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 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
458 unsigned int mwdma_mask
,
459 unsigned int 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 static void ata_unpack_xfermask(unsigned int xfer_mask
,
477 unsigned int *pio_mask
,
478 unsigned int *mwdma_mask
,
479 unsigned int *udma_mask
)
482 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
484 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
486 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
489 static const struct ata_xfer_ent
{
493 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
494 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
495 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
500 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
501 * @xfer_mask: xfer_mask of interest
503 * Return matching XFER_* value for @xfer_mask. Only the highest
504 * bit of @xfer_mask is considered.
510 * Matching XFER_* value, 0 if no match found.
512 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
514 int highbit
= fls(xfer_mask
) - 1;
515 const struct ata_xfer_ent
*ent
;
517 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
518 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
519 return ent
->base
+ highbit
- ent
->shift
;
524 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
525 * @xfer_mode: XFER_* of interest
527 * Return matching xfer_mask for @xfer_mode.
533 * Matching xfer_mask, 0 if no match found.
535 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
537 const struct ata_xfer_ent
*ent
;
539 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
540 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
541 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
546 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
547 * @xfer_mode: XFER_* of interest
549 * Return matching xfer_shift for @xfer_mode.
555 * Matching xfer_shift, -1 if no match found.
557 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
559 const struct ata_xfer_ent
*ent
;
561 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
562 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
568 * ata_mode_string - convert xfer_mask to string
569 * @xfer_mask: mask of bits supported; only highest bit counts.
571 * Determine string which represents the highest speed
572 * (highest bit in @modemask).
578 * Constant C string representing highest speed listed in
579 * @mode_mask, or the constant C string "<n/a>".
581 static const char *ata_mode_string(unsigned int xfer_mask
)
583 static const char * const xfer_mode_str
[] = {
607 highbit
= fls(xfer_mask
) - 1;
608 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
609 return xfer_mode_str
[highbit
];
613 static const char *sata_spd_string(unsigned int spd
)
615 static const char * const spd_str
[] = {
620 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
622 return spd_str
[spd
- 1];
625 void ata_dev_disable(struct ata_device
*dev
)
627 if (ata_dev_enabled(dev
)) {
628 if (ata_msg_drv(dev
->link
->ap
))
629 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
630 ata_acpi_on_disable(dev
);
631 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
637 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
639 struct ata_link
*link
= dev
->link
;
640 struct ata_port
*ap
= link
->ap
;
642 unsigned int err_mask
;
646 * disallow DIPM for drivers which haven't set
647 * ATA_FLAG_IPM. This is because when DIPM is enabled,
648 * phy ready will be set in the interrupt status on
649 * state changes, which will cause some drivers to
650 * think there are errors - additionally drivers will
651 * need to disable hot plug.
653 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
654 ap
->pm_policy
= NOT_AVAILABLE
;
659 * For DIPM, we will only enable it for the
662 * Why? Because Disks are too stupid to know that
663 * If the host rejects a request to go to SLUMBER
664 * they should retry at PARTIAL, and instead it
665 * just would give up. So, for medium_power to
666 * work at all, we need to only allow HIPM.
668 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
674 /* no restrictions on IPM transitions */
675 scontrol
&= ~(0x3 << 8);
676 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
681 if (dev
->flags
& ATA_DFLAG_DIPM
)
682 err_mask
= ata_dev_set_feature(dev
,
683 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
686 /* allow IPM to PARTIAL */
687 scontrol
&= ~(0x1 << 8);
688 scontrol
|= (0x2 << 8);
689 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
694 * we don't have to disable DIPM since IPM flags
695 * disallow transitions to SLUMBER, which effectively
696 * disable DIPM if it does not support PARTIAL
700 case MAX_PERFORMANCE
:
701 /* disable all IPM transitions */
702 scontrol
|= (0x3 << 8);
703 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
708 * we don't have to disable DIPM since IPM flags
709 * disallow all transitions which effectively
710 * disable DIPM anyway.
715 /* FIXME: handle SET FEATURES failure */
722 * ata_dev_enable_pm - enable SATA interface power management
723 * @dev: device to enable power management
724 * @policy: the link power management policy
726 * Enable SATA Interface power management. This will enable
727 * Device Interface Power Management (DIPM) for min_power
728 * policy, and then call driver specific callbacks for
729 * enabling Host Initiated Power management.
732 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
734 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
737 struct ata_port
*ap
= dev
->link
->ap
;
739 /* set HIPM first, then DIPM */
740 if (ap
->ops
->enable_pm
)
741 rc
= ap
->ops
->enable_pm(ap
, policy
);
744 rc
= ata_dev_set_dipm(dev
, policy
);
748 ap
->pm_policy
= MAX_PERFORMANCE
;
750 ap
->pm_policy
= policy
;
751 return /* rc */; /* hopefully we can use 'rc' eventually */
756 * ata_dev_disable_pm - disable SATA interface power management
757 * @dev: device to disable power management
759 * Disable SATA Interface power management. This will disable
760 * Device Interface Power Management (DIPM) without changing
761 * policy, call driver specific callbacks for disabling Host
762 * Initiated Power management.
767 static void ata_dev_disable_pm(struct ata_device
*dev
)
769 struct ata_port
*ap
= dev
->link
->ap
;
771 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
772 if (ap
->ops
->disable_pm
)
773 ap
->ops
->disable_pm(ap
);
775 #endif /* CONFIG_PM */
777 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
779 ap
->pm_policy
= policy
;
780 ap
->link
.eh_info
.action
|= ATA_EHI_LPM
;
781 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
782 ata_port_schedule_eh(ap
);
786 static void ata_lpm_enable(struct ata_host
*host
)
788 struct ata_link
*link
;
790 struct ata_device
*dev
;
793 for (i
= 0; i
< host
->n_ports
; i
++) {
795 ata_port_for_each_link(link
, ap
) {
796 ata_link_for_each_dev(dev
, link
)
797 ata_dev_disable_pm(dev
);
802 static void ata_lpm_disable(struct ata_host
*host
)
806 for (i
= 0; i
< host
->n_ports
; i
++) {
807 struct ata_port
*ap
= host
->ports
[i
];
808 ata_lpm_schedule(ap
, ap
->pm_policy
);
811 #endif /* CONFIG_PM */
815 * ata_devchk - PATA device presence detection
816 * @ap: ATA channel to examine
817 * @device: Device to examine (starting at zero)
819 * This technique was originally described in
820 * Hale Landis's ATADRVR (www.ata-atapi.com), and
821 * later found its way into the ATA/ATAPI spec.
823 * Write a pattern to the ATA shadow registers,
824 * and if a device is present, it will respond by
825 * correctly storing and echoing back the
826 * ATA shadow register contents.
832 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
834 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
837 ap
->ops
->dev_select(ap
, device
);
839 iowrite8(0x55, ioaddr
->nsect_addr
);
840 iowrite8(0xaa, ioaddr
->lbal_addr
);
842 iowrite8(0xaa, ioaddr
->nsect_addr
);
843 iowrite8(0x55, ioaddr
->lbal_addr
);
845 iowrite8(0x55, ioaddr
->nsect_addr
);
846 iowrite8(0xaa, ioaddr
->lbal_addr
);
848 nsect
= ioread8(ioaddr
->nsect_addr
);
849 lbal
= ioread8(ioaddr
->lbal_addr
);
851 if ((nsect
== 0x55) && (lbal
== 0xaa))
852 return 1; /* we found a device */
854 return 0; /* nothing found */
858 * ata_dev_classify - determine device type based on ATA-spec signature
859 * @tf: ATA taskfile register set for device to be identified
861 * Determine from taskfile register contents whether a device is
862 * ATA or ATAPI, as per "Signature and persistence" section
863 * of ATA/PI spec (volume 1, sect 5.14).
869 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
870 * %ATA_DEV_UNKNOWN the event of failure.
872 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
874 /* Apple's open source Darwin code hints that some devices only
875 * put a proper signature into the LBA mid/high registers,
876 * So, we only check those. It's sufficient for uniqueness.
878 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
879 * signatures for ATA and ATAPI devices attached on SerialATA,
880 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
881 * spec has never mentioned about using different signatures
882 * for ATA/ATAPI devices. Then, Serial ATA II: Port
883 * Multiplier specification began to use 0x69/0x96 to identify
884 * port multpliers and 0x3c/0xc3 to identify SEMB device.
885 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
886 * 0x69/0x96 shortly and described them as reserved for
889 * We follow the current spec and consider that 0x69/0x96
890 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
892 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
893 DPRINTK("found ATA device by sig\n");
897 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
898 DPRINTK("found ATAPI device by sig\n");
899 return ATA_DEV_ATAPI
;
902 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
903 DPRINTK("found PMP device by sig\n");
907 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
908 printk(KERN_INFO
"ata: SEMB device ignored\n");
909 return ATA_DEV_SEMB_UNSUP
; /* not yet */
912 DPRINTK("unknown device\n");
913 return ATA_DEV_UNKNOWN
;
917 * ata_dev_try_classify - Parse returned ATA device signature
918 * @dev: ATA device to classify (starting at zero)
919 * @present: device seems present
920 * @r_err: Value of error register on completion
922 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
923 * an ATA/ATAPI-defined set of values is placed in the ATA
924 * shadow registers, indicating the results of device detection
927 * Select the ATA device, and read the values from the ATA shadow
928 * registers. Then parse according to the Error register value,
929 * and the spec-defined values examined by ata_dev_classify().
935 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
937 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
940 struct ata_port
*ap
= dev
->link
->ap
;
941 struct ata_taskfile tf
;
945 ap
->ops
->dev_select(ap
, dev
->devno
);
947 memset(&tf
, 0, sizeof(tf
));
949 ap
->ops
->tf_read(ap
, &tf
);
954 /* see if device passed diags: if master then continue and warn later */
955 if (err
== 0 && dev
->devno
== 0)
956 /* diagnostic fail : do nothing _YET_ */
957 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
960 else if ((dev
->devno
== 0) && (err
== 0x81))
965 /* determine if device is ATA or ATAPI */
966 class = ata_dev_classify(&tf
);
968 if (class == ATA_DEV_UNKNOWN
) {
969 /* If the device failed diagnostic, it's likely to
970 * have reported incorrect device signature too.
971 * Assume ATA device if the device seems present but
972 * device signature is invalid with diagnostic
975 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
978 class = ATA_DEV_NONE
;
979 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
980 class = ATA_DEV_NONE
;
986 * ata_id_string - Convert IDENTIFY DEVICE page into string
987 * @id: IDENTIFY DEVICE results we will examine
988 * @s: string into which data is output
989 * @ofs: offset into identify device page
990 * @len: length of string to return. must be an even number.
992 * The strings in the IDENTIFY DEVICE page are broken up into
993 * 16-bit chunks. Run through the string, and output each
994 * 8-bit chunk linearly, regardless of platform.
1000 void ata_id_string(const u16
*id
, unsigned char *s
,
1001 unsigned int ofs
, unsigned int len
)
1020 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1021 * @id: IDENTIFY DEVICE results we will examine
1022 * @s: string into which data is output
1023 * @ofs: offset into identify device page
1024 * @len: length of string to return. must be an odd number.
1026 * This function is identical to ata_id_string except that it
1027 * trims trailing spaces and terminates the resulting string with
1028 * null. @len must be actual maximum length (even number) + 1.
1033 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1034 unsigned int ofs
, unsigned int len
)
1038 WARN_ON(!(len
& 1));
1040 ata_id_string(id
, s
, ofs
, len
- 1);
1042 p
= s
+ strnlen(s
, len
- 1);
1043 while (p
> s
&& p
[-1] == ' ')
1048 static u64
ata_id_n_sectors(const u16
*id
)
1050 if (ata_id_has_lba(id
)) {
1051 if (ata_id_has_lba48(id
))
1052 return ata_id_u64(id
, 100);
1054 return ata_id_u32(id
, 60);
1056 if (ata_id_current_chs_valid(id
))
1057 return ata_id_u32(id
, 57);
1059 return id
[1] * id
[3] * id
[6];
1063 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
1067 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1068 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1069 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1070 sectors
|= (tf
->lbah
& 0xff) << 16;
1071 sectors
|= (tf
->lbam
& 0xff) << 8;
1072 sectors
|= (tf
->lbal
& 0xff);
1077 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
1081 sectors
|= (tf
->device
& 0x0f) << 24;
1082 sectors
|= (tf
->lbah
& 0xff) << 16;
1083 sectors
|= (tf
->lbam
& 0xff) << 8;
1084 sectors
|= (tf
->lbal
& 0xff);
1090 * ata_read_native_max_address - Read native max address
1091 * @dev: target device
1092 * @max_sectors: out parameter for the result native max address
1094 * Perform an LBA48 or LBA28 native size query upon the device in
1098 * 0 on success, -EACCES if command is aborted by the drive.
1099 * -EIO on other errors.
1101 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1103 unsigned int err_mask
;
1104 struct ata_taskfile tf
;
1105 int lba48
= ata_id_has_lba48(dev
->id
);
1107 ata_tf_init(dev
, &tf
);
1109 /* always clear all address registers */
1110 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1113 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1114 tf
.flags
|= ATA_TFLAG_LBA48
;
1116 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1118 tf
.protocol
|= ATA_PROT_NODATA
;
1119 tf
.device
|= ATA_LBA
;
1121 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1123 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1124 "max address (err_mask=0x%x)\n", err_mask
);
1125 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1131 *max_sectors
= ata_tf_to_lba48(&tf
);
1133 *max_sectors
= ata_tf_to_lba(&tf
);
1134 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1140 * ata_set_max_sectors - Set max sectors
1141 * @dev: target device
1142 * @new_sectors: new max sectors value to set for the device
1144 * Set max sectors of @dev to @new_sectors.
1147 * 0 on success, -EACCES if command is aborted or denied (due to
1148 * previous non-volatile SET_MAX) by the drive. -EIO on other
1151 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1153 unsigned int err_mask
;
1154 struct ata_taskfile tf
;
1155 int lba48
= ata_id_has_lba48(dev
->id
);
1159 ata_tf_init(dev
, &tf
);
1161 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1164 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1165 tf
.flags
|= ATA_TFLAG_LBA48
;
1167 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1168 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1169 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1171 tf
.command
= ATA_CMD_SET_MAX
;
1173 tf
.device
|= (new_sectors
>> 24) & 0xf;
1176 tf
.protocol
|= ATA_PROT_NODATA
;
1177 tf
.device
|= ATA_LBA
;
1179 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1180 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1181 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1183 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1185 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1186 "max address (err_mask=0x%x)\n", err_mask
);
1187 if (err_mask
== AC_ERR_DEV
&&
1188 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1197 * ata_hpa_resize - Resize a device with an HPA set
1198 * @dev: Device to resize
1200 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1201 * it if required to the full size of the media. The caller must check
1202 * the drive has the HPA feature set enabled.
1205 * 0 on success, -errno on failure.
1207 static int ata_hpa_resize(struct ata_device
*dev
)
1209 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1210 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1211 u64 sectors
= ata_id_n_sectors(dev
->id
);
1215 /* do we need to do it? */
1216 if (dev
->class != ATA_DEV_ATA
||
1217 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1218 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1221 /* read native max address */
1222 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1224 /* If HPA isn't going to be unlocked, skip HPA
1225 * resizing from the next try.
1227 if (!ata_ignore_hpa
) {
1228 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1229 "broken, will skip HPA handling\n");
1230 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1232 /* we can continue if device aborted the command */
1240 /* nothing to do? */
1241 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1242 if (!print_info
|| native_sectors
== sectors
)
1245 if (native_sectors
> sectors
)
1246 ata_dev_printk(dev
, KERN_INFO
,
1247 "HPA detected: current %llu, native %llu\n",
1248 (unsigned long long)sectors
,
1249 (unsigned long long)native_sectors
);
1250 else if (native_sectors
< sectors
)
1251 ata_dev_printk(dev
, KERN_WARNING
,
1252 "native sectors (%llu) is smaller than "
1254 (unsigned long long)native_sectors
,
1255 (unsigned long long)sectors
);
1259 /* let's unlock HPA */
1260 rc
= ata_set_max_sectors(dev
, native_sectors
);
1261 if (rc
== -EACCES
) {
1262 /* if device aborted the command, skip HPA resizing */
1263 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1264 "(%llu -> %llu), skipping HPA handling\n",
1265 (unsigned long long)sectors
,
1266 (unsigned long long)native_sectors
);
1267 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1272 /* re-read IDENTIFY data */
1273 rc
= ata_dev_reread_id(dev
, 0);
1275 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1276 "data after HPA resizing\n");
1281 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1282 ata_dev_printk(dev
, KERN_INFO
,
1283 "HPA unlocked: %llu -> %llu, native %llu\n",
1284 (unsigned long long)sectors
,
1285 (unsigned long long)new_sectors
,
1286 (unsigned long long)native_sectors
);
1293 * ata_id_to_dma_mode - Identify DMA mode from id block
1294 * @dev: device to identify
1295 * @unknown: mode to assume if we cannot tell
1297 * Set up the timing values for the device based upon the identify
1298 * reported values for the DMA mode. This function is used by drivers
1299 * which rely upon firmware configured modes, but wish to report the
1300 * mode correctly when possible.
1302 * In addition we emit similarly formatted messages to the default
1303 * ata_dev_set_mode handler, in order to provide consistency of
1307 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1312 /* Pack the DMA modes */
1313 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1314 if (dev
->id
[53] & 0x04)
1315 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1317 /* Select the mode in use */
1318 mode
= ata_xfer_mask2mode(mask
);
1321 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1322 ata_mode_string(mask
));
1324 /* SWDMA perhaps ? */
1326 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1329 /* Configure the device reporting */
1330 dev
->xfer_mode
= mode
;
1331 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1335 * ata_noop_dev_select - Select device 0/1 on ATA bus
1336 * @ap: ATA channel to manipulate
1337 * @device: ATA device (numbered from zero) to select
1339 * This function performs no actual function.
1341 * May be used as the dev_select() entry in ata_port_operations.
1346 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1352 * ata_std_dev_select - Select device 0/1 on ATA bus
1353 * @ap: ATA channel to manipulate
1354 * @device: ATA device (numbered from zero) to select
1356 * Use the method defined in the ATA specification to
1357 * make either device 0, or device 1, active on the
1358 * ATA channel. Works with both PIO and MMIO.
1360 * May be used as the dev_select() entry in ata_port_operations.
1366 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1371 tmp
= ATA_DEVICE_OBS
;
1373 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1375 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1376 ata_pause(ap
); /* needed; also flushes, for mmio */
1380 * ata_dev_select - Select device 0/1 on ATA bus
1381 * @ap: ATA channel to manipulate
1382 * @device: ATA device (numbered from zero) to select
1383 * @wait: non-zero to wait for Status register BSY bit to clear
1384 * @can_sleep: non-zero if context allows sleeping
1386 * Use the method defined in the ATA specification to
1387 * make either device 0, or device 1, active on the
1390 * This is a high-level version of ata_std_dev_select(),
1391 * which additionally provides the services of inserting
1392 * the proper pauses and status polling, where needed.
1398 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1399 unsigned int wait
, unsigned int can_sleep
)
1401 if (ata_msg_probe(ap
))
1402 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1403 "device %u, wait %u\n", device
, wait
);
1408 ap
->ops
->dev_select(ap
, device
);
1411 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1418 * ata_dump_id - IDENTIFY DEVICE info debugging output
1419 * @id: IDENTIFY DEVICE page to dump
1421 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1428 static inline void ata_dump_id(const u16
*id
)
1430 DPRINTK("49==0x%04x "
1440 DPRINTK("80==0x%04x "
1450 DPRINTK("88==0x%04x "
1457 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1458 * @id: IDENTIFY data to compute xfer mask from
1460 * Compute the xfermask for this device. This is not as trivial
1461 * as it seems if we must consider early devices correctly.
