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 <linux/slab.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
73 /* debounce timing parameters in msecs { interval, duration, timeout } */
74 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
75 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
76 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
78 const struct ata_port_operations ata_base_port_ops
= {
79 .prereset
= ata_std_prereset
,
80 .postreset
= ata_std_postreset
,
81 .error_handler
= ata_std_error_handler
,
84 const struct ata_port_operations sata_port_ops
= {
85 .inherits
= &ata_base_port_ops
,
87 .qc_defer
= ata_std_qc_defer
,
88 .hardreset
= sata_std_hardreset
,
91 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
92 u16 heads
, u16 sectors
);
93 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
94 static unsigned int ata_dev_set_feature(struct ata_device
*dev
,
95 u8 enable
, u8 feature
);
96 static void ata_dev_xfermask(struct ata_device
*dev
);
97 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
99 unsigned int ata_print_id
= 1;
101 struct ata_force_param
{
105 unsigned long xfer_mask
;
106 unsigned int horkage_on
;
107 unsigned int horkage_off
;
111 struct ata_force_ent
{
114 struct ata_force_param param
;
117 static struct ata_force_ent
*ata_force_tbl
;
118 static int ata_force_tbl_size
;
120 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
121 /* param_buf is thrown away after initialization, disallow read */
122 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
123 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
125 static int atapi_enabled
= 1;
126 module_param(atapi_enabled
, int, 0444);
127 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
129 static int atapi_dmadir
= 0;
130 module_param(atapi_dmadir
, int, 0444);
131 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
133 int atapi_passthru16
= 1;
134 module_param(atapi_passthru16
, int, 0444);
135 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
138 module_param_named(fua
, libata_fua
, int, 0444);
139 MODULE_PARM_DESC(fua
, "FUA support (0=off [default], 1=on)");
141 static int ata_ignore_hpa
;
142 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
143 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
145 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
146 module_param_named(dma
, libata_dma_mask
, int, 0444);
147 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
149 static int ata_probe_timeout
;
150 module_param(ata_probe_timeout
, int, 0444);
151 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
153 int libata_noacpi
= 0;
154 module_param_named(noacpi
, libata_noacpi
, int, 0444);
155 MODULE_PARM_DESC(noacpi
, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
157 int libata_allow_tpm
= 0;
158 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
159 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands (0=off [default], 1=on)");
162 module_param(atapi_an
, int, 0444);
163 MODULE_PARM_DESC(atapi_an
, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
165 MODULE_AUTHOR("Jeff Garzik");
166 MODULE_DESCRIPTION("Library module for ATA devices");
167 MODULE_LICENSE("GPL");
168 MODULE_VERSION(DRV_VERSION
);
171 static bool ata_sstatus_online(u32 sstatus
)
173 return (sstatus
& 0xf) == 0x3;
177 * ata_link_next - link iteration helper
178 * @link: the previous link, NULL to start
179 * @ap: ATA port containing links to iterate
180 * @mode: iteration mode, one of ATA_LITER_*
183 * Host lock or EH context.
186 * Pointer to the next link.
188 struct ata_link
*ata_link_next(struct ata_link
*link
, struct ata_port
*ap
,
189 enum ata_link_iter_mode mode
)
191 BUG_ON(mode
!= ATA_LITER_EDGE
&&
192 mode
!= ATA_LITER_PMP_FIRST
&& mode
!= ATA_LITER_HOST_FIRST
);
194 /* NULL link indicates start of iteration */
198 case ATA_LITER_PMP_FIRST
:
199 if (sata_pmp_attached(ap
))
202 case ATA_LITER_HOST_FIRST
:
206 /* we just iterated over the host link, what's next? */
207 if (link
== &ap
->link
)
209 case ATA_LITER_HOST_FIRST
:
210 if (sata_pmp_attached(ap
))
213 case ATA_LITER_PMP_FIRST
:
214 if (unlikely(ap
->slave_link
))
215 return ap
->slave_link
;
221 /* slave_link excludes PMP */
222 if (unlikely(link
== ap
->slave_link
))
225 /* we were over a PMP link */
226 if (++link
< ap
->pmp_link
+ ap
->nr_pmp_links
)
229 if (mode
== ATA_LITER_PMP_FIRST
)
236 * ata_dev_next - device iteration helper
237 * @dev: the previous device, NULL to start
238 * @link: ATA link containing devices to iterate
239 * @mode: iteration mode, one of ATA_DITER_*
242 * Host lock or EH context.
245 * Pointer to the next device.
247 struct ata_device
*ata_dev_next(struct ata_device
*dev
, struct ata_link
*link
,
248 enum ata_dev_iter_mode mode
)
250 BUG_ON(mode
!= ATA_DITER_ENABLED
&& mode
!= ATA_DITER_ENABLED_REVERSE
&&
251 mode
!= ATA_DITER_ALL
&& mode
!= ATA_DITER_ALL_REVERSE
);
253 /* NULL dev indicates start of iteration */
256 case ATA_DITER_ENABLED
:
260 case ATA_DITER_ENABLED_REVERSE
:
261 case ATA_DITER_ALL_REVERSE
:
262 dev
= link
->device
+ ata_link_max_devices(link
) - 1;
267 /* move to the next one */
269 case ATA_DITER_ENABLED
:
271 if (++dev
< link
->device
+ ata_link_max_devices(link
))
274 case ATA_DITER_ENABLED_REVERSE
:
275 case ATA_DITER_ALL_REVERSE
:
276 if (--dev
>= link
->device
)
282 if ((mode
== ATA_DITER_ENABLED
|| mode
== ATA_DITER_ENABLED_REVERSE
) &&
283 !ata_dev_enabled(dev
))
289 * ata_dev_phys_link - find physical link for a device
290 * @dev: ATA device to look up physical link for
292 * Look up physical link which @dev is attached to. Note that
293 * this is different from @dev->link only when @dev is on slave
294 * link. For all other cases, it's the same as @dev->link.
300 * Pointer to the found physical link.
302 struct ata_link
*ata_dev_phys_link(struct ata_device
*dev
)
304 struct ata_port
*ap
= dev
->link
->ap
;
310 return ap
->slave_link
;
314 * ata_force_cbl - force cable type according to libata.force
315 * @ap: ATA port of interest
317 * Force cable type according to libata.force and whine about it.
318 * The last entry which has matching port number is used, so it
319 * can be specified as part of device force parameters. For
320 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
326 void ata_force_cbl(struct ata_port
*ap
)
330 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
331 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
333 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
336 if (fe
->param
.cbl
== ATA_CBL_NONE
)
339 ap
->cbl
= fe
->param
.cbl
;
340 ata_port_printk(ap
, KERN_NOTICE
,
341 "FORCE: cable set to %s\n", fe
->param
.name
);
347 * ata_force_link_limits - force link limits according to libata.force
348 * @link: ATA link of interest
350 * Force link flags and SATA spd limit according to libata.force
351 * and whine about it. When only the port part is specified
352 * (e.g. 1:), the limit applies to all links connected to both
353 * the host link and all fan-out ports connected via PMP. If the
354 * device part is specified as 0 (e.g. 1.00:), it specifies the
355 * first fan-out link not the host link. Device number 15 always
356 * points to the host link whether PMP is attached or not. If the
357 * controller has slave link, device number 16 points to it.
362 static void ata_force_link_limits(struct ata_link
*link
)
364 bool did_spd
= false;
365 int linkno
= link
->pmp
;
368 if (ata_is_host_link(link
))
371 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
372 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
374 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
377 if (fe
->device
!= -1 && fe
->device
!= linkno
)
380 /* only honor the first spd limit */
381 if (!did_spd
&& fe
->param
.spd_limit
) {
382 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
383 ata_link_printk(link
, KERN_NOTICE
,
384 "FORCE: PHY spd limit set to %s\n",
389 /* let lflags stack */
390 if (fe
->param
.lflags
) {
391 link
->flags
|= fe
->param
.lflags
;
392 ata_link_printk(link
, KERN_NOTICE
,
393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe
->param
.lflags
, link
->flags
);
400 * ata_force_xfermask - force xfermask according to libata.force
401 * @dev: ATA device of interest
403 * Force xfer_mask according to libata.force and whine about it.
