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;
569 ata_dev_printk(dev
, KERN_WARNING
, "device reported "
570 "invalid CHS sector 0\n");
571 sect
= 1; /* oh well */
574 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
- 1;
581 * ata_build_rw_tf - Build ATA taskfile for given read/write request
582 * @tf: Target ATA taskfile
583 * @dev: ATA device @tf belongs to
584 * @block: Block address
585 * @n_block: Number of blocks
586 * @tf_flags: RW/FUA etc...
592 * Build ATA taskfile @tf for read/write request described by
593 * @block, @n_block, @tf_flags and @tag on @dev.
597 * 0 on success, -ERANGE if the request is too large for @dev,
598 * -EINVAL if the request is invalid.
600 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
601 u64 block
, u32 n_block
, unsigned int tf_flags
,
604 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
605 tf
->flags
|= tf_flags
;
607 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
609 if (!lba_48_ok(block
, n_block
))
612 tf
->protocol
= ATA_PROT_NCQ
;
613 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
615 if (tf
->flags
& ATA_TFLAG_WRITE
)
616 tf
->command
= ATA_CMD_FPDMA_WRITE
;
618 tf
->command
= ATA_CMD_FPDMA_READ
;
620 tf
->nsect
= tag
<< 3;
621 tf
->hob_feature
= (n_block
>> 8) & 0xff;
622 tf
->feature
= n_block
& 0xff;
624 tf
->hob_lbah
= (block
>> 40) & 0xff;
625 tf
->hob_lbam
= (block
>> 32) & 0xff;
626 tf
->hob_lbal
= (block
>> 24) & 0xff;
627 tf
->lbah
= (block
>> 16) & 0xff;
628 tf
->lbam
= (block
>> 8) & 0xff;
629 tf
->lbal
= block
& 0xff;
632 if (tf
->flags
& ATA_TFLAG_FUA
)
633 tf
->device
|= 1 << 7;
634 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
635 tf
->flags
|= ATA_TFLAG_LBA
;
637 if (lba_28_ok(block
, n_block
)) {
639 tf
->device
|= (block
>> 24) & 0xf;
640 } else if (lba_48_ok(block
, n_block
)) {
641 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
645 tf
->flags
|= ATA_TFLAG_LBA48
;
647 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
649 tf
->hob_lbah
= (block
>> 40) & 0xff;
650 tf
->hob_lbam
= (block
>> 32) & 0xff;
651 tf
->hob_lbal
= (block
>> 24) & 0xff;
653 /* request too large even for LBA48 */
656 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
659 tf
->nsect
= n_block
& 0xff;
661 tf
->lbah
= (block
>> 16) & 0xff;
662 tf
->lbam
= (block
>> 8) & 0xff;
663 tf
->lbal
= block
& 0xff;
665 tf
->device
|= ATA_LBA
;
668 u32 sect
, head
, cyl
, track
;
670 /* The request -may- be too large for CHS addressing. */
671 if (!lba_28_ok(block
, n_block
))
674 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
677 /* Convert LBA to CHS */
678 track
= (u32
)block
/ dev
->sectors
;
679 cyl
= track
/ dev
->heads
;
680 head
= track
% dev
->heads
;
681 sect
= (u32
)block
% dev
->sectors
+ 1;
683 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
684 (u32
)block
, track
, cyl
, head
, sect
);
686 /* Check whether the converted CHS can fit.
690 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
693 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
704 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
705 * @pio_mask: pio_mask
706 * @mwdma_mask: mwdma_mask
707 * @udma_mask: udma_mask
709 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
710 * unsigned int xfer_mask.
718 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
719 unsigned long mwdma_mask
,
720 unsigned long udma_mask
)
722 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
723 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
724 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
728 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
729 * @xfer_mask: xfer_mask to unpack
730 * @pio_mask: resulting pio_mask
731 * @mwdma_mask: resulting mwdma_mask
732 * @udma_mask: resulting udma_mask
734 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
735 * Any NULL distination masks will be ignored.
737 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
738 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
741 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
743 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
745 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
748 static const struct ata_xfer_ent
{
752 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
753 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
754 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
759 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
760 * @xfer_mask: xfer_mask of interest
762 * Return matching XFER_* value for @xfer_mask. Only the highest
763 * bit of @xfer_mask is considered.
769 * Matching XFER_* value, 0xff if no match found.
771 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
773 int highbit
= fls(xfer_mask
) - 1;
774 const struct ata_xfer_ent
*ent
;
776 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
777 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
778 return ent
->base
+ highbit
- ent
->shift
;
783 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
784 * @xfer_mode: XFER_* of interest
786 * Return matching xfer_mask for @xfer_mode.
792 * Matching xfer_mask, 0 if no match found.
794 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
796 const struct ata_xfer_ent
*ent
;
798 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
799 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
800 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
801 & ~((1 << ent
->shift
) - 1);
806 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
807 * @xfer_mode: XFER_* of interest
809 * Return matching xfer_shift for @xfer_mode.
815 * Matching xfer_shift, -1 if no match found.
817 int ata_xfer_mode2shift(unsigned long xfer_mode
)
819 const struct ata_xfer_ent
*ent
;
821 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
822 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
828 * ata_mode_string - convert xfer_mask to string
829 * @xfer_mask: mask of bits supported; only highest bit counts.
831 * Determine string which represents the highest speed
832 * (highest bit in @modemask).
838 * Constant C string representing highest speed listed in
839 * @mode_mask, or the constant C string "<n/a>".
841 const char *ata_mode_string(unsigned long xfer_mask
)
843 static const char * const xfer_mode_str
[] = {
867 highbit
= fls(xfer_mask
) - 1;
868 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
869 return xfer_mode_str
[highbit
];
873 static const char *sata_spd_string(unsigned int spd
)
875 static const char * const spd_str
[] = {
880 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
882 return spd_str
[spd
- 1];
885 void ata_dev_disable(struct ata_device
*dev
)
887 if (ata_dev_enabled(dev
)) {
888 if (ata_msg_drv(dev
->link
->ap
))
889 ata_dev_printk(dev
, KERN_WARNING
, "disabled\n");
890 ata_acpi_on_disable(dev
);
891 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
|
897 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
899 struct ata_link
*link
= dev
->link
;
900 struct ata_port
*ap
= link
->ap
;
902 unsigned int err_mask
;
906 * disallow DIPM for drivers which haven't set
907 * ATA_FLAG_IPM. This is because when DIPM is enabled,
908 * phy ready will be set in the interrupt status on
909 * state changes, which will cause some drivers to
910 * think there are errors - additionally drivers will
911 * need to disable hot plug.
913 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
914 ap
->pm_policy
= NOT_AVAILABLE
;
919 * For DIPM, we will only enable it for the
922 * Why? Because Disks are too stupid to know that
923 * If the host rejects a request to go to SLUMBER
924 * they should retry at PARTIAL, and instead it
925 * just would give up. So, for medium_power to
926 * work at all, we need to only allow HIPM.
928 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
934 /* no restrictions on IPM transitions */
935 scontrol
&= ~(0x3 << 8);
936 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
941 if (dev
->flags
& ATA_DFLAG_DIPM
)
942 err_mask
= ata_dev_set_feature(dev
,
943 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
946 /* allow IPM to PARTIAL */
947 scontrol
&= ~(0x1 << 8);
948 scontrol
|= (0x2 << 8);
949 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
954 * we don't have to disable DIPM since IPM flags
955 * disallow transitions to SLUMBER, which effectively
956 * disable DIPM if it does not support PARTIAL
960 case MAX_PERFORMANCE
:
961 /* disable all IPM transitions */
962 scontrol
|= (0x3 << 8);
963 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
968 * we don't have to disable DIPM since IPM flags
969 * disallow all transitions which effectively
970 * disable DIPM anyway.
975 /* FIXME: handle SET FEATURES failure */
982 * ata_dev_enable_pm - enable SATA interface power management
983 * @dev: device to enable power management
984 * @policy: the link power management policy
986 * Enable SATA Interface power management. This will enable
987 * Device Interface Power Management (DIPM) for min_power
988 * policy, and then call driver specific callbacks for
989 * enabling Host Initiated Power management.
992 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
994 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
997 struct ata_port
*ap
= dev
->link
->ap
;
999 /* set HIPM first, then DIPM */
1000 if (ap
->ops
->enable_pm
)
1001 rc
= ap
->ops
->enable_pm(ap
, policy
);
1004 rc
= ata_dev_set_dipm(dev
, policy
);
1008 ap
->pm_policy
= MAX_PERFORMANCE
;
1010 ap
->pm_policy
= policy
;
1011 return /* rc */; /* hopefully we can use 'rc' eventually */
1016 * ata_dev_disable_pm - disable SATA interface power management
1017 * @dev: device to disable power management
1019 * Disable SATA Interface power management. This will disable
1020 * Device Interface Power Management (DIPM) without changing
1021 * policy, call driver specific callbacks for disabling Host
1022 * Initiated Power management.
1027 static void ata_dev_disable_pm(struct ata_device
*dev
)
1029 struct ata_port
*ap
= dev
->link
->ap
;
1031 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1032 if (ap
->ops
->disable_pm
)
1033 ap
->ops
->disable_pm(ap
);
1035 #endif /* CONFIG_PM */
1037 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1039 ap
->pm_policy
= policy
;
1040 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1041 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1042 ata_port_schedule_eh(ap
);
1046 static void ata_lpm_enable(struct ata_host
*host
)
1048 struct ata_link
*link
;
1049 struct ata_port
*ap
;
1050 struct ata_device
*dev
;
1053 for (i
= 0; i
< host
->n_ports
; i
++) {
1054 ap
= host
->ports
[i
];
1055 ata_port_for_each_link(link
, ap
) {
1056 ata_link_for_each_dev(dev
, link
)
1057 ata_dev_disable_pm(dev
);
1062 static void ata_lpm_disable(struct ata_host
*host
)
1066 for (i
= 0; i
< host
->n_ports
; i
++) {
1067 struct ata_port
*ap
= host
->ports
[i
];
1068 ata_lpm_schedule(ap
, ap
->pm_policy
);
1071 #endif /* CONFIG_PM */
1074 * ata_dev_classify - determine device type based on ATA-spec signature
1075 * @tf: ATA taskfile register set for device to be identified
1077 * Determine from taskfile register contents whether a device is
1078 * ATA or ATAPI, as per "Signature and persistence" section
1079 * of ATA/PI spec (volume 1, sect 5.14).
1085 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1086 * %ATA_DEV_UNKNOWN the event of failure.
1088 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1090 /* Apple's open source Darwin code hints that some devices only
1091 * put a proper signature into the LBA mid/high registers,
1092 * So, we only check those. It's sufficient for uniqueness.
1094 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1095 * signatures for ATA and ATAPI devices attached on SerialATA,
1096 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1097 * spec has never mentioned about using different signatures
1098 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1099 * Multiplier specification began to use 0x69/0x96 to identify
1100 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1101 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1102 * 0x69/0x96 shortly and described them as reserved for
1105 * We follow the current spec and consider that 0x69/0x96
1106 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1108 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1109 DPRINTK("found ATA device by sig\n");
1113 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1114 DPRINTK("found ATAPI device by sig\n");
1115 return ATA_DEV_ATAPI
;
1118 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1119 DPRINTK("found PMP device by sig\n");
1123 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1124 printk(KERN_INFO
"ata: SEMB device ignored\n");
1125 return ATA_DEV_SEMB_UNSUP
; /* not yet */
1128 DPRINTK("unknown device\n");
1129 return ATA_DEV_UNKNOWN
;
1133 * ata_id_string - Convert IDENTIFY DEVICE page into string
1134 * @id: IDENTIFY DEVICE results we will examine
1135 * @s: string into which data is output
1136 * @ofs: offset into identify device page
1137 * @len: length of string to return. must be an even number.
1139 * The strings in the IDENTIFY DEVICE page are broken up into
1140 * 16-bit chunks. Run through the string, and output each
1141 * 8-bit chunk linearly, regardless of platform.
1147 void ata_id_string(const u16
*id
, unsigned char *s
,
1148 unsigned int ofs
, unsigned int len
)
1169 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1170 * @id: IDENTIFY DEVICE results we will examine
1171 * @s: string into which data is output
1172 * @ofs: offset into identify device page
1173 * @len: length of string to return. must be an odd number.
1175 * This function is identical to ata_id_string except that it
1176 * trims trailing spaces and terminates the resulting string with
1177 * null. @len must be actual maximum length (even number) + 1.
1182 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1183 unsigned int ofs
, unsigned int len
)
1187 ata_id_string(id
, s
, ofs
, len
- 1);
1189 p
= s
+ strnlen(s
, len
- 1);
1190 while (p
> s
&& p
[-1] == ' ')
1195 static u64
ata_id_n_sectors(const u16
*id
)
1197 if (ata_id_has_lba(id
)) {
1198 if (ata_id_has_lba48(id
))
1199 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1201 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1203 if (ata_id_current_chs_valid(id
))
1204 return id
[ATA_ID_CUR_CYLS
] * id
[ATA_ID_CUR_HEADS
] *
1205 id
[ATA_ID_CUR_SECTORS
];
1207 return id
[ATA_ID_CYLS
] * id
[ATA_ID_HEADS
] *
1212 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1216 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1217 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1218 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1219 sectors
|= (tf
->lbah
& 0xff) << 16;
1220 sectors
|= (tf
->lbam
& 0xff) << 8;
1221 sectors
|= (tf
->lbal
& 0xff);
1226 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1230 sectors
|= (tf
->device
& 0x0f) << 24;
1231 sectors
|= (tf
->lbah
& 0xff) << 16;
1232 sectors
|= (tf
->lbam
& 0xff) << 8;
1233 sectors
|= (tf
->lbal
& 0xff);
1239 * ata_read_native_max_address - Read native max address
1240 * @dev: target device
1241 * @max_sectors: out parameter for the result native max address
1243 * Perform an LBA48 or LBA28 native size query upon the device in
1247 * 0 on success, -EACCES if command is aborted by the drive.
1248 * -EIO on other errors.
1250 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1252 unsigned int err_mask
;
1253 struct ata_taskfile tf
;
1254 int lba48
= ata_id_has_lba48(dev
->id
);
1256 ata_tf_init(dev
, &tf
);
1258 /* always clear all address registers */
1259 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1262 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1263 tf
.flags
|= ATA_TFLAG_LBA48
;
1265 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1267 tf
.protocol
|= ATA_PROT_NODATA
;
1268 tf
.device
|= ATA_LBA
;
1270 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1272 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1273 "max address (err_mask=0x%x)\n", err_mask
);
1274 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1280 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1282 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1283 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1289 * ata_set_max_sectors - Set max sectors
1290 * @dev: target device
1291 * @new_sectors: new max sectors value to set for the device
1293 * Set max sectors of @dev to @new_sectors.
1296 * 0 on success, -EACCES if command is aborted or denied (due to
1297 * previous non-volatile SET_MAX) by the drive. -EIO on other
1300 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1302 unsigned int err_mask
;
1303 struct ata_taskfile tf
;
1304 int lba48
= ata_id_has_lba48(dev
->id
);
1308 ata_tf_init(dev
, &tf
);
1310 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1313 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1314 tf
.flags
|= ATA_TFLAG_LBA48
;
1316 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1317 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1318 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1320 tf
.command
= ATA_CMD_SET_MAX
;
1322 tf
.device
|= (new_sectors
>> 24) & 0xf;
1325 tf
.protocol
|= ATA_PROT_NODATA
;
1326 tf
.device
|= ATA_LBA
;
1328 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1329 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1330 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1332 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1334 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1335 "max address (err_mask=0x%x)\n", err_mask
);
1336 if (err_mask
== AC_ERR_DEV
&&
1337 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1346 * ata_hpa_resize - Resize a device with an HPA set
1347 * @dev: Device to resize
1349 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1350 * it if required to the full size of the media. The caller must check
1351 * the drive has the HPA feature set enabled.
1354 * 0 on success, -errno on failure.
