2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <scsi/scsi.h>
60 #include <scsi/scsi_cmnd.h>
61 #include <scsi/scsi_host.h>
62 #include <linux/libata.h>
63 #include <asm/byteorder.h>
64 #include <linux/cdrom.h>
69 /* debounce timing parameters in msecs { interval, duration, timeout } */
70 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
71 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
72 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
74 const struct ata_port_operations ata_base_port_ops
= {
75 .prereset
= ata_std_prereset
,
76 .postreset
= ata_std_postreset
,
77 .error_handler
= ata_std_error_handler
,
80 const struct ata_port_operations sata_port_ops
= {
81 .inherits
= &ata_base_port_ops
,
83 .qc_defer
= ata_std_qc_defer
,
84 .hardreset
= sata_std_hardreset
,
87 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
88 u16 heads
, u16 sectors
);
89 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
90 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
91 u8 enable
, u8 feature
);
92 static void ata_dev_xfermask(struct ata_device
*dev
);
93 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
95 unsigned int ata_print_id
= 1;
96 static struct workqueue_struct
*ata_wq
;
98 struct workqueue_struct
*ata_aux_wq
;
100 struct ata_force_param
{
104 unsigned long xfer_mask
;
105 unsigned int horkage_on
;
106 unsigned int horkage_off
;
110 struct ata_force_ent
{
113 struct ata_force_param param
;
116 static struct ata_force_ent
*ata_force_tbl
;
117 static int ata_force_tbl_size
;
119 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
120 /* param_buf is thrown away after initialization, disallow read */
121 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
122 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
124 static int atapi_enabled
= 1;
125 module_param(atapi_enabled
, int, 0444);
126 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
128 static int atapi_dmadir
= 0;
129 module_param(atapi_dmadir
, int, 0444);
130 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
132 int atapi_passthru16
= 1;
133 module_param(atapi_passthru16
, int, 0444);
134 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
137 module_param_named(fua
, libata_fua
, int, 0444);
138 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
140 static int ata_ignore_hpa
;
141 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
142 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
144 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
145 module_param_named(dma
, libata_dma_mask
, int, 0444);
146 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
148 static int ata_probe_timeout
;
149 module_param(ata_probe_timeout
, int, 0444);
150 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
152 int libata_noacpi
= 0;
153 module_param_named(noacpi
, libata_noacpi
, int, 0444);
154 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
156 int libata_allow_tpm
= 0;
157 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
158 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
160 MODULE_AUTHOR("Jeff Garzik");
161 MODULE_DESCRIPTION("Library module for ATA devices");
162 MODULE_LICENSE("GPL");
163 MODULE_VERSION(DRV_VERSION
);
167 * ata_force_cbl - force cable type according to libata.force
168 * @ap: ATA port of interest
170 * Force cable type according to libata.force and whine about it.
171 * The last entry which has matching port number is used, so it
172 * can be specified as part of device force parameters. For
173 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
179 void ata_force_cbl(struct ata_port
*ap
)
183 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
184 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
186 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
189 if (fe
->param
.cbl
== ATA_CBL_NONE
)
192 ap
->cbl
= fe
->param
.cbl
;
193 ata_port_printk(ap
, KERN_NOTICE
,
194 "FORCE: cable set to %s\n", fe
->param
.name
);
200 * ata_force_link_limits - force link limits according to libata.force
201 * @link: ATA link of interest
203 * Force link flags and SATA spd limit according to libata.force
204 * and whine about it. When only the port part is specified
205 * (e.g. 1:), the limit applies to all links connected to both
206 * the host link and all fan-out ports connected via PMP. If the
207 * device part is specified as 0 (e.g. 1.00:), it specifies the
208 * first fan-out link not the host link. Device number 15 always
209 * points to the host link whether PMP is attached or not.
214 static void ata_force_link_limits(struct ata_link
*link
)
216 bool did_spd
= false;
219 if (ata_is_host_link(link
))
224 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
225 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
227 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
230 if (fe
->device
!= -1 && fe
->device
!= linkno
)
233 /* only honor the first spd limit */
234 if (!did_spd
&& fe
->param
.spd_limit
) {
235 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
236 ata_link_printk(link
, KERN_NOTICE
,
237 "FORCE: PHY spd limit set to %s\n",
242 /* let lflags stack */
243 if (fe
->param
.lflags
) {
244 link
->flags
|= fe
->param
.lflags
;
245 ata_link_printk(link
, KERN_NOTICE
,
246 "FORCE: link flag 0x%x forced -> 0x%x\n",
247 fe
->param
.lflags
, link
->flags
);
253 * ata_force_xfermask - force xfermask according to libata.force
254 * @dev: ATA device of interest
256 * Force xfer_mask according to libata.force and whine about it.
257 * For consistency with link selection, device number 15 selects
258 * the first device connected to the host link.
263 static void ata_force_xfermask(struct ata_device
*dev
)
265 int devno
= dev
->link
->pmp
+ dev
->devno
;
266 int alt_devno
= devno
;
269 /* allow n.15 for the first device attached to host port */
270 if (ata_is_host_link(dev
->link
) && devno
== 0)
273 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
274 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
275 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
277 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
280 if (fe
->device
!= -1 && fe
->device
!= devno
&&
281 fe
->device
!= alt_devno
)
284 if (!fe
->param
.xfer_mask
)
287 ata_unpack_xfermask(fe
->param
.xfer_mask
,
288 &pio_mask
, &mwdma_mask
, &udma_mask
);
290 dev
->udma_mask
= udma_mask
;
291 else if (mwdma_mask
) {
293 dev
->mwdma_mask
= mwdma_mask
;
297 dev
->pio_mask
= pio_mask
;
300 ata_dev_printk(dev
, KERN_NOTICE
,
301 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
307 * ata_force_horkage - force horkage according to libata.force
308 * @dev: ATA device of interest
310 * Force horkage according to libata.force and whine about it.
311 * For consistency with link selection, device number 15 selects
312 * the first device connected to the host link.
317 static void ata_force_horkage(struct ata_device
*dev
)
319 int devno
= dev
->link
->pmp
+ dev
->devno
;
320 int alt_devno
= devno
;
323 /* allow n.15 for the first device attached to host port */
324 if (ata_is_host_link(dev
->link
) && devno
== 0)
327 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
328 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
330 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
333 if (fe
->device
!= -1 && fe
->device
!= devno
&&
334 fe
->device
!= alt_devno
)
337 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
338 !(dev
->horkage
& fe
->param
.horkage_off
))
341 dev
->horkage
|= fe
->param
.horkage_on
;
342 dev
->horkage
&= ~fe
->param
.horkage_off
;
344 ata_dev_printk(dev
, KERN_NOTICE
,
345 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
350 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
351 * @opcode: SCSI opcode
353 * Determine ATAPI command type from @opcode.
359 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
361 int atapi_cmd_type(u8 opcode
)
370 case GPCMD_WRITE_AND_VERIFY_10
:
374 case GPCMD_READ_CD_MSF
:
375 return ATAPI_READ_CD
;
379 if (atapi_passthru16
)
380 return ATAPI_PASS_THRU
;
388 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
389 * @tf: Taskfile to convert
390 * @pmp: Port multiplier port
391 * @is_cmd: This FIS is for command
392 * @fis: Buffer into which data will output
394 * Converts a standard ATA taskfile to a Serial ATA
395 * FIS structure (Register - Host to Device).
398 * Inherited from caller.
400 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
402 fis
[0] = 0x27; /* Register - Host to Device FIS */
403 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
405 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
407 fis
[2] = tf
->command
;
408 fis
[3] = tf
->feature
;
415 fis
[8] = tf
->hob_lbal
;
416 fis
[9] = tf
->hob_lbam
;
417 fis
[10] = tf
->hob_lbah
;
418 fis
[11] = tf
->hob_feature
;
421 fis
[13] = tf
->hob_nsect
;
432 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
433 * @fis: Buffer from which data will be input
434 * @tf: Taskfile to output
436 * Converts a serial ATA FIS structure to a standard ATA taskfile.
439 * Inherited from caller.
442 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
444 tf
->command
= fis
[2]; /* status */
445 tf
->feature
= fis
[3]; /* error */
452 tf
->hob_lbal
= fis
[8];
453 tf
->hob_lbam
= fis
[9];
454 tf
->hob_lbah
= fis
[10];
457 tf
->hob_nsect
= fis
[13];
460 static const u8 ata_rw_cmds
[] = {
464 ATA_CMD_READ_MULTI_EXT
,
465 ATA_CMD_WRITE_MULTI_EXT
,
469 ATA_CMD_WRITE_MULTI_FUA_EXT
,
473 ATA_CMD_PIO_READ_EXT
,
474 ATA_CMD_PIO_WRITE_EXT
,
487 ATA_CMD_WRITE_FUA_EXT
491 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
492 * @tf: command to examine and configure
493 * @dev: device tf belongs to
495 * Examine the device configuration and tf->flags to calculate
496 * the proper read/write commands and protocol to use.
501 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
505 int index
, fua
, lba48
, write
;
507 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
508 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
509 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
511 if (dev
->flags
& ATA_DFLAG_PIO
) {
512 tf
->protocol
= ATA_PROT_PIO
;
513 index
= dev
->multi_count
? 0 : 8;
514 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
515 /* Unable to use DMA due to host limitation */
516 tf
->protocol
= ATA_PROT_PIO
;
517 index
= dev
->multi_count
? 0 : 8;
519 tf
->protocol
= ATA_PROT_DMA
;
523 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
532 * ata_tf_read_block - Read block address from ATA taskfile
533 * @tf: ATA taskfile of interest
534 * @dev: ATA device @tf belongs to
539 * Read block address from @tf. This function can handle all
540 * three address formats - LBA, LBA48 and CHS. tf->protocol and
541 * flags select the address format to use.
544 * Block address read from @tf.
546 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
550 if (tf
->flags
& ATA_TFLAG_LBA
) {
551 if (tf
->flags
& ATA_TFLAG_LBA48
) {
552 block
|= (u64
)tf
->hob_lbah
<< 40;
553 block
|= (u64
)tf
->hob_lbam
<< 32;
554 block
|= (u64
)tf
->hob_lbal
<< 24;
556 block
|= (tf
->device
& 0xf) << 24;
558 block
|= tf
->lbah
<< 16;
559 block
|= tf
->lbam
<< 8;
564 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
565 head
= tf
->device
& 0xf;
568 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
575 * ata_build_rw_tf - Build ATA taskfile for given read/write request
576 * @tf: Target ATA taskfile
577 * @dev: ATA device @tf belongs to
578 * @block: Block address
579 * @n_block: Number of blocks
580 * @tf_flags: RW/FUA etc...
586 * Build ATA taskfile @tf for read/write request described by
587 * @block, @n_block, @tf_flags and @tag on @dev.
591 * 0 on success, -ERANGE if the request is too large for @dev,
592 * -EINVAL if the request is invalid.
594 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
595 u64 block
, u32 n_block
, unsigned int tf_flags
,
598 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
599 tf
->flags
|= tf_flags
;
601 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
603 if (!lba_48_ok(block
, n_block
))
606 tf
->protocol
= ATA_PROT_NCQ
;
607 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
609 if (tf
->flags
& ATA_TFLAG_WRITE
)
610 tf
->command
= ATA_CMD_FPDMA_WRITE
;
612 tf
->command
= ATA_CMD_FPDMA_READ
;
614 tf
->nsect
= tag
<< 3;
615 tf
->hob_feature
= (n_block
>> 8) & 0xff;
616 tf
->feature
= n_block
& 0xff;
618 tf
->hob_lbah
= (block
>> 40) & 0xff;
619 tf
->hob_lbam
= (block
>> 32) & 0xff;
620 tf
->hob_lbal
= (block
>> 24) & 0xff;
621 tf
->lbah
= (block
>> 16) & 0xff;
622 tf
->lbam
= (block
>> 8) & 0xff;
623 tf
->lbal
= block
& 0xff;
626 if (tf
->flags
& ATA_TFLAG_FUA
)
627 tf
->device
|= 1 << 7;
628 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
629 tf
->flags
|= ATA_TFLAG_LBA
;
631 if (lba_28_ok(block
, n_block
)) {
633 tf
->device
|= (block
>> 24) & 0xf;
634 } else if (lba_48_ok(block
, n_block
)) {
635 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
639 tf
->flags
|= ATA_TFLAG_LBA48
;
641 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
643 tf
->hob_lbah
= (block
>> 40) & 0xff;
644 tf
->hob_lbam
= (block
>> 32) & 0xff;
645 tf
->hob_lbal
= (block
>> 24) & 0xff;
647 /* request too large even for LBA48 */
650 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
653 tf
->nsect
= n_block
& 0xff;
655 tf
->lbah
= (block
>> 16) & 0xff;
656 tf
->lbam
= (block
>> 8) & 0xff;
657 tf
->lbal
= block
& 0xff;
659 tf
->device
|= ATA_LBA
;
662 u32 sect
, head
, cyl
, track
;
664 /* The request -may- be too large for CHS addressing. */
665 if (!lba_28_ok(block
, n_block
))
668 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
671 /* Convert LBA to CHS */
672 track
= (u32
)block
/ dev
->sectors
;
673 cyl
= track
/ dev
->heads
;
674 head
= track
% dev
->heads
;
675 sect
= (u32
)block
% dev
->sectors
+ 1;
677 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
678 (u32
)block
, track
, cyl
, head
, sect
);
680 /* Check whether the converted CHS can fit.
684 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
687 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
698 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
699 * @pio_mask: pio_mask
700 * @mwdma_mask: mwdma_mask
701 * @udma_mask: udma_mask
703 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
704 * unsigned int xfer_mask.
712 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
713 unsigned long mwdma_mask
,
714 unsigned long udma_mask
)
716 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
717 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
718 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
722 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
723 * @xfer_mask: xfer_mask to unpack
724 * @pio_mask: resulting pio_mask
725 * @mwdma_mask: resulting mwdma_mask
726 * @udma_mask: resulting udma_mask
728 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
729 * Any NULL distination masks will be ignored.
731 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
732 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
735 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
737 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
739 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
742 static const struct ata_xfer_ent
{
746 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
747 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
748 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
753 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
754 * @xfer_mask: xfer_mask of interest
756 * Return matching XFER_* value for @xfer_mask. Only the highest
757 * bit of @xfer_mask is considered.
763 * Matching XFER_* value, 0xff if no match found.
765 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
767 int highbit
= fls(xfer_mask
) - 1;
768 const struct ata_xfer_ent
*ent
;
770 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
771 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
772 return ent
->base
+ highbit
- ent
->shift
;
777 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
778 * @xfer_mode: XFER_* of interest
780 * Return matching xfer_mask for @xfer_mode.
786 * Matching xfer_mask, 0 if no match found.
788 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
790 const struct ata_xfer_ent
*ent
;
792 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
793 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
794 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
795 & ~((1 << ent
->shift
) - 1);
800 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
801 * @xfer_mode: XFER_* of interest
803 * Return matching xfer_shift for @xfer_mode.
809 * Matching xfer_shift, -1 if no match found.
811 int ata_xfer_mode2shift(unsigned long xfer_mode
)
813 const struct ata_xfer_ent
*ent
;
815 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
816 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
822 * ata_mode_string - convert xfer_mask to string
823 * @xfer_mask: mask of bits supported; only highest bit counts.
825 * Determine string which represents the highest speed
826 * (highest bit in @modemask).
832 * Constant C string representing highest speed listed in
833 * @mode_mask, or the constant C string "<n/a>".
835 const char *ata_mode_string(unsigned long xfer_mask
)
837 static const char * const xfer_mode_str
[] = {
861 highbit
= fls(xfer_mask
) - 1;
862 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
863 return xfer_mode_str
[highbit
];
867 static const char *sata_spd_string(unsigned int spd
)
869 static const char * const spd_str
[] = {
874 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
876 return spd_str
[spd
- 1];
879 void ata_dev_disable(struct ata_device
*dev
)
881 if (ata_dev_enabled(dev
)) {
882 if (ata_msg_drv(dev
->link
->ap
))
883 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
884 ata_acpi_on_disable(dev
);
885 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
891 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
893 struct ata_link
*link
= dev
->link
;
894 struct ata_port
*ap
= link
->ap
;
896 unsigned int err_mask
;
900 * disallow DIPM for drivers which haven't set
901 * ATA_FLAG_IPM. This is because when DIPM is enabled,
902 * phy ready will be set in the interrupt status on
903 * state changes, which will cause some drivers to
904 * think there are errors - additionally drivers will
905 * need to disable hot plug.
907 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
908 ap
->pm_policy
= NOT_AVAILABLE
;
913 * For DIPM, we will only enable it for the
916 * Why? Because Disks are too stupid to know that
917 * If the host rejects a request to go to SLUMBER
918 * they should retry at PARTIAL, and instead it
919 * just would give up. So, for medium_power to
920 * work at all, we need to only allow HIPM.
