_UNKNOWN
;
916 * ata_dev_try_classify - Parse returned ATA device signature
917 * @dev: ATA device to classify (starting at zero)
918 * @present: device seems present
919 * @r_err: Value of error register on completion
921 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
922 * an ATA/ATAPI-defined set of values is placed in the ATA
923 * shadow registers, indicating the results of device detection
926 * Select the ATA device, and read the values from the ATA shadow
927 * registers. Then parse according to the Error register value,
928 * and the spec-defined values examined by ata_dev_classify().
934 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
936 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
939 struct ata_port
*ap
= dev
->link
->ap
;
940 struct ata_taskfile tf
;
944 ap
->ops
->dev_select(ap
, dev
->devno
);
946 memset(&tf
, 0, sizeof(tf
));
948 ap
->ops
->tf_read(ap
, &tf
);
953 /* see if device passed diags: if master then continue and warn later */
954 if (err
== 0 && dev
->devno
== 0)
955 /* diagnostic fail : do nothing _YET_ */
956 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
959 else if ((dev
->devno
== 0) && (err
== 0x81))
964 /* determine if device is ATA or ATAPI */
965 class = ata_dev_classify(&tf
);
967 if (class == ATA_DEV_UNKNOWN
) {
968 /* If the device failed diagnostic, it's likely to
969 * have reported incorrect device signature too.
970 * Assume ATA device if the device seems present but
971 * device signature is invalid with diagnostic
974 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
977 class = ATA_DEV_NONE
;
978 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
979 class = ATA_DEV_NONE
;
985 * ata_id_string - Convert IDENTIFY DEVICE page into string
986 * @id: IDENTIFY DEVICE results we will examine
987 * @s: string into which data is output
988 * @ofs: offset into identify device page
989 * @len: length of string to return. must be an even number.
991 * The strings in the IDENTIFY DEVICE page are broken up into
992 * 16-bit chunks. Run through the string, and output each
993 * 8-bit chunk linearly, regardless of platform.
999 void ata_id_string(const u16
*id
, unsigned char *s
,
1000 unsigned int ofs
, unsigned int len
)
1019 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1020 * @id: IDENTIFY DEVICE results we will examine
1021 * @s: string into which data is output
1022 * @ofs: offset into identify device page
1023 * @len: length of string to return. must be an odd number.
1025 * This function is identical to ata_id_string except that it
1026 * trims trailing spaces and terminates the resulting string with
1027 * null. @len must be actual maximum length (even number) + 1.
1032 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1033 unsigned int ofs
, unsigned int len
)
1037 WARN_ON(!(len
& 1));
1039 ata_id_string(id
, s
, ofs
, len
- 1);
1041 p
= s
+ strnlen(s
, len
- 1);
1042 while (p
> s
&& p
[-1] == ' ')
1047 static u64
ata_id_n_sectors(const u16
*id
)
1049 if (ata_id_has_lba(id
)) {
1050 if (ata_id_has_lba48(id
))
1051 return ata_id_u64(id
, 100);
1053 return ata_id_u32(id
, 60);
1055 if (ata_id_current_chs_valid(id
))
1056 return ata_id_u32(id
, 57);
1058 return id
[1] * id
[3] * id
[6];
1062 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
1066 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1067 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1068 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1069 sectors
|= (tf
->lbah
& 0xff) << 16;
1070 sectors
|= (tf
->lbam
& 0xff) << 8;
1071 sectors
|= (tf
->lbal
& 0xff);
1076 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
1080 sectors
|= (tf
->device
& 0x0f) << 24;
1081 sectors
|= (tf
->lbah
& 0xff) << 16;
1082 sectors
|= (tf
->lbam
& 0xff) << 8;
1083 sectors
|= (tf
->lbal
& 0xff);
1089 * ata_read_native_max_address - Read native max address
1090 * @dev: target device
1091 * @max_sectors: out parameter for the result native max address
1093 * Perform an LBA48 or LBA28 native size query upon the device in
1097 * 0 on success, -EACCES if command is aborted by the drive.
1098 * -EIO on other errors.
1100 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1102 unsigned int err_mask
;
1103 struct ata_taskfile tf
;
1104 int lba48
= ata_id_has_lba48(dev
->id
);
1106 ata_tf_init(dev
, &tf
);
1108 /* always clear all address registers */
1109 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1112 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1113 tf
.flags
|= ATA_TFLAG_LBA48
;
1115 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1117 tf
.protocol
|= ATA_PROT_NODATA
;
1118 tf
.device
|= ATA_LBA
;
1120 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1122 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1123 "max address (err_mask=0x%x)\n", err_mask
);
1124 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1130 *max_sectors
= ata_tf_to_lba48(&tf
);
1132 *max_sectors
= ata_tf_to_lba(&tf
);
1133 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1139 * ata_set_max_sectors - Set max sectors
1140 * @dev: target device
1141 * @new_sectors: new max sectors value to set for the device
1143 * Set max sectors of @dev to @new_sectors.
1146 * 0 on success, -EACCES if command is aborted or denied (due to
1147 * previous non-volatile SET_MAX) by the drive. -EIO on other
1150 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1152 unsigned int err_mask
;
1153 struct ata_taskfile tf
;
1154 int lba48
= ata_id_has_lba48(dev
->id
);
1158 ata_tf_init(dev
, &tf
);
1160 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1163 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1164 tf
.flags
|= ATA_TFLAG_LBA48
;
1166 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1167 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1168 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1170 tf
.command
= ATA_CMD_SET_MAX
;
1172 tf
.device
|= (new_sectors
>> 24) & 0xf;
1175 tf
.protocol
|= ATA_PROT_NODATA
;
1176 tf
.device
|= ATA_LBA
;
1178 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1179 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1180 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1182 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1184 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1185 "max address (err_mask=0x%x)\n", err_mask
);
1186 if (err_mask
== AC_ERR_DEV
&&
1187 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1196 * ata_hpa_resize - Resize a device with an HPA set
1197 * @dev: Device to resize
1199 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1200 * it if required to the full size of the media. The caller must check
1201 * the drive has the HPA feature set enabled.
1204 * 0 on success, -errno on failure.
1206 static int ata_hpa_resize(struct ata_device
*dev
)
1208 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1209 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1210 u64 sectors
= ata_id_n_sectors(dev
->id
);
1214 /* do we need to do it? */
1215 if (dev
->class != ATA_DEV_ATA
||
1216 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1217 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1220 /* read native max address */
1221 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1223 /* If HPA isn't going to be unlocked, skip HPA
1224 * resizing from the next try.
1226 if (!ata_ignore_hpa
) {
1227 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1228 "broken, will skip HPA handling\n");
1229 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1231 /* we can continue if device aborted the command */
1239 /* nothing to do? */
1240 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1241 if (!print_info
|| native_sectors
== sectors
)
1244 if (native_sectors
> sectors
)
1245 ata_dev_printk(dev
, KERN_INFO
,
1246 "HPA detected: current %llu, native %llu\n",
1247 (unsigned long long)sectors
,
1248 (unsigned long long)native_sectors
);
1249 else if (native_sectors
< sectors
)
1250 ata_dev_printk(dev
, KERN_WARNING
,
1251 "native sectors (%llu) is smaller than "
1253 (unsigned long long)native_sectors
,
1254 (unsigned long long)sectors
);
1258 /* let's unlock HPA */
1259 rc
= ata_set_max_sectors(dev
, native_sectors
);
1260 if (rc
== -EACCES
) {
1261 /* if device aborted the command, skip HPA resizing */
1262 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1263 "(%llu -> %llu), skipping HPA handling\n",
1264 (unsigned long long)sectors
,
1265 (unsigned long long)native_sectors
);
1266 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1271 /* re-read IDENTIFY data */
1272 rc
= ata_dev_reread_id(dev
, 0);
1274 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1275 "data after HPA resizing\n");
1280 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1281 ata_dev_printk(dev
, KERN_INFO
,
1282 "HPA unlocked: %llu -> %llu, native %llu\n",
1283 (unsigned long long)sectors
,
1284 (unsigned long long)new_sectors
,
1285 (unsigned long long)native_sectors
);
1292 * ata_noop_dev_select - Select device 0/1 on ATA bus
1293 * @ap: ATA channel to manipulate
1294 * @device: ATA device (numbered from zero) to select
1296 * This function performs no actual function.
1298 * May be used as the dev_select() entry in ata_port_operations.
1303 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1309 * ata_std_dev_select - Select device 0/1 on ATA bus
1310 * @ap: ATA channel to manipulate
1311 * @device: ATA device (numbered from zero) to select
1313 * Use the method defined in the ATA specification to
1314 * make either device 0, or device 1, active on the
1315 * ATA channel. Works with both PIO and MMIO.
1317 * May be used as the dev_select() entry in ata_port_operations.
1323 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1328 tmp
= ATA_DEVICE_OBS
;
1330 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1332 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1333 ata_pause(ap
); /* needed; also flushes, for mmio */
1337 * ata_dev_select - Select device 0/1 on ATA bus
1338 * @ap: ATA channel to manipulate
1339 * @device: ATA device (numbered from zero) to select
1340 * @wait: non-zero to wait for Status register BSY bit to clear
1341 * @can_sleep: non-zero if context allows sleeping
1343 * Use the method defined in the ATA specification to
1344 * make either device 0, or device 1, active on the
1347 * This is a high-level version of ata_std_dev_select(),
1348 * which additionally provides the services of inserting
1349 * the proper pauses and status polling, where needed.
1355 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1356 unsigned int wait
, unsigned int can_sleep
)
1358 if (ata_msg_probe(ap
))
1359 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1360 "device %u, wait %u\n", device
, wait
);
1365 ap
->ops
->dev_select(ap
, device
);
1368 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1375 * ata_dump_id - IDENTIFY DEVICE info debugging output
1376 * @id: IDENTIFY DEVICE page to dump
1378 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1385 static inline void ata_dump_id(const u16
*id
)
1387 DPRINTK("49==0x%04x "
1397 DPRINTK("80==0x%04x "
1407 DPRINTK("88==0x%04x "
1414 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1415 * @id: IDENTIFY data to compute xfer mask from
1417 * Compute the xfermask for this device. This is not as trivial
1418 * as it seems if we must consider early devices correctly.
1420 * FIXME: pre IDE drive timing (do we care ?).
1428 unsigned long ata_id_xfermask(const u16
*id
)
1430 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1432 /* Usual case. Word 53 indicates word 64 is valid */
1433 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1434 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1438 /* If word 64 isn't valid then Word 51 high byte holds
1439 * the PIO timing number for the maximum. Turn it into
1442 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1443 if (mode
< 5) /* Valid PIO range */
1444 pio_mask
= (2 << mode
) - 1;
1448 /* But wait.. there's more. Design your standards by
1449 * committee and you too can get a free iordy field to
1450 * process. However its the speeds not the modes that
1451 * are supported... Note drivers using the timing API
1452 * will get this right anyway
1456 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1458 if (ata_id_is_cfa(id
)) {
1460 * Process compact flash extended modes
1462 int pio
= id
[163] & 0x7;
1463 int dma
= (id
[163] >> 3) & 7;
1466 pio_mask
|= (1 << 5);
1468 pio_mask
|= (1 << 6);
1470 mwdma_mask
|= (1 << 3);
1472 mwdma_mask
|= (1 << 4);
1476 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1477 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1479 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1483 * ata_port_queue_task - Queue port_task
1484 * @ap: The ata_port to queue port_task for
1485 * @fn: workqueue function to be scheduled
1486 * @data: data for @fn to use
1487 * @delay: delay time for workqueue function
1489 * Schedule @fn(@data) for execution after @delay jiffies using
1490 * port_task. There is one port_task per port and it's the
1491 * user(low level driver)'s responsibility to make sure that only
1492 * one task is active at any given time.
1494 * libata core layer takes care of synchronization between
1495 * port_task and EH. ata_port_queue_task() may be ignored for EH
1499 * Inherited from caller.
1501 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1502 unsigned long delay
)
1504 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1505 ap
->port_task_data
= data
;
1507 /* may fail if ata_port_flush_task() in progress */
1508 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1512 * ata_port_flush_task - Flush port_task
1513 * @ap: The ata_port to flush port_task for
1515 * After this function completes, port_task is guranteed not to
1516 * be running or scheduled.
1519 * Kernel thread context (may sleep)
1521 void ata_port_flush_task(struct ata_port
*ap
)
1525 cancel_rearming_delayed_work(&ap
->port_task
);
1527 if (ata_msg_ctl(ap
))
1528 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1531 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1533 struct completion
*waiting
= qc
->private_data
;
1539 * ata_exec_internal_sg - execute libata internal command
1540 * @dev: Device to which the command is sent
1541 * @tf: Taskfile registers for the command and the result
1542 * @cdb: CDB for packet command
1543 * @dma_dir: Data tranfer direction of the command
1544 * @sgl: sg list for the data buffer of the command
1545 * @n_elem: Number of sg entries
1546 * @timeout: Timeout in msecs (0 for default)
1548 * Executes libata internal command with timeout. @tf contains
1549 * command on entry and result on return. Timeout and error
1550 * conditions are reported via return value. No recovery action
1551 * is taken after a command times out. It's caller's duty to
1552 * clean up after timeout.
1555 * None. Should be called with kernel context, might sleep.
1558 * Zero on success, AC_ERR_* mask on failure
1560 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1561 struct ata_taskfile
*tf
, const u8
*cdb
,
1562 int dma_dir
, struct scatterlist
*sgl
,
1563 unsigned int n_elem
, unsigned long timeout
)
1565 struct ata_link
*link
= dev
->link
;
1566 struct ata_port
*ap
= link
->ap
;
1567 u8 command
= tf
->command
;
1568 struct ata_queued_cmd
*qc
;
1569 unsigned int tag
, preempted_tag
;
1570 u32 preempted_sactive
, preempted_qc_active
;
1571 int preempted_nr_active_links
;
1572 DECLARE_COMPLETION_ONSTACK(wait
);
1573 unsigned long flags
;
1574 unsigned int err_mask
;
1577 spin_lock_irqsave(ap
->lock
, flags
);
1579 /* no internal command while frozen */
1580 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1581 spin_unlock_irqrestore(ap
->lock
, flags
);
1582 return AC_ERR_SYSTEM
;
1585 /* initialize internal qc */
1587 /* XXX: Tag 0 is used for drivers with legacy EH as some
1588 * drivers choke if any other tag is given. This breaks
1589 * ata_tag_internal() test for those drivers. Don't use new
1590 * EH stuff without converting to it.
1592 if (ap
->ops
->error_handler
)
1593 tag
= ATA_TAG_INTERNAL
;
1597 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1599 qc
= __ata_qc_from_tag(ap
, tag
);
1607 preempted_tag
= link
->active_tag
;
1608 preempted_sactive
= link
->sactive
;
1609 preempted_qc_active
= ap
->qc_active
;
1610 preempted_nr_active_links
= ap
->nr_active_links
;
1611 link
->active_tag
= ATA_TAG_POISON
;
1614 ap
->nr_active_links
= 0;
1616 /* prepare & issue qc */
1619 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1620 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1621 qc
->dma_dir
= dma_dir
;
1622 if (dma_dir
!= DMA_NONE
) {
1623 unsigned int i
, buflen
= 0;
1624 struct scatterlist
*sg
;
1626 for_each_sg(sgl
, sg
, n_elem
, i
)
1627 buflen
+= sg
->length
;
1629 ata_sg_init(qc
, sgl
, n_elem
);
1630 qc
->nbytes
= buflen
;
1633 qc
->private_data
= &wait
;
1634 qc
->complete_fn
= ata_qc_complete_internal
;
1638 spin_unlock_irqrestore(ap
->lock
, flags
);
1641 timeout
= ata_probe_timeout
* 1000 / HZ
;
1643 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1645 ata_port_flush_task(ap
);
1648 spin_lock_irqsave(ap
->lock
, flags
);
1650 /* We're racing with irq here. If we lose, the
1651 * following test prevents us from completing the qc
1652 * twice. If we win, the port is frozen and will be
1653 * cleaned up by ->post_internal_cmd().
1655 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1656 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1658 if (ap
->ops
->error_handler
)
1659 ata_port_freeze(ap
);
1661 ata_qc_complete(qc
);
1663 if (ata_msg_warn(ap
))
1664 ata_dev_printk(dev
, KERN_WARNING
,
1665 "qc timeout (cmd 0x%x)\n", command
);
1668 spin_unlock_irqrestore(ap
->lock
, flags
);
1671 /* do post_internal_cmd */
1672 if (ap
->ops
->post_internal_cmd
)
1673 ap
->ops
->post_internal_cmd(qc
);
1675 /* perform minimal error analysis */
1676 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1677 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1678 qc
->err_mask
|= AC_ERR_DEV
;
1681 qc
->err_mask
|= AC_ERR_OTHER
;
1683 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1684 qc
->err_mask
&= ~AC_ERR_OTHER
;
1688 spin_lock_irqsave(ap
->lock
, flags
);
1690 *tf
= qc
->result_tf
;
1691 err_mask
= qc
->err_mask
;
1694 link
->active_tag
= preempted_tag
;
1695 link
->sactive
= preempted_sactive
;
1696 ap
->qc_active
= preempted_qc_active
;
1697 ap
->nr_active_links
= preempted_nr_active_links
;
1699 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1700 * Until those drivers are fixed, we detect the condition
1701 * here, fail the command with AC_ERR_SYSTEM and reenable the
1704 * Note that this doesn't change any behavior as internal
1705 * command failure results in disabling the device in the
1706 * higher layer for LLDDs without new reset/EH callbacks.
1708 * Kill the following code as soon as those drivers are fixed.
1710 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1711 err_mask
|= AC_ERR_SYSTEM
;
1715 spin_unlock_irqrestore(ap
->lock
, flags
);
1721 * ata_exec_internal - execute libata internal command
1722 * @dev: Device to which the command is sent
1723 * @tf: Taskfile registers for the command and the result
1724 * @cdb: CDB for packet command
1725 * @dma_dir: Data tranfer direction of the command
1726 * @buf: Data buffer of the command
1727 * @buflen: Length of data buffer
1728 * @timeout: Timeout in msecs (0 for default)
1730 * Wrapper around ata_exec_internal_sg() which takes simple
1731 * buffer instead of sg list.
1734 * None. Should be called with kernel context, might sleep.
1737 * Zero on success, AC_ERR_* mask on failure
1739 unsigned ata_exec_internal(struct ata_device
*dev
,
1740 struct ata_taskfile
*tf
, const u8
*cdb
,
1741 int dma_dir
, void *buf
, unsigned int buflen
,
1742 unsigned long timeout
)
1744 struct scatterlist
*psg
= NULL
, sg
;
1745 unsigned int n_elem
= 0;
1747 if (dma_dir
!= DMA_NONE
) {
1749 sg_init_one(&sg
, buf
, buflen
);
1754 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1759 * ata_do_simple_cmd - execute simple internal command
1760 * @dev: Device to which the command is sent
1761 * @cmd: Opcode to execute
1763 * Execute a 'simple' command, that only consists of the opcode
1764 * 'cmd' itself, without filling any other registers
1767 * Kernel thread context (may sleep).