1356 static int ata_hpa_resize(struct ata_device
*dev
)
1358 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1359 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1360 u64 sectors
= ata_id_n_sectors(dev
->id
);
1364 /* do we need to do it? */
1365 if (dev
->class != ATA_DEV_ATA
||
1366 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1367 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1370 /* read native max address */
1371 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1373 /* If device aborted the command or HPA isn't going to
1374 * be unlocked, skip HPA resizing.
1376 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1377 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1378 "broken, skipping HPA handling\n");
1379 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1381 /* we can continue if device aborted the command */
1389 /* nothing to do? */
1390 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1391 if (!print_info
|| native_sectors
== sectors
)
1394 if (native_sectors
> sectors
)
1395 ata_dev_printk(dev
, KERN_INFO
,
1396 "HPA detected: current %llu, native %llu\n",
1397 (unsigned long long)sectors
,
1398 (unsigned long long)native_sectors
);
1399 else if (native_sectors
< sectors
)
1400 ata_dev_printk(dev
, KERN_WARNING
,
1401 "native sectors (%llu) is smaller than "
1403 (unsigned long long)native_sectors
,
1404 (unsigned long long)sectors
);
1408 /* let's unlock HPA */
1409 rc
= ata_set_max_sectors(dev
, native_sectors
);
1410 if (rc
== -EACCES
) {
1411 /* if device aborted the command, skip HPA resizing */
1412 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1413 "(%llu -> %llu), skipping HPA handling\n",
1414 (unsigned long long)sectors
,
1415 (unsigned long long)native_sectors
);
1416 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1421 /* re-read IDENTIFY data */
1422 rc
= ata_dev_reread_id(dev
, 0);
1424 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1425 "data after HPA resizing\n");
1430 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1431 ata_dev_printk(dev
, KERN_INFO
,
1432 "HPA unlocked: %llu -> %llu, native %llu\n",
1433 (unsigned long long)sectors
,
1434 (unsigned long long)new_sectors
,
1435 (unsigned long long)native_sectors
);
1442 * ata_dump_id - IDENTIFY DEVICE info debugging output
1443 * @id: IDENTIFY DEVICE page to dump
1445 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1452 static inline void ata_dump_id(const u16
*id
)
1454 DPRINTK("49==0x%04x "
1464 DPRINTK("80==0x%04x "
1474 DPRINTK("88==0x%04x "
1481 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1482 * @id: IDENTIFY data to compute xfer mask from
1484 * Compute the xfermask for this device. This is not as trivial
1485 * as it seems if we must consider early devices correctly.
1487 * FIXME: pre IDE drive timing (do we care ?).
1495 unsigned long ata_id_xfermask(const u16
*id
)
1497 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1499 /* Usual case. Word 53 indicates word 64 is valid */
1500 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1501 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1505 /* If word 64 isn't valid then Word 51 high byte holds
1506 * the PIO timing number for the maximum. Turn it into
1509 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1510 if (mode
< 5) /* Valid PIO range */
1511 pio_mask
= (2 << mode
) - 1;
1515 /* But wait.. there's more. Design your standards by
1516 * committee and you too can get a free iordy field to
1517 * process. However its the speeds not the modes that
1518 * are supported... Note drivers using the timing API
1519 * will get this right anyway
1523 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1525 if (ata_id_is_cfa(id
)) {
1527 * Process compact flash extended modes
1529 int pio
= id
[163] & 0x7;
1530 int dma
= (id
[163] >> 3) & 7;
1533 pio_mask
|= (1 << 5);
1535 pio_mask
|= (1 << 6);
1537 mwdma_mask
|= (1 << 3);
1539 mwdma_mask
|= (1 << 4);
1543 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1544 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1546 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1550 * ata_pio_queue_task - Queue port_task
1551 * @ap: The ata_port to queue port_task for
1552 * @fn: workqueue function to be scheduled
1553 * @data: data for @fn to use
1554 * @delay: delay time in msecs for workqueue function
1556 * Schedule @fn(@data) for execution after @delay jiffies using
1557 * port_task. There is one port_task per port and it's the
1558 * user(low level driver)'s responsibility to make sure that only
1559 * one task is active at any given time.
1561 * libata core layer takes care of synchronization between
1562 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1566 * Inherited from caller.
1568 void ata_pio_queue_task(struct ata_port
*ap
, void *data
, unsigned long delay
)
1570 ap
->port_task_data
= data
;
1572 /* may fail if ata_port_flush_task() in progress */
1573 queue_delayed_work(ata_wq
, &ap
->port_task
, msecs_to_jiffies(delay
));
1577 * ata_port_flush_task - Flush port_task
1578 * @ap: The ata_port to flush port_task for
1580 * After this function completes, port_task is guranteed not to
1581 * be running or scheduled.
1584 * Kernel thread context (may sleep)
1586 void ata_port_flush_task(struct ata_port
*ap
)
1590 cancel_rearming_delayed_work(&ap
->port_task
);
1592 if (ata_msg_ctl(ap
))
1593 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1596 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1598 struct completion
*waiting
= qc
->private_data
;
1604 * ata_exec_internal_sg - execute libata internal command
1605 * @dev: Device to which the command is sent
1606 * @tf: Taskfile registers for the command and the result
1607 * @cdb: CDB for packet command
1608 * @dma_dir: Data tranfer direction of the command
1609 * @sgl: sg list for the data buffer of the command
1610 * @n_elem: Number of sg entries
1611 * @timeout: Timeout in msecs (0 for default)
1613 * Executes libata internal command with timeout. @tf contains
1614 * command on entry and result on return. Timeout and error
1615 * conditions are reported via return value. No recovery action
1616 * is taken after a command times out. It's caller's duty to
1617 * clean up after timeout.
1620 * None. Should be called with kernel context, might sleep.
1623 * Zero on success, AC_ERR_* mask on failure
1625 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1626 struct ata_taskfile
*tf
, const u8
*cdb
,
1627 int dma_dir
, struct scatterlist
*sgl
,
1628 unsigned int n_elem
, unsigned long timeout
)
1630 struct ata_link
*link
= dev
->link
;
1631 struct ata_port
*ap
= link
->ap
;
1632 u8 command
= tf
->command
;
1633 int auto_timeout
= 0;
1634 struct ata_queued_cmd
*qc
;
1635 unsigned int tag
, preempted_tag
;
1636 u32 preempted_sactive
, preempted_qc_active
;
1637 int preempted_nr_active_links
;
1638 DECLARE_COMPLETION_ONSTACK(wait
);
1639 unsigned long flags
;
1640 unsigned int err_mask
;
1643 spin_lock_irqsave(ap
->lock
, flags
);
1645 /* no internal command while frozen */
1646 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1647 spin_unlock_irqrestore(ap
->lock
, flags
);
1648 return AC_ERR_SYSTEM
;
1651 /* initialize internal qc */
1653 /* XXX: Tag 0 is used for drivers with legacy EH as some
1654 * drivers choke if any other tag is given. This breaks
1655 * ata_tag_internal() test for those drivers. Don't use new
1656 * EH stuff without converting to it.
1658 if (ap
->ops
->error_handler
)
1659 tag
= ATA_TAG_INTERNAL
;
1663 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1665 qc
= __ata_qc_from_tag(ap
, tag
);
1673 preempted_tag
= link
->active_tag
;
1674 preempted_sactive
= link
->sactive
;
1675 preempted_qc_active
= ap
->qc_active
;
1676 preempted_nr_active_links
= ap
->nr_active_links
;
1677 link
->active_tag
= ATA_TAG_POISON
;
1680 ap
->nr_active_links
= 0;
1682 /* prepare & issue qc */
1685 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1686 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1687 qc
->dma_dir
= dma_dir
;
1688 if (dma_dir
!= DMA_NONE
) {
1689 unsigned int i
, buflen
= 0;
1690 struct scatterlist
*sg
;
1692 for_each_sg(sgl
, sg
, n_elem
, i
)
1693 buflen
+= sg
->length
;
1695 ata_sg_init(qc
, sgl
, n_elem
);
1696 qc
->nbytes
= buflen
;
1699 qc
->private_data
= &wait
;
1700 qc
->complete_fn
= ata_qc_complete_internal
;
1704 spin_unlock_irqrestore(ap
->lock
, flags
);
1707 if (ata_probe_timeout
)
1708 timeout
= ata_probe_timeout
* 1000;
1710 timeout
= ata_internal_cmd_timeout(dev
, command
);
1715 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1717 ata_port_flush_task(ap
);
1720 spin_lock_irqsave(ap
->lock
, flags
);
1722 /* We're racing with irq here. If we lose, the
1723 * following test prevents us from completing the qc
1724 * twice. If we win, the port is frozen and will be
1725 * cleaned up by ->post_internal_cmd().
1727 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1728 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1730 if (ap
->ops
->error_handler
)
1731 ata_port_freeze(ap
);
1733 ata_qc_complete(qc
);
1735 if (ata_msg_warn(ap
))
1736 ata_dev_printk(dev
, KERN_WARNING
,
1737 "qc timeout (cmd 0x%x)\n", command
);
1740 spin_unlock_irqrestore(ap
->lock
, flags
);
1743 /* do post_internal_cmd */
1744 if (ap
->ops
->post_internal_cmd
)
1745 ap
->ops
->post_internal_cmd(qc
);
1747 /* perform minimal error analysis */
1748 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1749 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1750 qc
->err_mask
|= AC_ERR_DEV
;
1753 qc
->err_mask
|= AC_ERR_OTHER
;
1755 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1756 qc
->err_mask
&= ~AC_ERR_OTHER
;
1760 spin_lock_irqsave(ap
->lock
, flags
);
1762 *tf
= qc
->result_tf
;
1763 err_mask
= qc
->err_mask
;
1766 link
->active_tag
= preempted_tag
;
1767 link
->sactive
= preempted_sactive
;
1768 ap
->qc_active
= preempted_qc_active
;
1769 ap
->nr_active_links
= preempted_nr_active_links
;
1771 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1772 * Until those drivers are fixed, we detect the condition
1773 * here, fail the command with AC_ERR_SYSTEM and reenable the
1776 * Note that this doesn't change any behavior as internal
1777 * command failure results in disabling the device in the
1778 * higher layer for LLDDs without new reset/EH callbacks.
1780 * Kill the following code as soon as those drivers are fixed.
1782 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1783 err_mask
|= AC_ERR_SYSTEM
;
1787 spin_unlock_irqrestore(ap
->lock
, flags
);
1789 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1790 ata_internal_cmd_timed_out(dev
, command
);
1796 * ata_exec_internal - execute libata internal command
1797 * @dev: Device to which the command is sent
1798 * @tf: Taskfile registers for the command and the result
1799 * @cdb: CDB for packet command
1800 * @dma_dir: Data tranfer direction of the command
1801 * @buf: Data buffer of the command
1802 * @buflen: Length of data buffer
1803 * @timeout: Timeout in msecs (0 for default)
1805 * Wrapper around ata_exec_internal_sg() which takes simple
1806 * buffer instead of sg list.
1809 * None. Should be called with kernel context, might sleep.
1812 * Zero on success, AC_ERR_* mask on failure
1814 unsigned ata_exec_internal(struct ata_device
*dev
,
1815 struct ata_taskfile
*tf
, const u8
*cdb
,
1816 int dma_dir
, void *buf
, unsigned int buflen
,
1817 unsigned long timeout
)
1819 struct scatterlist
*psg
= NULL
, sg
;
1820 unsigned int n_elem
= 0;
1822 if (dma_dir
!= DMA_NONE
) {
1824 sg_init_one(&sg
, buf
, buflen
);
1829 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1834 * ata_do_simple_cmd - execute simple internal command
1835 * @dev: Device to which the command is sent
1836 * @cmd: Opcode to execute
1838 * Execute a 'simple' command, that only consists of the opcode
1839 * 'cmd' itself, without filling any other registers
1842 * Kernel thread context (may sleep).
1845 * Zero on success, AC_ERR_* mask on failure
1847 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1849 struct ata_taskfile tf
;
1851 ata_tf_init(dev
, &tf
);
1854 tf
.flags
|= ATA_TFLAG_DEVICE
;
1855 tf
.protocol
= ATA_PROT_NODATA
;
1857 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1861 * ata_pio_need_iordy - check if iordy needed
1864 * Check if the current speed of the device requires IORDY. Used
1865 * by various controllers for chip configuration.
1868 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1870 /* Controller doesn't support IORDY. Probably a pointless check
1871 as the caller should know this */
1872 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1874 /* PIO3 and higher it is mandatory */
1875 if (adev
->pio_mode
> XFER_PIO_2
)
1877 /* We turn it on when possible */
1878 if (ata_id_has_iordy(adev
->id
))
1884 * ata_pio_mask_no_iordy - Return the non IORDY mask
1887 * Compute the highest mode possible if we are not using iordy. Return
1888 * -1 if no iordy mode is available.
1891 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1893 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1894 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1895 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1896 /* Is the speed faster than the drive allows non IORDY ? */
1898 /* This is cycle times not frequency - watch the logic! */
1899 if (pio
> 240) /* PIO2 is 240nS per cycle */
1900 return 3 << ATA_SHIFT_PIO
;
1901 return 7 << ATA_SHIFT_PIO
;
1904 return 3 << ATA_SHIFT_PIO
;
1908 * ata_do_dev_read_id - default ID read method
1910 * @tf: proposed taskfile
1913 * Issue the identify taskfile and hand back the buffer containing
1914 * identify data. For some RAID controllers and for pre ATA devices
1915 * this function is wrapped or replaced by the driver
1917 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
1918 struct ata_taskfile
*tf
, u16
*id
)
1920 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
1921 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1925 * ata_dev_read_id - Read ID data from the specified device
1926 * @dev: target device
1927 * @p_class: pointer to class of the target device (may be changed)
1928 * @flags: ATA_READID_* flags
1929 * @id: buffer to read IDENTIFY data into
1931 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1932 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1933 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1934 * for pre-ATA4 drives.
1936 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1937 * now we abort if we hit that case.
1940 * Kernel thread context (may sleep)
1943 * 0 on success, -errno otherwise.
1945 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1946 unsigned int flags
, u16
*id
)
1948 struct ata_port
*ap
= dev
->link
->ap
;
1949 unsigned int class = *p_class
;
1950 struct ata_taskfile tf
;
1951 unsigned int err_mask
= 0;
1953 int may_fallback
= 1, tried_spinup
= 0;
1956 if (ata_msg_ctl(ap
))
1957 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
1960 ata_tf_init(dev
, &tf
);
1964 tf
.command
= ATA_CMD_ID_ATA
;
1967 tf
.command
= ATA_CMD_ID_ATAPI
;
1971 reason
= "unsupported class";
1975 tf
.protocol
= ATA_PROT_PIO
;
1977 /* Some devices choke if TF registers contain garbage. Make
1978 * sure those are properly initialized.
1980 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1982 /* Device presence detection is unreliable on some
1983 * controllers. Always poll IDENTIFY if available.
1985 tf
.flags
|= ATA_TFLAG_POLLING
;
1987 if (ap
->ops
->read_id
)
1988 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
1990 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
1993 if (err_mask
& AC_ERR_NODEV_HINT
) {
1994 ata_dev_printk(dev
, KERN_DEBUG
,
1995 "NODEV after polling detection\n");
1999 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
2000 /* Device or controller might have reported
2001 * the wrong device class. Give a shot at the
2002 * other IDENTIFY if the current one is
2003 * aborted by the device.
2008 if (class == ATA_DEV_ATA
)
2009 class = ATA_DEV_ATAPI
;
2011 class = ATA_DEV_ATA
;
2015 /* Control reaches here iff the device aborted
2016 * both flavors of IDENTIFYs which happens
2017 * sometimes with phantom devices.
2019 ata_dev_printk(dev
, KERN_DEBUG
,
2020 "both IDENTIFYs aborted, assuming NODEV\n");
2025 reason
= "I/O error";
2029 /* Falling back doesn't make sense if ID data was read
2030 * successfully at least once.
2034 swap_buf_le16(id
, ATA_ID_WORDS
);
2038 reason
= "device reports invalid type";
2040 if (class == ATA_DEV_ATA
) {
2041 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2044 if (ata_id_is_ata(id
))
2048 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2051 * Drive powered-up in standby mode, and requires a specific
2052 * SET_FEATURES spin-up subcommand before it will accept
2053 * anything other than the original IDENTIFY command.
