2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/highmem.h>
50 #include <linux/spinlock.h>
51 #include <linux/blkdev.h>
52 #include <linux/delay.h>
53 #include <linux/timer.h>
54 #include <linux/interrupt.h>
55 #include <linux/completion.h>
56 #include <linux/suspend.h>
57 #include <linux/workqueue.h>
58 #include <linux/jiffies.h>
59 #include <linux/scatterlist.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_host.h>
64 #include <linux/libata.h>
65 #include <asm/semaphore.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
72 /* debounce timing parameters in msecs { interval, duration, timeout } */
73 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
74 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
75 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
77 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
78 u16 heads
, u16 sectors
);
79 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
80 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
81 u8 enable
, u8 feature
);
82 static void ata_dev_xfermask(struct ata_device
*dev
);
83 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
85 unsigned int ata_print_id
= 1;
86 static struct workqueue_struct
*ata_wq
;
88 struct workqueue_struct
*ata_aux_wq
;
90 struct ata_force_param
{
94 unsigned long xfer_mask
;
95 unsigned int horkage_on
;
96 unsigned int horkage_off
;
99 struct ata_force_ent
{
102 struct ata_force_param param
;
105 static struct ata_force_ent
*ata_force_tbl
;
106 static int ata_force_tbl_size
;
108 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
109 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0444);
110 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
112 int atapi_enabled
= 1;
113 module_param(atapi_enabled
, int, 0444);
114 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
116 int atapi_dmadir
= 0;
117 module_param(atapi_dmadir
, int, 0444);
118 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
120 int atapi_passthru16
= 1;
121 module_param(atapi_passthru16
, int, 0444);
122 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
125 module_param_named(fua
, libata_fua
, int, 0444);
126 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
128 static int ata_ignore_hpa
;
129 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
130 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
132 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
133 module_param_named(dma
, libata_dma_mask
, int, 0444);
134 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
136 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
137 module_param(ata_probe_timeout
, int, 0444);
138 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
140 int libata_noacpi
= 0;
141 module_param_named(noacpi
, libata_noacpi
, int, 0444);
142 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
144 int libata_allow_tpm
= 0;
145 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
146 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
148 MODULE_AUTHOR("Jeff Garzik");
149 MODULE_DESCRIPTION("Library module for ATA devices");
150 MODULE_LICENSE("GPL");
151 MODULE_VERSION(DRV_VERSION
);
155 * ata_force_cbl - force cable type according to libata.force
156 * @link: ATA link of interest
158 * Force cable type according to libata.force and whine about it.
159 * The last entry which has matching port number is used, so it
160 * can be specified as part of device force parameters. For
161 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
167 void ata_force_cbl(struct ata_port
*ap
)
171 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
172 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
174 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
177 if (fe
->param
.cbl
== ATA_CBL_NONE
)
180 ap
->cbl
= fe
->param
.cbl
;
181 ata_port_printk(ap
, KERN_NOTICE
,
182 "FORCE: cable set to %s\n", fe
->param
.name
);
188 * ata_force_spd_limit - force SATA spd limit according to libata.force
189 * @link: ATA link of interest
191 * Force SATA spd limit according to libata.force and whine about
192 * it. When only the port part is specified (e.g. 1:), the limit
193 * applies to all links connected to both the host link and all
194 * fan-out ports connected via PMP. If the device part is
195 * specified as 0 (e.g. 1.00:), it specifies the first fan-out
196 * link not the host link. Device number 15 always points to the
197 * host link whether PMP is attached or not.
202 static void ata_force_spd_limit(struct ata_link
*link
)
206 if (ata_is_host_link(link
))
211 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
212 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
214 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
217 if (fe
->device
!= -1 && fe
->device
!= linkno
)
220 if (!fe
->param
.spd_limit
)
223 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
224 ata_link_printk(link
, KERN_NOTICE
,
225 "FORCE: PHY spd limit set to %s\n", fe
->param
.name
);
231 * ata_force_xfermask - force xfermask according to libata.force
232 * @dev: ATA device of interest
234 * Force xfer_mask according to libata.force and whine about it.
235 * For consistency with link selection, device number 15 selects
236 * the first device connected to the host link.
241 static void ata_force_xfermask(struct ata_device
*dev
)
243 int devno
= dev
->link
->pmp
+ dev
->devno
;
244 int alt_devno
= devno
;
247 /* allow n.15 for the first device attached to host port */
248 if (ata_is_host_link(dev
->link
) && devno
== 0)
251 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
252 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
253 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
255 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
258 if (fe
->device
!= -1 && fe
->device
!= devno
&&
259 fe
->device
!= alt_devno
)
262 if (!fe
->param
.xfer_mask
)
265 ata_unpack_xfermask(fe
->param
.xfer_mask
,
266 &pio_mask
, &mwdma_mask
, &udma_mask
);
268 dev
->udma_mask
= udma_mask
;
269 else if (mwdma_mask
) {
271 dev
->mwdma_mask
= mwdma_mask
;
275 dev
->pio_mask
= pio_mask
;
278 ata_dev_printk(dev
, KERN_NOTICE
,
279 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
285 * ata_force_horkage - force horkage according to libata.force
286 * @dev: ATA device of interest
288 * Force horkage according to libata.force and whine about it.
289 * For consistency with link selection, device number 15 selects
290 * the first device connected to the host link.
295 static void ata_force_horkage(struct ata_device
*dev
)
297 int devno
= dev
->link
->pmp
+ dev
->devno
;
298 int alt_devno
= devno
;
301 /* allow n.15 for the first device attached to host port */
302 if (ata_is_host_link(dev
->link
) && devno
== 0)
305 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
306 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
308 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
311 if (fe
->device
!= -1 && fe
->device
!= devno
&&
312 fe
->device
!= alt_devno
)
315 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
316 !(dev
->horkage
& fe
->param
.horkage_off
))
319 dev
->horkage
|= fe
->param
.horkage_on
;
320 dev
->horkage
&= ~fe
->param
.horkage_off
;
322 ata_dev_printk(dev
, KERN_NOTICE
,
323 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
328 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
329 * @tf: Taskfile to convert
330 * @pmp: Port multiplier port
331 * @is_cmd: This FIS is for command
332 * @fis: Buffer into which data will output
334 * Converts a standard ATA taskfile to a Serial ATA
335 * FIS structure (Register - Host to Device).
338 * Inherited from caller.
340 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
342 fis
[0] = 0x27; /* Register - Host to Device FIS */
343 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
345 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
347 fis
[2] = tf
->command
;
348 fis
[3] = tf
->feature
;
355 fis
[8] = tf
->hob_lbal
;
356 fis
[9] = tf
->hob_lbam
;
357 fis
[10] = tf
->hob_lbah
;
358 fis
[11] = tf
->hob_feature
;
361 fis
[13] = tf
->hob_nsect
;
372 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
373 * @fis: Buffer from which data will be input
374 * @tf: Taskfile to output
376 * Converts a serial ATA FIS structure to a standard ATA taskfile.
379 * Inherited from caller.
382 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
384 tf
->command
= fis
[2]; /* status */
385 tf
->feature
= fis
[3]; /* error */
392 tf
->hob_lbal
= fis
[8];
393 tf
->hob_lbam
= fis
[9];
394 tf
->hob_lbah
= fis
[10];
397 tf
->hob_nsect
= fis
[13];
400 static const u8 ata_rw_cmds
[] = {
404 ATA_CMD_READ_MULTI_EXT
,
405 ATA_CMD_WRITE_MULTI_EXT
,
409 ATA_CMD_WRITE_MULTI_FUA_EXT
,
413 ATA_CMD_PIO_READ_EXT
,
414 ATA_CMD_PIO_WRITE_EXT
,
427 ATA_CMD_WRITE_FUA_EXT
431 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
432 * @tf: command to examine and configure
433 * @dev: device tf belongs to
435 * Examine the device configuration and tf->flags to calculate
436 * the proper read/write commands and protocol to use.
441 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
445 int index
, fua
, lba48
, write
;
447 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
448 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
449 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
451 if (dev
->flags
& ATA_DFLAG_PIO
) {
452 tf
->protocol
= ATA_PROT_PIO
;
453 index
= dev
->multi_count
? 0 : 8;
454 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
455 /* Unable to use DMA due to host limitation */
456 tf
->protocol
= ATA_PROT_PIO
;
457 index
= dev
->multi_count
? 0 : 8;
459 tf
->protocol
= ATA_PROT_DMA
;
463 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
472 * ata_tf_read_block - Read block address from ATA taskfile
473 * @tf: ATA taskfile of interest
474 * @dev: ATA device @tf belongs to
479 * Read block address from @tf. This function can handle all
480 * three address formats - LBA, LBA48 and CHS. tf->protocol and
481 * flags select the address format to use.
484 * Block address read from @tf.
486 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
490 if (tf
->flags
& ATA_TFLAG_LBA
) {
491 if (tf
->flags
& ATA_TFLAG_LBA48
) {
492 block
|= (u64
)tf
->hob_lbah
<< 40;
493 block
|= (u64
)tf
->hob_lbam
<< 32;
494 block
|= tf
->hob_lbal
<< 24;
496 block
|= (tf
->device
& 0xf) << 24;
498 block
|= tf
->lbah
<< 16;
499 block
|= tf
->lbam
<< 8;
504 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
505 head
= tf
->device
& 0xf;
508 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
515 * ata_build_rw_tf - Build ATA taskfile for given read/write request
516 * @tf: Target ATA taskfile
517 * @dev: ATA device @tf belongs to
518 * @block: Block address
519 * @n_block: Number of blocks
520 * @tf_flags: RW/FUA etc...
526 * Build ATA taskfile @tf for read/write request described by
527 * @block, @n_block, @tf_flags and @tag on @dev.
531 * 0 on success, -ERANGE if the request is too large for @dev,
532 * -EINVAL if the request is invalid.
534 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
535 u64 block
, u32 n_block
, unsigned int tf_flags
,
538 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
539 tf
->flags
|= tf_flags
;
541 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
543 if (!lba_48_ok(block
, n_block
))
546 tf
->protocol
= ATA_PROT_NCQ
;
547 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
549 if (tf
->flags
& ATA_TFLAG_WRITE
)
550 tf
->command
= ATA_CMD_FPDMA_WRITE
;
552 tf
->command
= ATA_CMD_FPDMA_READ
;
554 tf
->nsect
= tag
<< 3;
555 tf
->hob_feature
= (n_block
>> 8) & 0xff;
556 tf
->feature
= n_block
& 0xff;
558 tf
->hob_lbah
= (block
>> 40) & 0xff;
559 tf
->hob_lbam
= (block
>> 32) & 0xff;
560 tf
->hob_lbal
= (block
>> 24) & 0xff;
561 tf
->lbah
= (block
>> 16) & 0xff;
562 tf
->lbam
= (block
>> 8) & 0xff;
563 tf
->lbal
= block
& 0xff;
566 if (tf
->flags
& ATA_TFLAG_FUA
)
567 tf
->device
|= 1 << 7;
568 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
569 tf
->flags
|= ATA_TFLAG_LBA
;
571 if (lba_28_ok(block
, n_block
)) {
573 tf
->device
|= (block
>> 24) & 0xf;
574 } else if (lba_48_ok(block
, n_block
)) {
575 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
579 tf
->flags
|= ATA_TFLAG_LBA48
;
581 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
583 tf
->hob_lbah
= (block
>> 40) & 0xff;
584 tf
->hob_lbam
= (block
>> 32) & 0xff;
585 tf
->hob_lbal
= (block
>> 24) & 0xff;
587 /* request too large even for LBA48 */
590 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
593 tf
->nsect
= n_block
& 0xff;
595 tf
->lbah
= (block
>> 16) & 0xff;
596 tf
->lbam
= (block
>> 8) & 0xff;
597 tf
->lbal
= block
& 0xff;
599 tf
->device
|= ATA_LBA
;
602 u32 sect
, head
, cyl
, track
;
604 /* The request -may- be too large for CHS addressing. */
605 if (!lba_28_ok(block
, n_block
))
608 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
611 /* Convert LBA to CHS */
612 track
= (u32
)block
/ dev
->sectors
;
613 cyl
= track
/ dev
->heads
;
614 head
= track
% dev
->heads
;
615 sect
= (u32
)block
% dev
->sectors
+ 1;
617 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
618 (u32
)block
, track
, cyl
, head
, sect
);
620 /* Check whether the converted CHS can fit.
624 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
627 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
638 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
639 * @pio_mask: pio_mask
640 * @mwdma_mask: mwdma_mask
641 * @udma_mask: udma_mask
643 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
644 * unsigned int xfer_mask.
652 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
653 unsigned long mwdma_mask
,
654 unsigned long udma_mask
)
656 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
657 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
658 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
662 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
663 * @xfer_mask: xfer_mask to unpack
664 * @pio_mask: resulting pio_mask
665 * @mwdma_mask: resulting mwdma_mask
666 * @udma_mask: resulting udma_mask
668 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
669 * Any NULL distination masks will be ignored.
671 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
672 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
675 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
677 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
679 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
682 static const struct ata_xfer_ent
{
686 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
687 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
688 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
693 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
694 * @xfer_mask: xfer_mask of interest
696 * Return matching XFER_* value for @xfer_mask. Only the highest
697 * bit of @xfer_mask is considered.
703 * Matching XFER_* value, 0xff if no match found.
705 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
707 int highbit
= fls(xfer_mask
) - 1;
708 const struct ata_xfer_ent
*ent
;
710 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
711 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
712 return ent
->base
+ highbit
- ent
->shift
;
717 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
718 * @xfer_mode: XFER_* of interest
720 * Return matching xfer_mask for @xfer_mode.
726 * Matching xfer_mask, 0 if no match found.
728 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
730 const struct ata_xfer_ent
*ent
;
732 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
733 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
734 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
735 & ~((1 << ent
->shift
) - 1);
740 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
741 * @xfer_mode: XFER_* of interest
743 * Return matching xfer_shift for @xfer_mode.
749 * Matching xfer_shift, -1 if no match found.
751 int ata_xfer_mode2shift(unsigned long xfer_mode
)
753 const struct ata_xfer_ent
*ent
;
755 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
756 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
762 * ata_mode_string - convert xfer_mask to string
763 * @xfer_mask: mask of bits supported; only highest bit counts.
765 * Determine string which represents the highest speed
766 * (highest bit in @modemask).
772 * Constant C string representing highest speed listed in
773 * @mode_mask, or the constant C string "<n/a>".
775 const char *ata_mode_string(unsigned long xfer_mask
)
777 static const char * const xfer_mode_str
[] = {
801 highbit
= fls(xfer_mask
) - 1;
802 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
803 return xfer_mode_str
[highbit
];
807 static const char *sata_spd_string(unsigned int spd
)
809 static const char * const spd_str
[] = {
814 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
816 return spd_str
[spd
- 1];
819 void ata_dev_disable(struct ata_device
*dev
)
821 if (ata_dev_enabled(dev
)) {
822 if (ata_msg_drv(dev
->link
->ap
))
823 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
824 ata_acpi_on_disable(dev
);
825 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
831 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
833 struct ata_link
*link
= dev
->link
;
834 struct ata_port
*ap
= link
->ap
;
836 unsigned int err_mask
;
840 * disallow DIPM for drivers which haven't set
841 * ATA_FLAG_IPM. This is because when DIPM is enabled,
842 * phy ready will be set in the interrupt status on
843 * state changes, which will cause some drivers to
844 * think there are errors - additionally drivers will
845 * need to disable hot plug.
847 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
848 ap
->pm_policy
= NOT_AVAILABLE
;
853 * For DIPM, we will only enable it for the
856 * Why? Because Disks are too stupid to know that
857 * If the host rejects a request to go to SLUMBER
858 * they should retry at PARTIAL, and instead it
859 * just would give up. So, for medium_power to
860 * work at all, we need to only allow HIPM.
862 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
868 /* no restrictions on IPM transitions */
869 scontrol
&= ~(0x3 << 8);
870 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
875 if (dev
->flags
& ATA_DFLAG_DIPM
)
876 err_mask
= ata_dev_set_feature(dev
,
877 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
880 /* allow IPM to PARTIAL */
881 scontrol
&= ~(0x1 << 8);
882 scontrol
|= (0x2 << 8);
883 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
888 * we don't have to disable DIPM since IPM flags
889 * disallow transitions to SLUMBER, which effectively
890 * disable DIPM if it does not support PARTIAL
894 case MAX_PERFORMANCE
:
895 /* disable all IPM transitions */
896 scontrol
|= (0x3 << 8);
897 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
902 * we don't have to disable DIPM since IPM flags
903 * disallow all transitions which effectively
904 * disable DIPM anyway.
909 /* FIXME: handle SET FEATURES failure */
916 * ata_dev_enable_pm - enable SATA interface power management
917 * @dev: device to enable power management
918 * @policy: the link power management policy
920 * Enable SATA Interface power management. This will enable
921 * Device Interface Power Management (DIPM) for min_power
922 * policy, and then call driver specific callbacks for
923 * enabling Host Initiated Power management.
926 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
928 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
931 struct ata_port
*ap
= dev
->link
->ap
;
933 /* set HIPM first, then DIPM */
934 if (ap
->ops
->enable_pm
)
935 rc
= ap
->ops
->enable_pm(ap
, policy
);
938 rc
= ata_dev_set_dipm(dev
, policy
);
942 ap
->pm_policy
= MAX_PERFORMANCE
;
944 ap
->pm_policy
= policy
;
945 return /* rc */; /* hopefully we can use 'rc' eventually */
950 * ata_dev_disable_pm - disable SATA interface power management
951 * @dev: device to disable power management
953 * Disable SATA Interface power management. This will disable
954 * Device Interface Power Management (DIPM) without changing
955 * policy, call driver specific callbacks for disabling Host
956 * Initiated Power management.
961 static void ata_dev_disable_pm(struct ata_device
*dev
)
963 struct ata_port
*ap
= dev
->link
->ap
;
965 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
966 if (ap
->ops
->disable_pm
)
967 ap
->ops
->disable_pm(ap
);
969 #endif /* CONFIG_PM */
971 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
973 ap
->pm_policy
= policy
;
974 ap
->link
.eh_info
.action
|= ATA_EHI_LPM
;
975 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
976 ata_port_schedule_eh(ap
);
980 static void ata_lpm_enable(struct ata_host
*host
)
982 struct ata_link
*link
;
984 struct ata_device
*dev
;
987 for (i
= 0; i
< host
->n_ports
; i
++) {
989 ata_port_for_each_link(link
, ap
) {
990 ata_link_for_each_dev(dev
, link
)
991 ata_dev_disable_pm(dev
);
996 static void ata_lpm_disable(struct ata_host
*host
)
1000 for (i
= 0; i
< host
->n_ports
; i
++) {
1001 struct ata_port
*ap
= host
->ports
[i
];
1002 ata_lpm_schedule(ap
, ap
->pm_policy
);
1005 #endif /* CONFIG_PM */
1009 * ata_devchk - PATA device presence detection
1010 * @ap: ATA channel to examine
1011 * @device: Device to examine (starting at zero)
1013 * This technique was originally described in
1014 * Hale Landis's ATADRVR (www.ata-atapi.com), and
1015 * later found its way into the ATA/ATAPI spec.
1017 * Write a pattern to the ATA shadow registers,
1018 * and if a device is present, it will respond by
1019 * correctly storing and echoing back the
1020 * ATA shadow register contents.
1026 static unsigned int ata_devchk(struct ata_port
*ap
, unsigned int device
)
1028 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1031 ap
->ops
->dev_select(ap
, device
);
1033 iowrite8(0x55, ioaddr
->nsect_addr
);
1034 iowrite8(0xaa, ioaddr
->lbal_addr
);
1036 iowrite8(0xaa, ioaddr
->nsect_addr
);
1037 iowrite8(0x55, ioaddr
->lbal_addr
);
1039 iowrite8(0x55, ioaddr
->nsect_addr
);
1040 iowrite8(0xaa, ioaddr
->lbal_addr
);
1042 nsect
= ioread8(ioaddr
->nsect_addr
);
1043 lbal
= ioread8(ioaddr
->lbal_addr
);
1045 if ((nsect
== 0x55) && (lbal
== 0xaa))
1046 return 1; /* we found a device */
1048 return 0; /* nothing found */
1052 * ata_dev_classify - determine device type based on ATA-spec signature
1053 * @tf: ATA taskfile register set for device to be identified
1055 * Determine from taskfile register contents whether a device is
1056 * ATA or ATAPI, as per "Signature and persistence" section
1057 * of ATA/PI spec (volume 1, sect 5.14).
1063 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1064 * %ATA_DEV_UNKNOWN the event of failure.
1066 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1068 /* Apple's open source Darwin code hints that some devices only
1069 * put a proper signature into the LBA mid/high registers,
1070 * So, we only check those. It's sufficient for uniqueness.
1072 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1073 * signatures for ATA and ATAPI devices attached on SerialATA,
1074 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1075 * spec has never mentioned about using different signatures
1076 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1077 * Multiplier specification began to use 0x69/0x96 to identify
1078 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1079 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1080 * 0x69/0x96 shortly and described them as reserved for
1083 * We follow the current spec and consider that 0x69/0x96
1084 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1086 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1087 DPRINTK("found ATA device by sig\n");
1091 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1092 DPRINTK("found ATAPI device by sig\n");
1093 return ATA_DEV_ATAPI
;
1096 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1097 DPRINTK("found PMP device by sig\n");
1101 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1102 printk(KERN_INFO
"ata: SEMB device ignored\n");
1103 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1106 DPRINTK("unknown device\n");
1107 return ATA_DEV_UNKNOWN
;
1111 * ata_dev_try_classify - Parse returned ATA device signature
1112 * @dev: ATA device to classify (starting at zero)
1113 * @present: device seems present
1114 * @r_err: Value of error register on completion
1116 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
1117 * an ATA/ATAPI-defined set of values is placed in the ATA
1118 * shadow registers, indicating the results of device detection
1121 * Select the ATA device, and read the values from the ATA shadow
1122 * registers. Then parse according to the Error register value,
1123 * and the spec-defined values examined by ata_dev_classify().