1770 * Zero on success, AC_ERR_* mask on failure
1772 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1774 struct ata_taskfile tf
;
1776 ata_tf_init(dev
, &tf
);
1779 tf
.flags
|= ATA_TFLAG_DEVICE
;
1780 tf
.protocol
= ATA_PROT_NODATA
;
1782 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1786 * ata_pio_need_iordy - check if iordy needed
1789 * Check if the current speed of the device requires IORDY. Used
1790 * by various controllers for chip configuration.
1793 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1795 /* Controller doesn't support IORDY. Probably a pointless check
1796 as the caller should know this */
1797 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1799 /* PIO3 and higher it is mandatory */
1800 if (adev
->pio_mode
> XFER_PIO_2
)
1802 /* We turn it on when possible */
1803 if (ata_id_has_iordy(adev
->id
))
1809 * ata_pio_mask_no_iordy - Return the non IORDY mask
1812 * Compute the highest mode possible if we are not using iordy. Return
1813 * -1 if no iordy mode is available.
1816 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1818 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1819 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1820 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1821 /* Is the speed faster than the drive allows non IORDY ? */
1823 /* This is cycle times not frequency - watch the logic! */
1824 if (pio
> 240) /* PIO2 is 240nS per cycle */
1825 return 3 << ATA_SHIFT_PIO
;
1826 return 7 << ATA_SHIFT_PIO
;
1829 return 3 << ATA_SHIFT_PIO
;
1833 * ata_dev_read_id - Read ID data from the specified device
1834 * @dev: target device
1835 * @p_class: pointer to class of the target device (may be changed)
1836 * @flags: ATA_READID_* flags
1837 * @id: buffer to read IDENTIFY data into
1839 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1840 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1841 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1842 * for pre-ATA4 drives.
1844 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1845 * now we abort if we hit that case.
1848 * Kernel thread context (may sleep)
1851 * 0 on success, -errno otherwise.
1853 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1854 unsigned int flags
, u16
*id
)
1856 struct ata_port
*ap
= dev
->link
->ap
;
1857 unsigned int class = *p_class
;
1858 struct ata_taskfile tf
;
1859 unsigned int err_mask
= 0;
1861 int may_fallback
= 1, tried_spinup
= 0;
1864 if (ata_msg_ctl(ap
))
1865 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1867 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1869 ata_tf_init(dev
, &tf
);
1873 tf
.command
= ATA_CMD_ID_ATA
;
1876 tf
.command
= ATA_CMD_ID_ATAPI
;
1880 reason
= "unsupported class";
1884 tf
.protocol
= ATA_PROT_PIO
;
1886 /* Some devices choke if TF registers contain garbage. Make
1887 * sure those are properly initialized.
1889 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1891 /* Device presence detection is unreliable on some
1892 * controllers. Always poll IDENTIFY if available.
1894 tf
.flags
|= ATA_TFLAG_POLLING
;
1896 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1897 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1899 if (err_mask
& AC_ERR_NODEV_HINT
) {
1900 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1901 ap
->print_id
, dev
->devno
);
1905 /* Device or controller might have reported the wrong
1906 * device class. Give a shot at the other IDENTIFY if
1907 * the current one is aborted by the device.
1910 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1913 if (class == ATA_DEV_ATA
)
1914 class = ATA_DEV_ATAPI
;
1916 class = ATA_DEV_ATA
;
1921 reason
= "I/O error";
1925 /* Falling back doesn't make sense if ID data was read
1926 * successfully at least once.
1930 swap_buf_le16(id
, ATA_ID_WORDS
);
1934 reason
= "device reports invalid type";
1936 if (class == ATA_DEV_ATA
) {
1937 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1940 if (ata_id_is_ata(id
))
1944 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1947 * Drive powered-up in standby mode, and requires a specific
1948 * SET_FEATURES spin-up subcommand before it will accept
1949 * anything other than the original IDENTIFY command.
1951 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1952 if (err_mask
&& id
[2] != 0x738c) {
1954 reason
= "SPINUP failed";
1958 * If the drive initially returned incomplete IDENTIFY info,
1959 * we now must reissue the IDENTIFY command.
1961 if (id
[2] == 0x37c8)
1965 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1967 * The exact sequence expected by certain pre-ATA4 drives is:
1969 * IDENTIFY (optional in early ATA)
1970 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1972 * Some drives were very specific about that exact sequence.
1974 * Note that ATA4 says lba is mandatory so the second check
1975 * shoud never trigger.
1977 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
1978 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
1981 reason
= "INIT_DEV_PARAMS failed";
1985 /* current CHS translation info (id[53-58]) might be
1986 * changed. reread the identify device info.
1988 flags
&= ~ATA_READID_POSTRESET
;
1998 if (ata_msg_warn(ap
))
1999 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2000 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2004 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2006 struct ata_port
*ap
= dev
->link
->ap
;
2007 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2010 static void ata_dev_config_ncq(struct ata_device
*dev
,
2011 char *desc
, size_t desc_sz
)
2013 struct ata_port
*ap
= dev
->link
->ap
;
2014 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2016 if (!ata_id_has_ncq(dev
->id
)) {
2020 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2021 snprintf(desc
, desc_sz
, "NCQ (not used)");
2024 if (ap
->flags
& ATA_FLAG_NCQ
) {
2025 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2026 dev
->flags
|= ATA_DFLAG_NCQ
;
2029 if (hdepth
>= ddepth
)
2030 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2032 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2036 * ata_dev_configure - Configure the specified ATA/ATAPI device
2037 * @dev: Target device to configure
2039 * Configure @dev according to @dev->id. Generic and low-level
2040 * driver specific fixups are also applied.
2043 * Kernel thread context (may sleep)
2046 * 0 on success, -errno otherwise
2048 int ata_dev_configure(struct ata_device
*dev
)
2050 struct ata_port
*ap
= dev
->link
->ap
;
2051 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2052 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2053 const u16
*id
= dev
->id
;
2054 unsigned long xfer_mask
;
2055 char revbuf
[7]; /* XYZ-99\0 */
2056 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2057 char modelbuf
[ATA_ID_PROD_LEN
+1];
2060 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2061 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2066 if (ata_msg_probe(ap
))
2067 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
2070 dev
->horkage
|= ata_dev_blacklisted(dev
);
2072 /* let ACPI work its magic */
2073 rc
= ata_acpi_on_devcfg(dev
);
2077 /* massage HPA, do it early as it might change IDENTIFY data */
2078 rc
= ata_hpa_resize(dev
);
2082 /* print device capabilities */
2083 if (ata_msg_probe(ap
))
2084 ata_dev_printk(dev
, KERN_DEBUG
,
2085 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2086 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2088 id
[49], id
[82], id
[83], id
[84],
2089 id
[85], id
[86], id
[87], id
[88]);
2091 /* initialize to-be-configured parameters */
2092 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2093 dev
->max_sectors
= 0;
2101 * common ATA, ATAPI feature tests
2104 /* find max transfer mode; for printk only */
2105 xfer_mask
= ata_id_xfermask(id
);
2107 if (ata_msg_probe(ap
))
2110 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2111 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2114 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2117 /* ATA-specific feature tests */
2118 if (dev
->class == ATA_DEV_ATA
) {
2119 if (ata_id_is_cfa(id
)) {
2120 if (id
[162] & 1) /* CPRM may make this media unusable */
2121 ata_dev_printk(dev
, KERN_WARNING
,
2122 "supports DRM functions and may "
2123 "not be fully accessable.\n");
2124 snprintf(revbuf
, 7, "CFA");
2126 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2127 /* Warn the user if the device has TPM extensions */
2128 if (ata_id_has_tpm(id
))
2129 ata_dev_printk(dev
, KERN_WARNING
,
2130 "supports DRM functions and may "
2131 "not be fully accessable.\n");
2134 dev
->n_sectors
= ata_id_n_sectors(id
);
2136 if (dev
->id
[59] & 0x100)
2137 dev
->multi_count
= dev
->id
[59] & 0xff;
2139 if (ata_id_has_lba(id
)) {
2140 const char *lba_desc
;
2144 dev
->flags
|= ATA_DFLAG_LBA
;
2145 if (ata_id_has_lba48(id
)) {
2146 dev
->flags
|= ATA_DFLAG_LBA48
;
2149 if (dev
->n_sectors
>= (1UL << 28) &&
2150 ata_id_has_flush_ext(id
))
2151 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2155 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2157 /* print device info to dmesg */
2158 if (ata_msg_drv(ap
) && print_info
) {
2159 ata_dev_printk(dev
, KERN_INFO
,
2160 "%s: %s, %s, max %s\n",
2161 revbuf
, modelbuf
, fwrevbuf
,
2162 ata_mode_string(xfer_mask
));
2163 ata_dev_printk(dev
, KERN_INFO
,
2164 "%Lu sectors, multi %u: %s %s\n",
2165 (unsigned long long)dev
->n_sectors
,
2166 dev
->multi_count
, lba_desc
, ncq_desc
);
2171 /* Default translation */
2172 dev
->cylinders
= id
[1];
2174 dev
->sectors
= id
[6];
2176 if (ata_id_current_chs_valid(id
)) {
2177 /* Current CHS translation is valid. */
2178 dev
->cylinders
= id
[54];
2179 dev
->heads
= id
[55];
2180 dev
->sectors
= id
[56];
2183 /* print device info to dmesg */
2184 if (ata_msg_drv(ap
) && print_info
) {
2185 ata_dev_printk(dev
, KERN_INFO
,
2186 "%s: %s, %s, max %s\n",
2187 revbuf
, modelbuf
, fwrevbuf
,
2188 ata_mode_string(xfer_mask
));
2189 ata_dev_printk(dev
, KERN_INFO
,
2190 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2191 (unsigned long long)dev
->n_sectors
,
2192 dev
->multi_count
, dev
->cylinders
,
2193 dev
->heads
, dev
->sectors
);
2200 /* ATAPI-specific feature tests */
2201 else if (dev
->class == ATA_DEV_ATAPI
) {
2202 const char *cdb_intr_string
= "";
2203 const char *atapi_an_string
= "";
2206 rc
= atapi_cdb_len(id
);
2207 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2208 if (ata_msg_warn(ap
))
2209 ata_dev_printk(dev
, KERN_WARNING
,
2210 "unsupported CDB len\n");
2214 dev
->cdb_len
= (unsigned int) rc
;
2216 /* Enable ATAPI AN if both the host and device have
2217 * the support. If PMP is attached, SNTF is required
2218 * to enable ATAPI AN to discern between PHY status
2219 * changed notifications and ATAPI ANs.
2221 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2222 (!ap
->nr_pmp_links
||
2223 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2224 unsigned int err_mask
;
2226 /* issue SET feature command to turn this on */
2227 err_mask
= ata_dev_set_feature(dev
,
2228 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2230 ata_dev_printk(dev
, KERN_ERR
,
2231 "failed to enable ATAPI AN "
2232 "(err_mask=0x%x)\n", err_mask
);
2234 dev
->flags
|= ATA_DFLAG_AN
;
2235 atapi_an_string
= ", ATAPI AN";
2239 if (ata_id_cdb_intr(dev
->id
)) {
2240 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2241 cdb_intr_string
= ", CDB intr";
2244 /* print device info to dmesg */
2245 if (ata_msg_drv(ap
) && print_info
)
2246 ata_dev_printk(dev
, KERN_INFO
,
2247 "ATAPI: %s, %s, max %s%s%s\n",
2249 ata_mode_string(xfer_mask
),
2250 cdb_intr_string
, atapi_an_string
);
2253 /* determine max_sectors */
2254 dev
->max_sectors
= ATA_MAX_SECTORS
;
2255 if (dev
->flags
& ATA_DFLAG_LBA48
)
2256 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2258 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2259 if (ata_id_has_hipm(dev
->id
))
2260 dev
->flags
|= ATA_DFLAG_HIPM
;
2261 if (ata_id_has_dipm(dev
->id
))
2262 dev
->flags
|= ATA_DFLAG_DIPM
;
2265 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2266 /* Let the user know. We don't want to disallow opens for
2267 rescue purposes, or in case the vendor is just a blithering
2270 ata_dev_printk(dev
, KERN_WARNING
,
2271 "Drive reports diagnostics failure. This may indicate a drive\n");
2272 ata_dev_printk(dev
, KERN_WARNING
,
2273 "fault or invalid emulation. Contact drive vendor for information.\n");
2277 /* limit bridge transfers to udma5, 200 sectors */
2278 if (ata_dev_knobble(dev
)) {
2279 if (ata_msg_drv(ap
) && print_info
)
2280 ata_dev_printk(dev
, KERN_INFO
,
2281 "applying bridge limits\n");
2282 dev
->udma_mask
&= ATA_UDMA5
;
2283 dev
->max_sectors
= ATA_MAX_SECTORS
;
2286 if ((dev
->class == ATA_DEV_ATAPI
) &&
2287 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2288 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2289 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2292 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2293 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2296 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2297 dev
->horkage
|= ATA_HORKAGE_IPM
;
2299 /* reset link pm_policy for this port to no pm */
2300 ap
->pm_policy
= MAX_PERFORMANCE
;
2303 if (ap
->ops
->dev_config
)
2304 ap
->ops
->dev_config(dev
);
2306 if (ata_msg_probe(ap
))
2307 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2308 __FUNCTION__
, ata_chk_status(ap
));
2312 if (ata_msg_probe(ap
))
2313 ata_dev_printk(dev
, KERN_DEBUG
,
2314 "%s: EXIT, err\n", __FUNCTION__
);
2319 * ata_cable_40wire - return 40 wire cable type
2322 * Helper method for drivers which want to hardwire 40 wire cable
2326 int ata_cable_40wire(struct ata_port
*ap
)
2328 return ATA_CBL_PATA40
;
2332 * ata_cable_80wire - return 80 wire cable type
2335 * Helper method for drivers which want to hardwire 80 wire cable
2339 int ata_cable_80wire(struct ata_port
*ap
)
2341 return ATA_CBL_PATA80
;
2345 * ata_cable_unknown - return unknown PATA cable.
2348 * Helper method for drivers which have no PATA cable detection.
2351 int ata_cable_unknown(struct ata_port
*ap
)
2353 return ATA_CBL_PATA_UNK
;
2357 * ata_cable_ignore - return ignored PATA cable.
2360 * Helper method for drivers which don't use cable type to limit
2363 int ata_cable_ignore(struct ata_port
*ap
)
2365 return ATA_CBL_PATA_IGN
;
2369 * ata_cable_sata - return SATA cable type
2372 * Helper method for drivers which have SATA cables
2375 int ata_cable_sata(struct ata_port
*ap
)
2377 return ATA_CBL_SATA
;
2381 * ata_bus_probe - Reset and probe ATA bus
2384 * Master ATA bus probing function. Initiates a hardware-dependent
2385 * bus reset, then attempts to identify any devices found on
2389 * PCI/etc. bus probe sem.
2392 * Zero on success, negative errno otherwise.
2395 int ata_bus_probe(struct ata_port
*ap
)
2397 unsigned int classes
[ATA_MAX_DEVICES
];
2398 int tries
[ATA_MAX_DEVICES
];
2400 struct ata_device
*dev
;
2404 ata_link_for_each_dev(dev
, &ap
->link
)
2405 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2408 ata_link_for_each_dev(dev
, &ap
->link
) {
2409 /* If we issue an SRST then an ATA drive (not ATAPI)
2410 * may change configuration and be in PIO0 timing. If
2411 * we do a hard reset (or are coming from power on)
2412 * this is true for ATA or ATAPI. Until we've set a
2413 * suitable controller mode we should not touch the
2414 * bus as we may be talking too fast.
2416 dev
->pio_mode
= XFER_PIO_0
;
2418 /* If the controller has a pio mode setup function
2419 * then use it to set the chipset to rights. Don't
2420 * touch the DMA setup as that will be dealt with when
2421 * configuring devices.
2423 if (ap
->ops
->set_piomode
)
2424 ap
->ops
->set_piomode(ap
, dev
);
2427 /* reset and determine device classes */
2428 ap
->ops
->phy_reset(ap
);
2430 ata_link_for_each_dev(dev
, &ap
->link
) {
2431 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2432 dev
->class != ATA_DEV_UNKNOWN
)
2433 classes
[dev
->devno
] = dev
->class;
2435 classes
[dev
->devno
] = ATA_DEV_NONE
;
2437 dev
->class = ATA_DEV_UNKNOWN
;
2442 /* read IDENTIFY page and configure devices. We have to do the identify
2443 specific sequence bass-ackwards so that PDIAG- is released by
2446 ata_link_for_each_dev(dev
, &ap
->link
) {
2447 if (tries
[dev
->devno
])
2448 dev
->class = classes
[dev
->devno
];
2450 if (!ata_dev_enabled(dev
))
2453 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2459 /* Now ask for the cable type as PDIAG- should have been released */
2460 if (ap
->ops
->cable_detect
)
2461 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2463 /* We may have SATA bridge glue hiding here irrespective of the
2464 reported cable types and sensed types */
2465 ata_link_for_each_dev(dev
, &ap
->link
) {
2466 if (!ata_dev_enabled(dev
))
2468 /* SATA drives indicate we have a bridge. We don't know which
2469 end of the link the bridge is which is a problem */
2470 if (ata_id_is_sata(dev
->id
))
2471 ap
->cbl
= ATA_CBL_SATA
;
2474 /* After the identify sequence we can now set up the devices. We do
2475 this in the normal order so that the user doesn't get confused */
2477 ata_link_for_each_dev(dev
, &ap
->link
) {
2478 if (!ata_dev_enabled(dev
))
2481 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2482 rc
= ata_dev_configure(dev
);
2483 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2488 /* configure transfer mode */
2489 rc
= ata_set_mode(&ap
->link
, &dev
);
2493 ata_link_for_each_dev(dev
, &ap
->link
)
2494 if (ata_dev_enabled(dev
))
2497 /* no device present, disable port */
2498 ata_port_disable(ap
);
2502 tries
[dev
->devno
]--;
2506 /* eeek, something went very wrong, give up */
2507 tries
[dev
->devno
] = 0;
2511 /* give it just one more chance */
2512 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2514 if (tries
[dev
->devno
] == 1) {
2515 /* This is the last chance, better to slow
2516 * down than lose it.