2055 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2056 if (err_mask
&& id
[2] != 0x738c) {
2058 reason
= "SPINUP failed";
2062 * If the drive initially returned incomplete IDENTIFY info,
2063 * we now must reissue the IDENTIFY command.
2065 if (id
[2] == 0x37c8)
2069 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2071 * The exact sequence expected by certain pre-ATA4 drives is:
2073 * IDENTIFY (optional in early ATA)
2074 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2076 * Some drives were very specific about that exact sequence.
2078 * Note that ATA4 says lba is mandatory so the second check
2079 * shoud never trigger.
2081 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2082 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2085 reason
= "INIT_DEV_PARAMS failed";
2089 /* current CHS translation info (id[53-58]) might be
2090 * changed. reread the identify device info.
2092 flags
&= ~ATA_READID_POSTRESET
;
2102 if (ata_msg_warn(ap
))
2103 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2104 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2108 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2110 struct ata_port
*ap
= dev
->link
->ap
;
2111 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2114 static void ata_dev_config_ncq(struct ata_device
*dev
,
2115 char *desc
, size_t desc_sz
)
2117 struct ata_port
*ap
= dev
->link
->ap
;
2118 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2120 if (!ata_id_has_ncq(dev
->id
)) {
2124 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2125 snprintf(desc
, desc_sz
, "NCQ (not used)");
2128 if (ap
->flags
& ATA_FLAG_NCQ
) {
2129 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2130 dev
->flags
|= ATA_DFLAG_NCQ
;
2133 if (hdepth
>= ddepth
)
2134 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2136 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2140 * ata_dev_configure - Configure the specified ATA/ATAPI device
2141 * @dev: Target device to configure
2143 * Configure @dev according to @dev->id. Generic and low-level
2144 * driver specific fixups are also applied.
2147 * Kernel thread context (may sleep)
2150 * 0 on success, -errno otherwise
2152 int ata_dev_configure(struct ata_device
*dev
)
2154 struct ata_port
*ap
= dev
->link
->ap
;
2155 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2156 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2157 const u16
*id
= dev
->id
;
2158 unsigned long xfer_mask
;
2159 char revbuf
[7]; /* XYZ-99\0 */
2160 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2161 char modelbuf
[ATA_ID_PROD_LEN
+1];
2164 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2165 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2170 if (ata_msg_probe(ap
))
2171 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2174 dev
->horkage
|= ata_dev_blacklisted(dev
);
2175 ata_force_horkage(dev
);
2177 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2178 ata_dev_printk(dev
, KERN_INFO
,
2179 "unsupported device, disabling\n");
2180 ata_dev_disable(dev
);
2184 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2185 dev
->class == ATA_DEV_ATAPI
) {
2186 ata_dev_printk(dev
, KERN_WARNING
,
2187 "WARNING: ATAPI is %s, device ignored.\n",
2188 atapi_enabled
? "not supported with this driver"
2190 ata_dev_disable(dev
);
2194 /* let ACPI work its magic */
2195 rc
= ata_acpi_on_devcfg(dev
);
2199 /* massage HPA, do it early as it might change IDENTIFY data */
2200 rc
= ata_hpa_resize(dev
);
2204 /* print device capabilities */
2205 if (ata_msg_probe(ap
))
2206 ata_dev_printk(dev
, KERN_DEBUG
,
2207 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2208 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2210 id
[49], id
[82], id
[83], id
[84],
2211 id
[85], id
[86], id
[87], id
[88]);
2213 /* initialize to-be-configured parameters */
2214 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2215 dev
->max_sectors
= 0;
2223 * common ATA, ATAPI feature tests
2226 /* find max transfer mode; for printk only */
2227 xfer_mask
= ata_id_xfermask(id
);
2229 if (ata_msg_probe(ap
))
2232 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2233 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2236 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2239 /* ATA-specific feature tests */
2240 if (dev
->class == ATA_DEV_ATA
) {
2241 if (ata_id_is_cfa(id
)) {
2242 if (id
[162] & 1) /* CPRM may make this media unusable */
2243 ata_dev_printk(dev
, KERN_WARNING
,
2244 "supports DRM functions and may "
2245 "not be fully accessable.\n");
2246 snprintf(revbuf
, 7, "CFA");
2248 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2249 /* Warn the user if the device has TPM extensions */
2250 if (ata_id_has_tpm(id
))
2251 ata_dev_printk(dev
, KERN_WARNING
,
2252 "supports DRM functions and may "
2253 "not be fully accessable.\n");
2256 dev
->n_sectors
= ata_id_n_sectors(id
);
2258 if (dev
->id
[59] & 0x100)
2259 dev
->multi_count
= dev
->id
[59] & 0xff;
2261 if (ata_id_has_lba(id
)) {
2262 const char *lba_desc
;
2266 dev
->flags
|= ATA_DFLAG_LBA
;
2267 if (ata_id_has_lba48(id
)) {
2268 dev
->flags
|= ATA_DFLAG_LBA48
;
2271 if (dev
->n_sectors
>= (1UL << 28) &&
2272 ata_id_has_flush_ext(id
))
2273 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2277 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2279 /* print device info to dmesg */
2280 if (ata_msg_drv(ap
) && print_info
) {
2281 ata_dev_printk(dev
, KERN_INFO
,
2282 "%s: %s, %s, max %s\n",
2283 revbuf
, modelbuf
, fwrevbuf
,
2284 ata_mode_string(xfer_mask
));
2285 ata_dev_printk(dev
, KERN_INFO
,
2286 "%Lu sectors, multi %u: %s %s\n",
2287 (unsigned long long)dev
->n_sectors
,
2288 dev
->multi_count
, lba_desc
, ncq_desc
);
2293 /* Default translation */
2294 dev
->cylinders
= id
[1];
2296 dev
->sectors
= id
[6];
2298 if (ata_id_current_chs_valid(id
)) {
2299 /* Current CHS translation is valid. */
2300 dev
->cylinders
= id
[54];
2301 dev
->heads
= id
[55];
2302 dev
->sectors
= id
[56];
2305 /* print device info to dmesg */
2306 if (ata_msg_drv(ap
) && print_info
) {
2307 ata_dev_printk(dev
, KERN_INFO
,
2308 "%s: %s, %s, max %s\n",
2309 revbuf
, modelbuf
, fwrevbuf
,
2310 ata_mode_string(xfer_mask
));
2311 ata_dev_printk(dev
, KERN_INFO
,
2312 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2313 (unsigned long long)dev
->n_sectors
,
2314 dev
->multi_count
, dev
->cylinders
,
2315 dev
->heads
, dev
->sectors
);
2322 /* ATAPI-specific feature tests */
2323 else if (dev
->class == ATA_DEV_ATAPI
) {
2324 const char *cdb_intr_string
= "";
2325 const char *atapi_an_string
= "";
2326 const char *dma_dir_string
= "";
2329 rc
= atapi_cdb_len(id
);
2330 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2331 if (ata_msg_warn(ap
))
2332 ata_dev_printk(dev
, KERN_WARNING
,
2333 "unsupported CDB len\n");
2337 dev
->cdb_len
= (unsigned int) rc
;
2339 /* Enable ATAPI AN if both the host and device have
2340 * the support. If PMP is attached, SNTF is required
2341 * to enable ATAPI AN to discern between PHY status
2342 * changed notifications and ATAPI ANs.
2344 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2345 (!sata_pmp_attached(ap
) ||
2346 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2347 unsigned int err_mask
;
2349 /* issue SET feature command to turn this on */
2350 err_mask
= ata_dev_set_feature(dev
,
2351 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2353 ata_dev_printk(dev
, KERN_ERR
,
2354 "failed to enable ATAPI AN "
2355 "(err_mask=0x%x)\n", err_mask
);
2357 dev
->flags
|= ATA_DFLAG_AN
;
2358 atapi_an_string
= ", ATAPI AN";
2362 if (ata_id_cdb_intr(dev
->id
)) {
2363 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2364 cdb_intr_string
= ", CDB intr";
2367 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2368 dev
->flags
|= ATA_DFLAG_DMADIR
;
2369 dma_dir_string
= ", DMADIR";
2372 /* print device info to dmesg */
2373 if (ata_msg_drv(ap
) && print_info
)
2374 ata_dev_printk(dev
, KERN_INFO
,
2375 "ATAPI: %s, %s, max %s%s%s%s\n",
2377 ata_mode_string(xfer_mask
),
2378 cdb_intr_string
, atapi_an_string
,
2382 /* determine max_sectors */
2383 dev
->max_sectors
= ATA_MAX_SECTORS
;
2384 if (dev
->flags
& ATA_DFLAG_LBA48
)
2385 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2387 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2388 if (ata_id_has_hipm(dev
->id
))
2389 dev
->flags
|= ATA_DFLAG_HIPM
;
2390 if (ata_id_has_dipm(dev
->id
))
2391 dev
->flags
|= ATA_DFLAG_DIPM
;
2394 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2396 if (ata_dev_knobble(dev
)) {
2397 if (ata_msg_drv(ap
) && print_info
)
2398 ata_dev_printk(dev
, KERN_INFO
,
2399 "applying bridge limits\n");
2400 dev
->udma_mask
&= ATA_UDMA5
;
2401 dev
->max_sectors
= ATA_MAX_SECTORS
;
2404 if ((dev
->class == ATA_DEV_ATAPI
) &&
2405 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2406 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2407 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2410 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2411 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2414 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2415 dev
->horkage
|= ATA_HORKAGE_IPM
;
2417 /* reset link pm_policy for this port to no pm */
2418 ap
->pm_policy
= MAX_PERFORMANCE
;
2421 if (ap
->ops
->dev_config
)
2422 ap
->ops
->dev_config(dev
);
2424 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2425 /* Let the user know. We don't want to disallow opens for
2426 rescue purposes, or in case the vendor is just a blithering
2427 idiot. Do this after the dev_config call as some controllers
2428 with buggy firmware may want to avoid reporting false device
2432 ata_dev_printk(dev
, KERN_WARNING
,
2433 "Drive reports diagnostics failure. This may indicate a drive\n");
2434 ata_dev_printk(dev
, KERN_WARNING
,
2435 "fault or invalid emulation. Contact drive vendor for information.\n");
2439 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2440 ata_dev_printk(dev
, KERN_WARNING
, "WARNING: device requires "
2441 "firmware update to be fully functional.\n");
2442 ata_dev_printk(dev
, KERN_WARNING
, " contact the vendor "
2443 "or visit http://ata.wiki.kernel.org.\n");
2449 if (ata_msg_probe(ap
))
2450 ata_dev_printk(dev
, KERN_DEBUG
,
2451 "%s: EXIT, err\n", __func__
);
2456 * ata_cable_40wire - return 40 wire cable type
2459 * Helper method for drivers which want to hardwire 40 wire cable
2463 int ata_cable_40wire(struct ata_port
*ap
)
2465 return ATA_CBL_PATA40
;
2469 * ata_cable_80wire - return 80 wire cable type
2472 * Helper method for drivers which want to hardwire 80 wire cable
2476 int ata_cable_80wire(struct ata_port
*ap
)
2478 return ATA_CBL_PATA80
;
2482 * ata_cable_unknown - return unknown PATA cable.
2485 * Helper method for drivers which have no PATA cable detection.
2488 int ata_cable_unknown(struct ata_port
*ap
)
2490 return ATA_CBL_PATA_UNK
;
2494 * ata_cable_ignore - return ignored PATA cable.
2497 * Helper method for drivers which don't use cable type to limit
2500 int ata_cable_ignore(struct ata_port
*ap
)
2502 return ATA_CBL_PATA_IGN
;
2506 * ata_cable_sata - return SATA cable type
2509 * Helper method for drivers which have SATA cables
2512 int ata_cable_sata(struct ata_port
*ap
)
2514 return ATA_CBL_SATA
;
2518 * ata_bus_probe - Reset and probe ATA bus
2521 * Master ATA bus probing function. Initiates a hardware-dependent
2522 * bus reset, then attempts to identify any devices found on
2526 * PCI/etc. bus probe sem.
2529 * Zero on success, negative errno otherwise.
2532 int ata_bus_probe(struct ata_port
*ap
)
2534 unsigned int classes
[ATA_MAX_DEVICES
];
2535 int tries
[ATA_MAX_DEVICES
];
2537 struct ata_device
*dev
;
2541 ata_link_for_each_dev(dev
, &ap
->link
)
2542 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2545 ata_link_for_each_dev(dev
, &ap
->link
) {
2546 /* If we issue an SRST then an ATA drive (not ATAPI)
2547 * may change configuration and be in PIO0 timing. If
2548 * we do a hard reset (or are coming from power on)
2549 * this is true for ATA or ATAPI. Until we've set a
2550 * suitable controller mode we should not touch the
2551 * bus as we may be talking too fast.
2553 dev
->pio_mode
= XFER_PIO_0
;
2555 /* If the controller has a pio mode setup function
2556 * then use it to set the chipset to rights. Don't
2557 * touch the DMA setup as that will be dealt with when
2558 * configuring devices.
2560 if (ap
->ops
->set_piomode
)
2561 ap
->ops
->set_piomode(ap
, dev
);
2564 /* reset and determine device classes */
2565 ap
->ops
->phy_reset(ap
);
2567 ata_link_for_each_dev(dev
, &ap
->link
) {
2568 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2569 dev
->class != ATA_DEV_UNKNOWN
)
2570 classes
[dev
->devno
] = dev
->class;
2572 classes
[dev
->devno
] = ATA_DEV_NONE
;
2574 dev
->class = ATA_DEV_UNKNOWN
;
2579 /* read IDENTIFY page and configure devices. We have to do the identify
2580 specific sequence bass-ackwards so that PDIAG- is released by
2583 ata_link_for_each_dev_reverse(dev
, &ap
->link
) {
2584 if (tries
[dev
->devno
])
2585 dev
->class = classes
[dev
->devno
];
2587 if (!ata_dev_enabled(dev
))
2590 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2596 /* Now ask for the cable type as PDIAG- should have been released */
2597 if (ap
->ops
->cable_detect
)
2598 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2600 /* We may have SATA bridge glue hiding here irrespective of the
2601 reported cable types and sensed types */
2602 ata_link_for_each_dev(dev
, &ap
->link
) {
2603 if (!ata_dev_enabled(dev
))
2605 /* SATA drives indicate we have a bridge. We don't know which
2606 end of the link the bridge is which is a problem */
2607 if (ata_id_is_sata(dev
->id
))
2608 ap
->cbl
= ATA_CBL_SATA
;
2611 /* After the identify sequence we can now set up the devices. We do
2612 this in the normal order so that the user doesn't get confused */
2614 ata_link_for_each_dev(dev
, &ap
->link
) {
2615 if (!ata_dev_enabled(dev
))
2618 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2619 rc
= ata_dev_configure(dev
);
2620 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2625 /* configure transfer mode */
2626 rc
= ata_set_mode(&ap
->link
, &dev
);
2630 ata_link_for_each_dev(dev
, &ap
->link
)
2631 if (ata_dev_enabled(dev
))
2634 /* no device present, disable port */
2635 ata_port_disable(ap
);
2639 tries
[dev
->devno
]--;
2643 /* eeek, something went very wrong, give up */
2644 tries
[dev
->devno
] = 0;
2648 /* give it just one more chance */
2649 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2651 if (tries
[dev
->devno
] == 1) {
2652 /* This is the last chance, better to slow
2653 * down than lose it.
2655 sata_down_spd_limit(&ap
->link
);
2656 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2660 if (!tries
[dev
->devno
])
2661 ata_dev_disable(dev
);
2667 * ata_port_probe - Mark port as enabled
2668 * @ap: Port for which we indicate enablement
2670 * Modify @ap data structure such that the system
2671 * thinks that the entire port is enabled.
2673 * LOCKING: host lock, or some other form of
2677 void ata_port_probe(struct ata_port
*ap
)
2679 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2683 * sata_print_link_status - Print SATA link status
2684 * @link: SATA link to printk link status about
2686 * This function prints link speed and status of a SATA link.
