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 <linux/async.h>
60 #include <linux/log2.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_host.h>
64 #include <linux/libata.h>
65 #include <asm/byteorder.h>
66 #include <linux/cdrom.h>
71 /* debounce timing parameters in msecs { interval, duration, timeout } */
72 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
73 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
74 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
76 const struct ata_port_operations ata_base_port_ops
= {
77 .prereset
= ata_std_prereset
,
78 .postreset
= ata_std_postreset
,
79 .error_handler
= ata_std_error_handler
,
82 const struct ata_port_operations sata_port_ops
= {
83 .inherits
= &ata_base_port_ops
,
85 .qc_defer
= ata_std_qc_defer
,
86 .hardreset
= sata_std_hardreset
,
89 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
90 u16 heads
, u16 sectors
);
91 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
92 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
93 u8 enable
, u8 feature
);
94 static void ata_dev_xfermask(struct ata_device
*dev
);
95 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
97 unsigned int ata_print_id
= 1;
98 static struct workqueue_struct
*ata_wq
;
100 struct workqueue_struct
*ata_aux_wq
;
102 struct ata_force_param
{
106 unsigned long xfer_mask
;
107 unsigned int horkage_on
;
108 unsigned int horkage_off
;
112 struct ata_force_ent
{
115 struct ata_force_param param
;
118 static struct ata_force_ent
*ata_force_tbl
;
119 static int ata_force_tbl_size
;
121 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
122 /* param_buf is thrown away after initialization, disallow read */
123 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
124 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
126 static int atapi_enabled
= 1;
127 module_param(atapi_enabled
, int, 0444);
128 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
130 static int atapi_dmadir
= 0;
131 module_param(atapi_dmadir
, int, 0444);
132 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
134 int atapi_passthru16
= 1;
135 module_param(atapi_passthru16
, int, 0444);
136 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
139 module_param_named(fua
, libata_fua
, int, 0444);
140 MODULE_PARM_DESC(fua
, "FUA support (0=off, 1=on)");
142 static int ata_ignore_hpa
;
143 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
144 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
146 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
147 module_param_named(dma
, libata_dma_mask
, int, 0444);
148 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
150 static int ata_probe_timeout
;
151 module_param(ata_probe_timeout
, int, 0444);
152 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
154 int libata_noacpi
= 0;
155 module_param_named(noacpi
, libata_noacpi
, int, 0444);
156 MODULE_PARM_DESC(noacpi
, "Disables the use of ACPI in probe/suspend/resume when set");
158 int libata_allow_tpm
= 0;
159 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
160 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands");
162 MODULE_AUTHOR("Jeff Garzik");
163 MODULE_DESCRIPTION("Library module for ATA devices");
164 MODULE_LICENSE("GPL");
165 MODULE_VERSION(DRV_VERSION
);
168 static bool ata_sstatus_online(u32 sstatus
)
170 return (sstatus
& 0xf) == 0x3;
174 * ata_link_next - link iteration helper
175 * @link: the previous link, NULL to start
176 * @ap: ATA port containing links to iterate
177 * @mode: iteration mode, one of ATA_LITER_*
180 * Host lock or EH context.
183 * Pointer to the next link.
185 struct ata_link
*ata_link_next(struct ata_link
*link
, struct ata_port
*ap
,
186 enum ata_link_iter_mode mode
)
188 BUG_ON(mode
!= ATA_LITER_EDGE
&&
189 mode
!= ATA_LITER_PMP_FIRST
&& mode
!= ATA_LITER_HOST_FIRST
);
191 /* NULL link indicates start of iteration */
195 case ATA_LITER_PMP_FIRST
:
196 if (sata_pmp_attached(ap
))
199 case ATA_LITER_HOST_FIRST
:
203 /* we just iterated over the host link, what's next? */
204 if (link
== &ap
->link
)
206 case ATA_LITER_HOST_FIRST
:
207 if (sata_pmp_attached(ap
))
210 case ATA_LITER_PMP_FIRST
:
211 if (unlikely(ap
->slave_link
))
212 return ap
->slave_link
;
218 /* slave_link excludes PMP */
219 if (unlikely(link
== ap
->slave_link
))
222 /* we were over a PMP link */
223 if (++link
< ap
->pmp_link
+ ap
->nr_pmp_links
)
226 if (mode
== ATA_LITER_PMP_FIRST
)
233 * ata_dev_next - device iteration helper
234 * @dev: the previous device, NULL to start
235 * @link: ATA link containing devices to iterate
236 * @mode: iteration mode, one of ATA_DITER_*
239 * Host lock or EH context.
242 * Pointer to the next device.
244 struct ata_device
*ata_dev_next(struct ata_device
*dev
, struct ata_link
*link
,
245 enum ata_dev_iter_mode mode
)
247 BUG_ON(mode
!= ATA_DITER_ENABLED
&& mode
!= ATA_DITER_ENABLED_REVERSE
&&
248 mode
!= ATA_DITER_ALL
&& mode
!= ATA_DITER_ALL_REVERSE
);
250 /* NULL dev indicates start of iteration */
253 case ATA_DITER_ENABLED
:
257 case ATA_DITER_ENABLED_REVERSE
:
258 case ATA_DITER_ALL_REVERSE
:
259 dev
= link
->device
+ ata_link_max_devices(link
) - 1;
264 /* move to the next one */
266 case ATA_DITER_ENABLED
:
268 if (++dev
< link
->device
+ ata_link_max_devices(link
))
271 case ATA_DITER_ENABLED_REVERSE
:
272 case ATA_DITER_ALL_REVERSE
:
273 if (--dev
>= link
->device
)
279 if ((mode
== ATA_DITER_ENABLED
|| mode
== ATA_DITER_ENABLED_REVERSE
) &&
280 !ata_dev_enabled(dev
))
286 * ata_dev_phys_link - find physical link for a device
287 * @dev: ATA device to look up physical link for
289 * Look up physical link which @dev is attached to. Note that
290 * this is different from @dev->link only when @dev is on slave
291 * link. For all other cases, it's the same as @dev->link.
297 * Pointer to the found physical link.
299 struct ata_link
*ata_dev_phys_link(struct ata_device
*dev
)
301 struct ata_port
*ap
= dev
->link
->ap
;
307 return ap
->slave_link
;
311 * ata_force_cbl - force cable type according to libata.force
312 * @ap: ATA port of interest
314 * Force cable type according to libata.force and whine about it.
315 * The last entry which has matching port number is used, so it
316 * can be specified as part of device force parameters. For
317 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
323 void ata_force_cbl(struct ata_port
*ap
)
327 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
328 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
330 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
333 if (fe
->param
.cbl
== ATA_CBL_NONE
)
336 ap
->cbl
= fe
->param
.cbl
;
337 ata_port_printk(ap
, KERN_NOTICE
,
338 "FORCE: cable set to %s\n", fe
->param
.name
);
344 * ata_force_link_limits - force link limits according to libata.force
345 * @link: ATA link of interest
347 * Force link flags and SATA spd limit according to libata.force
348 * and whine about it. When only the port part is specified
349 * (e.g. 1:), the limit applies to all links connected to both
350 * the host link and all fan-out ports connected via PMP. If the
351 * device part is specified as 0 (e.g. 1.00:), it specifies the
352 * first fan-out link not the host link. Device number 15 always
353 * points to the host link whether PMP is attached or not. If the
354 * controller has slave link, device number 16 points to it.
359 static void ata_force_link_limits(struct ata_link
*link
)
361 bool did_spd
= false;
362 int linkno
= link
->pmp
;
365 if (ata_is_host_link(link
))
368 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
369 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
371 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
374 if (fe
->device
!= -1 && fe
->device
!= linkno
)
377 /* only honor the first spd limit */
378 if (!did_spd
&& fe
->param
.spd_limit
) {
379 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
380 ata_link_printk(link
, KERN_NOTICE
,
381 "FORCE: PHY spd limit set to %s\n",
386 /* let lflags stack */
387 if (fe
->param
.lflags
) {
388 link
->flags
|= fe
->param
.lflags
;
389 ata_link_printk(link
, KERN_NOTICE
,
390 "FORCE: link flag 0x%x forced -> 0x%x\n",
391 fe
->param
.lflags
, link
->flags
);
397 * ata_force_xfermask - force xfermask according to libata.force
398 * @dev: ATA device of interest
400 * Force xfer_mask according to libata.force and whine about it.
401 * For consistency with link selection, device number 15 selects
402 * the first device connected to the host link.
407 static void ata_force_xfermask(struct ata_device
*dev
)
409 int devno
= dev
->link
->pmp
+ dev
->devno
;
410 int alt_devno
= devno
;
413 /* allow n.15/16 for devices attached to host port */
414 if (ata_is_host_link(dev
->link
))
417 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
418 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
419 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
421 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
424 if (fe
->device
!= -1 && fe
->device
!= devno
&&
425 fe
->device
!= alt_devno
)
428 if (!fe
->param
.xfer_mask
)
431 ata_unpack_xfermask(fe
->param
.xfer_mask
,
432 &pio_mask
, &mwdma_mask
, &udma_mask
);
434 dev
->udma_mask
= udma_mask
;
435 else if (mwdma_mask
) {
437 dev
->mwdma_mask
= mwdma_mask
;
441 dev
->pio_mask
= pio_mask
;
444 ata_dev_printk(dev
, KERN_NOTICE
,
445 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
451 * ata_force_horkage - force horkage according to libata.force
452 * @dev: ATA device of interest
454 * Force horkage according to libata.force and whine about it.
455 * For consistency with link selection, device number 15 selects
456 * the first device connected to the host link.
461 static void ata_force_horkage(struct ata_device
*dev
)
463 int devno
= dev
->link
->pmp
+ dev
->devno
;
464 int alt_devno
= devno
;
467 /* allow n.15/16 for devices attached to host port */
468 if (ata_is_host_link(dev
->link
))
471 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
472 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
474 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
477 if (fe
->device
!= -1 && fe
->device
!= devno
&&
478 fe
->device
!= alt_devno
)
481 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
482 !(dev
->horkage
& fe
->param
.horkage_off
))
485 dev
->horkage
|= fe
->param
.horkage_on
;
486 dev
->horkage
&= ~fe
->param
.horkage_off
;
488 ata_dev_printk(dev
, KERN_NOTICE
,
489 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
494 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
495 * @opcode: SCSI opcode
497 * Determine ATAPI command type from @opcode.
503 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
505 int atapi_cmd_type(u8 opcode
)
514 case GPCMD_WRITE_AND_VERIFY_10
:
518 case GPCMD_READ_CD_MSF
:
519 return ATAPI_READ_CD
;
523 if (atapi_passthru16
)
524 return ATAPI_PASS_THRU
;
532 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
533 * @tf: Taskfile to convert
534 * @pmp: Port multiplier port
535 * @is_cmd: This FIS is for command
536 * @fis: Buffer into which data will output
538 * Converts a standard ATA taskfile to a Serial ATA
539 * FIS structure (Register - Host to Device).
542 * Inherited from caller.
544 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
546 fis
[0] = 0x27; /* Register - Host to Device FIS */
547 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
549 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
551 fis
[2] = tf
->command
;
552 fis
[3] = tf
->feature
;
559 fis
[8] = tf
->hob_lbal
;
560 fis
[9] = tf
->hob_lbam
;
561 fis
[10] = tf
->hob_lbah
;
562 fis
[11] = tf
->hob_feature
;
565 fis
[13] = tf
->hob_nsect
;
576 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
577 * @fis: Buffer from which data will be input
578 * @tf: Taskfile to output
580 * Converts a serial ATA FIS structure to a standard ATA taskfile.
583 * Inherited from caller.
586 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
588 tf
->command
= fis
[2]; /* status */
589 tf
->feature
= fis
[3]; /* error */
596 tf
->hob_lbal
= fis
[8];
597 tf
->hob_lbam
= fis
[9];
598 tf
->hob_lbah
= fis
[10];
601 tf
->hob_nsect
= fis
[13];
604 static const u8 ata_rw_cmds
[] = {
608 ATA_CMD_READ_MULTI_EXT
,
609 ATA_CMD_WRITE_MULTI_EXT
,
613 ATA_CMD_WRITE_MULTI_FUA_EXT
,
617 ATA_CMD_PIO_READ_EXT
,
618 ATA_CMD_PIO_WRITE_EXT
,
631 ATA_CMD_WRITE_FUA_EXT
635 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
636 * @tf: command to examine and configure
637 * @dev: device tf belongs to
639 * Examine the device configuration and tf->flags to calculate
640 * the proper read/write commands and protocol to use.
645 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
649 int index
, fua
, lba48
, write
;
651 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
652 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
653 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
655 if (dev
->flags
& ATA_DFLAG_PIO
) {
656 tf
->protocol
= ATA_PROT_PIO
;
657 index
= dev
->multi_count
? 0 : 8;
658 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
659 /* Unable to use DMA due to host limitation */
660 tf
->protocol
= ATA_PROT_PIO
;
661 index
= dev
->multi_count
? 0 : 8;
663 tf
->protocol
= ATA_PROT_DMA
;
667 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
676 * ata_tf_read_block - Read block address from ATA taskfile
677 * @tf: ATA taskfile of interest
678 * @dev: ATA device @tf belongs to
683 * Read block address from @tf. This function can handle all
684 * three address formats - LBA, LBA48 and CHS. tf->protocol and
685 * flags select the address format to use.
688 * Block address read from @tf.
690 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
694 if (tf
->flags
& ATA_TFLAG_LBA
) {
695 if (tf
->flags
& ATA_TFLAG_LBA48
) {
696 block
|= (u64
)tf
->hob_lbah
<< 40;
697 block
|= (u64
)tf
->hob_lbam
<< 32;
698 block
|= (u64
)tf
->hob_lbal
<< 24;
700 block
|= (tf
->device
& 0xf) << 24;
702 block
|= tf
->lbah
<< 16;
703 block
|= tf
->lbam
<< 8;
708 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
709 head
= tf
->device
& 0xf;
712 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
;
719 * ata_build_rw_tf - Build ATA taskfile for given read/write request
720 * @tf: Target ATA taskfile
721 * @dev: ATA device @tf belongs to
722 * @block: Block address
723 * @n_block: Number of blocks
724 * @tf_flags: RW/FUA etc...
730 * Build ATA taskfile @tf for read/write request described by
731 * @block, @n_block, @tf_flags and @tag on @dev.
735 * 0 on success, -ERANGE if the request is too large for @dev,
736 * -EINVAL if the request is invalid.
738 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
739 u64 block
, u32 n_block
, unsigned int tf_flags
,
742 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
743 tf
->flags
|= tf_flags
;
745 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
747 if (!lba_48_ok(block
, n_block
))
750 tf
->protocol
= ATA_PROT_NCQ
;
751 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
753 if (tf
->flags
& ATA_TFLAG_WRITE
)
754 tf
->command
= ATA_CMD_FPDMA_WRITE
;
756 tf
->command
= ATA_CMD_FPDMA_READ
;
758 tf
->nsect
= tag
<< 3;
759 tf
->hob_feature
= (n_block
>> 8) & 0xff;
760 tf
->feature
= n_block
& 0xff;
762 tf
->hob_lbah
= (block
>> 40) & 0xff;
763 tf
->hob_lbam
= (block
>> 32) & 0xff;
764 tf
->hob_lbal
= (block
>> 24) & 0xff;
765 tf
->lbah
= (block
>> 16) & 0xff;
766 tf
->lbam
= (block
>> 8) & 0xff;
767 tf
->lbal
= block
& 0xff;
770 if (tf
->flags
& ATA_TFLAG_FUA
)
771 tf
->device
|= 1 << 7;
772 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
773 tf
->flags
|= ATA_TFLAG_LBA
;
775 if (lba_28_ok(block
, n_block
)) {
777 tf
->device
|= (block
>> 24) & 0xf;
778 } else if (lba_48_ok(block
, n_block
)) {
779 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
783 tf
->flags
|= ATA_TFLAG_LBA48
;
785 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
787 tf
->hob_lbah
= (block
>> 40) & 0xff;
788 tf
->hob_lbam
= (block
>> 32) & 0xff;
789 tf
->hob_lbal
= (block
>> 24) & 0xff;
791 /* request too large even for LBA48 */
794 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
797 tf
->nsect
= n_block
& 0xff;
799 tf
->lbah
= (block
>> 16) & 0xff;
800 tf
->lbam
= (block
>> 8) & 0xff;
801 tf
->lbal
= block
& 0xff;
803 tf
->device
|= ATA_LBA
;
806 u32 sect
, head
, cyl
, track
;
808 /* The request -may- be too large for CHS addressing. */
809 if (!lba_28_ok(block
, n_block
))
812 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
815 /* Convert LBA to CHS */
816 track
= (u32
)block
/ dev
->sectors
;
817 cyl
= track
/ dev
->heads
;
818 head
= track
% dev
->heads
;
819 sect
= (u32
)block
% dev
->sectors
+ 1;
821 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
822 (u32
)block
, track
, cyl
, head
, sect
);
824 /* Check whether the converted CHS can fit.
828 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
831 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
842 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
843 * @pio_mask: pio_mask
844 * @mwdma_mask: mwdma_mask
845 * @udma_mask: udma_mask
847 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
848 * unsigned int xfer_mask.
856 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
857 unsigned long mwdma_mask
,
858 unsigned long udma_mask
)
860 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
861 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
862 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
866 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
867 * @xfer_mask: xfer_mask to unpack
868 * @pio_mask: resulting pio_mask
869 * @mwdma_mask: resulting mwdma_mask
870 * @udma_mask: resulting udma_mask
872 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
873 * Any NULL distination masks will be ignored.
875 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
876 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
879 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
881 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
883 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
886 static const struct ata_xfer_ent
{
890 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
891 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
892 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
897 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
898 * @xfer_mask: xfer_mask of interest
900 * Return matching XFER_* value for @xfer_mask. Only the highest
901 * bit of @xfer_mask is considered.
907 * Matching XFER_* value, 0xff if no match found.
909 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
911 int highbit
= fls(xfer_mask
) - 1;
912 const struct ata_xfer_ent
*ent
;
914 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
915 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
916 return ent
->base
+ highbit
- ent
->shift
;
921 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
922 * @xfer_mode: XFER_* of interest
924 * Return matching xfer_mask for @xfer_mode.
930 * Matching xfer_mask, 0 if no match found.
932 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
934 const struct ata_xfer_ent
*ent
;
936 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
937 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
938 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
939 & ~((1 << ent
->shift
) - 1);
944 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
945 * @xfer_mode: XFER_* of interest
947 * Return matching xfer_shift for @xfer_mode.
953 * Matching xfer_shift, -1 if no match found.