922 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
928 /* no restrictions on IPM transitions */
929 scontrol
&= ~(0x3 << 8);
930 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
935 if (dev
->flags
& ATA_DFLAG_DIPM
)
936 err_mask
= ata_dev_set_feature(dev
,
937 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
940 /* allow IPM to PARTIAL */
941 scontrol
&= ~(0x1 << 8);
942 scontrol
|= (0x2 << 8);
943 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
948 * we don't have to disable DIPM since IPM flags
949 * disallow transitions to SLUMBER, which effectively
950 * disable DIPM if it does not support PARTIAL
954 case MAX_PERFORMANCE
:
955 /* disable all IPM transitions */
956 scontrol
|= (0x3 << 8);
957 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
962 * we don't have to disable DIPM since IPM flags
963 * disallow all transitions which effectively
964 * disable DIPM anyway.
969 /* FIXME: handle SET FEATURES failure */
976 * ata_dev_enable_pm - enable SATA interface power management
977 * @dev: device to enable power management
978 * @policy: the link power management policy
980 * Enable SATA Interface power management. This will enable
981 * Device Interface Power Management (DIPM) for min_power
982 * policy, and then call driver specific callbacks for
983 * enabling Host Initiated Power management.
986 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
988 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
991 struct ata_port
*ap
= dev
->link
->ap
;
993 /* set HIPM first, then DIPM */
994 if (ap
->ops
->enable_pm
)
995 rc
= ap
->ops
->enable_pm(ap
, policy
);
998 rc
= ata_dev_set_dipm(dev
, policy
);
1002 ap
->pm_policy
= MAX_PERFORMANCE
;
1004 ap
->pm_policy
= policy
;
1005 return /* rc */; /* hopefully we can use 'rc' eventually */
1010 * ata_dev_disable_pm - disable SATA interface power management
1011 * @dev: device to disable power management
1013 * Disable SATA Interface power management. This will disable
1014 * Device Interface Power Management (DIPM) without changing
1015 * policy, call driver specific callbacks for disabling Host
1016 * Initiated Power management.
1021 static void ata_dev_disable_pm(struct ata_device
*dev
)
1023 struct ata_port
*ap
= dev
->link
->ap
;
1025 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1026 if (ap
->ops
->disable_pm
)
1027 ap
->ops
->disable_pm(ap
);
1029 #endif /* CONFIG_PM */
1031 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1033 ap
->pm_policy
= policy
;
1034 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1035 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1036 ata_port_schedule_eh(ap
);
1040 static void ata_lpm_enable(struct ata_host
*host
)
1042 struct ata_link
*link
;
1043 struct ata_port
*ap
;
1044 struct ata_device
*dev
;
1047 for (i
= 0; i
< host
->n_ports
; i
++) {
1048 ap
= host
->ports
[i
];
1049 ata_port_for_each_link(link
, ap
) {
1050 ata_link_for_each_dev(dev
, link
)
1051 ata_dev_disable_pm(dev
);
1056 static void ata_lpm_disable(struct ata_host
*host
)
1060 for (i
= 0; i
< host
->n_ports
; i
++) {
1061 struct ata_port
*ap
= host
->ports
[i
];
1062 ata_lpm_schedule(ap
, ap
->pm_policy
);
1065 #endif /* CONFIG_PM */
1068 * ata_dev_classify - determine device type based on ATA-spec signature
1069 * @tf: ATA taskfile register set for device to be identified
1071 * Determine from taskfile register contents whether a device is
1072 * ATA or ATAPI, as per "Signature and persistence" section
1073 * of ATA/PI spec (volume 1, sect 5.14).
1079 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1080 * %ATA_DEV_UNKNOWN the event of failure.
1082 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1084 /* Apple's open source Darwin code hints that some devices only
1085 * put a proper signature into the LBA mid/high registers,
1086 * So, we only check those. It's sufficient for uniqueness.
1088 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1089 * signatures for ATA and ATAPI devices attached on SerialATA,
1090 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1091 * spec has never mentioned about using different signatures
1092 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1093 * Multiplier specification began to use 0x69/0x96 to identify
1094 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1095 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1096 * 0x69/0x96 shortly and described them as reserved for
1099 * We follow the current spec and consider that 0x69/0x96
1100 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1102 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1103 DPRINTK("found ATA device by sig\n");
1107 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1108 DPRINTK("found ATAPI device by sig\n");
1109 return ATA_DEV_ATAPI
;
1112 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1113 DPRINTK("found PMP device by sig\n");
1117 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1118 printk(KERN_INFO
"ata: SEMB device ignored\n");
1119 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1122 DPRINTK("unknown device\n");
1123 return ATA_DEV_UNKNOWN
;
1127 * ata_id_string - Convert IDENTIFY DEVICE page into string
1128 * @id: IDENTIFY DEVICE results we will examine
1129 * @s: string into which data is output
1130 * @ofs: offset into identify device page
1131 * @len: length of string to return. must be an even number.
1133 * The strings in the IDENTIFY DEVICE page are broken up into
1134 * 16-bit chunks. Run through the string, and output each
1135 * 8-bit chunk linearly, regardless of platform.
1141 void ata_id_string(const u16
*id
, unsigned char *s
,
1142 unsigned int ofs
, unsigned int len
)
1163 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1164 * @id: IDENTIFY DEVICE results we will examine
1165 * @s: string into which data is output
1166 * @ofs: offset into identify device page
1167 * @len: length of string to return. must be an odd number.
1169 * This function is identical to ata_id_string except that it
1170 * trims trailing spaces and terminates the resulting string with
1171 * null. @len must be actual maximum length (even number) + 1.
1176 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1177 unsigned int ofs
, unsigned int len
)
1181 ata_id_string(id
, s
, ofs
, len
- 1);
1183 p
= s
+ strnlen(s
, len
- 1);
1184 while (p
> s
&& p
[-1] == ' ')
1189 static u64
ata_id_n_sectors(const u16
*id
)
1191 if (ata_id_has_lba(id
)) {
1192 if (ata_id_has_lba48(id
))
1193 return ata_id_u64(id
, 100);
1195 return ata_id_u32(id
, 60);
1197 if (ata_id_current_chs_valid(id
))
1198 return ata_id_u32(id
, 57);
1200 return id
[1] * id
[3] * id
[6];
1204 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1208 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1209 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1210 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1211 sectors
|= (tf
->lbah
& 0xff) << 16;
1212 sectors
|= (tf
->lbam
& 0xff) << 8;
1213 sectors
|= (tf
->lbal
& 0xff);
1218 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1222 sectors
|= (tf
->device
& 0x0f) << 24;
1223 sectors
|= (tf
->lbah
& 0xff) << 16;
1224 sectors
|= (tf
->lbam
& 0xff) << 8;
1225 sectors
|= (tf
->lbal
& 0xff);
1231 * ata_read_native_max_address - Read native max address
1232 * @dev: target device
1233 * @max_sectors: out parameter for the result native max address
1235 * Perform an LBA48 or LBA28 native size query upon the device in
1239 * 0 on success, -EACCES if command is aborted by the drive.
1240 * -EIO on other errors.
1242 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1244 unsigned int err_mask
;
1245 struct ata_taskfile tf
;
1246 int lba48
= ata_id_has_lba48(dev
->id
);
1248 ata_tf_init(dev
, &tf
);
1250 /* always clear all address registers */
1251 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1254 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1255 tf
.flags
|= ATA_TFLAG_LBA48
;
1257 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1259 tf
.protocol
|= ATA_PROT_NODATA
;
1260 tf
.device
|= ATA_LBA
;
1262 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1264 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1265 "max address (err_mask=0x%x)\n", err_mask
);
1266 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1272 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1274 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1275 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1281 * ata_set_max_sectors - Set max sectors
1282 * @dev: target device
1283 * @new_sectors: new max sectors value to set for the device
1285 * Set max sectors of @dev to @new_sectors.
1288 * 0 on success, -EACCES if command is aborted or denied (due to
1289 * previous non-volatile SET_MAX) by the drive. -EIO on other
1292 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1294 unsigned int err_mask
;
1295 struct ata_taskfile tf
;
1296 int lba48
= ata_id_has_lba48(dev
->id
);
1300 ata_tf_init(dev
, &tf
);
1302 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1305 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1306 tf
.flags
|= ATA_TFLAG_LBA48
;
1308 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1309 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1310 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1312 tf
.command
= ATA_CMD_SET_MAX
;
1314 tf
.device
|= (new_sectors
>> 24) & 0xf;
1317 tf
.protocol
|= ATA_PROT_NODATA
;
1318 tf
.device
|= ATA_LBA
;
1320 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1321 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1322 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1324 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1326 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1327 "max address (err_mask=0x%x)\n", err_mask
);
1328 if (err_mask
== AC_ERR_DEV
&&
1329 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1338 * ata_hpa_resize - Resize a device with an HPA set
1339 * @dev: Device to resize
1341 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1342 * it if required to the full size of the media. The caller must check
1343 * the drive has the HPA feature set enabled.
1346 * 0 on success, -errno on failure.
1348 static int ata_hpa_resize(struct ata_device
*dev
)
1350 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1351 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1352 u64 sectors
= ata_id_n_sectors(dev
->id
);
1356 /* do we need to do it? */
1357 if (dev
->class != ATA_DEV_ATA
||
1358 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1359 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1362 /* read native max address */
1363 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1365 /* If device aborted the command or HPA isn't going to
1366 * be unlocked, skip HPA resizing.
1368 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1369 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1370 "broken, skipping HPA handling\n");
1371 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1373 /* we can continue if device aborted the command */
1381 /* nothing to do? */
1382 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1383 if (!print_info
|| native_sectors
== sectors
)
1386 if (native_sectors
> sectors
)
1387 ata_dev_printk(dev
, KERN_INFO
,
1388 "HPA detected: current %llu, native %llu\n",
1389 (unsigned long long)sectors
,
1390 (unsigned long long)native_sectors
);
1391 else if (native_sectors
< sectors
)
1392 ata_dev_printk(dev
, KERN_WARNING
,
1393 "native sectors (%llu) is smaller than "
1395 (unsigned long long)native_sectors
,
1396 (unsigned long long)sectors
);
1400 /* let's unlock HPA */
1401 rc
= ata_set_max_sectors(dev
, native_sectors
);
1402 if (rc
== -EACCES
) {
1403 /* if device aborted the command, skip HPA resizing */
1404 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1405 "(%llu -> %llu), skipping HPA handling\n",
1406 (unsigned long long)sectors
,
1407 (unsigned long long)native_sectors
);
1408 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1413 /* re-read IDENTIFY data */
1414 rc
= ata_dev_reread_id(dev
, 0);
1416 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1417 "data after HPA resizing\n");
1422 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1423 ata_dev_printk(dev
, KERN_INFO
,
1424 "HPA unlocked: %llu -> %llu, native %llu\n",
1425 (unsigned long long)sectors
,
1426 (unsigned long long)new_sectors
,
1427 (unsigned long long)native_sectors
);
1434 * ata_dump_id - IDENTIFY DEVICE info debugging output
1435 * @id: IDENTIFY DEVICE page to dump
1437 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1444 static inline void ata_dump_id(const u16
*id
)
1446 DPRINTK("49==0x%04x "
1456 DPRINTK("80==0x%04x "
1466 DPRINTK("88==0x%04x "
1473 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1474 * @id: IDENTIFY data to compute xfer mask from
1476 * Compute the xfermask for this device. This is not as trivial
1477 * as it seems if we must consider early devices correctly.
1479 * FIXME: pre IDE drive timing (do we care ?).
1487 unsigned long ata_id_xfermask(const u16
*id
)
1489 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1491 /* Usual case. Word 53 indicates word 64 is valid */
1492 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1493 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1497 /* If word 64 isn't valid then Word 51 high byte holds
1498 * the PIO timing number for the maximum. Turn it into
1501 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1502 if (mode
< 5) /* Valid PIO range */
1503 pio_mask
= (2 << mode
) - 1;
1507 /* But wait.. there's more. Design your standards by
1508 * committee and you too can get a free iordy field to
1509 * process. However its the speeds not the modes that
1510 * are supported... Note drivers using the timing API
1511 * will get this right anyway
1515 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1517 if (ata_id_is_cfa(id
)) {
1519 * Process compact flash extended modes
1521 int pio
= id
[163] & 0x7;
1522 int dma
= (id
[163] >> 3) & 7;
1525 pio_mask
|= (1 << 5);
1527 pio_mask
|= (1 << 6);
1529 mwdma_mask
|= (1 << 3);
1531 mwdma_mask
|= (1 << 4);
1535 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1536 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1538 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1542 * ata_pio_queue_task - Queue port_task
1543 * @ap: The ata_port to queue port_task for
1544 * @fn: workqueue function to be scheduled
1545 * @data: data for @fn to use
1546 * @delay: delay time in msecs for workqueue function
1548 * Schedule @fn(@data) for execution after @delay jiffies using
1549 * port_task. There is one port_task per port and it's the
1550 * user(low level driver)'s responsibility to make sure that only
1551 * one task is active at any given time.
1553 * libata core layer takes care of synchronization between
1554 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1558 * Inherited from caller.
1560 void ata_pio_queue_task(struct ata_port
*ap
, void *data
, unsigned long delay
)
1562 ap
->port_task_data
= data
;
1564 /* may fail if ata_port_flush_task() in progress */
1565 queue_delayed_work(ata_wq
, &ap
->port_task
, msecs_to_jiffies(delay
));
1569 * ata_port_flush_task - Flush port_task
1570 * @ap: The ata_port to flush port_task for
1572 * After this function completes, port_task is guranteed not to
1573 * be running or scheduled.
1576 * Kernel thread context (may sleep)
1578 void ata_port_flush_task(struct ata_port
*ap
)
1582 cancel_rearming_delayed_work(&ap
->port_task
);
1584 if (ata_msg_ctl(ap
))
1585 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1588 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1590 struct completion
*waiting
= qc
->private_data
;
1596 * ata_exec_internal_sg - execute libata internal command
1597 * @dev: Device to which the command is sent
1598 * @tf: Taskfile registers for the command and the result
1599 * @cdb: CDB for packet command
1600 * @dma_dir: Data tranfer direction of the command
1601 * @sgl: sg list for the data buffer of the command
1602 * @n_elem: Number of sg entries
1603 * @timeout: Timeout in msecs (0 for default)
1605 * Executes libata internal command with timeout. @tf contains
1606 * command on entry and result on return. Timeout and error
1607 * conditions are reported via return value. No recovery action
1608 * is taken after a command times out. It's caller's duty to
1609 * clean up after timeout.
1612 * None. Should be called with kernel context, might sleep.
1615 * Zero on success, AC_ERR_* mask on failure
1617 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1618 struct ata_taskfile
*tf
, const u8
*cdb
,
1619 int dma_dir
, struct scatterlist
*sgl
,
1620 unsigned int n_elem
, unsigned long timeout
)
1622 struct ata_link
*link
= dev
->link
;
1623 struct ata_port
*ap
= link
->ap
;
1624 u8 command
= tf
->command
;
1625 int auto_timeout
= 0;
1626 struct ata_queued_cmd
*qc
;
1627 unsigned int tag
, preempted_tag
;
1628 u32 preempted_sactive
, preempted_qc_active
;
1629 int preempted_nr_active_links
;
1630 DECLARE_COMPLETION_ONSTACK(wait
);
1631 unsigned long flags
;
1632 unsigned int err_mask
;
1635 spin_lock_irqsave(ap
->lock
, flags
);
1637 /* no internal command while frozen */
1638 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1639 spin_unlock_irqrestore(ap
->lock
, flags
);
1640 return AC_ERR_SYSTEM
;
1643 /* initialize internal qc */
1645 /* XXX: Tag 0 is used for drivers with legacy EH as some
1646 * drivers choke if any other tag is given. This breaks
1647 * ata_tag_internal() test for those drivers. Don't use new
1648 * EH stuff without converting to it.
1650 if (ap
->ops
->error_handler
)
1651 tag
= ATA_TAG_INTERNAL
;
1655 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1657 qc
= __ata_qc_from_tag(ap
, tag
);
1665 preempted_tag
= link
->active_tag
;
1666 preempted_sactive
= link
->sactive
;
1667 preempted_qc_active
= ap
->qc_active
;
1668 preempted_nr_active_links
= ap
->nr_active_links
;
1669 link
->active_tag
= ATA_TAG_POISON
;
1672 ap
->nr_active_links
= 0;
1674 /* prepare & issue qc */
1677 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1678 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1679 qc
->dma_dir
= dma_dir
;
1680 if (dma_dir
!= DMA_NONE
) {
1681 unsigned int i
, buflen
= 0;
1682 struct scatterlist
*sg
;
1684 for_each_sg(sgl
, sg
, n_elem
, i
)
1685 buflen
+= sg
->length
;
1687 ata_sg_init(qc
, sgl
, n_elem
);
1688 qc
->nbytes
= buflen
;
1691 qc
->private_data
= &wait
;
1692 qc
->complete_fn
= ata_qc_complete_internal
;
1696 spin_unlock_irqrestore(ap
->lock
, flags
);
1699 if (ata_probe_timeout
)
1700 timeout
= ata_probe_timeout
* 1000;
1702 timeout
= ata_internal_cmd_timeout(dev
, command
);
1707 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1709 ata_port_flush_task(ap
);
1712 spin_lock_irqsave(ap
->lock
, flags
);
1714 /* We're racing with irq here. If we lose, the
1715 * following test prevents us from completing the qc
1716 * twice. If we win, the port is frozen and will be
1717 * cleaned up by ->post_internal_cmd().