2691 static void sata_print_link_status(struct ata_link
*link
)
2693 u32 sstatus
, scontrol
, tmp
;
2695 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2697 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2699 if (ata_link_online(link
)) {
2700 tmp
= (sstatus
>> 4) & 0xf;
2701 ata_link_printk(link
, KERN_INFO
,
2702 "SATA link up %s (SStatus %X SControl %X)\n",
2703 sata_spd_string(tmp
), sstatus
, scontrol
);
2705 ata_link_printk(link
, KERN_INFO
,
2706 "SATA link down (SStatus %X SControl %X)\n",
2712 * ata_dev_pair - return other device on cable
2715 * Obtain the other device on the same cable, or if none is
2716 * present NULL is returned
2719 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2721 struct ata_link
*link
= adev
->link
;
2722 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2723 if (!ata_dev_enabled(pair
))
2729 * ata_port_disable - Disable port.
2730 * @ap: Port to be disabled.
2732 * Modify @ap data structure such that the system
2733 * thinks that the entire port is disabled, and should
2734 * never attempt to probe or communicate with devices
2737 * LOCKING: host lock, or some other form of
2741 void ata_port_disable(struct ata_port
*ap
)
2743 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2744 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2745 ap
->flags
|= ATA_FLAG_DISABLED
;
2749 * sata_down_spd_limit - adjust SATA spd limit downward
2750 * @link: Link to adjust SATA spd limit for
2752 * Adjust SATA spd limit of @link downward. Note that this
2753 * function only adjusts the limit. The change must be applied
2754 * using sata_set_spd().
2757 * Inherited from caller.
2760 * 0 on success, negative errno on failure
2762 int sata_down_spd_limit(struct ata_link
*link
)
2764 u32 sstatus
, spd
, mask
;
2767 if (!sata_scr_valid(link
))
2770 /* If SCR can be read, use it to determine the current SPD.
2771 * If not, use cached value in link->sata_spd.
2773 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2775 spd
= (sstatus
>> 4) & 0xf;
2777 spd
= link
->sata_spd
;
2779 mask
= link
->sata_spd_limit
;
2783 /* unconditionally mask off the highest bit */
2784 highbit
= fls(mask
) - 1;
2785 mask
&= ~(1 << highbit
);
2787 /* Mask off all speeds higher than or equal to the current
2788 * one. Force 1.5Gbps if current SPD is not available.
2791 mask
&= (1 << (spd
- 1)) - 1;
2795 /* were we already at the bottom? */
2799 link
->sata_spd_limit
= mask
;
2801 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2802 sata_spd_string(fls(mask
)));
2807 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2809 struct ata_link
*host_link
= &link
->ap
->link
;
2810 u32 limit
, target
, spd
;
2812 limit
= link
->sata_spd_limit
;
2814 /* Don't configure downstream link faster than upstream link.
2815 * It doesn't speed up anything and some PMPs choke on such
2818 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2819 limit
&= (1 << host_link
->sata_spd
) - 1;
2821 if (limit
== UINT_MAX
)
2824 target
= fls(limit
);
2826 spd
= (*scontrol
>> 4) & 0xf;
2827 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2829 return spd
!= target
;
2833 * sata_set_spd_needed - is SATA spd configuration needed
2834 * @link: Link in question
2836 * Test whether the spd limit in SControl matches
2837 * @link->sata_spd_limit. This function is used to determine
2838 * whether hardreset is necessary to apply SATA spd
2842 * Inherited from caller.
2845 * 1 if SATA spd configuration is needed, 0 otherwise.
2847 static int sata_set_spd_needed(struct ata_link
*link
)
2851 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2854 return __sata_set_spd_needed(link
, &scontrol
);
2858 * sata_set_spd - set SATA spd according to spd limit
2859 * @link: Link to set SATA spd for
2861 * Set SATA spd of @link according to sata_spd_limit.
2864 * Inherited from caller.
2867 * 0 if spd doesn't need to be changed, 1 if spd has been
2868 * changed. Negative errno if SCR registers are inaccessible.
2870 int sata_set_spd(struct ata_link
*link
)
2875 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2878 if (!__sata_set_spd_needed(link
, &scontrol
))
2881 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2888 * This mode timing computation functionality is ported over from
2889 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2892 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2893 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2894 * for UDMA6, which is currently supported only by Maxtor drives.
2896 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2899 static const struct ata_timing ata_timing
[] = {
2900 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2901 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
2902 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
2903 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
2904 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
2905 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
2906 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 100, 0 },
2907 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 80, 0 },
2909 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
2910 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
2911 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
2913 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
2914 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
2915 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
2916 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 100, 0 },
2917 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 80, 0 },
2919 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2920 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
2921 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
2922 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
2923 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
2924 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
2925 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
2926 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
2931 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2932 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2934 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2936 q
->setup
= EZ(t
->setup
* 1000, T
);
2937 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2938 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2939 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2940 q
->active
= EZ(t
->active
* 1000, T
);
2941 q
->recover
= EZ(t
->recover
* 1000, T
);
2942 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2943 q
->udma
= EZ(t
->udma
* 1000, UT
);
2946 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2947 struct ata_timing
*m
, unsigned int what
)
2949 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2950 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2951 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2952 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2953 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2954 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2955 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2956 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2959 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2961 const struct ata_timing
*t
= ata_timing
;
2963 while (xfer_mode
> t
->mode
)
2966 if (xfer_mode
== t
->mode
)
2971 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2972 struct ata_timing
*t
, int T
, int UT
)
2974 const struct ata_timing
*s
;
2975 struct ata_timing p
;
2981 if (!(s
= ata_timing_find_mode(speed
)))
2984 memcpy(t
, s
, sizeof(*s
));
2987 * If the drive is an EIDE drive, it can tell us it needs extended
2988 * PIO/MW_DMA cycle timing.
2991 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2992 memset(&p
, 0, sizeof(p
));
2993 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
2994 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
2995 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
2996 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
2997 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
2999 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
3003 * Convert the timing to bus clock counts.
3006 ata_timing_quantize(t
, t
, T
, UT
);
3009 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3010 * S.M.A.R.T * and some other commands. We have to ensure that the
3011 * DMA cycle timing is slower/equal than the fastest PIO timing.
3014 if (speed
> XFER_PIO_6
) {
3015 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3016 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3020 * Lengthen active & recovery time so that cycle time is correct.
3023 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3024 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3025 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3028 if (t
->active
+ t
->recover
< t
->cycle
) {
3029 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3030 t
->recover
= t
->cycle
- t
->active
;
3033 /* In a few cases quantisation may produce enough errors to
3034 leave t->cycle too low for the sum of active and recovery
3035 if so we must correct this */
3036 if (t
->active
+ t
->recover
> t
->cycle
)
3037 t
->cycle
= t
->active
+ t
->recover
;
3043 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3044 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3045 * @cycle: cycle duration in ns
3047 * Return matching xfer mode for @cycle. The returned mode is of
3048 * the transfer type specified by @xfer_shift. If @cycle is too
3049 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3050 * than the fastest known mode, the fasted mode is returned.
3056 * Matching xfer_mode, 0xff if no match found.
3058 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3060 u8 base_mode
= 0xff, last_mode
= 0xff;
3061 const struct ata_xfer_ent
*ent
;
3062 const struct ata_timing
*t
;
3064 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3065 if (ent
->shift
== xfer_shift
)
3066 base_mode
= ent
->base
;
3068 for (t
= ata_timing_find_mode(base_mode
);
3069 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3070 unsigned short this_cycle
;
3072 switch (xfer_shift
) {
3074 case ATA_SHIFT_MWDMA
:
3075 this_cycle
= t
->cycle
;
3077 case ATA_SHIFT_UDMA
:
3078 this_cycle
= t
->udma
;
3084 if (cycle
> this_cycle
)
3087 last_mode
= t
->mode
;
3094 * ata_down_xfermask_limit - adjust dev xfer masks downward
3095 * @dev: Device to adjust xfer masks
3096 * @sel: ATA_DNXFER_* selector
3098 * Adjust xfer masks of @dev downward. Note that this function
3099 * does not apply the change. Invoking ata_set_mode() afterwards
3100 * will apply the limit.
3103 * Inherited from caller.
3106 * 0 on success, negative errno on failure
3108 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3111 unsigned long orig_mask
, xfer_mask
;
3112 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3115 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3116 sel
&= ~ATA_DNXFER_QUIET
;
3118 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3121 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3124 case ATA_DNXFER_PIO
:
3125 highbit
= fls(pio_mask
) - 1;
3126 pio_mask
&= ~(1 << highbit
);
3129 case ATA_DNXFER_DMA
:
3131 highbit
= fls(udma_mask
) - 1;
3132 udma_mask
&= ~(1 << highbit
);
3135 } else if (mwdma_mask
) {
3136 highbit
= fls(mwdma_mask
) - 1;
3137 mwdma_mask
&= ~(1 << highbit
);
3143 case ATA_DNXFER_40C
:
3144 udma_mask
&= ATA_UDMA_MASK_40C
;
3147 case ATA_DNXFER_FORCE_PIO0
:
3149 case ATA_DNXFER_FORCE_PIO
:
3158 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3160 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3164 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3165 snprintf(buf
, sizeof(buf
), "%s:%s",
3166 ata_mode_string(xfer_mask
),
3167 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3169 snprintf(buf
, sizeof(buf
), "%s",
3170 ata_mode_string(xfer_mask
));
3172 ata_dev_printk(dev
, KERN_WARNING
,
3173 "limiting speed to %s\n", buf
);
3176 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3182 static int ata_dev_set_mode(struct ata_device
*dev
)
3184 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3185 const char *dev_err_whine
= "";
3186 int ign_dev_err
= 0;
3187 unsigned int err_mask
;
3190 dev
->flags
&= ~ATA_DFLAG_PIO
;
3191 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3192 dev
->flags
|= ATA_DFLAG_PIO
;
3194 err_mask
= ata_dev_set_xfermode(dev
);
3196 if (err_mask
& ~AC_ERR_DEV
)
3200 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3201 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3202 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3206 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3207 /* Old CFA may refuse this command, which is just fine */
3208 if (ata_id_is_cfa(dev
->id
))
3210 /* Catch several broken garbage emulations plus some pre
3212 if (ata_id_major_version(dev
->id
) == 0 &&
3213 dev
->pio_mode
<= XFER_PIO_2
)
3215 /* Some very old devices and some bad newer ones fail
3216 any kind of SET_XFERMODE request but support PIO0-2
3217 timings and no IORDY */
3218 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3221 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3222 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3223 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3224 dev
->dma_mode
== XFER_MW_DMA_0
&&
3225 (dev
->id
[63] >> 8) & 1)
3228 /* if the device is actually configured correctly, ignore dev err */
3229 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3232 if (err_mask
& AC_ERR_DEV
) {
3236 dev_err_whine
= " (device error ignored)";
3239 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3240 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3242 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3243 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3249 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3250 "(err_mask=0x%x)\n", err_mask
);
3255 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3256 * @link: link on which timings will be programmed
3257 * @r_failed_dev: out parameter for failed device
3259 * Standard implementation of the function used to tune and set
3260 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3261 * ata_dev_set_mode() fails, pointer to the failing device is
3262 * returned in @r_failed_dev.
3265 * PCI/etc. bus probe sem.
3268 * 0 on success, negative errno otherwise
3271 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3273 struct ata_port
*ap
= link
->ap
;
3274 struct ata_device
*dev
;
3275 int rc
= 0, used_dma
= 0, found
= 0;
3277 /* step 1: calculate xfer_mask */
3278 ata_link_for_each_dev(dev
, link
) {
3279 unsigned long pio_mask
, dma_mask
;
3280 unsigned int mode_mask
;
3282 if (!ata_dev_enabled(dev
))
3285 mode_mask
= ATA_DMA_MASK_ATA
;
3286 if (dev
->class == ATA_DEV_ATAPI
)
3287 mode_mask
= ATA_DMA_MASK_ATAPI
;
3288 else if (ata_id_is_cfa(dev
->id
))
3289 mode_mask
= ATA_DMA_MASK_CFA
;
3291 ata_dev_xfermask(dev
);
3292 ata_force_xfermask(dev
);
3294 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3295 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3297 if (libata_dma_mask
& mode_mask
)
3298 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3302 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3303 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3306 if (ata_dma_enabled(dev
))
3312 /* step 2: always set host PIO timings */
3313 ata_link_for_each_dev(dev
, link
) {
3314 if (!ata_dev_enabled(dev
))
3317 if (dev
->pio_mode
== 0xff) {
3318 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3323 dev
->xfer_mode
= dev
->pio_mode
;
3324 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3325 if (ap
->ops
->set_piomode
)
3326 ap
->ops
->set_piomode(ap
, dev
);
3329 /* step 3: set host DMA timings */
3330 ata_link_for_each_dev(dev
, link
) {
3331 if (!ata_dev_enabled(dev
) || !ata_dma_enabled(dev
))
3334 dev
->xfer_mode
= dev
->dma_mode
;
3335 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3336 if (ap
->ops
->set_dmamode
)
3337 ap
->ops
->set_dmamode(ap
, dev
);
3340 /* step 4: update devices' xfer mode */
3341 ata_link_for_each_dev(dev
, link
) {
3342 /* don't update suspended devices' xfer mode */
3343 if (!ata_dev_enabled(dev
))
3346 rc
= ata_dev_set_mode(dev
);
3351 /* Record simplex status. If we selected DMA then the other
3352 * host channels are not permitted to do so.
3354 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3355 ap
->host
->simplex_claimed
= ap
;
3359 *r_failed_dev
= dev
;
3364 * ata_wait_ready - wait for link to become ready
3365 * @link: link to be waited on
3366 * @deadline: deadline jiffies for the operation
3367 * @check_ready: callback to check link readiness
3369 * Wait for @link to become ready. @check_ready should return
3370 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3371 * link doesn't seem to be occupied, other errno for other error
3374 * Transient -ENODEV conditions are allowed for
3375 * ATA_TMOUT_FF_WAIT.
3381 * 0 if @linke is ready before @deadline; otherwise, -errno.
3383 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3384 int (*check_ready
)(struct ata_link
*link
))
3386 unsigned long start
= jiffies
;
3387 unsigned long nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3390 if (time_after(nodev_deadline
, deadline
))
3391 nodev_deadline
= deadline
;
3394 unsigned long now
= jiffies
;
3397 ready
= tmp
= check_ready(link
);
3401 /* -ENODEV could be transient. Ignore -ENODEV if link
3402 * is online. Also, some SATA devices take a long
3403 * time to clear 0xff after reset. For example,
3404 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3405 * GoVault needs even more than that. Wait for
3406 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3408 * Note that some PATA controllers (pata_ali) explode
3409 * if status register is read more than once when
3410 * there's no device attached.
3412 if (ready
== -ENODEV
) {
3413 if (ata_link_online(link
))
3415 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3416 !ata_link_offline(link
) &&
3417 time_before(now
, nodev_deadline
))
3423 if (time_after(now
, deadline
))
3426 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3427 (deadline
- now
> 3 * HZ
)) {
3428 ata_link_printk(link
, KERN_WARNING
,
3429 "link is slow to respond, please be patient "
3430 "(ready=%d)\n", tmp
);
3439 * ata_wait_after_reset - wait for link to become ready after reset
3440 * @link: link to be waited on
3441 * @deadline: deadline jiffies for the operation
3442 * @check_ready: callback to check link readiness
3444 * Wait for @link to become ready after reset.
3450 * 0 if @linke is ready before @deadline; otherwise, -errno.
3452 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3453 int (*check_ready
)(struct ata_link
*link
))
3455 msleep(ATA_WAIT_AFTER_RESET
);
3457 return ata_wait_ready(link
, deadline
, check_ready
);
3461 * sata_link_debounce - debounce SATA phy status
3462 * @link: ATA link to debounce SATA phy status for
3463 * @params: timing parameters { interval, duratinon, timeout } in msec
3464 * @deadline: deadline jiffies for the operation
3466 * Make sure SStatus of @link reaches stable state, determined by
3467 * holding the same value where DET is not 1 for @duration polled
3468 * every @interval, before @timeout. Timeout constraints the
3469 * beginning of the stable state. Because DET gets stuck at 1 on
3470 * some controllers after hot unplugging, this functions waits
3471 * until timeout then returns 0 if DET is stable at 1.