404 * For consistency with link selection, device number 15 selects
405 * the first device connected to the host link.
410 static void ata_force_xfermask(struct ata_device
*dev
)
412 int devno
= dev
->link
->pmp
+ dev
->devno
;
413 int alt_devno
= devno
;
416 /* allow n.15/16 for devices attached to host port */
417 if (ata_is_host_link(dev
->link
))
420 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
421 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
422 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
424 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
427 if (fe
->device
!= -1 && fe
->device
!= devno
&&
428 fe
->device
!= alt_devno
)
431 if (!fe
->param
.xfer_mask
)
434 ata_unpack_xfermask(fe
->param
.xfer_mask
,
435 &pio_mask
, &mwdma_mask
, &udma_mask
);
437 dev
->udma_mask
= udma_mask
;
438 else if (mwdma_mask
) {
440 dev
->mwdma_mask
= mwdma_mask
;
444 dev
->pio_mask
= pio_mask
;
447 ata_dev_printk(dev
, KERN_NOTICE
,
448 "FORCE: xfer_mask set to %s\n", fe
->param
.name
);
454 * ata_force_horkage - force horkage according to libata.force
455 * @dev: ATA device of interest
457 * Force horkage according to libata.force and whine about it.
458 * For consistency with link selection, device number 15 selects
459 * the first device connected to the host link.
464 static void ata_force_horkage(struct ata_device
*dev
)
466 int devno
= dev
->link
->pmp
+ dev
->devno
;
467 int alt_devno
= devno
;
470 /* allow n.15/16 for devices attached to host port */
471 if (ata_is_host_link(dev
->link
))
474 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
475 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
477 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
480 if (fe
->device
!= -1 && fe
->device
!= devno
&&
481 fe
->device
!= alt_devno
)
484 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
485 !(dev
->horkage
& fe
->param
.horkage_off
))
488 dev
->horkage
|= fe
->param
.horkage_on
;
489 dev
->horkage
&= ~fe
->param
.horkage_off
;
491 ata_dev_printk(dev
, KERN_NOTICE
,
492 "FORCE: horkage modified (%s)\n", fe
->param
.name
);
497 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
498 * @opcode: SCSI opcode
500 * Determine ATAPI command type from @opcode.
506 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
508 int atapi_cmd_type(u8 opcode
)
517 case GPCMD_WRITE_AND_VERIFY_10
:
521 case GPCMD_READ_CD_MSF
:
522 return ATAPI_READ_CD
;
526 if (atapi_passthru16
)
527 return ATAPI_PASS_THRU
;
535 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
536 * @tf: Taskfile to convert
537 * @pmp: Port multiplier port
538 * @is_cmd: This FIS is for command
539 * @fis: Buffer into which data will output
541 * Converts a standard ATA taskfile to a Serial ATA
542 * FIS structure (Register - Host to Device).
545 * Inherited from caller.
547 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
549 fis
[0] = 0x27; /* Register - Host to Device FIS */
550 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
552 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
554 fis
[2] = tf
->command
;
555 fis
[3] = tf
->feature
;
562 fis
[8] = tf
->hob_lbal
;
563 fis
[9] = tf
->hob_lbam
;
564 fis
[10] = tf
->hob_lbah
;
565 fis
[11] = tf
->hob_feature
;
568 fis
[13] = tf
->hob_nsect
;
579 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
580 * @fis: Buffer from which data will be input
581 * @tf: Taskfile to output
583 * Converts a serial ATA FIS structure to a standard ATA taskfile.
586 * Inherited from caller.
589 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
591 tf
->command
= fis
[2]; /* status */
592 tf
->feature
= fis
[3]; /* error */
599 tf
->hob_lbal
= fis
[8];
600 tf
->hob_lbam
= fis
[9];
601 tf
->hob_lbah
= fis
[10];
604 tf
->hob_nsect
= fis
[13];
607 static const u8 ata_rw_cmds
[] = {
611 ATA_CMD_READ_MULTI_EXT
,
612 ATA_CMD_WRITE_MULTI_EXT
,
616 ATA_CMD_WRITE_MULTI_FUA_EXT
,
620 ATA_CMD_PIO_READ_EXT
,
621 ATA_CMD_PIO_WRITE_EXT
,
634 ATA_CMD_WRITE_FUA_EXT
638 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
639 * @tf: command to examine and configure
640 * @dev: device tf belongs to
642 * Examine the device configuration and tf->flags to calculate
643 * the proper read/write commands and protocol to use.
648 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
652 int index
, fua
, lba48
, write
;
654 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
655 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
656 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
658 if (dev
->flags
& ATA_DFLAG_PIO
) {
659 tf
->protocol
= ATA_PROT_PIO
;
660 index
= dev
->multi_count
? 0 : 8;
661 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
662 /* Unable to use DMA due to host limitation */
663 tf
->protocol
= ATA_PROT_PIO
;
664 index
= dev
->multi_count
? 0 : 8;
666 tf
->protocol
= ATA_PROT_DMA
;
670 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
679 * ata_tf_read_block - Read block address from ATA taskfile
680 * @tf: ATA taskfile of interest
681 * @dev: ATA device @tf belongs to
686 * Read block address from @tf. This function can handle all
687 * three address formats - LBA, LBA48 and CHS. tf->protocol and
688 * flags select the address format to use.
691 * Block address read from @tf.
693 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
697 if (tf
->flags
& ATA_TFLAG_LBA
) {
698 if (tf
->flags
& ATA_TFLAG_LBA48
) {
699 block
|= (u64
)tf
->hob_lbah
<< 40;
700 block
|= (u64
)tf
->hob_lbam
<< 32;
701 block
|= (u64
)tf
->hob_lbal
<< 24;
703 block
|= (tf
->device
& 0xf) << 24;
705 block
|= tf
->lbah
<< 16;
706 block
|= tf
->lbam
<< 8;
711 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
712 head
= tf
->device
& 0xf;
716 ata_dev_printk(dev
, KERN_WARNING
, "device reported "
717 "invalid CHS sector 0\n");
718 sect
= 1; /* oh well */
721 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
- 1;
728 * ata_build_rw_tf - Build ATA taskfile for given read/write request
729 * @tf: Target ATA taskfile
730 * @dev: ATA device @tf belongs to
731 * @block: Block address
732 * @n_block: Number of blocks
733 * @tf_flags: RW/FUA etc...
739 * Build ATA taskfile @tf for read/write request described by
740 * @block, @n_block, @tf_flags and @tag on @dev.
744 * 0 on success, -ERANGE if the request is too large for @dev,
745 * -EINVAL if the request is invalid.
