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 * we don't have to disable DIPM since IPM flags
681 * disallow transitions to SLUMBER, which effectively
682 * disable DIPM if it does not support PARTIAL
686 case MAX_PERFORMANCE
:
687 /* disable all IPM transitions */
688 scontrol
|= (0x3 << 8);
689 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
694 * we don't have to disable DIPM since IPM flags
695 * disallow all transitions which effectively
696 * disable DIPM anyway.
701 /* FIXME: handle SET FEATURES failure */
708 * ata_dev_enable_pm - enable SATA interface power management
709 * @dev: device to enable power management
710 * @policy: the link power management policy
712 * Enable SATA Interface power management. This will enable
713 * Device Interface Power Management (DIPM) for min_power
714 * policy, and then call driver specific callbacks for
715 * enabling Host Initiated Power management.
718 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
720 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
723 struct ata_port
*ap
= dev
->link
->ap
;
725 /* set HIPM first, then DIPM */
726 if (ap
->ops
->enable_pm
)
727 rc
= ap
->ops
->enable_pm(ap
, policy
);
730 rc
= ata_dev_set_dipm(dev
, policy
);
734 ap
->pm_policy
= MAX_PERFORMANCE
;
736 ap
->pm_policy
= policy
;
737 return /* rc */; /* hopefully we can use 'rc' eventually */
742 * ata_dev_disable_pm - disable SATA interface power management
743 * @dev: device to disable power management
745 * Disable SATA Interface power management. This will disable
746 * Device Interface Power Management (DIPM) without changing
747 * policy, call driver specific callbacks for disabling Host
748 * Initiated Power management.
753 static void ata_dev_disable_pm(struct ata_device
*dev
)
755 struct ata_port
*ap
= dev
->link
->ap
;
757 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
758 if (ap
->ops
->disable_pm
)
759 ap
->ops
->disable_pm(ap
);
761 #endif /* CONFIG_PM */
763 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
765 ap
->pm_policy
= policy
;
766 ap
->link
.eh_info
.action
|= ATA_EHI_LPM
;
767 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
768 ata_port_schedule_eh(ap
);
772 static void ata_lpm_enable(struct ata_host
*host
)
774 struct ata_link
*link
;
776 struct ata_device
*dev
;
779 for (i
= 0; i
< host
->n_ports
; i
++) {
781 ata_port_for_each_link(link
, ap
) {
782 ata_link_for_each_dev(dev
, link
)
783 ata_dev_disable_pm(dev
);
788 static void ata_lpm_disable(struct ata_host
*host
)
792 for (i
= 0; i
< host
->n_ports
; i
++) {
793 struct ata_port
*ap
= host
->ports
[i
];
794 ata_lpm_schedule(ap
, ap
->pm_policy
);
797 #endif /* CONFIG_PM */
801 * ata_devchk - PATA device presence detection
802 * @ap: ATA channel to examine
803 * @device: Device to examine (starting at zero)
805 * This technique was originally described in
806 * Hale Landis's ATADRVR (www.ata-atapi.com), and
807 * later found its way into the ATA/ATAPI spec.
809 * Write a pattern to the ATA shadow registers,
810 * and if a device is present, it will respond by
811 * correctly storing and echoing back the
812 * ATA shadow register contents.
818 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
820 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
823 ap
->ops
->dev_select(ap
, device
);
825 iowrite8(0x55, ioaddr
->nsect_addr
);
826 iowrite8(0xaa, ioaddr
->lbal_addr
);
828 iowrite8(0xaa, ioaddr
->nsect_addr
);
829 iowrite8(0x55, ioaddr
->lbal_addr
);
831 iowrite8(0x55, ioaddr
->nsect_addr
);
832 iowrite8(0xaa, ioaddr
->lbal_addr
);
834 nsect
= ioread8(ioaddr
->nsect_addr
);
835 lbal
= ioread8(ioaddr
->lbal_addr
);
837 if ((nsect
== 0x55) && (lbal
== 0xaa))
838 return 1; /* we found a device */
840 return 0; /* nothing found */
844 * ata_dev_classify - determine device type based on ATA-spec signature
845 * @tf: ATA taskfile register set for device to be identified
847 * Determine from taskfile register contents whether a device is
848 * ATA or ATAPI, as per "Signature and persistence" section
849 * of ATA/PI spec (volume 1, sect 5.14).
855 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
856 * %ATA_DEV_UNKNOWN the event of failure.
858 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
860 /* Apple's open source Darwin code hints that some devices only
861 * put a proper signature into the LBA mid/high registers,
862 * So, we only check those. It's sufficient for uniqueness.
864 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
865 * signatures for ATA and ATAPI devices attached on SerialATA,
866 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
867 * spec has never mentioned about using different signatures
868 * for ATA/ATAPI devices. Then, Serial ATA II: Port
869 * Multiplier specification began to use 0x69/0x96 to identify
870 * port multpliers and 0x3c/0xc3 to identify SEMB device.
871 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
872 * 0x69/0x96 shortly and described them as reserved for
875 * We follow the current spec and consider that 0x69/0x96
876 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
878 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
879 DPRINTK("found ATA device by sig\n");
883 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
884 DPRINTK("found ATAPI device by sig\n");
885 return ATA_DEV_ATAPI
;
888 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
889 DPRINTK("found PMP device by sig\n");
893 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
894 printk(KERN_INFO
"ata: SEMB device ignored\n");
895 return ATA_DEV_SEMB_UNSUP
; /* not yet */
898 DPRINTK("unknown device\n");
899 return ATA_DEV_UNKNOWN
;
903 * ata_dev_try_classify - Parse returned ATA device signature
904 * @dev: ATA device to classify (starting at zero)
905 * @present: device seems present
906 * @r_err: Value of error register on completion
908 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
909 * an ATA/ATAPI-defined set of values is placed in the ATA
910 * shadow registers, indicating the results of device detection
913 * Select the ATA device, and read the values from the ATA shadow
914 * registers. Then parse according to the Error register value,
915 * and the spec-defined values examined by ata_dev_classify().
921 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
923 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
926 struct ata_port
*ap
= dev
->link
->ap
;
927 struct ata_taskfile tf
;
931 ap
->ops
->dev_select(ap
, dev
->devno
);
933 memset(&tf
, 0, sizeof(tf
));
935 ap
->ops
->tf_read(ap
, &tf
);
940 /* see if device passed diags: if master then continue and warn later */
941 if (err
== 0 && dev
->devno
== 0)
942 /* diagnostic fail : do nothing _YET_ */
943 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
946 else if ((dev
->devno
== 0) && (err
== 0x81))
951 /* determine if device is ATA or ATAPI */
952 class = ata_dev_classify(&tf
);
954 if (class == ATA_DEV_UNKNOWN
) {
955 /* If the device failed diagnostic, it's likely to
956 * have reported incorrect device signature too.
957 * Assume ATA device if the device seems present but
958 * device signature is invalid with diagnostic
961 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
964 class = ATA_DEV_NONE
;
965 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
966 class = ATA_DEV_NONE
;
972 * ata_id_string - Convert IDENTIFY DEVICE page into string
973 * @id: IDENTIFY DEVICE results we will examine
974 * @s: string into which data is output
975 * @ofs: offset into identify device page
976 * @len: length of string to return. must be an even number.
978 * The strings in the IDENTIFY DEVICE page are broken up into
979 * 16-bit chunks. Run through the string, and output each
980 * 8-bit chunk linearly, regardless of platform.
986 void ata_id_string(const u16
*id
, unsigned char *s
,
987 unsigned int ofs
, unsigned int len
)
1006 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1007 * @id: IDENTIFY DEVICE results we will examine
1008 * @s: string into which data is output
1009 * @ofs: offset into identify device page
1010 * @len: length of string to return. must be an odd number.
1012 * This function is identical to ata_id_string except that it
1013 * trims trailing spaces and terminates the resulting string with
1014 * null. @len must be actual maximum length (even number) + 1.
1019 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1020 unsigned int ofs
, unsigned int len
)
1024 WARN_ON(!(len
& 1));
1026 ata_id_string(id
, s
, ofs
, len
- 1);
1028 p
= s
+ strnlen(s
, len
- 1);
1029 while (p
> s
&& p
[-1] == ' ')
1034 static u64
ata_id_n_sectors(const u16
*id
)
1036 if (ata_id_has_lba(id
)) {
1037 if (ata_id_has_lba48(id
))
1038 return ata_id_u64(id
, 100);
1040 return ata_id_u32(id
, 60);
1042 if (ata_id_current_chs_valid(id
))
1043 return ata_id_u32(id
, 57);
1045 return id
[1] * id
[3] * id
[6];
1049 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
1053 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1054 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1055 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1056 sectors
|= (tf
->lbah
& 0xff) << 16;
1057 sectors
|= (tf
->lbam
& 0xff) << 8;
1058 sectors
|= (tf
->lbal
& 0xff);
1063 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
1067 sectors
|= (tf
->device
& 0x0f) << 24;
1068 sectors
|= (tf
->lbah
& 0xff) << 16;
1069 sectors
|= (tf
->lbam
& 0xff) << 8;
1070 sectors
|= (tf
->lbal
& 0xff);
1076 * ata_read_native_max_address - Read native max address
1077 * @dev: target device
1078 * @max_sectors: out parameter for the result native max address
1080 * Perform an LBA48 or LBA28 native size query upon the device in
1084 * 0 on success, -EACCES if command is aborted by the drive.
1085 * -EIO on other errors.
1087 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1089 unsigned int err_mask
;
1090 struct ata_taskfile tf
;
1091 int lba48
= ata_id_has_lba48(dev
->id
);
1093 ata_tf_init(dev
, &tf
);
1095 /* always clear all address registers */
1096 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1099 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1100 tf
.flags
|= ATA_TFLAG_LBA48
;
1102 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1104 tf
.protocol
|= ATA_PROT_NODATA
;
1105 tf
.device
|= ATA_LBA
;
1107 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1109 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1110 "max address (err_mask=0x%x)\n", err_mask
);
1111 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1117 *max_sectors
= ata_tf_to_lba48(&tf
);
1119 *max_sectors
= ata_tf_to_lba(&tf
);
1120 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1126 * ata_set_max_sectors - Set max sectors
1127 * @dev: target device
1128 * @new_sectors: new max sectors value to set for the device
1130 * Set max sectors of @dev to @new_sectors.
1133 * 0 on success, -EACCES if command is aborted or denied (due to
1134 * previous non-volatile SET_MAX) by the drive. -EIO on other
1137 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1139 unsigned int err_mask
;
1140 struct ata_taskfile tf
;
1141 int lba48
= ata_id_has_lba48(dev
->id
);
1145 ata_tf_init(dev
, &tf
);
1147 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1150 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1151 tf
.flags
|= ATA_TFLAG_LBA48
;
1153 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1154 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1155 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1157 tf
.command
= ATA_CMD_SET_MAX
;
1159 tf
.device
|= (new_sectors
>> 24) & 0xf;
1162 tf
.protocol
|= ATA_PROT_NODATA
;
1163 tf
.device
|= ATA_LBA
;
1165 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1166 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1167 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1169 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1171 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1172 "max address (err_mask=0x%x)\n", err_mask
);
1173 if (err_mask
== AC_ERR_DEV
&&
1174 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1183 * ata_hpa_resize - Resize a device with an HPA set
1184 * @dev: Device to resize
1186 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1187 * it if required to the full size of the media. The caller must check
1188 * the drive has the HPA feature set enabled.
1191 * 0 on success, -errno on failure.
1193 static int ata_hpa_resize(struct ata_device
*dev
)
1195 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1196 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1197 u64 sectors
= ata_id_n_sectors(dev
->id
);
1201 /* do we need to do it? */
1202 if (dev
->class != ATA_DEV_ATA
||
1203 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1204 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1207 /* read native max address */
1208 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1210 /* If HPA isn't going to be unlocked, skip HPA
1211 * resizing from the next try.
1213 if (!ata_ignore_hpa
) {
1214 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1215 "broken, will skip HPA handling\n");
1216 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1218 /* we can continue if device aborted the command */
1226 /* nothing to do? */
1227 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1228 if (!print_info
|| native_sectors
== sectors
)
1231 if (native_sectors
> sectors
)
1232 ata_dev_printk(dev
, KERN_INFO
,
1233 "HPA detected: current %llu, native %llu\n",
1234 (unsigned long long)sectors
,
1235 (unsigned long long)native_sectors
);
1236 else if (native_sectors
< sectors
)
1237 ata_dev_printk(dev
, KERN_WARNING
,
1238 "native sectors (%llu) is smaller than "
1240 (unsigned long long)native_sectors
,
1241 (unsigned long long)sectors
);
1245 /* let's unlock HPA */
1246 rc
= ata_set_max_sectors(dev
, native_sectors
);
1247 if (rc
== -EACCES
) {
1248 /* if device aborted the command, skip HPA resizing */
1249 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1250 "(%llu -> %llu), skipping HPA handling\n",
1251 (unsigned long long)sectors
,
1252 (unsigned long long)native_sectors
);
1253 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1258 /* re-read IDENTIFY data */
1259 rc
= ata_dev_reread_id(dev
, 0);
1261 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1262 "data after HPA resizing\n");
1267 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1268 ata_dev_printk(dev
, KERN_INFO
,
1269 "HPA unlocked: %llu -> %llu, native %llu\n",
1270 (unsigned long long)sectors
,
1271 (unsigned long long)new_sectors
,
1272 (unsigned long long)native_sectors
);
1279 * ata_id_to_dma_mode - Identify DMA mode from id block
1280 * @dev: device to identify
1281 * @unknown: mode to assume if we cannot tell
1283 * Set up the timing values for the device based upon the identify
1284 * reported values for the DMA mode. This function is used by drivers
1285 * which rely upon firmware configured modes, but wish to report the
1286 * mode correctly when possible.
1288 * In addition we emit similarly formatted messages to the default
1289 * ata_dev_set_mode handler, in order to provide consistency of
1293 void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
)
1298 /* Pack the DMA modes */
1299 mask
= ((dev
->id
[63] >> 8) << ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
;
1300 if (dev
->id
[53] & 0x04)
1301 mask
|= ((dev
->id
[88] >> 8) << ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
;
1303 /* Select the mode in use */
1304 mode
= ata_xfer_mask2mode(mask
);
1307 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
1308 ata_mode_string(mask
));
1310 /* SWDMA perhaps ? */
1312 ata_dev_printk(dev
, KERN_INFO
, "configured for DMA\n");
1315 /* Configure the device reporting */
1316 dev
->xfer_mode
= mode
;
1317 dev
->xfer_shift
= ata_xfer_mode2shift(mode
);
1321 * ata_noop_dev_select - Select device 0/1 on ATA bus
1322 * @ap: ATA channel to manipulate
1323 * @device: ATA device (numbered from zero) to select
1325 * This function performs no actual function.
1327 * May be used as the dev_select() entry in ata_port_operations.
1332 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1338 * ata_std_dev_select - Select device 0/1 on ATA bus
1339 * @ap: ATA channel to manipulate
1340 * @device: ATA device (numbered from zero) to select
1342 * Use the method defined in the ATA specification to
1343 * make either device 0, or device 1, active on the
1344 * ATA channel. Works with both PIO and MMIO.
1346 * May be used as the dev_select() entry in ata_port_operations.
1352 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1357 tmp
= ATA_DEVICE_OBS
;
1359 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1361 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1362 ata_pause(ap
); /* needed; also flushes, for mmio */
1366 * ata_dev_select - Select device 0/1 on ATA bus
1367 * @ap: ATA channel to manipulate
1368 * @device: ATA device (numbered from zero) to select
1369 * @wait: non-zero to wait for Status register BSY bit to clear
1370 * @can_sleep: non-zero if context allows sleeping
1372 * Use the method defined in the ATA specification to
1373 * make either device 0, or device 1, active on the
1376 * This is a high-level version of ata_std_dev_select(),
1377 * which additionally provides the services of inserting
1378 * the proper pauses and status polling, where needed.
1384 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1385 unsigned int wait
, unsigned int can_sleep
)
1387 if (ata_msg_probe(ap
))
1388 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1389 "device %u, wait %u\n", device
, wait
);
1394 ap
->ops
->dev_select(ap
, device
);
1397 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1404 * ata_dump_id - IDENTIFY DEVICE info debugging output
1405 * @id: IDENTIFY DEVICE page to dump
1407 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1414 static inline void ata_dump_id(const u16
*id
)
1416 DPRINTK("49==0x%04x "
1426 DPRINTK("80==0x%04x "
1436 DPRINTK("88==0x%04x "
1443 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1444 * @id: IDENTIFY data to compute xfer mask from
1446 * Compute the xfermask for this device. This is not as trivial
1447 * as it seems if we must consider early devices correctly.
1449 * FIXME: pre IDE drive timing (do we care ?).
1457 static unsigned int ata_id_xfermask(const u16
*id
)
1459 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
1461 /* Usual case. Word 53 indicates word 64 is valid */
1462 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1463 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1467 /* If word 64 isn't valid then Word 51 high byte holds
1468 * the PIO timing number for the maximum. Turn it into
1471 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1472 if (mode
< 5) /* Valid PIO range */
1473 pio_mask
= (2 << mode
) - 1;
1477 /* But wait.. there's more. Design your standards by
1478 * committee and you too can get a free iordy field to
1479 * process. However its the speeds not the modes that
1480 * are supported... Note drivers using the timing API
1481 * will get this right anyway
1485 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1487 if (ata_id_is_cfa(id
)) {
1489 * Process compact flash extended modes
1491 int pio
= id
[163] & 0x7;
1492 int dma
= (id
[163] >> 3) & 7;
1495 pio_mask
|= (1 << 5);
1497 pio_mask
|= (1 << 6);
1499 mwdma_mask
|= (1 << 3);
1501 mwdma_mask
|= (1 << 4);
1505 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1506 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1508 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1512 * ata_port_queue_task - Queue port_task
1513 * @ap: The ata_port to queue port_task for
1514 * @fn: workqueue function to be scheduled
1515 * @data: data for @fn to use
1516 * @delay: delay time for workqueue function
1518 * Schedule @fn(@data) for execution after @delay jiffies using
1519 * port_task. There is one port_task per port and it's the
1520 * user(low level driver)'s responsibility to make sure that only
1521 * one task is active at any given time.
1523 * libata core layer takes care of synchronization between
1524 * port_task and EH. ata_port_queue_task() may be ignored for EH
1528 * Inherited from caller.
1530 void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
, void *data
,
1531 unsigned long delay
)
1533 PREPARE_DELAYED_WORK(&ap
->port_task
, fn
);
1534 ap
->port_task_data
= data
;
1536 /* may fail if ata_port_flush_task() in progress */
1537 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1541 * ata_port_flush_task - Flush port_task
1542 * @ap: The ata_port to flush port_task for
1544 * After this function completes, port_task is guranteed not to
1545 * be running or scheduled.
1548 * Kernel thread context (may sleep)
1550 void ata_port_flush_task(struct ata_port
*ap
)
1554 cancel_rearming_delayed_work(&ap
->port_task
);
1556 if (ata_msg_ctl(ap
))
1557 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1560 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1562 struct completion
*waiting
= qc
->private_data
;
1568 * ata_exec_internal_sg - execute libata internal command
1569 * @dev: Device to which the command is sent
1570 * @tf: Taskfile registers for the command and the result
1571 * @cdb: CDB for packet command
1572 * @dma_dir: Data tranfer direction of the command
1573 * @sgl: sg list for the data buffer of the command
1574 * @n_elem: Number of sg entries
1575 * @timeout: Timeout in msecs (0 for default)
1577 * Executes libata internal command with timeout. @tf contains
1578 * command on entry and result on return. Timeout and error
1579 * conditions are reported via return value. No recovery action
1580 * is taken after a command times out. It's caller's duty to
1581 * clean up after timeout.
