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/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <scsi/scsi.h>
60 #include <scsi/scsi_cmnd.h>
61 #include <scsi/scsi_host.h>
62 #include <linux/libata.h>
63 #include <asm/byteorder.h>
64 #include <linux/cdrom.h>
69 /* debounce timing parameters in msecs { interval, duration, timeout } */
70 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
71 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
72 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
74 const struct ata_port_operations ata_base_port_ops
= {
75 .prereset
= ata_std_prereset
,
76 .postreset
= ata_std_postreset
,
77 .error_handler
= ata_std_error_handler
,
80 const struct ata_port_operations sata_port_ops
= {
81 .inherits
= &ata_base_port_ops
,
83 .qc_defer
= ata_std_qc_defer
,
84 .hardreset
= sata_std_hardreset
,
87 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
88 u16 heads
, u16 sectors
);
89 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
90 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
91 u8 enable
, u8 feature
);
92 static void ata_dev_xfermask(struct ata_device
*dev
);
93 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
95 unsigned int ata_print_id
= 1;
96 static struct workqueue_struct
*ata_wq
;
98 struct workqueue_struct
*ata_aux_wq
;
100 struct ata_force_param
{
104 unsigned long xfer_mask
;
105 unsigned int horkage_on
;
106 unsigned int horkage_off
;
109 struct ata_force_ent
{
112 struct ata_force_param param
;
115 static struct ata_force_ent
*ata_force_tbl
;
116 static int ata_force_tbl_size
;
118 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
119 /* param_buf is thrown away after initialization, disallow read */
120 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
121 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
123 static int atapi_enabled
= 1;
124 module_param(atapi_enabled
, int, 0444);
125 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
127 static int atapi_dmadir
= 0;
128 module_param(atapi_dmadir
, int, 0444);
129 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
131 int atapi_passthru16
= 1;
132 module_param(atapi_passthru16
, int, 0444);
133 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
136 module_param_named(fua
, libata_fua
, int, 0444);
137 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
139 static int ata_ignore_hpa
;
140 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
141 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
143 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
144 module_param_named(dma
, libata_dma_mask
, int, 0444);
145 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
147 static int ata_probe_timeout
;
148 module_param(ata_probe_timeout
, int, 0444);
149 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
151 int libata_noacpi
= 0;
152 module_param_named(noacpi
, libata_noacpi
, int, 0444);
153 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
155 int libata_allow_tpm
= 0;
156 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
157 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
159 MODULE_AUTHOR("Jeff Garzik");
160 MODULE_DESCRIPTION("Library module for ATA devices");
161 MODULE_LICENSE("GPL");
162 MODULE_VERSION(DRV_VERSION
);
166 * ata_force_cbl - force cable type according to libata.force
167 * @ap: ATA port of interest
169 * Force cable type according to libata.force and whine about it.
170 * The last entry which has matching port number is used, so it
171 * can be specified as part of device force parameters. For
172 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
178 void ata_force_cbl(struct ata_port
*ap
)
182 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
183 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
185 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
188 if (fe
->param
.cbl
== ATA_CBL_NONE
)
191 ap
->cbl
= fe
->param
.cbl
;
192 ata_port_printk(ap
, KERN_NOTICE
,
193 "FORCE: cable set to %s\n", fe
->param
.name
);
199 * ata_force_spd_limit - force SATA spd limit according to libata.force
200 * @link: ATA link of interest
202 * Force SATA spd limit according to libata.force and whine about
203 * it. When only the port part is specified (e.g. 1:), the limit
204 * applies to all links connected to both the host link and all
205 * fan-out ports connected via PMP. If the device part is
206 * specified as 0 (e.g. 1.00:), it specifies the first fan-out
207 * link not the host link. Device number 15 always points to the
208 * host link whether PMP is attached or not.
213 static void ata_force_spd_limit(struct ata_link
*link
)
217 if (ata_is_host_link(link
))
222 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
223 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
225 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
228 if (fe
->device
!= -1 && fe
->device
!= linkno
)
231 if (!fe
->param
.spd_limit
)
234 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
235 ata_link_printk(link
, KERN_NOTICE
,
236 "FORCE: PHY spd limit set to %s\n", fe
->param
.name
);
242 * ata_force_xfermask - force xfermask according to libata.force
243 * @dev: ATA device of interest
245 * Force xfer_mask according to libata.force and whine about it.
246 * For consistency with link selection, device number 15 selects
247 * the first device connected to the host link.
252 static void ata_force_xfermask(struct ata_device
*dev
)
254 int devno
= dev
->link
->pmp
+ dev
->devno
;
255 int alt_devno
= devno
;
258 /* allow n.15 for the first device attached to host port */
259 if (ata_is_host_link(dev
->link
) && devno
== 0)
262 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
263 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
264 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
266 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
269 if (fe
->device
!= -1 && fe
->device
!= devno
&&
270 fe
->device
!= alt_devno
)
273 if (!fe
->param
.xfer_mask
)
276 ata_unpack_xfermask(fe
->param
.xfer_mask
,
277 &pio_mask
, &mwdma_mask
, &udma_mask
);
279 dev
->udma_mask
= udma_mask
;
280 else if (mwdma_mask
) {
282 dev
->mwdma_mask
= mwdma_mask
;
286 dev
->pio_mask
= pio_mask
;
289 ata_dev_printk(dev
, KERN_NOTICE
,
290 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
296 * ata_force_horkage - force horkage according to libata.force
297 * @dev: ATA device of interest
299 * Force horkage according to libata.force and whine about it.
300 * For consistency with link selection, device number 15 selects
301 * the first device connected to the host link.
306 static void ata_force_horkage(struct ata_device
*dev
)
308 int devno
= dev
->link
->pmp
+ dev
->devno
;
309 int alt_devno
= devno
;
312 /* allow n.15 for the first device attached to host port */
313 if (ata_is_host_link(dev
->link
) && devno
== 0)
316 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
317 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
319 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
322 if (fe
->device
!= -1 && fe
->device
!= devno
&&
323 fe
->device
!= alt_devno
)
326 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
327 !(dev
->horkage
& fe
->param
.horkage_off
))
330 dev
->horkage
|= fe
->param
.horkage_on
;
331 dev
->horkage
&= ~fe
->param
.horkage_off
;
333 ata_dev_printk(dev
, KERN_NOTICE
,
334 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
339 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
340 * @opcode: SCSI opcode
342 * Determine ATAPI command type from @opcode.
348 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
350 int atapi_cmd_type(u8 opcode
)
359 case GPCMD_WRITE_AND_VERIFY_10
:
363 case GPCMD_READ_CD_MSF
:
364 return ATAPI_READ_CD
;
368 if (atapi_passthru16
)
369 return ATAPI_PASS_THRU
;
377 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
378 * @tf: Taskfile to convert
379 * @pmp: Port multiplier port
380 * @is_cmd: This FIS is for command
381 * @fis: Buffer into which data will output
383 * Converts a standard ATA taskfile to a Serial ATA
384 * FIS structure (Register - Host to Device).
387 * Inherited from caller.
389 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
391 fis
[0] = 0x27; /* Register - Host to Device FIS */
392 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
394 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
396 fis
[2] = tf
->command
;
397 fis
[3] = tf
->feature
;
404 fis
[8] = tf
->hob_lbal
;
405 fis
[9] = tf
->hob_lbam
;
406 fis
[10] = tf
->hob_lbah
;
407 fis
[11] = tf
->hob_feature
;
410 fis
[13] = tf
->hob_nsect
;
421 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
422 * @fis: Buffer from which data will be input
423 * @tf: Taskfile to output
425 * Converts a serial ATA FIS structure to a standard ATA taskfile.
428 * Inherited from caller.
431 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
433 tf
->command
= fis
[2]; /* status */
434 tf
->feature
= fis
[3]; /* error */
441 tf
->hob_lbal
= fis
[8];
442 tf
->hob_lbam
= fis
[9];
443 tf
->hob_lbah
= fis
[10];
446 tf
->hob_nsect
= fis
[13];
449 static const u8 ata_rw_cmds
[] = {
453 ATA_CMD_READ_MULTI_EXT
,
454 ATA_CMD_WRITE_MULTI_EXT
,
458 ATA_CMD_WRITE_MULTI_FUA_EXT
,
462 ATA_CMD_PIO_READ_EXT
,
463 ATA_CMD_PIO_WRITE_EXT
,
476 ATA_CMD_WRITE_FUA_EXT
480 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
481 * @tf: command to examine and configure
482 * @dev: device tf belongs to
484 * Examine the device configuration and tf->flags to calculate
485 * the proper read/write commands and protocol to use.
490 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
494 int index
, fua
, lba48
, write
;
496 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
497 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
498 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
500 if (dev
->flags
& ATA_DFLAG_PIO
) {
501 tf
->protocol
= ATA_PROT_PIO
;
502 index
= dev
->multi_count
? 0 : 8;
503 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
504 /* Unable to use DMA due to host limitation */
505 tf
->protocol
= ATA_PROT_PIO
;
506 index
= dev
->multi_count
? 0 : 8;
508 tf
->protocol
= ATA_PROT_DMA
;
512 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
521 * ata_tf_read_block - Read block address from ATA taskfile
522 * @tf: ATA taskfile of interest
523 * @dev: ATA device @tf belongs to
528 * Read block address from @tf. This function can handle all
529 * three address formats - LBA, LBA48 and CHS. tf->protocol and
530 * flags select the address format to use.
533 * Block address read from @tf.
535 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
539 if (tf
->flags
& ATA_TFLAG_LBA
) {
540 if (tf
->flags
& ATA_TFLAG_LBA48
) {
541 block
|= (u64
)tf
->hob_lbah
<< 40;
542 block
|= (u64
)tf
->hob_lbam
<< 32;
543 block
|= tf
->hob_lbal
<< 24;
545 block
|= (tf
->device
& 0xf) << 24;
547 block
|= tf
->lbah
<< 16;
548 block
|= tf
->lbam
<< 8;
553 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
554 head
= tf
->device
& 0xf;
557 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
564 * ata_build_rw_tf - Build ATA taskfile for given read/write request
565 * @tf: Target ATA taskfile
566 * @dev: ATA device @tf belongs to
567 * @block: Block address
568 * @n_block: Number of blocks
569 * @tf_flags: RW/FUA etc...
575 * Build ATA taskfile @tf for read/write request described by
576 * @block, @n_block, @tf_flags and @tag on @dev.
580 * 0 on success, -ERANGE if the request is too large for @dev,
581 * -EINVAL if the request is invalid.
583 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
584 u64 block
, u32 n_block
, unsigned int tf_flags
,
587 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
588 tf
->flags
|= tf_flags
;
590 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
592 if (!lba_48_ok(block
, n_block
))
595 tf
->protocol
= ATA_PROT_NCQ
;
596 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
598 if (tf
->flags
& ATA_TFLAG_WRITE
)
599 tf
->command
= ATA_CMD_FPDMA_WRITE
;
601 tf
->command
= ATA_CMD_FPDMA_READ
;
603 tf
->nsect
= tag
<< 3;
604 tf
->hob_feature
= (n_block
>> 8) & 0xff;
605 tf
->feature
= n_block
& 0xff;
607 tf
->hob_lbah
= (block
>> 40) & 0xff;
608 tf
->hob_lbam
= (block
>> 32) & 0xff;
609 tf
->hob_lbal
= (block
>> 24) & 0xff;
610 tf
->lbah
= (block
>> 16) & 0xff;
611 tf
->lbam
= (block
>> 8) & 0xff;
612 tf
->lbal
= block
& 0xff;
615 if (tf
->flags
& ATA_TFLAG_FUA
)
616 tf
->device
|= 1 << 7;
617 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
618 tf
->flags
|= ATA_TFLAG_LBA
;
620 if (lba_28_ok(block
, n_block
)) {
622 tf
->device
|= (block
>> 24) & 0xf;
623 } else if (lba_48_ok(block
, n_block
)) {
624 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
628 tf
->flags
|= ATA_TFLAG_LBA48
;
630 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
632 tf
->hob_lbah
= (block
>> 40) & 0xff;
633 tf
->hob_lbam
= (block
>> 32) & 0xff;
634 tf
->hob_lbal
= (block
>> 24) & 0xff;
636 /* request too large even for LBA48 */
639 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
642 tf
->nsect
= n_block
& 0xff;
644 tf
->lbah
= (block
>> 16) & 0xff;
645 tf
->lbam
= (block
>> 8) & 0xff;
646 tf
->lbal
= block
& 0xff;
648 tf
->device
|= ATA_LBA
;
651 u32 sect
, head
, cyl
, track
;
653 /* The request -may- be too large for CHS addressing. */
654 if (!lba_28_ok(block
, n_block
))
657 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
660 /* Convert LBA to CHS */
661 track
= (u32
)block
/ dev
->sectors
;
662 cyl
= track
/ dev
->heads
;
663 head
= track
% dev
->heads
;
664 sect
= (u32
)block
% dev
->sectors
+ 1;
666 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
667 (u32
)block
, track
, cyl
, head
, sect
);
669 /* Check whether the converted CHS can fit.
673 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
676 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
687 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
688 * @pio_mask: pio_mask
689 * @mwdma_mask: mwdma_mask
690 * @udma_mask: udma_mask
692 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
693 * unsigned int xfer_mask.
701 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
702 unsigned long mwdma_mask
,
703 unsigned long udma_mask
)
705 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
706 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
707 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
711 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
712 * @xfer_mask: xfer_mask to unpack
713 * @pio_mask: resulting pio_mask
714 * @mwdma_mask: resulting mwdma_mask
715 * @udma_mask: resulting udma_mask
717 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
718 * Any NULL distination masks will be ignored.
720 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
721 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
724 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
726 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
728 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
731 static const struct ata_xfer_ent
{
735 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
736 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
737 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
742 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
743 * @xfer_mask: xfer_mask of interest
745 * Return matching XFER_* value for @xfer_mask. Only the highest
746 * bit of @xfer_mask is considered.
752 * Matching XFER_* value, 0xff if no match found.
754 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
756 int highbit
= fls(xfer_mask
) - 1;
757 const struct ata_xfer_ent
*ent
;
759 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
760 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
761 return ent
->base
+ highbit
- ent
->shift
;
766 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
767 * @xfer_mode: XFER_* of interest
769 * Return matching xfer_mask for @xfer_mode.
775 * Matching xfer_mask, 0 if no match found.
777 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
779 const struct ata_xfer_ent
*ent
;
781 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
782 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
783 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
784 & ~((1 << ent
->shift
) - 1);
789 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
790 * @xfer_mode: XFER_* of interest
792 * Return matching xfer_shift for @xfer_mode.
798 * Matching xfer_shift, -1 if no match found.
800 int ata_xfer_mode2shift(unsigned long xfer_mode
)
802 const struct ata_xfer_ent
*ent
;
804 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
805 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
811 * ata_mode_string - convert xfer_mask to string
812 * @xfer_mask: mask of bits supported; only highest bit counts.
814 * Determine string which represents the highest speed
815 * (highest bit in @modemask).
821 * Constant C string representing highest speed listed in
822 * @mode_mask, or the constant C string "<n/a>".
824 const char *ata_mode_string(unsigned long xfer_mask
)
826 static const char * const xfer_mode_str
[] = {
850 highbit
= fls(xfer_mask
) - 1;
851 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
852 return xfer_mode_str
[highbit
];
856 static const char *sata_spd_string(unsigned int spd
)
858 static const char * const spd_str
[] = {
863 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
865 return spd_str
[spd
- 1];
868 void ata_dev_disable(struct ata_device
*dev
)
870 if (ata_dev_enabled(dev
)) {
871 if (ata_msg_drv(dev
->link
->ap
))
872 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
873 ata_acpi_on_disable(dev
);
874 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
880 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
882 struct ata_link
*link
= dev
->link
;
883 struct ata_port
*ap
= link
->ap
;
885 unsigned int err_mask
;
889 * disallow DIPM for drivers which haven't set
890 * ATA_FLAG_IPM. This is because when DIPM is enabled,
891 * phy ready will be set in the interrupt status on
892 * state changes, which will cause some drivers to
893 * think there are errors - additionally drivers will
894 * need to disable hot plug.
896 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
897 ap
->pm_policy
= NOT_AVAILABLE
;
902 * For DIPM, we will only enable it for the
905 * Why? Because Disks are too stupid to know that
906 * If the host rejects a request to go to SLUMBER
907 * they should retry at PARTIAL, and instead it
908 * just would give up. So, for medium_power to
909 * work at all, we need to only allow HIPM.