1719 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1720 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1722 if (ap
->ops
->error_handler
)
1723 ata_port_freeze(ap
);
1725 ata_qc_complete(qc
);
1727 if (ata_msg_warn(ap
))
1728 ata_dev_printk(dev
, KERN_WARNING
,
1729 "qc timeout (cmd 0x%x)\n", command
);
1732 spin_unlock_irqrestore(ap
->lock
, flags
);
1735 /* do post_internal_cmd */
1736 if (ap
->ops
->post_internal_cmd
)
1737 ap
->ops
->post_internal_cmd(qc
);
1739 /* perform minimal error analysis */
1740 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1741 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1742 qc
->err_mask
|= AC_ERR_DEV
;
1745 qc
->err_mask
|= AC_ERR_OTHER
;
1747 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1748 qc
->err_mask
&= ~AC_ERR_OTHER
;
1752 spin_lock_irqsave(ap
->lock
, flags
);
1754 *tf
= qc
->result_tf
;
1755 err_mask
= qc
->err_mask
;
1758 link
->active_tag
= preempted_tag
;
1759 link
->sactive
= preempted_sactive
;
1760 ap
->qc_active
= preempted_qc_active
;
1761 ap
->nr_active_links
= preempted_nr_active_links
;
1763 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1764 * Until those drivers are fixed, we detect the condition
1765 * here, fail the command with AC_ERR_SYSTEM and reenable the
1768 * Note that this doesn't change any behavior as internal
1769 * command failure results in disabling the device in the
1770 * higher layer for LLDDs without new reset/EH callbacks.
1772 * Kill the following code as soon as those drivers are fixed.
1774 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1775 err_mask
|= AC_ERR_SYSTEM
;
1779 spin_unlock_irqrestore(ap
->lock
, flags
);
1781 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1782 ata_internal_cmd_timed_out(dev
, command
);
1788 * ata_exec_internal - execute libata internal command
1789 * @dev: Device to which the command is sent
1790 * @tf: Taskfile registers for the command and the result
1791 * @cdb: CDB for packet command
1792 * @dma_dir: Data tranfer direction of the command
1793 * @buf: Data buffer of the command
1794 * @buflen: Length of data buffer
1795 * @timeout: Timeout in msecs (0 for default)
1797 * Wrapper around ata_exec_internal_sg() which takes simple
1798 * buffer instead of sg list.
1801 * None. Should be called with kernel context, might sleep.
1804 * Zero on success, AC_ERR_* mask on failure
1806 unsigned ata_exec_internal(struct ata_device
*dev
,
1807 struct ata_taskfile
*tf
, const u8
*cdb
,
1808 int dma_dir
, void *buf
, unsigned int buflen
,
1809 unsigned long timeout
)
1811 struct scatterlist
*psg
= NULL
, sg
;
1812 unsigned int n_elem
= 0;
1814 if (dma_dir
!= DMA_NONE
) {
1816 sg_init_one(&sg
, buf
, buflen
);
1821 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1826 * ata_do_simple_cmd - execute simple internal command
1827 * @dev: Device to which the command is sent
1828 * @cmd: Opcode to execute
1830 * Execute a 'simple' command, that only consists of the opcode
1831 * 'cmd' itself, without filling any other registers
1834 * Kernel thread context (may sleep).
1837 * Zero on success, AC_ERR_* mask on failure
1839 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1841 struct ata_taskfile tf
;
1843 ata_tf_init(dev
, &tf
);
1846 tf
.flags
|= ATA_TFLAG_DEVICE
;
1847 tf
.protocol
= ATA_PROT_NODATA
;
1849 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1853 * ata_pio_need_iordy - check if iordy needed
1856 * Check if the current speed of the device requires IORDY. Used
1857 * by various controllers for chip configuration.
1860 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1862 /* Controller doesn't support IORDY. Probably a pointless check
1863 as the caller should know this */
1864 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1866 /* PIO3 and higher it is mandatory */
1867 if (adev
->pio_mode
> XFER_PIO_2
)
1869 /* We turn it on when possible */
1870 if (ata_id_has_iordy(adev
->id
))
1876 * ata_pio_mask_no_iordy - Return the non IORDY mask
1879 * Compute the highest mode possible if we are not using iordy. Return
1880 * -1 if no iordy mode is available.
1883 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1885 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1886 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1887 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1888 /* Is the speed faster than the drive allows non IORDY ? */
1890 /* This is cycle times not frequency - watch the logic! */
1891 if (pio
> 240) /* PIO2 is 240nS per cycle */
1892 return 3 << ATA_SHIFT_PIO
;
1893 return 7 << ATA_SHIFT_PIO
;
1896 return 3 << ATA_SHIFT_PIO
;
1900 * ata_do_dev_read_id - default ID read method
1902 * @tf: proposed taskfile
1905 * Issue the identify taskfile and hand back the buffer containing
1906 * identify data. For some RAID controllers and for pre ATA devices
1907 * this function is wrapped or replaced by the driver
1909 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
1910 struct ata_taskfile
*tf
, u16
*id
)
1912 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
1913 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1917 * ata_dev_read_id - Read ID data from the specified device
1918 * @dev: target device
1919 * @p_class: pointer to class of the target device (may be changed)
1920 * @flags: ATA_READID_* flags
1921 * @id: buffer to read IDENTIFY data into
1923 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1924 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1925 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1926 * for pre-ATA4 drives.
1928 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1929 * now we abort if we hit that case.
1932 * Kernel thread context (may sleep)
1935 * 0 on success, -errno otherwise.
1937 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1938 unsigned int flags
, u16
*id
)
1940 struct ata_port
*ap
= dev
->link
->ap
;
1941 unsigned int class = *p_class
;
1942 struct ata_taskfile tf
;
1943 unsigned int err_mask
= 0;
1945 int may_fallback
= 1, tried_spinup
= 0;
1948 if (ata_msg_ctl(ap
))
1949 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
1952 ata_tf_init(dev
, &tf
);
1956 tf
.command
= ATA_CMD_ID_ATA
;
1959 tf
.command
= ATA_CMD_ID_ATAPI
;
1963 reason
= "unsupported class";
1967 tf
.protocol
= ATA_PROT_PIO
;
1969 /* Some devices choke if TF registers contain garbage. Make
1970 * sure those are properly initialized.
1972 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1974 /* Device presence detection is unreliable on some
1975 * controllers. Always poll IDENTIFY if available.
1977 tf
.flags
|= ATA_TFLAG_POLLING
;
1979 if (ap
->ops
->read_id
)
1980 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
1982 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
1985 if (err_mask
& AC_ERR_NODEV_HINT
) {
1986 ata_dev_printk(dev
, KERN_DEBUG
,
1987 "NODEV after polling detection\n");
1991 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1992 /* Device or controller might have reported
1993 * the wrong device class. Give a shot at the
1994 * other IDENTIFY if the current one is
1995 * aborted by the device.
2000 if (class == ATA_DEV_ATA
)
2001 class = ATA_DEV_ATAPI
;
2003 class = ATA_DEV_ATA
;
2007 /* Control reaches here iff the device aborted
2008 * both flavors of IDENTIFYs which happens
2009 * sometimes with phantom devices.
2011 ata_dev_printk(dev
, KERN_DEBUG
,
2012 "both IDENTIFYs aborted, assuming NODEV\n");
2017 reason
= "I/O error";
2021 /* Falling back doesn't make sense if ID data was read
2022 * successfully at least once.
2026 swap_buf_le16(id
, ATA_ID_WORDS
);
2030 reason
= "device reports invalid type";
2032 if (class == ATA_DEV_ATA
) {
2033 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2036 if (ata_id_is_ata(id
))
2040 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2043 * Drive powered-up in standby mode, and requires a specific
2044 * SET_FEATURES spin-up subcommand before it will accept
2045 * anything other than the original IDENTIFY command.
2047 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2048 if (err_mask
&& id
[2] != 0x738c) {
2050 reason
= "SPINUP failed";
2054 * If the drive initially returned incomplete IDENTIFY info,
2055 * we now must reissue the IDENTIFY command.
2057 if (id
[2] == 0x37c8)
2061 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2063 * The exact sequence expected by certain pre-ATA4 drives is:
2065 * IDENTIFY (optional in early ATA)
2066 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2068 * Some drives were very specific about that exact sequence.
2070 * Note that ATA4 says lba is mandatory so the second check
2071 * shoud never trigger.
2073 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2074 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2077 reason
= "INIT_DEV_PARAMS failed";
2081 /* current CHS translation info (id[53-58]) might be
2082 * changed. reread the identify device info.
2084 flags
&= ~ATA_READID_POSTRESET
;
2094 if (ata_msg_warn(ap
))
2095 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2096 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2100 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2102 struct ata_port
*ap
= dev
->link
->ap
;
2103 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2106 static void ata_dev_config_ncq(struct ata_device
*dev
,
2107 char *desc
, size_t desc_sz
)
2109 struct ata_port
*ap
= dev
->link
->ap
;
2110 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2112 if (!ata_id_has_ncq(dev
->id
)) {
2116 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2117 snprintf(desc
, desc_sz
, "NCQ (not used)");
2120 if (ap
->flags
& ATA_FLAG_NCQ
) {
2121 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2122 dev
->flags
|= ATA_DFLAG_NCQ
;
2125 if (hdepth
>= ddepth
)
2126 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2128 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2132 * ata_dev_configure - Configure the specified ATA/ATAPI device
2133 * @dev: Target device to configure
2135 * Configure @dev according to @dev->id. Generic and low-level
2136 * driver specific fixups are also applied.
2139 * Kernel thread context (may sleep)
2142 * 0 on success, -errno otherwise
2144 int ata_dev_configure(struct ata_device
*dev
)
2146 struct ata_port
*ap
= dev
->link
->ap
;
2147 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2148 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2149 const u16
*id
= dev
->id
;
2150 unsigned long xfer_mask
;
2151 char revbuf
[7]; /* XYZ-99\0 */
2152 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2153 char modelbuf
[ATA_ID_PROD_LEN
+1];
2156 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2157 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2162 if (ata_msg_probe(ap
))
2163 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2166 dev
->horkage
|= ata_dev_blacklisted(dev
);
2167 ata_force_horkage(dev
);
2169 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2170 ata_dev_printk(dev
, KERN_INFO
,
2171 "unsupported device, disabling\n");
2172 ata_dev_disable(dev
);
2176 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2177 dev
->class == ATA_DEV_ATAPI
) {
2178 ata_dev_printk(dev
, KERN_WARNING
,
2179 "WARNING: ATAPI is %s, device ignored.\n",
2180 atapi_enabled
? "not supported with this driver"
2182 ata_dev_disable(dev
);
2186 /* let ACPI work its magic */
2187 rc
= ata_acpi_on_devcfg(dev
);
2191 /* massage HPA, do it early as it might change IDENTIFY data */
2192 rc
= ata_hpa_resize(dev
);
2196 /* print device capabilities */
2197 if (ata_msg_probe(ap
))
2198 ata_dev_printk(dev
, KERN_DEBUG
,
2199 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2200 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2202 id
[49], id
[82], id
[83], id
[84],
2203 id
[85], id
[86], id
[87], id
[88]);
2205 /* initialize to-be-configured parameters */
2206 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2207 dev
->max_sectors
= 0;
2215 * common ATA, ATAPI feature tests
2218 /* find max transfer mode; for printk only */
2219 xfer_mask
= ata_id_xfermask(id
);
2221 if (ata_msg_probe(ap
))
2224 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2225 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2228 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2231 /* ATA-specific feature tests */
2232 if (dev
->class == ATA_DEV_ATA
) {
2233 if (ata_id_is_cfa(id
)) {
2234 if (id
[162] & 1) /* CPRM may make this media unusable */
2235 ata_dev_printk(dev
, KERN_WARNING
,
2236 "supports DRM functions and may "
2237 "not be fully accessable.\n");
2238 snprintf(revbuf
, 7, "CFA");
2240 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2241 /* Warn the user if the device has TPM extensions */
2242 if (ata_id_has_tpm(id
))
2243 ata_dev_printk(dev
, KERN_WARNING
,
2244 "supports DRM functions and may "
2245 "not be fully accessable.\n");
2248 dev
->n_sectors
= ata_id_n_sectors(id
);
2250 if (dev
->id
[59] & 0x100)
2251 dev
->multi_count
= dev
->id
[59] & 0xff;
2253 if (ata_id_has_lba(id
)) {
2254 const char *lba_desc
;
2258 dev
->flags
|= ATA_DFLAG_LBA
;
2259 if (ata_id_has_lba48(id
)) {
2260 dev
->flags
|= ATA_DFLAG_LBA48
;
2263 if (dev
->n_sectors
>= (1UL << 28) &&
2264 ata_id_has_flush_ext(id
))
2265 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2269 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2271 /* print device info to dmesg */
2272 if (ata_msg_drv(ap
) && print_info
) {
2273 ata_dev_printk(dev
, KERN_INFO
,
2274 "%s: %s, %s, max %s\n",
2275 revbuf
, modelbuf
, fwrevbuf
,
2276 ata_mode_string(xfer_mask
));
2277 ata_dev_printk(dev
, KERN_INFO
,
2278 "%Lu sectors, multi %u: %s %s\n",
2279 (unsigned long long)dev
->n_sectors
,
2280 dev
->multi_count
, lba_desc
, ncq_desc
);
2285 /* Default translation */
2286 dev
->cylinders
= id
[1];
2288 dev
->sectors
= id
[6];
2290 if (ata_id_current_chs_valid(id
)) {
2291 /* Current CHS translation is valid. */
2292 dev
->cylinders
= id
[54];
2293 dev
->heads
= id
[55];
2294 dev
->sectors
= id
[56];
2297 /* print device info to dmesg */
2298 if (ata_msg_drv(ap
) && print_info
) {
2299 ata_dev_printk(dev
, KERN_INFO
,
2300 "%s: %s, %s, max %s\n",
2301 revbuf
, modelbuf
, fwrevbuf
,
2302 ata_mode_string(xfer_mask
));
2303 ata_dev_printk(dev
, KERN_INFO
,
2304 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2305 (unsigned long long)dev
->n_sectors
,
2306 dev
->multi_count
, dev
->cylinders
,
2307 dev
->heads
, dev
->sectors
);
2314 /* ATAPI-specific feature tests */
2315 else if (dev
->class == ATA_DEV_ATAPI
) {
2316 const char *cdb_intr_string
= "";
2317 const char *atapi_an_string
= "";
2318 const char *dma_dir_string
= "";
2321 rc
= atapi_cdb_len(id
);
2322 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2323 if (ata_msg_warn(ap
))
2324 ata_dev_printk(dev
, KERN_WARNING
,
2325 "unsupported CDB len\n");
2329 dev
->cdb_len
= (unsigned int) rc
;
2331 /* Enable ATAPI AN if both the host and device have
2332 * the support. If PMP is attached, SNTF is required
2333 * to enable ATAPI AN to discern between PHY status
2334 * changed notifications and ATAPI ANs.
2336 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2337 (!sata_pmp_attached(ap
) ||
2338 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2339 unsigned int err_mask
;
2341 /* issue SET feature command to turn this on */
2342 err_mask
= ata_dev_set_feature(dev
,
2343 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2345 ata_dev_printk(dev
, KERN_ERR
,
2346 "failed to enable ATAPI AN "
2347 "(err_mask=0x%x)\n", err_mask
);
2349 dev
->flags
|= ATA_DFLAG_AN
;
2350 atapi_an_string
= ", ATAPI AN";
2354 if (ata_id_cdb_intr(dev
->id
)) {
2355 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2356 cdb_intr_string
= ", CDB intr";
2359 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2360 dev
->flags
|= ATA_DFLAG_DMADIR
;
2361 dma_dir_string
= ", DMADIR";
2364 /* print device info to dmesg */
2365 if (ata_msg_drv(ap
) && print_info
)
2366 ata_dev_printk(dev
, KERN_INFO
,
2367 "ATAPI: %s, %s, max %s%s%s%s\n",
2369 ata_mode_string(xfer_mask
),
2370 cdb_intr_string
, atapi_an_string
,
2374 /* determine max_sectors */
2375 dev
->max_sectors
= ATA_MAX_SECTORS
;
2376 if (dev
->flags
& ATA_DFLAG_LBA48
)
2377 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2379 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2380 if (ata_id_has_hipm(dev
->id
))
2381 dev
->flags
|= ATA_DFLAG_HIPM
;
2382 if (ata_id_has_dipm(dev
->id
))
2383 dev
->flags
|= ATA_DFLAG_DIPM
;
2386 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2388 if (ata_dev_knobble(dev
)) {
2389 if (ata_msg_drv(ap
) && print_info
)
2390 ata_dev_printk(dev
, KERN_INFO
,
2391 "applying bridge limits\n");
2392 dev
->udma_mask
&= ATA_UDMA5
;
2393 dev
->max_sectors
= ATA_MAX_SECTORS
;
2396 if ((dev
->class == ATA_DEV_ATAPI
) &&
2397 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2398 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2399 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2402 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2403 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2406 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2407 dev
->horkage
|= ATA_HORKAGE_IPM
;
2409 /* reset link pm_policy for this port to no pm */
2410 ap
->pm_policy
= MAX_PERFORMANCE
;
2413 if (ap
->ops
->dev_config
)
2414 ap
->ops
->dev_config(dev
);
2416 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2417 /* Let the user know. We don't want to disallow opens for
2418 rescue purposes, or in case the vendor is just a blithering
2419 idiot. Do this after the dev_config call as some controllers
2420 with buggy firmware may want to avoid reporting false device
2424 ata_dev_printk(dev
, KERN_WARNING
,
2425 "Drive reports diagnostics failure. This may indicate a drive\n");
2426 ata_dev_printk(dev
, KERN_WARNING
,
2427 "fault or invalid emulation. Contact drive vendor for information.\n");
2431 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2432 ata_dev_printk(dev
, KERN_WARNING
, "WARNING: device requires "
2433 "firmware update to be fully functional.\n");
2434 ata_dev_printk(dev
, KERN_WARNING
, " contact the vendor "
2435 "or visit http://ata.wiki.kernel.org.\n");
2441 if (ata_msg_probe(ap
))
2442 ata_dev_printk(dev
, KERN_DEBUG
,
2443 "%s: EXIT, err\n", __func__
);
2448 * ata_cable_40wire - return 40 wire cable type
2451 * Helper method for drivers which want to hardwire 40 wire cable
2455 int ata_cable_40wire(struct ata_port
*ap
)
2457 return ATA_CBL_PATA40
;
2461 * ata_cable_80wire - return 80 wire cable type
2464 * Helper method for drivers which want to hardwire 80 wire cable
2468 int ata_cable_80wire(struct ata_port
*ap
)
2470 return ATA_CBL_PATA80
;
2474 * ata_cable_unknown - return unknown PATA cable.