1584 * None. Should be called with kernel context, might sleep.
1587 * Zero on success, AC_ERR_* mask on failure
1589 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1590 struct ata_taskfile
*tf
, const u8
*cdb
,
1591 int dma_dir
, struct scatterlist
*sgl
,
1592 unsigned int n_elem
, unsigned long timeout
)
1594 struct ata_link
*link
= dev
->link
;
1595 struct ata_port
*ap
= link
->ap
;
1596 u8 command
= tf
->command
;
1597 struct ata_queued_cmd
*qc
;
1598 unsigned int tag
, preempted_tag
;
1599 u32 preempted_sactive
, preempted_qc_active
;
1600 int preempted_nr_active_links
;
1601 DECLARE_COMPLETION_ONSTACK(wait
);
1602 unsigned long flags
;
1603 unsigned int err_mask
;
1606 spin_lock_irqsave(ap
->lock
, flags
);
1608 /* no internal command while frozen */
1609 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1610 spin_unlock_irqrestore(ap
->lock
, flags
);
1611 return AC_ERR_SYSTEM
;
1614 /* initialize internal qc */
1616 /* XXX: Tag 0 is used for drivers with legacy EH as some
1617 * drivers choke if any other tag is given. This breaks
1618 * ata_tag_internal() test for those drivers. Don't use new
1619 * EH stuff without converting to it.
1621 if (ap
->ops
->error_handler
)
1622 tag
= ATA_TAG_INTERNAL
;
1626 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1628 qc
= __ata_qc_from_tag(ap
, tag
);
1636 preempted_tag
= link
->active_tag
;
1637 preempted_sactive
= link
->sactive
;
1638 preempted_qc_active
= ap
->qc_active
;
1639 preempted_nr_active_links
= ap
->nr_active_links
;
1640 link
->active_tag
= ATA_TAG_POISON
;
1643 ap
->nr_active_links
= 0;
1645 /* prepare & issue qc */
1648 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1649 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1650 qc
->dma_dir
= dma_dir
;
1651 if (dma_dir
!= DMA_NONE
) {
1652 unsigned int i
, buflen
= 0;
1653 struct scatterlist
*sg
;
1655 for_each_sg(sgl
, sg
, n_elem
, i
)
1656 buflen
+= sg
->length
;
1658 ata_sg_init(qc
, sgl
, n_elem
);
1659 qc
->nbytes
= buflen
;
1662 qc
->private_data
= &wait
;
1663 qc
->complete_fn
= ata_qc_complete_internal
;
1667 spin_unlock_irqrestore(ap
->lock
, flags
);
1670 timeout
= ata_probe_timeout
* 1000 / HZ
;
1672 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1674 ata_port_flush_task(ap
);
1677 spin_lock_irqsave(ap
->lock
, flags
);
1679 /* We're racing with irq here. If we lose, the
1680 * following test prevents us from completing the qc
1681 * twice. If we win, the port is frozen and will be
1682 * cleaned up by ->post_internal_cmd().
1684 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1685 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1687 if (ap
->ops
->error_handler
)
1688 ata_port_freeze(ap
);
1690 ata_qc_complete(qc
);
1692 if (ata_msg_warn(ap
))
1693 ata_dev_printk(dev
, KERN_WARNING
,
1694 "qc timeout (cmd 0x%x)\n", command
);
1697 spin_unlock_irqrestore(ap
->lock
, flags
);
1700 /* do post_internal_cmd */
1701 if (ap
->ops
->post_internal_cmd
)
1702 ap
->ops
->post_internal_cmd(qc
);
1704 /* perform minimal error analysis */
1705 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1706 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1707 qc
->err_mask
|= AC_ERR_DEV
;
1710 qc
->err_mask
|= AC_ERR_OTHER
;
1712 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1713 qc
->err_mask
&= ~AC_ERR_OTHER
;
1717 spin_lock_irqsave(ap
->lock
, flags
);
1719 *tf
= qc
->result_tf
;
1720 err_mask
= qc
->err_mask
;
1723 link
->active_tag
= preempted_tag
;
1724 link
->sactive
= preempted_sactive
;
1725 ap
->qc_active
= preempted_qc_active
;
1726 ap
->nr_active_links
= preempted_nr_active_links
;
1728 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1729 * Until those drivers are fixed, we detect the condition
1730 * here, fail the command with AC_ERR_SYSTEM and reenable the
1733 * Note that this doesn't change any behavior as internal
1734 * command failure results in disabling the device in the
1735 * higher layer for LLDDs without new reset/EH callbacks.
1737 * Kill the following code as soon as those drivers are fixed.
1739 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1740 err_mask
|= AC_ERR_SYSTEM
;
1744 spin_unlock_irqrestore(ap
->lock
, flags
);
1750 * ata_exec_internal - execute libata internal command
1751 * @dev: Device to which the command is sent
1752 * @tf: Taskfile registers for the command and the result
1753 * @cdb: CDB for packet command
1754 * @dma_dir: Data tranfer direction of the command
1755 * @buf: Data buffer of the command
1756 * @buflen: Length of data buffer
1757 * @timeout: Timeout in msecs (0 for default)
1759 * Wrapper around ata_exec_internal_sg() which takes simple
1760 * buffer instead of sg list.
1763 * None. Should be called with kernel context, might sleep.
1766 * Zero on success, AC_ERR_* mask on failure
1768 unsigned ata_exec_internal(struct ata_device
*dev
,
1769 struct ata_taskfile
*tf
, const u8
*cdb
,
1770 int dma_dir
, void *buf
, unsigned int buflen
,
1771 unsigned long timeout
)
1773 struct scatterlist
*psg
= NULL
, sg
;
1774 unsigned int n_elem
= 0;
1776 if (dma_dir
!= DMA_NONE
) {
1778 sg_init_one(&sg
, buf
, buflen
);
1783 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1788 * ata_do_simple_cmd - execute simple internal command
1789 * @dev: Device to which the command is sent
1790 * @cmd: Opcode to execute
1792 * Execute a 'simple' command, that only consists of the opcode
1793 * 'cmd' itself, without filling any other registers
1796 * Kernel thread context (may sleep).
1799 * Zero on success, AC_ERR_* mask on failure
1801 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1803 struct ata_taskfile tf
;
1805 ata_tf_init(dev
, &tf
);
1808 tf
.flags
|= ATA_TFLAG_DEVICE
;
1809 tf
.protocol
= ATA_PROT_NODATA
;
1811 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1815 * ata_pio_need_iordy - check if iordy needed
1818 * Check if the current speed of the device requires IORDY. Used
1819 * by various controllers for chip configuration.
1822 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1824 /* Controller doesn't support IORDY. Probably a pointless check
1825 as the caller should know this */
1826 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1828 /* PIO3 and higher it is mandatory */
1829 if (adev
->pio_mode
> XFER_PIO_2
)
1831 /* We turn it on when possible */
1832 if (ata_id_has_iordy(adev
->id
))
1838 * ata_pio_mask_no_iordy - Return the non IORDY mask
1841 * Compute the highest mode possible if we are not using iordy. Return
1842 * -1 if no iordy mode is available.
1845 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1847 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1848 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1849 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1850 /* Is the speed faster than the drive allows non IORDY ? */
1852 /* This is cycle times not frequency - watch the logic! */
1853 if (pio
> 240) /* PIO2 is 240nS per cycle */
1854 return 3 << ATA_SHIFT_PIO
;
1855 return 7 << ATA_SHIFT_PIO
;
1858 return 3 << ATA_SHIFT_PIO
;
1862 * ata_dev_read_id - Read ID data from the specified device
1863 * @dev: target device
1864 * @p_class: pointer to class of the target device (may be changed)
1865 * @flags: ATA_READID_* flags
1866 * @id: buffer to read IDENTIFY data into
1868 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1869 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1870 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1871 * for pre-ATA4 drives.
1873 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1874 * now we abort if we hit that case.
1877 * Kernel thread context (may sleep)
1880 * 0 on success, -errno otherwise.
1882 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1883 unsigned int flags
, u16
*id
)
1885 struct ata_port
*ap
= dev
->link
->ap
;
1886 unsigned int class = *p_class
;
1887 struct ata_taskfile tf
;
1888 unsigned int err_mask
= 0;
1890 int may_fallback
= 1, tried_spinup
= 0;
1893 if (ata_msg_ctl(ap
))
1894 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
1896 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
1898 ata_tf_init(dev
, &tf
);
1902 tf
.command
= ATA_CMD_ID_ATA
;
1905 tf
.command
= ATA_CMD_ID_ATAPI
;
1909 reason
= "unsupported class";
1913 tf
.protocol
= ATA_PROT_PIO
;
1915 /* Some devices choke if TF registers contain garbage. Make
1916 * sure those are properly initialized.
1918 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1920 /* Device presence detection is unreliable on some
1921 * controllers. Always poll IDENTIFY if available.
1923 tf
.flags
|= ATA_TFLAG_POLLING
;
1925 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1926 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1928 if (err_mask
& AC_ERR_NODEV_HINT
) {
1929 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1930 ap
->print_id
, dev
->devno
);
1934 /* Device or controller might have reported the wrong
1935 * device class. Give a shot at the other IDENTIFY if
1936 * the current one is aborted by the device.
1939 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1942 if (class == ATA_DEV_ATA
)
1943 class = ATA_DEV_ATAPI
;
1945 class = ATA_DEV_ATA
;
1950 reason
= "I/O error";
1954 /* Falling back doesn't make sense if ID data was read
1955 * successfully at least once.
1959 swap_buf_le16(id
, ATA_ID_WORDS
);
1963 reason
= "device reports invalid type";
1965 if (class == ATA_DEV_ATA
) {
1966 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1969 if (ata_id_is_ata(id
))
1973 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1976 * Drive powered-up in standby mode, and requires a specific
1977 * SET_FEATURES spin-up subcommand before it will accept
1978 * anything other than the original IDENTIFY command.
1980 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1981 if (err_mask
&& id
[2] != 0x738c) {
1983 reason
= "SPINUP failed";
1987 * If the drive initially returned incomplete IDENTIFY info,
1988 * we now must reissue the IDENTIFY command.
1990 if (id
[2] == 0x37c8)
1994 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
1996 * The exact sequence expected by certain pre-ATA4 drives is:
1998 * IDENTIFY (optional in early ATA)
1999 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2001 * Some drives were very specific about that exact sequence.
2003 * Note that ATA4 says lba is mandatory so the second check
2004 * shoud never trigger.
2006 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2007 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2010 reason
= "INIT_DEV_PARAMS failed";
2014 /* current CHS translation info (id[53-58]) might be
2015 * changed. reread the identify device info.
2017 flags
&= ~ATA_READID_POSTRESET
;
2027 if (ata_msg_warn(ap
))
2028 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2029 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2033 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2035 struct ata_port
*ap
= dev
->link
->ap
;
2036 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2039 static void ata_dev_config_ncq(struct ata_device
*dev
,
2040 char *desc
, size_t desc_sz
)
2042 struct ata_port
*ap
= dev
->link
->ap
;
2043 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2045 if (!ata_id_has_ncq(dev
->id
)) {
2049 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2050 snprintf(desc
, desc_sz
, "NCQ (not used)");
2053 if (ap
->flags
& ATA_FLAG_NCQ
) {
2054 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2055 dev
->flags
|= ATA_DFLAG_NCQ
;
2058 if (hdepth
>= ddepth
)
2059 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2061 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2065 * ata_dev_configure - Configure the specified ATA/ATAPI device
2066 * @dev: Target device to configure
2068 * Configure @dev according to @dev->id. Generic and low-level
2069 * driver specific fixups are also applied.
2072 * Kernel thread context (may sleep)
2075 * 0 on success, -errno otherwise
2077 int ata_dev_configure(struct ata_device
*dev
)
2079 struct ata_port
*ap
= dev
->link
->ap
;
2080 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2081 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2082 const u16
*id
= dev
->id
;
2083 unsigned int xfer_mask
;
2084 char revbuf
[7]; /* XYZ-99\0 */
2085 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2086 char modelbuf
[ATA_ID_PROD_LEN
+1];
2089 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2090 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2095 if (ata_msg_probe(ap
))
2096 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
2099 dev
->horkage
|= ata_dev_blacklisted(dev
);
2101 /* let ACPI work its magic */
2102 rc
= ata_acpi_on_devcfg(dev
);
2106 /* massage HPA, do it early as it might change IDENTIFY data */
2107 rc
= ata_hpa_resize(dev
);
2111 /* print device capabilities */
2112 if (ata_msg_probe(ap
))
2113 ata_dev_printk(dev
, KERN_DEBUG
,
2114 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2115 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2117 id
[49], id
[82], id
[83], id
[84],
2118 id
[85], id
[86], id
[87], id
[88]);
2120 /* initialize to-be-configured parameters */
2121 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2122 dev
->max_sectors
= 0;
2130 * common ATA, ATAPI feature tests
2133 /* find max transfer mode; for printk only */
2134 xfer_mask
= ata_id_xfermask(id
);
2136 if (ata_msg_probe(ap
))
2139 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2140 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2143 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2146 /* ATA-specific feature tests */
2147 if (dev
->class == ATA_DEV_ATA
) {
2148 if (ata_id_is_cfa(id
)) {
2149 if (id
[162] & 1) /* CPRM may make this media unusable */
2150 ata_dev_printk(dev
, KERN_WARNING
,
2151 "supports DRM functions and may "
2152 "not be fully accessable.\n");
2153 snprintf(revbuf
, 7, "CFA");
2155 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2157 dev
->n_sectors
= ata_id_n_sectors(id
);
2159 if (dev
->id
[59] & 0x100)
2160 dev
->multi_count
= dev
->id
[59] & 0xff;
2162 if (ata_id_has_lba(id
)) {
2163 const char *lba_desc
;
2167 dev
->flags
|= ATA_DFLAG_LBA
;
2168 if (ata_id_has_lba48(id
)) {
2169 dev
->flags
|= ATA_DFLAG_LBA48
;
2172 if (dev
->n_sectors
>= (1UL << 28) &&
2173 ata_id_has_flush_ext(id
))
2174 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2178 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2180 /* print device info to dmesg */
2181 if (ata_msg_drv(ap
) && print_info
) {
2182 ata_dev_printk(dev
, KERN_INFO
,
2183 "%s: %s, %s, max %s\n",
2184 revbuf
, modelbuf
, fwrevbuf
,
2185 ata_mode_string(xfer_mask
));
2186 ata_dev_printk(dev
, KERN_INFO
,
2187 "%Lu sectors, multi %u: %s %s\n",
2188 (unsigned long long)dev
->n_sectors
,
2189 dev
->multi_count
, lba_desc
, ncq_desc
);
2194 /* Default translation */
2195 dev
->cylinders
= id
[1];
2197 dev
->sectors
= id
[6];
2199 if (ata_id_current_chs_valid(id
)) {
2200 /* Current CHS translation is valid. */
2201 dev
->cylinders
= id
[54];
2202 dev
->heads
= id
[55];
2203 dev
->sectors
= id
[56];
2206 /* print device info to dmesg */
2207 if (ata_msg_drv(ap
) && print_info
) {
2208 ata_dev_printk(dev
, KERN_INFO
,
2209 "%s: %s, %s, max %s\n",
2210 revbuf
, modelbuf
, fwrevbuf
,
2211 ata_mode_string(xfer_mask
));
2212 ata_dev_printk(dev
, KERN_INFO
,
2213 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2214 (unsigned long long)dev
->n_sectors
,
2215 dev
->multi_count
, dev
->cylinders
,
2216 dev
->heads
, dev
->sectors
);
2223 /* ATAPI-specific feature tests */
2224 else if (dev
->class == ATA_DEV_ATAPI
) {
2225 const char *cdb_intr_string
= "";
2226 const char *atapi_an_string
= "";
2229 rc
= atapi_cdb_len(id
);
2230 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2231 if (ata_msg_warn(ap
))
2232 ata_dev_printk(dev
, KERN_WARNING
,
2233 "unsupported CDB len\n");
2237 dev
->cdb_len
= (unsigned int) rc
;
2239 /* Enable ATAPI AN if both the host and device have
2240 * the support. If PMP is attached, SNTF is required
2241 * to enable ATAPI AN to discern between PHY status
2242 * changed notifications and ATAPI ANs.
2244 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2245 (!ap
->nr_pmp_links
||
2246 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2247 unsigned int err_mask
;
2249 /* issue SET feature command to turn this on */
2250 err_mask
= ata_dev_set_feature(dev
,
2251 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2253 ata_dev_printk(dev
, KERN_ERR
,
2254 "failed to enable ATAPI AN "
2255 "(err_mask=0x%x)\n", err_mask
);
2257 dev
->flags
|= ATA_DFLAG_AN
;
2258 atapi_an_string
= ", ATAPI AN";
2262 if (ata_id_cdb_intr(dev
->id
)) {
2263 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2264 cdb_intr_string
= ", CDB intr";
2267 /* print device info to dmesg */
2268 if (ata_msg_drv(ap
) && print_info
)
2269 ata_dev_printk(dev
, KERN_INFO
,
2270 "ATAPI: %s, %s, max %s%s%s\n",
2272 ata_mode_string(xfer_mask
),
2273 cdb_intr_string
, atapi_an_string
);
2276 /* determine max_sectors */
2277 dev
->max_sectors
= ATA_MAX_SECTORS
;
2278 if (dev
->flags
& ATA_DFLAG_LBA48
)
2279 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2281 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2282 if (ata_id_has_hipm(dev
->id
))
2283 dev
->flags
|= ATA_DFLAG_HIPM
;
2284 if (ata_id_has_dipm(dev
->id
))
2285 dev
->flags
|= ATA_DFLAG_DIPM
;
2288 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2289 /* Let the user know. We don't want to disallow opens for
2290 rescue purposes, or in case the vendor is just a blithering
2293 ata_dev_printk(dev
, KERN_WARNING
,
2294 "Drive reports diagnostics failure. This may indicate a drive\n");
2295 ata_dev_printk(dev
, KERN_WARNING
,
2296 "fault or invalid emulation. Contact drive vendor for information.\n");
2300 /* limit bridge transfers to udma5, 200 sectors */
2301 if (ata_dev_knobble(dev
)) {
2302 if (ata_msg_drv(ap
) && print_info
)
2303 ata_dev_printk(dev
, KERN_INFO
,
2304 "applying bridge limits\n");
2305 dev
->udma_mask
&= ATA_UDMA5
;
2306 dev
->max_sectors
= ATA_MAX_SECTORS
;
2309 if ((dev
->class == ATA_DEV_ATAPI
) &&
2310 (atapi_command_packet_set(id
) == TYPE_TAPE
))
2311 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2313 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2314 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2317 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2318 dev
->horkage
|= ATA_HORKAGE_IPM
;
2320 /* reset link pm_policy for this port to no pm */
2321 ap
->pm_policy
= MAX_PERFORMANCE
;
2324 if (ap
->ops
->dev_config
)
2325 ap
->ops
->dev_config(dev
);
2327 if (ata_msg_probe(ap
))
2328 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2329 __FUNCTION__
, ata_chk_status(ap
));
2333 if (ata_msg_probe(ap
))
2334 ata_dev_printk(dev
, KERN_DEBUG
,
2335 "%s: EXIT, err\n", __FUNCTION__
);
2340 * ata_cable_40wire - return 40 wire cable type
2343 * Helper method for drivers which want to hardwire 40 wire cable
2347 int ata_cable_40wire(struct ata_port
*ap
)
2349 return ATA_CBL_PATA40
;
2353 * ata_cable_80wire - return 80 wire cable type
2356 * Helper method for drivers which want to hardwire 80 wire cable
2360 int ata_cable_80wire(struct ata_port
*ap
)
2362 return ATA_CBL_PATA80
;
2366 * ata_cable_unknown - return unknown PATA cable.