955 int ata_xfer_mode2shift(unsigned long xfer_mode
)
957 const struct ata_xfer_ent
*ent
;
959 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
960 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
966 * ata_mode_string - convert xfer_mask to string
967 * @xfer_mask: mask of bits supported; only highest bit counts.
969 * Determine string which represents the highest speed
970 * (highest bit in @modemask).
976 * Constant C string representing highest speed listed in
977 * @mode_mask, or the constant C string "<n/a>".
979 const char *ata_mode_string(unsigned long xfer_mask
)
981 static const char * const xfer_mode_str
[] = {
1005 highbit
= fls(xfer_mask
) - 1;
1006 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
1007 return xfer_mode_str
[highbit
];
1011 static const char *sata_spd_string(unsigned int spd
)
1013 static const char * const spd_str
[] = {
1019 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
1021 return spd_str
[spd
- 1];
1024 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
1026 struct ata_link
*link
= dev
->link
;
1027 struct ata_port
*ap
= link
->ap
;
1029 unsigned int err_mask
;
1033 * disallow DIPM for drivers which haven't set
1034 * ATA_FLAG_IPM. This is because when DIPM is enabled,
1035 * phy ready will be set in the interrupt status on
1036 * state changes, which will cause some drivers to
1037 * think there are errors - additionally drivers will
1038 * need to disable hot plug.
1040 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
1041 ap
->pm_policy
= NOT_AVAILABLE
;
1046 * For DIPM, we will only enable it for the
1047 * min_power setting.
1049 * Why? Because Disks are too stupid to know that
1050 * If the host rejects a request to go to SLUMBER
1051 * they should retry at PARTIAL, and instead it
1052 * just would give up. So, for medium_power to
1053 * work at all, we need to only allow HIPM.
1055 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
1061 /* no restrictions on IPM transitions */
1062 scontrol
&= ~(0x3 << 8);
1063 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1068 if (dev
->flags
& ATA_DFLAG_DIPM
)
1069 err_mask
= ata_dev_set_feature(dev
,
1070 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
1073 /* allow IPM to PARTIAL */
1074 scontrol
&= ~(0x1 << 8);
1075 scontrol
|= (0x2 << 8);
1076 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1081 * we don't have to disable DIPM since IPM flags
1082 * disallow transitions to SLUMBER, which effectively
1083 * disable DIPM if it does not support PARTIAL
1087 case MAX_PERFORMANCE
:
1088 /* disable all IPM transitions */
1089 scontrol
|= (0x3 << 8);
1090 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1095 * we don't have to disable DIPM since IPM flags
1096 * disallow all transitions which effectively
1097 * disable DIPM anyway.
1102 /* FIXME: handle SET FEATURES failure */
1109 * ata_dev_enable_pm - enable SATA interface power management
1110 * @dev: device to enable power management
1111 * @policy: the link power management policy
1113 * Enable SATA Interface power management. This will enable
1114 * Device Interface Power Management (DIPM) for min_power
1115 * policy, and then call driver specific callbacks for
1116 * enabling Host Initiated Power management.
1119 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1121 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
1124 struct ata_port
*ap
= dev
->link
->ap
;
1126 /* set HIPM first, then DIPM */
1127 if (ap
->ops
->enable_pm
)
1128 rc
= ap
->ops
->enable_pm(ap
, policy
);
1131 rc
= ata_dev_set_dipm(dev
, policy
);
1135 ap
->pm_policy
= MAX_PERFORMANCE
;
1137 ap
->pm_policy
= policy
;
1138 return /* rc */; /* hopefully we can use 'rc' eventually */
1143 * ata_dev_disable_pm - disable SATA interface power management
1144 * @dev: device to disable power management
1146 * Disable SATA Interface power management. This will disable
1147 * Device Interface Power Management (DIPM) without changing
1148 * policy, call driver specific callbacks for disabling Host
1149 * Initiated Power management.
1154 static void ata_dev_disable_pm(struct ata_device
*dev
)
1156 struct ata_port
*ap
= dev
->link
->ap
;
1158 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1159 if (ap
->ops
->disable_pm
)
1160 ap
->ops
->disable_pm(ap
);
1162 #endif /* CONFIG_PM */
1164 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1166 ap
->pm_policy
= policy
;
1167 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1168 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1169 ata_port_schedule_eh(ap
);
1173 static void ata_lpm_enable(struct ata_host
*host
)
1175 struct ata_link
*link
;
1176 struct ata_port
*ap
;
1177 struct ata_device
*dev
;
1180 for (i
= 0; i
< host
->n_ports
; i
++) {
1181 ap
= host
->ports
[i
];
1182 ata_for_each_link(link
, ap
, EDGE
) {
1183 ata_for_each_dev(dev
, link
, ALL
)
1184 ata_dev_disable_pm(dev
);
1189 static void ata_lpm_disable(struct ata_host
*host
)
1193 for (i
= 0; i
< host
->n_ports
; i
++) {
1194 struct ata_port
*ap
= host
->ports
[i
];
1195 ata_lpm_schedule(ap
, ap
->pm_policy
);
1198 #endif /* CONFIG_PM */
1201 * ata_dev_classify - determine device type based on ATA-spec signature
1202 * @tf: ATA taskfile register set for device to be identified
1204 * Determine from taskfile register contents whether a device is
1205 * ATA or ATAPI, as per "Signature and persistence" section
1206 * of ATA/PI spec (volume 1, sect 5.14).
1212 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1213 * %ATA_DEV_UNKNOWN the event of failure.
1215 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1217 /* Apple's open source Darwin code hints that some devices only
1218 * put a proper signature into the LBA mid/high registers,
1219 * So, we only check those. It's sufficient for uniqueness.
1221 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1222 * signatures for ATA and ATAPI devices attached on SerialATA,
1223 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1224 * spec has never mentioned about using different signatures
1225 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1226 * Multiplier specification began to use 0x69/0x96 to identify
1227 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1228 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1229 * 0x69/0x96 shortly and described them as reserved for
1232 * We follow the current spec and consider that 0x69/0x96
1233 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1234 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1235 * SEMB signature. This is worked around in
1236 * ata_dev_read_id().
1238 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1239 DPRINTK("found ATA device by sig\n");
1243 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1244 DPRINTK("found ATAPI device by sig\n");
1245 return ATA_DEV_ATAPI
;
1248 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1249 DPRINTK("found PMP device by sig\n");
1253 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1254 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1255 return ATA_DEV_SEMB
;
1258 DPRINTK("unknown device\n");
1259 return ATA_DEV_UNKNOWN
;
1263 * ata_id_string - Convert IDENTIFY DEVICE page into string
1264 * @id: IDENTIFY DEVICE results we will examine
1265 * @s: string into which data is output
1266 * @ofs: offset into identify device page
1267 * @len: length of string to return. must be an even number.
1269 * The strings in the IDENTIFY DEVICE page are broken up into
1270 * 16-bit chunks. Run through the string, and output each
1271 * 8-bit chunk linearly, regardless of platform.
1277 void ata_id_string(const u16
*id
, unsigned char *s
,
1278 unsigned int ofs
, unsigned int len
)
1299 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1300 * @id: IDENTIFY DEVICE results we will examine
1301 * @s: string into which data is output
1302 * @ofs: offset into identify device page
1303 * @len: length of string to return. must be an odd number.
1305 * This function is identical to ata_id_string except that it
1306 * trims trailing spaces and terminates the resulting string with
1307 * null. @len must be actual maximum length (even number) + 1.
1312 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1313 unsigned int ofs
, unsigned int len
)
1317 ata_id_string(id
, s
, ofs
, len
- 1);
1319 p
= s
+ strnlen(s
, len
- 1);
1320 while (p
> s
&& p
[-1] == ' ')
1325 static u64
ata_id_n_sectors(const u16
*id
)
1327 if (ata_id_has_lba(id
)) {
1328 if (ata_id_has_lba48(id
))
1329 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1331 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1333 if (ata_id_current_chs_valid(id
))
1334 return id
[ATA_ID_CUR_CYLS
] * id
[ATA_ID_CUR_HEADS
] *
1335 id
[ATA_ID_CUR_SECTORS
];
1337 return id
[ATA_ID_CYLS
] * id
[ATA_ID_HEADS
] *
1342 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1346 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1347 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1348 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1349 sectors
|= (tf
->lbah
& 0xff) << 16;
1350 sectors
|= (tf
->lbam
& 0xff) << 8;
1351 sectors
|= (tf
->lbal
& 0xff);
1356 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1360 sectors
|= (tf
->device
& 0x0f) << 24;
1361 sectors
|= (tf
->lbah
& 0xff) << 16;
1362 sectors
|= (tf
->lbam
& 0xff) << 8;
1363 sectors
|= (tf
->lbal
& 0xff);
1369 * ata_read_native_max_address - Read native max address
1370 * @dev: target device
1371 * @max_sectors: out parameter for the result native max address
1373 * Perform an LBA48 or LBA28 native size query upon the device in
1377 * 0 on success, -EACCES if command is aborted by the drive.
1378 * -EIO on other errors.
1380 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1382 unsigned int err_mask
;
1383 struct ata_taskfile tf
;
1384 int lba48
= ata_id_has_lba48(dev
->id
);
1386 ata_tf_init(dev
, &tf
);
1388 /* always clear all address registers */
1389 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1392 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1393 tf
.flags
|= ATA_TFLAG_LBA48
;
1395 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1397 tf
.protocol
|= ATA_PROT_NODATA
;
1398 tf
.device
|= ATA_LBA
;
1400 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1402 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1403 "max address (err_mask=0x%x)\n", err_mask
);
1404 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1410 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1412 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1413 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1419 * ata_set_max_sectors - Set max sectors
1420 * @dev: target device
1421 * @new_sectors: new max sectors value to set for the device
1423 * Set max sectors of @dev to @new_sectors.
1426 * 0 on success, -EACCES if command is aborted or denied (due to
1427 * previous non-volatile SET_MAX) by the drive. -EIO on other
1430 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1432 unsigned int err_mask
;
1433 struct ata_taskfile tf
;
1434 int lba48
= ata_id_has_lba48(dev
->id
);
1438 ata_tf_init(dev
, &tf
);
1440 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1443 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1444 tf
.flags
|= ATA_TFLAG_LBA48
;
1446 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1447 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1448 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1450 tf
.command
= ATA_CMD_SET_MAX
;
1452 tf
.device
|= (new_sectors
>> 24) & 0xf;
1455 tf
.protocol
|= ATA_PROT_NODATA
;
1456 tf
.device
|= ATA_LBA
;
1458 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1459 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1460 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1462 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1464 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1465 "max address (err_mask=0x%x)\n", err_mask
);
1466 if (err_mask
== AC_ERR_DEV
&&
1467 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1476 * ata_hpa_resize - Resize a device with an HPA set
1477 * @dev: Device to resize
1479 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1480 * it if required to the full size of the media. The caller must check
1481 * the drive has the HPA feature set enabled.
1484 * 0 on success, -errno on failure.
1486 static int ata_hpa_resize(struct ata_device
*dev
)
1488 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1489 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1490 u64 sectors
= ata_id_n_sectors(dev
->id
);
1494 /* do we need to do it? */
1495 if (dev
->class != ATA_DEV_ATA
||
1496 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1497 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1500 /* read native max address */
1501 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1503 /* If device aborted the command or HPA isn't going to
1504 * be unlocked, skip HPA resizing.
1506 if (rc
== -EACCES
|| !ata_ignore_hpa
) {
1507 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1508 "broken, skipping HPA handling\n");
1509 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1511 /* we can continue if device aborted the command */
1519 /* nothing to do? */
1520 if (native_sectors
<= sectors
|| !ata_ignore_hpa
) {
1521 if (!print_info
|| native_sectors
== sectors
)
1524 if (native_sectors
> sectors
)
1525 ata_dev_printk(dev
, KERN_INFO
,
1526 "HPA detected: current %llu, native %llu\n",
1527 (unsigned long long)sectors
,
1528 (unsigned long long)native_sectors
);
1529 else if (native_sectors
< sectors
)
1530 ata_dev_printk(dev
, KERN_WARNING
,
1531 "native sectors (%llu) is smaller than "
1533 (unsigned long long)native_sectors
,
1534 (unsigned long long)sectors
);
1538 /* let's unlock HPA */
1539 rc
= ata_set_max_sectors(dev
, native_sectors
);
1540 if (rc
== -EACCES
) {
1541 /* if device aborted the command, skip HPA resizing */
1542 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1543 "(%llu -> %llu), skipping HPA handling\n",
1544 (unsigned long long)sectors
,
1545 (unsigned long long)native_sectors
);
1546 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1551 /* re-read IDENTIFY data */
1552 rc
= ata_dev_reread_id(dev
, 0);
1554 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1555 "data after HPA resizing\n");
1560 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1561 ata_dev_printk(dev
, KERN_INFO
,
1562 "HPA unlocked: %llu -> %llu, native %llu\n",
1563 (unsigned long long)sectors
,
1564 (unsigned long long)new_sectors
,
1565 (unsigned long long)native_sectors
);
1572 * ata_dump_id - IDENTIFY DEVICE info debugging output
1573 * @id: IDENTIFY DEVICE page to dump
1575 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1582 static inline void ata_dump_id(const u16
*id
)
1584 DPRINTK("49==0x%04x "
1594 DPRINTK("80==0x%04x "
1604 DPRINTK("88==0x%04x "
1611 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1612 * @id: IDENTIFY data to compute xfer mask from
1614 * Compute the xfermask for this device. This is not as trivial
1615 * as it seems if we must consider early devices correctly.
1617 * FIXME: pre IDE drive timing (do we care ?).
1625 unsigned long ata_id_xfermask(const u16
*id
)
1627 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1629 /* Usual case. Word 53 indicates word 64 is valid */
1630 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1631 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1635 /* If word 64 isn't valid then Word 51 high byte holds
1636 * the PIO timing number for the maximum. Turn it into
1639 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1640 if (mode
< 5) /* Valid PIO range */
1641 pio_mask
= (2 << mode
) - 1;
1645 /* But wait.. there's more. Design your standards by
1646 * committee and you too can get a free iordy field to
1647 * process. However its the speeds not the modes that
1648 * are supported... Note drivers using the timing API
1649 * will get this right anyway
1653 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1655 if (ata_id_is_cfa(id
)) {
1657 * Process compact flash extended modes
1659 int pio
= (id
[ATA_ID_CFA_MODES
] >> 0) & 0x7;
1660 int dma
= (id
[ATA_ID_CFA_MODES
] >> 3) & 0x7;
1663 pio_mask
|= (1 << 5);
1665 pio_mask
|= (1 << 6);
1667 mwdma_mask
|= (1 << 3);
1669 mwdma_mask
|= (1 << 4);
1673 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1674 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1676 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1680 * ata_pio_queue_task - Queue port_task
1681 * @ap: The ata_port to queue port_task for
1682 * @data: data for @fn to use
1683 * @delay: delay time in msecs for workqueue function
1685 * Schedule @fn(@data) for execution after @delay jiffies using
1686 * port_task. There is one port_task per port and it's the
1687 * user(low level driver)'s responsibility to make sure that only
1688 * one task is active at any given time.
1690 * libata core layer takes care of synchronization between
1691 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1695 * Inherited from caller.
1697 void ata_pio_queue_task(struct ata_port
*ap
, void *data
, unsigned long delay
)
1699 ap
->port_task_data
= data
;
1701 /* may fail if ata_port_flush_task() in progress */
1702 queue_delayed_work(ata_wq
, &ap
->port_task
, msecs_to_jiffies(delay
));
1706 * ata_port_flush_task - Flush port_task
1707 * @ap: The ata_port to flush port_task for
1709 * After this function completes, port_task is guranteed not to
1710 * be running or scheduled.
1713 * Kernel thread context (may sleep)
1715 void ata_port_flush_task(struct ata_port
*ap
)
1719 cancel_rearming_delayed_work(&ap
->port_task
);
1721 if (ata_msg_ctl(ap
))
1722 ata_port_printk(ap
, KERN_DEBUG
, "%s: EXIT\n", __func__
);
1725 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1727 struct completion
*waiting
= qc
->private_data
;
1733 * ata_exec_internal_sg - execute libata internal command
1734 * @dev: Device to which the command is sent
1735 * @tf: Taskfile registers for the command and the result
1736 * @cdb: CDB for packet command
1737 * @dma_dir: Data tranfer direction of the command
1738 * @sgl: sg list for the data buffer of the command
1739 * @n_elem: Number of sg entries
1740 * @timeout: Timeout in msecs (0 for default)
1742 * Executes libata internal command with timeout. @tf contains
1743 * command on entry and result on return. Timeout and error
1744 * conditions are reported via return value. No recovery action
1745 * is taken after a command times out. It's caller's duty to
1746 * clean up after timeout.
1749 * None. Should be called with kernel context, might sleep.
1752 * Zero on success, AC_ERR_* mask on failure
1754 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1755 struct ata_taskfile
*tf
, const u8
*cdb
,
1756 int dma_dir
, struct scatterlist
*sgl
,
1757 unsigned int n_elem
, unsigned long timeout
)
1759 struct ata_link
*link
= dev
->link
;
1760 struct ata_port
*ap
= link
->ap
;
1761 u8 command
= tf
->command
;
1762 int auto_timeout
= 0;
1763 struct ata_queued_cmd
*qc
;
1764 unsigned int tag
, preempted_tag
;
1765 u32 preempted_sactive
, preempted_qc_active
;
1766 int preempted_nr_active_links
;
1767 DECLARE_COMPLETION_ONSTACK(wait
);
1768 unsigned long flags
;
1769 unsigned int err_mask
;
1772 spin_lock_irqsave(ap
->lock
, flags
);
1774 /* no internal command while frozen */
1775 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1776 spin_unlock_irqrestore(ap
->lock
, flags
);
1777 return AC_ERR_SYSTEM
;
1780 /* initialize internal qc */
1782 /* XXX: Tag 0 is used for drivers with legacy EH as some
1783 * drivers choke if any other tag is given. This breaks
1784 * ata_tag_internal() test for those drivers. Don't use new
1785 * EH stuff without converting to it.