1129 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
1131 unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
1134 struct ata_port
*ap
= dev
->link
->ap
;
1135 struct ata_taskfile tf
;
1139 ap
->ops
->dev_select(ap
, dev
->devno
);
1141 memset(&tf
, 0, sizeof(tf
));
1143 ap
->ops
->tf_read(ap
, &tf
);
1148 /* see if device passed diags: continue and warn later */
1150 /* diagnostic fail : do nothing _YET_ */
1151 dev
->horkage
|= ATA_HORKAGE_DIAGNOSTIC
;
1154 else if ((dev
->devno
== 0) && (err
== 0x81))
1157 return ATA_DEV_NONE
;
1159 /* determine if device is ATA or ATAPI */
1160 class = ata_dev_classify(&tf
);
1162 if (class == ATA_DEV_UNKNOWN
) {
1163 /* If the device failed diagnostic, it's likely to
1164 * have reported incorrect device signature too.
1165 * Assume ATA device if the device seems present but
1166 * device signature is invalid with diagnostic
1169 if (present
&& (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
))
1170 class = ATA_DEV_ATA
;
1172 class = ATA_DEV_NONE
;
1173 } else if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
1174 class = ATA_DEV_NONE
;
1180 * ata_id_string - Convert IDENTIFY DEVICE page into string
1181 * @id: IDENTIFY DEVICE results we will examine
1182 * @s: string into which data is output
1183 * @ofs: offset into identify device page
1184 * @len: length of string to return. must be an even number.
1186 * The strings in the IDENTIFY DEVICE page are broken up into
1187 * 16-bit chunks. Run through the string, and output each
1188 * 8-bit chunk linearly, regardless of platform.
1194 void ata_id_string(const u16
*id
, unsigned char *s
,
1195 unsigned int ofs
, unsigned int len
)
1214 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1215 * @id: IDENTIFY DEVICE results we will examine
1216 * @s: string into which data is output
1217 * @ofs: offset into identify device page
1218 * @len: length of string to return. must be an odd number.
1220 * This function is identical to ata_id_string except that it
1221 * trims trailing spaces and terminates the resulting string with
1222 * null. @len must be actual maximum length (even number) + 1.
1227 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1228 unsigned int ofs
, unsigned int len
)
1232 WARN_ON(!(len
& 1));
1234 ata_id_string(id
, s
, ofs
, len
- 1);
1236 p
= s
+ strnlen(s
, len
- 1);
1237 while (p
> s
&& p
[-1] == ' ')
1242 static u64
ata_id_n_sectors(const u16
*id
)
1244 if (ata_id_has_lba(id
)) {
1245 if (ata_id_has_lba48(id
))
1246 return ata_id_u64(id
, 100);
1248 return ata_id_u32(id
, 60);
1250 if (ata_id_current_chs_valid(id
))
1251 return ata_id_u32(id
, 57);
1253 return id
[1] * id
[3] * id
[6];
1257 static u64
ata_tf_to_lba48(struct ata_taskfile
*tf
)
1261 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1262 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1263 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1264 sectors
|= (tf
->lbah
& 0xff) << 16;
1265 sectors
|= (tf
->lbam
& 0xff) << 8;
1266 sectors
|= (tf
->lbal
& 0xff);
1271 static u64
ata_tf_to_lba(struct ata_taskfile
*tf
)
1275 sectors
|= (tf
->device
& 0x0f) << 24;
1276 sectors
|= (tf
->lbah
& 0xff) << 16;
1277 sectors
|= (tf
->lbam
& 0xff) << 8;
1278 sectors
|= (tf
->lbal
& 0xff);
1284 * ata_read_native_max_address - Read native max address
1285 * @dev: target device
1286 * @max_sectors: out parameter for the result native max address
1288 * Perform an LBA48 or LBA28 native size query upon the device in
1292 * 0 on success, -EACCES if command is aborted by the drive.
1293 * -EIO on other errors.
1295 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1297 unsigned int err_mask
;
1298 struct ata_taskfile tf
;
1299 int lba48
= ata_id_has_lba48(dev
->id
);
1301 ata_tf_init(dev
, &tf
);
1303 /* always clear all address registers */
1304 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1307 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1308 tf
.flags
|= ATA_TFLAG_LBA48
;
1310 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1312 tf
.protocol
|= ATA_PROT_NODATA
;
1313 tf
.device
|= ATA_LBA
;
1315 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1317 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1318 "max address (err_mask=0x%x)\n", err_mask
);
1319 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1325 *max_sectors
= ata_tf_to_lba48(&tf
);
1327 *max_sectors
= ata_tf_to_lba(&tf
);
1328 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1334 * ata_set_max_sectors - Set max sectors
1335 * @dev: target device
1336 * @new_sectors: new max sectors value to set for the device
1338 * Set max sectors of @dev to @new_sectors.
1341 * 0 on success, -EACCES if command is aborted or denied (due to
1342 * previous non-volatile SET_MAX) by the drive. -EIO on other
1345 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1347 unsigned int err_mask
;
1348 struct ata_taskfile tf
;
1349 int lba48
= ata_id_has_lba48(dev
->id
);
1353 ata_tf_init(dev
, &tf
);
1355 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1358 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1359 tf
.flags
|= ATA_TFLAG_LBA48
;
1361 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1362 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1363 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1365 tf
.command
= ATA_CMD_SET_MAX
;
1367 tf
.device
|= (new_sectors
>> 24) & 0xf;
1370 tf
.protocol
|= ATA_PROT_NODATA
;
1371 tf
.device
|= ATA_LBA
;
1373 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1374 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1375 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1377 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1379 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1380 "max address (err_mask=0x%x)\n", err_mask
);
1381 if (err_mask
== AC_ERR_DEV
&&
1382 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1391 * ata_hpa_resize - Resize a device with an HPA set
1392 * @dev: Device to resize
1394 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1395 * it if required to the full size of the media. The caller must check
1396 * the drive has the HPA feature set enabled.
1399 * 0 on success, -errno on failure.
1401 static int ata_hpa_resize(struct ata_device
*dev
)
1403 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1404 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1405 u64 sectors
= ata_id_n_sectors(dev
->id
);
1409 /* do we need to do it? */
1410 if (dev
->class != ATA_DEV_ATA
||
1411 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1412 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1415 /* read native max address */
1416 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1418 /* If HPA isn't going to be unlocked, skip HPA
1419 * resizing from the next try.
1421 if (!ata_ignore_hpa
) {
1422 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1423 "broken, will skip HPA handling\n");
1424 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1426 /* we can continue if device aborted the command */
1434 /* nothing to do? */
1435 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1436 if (!print_info
|| native_sectors
== sectors
)
1439 if (native_sectors
> sectors
)
1440 ata_dev_printk(dev
, KERN_INFO
,
1441 "HPA detected: current %llu, native %llu\n",
1442 (unsigned long long)sectors
,
1443 (unsigned long long)native_sectors
);
1444 else if (native_sectors
< sectors
)
1445 ata_dev_printk(dev
, KERN_WARNING
,
1446 "native sectors (%llu) is smaller than "
1448 (unsigned long long)native_sectors
,
1449 (unsigned long long)sectors
);
1453 /* let's unlock HPA */
1454 rc
= ata_set_max_sectors(dev
, native_sectors
);
1455 if (rc
== -EACCES
) {
1456 /* if device aborted the command, skip HPA resizing */
1457 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1458 "(%llu -> %llu), skipping HPA handling\n",
1459 (unsigned long long)sectors
,
1460 (unsigned long long)native_sectors
);
1461 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1466 /* re-read IDENTIFY data */
1467 rc
= ata_dev_reread_id(dev
, 0);
1469 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1470 "data after HPA resizing\n");
1475 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1476 ata_dev_printk(dev
, KERN_INFO
,
1477 "HPA unlocked: %llu -> %llu, native %llu\n",
1478 (unsigned long long)sectors
,
1479 (unsigned long long)new_sectors
,
1480 (unsigned long long)native_sectors
);
1487 * ata_noop_dev_select - Select device 0/1 on ATA bus
1488 * @ap: ATA channel to manipulate
1489 * @device: ATA device (numbered from zero) to select
1491 * This function performs no actual function.
1493 * May be used as the dev_select() entry in ata_port_operations.
1498 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1504 * ata_std_dev_select - Select device 0/1 on ATA bus
1505 * @ap: ATA channel to manipulate
1506 * @device: ATA device (numbered from zero) to select
1508 * Use the method defined in the ATA specification to
1509 * make either device 0, or device 1, active on the
1510 * ATA channel. Works with both PIO and MMIO.
1512 * May be used as the dev_select() entry in ata_port_operations.
1518 void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
)
1523 tmp
= ATA_DEVICE_OBS
;
1525 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1527 iowrite8(tmp
, ap
->ioaddr
.device_addr
);
1528 ata_pause(ap
); /* needed; also flushes, for mmio */
1532 * ata_dev_select - Select device 0/1 on ATA bus
1533 * @ap: ATA channel to manipulate
1534 * @device: ATA device (numbered from zero) to select
1535 * @wait: non-zero to wait for Status register BSY bit to clear
1536 * @can_sleep: non-zero if context allows sleeping
1538 * Use the method defined in the ATA specification to
1539 * make either device 0, or device 1, active on the
1542 * This is a high-level version of ata_std_dev_select(),
1543 * which additionally provides the services of inserting
1544 * the proper pauses and status polling, where needed.
1550 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1551 unsigned int wait
, unsigned int can_sleep
)
1553 if (ata_msg_probe(ap
))
1554 ata_port_printk(ap
, KERN_INFO
, "ata_dev_select: ENTER, "
1555 "device %u, wait %u\n", device
, wait
);
1560 ap
->ops
->dev_select(ap
, device
);
1563 if (can_sleep
&& ap
->link
.device
[device
].class == ATA_DEV_ATAPI
)
1570 * ata_dump_id - IDENTIFY DEVICE info debugging output
1571 * @id: IDENTIFY DEVICE page to dump
1573 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1580 static inline void ata_dump_id(const u16
*id
)
1582 DPRINTK("49==0x%04x "
1592 DPRINTK("80==0x%04x "
1602 DPRINTK("88==0x%04x "
1609 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1610 * @id: IDENTIFY data to compute xfer mask from
1612 * Compute the xfermask for this device. This is not as trivial
1613 * as it seems if we must consider early devices correctly.
1615 * FIXME: pre IDE drive timing (do we care ?).
1623 unsigned long ata_id_xfermask(const u16
*id
)
1625 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1627 /* Usual case. Word 53 indicates word 64 is valid */
1628 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1629 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1633 /* If word 64 isn't valid then Word 51 high byte holds
1634 * the PIO timing number for the maximum. Turn it into
1637 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1638 if (mode
< 5) /* Valid PIO range */
1639 pio_mask
= (2 << mode
) - 1;
1643 /* But wait.. there's more. Design your standards by
1644 * committee and you too can get a free iordy field to
1645 * process. However its the speeds not the modes that
1646 * are supported... Note drivers using the timing API
1647 * will get this right anyway
1651 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1653 if (ata_id_is_cfa(id
)) {
1655 * Process compact flash extended modes
1657 int pio
= id
[163] & 0x7;
1658 int dma
= (id
[163] >> 3) & 7;
1661 pio_mask
|= (1 << 5);
1663 pio_mask
|= (1 << 6);
1665 mwdma_mask
|= (1 << 3);
1667 mwdma_mask
|= (1 << 4);
1671 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1672 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1674 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1678 * ata_pio_queue_task - Queue port_task
1679 * @ap: The ata_port to queue port_task for
1680 * @fn: workqueue function to be scheduled
1681 * @data: data for @fn to use
1682 * @delay: delay time for workqueue function
1684 * Schedule @fn(@data) for execution after @delay jiffies using
1685 * port_task. There is one port_task per port and it's the
1686 * user(low level driver)'s responsibility to make sure that only
1687 * one task is active at any given time.
1689 * libata core layer takes care of synchronization between
1690 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1694 * Inherited from caller.
1696 static void ata_pio_queue_task(struct ata_port
*ap
, void *data
,
1697 unsigned long delay
)
1699 ap
->port_task_data
= data
;
1701 /* may fail if ata_port_flush_task() in progress */
1702 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1706 * ata_port_flush_task - Flush port_task
1707 * @ap: The ata_port to flush port_task for
1709 * After this function completes, port_task is guranteed not to
1710 * be running or scheduled.
1713 * Kernel thread context (may sleep)
1715 void ata_port_flush_task(struct ata_port
*ap
)
1719 cancel_rearming_delayed_work(&ap
->port_task
);
1721 if (ata_msg_ctl(ap
))
1722 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __FUNCTION__
);
1725 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1727 struct completion
*waiting
= qc
->private_data
;
1733 * ata_exec_internal_sg - execute libata internal command
1734 * @dev: Device to which the command is sent
1735 * @tf: Taskfile registers for the command and the result
1736 * @cdb: CDB for packet command
1737 * @dma_dir: Data tranfer direction of the command
1738 * @sgl: sg list for the data buffer of the command
1739 * @n_elem: Number of sg entries
1740 * @timeout: Timeout in msecs (0 for default)
1742 * Executes libata internal command with timeout. @tf contains
1743 * command on entry and result on return. Timeout and error
1744 * conditions are reported via return value. No recovery action
1745 * is taken after a command times out. It's caller's duty to
1746 * clean up after timeout.
1749 * None. Should be called with kernel context, might sleep.
1752 * Zero on success, AC_ERR_* mask on failure
1754 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1755 struct ata_taskfile
*tf
, const u8
*cdb
,
1756 int dma_dir
, struct scatterlist
*sgl
,
1757 unsigned int n_elem
, unsigned long timeout
)
1759 struct ata_link
*link
= dev
->link
;
1760 struct ata_port
*ap
= link
->ap
;
1761 u8 command
= tf
->command
;
1762 struct ata_queued_cmd
*qc
;
1763 unsigned int tag
, preempted_tag
;
1764 u32 preempted_sactive
, preempted_qc_active
;
1765 int preempted_nr_active_links
;
1766 DECLARE_COMPLETION_ONSTACK(wait
);
1767 unsigned long flags
;
1768 unsigned int err_mask
;
1771 spin_lock_irqsave(ap
->lock
, flags
);
1773 /* no internal command while frozen */
1774 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1775 spin_unlock_irqrestore(ap
->lock
, flags
);
1776 return AC_ERR_SYSTEM
;
1779 /* initialize internal qc */
1781 /* XXX: Tag 0 is used for drivers with legacy EH as some
1782 * drivers choke if any other tag is given. This breaks
1783 * ata_tag_internal() test for those drivers. Don't use new
1784 * EH stuff without converting to it.
1786 if (ap
->ops
->error_handler
)
1787 tag
= ATA_TAG_INTERNAL
;
1791 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1793 qc
= __ata_qc_from_tag(ap
, tag
);
1801 preempted_tag
= link
->active_tag
;
1802 preempted_sactive
= link
->sactive
;
1803 preempted_qc_active
= ap
->qc_active
;
1804 preempted_nr_active_links
= ap
->nr_active_links
;
1805 link
->active_tag
= ATA_TAG_POISON
;
1808 ap
->nr_active_links
= 0;
1810 /* prepare & issue qc */
1813 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1814 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1815 qc
->dma_dir
= dma_dir
;
1816 if (dma_dir
!= DMA_NONE
) {
1817 unsigned int i
, buflen
= 0;
1818 struct scatterlist
*sg
;
1820 for_each_sg(sgl
, sg
, n_elem
, i
)
1821 buflen
+= sg
->length
;
1823 ata_sg_init(qc
, sgl
, n_elem
);
1824 qc
->nbytes
= buflen
;
1827 qc
->private_data
= &wait
;
1828 qc
->complete_fn
= ata_qc_complete_internal
;
1832 spin_unlock_irqrestore(ap
->lock
, flags
);
1835 timeout
= ata_probe_timeout
* 1000 / HZ
;
1837 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1839 ata_port_flush_task(ap
);
1842 spin_lock_irqsave(ap
->lock
, flags
);
1844 /* We're racing with irq here. If we lose, the
1845 * following test prevents us from completing the qc
1846 * twice. If we win, the port is frozen and will be
1847 * cleaned up by ->post_internal_cmd().
1849 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1850 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1852 if (ap
->ops
->error_handler
)
1853 ata_port_freeze(ap
);
1855 ata_qc_complete(qc
);
1857 if (ata_msg_warn(ap
))
1858 ata_dev_printk(dev
, KERN_WARNING
,
1859 "qc timeout (cmd 0x%x)\n", command
);
1862 spin_unlock_irqrestore(ap
->lock
, flags
);
1865 /* do post_internal_cmd */
1866 if (ap
->ops
->post_internal_cmd
)
1867 ap
->ops
->post_internal_cmd(qc
);
1869 /* perform minimal error analysis */
1870 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1871 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1872 qc
->err_mask
|= AC_ERR_DEV
;
1875 qc
->err_mask
|= AC_ERR_OTHER
;
1877 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1878 qc
->err_mask
&= ~AC_ERR_OTHER
;
1882 spin_lock_irqsave(ap
->lock
, flags
);
1884 *tf
= qc
->result_tf
;
1885 err_mask
= qc
->err_mask
;
1888 link
->active_tag
= preempted_tag
;
1889 link
->sactive
= preempted_sactive
;
1890 ap
->qc_active
= preempted_qc_active
;
1891 ap
->nr_active_links
= preempted_nr_active_links
;
1893 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1894 * Until those drivers are fixed, we detect the condition
1895 * here, fail the command with AC_ERR_SYSTEM and reenable the
1898 * Note that this doesn't change any behavior as internal
1899 * command failure results in disabling the device in the
1900 * higher layer for LLDDs without new reset/EH callbacks.
1902 * Kill the following code as soon as those drivers are fixed.
1904 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1905 err_mask
|= AC_ERR_SYSTEM
;
1909 spin_unlock_irqrestore(ap
->lock
, flags
);
1915 * ata_exec_internal - execute libata internal command
1916 * @dev: Device to which the command is sent
1917 * @tf: Taskfile registers for the command and the result
1918 * @cdb: CDB for packet command
1919 * @dma_dir: Data tranfer direction of the command
1920 * @buf: Data buffer of the command
1921 * @buflen: Length of data buffer
1922 * @timeout: Timeout in msecs (0 for default)
1924 * Wrapper around ata_exec_internal_sg() which takes simple
1925 * buffer instead of sg list.
1928 * None. Should be called with kernel context, might sleep.
1931 * Zero on success, AC_ERR_* mask on failure
1933 unsigned ata_exec_internal(struct ata_device
*dev
,
1934 struct ata_taskfile
*tf
, const u8
*cdb
,
1935 int dma_dir
, void *buf
, unsigned int buflen
,
1936 unsigned long timeout
)
1938 struct scatterlist
*psg
= NULL
, sg
;
1939 unsigned int n_elem
= 0;
1941 if (dma_dir
!= DMA_NONE
) {
1943 sg_init_one(&sg
, buf
, buflen
);
1948 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1953 * ata_do_simple_cmd - execute simple internal command
1954 * @dev: Device to which the command is sent
1955 * @cmd: Opcode to execute
1957 * Execute a 'simple' command, that only consists of the opcode
1958 * 'cmd' itself, without filling any other registers
1961 * Kernel thread context (may sleep).
1964 * Zero on success, AC_ERR_* mask on failure
1966 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1968 struct ata_taskfile tf
;
1970 ata_tf_init(dev
, &tf
);
1973 tf
.flags
|= ATA_TFLAG_DEVICE
;
1974 tf
.protocol
= ATA_PROT_NODATA
;
1976 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1980 * ata_pio_need_iordy - check if iordy needed
1983 * Check if the current speed of the device requires IORDY. Used
1984 * by various controllers for chip configuration.
1987 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1989 /* Controller doesn't support IORDY. Probably a pointless check
1990 as the caller should know this */
1991 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1993 /* PIO3 and higher it is mandatory */
1994 if (adev
->pio_mode
> XFER_PIO_2
)
1996 /* We turn it on when possible */
1997 if (ata_id_has_iordy(adev
->id
))
2003 * ata_pio_mask_no_iordy - Return the non IORDY mask
2006 * Compute the highest mode possible if we are not using iordy. Return
2007 * -1 if no iordy mode is available.
2010 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
2012 /* If we have no drive specific rule, then PIO 2 is non IORDY */
2013 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
2014 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
2015 /* Is the speed faster than the drive allows non IORDY ? */
2017 /* This is cycle times not frequency - watch the logic! */
2018 if (pio
> 240) /* PIO2 is 240nS per cycle */
2019 return 3 << ATA_SHIFT_PIO
;
2020 return 7 << ATA_SHIFT_PIO
;
2023 return 3 << ATA_SHIFT_PIO
;
2027 * ata_dev_read_id - Read ID data from the specified device
2028 * @dev: target device
2029 * @p_class: pointer to class of the target device (may be changed)
2030 * @flags: ATA_READID_* flags
2031 * @id: buffer to read IDENTIFY data into
2033 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2034 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2035 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2036 * for pre-ATA4 drives.
2038 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2039 * now we abort if we hit that case.
2042 * Kernel thread context (may sleep)
2045 * 0 on success, -errno otherwise.
2047 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
2048 unsigned int flags
, u16
*id
)
2050 struct ata_port
*ap
= dev
->link
->ap
;
2051 unsigned int class = *p_class
;
2052 struct ata_taskfile tf
;
2053 unsigned int err_mask
= 0;
2055 int may_fallback
= 1, tried_spinup
= 0;
2058 if (ata_msg_ctl(ap
))
2059 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
2061 ata_dev_select(ap
, dev
->devno
, 1, 1); /* select device 0/1 */
2063 ata_tf_init(dev
, &tf
);
2067 tf
.command
= ATA_CMD_ID_ATA
;
2070 tf
.command
= ATA_CMD_ID_ATAPI
;
2074 reason
= "unsupported class";
2078 tf
.protocol
= ATA_PROT_PIO
;
2080 /* Some devices choke if TF registers contain garbage. Make
2081 * sure those are properly initialized.
2083 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2085 /* Device presence detection is unreliable on some
2086 * controllers. Always poll IDENTIFY if available.
2088 tf
.flags
|= ATA_TFLAG_POLLING
;
2090 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
2091 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
2093 if (err_mask
& AC_ERR_NODEV_HINT
) {
2094 DPRINTK("ata%u.%d: NODEV after polling detection\n",
2095 ap
->print_id
, dev
->devno
);
2099 /* Device or controller might have reported the wrong
2100 * device class. Give a shot at the other IDENTIFY if
2101 * the current one is aborted by the device.
2104 (err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
2107 if (class == ATA_DEV_ATA
)
2108 class = ATA_DEV_ATAPI
;
2110 class = ATA_DEV_ATA
;
2115 reason
= "I/O error";
2119 /* Falling back doesn't make sense if ID data was read
2120 * successfully at least once.