1463 * FIXME: pre IDE drive timing (do we care ?).
1471 static unsigned int ata_id_xfermask(const u16
*id
)
1473 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1475 /* Usual case. Word 53 indicates word 64 is valid */
1476 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1477 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1481 /* If word 64 isn't valid then Word 51 high byte holds
1482 * the PIO timing number for the maximum. Turn it into
1485 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1486 if (mode
< 5) /* Valid PIO range */
1487 pio_mask
= (2 << mode
) - 1;
1491 /* But wait.. there's more. Design your standards by
1492 * committee and you too can get a free iordy field to
1493 * process. However its the speeds not the modes that
1494 * are supported... Note drivers using the timing API
1495 * will get this right anyway
1499 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1501 if (ata_id_is_cfa(id
)) {
1503 * Process compact flash extended modes
1505 int pio
= id
[163] & 0x7;
1506 int dma
= (id
[163] >> 3) & 7;
1509 pio_mask
|= (1 << 5);
1511 pio_mask
|= (1 << 6);
1513 mwdma_mask
|= (1 << 3);
1515 mwdma_mask
|= (1 << 4);
1519 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1520 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1522 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1526 * ata_port_queue_task - Queue port_task
1527 * @ap: The ata_port to queue port_task for
1528 * @fn: workqueue function to be scheduled
1529 * @data: data for @fn to use
1530 * @delay: delay time for workqueue function
1532 * Schedule @fn(@data) for execution after @delay jiffies using
1533 * port_task. There is one port_task per port and it's the
1534 * user(low level driver)'s responsibility to make sure that only
1535 * one task is active at any given time.
1537 * libata core layer takes care of synchronization between
1538 * port_task and EH. ata_port_queue_task() may be ignored for EH
1542 * Inherited from caller.
1544 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1545 unsigned long delay
)
1547 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1548 ap
->port_task_data
= data
;
1550 /* may fail if ata_port_flush_task() in progress */
1551 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1555 * ata_port_flush_task - Flush port_task
1556 * @ap: The ata_port to flush port_task for
1558 * After this function completes, port_task is guranteed not to
1559 * be running or scheduled.
1562 * Kernel thread context (may sleep)
1564 void ata_port_flush_task(struct ata_port
*ap
)
1568 cancel_rearming_delayed_work(&ap
->port_task
);
1570 if (ata_msg_ctl(ap
))
1571 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1574 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1576 struct completion
*waiting
= qc
->private_data
;
1582 * ata_exec_internal_sg - execute libata internal command
1583 * @dev: Device to which the command is sent
1584 * @tf: Taskfile registers for the command and the result
1585 * @cdb: CDB for packet command
1586 * @dma_dir: Data tranfer direction of the command
1587 * @sgl: sg list for the data buffer of the command
1588 * @n_elem: Number of sg entries
1589 * @timeout: Timeout in msecs (0 for default)
1591 * Executes libata internal command with timeout. @tf contains
1592 * command on entry and result on return. Timeout and error
1593 * conditions are reported via return value. No recovery action
1594 * is taken after a command times out. It's caller's duty to
1595 * clean up after timeout.
1598 * None. Should be called with kernel context, might sleep.
1601 * Zero on success, AC_ERR_* mask on failure
1603 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1604 struct ata_taskfile
*tf
, const u8
*cdb
,
1605 int dma_dir
, struct scatterlist
*sgl
,
1606 unsigned int n_elem
, unsigned long timeout
)
1608 struct ata_link
*link
= dev
->link
;
1609 struct ata_port
*ap
= link
->ap
;
1610 u8 command
= tf
->command
;
1611 struct ata_queued_cmd
*qc
;
1612 unsigned int tag
, preempted_tag
;
1613 u32 preempted_sactive
, preempted_qc_active
;
1614 int preempted_nr_active_links
;
1615 DECLARE_COMPLETION_ONSTACK(wait
);
1616 unsigned long flags
;
1617 unsigned int err_mask
;
1620 spin_lock_irqsave(ap
->lock
, flags
);
1622 /* no internal command while frozen */
1623 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1624 spin_unlock_irqrestore(ap
->lock
, flags
);
1625 return AC_ERR_SYSTEM
;
1628 /* initialize internal qc */
1630 /* XXX: Tag 0 is used for drivers with legacy EH as some
1631 * drivers choke if any other tag is given. This breaks
1632 * ata_tag_internal() test for those drivers. Don't use new
1633 * EH stuff without converting to it.
1635 if (ap
->ops
->error_handler
)
1636 tag
= ATA_TAG_INTERNAL
;
1640 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1642 qc
= __ata_qc_from_tag(ap
, tag
);
1650 preempted_tag
= link
->active_tag
;
1651 preempted_sactive
= link
->sactive
;
1652 preempted_qc_active
= ap
->qc_active
;
1653 preempted_nr_active_links
= ap
->nr_active_links
;
1654 link
->active_tag
= ATA_TAG_POISON
;
1657 ap
->nr_active_links
= 0;
1659 /* prepare & issue qc */
1662 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1663 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1664 qc
->dma_dir
= dma_dir
;
1665 if (dma_dir
!= DMA_NONE
) {
1666 unsigned int i
, buflen
= 0;
1667 struct scatterlist
*sg
;
1669 for_each_sg(sgl
, sg
, n_elem
, i
)
1670 buflen
+= sg
->length
;
1672 ata_sg_init(qc
, sgl
, n_elem
);
1673 qc
->nbytes
= buflen
;
1676 qc
->private_data
= &wait
;
1677 qc
->complete_fn
= ata_qc_complete_internal
;
1681 spin_unlock_irqrestore(ap
->lock
, flags
);
1684 timeout
= ata_probe_timeout
* 1000 / HZ
;
1686 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1688 ata_port_flush_task(ap
);
1691 spin_lock_irqsave(ap
->lock
, flags
);
1693 /* We're racing with irq here. If we lose, the
1694 * following test prevents us from completing the qc
1695 * twice. If we win, the port is frozen and will be
1696 * cleaned up by ->post_internal_cmd().
1698 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1699 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1701 if (ap
->ops
->error_handler
)
1702 ata_port_freeze(ap
);
1704 ata_qc_complete(qc
);
1706 if (ata_msg_warn(ap
))
1707 ata_dev_printk(dev
, KERN_WARNING
,
1708 "qc timeout (cmd 0x%x)\n", command
);
1711 spin_unlock_irqrestore(ap
->lock
, flags
);
1714 /* do post_internal_cmd */
1715 if (ap
->ops
->post_internal_cmd
)
1716 ap
->ops
->post_internal_cmd(qc
);
1718 /* perform minimal error analysis */
1719 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1720 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1721 qc
->err_mask
|= AC_ERR_DEV
;
1724 qc
->err_mask
|= AC_ERR_OTHER
;
1726 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1727 qc
->err_mask
&= ~AC_ERR_OTHER
;
1731 spin_lock_irqsave(ap
->lock
, flags
);
1733 *tf
= qc
->result_tf
;
1734 err_mask
= qc
->err_mask
;
1737 link
->active_tag
= preempted_tag
;
1738 link
->sactive
= preempted_sactive
;
1739 ap
->qc_active
= preempted_qc_active
;
1740 ap
->nr_active_links
= preempted_nr_active_links
;
1742 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1743 * Until those drivers are fixed, we detect the condition
1744 * here, fail the command with AC_ERR_SYSTEM and reenable the
1747 * Note that this doesn't change any behavior as internal
1748 * command failure results in disabling the device in the
1749 * higher layer for LLDDs without new reset/EH callbacks.
1751 * Kill the following code as soon as those drivers are fixed.
1753 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1754 err_mask
|= AC_ERR_SYSTEM
;
1758 spin_unlock_irqrestore(ap
->lock
, flags
);
1764 * ata_exec_internal - execute libata internal command
1765 * @dev: Device to which the command is sent
1766 * @tf: Taskfile registers for the command and the result
1767 * @cdb: CDB for packet command
1768 * @dma_dir: Data tranfer direction of the command
1769 * @buf: Data buffer of the command
1770 * @buflen: Length of data buffer
1771 * @timeout: Timeout in msecs (0 for default)
1773 * Wrapper around ata_exec_internal_sg() which takes simple
1774 * buffer instead of sg list.
1777 * None. Should be called with kernel context, might sleep.
1780 * Zero on success, AC_ERR_* mask on failure
1782 unsigned ata_exec_internal(struct ata_device
*dev
,
1783 struct ata_taskfile
*tf
, const u8
*cdb
,
1784 int dma_dir
, void *buf
, unsigned int buflen
,
1785 unsigned long timeout
)
1787 struct scatterlist
*psg
= NULL
, sg
;
1788 unsigned int n_elem
= 0;
1790 if (dma_dir
!= DMA_NONE
) {
1792 sg_init_one(&sg
, buf
, buflen
);
1797 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1802 * ata_do_simple_cmd - execute simple internal command
1803 * @dev: Device to which the command is sent
1804 * @cmd: Opcode to execute
1806 * Execute a 'simple' command, that only consists of the opcode
1807 * 'cmd' itself, without filling any other registers
1810 * Kernel thread context (may sleep).
1813 * Zero on success, AC_ERR_* mask on failure
1815 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1817 struct ata_taskfile tf
;
1819 ata_tf_init(dev
, &tf
);
1822 tf
.flags
|= ATA_TFLAG_DEVICE
;
1823 tf
.protocol
= ATA_PROT_NODATA
;
1825 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1829 * ata_pio_need_iordy - check if iordy needed
1832 * Check if the current speed of the device requires IORDY. Used
1833 * by various controllers for chip configuration.
1836 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1838 /* Controller doesn't support IORDY. Probably a pointless check
1839 as the caller should know this */
1840 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1842 /* PIO3 and higher it is mandatory */
1843 if (adev
->pio_mode
> XFER_PIO_2
)
1845 /* We turn it on when possible */
1846 if (ata_id_has_iordy(adev
->id
))
1852 * ata_pio_mask_no_iordy - Return the non IORDY mask
1855 * Compute the highest mode possible if we are not using iordy. Return
1856 * -1 if no iordy mode is available.
1859 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1861 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1862 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1863 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1864 /* Is the speed faster than the drive allows non IORDY ? */
1866 /* This is cycle times not frequency - watch the logic! */
1867 if (pio
> 240) /* PIO2 is 240nS per cycle */
1868 return 3 << ATA_SHIFT_PIO
;
1869 return 7 << ATA_SHIFT_PIO
;
1872 return 3 << ATA_SHIFT_PIO
;
1876 * ata_dev_read_id - Read ID data from the specified device
1877 * @dev: target device
1878 * @p_class: pointer to class of the target device (may be changed)
1879 * @flags: ATA_READID_* flags
1880 * @id: buffer to read IDENTIFY data into
1882 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1883 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1884 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1885 * for pre-ATA4 drives.
1887 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1888 * now we abort if we hit that case.
1891 * Kernel thread context (may sleep)
1894 * 0 on success, -errno otherwise.
1896 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1897 unsigned int flags
, u16
*id
)
1899 struct ata_port
*ap
= dev
->link
->ap
;
1900 unsigned int class = *p_class
;
1901 struct ata_taskfile tf
;
1902 unsigned int err_mask
= 0;
1904 int may_fallback
= 1, tried_spinup
= 0;
1907 if (ata_msg_ctl(ap
))
1908 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1910 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1912 ata_tf_init(dev
, &tf
);
1916 tf
.command
= ATA_CMD_ID_ATA
;
1919 tf
.command
= ATA_CMD_ID_ATAPI
;
1923 reason
= "unsupported class";
1927 tf
.protocol
= ATA_PROT_PIO
;
1929 /* Some devices choke if TF registers contain garbage. Make
1930 * sure those are properly initialized.
1932 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1934 /* Device presence detection is unreliable on some
1935 * controllers. Always poll IDENTIFY if available.
1937 tf
.flags
|= ATA_TFLAG_POLLING
;
1939 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1940 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1942 if (err_mask
& AC_ERR_NODEV_HINT
) {
1943 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1944 ap
->print_id
, dev
->devno
);
1948 /* Device or controller might have reported the wrong
1949 * device class. Give a shot at the other IDENTIFY if
1950 * the current one is aborted by the device.
1953 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1956 if (class == ATA_DEV_ATA
)
1957 class = ATA_DEV_ATAPI
;
1959 class = ATA_DEV_ATA
;
1964 reason
= "I/O error";
1968 /* Falling back doesn't make sense if ID data was read
1969 * successfully at least once.
1973 swap_buf_le16(id
, ATA_ID_WORDS
);
1977 reason
= "device reports invalid type";
1979 if (class == ATA_DEV_ATA
) {
1980 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1983 if (ata_id_is_ata(id
))
1987 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1990 * Drive powered-up in standby mode, and requires a specific
1991 * SET_FEATURES spin-up subcommand before it will accept
1992 * anything other than the original IDENTIFY command.
1994 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1995 if (err_mask
&& id
[2] != 0x738c) {
1997 reason
= "SPINUP failed";
2001 * If the drive initially returned incomplete IDENTIFY info,
2002 * we now must reissue the IDENTIFY command.
2004 if (id
[2] == 0x37c8)
2008 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2010 * The exact sequence expected by certain pre-ATA4 drives is:
2012 * IDENTIFY (optional in early ATA)
2013 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2015 * Some drives were very specific about that exact sequence.
2017 * Note that ATA4 says lba is mandatory so the second check
2018 * shoud never trigger.
2020 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2021 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2024 reason
= "INIT_DEV_PARAMS failed";
2028 /* current CHS translation info (id[53-58]) might be
2029 * changed. reread the identify device info.
2031 flags
&= ~ATA_READID_POSTRESET
;
2041 if (ata_msg_warn(ap
))
2042 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2043 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2047 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2049 struct ata_port
*ap
= dev
->link
->ap
;
2050 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2053 static void ata_dev_config_ncq(struct ata_device
*dev
,
2054 char *desc
, size_t desc_sz
)
2056 struct ata_port
*ap
= dev
->link
->ap
;
2057 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2059 if (!ata_id_has_ncq(dev
->id
)) {
2063 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2064 snprintf(desc
, desc_sz
, "NCQ (not used)");
2067 if (ap
->flags
& ATA_FLAG_NCQ
) {
2068 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2069 dev
->flags
|= ATA_DFLAG_NCQ
;
2072 if (hdepth
>= ddepth
)
2073 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2075 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2079 * ata_dev_configure - Configure the specified ATA/ATAPI device
2080 * @dev: Target device to configure
2082 * Configure @dev according to @dev->id. Generic and low-level
2083 * driver specific fixups are also applied.
2086 * Kernel thread context (may sleep)
2089 * 0 on success, -errno otherwise
2091 int ata_dev_configure(struct ata_device
*dev
)
2093 struct ata_port
*ap
= dev
->link
->ap
;
2094 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2095 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2096 const u16
*id
= dev
->id
;
2097 unsigned int xfer_mask
;
2098 char revbuf
[7]; /* XYZ-99\0 */
2099 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2100 char modelbuf
[ATA_ID_PROD_LEN
+1];
2103 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2104 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2109 if (ata_msg_probe(ap
))
2110 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
2113 dev
->horkage
|= ata_dev_blacklisted(dev
);
2115 /* let ACPI work its magic */
2116 rc
= ata_acpi_on_devcfg(dev
);
2120 /* massage HPA, do it early as it might change IDENTIFY data */
2121 rc
= ata_hpa_resize(dev
);
2125 /* print device capabilities */
2126 if (ata_msg_probe(ap
))
2127 ata_dev_printk(dev
, KERN_DEBUG
,
2128 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2129 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2131 id
[49], id
[82], id
[83], id
[84],
2132 id
[85], id
[86], id
[87], id
[88]);
2134 /* initialize to-be-configured parameters */
2135 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2136 dev
->max_sectors
= 0;
2144 * common ATA, ATAPI feature tests
2147 /* find max transfer mode; for printk only */
2148 xfer_mask
= ata_id_xfermask(id
);
2150 if (ata_msg_probe(ap
))
2153 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2154 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2157 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2160 /* ATA-specific feature tests */
2161 if (dev
->class == ATA_DEV_ATA
) {
2162 if (ata_id_is_cfa(id
)) {
2163 if (id
[162] & 1) /* CPRM may make this media unusable */
2164 ata_dev_printk(dev
, KERN_WARNING
,
2165 "supports DRM functions and may "
2166 "not be fully accessable.\n");
2167 snprintf(revbuf
, 7, "CFA");
2169 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2170 /* Warn the user if the device has TPM extensions */
2171 if (ata_id_has_tpm(id
))
2172 ata_dev_printk(dev
, KERN_WARNING
,
2173 "supports DRM functions and may "
2174 "not be fully accessable.\n");
2177 dev
->n_sectors
= ata_id_n_sectors(id
);
2179 if (dev
->id
[59] & 0x100)
2180 dev
->multi_count
= dev
->id
[59] & 0xff;
2182 if (ata_id_has_lba(id
)) {
2183 const char *lba_desc
;
2187 dev
->flags
|= ATA_DFLAG_LBA
;
2188 if (ata_id_has_lba48(id
)) {
2189 dev
->flags
|= ATA_DFLAG_LBA48
;
2192 if (dev
->n_sectors
>= (1UL << 28) &&
2193 ata_id_has_flush_ext(id
))
2194 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2198 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2200 /* print device info to dmesg */
2201 if (ata_msg_drv(ap
) && print_info
) {
2202 ata_dev_printk(dev
, KERN_INFO
,
2203 "%s: %s, %s, max %s\n",
2204 revbuf
, modelbuf
, fwrevbuf
,
2205 ata_mode_string(xfer_mask
));
2206 ata_dev_printk(dev
, KERN_INFO
,
2207 "%Lu sectors, multi %u: %s %s\n",
2208 (unsigned long long)dev
->n_sectors
,
2209 dev
->multi_count
, lba_desc
, ncq_desc
);
2214 /* Default translation */
2215 dev
->cylinders
= id
[1];
2217 dev
->sectors
= id
[6];
2219 if (ata_id_current_chs_valid(id
)) {
2220 /* Current CHS translation is valid. */
2221 dev
->cylinders
= id
[54];
2222 dev
->heads
= id
[55];
2223 dev
->sectors
= id
[56];
2226 /* print device info to dmesg */
2227 if (ata_msg_drv(ap
) && print_info
) {
2228 ata_dev_printk(dev
, KERN_INFO
,
2229 "%s: %s, %s, max %s\n",
2230 revbuf
, modelbuf
, fwrevbuf
,
2231 ata_mode_string(xfer_mask
));
2232 ata_dev_printk(dev
, KERN_INFO
,
2233 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2234 (unsigned long long)dev
->n_sectors
,
2235 dev
->multi_count
, dev
->cylinders
,
2236 dev
->heads
, dev
->sectors
);
2243 /* ATAPI-specific feature tests */
2244 else if (dev
->class == ATA_DEV_ATAPI
) {
2245 const char *cdb_intr_string
= "";
2246 const char *atapi_an_string
= "";
2249 rc
= atapi_cdb_len(id
);
2250 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2251 if (ata_msg_warn(ap
))
2252 ata_dev_printk(dev
, KERN_WARNING
,
2253 "unsupported CDB len\n");
2257 dev
->cdb_len
= (unsigned int) rc
;
2259 /* Enable ATAPI AN if both the host and device have
2260 * the support. If PMP is attached, SNTF is required
2261 * to enable ATAPI AN to discern between PHY status
2262 * changed notifications and ATAPI ANs.