747 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
748 u64 block
, u32 n_block
, unsigned int tf_flags
,
751 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
752 tf
->flags
|= tf_flags
;
754 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
756 if (!lba_48_ok(block
, n_block
))
759 tf
->protocol
= ATA_PROT_NCQ
;
760 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
762 if (tf
->flags
& ATA_TFLAG_WRITE
)
763 tf
->command
= ATA_CMD_FPDMA_WRITE
;
765 tf
->command
= ATA_CMD_FPDMA_READ
;
767 tf
->nsect
= tag
<< 3;
768 tf
->hob_feature
= (n_block
>> 8) & 0xff;
769 tf
->feature
= n_block
& 0xff;
771 tf
->hob_lbah
= (block
>> 40) & 0xff;
772 tf
->hob_lbam
= (block
>> 32) & 0xff;
773 tf
->hob_lbal
= (block
>> 24) & 0xff;
774 tf
->lbah
= (block
>> 16) & 0xff;
775 tf
->lbam
= (block
>> 8) & 0xff;
776 tf
->lbal
= block
& 0xff;
779 if (tf
->flags
& ATA_TFLAG_FUA
)
780 tf
->device
|= 1 << 7;
781 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
782 tf
->flags
|= ATA_TFLAG_LBA
;
784 if (lba_28_ok(block
, n_block
)) {
786 tf
->device
|= (block
>> 24) & 0xf;
787 } else if (lba_48_ok(block
, n_block
)) {
788 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
792 tf
->flags
|= ATA_TFLAG_LBA48
;
794 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
796 tf
->hob_lbah
= (block
>> 40) & 0xff;
797 tf
->hob_lbam
= (block
>> 32) & 0xff;
798 tf
->hob_lbal
= (block
>> 24) & 0xff;
800 /* request too large even for LBA48 */
803 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
806 tf
->nsect
= n_block
& 0xff;
808 tf
->lbah
= (block
>> 16) & 0xff;
809 tf
->lbam
= (block
>> 8) & 0xff;
810 tf
->lbal
= block
& 0xff;
812 tf
->device
|= ATA_LBA
;
815 u32 sect
, head
, cyl
, track
;
817 /* The request -may- be too large for CHS addressing. */
818 if (!lba_28_ok(block
, n_block
))
821 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
824 /* Convert LBA to CHS */
825 track
= (u32
)block
/ dev
->sectors
;
826 cyl
= track
/ dev
->heads
;
827 head
= track
% dev
->heads
;
828 sect
= (u32
)block
% dev
->sectors
+ 1;
830 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
831 (u32
)block
, track
, cyl
, head
, sect
);
833 /* Check whether the converted CHS can fit.
837 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
840 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
851 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
852 * @pio_mask: pio_mask
853 * @mwdma_mask: mwdma_mask
854 * @udma_mask: udma_mask
856 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
857 * unsigned int xfer_mask.
865 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
866 unsigned long mwdma_mask
,
867 unsigned long udma_mask
)
869 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
870 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
871 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
875 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
876 * @xfer_mask: xfer_mask to unpack
877 * @pio_mask: resulting pio_mask
878 * @mwdma_mask: resulting mwdma_mask
879 * @udma_mask: resulting udma_mask
881 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
882 * Any NULL distination masks will be ignored.
884 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
885 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
888 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
890 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
892 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
895 static const struct ata_xfer_ent
{
899 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
900 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
901 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
906 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
907 * @xfer_mask: xfer_mask of interest
909 * Return matching XFER_* value for @xfer_mask. Only the highest
910 * bit of @xfer_mask is considered.
916 * Matching XFER_* value, 0xff if no match found.
918 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
920 int highbit
= fls(xfer_mask
) - 1;
921 const struct ata_xfer_ent
*ent
;
923 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
924 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
925 return ent
->base
+ highbit
- ent
->shift
;
930 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
931 * @xfer_mode: XFER_* of interest
933 * Return matching xfer_mask for @xfer_mode.
939 * Matching xfer_mask, 0 if no match found.
941 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
943 const struct ata_xfer_ent
*ent
;
945 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
946 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
947 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
948 & ~((1 << ent
->shift
) - 1);
953 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
954 * @xfer_mode: XFER_* of interest
956 * Return matching xfer_shift for @xfer_mode.
962 * Matching xfer_shift, -1 if no match found.
964 int ata_xfer_mode2shift(unsigned long xfer_mode
)
966 const struct ata_xfer_ent
*ent
;
968 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
969 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
975 * ata_mode_string - convert xfer_mask to string
976 * @xfer_mask: mask of bits supported; only highest bit counts.
978 * Determine string which represents the highest speed
979 * (highest bit in @modemask).
985 * Constant C string representing highest speed listed in
986 * @mode_mask, or the constant C string "<n/a>".
988 const char *ata_mode_string(unsigned long xfer_mask
)
990 static const char * const xfer_mode_str
[] = {
1014 highbit
= fls(xfer_mask
) - 1;
1015 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
1016 return xfer_mode_str
[highbit
];
1020 static const char *sata_spd_string(unsigned int spd
)
1022 static const char * const spd_str
[] = {
1028 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
1030 return spd_str
[spd
- 1];
1033 static int ata_dev_set_dipm(struct ata_device
*dev
, enum link_pm policy
)
1035 struct ata_link
*link
= dev
->link
;
1036 struct ata_port
*ap
= link
->ap
;
1038 unsigned int err_mask
;
1042 * disallow DIPM for drivers which haven't set
1043 * ATA_FLAG_IPM. This is because when DIPM is enabled,
1044 * phy ready will be set in the interrupt status on
1045 * state changes, which will cause some drivers to
1046 * think there are errors - additionally drivers will
1047 * need to disable hot plug.
1049 if (!(ap
->flags
& ATA_FLAG_IPM
) || !ata_dev_enabled(dev
)) {
1050 ap
->pm_policy
= NOT_AVAILABLE
;
1055 * For DIPM, we will only enable it for the
1056 * min_power setting.
1058 * Why? Because Disks are too stupid to know that
1059 * If the host rejects a request to go to SLUMBER
1060 * they should retry at PARTIAL, and instead it
1061 * just would give up. So, for medium_power to
1062 * work at all, we need to only allow HIPM.
1064 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
1070 /* no restrictions on IPM transitions */
1071 scontrol
&= ~(0x3 << 8);
1072 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1077 if (dev
->flags
& ATA_DFLAG_DIPM
)
1078 err_mask
= ata_dev_set_feature(dev
,
1079 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
1082 /* allow IPM to PARTIAL */
1083 scontrol
&= ~(0x1 << 8);
1084 scontrol
|= (0x2 << 8);
1085 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1090 * we don't have to disable DIPM since IPM flags
1091 * disallow transitions to SLUMBER, which effectively
1092 * disable DIPM if it does not support PARTIAL
1096 case MAX_PERFORMANCE
:
1097 /* disable all IPM transitions */
1098 scontrol
|= (0x3 << 8);
1099 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
1104 * we don't have to disable DIPM since IPM flags
1105 * disallow all transitions which effectively
1106 * disable DIPM anyway.
1111 /* FIXME: handle SET FEATURES failure */
1118 * ata_dev_enable_pm - enable SATA interface power management
1119 * @dev: device to enable power management
1120 * @policy: the link power management policy
1122 * Enable SATA Interface power management. This will enable
1123 * Device Interface Power Management (DIPM) for min_power
1124 * policy, and then call driver specific callbacks for
1125 * enabling Host Initiated Power management.
1128 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1130 void ata_dev_enable_pm(struct ata_device
*dev
, enum link_pm policy
)
1133 struct ata_port
*ap
= dev
->link
->ap
;
1135 /* set HIPM first, then DIPM */
1136 if (ap
->ops
->enable_pm
)
1137 rc
= ap
->ops
->enable_pm(ap
, policy
);
1140 rc
= ata_dev_set_dipm(dev
, policy
);
1144 ap
->pm_policy
= MAX_PERFORMANCE
;
1146 ap
->pm_policy
= policy
;
1147 return /* rc */; /* hopefully we can use 'rc' eventually */
1152 * ata_dev_disable_pm - disable SATA interface power management
1153 * @dev: device to disable power management
1155 * Disable SATA Interface power management. This will disable
1156 * Device Interface Power Management (DIPM) without changing
1157 * policy, call driver specific callbacks for disabling Host
1158 * Initiated Power management.