2124 swap_buf_le16(id
, ATA_ID_WORDS
);
2128 reason
= "device reports invalid type";
2130 if (class == ATA_DEV_ATA
) {
2131 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2134 if (ata_id_is_ata(id
))
2138 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2141 * Drive powered-up in standby mode, and requires a specific
2142 * SET_FEATURES spin-up subcommand before it will accept
2143 * anything other than the original IDENTIFY command.
2145 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2146 if (err_mask
&& id
[2] != 0x738c) {
2148 reason
= "SPINUP failed";
2152 * If the drive initially returned incomplete IDENTIFY info,
2153 * we now must reissue the IDENTIFY command.
2155 if (id
[2] == 0x37c8)
2159 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2161 * The exact sequence expected by certain pre-ATA4 drives is:
2163 * IDENTIFY (optional in early ATA)
2164 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2166 * Some drives were very specific about that exact sequence.
2168 * Note that ATA4 says lba is mandatory so the second check
2169 * shoud never trigger.
2171 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2172 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2175 reason
= "INIT_DEV_PARAMS failed";
2179 /* current CHS translation info (id[53-58]) might be
2180 * changed. reread the identify device info.
2182 flags
&= ~ATA_READID_POSTRESET
;
2192 if (ata_msg_warn(ap
))
2193 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2194 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2198 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2200 struct ata_port
*ap
= dev
->link
->ap
;
2201 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2204 static void ata_dev_config_ncq(struct ata_device
*dev
,
2205 char *desc
, size_t desc_sz
)
2207 struct ata_port
*ap
= dev
->link
->ap
;
2208 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2210 if (!ata_id_has_ncq(dev
->id
)) {
2214 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2215 snprintf(desc
, desc_sz
, "NCQ (not used)");
2218 if (ap
->flags
& ATA_FLAG_NCQ
) {
2219 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2220 dev
->flags
|= ATA_DFLAG_NCQ
;
2223 if (hdepth
>= ddepth
)
2224 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2226 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2230 * ata_dev_configure - Configure the specified ATA/ATAPI device
2231 * @dev: Target device to configure
2233 * Configure @dev according to @dev->id. Generic and low-level
2234 * driver specific fixups are also applied.
2237 * Kernel thread context (may sleep)
2240 * 0 on success, -errno otherwise
2242 int ata_dev_configure(struct ata_device
*dev
)
2244 struct ata_port
*ap
= dev
->link
->ap
;
2245 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2246 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2247 const u16
*id
= dev
->id
;
2248 unsigned long xfer_mask
;
2249 char revbuf
[7]; /* XYZ-99\0 */
2250 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2251 char modelbuf
[ATA_ID_PROD_LEN
+1];
2254 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2255 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2260 if (ata_msg_probe(ap
))
2261 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __FUNCTION__
);
2264 dev
->horkage
|= ata_dev_blacklisted(dev
);
2265 ata_force_horkage(dev
);
2267 /* let ACPI work its magic */
2268 rc
= ata_acpi_on_devcfg(dev
);
2272 /* massage HPA, do it early as it might change IDENTIFY data */
2273 rc
= ata_hpa_resize(dev
);
2277 /* print device capabilities */
2278 if (ata_msg_probe(ap
))
2279 ata_dev_printk(dev
, KERN_DEBUG
,
2280 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2281 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2283 id
[49], id
[82], id
[83], id
[84],
2284 id
[85], id
[86], id
[87], id
[88]);
2286 /* initialize to-be-configured parameters */
2287 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2288 dev
->max_sectors
= 0;
2296 * common ATA, ATAPI feature tests
2299 /* find max transfer mode; for printk only */
2300 xfer_mask
= ata_id_xfermask(id
);
2302 if (ata_msg_probe(ap
))
2305 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2306 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2309 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2312 /* ATA-specific feature tests */
2313 if (dev
->class == ATA_DEV_ATA
) {
2314 if (ata_id_is_cfa(id
)) {
2315 if (id
[162] & 1) /* CPRM may make this media unusable */
2316 ata_dev_printk(dev
, KERN_WARNING
,
2317 "supports DRM functions and may "
2318 "not be fully accessable.\n");
2319 snprintf(revbuf
, 7, "CFA");
2321 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2322 /* Warn the user if the device has TPM extensions */
2323 if (ata_id_has_tpm(id
))
2324 ata_dev_printk(dev
, KERN_WARNING
,
2325 "supports DRM functions and may "
2326 "not be fully accessable.\n");
2329 dev
->n_sectors
= ata_id_n_sectors(id
);
2331 if (dev
->id
[59] & 0x100)
2332 dev
->multi_count
= dev
->id
[59] & 0xff;
2334 if (ata_id_has_lba(id
)) {
2335 const char *lba_desc
;
2339 dev
->flags
|= ATA_DFLAG_LBA
;
2340 if (ata_id_has_lba48(id
)) {
2341 dev
->flags
|= ATA_DFLAG_LBA48
;
2344 if (dev
->n_sectors
>= (1UL << 28) &&
2345 ata_id_has_flush_ext(id
))
2346 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2350 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2352 /* print device info to dmesg */
2353 if (ata_msg_drv(ap
) && print_info
) {
2354 ata_dev_printk(dev
, KERN_INFO
,
2355 "%s: %s, %s, max %s\n",
2356 revbuf
, modelbuf
, fwrevbuf
,
2357 ata_mode_string(xfer_mask
));
2358 ata_dev_printk(dev
, KERN_INFO
,
2359 "%Lu sectors, multi %u: %s %s\n",
2360 (unsigned long long)dev
->n_sectors
,
2361 dev
->multi_count
, lba_desc
, ncq_desc
);
2366 /* Default translation */
2367 dev
->cylinders
= id
[1];
2369 dev
->sectors
= id
[6];
2371 if (ata_id_current_chs_valid(id
)) {
2372 /* Current CHS translation is valid. */
2373 dev
->cylinders
= id
[54];
2374 dev
->heads
= id
[55];
2375 dev
->sectors
= id
[56];
2378 /* print device info to dmesg */
2379 if (ata_msg_drv(ap
) && print_info
) {
2380 ata_dev_printk(dev
, KERN_INFO
,
2381 "%s: %s, %s, max %s\n",
2382 revbuf
, modelbuf
, fwrevbuf
,
2383 ata_mode_string(xfer_mask
));
2384 ata_dev_printk(dev
, KERN_INFO
,
2385 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2386 (unsigned long long)dev
->n_sectors
,
2387 dev
->multi_count
, dev
->cylinders
,
2388 dev
->heads
, dev
->sectors
);
2395 /* ATAPI-specific feature tests */
2396 else if (dev
->class == ATA_DEV_ATAPI
) {
2397 const char *cdb_intr_string
= "";
2398 const char *atapi_an_string
= "";
2401 rc
= atapi_cdb_len(id
);
2402 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2403 if (ata_msg_warn(ap
))
2404 ata_dev_printk(dev
, KERN_WARNING
,
2405 "unsupported CDB len\n");
2409 dev
->cdb_len
= (unsigned int) rc
;
2411 /* Enable ATAPI AN if both the host and device have
2412 * the support. If PMP is attached, SNTF is required
2413 * to enable ATAPI AN to discern between PHY status
2414 * changed notifications and ATAPI ANs.
2416 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2417 (!ap
->nr_pmp_links
||
2418 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2419 unsigned int err_mask
;
2421 /* issue SET feature command to turn this on */
2422 err_mask
= ata_dev_set_feature(dev
,
2423 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2425 ata_dev_printk(dev
, KERN_ERR
,
2426 "failed to enable ATAPI AN "
2427 "(err_mask=0x%x)\n", err_mask
);
2429 dev
->flags
|= ATA_DFLAG_AN
;
2430 atapi_an_string
= ", ATAPI AN";
2434 if (ata_id_cdb_intr(dev
->id
)) {
2435 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2436 cdb_intr_string
= ", CDB intr";
2439 /* print device info to dmesg */
2440 if (ata_msg_drv(ap
) && print_info
)
2441 ata_dev_printk(dev
, KERN_INFO
,
2442 "ATAPI: %s, %s, max %s%s%s\n",
2444 ata_mode_string(xfer_mask
),
2445 cdb_intr_string
, atapi_an_string
);
2448 /* determine max_sectors */
2449 dev
->max_sectors
= ATA_MAX_SECTORS
;
2450 if (dev
->flags
& ATA_DFLAG_LBA48
)
2451 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2453 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2454 if (ata_id_has_hipm(dev
->id
))
2455 dev
->flags
|= ATA_DFLAG_HIPM
;
2456 if (ata_id_has_dipm(dev
->id
))
2457 dev
->flags
|= ATA_DFLAG_DIPM
;
2460 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2462 if (ata_dev_knobble(dev
)) {
2463 if (ata_msg_drv(ap
) && print_info
)
2464 ata_dev_printk(dev
, KERN_INFO
,
2465 "applying bridge limits\n");
2466 dev
->udma_mask
&= ATA_UDMA5
;
2467 dev
->max_sectors
= ATA_MAX_SECTORS
;
2470 if ((dev
->class == ATA_DEV_ATAPI
) &&
2471 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2472 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2473 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2476 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2477 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2480 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2481 dev
->horkage
|= ATA_HORKAGE_IPM
;
2483 /* reset link pm_policy for this port to no pm */
2484 ap
->pm_policy
= MAX_PERFORMANCE
;
2487 if (ap
->ops
->dev_config
)
2488 ap
->ops
->dev_config(dev
);
2490 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2491 /* Let the user know. We don't want to disallow opens for
2492 rescue purposes, or in case the vendor is just a blithering
2493 idiot. Do this after the dev_config call as some controllers
2494 with buggy firmware may want to avoid reporting false device
2498 ata_dev_printk(dev
, KERN_WARNING
,
2499 "Drive reports diagnostics failure. This may indicate a drive\n");
2500 ata_dev_printk(dev
, KERN_WARNING
,
2501 "fault or invalid emulation. Contact drive vendor for information.\n");
2505 if (ata_msg_probe(ap
))
2506 ata_dev_printk(dev
, KERN_DEBUG
, "%s: EXIT, drv_stat = 0x%x\n",
2507 __FUNCTION__
, ata_chk_status(ap
));
2511 if (ata_msg_probe(ap
))
2512 ata_dev_printk(dev
, KERN_DEBUG
,
2513 "%s: EXIT, err\n", __FUNCTION__
);
2518 * ata_cable_40wire - return 40 wire cable type
2521 * Helper method for drivers which want to hardwire 40 wire cable
2525 int ata_cable_40wire(struct ata_port
*ap
)
2527 return ATA_CBL_PATA40
;
2531 * ata_cable_80wire - return 80 wire cable type
2534 * Helper method for drivers which want to hardwire 80 wire cable
2538 int ata_cable_80wire(struct ata_port
*ap
)
2540 return ATA_CBL_PATA80
;
2544 * ata_cable_unknown - return unknown PATA cable.
2547 * Helper method for drivers which have no PATA cable detection.
2550 int ata_cable_unknown(struct ata_port
*ap
)
2552 return ATA_CBL_PATA_UNK
;
2556 * ata_cable_ignore - return ignored PATA cable.
2559 * Helper method for drivers which don't use cable type to limit
2562 int ata_cable_ignore(struct ata_port
*ap
)
2564 return ATA_CBL_PATA_IGN
;
2568 * ata_cable_sata - return SATA cable type
2571 * Helper method for drivers which have SATA cables
2574 int ata_cable_sata(struct ata_port
*ap
)
2576 return ATA_CBL_SATA
;
2580 * ata_bus_probe - Reset and probe ATA bus
2583 * Master ATA bus probing function. Initiates a hardware-dependent
2584 * bus reset, then attempts to identify any devices found on
2588 * PCI/etc. bus probe sem.
2591 * Zero on success, negative errno otherwise.
2594 int ata_bus_probe(struct ata_port
*ap
)
2596 unsigned int classes
[ATA_MAX_DEVICES
];
2597 int tries
[ATA_MAX_DEVICES
];
2599 struct ata_device
*dev
;
2603 ata_link_for_each_dev(dev
, &ap
->link
)
2604 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2607 ata_link_for_each_dev(dev
, &ap
->link
) {
2608 /* If we issue an SRST then an ATA drive (not ATAPI)
2609 * may change configuration and be in PIO0 timing. If
2610 * we do a hard reset (or are coming from power on)
2611 * this is true for ATA or ATAPI. Until we've set a
2612 * suitable controller mode we should not touch the
2613 * bus as we may be talking too fast.
2615 dev
->pio_mode
= XFER_PIO_0
;
2617 /* If the controller has a pio mode setup function
2618 * then use it to set the chipset to rights. Don't
2619 * touch the DMA setup as that will be dealt with when
2620 * configuring devices.
2622 if (ap
->ops
->set_piomode
)
2623 ap
->ops
->set_piomode(ap
, dev
);
2626 /* reset and determine device classes */
2627 ap
->ops
->phy_reset(ap
);
2629 ata_link_for_each_dev(dev
, &ap
->link
) {
2630 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2631 dev
->class != ATA_DEV_UNKNOWN
)
2632 classes
[dev
->devno
] = dev
->class;
2634 classes
[dev
->devno
] = ATA_DEV_NONE
;
2636 dev
->class = ATA_DEV_UNKNOWN
;
2641 /* read IDENTIFY page and configure devices. We have to do the identify
2642 specific sequence bass-ackwards so that PDIAG- is released by
2645 ata_link_for_each_dev(dev
, &ap
->link
) {
2646 if (tries
[dev
->devno
])
2647 dev
->class = classes
[dev
->devno
];
2649 if (!ata_dev_enabled(dev
))
2652 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2658 /* Now ask for the cable type as PDIAG- should have been released */
2659 if (ap
->ops
->cable_detect
)
2660 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2662 /* We may have SATA bridge glue hiding here irrespective of the
2663 reported cable types and sensed types */
2664 ata_link_for_each_dev(dev
, &ap
->link
) {
2665 if (!ata_dev_enabled(dev
))
2667 /* SATA drives indicate we have a bridge. We don't know which
2668 end of the link the bridge is which is a problem */
2669 if (ata_id_is_sata(dev
->id
))
2670 ap
->cbl
= ATA_CBL_SATA
;
2673 /* After the identify sequence we can now set up the devices. We do
2674 this in the normal order so that the user doesn't get confused */
2676 ata_link_for_each_dev(dev
, &ap
->link
) {
2677 if (!ata_dev_enabled(dev
))
2680 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2681 rc
= ata_dev_configure(dev
);
2682 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2687 /* configure transfer mode */
2688 rc
= ata_set_mode(&ap
->link
, &dev
);
2692 ata_link_for_each_dev(dev
, &ap
->link
)
2693 if (ata_dev_enabled(dev
))
2696 /* no device present, disable port */
2697 ata_port_disable(ap
);
2701 tries
[dev
->devno
]--;
2705 /* eeek, something went very wrong, give up */
2706 tries
[dev
->devno
] = 0;
2710 /* give it just one more chance */
2711 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2713 if (tries
[dev
->devno
] == 1) {
2714 /* This is the last chance, better to slow
2715 * down than lose it.
2717 sata_down_spd_limit(&ap
->link
);
2718 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2722 if (!tries
[dev
->devno
])
2723 ata_dev_disable(dev
);
2729 * ata_port_probe - Mark port as enabled
2730 * @ap: Port for which we indicate enablement
2732 * Modify @ap data structure such that the system
2733 * thinks that the entire port is enabled.
2735 * LOCKING: host lock, or some other form of
2739 void ata_port_probe(struct ata_port
*ap
)
2741 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2745 * sata_print_link_status - Print SATA link status
2746 * @link: SATA link to printk link status about
2748 * This function prints link speed and status of a SATA link.
2753 void sata_print_link_status(struct ata_link
*link
)
2755 u32 sstatus
, scontrol
, tmp
;
2757 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2759 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2761 if (ata_link_online(link
)) {
2762 tmp
= (sstatus
>> 4) & 0xf;
2763 ata_link_printk(link
, KERN_INFO
,
2764 "SATA link up %s (SStatus %X SControl %X)\n",
2765 sata_spd_string(tmp
), sstatus
, scontrol
);
2767 ata_link_printk(link
, KERN_INFO
,
2768 "SATA link down (SStatus %X SControl %X)\n",
2774 * ata_dev_pair - return other device on cable
2777 * Obtain the other device on the same cable, or if none is
2778 * present NULL is returned
2781 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2783 struct ata_link
*link
= adev
->link
;
2784 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2785 if (!ata_dev_enabled(pair
))
2791 * ata_port_disable - Disable port.
2792 * @ap: Port to be disabled.
2794 * Modify @ap data structure such that the system
2795 * thinks that the entire port is disabled, and should
2796 * never attempt to probe or communicate with devices
2799 * LOCKING: host lock, or some other form of
2803 void ata_port_disable(struct ata_port
*ap
)
2805 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2806 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2807 ap
->flags
|= ATA_FLAG_DISABLED
;
2811 * sata_down_spd_limit - adjust SATA spd limit downward
2812 * @link: Link to adjust SATA spd limit for
2814 * Adjust SATA spd limit of @link downward. Note that this
2815 * function only adjusts the limit. The change must be applied
2816 * using sata_set_spd().
2819 * Inherited from caller.
2822 * 0 on success, negative errno on failure
2824 int sata_down_spd_limit(struct ata_link
*link
)
2826 u32 sstatus
, spd
, mask
;
2829 if (!sata_scr_valid(link
))
2832 /* If SCR can be read, use it to determine the current SPD.
2833 * If not, use cached value in link->sata_spd.
2835 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2837 spd
= (sstatus
>> 4) & 0xf;
2839 spd
= link
->sata_spd
;
2841 mask
= link
->sata_spd_limit
;
2845 /* unconditionally mask off the highest bit */
2846 highbit
= fls(mask
) - 1;
2847 mask
&= ~(1 << highbit
);
2849 /* Mask off all speeds higher than or equal to the current
2850 * one. Force 1.5Gbps if current SPD is not available.
2853 mask
&= (1 << (spd
- 1)) - 1;
2857 /* were we already at the bottom? */
2861 link
->sata_spd_limit
= mask
;
2863 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2864 sata_spd_string(fls(mask
)));
2869 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2871 struct ata_link
*host_link
= &link
->ap
->link
;
2872 u32 limit
, target
, spd
;
2874 limit
= link
->sata_spd_limit
;
2876 /* Don't configure downstream link faster than upstream link.
2877 * It doesn't speed up anything and some PMPs choke on such
2880 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2881 limit
&= (1 << host_link
->sata_spd
) - 1;
2883 if (limit
== UINT_MAX
)
2886 target
= fls(limit
);
2888 spd
= (*scontrol
>> 4) & 0xf;
2889 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2891 return spd
!= target
;
2895 * sata_set_spd_needed - is SATA spd configuration needed
2896 * @link: Link in question
2898 * Test whether the spd limit in SControl matches
2899 * @link->sata_spd_limit. This function is used to determine
2900 * whether hardreset is necessary to apply SATA spd
2904 * Inherited from caller.
2907 * 1 if SATA spd configuration is needed, 0 otherwise.
2909 int sata_set_spd_needed(struct ata_link
*link
)
2913 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2916 return __sata_set_spd_needed(link
, &scontrol
);
2920 * sata_set_spd - set SATA spd according to spd limit
2921 * @link: Link to set SATA spd for
2923 * Set SATA spd of @link according to sata_spd_limit.
2926 * Inherited from caller.
2929 * 0 if spd doesn't need to be changed, 1 if spd has been
2930 * changed. Negative errno if SCR registers are inaccessible.
2932 int sata_set_spd(struct ata_link
*link
)
2937 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2940 if (!__sata_set_spd_needed(link
, &scontrol
))
2943 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2950 * This mode timing computation functionality is ported over from
2951 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2954 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2955 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2956 * for UDMA6, which is currently supported only by Maxtor drives.
2958 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2961 static const struct ata_timing ata_timing
[] = {
2962 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2963 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2964 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2965 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2966 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2967 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2968 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2969 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2971 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2972 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2973 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2975 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2976 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2977 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2978 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2979 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2981 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2982 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2983 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2984 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2985 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2986 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2987 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2988 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2993 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2994 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2996 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2998 q
->setup
= EZ(t
->setup
* 1000, T
);
2999 q
->act8b
= EZ(t
->act8b
* 1000, T
);
3000 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
3001 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
3002 q
->active
= EZ(t
->active
* 1000, T
);
3003 q
->recover
= EZ(t
->recover
* 1000, T
);
3004 q
->cycle
= EZ(t
->cycle
* 1000, T
);
3005 q
->udma
= EZ(t
->udma
* 1000, UT
);
3008 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
3009 struct ata_timing
*m
, unsigned int what
)
3011 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
3012 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
3013 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
3014 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
3015 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
3016 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
3017 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
3018 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
3021 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
3023 const struct ata_timing
*t
= ata_timing
;
3025 while (xfer_mode
> t
->mode
)
3028 if (xfer_mode
== t
->mode
)
3033 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
3034 struct ata_timing
*t
, int T
, int UT
)
3036 const struct ata_timing
*s
;
3037 struct ata_timing p
;
3043 if (!(s
= ata_timing_find_mode(speed
)))
3046 memcpy(t
, s
, sizeof(*s
));
3049 * If the drive is an EIDE drive, it can tell us it needs extended
3050 * PIO/MW_DMA cycle timing.
3053 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
3054 memset(&p
, 0, sizeof(p
));
3055 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
3056 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
3057 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
3058 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
3059 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
3061 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
3065 * Convert the timing to bus clock counts.
3068 ata_timing_quantize(t
, t
, T
, UT
);
3071 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3072 * S.M.A.R.T * and some other commands. We have to ensure that the
3073 * DMA cycle timing is slower/equal than the fastest PIO timing.
3076 if (speed
> XFER_PIO_6
) {
3077 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3078 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3082 * Lengthen active & recovery time so that cycle time is correct.
3085 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3086 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3087 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3090 if (t
->active
+ t
->recover
< t
->cycle
) {
3091 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3092 t
->recover
= t
->cycle
- t
->active
;
3095 /* In a few cases quantisation may produce enough errors to
3096 leave t->cycle too low for the sum of active and recovery
3097 if so we must correct this */
3098 if (t
->active
+ t
->recover
> t
->cycle
)
3099 t
->cycle
= t
->active
+ t
->recover
;
3105 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3106 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3107 * @cycle: cycle duration in ns
3109 * Return matching xfer mode for @cycle. The returned mode is of
3110 * the transfer type specified by @xfer_shift. If @cycle is too
3111 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3112 * than the fastest known mode, the fasted mode is returned.