2264 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2265 (!ap
->nr_pmp_links
||
2266 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2267 unsigned int err_mask
;
2269 /* issue SET feature command to turn this on */
2270 err_mask
= ata_dev_set_feature(dev
,
2271 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2273 ata_dev_printk(dev
, KERN_ERR
,
2274 "failed to enable ATAPI AN "
2275 "(err_mask=0x%x)\n", err_mask
);
2277 dev
->flags
|= ATA_DFLAG_AN
;
2278 atapi_an_string
= ", ATAPI AN";
2282 if (ata_id_cdb_intr(dev
->id
)) {
2283 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2284 cdb_intr_string
= ", CDB intr";
2287 /* print device info to dmesg */
2288 if (ata_msg_drv(ap
) && print_info
)
2289 ata_dev_printk(dev
, KERN_INFO
,
2290 "ATAPI: %s, %s, max %s%s%s\n",
2292 ata_mode_string(xfer_mask
),
2293 cdb_intr_string
, atapi_an_string
);
2296 /* determine max_sectors */
2297 dev
->max_sectors
= ATA_MAX_SECTORS
;
2298 if (dev
->flags
& ATA_DFLAG_LBA48
)
2299 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2301 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2302 if (ata_id_has_hipm(dev
->id
))
2303 dev
->flags
|= ATA_DFLAG_HIPM
;
2304 if (ata_id_has_dipm(dev
->id
))
2305 dev
->flags
|= ATA_DFLAG_DIPM
;
2308 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2309 /* Let the user know. We don't want to disallow opens for
2310 rescue purposes, or in case the vendor is just a blithering
2313 ata_dev_printk(dev
, KERN_WARNING
,
2314 "Drive reports diagnostics failure. This may indicate a drive\n");
2315 ata_dev_printk(dev
, KERN_WARNING
,
2316 "fault or invalid emulation. Contact drive vendor for information.\n");
2320 /* limit bridge transfers to udma5, 200 sectors */
2321 if (ata_dev_knobble(dev
)) {
2322 if (ata_msg_drv(ap
) && print_info
)
2323 ata_dev_printk(dev
, KERN_INFO
,
2324 "applying bridge limits\n");
2325 dev
->udma_mask
&= ATA_UDMA5
;
2326 dev
->max_sectors
= ATA_MAX_SECTORS
;
2329 if ((dev
->class == ATA_DEV_ATAPI
) &&
2330 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2331 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2332 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2335 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2336 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2339 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2340 dev
->horkage
|= ATA_HORKAGE_IPM
;
2342 /* reset link pm_policy for this port to no pm */
2343 ap
->pm_policy
= MAX_PERFORMANCE
;
2346 if (ap
->ops
->dev_config
)
2347 ap
->ops
->dev_config(dev
);
2349 if (ata_msg_probe(ap
))
2350 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2351 __FUNCTION__
, ata_chk_status(ap
));
2355 if (ata_msg_probe(ap
))
2356 ata_dev_printk(dev
, KERN_DEBUG
,
2357 "%s: EXIT, err\n", __FUNCTION__
);
2362 * ata_cable_40wire - return 40 wire cable type
2365 * Helper method for drivers which want to hardwire 40 wire cable
2369 int ata_cable_40wire(struct ata_port
*ap
)
2371 return ATA_CBL_PATA40
;
2375 * ata_cable_80wire - return 80 wire cable type
2378 * Helper method for drivers which want to hardwire 80 wire cable
2382 int ata_cable_80wire(struct ata_port
*ap
)
2384 return ATA_CBL_PATA80
;
2388 * ata_cable_unknown - return unknown PATA cable.
2391 * Helper method for drivers which have no PATA cable detection.
2394 int ata_cable_unknown(struct ata_port
*ap
)
2396 return ATA_CBL_PATA_UNK
;
2400 * ata_cable_sata - return SATA cable type
2403 * Helper method for drivers which have SATA cables
2406 int ata_cable_sata(struct ata_port
*ap
)
2408 return ATA_CBL_SATA
;
2412 * ata_bus_probe - Reset and probe ATA bus
2415 * Master ATA bus probing function. Initiates a hardware-dependent
2416 * bus reset, then attempts to identify any devices found on
2420 * PCI/etc. bus probe sem.
2423 * Zero on success, negative errno otherwise.
2426 int ata_bus_probe(struct ata_port
*ap
)
2428 unsigned int classes
[ATA_MAX_DEVICES
];
2429 int tries
[ATA_MAX_DEVICES
];
2431 struct ata_device
*dev
;
2435 ata_link_for_each_dev(dev
, &ap
->link
)
2436 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2439 ata_link_for_each_dev(dev
, &ap
->link
) {
2440 /* If we issue an SRST then an ATA drive (not ATAPI)
2441 * may change configuration and be in PIO0 timing. If
2442 * we do a hard reset (or are coming from power on)
2443 * this is true for ATA or ATAPI. Until we've set a
2444 * suitable controller mode we should not touch the
2445 * bus as we may be talking too fast.
2447 dev
->pio_mode
= XFER_PIO_0
;
2449 /* If the controller has a pio mode setup function
2450 * then use it to set the chipset to rights. Don't
2451 * touch the DMA setup as that will be dealt with when
2452 * configuring devices.
2454 if (ap
->ops
->set_piomode
)
2455 ap
->ops
->set_piomode(ap
, dev
);
2458 /* reset and determine device classes */
2459 ap
->ops
->phy_reset(ap
);
2461 ata_link_for_each_dev(dev
, &ap
->link
) {
2462 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2463 dev
->class != ATA_DEV_UNKNOWN
)
2464 classes
[dev
->devno
] = dev
->class;
2466 classes
[dev
->devno
] = ATA_DEV_NONE
;
2468 dev
->class = ATA_DEV_UNKNOWN
;
2473 /* read IDENTIFY page and configure devices. We have to do the identify
2474 specific sequence bass-ackwards so that PDIAG- is released by
2477 ata_link_for_each_dev(dev
, &ap
->link
) {
2478 if (tries
[dev
->devno
])
2479 dev
->class = classes
[dev
->devno
];
2481 if (!ata_dev_enabled(dev
))
2484 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2490 /* Now ask for the cable type as PDIAG- should have been released */
2491 if (ap
->ops
->cable_detect
)
2492 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2494 /* We may have SATA bridge glue hiding here irrespective of the
2495 reported cable types and sensed types */
2496 ata_link_for_each_dev(dev
, &ap
->link
) {
2497 if (!ata_dev_enabled(dev
))
2499 /* SATA drives indicate we have a bridge. We don't know which
2500 end of the link the bridge is which is a problem */
2501 if (ata_id_is_sata(dev
->id
))
2502 ap
->cbl
= ATA_CBL_SATA
;
2505 /* After the identify sequence we can now set up the devices. We do
2506 this in the normal order so that the user doesn't get confused */
2508 ata_link_for_each_dev(dev
, &ap
->link
) {
2509 if (!ata_dev_enabled(dev
))
2512 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2513 rc
= ata_dev_configure(dev
);
2514 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2519 /* configure transfer mode */
2520 rc
= ata_set_mode(&ap
->link
, &dev
);
2524 ata_link_for_each_dev(dev
, &ap
->link
)
2525 if (ata_dev_enabled(dev
))
2528 /* no device present, disable port */
2529 ata_port_disable(ap
);
2533 tries
[dev
->devno
]--;
2537 /* eeek, something went very wrong, give up */
2538 tries
[dev
->devno
] = 0;
2542 /* give it just one more chance */
2543 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2545 if (tries
[dev
->devno
] == 1) {
2546 /* This is the last chance, better to slow
2547 * down than lose it.
2549 sata_down_spd_limit(&ap
->link
);
2550 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2554 if (!tries
[dev
->devno
])
2555 ata_dev_disable(dev
);
2561 * ata_port_probe - Mark port as enabled
2562 * @ap: Port for which we indicate enablement
2564 * Modify @ap data structure such that the system
2565 * thinks that the entire port is enabled.
2567 * LOCKING: host lock, or some other form of
2571 void ata_port_probe(struct ata_port
*ap
)
2573 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2577 * sata_print_link_status - Print SATA link status
2578 * @link: SATA link to printk link status about
2580 * This function prints link speed and status of a SATA link.
2585 void sata_print_link_status(struct ata_link
*link
)
2587 u32 sstatus
, scontrol
, tmp
;
2589 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2591 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2593 if (ata_link_online(link
)) {
2594 tmp
= (sstatus
>> 4) & 0xf;
2595 ata_link_printk(link
, KERN_INFO
,
2596 "SATA link up %s (SStatus %X SControl %X)\n",
2597 sata_spd_string(tmp
), sstatus
, scontrol
);
2599 ata_link_printk(link
, KERN_INFO
,
2600 "SATA link down (SStatus %X SControl %X)\n",
2606 * ata_dev_pair - return other device on cable
2609 * Obtain the other device on the same cable, or if none is
2610 * present NULL is returned
2613 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2615 struct ata_link
*link
= adev
->link
;
2616 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2617 if (!ata_dev_enabled(pair
))
2623 * ata_port_disable - Disable port.
2624 * @ap: Port to be disabled.
2626 * Modify @ap data structure such that the system
2627 * thinks that the entire port is disabled, and should
2628 * never attempt to probe or communicate with devices
2631 * LOCKING: host lock, or some other form of
2635 void ata_port_disable(struct ata_port
*ap
)
2637 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2638 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2639 ap
->flags
|= ATA_FLAG_DISABLED
;
2643 * sata_down_spd_limit - adjust SATA spd limit downward
2644 * @link: Link to adjust SATA spd limit for
2646 * Adjust SATA spd limit of @link downward. Note that this
2647 * function only adjusts the limit. The change must be applied
2648 * using sata_set_spd().
2651 * Inherited from caller.
2654 * 0 on success, negative errno on failure
2656 int sata_down_spd_limit(struct ata_link
*link
)
2658 u32 sstatus
, spd
, mask
;
2661 if (!sata_scr_valid(link
))
2664 /* If SCR can be read, use it to determine the current SPD.
2665 * If not, use cached value in link->sata_spd.
2667 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2669 spd
= (sstatus
>> 4) & 0xf;
2671 spd
= link
->sata_spd
;
2673 mask
= link
->sata_spd_limit
;
2677 /* unconditionally mask off the highest bit */
2678 highbit
= fls(mask
) - 1;
2679 mask
&= ~(1 << highbit
);
2681 /* Mask off all speeds higher than or equal to the current
2682 * one. Force 1.5Gbps if current SPD is not available.
2685 mask
&= (1 << (spd
- 1)) - 1;
2689 /* were we already at the bottom? */
2693 link
->sata_spd_limit
= mask
;
2695 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2696 sata_spd_string(fls(mask
)));
2701 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2703 struct ata_link
*host_link
= &link
->ap
->link
;
2704 u32 limit
, target
, spd
;
2706 limit
= link
->sata_spd_limit
;
2708 /* Don't configure downstream link faster than upstream link.
2709 * It doesn't speed up anything and some PMPs choke on such
2712 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2713 limit
&= (1 << host_link
->sata_spd
) - 1;
2715 if (limit
== UINT_MAX
)
2718 target
= fls(limit
);
2720 spd
= (*scontrol
>> 4) & 0xf;
2721 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2723 return spd
!= target
;
2727 * sata_set_spd_needed - is SATA spd configuration needed
2728 * @link: Link in question
2730 * Test whether the spd limit in SControl matches
2731 * @link->sata_spd_limit. This function is used to determine
2732 * whether hardreset is necessary to apply SATA spd
2736 * Inherited from caller.
2739 * 1 if SATA spd configuration is needed, 0 otherwise.
2741 int sata_set_spd_needed(struct ata_link
*link
)
2745 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2748 return __sata_set_spd_needed(link
, &scontrol
);
2752 * sata_set_spd - set SATA spd according to spd limit
2753 * @link: Link to set SATA spd for
2755 * Set SATA spd of @link according to sata_spd_limit.
2758 * Inherited from caller.
2761 * 0 if spd doesn't need to be changed, 1 if spd has been
2762 * changed. Negative errno if SCR registers are inaccessible.
2764 int sata_set_spd(struct ata_link
*link
)
2769 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2772 if (!__sata_set_spd_needed(link
, &scontrol
))
2775 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2782 * This mode timing computation functionality is ported over from
2783 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2786 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2787 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2788 * for UDMA6, which is currently supported only by Maxtor drives.
2790 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2793 static const struct ata_timing ata_timing
[] = {
2795 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2796 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2797 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2798 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2800 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2801 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2802 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2803 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2804 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2806 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2808 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2809 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2810 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2812 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2813 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2814 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2816 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2817 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2818 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2819 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2821 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2822 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2823 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2825 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2830 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2831 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2833 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2835 q
->setup
= EZ(t
->setup
* 1000, T
);
2836 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2837 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2838 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2839 q
->active
= EZ(t
->active
* 1000, T
);
2840 q
->recover
= EZ(t
->recover
* 1000, T
);
2841 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2842 q
->udma
= EZ(t
->udma
* 1000, UT
);
2845 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2846 struct ata_timing
*m
, unsigned int what
)
2848 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2849 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2850 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2851 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2852 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2853 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2854 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2855 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2858 static const struct ata_timing
*ata_timing_find_mode(unsigned short speed
)
2860 const struct ata_timing
*t
;
2862 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2863 if (t
->mode
== 0xFF)
2868 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2869 struct ata_timing
*t
, int T
, int UT
)
2871 const struct ata_timing
*s
;
2872 struct ata_timing p
;
2878 if (!(s
= ata_timing_find_mode(speed
)))
2881 memcpy(t
, s
, sizeof(*s
));
2884 * If the drive is an EIDE drive, it can tell us it needs extended
2885 * PIO/MW_DMA cycle timing.
2888 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2889 memset(&p
, 0, sizeof(p
));
2890 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2891 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2892 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2893 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2894 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2896 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2900 * Convert the timing to bus clock counts.
2903 ata_timing_quantize(t
, t
, T
, UT
);
2906 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2907 * S.M.A.R.T * and some other commands. We have to ensure that the
2908 * DMA cycle timing is slower/equal than the fastest PIO timing.
2911 if (speed
> XFER_PIO_6
) {
2912 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2913 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2917 * Lengthen active & recovery time so that cycle time is correct.
2920 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2921 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2922 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2925 if (t
->active
+ t
->recover
< t
->cycle
) {
2926 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2927 t
->recover
= t
->cycle
- t
->active
;
2930 /* In a few cases quantisation may produce enough errors to
2931 leave t->cycle too low for the sum of active and recovery
2932 if so we must correct this */
2933 if (t
->active
+ t
->recover
> t
->cycle
)
2934 t
->cycle
= t
->active
+ t
->recover
;
2940 * ata_down_xfermask_limit - adjust dev xfer masks downward
2941 * @dev: Device to adjust xfer masks
2942 * @sel: ATA_DNXFER_* selector
2944 * Adjust xfer masks of @dev downward. Note that this function
2945 * does not apply the change. Invoking ata_set_mode() afterwards
2946 * will apply the limit.
2949 * Inherited from caller.
2952 * 0 on success, negative errno on failure
2954 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2957 unsigned int orig_mask
, xfer_mask
;
2958 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2961 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2962 sel
&= ~ATA_DNXFER_QUIET
;
2964 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
2967 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
2970 case ATA_DNXFER_PIO
:
2971 highbit
= fls(pio_mask
) - 1;
2972 pio_mask
&= ~(1 << highbit
);
2975 case ATA_DNXFER_DMA
:
2977 highbit
= fls(udma_mask
) - 1;
2978 udma_mask
&= ~(1 << highbit
);
2981 } else if (mwdma_mask
) {
2982 highbit
= fls(mwdma_mask
) - 1;
2983 mwdma_mask
&= ~(1 << highbit
);
2989 case ATA_DNXFER_40C
:
2990 udma_mask
&= ATA_UDMA_MASK_40C
;
2993 case ATA_DNXFER_FORCE_PIO0
:
2995 case ATA_DNXFER_FORCE_PIO
:
3004 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3006 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3010 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3011 snprintf(buf
, sizeof(buf
), "%s:%s",
3012 ata_mode_string(xfer_mask
),
3013 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3015 snprintf(buf
, sizeof(buf
), "%s",
3016 ata_mode_string(xfer_mask
));
3018 ata_dev_printk(dev
, KERN_WARNING
,
3019 "limiting speed to %s\n", buf
);
3022 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3028 static int ata_dev_set_mode(struct ata_device
*dev
)
3030 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3031 unsigned int err_mask
;
3034 dev
->flags
&= ~ATA_DFLAG_PIO
;
3035 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3036 dev
->flags
|= ATA_DFLAG_PIO
;
3038 err_mask
= ata_dev_set_xfermode(dev
);
3040 /* Old CFA may refuse this command, which is just fine */
3041 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3042 err_mask
&= ~AC_ERR_DEV
;
3044 /* Some very old devices and some bad newer ones fail any kind of
3045 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3046 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3047 dev
->pio_mode
<= XFER_PIO_2
)
3048 err_mask
&= ~AC_ERR_DEV
;
3050 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3051 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3052 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3053 dev
->dma_mode
== XFER_MW_DMA_0
&&
3054 (dev
->id
[63] >> 8) & 1)
3055 err_mask
&= ~AC_ERR_DEV
;
3058 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3059 "(err_mask=0x%x)\n", err_mask
);
3063 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3064 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3065 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3069 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3070 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3072 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
3073 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
3078 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3079 * @link: link on which timings will be programmed
3080 * @r_failed_dev: out paramter for failed device
3082 * Standard implementation of the function used to tune and set
3083 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3084 * ata_dev_set_mode() fails, pointer to the failing device is
3085 * returned in @r_failed_dev.
3088 * PCI/etc. bus probe sem.
3091 * 0 on success, negative errno otherwise
3094 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3096 struct ata_port
*ap
= link
->ap
;
3097 struct ata_device
*dev
;
3098 int rc
= 0, used_dma
= 0, found
= 0;
3100 /* step 1: calculate xfer_mask */
3101 ata_link_for_each_dev(dev
, link
) {
3102 unsigned int pio_mask
, dma_mask
;
3103 unsigned int mode_mask
;
3105 if (!ata_dev_enabled(dev
))
3108 mode_mask
= ATA_DMA_MASK_ATA
;
3109 if (dev
->class == ATA_DEV_ATAPI
)
3110 mode_mask
= ATA_DMA_MASK_ATAPI
;
3111 else if (ata_id_is_cfa(dev
->id
))
3112 mode_mask
= ATA_DMA_MASK_CFA
;
3114 ata_dev_xfermask(dev
);
3116 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3117 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3119 if (libata_dma_mask
& mode_mask
)
3120 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3124 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3125 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3134 /* step 2: always set host PIO timings */
3135 ata_link_for_each_dev(dev
, link
) {
3136 if (!ata_dev_enabled(dev
))
3139 if (!dev
->pio_mode
) {
3140 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3145 dev
->xfer_mode
= dev
->pio_mode
;
3146 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3147 if (ap
->ops
->set_piomode
)
3148 ap
->ops
->set_piomode(ap
, dev
);
3151 /* step 3: set host DMA timings */
3152 ata_link_for_each_dev(dev
, link
) {
3153 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
3156 dev
->xfer_mode
= dev
->dma_mode
;
3157 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3158 if (ap
->ops
->set_dmamode
)
3159 ap
->ops
->set_dmamode(ap
, dev
);
3162 /* step 4: update devices' xfer mode */
3163 ata_link_for_each_dev(dev
, link
) {
3164 /* don't update suspended devices' xfer mode */
3165 if (!ata_dev_enabled(dev
))
3168 rc
= ata_dev_set_mode(dev
);
3173 /* Record simplex status. If we selected DMA then the other
3174 * host channels are not permitted to do so.