3473 * @timeout is further limited by @deadline. The sooner of the
3477 * Kernel thread context (may sleep)
3480 * 0 on success, -errno on failure.
3482 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3483 unsigned long deadline
)
3485 unsigned long interval
= params
[0];
3486 unsigned long duration
= params
[1];
3487 unsigned long last_jiffies
, t
;
3491 t
= ata_deadline(jiffies
, params
[2]);
3492 if (time_before(t
, deadline
))
3495 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3500 last_jiffies
= jiffies
;
3504 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3510 if (cur
== 1 && time_before(jiffies
, deadline
))
3512 if (time_after(jiffies
,
3513 ata_deadline(last_jiffies
, duration
)))
3518 /* unstable, start over */
3520 last_jiffies
= jiffies
;
3522 /* Check deadline. If debouncing failed, return
3523 * -EPIPE to tell upper layer to lower link speed.
3525 if (time_after(jiffies
, deadline
))
3531 * sata_link_resume - resume SATA link
3532 * @link: ATA link to resume SATA
3533 * @params: timing parameters { interval, duratinon, timeout } in msec
3534 * @deadline: deadline jiffies for the operation
3536 * Resume SATA phy @link and debounce it.
3539 * Kernel thread context (may sleep)
3542 * 0 on success, -errno on failure.
3544 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3545 unsigned long deadline
)
3547 u32 scontrol
, serror
;
3550 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3553 scontrol
= (scontrol
& 0x0f0) | 0x300;
3555 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3558 /* Some PHYs react badly if SStatus is pounded immediately
3559 * after resuming. Delay 200ms before debouncing.
3563 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3566 /* clear SError, some PHYs require this even for SRST to work */
3567 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3568 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3570 return rc
!= -EINVAL
? rc
: 0;
3574 * ata_std_prereset - prepare for reset
3575 * @link: ATA link to be reset
3576 * @deadline: deadline jiffies for the operation
3578 * @link is about to be reset. Initialize it. Failure from
3579 * prereset makes libata abort whole reset sequence and give up
3580 * that port, so prereset should be best-effort. It does its
3581 * best to prepare for reset sequence but if things go wrong, it
3582 * should just whine, not fail.
3585 * Kernel thread context (may sleep)
3588 * 0 on success, -errno otherwise.
3590 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3592 struct ata_port
*ap
= link
->ap
;
3593 struct ata_eh_context
*ehc
= &link
->eh_context
;
3594 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3597 /* if we're about to do hardreset, nothing more to do */
3598 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3601 /* if SATA, resume link */
3602 if (ap
->flags
& ATA_FLAG_SATA
) {
3603 rc
= sata_link_resume(link
, timing
, deadline
);
3604 /* whine about phy resume failure but proceed */
3605 if (rc
&& rc
!= -EOPNOTSUPP
)
3606 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3607 "link for reset (errno=%d)\n", rc
);
3610 /* no point in trying softreset on offline link */
3611 if (ata_link_offline(link
))
3612 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3618 * sata_link_hardreset - reset link via SATA phy reset
3619 * @link: link to reset
3620 * @timing: timing parameters { interval, duratinon, timeout } in msec
3621 * @deadline: deadline jiffies for the operation
3622 * @online: optional out parameter indicating link onlineness
3623 * @check_ready: optional callback to check link readiness
3625 * SATA phy-reset @link using DET bits of SControl register.
3626 * After hardreset, link readiness is waited upon using
3627 * ata_wait_ready() if @check_ready is specified. LLDs are
3628 * allowed to not specify @check_ready and wait itself after this
3629 * function returns. Device classification is LLD's
3632 * *@online is set to one iff reset succeeded and @link is online
3636 * Kernel thread context (may sleep)
3639 * 0 on success, -errno otherwise.
3641 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3642 unsigned long deadline
,
3643 bool *online
, int (*check_ready
)(struct ata_link
*))
3653 if (sata_set_spd_needed(link
)) {
3654 /* SATA spec says nothing about how to reconfigure
3655 * spd. To be on the safe side, turn off phy during
3656 * reconfiguration. This works for at least ICH7 AHCI
3659 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3662 scontrol
= (scontrol
& 0x0f0) | 0x304;
3664 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3670 /* issue phy wake/reset */
3671 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3674 scontrol
= (scontrol
& 0x0f0) | 0x301;
3676 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3679 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3680 * 10.4.2 says at least 1 ms.
3684 /* bring link back */
3685 rc
= sata_link_resume(link
, timing
, deadline
);
3688 /* if link is offline nothing more to do */
3689 if (ata_link_offline(link
))
3692 /* Link is online. From this point, -ENODEV too is an error. */
3696 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3697 /* If PMP is supported, we have to do follow-up SRST.
3698 * Some PMPs don't send D2H Reg FIS after hardreset if
3699 * the first port is empty. Wait only for
3700 * ATA_TMOUT_PMP_SRST_WAIT.
3703 unsigned long pmp_deadline
;
3705 pmp_deadline
= ata_deadline(jiffies
,
3706 ATA_TMOUT_PMP_SRST_WAIT
);
3707 if (time_after(pmp_deadline
, deadline
))
3708 pmp_deadline
= deadline
;
3709 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3717 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3719 if (rc
&& rc
!= -EAGAIN
) {
3720 /* online is set iff link is online && reset succeeded */
3723 ata_link_printk(link
, KERN_ERR
,
3724 "COMRESET failed (errno=%d)\n", rc
);
3726 DPRINTK("EXIT, rc=%d\n", rc
);
3731 * sata_std_hardreset - COMRESET w/o waiting or classification
3732 * @link: link to reset
3733 * @class: resulting class of attached device
3734 * @deadline: deadline jiffies for the operation
3736 * Standard SATA COMRESET w/o waiting or classification.
3739 * Kernel thread context (may sleep)
3742 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3744 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3745 unsigned long deadline
)
3747 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3752 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3753 return online
? -EAGAIN
: rc
;
3757 * ata_std_postreset - standard postreset callback
3758 * @link: the target ata_link
3759 * @classes: classes of attached devices
3761 * This function is invoked after a successful reset. Note that
3762 * the device might have been reset more than once using
3763 * different reset methods before postreset is invoked.
3766 * Kernel thread context (may sleep)
3768 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3774 /* reset complete, clear SError */
3775 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3776 sata_scr_write(link
, SCR_ERROR
, serror
);
3778 /* print link status */
3779 sata_print_link_status(link
);
3785 * ata_dev_same_device - Determine whether new ID matches configured device
3786 * @dev: device to compare against
3787 * @new_class: class of the new device
3788 * @new_id: IDENTIFY page of the new device
3790 * Compare @new_class and @new_id against @dev and determine
3791 * whether @dev is the device indicated by @new_class and
3798 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3800 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3803 const u16
*old_id
= dev
->id
;
3804 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3805 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3807 if (dev
->class != new_class
) {
3808 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3809 dev
->class, new_class
);
3813 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3814 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3815 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3816 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3818 if (strcmp(model
[0], model
[1])) {
3819 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
3820 "'%s' != '%s'\n", model
[0], model
[1]);
3824 if (strcmp(serial
[0], serial
[1])) {
3825 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
3826 "'%s' != '%s'\n", serial
[0], serial
[1]);
3834 * ata_dev_reread_id - Re-read IDENTIFY data
3835 * @dev: target ATA device
3836 * @readid_flags: read ID flags
3838 * Re-read IDENTIFY page and make sure @dev is still attached to
3842 * Kernel thread context (may sleep)
3845 * 0 on success, negative errno otherwise
3847 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3849 unsigned int class = dev
->class;
3850 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3854 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3858 /* is the device still there? */
3859 if (!ata_dev_same_device(dev
, class, id
))
3862 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3867 * ata_dev_revalidate - Revalidate ATA device
3868 * @dev: device to revalidate
3869 * @new_class: new class code
3870 * @readid_flags: read ID flags
3872 * Re-read IDENTIFY page, make sure @dev is still attached to the
3873 * port and reconfigure it according to the new IDENTIFY page.
3876 * Kernel thread context (may sleep)
3879 * 0 on success, negative errno otherwise
3881 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3882 unsigned int readid_flags
)
3884 u64 n_sectors
= dev
->n_sectors
;
3887 if (!ata_dev_enabled(dev
))
3890 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3891 if (ata_class_enabled(new_class
) &&
3892 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
3893 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
3894 dev
->class, new_class
);
3900 rc
= ata_dev_reread_id(dev
, readid_flags
);
3904 /* configure device according to the new ID */
3905 rc
= ata_dev_configure(dev
);
3909 /* verify n_sectors hasn't changed */
3910 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
3911 dev
->n_sectors
!= n_sectors
) {
3912 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
3914 (unsigned long long)n_sectors
,
3915 (unsigned long long)dev
->n_sectors
);
3917 /* restore original n_sectors */
3918 dev
->n_sectors
= n_sectors
;
3927 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
3931 struct ata_blacklist_entry
{
3932 const char *model_num
;
3933 const char *model_rev
;
3934 unsigned long horkage
;
3937 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
3938 /* Devices with DMA related problems under Linux */
3939 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
3940 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
3941 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
3942 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
3943 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
3944 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
3945 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
3946 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
3947 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
3948 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
3949 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
3950 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
3951 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
3952 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
3953 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
3954 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
3955 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
3956 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
3957 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
3958 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
3959 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
3960 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
3961 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
3962 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
3963 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
3964 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
3965 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
3966 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
3967 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
3968 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
3969 /* Odd clown on sil3726/4726 PMPs */
3970 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
3972 /* Weird ATAPI devices */
3973 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
3975 /* Devices we expect to fail diagnostics */
3977 /* Devices where NCQ should be avoided */
3979 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
3980 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
3981 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3982 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
3984 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
3985 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
3986 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
3987 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
3989 /* Seagate NCQ + FLUSH CACHE firmware bug */
3990 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ
|
3991 ATA_HORKAGE_FIRMWARE_WARN
},
3992 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ
|
3993 ATA_HORKAGE_FIRMWARE_WARN
},
3994 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ
|
3995 ATA_HORKAGE_FIRMWARE_WARN
},
3996 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ
|
3997 ATA_HORKAGE_FIRMWARE_WARN
},
3998 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ
|
3999 ATA_HORKAGE_FIRMWARE_WARN
},
4001 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ
|
4002 ATA_HORKAGE_FIRMWARE_WARN
},
4003 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ
|
4004 ATA_HORKAGE_FIRMWARE_WARN
},
4005 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ
|
4006 ATA_HORKAGE_FIRMWARE_WARN
},
4007 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ
|
4008 ATA_HORKAGE_FIRMWARE_WARN
},
4009 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ
|
4010 ATA_HORKAGE_FIRMWARE_WARN
},
4012 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ
|
4013 ATA_HORKAGE_FIRMWARE_WARN
},
4014 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ
|
4015 ATA_HORKAGE_FIRMWARE_WARN
},
4016 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ
|
4017 ATA_HORKAGE_FIRMWARE_WARN
},
4018 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ
|
4019 ATA_HORKAGE_FIRMWARE_WARN
},
4020 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ
|
4021 ATA_HORKAGE_FIRMWARE_WARN
},
4023 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ
|
4024 ATA_HORKAGE_FIRMWARE_WARN
},
4025 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ
|
4026 ATA_HORKAGE_FIRMWARE_WARN
},
4027 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ
|
4028 ATA_HORKAGE_FIRMWARE_WARN
},
4029 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ
|
4030 ATA_HORKAGE_FIRMWARE_WARN
},
4031 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ
|
4032 ATA_HORKAGE_FIRMWARE_WARN
},
4034 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ
|
4035 ATA_HORKAGE_FIRMWARE_WARN
},
4036 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ
|
4037 ATA_HORKAGE_FIRMWARE_WARN
},
4038 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ
|
4039 ATA_HORKAGE_FIRMWARE_WARN
},
4040 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ
|
4041 ATA_HORKAGE_FIRMWARE_WARN
},
4042 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ
|
4043 ATA_HORKAGE_FIRMWARE_WARN
},
4045 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ
|
4046 ATA_HORKAGE_FIRMWARE_WARN
},
4047 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ
|
4048 ATA_HORKAGE_FIRMWARE_WARN
},
4049 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ
|
4050 ATA_HORKAGE_FIRMWARE_WARN
},
4051 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ
|
4052 ATA_HORKAGE_FIRMWARE_WARN
},
4053 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ
|
4054 ATA_HORKAGE_FIRMWARE_WARN
},
4056 /* Blacklist entries taken from Silicon Image 3124/3132
4057 Windows driver .inf file - also several Linux problem reports */
4058 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4059 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4060 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4062 /* devices which puke on READ_NATIVE_MAX */
4063 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4064 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4065 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4066 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4068 /* Devices which report 1 sector over size HPA */
4069 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4070 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4071 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4073 /* Devices which get the IVB wrong */
4074 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4075 /* Maybe we should just blacklist TSSTcorp... */
4076 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB
, },
4077 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB
, },
4078 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4079 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4080 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4081 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4087 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4093 * check for trailing wildcard: *\0
4095 p
= strchr(patt
, wildchar
);
4096 if (p
&& ((*(p
+ 1)) == 0))
4107 return strncmp(patt
, name
, len
);
4110 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4112 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4113 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4114 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4116 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4117 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4119 while (ad
->model_num
) {
4120 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4121 if (ad
->model_rev
== NULL
)
4123 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4131 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4133 /* We don't support polling DMA.
4134 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4135 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4137 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4138 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4140 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4144 * ata_is_40wire - check drive side detection
4147 * Perform drive side detection decoding, allowing for device vendors
4148 * who can't follow the documentation.
4151 static int ata_is_40wire(struct ata_device
*dev
)
4153 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4154 return ata_drive_40wire_relaxed(dev
->id
);
4155 return ata_drive_40wire(dev
->id
);
4159 * cable_is_40wire - 40/80/SATA decider
4160 * @ap: port to consider
4162 * This function encapsulates the policy for speed management
4163 * in one place. At the moment we don't cache the result but
4164 * there is a good case for setting ap->cbl to the result when
4165 * we are called with unknown cables (and figuring out if it
4166 * impacts hotplug at all).
4168 * Return 1 if the cable appears to be 40 wire.
4171 static int cable_is_40wire(struct ata_port
*ap
)
4173 struct ata_link
*link
;
4174 struct ata_device
*dev
;
4176 /* If the controller thinks we are 40 wire, we are */
4177 if (ap
->cbl
== ATA_CBL_PATA40
)
4179 /* If the controller thinks we are 80 wire, we are */
4180 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4182 /* If the system is known to be 40 wire short cable (eg laptop),
4183 then we allow 80 wire modes even if the drive isn't sure */
4184 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4186 /* If the controller doesn't know we scan
4188 - Note: We look for all 40 wire detects at this point.
4189 Any 80 wire detect is taken to be 80 wire cable
4191 - In many setups only the one drive (slave if present)
4192 will give a valid detect
4193 - If you have a non detect capable drive you don't
4194 want it to colour the choice
4196 ata_port_for_each_link(link
, ap
) {
4197 ata_link_for_each_dev(dev
, link
) {
4198 if (!ata_is_40wire(dev
))
4206 * ata_dev_xfermask - Compute supported xfermask of the given device
4207 * @dev: Device to compute xfermask for
4209 * Compute supported xfermask of @dev and store it in
4210 * dev->*_mask. This function is responsible for applying all
4211 * known limits including host controller limits, device
4217 static void ata_dev_xfermask(struct ata_device
*dev
)
4219 struct ata_link
*link
= dev
->link
;
4220 struct ata_port
*ap
= link
->ap
;
4221 struct ata_host
*host
= ap
->host
;
4222 unsigned long xfer_mask
;
4224 /* controller modes available */
4225 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4226 ap
->mwdma_mask
, ap
->udma_mask
);
4228 /* drive modes available */
4229 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4230 dev
->mwdma_mask
, dev
->udma_mask
);
4231 xfer_mask
&= ata_id_xfermask(dev
->id
);
4234 * CFA Advanced TrueIDE timings are not allowed on a shared
4237 if (ata_dev_pair(dev
)) {
4238 /* No PIO5 or PIO6 */
4239 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4240 /* No MWDMA3 or MWDMA 4 */
4241 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4244 if (ata_dma_blacklisted(dev
)) {
4245 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4246 ata_dev_printk(dev
, KERN_WARNING
,
4247 "device is on DMA blacklist, disabling DMA\n");
4250 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4251 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4252 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4253 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4254 "other device, disabling DMA\n");
4257 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4258 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4260 if (ap
->ops
->mode_filter
)
4261 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4263 /* Apply cable rule here. Don't apply it early because when
4264 * we handle hot plug the cable type can itself change.