3118 * Matching xfer_mode, 0xff if no match found.
3120 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3122 u8 base_mode
= 0xff, last_mode
= 0xff;
3123 const struct ata_xfer_ent
*ent
;
3124 const struct ata_timing
*t
;
3126 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3127 if (ent
->shift
== xfer_shift
)
3128 base_mode
= ent
->base
;
3130 for (t
= ata_timing_find_mode(base_mode
);
3131 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3132 unsigned short this_cycle
;
3134 switch (xfer_shift
) {
3136 case ATA_SHIFT_MWDMA
:
3137 this_cycle
= t
->cycle
;
3139 case ATA_SHIFT_UDMA
:
3140 this_cycle
= t
->udma
;
3146 if (cycle
> this_cycle
)
3149 last_mode
= t
->mode
;
3156 * ata_down_xfermask_limit - adjust dev xfer masks downward
3157 * @dev: Device to adjust xfer masks
3158 * @sel: ATA_DNXFER_* selector
3160 * Adjust xfer masks of @dev downward. Note that this function
3161 * does not apply the change. Invoking ata_set_mode() afterwards
3162 * will apply the limit.
3165 * Inherited from caller.
3168 * 0 on success, negative errno on failure
3170 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3173 unsigned long orig_mask
, xfer_mask
;
3174 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3177 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3178 sel
&= ~ATA_DNXFER_QUIET
;
3180 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3183 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3186 case ATA_DNXFER_PIO
:
3187 highbit
= fls(pio_mask
) - 1;
3188 pio_mask
&= ~(1 << highbit
);
3191 case ATA_DNXFER_DMA
:
3193 highbit
= fls(udma_mask
) - 1;
3194 udma_mask
&= ~(1 << highbit
);
3197 } else if (mwdma_mask
) {
3198 highbit
= fls(mwdma_mask
) - 1;
3199 mwdma_mask
&= ~(1 << highbit
);
3205 case ATA_DNXFER_40C
:
3206 udma_mask
&= ATA_UDMA_MASK_40C
;
3209 case ATA_DNXFER_FORCE_PIO0
:
3211 case ATA_DNXFER_FORCE_PIO
:
3220 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3222 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3226 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3227 snprintf(buf
, sizeof(buf
), "%s:%s",
3228 ata_mode_string(xfer_mask
),
3229 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3231 snprintf(buf
, sizeof(buf
), "%s",
3232 ata_mode_string(xfer_mask
));
3234 ata_dev_printk(dev
, KERN_WARNING
,
3235 "limiting speed to %s\n", buf
);
3238 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3244 static int ata_dev_set_mode(struct ata_device
*dev
)
3246 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3247 const char *dev_err_whine
= "";
3248 int ign_dev_err
= 0;
3249 unsigned int err_mask
;
3252 dev
->flags
&= ~ATA_DFLAG_PIO
;
3253 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3254 dev
->flags
|= ATA_DFLAG_PIO
;
3256 err_mask
= ata_dev_set_xfermode(dev
);
3258 if (err_mask
& ~AC_ERR_DEV
)
3262 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3263 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3264 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3268 /* Old CFA may refuse this command, which is just fine */
3269 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3272 /* Some very old devices and some bad newer ones fail any kind of
3273 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3274 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3275 dev
->pio_mode
<= XFER_PIO_2
)
3278 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3279 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3280 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3281 dev
->dma_mode
== XFER_MW_DMA_0
&&
3282 (dev
->id
[63] >> 8) & 1)
3285 /* if the device is actually configured correctly, ignore dev err */
3286 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3289 if (err_mask
& AC_ERR_DEV
) {
3293 dev_err_whine
= " (device error ignored)";
3296 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3297 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3299 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3300 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3306 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3307 "(err_mask=0x%x)\n", err_mask
);
3312 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3313 * @link: link on which timings will be programmed
3314 * @r_failed_dev: out parameter for failed device
3316 * Standard implementation of the function used to tune and set
3317 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3318 * ata_dev_set_mode() fails, pointer to the failing device is
3319 * returned in @r_failed_dev.
3322 * PCI/etc. bus probe sem.
3325 * 0 on success, negative errno otherwise
3328 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3330 struct ata_port
*ap
= link
->ap
;
3331 struct ata_device
*dev
;
3332 int rc
= 0, used_dma
= 0, found
= 0;
3334 /* step 1: calculate xfer_mask */
3335 ata_link_for_each_dev(dev
, link
) {
3336 unsigned long pio_mask
, dma_mask
;
3337 unsigned int mode_mask
;
3339 if (!ata_dev_enabled(dev
))
3342 mode_mask
= ATA_DMA_MASK_ATA
;
3343 if (dev
->class == ATA_DEV_ATAPI
)
3344 mode_mask
= ATA_DMA_MASK_ATAPI
;
3345 else if (ata_id_is_cfa(dev
->id
))
3346 mode_mask
= ATA_DMA_MASK_CFA
;
3348 ata_dev_xfermask(dev
);
3349 ata_force_xfermask(dev
);
3351 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3352 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3354 if (libata_dma_mask
& mode_mask
)
3355 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3359 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3360 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3363 if (dev
->dma_mode
!= 0xff)
3369 /* step 2: always set host PIO timings */
3370 ata_link_for_each_dev(dev
, link
) {
3371 if (!ata_dev_enabled(dev
))
3374 if (dev
->pio_mode
== 0xff) {
3375 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3380 dev
->xfer_mode
= dev
->pio_mode
;
3381 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3382 if (ap
->ops
->set_piomode
)
3383 ap
->ops
->set_piomode(ap
, dev
);
3386 /* step 3: set host DMA timings */
3387 ata_link_for_each_dev(dev
, link
) {
3388 if (!ata_dev_enabled(dev
) || dev
->dma_mode
== 0xff)
3391 dev
->xfer_mode
= dev
->dma_mode
;
3392 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3393 if (ap
->ops
->set_dmamode
)
3394 ap
->ops
->set_dmamode(ap
, dev
);
3397 /* step 4: update devices' xfer mode */
3398 ata_link_for_each_dev(dev
, link
) {
3399 /* don't update suspended devices' xfer mode */
3400 if (!ata_dev_enabled(dev
))
3403 rc
= ata_dev_set_mode(dev
);
3408 /* Record simplex status. If we selected DMA then the other
3409 * host channels are not permitted to do so.
3411 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3412 ap
->host
->simplex_claimed
= ap
;
3416 *r_failed_dev
= dev
;
3421 * ata_tf_to_host - issue ATA taskfile to host controller
3422 * @ap: port to which command is being issued
3423 * @tf: ATA taskfile register set
3425 * Issues ATA taskfile register set to ATA host controller,
3426 * with proper synchronization with interrupt handler and
3430 * spin_lock_irqsave(host lock)
3433 static inline void ata_tf_to_host(struct ata_port
*ap
,
3434 const struct ata_taskfile
*tf
)
3436 ap
->ops
->tf_load(ap
, tf
);
3437 ap
->ops
->exec_command(ap
, tf
);
3441 * ata_busy_sleep - sleep until BSY clears, or timeout
3442 * @ap: port containing status register to be polled
3443 * @tmout_pat: impatience timeout
3444 * @tmout: overall timeout
3446 * Sleep until ATA Status register bit BSY clears,
3447 * or a timeout occurs.
3450 * Kernel thread context (may sleep).
3453 * 0 on success, -errno otherwise.
3455 int ata_busy_sleep(struct ata_port
*ap
,
3456 unsigned long tmout_pat
, unsigned long tmout
)
3458 unsigned long timer_start
, timeout
;
3461 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
3462 timer_start
= jiffies
;
3463 timeout
= timer_start
+ tmout_pat
;
3464 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3465 time_before(jiffies
, timeout
)) {
3467 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
3470 if (status
!= 0xff && (status
& ATA_BUSY
))
3471 ata_port_printk(ap
, KERN_WARNING
,
3472 "port is slow to respond, please be patient "
3473 "(Status 0x%x)\n", status
);
3475 timeout
= timer_start
+ tmout
;
3476 while (status
!= 0xff && (status
& ATA_BUSY
) &&
3477 time_before(jiffies
, timeout
)) {
3479 status
= ata_chk_status(ap
);
3485 if (status
& ATA_BUSY
) {
3486 ata_port_printk(ap
, KERN_ERR
, "port failed to respond "
3487 "(%lu secs, Status 0x%x)\n",
3488 tmout
/ HZ
, status
);
3496 * ata_wait_after_reset - wait before checking status after reset
3497 * @ap: port containing status register to be polled
3498 * @deadline: deadline jiffies for the operation
3500 * After reset, we need to pause a while before reading status.
3501 * Also, certain combination of controller and device report 0xff
3502 * for some duration (e.g. until SATA PHY is up and running)
3503 * which is interpreted as empty port in ATA world. This
3504 * function also waits for such devices to get out of 0xff
3508 * Kernel thread context (may sleep).
3510 void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
)
3512 unsigned long until
= jiffies
+ ATA_TMOUT_FF_WAIT
;
3514 if (time_before(until
, deadline
))
3517 /* Spec mandates ">= 2ms" before checking status. We wait
3518 * 150ms, because that was the magic delay used for ATAPI
3519 * devices in Hale Landis's ATADRVR, for the period of time
3520 * between when the ATA command register is written, and then
3521 * status is checked. Because waiting for "a while" before
3522 * checking status is fine, post SRST, we perform this magic
3523 * delay here as well.
3525 * Old drivers/ide uses the 2mS rule and then waits for ready.
3529 /* Wait for 0xff to clear. Some SATA devices take a long time
3530 * to clear 0xff after reset. For example, HHD424020F7SV00
3531 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3534 * Note that some PATA controllers (pata_ali) explode if
3535 * status register is read more than once when there's no
3538 if (ap
->flags
& ATA_FLAG_SATA
) {
3540 u8 status
= ata_chk_status(ap
);
3542 if (status
!= 0xff || time_after(jiffies
, deadline
))
3551 * ata_wait_ready - sleep until BSY clears, or timeout
3552 * @ap: port containing status register to be polled
3553 * @deadline: deadline jiffies for the operation
3555 * Sleep until ATA Status register bit BSY clears, or timeout
3559 * Kernel thread context (may sleep).
3562 * 0 on success, -errno otherwise.
3564 int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
)
3566 unsigned long start
= jiffies
;
3570 u8 status
= ata_chk_status(ap
);
3571 unsigned long now
= jiffies
;
3573 if (!(status
& ATA_BUSY
))
3575 if (!ata_link_online(&ap
->link
) && status
== 0xff)
3577 if (time_after(now
, deadline
))
3580 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3581 (deadline
- now
> 3 * HZ
)) {
3582 ata_port_printk(ap
, KERN_WARNING
,
3583 "port is slow to respond, please be patient "
3584 "(Status 0x%x)\n", status
);
3592 static int ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
,
3593 unsigned long deadline
)
3595 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3596 unsigned int dev0
= devmask
& (1 << 0);
3597 unsigned int dev1
= devmask
& (1 << 1);
3600 /* if device 0 was found in ata_devchk, wait for its
3604 rc
= ata_wait_ready(ap
, deadline
);
3612 /* if device 1 was found in ata_devchk, wait for register
3613 * access briefly, then wait for BSY to clear.
3618 ap
->ops
->dev_select(ap
, 1);
3620 /* Wait for register access. Some ATAPI devices fail
3621 * to set nsect/lbal after reset, so don't waste too
3622 * much time on it. We're gonna wait for !BSY anyway.
3624 for (i
= 0; i
< 2; i
++) {
3627 nsect
= ioread8(ioaddr
->nsect_addr
);
3628 lbal
= ioread8(ioaddr
->lbal_addr
);
3629 if ((nsect
== 1) && (lbal
== 1))
3631 msleep(50); /* give drive a breather */
3634 rc
= ata_wait_ready(ap
, deadline
);
3642 /* is all this really necessary? */
3643 ap
->ops
->dev_select(ap
, 0);
3645 ap
->ops
->dev_select(ap
, 1);
3647 ap
->ops
->dev_select(ap
, 0);
3652 static int ata_bus_softreset(struct ata_port
*ap
, unsigned int devmask
,
3653 unsigned long deadline
)
3655 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3657 DPRINTK("ata%u: bus reset via SRST\n", ap
->print_id
);
3659 /* software reset. causes dev0 to be selected */
3660 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3661 udelay(20); /* FIXME: flush */
3662 iowrite8(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
3663 udelay(20); /* FIXME: flush */
3664 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3666 /* wait a while before checking status */
3667 ata_wait_after_reset(ap
, deadline
);
3669 /* Before we perform post reset processing we want to see if
3670 * the bus shows 0xFF because the odd clown forgets the D7
3671 * pulldown resistor.
3673 if (ata_chk_status(ap
) == 0xFF)
3676 return ata_bus_post_reset(ap
, devmask
, deadline
);
3680 * ata_bus_reset - reset host port and associated ATA channel
3681 * @ap: port to reset
3683 * This is typically the first time we actually start issuing
3684 * commands to the ATA channel. We wait for BSY to clear, then
3685 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3686 * result. Determine what devices, if any, are on the channel
3687 * by looking at the device 0/1 error register. Look at the signature
3688 * stored in each device's taskfile registers, to determine if
3689 * the device is ATA or ATAPI.
3692 * PCI/etc. bus probe sem.
3693 * Obtains host lock.
3696 * Sets ATA_FLAG_DISABLED if bus reset fails.
3699 void ata_bus_reset(struct ata_port
*ap
)
3701 struct ata_device
*device
= ap
->link
.device
;
3702 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
3703 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3705 unsigned int dev0
, dev1
= 0, devmask
= 0;
3708 DPRINTK("ENTER, host %u, port %u\n", ap
->print_id
, ap
->port_no
);
3710 /* determine if device 0/1 are present */
3711 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
3714 dev0
= ata_devchk(ap
, 0);
3716 dev1
= ata_devchk(ap
, 1);
3720 devmask
|= (1 << 0);
3722 devmask
|= (1 << 1);
3724 /* select device 0 again */
3725 ap
->ops
->dev_select(ap
, 0);
3727 /* issue bus reset */
3728 if (ap
->flags
& ATA_FLAG_SRST
) {
3729 rc
= ata_bus_softreset(ap
, devmask
, jiffies
+ 40 * HZ
);
3730 if (rc
&& rc
!= -ENODEV
)
3735 * determine by signature whether we have ATA or ATAPI devices
3737 device
[0].class = ata_dev_try_classify(&device
[0], dev0
, &err
);
3738 if ((slave_possible
) && (err
!= 0x81))
3739 device
[1].class = ata_dev_try_classify(&device
[1], dev1
, &err
);
3741 /* is double-select really necessary? */
3742 if (device
[1].class != ATA_DEV_NONE
)
3743 ap
->ops
->dev_select(ap
, 1);
3744 if (device
[0].class != ATA_DEV_NONE
)
3745 ap
->ops
->dev_select(ap
, 0);
3747 /* if no devices were detected, disable this port */
3748 if ((device
[0].class == ATA_DEV_NONE
) &&
3749 (device
[1].class == ATA_DEV_NONE
))
3752 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
3753 /* set up device control for ATA_FLAG_SATA_RESET */
3754 iowrite8(ap
->ctl
, ioaddr
->ctl_addr
);
3761 ata_port_printk(ap
, KERN_ERR
, "disabling port\n");
3762 ata_port_disable(ap
);
3768 * sata_link_debounce - debounce SATA phy status
3769 * @link: ATA link to debounce SATA phy status for
3770 * @params: timing parameters { interval, duratinon, timeout } in msec
3771 * @deadline: deadline jiffies for the operation
3773 * Make sure SStatus of @link reaches stable state, determined by
3774 * holding the same value where DET is not 1 for @duration polled
3775 * every @interval, before @timeout. Timeout constraints the
3776 * beginning of the stable state. Because DET gets stuck at 1 on
3777 * some controllers after hot unplugging, this functions waits
3778 * until timeout then returns 0 if DET is stable at 1.
3780 * @timeout is further limited by @deadline. The sooner of the
3784 * Kernel thread context (may sleep)
3787 * 0 on success, -errno on failure.
3789 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3790 unsigned long deadline
)
3792 unsigned long interval_msec
= params
[0];
3793 unsigned long duration
= msecs_to_jiffies(params
[1]);
3794 unsigned long last_jiffies
, t
;
3798 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3799 if (time_before(t
, deadline
))
3802 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3807 last_jiffies
= jiffies
;
3810 msleep(interval_msec
);
3811 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3817 if (cur
== 1 && time_before(jiffies
, deadline
))
3819 if (time_after(jiffies
, last_jiffies
+ duration
))
3824 /* unstable, start over */
3826 last_jiffies
= jiffies
;
3828 /* Check deadline. If debouncing failed, return
3829 * -EPIPE to tell upper layer to lower link speed.
3831 if (time_after(jiffies
, deadline
))
3837 * sata_link_resume - resume SATA link
3838 * @link: ATA link to resume SATA
3839 * @params: timing parameters { interval, duratinon, timeout } in msec
3840 * @deadline: deadline jiffies for the operation
3842 * Resume SATA phy @link and debounce it.
3845 * Kernel thread context (may sleep)
3848 * 0 on success, -errno on failure.
3850 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3851 unsigned long deadline
)
3856 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3859 scontrol
= (scontrol
& 0x0f0) | 0x300;
3861 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3864 /* Some PHYs react badly if SStatus is pounded immediately
3865 * after resuming. Delay 200ms before debouncing.
3869 return sata_link_debounce(link
, params
, deadline
);
3873 * ata_std_prereset - prepare for reset
3874 * @link: ATA link to be reset
3875 * @deadline: deadline jiffies for the operation
3877 * @link is about to be reset. Initialize it. Failure from
3878 * prereset makes libata abort whole reset sequence and give up
3879 * that port, so prereset should be best-effort. It does its
3880 * best to prepare for reset sequence but if things go wrong, it
3881 * should just whine, not fail.
3884 * Kernel thread context (may sleep)
3887 * 0 on success, -errno otherwise.
3889 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3891 struct ata_port
*ap
= link
->ap
;
3892 struct ata_eh_context
*ehc
= &link
->eh_context
;
3893 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3896 /* handle link resume */
3897 if ((ehc
->i
.flags
& ATA_EHI_RESUME_LINK
) &&
3898 (link
->flags
& ATA_LFLAG_HRST_TO_RESUME
))
3899 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3901 /* Some PMPs don't work with only SRST, force hardreset if PMP
3904 if (ap
->flags
& ATA_FLAG_PMP
)
3905 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3907 /* if we're about to do hardreset, nothing more to do */
3908 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3911 /* if SATA, resume link */
3912 if (ap
->flags
& ATA_FLAG_SATA
) {
3913 rc
= sata_link_resume(link
, timing
, deadline
);
3914 /* whine about phy resume failure but proceed */
3915 if (rc
&& rc
!= -EOPNOTSUPP
)
3916 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3917 "link for reset (errno=%d)\n", rc
);
3920 /* Wait for !BSY if the controller can wait for the first D2H
3921 * Reg FIS and we don't know that no device is attached.
3923 if (!(link
->flags
& ATA_LFLAG_SKIP_D2H_BSY
) && !ata_link_offline(link
)) {
3924 rc
= ata_wait_ready(ap
, deadline
);
3925 if (rc
&& rc
!= -ENODEV
) {
3926 ata_link_printk(link
, KERN_WARNING
, "device not ready "
3927 "(errno=%d), forcing hardreset\n", rc
);
3928 ehc
->i
.action
|= ATA_EH_HARDRESET
;
3936 * ata_std_softreset - reset host port via ATA SRST
3937 * @link: ATA link to reset
3938 * @classes: resulting classes of attached devices
3939 * @deadline: deadline jiffies for the operation
3941 * Reset host port using ATA SRST.
3944 * Kernel thread context (may sleep)
3947 * 0 on success, -errno otherwise.
3949 int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
3950 unsigned long deadline
)
3952 struct ata_port
*ap
= link
->ap
;
3953 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
3954 unsigned int devmask
= 0;
3960 if (ata_link_offline(link
)) {
3961 classes
[0] = ATA_DEV_NONE
;
3965 /* determine if device 0/1 are present */
3966 if (ata_devchk(ap
, 0))
3967 devmask
|= (1 << 0);
3968 if (slave_possible
&& ata_devchk(ap
, 1))
3969 devmask
|= (1 << 1);
3971 /* select device 0 again */
3972 ap
->ops
->dev_select(ap
, 0);
3974 /* issue bus reset */
3975 DPRINTK("about to softreset, devmask=%x\n", devmask
);
3976 rc
= ata_bus_softreset(ap
, devmask
, deadline
);
3977 /* if link is occupied, -ENODEV too is an error */
3978 if (rc
&& (rc
!= -ENODEV
|| sata_scr_valid(link
))) {
3979 ata_link_printk(link
, KERN_ERR
, "SRST failed (errno=%d)\n", rc
);
3983 /* determine by signature whether we have ATA or ATAPI devices */
3984 classes
[0] = ata_dev_try_classify(&link
->device
[0],
3985 devmask
& (1 << 0), &err
);
3986 if (slave_possible
&& err
!= 0x81)
3987 classes
[1] = ata_dev_try_classify(&link
->device
[1],
3988 devmask
& (1 << 1), &err
);
3991 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
3996 * sata_link_hardreset - reset link via SATA phy reset
3997 * @link: link to reset
3998 * @timing: timing parameters { interval, duratinon, timeout } in msec
3999 * @deadline: deadline jiffies for the operation
4001 * SATA phy-reset @link using DET bits of SControl register.
4004 * Kernel thread context (may sleep)
4007 * 0 on success, -errno otherwise.
4009 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
4010 unsigned long deadline
)
4017 if (sata_set_spd_needed(link
)) {
4018 /* SATA spec says nothing about how to reconfigure
4019 * spd. To be on the safe side, turn off phy during
4020 * reconfiguration. This works for at least ICH7 AHCI
4023 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
4026 scontrol
= (scontrol
& 0x0f0) | 0x304;
4028 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
4034 /* issue phy wake/reset */
4035 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
4038 scontrol
= (scontrol
& 0x0f0) | 0x301;
4040 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
4043 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
4044 * 10.4.2 says at least 1 ms.
