2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsi_host.h>
56 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
63 /* debounce timing parameters in msecs { interval, duration, timeout } */
64 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
65 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
66 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
68 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
69 u16 heads
, u16 sectors
);
70 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
71 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
72 u8 enable
, u8 feature
);
73 static void ata_dev_xfermask(struct ata_device
*dev
);
74 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
76 unsigned int ata_print_id
= 1;
77 static struct workqueue_struct
*ata_wq
;
79 struct workqueue_struct
*ata_aux_wq
;
81 int atapi_enabled
= 1;
82 module_param(atapi_enabled
, int, 0444);
83 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
86 module_param(atapi_dmadir
, int, 0444);
87 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 int atapi_passthru16
= 1;
90 module_param(atapi_passthru16
, int, 0444);
91 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
94 module_param_named(fua
, libata_fua
, int, 0444);
95 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
97 static int ata_ignore_hpa
;
98 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
99 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
101 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
102 module_param_named(dma
, libata_dma_mask
, int, 0444);
103 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
105 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
106 module_param(ata_probe_timeout
, int, 0444);
107 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
109 int libata_noacpi
= 0;
110 module_param_named(noacpi
, libata_noacpi
, int, 0444);
111 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
113 MODULE_AUTHOR("Jeff Garzik");
114 MODULE_DESCRIPTION("Library module for ATA devices");
115 MODULE_LICENSE("GPL");
116 MODULE_VERSION(DRV_VERSION
);
120 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
121 * @tf: Taskfile to convert
122 * @pmp: Port multiplier port
123 * @is_cmd: This FIS is for command
124 * @fis: Buffer into which data will output
126 * Converts a standard ATA taskfile to a Serial ATA
127 * FIS structure (Register - Host to Device).
130 * Inherited from caller.
132 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
134 fis
[0] = 0x27; /* Register - Host to Device FIS */
135 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
137 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
139 fis
[2] = tf
->command
;
140 fis
[3] = tf
->feature
;
147 fis
[8] = tf
->hob_lbal
;
148 fis
[9] = tf
->hob_lbam
;
149 fis
[10] = tf
->hob_lbah
;
150 fis
[11] = tf
->hob_feature
;
153 fis
[13] = tf
->hob_nsect
;
164 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
165 * @fis: Buffer from which data will be input
166 * @tf: Taskfile to output
168 * Converts a serial ATA FIS structure to a standard ATA taskfile.
171 * Inherited from caller.
174 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
176 tf
->command
= fis
[2]; /* status */
177 tf
->feature
= fis
[3]; /* error */
184 tf
->hob_lbal
= fis
[8];
185 tf
->hob_lbam
= fis
[9];
186 tf
->hob_lbah
= fis
[10];
189 tf
->hob_nsect
= fis
[13];
192 static const u8 ata_rw_cmds
[] = {
196 ATA_CMD_READ_MULTI_EXT
,
197 ATA_CMD_WRITE_MULTI_EXT
,
201 ATA_CMD_WRITE_MULTI_FUA_EXT
,
205 ATA_CMD_PIO_READ_EXT
,
206 ATA_CMD_PIO_WRITE_EXT
,
219 ATA_CMD_WRITE_FUA_EXT
223 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
224 * @tf: command to examine and configure
225 * @dev: device tf belongs to
227 * Examine the device configuration and tf->flags to calculate
228 * the proper read/write commands and protocol to use.
233 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
237 int index
, fua
, lba48
, write
;
239 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
240 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
241 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
243 if (dev
->flags
& ATA_DFLAG_PIO
) {
244 tf
->protocol
= ATA_PROT_PIO
;
245 index
= dev
->multi_count
? 0 : 8;
246 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
247 /* Unable to use DMA due to host limitation */
248 tf
->protocol
= ATA_PROT_PIO
;
249 index
= dev
->multi_count
? 0 : 8;
251 tf
->protocol
= ATA_PROT_DMA
;
255 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
264 * ata_tf_read_block - Read block address from ATA taskfile
265 * @tf: ATA taskfile of interest
266 * @dev: ATA device @tf belongs to
271 * Read block address from @tf. This function can handle all
272 * three address formats - LBA, LBA48 and CHS. tf->protocol and
273 * flags select the address format to use.
276 * Block address read from @tf.
278 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
282 if (tf
->flags
& ATA_TFLAG_LBA
) {
283 if (tf
->flags
& ATA_TFLAG_LBA48
) {
284 block
|= (u64
)tf
->hob_lbah
<< 40;
285 block
|= (u64
)tf
->hob_lbam
<< 32;
286 block
|= tf
->hob_lbal
<< 24;
288 block
|= (tf
->device
& 0xf) << 24;
290 block
|= tf
->lbah
<< 16;
291 block
|= tf
->lbam
<< 8;
296 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
297 head
= tf
->device
& 0xf;
300 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
307 * ata_build_rw_tf - Build ATA taskfile for given read/write request
308 * @tf: Target ATA taskfile
309 * @dev: ATA device @tf belongs to
310 * @block: Block address
311 * @n_block: Number of blocks
312 * @tf_flags: RW/FUA etc...
318 * Build ATA taskfile @tf for read/write request described by
319 * @block, @n_block, @tf_flags and @tag on @dev.
323 * 0 on success, -ERANGE if the request is too large for @dev,
324 * -EINVAL if the request is invalid.
326 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
327 u64 block
, u32 n_block
, unsigned int tf_flags
,
330 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
331 tf
->flags
|= tf_flags
;
333 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
335 if (!lba_48_ok(block
, n_block
))
338 tf
->protocol
= ATA_PROT_NCQ
;
339 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
341 if (tf
->flags
& ATA_TFLAG_WRITE
)
342 tf
->command
= ATA_CMD_FPDMA_WRITE
;
344 tf
->command
= ATA_CMD_FPDMA_READ
;
346 tf
->nsect
= tag
<< 3;
347 tf
->hob_feature
= (n_block
>> 8) & 0xff;
348 tf
->feature
= n_block
& 0xff;
350 tf
->hob_lbah
= (block
>> 40) & 0xff;
351 tf
->hob_lbam
= (block
>> 32) & 0xff;
352 tf
->hob_lbal
= (block
>> 24) & 0xff;
353 tf
->lbah
= (block
>> 16) & 0xff;
354 tf
->lbam
= (block
>> 8) & 0xff;
355 tf
->lbal
= block
& 0xff;
358 if (tf
->flags
& ATA_TFLAG_FUA
)
359 tf
->device
|= 1 << 7;
360 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
361 tf
->flags
|= ATA_TFLAG_LBA
;
363 if (lba_28_ok(block
, n_block
)) {
365 tf
->device
|= (block
>> 24) & 0xf;
366 } else if (lba_48_ok(block
, n_block
)) {
367 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
371 tf
->flags
|= ATA_TFLAG_LBA48
;
373 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
375 tf
->hob_lbah
= (block
>> 40) & 0xff;
376 tf
->hob_lbam
= (block
>> 32) & 0xff;
377 tf
->hob_lbal
= (block
>> 24) & 0xff;
379 /* request too large even for LBA48 */
382 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
385 tf
->nsect
= n_block
& 0xff;
387 tf
->lbah
= (block
>> 16) & 0xff;
388 tf
->lbam
= (block
>> 8) & 0xff;
389 tf
->lbal
= block
& 0xff;
391 tf
->device
|= ATA_LBA
;
394 u32 sect
, head
, cyl
, track
;
396 /* The request -may- be too large for CHS addressing. */
397 if (!lba_28_ok(block
, n_block
))
400 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
403 /* Convert LBA to CHS */
404 track
= (u32
)block
/ dev
->sectors
;
405 cyl
= track
/ dev
->heads
;
406 head
= track
% dev
->heads
;
407 sect
= (u32
)block
% dev
->sectors
+ 1;
409 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
410 (u32
)block
, track
, cyl
, head
, sect
);
412 /* Check whether the converted CHS can fit.
416 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
419 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
430 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
431 * @pio_mask: pio_mask
432 * @mwdma_mask: mwdma_mask
433 * @udma_mask: udma_mask
435 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
436 * unsigned int xfer_mask.
444 static unsigned int ata_pack_xfermask(unsigned int pio_mask
,
445 unsigned int mwdma_mask
,
446 unsigned int udma_mask
)
448 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
449 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
450 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
454 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
455 * @xfer_mask: xfer_mask to unpack
456 * @pio_mask: resulting pio_mask
457 * @mwdma_mask: resulting mwdma_mask
458 * @udma_mask: resulting udma_mask
460 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
461 * Any NULL distination masks will be ignored.
463 static void ata_unpack_xfermask(unsigned int xfer_mask
,
464 unsigned int *pio_mask
,
465 unsigned int *mwdma_mask
,
466 unsigned int *udma_mask
)
469 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
471 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
473 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
476 static const struct ata_xfer_ent
{
480 { ATA_SHIFT_PIO
, ATA_BITS_PIO
, XFER_PIO_0
},
481 { ATA_SHIFT_MWDMA
, ATA_BITS_MWDMA
, XFER_MW_DMA_0
},
482 { ATA_SHIFT_UDMA
, ATA_BITS_UDMA
, XFER_UDMA_0
},
487 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
488 * @xfer_mask: xfer_mask of interest
490 * Return matching XFER_* value for @xfer_mask. Only the highest
491 * bit of @xfer_mask is considered.
497 * Matching XFER_* value, 0 if no match found.
499 static u8
ata_xfer_mask2mode(unsigned int xfer_mask
)
501 int highbit
= fls(xfer_mask
) - 1;
502 const struct ata_xfer_ent
*ent
;
504 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
505 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
506 return ent
->base
+ highbit
- ent
->shift
;
511 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
512 * @xfer_mode: XFER_* of interest
514 * Return matching xfer_mask for @xfer_mode.
520 * Matching xfer_mask, 0 if no match found.
522 static unsigned int ata_xfer_mode2mask(u8 xfer_mode
)
524 const struct ata_xfer_ent
*ent
;
526 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
527 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
528 return 1 << (ent
->shift
+ xfer_mode
- ent
->base
);
533 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
534 * @xfer_mode: XFER_* of interest
536 * Return matching xfer_shift for @xfer_mode.
542 * Matching xfer_shift, -1 if no match found.
544 static int ata_xfer_mode2shift(unsigned int xfer_mode
)
546 const struct ata_xfer_ent
*ent
;
548 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
549 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
555 * ata_mode_string - convert xfer_mask to string
556 * @xfer_mask: mask of bits supported; only highest bit counts.
558 * Determine string which represents the highest speed
559 * (highest bit in @modemask).
565 * Constant C string representing highest speed listed in
566 * @mode_mask, or the constant C string "<n/a>".
568 static const char *ata_mode_string(unsigned int xfer_mask
)
570 static const char * const xfer_mode_str
[] = {
594 highbit
= fls(xfer_mask
) - 1;
595 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
596 return xfer_mode_str
[highbit
];
600 static const char *sata_spd_string(unsigned int spd
)
602 static const char * const spd_str
[] = {
607 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
609 return spd_str
[spd
- 1];
612 void ata_dev_disable(struct ata_device
*dev
)
614 if (ata_dev_enabled(dev
)) {
615 if (ata_msg_drv(dev
->link
->ap
))
616 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
617 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
623 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
625 struct ata_link
*link
= dev
->link
;
626 struct ata_port
*ap
= link
->ap
;
628 unsigned int err_mask
;
632 * disallow DIPM for drivers which haven't set
633 * ATA_FLAG_IPM. This is because when DIPM is enabled,
634 * phy ready will be set in the interrupt status on
635 * state changes, which will cause some drivers to
636 * think there are errors - additionally drivers will
637 * need to disable hot plug.
639 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
640 ap
->pm_policy
= NOT_AVAILABLE
;
645 * For DIPM, we will only enable it for the
648 * Why? Because Disks are too stupid to know that
649 * If the host rejects a request to go to SLUMBER
650 * they should retry at PARTIAL, and instead it
651 * just would give up. So, for medium_power to
652 * work at all, we need to only allow HIPM.
654 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
660 /* no restrictions on IPM transitions */
661 scontrol
&= ~(0x3 << 8);
662 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
667 if (dev
->flags
& ATA_DFLAG_DIPM
)
668 err_mask
= ata_dev_set_feature(dev
,
669 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
672 /* allow IPM to PARTIAL */
673 scontrol
&= ~(0x1 << 8);
674 scontrol
|= (0x2 << 8);
675 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
680 if (ata_dev_enabled(dev
) && (dev
->flags
& ATA_DFLAG_DIPM
))
681 err_mask
= ata_dev_set_feature(dev
,
682 SETFEATURES_SATA_DISABLE
, SATA_DIPM
);
685 case MAX_PERFORMANCE
:
686 /* disable all IPM transitions */
687 scontrol
|= (0x3 << 8);
688 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
693 if (ata_dev_enabled(dev
) && (dev
->flags
& ATA_DFLAG_DIPM
))
694 err_mask
= ata_dev_set_feature(dev
,
695 SETFEATURES_SATA_DISABLE
, SATA_DIPM
);
699 /* FIXME: handle SET FEATURES failure */
706 * ata_dev_enable_pm - enable SATA interface power management
707 * @device - device to enable ipm for
708 * @policy - the link power management policy
710 * Enable SATA Interface power management. This will enable
711 * Device Interface Power Management (DIPM) for min_power
712 * policy, and then call driver specific callbacks for
713 * enabling Host Initiated Power management.
716 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
718 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
721 struct ata_port
*ap
= dev
->link
->ap
;
723 /* set HIPM first, then DIPM */
724 if (ap
->ops
->enable_pm
)
725 rc
= ap
->ops
->enable_pm(ap
, policy
);
728 rc
= ata_dev_set_dipm(dev
, policy
);
732 ap
->pm_policy
= MAX_PERFORMANCE
;
734 ap
->pm_policy
= policy
;
735 return /* rc */; /* hopefully we can use 'rc' eventually */
739 * ata_dev_disable_pm - disable SATA interface power management
740 * @device - device to enable ipm for
742 * Disable SATA Interface power management. This will disable
743 * Device Interface Power Management (DIPM) without changing
744 * policy, call driver specific callbacks for disabling Host
745 * Initiated Power management.
750 static void ata_dev_disable_pm(struct ata_device
*dev
)
752 struct ata_port
*ap
= dev
->link
->ap
;
754 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
755 if (ap
->ops
->disable_pm
)
756 ap
->ops
->disable_pm(ap
);
759 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
761 ap
->pm_policy
= policy
;
762 ap
->link
.eh_info
.action
|= ATA_EHI_LPM
;
763 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
764 ata_port_schedule_eh(ap
);
767 static void ata_lpm_enable(struct ata_host
*host
)
769 struct ata_link
*link
;
771 struct ata_device
*dev
;
774 for (i
= 0; i
< host
->n_ports
; i
++) {
776 ata_port_for_each_link(link
, ap
) {
777 ata_link_for_each_dev(dev
, link
)
778 ata_dev_disable_pm(dev
);
783 static void ata_lpm_disable(struct ata_host
*host
)
787 for (i
= 0; i
< host
->n_ports
; i
++) {
788 struct ata_port
*ap
= host
->ports
[i
];
789 ata_lpm_schedule(ap
, ap
->pm_policy
);
795 * ata_devchk - PATA device presence detection
796 * @ap: ATA channel to examine
797 * @device: Device to examine (starting at zero)
799 * This technique was originally described in
800 * Hale Landis's ATADRVR (www.ata-atapi.com), and
801 * later found its way into the ATA/ATAPI spec.
803 * Write a pattern to the ATA shadow registers,
804 * and if a device is present, it will respond by
805 * correctly storing and echoing back the
806 * ATA shadow register contents.
812 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
814 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
817 ap
->ops
->dev_select(ap
, device
);
819 iowrite8(0x55, ioaddr
->nsect_addr
);
820 iowrite8(0xaa, ioaddr
->lbal_addr
);
822 iowrite8(0xaa, ioaddr
->nsect_addr
);
823 iowrite8(0x55, ioaddr
->lbal_addr
);
825 iowrite8(0x55, ioaddr
->nsect_addr
);
826 iowrite8(0xaa, ioaddr
->lbal_addr
);
828 nsect
= ioread8(ioaddr
->nsect_addr
);
829 lbal
= ioread8(ioaddr
->lbal_addr
);
831 if ((nsect
== 0x55) && (lbal
== 0xaa))
832 return 1; /* we found a device */
834 return 0; /* nothing found */
838 * ata_dev_classify - determine device type based on ATA-spec signature
839 * @tf: ATA taskfile register set for device to be identified
841 * Determine from taskfile register contents whether a device is
842 * ATA or ATAPI, as per "Signature and persistence" section
843 * of ATA/PI spec (volume 1, sect 5.14).
849 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
850 * %ATA_DEV_UNKNOWN the event of failure.
852 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
854 /* Apple's open source Darwin code hints that some devices only
855 * put a proper signature into the LBA mid/high registers,
856 * So, we only check those. It's sufficient for uniqueness.
858 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
859 * signatures for ATA and ATAPI devices attached on SerialATA,
860 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
861 * spec has never mentioned about using different signatures
862 * for ATA/ATAPI devices. Then, Serial ATA II: Port
863 * Multiplier specification began to use 0x69/0x96 to identify
864 * port multpliers and 0x3c/0xc3 to identify SEMB device.
865 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
866 * 0x69/0x96 shortly and described them as reserved for
869 * We follow the current spec and consider that 0x69/0x96
870 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
872 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
873 DPRINTK("found ATA device by sig\n");
877 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
878 DPRINTK("found ATAPI device by sig\n");
879 return ATA_DEV_ATAPI
;
882 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
883 DPRINTK("found PMP device by sig\n");
887 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
888 printk(KERN_INFO
"ata: SEMB device ignored\n");
889 return ATA_DEV_SEMB_UNSUP
; /* not yet */
892 DPRINTK("unknown device\n");
893 return ATA_DEV_UNKNOWN
;
897 * ata_dev_try_classify - Parse returned ATA device signature
898 * @dev: ATA device to classify (starting at zero)
899 * @present: device seems present
900 * @r_err: Value of error register on completion
902 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
903 * an ATA/ATAPI-defined set of values is placed in the ATA
904 * shadow registers, indicating the results of device detection
907 * Select the ATA device, and read the values from the ATA shadow
908 * registers. Then parse according to the Error register value,
909 * and the spec-defined values examined by ata_dev_classify().
915 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
917 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
920 struct ata_port
*ap
= dev
->link
->ap
;
921 struct ata_taskfile tf
;
925 ap
->ops
->dev_select(ap
, dev
->devno
);
927 memset(&tf
, 0, sizeof(tf
));
929 ap
->ops
->tf_read(ap
, &tf
);
934 /* see if device passed diags: if master then continue and warn later */
935 if (err
== 0 && dev
->devno
== 0)
936 /* diagnostic fail : do nothing _YET_ */
937 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
940 else if ((dev
->devno
== 0) && (err
== 0x81))
945 /* determine if device is ATA or ATAPI */
946 class = ata_dev_classify(&tf
);
948 if (class == ATA_DEV_UNKNOWN
) {
949 /* If the device failed diagnostic, it's likely to
950 * have reported incorrect device signature too.