1787 if (ap
->ops
->error_handler
)
1788 tag
= ATA_TAG_INTERNAL
;
1792 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1794 qc
= __ata_qc_from_tag(ap
, tag
);
1802 preempted_tag
= link
->active_tag
;
1803 preempted_sactive
= link
->sactive
;
1804 preempted_qc_active
= ap
->qc_active
;
1805 preempted_nr_active_links
= ap
->nr_active_links
;
1806 link
->active_tag
= ATA_TAG_POISON
;
1809 ap
->nr_active_links
= 0;
1811 /* prepare & issue qc */
1814 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1815 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1816 qc
->dma_dir
= dma_dir
;
1817 if (dma_dir
!= DMA_NONE
) {
1818 unsigned int i
, buflen
= 0;
1819 struct scatterlist
*sg
;
1821 for_each_sg(sgl
, sg
, n_elem
, i
)
1822 buflen
+= sg
->length
;
1824 ata_sg_init(qc
, sgl
, n_elem
);
1825 qc
->nbytes
= buflen
;
1828 qc
->private_data
= &wait
;
1829 qc
->complete_fn
= ata_qc_complete_internal
;
1833 spin_unlock_irqrestore(ap
->lock
, flags
);
1836 if (ata_probe_timeout
)
1837 timeout
= ata_probe_timeout
* 1000;
1839 timeout
= ata_internal_cmd_timeout(dev
, command
);
1844 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1846 ata_port_flush_task(ap
);
1849 spin_lock_irqsave(ap
->lock
, flags
);
1851 /* We're racing with irq here. If we lose, the
1852 * following test prevents us from completing the qc
1853 * twice. If we win, the port is frozen and will be
1854 * cleaned up by ->post_internal_cmd().
1856 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1857 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1859 if (ap
->ops
->error_handler
)
1860 ata_port_freeze(ap
);
1862 ata_qc_complete(qc
);
1864 if (ata_msg_warn(ap
))
1865 ata_dev_printk(dev
, KERN_WARNING
,
1866 "qc timeout (cmd 0x%x)\n", command
);
1869 spin_unlock_irqrestore(ap
->lock
, flags
);
1872 /* do post_internal_cmd */
1873 if (ap
->ops
->post_internal_cmd
)
1874 ap
->ops
->post_internal_cmd(qc
);
1876 /* perform minimal error analysis */
1877 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1878 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1879 qc
->err_mask
|= AC_ERR_DEV
;
1882 qc
->err_mask
|= AC_ERR_OTHER
;
1884 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1885 qc
->err_mask
&= ~AC_ERR_OTHER
;
1889 spin_lock_irqsave(ap
->lock
, flags
);
1891 *tf
= qc
->result_tf
;
1892 err_mask
= qc
->err_mask
;
1895 link
->active_tag
= preempted_tag
;
1896 link
->sactive
= preempted_sactive
;
1897 ap
->qc_active
= preempted_qc_active
;
1898 ap
->nr_active_links
= preempted_nr_active_links
;
1900 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1901 * Until those drivers are fixed, we detect the condition
1902 * here, fail the command with AC_ERR_SYSTEM and reenable the
1905 * Note that this doesn't change any behavior as internal
1906 * command failure results in disabling the device in the
1907 * higher layer for LLDDs without new reset/EH callbacks.
1909 * Kill the following code as soon as those drivers are fixed.
1911 if (ap
->flags
& ATA_FLAG_DISABLED
) {
1912 err_mask
|= AC_ERR_SYSTEM
;
1916 spin_unlock_irqrestore(ap
->lock
, flags
);
1918 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1919 ata_internal_cmd_timed_out(dev
, command
);
1925 * ata_exec_internal - execute libata internal command
1926 * @dev: Device to which the command is sent
1927 * @tf: Taskfile registers for the command and the result
1928 * @cdb: CDB for packet command
1929 * @dma_dir: Data tranfer direction of the command
1930 * @buf: Data buffer of the command
1931 * @buflen: Length of data buffer
1932 * @timeout: Timeout in msecs (0 for default)
1934 * Wrapper around ata_exec_internal_sg() which takes simple
1935 * buffer instead of sg list.
1938 * None. Should be called with kernel context, might sleep.
1941 * Zero on success, AC_ERR_* mask on failure
1943 unsigned ata_exec_internal(struct ata_device
*dev
,
1944 struct ata_taskfile
*tf
, const u8
*cdb
,
1945 int dma_dir
, void *buf
, unsigned int buflen
,
1946 unsigned long timeout
)
1948 struct scatterlist
*psg
= NULL
, sg
;
1949 unsigned int n_elem
= 0;
1951 if (dma_dir
!= DMA_NONE
) {
1953 sg_init_one(&sg
, buf
, buflen
);
1958 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1963 * ata_do_simple_cmd - execute simple internal command
1964 * @dev: Device to which the command is sent
1965 * @cmd: Opcode to execute
1967 * Execute a 'simple' command, that only consists of the opcode
1968 * 'cmd' itself, without filling any other registers
1971 * Kernel thread context (may sleep).
1974 * Zero on success, AC_ERR_* mask on failure
1976 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1978 struct ata_taskfile tf
;
1980 ata_tf_init(dev
, &tf
);
1983 tf
.flags
|= ATA_TFLAG_DEVICE
;
1984 tf
.protocol
= ATA_PROT_NODATA
;
1986 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1990 * ata_pio_need_iordy - check if iordy needed
1993 * Check if the current speed of the device requires IORDY. Used
1994 * by various controllers for chip configuration.
1997 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1999 /* Controller doesn't support IORDY. Probably a pointless check
2000 as the caller should know this */
2001 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
2003 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
2004 if (ata_id_is_cfa(adev
->id
)
2005 && (adev
->pio_mode
== XFER_PIO_5
|| adev
->pio_mode
== XFER_PIO_6
))
2007 /* PIO3 and higher it is mandatory */
2008 if (adev
->pio_mode
> XFER_PIO_2
)
2010 /* We turn it on when possible */
2011 if (ata_id_has_iordy(adev
->id
))
2017 * ata_pio_mask_no_iordy - Return the non IORDY mask
2020 * Compute the highest mode possible if we are not using iordy. Return
2021 * -1 if no iordy mode is available.
2024 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
2026 /* If we have no drive specific rule, then PIO 2 is non IORDY */
2027 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
2028 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
2029 /* Is the speed faster than the drive allows non IORDY ? */
2031 /* This is cycle times not frequency - watch the logic! */
2032 if (pio
> 240) /* PIO2 is 240nS per cycle */
2033 return 3 << ATA_SHIFT_PIO
;
2034 return 7 << ATA_SHIFT_PIO
;
2037 return 3 << ATA_SHIFT_PIO
;
2041 * ata_do_dev_read_id - default ID read method
2043 * @tf: proposed taskfile
2046 * Issue the identify taskfile and hand back the buffer containing
2047 * identify data. For some RAID controllers and for pre ATA devices
2048 * this function is wrapped or replaced by the driver
2050 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
2051 struct ata_taskfile
*tf
, u16
*id
)
2053 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
2054 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
2058 * ata_dev_read_id - Read ID data from the specified device
2059 * @dev: target device
2060 * @p_class: pointer to class of the target device (may be changed)
2061 * @flags: ATA_READID_* flags
2062 * @id: buffer to read IDENTIFY data into
2064 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2065 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2066 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2067 * for pre-ATA4 drives.
2069 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2070 * now we abort if we hit that case.
2073 * Kernel thread context (may sleep)
2076 * 0 on success, -errno otherwise.
2078 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
2079 unsigned int flags
, u16
*id
)
2081 struct ata_port
*ap
= dev
->link
->ap
;
2082 unsigned int class = *p_class
;
2083 struct ata_taskfile tf
;
2084 unsigned int err_mask
= 0;
2086 bool is_semb
= class == ATA_DEV_SEMB
;
2087 int may_fallback
= 1, tried_spinup
= 0;
2090 if (ata_msg_ctl(ap
))
2091 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2094 ata_tf_init(dev
, &tf
);
2098 class = ATA_DEV_ATA
; /* some hard drives report SEMB sig */
2100 tf
.command
= ATA_CMD_ID_ATA
;
2103 tf
.command
= ATA_CMD_ID_ATAPI
;
2107 reason
= "unsupported class";
2111 tf
.protocol
= ATA_PROT_PIO
;
2113 /* Some devices choke if TF registers contain garbage. Make
2114 * sure those are properly initialized.
2116 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2118 /* Device presence detection is unreliable on some
2119 * controllers. Always poll IDENTIFY if available.
2121 tf
.flags
|= ATA_TFLAG_POLLING
;
2123 if (ap
->ops
->read_id
)
2124 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
2126 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
2129 if (err_mask
& AC_ERR_NODEV_HINT
) {
2130 ata_dev_printk(dev
, KERN_DEBUG
,
2131 "NODEV after polling detection\n");
2136 ata_dev_printk(dev
, KERN_INFO
, "IDENTIFY failed on "
2137 "device w/ SEMB sig, disabled\n");
2138 /* SEMB is not supported yet */
2139 *p_class
= ATA_DEV_SEMB_UNSUP
;
2143 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
2144 /* Device or controller might have reported
2145 * the wrong device class. Give a shot at the
2146 * other IDENTIFY if the current one is
2147 * aborted by the device.
2152 if (class == ATA_DEV_ATA
)
2153 class = ATA_DEV_ATAPI
;
2155 class = ATA_DEV_ATA
;
2159 /* Control reaches here iff the device aborted
2160 * both flavors of IDENTIFYs which happens
2161 * sometimes with phantom devices.
2163 ata_dev_printk(dev
, KERN_DEBUG
,
2164 "both IDENTIFYs aborted, assuming NODEV\n");
2169 reason
= "I/O error";
2173 /* Falling back doesn't make sense if ID data was read
2174 * successfully at least once.
2178 swap_buf_le16(id
, ATA_ID_WORDS
);
2182 reason
= "device reports invalid type";
2184 if (class == ATA_DEV_ATA
) {
2185 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2188 if (ata_id_is_ata(id
))
2192 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2195 * Drive powered-up in standby mode, and requires a specific
2196 * SET_FEATURES spin-up subcommand before it will accept
2197 * anything other than the original IDENTIFY command.
2199 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2200 if (err_mask
&& id
[2] != 0x738c) {
2202 reason
= "SPINUP failed";
2206 * If the drive initially returned incomplete IDENTIFY info,
2207 * we now must reissue the IDENTIFY command.
2209 if (id
[2] == 0x37c8)
2213 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2215 * The exact sequence expected by certain pre-ATA4 drives is:
2217 * IDENTIFY (optional in early ATA)
2218 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2220 * Some drives were very specific about that exact sequence.
2222 * Note that ATA4 says lba is mandatory so the second check
2223 * shoud never trigger.
2225 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2226 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2229 reason
= "INIT_DEV_PARAMS failed";
2233 /* current CHS translation info (id[53-58]) might be
2234 * changed. reread the identify device info.
2236 flags
&= ~ATA_READID_POSTRESET
;
2246 if (ata_msg_warn(ap
))
2247 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2248 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2252 static int ata_do_link_spd_horkage(struct ata_device
*dev
)
2254 struct ata_link
*plink
= ata_dev_phys_link(dev
);
2255 u32 target
, target_limit
;
2257 if (!sata_scr_valid(plink
))
2260 if (dev
->horkage
& ATA_HORKAGE_1_5_GBPS
)
2265 target_limit
= (1 << target
) - 1;
2267 /* if already on stricter limit, no need to push further */
2268 if (plink
->sata_spd_limit
<= target_limit
)
2271 plink
->sata_spd_limit
= target_limit
;
2273 /* Request another EH round by returning -EAGAIN if link is
2274 * going faster than the target speed. Forward progress is
2275 * guaranteed by setting sata_spd_limit to target_limit above.
2277 if (plink
->sata_spd
> target
) {
2278 ata_dev_printk(dev
, KERN_INFO
,
2279 "applying link speed limit horkage to %s\n",
2280 sata_spd_string(target
));
2286 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2288 struct ata_port
*ap
= dev
->link
->ap
;
2290 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_BRIDGE_OK
)
2293 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2296 static void ata_dev_config_ncq(struct ata_device
*dev
,
2297 char *desc
, size_t desc_sz
)
2299 struct ata_port
*ap
= dev
->link
->ap
;
2300 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2302 if (!ata_id_has_ncq(dev
->id
)) {
2306 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2307 snprintf(desc
, desc_sz
, "NCQ (not used)");
2310 if (ap
->flags
& ATA_FLAG_NCQ
) {
2311 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2312 dev
->flags
|= ATA_DFLAG_NCQ
;
2315 if (hdepth
>= ddepth
)
2316 snprintf(desc
, desc_sz
, "NCQ (depth %d)", ddepth
);
2318 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)", hdepth
, ddepth
);
2322 * ata_dev_configure - Configure the specified ATA/ATAPI device
2323 * @dev: Target device to configure
2325 * Configure @dev according to @dev->id. Generic and low-level
2326 * driver specific fixups are also applied.
2329 * Kernel thread context (may sleep)
2332 * 0 on success, -errno otherwise
2334 int ata_dev_configure(struct ata_device
*dev
)
2336 struct ata_port
*ap
= dev
->link
->ap
;
2337 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2338 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2339 const u16
*id
= dev
->id
;
2340 unsigned long xfer_mask
;
2341 char revbuf
[7]; /* XYZ-99\0 */
2342 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2343 char modelbuf
[ATA_ID_PROD_LEN
+1];
2346 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2347 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2352 if (ata_msg_probe(ap
))
2353 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2356 dev
->horkage
|= ata_dev_blacklisted(dev
);
2357 ata_force_horkage(dev
);
2359 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2360 ata_dev_printk(dev
, KERN_INFO
,
2361 "unsupported device, disabling\n");
2362 ata_dev_disable(dev
);
2366 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2367 dev
->class == ATA_DEV_ATAPI
) {
2368 ata_dev_printk(dev
, KERN_WARNING
,
2369 "WARNING: ATAPI is %s, device ignored.\n",
2370 atapi_enabled
? "not supported with this driver"
2372 ata_dev_disable(dev
);
2376 rc
= ata_do_link_spd_horkage(dev
);
2380 /* let ACPI work its magic */
2381 rc
= ata_acpi_on_devcfg(dev
);
2385 /* massage HPA, do it early as it might change IDENTIFY data */
2386 rc
= ata_hpa_resize(dev
);
2390 /* print device capabilities */
2391 if (ata_msg_probe(ap
))
2392 ata_dev_printk(dev
, KERN_DEBUG
,
2393 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2394 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2396 id
[49], id
[82], id
[83], id
[84],
2397 id
[85], id
[86], id
[87], id
[88]);
2399 /* initialize to-be-configured parameters */
2400 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2401 dev
->max_sectors
= 0;
2407 dev
->multi_count
= 0;
2410 * common ATA, ATAPI feature tests
2413 /* find max transfer mode; for printk only */
2414 xfer_mask
= ata_id_xfermask(id
);
2416 if (ata_msg_probe(ap
))
2419 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2420 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2423 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2426 /* ATA-specific feature tests */
2427 if (dev
->class == ATA_DEV_ATA
) {
2428 if (ata_id_is_cfa(id
)) {
2429 /* CPRM may make this media unusable */
2430 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2431 ata_dev_printk(dev
, KERN_WARNING
,
2432 "supports DRM functions and may "
2433 "not be fully accessable.\n");
2434 snprintf(revbuf
, 7, "CFA");
2436 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2437 /* Warn the user if the device has TPM extensions */
2438 if (ata_id_has_tpm(id
))
2439 ata_dev_printk(dev
, KERN_WARNING
,
2440 "supports DRM functions and may "
2441 "not be fully accessable.\n");
2444 dev
->n_sectors
= ata_id_n_sectors(id
);
2446 /* get current R/W Multiple count setting */
2447 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2448 unsigned int max
= dev
->id
[47] & 0xff;
2449 unsigned int cnt
= dev
->id
[59] & 0xff;
2450 /* only recognize/allow powers of two here */
2451 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2453 dev
->multi_count
= cnt
;
2456 if (ata_id_has_lba(id
)) {
2457 const char *lba_desc
;
2461 dev
->flags
|= ATA_DFLAG_LBA
;
2462 if (ata_id_has_lba48(id
)) {
2463 dev
->flags
|= ATA_DFLAG_LBA48
;
2466 if (dev
->n_sectors
>= (1UL << 28) &&
2467 ata_id_has_flush_ext(id
))
2468 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2472 ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2474 /* print device info to dmesg */
2475 if (ata_msg_drv(ap
) && print_info
) {
2476 ata_dev_printk(dev
, KERN_INFO
,
2477 "%s: %s, %s, max %s\n",
2478 revbuf
, modelbuf
, fwrevbuf
,
2479 ata_mode_string(xfer_mask
));
2480 ata_dev_printk(dev
, KERN_INFO
,
2481 "%Lu sectors, multi %u: %s %s\n",
2482 (unsigned long long)dev
->n_sectors
,
2483 dev
->multi_count
, lba_desc
, ncq_desc
);
2488 /* Default translation */
2489 dev
->cylinders
= id
[1];
2491 dev
->sectors
= id
[6];
2493 if (ata_id_current_chs_valid(id
)) {
2494 /* Current CHS translation is valid. */
2495 dev
->cylinders
= id
[54];
2496 dev
->heads
= id
[55];
2497 dev
->sectors
= id
[56];
2500 /* print device info to dmesg */
2501 if (ata_msg_drv(ap
) && print_info
) {
2502 ata_dev_printk(dev
, KERN_INFO
,
2503 "%s: %s, %s, max %s\n",
2504 revbuf
, modelbuf
, fwrevbuf
,
2505 ata_mode_string(xfer_mask
));
2506 ata_dev_printk(dev
, KERN_INFO
,
2507 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2508 (unsigned long long)dev
->n_sectors
,
2509 dev
->multi_count
, dev
->cylinders
,
2510 dev
->heads
, dev
->sectors
);
2517 /* ATAPI-specific feature tests */
2518 else if (dev
->class == ATA_DEV_ATAPI
) {
2519 const char *cdb_intr_string
= "";
2520 const char *atapi_an_string
= "";
2521 const char *dma_dir_string
= "";
2524 rc
= atapi_cdb_len(id
);
2525 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2526 if (ata_msg_warn(ap
))
2527 ata_dev_printk(dev
, KERN_WARNING
,
2528 "unsupported CDB len\n");
2532 dev
->cdb_len
= (unsigned int) rc
;
2534 /* Enable ATAPI AN if both the host and device have
2535 * the support. If PMP is attached, SNTF is required
2536 * to enable ATAPI AN to discern between PHY status
2537 * changed notifications and ATAPI ANs.