911 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
917 /* no restrictions on IPM transitions */
918 scontrol
&= ~(0x3 << 8);
919 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
924 if (dev
->flags
& ATA_DFLAG_DIPM
)
925 err_mask
= ata_dev_set_feature(dev
,
926 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
929 /* allow IPM to PARTIAL */
930 scontrol
&= ~(0x1 << 8);
931 scontrol
|= (0x2 << 8);
932 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
937 * we don't have to disable DIPM since IPM flags
938 * disallow transitions to SLUMBER, which effectively
939 * disable DIPM if it does not support PARTIAL
943 case MAX_PERFORMANCE
:
944 /* disable all IPM transitions */
945 scontrol
|= (0x3 << 8);
946 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
951 * we don't have to disable DIPM since IPM flags
952 * disallow all transitions which effectively
953 * disable DIPM anyway.
958 /* FIXME: handle SET FEATURES failure */
965 * ata_dev_enable_pm - enable SATA interface power management
966 * @dev: device to enable power management
967 * @policy: the link power management policy
969 * Enable SATA Interface power management. This will enable
970 * Device Interface Power Management (DIPM) for min_power
971 * policy, and then call driver specific callbacks for
972 * enabling Host Initiated Power management.
975 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
977 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
980 struct ata_port
*ap
= dev
->link
->ap
;
982 /* set HIPM first, then DIPM */
983 if (ap
->ops
->enable_pm
)
984 rc
= ap
->ops
->enable_pm(ap
, policy
);
987 rc
= ata_dev_set_dipm(dev
, policy
);
991 ap
->pm_policy
= MAX_PERFORMANCE
;
993 ap
->pm_policy
= policy
;
994 return /* rc */; /* hopefully we can use 'rc' eventually */
999 * ata_dev_disable_pm - disable SATA interface power management
1000 * @dev: device to disable power management
1002 * Disable SATA Interface power management. This will disable
1003 * Device Interface Power Management (DIPM) without changing
1004 * policy, call driver specific callbacks for disabling Host
1005 * Initiated Power management.
1010 static void ata_dev_disable_pm(struct ata_device
*dev
)
1012 struct ata_port
*ap
= dev
->link
->ap
;
1014 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1015 if (ap
->ops
->disable_pm
)
1016 ap
->ops
->disable_pm(ap
);
1018 #endif /* CONFIG_PM */
1020 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1022 ap
->pm_policy
= policy
;
1023 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1024 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1025 ata_port_schedule_eh(ap
);
1029 static void ata_lpm_enable(struct ata_host
*host
)
1031 struct ata_link
*link
;
1032 struct ata_port
*ap
;
1033 struct ata_device
*dev
;
1036 for (i
= 0; i
< host
->n_ports
; i
++) {
1037 ap
= host
->ports
[i
];
1038 ata_port_for_each_link(link
, ap
) {
1039 ata_link_for_each_dev(dev
, link
)
1040 ata_dev_disable_pm(dev
);
1045 static void ata_lpm_disable(struct ata_host
*host
)
1049 for (i
= 0; i
< host
->n_ports
; i
++) {
1050 struct ata_port
*ap
= host
->ports
[i
];
1051 ata_lpm_schedule(ap
, ap
->pm_policy
);
1054 #endif /* CONFIG_PM */
1057 * ata_dev_classify - determine device type based on ATA-spec signature
1058 * @tf: ATA taskfile register set for device to be identified
1060 * Determine from taskfile register contents whether a device is
1061 * ATA or ATAPI, as per "Signature and persistence" section
1062 * of ATA/PI spec (volume 1, sect 5.14).
1068 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1069 * %ATA_DEV_UNKNOWN the event of failure.
1071 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1073 /* Apple's open source Darwin code hints that some devices only
1074 * put a proper signature into the LBA mid/high registers,
1075 * So, we only check those. It's sufficient for uniqueness.
1077 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1078 * signatures for ATA and ATAPI devices attached on SerialATA,
1079 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1080 * spec has never mentioned about using different signatures
1081 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1082 * Multiplier specification began to use 0x69/0x96 to identify
1083 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1084 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1085 * 0x69/0x96 shortly and described them as reserved for
1088 * We follow the current spec and consider that 0x69/0x96
1089 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1091 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1092 DPRINTK("found ATA device by sig\n");
1096 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1097 DPRINTK("found ATAPI device by sig\n");
1098 return ATA_DEV_ATAPI
;
1101 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1102 DPRINTK("found PMP device by sig\n");
1106 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1107 printk(KERN_INFO
"ata: SEMB device ignored\n");
1108 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1111 DPRINTK("unknown device\n");
1112 return ATA_DEV_UNKNOWN
;
1116 * ata_id_string - Convert IDENTIFY DEVICE page into string
1117 * @id: IDENTIFY DEVICE results we will examine
1118 * @s: string into which data is output
1119 * @ofs: offset into identify device page
1120 * @len: length of string to return. must be an even number.
1122 * The strings in the IDENTIFY DEVICE page are broken up into
1123 * 16-bit chunks. Run through the string, and output each
1124 * 8-bit chunk linearly, regardless of platform.
1130 void ata_id_string(const u16
*id
, unsigned char *s
,
1131 unsigned int ofs
, unsigned int len
)
1150 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1151 * @id: IDENTIFY DEVICE results we will examine
1152 * @s: string into which data is output
1153 * @ofs: offset into identify device page
1154 * @len: length of string to return. must be an odd number.
1156 * This function is identical to ata_id_string except that it
1157 * trims trailing spaces and terminates the resulting string with
1158 * null. @len must be actual maximum length (even number) + 1.
1163 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1164 unsigned int ofs
, unsigned int len
)
1168 WARN_ON(!(len
& 1));
1170 ata_id_string(id
, s
, ofs
, len
- 1);
1172 p
= s
+ strnlen(s
, len
- 1);
1173 while (p
> s
&& p
[-1] == ' ')
1178 static u64
ata_id_n_sectors(const u16
*id
)
1180 if (ata_id_has_lba(id
)) {
1181 if (ata_id_has_lba48(id
))
1182 return ata_id_u64(id
, 100);
1184 return ata_id_u32(id
, 60);
1186 if (ata_id_current_chs_valid(id
))
1187 return ata_id_u32(id
, 57);
1189 return id
[1] * id
[3] * id
[6];
1193 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1197 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1198 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1199 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1200 sectors
|= (tf
->lbah
& 0xff) << 16;
1201 sectors
|= (tf
->lbam
& 0xff) << 8;
1202 sectors
|= (tf
->lbal
& 0xff);
1207 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1211 sectors
|= (tf
->device
& 0x0f) << 24;
1212 sectors
|= (tf
->lbah
& 0xff) << 16;
1213 sectors
|= (tf
->lbam
& 0xff) << 8;
1214 sectors
|= (tf
->lbal
& 0xff);
1220 * ata_read_native_max_address - Read native max address
1221 * @dev: target device
1222 * @max_sectors: out parameter for the result native max address
1224 * Perform an LBA48 or LBA28 native size query upon the device in
1228 * 0 on success, -EACCES if command is aborted by the drive.
1229 * -EIO on other errors.
1231 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1233 unsigned int err_mask
;
1234 struct ata_taskfile tf
;
1235 int lba48
= ata_id_has_lba48(dev
->id
);
1237 ata_tf_init(dev
, &tf
);
1239 /* always clear all address registers */
1240 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1243 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1244 tf
.flags
|= ATA_TFLAG_LBA48
;
1246 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1248 tf
.protocol
|= ATA_PROT_NODATA
;
1249 tf
.device
|= ATA_LBA
;
1251 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1253 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1254 "max address (err_mask=0x%x)\n", err_mask
);
1255 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1261 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1263 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1264 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1270 * ata_set_max_sectors - Set max sectors
1271 * @dev: target device
1272 * @new_sectors: new max sectors value to set for the device
1274 * Set max sectors of @dev to @new_sectors.
1277 * 0 on success, -EACCES if command is aborted or denied (due to
1278 * previous non-volatile SET_MAX) by the drive. -EIO on other
1281 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1283 unsigned int err_mask
;
1284 struct ata_taskfile tf
;
1285 int lba48
= ata_id_has_lba48(dev
->id
);
1289 ata_tf_init(dev
, &tf
);
1291 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1294 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1295 tf
.flags
|= ATA_TFLAG_LBA48
;
1297 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1298 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1299 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1301 tf
.command
= ATA_CMD_SET_MAX
;
1303 tf
.device
|= (new_sectors
>> 24) & 0xf;
1306 tf
.protocol
|= ATA_PROT_NODATA
;
1307 tf
.device
|= ATA_LBA
;
1309 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1310 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1311 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1313 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1315 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1316 "max address (err_mask=0x%x)\n", err_mask
);
1317 if (err_mask
== AC_ERR_DEV
&&
1318 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1327 * ata_hpa_resize - Resize a device with an HPA set
1328 * @dev: Device to resize
1330 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1331 * it if required to the full size of the media. The caller must check
1332 * the drive has the HPA feature set enabled.
1335 * 0 on success, -errno on failure.
1337 static int ata_hpa_resize(struct ata_device
*dev
)
1339 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1340 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1341 u64 sectors
= ata_id_n_sectors(dev
->id
);
1345 /* do we need to do it? */
1346 if (dev
->class != ATA_DEV_ATA
||
1347 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1348 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1351 /* read native max address */
1352 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1354 /* If device aborted the command or HPA isn't going to
1355 * be unlocked, skip HPA resizing.
1357 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1358 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1359 "broken, skipping HPA handling\n");
1360 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1362 /* we can continue if device aborted the command */
1370 /* nothing to do? */
1371 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1372 if (!print_info
|| native_sectors
== sectors
)
1375 if (native_sectors
> sectors
)
1376 ata_dev_printk(dev
, KERN_INFO
,
1377 "HPA detected: current %llu, native %llu\n",
1378 (unsigned long long)sectors
,
1379 (unsigned long long)native_sectors
);
1380 else if (native_sectors
< sectors
)
1381 ata_dev_printk(dev
, KERN_WARNING
,
1382 "native sectors (%llu) is smaller than "
1384 (unsigned long long)native_sectors
,
1385 (unsigned long long)sectors
);
1389 /* let's unlock HPA */
1390 rc
= ata_set_max_sectors(dev
, native_sectors
);
1391 if (rc
== -EACCES
) {
1392 /* if device aborted the command, skip HPA resizing */
1393 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1394 "(%llu -> %llu), skipping HPA handling\n",
1395 (unsigned long long)sectors
,
1396 (unsigned long long)native_sectors
);
1397 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1402 /* re-read IDENTIFY data */
1403 rc
= ata_dev_reread_id(dev
, 0);
1405 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1406 "data after HPA resizing\n");
1411 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1412 ata_dev_printk(dev
, KERN_INFO
,
1413 "HPA unlocked: %llu -> %llu, native %llu\n",
1414 (unsigned long long)sectors
,
1415 (unsigned long long)new_sectors
,
1416 (unsigned long long)native_sectors
);
1423 * ata_dump_id - IDENTIFY DEVICE info debugging output
1424 * @id: IDENTIFY DEVICE page to dump
1426 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1433 static inline void ata_dump_id(const u16
*id
)
1435 DPRINTK("49==0x%04x "
1445 DPRINTK("80==0x%04x "
1455 DPRINTK("88==0x%04x "
1462 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1463 * @id: IDENTIFY data to compute xfer mask from
1465 * Compute the xfermask for this device. This is not as trivial
1466 * as it seems if we must consider early devices correctly.
1468 * FIXME: pre IDE drive timing (do we care ?).
1476 unsigned long ata_id_xfermask(const u16
*id
)
1478 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1480 /* Usual case. Word 53 indicates word 64 is valid */
1481 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1482 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1486 /* If word 64 isn't valid then Word 51 high byte holds
1487 * the PIO timing number for the maximum. Turn it into
1490 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1491 if (mode
< 5) /* Valid PIO range */
1492 pio_mask
= (2 << mode
) - 1;
1496 /* But wait.. there's more. Design your standards by
1497 * committee and you too can get a free iordy field to
1498 * process. However its the speeds not the modes that
1499 * are supported... Note drivers using the timing API
1500 * will get this right anyway
1504 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1506 if (ata_id_is_cfa(id
)) {
1508 * Process compact flash extended modes
1510 int pio
= id
[163] & 0x7;
1511 int dma
= (id
[163] >> 3) & 7;
1514 pio_mask
|= (1 << 5);
1516 pio_mask
|= (1 << 6);
1518 mwdma_mask
|= (1 << 3);
1520 mwdma_mask
|= (1 << 4);
1524 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1525 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1527 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1531 * ata_pio_queue_task - Queue port_task
1532 * @ap: The ata_port to queue port_task for
1533 * @fn: workqueue function to be scheduled
1534 * @data: data for @fn to use
1535 * @delay: delay time in msecs for workqueue function
1537 * Schedule @fn(@data) for execution after @delay jiffies using
1538 * port_task. There is one port_task per port and it's the
1539 * user(low level driver)'s responsibility to make sure that only
1540 * one task is active at any given time.
1542 * libata core layer takes care of synchronization between
1543 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1547 * Inherited from caller.
1549 void ata_pio_queue_task(struct ata_port
*ap
, void *data
, unsigned long delay
)
1551 ap
->port_task_data
= data
;
1553 /* may fail if ata_port_flush_task() in progress */
1554 queue_delayed_work(ata_wq
, &ap
->port_task
, msecs_to_jiffies(delay
));
1558 * ata_port_flush_task - Flush port_task
1559 * @ap: The ata_port to flush port_task for
1561 * After this function completes, port_task is guranteed not to
1562 * be running or scheduled.
1565 * Kernel thread context (may sleep)
1567 void ata_port_flush_task(struct ata_port
*ap
)
1571 cancel_rearming_delayed_work(&ap
->port_task
);
1573 if (ata_msg_ctl(ap
))
1574 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1577 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1579 struct completion
*waiting
= qc
->private_data
;
1585 * ata_exec_internal_sg - execute libata internal command
1586 * @dev: Device to which the command is sent
1587 * @tf: Taskfile registers for the command and the result
1588 * @cdb: CDB for packet command
1589 * @dma_dir: Data tranfer direction of the command
1590 * @sgl: sg list for the data buffer of the command
1591 * @n_elem: Number of sg entries
1592 * @timeout: Timeout in msecs (0 for default)
1594 * Executes libata internal command with timeout. @tf contains
1595 * command on entry and result on return. Timeout and error
1596 * conditions are reported via return value. No recovery action
1597 * is taken after a command times out. It's caller's duty to
1598 * clean up after timeout.
1601 * None. Should be called with kernel context, might sleep.
1604 * Zero on success, AC_ERR_* mask on failure
1606 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1607 struct ata_taskfile
*tf
, const u8
*cdb
,
1608 int dma_dir
, struct scatterlist
*sgl
,
1609 unsigned int n_elem
, unsigned long timeout
)
1611 struct ata_link
*link
= dev
->link
;
1612 struct ata_port
*ap
= link
->ap
;
1613 u8 command
= tf
->command
;
1614 int auto_timeout
= 0;
1615 struct ata_queued_cmd
*qc
;
1616 unsigned int tag
, preempted_tag
;
1617 u32 preempted_sactive
, preempted_qc_active
;
1618 int preempted_nr_active_links
;
1619 DECLARE_COMPLETION_ONSTACK(wait
);
1620 unsigned long flags
;
1621 unsigned int err_mask
;
1624 spin_lock_irqsave(ap
->lock
, flags
);
1626 /* no internal command while frozen */
1627 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1628 spin_unlock_irqrestore(ap
->lock
, flags
);
1629 return AC_ERR_SYSTEM
;
1632 /* initialize internal qc */
1634 /* XXX: Tag 0 is used for drivers with legacy EH as some
1635 * drivers choke if any other tag is given. This breaks
1636 * ata_tag_internal() test for those drivers. Don't use new
1637 * EH stuff without converting to it.
1639 if (ap
->ops
->error_handler
)
1640 tag
= ATA_TAG_INTERNAL
;
1644 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1646 qc
= __ata_qc_from_tag(ap
, tag
);
1654 preempted_tag
= link
->active_tag
;
1655 preempted_sactive
= link
->sactive
;
1656 preempted_qc_active
= ap
->qc_active
;
1657 preempted_nr_active_links
= ap
->nr_active_links
;
1658 link
->active_tag
= ATA_TAG_POISON
;
1661 ap
->nr_active_links
= 0;
1663 /* prepare & issue qc */
1666 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1667 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1668 qc
->dma_dir
= dma_dir
;
1669 if (dma_dir
!= DMA_NONE
) {
1670 unsigned int i
, buflen
= 0;
1671 struct scatterlist
*sg
;
1673 for_each_sg(sgl
, sg
, n_elem
, i
)
1674 buflen
+= sg
->length
;
1676 ata_sg_init(qc
, sgl
, n_elem
);
1677 qc
->nbytes
= buflen
;
1680 qc
->private_data
= &wait
;
1681 qc
->complete_fn
= ata_qc_complete_internal
;
1685 spin_unlock_irqrestore(ap
->lock
, flags
);
1688 if (ata_probe_timeout
)
1689 timeout
= ata_probe_timeout
* 1000;
1691 timeout
= ata_internal_cmd_timeout(dev
, command
);
1696 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1698 ata_port_flush_task(ap
);
1701 spin_lock_irqsave(ap
->lock
, flags
);
1703 /* We're racing with irq here. If we lose, the
1704 * following test prevents us from completing the qc
1705 * twice. If we win, the port is frozen and will be
1706 * cleaned up by ->post_internal_cmd().