951 * Assume ATA device if the device seems present but
952 * device signature is invalid with diagnostic
955 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
958 class = ATA_DEV_NONE
;
959 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
960 class = ATA_DEV_NONE
;
966 * ata_id_string - Convert IDENTIFY DEVICE page into string
967 * @id: IDENTIFY DEVICE results we will examine
968 * @s: string into which data is output
969 * @ofs: offset into identify device page
970 * @len: length of string to return. must be an even number.
972 * The strings in the IDENTIFY DEVICE page are broken up into
973 * 16-bit chunks. Run through the string, and output each
974 * 8-bit chunk linearly, regardless of platform.
980 void ata_id_string(const u16
*id
, unsigned char *s
,
981 unsigned int ofs
, unsigned int len
)
1000 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1001 * @id: IDENTIFY DEVICE results we will examine
1002 * @s: string into which data is output
1003 * @ofs: offset into identify device page
1004 * @len: length of string to return. must be an odd number.
1006 * This function is identical to ata_id_string except that it
1007 * trims trailing spaces and terminates the resulting string with
1008 * null. @len must be actual maximum length (even number) + 1.
1013 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1014 unsigned int ofs
, unsigned int len
)
1018 WARN_ON(!(len
& 1));
1020 ata_id_string(id
, s
, ofs
, len
- 1);
1022 p
= s
+ strnlen(s
, len
- 1);
1023 while (p
> s
&& p
[-1] == ' ')
1028 static u64
ata_id_n_sectors(const u16
*id
)
1030 if (ata_id_has_lba(id
)) {
1031 if (ata_id_has_lba48(id
))
1032 return ata_id_u64(id
, 100);
1034 return ata_id_u32(id
, 60);
1036 if (ata_id_current_chs_valid(id
))
1037 return ata_id_u32(id
, 57);
1039 return id
[1] * id
[3] * id
[6];
1043 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
1047 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1048 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1049 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1050 sectors
|= (tf
->lbah
& 0xff) << 16;
1051 sectors
|= (tf
->lbam
& 0xff) << 8;
1052 sectors
|= (tf
->lbal
& 0xff);
1057 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
1061 sectors
|= (tf
->device
& 0x0f) << 24;
1062 sectors
|= (tf
->lbah
& 0xff) << 16;
1063 sectors
|= (tf
->lbam
& 0xff) << 8;
1064 sectors
|= (tf
->lbal
& 0xff);
1070 * ata_read_native_max_address - Read native max address
1071 * @dev: target device
1072 * @max_sectors: out parameter for the result native max address
1074 * Perform an LBA48 or LBA28 native size query upon the device in
1078 * 0 on success, -EACCES if command is aborted by the drive.
1079 * -EIO on other errors.
1081 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1083 unsigned int err_mask
;
1084 struct ata_taskfile tf
;
1085 int lba48
= ata_id_has_lba48(dev
->id
);
1087 ata_tf_init(dev
, &tf
);
1089 /* always clear all address registers */
1090 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1093 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1094 tf
.flags
|= ATA_TFLAG_LBA48
;
1096 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1098 tf
.protocol
|= ATA_PROT_NODATA
;
1099 tf
.device
|= ATA_LBA
;
1101 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1103 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1104 "max address (err_mask=0x%x)\n", err_mask
);
1105 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1111 *max_sectors
= ata_tf_to_lba48(&tf
);
1113 *max_sectors
= ata_tf_to_lba(&tf
);
1114 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1120 * ata_set_max_sectors - Set max sectors
1121 * @dev: target device
1122 * @new_sectors: new max sectors value to set for the device
1124 * Set max sectors of @dev to @new_sectors.
1127 * 0 on success, -EACCES if command is aborted or denied (due to
1128 * previous non-volatile SET_MAX) by the drive. -EIO on other
1131 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1133 unsigned int err_mask
;
1134 struct ata_taskfile tf
;
1135 int lba48
= ata_id_has_lba48(dev
->id
);
1139 ata_tf_init(dev
, &tf
);
1141 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1144 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1145 tf
.flags
|= ATA_TFLAG_LBA48
;
1147 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1148 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1149 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1151 tf
.command
= ATA_CMD_SET_MAX
;
1153 tf
.device
|= (new_sectors
>> 24) & 0xf;
1156 tf
.protocol
|= ATA_PROT_NODATA
;
1157 tf
.device
|= ATA_LBA
;
1159 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1160 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1161 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1163 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1165 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1166 "max address (err_mask=0x%x)\n", err_mask
);
1167 if (err_mask
== AC_ERR_DEV
&&
1168 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1177 * ata_hpa_resize - Resize a device with an HPA set
1178 * @dev: Device to resize
1180 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1181 * it if required to the full size of the media. The caller must check
1182 * the drive has the HPA feature set enabled.
1185 * 0 on success, -errno on failure.
1187 static int ata_hpa_resize(struct ata_device
*dev
)
1189 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1190 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1191 u64 sectors
= ata_id_n_sectors(dev
->id
);
1195 /* do we need to do it? */
1196 if (dev
->class != ATA_DEV_ATA
||
1197 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1198 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1201 /* read native max address */
1202 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1204 /* If HPA isn't going to be unlocked, skip HPA
1205 * resizing from the next try.
1207 if (!ata_ignore_hpa
) {
1208 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1209 "broken, will skip HPA handling\n");
1210 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1212 /* we can continue if device aborted the command */
1220 /* nothing to do? */
1221 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1222 if (!print_info
|| native_sectors
== sectors
)
1225 if (native_sectors
> sectors
)
1226 ata_dev_printk(dev
, KERN_INFO
,
1227 "HPA detected: current %llu, native %llu\n",
1228 (unsigned long long)sectors
,
1229 (unsigned long long)native_sectors
);
1230 else if (native_sectors
< sectors
)
1231 ata_dev_printk(dev
, KERN_WARNING
,
1232 "native sectors (%llu) is smaller than "
1234 (unsigned long long)native_sectors
,
1235 (unsigned long long)sectors
);
1239 /* let's unlock HPA */
1240 rc
= ata_set_max_sectors(dev
, native_sectors
);
1241 if (rc
== -EACCES
) {
1242 /* if device aborted the command, skip HPA resizing */
1243 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1244 "(%llu -> %llu), skipping HPA handling\n",
1245 (unsigned long long)sectors
,
1246 (unsigned long long)native_sectors
);
1247 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1252 /* re-read IDENTIFY data */
1253 rc
= ata_dev_reread_id(dev
, 0);
1255 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1256 "data after HPA resizing\n");
1261 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1262 ata_dev_printk(dev
, KERN_INFO
,
1263 "HPA unlocked: %llu -> %llu, native %llu\n",
1264 (unsigned long long)sectors
,
1265 (unsigned long long)new_sectors
,
1266 (unsigned long long)native_sectors
);
1273 * ata_id_to_dma_mode - Identify DMA mode from id block
1274 * @dev: device to identify
1275 * @unknown: mode to assume if we cannot tell
1277 * Set up the timing values for the device based upon the identify
1278 * reported values for the DMA mode. This function is used by drivers
1279 * which rely upon firmware configured modes, but wish to report the
1280 * mode correctly when possible.
1282 * In addition we emit similarly formatted messages to the default
1283 * ata_dev_set_mode handler, in order to provide consistency of
1287 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1292 /* Pack the DMA modes */
1293 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1294 if (dev
->id
[53] & 0x04)
1295 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1297 /* Select the mode in use */
1298 mode
= ata_xfer_mask2mode(mask
);
1301 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1302 ata_mode_string(mask
));
1304 /* SWDMA perhaps ? */
1306 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1309 /* Configure the device reporting */
1310 dev
->xfer_mode
= mode
;
1311 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1315 * ata_noop_dev_select - Select device 0/1 on ATA bus
1316 * @ap: ATA channel to manipulate
1317 * @device: ATA device (numbered from zero) to select
1319 * This function performs no actual function.
1321 * May be used as the dev_select() entry in ata_port_operations.
1326 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1332 * ata_std_dev_select - Select device 0/1 on ATA bus
1333 * @ap: ATA channel to manipulate
1334 * @device: ATA device (numbered from zero) to select
1336 * Use the method defined in the ATA specification to
1337 * make either device 0, or device 1, active on the
1338 * ATA channel. Works with both PIO and MMIO.
1340 * May be used as the dev_select() entry in ata_port_operations.
1346 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1351 tmp
= ATA_DEVICE_OBS
;
1353 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1355 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1356 ata_pause(ap
); /* needed; also flushes, for mmio */
1360 * ata_dev_select - Select device 0/1 on ATA bus
1361 * @ap: ATA channel to manipulate
1362 * @device: ATA device (numbered from zero) to select
1363 * @wait: non-zero to wait for Status register BSY bit to clear
1364 * @can_sleep: non-zero if context allows sleeping
1366 * Use the method defined in the ATA specification to
1367 * make either device 0, or device 1, active on the
1370 * This is a high-level version of ata_std_dev_select(),
1371 * which additionally provides the services of inserting
1372 * the proper pauses and status polling, where needed.
1378 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1379 unsigned int wait
, unsigned int can_sleep
)
1381 if (ata_msg_probe(ap
))
1382 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1383 "device %u, wait %u\n", device
, wait
);
1388 ap
->ops
->dev_select(ap
, device
);
1391 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1398 * ata_dump_id - IDENTIFY DEVICE info debugging output
1399 * @id: IDENTIFY DEVICE page to dump
1401 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1408 static inline void ata_dump_id(const u16
*id
)
1410 DPRINTK("49==0x%04x "
1420 DPRINTK("80==0x%04x "
1430 DPRINTK("88==0x%04x "
1437 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1438 * @id: IDENTIFY data to compute xfer mask from
1440 * Compute the xfermask for this device. This is not as trivial
1441 * as it seems if we must consider early devices correctly.
1443 * FIXME: pre IDE drive timing (do we care ?).
1451 static unsigned int ata_id_xfermask(const u16
*id
)
1453 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1455 /* Usual case. Word 53 indicates word 64 is valid */
1456 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1457 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1461 /* If word 64 isn't valid then Word 51 high byte holds
1462 * the PIO timing number for the maximum. Turn it into
1465 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1466 if (mode
< 5) /* Valid PIO range */
1467 pio_mask
= (2 << mode
) - 1;
1471 /* But wait.. there's more. Design your standards by
1472 * committee and you too can get a free iordy field to
1473 * process. However its the speeds not the modes that
1474 * are supported... Note drivers using the timing API
1475 * will get this right anyway
1479 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1481 if (ata_id_is_cfa(id
)) {
1483 * Process compact flash extended modes
1485 int pio
= id
[163] & 0x7;
1486 int dma
= (id
[163] >> 3) & 7;
1489 pio_mask
|= (1 << 5);
1491 pio_mask
|= (1 << 6);
1493 mwdma_mask
|= (1 << 3);
1495 mwdma_mask
|= (1 << 4);
1499 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1500 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1502 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1506 * ata_port_queue_task - Queue port_task
1507 * @ap: The ata_port to queue port_task for
1508 * @fn: workqueue function to be scheduled
1509 * @data: data for @fn to use
1510 * @delay: delay time for workqueue function
1512 * Schedule @fn(@data) for execution after @delay jiffies using
1513 * port_task. There is one port_task per port and it's the
1514 * user(low level driver)'s responsibility to make sure that only
1515 * one task is active at any given time.
1517 * libata core layer takes care of synchronization between
1518 * port_task and EH. ata_port_queue_task() may be ignored for EH
1522 * Inherited from caller.
1524 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1525 unsigned long delay
)
1527 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1528 ap
->port_task_data
= data
;
1530 /* may fail if ata_port_flush_task() in progress */
1531 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1535 * ata_port_flush_task - Flush port_task
1536 * @ap: The ata_port to flush port_task for
1538 * After this function completes, port_task is guranteed not to
1539 * be running or scheduled.
1542 * Kernel thread context (may sleep)
1544 void ata_port_flush_task(struct ata_port
*ap
)
1548 cancel_rearming_delayed_work(&ap
->port_task
);
1550 if (ata_msg_ctl(ap
))
1551 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1554 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1556 struct completion
*waiting
= qc
->private_data
;
1562 * ata_exec_internal_sg - execute libata internal command
1563 * @dev: Device to which the command is sent
1564 * @tf: Taskfile registers for the command and the result
1565 * @cdb: CDB for packet command
1566 * @dma_dir: Data tranfer direction of the command
1567 * @sgl: sg list for the data buffer of the command
1568 * @n_elem: Number of sg entries
1569 * @timeout: Timeout in msecs (0 for default)
1571 * Executes libata internal command with timeout. @tf contains
1572 * command on entry and result on return. Timeout and error
1573 * conditions are reported via return value. No recovery action
1574 * is taken after a command times out. It's caller's duty to
1575 * clean up after timeout.
1578 * None. Should be called with kernel context, might sleep.
1581 * Zero on success, AC_ERR_* mask on failure
1583 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1584 struct ata_taskfile
*tf
, const u8
*cdb
,
1585 int dma_dir
, struct scatterlist
*sgl
,
1586 unsigned int n_elem
, unsigned long timeout
)
1588 struct ata_link
*link
= dev
->link
;
1589 struct ata_port
*ap
= link
->ap
;
1590 u8 command
= tf
->command
;
1591 struct ata_queued_cmd
*qc
;
1592 unsigned int tag
, preempted_tag
;
1593 u32 preempted_sactive
, preempted_qc_active
;
1594 int preempted_nr_active_links
;
1595 DECLARE_COMPLETION_ONSTACK(wait
);
1596 unsigned long flags
;
1597 unsigned int err_mask
;
1600 spin_lock_irqsave(ap
->lock
, flags
);
1602 /* no internal command while frozen */
1603 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1604 spin_unlock_irqrestore(ap
->lock
, flags
);
1605 return AC_ERR_SYSTEM
;
1608 /* initialize internal qc */
1610 /* XXX: Tag 0 is used for drivers with legacy EH as some
1611 * drivers choke if any other tag is given. This breaks
1612 * ata_tag_internal() test for those drivers. Don't use new
1613 * EH stuff without converting to it.
1615 if (ap
->ops
->error_handler
)
1616 tag
= ATA_TAG_INTERNAL
;
1620 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1622 qc
= __ata_qc_from_tag(ap
, tag
);
1630 preempted_tag
= link
->active_tag
;
1631 preempted_sactive
= link
->sactive
;
1632 preempted_qc_active
= ap
->qc_active
;
1633 preempted_nr_active_links
= ap
->nr_active_links
;
1634 link
->active_tag
= ATA_TAG_POISON
;
1637 ap
->nr_active_links
= 0;
1639 /* prepare & issue qc */
1642 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1643 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1644 qc
->dma_dir
= dma_dir
;
1645 if (dma_dir
!= DMA_NONE
) {
1646 unsigned int i
, buflen
= 0;
1647 struct scatterlist
*sg
;
1649 for_each_sg(sgl
, sg
, n_elem
, i
)
1650 buflen
+= sg
->length
;
1652 ata_sg_init(qc
, sgl
, n_elem
);
1653 qc
->nbytes
= buflen
;
1656 qc
->private_data
= &wait
;
1657 qc
->complete_fn
= ata_qc_complete_internal
;
1661 spin_unlock_irqrestore(ap
->lock
, flags
);
1664 timeout
= ata_probe_timeout
* 1000 / HZ
;
1666 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1668 ata_port_flush_task(ap
);
1671 spin_lock_irqsave(ap
->lock
, flags
);
1673 /* We're racing with irq here. If we lose, the
1674 * following test prevents us from completing the qc
1675 * twice. If we win, the port is frozen and will be
1676 * cleaned up by ->post_internal_cmd().
1678 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1679 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1681 if (ap
->ops
->error_handler
)
1682 ata_port_freeze(ap
);
1684 ata_qc_complete(qc
);
1686 if (ata_msg_warn(ap
))
1687 ata_dev_printk(dev
, KERN_WARNING
,
1688 "qc timeout (cmd 0x%x)\n", command
);
1691 spin_unlock_irqrestore(ap
->lock
, flags
);
1694 /* do post_internal_cmd */
1695 if (ap
->ops
->post_internal_cmd
)
1696 ap
->ops
->post_internal_cmd(qc
);
1698 /* perform minimal error analysis */
1699 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1700 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1701 qc
->err_mask
|= AC_ERR_DEV
;
1704 qc
->err_mask
|= AC_ERR_OTHER
;
1706 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1707 qc
->err_mask
&= ~AC_ERR_OTHER
;
1711 spin_lock_irqsave(ap
->lock
, flags
);
1713 *tf
= qc
->result_tf
;
1714 err_mask
= qc
->err_mask
;
1717 link
->active_tag
= preempted_tag
;
1718 link
->sactive
= preempted_sactive
;
1719 ap
->qc_active
= preempted_qc_active
;
1720 ap
->nr_active_links
= preempted_nr_active_links
;
1722 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1723 * Until those drivers are fixed, we detect the condition
1724 * here, fail the command with AC_ERR_SYSTEM and reenable the
1727 * Note that this doesn't change any behavior as internal
1728 * command failure results in disabling the device in the
1729 * higher layer for LLDDs without new reset/EH callbacks.
1731 * Kill the following code as soon as those drivers are fixed.
1733 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1734 err_mask
|= AC_ERR_SYSTEM
;
1738 spin_unlock_irqrestore(ap
->lock
, flags
);
1744 * ata_exec_internal - execute libata internal command
1745 * @dev: Device to which the command is sent
1746 * @tf: Taskfile registers for the command and the result
1747 * @cdb: CDB for packet command
1748 * @dma_dir: Data tranfer direction of the command
1749 * @buf: Data buffer of the command
1750 * @buflen: Length of data buffer
1751 * @timeout: Timeout in msecs (0 for default)
1753 * Wrapper around ata_exec_internal_sg() which takes simple
1754 * buffer instead of sg list.
1757 * None. Should be called with kernel context, might sleep.
1760 * Zero on success, AC_ERR_* mask on failure
1762 unsigned ata_exec_internal(struct ata_device
*dev
,
1763 struct ata_taskfile
*tf
, const u8
*cdb
,
1764 int dma_dir
, void *buf
, unsigned int buflen
,
1765 unsigned long timeout
)
1767 struct scatterlist
*psg
= NULL
, sg
;
1768 unsigned int n_elem
= 0;
1770 if (dma_dir
!= DMA_NONE
) {
1772 sg_init_one(&sg
, buf
, buflen
);
1777 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1782 * ata_do_simple_cmd - execute simple internal command
1783 * @dev: Device to which the command is sent
1784 * @cmd: Opcode to execute
1786 * Execute a 'simple' command, that only consists of the opcode
1787 * 'cmd' itself, without filling any other registers
1790 * Kernel thread context (may sleep).
1793 * Zero on success, AC_ERR_* mask on failure
1795 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1797 struct ata_taskfile tf
;
1799 ata_tf_init(dev
, &tf
);
1802 tf
.flags
|= ATA_TFLAG_DEVICE
;
1803 tf
.protocol
= ATA_PROT_NODATA
;
1805 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1809 * ata_pio_need_iordy - check if iordy needed
1812 * Check if the current speed of the device requires IORDY. Used
1813 * by various controllers for chip configuration.
1816 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1818 /* Controller doesn't support IORDY. Probably a pointless check
1819 as the caller should know this */
1820 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1822 /* PIO3 and higher it is mandatory */
1823 if (adev
->pio_mode
> XFER_PIO_2
)
1825 /* We turn it on when possible */
1826 if (ata_id_has_iordy(adev
->id
))
1832 * ata_pio_mask_no_iordy - Return the non IORDY mask
1835 * Compute the highest mode possible if we are not using iordy. Return
1836 * -1 if no iordy mode is available.