2539 if ((ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2540 (!sata_pmp_attached(ap
) ||
2541 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2542 unsigned int err_mask
;
2544 /* issue SET feature command to turn this on */
2545 err_mask
= ata_dev_set_feature(dev
,
2546 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2548 ata_dev_printk(dev
, KERN_ERR
,
2549 "failed to enable ATAPI AN "
2550 "(err_mask=0x%x)\n", err_mask
);
2552 dev
->flags
|= ATA_DFLAG_AN
;
2553 atapi_an_string
= ", ATAPI AN";
2557 if (ata_id_cdb_intr(dev
->id
)) {
2558 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2559 cdb_intr_string
= ", CDB intr";
2562 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2563 dev
->flags
|= ATA_DFLAG_DMADIR
;
2564 dma_dir_string
= ", DMADIR";
2567 /* print device info to dmesg */
2568 if (ata_msg_drv(ap
) && print_info
)
2569 ata_dev_printk(dev
, KERN_INFO
,
2570 "ATAPI: %s, %s, max %s%s%s%s\n",
2572 ata_mode_string(xfer_mask
),
2573 cdb_intr_string
, atapi_an_string
,
2577 /* determine max_sectors */
2578 dev
->max_sectors
= ATA_MAX_SECTORS
;
2579 if (dev
->flags
& ATA_DFLAG_LBA48
)
2580 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2582 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2583 if (ata_id_has_hipm(dev
->id
))
2584 dev
->flags
|= ATA_DFLAG_HIPM
;
2585 if (ata_id_has_dipm(dev
->id
))
2586 dev
->flags
|= ATA_DFLAG_DIPM
;
2589 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2591 if (ata_dev_knobble(dev
)) {
2592 if (ata_msg_drv(ap
) && print_info
)
2593 ata_dev_printk(dev
, KERN_INFO
,
2594 "applying bridge limits\n");
2595 dev
->udma_mask
&= ATA_UDMA5
;
2596 dev
->max_sectors
= ATA_MAX_SECTORS
;
2599 if ((dev
->class == ATA_DEV_ATAPI
) &&
2600 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2601 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2602 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2605 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2606 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2609 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2610 dev
->horkage
|= ATA_HORKAGE_IPM
;
2612 /* reset link pm_policy for this port to no pm */
2613 ap
->pm_policy
= MAX_PERFORMANCE
;
2616 if (ap
->ops
->dev_config
)
2617 ap
->ops
->dev_config(dev
);
2619 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2620 /* Let the user know. We don't want to disallow opens for
2621 rescue purposes, or in case the vendor is just a blithering
2622 idiot. Do this after the dev_config call as some controllers
2623 with buggy firmware may want to avoid reporting false device
2627 ata_dev_printk(dev
, KERN_WARNING
,
2628 "Drive reports diagnostics failure. This may indicate a drive\n");
2629 ata_dev_printk(dev
, KERN_WARNING
,
2630 "fault or invalid emulation. Contact drive vendor for information.\n");
2634 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2635 ata_dev_printk(dev
, KERN_WARNING
, "WARNING: device requires "
2636 "firmware update to be fully functional.\n");
2637 ata_dev_printk(dev
, KERN_WARNING
, " contact the vendor "
2638 "or visit http://ata.wiki.kernel.org.\n");
2644 if (ata_msg_probe(ap
))
2645 ata_dev_printk(dev
, KERN_DEBUG
,
2646 "%s: EXIT, err\n", __func__
);
2651 * ata_cable_40wire - return 40 wire cable type
2654 * Helper method for drivers which want to hardwire 40 wire cable
2658 int ata_cable_40wire(struct ata_port
*ap
)
2660 return ATA_CBL_PATA40
;
2664 * ata_cable_80wire - return 80 wire cable type
2667 * Helper method for drivers which want to hardwire 80 wire cable
2671 int ata_cable_80wire(struct ata_port
*ap
)
2673 return ATA_CBL_PATA80
;
2677 * ata_cable_unknown - return unknown PATA cable.
2680 * Helper method for drivers which have no PATA cable detection.
2683 int ata_cable_unknown(struct ata_port
*ap
)
2685 return ATA_CBL_PATA_UNK
;
2689 * ata_cable_ignore - return ignored PATA cable.
2692 * Helper method for drivers which don't use cable type to limit
2695 int ata_cable_ignore(struct ata_port
*ap
)
2697 return ATA_CBL_PATA_IGN
;
2701 * ata_cable_sata - return SATA cable type
2704 * Helper method for drivers which have SATA cables
2707 int ata_cable_sata(struct ata_port
*ap
)
2709 return ATA_CBL_SATA
;
2713 * ata_bus_probe - Reset and probe ATA bus
2716 * Master ATA bus probing function. Initiates a hardware-dependent
2717 * bus reset, then attempts to identify any devices found on
2721 * PCI/etc. bus probe sem.
2724 * Zero on success, negative errno otherwise.
2727 int ata_bus_probe(struct ata_port
*ap
)
2729 unsigned int classes
[ATA_MAX_DEVICES
];
2730 int tries
[ATA_MAX_DEVICES
];
2732 struct ata_device
*dev
;
2736 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2737 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2740 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2741 /* If we issue an SRST then an ATA drive (not ATAPI)
2742 * may change configuration and be in PIO0 timing. If
2743 * we do a hard reset (or are coming from power on)
2744 * this is true for ATA or ATAPI. Until we've set a
2745 * suitable controller mode we should not touch the
2746 * bus as we may be talking too fast.
2748 dev
->pio_mode
= XFER_PIO_0
;
2750 /* If the controller has a pio mode setup function
2751 * then use it to set the chipset to rights. Don't
2752 * touch the DMA setup as that will be dealt with when
2753 * configuring devices.
2755 if (ap
->ops
->set_piomode
)
2756 ap
->ops
->set_piomode(ap
, dev
);
2759 /* reset and determine device classes */
2760 ap
->ops
->phy_reset(ap
);
2762 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2763 if (!(ap
->flags
& ATA_FLAG_DISABLED
) &&
2764 dev
->class != ATA_DEV_UNKNOWN
)
2765 classes
[dev
->devno
] = dev
->class;
2767 classes
[dev
->devno
] = ATA_DEV_NONE
;
2769 dev
->class = ATA_DEV_UNKNOWN
;
2774 /* read IDENTIFY page and configure devices. We have to do the identify
2775 specific sequence bass-ackwards so that PDIAG- is released by
2778 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2779 if (tries
[dev
->devno
])
2780 dev
->class = classes
[dev
->devno
];
2782 if (!ata_dev_enabled(dev
))
2785 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2791 /* Now ask for the cable type as PDIAG- should have been released */
2792 if (ap
->ops
->cable_detect
)
2793 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2795 /* We may have SATA bridge glue hiding here irrespective of
2796 * the reported cable types and sensed types. When SATA
2797 * drives indicate we have a bridge, we don't know which end
2798 * of the link the bridge is which is a problem.
2800 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2801 if (ata_id_is_sata(dev
->id
))
2802 ap
->cbl
= ATA_CBL_SATA
;
2804 /* After the identify sequence we can now set up the devices. We do
2805 this in the normal order so that the user doesn't get confused */
2807 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2808 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2809 rc
= ata_dev_configure(dev
);
2810 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2815 /* configure transfer mode */
2816 rc
= ata_set_mode(&ap
->link
, &dev
);
2820 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2823 /* no device present, disable port */
2824 ata_port_disable(ap
);
2828 tries
[dev
->devno
]--;
2832 /* eeek, something went very wrong, give up */
2833 tries
[dev
->devno
] = 0;
2837 /* give it just one more chance */
2838 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2840 if (tries
[dev
->devno
] == 1) {
2841 /* This is the last chance, better to slow
2842 * down than lose it.
2844 sata_down_spd_limit(&ap
->link
, 0);
2845 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2849 if (!tries
[dev
->devno
])
2850 ata_dev_disable(dev
);
2856 * ata_port_probe - Mark port as enabled
2857 * @ap: Port for which we indicate enablement
2859 * Modify @ap data structure such that the system
2860 * thinks that the entire port is enabled.
2862 * LOCKING: host lock, or some other form of
2866 void ata_port_probe(struct ata_port
*ap
)
2868 ap
->flags
&= ~ATA_FLAG_DISABLED
;
2872 * sata_print_link_status - Print SATA link status
2873 * @link: SATA link to printk link status about
2875 * This function prints link speed and status of a SATA link.
2880 static void sata_print_link_status(struct ata_link
*link
)
2882 u32 sstatus
, scontrol
, tmp
;
2884 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2886 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2888 if (ata_phys_link_online(link
)) {
2889 tmp
= (sstatus
>> 4) & 0xf;
2890 ata_link_printk(link
, KERN_INFO
,
2891 "SATA link up %s (SStatus %X SControl %X)\n",
2892 sata_spd_string(tmp
), sstatus
, scontrol
);
2894 ata_link_printk(link
, KERN_INFO
,
2895 "SATA link down (SStatus %X SControl %X)\n",
2901 * ata_dev_pair - return other device on cable
2904 * Obtain the other device on the same cable, or if none is
2905 * present NULL is returned
2908 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2910 struct ata_link
*link
= adev
->link
;
2911 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2912 if (!ata_dev_enabled(pair
))
2918 * ata_port_disable - Disable port.
2919 * @ap: Port to be disabled.
2921 * Modify @ap data structure such that the system
2922 * thinks that the entire port is disabled, and should
2923 * never attempt to probe or communicate with devices
2926 * LOCKING: host lock, or some other form of
2930 void ata_port_disable(struct ata_port
*ap
)
2932 ap
->link
.device
[0].class = ATA_DEV_NONE
;
2933 ap
->link
.device
[1].class = ATA_DEV_NONE
;
2934 ap
->flags
|= ATA_FLAG_DISABLED
;
2938 * sata_down_spd_limit - adjust SATA spd limit downward
2939 * @link: Link to adjust SATA spd limit for
2940 * @spd_limit: Additional limit
2942 * Adjust SATA spd limit of @link downward. Note that this
2943 * function only adjusts the limit. The change must be applied
2944 * using sata_set_spd().
2946 * If @spd_limit is non-zero, the speed is limited to equal to or
2947 * lower than @spd_limit if such speed is supported. If
2948 * @spd_limit is slower than any supported speed, only the lowest
2949 * supported speed is allowed.
2952 * Inherited from caller.
2955 * 0 on success, negative errno on failure
2957 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
2959 u32 sstatus
, spd
, mask
;
2962 if (!sata_scr_valid(link
))
2965 /* If SCR can be read, use it to determine the current SPD.
2966 * If not, use cached value in link->sata_spd.
2968 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2969 if (rc
== 0 && ata_sstatus_online(sstatus
))
2970 spd
= (sstatus
>> 4) & 0xf;
2972 spd
= link
->sata_spd
;
2974 mask
= link
->sata_spd_limit
;
2978 /* unconditionally mask off the highest bit */
2979 bit
= fls(mask
) - 1;
2980 mask
&= ~(1 << bit
);
2982 /* Mask off all speeds higher than or equal to the current
2983 * one. Force 1.5Gbps if current SPD is not available.
2986 mask
&= (1 << (spd
- 1)) - 1;
2990 /* were we already at the bottom? */
2995 if (mask
& ((1 << spd_limit
) - 1))
2996 mask
&= (1 << spd_limit
) - 1;
2998 bit
= ffs(mask
) - 1;
3003 link
->sata_spd_limit
= mask
;
3005 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
3006 sata_spd_string(fls(mask
)));
3011 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
3013 struct ata_link
*host_link
= &link
->ap
->link
;
3014 u32 limit
, target
, spd
;
3016 limit
= link
->sata_spd_limit
;
3018 /* Don't configure downstream link faster than upstream link.
3019 * It doesn't speed up anything and some PMPs choke on such
3022 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
3023 limit
&= (1 << host_link
->sata_spd
) - 1;
3025 if (limit
== UINT_MAX
)
3028 target
= fls(limit
);
3030 spd
= (*scontrol
>> 4) & 0xf;
3031 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
3033 return spd
!= target
;
3037 * sata_set_spd_needed - is SATA spd configuration needed
3038 * @link: Link in question
3040 * Test whether the spd limit in SControl matches
3041 * @link->sata_spd_limit. This function is used to determine
3042 * whether hardreset is necessary to apply SATA spd
3046 * Inherited from caller.
3049 * 1 if SATA spd configuration is needed, 0 otherwise.
3051 static int sata_set_spd_needed(struct ata_link
*link
)
3055 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
3058 return __sata_set_spd_needed(link
, &scontrol
);
3062 * sata_set_spd - set SATA spd according to spd limit
3063 * @link: Link to set SATA spd for
3065 * Set SATA spd of @link according to sata_spd_limit.
3068 * Inherited from caller.
3071 * 0 if spd doesn't need to be changed, 1 if spd has been
3072 * changed. Negative errno if SCR registers are inaccessible.
3074 int sata_set_spd(struct ata_link
*link
)
3079 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3082 if (!__sata_set_spd_needed(link
, &scontrol
))
3085 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3092 * This mode timing computation functionality is ported over from
3093 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3096 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3097 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3098 * for UDMA6, which is currently supported only by Maxtor drives.
3100 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3103 static const struct ata_timing ata_timing
[] = {
3104 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3105 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3106 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3107 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3108 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3109 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3110 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3111 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
3113 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3114 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3115 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
3117 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3118 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3119 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3120 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3121 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
3123 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3124 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3125 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3126 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3127 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3128 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3129 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3130 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
3135 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3136 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
3138 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
3140 q
->setup
= EZ(t
->setup
* 1000, T
);
3141 q
->act8b
= EZ(t
->act8b
* 1000, T
);
3142 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
3143 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
3144 q
->active
= EZ(t
->active
* 1000, T
);
3145 q
->recover
= EZ(t
->recover
* 1000, T
);
3146 q
->dmack_hold
= EZ(t
->dmack_hold
* 1000, T
);
3147 q
->cycle
= EZ(t
->cycle
* 1000, T
);
3148 q
->udma
= EZ(t
->udma
* 1000, UT
);
3151 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
3152 struct ata_timing
*m
, unsigned int what
)
3154 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
3155 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
3156 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
3157 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
3158 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
3159 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
3160 if (what
& ATA_TIMING_DMACK_HOLD
) m
->dmack_hold
= max(a
->dmack_hold
, b
->dmack_hold
);
3161 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
3162 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
3165 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
3167 const struct ata_timing
*t
= ata_timing
;
3169 while (xfer_mode
> t
->mode
)
3172 if (xfer_mode
== t
->mode
)
3177 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
3178 struct ata_timing
*t
, int T
, int UT
)
3180 const struct ata_timing
*s
;
3181 struct ata_timing p
;
3187 if (!(s
= ata_timing_find_mode(speed
)))
3190 memcpy(t
, s
, sizeof(*s
));
3193 * If the drive is an EIDE drive, it can tell us it needs extended
3194 * PIO/MW_DMA cycle timing.
3197 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
3198 memset(&p
, 0, sizeof(p
));
3199 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
3200 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
3201 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
3202 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
3203 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
3205 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
3209 * Convert the timing to bus clock counts.
3212 ata_timing_quantize(t
, t
, T
, UT
);
3215 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3216 * S.M.A.R.T * and some other commands. We have to ensure that the
3217 * DMA cycle timing is slower/equal than the fastest PIO timing.
3220 if (speed
> XFER_PIO_6
) {
3221 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3222 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3226 * Lengthen active & recovery time so that cycle time is correct.
3229 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3230 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3231 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3234 if (t
->active
+ t
->recover
< t
->cycle
) {
3235 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3236 t
->recover
= t
->cycle
- t
->active
;
3239 /* In a few cases quantisation may produce enough errors to
3240 leave t->cycle too low for the sum of active and recovery
3241 if so we must correct this */
3242 if (t
->active
+ t
->recover
> t
->cycle
)
3243 t
->cycle
= t
->active
+ t
->recover
;
3249 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3250 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3251 * @cycle: cycle duration in ns
3253 * Return matching xfer mode for @cycle. The returned mode is of
3254 * the transfer type specified by @xfer_shift. If @cycle is too
3255 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3256 * than the fastest known mode, the fasted mode is returned.
3262 * Matching xfer_mode, 0xff if no match found.
3264 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3266 u8 base_mode
= 0xff, last_mode
= 0xff;
3267 const struct ata_xfer_ent
*ent
;
3268 const struct ata_timing
*t
;
3270 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3271 if (ent
->shift
== xfer_shift
)
3272 base_mode
= ent
->base
;
3274 for (t
= ata_timing_find_mode(base_mode
);
3275 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3276 unsigned short this_cycle
;
3278 switch (xfer_shift
) {
3280 case ATA_SHIFT_MWDMA
:
3281 this_cycle
= t
->cycle
;
3283 case ATA_SHIFT_UDMA
:
3284 this_cycle
= t
->udma
;
3290 if (cycle
> this_cycle
)
3293 last_mode
= t
->mode
;
3300 * ata_down_xfermask_limit - adjust dev xfer masks downward
3301 * @dev: Device to adjust xfer masks
3302 * @sel: ATA_DNXFER_* selector
3304 * Adjust xfer masks of @dev downward. Note that this function
3305 * does not apply the change. Invoking ata_set_mode() afterwards
3306 * will apply the limit.
3309 * Inherited from caller.
3312 * 0 on success, negative errno on failure
3314 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3317 unsigned long orig_mask
, xfer_mask
;
3318 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3321 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3322 sel
&= ~ATA_DNXFER_QUIET
;
3324 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3327 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3330 case ATA_DNXFER_PIO
:
3331 highbit
= fls(pio_mask
) - 1;
3332 pio_mask
&= ~(1 << highbit
);
3335 case ATA_DNXFER_DMA
:
3337 highbit
= fls(udma_mask
) - 1;
3338 udma_mask
&= ~(1 << highbit
);
3341 } else if (mwdma_mask
) {
3342 highbit
= fls(mwdma_mask
) - 1;
3343 mwdma_mask
&= ~(1 << highbit
);
3349 case ATA_DNXFER_40C
:
3350 udma_mask
&= ATA_UDMA_MASK_40C
;
3353 case ATA_DNXFER_FORCE_PIO0
:
3355 case ATA_DNXFER_FORCE_PIO
:
3364 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3366 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3370 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3371 snprintf(buf
, sizeof(buf
), "%s:%s",
3372 ata_mode_string(xfer_mask
),
3373 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3375 snprintf(buf
, sizeof(buf
), "%s",
3376 ata_mode_string(xfer_mask
));
3378 ata_dev_printk(dev
, KERN_WARNING
,
3379 "limiting speed to %s\n", buf
);
3382 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3388 static int ata_dev_set_mode(struct ata_device
*dev
)
3390 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3391 const char *dev_err_whine
= "";
3392 int ign_dev_err
= 0;
3393 unsigned int err_mask
;
3396 dev
->flags
&= ~ATA_DFLAG_PIO
;
3397 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3398 dev
->flags
|= ATA_DFLAG_PIO
;
3400 err_mask
= ata_dev_set_xfermode(dev
);
3402 if (err_mask
& ~AC_ERR_DEV
)
3406 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3407 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3408 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3412 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3413 /* Old CFA may refuse this command, which is just fine */
3414 if (ata_id_is_cfa(dev
->id
))
3416 /* Catch several broken garbage emulations plus some pre
3418 if (ata_id_major_version(dev
->id
) == 0 &&
3419 dev
->pio_mode
<= XFER_PIO_2
)
3421 /* Some very old devices and some bad newer ones fail
3422 any kind of SET_XFERMODE request but support PIO0-2
3423 timings and no IORDY */
3424 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3427 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3428 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3429 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3430 dev
->dma_mode
== XFER_MW_DMA_0
&&
3431 (dev
->id
[63] >> 8) & 1)
3434 /* if the device is actually configured correctly, ignore dev err */
3435 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3438 if (err_mask
& AC_ERR_DEV
) {
3442 dev_err_whine
= " (device error ignored)";
3445 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3446 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3448 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3449 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3455 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3456 "(err_mask=0x%x)\n", err_mask
);
3461 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3462 * @link: link on which timings will be programmed
3463 * @r_failed_dev: out parameter for failed device
3465 * Standard implementation of the function used to tune and set
3466 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3467 * ata_dev_set_mode() fails, pointer to the failing device is
3468 * returned in @r_failed_dev.
