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/jiffies.h>
58 #include <linux/scatterlist.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_host.h>
63 #include <linux/libata.h>
64 #include <asm/semaphore.h>
65 #include <asm/byteorder.h>
66 #include <linux/cdrom.h>
71 /* debounce timing parameters in msecs { interval, duration, timeout } */
72 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
73 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
74 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
76 const struct ata_port_operations ata_base_port_ops
= {
77 .prereset
= ata_std_prereset
,
78 .postreset
= ata_std_postreset
,
79 .error_handler
= ata_std_error_handler
,
82 const struct ata_port_operations sata_port_ops
= {
83 .inherits
= &ata_base_port_ops
,
85 .qc_defer
= ata_std_qc_defer
,
86 .hardreset
= sata_std_hardreset
,
87 .sff_dev_select
= ata_noop_dev_select
,
90 const struct ata_port_operations sata_pmp_port_ops
= {
91 .inherits
= &sata_port_ops
,
93 .pmp_prereset
= ata_std_prereset
,
94 .pmp_hardreset
= sata_std_hardreset
,
95 .pmp_postreset
= ata_std_postreset
,
96 .error_handler
= sata_pmp_error_handler
,
99 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
100 u16 heads
, u16 sectors
);
101 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
102 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
103 u8 enable
, u8 feature
);
104 static void ata_dev_xfermask(struct ata_device
*dev
);
105 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
107 unsigned int ata_print_id
= 1;
108 static struct workqueue_struct
*ata_wq
;
110 struct workqueue_struct
*ata_aux_wq
;
112 struct ata_force_param
{
116 unsigned long xfer_mask
;
117 unsigned int horkage_on
;
118 unsigned int horkage_off
;
121 struct ata_force_ent
{
124 struct ata_force_param param
;
127 static struct ata_force_ent
*ata_force_tbl
;
128 static int ata_force_tbl_size
;
130 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
131 /* param_buf is thrown away after initialization, disallow read */
132 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
133 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
135 int atapi_enabled
= 1;
136 module_param(atapi_enabled
, int, 0444);
137 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
139 static int atapi_dmadir
= 0;
140 module_param(atapi_dmadir
, int, 0444);
141 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
143 int atapi_passthru16
= 1;
144 module_param(atapi_passthru16
, int, 0444);
145 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
148 module_param_named(fua
, libata_fua
, int, 0444);
149 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
151 static int ata_ignore_hpa
;
152 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
153 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
155 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
156 module_param_named(dma
, libata_dma_mask
, int, 0444);
157 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
159 static int ata_probe_timeout
= ATA_TMOUT_INTERNAL
/ HZ
;
160 module_param(ata_probe_timeout
, int, 0444);
161 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
163 int libata_noacpi
= 0;
164 module_param_named(noacpi
, libata_noacpi
, int, 0444);
165 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
167 int libata_allow_tpm
= 0;
168 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
169 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
171 MODULE_AUTHOR("Jeff Garzik");
172 MODULE_DESCRIPTION("Library module for ATA devices");
173 MODULE_LICENSE("GPL");
174 MODULE_VERSION(DRV_VERSION
);
178 * ata_force_cbl - force cable type according to libata.force
179 * @ap: ATA port of interest
181 * Force cable type according to libata.force and whine about it.
182 * The last entry which has matching port number is used, so it
183 * can be specified as part of device force parameters. For
184 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
190 void ata_force_cbl(struct ata_port
*ap
)
194 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
195 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
197 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
200 if (fe
->param
.cbl
== ATA_CBL_NONE
)
203 ap
->cbl
= fe
->param
.cbl
;
204 ata_port_printk(ap
, KERN_NOTICE
,
205 "FORCE: cable set to %s\n", fe
->param
.name
);
211 * ata_force_spd_limit - force SATA spd limit according to libata.force
212 * @link: ATA link of interest
214 * Force SATA spd limit according to libata.force and whine about
215 * it. When only the port part is specified (e.g. 1:), the limit
216 * applies to all links connected to both the host link and all
217 * fan-out ports connected via PMP. If the device part is
218 * specified as 0 (e.g. 1.00:), it specifies the first fan-out
219 * link not the host link. Device number 15 always points to the
220 * host link whether PMP is attached or not.
225 static void ata_force_spd_limit(struct ata_link
*link
)
229 if (ata_is_host_link(link
))
234 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
235 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
237 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
240 if (fe
->device
!= -1 && fe
->device
!= linkno
)
243 if (!fe
->param
.spd_limit
)
246 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
247 ata_link_printk(link
, KERN_NOTICE
,
248 "FORCE: PHY spd limit set to %s\n", fe
->param
.name
);
254 * ata_force_xfermask - force xfermask according to libata.force
255 * @dev: ATA device of interest
257 * Force xfer_mask according to libata.force and whine about it.
258 * For consistency with link selection, device number 15 selects
259 * the first device connected to the host link.
264 static void ata_force_xfermask(struct ata_device
*dev
)
266 int devno
= dev
->link
->pmp
+ dev
->devno
;
267 int alt_devno
= devno
;
270 /* allow n.15 for the first device attached to host port */
271 if (ata_is_host_link(dev
->link
) && devno
== 0)
274 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
275 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
276 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
278 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
281 if (fe
->device
!= -1 && fe
->device
!= devno
&&
282 fe
->device
!= alt_devno
)
285 if (!fe
->param
.xfer_mask
)
288 ata_unpack_xfermask(fe
->param
.xfer_mask
,
289 &pio_mask
, &mwdma_mask
, &udma_mask
);
291 dev
->udma_mask
= udma_mask
;
292 else if (mwdma_mask
) {
294 dev
->mwdma_mask
= mwdma_mask
;
298 dev
->pio_mask
= pio_mask
;
301 ata_dev_printk(dev
, KERN_NOTICE
,
302 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
308 * ata_force_horkage - force horkage according to libata.force
309 * @dev: ATA device of interest
311 * Force horkage according to libata.force and whine about it.
312 * For consistency with link selection, device number 15 selects
313 * the first device connected to the host link.
318 static void ata_force_horkage(struct ata_device
*dev
)
320 int devno
= dev
->link
->pmp
+ dev
->devno
;
321 int alt_devno
= devno
;
324 /* allow n.15 for the first device attached to host port */
325 if (ata_is_host_link(dev
->link
) && devno
== 0)
328 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
329 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
331 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
334 if (fe
->device
!= -1 && fe
->device
!= devno
&&
335 fe
->device
!= alt_devno
)
338 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
339 !(dev
->horkage
& fe
->param
.horkage_off
))
342 dev
->horkage
|= fe
->param
.horkage_on
;
343 dev
->horkage
&= ~fe
->param
.horkage_off
;
345 ata_dev_printk(dev
, KERN_NOTICE
,
346 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
351 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
352 * @opcode: SCSI opcode
354 * Determine ATAPI command type from @opcode.
360 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
362 int atapi_cmd_type(u8 opcode
)
371 case GPCMD_WRITE_AND_VERIFY_10
:
375 case GPCMD_READ_CD_MSF
:
376 return ATAPI_READ_CD
;
380 if (atapi_passthru16
)
381 return ATAPI_PASS_THRU
;
389 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
390 * @tf: Taskfile to convert
391 * @pmp: Port multiplier port
392 * @is_cmd: This FIS is for command
393 * @fis: Buffer into which data will output
395 * Converts a standard ATA taskfile to a Serial ATA
396 * FIS structure (Register - Host to Device).
399 * Inherited from caller.
401 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
403 fis
[0] = 0x27; /* Register - Host to Device FIS */
404 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
406 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
408 fis
[2] = tf
->command
;
409 fis
[3] = tf
->feature
;
416 fis
[8] = tf
->hob_lbal
;
417 fis
[9] = tf
->hob_lbam
;
418 fis
[10] = tf
->hob_lbah
;
419 fis
[11] = tf
->hob_feature
;
422 fis
[13] = tf
->hob_nsect
;
433 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
434 * @fis: Buffer from which data will be input
435 * @tf: Taskfile to output
437 * Converts a serial ATA FIS structure to a standard ATA taskfile.
440 * Inherited from caller.
443 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
445 tf
->command
= fis
[2]; /* status */
446 tf
->feature
= fis
[3]; /* error */
453 tf
->hob_lbal
= fis
[8];
454 tf
->hob_lbam
= fis
[9];
455 tf
->hob_lbah
= fis
[10];
458 tf
->hob_nsect
= fis
[13];
461 static const u8 ata_rw_cmds
[] = {
465 ATA_CMD_READ_MULTI_EXT
,
466 ATA_CMD_WRITE_MULTI_EXT
,
470 ATA_CMD_WRITE_MULTI_FUA_EXT
,
474 ATA_CMD_PIO_READ_EXT
,
475 ATA_CMD_PIO_WRITE_EXT
,
488 ATA_CMD_WRITE_FUA_EXT
492 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
493 * @tf: command to examine and configure
494 * @dev: device tf belongs to
496 * Examine the device configuration and tf->flags to calculate
497 * the proper read/write commands and protocol to use.
502 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
506 int index
, fua
, lba48
, write
;
508 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
509 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
510 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
512 if (dev
->flags
& ATA_DFLAG_PIO
) {
513 tf
->protocol
= ATA_PROT_PIO
;
514 index
= dev
->multi_count
? 0 : 8;
515 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
516 /* Unable to use DMA due to host limitation */
517 tf
->protocol
= ATA_PROT_PIO
;
518 index
= dev
->multi_count
? 0 : 8;
520 tf
->protocol
= ATA_PROT_DMA
;
524 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
533 * ata_tf_read_block - Read block address from ATA taskfile
534 * @tf: ATA taskfile of interest
535 * @dev: ATA device @tf belongs to
540 * Read block address from @tf. This function can handle all
541 * three address formats - LBA, LBA48 and CHS. tf->protocol and
542 * flags select the address format to use.
545 * Block address read from @tf.
547 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
551 if (tf
->flags
& ATA_TFLAG_LBA
) {
552 if (tf
->flags
& ATA_TFLAG_LBA48
) {
553 block
|= (u64
)tf
->hob_lbah
<< 40;
554 block
|= (u64
)tf
->hob_lbam
<< 32;
555 block
|= tf
->hob_lbal
<< 24;
557 block
|= (tf
->device
& 0xf) << 24;
559 block
|= tf
->lbah
<< 16;
560 block
|= tf
->lbam
<< 8;
565 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
566 head
= tf
->device
& 0xf;
569 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
576 * ata_build_rw_tf - Build ATA taskfile for given read/write request
577 * @tf: Target ATA taskfile
578 * @dev: ATA device @tf belongs to
579 * @block: Block address
580 * @n_block: Number of blocks
581 * @tf_flags: RW/FUA etc...
587 * Build ATA taskfile @tf for read/write request described by
588 * @block, @n_block, @tf_flags and @tag on @dev.
592 * 0 on success, -ERANGE if the request is too large for @dev,
593 * -EINVAL if the request is invalid.
595 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
596 u64 block
, u32 n_block
, unsigned int tf_flags
,
599 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
600 tf
->flags
|= tf_flags
;
602 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
604 if (!lba_48_ok(block
, n_block
))
607 tf
->protocol
= ATA_PROT_NCQ
;
608 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
610 if (tf
->flags
& ATA_TFLAG_WRITE
)
611 tf
->command
= ATA_CMD_FPDMA_WRITE
;
613 tf
->command
= ATA_CMD_FPDMA_READ
;
615 tf
->nsect
= tag
<< 3;
616 tf
->hob_feature
= (n_block
>> 8) & 0xff;
617 tf
->feature
= n_block
& 0xff;
619 tf
->hob_lbah
= (block
>> 40) & 0xff;
620 tf
->hob_lbam
= (block
>> 32) & 0xff;
621 tf
->hob_lbal
= (block
>> 24) & 0xff;
622 tf
->lbah
= (block
>> 16) & 0xff;
623 tf
->lbam
= (block
>> 8) & 0xff;
624 tf
->lbal
= block
& 0xff;
627 if (tf
->flags
& ATA_TFLAG_FUA
)
628 tf
->device
|= 1 << 7;
629 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
630 tf
->flags
|= ATA_TFLAG_LBA
;
632 if (lba_28_ok(block
, n_block
)) {
634 tf
->device
|= (block
>> 24) & 0xf;
635 } else if (lba_48_ok(block
, n_block
)) {
636 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
640 tf
->flags
|= ATA_TFLAG_LBA48
;
642 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
644 tf
->hob_lbah
= (block
>> 40) & 0xff;
645 tf
->hob_lbam
= (block
>> 32) & 0xff;
646 tf
->hob_lbal
= (block
>> 24) & 0xff;
648 /* request too large even for LBA48 */
651 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
654 tf
->nsect
= n_block
& 0xff;
656 tf
->lbah
= (block
>> 16) & 0xff;
657 tf
->lbam
= (block
>> 8) & 0xff;
658 tf
->lbal
= block
& 0xff;
660 tf
->device
|= ATA_LBA
;
663 u32 sect
, head
, cyl
, track
;
665 /* The request -may- be too large for CHS addressing. */
666 if (!lba_28_ok(block
, n_block
))
669 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
672 /* Convert LBA to CHS */
673 track
= (u32
)block
/ dev
->sectors
;
674 cyl
= track
/ dev
->heads
;
675 head
= track
% dev
->heads
;
676 sect
= (u32
)block
% dev
->sectors
+ 1;
678 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
679 (u32
)block
, track
, cyl
, head
, sect
);
681 /* Check whether the converted CHS can fit.
685 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
688 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
699 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
700 * @pio_mask: pio_mask
701 * @mwdma_mask: mwdma_mask
702 * @udma_mask: udma_mask
704 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
705 * unsigned int xfer_mask.
713 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
714 unsigned long mwdma_mask
,
715 unsigned long udma_mask
)
717 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
718 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
719 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
723 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
724 * @xfer_mask: xfer_mask to unpack
725 * @pio_mask: resulting pio_mask
726 * @mwdma_mask: resulting mwdma_mask
727 * @udma_mask: resulting udma_mask
729 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
730 * Any NULL distination masks will be ignored.
732 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
733 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
736 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
738 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
740 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
743 static const struct ata_xfer_ent
{
747 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
748 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
749 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
754 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
755 * @xfer_mask: xfer_mask of interest
757 * Return matching XFER_* value for @xfer_mask. Only the highest
758 * bit of @xfer_mask is considered.
764 * Matching XFER_* value, 0xff if no match found.
766 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
768 int highbit
= fls(xfer_mask
) - 1;
769 const struct ata_xfer_ent
*ent
;
771 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
772 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
773 return ent
->base
+ highbit
- ent
->shift
;
778 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
779 * @xfer_mode: XFER_* of interest
781 * Return matching xfer_mask for @xfer_mode.
787 * Matching xfer_mask, 0 if no match found.
789 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
791 const struct ata_xfer_ent
*ent
;
793 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
794 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
795 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
796 & ~((1 << ent
->shift
) - 1);
801 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
802 * @xfer_mode: XFER_* of interest
804 * Return matching xfer_shift for @xfer_mode.
810 * Matching xfer_shift, -1 if no match found.
812 int ata_xfer_mode2shift(unsigned long xfer_mode
)
814 const struct ata_xfer_ent
*ent
;
816 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
817 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
823 * ata_mode_string - convert xfer_mask to string
824 * @xfer_mask: mask of bits supported; only highest bit counts.
826 * Determine string which represents the highest speed
827 * (highest bit in @modemask).
833 * Constant C string representing highest speed listed in
834 * @mode_mask, or the constant C string "<n/a>".
836 const char *ata_mode_string(unsigned long xfer_mask
)
838 static const char * const xfer_mode_str
[] = {
862 highbit
= fls(xfer_mask
) - 1;
863 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
864 return xfer_mode_str
[highbit
];
868 static const char *sata_spd_string(unsigned int spd
)
870 static const char * const spd_str
[] = {
875 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
877 return spd_str
[spd
- 1];
880 void ata_dev_disable(struct ata_device
*dev
)
882 if (ata_dev_enabled(dev
)) {
883 if (ata_msg_drv(dev
->link
->ap
))
884 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
885 ata_acpi_on_disable(dev
);
886 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
892 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
894 struct ata_link
*link
= dev
->link
;
895 struct ata_port
*ap
= link
->ap
;
897 unsigned int err_mask
;
901 * disallow DIPM for drivers which haven't set
902 * ATA_FLAG_IPM. This is because when DIPM is enabled,
903 * phy ready will be set in the interrupt status on
904 * state changes, which will cause some drivers to
905 * think there are errors - additionally drivers will
906 * need to disable hot plug.
908 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
909 ap
->pm_policy
= NOT_AVAILABLE
;
914 * For DIPM, we will only enable it for the
917 * Why? Because Disks are too stupid to know that
918 * If the host rejects a request to go to SLUMBER
919 * they should retry at PARTIAL, and instead it
920 * just would give up. So, for medium_power to
921 * work at all, we need to only allow HIPM.