4048 /* bring link back */
4049 rc
= sata_link_resume(link
, timing
, deadline
);
4051 DPRINTK("EXIT, rc=%d\n", rc
);
4056 * sata_std_hardreset - reset host port via SATA phy reset
4057 * @link: link to reset
4058 * @class: resulting class of attached device
4059 * @deadline: deadline jiffies for the operation
4061 * SATA phy-reset host port using DET bits of SControl register,
4062 * wait for !BSY and classify the attached device.
4065 * Kernel thread context (may sleep)
4068 * 0 on success, -errno otherwise.
4070 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
4071 unsigned long deadline
)
4073 struct ata_port
*ap
= link
->ap
;
4074 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
4080 rc
= sata_link_hardreset(link
, timing
, deadline
);
4082 ata_link_printk(link
, KERN_ERR
,
4083 "COMRESET failed (errno=%d)\n", rc
);
4087 /* TODO: phy layer with polling, timeouts, etc. */
4088 if (ata_link_offline(link
)) {
4089 *class = ATA_DEV_NONE
;
4090 DPRINTK("EXIT, link offline\n");
4094 /* wait a while before checking status */
4095 ata_wait_after_reset(ap
, deadline
);
4097 /* If PMP is supported, we have to do follow-up SRST. Note
4098 * that some PMPs don't send D2H Reg FIS after hardreset at
4099 * all if the first port is empty. Wait for it just for a
4100 * second and request follow-up SRST.
4102 if (ap
->flags
& ATA_FLAG_PMP
) {
4103 ata_wait_ready(ap
, jiffies
+ HZ
);
4107 rc
= ata_wait_ready(ap
, deadline
);
4108 /* link occupied, -ENODEV too is an error */
4110 ata_link_printk(link
, KERN_ERR
,
4111 "COMRESET failed (errno=%d)\n", rc
);
4115 ap
->ops
->dev_select(ap
, 0); /* probably unnecessary */
4117 *class = ata_dev_try_classify(link
->device
, 1, NULL
);
4119 DPRINTK("EXIT, class=%u\n", *class);
4124 * ata_std_postreset - standard postreset callback
4125 * @link: the target ata_link
4126 * @classes: classes of attached devices
4128 * This function is invoked after a successful reset. Note that
4129 * the device might have been reset more than once using
4130 * different reset methods before postreset is invoked.
4133 * Kernel thread context (may sleep)
4135 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
4137 struct ata_port
*ap
= link
->ap
;
4142 /* print link status */
4143 sata_print_link_status(link
);
4146 if (sata_scr_read(link
, SCR_ERROR
, &serror
) == 0)
4147 sata_scr_write(link
, SCR_ERROR
, serror
);
4148 link
->eh_info
.serror
= 0;
4150 /* is double-select really necessary? */
4151 if (classes
[0] != ATA_DEV_NONE
)
4152 ap
->ops
->dev_select(ap
, 1);
4153 if (classes
[1] != ATA_DEV_NONE
)
4154 ap
->ops
->dev_select(ap
, 0);
4156 /* bail out if no device is present */
4157 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
4158 DPRINTK("EXIT, no device\n");
4162 /* set up device control */
4163 if (ap
->ioaddr
.ctl_addr
)
4164 iowrite8(ap
->ctl
, ap
->ioaddr
.ctl_addr
);
4170 * ata_dev_same_device - Determine whether new ID matches configured device
4171 * @dev: device to compare against
4172 * @new_class: class of the new device
4173 * @new_id: IDENTIFY page of the new device
4175 * Compare @new_class and @new_id against @dev and determine
4176 * whether @dev is the device indicated by @new_class and
4183 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4185 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
4188 const u16
*old_id
= dev
->id
;
4189 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
4190 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
4192 if (dev
->class != new_class
) {
4193 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
4194 dev
->class, new_class
);
4198 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
4199 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
4200 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
4201 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
4203 if (strcmp(model
[0], model
[1])) {
4204 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
4205 "'%s' != '%s'\n", model
[0], model
[1]);
4209 if (strcmp(serial
[0], serial
[1])) {
4210 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
4211 "'%s' != '%s'\n", serial
[0], serial
[1]);
4219 * ata_dev_reread_id - Re-read IDENTIFY data
4220 * @dev: target ATA device
4221 * @readid_flags: read ID flags
4223 * Re-read IDENTIFY page and make sure @dev is still attached to
4227 * Kernel thread context (may sleep)
4230 * 0 on success, negative errno otherwise
4232 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4234 unsigned int class = dev
->class;
4235 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4239 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4243 /* is the device still there? */
4244 if (!ata_dev_same_device(dev
, class, id
))
4247 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4252 * ata_dev_revalidate - Revalidate ATA device
4253 * @dev: device to revalidate
4254 * @new_class: new class code
4255 * @readid_flags: read ID flags
4257 * Re-read IDENTIFY page, make sure @dev is still attached to the
4258 * port and reconfigure it according to the new IDENTIFY page.
4261 * Kernel thread context (may sleep)
4264 * 0 on success, negative errno otherwise
4266 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4267 unsigned int readid_flags
)
4269 u64 n_sectors
= dev
->n_sectors
;
4272 if (!ata_dev_enabled(dev
))
4275 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4276 if (ata_class_enabled(new_class
) &&
4277 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4278 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4279 dev
->class, new_class
);
4285 rc
= ata_dev_reread_id(dev
, readid_flags
);
4289 /* configure device according to the new ID */
4290 rc
= ata_dev_configure(dev
);
4294 /* verify n_sectors hasn't changed */
4295 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4296 dev
->n_sectors
!= n_sectors
) {
4297 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4299 (unsigned long long)n_sectors
,
4300 (unsigned long long)dev
->n_sectors
);
4302 /* restore original n_sectors */
4303 dev
->n_sectors
= n_sectors
;
4312 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4316 struct ata_blacklist_entry
{
4317 const char *model_num
;
4318 const char *model_rev
;
4319 unsigned long horkage
;
4322 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4323 /* Devices with DMA related problems under Linux */
4324 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4325 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4326 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4327 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4328 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4329 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4330 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4331 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4332 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4333 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4334 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4335 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4336 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4337 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4338 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4339 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4340 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4341 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4342 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4343 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4344 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4345 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4346 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4347 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4348 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4349 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4350 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4351 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4352 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4353 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4354 /* Odd clown on sil3726/4726 PMPs */
4355 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
4356 ATA_HORKAGE_SKIP_PM
},
4358 /* Weird ATAPI devices */
4359 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4361 /* Devices we expect to fail diagnostics */
4363 /* Devices where NCQ should be avoided */
4365 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4366 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4367 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4368 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4370 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4371 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4372 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4373 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4375 /* Blacklist entries taken from Silicon Image 3124/3132
4376 Windows driver .inf file - also several Linux problem reports */
4377 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4378 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4379 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4381 /* devices which puke on READ_NATIVE_MAX */
4382 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4383 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4384 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4385 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4387 /* Devices which report 1 sector over size HPA */
4388 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4389 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4390 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4392 /* Devices which get the IVB wrong */
4393 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4394 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4395 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4396 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4397 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4403 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4409 * check for trailing wildcard: *\0
4411 p
= strchr(patt
, wildchar
);
4412 if (p
&& ((*(p
+ 1)) == 0))
4423 return strncmp(patt
, name
, len
);
4426 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4428 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4429 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4430 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4432 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4433 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4435 while (ad
->model_num
) {
4436 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4437 if (ad
->model_rev
== NULL
)
4439 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4447 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4449 /* We don't support polling DMA.
4450 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4451 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4453 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4454 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4456 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4460 * ata_is_40wire - check drive side detection
4463 * Perform drive side detection decoding, allowing for device vendors
4464 * who can't follow the documentation.
4467 static int ata_is_40wire(struct ata_device
*dev
)
4469 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4470 return ata_drive_40wire_relaxed(dev
->id
);
4471 return ata_drive_40wire(dev
->id
);
4475 * ata_dev_xfermask - Compute supported xfermask of the given device
4476 * @dev: Device to compute xfermask for
4478 * Compute supported xfermask of @dev and store it in
4479 * dev->*_mask. This function is responsible for applying all
4480 * known limits including host controller limits, device
4486 static void ata_dev_xfermask(struct ata_device
*dev
)
4488 struct ata_link
*link
= dev
->link
;
4489 struct ata_port
*ap
= link
->ap
;
4490 struct ata_host
*host
= ap
->host
;
4491 unsigned long xfer_mask
;
4493 /* controller modes available */
4494 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4495 ap
->mwdma_mask
, ap
->udma_mask
);
4497 /* drive modes available */
4498 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4499 dev
->mwdma_mask
, dev
->udma_mask
);
4500 xfer_mask
&= ata_id_xfermask(dev
->id
);
4503 * CFA Advanced TrueIDE timings are not allowed on a shared
4506 if (ata_dev_pair(dev
)) {
4507 /* No PIO5 or PIO6 */
4508 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4509 /* No MWDMA3 or MWDMA 4 */
4510 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4513 if (ata_dma_blacklisted(dev
)) {
4514 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4515 ata_dev_printk(dev
, KERN_WARNING
,
4516 "device is on DMA blacklist, disabling DMA\n");
4519 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4520 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4521 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4522 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4523 "other device, disabling DMA\n");
4526 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4527 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4529 if (ap
->ops
->mode_filter
)
4530 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4532 /* Apply cable rule here. Don't apply it early because when
4533 * we handle hot plug the cable type can itself change.
4534 * Check this last so that we know if the transfer rate was
4535 * solely limited by the cable.
4536 * Unknown or 80 wire cables reported host side are checked
4537 * drive side as well. Cases where we know a 40wire cable
4538 * is used safely for 80 are not checked here.
4540 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4541 /* UDMA/44 or higher would be available */
4542 if ((ap
->cbl
== ATA_CBL_PATA40
) ||
4543 (ata_is_40wire(dev
) &&
4544 (ap
->cbl
== ATA_CBL_PATA_UNK
||
4545 ap
->cbl
== ATA_CBL_PATA80
))) {
4546 ata_dev_printk(dev
, KERN_WARNING
,
4547 "limited to UDMA/33 due to 40-wire cable\n");
4548 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4551 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4552 &dev
->mwdma_mask
, &dev
->udma_mask
);
4556 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4557 * @dev: Device to which command will be sent
4559 * Issue SET FEATURES - XFER MODE command to device @dev
4563 * PCI/etc. bus probe sem.
4566 * 0 on success, AC_ERR_* mask otherwise.
4569 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4571 struct ata_taskfile tf
;
4572 unsigned int err_mask
;
4574 /* set up set-features taskfile */
4575 DPRINTK("set features - xfer mode\n");
4577 /* Some controllers and ATAPI devices show flaky interrupt
4578 * behavior after setting xfer mode. Use polling instead.
4580 ata_tf_init(dev
, &tf
);
4581 tf
.command
= ATA_CMD_SET_FEATURES
;
4582 tf
.feature
= SETFEATURES_XFER
;
4583 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4584 tf
.protocol
= ATA_PROT_NODATA
;
4585 /* If we are using IORDY we must send the mode setting command */
4586 if (ata_pio_need_iordy(dev
))
4587 tf
.nsect
= dev
->xfer_mode
;
4588 /* If the device has IORDY and the controller does not - turn it off */
4589 else if (ata_id_has_iordy(dev
->id
))
4591 else /* In the ancient relic department - skip all of this */
4594 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4596 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4600 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4601 * @dev: Device to which command will be sent
4602 * @enable: Whether to enable or disable the feature
4603 * @feature: The sector count represents the feature to set
4605 * Issue SET FEATURES - SATA FEATURES command to device @dev
4606 * on port @ap with sector count
4609 * PCI/etc. bus probe sem.
4612 * 0 on success, AC_ERR_* mask otherwise.
4614 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4617 struct ata_taskfile tf
;
4618 unsigned int err_mask
;
4620 /* set up set-features taskfile */
4621 DPRINTK("set features - SATA features\n");
4623 ata_tf_init(dev
, &tf
);
4624 tf
.command
= ATA_CMD_SET_FEATURES
;
4625 tf
.feature
= enable
;
4626 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4627 tf
.protocol
= ATA_PROT_NODATA
;
4630 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4632 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4637 * ata_dev_init_params - Issue INIT DEV PARAMS command
4638 * @dev: Device to which command will be sent
4639 * @heads: Number of heads (taskfile parameter)
4640 * @sectors: Number of sectors (taskfile parameter)
4643 * Kernel thread context (may sleep)
4646 * 0 on success, AC_ERR_* mask otherwise.
4648 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4649 u16 heads
, u16 sectors
)
4651 struct ata_taskfile tf
;
4652 unsigned int err_mask
;
4654 /* Number of sectors per track 1-255. Number of heads 1-16 */
4655 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4656 return AC_ERR_INVALID
;
4658 /* set up init dev params taskfile */
4659 DPRINTK("init dev params \n");
4661 ata_tf_init(dev
, &tf
);
4662 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4663 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4664 tf
.protocol
= ATA_PROT_NODATA
;
4666 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4668 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4669 /* A clean abort indicates an original or just out of spec drive
4670 and we should continue as we issue the setup based on the
4671 drive reported working geometry */
4672 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4675 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4680 * ata_sg_clean - Unmap DMA memory associated with command
4681 * @qc: Command containing DMA memory to be released
4683 * Unmap all mapped DMA memory associated with this command.
4686 * spin_lock_irqsave(host lock)
4688 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4690 struct ata_port
*ap
= qc
->ap
;
4691 struct scatterlist
*sg
= qc
->sg
;
4692 int dir
= qc
->dma_dir
;
4694 WARN_ON(sg
== NULL
);
4696 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4699 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4701 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4706 * ata_fill_sg - Fill PCI IDE PRD table
4707 * @qc: Metadata associated with taskfile to be transferred
4709 * Fill PCI IDE PRD (scatter-gather) table with segments
4710 * associated with the current disk command.
4713 * spin_lock_irqsave(host lock)
4716 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
4718 struct ata_port
*ap
= qc
->ap
;
4719 struct scatterlist
*sg
;
4720 unsigned int si
, pi
;
4723 for_each_sg(qc
->sg
, sg
, qc
->n_elem
, si
) {
4727 /* determine if physical DMA addr spans 64K boundary.
4728 * Note h/w doesn't support 64-bit, so we unconditionally
4729 * truncate dma_addr_t to u32.
4731 addr
= (u32
) sg_dma_address(sg
);
4732 sg_len
= sg_dma_len(sg
);
4735 offset
= addr
& 0xffff;
4737 if ((offset
+ sg_len
) > 0x10000)
4738 len
= 0x10000 - offset
;
4740 ap
->prd
[pi
].addr
= cpu_to_le32(addr
);
4741 ap
->prd
[pi
].flags_len
= cpu_to_le32(len
& 0xffff);
4742 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi
, addr
, len
);
4750 ap
->prd
[pi
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4754 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4755 * @qc: Metadata associated with taskfile to be transferred
4757 * Fill PCI IDE PRD (scatter-gather) table with segments
4758 * associated with the current disk command. Perform the fill
4759 * so that we avoid writing any length 64K records for
4760 * controllers that don't follow the spec.
4763 * spin_lock_irqsave(host lock)
4766 static void ata_fill_sg_dumb(struct ata_queued_cmd
*qc
)
4768 struct ata_port
*ap
= qc
->ap
;
4769 struct scatterlist
*sg
;
4770 unsigned int si
, pi
;
4773 for_each_sg(qc
->sg
, sg
, qc
->n_elem
, si
) {
4775 u32 sg_len
, len
, blen
;
4777 /* determine if physical DMA addr spans 64K boundary.
4778 * Note h/w doesn't support 64-bit, so we unconditionally
4779 * truncate dma_addr_t to u32.
4781 addr
= (u32
) sg_dma_address(sg
);
4782 sg_len
= sg_dma_len(sg
);
4785 offset
= addr
& 0xffff;
4787 if ((offset
+ sg_len
) > 0x10000)
4788 len
= 0x10000 - offset
;
4790 blen
= len
& 0xffff;
4791 ap
->prd
[pi
].addr
= cpu_to_le32(addr
);
4793 /* Some PATA chipsets like the CS5530 can't
4794 cope with 0x0000 meaning 64K as the spec says */
4795 ap
->prd
[pi
].flags_len
= cpu_to_le32(0x8000);
4797 ap
->prd
[++pi
].addr
= cpu_to_le32(addr
+ 0x8000);
4799 ap
->prd
[pi
].flags_len
= cpu_to_le32(blen
);
4800 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi
, addr
, len
);
4808 ap
->prd
[pi
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
4812 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4813 * @qc: Metadata associated with taskfile to check
4815 * Allow low-level driver to filter ATA PACKET commands, returning
4816 * a status indicating whether or not it is OK to use DMA for the
4817 * supplied PACKET command.
4820 * spin_lock_irqsave(host lock)
4822 * RETURNS: 0 when ATAPI DMA can be used
4825 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4827 struct ata_port
*ap
= qc
->ap
;
4829 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4830 * few ATAPI devices choke on such DMA requests.
4832 if (unlikely(qc
->nbytes
& 15))
4835 if (ap
->ops
->check_atapi_dma
)
4836 return ap
->ops
->check_atapi_dma(qc
);
4842 * ata_std_qc_defer - Check whether a qc needs to be deferred
4843 * @qc: ATA command in question
4845 * Non-NCQ commands cannot run with any other command, NCQ or
4846 * not. As upper layer only knows the queue depth, we are
4847 * responsible for maintaining exclusion. This function checks
4848 * whether a new command @qc can be issued.
4851 * spin_lock_irqsave(host lock)
4854 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4856 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4858 struct ata_link
*link
= qc
->dev
->link
;
4860 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4861 if (!ata_tag_valid(link
->active_tag
))
4864 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4868 return ATA_DEFER_LINK
;
4872 * ata_qc_prep - Prepare taskfile for submission
4873 * @qc: Metadata associated with taskfile to be prepared
4875 * Prepare ATA taskfile for submission.
4878 * spin_lock_irqsave(host lock)
4880 void ata_qc_prep(struct ata_queued_cmd
*qc
)
4882 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4889 * ata_dumb_qc_prep - Prepare taskfile for submission
4890 * @qc: Metadata associated with taskfile to be prepared
4892 * Prepare ATA taskfile for submission.
4895 * spin_lock_irqsave(host lock)
4897 void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
)
4899 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4902 ata_fill_sg_dumb(qc
);
4905 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4908 * ata_sg_init - Associate command with scatter-gather table.
4909 * @qc: Command to be associated
4910 * @sg: Scatter-gather table.
4911 * @n_elem: Number of elements in s/g table.
4913 * Initialize the data-related elements of queued_cmd @qc
4914 * to point to a scatter-gather table @sg, containing @n_elem
4918 * spin_lock_irqsave(host lock)
4920 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4921 unsigned int n_elem
)
4924 qc
->n_elem
= n_elem
;
4929 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4930 * @qc: Command with scatter-gather table to be mapped.
4932 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4935 * spin_lock_irqsave(host lock)
4938 * Zero on success, negative on error.
4941 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4943 struct ata_port
*ap
= qc
->ap
;
4944 unsigned int n_elem
;
4946 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4948 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4952 DPRINTK("%d sg elements mapped\n", n_elem
);
4954 qc
->n_elem
= n_elem
;
4955 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4961 * swap_buf_le16 - swap halves of 16-bit words in place
4962 * @buf: Buffer to swap
4963 * @buf_words: Number of 16-bit words in buffer.
4965 * Swap halves of 16-bit words if needed to convert from
4966 * little-endian byte order to native cpu byte order, or
4970 * Inherited from caller.
4972 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4977 for (i
= 0; i
< buf_words
; i
++)
4978 buf
[i
] = le16_to_cpu(buf
[i
]);
4979 #endif /* __BIG_ENDIAN */
4983 * ata_data_xfer - Transfer data by PIO
4984 * @dev: device to target
4986 * @buflen: buffer length
4989 * Transfer data from/to the device data register by PIO.
4992 * Inherited from caller.
4997 unsigned int ata_data_xfer(struct ata_device
*dev
, unsigned char *buf
,
4998 unsigned int buflen
, int rw
)
5000 struct ata_port
*ap
= dev
->link
->ap
;
5001 void __iomem
*data_addr
= ap
->ioaddr
.data_addr
;
5002 unsigned int words
= buflen
>> 1;
5004 /* Transfer multiple of 2 bytes */
5006 ioread16_rep(data_addr
, buf
, words
);
5008 iowrite16_rep(data_addr
, buf
, words
);
5010 /* Transfer trailing 1 byte, if any. */
5011 if (unlikely(buflen
& 0x01)) {
5012 __le16 align_buf
[1] = { 0 };
5013 unsigned char *trailing_buf
= buf
+ buflen
- 1;
5016 align_buf
[0] = cpu_to_le16(ioread16(data_addr
));
5017 memcpy(trailing_buf
, align_buf
, 1);
5019 memcpy(align_buf
, trailing_buf
, 1);
5020 iowrite16(le16_to_cpu(align_buf
[0]), data_addr
);
5029 * ata_data_xfer_noirq - Transfer data by PIO
5030 * @dev: device to target
5032 * @buflen: buffer length
5035 * Transfer data from/to the device data register by PIO. Do the
5036 * transfer with interrupts disabled.
5039 * Inherited from caller.
5044 unsigned int ata_data_xfer_noirq(struct ata_device
*dev
, unsigned char *buf
,
5045 unsigned int buflen
, int rw
)
5047 unsigned long flags
;
5048 unsigned int consumed
;
5050 local_irq_save(flags
);
5051 consumed
= ata_data_xfer(dev
, buf
, buflen
, rw
);
5052 local_irq_restore(flags
);
5059 * ata_pio_sector - Transfer a sector of data.
5060 * @qc: Command on going
5062 * Transfer qc->sect_size bytes of data from/to the ATA device.
5065 * Inherited from caller.
5068 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
5070 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
5071 struct ata_port
*ap
= qc
->ap
;
5073 unsigned int offset
;
5076 if (qc
->curbytes
== qc
->nbytes
- qc
->sect_size
)
5077 ap
->hsm_task_state
= HSM_ST_LAST
;
5079 page
= sg_page(qc
->cursg
);
5080 offset
= qc
->cursg
->offset
+ qc
->cursg_ofs
;
5082 /* get the current page and offset */
5083 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5084 offset
%= PAGE_SIZE
;
5086 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5088 if (PageHighMem(page
)) {
5089 unsigned long flags
;
5091 /* FIXME: use a bounce buffer */
5092 local_irq_save(flags
);
5093 buf
= kmap_atomic(page
, KM_IRQ0
);
5095 /* do the actual data transfer */
5096 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5098 kunmap_atomic(buf
, KM_IRQ0
);
5099 local_irq_restore(flags
);
5101 buf
= page_address(page
);
5102 ap
->ops
->data_xfer(qc
->dev
, buf
+ offset
, qc
->sect_size
, do_write
);
5105 qc
->curbytes
+= qc
->sect_size
;
5106 qc
->cursg_ofs
+= qc
->sect_size
;
5108 if (qc
->cursg_ofs
== qc
->cursg
->length
) {
5109 qc
->cursg
= sg_next(qc
->cursg
);
5115 * ata_pio_sectors - Transfer one or many sectors.