2518 sata_down_spd_limit(&ap
->link
);
2519 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2523 if (!tries
[dev
->devno
])
2524 ata_dev_disable(dev
);
2530 * ata_port_probe - Mark port as enabled
2531 * @ap: Port for which we indicate enablement
2533 * Modify @ap data structure such that the system
2534 * thinks that the entire port is enabled.
2536 * LOCKING: host lock, or some other form of
2540 void ata_port_probe(struct ata_port
*ap
)
2542 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2546 * sata_print_link_status - Print SATA link status
2547 * @link: SATA link to printk link status about
2549 * This function prints link speed and status of a SATA link.
2554 void sata_print_link_status(struct ata_link
*link
)
2556 u32 sstatus
, scontrol
, tmp
;
2558 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2560 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2562 if (ata_link_online(link
)) {
2563 tmp
= (sstatus
>> 4) & 0xf;
2564 ata_link_printk(link
, KERN_INFO
,
2565 "SATA link up %s (SStatus %X SControl %X)\n",
2566 sata_spd_string(tmp
), sstatus
, scontrol
);
2568 ata_link_printk(link
, KERN_INFO
,
2569 "SATA link down (SStatus %X SControl %X)\n",
2575 * ata_dev_pair - return other device on cable
2578 * Obtain the other device on the same cable, or if none is
2579 * present NULL is returned
2582 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2584 struct ata_link
*link
= adev
->link
;
2585 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2586 if (!ata_dev_enabled(pair
))
2592 * ata_port_disable - Disable port.
2593 * @ap: Port to be disabled.
2595 * Modify @ap data structure such that the system
2596 * thinks that the entire port is disabled, and should
2597 * never attempt to probe or communicate with devices
2600 * LOCKING: host lock, or some other form of
2604 void ata_port_disable(struct ata_port
*ap
)
2606 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2607 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2608 ap
->flags
|= ATA_FLAG_DISABLED
;
2612 * sata_down_spd_limit - adjust SATA spd limit downward
2613 * @link: Link to adjust SATA spd limit for
2615 * Adjust SATA spd limit of @link downward. Note that this
2616 * function only adjusts the limit. The change must be applied
2617 * using sata_set_spd().
2620 * Inherited from caller.
2623 * 0 on success, negative errno on failure
2625 int sata_down_spd_limit(struct ata_link
*link
)
2627 u32 sstatus
, spd
, mask
;
2630 if (!sata_scr_valid(link
))
2633 /* If SCR can be read, use it to determine the current SPD.
2634 * If not, use cached value in link->sata_spd.
2636 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2638 spd
= (sstatus
>> 4) & 0xf;
2640 spd
= link
->sata_spd
;
2642 mask
= link
->sata_spd_limit
;
2646 /* unconditionally mask off the highest bit */
2647 highbit
= fls(mask
) - 1;
2648 mask
&= ~(1 << highbit
);
2650 /* Mask off all speeds higher than or equal to the current
2651 * one. Force 1.5Gbps if current SPD is not available.
2654 mask
&= (1 << (spd
- 1)) - 1;
2658 /* were we already at the bottom? */
2662 link
->sata_spd_limit
= mask
;
2664 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2665 sata_spd_string(fls(mask
)));
2670 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2672 struct ata_link
*host_link
= &link
->ap
->link
;
2673 u32 limit
, target
, spd
;
2675 limit
= link
->sata_spd_limit
;
2677 /* Don't configure downstream link faster than upstream link.
2678 * It doesn't speed up anything and some PMPs choke on such
2681 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2682 limit
&= (1 << host_link
->sata_spd
) - 1;
2684 if (limit
== UINT_MAX
)
2687 target
= fls(limit
);
2689 spd
= (*scontrol
>> 4) & 0xf;
2690 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2692 return spd
!= target
;
2696 * sata_set_spd_needed - is SATA spd configuration needed
2697 * @link: Link in question
2699 * Test whether the spd limit in SControl matches
2700 * @link->sata_spd_limit. This function is used to determine
2701 * whether hardreset is necessary to apply SATA spd
2705 * Inherited from caller.
2708 * 1 if SATA spd configuration is needed, 0 otherwise.
2710 int sata_set_spd_needed(struct ata_link
*link
)
2714 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2717 return __sata_set_spd_needed(link
, &scontrol
);
2721 * sata_set_spd - set SATA spd according to spd limit
2722 * @link: Link to set SATA spd for
2724 * Set SATA spd of @link according to sata_spd_limit.
2727 * Inherited from caller.
2730 * 0 if spd doesn't need to be changed, 1 if spd has been
2731 * changed. Negative errno if SCR registers are inaccessible.
2733 int sata_set_spd(struct ata_link
*link
)
2738 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2741 if (!__sata_set_spd_needed(link
, &scontrol
))
2744 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2751 * This mode timing computation functionality is ported over from
2752 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2755 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2756 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2757 * for UDMA6, which is currently supported only by Maxtor drives.
2759 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2762 static const struct ata_timing ata_timing
[] = {
2763 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2764 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2765 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2766 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2767 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2768 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2769 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2770 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2772 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2773 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2774 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2776 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2777 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2778 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2779 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2780 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2782 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2783 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2784 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2785 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2786 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2787 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2788 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2789 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2794 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2795 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2797 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2799 q
->setup
= EZ(t
->setup
* 1000, T
);
2800 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2801 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2802 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2803 q
->active
= EZ(t
->active
* 1000, T
);
2804 q
->recover
= EZ(t
->recover
* 1000, T
);
2805 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2806 q
->udma
= EZ(t
->udma
* 1000, UT
);
2809 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2810 struct ata_timing
*m
, unsigned int what
)
2812 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2813 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2814 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2815 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2816 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2817 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2818 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2819 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2822 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2824 const struct ata_timing
*t
= ata_timing
;
2826 while (xfer_mode
> t
->mode
)
2829 if (xfer_mode
== t
->mode
)
2834 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2835 struct ata_timing
*t
, int T
, int UT
)
2837 const struct ata_timing
*s
;
2838 struct ata_timing p
;
2844 if (!(s
= ata_timing_find_mode(speed
)))
2847 memcpy(t
, s
, sizeof(*s
));
2850 * If the drive is an EIDE drive, it can tell us it needs extended
2851 * PIO/MW_DMA cycle timing.
2854 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2855 memset(&p
, 0, sizeof(p
));
2856 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2857 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2858 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2859 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2860 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2862 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2866 * Convert the timing to bus clock counts.
2869 ata_timing_quantize(t
, t
, T
, UT
);
2872 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2873 * S.M.A.R.T * and some other commands. We have to ensure that the
2874 * DMA cycle timing is slower/equal than the fastest PIO timing.
2877 if (speed
> XFER_PIO_6
) {
2878 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2879 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2883 * Lengthen active & recovery time so that cycle time is correct.
2886 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2887 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2888 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2891 if (t
->active
+ t
->recover
< t
->cycle
) {
2892 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2893 t
->recover
= t
->cycle
- t
->active
;
2896 /* In a few cases quantisation may produce enough errors to
2897 leave t->cycle too low for the sum of active and recovery
2898 if so we must correct this */
2899 if (t
->active
+ t
->recover
> t
->cycle
)
2900 t
->cycle
= t
->active
+ t
->recover
;
2906 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2907 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
2908 * @cycle: cycle duration in ns
2910 * Return matching xfer mode for @cycle. The returned mode is of
2911 * the transfer type specified by @xfer_shift. If @cycle is too
2912 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
2913 * than the fastest known mode, the fasted mode is returned.
2919 * Matching xfer_mode, 0xff if no match found.
2921 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
2923 u8 base_mode
= 0xff, last_mode
= 0xff;
2924 const struct ata_xfer_ent
*ent
;
2925 const struct ata_timing
*t
;
2927 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
2928 if (ent
->shift
== xfer_shift
)
2929 base_mode
= ent
->base
;
2931 for (t
= ata_timing_find_mode(base_mode
);
2932 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
2933 unsigned short this_cycle
;
2935 switch (xfer_shift
) {
2937 case ATA_SHIFT_MWDMA
:
2938 this_cycle
= t
->cycle
;
2940 case ATA_SHIFT_UDMA
:
2941 this_cycle
= t
->udma
;
2947 if (cycle
> this_cycle
)
2950 last_mode
= t
->mode
;
2957 * ata_down_xfermask_limit - adjust dev xfer masks downward
2958 * @dev: Device to adjust xfer masks
2959 * @sel: ATA_DNXFER_* selector
2961 * Adjust xfer masks of @dev downward. Note that this function
2962 * does not apply the change. Invoking ata_set_mode() afterwards
2963 * will apply the limit.
2966 * Inherited from caller.
2969 * 0 on success, negative errno on failure
2971 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2974 unsigned long orig_mask
, xfer_mask
;
2975 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
2978 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2979 sel
&= ~ATA_DNXFER_QUIET
;
2981 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2984 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2987 case ATA_DNXFER_PIO
:
2988 highbit
= fls(pio_mask
) - 1;
2989 pio_mask
&= ~(1 << highbit
);
2992 case ATA_DNXFER_DMA
:
2994 highbit
= fls(udma_mask
) - 1;
2995 udma_mask
&= ~(1 << highbit
);
2998 } else if (mwdma_mask
) {
2999 highbit
= fls(mwdma_mask
) - 1;
3000 mwdma_mask
&= ~(1 << highbit
);
3006 case ATA_DNXFER_40C
:
3007 udma_mask
&= ATA_UDMA_MASK_40C
;
3010 case ATA_DNXFER_FORCE_PIO0
:
3012 case ATA_DNXFER_FORCE_PIO
:
3021 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3023 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3027 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3028 snprintf(buf
, sizeof(buf
), "%s:%s",
3029 ata_mode_string(xfer_mask
),
3030 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3032 snprintf(buf
, sizeof(buf
), "%s",
3033 ata_mode_string(xfer_mask
));
3035 ata_dev_printk(dev
, KERN_WARNING
,
3036 "limiting speed to %s\n", buf
);
3039 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3045 static int ata_dev_set_mode(struct ata_device
*dev
)
3047 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3048 unsigned int err_mask
;
3051 dev
->flags
&= ~ATA_DFLAG_PIO
;
3052 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3053 dev
->flags
|= ATA_DFLAG_PIO
;
3055 err_mask
= ata_dev_set_xfermode(dev
);
3057 /* Old CFA may refuse this command, which is just fine */
3058 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3059 err_mask
&= ~AC_ERR_DEV
;
3061 /* Some very old devices and some bad newer ones fail any kind of
3062 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3063 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3064 dev
->pio_mode
<= XFER_PIO_2
)
3065 err_mask
&= ~AC_ERR_DEV
;
3067 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3068 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3069 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3070 dev
->dma_mode
== XFER_MW_DMA_0
&&
3071 (dev
->id
[63] >> 8) & 1)
3072 err_mask
&= ~AC_ERR_DEV
;
3075 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3076 "(err_mask=0x%x)\n", err_mask
);
3080 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3081 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3082 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3086 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3087 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3089 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
3090 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
3095 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3096 * @link: link on which timings will be programmed
3097 * @r_failed_dev: out paramter for failed device
3099 * Standard implementation of the function used to tune and set
3100 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3101 * ata_dev_set_mode() fails, pointer to the failing device is
3102 * returned in @r_failed_dev.
3105 * PCI/etc. bus probe sem.
3108 * 0 on success, negative errno otherwise
3111 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3113 struct ata_port
*ap
= link
->ap
;
3114 struct ata_device
*dev
;
3115 int rc
= 0, used_dma
= 0, found
= 0;
3117 /* step 1: calculate xfer_mask */
3118 ata_link_for_each_dev(dev
, link
) {
3119 unsigned long pio_mask
, dma_mask
;
3120 unsigned int mode_mask
;
3122 if (!ata_dev_enabled(dev
))
3125 mode_mask
= ATA_DMA_MASK_ATA
;
3126 if (dev
->class == ATA_DEV_ATAPI
)
3127 mode_mask
= ATA_DMA_MASK_ATAPI
;
3128 else if (ata_id_is_cfa(dev
->id
))
3129 mode_mask
= ATA_DMA_MASK_CFA
;
3131 ata_dev_xfermask(dev
);
3133 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3134 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3136 if (libata_dma_mask
& mode_mask
)
3137 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3141 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3142 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3145 if (dev
->dma_mode
!= 0xff)
3151 /* step 2: always set host PIO timings */
3152 ata_link_for_each_dev(dev
, link
) {
3153 if (!ata_dev_enabled(dev
))
3156 if (dev
->pio_mode
== 0xff) {
3157 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3162 dev
->xfer_mode
= dev
->pio_mode
;
3163 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3164 if (ap
->ops
->set_piomode
)
3165 ap
->ops
->set_piomode(ap
, dev
);
3168 /* step 3: set host DMA timings */
3169 ata_link_for_each_dev(dev
, link
) {
3170 if (!ata_dev_enabled(dev
) || dev
->dma_mode
== 0xff)
3173 dev
->xfer_mode
= dev
->dma_mode
;
3174 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3175 if (ap
->ops
->set_dmamode
)
3176 ap
->ops
->set_dmamode(ap
, dev
);
3179 /* step 4: update devices' xfer mode */
3180 ata_link_for_each_dev(dev
, link
) {
3181 /* don't update suspended devices' xfer mode */
3182 if (!ata_dev_enabled(dev
))
3185 rc
= ata_dev_set_mode(dev
);
3190 /* Record simplex status. If we selected DMA then the other
3191 * host channels are not permitted to do so.
3193 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3194 ap
->host
->simplex_claimed
= ap
;
3198 *r_failed_dev
= dev
;
3203 * ata_tf_to_host - issue ATA taskfile to host controller
3204 * @ap: port to which command is being issued
3205 * @tf: ATA taskfile register set
3207 * Issues ATA taskfile register set to ATA host controller,
3208 * with proper synchronization with interrupt handler and
3212 * spin_lock_irqsave(host lock)
3215 static inline void ata_tf_to_host(struct ata_port
*ap
,
3216 const struct ata_taskfile
*tf
)
3218 ap
->ops
->tf_load(ap
, tf
);
3219 ap
->ops
->exec_command(ap
, tf
);
3223 * ata_busy_sleep - sleep until BSY clears, or timeout
3224 * @ap: port containing status register to be polled
3225 * @tmout_pat: impatience timeout
3226 * @tmout: overall timeout
3228 * Sleep until ATA Status register bit BSY clears,
3229 * or a timeout occurs.
3232 * Kernel thread context (may sleep).
3235 * 0 on success, -errno otherwise.
3237 int ata_busy_sleep(struct ata_port
*ap
,
3238 unsigned long tmout_pat
, unsigned long tmout
)
3240 unsigned long timer_start
, timeout
;
3243 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3244 timer_start
= jiffies
;
3245 timeout
= timer_start
+ tmout_pat
;
3246 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3247 time_before(jiffies
, timeout
)) {
3249 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3252 if (status
!= 0xff && (status
& ATA_BUSY
))
3253 ata_port_printk(ap
, KERN_WARNING
,
3254 "port is slow to respond, please be patient "
3255 "(Status 0x%x)\n", status
);
3257 timeout
= timer_start
+ tmout
;
3258 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3259 time_before(jiffies
, timeout
)) {
3261 status
= ata_chk_status(ap
);
3267 if (status
& ATA_BUSY
) {
3268 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3269 "(%lu secs, Status 0x%x)\n",
3270 tmout
/ HZ
, status
);
3278 * ata_wait_after_reset - wait before checking status after reset
3279 * @ap: port containing status register to be polled
3280 * @deadline: deadline jiffies for the operation
3282 * After reset, we need to pause a while before reading status.
3283 * Also, certain combination of controller and device report 0xff
3284 * for some duration (e.g. until SATA PHY is up and running)
3285 * which is interpreted as empty port in ATA world. This
3286 * function also waits for such devices to get out of 0xff
3290 * Kernel thread context (may sleep).
3292 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3294 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3296 if (time_before(until
, deadline
))
3299 /* Spec mandates ">= 2ms" before checking status. We wait
3300 * 150ms, because that was the magic delay used for ATAPI
3301 * devices in Hale Landis's ATADRVR, for the period of time
3302 * between when the ATA command register is written, and then
3303 * status is checked. Because waiting for "a while" before
3304 * checking status is fine, post SRST, we perform this magic
3305 * delay here as well.
3307 * Old drivers/ide uses the 2mS rule and then waits for ready.
3311 /* Wait for 0xff to clear. Some SATA devices take a long time
3312 * to clear 0xff after reset. For example, HHD424020F7SV00
3313 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3316 * Note that some PATA controllers (pata_ali) explode if
3317 * status register is read more than once when there's no
3320 if (ap
->flags
& ATA_FLAG_SATA
) {
3322 u8 status
= ata_chk_status(ap
);
3324 if (status
!= 0xff || time_after(jiffies
, deadline
))
3333 * ata_wait_ready - sleep until BSY clears, or timeout
3334 * @ap: port containing status register to be polled
3335 * @deadline: deadline jiffies for the operation
3337 * Sleep until ATA Status register bit BSY clears, or timeout
3341 * Kernel thread context (may sleep).
3344 * 0 on success, -errno otherwise.
3346 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3348 unsigned long start
= jiffies
;
3352 u8 status
= ata_chk_status(ap
);
3353 unsigned long now
= jiffies
;
3355 if (!(status
& ATA_BUSY
))
3357 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3359 if (time_after(now
, deadline
))
3362 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3363 (deadline
- now
> 3 * HZ
)) {
3364 ata_port_printk(ap
, KERN_WARNING
,
3365 "port is slow to respond, please be patient "
3366 "(Status 0x%x)\n", status
);
3374 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3375 unsigned long deadline
)
3377 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3378 unsigned int dev0
= devmask
& (1 << 0);
3379 unsigned int dev1
= devmask
& (1 << 1);
3382 /* if device 0 was found in ata_devchk, wait for its
3386 rc
= ata_wait_ready(ap
, deadline
);
3394 /* if device 1 was found in ata_devchk, wait for register
3395 * access briefly, then wait for BSY to clear.
3400 ap
->ops
->dev_select(ap
, 1);
3402 /* Wait for register access. Some ATAPI devices fail
3403 * to set nsect/lbal after reset, so don't waste too
3404 * much time on it. We're gonna wait for !BSY anyway.
3406 for (i
= 0; i
< 2; i
++) {
3409 nsect
= ioread8(ioaddr
->nsect_addr
);
3410 lbal
= ioread8(ioaddr
->lbal_addr
);
3411 if ((nsect
== 1) && (lbal
== 1))
3413 msleep(50); /* give drive a breather */
3416 rc
= ata_wait_ready(ap
, deadline
);
3424 /* is all this really necessary? */
3425 ap
->ops
->dev_select(ap
, 0);
3427 ap
->ops
->dev_select(ap
, 1);
3429 ap
->ops
->dev_select(ap
, 0);
3434 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3435 unsigned long deadline
)
3437 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3439 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3441 /* software reset. causes dev0 to be selected */
3442 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3443 udelay(20); /* FIXME: flush */
3444 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3445 udelay(20); /* FIXME: flush */
3446 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3448 /* wait a while before checking status */
3449 ata_wait_after_reset(ap
, deadline
);
3451 /* Before we perform post reset processing we want to see if
3452 * the bus shows 0xFF because the odd clown forgets the D7
3453 * pulldown resistor.