923 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
929 /* no restrictions on IPM transitions */
930 scontrol
&= ~(0x3 << 8);
931 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
936 if (dev
->flags
& ATA_DFLAG_DIPM
)
937 err_mask
= ata_dev_set_feature(dev
,
938 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
941 /* allow IPM to PARTIAL */
942 scontrol
&= ~(0x1 << 8);
943 scontrol
|= (0x2 << 8);
944 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
949 * we don't have to disable DIPM since IPM flags
950 * disallow transitions to SLUMBER, which effectively
951 * disable DIPM if it does not support PARTIAL
955 case MAX_PERFORMANCE
:
956 /* disable all IPM transitions */
957 scontrol
|= (0x3 << 8);
958 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
963 * we don't have to disable DIPM since IPM flags
964 * disallow all transitions which effectively
965 * disable DIPM anyway.
970 /* FIXME: handle SET FEATURES failure */
977 * ata_dev_enable_pm - enable SATA interface power management
978 * @dev: device to enable power management
979 * @policy: the link power management policy
981 * Enable SATA Interface power management. This will enable
982 * Device Interface Power Management (DIPM) for min_power
983 * policy, and then call driver specific callbacks for
984 * enabling Host Initiated Power management.
987 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
989 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
992 struct ata_port
*ap
= dev
->link
->ap
;
994 /* set HIPM first, then DIPM */
995 if (ap
->ops
->enable_pm
)
996 rc
= ap
->ops
->enable_pm(ap
, policy
);
999 rc
= ata_dev_set_dipm(dev
, policy
);
1003 ap
->pm_policy
= MAX_PERFORMANCE
;
1005 ap
->pm_policy
= policy
;
1006 return /* rc */; /* hopefully we can use 'rc' eventually */
1011 * ata_dev_disable_pm - disable SATA interface power management
1012 * @dev: device to disable power management
1014 * Disable SATA Interface power management. This will disable
1015 * Device Interface Power Management (DIPM) without changing
1016 * policy, call driver specific callbacks for disabling Host
1017 * Initiated Power management.
1022 static void ata_dev_disable_pm(struct ata_device
*dev
)
1024 struct ata_port
*ap
= dev
->link
->ap
;
1026 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1027 if (ap
->ops
->disable_pm
)
1028 ap
->ops
->disable_pm(ap
);
1030 #endif /* CONFIG_PM */
1032 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1034 ap
->pm_policy
= policy
;
1035 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1036 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1037 ata_port_schedule_eh(ap
);
1041 static void ata_lpm_enable(struct ata_host
*host
)
1043 struct ata_link
*link
;
1044 struct ata_port
*ap
;
1045 struct ata_device
*dev
;
1048 for (i
= 0; i
< host
->n_ports
; i
++) {
1049 ap
= host
->ports
[i
];
1050 ata_port_for_each_link(link
, ap
) {
1051 ata_link_for_each_dev(dev
, link
)
1052 ata_dev_disable_pm(dev
);
1057 static void ata_lpm_disable(struct ata_host
*host
)
1061 for (i
= 0; i
< host
->n_ports
; i
++) {
1062 struct ata_port
*ap
= host
->ports
[i
];
1063 ata_lpm_schedule(ap
, ap
->pm_policy
);
1066 #endif /* CONFIG_PM */
1069 * ata_dev_classify - determine device type based on ATA-spec signature
1070 * @tf: ATA taskfile register set for device to be identified
1072 * Determine from taskfile register contents whether a device is
1073 * ATA or ATAPI, as per "Signature and persistence" section
1074 * of ATA/PI spec (volume 1, sect 5.14).
1080 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1081 * %ATA_DEV_UNKNOWN the event of failure.
1083 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1085 /* Apple's open source Darwin code hints that some devices only
1086 * put a proper signature into the LBA mid/high registers,
1087 * So, we only check those. It's sufficient for uniqueness.
1089 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1090 * signatures for ATA and ATAPI devices attached on SerialATA,
1091 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1092 * spec has never mentioned about using different signatures
1093 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1094 * Multiplier specification began to use 0x69/0x96 to identify
1095 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1096 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1097 * 0x69/0x96 shortly and described them as reserved for
1100 * We follow the current spec and consider that 0x69/0x96
1101 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1103 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1104 DPRINTK("found ATA device by sig\n");
1108 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1109 DPRINTK("found ATAPI device by sig\n");
1110 return ATA_DEV_ATAPI
;
1113 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1114 DPRINTK("found PMP device by sig\n");
1118 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1119 printk(KERN_INFO
"ata: SEMB device ignored\n");
1120 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1123 DPRINTK("unknown device\n");
1124 return ATA_DEV_UNKNOWN
;
1128 * ata_id_string - Convert IDENTIFY DEVICE page into string
1129 * @id: IDENTIFY DEVICE results we will examine
1130 * @s: string into which data is output
1131 * @ofs: offset into identify device page
1132 * @len: length of string to return. must be an even number.
1134 * The strings in the IDENTIFY DEVICE page are broken up into
1135 * 16-bit chunks. Run through the string, and output each
1136 * 8-bit chunk linearly, regardless of platform.
1142 void ata_id_string(const u16
*id
, unsigned char *s
,
1143 unsigned int ofs
, unsigned int len
)
1162 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1163 * @id: IDENTIFY DEVICE results we will examine
1164 * @s: string into which data is output
1165 * @ofs: offset into identify device page
1166 * @len: length of string to return. must be an odd number.
1168 * This function is identical to ata_id_string except that it
1169 * trims trailing spaces and terminates the resulting string with
1170 * null. @len must be actual maximum length (even number) + 1.
1175 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1176 unsigned int ofs
, unsigned int len
)
1180 WARN_ON(!(len
& 1));
1182 ata_id_string(id
, s
, ofs
, len
- 1);
1184 p
= s
+ strnlen(s
, len
- 1);
1185 while (p
> s
&& p
[-1] == ' ')
1190 static u64
ata_id_n_sectors(const u16
*id
)
1192 if (ata_id_has_lba(id
)) {
1193 if (ata_id_has_lba48(id
))
1194 return ata_id_u64(id
, 100);
1196 return ata_id_u32(id
, 60);
1198 if (ata_id_current_chs_valid(id
))
1199 return ata_id_u32(id
, 57);
1201 return id
[1] * id
[3] * id
[6];
1205 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1209 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1210 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1211 sectors
|= (tf
->hob_lbal
& 0xff) << 24;
1212 sectors
|= (tf
->lbah
& 0xff) << 16;
1213 sectors
|= (tf
->lbam
& 0xff) << 8;
1214 sectors
|= (tf
->lbal
& 0xff);
1219 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1223 sectors
|= (tf
->device
& 0x0f) << 24;
1224 sectors
|= (tf
->lbah
& 0xff) << 16;
1225 sectors
|= (tf
->lbam
& 0xff) << 8;
1226 sectors
|= (tf
->lbal
& 0xff);
1232 * ata_read_native_max_address - Read native max address
1233 * @dev: target device
1234 * @max_sectors: out parameter for the result native max address
1236 * Perform an LBA48 or LBA28 native size query upon the device in
1240 * 0 on success, -EACCES if command is aborted by the drive.
1241 * -EIO on other errors.
1243 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1245 unsigned int err_mask
;
1246 struct ata_taskfile tf
;
1247 int lba48
= ata_id_has_lba48(dev
->id
);
1249 ata_tf_init(dev
, &tf
);
1251 /* always clear all address registers */
1252 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1255 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1256 tf
.flags
|= ATA_TFLAG_LBA48
;
1258 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1260 tf
.protocol
|= ATA_PROT_NODATA
;
1261 tf
.device
|= ATA_LBA
;
1263 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1265 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1266 "max address (err_mask=0x%x)\n", err_mask
);
1267 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1273 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1275 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1276 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1282 * ata_set_max_sectors - Set max sectors
1283 * @dev: target device
1284 * @new_sectors: new max sectors value to set for the device
1286 * Set max sectors of @dev to @new_sectors.
1289 * 0 on success, -EACCES if command is aborted or denied (due to
1290 * previous non-volatile SET_MAX) by the drive. -EIO on other
1293 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1295 unsigned int err_mask
;
1296 struct ata_taskfile tf
;
1297 int lba48
= ata_id_has_lba48(dev
->id
);
1301 ata_tf_init(dev
, &tf
);
1303 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1306 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1307 tf
.flags
|= ATA_TFLAG_LBA48
;
1309 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1310 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1311 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1313 tf
.command
= ATA_CMD_SET_MAX
;
1315 tf
.device
|= (new_sectors
>> 24) & 0xf;
1318 tf
.protocol
|= ATA_PROT_NODATA
;
1319 tf
.device
|= ATA_LBA
;
1321 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1322 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1323 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1325 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1327 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1328 "max address (err_mask=0x%x)\n", err_mask
);
1329 if (err_mask
== AC_ERR_DEV
&&
1330 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1339 * ata_hpa_resize - Resize a device with an HPA set
1340 * @dev: Device to resize
1342 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1343 * it if required to the full size of the media. The caller must check
1344 * the drive has the HPA feature set enabled.
1347 * 0 on success, -errno on failure.
1349 static int ata_hpa_resize(struct ata_device
*dev
)
1351 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1352 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1353 u64 sectors
= ata_id_n_sectors(dev
->id
);
1357 /* do we need to do it? */
1358 if (dev
->class != ATA_DEV_ATA
||
1359 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1360 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1363 /* read native max address */
1364 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1366 /* If device aborted the command or HPA isn't going to
1367 * be unlocked, skip HPA resizing.
1369 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1370 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1371 "broken, skipping HPA handling\n");
1372 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1374 /* we can continue if device aborted the command */
1382 /* nothing to do? */
1383 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1384 if (!print_info
|| native_sectors
== sectors
)
1387 if (native_sectors
> sectors
)
1388 ata_dev_printk(dev
, KERN_INFO
,
1389 "HPA detected: current %llu, native %llu\n",
1390 (unsigned long long)sectors
,
1391 (unsigned long long)native_sectors
);
1392 else if (native_sectors
< sectors
)
1393 ata_dev_printk(dev
, KERN_WARNING
,
1394 "native sectors (%llu) is smaller than "
1396 (unsigned long long)native_sectors
,
1397 (unsigned long long)sectors
);
1401 /* let's unlock HPA */
1402 rc
= ata_set_max_sectors(dev
, native_sectors
);
1403 if (rc
== -EACCES
) {
1404 /* if device aborted the command, skip HPA resizing */
1405 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1406 "(%llu -> %llu), skipping HPA handling\n",
1407 (unsigned long long)sectors
,
1408 (unsigned long long)native_sectors
);
1409 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1414 /* re-read IDENTIFY data */
1415 rc
= ata_dev_reread_id(dev
, 0);
1417 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1418 "data after HPA resizing\n");
1423 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1424 ata_dev_printk(dev
, KERN_INFO
,
1425 "HPA unlocked: %llu -> %llu, native %llu\n",
1426 (unsigned long long)sectors
,
1427 (unsigned long long)new_sectors
,
1428 (unsigned long long)native_sectors
);
1435 * ata_noop_dev_select - Select device 0/1 on ATA bus
1436 * @ap: ATA channel to manipulate
1437 * @device: ATA device (numbered from zero) to select
1439 * This function performs no actual function.
1441 * May be used as the dev_select() entry in ata_port_operations.
1446 void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
)
1451 * ata_dump_id - IDENTIFY DEVICE info debugging output
1452 * @id: IDENTIFY DEVICE page to dump
1454 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1461 static inline void ata_dump_id(const u16
*id
)
1463 DPRINTK("49==0x%04x "
1473 DPRINTK("80==0x%04x "
1483 DPRINTK("88==0x%04x "
1490 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1491 * @id: IDENTIFY data to compute xfer mask from
1493 * Compute the xfermask for this device. This is not as trivial
1494 * as it seems if we must consider early devices correctly.
1496 * FIXME: pre IDE drive timing (do we care ?).
1504 unsigned long ata_id_xfermask(const u16
*id
)
1506 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1508 /* Usual case. Word 53 indicates word 64 is valid */
1509 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1510 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1514 /* If word 64 isn't valid then Word 51 high byte holds
1515 * the PIO timing number for the maximum. Turn it into
1518 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1519 if (mode
< 5) /* Valid PIO range */
1520 pio_mask
= (2 << mode
) - 1;
1524 /* But wait.. there's more. Design your standards by
1525 * committee and you too can get a free iordy field to
1526 * process. However its the speeds not the modes that
1527 * are supported... Note drivers using the timing API
1528 * will get this right anyway
1532 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1534 if (ata_id_is_cfa(id
)) {
1536 * Process compact flash extended modes
1538 int pio
= id
[163] & 0x7;
1539 int dma
= (id
[163] >> 3) & 7;
1542 pio_mask
|= (1 << 5);
1544 pio_mask
|= (1 << 6);
1546 mwdma_mask
|= (1 << 3);
1548 mwdma_mask
|= (1 << 4);
1552 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1553 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1555 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1559 * ata_pio_queue_task - Queue port_task
1560 * @ap: The ata_port to queue port_task for
1561 * @fn: workqueue function to be scheduled
1562 * @data: data for @fn to use
1563 * @delay: delay time for workqueue function
1565 * Schedule @fn(@data) for execution after @delay jiffies using
1566 * port_task. There is one port_task per port and it's the
1567 * user(low level driver)'s responsibility to make sure that only
1568 * one task is active at any given time.
1570 * libata core layer takes care of synchronization between
1571 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1575 * Inherited from caller.
1577 void ata_pio_queue_task(struct ata_port
*ap
, void *data
, unsigned long delay
)
1579 ap
->port_task_data
= data
;
1581 /* may fail if ata_port_flush_task() in progress */
1582 queue_delayed_work(ata_wq
, &ap
->port_task
, delay
);
1586 * ata_port_flush_task - Flush port_task
1587 * @ap: The ata_port to flush port_task for
1589 * After this function completes, port_task is guranteed not to
1590 * be running or scheduled.
1593 * Kernel thread context (may sleep)
1595 void ata_port_flush_task(struct ata_port
*ap
)
1599 cancel_rearming_delayed_work(&ap
->port_task
);
1601 if (ata_msg_ctl(ap
))
1602 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1605 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1607 struct completion
*waiting
= qc
->private_data
;
1613 * ata_exec_internal_sg - execute libata internal command
1614 * @dev: Device to which the command is sent
1615 * @tf: Taskfile registers for the command and the result
1616 * @cdb: CDB for packet command
1617 * @dma_dir: Data tranfer direction of the command
1618 * @sgl: sg list for the data buffer of the command
1619 * @n_elem: Number of sg entries
1620 * @timeout: Timeout in msecs (0 for default)
1622 * Executes libata internal command with timeout. @tf contains
1623 * command on entry and result on return. Timeout and error
1624 * conditions are reported via return value. No recovery action
1625 * is taken after a command times out. It's caller's duty to
1626 * clean up after timeout.
1629 * None. Should be called with kernel context, might sleep.
1632 * Zero on success, AC_ERR_* mask on failure
1634 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1635 struct ata_taskfile
*tf
, const u8
*cdb
,
1636 int dma_dir
, struct scatterlist
*sgl
,
1637 unsigned int n_elem
, unsigned long timeout
)
1639 struct ata_link
*link
= dev
->link
;
1640 struct ata_port
*ap
= link
->ap
;
1641 u8 command
= tf
->command
;
1642 struct ata_queued_cmd
*qc
;
1643 unsigned int tag
, preempted_tag
;
1644 u32 preempted_sactive
, preempted_qc_active
;
1645 int preempted_nr_active_links
;
1646 DECLARE_COMPLETION_ONSTACK(wait
);
1647 unsigned long flags
;
1648 unsigned int err_mask
;
1651 spin_lock_irqsave(ap
->lock
, flags
);
1653 /* no internal command while frozen */
1654 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1655 spin_unlock_irqrestore(ap
->lock
, flags
);
1656 return AC_ERR_SYSTEM
;
1659 /* initialize internal qc */
1661 /* XXX: Tag 0 is used for drivers with legacy EH as some
1662 * drivers choke if any other tag is given. This breaks
1663 * ata_tag_internal() test for those drivers. Don't use new
1664 * EH stuff without converting to it.