1839 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1841 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1842 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1843 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1844 /* Is the speed faster than the drive allows non IORDY ? */
1846 /* This is cycle times not frequency - watch the logic! */
1847 if (pio
> 240) /* PIO2 is 240nS per cycle */
1848 return 3 << ATA_SHIFT_PIO
;
1849 return 7 << ATA_SHIFT_PIO
;
1852 return 3 << ATA_SHIFT_PIO
;
1856 * ata_dev_read_id - Read ID data from the specified device
1857 * @dev: target device
1858 * @p_class: pointer to class of the target device (may be changed)
1859 * @flags: ATA_READID_* flags
1860 * @id: buffer to read IDENTIFY data into
1862 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1863 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1864 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1865 * for pre-ATA4 drives.
1867 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1868 * now we abort if we hit that case.
1871 * Kernel thread context (may sleep)
1874 * 0 on success, -errno otherwise.
1876 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1877 unsigned int flags
, u16
*id
)
1879 struct ata_port
*ap
= dev
->link
->ap
;
1880 unsigned int class = *p_class
;
1881 struct ata_taskfile tf
;
1882 unsigned int err_mask
= 0;
1884 int may_fallback
= 1, tried_spinup
= 0;
1887 if (ata_msg_ctl(ap
))
1888 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1890 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1892 ata_tf_init(dev
, &tf
);
1896 tf
.command
= ATA_CMD_ID_ATA
;
1899 tf
.command
= ATA_CMD_ID_ATAPI
;
1903 reason
= "unsupported class";
1907 tf
.protocol
= ATA_PROT_PIO
;
1909 /* Some devices choke if TF registers contain garbage. Make
1910 * sure those are properly initialized.
1912 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1914 /* Device presence detection is unreliable on some
1915 * controllers. Always poll IDENTIFY if available.
1917 tf
.flags
|= ATA_TFLAG_POLLING
;
1919 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1920 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1922 if (err_mask
& AC_ERR_NODEV_HINT
) {
1923 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1924 ap
->print_id
, dev
->devno
);
1928 /* Device or controller might have reported the wrong
1929 * device class. Give a shot at the other IDENTIFY if
1930 * the current one is aborted by the device.
1933 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1936 if (class == ATA_DEV_ATA
)
1937 class = ATA_DEV_ATAPI
;
1939 class = ATA_DEV_ATA
;
1944 reason
= "I/O error";
1948 /* Falling back doesn't make sense if ID data was read
1949 * successfully at least once.
1953 swap_buf_le16(id
, ATA_ID_WORDS
);
1957 reason
= "device reports invalid type";
1959 if (class == ATA_DEV_ATA
) {
1960 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1963 if (ata_id_is_ata(id
))
1967 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1970 * Drive powered-up in standby mode, and requires a specific
1971 * SET_FEATURES spin-up subcommand before it will accept
1972 * anything other than the original IDENTIFY command.
1974 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1975 if (err_mask
&& id
[2] != 0x738c) {
1977 reason
= "SPINUP failed";
1981 * If the drive initially returned incomplete IDENTIFY info,
1982 * we now must reissue the IDENTIFY command.
1984 if (id
[2] == 0x37c8)
1988 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1990 * The exact sequence expected by certain pre-ATA4 drives is:
1992 * IDENTIFY (optional in early ATA)
1993 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1995 * Some drives were very specific about that exact sequence.
1997 * Note that ATA4 says lba is mandatory so the second check
1998 * shoud never trigger.
2000 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2001 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2004 reason
= "INIT_DEV_PARAMS failed";
2008 /* current CHS translation info (id[53-58]) might be
2009 * changed. reread the identify device info.
2011 flags
&= ~ATA_READID_POSTRESET
;
2021 if (ata_msg_warn(ap
))
2022 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2023 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2027 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2029 struct ata_port
*ap
= dev
->link
->ap
;
2030 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2033 static void ata_dev_config_ncq(struct ata_device
*dev
,
2034 char *desc
, size_t desc_sz
)
2036 struct ata_port
*ap
= dev
->link
->ap
;
2037 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2039 if (!ata_id_has_ncq(dev
->id
)) {
2043 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2044 snprintf(desc
, desc_sz
, "NCQ (not used)");
2047 if (ap
->flags
& ATA_FLAG_NCQ
) {
2048 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2049 dev
->flags
|= ATA_DFLAG_NCQ
;
2052 if (hdepth
>= ddepth
)
2053 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2055 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2059 * ata_dev_configure - Configure the specified ATA/ATAPI device
2060 * @dev: Target device to configure
2062 * Configure @dev according to @dev->id. Generic and low-level
2063 * driver specific fixups are also applied.
2066 * Kernel thread context (may sleep)
2069 * 0 on success, -errno otherwise
2071 int ata_dev_configure(struct ata_device
*dev
)
2073 struct ata_port
*ap
= dev
->link
->ap
;
2074 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2075 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2076 const u16
*id
= dev
->id
;
2077 unsigned int xfer_mask
;
2078 char revbuf
[7]; /* XYZ-99\0 */
2079 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2080 char modelbuf
[ATA_ID_PROD_LEN
+1];
2083 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2084 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2089 if (ata_msg_probe(ap
))
2090 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
2093 dev
->horkage
|= ata_dev_blacklisted(dev
);
2095 /* let ACPI work its magic */
2096 rc
= ata_acpi_on_devcfg(dev
);
2100 /* massage HPA, do it early as it might change IDENTIFY data */
2101 rc
= ata_hpa_resize(dev
);
2105 /* print device capabilities */
2106 if (ata_msg_probe(ap
))
2107 ata_dev_printk(dev
, KERN_DEBUG
,
2108 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2109 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2111 id
[49], id
[82], id
[83], id
[84],
2112 id
[85], id
[86], id
[87], id
[88]);
2114 /* initialize to-be-configured parameters */
2115 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2116 dev
->max_sectors
= 0;
2124 * common ATA, ATAPI feature tests
2127 /* find max transfer mode; for printk only */
2128 xfer_mask
= ata_id_xfermask(id
);
2130 if (ata_msg_probe(ap
))
2133 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2134 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2137 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2140 /* ATA-specific feature tests */
2141 if (dev
->class == ATA_DEV_ATA
) {
2142 if (ata_id_is_cfa(id
)) {
2143 if (id
[162] & 1) /* CPRM may make this media unusable */
2144 ata_dev_printk(dev
, KERN_WARNING
,
2145 "supports DRM functions and may "
2146 "not be fully accessable.\n");
2147 snprintf(revbuf
, 7, "CFA");
2149 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2151 dev
->n_sectors
= ata_id_n_sectors(id
);
2153 if (dev
->id
[59] & 0x100)
2154 dev
->multi_count
= dev
->id
[59] & 0xff;
2156 if (ata_id_has_lba(id
)) {
2157 const char *lba_desc
;
2161 dev
->flags
|= ATA_DFLAG_LBA
;
2162 if (ata_id_has_lba48(id
)) {
2163 dev
->flags
|= ATA_DFLAG_LBA48
;
2166 if (dev
->n_sectors
>= (1UL << 28) &&
2167 ata_id_has_flush_ext(id
))
2168 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2172 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2174 /* print device info to dmesg */
2175 if (ata_msg_drv(ap
) && print_info
) {
2176 ata_dev_printk(dev
, KERN_INFO
,
2177 "%s: %s, %s, max %s\n",
2178 revbuf
, modelbuf
, fwrevbuf
,
2179 ata_mode_string(xfer_mask
));
2180 ata_dev_printk(dev
, KERN_INFO
,
2181 "%Lu sectors, multi %u: %s %s\n",
2182 (unsigned long long)dev
->n_sectors
,
2183 dev
->multi_count
, lba_desc
, ncq_desc
);
2188 /* Default translation */
2189 dev
->cylinders
= id
[1];
2191 dev
->sectors
= id
[6];
2193 if (ata_id_current_chs_valid(id
)) {
2194 /* Current CHS translation is valid. */
2195 dev
->cylinders
= id
[54];
2196 dev
->heads
= id
[55];
2197 dev
->sectors
= id
[56];
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, CHS %u/%u/%u\n",
2208 (unsigned long long)dev
->n_sectors
,
2209 dev
->multi_count
, dev
->cylinders
,
2210 dev
->heads
, dev
->sectors
);
2217 /* ATAPI-specific feature tests */
2218 else if (dev
->class == ATA_DEV_ATAPI
) {
2219 const char *cdb_intr_string
= "";
2220 const char *atapi_an_string
= "";
2223 rc
= atapi_cdb_len(id
);
2224 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2225 if (ata_msg_warn(ap
))
2226 ata_dev_printk(dev
, KERN_WARNING
,
2227 "unsupported CDB len\n");
2231 dev
->cdb_len
= (unsigned int) rc
;
2233 /* Enable ATAPI AN if both the host and device have
2234 * the support. If PMP is attached, SNTF is required
2235 * to enable ATAPI AN to discern between PHY status
2236 * changed notifications and ATAPI ANs.
2238 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2239 (!ap
->nr_pmp_links
||
2240 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2241 unsigned int err_mask
;
2243 /* issue SET feature command to turn this on */
2244 err_mask
= ata_dev_set_feature(dev
,
2245 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2247 ata_dev_printk(dev
, KERN_ERR
,
2248 "failed to enable ATAPI AN "
2249 "(err_mask=0x%x)\n", err_mask
);
2251 dev
->flags
|= ATA_DFLAG_AN
;
2252 atapi_an_string
= ", ATAPI AN";
2256 if (ata_id_cdb_intr(dev
->id
)) {
2257 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2258 cdb_intr_string
= ", CDB intr";
2261 /* print device info to dmesg */
2262 if (ata_msg_drv(ap
) && print_info
)
2263 ata_dev_printk(dev
, KERN_INFO
,
2264 "ATAPI: %s, %s, max %s%s%s\n",
2266 ata_mode_string(xfer_mask
),
2267 cdb_intr_string
, atapi_an_string
);
2270 /* determine max_sectors */
2271 dev
->max_sectors
= ATA_MAX_SECTORS
;
2272 if (dev
->flags
& ATA_DFLAG_LBA48
)
2273 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2275 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2276 if (ata_id_has_hipm(dev
->id
))
2277 dev
->flags
|= ATA_DFLAG_HIPM
;
2278 if (ata_id_has_dipm(dev
->id
))
2279 dev
->flags
|= ATA_DFLAG_DIPM
;
2282 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2283 /* Let the user know. We don't want to disallow opens for
2284 rescue purposes, or in case the vendor is just a blithering
2287 ata_dev_printk(dev
, KERN_WARNING
,
2288 "Drive reports diagnostics failure. This may indicate a drive\n");
2289 ata_dev_printk(dev
, KERN_WARNING
,
2290 "fault or invalid emulation. Contact drive vendor for information.\n");
2294 /* limit bridge transfers to udma5, 200 sectors */
2295 if (ata_dev_knobble(dev
)) {
2296 if (ata_msg_drv(ap
) && print_info
)
2297 ata_dev_printk(dev
, KERN_INFO
,
2298 "applying bridge limits\n");
2299 dev
->udma_mask
&= ATA_UDMA5
;
2300 dev
->max_sectors
= ATA_MAX_SECTORS
;
2303 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2304 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2307 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2308 dev
->horkage
|= ATA_HORKAGE_IPM
;
2310 /* reset link pm_policy for this port to no pm */
2311 ap
->pm_policy
= MAX_PERFORMANCE
;
2314 if (ap
->ops
->dev_config
)
2315 ap
->ops
->dev_config(dev
);
2317 if (ata_msg_probe(ap
))
2318 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2319 __FUNCTION__
, ata_chk_status(ap
));
2323 if (ata_msg_probe(ap
))
2324 ata_dev_printk(dev
, KERN_DEBUG
,
2325 "%s: EXIT, err\n", __FUNCTION__
);
2330 * ata_cable_40wire - return 40 wire cable type
2333 * Helper method for drivers which want to hardwire 40 wire cable
2337 int ata_cable_40wire(struct ata_port
*ap
)
2339 return ATA_CBL_PATA40
;
2343 * ata_cable_80wire - return 80 wire cable type
2346 * Helper method for drivers which want to hardwire 80 wire cable
2350 int ata_cable_80wire(struct ata_port
*ap
)
2352 return ATA_CBL_PATA80
;
2356 * ata_cable_unknown - return unknown PATA cable.
2359 * Helper method for drivers which have no PATA cable detection.
2362 int ata_cable_unknown(struct ata_port
*ap
)
2364 return ATA_CBL_PATA_UNK
;
2368 * ata_cable_sata - return SATA cable type
2371 * Helper method for drivers which have SATA cables
2374 int ata_cable_sata(struct ata_port
*ap
)
2376 return ATA_CBL_SATA
;
2380 * ata_bus_probe - Reset and probe ATA bus
2383 * Master ATA bus probing function. Initiates a hardware-dependent
2384 * bus reset, then attempts to identify any devices found on
2388 * PCI/etc. bus probe sem.
2391 * Zero on success, negative errno otherwise.
2394 int ata_bus_probe(struct ata_port
*ap
)
2396 unsigned int classes
[ATA_MAX_DEVICES
];
2397 int tries
[ATA_MAX_DEVICES
];
2399 struct ata_device
*dev
;
2403 ata_link_for_each_dev(dev
, &ap
->link
)
2404 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2407 ata_link_for_each_dev(dev
, &ap
->link
) {
2408 /* If we issue an SRST then an ATA drive (not ATAPI)
2409 * may change configuration and be in PIO0 timing. If
2410 * we do a hard reset (or are coming from power on)
2411 * this is true for ATA or ATAPI. Until we've set a
2412 * suitable controller mode we should not touch the
2413 * bus as we may be talking too fast.
2415 dev
->pio_mode
= XFER_PIO_0
;
2417 /* If the controller has a pio mode setup function
2418 * then use it to set the chipset to rights. Don't
2419 * touch the DMA setup as that will be dealt with when
2420 * configuring devices.
2422 if (ap
->ops
->set_piomode
)
2423 ap
->ops
->set_piomode(ap
, dev
);
2426 /* reset and determine device classes */
2427 ap
->ops
->phy_reset(ap
);
2429 ata_link_for_each_dev(dev
, &ap
->link
) {
2430 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2431 dev
->class != ATA_DEV_UNKNOWN
)
2432 classes
[dev
->devno
] = dev
->class;
2434 classes
[dev
->devno
] = ATA_DEV_NONE
;
2436 dev
->class = ATA_DEV_UNKNOWN
;
2441 /* read IDENTIFY page and configure devices. We have to do the identify
2442 specific sequence bass-ackwards so that PDIAG- is released by
2445 ata_link_for_each_dev(dev
, &ap
->link
) {
2446 if (tries
[dev
->devno
])
2447 dev
->class = classes
[dev
->devno
];
2449 if (!ata_dev_enabled(dev
))
2452 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2458 /* Now ask for the cable type as PDIAG- should have been released */
2459 if (ap
->ops
->cable_detect
)
2460 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2462 /* We may have SATA bridge glue hiding here irrespective of the
2463 reported cable types and sensed types */
2464 ata_link_for_each_dev(dev
, &ap
->link
) {
2465 if (!ata_dev_enabled(dev
))
2467 /* SATA drives indicate we have a bridge. We don't know which
2468 end of the link the bridge is which is a problem */
2469 if (ata_id_is_sata(dev
->id
))
2470 ap
->cbl
= ATA_CBL_SATA
;
2473 /* After the identify sequence we can now set up the devices. We do
2474 this in the normal order so that the user doesn't get confused */
2476 ata_link_for_each_dev(dev
, &ap
->link
) {
2477 if (!ata_dev_enabled(dev
))
2480 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2481 rc
= ata_dev_configure(dev
);
2482 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2487 /* configure transfer mode */
2488 rc
= ata_set_mode(&ap
->link
, &dev
);
2492 ata_link_for_each_dev(dev
, &ap
->link
)
2493 if (ata_dev_enabled(dev
))
2496 /* no device present, disable port */
2497 ata_port_disable(ap
);
2501 tries
[dev
->devno
]--;
2505 /* eeek, something went very wrong, give up */
2506 tries
[dev
->devno
] = 0;
2510 /* give it just one more chance */
2511 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2513 if (tries
[dev
->devno
] == 1) {
2514 /* This is the last chance, better to slow
2515 * down than lose it.
2517 sata_down_spd_limit(&ap
->link
);
2518 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2522 if (!tries
[dev
->devno
])
2523 ata_dev_disable(dev
);
2529 * ata_port_probe - Mark port as enabled
2530 * @ap: Port for which we indicate enablement
2532 * Modify @ap data structure such that the system
2533 * thinks that the entire port is enabled.
2535 * LOCKING: host lock, or some other form of
2539 void ata_port_probe(struct ata_port
*ap
)
2541 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2545 * sata_print_link_status - Print SATA link status
2546 * @link: SATA link to printk link status about
2548 * This function prints link speed and status of a SATA link.
2553 void sata_print_link_status(struct ata_link
*link
)
2555 u32 sstatus
, scontrol
, tmp
;
2557 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2559 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2561 if (ata_link_online(link
)) {
2562 tmp
= (sstatus
>> 4) & 0xf;
2563 ata_link_printk(link
, KERN_INFO
,
2564 "SATA link up %s (SStatus %X SControl %X)\n",
2565 sata_spd_string(tmp
), sstatus
, scontrol
);
2567 ata_link_printk(link
, KERN_INFO
,
2568 "SATA link down (SStatus %X SControl %X)\n",
2574 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2575 * @ap: SATA port associated with target SATA PHY.
2577 * This function issues commands to standard SATA Sxxx
2578 * PHY registers, to wake up the phy (and device), and
2579 * clear any reset condition.
2582 * PCI/etc. bus probe sem.
2585 void __sata_phy_reset(struct ata_port
*ap
)
2587 struct ata_link
*link
= &ap
->link
;
2588 unsigned long timeout
= jiffies
+ (HZ
* 5);
2591 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2592 /* issue phy wake/reset */
2593 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2594 /* Couldn't find anything in SATA I/II specs, but
2595 * AHCI-1.1 10.4.2 says at least 1 ms. */
2598 /* phy wake/clear reset */
2599 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2601 /* wait for phy to become ready, if necessary */
2604 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2605 if ((sstatus
& 0xf) != 1)
2607 } while (time_before(jiffies
, timeout
));
2609 /* print link status */
2610 sata_print_link_status(link
);
2612 /* TODO: phy layer with polling, timeouts, etc. */
2613 if (!ata_link_offline(link
))
2616 ata_port_disable(ap
);
2618 if (ap
->flags
& ATA_FLAG_DISABLED
)
2621 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2622 ata_port_disable(ap
);
2626 ap
->cbl
= ATA_CBL_SATA
;
2630 * sata_phy_reset - Reset SATA bus.
2631 * @ap: SATA port associated with target SATA PHY.
2633 * This function resets the SATA bus, and then probes
2634 * the bus for devices.
2637 * PCI/etc. bus probe sem.