3471 * PCI/etc. bus probe sem.
3474 * 0 on success, negative errno otherwise
3477 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3479 struct ata_port
*ap
= link
->ap
;
3480 struct ata_device
*dev
;
3481 int rc
= 0, used_dma
= 0, found
= 0;
3483 /* step 1: calculate xfer_mask */
3484 ata_for_each_dev(dev
, link
, ENABLED
) {
3485 unsigned long pio_mask
, dma_mask
;
3486 unsigned int mode_mask
;
3488 mode_mask
= ATA_DMA_MASK_ATA
;
3489 if (dev
->class == ATA_DEV_ATAPI
)
3490 mode_mask
= ATA_DMA_MASK_ATAPI
;
3491 else if (ata_id_is_cfa(dev
->id
))
3492 mode_mask
= ATA_DMA_MASK_CFA
;
3494 ata_dev_xfermask(dev
);
3495 ata_force_xfermask(dev
);
3497 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3498 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3500 if (libata_dma_mask
& mode_mask
)
3501 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3505 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3506 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3509 if (ata_dma_enabled(dev
))
3515 /* step 2: always set host PIO timings */
3516 ata_for_each_dev(dev
, link
, ENABLED
) {
3517 if (dev
->pio_mode
== 0xff) {
3518 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3523 dev
->xfer_mode
= dev
->pio_mode
;
3524 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3525 if (ap
->ops
->set_piomode
)
3526 ap
->ops
->set_piomode(ap
, dev
);
3529 /* step 3: set host DMA timings */
3530 ata_for_each_dev(dev
, link
, ENABLED
) {
3531 if (!ata_dma_enabled(dev
))
3534 dev
->xfer_mode
= dev
->dma_mode
;
3535 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3536 if (ap
->ops
->set_dmamode
)
3537 ap
->ops
->set_dmamode(ap
, dev
);
3540 /* step 4: update devices' xfer mode */
3541 ata_for_each_dev(dev
, link
, ENABLED
) {
3542 rc
= ata_dev_set_mode(dev
);
3547 /* Record simplex status. If we selected DMA then the other
3548 * host channels are not permitted to do so.
3550 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3551 ap
->host
->simplex_claimed
= ap
;
3555 *r_failed_dev
= dev
;
3560 * ata_wait_ready - wait for link to become ready
3561 * @link: link to be waited on
3562 * @deadline: deadline jiffies for the operation
3563 * @check_ready: callback to check link readiness
3565 * Wait for @link to become ready. @check_ready should return
3566 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3567 * link doesn't seem to be occupied, other errno for other error
3570 * Transient -ENODEV conditions are allowed for
3571 * ATA_TMOUT_FF_WAIT.
3577 * 0 if @linke is ready before @deadline; otherwise, -errno.
3579 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3580 int (*check_ready
)(struct ata_link
*link
))
3582 unsigned long start
= jiffies
;
3583 unsigned long nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3586 /* Slave readiness can't be tested separately from master. On
3587 * M/S emulation configuration, this function should be called
3588 * only on the master and it will handle both master and slave.
3590 WARN_ON(link
== link
->ap
->slave_link
);
3592 if (time_after(nodev_deadline
, deadline
))
3593 nodev_deadline
= deadline
;
3596 unsigned long now
= jiffies
;
3599 ready
= tmp
= check_ready(link
);
3603 /* -ENODEV could be transient. Ignore -ENODEV if link
3604 * is online. Also, some SATA devices take a long
3605 * time to clear 0xff after reset. For example,
3606 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3607 * GoVault needs even more than that. Wait for
3608 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3610 * Note that some PATA controllers (pata_ali) explode
3611 * if status register is read more than once when
3612 * there's no device attached.
3614 if (ready
== -ENODEV
) {
3615 if (ata_link_online(link
))
3617 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3618 !ata_link_offline(link
) &&
3619 time_before(now
, nodev_deadline
))
3625 if (time_after(now
, deadline
))
3628 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3629 (deadline
- now
> 3 * HZ
)) {
3630 ata_link_printk(link
, KERN_WARNING
,
3631 "link is slow to respond, please be patient "
3632 "(ready=%d)\n", tmp
);
3641 * ata_wait_after_reset - wait for link to become ready after reset
3642 * @link: link to be waited on
3643 * @deadline: deadline jiffies for the operation
3644 * @check_ready: callback to check link readiness
3646 * Wait for @link to become ready after reset.
3652 * 0 if @linke is ready before @deadline; otherwise, -errno.
3654 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3655 int (*check_ready
)(struct ata_link
*link
))
3657 msleep(ATA_WAIT_AFTER_RESET
);
3659 return ata_wait_ready(link
, deadline
, check_ready
);
3663 * sata_link_debounce - debounce SATA phy status
3664 * @link: ATA link to debounce SATA phy status for
3665 * @params: timing parameters { interval, duratinon, timeout } in msec
3666 * @deadline: deadline jiffies for the operation
3668 * Make sure SStatus of @link reaches stable state, determined by
3669 * holding the same value where DET is not 1 for @duration polled
3670 * every @interval, before @timeout. Timeout constraints the
3671 * beginning of the stable state. Because DET gets stuck at 1 on
3672 * some controllers after hot unplugging, this functions waits
3673 * until timeout then returns 0 if DET is stable at 1.
3675 * @timeout is further limited by @deadline. The sooner of the
3679 * Kernel thread context (may sleep)
3682 * 0 on success, -errno on failure.
3684 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3685 unsigned long deadline
)
3687 unsigned long interval
= params
[0];
3688 unsigned long duration
= params
[1];
3689 unsigned long last_jiffies
, t
;
3693 t
= ata_deadline(jiffies
, params
[2]);
3694 if (time_before(t
, deadline
))
3697 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3702 last_jiffies
= jiffies
;
3706 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3712 if (cur
== 1 && time_before(jiffies
, deadline
))
3714 if (time_after(jiffies
,
3715 ata_deadline(last_jiffies
, duration
)))
3720 /* unstable, start over */
3722 last_jiffies
= jiffies
;
3724 /* Check deadline. If debouncing failed, return
3725 * -EPIPE to tell upper layer to lower link speed.
3727 if (time_after(jiffies
, deadline
))
3733 * sata_link_resume - resume SATA link
3734 * @link: ATA link to resume SATA
3735 * @params: timing parameters { interval, duratinon, timeout } in msec
3736 * @deadline: deadline jiffies for the operation
3738 * Resume SATA phy @link and debounce it.
3741 * Kernel thread context (may sleep)
3744 * 0 on success, -errno on failure.
3746 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3747 unsigned long deadline
)
3749 u32 scontrol
, serror
;
3752 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3755 scontrol
= (scontrol
& 0x0f0) | 0x300;
3757 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3760 /* Some PHYs react badly if SStatus is pounded immediately
3761 * after resuming. Delay 200ms before debouncing.
3765 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3768 /* clear SError, some PHYs require this even for SRST to work */
3769 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3770 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3772 return rc
!= -EINVAL
? rc
: 0;
3776 * ata_std_prereset - prepare for reset
3777 * @link: ATA link to be reset
3778 * @deadline: deadline jiffies for the operation
3780 * @link is about to be reset. Initialize it. Failure from
3781 * prereset makes libata abort whole reset sequence and give up
3782 * that port, so prereset should be best-effort. It does its
3783 * best to prepare for reset sequence but if things go wrong, it
3784 * should just whine, not fail.
3787 * Kernel thread context (may sleep)
3790 * 0 on success, -errno otherwise.
3792 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3794 struct ata_port
*ap
= link
->ap
;
3795 struct ata_eh_context
*ehc
= &link
->eh_context
;
3796 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3799 /* if we're about to do hardreset, nothing more to do */
3800 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3803 /* if SATA, resume link */
3804 if (ap
->flags
& ATA_FLAG_SATA
) {
3805 rc
= sata_link_resume(link
, timing
, deadline
);
3806 /* whine about phy resume failure but proceed */
3807 if (rc
&& rc
!= -EOPNOTSUPP
)
3808 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3809 "link for reset (errno=%d)\n", rc
);
3812 /* no point in trying softreset on offline link */
3813 if (ata_phys_link_offline(link
))
3814 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3820 * sata_link_hardreset - reset link via SATA phy reset
3821 * @link: link to reset
3822 * @timing: timing parameters { interval, duratinon, timeout } in msec
3823 * @deadline: deadline jiffies for the operation
3824 * @online: optional out parameter indicating link onlineness
3825 * @check_ready: optional callback to check link readiness
3827 * SATA phy-reset @link using DET bits of SControl register.
3828 * After hardreset, link readiness is waited upon using
3829 * ata_wait_ready() if @check_ready is specified. LLDs are
3830 * allowed to not specify @check_ready and wait itself after this
3831 * function returns. Device classification is LLD's
3834 * *@online is set to one iff reset succeeded and @link is online
3838 * Kernel thread context (may sleep)
3841 * 0 on success, -errno otherwise.
3843 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3844 unsigned long deadline
,
3845 bool *online
, int (*check_ready
)(struct ata_link
*))
3855 if (sata_set_spd_needed(link
)) {
3856 /* SATA spec says nothing about how to reconfigure
3857 * spd. To be on the safe side, turn off phy during
3858 * reconfiguration. This works for at least ICH7 AHCI
3861 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3864 scontrol
= (scontrol
& 0x0f0) | 0x304;
3866 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3872 /* issue phy wake/reset */
3873 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3876 scontrol
= (scontrol
& 0x0f0) | 0x301;
3878 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3881 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3882 * 10.4.2 says at least 1 ms.
3886 /* bring link back */
3887 rc
= sata_link_resume(link
, timing
, deadline
);
3890 /* if link is offline nothing more to do */
3891 if (ata_phys_link_offline(link
))
3894 /* Link is online. From this point, -ENODEV too is an error. */
3898 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3899 /* If PMP is supported, we have to do follow-up SRST.
3900 * Some PMPs don't send D2H Reg FIS after hardreset if
3901 * the first port is empty. Wait only for
3902 * ATA_TMOUT_PMP_SRST_WAIT.
3905 unsigned long pmp_deadline
;
3907 pmp_deadline
= ata_deadline(jiffies
,
3908 ATA_TMOUT_PMP_SRST_WAIT
);
3909 if (time_after(pmp_deadline
, deadline
))
3910 pmp_deadline
= deadline
;
3911 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3919 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3921 if (rc
&& rc
!= -EAGAIN
) {
3922 /* online is set iff link is online && reset succeeded */
3925 ata_link_printk(link
, KERN_ERR
,
3926 "COMRESET failed (errno=%d)\n", rc
);
3928 DPRINTK("EXIT, rc=%d\n", rc
);
3933 * sata_std_hardreset - COMRESET w/o waiting or classification
3934 * @link: link to reset
3935 * @class: resulting class of attached device
3936 * @deadline: deadline jiffies for the operation
3938 * Standard SATA COMRESET w/o waiting or classification.
3941 * Kernel thread context (may sleep)
3944 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3946 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3947 unsigned long deadline
)
3949 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3954 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3955 return online
? -EAGAIN
: rc
;
3959 * ata_std_postreset - standard postreset callback
3960 * @link: the target ata_link
3961 * @classes: classes of attached devices
3963 * This function is invoked after a successful reset. Note that
3964 * the device might have been reset more than once using
3965 * different reset methods before postreset is invoked.
3968 * Kernel thread context (may sleep)
3970 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3976 /* reset complete, clear SError */
3977 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3978 sata_scr_write(link
, SCR_ERROR
, serror
);
3980 /* print link status */
3981 sata_print_link_status(link
);
3987 * ata_dev_same_device - Determine whether new ID matches configured device
3988 * @dev: device to compare against
3989 * @new_class: class of the new device
3990 * @new_id: IDENTIFY page of the new device
3992 * Compare @new_class and @new_id against @dev and determine
3993 * whether @dev is the device indicated by @new_class and
4000 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4002 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
4005 const u16
*old_id
= dev
->id
;
4006 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
4007 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
4009 if (dev
->class != new_class
) {
4010 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
4011 dev
->class, new_class
);
4015 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
4016 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
4017 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
4018 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
4020 if (strcmp(model
[0], model
[1])) {
4021 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
4022 "'%s' != '%s'\n", model
[0], model
[1]);
4026 if (strcmp(serial
[0], serial
[1])) {
4027 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
4028 "'%s' != '%s'\n", serial
[0], serial
[1]);
4036 * ata_dev_reread_id - Re-read IDENTIFY data
4037 * @dev: target ATA device
4038 * @readid_flags: read ID flags
4040 * Re-read IDENTIFY page and make sure @dev is still attached to
4044 * Kernel thread context (may sleep)
4047 * 0 on success, negative errno otherwise
4049 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4051 unsigned int class = dev
->class;
4052 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4056 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4060 /* is the device still there? */
4061 if (!ata_dev_same_device(dev
, class, id
))
4064 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4069 * ata_dev_revalidate - Revalidate ATA device
4070 * @dev: device to revalidate
4071 * @new_class: new class code
4072 * @readid_flags: read ID flags
4074 * Re-read IDENTIFY page, make sure @dev is still attached to the
4075 * port and reconfigure it according to the new IDENTIFY page.
4078 * Kernel thread context (may sleep)
4081 * 0 on success, negative errno otherwise
4083 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4084 unsigned int readid_flags
)
4086 u64 n_sectors
= dev
->n_sectors
;
4089 if (!ata_dev_enabled(dev
))
4092 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4093 if (ata_class_enabled(new_class
) &&
4094 new_class
!= ATA_DEV_ATA
&& new_class
!= ATA_DEV_ATAPI
) {
4095 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4096 dev
->class, new_class
);
4102 rc
= ata_dev_reread_id(dev
, readid_flags
);
4106 /* configure device according to the new ID */
4107 rc
= ata_dev_configure(dev
);
4111 /* verify n_sectors hasn't changed */
4112 if (dev
->class == ATA_DEV_ATA
&& n_sectors
&&
4113 dev
->n_sectors
!= n_sectors
) {
4114 ata_dev_printk(dev
, KERN_INFO
, "n_sectors mismatch "
4116 (unsigned long long)n_sectors
,
4117 (unsigned long long)dev
->n_sectors
);
4119 /* restore original n_sectors */
4120 dev
->n_sectors
= n_sectors
;
4129 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4133 struct ata_blacklist_entry
{
4134 const char *model_num
;
4135 const char *model_rev
;
4136 unsigned long horkage
;
4139 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4140 /* Devices with DMA related problems under Linux */
4141 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4142 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4143 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4144 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4145 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4146 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4147 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4148 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4149 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4150 { "CRD-8480B", NULL
, ATA_HORKAGE_NODMA
},
4151 { "CRD-8482B", NULL
, ATA_HORKAGE_NODMA
},
4152 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4153 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4154 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4155 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4156 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4157 { "HITACHI CDR-8335", NULL
, ATA_HORKAGE_NODMA
},
4158 { "HITACHI CDR-8435", NULL
, ATA_HORKAGE_NODMA
},
4159 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4160 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4161 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4162 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4163 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4164 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4165 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4166 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4167 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4168 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4169 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4170 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4171 /* Odd clown on sil3726/4726 PMPs */
4172 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
4174 /* Weird ATAPI devices */
4175 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4176 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
4178 /* Devices we expect to fail diagnostics */
4180 /* Devices where NCQ should be avoided */
4182 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4183 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4184 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4185 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4187 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4188 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4189 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4190 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4191 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
4193 /* Seagate NCQ + FLUSH CACHE firmware bug */
4194 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ
|
4195 ATA_HORKAGE_FIRMWARE_WARN
},
4196 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ
|
4197 ATA_HORKAGE_FIRMWARE_WARN
},
4198 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ
|
4199 ATA_HORKAGE_FIRMWARE_WARN
},
4200 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ
|
4201 ATA_HORKAGE_FIRMWARE_WARN
},
4202 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ
|
4203 ATA_HORKAGE_FIRMWARE_WARN
},
4205 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ
|
4206 ATA_HORKAGE_FIRMWARE_WARN
},
4207 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ
|
4208 ATA_HORKAGE_FIRMWARE_WARN
},
4209 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ
|
4210 ATA_HORKAGE_FIRMWARE_WARN
},
4211 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ
|
4212 ATA_HORKAGE_FIRMWARE_WARN
},
4213 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ
|
4214 ATA_HORKAGE_FIRMWARE_WARN
},
4216 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ
|
4217 ATA_HORKAGE_FIRMWARE_WARN
},
4218 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ
|
4219 ATA_HORKAGE_FIRMWARE_WARN
},
4220 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ
|
4221 ATA_HORKAGE_FIRMWARE_WARN
},
4222 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ
|
4223 ATA_HORKAGE_FIRMWARE_WARN
},
4224 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ
|
4225 ATA_HORKAGE_FIRMWARE_WARN
},
4227 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ
|
4228 ATA_HORKAGE_FIRMWARE_WARN
},
4229 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ
|
4230 ATA_HORKAGE_FIRMWARE_WARN
},
4231 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ
|
4232 ATA_HORKAGE_FIRMWARE_WARN
},
4233 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ
|
4234 ATA_HORKAGE_FIRMWARE_WARN
},
4235 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ
|
4236 ATA_HORKAGE_FIRMWARE_WARN
},
4238 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ
|
4239 ATA_HORKAGE_FIRMWARE_WARN
},
4240 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ
|
4241 ATA_HORKAGE_FIRMWARE_WARN
},
4242 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ
|
4243 ATA_HORKAGE_FIRMWARE_WARN
},
4244 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ
|
4245 ATA_HORKAGE_FIRMWARE_WARN
},
4246 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ
|
4247 ATA_HORKAGE_FIRMWARE_WARN
},
4249 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ
|
4250 ATA_HORKAGE_FIRMWARE_WARN
},
4251 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ
|
4252 ATA_HORKAGE_FIRMWARE_WARN
},
4253 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ
|
4254 ATA_HORKAGE_FIRMWARE_WARN
},
4255 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ
|
4256 ATA_HORKAGE_FIRMWARE_WARN
},
4257 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ
|
4258 ATA_HORKAGE_FIRMWARE_WARN
},
4260 /* Blacklist entries taken from Silicon Image 3124/3132
4261 Windows driver .inf file - also several Linux problem reports */
4262 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4263 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4264 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4266 /* devices which puke on READ_NATIVE_MAX */
4267 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4268 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4269 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4270 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4272 /* Devices which report 1 sector over size HPA */
4273 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4274 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4275 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4277 /* Devices which get the IVB wrong */
4278 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4279 /* Maybe we should just blacklist TSSTcorp... */
4280 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB
, },
4281 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB
, },
4282 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB
, },
4283 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB
, },
4284 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB
, },
4285 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB
, },
4287 /* Devices that do not need bridging limits applied */
4288 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4290 /* Devices which aren't very happy with higher link speeds */
4291 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4297 static int strn_pattern_cmp(const char *patt
, const char *name
, int wildchar
)
4303 * check for trailing wildcard: *\0
4305 p
= strchr(patt
, wildchar
);
4306 if (p
&& ((*(p
+ 1)) == 0))
4317 return strncmp(patt
, name
, len
);
4320 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4322 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4323 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4324 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4326 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4327 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4329 while (ad
->model_num
) {
4330 if (!strn_pattern_cmp(ad
->model_num
, model_num
, '*')) {
4331 if (ad
->model_rev
== NULL
)
4333 if (!strn_pattern_cmp(ad
->model_rev
, model_rev
, '*'))
4341 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4343 /* We don't support polling DMA.