1666 if (ap
->ops
->error_handler
)
1667 tag
= ATA_TAG_INTERNAL
;
1671 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1673 qc
= __ata_qc_from_tag(ap
, tag
);
1681 preempted_tag
= link
->active_tag
;
1682 preempted_sactive
= link
->sactive
;
1683 preempted_qc_active
= ap
->qc_active
;
1684 preempted_nr_active_links
= ap
->nr_active_links
;
1685 link
->active_tag
= ATA_TAG_POISON
;
1688 ap
->nr_active_links
= 0;
1690 /* prepare & issue qc */
1693 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1694 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1695 qc
->dma_dir
= dma_dir
;
1696 if (dma_dir
!= DMA_NONE
) {
1697 unsigned int i
, buflen
= 0;
1698 struct scatterlist
*sg
;
1700 for_each_sg(sgl
, sg
, n_elem
, i
)
1701 buflen
+= sg
->length
;
1703 ata_sg_init(qc
, sgl
, n_elem
);
1704 qc
->nbytes
= buflen
;
1707 qc
->private_data
= &wait
;
1708 qc
->complete_fn
= ata_qc_complete_internal
;
1712 spin_unlock_irqrestore(ap
->lock
, flags
);
1715 timeout
= ata_probe_timeout
* 1000 / HZ
;
1717 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1719 ata_port_flush_task(ap
);
1722 spin_lock_irqsave(ap
->lock
, flags
);
1724 /* We're racing with irq here. If we lose, the
1725 * following test prevents us from completing the qc
1726 * twice. If we win, the port is frozen and will be
1727 * cleaned up by ->post_internal_cmd().
1729 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1730 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1732 if (ap
->ops
->error_handler
)
1733 ata_port_freeze(ap
);
1735 ata_qc_complete(qc
);
1737 if (ata_msg_warn(ap
))
1738 ata_dev_printk(dev
, KERN_WARNING
,
1739 "qc timeout (cmd 0x%x)\n", command
);
1742 spin_unlock_irqrestore(ap
->lock
, flags
);
1745 /* do post_internal_cmd */
1746 if (ap
->ops
->post_internal_cmd
)
1747 ap
->ops
->post_internal_cmd(qc
);
1749 /* perform minimal error analysis */
1750 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1751 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1752 qc
->err_mask
|= AC_ERR_DEV
;
1755 qc
->err_mask
|= AC_ERR_OTHER
;
1757 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1758 qc
->err_mask
&= ~AC_ERR_OTHER
;
1762 spin_lock_irqsave(ap
->lock
, flags
);
1764 *tf
= qc
->result_tf
;
1765 err_mask
= qc
->err_mask
;
1768 link
->active_tag
= preempted_tag
;
1769 link
->sactive
= preempted_sactive
;
1770 ap
->qc_active
= preempted_qc_active
;
1771 ap
->nr_active_links
= preempted_nr_active_links
;
1773 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1774 * Until those drivers are fixed, we detect the condition
1775 * here, fail the command with AC_ERR_SYSTEM and reenable the
1778 * Note that this doesn't change any behavior as internal
1779 * command failure results in disabling the device in the
1780 * higher layer for LLDDs without new reset/EH callbacks.
1782 * Kill the following code as soon as those drivers are fixed.
1784 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1785 err_mask
|= AC_ERR_SYSTEM
;
1789 spin_unlock_irqrestore(ap
->lock
, flags
);
1795 * ata_exec_internal - execute libata internal command
1796 * @dev: Device to which the command is sent
1797 * @tf: Taskfile registers for the command and the result
1798 * @cdb: CDB for packet command
1799 * @dma_dir: Data tranfer direction of the command
1800 * @buf: Data buffer of the command
1801 * @buflen: Length of data buffer
1802 * @timeout: Timeout in msecs (0 for default)
1804 * Wrapper around ata_exec_internal_sg() which takes simple
1805 * buffer instead of sg list.
1808 * None. Should be called with kernel context, might sleep.
1811 * Zero on success, AC_ERR_* mask on failure
1813 unsigned ata_exec_internal(struct ata_device
*dev
,
1814 struct ata_taskfile
*tf
, const u8
*cdb
,
1815 int dma_dir
, void *buf
, unsigned int buflen
,
1816 unsigned long timeout
)
1818 struct scatterlist
*psg
= NULL
, sg
;
1819 unsigned int n_elem
= 0;
1821 if (dma_dir
!= DMA_NONE
) {
1823 sg_init_one(&sg
, buf
, buflen
);
1828 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1833 * ata_do_simple_cmd - execute simple internal command
1834 * @dev: Device to which the command is sent
1835 * @cmd: Opcode to execute
1837 * Execute a 'simple' command, that only consists of the opcode
1838 * 'cmd' itself, without filling any other registers
1841 * Kernel thread context (may sleep).
1844 * Zero on success, AC_ERR_* mask on failure
1846 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1848 struct ata_taskfile tf
;
1850 ata_tf_init(dev
, &tf
);
1853 tf
.flags
|= ATA_TFLAG_DEVICE
;
1854 tf
.protocol
= ATA_PROT_NODATA
;
1856 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1860 * ata_pio_need_iordy - check if iordy needed
1863 * Check if the current speed of the device requires IORDY. Used
1864 * by various controllers for chip configuration.
1867 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1869 /* Controller doesn't support IORDY. Probably a pointless check
1870 as the caller should know this */
1871 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1873 /* PIO3 and higher it is mandatory */
1874 if (adev
->pio_mode
> XFER_PIO_2
)
1876 /* We turn it on when possible */
1877 if (ata_id_has_iordy(adev
->id
))
1883 * ata_pio_mask_no_iordy - Return the non IORDY mask
1886 * Compute the highest mode possible if we are not using iordy. Return
1887 * -1 if no iordy mode is available.
1890 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1892 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1893 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1894 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1895 /* Is the speed faster than the drive allows non IORDY ? */
1897 /* This is cycle times not frequency - watch the logic! */
1898 if (pio
> 240) /* PIO2 is 240nS per cycle */
1899 return 3 << ATA_SHIFT_PIO
;
1900 return 7 << ATA_SHIFT_PIO
;
1903 return 3 << ATA_SHIFT_PIO
;
1907 * ata_dev_read_id - Read ID data from the specified device
1908 * @dev: target device
1909 * @p_class: pointer to class of the target device (may be changed)
1910 * @flags: ATA_READID_* flags
1911 * @id: buffer to read IDENTIFY data into
1913 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1914 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1915 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1916 * for pre-ATA4 drives.
1918 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1919 * now we abort if we hit that case.
1922 * Kernel thread context (may sleep)
1925 * 0 on success, -errno otherwise.
1927 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1928 unsigned int flags
, u16
*id
)
1930 struct ata_port
*ap
= dev
->link
->ap
;
1931 unsigned int class = *p_class
;
1932 struct ata_taskfile tf
;
1933 unsigned int err_mask
= 0;
1935 int may_fallback
= 1, tried_spinup
= 0;
1938 if (ata_msg_ctl(ap
))
1939 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
1942 ata_tf_init(dev
, &tf
);
1946 tf
.command
= ATA_CMD_ID_ATA
;
1949 tf
.command
= ATA_CMD_ID_ATAPI
;
1953 reason
= "unsupported class";
1957 tf
.protocol
= ATA_PROT_PIO
;
1959 /* Some devices choke if TF registers contain garbage. Make
1960 * sure those are properly initialized.
1962 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1964 /* Device presence detection is unreliable on some
1965 * controllers. Always poll IDENTIFY if available.
1967 tf
.flags
|= ATA_TFLAG_POLLING
;
1969 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1970 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1972 if (err_mask
& AC_ERR_NODEV_HINT
) {
1973 ata_dev_printk(dev
, KERN_DEBUG
,
1974 "NODEV after polling detection\n");
1978 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1979 /* Device or controller might have reported
1980 * the wrong device class. Give a shot at the
1981 * other IDENTIFY if the current one is
1982 * aborted by the device.
1987 if (class == ATA_DEV_ATA
)
1988 class = ATA_DEV_ATAPI
;
1990 class = ATA_DEV_ATA
;
1994 /* Control reaches here iff the device aborted
1995 * both flavors of IDENTIFYs which happens
1996 * sometimes with phantom devices.
1998 ata_dev_printk(dev
, KERN_DEBUG
,
1999 "both IDENTIFYs aborted, assuming NODEV\n");
2004 reason
= "I/O error";
2008 /* Falling back doesn't make sense if ID data was read
2009 * successfully at least once.
2013 swap_buf_le16(id
, ATA_ID_WORDS
);
2017 reason
= "device reports invalid type";
2019 if (class == ATA_DEV_ATA
) {
2020 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2023 if (ata_id_is_ata(id
))
2027 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2030 * Drive powered-up in standby mode, and requires a specific
2031 * SET_FEATURES spin-up subcommand before it will accept
2032 * anything other than the original IDENTIFY command.
2034 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2035 if (err_mask
&& id
[2] != 0x738c) {
2037 reason
= "SPINUP failed";
2041 * If the drive initially returned incomplete IDENTIFY info,
2042 * we now must reissue the IDENTIFY command.
2044 if (id
[2] == 0x37c8)
2048 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2050 * The exact sequence expected by certain pre-ATA4 drives is:
2052 * IDENTIFY (optional in early ATA)
2053 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2055 * Some drives were very specific about that exact sequence.
2057 * Note that ATA4 says lba is mandatory so the second check
2058 * shoud never trigger.
2060 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2061 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2064 reason
= "INIT_DEV_PARAMS failed";
2068 /* current CHS translation info (id[53-58]) might be
2069 * changed. reread the identify device info.
2071 flags
&= ~ATA_READID_POSTRESET
;
2081 if (ata_msg_warn(ap
))
2082 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2083 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2087 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2089 struct ata_port
*ap
= dev
->link
->ap
;
2090 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2093 static void ata_dev_config_ncq(struct ata_device
*dev
,
2094 char *desc
, size_t desc_sz
)
2096 struct ata_port
*ap
= dev
->link
->ap
;
2097 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2099 if (!ata_id_has_ncq(dev
->id
)) {
2103 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2104 snprintf(desc
, desc_sz
, "NCQ (not used)");
2107 if (ap
->flags
& ATA_FLAG_NCQ
) {
2108 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2109 dev
->flags
|= ATA_DFLAG_NCQ
;
2112 if (hdepth
>= ddepth
)
2113 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2115 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2119 * ata_dev_configure - Configure the specified ATA/ATAPI device
2120 * @dev: Target device to configure
2122 * Configure @dev according to @dev->id. Generic and low-level
2123 * driver specific fixups are also applied.
2126 * Kernel thread context (may sleep)
2129 * 0 on success, -errno otherwise
2131 int ata_dev_configure(struct ata_device
*dev
)
2133 struct ata_port
*ap
= dev
->link
->ap
;
2134 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2135 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2136 const u16
*id
= dev
->id
;
2137 unsigned long xfer_mask
;
2138 char revbuf
[7]; /* XYZ-99\0 */
2139 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2140 char modelbuf
[ATA_ID_PROD_LEN
+1];
2143 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2144 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2149 if (ata_msg_probe(ap
))
2150 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2153 dev
->horkage
|= ata_dev_blacklisted(dev
);
2154 ata_force_horkage(dev
);
2156 /* let ACPI work its magic */
2157 rc
= ata_acpi_on_devcfg(dev
);
2161 /* massage HPA, do it early as it might change IDENTIFY data */
2162 rc
= ata_hpa_resize(dev
);
2166 /* print device capabilities */
2167 if (ata_msg_probe(ap
))
2168 ata_dev_printk(dev
, KERN_DEBUG
,
2169 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2170 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2172 id
[49], id
[82], id
[83], id
[84],
2173 id
[85], id
[86], id
[87], id
[88]);
2175 /* initialize to-be-configured parameters */
2176 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2177 dev
->max_sectors
= 0;
2185 * common ATA, ATAPI feature tests
2188 /* find max transfer mode; for printk only */
2189 xfer_mask
= ata_id_xfermask(id
);
2191 if (ata_msg_probe(ap
))
2194 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2195 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2198 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2201 /* ATA-specific feature tests */
2202 if (dev
->class == ATA_DEV_ATA
) {
2203 if (ata_id_is_cfa(id
)) {
2204 if (id
[162] & 1) /* CPRM may make this media unusable */
2205 ata_dev_printk(dev
, KERN_WARNING
,
2206 "supports DRM functions and may "
2207 "not be fully accessable.\n");
2208 snprintf(revbuf
, 7, "CFA");
2210 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2211 /* Warn the user if the device has TPM extensions */
2212 if (ata_id_has_tpm(id
))
2213 ata_dev_printk(dev
, KERN_WARNING
,
2214 "supports DRM functions and may "
2215 "not be fully accessable.\n");
2218 dev
->n_sectors
= ata_id_n_sectors(id
);
2220 if (dev
->id
[59] & 0x100)
2221 dev
->multi_count
= dev
->id
[59] & 0xff;
2223 if (ata_id_has_lba(id
)) {
2224 const char *lba_desc
;
2228 dev
->flags
|= ATA_DFLAG_LBA
;
2229 if (ata_id_has_lba48(id
)) {
2230 dev
->flags
|= ATA_DFLAG_LBA48
;
2233 if (dev
->n_sectors
>= (1UL << 28) &&
2234 ata_id_has_flush_ext(id
))
2235 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2239 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2241 /* print device info to dmesg */
2242 if (ata_msg_drv(ap
) && print_info
) {
2243 ata_dev_printk(dev
, KERN_INFO
,
2244 "%s: %s, %s, max %s\n",
2245 revbuf
, modelbuf
, fwrevbuf
,
2246 ata_mode_string(xfer_mask
));
2247 ata_dev_printk(dev
, KERN_INFO
,
2248 "%Lu sectors, multi %u: %s %s\n",
2249 (unsigned long long)dev
->n_sectors
,
2250 dev
->multi_count
, lba_desc
, ncq_desc
);
2255 /* Default translation */
2256 dev
->cylinders
= id
[1];
2258 dev
->sectors
= id
[6];
2260 if (ata_id_current_chs_valid(id
)) {
2261 /* Current CHS translation is valid. */
2262 dev
->cylinders
= id
[54];
2263 dev
->heads
= id
[55];
2264 dev
->sectors
= id
[56];
2267 /* print device info to dmesg */
2268 if (ata_msg_drv(ap
) && print_info
) {
2269 ata_dev_printk(dev
, KERN_INFO
,
2270 "%s: %s, %s, max %s\n",
2271 revbuf
, modelbuf
, fwrevbuf
,
2272 ata_mode_string(xfer_mask
));
2273 ata_dev_printk(dev
, KERN_INFO
,
2274 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2275 (unsigned long long)dev
->n_sectors
,
2276 dev
->multi_count
, dev
->cylinders
,
2277 dev
->heads
, dev
->sectors
);
2284 /* ATAPI-specific feature tests */
2285 else if (dev
->class == ATA_DEV_ATAPI
) {
2286 const char *cdb_intr_string
= "";
2287 const char *atapi_an_string
= "";
2288 const char *dma_dir_string
= "";
2291 rc
= atapi_cdb_len(id
);
2292 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2293 if (ata_msg_warn(ap
))
2294 ata_dev_printk(dev
, KERN_WARNING
,
2295 "unsupported CDB len\n");
2299 dev
->cdb_len
= (unsigned int) rc
;
2301 /* Enable ATAPI AN if both the host and device have
2302 * the support. If PMP is attached, SNTF is required
2303 * to enable ATAPI AN to discern between PHY status
2304 * changed notifications and ATAPI ANs.
2306 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2307 (!ap
->nr_pmp_links
||
2308 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2309 unsigned int err_mask
;
2311 /* issue SET feature command to turn this on */
2312 err_mask
= ata_dev_set_feature(dev
,
2313 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2315 ata_dev_printk(dev
, KERN_ERR
,
2316 "failed to enable ATAPI AN "
2317 "(err_mask=0x%x)\n", err_mask
);
2319 dev
->flags
|= ATA_DFLAG_AN
;
2320 atapi_an_string
= ", ATAPI AN";
2324 if (ata_id_cdb_intr(dev
->id
)) {
2325 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2326 cdb_intr_string
= ", CDB intr";
2329 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2330 dev
->flags
|= ATA_DFLAG_DMADIR
;
2331 dma_dir_string
= ", DMADIR";
2334 /* print device info to dmesg */
2335 if (ata_msg_drv(ap
) && print_info
)
2336 ata_dev_printk(dev
, KERN_INFO
,
2337 "ATAPI: %s, %s, max %s%s%s%s\n",
2339 ata_mode_string(xfer_mask
),
2340 cdb_intr_string
, atapi_an_string
,
2344 /* determine max_sectors */
2345 dev
->max_sectors
= ATA_MAX_SECTORS
;
2346 if (dev
->flags
& ATA_DFLAG_LBA48
)
2347 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2349 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2350 if (ata_id_has_hipm(dev
->id
))
2351 dev
->flags
|= ATA_DFLAG_HIPM
;
2352 if (ata_id_has_dipm(dev
->id
))
2353 dev
->flags
|= ATA_DFLAG_DIPM
;
2356 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2358 if (ata_dev_knobble(dev
)) {
2359 if (ata_msg_drv(ap
) && print_info
)
2360 ata_dev_printk(dev
, KERN_INFO
,
2361 "applying bridge limits\n");
2362 dev
->udma_mask
&= ATA_UDMA5
;
2363 dev
->max_sectors
= ATA_MAX_SECTORS
;
2366 if ((dev
->class == ATA_DEV_ATAPI
) &&
2367 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2368 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2369 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2372 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2373 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2376 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2377 dev
->horkage
|= ATA_HORKAGE_IPM
;
2379 /* reset link pm_policy for this port to no pm */
2380 ap
->pm_policy
= MAX_PERFORMANCE
;
2383 if (ap
->ops
->dev_config
)
2384 ap
->ops
->dev_config(dev
);
2386 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2387 /* Let the user know. We don't want to disallow opens for
2388 rescue purposes, or in case the vendor is just a blithering
2389 idiot. Do this after the dev_config call as some controllers
2390 with buggy firmware may want to avoid reporting false device
2394 ata_dev_printk(dev
, KERN_WARNING
,
2395 "Drive reports diagnostics failure. This may indicate a drive\n");
2396 ata_dev_printk(dev
, KERN_WARNING
,
2397 "fault or invalid emulation. Contact drive vendor for information.\n");
2404 if (ata_msg_probe(ap
))
2405 ata_dev_printk(dev
, KERN_DEBUG
,
2406 "%s: EXIT, err\n", __func__
);
2411 * ata_cable_40wire - return 40 wire cable type
2414 * Helper method for drivers which want to hardwire 40 wire cable
2418 int ata_cable_40wire(struct ata_port
*ap
)
2420 return ATA_CBL_PATA40
;
2424 * ata_cable_80wire - return 80 wire cable type
2427 * Helper method for drivers which want to hardwire 80 wire cable
2431 int ata_cable_80wire(struct ata_port
*ap
)
2433 return ATA_CBL_PATA80
;
2437 * ata_cable_unknown - return unknown PATA cable.