2640 void sata_phy_reset(struct ata_port
*ap
)
2642 __sata_phy_reset(ap
);
2643 if (ap
->flags
& ATA_FLAG_DISABLED
)
2649 * ata_dev_pair - return other device on cable
2652 * Obtain the other device on the same cable, or if none is
2653 * present NULL is returned
2656 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2658 struct ata_link
*link
= adev
->link
;
2659 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2660 if (!ata_dev_enabled(pair
))
2666 * ata_port_disable - Disable port.
2667 * @ap: Port to be disabled.
2669 * Modify @ap data structure such that the system
2670 * thinks that the entire port is disabled, and should
2671 * never attempt to probe or communicate with devices
2674 * LOCKING: host lock, or some other form of
2678 void ata_port_disable(struct ata_port
*ap
)
2680 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2681 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2682 ap
->flags
|= ATA_FLAG_DISABLED
;
2686 * sata_down_spd_limit - adjust SATA spd limit downward
2687 * @link: Link to adjust SATA spd limit for
2689 * Adjust SATA spd limit of @link downward. Note that this
2690 * function only adjusts the limit. The change must be applied
2691 * using sata_set_spd().
2694 * Inherited from caller.
2697 * 0 on success, negative errno on failure
2699 int sata_down_spd_limit(struct ata_link
*link
)
2701 u32 sstatus
, spd
, mask
;
2704 if (!sata_scr_valid(link
))
2707 /* If SCR can be read, use it to determine the current SPD.
2708 * If not, use cached value in link->sata_spd.
2710 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2712 spd
= (sstatus
>> 4) & 0xf;
2714 spd
= link
->sata_spd
;
2716 mask
= link
->sata_spd_limit
;
2720 /* unconditionally mask off the highest bit */
2721 highbit
= fls(mask
) - 1;
2722 mask
&= ~(1 << highbit
);
2724 /* Mask off all speeds higher than or equal to the current
2725 * one. Force 1.5Gbps if current SPD is not available.
2728 mask
&= (1 << (spd
- 1)) - 1;
2732 /* were we already at the bottom? */
2736 link
->sata_spd_limit
= mask
;
2738 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2739 sata_spd_string(fls(mask
)));
2744 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2748 if (link
->sata_spd_limit
== UINT_MAX
)
2751 limit
= fls(link
->sata_spd_limit
);
2753 spd
= (*scontrol
>> 4) & 0xf;
2754 *scontrol
= (*scontrol
& ~0xf0) | ((limit
& 0xf) << 4);
2756 return spd
!= limit
;
2760 * sata_set_spd_needed - is SATA spd configuration needed
2761 * @link: Link in question
2763 * Test whether the spd limit in SControl matches
2764 * @link->sata_spd_limit. This function is used to determine
2765 * whether hardreset is necessary to apply SATA spd
2769 * Inherited from caller.
2772 * 1 if SATA spd configuration is needed, 0 otherwise.
2774 int sata_set_spd_needed(struct ata_link
*link
)
2778 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2781 return __sata_set_spd_needed(link
, &scontrol
);
2785 * sata_set_spd - set SATA spd according to spd limit
2786 * @link: Link to set SATA spd for
2788 * Set SATA spd of @link according to sata_spd_limit.
2791 * Inherited from caller.
2794 * 0 if spd doesn't need to be changed, 1 if spd has been
2795 * changed. Negative errno if SCR registers are inaccessible.
2797 int sata_set_spd(struct ata_link
*link
)
2802 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2805 if (!__sata_set_spd_needed(link
, &scontrol
))
2808 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2815 * This mode timing computation functionality is ported over from
2816 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2819 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2820 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2821 * for UDMA6, which is currently supported only by Maxtor drives.
2823 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2826 static const struct ata_timing ata_timing
[] = {
2828 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2829 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2830 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2831 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2833 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2834 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2835 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2836 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2837 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2839 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2841 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2842 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2843 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2845 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2846 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2847 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2849 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2850 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2851 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2852 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2854 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2855 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2856 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2858 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2863 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2864 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2866 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2868 q
->setup
= EZ(t
->setup
* 1000, T
);
2869 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2870 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2871 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2872 q
->active
= EZ(t
->active
* 1000, T
);
2873 q
->recover
= EZ(t
->recover
* 1000, T
);
2874 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2875 q
->udma
= EZ(t
->udma
* 1000, UT
);
2878 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2879 struct ata_timing
*m
, unsigned int what
)
2881 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2882 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2883 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2884 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2885 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2886 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2887 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2888 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2891 static const struct ata_timing
*ata_timing_find_mode(unsigned short speed
)
2893 const struct ata_timing
*t
;
2895 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2896 if (t
->mode
== 0xFF)
2901 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2902 struct ata_timing
*t
, int T
, int UT
)
2904 const struct ata_timing
*s
;
2905 struct ata_timing p
;
2911 if (!(s
= ata_timing_find_mode(speed
)))
2914 memcpy(t
, s
, sizeof(*s
));
2917 * If the drive is an EIDE drive, it can tell us it needs extended
2918 * PIO/MW_DMA cycle timing.
2921 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2922 memset(&p
, 0, sizeof(p
));
2923 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2924 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2925 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2926 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2927 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2929 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2933 * Convert the timing to bus clock counts.
2936 ata_timing_quantize(t
, t
, T
, UT
);
2939 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2940 * S.M.A.R.T * and some other commands. We have to ensure that the
2941 * DMA cycle timing is slower/equal than the fastest PIO timing.
2944 if (speed
> XFER_PIO_6
) {
2945 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2946 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2950 * Lengthen active & recovery time so that cycle time is correct.
2953 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2954 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2955 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2958 if (t
->active
+ t
->recover
< t
->cycle
) {
2959 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2960 t
->recover
= t
->cycle
- t
->active
;
2963 /* In a few cases quantisation may produce enough errors to
2964 leave t->cycle too low for the sum of active and recovery
2965 if so we must correct this */
2966 if (t
->active
+ t
->recover
> t
->cycle
)
2967 t
->cycle
= t
->active
+ t
->recover
;
2973 * ata_down_xfermask_limit - adjust dev xfer masks downward
2974 * @dev: Device to adjust xfer masks
2975 * @sel: ATA_DNXFER_* selector
2977 * Adjust xfer masks of @dev downward. Note that this function
2978 * does not apply the change. Invoking ata_set_mode() afterwards
2979 * will apply the limit.
2982 * Inherited from caller.
2985 * 0 on success, negative errno on failure
2987 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
2990 unsigned int orig_mask
, xfer_mask
;
2991 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
2994 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
2995 sel
&= ~ATA_DNXFER_QUIET
;
2997 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3000 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3003 case ATA_DNXFER_PIO
:
3004 highbit
= fls(pio_mask
) - 1;
3005 pio_mask
&= ~(1 << highbit
);
3008 case ATA_DNXFER_DMA
:
3010 highbit
= fls(udma_mask
) - 1;
3011 udma_mask
&= ~(1 << highbit
);
3014 } else if (mwdma_mask
) {
3015 highbit
= fls(mwdma_mask
) - 1;
3016 mwdma_mask
&= ~(1 << highbit
);
3022 case ATA_DNXFER_40C
:
3023 udma_mask
&= ATA_UDMA_MASK_40C
;
3026 case ATA_DNXFER_FORCE_PIO0
:
3028 case ATA_DNXFER_FORCE_PIO
:
3037 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3039 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3043 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3044 snprintf(buf
, sizeof(buf
), "%s:%s",
3045 ata_mode_string(xfer_mask
),
3046 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3048 snprintf(buf
, sizeof(buf
), "%s",
3049 ata_mode_string(xfer_mask
));
3051 ata_dev_printk(dev
, KERN_WARNING
,
3052 "limiting speed to %s\n", buf
);
3055 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3061 static int ata_dev_set_mode(struct ata_device
*dev
)
3063 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3064 unsigned int err_mask
;
3067 dev
->flags
&= ~ATA_DFLAG_PIO
;
3068 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3069 dev
->flags
|= ATA_DFLAG_PIO
;
3071 err_mask
= ata_dev_set_xfermode(dev
);
3073 /* Old CFA may refuse this command, which is just fine */
3074 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3075 err_mask
&= ~AC_ERR_DEV
;
3077 /* Some very old devices and some bad newer ones fail any kind of
3078 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3079 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3080 dev
->pio_mode
<= XFER_PIO_2
)
3081 err_mask
&= ~AC_ERR_DEV
;
3083 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3084 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3085 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3086 dev
->dma_mode
== XFER_MW_DMA_0
&&
3087 (dev
->id
[63] >> 8) & 1)
3088 err_mask
&= ~AC_ERR_DEV
;
3091 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3092 "(err_mask=0x%x)\n", err_mask
);
3096 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3097 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3098 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3102 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3103 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3105 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
3106 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
3111 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3112 * @link: link on which timings will be programmed
3113 * @r_failed_dev: out paramter for failed device
3115 * Standard implementation of the function used to tune and set
3116 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3117 * ata_dev_set_mode() fails, pointer to the failing device is
3118 * returned in @r_failed_dev.
3121 * PCI/etc. bus probe sem.
3124 * 0 on success, negative errno otherwise
3127 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3129 struct ata_port
*ap
= link
->ap
;
3130 struct ata_device
*dev
;
3131 int rc
= 0, used_dma
= 0, found
= 0;
3133 /* step 1: calculate xfer_mask */
3134 ata_link_for_each_dev(dev
, link
) {
3135 unsigned int pio_mask
, dma_mask
;
3136 unsigned int mode_mask
;
3138 if (!ata_dev_enabled(dev
))
3141 mode_mask
= ATA_DMA_MASK_ATA
;
3142 if (dev
->class == ATA_DEV_ATAPI
)
3143 mode_mask
= ATA_DMA_MASK_ATAPI
;
3144 else if (ata_id_is_cfa(dev
->id
))
3145 mode_mask
= ATA_DMA_MASK_CFA
;
3147 ata_dev_xfermask(dev
);
3149 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3150 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3152 if (libata_dma_mask
& mode_mask
)
3153 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3157 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3158 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3167 /* step 2: always set host PIO timings */
3168 ata_link_for_each_dev(dev
, link
) {
3169 if (!ata_dev_enabled(dev
))
3172 if (!dev
->pio_mode
) {
3173 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3178 dev
->xfer_mode
= dev
->pio_mode
;
3179 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3180 if (ap
->ops
->set_piomode
)
3181 ap
->ops
->set_piomode(ap
, dev
);
3184 /* step 3: set host DMA timings */
3185 ata_link_for_each_dev(dev
, link
) {
3186 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
3189 dev
->xfer_mode
= dev
->dma_mode
;
3190 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3191 if (ap
->ops
->set_dmamode
)
3192 ap
->ops
->set_dmamode(ap
, dev
);
3195 /* step 4: update devices' xfer mode */
3196 ata_link_for_each_dev(dev
, link
) {
3197 /* don't update suspended devices' xfer mode */
3198 if (!ata_dev_enabled(dev
))
3201 rc
= ata_dev_set_mode(dev
);
3206 /* Record simplex status. If we selected DMA then the other
3207 * host channels are not permitted to do so.
3209 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3210 ap
->host
->simplex_claimed
= ap
;
3214 *r_failed_dev
= dev
;
3219 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3220 * @link: link on which timings will be programmed
3221 * @r_failed_dev: out paramter for failed device
3223 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3224 * ata_set_mode() fails, pointer to the failing device is
3225 * returned in @r_failed_dev.
3228 * PCI/etc. bus probe sem.
3231 * 0 on success, negative errno otherwise
3233 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3235 struct ata_port
*ap
= link
->ap
;
3237 /* has private set_mode? */
3238 if (ap
->ops
->set_mode
)
3239 return ap
->ops
->set_mode(link
, r_failed_dev
);
3240 return ata_do_set_mode(link
, r_failed_dev
);
3244 * ata_tf_to_host - issue ATA taskfile to host controller
3245 * @ap: port to which command is being issued
3246 * @tf: ATA taskfile register set
3248 * Issues ATA taskfile register set to ATA host controller,
3249 * with proper synchronization with interrupt handler and
3253 * spin_lock_irqsave(host lock)
3256 static inline void ata_tf_to_host(struct ata_port
*ap
,
3257 const struct ata_taskfile
*tf
)
3259 ap
->ops
->tf_load(ap
, tf
);
3260 ap
->ops
->exec_command(ap
, tf
);
3264 * ata_busy_sleep - sleep until BSY clears, or timeout
3265 * @ap: port containing status register to be polled
3266 * @tmout_pat: impatience timeout
3267 * @tmout: overall timeout
3269 * Sleep until ATA Status register bit BSY clears,
3270 * or a timeout occurs.
3273 * Kernel thread context (may sleep).
3276 * 0 on success, -errno otherwise.
3278 int ata_busy_sleep(struct ata_port
*ap
,
3279 unsigned long tmout_pat
, unsigned long tmout
)
3281 unsigned long timer_start
, timeout
;
3284 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3285 timer_start
= jiffies
;
3286 timeout
= timer_start
+ tmout_pat
;
3287 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3288 time_before(jiffies
, timeout
)) {
3290 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3293 if (status
!= 0xff && (status
& ATA_BUSY
))
3294 ata_port_printk(ap
, KERN_WARNING
,
3295 "port is slow to respond, please be patient "
3296 "(Status 0x%x)\n", status
);
3298 timeout
= timer_start
+ tmout
;
3299 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3300 time_before(jiffies
, timeout
)) {
3302 status
= ata_chk_status(ap
);
3308 if (status
& ATA_BUSY
) {
3309 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3310 "(%lu secs, Status 0x%x)\n",
3311 tmout
/ HZ
, status
);
3319 * ata_wait_after_reset - wait before checking status after reset
3320 * @ap: port containing status register to be polled
3321 * @deadline: deadline jiffies for the operation
3323 * After reset, we need to pause a while before reading status.
3324 * Also, certain combination of controller and device report 0xff
3325 * for some duration (e.g. until SATA PHY is up and running)
3326 * which is interpreted as empty port in ATA world. This
3327 * function also waits for such devices to get out of 0xff
3331 * Kernel thread context (may sleep).
3333 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3335 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3337 if (time_before(until
, deadline
))
3340 /* Spec mandates ">= 2ms" before checking status. We wait
3341 * 150ms, because that was the magic delay used for ATAPI
3342 * devices in Hale Landis's ATADRVR, for the period of time
3343 * between when the ATA command register is written, and then
3344 * status is checked. Because waiting for "a while" before
3345 * checking status is fine, post SRST, we perform this magic
3346 * delay here as well.
3348 * Old drivers/ide uses the 2mS rule and then waits for ready.
3352 /* Wait for 0xff to clear. Some SATA devices take a long time
3353 * to clear 0xff after reset. For example, HHD424020F7SV00
3354 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3358 u8 status
= ata_chk_status(ap
);
3360 if (status
!= 0xff || time_after(jiffies
, deadline
))
3368 * ata_wait_ready - sleep until BSY clears, or timeout
3369 * @ap: port containing status register to be polled
3370 * @deadline: deadline jiffies for the operation
3372 * Sleep until ATA Status register bit BSY clears, or timeout
3376 * Kernel thread context (may sleep).
3379 * 0 on success, -errno otherwise.
3381 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3383 unsigned long start
= jiffies
;
3387 u8 status
= ata_chk_status(ap
);
3388 unsigned long now
= jiffies
;
3390 if (!(status
& ATA_BUSY
))
3392 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3394 if (time_after(now
, deadline
))
3397 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3398 (deadline
- now
> 3 * HZ
)) {
3399 ata_port_printk(ap
, KERN_WARNING
,
3400 "port is slow to respond, please be patient "
3401 "(Status 0x%x)\n", status
);
3409 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3410 unsigned long deadline
)
3412 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3413 unsigned int dev0
= devmask
& (1 << 0);
3414 unsigned int dev1
= devmask
& (1 << 1);
3417 /* if device 0 was found in ata_devchk, wait for its
3421 rc
= ata_wait_ready(ap
, deadline
);
3429 /* if device 1 was found in ata_devchk, wait for register
3430 * access briefly, then wait for BSY to clear.
3435 ap
->ops
->dev_select(ap
, 1);
3437 /* Wait for register access. Some ATAPI devices fail
3438 * to set nsect/lbal after reset, so don't waste too
3439 * much time on it. We're gonna wait for !BSY anyway.
3441 for (i
= 0; i
< 2; i
++) {
3444 nsect
= ioread8(ioaddr
->nsect_addr
);
3445 lbal
= ioread8(ioaddr
->lbal_addr
);
3446 if ((nsect
== 1) && (lbal
== 1))
3448 msleep(50); /* give drive a breather */
3451 rc
= ata_wait_ready(ap
, deadline
);
3459 /* is all this really necessary? */
3460 ap
->ops
->dev_select(ap
, 0);
3462 ap
->ops
->dev_select(ap
, 1);
3464 ap
->ops
->dev_select(ap
, 0);
3469 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3470 unsigned long deadline
)
3472 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3474 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3476 /* software reset. causes dev0 to be selected */
3477 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3478 udelay(20); /* FIXME: flush */
3479 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3480 udelay(20); /* FIXME: flush */
3481 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3483 /* wait a while before checking status */
3484 ata_wait_after_reset(ap
, deadline
);
3486 /* Before we perform post reset processing we want to see if
3487 * the bus shows 0xFF because the odd clown forgets the D7
3488 * pulldown resistor.
3490 if (ata_chk_status(ap
) == 0xFF)
3493 return ata_bus_post_reset(ap
, devmask
, deadline
);
3497 * ata_bus_reset - reset host port and associated ATA channel
3498 * @ap: port to reset
3500 * This is typically the first time we actually start issuing
3501 * commands to the ATA channel. We wait for BSY to clear, then
3502 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3503 * result. Determine what devices, if any, are on the channel
3504 * by looking at the device 0/1 error register. Look at the signature
3505 * stored in each device's taskfile registers, to determine if
3506 * the device is ATA or ATAPI.
3509 * PCI/etc. bus probe sem.
3510 * Obtains host lock.
3513 * Sets ATA_FLAG_DISABLED if bus reset fails.
3516 void ata_bus_reset(struct ata_port
*ap
)
3518 struct ata_device
*device
= ap
->link
.device
;
3519 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3520 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3522 unsigned int dev0
, dev1
= 0, devmask
= 0;
3525 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3527 /* determine if device 0/1 are present */
3528 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3531 dev0
= ata_devchk(ap
, 0);
3533 dev1
= ata_devchk(ap
, 1);
3537 devmask
|= (1 << 0);
3539 devmask
|= (1 << 1);
3541 /* select device 0 again */
3542 ap
->ops
->dev_select(ap
, 0);
3544 /* issue bus reset */
3545 if (ap
->flags
& ATA_FLAG_SRST
) {
3546 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3547 if (rc
&& rc
!= -ENODEV
)
3552 * determine by signature whether we have ATA or ATAPI devices
3554 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3555 if ((slave_possible
) && (err
!= 0x81))
3556 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3558 /* is double-select really necessary? */
3559 if (device
[1].class != ATA_DEV_NONE
)
3560 ap
->ops
->dev_select(ap
, 1);
3561 if (device
[0].class != ATA_DEV_NONE
)
3562 ap
->ops
->dev_select(ap
, 0);
3564 /* if no devices were detected, disable this port */
3565 if ((device
[0].class == ATA_DEV_NONE
) &&
3566 (device
[1].class == ATA_DEV_NONE
))
3569 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3570 /* set up device control for ATA_FLAG_SATA_RESET */
3571 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3578 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3579 ata_port_disable(ap
);
3585 * sata_link_debounce - debounce SATA phy status
3586 * @link: ATA link to debounce SATA phy status for
3587 * @params: timing parameters { interval, duratinon, timeout } in msec
3588 * @deadline: deadline jiffies for the operation
3590 * Make sure SStatus of @link reaches stable state, determined by
3591 * holding the same value where DET is not 1 for @duration polled
3592 * every @interval, before @timeout. Timeout constraints the
3593 * beginning of the stable state. Because DET gets stuck at 1 on
3594 * some controllers after hot unplugging, this functions waits
3595 * until timeout then returns 0 if DET is stable at 1.