3176 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3177 ap
->host
->simplex_claimed
= ap
;
3181 *r_failed_dev
= dev
;
3186 * ata_tf_to_host - issue ATA taskfile to host controller
3187 * @ap: port to which command is being issued
3188 * @tf: ATA taskfile register set
3190 * Issues ATA taskfile register set to ATA host controller,
3191 * with proper synchronization with interrupt handler and
3195 * spin_lock_irqsave(host lock)
3198 static inline void ata_tf_to_host(struct ata_port
*ap
,
3199 const struct ata_taskfile
*tf
)
3201 ap
->ops
->tf_load(ap
, tf
);
3202 ap
->ops
->exec_command(ap
, tf
);
3206 * ata_busy_sleep - sleep until BSY clears, or timeout
3207 * @ap: port containing status register to be polled
3208 * @tmout_pat: impatience timeout
3209 * @tmout: overall timeout
3211 * Sleep until ATA Status register bit BSY clears,
3212 * or a timeout occurs.
3215 * Kernel thread context (may sleep).
3218 * 0 on success, -errno otherwise.
3220 int ata_busy_sleep(struct ata_port
*ap
,
3221 unsigned long tmout_pat
, unsigned long tmout
)
3223 unsigned long timer_start
, timeout
;
3226 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3227 timer_start
= jiffies
;
3228 timeout
= timer_start
+ tmout_pat
;
3229 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3230 time_before(jiffies
, timeout
)) {
3232 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3235 if (status
!= 0xff && (status
& ATA_BUSY
))
3236 ata_port_printk(ap
, KERN_WARNING
,
3237 "port is slow to respond, please be patient "
3238 "(Status 0x%x)\n", status
);
3240 timeout
= timer_start
+ tmout
;
3241 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3242 time_before(jiffies
, timeout
)) {
3244 status
= ata_chk_status(ap
);
3250 if (status
& ATA_BUSY
) {
3251 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3252 "(%lu secs, Status 0x%x)\n",
3253 tmout
/ HZ
, status
);
3261 * ata_wait_after_reset - wait before checking status after reset
3262 * @ap: port containing status register to be polled
3263 * @deadline: deadline jiffies for the operation
3265 * After reset, we need to pause a while before reading status.
3266 * Also, certain combination of controller and device report 0xff
3267 * for some duration (e.g. until SATA PHY is up and running)
3268 * which is interpreted as empty port in ATA world. This
3269 * function also waits for such devices to get out of 0xff
3273 * Kernel thread context (may sleep).
3275 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3277 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3279 if (time_before(until
, deadline
))
3282 /* Spec mandates ">= 2ms" before checking status. We wait
3283 * 150ms, because that was the magic delay used for ATAPI
3284 * devices in Hale Landis's ATADRVR, for the period of time
3285 * between when the ATA command register is written, and then
3286 * status is checked. Because waiting for "a while" before
3287 * checking status is fine, post SRST, we perform this magic
3288 * delay here as well.
3290 * Old drivers/ide uses the 2mS rule and then waits for ready.
3294 /* Wait for 0xff to clear. Some SATA devices take a long time
3295 * to clear 0xff after reset. For example, HHD424020F7SV00
3296 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3299 * Note that some PATA controllers (pata_ali) explode if
3300 * status register is read more than once when there's no
3303 if (ap
->flags
& ATA_FLAG_SATA
) {
3305 u8 status
= ata_chk_status(ap
);
3307 if (status
!= 0xff || time_after(jiffies
, deadline
))
3316 * ata_wait_ready - sleep until BSY clears, or timeout
3317 * @ap: port containing status register to be polled
3318 * @deadline: deadline jiffies for the operation
3320 * Sleep until ATA Status register bit BSY clears, or timeout
3324 * Kernel thread context (may sleep).
3327 * 0 on success, -errno otherwise.
3329 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3331 unsigned long start
= jiffies
;
3335 u8 status
= ata_chk_status(ap
);
3336 unsigned long now
= jiffies
;
3338 if (!(status
& ATA_BUSY
))
3340 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3342 if (time_after(now
, deadline
))
3345 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3346 (deadline
- now
> 3 * HZ
)) {
3347 ata_port_printk(ap
, KERN_WARNING
,
3348 "port is slow to respond, please be patient "
3349 "(Status 0x%x)\n", status
);
3357 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3358 unsigned long deadline
)
3360 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3361 unsigned int dev0
= devmask
& (1 << 0);
3362 unsigned int dev1
= devmask
& (1 << 1);
3365 /* if device 0 was found in ata_devchk, wait for its
3369 rc
= ata_wait_ready(ap
, deadline
);
3377 /* if device 1 was found in ata_devchk, wait for register
3378 * access briefly, then wait for BSY to clear.
3383 ap
->ops
->dev_select(ap
, 1);
3385 /* Wait for register access. Some ATAPI devices fail
3386 * to set nsect/lbal after reset, so don't waste too
3387 * much time on it. We're gonna wait for !BSY anyway.
3389 for (i
= 0; i
< 2; i
++) {
3392 nsect
= ioread8(ioaddr
->nsect_addr
);
3393 lbal
= ioread8(ioaddr
->lbal_addr
);
3394 if ((nsect
== 1) && (lbal
== 1))
3396 msleep(50); /* give drive a breather */
3399 rc
= ata_wait_ready(ap
, deadline
);
3407 /* is all this really necessary? */
3408 ap
->ops
->dev_select(ap
, 0);
3410 ap
->ops
->dev_select(ap
, 1);
3412 ap
->ops
->dev_select(ap
, 0);
3417 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3418 unsigned long deadline
)
3420 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3422 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3424 /* software reset. causes dev0 to be selected */
3425 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3426 udelay(20); /* FIXME: flush */
3427 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3428 udelay(20); /* FIXME: flush */
3429 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3431 /* wait a while before checking status */
3432 ata_wait_after_reset(ap
, deadline
);
3434 /* Before we perform post reset processing we want to see if
3435 * the bus shows 0xFF because the odd clown forgets the D7
3436 * pulldown resistor.
3438 if (ata_chk_status(ap
) == 0xFF)
3441 return ata_bus_post_reset(ap
, devmask
, deadline
);
3445 * ata_bus_reset - reset host port and associated ATA channel
3446 * @ap: port to reset
3448 * This is typically the first time we actually start issuing
3449 * commands to the ATA channel. We wait for BSY to clear, then
3450 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3451 * result. Determine what devices, if any, are on the channel
3452 * by looking at the device 0/1 error register. Look at the signature
3453 * stored in each device's taskfile registers, to determine if
3454 * the device is ATA or ATAPI.
3457 * PCI/etc. bus probe sem.
3458 * Obtains host lock.
3461 * Sets ATA_FLAG_DISABLED if bus reset fails.
3464 void ata_bus_reset(struct ata_port
*ap
)
3466 struct ata_device
*device
= ap
->link
.device
;
3467 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3468 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3470 unsigned int dev0
, dev1
= 0, devmask
= 0;
3473 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3475 /* determine if device 0/1 are present */
3476 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3479 dev0
= ata_devchk(ap
, 0);
3481 dev1
= ata_devchk(ap
, 1);
3485 devmask
|= (1 << 0);
3487 devmask
|= (1 << 1);
3489 /* select device 0 again */
3490 ap
->ops
->dev_select(ap
, 0);
3492 /* issue bus reset */
3493 if (ap
->flags
& ATA_FLAG_SRST
) {
3494 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3495 if (rc
&& rc
!= -ENODEV
)
3500 * determine by signature whether we have ATA or ATAPI devices
3502 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3503 if ((slave_possible
) && (err
!= 0x81))
3504 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3506 /* is double-select really necessary? */
3507 if (device
[1].class != ATA_DEV_NONE
)
3508 ap
->ops
->dev_select(ap
, 1);
3509 if (device
[0].class != ATA_DEV_NONE
)
3510 ap
->ops
->dev_select(ap
, 0);
3512 /* if no devices were detected, disable this port */
3513 if ((device
[0].class == ATA_DEV_NONE
) &&
3514 (device
[1].class == ATA_DEV_NONE
))
3517 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3518 /* set up device control for ATA_FLAG_SATA_RESET */
3519 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3526 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3527 ata_port_disable(ap
);
3533 * sata_link_debounce - debounce SATA phy status
3534 * @link: ATA link to debounce SATA phy status for
3535 * @params: timing parameters { interval, duratinon, timeout } in msec
3536 * @deadline: deadline jiffies for the operation
3538 * Make sure SStatus of @link reaches stable state, determined by
3539 * holding the same value where DET is not 1 for @duration polled
3540 * every @interval, before @timeout. Timeout constraints the
3541 * beginning of the stable state. Because DET gets stuck at 1 on
3542 * some controllers after hot unplugging, this functions waits
3543 * until timeout then returns 0 if DET is stable at 1.
3545 * @timeout is further limited by @deadline. The sooner of the
3549 * Kernel thread context (may sleep)
3552 * 0 on success, -errno on failure.
3554 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3555 unsigned long deadline
)
3557 unsigned long interval_msec
= params
[0];
3558 unsigned long duration
= msecs_to_jiffies(params
[1]);
3559 unsigned long last_jiffies
, t
;
3563 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3564 if (time_before(t
, deadline
))
3567 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3572 last_jiffies
= jiffies
;
3575 msleep(interval_msec
);
3576 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3582 if (cur
== 1 && time_before(jiffies
, deadline
))
3584 if (time_after(jiffies
, last_jiffies
+ duration
))
3589 /* unstable, start over */
3591 last_jiffies
= jiffies
;
3593 /* Check deadline. If debouncing failed, return
3594 * -EPIPE to tell upper layer to lower link speed.
3596 if (time_after(jiffies
, deadline
))
3602 * sata_link_resume - resume SATA link
3603 * @link: ATA link to resume SATA
3604 * @params: timing parameters { interval, duratinon, timeout } in msec
3605 * @deadline: deadline jiffies for the operation
3607 * Resume SATA phy @link and debounce it.
3610 * Kernel thread context (may sleep)
3613 * 0 on success, -errno on failure.
3615 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3616 unsigned long deadline
)
3621 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3624 scontrol
= (scontrol
& 0x0f0) | 0x300;
3626 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3629 /* Some PHYs react badly if SStatus is pounded immediately
3630 * after resuming. Delay 200ms before debouncing.
3634 return sata_link_debounce(link
, params
, deadline
);
3638 * ata_std_prereset - prepare for reset
3639 * @link: ATA link to be reset
3640 * @deadline: deadline jiffies for the operation
3642 * @link is about to be reset. Initialize it. Failure from
3643 * prereset makes libata abort whole reset sequence and give up
3644 * that port, so prereset should be best-effort. It does its
3645 * best to prepare for reset sequence but if things go wrong, it
3646 * should just whine, not fail.
3649 * Kernel thread context (may sleep)
3652 * 0 on success, -errno otherwise.
3654 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3656 struct ata_port
*ap
= link
->ap
;
3657 struct ata_eh_context
*ehc
= &link
->eh_context
;
3658 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3661 /* handle link resume */
3662 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3663 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3664 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3666 /* Some PMPs don't work with only SRST, force hardreset if PMP
3669 if (ap
->flags
& ATA_FLAG_PMP
)
3670 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3672 /* if we're about to do hardreset, nothing more to do */
3673 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3676 /* if SATA, resume link */
3677 if (ap
->flags
& ATA_FLAG_SATA
) {
3678 rc
= sata_link_resume(link
, timing
, deadline
);
3679 /* whine about phy resume failure but proceed */
3680 if (rc
&& rc
!= -EOPNOTSUPP
)
3681 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3682 "link for reset (errno=%d)\n", rc
);
3685 /* Wait for !BSY if the controller can wait for the first D2H
3686 * Reg FIS and we don't know that no device is attached.
3688 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3689 rc
= ata_wait_ready(ap
, deadline
);
3690 if (rc
&& rc
!= -ENODEV
) {
3691 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3692 "(errno=%d), forcing hardreset\n", rc
);
3693 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3701 * ata_std_softreset - reset host port via ATA SRST
3702 * @link: ATA link to reset
3703 * @classes: resulting classes of attached devices
3704 * @deadline: deadline jiffies for the operation
3706 * Reset host port using ATA SRST.
3709 * Kernel thread context (may sleep)
3712 * 0 on success, -errno otherwise.
3714 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3715 unsigned long deadline
)
3717 struct ata_port
*ap
= link
->ap
;
3718 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3719 unsigned int devmask
= 0;
3725 if (ata_link_offline(link
)) {
3726 classes
[0] = ATA_DEV_NONE
;
3730 /* determine if device 0/1 are present */
3731 if (ata_devchk(ap
, 0))
3732 devmask
|= (1 << 0);
3733 if (slave_possible
&& ata_devchk(ap
, 1))
3734 devmask
|= (1 << 1);
3736 /* select device 0 again */
3737 ap
->ops
->dev_select(ap
, 0);
3739 /* issue bus reset */
3740 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3741 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3742 /* if link is occupied, -ENODEV too is an error */
3743 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3744 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3748 /* determine by signature whether we have ATA or ATAPI devices */
3749 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3750 devmask
& (1 << 0), &err
);
3751 if (slave_possible
&& err
!= 0x81)
3752 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3753 devmask
& (1 << 1), &err
);
3756 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3761 * sata_link_hardreset - reset link via SATA phy reset
3762 * @link: link to reset
3763 * @timing: timing parameters { interval, duratinon, timeout } in msec
3764 * @deadline: deadline jiffies for the operation
3766 * SATA phy-reset @link using DET bits of SControl register.
3769 * Kernel thread context (may sleep)
3772 * 0 on success, -errno otherwise.
3774 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3775 unsigned long deadline
)
3782 if (sata_set_spd_needed(link
)) {
3783 /* SATA spec says nothing about how to reconfigure
3784 * spd. To be on the safe side, turn off phy during
3785 * reconfiguration. This works for at least ICH7 AHCI
3788 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3791 scontrol
= (scontrol
& 0x0f0) | 0x304;
3793 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3799 /* issue phy wake/reset */
3800 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3803 scontrol
= (scontrol
& 0x0f0) | 0x301;
3805 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3808 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3809 * 10.4.2 says at least 1 ms.
3813 /* bring link back */
3814 rc
= sata_link_resume(link
, timing
, deadline
);
3816 DPRINTK("EXIT, rc=%d\n", rc
);
3821 * sata_std_hardreset - reset host port via SATA phy reset
3822 * @link: link to reset
3823 * @class: resulting class of attached device
3824 * @deadline: deadline jiffies for the operation
3826 * SATA phy-reset host port using DET bits of SControl register,
3827 * wait for !BSY and classify the attached device.
3830 * Kernel thread context (may sleep)
3833 * 0 on success, -errno otherwise.
3835 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3836 unsigned long deadline
)
3838 struct ata_port
*ap
= link
->ap
;
3839 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3845 rc
= sata_link_hardreset(link
, timing
, deadline
);
3847 ata_link_printk(link
, KERN_ERR
,
3848 "COMRESET failed (errno=%d)\n", rc
);
3852 /* TODO: phy layer with polling, timeouts, etc. */
3853 if (ata_link_offline(link
)) {
3854 *class = ATA_DEV_NONE
;
3855 DPRINTK("EXIT, link offline\n");
3859 /* wait a while before checking status */
3860 ata_wait_after_reset(ap
, deadline
);
3862 /* If PMP is supported, we have to do follow-up SRST. Note
3863 * that some PMPs don't send D2H Reg FIS after hardreset at
3864 * all if the first port is empty. Wait for it just for a
3865 * second and request follow-up SRST.
3867 if (ap
->flags
& ATA_FLAG_PMP
) {
3868 ata_wait_ready(ap
, jiffies
+ HZ
);
3872 rc
= ata_wait_ready(ap
, deadline
);
3873 /* link occupied, -ENODEV too is an error */
3875 ata_link_printk(link
, KERN_ERR
,
3876 "COMRESET failed (errno=%d)\n", rc
);
3880 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3882 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3884 DPRINTK("EXIT, class=%u\n", *class);
3889 * ata_std_postreset - standard postreset callback
3890 * @link: the target ata_link
3891 * @classes: classes of attached devices
3893 * This function is invoked after a successful reset. Note that
3894 * the device might have been reset more than once using
3895 * different reset methods before postreset is invoked.
3898 * Kernel thread context (may sleep)
3900 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3902 struct ata_port
*ap
= link
->ap
;
3907 /* print link status */
3908 sata_print_link_status(link
);
3911 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3912 sata_scr_write(link
, SCR_ERROR
, serror
);
3913 link
->eh_info
.serror
= 0;
3915 /* is double-select really necessary? */
3916 if (classes
[0] != ATA_DEV_NONE
)
3917 ap
->ops
->dev_select(ap
, 1);
3918 if (classes
[1] != ATA_DEV_NONE
)
3919 ap
->ops
->dev_select(ap
, 0);
3921 /* bail out if no device is present */
3922 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3923 DPRINTK("EXIT, no device\n");
3927 /* set up device control */
3928 if (ap
->ioaddr
.ctl_addr
)
3929 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3935 * ata_dev_same_device - Determine whether new ID matches configured device
3936 * @dev: device to compare against
3937 * @new_class: class of the new device
3938 * @new_id: IDENTIFY page of the new device
3940 * Compare @new_class and @new_id against @dev and determine
3941 * whether @dev is the device indicated by @new_class and
3948 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3950 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3953 const u16
*old_id
= dev
->id
;
3954 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3955 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3957 if (dev
->class != new_class
) {
3958 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3959 dev
->class, new_class
);
3963 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3964 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3965 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3966 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3968 if (strcmp(model
[0], model
[1])) {
3969 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3970 "'%s' != '%s'\n", model
[0], model
[1]);
3974 if (strcmp(serial
[0], serial
[1])) {
3975 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3976 "'%s' != '%s'\n", serial
[0], serial
[1]);
3984 * ata_dev_reread_id - Re-read IDENTIFY data
3985 * @dev: target ATA device
3986 * @readid_flags: read ID flags
3988 * Re-read IDENTIFY page and make sure @dev is still attached to
3992 * Kernel thread context (may sleep)
3995 * 0 on success, negative errno otherwise
3997 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3999 unsigned int class = dev
->class;
4000 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4004 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4008 /* is the device still there? */
4009 if (!ata_dev_same_device(dev
, class, id
))
4012 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4017 * ata_dev_revalidate - Revalidate ATA device
4018 * @dev: device to revalidate
4019 * @new_class: new class code
4020 * @readid_flags: read ID flags
4022 * Re-read IDENTIFY page, make sure @dev is still attached to the
4023 * port and reconfigure it according to the new IDENTIFY page.