2440 * Helper method for drivers which have no PATA cable detection.
2443 int ata_cable_unknown(struct ata_port
*ap
)
2445 return ATA_CBL_PATA_UNK
;
2449 * ata_cable_ignore - return ignored PATA cable.
2452 * Helper method for drivers which don't use cable type to limit
2455 int ata_cable_ignore(struct ata_port
*ap
)
2457 return ATA_CBL_PATA_IGN
;
2461 * ata_cable_sata - return SATA cable type
2464 * Helper method for drivers which have SATA cables
2467 int ata_cable_sata(struct ata_port
*ap
)
2469 return ATA_CBL_SATA
;
2473 * ata_bus_probe - Reset and probe ATA bus
2476 * Master ATA bus probing function. Initiates a hardware-dependent
2477 * bus reset, then attempts to identify any devices found on
2481 * PCI/etc. bus probe sem.
2484 * Zero on success, negative errno otherwise.
2487 int ata_bus_probe(struct ata_port
*ap
)
2489 unsigned int classes
[ATA_MAX_DEVICES
];
2490 int tries
[ATA_MAX_DEVICES
];
2492 struct ata_device
*dev
;
2496 ata_link_for_each_dev(dev
, &ap
->link
)
2497 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2500 ata_link_for_each_dev(dev
, &ap
->link
) {
2501 /* If we issue an SRST then an ATA drive (not ATAPI)
2502 * may change configuration and be in PIO0 timing. If
2503 * we do a hard reset (or are coming from power on)
2504 * this is true for ATA or ATAPI. Until we've set a
2505 * suitable controller mode we should not touch the
2506 * bus as we may be talking too fast.
2508 dev
->pio_mode
= XFER_PIO_0
;
2510 /* If the controller has a pio mode setup function
2511 * then use it to set the chipset to rights. Don't
2512 * touch the DMA setup as that will be dealt with when
2513 * configuring devices.
2515 if (ap
->ops
->set_piomode
)
2516 ap
->ops
->set_piomode(ap
, dev
);
2519 /* reset and determine device classes */
2520 ap
->ops
->phy_reset(ap
);
2522 ata_link_for_each_dev(dev
, &ap
->link
) {
2523 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2524 dev
->class != ATA_DEV_UNKNOWN
)
2525 classes
[dev
->devno
] = dev
->class;
2527 classes
[dev
->devno
] = ATA_DEV_NONE
;
2529 dev
->class = ATA_DEV_UNKNOWN
;
2534 /* read IDENTIFY page and configure devices. We have to do the identify
2535 specific sequence bass-ackwards so that PDIAG- is released by
2538 ata_link_for_each_dev_reverse(dev
, &ap
->link
) {
2539 if (tries
[dev
->devno
])
2540 dev
->class = classes
[dev
->devno
];
2542 if (!ata_dev_enabled(dev
))
2545 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2551 /* Now ask for the cable type as PDIAG- should have been released */
2552 if (ap
->ops
->cable_detect
)
2553 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2555 /* We may have SATA bridge glue hiding here irrespective of the
2556 reported cable types and sensed types */
2557 ata_link_for_each_dev(dev
, &ap
->link
) {
2558 if (!ata_dev_enabled(dev
))
2560 /* SATA drives indicate we have a bridge. We don't know which
2561 end of the link the bridge is which is a problem */
2562 if (ata_id_is_sata(dev
->id
))
2563 ap
->cbl
= ATA_CBL_SATA
;
2566 /* After the identify sequence we can now set up the devices. We do
2567 this in the normal order so that the user doesn't get confused */
2569 ata_link_for_each_dev(dev
, &ap
->link
) {
2570 if (!ata_dev_enabled(dev
))
2573 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2574 rc
= ata_dev_configure(dev
);
2575 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2580 /* configure transfer mode */
2581 rc
= ata_set_mode(&ap
->link
, &dev
);
2585 ata_link_for_each_dev(dev
, &ap
->link
)
2586 if (ata_dev_enabled(dev
))
2589 /* no device present, disable port */
2590 ata_port_disable(ap
);
2594 tries
[dev
->devno
]--;
2598 /* eeek, something went very wrong, give up */
2599 tries
[dev
->devno
] = 0;
2603 /* give it just one more chance */
2604 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2606 if (tries
[dev
->devno
] == 1) {
2607 /* This is the last chance, better to slow
2608 * down than lose it.
2610 sata_down_spd_limit(&ap
->link
);
2611 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2615 if (!tries
[dev
->devno
])
2616 ata_dev_disable(dev
);
2622 * ata_port_probe - Mark port as enabled
2623 * @ap: Port for which we indicate enablement
2625 * Modify @ap data structure such that the system
2626 * thinks that the entire port is enabled.
2628 * LOCKING: host lock, or some other form of
2632 void ata_port_probe(struct ata_port
*ap
)
2634 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2638 * sata_print_link_status - Print SATA link status
2639 * @link: SATA link to printk link status about
2641 * This function prints link speed and status of a SATA link.
2646 void sata_print_link_status(struct ata_link
*link
)
2648 u32 sstatus
, scontrol
, tmp
;
2650 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2652 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2654 if (ata_link_online(link
)) {
2655 tmp
= (sstatus
>> 4) & 0xf;
2656 ata_link_printk(link
, KERN_INFO
,
2657 "SATA link up %s (SStatus %X SControl %X)\n",
2658 sata_spd_string(tmp
), sstatus
, scontrol
);
2660 ata_link_printk(link
, KERN_INFO
,
2661 "SATA link down (SStatus %X SControl %X)\n",
2667 * ata_dev_pair - return other device on cable
2670 * Obtain the other device on the same cable, or if none is
2671 * present NULL is returned
2674 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2676 struct ata_link
*link
= adev
->link
;
2677 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2678 if (!ata_dev_enabled(pair
))
2684 * ata_port_disable - Disable port.
2685 * @ap: Port to be disabled.
2687 * Modify @ap data structure such that the system
2688 * thinks that the entire port is disabled, and should
2689 * never attempt to probe or communicate with devices
2692 * LOCKING: host lock, or some other form of
2696 void ata_port_disable(struct ata_port
*ap
)
2698 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2699 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2700 ap
->flags
|= ATA_FLAG_DISABLED
;
2704 * sata_down_spd_limit - adjust SATA spd limit downward
2705 * @link: Link to adjust SATA spd limit for
2707 * Adjust SATA spd limit of @link downward. Note that this
2708 * function only adjusts the limit. The change must be applied
2709 * using sata_set_spd().
2712 * Inherited from caller.
2715 * 0 on success, negative errno on failure
2717 int sata_down_spd_limit(struct ata_link
*link
)
2719 u32 sstatus
, spd
, mask
;
2722 if (!sata_scr_valid(link
))
2725 /* If SCR can be read, use it to determine the current SPD.
2726 * If not, use cached value in link->sata_spd.
2728 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2730 spd
= (sstatus
>> 4) & 0xf;
2732 spd
= link
->sata_spd
;
2734 mask
= link
->sata_spd_limit
;
2738 /* unconditionally mask off the highest bit */
2739 highbit
= fls(mask
) - 1;
2740 mask
&= ~(1 << highbit
);
2742 /* Mask off all speeds higher than or equal to the current
2743 * one. Force 1.5Gbps if current SPD is not available.
2746 mask
&= (1 << (spd
- 1)) - 1;
2750 /* were we already at the bottom? */
2754 link
->sata_spd_limit
= mask
;
2756 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2757 sata_spd_string(fls(mask
)));
2762 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2764 struct ata_link
*host_link
= &link
->ap
->link
;
2765 u32 limit
, target
, spd
;
2767 limit
= link
->sata_spd_limit
;
2769 /* Don't configure downstream link faster than upstream link.
2770 * It doesn't speed up anything and some PMPs choke on such
2773 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2774 limit
&= (1 << host_link
->sata_spd
) - 1;
2776 if (limit
== UINT_MAX
)
2779 target
= fls(limit
);
2781 spd
= (*scontrol
>> 4) & 0xf;
2782 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2784 return spd
!= target
;
2788 * sata_set_spd_needed - is SATA spd configuration needed
2789 * @link: Link in question
2791 * Test whether the spd limit in SControl matches
2792 * @link->sata_spd_limit. This function is used to determine
2793 * whether hardreset is necessary to apply SATA spd
2797 * Inherited from caller.
2800 * 1 if SATA spd configuration is needed, 0 otherwise.
2802 int sata_set_spd_needed(struct ata_link
*link
)
2806 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2809 return __sata_set_spd_needed(link
, &scontrol
);
2813 * sata_set_spd - set SATA spd according to spd limit
2814 * @link: Link to set SATA spd for
2816 * Set SATA spd of @link according to sata_spd_limit.
2819 * Inherited from caller.
2822 * 0 if spd doesn't need to be changed, 1 if spd has been
2823 * changed. Negative errno if SCR registers are inaccessible.
2825 int sata_set_spd(struct ata_link
*link
)
2830 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2833 if (!__sata_set_spd_needed(link
, &scontrol
))
2836 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2843 * This mode timing computation functionality is ported over from
2844 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2847 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2848 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2849 * for UDMA6, which is currently supported only by Maxtor drives.
2851 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2854 static const struct ata_timing ata_timing
[] = {
2855 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2856 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2857 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2858 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2859 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2860 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2861 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2862 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2864 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2865 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2866 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2868 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2869 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2870 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2871 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2872 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2874 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2875 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2876 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2877 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2878 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2879 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2880 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2881 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2886 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2887 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2889 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2891 q
->setup
= EZ(t
->setup
* 1000, T
);
2892 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2893 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2894 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2895 q
->active
= EZ(t
->active
* 1000, T
);
2896 q
->recover
= EZ(t
->recover
* 1000, T
);
2897 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2898 q
->udma
= EZ(t
->udma
* 1000, UT
);
2901 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2902 struct ata_timing
*m
, unsigned int what
)
2904 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2905 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2906 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2907 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2908 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2909 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2910 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2911 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2914 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2916 const struct ata_timing
*t
= ata_timing
;
2918 while (xfer_mode
> t
->mode
)
2921 if (xfer_mode
== t
->mode
)
2926 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2927 struct ata_timing
*t
, int T
, int UT
)
2929 const struct ata_timing
*s
;
2930 struct ata_timing p
;
2936 if (!(s
= ata_timing_find_mode(speed
)))
2939 memcpy(t
, s
, sizeof(*s
));
2942 * If the drive is an EIDE drive, it can tell us it needs extended
2943 * PIO/MW_DMA cycle timing.
2946 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2947 memset(&p
, 0, sizeof(p
));
2948 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2949 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2950 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2951 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2952 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2954 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2958 * Convert the timing to bus clock counts.
2961 ata_timing_quantize(t
, t
, T
, UT
);
2964 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2965 * S.M.A.R.T * and some other commands. We have to ensure that the
2966 * DMA cycle timing is slower/equal than the fastest PIO timing.
2969 if (speed
> XFER_PIO_6
) {
2970 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2971 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2975 * Lengthen active & recovery time so that cycle time is correct.
2978 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2979 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2980 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2983 if (t
->active
+ t
->recover
< t
->cycle
) {
2984 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2985 t
->recover
= t
->cycle
- t
->active
;
2988 /* In a few cases quantisation may produce enough errors to
2989 leave t->cycle too low for the sum of active and recovery
2990 if so we must correct this */
2991 if (t
->active
+ t
->recover
> t
->cycle
)
2992 t
->cycle
= t
->active
+ t
->recover
;
2998 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2999 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3000 * @cycle: cycle duration in ns
3002 * Return matching xfer mode for @cycle. The returned mode is of
3003 * the transfer type specified by @xfer_shift. If @cycle is too
3004 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3005 * than the fastest known mode, the fasted mode is returned.
3011 * Matching xfer_mode, 0xff if no match found.
3013 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3015 u8 base_mode
= 0xff, last_mode
= 0xff;
3016 const struct ata_xfer_ent
*ent
;
3017 const struct ata_timing
*t
;
3019 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3020 if (ent
->shift
== xfer_shift
)
3021 base_mode
= ent
->base
;
3023 for (t
= ata_timing_find_mode(base_mode
);
3024 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3025 unsigned short this_cycle
;
3027 switch (xfer_shift
) {
3029 case ATA_SHIFT_MWDMA
:
3030 this_cycle
= t
->cycle
;
3032 case ATA_SHIFT_UDMA
:
3033 this_cycle
= t
->udma
;
3039 if (cycle
> this_cycle
)
3042 last_mode
= t
->mode
;
3049 * ata_down_xfermask_limit - adjust dev xfer masks downward
3050 * @dev: Device to adjust xfer masks
3051 * @sel: ATA_DNXFER_* selector
3053 * Adjust xfer masks of @dev downward. Note that this function
3054 * does not apply the change. Invoking ata_set_mode() afterwards
3055 * will apply the limit.
3058 * Inherited from caller.
3061 * 0 on success, negative errno on failure
3063 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3066 unsigned long orig_mask
, xfer_mask
;
3067 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3070 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3071 sel
&= ~ATA_DNXFER_QUIET
;
3073 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3076 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3079 case ATA_DNXFER_PIO
:
3080 highbit
= fls(pio_mask
) - 1;
3081 pio_mask
&= ~(1 << highbit
);
3084 case ATA_DNXFER_DMA
:
3086 highbit
= fls(udma_mask
) - 1;
3087 udma_mask
&= ~(1 << highbit
);
3090 } else if (mwdma_mask
) {
3091 highbit
= fls(mwdma_mask
) - 1;
3092 mwdma_mask
&= ~(1 << highbit
);
3098 case ATA_DNXFER_40C
:
3099 udma_mask
&= ATA_UDMA_MASK_40C
;
3102 case ATA_DNXFER_FORCE_PIO0
:
3104 case ATA_DNXFER_FORCE_PIO
:
3113 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3115 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3119 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3120 snprintf(buf
, sizeof(buf
), "%s:%s",
3121 ata_mode_string(xfer_mask
),
3122 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3124 snprintf(buf
, sizeof(buf
), "%s",
3125 ata_mode_string(xfer_mask
));
3127 ata_dev_printk(dev
, KERN_WARNING
,
3128 "limiting speed to %s\n", buf
);
3131 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3137 static int ata_dev_set_mode(struct ata_device
*dev
)
3139 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3140 const char *dev_err_whine
= "";
3141 int ign_dev_err
= 0;
3142 unsigned int err_mask
;
3145 dev
->flags
&= ~ATA_DFLAG_PIO
;
3146 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3147 dev
->flags
|= ATA_DFLAG_PIO
;
3149 err_mask
= ata_dev_set_xfermode(dev
);
3151 if (err_mask
& ~AC_ERR_DEV
)
3155 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3156 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3157 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3161 /* Old CFA may refuse this command, which is just fine */
3162 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& ata_id_is_cfa(dev
->id
))
3165 /* Some very old devices and some bad newer ones fail any kind of
3166 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3167 if (dev
->xfer_shift
== ATA_SHIFT_PIO
&& !ata_id_has_iordy(dev
->id
) &&
3168 dev
->pio_mode
<= XFER_PIO_2
)
3171 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3172 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3173 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3174 dev
->dma_mode
== XFER_MW_DMA_0
&&
3175 (dev
->id
[63] >> 8) & 1)
3178 /* if the device is actually configured correctly, ignore dev err */
3179 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3182 if (err_mask
& AC_ERR_DEV
) {
3186 dev_err_whine
= " (device error ignored)";
3189 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3190 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3192 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3193 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3199 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3200 "(err_mask=0x%x)\n", err_mask
);
3205 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3206 * @link: link on which timings will be programmed
3207 * @r_failed_dev: out parameter for failed device
3209 * Standard implementation of the function used to tune and set
3210 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3211 * ata_dev_set_mode() fails, pointer to the failing device is
3212 * returned in @r_failed_dev.