2369 * Helper method for drivers which have no PATA cable detection.
2372 int ata_cable_unknown(struct ata_port
*ap
)
2374 return ATA_CBL_PATA_UNK
;
2378 * ata_cable_sata - return SATA cable type
2381 * Helper method for drivers which have SATA cables
2384 int ata_cable_sata(struct ata_port
*ap
)
2386 return ATA_CBL_SATA
;
2390 * ata_bus_probe - Reset and probe ATA bus
2393 * Master ATA bus probing function. Initiates a hardware-dependent
2394 * bus reset, then attempts to identify any devices found on
2398 * PCI/etc. bus probe sem.
2401 * Zero on success, negative errno otherwise.
2404 int ata_bus_probe(struct ata_port
*ap
)
2406 unsigned int classes
[ATA_MAX_DEVICES
];
2407 int tries
[ATA_MAX_DEVICES
];
2409 struct ata_device
*dev
;
2413 ata_link_for_each_dev(dev
, &ap
->link
)
2414 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2417 ata_link_for_each_dev(dev
, &ap
->link
) {
2418 /* If we issue an SRST then an ATA drive (not ATAPI)
2419 * may change configuration and be in PIO0 timing. If
2420 * we do a hard reset (or are coming from power on)
2421 * this is true for ATA or ATAPI. Until we've set a
2422 * suitable controller mode we should not touch the
2423 * bus as we may be talking too fast.
2425 dev
->pio_mode
= XFER_PIO_0
;
2427 /* If the controller has a pio mode setup function
2428 * then use it to set the chipset to rights. Don't
2429 * touch the DMA setup as that will be dealt with when
2430 * configuring devices.
2432 if (ap
->ops
->set_piomode
)
2433 ap
->ops
->set_piomode(ap
, dev
);
2436 /* reset and determine device classes */
2437 ap
->ops
->phy_reset(ap
);
2439 ata_link_for_each_dev(dev
, &ap
->link
) {
2440 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2441 dev
->class != ATA_DEV_UNKNOWN
)
2442 classes
[dev
->devno
] = dev
->class;
2444 classes
[dev
->devno
] = ATA_DEV_NONE
;
2446 dev
->class = ATA_DEV_UNKNOWN
;
2451 /* read IDENTIFY page and configure devices. We have to do the identify
2452 specific sequence bass-ackwards so that PDIAG- is released by
2455 ata_link_for_each_dev(dev
, &ap
->link
) {
2456 if (tries
[dev
->devno
])
2457 dev
->class = classes
[dev
->devno
];
2459 if (!ata_dev_enabled(dev
))
2462 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2468 /* Now ask for the cable type as PDIAG- should have been released */
2469 if (ap
->ops
->cable_detect
)
2470 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2472 /* We may have SATA bridge glue hiding here irrespective of the
2473 reported cable types and sensed types */
2474 ata_link_for_each_dev(dev
, &ap
->link
) {
2475 if (!ata_dev_enabled(dev
))
2477 /* SATA drives indicate we have a bridge. We don't know which
2478 end of the link the bridge is which is a problem */
2479 if (ata_id_is_sata(dev
->id
))
2480 ap
->cbl
= ATA_CBL_SATA
;
2483 /* After the identify sequence we can now set up the devices. We do
2484 this in the normal order so that the user doesn't get confused */
2486 ata_link_for_each_dev(dev
, &ap
->link
) {
2487 if (!ata_dev_enabled(dev
))
2490 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2491 rc
= ata_dev_configure(dev
);
2492 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2497 /* configure transfer mode */
2498 rc
= ata_set_mode(&ap
->link
, &dev
);
2502 ata_link_for_each_dev(dev
, &ap
->link
)
2503 if (ata_dev_enabled(dev
))
2506 /* no device present, disable port */
2507 ata_port_disable(ap
);
2511 tries
[dev
->devno
]--;
2515 /* eeek, something went very wrong, give up */
2516 tries
[dev
->devno
] = 0;
2520 /* give it just one more chance */
2521 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2523 if (tries
[dev
->devno
] == 1) {
2524 /* This is the last chance, better to slow
2525 * down than lose it.
2527 sata_down_spd_limit(&ap
->link
);
2528 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2532 if (!tries
[dev
->devno
])
2533 ata_dev_disable(dev
);
2539 * ata_port_probe - Mark port as enabled
2540 * @ap: Port for which we indicate enablement
2542 * Modify @ap data structure such that the system
2543 * thinks that the entire port is enabled.
2545 * LOCKING: host lock, or some other form of
2549 void ata_port_probe(struct ata_port
*ap
)
2551 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2555 * sata_print_link_status - Print SATA link status
2556 * @link: SATA link to printk link status about
2558 * This function prints link speed and status of a SATA link.
2563 void sata_print_link_status(struct ata_link
*link
)
2565 u32 sstatus
, scontrol
, tmp
;
2567 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2569 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2571 if (ata_link_online(link
)) {
2572 tmp
= (sstatus
>> 4) & 0xf;
2573 ata_link_printk(link
, KERN_INFO
,
2574 "SATA link up %s (SStatus %X SControl %X)\n",
2575 sata_spd_string(tmp
), sstatus
, scontrol
);
2577 ata_link_printk(link
, KERN_INFO
,
2578 "SATA link down (SStatus %X SControl %X)\n",
2584 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2585 * @ap: SATA port associated with target SATA PHY.
2587 * This function issues commands to standard SATA Sxxx
2588 * PHY registers, to wake up the phy (and device), and
2589 * clear any reset condition.
2592 * PCI/etc. bus probe sem.
2595 void __sata_phy_reset(struct ata_port
*ap
)
2597 struct ata_link
*link
= &ap
->link
;
2598 unsigned long timeout
= jiffies
+ (HZ
* 5);
2601 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
2602 /* issue phy wake/reset */
2603 sata_scr_write_flush(link
, SCR_CONTROL
, 0x301);
2604 /* Couldn't find anything in SATA I/II specs, but
2605 * AHCI-1.1 10.4.2 says at least 1 ms. */
2608 /* phy wake/clear reset */
2609 sata_scr_write_flush(link
, SCR_CONTROL
, 0x300);
2611 /* wait for phy to become ready, if necessary */
2614 sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2615 if ((sstatus
& 0xf) != 1)
2617 } while (time_before(jiffies
, timeout
));
2619 /* print link status */
2620 sata_print_link_status(link
);
2622 /* TODO: phy layer with polling, timeouts, etc. */
2623 if (!ata_link_offline(link
))
2626 ata_port_disable(ap
);
2628 if (ap
->flags
& ATA_FLAG_DISABLED
)
2631 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2632 ata_port_disable(ap
);
2636 ap
->cbl
= ATA_CBL_SATA
;
2640 * sata_phy_reset - Reset SATA bus.
2641 * @ap: SATA port associated with target SATA PHY.
2643 * This function resets the SATA bus, and then probes
2644 * the bus for devices.
2647 * PCI/etc. bus probe sem.
2650 void sata_phy_reset(struct ata_port
*ap
)
2652 __sata_phy_reset(ap
);
2653 if (ap
->flags
& ATA_FLAG_DISABLED
)
2659 * ata_dev_pair - return other device on cable
2662 * Obtain the other device on the same cable, or if none is
2663 * present NULL is returned
2666 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2668 struct ata_link
*link
= adev
->link
;
2669 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2670 if (!ata_dev_enabled(pair
))
2676 * ata_port_disable - Disable port.
2677 * @ap: Port to be disabled.
2679 * Modify @ap data structure such that the system
2680 * thinks that the entire port is disabled, and should
2681 * never attempt to probe or communicate with devices
2684 * LOCKING: host lock, or some other form of
2688 void ata_port_disable(struct ata_port
*ap
)
2690 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2691 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2692 ap
->flags
|= ATA_FLAG_DISABLED
;
2696 * sata_down_spd_limit - adjust SATA spd limit downward
2697 * @link: Link to adjust SATA spd limit for
2699 * Adjust SATA spd limit of @link downward. Note that this
2700 * function only adjusts the limit. The change must be applied
2701 * using sata_set_spd().
2704 * Inherited from caller.
2707 * 0 on success, negative errno on failure
2709 int sata_down_spd_limit(struct ata_link
*link
)
2711 u32 sstatus
, spd
, mask
;
2714 if (!sata_scr_valid(link
))
2717 /* If SCR can be read, use it to determine the current SPD.
2718 * If not, use cached value in link->sata_spd.
2720 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2722 spd
= (sstatus
>> 4) & 0xf;
2724 spd
= link
->sata_spd
;
2726 mask
= link
->sata_spd_limit
;
2730 /* unconditionally mask off the highest bit */
2731 highbit
= fls(mask
) - 1;
2732 mask
&= ~(1 << highbit
);
2734 /* Mask off all speeds higher than or equal to the current
2735 * one. Force 1.5Gbps if current SPD is not available.
2738 mask
&= (1 << (spd
- 1)) - 1;
2742 /* were we already at the bottom? */
2746 link
->sata_spd_limit
= mask
;
2748 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2749 sata_spd_string(fls(mask
)));
2754 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2756 struct ata_link
*host_link
= &link
->ap
->link
;
2757 u32 limit
, target
, spd
;
2759 limit
= link
->sata_spd_limit
;
2761 /* Don't configure downstream link faster than upstream link.
2762 * It doesn't speed up anything and some PMPs choke on such
2765 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2766 limit
&= (1 << host_link
->sata_spd
) - 1;
2768 if (limit
== UINT_MAX
)
2771 target
= fls(limit
);
2773 spd
= (*scontrol
>> 4) & 0xf;
2774 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2776 return spd
!= target
;
2780 * sata_set_spd_needed - is SATA spd configuration needed
2781 * @link: Link in question
2783 * Test whether the spd limit in SControl matches
2784 * @link->sata_spd_limit. This function is used to determine
2785 * whether hardreset is necessary to apply SATA spd
2789 * Inherited from caller.
2792 * 1 if SATA spd configuration is needed, 0 otherwise.
2794 int sata_set_spd_needed(struct ata_link
*link
)
2798 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2801 return __sata_set_spd_needed(link
, &scontrol
);
2805 * sata_set_spd - set SATA spd according to spd limit
2806 * @link: Link to set SATA spd for
2808 * Set SATA spd of @link according to sata_spd_limit.
2811 * Inherited from caller.
2814 * 0 if spd doesn't need to be changed, 1 if spd has been
2815 * changed. Negative errno if SCR registers are inaccessible.
2817 int sata_set_spd(struct ata_link
*link
)
2822 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2825 if (!__sata_set_spd_needed(link
, &scontrol
))
2828 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2835 * This mode timing computation functionality is ported over from
2836 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2839 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2840 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2841 * for UDMA6, which is currently supported only by Maxtor drives.
2843 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2846 static const struct ata_timing ata_timing
[] = {
2848 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2849 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2850 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2851 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2853 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2854 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2855 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2856 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2857 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2859 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2861 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2862 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2863 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2865 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2866 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2867 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2869 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2870 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2871 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2872 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2874 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2875 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2876 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2878 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2883 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2884 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2886 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2888 q
->setup
= EZ(t
->setup
* 1000, T
);
2889 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2890 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2891 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2892 q
->active
= EZ(t
->active
* 1000, T
);
2893 q
->recover
= EZ(t
->recover
* 1000, T
);
2894 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2895 q
->udma
= EZ(t
->udma
* 1000, UT
);
2898 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2899 struct ata_timing
*m
, unsigned int what
)
2901 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2902 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2903 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2904 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2905 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2906 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2907 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2908 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2911 static const struct ata_timing
*ata_timing_find_mode(unsigned short speed
)
2913 const struct ata_timing
*t
;
2915 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
2916 if (t
->mode
== 0xFF)
2921 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2922 struct ata_timing
*t
, int T
, int UT
)
2924 const struct ata_timing
*s
;
2925 struct ata_timing p
;
2931 if (!(s
= ata_timing_find_mode(speed
)))
2934 memcpy(t
, s
, sizeof(*s
));
2937 * If the drive is an EIDE drive, it can tell us it needs extended
2938 * PIO/MW_DMA cycle timing.
2941 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2942 memset(&p
, 0, sizeof(p
));
2943 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2944 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2945 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2946 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2947 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2949 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2953 * Convert the timing to bus clock counts.
2956 ata_timing_quantize(t
, t
, T
, UT
);
2959 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2960 * S.M.A.R.T * and some other commands. We have to ensure that the
2961 * DMA cycle timing is slower/equal than the fastest PIO timing.
2964 if (speed
> XFER_PIO_6
) {
2965 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2966 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2970 * Lengthen active & recovery time so that cycle time is correct.
2973 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2974 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2975 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2978 if (t
->active
+ t
->recover
< t
->cycle
) {
2979 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2980 t
->recover
= t
->cycle
- t
->active
;
2983 /* In a few cases quantisation may produce enough errors to
2984 leave t->cycle too low for the sum of active and recovery
2985 if so we must correct this */
2986 if (t
->active
+ t
->recover
> t
->cycle
)
2987 t
->cycle
= t
->active
+ t
->recover
;
2993 * ata_down_xfermask_limit - adjust dev xfer masks downward
2994 * @dev: Device to adjust xfer masks
2995 * @sel: ATA_DNXFER_* selector
2997 * Adjust xfer masks of @dev downward. Note that this function
2998 * does not apply the change. Invoking ata_set_mode() afterwards
2999 * will apply the limit.
3002 * Inherited from caller.
3005 * 0 on success, negative errno on failure
3007 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3010 unsigned int orig_mask
, xfer_mask
;
3011 unsigned int pio_mask
, mwdma_mask
, udma_mask
;
3014 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3015 sel
&= ~ATA_DNXFER_QUIET
;
3017 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3020 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3023 case ATA_DNXFER_PIO
:
3024 highbit
= fls(pio_mask
) - 1;
3025 pio_mask
&= ~(1 << highbit
);
3028 case ATA_DNXFER_DMA
:
3030 highbit
= fls(udma_mask
) - 1;
3031 udma_mask
&= ~(1 << highbit
);
3034 } else if (mwdma_mask
) {
3035 highbit
= fls(mwdma_mask
) - 1;
3036 mwdma_mask
&= ~(1 << highbit
);
3042 case ATA_DNXFER_40C
:
3043 udma_mask
&= ATA_UDMA_MASK_40C
;
3046 case ATA_DNXFER_FORCE_PIO0
:
3048 case ATA_DNXFER_FORCE_PIO
:
3057 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3059 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3063 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3064 snprintf(buf
, sizeof(buf
), "%s:%s",
3065 ata_mode_string(xfer_mask
),
3066 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3068 snprintf(buf
, sizeof(buf
), "%s",
3069 ata_mode_string(xfer_mask
));
3071 ata_dev_printk(dev
, KERN_WARNING
,
3072 "limiting speed to %s\n", buf
);
3075 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3081 static int ata_dev_set_mode(struct ata_device
*dev
)
3083 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3084 unsigned int err_mask
;
3087 dev
->flags
&= ~ATA_DFLAG_PIO
;
3088 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3089 dev
->flags
|= ATA_DFLAG_PIO
;
3091 err_mask
= ata_dev_set_xfermode(dev
);
3093 /* Old CFA may refuse this command, which is just fine */
3094 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3095 err_mask
&= ~AC_ERR_DEV
;
3097 /* Some very old devices and some bad newer ones fail any kind of
3098 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3099 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3100 dev
->pio_mode
<= XFER_PIO_2
)
3101 err_mask
&= ~AC_ERR_DEV
;
3103 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3104 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3105 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3106 dev
->dma_mode
== XFER_MW_DMA_0
&&
3107 (dev
->id
[63] >> 8) & 1)
3108 err_mask
&= ~AC_ERR_DEV
;
3111 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3112 "(err_mask=0x%x)\n", err_mask
);
3116 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3117 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3118 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3122 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3123 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3125 ata_dev_printk(dev
, KERN_INFO
, "configured for %s\n",
3126 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)));
3131 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3132 * @link: link on which timings will be programmed
3133 * @r_failed_dev: out paramter for failed device
3135 * Standard implementation of the function used to tune and set
3136 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3137 * ata_dev_set_mode() fails, pointer to the failing device is
3138 * returned in @r_failed_dev.
3141 * PCI/etc. bus probe sem.
3144 * 0 on success, negative errno otherwise
3147 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3149 struct ata_port
*ap
= link
->ap
;
3150 struct ata_device
*dev
;
3151 int rc
= 0, used_dma
= 0, found
= 0;
3153 /* step 1: calculate xfer_mask */
3154 ata_link_for_each_dev(dev
, link
) {
3155 unsigned int pio_mask
, dma_mask
;
3156 unsigned int mode_mask
;
3158 if (!ata_dev_enabled(dev
))
3161 mode_mask
= ATA_DMA_MASK_ATA
;
3162 if (dev
->class == ATA_DEV_ATAPI
)
3163 mode_mask
= ATA_DMA_MASK_ATAPI
;
3164 else if (ata_id_is_cfa(dev
->id
))
3165 mode_mask
= ATA_DMA_MASK_CFA
;
3167 ata_dev_xfermask(dev
);
3169 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3170 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3172 if (libata_dma_mask
& mode_mask
)
3173 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3177 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3178 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3187 /* step 2: always set host PIO timings */
3188 ata_link_for_each_dev(dev
, link
) {
3189 if (!ata_dev_enabled(dev
))
3192 if (!dev
->pio_mode
) {
3193 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3198 dev
->xfer_mode
= dev
->pio_mode
;
3199 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3200 if (ap
->ops
->set_piomode
)
3201 ap
->ops
->set_piomode(ap
, dev
);
3204 /* step 3: set host DMA timings */
3205 ata_link_for_each_dev(dev
, link
) {
3206 if (!ata_dev_enabled(dev
) || !dev
->dma_mode
)
3209 dev
->xfer_mode
= dev
->dma_mode
;
3210 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3211 if (ap
->ops
->set_dmamode
)
3212 ap
->ops
->set_dmamode(ap
, dev
);
3215 /* step 4: update devices' xfer mode */
3216 ata_link_for_each_dev(dev
, link
) {
3217 /* don't update suspended devices' xfer mode */
3218 if (!ata_dev_enabled(dev
))
3221 rc
= ata_dev_set_mode(dev
);
3226 /* Record simplex status. If we selected DMA then the other
3227 * host channels are not permitted to do so.
3229 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3230 ap
->host
->simplex_claimed
= ap
;
3234 *r_failed_dev
= dev
;
3239 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3240 * @link: link on which timings will be programmed
3241 * @r_failed_dev: out paramter for failed device
3243 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3244 * ata_set_mode() fails, pointer to the failing device is
3245 * returned in @r_failed_dev.
3248 * PCI/etc. bus probe sem.
3251 * 0 on success, negative errno otherwise
3253 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3255 struct ata_port
*ap
= link
->ap
;
3257 /* has private set_mode? */
3258 if (ap
->ops
->set_mode
)
3259 return ap
->ops
->set_mode(link
, r_failed_dev
);
3260 return ata_do_set_mode(link
, r_failed_dev
);
3264 * ata_tf_to_host - issue ATA taskfile to host controller
3265 * @ap: port to which command is being issued
3266 * @tf: ATA taskfile register set
3268 * Issues ATA taskfile register set to ATA host controller,
3269 * with proper synchronization with interrupt handler and
3273 * spin_lock_irqsave(host lock)
3276 static inline void ata_tf_to_host(struct ata_port
*ap
,
3277 const struct ata_taskfile
*tf
)
3279 ap
->ops
->tf_load(ap
, tf
);
3280 ap
->ops
->exec_command(ap
, tf
);
3284 * ata_busy_sleep - sleep until BSY clears, or timeout
3285 * @ap: port containing status register to be polled
3286 * @tmout_pat: impatience timeout
3287 * @tmout: overall timeout
3289 * Sleep until ATA Status register bit BSY clears,
3290 * or a timeout occurs.