4026 * Kernel thread context (may sleep)
4029 * 0 on success, negative errno otherwise
4031 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4032 unsigned int readid_flags
)
4034 u64 n_sectors
= dev
->n_sectors
;
4037 if (!ata_dev_enabled(dev
))
4040 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4041 if (ata_class_enabled(new_class
) &&
4042 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4043 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4044 dev
->class, new_class
);
4050 rc
= ata_dev_reread_id(dev
, readid_flags
);
4054 /* configure device according to the new ID */
4055 rc
= ata_dev_configure(dev
);
4059 /* verify n_sectors hasn't changed */
4060 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4061 dev
->n_sectors
!= n_sectors
) {
4062 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4064 (unsigned long long)n_sectors
,
4065 (unsigned long long)dev
->n_sectors
);
4067 /* restore original n_sectors */
4068 dev
->n_sectors
= n_sectors
;
4077 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4081 struct ata_blacklist_entry
{
4082 const char *model_num
;
4083 const char *model_rev
;
4084 unsigned long horkage
;
4087 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4088 /* Devices with DMA related problems under Linux */
4089 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4090 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4091 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4092 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4093 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4094 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4095 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4096 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4097 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4098 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4099 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4100 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4101 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4102 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4103 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4104 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4105 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4106 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4107 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4108 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4109 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4110 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4111 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4112 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4113 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4114 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4115 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4116 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4117 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4118 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4119 /* Odd clown on sil3726/4726 PMPs */
4120 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
4121 ATA_HORKAGE_SKIP_PM
},
4123 /* Weird ATAPI devices */
4124 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4126 /* Devices we expect to fail diagnostics */
4128 /* Devices where NCQ should be avoided */
4130 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4131 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4132 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4133 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4135 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4136 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4137 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
4138 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
4139 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4140 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4142 /* Blacklist entries taken from Silicon Image 3124/3132
4143 Windows driver .inf file - also several Linux problem reports */
4144 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4145 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4146 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4148 /* devices which puke on READ_NATIVE_MAX */
4149 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4150 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4151 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4152 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4154 /* Devices which report 1 sector over size HPA */
4155 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4156 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4158 /* Devices which get the IVB wrong */
4159 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4160 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4161 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4162 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4163 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4169 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4175 * check for trailing wildcard: *\0
4177 p
= strchr(patt
, wildchar
);
4178 if (p
&& ((*(p
+ 1)) == 0))
4189 return strncmp(patt
, name
, len
);
4192 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4194 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4195 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4196 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4198 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4199 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4201 while (ad
->model_num
) {
4202 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4203 if (ad
->model_rev
== NULL
)
4205 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4213 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4215 /* We don't support polling DMA.
4216 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4217 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4219 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4220 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4222 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4226 * ata_is_40wire - check drive side detection
4229 * Perform drive side detection decoding, allowing for device vendors
4230 * who can't follow the documentation.
4233 static int ata_is_40wire(struct ata_device
*dev
)
4235 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4236 return ata_drive_40wire_relaxed(dev
->id
);
4237 return ata_drive_40wire(dev
->id
);
4241 * ata_dev_xfermask - Compute supported xfermask of the given device
4242 * @dev: Device to compute xfermask for
4244 * Compute supported xfermask of @dev and store it in
4245 * dev->*_mask. This function is responsible for applying all
4246 * known limits including host controller limits, device
4252 static void ata_dev_xfermask(struct ata_device
*dev
)
4254 struct ata_link
*link
= dev
->link
;
4255 struct ata_port
*ap
= link
->ap
;
4256 struct ata_host
*host
= ap
->host
;
4257 unsigned long xfer_mask
;
4259 /* controller modes available */
4260 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4261 ap
->mwdma_mask
, ap
->udma_mask
);
4263 /* drive modes available */
4264 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4265 dev
->mwdma_mask
, dev
->udma_mask
);
4266 xfer_mask
&= ata_id_xfermask(dev
->id
);
4269 * CFA Advanced TrueIDE timings are not allowed on a shared
4272 if (ata_dev_pair(dev
)) {
4273 /* No PIO5 or PIO6 */
4274 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4275 /* No MWDMA3 or MWDMA 4 */
4276 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4279 if (ata_dma_blacklisted(dev
)) {
4280 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4281 ata_dev_printk(dev
, KERN_WARNING
,
4282 "device is on DMA blacklist, disabling DMA\n");
4285 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4286 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4287 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4288 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4289 "other device, disabling DMA\n");
4292 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4293 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4295 if (ap
->ops
->mode_filter
)
4296 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4298 /* Apply cable rule here. Don't apply it early because when
4299 * we handle hot plug the cable type can itself change.
4300 * Check this last so that we know if the transfer rate was
4301 * solely limited by the cable.
4302 * Unknown or 80 wire cables reported host side are checked
4303 * drive side as well. Cases where we know a 40wire cable
4304 * is used safely for 80 are not checked here.
4306 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4307 /* UDMA/44 or higher would be available */
4308 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4309 (ata_is_40wire(dev
) &&
4310 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4311 ap
->cbl
== ATA_CBL_PATA80
))) {
4312 ata_dev_printk(dev
, KERN_WARNING
,
4313 "limited to UDMA/33 due to 40-wire cable\n");
4314 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4317 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4318 &dev
->mwdma_mask
, &dev
->udma_mask
);
4322 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4323 * @dev: Device to which command will be sent
4325 * Issue SET FEATURES - XFER MODE command to device @dev
4329 * PCI/etc. bus probe sem.
4332 * 0 on success, AC_ERR_* mask otherwise.
4335 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4337 struct ata_taskfile tf
;
4338 unsigned int err_mask
;
4340 /* set up set-features taskfile */
4341 DPRINTK("set features - xfer mode\n");
4343 /* Some controllers and ATAPI devices show flaky interrupt
4344 * behavior after setting xfer mode. Use polling instead.
4346 ata_tf_init(dev
, &tf
);
4347 tf
.command
= ATA_CMD_SET_FEATURES
;
4348 tf
.feature
= SETFEATURES_XFER
;
4349 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4350 tf
.protocol
= ATA_PROT_NODATA
;
4351 /* If we are using IORDY we must send the mode setting command */
4352 if (ata_pio_need_iordy(dev
))
4353 tf
.nsect
= dev
->xfer_mode
;
4354 /* If the device has IORDY and the controller does not - turn it off */
4355 else if (ata_id_has_iordy(dev
->id
))
4357 else /* In the ancient relic department - skip all of this */
4360 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4362 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4366 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4367 * @dev: Device to which command will be sent
4368 * @enable: Whether to enable or disable the feature
4369 * @feature: The sector count represents the feature to set
4371 * Issue SET FEATURES - SATA FEATURES command to device @dev
4372 * on port @ap with sector count
4375 * PCI/etc. bus probe sem.
4378 * 0 on success, AC_ERR_* mask otherwise.
4380 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4383 struct ata_taskfile tf
;
4384 unsigned int err_mask
;
4386 /* set up set-features taskfile */
4387 DPRINTK("set features - SATA features\n");
4389 ata_tf_init(dev
, &tf
);
4390 tf
.command
= ATA_CMD_SET_FEATURES
;
4391 tf
.feature
= enable
;
4392 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4393 tf
.protocol
= ATA_PROT_NODATA
;
4396 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4398 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4403 * ata_dev_init_params - Issue INIT DEV PARAMS command
4404 * @dev: Device to which command will be sent
4405 * @heads: Number of heads (taskfile parameter)
4406 * @sectors: Number of sectors (taskfile parameter)
4409 * Kernel thread context (may sleep)
4412 * 0 on success, AC_ERR_* mask otherwise.
4414 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4415 u16 heads
, u16 sectors
)
4417 struct ata_taskfile tf
;
4418 unsigned int err_mask
;
4420 /* Number of sectors per track 1-255. Number of heads 1-16 */
4421 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4422 return AC_ERR_INVALID
;
4424 /* set up init dev params taskfile */
4425 DPRINTK("init dev params \n");
4427 ata_tf_init(dev
, &tf
);
4428 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4429 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4430 tf
.protocol
= ATA_PROT_NODATA
;
4432 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4434 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4435 /* A clean abort indicates an original or just out of spec drive
4436 and we should continue as we issue the setup based on the
4437 drive reported working geometry */
4438 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4441 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4446 * ata_sg_clean - Unmap DMA memory associated with command
4447 * @qc: Command containing DMA memory to be released
4449 * Unmap all mapped DMA memory associated with this command.
4452 * spin_lock_irqsave(host lock)
4454 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4456 struct ata_port
*ap
= qc
->ap
;
4457 struct scatterlist
*sg
= qc
->__sg
;
4458 int dir
= qc
->dma_dir
;
4459 void *pad_buf
= NULL
;
4461 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4462 WARN_ON(sg
== NULL
);
4464 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4465 WARN_ON(qc
->n_elem
> 1);
4467 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4469 /* if we padded the buffer out to 32-bit bound, and data
4470 * xfer direction is from-device, we must copy from the
4471 * pad buffer back into the supplied buffer
4473 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4474 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4476 if (qc
->flags
& ATA_QCFLAG_SG
) {
4478 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4479 /* restore last sg */
4480 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4482 struct scatterlist
*psg
= &qc
->pad_sgent
;
4483 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4484 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4485 kunmap_atomic(addr
, KM_IRQ0
);
4489 dma_unmap_single(ap
->dev
,
4490 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4493 sg
->length
+= qc
->pad_len
;
4495 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4496 pad_buf
, qc
->pad_len
);
4499 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4504 * ata_fill_sg - Fill PCI IDE PRD table
4505 * @qc: Metadata associated with taskfile to be transferred
4507 * Fill PCI IDE PRD (scatter-gather) table with segments
4508 * associated with the current disk command.
4511 * spin_lock_irqsave(host lock)
4514 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4516 struct ata_port
*ap
= qc
->ap
;
4517 struct scatterlist
*sg
;
4520 WARN_ON(qc
->__sg
== NULL
);
4521 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4524 ata_for_each_sg(sg
, qc
) {
4528 /* determine if physical DMA addr spans 64K boundary.
4529 * Note h/w doesn't support 64-bit, so we unconditionally
4530 * truncate dma_addr_t to u32.
4532 addr
= (u32
) sg_dma_address(sg
);
4533 sg_len
= sg_dma_len(sg
);
4536 offset
= addr
& 0xffff;
4538 if ((offset
+ sg_len
) > 0x10000)
4539 len
= 0x10000 - offset
;
4541 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4542 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4543 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4552 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4556 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4557 * @qc: Metadata associated with taskfile to be transferred
4559 * Fill PCI IDE PRD (scatter-gather) table with segments
4560 * associated with the current disk command. Perform the fill
4561 * so that we avoid writing any length 64K records for
4562 * controllers that don't follow the spec.
4565 * spin_lock_irqsave(host lock)
4568 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4570 struct ata_port
*ap
= qc
->ap
;
4571 struct scatterlist
*sg
;
4574 WARN_ON(qc
->__sg
== NULL
);
4575 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4578 ata_for_each_sg(sg
, qc
) {
4580 u32 sg_len
, len
, blen
;
4582 /* determine if physical DMA addr spans 64K boundary.
4583 * Note h/w doesn't support 64-bit, so we unconditionally
4584 * truncate dma_addr_t to u32.
4586 addr
= (u32
) sg_dma_address(sg
);
4587 sg_len
= sg_dma_len(sg
);
4590 offset
= addr
& 0xffff;
4592 if ((offset
+ sg_len
) > 0x10000)
4593 len
= 0x10000 - offset
;
4595 blen
= len
& 0xffff;
4596 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4598 /* Some PATA chipsets like the CS5530 can't
4599 cope with 0x0000 meaning 64K as the spec says */
4600 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4602 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4604 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4605 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4614 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4618 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4619 * @qc: Metadata associated with taskfile to check
4621 * Allow low-level driver to filter ATA PACKET commands, returning
4622 * a status indicating whether or not it is OK to use DMA for the
4623 * supplied PACKET command.
4626 * spin_lock_irqsave(host lock)
4628 * RETURNS: 0 when ATAPI DMA can be used
4631 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4633 struct ata_port
*ap
= qc
->ap
;
4635 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4636 * few ATAPI devices choke on such DMA requests.
4638 if (unlikely(qc
->nbytes
& 15))
4641 if (ap
->ops
->check_atapi_dma
)
4642 return ap
->ops
->check_atapi_dma(qc
);
4648 * atapi_qc_may_overflow - Check whether data transfer may overflow
4649 * @qc: ATA command in question
4651 * ATAPI commands which transfer variable length data to host
4652 * might overflow due to application error or hardare bug. This
4653 * function checks whether overflow should be drained and ignored
4660 * 1 if @qc may overflow; otherwise, 0.
4662 static int atapi_qc_may_overflow(struct ata_queued_cmd
*qc
)
4664 if (qc
->tf
.protocol
!= ATA_PROT_ATAPI
&&
4665 qc
->tf
.protocol
!= ATA_PROT_ATAPI_DMA
)
4668 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4671 switch (qc
->cdb
[0]) {
4677 case GPCMD_READ_CD_MSF
:
4685 * ata_std_qc_defer - Check whether a qc needs to be deferred
4686 * @qc: ATA command in question
4688 * Non-NCQ commands cannot run with any other command, NCQ or
4689 * not. As upper layer only knows the queue depth, we are
4690 * responsible for maintaining exclusion. This function checks
4691 * whether a new command @qc can be issued.
4694 * spin_lock_irqsave(host lock)
4697 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4699 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4701 struct ata_link
*link
= qc
->dev
->link
;
4703 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4704 if (!ata_tag_valid(link
->active_tag
))
4707 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4711 return ATA_DEFER_LINK
;
4715 * ata_qc_prep - Prepare taskfile for submission
4716 * @qc: Metadata associated with taskfile to be prepared
4718 * Prepare ATA taskfile for submission.
4721 * spin_lock_irqsave(host lock)
4723 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4725 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4732 * ata_dumb_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_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4742 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4745 ata_fill_sg_dumb(qc
);
4748 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4751 * ata_sg_init_one - Associate command with memory buffer
4752 * @qc: Command to be associated
4753 * @buf: Memory buffer
4754 * @buflen: Length of memory buffer, in bytes.
4756 * Initialize the data-related elements of queued_cmd @qc
4757 * to point to a single memory buffer, @buf of byte length @buflen.
4760 * spin_lock_irqsave(host lock)
4763 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4765 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4767 qc
->__sg
= &qc
->sgent
;
4769 qc
->orig_n_elem
= 1;
4771 qc
->nbytes
= buflen
;
4772 qc
->cursg
= qc
->__sg
;
4774 sg_init_one(&qc
->sgent
, buf
, buflen
);
4778 * ata_sg_init - Associate command with scatter-gather table.
4779 * @qc: Command to be associated
4780 * @sg: Scatter-gather table.
4781 * @n_elem: Number of elements in s/g table.
4783 * Initialize the data-related elements of queued_cmd @qc
4784 * to point to a scatter-gather table @sg, containing @n_elem
4788 * spin_lock_irqsave(host lock)
4791 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4792 unsigned int n_elem
)
4794 qc
->flags
|= ATA_QCFLAG_SG
;
4796 qc
->n_elem
= n_elem
;
4797 qc
->orig_n_elem
= n_elem
;
4798 qc
->cursg
= qc
->__sg
;
4802 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4803 * @qc: Command with memory buffer to be mapped.
4805 * DMA-map the memory buffer associated with queued_cmd @qc.
4808 * spin_lock_irqsave(host lock)
4811 * Zero on success, negative on error.
4814 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4816 struct ata_port
*ap
= qc
->ap
;
4817 int dir
= qc
->dma_dir
;
4818 struct scatterlist
*sg
= qc
->__sg
;
4819 dma_addr_t dma_address
;
4822 /* we must lengthen transfers to end on a 32-bit boundary */
4823 qc
->pad_len
= sg
->length
& 3;
4825 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4826 struct scatterlist
*psg
= &qc
->pad_sgent
;
4828 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4830 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4832 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4833 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4836 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4837 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4839 sg
->length
-= qc
->pad_len
;
4840 if (sg
->length
== 0)
4843 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4844 sg
->length
, qc
->pad_len
);
4852 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4854 if (dma_mapping_error(dma_address
)) {
4856 sg
->length
+= qc
->pad_len
;
4860 sg_dma_address(sg
) = dma_address
;
4861 sg_dma_len(sg
) = sg
->length
;
4864 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4865 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4871 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4872 * @qc: Command with scatter-gather table to be mapped.
4874 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4877 * spin_lock_irqsave(host lock)
4880 * Zero on success, negative on error.
4884 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4886 struct ata_port
*ap
= qc
->ap
;
4887 struct scatterlist
*sg
= qc
->__sg
;
4888 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4889 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4891 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4892 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4894 /* we must lengthen transfers to end on a 32-bit boundary */
4895 qc
->pad_len
= lsg
->length
& 3;
4897 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4898 struct scatterlist
*psg
= &qc
->pad_sgent
;
4899 unsigned int offset
;
4901 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4903 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4906 * psg->page/offset are used to copy to-be-written
4907 * data in this function or read data in ata_sg_clean.
4909 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4910 sg_init_table(psg
, 1);
4911 sg_set_page(psg
, nth_page(sg_page(lsg
), offset
>> PAGE_SHIFT
),
4912 qc
->pad_len
, offset_in_page(offset
));
4914 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4915 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4916 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4917 kunmap_atomic(addr
, KM_IRQ0
);
4920 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4921 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4923 lsg
->length
-= qc
->pad_len
;
4924 if (lsg
->length
== 0)
4927 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4928 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4931 pre_n_elem
= qc
->n_elem
;
4932 if (trim_sg
&& pre_n_elem
)
4941 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4943 /* restore last sg */
4944 lsg
->length
+= qc
->pad_len
;
4948 DPRINTK("%d sg elements mapped\n", n_elem
);
4951 qc
->n_elem
= n_elem
;
4957 * swap_buf_le16 - swap halves of 16-bit words in place
4958 * @buf: Buffer to swap
4959 * @buf_words: Number of 16-bit words in buffer.
4961 * Swap halves of 16-bit words if needed to convert from
4962 * little-endian byte order to native cpu byte order, or
4966 * Inherited from caller.
4968 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4973 for (i
= 0; i
< buf_words
; i
++)
4974 buf
[i
] = le16_to_cpu(buf
[i
]);
4975 #endif /* __BIG_ENDIAN */
4979 * ata_data_xfer - Transfer data by PIO
4980 * @adev: device to target
4982 * @buflen: buffer length
4983 * @write_data: read/write
4985 * Transfer data from/to the device data register by PIO.
4988 * Inherited from caller.
4990 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
4991 unsigned int buflen
, int write_data
)
4993 struct ata_port
*ap
= adev
->link
->ap
;
4994 unsigned int words
= buflen
>> 1;
4996 /* Transfer multiple of 2 bytes */
4998 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
5000 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
5002 /* Transfer trailing 1 byte, if any. */
5003 if (unlikely(buflen
& 0x01)) {
5004 u16 align_buf
[1] = { 0 };
5005 unsigned char *trailing_buf
= buf
+ buflen
- 1;
5008 memcpy(align_buf
, trailing_buf
, 1);
5009 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
5011 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
5012 memcpy(trailing_buf
, align_buf
, 1);
5018 * ata_data_xfer_noirq - Transfer data by PIO
5019 * @adev: device to target
5021 * @buflen: buffer length
5022 * @write_data: read/write
5024 * Transfer data from/to the device data register by PIO. Do the
5025 * transfer with interrupts disabled.
5028 * Inherited from caller.
5030 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
5031 unsigned int buflen
, int write_data
)
5033 unsigned long flags
;
5034 local_irq_save(flags
);
5035 ata_data_xfer(adev
, buf
, buflen
, write_data
);
5036 local_irq_restore(flags
);
5041 * ata_pio_sector - Transfer a sector of data.
5042 * @qc: Command on going
5044 * Transfer qc->sect_size bytes of data from/to the ATA device.
5047 * Inherited from caller.