4265 * Check this last so that we know if the transfer rate was
4266 * solely limited by the cable.
4267 * Unknown or 80 wire cables reported host side are checked
4268 * drive side as well. Cases where we know a 40wire cable
4269 * is used safely for 80 are not checked here.
4271 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4272 /* UDMA/44 or higher would be available */
4273 if (cable_is_40wire(ap
)) {
4274 ata_dev_printk(dev
, KERN_WARNING
,
4275 "limited to UDMA/33 due to 40-wire cable\n");
4276 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4279 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4280 &dev
->mwdma_mask
, &dev
->udma_mask
);
4284 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4285 * @dev: Device to which command will be sent
4287 * Issue SET FEATURES - XFER MODE command to device @dev
4291 * PCI/etc. bus probe sem.
4294 * 0 on success, AC_ERR_* mask otherwise.
4297 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4299 struct ata_taskfile tf
;
4300 unsigned int err_mask
;
4302 /* set up set-features taskfile */
4303 DPRINTK("set features - xfer mode\n");
4305 /* Some controllers and ATAPI devices show flaky interrupt
4306 * behavior after setting xfer mode. Use polling instead.
4308 ata_tf_init(dev
, &tf
);
4309 tf
.command
= ATA_CMD_SET_FEATURES
;
4310 tf
.feature
= SETFEATURES_XFER
;
4311 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4312 tf
.protocol
= ATA_PROT_NODATA
;
4313 /* If we are using IORDY we must send the mode setting command */
4314 if (ata_pio_need_iordy(dev
))
4315 tf
.nsect
= dev
->xfer_mode
;
4316 /* If the device has IORDY and the controller does not - turn it off */
4317 else if (ata_id_has_iordy(dev
->id
))
4319 else /* In the ancient relic department - skip all of this */
4322 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4324 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4328 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4329 * @dev: Device to which command will be sent
4330 * @enable: Whether to enable or disable the feature
4331 * @feature: The sector count represents the feature to set
4333 * Issue SET FEATURES - SATA FEATURES command to device @dev
4334 * on port @ap with sector count
4337 * PCI/etc. bus probe sem.
4340 * 0 on success, AC_ERR_* mask otherwise.
4342 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4345 struct ata_taskfile tf
;
4346 unsigned int err_mask
;
4348 /* set up set-features taskfile */
4349 DPRINTK("set features - SATA features\n");
4351 ata_tf_init(dev
, &tf
);
4352 tf
.command
= ATA_CMD_SET_FEATURES
;
4353 tf
.feature
= enable
;
4354 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4355 tf
.protocol
= ATA_PROT_NODATA
;
4358 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4360 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4365 * ata_dev_init_params - Issue INIT DEV PARAMS command
4366 * @dev: Device to which command will be sent
4367 * @heads: Number of heads (taskfile parameter)
4368 * @sectors: Number of sectors (taskfile parameter)
4371 * Kernel thread context (may sleep)
4374 * 0 on success, AC_ERR_* mask otherwise.
4376 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4377 u16 heads
, u16 sectors
)
4379 struct ata_taskfile tf
;
4380 unsigned int err_mask
;
4382 /* Number of sectors per track 1-255. Number of heads 1-16 */
4383 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4384 return AC_ERR_INVALID
;
4386 /* set up init dev params taskfile */
4387 DPRINTK("init dev params \n");
4389 ata_tf_init(dev
, &tf
);
4390 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4391 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4392 tf
.protocol
= ATA_PROT_NODATA
;
4394 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4396 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4397 /* A clean abort indicates an original or just out of spec drive
4398 and we should continue as we issue the setup based on the
4399 drive reported working geometry */
4400 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4403 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4408 * ata_sg_clean - Unmap DMA memory associated with command
4409 * @qc: Command containing DMA memory to be released
4411 * Unmap all mapped DMA memory associated with this command.
4414 * spin_lock_irqsave(host lock)
4416 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4418 struct ata_port
*ap
= qc
->ap
;
4419 struct scatterlist
*sg
= qc
->sg
;
4420 int dir
= qc
->dma_dir
;
4422 WARN_ON(sg
== NULL
);
4424 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4427 dma_unmap_sg(ap
->dev
, sg
, qc
->n_elem
, dir
);
4429 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4434 * atapi_check_dma - Check whether ATAPI DMA can be supported
4435 * @qc: Metadata associated with taskfile to check
4437 * Allow low-level driver to filter ATA PACKET commands, returning
4438 * a status indicating whether or not it is OK to use DMA for the
4439 * supplied PACKET command.
4442 * spin_lock_irqsave(host lock)
4444 * RETURNS: 0 when ATAPI DMA can be used
4447 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4449 struct ata_port
*ap
= qc
->ap
;
4451 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4452 * few ATAPI devices choke on such DMA requests.
4454 if (unlikely(qc
->nbytes
& 15))
4457 if (ap
->ops
->check_atapi_dma
)
4458 return ap
->ops
->check_atapi_dma(qc
);
4464 * ata_std_qc_defer - Check whether a qc needs to be deferred
4465 * @qc: ATA command in question
4467 * Non-NCQ commands cannot run with any other command, NCQ or
4468 * not. As upper layer only knows the queue depth, we are
4469 * responsible for maintaining exclusion. This function checks
4470 * whether a new command @qc can be issued.
4473 * spin_lock_irqsave(host lock)
4476 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4478 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4480 struct ata_link
*link
= qc
->dev
->link
;
4482 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4483 if (!ata_tag_valid(link
->active_tag
))
4486 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4490 return ATA_DEFER_LINK
;
4493 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4496 * ata_sg_init - Associate command with scatter-gather table.
4497 * @qc: Command to be associated
4498 * @sg: Scatter-gather table.
4499 * @n_elem: Number of elements in s/g table.
4501 * Initialize the data-related elements of queued_cmd @qc
4502 * to point to a scatter-gather table @sg, containing @n_elem
4506 * spin_lock_irqsave(host lock)
4508 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4509 unsigned int n_elem
)
4512 qc
->n_elem
= n_elem
;
4517 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4518 * @qc: Command with scatter-gather table to be mapped.
4520 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4523 * spin_lock_irqsave(host lock)
4526 * Zero on success, negative on error.
4529 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4531 struct ata_port
*ap
= qc
->ap
;
4532 unsigned int n_elem
;
4534 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4536 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4540 DPRINTK("%d sg elements mapped\n", n_elem
);
4542 qc
->n_elem
= n_elem
;
4543 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4549 * swap_buf_le16 - swap halves of 16-bit words in place
4550 * @buf: Buffer to swap
4551 * @buf_words: Number of 16-bit words in buffer.
4553 * Swap halves of 16-bit words if needed to convert from
4554 * little-endian byte order to native cpu byte order, or
4558 * Inherited from caller.
4560 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4565 for (i
= 0; i
< buf_words
; i
++)
4566 buf
[i
] = le16_to_cpu(buf
[i
]);
4567 #endif /* __BIG_ENDIAN */
4571 * ata_qc_new - Request an available ATA command, for queueing
4572 * @ap: Port associated with device @dev
4573 * @dev: Device from whom we request an available command structure
4579 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4581 struct ata_queued_cmd
*qc
= NULL
;
4584 /* no command while frozen */
4585 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4588 /* the last tag is reserved for internal command. */
4589 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4590 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4591 qc
= __ata_qc_from_tag(ap
, i
);
4602 * ata_qc_new_init - Request an available ATA command, and initialize it
4603 * @dev: Device from whom we request an available command structure
4609 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4611 struct ata_port
*ap
= dev
->link
->ap
;
4612 struct ata_queued_cmd
*qc
;
4614 qc
= ata_qc_new(ap
);
4627 * ata_qc_free - free unused ata_queued_cmd
4628 * @qc: Command to complete
4630 * Designed to free unused ata_queued_cmd object
4631 * in case something prevents using it.
4634 * spin_lock_irqsave(host lock)
4636 void ata_qc_free(struct ata_queued_cmd
*qc
)
4638 struct ata_port
*ap
= qc
->ap
;
4641 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4645 if (likely(ata_tag_valid(tag
))) {
4646 qc
->tag
= ATA_TAG_POISON
;
4647 clear_bit(tag
, &ap
->qc_allocated
);
4651 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4653 struct ata_port
*ap
= qc
->ap
;
4654 struct ata_link
*link
= qc
->dev
->link
;
4656 WARN_ON(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4657 WARN_ON(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4659 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4662 /* command should be marked inactive atomically with qc completion */
4663 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4664 link
->sactive
&= ~(1 << qc
->tag
);
4666 ap
->nr_active_links
--;
4668 link
->active_tag
= ATA_TAG_POISON
;
4669 ap
->nr_active_links
--;
4672 /* clear exclusive status */
4673 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4674 ap
->excl_link
== link
))
4675 ap
->excl_link
= NULL
;
4677 /* atapi: mark qc as inactive to prevent the interrupt handler
4678 * from completing the command twice later, before the error handler
4679 * is called. (when rc != 0 and atapi request sense is needed)
4681 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4682 ap
->qc_active
&= ~(1 << qc
->tag
);
4684 /* call completion callback */
4685 qc
->complete_fn(qc
);
4688 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4690 struct ata_port
*ap
= qc
->ap
;
4692 qc
->result_tf
.flags
= qc
->tf
.flags
;
4693 ap
->ops
->qc_fill_rtf(qc
);
4696 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4698 struct ata_device
*dev
= qc
->dev
;
4700 if (ata_tag_internal(qc
->tag
))
4703 if (ata_is_nodata(qc
->tf
.protocol
))
4706 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4709 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4713 * ata_qc_complete - Complete an active ATA command
4714 * @qc: Command to complete
4715 * @err_mask: ATA Status register contents
4717 * Indicate to the mid and upper layers that an ATA
4718 * command has completed, with either an ok or not-ok status.
4721 * spin_lock_irqsave(host lock)
4723 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4725 struct ata_port
*ap
= qc
->ap
;
4727 /* XXX: New EH and old EH use different mechanisms to
4728 * synchronize EH with regular execution path.
4730 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4731 * Normal execution path is responsible for not accessing a
4732 * failed qc. libata core enforces the rule by returning NULL
4733 * from ata_qc_from_tag() for failed qcs.
4735 * Old EH depends on ata_qc_complete() nullifying completion
4736 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4737 * not synchronize with interrupt handler. Only PIO task is
4740 if (ap
->ops
->error_handler
) {
4741 struct ata_device
*dev
= qc
->dev
;
4742 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4744 WARN_ON(ap
->pflags
& ATA_PFLAG_FROZEN
);
4746 if (unlikely(qc
->err_mask
))
4747 qc
->flags
|= ATA_QCFLAG_FAILED
;
4749 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4750 /* always fill result TF for failed qc */
4753 if (!ata_tag_internal(qc
->tag
))
4754 ata_qc_schedule_eh(qc
);
4756 __ata_qc_complete(qc
);
4760 /* read result TF if requested */
4761 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4764 /* Some commands need post-processing after successful
4767 switch (qc
->tf
.command
) {
4768 case ATA_CMD_SET_FEATURES
:
4769 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4770 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4773 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4774 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4775 /* revalidate device */
4776 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4777 ata_port_schedule_eh(ap
);
4781 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4785 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4786 ata_verify_xfer(qc
);
4788 __ata_qc_complete(qc
);
4790 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4793 /* read result TF if failed or requested */
4794 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4797 __ata_qc_complete(qc
);
4802 * ata_qc_complete_multiple - Complete multiple qcs successfully
4803 * @ap: port in question
4804 * @qc_active: new qc_active mask
4806 * Complete in-flight commands. This functions is meant to be
4807 * called from low-level driver's interrupt routine to complete
4808 * requests normally. ap->qc_active and @qc_active is compared
4809 * and commands are completed accordingly.
4812 * spin_lock_irqsave(host lock)
4815 * Number of completed commands on success, -errno otherwise.
4817 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
4823 done_mask
= ap
->qc_active
^ qc_active
;
4825 if (unlikely(done_mask
& qc_active
)) {
4826 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
4827 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
4831 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
4832 struct ata_queued_cmd
*qc
;
4834 if (!(done_mask
& (1 << i
)))
4837 if ((qc
= ata_qc_from_tag(ap
, i
))) {
4838 ata_qc_complete(qc
);
4847 * ata_qc_issue - issue taskfile to device
4848 * @qc: command to issue to device
4850 * Prepare an ATA command to submission to device.
4851 * This includes mapping the data into a DMA-able
4852 * area, filling in the S/G table, and finally
4853 * writing the taskfile to hardware, starting the command.
4856 * spin_lock_irqsave(host lock)
4858 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4860 struct ata_port
*ap
= qc
->ap
;
4861 struct ata_link
*link
= qc
->dev
->link
;
4862 u8 prot
= qc
->tf
.protocol
;
4864 /* Make sure only one non-NCQ command is outstanding. The
4865 * check is skipped for old EH because it reuses active qc to
4866 * request ATAPI sense.
4868 WARN_ON(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4870 if (ata_is_ncq(prot
)) {
4871 WARN_ON(link
->sactive
& (1 << qc
->tag
));
4874 ap
->nr_active_links
++;
4875 link
->sactive
|= 1 << qc
->tag
;
4877 WARN_ON(link
->sactive
);
4879 ap
->nr_active_links
++;
4880 link
->active_tag
= qc
->tag
;
4883 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4884 ap
->qc_active
|= 1 << qc
->tag
;
4886 /* We guarantee to LLDs that they will have at least one
4887 * non-zero sg if the command is a data command.
4889 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
4891 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
4892 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
4893 if (ata_sg_setup(qc
))
4896 /* if device is sleeping, schedule reset and abort the link */
4897 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
4898 link
->eh_info
.action
|= ATA_EH_RESET
;
4899 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
4900 ata_link_abort(link
);
4904 ap
->ops
->qc_prep(qc
);
4906 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
4907 if (unlikely(qc
->err_mask
))
4912 qc
->err_mask
|= AC_ERR_SYSTEM
;
4914 ata_qc_complete(qc
);
4918 * sata_scr_valid - test whether SCRs are accessible
4919 * @link: ATA link to test SCR accessibility for
4921 * Test whether SCRs are accessible for @link.
4927 * 1 if SCRs are accessible, 0 otherwise.
4929 int sata_scr_valid(struct ata_link
*link
)
4931 struct ata_port
*ap
= link
->ap
;
4933 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
4937 * sata_scr_read - read SCR register of the specified port
4938 * @link: ATA link to read SCR for
4940 * @val: Place to store read value
4942 * Read SCR register @reg of @link into *@val. This function is
4943 * guaranteed to succeed if @link is ap->link, the cable type of
4944 * the port is SATA and the port implements ->scr_read.
4947 * None if @link is ap->link. Kernel thread context otherwise.
4950 * 0 on success, negative errno on failure.
4952 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
4954 if (ata_is_host_link(link
)) {
4955 struct ata_port
*ap
= link
->ap
;
4957 if (sata_scr_valid(link
))
4958 return ap
->ops
->scr_read(ap
, reg
, val
);
4962 return sata_pmp_scr_read(link
, reg
, val
);
4966 * sata_scr_write - write SCR register of the specified port
4967 * @link: ATA link to write SCR for
4968 * @reg: SCR to write
4969 * @val: value to write
4971 * Write @val to SCR register @reg of @link. This function is
4972 * guaranteed to succeed if @link is ap->link, the cable type of
4973 * the port is SATA and the port implements ->scr_read.