1163 static void ata_dev_disable_pm(struct ata_device
*dev
)
1165 struct ata_port
*ap
= dev
->link
->ap
;
1167 ata_dev_set_dipm(dev
, MAX_PERFORMANCE
);
1168 if (ap
->ops
->disable_pm
)
1169 ap
->ops
->disable_pm(ap
);
1171 #endif /* CONFIG_PM */
1173 void ata_lpm_schedule(struct ata_port
*ap
, enum link_pm policy
)
1175 ap
->pm_policy
= policy
;
1176 ap
->link
.eh_info
.action
|= ATA_EH_LPM
;
1177 ap
->link
.eh_info
.flags
|= ATA_EHI_NO_AUTOPSY
;
1178 ata_port_schedule_eh(ap
);
1182 static void ata_lpm_enable(struct ata_host
*host
)
1184 struct ata_link
*link
;
1185 struct ata_port
*ap
;
1186 struct ata_device
*dev
;
1189 for (i
= 0; i
< host
->n_ports
; i
++) {
1190 ap
= host
->ports
[i
];
1191 ata_for_each_link(link
, ap
, EDGE
) {
1192 ata_for_each_dev(dev
, link
, ALL
)
1193 ata_dev_disable_pm(dev
);
1198 static void ata_lpm_disable(struct ata_host
*host
)
1202 for (i
= 0; i
< host
->n_ports
; i
++) {
1203 struct ata_port
*ap
= host
->ports
[i
];
1204 ata_lpm_schedule(ap
, ap
->pm_policy
);
1207 #endif /* CONFIG_PM */
1210 * ata_dev_classify - determine device type based on ATA-spec signature
1211 * @tf: ATA taskfile register set for device to be identified
1213 * Determine from taskfile register contents whether a device is
1214 * ATA or ATAPI, as per "Signature and persistence" section
1215 * of ATA/PI spec (volume 1, sect 5.14).
1221 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1222 * %ATA_DEV_UNKNOWN the event of failure.
1224 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1226 /* Apple's open source Darwin code hints that some devices only
1227 * put a proper signature into the LBA mid/high registers,
1228 * So, we only check those. It's sufficient for uniqueness.
1230 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1231 * signatures for ATA and ATAPI devices attached on SerialATA,
1232 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1233 * spec has never mentioned about using different signatures
1234 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1235 * Multiplier specification began to use 0x69/0x96 to identify
1236 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1237 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1238 * 0x69/0x96 shortly and described them as reserved for
1241 * We follow the current spec and consider that 0x69/0x96
1242 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1243 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1244 * SEMB signature. This is worked around in
1245 * ata_dev_read_id().
1247 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1248 DPRINTK("found ATA device by sig\n");
1252 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1253 DPRINTK("found ATAPI device by sig\n");
1254 return ATA_DEV_ATAPI
;
1257 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1258 DPRINTK("found PMP device by sig\n");
1262 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1263 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1264 return ATA_DEV_SEMB
;
1267 DPRINTK("unknown device\n");
1268 return ATA_DEV_UNKNOWN
;
1272 * ata_id_string - Convert IDENTIFY DEVICE page into string
1273 * @id: IDENTIFY DEVICE results we will examine
1274 * @s: string into which data is output
1275 * @ofs: offset into identify device page
1276 * @len: length of string to return. must be an even number.
1278 * The strings in the IDENTIFY DEVICE page are broken up into
1279 * 16-bit chunks. Run through the string, and output each
1280 * 8-bit chunk linearly, regardless of platform.
1286 void ata_id_string(const u16
*id
, unsigned char *s
,
1287 unsigned int ofs
, unsigned int len
)
1308 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1309 * @id: IDENTIFY DEVICE results we will examine
1310 * @s: string into which data is output
1311 * @ofs: offset into identify device page
1312 * @len: length of string to return. must be an odd number.
1314 * This function is identical to ata_id_string except that it
1315 * trims trailing spaces and terminates the resulting string with
1316 * null. @len must be actual maximum length (even number) + 1.
1321 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1322 unsigned int ofs
, unsigned int len
)
1326 ata_id_string(id
, s
, ofs
, len
- 1);
1328 p
= s
+ strnlen(s
, len
- 1);
1329 while (p
> s
&& p
[-1] == ' ')
1334 static u64
ata_id_n_sectors(const u16
*id
)
1336 if (ata_id_has_lba(id
)) {
1337 if (ata_id_has_lba48(id
))
1338 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1340 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1342 if (ata_id_current_chs_valid(id
))
1343 return id
[ATA_ID_CUR_CYLS
] * id
[ATA_ID_CUR_HEADS
] *
1344 id
[ATA_ID_CUR_SECTORS
];
1346 return id
[ATA_ID_CYLS
] * id
[ATA_ID_HEADS
] *
1351 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1355 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1356 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1357 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1358 sectors
|= (tf
->lbah
& 0xff) << 16;
1359 sectors
|= (tf
->lbam
& 0xff) << 8;
1360 sectors
|= (tf
->lbal
& 0xff);
1365 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1369 sectors
|= (tf
->device
& 0x0f) << 24;
1370 sectors
|= (tf
->lbah
& 0xff) << 16;
1371 sectors
|= (tf
->lbam
& 0xff) << 8;
1372 sectors
|= (tf
->lbal
& 0xff);
1378 * ata_read_native_max_address - Read native max address
1379 * @dev: target device
1380 * @max_sectors: out parameter for the result native max address
1382 * Perform an LBA48 or LBA28 native size query upon the device in
1386 * 0 on success, -EACCES if command is aborted by the drive.
1387 * -EIO on other errors.
1389 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1391 unsigned int err_mask
;
1392 struct ata_taskfile tf
;
1393 int lba48
= ata_id_has_lba48(dev
->id
);
1395 ata_tf_init(dev
, &tf
);
1397 /* always clear all address registers */
1398 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1401 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1402 tf
.flags
|= ATA_TFLAG_LBA48
;
1404 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1406 tf
.protocol
|= ATA_PROT_NODATA
;
1407 tf
.device
|= ATA_LBA
;
1409 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1411 ata_dev_printk(dev
, KERN_WARNING
, "failed to read native "
1412 "max address (err_mask=0x%x)\n", err_mask
);
1413 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1419 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1421 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1422 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1428 * ata_set_max_sectors - Set max sectors
1429 * @dev: target device
1430 * @new_sectors: new max sectors value to set for the device
1432 * Set max sectors of @dev to @new_sectors.
1435 * 0 on success, -EACCES if command is aborted or denied (due to
1436 * previous non-volatile SET_MAX) by the drive. -EIO on other
1439 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1441 unsigned int err_mask
;
1442 struct ata_taskfile tf
;
1443 int lba48
= ata_id_has_lba48(dev
->id
);
1447 ata_tf_init(dev
, &tf
);
1449 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1452 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1453 tf
.flags
|= ATA_TFLAG_LBA48
;
1455 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1456 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1457 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1459 tf
.command
= ATA_CMD_SET_MAX
;
1461 tf
.device
|= (new_sectors
>> 24) & 0xf;
1464 tf
.protocol
|= ATA_PROT_NODATA
;
1465 tf
.device
|= ATA_LBA
;
1467 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1468 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1469 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1471 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1473 ata_dev_printk(dev
, KERN_WARNING
, "failed to set "
1474 "max address (err_mask=0x%x)\n", err_mask
);
1475 if (err_mask
== AC_ERR_DEV
&&
1476 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1485 * ata_hpa_resize - Resize a device with an HPA set
1486 * @dev: Device to resize
1488 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1489 * it if required to the full size of the media. The caller must check
1490 * the drive has the HPA feature set enabled.
1493 * 0 on success, -errno on failure.
1495 static int ata_hpa_resize(struct ata_device
*dev
)
1497 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1498 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1499 bool unlock_hpa
= ata_ignore_hpa
|| dev
->flags
& ATA_DFLAG_UNLOCK_HPA
;
1500 u64 sectors
= ata_id_n_sectors(dev
->id
);
1504 /* do we need to do it? */
1505 if (dev
->class != ATA_DEV_ATA
||
1506 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1507 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1510 /* read native max address */
1511 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1513 /* If device aborted the command or HPA isn't going to
1514 * be unlocked, skip HPA resizing.