5050 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
5052 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5053 struct ata_port
*ap
= qc
->ap
;
5055 unsigned int offset
;
5058 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
5059 ap
->hsm_task_state
= HSM_ST_LAST
;
5061 page
= sg_page(qc
->cursg
);
5062 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
5064 /* get the current page and offset */
5065 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5066 offset
%= PAGE_SIZE
;
5068 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5070 if (PageHighMem(page
)) {
5071 unsigned long flags
;
5073 /* FIXME: use a bounce buffer */
5074 local_irq_save(flags
);
5075 buf
= kmap_atomic(page
, KM_IRQ0
);
5077 /* do the actual data transfer */
5078 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5080 kunmap_atomic(buf
, KM_IRQ0
);
5081 local_irq_restore(flags
);
5083 buf
= page_address(page
);
5084 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5087 qc
->curbytes
+= qc
->sect_size
;
5088 qc
->cursg_ofs
+= qc
->sect_size
;
5090 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
5091 qc
->cursg
= sg_next(qc
->cursg
);
5097 * ata_pio_sectors - Transfer one or many sectors.
5098 * @qc: Command on going
5100 * Transfer one or many sectors of data from/to the
5101 * ATA device for the DRQ request.
5104 * Inherited from caller.
5107 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
5109 if (is_multi_taskfile(&qc
->tf
)) {
5110 /* READ/WRITE MULTIPLE */
5113 WARN_ON(qc
->dev
->multi_count
== 0);
5115 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
5116 qc
->dev
->multi_count
);
5122 ata_altstatus(qc
->ap
); /* flush */
5126 * atapi_send_cdb - Write CDB bytes to hardware
5127 * @ap: Port to which ATAPI device is attached.
5128 * @qc: Taskfile currently active
5130 * When device has indicated its readiness to accept
5131 * a CDB, this function is called. Send the CDB.
5137 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5140 DPRINTK("send cdb\n");
5141 WARN_ON(qc
->dev
->cdb_len
< 12);
5143 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
5144 ata_altstatus(ap
); /* flush */
5146 switch (qc
->tf
.protocol
) {
5147 case ATA_PROT_ATAPI
:
5148 ap
->hsm_task_state
= HSM_ST
;
5150 case ATA_PROT_ATAPI_NODATA
:
5151 ap
->hsm_task_state
= HSM_ST_LAST
;
5153 case ATA_PROT_ATAPI_DMA
:
5154 ap
->hsm_task_state
= HSM_ST_LAST
;
5155 /* initiate bmdma */
5156 ap
->ops
->bmdma_start(qc
);
5162 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5163 * @qc: Command on going
5164 * @bytes: number of bytes
5166 * Transfer Transfer data from/to the ATAPI device.
5169 * Inherited from caller.
5172 static int __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
5174 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5175 struct ata_port
*ap
= qc
->ap
;
5176 struct ata_eh_info
*ehi
= &qc
->dev
->link
->eh_info
;
5177 struct scatterlist
*sg
;
5180 unsigned int offset
, count
;
5184 if (unlikely(!sg
)) {
5186 * The end of qc->sg is reached and the device expects
5187 * more data to transfer. In order not to overrun qc->sg
5188 * and fulfill length specified in the byte count register,
5189 * - for read case, discard trailing data from the device
5190 * - for write case, padding zero data to the device
5192 u16 pad_buf
[1] = { 0 };
5195 if (bytes
> qc
->curbytes
- qc
->nbytes
+ ATAPI_MAX_DRAIN
) {
5196 ata_ehi_push_desc(ehi
, "too much trailing data "
5197 "buf=%u cur=%u bytes=%u",
5198 qc
->nbytes
, qc
->curbytes
, bytes
);
5202 /* overflow is exptected for misc ATAPI commands */
5203 if (bytes
&& !atapi_qc_may_overflow(qc
))
5204 ata_dev_printk(qc
->dev
, KERN_WARNING
, "ATAPI %u bytes "
5205 "trailing data (cdb=%02x nbytes=%u)\n",
5206 bytes
, qc
->cdb
[0], qc
->nbytes
);
5208 for (i
= 0; i
< (bytes
+ 1) / 2; i
++)
5209 ap
->ops
->data_xfer(qc
->dev
, (unsigned char *)pad_buf
, 2, do_write
);
5211 qc
->curbytes
+= bytes
;
5217 offset
= sg
->offset
+ qc
->cursg_ofs
;
5219 /* get the current page and offset */
5220 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5221 offset
%= PAGE_SIZE
;
5223 /* don't overrun current sg */
5224 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5226 /* don't cross page boundaries */
5227 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5229 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5231 if (PageHighMem(page
)) {
5232 unsigned long flags
;
5234 /* FIXME: use bounce buffer */
5235 local_irq_save(flags
);
5236 buf
= kmap_atomic(page
, KM_IRQ0
);
5238 /* do the actual data transfer */
5239 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5241 kunmap_atomic(buf
, KM_IRQ0
);
5242 local_irq_restore(flags
);
5244 buf
= page_address(page
);
5245 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5249 if ((count
& 1) && bytes
)
5251 qc
->curbytes
+= count
;
5252 qc
->cursg_ofs
+= count
;
5254 if (qc
->cursg_ofs
== sg
->length
) {
5255 qc
->cursg
= sg_next(qc
->cursg
);
5266 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5267 * @qc: Command on going
5269 * Transfer Transfer data from/to the ATAPI device.
5272 * Inherited from caller.
5275 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5277 struct ata_port
*ap
= qc
->ap
;
5278 struct ata_device
*dev
= qc
->dev
;
5279 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5280 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5282 /* Abuse qc->result_tf for temp storage of intermediate TF
5283 * here to save some kernel stack usage.
5284 * For normal completion, qc->result_tf is not relevant. For
5285 * error, qc->result_tf is later overwritten by ata_qc_complete().
5286 * So, the correctness of qc->result_tf is not affected.
5288 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5289 ireason
= qc
->result_tf
.nsect
;
5290 bc_lo
= qc
->result_tf
.lbam
;
5291 bc_hi
= qc
->result_tf
.lbah
;
5292 bytes
= (bc_hi
<< 8) | bc_lo
;
5294 /* shall be cleared to zero, indicating xfer of data */
5295 if (ireason
& (1 << 0))
5298 /* make sure transfer direction matches expected */
5299 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5300 if (do_write
!= i_write
)
5303 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5305 if (__atapi_pio_bytes(qc
, bytes
))
5307 ata_altstatus(ap
); /* flush */
5312 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5313 qc
->err_mask
|= AC_ERR_HSM
;
5314 ap
->hsm_task_state
= HSM_ST_ERR
;
5318 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5319 * @ap: the target ata_port
5323 * 1 if ok in workqueue, 0 otherwise.
5326 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5328 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5331 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5332 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5333 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5336 if (ata_is_atapi(qc
->tf
.protocol
) &&
5337 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5345 * ata_hsm_qc_complete - finish a qc running on standard HSM
5346 * @qc: Command to complete
5347 * @in_wq: 1 if called from workqueue, 0 otherwise
5349 * Finish @qc which is running on standard HSM.
5352 * If @in_wq is zero, spin_lock_irqsave(host lock).
5353 * Otherwise, none on entry and grabs host lock.
5355 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5357 struct ata_port
*ap
= qc
->ap
;
5358 unsigned long flags
;
5360 if (ap
->ops
->error_handler
) {
5362 spin_lock_irqsave(ap
->lock
, flags
);
5364 /* EH might have kicked in while host lock is
5367 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5369 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5370 ap
->ops
->irq_on(ap
);
5371 ata_qc_complete(qc
);
5373 ata_port_freeze(ap
);
5376 spin_unlock_irqrestore(ap
->lock
, flags
);
5378 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5379 ata_qc_complete(qc
);
5381 ata_port_freeze(ap
);
5385 spin_lock_irqsave(ap
->lock
, flags
);
5386 ap
->ops
->irq_on(ap
);
5387 ata_qc_complete(qc
);
5388 spin_unlock_irqrestore(ap
->lock
, flags
);
5390 ata_qc_complete(qc
);
5395 * ata_hsm_move - move the HSM to the next state.
5396 * @ap: the target ata_port
5398 * @status: current device status
5399 * @in_wq: 1 if called from workqueue, 0 otherwise
5402 * 1 when poll next status needed, 0 otherwise.
5404 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5405 u8 status
, int in_wq
)
5407 unsigned long flags
= 0;
5410 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5412 /* Make sure ata_qc_issue_prot() does not throw things
5413 * like DMA polling into the workqueue. Notice that
5414 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5416 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5419 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5420 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5422 switch (ap
->hsm_task_state
) {
5424 /* Send first data block or PACKET CDB */
5426 /* If polling, we will stay in the work queue after
5427 * sending the data. Otherwise, interrupt handler
5428 * takes over after sending the data.
5430 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5432 /* check device status */
5433 if (unlikely((status
& ATA_DRQ
) == 0)) {
5434 /* handle BSY=0, DRQ=0 as error */
5435 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5436 /* device stops HSM for abort/error */
5437 qc
->err_mask
|= AC_ERR_DEV
;
5439 /* HSM violation. Let EH handle this */
5440 qc
->err_mask
|= AC_ERR_HSM
;
5442 ap
->hsm_task_state
= HSM_ST_ERR
;
5446 /* Device should not ask for data transfer (DRQ=1)
5447 * when it finds something wrong.
5448 * We ignore DRQ here and stop the HSM by
5449 * changing hsm_task_state to HSM_ST_ERR and
5450 * let the EH abort the command or reset the device.
5452 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5453 /* Some ATAPI tape drives forget to clear the ERR bit
5454 * when doing the next command (mostly request sense).
5455 * We ignore ERR here to workaround and proceed sending
5458 if (!(qc
->dev
->horkage
& ATA_HORKAGE_STUCK_ERR
)) {
5459 ata_port_printk(ap
, KERN_WARNING
,
5460 "DRQ=1 with device error, "
5461 "dev_stat 0x%X\n", status
);
5462 qc
->err_mask
|= AC_ERR_HSM
;
5463 ap
->hsm_task_state
= HSM_ST_ERR
;
5468 /* Send the CDB (atapi) or the first data block (ata pio out).
5469 * During the state transition, interrupt handler shouldn't
5470 * be invoked before the data transfer is complete and
5471 * hsm_task_state is changed. Hence, the following locking.
5474 spin_lock_irqsave(ap
->lock
, flags
);
5476 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5477 /* PIO data out protocol.
5478 * send first data block.
5481 /* ata_pio_sectors() might change the state
5482 * to HSM_ST_LAST. so, the state is changed here
5483 * before ata_pio_sectors().
5485 ap
->hsm_task_state
= HSM_ST
;
5486 ata_pio_sectors(qc
);
5489 atapi_send_cdb(ap
, qc
);
5492 spin_unlock_irqrestore(ap
->lock
, flags
);
5494 /* if polling, ata_pio_task() handles the rest.
5495 * otherwise, interrupt handler takes over from here.
5500 /* complete command or read/write the data register */
5501 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5502 /* ATAPI PIO protocol */
5503 if ((status
& ATA_DRQ
) == 0) {
5504 /* No more data to transfer or device error.
5505 * Device error will be tagged in HSM_ST_LAST.
5507 ap
->hsm_task_state
= HSM_ST_LAST
;
5511 /* Device should not ask for data transfer (DRQ=1)
5512 * when it finds something wrong.
5513 * We ignore DRQ here and stop the HSM by
5514 * changing hsm_task_state to HSM_ST_ERR and
5515 * let the EH abort the command or reset the device.
5517 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5518 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5519 "device error, dev_stat 0x%X\n",
5521 qc
->err_mask
|= AC_ERR_HSM
;
5522 ap
->hsm_task_state
= HSM_ST_ERR
;
5526 atapi_pio_bytes(qc
);
5528 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5529 /* bad ireason reported by device */
5533 /* ATA PIO protocol */
5534 if (unlikely((status
& ATA_DRQ
) == 0)) {
5535 /* handle BSY=0, DRQ=0 as error */
5536 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5537 /* device stops HSM for abort/error */
5538 qc
->err_mask
|= AC_ERR_DEV
;
5540 /* HSM violation. Let EH handle this.
5541 * Phantom devices also trigger this
5542 * condition. Mark hint.
5544 qc
->err_mask
|= AC_ERR_HSM
|
5547 ap
->hsm_task_state
= HSM_ST_ERR
;
5551 /* For PIO reads, some devices may ask for
5552 * data transfer (DRQ=1) alone with ERR=1.
5553 * We respect DRQ here and transfer one
5554 * block of junk data before changing the
5555 * hsm_task_state to HSM_ST_ERR.
5557 * For PIO writes, ERR=1 DRQ=1 doesn't make
5558 * sense since the data block has been
5559 * transferred to the device.
5561 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5562 /* data might be corrputed */
5563 qc
->err_mask
|= AC_ERR_DEV
;
5565 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5566 ata_pio_sectors(qc
);
5567 status
= ata_wait_idle(ap
);
5570 if (status
& (ATA_BUSY
| ATA_DRQ
))
5571 qc
->err_mask
|= AC_ERR_HSM
;
5573 /* ata_pio_sectors() might change the
5574 * state to HSM_ST_LAST. so, the state
5575 * is changed after ata_pio_sectors().
5577 ap
->hsm_task_state
= HSM_ST_ERR
;
5581 ata_pio_sectors(qc
);
5583 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5584 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5586 status
= ata_wait_idle(ap
);
5595 if (unlikely(!ata_ok(status
))) {
5596 qc
->err_mask
|= __ac_err_mask(status
);
5597 ap
->hsm_task_state
= HSM_ST_ERR
;
5601 /* no more data to transfer */
5602 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5603 ap
->print_id
, qc
->dev
->devno
, status
);
5605 WARN_ON(qc
->err_mask
);
5607 ap
->hsm_task_state
= HSM_ST_IDLE
;
5609 /* complete taskfile transaction */
5610 ata_hsm_qc_complete(qc
, in_wq
);
5616 /* make sure qc->err_mask is available to
5617 * know what's wrong and recover
5619 WARN_ON(qc
->err_mask
== 0);
5621 ap
->hsm_task_state
= HSM_ST_IDLE
;
5623 /* complete taskfile transaction */
5624 ata_hsm_qc_complete(qc
, in_wq
);
5636 static void ata_pio_task(struct work_struct
*work
)
5638 struct ata_port
*ap
=
5639 container_of(work
, struct ata_port
, port_task
.work
);
5640 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5645 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5648 * This is purely heuristic. This is a fast path.
5649 * Sometimes when we enter, BSY will be cleared in
5650 * a chk-status or two. If not, the drive is probably seeking
5651 * or something. Snooze for a couple msecs, then
5652 * chk-status again. If still busy, queue delayed work.
5654 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5655 if (status
& ATA_BUSY
) {
5657 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5658 if (status
& ATA_BUSY
) {
5659 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5665 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5667 /* another command or interrupt handler
5668 * may be running at this point.
5675 * ata_qc_new - Request an available ATA command, for queueing
5676 * @ap: Port associated with device @dev
5677 * @dev: Device from whom we request an available command structure
5683 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5685 struct ata_queued_cmd
*qc
= NULL
;
5688 /* no command while frozen */
5689 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5692 /* the last tag is reserved for internal command. */
5693 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5694 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5695 qc
= __ata_qc_from_tag(ap
, i
);
5706 * ata_qc_new_init - Request an available ATA command, and initialize it
5707 * @dev: Device from whom we request an available command structure
5713 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5715 struct ata_port
*ap
= dev
->link
->ap
;
5716 struct ata_queued_cmd
*qc
;
5718 qc
= ata_qc_new(ap
);
5731 * ata_qc_free - free unused ata_queued_cmd
5732 * @qc: Command to complete
5734 * Designed to free unused ata_queued_cmd object
5735 * in case something prevents using it.
5738 * spin_lock_irqsave(host lock)
5740 void ata_qc_free(struct ata_queued_cmd
*qc
)
5742 struct ata_port
*ap
= qc
->ap
;
5745 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5749 if (likely(ata_tag_valid(tag
))) {
5750 qc
->tag
= ATA_TAG_POISON
;
5751 clear_bit(tag
, &ap
->qc_allocated
);
5755 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5757 struct ata_port
*ap
= qc
->ap
;
5758 struct ata_link
*link
= qc
->dev
->link
;
5760 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5761 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5763 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5766 /* command should be marked inactive atomically with qc completion */
5767 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5768 link
->sactive
&= ~(1 << qc
->tag
);
5770 ap
->nr_active_links
--;
5772 link
->active_tag
= ATA_TAG_POISON
;
5773 ap
->nr_active_links
--;
5776 /* clear exclusive status */
5777 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5778 ap
->excl_link
== link
))
5779 ap
->excl_link
= NULL
;
5781 /* atapi: mark qc as inactive to prevent the interrupt handler
5782 * from completing the command twice later, before the error handler
5783 * is called. (when rc != 0 and atapi request sense is needed)
5785 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5786 ap
->qc_active
&= ~(1 << qc
->tag
);
5788 /* call completion callback */
5789 qc
->complete_fn(qc
);
5792 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5794 struct ata_port
*ap
= qc
->ap
;
5796 qc
->result_tf
.flags
= qc
->tf
.flags
;
5797 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5800 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
5802 struct ata_device
*dev
= qc
->dev
;
5804 if (ata_tag_internal(qc
->tag
))
5807 if (ata_is_nodata(qc
->tf
.protocol
))
5810 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
5813 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
5817 * ata_qc_complete - Complete an active ATA command
5818 * @qc: Command to complete
5819 * @err_mask: ATA Status register contents
5821 * Indicate to the mid and upper layers that an ATA
5822 * command has completed, with either an ok or not-ok status.
5825 * spin_lock_irqsave(host lock)
5827 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5829 struct ata_port
*ap
= qc
->ap
;
5831 /* XXX: New EH and old EH use different mechanisms to
5832 * synchronize EH with regular execution path.
5834 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5835 * Normal execution path is responsible for not accessing a
5836 * failed qc. libata core enforces the rule by returning NULL
5837 * from ata_qc_from_tag() for failed qcs.
5839 * Old EH depends on ata_qc_complete() nullifying completion
5840 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5841 * not synchronize with interrupt handler. Only PIO task is
5844 if (ap
->ops
->error_handler
) {
5845 struct ata_device
*dev
= qc
->dev
;
5846 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5848 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5850 if (unlikely(qc
->err_mask
))
5851 qc
->flags
|= ATA_QCFLAG_FAILED
;
5853 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5854 if (!ata_tag_internal(qc
->tag
)) {
5855 /* always fill result TF for failed qc */
5857 ata_qc_schedule_eh(qc
);
5862 /* read result TF if requested */
5863 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5866 /* Some commands need post-processing after successful
5869 switch (qc
->tf
.command
) {
5870 case ATA_CMD_SET_FEATURES
:
5871 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5872 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5875 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5876 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5877 /* revalidate device */
5878 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5879 ata_port_schedule_eh(ap
);
5883 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5887 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
5888 ata_verify_xfer(qc
);
5890 __ata_qc_complete(qc
);
5892 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5895 /* read result TF if failed or requested */
5896 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5899 __ata_qc_complete(qc
);
5904 * ata_qc_complete_multiple - Complete multiple qcs successfully
5905 * @ap: port in question
5906 * @qc_active: new qc_active mask
5907 * @finish_qc: LLDD callback invoked before completing a qc
5909 * Complete in-flight commands. This functions is meant to be
5910 * called from low-level driver's interrupt routine to complete
5911 * requests normally. ap->qc_active and @qc_active is compared
5912 * and commands are completed accordingly.
5915 * spin_lock_irqsave(host lock)
5918 * Number of completed commands on success, -errno otherwise.