3293 * Kernel thread context (may sleep).
3296 * 0 on success, -errno otherwise.
3298 int ata_busy_sleep(struct ata_port
*ap
,
3299 unsigned long tmout_pat
, unsigned long tmout
)
3301 unsigned long timer_start
, timeout
;
3304 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3305 timer_start
= jiffies
;
3306 timeout
= timer_start
+ tmout_pat
;
3307 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3308 time_before(jiffies
, timeout
)) {
3310 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3313 if (status
!= 0xff && (status
& ATA_BUSY
))
3314 ata_port_printk(ap
, KERN_WARNING
,
3315 "port is slow to respond, please be patient "
3316 "(Status 0x%x)\n", status
);
3318 timeout
= timer_start
+ tmout
;
3319 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3320 time_before(jiffies
, timeout
)) {
3322 status
= ata_chk_status(ap
);
3328 if (status
& ATA_BUSY
) {
3329 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3330 "(%lu secs, Status 0x%x)\n",
3331 tmout
/ HZ
, status
);
3339 * ata_wait_after_reset - wait before checking status after reset
3340 * @ap: port containing status register to be polled
3341 * @deadline: deadline jiffies for the operation
3343 * After reset, we need to pause a while before reading status.
3344 * Also, certain combination of controller and device report 0xff
3345 * for some duration (e.g. until SATA PHY is up and running)
3346 * which is interpreted as empty port in ATA world. This
3347 * function also waits for such devices to get out of 0xff
3351 * Kernel thread context (may sleep).
3353 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3355 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3357 if (time_before(until
, deadline
))
3360 /* Spec mandates ">= 2ms" before checking status. We wait
3361 * 150ms, because that was the magic delay used for ATAPI
3362 * devices in Hale Landis's ATADRVR, for the period of time
3363 * between when the ATA command register is written, and then
3364 * status is checked. Because waiting for "a while" before
3365 * checking status is fine, post SRST, we perform this magic
3366 * delay here as well.
3368 * Old drivers/ide uses the 2mS rule and then waits for ready.
3372 /* Wait for 0xff to clear. Some SATA devices take a long time
3373 * to clear 0xff after reset. For example, HHD424020F7SV00
3374 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3377 * Note that some PATA controllers (pata_ali) explode if
3378 * status register is read more than once when there's no
3381 if (ap
->flags
& ATA_FLAG_SATA
) {
3383 u8 status
= ata_chk_status(ap
);
3385 if (status
!= 0xff || time_after(jiffies
, deadline
))
3394 * ata_wait_ready - sleep until BSY clears, or timeout
3395 * @ap: port containing status register to be polled
3396 * @deadline: deadline jiffies for the operation
3398 * Sleep until ATA Status register bit BSY clears, or timeout
3402 * Kernel thread context (may sleep).
3405 * 0 on success, -errno otherwise.
3407 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3409 unsigned long start
= jiffies
;
3413 u8 status
= ata_chk_status(ap
);
3414 unsigned long now
= jiffies
;
3416 if (!(status
& ATA_BUSY
))
3418 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3420 if (time_after(now
, deadline
))
3423 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3424 (deadline
- now
> 3 * HZ
)) {
3425 ata_port_printk(ap
, KERN_WARNING
,
3426 "port is slow to respond, please be patient "
3427 "(Status 0x%x)\n", status
);
3435 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3436 unsigned long deadline
)
3438 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3439 unsigned int dev0
= devmask
& (1 << 0);
3440 unsigned int dev1
= devmask
& (1 << 1);
3443 /* if device 0 was found in ata_devchk, wait for its
3447 rc
= ata_wait_ready(ap
, deadline
);
3455 /* if device 1 was found in ata_devchk, wait for register
3456 * access briefly, then wait for BSY to clear.
3461 ap
->ops
->dev_select(ap
, 1);
3463 /* Wait for register access. Some ATAPI devices fail
3464 * to set nsect/lbal after reset, so don't waste too
3465 * much time on it. We're gonna wait for !BSY anyway.
3467 for (i
= 0; i
< 2; i
++) {
3470 nsect
= ioread8(ioaddr
->nsect_addr
);
3471 lbal
= ioread8(ioaddr
->lbal_addr
);
3472 if ((nsect
== 1) && (lbal
== 1))
3474 msleep(50); /* give drive a breather */
3477 rc
= ata_wait_ready(ap
, deadline
);
3485 /* is all this really necessary? */
3486 ap
->ops
->dev_select(ap
, 0);
3488 ap
->ops
->dev_select(ap
, 1);
3490 ap
->ops
->dev_select(ap
, 0);
3495 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3496 unsigned long deadline
)
3498 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3500 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3502 /* software reset. causes dev0 to be selected */
3503 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3504 udelay(20); /* FIXME: flush */
3505 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3506 udelay(20); /* FIXME: flush */
3507 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3509 /* wait a while before checking status */
3510 ata_wait_after_reset(ap
, deadline
);
3512 /* Before we perform post reset processing we want to see if
3513 * the bus shows 0xFF because the odd clown forgets the D7
3514 * pulldown resistor.
3516 if (ata_chk_status(ap
) == 0xFF)
3519 return ata_bus_post_reset(ap
, devmask
, deadline
);
3523 * ata_bus_reset - reset host port and associated ATA channel
3524 * @ap: port to reset
3526 * This is typically the first time we actually start issuing
3527 * commands to the ATA channel. We wait for BSY to clear, then
3528 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3529 * result. Determine what devices, if any, are on the channel
3530 * by looking at the device 0/1 error register. Look at the signature
3531 * stored in each device's taskfile registers, to determine if
3532 * the device is ATA or ATAPI.
3535 * PCI/etc. bus probe sem.
3536 * Obtains host lock.
3539 * Sets ATA_FLAG_DISABLED if bus reset fails.
3542 void ata_bus_reset(struct ata_port
*ap
)
3544 struct ata_device
*device
= ap
->link
.device
;
3545 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3546 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3548 unsigned int dev0
, dev1
= 0, devmask
= 0;
3551 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3553 /* determine if device 0/1 are present */
3554 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3557 dev0
= ata_devchk(ap
, 0);
3559 dev1
= ata_devchk(ap
, 1);
3563 devmask
|= (1 << 0);
3565 devmask
|= (1 << 1);
3567 /* select device 0 again */
3568 ap
->ops
->dev_select(ap
, 0);
3570 /* issue bus reset */
3571 if (ap
->flags
& ATA_FLAG_SRST
) {
3572 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3573 if (rc
&& rc
!= -ENODEV
)
3578 * determine by signature whether we have ATA or ATAPI devices
3580 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3581 if ((slave_possible
) && (err
!= 0x81))
3582 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3584 /* is double-select really necessary? */
3585 if (device
[1].class != ATA_DEV_NONE
)
3586 ap
->ops
->dev_select(ap
, 1);
3587 if (device
[0].class != ATA_DEV_NONE
)
3588 ap
->ops
->dev_select(ap
, 0);
3590 /* if no devices were detected, disable this port */
3591 if ((device
[0].class == ATA_DEV_NONE
) &&
3592 (device
[1].class == ATA_DEV_NONE
))
3595 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3596 /* set up device control for ATA_FLAG_SATA_RESET */
3597 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3604 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3605 ata_port_disable(ap
);
3611 * sata_link_debounce - debounce SATA phy status
3612 * @link: ATA link to debounce SATA phy status for
3613 * @params: timing parameters { interval, duratinon, timeout } in msec
3614 * @deadline: deadline jiffies for the operation
3616 * Make sure SStatus of @link reaches stable state, determined by
3617 * holding the same value where DET is not 1 for @duration polled
3618 * every @interval, before @timeout. Timeout constraints the
3619 * beginning of the stable state. Because DET gets stuck at 1 on
3620 * some controllers after hot unplugging, this functions waits
3621 * until timeout then returns 0 if DET is stable at 1.
3623 * @timeout is further limited by @deadline. The sooner of the
3627 * Kernel thread context (may sleep)
3630 * 0 on success, -errno on failure.
3632 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3633 unsigned long deadline
)
3635 unsigned long interval_msec
= params
[0];
3636 unsigned long duration
= msecs_to_jiffies(params
[1]);
3637 unsigned long last_jiffies
, t
;
3641 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3642 if (time_before(t
, deadline
))
3645 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3650 last_jiffies
= jiffies
;
3653 msleep(interval_msec
);
3654 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3660 if (cur
== 1 && time_before(jiffies
, deadline
))
3662 if (time_after(jiffies
, last_jiffies
+ duration
))
3667 /* unstable, start over */
3669 last_jiffies
= jiffies
;
3671 /* Check deadline. If debouncing failed, return
3672 * -EPIPE to tell upper layer to lower link speed.
3674 if (time_after(jiffies
, deadline
))
3680 * sata_link_resume - resume SATA link
3681 * @link: ATA link to resume SATA
3682 * @params: timing parameters { interval, duratinon, timeout } in msec
3683 * @deadline: deadline jiffies for the operation
3685 * Resume SATA phy @link and debounce it.
3688 * Kernel thread context (may sleep)
3691 * 0 on success, -errno on failure.
3693 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3694 unsigned long deadline
)
3699 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3702 scontrol
= (scontrol
& 0x0f0) | 0x300;
3704 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3707 /* Some PHYs react badly if SStatus is pounded immediately
3708 * after resuming. Delay 200ms before debouncing.
3712 return sata_link_debounce(link
, params
, deadline
);
3716 * ata_std_prereset - prepare for reset
3717 * @link: ATA link to be reset
3718 * @deadline: deadline jiffies for the operation
3720 * @link is about to be reset. Initialize it. Failure from
3721 * prereset makes libata abort whole reset sequence and give up
3722 * that port, so prereset should be best-effort. It does its
3723 * best to prepare for reset sequence but if things go wrong, it
3724 * should just whine, not fail.
3727 * Kernel thread context (may sleep)
3730 * 0 on success, -errno otherwise.
3732 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3734 struct ata_port
*ap
= link
->ap
;
3735 struct ata_eh_context
*ehc
= &link
->eh_context
;
3736 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3739 /* handle link resume */
3740 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3741 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3742 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3744 /* Some PMPs don't work with only SRST, force hardreset if PMP
3747 if (ap
->flags
& ATA_FLAG_PMP
)
3748 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3750 /* if we're about to do hardreset, nothing more to do */
3751 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3754 /* if SATA, resume link */
3755 if (ap
->flags
& ATA_FLAG_SATA
) {
3756 rc
= sata_link_resume(link
, timing
, deadline
);
3757 /* whine about phy resume failure but proceed */
3758 if (rc
&& rc
!= -EOPNOTSUPP
)
3759 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3760 "link for reset (errno=%d)\n", rc
);
3763 /* Wait for !BSY if the controller can wait for the first D2H
3764 * Reg FIS and we don't know that no device is attached.
3766 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3767 rc
= ata_wait_ready(ap
, deadline
);
3768 if (rc
&& rc
!= -ENODEV
) {
3769 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3770 "(errno=%d), forcing hardreset\n", rc
);
3771 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3779 * ata_std_softreset - reset host port via ATA SRST
3780 * @link: ATA link to reset
3781 * @classes: resulting classes of attached devices
3782 * @deadline: deadline jiffies for the operation
3784 * Reset host port using ATA SRST.
3787 * Kernel thread context (may sleep)
3790 * 0 on success, -errno otherwise.
3792 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3793 unsigned long deadline
)
3795 struct ata_port
*ap
= link
->ap
;
3796 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3797 unsigned int devmask
= 0;
3803 if (ata_link_offline(link
)) {
3804 classes
[0] = ATA_DEV_NONE
;
3808 /* determine if device 0/1 are present */
3809 if (ata_devchk(ap
, 0))
3810 devmask
|= (1 << 0);
3811 if (slave_possible
&& ata_devchk(ap
, 1))
3812 devmask
|= (1 << 1);
3814 /* select device 0 again */
3815 ap
->ops
->dev_select(ap
, 0);
3817 /* issue bus reset */
3818 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3819 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3820 /* if link is occupied, -ENODEV too is an error */
3821 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3822 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3826 /* determine by signature whether we have ATA or ATAPI devices */
3827 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3828 devmask
& (1 << 0), &err
);
3829 if (slave_possible
&& err
!= 0x81)
3830 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3831 devmask
& (1 << 1), &err
);
3834 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3839 * sata_link_hardreset - reset link via SATA phy reset
3840 * @link: link to reset
3841 * @timing: timing parameters { interval, duratinon, timeout } in msec
3842 * @deadline: deadline jiffies for the operation
3844 * SATA phy-reset @link using DET bits of SControl register.
3847 * Kernel thread context (may sleep)
3850 * 0 on success, -errno otherwise.
3852 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3853 unsigned long deadline
)
3860 if (sata_set_spd_needed(link
)) {
3861 /* SATA spec says nothing about how to reconfigure
3862 * spd. To be on the safe side, turn off phy during
3863 * reconfiguration. This works for at least ICH7 AHCI
3866 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3869 scontrol
= (scontrol
& 0x0f0) | 0x304;
3871 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3877 /* issue phy wake/reset */
3878 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3881 scontrol
= (scontrol
& 0x0f0) | 0x301;
3883 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3886 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3887 * 10.4.2 says at least 1 ms.
3891 /* bring link back */
3892 rc
= sata_link_resume(link
, timing
, deadline
);
3894 DPRINTK("EXIT, rc=%d\n", rc
);
3899 * sata_std_hardreset - reset host port via SATA phy reset
3900 * @link: link to reset
3901 * @class: resulting class of attached device
3902 * @deadline: deadline jiffies for the operation
3904 * SATA phy-reset host port using DET bits of SControl register,
3905 * wait for !BSY and classify the attached device.
3908 * Kernel thread context (may sleep)
3911 * 0 on success, -errno otherwise.
3913 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3914 unsigned long deadline
)
3916 struct ata_port
*ap
= link
->ap
;
3917 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3923 rc
= sata_link_hardreset(link
, timing
, deadline
);
3925 ata_link_printk(link
, KERN_ERR
,
3926 "COMRESET failed (errno=%d)\n", rc
);
3930 /* TODO: phy layer with polling, timeouts, etc. */
3931 if (ata_link_offline(link
)) {
3932 *class = ATA_DEV_NONE
;
3933 DPRINTK("EXIT, link offline\n");
3937 /* wait a while before checking status */
3938 ata_wait_after_reset(ap
, deadline
);
3940 /* If PMP is supported, we have to do follow-up SRST. Note
3941 * that some PMPs don't send D2H Reg FIS after hardreset at
3942 * all if the first port is empty. Wait for it just for a
3943 * second and request follow-up SRST.
3945 if (ap
->flags
& ATA_FLAG_PMP
) {
3946 ata_wait_ready(ap
, jiffies
+ HZ
);
3950 rc
= ata_wait_ready(ap
, deadline
);
3951 /* link occupied, -ENODEV too is an error */
3953 ata_link_printk(link
, KERN_ERR
,
3954 "COMRESET failed (errno=%d)\n", rc
);
3958 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
3960 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
3962 DPRINTK("EXIT, class=%u\n", *class);
3967 * ata_std_postreset - standard postreset callback
3968 * @link: the target ata_link
3969 * @classes: classes of attached devices
3971 * This function is invoked after a successful reset. Note that
3972 * the device might have been reset more than once using
3973 * different reset methods before postreset is invoked.
3976 * Kernel thread context (may sleep)
3978 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3980 struct ata_port
*ap
= link
->ap
;
3985 /* print link status */
3986 sata_print_link_status(link
);
3989 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
3990 sata_scr_write(link
, SCR_ERROR
, serror
);
3992 /* is double-select really necessary? */
3993 if (classes
[0] != ATA_DEV_NONE
)
3994 ap
->ops
->dev_select(ap
, 1);
3995 if (classes
[1] != ATA_DEV_NONE
)
3996 ap
->ops
->dev_select(ap
, 0);
3998 /* bail out if no device is present */
3999 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
4000 DPRINTK("EXIT, no device\n");
4004 /* set up device control */
4005 if (ap
->ioaddr
.ctl_addr
)
4006 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
4012 * ata_dev_same_device - Determine whether new ID matches configured device
4013 * @dev: device to compare against
4014 * @new_class: class of the new device
4015 * @new_id: IDENTIFY page of the new device
4017 * Compare @new_class and @new_id against @dev and determine
4018 * whether @dev is the device indicated by @new_class and
4025 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4027 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
4030 const u16
*old_id
= dev
->id
;
4031 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
4032 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
4034 if (dev
->class != new_class
) {
4035 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
4036 dev
->class, new_class
);
4040 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
4041 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
4042 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
4043 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
4045 if (strcmp(model
[0], model
[1])) {
4046 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
4047 "'%s' != '%s'\n", model
[0], model
[1]);
4051 if (strcmp(serial
[0], serial
[1])) {
4052 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
4053 "'%s' != '%s'\n", serial
[0], serial
[1]);
4061 * ata_dev_reread_id - Re-read IDENTIFY data
4062 * @dev: target ATA device
4063 * @readid_flags: read ID flags
4065 * Re-read IDENTIFY page and make sure @dev is still attached to
4069 * Kernel thread context (may sleep)
4072 * 0 on success, negative errno otherwise
4074 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4076 unsigned int class = dev
->class;
4077 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4081 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4085 /* is the device still there? */
4086 if (!ata_dev_same_device(dev
, class, id
))
4089 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4094 * ata_dev_revalidate - Revalidate ATA device
4095 * @dev: device to revalidate
4096 * @new_class: new class code
4097 * @readid_flags: read ID flags
4099 * Re-read IDENTIFY page, make sure @dev is still attached to the
4100 * port and reconfigure it according to the new IDENTIFY page.