1708 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1709 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1711 if (ap
->ops
->error_handler
)
1712 ata_port_freeze(ap
);
1714 ata_qc_complete(qc
);
1716 if (ata_msg_warn(ap
))
1717 ata_dev_printk(dev
, KERN_WARNING
,
1718 "qc timeout (cmd 0x%x)\n", command
);
1721 spin_unlock_irqrestore(ap
->lock
, flags
);
1724 /* do post_internal_cmd */
1725 if (ap
->ops
->post_internal_cmd
)
1726 ap
->ops
->post_internal_cmd(qc
);
1728 /* perform minimal error analysis */
1729 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1730 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1731 qc
->err_mask
|= AC_ERR_DEV
;
1734 qc
->err_mask
|= AC_ERR_OTHER
;
1736 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1737 qc
->err_mask
&= ~AC_ERR_OTHER
;
1741 spin_lock_irqsave(ap
->lock
, flags
);
1743 *tf
= qc
->result_tf
;
1744 err_mask
= qc
->err_mask
;
1747 link
->active_tag
= preempted_tag
;
1748 link
->sactive
= preempted_sactive
;
1749 ap
->qc_active
= preempted_qc_active
;
1750 ap
->nr_active_links
= preempted_nr_active_links
;
1752 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1753 * Until those drivers are fixed, we detect the condition
1754 * here, fail the command with AC_ERR_SYSTEM and reenable the
1757 * Note that this doesn't change any behavior as internal
1758 * command failure results in disabling the device in the
1759 * higher layer for LLDDs without new reset/EH callbacks.
1761 * Kill the following code as soon as those drivers are fixed.
1763 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1764 err_mask
|= AC_ERR_SYSTEM
;
1768 spin_unlock_irqrestore(ap
->lock
, flags
);
1770 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1771 ata_internal_cmd_timed_out(dev
, command
);
1777 * ata_exec_internal - execute libata internal command
1778 * @dev: Device to which the command is sent
1779 * @tf: Taskfile registers for the command and the result
1780 * @cdb: CDB for packet command
1781 * @dma_dir: Data tranfer direction of the command
1782 * @buf: Data buffer of the command
1783 * @buflen: Length of data buffer
1784 * @timeout: Timeout in msecs (0 for default)
1786 * Wrapper around ata_exec_internal_sg() which takes simple
1787 * buffer instead of sg list.
1790 * None. Should be called with kernel context, might sleep.
1793 * Zero on success, AC_ERR_* mask on failure
1795 unsigned ata_exec_internal(struct ata_device
*dev
,
1796 struct ata_taskfile
*tf
, const u8
*cdb
,
1797 int dma_dir
, void *buf
, unsigned int buflen
,
1798 unsigned long timeout
)
1800 struct scatterlist
*psg
= NULL
, sg
;
1801 unsigned int n_elem
= 0;
1803 if (dma_dir
!= DMA_NONE
) {
1805 sg_init_one(&sg
, buf
, buflen
);
1810 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1815 * ata_do_simple_cmd - execute simple internal command
1816 * @dev: Device to which the command is sent
1817 * @cmd: Opcode to execute
1819 * Execute a 'simple' command, that only consists of the opcode
1820 * 'cmd' itself, without filling any other registers
1823 * Kernel thread context (may sleep).
1826 * Zero on success, AC_ERR_* mask on failure
1828 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1830 struct ata_taskfile tf
;
1832 ata_tf_init(dev
, &tf
);
1835 tf
.flags
|= ATA_TFLAG_DEVICE
;
1836 tf
.protocol
= ATA_PROT_NODATA
;
1838 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1842 * ata_pio_need_iordy - check if iordy needed
1845 * Check if the current speed of the device requires IORDY. Used
1846 * by various controllers for chip configuration.
1849 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1851 /* Controller doesn't support IORDY. Probably a pointless check
1852 as the caller should know this */
1853 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1855 /* PIO3 and higher it is mandatory */
1856 if (adev
->pio_mode
> XFER_PIO_2
)
1858 /* We turn it on when possible */
1859 if (ata_id_has_iordy(adev
->id
))
1865 * ata_pio_mask_no_iordy - Return the non IORDY mask
1868 * Compute the highest mode possible if we are not using iordy. Return
1869 * -1 if no iordy mode is available.
1872 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1874 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1875 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1876 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1877 /* Is the speed faster than the drive allows non IORDY ? */
1879 /* This is cycle times not frequency - watch the logic! */
1880 if (pio
> 240) /* PIO2 is 240nS per cycle */
1881 return 3 << ATA_SHIFT_PIO
;
1882 return 7 << ATA_SHIFT_PIO
;
1885 return 3 << ATA_SHIFT_PIO
;
1889 * ata_dev_read_id - Read ID data from the specified device
1890 * @dev: target device
1891 * @p_class: pointer to class of the target device (may be changed)
1892 * @flags: ATA_READID_* flags
1893 * @id: buffer to read IDENTIFY data into
1895 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1896 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1897 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1898 * for pre-ATA4 drives.
1900 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1901 * now we abort if we hit that case.
1904 * Kernel thread context (may sleep)
1907 * 0 on success, -errno otherwise.
1909 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1910 unsigned int flags
, u16
*id
)
1912 struct ata_port
*ap
= dev
->link
->ap
;
1913 unsigned int class = *p_class
;
1914 struct ata_taskfile tf
;
1915 unsigned int err_mask
= 0;
1917 int may_fallback
= 1, tried_spinup
= 0;
1920 if (ata_msg_ctl(ap
))
1921 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
1924 ata_tf_init(dev
, &tf
);
1928 tf
.command
= ATA_CMD_ID_ATA
;
1931 tf
.command
= ATA_CMD_ID_ATAPI
;
1935 reason
= "unsupported class";
1939 tf
.protocol
= ATA_PROT_PIO
;
1941 /* Some devices choke if TF registers contain garbage. Make
1942 * sure those are properly initialized.
1944 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1946 /* Device presence detection is unreliable on some
1947 * controllers. Always poll IDENTIFY if available.
1949 tf
.flags
|= ATA_TFLAG_POLLING
;
1951 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1952 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1954 if (err_mask
& AC_ERR_NODEV_HINT
) {
1955 ata_dev_printk(dev
, KERN_DEBUG
,
1956 "NODEV after polling detection\n");
1960 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1961 /* Device or controller might have reported
1962 * the wrong device class. Give a shot at the
1963 * other IDENTIFY if the current one is
1964 * aborted by the device.
1969 if (class == ATA_DEV_ATA
)
1970 class = ATA_DEV_ATAPI
;
1972 class = ATA_DEV_ATA
;
1976 /* Control reaches here iff the device aborted
1977 * both flavors of IDENTIFYs which happens
1978 * sometimes with phantom devices.
1980 ata_dev_printk(dev
, KERN_DEBUG
,
1981 "both IDENTIFYs aborted, assuming NODEV\n");
1986 reason
= "I/O error";
1990 /* Falling back doesn't make sense if ID data was read
1991 * successfully at least once.
1995 swap_buf_le16(id
, ATA_ID_WORDS
);
1999 reason
= "device reports invalid type";
2001 if (class == ATA_DEV_ATA
) {
2002 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2005 if (ata_id_is_ata(id
))
2009 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2012 * Drive powered-up in standby mode, and requires a specific
2013 * SET_FEATURES spin-up subcommand before it will accept
2014 * anything other than the original IDENTIFY command.
2016 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2017 if (err_mask
&& id
[2] != 0x738c) {
2019 reason
= "SPINUP failed";
2023 * If the drive initially returned incomplete IDENTIFY info,
2024 * we now must reissue the IDENTIFY command.
2026 if (id
[2] == 0x37c8)
2030 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2032 * The exact sequence expected by certain pre-ATA4 drives is:
2034 * IDENTIFY (optional in early ATA)
2035 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2037 * Some drives were very specific about that exact sequence.
2039 * Note that ATA4 says lba is mandatory so the second check
2040 * shoud never trigger.
2042 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2043 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2046 reason
= "INIT_DEV_PARAMS failed";
2050 /* current CHS translation info (id[53-58]) might be
2051 * changed. reread the identify device info.
2053 flags
&= ~ATA_READID_POSTRESET
;
2063 if (ata_msg_warn(ap
))
2064 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2065 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2069 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2071 struct ata_port
*ap
= dev
->link
->ap
;
2072 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2075 static void ata_dev_config_ncq(struct ata_device
*dev
,
2076 char *desc
, size_t desc_sz
)
2078 struct ata_port
*ap
= dev
->link
->ap
;
2079 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2081 if (!ata_id_has_ncq(dev
->id
)) {
2085 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2086 snprintf(desc
, desc_sz
, "NCQ (not used)");
2089 if (ap
->flags
& ATA_FLAG_NCQ
) {
2090 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2091 dev
->flags
|= ATA_DFLAG_NCQ
;
2094 if (hdepth
>= ddepth
)
2095 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2097 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2101 * ata_dev_configure - Configure the specified ATA/ATAPI device
2102 * @dev: Target device to configure
2104 * Configure @dev according to @dev->id. Generic and low-level
2105 * driver specific fixups are also applied.
2108 * Kernel thread context (may sleep)
2111 * 0 on success, -errno otherwise
2113 int ata_dev_configure(struct ata_device
*dev
)
2115 struct ata_port
*ap
= dev
->link
->ap
;
2116 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2117 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2118 const u16
*id
= dev
->id
;
2119 unsigned long xfer_mask
;
2120 char revbuf
[7]; /* XYZ-99\0 */
2121 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2122 char modelbuf
[ATA_ID_PROD_LEN
+1];
2125 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2126 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2131 if (ata_msg_probe(ap
))
2132 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2135 dev
->horkage
|= ata_dev_blacklisted(dev
);
2136 ata_force_horkage(dev
);
2138 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2139 ata_dev_printk(dev
, KERN_INFO
,
2140 "unsupported device, disabling\n");
2141 ata_dev_disable(dev
);
2145 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2146 dev
->class == ATA_DEV_ATAPI
) {
2147 ata_dev_printk(dev
, KERN_WARNING
,
2148 "WARNING: ATAPI is %s, device ignored.\n",
2149 atapi_enabled
? "not supported with this driver"
2151 ata_dev_disable(dev
);
2155 /* let ACPI work its magic */
2156 rc
= ata_acpi_on_devcfg(dev
);
2160 /* massage HPA, do it early as it might change IDENTIFY data */
2161 rc
= ata_hpa_resize(dev
);
2165 /* print device capabilities */
2166 if (ata_msg_probe(ap
))
2167 ata_dev_printk(dev
, KERN_DEBUG
,
2168 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2169 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2171 id
[49], id
[82], id
[83], id
[84],
2172 id
[85], id
[86], id
[87], id
[88]);
2174 /* initialize to-be-configured parameters */
2175 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2176 dev
->max_sectors
= 0;
2184 * common ATA, ATAPI feature tests
2187 /* find max transfer mode; for printk only */
2188 xfer_mask
= ata_id_xfermask(id
);
2190 if (ata_msg_probe(ap
))
2193 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2194 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2197 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2200 /* ATA-specific feature tests */
2201 if (dev
->class == ATA_DEV_ATA
) {
2202 if (ata_id_is_cfa(id
)) {
2203 if (id
[162] & 1) /* CPRM may make this media unusable */
2204 ata_dev_printk(dev
, KERN_WARNING
,
2205 "supports DRM functions and may "
2206 "not be fully accessable.\n");
2207 snprintf(revbuf
, 7, "CFA");
2209 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2210 /* Warn the user if the device has TPM extensions */
2211 if (ata_id_has_tpm(id
))
2212 ata_dev_printk(dev
, KERN_WARNING
,
2213 "supports DRM functions and may "
2214 "not be fully accessable.\n");
2217 dev
->n_sectors
= ata_id_n_sectors(id
);
2219 if (dev
->id
[59] & 0x100)
2220 dev
->multi_count
= dev
->id
[59] & 0xff;
2222 if (ata_id_has_lba(id
)) {
2223 const char *lba_desc
;
2227 dev
->flags
|= ATA_DFLAG_LBA
;
2228 if (ata_id_has_lba48(id
)) {
2229 dev
->flags
|= ATA_DFLAG_LBA48
;
2232 if (dev
->n_sectors
>= (1UL << 28) &&
2233 ata_id_has_flush_ext(id
))
2234 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2238 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2240 /* print device info to dmesg */
2241 if (ata_msg_drv(ap
) && print_info
) {
2242 ata_dev_printk(dev
, KERN_INFO
,
2243 "%s: %s, %s, max %s\n",
2244 revbuf
, modelbuf
, fwrevbuf
,
2245 ata_mode_string(xfer_mask
));
2246 ata_dev_printk(dev
, KERN_INFO
,
2247 "%Lu sectors, multi %u: %s %s\n",
2248 (unsigned long long)dev
->n_sectors
,
2249 dev
->multi_count
, lba_desc
, ncq_desc
);
2254 /* Default translation */
2255 dev
->cylinders
= id
[1];
2257 dev
->sectors
= id
[6];
2259 if (ata_id_current_chs_valid(id
)) {
2260 /* Current CHS translation is valid. */
2261 dev
->cylinders
= id
[54];
2262 dev
->heads
= id
[55];
2263 dev
->sectors
= id
[56];
2266 /* print device info to dmesg */
2267 if (ata_msg_drv(ap
) && print_info
) {
2268 ata_dev_printk(dev
, KERN_INFO
,
2269 "%s: %s, %s, max %s\n",
2270 revbuf
, modelbuf
, fwrevbuf
,
2271 ata_mode_string(xfer_mask
));
2272 ata_dev_printk(dev
, KERN_INFO
,
2273 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2274 (unsigned long long)dev
->n_sectors
,
2275 dev
->multi_count
, dev
->cylinders
,
2276 dev
->heads
, dev
->sectors
);
2283 /* ATAPI-specific feature tests */
2284 else if (dev
->class == ATA_DEV_ATAPI
) {
2285 const char *cdb_intr_string
= "";
2286 const char *atapi_an_string
= "";
2287 const char *dma_dir_string
= "";
2290 rc
= atapi_cdb_len(id
);
2291 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2292 if (ata_msg_warn(ap
))
2293 ata_dev_printk(dev
, KERN_WARNING
,
2294 "unsupported CDB len\n");
2298 dev
->cdb_len
= (unsigned int) rc
;
2300 /* Enable ATAPI AN if both the host and device have
2301 * the support. If PMP is attached, SNTF is required
2302 * to enable ATAPI AN to discern between PHY status
2303 * changed notifications and ATAPI ANs.