5920 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5921 void (*finish_qc
)(struct ata_queued_cmd
*))
5927 done_mask
= ap
->qc_active
^ qc_active
;
5929 if (unlikely(done_mask
& qc_active
)) {
5930 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5931 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5935 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5936 struct ata_queued_cmd
*qc
;
5938 if (!(done_mask
& (1 << i
)))
5941 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5944 ata_qc_complete(qc
);
5953 * ata_qc_issue - issue taskfile to device
5954 * @qc: command to issue to device
5956 * Prepare an ATA command to submission to device.
5957 * This includes mapping the data into a DMA-able
5958 * area, filling in the S/G table, and finally
5959 * writing the taskfile to hardware, starting the command.
5962 * spin_lock_irqsave(host lock)
5964 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5966 struct ata_port
*ap
= qc
->ap
;
5967 struct ata_link
*link
= qc
->dev
->link
;
5968 u8 prot
= qc
->tf
.protocol
;
5970 /* Make sure only one non-NCQ command is outstanding. The
5971 * check is skipped for old EH because it reuses active qc to
5972 * request ATAPI sense.
5974 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5976 if (prot
== ATA_PROT_NCQ
) {
5977 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5980 ap
->nr_active_links
++;
5981 link
->sactive
|= 1 << qc
->tag
;
5983 WARN_ON(link
->sactive
);
5985 ap
->nr_active_links
++;
5986 link
->active_tag
= qc
->tag
;
5989 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5990 ap
->qc_active
|= 1 << qc
->tag
;
5992 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5993 (ap
->flags
& ATA_FLAG_PIO_DMA
))) {
5994 if (qc
->flags
& ATA_QCFLAG_SG
) {
5995 if (ata_sg_setup(qc
))
5997 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5998 if (ata_sg_setup_one(qc
))
6002 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6005 /* if device is sleeping, schedule softreset and abort the link */
6006 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
6007 link
->eh_info
.action
|= ATA_EH_SOFTRESET
;
6008 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
6009 ata_link_abort(link
);
6013 ap
->ops
->qc_prep(qc
);
6015 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
6016 if (unlikely(qc
->err_mask
))
6021 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6022 qc
->err_mask
|= AC_ERR_SYSTEM
;
6024 ata_qc_complete(qc
);
6028 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6029 * @qc: command to issue to device
6031 * Using various libata functions and hooks, this function
6032 * starts an ATA command. ATA commands are grouped into
6033 * classes called "protocols", and issuing each type of protocol
6034 * is slightly different.
6036 * May be used as the qc_issue() entry in ata_port_operations.
6039 * spin_lock_irqsave(host lock)
6042 * Zero on success, AC_ERR_* mask on failure
6045 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
6047 struct ata_port
*ap
= qc
->ap
;
6049 /* Use polling pio if the LLD doesn't handle
6050 * interrupt driven pio and atapi CDB interrupt.
6052 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
6053 switch (qc
->tf
.protocol
) {
6055 case ATA_PROT_NODATA
:
6056 case ATA_PROT_ATAPI
:
6057 case ATA_PROT_ATAPI_NODATA
:
6058 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
6060 case ATA_PROT_ATAPI_DMA
:
6061 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
6062 /* see ata_dma_blacklisted() */
6070 /* select the device */
6071 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
6073 /* start the command */
6074 switch (qc
->tf
.protocol
) {
6075 case ATA_PROT_NODATA
:
6076 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6077 ata_qc_set_polling(qc
);
6079 ata_tf_to_host(ap
, &qc
->tf
);
6080 ap
->hsm_task_state
= HSM_ST_LAST
;
6082 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6083 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6088 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6090 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6091 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6092 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
6093 ap
->hsm_task_state
= HSM_ST_LAST
;
6097 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6098 ata_qc_set_polling(qc
);
6100 ata_tf_to_host(ap
, &qc
->tf
);
6102 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
6103 /* PIO data out protocol */
6104 ap
->hsm_task_state
= HSM_ST_FIRST
;
6105 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6107 /* always send first data block using
6108 * the ata_pio_task() codepath.
6111 /* PIO data in protocol */
6112 ap
->hsm_task_state
= HSM_ST
;
6114 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6115 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6117 /* if polling, ata_pio_task() handles the rest.
6118 * otherwise, interrupt handler takes over from here.
6124 case ATA_PROT_ATAPI
:
6125 case ATA_PROT_ATAPI_NODATA
:
6126 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6127 ata_qc_set_polling(qc
);
6129 ata_tf_to_host(ap
, &qc
->tf
);
6131 ap
->hsm_task_state
= HSM_ST_FIRST
;
6133 /* send cdb by polling if no cdb interrupt */
6134 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
6135 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
6136 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6139 case ATA_PROT_ATAPI_DMA
:
6140 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6142 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6143 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6144 ap
->hsm_task_state
= HSM_ST_FIRST
;
6146 /* send cdb by polling if no cdb interrupt */
6147 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6148 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6153 return AC_ERR_SYSTEM
;
6160 * ata_host_intr - Handle host interrupt for given (port, task)
6161 * @ap: Port on which interrupt arrived (possibly...)
6162 * @qc: Taskfile currently active in engine
6164 * Handle host interrupt for given queued command. Currently,
6165 * only DMA interrupts are handled. All other commands are
6166 * handled via polling with interrupts disabled (nIEN bit).
6169 * spin_lock_irqsave(host lock)
6172 * One if interrupt was handled, zero if not (shared irq).
6175 inline unsigned int ata_host_intr(struct ata_port
*ap
,
6176 struct ata_queued_cmd
*qc
)
6178 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6179 u8 status
, host_stat
= 0;
6181 VPRINTK("ata%u: protocol %d task_state %d\n",
6182 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
6184 /* Check whether we are expecting interrupt in this state */
6185 switch (ap
->hsm_task_state
) {
6187 /* Some pre-ATAPI-4 devices assert INTRQ
6188 * at this state when ready to receive CDB.
6191 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6192 * The flag was turned on only for atapi devices. No
6193 * need to check ata_is_atapi(qc->tf.protocol) again.
6195 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6199 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6200 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
6201 /* check status of DMA engine */
6202 host_stat
= ap
->ops
->bmdma_status(ap
);
6203 VPRINTK("ata%u: host_stat 0x%X\n",
6204 ap
->print_id
, host_stat
);
6206 /* if it's not our irq... */
6207 if (!(host_stat
& ATA_DMA_INTR
))
6210 /* before we do anything else, clear DMA-Start bit */
6211 ap
->ops
->bmdma_stop(qc
);
6213 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6214 /* error when transfering data to/from memory */
6215 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6216 ap
->hsm_task_state
= HSM_ST_ERR
;
6226 /* check altstatus */
6227 status
= ata_altstatus(ap
);
6228 if (status
& ATA_BUSY
)
6231 /* check main status, clearing INTRQ */
6232 status
= ata_chk_status(ap
);
6233 if (unlikely(status
& ATA_BUSY
))
6236 /* ack bmdma irq events */
6237 ap
->ops
->irq_clear(ap
);
6239 ata_hsm_move(ap
, qc
, status
, 0);
6241 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6242 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
6243 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6245 return 1; /* irq handled */
6248 ap
->stats
.idle_irq
++;
6251 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6253 ap
->ops
->irq_clear(ap
);
6254 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6258 return 0; /* irq not handled */
6262 * ata_interrupt - Default ATA host interrupt handler
6263 * @irq: irq line (unused)
6264 * @dev_instance: pointer to our ata_host information structure
6266 * Default interrupt handler for PCI IDE devices. Calls
6267 * ata_host_intr() for each port that is not disabled.
6270 * Obtains host lock during operation.
6273 * IRQ_NONE or IRQ_HANDLED.
6276 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6278 struct ata_host
*host
= dev_instance
;
6280 unsigned int handled
= 0;
6281 unsigned long flags
;
6283 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6284 spin_lock_irqsave(&host
->lock
, flags
);
6286 for (i
= 0; i
< host
->n_ports
; i
++) {
6287 struct ata_port
*ap
;
6289 ap
= host
->ports
[i
];
6291 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6292 struct ata_queued_cmd
*qc
;
6294 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6295 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6296 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6297 handled
|= ata_host_intr(ap
, qc
);
6301 spin_unlock_irqrestore(&host
->lock
, flags
);
6303 return IRQ_RETVAL(handled
);
6307 * sata_scr_valid - test whether SCRs are accessible
6308 * @link: ATA link to test SCR accessibility for
6310 * Test whether SCRs are accessible for @link.
6316 * 1 if SCRs are accessible, 0 otherwise.
6318 int sata_scr_valid(struct ata_link
*link
)
6320 struct ata_port
*ap
= link
->ap
;
6322 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6326 * sata_scr_read - read SCR register of the specified port
6327 * @link: ATA link to read SCR for
6329 * @val: Place to store read value
6331 * Read SCR register @reg of @link into *@val. This function is
6332 * guaranteed to succeed if @link is ap->link, the cable type of
6333 * the port is SATA and the port implements ->scr_read.
6336 * None if @link is ap->link. Kernel thread context otherwise.
6339 * 0 on success, negative errno on failure.
6341 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6343 if (ata_is_host_link(link
)) {
6344 struct ata_port
*ap
= link
->ap
;
6346 if (sata_scr_valid(link
))
6347 return ap
->ops
->scr_read(ap
, reg
, val
);
6351 return sata_pmp_scr_read(link
, reg
, val
);
6355 * sata_scr_write - write SCR register of the specified port
6356 * @link: ATA link to write SCR for
6357 * @reg: SCR to write
6358 * @val: value to write
6360 * Write @val to SCR register @reg of @link. This function is
6361 * guaranteed to succeed if @link is ap->link, the cable type of
6362 * the port is SATA and the port implements ->scr_read.
6365 * None if @link is ap->link. Kernel thread context otherwise.
6368 * 0 on success, negative errno on failure.
6370 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6372 if (ata_is_host_link(link
)) {
6373 struct ata_port
*ap
= link
->ap
;
6375 if (sata_scr_valid(link
))
6376 return ap
->ops
->scr_write(ap
, reg
, val
);
6380 return sata_pmp_scr_write(link
, reg
, val
);
6384 * sata_scr_write_flush - write SCR register of the specified port and flush
6385 * @link: ATA link to write SCR for
6386 * @reg: SCR to write
6387 * @val: value to write
6389 * This function is identical to sata_scr_write() except that this
6390 * function performs flush after writing to the register.
6393 * None if @link is ap->link. Kernel thread context otherwise.
6396 * 0 on success, negative errno on failure.
6398 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6400 if (ata_is_host_link(link
)) {
6401 struct ata_port
*ap
= link
->ap
;
6404 if (sata_scr_valid(link
)) {
6405 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6407 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6413 return sata_pmp_scr_write(link
, reg
, val
);
6417 * ata_link_online - test whether the given link is online
6418 * @link: ATA link to test
6420 * Test whether @link is online. Note that this function returns
6421 * 0 if online status of @link cannot be obtained, so
6422 * ata_link_online(link) != !ata_link_offline(link).
6428 * 1 if the port online status is available and online.
6430 int ata_link_online(struct ata_link
*link
)
6434 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6435 (sstatus
& 0xf) == 0x3)
6441 * ata_link_offline - test whether the given link is offline
6442 * @link: ATA link to test
6444 * Test whether @link is offline. Note that this function
6445 * returns 0 if offline status of @link cannot be obtained, so
6446 * ata_link_online(link) != !ata_link_offline(link).
6452 * 1 if the port offline status is available and offline.
6454 int ata_link_offline(struct ata_link
*link
)
6458 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6459 (sstatus
& 0xf) != 0x3)
6464 int ata_flush_cache(struct ata_device
*dev
)
6466 unsigned int err_mask
;
6469 if (!ata_try_flush_cache(dev
))
6472 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6473 cmd
= ATA_CMD_FLUSH_EXT
;
6475 cmd
= ATA_CMD_FLUSH
;
6477 /* This is wrong. On a failed flush we get back the LBA of the lost
6478 sector and we should (assuming it wasn't aborted as unknown) issue
6479 a further flush command to continue the writeback until it
6481 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6483 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6491 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6492 unsigned int action
, unsigned int ehi_flags
,
6495 unsigned long flags
;
6498 for (i
= 0; i
< host
->n_ports
; i
++) {
6499 struct ata_port
*ap
= host
->ports
[i
];
6500 struct ata_link
*link
;
6502 /* Previous resume operation might still be in
6503 * progress. Wait for PM_PENDING to clear.
6505 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6506 ata_port_wait_eh(ap
);
6507 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6510 /* request PM ops to EH */
6511 spin_lock_irqsave(ap
->lock
, flags
);
6516 ap
->pm_result
= &rc
;
6519 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6520 __ata_port_for_each_link(link
, ap
) {
6521 link
->eh_info
.action
|= action
;
6522 link
->eh_info
.flags
|= ehi_flags
;
6525 ata_port_schedule_eh(ap
);
6527 spin_unlock_irqrestore(ap
->lock
, flags
);
6529 /* wait and check result */
6531 ata_port_wait_eh(ap
);
6532 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6542 * ata_host_suspend - suspend host
6543 * @host: host to suspend
6546 * Suspend @host. Actual operation is performed by EH. This
6547 * function requests EH to perform PM operations and waits for EH
6551 * Kernel thread context (may sleep).
6554 * 0 on success, -errno on failure.
6556 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6561 * disable link pm on all ports before requesting
6564 ata_lpm_enable(host
);
6566 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6568 host
->dev
->power
.power_state
= mesg
;
6573 * ata_host_resume - resume host
6574 * @host: host to resume
6576 * Resume @host. Actual operation is performed by EH. This
6577 * function requests EH to perform PM operations and returns.
6578 * Note that all resume operations are performed parallely.
6581 * Kernel thread context (may sleep).
6583 void ata_host_resume(struct ata_host
*host
)
6585 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6586 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6587 host
->dev
->power
.power_state
= PMSG_ON
;
6589 /* reenable link pm */
6590 ata_lpm_disable(host
);
6595 * ata_port_start - Set port up for dma.
6596 * @ap: Port to initialize
6598 * Called just after data structures for each port are
6599 * initialized. Allocates space for PRD table.
6601 * May be used as the port_start() entry in ata_port_operations.
6604 * Inherited from caller.
6606 int ata_port_start(struct ata_port
*ap
)
6608 struct device
*dev
= ap
->dev
;
6611 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6616 rc
= ata_pad_alloc(ap
, dev
);
6620 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6621 (unsigned long long)ap
->prd_dma
);
6626 * ata_dev_init - Initialize an ata_device structure
6627 * @dev: Device structure to initialize
6629 * Initialize @dev in preparation for probing.
6632 * Inherited from caller.
6634 void ata_dev_init(struct ata_device
*dev
)
6636 struct ata_link
*link
= dev
->link
;
6637 struct ata_port
*ap
= link
->ap
;
6638 unsigned long flags
;
6640 /* SATA spd limit is bound to the first device */
6641 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6644 /* High bits of dev->flags are used to record warm plug
6645 * requests which occur asynchronously. Synchronize using
6648 spin_lock_irqsave(ap
->lock
, flags
);
6649 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6651 spin_unlock_irqrestore(ap
->lock
, flags
);
6653 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6654 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6655 dev
->pio_mask
= UINT_MAX
;
6656 dev
->mwdma_mask
= UINT_MAX
;
6657 dev
->udma_mask
= UINT_MAX
;
6661 * ata_link_init - Initialize an ata_link structure
6662 * @ap: ATA port link is attached to
6663 * @link: Link structure to initialize
6664 * @pmp: Port multiplier port number
6669 * Kernel thread context (may sleep)
6671 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6675 /* clear everything except for devices */
6676 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6680 link
->active_tag
= ATA_TAG_POISON
;
6681 link
->hw_sata_spd_limit
= UINT_MAX
;
6683 /* can't use iterator, ap isn't initialized yet */
6684 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6685 struct ata_device
*dev
= &link
->device
[i
];
6688 dev
->devno
= dev
- link
->device
;
6694 * sata_link_init_spd - Initialize link->sata_spd_limit
6695 * @link: Link to configure sata_spd_limit for
6697 * Initialize @link->[hw_]sata_spd_limit to the currently
6701 * Kernel thread context (may sleep).
6704 * 0 on success, -errno on failure.
6706 int sata_link_init_spd(struct ata_link
*link
)
6711 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6715 spd
= (scontrol
>> 4) & 0xf;
6717 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6719 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6725 * ata_port_alloc - allocate and initialize basic ATA port resources
6726 * @host: ATA host this allocated port belongs to
6728 * Allocate and initialize basic ATA port resources.
6731 * Allocate ATA port on success, NULL on failure.
6734 * Inherited from calling layer (may sleep).
6736 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6738 struct ata_port
*ap
;
6742 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6746 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6747 ap
->lock
= &host
->lock
;
6748 ap
->flags
= ATA_FLAG_DISABLED
;
6750 ap
->ctl
= ATA_DEVCTL_OBS
;
6752 ap
->dev
= host
->dev
;
6753 ap
->last_ctl
= 0xFF;
6755 #if defined(ATA_VERBOSE_DEBUG)
6756 /* turn on all debugging levels */
6757 ap
->msg_enable
= 0x00FF;
6758 #elif defined(ATA_DEBUG)
6759 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6761 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6764 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6765 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6766 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6767 INIT_LIST_HEAD(&ap
->eh_done_q
);
6768 init_waitqueue_head(&ap
->eh_wait_q
);
6769 init_timer_deferrable(&ap
->fastdrain_timer
);
6770 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6771 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6773 ap
->cbl
= ATA_CBL_NONE
;
6775 ata_link_init(ap
, &ap
->link
, 0);
6778 ap
->stats
.unhandled_irq
= 1;
6779 ap
->stats
.idle_irq
= 1;
6784 static void ata_host_release(struct device
*gendev
, void *res
)
6786 struct ata_host
*host
= dev_get_drvdata(gendev
);
6789 for (i
= 0; i
< host
->n_ports
; i
++) {
6790 struct ata_port
*ap
= host
->ports
[i
];
6796 scsi_host_put(ap
->scsi_host
);
6798 kfree(ap
->pmp_link
);
6800 host
->ports
[i
] = NULL
;
6803 dev_set_drvdata(gendev
, NULL
);
6807 * ata_host_alloc - allocate and init basic ATA host resources
6808 * @dev: generic device this host is associated with
6809 * @max_ports: maximum number of ATA ports associated with this host
6811 * Allocate and initialize basic ATA host resources. LLD calls
6812 * this function to allocate a host, initializes it fully and
6813 * attaches it using ata_host_register().
6815 * @max_ports ports are allocated and host->n_ports is
6816 * initialized to @max_ports. The caller is allowed to decrease
6817 * host->n_ports before calling ata_host_register(). The unused
6818 * ports will be automatically freed on registration.
6821 * Allocate ATA host on success, NULL on failure.
6824 * Inherited from calling layer (may sleep).
6826 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6828 struct ata_host
*host
;
6834 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6837 /* alloc a container for our list of ATA ports (buses) */
6838 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6839 /* alloc a container for our list of ATA ports (buses) */
6840 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6844 devres_add(dev
, host
);
6845 dev_set_drvdata(dev
, host
);
6847 spin_lock_init(&host
->lock
);
6849 host
->n_ports
= max_ports
;
6851 /* allocate ports bound to this host */
6852 for (i
= 0; i
< max_ports
; i
++) {
6853 struct ata_port
*ap
;
6855 ap
= ata_port_alloc(host
);
6860 host
->ports
[i
] = ap
;
6863 devres_remove_group(dev
, NULL
);
6867 devres_release_group(dev
, NULL
);
6872 * ata_host_alloc_pinfo - alloc host and init with port_info array
6873 * @dev: generic device this host is associated with
6874 * @ppi: array of ATA port_info to initialize host with
6875 * @n_ports: number of ATA ports attached to this host
6877 * Allocate ATA host and initialize with info from @ppi. If NULL
6878 * terminated, @ppi may contain fewer entries than @n_ports. The
6879 * last entry will be used for the remaining ports.