4103 * Kernel thread context (may sleep)
4106 * 0 on success, negative errno otherwise
4108 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4109 unsigned int readid_flags
)
4111 u64 n_sectors
= dev
->n_sectors
;
4114 if (!ata_dev_enabled(dev
))
4117 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4118 if (ata_class_enabled(new_class
) &&
4119 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4120 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4121 dev
->class, new_class
);
4127 rc
= ata_dev_reread_id(dev
, readid_flags
);
4131 /* configure device according to the new ID */
4132 rc
= ata_dev_configure(dev
);
4136 /* verify n_sectors hasn't changed */
4137 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4138 dev
->n_sectors
!= n_sectors
) {
4139 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4141 (unsigned long long)n_sectors
,
4142 (unsigned long long)dev
->n_sectors
);
4144 /* restore original n_sectors */
4145 dev
->n_sectors
= n_sectors
;
4154 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4158 struct ata_blacklist_entry
{
4159 const char *model_num
;
4160 const char *model_rev
;
4161 unsigned long horkage
;
4164 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4165 /* Devices with DMA related problems under Linux */
4166 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4167 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4168 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4169 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4170 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4171 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4172 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4173 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4174 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4175 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4176 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4177 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4178 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4179 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4180 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4181 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4182 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4183 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4184 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4185 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4186 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4187 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4188 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4189 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4190 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4191 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4192 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4193 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4194 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4195 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4196 /* Odd clown on sil3726/4726 PMPs */
4197 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
4198 ATA_HORKAGE_SKIP_PM
},
4200 /* Weird ATAPI devices */
4201 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4203 /* Devices we expect to fail diagnostics */
4205 /* Devices where NCQ should be avoided */
4207 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4208 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4209 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4211 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4212 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4213 { "HITACHI HDS7250SASUN500G*", NULL
, ATA_HORKAGE_NONCQ
},
4214 { "HITACHI HDS7225SBSUN250G*", NULL
, ATA_HORKAGE_NONCQ
},
4215 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4217 /* Blacklist entries taken from Silicon Image 3124/3132
4218 Windows driver .inf file - also several Linux problem reports */
4219 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4220 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4221 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4222 /* Drives which do spurious command completion */
4223 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ
, },
4224 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ
, },
4225 { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ
, },
4226 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ
, },
4227 { "Hitachi HTS542525K9SA00", "BBFOC31P", ATA_HORKAGE_NONCQ
, },
4228 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4229 { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ
, },
4230 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ
, },
4231 { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
4232 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ
, },
4233 { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ
, },
4234 { "ST9160821AS", "3.CCD", ATA_HORKAGE_NONCQ
, },
4235 { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ
, },
4236 { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ
, },
4237 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ
, },
4238 { "Maxtor 7V300F0", "VA111900", ATA_HORKAGE_NONCQ
, },
4240 /* devices which puke on READ_NATIVE_MAX */
4241 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4242 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4243 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4244 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4246 /* Devices which report 1 sector over size HPA */
4247 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4248 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4250 /* Devices which get the IVB wrong */
4251 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4252 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4258 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4264 * check for trailing wildcard: *\0
4266 p
= strchr(patt
, wildchar
);
4267 if (p
&& ((*(p
+ 1)) == 0))
4278 return strncmp(patt
, name
, len
);
4281 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4283 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4284 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4285 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4287 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4288 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4290 while (ad
->model_num
) {
4291 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4292 if (ad
->model_rev
== NULL
)
4294 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4302 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4304 /* We don't support polling DMA.
4305 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4306 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4308 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4309 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4311 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4315 * ata_is_40wire - check drive side detection
4318 * Perform drive side detection decoding, allowing for device vendors
4319 * who can't follow the documentation.
4322 static int ata_is_40wire(struct ata_device
*dev
)
4324 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4325 return ata_drive_40wire_relaxed(dev
->id
);
4326 return ata_drive_40wire(dev
->id
);
4330 * ata_dev_xfermask - Compute supported xfermask of the given device
4331 * @dev: Device to compute xfermask for
4333 * Compute supported xfermask of @dev and store it in
4334 * dev->*_mask. This function is responsible for applying all
4335 * known limits including host controller limits, device
4341 static void ata_dev_xfermask(struct ata_device
*dev
)
4343 struct ata_link
*link
= dev
->link
;
4344 struct ata_port
*ap
= link
->ap
;
4345 struct ata_host
*host
= ap
->host
;
4346 unsigned long xfer_mask
;
4348 /* controller modes available */
4349 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4350 ap
->mwdma_mask
, ap
->udma_mask
);
4352 /* drive modes available */
4353 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4354 dev
->mwdma_mask
, dev
->udma_mask
);
4355 xfer_mask
&= ata_id_xfermask(dev
->id
);
4358 * CFA Advanced TrueIDE timings are not allowed on a shared
4361 if (ata_dev_pair(dev
)) {
4362 /* No PIO5 or PIO6 */
4363 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4364 /* No MWDMA3 or MWDMA 4 */
4365 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4368 if (ata_dma_blacklisted(dev
)) {
4369 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4370 ata_dev_printk(dev
, KERN_WARNING
,
4371 "device is on DMA blacklist, disabling DMA\n");
4374 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4375 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4376 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4377 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4378 "other device, disabling DMA\n");
4381 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4382 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4384 if (ap
->ops
->mode_filter
)
4385 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4387 /* Apply cable rule here. Don't apply it early because when
4388 * we handle hot plug the cable type can itself change.
4389 * Check this last so that we know if the transfer rate was
4390 * solely limited by the cable.
4391 * Unknown or 80 wire cables reported host side are checked
4392 * drive side as well. Cases where we know a 40wire cable
4393 * is used safely for 80 are not checked here.
4395 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4396 /* UDMA/44 or higher would be available */
4397 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4398 (ata_is_40wire(dev
) &&
4399 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4400 ap
->cbl
== ATA_CBL_PATA80
))) {
4401 ata_dev_printk(dev
, KERN_WARNING
,
4402 "limited to UDMA/33 due to 40-wire cable\n");
4403 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4406 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4407 &dev
->mwdma_mask
, &dev
->udma_mask
);
4411 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4412 * @dev: Device to which command will be sent
4414 * Issue SET FEATURES - XFER MODE command to device @dev
4418 * PCI/etc. bus probe sem.
4421 * 0 on success, AC_ERR_* mask otherwise.
4424 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4426 struct ata_taskfile tf
;
4427 unsigned int err_mask
;
4429 /* set up set-features taskfile */
4430 DPRINTK("set features - xfer mode\n");
4432 /* Some controllers and ATAPI devices show flaky interrupt
4433 * behavior after setting xfer mode. Use polling instead.
4435 ata_tf_init(dev
, &tf
);
4436 tf
.command
= ATA_CMD_SET_FEATURES
;
4437 tf
.feature
= SETFEATURES_XFER
;
4438 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4439 tf
.protocol
= ATA_PROT_NODATA
;
4440 tf
.nsect
= dev
->xfer_mode
;
4442 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4444 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4448 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4449 * @dev: Device to which command will be sent
4450 * @enable: Whether to enable or disable the feature
4451 * @feature: The sector count represents the feature to set
4453 * Issue SET FEATURES - SATA FEATURES command to device @dev
4454 * on port @ap with sector count
4457 * PCI/etc. bus probe sem.
4460 * 0 on success, AC_ERR_* mask otherwise.
4462 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4465 struct ata_taskfile tf
;
4466 unsigned int err_mask
;
4468 /* set up set-features taskfile */
4469 DPRINTK("set features - SATA features\n");
4471 ata_tf_init(dev
, &tf
);
4472 tf
.command
= ATA_CMD_SET_FEATURES
;
4473 tf
.feature
= enable
;
4474 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4475 tf
.protocol
= ATA_PROT_NODATA
;
4478 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4480 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4485 * ata_dev_init_params - Issue INIT DEV PARAMS command
4486 * @dev: Device to which command will be sent
4487 * @heads: Number of heads (taskfile parameter)
4488 * @sectors: Number of sectors (taskfile parameter)
4491 * Kernel thread context (may sleep)
4494 * 0 on success, AC_ERR_* mask otherwise.
4496 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4497 u16 heads
, u16 sectors
)
4499 struct ata_taskfile tf
;
4500 unsigned int err_mask
;
4502 /* Number of sectors per track 1-255. Number of heads 1-16 */
4503 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4504 return AC_ERR_INVALID
;
4506 /* set up init dev params taskfile */
4507 DPRINTK("init dev params \n");
4509 ata_tf_init(dev
, &tf
);
4510 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4511 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4512 tf
.protocol
= ATA_PROT_NODATA
;
4514 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4516 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4517 /* A clean abort indicates an original or just out of spec drive
4518 and we should continue as we issue the setup based on the
4519 drive reported working geometry */
4520 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4523 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4528 * ata_sg_clean - Unmap DMA memory associated with command
4529 * @qc: Command containing DMA memory to be released
4531 * Unmap all mapped DMA memory associated with this command.
4534 * spin_lock_irqsave(host lock)
4536 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4538 struct ata_port
*ap
= qc
->ap
;
4539 struct scatterlist
*sg
= qc
->__sg
;
4540 int dir
= qc
->dma_dir
;
4541 void *pad_buf
= NULL
;
4543 WARN_ON(!(qc
->flags
& ATA_QCFLAG_DMAMAP
));
4544 WARN_ON(sg
== NULL
);
4546 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
4547 WARN_ON(qc
->n_elem
> 1);
4549 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4551 /* if we padded the buffer out to 32-bit bound, and data
4552 * xfer direction is from-device, we must copy from the
4553 * pad buffer back into the supplied buffer
4555 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
4556 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4558 if (qc
->flags
& ATA_QCFLAG_SG
) {
4560 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4561 /* restore last sg */
4562 sg_last(sg
, qc
->orig_n_elem
)->length
+= qc
->pad_len
;
4564 struct scatterlist
*psg
= &qc
->pad_sgent
;
4565 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4566 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
4567 kunmap_atomic(addr
, KM_IRQ0
);
4571 dma_unmap_single(ap
->dev
,
4572 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
4575 sg
->length
+= qc
->pad_len
;
4577 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4578 pad_buf
, qc
->pad_len
);
4581 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4586 * ata_fill_sg - Fill PCI IDE PRD table
4587 * @qc: Metadata associated with taskfile to be transferred
4589 * Fill PCI IDE PRD (scatter-gather) table with segments
4590 * associated with the current disk command.
4593 * spin_lock_irqsave(host lock)
4596 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4598 struct ata_port
*ap
= qc
->ap
;
4599 struct scatterlist
*sg
;
4602 WARN_ON(qc
->__sg
== NULL
);
4603 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4606 ata_for_each_sg(sg
, qc
) {
4610 /* determine if physical DMA addr spans 64K boundary.
4611 * Note h/w doesn't support 64-bit, so we unconditionally
4612 * truncate dma_addr_t to u32.
4614 addr
= (u32
) sg_dma_address(sg
);
4615 sg_len
= sg_dma_len(sg
);
4618 offset
= addr
& 0xffff;
4620 if ((offset
+ sg_len
) > 0x10000)
4621 len
= 0x10000 - offset
;
4623 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4624 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
4625 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4634 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4638 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4639 * @qc: Metadata associated with taskfile to be transferred
4641 * Fill PCI IDE PRD (scatter-gather) table with segments
4642 * associated with the current disk command. Perform the fill
4643 * so that we avoid writing any length 64K records for
4644 * controllers that don't follow the spec.
4647 * spin_lock_irqsave(host lock)
4650 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4652 struct ata_port
*ap
= qc
->ap
;
4653 struct scatterlist
*sg
;
4656 WARN_ON(qc
->__sg
== NULL
);
4657 WARN_ON(qc
->n_elem
== 0 && qc
->pad_len
== 0);
4660 ata_for_each_sg(sg
, qc
) {
4662 u32 sg_len
, len
, blen
;
4664 /* determine if physical DMA addr spans 64K boundary.
4665 * Note h/w doesn't support 64-bit, so we unconditionally
4666 * truncate dma_addr_t to u32.
4668 addr
= (u32
) sg_dma_address(sg
);
4669 sg_len
= sg_dma_len(sg
);
4672 offset
= addr
& 0xffff;
4674 if ((offset
+ sg_len
) > 0x10000)
4675 len
= 0x10000 - offset
;
4677 blen
= len
& 0xffff;
4678 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
4680 /* Some PATA chipsets like the CS5530 can't
4681 cope with 0x0000 meaning 64K as the spec says */
4682 ap
->prd
[idx
].flags_len
= cpu_to_le32(0x8000);
4684 ap
->prd
[++idx
].addr
= cpu_to_le32(addr
+ 0x8000);
4686 ap
->prd
[idx
].flags_len
= cpu_to_le32(blen
);
4687 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
4696 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4700 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4701 * @qc: Metadata associated with taskfile to check
4703 * Allow low-level driver to filter ATA PACKET commands, returning
4704 * a status indicating whether or not it is OK to use DMA for the
4705 * supplied PACKET command.
4708 * spin_lock_irqsave(host lock)
4710 * RETURNS: 0 when ATAPI DMA can be used
4713 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4715 struct ata_port
*ap
= qc
->ap
;
4717 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4718 * few ATAPI devices choke on such DMA requests.
4720 if (unlikely(qc
->nbytes
& 15))
4723 if (ap
->ops
->check_atapi_dma
)
4724 return ap
->ops
->check_atapi_dma(qc
);
4730 * ata_std_qc_defer - Check whether a qc needs to be deferred
4731 * @qc: ATA command in question
4733 * Non-NCQ commands cannot run with any other command, NCQ or
4734 * not. As upper layer only knows the queue depth, we are
4735 * responsible for maintaining exclusion. This function checks
4736 * whether a new command @qc can be issued.
4739 * spin_lock_irqsave(host lock)
4742 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4744 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4746 struct ata_link
*link
= qc
->dev
->link
;
4748 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4749 if (!ata_tag_valid(link
->active_tag
))
4752 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4756 return ATA_DEFER_LINK
;
4760 * ata_qc_prep - Prepare taskfile for submission
4761 * @qc: Metadata associated with taskfile to be prepared
4763 * Prepare ATA taskfile for submission.
4766 * spin_lock_irqsave(host lock)
4768 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4770 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4777 * ata_dumb_qc_prep - Prepare taskfile for submission
4778 * @qc: Metadata associated with taskfile to be prepared
4780 * Prepare ATA taskfile for submission.
4783 * spin_lock_irqsave(host lock)
4785 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4787 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4790 ata_fill_sg_dumb(qc
);
4793 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4796 * ata_sg_init_one - Associate command with memory buffer
4797 * @qc: Command to be associated
4798 * @buf: Memory buffer
4799 * @buflen: Length of memory buffer, in bytes.
4801 * Initialize the data-related elements of queued_cmd @qc
4802 * to point to a single memory buffer, @buf of byte length @buflen.
4805 * spin_lock_irqsave(host lock)
4808 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
4810 qc
->flags
|= ATA_QCFLAG_SINGLE
;
4812 qc
->__sg
= &qc
->sgent
;
4814 qc
->orig_n_elem
= 1;
4816 qc
->nbytes
= buflen
;
4817 qc
->cursg
= qc
->__sg
;
4819 sg_init_one(&qc
->sgent
, buf
, buflen
);
4823 * ata_sg_init - Associate command with scatter-gather table.
4824 * @qc: Command to be associated
4825 * @sg: Scatter-gather table.
4826 * @n_elem: Number of elements in s/g table.
4828 * Initialize the data-related elements of queued_cmd @qc
4829 * to point to a scatter-gather table @sg, containing @n_elem
4833 * spin_lock_irqsave(host lock)
4836 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4837 unsigned int n_elem
)
4839 qc
->flags
|= ATA_QCFLAG_SG
;
4841 qc
->n_elem
= n_elem
;
4842 qc
->orig_n_elem
= n_elem
;
4843 qc
->cursg
= qc
->__sg
;
4847 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4848 * @qc: Command with memory buffer to be mapped.
4850 * DMA-map the memory buffer associated with queued_cmd @qc.
4853 * spin_lock_irqsave(host lock)
4856 * Zero on success, negative on error.
4859 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
4861 struct ata_port
*ap
= qc
->ap
;
4862 int dir
= qc
->dma_dir
;
4863 struct scatterlist
*sg
= qc
->__sg
;
4864 dma_addr_t dma_address
;
4867 /* we must lengthen transfers to end on a 32-bit boundary */
4868 qc
->pad_len
= sg
->length
& 3;
4870 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4871 struct scatterlist
*psg
= &qc
->pad_sgent
;
4873 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4875 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4877 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
4878 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
4881 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4882 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4884 sg
->length
-= qc
->pad_len
;
4885 if (sg
->length
== 0)
4888 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4889 sg
->length
, qc
->pad_len
);
4897 dma_address
= dma_map_single(ap
->dev
, qc
->buf_virt
,
4899 if (dma_mapping_error(dma_address
)) {
4901 sg
->length
+= qc
->pad_len
;
4905 sg_dma_address(sg
) = dma_address
;
4906 sg_dma_len(sg
) = sg
->length
;
4909 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
4910 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
4916 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4917 * @qc: Command with scatter-gather table to be mapped.
4919 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4922 * spin_lock_irqsave(host lock)
4925 * Zero on success, negative on error.
4929 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4931 struct ata_port
*ap
= qc
->ap
;
4932 struct scatterlist
*sg
= qc
->__sg
;
4933 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
4934 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
4936 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4937 WARN_ON(!(qc
->flags
& ATA_QCFLAG_SG
));
4939 /* we must lengthen transfers to end on a 32-bit boundary */
4940 qc
->pad_len
= lsg
->length
& 3;
4942 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4943 struct scatterlist
*psg
= &qc
->pad_sgent
;
4944 unsigned int offset
;
4946 WARN_ON(qc
->dev
->class != ATA_DEV_ATAPI
);
4948 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
4951 * psg->page/offset are used to copy to-be-written
4952 * data in this function or read data in ata_sg_clean.
4954 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
4955 sg_init_table(psg
, 1);
4956 sg_set_page(psg
, nth_page(sg_page(lsg
), offset
>> PAGE_SHIFT
),
4957 qc
->pad_len
, offset_in_page(offset
));
4959 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
4960 void *addr
= kmap_atomic(sg_page(psg
), KM_IRQ0
);
4961 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
4962 kunmap_atomic(addr
, KM_IRQ0
);
4965 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
4966 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
4968 lsg
->length
-= qc
->pad_len
;
4969 if (lsg
->length
== 0)
4972 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4973 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
4976 pre_n_elem
= qc
->n_elem
;
4977 if (trim_sg
&& pre_n_elem
)
4986 n_elem
= dma_map_sg(ap
->dev
, sg
, pre_n_elem
, dir
);
4988 /* restore last sg */
4989 lsg
->length
+= qc
->pad_len
;
4993 DPRINTK("%d sg elements mapped\n", n_elem
);
4996 qc
->n_elem
= n_elem
;
5002 * swap_buf_le16 - swap halves of 16-bit words in place
5003 * @buf: Buffer to swap
5004 * @buf_words: Number of 16-bit words in buffer.
5006 * Swap halves of 16-bit words if needed to convert from
5007 * little-endian byte order to native cpu byte order, or
5011 * Inherited from caller.
5013 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
5018 for (i
= 0; i
< buf_words
; i
++)
5019 buf
[i
] = le16_to_cpu(buf
[i
]);
5020 #endif /* __BIG_ENDIAN */
5024 * ata_data_xfer - Transfer data by PIO
5025 * @adev: device to target
5027 * @buflen: buffer length
5028 * @write_data: read/write
5030 * Transfer data from/to the device data register by PIO.
5033 * Inherited from caller.
5035 void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
5036 unsigned int buflen
, int write_data
)
5038 struct ata_port
*ap
= adev
->link
->ap
;
5039 unsigned int words
= buflen
>> 1;
5041 /* Transfer multiple of 2 bytes */
5043 iowrite16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
5045 ioread16_rep(ap
->ioaddr
.data_addr
, buf
, words
);
5047 /* Transfer trailing 1 byte, if any. */
5048 if (unlikely(buflen
& 0x01)) {
5049 u16 align_buf
[1] = { 0 };
5050 unsigned char *trailing_buf
= buf
+ buflen
- 1;
5053 memcpy(align_buf
, trailing_buf
, 1);
5054 iowrite16(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
5056 align_buf
[0] = cpu_to_le16(ioread16(ap
->ioaddr
.data_addr
));
5057 memcpy(trailing_buf
, align_buf
, 1);
5063 * ata_data_xfer_noirq - Transfer data by PIO
5064 * @adev: device to target
5066 * @buflen: buffer length
5067 * @write_data: read/write
5069 * Transfer data from/to the device data register by PIO. Do the
5070 * transfer with interrupts disabled.
5073 * Inherited from caller.
5075 void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
5076 unsigned int buflen
, int write_data
)
5078 unsigned long flags
;
5079 local_irq_save(flags
);
5080 ata_data_xfer(adev
, buf
, buflen
, write_data
);
5081 local_irq_restore(flags
);
5086 * ata_pio_sector - Transfer a sector of data.