2305 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2306 (!sata_pmp_attached(ap
) ||
2307 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2308 unsigned int err_mask
;
2310 /* issue SET feature command to turn this on */
2311 err_mask
= ata_dev_set_feature(dev
,
2312 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2314 ata_dev_printk(dev
, KERN_ERR
,
2315 "failed to enable ATAPI AN "
2316 "(err_mask=0x%x)\n", err_mask
);
2318 dev
->flags
|= ATA_DFLAG_AN
;
2319 atapi_an_string
= ", ATAPI AN";
2323 if (ata_id_cdb_intr(dev
->id
)) {
2324 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2325 cdb_intr_string
= ", CDB intr";
2328 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2329 dev
->flags
|= ATA_DFLAG_DMADIR
;
2330 dma_dir_string
= ", DMADIR";
2333 /* print device info to dmesg */
2334 if (ata_msg_drv(ap
) && print_info
)
2335 ata_dev_printk(dev
, KERN_INFO
,
2336 "ATAPI: %s, %s, max %s%s%s%s\n",
2338 ata_mode_string(xfer_mask
),
2339 cdb_intr_string
, atapi_an_string
,
2343 /* determine max_sectors */
2344 dev
->max_sectors
= ATA_MAX_SECTORS
;
2345 if (dev
->flags
& ATA_DFLAG_LBA48
)
2346 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2348 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2349 if (ata_id_has_hipm(dev
->id
))
2350 dev
->flags
|= ATA_DFLAG_HIPM
;
2351 if (ata_id_has_dipm(dev
->id
))
2352 dev
->flags
|= ATA_DFLAG_DIPM
;
2355 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2357 if (ata_dev_knobble(dev
)) {
2358 if (ata_msg_drv(ap
) && print_info
)
2359 ata_dev_printk(dev
, KERN_INFO
,
2360 "applying bridge limits\n");
2361 dev
->udma_mask
&= ATA_UDMA5
;
2362 dev
->max_sectors
= ATA_MAX_SECTORS
;
2365 if ((dev
->class == ATA_DEV_ATAPI
) &&
2366 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2367 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2368 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2371 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2372 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2375 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2376 dev
->horkage
|= ATA_HORKAGE_IPM
;
2378 /* reset link pm_policy for this port to no pm */
2379 ap
->pm_policy
= MAX_PERFORMANCE
;
2382 if (ap
->ops
->dev_config
)
2383 ap
->ops
->dev_config(dev
);
2385 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2386 /* Let the user know. We don't want to disallow opens for
2387 rescue purposes, or in case the vendor is just a blithering
2388 idiot. Do this after the dev_config call as some controllers
2389 with buggy firmware may want to avoid reporting false device
2393 ata_dev_printk(dev
, KERN_WARNING
,
2394 "Drive reports diagnostics failure. This may indicate a drive\n");
2395 ata_dev_printk(dev
, KERN_WARNING
,
2396 "fault or invalid emulation. Contact drive vendor for information.\n");
2403 if (ata_msg_probe(ap
))
2404 ata_dev_printk(dev
, KERN_DEBUG
,
2405 "%s: EXIT, err\n", __func__
);
2410 * ata_cable_40wire - return 40 wire cable type
2413 * Helper method for drivers which want to hardwire 40 wire cable
2417 int ata_cable_40wire(struct ata_port
*ap
)
2419 return ATA_CBL_PATA40
;
2423 * ata_cable_80wire - return 80 wire cable type
2426 * Helper method for drivers which want to hardwire 80 wire cable
2430 int ata_cable_80wire(struct ata_port
*ap
)
2432 return ATA_CBL_PATA80
;
2436 * ata_cable_unknown - return unknown PATA cable.
2439 * Helper method for drivers which have no PATA cable detection.
2442 int ata_cable_unknown(struct ata_port
*ap
)
2444 return ATA_CBL_PATA_UNK
;
2448 * ata_cable_ignore - return ignored PATA cable.
2451 * Helper method for drivers which don't use cable type to limit
2454 int ata_cable_ignore(struct ata_port
*ap
)
2456 return ATA_CBL_PATA_IGN
;
2460 * ata_cable_sata - return SATA cable type
2463 * Helper method for drivers which have SATA cables
2466 int ata_cable_sata(struct ata_port
*ap
)
2468 return ATA_CBL_SATA
;
2472 * ata_bus_probe - Reset and probe ATA bus
2475 * Master ATA bus probing function. Initiates a hardware-dependent
2476 * bus reset, then attempts to identify any devices found on
2480 * PCI/etc. bus probe sem.
2483 * Zero on success, negative errno otherwise.
2486 int ata_bus_probe(struct ata_port
*ap
)
2488 unsigned int classes
[ATA_MAX_DEVICES
];
2489 int tries
[ATA_MAX_DEVICES
];
2491 struct ata_device
*dev
;
2495 ata_link_for_each_dev(dev
, &ap
->link
)
2496 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2499 ata_link_for_each_dev(dev
, &ap
->link
) {
2500 /* If we issue an SRST then an ATA drive (not ATAPI)
2501 * may change configuration and be in PIO0 timing. If
2502 * we do a hard reset (or are coming from power on)
2503 * this is true for ATA or ATAPI. Until we've set a
2504 * suitable controller mode we should not touch the
2505 * bus as we may be talking too fast.
2507 dev
->pio_mode
= XFER_PIO_0
;
2509 /* If the controller has a pio mode setup function
2510 * then use it to set the chipset to rights. Don't
2511 * touch the DMA setup as that will be dealt with when
2512 * configuring devices.
2514 if (ap
->ops
->set_piomode
)
2515 ap
->ops
->set_piomode(ap
, dev
);
2518 /* reset and determine device classes */
2519 ap
->ops
->phy_reset(ap
);
2521 ata_link_for_each_dev(dev
, &ap
->link
) {
2522 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2523 dev
->class != ATA_DEV_UNKNOWN
)
2524 classes
[dev
->devno
] = dev
->class;
2526 classes
[dev
->devno
] = ATA_DEV_NONE
;
2528 dev
->class = ATA_DEV_UNKNOWN
;
2533 /* read IDENTIFY page and configure devices. We have to do the identify
2534 specific sequence bass-ackwards so that PDIAG- is released by
2537 ata_link_for_each_dev_reverse(dev
, &ap
->link
) {
2538 if (tries
[dev
->devno
])
2539 dev
->class = classes
[dev
->devno
];
2541 if (!ata_dev_enabled(dev
))
2544 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2550 /* Now ask for the cable type as PDIAG- should have been released */
2551 if (ap
->ops
->cable_detect
)
2552 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2554 /* We may have SATA bridge glue hiding here irrespective of the
2555 reported cable types and sensed types */
2556 ata_link_for_each_dev(dev
, &ap
->link
) {
2557 if (!ata_dev_enabled(dev
))
2559 /* SATA drives indicate we have a bridge. We don't know which
2560 end of the link the bridge is which is a problem */
2561 if (ata_id_is_sata(dev
->id
))
2562 ap
->cbl
= ATA_CBL_SATA
;
2565 /* After the identify sequence we can now set up the devices. We do
2566 this in the normal order so that the user doesn't get confused */
2568 ata_link_for_each_dev(dev
, &ap
->link
) {
2569 if (!ata_dev_enabled(dev
))
2572 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2573 rc
= ata_dev_configure(dev
);
2574 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2579 /* configure transfer mode */
2580 rc
= ata_set_mode(&ap
->link
, &dev
);
2584 ata_link_for_each_dev(dev
, &ap
->link
)
2585 if (ata_dev_enabled(dev
))
2588 /* no device present, disable port */
2589 ata_port_disable(ap
);
2593 tries
[dev
->devno
]--;
2597 /* eeek, something went very wrong, give up */
2598 tries
[dev
->devno
] = 0;
2602 /* give it just one more chance */
2603 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2605 if (tries
[dev
->devno
] == 1) {
2606 /* This is the last chance, better to slow
2607 * down than lose it.
2609 sata_down_spd_limit(&ap
->link
);
2610 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2614 if (!tries
[dev
->devno
])
2615 ata_dev_disable(dev
);
2621 * ata_port_probe - Mark port as enabled
2622 * @ap: Port for which we indicate enablement
2624 * Modify @ap data structure such that the system
2625 * thinks that the entire port is enabled.
2627 * LOCKING: host lock, or some other form of
2631 void ata_port_probe(struct ata_port
*ap
)
2633 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2637 * sata_print_link_status - Print SATA link status
2638 * @link: SATA link to printk link status about
2640 * This function prints link speed and status of a SATA link.
2645 static void sata_print_link_status(struct ata_link
*link
)
2647 u32 sstatus
, scontrol
, tmp
;
2649 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2651 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2653 if (ata_link_online(link
)) {
2654 tmp
= (sstatus
>> 4) & 0xf;
2655 ata_link_printk(link
, KERN_INFO
,
2656 "SATA link up %s (SStatus %X SControl %X)\n",
2657 sata_spd_string(tmp
), sstatus
, scontrol
);
2659 ata_link_printk(link
, KERN_INFO
,
2660 "SATA link down (SStatus %X SControl %X)\n",
2666 * ata_dev_pair - return other device on cable
2669 * Obtain the other device on the same cable, or if none is
2670 * present NULL is returned
2673 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2675 struct ata_link
*link
= adev
->link
;
2676 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2677 if (!ata_dev_enabled(pair
))
2683 * ata_port_disable - Disable port.
2684 * @ap: Port to be disabled.
2686 * Modify @ap data structure such that the system
2687 * thinks that the entire port is disabled, and should
2688 * never attempt to probe or communicate with devices
2691 * LOCKING: host lock, or some other form of
2695 void ata_port_disable(struct ata_port
*ap
)
2697 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2698 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2699 ap
->flags
|= ATA_FLAG_DISABLED
;
2703 * sata_down_spd_limit - adjust SATA spd limit downward
2704 * @link: Link to adjust SATA spd limit for
2706 * Adjust SATA spd limit of @link downward. Note that this
2707 * function only adjusts the limit. The change must be applied
2708 * using sata_set_spd().
2711 * Inherited from caller.
2714 * 0 on success, negative errno on failure
2716 int sata_down_spd_limit(struct ata_link
*link
)
2718 u32 sstatus
, spd
, mask
;
2721 if (!sata_scr_valid(link
))
2724 /* If SCR can be read, use it to determine the current SPD.
2725 * If not, use cached value in link->sata_spd.
2727 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2729 spd
= (sstatus
>> 4) & 0xf;
2731 spd
= link
->sata_spd
;
2733 mask
= link
->sata_spd_limit
;
2737 /* unconditionally mask off the highest bit */
2738 highbit
= fls(mask
) - 1;
2739 mask
&= ~(1 << highbit
);
2741 /* Mask off all speeds higher than or equal to the current
2742 * one. Force 1.5Gbps if current SPD is not available.
2745 mask
&= (1 << (spd
- 1)) - 1;
2749 /* were we already at the bottom? */
2753 link
->sata_spd_limit
= mask
;
2755 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2756 sata_spd_string(fls(mask
)));
2761 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2763 struct ata_link
*host_link
= &link
->ap
->link
;
2764 u32 limit
, target
, spd
;
2766 limit
= link
->sata_spd_limit
;
2768 /* Don't configure downstream link faster than upstream link.
2769 * It doesn't speed up anything and some PMPs choke on such
2772 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2773 limit
&= (1 << host_link
->sata_spd
) - 1;
2775 if (limit
== UINT_MAX
)
2778 target
= fls(limit
);
2780 spd
= (*scontrol
>> 4) & 0xf;
2781 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2783 return spd
!= target
;
2787 * sata_set_spd_needed - is SATA spd configuration needed
2788 * @link: Link in question
2790 * Test whether the spd limit in SControl matches
2791 * @link->sata_spd_limit. This function is used to determine
2792 * whether hardreset is necessary to apply SATA spd
2796 * Inherited from caller.
2799 * 1 if SATA spd configuration is needed, 0 otherwise.
2801 static int sata_set_spd_needed(struct ata_link
*link
)
2805 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2808 return __sata_set_spd_needed(link
, &scontrol
);
2812 * sata_set_spd - set SATA spd according to spd limit
2813 * @link: Link to set SATA spd for
2815 * Set SATA spd of @link according to sata_spd_limit.
2818 * Inherited from caller.
2821 * 0 if spd doesn't need to be changed, 1 if spd has been
2822 * changed. Negative errno if SCR registers are inaccessible.
2824 int sata_set_spd(struct ata_link
*link
)
2829 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2832 if (!__sata_set_spd_needed(link
, &scontrol
))
2835 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2842 * This mode timing computation functionality is ported over from
2843 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2846 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2847 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2848 * for UDMA6, which is currently supported only by Maxtor drives.
2850 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2853 static const struct ata_timing ata_timing
[] = {
2854 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2855 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2856 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2857 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2858 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2859 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2860 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2861 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2863 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2864 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2865 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2867 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2868 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2869 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2870 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2871 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2873 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2874 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2875 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2876 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2877 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2878 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2879 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2880 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2885 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2886 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2888 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2890 q
->setup
= EZ(t
->setup
* 1000, T
);
2891 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2892 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2893 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2894 q
->active
= EZ(t
->active
* 1000, T
);
2895 q
->recover
= EZ(t
->recover
* 1000, T
);
2896 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2897 q
->udma
= EZ(t
->udma
* 1000, UT
);
2900 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2901 struct ata_timing
*m
, unsigned int what
)
2903 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2904 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2905 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2906 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2907 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2908 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2909 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2910 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2913 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2915 const struct ata_timing
*t
= ata_timing
;
2917 while (xfer_mode
> t
->mode
)
2920 if (xfer_mode
== t
->mode
)
2925 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2926 struct ata_timing
*t
, int T
, int UT
)
2928 const struct ata_timing
*s
;
2929 struct ata_timing p
;
2935 if (!(s
= ata_timing_find_mode(speed
)))
2938 memcpy(t
, s
, sizeof(*s
));
2941 * If the drive is an EIDE drive, it can tell us it needs extended
2942 * PIO/MW_DMA cycle timing.
2945 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2946 memset(&p
, 0, sizeof(p
));
2947 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2948 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2949 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2950 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2951 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2953 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2957 * Convert the timing to bus clock counts.
2960 ata_timing_quantize(t
, t
, T
, UT
);
2963 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2964 * S.M.A.R.T * and some other commands. We have to ensure that the
2965 * DMA cycle timing is slower/equal than the fastest PIO timing.
2968 if (speed
> XFER_PIO_6
) {
2969 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2970 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2974 * Lengthen active & recovery time so that cycle time is correct.
2977 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2978 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2979 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2982 if (t
->active
+ t
->recover
< t
->cycle
) {
2983 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2984 t
->recover
= t
->cycle
- t
->active
;
2987 /* In a few cases quantisation may produce enough errors to
2988 leave t->cycle too low for the sum of active and recovery
2989 if so we must correct this */
2990 if (t
->active
+ t
->recover
> t
->cycle
)
2991 t
->cycle
= t
->active
+ t
->recover
;
2997 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2998 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
2999 * @cycle: cycle duration in ns
3001 * Return matching xfer mode for @cycle. The returned mode is of
3002 * the transfer type specified by @xfer_shift. If @cycle is too
3003 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3004 * than the fastest known mode, the fasted mode is returned.
3010 * Matching xfer_mode, 0xff if no match found.
3012 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3014 u8 base_mode
= 0xff, last_mode
= 0xff;
3015 const struct ata_xfer_ent
*ent
;
3016 const struct ata_timing
*t
;
3018 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3019 if (ent
->shift
== xfer_shift
)
3020 base_mode
= ent
->base
;
3022 for (t
= ata_timing_find_mode(base_mode
);
3023 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3024 unsigned short this_cycle
;
3026 switch (xfer_shift
) {
3028 case ATA_SHIFT_MWDMA
:
3029 this_cycle
= t
->cycle
;
3031 case ATA_SHIFT_UDMA
:
3032 this_cycle
= t
->udma
;
3038 if (cycle
> this_cycle
)
3041 last_mode
= t
->mode
;
3048 * ata_down_xfermask_limit - adjust dev xfer masks downward
3049 * @dev: Device to adjust xfer masks
3050 * @sel: ATA_DNXFER_* selector
3052 * Adjust xfer masks of @dev downward. Note that this function
3053 * does not apply the change. Invoking ata_set_mode() afterwards
3054 * will apply the limit.
3057 * Inherited from caller.
3060 * 0 on success, negative errno on failure
3062 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3065 unsigned long orig_mask
, xfer_mask
;
3066 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3069 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3070 sel
&= ~ATA_DNXFER_QUIET
;
3072 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3075 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3078 case ATA_DNXFER_PIO
:
3079 highbit
= fls(pio_mask
) - 1;
3080 pio_mask
&= ~(1 << highbit
);
3083 case ATA_DNXFER_DMA
:
3085 highbit
= fls(udma_mask
) - 1;
3086 udma_mask
&= ~(1 << highbit
);
3089 } else if (mwdma_mask
) {
3090 highbit
= fls(mwdma_mask
) - 1;
3091 mwdma_mask
&= ~(1 << highbit
);
3097 case ATA_DNXFER_40C
:
3098 udma_mask
&= ATA_UDMA_MASK_40C
;
3101 case ATA_DNXFER_FORCE_PIO0
:
3103 case ATA_DNXFER_FORCE_PIO
:
3112 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3114 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3118 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3119 snprintf(buf
, sizeof(buf
), "%s:%s",
3120 ata_mode_string(xfer_mask
),
3121 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3123 snprintf(buf
, sizeof(buf
), "%s",
3124 ata_mode_string(xfer_mask
));
3126 ata_dev_printk(dev
, KERN_WARNING
,
3127 "limiting speed to %s\n", buf
);
3130 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3136 static int ata_dev_set_mode(struct ata_device
*dev
)
3138 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3139 const char *dev_err_whine
= "";
3140 int ign_dev_err
= 0;
3141 unsigned int err_mask
;
3144 dev
->flags
&= ~ATA_DFLAG_PIO
;
3145 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3146 dev
->flags
|= ATA_DFLAG_PIO
;
3148 err_mask
= ata_dev_set_xfermode(dev
);
3150 if (err_mask
& ~AC_ERR_DEV
)
3154 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3155 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3156 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3160 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3161 /* Old CFA may refuse this command, which is just fine */
3162 if (ata_id_is_cfa(dev
->id
))
3164 /* Catch several broken garbage emulations plus some pre
3166 if (ata_id_major_version(dev
->id
) == 0 &&
3167 dev
->pio_mode
<= XFER_PIO_2
)
3169 /* Some very old devices and some bad newer ones fail
3170 any kind of SET_XFERMODE request but support PIO0-2
3171 timings and no IORDY */
3172 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3175 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3176 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3177 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3178 dev
->dma_mode
== XFER_MW_DMA_0
&&
3179 (dev
->id
[63] >> 8) & 1)
3182 /* if the device is actually configured correctly, ignore dev err */
3183 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3186 if (err_mask
& AC_ERR_DEV
) {
3190 dev_err_whine
= " (device error ignored)";
3193 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3194 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3196 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3197 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3203 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3204 "(err_mask=0x%x)\n", err_mask
);
3209 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3210 * @link: link on which timings will be programmed
3211 * @r_failed_dev: out parameter for failed device
3213 * Standard implementation of the function used to tune and set
3214 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3215 * ata_dev_set_mode() fails, pointer to the failing device is
3216 * returned in @r_failed_dev.