3215 * PCI/etc. bus probe sem.
3218 * 0 on success, negative errno otherwise
3221 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3223 struct ata_port
*ap
= link
->ap
;
3224 struct ata_device
*dev
;
3225 int rc
= 0, used_dma
= 0, found
= 0;
3227 /* step 1: calculate xfer_mask */
3228 ata_link_for_each_dev(dev
, link
) {
3229 unsigned long pio_mask
, dma_mask
;
3230 unsigned int mode_mask
;
3232 if (!ata_dev_enabled(dev
))
3235 mode_mask
= ATA_DMA_MASK_ATA
;
3236 if (dev
->class == ATA_DEV_ATAPI
)
3237 mode_mask
= ATA_DMA_MASK_ATAPI
;
3238 else if (ata_id_is_cfa(dev
->id
))
3239 mode_mask
= ATA_DMA_MASK_CFA
;
3241 ata_dev_xfermask(dev
);
3242 ata_force_xfermask(dev
);
3244 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3245 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3247 if (libata_dma_mask
& mode_mask
)
3248 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3252 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3253 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3256 if (dev
->dma_mode
!= 0xff)
3262 /* step 2: always set host PIO timings */
3263 ata_link_for_each_dev(dev
, link
) {
3264 if (!ata_dev_enabled(dev
))
3267 if (dev
->pio_mode
== 0xff) {
3268 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3273 dev
->xfer_mode
= dev
->pio_mode
;
3274 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3275 if (ap
->ops
->set_piomode
)
3276 ap
->ops
->set_piomode(ap
, dev
);
3279 /* step 3: set host DMA timings */
3280 ata_link_for_each_dev(dev
, link
) {
3281 if (!ata_dev_enabled(dev
) || dev
->dma_mode
== 0xff)
3284 dev
->xfer_mode
= dev
->dma_mode
;
3285 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3286 if (ap
->ops
->set_dmamode
)
3287 ap
->ops
->set_dmamode(ap
, dev
);
3290 /* step 4: update devices' xfer mode */
3291 ata_link_for_each_dev(dev
, link
) {
3292 /* don't update suspended devices' xfer mode */
3293 if (!ata_dev_enabled(dev
))
3296 rc
= ata_dev_set_mode(dev
);
3301 /* Record simplex status. If we selected DMA then the other
3302 * host channels are not permitted to do so.
3304 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3305 ap
->host
->simplex_claimed
= ap
;
3309 *r_failed_dev
= dev
;
3314 * ata_wait_ready - wait for link to become ready
3315 * @link: link to be waited on
3316 * @deadline: deadline jiffies for the operation
3317 * @check_ready: callback to check link readiness
3319 * Wait for @link to become ready. @check_ready should return
3320 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3321 * link doesn't seem to be occupied, other errno for other error
3324 * Transient -ENODEV conditions are allowed for
3325 * ATA_TMOUT_FF_WAIT.
3331 * 0 if @linke is ready before @deadline; otherwise, -errno.
3333 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3334 int (*check_ready
)(struct ata_link
*link
))
3336 unsigned long start
= jiffies
;
3337 unsigned long nodev_deadline
= start
+ ATA_TMOUT_FF_WAIT
;
3340 if (time_after(nodev_deadline
, deadline
))
3341 nodev_deadline
= deadline
;
3344 unsigned long now
= jiffies
;
3347 ready
= tmp
= check_ready(link
);
3351 /* -ENODEV could be transient. Ignore -ENODEV if link
3352 * is online. Also, some SATA devices take a long
3353 * time to clear 0xff after reset. For example,
3354 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3355 * GoVault needs even more than that. Wait for
3356 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3358 * Note that some PATA controllers (pata_ali) explode
3359 * if status register is read more than once when
3360 * there's no device attached.
3362 if (ready
== -ENODEV
) {
3363 if (ata_link_online(link
))
3365 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3366 !ata_link_offline(link
) &&
3367 time_before(now
, nodev_deadline
))
3373 if (time_after(now
, deadline
))
3376 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3377 (deadline
- now
> 3 * HZ
)) {
3378 ata_link_printk(link
, KERN_WARNING
,
3379 "link is slow to respond, please be patient "
3380 "(ready=%d)\n", tmp
);
3389 * ata_wait_after_reset - wait for link to become ready after reset
3390 * @link: link to be waited on
3391 * @deadline: deadline jiffies for the operation
3392 * @check_ready: callback to check link readiness
3394 * Wait for @link to become ready after reset.
3400 * 0 if @linke is ready before @deadline; otherwise, -errno.
3402 extern int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3403 int (*check_ready
)(struct ata_link
*link
))
3405 msleep(ATA_WAIT_AFTER_RESET_MSECS
);
3407 return ata_wait_ready(link
, deadline
, check_ready
);
3411 * sata_link_debounce - debounce SATA phy status
3412 * @link: ATA link to debounce SATA phy status for
3413 * @params: timing parameters { interval, duratinon, timeout } in msec
3414 * @deadline: deadline jiffies for the operation
3416 * Make sure SStatus of @link reaches stable state, determined by
3417 * holding the same value where DET is not 1 for @duration polled
3418 * every @interval, before @timeout. Timeout constraints the
3419 * beginning of the stable state. Because DET gets stuck at 1 on
3420 * some controllers after hot unplugging, this functions waits
3421 * until timeout then returns 0 if DET is stable at 1.
3423 * @timeout is further limited by @deadline. The sooner of the
3427 * Kernel thread context (may sleep)
3430 * 0 on success, -errno on failure.
3432 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3433 unsigned long deadline
)
3435 unsigned long interval_msec
= params
[0];
3436 unsigned long duration
= msecs_to_jiffies(params
[1]);
3437 unsigned long last_jiffies
, t
;
3441 t
= jiffies
+ msecs_to_jiffies(params
[2]);
3442 if (time_before(t
, deadline
))
3445 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3450 last_jiffies
= jiffies
;
3453 msleep(interval_msec
);
3454 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3460 if (cur
== 1 && time_before(jiffies
, deadline
))
3462 if (time_after(jiffies
, last_jiffies
+ duration
))
3467 /* unstable, start over */
3469 last_jiffies
= jiffies
;
3471 /* Check deadline. If debouncing failed, return
3472 * -EPIPE to tell upper layer to lower link speed.
3474 if (time_after(jiffies
, deadline
))
3480 * sata_link_resume - resume SATA link
3481 * @link: ATA link to resume SATA
3482 * @params: timing parameters { interval, duratinon, timeout } in msec
3483 * @deadline: deadline jiffies for the operation
3485 * Resume SATA phy @link and debounce it.
3488 * Kernel thread context (may sleep)
3491 * 0 on success, -errno on failure.
3493 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3494 unsigned long deadline
)
3496 u32 scontrol
, serror
;
3499 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3502 scontrol
= (scontrol
& 0x0f0) | 0x300;
3504 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3507 /* Some PHYs react badly if SStatus is pounded immediately
3508 * after resuming. Delay 200ms before debouncing.
3512 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3515 /* Clear SError. PMP and some host PHYs require this to
3516 * operate and clearing should be done before checking PHY
3517 * online status to avoid race condition (hotplugging between
3518 * link resume and status check).
3520 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3521 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3522 if (rc
== 0 || rc
== -EINVAL
) {
3523 unsigned long flags
;
3525 spin_lock_irqsave(link
->ap
->lock
, flags
);
3526 link
->eh_info
.serror
= 0;
3527 spin_unlock_irqrestore(link
->ap
->lock
, flags
);
3534 * ata_std_prereset - prepare for reset
3535 * @link: ATA link to be reset
3536 * @deadline: deadline jiffies for the operation
3538 * @link is about to be reset. Initialize it. Failure from
3539 * prereset makes libata abort whole reset sequence and give up
3540 * that port, so prereset should be best-effort. It does its
3541 * best to prepare for reset sequence but if things go wrong, it
3542 * should just whine, not fail.
3545 * Kernel thread context (may sleep)
3548 * 0 on success, -errno otherwise.
3550 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3552 struct ata_port
*ap
= link
->ap
;
3553 struct ata_eh_context
*ehc
= &link
->eh_context
;
3554 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3557 /* if we're about to do hardreset, nothing more to do */
3558 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3561 /* if SATA, resume link */
3562 if (ap
->flags
& ATA_FLAG_SATA
) {
3563 rc
= sata_link_resume(link
, timing
, deadline
);
3564 /* whine about phy resume failure but proceed */
3565 if (rc
&& rc
!= -EOPNOTSUPP
)
3566 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3567 "link for reset (errno=%d)\n", rc
);
3574 * sata_link_hardreset - reset link via SATA phy reset
3575 * @link: link to reset
3576 * @timing: timing parameters { interval, duratinon, timeout } in msec
3577 * @deadline: deadline jiffies for the operation
3578 * @online: optional out parameter indicating link onlineness
3579 * @check_ready: optional callback to check link readiness
3581 * SATA phy-reset @link using DET bits of SControl register.
3582 * After hardreset, link readiness is waited upon using
3583 * ata_wait_ready() if @check_ready is specified. LLDs are
3584 * allowed to not specify @check_ready and wait itself after this
3585 * function returns. Device classification is LLD's
3588 * *@online is set to one iff reset succeeded and @link is online
3592 * Kernel thread context (may sleep)
3595 * 0 on success, -errno otherwise.
3597 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3598 unsigned long deadline
,
3599 bool *online
, int (*check_ready
)(struct ata_link
*))
3609 if (sata_set_spd_needed(link
)) {
3610 /* SATA spec says nothing about how to reconfigure
3611 * spd. To be on the safe side, turn off phy during
3612 * reconfiguration. This works for at least ICH7 AHCI
3615 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3618 scontrol
= (scontrol
& 0x0f0) | 0x304;
3620 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3626 /* issue phy wake/reset */
3627 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3630 scontrol
= (scontrol
& 0x0f0) | 0x301;
3632 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3635 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3636 * 10.4.2 says at least 1 ms.
3640 /* bring link back */
3641 rc
= sata_link_resume(link
, timing
, deadline
);
3644 /* if link is offline nothing more to do */
3645 if (ata_link_offline(link
))
3648 /* Link is online. From this point, -ENODEV too is an error. */
3652 if ((link
->ap
->flags
& ATA_FLAG_PMP
) && ata_is_host_link(link
)) {
3653 /* If PMP is supported, we have to do follow-up SRST.
3654 * Some PMPs don't send D2H Reg FIS after hardreset if
3655 * the first port is empty. Wait only for
3656 * ATA_TMOUT_PMP_SRST_WAIT.
3659 unsigned long pmp_deadline
;
3661 pmp_deadline
= jiffies
+ ATA_TMOUT_PMP_SRST_WAIT
;
3662 if (time_after(pmp_deadline
, deadline
))
3663 pmp_deadline
= deadline
;
3664 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3672 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3674 if (rc
&& rc
!= -EAGAIN
)
3675 ata_link_printk(link
, KERN_ERR
,
3676 "COMRESET failed (errno=%d)\n", rc
);
3677 DPRINTK("EXIT, rc=%d\n", rc
);
3682 * sata_std_hardreset - COMRESET w/o waiting or classification
3683 * @link: link to reset
3684 * @class: resulting class of attached device
3685 * @deadline: deadline jiffies for the operation
3687 * Standard SATA COMRESET w/o waiting or classification.
3690 * Kernel thread context (may sleep)
3693 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3695 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3696 unsigned long deadline
)
3698 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3703 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3704 *class = ATA_DEV_NONE
;
3705 return online
? -EAGAIN
: rc
;
3709 * ata_std_postreset - standard postreset callback
3710 * @link: the target ata_link
3711 * @classes: classes of attached devices
3713 * This function is invoked after a successful reset. Note that
3714 * the device might have been reset more than once using
3715 * different reset methods before postreset is invoked.
3718 * Kernel thread context (may sleep)
3720 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3724 /* print link status */
3725 sata_print_link_status(link
);
3731 * ata_dev_same_device - Determine whether new ID matches configured device
3732 * @dev: device to compare against
3733 * @new_class: class of the new device
3734 * @new_id: IDENTIFY page of the new device
3736 * Compare @new_class and @new_id against @dev and determine
3737 * whether @dev is the device indicated by @new_class and
3744 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3746 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3749 const u16
*old_id
= dev
->id
;
3750 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3751 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3753 if (dev
->class != new_class
) {
3754 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3755 dev
->class, new_class
);
3759 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3760 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3761 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3762 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3764 if (strcmp(model
[0], model
[1])) {
3765 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3766 "'%s' != '%s'\n", model
[0], model
[1]);
3770 if (strcmp(serial
[0], serial
[1])) {
3771 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3772 "'%s' != '%s'\n", serial
[0], serial
[1]);
3780 * ata_dev_reread_id - Re-read IDENTIFY data
3781 * @dev: target ATA device
3782 * @readid_flags: read ID flags
3784 * Re-read IDENTIFY page and make sure @dev is still attached to
3788 * Kernel thread context (may sleep)
3791 * 0 on success, negative errno otherwise
3793 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3795 unsigned int class = dev
->class;
3796 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3800 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3804 /* is the device still there? */
3805 if (!ata_dev_same_device(dev
, class, id
))
3808 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3813 * ata_dev_revalidate - Revalidate ATA device
3814 * @dev: device to revalidate
3815 * @new_class: new class code
3816 * @readid_flags: read ID flags
3818 * Re-read IDENTIFY page, make sure @dev is still attached to the
3819 * port and reconfigure it according to the new IDENTIFY page.
3822 * Kernel thread context (may sleep)
3825 * 0 on success, negative errno otherwise
3827 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3828 unsigned int readid_flags
)
3830 u64 n_sectors
= dev
->n_sectors
;
3833 if (!ata_dev_enabled(dev
))
3836 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3837 if (ata_class_enabled(new_class
) &&
3838 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3839 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3840 dev
->class, new_class
);
3846 rc
= ata_dev_reread_id(dev
, readid_flags
);
3850 /* configure device according to the new ID */
3851 rc
= ata_dev_configure(dev
);
3855 /* verify n_sectors hasn't changed */
3856 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3857 dev
->n_sectors
!= n_sectors
) {
3858 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3860 (unsigned long long)n_sectors
,
3861 (unsigned long long)dev
->n_sectors
);
3863 /* restore original n_sectors */
3864 dev
->n_sectors
= n_sectors
;
3873 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3877 struct ata_blacklist_entry
{
3878 const char *model_num
;
3879 const char *model_rev
;
3880 unsigned long horkage
;
3883 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3884 /* Devices with DMA related problems under Linux */
3885 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3886 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3887 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3888 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3889 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3890 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3891 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3892 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3893 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3894 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3895 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3896 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3897 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3898 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3899 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3900 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3901 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3902 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3903 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3904 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3905 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3906 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3907 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3908 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3909 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3910 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3911 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3912 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3913 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3914 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3915 /* Odd clown on sil3726/4726 PMPs */
3916 { "Config Disk", NULL
, ATA_HORKAGE_NODMA
|
3917 ATA_HORKAGE_SKIP_PM
},
3919 /* Weird ATAPI devices */
3920 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3922 /* Devices we expect to fail diagnostics */
3924 /* Devices where NCQ should be avoided */
3926 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3927 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3928 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3929 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3931 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3932 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3933 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3934 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3936 /* Blacklist entries taken from Silicon Image 3124/3132
3937 Windows driver .inf file - also several Linux problem reports */
3938 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
3939 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
3940 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
3942 /* devices which puke on READ_NATIVE_MAX */
3943 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
3944 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
3945 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
3946 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
3948 /* Devices which report 1 sector over size HPA */
3949 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3950 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3951 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
3953 /* Devices which get the IVB wrong */
3954 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
3955 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
3956 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
3957 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
3958 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
3964 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
3970 * check for trailing wildcard: *\0
3972 p
= strchr(patt
, wildchar
);
3973 if (p
&& ((*(p
+ 1)) == 0))
3984 return strncmp(patt
, name
, len
);
3987 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
3989 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
3990 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
3991 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
3993 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
3994 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
3996 while (ad
->model_num
) {
3997 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
3998 if (ad
->model_rev
== NULL
)
4000 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4008 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4010 /* We don't support polling DMA.
4011 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4012 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4014 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4015 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4017 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4021 * ata_is_40wire - check drive side detection
4024 * Perform drive side detection decoding, allowing for device vendors
4025 * who can't follow the documentation.