3597 * @timeout is further limited by @deadline. The sooner of the
3601 * Kernel thread context (may sleep)
3604 * 0 on success, -errno on failure.
3606 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3607 unsigned long deadline
)
3609 unsigned long interval_msec
= params
[0];
3610 unsigned long duration
= msecs_to_jiffies(params
[1]);
3611 unsigned long last_jiffies
, t
;
3615 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3616 if (time_before(t
, deadline
))
3619 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3624 last_jiffies
= jiffies
;
3627 msleep(interval_msec
);
3628 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3634 if (cur
== 1 && time_before(jiffies
, deadline
))
3636 if (time_after(jiffies
, last_jiffies
+ duration
))
3641 /* unstable, start over */
3643 last_jiffies
= jiffies
;
3645 /* Check deadline. If debouncing failed, return
3646 * -EPIPE to tell upper layer to lower link speed.
3648 if (time_after(jiffies
, deadline
))
3654 * sata_link_resume - resume SATA link
3655 * @link: ATA link to resume SATA
3656 * @params: timing parameters { interval, duratinon, timeout } in msec
3657 * @deadline: deadline jiffies for the operation
3659 * Resume SATA phy @link and debounce it.
3662 * Kernel thread context (may sleep)
3665 * 0 on success, -errno on failure.
3667 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3668 unsigned long deadline
)
3673 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3676 scontrol
= (scontrol
& 0x0f0) | 0x300;
3678 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3681 /* Some PHYs react badly if SStatus is pounded immediately
3682 * after resuming. Delay 200ms before debouncing.
3686 return sata_link_debounce(link
, params
, deadline
);
3690 * ata_std_prereset - prepare for reset
3691 * @link: ATA link to be reset
3692 * @deadline: deadline jiffies for the operation
3694 * @link is about to be reset. Initialize it. Failure from
3695 * prereset makes libata abort whole reset sequence and give up
3696 * that port, so prereset should be best-effort. It does its
3697 * best to prepare for reset sequence but if things go wrong, it
3698 * should just whine, not fail.
3701 * Kernel thread context (may sleep)
3704 * 0 on success, -errno otherwise.
3706 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3708 struct ata_port
*ap
= link
->ap
;
3709 struct ata_eh_context
*ehc
= &link
->eh_context
;
3710 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3713 /* handle link resume */
3714 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3715 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3716 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3718 /* Some PMPs don't work with only SRST, force hardreset if PMP
3721 if (ap
->flags
& ATA_FLAG_PMP
)
3722 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3724 /* if we're about to do hardreset, nothing more to do */
3725 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3728 /* if SATA, resume link */
3729 if (ap
->flags
& ATA_FLAG_SATA
) {
3730 rc
= sata_link_resume(link
, timing
, deadline
);
3731 /* whine about phy resume failure but proceed */
3732 if (rc
&& rc
!= -EOPNOTSUPP
)
3733 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3734 "link for reset (errno=%d)\n", rc
);
3737 /* Wait for !BSY if the controller can wait for the first D2H
3738 * Reg FIS and we don't know that no device is attached.
3740 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3741 rc
= ata_wait_ready(ap
, deadline
);
3742 if (rc
&& rc
!= -ENODEV
) {
3743 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3744 "(errno=%d), forcing hardreset\n", rc
);
3745 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3753 * ata_std_softreset - reset host port via ATA SRST
3754 * @link: ATA link to reset
3755 * @classes: resulting classes of attached devices
3756 * @deadline: deadline jiffies for the operation
3758 * Reset host port using ATA SRST.
3761 * Kernel thread context (may sleep)
3764 * 0 on success, -errno otherwise.
3766 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3767 unsigned long deadline
)
3769 struct ata_port
*ap
= link
->ap
;
3770 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3771 unsigned int devmask
= 0;
3777 if (ata_link_offline(link
)) {
3778 classes
[0] = ATA_DEV_NONE
;
3782 /* determine if device 0/1 are present */
3783 if (ata_devchk(ap
, 0))
3784 devmask
|= (1 << 0);
3785 if (slave_possible
&& ata_devchk(ap
, 1))
3786 devmask
|= (1 << 1);
3788 /* select device 0 again */
3789 ap
->ops
->dev_select(ap
, 0);
3791 /* issue bus reset */
3792 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3793 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3794 /* if link is occupied, -ENODEV too is an error */
3795 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3796 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3800 /* determine by signature whether we have ATA or ATAPI devices */
3801 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3802 devmask
& (1 << 0), &err
);
3803 if (slave_possible
&& err
!= 0x81)
3804 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3805 devmask
& (1 << 1), &err
);
3808 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3813 * sata_link_hardreset - reset link via SATA phy reset
3814 * @link: link to reset
3815 * @timing: timing parameters { interval, duratinon, timeout } in msec
3816 * @deadline: deadline jiffies for the operation
3818 * SATA phy-reset @link using DET bits of SControl register.
3821 * Kernel thread context (may sleep)
3824 * 0 on success, -errno otherwise.
3826 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3827 unsigned long deadline
)
3834 if (sata_set_spd_needed(link
)) {
3835 /* SATA spec says nothing about how to reconfigure
3836 * spd. To be on the safe side, turn off phy during
3837 * reconfiguration. This works for at least ICH7 AHCI
3840 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3843 scontrol
= (scontrol
& 0x0f0) | 0x304;
3845 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3851 /* issue phy wake/reset */
3852 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3855 scontrol
= (scontrol
& 0x0f0) | 0x301;
3857 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3860 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3861 * 10.4.2 says at least 1 ms.
3865 /* bring link back */
3866 rc
= sata_link_resume(link
, timing
, deadline
);
3868 DPRINTK("EXIT, rc=%d\n", rc
);
3873 * sata_std_hardreset - reset host port via SATA phy reset
3874 * @link: link to reset
3875 * @class: resulting class of attached device
3876 * @deadline: deadline jiffies for the operation
3878 * SATA phy-reset host port using DET bits of SControl register,
3879 * wait for !BSY and classify the attached device.
3882 * Kernel thread context (may sleep)
3885 * 0 on success, -errno otherwise.
3887 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3888 unsigned long deadline
)
3890 struct ata_port
*ap
= link
->ap
;
3891 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3897 rc
= sata_link_hardreset(link
, timing
, deadline
);
3899 ata_link_printk(link
, KERN_ERR
,
3900 "COMRESET failed (errno=%d)\n", rc
);
3904 /* TODO: phy layer with polling, timeouts, etc. */
3905 if (ata_link_offline(link
)) {
3906 *class = ATA_DEV_NONE
;
3907 DPRINTK("EXIT, link offline\n");
3911 /* wait a while before checking status */
3912 ata_wait_after_reset(ap
, deadline
);
3914 /* If PMP is supported, we have to do follow-up SRST. Note
3915 * that some PMPs don't send D2H Reg FIS after hardreset at
3916 * all if the first port is empty. Wait for it just for a
3917 * second and request follow-up SRST.
3919 if (ap
->flags
& ATA_FLAG_PMP
) {
3920 ata_wait_ready(ap
, jiffies
+ HZ
);
3924 rc
= ata_wait_ready(ap
, deadline
);
3925 /* link occupied, -ENODEV too is an error */
3927 ata_link_printk(link
, KERN_ERR
,
3928 "COMRESET failed (errno=%d)\n", rc
);
3932 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3934 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3936 DPRINTK("EXIT, class=%u\n", *class);
3941 * ata_std_postreset - standard postreset callback
3942 * @link: the target ata_link
3943 * @classes: classes of attached devices
3945 * This function is invoked after a successful reset. Note that
3946 * the device might have been reset more than once using
3947 * different reset methods before postreset is invoked.
3950 * Kernel thread context (may sleep)
3952 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3954 struct ata_port
*ap
= link
->ap
;
3959 /* print link status */
3960 sata_print_link_status(link
);
3963 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3964 sata_scr_write(link
, SCR_ERROR
, serror
);
3966 /* is double-select really necessary? */
3967 if (classes
[0] != ATA_DEV_NONE
)
3968 ap
->ops
->dev_select(ap
, 1);
3969 if (classes
[1] != ATA_DEV_NONE
)
3970 ap
->ops
->dev_select(ap
, 0);
3972 /* bail out if no device is present */
3973 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
3974 DPRINTK("EXIT, no device\n");
3978 /* set up device control */
3979 if (ap
->ioaddr
.ctl_addr
)
3980 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
3986 * ata_dev_same_device - Determine whether new ID matches configured device
3987 * @dev: device to compare against
3988 * @new_class: class of the new device
3989 * @new_id: IDENTIFY page of the new device
3991 * Compare @new_class and @new_id against @dev and determine
3992 * whether @dev is the device indicated by @new_class and
3999 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4001 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
4004 const u16
*old_id
= dev
->id
;
4005 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
4006 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
4008 if (dev
->class != new_class
) {
4009 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
4010 dev
->class, new_class
);
4014 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
4015 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
4016 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
4017 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
4019 if (strcmp(model
[0], model
[1])) {
4020 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
4021 "'%s' != '%s'\n", model
[0], model
[1]);
4025 if (strcmp(serial
[0], serial
[1])) {
4026 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
4027 "'%s' != '%s'\n", serial
[0], serial
[1]);
4035 * ata_dev_reread_id - Re-read IDENTIFY data
4036 * @dev: target ATA device
4037 * @readid_flags: read ID flags
4039 * Re-read IDENTIFY page and make sure @dev is still attached to
4043 * Kernel thread context (may sleep)
4046 * 0 on success, negative errno otherwise
4048 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4050 unsigned int class = dev
->class;
4051 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4055 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4059 /* is the device still there? */
4060 if (!ata_dev_same_device(dev
, class, id
))
4063 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4068 * ata_dev_revalidate - Revalidate ATA device
4069 * @dev: device to revalidate
4070 * @new_class: new class code
4071 * @readid_flags: read ID flags
4073 * Re-read IDENTIFY page, make sure @dev is still attached to the
4074 * port and reconfigure it according to the new IDENTIFY page.
4077 * Kernel thread context (may sleep)
4080 * 0 on success, negative errno otherwise
4082 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4083 unsigned int readid_flags
)
4085 u64 n_sectors
= dev
->n_sectors
;
4088 if (!ata_dev_enabled(dev
))
4091 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4092 if (ata_class_enabled(new_class
) &&
4093 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4094 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4095 dev
->class, new_class
);
4101 rc
= ata_dev_reread_id(dev
, readid_flags
);
4105 /* configure device according to the new ID */
4106 rc
= ata_dev_configure(dev
);
4110 /* verify n_sectors hasn't changed */
4111 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4112 dev
->n_sectors
!= n_sectors
) {
4113 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4115 (unsigned long long)n_sectors
,
4116 (unsigned long long)dev
->n_sectors
);
4118 /* restore original n_sectors */
4119 dev
->n_sectors
= n_sectors
;
4128 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4132 struct ata_blacklist_entry
{
4133 const char *model_num
;
4134 const char *model_rev
;
4135 unsigned long horkage
;
4138 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4139 /* Devices with DMA related problems under Linux */
4140 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4141 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4142 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4143 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4144 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4145 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4146 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4147 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4148 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4149 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4150 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4151 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4152 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4153 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4154 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4155 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4156 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4157 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4158 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4159 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4160 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4161 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4162 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4163 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4164 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4165 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4166 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4167 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4168 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4169 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4170 /* Odd clown on sil3726/4726 PMPs */
4171 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
4172 ATA_HORKAGE_SKIP_PM
},
4174 /* Weird ATAPI devices */
4175 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4177 /* Devices we expect to fail diagnostics */
4179 /* Devices where NCQ should be avoided */
4181 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4182 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4183 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4185 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4186 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4187 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
4188 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
4189 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4191 /* Blacklist entries taken from Silicon Image 3124/3132
4192 Windows driver .inf file - also several Linux problem reports */
4193 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4194 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4195 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4196 /* Drives which do spurious command completion */
4197 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
4198 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
4199 { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ
, },
4200 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
4201 { "Hitachi HTS542525K9SA00", "BBFOC31P", ATA_HORKAGE_NONCQ
, },
4202 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4203 { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ
, },
4204 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
4205 { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
4206 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
4207 { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ
, },
4208 { "ST9160821AS", "3.CCD", ATA_HORKAGE_NONCQ
, },
4209 { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ
, },
4210 { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ
, },
4211 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
4212 { "Maxtor 7V300F0", "VA111900", ATA_HORKAGE_NONCQ
, },
4214 /* devices which puke on READ_NATIVE_MAX */
4215 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4216 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4217 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4218 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4220 /* Devices which report 1 sector over size HPA */
4221 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4222 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4228 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4234 * check for trailing wildcard: *\0
4236 p
= strchr(patt
, wildchar
);
4237 if (p
&& ((*(p
+ 1)) == 0))
4248 return strncmp(patt
, name
, len
);
4251 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4253 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4254 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4255 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4257 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4258 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4260 while (ad
->model_num
) {
4261 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4262 if (ad
->model_rev
== NULL
)
4264 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4272 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4274 /* We don't support polling DMA.
4275 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4276 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4278 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4279 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4281 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4285 * ata_dev_xfermask - Compute supported xfermask of the given device
4286 * @dev: Device to compute xfermask for
4288 * Compute supported xfermask of @dev and store it in
4289 * dev->*_mask. This function is responsible for applying all
4290 * known limits including host controller limits, device
4296 static void ata_dev_xfermask(struct ata_device
*dev
)
4298 struct ata_link
*link
= dev
->link
;
4299 struct ata_port
*ap
= link
->ap
;
4300 struct ata_host
*host
= ap
->host
;
4301 unsigned long xfer_mask
;
4303 /* controller modes available */
4304 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4305 ap
->mwdma_mask
, ap
->udma_mask
);
4307 /* drive modes available */
4308 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4309 dev
->mwdma_mask
, dev
->udma_mask
);
4310 xfer_mask
&= ata_id_xfermask(dev
->id
);
4313 * CFA Advanced TrueIDE timings are not allowed on a shared
4316 if (ata_dev_pair(dev
)) {
4317 /* No PIO5 or PIO6 */
4318 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4319 /* No MWDMA3 or MWDMA 4 */
4320 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4323 if (ata_dma_blacklisted(dev
)) {
4324 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4325 ata_dev_printk(dev
, KERN_WARNING
,
4326 "device is on DMA blacklist, disabling DMA\n");
4329 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4330 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4331 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4332 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4333 "other device, disabling DMA\n");
4336 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4337 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4339 if (ap
->ops
->mode_filter
)
4340 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4342 /* Apply cable rule here. Don't apply it early because when
4343 * we handle hot plug the cable type can itself change.
4344 * Check this last so that we know if the transfer rate was
4345 * solely limited by the cable.
4346 * Unknown or 80 wire cables reported host side are checked
4347 * drive side as well. Cases where we know a 40wire cable
4348 * is used safely for 80 are not checked here.
4350 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4351 /* UDMA/44 or higher would be available */
4352 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4353 (ata_drive_40wire(dev
->id
) &&
4354 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4355 ap
->cbl
== ATA_CBL_PATA80
))) {
4356 ata_dev_printk(dev
, KERN_WARNING
,
4357 "limited to UDMA/33 due to 40-wire cable\n");
4358 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4361 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4362 &dev
->mwdma_mask
, &dev
->udma_mask
);
4366 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4367 * @dev: Device to which command will be sent
4369 * Issue SET FEATURES - XFER MODE command to device @dev
4373 * PCI/etc. bus probe sem.
4376 * 0 on success, AC_ERR_* mask otherwise.
4379 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4381 struct ata_taskfile tf
;
4382 unsigned int err_mask
;
4384 /* set up set-features taskfile */
4385 DPRINTK("set features - xfer mode\n");
4387 /* Some controllers and ATAPI devices show flaky interrupt
4388 * behavior after setting xfer mode. Use polling instead.
4390 ata_tf_init(dev
, &tf
);
4391 tf
.command
= ATA_CMD_SET_FEATURES
;
4392 tf
.feature
= SETFEATURES_XFER
;
4393 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4394 tf
.protocol
= ATA_PROT_NODATA
;
4395 tf
.nsect
= dev
->xfer_mode
;
4397 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4399 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4403 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4404 * @dev: Device to which command will be sent
4405 * @enable: Whether to enable or disable the feature
4406 * @feature: The sector count represents the feature to set
4408 * Issue SET FEATURES - SATA FEATURES command to device @dev
4409 * on port @ap with sector count
4412 * PCI/etc. bus probe sem.
4415 * 0 on success, AC_ERR_* mask otherwise.
4417 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4420 struct ata_taskfile tf
;
4421 unsigned int err_mask
;
4423 /* set up set-features taskfile */
4424 DPRINTK("set features - SATA features\n");
4426 ata_tf_init(dev
, &tf
);
4427 tf
.command
= ATA_CMD_SET_FEATURES
;
4428 tf
.feature
= enable
;
4429 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4430 tf
.protocol
= ATA_PROT_NODATA
;
4433 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4435 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4440 * ata_dev_init_params - Issue INIT DEV PARAMS command
4441 * @dev: Device to which command will be sent
4442 * @heads: Number of heads (taskfile parameter)
4443 * @sectors: Number of sectors (taskfile parameter)
4446 * Kernel thread context (may sleep)
4449 * 0 on success, AC_ERR_* mask otherwise.
4451 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4452 u16 heads
, u16 sectors
)
4454 struct ata_taskfile tf
;
4455 unsigned int err_mask
;
4457 /* Number of sectors per track 1-255. Number of heads 1-16 */
4458 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4459 return AC_ERR_INVALID
;
4461 /* set up init dev params taskfile */
4462 DPRINTK("init dev params \n");
4464 ata_tf_init(dev
, &tf
);
4465 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4466 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4467 tf
.protocol
= ATA_PROT_NODATA
;
4469 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4471 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4472 /* A clean abort indicates an original or just out of spec drive
4473 and we should continue as we issue the setup based on the
4474 drive reported working geometry */
4475 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4478 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4483 * ata_sg_clean - Unmap DMA memory associated with command
4484 * @qc: Command containing DMA memory to be released
4486 * Unmap all mapped DMA memory associated with this command.
4489 * spin_lock_irqsave(host lock)
4491 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4493 struct ata_port
*ap
= qc
->ap
;
4494 struct scatterlist
*sg
= qc
->__sg
;
4495 int dir
= qc
->dma_dir
;
4496 void *pad_buf
= NULL
;
4498 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4499 WARN_ON(sg
== NULL
);
4501 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4502 WARN_ON(qc
->n_elem
> 1);
4504 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4506 /* if we padded the buffer out to 32-bit bound, and data
4507 * xfer direction is from-device, we must copy from the
4508 * pad buffer back into the supplied buffer
4510 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4511 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4513 if (qc
->flags
& ATA_QCFLAG_SG
) {
4515 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4516 /* restore last sg */
4517 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4519 struct scatterlist
*psg
= &qc
->pad_sgent
;
4520 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4521 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4522 kunmap_atomic(addr
, KM_IRQ0
);
4526 dma_unmap_single(ap
->dev
,
4527 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4530 sg
->length
+= qc
->pad_len
;
4532 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4533 pad_buf
, qc
->pad_len
);
4536 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4541 * ata_fill_sg - Fill PCI IDE PRD table
4542 * @qc: Metadata associated with taskfile to be transferred
4544 * Fill PCI IDE PRD (scatter-gather) table with segments
4545 * associated with the current disk command.