3455 if (ata_chk_status(ap
) == 0xFF)
3458 return ata_bus_post_reset(ap
, devmask
, deadline
);
3462 * ata_bus_reset - reset host port and associated ATA channel
3463 * @ap: port to reset
3465 * This is typically the first time we actually start issuing
3466 * commands to the ATA channel. We wait for BSY to clear, then
3467 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3468 * result. Determine what devices, if any, are on the channel
3469 * by looking at the device 0/1 error register. Look at the signature
3470 * stored in each device's taskfile registers, to determine if
3471 * the device is ATA or ATAPI.
3474 * PCI/etc. bus probe sem.
3475 * Obtains host lock.
3478 * Sets ATA_FLAG_DISABLED if bus reset fails.
3481 void ata_bus_reset(struct ata_port
*ap
)
3483 struct ata_device
*device
= ap
->link
.device
;
3484 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3485 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3487 unsigned int dev0
, dev1
= 0, devmask
= 0;
3490 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3492 /* determine if device 0/1 are present */
3493 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3496 dev0
= ata_devchk(ap
, 0);
3498 dev1
= ata_devchk(ap
, 1);
3502 devmask
|= (1 << 0);
3504 devmask
|= (1 << 1);
3506 /* select device 0 again */
3507 ap
->ops
->dev_select(ap
, 0);
3509 /* issue bus reset */
3510 if (ap
->flags
& ATA_FLAG_SRST
) {
3511 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3512 if (rc
&& rc
!= -ENODEV
)
3517 * determine by signature whether we have ATA or ATAPI devices
3519 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3520 if ((slave_possible
) && (err
!= 0x81))
3521 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3523 /* is double-select really necessary? */
3524 if (device
[1].class != ATA_DEV_NONE
)
3525 ap
->ops
->dev_select(ap
, 1);
3526 if (device
[0].class != ATA_DEV_NONE
)
3527 ap
->ops
->dev_select(ap
, 0);
3529 /* if no devices were detected, disable this port */
3530 if ((device
[0].class == ATA_DEV_NONE
) &&
3531 (device
[1].class == ATA_DEV_NONE
))
3534 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3535 /* set up device control for ATA_FLAG_SATA_RESET */
3536 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3543 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3544 ata_port_disable(ap
);
3550 * sata_link_debounce - debounce SATA phy status
3551 * @link: ATA link to debounce SATA phy status for
3552 * @params: timing parameters { interval, duratinon, timeout } in msec
3553 * @deadline: deadline jiffies for the operation
3555 * Make sure SStatus of @link reaches stable state, determined by
3556 * holding the same value where DET is not 1 for @duration polled
3557 * every @interval, before @timeout. Timeout constraints the
3558 * beginning of the stable state. Because DET gets stuck at 1 on
3559 * some controllers after hot unplugging, this functions waits
3560 * until timeout then returns 0 if DET is stable at 1.
3562 * @timeout is further limited by @deadline. The sooner of the
3566 * Kernel thread context (may sleep)
3569 * 0 on success, -errno on failure.
3571 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3572 unsigned long deadline
)
3574 unsigned long interval_msec
= params
[0];
3575 unsigned long duration
= msecs_to_jiffies(params
[1]);
3576 unsigned long last_jiffies
, t
;
3580 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3581 if (time_before(t
, deadline
))
3584 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3589 last_jiffies
= jiffies
;
3592 msleep(interval_msec
);
3593 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3599 if (cur
== 1 && time_before(jiffies
, deadline
))
3601 if (time_after(jiffies
, last_jiffies
+ duration
))
3606 /* unstable, start over */
3608 last_jiffies
= jiffies
;
3610 /* Check deadline. If debouncing failed, return
3611 * -EPIPE to tell upper layer to lower link speed.
3613 if (time_after(jiffies
, deadline
))
3619 * sata_link_resume - resume SATA link
3620 * @link: ATA link to resume SATA
3621 * @params: timing parameters { interval, duratinon, timeout } in msec
3622 * @deadline: deadline jiffies for the operation
3624 * Resume SATA phy @link and debounce it.
3627 * Kernel thread context (may sleep)
3630 * 0 on success, -errno on failure.
3632 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3633 unsigned long deadline
)
3638 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3641 scontrol
= (scontrol
& 0x0f0) | 0x300;
3643 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3646 /* Some PHYs react badly if SStatus is pounded immediately
3647 * after resuming. Delay 200ms before debouncing.
3651 return sata_link_debounce(link
, params
, deadline
);
3655 * ata_std_prereset - prepare for reset
3656 * @link: ATA link to be reset
3657 * @deadline: deadline jiffies for the operation
3659 * @link is about to be reset. Initialize it. Failure from
3660 * prereset makes libata abort whole reset sequence and give up
3661 * that port, so prereset should be best-effort. It does its
3662 * best to prepare for reset sequence but if things go wrong, it
3663 * should just whine, not fail.
3666 * Kernel thread context (may sleep)
3669 * 0 on success, -errno otherwise.
3671 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3673 struct ata_port
*ap
= link
->ap
;
3674 struct ata_eh_context
*ehc
= &link
->eh_context
;
3675 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3678 /* handle link resume */
3679 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3680 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3681 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3683 /* Some PMPs don't work with only SRST, force hardreset if PMP
3686 if (ap
->flags
& ATA_FLAG_PMP
)
3687 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3689 /* if we're about to do hardreset, nothing more to do */
3690 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3693 /* if SATA, resume link */
3694 if (ap
->flags
& ATA_FLAG_SATA
) {
3695 rc
= sata_link_resume(link
, timing
, deadline
);
3696 /* whine about phy resume failure but proceed */
3697 if (rc
&& rc
!= -EOPNOTSUPP
)
3698 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3699 "link for reset (errno=%d)\n", rc
);
3702 /* Wait for !BSY if the controller can wait for the first D2H
3703 * Reg FIS and we don't know that no device is attached.
3705 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3706 rc
= ata_wait_ready(ap
, deadline
);
3707 if (rc
&& rc
!= -ENODEV
) {
3708 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3709 "(errno=%d), forcing hardreset\n", rc
);
3710 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3718 * ata_std_softreset - reset host port via ATA SRST
3719 * @link: ATA link to reset
3720 * @classes: resulting classes of attached devices
3721 * @deadline: deadline jiffies for the operation
3723 * Reset host port using ATA SRST.
3726 * Kernel thread context (may sleep)
3729 * 0 on success, -errno otherwise.
3731 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3732 unsigned long deadline
)
3734 struct ata_port
*ap
= link
->ap
;
3735 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3736 unsigned int devmask
= 0;
3742 if (ata_link_offline(link
)) {
3743 classes
[0] = ATA_DEV_NONE
;
3747 /* determine if device 0/1 are present */
3748 if (ata_devchk(ap
, 0))
3749 devmask
|= (1 << 0);
3750 if (slave_possible
&& ata_devchk(ap
, 1))
3751 devmask
|= (1 << 1);
3753 /* select device 0 again */
3754 ap
->ops
->dev_select(ap
, 0);
3756 /* issue bus reset */
3757 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3758 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3759 /* if link is occupied, -ENODEV too is an error */
3760 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3761 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3765 /* determine by signature whether we have ATA or ATAPI devices */
3766 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3767 devmask
& (1 << 0), &err
);
3768 if (slave_possible
&& err
!= 0x81)
3769 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3770 devmask
& (1 << 1), &err
);
3773 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3778 * sata_link_hardreset - reset link via SATA phy reset
3779 * @link: link to reset
3780 * @timing: timing parameters { interval, duratinon, timeout } in msec
3781 * @deadline: deadline jiffies for the operation
3783 * SATA phy-reset @link using DET bits of SControl register.
3786 * Kernel thread context (may sleep)
3789 * 0 on success, -errno otherwise.
3791 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3792 unsigned long deadline
)
3799 if (sata_set_spd_needed(link
)) {
3800 /* SATA spec says nothing about how to reconfigure
3801 * spd. To be on the safe side, turn off phy during
3802 * reconfiguration. This works for at least ICH7 AHCI
3805 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3808 scontrol
= (scontrol
& 0x0f0) | 0x304;
3810 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3816 /* issue phy wake/reset */
3817 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3820 scontrol
= (scontrol
& 0x0f0) | 0x301;
3822 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3825 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3826 * 10.4.2 says at least 1 ms.
3830 /* bring link back */
3831 rc
= sata_link_resume(link
, timing
, deadline
);
3833 DPRINTK("EXIT, rc=%d\n", rc
);
3838 * sata_std_hardreset - reset host port via SATA phy reset
3839 * @link: link to reset
3840 * @class: resulting class of attached device
3841 * @deadline: deadline jiffies for the operation
3843 * SATA phy-reset host port using DET bits of SControl register,
3844 * wait for !BSY and classify the attached device.
3847 * Kernel thread context (may sleep)
3850 * 0 on success, -errno otherwise.
3852 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3853 unsigned long deadline
)
3855 struct ata_port
*ap
= link
->ap
;
3856 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3862 rc
= sata_link_hardreset(link
, timing
, deadline
);
3864 ata_link_printk(link
, KERN_ERR
,
3865 "COMRESET failed (errno=%d)\n", rc
);
3869 /* TODO: phy layer with polling, timeouts, etc. */
3870 if (ata_link_offline(link
)) {
3871 *class = ATA_DEV_NONE
;
3872 DPRINTK("EXIT, link offline\n");
3876 /* wait a while before checking status */
3877 ata_wait_after_reset(ap
, deadline
);
3879 /* If PMP is supported, we have to do follow-up SRST. Note
3880 * that some PMPs don't send D2H Reg FIS after hardreset at
3881 * all if the first port is empty. Wait for it just for a
3882 * second and request follow-up SRST.
3884 if (ap
->flags
& ATA_FLAG_PMP
) {
3885 ata_wait_ready(ap
, jiffies
+ HZ
);
3889 rc
= ata_wait_ready(ap
, deadline
);
3890 /* link occupied, -ENODEV too is an error */
3892 ata_link_printk(link
, KERN_ERR
,
3893 "COMRESET failed (errno=%d)\n", rc
);
3897 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3899 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3901 DPRINTK("EXIT, class=%u\n", *class);
3906 * ata_std_postreset - standard postreset callback
3907 * @link: the target ata_link
3908 * @classes: classes of attached devices
3910 * This function is invoked after a successful reset. Note that
3911 * the device might have been reset more than once using
3912 * different reset methods before postreset is invoked.
3915 * Kernel thread context (may sleep)
3917 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3919 struct ata_port
*ap
= link
->ap
;
3924 /* print link status */
3925 sata_print_link_status(link
);
3928 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3929 sata_scr_write(link
, SCR_ERROR
, serror
);
3930 link
->eh_info
.serror
= 0;
3932 /* is double-select really necessary? */
3933 if (classes
[0] != ATA_DEV_NONE
)
3934 ap
->ops
->dev_select(ap
, 1);
3935 if (classes
[1] != ATA_DEV_NONE
)
3936 ap
->ops
->dev_select(ap
, 0);
3938 /* bail out if no device is present */
3939 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3940 DPRINTK("EXIT, no device\n");
3944 /* set up device control */
3945 if (ap
->ioaddr
.ctl_addr
)
3946 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3952 * ata_dev_same_device - Determine whether new ID matches configured device
3953 * @dev: device to compare against
3954 * @new_class: class of the new device
3955 * @new_id: IDENTIFY page of the new device
3957 * Compare @new_class and @new_id against @dev and determine
3958 * whether @dev is the device indicated by @new_class and
3965 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3967 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3970 const u16
*old_id
= dev
->id
;
3971 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3972 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3974 if (dev
->class != new_class
) {
3975 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3976 dev
->class, new_class
);
3980 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3981 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3982 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3983 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3985 if (strcmp(model
[0], model
[1])) {
3986 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3987 "'%s' != '%s'\n", model
[0], model
[1]);
3991 if (strcmp(serial
[0], serial
[1])) {
3992 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3993 "'%s' != '%s'\n", serial
[0], serial
[1]);
4001 * ata_dev_reread_id - Re-read IDENTIFY data
4002 * @dev: target ATA device
4003 * @readid_flags: read ID flags
4005 * Re-read IDENTIFY page and make sure @dev is still attached to
4009 * Kernel thread context (may sleep)
4012 * 0 on success, negative errno otherwise
4014 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4016 unsigned int class = dev
->class;
4017 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4021 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4025 /* is the device still there? */
4026 if (!ata_dev_same_device(dev
, class, id
))
4029 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4034 * ata_dev_revalidate - Revalidate ATA device
4035 * @dev: device to revalidate
4036 * @new_class: new class code
4037 * @readid_flags: read ID flags
4039 * Re-read IDENTIFY page, make sure @dev is still attached to the
4040 * port and reconfigure it according to the new IDENTIFY page.
4043 * Kernel thread context (may sleep)
4046 * 0 on success, negative errno otherwise
4048 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4049 unsigned int readid_flags
)
4051 u64 n_sectors
= dev
->n_sectors
;
4054 if (!ata_dev_enabled(dev
))
4057 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4058 if (ata_class_enabled(new_class
) &&
4059 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4060 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4061 dev
->class, new_class
);
4067 rc
= ata_dev_reread_id(dev
, readid_flags
);
4071 /* configure device according to the new ID */
4072 rc
= ata_dev_configure(dev
);
4076 /* verify n_sectors hasn't changed */
4077 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4078 dev
->n_sectors
!= n_sectors
) {
4079 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4081 (unsigned long long)n_sectors
,
4082 (unsigned long long)dev
->n_sectors
);
4084 /* restore original n_sectors */
4085 dev
->n_sectors
= n_sectors
;
4094 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4098 struct ata_blacklist_entry
{
4099 const char *model_num
;
4100 const char *model_rev
;
4101 unsigned long horkage
;
4104 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4105 /* Devices with DMA related problems under Linux */
4106 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4107 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4108 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4109 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4110 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4111 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4112 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4113 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4114 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4115 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4116 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4117 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4118 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4119 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4120 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4121 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4122 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4123 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4124 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4125 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4126 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4127 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4128 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4129 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4130 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4131 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4132 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4133 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4134 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4135 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4136 /* Odd clown on sil3726/4726 PMPs */
4137 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
4138 ATA_HORKAGE_SKIP_PM
},
4140 /* Weird ATAPI devices */
4141 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4143 /* Devices we expect to fail diagnostics */
4145 /* Devices where NCQ should be avoided */
4147 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4148 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4149 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4150 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4152 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4153 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4154 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
4155 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
4156 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4157 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4159 /* Blacklist entries taken from Silicon Image 3124/3132
4160 Windows driver .inf file - also several Linux problem reports */
4161 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4162 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4163 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4165 /* devices which puke on READ_NATIVE_MAX */
4166 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4167 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4168 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4169 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4171 /* Devices which report 1 sector over size HPA */
4172 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4173 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4175 /* Devices which get the IVB wrong */
4176 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4177 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4178 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4179 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4180 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4186 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4192 * check for trailing wildcard: *\0
4194 p
= strchr(patt
, wildchar
);
4195 if (p
&& ((*(p
+ 1)) == 0))
4206 return strncmp(patt
, name
, len
);
4209 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4211 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4212 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4213 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4215 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4216 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4218 while (ad
->model_num
) {
4219 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4220 if (ad
->model_rev
== NULL
)
4222 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4230 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4232 /* We don't support polling DMA.
4233 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4234 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4236 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4237 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4239 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4243 * ata_is_40wire - check drive side detection
4246 * Perform drive side detection decoding, allowing for device vendors
4247 * who can't follow the documentation.
4250 static int ata_is_40wire(struct ata_device
*dev
)
4252 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4253 return ata_drive_40wire_relaxed(dev
->id
);
4254 return ata_drive_40wire(dev
->id
);
4258 * ata_dev_xfermask - Compute supported xfermask of the given device
4259 * @dev: Device to compute xfermask for
4261 * Compute supported xfermask of @dev and store it in
4262 * dev->*_mask. This function is responsible for applying all
4263 * known limits including host controller limits, device
4269 static void ata_dev_xfermask(struct ata_device
*dev
)
4271 struct ata_link
*link
= dev
->link
;
4272 struct ata_port
*ap
= link
->ap
;
4273 struct ata_host
*host
= ap
->host
;
4274 unsigned long xfer_mask
;
4276 /* controller modes available */
4277 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4278 ap
->mwdma_mask
, ap
->udma_mask
);
4280 /* drive modes available */
4281 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4282 dev
->mwdma_mask
, dev
->udma_mask
);
4283 xfer_mask
&= ata_id_xfermask(dev
->id
);
4286 * CFA Advanced TrueIDE timings are not allowed on a shared
4289 if (ata_dev_pair(dev
)) {
4290 /* No PIO5 or PIO6 */
4291 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4292 /* No MWDMA3 or MWDMA 4 */
4293 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4296 if (ata_dma_blacklisted(dev
)) {
4297 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4298 ata_dev_printk(dev
, KERN_WARNING
,
4299 "device is on DMA blacklist, disabling DMA\n");
4302 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4303 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4304 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4305 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4306 "other device, disabling DMA\n");
4309 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4310 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4312 if (ap
->ops
->mode_filter
)
4313 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4315 /* Apply cable rule here. Don't apply it early because when
4316 * we handle hot plug the cable type can itself change.
4317 * Check this last so that we know if the transfer rate was
4318 * solely limited by the cable.
4319 * Unknown or 80 wire cables reported host side are checked
4320 * drive side as well. Cases where we know a 40wire cable
4321 * is used safely for 80 are not checked here.
4323 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4324 /* UDMA/44 or higher would be available */
4325 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4326 (ata_is_40wire(dev
) &&
4327 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4328 ap
->cbl
== ATA_CBL_PATA80
))) {
4329 ata_dev_printk(dev
, KERN_WARNING
,
4330 "limited to UDMA/33 due to 40-wire cable\n");
4331 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4334 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4335 &dev
->mwdma_mask
, &dev
->udma_mask
);
4339 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4340 * @dev: Device to which command will be sent
4342 * Issue SET FEATURES - XFER MODE command to device @dev
4346 * PCI/etc. bus probe sem.
4349 * 0 on success, AC_ERR_* mask otherwise.