3219 * PCI/etc. bus probe sem.
3222 * 0 on success, negative errno otherwise
3225 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3227 struct ata_port
*ap
= link
->ap
;
3228 struct ata_device
*dev
;
3229 int rc
= 0, used_dma
= 0, found
= 0;
3231 /* step 1: calculate xfer_mask */
3232 ata_link_for_each_dev(dev
, link
) {
3233 unsigned long pio_mask
, dma_mask
;
3234 unsigned int mode_mask
;
3236 if (!ata_dev_enabled(dev
))
3239 mode_mask
= ATA_DMA_MASK_ATA
;
3240 if (dev
->class == ATA_DEV_ATAPI
)
3241 mode_mask
= ATA_DMA_MASK_ATAPI
;
3242 else if (ata_id_is_cfa(dev
->id
))
3243 mode_mask
= ATA_DMA_MASK_CFA
;
3245 ata_dev_xfermask(dev
);
3246 ata_force_xfermask(dev
);
3248 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3249 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3251 if (libata_dma_mask
& mode_mask
)
3252 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3256 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3257 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3260 if (dev
->dma_mode
!= 0xff)
3266 /* step 2: always set host PIO timings */
3267 ata_link_for_each_dev(dev
, link
) {
3268 if (!ata_dev_enabled(dev
))
3271 if (dev
->pio_mode
== 0xff) {
3272 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3277 dev
->xfer_mode
= dev
->pio_mode
;
3278 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3279 if (ap
->ops
->set_piomode
)
3280 ap
->ops
->set_piomode(ap
, dev
);
3283 /* step 3: set host DMA timings */
3284 ata_link_for_each_dev(dev
, link
) {
3285 if (!ata_dev_enabled(dev
) || dev
->dma_mode
== 0xff)
3288 dev
->xfer_mode
= dev
->dma_mode
;
3289 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3290 if (ap
->ops
->set_dmamode
)
3291 ap
->ops
->set_dmamode(ap
, dev
);
3294 /* step 4: update devices' xfer mode */
3295 ata_link_for_each_dev(dev
, link
) {
3296 /* don't update suspended devices' xfer mode */
3297 if (!ata_dev_enabled(dev
))
3300 rc
= ata_dev_set_mode(dev
);
3305 /* Record simplex status. If we selected DMA then the other
3306 * host channels are not permitted to do so.
3308 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3309 ap
->host
->simplex_claimed
= ap
;
3313 *r_failed_dev
= dev
;
3318 * ata_wait_ready - wait for link to become ready
3319 * @link: link to be waited on
3320 * @deadline: deadline jiffies for the operation
3321 * @check_ready: callback to check link readiness
3323 * Wait for @link to become ready. @check_ready should return
3324 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3325 * link doesn't seem to be occupied, other errno for other error
3328 * Transient -ENODEV conditions are allowed for
3329 * ATA_TMOUT_FF_WAIT.
3335 * 0 if @linke is ready before @deadline; otherwise, -errno.
3337 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3338 int (*check_ready
)(struct ata_link
*link
))
3340 unsigned long start
= jiffies
;
3341 unsigned long nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3344 if (time_after(nodev_deadline
, deadline
))
3345 nodev_deadline
= deadline
;
3348 unsigned long now
= jiffies
;
3351 ready
= tmp
= check_ready(link
);
3355 /* -ENODEV could be transient. Ignore -ENODEV if link
3356 * is online. Also, some SATA devices take a long
3357 * time to clear 0xff after reset. For example,
3358 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3359 * GoVault needs even more than that. Wait for
3360 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3362 * Note that some PATA controllers (pata_ali) explode
3363 * if status register is read more than once when
3364 * there's no device attached.
3366 if (ready
== -ENODEV
) {
3367 if (ata_link_online(link
))
3369 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3370 !ata_link_offline(link
) &&
3371 time_before(now
, nodev_deadline
))
3377 if (time_after(now
, deadline
))
3380 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3381 (deadline
- now
> 3 * HZ
)) {
3382 ata_link_printk(link
, KERN_WARNING
,
3383 "link is slow to respond, please be patient "
3384 "(ready=%d)\n", tmp
);
3393 * ata_wait_after_reset - wait for link to become ready after reset
3394 * @link: link to be waited on
3395 * @deadline: deadline jiffies for the operation
3396 * @check_ready: callback to check link readiness
3398 * Wait for @link to become ready after reset.
3404 * 0 if @linke is ready before @deadline; otherwise, -errno.
3406 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3407 int (*check_ready
)(struct ata_link
*link
))
3409 msleep(ATA_WAIT_AFTER_RESET
);
3411 return ata_wait_ready(link
, deadline
, check_ready
);
3415 * sata_link_debounce - debounce SATA phy status
3416 * @link: ATA link to debounce SATA phy status for
3417 * @params: timing parameters { interval, duratinon, timeout } in msec
3418 * @deadline: deadline jiffies for the operation
3420 * Make sure SStatus of @link reaches stable state, determined by
3421 * holding the same value where DET is not 1 for @duration polled
3422 * every @interval, before @timeout. Timeout constraints the
3423 * beginning of the stable state. Because DET gets stuck at 1 on
3424 * some controllers after hot unplugging, this functions waits
3425 * until timeout then returns 0 if DET is stable at 1.
3427 * @timeout is further limited by @deadline. The sooner of the
3431 * Kernel thread context (may sleep)
3434 * 0 on success, -errno on failure.
3436 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3437 unsigned long deadline
)
3439 unsigned long interval
= params
[0];
3440 unsigned long duration
= params
[1];
3441 unsigned long last_jiffies
, t
;
3445 t
= ata_deadline(jiffies
, params
[2]);
3446 if (time_before(t
, deadline
))
3449 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3454 last_jiffies
= jiffies
;
3458 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3464 if (cur
== 1 && time_before(jiffies
, deadline
))
3466 if (time_after(jiffies
,
3467 ata_deadline(last_jiffies
, duration
)))
3472 /* unstable, start over */
3474 last_jiffies
= jiffies
;
3476 /* Check deadline. If debouncing failed, return
3477 * -EPIPE to tell upper layer to lower link speed.
3479 if (time_after(jiffies
, deadline
))
3485 * sata_link_resume - resume SATA link
3486 * @link: ATA link to resume SATA
3487 * @params: timing parameters { interval, duratinon, timeout } in msec
3488 * @deadline: deadline jiffies for the operation
3490 * Resume SATA phy @link and debounce it.
3493 * Kernel thread context (may sleep)
3496 * 0 on success, -errno on failure.
3498 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3499 unsigned long deadline
)
3501 u32 scontrol
, serror
;
3504 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3507 scontrol
= (scontrol
& 0x0f0) | 0x300;
3509 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3512 /* Some PHYs react badly if SStatus is pounded immediately
3513 * after resuming. Delay 200ms before debouncing.
3517 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3520 /* clear SError, some PHYs require this even for SRST to work */
3521 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3522 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3524 return rc
!= -EINVAL
? rc
: 0;
3528 * ata_std_prereset - prepare for reset
3529 * @link: ATA link to be reset
3530 * @deadline: deadline jiffies for the operation
3532 * @link is about to be reset. Initialize it. Failure from
3533 * prereset makes libata abort whole reset sequence and give up
3534 * that port, so prereset should be best-effort. It does its
3535 * best to prepare for reset sequence but if things go wrong, it
3536 * should just whine, not fail.
3539 * Kernel thread context (may sleep)
3542 * 0 on success, -errno otherwise.
3544 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3546 struct ata_port
*ap
= link
->ap
;
3547 struct ata_eh_context
*ehc
= &link
->eh_context
;
3548 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3551 /* if we're about to do hardreset, nothing more to do */
3552 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3555 /* if SATA, resume link */
3556 if (ap
->flags
& ATA_FLAG_SATA
) {
3557 rc
= sata_link_resume(link
, timing
, deadline
);
3558 /* whine about phy resume failure but proceed */
3559 if (rc
&& rc
!= -EOPNOTSUPP
)
3560 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3561 "link for reset (errno=%d)\n", rc
);
3564 /* no point in trying softreset on offline link */
3565 if (ata_link_offline(link
))
3566 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3572 * sata_link_hardreset - reset link via SATA phy reset
3573 * @link: link to reset
3574 * @timing: timing parameters { interval, duratinon, timeout } in msec
3575 * @deadline: deadline jiffies for the operation
3576 * @online: optional out parameter indicating link onlineness
3577 * @check_ready: optional callback to check link readiness
3579 * SATA phy-reset @link using DET bits of SControl register.
3580 * After hardreset, link readiness is waited upon using
3581 * ata_wait_ready() if @check_ready is specified. LLDs are
3582 * allowed to not specify @check_ready and wait itself after this
3583 * function returns. Device classification is LLD's
3586 * *@online is set to one iff reset succeeded and @link is online
3590 * Kernel thread context (may sleep)
3593 * 0 on success, -errno otherwise.
3595 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3596 unsigned long deadline
,
3597 bool *online
, int (*check_ready
)(struct ata_link
*))
3607 if (sata_set_spd_needed(link
)) {
3608 /* SATA spec says nothing about how to reconfigure
3609 * spd. To be on the safe side, turn off phy during
3610 * reconfiguration. This works for at least ICH7 AHCI
3613 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3616 scontrol
= (scontrol
& 0x0f0) | 0x304;
3618 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3624 /* issue phy wake/reset */
3625 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3628 scontrol
= (scontrol
& 0x0f0) | 0x301;
3630 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3633 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3634 * 10.4.2 says at least 1 ms.
3638 /* bring link back */
3639 rc
= sata_link_resume(link
, timing
, deadline
);
3642 /* if link is offline nothing more to do */
3643 if (ata_link_offline(link
))
3646 /* Link is online. From this point, -ENODEV too is an error. */
3650 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3651 /* If PMP is supported, we have to do follow-up SRST.
3652 * Some PMPs don't send D2H Reg FIS after hardreset if
3653 * the first port is empty. Wait only for
3654 * ATA_TMOUT_PMP_SRST_WAIT.
3657 unsigned long pmp_deadline
;
3659 pmp_deadline
= ata_deadline(jiffies
,
3660 ATA_TMOUT_PMP_SRST_WAIT
);
3661 if (time_after(pmp_deadline
, deadline
))
3662 pmp_deadline
= deadline
;
3663 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3671 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3673 if (rc
&& rc
!= -EAGAIN
) {
3674 /* online is set iff link is online && reset succeeded */
3677 ata_link_printk(link
, KERN_ERR
,
3678 "COMRESET failed (errno=%d)\n", rc
);
3680 DPRINTK("EXIT, rc=%d\n", rc
);
3685 * sata_std_hardreset - COMRESET w/o waiting or classification
3686 * @link: link to reset
3687 * @class: resulting class of attached device
3688 * @deadline: deadline jiffies for the operation
3690 * Standard SATA COMRESET w/o waiting or classification.
3693 * Kernel thread context (may sleep)
3696 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3698 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3699 unsigned long deadline
)
3701 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3706 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3707 return online
? -EAGAIN
: rc
;
3711 * ata_std_postreset - standard postreset callback
3712 * @link: the target ata_link
3713 * @classes: classes of attached devices
3715 * This function is invoked after a successful reset. Note that
3716 * the device might have been reset more than once using
3717 * different reset methods before postreset is invoked.
3720 * Kernel thread context (may sleep)
3722 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3728 /* reset complete, clear SError */
3729 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3730 sata_scr_write(link
, SCR_ERROR
, serror
);
3732 /* print link status */
3733 sata_print_link_status(link
);
3739 * ata_dev_same_device - Determine whether new ID matches configured device
3740 * @dev: device to compare against
3741 * @new_class: class of the new device
3742 * @new_id: IDENTIFY page of the new device
3744 * Compare @new_class and @new_id against @dev and determine
3745 * whether @dev is the device indicated by @new_class and
3752 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3754 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3757 const u16
*old_id
= dev
->id
;
3758 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3759 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3761 if (dev
->class != new_class
) {
3762 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3763 dev
->class, new_class
);
3767 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3768 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3769 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3770 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3772 if (strcmp(model
[0], model
[1])) {
3773 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3774 "'%s' != '%s'\n", model
[0], model
[1]);
3778 if (strcmp(serial
[0], serial
[1])) {
3779 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3780 "'%s' != '%s'\n", serial
[0], serial
[1]);
3788 * ata_dev_reread_id - Re-read IDENTIFY data
3789 * @dev: target ATA device
3790 * @readid_flags: read ID flags
3792 * Re-read IDENTIFY page and make sure @dev is still attached to
3796 * Kernel thread context (may sleep)
3799 * 0 on success, negative errno otherwise
3801 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3803 unsigned int class = dev
->class;
3804 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3808 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3812 /* is the device still there? */
3813 if (!ata_dev_same_device(dev
, class, id
))
3816 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3821 * ata_dev_revalidate - Revalidate ATA device
3822 * @dev: device to revalidate
3823 * @new_class: new class code
3824 * @readid_flags: read ID flags
3826 * Re-read IDENTIFY page, make sure @dev is still attached to the
3827 * port and reconfigure it according to the new IDENTIFY page.
3830 * Kernel thread context (may sleep)
3833 * 0 on success, negative errno otherwise
3835 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3836 unsigned int readid_flags
)
3838 u64 n_sectors
= dev
->n_sectors
;
3841 if (!ata_dev_enabled(dev
))
3844 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3845 if (ata_class_enabled(new_class
) &&
3846 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3847 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3848 dev
->class, new_class
);
3854 rc
= ata_dev_reread_id(dev
, readid_flags
);
3858 /* configure device according to the new ID */
3859 rc
= ata_dev_configure(dev
);
3863 /* verify n_sectors hasn't changed */
3864 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3865 dev
->n_sectors
!= n_sectors
) {
3866 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3868 (unsigned long long)n_sectors
,
3869 (unsigned long long)dev
->n_sectors
);
3871 /* restore original n_sectors */
3872 dev
->n_sectors
= n_sectors
;
3881 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3885 struct ata_blacklist_entry
{
3886 const char *model_num
;
3887 const char *model_rev
;
3888 unsigned long horkage
;
3891 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3892 /* Devices with DMA related problems under Linux */
3893 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3894 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3895 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3896 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3897 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3898 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3899 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3900 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3901 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3902 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3903 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3904 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3905 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3906 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3907 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3908 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3909 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3910 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3911 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3912 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3913 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3914 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3915 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3916 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3917 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3918 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3919 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3920 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3921 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3922 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3923 /* Odd clown on sil3726/4726 PMPs */
3924 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
3926 /* Weird ATAPI devices */
3927 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3929 /* Devices we expect to fail diagnostics */
3931 /* Devices where NCQ should be avoided */
3933 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3934 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3935 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3936 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3938 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3939 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3940 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3941 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3943 /* Blacklist entries taken from Silicon Image 3124/3132
3944 Windows driver .inf file - also several Linux problem reports */
3945 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3946 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3947 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3949 /* devices which puke on READ_NATIVE_MAX */
3950 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3951 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3952 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3953 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3955 /* Devices which report 1 sector over size HPA */
3956 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3957 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3958 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3960 /* Devices which get the IVB wrong */
3961 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
3962 /* Maybe we should just blacklist TSSTcorp... */
3963 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB
, },
3964 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB
, },
3965 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
3966 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
3967 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
3968 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
3974 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
3980 * check for trailing wildcard: *\0
3982 p
= strchr(patt
, wildchar
);
3983 if (p
&& ((*(p
+ 1)) == 0))
3994 return strncmp(patt
, name
, len
);
3997 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3999 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4000 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4001 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4003 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4004 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4006 while (ad
->model_num
) {
4007 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4008 if (ad
->model_rev
== NULL
)
4010 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4018 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4020 /* We don't support polling DMA.