4548 * spin_lock_irqsave(host lock)
4551 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4553 struct ata_port
*ap
= qc
->ap
;
4554 struct scatterlist
*sg
;
4557 WARN_ON(qc
->__sg
== NULL
);
4558 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4561 ata_for_each_sg(sg
, qc
) {
4565 /* determine if physical DMA addr spans 64K boundary.
4566 * Note h/w doesn't support 64-bit, so we unconditionally
4567 * truncate dma_addr_t to u32.
4569 addr
= (u32
) sg_dma_address(sg
);
4570 sg_len
= sg_dma_len(sg
);
4573 offset
= addr
& 0xffff;
4575 if ((offset
+ sg_len
) > 0x10000)
4576 len
= 0x10000 - offset
;
4578 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4579 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4580 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4589 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4593 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4594 * @qc: Metadata associated with taskfile to be transferred
4596 * Fill PCI IDE PRD (scatter-gather) table with segments
4597 * associated with the current disk command. Perform the fill
4598 * so that we avoid writing any length 64K records for
4599 * controllers that don't follow the spec.
4602 * spin_lock_irqsave(host lock)
4605 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4607 struct ata_port
*ap
= qc
->ap
;
4608 struct scatterlist
*sg
;
4611 WARN_ON(qc
->__sg
== NULL
);
4612 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4615 ata_for_each_sg(sg
, qc
) {
4617 u32 sg_len
, len
, blen
;
4619 /* determine if physical DMA addr spans 64K boundary.
4620 * Note h/w doesn't support 64-bit, so we unconditionally
4621 * truncate dma_addr_t to u32.
4623 addr
= (u32
) sg_dma_address(sg
);
4624 sg_len
= sg_dma_len(sg
);
4627 offset
= addr
& 0xffff;
4629 if ((offset
+ sg_len
) > 0x10000)
4630 len
= 0x10000 - offset
;
4632 blen
= len
& 0xffff;
4633 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4635 /* Some PATA chipsets like the CS5530 can't
4636 cope with 0x0000 meaning 64K as the spec says */
4637 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4639 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4641 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4642 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4651 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4655 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4656 * @qc: Metadata associated with taskfile to check
4658 * Allow low-level driver to filter ATA PACKET commands, returning
4659 * a status indicating whether or not it is OK to use DMA for the
4660 * supplied PACKET command.
4663 * spin_lock_irqsave(host lock)
4665 * RETURNS: 0 when ATAPI DMA can be used
4668 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4670 struct ata_port
*ap
= qc
->ap
;
4672 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4673 * few ATAPI devices choke on such DMA requests.
4675 if (unlikely(qc
->nbytes
& 15))
4678 if (ap
->ops
->check_atapi_dma
)
4679 return ap
->ops
->check_atapi_dma(qc
);
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.
5173 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
5175 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5176 struct scatterlist
*sg
= qc
->__sg
;
5177 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
5178 struct ata_port
*ap
= qc
->ap
;
5181 unsigned int offset
, count
;
5184 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
5185 ap
->hsm_task_state
= HSM_ST_LAST
;
5188 if (unlikely(no_more_sg
)) {
5190 * The end of qc->sg is reached and the device expects
5191 * more data to transfer. In order not to overrun qc->sg
5192 * and fulfill length specified in the byte count register,
5193 * - for read case, discard trailing data from the device
5194 * - for write case, padding zero data to the device
5196 u16 pad_buf
[1] = { 0 };
5197 unsigned int words
= bytes
>> 1;
5200 if (words
) /* warning if bytes > 1 */
5201 ata_dev_printk(qc
->dev
, KERN_WARNING
,
5202 "%u bytes trailing data\n", bytes
);
5204 for (i
= 0; i
< words
; i
++)
5205 ap
->ops
->data_xfer(qc
->dev
, (unsigned char *)pad_buf
, 2, do_write
);
5207 ap
->hsm_task_state
= HSM_ST_LAST
;
5214 offset
= sg
->offset
+ qc
->cursg_ofs
;
5216 /* get the current page and offset */
5217 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5218 offset
%= PAGE_SIZE
;
5220 /* don't overrun current sg */
5221 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5223 /* don't cross page boundaries */
5224 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5226 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5228 if (PageHighMem(page
)) {
5229 unsigned long flags
;
5231 /* FIXME: use bounce buffer */
5232 local_irq_save(flags
);
5233 buf
= kmap_atomic(page
, KM_IRQ0
);
5235 /* do the actual data transfer */
5236 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5238 kunmap_atomic(buf
, KM_IRQ0
);
5239 local_irq_restore(flags
);
5241 buf
= page_address(page
);
5242 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5246 qc
->curbytes
+= count
;
5247 qc
->cursg_ofs
+= count
;
5249 if (qc
->cursg_ofs
== sg
->length
) {
5250 if (qc
->cursg
== lsg
)
5253 qc
->cursg
= sg_next(qc
->cursg
);
5262 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5263 * @qc: Command on going
5265 * Transfer Transfer data from/to the ATAPI device.
5268 * Inherited from caller.
5271 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5273 struct ata_port
*ap
= qc
->ap
;
5274 struct ata_device
*dev
= qc
->dev
;
5275 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5276 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5278 /* Abuse qc->result_tf for temp storage of intermediate TF
5279 * here to save some kernel stack usage.
5280 * For normal completion, qc->result_tf is not relevant. For
5281 * error, qc->result_tf is later overwritten by ata_qc_complete().
5282 * So, the correctness of qc->result_tf is not affected.
5284 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5285 ireason
= qc
->result_tf
.nsect
;
5286 bc_lo
= qc
->result_tf
.lbam
;
5287 bc_hi
= qc
->result_tf
.lbah
;
5288 bytes
= (bc_hi
<< 8) | bc_lo
;
5290 /* shall be cleared to zero, indicating xfer of data */
5291 if (ireason
& (1 << 0))
5294 /* make sure transfer direction matches expected */
5295 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5296 if (do_write
!= i_write
)
5299 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5301 __atapi_pio_bytes(qc
, bytes
);
5302 ata_altstatus(ap
); /* flush */
5307 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5308 qc
->err_mask
|= AC_ERR_HSM
;
5309 ap
->hsm_task_state
= HSM_ST_ERR
;
5313 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5314 * @ap: the target ata_port
5318 * 1 if ok in workqueue, 0 otherwise.
5321 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5323 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5326 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5327 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5328 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5331 if (is_atapi_taskfile(&qc
->tf
) &&
5332 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5340 * ata_hsm_qc_complete - finish a qc running on standard HSM
5341 * @qc: Command to complete
5342 * @in_wq: 1 if called from workqueue, 0 otherwise
5344 * Finish @qc which is running on standard HSM.
5347 * If @in_wq is zero, spin_lock_irqsave(host lock).
5348 * Otherwise, none on entry and grabs host lock.
5350 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5352 struct ata_port
*ap
= qc
->ap
;
5353 unsigned long flags
;
5355 if (ap
->ops
->error_handler
) {
5357 spin_lock_irqsave(ap
->lock
, flags
);
5359 /* EH might have kicked in while host lock is
5362 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5364 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5365 ap
->ops
->irq_on(ap
);
5366 ata_qc_complete(qc
);
5368 ata_port_freeze(ap
);
5371 spin_unlock_irqrestore(ap
->lock
, flags
);
5373 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5374 ata_qc_complete(qc
);
5376 ata_port_freeze(ap
);
5380 spin_lock_irqsave(ap
->lock
, flags
);
5381 ap
->ops
->irq_on(ap
);
5382 ata_qc_complete(qc
);
5383 spin_unlock_irqrestore(ap
->lock
, flags
);
5385 ata_qc_complete(qc
);
5390 * ata_hsm_move - move the HSM to the next state.
5391 * @ap: the target ata_port
5393 * @status: current device status
5394 * @in_wq: 1 if called from workqueue, 0 otherwise
5397 * 1 when poll next status needed, 0 otherwise.
5399 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5400 u8 status
, int in_wq
)
5402 unsigned long flags
= 0;
5405 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5407 /* Make sure ata_qc_issue_prot() does not throw things
5408 * like DMA polling into the workqueue. Notice that
5409 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5411 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5414 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5415 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5417 switch (ap
->hsm_task_state
) {
5419 /* Send first data block or PACKET CDB */
5421 /* If polling, we will stay in the work queue after
5422 * sending the data. Otherwise, interrupt handler
5423 * takes over after sending the data.
5425 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5427 /* check device status */
5428 if (unlikely((status
& ATA_DRQ
) == 0)) {
5429 /* handle BSY=0, DRQ=0 as error */
5430 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5431 /* device stops HSM for abort/error */
5432 qc
->err_mask
|= AC_ERR_DEV
;
5434 /* HSM violation. Let EH handle this */
5435 qc
->err_mask
|= AC_ERR_HSM
;
5437 ap
->hsm_task_state
= HSM_ST_ERR
;
5441 /* Device should not ask for data transfer (DRQ=1)
5442 * when it finds something wrong.
5443 * We ignore DRQ here and stop the HSM by
5444 * changing hsm_task_state to HSM_ST_ERR and
5445 * let the EH abort the command or reset the device.
5447 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5448 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5449 "error, dev_stat 0x%X\n", status
);
5450 qc
->err_mask
|= AC_ERR_HSM
;
5451 ap
->hsm_task_state
= HSM_ST_ERR
;
5455 /* Send the CDB (atapi) or the first data block (ata pio out).
5456 * During the state transition, interrupt handler shouldn't
5457 * be invoked before the data transfer is complete and
5458 * hsm_task_state is changed. Hence, the following locking.
5461 spin_lock_irqsave(ap
->lock
, flags
);
5463 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5464 /* PIO data out protocol.
5465 * send first data block.
5468 /* ata_pio_sectors() might change the state
5469 * to HSM_ST_LAST. so, the state is changed here
5470 * before ata_pio_sectors().
5472 ap
->hsm_task_state
= HSM_ST
;
5473 ata_pio_sectors(qc
);
5476 atapi_send_cdb(ap
, qc
);
5479 spin_unlock_irqrestore(ap
->lock
, flags
);
5481 /* if polling, ata_pio_task() handles the rest.
5482 * otherwise, interrupt handler takes over from here.
5487 /* complete command or read/write the data register */
5488 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5489 /* ATAPI PIO protocol */
5490 if ((status
& ATA_DRQ
) == 0) {
5491 /* No more data to transfer or device error.
5492 * Device error will be tagged in HSM_ST_LAST.
5494 ap
->hsm_task_state
= HSM_ST_LAST
;
5498 /* Device should not ask for data transfer (DRQ=1)
5499 * when it finds something wrong.
5500 * We ignore DRQ here and stop the HSM by
5501 * changing hsm_task_state to HSM_ST_ERR and
5502 * let the EH abort the command or reset the device.
5504 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5505 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5506 "device error, dev_stat 0x%X\n",
5508 qc
->err_mask
|= AC_ERR_HSM
;
5509 ap
->hsm_task_state
= HSM_ST_ERR
;
5513 atapi_pio_bytes(qc
);
5515 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5516 /* bad ireason reported by device */
5520 /* ATA PIO protocol */
5521 if (unlikely((status
& ATA_DRQ
) == 0)) {
5522 /* handle BSY=0, DRQ=0 as error */
5523 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5524 /* device stops HSM for abort/error */
5525 qc
->err_mask
|= AC_ERR_DEV
;
5527 /* HSM violation. Let EH handle this.
5528 * Phantom devices also trigger this
5529 * condition. Mark hint.
5531 qc
->err_mask
|= AC_ERR_HSM
|
5534 ap
->hsm_task_state
= HSM_ST_ERR
;
5538 /* For PIO reads, some devices may ask for
5539 * data transfer (DRQ=1) alone with ERR=1.
5540 * We respect DRQ here and transfer one
5541 * block of junk data before changing the
5542 * hsm_task_state to HSM_ST_ERR.
5544 * For PIO writes, ERR=1 DRQ=1 doesn't make
5545 * sense since the data block has been
5546 * transferred to the device.
5548 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5549 /* data might be corrputed */
5550 qc
->err_mask
|= AC_ERR_DEV
;
5552 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5553 ata_pio_sectors(qc
);
5554 status
= ata_wait_idle(ap
);
5557 if (status
& (ATA_BUSY
| ATA_DRQ
))
5558 qc
->err_mask
|= AC_ERR_HSM
;
5560 /* ata_pio_sectors() might change the
5561 * state to HSM_ST_LAST. so, the state
5562 * is changed after ata_pio_sectors().
5564 ap
->hsm_task_state
= HSM_ST_ERR
;
5568 ata_pio_sectors(qc
);
5570 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5571 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5573 status
= ata_wait_idle(ap
);
5582 if (unlikely(!ata_ok(status
))) {
5583 qc
->err_mask
|= __ac_err_mask(status
);
5584 ap
->hsm_task_state
= HSM_ST_ERR
;
5588 /* no more data to transfer */
5589 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5590 ap
->print_id
, qc
->dev
->devno
, status
);
5592 WARN_ON(qc
->err_mask
);
5594 ap
->hsm_task_state
= HSM_ST_IDLE
;
5596 /* complete taskfile transaction */
5597 ata_hsm_qc_complete(qc
, in_wq
);
5603 /* make sure qc->err_mask is available to
5604 * know what's wrong and recover
5606 WARN_ON(qc
->err_mask
== 0);
5608 ap
->hsm_task_state
= HSM_ST_IDLE
;
5610 /* complete taskfile transaction */
5611 ata_hsm_qc_complete(qc
, in_wq
);
5623 static void ata_pio_task(struct work_struct
*work
)
5625 struct ata_port
*ap
=
5626 container_of(work
, struct ata_port
, port_task
.work
);
5627 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5632 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5635 * This is purely heuristic. This is a fast path.
5636 * Sometimes when we enter, BSY will be cleared in
5637 * a chk-status or two. If not, the drive is probably seeking
5638 * or something. Snooze for a couple msecs, then
5639 * chk-status again. If still busy, queue delayed work.
5641 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5642 if (status
& ATA_BUSY
) {
5644 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5645 if (status
& ATA_BUSY
) {
5646 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5652 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5654 /* another command or interrupt handler
5655 * may be running at this point.
5662 * ata_qc_new - Request an available ATA command, for queueing
5663 * @ap: Port associated with device @dev
5664 * @dev: Device from whom we request an available command structure
5670 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5672 struct ata_queued_cmd
*qc
= NULL
;
5675 /* no command while frozen */
5676 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5679 /* the last tag is reserved for internal command. */
5680 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5681 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5682 qc
= __ata_qc_from_tag(ap
, i
);
5693 * ata_qc_new_init - Request an available ATA command, and initialize it
5694 * @dev: Device from whom we request an available command structure
5700 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5702 struct ata_port
*ap
= dev
->link
->ap
;
5703 struct ata_queued_cmd
*qc
;
5705 qc
= ata_qc_new(ap
);
5718 * ata_qc_free - free unused ata_queued_cmd
5719 * @qc: Command to complete
5721 * Designed to free unused ata_queued_cmd object
5722 * in case something prevents using it.
5725 * spin_lock_irqsave(host lock)
5727 void ata_qc_free(struct ata_queued_cmd
*qc
)
5729 struct ata_port
*ap
= qc
->ap
;
5732 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5736 if (likely(ata_tag_valid(tag
))) {
5737 qc
->tag
= ATA_TAG_POISON
;
5738 clear_bit(tag
, &ap
->qc_allocated
);
5742 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5744 struct ata_port
*ap
= qc
->ap
;
5745 struct ata_link
*link
= qc
->dev
->link
;
5747 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5748 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5750 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5753 /* command should be marked inactive atomically with qc completion */
5754 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5755 link
->sactive
&= ~(1 << qc
->tag
);
5757 ap
->nr_active_links
--;
5759 link
->active_tag
= ATA_TAG_POISON
;
5760 ap
->nr_active_links
--;
5763 /* clear exclusive status */
5764 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5765 ap
->excl_link
== link
))
5766 ap
->excl_link
= NULL
;
5768 /* atapi: mark qc as inactive to prevent the interrupt handler
5769 * from completing the command twice later, before the error handler
5770 * is called. (when rc != 0 and atapi request sense is needed)
5772 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5773 ap
->qc_active
&= ~(1 << qc
->tag
);
5775 /* call completion callback */
5776 qc
->complete_fn(qc
);
5779 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5781 struct ata_port
*ap
= qc
->ap
;
5783 qc
->result_tf
.flags
= qc
->tf
.flags
;
5784 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5788 * ata_qc_complete - Complete an active ATA command
5789 * @qc: Command to complete
5790 * @err_mask: ATA Status register contents
5792 * Indicate to the mid and upper layers that an ATA
5793 * command has completed, with either an ok or not-ok status.
5796 * spin_lock_irqsave(host lock)
5798 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5800 struct ata_port
*ap
= qc
->ap
;
5802 /* XXX: New EH and old EH use different mechanisms to
5803 * synchronize EH with regular execution path.
5805 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5806 * Normal execution path is responsible for not accessing a
5807 * failed qc. libata core enforces the rule by returning NULL
5808 * from ata_qc_from_tag() for failed qcs.
5810 * Old EH depends on ata_qc_complete() nullifying completion
5811 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5812 * not synchronize with interrupt handler. Only PIO task is
5815 if (ap
->ops
->error_handler
) {
5816 struct ata_device
*dev
= qc
->dev
;
5817 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5819 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5821 if (unlikely(qc
->err_mask
))
5822 qc
->flags
|= ATA_QCFLAG_FAILED
;
5824 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5825 if (!ata_tag_internal(qc
->tag
)) {
5826 /* always fill result TF for failed qc */
5828 ata_qc_schedule_eh(qc
);
5833 /* read result TF if requested */
5834 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5837 /* Some commands need post-processing after successful
5840 switch (qc
->tf
.command
) {
5841 case ATA_CMD_SET_FEATURES
:
5842 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5843 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5846 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5847 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5848 /* revalidate device */
5849 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5850 ata_port_schedule_eh(ap
);
5854 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5858 __ata_qc_complete(qc
);
5860 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5863 /* read result TF if failed or requested */
5864 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5867 __ata_qc_complete(qc
);
5872 * ata_qc_complete_multiple - Complete multiple qcs successfully
5873 * @ap: port in question
5874 * @qc_active: new qc_active mask
5875 * @finish_qc: LLDD callback invoked before completing a qc
5877 * Complete in-flight commands. This functions is meant to be
5878 * called from low-level driver's interrupt routine to complete
5879 * requests normally. ap->qc_active and @qc_active is compared
5880 * and commands are completed accordingly.
5883 * spin_lock_irqsave(host lock)
5886 * Number of completed commands on success, -errno otherwise.