4352 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4354 struct ata_taskfile tf
;
4355 unsigned int err_mask
;
4357 /* set up set-features taskfile */
4358 DPRINTK("set features - xfer mode\n");
4360 /* Some controllers and ATAPI devices show flaky interrupt
4361 * behavior after setting xfer mode. Use polling instead.
4363 ata_tf_init(dev
, &tf
);
4364 tf
.command
= ATA_CMD_SET_FEATURES
;
4365 tf
.feature
= SETFEATURES_XFER
;
4366 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4367 tf
.protocol
= ATA_PROT_NODATA
;
4368 /* If we are using IORDY we must send the mode setting command */
4369 if (ata_pio_need_iordy(dev
))
4370 tf
.nsect
= dev
->xfer_mode
;
4371 /* If the device has IORDY and the controller does not - turn it off */
4372 else if (ata_id_has_iordy(dev
->id
))
4374 else /* In the ancient relic department - skip all of this */
4377 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4379 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4383 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4384 * @dev: Device to which command will be sent
4385 * @enable: Whether to enable or disable the feature
4386 * @feature: The sector count represents the feature to set
4388 * Issue SET FEATURES - SATA FEATURES command to device @dev
4389 * on port @ap with sector count
4392 * PCI/etc. bus probe sem.
4395 * 0 on success, AC_ERR_* mask otherwise.
4397 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4400 struct ata_taskfile tf
;
4401 unsigned int err_mask
;
4403 /* set up set-features taskfile */
4404 DPRINTK("set features - SATA features\n");
4406 ata_tf_init(dev
, &tf
);
4407 tf
.command
= ATA_CMD_SET_FEATURES
;
4408 tf
.feature
= enable
;
4409 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4410 tf
.protocol
= ATA_PROT_NODATA
;
4413 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4415 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4420 * ata_dev_init_params - Issue INIT DEV PARAMS command
4421 * @dev: Device to which command will be sent
4422 * @heads: Number of heads (taskfile parameter)
4423 * @sectors: Number of sectors (taskfile parameter)
4426 * Kernel thread context (may sleep)
4429 * 0 on success, AC_ERR_* mask otherwise.
4431 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4432 u16 heads
, u16 sectors
)
4434 struct ata_taskfile tf
;
4435 unsigned int err_mask
;
4437 /* Number of sectors per track 1-255. Number of heads 1-16 */
4438 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4439 return AC_ERR_INVALID
;
4441 /* set up init dev params taskfile */
4442 DPRINTK("init dev params \n");
4444 ata_tf_init(dev
, &tf
);
4445 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4446 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4447 tf
.protocol
= ATA_PROT_NODATA
;
4449 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4451 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4452 /* A clean abort indicates an original or just out of spec drive
4453 and we should continue as we issue the setup based on the
4454 drive reported working geometry */
4455 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4458 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4463 * ata_sg_clean - Unmap DMA memory associated with command
4464 * @qc: Command containing DMA memory to be released
4466 * Unmap all mapped DMA memory associated with this command.
4469 * spin_lock_irqsave(host lock)
4471 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4473 struct ata_port
*ap
= qc
->ap
;
4474 struct scatterlist
*sg
= qc
->__sg
;
4475 int dir
= qc
->dma_dir
;
4476 void *pad_buf
= NULL
;
4478 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4479 WARN_ON(sg
== NULL
);
4481 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4482 WARN_ON(qc
->n_elem
> 1);
4484 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4486 /* if we padded the buffer out to 32-bit bound, and data
4487 * xfer direction is from-device, we must copy from the
4488 * pad buffer back into the supplied buffer
4490 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4491 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4493 if (qc
->flags
& ATA_QCFLAG_SG
) {
4495 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4496 /* restore last sg */
4497 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4499 struct scatterlist
*psg
= &qc
->pad_sgent
;
4500 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4501 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4502 kunmap_atomic(addr
, KM_IRQ0
);
4506 dma_unmap_single(ap
->dev
,
4507 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4510 sg
->length
+= qc
->pad_len
;
4512 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4513 pad_buf
, qc
->pad_len
);
4516 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4521 * ata_fill_sg - Fill PCI IDE PRD table
4522 * @qc: Metadata associated with taskfile to be transferred
4524 * Fill PCI IDE PRD (scatter-gather) table with segments
4525 * associated with the current disk command.
4528 * spin_lock_irqsave(host lock)
4531 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4533 struct ata_port
*ap
= qc
->ap
;
4534 struct scatterlist
*sg
;
4537 WARN_ON(qc
->__sg
== NULL
);
4538 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4541 ata_for_each_sg(sg
, qc
) {
4545 /* determine if physical DMA addr spans 64K boundary.
4546 * Note h/w doesn't support 64-bit, so we unconditionally
4547 * truncate dma_addr_t to u32.
4549 addr
= (u32
) sg_dma_address(sg
);
4550 sg_len
= sg_dma_len(sg
);
4553 offset
= addr
& 0xffff;
4555 if ((offset
+ sg_len
) > 0x10000)
4556 len
= 0x10000 - offset
;
4558 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4559 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4560 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4569 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4573 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4574 * @qc: Metadata associated with taskfile to be transferred
4576 * Fill PCI IDE PRD (scatter-gather) table with segments
4577 * associated with the current disk command. Perform the fill
4578 * so that we avoid writing any length 64K records for
4579 * controllers that don't follow the spec.
4582 * spin_lock_irqsave(host lock)
4585 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4587 struct ata_port
*ap
= qc
->ap
;
4588 struct scatterlist
*sg
;
4591 WARN_ON(qc
->__sg
== NULL
);
4592 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4595 ata_for_each_sg(sg
, qc
) {
4597 u32 sg_len
, len
, blen
;
4599 /* determine if physical DMA addr spans 64K boundary.
4600 * Note h/w doesn't support 64-bit, so we unconditionally
4601 * truncate dma_addr_t to u32.
4603 addr
= (u32
) sg_dma_address(sg
);
4604 sg_len
= sg_dma_len(sg
);
4607 offset
= addr
& 0xffff;
4609 if ((offset
+ sg_len
) > 0x10000)
4610 len
= 0x10000 - offset
;
4612 blen
= len
& 0xffff;
4613 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4615 /* Some PATA chipsets like the CS5530 can't
4616 cope with 0x0000 meaning 64K as the spec says */
4617 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4619 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4621 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4622 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4631 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4635 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4636 * @qc: Metadata associated with taskfile to check
4638 * Allow low-level driver to filter ATA PACKET commands, returning
4639 * a status indicating whether or not it is OK to use DMA for the
4640 * supplied PACKET command.
4643 * spin_lock_irqsave(host lock)
4645 * RETURNS: 0 when ATAPI DMA can be used
4648 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4650 struct ata_port
*ap
= qc
->ap
;
4652 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4653 * few ATAPI devices choke on such DMA requests.
4655 if (unlikely(qc
->nbytes
& 15))
4658 if (ap
->ops
->check_atapi_dma
)
4659 return ap
->ops
->check_atapi_dma(qc
);
4665 * atapi_qc_may_overflow - Check whether data transfer may overflow
4666 * @qc: ATA command in question
4668 * ATAPI commands which transfer variable length data to host
4669 * might overflow due to application error or hardare bug. This
4670 * function checks whether overflow should be drained and ignored
4677 * 1 if @qc may overflow; otherwise, 0.
4679 static int atapi_qc_may_overflow(struct ata_queued_cmd
*qc
)
4681 if (qc
->tf
.protocol
!= ATAPI_PROT_PIO
&&
4682 qc
->tf
.protocol
!= ATAPI_PROT_DMA
)
4685 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4688 switch (qc
->cdb
[0]) {
4694 case GPCMD_READ_CD_MSF
:
4702 * ata_std_qc_defer - Check whether a qc needs to be deferred
4703 * @qc: ATA command in question
4705 * Non-NCQ commands cannot run with any other command, NCQ or
4706 * not. As upper layer only knows the queue depth, we are
4707 * responsible for maintaining exclusion. This function checks
4708 * whether a new command @qc can be issued.
4711 * spin_lock_irqsave(host lock)
4714 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4716 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4718 struct ata_link
*link
= qc
->dev
->link
;
4720 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4721 if (!ata_tag_valid(link
->active_tag
))
4724 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4728 return ATA_DEFER_LINK
;
4732 * ata_qc_prep - Prepare taskfile for submission
4733 * @qc: Metadata associated with taskfile to be prepared
4735 * Prepare ATA taskfile for submission.
4738 * spin_lock_irqsave(host lock)
4740 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4742 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4749 * ata_dumb_qc_prep - Prepare taskfile for submission
4750 * @qc: Metadata associated with taskfile to be prepared
4752 * Prepare ATA taskfile for submission.
4755 * spin_lock_irqsave(host lock)
4757 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4759 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4762 ata_fill_sg_dumb(qc
);
4765 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4768 * ata_sg_init_one - Associate command with memory buffer
4769 * @qc: Command to be associated
4770 * @buf: Memory buffer
4771 * @buflen: Length of memory buffer, in bytes.
4773 * Initialize the data-related elements of queued_cmd @qc
4774 * to point to a single memory buffer, @buf of byte length @buflen.
4777 * spin_lock_irqsave(host lock)
4780 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4782 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4784 qc
->__sg
= &qc
->sgent
;
4786 qc
->orig_n_elem
= 1;
4788 qc
->nbytes
= buflen
;
4789 qc
->cursg
= qc
->__sg
;
4791 sg_init_one(&qc
->sgent
, buf
, buflen
);
4795 * ata_sg_init - Associate command with scatter-gather table.
4796 * @qc: Command to be associated
4797 * @sg: Scatter-gather table.
4798 * @n_elem: Number of elements in s/g table.
4800 * Initialize the data-related elements of queued_cmd @qc
4801 * to point to a scatter-gather table @sg, containing @n_elem
4805 * spin_lock_irqsave(host lock)
4808 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4809 unsigned int n_elem
)
4811 qc
->flags
|= ATA_QCFLAG_SG
;
4813 qc
->n_elem
= n_elem
;
4814 qc
->orig_n_elem
= n_elem
;
4815 qc
->cursg
= qc
->__sg
;
4819 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4820 * @qc: Command with memory buffer to be mapped.
4822 * DMA-map the memory buffer associated with queued_cmd @qc.
4825 * spin_lock_irqsave(host lock)
4828 * Zero on success, negative on error.
4831 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4833 struct ata_port
*ap
= qc
->ap
;
4834 int dir
= qc
->dma_dir
;
4835 struct scatterlist
*sg
= qc
->__sg
;
4836 dma_addr_t dma_address
;
4839 /* we must lengthen transfers to end on a 32-bit boundary */
4840 qc
->pad_len
= sg
->length
& 3;
4842 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4843 struct scatterlist
*psg
= &qc
->pad_sgent
;
4845 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4847 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4849 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4850 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4853 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4854 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4856 sg
->length
-= qc
->pad_len
;
4857 if (sg
->length
== 0)
4860 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4861 sg
->length
, qc
->pad_len
);
4869 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4871 if (dma_mapping_error(dma_address
)) {
4873 sg
->length
+= qc
->pad_len
;
4877 sg_dma_address(sg
) = dma_address
;
4878 sg_dma_len(sg
) = sg
->length
;
4881 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4882 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4888 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4889 * @qc: Command with scatter-gather table to be mapped.
4891 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4894 * spin_lock_irqsave(host lock)
4897 * Zero on success, negative on error.
4901 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4903 struct ata_port
*ap
= qc
->ap
;
4904 struct scatterlist
*sg
= qc
->__sg
;
4905 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4906 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4908 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4909 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4911 /* we must lengthen transfers to end on a 32-bit boundary */
4912 qc
->pad_len
= lsg
->length
& 3;
4914 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4915 struct scatterlist
*psg
= &qc
->pad_sgent
;
4916 unsigned int offset
;
4918 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4920 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4923 * psg->page/offset are used to copy to-be-written
4924 * data in this function or read data in ata_sg_clean.
4926 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4927 sg_init_table(psg
, 1);
4928 sg_set_page(psg
, nth_page(sg_page(lsg
), offset
>> PAGE_SHIFT
),
4929 qc
->pad_len
, offset_in_page(offset
));
4931 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4932 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4933 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4934 kunmap_atomic(addr
, KM_IRQ0
);
4937 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4938 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4940 lsg
->length
-= qc
->pad_len
;
4941 if (lsg
->length
== 0)
4944 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4945 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4948 pre_n_elem
= qc
->n_elem
;
4949 if (trim_sg
&& pre_n_elem
)
4958 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4960 /* restore last sg */
4961 lsg
->length
+= qc
->pad_len
;
4965 DPRINTK("%d sg elements mapped\n", n_elem
);
4968 qc
->n_elem
= n_elem
;
4974 * swap_buf_le16 - swap halves of 16-bit words in place
4975 * @buf: Buffer to swap
4976 * @buf_words: Number of 16-bit words in buffer.
4978 * Swap halves of 16-bit words if needed to convert from
4979 * little-endian byte order to native cpu byte order, or
4983 * Inherited from caller.
4985 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4990 for (i
= 0; i
< buf_words
; i
++)
4991 buf
[i
] = le16_to_cpu(buf
[i
]);
4992 #endif /* __BIG_ENDIAN */
4996 * ata_data_xfer - Transfer data by PIO
4997 * @dev: device to target
4999 * @buflen: buffer length
5000 * @write_data: read/write
5002 * Transfer data from/to the device data register by PIO.
5005 * Inherited from caller.
5010 unsigned int ata_data_xfer(struct ata_device
*dev
, unsigned char *buf
,
5011 unsigned int buflen
, int rw
)
5013 struct ata_port
*ap
= dev
->link
->ap
;
5014 void __iomem
*data_addr
= ap
->ioaddr
.data_addr
;
5015 unsigned int words
= buflen
>> 1;
5017 /* Transfer multiple of 2 bytes */
5019 ioread16_rep(data_addr
, buf
, words
);
5021 iowrite16_rep(data_addr
, buf
, words
);
5023 /* Transfer trailing 1 byte, if any. */
5024 if (unlikely(buflen
& 0x01)) {
5025 u16 align_buf
[1] = { 0 };
5026 unsigned char *trailing_buf
= buf
+ buflen
- 1;
5029 align_buf
[0] = cpu_to_le16(ioread16(data_addr
));
5030 memcpy(trailing_buf
, align_buf
, 1);
5032 memcpy(align_buf
, trailing_buf
, 1);
5033 iowrite16(le16_to_cpu(align_buf
[0]), data_addr
);
5042 * ata_data_xfer_noirq - Transfer data by PIO
5043 * @dev: device to target
5045 * @buflen: buffer length
5046 * @write_data: read/write
5048 * Transfer data from/to the device data register by PIO. Do the
5049 * transfer with interrupts disabled.
5052 * Inherited from caller.
5057 unsigned int ata_data_xfer_noirq(struct ata_device
*dev
, unsigned char *buf
,
5058 unsigned int buflen
, int rw
)
5060 unsigned long flags
;
5061 unsigned int consumed
;
5063 local_irq_save(flags
);
5064 consumed
= ata_data_xfer(dev
, buf
, buflen
, rw
);
5065 local_irq_restore(flags
);
5072 * ata_pio_sector - Transfer a sector of data.
5073 * @qc: Command on going
5075 * Transfer qc->sect_size bytes of data from/to the ATA device.
5078 * Inherited from caller.
5081 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
5083 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5084 struct ata_port
*ap
= qc
->ap
;
5086 unsigned int offset
;
5089 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
5090 ap
->hsm_task_state
= HSM_ST_LAST
;
5092 page
= sg_page(qc
->cursg
);
5093 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
5095 /* get the current page and offset */
5096 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5097 offset
%= PAGE_SIZE
;
5099 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5101 if (PageHighMem(page
)) {
5102 unsigned long flags
;
5104 /* FIXME: use a bounce buffer */
5105 local_irq_save(flags
);
5106 buf
= kmap_atomic(page
, KM_IRQ0
);
5108 /* do the actual data transfer */
5109 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5111 kunmap_atomic(buf
, KM_IRQ0
);
5112 local_irq_restore(flags
);
5114 buf
= page_address(page
);
5115 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5118 qc
->curbytes
+= qc
->sect_size
;
5119 qc
->cursg_ofs
+= qc
->sect_size
;
5121 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
5122 qc
->cursg
= sg_next(qc
->cursg
);
5128 * ata_pio_sectors - Transfer one or many sectors.
5129 * @qc: Command on going
5131 * Transfer one or many sectors of data from/to the
5132 * ATA device for the DRQ request.
5135 * Inherited from caller.
5138 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
5140 if (is_multi_taskfile(&qc
->tf
)) {
5141 /* READ/WRITE MULTIPLE */
5144 WARN_ON(qc
->dev
->multi_count
== 0);
5146 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
5147 qc
->dev
->multi_count
);
5153 ata_altstatus(qc
->ap
); /* flush */
5157 * atapi_send_cdb - Write CDB bytes to hardware
5158 * @ap: Port to which ATAPI device is attached.
5159 * @qc: Taskfile currently active
5161 * When device has indicated its readiness to accept
5162 * a CDB, this function is called. Send the CDB.
5168 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5171 DPRINTK("send cdb\n");
5172 WARN_ON(qc
->dev
->cdb_len
< 12);
5174 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
5175 ata_altstatus(ap
); /* flush */
5177 switch (qc
->tf
.protocol
) {
5178 case ATAPI_PROT_PIO
:
5179 ap
->hsm_task_state
= HSM_ST
;
5181 case ATAPI_PROT_NODATA
:
5182 ap
->hsm_task_state
= HSM_ST_LAST
;
5184 case ATAPI_PROT_DMA
:
5185 ap
->hsm_task_state
= HSM_ST_LAST
;
5186 /* initiate bmdma */
5187 ap
->ops
->bmdma_start(qc
);
5193 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5194 * @qc: Command on going
5195 * @bytes: number of bytes
5197 * Transfer Transfer data from/to the ATAPI device.
5200 * Inherited from caller.