4976 * None if @link is ap->link. Kernel thread context otherwise.
4979 * 0 on success, negative errno on failure.
4981 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
4983 if (ata_is_host_link(link
)) {
4984 struct ata_port
*ap
= link
->ap
;
4986 if (sata_scr_valid(link
))
4987 return ap
->ops
->scr_write(ap
, reg
, val
);
4991 return sata_pmp_scr_write(link
, reg
, val
);
4995 * sata_scr_write_flush - write SCR register of the specified port and flush
4996 * @link: ATA link to write SCR for
4997 * @reg: SCR to write
4998 * @val: value to write
5000 * This function is identical to sata_scr_write() except that this
5001 * function performs flush after writing to the register.
5004 * None if @link is ap->link. Kernel thread context otherwise.
5007 * 0 on success, negative errno on failure.
5009 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5011 if (ata_is_host_link(link
)) {
5012 struct ata_port
*ap
= link
->ap
;
5015 if (sata_scr_valid(link
)) {
5016 rc
= ap
->ops
->scr_write(ap
, reg
, val
);
5018 rc
= ap
->ops
->scr_read(ap
, reg
, &val
);
5024 return sata_pmp_scr_write(link
, reg
, val
);
5028 * ata_link_online - test whether the given link is online
5029 * @link: ATA link to test
5031 * Test whether @link is online. Note that this function returns
5032 * 0 if online status of @link cannot be obtained, so
5033 * ata_link_online(link) != !ata_link_offline(link).
5039 * 1 if the port online status is available and online.
5041 int ata_link_online(struct ata_link
*link
)
5045 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5046 (sstatus
& 0xf) == 0x3)
5052 * ata_link_offline - test whether the given link is offline
5053 * @link: ATA link to test
5055 * Test whether @link is offline. Note that this function
5056 * returns 0 if offline status of @link cannot be obtained, so
5057 * ata_link_online(link) != !ata_link_offline(link).
5063 * 1 if the port offline status is available and offline.
5065 int ata_link_offline(struct ata_link
*link
)
5069 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5070 (sstatus
& 0xf) != 0x3)
5076 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5077 unsigned int action
, unsigned int ehi_flags
,
5080 unsigned long flags
;
5083 for (i
= 0; i
< host
->n_ports
; i
++) {
5084 struct ata_port
*ap
= host
->ports
[i
];
5085 struct ata_link
*link
;
5087 /* Previous resume operation might still be in
5088 * progress. Wait for PM_PENDING to clear.
5090 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5091 ata_port_wait_eh(ap
);
5092 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5095 /* request PM ops to EH */
5096 spin_lock_irqsave(ap
->lock
, flags
);
5101 ap
->pm_result
= &rc
;
5104 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5105 __ata_port_for_each_link(link
, ap
) {
5106 link
->eh_info
.action
|= action
;
5107 link
->eh_info
.flags
|= ehi_flags
;
5110 ata_port_schedule_eh(ap
);
5112 spin_unlock_irqrestore(ap
->lock
, flags
);
5114 /* wait and check result */
5116 ata_port_wait_eh(ap
);
5117 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5127 * ata_host_suspend - suspend host
5128 * @host: host to suspend
5131 * Suspend @host. Actual operation is performed by EH. This
5132 * function requests EH to perform PM operations and waits for EH
5136 * Kernel thread context (may sleep).
5139 * 0 on success, -errno on failure.
5141 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5146 * disable link pm on all ports before requesting
5149 ata_lpm_enable(host
);
5151 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5153 host
->dev
->power
.power_state
= mesg
;
5158 * ata_host_resume - resume host
5159 * @host: host to resume
5161 * Resume @host. Actual operation is performed by EH. This
5162 * function requests EH to perform PM operations and returns.
5163 * Note that all resume operations are performed parallely.
5166 * Kernel thread context (may sleep).
5168 void ata_host_resume(struct ata_host
*host
)
5170 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
5171 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5172 host
->dev
->power
.power_state
= PMSG_ON
;
5174 /* reenable link pm */
5175 ata_lpm_disable(host
);
5180 * ata_port_start - Set port up for dma.
5181 * @ap: Port to initialize
5183 * Called just after data structures for each port are
5184 * initialized. Allocates space for PRD table.
5186 * May be used as the port_start() entry in ata_port_operations.
5189 * Inherited from caller.
5191 int ata_port_start(struct ata_port
*ap
)
5193 struct device
*dev
= ap
->dev
;
5195 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5204 * ata_dev_init - Initialize an ata_device structure
5205 * @dev: Device structure to initialize
5207 * Initialize @dev in preparation for probing.
5210 * Inherited from caller.
5212 void ata_dev_init(struct ata_device
*dev
)
5214 struct ata_link
*link
= dev
->link
;
5215 struct ata_port
*ap
= link
->ap
;
5216 unsigned long flags
;
5218 /* SATA spd limit is bound to the first device */
5219 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5222 /* High bits of dev->flags are used to record warm plug
5223 * requests which occur asynchronously. Synchronize using
5226 spin_lock_irqsave(ap
->lock
, flags
);
5227 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5229 spin_unlock_irqrestore(ap
->lock
, flags
);
5231 memset((void *)dev
+ ATA_DEVICE_CLEAR_OFFSET
, 0,
5232 sizeof(*dev
) - ATA_DEVICE_CLEAR_OFFSET
);
5233 dev
->pio_mask
= UINT_MAX
;
5234 dev
->mwdma_mask
= UINT_MAX
;
5235 dev
->udma_mask
= UINT_MAX
;
5239 * ata_link_init - Initialize an ata_link structure
5240 * @ap: ATA port link is attached to
5241 * @link: Link structure to initialize
5242 * @pmp: Port multiplier port number
5247 * Kernel thread context (may sleep)
5249 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5253 /* clear everything except for devices */
5254 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
5258 link
->active_tag
= ATA_TAG_POISON
;
5259 link
->hw_sata_spd_limit
= UINT_MAX
;
5261 /* can't use iterator, ap isn't initialized yet */
5262 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5263 struct ata_device
*dev
= &link
->device
[i
];
5266 dev
->devno
= dev
- link
->device
;
5272 * sata_link_init_spd - Initialize link->sata_spd_limit
5273 * @link: Link to configure sata_spd_limit for
5275 * Initialize @link->[hw_]sata_spd_limit to the currently
5279 * Kernel thread context (may sleep).
5282 * 0 on success, -errno on failure.
5284 int sata_link_init_spd(struct ata_link
*link
)
5289 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5293 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5295 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5297 ata_force_link_limits(link
);
5299 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5305 * ata_port_alloc - allocate and initialize basic ATA port resources
5306 * @host: ATA host this allocated port belongs to
5308 * Allocate and initialize basic ATA port resources.
5311 * Allocate ATA port on success, NULL on failure.
5314 * Inherited from calling layer (may sleep).
5316 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5318 struct ata_port
*ap
;
5322 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5326 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5327 ap
->lock
= &host
->lock
;
5328 ap
->flags
= ATA_FLAG_DISABLED
;
5330 ap
->ctl
= ATA_DEVCTL_OBS
;
5332 ap
->dev
= host
->dev
;
5333 ap
->last_ctl
= 0xFF;
5335 #if defined(ATA_VERBOSE_DEBUG)
5336 /* turn on all debugging levels */
5337 ap
->msg_enable
= 0x00FF;
5338 #elif defined(ATA_DEBUG)
5339 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5341 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5344 #ifdef CONFIG_ATA_SFF
5345 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
5347 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5349 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5350 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5351 INIT_LIST_HEAD(&ap
->eh_done_q
);
5352 init_waitqueue_head(&ap
->eh_wait_q
);
5353 init_timer_deferrable(&ap
->fastdrain_timer
);
5354 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5355 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5357 ap
->cbl
= ATA_CBL_NONE
;
5359 ata_link_init(ap
, &ap
->link
, 0);
5362 ap
->stats
.unhandled_irq
= 1;
5363 ap
->stats
.idle_irq
= 1;
5368 static void ata_host_release(struct device
*gendev
, void *res
)
5370 struct ata_host
*host
= dev_get_drvdata(gendev
);
5373 for (i
= 0; i
< host
->n_ports
; i
++) {
5374 struct ata_port
*ap
= host
->ports
[i
];
5380 scsi_host_put(ap
->scsi_host
);
5382 kfree(ap
->pmp_link
);
5384 host
->ports
[i
] = NULL
;
5387 dev_set_drvdata(gendev
, NULL
);
5391 * ata_host_alloc - allocate and init basic ATA host resources
5392 * @dev: generic device this host is associated with
5393 * @max_ports: maximum number of ATA ports associated with this host
5395 * Allocate and initialize basic ATA host resources. LLD calls
5396 * this function to allocate a host, initializes it fully and
5397 * attaches it using ata_host_register().
5399 * @max_ports ports are allocated and host->n_ports is
5400 * initialized to @max_ports. The caller is allowed to decrease
5401 * host->n_ports before calling ata_host_register(). The unused
5402 * ports will be automatically freed on registration.
5405 * Allocate ATA host on success, NULL on failure.
5408 * Inherited from calling layer (may sleep).
5410 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5412 struct ata_host
*host
;
5418 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5421 /* alloc a container for our list of ATA ports (buses) */
5422 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5423 /* alloc a container for our list of ATA ports (buses) */
5424 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5428 devres_add(dev
, host
);
5429 dev_set_drvdata(dev
, host
);
5431 spin_lock_init(&host
->lock
);
5433 host
->n_ports
= max_ports
;
5435 /* allocate ports bound to this host */
5436 for (i
= 0; i
< max_ports
; i
++) {
5437 struct ata_port
*ap
;
5439 ap
= ata_port_alloc(host
);
5444 host
->ports
[i
] = ap
;
5447 devres_remove_group(dev
, NULL
);
5451 devres_release_group(dev
, NULL
);
5456 * ata_host_alloc_pinfo - alloc host and init with port_info array
5457 * @dev: generic device this host is associated with
5458 * @ppi: array of ATA port_info to initialize host with
5459 * @n_ports: number of ATA ports attached to this host
5461 * Allocate ATA host and initialize with info from @ppi. If NULL
5462 * terminated, @ppi may contain fewer entries than @n_ports. The
5463 * last entry will be used for the remaining ports.
5466 * Allocate ATA host on success, NULL on failure.
5469 * Inherited from calling layer (may sleep).
5471 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5472 const struct ata_port_info
* const * ppi
,
5475 const struct ata_port_info
*pi
;
5476 struct ata_host
*host
;
5479 host
= ata_host_alloc(dev
, n_ports
);
5483 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5484 struct ata_port
*ap
= host
->ports
[i
];
5489 ap
->pio_mask
= pi
->pio_mask
;
5490 ap
->mwdma_mask
= pi
->mwdma_mask
;
5491 ap
->udma_mask
= pi
->udma_mask
;
5492 ap
->flags
|= pi
->flags
;
5493 ap
->link
.flags
|= pi
->link_flags
;
5494 ap
->ops
= pi
->port_ops
;
5496 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5497 host
->ops
= pi
->port_ops
;
5503 static void ata_host_stop(struct device
*gendev
, void *res
)
5505 struct ata_host
*host
= dev_get_drvdata(gendev
);
5508 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5510 for (i
= 0; i
< host
->n_ports
; i
++) {
5511 struct ata_port
*ap
= host
->ports
[i
];
5513 if (ap
->ops
->port_stop
)
5514 ap
->ops
->port_stop(ap
);
5517 if (host
->ops
->host_stop
)
5518 host
->ops
->host_stop(host
);
5522 * ata_finalize_port_ops - finalize ata_port_operations
5523 * @ops: ata_port_operations to finalize
5525 * An ata_port_operations can inherit from another ops and that
5526 * ops can again inherit from another. This can go on as many
5527 * times as necessary as long as there is no loop in the
5528 * inheritance chain.
5530 * Ops tables are finalized when the host is started. NULL or
5531 * unspecified entries are inherited from the closet ancestor
5532 * which has the method and the entry is populated with it.
5533 * After finalization, the ops table directly points to all the
5534 * methods and ->inherits is no longer necessary and cleared.
5536 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5541 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5543 static DEFINE_SPINLOCK(lock
);
5544 const struct ata_port_operations
*cur
;
5545 void **begin
= (void **)ops
;
5546 void **end
= (void **)&ops
->inherits
;
5549 if (!ops
|| !ops
->inherits
)
5554 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5555 void **inherit
= (void **)cur
;
5557 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5562 for (pp
= begin
; pp
< end
; pp
++)
5566 ops
->inherits
= NULL
;
5572 * ata_host_start - start and freeze ports of an ATA host
5573 * @host: ATA host to start ports for
5575 * Start and then freeze ports of @host. Started status is
5576 * recorded in host->flags, so this function can be called
5577 * multiple times. Ports are guaranteed to get started only
5578 * once. If host->ops isn't initialized yet, its set to the
5579 * first non-dummy port ops.
5582 * Inherited from calling layer (may sleep).
5585 * 0 if all ports are started successfully, -errno otherwise.
5587 int ata_host_start(struct ata_host
*host
)
5590 void *start_dr
= NULL
;
5593 if (host
->flags
& ATA_HOST_STARTED
)
5596 ata_finalize_port_ops(host
->ops
);
5598 for (i
= 0; i
< host
->n_ports
; i
++) {
5599 struct ata_port
*ap
= host
->ports
[i
];
5601 ata_finalize_port_ops(ap
->ops
);
5603 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5604 host
->ops
= ap
->ops
;
5606 if (ap
->ops
->port_stop
)
5610 if (host
->ops
->host_stop
)
5614 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5619 for (i
= 0; i
< host
->n_ports
; i
++) {
5620 struct ata_port
*ap
= host
->ports
[i
];
5622 if (ap
->ops
->port_start
) {
5623 rc
= ap
->ops
->port_start(ap
);
5626 dev_printk(KERN_ERR
, host
->dev
,
5627 "failed to start port %d "
5628 "(errno=%d)\n", i
, rc
);
5632 ata_eh_freeze_port(ap
);
5636 devres_add(host
->dev
, start_dr
);
5637 host
->flags
|= ATA_HOST_STARTED
;
5642 struct ata_port
*ap
= host
->ports
[i
];
5644 if (ap
->ops
->port_stop
)
5645 ap
->ops
->port_stop(ap
);
5647 devres_free(start_dr
);
5652 * ata_sas_host_init - Initialize a host struct
5653 * @host: host to initialize
5654 * @dev: device host is attached to
5655 * @flags: host flags
5659 * PCI/etc. bus probe sem.
5662 /* KILLME - the only user left is ipr */
5663 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5664 unsigned long flags
, struct ata_port_operations
*ops
)
5666 spin_lock_init(&host
->lock
);
5668 host
->flags
= flags
;
5673 * ata_host_register - register initialized ATA host
5674 * @host: ATA host to register
5675 * @sht: template for SCSI host
5677 * Register initialized ATA host. @host is allocated using
5678 * ata_host_alloc() and fully initialized by LLD. This function
5679 * starts ports, registers @host with ATA and SCSI layers and
5680 * probe registered devices.
5683 * Inherited from calling layer (may sleep).
5686 * 0 on success, -errno otherwise.