5116 * @qc: Command on going
5118 * Transfer one or many sectors of data from/to the
5119 * ATA device for the DRQ request.
5122 * Inherited from caller.
5125 static void ata_pio_sectors(struct ata_queued_cmd
*qc
)
5127 if (is_multi_taskfile(&qc
->tf
)) {
5128 /* READ/WRITE MULTIPLE */
5131 WARN_ON(qc
->dev
->multi_count
== 0);
5133 nsect
= min((qc
->nbytes
- qc
->curbytes
) / qc
->sect_size
,
5134 qc
->dev
->multi_count
);
5140 ata_altstatus(qc
->ap
); /* flush */
5144 * atapi_send_cdb - Write CDB bytes to hardware
5145 * @ap: Port to which ATAPI device is attached.
5146 * @qc: Taskfile currently active
5148 * When device has indicated its readiness to accept
5149 * a CDB, this function is called. Send the CDB.
5155 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5158 DPRINTK("send cdb\n");
5159 WARN_ON(qc
->dev
->cdb_len
< 12);
5161 ap
->ops
->data_xfer(qc
->dev
, qc
->cdb
, qc
->dev
->cdb_len
, 1);
5162 ata_altstatus(ap
); /* flush */
5164 switch (qc
->tf
.protocol
) {
5165 case ATAPI_PROT_PIO
:
5166 ap
->hsm_task_state
= HSM_ST
;
5168 case ATAPI_PROT_NODATA
:
5169 ap
->hsm_task_state
= HSM_ST_LAST
;
5171 case ATAPI_PROT_DMA
:
5172 ap
->hsm_task_state
= HSM_ST_LAST
;
5173 /* initiate bmdma */
5174 ap
->ops
->bmdma_start(qc
);
5180 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5181 * @qc: Command on going
5182 * @bytes: number of bytes
5184 * Transfer Transfer data from/to the ATAPI device.
5187 * Inherited from caller.
5190 static int __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
5192 int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? WRITE
: READ
;
5193 struct ata_port
*ap
= qc
->ap
;
5194 struct ata_device
*dev
= qc
->dev
;
5195 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5196 struct scatterlist
*sg
;
5199 unsigned int offset
, count
, consumed
;
5203 if (unlikely(!sg
)) {
5204 ata_ehi_push_desc(ehi
, "unexpected or too much trailing data "
5205 "buf=%u cur=%u bytes=%u",
5206 qc
->nbytes
, qc
->curbytes
, bytes
);
5211 offset
= sg
->offset
+ qc
->cursg_ofs
;
5213 /* get the current page and offset */
5214 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
5215 offset
%= PAGE_SIZE
;
5217 /* don't overrun current sg */
5218 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
5220 /* don't cross page boundaries */
5221 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
5223 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
5225 if (PageHighMem(page
)) {
5226 unsigned long flags
;
5228 /* FIXME: use bounce buffer */
5229 local_irq_save(flags
);
5230 buf
= kmap_atomic(page
, KM_IRQ0
);
5232 /* do the actual data transfer */
5233 consumed
= ap
->ops
->data_xfer(dev
, buf
+ offset
, count
, rw
);
5235 kunmap_atomic(buf
, KM_IRQ0
);
5236 local_irq_restore(flags
);
5238 buf
= page_address(page
);
5239 consumed
= ap
->ops
->data_xfer(dev
, buf
+ offset
, count
, rw
);
5242 bytes
-= min(bytes
, consumed
);
5243 qc
->curbytes
+= count
;
5244 qc
->cursg_ofs
+= count
;
5246 if (qc
->cursg_ofs
== sg
->length
) {
5247 qc
->cursg
= sg_next(qc
->cursg
);
5251 /* consumed can be larger than count only for the last transfer */
5252 WARN_ON(qc
->cursg
&& count
!= consumed
);
5260 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5261 * @qc: Command on going
5263 * Transfer Transfer data from/to the ATAPI device.
5266 * Inherited from caller.
5269 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
5271 struct ata_port
*ap
= qc
->ap
;
5272 struct ata_device
*dev
= qc
->dev
;
5273 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5274 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
5275 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
5277 /* Abuse qc->result_tf for temp storage of intermediate TF
5278 * here to save some kernel stack usage.
5279 * For normal completion, qc->result_tf is not relevant. For
5280 * error, qc->result_tf is later overwritten by ata_qc_complete().
5281 * So, the correctness of qc->result_tf is not affected.
5283 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5284 ireason
= qc
->result_tf
.nsect
;
5285 bc_lo
= qc
->result_tf
.lbam
;
5286 bc_hi
= qc
->result_tf
.lbah
;
5287 bytes
= (bc_hi
<< 8) | bc_lo
;
5289 /* shall be cleared to zero, indicating xfer of data */
5290 if (unlikely(ireason
& (1 << 0)))
5293 /* make sure transfer direction matches expected */
5294 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
5295 if (unlikely(do_write
!= i_write
))
5298 if (unlikely(!bytes
))
5301 VPRINTK("ata%u: xfering %d bytes\n", ap
->print_id
, bytes
);
5303 if (unlikely(__atapi_pio_bytes(qc
, bytes
)))
5305 ata_altstatus(ap
); /* flush */
5310 ata_ehi_push_desc(ehi
, "ATAPI check failed (ireason=0x%x bytes=%u)",
5313 qc
->err_mask
|= AC_ERR_HSM
;
5314 ap
->hsm_task_state
= HSM_ST_ERR
;
5318 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5319 * @ap: the target ata_port
5323 * 1 if ok in workqueue, 0 otherwise.
5326 static inline int ata_hsm_ok_in_wq(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
5328 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
5331 if (ap
->hsm_task_state
== HSM_ST_FIRST
) {
5332 if (qc
->tf
.protocol
== ATA_PROT_PIO
&&
5333 (qc
->tf
.flags
& ATA_TFLAG_WRITE
))
5336 if (ata_is_atapi(qc
->tf
.protocol
) &&
5337 !(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
5345 * ata_hsm_qc_complete - finish a qc running on standard HSM
5346 * @qc: Command to complete
5347 * @in_wq: 1 if called from workqueue, 0 otherwise
5349 * Finish @qc which is running on standard HSM.
5352 * If @in_wq is zero, spin_lock_irqsave(host lock).
5353 * Otherwise, none on entry and grabs host lock.
5355 static void ata_hsm_qc_complete(struct ata_queued_cmd
*qc
, int in_wq
)
5357 struct ata_port
*ap
= qc
->ap
;
5358 unsigned long flags
;
5360 if (ap
->ops
->error_handler
) {
5362 spin_lock_irqsave(ap
->lock
, flags
);
5364 /* EH might have kicked in while host lock is
5367 qc
= ata_qc_from_tag(ap
, qc
->tag
);
5369 if (likely(!(qc
->err_mask
& AC_ERR_HSM
))) {
5370 ap
->ops
->irq_on(ap
);
5371 ata_qc_complete(qc
);
5373 ata_port_freeze(ap
);
5376 spin_unlock_irqrestore(ap
->lock
, flags
);
5378 if (likely(!(qc
->err_mask
& AC_ERR_HSM
)))
5379 ata_qc_complete(qc
);
5381 ata_port_freeze(ap
);
5385 spin_lock_irqsave(ap
->lock
, flags
);
5386 ap
->ops
->irq_on(ap
);
5387 ata_qc_complete(qc
);
5388 spin_unlock_irqrestore(ap
->lock
, flags
);
5390 ata_qc_complete(qc
);
5395 * ata_hsm_move - move the HSM to the next state.
5396 * @ap: the target ata_port
5398 * @status: current device status
5399 * @in_wq: 1 if called from workqueue, 0 otherwise
5402 * 1 when poll next status needed, 0 otherwise.
5404 int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
5405 u8 status
, int in_wq
)
5407 unsigned long flags
= 0;
5410 WARN_ON((qc
->flags
& ATA_QCFLAG_ACTIVE
) == 0);
5412 /* Make sure ata_qc_issue_prot() does not throw things
5413 * like DMA polling into the workqueue. Notice that
5414 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5416 WARN_ON(in_wq
!= ata_hsm_ok_in_wq(ap
, qc
));
5419 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5420 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
5422 switch (ap
->hsm_task_state
) {
5424 /* Send first data block or PACKET CDB */
5426 /* If polling, we will stay in the work queue after
5427 * sending the data. Otherwise, interrupt handler
5428 * takes over after sending the data.
5430 poll_next
= (qc
->tf
.flags
& ATA_TFLAG_POLLING
);
5432 /* check device status */
5433 if (unlikely((status
& ATA_DRQ
) == 0)) {
5434 /* handle BSY=0, DRQ=0 as error */
5435 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5436 /* device stops HSM for abort/error */
5437 qc
->err_mask
|= AC_ERR_DEV
;
5439 /* HSM violation. Let EH handle this */
5440 qc
->err_mask
|= AC_ERR_HSM
;
5442 ap
->hsm_task_state
= HSM_ST_ERR
;
5446 /* Device should not ask for data transfer (DRQ=1)
5447 * when it finds something wrong.
5448 * We ignore DRQ here and stop the HSM by
5449 * changing hsm_task_state to HSM_ST_ERR and
5450 * let the EH abort the command or reset the device.
5452 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5453 /* Some ATAPI tape drives forget to clear the ERR bit
5454 * when doing the next command (mostly request sense).
5455 * We ignore ERR here to workaround and proceed sending
5458 if (!(qc
->dev
->horkage
& ATA_HORKAGE_STUCK_ERR
)) {
5459 ata_port_printk(ap
, KERN_WARNING
,
5460 "DRQ=1 with device error, "
5461 "dev_stat 0x%X\n", status
);
5462 qc
->err_mask
|= AC_ERR_HSM
;
5463 ap
->hsm_task_state
= HSM_ST_ERR
;
5468 /* Send the CDB (atapi) or the first data block (ata pio out).
5469 * During the state transition, interrupt handler shouldn't
5470 * be invoked before the data transfer is complete and
5471 * hsm_task_state is changed. Hence, the following locking.
5474 spin_lock_irqsave(ap
->lock
, flags
);
5476 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
5477 /* PIO data out protocol.
5478 * send first data block.
5481 /* ata_pio_sectors() might change the state
5482 * to HSM_ST_LAST. so, the state is changed here
5483 * before ata_pio_sectors().
5485 ap
->hsm_task_state
= HSM_ST
;
5486 ata_pio_sectors(qc
);
5489 atapi_send_cdb(ap
, qc
);
5492 spin_unlock_irqrestore(ap
->lock
, flags
);
5494 /* if polling, ata_pio_task() handles the rest.
5495 * otherwise, interrupt handler takes over from here.
5500 /* complete command or read/write the data register */
5501 if (qc
->tf
.protocol
== ATAPI_PROT_PIO
) {
5502 /* ATAPI PIO protocol */
5503 if ((status
& ATA_DRQ
) == 0) {
5504 /* No more data to transfer or device error.
5505 * Device error will be tagged in HSM_ST_LAST.
5507 ap
->hsm_task_state
= HSM_ST_LAST
;
5511 /* Device should not ask for data transfer (DRQ=1)
5512 * when it finds something wrong.
5513 * We ignore DRQ here and stop the HSM by
5514 * changing hsm_task_state to HSM_ST_ERR and
5515 * let the EH abort the command or reset the device.
5517 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5518 ata_port_printk(ap
, KERN_WARNING
, "DRQ=1 with "
5519 "device error, dev_stat 0x%X\n",
5521 qc
->err_mask
|= AC_ERR_HSM
;
5522 ap
->hsm_task_state
= HSM_ST_ERR
;
5526 atapi_pio_bytes(qc
);
5528 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
5529 /* bad ireason reported by device */
5533 /* ATA PIO protocol */
5534 if (unlikely((status
& ATA_DRQ
) == 0)) {
5535 /* handle BSY=0, DRQ=0 as error */
5536 if (likely(status
& (ATA_ERR
| ATA_DF
)))
5537 /* device stops HSM for abort/error */
5538 qc
->err_mask
|= AC_ERR_DEV
;
5540 /* HSM violation. Let EH handle this.
5541 * Phantom devices also trigger this
5542 * condition. Mark hint.
5544 qc
->err_mask
|= AC_ERR_HSM
|
5547 ap
->hsm_task_state
= HSM_ST_ERR
;
5551 /* For PIO reads, some devices may ask for
5552 * data transfer (DRQ=1) alone with ERR=1.
5553 * We respect DRQ here and transfer one
5554 * block of junk data before changing the
5555 * hsm_task_state to HSM_ST_ERR.
5557 * For PIO writes, ERR=1 DRQ=1 doesn't make
5558 * sense since the data block has been
5559 * transferred to the device.
5561 if (unlikely(status
& (ATA_ERR
| ATA_DF
))) {
5562 /* data might be corrputed */
5563 qc
->err_mask
|= AC_ERR_DEV
;
5565 if (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
)) {
5566 ata_pio_sectors(qc
);
5567 status
= ata_wait_idle(ap
);
5570 if (status
& (ATA_BUSY
| ATA_DRQ
))
5571 qc
->err_mask
|= AC_ERR_HSM
;
5573 /* ata_pio_sectors() might change the
5574 * state to HSM_ST_LAST. so, the state
5575 * is changed after ata_pio_sectors().
5577 ap
->hsm_task_state
= HSM_ST_ERR
;
5581 ata_pio_sectors(qc
);
5583 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
5584 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
5586 status
= ata_wait_idle(ap
);
5595 if (unlikely(!ata_ok(status
))) {
5596 qc
->err_mask
|= __ac_err_mask(status
);
5597 ap
->hsm_task_state
= HSM_ST_ERR
;
5601 /* no more data to transfer */
5602 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5603 ap
->print_id
, qc
->dev
->devno
, status
);
5605 WARN_ON(qc
->err_mask
);
5607 ap
->hsm_task_state
= HSM_ST_IDLE
;
5609 /* complete taskfile transaction */
5610 ata_hsm_qc_complete(qc
, in_wq
);
5616 /* make sure qc->err_mask is available to
5617 * know what's wrong and recover
5619 WARN_ON(qc
->err_mask
== 0);
5621 ap
->hsm_task_state
= HSM_ST_IDLE
;
5623 /* complete taskfile transaction */
5624 ata_hsm_qc_complete(qc
, in_wq
);
5636 static void ata_pio_task(struct work_struct
*work
)
5638 struct ata_port
*ap
=
5639 container_of(work
, struct ata_port
, port_task
.work
);
5640 struct ata_queued_cmd
*qc
= ap
->port_task_data
;
5645 WARN_ON(ap
->hsm_task_state
== HSM_ST_IDLE
);
5648 * This is purely heuristic. This is a fast path.
5649 * Sometimes when we enter, BSY will be cleared in
5650 * a chk-status or two. If not, the drive is probably seeking
5651 * or something. Snooze for a couple msecs, then
5652 * chk-status again. If still busy, queue delayed work.
5654 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
5655 if (status
& ATA_BUSY
) {
5657 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
5658 if (status
& ATA_BUSY
) {
5659 ata_pio_queue_task(ap
, qc
, ATA_SHORT_PAUSE
);
5665 poll_next
= ata_hsm_move(ap
, qc
, status
, 1);
5667 /* another command or interrupt handler
5668 * may be running at this point.
5675 * ata_qc_new - Request an available ATA command, for queueing
5676 * @ap: Port associated with device @dev
5677 * @dev: Device from whom we request an available command structure
5683 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
5685 struct ata_queued_cmd
*qc
= NULL
;
5688 /* no command while frozen */
5689 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
5692 /* the last tag is reserved for internal command. */
5693 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
5694 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
5695 qc
= __ata_qc_from_tag(ap
, i
);
5706 * ata_qc_new_init - Request an available ATA command, and initialize it
5707 * @dev: Device from whom we request an available command structure
5713 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
5715 struct ata_port
*ap
= dev
->link
->ap
;
5716 struct ata_queued_cmd
*qc
;
5718 qc
= ata_qc_new(ap
);
5731 * ata_qc_free - free unused ata_queued_cmd
5732 * @qc: Command to complete
5734 * Designed to free unused ata_queued_cmd object
5735 * in case something prevents using it.
5738 * spin_lock_irqsave(host lock)
5740 void ata_qc_free(struct ata_queued_cmd
*qc
)
5742 struct ata_port
*ap
= qc
->ap
;
5745 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5749 if (likely(ata_tag_valid(tag
))) {
5750 qc
->tag
= ATA_TAG_POISON
;
5751 clear_bit(tag
, &ap
->qc_allocated
);
5755 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
5757 struct ata_port
*ap
= qc
->ap
;
5758 struct ata_link
*link
= qc
->dev
->link
;
5760 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
5761 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
5763 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
5766 /* command should be marked inactive atomically with qc completion */
5767 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
5768 link
->sactive
&= ~(1 << qc
->tag
);
5770 ap
->nr_active_links
--;
5772 link
->active_tag
= ATA_TAG_POISON
;
5773 ap
->nr_active_links
--;
5776 /* clear exclusive status */
5777 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
5778 ap
->excl_link
== link
))
5779 ap
->excl_link
= NULL
;
5781 /* atapi: mark qc as inactive to prevent the interrupt handler
5782 * from completing the command twice later, before the error handler
5783 * is called. (when rc != 0 and atapi request sense is needed)
5785 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
5786 ap
->qc_active
&= ~(1 << qc
->tag
);
5788 /* call completion callback */
5789 qc
->complete_fn(qc
);
5792 static void fill_result_tf(struct ata_queued_cmd
*qc
)
5794 struct ata_port
*ap
= qc
->ap
;
5796 qc
->result_tf
.flags
= qc
->tf
.flags
;
5797 ap
->ops
->tf_read(ap
, &qc
->result_tf
);
5800 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
5802 struct ata_device
*dev
= qc
->dev
;
5804 if (ata_tag_internal(qc
->tag
))
5807 if (ata_is_nodata(qc
->tf
.protocol
))
5810 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
5813 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
5817 * ata_qc_complete - Complete an active ATA command
5818 * @qc: Command to complete
5819 * @err_mask: ATA Status register contents
5821 * Indicate to the mid and upper layers that an ATA
5822 * command has completed, with either an ok or not-ok status.
5825 * spin_lock_irqsave(host lock)
5827 void ata_qc_complete(struct ata_queued_cmd
*qc
)
5829 struct ata_port
*ap
= qc
->ap
;
5831 /* XXX: New EH and old EH use different mechanisms to
5832 * synchronize EH with regular execution path.
5834 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5835 * Normal execution path is responsible for not accessing a
5836 * failed qc. libata core enforces the rule by returning NULL
5837 * from ata_qc_from_tag() for failed qcs.
5839 * Old EH depends on ata_qc_complete() nullifying completion
5840 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5841 * not synchronize with interrupt handler. Only PIO task is
5844 if (ap
->ops
->error_handler
) {
5845 struct ata_device
*dev
= qc
->dev
;
5846 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
5848 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
5850 if (unlikely(qc
->err_mask
))
5851 qc
->flags
|= ATA_QCFLAG_FAILED
;
5853 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
5854 if (!ata_tag_internal(qc
->tag
)) {
5855 /* always fill result TF for failed qc */
5857 ata_qc_schedule_eh(qc
);
5862 /* read result TF if requested */
5863 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5866 /* Some commands need post-processing after successful
5869 switch (qc
->tf
.command
) {
5870 case ATA_CMD_SET_FEATURES
:
5871 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
5872 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5875 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5876 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5877 /* revalidate device */
5878 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5879 ata_port_schedule_eh(ap
);
5883 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5887 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
5888 ata_verify_xfer(qc
);
5890 __ata_qc_complete(qc
);
5892 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5895 /* read result TF if failed or requested */
5896 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5899 __ata_qc_complete(qc
);
5904 * ata_qc_complete_multiple - Complete multiple qcs successfully
5905 * @ap: port in question
5906 * @qc_active: new qc_active mask
5907 * @finish_qc: LLDD callback invoked before completing a qc
5909 * Complete in-flight commands. This functions is meant to be
5910 * called from low-level driver's interrupt routine to complete
5911 * requests normally. ap->qc_active and @qc_active is compared
5912 * and commands are completed accordingly.
5915 * spin_lock_irqsave(host lock)
5918 * Number of completed commands on success, -errno otherwise.
5920 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
5921 void (*finish_qc
)(struct ata_queued_cmd
*))
5927 done_mask
= ap
->qc_active
^ qc_active
;
5929 if (unlikely(done_mask
& qc_active
)) {
5930 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5931 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5935 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5936 struct ata_queued_cmd
*qc
;
5938 if (!(done_mask
& (1 << i
)))
5941 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5944 ata_qc_complete(qc
);
5953 * ata_qc_issue - issue taskfile to device
5954 * @qc: command to issue to device
5956 * Prepare an ATA command to submission to device.
5957 * This includes mapping the data into a DMA-able
5958 * area, filling in the S/G table, and finally
5959 * writing the taskfile to hardware, starting the command.
5962 * spin_lock_irqsave(host lock)
5964 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5966 struct ata_port
*ap
= qc
->ap
;
5967 struct ata_link
*link
= qc
->dev
->link
;
5968 u8 prot
= qc
->tf
.protocol
;
5970 /* Make sure only one non-NCQ command is outstanding. The
5971 * check is skipped for old EH because it reuses active qc to
5972 * request ATAPI sense.
5974 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5976 if (ata_is_ncq(prot
)) {
5977 WARN_ON(link
->sactive
& (1 << qc
->tag
));
5980 ap
->nr_active_links
++;
5981 link
->sactive
|= 1 << qc
->tag
;
5983 WARN_ON(link
->sactive
);
5985 ap
->nr_active_links
++;
5986 link
->active_tag
= qc
->tag
;
5989 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5990 ap
->qc_active
|= 1 << qc
->tag
;
5992 /* We guarantee to LLDs that they will have at least one
5993 * non-zero sg if the command is a data command.