1516 if (rc
== -EACCES
|| !unlock_hpa
) {
1517 ata_dev_printk(dev
, KERN_WARNING
, "HPA support seems "
1518 "broken, skipping HPA handling\n");
1519 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1521 /* we can continue if device aborted the command */
1528 dev
->n_native_sectors
= native_sectors
;
1530 /* nothing to do? */
1531 if (native_sectors
<= sectors
|| !unlock_hpa
) {
1532 if (!print_info
|| native_sectors
== sectors
)
1535 if (native_sectors
> sectors
)
1536 ata_dev_printk(dev
, KERN_INFO
,
1537 "HPA detected: current %llu, native %llu\n",
1538 (unsigned long long)sectors
,
1539 (unsigned long long)native_sectors
);
1540 else if (native_sectors
< sectors
)
1541 ata_dev_printk(dev
, KERN_WARNING
,
1542 "native sectors (%llu) is smaller than "
1544 (unsigned long long)native_sectors
,
1545 (unsigned long long)sectors
);
1549 /* let's unlock HPA */
1550 rc
= ata_set_max_sectors(dev
, native_sectors
);
1551 if (rc
== -EACCES
) {
1552 /* if device aborted the command, skip HPA resizing */
1553 ata_dev_printk(dev
, KERN_WARNING
, "device aborted resize "
1554 "(%llu -> %llu), skipping HPA handling\n",
1555 (unsigned long long)sectors
,
1556 (unsigned long long)native_sectors
);
1557 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1562 /* re-read IDENTIFY data */
1563 rc
= ata_dev_reread_id(dev
, 0);
1565 ata_dev_printk(dev
, KERN_ERR
, "failed to re-read IDENTIFY "
1566 "data after HPA resizing\n");
1571 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1572 ata_dev_printk(dev
, KERN_INFO
,
1573 "HPA unlocked: %llu -> %llu, native %llu\n",
1574 (unsigned long long)sectors
,
1575 (unsigned long long)new_sectors
,
1576 (unsigned long long)native_sectors
);
1583 * ata_dump_id - IDENTIFY DEVICE info debugging output
1584 * @id: IDENTIFY DEVICE page to dump
1586 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1593 static inline void ata_dump_id(const u16
*id
)
1595 DPRINTK("49==0x%04x "
1605 DPRINTK("80==0x%04x "
1615 DPRINTK("88==0x%04x "
1622 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1623 * @id: IDENTIFY data to compute xfer mask from
1625 * Compute the xfermask for this device. This is not as trivial
1626 * as it seems if we must consider early devices correctly.
1628 * FIXME: pre IDE drive timing (do we care ?).
1636 unsigned long ata_id_xfermask(const u16
*id
)
1638 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1640 /* Usual case. Word 53 indicates word 64 is valid */
1641 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1642 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1646 /* If word 64 isn't valid then Word 51 high byte holds
1647 * the PIO timing number for the maximum. Turn it into
1650 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1651 if (mode
< 5) /* Valid PIO range */
1652 pio_mask
= (2 << mode
) - 1;
1656 /* But wait.. there's more. Design your standards by
1657 * committee and you too can get a free iordy field to
1658 * process. However its the speeds not the modes that
1659 * are supported... Note drivers using the timing API
1660 * will get this right anyway
1664 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1666 if (ata_id_is_cfa(id
)) {
1668 * Process compact flash extended modes
1670 int pio
= (id
[ATA_ID_CFA_MODES
] >> 0) & 0x7;
1671 int dma
= (id
[ATA_ID_CFA_MODES
] >> 3) & 0x7;
1674 pio_mask
|= (1 << 5);
1676 pio_mask
|= (1 << 6);
1678 mwdma_mask
|= (1 << 3);
1680 mwdma_mask
|= (1 << 4);
1684 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1685 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1687 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1690 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1692 struct completion
*waiting
= qc
->private_data
;
1698 * ata_exec_internal_sg - execute libata internal command
1699 * @dev: Device to which the command is sent
1700 * @tf: Taskfile registers for the command and the result
1701 * @cdb: CDB for packet command
1702 * @dma_dir: Data tranfer direction of the command
1703 * @sgl: sg list for the data buffer of the command
1704 * @n_elem: Number of sg entries
1705 * @timeout: Timeout in msecs (0 for default)
1707 * Executes libata internal command with timeout. @tf contains
1708 * command on entry and result on return. Timeout and error
1709 * conditions are reported via return value. No recovery action
1710 * is taken after a command times out. It's caller's duty to
1711 * clean up after timeout.
1714 * None. Should be called with kernel context, might sleep.
1717 * Zero on success, AC_ERR_* mask on failure
1719 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1720 struct ata_taskfile
*tf
, const u8
*cdb
,
1721 int dma_dir
, struct scatterlist
*sgl
,
1722 unsigned int n_elem
, unsigned long timeout
)
1724 struct ata_link
*link
= dev
->link
;
1725 struct ata_port
*ap
= link
->ap
;
1726 u8 command
= tf
->command
;
1727 int auto_timeout
= 0;
1728 struct ata_queued_cmd
*qc
;
1729 unsigned int tag
, preempted_tag
;
1730 u32 preempted_sactive
, preempted_qc_active
;
1731 int preempted_nr_active_links
;
1732 DECLARE_COMPLETION_ONSTACK(wait
);
1733 unsigned long flags
;
1734 unsigned int err_mask
;
1737 spin_lock_irqsave(ap
->lock
, flags
);
1739 /* no internal command while frozen */
1740 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1741 spin_unlock_irqrestore(ap
->lock
, flags
);
1742 return AC_ERR_SYSTEM
;
1745 /* initialize internal qc */
1747 /* XXX: Tag 0 is used for drivers with legacy EH as some
1748 * drivers choke if any other tag is given. This breaks
1749 * ata_tag_internal() test for those drivers. Don't use new
1750 * EH stuff without converting to it.
1752 if (ap
->ops
->error_handler
)
1753 tag
= ATA_TAG_INTERNAL
;
1757 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1759 qc
= __ata_qc_from_tag(ap
, tag
);
1767 preempted_tag
= link
->active_tag
;
1768 preempted_sactive
= link
->sactive
;
1769 preempted_qc_active
= ap
->qc_active
;
1770 preempted_nr_active_links
= ap
->nr_active_links
;
1771 link
->active_tag
= ATA_TAG_POISON
;
1774 ap
->nr_active_links
= 0;
1776 /* prepare & issue qc */
1779 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1780 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1781 qc
->dma_dir
= dma_dir
;
1782 if (dma_dir
!= DMA_NONE
) {
1783 unsigned int i
, buflen
= 0;
1784 struct scatterlist
*sg
;
1786 for_each_sg(sgl
, sg
, n_elem
, i
)
1787 buflen
+= sg
->length
;
1789 ata_sg_init(qc
, sgl
, n_elem
);
1790 qc
->nbytes
= buflen
;
1793 qc
->private_data
= &wait
;
1794 qc
->complete_fn
= ata_qc_complete_internal
;
1798 spin_unlock_irqrestore(ap
->lock
, flags
);
1801 if (ata_probe_timeout
)
1802 timeout
= ata_probe_timeout
* 1000;
1804 timeout
= ata_internal_cmd_timeout(dev
, command
);
1809 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1811 ata_sff_flush_pio_task(ap
);
1814 spin_lock_irqsave(ap
->lock
, flags
);
1816 /* We're racing with irq here. If we lose, the
1817 * following test prevents us from completing the qc
1818 * twice. If we win, the port is frozen and will be
1819 * cleaned up by ->post_internal_cmd().