4344 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4345 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4347 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4348 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4350 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4354 * ata_is_40wire - check drive side detection
4357 * Perform drive side detection decoding, allowing for device vendors
4358 * who can't follow the documentation.
4361 static int ata_is_40wire(struct ata_device
*dev
)
4363 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4364 return ata_drive_40wire_relaxed(dev
->id
);
4365 return ata_drive_40wire(dev
->id
);
4369 * cable_is_40wire - 40/80/SATA decider
4370 * @ap: port to consider
4372 * This function encapsulates the policy for speed management
4373 * in one place. At the moment we don't cache the result but
4374 * there is a good case for setting ap->cbl to the result when
4375 * we are called with unknown cables (and figuring out if it
4376 * impacts hotplug at all).
4378 * Return 1 if the cable appears to be 40 wire.
4381 static int cable_is_40wire(struct ata_port
*ap
)
4383 struct ata_link
*link
;
4384 struct ata_device
*dev
;
4386 /* If the controller thinks we are 40 wire, we are. */
4387 if (ap
->cbl
== ATA_CBL_PATA40
)
4390 /* If the controller thinks we are 80 wire, we are. */
4391 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4394 /* If the system is known to be 40 wire short cable (eg
4395 * laptop), then we allow 80 wire modes even if the drive
4398 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4401 /* If the controller doesn't know, we scan.
4403 * Note: We look for all 40 wire detects at this point. Any
4404 * 80 wire detect is taken to be 80 wire cable because
4405 * - in many setups only the one drive (slave if present) will
4406 * give a valid detect
4407 * - if you have a non detect capable drive you don't want it
4408 * to colour the choice
4410 ata_for_each_link(link
, ap
, EDGE
) {
4411 ata_for_each_dev(dev
, link
, ENABLED
) {
4412 if (!ata_is_40wire(dev
))
4420 * ata_dev_xfermask - Compute supported xfermask of the given device
4421 * @dev: Device to compute xfermask for
4423 * Compute supported xfermask of @dev and store it in
4424 * dev->*_mask. This function is responsible for applying all
4425 * known limits including host controller limits, device
4431 static void ata_dev_xfermask(struct ata_device
*dev
)
4433 struct ata_link
*link
= dev
->link
;
4434 struct ata_port
*ap
= link
->ap
;
4435 struct ata_host
*host
= ap
->host
;
4436 unsigned long xfer_mask
;
4438 /* controller modes available */
4439 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4440 ap
->mwdma_mask
, ap
->udma_mask
);
4442 /* drive modes available */
4443 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4444 dev
->mwdma_mask
, dev
->udma_mask
);
4445 xfer_mask
&= ata_id_xfermask(dev
->id
);
4448 * CFA Advanced TrueIDE timings are not allowed on a shared
4451 if (ata_dev_pair(dev
)) {
4452 /* No PIO5 or PIO6 */
4453 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4454 /* No MWDMA3 or MWDMA 4 */
4455 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4458 if (ata_dma_blacklisted(dev
)) {
4459 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4460 ata_dev_printk(dev
, KERN_WARNING
,
4461 "device is on DMA blacklist, disabling DMA\n");
4464 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4465 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4466 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4467 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4468 "other device, disabling DMA\n");
4471 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4472 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4474 if (ap
->ops
->mode_filter
)
4475 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4477 /* Apply cable rule here. Don't apply it early because when
4478 * we handle hot plug the cable type can itself change.
4479 * Check this last so that we know if the transfer rate was
4480 * solely limited by the cable.
4481 * Unknown or 80 wire cables reported host side are checked
4482 * drive side as well. Cases where we know a 40wire cable
4483 * is used safely for 80 are not checked here.
4485 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4486 /* UDMA/44 or higher would be available */
4487 if (cable_is_40wire(ap
)) {
4488 ata_dev_printk(dev
, KERN_WARNING
,
4489 "limited to UDMA/33 due to 40-wire cable\n");
4490 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4493 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4494 &dev
->mwdma_mask
, &dev
->udma_mask
);
4498 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4499 * @dev: Device to which command will be sent
4501 * Issue SET FEATURES - XFER MODE command to device @dev
4505 * PCI/etc. bus probe sem.
4508 * 0 on success, AC_ERR_* mask otherwise.
4511 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4513 struct ata_taskfile tf
;
4514 unsigned int err_mask
;
4516 /* set up set-features taskfile */
4517 DPRINTK("set features - xfer mode\n");
4519 /* Some controllers and ATAPI devices show flaky interrupt
4520 * behavior after setting xfer mode. Use polling instead.
4522 ata_tf_init(dev
, &tf
);
4523 tf
.command
= ATA_CMD_SET_FEATURES
;
4524 tf
.feature
= SETFEATURES_XFER
;
4525 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4526 tf
.protocol
= ATA_PROT_NODATA
;
4527 /* If we are using IORDY we must send the mode setting command */
4528 if (ata_pio_need_iordy(dev
))
4529 tf
.nsect
= dev
->xfer_mode
;
4530 /* If the device has IORDY and the controller does not - turn it off */
4531 else if (ata_id_has_iordy(dev
->id
))
4533 else /* In the ancient relic department - skip all of this */
4536 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4538 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4542 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4543 * @dev: Device to which command will be sent
4544 * @enable: Whether to enable or disable the feature
4545 * @feature: The sector count represents the feature to set
4547 * Issue SET FEATURES - SATA FEATURES command to device @dev
4548 * on port @ap with sector count
4551 * PCI/etc. bus probe sem.
4554 * 0 on success, AC_ERR_* mask otherwise.
4556 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4559 struct ata_taskfile tf
;
4560 unsigned int err_mask
;
4562 /* set up set-features taskfile */
4563 DPRINTK("set features - SATA features\n");
4565 ata_tf_init(dev
, &tf
);
4566 tf
.command
= ATA_CMD_SET_FEATURES
;
4567 tf
.feature
= enable
;
4568 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4569 tf
.protocol
= ATA_PROT_NODATA
;
4572 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4574 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4579 * ata_dev_init_params - Issue INIT DEV PARAMS command
4580 * @dev: Device to which command will be sent
4581 * @heads: Number of heads (taskfile parameter)
4582 * @sectors: Number of sectors (taskfile parameter)
4585 * Kernel thread context (may sleep)
4588 * 0 on success, AC_ERR_* mask otherwise.
4590 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4591 u16 heads
, u16 sectors
)
4593 struct ata_taskfile tf
;
4594 unsigned int err_mask
;
4596 /* Number of sectors per track 1-255. Number of heads 1-16 */
4597 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4598 return AC_ERR_INVALID
;
4600 /* set up init dev params taskfile */
4601 DPRINTK("init dev params \n");
4603 ata_tf_init(dev
, &tf
);
4604 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4605 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4606 tf
.protocol
= ATA_PROT_NODATA
;
4608 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4610 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4611 /* A clean abort indicates an original or just out of spec drive
4612 and we should continue as we issue the setup based on the
4613 drive reported working geometry */
4614 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4617 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4622 * ata_sg_clean - Unmap DMA memory associated with command
4623 * @qc: Command containing DMA memory to be released
4625 * Unmap all mapped DMA memory associated with this command.
4628 * spin_lock_irqsave(host lock)
4630 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4632 struct ata_port
*ap
= qc
->ap
;
4633 struct scatterlist
*sg
= qc
->sg
;
4634 int dir
= qc
->dma_dir
;
4636 WARN_ON_ONCE(sg
== NULL
);
4638 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4641 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4643 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4648 * atapi_check_dma - Check whether ATAPI DMA can be supported
4649 * @qc: Metadata associated with taskfile to check
4651 * Allow low-level driver to filter ATA PACKET commands, returning
4652 * a status indicating whether or not it is OK to use DMA for the
4653 * supplied PACKET command.
4656 * spin_lock_irqsave(host lock)
4658 * RETURNS: 0 when ATAPI DMA can be used
4661 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4663 struct ata_port
*ap
= qc
->ap
;
4665 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4666 * few ATAPI devices choke on such DMA requests.
4668 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4669 unlikely(qc
->nbytes
& 15))
4672 if (ap
->ops
->check_atapi_dma
)
4673 return ap
->ops
->check_atapi_dma(qc
);
4679 * ata_std_qc_defer - Check whether a qc needs to be deferred
4680 * @qc: ATA command in question
4682 * Non-NCQ commands cannot run with any other command, NCQ or
4683 * not. As upper layer only knows the queue depth, we are
4684 * responsible for maintaining exclusion. This function checks
4685 * whether a new command @qc can be issued.
4688 * spin_lock_irqsave(host lock)
4691 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4693 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4695 struct ata_link
*link
= qc
->dev
->link
;
4697 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4698 if (!ata_tag_valid(link
->active_tag
))
4701 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4705 return ATA_DEFER_LINK
;
4708 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4711 * ata_sg_init - Associate command with scatter-gather table.
4712 * @qc: Command to be associated
4713 * @sg: Scatter-gather table.
4714 * @n_elem: Number of elements in s/g table.
4716 * Initialize the data-related elements of queued_cmd @qc
4717 * to point to a scatter-gather table @sg, containing @n_elem
4721 * spin_lock_irqsave(host lock)
4723 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4724 unsigned int n_elem
)
4727 qc
->n_elem
= n_elem
;
4732 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4733 * @qc: Command with scatter-gather table to be mapped.
4735 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4738 * spin_lock_irqsave(host lock)
4741 * Zero on success, negative on error.
4744 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4746 struct ata_port
*ap
= qc
->ap
;
4747 unsigned int n_elem
;
4749 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4751 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4755 DPRINTK("%d sg elements mapped\n", n_elem
);
4756 qc
->orig_n_elem
= qc
->n_elem
;
4757 qc
->n_elem
= n_elem
;
4758 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4764 * swap_buf_le16 - swap halves of 16-bit words in place
4765 * @buf: Buffer to swap
4766 * @buf_words: Number of 16-bit words in buffer.
4768 * Swap halves of 16-bit words if needed to convert from
4769 * little-endian byte order to native cpu byte order, or
4773 * Inherited from caller.
4775 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4780 for (i
= 0; i
< buf_words
; i
++)
4781 buf
[i
] = le16_to_cpu(buf
[i
]);
4782 #endif /* __BIG_ENDIAN */
4786 * ata_qc_new - Request an available ATA command, for queueing
4793 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4795 struct ata_queued_cmd
*qc
= NULL
;
4798 /* no command while frozen */
4799 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4802 /* the last tag is reserved for internal command. */
4803 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4804 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4805 qc
= __ata_qc_from_tag(ap
, i
);
4816 * ata_qc_new_init - Request an available ATA command, and initialize it
4817 * @dev: Device from whom we request an available command structure
4823 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4825 struct ata_port
*ap
= dev
->link
->ap
;
4826 struct ata_queued_cmd
*qc
;
4828 qc
= ata_qc_new(ap
);
4841 * ata_qc_free - free unused ata_queued_cmd
4842 * @qc: Command to complete
4844 * Designed to free unused ata_queued_cmd object
4845 * in case something prevents using it.
4848 * spin_lock_irqsave(host lock)
4850 void ata_qc_free(struct ata_queued_cmd
*qc
)
4852 struct ata_port
*ap
= qc
->ap
;
4855 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4859 if (likely(ata_tag_valid(tag
))) {
4860 qc
->tag
= ATA_TAG_POISON
;
4861 clear_bit(tag
, &ap
->qc_allocated
);
4865 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4867 struct ata_port
*ap
= qc
->ap
;
4868 struct ata_link
*link
= qc
->dev
->link
;
4870 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4871 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4873 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4876 /* command should be marked inactive atomically with qc completion */
4877 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4878 link
->sactive
&= ~(1 << qc
->tag
);
4880 ap
->nr_active_links
--;
4882 link
->active_tag
= ATA_TAG_POISON
;
4883 ap
->nr_active_links
--;
4886 /* clear exclusive status */
4887 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4888 ap
->excl_link
== link
))
4889 ap
->excl_link
= NULL
;
4891 /* atapi: mark qc as inactive to prevent the interrupt handler
4892 * from completing the command twice later, before the error handler
4893 * is called. (when rc != 0 and atapi request sense is needed)
4895 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4896 ap
->qc_active
&= ~(1 << qc
->tag
);
4898 /* call completion callback */
4899 qc
->complete_fn(qc
);
4902 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4904 struct ata_port
*ap
= qc
->ap
;
4906 qc
->result_tf
.flags
= qc
->tf
.flags
;
4907 ap
->ops
->qc_fill_rtf(qc
);
4910 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4912 struct ata_device
*dev
= qc
->dev
;
4914 if (ata_tag_internal(qc
->tag
))
4917 if (ata_is_nodata(qc
->tf
.protocol
))
4920 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4923 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4927 * ata_qc_complete - Complete an active ATA command
4928 * @qc: Command to complete
4930 * Indicate to the mid and upper layers that an ATA
4931 * command has completed, with either an ok or not-ok status.
4934 * spin_lock_irqsave(host lock)
4936 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4938 struct ata_port
*ap
= qc
->ap
;
4940 /* XXX: New EH and old EH use different mechanisms to
4941 * synchronize EH with regular execution path.
4943 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4944 * Normal execution path is responsible for not accessing a
4945 * failed qc. libata core enforces the rule by returning NULL
4946 * from ata_qc_from_tag() for failed qcs.
4948 * Old EH depends on ata_qc_complete() nullifying completion
4949 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4950 * not synchronize with interrupt handler. Only PIO task is
4953 if (ap
->ops
->error_handler
) {
4954 struct ata_device
*dev
= qc
->dev
;
4955 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4957 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4959 if (unlikely(qc
->err_mask
))
4960 qc
->flags
|= ATA_QCFLAG_FAILED
;
4962 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4963 if (!ata_tag_internal(qc
->tag
)) {
4964 /* always fill result TF for failed qc */
4966 ata_qc_schedule_eh(qc
);
4971 /* read result TF if requested */
4972 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4975 /* Some commands need post-processing after successful
4978 switch (qc
->tf
.command
) {
4979 case ATA_CMD_SET_FEATURES
:
4980 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4981 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4984 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4985 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4986 /* revalidate device */
4987 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4988 ata_port_schedule_eh(ap
);
4992 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4996 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4997 ata_verify_xfer(qc
);
4999 __ata_qc_complete(qc
);
5001 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5004 /* read result TF if failed or requested */
5005 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5008 __ata_qc_complete(qc
);
5013 * ata_qc_complete_multiple - Complete multiple qcs successfully
5014 * @ap: port in question
5015 * @qc_active: new qc_active mask
5017 * Complete in-flight commands. This functions is meant to be
5018 * called from low-level driver's interrupt routine to complete
5019 * requests normally. ap->qc_active and @qc_active is compared
5020 * and commands are completed accordingly.
5023 * spin_lock_irqsave(host lock)
5026 * Number of completed commands on success, -errno otherwise.
5028 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
5034 done_mask
= ap
->qc_active
^ qc_active
;
5036 if (unlikely(done_mask
& qc_active
)) {
5037 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5038 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5042 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
5043 struct ata_queued_cmd
*qc
;
5045 if (!(done_mask
& (1 << i
)))
5048 if ((qc
= ata_qc_from_tag(ap
, i
))) {
5049 ata_qc_complete(qc
);
5058 * ata_qc_issue - issue taskfile to device
5059 * @qc: command to issue to device
5061 * Prepare an ATA command to submission to device.
5062 * This includes mapping the data into a DMA-able
5063 * area, filling in the S/G table, and finally
5064 * writing the taskfile to hardware, starting the command.
5067 * spin_lock_irqsave(host lock)
5069 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5071 struct ata_port
*ap
= qc
->ap
;
5072 struct ata_link
*link
= qc
->dev
->link
;
5073 u8 prot
= qc
->tf
.protocol
;
5075 /* Make sure only one non-NCQ command is outstanding. The
5076 * check is skipped for old EH because it reuses active qc to
5077 * request ATAPI sense.
5079 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5081 if (ata_is_ncq(prot
)) {
5082 WARN_ON_ONCE(link
->sactive
& (1 << qc
->tag
));
5085 ap
->nr_active_links
++;
5086 link
->sactive
|= 1 << qc
->tag
;
5088 WARN_ON_ONCE(link
->sactive
);
5090 ap
->nr_active_links
++;
5091 link
->active_tag
= qc
->tag
;
5094 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5095 ap
->qc_active
|= 1 << qc
->tag
;
5097 /* We guarantee to LLDs that they will have at least one
5098 * non-zero sg if the command is a data command.