5888 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5889 void (*finish_qc
)(struct ata_queued_cmd
*))
5895 done_mask
= ap
->qc_active
^ qc_active
;
5897 if (unlikely(done_mask
& qc_active
)) {
5898 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5899 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5903 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5904 struct ata_queued_cmd
*qc
;
5906 if (!(done_mask
& (1 << i
)))
5909 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5912 ata_qc_complete(qc
);
5920 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5922 struct ata_port
*ap
= qc
->ap
;
5924 switch (qc
->tf
.protocol
) {
5927 case ATA_PROT_ATAPI_DMA
:
5930 case ATA_PROT_ATAPI
:
5932 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5945 * ata_qc_issue - issue taskfile to device
5946 * @qc: command to issue to device
5948 * Prepare an ATA command to submission to device.
5949 * This includes mapping the data into a DMA-able
5950 * area, filling in the S/G table, and finally
5951 * writing the taskfile to hardware, starting the command.
5954 * spin_lock_irqsave(host lock)
5956 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5958 struct ata_port
*ap
= qc
->ap
;
5959 struct ata_link
*link
= qc
->dev
->link
;
5961 /* Make sure only one non-NCQ command is outstanding. The
5962 * check is skipped for old EH because it reuses active qc to
5963 * request ATAPI sense.
5965 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5967 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5968 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5971 ap
->nr_active_links
++;
5972 link
->sactive
|= 1 << qc
->tag
;
5974 WARN_ON(link
->sactive
);
5976 ap
->nr_active_links
++;
5977 link
->active_tag
= qc
->tag
;
5980 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5981 ap
->qc_active
|= 1 << qc
->tag
;
5983 if (ata_should_dma_map(qc
)) {
5984 if (qc
->flags
& ATA_QCFLAG_SG
) {
5985 if (ata_sg_setup(qc
))
5987 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
5988 if (ata_sg_setup_one(qc
))
5992 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
5995 /* if device is sleeping, schedule softreset and abort the link */
5996 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5997 link
->eh_info
.action
|= ATA_EH_SOFTRESET
;
5998 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5999 ata_link_abort(link
);
6003 ap
->ops
->qc_prep(qc
);
6005 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
6006 if (unlikely(qc
->err_mask
))
6011 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6012 qc
->err_mask
|= AC_ERR_SYSTEM
;
6014 ata_qc_complete(qc
);
6018 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6019 * @qc: command to issue to device
6021 * Using various libata functions and hooks, this function
6022 * starts an ATA command. ATA commands are grouped into
6023 * classes called "protocols", and issuing each type of protocol
6024 * is slightly different.
6026 * May be used as the qc_issue() entry in ata_port_operations.
6029 * spin_lock_irqsave(host lock)
6032 * Zero on success, AC_ERR_* mask on failure
6035 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
6037 struct ata_port
*ap
= qc
->ap
;
6039 /* Use polling pio if the LLD doesn't handle
6040 * interrupt driven pio and atapi CDB interrupt.
6042 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
6043 switch (qc
->tf
.protocol
) {
6045 case ATA_PROT_NODATA
:
6046 case ATA_PROT_ATAPI
:
6047 case ATA_PROT_ATAPI_NODATA
:
6048 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
6050 case ATA_PROT_ATAPI_DMA
:
6051 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
6052 /* see ata_dma_blacklisted() */
6060 /* select the device */
6061 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
6063 /* start the command */
6064 switch (qc
->tf
.protocol
) {
6065 case ATA_PROT_NODATA
:
6066 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6067 ata_qc_set_polling(qc
);
6069 ata_tf_to_host(ap
, &qc
->tf
);
6070 ap
->hsm_task_state
= HSM_ST_LAST
;
6072 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6073 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6078 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6080 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6081 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6082 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
6083 ap
->hsm_task_state
= HSM_ST_LAST
;
6087 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6088 ata_qc_set_polling(qc
);
6090 ata_tf_to_host(ap
, &qc
->tf
);
6092 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
6093 /* PIO data out protocol */
6094 ap
->hsm_task_state
= HSM_ST_FIRST
;
6095 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6097 /* always send first data block using
6098 * the ata_pio_task() codepath.
6101 /* PIO data in protocol */
6102 ap
->hsm_task_state
= HSM_ST
;
6104 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6105 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6107 /* if polling, ata_pio_task() handles the rest.
6108 * otherwise, interrupt handler takes over from here.
6114 case ATA_PROT_ATAPI
:
6115 case ATA_PROT_ATAPI_NODATA
:
6116 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6117 ata_qc_set_polling(qc
);
6119 ata_tf_to_host(ap
, &qc
->tf
);
6121 ap
->hsm_task_state
= HSM_ST_FIRST
;
6123 /* send cdb by polling if no cdb interrupt */
6124 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
6125 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
6126 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6129 case ATA_PROT_ATAPI_DMA
:
6130 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6132 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6133 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6134 ap
->hsm_task_state
= HSM_ST_FIRST
;
6136 /* send cdb by polling if no cdb interrupt */
6137 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6138 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6143 return AC_ERR_SYSTEM
;
6150 * ata_host_intr - Handle host interrupt for given (port, task)
6151 * @ap: Port on which interrupt arrived (possibly...)
6152 * @qc: Taskfile currently active in engine
6154 * Handle host interrupt for given queued command. Currently,
6155 * only DMA interrupts are handled. All other commands are
6156 * handled via polling with interrupts disabled (nIEN bit).
6159 * spin_lock_irqsave(host lock)
6162 * One if interrupt was handled, zero if not (shared irq).
6165 inline unsigned int ata_host_intr(struct ata_port
*ap
,
6166 struct ata_queued_cmd
*qc
)
6168 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6169 u8 status
, host_stat
= 0;
6171 VPRINTK("ata%u: protocol %d task_state %d\n",
6172 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
6174 /* Check whether we are expecting interrupt in this state */
6175 switch (ap
->hsm_task_state
) {
6177 /* Some pre-ATAPI-4 devices assert INTRQ
6178 * at this state when ready to receive CDB.
6181 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6182 * The flag was turned on only for atapi devices.
6183 * No need to check is_atapi_taskfile(&qc->tf) again.
6185 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6189 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6190 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
6191 /* check status of DMA engine */
6192 host_stat
= ap
->ops
->bmdma_status(ap
);
6193 VPRINTK("ata%u: host_stat 0x%X\n",
6194 ap
->print_id
, host_stat
);
6196 /* if it's not our irq... */
6197 if (!(host_stat
& ATA_DMA_INTR
))
6200 /* before we do anything else, clear DMA-Start bit */
6201 ap
->ops
->bmdma_stop(qc
);
6203 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6204 /* error when transfering data to/from memory */
6205 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6206 ap
->hsm_task_state
= HSM_ST_ERR
;
6216 /* check altstatus */
6217 status
= ata_altstatus(ap
);
6218 if (status
& ATA_BUSY
)
6221 /* check main status, clearing INTRQ */
6222 status
= ata_chk_status(ap
);
6223 if (unlikely(status
& ATA_BUSY
))
6226 /* ack bmdma irq events */
6227 ap
->ops
->irq_clear(ap
);
6229 ata_hsm_move(ap
, qc
, status
, 0);
6231 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6232 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
6233 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6235 return 1; /* irq handled */
6238 ap
->stats
.idle_irq
++;
6241 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6243 ap
->ops
->irq_clear(ap
);
6244 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6248 return 0; /* irq not handled */
6252 * ata_interrupt - Default ATA host interrupt handler
6253 * @irq: irq line (unused)
6254 * @dev_instance: pointer to our ata_host information structure
6256 * Default interrupt handler for PCI IDE devices. Calls
6257 * ata_host_intr() for each port that is not disabled.
6260 * Obtains host lock during operation.
6263 * IRQ_NONE or IRQ_HANDLED.
6266 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6268 struct ata_host
*host
= dev_instance
;
6270 unsigned int handled
= 0;
6271 unsigned long flags
;
6273 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6274 spin_lock_irqsave(&host
->lock
, flags
);
6276 for (i
= 0; i
< host
->n_ports
; i
++) {
6277 struct ata_port
*ap
;
6279 ap
= host
->ports
[i
];
6281 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6282 struct ata_queued_cmd
*qc
;
6284 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6285 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6286 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6287 handled
|= ata_host_intr(ap
, qc
);
6291 spin_unlock_irqrestore(&host
->lock
, flags
);
6293 return IRQ_RETVAL(handled
);
6297 * sata_scr_valid - test whether SCRs are accessible
6298 * @link: ATA link to test SCR accessibility for
6300 * Test whether SCRs are accessible for @link.
6306 * 1 if SCRs are accessible, 0 otherwise.
6308 int sata_scr_valid(struct ata_link
*link
)
6310 struct ata_port
*ap
= link
->ap
;
6312 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6316 * sata_scr_read - read SCR register of the specified port
6317 * @link: ATA link to read SCR for
6319 * @val: Place to store read value
6321 * Read SCR register @reg of @link into *@val. This function is
6322 * guaranteed to succeed if @link is ap->link, the cable type of
6323 * the port is SATA and the port implements ->scr_read.
6326 * None if @link is ap->link. Kernel thread context otherwise.
6329 * 0 on success, negative errno on failure.
6331 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6333 if (ata_is_host_link(link
)) {
6334 struct ata_port
*ap
= link
->ap
;
6336 if (sata_scr_valid(link
))
6337 return ap
->ops
->scr_read(ap
, reg
, val
);
6341 return sata_pmp_scr_read(link
, reg
, val
);
6345 * sata_scr_write - write SCR register of the specified port
6346 * @link: ATA link to write SCR for
6347 * @reg: SCR to write
6348 * @val: value to write
6350 * Write @val to SCR register @reg of @link. This function is
6351 * guaranteed to succeed if @link is ap->link, the cable type of
6352 * the port is SATA and the port implements ->scr_read.
6355 * None if @link is ap->link. Kernel thread context otherwise.
6358 * 0 on success, negative errno on failure.
6360 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6362 if (ata_is_host_link(link
)) {
6363 struct ata_port
*ap
= link
->ap
;
6365 if (sata_scr_valid(link
))
6366 return ap
->ops
->scr_write(ap
, reg
, val
);
6370 return sata_pmp_scr_write(link
, reg
, val
);
6374 * sata_scr_write_flush - write SCR register of the specified port and flush
6375 * @link: ATA link to write SCR for
6376 * @reg: SCR to write
6377 * @val: value to write
6379 * This function is identical to sata_scr_write() except that this
6380 * function performs flush after writing to the register.
6383 * None if @link is ap->link. Kernel thread context otherwise.
6386 * 0 on success, negative errno on failure.
6388 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6390 if (ata_is_host_link(link
)) {
6391 struct ata_port
*ap
= link
->ap
;
6394 if (sata_scr_valid(link
)) {
6395 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6397 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6403 return sata_pmp_scr_write(link
, reg
, val
);
6407 * ata_link_online - test whether the given link is online
6408 * @link: ATA link to test
6410 * Test whether @link is online. Note that this function returns
6411 * 0 if online status of @link cannot be obtained, so
6412 * ata_link_online(link) != !ata_link_offline(link).
6418 * 1 if the port online status is available and online.
6420 int ata_link_online(struct ata_link
*link
)
6424 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6425 (sstatus
& 0xf) == 0x3)
6431 * ata_link_offline - test whether the given link is offline
6432 * @link: ATA link to test
6434 * Test whether @link is offline. Note that this function
6435 * returns 0 if offline status of @link cannot be obtained, so
6436 * ata_link_online(link) != !ata_link_offline(link).
6442 * 1 if the port offline status is available and offline.
6444 int ata_link_offline(struct ata_link
*link
)
6448 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6449 (sstatus
& 0xf) != 0x3)
6454 int ata_flush_cache(struct ata_device
*dev
)
6456 unsigned int err_mask
;
6459 if (!ata_try_flush_cache(dev
))
6462 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6463 cmd
= ATA_CMD_FLUSH_EXT
;
6465 cmd
= ATA_CMD_FLUSH
;
6467 /* This is wrong. On a failed flush we get back the LBA of the lost
6468 sector and we should (assuming it wasn't aborted as unknown) issue
6469 a further flush command to continue the writeback until it
6471 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6473 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6481 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6482 unsigned int action
, unsigned int ehi_flags
,
6485 unsigned long flags
;
6488 for (i
= 0; i
< host
->n_ports
; i
++) {
6489 struct ata_port
*ap
= host
->ports
[i
];
6490 struct ata_link
*link
;
6492 /* Previous resume operation might still be in
6493 * progress. Wait for PM_PENDING to clear.
6495 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6496 ata_port_wait_eh(ap
);
6497 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6500 /* request PM ops to EH */
6501 spin_lock_irqsave(ap
->lock
, flags
);
6506 ap
->pm_result
= &rc
;
6509 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6510 __ata_port_for_each_link(link
, ap
) {
6511 link
->eh_info
.action
|= action
;
6512 link
->eh_info
.flags
|= ehi_flags
;
6515 ata_port_schedule_eh(ap
);
6517 spin_unlock_irqrestore(ap
->lock
, flags
);
6519 /* wait and check result */
6521 ata_port_wait_eh(ap
);
6522 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6532 * ata_host_suspend - suspend host
6533 * @host: host to suspend
6536 * Suspend @host. Actual operation is performed by EH. This
6537 * function requests EH to perform PM operations and waits for EH
6541 * Kernel thread context (may sleep).
6544 * 0 on success, -errno on failure.
6546 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6551 * disable link pm on all ports before requesting
6554 ata_lpm_enable(host
);
6556 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6558 host
->dev
->power
.power_state
= mesg
;
6563 * ata_host_resume - resume host
6564 * @host: host to resume
6566 * Resume @host. Actual operation is performed by EH. This
6567 * function requests EH to perform PM operations and returns.
6568 * Note that all resume operations are performed parallely.
6571 * Kernel thread context (may sleep).
6573 void ata_host_resume(struct ata_host
*host
)
6575 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6576 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6577 host
->dev
->power
.power_state
= PMSG_ON
;
6579 /* reenable link pm */
6580 ata_lpm_disable(host
);
6585 * ata_port_start - Set port up for dma.
6586 * @ap: Port to initialize
6588 * Called just after data structures for each port are
6589 * initialized. Allocates space for PRD table.
6591 * May be used as the port_start() entry in ata_port_operations.
6594 * Inherited from caller.
6596 int ata_port_start(struct ata_port
*ap
)
6598 struct device
*dev
= ap
->dev
;
6601 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6606 rc
= ata_pad_alloc(ap
, dev
);
6610 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6611 (unsigned long long)ap
->prd_dma
);
6616 * ata_dev_init - Initialize an ata_device structure
6617 * @dev: Device structure to initialize
6619 * Initialize @dev in preparation for probing.
6622 * Inherited from caller.
6624 void ata_dev_init(struct ata_device
*dev
)
6626 struct ata_link
*link
= dev
->link
;
6627 struct ata_port
*ap
= link
->ap
;
6628 unsigned long flags
;
6630 /* SATA spd limit is bound to the first device */
6631 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6634 /* High bits of dev->flags are used to record warm plug
6635 * requests which occur asynchronously. Synchronize using
6638 spin_lock_irqsave(ap
->lock
, flags
);
6639 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6641 spin_unlock_irqrestore(ap
->lock
, flags
);
6643 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6644 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6645 dev
->pio_mask
= UINT_MAX
;
6646 dev
->mwdma_mask
= UINT_MAX
;
6647 dev
->udma_mask
= UINT_MAX
;
6651 * ata_link_init - Initialize an ata_link structure
6652 * @ap: ATA port link is attached to
6653 * @link: Link structure to initialize
6654 * @pmp: Port multiplier port number
6659 * Kernel thread context (may sleep)
6661 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6665 /* clear everything except for devices */
6666 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6670 link
->active_tag
= ATA_TAG_POISON
;
6671 link
->hw_sata_spd_limit
= UINT_MAX
;
6673 /* can't use iterator, ap isn't initialized yet */
6674 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6675 struct ata_device
*dev
= &link
->device
[i
];
6678 dev
->devno
= dev
- link
->device
;
6684 * sata_link_init_spd - Initialize link->sata_spd_limit
6685 * @link: Link to configure sata_spd_limit for
6687 * Initialize @link->[hw_]sata_spd_limit to the currently
6691 * Kernel thread context (may sleep).
6694 * 0 on success, -errno on failure.
6696 int sata_link_init_spd(struct ata_link
*link
)
6701 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6705 spd
= (scontrol
>> 4) & 0xf;
6707 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6709 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6715 * ata_port_alloc - allocate and initialize basic ATA port resources
6716 * @host: ATA host this allocated port belongs to
6718 * Allocate and initialize basic ATA port resources.
6721 * Allocate ATA port on success, NULL on failure.
6724 * Inherited from calling layer (may sleep).
6726 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6728 struct ata_port
*ap
;
6732 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6736 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6737 ap
->lock
= &host
->lock
;
6738 ap
->flags
= ATA_FLAG_DISABLED
;
6740 ap
->ctl
= ATA_DEVCTL_OBS
;
6742 ap
->dev
= host
->dev
;
6743 ap
->last_ctl
= 0xFF;
6745 #if defined(ATA_VERBOSE_DEBUG)
6746 /* turn on all debugging levels */
6747 ap
->msg_enable
= 0x00FF;
6748 #elif defined(ATA_DEBUG)
6749 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6751 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6754 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6755 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6756 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6757 INIT_LIST_HEAD(&ap
->eh_done_q
);
6758 init_waitqueue_head(&ap
->eh_wait_q
);
6759 init_timer_deferrable(&ap
->fastdrain_timer
);
6760 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6761 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6763 ap
->cbl
= ATA_CBL_NONE
;
6765 ata_link_init(ap
, &ap
->link
, 0);
6768 ap
->stats
.unhandled_irq
= 1;
6769 ap
->stats
.idle_irq
= 1;
6774 static void ata_host_release(struct device
*gendev
, void *res
)
6776 struct ata_host
*host
= dev_get_drvdata(gendev
);
6779 for (i
= 0; i
< host
->n_ports
; i
++) {
6780 struct ata_port
*ap
= host
->ports
[i
];
6785 if ((host
->flags
& ATA_HOST_STARTED
) && ap
->ops
->port_stop
)
6786 ap
->ops
->port_stop(ap
);
6789 if ((host
->flags
& ATA_HOST_STARTED
) && host
->ops
->host_stop
)
6790 host
->ops
->host_stop(host
);
6792 for (i
= 0; i
< host
->n_ports
; i
++) {
6793 struct ata_port
*ap
= host
->ports
[i
];
6799 scsi_host_put(ap
->scsi_host
);
6801 kfree(ap
->pmp_link
);
6803 host
->ports
[i
] = NULL
;
6806 dev_set_drvdata(gendev
, NULL
);
6810 * ata_host_alloc - allocate and init basic ATA host resources
6811 * @dev: generic device this host is associated with
6812 * @max_ports: maximum number of ATA ports associated with this host
6814 * Allocate and initialize basic ATA host resources. LLD calls
6815 * this function to allocate a host, initializes it fully and
6816 * attaches it using ata_host_register().
6818 * @max_ports ports are allocated and host->n_ports is
6819 * initialized to @max_ports. The caller is allowed to decrease
6820 * host->n_ports before calling ata_host_register(). The unused
6821 * ports will be automatically freed on registration.
6824 * Allocate ATA host on success, NULL on failure.