5087 * @qc: Command on going
5089 * Transfer qc->sect_size bytes of data from/to the ATA device.
5092 * Inherited from caller.
5095 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
5097 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5098 struct ata_port
*ap
= qc
->ap
;
5100 unsigned int offset
;
5103 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
5104 ap
->hsm_task_state
= HSM_ST_LAST
;
5106 page
= sg_page(qc
->cursg
);
5107 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
5109 /* get the current page and offset */
5110 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5111 offset
%= PAGE_SIZE
;
5113 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5115 if (PageHighMem(page
)) {
5116 unsigned long flags
;
5118 /* FIXME: use a bounce buffer */
5119 local_irq_save(flags
);
5120 buf
= kmap_atomic(page
, KM_IRQ0
);
5122 /* do the actual data transfer */
5123 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5125 kunmap_atomic(buf
, KM_IRQ0
);
5126 local_irq_restore(flags
);
5128 buf
= page_address(page
);
5129 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5132 qc
->curbytes
+= qc
->sect_size
;
5133 qc
->cursg_ofs
+= qc
->sect_size
;
5135 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
5136 qc
->cursg
= sg_next(qc
->cursg
);
5142 * ata_pio_sectors - Transfer one or many sectors.
5143 * @qc: Command on going
5145 * Transfer one or many sectors of data from/to the
5146 * ATA device for the DRQ request.
5149 * Inherited from caller.
5152 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
5154 if (is_multi_taskfile(&qc
->tf
)) {
5155 /* READ/WRITE MULTIPLE */
5158 WARN_ON(qc
->dev
->multi_count
== 0);
5160 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
5161 qc
->dev
->multi_count
);
5167 ata_altstatus(qc
->ap
); /* flush */
5171 * atapi_send_cdb - Write CDB bytes to hardware
5172 * @ap: Port to which ATAPI device is attached.
5173 * @qc: Taskfile currently active
5175 * When device has indicated its readiness to accept
5176 * a CDB, this function is called. Send the CDB.
5182 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5185 DPRINTK("send cdb\n");
5186 WARN_ON(qc
->dev
->cdb_len
< 12);
5188 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
5189 ata_altstatus(ap
); /* flush */
5191 switch (qc
->tf
.protocol
) {
5192 case ATA_PROT_ATAPI
:
5193 ap
->hsm_task_state
= HSM_ST
;
5195 case ATA_PROT_ATAPI_NODATA
:
5196 ap
->hsm_task_state
= HSM_ST_LAST
;
5198 case ATA_PROT_ATAPI_DMA
:
5199 ap
->hsm_task_state
= HSM_ST_LAST
;
5200 /* initiate bmdma */
5201 ap
->ops
->bmdma_start(qc
);
5207 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5208 * @qc: Command on going
5209 * @bytes: number of bytes
5211 * Transfer Transfer data from/to the ATAPI device.
5214 * Inherited from caller.
5218 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
5220 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5221 struct scatterlist
*sg
= qc
->__sg
;
5222 struct scatterlist
*lsg
= sg_last(qc
->__sg
, qc
->n_elem
);
5223 struct ata_port
*ap
= qc
->ap
;
5226 unsigned int offset
, count
;
5229 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
5230 ap
->hsm_task_state
= HSM_ST_LAST
;
5233 if (unlikely(no_more_sg
)) {
5235 * The end of qc->sg is reached and the device expects
5236 * more data to transfer. In order not to overrun qc->sg
5237 * and fulfill length specified in the byte count register,
5238 * - for read case, discard trailing data from the device
5239 * - for write case, padding zero data to the device
5241 u16 pad_buf
[1] = { 0 };
5242 unsigned int words
= bytes
>> 1;
5245 if (words
) /* warning if bytes > 1 */
5246 ata_dev_printk(qc
->dev
, KERN_WARNING
,
5247 "%u bytes trailing data\n", bytes
);
5249 for (i
= 0; i
< words
; i
++)
5250 ap
->ops
->data_xfer(qc
->dev
, (unsigned char *)pad_buf
, 2, do_write
);
5252 ap
->hsm_task_state
= HSM_ST_LAST
;
5259 offset
= sg
->offset
+ qc
->cursg_ofs
;
5261 /* get the current page and offset */
5262 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5263 offset
%= PAGE_SIZE
;
5265 /* don't overrun current sg */
5266 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5268 /* don't cross page boundaries */
5269 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5271 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5273 if (PageHighMem(page
)) {
5274 unsigned long flags
;
5276 /* FIXME: use bounce buffer */
5277 local_irq_save(flags
);
5278 buf
= kmap_atomic(page
, KM_IRQ0
);
5280 /* do the actual data transfer */
5281 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5283 kunmap_atomic(buf
, KM_IRQ0
);
5284 local_irq_restore(flags
);
5286 buf
= page_address(page
);
5287 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, count
, do_write
);
5291 qc
->curbytes
+= count
;
5292 qc
->cursg_ofs
+= count
;
5294 if (qc
->cursg_ofs
== sg
->length
) {
5295 if (qc
->cursg
== lsg
)
5298 qc
->cursg
= sg_next(qc
->cursg
);
5307 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5308 * @qc: Command on going
5310 * Transfer Transfer data from/to the ATAPI device.
5313 * Inherited from caller.
5316 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5318 struct ata_port
*ap
= qc
->ap
;
5319 struct ata_device
*dev
= qc
->dev
;
5320 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5321 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5323 /* Abuse qc->result_tf for temp storage of intermediate TF
5324 * here to save some kernel stack usage.
5325 * For normal completion, qc->result_tf is not relevant. For
5326 * error, qc->result_tf is later overwritten by ata_qc_complete().
5327 * So, the correctness of qc->result_tf is not affected.
5329 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5330 ireason
= qc
->result_tf
.nsect
;
5331 bc_lo
= qc
->result_tf
.lbam
;
5332 bc_hi
= qc
->result_tf
.lbah
;
5333 bytes
= (bc_hi
<< 8) | bc_lo
;
5335 /* shall be cleared to zero, indicating xfer of data */
5336 if (ireason
& (1 << 0))
5339 /* make sure transfer direction matches expected */
5340 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5341 if (do_write
!= i_write
)
5344 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5346 __atapi_pio_bytes(qc
, bytes
);
5347 ata_altstatus(ap
); /* flush */
5352 ata_dev_printk(dev
, KERN_INFO
, "ATAPI check failed\n");
5353 qc
->err_mask
|= AC_ERR_HSM
;
5354 ap
->hsm_task_state
= HSM_ST_ERR
;
5358 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5359 * @ap: the target ata_port
5363 * 1 if ok in workqueue, 0 otherwise.
5366 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5368 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5371 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5372 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5373 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5376 if (is_atapi_taskfile(&qc
->tf
) &&
5377 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5385 * ata_hsm_qc_complete - finish a qc running on standard HSM
5386 * @qc: Command to complete
5387 * @in_wq: 1 if called from workqueue, 0 otherwise
5389 * Finish @qc which is running on standard HSM.
5392 * If @in_wq is zero, spin_lock_irqsave(host lock).
5393 * Otherwise, none on entry and grabs host lock.
5395 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5397 struct ata_port
*ap
= qc
->ap
;
5398 unsigned long flags
;
5400 if (ap
->ops
->error_handler
) {
5402 spin_lock_irqsave(ap
->lock
, flags
);
5404 /* EH might have kicked in while host lock is
5407 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5409 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5410 ap
->ops
->irq_on(ap
);
5411 ata_qc_complete(qc
);
5413 ata_port_freeze(ap
);
5416 spin_unlock_irqrestore(ap
->lock
, flags
);
5418 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5419 ata_qc_complete(qc
);
5421 ata_port_freeze(ap
);
5425 spin_lock_irqsave(ap
->lock
, flags
);
5426 ap
->ops
->irq_on(ap
);
5427 ata_qc_complete(qc
);
5428 spin_unlock_irqrestore(ap
->lock
, flags
);
5430 ata_qc_complete(qc
);
5435 * ata_hsm_move - move the HSM to the next state.
5436 * @ap: the target ata_port
5438 * @status: current device status
5439 * @in_wq: 1 if called from workqueue, 0 otherwise
5442 * 1 when poll next status needed, 0 otherwise.
5444 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5445 u8 status
, int in_wq
)
5447 unsigned long flags
= 0;
5450 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5452 /* Make sure ata_qc_issue_prot() does not throw things
5453 * like DMA polling into the workqueue. Notice that
5454 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5456 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5459 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5460 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5462 switch (ap
->hsm_task_state
) {
5464 /* Send first data block or PACKET CDB */
5466 /* If polling, we will stay in the work queue after
5467 * sending the data. Otherwise, interrupt handler
5468 * takes over after sending the data.
5470 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5472 /* check device status */
5473 if (unlikely((status
& ATA_DRQ
) == 0)) {
5474 /* handle BSY=0, DRQ=0 as error */
5475 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5476 /* device stops HSM for abort/error */
5477 qc
->err_mask
|= AC_ERR_DEV
;
5479 /* HSM violation. Let EH handle this */
5480 qc
->err_mask
|= AC_ERR_HSM
;
5482 ap
->hsm_task_state
= HSM_ST_ERR
;
5486 /* Device should not ask for data transfer (DRQ=1)
5487 * when it finds something wrong.
5488 * We ignore DRQ here and stop the HSM by
5489 * changing hsm_task_state to HSM_ST_ERR and
5490 * let the EH abort the command or reset the device.
5492 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5493 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with device "
5494 "error, dev_stat 0x%X\n", status
);
5495 qc
->err_mask
|= AC_ERR_HSM
;
5496 ap
->hsm_task_state
= HSM_ST_ERR
;
5500 /* Send the CDB (atapi) or the first data block (ata pio out).
5501 * During the state transition, interrupt handler shouldn't
5502 * be invoked before the data transfer is complete and
5503 * hsm_task_state is changed. Hence, the following locking.
5506 spin_lock_irqsave(ap
->lock
, flags
);
5508 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5509 /* PIO data out protocol.
5510 * send first data block.
5513 /* ata_pio_sectors() might change the state
5514 * to HSM_ST_LAST. so, the state is changed here
5515 * before ata_pio_sectors().
5517 ap
->hsm_task_state
= HSM_ST
;
5518 ata_pio_sectors(qc
);
5521 atapi_send_cdb(ap
, qc
);
5524 spin_unlock_irqrestore(ap
->lock
, flags
);
5526 /* if polling, ata_pio_task() handles the rest.
5527 * otherwise, interrupt handler takes over from here.
5532 /* complete command or read/write the data register */
5533 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
5534 /* ATAPI PIO protocol */
5535 if ((status
& ATA_DRQ
) == 0) {
5536 /* No more data to transfer or device error.
5537 * Device error will be tagged in HSM_ST_LAST.
5539 ap
->hsm_task_state
= HSM_ST_LAST
;
5543 /* Device should not ask for data transfer (DRQ=1)
5544 * when it finds something wrong.
5545 * We ignore DRQ here and stop the HSM by
5546 * changing hsm_task_state to HSM_ST_ERR and
5547 * let the EH abort the command or reset the device.
5549 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5550 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5551 "device error, dev_stat 0x%X\n",
5553 qc
->err_mask
|= AC_ERR_HSM
;
5554 ap
->hsm_task_state
= HSM_ST_ERR
;
5558 atapi_pio_bytes(qc
);
5560 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5561 /* bad ireason reported by device */
5565 /* ATA PIO protocol */
5566 if (unlikely((status
& ATA_DRQ
) == 0)) {
5567 /* handle BSY=0, DRQ=0 as error */
5568 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5569 /* device stops HSM for abort/error */
5570 qc
->err_mask
|= AC_ERR_DEV
;
5572 /* HSM violation. Let EH handle this.
5573 * Phantom devices also trigger this
5574 * condition. Mark hint.
5576 qc
->err_mask
|= AC_ERR_HSM
|
5579 ap
->hsm_task_state
= HSM_ST_ERR
;
5583 /* For PIO reads, some devices may ask for
5584 * data transfer (DRQ=1) alone with ERR=1.
5585 * We respect DRQ here and transfer one
5586 * block of junk data before changing the
5587 * hsm_task_state to HSM_ST_ERR.
5589 * For PIO writes, ERR=1 DRQ=1 doesn't make
5590 * sense since the data block has been
5591 * transferred to the device.
5593 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5594 /* data might be corrputed */
5595 qc
->err_mask
|= AC_ERR_DEV
;
5597 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5598 ata_pio_sectors(qc
);
5599 status
= ata_wait_idle(ap
);
5602 if (status
& (ATA_BUSY
| ATA_DRQ
))
5603 qc
->err_mask
|= AC_ERR_HSM
;
5605 /* ata_pio_sectors() might change the
5606 * state to HSM_ST_LAST. so, the state
5607 * is changed after ata_pio_sectors().
5609 ap
->hsm_task_state
= HSM_ST_ERR
;
5613 ata_pio_sectors(qc
);
5615 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5616 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5618 status
= ata_wait_idle(ap
);
5627 if (unlikely(!ata_ok(status
))) {
5628 qc
->err_mask
|= __ac_err_mask(status
);
5629 ap
->hsm_task_state
= HSM_ST_ERR
;
5633 /* no more data to transfer */
5634 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5635 ap
->print_id
, qc
->dev
->devno
, status
);
5637 WARN_ON(qc
->err_mask
);
5639 ap
->hsm_task_state
= HSM_ST_IDLE
;
5641 /* complete taskfile transaction */
5642 ata_hsm_qc_complete(qc
, in_wq
);
5648 /* make sure qc->err_mask is available to
5649 * know what's wrong and recover
5651 WARN_ON(qc
->err_mask
== 0);
5653 ap
->hsm_task_state
= HSM_ST_IDLE
;
5655 /* complete taskfile transaction */
5656 ata_hsm_qc_complete(qc
, in_wq
);
5668 static void ata_pio_task(struct work_struct
*work
)
5670 struct ata_port
*ap
=
5671 container_of(work
, struct ata_port
, port_task
.work
);
5672 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5677 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5680 * This is purely heuristic. This is a fast path.
5681 * Sometimes when we enter, BSY will be cleared in
5682 * a chk-status or two. If not, the drive is probably seeking
5683 * or something. Snooze for a couple msecs, then
5684 * chk-status again. If still busy, queue delayed work.
5686 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5687 if (status
& ATA_BUSY
) {
5689 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5690 if (status
& ATA_BUSY
) {
5691 ata_port_queue_task(ap
, ata_pio_task
, qc
, ATA_SHORT_PAUSE
);
5697 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5699 /* another command or interrupt handler
5700 * may be running at this point.
5707 * ata_qc_new - Request an available ATA command, for queueing
5708 * @ap: Port associated with device @dev
5709 * @dev: Device from whom we request an available command structure
5715 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5717 struct ata_queued_cmd
*qc
= NULL
;
5720 /* no command while frozen */
5721 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5724 /* the last tag is reserved for internal command. */
5725 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5726 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5727 qc
= __ata_qc_from_tag(ap
, i
);
5738 * ata_qc_new_init - Request an available ATA command, and initialize it
5739 * @dev: Device from whom we request an available command structure
5745 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5747 struct ata_port
*ap
= dev
->link
->ap
;
5748 struct ata_queued_cmd
*qc
;
5750 qc
= ata_qc_new(ap
);
5763 * ata_qc_free - free unused ata_queued_cmd
5764 * @qc: Command to complete
5766 * Designed to free unused ata_queued_cmd object
5767 * in case something prevents using it.
5770 * spin_lock_irqsave(host lock)
5772 void ata_qc_free(struct ata_queued_cmd
*qc
)
5774 struct ata_port
*ap
= qc
->ap
;
5777 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5781 if (likely(ata_tag_valid(tag
))) {
5782 qc
->tag
= ATA_TAG_POISON
;
5783 clear_bit(tag
, &ap
->qc_allocated
);
5787 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5789 struct ata_port
*ap
= qc
->ap
;
5790 struct ata_link
*link
= qc
->dev
->link
;
5792 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5793 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5795 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5798 /* command should be marked inactive atomically with qc completion */
5799 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5800 link
->sactive
&= ~(1 << qc
->tag
);
5802 ap
->nr_active_links
--;
5804 link
->active_tag
= ATA_TAG_POISON
;
5805 ap
->nr_active_links
--;
5808 /* clear exclusive status */
5809 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5810 ap
->excl_link
== link
))
5811 ap
->excl_link
= NULL
;
5813 /* atapi: mark qc as inactive to prevent the interrupt handler
5814 * from completing the command twice later, before the error handler
5815 * is called. (when rc != 0 and atapi request sense is needed)
5817 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5818 ap
->qc_active
&= ~(1 << qc
->tag
);
5820 /* call completion callback */
5821 qc
->complete_fn(qc
);
5824 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5826 struct ata_port
*ap
= qc
->ap
;
5828 qc
->result_tf
.flags
= qc
->tf
.flags
;
5829 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5833 * ata_qc_complete - Complete an active ATA command
5834 * @qc: Command to complete
5835 * @err_mask: ATA Status register contents
5837 * Indicate to the mid and upper layers that an ATA
5838 * command has completed, with either an ok or not-ok status.
5841 * spin_lock_irqsave(host lock)
5843 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5845 struct ata_port
*ap
= qc
->ap
;
5847 /* XXX: New EH and old EH use different mechanisms to
5848 * synchronize EH with regular execution path.
5850 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5851 * Normal execution path is responsible for not accessing a
5852 * failed qc. libata core enforces the rule by returning NULL
5853 * from ata_qc_from_tag() for failed qcs.
5855 * Old EH depends on ata_qc_complete() nullifying completion
5856 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5857 * not synchronize with interrupt handler. Only PIO task is
5860 if (ap
->ops
->error_handler
) {
5861 struct ata_device
*dev
= qc
->dev
;
5862 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5864 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5866 if (unlikely(qc
->err_mask
))
5867 qc
->flags
|= ATA_QCFLAG_FAILED
;
5869 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5870 if (!ata_tag_internal(qc
->tag
)) {
5871 /* always fill result TF for failed qc */
5873 ata_qc_schedule_eh(qc
);
5878 /* read result TF if requested */
5879 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5882 /* Some commands need post-processing after successful
5885 switch (qc
->tf
.command
) {
5886 case ATA_CMD_SET_FEATURES
:
5887 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5888 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5891 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5892 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5893 /* revalidate device */
5894 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5895 ata_port_schedule_eh(ap
);
5899 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5903 __ata_qc_complete(qc
);
5905 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5908 /* read result TF if failed or requested */
5909 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5912 __ata_qc_complete(qc
);
5917 * ata_qc_complete_multiple - Complete multiple qcs successfully
5918 * @ap: port in question
5919 * @qc_active: new qc_active mask
5920 * @finish_qc: LLDD callback invoked before completing a qc
5922 * Complete in-flight commands. This functions is meant to be
5923 * called from low-level driver's interrupt routine to complete
5924 * requests normally. ap->qc_active and @qc_active is compared
5925 * and commands are completed accordingly.
5928 * spin_lock_irqsave(host lock)
5931 * Number of completed commands on success, -errno otherwise.
5933 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5934 void (*finish_qc
)(struct ata_queued_cmd
*))
5940 done_mask
= ap
->qc_active
^ qc_active
;
5942 if (unlikely(done_mask
& qc_active
)) {
5943 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5944 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5948 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5949 struct ata_queued_cmd
*qc
;
5951 if (!(done_mask
& (1 << i
)))
5954 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5957 ata_qc_complete(qc
);
5965 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
5967 struct ata_port
*ap
= qc
->ap
;
5969 switch (qc
->tf
.protocol
) {
5972 case ATA_PROT_ATAPI_DMA
:
5975 case ATA_PROT_ATAPI
:
5977 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
5990 * ata_qc_issue - issue taskfile to device
5991 * @qc: command to issue to device
5993 * Prepare an ATA command to submission to device.