2477 * Helper method for drivers which have no PATA cable detection.
2480 int ata_cable_unknown(struct ata_port
*ap
)
2482 return ATA_CBL_PATA_UNK
;
2486 * ata_cable_ignore - return ignored PATA cable.
2489 * Helper method for drivers which don't use cable type to limit
2492 int ata_cable_ignore(struct ata_port
*ap
)
2494 return ATA_CBL_PATA_IGN
;
2498 * ata_cable_sata - return SATA cable type
2501 * Helper method for drivers which have SATA cables
2504 int ata_cable_sata(struct ata_port
*ap
)
2506 return ATA_CBL_SATA
;
2510 * ata_bus_probe - Reset and probe ATA bus
2513 * Master ATA bus probing function. Initiates a hardware-dependent
2514 * bus reset, then attempts to identify any devices found on
2518 * PCI/etc. bus probe sem.
2521 * Zero on success, negative errno otherwise.
2524 int ata_bus_probe(struct ata_port
*ap
)
2526 unsigned int classes
[ATA_MAX_DEVICES
];
2527 int tries
[ATA_MAX_DEVICES
];
2529 struct ata_device
*dev
;
2533 ata_link_for_each_dev(dev
, &ap
->link
)
2534 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2537 ata_link_for_each_dev(dev
, &ap
->link
) {
2538 /* If we issue an SRST then an ATA drive (not ATAPI)
2539 * may change configuration and be in PIO0 timing. If
2540 * we do a hard reset (or are coming from power on)
2541 * this is true for ATA or ATAPI. Until we've set a
2542 * suitable controller mode we should not touch the
2543 * bus as we may be talking too fast.
2545 dev
->pio_mode
= XFER_PIO_0
;
2547 /* If the controller has a pio mode setup function
2548 * then use it to set the chipset to rights. Don't
2549 * touch the DMA setup as that will be dealt with when
2550 * configuring devices.
2552 if (ap
->ops
->set_piomode
)
2553 ap
->ops
->set_piomode(ap
, dev
);
2556 /* reset and determine device classes */
2557 ap
->ops
->phy_reset(ap
);
2559 ata_link_for_each_dev(dev
, &ap
->link
) {
2560 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2561 dev
->class != ATA_DEV_UNKNOWN
)
2562 classes
[dev
->devno
] = dev
->class;
2564 classes
[dev
->devno
] = ATA_DEV_NONE
;
2566 dev
->class = ATA_DEV_UNKNOWN
;
2571 /* read IDENTIFY page and configure devices. We have to do the identify
2572 specific sequence bass-ackwards so that PDIAG- is released by
2575 ata_link_for_each_dev_reverse(dev
, &ap
->link
) {
2576 if (tries
[dev
->devno
])
2577 dev
->class = classes
[dev
->devno
];
2579 if (!ata_dev_enabled(dev
))
2582 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2588 /* Now ask for the cable type as PDIAG- should have been released */
2589 if (ap
->ops
->cable_detect
)
2590 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2592 /* We may have SATA bridge glue hiding here irrespective of the
2593 reported cable types and sensed types */
2594 ata_link_for_each_dev(dev
, &ap
->link
) {
2595 if (!ata_dev_enabled(dev
))
2597 /* SATA drives indicate we have a bridge. We don't know which
2598 end of the link the bridge is which is a problem */
2599 if (ata_id_is_sata(dev
->id
))
2600 ap
->cbl
= ATA_CBL_SATA
;
2603 /* After the identify sequence we can now set up the devices. We do
2604 this in the normal order so that the user doesn't get confused */
2606 ata_link_for_each_dev(dev
, &ap
->link
) {
2607 if (!ata_dev_enabled(dev
))
2610 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2611 rc
= ata_dev_configure(dev
);
2612 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2617 /* configure transfer mode */
2618 rc
= ata_set_mode(&ap
->link
, &dev
);
2622 ata_link_for_each_dev(dev
, &ap
->link
)
2623 if (ata_dev_enabled(dev
))
2626 /* no device present, disable port */
2627 ata_port_disable(ap
);
2631 tries
[dev
->devno
]--;
2635 /* eeek, something went very wrong, give up */
2636 tries
[dev
->devno
] = 0;
2640 /* give it just one more chance */
2641 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2643 if (tries
[dev
->devno
] == 1) {
2644 /* This is the last chance, better to slow
2645 * down than lose it.
2647 sata_down_spd_limit(&ap
->link
);
2648 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2652 if (!tries
[dev
->devno
])
2653 ata_dev_disable(dev
);
2659 * ata_port_probe - Mark port as enabled
2660 * @ap: Port for which we indicate enablement
2662 * Modify @ap data structure such that the system
2663 * thinks that the entire port is enabled.
2665 * LOCKING: host lock, or some other form of
2669 void ata_port_probe(struct ata_port
*ap
)
2671 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2675 * sata_print_link_status - Print SATA link status
2676 * @link: SATA link to printk link status about
2678 * This function prints link speed and status of a SATA link.
2683 static void sata_print_link_status(struct ata_link
*link
)
2685 u32 sstatus
, scontrol
, tmp
;
2687 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2689 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2691 if (ata_link_online(link
)) {
2692 tmp
= (sstatus
>> 4) & 0xf;
2693 ata_link_printk(link
, KERN_INFO
,
2694 "SATA link up %s (SStatus %X SControl %X)\n",
2695 sata_spd_string(tmp
), sstatus
, scontrol
);
2697 ata_link_printk(link
, KERN_INFO
,
2698 "SATA link down (SStatus %X SControl %X)\n",
2704 * ata_dev_pair - return other device on cable
2707 * Obtain the other device on the same cable, or if none is
2708 * present NULL is returned
2711 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2713 struct ata_link
*link
= adev
->link
;
2714 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2715 if (!ata_dev_enabled(pair
))
2721 * ata_port_disable - Disable port.
2722 * @ap: Port to be disabled.
2724 * Modify @ap data structure such that the system
2725 * thinks that the entire port is disabled, and should
2726 * never attempt to probe or communicate with devices
2729 * LOCKING: host lock, or some other form of
2733 void ata_port_disable(struct ata_port
*ap
)
2735 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2736 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2737 ap
->flags
|= ATA_FLAG_DISABLED
;
2741 * sata_down_spd_limit - adjust SATA spd limit downward
2742 * @link: Link to adjust SATA spd limit for
2744 * Adjust SATA spd limit of @link downward. Note that this
2745 * function only adjusts the limit. The change must be applied
2746 * using sata_set_spd().
2749 * Inherited from caller.
2752 * 0 on success, negative errno on failure
2754 int sata_down_spd_limit(struct ata_link
*link
)
2756 u32 sstatus
, spd
, mask
;
2759 if (!sata_scr_valid(link
))
2762 /* If SCR can be read, use it to determine the current SPD.
2763 * If not, use cached value in link->sata_spd.
2765 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2767 spd
= (sstatus
>> 4) & 0xf;
2769 spd
= link
->sata_spd
;
2771 mask
= link
->sata_spd_limit
;
2775 /* unconditionally mask off the highest bit */
2776 highbit
= fls(mask
) - 1;
2777 mask
&= ~(1 << highbit
);
2779 /* Mask off all speeds higher than or equal to the current
2780 * one. Force 1.5Gbps if current SPD is not available.
2783 mask
&= (1 << (spd
- 1)) - 1;
2787 /* were we already at the bottom? */
2791 link
->sata_spd_limit
= mask
;
2793 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2794 sata_spd_string(fls(mask
)));
2799 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2801 struct ata_link
*host_link
= &link
->ap
->link
;
2802 u32 limit
, target
, spd
;
2804 limit
= link
->sata_spd_limit
;
2806 /* Don't configure downstream link faster than upstream link.
2807 * It doesn't speed up anything and some PMPs choke on such
2810 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2811 limit
&= (1 << host_link
->sata_spd
) - 1;
2813 if (limit
== UINT_MAX
)
2816 target
= fls(limit
);
2818 spd
= (*scontrol
>> 4) & 0xf;
2819 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2821 return spd
!= target
;
2825 * sata_set_spd_needed - is SATA spd configuration needed
2826 * @link: Link in question
2828 * Test whether the spd limit in SControl matches
2829 * @link->sata_spd_limit. This function is used to determine
2830 * whether hardreset is necessary to apply SATA spd
2834 * Inherited from caller.
2837 * 1 if SATA spd configuration is needed, 0 otherwise.
2839 static int sata_set_spd_needed(struct ata_link
*link
)
2843 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2846 return __sata_set_spd_needed(link
, &scontrol
);
2850 * sata_set_spd - set SATA spd according to spd limit
2851 * @link: Link to set SATA spd for
2853 * Set SATA spd of @link according to sata_spd_limit.
2856 * Inherited from caller.
2859 * 0 if spd doesn't need to be changed, 1 if spd has been
2860 * changed. Negative errno if SCR registers are inaccessible.
2862 int sata_set_spd(struct ata_link
*link
)
2867 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2870 if (!__sata_set_spd_needed(link
, &scontrol
))
2873 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2880 * This mode timing computation functionality is ported over from
2881 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2884 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2885 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2886 * for UDMA6, which is currently supported only by Maxtor drives.
2888 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2891 static const struct ata_timing ata_timing
[] = {
2892 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2893 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2894 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2895 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2896 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2897 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2898 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2899 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2901 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2902 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2903 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2905 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2906 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2907 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2908 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2909 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2911 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2912 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2913 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2914 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2915 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2916 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2917 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2918 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2923 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2924 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2926 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2928 q
->setup
= EZ(t
->setup
* 1000, T
);
2929 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2930 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2931 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2932 q
->active
= EZ(t
->active
* 1000, T
);
2933 q
->recover
= EZ(t
->recover
* 1000, T
);
2934 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2935 q
->udma
= EZ(t
->udma
* 1000, UT
);
2938 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2939 struct ata_timing
*m
, unsigned int what
)
2941 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2942 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2943 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2944 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2945 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2946 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2947 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2948 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2951 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2953 const struct ata_timing
*t
= ata_timing
;
2955 while (xfer_mode
> t
->mode
)
2958 if (xfer_mode
== t
->mode
)
2963 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2964 struct ata_timing
*t
, int T
, int UT
)
2966 const struct ata_timing
*s
;
2967 struct ata_timing p
;
2973 if (!(s
= ata_timing_find_mode(speed
)))
2976 memcpy(t
, s
, sizeof(*s
));
2979 * If the drive is an EIDE drive, it can tell us it needs extended
2980 * PIO/MW_DMA cycle timing.
2983 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2984 memset(&p
, 0, sizeof(p
));
2985 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2986 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2987 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2988 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2989 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2991 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2995 * Convert the timing to bus clock counts.
2998 ata_timing_quantize(t
, t
, T
, UT
);
3001 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3002 * S.M.A.R.T * and some other commands. We have to ensure that the
3003 * DMA cycle timing is slower/equal than the fastest PIO timing.
3006 if (speed
> XFER_PIO_6
) {
3007 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3008 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3012 * Lengthen active & recovery time so that cycle time is correct.
3015 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3016 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3017 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3020 if (t
->active
+ t
->recover
< t
->cycle
) {
3021 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3022 t
->recover
= t
->cycle
- t
->active
;
3025 /* In a few cases quantisation may produce enough errors to
3026 leave t->cycle too low for the sum of active and recovery
3027 if so we must correct this */
3028 if (t
->active
+ t
->recover
> t
->cycle
)
3029 t
->cycle
= t
->active
+ t
->recover
;
3035 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3036 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3037 * @cycle: cycle duration in ns
3039 * Return matching xfer mode for @cycle. The returned mode is of
3040 * the transfer type specified by @xfer_shift. If @cycle is too
3041 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3042 * than the fastest known mode, the fasted mode is returned.
3048 * Matching xfer_mode, 0xff if no match found.
3050 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3052 u8 base_mode
= 0xff, last_mode
= 0xff;
3053 const struct ata_xfer_ent
*ent
;
3054 const struct ata_timing
*t
;
3056 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3057 if (ent
->shift
== xfer_shift
)
3058 base_mode
= ent
->base
;
3060 for (t
= ata_timing_find_mode(base_mode
);
3061 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3062 unsigned short this_cycle
;
3064 switch (xfer_shift
) {
3066 case ATA_SHIFT_MWDMA
:
3067 this_cycle
= t
->cycle
;
3069 case ATA_SHIFT_UDMA
:
3070 this_cycle
= t
->udma
;
3076 if (cycle
> this_cycle
)
3079 last_mode
= t
->mode
;
3086 * ata_down_xfermask_limit - adjust dev xfer masks downward
3087 * @dev: Device to adjust xfer masks
3088 * @sel: ATA_DNXFER_* selector
3090 * Adjust xfer masks of @dev downward. Note that this function
3091 * does not apply the change. Invoking ata_set_mode() afterwards
3092 * will apply the limit.
3095 * Inherited from caller.
3098 * 0 on success, negative errno on failure
3100 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3103 unsigned long orig_mask
, xfer_mask
;
3104 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3107 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3108 sel
&= ~ATA_DNXFER_QUIET
;
3110 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3113 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3116 case ATA_DNXFER_PIO
:
3117 highbit
= fls(pio_mask
) - 1;
3118 pio_mask
&= ~(1 << highbit
);
3121 case ATA_DNXFER_DMA
:
3123 highbit
= fls(udma_mask
) - 1;
3124 udma_mask
&= ~(1 << highbit
);
3127 } else if (mwdma_mask
) {
3128 highbit
= fls(mwdma_mask
) - 1;
3129 mwdma_mask
&= ~(1 << highbit
);
3135 case ATA_DNXFER_40C
:
3136 udma_mask
&= ATA_UDMA_MASK_40C
;
3139 case ATA_DNXFER_FORCE_PIO0
:
3141 case ATA_DNXFER_FORCE_PIO
:
3150 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3152 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3156 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3157 snprintf(buf
, sizeof(buf
), "%s:%s",
3158 ata_mode_string(xfer_mask
),
3159 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3161 snprintf(buf
, sizeof(buf
), "%s",
3162 ata_mode_string(xfer_mask
));
3164 ata_dev_printk(dev
, KERN_WARNING
,
3165 "limiting speed to %s\n", buf
);
3168 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3174 static int ata_dev_set_mode(struct ata_device
*dev
)
3176 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3177 const char *dev_err_whine
= "";
3178 int ign_dev_err
= 0;
3179 unsigned int err_mask
;
3182 dev
->flags
&= ~ATA_DFLAG_PIO
;
3183 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3184 dev
->flags
|= ATA_DFLAG_PIO
;
3186 err_mask
= ata_dev_set_xfermode(dev
);
3188 if (err_mask
& ~AC_ERR_DEV
)
3192 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3193 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3194 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3198 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3199 /* Old CFA may refuse this command, which is just fine */
3200 if (ata_id_is_cfa(dev
->id
))
3202 /* Catch several broken garbage emulations plus some pre
3204 if (ata_id_major_version(dev
->id
) == 0 &&
3205 dev
->pio_mode
<= XFER_PIO_2
)
3207 /* Some very old devices and some bad newer ones fail
3208 any kind of SET_XFERMODE request but support PIO0-2
3209 timings and no IORDY */
3210 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3213 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3214 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3215 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3216 dev
->dma_mode
== XFER_MW_DMA_0
&&
3217 (dev
->id
[63] >> 8) & 1)
3220 /* if the device is actually configured correctly, ignore dev err */
3221 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3224 if (err_mask
& AC_ERR_DEV
) {
3228 dev_err_whine
= " (device error ignored)";
3231 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3232 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3234 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3235 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3241 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3242 "(err_mask=0x%x)\n", err_mask
);
3247 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3248 * @link: link on which timings will be programmed
3249 * @r_failed_dev: out parameter for failed device
3251 * Standard implementation of the function used to tune and set
3252 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3253 * ata_dev_set_mode() fails, pointer to the failing device is
3254 * returned in @r_failed_dev.