4021 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4022 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4024 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4025 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4027 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4031 * ata_is_40wire - check drive side detection
4034 * Perform drive side detection decoding, allowing for device vendors
4035 * who can't follow the documentation.
4038 static int ata_is_40wire(struct ata_device
*dev
)
4040 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4041 return ata_drive_40wire_relaxed(dev
->id
);
4042 return ata_drive_40wire(dev
->id
);
4046 * cable_is_40wire - 40/80/SATA decider
4047 * @ap: port to consider
4049 * This function encapsulates the policy for speed management
4050 * in one place. At the moment we don't cache the result but
4051 * there is a good case for setting ap->cbl to the result when
4052 * we are called with unknown cables (and figuring out if it
4053 * impacts hotplug at all).
4055 * Return 1 if the cable appears to be 40 wire.
4058 static int cable_is_40wire(struct ata_port
*ap
)
4060 struct ata_link
*link
;
4061 struct ata_device
*dev
;
4063 /* If the controller thinks we are 40 wire, we are */
4064 if (ap
->cbl
== ATA_CBL_PATA40
)
4066 /* If the controller thinks we are 80 wire, we are */
4067 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4069 /* If the system is known to be 40 wire short cable (eg laptop),
4070 then we allow 80 wire modes even if the drive isn't sure */
4071 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4073 /* If the controller doesn't know we scan
4075 - Note: We look for all 40 wire detects at this point.
4076 Any 80 wire detect is taken to be 80 wire cable
4078 - In many setups only the one drive (slave if present)
4079 will give a valid detect
4080 - If you have a non detect capable drive you don't
4081 want it to colour the choice
4083 ata_port_for_each_link(link
, ap
) {
4084 ata_link_for_each_dev(dev
, link
) {
4085 if (!ata_is_40wire(dev
))
4093 * ata_dev_xfermask - Compute supported xfermask of the given device
4094 * @dev: Device to compute xfermask for
4096 * Compute supported xfermask of @dev and store it in
4097 * dev->*_mask. This function is responsible for applying all
4098 * known limits including host controller limits, device
4104 static void ata_dev_xfermask(struct ata_device
*dev
)
4106 struct ata_link
*link
= dev
->link
;
4107 struct ata_port
*ap
= link
->ap
;
4108 struct ata_host
*host
= ap
->host
;
4109 unsigned long xfer_mask
;
4111 /* controller modes available */
4112 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4113 ap
->mwdma_mask
, ap
->udma_mask
);
4115 /* drive modes available */
4116 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4117 dev
->mwdma_mask
, dev
->udma_mask
);
4118 xfer_mask
&= ata_id_xfermask(dev
->id
);
4121 * CFA Advanced TrueIDE timings are not allowed on a shared
4124 if (ata_dev_pair(dev
)) {
4125 /* No PIO5 or PIO6 */
4126 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4127 /* No MWDMA3 or MWDMA 4 */
4128 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4131 if (ata_dma_blacklisted(dev
)) {
4132 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4133 ata_dev_printk(dev
, KERN_WARNING
,
4134 "device is on DMA blacklist, disabling DMA\n");
4137 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4138 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4139 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4140 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4141 "other device, disabling DMA\n");
4144 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4145 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4147 if (ap
->ops
->mode_filter
)
4148 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4150 /* Apply cable rule here. Don't apply it early because when
4151 * we handle hot plug the cable type can itself change.
4152 * Check this last so that we know if the transfer rate was
4153 * solely limited by the cable.
4154 * Unknown or 80 wire cables reported host side are checked
4155 * drive side as well. Cases where we know a 40wire cable
4156 * is used safely for 80 are not checked here.
4158 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4159 /* UDMA/44 or higher would be available */
4160 if (cable_is_40wire(ap
)) {
4161 ata_dev_printk(dev
, KERN_WARNING
,
4162 "limited to UDMA/33 due to 40-wire cable\n");
4163 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4166 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4167 &dev
->mwdma_mask
, &dev
->udma_mask
);
4171 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4172 * @dev: Device to which command will be sent
4174 * Issue SET FEATURES - XFER MODE command to device @dev
4178 * PCI/etc. bus probe sem.
4181 * 0 on success, AC_ERR_* mask otherwise.
4184 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4186 struct ata_taskfile tf
;
4187 unsigned int err_mask
;
4189 /* set up set-features taskfile */
4190 DPRINTK("set features - xfer mode\n");
4192 /* Some controllers and ATAPI devices show flaky interrupt
4193 * behavior after setting xfer mode. Use polling instead.
4195 ata_tf_init(dev
, &tf
);
4196 tf
.command
= ATA_CMD_SET_FEATURES
;
4197 tf
.feature
= SETFEATURES_XFER
;
4198 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4199 tf
.protocol
= ATA_PROT_NODATA
;
4200 /* If we are using IORDY we must send the mode setting command */
4201 if (ata_pio_need_iordy(dev
))
4202 tf
.nsect
= dev
->xfer_mode
;
4203 /* If the device has IORDY and the controller does not - turn it off */
4204 else if (ata_id_has_iordy(dev
->id
))
4206 else /* In the ancient relic department - skip all of this */
4209 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4211 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4215 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4216 * @dev: Device to which command will be sent
4217 * @enable: Whether to enable or disable the feature
4218 * @feature: The sector count represents the feature to set
4220 * Issue SET FEATURES - SATA FEATURES command to device @dev
4221 * on port @ap with sector count
4224 * PCI/etc. bus probe sem.
4227 * 0 on success, AC_ERR_* mask otherwise.
4229 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4232 struct ata_taskfile tf
;
4233 unsigned int err_mask
;
4235 /* set up set-features taskfile */
4236 DPRINTK("set features - SATA features\n");
4238 ata_tf_init(dev
, &tf
);
4239 tf
.command
= ATA_CMD_SET_FEATURES
;
4240 tf
.feature
= enable
;
4241 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4242 tf
.protocol
= ATA_PROT_NODATA
;
4245 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4247 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4252 * ata_dev_init_params - Issue INIT DEV PARAMS command
4253 * @dev: Device to which command will be sent
4254 * @heads: Number of heads (taskfile parameter)
4255 * @sectors: Number of sectors (taskfile parameter)
4258 * Kernel thread context (may sleep)
4261 * 0 on success, AC_ERR_* mask otherwise.
4263 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4264 u16 heads
, u16 sectors
)
4266 struct ata_taskfile tf
;
4267 unsigned int err_mask
;
4269 /* Number of sectors per track 1-255. Number of heads 1-16 */
4270 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4271 return AC_ERR_INVALID
;
4273 /* set up init dev params taskfile */
4274 DPRINTK("init dev params \n");
4276 ata_tf_init(dev
, &tf
);
4277 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4278 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4279 tf
.protocol
= ATA_PROT_NODATA
;
4281 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4283 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4284 /* A clean abort indicates an original or just out of spec drive
4285 and we should continue as we issue the setup based on the
4286 drive reported working geometry */
4287 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4290 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4295 * ata_sg_clean - Unmap DMA memory associated with command
4296 * @qc: Command containing DMA memory to be released
4298 * Unmap all mapped DMA memory associated with this command.
4301 * spin_lock_irqsave(host lock)
4303 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4305 struct ata_port
*ap
= qc
->ap
;
4306 struct scatterlist
*sg
= qc
->sg
;
4307 int dir
= qc
->dma_dir
;
4309 WARN_ON(sg
== NULL
);
4311 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4314 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4316 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4321 * atapi_check_dma - Check whether ATAPI DMA can be supported
4322 * @qc: Metadata associated with taskfile to check
4324 * Allow low-level driver to filter ATA PACKET commands, returning
4325 * a status indicating whether or not it is OK to use DMA for the
4326 * supplied PACKET command.
4329 * spin_lock_irqsave(host lock)
4331 * RETURNS: 0 when ATAPI DMA can be used
4334 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4336 struct ata_port
*ap
= qc
->ap
;
4338 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4339 * few ATAPI devices choke on such DMA requests.
4341 if (unlikely(qc
->nbytes
& 15))
4344 if (ap
->ops
->check_atapi_dma
)
4345 return ap
->ops
->check_atapi_dma(qc
);
4351 * ata_std_qc_defer - Check whether a qc needs to be deferred
4352 * @qc: ATA command in question
4354 * Non-NCQ commands cannot run with any other command, NCQ or
4355 * not. As upper layer only knows the queue depth, we are
4356 * responsible for maintaining exclusion. This function checks
4357 * whether a new command @qc can be issued.
4360 * spin_lock_irqsave(host lock)
4363 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4365 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4367 struct ata_link
*link
= qc
->dev
->link
;
4369 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4370 if (!ata_tag_valid(link
->active_tag
))
4373 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4377 return ATA_DEFER_LINK
;
4380 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4383 * ata_sg_init - Associate command with scatter-gather table.
4384 * @qc: Command to be associated
4385 * @sg: Scatter-gather table.
4386 * @n_elem: Number of elements in s/g table.
4388 * Initialize the data-related elements of queued_cmd @qc
4389 * to point to a scatter-gather table @sg, containing @n_elem
4393 * spin_lock_irqsave(host lock)
4395 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4396 unsigned int n_elem
)
4399 qc
->n_elem
= n_elem
;
4404 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4405 * @qc: Command with scatter-gather table to be mapped.
4407 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4410 * spin_lock_irqsave(host lock)
4413 * Zero on success, negative on error.
4416 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4418 struct ata_port
*ap
= qc
->ap
;
4419 unsigned int n_elem
;
4421 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4423 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4427 DPRINTK("%d sg elements mapped\n", n_elem
);
4429 qc
->n_elem
= n_elem
;
4430 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4436 * swap_buf_le16 - swap halves of 16-bit words in place
4437 * @buf: Buffer to swap
4438 * @buf_words: Number of 16-bit words in buffer.
4440 * Swap halves of 16-bit words if needed to convert from
4441 * little-endian byte order to native cpu byte order, or
4445 * Inherited from caller.
4447 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4452 for (i
= 0; i
< buf_words
; i
++)
4453 buf
[i
] = le16_to_cpu(buf
[i
]);
4454 #endif /* __BIG_ENDIAN */
4458 * ata_qc_new - Request an available ATA command, for queueing
4459 * @ap: Port associated with device @dev
4460 * @dev: Device from whom we request an available command structure
4466 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4468 struct ata_queued_cmd
*qc
= NULL
;
4471 /* no command while frozen */
4472 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4475 /* the last tag is reserved for internal command. */
4476 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4477 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4478 qc
= __ata_qc_from_tag(ap
, i
);
4489 * ata_qc_new_init - Request an available ATA command, and initialize it
4490 * @dev: Device from whom we request an available command structure
4496 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4498 struct ata_port
*ap
= dev
->link
->ap
;
4499 struct ata_queued_cmd
*qc
;
4501 qc
= ata_qc_new(ap
);
4514 * ata_qc_free - free unused ata_queued_cmd
4515 * @qc: Command to complete
4517 * Designed to free unused ata_queued_cmd object
4518 * in case something prevents using it.
4521 * spin_lock_irqsave(host lock)
4523 void ata_qc_free(struct ata_queued_cmd
*qc
)
4525 struct ata_port
*ap
= qc
->ap
;
4528 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4532 if (likely(ata_tag_valid(tag
))) {
4533 qc
->tag
= ATA_TAG_POISON
;
4534 clear_bit(tag
, &ap
->qc_allocated
);
4538 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4540 struct ata_port
*ap
= qc
->ap
;
4541 struct ata_link
*link
= qc
->dev
->link
;
4543 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4544 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4546 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4549 /* command should be marked inactive atomically with qc completion */
4550 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4551 link
->sactive
&= ~(1 << qc
->tag
);
4553 ap
->nr_active_links
--;
4555 link
->active_tag
= ATA_TAG_POISON
;
4556 ap
->nr_active_links
--;
4559 /* clear exclusive status */
4560 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4561 ap
->excl_link
== link
))
4562 ap
->excl_link
= NULL
;
4564 /* atapi: mark qc as inactive to prevent the interrupt handler
4565 * from completing the command twice later, before the error handler
4566 * is called. (when rc != 0 and atapi request sense is needed)
4568 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4569 ap
->qc_active
&= ~(1 << qc
->tag
);
4571 /* call completion callback */
4572 qc
->complete_fn(qc
);
4575 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4577 struct ata_port
*ap
= qc
->ap
;
4579 qc
->result_tf
.flags
= qc
->tf
.flags
;
4580 ap
->ops
->qc_fill_rtf(qc
);
4583 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4585 struct ata_device
*dev
= qc
->dev
;
4587 if (ata_tag_internal(qc
->tag
))
4590 if (ata_is_nodata(qc
->tf
.protocol
))
4593 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4596 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4600 * ata_qc_complete - Complete an active ATA command
4601 * @qc: Command to complete
4602 * @err_mask: ATA Status register contents
4604 * Indicate to the mid and upper layers that an ATA
4605 * command has completed, with either an ok or not-ok status.
4608 * spin_lock_irqsave(host lock)
4610 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4612 struct ata_port
*ap
= qc
->ap
;
4614 /* XXX: New EH and old EH use different mechanisms to
4615 * synchronize EH with regular execution path.
4617 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4618 * Normal execution path is responsible for not accessing a
4619 * failed qc. libata core enforces the rule by returning NULL
4620 * from ata_qc_from_tag() for failed qcs.
4622 * Old EH depends on ata_qc_complete() nullifying completion
4623 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4624 * not synchronize with interrupt handler. Only PIO task is
4627 if (ap
->ops
->error_handler
) {
4628 struct ata_device
*dev
= qc
->dev
;
4629 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4631 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4633 if (unlikely(qc
->err_mask
))
4634 qc
->flags
|= ATA_QCFLAG_FAILED
;
4636 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4637 if (!ata_tag_internal(qc
->tag
)) {
4638 /* always fill result TF for failed qc */
4640 ata_qc_schedule_eh(qc
);
4645 /* read result TF if requested */
4646 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4649 /* Some commands need post-processing after successful
4652 switch (qc
->tf
.command
) {
4653 case ATA_CMD_SET_FEATURES
:
4654 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4655 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4658 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4659 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4660 /* revalidate device */
4661 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4662 ata_port_schedule_eh(ap
);
4666 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4670 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4671 ata_verify_xfer(qc
);
4673 __ata_qc_complete(qc
);
4675 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4678 /* read result TF if failed or requested */
4679 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4682 __ata_qc_complete(qc
);
4687 * ata_qc_complete_multiple - Complete multiple qcs successfully
4688 * @ap: port in question
4689 * @qc_active: new qc_active mask
4691 * Complete in-flight commands. This functions is meant to be
4692 * called from low-level driver's interrupt routine to complete
4693 * requests normally. ap->qc_active and @qc_active is compared
4694 * and commands are completed accordingly.
4697 * spin_lock_irqsave(host lock)
4700 * Number of completed commands on success, -errno otherwise.
4702 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
4708 done_mask
= ap
->qc_active
^ qc_active
;
4710 if (unlikely(done_mask
& qc_active
)) {
4711 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4712 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4716 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4717 struct ata_queued_cmd
*qc
;
4719 if (!(done_mask
& (1 << i
)))
4722 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4723 ata_qc_complete(qc
);
4732 * ata_qc_issue - issue taskfile to device
4733 * @qc: command to issue to device
4735 * Prepare an ATA command to submission to device.
4736 * This includes mapping the data into a DMA-able
4737 * area, filling in the S/G table, and finally
4738 * writing the taskfile to hardware, starting the command.
4741 * spin_lock_irqsave(host lock)
4743 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4745 struct ata_port
*ap
= qc
->ap
;
4746 struct ata_link
*link
= qc
->dev
->link
;
4747 u8 prot
= qc
->tf
.protocol
;
4749 /* Make sure only one non-NCQ command is outstanding. The
4750 * check is skipped for old EH because it reuses active qc to
4751 * request ATAPI sense.
4753 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4755 if (ata_is_ncq(prot
)) {
4756 WARN_ON(link
->sactive
& (1 << qc
->tag
));
4759 ap
->nr_active_links
++;
4760 link
->sactive
|= 1 << qc
->tag
;
4762 WARN_ON(link
->sactive
);
4764 ap
->nr_active_links
++;
4765 link
->active_tag
= qc
->tag
;
4768 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4769 ap
->qc_active
|= 1 << qc
->tag
;
4771 /* We guarantee to LLDs that they will have at least one
4772 * non-zero sg if the command is a data command.