5994 * This includes mapping the data into a DMA-able
5995 * area, filling in the S/G table, and finally
5996 * writing the taskfile to hardware, starting the command.
5999 * spin_lock_irqsave(host lock)
6001 void ata_qc_issue(struct ata_queued_cmd
*qc
)
6003 struct ata_port
*ap
= qc
->ap
;
6004 struct ata_link
*link
= qc
->dev
->link
;
6006 /* Make sure only one non-NCQ command is outstanding. The
6007 * check is skipped for old EH because it reuses active qc to
6008 * request ATAPI sense.
6010 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
6012 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
6013 WARN_ON(link
->sactive
& (1 << qc
->tag
));
6016 ap
->nr_active_links
++;
6017 link
->sactive
|= 1 << qc
->tag
;
6019 WARN_ON(link
->sactive
);
6021 ap
->nr_active_links
++;
6022 link
->active_tag
= qc
->tag
;
6025 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
6026 ap
->qc_active
|= 1 << qc
->tag
;
6028 if (ata_should_dma_map(qc
)) {
6029 if (qc
->flags
& ATA_QCFLAG_SG
) {
6030 if (ata_sg_setup(qc
))
6032 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
6033 if (ata_sg_setup_one(qc
))
6037 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6040 /* if device is sleeping, schedule softreset and abort the link */
6041 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
6042 link
->eh_info
.action
|= ATA_EH_SOFTRESET
;
6043 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
6044 ata_link_abort(link
);
6048 ap
->ops
->qc_prep(qc
);
6050 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
6051 if (unlikely(qc
->err_mask
))
6056 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
6057 qc
->err_mask
|= AC_ERR_SYSTEM
;
6059 ata_qc_complete(qc
);
6063 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6064 * @qc: command to issue to device
6066 * Using various libata functions and hooks, this function
6067 * starts an ATA command. ATA commands are grouped into
6068 * classes called "protocols", and issuing each type of protocol
6069 * is slightly different.
6071 * May be used as the qc_issue() entry in ata_port_operations.
6074 * spin_lock_irqsave(host lock)
6077 * Zero on success, AC_ERR_* mask on failure
6080 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
6082 struct ata_port
*ap
= qc
->ap
;
6084 /* Use polling pio if the LLD doesn't handle
6085 * interrupt driven pio and atapi CDB interrupt.
6087 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
6088 switch (qc
->tf
.protocol
) {
6090 case ATA_PROT_NODATA
:
6091 case ATA_PROT_ATAPI
:
6092 case ATA_PROT_ATAPI_NODATA
:
6093 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
6095 case ATA_PROT_ATAPI_DMA
:
6096 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
6097 /* see ata_dma_blacklisted() */
6105 /* select the device */
6106 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
6108 /* start the command */
6109 switch (qc
->tf
.protocol
) {
6110 case ATA_PROT_NODATA
:
6111 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6112 ata_qc_set_polling(qc
);
6114 ata_tf_to_host(ap
, &qc
->tf
);
6115 ap
->hsm_task_state
= HSM_ST_LAST
;
6117 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6118 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6123 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6125 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6126 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6127 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
6128 ap
->hsm_task_state
= HSM_ST_LAST
;
6132 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6133 ata_qc_set_polling(qc
);
6135 ata_tf_to_host(ap
, &qc
->tf
);
6137 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
6138 /* PIO data out protocol */
6139 ap
->hsm_task_state
= HSM_ST_FIRST
;
6140 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6142 /* always send first data block using
6143 * the ata_pio_task() codepath.
6146 /* PIO data in protocol */
6147 ap
->hsm_task_state
= HSM_ST
;
6149 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6150 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6152 /* if polling, ata_pio_task() handles the rest.
6153 * otherwise, interrupt handler takes over from here.
6159 case ATA_PROT_ATAPI
:
6160 case ATA_PROT_ATAPI_NODATA
:
6161 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6162 ata_qc_set_polling(qc
);
6164 ata_tf_to_host(ap
, &qc
->tf
);
6166 ap
->hsm_task_state
= HSM_ST_FIRST
;
6168 /* send cdb by polling if no cdb interrupt */
6169 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
6170 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
6171 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6174 case ATA_PROT_ATAPI_DMA
:
6175 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6177 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6178 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6179 ap
->hsm_task_state
= HSM_ST_FIRST
;
6181 /* send cdb by polling if no cdb interrupt */
6182 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6183 ata_port_queue_task(ap
, ata_pio_task
, qc
, 0);
6188 return AC_ERR_SYSTEM
;
6195 * ata_host_intr - Handle host interrupt for given (port, task)
6196 * @ap: Port on which interrupt arrived (possibly...)
6197 * @qc: Taskfile currently active in engine
6199 * Handle host interrupt for given queued command. Currently,
6200 * only DMA interrupts are handled. All other commands are
6201 * handled via polling with interrupts disabled (nIEN bit).
6204 * spin_lock_irqsave(host lock)
6207 * One if interrupt was handled, zero if not (shared irq).
6210 inline unsigned int ata_host_intr(struct ata_port
*ap
,
6211 struct ata_queued_cmd
*qc
)
6213 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6214 u8 status
, host_stat
= 0;
6216 VPRINTK("ata%u: protocol %d task_state %d\n",
6217 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
6219 /* Check whether we are expecting interrupt in this state */
6220 switch (ap
->hsm_task_state
) {
6222 /* Some pre-ATAPI-4 devices assert INTRQ
6223 * at this state when ready to receive CDB.
6226 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6227 * The flag was turned on only for atapi devices.
6228 * No need to check is_atapi_taskfile(&qc->tf) again.
6230 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6234 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6235 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
6236 /* check status of DMA engine */
6237 host_stat
= ap
->ops
->bmdma_status(ap
);
6238 VPRINTK("ata%u: host_stat 0x%X\n",
6239 ap
->print_id
, host_stat
);
6241 /* if it's not our irq... */
6242 if (!(host_stat
& ATA_DMA_INTR
))
6245 /* before we do anything else, clear DMA-Start bit */
6246 ap
->ops
->bmdma_stop(qc
);
6248 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6249 /* error when transfering data to/from memory */
6250 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6251 ap
->hsm_task_state
= HSM_ST_ERR
;
6261 /* check altstatus */
6262 status
= ata_altstatus(ap
);
6263 if (status
& ATA_BUSY
)
6266 /* check main status, clearing INTRQ */
6267 status
= ata_chk_status(ap
);
6268 if (unlikely(status
& ATA_BUSY
))
6271 /* ack bmdma irq events */
6272 ap
->ops
->irq_clear(ap
);
6274 ata_hsm_move(ap
, qc
, status
, 0);
6276 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6277 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
))
6278 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6280 return 1; /* irq handled */
6283 ap
->stats
.idle_irq
++;
6286 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6288 ap
->ops
->irq_clear(ap
);
6289 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6293 return 0; /* irq not handled */
6297 * ata_interrupt - Default ATA host interrupt handler
6298 * @irq: irq line (unused)
6299 * @dev_instance: pointer to our ata_host information structure
6301 * Default interrupt handler for PCI IDE devices. Calls
6302 * ata_host_intr() for each port that is not disabled.
6305 * Obtains host lock during operation.
6308 * IRQ_NONE or IRQ_HANDLED.
6311 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6313 struct ata_host
*host
= dev_instance
;
6315 unsigned int handled
= 0;
6316 unsigned long flags
;
6318 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6319 spin_lock_irqsave(&host
->lock
, flags
);
6321 for (i
= 0; i
< host
->n_ports
; i
++) {
6322 struct ata_port
*ap
;
6324 ap
= host
->ports
[i
];
6326 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6327 struct ata_queued_cmd
*qc
;
6329 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6330 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6331 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6332 handled
|= ata_host_intr(ap
, qc
);
6336 spin_unlock_irqrestore(&host
->lock
, flags
);
6338 return IRQ_RETVAL(handled
);
6342 * sata_scr_valid - test whether SCRs are accessible
6343 * @link: ATA link to test SCR accessibility for
6345 * Test whether SCRs are accessible for @link.
6351 * 1 if SCRs are accessible, 0 otherwise.
6353 int sata_scr_valid(struct ata_link
*link
)
6355 struct ata_port
*ap
= link
->ap
;
6357 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6361 * sata_scr_read - read SCR register of the specified port
6362 * @link: ATA link to read SCR for
6364 * @val: Place to store read value
6366 * Read SCR register @reg of @link into *@val. This function is
6367 * guaranteed to succeed if @link is ap->link, the cable type of
6368 * the port is SATA and the port implements ->scr_read.
6371 * None if @link is ap->link. Kernel thread context otherwise.
6374 * 0 on success, negative errno on failure.
6376 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6378 if (ata_is_host_link(link
)) {
6379 struct ata_port
*ap
= link
->ap
;
6381 if (sata_scr_valid(link
))
6382 return ap
->ops
->scr_read(ap
, reg
, val
);
6386 return sata_pmp_scr_read(link
, reg
, val
);
6390 * sata_scr_write - write SCR register of the specified port
6391 * @link: ATA link to write SCR for
6392 * @reg: SCR to write
6393 * @val: value to write
6395 * Write @val to SCR register @reg of @link. This function is
6396 * guaranteed to succeed if @link is ap->link, the cable type of
6397 * the port is SATA and the port implements ->scr_read.
6400 * None if @link is ap->link. Kernel thread context otherwise.
6403 * 0 on success, negative errno on failure.
6405 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6407 if (ata_is_host_link(link
)) {
6408 struct ata_port
*ap
= link
->ap
;
6410 if (sata_scr_valid(link
))
6411 return ap
->ops
->scr_write(ap
, reg
, val
);
6415 return sata_pmp_scr_write(link
, reg
, val
);
6419 * sata_scr_write_flush - write SCR register of the specified port and flush
6420 * @link: ATA link to write SCR for
6421 * @reg: SCR to write
6422 * @val: value to write
6424 * This function is identical to sata_scr_write() except that this
6425 * function performs flush after writing to the register.
6428 * None if @link is ap->link. Kernel thread context otherwise.
6431 * 0 on success, negative errno on failure.
6433 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6435 if (ata_is_host_link(link
)) {
6436 struct ata_port
*ap
= link
->ap
;
6439 if (sata_scr_valid(link
)) {
6440 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6442 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6448 return sata_pmp_scr_write(link
, reg
, val
);
6452 * ata_link_online - test whether the given link is online
6453 * @link: ATA link to test
6455 * Test whether @link is online. Note that this function returns
6456 * 0 if online status of @link cannot be obtained, so
6457 * ata_link_online(link) != !ata_link_offline(link).
6463 * 1 if the port online status is available and online.
6465 int ata_link_online(struct ata_link
*link
)
6469 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6470 (sstatus
& 0xf) == 0x3)
6476 * ata_link_offline - test whether the given link is offline
6477 * @link: ATA link to test
6479 * Test whether @link is offline. Note that this function
6480 * returns 0 if offline status of @link cannot be obtained, so
6481 * ata_link_online(link) != !ata_link_offline(link).
6487 * 1 if the port offline status is available and offline.
6489 int ata_link_offline(struct ata_link
*link
)
6493 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6494 (sstatus
& 0xf) != 0x3)
6499 int ata_flush_cache(struct ata_device
*dev
)
6501 unsigned int err_mask
;
6504 if (!ata_try_flush_cache(dev
))
6507 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6508 cmd
= ATA_CMD_FLUSH_EXT
;
6510 cmd
= ATA_CMD_FLUSH
;
6512 /* This is wrong. On a failed flush we get back the LBA of the lost
6513 sector and we should (assuming it wasn't aborted as unknown) issue
6514 a further flush command to continue the writeback until it
6516 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6518 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6526 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6527 unsigned int action
, unsigned int ehi_flags
,
6530 unsigned long flags
;
6533 for (i
= 0; i
< host
->n_ports
; i
++) {
6534 struct ata_port
*ap
= host
->ports
[i
];
6535 struct ata_link
*link
;
6537 /* Previous resume operation might still be in
6538 * progress. Wait for PM_PENDING to clear.
6540 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6541 ata_port_wait_eh(ap
);
6542 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6545 /* request PM ops to EH */
6546 spin_lock_irqsave(ap
->lock
, flags
);
6551 ap
->pm_result
= &rc
;
6554 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6555 __ata_port_for_each_link(link
, ap
) {
6556 link
->eh_info
.action
|= action
;
6557 link
->eh_info
.flags
|= ehi_flags
;
6560 ata_port_schedule_eh(ap
);
6562 spin_unlock_irqrestore(ap
->lock
, flags
);
6564 /* wait and check result */
6566 ata_port_wait_eh(ap
);
6567 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6577 * ata_host_suspend - suspend host
6578 * @host: host to suspend
6581 * Suspend @host. Actual operation is performed by EH. This
6582 * function requests EH to perform PM operations and waits for EH
6586 * Kernel thread context (may sleep).
6589 * 0 on success, -errno on failure.
6591 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6596 * disable link pm on all ports before requesting
6599 ata_lpm_enable(host
);
6601 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6603 host
->dev
->power
.power_state
= mesg
;
6608 * ata_host_resume - resume host
6609 * @host: host to resume
6611 * Resume @host. Actual operation is performed by EH. This
6612 * function requests EH to perform PM operations and returns.
6613 * Note that all resume operations are performed parallely.
6616 * Kernel thread context (may sleep).
6618 void ata_host_resume(struct ata_host
*host
)
6620 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6621 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6622 host
->dev
->power
.power_state
= PMSG_ON
;
6624 /* reenable link pm */
6625 ata_lpm_disable(host
);
6630 * ata_port_start - Set port up for dma.
6631 * @ap: Port to initialize
6633 * Called just after data structures for each port are
6634 * initialized. Allocates space for PRD table.
6636 * May be used as the port_start() entry in ata_port_operations.
6639 * Inherited from caller.
6641 int ata_port_start(struct ata_port
*ap
)
6643 struct device
*dev
= ap
->dev
;
6646 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6651 rc
= ata_pad_alloc(ap
, dev
);
6655 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
,
6656 (unsigned long long)ap
->prd_dma
);
6661 * ata_dev_init - Initialize an ata_device structure
6662 * @dev: Device structure to initialize
6664 * Initialize @dev in preparation for probing.
6667 * Inherited from caller.
6669 void ata_dev_init(struct ata_device
*dev
)
6671 struct ata_link
*link
= dev
->link
;
6672 struct ata_port
*ap
= link
->ap
;
6673 unsigned long flags
;
6675 /* SATA spd limit is bound to the first device */
6676 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6679 /* High bits of dev->flags are used to record warm plug
6680 * requests which occur asynchronously. Synchronize using
6683 spin_lock_irqsave(ap
->lock
, flags
);
6684 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6686 spin_unlock_irqrestore(ap
->lock
, flags
);
6688 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6689 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6690 dev
->pio_mask
= UINT_MAX
;
6691 dev
->mwdma_mask
= UINT_MAX
;
6692 dev
->udma_mask
= UINT_MAX
;
6696 * ata_link_init - Initialize an ata_link structure
6697 * @ap: ATA port link is attached to
6698 * @link: Link structure to initialize
6699 * @pmp: Port multiplier port number
6704 * Kernel thread context (may sleep)
6706 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6710 /* clear everything except for devices */
6711 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6715 link
->active_tag
= ATA_TAG_POISON
;
6716 link
->hw_sata_spd_limit
= UINT_MAX
;
6718 /* can't use iterator, ap isn't initialized yet */
6719 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6720 struct ata_device
*dev
= &link
->device
[i
];
6723 dev
->devno
= dev
- link
->device
;
6729 * sata_link_init_spd - Initialize link->sata_spd_limit
6730 * @link: Link to configure sata_spd_limit for
6732 * Initialize @link->[hw_]sata_spd_limit to the currently
6736 * Kernel thread context (may sleep).
6739 * 0 on success, -errno on failure.
6741 int sata_link_init_spd(struct ata_link
*link
)
6746 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6750 spd
= (scontrol
>> 4) & 0xf;
6752 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6754 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6760 * ata_port_alloc - allocate and initialize basic ATA port resources
6761 * @host: ATA host this allocated port belongs to
6763 * Allocate and initialize basic ATA port resources.
6766 * Allocate ATA port on success, NULL on failure.
6769 * Inherited from calling layer (may sleep).
6771 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6773 struct ata_port
*ap
;
6777 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6781 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6782 ap
->lock
= &host
->lock
;
6783 ap
->flags
= ATA_FLAG_DISABLED
;
6785 ap
->ctl
= ATA_DEVCTL_OBS
;
6787 ap
->dev
= host
->dev
;
6788 ap
->last_ctl
= 0xFF;
6790 #if defined(ATA_VERBOSE_DEBUG)
6791 /* turn on all debugging levels */
6792 ap
->msg_enable
= 0x00FF;
6793 #elif defined(ATA_DEBUG)
6794 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6796 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6799 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
6800 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6801 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6802 INIT_LIST_HEAD(&ap
->eh_done_q
);
6803 init_waitqueue_head(&ap
->eh_wait_q
);
6804 init_timer_deferrable(&ap
->fastdrain_timer
);
6805 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6806 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6808 ap
->cbl
= ATA_CBL_NONE
;
6810 ata_link_init(ap
, &ap
->link
, 0);
6813 ap
->stats
.unhandled_irq
= 1;
6814 ap
->stats
.idle_irq
= 1;
6819 static void ata_host_release(struct device
*gendev
, void *res
)
6821 struct ata_host
*host
= dev_get_drvdata(gendev
);
6824 for (i
= 0; i
< host
->n_ports
; i
++) {
6825 struct ata_port
*ap
= host
->ports
[i
];
6831 scsi_host_put(ap
->scsi_host
);
6833 kfree(ap
->pmp_link
);
6835 host
->ports
[i
] = NULL
;
6838 dev_set_drvdata(gendev
, NULL
);
6842 * ata_host_alloc - allocate and init basic ATA host resources
6843 * @dev: generic device this host is associated with
6844 * @max_ports: maximum number of ATA ports associated with this host
6846 * Allocate and initialize basic ATA host resources. LLD calls
6847 * this function to allocate a host, initializes it fully and
6848 * attaches it using ata_host_register().
6850 * @max_ports ports are allocated and host->n_ports is
6851 * initialized to @max_ports. The caller is allowed to decrease
6852 * host->n_ports before calling ata_host_register(). The unused
6853 * ports will be automatically freed on registration.
6856 * Allocate ATA host on success, NULL on failure.
6859 * Inherited from calling layer (may sleep).
6861 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6863 struct ata_host
*host
;
6869 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6872 /* alloc a container for our list of ATA ports (buses) */
6873 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6874 /* alloc a container for our list of ATA ports (buses) */
6875 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6879 devres_add(dev
, host
);
6880 dev_set_drvdata(dev
, host
);
6882 spin_lock_init(&host
->lock
);
6884 host
->n_ports
= max_ports
;
6886 /* allocate ports bound to this host */
6887 for (i
= 0; i
< max_ports
; i
++) {
6888 struct ata_port
*ap
;
6890 ap
= ata_port_alloc(host
);
6895 host
->ports
[i
] = ap
;
6898 devres_remove_group(dev
, NULL
);
6902 devres_release_group(dev
, NULL
);
6907 * ata_host_alloc_pinfo - alloc host and init with port_info array
6908 * @dev: generic device this host is associated with
6909 * @ppi: array of ATA port_info to initialize host with
6910 * @n_ports: number of ATA ports attached to this host
6912 * Allocate ATA host and initialize with info from @ppi. If NULL
6913 * terminated, @ppi may contain fewer entries than @n_ports. The
6914 * last entry will be used for the remaining ports.