5203 static int __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
5205 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5206 struct ata_port
*ap
= qc
->ap
;
5207 struct ata_eh_info
*ehi
= &qc
->dev
->link
->eh_info
;
5208 struct scatterlist
*sg
;
5211 unsigned int offset
, count
;
5215 if (unlikely(!sg
)) {
5217 * The end of qc->sg is reached and the device expects
5218 * more data to transfer. In order not to overrun qc->sg
5219 * and fulfill length specified in the byte count register,
5220 * - for read case, discard trailing data from the device
5221 * - for write case, padding zero data to the device
5223 u16 pad_buf
[1] = { 0 };
5226 if (bytes
> qc
->curbytes
- qc
->nbytes
+ ATAPI_MAX_DRAIN
) {
5227 ata_ehi_push_desc(ehi
, "too much trailing data "
5228 "buf=%u cur=%u bytes=%u",
5229 qc
->nbytes
, qc
->curbytes
, bytes
);
5233 /* overflow is exptected for misc ATAPI commands */
5234 if (bytes
&& !atapi_qc_may_overflow(qc
))
5235 ata_dev_printk(qc
->dev
, KERN_WARNING
, "ATAPI %u bytes "
5236 "trailing data (cdb=%02x nbytes=%u)\n",
5237 bytes
, qc
->cdb
[0], qc
->nbytes
);
5239 for (i
= 0; i
< (bytes
+ 1) / 2; i
++)
5240 ap
->ops
->data_xfer(qc
->dev
, (unsigned char *)pad_buf
, 2, do_write
);
5242 qc
->curbytes
+= bytes
;
5248 offset
= sg
->offset
+ qc
->cursg_ofs
;
5250 /* get the current page and offset */
5251 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5252 offset
%= PAGE_SIZE
;
5254 /* don't overrun current sg */
5255 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5257 /* don't cross page boundaries */
5258 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5260 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5262 if (PageHighMem(page
)) {
5263 unsigned long flags
;
5265 /* FIXME: use bounce buffer */
5266 local_irq_save(flags
);
5267 buf
= kmap_atomic(page
, KM_IRQ0
);
5269 /* do the actual data transfer */
5270 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5272 kunmap_atomic(buf
, KM_IRQ0
);
5273 local_irq_restore(flags
);
5275 buf
= page_address(page
);
5276 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5280 if ((count
& 1) && bytes
)
5282 qc
->curbytes
+= count
;
5283 qc
->cursg_ofs
+= count
;
5285 if (qc
->cursg_ofs
== sg
->length
) {
5286 qc
->cursg
= sg_next(qc
->cursg
);
5297 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5298 * @qc: Command on going
5300 * Transfer Transfer data from/to the ATAPI device.
5303 * Inherited from caller.
5306 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5308 struct ata_port
*ap
= qc
->ap
;
5309 struct ata_device
*dev
= qc
->dev
;
5310 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5311 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5313 /* Abuse qc->result_tf for temp storage of intermediate TF
5314 * here to save some kernel stack usage.
5315 * For normal completion, qc->result_tf is not relevant. For
5316 * error, qc->result_tf is later overwritten by ata_qc_complete().
5317 * So, the correctness of qc->result_tf is not affected.
5319 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5320 ireason
= qc
->result_tf
.nsect
;
5321 bc_lo
= qc
->result_tf
.lbam
;
5322 bc_hi
= qc
->result_tf
.lbah
;
5323 bytes
= (bc_hi
<< 8) | bc_lo
;
5325 /* shall be cleared to zero, indicating xfer of data */
5326 if (unlikely(ireason
& (1 << 0)))
5329 /* make sure transfer direction matches expected */
5330 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5331 if (unlikely(do_write
!= i_write
))
5334 if (unlikely(!bytes
))
5337 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5339 if (__atapi_pio_bytes(qc
, bytes
))
5341 ata_altstatus(ap
); /* flush */
5346 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5347 qc
->err_mask
|= AC_ERR_HSM
;
5348 ap
->hsm_task_state
= HSM_ST_ERR
;
5352 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5353 * @ap: the target ata_port
5357 * 1 if ok in workqueue, 0 otherwise.
5360 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5362 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5365 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5366 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5367 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5370 if (ata_is_atapi(qc
->tf
.protocol
) &&
5371 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5379 * ata_hsm_qc_complete - finish a qc running on standard HSM
5380 * @qc: Command to complete
5381 * @in_wq: 1 if called from workqueue, 0 otherwise
5383 * Finish @qc which is running on standard HSM.
5386 * If @in_wq is zero, spin_lock_irqsave(host lock).
5387 * Otherwise, none on entry and grabs host lock.
5389 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5391 struct ata_port
*ap
= qc
->ap
;
5392 unsigned long flags
;
5394 if (ap
->ops
->error_handler
) {
5396 spin_lock_irqsave(ap
->lock
, flags
);
5398 /* EH might have kicked in while host lock is
5401 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5403 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5404 ap
->ops
->irq_on(ap
);
5405 ata_qc_complete(qc
);
5407 ata_port_freeze(ap
);
5410 spin_unlock_irqrestore(ap
->lock
, flags
);
5412 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5413 ata_qc_complete(qc
);
5415 ata_port_freeze(ap
);
5419 spin_lock_irqsave(ap
->lock
, flags
);
5420 ap
->ops
->irq_on(ap
);
5421 ata_qc_complete(qc
);
5422 spin_unlock_irqrestore(ap
->lock
, flags
);
5424 ata_qc_complete(qc
);
5429 * ata_hsm_move - move the HSM to the next state.
5430 * @ap: the target ata_port
5432 * @status: current device status
5433 * @in_wq: 1 if called from workqueue, 0 otherwise
5436 * 1 when poll next status needed, 0 otherwise.
5438 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5439 u8 status
, int in_wq
)
5441 unsigned long flags
= 0;
5444 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5446 /* Make sure ata_qc_issue_prot() does not throw things
5447 * like DMA polling into the workqueue. Notice that
5448 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5450 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5453 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5454 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5456 switch (ap
->hsm_task_state
) {
5458 /* Send first data block or PACKET CDB */
5460 /* If polling, we will stay in the work queue after
5461 * sending the data. Otherwise, interrupt handler
5462 * takes over after sending the data.
5464 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5466 /* check device status */
5467 if (unlikely((status
& ATA_DRQ
) == 0)) {
5468 /* handle BSY=0, DRQ=0 as error */
5469 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5470 /* device stops HSM for abort/error */
5471 qc
->err_mask
|= AC_ERR_DEV
;
5473 /* HSM violation. Let EH handle this */
5474 qc
->err_mask
|= AC_ERR_HSM
;
5476 ap
->hsm_task_state
= HSM_ST_ERR
;
5480 /* Device should not ask for data transfer (DRQ=1)
5481 * when it finds something wrong.
5482 * We ignore DRQ here and stop the HSM by
5483 * changing hsm_task_state to HSM_ST_ERR and
5484 * let the EH abort the command or reset the device.
5486 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5487 /* Some ATAPI tape drives forget to clear the ERR bit
5488 * when doing the next command (mostly request sense).
5489 * We ignore ERR here to workaround and proceed sending
5492 if (!(qc
->dev
->horkage
& ATA_HORKAGE_STUCK_ERR
)) {
5493 ata_port_printk(ap
, KERN_WARNING
,
5494 "DRQ=1 with device error, "
5495 "dev_stat 0x%X\n", status
);
5496 qc
->err_mask
|= AC_ERR_HSM
;
5497 ap
->hsm_task_state
= HSM_ST_ERR
;
5502 /* Send the CDB (atapi) or the first data block (ata pio out).
5503 * During the state transition, interrupt handler shouldn't
5504 * be invoked before the data transfer is complete and
5505 * hsm_task_state is changed. Hence, the following locking.
5508 spin_lock_irqsave(ap
->lock
, flags
);
5510 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5511 /* PIO data out protocol.
5512 * send first data block.
5515 /* ata_pio_sectors() might change the state
5516 * to HSM_ST_LAST. so, the state is changed here
5517 * before ata_pio_sectors().
5519 ap
->hsm_task_state
= HSM_ST
;
5520 ata_pio_sectors(qc
);
5523 atapi_send_cdb(ap
, qc
);
5526 spin_unlock_irqrestore(ap
->lock
, flags
);
5528 /* if polling, ata_pio_task() handles the rest.
5529 * otherwise, interrupt handler takes over from here.
5534 /* complete command or read/write the data register */
5535 if (qc
->tf
.protocol
== ATAPI_PROT_PIO
) {
5536 /* ATAPI PIO protocol */
5537 if ((status
& ATA_DRQ
) == 0) {
5538 /* No more data to transfer or device error.
5539 * Device error will be tagged in HSM_ST_LAST.
5541 ap
->hsm_task_state
= HSM_ST_LAST
;
5545 /* Device should not ask for data transfer (DRQ=1)
5546 * when it finds something wrong.
5547 * We ignore DRQ here and stop the HSM by
5548 * changing hsm_task_state to HSM_ST_ERR and
5549 * let the EH abort the command or reset the device.
5551 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5552 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5553 "device error, dev_stat 0x%X\n",
5555 qc
->err_mask
|= AC_ERR_HSM
;
5556 ap
->hsm_task_state
= HSM_ST_ERR
;
5560 atapi_pio_bytes(qc
);
5562 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5563 /* bad ireason reported by device */
5567 /* ATA PIO protocol */
5568 if (unlikely((status
& ATA_DRQ
) == 0)) {
5569 /* handle BSY=0, DRQ=0 as error */
5570 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5571 /* device stops HSM for abort/error */
5572 qc
->err_mask
|= AC_ERR_DEV
;
5574 /* HSM violation. Let EH handle this.
5575 * Phantom devices also trigger this
5576 * condition. Mark hint.
5578 qc
->err_mask
|= AC_ERR_HSM
|
5581 ap
->hsm_task_state
= HSM_ST_ERR
;
5585 /* For PIO reads, some devices may ask for
5586 * data transfer (DRQ=1) alone with ERR=1.
5587 * We respect DRQ here and transfer one
5588 * block of junk data before changing the
5589 * hsm_task_state to HSM_ST_ERR.
5591 * For PIO writes, ERR=1 DRQ=1 doesn't make
5592 * sense since the data block has been
5593 * transferred to the device.
5595 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5596 /* data might be corrputed */
5597 qc
->err_mask
|= AC_ERR_DEV
;
5599 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5600 ata_pio_sectors(qc
);
5601 status
= ata_wait_idle(ap
);
5604 if (status
& (ATA_BUSY
| ATA_DRQ
))
5605 qc
->err_mask
|= AC_ERR_HSM
;
5607 /* ata_pio_sectors() might change the
5608 * state to HSM_ST_LAST. so, the state
5609 * is changed after ata_pio_sectors().
5611 ap
->hsm_task_state
= HSM_ST_ERR
;
5615 ata_pio_sectors(qc
);
5617 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5618 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5620 status
= ata_wait_idle(ap
);
5629 if (unlikely(!ata_ok(status
))) {
5630 qc
->err_mask
|= __ac_err_mask(status
);
5631 ap
->hsm_task_state
= HSM_ST_ERR
;
5635 /* no more data to transfer */
5636 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5637 ap
->print_id
, qc
->dev
->devno
, status
);
5639 WARN_ON(qc
->err_mask
);
5641 ap
->hsm_task_state
= HSM_ST_IDLE
;
5643 /* complete taskfile transaction */
5644 ata_hsm_qc_complete(qc
, in_wq
);
5650 /* make sure qc->err_mask is available to
5651 * know what's wrong and recover
5653 WARN_ON(qc
->err_mask
== 0);
5655 ap
->hsm_task_state
= HSM_ST_IDLE
;
5657 /* complete taskfile transaction */
5658 ata_hsm_qc_complete(qc
, in_wq
);
5670 static void ata_pio_task(struct work_struct
*work
)
5672 struct ata_port
*ap
=
5673 container_of(work
, struct ata_port
, port_task
.work
);
5674 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5679 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5682 * This is purely heuristic. This is a fast path.
5683 * Sometimes when we enter, BSY will be cleared in
5684 * a chk-status or two. If not, the drive is probably seeking
5685 * or something. Snooze for a couple msecs, then
5686 * chk-status again. If still busy, queue delayed work.
5688 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5689 if (status
& ATA_BUSY
) {
5691 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5692 if (status
& ATA_BUSY
) {
5693 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5699 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5701 /* another command or interrupt handler
5702 * may be running at this point.
5709 * ata_qc_new - Request an available ATA command, for queueing
5710 * @ap: Port associated with device @dev
5711 * @dev: Device from whom we request an available command structure
5717 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5719 struct ata_queued_cmd
*qc
= NULL
;
5722 /* no command while frozen */
5723 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5726 /* the last tag is reserved for internal command. */
5727 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5728 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5729 qc
= __ata_qc_from_tag(ap
, i
);
5740 * ata_qc_new_init - Request an available ATA command, and initialize it
5741 * @dev: Device from whom we request an available command structure
5747 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5749 struct ata_port
*ap
= dev
->link
->ap
;
5750 struct ata_queued_cmd
*qc
;
5752 qc
= ata_qc_new(ap
);
5765 * ata_qc_free - free unused ata_queued_cmd
5766 * @qc: Command to complete
5768 * Designed to free unused ata_queued_cmd object
5769 * in case something prevents using it.
5772 * spin_lock_irqsave(host lock)
5774 void ata_qc_free(struct ata_queued_cmd
*qc
)
5776 struct ata_port
*ap
= qc
->ap
;
5779 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5783 if (likely(ata_tag_valid(tag
))) {
5784 qc
->tag
= ATA_TAG_POISON
;
5785 clear_bit(tag
, &ap
->qc_allocated
);
5789 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5791 struct ata_port
*ap
= qc
->ap
;
5792 struct ata_link
*link
= qc
->dev
->link
;
5794 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5795 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5797 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5800 /* command should be marked inactive atomically with qc completion */
5801 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5802 link
->sactive
&= ~(1 << qc
->tag
);
5804 ap
->nr_active_links
--;
5806 link
->active_tag
= ATA_TAG_POISON
;
5807 ap
->nr_active_links
--;
5810 /* clear exclusive status */
5811 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5812 ap
->excl_link
== link
))
5813 ap
->excl_link
= NULL
;
5815 /* atapi: mark qc as inactive to prevent the interrupt handler
5816 * from completing the command twice later, before the error handler
5817 * is called. (when rc != 0 and atapi request sense is needed)
5819 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5820 ap
->qc_active
&= ~(1 << qc
->tag
);
5822 /* call completion callback */
5823 qc
->complete_fn(qc
);
5826 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5828 struct ata_port
*ap
= qc
->ap
;
5830 qc
->result_tf
.flags
= qc
->tf
.flags
;
5831 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5834 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
5836 struct ata_device
*dev
= qc
->dev
;
5838 if (ata_tag_internal(qc
->tag
))
5841 if (ata_is_nodata(qc
->tf
.protocol
))
5844 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
5847 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
5851 * ata_qc_complete - Complete an active ATA command
5852 * @qc: Command to complete
5853 * @err_mask: ATA Status register contents
5855 * Indicate to the mid and upper layers that an ATA
5856 * command has completed, with either an ok or not-ok status.
5859 * spin_lock_irqsave(host lock)
5861 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5863 struct ata_port
*ap
= qc
->ap
;
5865 /* XXX: New EH and old EH use different mechanisms to
5866 * synchronize EH with regular execution path.
5868 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5869 * Normal execution path is responsible for not accessing a
5870 * failed qc. libata core enforces the rule by returning NULL
5871 * from ata_qc_from_tag() for failed qcs.
5873 * Old EH depends on ata_qc_complete() nullifying completion
5874 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5875 * not synchronize with interrupt handler. Only PIO task is
5878 if (ap
->ops
->error_handler
) {
5879 struct ata_device
*dev
= qc
->dev
;
5880 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5882 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5884 if (unlikely(qc
->err_mask
))
5885 qc
->flags
|= ATA_QCFLAG_FAILED
;
5887 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5888 if (!ata_tag_internal(qc
->tag
)) {
5889 /* always fill result TF for failed qc */
5891 ata_qc_schedule_eh(qc
);
5896 /* read result TF if requested */
5897 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5900 /* Some commands need post-processing after successful
5903 switch (qc
->tf
.command
) {
5904 case ATA_CMD_SET_FEATURES
:
5905 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5906 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5909 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5910 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5911 /* revalidate device */
5912 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5913 ata_port_schedule_eh(ap
);
5917 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5921 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
5922 ata_verify_xfer(qc
);
5924 __ata_qc_complete(qc
);
5926 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5929 /* read result TF if failed or requested */
5930 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5933 __ata_qc_complete(qc
);
5938 * ata_qc_complete_multiple - Complete multiple qcs successfully
5939 * @ap: port in question
5940 * @qc_active: new qc_active mask
5941 * @finish_qc: LLDD callback invoked before completing a qc
5943 * Complete in-flight commands. This functions is meant to be
5944 * called from low-level driver's interrupt routine to complete
5945 * requests normally. ap->qc_active and @qc_active is compared
5946 * and commands are completed accordingly.
5949 * spin_lock_irqsave(host lock)
5952 * Number of completed commands on success, -errno otherwise.
5954 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5955 void (*finish_qc
)(struct ata_queued_cmd
*))
5961 done_mask
= ap
->qc_active
^ qc_active
;
5963 if (unlikely(done_mask
& qc_active
)) {
5964 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5965 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5969 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5970 struct ata_queued_cmd
*qc
;
5972 if (!(done_mask
& (1 << i
)))
5975 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5978 ata_qc_complete(qc
);
5987 * ata_qc_issue - issue taskfile to device
5988 * @qc: command to issue to device
5990 * Prepare an ATA command to submission to device.
5991 * This includes mapping the data into a DMA-able
5992 * area, filling in the S/G table, and finally
5993 * writing the taskfile to hardware, starting the command.
5996 * spin_lock_irqsave(host lock)
5998 void ata_qc_issue(struct ata_queued_cmd
*qc
)
6000 struct ata_port
*ap
= qc
->ap
;
6001 struct ata_link
*link
= qc
->dev
->link
;
6002 u8 prot
= qc
->tf
.protocol
;
6004 /* Make sure only one non-NCQ command is outstanding. The
6005 * check is skipped for old EH because it reuses active qc to
6006 * request ATAPI sense.
6008 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
6010 if (ata_is_ncq(prot
)) {
6011 WARN_ON(link
->sactive
& (1 << qc
->tag
));
6014 ap
->nr_active_links
++;
6015 link
->sactive
|= 1 << qc
->tag
;
6017 WARN_ON(link
->sactive
);
6019 ap
->nr_active_links
++;
6020 link
->active_tag
= qc
->tag
;
6023 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
6024 ap
->qc_active
|= 1 << qc
->tag
;
6026 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
6027 (ap
->flags
& ATA_FLAG_PIO_DMA
))) {
6028 if (qc
->flags
& ATA_QCFLAG_SG
) {
6029 if (ata_sg_setup(qc
))
6031 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
6032 if (ata_sg_setup_one(qc
))
6036 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6039 /* if device is sleeping, schedule softreset and abort the link */
6040 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
6041 link
->eh_info
.action
|= ATA_EH_SOFTRESET
;
6042 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
6043 ata_link_abort(link
);
6047 ap
->ops
->qc_prep(qc
);
6049 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
6050 if (unlikely(qc
->err_mask
))
6055 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6056 qc
->err_mask
|= AC_ERR_SYSTEM
;
6058 ata_qc_complete(qc
);
6062 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6063 * @qc: command to issue to device
6065 * Using various libata functions and hooks, this function
6066 * starts an ATA command. ATA commands are grouped into
6067 * classes called "protocols", and issuing each type of protocol
6068 * is slightly different.