4774 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
4776 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4777 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4778 if (ata_sg_setup(qc
))
4781 /* if device is sleeping, schedule reset and abort the link */
4782 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4783 link
->eh_info
.action
|= ATA_EH_RESET
;
4784 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4785 ata_link_abort(link
);
4789 ap
->ops
->qc_prep(qc
);
4791 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4792 if (unlikely(qc
->err_mask
))
4797 qc
->err_mask
|= AC_ERR_SYSTEM
;
4799 ata_qc_complete(qc
);
4803 * sata_scr_valid - test whether SCRs are accessible
4804 * @link: ATA link to test SCR accessibility for
4806 * Test whether SCRs are accessible for @link.
4812 * 1 if SCRs are accessible, 0 otherwise.
4814 int sata_scr_valid(struct ata_link
*link
)
4816 struct ata_port
*ap
= link
->ap
;
4818 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
4822 * sata_scr_read - read SCR register of the specified port
4823 * @link: ATA link to read SCR for
4825 * @val: Place to store read value
4827 * Read SCR register @reg of @link into *@val. This function is
4828 * guaranteed to succeed if @link is ap->link, the cable type of
4829 * the port is SATA and the port implements ->scr_read.
4832 * None if @link is ap->link. Kernel thread context otherwise.
4835 * 0 on success, negative errno on failure.
4837 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
4839 if (ata_is_host_link(link
)) {
4840 struct ata_port
*ap
= link
->ap
;
4842 if (sata_scr_valid(link
))
4843 return ap
->ops
->scr_read(ap
, reg
, val
);
4847 return sata_pmp_scr_read(link
, reg
, val
);
4851 * sata_scr_write - write SCR register of the specified port
4852 * @link: ATA link to write SCR for
4853 * @reg: SCR to write
4854 * @val: value to write
4856 * Write @val to SCR register @reg of @link. This function is
4857 * guaranteed to succeed if @link is ap->link, the cable type of
4858 * the port is SATA and the port implements ->scr_read.
4861 * None if @link is ap->link. Kernel thread context otherwise.
4864 * 0 on success, negative errno on failure.
4866 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
4868 if (ata_is_host_link(link
)) {
4869 struct ata_port
*ap
= link
->ap
;
4871 if (sata_scr_valid(link
))
4872 return ap
->ops
->scr_write(ap
, reg
, val
);
4876 return sata_pmp_scr_write(link
, reg
, val
);
4880 * sata_scr_write_flush - write SCR register of the specified port and flush
4881 * @link: ATA link to write SCR for
4882 * @reg: SCR to write
4883 * @val: value to write
4885 * This function is identical to sata_scr_write() except that this
4886 * function performs flush after writing to the register.
4889 * None if @link is ap->link. Kernel thread context otherwise.
4892 * 0 on success, negative errno on failure.
4894 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
4896 if (ata_is_host_link(link
)) {
4897 struct ata_port
*ap
= link
->ap
;
4900 if (sata_scr_valid(link
)) {
4901 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
4903 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
4909 return sata_pmp_scr_write(link
, reg
, val
);
4913 * ata_link_online - test whether the given link is online
4914 * @link: ATA link to test
4916 * Test whether @link is online. Note that this function returns
4917 * 0 if online status of @link cannot be obtained, so
4918 * ata_link_online(link) != !ata_link_offline(link).
4924 * 1 if the port online status is available and online.
4926 int ata_link_online(struct ata_link
*link
)
4930 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4931 (sstatus
& 0xf) == 0x3)
4937 * ata_link_offline - test whether the given link is offline
4938 * @link: ATA link to test
4940 * Test whether @link is offline. Note that this function
4941 * returns 0 if offline status of @link cannot be obtained, so
4942 * ata_link_online(link) != !ata_link_offline(link).
4948 * 1 if the port offline status is available and offline.
4950 int ata_link_offline(struct ata_link
*link
)
4954 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4955 (sstatus
& 0xf) != 0x3)
4961 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
4962 unsigned int action
, unsigned int ehi_flags
,
4965 unsigned long flags
;
4968 for (i
= 0; i
< host
->n_ports
; i
++) {
4969 struct ata_port
*ap
= host
->ports
[i
];
4970 struct ata_link
*link
;
4972 /* Previous resume operation might still be in
4973 * progress. Wait for PM_PENDING to clear.
4975 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
4976 ata_port_wait_eh(ap
);
4977 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4980 /* request PM ops to EH */
4981 spin_lock_irqsave(ap
->lock
, flags
);
4986 ap
->pm_result
= &rc
;
4989 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
4990 __ata_port_for_each_link(link
, ap
) {
4991 link
->eh_info
.action
|= action
;
4992 link
->eh_info
.flags
|= ehi_flags
;
4995 ata_port_schedule_eh(ap
);
4997 spin_unlock_irqrestore(ap
->lock
, flags
);
4999 /* wait and check result */
5001 ata_port_wait_eh(ap
);
5002 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5012 * ata_host_suspend - suspend host
5013 * @host: host to suspend
5016 * Suspend @host. Actual operation is performed by EH. This
5017 * function requests EH to perform PM operations and waits for EH
5021 * Kernel thread context (may sleep).
5024 * 0 on success, -errno on failure.
5026 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5031 * disable link pm on all ports before requesting
5034 ata_lpm_enable(host
);
5036 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5038 host
->dev
->power
.power_state
= mesg
;
5043 * ata_host_resume - resume host
5044 * @host: host to resume
5046 * Resume @host. Actual operation is performed by EH. This
5047 * function requests EH to perform PM operations and returns.
5048 * Note that all resume operations are performed parallely.
5051 * Kernel thread context (may sleep).
5053 void ata_host_resume(struct ata_host
*host
)
5055 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
5056 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5057 host
->dev
->power
.power_state
= PMSG_ON
;
5059 /* reenable link pm */
5060 ata_lpm_disable(host
);
5065 * ata_port_start - Set port up for dma.
5066 * @ap: Port to initialize
5068 * Called just after data structures for each port are
5069 * initialized. Allocates space for PRD table.
5071 * May be used as the port_start() entry in ata_port_operations.
5074 * Inherited from caller.
5076 int ata_port_start(struct ata_port
*ap
)
5078 struct device
*dev
= ap
->dev
;
5080 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5089 * ata_dev_init - Initialize an ata_device structure
5090 * @dev: Device structure to initialize
5092 * Initialize @dev in preparation for probing.
5095 * Inherited from caller.
5097 void ata_dev_init(struct ata_device
*dev
)
5099 struct ata_link
*link
= dev
->link
;
5100 struct ata_port
*ap
= link
->ap
;
5101 unsigned long flags
;
5103 /* SATA spd limit is bound to the first device */
5104 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5107 /* High bits of dev->flags are used to record warm plug
5108 * requests which occur asynchronously. Synchronize using
5111 spin_lock_irqsave(ap
->lock
, flags
);
5112 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5114 spin_unlock_irqrestore(ap
->lock
, flags
);
5116 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5117 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5118 dev
->pio_mask
= UINT_MAX
;
5119 dev
->mwdma_mask
= UINT_MAX
;
5120 dev
->udma_mask
= UINT_MAX
;
5124 * ata_link_init - Initialize an ata_link structure
5125 * @ap: ATA port link is attached to
5126 * @link: Link structure to initialize
5127 * @pmp: Port multiplier port number
5132 * Kernel thread context (may sleep)
5134 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5138 /* clear everything except for devices */
5139 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
5143 link
->active_tag
= ATA_TAG_POISON
;
5144 link
->hw_sata_spd_limit
= UINT_MAX
;
5146 /* can't use iterator, ap isn't initialized yet */
5147 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5148 struct ata_device
*dev
= &link
->device
[i
];
5151 dev
->devno
= dev
- link
->device
;
5157 * sata_link_init_spd - Initialize link->sata_spd_limit
5158 * @link: Link to configure sata_spd_limit for
5160 * Initialize @link->[hw_]sata_spd_limit to the currently
5164 * Kernel thread context (may sleep).
5167 * 0 on success, -errno on failure.
5169 int sata_link_init_spd(struct ata_link
*link
)
5175 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
5179 spd
= (scontrol
>> 4) & 0xf;
5181 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5183 ata_force_spd_limit(link
);
5185 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5191 * ata_port_alloc - allocate and initialize basic ATA port resources
5192 * @host: ATA host this allocated port belongs to
5194 * Allocate and initialize basic ATA port resources.
5197 * Allocate ATA port on success, NULL on failure.
5200 * Inherited from calling layer (may sleep).
5202 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5204 struct ata_port
*ap
;
5208 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5212 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5213 ap
->lock
= &host
->lock
;
5214 ap
->flags
= ATA_FLAG_DISABLED
;
5216 ap
->ctl
= ATA_DEVCTL_OBS
;
5218 ap
->dev
= host
->dev
;
5219 ap
->last_ctl
= 0xFF;
5221 #if defined(ATA_VERBOSE_DEBUG)
5222 /* turn on all debugging levels */
5223 ap
->msg_enable
= 0x00FF;
5224 #elif defined(ATA_DEBUG)
5225 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5227 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5230 #ifdef CONFIG_ATA_SFF
5231 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
5233 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5234 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5235 INIT_LIST_HEAD(&ap
->eh_done_q
);
5236 init_waitqueue_head(&ap
->eh_wait_q
);
5237 init_timer_deferrable(&ap
->fastdrain_timer
);
5238 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5239 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5241 ap
->cbl
= ATA_CBL_NONE
;
5243 ata_link_init(ap
, &ap
->link
, 0);
5246 ap
->stats
.unhandled_irq
= 1;
5247 ap
->stats
.idle_irq
= 1;
5252 static void ata_host_release(struct device
*gendev
, void *res
)
5254 struct ata_host
*host
= dev_get_drvdata(gendev
);
5257 for (i
= 0; i
< host
->n_ports
; i
++) {
5258 struct ata_port
*ap
= host
->ports
[i
];
5264 scsi_host_put(ap
->scsi_host
);
5266 kfree(ap
->pmp_link
);
5268 host
->ports
[i
] = NULL
;
5271 dev_set_drvdata(gendev
, NULL
);
5275 * ata_host_alloc - allocate and init basic ATA host resources
5276 * @dev: generic device this host is associated with
5277 * @max_ports: maximum number of ATA ports associated with this host
5279 * Allocate and initialize basic ATA host resources. LLD calls
5280 * this function to allocate a host, initializes it fully and
5281 * attaches it using ata_host_register().
5283 * @max_ports ports are allocated and host->n_ports is
5284 * initialized to @max_ports. The caller is allowed to decrease
5285 * host->n_ports before calling ata_host_register(). The unused
5286 * ports will be automatically freed on registration.
5289 * Allocate ATA host on success, NULL on failure.
5292 * Inherited from calling layer (may sleep).
5294 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5296 struct ata_host
*host
;
5302 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5305 /* alloc a container for our list of ATA ports (buses) */
5306 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5307 /* alloc a container for our list of ATA ports (buses) */
5308 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5312 devres_add(dev
, host
);
5313 dev_set_drvdata(dev
, host
);
5315 spin_lock_init(&host
->lock
);
5317 host
->n_ports
= max_ports
;
5319 /* allocate ports bound to this host */
5320 for (i
= 0; i
< max_ports
; i
++) {
5321 struct ata_port
*ap
;
5323 ap
= ata_port_alloc(host
);
5328 host
->ports
[i
] = ap
;
5331 devres_remove_group(dev
, NULL
);
5335 devres_release_group(dev
, NULL
);
5340 * ata_host_alloc_pinfo - alloc host and init with port_info array
5341 * @dev: generic device this host is associated with
5342 * @ppi: array of ATA port_info to initialize host with
5343 * @n_ports: number of ATA ports attached to this host
5345 * Allocate ATA host and initialize with info from @ppi. If NULL
5346 * terminated, @ppi may contain fewer entries than @n_ports. The
5347 * last entry will be used for the remaining ports.
5350 * Allocate ATA host on success, NULL on failure.
5353 * Inherited from calling layer (may sleep).
5355 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5356 const struct ata_port_info
* const * ppi
,
5359 const struct ata_port_info
*pi
;
5360 struct ata_host
*host
;
5363 host
= ata_host_alloc(dev
, n_ports
);
5367 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5368 struct ata_port
*ap
= host
->ports
[i
];
5373 ap
->pio_mask
= pi
->pio_mask
;
5374 ap
->mwdma_mask
= pi
->mwdma_mask
;
5375 ap
->udma_mask
= pi
->udma_mask
;
5376 ap
->flags
|= pi
->flags
;
5377 ap
->link
.flags
|= pi
->link_flags
;
5378 ap
->ops
= pi
->port_ops
;
5380 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5381 host
->ops
= pi
->port_ops
;
5387 static void ata_host_stop(struct device
*gendev
, void *res
)
5389 struct ata_host
*host
= dev_get_drvdata(gendev
);
5392 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5394 for (i
= 0; i
< host
->n_ports
; i
++) {
5395 struct ata_port
*ap
= host
->ports
[i
];
5397 if (ap
->ops
->port_stop
)
5398 ap
->ops
->port_stop(ap
);
5401 if (host
->ops
->host_stop
)
5402 host
->ops
->host_stop(host
);
5406 * ata_finalize_port_ops - finalize ata_port_operations
5407 * @ops: ata_port_operations to finalize
5409 * An ata_port_operations can inherit from another ops and that
5410 * ops can again inherit from another. This can go on as many
5411 * times as necessary as long as there is no loop in the
5412 * inheritance chain.
5414 * Ops tables are finalized when the host is started. NULL or
5415 * unspecified entries are inherited from the closet ancestor
5416 * which has the method and the entry is populated with it.
5417 * After finalization, the ops table directly points to all the
5418 * methods and ->inherits is no longer necessary and cleared.
5420 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5425 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5427 static DEFINE_SPINLOCK(lock
);
5428 const struct ata_port_operations
*cur
;
5429 void **begin
= (void **)ops
;
5430 void **end
= (void **)&ops
->inherits
;
5433 if (!ops
|| !ops
->inherits
)
5438 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5439 void **inherit
= (void **)cur
;
5441 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5446 for (pp
= begin
; pp
< end
; pp
++)
5450 ops
->inherits
= NULL
;
5456 * ata_host_start - start and freeze ports of an ATA host
5457 * @host: ATA host to start ports for
5459 * Start and then freeze ports of @host. Started status is
5460 * recorded in host->flags, so this function can be called
5461 * multiple times. Ports are guaranteed to get started only
5462 * once. If host->ops isn't initialized yet, its set to the
5463 * first non-dummy port ops.
5466 * Inherited from calling layer (may sleep).
5469 * 0 if all ports are started successfully, -errno otherwise.
5471 int ata_host_start(struct ata_host
*host
)
5474 void *start_dr
= NULL
;
5477 if (host
->flags
& ATA_HOST_STARTED
)
5480 ata_finalize_port_ops(host
->ops
);
5482 for (i
= 0; i
< host
->n_ports
; i
++) {
5483 struct ata_port
*ap
= host
->ports
[i
];
5485 ata_finalize_port_ops(ap
->ops
);
5487 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5488 host
->ops
= ap
->ops
;
5490 if (ap
->ops
->port_stop
)
5494 if (host
->ops
->host_stop
)
5498 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5503 for (i
= 0; i
< host
->n_ports
; i
++) {
5504 struct ata_port
*ap
= host
->ports
[i
];
5506 if (ap
->ops
->port_start
) {
5507 rc
= ap
->ops
->port_start(ap
);
5510 dev_printk(KERN_ERR
, host
->dev
,
5511 "failed to start port %d "
5512 "(errno=%d)\n", i
, rc
);
5516 ata_eh_freeze_port(ap
);
5520 devres_add(host
->dev
, start_dr
);
5521 host
->flags
|= ATA_HOST_STARTED
;
5526 struct ata_port
*ap
= host
->ports
[i
];
5528 if (ap
->ops
->port_stop
)
5529 ap
->ops
->port_stop(ap
);
5531 devres_free(start_dr
);
5536 * ata_sas_host_init - Initialize a host struct
5537 * @host: host to initialize
5538 * @dev: device host is attached to
5539 * @flags: host flags
5543 * PCI/etc. bus probe sem.
5546 /* KILLME - the only user left is ipr */
5547 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5548 unsigned long flags
, struct ata_port_operations
*ops
)
5550 spin_lock_init(&host
->lock
);
5552 host
->flags
= flags
;
5557 * ata_host_register - register initialized ATA host
5558 * @host: ATA host to register
5559 * @sht: template for SCSI host
5561 * Register initialized ATA host. @host is allocated using
5562 * ata_host_alloc() and fully initialized by LLD. This function
5563 * starts ports, registers @host with ATA and SCSI layers and
5564 * probe registered devices.