5995 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
5997 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5998 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
5999 if (ata_sg_setup(qc
))
6002 /* if device is sleeping, schedule softreset and abort the link */
6003 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
6004 link
->eh_info
.action
|= ATA_EH_SOFTRESET
;
6005 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
6006 ata_link_abort(link
);
6010 ap
->ops
->qc_prep(qc
);
6012 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
6013 if (unlikely(qc
->err_mask
))
6018 qc
->err_mask
|= AC_ERR_SYSTEM
;
6020 ata_qc_complete(qc
);
6024 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6025 * @qc: command to issue to device
6027 * Using various libata functions and hooks, this function
6028 * starts an ATA command. ATA commands are grouped into
6029 * classes called "protocols", and issuing each type of protocol
6030 * is slightly different.
6032 * May be used as the qc_issue() entry in ata_port_operations.
6035 * spin_lock_irqsave(host lock)
6038 * Zero on success, AC_ERR_* mask on failure
6041 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
6043 struct ata_port
*ap
= qc
->ap
;
6045 /* Use polling pio if the LLD doesn't handle
6046 * interrupt driven pio and atapi CDB interrupt.
6048 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
6049 switch (qc
->tf
.protocol
) {
6051 case ATA_PROT_NODATA
:
6052 case ATAPI_PROT_PIO
:
6053 case ATAPI_PROT_NODATA
:
6054 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
6056 case ATAPI_PROT_DMA
:
6057 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
6058 /* see ata_dma_blacklisted() */
6066 /* select the device */
6067 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
6069 /* start the command */
6070 switch (qc
->tf
.protocol
) {
6071 case ATA_PROT_NODATA
:
6072 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6073 ata_qc_set_polling(qc
);
6075 ata_tf_to_host(ap
, &qc
->tf
);
6076 ap
->hsm_task_state
= HSM_ST_LAST
;
6078 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6079 ata_pio_queue_task(ap
, qc
, 0);
6084 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6086 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6087 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6088 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
6089 ap
->hsm_task_state
= HSM_ST_LAST
;
6093 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6094 ata_qc_set_polling(qc
);
6096 ata_tf_to_host(ap
, &qc
->tf
);
6098 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
6099 /* PIO data out protocol */
6100 ap
->hsm_task_state
= HSM_ST_FIRST
;
6101 ata_pio_queue_task(ap
, qc
, 0);
6103 /* always send first data block using
6104 * the ata_pio_task() codepath.
6107 /* PIO data in protocol */
6108 ap
->hsm_task_state
= HSM_ST
;
6110 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6111 ata_pio_queue_task(ap
, qc
, 0);
6113 /* if polling, ata_pio_task() handles the rest.
6114 * otherwise, interrupt handler takes over from here.
6120 case ATAPI_PROT_PIO
:
6121 case ATAPI_PROT_NODATA
:
6122 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
6123 ata_qc_set_polling(qc
);
6125 ata_tf_to_host(ap
, &qc
->tf
);
6127 ap
->hsm_task_state
= HSM_ST_FIRST
;
6129 /* send cdb by polling if no cdb interrupt */
6130 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
6131 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
6132 ata_pio_queue_task(ap
, qc
, 0);
6135 case ATAPI_PROT_DMA
:
6136 WARN_ON(qc
->tf
.flags
& ATA_TFLAG_POLLING
);
6138 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
6139 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
6140 ap
->hsm_task_state
= HSM_ST_FIRST
;
6142 /* send cdb by polling if no cdb interrupt */
6143 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6144 ata_pio_queue_task(ap
, qc
, 0);
6149 return AC_ERR_SYSTEM
;
6156 * ata_host_intr - Handle host interrupt for given (port, task)
6157 * @ap: Port on which interrupt arrived (possibly...)
6158 * @qc: Taskfile currently active in engine
6160 * Handle host interrupt for given queued command. Currently,
6161 * only DMA interrupts are handled. All other commands are
6162 * handled via polling with interrupts disabled (nIEN bit).
6165 * spin_lock_irqsave(host lock)
6168 * One if interrupt was handled, zero if not (shared irq).
6171 inline unsigned int ata_host_intr(struct ata_port
*ap
,
6172 struct ata_queued_cmd
*qc
)
6174 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6175 u8 status
, host_stat
= 0;
6177 VPRINTK("ata%u: protocol %d task_state %d\n",
6178 ap
->print_id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
6180 /* Check whether we are expecting interrupt in this state */
6181 switch (ap
->hsm_task_state
) {
6183 /* Some pre-ATAPI-4 devices assert INTRQ
6184 * at this state when ready to receive CDB.
6187 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6188 * The flag was turned on only for atapi devices. No
6189 * need to check ata_is_atapi(qc->tf.protocol) again.
6191 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
6195 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
6196 qc
->tf
.protocol
== ATAPI_PROT_DMA
) {
6197 /* check status of DMA engine */
6198 host_stat
= ap
->ops
->bmdma_status(ap
);
6199 VPRINTK("ata%u: host_stat 0x%X\n",
6200 ap
->print_id
, host_stat
);
6202 /* if it's not our irq... */
6203 if (!(host_stat
& ATA_DMA_INTR
))
6206 /* before we do anything else, clear DMA-Start bit */
6207 ap
->ops
->bmdma_stop(qc
);
6209 if (unlikely(host_stat
& ATA_DMA_ERR
)) {
6210 /* error when transfering data to/from memory */
6211 qc
->err_mask
|= AC_ERR_HOST_BUS
;
6212 ap
->hsm_task_state
= HSM_ST_ERR
;
6222 /* check altstatus */
6223 status
= ata_altstatus(ap
);
6224 if (status
& ATA_BUSY
)
6227 /* check main status, clearing INTRQ */
6228 status
= ata_chk_status(ap
);
6229 if (unlikely(status
& ATA_BUSY
))
6232 /* ack bmdma irq events */
6233 ap
->ops
->irq_clear(ap
);
6235 ata_hsm_move(ap
, qc
, status
, 0);
6237 if (unlikely(qc
->err_mask
) && (qc
->tf
.protocol
== ATA_PROT_DMA
||
6238 qc
->tf
.protocol
== ATAPI_PROT_DMA
))
6239 ata_ehi_push_desc(ehi
, "BMDMA stat 0x%x", host_stat
);
6241 return 1; /* irq handled */
6244 ap
->stats
.idle_irq
++;
6247 if ((ap
->stats
.idle_irq
% 1000) == 0) {
6249 ap
->ops
->irq_clear(ap
);
6250 ata_port_printk(ap
, KERN_WARNING
, "irq trap\n");
6254 return 0; /* irq not handled */
6258 * ata_interrupt - Default ATA host interrupt handler
6259 * @irq: irq line (unused)
6260 * @dev_instance: pointer to our ata_host information structure
6262 * Default interrupt handler for PCI IDE devices. Calls
6263 * ata_host_intr() for each port that is not disabled.
6266 * Obtains host lock during operation.
6269 * IRQ_NONE or IRQ_HANDLED.
6272 irqreturn_t
ata_interrupt(int irq
, void *dev_instance
)
6274 struct ata_host
*host
= dev_instance
;
6276 unsigned int handled
= 0;
6277 unsigned long flags
;
6279 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6280 spin_lock_irqsave(&host
->lock
, flags
);
6282 for (i
= 0; i
< host
->n_ports
; i
++) {
6283 struct ata_port
*ap
;
6285 ap
= host
->ports
[i
];
6287 !(ap
->flags
& ATA_FLAG_DISABLED
)) {
6288 struct ata_queued_cmd
*qc
;
6290 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
6291 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
6292 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
6293 handled
|= ata_host_intr(ap
, qc
);
6297 spin_unlock_irqrestore(&host
->lock
, flags
);
6299 return IRQ_RETVAL(handled
);
6303 * sata_scr_valid - test whether SCRs are accessible
6304 * @link: ATA link to test SCR accessibility for
6306 * Test whether SCRs are accessible for @link.
6312 * 1 if SCRs are accessible, 0 otherwise.
6314 int sata_scr_valid(struct ata_link
*link
)
6316 struct ata_port
*ap
= link
->ap
;
6318 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
6322 * sata_scr_read - read SCR register of the specified port
6323 * @link: ATA link to read SCR for
6325 * @val: Place to store read value
6327 * Read SCR register @reg of @link into *@val. This function is
6328 * guaranteed to succeed if @link is ap->link, the cable type of
6329 * the port is SATA and the port implements ->scr_read.
6332 * None if @link is ap->link. Kernel thread context otherwise.
6335 * 0 on success, negative errno on failure.
6337 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
6339 if (ata_is_host_link(link
)) {
6340 struct ata_port
*ap
= link
->ap
;
6342 if (sata_scr_valid(link
))
6343 return ap
->ops
->scr_read(ap
, reg
, val
);
6347 return sata_pmp_scr_read(link
, reg
, val
);
6351 * sata_scr_write - write SCR register of the specified port
6352 * @link: ATA link to write SCR for
6353 * @reg: SCR to write
6354 * @val: value to write
6356 * Write @val to SCR register @reg of @link. This function is
6357 * guaranteed to succeed if @link is ap->link, the cable type of
6358 * the port is SATA and the port implements ->scr_read.
6361 * None if @link is ap->link. Kernel thread context otherwise.
6364 * 0 on success, negative errno on failure.
6366 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
6368 if (ata_is_host_link(link
)) {
6369 struct ata_port
*ap
= link
->ap
;
6371 if (sata_scr_valid(link
))
6372 return ap
->ops
->scr_write(ap
, reg
, val
);
6376 return sata_pmp_scr_write(link
, reg
, val
);
6380 * sata_scr_write_flush - write SCR register of the specified port and flush
6381 * @link: ATA link to write SCR for
6382 * @reg: SCR to write
6383 * @val: value to write
6385 * This function is identical to sata_scr_write() except that this
6386 * function performs flush after writing to the register.
6389 * None if @link is ap->link. Kernel thread context otherwise.
6392 * 0 on success, negative errno on failure.
6394 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
6396 if (ata_is_host_link(link
)) {
6397 struct ata_port
*ap
= link
->ap
;
6400 if (sata_scr_valid(link
)) {
6401 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
6403 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
6409 return sata_pmp_scr_write(link
, reg
, val
);
6413 * ata_link_online - test whether the given link is online
6414 * @link: ATA link to test
6416 * Test whether @link is online. Note that this function returns
6417 * 0 if online status of @link cannot be obtained, so
6418 * ata_link_online(link) != !ata_link_offline(link).
6424 * 1 if the port online status is available and online.
6426 int ata_link_online(struct ata_link
*link
)
6430 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6431 (sstatus
& 0xf) == 0x3)
6437 * ata_link_offline - test whether the given link is offline
6438 * @link: ATA link to test
6440 * Test whether @link is offline. Note that this function
6441 * returns 0 if offline status of @link cannot be obtained, so
6442 * ata_link_online(link) != !ata_link_offline(link).
6448 * 1 if the port offline status is available and offline.
6450 int ata_link_offline(struct ata_link
*link
)
6454 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
6455 (sstatus
& 0xf) != 0x3)
6460 int ata_flush_cache(struct ata_device
*dev
)
6462 unsigned int err_mask
;
6465 if (!ata_try_flush_cache(dev
))
6468 if (dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
6469 cmd
= ATA_CMD_FLUSH_EXT
;
6471 cmd
= ATA_CMD_FLUSH
;
6473 /* This is wrong. On a failed flush we get back the LBA of the lost
6474 sector and we should (assuming it wasn't aborted as unknown) issue
6475 a further flush command to continue the writeback until it
6477 err_mask
= ata_do_simple_cmd(dev
, cmd
);
6479 ata_dev_printk(dev
, KERN_ERR
, "failed to flush cache\n");
6487 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
6488 unsigned int action
, unsigned int ehi_flags
,
6491 unsigned long flags
;
6494 for (i
= 0; i
< host
->n_ports
; i
++) {
6495 struct ata_port
*ap
= host
->ports
[i
];
6496 struct ata_link
*link
;
6498 /* Previous resume operation might still be in
6499 * progress. Wait for PM_PENDING to clear.
6501 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
6502 ata_port_wait_eh(ap
);
6503 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6506 /* request PM ops to EH */
6507 spin_lock_irqsave(ap
->lock
, flags
);
6512 ap
->pm_result
= &rc
;
6515 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
6516 __ata_port_for_each_link(link
, ap
) {
6517 link
->eh_info
.action
|= action
;
6518 link
->eh_info
.flags
|= ehi_flags
;
6521 ata_port_schedule_eh(ap
);
6523 spin_unlock_irqrestore(ap
->lock
, flags
);
6525 /* wait and check result */
6527 ata_port_wait_eh(ap
);
6528 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
6538 * ata_host_suspend - suspend host
6539 * @host: host to suspend
6542 * Suspend @host. Actual operation is performed by EH. This
6543 * function requests EH to perform PM operations and waits for EH
6547 * Kernel thread context (may sleep).
6550 * 0 on success, -errno on failure.
6552 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
6557 * disable link pm on all ports before requesting
6560 ata_lpm_enable(host
);
6562 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
6564 host
->dev
->power
.power_state
= mesg
;
6569 * ata_host_resume - resume host
6570 * @host: host to resume
6572 * Resume @host. Actual operation is performed by EH. This
6573 * function requests EH to perform PM operations and returns.
6574 * Note that all resume operations are performed parallely.
6577 * Kernel thread context (may sleep).
6579 void ata_host_resume(struct ata_host
*host
)
6581 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_SOFTRESET
,
6582 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
6583 host
->dev
->power
.power_state
= PMSG_ON
;
6585 /* reenable link pm */
6586 ata_lpm_disable(host
);
6591 * ata_port_start - Set port up for dma.
6592 * @ap: Port to initialize
6594 * Called just after data structures for each port are
6595 * initialized. Allocates space for PRD table.
6597 * May be used as the port_start() entry in ata_port_operations.
6600 * Inherited from caller.
6602 int ata_port_start(struct ata_port
*ap
)
6604 struct device
*dev
= ap
->dev
;
6606 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
6615 * ata_dev_init - Initialize an ata_device structure
6616 * @dev: Device structure to initialize
6618 * Initialize @dev in preparation for probing.
6621 * Inherited from caller.
6623 void ata_dev_init(struct ata_device
*dev
)
6625 struct ata_link
*link
= dev
->link
;
6626 struct ata_port
*ap
= link
->ap
;
6627 unsigned long flags
;
6629 /* SATA spd limit is bound to the first device */
6630 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6633 /* High bits of dev->flags are used to record warm plug
6634 * requests which occur asynchronously. Synchronize using
6637 spin_lock_irqsave(ap
->lock
, flags
);
6638 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
6640 spin_unlock_irqrestore(ap
->lock
, flags
);
6642 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
6643 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
6644 dev
->pio_mask
= UINT_MAX
;
6645 dev
->mwdma_mask
= UINT_MAX
;
6646 dev
->udma_mask
= UINT_MAX
;
6650 * ata_link_init - Initialize an ata_link structure
6651 * @ap: ATA port link is attached to
6652 * @link: Link structure to initialize
6653 * @pmp: Port multiplier port number
6658 * Kernel thread context (may sleep)
6660 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
6664 /* clear everything except for devices */
6665 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
6669 link
->active_tag
= ATA_TAG_POISON
;
6670 link
->hw_sata_spd_limit
= UINT_MAX
;
6672 /* can't use iterator, ap isn't initialized yet */
6673 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
6674 struct ata_device
*dev
= &link
->device
[i
];
6677 dev
->devno
= dev
- link
->device
;
6683 * sata_link_init_spd - Initialize link->sata_spd_limit
6684 * @link: Link to configure sata_spd_limit for
6686 * Initialize @link->[hw_]sata_spd_limit to the currently
6690 * Kernel thread context (may sleep).
6693 * 0 on success, -errno on failure.
6695 int sata_link_init_spd(struct ata_link
*link
)
6701 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
6705 spd
= (scontrol
>> 4) & 0xf;
6707 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
6709 ata_force_spd_limit(link
);
6711 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
6717 * ata_port_alloc - allocate and initialize basic ATA port resources
6718 * @host: ATA host this allocated port belongs to
6720 * Allocate and initialize basic ATA port resources.
6723 * Allocate ATA port on success, NULL on failure.
6726 * Inherited from calling layer (may sleep).
6728 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
6730 struct ata_port
*ap
;
6734 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
6738 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
6739 ap
->lock
= &host
->lock
;
6740 ap
->flags
= ATA_FLAG_DISABLED
;
6742 ap
->ctl
= ATA_DEVCTL_OBS
;
6744 ap
->dev
= host
->dev
;
6745 ap
->last_ctl
= 0xFF;
6747 #if defined(ATA_VERBOSE_DEBUG)
6748 /* turn on all debugging levels */
6749 ap
->msg_enable
= 0x00FF;
6750 #elif defined(ATA_DEBUG)
6751 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
6753 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
6756 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
6757 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
6758 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
6759 INIT_LIST_HEAD(&ap
->eh_done_q
);
6760 init_waitqueue_head(&ap
->eh_wait_q
);
6761 init_timer_deferrable(&ap
->fastdrain_timer
);
6762 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
6763 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
6765 ap
->cbl
= ATA_CBL_NONE
;
6767 ata_link_init(ap
, &ap
->link
, 0);
6770 ap
->stats
.unhandled_irq
= 1;
6771 ap
->stats
.idle_irq
= 1;
6776 static void ata_host_release(struct device
*gendev
, void *res
)
6778 struct ata_host
*host
= dev_get_drvdata(gendev
);
6781 for (i
= 0; i
< host
->n_ports
; i
++) {
6782 struct ata_port
*ap
= host
->ports
[i
];
6788 scsi_host_put(ap
->scsi_host
);
6790 kfree(ap
->pmp_link
);
6792 host
->ports
[i
] = NULL
;
6795 dev_set_drvdata(gendev
, NULL
);
6799 * ata_host_alloc - allocate and init basic ATA host resources
6800 * @dev: generic device this host is associated with
6801 * @max_ports: maximum number of ATA ports associated with this host
6803 * Allocate and initialize basic ATA host resources. LLD calls
6804 * this function to allocate a host, initializes it fully and
6805 * attaches it using ata_host_register().
6807 * @max_ports ports are allocated and host->n_ports is
6808 * initialized to @max_ports. The caller is allowed to decrease
6809 * host->n_ports before calling ata_host_register(). The unused
6810 * ports will be automatically freed on registration.
6813 * Allocate ATA host on success, NULL on failure.
6816 * Inherited from calling layer (may sleep).
6818 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
6820 struct ata_host
*host
;
6826 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
6829 /* alloc a container for our list of ATA ports (buses) */
6830 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
6831 /* alloc a container for our list of ATA ports (buses) */
6832 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
6836 devres_add(dev
, host
);
6837 dev_set_drvdata(dev
, host
);
6839 spin_lock_init(&host
->lock
);
6841 host
->n_ports
= max_ports
;
6843 /* allocate ports bound to this host */
6844 for (i
= 0; i
< max_ports
; i
++) {
6845 struct ata_port
*ap
;
6847 ap
= ata_port_alloc(host
);
6852 host
->ports
[i
] = ap
;
6855 devres_remove_group(dev
, NULL
);
6859 devres_release_group(dev
, NULL
);
6864 * ata_host_alloc_pinfo - alloc host and init with port_info array
6865 * @dev: generic device this host is associated with
6866 * @ppi: array of ATA port_info to initialize host with
6867 * @n_ports: number of ATA ports attached to this host
6869 * Allocate ATA host and initialize with info from @ppi. If NULL
6870 * terminated, @ppi may contain fewer entries than @n_ports. The
6871 * last entry will be used for the remaining ports.
6874 * Allocate ATA host on success, NULL on failure.
6877 * Inherited from calling layer (may sleep).
6879 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
6880 const struct ata_port_info
* const * ppi
,
6883 const struct ata_port_info
*pi
;
6884 struct ata_host
*host
;
6887 host
= ata_host_alloc(dev
, n_ports
);
6891 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
6892 struct ata_port
*ap
= host
->ports
[i
];
6897 ap
->pio_mask
= pi
->pio_mask
;
6898 ap
->mwdma_mask
= pi
->mwdma_mask
;
6899 ap
->udma_mask
= pi
->udma_mask
;
6900 ap
->flags
|= pi
->flags
;
6901 ap
->link
.flags
|= pi
->link_flags
;
6902 ap
->ops
= pi
->port_ops
;
6904 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
6905 host
->ops
= pi
->port_ops
;
6906 if (!host
->private_data
&& pi
->private_data
)
6907 host
->private_data
= pi
->private_data
;
6913 static void ata_host_stop(struct device
*gendev
, void *res
)
6915 struct ata_host
*host
= dev_get_drvdata(gendev
);
6918 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
6920 for (i
= 0; i
< host
->n_ports
; i
++) {
6921 struct ata_port
*ap
= host
->ports
[i
];
6923 if (ap
->ops
->port_stop
)
6924 ap
->ops
->port_stop(ap
);
6927 if (host
->ops
->host_stop
)
6928 host
->ops
->host_stop(host
);
6932 * ata_host_start - start and freeze ports of an ATA host
6933 * @host: ATA host to start ports for
6935 * Start and then freeze ports of @host. Started status is
6936 * recorded in host->flags, so this function can be called
6937 * multiple times. Ports are guaranteed to get started only
6938 * once. If host->ops isn't initialized yet, its set to the
6939 * first non-dummy port ops.
6942 * Inherited from calling layer (may sleep).
6945 * 0 if all ports are started successfully, -errno otherwise.
6947 int ata_host_start(struct ata_host
*host
)
6950 void *start_dr
= NULL
;
6953 if (host
->flags
& ATA_HOST_STARTED
)
6956 for (i
= 0; i
< host
->n_ports
; i
++) {
6957 struct ata_port
*ap
= host
->ports
[i
];
6959 if (!host
->ops
&& !ata_port_is_dummy(ap
))
6960 host
->ops
= ap
->ops
;
6962 if (ap
->ops
->port_stop
)
6966 if (host
->ops
->host_stop
)
6970 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
6975 for (i
= 0; i
< host
->n_ports
; i
++) {
6976 struct ata_port
*ap
= host
->ports
[i
];
6978 if (ap
->ops
->port_start
) {
6979 rc
= ap
->ops
->port_start(ap
);
6982 dev_printk(KERN_ERR
, host
->dev
,
6983 "failed to start port %d "
6984 "(errno=%d)\n", i
, rc
);
6988 ata_eh_freeze_port(ap
);
6992 devres_add(host
->dev
, start_dr
);
6993 host
->flags
|= ATA_HOST_STARTED
;
6998 struct ata_port
*ap
= host
->ports
[i
];
7000 if (ap
->ops
->port_stop
)
7001 ap
->ops
->port_stop(ap
);
7003 devres_free(start_dr
);
7008 * ata_sas_host_init - Initialize a host struct
7009 * @host: host to initialize
7010 * @dev: device host is attached to
7011 * @flags: host flags
7015 * PCI/etc. bus probe sem.