6070 * May be used as the qc_issue() entry in ata_port_operations.
6073 * spin_lock_irqsave(host lock)
6076 * Zero on success, AC_ERR_* mask on failure
6079 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
6081 struct ata_port
*ap
= qc
->ap
;
6083 /* Use polling pio if the LLD doesn't handle
6084 * interrupt driven pio and atapi CDB interrupt.
6086 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
6087 switch (qc
->tf
.protocol
) {
6089 case ATA_PROT_NODATA
:
6090 case ATAPI_PROT_PIO
:
6091 case ATAPI_PROT_NODATA
:
6092 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
6094 case ATAPI_PROT_DMA
:
6095 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
6096 /* see ata_dma_blacklisted() */
6104 /* select the device */
6105 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
6107 /* start the command */
6108 switch (qc
->tf
.protocol
) {
6109 case ATA_PROT_NODATA
:
6110 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6111 ata_qc_set_polling(qc
);
6113 ata_tf_to_host(ap
, &qc
->tf
);
6114 ap
->hsm_task_state
= HSM_ST_LAST
;
6116 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6117 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6122 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6124 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6125 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6126 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
6127 ap
->hsm_task_state
= HSM_ST_LAST
;
6131 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6132 ata_qc_set_polling(qc
);
6134 ata_tf_to_host(ap
, &qc
->tf
);
6136 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
6137 /* PIO data out protocol */
6138 ap
->hsm_task_state
= HSM_ST_FIRST
;
6139 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6141 /* always send first data block using
6142 * the ata_pio_task() codepath.
6145 /* PIO data in protocol */
6146 ap
->hsm_task_state
= HSM_ST
;
6148 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6149 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6151 /* if polling, ata_pio_task() handles the rest.
6152 * otherwise, interrupt handler takes over from here.
6158 case ATAPI_PROT_PIO
:
6159 case ATAPI_PROT_NODATA
:
6160 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6161 ata_qc_set_polling(qc
);
6163 ata_tf_to_host(ap
, &qc
->tf
);
6165 ap
->hsm_task_state
= HSM_ST_FIRST
;
6167 /* send cdb by polling if no cdb interrupt */
6168 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
6169 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
6170 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6173 case ATAPI_PROT_DMA
:
6174 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6176 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6177 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6178 ap
->hsm_task_state
= HSM_ST_FIRST
;
6180 /* send cdb by polling if no cdb interrupt */
6181 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6182 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6187 return AC_ERR_SYSTEM
;
6194 * ata_host_intr - Handle host interrupt for given (port, task)
6195 * @ap: Port on which interrupt arrived (possibly...)
6196 * @qc: Taskfile currently active in engine
6198 * Handle host interrupt for given queued command. Currently,
6199 * only DMA interrupts are handled. All other commands are
6200 * handled via polling with interrupts disabled (nIEN bit).
6203 * spin_lock_irqsave(host lock)
6206 * One if interrupt was handled, zero if not (shared irq).
6209 inline unsigned int ata_host_intr(struct ata_port
*ap
,
6210 struct ata_queued_cmd
*qc
)
6212 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6213 u8 status
, host_stat
= 0;
6215 VPRINTK("ata%u: protocol %d task_state %d\n",
6216 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
6218 /* Check whether we are expecting interrupt in this state */
6219 switch (ap
->hsm_task_state
) {
6221 /* Some pre-ATAPI-4 devices assert INTRQ
6222 * at this state when ready to receive CDB.
6225 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6226 * The flag was turned on only for atapi devices. No
6227 * need to check ata_is_atapi(qc->tf.protocol) again.
6229 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6233 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6234 qc
->tf
.protocol
== ATAPI_PROT_DMA
) {
6235 /* check status of DMA engine */
6236 host_stat
= ap
->ops
->bmdma_status(ap
);
6237 VPRINTK("ata%u: host_stat 0x%X\n",
6238 ap
->print_id
, host_stat
);
6240 /* if it's not our irq... */
6241 if (!(host_stat
& ATA_DMA_INTR
))
6244 /* before we do anything else, clear DMA-Start bit */
6245 ap
->ops
->bmdma_stop(qc
);
6247 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6248 /* error when transfering data to/from memory */
6249 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6250 ap
->hsm_task_state
= HSM_ST_ERR
;
6260 /* check altstatus */
6261 status
= ata_altstatus(ap
);
6262 if (status
& ATA_BUSY
)
6265 /* check main status, clearing INTRQ */
6266 status
= ata_chk_status(ap
);
6267 if (unlikely(status
& ATA_BUSY
))
6270 /* ack bmdma irq events */
6271 ap
->ops
->irq_clear(ap
);
6273 ata_hsm_move(ap
, qc
, status
, 0);
6275 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6276 qc
->tf
.protocol
== ATAPI_PROT_DMA
))
6277 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6279 return 1; /* irq handled */
6282 ap
->stats
.idle_irq
++;
6285 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6287 ap
->ops
->irq_clear(ap
);
6288 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6292 return 0; /* irq not handled */
6296 * ata_interrupt - Default ATA host interrupt handler
6297 * @irq: irq line (unused)
6298 * @dev_instance: pointer to our ata_host information structure
6300 * Default interrupt handler for PCI IDE devices. Calls
6301 * ata_host_intr() for each port that is not disabled.
6304 * Obtains host lock during operation.
6307 * IRQ_NONE or IRQ_HANDLED.
6310 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6312 struct ata_host
*host
= dev_instance
;
6314 unsigned int handled
= 0;
6315 unsigned long flags
;
6317 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6318 spin_lock_irqsave(&host
->lock
, flags
);
6320 for (i
= 0; i
< host
->n_ports
; i
++) {
6321 struct ata_port
*ap
;
6323 ap
= host
->ports
[i
];
6325 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6326 struct ata_queued_cmd
*qc
;
6328 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6329 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6330 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6331 handled
|= ata_host_intr(ap
, qc
);
6335 spin_unlock_irqrestore(&host
->lock
, flags
);
6337 return IRQ_RETVAL(handled
);
6341 * sata_scr_valid - test whether SCRs are accessible
6342 * @link: ATA link to test SCR accessibility for
6344 * Test whether SCRs are accessible for @link.
6350 * 1 if SCRs are accessible, 0 otherwise.
6352 int sata_scr_valid(struct ata_link
*link
)
6354 struct ata_port
*ap
= link
->ap
;
6356 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6360 * sata_scr_read - read SCR register of the specified port
6361 * @link: ATA link to read SCR for
6363 * @val: Place to store read value
6365 * Read SCR register @reg of @link into *@val. This function is
6366 * guaranteed to succeed if @link is ap->link, the cable type of
6367 * the port is SATA and the port implements ->scr_read.
6370 * None if @link is ap->link. Kernel thread context otherwise.
6373 * 0 on success, negative errno on failure.
6375 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6377 if (ata_is_host_link(link
)) {
6378 struct ata_port
*ap
= link
->ap
;
6380 if (sata_scr_valid(link
))
6381 return ap
->ops
->scr_read(ap
, reg
, val
);
6385 return sata_pmp_scr_read(link
, reg
, val
);
6389 * sata_scr_write - write SCR register of the specified port
6390 * @link: ATA link to write SCR for
6391 * @reg: SCR to write
6392 * @val: value to write
6394 * Write @val to SCR register @reg of @link. This function is
6395 * guaranteed to succeed if @link is ap->link, the cable type of
6396 * the port is SATA and the port implements ->scr_read.
6399 * None if @link is ap->link. Kernel thread context otherwise.
6402 * 0 on success, negative errno on failure.
6404 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6406 if (ata_is_host_link(link
)) {
6407 struct ata_port
*ap
= link
->ap
;
6409 if (sata_scr_valid(link
))
6410 return ap
->ops
->scr_write(ap
, reg
, val
);
6414 return sata_pmp_scr_write(link
, reg
, val
);
6418 * sata_scr_write_flush - write SCR register of the specified port and flush
6419 * @link: ATA link to write SCR for
6420 * @reg: SCR to write
6421 * @val: value to write
6423 * This function is identical to sata_scr_write() except that this
6424 * function performs flush after writing to the register.
6427 * None if @link is ap->link. Kernel thread context otherwise.
6430 * 0 on success, negative errno on failure.
6432 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6434 if (ata_is_host_link(link
)) {
6435 struct ata_port
*ap
= link
->ap
;
6438 if (sata_scr_valid(link
)) {
6439 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6441 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6447 return sata_pmp_scr_write(link
, reg
, val
);
6451 * ata_link_online - test whether the given link is online
6452 * @link: ATA link to test
6454 * Test whether @link is online. Note that this function returns
6455 * 0 if online status of @link cannot be obtained, so
6456 * ata_link_online(link) != !ata_link_offline(link).
6462 * 1 if the port online status is available and online.
6464 int ata_link_online(struct ata_link
*link
)
6468 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6469 (sstatus
& 0xf) == 0x3)
6475 * ata_link_offline - test whether the given link is offline
6476 * @link: ATA link to test
6478 * Test whether @link is offline. Note that this function
6479 * returns 0 if offline status of @link cannot be obtained, so
6480 * ata_link_online(link) != !ata_link_offline(link).
6486 * 1 if the port offline status is available and offline.
6488 int ata_link_offline(struct ata_link
*link
)
6492 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6493 (sstatus
& 0xf) != 0x3)
6498 int ata_flush_cache(struct ata_device
*dev
)
6500 unsigned int err_mask
;
6503 if (!ata_try_flush_cache(dev
))
6506 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6507 cmd
= ATA_CMD_FLUSH_EXT
;
6509 cmd
= ATA_CMD_FLUSH
;
6511 /* This is wrong. On a failed flush we get back the LBA of the lost
6512 sector and we should (assuming it wasn't aborted as unknown) issue
6513 a further flush command to continue the writeback until it
6515 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6517 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6525 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6526 unsigned int action
, unsigned int ehi_flags
,
6529 unsigned long flags
;
6532 for (i
= 0; i
< host
->n_ports
; i
++) {
6533 struct ata_port
*ap
= host
->ports
[i
];
6534 struct ata_link
*link
;
6536 /* Previous resume operation might still be in
6537 * progress. Wait for PM_PENDING to clear.
6539 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6540 ata_port_wait_eh(ap
);
6541 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6544 /* request PM ops to EH */
6545 spin_lock_irqsave(ap
->lock
, flags
);
6550 ap
->pm_result
= &rc
;
6553 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6554 __ata_port_for_each_link(link
, ap
) {
6555 link
->eh_info
.action
|= action
;
6556 link
->eh_info
.flags
|= ehi_flags
;
6559 ata_port_schedule_eh(ap
);
6561 spin_unlock_irqrestore(ap
->lock
, flags
);
6563 /* wait and check result */
6565 ata_port_wait_eh(ap
);
6566 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6576 * ata_host_suspend - suspend host
6577 * @host: host to suspend
6580 * Suspend @host. Actual operation is performed by EH. This
6581 * function requests EH to perform PM operations and waits for EH
6585 * Kernel thread context (may sleep).
6588 * 0 on success, -errno on failure.
6590 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6595 * disable link pm on all ports before requesting
6598 ata_lpm_enable(host
);
6600 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6602 host
->dev
->power
.power_state
= mesg
;
6607 * ata_host_resume - resume host
6608 * @host: host to resume
6610 * Resume @host. Actual operation is performed by EH. This
6611 * function requests EH to perform PM operations and returns.
6612 * Note that all resume operations are performed parallely.
6615 * Kernel thread context (may sleep).
6617 void ata_host_resume(struct ata_host
*host
)
6619 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6620 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6621 host
->dev
->power
.power_state
= PMSG_ON
;
6623 /* reenable link pm */
6624 ata_lpm_disable(host
);
6629 * ata_port_start - Set port up for dma.
6630 * @ap: Port to initialize
6632 * Called just after data structures for each port are
6633 * initialized. Allocates space for PRD table.
6635 * May be used as the port_start() entry in ata_port_operations.
6638 * Inherited from caller.
6640 int ata_port_start(struct ata_port
*ap
)
6642 struct device
*dev
= ap
->dev
;
6645 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6650 rc
= ata_pad_alloc(ap
, dev
);
6654 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6655 (unsigned long long)ap
->prd_dma
);
6660 * ata_dev_init - Initialize an ata_device structure
6661 * @dev: Device structure to initialize
6663 * Initialize @dev in preparation for probing.
6666 * Inherited from caller.
6668 void ata_dev_init(struct ata_device
*dev
)
6670 struct ata_link
*link
= dev
->link
;
6671 struct ata_port
*ap
= link
->ap
;
6672 unsigned long flags
;
6674 /* SATA spd limit is bound to the first device */
6675 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6678 /* High bits of dev->flags are used to record warm plug
6679 * requests which occur asynchronously. Synchronize using
6682 spin_lock_irqsave(ap
->lock
, flags
);
6683 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6685 spin_unlock_irqrestore(ap
->lock
, flags
);
6687 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6688 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6689 dev
->pio_mask
= UINT_MAX
;
6690 dev
->mwdma_mask
= UINT_MAX
;
6691 dev
->udma_mask
= UINT_MAX
;
6695 * ata_link_init - Initialize an ata_link structure
6696 * @ap: ATA port link is attached to
6697 * @link: Link structure to initialize
6698 * @pmp: Port multiplier port number
6703 * Kernel thread context (may sleep)
6705 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6709 /* clear everything except for devices */
6710 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6714 link
->active_tag
= ATA_TAG_POISON
;
6715 link
->hw_sata_spd_limit
= UINT_MAX
;
6717 /* can't use iterator, ap isn't initialized yet */
6718 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6719 struct ata_device
*dev
= &link
->device
[i
];
6722 dev
->devno
= dev
- link
->device
;
6728 * sata_link_init_spd - Initialize link->sata_spd_limit
6729 * @link: Link to configure sata_spd_limit for
6731 * Initialize @link->[hw_]sata_spd_limit to the currently
6735 * Kernel thread context (may sleep).
6738 * 0 on success, -errno on failure.
6740 int sata_link_init_spd(struct ata_link
*link
)
6745 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6749 spd
= (scontrol
>> 4) & 0xf;
6751 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6753 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6759 * ata_port_alloc - allocate and initialize basic ATA port resources
6760 * @host: ATA host this allocated port belongs to
6762 * Allocate and initialize basic ATA port resources.
6765 * Allocate ATA port on success, NULL on failure.
6768 * Inherited from calling layer (may sleep).
6770 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6772 struct ata_port
*ap
;
6776 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6780 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6781 ap
->lock
= &host
->lock
;
6782 ap
->flags
= ATA_FLAG_DISABLED
;
6784 ap
->ctl
= ATA_DEVCTL_OBS
;
6786 ap
->dev
= host
->dev
;
6787 ap
->last_ctl
= 0xFF;
6789 #if defined(ATA_VERBOSE_DEBUG)
6790 /* turn on all debugging levels */
6791 ap
->msg_enable
= 0x00FF;
6792 #elif defined(ATA_DEBUG)
6793 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6795 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6798 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6799 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6800 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6801 INIT_LIST_HEAD(&ap
->eh_done_q
);
6802 init_waitqueue_head(&ap
->eh_wait_q
);
6803 init_timer_deferrable(&ap
->fastdrain_timer
);
6804 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6805 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6807 ap
->cbl
= ATA_CBL_NONE
;
6809 ata_link_init(ap
, &ap
->link
, 0);
6812 ap
->stats
.unhandled_irq
= 1;
6813 ap
->stats
.idle_irq
= 1;
6818 static void ata_host_release(struct device
*gendev
, void *res
)
6820 struct ata_host
*host
= dev_get_drvdata(gendev
);
6823 for (i
= 0; i
< host
->n_ports
; i
++) {
6824 struct ata_port
*ap
= host
->ports
[i
];
6830 scsi_host_put(ap
->scsi_host
);
6832 kfree(ap
->pmp_link
);
6834 host
->ports
[i
] = NULL
;
6837 dev_set_drvdata(gendev
, NULL
);
6841 * ata_host_alloc - allocate and init basic ATA host resources
6842 * @dev: generic device this host is associated with
6843 * @max_ports: maximum number of ATA ports associated with this host
6845 * Allocate and initialize basic ATA host resources. LLD calls
6846 * this function to allocate a host, initializes it fully and
6847 * attaches it using ata_host_register().
6849 * @max_ports ports are allocated and host->n_ports is
6850 * initialized to @max_ports. The caller is allowed to decrease
6851 * host->n_ports before calling ata_host_register(). The unused
6852 * ports will be automatically freed on registration.
6855 * Allocate ATA host on success, NULL on failure.
6858 * Inherited from calling layer (may sleep).
6860 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6862 struct ata_host
*host
;
6868 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6871 /* alloc a container for our list of ATA ports (buses) */
6872 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6873 /* alloc a container for our list of ATA ports (buses) */
6874 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6878 devres_add(dev
, host
);
6879 dev_set_drvdata(dev
, host
);
6881 spin_lock_init(&host
->lock
);
6883 host
->n_ports
= max_ports
;
6885 /* allocate ports bound to this host */
6886 for (i
= 0; i
< max_ports
; i
++) {
6887 struct ata_port
*ap
;
6889 ap
= ata_port_alloc(host
);
6894 host
->ports
[i
] = ap
;
6897 devres_remove_group(dev
, NULL
);
6901 devres_release_group(dev
, NULL
);
6906 * ata_host_alloc_pinfo - alloc host and init with port_info array
6907 * @dev: generic device this host is associated with
6908 * @ppi: array of ATA port_info to initialize host with
6909 * @n_ports: number of ATA ports attached to this host
6911 * Allocate ATA host and initialize with info from @ppi. If NULL
6912 * terminated, @ppi may contain fewer entries than @n_ports. The
6913 * last entry will be used for the remaining ports.
6916 * Allocate ATA host on success, NULL on failure.
6919 * Inherited from calling layer (may sleep).