6882 * Allocate ATA host on success, NULL on failure.
6885 * Inherited from calling layer (may sleep).
6887 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6888 const struct ata_port_info
* const * ppi
,
6891 const struct ata_port_info
*pi
;
6892 struct ata_host
*host
;
6895 host
= ata_host_alloc(dev
, n_ports
);
6899 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6900 struct ata_port
*ap
= host
->ports
[i
];
6905 ap
->pio_mask
= pi
->pio_mask
;
6906 ap
->mwdma_mask
= pi
->mwdma_mask
;
6907 ap
->udma_mask
= pi
->udma_mask
;
6908 ap
->flags
|= pi
->flags
;
6909 ap
->link
.flags
|= pi
->link_flags
;
6910 ap
->ops
= pi
->port_ops
;
6912 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6913 host
->ops
= pi
->port_ops
;
6914 if (!host
->private_data
&& pi
->private_data
)
6915 host
->private_data
= pi
->private_data
;
6921 static void ata_host_stop(struct device
*gendev
, void *res
)
6923 struct ata_host
*host
= dev_get_drvdata(gendev
);
6926 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
6928 for (i
= 0; i
< host
->n_ports
; i
++) {
6929 struct ata_port
*ap
= host
->ports
[i
];
6931 if (ap
->ops
->port_stop
)
6932 ap
->ops
->port_stop(ap
);
6935 if (host
->ops
->host_stop
)
6936 host
->ops
->host_stop(host
);
6940 * ata_host_start - start and freeze ports of an ATA host
6941 * @host: ATA host to start ports for
6943 * Start and then freeze ports of @host. Started status is
6944 * recorded in host->flags, so this function can be called
6945 * multiple times. Ports are guaranteed to get started only
6946 * once. If host->ops isn't initialized yet, its set to the
6947 * first non-dummy port ops.
6950 * Inherited from calling layer (may sleep).
6953 * 0 if all ports are started successfully, -errno otherwise.
6955 int ata_host_start(struct ata_host
*host
)
6958 void *start_dr
= NULL
;
6961 if (host
->flags
& ATA_HOST_STARTED
)
6964 for (i
= 0; i
< host
->n_ports
; i
++) {
6965 struct ata_port
*ap
= host
->ports
[i
];
6967 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6968 host
->ops
= ap
->ops
;
6970 if (ap
->ops
->port_stop
)
6974 if (host
->ops
->host_stop
)
6978 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
6983 for (i
= 0; i
< host
->n_ports
; i
++) {
6984 struct ata_port
*ap
= host
->ports
[i
];
6986 if (ap
->ops
->port_start
) {
6987 rc
= ap
->ops
->port_start(ap
);
6990 dev_printk(KERN_ERR
, host
->dev
,
6991 "failed to start port %d "
6992 "(errno=%d)\n", i
, rc
);
6996 ata_eh_freeze_port(ap
);
7000 devres_add(host
->dev
, start_dr
);
7001 host
->flags
|= ATA_HOST_STARTED
;
7006 struct ata_port
*ap
= host
->ports
[i
];
7008 if (ap
->ops
->port_stop
)
7009 ap
->ops
->port_stop(ap
);
7011 devres_free(start_dr
);
7016 * ata_sas_host_init - Initialize a host struct
7017 * @host: host to initialize
7018 * @dev: device host is attached to
7019 * @flags: host flags
7023 * PCI/etc. bus probe sem.
7026 /* KILLME - the only user left is ipr */
7027 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
7028 unsigned long flags
, const struct ata_port_operations
*ops
)
7030 spin_lock_init(&host
->lock
);
7032 host
->flags
= flags
;
7037 * ata_host_register - register initialized ATA host
7038 * @host: ATA host to register
7039 * @sht: template for SCSI host
7041 * Register initialized ATA host. @host is allocated using
7042 * ata_host_alloc() and fully initialized by LLD. This function
7043 * starts ports, registers @host with ATA and SCSI layers and
7044 * probe registered devices.
7047 * Inherited from calling layer (may sleep).
7050 * 0 on success, -errno otherwise.
7052 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
7056 /* host must have been started */
7057 if (!(host
->flags
& ATA_HOST_STARTED
)) {
7058 dev_printk(KERN_ERR
, host
->dev
,
7059 "BUG: trying to register unstarted host\n");
7064 /* Blow away unused ports. This happens when LLD can't
7065 * determine the exact number of ports to allocate at
7068 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
7069 kfree(host
->ports
[i
]);
7071 /* give ports names and add SCSI hosts */
7072 for (i
= 0; i
< host
->n_ports
; i
++)
7073 host
->ports
[i
]->print_id
= ata_print_id
++;
7075 rc
= ata_scsi_add_hosts(host
, sht
);
7079 /* associate with ACPI nodes */
7080 ata_acpi_associate(host
);
7082 /* set cable, sata_spd_limit and report */
7083 for (i
= 0; i
< host
->n_ports
; i
++) {
7084 struct ata_port
*ap
= host
->ports
[i
];
7085 unsigned long xfer_mask
;
7087 /* set SATA cable type if still unset */
7088 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
7089 ap
->cbl
= ATA_CBL_SATA
;
7091 /* init sata_spd_limit to the current value */
7092 sata_link_init_spd(&ap
->link
);
7094 /* print per-port info to dmesg */
7095 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
7098 if (!ata_port_is_dummy(ap
)) {
7099 ata_port_printk(ap
, KERN_INFO
,
7100 "%cATA max %s %s\n",
7101 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
7102 ata_mode_string(xfer_mask
),
7103 ap
->link
.eh_info
.desc
);
7104 ata_ehi_clear_desc(&ap
->link
.eh_info
);
7106 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
7109 /* perform each probe synchronously */
7110 DPRINTK("probe begin\n");
7111 for (i
= 0; i
< host
->n_ports
; i
++) {
7112 struct ata_port
*ap
= host
->ports
[i
];
7116 if (ap
->ops
->error_handler
) {
7117 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
7118 unsigned long flags
;
7122 /* kick EH for boot probing */
7123 spin_lock_irqsave(ap
->lock
, flags
);
7126 (1 << ata_link_max_devices(&ap
->link
)) - 1;
7127 ehi
->action
|= ATA_EH_SOFTRESET
;
7128 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
7130 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
7131 ap
->pflags
|= ATA_PFLAG_LOADING
;
7132 ata_port_schedule_eh(ap
);
7134 spin_unlock_irqrestore(ap
->lock
, flags
);
7136 /* wait for EH to finish */
7137 ata_port_wait_eh(ap
);
7139 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
7140 rc
= ata_bus_probe(ap
);
7141 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
7144 /* FIXME: do something useful here?
7145 * Current libata behavior will
7146 * tear down everything when
7147 * the module is removed
7148 * or the h/w is unplugged.
7154 /* probes are done, now scan each port's disk(s) */
7155 DPRINTK("host probe begin\n");
7156 for (i
= 0; i
< host
->n_ports
; i
++) {
7157 struct ata_port
*ap
= host
->ports
[i
];
7159 ata_scsi_scan_host(ap
, 1);
7160 ata_lpm_schedule(ap
, ap
->pm_policy
);
7167 * ata_host_activate - start host, request IRQ and register it
7168 * @host: target ATA host
7169 * @irq: IRQ to request
7170 * @irq_handler: irq_handler used when requesting IRQ
7171 * @irq_flags: irq_flags used when requesting IRQ
7172 * @sht: scsi_host_template to use when registering the host
7174 * After allocating an ATA host and initializing it, most libata
7175 * LLDs perform three steps to activate the host - start host,
7176 * request IRQ and register it. This helper takes necessasry
7177 * arguments and performs the three steps in one go.
7179 * An invalid IRQ skips the IRQ registration and expects the host to
7180 * have set polling mode on the port. In this case, @irq_handler
7184 * Inherited from calling layer (may sleep).
7187 * 0 on success, -errno otherwise.
7189 int ata_host_activate(struct ata_host
*host
, int irq
,
7190 irq_handler_t irq_handler
, unsigned long irq_flags
,
7191 struct scsi_host_template
*sht
)
7195 rc
= ata_host_start(host
);
7199 /* Special case for polling mode */
7201 WARN_ON(irq_handler
);
7202 return ata_host_register(host
, sht
);
7205 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
7206 dev_driver_string(host
->dev
), host
);
7210 for (i
= 0; i
< host
->n_ports
; i
++)
7211 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
7213 rc
= ata_host_register(host
, sht
);
7214 /* if failed, just free the IRQ and leave ports alone */
7216 devm_free_irq(host
->dev
, irq
, host
);
7222 * ata_port_detach - Detach ATA port in prepration of device removal
7223 * @ap: ATA port to be detached
7225 * Detach all ATA devices and the associated SCSI devices of @ap;
7226 * then, remove the associated SCSI host. @ap is guaranteed to
7227 * be quiescent on return from this function.
7230 * Kernel thread context (may sleep).
7232 static void ata_port_detach(struct ata_port
*ap
)
7234 unsigned long flags
;
7235 struct ata_link
*link
;
7236 struct ata_device
*dev
;
7238 if (!ap
->ops
->error_handler
)
7241 /* tell EH we're leaving & flush EH */
7242 spin_lock_irqsave(ap
->lock
, flags
);
7243 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7244 spin_unlock_irqrestore(ap
->lock
, flags
);
7246 ata_port_wait_eh(ap
);
7248 /* EH is now guaranteed to see UNLOADING - EH context belongs
7249 * to us. Disable all existing devices.
7251 ata_port_for_each_link(link
, ap
) {
7252 ata_link_for_each_dev(dev
, link
)
7253 ata_dev_disable(dev
);
7256 /* Final freeze & EH. All in-flight commands are aborted. EH
7257 * will be skipped and retrials will be terminated with bad
7260 spin_lock_irqsave(ap
->lock
, flags
);
7261 ata_port_freeze(ap
); /* won't be thawed */
7262 spin_unlock_irqrestore(ap
->lock
, flags
);
7264 ata_port_wait_eh(ap
);
7265 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7268 /* remove the associated SCSI host */
7269 scsi_remove_host(ap
->scsi_host
);
7273 * ata_host_detach - Detach all ports of an ATA host
7274 * @host: Host to detach
7276 * Detach all ports of @host.
7279 * Kernel thread context (may sleep).
7281 void ata_host_detach(struct ata_host
*host
)
7285 for (i
= 0; i
< host
->n_ports
; i
++)
7286 ata_port_detach(host
->ports
[i
]);
7288 /* the host is dead now, dissociate ACPI */
7289 ata_acpi_dissociate(host
);
7293 * ata_std_ports - initialize ioaddr with standard port offsets.
7294 * @ioaddr: IO address structure to be initialized
7296 * Utility function which initializes data_addr, error_addr,
7297 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7298 * device_addr, status_addr, and command_addr to standard offsets
7299 * relative to cmd_addr.
7301 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7304 void ata_std_ports(struct ata_ioports
*ioaddr
)
7306 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7307 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7308 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7309 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7310 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7311 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7312 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7313 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7314 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7315 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7322 * ata_pci_remove_one - PCI layer callback for device removal
7323 * @pdev: PCI device that was removed
7325 * PCI layer indicates to libata via this hook that hot-unplug or
7326 * module unload event has occurred. Detach all ports. Resource
7327 * release is handled via devres.
7330 * Inherited from PCI layer (may sleep).
7332 void ata_pci_remove_one(struct pci_dev
*pdev
)
7334 struct device
*dev
= &pdev
->dev
;
7335 struct ata_host
*host
= dev_get_drvdata(dev
);
7337 ata_host_detach(host
);
7340 /* move to PCI subsystem */
7341 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7343 unsigned long tmp
= 0;
7345 switch (bits
->width
) {
7348 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7354 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7360 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7371 return (tmp
== bits
->val
) ? 1 : 0;
7375 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7377 pci_save_state(pdev
);
7378 pci_disable_device(pdev
);
7380 if (mesg
.event
== PM_EVENT_SUSPEND
)
7381 pci_set_power_state(pdev
, PCI_D3hot
);
7384 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7388 pci_set_power_state(pdev
, PCI_D0
);
7389 pci_restore_state(pdev
);
7391 rc
= pcim_enable_device(pdev
);
7393 dev_printk(KERN_ERR
, &pdev
->dev
,
7394 "failed to enable device after resume (%d)\n", rc
);
7398 pci_set_master(pdev
);
7402 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7404 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7407 rc
= ata_host_suspend(host
, mesg
);
7411 ata_pci_device_do_suspend(pdev
, mesg
);
7416 int ata_pci_device_resume(struct pci_dev
*pdev
)
7418 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7421 rc
= ata_pci_device_do_resume(pdev
);
7423 ata_host_resume(host
);
7426 #endif /* CONFIG_PM */
7428 #endif /* CONFIG_PCI */
7431 static int __init
ata_init(void)
7433 ata_probe_timeout
*= HZ
;
7434 ata_wq
= create_workqueue("ata");
7438 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7440 destroy_workqueue(ata_wq
);
7444 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7448 static void __exit
ata_exit(void)
7450 destroy_workqueue(ata_wq
);
7451 destroy_workqueue(ata_aux_wq
);
7454 subsys_initcall(ata_init
);
7455 module_exit(ata_exit
);
7457 static unsigned long ratelimit_time
;
7458 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7460 int ata_ratelimit(void)
7463 unsigned long flags
;
7465 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7467 if (time_after(jiffies
, ratelimit_time
)) {
7469 ratelimit_time
= jiffies
+ (HZ
/5);
7473 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7479 * ata_wait_register - wait until register value changes
7480 * @reg: IO-mapped register
7481 * @mask: Mask to apply to read register value
7482 * @val: Wait condition
7483 * @interval_msec: polling interval in milliseconds
7484 * @timeout_msec: timeout in milliseconds
7486 * Waiting for some bits of register to change is a common
7487 * operation for ATA controllers. This function reads 32bit LE
7488 * IO-mapped register @reg and tests for the following condition.
7490 * (*@reg & mask) != val
7492 * If the condition is met, it returns; otherwise, the process is
7493 * repeated after @interval_msec until timeout.
7496 * Kernel thread context (may sleep)
7499 * The final register value.
7501 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7502 unsigned long interval_msec
,
7503 unsigned long timeout_msec
)
7505 unsigned long timeout
;
7508 tmp
= ioread32(reg
);
7510 /* Calculate timeout _after_ the first read to make sure
7511 * preceding writes reach the controller before starting to
7512 * eat away the timeout.
7514 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7516 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7517 msleep(interval_msec
);
7518 tmp
= ioread32(reg
);
7527 static void ata_dummy_noret(struct ata_port
*ap
) { }
7528 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7529 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7531 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7536 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7538 return AC_ERR_SYSTEM
;
7541 const struct ata_port_operations ata_dummy_port_ops
= {
7542 .check_status
= ata_dummy_check_status
,
7543 .check_altstatus
= ata_dummy_check_status
,
7544 .dev_select
= ata_noop_dev_select
,
7545 .qc_prep
= ata_noop_qc_prep
,
7546 .qc_issue
= ata_dummy_qc_issue
,
7547 .freeze
= ata_dummy_noret
,
7548 .thaw
= ata_dummy_noret
,
7549 .error_handler
= ata_dummy_noret
,
7550 .post_internal_cmd
= ata_dummy_qc_noret
,
7551 .irq_clear
= ata_dummy_noret
,
7552 .port_start
= ata_dummy_ret0
,
7553 .port_stop
= ata_dummy_noret
,
7556 const struct ata_port_info ata_dummy_port_info
= {
7557 .port_ops
= &ata_dummy_port_ops
,
7561 * libata is essentially a library of internal helper functions for
7562 * low-level ATA host controller drivers. As such, the API/ABI is
7563 * likely to change as new drivers are added and updated.
7564 * Do not depend on ABI/API stability.
7566 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7567 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7568 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7569 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7570 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7571 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7572 EXPORT_SYMBOL_GPL(ata_std_ports
);
7573 EXPORT_SYMBOL_GPL(ata_host_init
);
7574 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7575 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7576 EXPORT_SYMBOL_GPL(ata_host_start
);
7577 EXPORT_SYMBOL_GPL(ata_host_register
);
7578 EXPORT_SYMBOL_GPL(ata_host_activate
);
7579 EXPORT_SYMBOL_GPL(ata_host_detach
);
7580 EXPORT_SYMBOL_GPL(ata_sg_init
);
7581 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7582 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7583 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7584 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7585 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7586 EXPORT_SYMBOL_GPL(ata_tf_load
);
7587 EXPORT_SYMBOL_GPL(ata_tf_read
);
7588 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7589 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7590 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7591 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7592 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7593 EXPORT_SYMBOL_GPL(ata_check_status
);
7594 EXPORT_SYMBOL_GPL(ata_altstatus
);
7595 EXPORT_SYMBOL_GPL(ata_exec_command
);
7596 EXPORT_SYMBOL_GPL(ata_port_start
);
7597 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7598 EXPORT_SYMBOL_GPL(ata_interrupt
);
7599 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7600 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7601 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7602 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7603 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7604 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7605 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7606 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7607 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7608 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7609 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7610 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7611 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7612 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7613 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7614 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7615 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7616 EXPORT_SYMBOL_GPL(ata_port_probe
);
7617 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7618 EXPORT_SYMBOL_GPL(sata_set_spd
);
7619 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7620 EXPORT_SYMBOL_GPL(sata_link_resume
);
7621 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7622 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7623 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7624 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7625 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7626 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7627 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7628 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7629 EXPORT_SYMBOL_GPL(ata_port_disable
);
7630 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7631 EXPORT_SYMBOL_GPL(ata_wait_register
);
7632 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7633 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7634 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7635 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7636 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7637 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7638 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7639 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7640 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7641 EXPORT_SYMBOL_GPL(ata_host_intr
);
7642 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7643 EXPORT_SYMBOL_GPL(sata_scr_read
);
7644 EXPORT_SYMBOL_GPL(sata_scr_write
);
7645 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7646 EXPORT_SYMBOL_GPL(ata_link_online
);
7647 EXPORT_SYMBOL_GPL(ata_link_offline
);
7649 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7650 EXPORT_SYMBOL_GPL(ata_host_resume
);
7651 #endif /* CONFIG_PM */
7652 EXPORT_SYMBOL_GPL(ata_id_string
);
7653 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7654 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7655 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7657 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7658 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7659 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7662 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7663 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7664 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7665 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7666 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7667 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7669 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7670 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7671 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7672 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7673 #endif /* CONFIG_PM */
7674 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7675 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7676 #endif /* CONFIG_PCI */
7678 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7679 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7680 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7681 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7682 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7684 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7685 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7686 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7687 EXPORT_SYMBOL_GPL(ata_port_desc
);
7689 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7690 #endif /* CONFIG_PCI */
7691 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7692 EXPORT_SYMBOL_GPL(ata_link_abort
);
7693 EXPORT_SYMBOL_GPL(ata_port_abort
);
7694 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7695 EXPORT_SYMBOL_GPL(sata_async_notification
);
7696 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7697 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7698 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7699 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7700 EXPORT_SYMBOL_GPL(ata_do_eh
);
7701 EXPORT_SYMBOL_GPL(ata_irq_on
);
7702 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7704 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7705 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7706 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7707 EXPORT_SYMBOL_GPL(ata_cable_sata
);