5100 BUG_ON(ata_is_data(prot
) && (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
));
5102 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5103 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
5104 if (ata_sg_setup(qc
))
5107 /* if device is sleeping, schedule reset and abort the link */
5108 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5109 link
->eh_info
.action
|= ATA_EH_RESET
;
5110 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5111 ata_link_abort(link
);
5115 ap
->ops
->qc_prep(qc
);
5117 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5118 if (unlikely(qc
->err_mask
))
5123 qc
->err_mask
|= AC_ERR_SYSTEM
;
5125 ata_qc_complete(qc
);
5129 * sata_scr_valid - test whether SCRs are accessible
5130 * @link: ATA link to test SCR accessibility for
5132 * Test whether SCRs are accessible for @link.
5138 * 1 if SCRs are accessible, 0 otherwise.
5140 int sata_scr_valid(struct ata_link
*link
)
5142 struct ata_port
*ap
= link
->ap
;
5144 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5148 * sata_scr_read - read SCR register of the specified port
5149 * @link: ATA link to read SCR for
5151 * @val: Place to store read value
5153 * Read SCR register @reg of @link into *@val. This function is
5154 * guaranteed to succeed if @link is ap->link, the cable type of
5155 * the port is SATA and the port implements ->scr_read.
5158 * None if @link is ap->link. Kernel thread context otherwise.
5161 * 0 on success, negative errno on failure.
5163 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5165 if (ata_is_host_link(link
)) {
5166 if (sata_scr_valid(link
))
5167 return link
->ap
->ops
->scr_read(link
, reg
, val
);
5171 return sata_pmp_scr_read(link
, reg
, val
);
5175 * sata_scr_write - write SCR register of the specified port
5176 * @link: ATA link to write SCR for
5177 * @reg: SCR to write
5178 * @val: value to write
5180 * Write @val to SCR register @reg of @link. This function is
5181 * guaranteed to succeed if @link is ap->link, the cable type of
5182 * the port is SATA and the port implements ->scr_read.
5185 * None if @link is ap->link. Kernel thread context otherwise.
5188 * 0 on success, negative errno on failure.
5190 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5192 if (ata_is_host_link(link
)) {
5193 if (sata_scr_valid(link
))
5194 return link
->ap
->ops
->scr_write(link
, reg
, val
);
5198 return sata_pmp_scr_write(link
, reg
, val
);
5202 * sata_scr_write_flush - write SCR register of the specified port and flush
5203 * @link: ATA link to write SCR for
5204 * @reg: SCR to write
5205 * @val: value to write
5207 * This function is identical to sata_scr_write() except that this
5208 * function performs flush after writing to the register.
5211 * None if @link is ap->link. Kernel thread context otherwise.
5214 * 0 on success, negative errno on failure.
5216 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5218 if (ata_is_host_link(link
)) {
5221 if (sata_scr_valid(link
)) {
5222 rc
= link
->ap
->ops
->scr_write(link
, reg
, val
);
5224 rc
= link
->ap
->ops
->scr_read(link
, reg
, &val
);
5230 return sata_pmp_scr_write(link
, reg
, val
);
5234 * ata_phys_link_online - test whether the given link is online
5235 * @link: ATA link to test
5237 * Test whether @link is online. Note that this function returns
5238 * 0 if online status of @link cannot be obtained, so
5239 * ata_link_online(link) != !ata_link_offline(link).
5245 * True if the port online status is available and online.
5247 bool ata_phys_link_online(struct ata_link
*link
)
5251 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5252 ata_sstatus_online(sstatus
))
5258 * ata_phys_link_offline - test whether the given link is offline
5259 * @link: ATA link to test
5261 * Test whether @link is offline. Note that this function
5262 * returns 0 if offline status of @link cannot be obtained, so
5263 * ata_link_online(link) != !ata_link_offline(link).
5269 * True if the port offline status is available and offline.
5271 bool ata_phys_link_offline(struct ata_link
*link
)
5275 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5276 !ata_sstatus_online(sstatus
))
5282 * ata_link_online - test whether the given link is online
5283 * @link: ATA link to test
5285 * Test whether @link is online. This is identical to
5286 * ata_phys_link_online() when there's no slave link. When
5287 * there's a slave link, this function should only be called on
5288 * the master link and will return true if any of M/S links is
5295 * True if the port online status is available and online.
5297 bool ata_link_online(struct ata_link
*link
)
5299 struct ata_link
*slave
= link
->ap
->slave_link
;
5301 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5303 return ata_phys_link_online(link
) ||
5304 (slave
&& ata_phys_link_online(slave
));
5308 * ata_link_offline - test whether the given link is offline
5309 * @link: ATA link to test
5311 * Test whether @link is offline. This is identical to
5312 * ata_phys_link_offline() when there's no slave link. When
5313 * there's a slave link, this function should only be called on
5314 * the master link and will return true if both M/S links are
5321 * True if the port offline status is available and offline.
5323 bool ata_link_offline(struct ata_link
*link
)
5325 struct ata_link
*slave
= link
->ap
->slave_link
;
5327 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5329 return ata_phys_link_offline(link
) &&
5330 (!slave
|| ata_phys_link_offline(slave
));
5334 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5335 unsigned int action
, unsigned int ehi_flags
,
5338 unsigned long flags
;
5341 for (i
= 0; i
< host
->n_ports
; i
++) {
5342 struct ata_port
*ap
= host
->ports
[i
];
5343 struct ata_link
*link
;
5345 /* Previous resume operation might still be in
5346 * progress. Wait for PM_PENDING to clear.
5348 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5349 ata_port_wait_eh(ap
);
5350 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5353 /* request PM ops to EH */
5354 spin_lock_irqsave(ap
->lock
, flags
);
5359 ap
->pm_result
= &rc
;
5362 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5363 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5364 link
->eh_info
.action
|= action
;
5365 link
->eh_info
.flags
|= ehi_flags
;
5368 ata_port_schedule_eh(ap
);
5370 spin_unlock_irqrestore(ap
->lock
, flags
);
5372 /* wait and check result */
5374 ata_port_wait_eh(ap
);
5375 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5385 * ata_host_suspend - suspend host
5386 * @host: host to suspend
5389 * Suspend @host. Actual operation is performed by EH. This
5390 * function requests EH to perform PM operations and waits for EH
5394 * Kernel thread context (may sleep).
5397 * 0 on success, -errno on failure.
5399 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5404 * disable link pm on all ports before requesting
5407 ata_lpm_enable(host
);
5409 rc
= ata_host_request_pm(host
, mesg
, 0, ATA_EHI_QUIET
, 1);
5411 host
->dev
->power
.power_state
= mesg
;
5416 * ata_host_resume - resume host
5417 * @host: host to resume
5419 * Resume @host. Actual operation is performed by EH. This
5420 * function requests EH to perform PM operations and returns.
5421 * Note that all resume operations are performed parallely.
5424 * Kernel thread context (may sleep).
5426 void ata_host_resume(struct ata_host
*host
)
5428 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
5429 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5430 host
->dev
->power
.power_state
= PMSG_ON
;
5432 /* reenable link pm */
5433 ata_lpm_disable(host
);
5438 * ata_port_start - Set port up for dma.
5439 * @ap: Port to initialize
5441 * Called just after data structures for each port are
5442 * initialized. Allocates space for PRD table.
5444 * May be used as the port_start() entry in ata_port_operations.
5447 * Inherited from caller.
5449 int ata_port_start(struct ata_port
*ap
)
5451 struct device
*dev
= ap
->dev
;
5453 ap
->prd
= dmam_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
,
5462 * ata_dev_init - Initialize an ata_device structure
5463 * @dev: Device structure to initialize
5465 * Initialize @dev in preparation for probing.
5468 * Inherited from caller.
5470 void ata_dev_init(struct ata_device
*dev
)
5472 struct ata_link
*link
= ata_dev_phys_link(dev
);
5473 struct ata_port
*ap
= link
->ap
;
5474 unsigned long flags
;
5476 /* SATA spd limit is bound to the attached device, reset together */
5477 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5480 /* High bits of dev->flags are used to record warm plug
5481 * requests which occur asynchronously. Synchronize using
5484 spin_lock_irqsave(ap
->lock
, flags
);
5485 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5487 spin_unlock_irqrestore(ap
->lock
, flags
);
5489 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5490 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5491 dev
->pio_mask
= UINT_MAX
;
5492 dev
->mwdma_mask
= UINT_MAX
;
5493 dev
->udma_mask
= UINT_MAX
;
5497 * ata_link_init - Initialize an ata_link structure
5498 * @ap: ATA port link is attached to
5499 * @link: Link structure to initialize
5500 * @pmp: Port multiplier port number
5505 * Kernel thread context (may sleep)
5507 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5511 /* clear everything except for devices */
5512 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
5516 link
->active_tag
= ATA_TAG_POISON
;
5517 link
->hw_sata_spd_limit
= UINT_MAX
;
5519 /* can't use iterator, ap isn't initialized yet */
5520 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5521 struct ata_device
*dev
= &link
->device
[i
];
5524 dev
->devno
= dev
- link
->device
;
5530 * sata_link_init_spd - Initialize link->sata_spd_limit
5531 * @link: Link to configure sata_spd_limit for
5533 * Initialize @link->[hw_]sata_spd_limit to the currently
5537 * Kernel thread context (may sleep).
5540 * 0 on success, -errno on failure.
5542 int sata_link_init_spd(struct ata_link
*link
)
5547 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5551 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5553 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5555 ata_force_link_limits(link
);
5557 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5563 * ata_port_alloc - allocate and initialize basic ATA port resources
5564 * @host: ATA host this allocated port belongs to
5566 * Allocate and initialize basic ATA port resources.
5569 * Allocate ATA port on success, NULL on failure.
5572 * Inherited from calling layer (may sleep).
5574 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5576 struct ata_port
*ap
;
5580 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5584 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5585 ap
->lock
= &host
->lock
;
5586 ap
->flags
= ATA_FLAG_DISABLED
;
5588 ap
->ctl
= ATA_DEVCTL_OBS
;
5590 ap
->dev
= host
->dev
;
5591 ap
->last_ctl
= 0xFF;
5593 #if defined(ATA_VERBOSE_DEBUG)
5594 /* turn on all debugging levels */
5595 ap
->msg_enable
= 0x00FF;
5596 #elif defined(ATA_DEBUG)
5597 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5599 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5602 #ifdef CONFIG_ATA_SFF
5603 INIT_DELAYED_WORK(&ap
->port_task
, ata_pio_task
);
5605 INIT_DELAYED_WORK(&ap
->port_task
, NULL
);
5607 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5608 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5609 INIT_LIST_HEAD(&ap
->eh_done_q
);
5610 init_waitqueue_head(&ap
->eh_wait_q
);
5611 init_completion(&ap
->park_req_pending
);
5612 init_timer_deferrable(&ap
->fastdrain_timer
);
5613 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5614 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5616 ap
->cbl
= ATA_CBL_NONE
;
5618 ata_link_init(ap
, &ap
->link
, 0);
5621 ap
->stats
.unhandled_irq
= 1;
5622 ap
->stats
.idle_irq
= 1;
5627 static void ata_host_release(struct device
*gendev
, void *res
)
5629 struct ata_host
*host
= dev_get_drvdata(gendev
);
5632 for (i
= 0; i
< host
->n_ports
; i
++) {
5633 struct ata_port
*ap
= host
->ports
[i
];
5639 scsi_host_put(ap
->scsi_host
);
5641 kfree(ap
->pmp_link
);
5642 kfree(ap
->slave_link
);
5644 host
->ports
[i
] = NULL
;
5647 dev_set_drvdata(gendev
, NULL
);
5651 * ata_host_alloc - allocate and init basic ATA host resources
5652 * @dev: generic device this host is associated with
5653 * @max_ports: maximum number of ATA ports associated with this host
5655 * Allocate and initialize basic ATA host resources. LLD calls
5656 * this function to allocate a host, initializes it fully and
5657 * attaches it using ata_host_register().
5659 * @max_ports ports are allocated and host->n_ports is
5660 * initialized to @max_ports. The caller is allowed to decrease
5661 * host->n_ports before calling ata_host_register(). The unused
5662 * ports will be automatically freed on registration.
5665 * Allocate ATA host on success, NULL on failure.
5668 * Inherited from calling layer (may sleep).
5670 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5672 struct ata_host
*host
;
5678 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5681 /* alloc a container for our list of ATA ports (buses) */
5682 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5683 /* alloc a container for our list of ATA ports (buses) */
5684 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5688 devres_add(dev
, host
);
5689 dev_set_drvdata(dev
, host
);
5691 spin_lock_init(&host
->lock
);
5693 host
->n_ports
= max_ports
;
5695 /* allocate ports bound to this host */
5696 for (i
= 0; i
< max_ports
; i
++) {
5697 struct ata_port
*ap
;
5699 ap
= ata_port_alloc(host
);
5704 host
->ports
[i
] = ap
;
5707 devres_remove_group(dev
, NULL
);
5711 devres_release_group(dev
, NULL
);
5716 * ata_host_alloc_pinfo - alloc host and init with port_info array
5717 * @dev: generic device this host is associated with
5718 * @ppi: array of ATA port_info to initialize host with
5719 * @n_ports: number of ATA ports attached to this host
5721 * Allocate ATA host and initialize with info from @ppi. If NULL
5722 * terminated, @ppi may contain fewer entries than @n_ports. The
5723 * last entry will be used for the remaining ports.
5726 * Allocate ATA host on success, NULL on failure.
5729 * Inherited from calling layer (may sleep).
5731 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5732 const struct ata_port_info
* const * ppi
,
5735 const struct ata_port_info
*pi
;
5736 struct ata_host
*host
;
5739 host
= ata_host_alloc(dev
, n_ports
);
5743 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5744 struct ata_port
*ap
= host
->ports
[i
];
5749 ap
->pio_mask
= pi
->pio_mask
;
5750 ap
->mwdma_mask
= pi
->mwdma_mask
;
5751 ap
->udma_mask
= pi
->udma_mask
;
5752 ap
->flags
|= pi
->flags
;
5753 ap
->link
.flags
|= pi
->link_flags
;
5754 ap
->ops
= pi
->port_ops
;
5756 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5757 host
->ops
= pi
->port_ops
;
5764 * ata_slave_link_init - initialize slave link
5765 * @ap: port to initialize slave link for
5767 * Create and initialize slave link for @ap. This enables slave
5768 * link handling on the port.
5770 * In libata, a port contains links and a link contains devices.
5771 * There is single host link but if a PMP is attached to it,
5772 * there can be multiple fan-out links. On SATA, there's usually
5773 * a single device connected to a link but PATA and SATA
5774 * controllers emulating TF based interface can have two - master
5777 * However, there are a few controllers which don't fit into this
5778 * abstraction too well - SATA controllers which emulate TF
5779 * interface with both master and slave devices but also have
5780 * separate SCR register sets for each device. These controllers
5781 * need separate links for physical link handling
5782 * (e.g. onlineness, link speed) but should be treated like a
5783 * traditional M/S controller for everything else (e.g. command
5784 * issue, softreset).
5786 * slave_link is libata's way of handling this class of
5787 * controllers without impacting core layer too much. For
5788 * anything other than physical link handling, the default host
5789 * link is used for both master and slave. For physical link
5790 * handling, separate @ap->slave_link is used. All dirty details
5791 * are implemented inside libata core layer. From LLD's POV, the
5792 * only difference is that prereset, hardreset and postreset are
5793 * called once more for the slave link, so the reset sequence
5794 * looks like the following.
5796 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5797 * softreset(M) -> postreset(M) -> postreset(S)
5799 * Note that softreset is called only for the master. Softreset
5800 * resets both M/S by definition, so SRST on master should handle
5801 * both (the standard method will work just fine).
5804 * Should be called before host is registered.
5807 * 0 on success, -errno on failure.
5809 int ata_slave_link_init(struct ata_port
*ap
)
5811 struct ata_link
*link
;
5813 WARN_ON(ap
->slave_link
);
5814 WARN_ON(ap
->flags
& ATA_FLAG_PMP
);
5816 link
= kzalloc(sizeof(*link
), GFP_KERNEL
);
5820 ata_link_init(ap
, link
, 1);
5821 ap
->slave_link
= link
;
5825 static void ata_host_stop(struct device
*gendev
, void *res
)
5827 struct ata_host
*host
= dev_get_drvdata(gendev
);
5830 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5832 for (i
= 0; i
< host
->n_ports
; i
++) {
5833 struct ata_port
*ap
= host
->ports
[i
];
5835 if (ap
->ops
->port_stop
)
5836 ap
->ops
->port_stop(ap
);
5839 if (host
->ops
->host_stop
)
5840 host
->ops
->host_stop(host
);
5844 * ata_finalize_port_ops - finalize ata_port_operations
5845 * @ops: ata_port_operations to finalize
5847 * An ata_port_operations can inherit from another ops and that
5848 * ops can again inherit from another. This can go on as many
5849 * times as necessary as long as there is no loop in the
5850 * inheritance chain.
5852 * Ops tables are finalized when the host is started. NULL or
5853 * unspecified entries are inherited from the closet ancestor
5854 * which has the method and the entry is populated with it.
5855 * After finalization, the ops table directly points to all the
5856 * methods and ->inherits is no longer necessary and cleared.
5858 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5863 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5865 static DEFINE_SPINLOCK(lock
);
5866 const struct ata_port_operations
*cur
;
5867 void **begin
= (void **)ops
;
5868 void **end
= (void **)&ops
->inherits
;
5871 if (!ops
|| !ops
->inherits
)
5876 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5877 void **inherit
= (void **)cur
;
5879 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5884 for (pp
= begin
; pp
< end
; pp
++)
5888 ops
->inherits
= NULL
;
5894 * ata_host_start - start and freeze ports of an ATA host
5895 * @host: ATA host to start ports for
5897 * Start and then freeze ports of @host. Started status is
5898 * recorded in host->flags, so this function can be called
5899 * multiple times. Ports are guaranteed to get started only
5900 * once. If host->ops isn't initialized yet, its set to the
5901 * first non-dummy port ops.
5904 * Inherited from calling layer (may sleep).
5907 * 0 if all ports are started successfully, -errno otherwise.