6921 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6922 const struct ata_port_info
* const * ppi
,
6925 const struct ata_port_info
*pi
;
6926 struct ata_host
*host
;
6929 host
= ata_host_alloc(dev
, n_ports
);
6933 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6934 struct ata_port
*ap
= host
->ports
[i
];
6939 ap
->pio_mask
= pi
->pio_mask
;
6940 ap
->mwdma_mask
= pi
->mwdma_mask
;
6941 ap
->udma_mask
= pi
->udma_mask
;
6942 ap
->flags
|= pi
->flags
;
6943 ap
->link
.flags
|= pi
->link_flags
;
6944 ap
->ops
= pi
->port_ops
;
6946 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6947 host
->ops
= pi
->port_ops
;
6948 if (!host
->private_data
&& pi
->private_data
)
6949 host
->private_data
= pi
->private_data
;
6955 static void ata_host_stop(struct device
*gendev
, void *res
)
6957 struct ata_host
*host
= dev_get_drvdata(gendev
);
6960 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
6962 for (i
= 0; i
< host
->n_ports
; i
++) {
6963 struct ata_port
*ap
= host
->ports
[i
];
6965 if (ap
->ops
->port_stop
)
6966 ap
->ops
->port_stop(ap
);
6969 if (host
->ops
->host_stop
)
6970 host
->ops
->host_stop(host
);
6974 * ata_host_start - start and freeze ports of an ATA host
6975 * @host: ATA host to start ports for
6977 * Start and then freeze ports of @host. Started status is
6978 * recorded in host->flags, so this function can be called
6979 * multiple times. Ports are guaranteed to get started only
6980 * once. If host->ops isn't initialized yet, its set to the
6981 * first non-dummy port ops.
6984 * Inherited from calling layer (may sleep).
6987 * 0 if all ports are started successfully, -errno otherwise.
6989 int ata_host_start(struct ata_host
*host
)
6992 void *start_dr
= NULL
;
6995 if (host
->flags
& ATA_HOST_STARTED
)
6998 for (i
= 0; i
< host
->n_ports
; i
++) {
6999 struct ata_port
*ap
= host
->ports
[i
];
7001 if (!host
->ops
&& !ata_port_is_dummy(ap
))
7002 host
->ops
= ap
->ops
;
7004 if (ap
->ops
->port_stop
)
7008 if (host
->ops
->host_stop
)
7012 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
7017 for (i
= 0; i
< host
->n_ports
; i
++) {
7018 struct ata_port
*ap
= host
->ports
[i
];
7020 if (ap
->ops
->port_start
) {
7021 rc
= ap
->ops
->port_start(ap
);
7024 dev_printk(KERN_ERR
, host
->dev
,
7025 "failed to start port %d "
7026 "(errno=%d)\n", i
, rc
);
7030 ata_eh_freeze_port(ap
);
7034 devres_add(host
->dev
, start_dr
);
7035 host
->flags
|= ATA_HOST_STARTED
;
7040 struct ata_port
*ap
= host
->ports
[i
];
7042 if (ap
->ops
->port_stop
)
7043 ap
->ops
->port_stop(ap
);
7045 devres_free(start_dr
);
7050 * ata_sas_host_init - Initialize a host struct
7051 * @host: host to initialize
7052 * @dev: device host is attached to
7053 * @flags: host flags
7057 * PCI/etc. bus probe sem.
7060 /* KILLME - the only user left is ipr */
7061 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
7062 unsigned long flags
, const struct ata_port_operations
*ops
)
7064 spin_lock_init(&host
->lock
);
7066 host
->flags
= flags
;
7071 * ata_host_register - register initialized ATA host
7072 * @host: ATA host to register
7073 * @sht: template for SCSI host
7075 * Register initialized ATA host. @host is allocated using
7076 * ata_host_alloc() and fully initialized by LLD. This function
7077 * starts ports, registers @host with ATA and SCSI layers and
7078 * probe registered devices.
7081 * Inherited from calling layer (may sleep).
7084 * 0 on success, -errno otherwise.
7086 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
7090 /* host must have been started */
7091 if (!(host
->flags
& ATA_HOST_STARTED
)) {
7092 dev_printk(KERN_ERR
, host
->dev
,
7093 "BUG: trying to register unstarted host\n");
7098 /* Blow away unused ports. This happens when LLD can't
7099 * determine the exact number of ports to allocate at
7102 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
7103 kfree(host
->ports
[i
]);
7105 /* give ports names and add SCSI hosts */
7106 for (i
= 0; i
< host
->n_ports
; i
++)
7107 host
->ports
[i
]->print_id
= ata_print_id
++;
7109 rc
= ata_scsi_add_hosts(host
, sht
);
7113 /* associate with ACPI nodes */
7114 ata_acpi_associate(host
);
7116 /* set cable, sata_spd_limit and report */
7117 for (i
= 0; i
< host
->n_ports
; i
++) {
7118 struct ata_port
*ap
= host
->ports
[i
];
7119 unsigned long xfer_mask
;
7121 /* set SATA cable type if still unset */
7122 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
7123 ap
->cbl
= ATA_CBL_SATA
;
7125 /* init sata_spd_limit to the current value */
7126 sata_link_init_spd(&ap
->link
);
7128 /* print per-port info to dmesg */
7129 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
7132 if (!ata_port_is_dummy(ap
)) {
7133 ata_port_printk(ap
, KERN_INFO
,
7134 "%cATA max %s %s\n",
7135 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
7136 ata_mode_string(xfer_mask
),
7137 ap
->link
.eh_info
.desc
);
7138 ata_ehi_clear_desc(&ap
->link
.eh_info
);
7140 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
7143 /* perform each probe synchronously */
7144 DPRINTK("probe begin\n");
7145 for (i
= 0; i
< host
->n_ports
; i
++) {
7146 struct ata_port
*ap
= host
->ports
[i
];
7150 if (ap
->ops
->error_handler
) {
7151 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
7152 unsigned long flags
;
7156 /* kick EH for boot probing */
7157 spin_lock_irqsave(ap
->lock
, flags
);
7160 (1 << ata_link_max_devices(&ap
->link
)) - 1;
7161 ehi
->action
|= ATA_EH_SOFTRESET
;
7162 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
7164 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
7165 ap
->pflags
|= ATA_PFLAG_LOADING
;
7166 ata_port_schedule_eh(ap
);
7168 spin_unlock_irqrestore(ap
->lock
, flags
);
7170 /* wait for EH to finish */
7171 ata_port_wait_eh(ap
);
7173 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
7174 rc
= ata_bus_probe(ap
);
7175 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
7178 /* FIXME: do something useful here?
7179 * Current libata behavior will
7180 * tear down everything when
7181 * the module is removed
7182 * or the h/w is unplugged.
7188 /* probes are done, now scan each port's disk(s) */
7189 DPRINTK("host probe begin\n");
7190 for (i
= 0; i
< host
->n_ports
; i
++) {
7191 struct ata_port
*ap
= host
->ports
[i
];
7193 ata_scsi_scan_host(ap
, 1);
7194 ata_lpm_schedule(ap
, ap
->pm_policy
);
7201 * ata_host_activate - start host, request IRQ and register it
7202 * @host: target ATA host
7203 * @irq: IRQ to request
7204 * @irq_handler: irq_handler used when requesting IRQ
7205 * @irq_flags: irq_flags used when requesting IRQ
7206 * @sht: scsi_host_template to use when registering the host
7208 * After allocating an ATA host and initializing it, most libata
7209 * LLDs perform three steps to activate the host - start host,
7210 * request IRQ and register it. This helper takes necessasry
7211 * arguments and performs the three steps in one go.
7213 * An invalid IRQ skips the IRQ registration and expects the host to
7214 * have set polling mode on the port. In this case, @irq_handler
7218 * Inherited from calling layer (may sleep).
7221 * 0 on success, -errno otherwise.
7223 int ata_host_activate(struct ata_host
*host
, int irq
,
7224 irq_handler_t irq_handler
, unsigned long irq_flags
,
7225 struct scsi_host_template
*sht
)
7229 rc
= ata_host_start(host
);
7233 /* Special case for polling mode */
7235 WARN_ON(irq_handler
);
7236 return ata_host_register(host
, sht
);
7239 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
7240 dev_driver_string(host
->dev
), host
);
7244 for (i
= 0; i
< host
->n_ports
; i
++)
7245 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
7247 rc
= ata_host_register(host
, sht
);
7248 /* if failed, just free the IRQ and leave ports alone */
7250 devm_free_irq(host
->dev
, irq
, host
);
7256 * ata_port_detach - Detach ATA port in prepration of device removal
7257 * @ap: ATA port to be detached
7259 * Detach all ATA devices and the associated SCSI devices of @ap;
7260 * then, remove the associated SCSI host. @ap is guaranteed to
7261 * be quiescent on return from this function.
7264 * Kernel thread context (may sleep).
7266 static void ata_port_detach(struct ata_port
*ap
)
7268 unsigned long flags
;
7269 struct ata_link
*link
;
7270 struct ata_device
*dev
;
7272 if (!ap
->ops
->error_handler
)
7275 /* tell EH we're leaving & flush EH */
7276 spin_lock_irqsave(ap
->lock
, flags
);
7277 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7278 spin_unlock_irqrestore(ap
->lock
, flags
);
7280 ata_port_wait_eh(ap
);
7282 /* EH is now guaranteed to see UNLOADING - EH context belongs
7283 * to us. Disable all existing devices.
7285 ata_port_for_each_link(link
, ap
) {
7286 ata_link_for_each_dev(dev
, link
)
7287 ata_dev_disable(dev
);
7290 /* Final freeze & EH. All in-flight commands are aborted. EH
7291 * will be skipped and retrials will be terminated with bad
7294 spin_lock_irqsave(ap
->lock
, flags
);
7295 ata_port_freeze(ap
); /* won't be thawed */
7296 spin_unlock_irqrestore(ap
->lock
, flags
);
7298 ata_port_wait_eh(ap
);
7299 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7302 /* remove the associated SCSI host */
7303 scsi_remove_host(ap
->scsi_host
);
7307 * ata_host_detach - Detach all ports of an ATA host
7308 * @host: Host to detach
7310 * Detach all ports of @host.
7313 * Kernel thread context (may sleep).
7315 void ata_host_detach(struct ata_host
*host
)
7319 for (i
= 0; i
< host
->n_ports
; i
++)
7320 ata_port_detach(host
->ports
[i
]);
7322 /* the host is dead now, dissociate ACPI */
7323 ata_acpi_dissociate(host
);
7327 * ata_std_ports - initialize ioaddr with standard port offsets.
7328 * @ioaddr: IO address structure to be initialized
7330 * Utility function which initializes data_addr, error_addr,
7331 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7332 * device_addr, status_addr, and command_addr to standard offsets
7333 * relative to cmd_addr.
7335 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7338 void ata_std_ports(struct ata_ioports
*ioaddr
)
7340 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7341 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7342 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7343 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7344 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7345 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7346 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7347 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7348 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7349 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7356 * ata_pci_remove_one - PCI layer callback for device removal
7357 * @pdev: PCI device that was removed
7359 * PCI layer indicates to libata via this hook that hot-unplug or
7360 * module unload event has occurred. Detach all ports. Resource
7361 * release is handled via devres.
7364 * Inherited from PCI layer (may sleep).
7366 void ata_pci_remove_one(struct pci_dev
*pdev
)
7368 struct device
*dev
= &pdev
->dev
;
7369 struct ata_host
*host
= dev_get_drvdata(dev
);
7371 ata_host_detach(host
);
7374 /* move to PCI subsystem */
7375 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7377 unsigned long tmp
= 0;
7379 switch (bits
->width
) {
7382 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7388 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7394 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7405 return (tmp
== bits
->val
) ? 1 : 0;
7409 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7411 pci_save_state(pdev
);
7412 pci_disable_device(pdev
);
7414 if (mesg
.event
== PM_EVENT_SUSPEND
)
7415 pci_set_power_state(pdev
, PCI_D3hot
);
7418 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7422 pci_set_power_state(pdev
, PCI_D0
);
7423 pci_restore_state(pdev
);
7425 rc
= pcim_enable_device(pdev
);
7427 dev_printk(KERN_ERR
, &pdev
->dev
,
7428 "failed to enable device after resume (%d)\n", rc
);
7432 pci_set_master(pdev
);
7436 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7438 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7441 rc
= ata_host_suspend(host
, mesg
);
7445 ata_pci_device_do_suspend(pdev
, mesg
);
7450 int ata_pci_device_resume(struct pci_dev
*pdev
)
7452 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7455 rc
= ata_pci_device_do_resume(pdev
);
7457 ata_host_resume(host
);
7460 #endif /* CONFIG_PM */
7462 #endif /* CONFIG_PCI */
7465 static int __init
ata_init(void)
7467 ata_probe_timeout
*= HZ
;
7468 ata_wq
= create_workqueue("ata");
7472 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7474 destroy_workqueue(ata_wq
);
7478 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7482 static void __exit
ata_exit(void)
7484 destroy_workqueue(ata_wq
);
7485 destroy_workqueue(ata_aux_wq
);
7488 subsys_initcall(ata_init
);
7489 module_exit(ata_exit
);
7491 static unsigned long ratelimit_time
;
7492 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7494 int ata_ratelimit(void)
7497 unsigned long flags
;
7499 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7501 if (time_after(jiffies
, ratelimit_time
)) {
7503 ratelimit_time
= jiffies
+ (HZ
/5);
7507 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7513 * ata_wait_register - wait until register value changes
7514 * @reg: IO-mapped register
7515 * @mask: Mask to apply to read register value
7516 * @val: Wait condition
7517 * @interval_msec: polling interval in milliseconds
7518 * @timeout_msec: timeout in milliseconds
7520 * Waiting for some bits of register to change is a common
7521 * operation for ATA controllers. This function reads 32bit LE
7522 * IO-mapped register @reg and tests for the following condition.
7524 * (*@reg & mask) != val
7526 * If the condition is met, it returns; otherwise, the process is
7527 * repeated after @interval_msec until timeout.
7530 * Kernel thread context (may sleep)
7533 * The final register value.
7535 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7536 unsigned long interval_msec
,
7537 unsigned long timeout_msec
)
7539 unsigned long timeout
;
7542 tmp
= ioread32(reg
);
7544 /* Calculate timeout _after_ the first read to make sure
7545 * preceding writes reach the controller before starting to
7546 * eat away the timeout.
7548 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7550 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7551 msleep(interval_msec
);
7552 tmp
= ioread32(reg
);
7561 static void ata_dummy_noret(struct ata_port
*ap
) { }
7562 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7563 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7565 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7570 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7572 return AC_ERR_SYSTEM
;
7575 const struct ata_port_operations ata_dummy_port_ops
= {
7576 .check_status
= ata_dummy_check_status
,
7577 .check_altstatus
= ata_dummy_check_status
,
7578 .dev_select
= ata_noop_dev_select
,
7579 .qc_prep
= ata_noop_qc_prep
,
7580 .qc_issue
= ata_dummy_qc_issue
,
7581 .freeze
= ata_dummy_noret
,
7582 .thaw
= ata_dummy_noret
,
7583 .error_handler
= ata_dummy_noret
,
7584 .post_internal_cmd
= ata_dummy_qc_noret
,
7585 .irq_clear
= ata_dummy_noret
,
7586 .port_start
= ata_dummy_ret0
,
7587 .port_stop
= ata_dummy_noret
,
7590 const struct ata_port_info ata_dummy_port_info
= {
7591 .port_ops
= &ata_dummy_port_ops
,
7595 * libata is essentially a library of internal helper functions for
7596 * low-level ATA host controller drivers. As such, the API/ABI is
7597 * likely to change as new drivers are added and updated.
7598 * Do not depend on ABI/API stability.
7600 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7601 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7602 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7603 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7604 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7605 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7606 EXPORT_SYMBOL_GPL(ata_std_ports
);
7607 EXPORT_SYMBOL_GPL(ata_host_init
);
7608 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7609 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7610 EXPORT_SYMBOL_GPL(ata_host_start
);
7611 EXPORT_SYMBOL_GPL(ata_host_register
);
7612 EXPORT_SYMBOL_GPL(ata_host_activate
);
7613 EXPORT_SYMBOL_GPL(ata_host_detach
);
7614 EXPORT_SYMBOL_GPL(ata_sg_init
);
7615 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7616 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7617 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7618 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7619 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7620 EXPORT_SYMBOL_GPL(ata_tf_load
);
7621 EXPORT_SYMBOL_GPL(ata_tf_read
);
7622 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7623 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7624 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7625 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7626 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7627 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
7628 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
7629 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
7630 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
7631 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
7632 EXPORT_SYMBOL_GPL(ata_mode_string
);
7633 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
7634 EXPORT_SYMBOL_GPL(ata_check_status
);
7635 EXPORT_SYMBOL_GPL(ata_altstatus
);
7636 EXPORT_SYMBOL_GPL(ata_exec_command
);
7637 EXPORT_SYMBOL_GPL(ata_port_start
);
7638 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7639 EXPORT_SYMBOL_GPL(ata_interrupt
);
7640 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7641 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7642 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7643 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7644 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7645 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7646 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7647 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7648 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7649 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7650 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7651 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7652 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7653 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7654 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7655 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7656 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7657 EXPORT_SYMBOL_GPL(ata_port_probe
);
7658 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7659 EXPORT_SYMBOL_GPL(sata_set_spd
);
7660 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7661 EXPORT_SYMBOL_GPL(sata_link_resume
);
7662 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7663 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7664 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7665 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7666 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7667 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7668 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7669 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7670 EXPORT_SYMBOL_GPL(ata_port_disable
);
7671 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7672 EXPORT_SYMBOL_GPL(ata_wait_register
);
7673 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7674 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7675 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7676 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7677 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7678 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7679 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7680 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7681 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7682 EXPORT_SYMBOL_GPL(ata_host_intr
);
7683 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7684 EXPORT_SYMBOL_GPL(sata_scr_read
);
7685 EXPORT_SYMBOL_GPL(sata_scr_write
);
7686 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7687 EXPORT_SYMBOL_GPL(ata_link_online
);
7688 EXPORT_SYMBOL_GPL(ata_link_offline
);
7690 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7691 EXPORT_SYMBOL_GPL(ata_host_resume
);
7692 #endif /* CONFIG_PM */
7693 EXPORT_SYMBOL_GPL(ata_id_string
);
7694 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7695 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7697 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7698 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
7699 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7700 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7701 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
7704 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7705 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7706 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7707 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7708 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7709 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7711 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7712 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7713 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7714 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7715 #endif /* CONFIG_PM */
7716 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7717 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7718 #endif /* CONFIG_PCI */
7720 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7721 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7722 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7723 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7724 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7726 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7727 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7728 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7729 EXPORT_SYMBOL_GPL(ata_port_desc
);
7731 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7732 #endif /* CONFIG_PCI */
7733 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7734 EXPORT_SYMBOL_GPL(ata_link_abort
);
7735 EXPORT_SYMBOL_GPL(ata_port_abort
);
7736 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7737 EXPORT_SYMBOL_GPL(sata_async_notification
);
7738 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7739 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7740 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7741 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7742 EXPORT_SYMBOL_GPL(ata_do_eh
);
7743 EXPORT_SYMBOL_GPL(ata_irq_on
);
7744 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7746 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7747 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7748 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7749 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
7750 EXPORT_SYMBOL_GPL(ata_cable_sata
);