3257 * PCI/etc. bus probe sem.
3260 * 0 on success, negative errno otherwise
3263 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3265 struct ata_port
*ap
= link
->ap
;
3266 struct ata_device
*dev
;
3267 int rc
= 0, used_dma
= 0, found
= 0;
3269 /* step 1: calculate xfer_mask */
3270 ata_link_for_each_dev(dev
, link
) {
3271 unsigned long pio_mask
, dma_mask
;
3272 unsigned int mode_mask
;
3274 if (!ata_dev_enabled(dev
))
3277 mode_mask
= ATA_DMA_MASK_ATA
;
3278 if (dev
->class == ATA_DEV_ATAPI
)
3279 mode_mask
= ATA_DMA_MASK_ATAPI
;
3280 else if (ata_id_is_cfa(dev
->id
))
3281 mode_mask
= ATA_DMA_MASK_CFA
;
3283 ata_dev_xfermask(dev
);
3284 ata_force_xfermask(dev
);
3286 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3287 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3289 if (libata_dma_mask
& mode_mask
)
3290 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3294 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3295 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3298 if (ata_dma_enabled(dev
))
3304 /* step 2: always set host PIO timings */
3305 ata_link_for_each_dev(dev
, link
) {
3306 if (!ata_dev_enabled(dev
))
3309 if (dev
->pio_mode
== 0xff) {
3310 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3315 dev
->xfer_mode
= dev
->pio_mode
;
3316 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3317 if (ap
->ops
->set_piomode
)
3318 ap
->ops
->set_piomode(ap
, dev
);
3321 /* step 3: set host DMA timings */
3322 ata_link_for_each_dev(dev
, link
) {
3323 if (!ata_dev_enabled(dev
) || !ata_dma_enabled(dev
))
3326 dev
->xfer_mode
= dev
->dma_mode
;
3327 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3328 if (ap
->ops
->set_dmamode
)
3329 ap
->ops
->set_dmamode(ap
, dev
);
3332 /* step 4: update devices' xfer mode */
3333 ata_link_for_each_dev(dev
, link
) {
3334 /* don't update suspended devices' xfer mode */
3335 if (!ata_dev_enabled(dev
))
3338 rc
= ata_dev_set_mode(dev
);
3343 /* Record simplex status. If we selected DMA then the other
3344 * host channels are not permitted to do so.
3346 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3347 ap
->host
->simplex_claimed
= ap
;
3351 *r_failed_dev
= dev
;
3356 * ata_wait_ready - wait for link to become ready
3357 * @link: link to be waited on
3358 * @deadline: deadline jiffies for the operation
3359 * @check_ready: callback to check link readiness
3361 * Wait for @link to become ready. @check_ready should return
3362 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3363 * link doesn't seem to be occupied, other errno for other error
3366 * Transient -ENODEV conditions are allowed for
3367 * ATA_TMOUT_FF_WAIT.
3373 * 0 if @linke is ready before @deadline; otherwise, -errno.
3375 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3376 int (*check_ready
)(struct ata_link
*link
))
3378 unsigned long start
= jiffies
;
3379 unsigned long nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3382 if (time_after(nodev_deadline
, deadline
))
3383 nodev_deadline
= deadline
;
3386 unsigned long now
= jiffies
;
3389 ready
= tmp
= check_ready(link
);
3393 /* -ENODEV could be transient. Ignore -ENODEV if link
3394 * is online. Also, some SATA devices take a long
3395 * time to clear 0xff after reset. For example,
3396 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3397 * GoVault needs even more than that. Wait for
3398 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3400 * Note that some PATA controllers (pata_ali) explode
3401 * if status register is read more than once when
3402 * there's no device attached.
3404 if (ready
== -ENODEV
) {
3405 if (ata_link_online(link
))
3407 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3408 !ata_link_offline(link
) &&
3409 time_before(now
, nodev_deadline
))
3415 if (time_after(now
, deadline
))
3418 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3419 (deadline
- now
> 3 * HZ
)) {
3420 ata_link_printk(link
, KERN_WARNING
,
3421 "link is slow to respond, please be patient "
3422 "(ready=%d)\n", tmp
);
3431 * ata_wait_after_reset - wait for link to become ready after reset
3432 * @link: link to be waited on
3433 * @deadline: deadline jiffies for the operation
3434 * @check_ready: callback to check link readiness
3436 * Wait for @link to become ready after reset.
3442 * 0 if @linke is ready before @deadline; otherwise, -errno.
3444 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3445 int (*check_ready
)(struct ata_link
*link
))
3447 msleep(ATA_WAIT_AFTER_RESET
);
3449 return ata_wait_ready(link
, deadline
, check_ready
);
3453 * sata_link_debounce - debounce SATA phy status
3454 * @link: ATA link to debounce SATA phy status for
3455 * @params: timing parameters { interval, duratinon, timeout } in msec
3456 * @deadline: deadline jiffies for the operation
3458 * Make sure SStatus of @link reaches stable state, determined by
3459 * holding the same value where DET is not 1 for @duration polled
3460 * every @interval, before @timeout. Timeout constraints the
3461 * beginning of the stable state. Because DET gets stuck at 1 on
3462 * some controllers after hot unplugging, this functions waits
3463 * until timeout then returns 0 if DET is stable at 1.
3465 * @timeout is further limited by @deadline. The sooner of the
3469 * Kernel thread context (may sleep)
3472 * 0 on success, -errno on failure.
3474 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3475 unsigned long deadline
)
3477 unsigned long interval
= params
[0];
3478 unsigned long duration
= params
[1];
3479 unsigned long last_jiffies
, t
;
3483 t
= ata_deadline(jiffies
, params
[2]);
3484 if (time_before(t
, deadline
))
3487 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3492 last_jiffies
= jiffies
;
3496 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3502 if (cur
== 1 && time_before(jiffies
, deadline
))
3504 if (time_after(jiffies
,
3505 ata_deadline(last_jiffies
, duration
)))
3510 /* unstable, start over */
3512 last_jiffies
= jiffies
;
3514 /* Check deadline. If debouncing failed, return
3515 * -EPIPE to tell upper layer to lower link speed.
3517 if (time_after(jiffies
, deadline
))
3523 * sata_link_resume - resume SATA link
3524 * @link: ATA link to resume SATA
3525 * @params: timing parameters { interval, duratinon, timeout } in msec
3526 * @deadline: deadline jiffies for the operation
3528 * Resume SATA phy @link and debounce it.
3531 * Kernel thread context (may sleep)
3534 * 0 on success, -errno on failure.
3536 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3537 unsigned long deadline
)
3539 u32 scontrol
, serror
;
3542 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3545 scontrol
= (scontrol
& 0x0f0) | 0x300;
3547 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3550 /* Some PHYs react badly if SStatus is pounded immediately
3551 * after resuming. Delay 200ms before debouncing.
3555 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3558 /* clear SError, some PHYs require this even for SRST to work */
3559 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3560 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3562 return rc
!= -EINVAL
? rc
: 0;
3566 * ata_std_prereset - prepare for reset
3567 * @link: ATA link to be reset
3568 * @deadline: deadline jiffies for the operation
3570 * @link is about to be reset. Initialize it. Failure from
3571 * prereset makes libata abort whole reset sequence and give up
3572 * that port, so prereset should be best-effort. It does its
3573 * best to prepare for reset sequence but if things go wrong, it
3574 * should just whine, not fail.
3577 * Kernel thread context (may sleep)
3580 * 0 on success, -errno otherwise.
3582 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3584 struct ata_port
*ap
= link
->ap
;
3585 struct ata_eh_context
*ehc
= &link
->eh_context
;
3586 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3589 /* if we're about to do hardreset, nothing more to do */
3590 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3593 /* if SATA, resume link */
3594 if (ap
->flags
& ATA_FLAG_SATA
) {
3595 rc
= sata_link_resume(link
, timing
, deadline
);
3596 /* whine about phy resume failure but proceed */
3597 if (rc
&& rc
!= -EOPNOTSUPP
)
3598 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3599 "link for reset (errno=%d)\n", rc
);
3602 /* no point in trying softreset on offline link */
3603 if (ata_link_offline(link
))
3604 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3610 * sata_link_hardreset - reset link via SATA phy reset
3611 * @link: link to reset
3612 * @timing: timing parameters { interval, duratinon, timeout } in msec
3613 * @deadline: deadline jiffies for the operation
3614 * @online: optional out parameter indicating link onlineness
3615 * @check_ready: optional callback to check link readiness
3617 * SATA phy-reset @link using DET bits of SControl register.
3618 * After hardreset, link readiness is waited upon using
3619 * ata_wait_ready() if @check_ready is specified. LLDs are
3620 * allowed to not specify @check_ready and wait itself after this
3621 * function returns. Device classification is LLD's
3624 * *@online is set to one iff reset succeeded and @link is online
3628 * Kernel thread context (may sleep)
3631 * 0 on success, -errno otherwise.
3633 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3634 unsigned long deadline
,
3635 bool *online
, int (*check_ready
)(struct ata_link
*))
3645 if (sata_set_spd_needed(link
)) {
3646 /* SATA spec says nothing about how to reconfigure
3647 * spd. To be on the safe side, turn off phy during
3648 * reconfiguration. This works for at least ICH7 AHCI
3651 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3654 scontrol
= (scontrol
& 0x0f0) | 0x304;
3656 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3662 /* issue phy wake/reset */
3663 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3666 scontrol
= (scontrol
& 0x0f0) | 0x301;
3668 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3671 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3672 * 10.4.2 says at least 1 ms.
3676 /* bring link back */
3677 rc
= sata_link_resume(link
, timing
, deadline
);
3680 /* if link is offline nothing more to do */
3681 if (ata_link_offline(link
))
3684 /* Link is online. From this point, -ENODEV too is an error. */
3688 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3689 /* If PMP is supported, we have to do follow-up SRST.
3690 * Some PMPs don't send D2H Reg FIS after hardreset if
3691 * the first port is empty. Wait only for
3692 * ATA_TMOUT_PMP_SRST_WAIT.
3695 unsigned long pmp_deadline
;
3697 pmp_deadline
= ata_deadline(jiffies
,
3698 ATA_TMOUT_PMP_SRST_WAIT
);
3699 if (time_after(pmp_deadline
, deadline
))
3700 pmp_deadline
= deadline
;
3701 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3709 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3711 if (rc
&& rc
!= -EAGAIN
) {
3712 /* online is set iff link is online && reset succeeded */
3715 ata_link_printk(link
, KERN_ERR
,
3716 "COMRESET failed (errno=%d)\n", rc
);
3718 DPRINTK("EXIT, rc=%d\n", rc
);
3723 * sata_std_hardreset - COMRESET w/o waiting or classification
3724 * @link: link to reset
3725 * @class: resulting class of attached device
3726 * @deadline: deadline jiffies for the operation
3728 * Standard SATA COMRESET w/o waiting or classification.
3731 * Kernel thread context (may sleep)
3734 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3736 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3737 unsigned long deadline
)
3739 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3744 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3745 return online
? -EAGAIN
: rc
;
3749 * ata_std_postreset - standard postreset callback
3750 * @link: the target ata_link
3751 * @classes: classes of attached devices
3753 * This function is invoked after a successful reset. Note that
3754 * the device might have been reset more than once using
3755 * different reset methods before postreset is invoked.
3758 * Kernel thread context (may sleep)
3760 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3766 /* reset complete, clear SError */
3767 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3768 sata_scr_write(link
, SCR_ERROR
, serror
);
3770 /* print link status */
3771 sata_print_link_status(link
);
3777 * ata_dev_same_device - Determine whether new ID matches configured device
3778 * @dev: device to compare against
3779 * @new_class: class of the new device
3780 * @new_id: IDENTIFY page of the new device
3782 * Compare @new_class and @new_id against @dev and determine
3783 * whether @dev is the device indicated by @new_class and
3790 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3792 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3795 const u16
*old_id
= dev
->id
;
3796 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3797 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3799 if (dev
->class != new_class
) {
3800 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3801 dev
->class, new_class
);
3805 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3806 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3807 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3808 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3810 if (strcmp(model
[0], model
[1])) {
3811 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3812 "'%s' != '%s'\n", model
[0], model
[1]);
3816 if (strcmp(serial
[0], serial
[1])) {
3817 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3818 "'%s' != '%s'\n", serial
[0], serial
[1]);
3826 * ata_dev_reread_id - Re-read IDENTIFY data
3827 * @dev: target ATA device
3828 * @readid_flags: read ID flags
3830 * Re-read IDENTIFY page and make sure @dev is still attached to
3834 * Kernel thread context (may sleep)
3837 * 0 on success, negative errno otherwise
3839 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3841 unsigned int class = dev
->class;
3842 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3846 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3850 /* is the device still there? */
3851 if (!ata_dev_same_device(dev
, class, id
))
3854 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3859 * ata_dev_revalidate - Revalidate ATA device
3860 * @dev: device to revalidate
3861 * @new_class: new class code
3862 * @readid_flags: read ID flags
3864 * Re-read IDENTIFY page, make sure @dev is still attached to the
3865 * port and reconfigure it according to the new IDENTIFY page.
3868 * Kernel thread context (may sleep)
3871 * 0 on success, negative errno otherwise
3873 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3874 unsigned int readid_flags
)
3876 u64 n_sectors
= dev
->n_sectors
;
3879 if (!ata_dev_enabled(dev
))
3882 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3883 if (ata_class_enabled(new_class
) &&
3884 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3885 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3886 dev
->class, new_class
);
3892 rc
= ata_dev_reread_id(dev
, readid_flags
);
3896 /* configure device according to the new ID */
3897 rc
= ata_dev_configure(dev
);
3901 /* verify n_sectors hasn't changed */
3902 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3903 dev
->n_sectors
!= n_sectors
) {
3904 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3906 (unsigned long long)n_sectors
,
3907 (unsigned long long)dev
->n_sectors
);
3909 /* restore original n_sectors */
3910 dev
->n_sectors
= n_sectors
;
3919 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3923 struct ata_blacklist_entry
{
3924 const char *model_num
;
3925 const char *model_rev
;
3926 unsigned long horkage
;
3929 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3930 /* Devices with DMA related problems under Linux */
3931 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3932 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3933 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3934 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3935 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3936 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3937 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3938 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3939 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3940 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3941 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3942 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3943 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3944 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3945 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3946 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3947 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3948 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3949 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3950 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3951 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3952 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3953 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3954 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3955 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3956 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3957 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3958 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3959 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3960 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3961 /* Odd clown on sil3726/4726 PMPs */
3962 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
3964 /* Weird ATAPI devices */
3965 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3967 /* Devices we expect to fail diagnostics */
3969 /* Devices where NCQ should be avoided */
3971 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3972 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3973 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3974 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3976 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3977 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3978 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3979 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3981 /* Seagate NCQ + FLUSH CACHE firmware bug */
3982 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ
|
3983 ATA_HORKAGE_FIRMWARE_WARN
},
3984 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ
|
3985 ATA_HORKAGE_FIRMWARE_WARN
},
3986 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ
|
3987 ATA_HORKAGE_FIRMWARE_WARN
},
3988 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ
|
3989 ATA_HORKAGE_FIRMWARE_WARN
},
3990 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ
|
3991 ATA_HORKAGE_FIRMWARE_WARN
},
3993 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ
|
3994 ATA_HORKAGE_FIRMWARE_WARN
},
3995 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ
|
3996 ATA_HORKAGE_FIRMWARE_WARN
},
3997 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ
|
3998 ATA_HORKAGE_FIRMWARE_WARN
},
3999 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ
|
4000 ATA_HORKAGE_FIRMWARE_WARN
},
4001 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ
|
4002 ATA_HORKAGE_FIRMWARE_WARN
},
4004 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ
|
4005 ATA_HORKAGE_FIRMWARE_WARN
},
4006 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ
|
4007 ATA_HORKAGE_FIRMWARE_WARN
},
4008 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ
|
4009 ATA_HORKAGE_FIRMWARE_WARN
},
4010 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ
|
4011 ATA_HORKAGE_FIRMWARE_WARN
},
4012 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ
|
4013 ATA_HORKAGE_FIRMWARE_WARN
},
4015 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ
|
4016 ATA_HORKAGE_FIRMWARE_WARN
},
4017 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ
|
4018 ATA_HORKAGE_FIRMWARE_WARN
},
4019 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ
|
4020 ATA_HORKAGE_FIRMWARE_WARN
},
4021 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ
|
4022 ATA_HORKAGE_FIRMWARE_WARN
},
4023 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ
|
4024 ATA_HORKAGE_FIRMWARE_WARN
},
4026 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ
|
4027 ATA_HORKAGE_FIRMWARE_WARN
},
4028 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ
|
4029 ATA_HORKAGE_FIRMWARE_WARN
},
4030 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ
|
4031 ATA_HORKAGE_FIRMWARE_WARN
},
4032 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ
|
4033 ATA_HORKAGE_FIRMWARE_WARN
},
4034 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ
|
4035 ATA_HORKAGE_FIRMWARE_WARN
},
4037 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ
|
4038 ATA_HORKAGE_FIRMWARE_WARN
},
4039 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ
|
4040 ATA_HORKAGE_FIRMWARE_WARN
},
4041 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ
|
4042 ATA_HORKAGE_FIRMWARE_WARN
},
4043 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ
|
4044 ATA_HORKAGE_FIRMWARE_WARN
},
4045 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ
|
4046 ATA_HORKAGE_FIRMWARE_WARN
},
4048 /* Blacklist entries taken from Silicon Image 3124/3132
4049 Windows driver .inf file - also several Linux problem reports */
4050 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4051 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4052 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4054 /* devices which puke on READ_NATIVE_MAX */
4055 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4056 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4057 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4058 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4060 /* Devices which report 1 sector over size HPA */
4061 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4062 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4063 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4065 /* Devices which get the IVB wrong */
4066 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4067 /* Maybe we should just blacklist TSSTcorp... */
4068 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB
, },
4069 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB
, },
4070 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4071 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4072 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4073 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4079 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4085 * check for trailing wildcard: *\0
4087 p
= strchr(patt
, wildchar
);
4088 if (p
&& ((*(p
+ 1)) == 0))
4099 return strncmp(patt
, name
, len
);
4102 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4104 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4105 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4106 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4108 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4109 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4111 while (ad
->model_num
) {
4112 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4113 if (ad
->model_rev
== NULL
)
4115 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4123 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4125 /* We don't support polling DMA.