1821 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1822 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1824 if (ap
->ops
->error_handler
)
1825 ata_port_freeze(ap
);
1827 ata_qc_complete(qc
);
1829 if (ata_msg_warn(ap
))
1830 ata_dev_printk(dev
, KERN_WARNING
,
1831 "qc timeout (cmd 0x%x)\n", command
);
1834 spin_unlock_irqrestore(ap
->lock
, flags
);
1837 /* do post_internal_cmd */
1838 if (ap
->ops
->post_internal_cmd
)
1839 ap
->ops
->post_internal_cmd(qc
);
1841 /* perform minimal error analysis */
1842 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1843 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1844 qc
->err_mask
|= AC_ERR_DEV
;
1847 qc
->err_mask
|= AC_ERR_OTHER
;
1849 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1850 qc
->err_mask
&= ~AC_ERR_OTHER
;
1854 spin_lock_irqsave(ap
->lock
, flags
);
1856 *tf
= qc
->result_tf
;
1857 err_mask
= qc
->err_mask
;
1860 link
->active_tag
= preempted_tag
;
1861 link
->sactive
= preempted_sactive
;
1862 ap
->qc_active
= preempted_qc_active
;
1863 ap
->nr_active_links
= preempted_nr_active_links
;
1865 spin_unlock_irqrestore(ap
->lock
, flags
);
1867 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1868 ata_internal_cmd_timed_out(dev
, command
);
1874 * ata_exec_internal - execute libata internal command
1875 * @dev: Device to which the command is sent
1876 * @tf: Taskfile registers for the command and the result
1877 * @cdb: CDB for packet command
1878 * @dma_dir: Data tranfer direction of the command
1879 * @buf: Data buffer of the command
1880 * @buflen: Length of data buffer
1881 * @timeout: Timeout in msecs (0 for default)
1883 * Wrapper around ata_exec_internal_sg() which takes simple
1884 * buffer instead of sg list.
1887 * None. Should be called with kernel context, might sleep.
1890 * Zero on success, AC_ERR_* mask on failure
1892 unsigned ata_exec_internal(struct ata_device
*dev
,
1893 struct ata_taskfile
*tf
, const u8
*cdb
,
1894 int dma_dir
, void *buf
, unsigned int buflen
,
1895 unsigned long timeout
)
1897 struct scatterlist
*psg
= NULL
, sg
;
1898 unsigned int n_elem
= 0;
1900 if (dma_dir
!= DMA_NONE
) {
1902 sg_init_one(&sg
, buf
, buflen
);
1907 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1912 * ata_do_simple_cmd - execute simple internal command
1913 * @dev: Device to which the command is sent
1914 * @cmd: Opcode to execute
1916 * Execute a 'simple' command, that only consists of the opcode
1917 * 'cmd' itself, without filling any other registers
1920 * Kernel thread context (may sleep).
1923 * Zero on success, AC_ERR_* mask on failure
1925 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1927 struct ata_taskfile tf
;
1929 ata_tf_init(dev
, &tf
);
1932 tf
.flags
|= ATA_TFLAG_DEVICE
;
1933 tf
.protocol
= ATA_PROT_NODATA
;
1935 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1939 * ata_pio_need_iordy - check if iordy needed
1942 * Check if the current speed of the device requires IORDY. Used
1943 * by various controllers for chip configuration.
1945 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1947 /* Don't set IORDY if we're preparing for reset. IORDY may
1948 * lead to controller lock up on certain controllers if the
1949 * port is not occupied. See bko#11703 for details.
1951 if (adev
->link
->ap
->pflags
& ATA_PFLAG_RESETTING
)
1953 /* Controller doesn't support IORDY. Probably a pointless
1954 * check as the caller should know this.
1956 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1958 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1959 if (ata_id_is_cfa(adev
->id
)
1960 && (adev
->pio_mode
== XFER_PIO_5
|| adev
->pio_mode
== XFER_PIO_6
))
1962 /* PIO3 and higher it is mandatory */
1963 if (adev
->pio_mode
> XFER_PIO_2
)
1965 /* We turn it on when possible */
1966 if (ata_id_has_iordy(adev
->id
))
1972 * ata_pio_mask_no_iordy - Return the non IORDY mask
1975 * Compute the highest mode possible if we are not using iordy. Return
1976 * -1 if no iordy mode is available.
1978 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1980 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1981 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1982 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1983 /* Is the speed faster than the drive allows non IORDY ? */
1985 /* This is cycle times not frequency - watch the logic! */
1986 if (pio
> 240) /* PIO2 is 240nS per cycle */
1987 return 3 << ATA_SHIFT_PIO
;
1988 return 7 << ATA_SHIFT_PIO
;
1991 return 3 << ATA_SHIFT_PIO
;
1995 * ata_do_dev_read_id - default ID read method
1997 * @tf: proposed taskfile
2000 * Issue the identify taskfile and hand back the buffer containing
2001 * identify data. For some RAID controllers and for pre ATA devices
2002 * this function is wrapped or replaced by the driver
2004 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
2005 struct ata_taskfile
*tf
, u16
*id
)
2007 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
2008 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
2012 * ata_dev_read_id - Read ID data from the specified device
2013 * @dev: target device
2014 * @p_class: pointer to class of the target device (may be changed)
2015 * @flags: ATA_READID_* flags
2016 * @id: buffer to read IDENTIFY data into
2018 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2019 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2020 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2021 * for pre-ATA4 drives.
2023 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2024 * now we abort if we hit that case.
2027 * Kernel thread context (may sleep)
2030 * 0 on success, -errno otherwise.
2032 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
2033 unsigned int flags
, u16
*id
)
2035 struct ata_port
*ap
= dev
->link
->ap
;
2036 unsigned int class = *p_class
;
2037 struct ata_taskfile tf
;
2038 unsigned int err_mask
= 0;
2040 bool is_semb
= class == ATA_DEV_SEMB
;
2041 int may_fallback
= 1, tried_spinup
= 0;
2044 if (ata_msg_ctl(ap
))
2045 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2048 ata_tf_init(dev
, &tf
);
2052 class = ATA_DEV_ATA
; /* some hard drives report SEMB sig */
2054 tf
.command
= ATA_CMD_ID_ATA
;
2057 tf
.command
= ATA_CMD_ID_ATAPI
;
2061 reason
= "unsupported class";
2065 tf
.protocol
= ATA_PROT_PIO
;
2067 /* Some devices choke if TF registers contain garbage. Make
2068 * sure those are properly initialized.
2070 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2072 /* Device presence detection is unreliable on some
2073 * controllers. Always poll IDENTIFY if available.
2075 tf
.flags
|= ATA_TFLAG_POLLING
;
2077 if (ap
->ops
->read_id
)
2078 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
2080 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
2083 if (err_mask
& AC_ERR_NODEV_HINT
) {
2084 ata_dev_printk(dev
, KERN_DEBUG
,
2085 "NODEV after polling detection\n");
2090 ata_dev_printk(dev
, KERN_INFO
, "IDENTIFY failed on "
2091 "device w/ SEMB sig, disabled\n");
2092 /* SEMB is not supported yet */
2093 *p_class
= ATA_DEV_SEMB_UNSUP
;
2097 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
2098 /* Device or controller might have reported
2099 * the wrong device class. Give a shot at the
2100 * other IDENTIFY if the current one is
2101 * aborted by the device.
2106 if (class == ATA_DEV_ATA
)
2107 class = ATA_DEV_ATAPI
;
2109 class = ATA_DEV_ATA
;
2113 /* Control reaches here iff the device aborted
2114 * both flavors of IDENTIFYs which happens
2115 * sometimes with phantom devices.