6917 * Allocate ATA host on success, NULL on failure.
6920 * Inherited from calling layer (may sleep).
6922 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6923 const struct ata_port_info
* const * ppi
,
6926 const struct ata_port_info
*pi
;
6927 struct ata_host
*host
;
6930 host
= ata_host_alloc(dev
, n_ports
);
6934 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6935 struct ata_port
*ap
= host
->ports
[i
];
6940 ap
->pio_mask
= pi
->pio_mask
;
6941 ap
->mwdma_mask
= pi
->mwdma_mask
;
6942 ap
->udma_mask
= pi
->udma_mask
;
6943 ap
->flags
|= pi
->flags
;
6944 ap
->link
.flags
|= pi
->link_flags
;
6945 ap
->ops
= pi
->port_ops
;
6947 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6948 host
->ops
= pi
->port_ops
;
6949 if (!host
->private_data
&& pi
->private_data
)
6950 host
->private_data
= pi
->private_data
;
6956 static void ata_host_stop(struct device
*gendev
, void *res
)
6958 struct ata_host
*host
= dev_get_drvdata(gendev
);
6961 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
6963 for (i
= 0; i
< host
->n_ports
; i
++) {
6964 struct ata_port
*ap
= host
->ports
[i
];
6966 if (ap
->ops
->port_stop
)
6967 ap
->ops
->port_stop(ap
);
6970 if (host
->ops
->host_stop
)
6971 host
->ops
->host_stop(host
);
6975 * ata_host_start - start and freeze ports of an ATA host
6976 * @host: ATA host to start ports for
6978 * Start and then freeze ports of @host. Started status is
6979 * recorded in host->flags, so this function can be called
6980 * multiple times. Ports are guaranteed to get started only
6981 * once. If host->ops isn't initialized yet, its set to the
6982 * first non-dummy port ops.
6985 * Inherited from calling layer (may sleep).
6988 * 0 if all ports are started successfully, -errno otherwise.
6990 int ata_host_start(struct ata_host
*host
)
6993 void *start_dr
= NULL
;
6996 if (host
->flags
& ATA_HOST_STARTED
)
6999 for (i
= 0; i
< host
->n_ports
; i
++) {
7000 struct ata_port
*ap
= host
->ports
[i
];
7002 if (!host
->ops
&& !ata_port_is_dummy(ap
))
7003 host
->ops
= ap
->ops
;
7005 if (ap
->ops
->port_stop
)
7009 if (host
->ops
->host_stop
)
7013 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
7018 for (i
= 0; i
< host
->n_ports
; i
++) {
7019 struct ata_port
*ap
= host
->ports
[i
];
7021 if (ap
->ops
->port_start
) {
7022 rc
= ap
->ops
->port_start(ap
);
7024 ata_port_printk(ap
, KERN_ERR
, "failed to "
7025 "start port (errno=%d)\n", rc
);
7030 ata_eh_freeze_port(ap
);
7034 devres_add(host
->dev
, start_dr
);
7035 host
->flags
|= ATA_HOST_STARTED
;
7040 struct ata_port
*ap
= host
->ports
[i
];
7042 if (ap
->ops
->port_stop
)
7043 ap
->ops
->port_stop(ap
);
7045 devres_free(start_dr
);
7050 * ata_sas_host_init - Initialize a host struct
7051 * @host: host to initialize
7052 * @dev: device host is attached to
7053 * @flags: host flags
7057 * PCI/etc. bus probe sem.
7060 /* KILLME - the only user left is ipr */
7061 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
7062 unsigned long flags
, const struct ata_port_operations
*ops
)
7064 spin_lock_init(&host
->lock
);
7066 host
->flags
= flags
;
7071 * ata_host_register - register initialized ATA host
7072 * @host: ATA host to register
7073 * @sht: template for SCSI host
7075 * Register initialized ATA host. @host is allocated using
7076 * ata_host_alloc() and fully initialized by LLD. This function
7077 * starts ports, registers @host with ATA and SCSI layers and
7078 * probe registered devices.
7081 * Inherited from calling layer (may sleep).
7084 * 0 on success, -errno otherwise.
7086 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
7090 /* host must have been started */
7091 if (!(host
->flags
& ATA_HOST_STARTED
)) {
7092 dev_printk(KERN_ERR
, host
->dev
,
7093 "BUG: trying to register unstarted host\n");
7098 /* Blow away unused ports. This happens when LLD can't
7099 * determine the exact number of ports to allocate at
7102 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
7103 kfree(host
->ports
[i
]);
7105 /* give ports names and add SCSI hosts */
7106 for (i
= 0; i
< host
->n_ports
; i
++)
7107 host
->ports
[i
]->print_id
= ata_print_id
++;
7109 rc
= ata_scsi_add_hosts(host
, sht
);
7113 /* associate with ACPI nodes */
7114 ata_acpi_associate(host
);
7116 /* set cable, sata_spd_limit and report */
7117 for (i
= 0; i
< host
->n_ports
; i
++) {
7118 struct ata_port
*ap
= host
->ports
[i
];
7119 unsigned long xfer_mask
;
7121 /* set SATA cable type if still unset */
7122 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
7123 ap
->cbl
= ATA_CBL_SATA
;
7125 /* init sata_spd_limit to the current value */
7126 sata_link_init_spd(&ap
->link
);
7128 /* print per-port info to dmesg */
7129 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
7132 if (!ata_port_is_dummy(ap
)) {
7133 ata_port_printk(ap
, KERN_INFO
,
7134 "%cATA max %s %s\n",
7135 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
7136 ata_mode_string(xfer_mask
),
7137 ap
->link
.eh_info
.desc
);
7138 ata_ehi_clear_desc(&ap
->link
.eh_info
);
7140 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
7143 /* perform each probe synchronously */
7144 DPRINTK("probe begin\n");
7145 for (i
= 0; i
< host
->n_ports
; i
++) {
7146 struct ata_port
*ap
= host
->ports
[i
];
7150 if (ap
->ops
->error_handler
) {
7151 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
7152 unsigned long flags
;
7156 /* kick EH for boot probing */
7157 spin_lock_irqsave(ap
->lock
, flags
);
7160 (1 << ata_link_max_devices(&ap
->link
)) - 1;
7161 ehi
->action
|= ATA_EH_SOFTRESET
;
7162 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
7164 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
7165 ap
->pflags
|= ATA_PFLAG_LOADING
;
7166 ata_port_schedule_eh(ap
);
7168 spin_unlock_irqrestore(ap
->lock
, flags
);
7170 /* wait for EH to finish */
7171 ata_port_wait_eh(ap
);
7173 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
7174 rc
= ata_bus_probe(ap
);
7175 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
7178 /* FIXME: do something useful here?
7179 * Current libata behavior will
7180 * tear down everything when
7181 * the module is removed
7182 * or the h/w is unplugged.
7188 /* probes are done, now scan each port's disk(s) */
7189 DPRINTK("host probe begin\n");
7190 for (i
= 0; i
< host
->n_ports
; i
++) {
7191 struct ata_port
*ap
= host
->ports
[i
];
7193 ata_scsi_scan_host(ap
, 1);
7194 ata_lpm_schedule(ap
, ap
->pm_policy
);
7201 * ata_host_activate - start host, request IRQ and register it
7202 * @host: target ATA host
7203 * @irq: IRQ to request
7204 * @irq_handler: irq_handler used when requesting IRQ
7205 * @irq_flags: irq_flags used when requesting IRQ
7206 * @sht: scsi_host_template to use when registering the host
7208 * After allocating an ATA host and initializing it, most libata
7209 * LLDs perform three steps to activate the host - start host,
7210 * request IRQ and register it. This helper takes necessasry
7211 * arguments and performs the three steps in one go.
7213 * An invalid IRQ skips the IRQ registration and expects the host to
7214 * have set polling mode on the port. In this case, @irq_handler
7218 * Inherited from calling layer (may sleep).
7221 * 0 on success, -errno otherwise.
7223 int ata_host_activate(struct ata_host
*host
, int irq
,
7224 irq_handler_t irq_handler
, unsigned long irq_flags
,
7225 struct scsi_host_template
*sht
)
7229 rc
= ata_host_start(host
);
7233 /* Special case for polling mode */
7235 WARN_ON(irq_handler
);
7236 return ata_host_register(host
, sht
);
7239 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
7240 dev_driver_string(host
->dev
), host
);
7244 for (i
= 0; i
< host
->n_ports
; i
++)
7245 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
7247 rc
= ata_host_register(host
, sht
);
7248 /* if failed, just free the IRQ and leave ports alone */
7250 devm_free_irq(host
->dev
, irq
, host
);
7256 * ata_port_detach - Detach ATA port in prepration of device removal
7257 * @ap: ATA port to be detached
7259 * Detach all ATA devices and the associated SCSI devices of @ap;
7260 * then, remove the associated SCSI host. @ap is guaranteed to
7261 * be quiescent on return from this function.
7264 * Kernel thread context (may sleep).
7266 static void ata_port_detach(struct ata_port
*ap
)
7268 unsigned long flags
;
7269 struct ata_link
*link
;
7270 struct ata_device
*dev
;
7272 if (!ap
->ops
->error_handler
)
7275 /* tell EH we're leaving & flush EH */
7276 spin_lock_irqsave(ap
->lock
, flags
);
7277 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7278 spin_unlock_irqrestore(ap
->lock
, flags
);
7280 ata_port_wait_eh(ap
);
7282 /* EH is now guaranteed to see UNLOADING, so no new device
7283 * will be attached. Disable all existing devices.
7285 spin_lock_irqsave(ap
->lock
, flags
);
7287 ata_port_for_each_link(link
, ap
) {
7288 ata_link_for_each_dev(dev
, link
)
7289 ata_dev_disable(dev
);
7292 spin_unlock_irqrestore(ap
->lock
, flags
);
7294 /* Final freeze & EH. All in-flight commands are aborted. EH
7295 * will be skipped and retrials will be terminated with bad
7298 spin_lock_irqsave(ap
->lock
, flags
);
7299 ata_port_freeze(ap
); /* won't be thawed */
7300 spin_unlock_irqrestore(ap
->lock
, flags
);
7302 ata_port_wait_eh(ap
);
7303 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7306 /* remove the associated SCSI host */
7307 scsi_remove_host(ap
->scsi_host
);
7311 * ata_host_detach - Detach all ports of an ATA host
7312 * @host: Host to detach
7314 * Detach all ports of @host.
7317 * Kernel thread context (may sleep).
7319 void ata_host_detach(struct ata_host
*host
)
7323 for (i
= 0; i
< host
->n_ports
; i
++)
7324 ata_port_detach(host
->ports
[i
]);
7328 * ata_std_ports - initialize ioaddr with standard port offsets.
7329 * @ioaddr: IO address structure to be initialized
7331 * Utility function which initializes data_addr, error_addr,
7332 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7333 * device_addr, status_addr, and command_addr to standard offsets
7334 * relative to cmd_addr.
7336 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7339 void ata_std_ports(struct ata_ioports
*ioaddr
)
7341 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7342 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7343 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7344 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7345 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7346 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7347 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7348 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7349 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7350 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7357 * ata_pci_remove_one - PCI layer callback for device removal
7358 * @pdev: PCI device that was removed
7360 * PCI layer indicates to libata via this hook that hot-unplug or
7361 * module unload event has occurred. Detach all ports. Resource
7362 * release is handled via devres.
7365 * Inherited from PCI layer (may sleep).
7367 void ata_pci_remove_one(struct pci_dev
*pdev
)
7369 struct device
*dev
= &pdev
->dev
;
7370 struct ata_host
*host
= dev_get_drvdata(dev
);
7372 ata_host_detach(host
);
7375 /* move to PCI subsystem */
7376 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7378 unsigned long tmp
= 0;
7380 switch (bits
->width
) {
7383 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7389 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7395 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7406 return (tmp
== bits
->val
) ? 1 : 0;
7410 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7412 pci_save_state(pdev
);
7413 pci_disable_device(pdev
);
7415 if (mesg
.event
== PM_EVENT_SUSPEND
)
7416 pci_set_power_state(pdev
, PCI_D3hot
);
7419 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7423 pci_set_power_state(pdev
, PCI_D0
);
7424 pci_restore_state(pdev
);
7426 rc
= pcim_enable_device(pdev
);
7428 dev_printk(KERN_ERR
, &pdev
->dev
,
7429 "failed to enable device after resume (%d)\n", rc
);
7433 pci_set_master(pdev
);
7437 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7439 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7442 rc
= ata_host_suspend(host
, mesg
);
7446 ata_pci_device_do_suspend(pdev
, mesg
);
7451 int ata_pci_device_resume(struct pci_dev
*pdev
)
7453 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7456 rc
= ata_pci_device_do_resume(pdev
);
7458 ata_host_resume(host
);
7461 #endif /* CONFIG_PM */
7463 #endif /* CONFIG_PCI */
7466 static int __init
ata_init(void)
7468 ata_probe_timeout
*= HZ
;
7469 ata_wq
= create_workqueue("ata");
7473 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7475 destroy_workqueue(ata_wq
);
7479 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7483 static void __exit
ata_exit(void)
7485 destroy_workqueue(ata_wq
);
7486 destroy_workqueue(ata_aux_wq
);
7489 subsys_initcall(ata_init
);
7490 module_exit(ata_exit
);
7492 static unsigned long ratelimit_time
;
7493 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7495 int ata_ratelimit(void)
7498 unsigned long flags
;
7500 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7502 if (time_after(jiffies
, ratelimit_time
)) {
7504 ratelimit_time
= jiffies
+ (HZ
/5);
7508 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7514 * ata_wait_register - wait until register value changes
7515 * @reg: IO-mapped register
7516 * @mask: Mask to apply to read register value
7517 * @val: Wait condition
7518 * @interval_msec: polling interval in milliseconds
7519 * @timeout_msec: timeout in milliseconds
7521 * Waiting for some bits of register to change is a common
7522 * operation for ATA controllers. This function reads 32bit LE
7523 * IO-mapped register @reg and tests for the following condition.
7525 * (*@reg & mask) != val
7527 * If the condition is met, it returns; otherwise, the process is
7528 * repeated after @interval_msec until timeout.
7531 * Kernel thread context (may sleep)
7534 * The final register value.
7536 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7537 unsigned long interval_msec
,
7538 unsigned long timeout_msec
)
7540 unsigned long timeout
;
7543 tmp
= ioread32(reg
);
7545 /* Calculate timeout _after_ the first read to make sure
7546 * preceding writes reach the controller before starting to
7547 * eat away the timeout.
7549 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7551 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7552 msleep(interval_msec
);
7553 tmp
= ioread32(reg
);
7562 static void ata_dummy_noret(struct ata_port
*ap
) { }
7563 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7564 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7566 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7571 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7573 return AC_ERR_SYSTEM
;
7576 const struct ata_port_operations ata_dummy_port_ops
= {
7577 .check_status
= ata_dummy_check_status
,
7578 .check_altstatus
= ata_dummy_check_status
,
7579 .dev_select
= ata_noop_dev_select
,
7580 .qc_prep
= ata_noop_qc_prep
,
7581 .qc_issue
= ata_dummy_qc_issue
,
7582 .freeze
= ata_dummy_noret
,
7583 .thaw
= ata_dummy_noret
,
7584 .error_handler
= ata_dummy_noret
,
7585 .post_internal_cmd
= ata_dummy_qc_noret
,
7586 .irq_clear
= ata_dummy_noret
,
7587 .port_start
= ata_dummy_ret0
,
7588 .port_stop
= ata_dummy_noret
,
7591 const struct ata_port_info ata_dummy_port_info
= {
7592 .port_ops
= &ata_dummy_port_ops
,
7596 * libata is essentially a library of internal helper functions for
7597 * low-level ATA host controller drivers. As such, the API/ABI is
7598 * likely to change as new drivers are added and updated.
7599 * Do not depend on ABI/API stability.
7601 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7602 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7603 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7604 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7605 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7606 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7607 EXPORT_SYMBOL_GPL(ata_std_ports
);
7608 EXPORT_SYMBOL_GPL(ata_host_init
);
7609 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7610 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7611 EXPORT_SYMBOL_GPL(ata_host_start
);
7612 EXPORT_SYMBOL_GPL(ata_host_register
);
7613 EXPORT_SYMBOL_GPL(ata_host_activate
);
7614 EXPORT_SYMBOL_GPL(ata_host_detach
);
7615 EXPORT_SYMBOL_GPL(ata_sg_init
);
7616 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
7617 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7618 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7619 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7620 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7621 EXPORT_SYMBOL_GPL(ata_tf_load
);
7622 EXPORT_SYMBOL_GPL(ata_tf_read
);
7623 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7624 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7625 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7626 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7627 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7628 EXPORT_SYMBOL_GPL(ata_check_status
);
7629 EXPORT_SYMBOL_GPL(ata_altstatus
);
7630 EXPORT_SYMBOL_GPL(ata_exec_command
);
7631 EXPORT_SYMBOL_GPL(ata_port_start
);
7632 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7633 EXPORT_SYMBOL_GPL(ata_interrupt
);
7634 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7635 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7636 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7637 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7638 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7639 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7640 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7641 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7642 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7643 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7644 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7645 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7646 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7647 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7648 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7649 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7650 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7651 EXPORT_SYMBOL_GPL(ata_port_probe
);
7652 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7653 EXPORT_SYMBOL_GPL(sata_set_spd
);
7654 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7655 EXPORT_SYMBOL_GPL(sata_link_resume
);
7656 EXPORT_SYMBOL_GPL(sata_phy_reset
);
7657 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
7658 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7659 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7660 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7661 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7662 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7663 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7664 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7665 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7666 EXPORT_SYMBOL_GPL(ata_port_disable
);
7667 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7668 EXPORT_SYMBOL_GPL(ata_wait_register
);
7669 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7670 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7671 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7672 EXPORT_SYMBOL_GPL(ata_port_queue_task
);
7673 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7674 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7675 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7676 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7677 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7678 EXPORT_SYMBOL_GPL(ata_host_intr
);
7679 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7680 EXPORT_SYMBOL_GPL(sata_scr_read
);
7681 EXPORT_SYMBOL_GPL(sata_scr_write
);
7682 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7683 EXPORT_SYMBOL_GPL(ata_link_online
);
7684 EXPORT_SYMBOL_GPL(ata_link_offline
);
7686 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7687 EXPORT_SYMBOL_GPL(ata_host_resume
);
7688 #endif /* CONFIG_PM */
7689 EXPORT_SYMBOL_GPL(ata_id_string
);
7690 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7691 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode
);
7692 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7694 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7695 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7696 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7699 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7700 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7701 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7702 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7703 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7704 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7706 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7707 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7708 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7709 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7710 #endif /* CONFIG_PM */
7711 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7712 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7713 #endif /* CONFIG_PCI */
7715 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7716 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7717 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7718 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7719 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7721 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7722 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7723 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7724 EXPORT_SYMBOL_GPL(ata_port_desc
);
7726 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7727 #endif /* CONFIG_PCI */
7728 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
7729 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7730 EXPORT_SYMBOL_GPL(ata_link_abort
);
7731 EXPORT_SYMBOL_GPL(ata_port_abort
);
7732 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7733 EXPORT_SYMBOL_GPL(sata_async_notification
);
7734 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7735 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7736 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7737 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7738 EXPORT_SYMBOL_GPL(ata_do_eh
);
7739 EXPORT_SYMBOL_GPL(ata_irq_on
);
7740 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7742 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7743 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7744 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7745 EXPORT_SYMBOL_GPL(ata_cable_sata
);