5688 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
5692 /* host must have been started */
5693 if (!(host
->flags
& ATA_HOST_STARTED
)) {
5694 dev_printk(KERN_ERR
, host
->dev
,
5695 "BUG: trying to register unstarted host\n");
5700 /* Blow away unused ports. This happens when LLD can't
5701 * determine the exact number of ports to allocate at
5704 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
5705 kfree(host
->ports
[i
]);
5707 /* give ports names and add SCSI hosts */
5708 for (i
= 0; i
< host
->n_ports
; i
++)
5709 host
->ports
[i
]->print_id
= ata_print_id
++;
5711 rc
= ata_scsi_add_hosts(host
, sht
);
5715 /* associate with ACPI nodes */
5716 ata_acpi_associate(host
);
5718 /* set cable, sata_spd_limit and report */
5719 for (i
= 0; i
< host
->n_ports
; i
++) {
5720 struct ata_port
*ap
= host
->ports
[i
];
5721 unsigned long xfer_mask
;
5723 /* set SATA cable type if still unset */
5724 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
5725 ap
->cbl
= ATA_CBL_SATA
;
5727 /* init sata_spd_limit to the current value */
5728 sata_link_init_spd(&ap
->link
);
5730 /* print per-port info to dmesg */
5731 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
5734 if (!ata_port_is_dummy(ap
)) {
5735 ata_port_printk(ap
, KERN_INFO
,
5736 "%cATA max %s %s\n",
5737 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
5738 ata_mode_string(xfer_mask
),
5739 ap
->link
.eh_info
.desc
);
5740 ata_ehi_clear_desc(&ap
->link
.eh_info
);
5742 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
5745 /* perform each probe synchronously */
5746 DPRINTK("probe begin\n");
5747 for (i
= 0; i
< host
->n_ports
; i
++) {
5748 struct ata_port
*ap
= host
->ports
[i
];
5751 if (ap
->ops
->error_handler
) {
5752 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5753 unsigned long flags
;
5757 /* kick EH for boot probing */
5758 spin_lock_irqsave(ap
->lock
, flags
);
5760 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5761 ehi
->action
|= ATA_EH_RESET
| ATA_EH_LPM
;
5762 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5764 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5765 ap
->pflags
|= ATA_PFLAG_LOADING
;
5766 ata_port_schedule_eh(ap
);
5768 spin_unlock_irqrestore(ap
->lock
, flags
);
5770 /* wait for EH to finish */
5771 ata_port_wait_eh(ap
);
5773 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5774 rc
= ata_bus_probe(ap
);
5775 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5778 /* FIXME: do something useful here?
5779 * Current libata behavior will
5780 * tear down everything when
5781 * the module is removed
5782 * or the h/w is unplugged.
5788 /* probes are done, now scan each port's disk(s) */
5789 DPRINTK("host probe begin\n");
5790 for (i
= 0; i
< host
->n_ports
; i
++) {
5791 struct ata_port
*ap
= host
->ports
[i
];
5793 ata_scsi_scan_host(ap
, 1);
5800 * ata_host_activate - start host, request IRQ and register it
5801 * @host: target ATA host
5802 * @irq: IRQ to request
5803 * @irq_handler: irq_handler used when requesting IRQ
5804 * @irq_flags: irq_flags used when requesting IRQ
5805 * @sht: scsi_host_template to use when registering the host
5807 * After allocating an ATA host and initializing it, most libata
5808 * LLDs perform three steps to activate the host - start host,
5809 * request IRQ and register it. This helper takes necessasry
5810 * arguments and performs the three steps in one go.
5812 * An invalid IRQ skips the IRQ registration and expects the host to
5813 * have set polling mode on the port. In this case, @irq_handler
5817 * Inherited from calling layer (may sleep).
5820 * 0 on success, -errno otherwise.
5822 int ata_host_activate(struct ata_host
*host
, int irq
,
5823 irq_handler_t irq_handler
, unsigned long irq_flags
,
5824 struct scsi_host_template
*sht
)
5828 rc
= ata_host_start(host
);
5832 /* Special case for polling mode */
5834 WARN_ON(irq_handler
);
5835 return ata_host_register(host
, sht
);
5838 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
5839 dev_driver_string(host
->dev
), host
);
5843 for (i
= 0; i
< host
->n_ports
; i
++)
5844 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
5846 rc
= ata_host_register(host
, sht
);
5847 /* if failed, just free the IRQ and leave ports alone */
5849 devm_free_irq(host
->dev
, irq
, host
);
5855 * ata_port_detach - Detach ATA port in prepration of device removal
5856 * @ap: ATA port to be detached
5858 * Detach all ATA devices and the associated SCSI devices of @ap;
5859 * then, remove the associated SCSI host. @ap is guaranteed to
5860 * be quiescent on return from this function.
5863 * Kernel thread context (may sleep).
5865 static void ata_port_detach(struct ata_port
*ap
)
5867 unsigned long flags
;
5868 struct ata_link
*link
;
5869 struct ata_device
*dev
;
5871 if (!ap
->ops
->error_handler
)
5874 /* tell EH we're leaving & flush EH */
5875 spin_lock_irqsave(ap
->lock
, flags
);
5876 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
5877 spin_unlock_irqrestore(ap
->lock
, flags
);
5879 ata_port_wait_eh(ap
);
5881 /* EH is now guaranteed to see UNLOADING - EH context belongs
5882 * to us. Restore SControl and disable all existing devices.
5884 __ata_port_for_each_link(link
, ap
) {
5885 sata_scr_write(link
, SCR_CONTROL
, link
->saved_scontrol
);
5886 ata_link_for_each_dev(dev
, link
)
5887 ata_dev_disable(dev
);
5890 /* Final freeze & EH. All in-flight commands are aborted. EH
5891 * will be skipped and retrials will be terminated with bad
5894 spin_lock_irqsave(ap
->lock
, flags
);
5895 ata_port_freeze(ap
); /* won't be thawed */
5896 spin_unlock_irqrestore(ap
->lock
, flags
);
5898 ata_port_wait_eh(ap
);
5899 cancel_rearming_delayed_work(&ap
->hotplug_task
);
5902 /* remove the associated SCSI host */
5903 scsi_remove_host(ap
->scsi_host
);
5907 * ata_host_detach - Detach all ports of an ATA host
5908 * @host: Host to detach
5910 * Detach all ports of @host.
5913 * Kernel thread context (may sleep).
5915 void ata_host_detach(struct ata_host
*host
)
5919 for (i
= 0; i
< host
->n_ports
; i
++)
5920 ata_port_detach(host
->ports
[i
]);
5922 /* the host is dead now, dissociate ACPI */
5923 ata_acpi_dissociate(host
);
5929 * ata_pci_remove_one - PCI layer callback for device removal
5930 * @pdev: PCI device that was removed
5932 * PCI layer indicates to libata via this hook that hot-unplug or
5933 * module unload event has occurred. Detach all ports. Resource
5934 * release is handled via devres.
5937 * Inherited from PCI layer (may sleep).
5939 void ata_pci_remove_one(struct pci_dev
*pdev
)
5941 struct device
*dev
= &pdev
->dev
;
5942 struct ata_host
*host
= dev_get_drvdata(dev
);
5944 ata_host_detach(host
);
5947 /* move to PCI subsystem */
5948 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5950 unsigned long tmp
= 0;
5952 switch (bits
->width
) {
5955 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5961 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5967 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5978 return (tmp
== bits
->val
) ? 1 : 0;
5982 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
5984 pci_save_state(pdev
);
5985 pci_disable_device(pdev
);
5987 if (mesg
.event
& PM_EVENT_SLEEP
)
5988 pci_set_power_state(pdev
, PCI_D3hot
);
5991 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
5995 pci_set_power_state(pdev
, PCI_D0
);
5996 pci_restore_state(pdev
);
5998 rc
= pcim_enable_device(pdev
);
6000 dev_printk(KERN_ERR
, &pdev
->dev
,
6001 "failed to enable device after resume (%d)\n", rc
);
6005 pci_set_master(pdev
);
6009 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6011 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6014 rc
= ata_host_suspend(host
, mesg
);
6018 ata_pci_device_do_suspend(pdev
, mesg
);
6023 int ata_pci_device_resume(struct pci_dev
*pdev
)
6025 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6028 rc
= ata_pci_device_do_resume(pdev
);
6030 ata_host_resume(host
);
6033 #endif /* CONFIG_PM */
6035 #endif /* CONFIG_PCI */
6037 static int __init
ata_parse_force_one(char **cur
,
6038 struct ata_force_ent
*force_ent
,
6039 const char **reason
)
6041 /* FIXME: Currently, there's no way to tag init const data and
6042 * using __initdata causes build failure on some versions of
6043 * gcc. Once __initdataconst is implemented, add const to the
6044 * following structure.
6046 static struct ata_force_param force_tbl
[] __initdata
= {
6047 { "40c", .cbl
= ATA_CBL_PATA40
},
6048 { "80c", .cbl
= ATA_CBL_PATA80
},
6049 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6050 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6051 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6052 { "sata", .cbl
= ATA_CBL_SATA
},
6053 { "1.5Gbps", .spd_limit
= 1 },
6054 { "3.0Gbps", .spd_limit
= 2 },
6055 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6056 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6057 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6058 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6059 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6060 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6061 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6062 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6063 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6064 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6065 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6066 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6067 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6068 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6069 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6070 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6071 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6072 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6073 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6074 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6075 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6076 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6077 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6078 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6079 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6080 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6081 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6082 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6083 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6084 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6085 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6086 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6087 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6088 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6089 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6090 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6091 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6092 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6093 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6095 char *start
= *cur
, *p
= *cur
;
6096 char *id
, *val
, *endp
;
6097 const struct ata_force_param
*match_fp
= NULL
;
6098 int nr_matches
= 0, i
;
6100 /* find where this param ends and update *cur */
6101 while (*p
!= '\0' && *p
!= ',')
6112 p
= strchr(start
, ':');
6114 val
= strstrip(start
);
6119 id
= strstrip(start
);
6120 val
= strstrip(p
+ 1);
6123 p
= strchr(id
, '.');
6126 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6127 if (p
== endp
|| *endp
!= '\0') {
6128 *reason
= "invalid device";
6133 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6134 if (p
== endp
|| *endp
!= '\0') {
6135 *reason
= "invalid port/link";
6140 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6141 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6142 const struct ata_force_param
*fp
= &force_tbl
[i
];
6144 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6150 if (strcasecmp(val
, fp
->name
) == 0) {
6157 *reason
= "unknown value";
6160 if (nr_matches
> 1) {
6161 *reason
= "ambigious value";
6165 force_ent
->param
= *match_fp
;
6170 static void __init
ata_parse_force_param(void)
6172 int idx
= 0, size
= 1;
6173 int last_port
= -1, last_device
= -1;
6174 char *p
, *cur
, *next
;
6176 /* calculate maximum number of params and allocate force_tbl */
6177 for (p
= ata_force_param_buf
; *p
; p
++)
6181 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6182 if (!ata_force_tbl
) {
6183 printk(KERN_WARNING
"ata: failed to extend force table, "
6184 "libata.force ignored\n");
6188 /* parse and populate the table */
6189 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6190 const char *reason
= "";
6191 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6194 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6195 printk(KERN_WARNING
"ata: failed to parse force "
6196 "parameter \"%s\" (%s)\n",
6201 if (te
.port
== -1) {
6202 te
.port
= last_port
;
6203 te
.device
= last_device
;
6206 ata_force_tbl
[idx
++] = te
;
6208 last_port
= te
.port
;
6209 last_device
= te
.device
;
6212 ata_force_tbl_size
= idx
;
6215 static int __init
ata_init(void)
6217 ata_parse_force_param();
6219 ata_wq
= create_workqueue("ata");
6221 goto free_force_tbl
;
6223 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6227 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6231 destroy_workqueue(ata_wq
);
6233 kfree(ata_force_tbl
);
6237 static void __exit
ata_exit(void)
6239 kfree(ata_force_tbl
);
6240 destroy_workqueue(ata_wq
);
6241 destroy_workqueue(ata_aux_wq
);
6244 subsys_initcall(ata_init
);
6245 module_exit(ata_exit
);
6247 static unsigned long ratelimit_time
;
6248 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6250 int ata_ratelimit(void)
6253 unsigned long flags
;
6255 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6257 if (time_after(jiffies
, ratelimit_time
)) {
6259 ratelimit_time
= jiffies
+ (HZ
/5);
6263 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6269 * ata_wait_register - wait until register value changes
6270 * @reg: IO-mapped register
6271 * @mask: Mask to apply to read register value
6272 * @val: Wait condition
6273 * @interval: polling interval in milliseconds
6274 * @timeout: timeout in milliseconds
6276 * Waiting for some bits of register to change is a common
6277 * operation for ATA controllers. This function reads 32bit LE
6278 * IO-mapped register @reg and tests for the following condition.
6280 * (*@reg & mask) != val
6282 * If the condition is met, it returns; otherwise, the process is
6283 * repeated after @interval_msec until timeout.
6286 * Kernel thread context (may sleep)
6289 * The final register value.
6291 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6292 unsigned long interval
, unsigned long timeout
)
6294 unsigned long deadline
;
6297 tmp
= ioread32(reg
);
6299 /* Calculate timeout _after_ the first read to make sure
6300 * preceding writes reach the controller before starting to
6301 * eat away the timeout.
6303 deadline
= ata_deadline(jiffies
, timeout
);
6305 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6307 tmp
= ioread32(reg
);
6316 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6318 return AC_ERR_SYSTEM
;
6321 static void ata_dummy_error_handler(struct ata_port
*ap
)
6326 struct ata_port_operations ata_dummy_port_ops
= {
6327 .qc_prep
= ata_noop_qc_prep
,
6328 .qc_issue
= ata_dummy_qc_issue
,
6329 .error_handler
= ata_dummy_error_handler
,
6332 const struct ata_port_info ata_dummy_port_info
= {
6333 .port_ops
= &ata_dummy_port_ops
,
6337 * libata is essentially a library of internal helper functions for
6338 * low-level ATA host controller drivers. As such, the API/ABI is
6339 * likely to change as new drivers are added and updated.
6340 * Do not depend on ABI/API stability.
6342 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6343 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6344 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6345 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6346 EXPORT_SYMBOL_GPL(sata_port_ops
);
6347 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6348 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6349 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6350 EXPORT_SYMBOL_GPL(ata_host_init
);
6351 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6352 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6353 EXPORT_SYMBOL_GPL(ata_host_start
);
6354 EXPORT_SYMBOL_GPL(ata_host_register
);
6355 EXPORT_SYMBOL_GPL(ata_host_activate
);
6356 EXPORT_SYMBOL_GPL(ata_host_detach
);
6357 EXPORT_SYMBOL_GPL(ata_sg_init
);
6358 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6359 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6360 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6361 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6362 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6363 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6364 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6365 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6366 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6367 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6368 EXPORT_SYMBOL_GPL(ata_mode_string
);
6369 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6370 EXPORT_SYMBOL_GPL(ata_port_start
);
6371 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6372 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6373 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6374 EXPORT_SYMBOL_GPL(ata_port_probe
);
6375 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6376 EXPORT_SYMBOL_GPL(sata_set_spd
);
6377 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6378 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6379 EXPORT_SYMBOL_GPL(sata_link_resume
);
6380 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6381 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6382 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6383 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6384 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6385 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6386 EXPORT_SYMBOL_GPL(ata_port_disable
);
6387 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6388 EXPORT_SYMBOL_GPL(ata_wait_register
);
6389 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
6390 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6391 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6392 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6393 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6394 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6395 EXPORT_SYMBOL_GPL(sata_scr_read
);
6396 EXPORT_SYMBOL_GPL(sata_scr_write
);
6397 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6398 EXPORT_SYMBOL_GPL(ata_link_online
);
6399 EXPORT_SYMBOL_GPL(ata_link_offline
);
6401 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6402 EXPORT_SYMBOL_GPL(ata_host_resume
);
6403 #endif /* CONFIG_PM */
6404 EXPORT_SYMBOL_GPL(ata_id_string
);
6405 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6406 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6407 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6409 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6410 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6411 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6412 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6413 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6416 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6417 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6419 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6420 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6421 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6422 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6423 #endif /* CONFIG_PM */
6424 #endif /* CONFIG_PCI */
6426 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6427 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6428 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6429 EXPORT_SYMBOL_GPL(ata_port_desc
);
6431 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6432 #endif /* CONFIG_PCI */
6433 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6434 EXPORT_SYMBOL_GPL(ata_link_abort
);
6435 EXPORT_SYMBOL_GPL(ata_port_abort
);
6436 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6437 EXPORT_SYMBOL_GPL(sata_async_notification
);
6438 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6439 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6440 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6441 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6442 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6443 EXPORT_SYMBOL_GPL(ata_do_eh
);
6444 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6446 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6447 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6448 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6449 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6450 EXPORT_SYMBOL_GPL(ata_cable_sata
);