2117 ata_dev_printk(dev
, KERN_DEBUG
,
2118 "both IDENTIFYs aborted, assuming NODEV\n");
2123 reason
= "I/O error";
2127 if (dev
->horkage
& ATA_HORKAGE_DUMP_ID
) {
2128 ata_dev_printk(dev
, KERN_DEBUG
, "dumping IDENTIFY data, "
2129 "class=%d may_fallback=%d tried_spinup=%d\n",
2130 class, may_fallback
, tried_spinup
);
2131 print_hex_dump(KERN_DEBUG
, "", DUMP_PREFIX_OFFSET
,
2132 16, 2, id
, ATA_ID_WORDS
* sizeof(*id
), true);
2135 /* Falling back doesn't make sense if ID data was read
2136 * successfully at least once.
2140 swap_buf_le16(id
, ATA_ID_WORDS
);
2144 reason
= "device reports invalid type";
2146 if (class == ATA_DEV_ATA
) {
2147 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
2150 if (ata_id_is_ata(id
))
2154 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
2157 * Drive powered-up in standby mode, and requires a specific
2158 * SET_FEATURES spin-up subcommand before it will accept
2159 * anything other than the original IDENTIFY command.
2161 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
2162 if (err_mask
&& id
[2] != 0x738c) {
2164 reason
= "SPINUP failed";
2168 * If the drive initially returned incomplete IDENTIFY info,
2169 * we now must reissue the IDENTIFY command.
2171 if (id
[2] == 0x37c8)
2175 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2177 * The exact sequence expected by certain pre-ATA4 drives is:
2179 * IDENTIFY (optional in early ATA)
2180 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2182 * Some drives were very specific about that exact sequence.
2184 * Note that ATA4 says lba is mandatory so the second check
2185 * should never trigger.
2187 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2188 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2191 reason
= "INIT_DEV_PARAMS failed";
2195 /* current CHS translation info (id[53-58]) might be
2196 * changed. reread the identify device info.
2198 flags
&= ~ATA_READID_POSTRESET
;
2208 if (ata_msg_warn(ap
))
2209 ata_dev_printk(dev
, KERN_WARNING
, "failed to IDENTIFY "
2210 "(%s, err_mask=0x%x)\n", reason
, err_mask
);
2214 static int ata_do_link_spd_horkage(struct ata_device
*dev
)
2216 struct ata_link
*plink
= ata_dev_phys_link(dev
);
2217 u32 target
, target_limit
;
2219 if (!sata_scr_valid(plink
))
2222 if (dev
->horkage
& ATA_HORKAGE_1_5_GBPS
)
2227 target_limit
= (1 << target
) - 1;
2229 /* if already on stricter limit, no need to push further */
2230 if (plink
->sata_spd_limit
<= target_limit
)
2233 plink
->sata_spd_limit
= target_limit
;
2235 /* Request another EH round by returning -EAGAIN if link is
2236 * going faster than the target speed. Forward progress is
2237 * guaranteed by setting sata_spd_limit to target_limit above.
2239 if (plink
->sata_spd
> target
) {
2240 ata_dev_printk(dev
, KERN_INFO
,
2241 "applying link speed limit horkage to %s\n",
2242 sata_spd_string(target
));
2248 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2250 struct ata_port
*ap
= dev
->link
->ap
;
2252 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_BRIDGE_OK
)
2255 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2258 static int ata_dev_config_ncq(struct ata_device
*dev
,
2259 char *desc
, size_t desc_sz
)
2261 struct ata_port
*ap
= dev
->link
->ap
;
2262 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2263 unsigned int err_mask
;
2266 if (!ata_id_has_ncq(dev
->id
)) {
2270 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2271 snprintf(desc
, desc_sz
, "NCQ (not used)");
2274 if (ap
->flags
& ATA_FLAG_NCQ
) {
2275 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2276 dev
->flags
|= ATA_DFLAG_NCQ
;
2279 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_FPDMA_AA
) &&
2280 (ap
->flags
& ATA_FLAG_FPDMA_AA
) &&
2281 ata_id_has_fpdma_aa(dev
->id
)) {
2282 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SATA_ENABLE
,
2285 ata_dev_printk(dev
, KERN_ERR
, "failed to enable AA"
2286 "(error_mask=0x%x)\n", err_mask
);
2287 if (err_mask
!= AC_ERR_DEV
) {
2288 dev
->horkage
|= ATA_HORKAGE_BROKEN_FPDMA_AA
;
2295 if (hdepth
>= ddepth
)
2296 snprintf(desc
, desc_sz
, "NCQ (depth %d)%s", ddepth
, aa_desc
);
2298 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)%s", hdepth
,
2304 * ata_dev_configure - Configure the specified ATA/ATAPI device
2305 * @dev: Target device to configure
2307 * Configure @dev according to @dev->id. Generic and low-level
2308 * driver specific fixups are also applied.
2311 * Kernel thread context (may sleep)
2314 * 0 on success, -errno otherwise
2316 int ata_dev_configure(struct ata_device
*dev
)
2318 struct ata_port
*ap
= dev
->link
->ap
;
2319 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2320 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2321 const u16
*id
= dev
->id
;
2322 unsigned long xfer_mask
;
2323 char revbuf
[7]; /* XYZ-99\0 */
2324 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2325 char modelbuf
[ATA_ID_PROD_LEN
+1];
2328 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2329 ata_dev_printk(dev
, KERN_INFO
, "%s: ENTER/EXIT -- nodev\n",
2334 if (ata_msg_probe(ap
))
2335 ata_dev_printk(dev
, KERN_DEBUG
, "%s: ENTER\n", __func__
);
2338 dev
->horkage
|= ata_dev_blacklisted(dev
);
2339 ata_force_horkage(dev
);
2341 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2342 ata_dev_printk(dev
, KERN_INFO
,
2343 "unsupported device, disabling\n");
2344 ata_dev_disable(dev
);
2348 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2349 dev
->class == ATA_DEV_ATAPI
) {
2350 ata_dev_printk(dev
, KERN_WARNING
,
2351 "WARNING: ATAPI is %s, device ignored.\n",
2352 atapi_enabled
? "not supported with this driver"
2354 ata_dev_disable(dev
);
2358 rc
= ata_do_link_spd_horkage(dev
);
2362 /* let ACPI work its magic */
2363 rc
= ata_acpi_on_devcfg(dev
);
2367 /* massage HPA, do it early as it might change IDENTIFY data */
2368 rc
= ata_hpa_resize(dev
);
2372 /* print device capabilities */
2373 if (ata_msg_probe(ap
))
2374 ata_dev_printk(dev
, KERN_DEBUG
,
2375 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2376 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2378 id
[49], id
[82], id
[83], id
[84],
2379 id
[85], id
[86], id
[87], id
[88]);
2381 /* initialize to-be-configured parameters */
2382 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2383 dev
->max_sectors
= 0;
2389 dev
->multi_count
= 0;
2392 * common ATA, ATAPI feature tests
2395 /* find max transfer mode; for printk only */
2396 xfer_mask
= ata_id_xfermask(id
);
2398 if (ata_msg_probe(ap
))
2401 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2402 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2405 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2408 /* ATA-specific feature tests */
2409 if (dev
->class == ATA_DEV_ATA
) {
2410 if (ata_id_is_cfa(id
)) {
2411 /* CPRM may make this media unusable */
2412 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2413 ata_dev_printk(dev
, KERN_WARNING
,
2414 "supports DRM functions and may "
2415 "not be fully accessable.\n");
2416 snprintf(revbuf
, 7, "CFA");