5909 int ata_host_start(struct ata_host
*host
)
5912 void *start_dr
= NULL
;
5915 if (host
->flags
& ATA_HOST_STARTED
)
5918 ata_finalize_port_ops(host
->ops
);
5920 for (i
= 0; i
< host
->n_ports
; i
++) {
5921 struct ata_port
*ap
= host
->ports
[i
];
5923 ata_finalize_port_ops(ap
->ops
);
5925 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5926 host
->ops
= ap
->ops
;
5928 if (ap
->ops
->port_stop
)
5932 if (host
->ops
->host_stop
)
5936 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5941 for (i
= 0; i
< host
->n_ports
; i
++) {
5942 struct ata_port
*ap
= host
->ports
[i
];
5944 if (ap
->ops
->port_start
) {
5945 rc
= ap
->ops
->port_start(ap
);
5948 dev_printk(KERN_ERR
, host
->dev
,
5949 "failed to start port %d "
5950 "(errno=%d)\n", i
, rc
);
5954 ata_eh_freeze_port(ap
);
5958 devres_add(host
->dev
, start_dr
);
5959 host
->flags
|= ATA_HOST_STARTED
;
5964 struct ata_port
*ap
= host
->ports
[i
];
5966 if (ap
->ops
->port_stop
)
5967 ap
->ops
->port_stop(ap
);
5969 devres_free(start_dr
);
5974 * ata_sas_host_init - Initialize a host struct
5975 * @host: host to initialize
5976 * @dev: device host is attached to
5977 * @flags: host flags
5981 * PCI/etc. bus probe sem.
5984 /* KILLME - the only user left is ipr */
5985 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5986 unsigned long flags
, struct ata_port_operations
*ops
)
5988 spin_lock_init(&host
->lock
);
5990 host
->flags
= flags
;
5995 static void async_port_probe(void *data
, async_cookie_t cookie
)
5998 struct ata_port
*ap
= data
;
6001 * If we're not allowed to scan this host in parallel,
6002 * we need to wait until all previous scans have completed
6003 * before going further.
6004 * Jeff Garzik says this is only within a controller, so we
6005 * don't need to wait for port 0, only for later ports.
6007 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
6008 async_synchronize_cookie(cookie
);
6011 if (ap
->ops
->error_handler
) {
6012 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6013 unsigned long flags
;
6017 /* kick EH for boot probing */
6018 spin_lock_irqsave(ap
->lock
, flags
);
6020 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
6021 ehi
->action
|= ATA_EH_RESET
| ATA_EH_LPM
;
6022 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6024 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6025 ap
->pflags
|= ATA_PFLAG_LOADING
;
6026 ata_port_schedule_eh(ap
);
6028 spin_unlock_irqrestore(ap
->lock
, flags
);
6030 /* wait for EH to finish */
6031 ata_port_wait_eh(ap
);
6033 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6034 rc
= ata_bus_probe(ap
);
6035 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6038 /* FIXME: do something useful here?
6039 * Current libata behavior will
6040 * tear down everything when
6041 * the module is removed
6042 * or the h/w is unplugged.
6047 /* in order to keep device order, we need to synchronize at this point */
6048 async_synchronize_cookie(cookie
);
6050 ata_scsi_scan_host(ap
, 1);
6054 * ata_host_register - register initialized ATA host
6055 * @host: ATA host to register
6056 * @sht: template for SCSI host
6058 * Register initialized ATA host. @host is allocated using
6059 * ata_host_alloc() and fully initialized by LLD. This function
6060 * starts ports, registers @host with ATA and SCSI layers and
6061 * probe registered devices.
6064 * Inherited from calling layer (may sleep).
6067 * 0 on success, -errno otherwise.
6069 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6073 /* host must have been started */
6074 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6075 dev_printk(KERN_ERR
, host
->dev
,
6076 "BUG: trying to register unstarted host\n");
6081 /* Blow away unused ports. This happens when LLD can't
6082 * determine the exact number of ports to allocate at
6085 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6086 kfree(host
->ports
[i
]);
6088 /* give ports names and add SCSI hosts */
6089 for (i
= 0; i
< host
->n_ports
; i
++)
6090 host
->ports
[i
]->print_id
= ata_print_id
++;
6092 rc
= ata_scsi_add_hosts(host
, sht
);
6096 /* associate with ACPI nodes */
6097 ata_acpi_associate(host
);
6099 /* set cable, sata_spd_limit and report */
6100 for (i
= 0; i
< host
->n_ports
; i
++) {
6101 struct ata_port
*ap
= host
->ports
[i
];
6102 unsigned long xfer_mask
;
6104 /* set SATA cable type if still unset */
6105 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6106 ap
->cbl
= ATA_CBL_SATA
;
6108 /* init sata_spd_limit to the current value */
6109 sata_link_init_spd(&ap
->link
);
6111 sata_link_init_spd(ap
->slave_link
);
6113 /* print per-port info to dmesg */
6114 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6117 if (!ata_port_is_dummy(ap
)) {
6118 ata_port_printk(ap
, KERN_INFO
,
6119 "%cATA max %s %s\n",
6120 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6121 ata_mode_string(xfer_mask
),
6122 ap
->link
.eh_info
.desc
);
6123 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6125 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6128 /* perform each probe asynchronously */
6129 for (i
= 0; i
< host
->n_ports
; i
++) {
6130 struct ata_port
*ap
= host
->ports
[i
];
6131 async_schedule(async_port_probe
, ap
);
6138 * ata_host_activate - start host, request IRQ and register it
6139 * @host: target ATA host
6140 * @irq: IRQ to request
6141 * @irq_handler: irq_handler used when requesting IRQ
6142 * @irq_flags: irq_flags used when requesting IRQ
6143 * @sht: scsi_host_template to use when registering the host
6145 * After allocating an ATA host and initializing it, most libata
6146 * LLDs perform three steps to activate the host - start host,
6147 * request IRQ and register it. This helper takes necessasry
6148 * arguments and performs the three steps in one go.
6150 * An invalid IRQ skips the IRQ registration and expects the host to
6151 * have set polling mode on the port. In this case, @irq_handler
6155 * Inherited from calling layer (may sleep).
6158 * 0 on success, -errno otherwise.
6160 int ata_host_activate(struct ata_host
*host
, int irq
,
6161 irq_handler_t irq_handler
, unsigned long irq_flags
,
6162 struct scsi_host_template
*sht
)
6166 rc
= ata_host_start(host
);
6170 /* Special case for polling mode */
6172 WARN_ON(irq_handler
);
6173 return ata_host_register(host
, sht
);
6176 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6177 dev_driver_string(host
->dev
), host
);
6181 for (i
= 0; i
< host
->n_ports
; i
++)
6182 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6184 rc
= ata_host_register(host
, sht
);
6185 /* if failed, just free the IRQ and leave ports alone */
6187 devm_free_irq(host
->dev
, irq
, host
);
6193 * ata_port_detach - Detach ATA port in prepration of device removal
6194 * @ap: ATA port to be detached
6196 * Detach all ATA devices and the associated SCSI devices of @ap;
6197 * then, remove the associated SCSI host. @ap is guaranteed to
6198 * be quiescent on return from this function.
6201 * Kernel thread context (may sleep).
6203 static void ata_port_detach(struct ata_port
*ap
)
6205 unsigned long flags
;
6207 if (!ap
->ops
->error_handler
)
6210 /* tell EH we're leaving & flush EH */
6211 spin_lock_irqsave(ap
->lock
, flags
);
6212 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6213 ata_port_schedule_eh(ap
);
6214 spin_unlock_irqrestore(ap
->lock
, flags
);
6216 /* wait till EH commits suicide */
6217 ata_port_wait_eh(ap
);
6219 /* it better be dead now */
6220 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
6222 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6225 /* remove the associated SCSI host */
6226 scsi_remove_host(ap
->scsi_host
);
6230 * ata_host_detach - Detach all ports of an ATA host
6231 * @host: Host to detach
6233 * Detach all ports of @host.
6236 * Kernel thread context (may sleep).
6238 void ata_host_detach(struct ata_host
*host
)
6242 for (i
= 0; i
< host
->n_ports
; i
++)
6243 ata_port_detach(host
->ports
[i
]);
6245 /* the host is dead now, dissociate ACPI */
6246 ata_acpi_dissociate(host
);
6252 * ata_pci_remove_one - PCI layer callback for device removal
6253 * @pdev: PCI device that was removed
6255 * PCI layer indicates to libata via this hook that hot-unplug or
6256 * module unload event has occurred. Detach all ports. Resource
6257 * release is handled via devres.
6260 * Inherited from PCI layer (may sleep).
6262 void ata_pci_remove_one(struct pci_dev
*pdev
)
6264 struct device
*dev
= &pdev
->dev
;
6265 struct ata_host
*host
= dev_get_drvdata(dev
);
6267 ata_host_detach(host
);
6270 /* move to PCI subsystem */
6271 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6273 unsigned long tmp
= 0;
6275 switch (bits
->width
) {
6278 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6284 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6290 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6301 return (tmp
== bits
->val
) ? 1 : 0;
6305 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6307 pci_save_state(pdev
);
6308 pci_disable_device(pdev
);
6310 if (mesg
.event
& PM_EVENT_SLEEP
)
6311 pci_set_power_state(pdev
, PCI_D3hot
);
6314 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6318 pci_set_power_state(pdev
, PCI_D0
);
6319 pci_restore_state(pdev
);
6321 rc
= pcim_enable_device(pdev
);
6323 dev_printk(KERN_ERR
, &pdev
->dev
,
6324 "failed to enable device after resume (%d)\n", rc
);
6328 pci_set_master(pdev
);
6332 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6334 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6337 rc
= ata_host_suspend(host
, mesg
);
6341 ata_pci_device_do_suspend(pdev
, mesg
);
6346 int ata_pci_device_resume(struct pci_dev
*pdev
)
6348 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6351 rc
= ata_pci_device_do_resume(pdev
);
6353 ata_host_resume(host
);
6356 #endif /* CONFIG_PM */
6358 #endif /* CONFIG_PCI */
6360 static int __init
ata_parse_force_one(char **cur
,
6361 struct ata_force_ent
*force_ent
,
6362 const char **reason
)
6364 /* FIXME: Currently, there's no way to tag init const data and
6365 * using __initdata causes build failure on some versions of
6366 * gcc. Once __initdataconst is implemented, add const to the
6367 * following structure.
6369 static struct ata_force_param force_tbl
[] __initdata
= {
6370 { "40c", .cbl
= ATA_CBL_PATA40
},
6371 { "80c", .cbl
= ATA_CBL_PATA80
},
6372 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6373 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6374 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6375 { "sata", .cbl
= ATA_CBL_SATA
},
6376 { "1.5Gbps", .spd_limit
= 1 },
6377 { "3.0Gbps", .spd_limit
= 2 },
6378 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6379 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6380 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6381 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6382 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6383 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6384 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6385 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6386 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6387 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6388 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6389 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6390 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6391 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6392 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6393 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6394 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6395 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6396 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6397 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6398 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6399 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6400 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6401 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6402 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6403 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6404 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6405 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6406 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6407 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6408 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6409 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6410 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6411 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6412 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6413 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6414 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6415 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6416 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6418 char *start
= *cur
, *p
= *cur
;
6419 char *id
, *val
, *endp
;
6420 const struct ata_force_param
*match_fp
= NULL
;
6421 int nr_matches
= 0, i
;
6423 /* find where this param ends and update *cur */
6424 while (*p
!= '\0' && *p
!= ',')
6435 p
= strchr(start
, ':');
6437 val
= strstrip(start
);
6442 id
= strstrip(start
);
6443 val
= strstrip(p
+ 1);
6446 p
= strchr(id
, '.');
6449 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6450 if (p
== endp
|| *endp
!= '\0') {
6451 *reason
= "invalid device";
6456 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6457 if (p
== endp
|| *endp
!= '\0') {
6458 *reason
= "invalid port/link";
6463 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6464 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6465 const struct ata_force_param
*fp
= &force_tbl
[i
];
6467 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6473 if (strcasecmp(val
, fp
->name
) == 0) {
6480 *reason
= "unknown value";
6483 if (nr_matches
> 1) {
6484 *reason
= "ambigious value";
6488 force_ent
->param
= *match_fp
;
6493 static void __init
ata_parse_force_param(void)
6495 int idx
= 0, size
= 1;
6496 int last_port
= -1, last_device
= -1;
6497 char *p
, *cur
, *next
;
6499 /* calculate maximum number of params and allocate force_tbl */
6500 for (p
= ata_force_param_buf
; *p
; p
++)
6504 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6505 if (!ata_force_tbl
) {
6506 printk(KERN_WARNING
"ata: failed to extend force table, "
6507 "libata.force ignored\n");
6511 /* parse and populate the table */
6512 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6513 const char *reason
= "";
6514 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6517 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6518 printk(KERN_WARNING
"ata: failed to parse force "
6519 "parameter \"%s\" (%s)\n",
6524 if (te
.port
== -1) {
6525 te
.port
= last_port
;
6526 te
.device
= last_device
;
6529 ata_force_tbl
[idx
++] = te
;
6531 last_port
= te
.port
;
6532 last_device
= te
.device
;
6535 ata_force_tbl_size
= idx
;
6538 static int __init
ata_init(void)
6540 ata_parse_force_param();
6542 ata_wq
= create_workqueue("ata");
6544 goto free_force_tbl
;
6546 ata_aux_wq
= create_singlethread_workqueue("ata_aux");
6550 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6554 destroy_workqueue(ata_wq
);
6556 kfree(ata_force_tbl
);
6560 static void __exit
ata_exit(void)
6562 kfree(ata_force_tbl
);
6563 destroy_workqueue(ata_wq
);
6564 destroy_workqueue(ata_aux_wq
);
6567 subsys_initcall(ata_init
);
6568 module_exit(ata_exit
);
6570 static unsigned long ratelimit_time
;
6571 static DEFINE_SPINLOCK(ata_ratelimit_lock
);
6573 int ata_ratelimit(void)
6576 unsigned long flags
;
6578 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
6580 if (time_after(jiffies
, ratelimit_time
)) {
6582 ratelimit_time
= jiffies
+ (HZ
/5);
6586 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
6592 * ata_wait_register - wait until register value changes
6593 * @reg: IO-mapped register
6594 * @mask: Mask to apply to read register value
6595 * @val: Wait condition
6596 * @interval: polling interval in milliseconds
6597 * @timeout: timeout in milliseconds
6599 * Waiting for some bits of register to change is a common
6600 * operation for ATA controllers. This function reads 32bit LE
6601 * IO-mapped register @reg and tests for the following condition.
6603 * (*@reg & mask) != val
6605 * If the condition is met, it returns; otherwise, the process is
6606 * repeated after @interval_msec until timeout.
6609 * Kernel thread context (may sleep)
6612 * The final register value.
6614 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6615 unsigned long interval
, unsigned long timeout
)
6617 unsigned long deadline
;
6620 tmp
= ioread32(reg
);
6622 /* Calculate timeout _after_ the first read to make sure
6623 * preceding writes reach the controller before starting to
6624 * eat away the timeout.
6626 deadline
= ata_deadline(jiffies
, timeout
);
6628 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6630 tmp
= ioread32(reg
);
6639 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6641 return AC_ERR_SYSTEM
;
6644 static void ata_dummy_error_handler(struct ata_port
*ap
)
6649 struct ata_port_operations ata_dummy_port_ops
= {
6650 .qc_prep
= ata_noop_qc_prep
,
6651 .qc_issue
= ata_dummy_qc_issue
,
6652 .error_handler
= ata_dummy_error_handler
,
6655 const struct ata_port_info ata_dummy_port_info
= {
6656 .port_ops
= &ata_dummy_port_ops
,
6660 * libata is essentially a library of internal helper functions for
6661 * low-level ATA host controller drivers. As such, the API/ABI is
6662 * likely to change as new drivers are added and updated.
6663 * Do not depend on ABI/API stability.
6665 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6666 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6667 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6668 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6669 EXPORT_SYMBOL_GPL(sata_port_ops
);
6670 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6671 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6672 EXPORT_SYMBOL_GPL(ata_link_next
);
6673 EXPORT_SYMBOL_GPL(ata_dev_next
);
6674 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6675 EXPORT_SYMBOL_GPL(ata_host_init
);
6676 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6677 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6678 EXPORT_SYMBOL_GPL(ata_slave_link_init
);
6679 EXPORT_SYMBOL_GPL(ata_host_start
);
6680 EXPORT_SYMBOL_GPL(ata_host_register
);
6681 EXPORT_SYMBOL_GPL(ata_host_activate
);
6682 EXPORT_SYMBOL_GPL(ata_host_detach
);
6683 EXPORT_SYMBOL_GPL(ata_sg_init
);
6684 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6685 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6686 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6687 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6688 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6689 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6690 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6691 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6692 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6693 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6694 EXPORT_SYMBOL_GPL(ata_mode_string
);
6695 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6696 EXPORT_SYMBOL_GPL(ata_port_start
);
6697 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6698 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6699 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6700 EXPORT_SYMBOL_GPL(ata_port_probe
);
6701 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6702 EXPORT_SYMBOL_GPL(sata_set_spd
);
6703 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6704 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6705 EXPORT_SYMBOL_GPL(sata_link_resume
);
6706 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6707 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6708 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6709 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6710 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6711 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6712 EXPORT_SYMBOL_GPL(ata_port_disable
);
6713 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6714 EXPORT_SYMBOL_GPL(ata_wait_register
);
6715 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6716 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6717 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6718 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6719 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6720 EXPORT_SYMBOL_GPL(sata_scr_read
);
6721 EXPORT_SYMBOL_GPL(sata_scr_write
);
6722 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6723 EXPORT_SYMBOL_GPL(ata_link_online
);
6724 EXPORT_SYMBOL_GPL(ata_link_offline
);
6726 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6727 EXPORT_SYMBOL_GPL(ata_host_resume
);
6728 #endif /* CONFIG_PM */
6729 EXPORT_SYMBOL_GPL(ata_id_string
);
6730 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6731 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6732 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6734 EXPORT_SYMBOL_GPL(ata_pio_queue_task
);
6735 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6736 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6737 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6738 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6739 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6742 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6743 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6745 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6746 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6747 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6748 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6749 #endif /* CONFIG_PM */
6750 #endif /* CONFIG_PCI */
6752 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6753 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6754 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6755 EXPORT_SYMBOL_GPL(ata_port_desc
);
6757 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6758 #endif /* CONFIG_PCI */
6759 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6760 EXPORT_SYMBOL_GPL(ata_link_abort
);
6761 EXPORT_SYMBOL_GPL(ata_port_abort
);
6762 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6763 EXPORT_SYMBOL_GPL(sata_async_notification
);
6764 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6765 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6766 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6767 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6768 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6769 EXPORT_SYMBOL_GPL(ata_do_eh
);
6770 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6772 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6773 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6774 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6775 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6776 EXPORT_SYMBOL_GPL(ata_cable_sata
);