6827 * Inherited from calling layer (may sleep).
6829 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6831 struct ata_host
*host
;
6837 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6840 /* alloc a container for our list of ATA ports (buses) */
6841 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6842 /* alloc a container for our list of ATA ports (buses) */
6843 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6847 devres_add(dev
, host
);
6848 dev_set_drvdata(dev
, host
);
6850 spin_lock_init(&host
->lock
);
6852 host
->n_ports
= max_ports
;
6854 /* allocate ports bound to this host */
6855 for (i
= 0; i
< max_ports
; i
++) {
6856 struct ata_port
*ap
;
6858 ap
= ata_port_alloc(host
);
6863 host
->ports
[i
] = ap
;
6866 devres_remove_group(dev
, NULL
);
6870 devres_release_group(dev
, NULL
);
6875 * ata_host_alloc_pinfo - alloc host and init with port_info array
6876 * @dev: generic device this host is associated with
6877 * @ppi: array of ATA port_info to initialize host with
6878 * @n_ports: number of ATA ports attached to this host
6880 * Allocate ATA host and initialize with info from @ppi. If NULL
6881 * terminated, @ppi may contain fewer entries than @n_ports. The
6882 * last entry will be used for the remaining ports.
6885 * Allocate ATA host on success, NULL on failure.
6888 * Inherited from calling layer (may sleep).
6890 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6891 const struct ata_port_info
* const * ppi
,
6894 const struct ata_port_info
*pi
;
6895 struct ata_host
*host
;
6898 host
= ata_host_alloc(dev
, n_ports
);
6902 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6903 struct ata_port
*ap
= host
->ports
[i
];
6908 ap
->pio_mask
= pi
->pio_mask
;
6909 ap
->mwdma_mask
= pi
->mwdma_mask
;
6910 ap
->udma_mask
= pi
->udma_mask
;
6911 ap
->flags
|= pi
->flags
;
6912 ap
->link
.flags
|= pi
->link_flags
;
6913 ap
->ops
= pi
->port_ops
;
6915 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6916 host
->ops
= pi
->port_ops
;
6917 if (!host
->private_data
&& pi
->private_data
)
6918 host
->private_data
= pi
->private_data
;
6925 * ata_host_start - start and freeze ports of an ATA host
6926 * @host: ATA host to start ports for
6928 * Start and then freeze ports of @host. Started status is
6929 * recorded in host->flags, so this function can be called
6930 * multiple times. Ports are guaranteed to get started only
6931 * once. If host->ops isn't initialized yet, its set to the
6932 * first non-dummy port ops.
6935 * Inherited from calling layer (may sleep).
6938 * 0 if all ports are started successfully, -errno otherwise.
6940 int ata_host_start(struct ata_host
*host
)
6944 if (host
->flags
& ATA_HOST_STARTED
)
6947 for (i
= 0; i
< host
->n_ports
; i
++) {
6948 struct ata_port
*ap
= host
->ports
[i
];
6950 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6951 host
->ops
= ap
->ops
;
6953 if (ap
->ops
->port_start
) {
6954 rc
= ap
->ops
->port_start(ap
);
6956 ata_port_printk(ap
, KERN_ERR
, "failed to "
6957 "start port (errno=%d)\n", rc
);
6962 ata_eh_freeze_port(ap
);
6965 host
->flags
|= ATA_HOST_STARTED
;
6970 struct ata_port
*ap
= host
->ports
[i
];
6972 if (ap
->ops
->port_stop
)
6973 ap
->ops
->port_stop(ap
);
6979 * ata_sas_host_init - Initialize a host struct
6980 * @host: host to initialize
6981 * @dev: device host is attached to
6982 * @flags: host flags
6986 * PCI/etc. bus probe sem.
6989 /* KILLME - the only user left is ipr */
6990 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
6991 unsigned long flags
, const struct ata_port_operations
*ops
)
6993 spin_lock_init(&host
->lock
);
6995 host
->flags
= flags
;
7000 * ata_host_register - register initialized ATA host
7001 * @host: ATA host to register
7002 * @sht: template for SCSI host
7004 * Register initialized ATA host. @host is allocated using
7005 * ata_host_alloc() and fully initialized by LLD. This function
7006 * starts ports, registers @host with ATA and SCSI layers and
7007 * probe registered devices.
7010 * Inherited from calling layer (may sleep).
7013 * 0 on success, -errno otherwise.
7015 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
7019 /* host must have been started */
7020 if (!(host
->flags
& ATA_HOST_STARTED
)) {
7021 dev_printk(KERN_ERR
, host
->dev
,
7022 "BUG: trying to register unstarted host\n");
7027 /* Blow away unused ports. This happens when LLD can't
7028 * determine the exact number of ports to allocate at
7031 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
7032 kfree(host
->ports
[i
]);
7034 /* give ports names and add SCSI hosts */
7035 for (i
= 0; i
< host
->n_ports
; i
++)
7036 host
->ports
[i
]->print_id
= ata_print_id
++;
7038 rc
= ata_scsi_add_hosts(host
, sht
);
7042 /* associate with ACPI nodes */
7043 ata_acpi_associate(host
);
7045 /* set cable, sata_spd_limit and report */
7046 for (i
= 0; i
< host
->n_ports
; i
++) {
7047 struct ata_port
*ap
= host
->ports
[i
];
7048 unsigned long xfer_mask
;
7050 /* set SATA cable type if still unset */
7051 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
7052 ap
->cbl
= ATA_CBL_SATA
;
7054 /* init sata_spd_limit to the current value */
7055 sata_link_init_spd(&ap
->link
);
7057 /* print per-port info to dmesg */
7058 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
7061 if (!ata_port_is_dummy(ap
)) {
7062 ata_port_printk(ap
, KERN_INFO
,
7063 "%cATA max %s %s\n",
7064 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
7065 ata_mode_string(xfer_mask
),
7066 ap
->link
.eh_info
.desc
);
7067 ata_ehi_clear_desc(&ap
->link
.eh_info
);
7069 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
7072 /* perform each probe synchronously */
7073 DPRINTK("probe begin\n");
7074 for (i
= 0; i
< host
->n_ports
; i
++) {
7075 struct ata_port
*ap
= host
->ports
[i
];
7079 if (ap
->ops
->error_handler
) {
7080 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
7081 unsigned long flags
;
7085 /* kick EH for boot probing */
7086 spin_lock_irqsave(ap
->lock
, flags
);
7089 (1 << ata_link_max_devices(&ap
->link
)) - 1;
7090 ehi
->action
|= ATA_EH_SOFTRESET
;
7091 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
7093 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
7094 ap
->pflags
|= ATA_PFLAG_LOADING
;
7095 ata_port_schedule_eh(ap
);
7097 spin_unlock_irqrestore(ap
->lock
, flags
);
7099 /* wait for EH to finish */
7100 ata_port_wait_eh(ap
);
7102 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
7103 rc
= ata_bus_probe(ap
);
7104 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
7107 /* FIXME: do something useful here?
7108 * Current libata behavior will
7109 * tear down everything when
7110 * the module is removed
7111 * or the h/w is unplugged.
7117 /* probes are done, now scan each port's disk(s) */
7118 DPRINTK("host probe begin\n");
7119 for (i
= 0; i
< host
->n_ports
; i
++) {
7120 struct ata_port
*ap
= host
->ports
[i
];
7122 ata_scsi_scan_host(ap
, 1);
7123 ata_lpm_schedule(ap
, ap
->pm_policy
);
7130 * ata_host_activate - start host, request IRQ and register it
7131 * @host: target ATA host
7132 * @irq: IRQ to request
7133 * @irq_handler: irq_handler used when requesting IRQ
7134 * @irq_flags: irq_flags used when requesting IRQ
7135 * @sht: scsi_host_template to use when registering the host
7137 * After allocating an ATA host and initializing it, most libata
7138 * LLDs perform three steps to activate the host - start host,
7139 * request IRQ and register it. This helper takes necessasry
7140 * arguments and performs the three steps in one go.
7143 * Inherited from calling layer (may sleep).
7146 * 0 on success, -errno otherwise.
7148 int ata_host_activate(struct ata_host
*host
, int irq
,
7149 irq_handler_t irq_handler
, unsigned long irq_flags
,
7150 struct scsi_host_template
*sht
)
7154 rc
= ata_host_start(host
);
7158 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
7159 dev_driver_string(host
->dev
), host
);
7163 for (i
= 0; i
< host
->n_ports
; i
++)
7164 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
7166 rc
= ata_host_register(host
, sht
);
7167 /* if failed, just free the IRQ and leave ports alone */
7169 devm_free_irq(host
->dev
, irq
, host
);
7175 * ata_port_detach - Detach ATA port in prepration of device removal
7176 * @ap: ATA port to be detached
7178 * Detach all ATA devices and the associated SCSI devices of @ap;
7179 * then, remove the associated SCSI host. @ap is guaranteed to
7180 * be quiescent on return from this function.
7183 * Kernel thread context (may sleep).
7185 static void ata_port_detach(struct ata_port
*ap
)
7187 unsigned long flags
;
7188 struct ata_link
*link
;
7189 struct ata_device
*dev
;
7191 if (!ap
->ops
->error_handler
)
7194 /* tell EH we're leaving & flush EH */
7195 spin_lock_irqsave(ap
->lock
, flags
);
7196 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7197 spin_unlock_irqrestore(ap
->lock
, flags
);
7199 ata_port_wait_eh(ap
);
7201 /* EH is now guaranteed to see UNLOADING, so no new device
7202 * will be attached. Disable all existing devices.
7204 spin_lock_irqsave(ap
->lock
, flags
);
7206 ata_port_for_each_link(link
, ap
) {
7207 ata_link_for_each_dev(dev
, link
)
7208 ata_dev_disable(dev
);
7211 spin_unlock_irqrestore(ap
->lock
, flags
);
7213 /* Final freeze & EH. All in-flight commands are aborted. EH
7214 * will be skipped and retrials will be terminated with bad
7217 spin_lock_irqsave(ap
->lock
, flags
);
7218 ata_port_freeze(ap
); /* won't be thawed */
7219 spin_unlock_irqrestore(ap
->lock
, flags
);
7221 ata_port_wait_eh(ap
);
7222 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7225 /* remove the associated SCSI host */
7226 scsi_remove_host(ap
->scsi_host
);
7230 * ata_host_detach - Detach all ports of an ATA host
7231 * @host: Host to detach
7233 * Detach all ports of @host.
7236 * Kernel thread context (may sleep).
7238 void ata_host_detach(struct ata_host
*host
)
7242 for (i
= 0; i
< host
->n_ports
; i
++)
7243 ata_port_detach(host
->ports
[i
]);
7247 * ata_std_ports - initialize ioaddr with standard port offsets.
7248 * @ioaddr: IO address structure to be initialized
7250 * Utility function which initializes data_addr, error_addr,
7251 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7252 * device_addr, status_addr, and command_addr to standard offsets
7253 * relative to cmd_addr.
7255 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7258 void ata_std_ports(struct ata_ioports
*ioaddr
)
7260 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7261 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7262 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7263 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7264 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7265 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7266 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7267 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7268 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7269 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7276 * ata_pci_remove_one - PCI layer callback for device removal
7277 * @pdev: PCI device that was removed
7279 * PCI layer indicates to libata via this hook that hot-unplug or
7280 * module unload event has occurred. Detach all ports. Resource
7281 * release is handled via devres.
7284 * Inherited from PCI layer (may sleep).
7286 void ata_pci_remove_one(struct pci_dev
*pdev
)
7288 struct device
*dev
= &pdev
->dev
;
7289 struct ata_host
*host
= dev_get_drvdata(dev
);
7291 ata_host_detach(host
);
7294 /* move to PCI subsystem */
7295 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7297 unsigned long tmp
= 0;
7299 switch (bits
->width
) {
7302 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7308 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7314 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7325 return (tmp
== bits
->val
) ? 1 : 0;
7329 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7331 pci_save_state(pdev
);
7332 pci_disable_device(pdev
);
7334 if (mesg
.event
== PM_EVENT_SUSPEND
)
7335 pci_set_power_state(pdev
, PCI_D3hot
);
7338 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7342 pci_set_power_state(pdev
, PCI_D0
);
7343 pci_restore_state(pdev
);
7345 rc
= pcim_enable_device(pdev
);
7347 dev_printk(KERN_ERR
, &pdev
->dev
,
7348 "failed to enable device after resume (%d)\n", rc
);
7352 pci_set_master(pdev
);
7356 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7358 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7361 rc
= ata_host_suspend(host
, mesg
);
7365 ata_pci_device_do_suspend(pdev
, mesg
);
7370 int ata_pci_device_resume(struct pci_dev
*pdev
)
7372 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7375 rc
= ata_pci_device_do_resume(pdev
);
7377 ata_host_resume(host
);
7380 #endif /* CONFIG_PM */
7382 #endif /* CONFIG_PCI */
7385 static int __init
ata_init(void)
7387 ata_probe_timeout
*= HZ
;
7388 ata_wq
= create_workqueue("ata");
7392 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7394 destroy_workqueue(ata_wq
);
7398 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7402 static void __exit
ata_exit(void)
7404 destroy_workqueue(ata_wq
);
7405 destroy_workqueue(ata_aux_wq
);
7408 subsys_initcall(ata_init
);
7409 module_exit(ata_exit
);
7411 static unsigned long ratelimit_time
;
7412 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7414 int ata_ratelimit(void)
7417 unsigned long flags
;
7419 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7421 if (time_after(jiffies
, ratelimit_time
)) {
7423 ratelimit_time
= jiffies
+ (HZ
/5);
7427 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7433 * ata_wait_register - wait until register value changes
7434 * @reg: IO-mapped register
7435 * @mask: Mask to apply to read register value
7436 * @val: Wait condition
7437 * @interval_msec: polling interval in milliseconds
7438 * @timeout_msec: timeout in milliseconds
7440 * Waiting for some bits of register to change is a common
7441 * operation for ATA controllers. This function reads 32bit LE
7442 * IO-mapped register @reg and tests for the following condition.
7444 * (*@reg & mask) != val
7446 * If the condition is met, it returns; otherwise, the process is
7447 * repeated after @interval_msec until timeout.
7450 * Kernel thread context (may sleep)
7453 * The final register value.
7455 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7456 unsigned long interval_msec
,
7457 unsigned long timeout_msec
)
7459 unsigned long timeout
;
7462 tmp
= ioread32(reg
);
7464 /* Calculate timeout _after_ the first read to make sure
7465 * preceding writes reach the controller before starting to
7466 * eat away the timeout.
7468 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7470 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7471 msleep(interval_msec
);
7472 tmp
= ioread32(reg
);
7481 static void ata_dummy_noret(struct ata_port
*ap
) { }
7482 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7483 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7485 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7490 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7492 return AC_ERR_SYSTEM
;
7495 const struct ata_port_operations ata_dummy_port_ops
= {
7496 .check_status
= ata_dummy_check_status
,
7497 .check_altstatus
= ata_dummy_check_status
,
7498 .dev_select
= ata_noop_dev_select
,
7499 .qc_prep
= ata_noop_qc_prep
,
7500 .qc_issue
= ata_dummy_qc_issue
,
7501 .freeze
= ata_dummy_noret
,
7502 .thaw
= ata_dummy_noret
,
7503 .error_handler
= ata_dummy_noret
,
7504 .post_internal_cmd
= ata_dummy_qc_noret
,
7505 .irq_clear
= ata_dummy_noret
,
7506 .port_start
= ata_dummy_ret0
,
7507 .port_stop
= ata_dummy_noret
,
7510 const struct ata_port_info ata_dummy_port_info
= {
7511 .port_ops
= &ata_dummy_port_ops
,
7515 * libata is essentially a library of internal helper functions for
7516 * low-level ATA host controller drivers. As such, the API/ABI is
7517 * likely to change as new drivers are added and updated.
7518 * Do not depend on ABI/API stability.
7520 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7521 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7522 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7523 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7524 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7525 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7526 EXPORT_SYMBOL_GPL(ata_std_ports
);
7527 EXPORT_SYMBOL_GPL(ata_host_init
);
7528 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7529 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7530 EXPORT_SYMBOL_GPL(ata_host_start
);
7531 EXPORT_SYMBOL_GPL(ata_host_register
);
7532 EXPORT_SYMBOL_GPL(ata_host_activate
);
7533 EXPORT_SYMBOL_GPL(ata_host_detach
);
7534 EXPORT_SYMBOL_GPL(ata_sg_init
);
7535 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7536 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7537 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7538 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7539 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7540 EXPORT_SYMBOL_GPL(ata_tf_load
);
7541 EXPORT_SYMBOL_GPL(ata_tf_read
);
7542 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7543 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7544 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7545 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7546 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7547 EXPORT_SYMBOL_GPL(ata_check_status
);
7548 EXPORT_SYMBOL_GPL(ata_altstatus
);
7549 EXPORT_SYMBOL_GPL(ata_exec_command
);
7550 EXPORT_SYMBOL_GPL(ata_port_start
);
7551 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7552 EXPORT_SYMBOL_GPL(ata_interrupt
);
7553 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7554 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7555 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7556 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7557 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7558 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7559 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7560 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7561 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7562 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7563 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7564 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7565 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7566 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7567 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7568 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7569 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7570 EXPORT_SYMBOL_GPL(ata_port_probe
);
7571 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7572 EXPORT_SYMBOL_GPL(sata_set_spd
);
7573 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7574 EXPORT_SYMBOL_GPL(sata_link_resume
);
7575 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7576 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7577 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7578 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7579 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7580 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7581 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7582 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7583 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7584 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7585 EXPORT_SYMBOL_GPL(ata_port_disable
);
7586 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7587 EXPORT_SYMBOL_GPL(ata_wait_register
);
7588 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7589 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7590 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7591 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7592 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7593 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7594 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7595 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7596 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7597 EXPORT_SYMBOL_GPL(ata_host_intr
);
7598 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7599 EXPORT_SYMBOL_GPL(sata_scr_read
);
7600 EXPORT_SYMBOL_GPL(sata_scr_write
);
7601 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7602 EXPORT_SYMBOL_GPL(ata_link_online
);
7603 EXPORT_SYMBOL_GPL(ata_link_offline
);
7605 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7606 EXPORT_SYMBOL_GPL(ata_host_resume
);
7607 #endif /* CONFIG_PM */
7608 EXPORT_SYMBOL_GPL(ata_id_string
);
7609 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7610 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7611 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7613 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7614 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7615 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7618 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7619 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7620 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7621 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7622 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7623 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7625 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7626 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7627 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7628 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7629 #endif /* CONFIG_PM */
7630 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7631 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7632 #endif /* CONFIG_PCI */
7634 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7635 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7636 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7637 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7638 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7640 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7641 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7642 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7643 EXPORT_SYMBOL_GPL(ata_port_desc
);
7645 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7646 #endif /* CONFIG_PCI */
7647 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7648 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7649 EXPORT_SYMBOL_GPL(ata_link_abort
);
7650 EXPORT_SYMBOL_GPL(ata_port_abort
);
7651 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7652 EXPORT_SYMBOL_GPL(sata_async_notification
);
7653 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7654 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7655 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7656 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7657 EXPORT_SYMBOL_GPL(ata_do_eh
);
7658 EXPORT_SYMBOL_GPL(ata_irq_on
);
7659 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7661 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7662 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7663 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7664 EXPORT_SYMBOL_GPL(ata_cable_sata
);