4028 static int ata_is_40wire(struct ata_device
*dev
)
4030 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4031 return ata_drive_40wire_relaxed(dev
->id
);
4032 return ata_drive_40wire(dev
->id
);
4036 * cable_is_40wire - 40/80/SATA decider
4037 * @ap: port to consider
4039 * This function encapsulates the policy for speed management
4040 * in one place. At the moment we don't cache the result but
4041 * there is a good case for setting ap->cbl to the result when
4042 * we are called with unknown cables (and figuring out if it
4043 * impacts hotplug at all).
4045 * Return 1 if the cable appears to be 40 wire.
4048 static int cable_is_40wire(struct ata_port
*ap
)
4050 struct ata_link
*link
;
4051 struct ata_device
*dev
;
4053 /* If the controller thinks we are 40 wire, we are */
4054 if (ap
->cbl
== ATA_CBL_PATA40
)
4056 /* If the controller thinks we are 80 wire, we are */
4057 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4059 /* If the controller doesn't know we scan
4061 - Note: We look for all 40 wire detects at this point.
4062 Any 80 wire detect is taken to be 80 wire cable
4064 - In many setups only the one drive (slave if present)
4065 will give a valid detect
4066 - If you have a non detect capable drive you don't
4067 want it to colour the choice
4069 ata_port_for_each_link(link
, ap
) {
4070 ata_link_for_each_dev(dev
, link
) {
4071 if (!ata_is_40wire(dev
))
4079 * ata_dev_xfermask - Compute supported xfermask of the given device
4080 * @dev: Device to compute xfermask for
4082 * Compute supported xfermask of @dev and store it in
4083 * dev->*_mask. This function is responsible for applying all
4084 * known limits including host controller limits, device
4090 static void ata_dev_xfermask(struct ata_device
*dev
)
4092 struct ata_link
*link
= dev
->link
;
4093 struct ata_port
*ap
= link
->ap
;
4094 struct ata_host
*host
= ap
->host
;
4095 unsigned long xfer_mask
;
4097 /* controller modes available */
4098 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4099 ap
->mwdma_mask
, ap
->udma_mask
);
4101 /* drive modes available */
4102 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4103 dev
->mwdma_mask
, dev
->udma_mask
);
4104 xfer_mask
&= ata_id_xfermask(dev
->id
);
4107 * CFA Advanced TrueIDE timings are not allowed on a shared
4110 if (ata_dev_pair(dev
)) {
4111 /* No PIO5 or PIO6 */
4112 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4113 /* No MWDMA3 or MWDMA 4 */
4114 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4117 if (ata_dma_blacklisted(dev
)) {
4118 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4119 ata_dev_printk(dev
, KERN_WARNING
,
4120 "device is on DMA blacklist, disabling DMA\n");
4123 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4124 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4125 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4126 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4127 "other device, disabling DMA\n");
4130 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4131 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4133 if (ap
->ops
->mode_filter
)
4134 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4136 /* Apply cable rule here. Don't apply it early because when
4137 * we handle hot plug the cable type can itself change.
4138 * Check this last so that we know if the transfer rate was
4139 * solely limited by the cable.
4140 * Unknown or 80 wire cables reported host side are checked
4141 * drive side as well. Cases where we know a 40wire cable
4142 * is used safely for 80 are not checked here.
4144 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4145 /* UDMA/44 or higher would be available */
4146 if (cable_is_40wire(ap
)) {
4147 ata_dev_printk(dev
, KERN_WARNING
,
4148 "limited to UDMA/33 due to 40-wire cable\n");
4149 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4152 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4153 &dev
->mwdma_mask
, &dev
->udma_mask
);
4157 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4158 * @dev: Device to which command will be sent
4160 * Issue SET FEATURES - XFER MODE command to device @dev
4164 * PCI/etc. bus probe sem.
4167 * 0 on success, AC_ERR_* mask otherwise.
4170 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4172 struct ata_taskfile tf
;
4173 unsigned int err_mask
;
4175 /* set up set-features taskfile */
4176 DPRINTK("set features - xfer mode\n");
4178 /* Some controllers and ATAPI devices show flaky interrupt
4179 * behavior after setting xfer mode. Use polling instead.
4181 ata_tf_init(dev
, &tf
);
4182 tf
.command
= ATA_CMD_SET_FEATURES
;
4183 tf
.feature
= SETFEATURES_XFER
;
4184 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4185 tf
.protocol
= ATA_PROT_NODATA
;
4186 /* If we are using IORDY we must send the mode setting command */
4187 if (ata_pio_need_iordy(dev
))
4188 tf
.nsect
= dev
->xfer_mode
;
4189 /* If the device has IORDY and the controller does not - turn it off */
4190 else if (ata_id_has_iordy(dev
->id
))
4192 else /* In the ancient relic department - skip all of this */
4195 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4197 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4201 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4202 * @dev: Device to which command will be sent
4203 * @enable: Whether to enable or disable the feature
4204 * @feature: The sector count represents the feature to set
4206 * Issue SET FEATURES - SATA FEATURES command to device @dev
4207 * on port @ap with sector count
4210 * PCI/etc. bus probe sem.
4213 * 0 on success, AC_ERR_* mask otherwise.
4215 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4218 struct ata_taskfile tf
;
4219 unsigned int err_mask
;
4221 /* set up set-features taskfile */
4222 DPRINTK("set features - SATA features\n");
4224 ata_tf_init(dev
, &tf
);
4225 tf
.command
= ATA_CMD_SET_FEATURES
;
4226 tf
.feature
= enable
;
4227 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4228 tf
.protocol
= ATA_PROT_NODATA
;
4231 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4233 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4238 * ata_dev_init_params - Issue INIT DEV PARAMS command
4239 * @dev: Device to which command will be sent
4240 * @heads: Number of heads (taskfile parameter)
4241 * @sectors: Number of sectors (taskfile parameter)
4244 * Kernel thread context (may sleep)
4247 * 0 on success, AC_ERR_* mask otherwise.
4249 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4250 u16 heads
, u16 sectors
)
4252 struct ata_taskfile tf
;
4253 unsigned int err_mask
;
4255 /* Number of sectors per track 1-255. Number of heads 1-16 */
4256 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4257 return AC_ERR_INVALID
;
4259 /* set up init dev params taskfile */
4260 DPRINTK("init dev params \n");
4262 ata_tf_init(dev
, &tf
);
4263 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4264 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4265 tf
.protocol
= ATA_PROT_NODATA
;
4267 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4269 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4270 /* A clean abort indicates an original or just out of spec drive
4271 and we should continue as we issue the setup based on the
4272 drive reported working geometry */
4273 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4276 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4281 * ata_sg_clean - Unmap DMA memory associated with command
4282 * @qc: Command containing DMA memory to be released
4284 * Unmap all mapped DMA memory associated with this command.
4287 * spin_lock_irqsave(host lock)
4289 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4291 struct ata_port
*ap
= qc
->ap
;
4292 struct scatterlist
*sg
= qc
->sg
;
4293 int dir
= qc
->dma_dir
;
4295 WARN_ON(sg
== NULL
);
4297 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4300 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4302 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4307 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4308 * @qc: Metadata associated with taskfile to check
4310 * Allow low-level driver to filter ATA PACKET commands, returning
4311 * a status indicating whether or not it is OK to use DMA for the
4312 * supplied PACKET command.
4315 * spin_lock_irqsave(host lock)
4317 * RETURNS: 0 when ATAPI DMA can be used
4320 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
4322 struct ata_port
*ap
= qc
->ap
;
4324 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4325 * few ATAPI devices choke on such DMA requests.
4327 if (unlikely(qc
->nbytes
& 15))
4330 if (ap
->ops
->check_atapi_dma
)
4331 return ap
->ops
->check_atapi_dma(qc
);
4337 * ata_std_qc_defer - Check whether a qc needs to be deferred
4338 * @qc: ATA command in question
4340 * Non-NCQ commands cannot run with any other command, NCQ or
4341 * not. As upper layer only knows the queue depth, we are
4342 * responsible for maintaining exclusion. This function checks
4343 * whether a new command @qc can be issued.
4346 * spin_lock_irqsave(host lock)
4349 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4351 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4353 struct ata_link
*link
= qc
->dev
->link
;
4355 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4356 if (!ata_tag_valid(link
->active_tag
))
4359 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4363 return ATA_DEFER_LINK
;
4366 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4369 * ata_sg_init - Associate command with scatter-gather table.
4370 * @qc: Command to be associated
4371 * @sg: Scatter-gather table.
4372 * @n_elem: Number of elements in s/g table.
4374 * Initialize the data-related elements of queued_cmd @qc
4375 * to point to a scatter-gather table @sg, containing @n_elem
4379 * spin_lock_irqsave(host lock)
4381 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4382 unsigned int n_elem
)
4385 qc
->n_elem
= n_elem
;
4390 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4391 * @qc: Command with scatter-gather table to be mapped.
4393 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4396 * spin_lock_irqsave(host lock)
4399 * Zero on success, negative on error.
4402 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4404 struct ata_port
*ap
= qc
->ap
;
4405 unsigned int n_elem
;
4407 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4409 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4413 DPRINTK("%d sg elements mapped\n", n_elem
);
4415 qc
->n_elem
= n_elem
;
4416 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4422 * swap_buf_le16 - swap halves of 16-bit words in place
4423 * @buf: Buffer to swap
4424 * @buf_words: Number of 16-bit words in buffer.
4426 * Swap halves of 16-bit words if needed to convert from
4427 * little-endian byte order to native cpu byte order, or
4431 * Inherited from caller.
4433 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4438 for (i
= 0; i
< buf_words
; i
++)
4439 buf
[i
] = le16_to_cpu(buf
[i
]);
4440 #endif /* __BIG_ENDIAN */
4444 * ata_qc_new - Request an available ATA command, for queueing
4445 * @ap: Port associated with device @dev
4446 * @dev: Device from whom we request an available command structure
4452 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4454 struct ata_queued_cmd
*qc
= NULL
;
4457 /* no command while frozen */
4458 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4461 /* the last tag is reserved for internal command. */
4462 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4463 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4464 qc
= __ata_qc_from_tag(ap
, i
);
4475 * ata_qc_new_init - Request an available ATA command, and initialize it
4476 * @dev: Device from whom we request an available command structure
4482 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4484 struct ata_port
*ap
= dev
->link
->ap
;
4485 struct ata_queued_cmd
*qc
;
4487 qc
= ata_qc_new(ap
);
4500 * ata_qc_free - free unused ata_queued_cmd
4501 * @qc: Command to complete
4503 * Designed to free unused ata_queued_cmd object
4504 * in case something prevents using it.
4507 * spin_lock_irqsave(host lock)
4509 void ata_qc_free(struct ata_queued_cmd
*qc
)
4511 struct ata_port
*ap
= qc
->ap
;
4514 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4518 if (likely(ata_tag_valid(tag
))) {
4519 qc
->tag
= ATA_TAG_POISON
;
4520 clear_bit(tag
, &ap
->qc_allocated
);
4524 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4526 struct ata_port
*ap
= qc
->ap
;
4527 struct ata_link
*link
= qc
->dev
->link
;
4529 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4530 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4532 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4535 /* command should be marked inactive atomically with qc completion */
4536 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4537 link
->sactive
&= ~(1 << qc
->tag
);
4539 ap
->nr_active_links
--;
4541 link
->active_tag
= ATA_TAG_POISON
;
4542 ap
->nr_active_links
--;
4545 /* clear exclusive status */
4546 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4547 ap
->excl_link
== link
))
4548 ap
->excl_link
= NULL
;
4550 /* atapi: mark qc as inactive to prevent the interrupt handler
4551 * from completing the command twice later, before the error handler
4552 * is called. (when rc != 0 and atapi request sense is needed)
4554 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4555 ap
->qc_active
&= ~(1 << qc
->tag
);
4557 /* call completion callback */
4558 qc
->complete_fn(qc
);
4561 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4563 struct ata_port
*ap
= qc
->ap
;
4565 qc
->result_tf
.flags
= qc
->tf
.flags
;
4566 ap
->ops
->sff_tf_read(ap
, &qc
->result_tf
);
4569 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4571 struct ata_device
*dev
= qc
->dev
;
4573 if (ata_tag_internal(qc
->tag
))
4576 if (ata_is_nodata(qc
->tf
.protocol
))
4579 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4582 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4586 * ata_qc_complete - Complete an active ATA command
4587 * @qc: Command to complete
4588 * @err_mask: ATA Status register contents
4590 * Indicate to the mid and upper layers that an ATA
4591 * command has completed, with either an ok or not-ok status.
4594 * spin_lock_irqsave(host lock)
4596 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4598 struct ata_port
*ap
= qc
->ap
;
4600 /* XXX: New EH and old EH use different mechanisms to
4601 * synchronize EH with regular execution path.
4603 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4604 * Normal execution path is responsible for not accessing a
4605 * failed qc. libata core enforces the rule by returning NULL
4606 * from ata_qc_from_tag() for failed qcs.
4608 * Old EH depends on ata_qc_complete() nullifying completion
4609 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4610 * not synchronize with interrupt handler. Only PIO task is
4613 if (ap
->ops
->error_handler
) {
4614 struct ata_device
*dev
= qc
->dev
;
4615 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4617 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4619 if (unlikely(qc
->err_mask
))
4620 qc
->flags
|= ATA_QCFLAG_FAILED
;
4622 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4623 if (!ata_tag_internal(qc
->tag
)) {
4624 /* always fill result TF for failed qc */
4626 ata_qc_schedule_eh(qc
);
4631 /* read result TF if requested */
4632 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4635 /* Some commands need post-processing after successful
4638 switch (qc
->tf
.command
) {
4639 case ATA_CMD_SET_FEATURES
:
4640 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4641 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4644 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4645 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4646 /* revalidate device */
4647 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4648 ata_port_schedule_eh(ap
);
4652 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4656 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4657 ata_verify_xfer(qc
);
4659 __ata_qc_complete(qc
);
4661 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4664 /* read result TF if failed or requested */
4665 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4668 __ata_qc_complete(qc
);
4673 * ata_qc_complete_multiple - Complete multiple qcs successfully
4674 * @ap: port in question
4675 * @qc_active: new qc_active mask
4676 * @finish_qc: LLDD callback invoked before completing a qc
4678 * Complete in-flight commands. This functions is meant to be
4679 * called from low-level driver's interrupt routine to complete
4680 * requests normally. ap->qc_active and @qc_active is compared
4681 * and commands are completed accordingly.
4684 * spin_lock_irqsave(host lock)
4687 * Number of completed commands on success, -errno otherwise.
4689 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
4690 void (*finish_qc
)(struct ata_queued_cmd
*))
4696 done_mask
= ap
->qc_active
^ qc_active
;
4698 if (unlikely(done_mask
& qc_active
)) {
4699 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4700 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4704 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4705 struct ata_queued_cmd
*qc
;
4707 if (!(done_mask
& (1 << i
)))
4710 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4713 ata_qc_complete(qc
);
4722 * ata_qc_issue - issue taskfile to device
4723 * @qc: command to issue to device
4725 * Prepare an ATA command to submission to device.
4726 * This includes mapping the data into a DMA-able
4727 * area, filling in the S/G table, and finally
4728 * writing the taskfile to hardware, starting the command.
4731 * spin_lock_irqsave(host lock)
4733 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4735 struct ata_port
*ap
= qc
->ap
;
4736 struct ata_link
*link
= qc
->dev
->link
;
4737 u8 prot
= qc
->tf
.protocol
;
4739 /* Make sure only one non-NCQ command is outstanding. The
4740 * check is skipped for old EH because it reuses active qc to
4741 * request ATAPI sense.
4743 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4745 if (ata_is_ncq(prot
)) {
4746 WARN_ON(link
->sactive
& (1 << qc
->tag
));
4749 ap
->nr_active_links
++;
4750 link
->sactive
|= 1 << qc
->tag
;
4752 WARN_ON(link
->sactive
);
4754 ap
->nr_active_links
++;
4755 link
->active_tag
= qc
->tag
;
4758 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4759 ap
->qc_active
|= 1 << qc
->tag
;
4761 /* We guarantee to LLDs that they will have at least one
4762 * non-zero sg if the command is a data command.
4764 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
4766 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4767 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4768 if (ata_sg_setup(qc
))
4771 /* if device is sleeping, schedule reset and abort the link */
4772 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4773 link
->eh_info
.action
|= ATA_EH_RESET
;
4774 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4775 ata_link_abort(link
);
4779 ap
->ops
->qc_prep(qc
);
4781 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4782 if (unlikely(qc
->err_mask
))
4787 qc
->err_mask
|= AC_ERR_SYSTEM
;
4789 ata_qc_complete(qc
);
4793 * sata_scr_valid - test whether SCRs are accessible
4794 * @link: ATA link to test SCR accessibility for
4796 * Test whether SCRs are accessible for @link.
4802 * 1 if SCRs are accessible, 0 otherwise.