4126 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4127 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4129 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4130 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4132 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4136 * ata_is_40wire - check drive side detection
4139 * Perform drive side detection decoding, allowing for device vendors
4140 * who can't follow the documentation.
4143 static int ata_is_40wire(struct ata_device
*dev
)
4145 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4146 return ata_drive_40wire_relaxed(dev
->id
);
4147 return ata_drive_40wire(dev
->id
);
4151 * cable_is_40wire - 40/80/SATA decider
4152 * @ap: port to consider
4154 * This function encapsulates the policy for speed management
4155 * in one place. At the moment we don't cache the result but
4156 * there is a good case for setting ap->cbl to the result when
4157 * we are called with unknown cables (and figuring out if it
4158 * impacts hotplug at all).
4160 * Return 1 if the cable appears to be 40 wire.
4163 static int cable_is_40wire(struct ata_port
*ap
)
4165 struct ata_link
*link
;
4166 struct ata_device
*dev
;
4168 /* If the controller thinks we are 40 wire, we are */
4169 if (ap
->cbl
== ATA_CBL_PATA40
)
4171 /* If the controller thinks we are 80 wire, we are */
4172 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4174 /* If the system is known to be 40 wire short cable (eg laptop),
4175 then we allow 80 wire modes even if the drive isn't sure */
4176 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4178 /* If the controller doesn't know we scan
4180 - Note: We look for all 40 wire detects at this point.
4181 Any 80 wire detect is taken to be 80 wire cable
4183 - In many setups only the one drive (slave if present)
4184 will give a valid detect
4185 - If you have a non detect capable drive you don't
4186 want it to colour the choice
4188 ata_port_for_each_link(link
, ap
) {
4189 ata_link_for_each_dev(dev
, link
) {
4190 if (!ata_is_40wire(dev
))
4198 * ata_dev_xfermask - Compute supported xfermask of the given device
4199 * @dev: Device to compute xfermask for
4201 * Compute supported xfermask of @dev and store it in
4202 * dev->*_mask. This function is responsible for applying all
4203 * known limits including host controller limits, device
4209 static void ata_dev_xfermask(struct ata_device
*dev
)
4211 struct ata_link
*link
= dev
->link
;
4212 struct ata_port
*ap
= link
->ap
;
4213 struct ata_host
*host
= ap
->host
;
4214 unsigned long xfer_mask
;
4216 /* controller modes available */
4217 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4218 ap
->mwdma_mask
, ap
->udma_mask
);
4220 /* drive modes available */
4221 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4222 dev
->mwdma_mask
, dev
->udma_mask
);
4223 xfer_mask
&= ata_id_xfermask(dev
->id
);
4226 * CFA Advanced TrueIDE timings are not allowed on a shared
4229 if (ata_dev_pair(dev
)) {
4230 /* No PIO5 or PIO6 */
4231 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4232 /* No MWDMA3 or MWDMA 4 */
4233 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4236 if (ata_dma_blacklisted(dev
)) {
4237 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4238 ata_dev_printk(dev
, KERN_WARNING
,
4239 "device is on DMA blacklist, disabling DMA\n");
4242 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4243 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4244 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4245 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4246 "other device, disabling DMA\n");
4249 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4250 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4252 if (ap
->ops
->mode_filter
)
4253 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4255 /* Apply cable rule here. Don't apply it early because when
4256 * we handle hot plug the cable type can itself change.
4257 * Check this last so that we know if the transfer rate was
4258 * solely limited by the cable.
4259 * Unknown or 80 wire cables reported host side are checked
4260 * drive side as well. Cases where we know a 40wire cable
4261 * is used safely for 80 are not checked here.
4263 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4264 /* UDMA/44 or higher would be available */
4265 if (cable_is_40wire(ap
)) {
4266 ata_dev_printk(dev
, KERN_WARNING
,
4267 "limited to UDMA/33 due to 40-wire cable\n");
4268 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4271 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4272 &dev
->mwdma_mask
, &dev
->udma_mask
);
4276 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4277 * @dev: Device to which command will be sent
4279 * Issue SET FEATURES - XFER MODE command to device @dev
4283 * PCI/etc. bus probe sem.
4286 * 0 on success, AC_ERR_* mask otherwise.
4289 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4291 struct ata_taskfile tf
;
4292 unsigned int err_mask
;
4294 /* set up set-features taskfile */
4295 DPRINTK("set features - xfer mode\n");
4297 /* Some controllers and ATAPI devices show flaky interrupt
4298 * behavior after setting xfer mode. Use polling instead.
4300 ata_tf_init(dev
, &tf
);
4301 tf
.command
= ATA_CMD_SET_FEATURES
;
4302 tf
.feature
= SETFEATURES_XFER
;
4303 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4304 tf
.protocol
= ATA_PROT_NODATA
;
4305 /* If we are using IORDY we must send the mode setting command */
4306 if (ata_pio_need_iordy(dev
))
4307 tf
.nsect
= dev
->xfer_mode
;
4308 /* If the device has IORDY and the controller does not - turn it off */
4309 else if (ata_id_has_iordy(dev
->id
))
4311 else /* In the ancient relic department - skip all of this */
4314 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4316 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4320 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4321 * @dev: Device to which command will be sent
4322 * @enable: Whether to enable or disable the feature
4323 * @feature: The sector count represents the feature to set
4325 * Issue SET FEATURES - SATA FEATURES command to device @dev
4326 * on port @ap with sector count
4329 * PCI/etc. bus probe sem.
4332 * 0 on success, AC_ERR_* mask otherwise.
4334 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4337 struct ata_taskfile tf
;
4338 unsigned int err_mask
;
4340 /* set up set-features taskfile */
4341 DPRINTK("set features - SATA features\n");
4343 ata_tf_init(dev
, &tf
);
4344 tf
.command
= ATA_CMD_SET_FEATURES
;
4345 tf
.feature
= enable
;
4346 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4347 tf
.protocol
= ATA_PROT_NODATA
;
4350 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4352 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4357 * ata_dev_init_params - Issue INIT DEV PARAMS command
4358 * @dev: Device to which command will be sent
4359 * @heads: Number of heads (taskfile parameter)
4360 * @sectors: Number of sectors (taskfile parameter)
4363 * Kernel thread context (may sleep)
4366 * 0 on success, AC_ERR_* mask otherwise.
4368 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4369 u16 heads
, u16 sectors
)
4371 struct ata_taskfile tf
;
4372 unsigned int err_mask
;
4374 /* Number of sectors per track 1-255. Number of heads 1-16 */
4375 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4376 return AC_ERR_INVALID
;
4378 /* set up init dev params taskfile */
4379 DPRINTK("init dev params \n");
4381 ata_tf_init(dev
, &tf
);
4382 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4383 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4384 tf
.protocol
= ATA_PROT_NODATA
;
4386 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4388 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4389 /* A clean abort indicates an original or just out of spec drive
4390 and we should continue as we issue the setup based on the
4391 drive reported working geometry */
4392 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4395 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4400 * ata_sg_clean - Unmap DMA memory associated with command
4401 * @qc: Command containing DMA memory to be released
4403 * Unmap all mapped DMA memory associated with this command.
4406 * spin_lock_irqsave(host lock)
4408 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4410 struct ata_port
*ap
= qc
->ap
;
4411 struct scatterlist
*sg
= qc
->sg
;
4412 int dir
= qc
->dma_dir
;
4414 WARN_ON(sg
== NULL
);
4416 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4419 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4421 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4426 * atapi_check_dma - Check whether ATAPI DMA can be supported
4427 * @qc: Metadata associated with taskfile to check
4429 * Allow low-level driver to filter ATA PACKET commands, returning
4430 * a status indicating whether or not it is OK to use DMA for the
4431 * supplied PACKET command.
4434 * spin_lock_irqsave(host lock)
4436 * RETURNS: 0 when ATAPI DMA can be used
4439 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4441 struct ata_port
*ap
= qc
->ap
;
4443 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4444 * few ATAPI devices choke on such DMA requests.
4446 if (unlikely(qc
->nbytes
& 15))
4449 if (ap
->ops
->check_atapi_dma
)
4450 return ap
->ops
->check_atapi_dma(qc
);
4456 * ata_std_qc_defer - Check whether a qc needs to be deferred
4457 * @qc: ATA command in question
4459 * Non-NCQ commands cannot run with any other command, NCQ or
4460 * not. As upper layer only knows the queue depth, we are
4461 * responsible for maintaining exclusion. This function checks
4462 * whether a new command @qc can be issued.
4465 * spin_lock_irqsave(host lock)
4468 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4470 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4472 struct ata_link
*link
= qc
->dev
->link
;
4474 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4475 if (!ata_tag_valid(link
->active_tag
))
4478 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4482 return ATA_DEFER_LINK
;
4485 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4488 * ata_sg_init - Associate command with scatter-gather table.
4489 * @qc: Command to be associated
4490 * @sg: Scatter-gather table.
4491 * @n_elem: Number of elements in s/g table.
4493 * Initialize the data-related elements of queued_cmd @qc
4494 * to point to a scatter-gather table @sg, containing @n_elem
4498 * spin_lock_irqsave(host lock)
4500 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4501 unsigned int n_elem
)
4504 qc
->n_elem
= n_elem
;
4509 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4510 * @qc: Command with scatter-gather table to be mapped.
4512 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4515 * spin_lock_irqsave(host lock)
4518 * Zero on success, negative on error.
4521 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4523 struct ata_port
*ap
= qc
->ap
;
4524 unsigned int n_elem
;
4526 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4528 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4532 DPRINTK("%d sg elements mapped\n", n_elem
);
4534 qc
->n_elem
= n_elem
;
4535 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4541 * swap_buf_le16 - swap halves of 16-bit words in place
4542 * @buf: Buffer to swap
4543 * @buf_words: Number of 16-bit words in buffer.
4545 * Swap halves of 16-bit words if needed to convert from
4546 * little-endian byte order to native cpu byte order, or
4550 * Inherited from caller.
4552 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4557 for (i
= 0; i
< buf_words
; i
++)
4558 buf
[i
] = le16_to_cpu(buf
[i
]);
4559 #endif /* __BIG_ENDIAN */
4563 * ata_qc_new - Request an available ATA command, for queueing
4564 * @ap: Port associated with device @dev
4565 * @dev: Device from whom we request an available command structure
4571 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4573 struct ata_queued_cmd
*qc
= NULL
;
4576 /* no command while frozen */
4577 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4580 /* the last tag is reserved for internal command. */
4581 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4582 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4583 qc
= __ata_qc_from_tag(ap
, i
);
4594 * ata_qc_new_init - Request an available ATA command, and initialize it
4595 * @dev: Device from whom we request an available command structure
4601 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4603 struct ata_port
*ap
= dev
->link
->ap
;
4604 struct ata_queued_cmd
*qc
;
4606 qc
= ata_qc_new(ap
);
4619 * ata_qc_free - free unused ata_queued_cmd
4620 * @qc: Command to complete
4622 * Designed to free unused ata_queued_cmd object
4623 * in case something prevents using it.
4626 * spin_lock_irqsave(host lock)
4628 void ata_qc_free(struct ata_queued_cmd
*qc
)
4630 struct ata_port
*ap
= qc
->ap
;
4633 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4637 if (likely(ata_tag_valid(tag
))) {
4638 qc
->tag
= ATA_TAG_POISON
;
4639 clear_bit(tag
, &ap
->qc_allocated
);
4643 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4645 struct ata_port
*ap
= qc
->ap
;
4646 struct ata_link
*link
= qc
->dev
->link
;
4648 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4649 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4651 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4654 /* command should be marked inactive atomically with qc completion */
4655 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4656 link
->sactive
&= ~(1 << qc
->tag
);
4658 ap
->nr_active_links
--;
4660 link
->active_tag
= ATA_TAG_POISON
;
4661 ap
->nr_active_links
--;
4664 /* clear exclusive status */
4665 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4666 ap
->excl_link
== link
))
4667 ap
->excl_link
= NULL
;
4669 /* atapi: mark qc as inactive to prevent the interrupt handler
4670 * from completing the command twice later, before the error handler
4671 * is called. (when rc != 0 and atapi request sense is needed)
4673 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4674 ap
->qc_active
&= ~(1 << qc
->tag
);
4676 /* call completion callback */
4677 qc
->complete_fn(qc
);
4680 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4682 struct ata_port
*ap
= qc
->ap
;
4684 qc
->result_tf
.flags
= qc
->tf
.flags
;
4685 ap
->ops
->qc_fill_rtf(qc
);
4688 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4690 struct ata_device
*dev
= qc
->dev
;
4692 if (ata_tag_internal(qc
->tag
))
4695 if (ata_is_nodata(qc
->tf
.protocol
))
4698 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4701 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4705 * ata_qc_complete - Complete an active ATA command
4706 * @qc: Command to complete
4707 * @err_mask: ATA Status register contents
4709 * Indicate to the mid and upper layers that an ATA
4710 * command has completed, with either an ok or not-ok status.
4713 * spin_lock_irqsave(host lock)
4715 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4717 struct ata_port
*ap
= qc
->ap
;
4719 /* XXX: New EH and old EH use different mechanisms to
4720 * synchronize EH with regular execution path.
4722 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4723 * Normal execution path is responsible for not accessing a
4724 * failed qc. libata core enforces the rule by returning NULL
4725 * from ata_qc_from_tag() for failed qcs.
4727 * Old EH depends on ata_qc_complete() nullifying completion
4728 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4729 * not synchronize with interrupt handler. Only PIO task is
4732 if (ap
->ops
->error_handler
) {
4733 struct ata_device
*dev
= qc
->dev
;
4734 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4736 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4738 if (unlikely(qc
->err_mask
))
4739 qc
->flags
|= ATA_QCFLAG_FAILED
;
4741 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4742 if (!ata_tag_internal(qc
->tag
)) {
4743 /* always fill result TF for failed qc */
4745 ata_qc_schedule_eh(qc
);
4750 /* read result TF if requested */
4751 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4754 /* Some commands need post-processing after successful
4757 switch (qc
->tf
.command
) {
4758 case ATA_CMD_SET_FEATURES
:
4759 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4760 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4763 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4764 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4765 /* revalidate device */
4766 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4767 ata_port_schedule_eh(ap
);
4771 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4775 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4776 ata_verify_xfer(qc
);
4778 __ata_qc_complete(qc
);
4780 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4783 /* read result TF if failed or requested */
4784 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4787 __ata_qc_complete(qc
);
4792 * ata_qc_complete_multiple - Complete multiple qcs successfully
4793 * @ap: port in question
4794 * @qc_active: new qc_active mask
4796 * Complete in-flight commands. This functions is meant to be
4797 * called from low-level driver's interrupt routine to complete
4798 * requests normally. ap->qc_active and @qc_active is compared
4799 * and commands are completed accordingly.
4802 * spin_lock_irqsave(host lock)
4805 * Number of completed commands on success, -errno otherwise.
4807 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
4813 done_mask
= ap
->qc_active
^ qc_active
;
4815 if (unlikely(done_mask
& qc_active
)) {
4816 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4817 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4821 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4822 struct ata_queued_cmd
*qc
;
4824 if (!(done_mask
& (1 << i
)))
4827 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4828 ata_qc_complete(qc
);
4837 * ata_qc_issue - issue taskfile to device
4838 * @qc: command to issue to device
4840 * Prepare an ATA command to submission to device.
4841 * This includes mapping the data into a DMA-able
4842 * area, filling in the S/G table, and finally
4843 * writing the taskfile to hardware, starting the command.