7018 /* KILLME - the only user left is ipr */
7019 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
7020 unsigned long flags
, const struct ata_port_operations
*ops
)
7022 spin_lock_init(&host
->lock
);
7024 host
->flags
= flags
;
7029 * ata_host_register - register initialized ATA host
7030 * @host: ATA host to register
7031 * @sht: template for SCSI host
7033 * Register initialized ATA host. @host is allocated using
7034 * ata_host_alloc() and fully initialized by LLD. This function
7035 * starts ports, registers @host with ATA and SCSI layers and
7036 * probe registered devices.
7039 * Inherited from calling layer (may sleep).
7042 * 0 on success, -errno otherwise.
7044 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
7048 /* host must have been started */
7049 if (!(host
->flags
& ATA_HOST_STARTED
)) {
7050 dev_printk(KERN_ERR
, host
->dev
,
7051 "BUG: trying to register unstarted host\n");
7056 /* Blow away unused ports. This happens when LLD can't
7057 * determine the exact number of ports to allocate at
7060 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
7061 kfree(host
->ports
[i
]);
7063 /* give ports names and add SCSI hosts */
7064 for (i
= 0; i
< host
->n_ports
; i
++)
7065 host
->ports
[i
]->print_id
= ata_print_id
++;
7067 rc
= ata_scsi_add_hosts(host
, sht
);
7071 /* associate with ACPI nodes */
7072 ata_acpi_associate(host
);
7074 /* set cable, sata_spd_limit and report */
7075 for (i
= 0; i
< host
->n_ports
; i
++) {
7076 struct ata_port
*ap
= host
->ports
[i
];
7077 unsigned long xfer_mask
;
7079 /* set SATA cable type if still unset */
7080 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
7081 ap
->cbl
= ATA_CBL_SATA
;
7083 /* init sata_spd_limit to the current value */
7084 sata_link_init_spd(&ap
->link
);
7086 /* print per-port info to dmesg */
7087 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
7090 if (!ata_port_is_dummy(ap
)) {
7091 ata_port_printk(ap
, KERN_INFO
,
7092 "%cATA max %s %s\n",
7093 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
7094 ata_mode_string(xfer_mask
),
7095 ap
->link
.eh_info
.desc
);
7096 ata_ehi_clear_desc(&ap
->link
.eh_info
);
7098 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
7101 /* perform each probe synchronously */
7102 DPRINTK("probe begin\n");
7103 for (i
= 0; i
< host
->n_ports
; i
++) {
7104 struct ata_port
*ap
= host
->ports
[i
];
7107 if (ap
->ops
->error_handler
) {
7108 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
7109 unsigned long flags
;
7113 /* kick EH for boot probing */
7114 spin_lock_irqsave(ap
->lock
, flags
);
7117 (1 << ata_link_max_devices(&ap
->link
)) - 1;
7118 ehi
->action
|= ATA_EH_SOFTRESET
;
7119 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
7121 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
7122 ap
->pflags
|= ATA_PFLAG_LOADING
;
7123 ata_port_schedule_eh(ap
);
7125 spin_unlock_irqrestore(ap
->lock
, flags
);
7127 /* wait for EH to finish */
7128 ata_port_wait_eh(ap
);
7130 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
7131 rc
= ata_bus_probe(ap
);
7132 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
7135 /* FIXME: do something useful here?
7136 * Current libata behavior will
7137 * tear down everything when
7138 * the module is removed
7139 * or the h/w is unplugged.
7145 /* probes are done, now scan each port's disk(s) */
7146 DPRINTK("host probe begin\n");
7147 for (i
= 0; i
< host
->n_ports
; i
++) {
7148 struct ata_port
*ap
= host
->ports
[i
];
7150 ata_scsi_scan_host(ap
, 1);
7151 ata_lpm_schedule(ap
, ap
->pm_policy
);
7158 * ata_host_activate - start host, request IRQ and register it
7159 * @host: target ATA host
7160 * @irq: IRQ to request
7161 * @irq_handler: irq_handler used when requesting IRQ
7162 * @irq_flags: irq_flags used when requesting IRQ
7163 * @sht: scsi_host_template to use when registering the host
7165 * After allocating an ATA host and initializing it, most libata
7166 * LLDs perform three steps to activate the host - start host,
7167 * request IRQ and register it. This helper takes necessasry
7168 * arguments and performs the three steps in one go.
7170 * An invalid IRQ skips the IRQ registration and expects the host to
7171 * have set polling mode on the port. In this case, @irq_handler
7175 * Inherited from calling layer (may sleep).
7178 * 0 on success, -errno otherwise.
7180 int ata_host_activate(struct ata_host
*host
, int irq
,
7181 irq_handler_t irq_handler
, unsigned long irq_flags
,
7182 struct scsi_host_template
*sht
)
7186 rc
= ata_host_start(host
);
7190 /* Special case for polling mode */
7192 WARN_ON(irq_handler
);
7193 return ata_host_register(host
, sht
);
7196 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
7197 dev_driver_string(host
->dev
), host
);
7201 for (i
= 0; i
< host
->n_ports
; i
++)
7202 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
7204 rc
= ata_host_register(host
, sht
);
7205 /* if failed, just free the IRQ and leave ports alone */
7207 devm_free_irq(host
->dev
, irq
, host
);
7213 * ata_port_detach - Detach ATA port in prepration of device removal
7214 * @ap: ATA port to be detached
7216 * Detach all ATA devices and the associated SCSI devices of @ap;
7217 * then, remove the associated SCSI host. @ap is guaranteed to
7218 * be quiescent on return from this function.
7221 * Kernel thread context (may sleep).
7223 static void ata_port_detach(struct ata_port
*ap
)
7225 unsigned long flags
;
7226 struct ata_link
*link
;
7227 struct ata_device
*dev
;
7229 if (!ap
->ops
->error_handler
)
7232 /* tell EH we're leaving & flush EH */
7233 spin_lock_irqsave(ap
->lock
, flags
);
7234 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
7235 spin_unlock_irqrestore(ap
->lock
, flags
);
7237 ata_port_wait_eh(ap
);
7239 /* EH is now guaranteed to see UNLOADING - EH context belongs
7240 * to us. Disable all existing devices.
7242 ata_port_for_each_link(link
, ap
) {
7243 ata_link_for_each_dev(dev
, link
)
7244 ata_dev_disable(dev
);
7247 /* Final freeze & EH. All in-flight commands are aborted. EH
7248 * will be skipped and retrials will be terminated with bad
7251 spin_lock_irqsave(ap
->lock
, flags
);
7252 ata_port_freeze(ap
); /* won't be thawed */
7253 spin_unlock_irqrestore(ap
->lock
, flags
);
7255 ata_port_wait_eh(ap
);
7256 cancel_rearming_delayed_work(&ap
->hotplug_task
);
7259 /* remove the associated SCSI host */
7260 scsi_remove_host(ap
->scsi_host
);
7264 * ata_host_detach - Detach all ports of an ATA host
7265 * @host: Host to detach
7267 * Detach all ports of @host.
7270 * Kernel thread context (may sleep).
7272 void ata_host_detach(struct ata_host
*host
)
7276 for (i
= 0; i
< host
->n_ports
; i
++)
7277 ata_port_detach(host
->ports
[i
]);
7279 /* the host is dead now, dissociate ACPI */
7280 ata_acpi_dissociate(host
);
7284 * ata_std_ports - initialize ioaddr with standard port offsets.
7285 * @ioaddr: IO address structure to be initialized
7287 * Utility function which initializes data_addr, error_addr,
7288 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7289 * device_addr, status_addr, and command_addr to standard offsets
7290 * relative to cmd_addr.
7292 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7295 void ata_std_ports(struct ata_ioports
*ioaddr
)
7297 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
7298 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
7299 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
7300 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
7301 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
7302 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
7303 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
7304 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
7305 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
7306 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
7313 * ata_pci_remove_one - PCI layer callback for device removal
7314 * @pdev: PCI device that was removed
7316 * PCI layer indicates to libata via this hook that hot-unplug or
7317 * module unload event has occurred. Detach all ports. Resource
7318 * release is handled via devres.
7321 * Inherited from PCI layer (may sleep).
7323 void ata_pci_remove_one(struct pci_dev
*pdev
)
7325 struct device
*dev
= &pdev
->dev
;
7326 struct ata_host
*host
= dev_get_drvdata(dev
);
7328 ata_host_detach(host
);
7331 /* move to PCI subsystem */
7332 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
7334 unsigned long tmp
= 0;
7336 switch (bits
->width
) {
7339 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
7345 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
7351 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
7362 return (tmp
== bits
->val
) ? 1 : 0;
7366 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7368 pci_save_state(pdev
);
7369 pci_disable_device(pdev
);
7371 if (mesg
.event
& PM_EVENT_SLEEP
)
7372 pci_set_power_state(pdev
, PCI_D3hot
);
7375 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
7379 pci_set_power_state(pdev
, PCI_D0
);
7380 pci_restore_state(pdev
);
7382 rc
= pcim_enable_device(pdev
);
7384 dev_printk(KERN_ERR
, &pdev
->dev
,
7385 "failed to enable device after resume (%d)\n", rc
);
7389 pci_set_master(pdev
);
7393 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
7395 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7398 rc
= ata_host_suspend(host
, mesg
);
7402 ata_pci_device_do_suspend(pdev
, mesg
);
7407 int ata_pci_device_resume(struct pci_dev
*pdev
)
7409 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
7412 rc
= ata_pci_device_do_resume(pdev
);
7414 ata_host_resume(host
);
7417 #endif /* CONFIG_PM */
7419 #endif /* CONFIG_PCI */
7421 static int __init
ata_parse_force_one(char **cur
,
7422 struct ata_force_ent
*force_ent
,
7423 const char **reason
)
7425 /* FIXME: Currently, there's no way to tag init const data and
7426 * using __initdata causes build failure on some versions of
7427 * gcc. Once __initdataconst is implemented, add const to the
7428 * following structure.
7430 static struct ata_force_param force_tbl
[] __initdata
= {
7431 { "40c", .cbl
= ATA_CBL_PATA40
},
7432 { "80c", .cbl
= ATA_CBL_PATA80
},
7433 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
7434 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
7435 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
7436 { "sata", .cbl
= ATA_CBL_SATA
},
7437 { "1.5Gbps", .spd_limit
= 1 },
7438 { "3.0Gbps", .spd_limit
= 2 },
7439 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
7440 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
7441 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
7442 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
7443 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
7444 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
7445 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
7446 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
7447 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
7448 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
7449 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
7450 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
7451 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
7452 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
7453 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
7454 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
7455 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
7456 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
7457 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
7458 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
7459 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
7460 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
7461 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
7462 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
7463 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
7464 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
7465 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
7466 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
7467 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
7468 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
7469 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
7470 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
7471 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
7472 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
7473 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
7474 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
7476 char *start
= *cur
, *p
= *cur
;
7477 char *id
, *val
, *endp
;
7478 const struct ata_force_param
*match_fp
= NULL
;
7479 int nr_matches
= 0, i
;
7481 /* find where this param ends and update *cur */
7482 while (*p
!= '\0' && *p
!= ',')
7493 p
= strchr(start
, ':');
7495 val
= strstrip(start
);
7500 id
= strstrip(start
);
7501 val
= strstrip(p
+ 1);
7504 p
= strchr(id
, '.');
7507 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
7508 if (p
== endp
|| *endp
!= '\0') {
7509 *reason
= "invalid device";
7514 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
7515 if (p
== endp
|| *endp
!= '\0') {
7516 *reason
= "invalid port/link";
7521 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
7522 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
7523 const struct ata_force_param
*fp
= &force_tbl
[i
];
7525 if (strncasecmp(val
, fp
->name
, strlen(val
)))
7531 if (strcasecmp(val
, fp
->name
) == 0) {
7538 *reason
= "unknown value";
7541 if (nr_matches
> 1) {
7542 *reason
= "ambigious value";
7546 force_ent
->param
= *match_fp
;
7551 static void __init
ata_parse_force_param(void)
7553 int idx
= 0, size
= 1;
7554 int last_port
= -1, last_device
= -1;
7555 char *p
, *cur
, *next
;
7557 /* calculate maximum number of params and allocate force_tbl */
7558 for (p
= ata_force_param_buf
; *p
; p
++)
7562 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
7563 if (!ata_force_tbl
) {
7564 printk(KERN_WARNING
"ata: failed to extend force table, "
7565 "libata.force ignored\n");
7569 /* parse and populate the table */
7570 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
7571 const char *reason
= "";
7572 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
7575 if (ata_parse_force_one(&next
, &te
, &reason
)) {
7576 printk(KERN_WARNING
"ata: failed to parse force "
7577 "parameter \"%s\" (%s)\n",
7582 if (te
.port
== -1) {
7583 te
.port
= last_port
;
7584 te
.device
= last_device
;
7587 ata_force_tbl
[idx
++] = te
;
7589 last_port
= te
.port
;
7590 last_device
= te
.device
;
7593 ata_force_tbl_size
= idx
;
7596 static int __init
ata_init(void)
7598 ata_probe_timeout
*= HZ
;
7600 ata_parse_force_param();
7602 ata_wq
= create_workqueue("ata");
7606 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
7608 destroy_workqueue(ata_wq
);
7612 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
7616 static void __exit
ata_exit(void)
7618 kfree(ata_force_tbl
);
7619 destroy_workqueue(ata_wq
);
7620 destroy_workqueue(ata_aux_wq
);
7623 subsys_initcall(ata_init
);
7624 module_exit(ata_exit
);
7626 static unsigned long ratelimit_time
;
7627 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
7629 int ata_ratelimit(void)
7632 unsigned long flags
;
7634 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
7636 if (time_after(jiffies
, ratelimit_time
)) {
7638 ratelimit_time
= jiffies
+ (HZ
/5);
7642 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
7648 * ata_wait_register - wait until register value changes
7649 * @reg: IO-mapped register
7650 * @mask: Mask to apply to read register value
7651 * @val: Wait condition
7652 * @interval_msec: polling interval in milliseconds
7653 * @timeout_msec: timeout in milliseconds
7655 * Waiting for some bits of register to change is a common
7656 * operation for ATA controllers. This function reads 32bit LE
7657 * IO-mapped register @reg and tests for the following condition.
7659 * (*@reg & mask) != val
7661 * If the condition is met, it returns; otherwise, the process is
7662 * repeated after @interval_msec until timeout.
7665 * Kernel thread context (may sleep)
7668 * The final register value.
7670 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
7671 unsigned long interval_msec
,
7672 unsigned long timeout_msec
)
7674 unsigned long timeout
;
7677 tmp
= ioread32(reg
);
7679 /* Calculate timeout _after_ the first read to make sure
7680 * preceding writes reach the controller before starting to
7681 * eat away the timeout.
7683 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
7685 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
7686 msleep(interval_msec
);
7687 tmp
= ioread32(reg
);
7696 static void ata_dummy_noret(struct ata_port
*ap
) { }
7697 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
7698 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
7700 static u8
ata_dummy_check_status(struct ata_port
*ap
)
7705 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
7707 return AC_ERR_SYSTEM
;
7710 const struct ata_port_operations ata_dummy_port_ops
= {
7711 .check_status
= ata_dummy_check_status
,
7712 .check_altstatus
= ata_dummy_check_status
,
7713 .dev_select
= ata_noop_dev_select
,
7714 .qc_prep
= ata_noop_qc_prep
,
7715 .qc_issue
= ata_dummy_qc_issue
,
7716 .freeze
= ata_dummy_noret
,
7717 .thaw
= ata_dummy_noret
,
7718 .error_handler
= ata_dummy_noret
,
7719 .post_internal_cmd
= ata_dummy_qc_noret
,
7720 .irq_clear
= ata_dummy_noret
,
7721 .port_start
= ata_dummy_ret0
,
7722 .port_stop
= ata_dummy_noret
,
7725 const struct ata_port_info ata_dummy_port_info
= {
7726 .port_ops
= &ata_dummy_port_ops
,
7730 * libata is essentially a library of internal helper functions for
7731 * low-level ATA host controller drivers. As such, the API/ABI is
7732 * likely to change as new drivers are added and updated.
7733 * Do not depend on ABI/API stability.
7735 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
7736 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
7737 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
7738 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
7739 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
7740 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
7741 EXPORT_SYMBOL_GPL(ata_std_ports
);
7742 EXPORT_SYMBOL_GPL(ata_host_init
);
7743 EXPORT_SYMBOL_GPL(ata_host_alloc
);
7744 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
7745 EXPORT_SYMBOL_GPL(ata_host_start
);
7746 EXPORT_SYMBOL_GPL(ata_host_register
);
7747 EXPORT_SYMBOL_GPL(ata_host_activate
);
7748 EXPORT_SYMBOL_GPL(ata_host_detach
);
7749 EXPORT_SYMBOL_GPL(ata_sg_init
);
7750 EXPORT_SYMBOL_GPL(ata_hsm_move
);
7751 EXPORT_SYMBOL_GPL(ata_qc_complete
);
7752 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
7753 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
7754 EXPORT_SYMBOL_GPL(ata_tf_load
);
7755 EXPORT_SYMBOL_GPL(ata_tf_read
);
7756 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
7757 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
7758 EXPORT_SYMBOL_GPL(sata_print_link_status
);
7759 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
7760 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
7761 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
7762 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
7763 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
7764 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
7765 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
7766 EXPORT_SYMBOL_GPL(ata_mode_string
);
7767 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
7768 EXPORT_SYMBOL_GPL(ata_check_status
);
7769 EXPORT_SYMBOL_GPL(ata_altstatus
);
7770 EXPORT_SYMBOL_GPL(ata_exec_command
);
7771 EXPORT_SYMBOL_GPL(ata_port_start
);
7772 EXPORT_SYMBOL_GPL(ata_sff_port_start
);
7773 EXPORT_SYMBOL_GPL(ata_interrupt
);
7774 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
7775 EXPORT_SYMBOL_GPL(ata_data_xfer
);
7776 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq
);
7777 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
7778 EXPORT_SYMBOL_GPL(ata_qc_prep
);
7779 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep
);
7780 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
7781 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
7782 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
7783 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
7784 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
7785 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
7786 EXPORT_SYMBOL_GPL(ata_bmdma_freeze
);
7787 EXPORT_SYMBOL_GPL(ata_bmdma_thaw
);
7788 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh
);
7789 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler
);
7790 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd
);
7791 EXPORT_SYMBOL_GPL(ata_port_probe
);
7792 EXPORT_SYMBOL_GPL(ata_dev_disable
);
7793 EXPORT_SYMBOL_GPL(sata_set_spd
);
7794 EXPORT_SYMBOL_GPL(sata_link_debounce
);
7795 EXPORT_SYMBOL_GPL(sata_link_resume
);
7796 EXPORT_SYMBOL_GPL(ata_bus_reset
);
7797 EXPORT_SYMBOL_GPL(ata_std_prereset
);
7798 EXPORT_SYMBOL_GPL(ata_std_softreset
);
7799 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
7800 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
7801 EXPORT_SYMBOL_GPL(ata_std_postreset
);
7802 EXPORT_SYMBOL_GPL(ata_dev_classify
);
7803 EXPORT_SYMBOL_GPL(ata_dev_pair
);
7804 EXPORT_SYMBOL_GPL(ata_port_disable
);
7805 EXPORT_SYMBOL_GPL(ata_ratelimit
);
7806 EXPORT_SYMBOL_GPL(ata_wait_register
);
7807 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
7808 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
7809 EXPORT_SYMBOL_GPL(ata_wait_ready
);
7810 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
7811 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
7812 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
7813 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
7814 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
7815 EXPORT_SYMBOL_GPL(ata_host_intr
);
7816 EXPORT_SYMBOL_GPL(sata_scr_valid
);
7817 EXPORT_SYMBOL_GPL(sata_scr_read
);
7818 EXPORT_SYMBOL_GPL(sata_scr_write
);
7819 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
7820 EXPORT_SYMBOL_GPL(ata_link_online
);
7821 EXPORT_SYMBOL_GPL(ata_link_offline
);
7823 EXPORT_SYMBOL_GPL(ata_host_suspend
);
7824 EXPORT_SYMBOL_GPL(ata_host_resume
);
7825 #endif /* CONFIG_PM */
7826 EXPORT_SYMBOL_GPL(ata_id_string
);
7827 EXPORT_SYMBOL_GPL(ata_id_c_string
);
7828 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
7830 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
7831 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
7832 EXPORT_SYMBOL_GPL(ata_timing_compute
);
7833 EXPORT_SYMBOL_GPL(ata_timing_merge
);
7834 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
7837 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
7838 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host
);
7839 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma
);
7840 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host
);
7841 EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host
);
7842 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
7843 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
7845 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
7846 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
7847 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
7848 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
7849 #endif /* CONFIG_PM */
7850 EXPORT_SYMBOL_GPL(ata_pci_default_filter
);
7851 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex
);
7852 #endif /* CONFIG_PCI */
7854 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
7855 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset
);
7856 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset
);
7857 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset
);
7858 EXPORT_SYMBOL_GPL(sata_pmp_do_eh
);
7860 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
7861 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
7862 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
7863 EXPORT_SYMBOL_GPL(ata_port_desc
);
7865 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
7866 #endif /* CONFIG_PCI */
7867 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
7868 EXPORT_SYMBOL_GPL(ata_link_abort
);
7869 EXPORT_SYMBOL_GPL(ata_port_abort
);
7870 EXPORT_SYMBOL_GPL(ata_port_freeze
);
7871 EXPORT_SYMBOL_GPL(sata_async_notification
);
7872 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
7873 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
7874 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
7875 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
7876 EXPORT_SYMBOL_GPL(ata_do_eh
);
7877 EXPORT_SYMBOL_GPL(ata_irq_on
);
7878 EXPORT_SYMBOL_GPL(ata_dev_try_classify
);
7880 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
7881 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
7882 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
7883 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
7884 EXPORT_SYMBOL_GPL(ata_cable_sata
);