4804 int sata_scr_valid(struct ata_link
*link
)
4806 struct ata_port
*ap
= link
->ap
;
4808 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
4812 * sata_scr_read - read SCR register of the specified port
4813 * @link: ATA link to read SCR for
4815 * @val: Place to store read value
4817 * Read SCR register @reg of @link into *@val. This function is
4818 * guaranteed to succeed if @link is ap->link, the cable type of
4819 * the port is SATA and the port implements ->scr_read.
4822 * None if @link is ap->link. Kernel thread context otherwise.
4825 * 0 on success, negative errno on failure.
4827 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
4829 if (ata_is_host_link(link
)) {
4830 struct ata_port
*ap
= link
->ap
;
4832 if (sata_scr_valid(link
))
4833 return ap
->ops
->scr_read(ap
, reg
, val
);
4837 return sata_pmp_scr_read(link
, reg
, val
);
4841 * sata_scr_write - write SCR register of the specified port
4842 * @link: ATA link to write SCR for
4843 * @reg: SCR to write
4844 * @val: value to write
4846 * Write @val to SCR register @reg of @link. This function is
4847 * guaranteed to succeed if @link is ap->link, the cable type of
4848 * the port is SATA and the port implements ->scr_read.
4851 * None if @link is ap->link. Kernel thread context otherwise.
4854 * 0 on success, negative errno on failure.
4856 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
4858 if (ata_is_host_link(link
)) {
4859 struct ata_port
*ap
= link
->ap
;
4861 if (sata_scr_valid(link
))
4862 return ap
->ops
->scr_write(ap
, reg
, val
);
4866 return sata_pmp_scr_write(link
, reg
, val
);
4870 * sata_scr_write_flush - write SCR register of the specified port and flush
4871 * @link: ATA link to write SCR for
4872 * @reg: SCR to write
4873 * @val: value to write
4875 * This function is identical to sata_scr_write() except that this
4876 * function performs flush after writing to the register.
4879 * None if @link is ap->link. Kernel thread context otherwise.
4882 * 0 on success, negative errno on failure.
4884 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
4886 if (ata_is_host_link(link
)) {
4887 struct ata_port
*ap
= link
->ap
;
4890 if (sata_scr_valid(link
)) {
4891 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
4893 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
4899 return sata_pmp_scr_write(link
, reg
, val
);
4903 * ata_link_online - test whether the given link is online
4904 * @link: ATA link to test
4906 * Test whether @link is online. Note that this function returns
4907 * 0 if online status of @link cannot be obtained, so
4908 * ata_link_online(link) != !ata_link_offline(link).
4914 * 1 if the port online status is available and online.
4916 int ata_link_online(struct ata_link
*link
)
4920 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4921 (sstatus
& 0xf) == 0x3)
4927 * ata_link_offline - test whether the given link is offline
4928 * @link: ATA link to test
4930 * Test whether @link is offline. Note that this function
4931 * returns 0 if offline status of @link cannot be obtained, so
4932 * ata_link_online(link) != !ata_link_offline(link).
4938 * 1 if the port offline status is available and offline.
4940 int ata_link_offline(struct ata_link
*link
)
4944 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
4945 (sstatus
& 0xf) != 0x3)
4951 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
4952 unsigned int action
, unsigned int ehi_flags
,
4955 unsigned long flags
;
4958 for (i
= 0; i
< host
->n_ports
; i
++) {
4959 struct ata_port
*ap
= host
->ports
[i
];
4960 struct ata_link
*link
;
4962 /* Previous resume operation might still be in
4963 * progress. Wait for PM_PENDING to clear.
4965 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
4966 ata_port_wait_eh(ap
);
4967 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
4970 /* request PM ops to EH */
4971 spin_lock_irqsave(ap
->lock
, flags
);
4976 ap
->pm_result
= &rc
;
4979 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
4980 __ata_port_for_each_link(link
, ap
) {
4981 link
->eh_info
.action
|= action
;
4982 link
->eh_info
.flags
|= ehi_flags
;
4985 ata_port_schedule_eh(ap
);
4987 spin_unlock_irqrestore(ap
->lock
, flags
);
4989 /* wait and check result */
4991 ata_port_wait_eh(ap
);
4992 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5002 * ata_host_suspend - suspend host
5003 * @host: host to suspend
5006 * Suspend @host. Actual operation is performed by EH. This
5007 * function requests EH to perform PM operations and waits for EH
5011 * Kernel thread context (may sleep).
5014 * 0 on success, -errno on failure.
5016 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5021 * disable link pm on all ports before requesting
5024 ata_lpm_enable(host
);
5026 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5028 host
->dev
->power
.power_state
= mesg
;
5033 * ata_host_resume - resume host
5034 * @host: host to resume
5036 * Resume @host. Actual operation is performed by EH. This
5037 * function requests EH to perform PM operations and returns.
5038 * Note that all resume operations are performed parallely.
5041 * Kernel thread context (may sleep).
5043 void ata_host_resume(struct ata_host
*host
)
5045 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
5046 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5047 host
->dev
->power
.power_state
= PMSG_ON
;
5049 /* reenable link pm */
5050 ata_lpm_disable(host
);
5055 * ata_port_start - Set port up for dma.
5056 * @ap: Port to initialize
5058 * Called just after data structures for each port are
5059 * initialized. Allocates space for PRD table.
5061 * May be used as the port_start() entry in ata_port_operations.
5064 * Inherited from caller.
5066 int ata_port_start(struct ata_port
*ap
)
5068 struct device
*dev
= ap
->dev
;
5070 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5079 * ata_dev_init - Initialize an ata_device structure
5080 * @dev: Device structure to initialize
5082 * Initialize @dev in preparation for probing.
5085 * Inherited from caller.
5087 void ata_dev_init(struct ata_device
*dev
)
5089 struct ata_link
*link
= dev
->link
;
5090 struct ata_port
*ap
= link
->ap
;
5091 unsigned long flags
;
5093 /* SATA spd limit is bound to the first device */
5094 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5097 /* High bits of dev->flags are used to record warm plug
5098 * requests which occur asynchronously. Synchronize using
5101 spin_lock_irqsave(ap
->lock
, flags
);
5102 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5104 spin_unlock_irqrestore(ap
->lock
, flags
);
5106 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5107 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5108 dev
->pio_mask
= UINT_MAX
;
5109 dev
->mwdma_mask
= UINT_MAX
;
5110 dev
->udma_mask
= UINT_MAX
;
5114 * ata_link_init - Initialize an ata_link structure
5115 * @ap: ATA port link is attached to
5116 * @link: Link structure to initialize
5117 * @pmp: Port multiplier port number
5122 * Kernel thread context (may sleep)
5124 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5128 /* clear everything except for devices */
5129 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
5133 link
->active_tag
= ATA_TAG_POISON
;
5134 link
->hw_sata_spd_limit
= UINT_MAX
;
5136 /* can't use iterator, ap isn't initialized yet */
5137 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5138 struct ata_device
*dev
= &link
->device
[i
];
5141 dev
->devno
= dev
- link
->device
;
5147 * sata_link_init_spd - Initialize link->sata_spd_limit
5148 * @link: Link to configure sata_spd_limit for
5150 * Initialize @link->[hw_]sata_spd_limit to the currently
5154 * Kernel thread context (may sleep).
5157 * 0 on success, -errno on failure.
5159 int sata_link_init_spd(struct ata_link
*link
)
5165 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
5169 spd
= (scontrol
>> 4) & 0xf;
5171 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5173 ata_force_spd_limit(link
);
5175 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5181 * ata_port_alloc - allocate and initialize basic ATA port resources
5182 * @host: ATA host this allocated port belongs to
5184 * Allocate and initialize basic ATA port resources.
5187 * Allocate ATA port on success, NULL on failure.
5190 * Inherited from calling layer (may sleep).
5192 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5194 struct ata_port
*ap
;
5198 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5202 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5203 ap
->lock
= &host
->lock
;
5204 ap
->flags
= ATA_FLAG_DISABLED
;
5206 ap
->ctl
= ATA_DEVCTL_OBS
;
5208 ap
->dev
= host
->dev
;
5209 ap
->last_ctl
= 0xFF;
5211 #if defined(ATA_VERBOSE_DEBUG)
5212 /* turn on all debugging levels */
5213 ap
->msg_enable
= 0x00FF;
5214 #elif defined(ATA_DEBUG)
5215 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5217 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5220 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
5221 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5222 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5223 INIT_LIST_HEAD(&ap
->eh_done_q
);
5224 init_waitqueue_head(&ap
->eh_wait_q
);
5225 init_timer_deferrable(&ap
->fastdrain_timer
);
5226 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5227 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5229 ap
->cbl
= ATA_CBL_NONE
;
5231 ata_link_init(ap
, &ap
->link
, 0);
5234 ap
->stats
.unhandled_irq
= 1;
5235 ap
->stats
.idle_irq
= 1;
5240 static void ata_host_release(struct device
*gendev
, void *res
)
5242 struct ata_host
*host
= dev_get_drvdata(gendev
);
5245 for (i
= 0; i
< host
->n_ports
; i
++) {
5246 struct ata_port
*ap
= host
->ports
[i
];
5252 scsi_host_put(ap
->scsi_host
);
5254 kfree(ap
->pmp_link
);
5256 host
->ports
[i
] = NULL
;
5259 dev_set_drvdata(gendev
, NULL
);
5263 * ata_host_alloc - allocate and init basic ATA host resources
5264 * @dev: generic device this host is associated with
5265 * @max_ports: maximum number of ATA ports associated with this host
5267 * Allocate and initialize basic ATA host resources. LLD calls
5268 * this function to allocate a host, initializes it fully and
5269 * attaches it using ata_host_register().
5271 * @max_ports ports are allocated and host->n_ports is
5272 * initialized to @max_ports. The caller is allowed to decrease
5273 * host->n_ports before calling ata_host_register(). The unused
5274 * ports will be automatically freed on registration.
5277 * Allocate ATA host on success, NULL on failure.
5280 * Inherited from calling layer (may sleep).
5282 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5284 struct ata_host
*host
;
5290 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5293 /* alloc a container for our list of ATA ports (buses) */
5294 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5295 /* alloc a container for our list of ATA ports (buses) */
5296 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5300 devres_add(dev
, host
);
5301 dev_set_drvdata(dev
, host
);
5303 spin_lock_init(&host
->lock
);
5305 host
->n_ports
= max_ports
;
5307 /* allocate ports bound to this host */
5308 for (i
= 0; i
< max_ports
; i
++) {
5309 struct ata_port
*ap
;
5311 ap
= ata_port_alloc(host
);
5316 host
->ports
[i
] = ap
;
5319 devres_remove_group(dev
, NULL
);
5323 devres_release_group(dev
, NULL
);
5328 * ata_host_alloc_pinfo - alloc host and init with port_info array
5329 * @dev: generic device this host is associated with
5330 * @ppi: array of ATA port_info to initialize host with
5331 * @n_ports: number of ATA ports attached to this host
5333 * Allocate ATA host and initialize with info from @ppi. If NULL
5334 * terminated, @ppi may contain fewer entries than @n_ports. The
5335 * last entry will be used for the remaining ports.
5338 * Allocate ATA host on success, NULL on failure.
5341 * Inherited from calling layer (may sleep).
5343 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5344 const struct ata_port_info
* const * ppi
,
5347 const struct ata_port_info
*pi
;
5348 struct ata_host
*host
;
5351 host
= ata_host_alloc(dev
, n_ports
);
5355 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5356 struct ata_port
*ap
= host
->ports
[i
];
5361 ap
->pio_mask
= pi
->pio_mask
;
5362 ap
->mwdma_mask
= pi
->mwdma_mask
;
5363 ap
->udma_mask
= pi
->udma_mask
;
5364 ap
->flags
|= pi
->flags
;
5365 ap
->link
.flags
|= pi
->link_flags
;
5366 ap
->ops
= pi
->port_ops
;
5368 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5369 host
->ops
= pi
->port_ops
;
5375 static void ata_host_stop(struct device
*gendev
, void *res
)
5377 struct ata_host
*host
= dev_get_drvdata(gendev
);
5380 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5382 for (i
= 0; i
< host
->n_ports
; i
++) {
5383 struct ata_port
*ap
= host
->ports
[i
];
5385 if (ap
->ops
->port_stop
)
5386 ap
->ops
->port_stop(ap
);
5389 if (host
->ops
->host_stop
)
5390 host
->ops
->host_stop(host
);
5394 * ata_finalize_port_ops - finalize ata_port_operations
5395 * @ops: ata_port_operations to finalize
5397 * An ata_port_operations can inherit from another ops and that
5398 * ops can again inherit from another. This can go on as many
5399 * times as necessary as long as there is no loop in the
5400 * inheritance chain.
5402 * Ops tables are finalized when the host is started. NULL or
5403 * unspecified entries are inherited from the closet ancestor
5404 * which has the method and the entry is populated with it.
5405 * After finalization, the ops table directly points to all the
5406 * methods and ->inherits is no longer necessary and cleared.
5408 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5413 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5415 static spinlock_t lock
= SPIN_LOCK_UNLOCKED
;
5416 const struct ata_port_operations
*cur
;
5417 void **begin
= (void **)ops
;
5418 void **end
= (void **)&ops
->inherits
;
5421 if (!ops
|| !ops
->inherits
)
5426 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5427 void **inherit
= (void **)cur
;
5429 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5434 for (pp
= begin
; pp
< end
; pp
++)
5438 ops
->inherits
= NULL
;
5444 * ata_host_start - start and freeze ports of an ATA host
5445 * @host: ATA host to start ports for
5447 * Start and then freeze ports of @host. Started status is
5448 * recorded in host->flags, so this function can be called
5449 * multiple times. Ports are guaranteed to get started only
5450 * once. If host->ops isn't initialized yet, its set to the
5451 * first non-dummy port ops.
5454 * Inherited from calling layer (may sleep).
5457 * 0 if all ports are started successfully, -errno otherwise.
5459 int ata_host_start(struct ata_host
*host
)
5462 void *start_dr
= NULL
;
5465 if (host
->flags
& ATA_HOST_STARTED
)
5468 ata_finalize_port_ops(host
->ops
);
5470 for (i
= 0; i
< host
->n_ports
; i
++) {
5471 struct ata_port
*ap
= host
->ports
[i
];
5473 ata_finalize_port_ops(ap
->ops
);
5475 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5476 host
->ops
= ap
->ops
;
5478 if (ap
->ops
->port_stop
)
5482 if (host
->ops
->host_stop
)
5486 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5491 for (i
= 0; i
< host
->n_ports
; i
++) {
5492 struct ata_port
*ap
= host
->ports
[i
];
5494 if (ap
->ops
->port_start
) {
5495 rc
= ap
->ops
->port_start(ap
);
5498 dev_printk(KERN_ERR
, host
->dev
,
5499 "failed to start port %d "
5500 "(errno=%d)\n", i
, rc
);
5504 ata_eh_freeze_port(ap
);
5508 devres_add(host
->dev
, start_dr
);
5509 host
->flags
|= ATA_HOST_STARTED
;
5514 struct ata_port
*ap
= host
->ports
[i
];
5516 if (ap
->ops
->port_stop
)
5517 ap
->ops
->port_stop(ap
);
5519 devres_free(start_dr
);
5524 * ata_sas_host_init - Initialize a host struct
5525 * @host: host to initialize
5526 * @dev: device host is attached to
5527 * @flags: host flags
5531 * PCI/etc. bus probe sem.
5534 /* KILLME - the only user left is ipr */
5535 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5536 unsigned long flags
, struct ata_port_operations
*ops
)
5538 spin_lock_init(&host
->lock
);
5540 host
->flags
= flags
;
5545 * ata_host_register - register initialized ATA host
5546 * @host: ATA host to register
5547 * @sht: template for SCSI host
5549 * Register initialized ATA host. @host is allocated using
5550 * ata_host_alloc() and fully initialized by LLD. This function
5551 * starts ports, registers @host with ATA and SCSI layers and
5552 * probe registered devices.
5555 * Inherited from calling layer (may sleep).
5558 * 0 on success, -errno otherwise.