4846 * spin_lock_irqsave(host lock)
4848 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4850 struct ata_port
*ap
= qc
->ap
;
4851 struct ata_link
*link
= qc
->dev
->link
;
4852 u8 prot
= qc
->tf
.protocol
;
4854 /* Make sure only one non-NCQ command is outstanding. The
4855 * check is skipped for old EH because it reuses active qc to
4856 * request ATAPI sense.
4858 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4860 if (ata_is_ncq(prot
)) {
4861 WARN_ON(link
->sactive
& (1 << qc
->tag
));
4864 ap
->nr_active_links
++;
4865 link
->sactive
|= 1 << qc
->tag
;
4867 WARN_ON(link
->sactive
);
4869 ap
->nr_active_links
++;
4870 link
->active_tag
= qc
->tag
;
4873 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4874 ap
->qc_active
|= 1 << qc
->tag
;
4876 /* We guarantee to LLDs that they will have at least one
4877 * non-zero sg if the command is a data command.
4879 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
4881 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4882 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4883 if (ata_sg_setup(qc
))
4886 /* if device is sleeping, schedule reset and abort the link */
4887 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4888 link
->eh_info
.action
|= ATA_EH_RESET
;
4889 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4890 ata_link_abort(link
);
4894 ap
->ops
->qc_prep(qc
);
4896 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4897 if (unlikely(qc
->err_mask
))
4902 qc
->err_mask
|= AC_ERR_SYSTEM
;
4904 ata_qc_complete(qc
);
4908 * sata_scr_valid - test whether SCRs are accessible
4909 * @link: ATA link to test SCR accessibility for
4911 * Test whether SCRs are accessible for @link.
4917 * 1 if SCRs are accessible, 0 otherwise.
4919 int sata_scr_valid(struct ata_link
*link
)
4921 struct ata_port
*ap
= link
->ap
;
4923 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
4927 * sata_scr_read - read SCR register of the specified port
4928 * @link: ATA link to read SCR for
4930 * @val: Place to store read value
4932 * Read SCR register @reg of @link into *@val. This function is
4933 * guaranteed to succeed if @link is ap->link, the cable type of
4934 * the port is SATA and the port implements ->scr_read.
4937 * None if @link is ap->link. Kernel thread context otherwise.
4940 * 0 on success, negative errno on failure.
4942 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
4944 if (ata_is_host_link(link
)) {
4945 struct ata_port
*ap
= link
->ap
;
4947 if (sata_scr_valid(link
))
4948 return ap
->ops
->scr_read(ap
, reg
, val
);
4952 return sata_pmp_scr_read(link
, reg
, val
);
4956 * sata_scr_write - write SCR register of the specified port
4957 * @link: ATA link to write SCR for
4958 * @reg: SCR to write
4959 * @val: value to write
4961 * Write @val to SCR register @reg of @link. This function is
4962 * guaranteed to succeed if @link is ap->link, the cable type of
4963 * the port is SATA and the port implements ->scr_read.
4966 * None if @link is ap->link. Kernel thread context otherwise.
4969 * 0 on success, negative errno on failure.
4971 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
4973 if (ata_is_host_link(link
)) {
4974 struct ata_port
*ap
= link
->ap
;
4976 if (sata_scr_valid(link
))
4977 return ap
->ops
->scr_write(ap
, reg
, val
);
4981 return sata_pmp_scr_write(link
, reg
, val
);
4985 * sata_scr_write_flush - write SCR register of the specified port and flush
4986 * @link: ATA link to write SCR for
4987 * @reg: SCR to write
4988 * @val: value to write
4990 * This function is identical to sata_scr_write() except that this
4991 * function performs flush after writing to the register.
4994 * None if @link is ap->link. Kernel thread context otherwise.
4997 * 0 on success, negative errno on failure.
4999 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5001 if (ata_is_host_link(link
)) {
5002 struct ata_port
*ap
= link
->ap
;
5005 if (sata_scr_valid(link
)) {
5006 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
5008 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
5014 return sata_pmp_scr_write(link
, reg
, val
);
5018 * ata_link_online - test whether the given link is online
5019 * @link: ATA link to test
5021 * Test whether @link is online. Note that this function returns
5022 * 0 if online status of @link cannot be obtained, so
5023 * ata_link_online(link) != !ata_link_offline(link).
5029 * 1 if the port online status is available and online.
5031 int ata_link_online(struct ata_link
*link
)
5035 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5036 (sstatus
& 0xf) == 0x3)
5042 * ata_link_offline - test whether the given link is offline
5043 * @link: ATA link to test
5045 * Test whether @link is offline. Note that this function
5046 * returns 0 if offline status of @link cannot be obtained, so
5047 * ata_link_online(link) != !ata_link_offline(link).
5053 * 1 if the port offline status is available and offline.
5055 int ata_link_offline(struct ata_link
*link
)
5059 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5060 (sstatus
& 0xf) != 0x3)
5066 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5067 unsigned int action
, unsigned int ehi_flags
,
5070 unsigned long flags
;
5073 for (i
= 0; i
< host
->n_ports
; i
++) {
5074 struct ata_port
*ap
= host
->ports
[i
];
5075 struct ata_link
*link
;
5077 /* Previous resume operation might still be in
5078 * progress. Wait for PM_PENDING to clear.
5080 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5081 ata_port_wait_eh(ap
);
5082 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5085 /* request PM ops to EH */
5086 spin_lock_irqsave(ap
->lock
, flags
);
5091 ap
->pm_result
= &rc
;
5094 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5095 __ata_port_for_each_link(link
, ap
) {
5096 link
->eh_info
.action
|= action
;
5097 link
->eh_info
.flags
|= ehi_flags
;
5100 ata_port_schedule_eh(ap
);
5102 spin_unlock_irqrestore(ap
->lock
, flags
);
5104 /* wait and check result */
5106 ata_port_wait_eh(ap
);
5107 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5117 * ata_host_suspend - suspend host
5118 * @host: host to suspend
5121 * Suspend @host. Actual operation is performed by EH. This
5122 * function requests EH to perform PM operations and waits for EH
5126 * Kernel thread context (may sleep).
5129 * 0 on success, -errno on failure.
5131 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5136 * disable link pm on all ports before requesting
5139 ata_lpm_enable(host
);
5141 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5143 host
->dev
->power
.power_state
= mesg
;
5148 * ata_host_resume - resume host
5149 * @host: host to resume
5151 * Resume @host. Actual operation is performed by EH. This
5152 * function requests EH to perform PM operations and returns.
5153 * Note that all resume operations are performed parallely.
5156 * Kernel thread context (may sleep).
5158 void ata_host_resume(struct ata_host
*host
)
5160 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
5161 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5162 host
->dev
->power
.power_state
= PMSG_ON
;
5164 /* reenable link pm */
5165 ata_lpm_disable(host
);
5170 * ata_port_start - Set port up for dma.
5171 * @ap: Port to initialize
5173 * Called just after data structures for each port are
5174 * initialized. Allocates space for PRD table.
5176 * May be used as the port_start() entry in ata_port_operations.
5179 * Inherited from caller.
5181 int ata_port_start(struct ata_port
*ap
)
5183 struct device
*dev
= ap
->dev
;
5185 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5194 * ata_dev_init - Initialize an ata_device structure
5195 * @dev: Device structure to initialize
5197 * Initialize @dev in preparation for probing.
5200 * Inherited from caller.
5202 void ata_dev_init(struct ata_device
*dev
)
5204 struct ata_link
*link
= dev
->link
;
5205 struct ata_port
*ap
= link
->ap
;
5206 unsigned long flags
;
5208 /* SATA spd limit is bound to the first device */
5209 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5212 /* High bits of dev->flags are used to record warm plug
5213 * requests which occur asynchronously. Synchronize using
5216 spin_lock_irqsave(ap
->lock
, flags
);
5217 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5219 spin_unlock_irqrestore(ap
->lock
, flags
);
5221 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5222 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5223 dev
->pio_mask
= UINT_MAX
;
5224 dev
->mwdma_mask
= UINT_MAX
;
5225 dev
->udma_mask
= UINT_MAX
;
5229 * ata_link_init - Initialize an ata_link structure
5230 * @ap: ATA port link is attached to
5231 * @link: Link structure to initialize
5232 * @pmp: Port multiplier port number
5237 * Kernel thread context (may sleep)
5239 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5243 /* clear everything except for devices */
5244 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
5248 link
->active_tag
= ATA_TAG_POISON
;
5249 link
->hw_sata_spd_limit
= UINT_MAX
;
5251 /* can't use iterator, ap isn't initialized yet */
5252 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5253 struct ata_device
*dev
= &link
->device
[i
];
5256 dev
->devno
= dev
- link
->device
;
5262 * sata_link_init_spd - Initialize link->sata_spd_limit
5263 * @link: Link to configure sata_spd_limit for
5265 * Initialize @link->[hw_]sata_spd_limit to the currently
5269 * Kernel thread context (may sleep).
5272 * 0 on success, -errno on failure.
5274 int sata_link_init_spd(struct ata_link
*link
)
5279 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5283 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5285 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5287 ata_force_link_limits(link
);
5289 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5295 * ata_port_alloc - allocate and initialize basic ATA port resources
5296 * @host: ATA host this allocated port belongs to
5298 * Allocate and initialize basic ATA port resources.
5301 * Allocate ATA port on success, NULL on failure.
5304 * Inherited from calling layer (may sleep).
5306 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5308 struct ata_port
*ap
;
5312 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5316 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5317 ap
->lock
= &host
->lock
;
5318 ap
->flags
= ATA_FLAG_DISABLED
;
5320 ap
->ctl
= ATA_DEVCTL_OBS
;
5322 ap
->dev
= host
->dev
;
5323 ap
->last_ctl
= 0xFF;
5325 #if defined(ATA_VERBOSE_DEBUG)
5326 /* turn on all debugging levels */
5327 ap
->msg_enable
= 0x00FF;
5328 #elif defined(ATA_DEBUG)
5329 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5331 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5334 #ifdef CONFIG_ATA_SFF
5335 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
5337 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5339 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5340 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5341 INIT_LIST_HEAD(&ap
->eh_done_q
);
5342 init_waitqueue_head(&ap
->eh_wait_q
);
5343 init_timer_deferrable(&ap
->fastdrain_timer
);
5344 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5345 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5347 ap
->cbl
= ATA_CBL_NONE
;
5349 ata_link_init(ap
, &ap
->link
, 0);
5352 ap
->stats
.unhandled_irq
= 1;
5353 ap
->stats
.idle_irq
= 1;
5358 static void ata_host_release(struct device
*gendev
, void *res
)
5360 struct ata_host
*host
= dev_get_drvdata(gendev
);
5363 for (i
= 0; i
< host
->n_ports
; i
++) {
5364 struct ata_port
*ap
= host
->ports
[i
];
5370 scsi_host_put(ap
->scsi_host
);
5372 kfree(ap
->pmp_link
);
5374 host
->ports
[i
] = NULL
;
5377 dev_set_drvdata(gendev
, NULL
);
5381 * ata_host_alloc - allocate and init basic ATA host resources
5382 * @dev: generic device this host is associated with
5383 * @max_ports: maximum number of ATA ports associated with this host
5385 * Allocate and initialize basic ATA host resources. LLD calls
5386 * this function to allocate a host, initializes it fully and
5387 * attaches it using ata_host_register().
5389 * @max_ports ports are allocated and host->n_ports is
5390 * initialized to @max_ports. The caller is allowed to decrease
5391 * host->n_ports before calling ata_host_register(). The unused
5392 * ports will be automatically freed on registration.
5395 * Allocate ATA host on success, NULL on failure.
5398 * Inherited from calling layer (may sleep).
5400 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5402 struct ata_host
*host
;
5408 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5411 /* alloc a container for our list of ATA ports (buses) */
5412 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5413 /* alloc a container for our list of ATA ports (buses) */
5414 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5418 devres_add(dev
, host
);
5419 dev_set_drvdata(dev
, host
);
5421 spin_lock_init(&host
->lock
);
5423 host
->n_ports
= max_ports
;
5425 /* allocate ports bound to this host */
5426 for (i
= 0; i
< max_ports
; i
++) {
5427 struct ata_port
*ap
;
5429 ap
= ata_port_alloc(host
);
5434 host
->ports
[i
] = ap
;
5437 devres_remove_group(dev
, NULL
);
5441 devres_release_group(dev
, NULL
);
5446 * ata_host_alloc_pinfo - alloc host and init with port_info array
5447 * @dev: generic device this host is associated with
5448 * @ppi: array of ATA port_info to initialize host with
5449 * @n_ports: number of ATA ports attached to this host
5451 * Allocate ATA host and initialize with info from @ppi. If NULL
5452 * terminated, @ppi may contain fewer entries than @n_ports. The
5453 * last entry will be used for the remaining ports.
5456 * Allocate ATA host on success, NULL on failure.
5459 * Inherited from calling layer (may sleep).
5461 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5462 const struct ata_port_info
* const * ppi
,
5465 const struct ata_port_info
*pi
;
5466 struct ata_host
*host
;
5469 host
= ata_host_alloc(dev
, n_ports
);
5473 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5474 struct ata_port
*ap
= host
->ports
[i
];
5479 ap
->pio_mask
= pi
->pio_mask
;
5480 ap
->mwdma_mask
= pi
->mwdma_mask
;
5481 ap
->udma_mask
= pi
->udma_mask
;
5482 ap
->flags
|= pi
->flags
;
5483 ap
->link
.flags
|= pi
->link_flags
;
5484 ap
->ops
= pi
->port_ops
;
5486 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5487 host
->ops
= pi
->port_ops
;
5493 static void ata_host_stop(struct device
*gendev
, void *res
)
5495 struct ata_host
*host
= dev_get_drvdata(gendev
);
5498 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5500 for (i
= 0; i
< host
->n_ports
; i
++) {
5501 struct ata_port
*ap
= host
->ports
[i
];
5503 if (ap
->ops
->port_stop
)
5504 ap
->ops
->port_stop(ap
);
5507 if (host
->ops
->host_stop
)
5508 host
->ops
->host_stop(host
);
5512 * ata_finalize_port_ops - finalize ata_port_operations
5513 * @ops: ata_port_operations to finalize
5515 * An ata_port_operations can inherit from another ops and that
5516 * ops can again inherit from another. This can go on as many
5517 * times as necessary as long as there is no loop in the
5518 * inheritance chain.
5520 * Ops tables are finalized when the host is started. NULL or
5521 * unspecified entries are inherited from the closet ancestor
5522 * which has the method and the entry is populated with it.
5523 * After finalization, the ops table directly points to all the
5524 * methods and ->inherits is no longer necessary and cleared.
5526 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5531 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5533 static DEFINE_SPINLOCK(lock
);
5534 const struct ata_port_operations
*cur
;
5535 void **begin
= (void **)ops
;
5536 void **end
= (void **)&ops
->inherits
;
5539 if (!ops
|| !ops
->inherits
)
5544 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5545 void **inherit
= (void **)cur
;
5547 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5552 for (pp
= begin
; pp
< end
; pp
++)
5556 ops
->inherits
= NULL
;
5562 * ata_host_start - start and freeze ports of an ATA host
5563 * @host: ATA host to start ports for
5565 * Start and then freeze ports of @host. Started status is
5566 * recorded in host->flags, so this function can be called
5567 * multiple times. Ports are guaranteed to get started only
5568 * once. If host->ops isn't initialized yet, its set to the
5569 * first non-dummy port ops.
5572 * Inherited from calling layer (may sleep).
5575 * 0 if all ports are started successfully, -errno otherwise.
5577 int ata_host_start(struct ata_host
*host
)
5580 void *start_dr
= NULL
;
5583 if (host
->flags
& ATA_HOST_STARTED
)
5586 ata_finalize_port_ops(host
->ops
);
5588 for (i
= 0; i
< host
->n_ports
; i
++) {
5589 struct ata_port
*ap
= host
->ports
[i
];
5591 ata_finalize_port_ops(ap
->ops
);
5593 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5594 host
->ops
= ap
->ops
;
5596 if (ap
->ops
->port_stop
)
5600 if (host
->ops
->host_stop
)
5604 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5609 for (i
= 0; i
< host
->n_ports
; i
++) {
5610 struct ata_port
*ap
= host
->ports
[i
];
5612 if (ap
->ops
->port_start
) {
5613 rc
= ap
->ops
->port_start(ap
);
5616 dev_printk(KERN_ERR
, host
->dev
,
5617 "failed to start port %d "
5618 "(errno=%d)\n", i
, rc
);
5622 ata_eh_freeze_port(ap
);
5626 devres_add(host
->dev
, start_dr
);
5627 host
->flags
|= ATA_HOST_STARTED
;
5632 struct ata_port
*ap
= host
->ports
[i
];
5634 if (ap
->ops
->port_stop
)
5635 ap
->ops
->port_stop(ap
);
5637 devres_free(start_dr
);
5642 * ata_sas_host_init - Initialize a host struct
5643 * @host: host to initialize
5644 * @dev: device host is attached to
5645 * @flags: host flags
5649 * PCI/etc. bus probe sem.