5567 * Inherited from calling layer (may sleep).
5570 * 0 on success, -errno otherwise.
5572 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5576 /* host must have been started */
5577 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5578 dev_printk(KERN_ERR
, host
->dev
,
5579 "BUG: trying to register unstarted host\n");
5584 /* Blow away unused ports. This happens when LLD can't
5585 * determine the exact number of ports to allocate at
5588 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5589 kfree(host
->ports
[i
]);
5591 /* give ports names and add SCSI hosts */
5592 for (i
= 0; i
< host
->n_ports
; i
++)
5593 host
->ports
[i
]->print_id
= ata_print_id
++;
5595 rc
= ata_scsi_add_hosts(host
, sht
);
5599 /* associate with ACPI nodes */
5600 ata_acpi_associate(host
);
5602 /* set cable, sata_spd_limit and report */
5603 for (i
= 0; i
< host
->n_ports
; i
++) {
5604 struct ata_port
*ap
= host
->ports
[i
];
5605 unsigned long xfer_mask
;
5607 /* set SATA cable type if still unset */
5608 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5609 ap
->cbl
= ATA_CBL_SATA
;
5611 /* init sata_spd_limit to the current value */
5612 sata_link_init_spd(&ap
->link
);
5614 /* print per-port info to dmesg */
5615 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5618 if (!ata_port_is_dummy(ap
)) {
5619 ata_port_printk(ap
, KERN_INFO
,
5620 "%cATA max %s %s\n",
5621 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5622 ata_mode_string(xfer_mask
),
5623 ap
->link
.eh_info
.desc
);
5624 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5626 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5629 /* perform each probe synchronously */
5630 DPRINTK("probe begin\n");
5631 for (i
= 0; i
< host
->n_ports
; i
++) {
5632 struct ata_port
*ap
= host
->ports
[i
];
5635 if (ap
->ops
->error_handler
) {
5636 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5637 unsigned long flags
;
5641 /* kick EH for boot probing */
5642 spin_lock_irqsave(ap
->lock
, flags
);
5644 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5645 ehi
->action
|= ATA_EH_RESET
| ATA_EH_LPM
;
5646 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5648 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5649 ap
->pflags
|= ATA_PFLAG_LOADING
;
5650 ata_port_schedule_eh(ap
);
5652 spin_unlock_irqrestore(ap
->lock
, flags
);
5654 /* wait for EH to finish */
5655 ata_port_wait_eh(ap
);
5657 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5658 rc
= ata_bus_probe(ap
);
5659 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5662 /* FIXME: do something useful here?
5663 * Current libata behavior will
5664 * tear down everything when
5665 * the module is removed
5666 * or the h/w is unplugged.
5672 /* probes are done, now scan each port's disk(s) */
5673 DPRINTK("host probe begin\n");
5674 for (i
= 0; i
< host
->n_ports
; i
++) {
5675 struct ata_port
*ap
= host
->ports
[i
];
5677 ata_scsi_scan_host(ap
, 1);
5684 * ata_host_activate - start host, request IRQ and register it
5685 * @host: target ATA host
5686 * @irq: IRQ to request
5687 * @irq_handler: irq_handler used when requesting IRQ
5688 * @irq_flags: irq_flags used when requesting IRQ
5689 * @sht: scsi_host_template to use when registering the host
5691 * After allocating an ATA host and initializing it, most libata
5692 * LLDs perform three steps to activate the host - start host,
5693 * request IRQ and register it. This helper takes necessasry
5694 * arguments and performs the three steps in one go.
5696 * An invalid IRQ skips the IRQ registration and expects the host to
5697 * have set polling mode on the port. In this case, @irq_handler
5701 * Inherited from calling layer (may sleep).
5704 * 0 on success, -errno otherwise.
5706 int ata_host_activate(struct ata_host
*host
, int irq
,
5707 irq_handler_t irq_handler
, unsigned long irq_flags
,
5708 struct scsi_host_template
*sht
)
5712 rc
= ata_host_start(host
);
5716 /* Special case for polling mode */
5718 WARN_ON(irq_handler
);
5719 return ata_host_register(host
, sht
);
5722 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5723 dev_driver_string(host
->dev
), host
);
5727 for (i
= 0; i
< host
->n_ports
; i
++)
5728 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5730 rc
= ata_host_register(host
, sht
);
5731 /* if failed, just free the IRQ and leave ports alone */
5733 devm_free_irq(host
->dev
, irq
, host
);
5739 * ata_port_detach - Detach ATA port in prepration of device removal
5740 * @ap: ATA port to be detached
5742 * Detach all ATA devices and the associated SCSI devices of @ap;
5743 * then, remove the associated SCSI host. @ap is guaranteed to
5744 * be quiescent on return from this function.
5747 * Kernel thread context (may sleep).
5749 static void ata_port_detach(struct ata_port
*ap
)
5751 unsigned long flags
;
5752 struct ata_link
*link
;
5753 struct ata_device
*dev
;
5755 if (!ap
->ops
->error_handler
)
5758 /* tell EH we're leaving & flush EH */
5759 spin_lock_irqsave(ap
->lock
, flags
);
5760 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5761 spin_unlock_irqrestore(ap
->lock
, flags
);
5763 ata_port_wait_eh(ap
);
5765 /* EH is now guaranteed to see UNLOADING - EH context belongs
5766 * to us. Disable all existing devices.
5768 ata_port_for_each_link(link
, ap
) {
5769 ata_link_for_each_dev(dev
, link
)
5770 ata_dev_disable(dev
);
5773 /* Final freeze & EH. All in-flight commands are aborted. EH
5774 * will be skipped and retrials will be terminated with bad
5777 spin_lock_irqsave(ap
->lock
, flags
);
5778 ata_port_freeze(ap
); /* won't be thawed */
5779 spin_unlock_irqrestore(ap
->lock
, flags
);
5781 ata_port_wait_eh(ap
);
5782 cancel_rearming_delayed_work(&ap
->hotplug_task
);
5785 /* remove the associated SCSI host */
5786 scsi_remove_host(ap
->scsi_host
);
5790 * ata_host_detach - Detach all ports of an ATA host
5791 * @host: Host to detach
5793 * Detach all ports of @host.
5796 * Kernel thread context (may sleep).
5798 void ata_host_detach(struct ata_host
*host
)
5802 for (i
= 0; i
< host
->n_ports
; i
++)
5803 ata_port_detach(host
->ports
[i
]);
5805 /* the host is dead now, dissociate ACPI */
5806 ata_acpi_dissociate(host
);
5812 * ata_pci_remove_one - PCI layer callback for device removal
5813 * @pdev: PCI device that was removed
5815 * PCI layer indicates to libata via this hook that hot-unplug or
5816 * module unload event has occurred. Detach all ports. Resource
5817 * release is handled via devres.
5820 * Inherited from PCI layer (may sleep).
5822 void ata_pci_remove_one(struct pci_dev
*pdev
)
5824 struct device
*dev
= &pdev
->dev
;
5825 struct ata_host
*host
= dev_get_drvdata(dev
);
5827 ata_host_detach(host
);
5830 /* move to PCI subsystem */
5831 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5833 unsigned long tmp
= 0;
5835 switch (bits
->width
) {
5838 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5844 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5850 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5861 return (tmp
== bits
->val
) ? 1 : 0;
5865 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5867 pci_save_state(pdev
);
5868 pci_disable_device(pdev
);
5870 if (mesg
.event
& PM_EVENT_SLEEP
)
5871 pci_set_power_state(pdev
, PCI_D3hot
);
5874 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
5878 pci_set_power_state(pdev
, PCI_D0
);
5879 pci_restore_state(pdev
);
5881 rc
= pcim_enable_device(pdev
);
5883 dev_printk(KERN_ERR
, &pdev
->dev
,
5884 "failed to enable device after resume (%d)\n", rc
);
5888 pci_set_master(pdev
);
5892 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5894 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
5897 rc
= ata_host_suspend(host
, mesg
);
5901 ata_pci_device_do_suspend(pdev
, mesg
);
5906 int ata_pci_device_resume(struct pci_dev
*pdev
)
5908 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
5911 rc
= ata_pci_device_do_resume(pdev
);
5913 ata_host_resume(host
);
5916 #endif /* CONFIG_PM */
5918 #endif /* CONFIG_PCI */
5920 static int __init
ata_parse_force_one(char **cur
,
5921 struct ata_force_ent
*force_ent
,
5922 const char **reason
)
5924 /* FIXME: Currently, there's no way to tag init const data and
5925 * using __initdata causes build failure on some versions of
5926 * gcc. Once __initdataconst is implemented, add const to the
5927 * following structure.
5929 static struct ata_force_param force_tbl
[] __initdata
= {
5930 { "40c", .cbl
= ATA_CBL_PATA40
},
5931 { "80c", .cbl
= ATA_CBL_PATA80
},
5932 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
5933 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
5934 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
5935 { "sata", .cbl
= ATA_CBL_SATA
},
5936 { "1.5Gbps", .spd_limit
= 1 },
5937 { "3.0Gbps", .spd_limit
= 2 },
5938 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
5939 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
5940 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
5941 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
5942 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
5943 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
5944 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
5945 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
5946 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
5947 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
5948 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
5949 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
5950 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
5951 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
5952 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5953 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5954 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5955 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5956 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5957 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5958 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5959 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5960 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5961 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5962 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5963 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5964 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5965 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5966 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5967 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5968 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5969 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5970 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5971 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5972 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5973 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
5975 char *start
= *cur
, *p
= *cur
;
5976 char *id
, *val
, *endp
;
5977 const struct ata_force_param
*match_fp
= NULL
;
5978 int nr_matches
= 0, i
;
5980 /* find where this param ends and update *cur */
5981 while (*p
!= '\0' && *p
!= ',')
5992 p
= strchr(start
, ':');
5994 val
= strstrip(start
);
5999 id
= strstrip(start
);
6000 val
= strstrip(p
+ 1);
6003 p
= strchr(id
, '.');
6006 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6007 if (p
== endp
|| *endp
!= '\0') {
6008 *reason
= "invalid device";
6013 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6014 if (p
== endp
|| *endp
!= '\0') {
6015 *reason
= "invalid port/link";
6020 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6021 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6022 const struct ata_force_param
*fp
= &force_tbl
[i
];
6024 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6030 if (strcasecmp(val
, fp
->name
) == 0) {
6037 *reason
= "unknown value";
6040 if (nr_matches
> 1) {
6041 *reason
= "ambigious value";
6045 force_ent
->param
= *match_fp
;
6050 static void __init
ata_parse_force_param(void)
6052 int idx
= 0, size
= 1;
6053 int last_port
= -1, last_device
= -1;
6054 char *p
, *cur
, *next
;
6056 /* calculate maximum number of params and allocate force_tbl */
6057 for (p
= ata_force_param_buf
; *p
; p
++)
6061 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6062 if (!ata_force_tbl
) {
6063 printk(KERN_WARNING
"ata: failed to extend force table, "
6064 "libata.force ignored\n");
6068 /* parse and populate the table */
6069 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6070 const char *reason
= "";
6071 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6074 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6075 printk(KERN_WARNING
"ata: failed to parse force "
6076 "parameter \"%s\" (%s)\n",
6081 if (te
.port
== -1) {
6082 te
.port
= last_port
;
6083 te
.device
= last_device
;
6086 ata_force_tbl
[idx
++] = te
;
6088 last_port
= te
.port
;
6089 last_device
= te
.device
;
6092 ata_force_tbl_size
= idx
;
6095 static int __init
ata_init(void)
6097 ata_parse_force_param();
6099 ata_wq
= create_workqueue("ata");
6103 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6105 destroy_workqueue(ata_wq
);
6109 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6113 static void __exit
ata_exit(void)
6115 kfree(ata_force_tbl
);
6116 destroy_workqueue(ata_wq
);
6117 destroy_workqueue(ata_aux_wq
);
6120 subsys_initcall(ata_init
);
6121 module_exit(ata_exit
);
6123 static unsigned long ratelimit_time
;
6124 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6126 int ata_ratelimit(void)
6129 unsigned long flags
;
6131 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6133 if (time_after(jiffies
, ratelimit_time
)) {
6135 ratelimit_time
= jiffies
+ (HZ
/5);
6139 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6145 * ata_wait_register - wait until register value changes
6146 * @reg: IO-mapped register
6147 * @mask: Mask to apply to read register value
6148 * @val: Wait condition
6149 * @interval: polling interval in milliseconds
6150 * @timeout: timeout in milliseconds
6152 * Waiting for some bits of register to change is a common
6153 * operation for ATA controllers. This function reads 32bit LE
6154 * IO-mapped register @reg and tests for the following condition.
6156 * (*@reg & mask) != val
6158 * If the condition is met, it returns; otherwise, the process is
6159 * repeated after @interval_msec until timeout.
6162 * Kernel thread context (may sleep)
6165 * The final register value.
6167 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6168 unsigned long interval
, unsigned long timeout
)
6170 unsigned long deadline
;
6173 tmp
= ioread32(reg
);
6175 /* Calculate timeout _after_ the first read to make sure
6176 * preceding writes reach the controller before starting to
6177 * eat away the timeout.
6179 deadline
= ata_deadline(jiffies
, timeout
);
6181 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6183 tmp
= ioread32(reg
);
6192 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6194 return AC_ERR_SYSTEM
;
6197 static void ata_dummy_error_handler(struct ata_port
*ap
)
6202 struct ata_port_operations ata_dummy_port_ops
= {
6203 .qc_prep
= ata_noop_qc_prep
,
6204 .qc_issue
= ata_dummy_qc_issue
,
6205 .error_handler
= ata_dummy_error_handler
,
6208 const struct ata_port_info ata_dummy_port_info
= {
6209 .port_ops
= &ata_dummy_port_ops
,
6213 * libata is essentially a library of internal helper functions for
6214 * low-level ATA host controller drivers. As such, the API/ABI is
6215 * likely to change as new drivers are added and updated.
6216 * Do not depend on ABI/API stability.
6218 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6219 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6220 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6221 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6222 EXPORT_SYMBOL_GPL(sata_port_ops
);
6223 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6224 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6225 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6226 EXPORT_SYMBOL_GPL(ata_host_init
);
6227 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6228 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6229 EXPORT_SYMBOL_GPL(ata_host_start
);
6230 EXPORT_SYMBOL_GPL(ata_host_register
);
6231 EXPORT_SYMBOL_GPL(ata_host_activate
);
6232 EXPORT_SYMBOL_GPL(ata_host_detach
);
6233 EXPORT_SYMBOL_GPL(ata_sg_init
);
6234 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6235 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6236 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6237 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6238 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6239 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6240 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6241 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6242 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6243 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6244 EXPORT_SYMBOL_GPL(ata_mode_string
);
6245 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6246 EXPORT_SYMBOL_GPL(ata_port_start
);
6247 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6248 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6249 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6250 EXPORT_SYMBOL_GPL(ata_port_probe
);
6251 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6252 EXPORT_SYMBOL_GPL(sata_set_spd
);
6253 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6254 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6255 EXPORT_SYMBOL_GPL(sata_link_resume
);
6256 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6257 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6258 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6259 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6260 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6261 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6262 EXPORT_SYMBOL_GPL(ata_port_disable
);
6263 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6264 EXPORT_SYMBOL_GPL(ata_wait_register
);
6265 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6266 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6267 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6268 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6269 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6270 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6271 EXPORT_SYMBOL_GPL(sata_scr_read
);
6272 EXPORT_SYMBOL_GPL(sata_scr_write
);
6273 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6274 EXPORT_SYMBOL_GPL(ata_link_online
);
6275 EXPORT_SYMBOL_GPL(ata_link_offline
);
6277 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6278 EXPORT_SYMBOL_GPL(ata_host_resume
);
6279 #endif /* CONFIG_PM */
6280 EXPORT_SYMBOL_GPL(ata_id_string
);
6281 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6282 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6284 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6285 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6286 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6287 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6288 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6291 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6292 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6294 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6295 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6296 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6297 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6298 #endif /* CONFIG_PM */
6299 #endif /* CONFIG_PCI */
6301 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6302 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6303 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6304 EXPORT_SYMBOL_GPL(ata_port_desc
);
6306 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6307 #endif /* CONFIG_PCI */
6308 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6309 EXPORT_SYMBOL_GPL(ata_link_abort
);
6310 EXPORT_SYMBOL_GPL(ata_port_abort
);
6311 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6312 EXPORT_SYMBOL_GPL(sata_async_notification
);
6313 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6314 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6315 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6316 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6317 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6318 EXPORT_SYMBOL_GPL(ata_do_eh
);
6319 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6321 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6322 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6323 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6324 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6325 EXPORT_SYMBOL_GPL(ata_cable_sata
);