5560 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5564 /* host must have been started */
5565 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5566 dev_printk(KERN_ERR
, host
->dev
,
5567 "BUG: trying to register unstarted host\n");
5572 /* Blow away unused ports. This happens when LLD can't
5573 * determine the exact number of ports to allocate at
5576 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5577 kfree(host
->ports
[i
]);
5579 /* give ports names and add SCSI hosts */
5580 for (i
= 0; i
< host
->n_ports
; i
++)
5581 host
->ports
[i
]->print_id
= ata_print_id
++;
5583 rc
= ata_scsi_add_hosts(host
, sht
);
5587 /* associate with ACPI nodes */
5588 ata_acpi_associate(host
);
5590 /* set cable, sata_spd_limit and report */
5591 for (i
= 0; i
< host
->n_ports
; i
++) {
5592 struct ata_port
*ap
= host
->ports
[i
];
5593 unsigned long xfer_mask
;
5595 /* set SATA cable type if still unset */
5596 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5597 ap
->cbl
= ATA_CBL_SATA
;
5599 /* init sata_spd_limit to the current value */
5600 sata_link_init_spd(&ap
->link
);
5602 /* print per-port info to dmesg */
5603 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5606 if (!ata_port_is_dummy(ap
)) {
5607 ata_port_printk(ap
, KERN_INFO
,
5608 "%cATA max %s %s\n",
5609 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5610 ata_mode_string(xfer_mask
),
5611 ap
->link
.eh_info
.desc
);
5612 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5614 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5617 /* perform each probe synchronously */
5618 DPRINTK("probe begin\n");
5619 for (i
= 0; i
< host
->n_ports
; i
++) {
5620 struct ata_port
*ap
= host
->ports
[i
];
5623 if (ap
->ops
->error_handler
) {
5624 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5625 unsigned long flags
;
5629 /* kick EH for boot probing */
5630 spin_lock_irqsave(ap
->lock
, flags
);
5632 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5633 ehi
->action
|= ATA_EH_RESET
;
5634 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5636 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5637 ap
->pflags
|= ATA_PFLAG_LOADING
;
5638 ata_port_schedule_eh(ap
);
5640 spin_unlock_irqrestore(ap
->lock
, flags
);
5642 /* wait for EH to finish */
5643 ata_port_wait_eh(ap
);
5645 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5646 rc
= ata_bus_probe(ap
);
5647 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5650 /* FIXME: do something useful here?
5651 * Current libata behavior will
5652 * tear down everything when
5653 * the module is removed
5654 * or the h/w is unplugged.
5660 /* probes are done, now scan each port's disk(s) */
5661 DPRINTK("host probe begin\n");
5662 for (i
= 0; i
< host
->n_ports
; i
++) {
5663 struct ata_port
*ap
= host
->ports
[i
];
5665 ata_scsi_scan_host(ap
, 1);
5666 ata_lpm_schedule(ap
, ap
->pm_policy
);
5673 * ata_host_activate - start host, request IRQ and register it
5674 * @host: target ATA host
5675 * @irq: IRQ to request
5676 * @irq_handler: irq_handler used when requesting IRQ
5677 * @irq_flags: irq_flags used when requesting IRQ
5678 * @sht: scsi_host_template to use when registering the host
5680 * After allocating an ATA host and initializing it, most libata
5681 * LLDs perform three steps to activate the host - start host,
5682 * request IRQ and register it. This helper takes necessasry
5683 * arguments and performs the three steps in one go.
5685 * An invalid IRQ skips the IRQ registration and expects the host to
5686 * have set polling mode on the port. In this case, @irq_handler
5690 * Inherited from calling layer (may sleep).
5693 * 0 on success, -errno otherwise.
5695 int ata_host_activate(struct ata_host
*host
, int irq
,
5696 irq_handler_t irq_handler
, unsigned long irq_flags
,
5697 struct scsi_host_template
*sht
)
5701 rc
= ata_host_start(host
);
5705 /* Special case for polling mode */
5707 WARN_ON(irq_handler
);
5708 return ata_host_register(host
, sht
);
5711 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5712 dev_driver_string(host
->dev
), host
);
5716 for (i
= 0; i
< host
->n_ports
; i
++)
5717 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5719 rc
= ata_host_register(host
, sht
);
5720 /* if failed, just free the IRQ and leave ports alone */
5722 devm_free_irq(host
->dev
, irq
, host
);
5728 * ata_port_detach - Detach ATA port in prepration of device removal
5729 * @ap: ATA port to be detached
5731 * Detach all ATA devices and the associated SCSI devices of @ap;
5732 * then, remove the associated SCSI host. @ap is guaranteed to
5733 * be quiescent on return from this function.
5736 * Kernel thread context (may sleep).
5738 static void ata_port_detach(struct ata_port
*ap
)
5740 unsigned long flags
;
5741 struct ata_link
*link
;
5742 struct ata_device
*dev
;
5744 if (!ap
->ops
->error_handler
)
5747 /* tell EH we're leaving & flush EH */
5748 spin_lock_irqsave(ap
->lock
, flags
);
5749 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5750 spin_unlock_irqrestore(ap
->lock
, flags
);
5752 ata_port_wait_eh(ap
);
5754 /* EH is now guaranteed to see UNLOADING - EH context belongs
5755 * to us. Disable all existing devices.
5757 ata_port_for_each_link(link
, ap
) {
5758 ata_link_for_each_dev(dev
, link
)
5759 ata_dev_disable(dev
);
5762 /* Final freeze & EH. All in-flight commands are aborted. EH
5763 * will be skipped and retrials will be terminated with bad
5766 spin_lock_irqsave(ap
->lock
, flags
);
5767 ata_port_freeze(ap
); /* won't be thawed */
5768 spin_unlock_irqrestore(ap
->lock
, flags
);
5770 ata_port_wait_eh(ap
);
5771 cancel_rearming_delayed_work(&ap
->hotplug_task
);
5774 /* remove the associated SCSI host */
5775 scsi_remove_host(ap
->scsi_host
);
5779 * ata_host_detach - Detach all ports of an ATA host
5780 * @host: Host to detach
5782 * Detach all ports of @host.
5785 * Kernel thread context (may sleep).
5787 void ata_host_detach(struct ata_host
*host
)
5791 for (i
= 0; i
< host
->n_ports
; i
++)
5792 ata_port_detach(host
->ports
[i
]);
5794 /* the host is dead now, dissociate ACPI */
5795 ata_acpi_dissociate(host
);
5801 * ata_pci_remove_one - PCI layer callback for device removal
5802 * @pdev: PCI device that was removed
5804 * PCI layer indicates to libata via this hook that hot-unplug or
5805 * module unload event has occurred. Detach all ports. Resource
5806 * release is handled via devres.
5809 * Inherited from PCI layer (may sleep).
5811 void ata_pci_remove_one(struct pci_dev
*pdev
)
5813 struct device
*dev
= &pdev
->dev
;
5814 struct ata_host
*host
= dev_get_drvdata(dev
);
5816 ata_host_detach(host
);
5819 /* move to PCI subsystem */
5820 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5822 unsigned long tmp
= 0;
5824 switch (bits
->width
) {
5827 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5833 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5839 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5850 return (tmp
== bits
->val
) ? 1 : 0;
5854 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5856 pci_save_state(pdev
);
5857 pci_disable_device(pdev
);
5859 if (mesg
.event
& PM_EVENT_SLEEP
)
5860 pci_set_power_state(pdev
, PCI_D3hot
);
5863 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
5867 pci_set_power_state(pdev
, PCI_D0
);
5868 pci_restore_state(pdev
);
5870 rc
= pcim_enable_device(pdev
);
5872 dev_printk(KERN_ERR
, &pdev
->dev
,
5873 "failed to enable device after resume (%d)\n", rc
);
5877 pci_set_master(pdev
);
5881 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5883 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
5886 rc
= ata_host_suspend(host
, mesg
);
5890 ata_pci_device_do_suspend(pdev
, mesg
);
5895 int ata_pci_device_resume(struct pci_dev
*pdev
)
5897 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
5900 rc
= ata_pci_device_do_resume(pdev
);
5902 ata_host_resume(host
);
5905 #endif /* CONFIG_PM */
5907 #endif /* CONFIG_PCI */
5909 static int __init
ata_parse_force_one(char **cur
,
5910 struct ata_force_ent
*force_ent
,
5911 const char **reason
)
5913 /* FIXME: Currently, there's no way to tag init const data and
5914 * using __initdata causes build failure on some versions of
5915 * gcc. Once __initdataconst is implemented, add const to the
5916 * following structure.
5918 static struct ata_force_param force_tbl
[] __initdata
= {
5919 { "40c", .cbl
= ATA_CBL_PATA40
},
5920 { "80c", .cbl
= ATA_CBL_PATA80
},
5921 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
5922 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
5923 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
5924 { "sata", .cbl
= ATA_CBL_SATA
},
5925 { "1.5Gbps", .spd_limit
= 1 },
5926 { "3.0Gbps", .spd_limit
= 2 },
5927 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
5928 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
5929 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
5930 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
5931 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
5932 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
5933 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
5934 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
5935 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
5936 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
5937 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
5938 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
5939 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
5940 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
5941 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5942 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5943 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
5944 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5945 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5946 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
5947 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5948 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5949 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
5950 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5951 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5952 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
5953 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5954 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5955 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
5956 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5957 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5958 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
5959 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5960 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5961 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
5962 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
5964 char *start
= *cur
, *p
= *cur
;
5965 char *id
, *val
, *endp
;
5966 const struct ata_force_param
*match_fp
= NULL
;
5967 int nr_matches
= 0, i
;
5969 /* find where this param ends and update *cur */
5970 while (*p
!= '\0' && *p
!= ',')
5981 p
= strchr(start
, ':');
5983 val
= strstrip(start
);
5988 id
= strstrip(start
);
5989 val
= strstrip(p
+ 1);
5992 p
= strchr(id
, '.');
5995 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
5996 if (p
== endp
|| *endp
!= '\0') {
5997 *reason
= "invalid device";
6002 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6003 if (p
== endp
|| *endp
!= '\0') {
6004 *reason
= "invalid port/link";
6009 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6010 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6011 const struct ata_force_param
*fp
= &force_tbl
[i
];
6013 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6019 if (strcasecmp(val
, fp
->name
) == 0) {
6026 *reason
= "unknown value";
6029 if (nr_matches
> 1) {
6030 *reason
= "ambigious value";
6034 force_ent
->param
= *match_fp
;
6039 static void __init
ata_parse_force_param(void)
6041 int idx
= 0, size
= 1;
6042 int last_port
= -1, last_device
= -1;
6043 char *p
, *cur
, *next
;
6045 /* calculate maximum number of params and allocate force_tbl */
6046 for (p
= ata_force_param_buf
; *p
; p
++)
6050 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6051 if (!ata_force_tbl
) {
6052 printk(KERN_WARNING
"ata: failed to extend force table, "
6053 "libata.force ignored\n");
6057 /* parse and populate the table */
6058 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6059 const char *reason
= "";
6060 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6063 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6064 printk(KERN_WARNING
"ata: failed to parse force "
6065 "parameter \"%s\" (%s)\n",
6070 if (te
.port
== -1) {
6071 te
.port
= last_port
;
6072 te
.device
= last_device
;
6075 ata_force_tbl
[idx
++] = te
;
6077 last_port
= te
.port
;
6078 last_device
= te
.device
;
6081 ata_force_tbl_size
= idx
;
6084 static int __init
ata_init(void)
6086 ata_probe_timeout
*= HZ
;
6088 ata_parse_force_param();
6090 ata_wq
= create_workqueue("ata");
6094 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6096 destroy_workqueue(ata_wq
);
6100 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6104 static void __exit
ata_exit(void)
6106 kfree(ata_force_tbl
);
6107 destroy_workqueue(ata_wq
);
6108 destroy_workqueue(ata_aux_wq
);
6111 subsys_initcall(ata_init
);
6112 module_exit(ata_exit
);
6114 static unsigned long ratelimit_time
;
6115 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6117 int ata_ratelimit(void)
6120 unsigned long flags
;
6122 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6124 if (time_after(jiffies
, ratelimit_time
)) {
6126 ratelimit_time
= jiffies
+ (HZ
/5);
6130 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6136 * ata_wait_register - wait until register value changes
6137 * @reg: IO-mapped register
6138 * @mask: Mask to apply to read register value
6139 * @val: Wait condition
6140 * @interval_msec: polling interval in milliseconds
6141 * @timeout_msec: timeout in milliseconds
6143 * Waiting for some bits of register to change is a common
6144 * operation for ATA controllers. This function reads 32bit LE
6145 * IO-mapped register @reg and tests for the following condition.
6147 * (*@reg & mask) != val
6149 * If the condition is met, it returns; otherwise, the process is
6150 * repeated after @interval_msec until timeout.
6153 * Kernel thread context (may sleep)
6156 * The final register value.
6158 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6159 unsigned long interval_msec
,
6160 unsigned long timeout_msec
)
6162 unsigned long timeout
;
6165 tmp
= ioread32(reg
);
6167 /* Calculate timeout _after_ the first read to make sure
6168 * preceding writes reach the controller before starting to
6169 * eat away the timeout.
6171 timeout
= jiffies
+ (timeout_msec
* HZ
) / 1000;
6173 while ((tmp
& mask
) == val
&& time_before(jiffies
, timeout
)) {
6174 msleep(interval_msec
);
6175 tmp
= ioread32(reg
);
6184 static void ata_dummy_noret(struct ata_port
*ap
) { }
6185 static int ata_dummy_ret0(struct ata_port
*ap
) { return 0; }
6186 static void ata_dummy_qc_noret(struct ata_queued_cmd
*qc
) { }
6188 static u8
ata_dummy_check_status(struct ata_port
*ap
)
6193 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6195 return AC_ERR_SYSTEM
;
6198 struct ata_port_operations ata_dummy_port_ops
= {
6199 .sff_check_status
= ata_dummy_check_status
,
6200 .sff_check_altstatus
= ata_dummy_check_status
,
6201 .sff_dev_select
= ata_noop_dev_select
,
6202 .qc_prep
= ata_noop_qc_prep
,
6203 .qc_issue
= ata_dummy_qc_issue
,
6204 .freeze
= ata_dummy_noret
,
6205 .thaw
= ata_dummy_noret
,
6206 .error_handler
= ata_dummy_noret
,
6207 .post_internal_cmd
= ata_dummy_qc_noret
,
6208 .sff_irq_clear
= ata_dummy_noret
,
6209 .port_start
= ata_dummy_ret0
,
6210 .port_stop
= ata_dummy_noret
,
6213 const struct ata_port_info ata_dummy_port_info
= {
6214 .port_ops
= &ata_dummy_port_ops
,
6218 * libata is essentially a library of internal helper functions for
6219 * low-level ATA host controller drivers. As such, the API/ABI is
6220 * likely to change as new drivers are added and updated.
6221 * Do not depend on ABI/API stability.
6223 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6224 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6225 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6226 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6227 EXPORT_SYMBOL_GPL(sata_port_ops
);
6228 EXPORT_SYMBOL_GPL(sata_pmp_port_ops
);
6229 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6230 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6231 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6232 EXPORT_SYMBOL_GPL(ata_host_init
);
6233 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6234 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6235 EXPORT_SYMBOL_GPL(ata_host_start
);
6236 EXPORT_SYMBOL_GPL(ata_host_register
);
6237 EXPORT_SYMBOL_GPL(ata_host_activate
);
6238 EXPORT_SYMBOL_GPL(ata_host_detach
);
6239 EXPORT_SYMBOL_GPL(ata_sg_init
);
6240 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6241 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6242 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
6243 EXPORT_SYMBOL_GPL(sata_print_link_status
);
6244 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6245 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6246 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6247 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6248 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6249 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6250 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6251 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6252 EXPORT_SYMBOL_GPL(ata_mode_string
);
6253 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6254 EXPORT_SYMBOL_GPL(ata_port_start
);
6255 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6256 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6257 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6258 EXPORT_SYMBOL_GPL(ata_port_probe
);
6259 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6260 EXPORT_SYMBOL_GPL(sata_set_spd
);
6261 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6262 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6263 EXPORT_SYMBOL_GPL(sata_link_resume
);
6264 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6265 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6266 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6267 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6268 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6269 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6270 EXPORT_SYMBOL_GPL(ata_port_disable
);
6271 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6272 EXPORT_SYMBOL_GPL(ata_wait_register
);
6273 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6274 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6275 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6276 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6277 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6278 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6279 EXPORT_SYMBOL_GPL(sata_scr_read
);
6280 EXPORT_SYMBOL_GPL(sata_scr_write
);
6281 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6282 EXPORT_SYMBOL_GPL(ata_link_online
);
6283 EXPORT_SYMBOL_GPL(ata_link_offline
);
6285 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6286 EXPORT_SYMBOL_GPL(ata_host_resume
);
6287 #endif /* CONFIG_PM */
6288 EXPORT_SYMBOL_GPL(ata_id_string
);
6289 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6290 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6292 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6293 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6294 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6295 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6296 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6299 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6300 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6302 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6303 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6304 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6305 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6306 #endif /* CONFIG_PM */
6307 #endif /* CONFIG_PCI */
6309 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch
);
6310 EXPORT_SYMBOL_GPL(sata_pmp_error_handler
);
6312 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6313 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6314 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6315 EXPORT_SYMBOL_GPL(ata_port_desc
);
6317 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6318 #endif /* CONFIG_PCI */
6319 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6320 EXPORT_SYMBOL_GPL(ata_link_abort
);
6321 EXPORT_SYMBOL_GPL(ata_port_abort
);
6322 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6323 EXPORT_SYMBOL_GPL(sata_async_notification
);
6324 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6325 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6326 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6327 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6328 EXPORT_SYMBOL_GPL(ata_do_eh
);
6329 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6331 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6332 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6333 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6334 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6335 EXPORT_SYMBOL_GPL(ata_cable_sata
);