5652 /* KILLME - the only user left is ipr */
5653 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5654 unsigned long flags
, struct ata_port_operations
*ops
)
5656 spin_lock_init(&host
->lock
);
5658 host
->flags
= flags
;
5663 * ata_host_register - register initialized ATA host
5664 * @host: ATA host to register
5665 * @sht: template for SCSI host
5667 * Register initialized ATA host. @host is allocated using
5668 * ata_host_alloc() and fully initialized by LLD. This function
5669 * starts ports, registers @host with ATA and SCSI layers and
5670 * probe registered devices.
5673 * Inherited from calling layer (may sleep).
5676 * 0 on success, -errno otherwise.
5678 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5682 /* host must have been started */
5683 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5684 dev_printk(KERN_ERR
, host
->dev
,
5685 "BUG: trying to register unstarted host\n");
5690 /* Blow away unused ports. This happens when LLD can't
5691 * determine the exact number of ports to allocate at
5694 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5695 kfree(host
->ports
[i
]);
5697 /* give ports names and add SCSI hosts */
5698 for (i
= 0; i
< host
->n_ports
; i
++)
5699 host
->ports
[i
]->print_id
= ata_print_id
++;
5701 rc
= ata_scsi_add_hosts(host
, sht
);
5705 /* associate with ACPI nodes */
5706 ata_acpi_associate(host
);
5708 /* set cable, sata_spd_limit and report */
5709 for (i
= 0; i
< host
->n_ports
; i
++) {
5710 struct ata_port
*ap
= host
->ports
[i
];
5711 unsigned long xfer_mask
;
5713 /* set SATA cable type if still unset */
5714 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5715 ap
->cbl
= ATA_CBL_SATA
;
5717 /* init sata_spd_limit to the current value */
5718 sata_link_init_spd(&ap
->link
);
5720 /* print per-port info to dmesg */
5721 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5724 if (!ata_port_is_dummy(ap
)) {
5725 ata_port_printk(ap
, KERN_INFO
,
5726 "%cATA max %s %s\n",
5727 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5728 ata_mode_string(xfer_mask
),
5729 ap
->link
.eh_info
.desc
);
5730 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5732 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5735 /* perform each probe synchronously */
5736 DPRINTK("probe begin\n");
5737 for (i
= 0; i
< host
->n_ports
; i
++) {
5738 struct ata_port
*ap
= host
->ports
[i
];
5741 if (ap
->ops
->error_handler
) {
5742 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5743 unsigned long flags
;
5747 /* kick EH for boot probing */
5748 spin_lock_irqsave(ap
->lock
, flags
);
5750 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5751 ehi
->action
|= ATA_EH_RESET
| ATA_EH_LPM
;
5752 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5754 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5755 ap
->pflags
|= ATA_PFLAG_LOADING
;
5756 ata_port_schedule_eh(ap
);
5758 spin_unlock_irqrestore(ap
->lock
, flags
);
5760 /* wait for EH to finish */
5761 ata_port_wait_eh(ap
);
5763 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5764 rc
= ata_bus_probe(ap
);
5765 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5768 /* FIXME: do something useful here?
5769 * Current libata behavior will
5770 * tear down everything when
5771 * the module is removed
5772 * or the h/w is unplugged.
5778 /* probes are done, now scan each port's disk(s) */
5779 DPRINTK("host probe begin\n");
5780 for (i
= 0; i
< host
->n_ports
; i
++) {
5781 struct ata_port
*ap
= host
->ports
[i
];
5783 ata_scsi_scan_host(ap
, 1);
5790 * ata_host_activate - start host, request IRQ and register it
5791 * @host: target ATA host
5792 * @irq: IRQ to request
5793 * @irq_handler: irq_handler used when requesting IRQ
5794 * @irq_flags: irq_flags used when requesting IRQ
5795 * @sht: scsi_host_template to use when registering the host
5797 * After allocating an ATA host and initializing it, most libata
5798 * LLDs perform three steps to activate the host - start host,
5799 * request IRQ and register it. This helper takes necessasry
5800 * arguments and performs the three steps in one go.
5802 * An invalid IRQ skips the IRQ registration and expects the host to
5803 * have set polling mode on the port. In this case, @irq_handler
5807 * Inherited from calling layer (may sleep).
5810 * 0 on success, -errno otherwise.
5812 int ata_host_activate(struct ata_host
*host
, int irq
,
5813 irq_handler_t irq_handler
, unsigned long irq_flags
,
5814 struct scsi_host_template
*sht
)
5818 rc
= ata_host_start(host
);
5822 /* Special case for polling mode */
5824 WARN_ON(irq_handler
);
5825 return ata_host_register(host
, sht
);
5828 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5829 dev_driver_string(host
->dev
), host
);
5833 for (i
= 0; i
< host
->n_ports
; i
++)
5834 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5836 rc
= ata_host_register(host
, sht
);
5837 /* if failed, just free the IRQ and leave ports alone */
5839 devm_free_irq(host
->dev
, irq
, host
);
5845 * ata_port_detach - Detach ATA port in prepration of device removal
5846 * @ap: ATA port to be detached
5848 * Detach all ATA devices and the associated SCSI devices of @ap;
5849 * then, remove the associated SCSI host. @ap is guaranteed to
5850 * be quiescent on return from this function.
5853 * Kernel thread context (may sleep).
5855 static void ata_port_detach(struct ata_port
*ap
)
5857 unsigned long flags
;
5858 struct ata_link
*link
;
5859 struct ata_device
*dev
;
5861 if (!ap
->ops
->error_handler
)
5864 /* tell EH we're leaving & flush EH */
5865 spin_lock_irqsave(ap
->lock
, flags
);
5866 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5867 spin_unlock_irqrestore(ap
->lock
, flags
);
5869 ata_port_wait_eh(ap
);
5871 /* EH is now guaranteed to see UNLOADING - EH context belongs
5872 * to us. Restore SControl and disable all existing devices.
5874 __ata_port_for_each_link(link
, ap
) {
5875 sata_scr_write(link
, SCR_CONTROL
, link
->saved_scontrol
);
5876 ata_link_for_each_dev(dev
, link
)
5877 ata_dev_disable(dev
);
5880 /* Final freeze & EH. All in-flight commands are aborted. EH
5881 * will be skipped and retrials will be terminated with bad
5884 spin_lock_irqsave(ap
->lock
, flags
);
5885 ata_port_freeze(ap
); /* won't be thawed */
5886 spin_unlock_irqrestore(ap
->lock
, flags
);
5888 ata_port_wait_eh(ap
);
5889 cancel_rearming_delayed_work(&ap
->hotplug_task
);
5892 /* remove the associated SCSI host */
5893 scsi_remove_host(ap
->scsi_host
);
5897 * ata_host_detach - Detach all ports of an ATA host
5898 * @host: Host to detach
5900 * Detach all ports of @host.
5903 * Kernel thread context (may sleep).
5905 void ata_host_detach(struct ata_host
*host
)
5909 for (i
= 0; i
< host
->n_ports
; i
++)
5910 ata_port_detach(host
->ports
[i
]);
5912 /* the host is dead now, dissociate ACPI */
5913 ata_acpi_dissociate(host
);
5919 * ata_pci_remove_one - PCI layer callback for device removal
5920 * @pdev: PCI device that was removed
5922 * PCI layer indicates to libata via this hook that hot-unplug or
5923 * module unload event has occurred. Detach all ports. Resource
5924 * release is handled via devres.
5927 * Inherited from PCI layer (may sleep).
5929 void ata_pci_remove_one(struct pci_dev
*pdev
)
5931 struct device
*dev
= &pdev
->dev
;
5932 struct ata_host
*host
= dev_get_drvdata(dev
);
5934 ata_host_detach(host
);
5937 /* move to PCI subsystem */
5938 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5940 unsigned long tmp
= 0;
5942 switch (bits
->width
) {
5945 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5951 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5957 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5968 return (tmp
== bits
->val
) ? 1 : 0;
5972 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5974 pci_save_state(pdev
);
5975 pci_disable_device(pdev
);
5977 if (mesg
.event
& PM_EVENT_SLEEP
)
5978 pci_set_power_state(pdev
, PCI_D3hot
);
5981 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
5985 pci_set_power_state(pdev
, PCI_D0
);
5986 pci_restore_state(pdev
);
5988 rc
= pcim_enable_device(pdev
);
5990 dev_printk(KERN_ERR
, &pdev
->dev
,
5991 "failed to enable device after resume (%d)\n", rc
);
5995 pci_set_master(pdev
);
5999 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6001 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6004 rc
= ata_host_suspend(host
, mesg
);
6008 ata_pci_device_do_suspend(pdev
, mesg
);
6013 int ata_pci_device_resume(struct pci_dev
*pdev
)
6015 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6018 rc
= ata_pci_device_do_resume(pdev
);
6020 ata_host_resume(host
);
6023 #endif /* CONFIG_PM */
6025 #endif /* CONFIG_PCI */
6027 static int __init
ata_parse_force_one(char **cur
,
6028 struct ata_force_ent
*force_ent
,
6029 const char **reason
)
6031 /* FIXME: Currently, there's no way to tag init const data and
6032 * using __initdata causes build failure on some versions of
6033 * gcc. Once __initdataconst is implemented, add const to the
6034 * following structure.
6036 static struct ata_force_param force_tbl
[] __initdata
= {
6037 { "40c", .cbl
= ATA_CBL_PATA40
},
6038 { "80c", .cbl
= ATA_CBL_PATA80
},
6039 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6040 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6041 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6042 { "sata", .cbl
= ATA_CBL_SATA
},
6043 { "1.5Gbps", .spd_limit
= 1 },
6044 { "3.0Gbps", .spd_limit
= 2 },
6045 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6046 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6047 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6048 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6049 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6050 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6051 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6052 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6053 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6054 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6055 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6056 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6057 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6058 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6059 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6060 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6061 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6062 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6063 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6064 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6065 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6066 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6067 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6068 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6069 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6070 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6071 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6072 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6073 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6074 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6075 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6076 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6077 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6078 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6079 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6080 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6081 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6082 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6083 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6085 char *start
= *cur
, *p
= *cur
;
6086 char *id
, *val
, *endp
;
6087 const struct ata_force_param
*match_fp
= NULL
;
6088 int nr_matches
= 0, i
;
6090 /* find where this param ends and update *cur */
6091 while (*p
!= '\0' && *p
!= ',')
6102 p
= strchr(start
, ':');
6104 val
= strstrip(start
);
6109 id
= strstrip(start
);
6110 val
= strstrip(p
+ 1);
6113 p
= strchr(id
, '.');
6116 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6117 if (p
== endp
|| *endp
!= '\0') {
6118 *reason
= "invalid device";
6123 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6124 if (p
== endp
|| *endp
!= '\0') {
6125 *reason
= "invalid port/link";
6130 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6131 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6132 const struct ata_force_param
*fp
= &force_tbl
[i
];
6134 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6140 if (strcasecmp(val
, fp
->name
) == 0) {
6147 *reason
= "unknown value";
6150 if (nr_matches
> 1) {
6151 *reason
= "ambigious value";
6155 force_ent
->param
= *match_fp
;
6160 static void __init
ata_parse_force_param(void)
6162 int idx
= 0, size
= 1;
6163 int last_port
= -1, last_device
= -1;
6164 char *p
, *cur
, *next
;
6166 /* calculate maximum number of params and allocate force_tbl */
6167 for (p
= ata_force_param_buf
; *p
; p
++)
6171 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6172 if (!ata_force_tbl
) {
6173 printk(KERN_WARNING
"ata: failed to extend force table, "
6174 "libata.force ignored\n");
6178 /* parse and populate the table */
6179 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6180 const char *reason
= "";
6181 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6184 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6185 printk(KERN_WARNING
"ata: failed to parse force "
6186 "parameter \"%s\" (%s)\n",
6191 if (te
.port
== -1) {
6192 te
.port
= last_port
;
6193 te
.device
= last_device
;
6196 ata_force_tbl
[idx
++] = te
;
6198 last_port
= te
.port
;
6199 last_device
= te
.device
;
6202 ata_force_tbl_size
= idx
;
6205 static int __init
ata_init(void)
6207 ata_parse_force_param();
6209 ata_wq
= create_workqueue("ata");
6211 goto free_force_tbl
;
6213 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6217 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6221 destroy_workqueue(ata_wq
);
6223 kfree(ata_force_tbl
);
6227 static void __exit
ata_exit(void)
6229 kfree(ata_force_tbl
);
6230 destroy_workqueue(ata_wq
);
6231 destroy_workqueue(ata_aux_wq
);
6234 subsys_initcall(ata_init
);
6235 module_exit(ata_exit
);
6237 static unsigned long ratelimit_time
;
6238 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6240 int ata_ratelimit(void)
6243 unsigned long flags
;
6245 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6247 if (time_after(jiffies
, ratelimit_time
)) {
6249 ratelimit_time
= jiffies
+ (HZ
/5);
6253 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6259 * ata_wait_register - wait until register value changes
6260 * @reg: IO-mapped register
6261 * @mask: Mask to apply to read register value
6262 * @val: Wait condition
6263 * @interval: polling interval in milliseconds
6264 * @timeout: timeout in milliseconds
6266 * Waiting for some bits of register to change is a common
6267 * operation for ATA controllers. This function reads 32bit LE
6268 * IO-mapped register @reg and tests for the following condition.
6270 * (*@reg & mask) != val
6272 * If the condition is met, it returns; otherwise, the process is
6273 * repeated after @interval_msec until timeout.
6276 * Kernel thread context (may sleep)
6279 * The final register value.
6281 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6282 unsigned long interval
, unsigned long timeout
)
6284 unsigned long deadline
;
6287 tmp
= ioread32(reg
);
6289 /* Calculate timeout _after_ the first read to make sure
6290 * preceding writes reach the controller before starting to
6291 * eat away the timeout.
6293 deadline
= ata_deadline(jiffies
, timeout
);
6295 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6297 tmp
= ioread32(reg
);
6306 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6308 return AC_ERR_SYSTEM
;
6311 static void ata_dummy_error_handler(struct ata_port
*ap
)
6316 struct ata_port_operations ata_dummy_port_ops
= {
6317 .qc_prep
= ata_noop_qc_prep
,
6318 .qc_issue
= ata_dummy_qc_issue
,
6319 .error_handler
= ata_dummy_error_handler
,
6322 const struct ata_port_info ata_dummy_port_info
= {
6323 .port_ops
= &ata_dummy_port_ops
,
6327 * libata is essentially a library of internal helper functions for
6328 * low-level ATA host controller drivers. As such, the API/ABI is
6329 * likely to change as new drivers are added and updated.
6330 * Do not depend on ABI/API stability.
6332 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6333 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6334 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6335 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6336 EXPORT_SYMBOL_GPL(sata_port_ops
);
6337 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6338 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6339 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6340 EXPORT_SYMBOL_GPL(ata_host_init
);
6341 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6342 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6343 EXPORT_SYMBOL_GPL(ata_host_start
);
6344 EXPORT_SYMBOL_GPL(ata_host_register
);
6345 EXPORT_SYMBOL_GPL(ata_host_activate
);
6346 EXPORT_SYMBOL_GPL(ata_host_detach
);
6347 EXPORT_SYMBOL_GPL(ata_sg_init
);
6348 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6349 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6350 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6351 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6352 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6353 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6354 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6355 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6356 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6357 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6358 EXPORT_SYMBOL_GPL(ata_mode_string
);
6359 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6360 EXPORT_SYMBOL_GPL(ata_port_start
);
6361 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6362 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6363 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6364 EXPORT_SYMBOL_GPL(ata_port_probe
);
6365 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6366 EXPORT_SYMBOL_GPL(sata_set_spd
);
6367 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6368 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6369 EXPORT_SYMBOL_GPL(sata_link_resume
);
6370 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6371 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6372 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6373 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6374 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6375 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6376 EXPORT_SYMBOL_GPL(ata_port_disable
);
6377 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6378 EXPORT_SYMBOL_GPL(ata_wait_register
);
6379 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6380 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6381 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6382 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6383 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6384 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6385 EXPORT_SYMBOL_GPL(sata_scr_read
);
6386 EXPORT_SYMBOL_GPL(sata_scr_write
);
6387 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6388 EXPORT_SYMBOL_GPL(ata_link_online
);
6389 EXPORT_SYMBOL_GPL(ata_link_offline
);
6391 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6392 EXPORT_SYMBOL_GPL(ata_host_resume
);
6393 #endif /* CONFIG_PM */
6394 EXPORT_SYMBOL_GPL(ata_id_string
);
6395 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6396 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6397 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6399 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6400 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6401 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6402 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6403 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6406 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6407 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6409 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6410 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6411 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6412 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6413 #endif /* CONFIG_PM */
6414 #endif /* CONFIG_PCI */
6416 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6417 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6418 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6419 EXPORT_SYMBOL_GPL(ata_port_desc
);
6421 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6422 #endif /* CONFIG_PCI */
6423 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6424 EXPORT_SYMBOL_GPL(ata_link_abort
);
6425 EXPORT_SYMBOL_GPL(ata_port_abort
);
6426 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6427 EXPORT_SYMBOL_GPL(sata_async_notification
);
6428 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6429 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6430 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6431 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6432 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6433 EXPORT_SYMBOL_GPL(ata_do_eh
);
6434 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6436 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6437 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6438 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6439 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6440 EXPORT_SYMBOL_GPL(ata_cable_sata
);