2418 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2419 /* Warn the user if the device has TPM extensions */
2420 if (ata_id_has_tpm(id
))
2421 ata_dev_printk(dev
, KERN_WARNING
,
2422 "supports DRM functions and may "
2423 "not be fully accessable.\n");
2426 dev
->n_sectors
= ata_id_n_sectors(id
);
2428 /* get current R/W Multiple count setting */
2429 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2430 unsigned int max
= dev
->id
[47] & 0xff;
2431 unsigned int cnt
= dev
->id
[59] & 0xff;
2432 /* only recognize/allow powers of two here */
2433 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2435 dev
->multi_count
= cnt
;
2438 if (ata_id_has_lba(id
)) {
2439 const char *lba_desc
;
2443 dev
->flags
|= ATA_DFLAG_LBA
;
2444 if (ata_id_has_lba48(id
)) {
2445 dev
->flags
|= ATA_DFLAG_LBA48
;
2448 if (dev
->n_sectors
>= (1UL << 28) &&
2449 ata_id_has_flush_ext(id
))
2450 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2454 rc
= ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2458 /* print device info to dmesg */
2459 if (ata_msg_drv(ap
) && print_info
) {
2460 ata_dev_printk(dev
, KERN_INFO
,
2461 "%s: %s, %s, max %s\n",
2462 revbuf
, modelbuf
, fwrevbuf
,
2463 ata_mode_string(xfer_mask
));
2464 ata_dev_printk(dev
, KERN_INFO
,
2465 "%Lu sectors, multi %u: %s %s\n",
2466 (unsigned long long)dev
->n_sectors
,
2467 dev
->multi_count
, lba_desc
, ncq_desc
);
2472 /* Default translation */
2473 dev
->cylinders
= id
[1];
2475 dev
->sectors
= id
[6];
2477 if (ata_id_current_chs_valid(id
)) {
2478 /* Current CHS translation is valid. */
2479 dev
->cylinders
= id
[54];
2480 dev
->heads
= id
[55];
2481 dev
->sectors
= id
[56];
2484 /* print device info to dmesg */
2485 if (ata_msg_drv(ap
) && print_info
) {
2486 ata_dev_printk(dev
, KERN_INFO
,
2487 "%s: %s, %s, max %s\n",
2488 revbuf
, modelbuf
, fwrevbuf
,
2489 ata_mode_string(xfer_mask
));
2490 ata_dev_printk(dev
, KERN_INFO
,
2491 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2492 (unsigned long long)dev
->n_sectors
,
2493 dev
->multi_count
, dev
->cylinders
,
2494 dev
->heads
, dev
->sectors
);
2501 /* ATAPI-specific feature tests */
2502 else if (dev
->class == ATA_DEV_ATAPI
) {
2503 const char *cdb_intr_string
= "";
2504 const char *atapi_an_string
= "";
2505 const char *dma_dir_string
= "";
2508 rc
= atapi_cdb_len(id
);
2509 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2510 if (ata_msg_warn(ap
))
2511 ata_dev_printk(dev
, KERN_WARNING
,
2512 "unsupported CDB len\n");
2516 dev
->cdb_len
= (unsigned int) rc
;
2518 /* Enable ATAPI AN if both the host and device have
2519 * the support. If PMP is attached, SNTF is required
2520 * to enable ATAPI AN to discern between PHY status
2521 * changed notifications and ATAPI ANs.
2524 (ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2525 (!sata_pmp_attached(ap
) ||
2526 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2527 unsigned int err_mask
;
2529 /* issue SET feature command to turn this on */
2530 err_mask
= ata_dev_set_feature(dev
,
2531 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2533 ata_dev_printk(dev
, KERN_ERR
,
2534 "failed to enable ATAPI AN "
2535 "(err_mask=0x%x)\n", err_mask
);
2537 dev
->flags
|= ATA_DFLAG_AN
;
2538 atapi_an_string
= ", ATAPI AN";
2542 if (ata_id_cdb_intr(dev
->id
)) {
2543 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2544 cdb_intr_string
= ", CDB intr";
2547 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2548 dev
->flags
|= ATA_DFLAG_DMADIR
;
2549 dma_dir_string
= ", DMADIR";
2552 /* print device info to dmesg */
2553 if (ata_msg_drv(ap
) && print_info
)
2554 ata_dev_printk(dev
, KERN_INFO
,
2555 "ATAPI: %s, %s, max %s%s%s%s\n",
2557 ata_mode_string(xfer_mask
),
2558 cdb_intr_string
, atapi_an_string
,
2562 /* determine max_sectors */
2563 dev
->max_sectors
= ATA_MAX_SECTORS
;
2564 if (dev
->flags
& ATA_DFLAG_LBA48
)
2565 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2567 if (!(dev
->horkage
& ATA_HORKAGE_IPM
)) {
2568 if (ata_id_has_hipm(dev
->id
))
2569 dev
->flags
|= ATA_DFLAG_HIPM
;
2570 if (ata_id_has_dipm(dev
->id
))
2571 dev
->flags
|= ATA_DFLAG_DIPM
;
2574 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2576 if (ata_dev_knobble(dev
)) {
2577 if (ata_msg_drv(ap
) && print_info
)
2578 ata_dev_printk(dev
, KERN_INFO
,
2579 "applying bridge limits\n");
2580 dev
->udma_mask
&= ATA_UDMA5
;
2581 dev
->max_sectors
= ATA_MAX_SECTORS
;
2584 if ((dev
->class == ATA_DEV_ATAPI
) &&
2585 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2586 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2587 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2590 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2591 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2594 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_IPM
) {
2595 dev
->horkage
|= ATA_HORKAGE_IPM
;
2597 /* reset link pm_policy for this port to no pm */
2598 ap
->pm_policy
= MAX_PERFORMANCE
;
2601 if (ap
->ops
->dev_config
)
2602 ap
->ops
->dev_config(dev
);
2604 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2605 /* Let the user know. We don't want to disallow opens for
2606 rescue purposes, or in case the vendor is just a blithering
2607 idiot. Do this after the dev_config call as some controllers
2608 with buggy firmware may want to avoid reporting false device
2612 ata_dev_printk(dev
, KERN_WARNING
,
2613 "Drive reports diagnostics failure. This may indicate a drive\n");
2614 ata_dev_printk(dev
, KERN_WARNING
,
2615 "fault or invalid emulation. Contact drive vendor for information.\n");
2619 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2620 ata_dev_printk(dev
, KERN_WARNING
, "WARNING: device requires "
2621 "firmware update to be fully functional.\n");
2622 ata_dev_printk(dev
, KERN_WARNING
, " contact the vendor "
2623 "or visit http://ata.wiki.kernel.org.\n");
2629 if (ata_msg_probe(ap
))
2630 ata_dev_printk(dev
, KERN_DEBUG
,
2631 "%s: EXIT, err\n", __func__
);
2636 * ata_cable_40wire - return 40 wire cable type
2639 * Helper method for drivers which want to hardwire 40 wire cable
2643 int ata_cable_40wire(struct ata_port
*ap
)
2645 return ATA_CBL_PATA40
;
2649 * ata_cable_80wire - return 80 wire cable type
2652 * Helper method for drivers which want to hardwire 80 wire cable
2656 int ata_cable_80wire(struct ata_port
*ap
)
2658 return ATA_CBL_PATA80
;
2662 * ata_cable_unknown - return unknown PATA cable.
2665 * Helper method for drivers which have no PATA cable detection.
2668 int ata_cable_unknown(struct ata_port
*ap
)
2670 return ATA_CBL_PATA_UNK
;
2674 * ata_cable_ignore - return ignored PATA cable.
2677 * Helper method for drivers which don't use cable type to limit
2680 int ata_cable_ignore(struct ata_port
*ap
)
2682 return ATA_CBL_PATA_IGN
;
2686 * ata_cable_sata - return SATA cable type
2689 * Helper method for drivers which have SATA cables
2692 int ata_cable_sata(struct ata_port
*ap
)
2694 return ATA_CBL_SATA
;
2698 * ata_bus_probe - Reset and probe ATA bus
2701 * Master ATA bus probing function. Initiates a hardware-dependent
2702 * bus reset, then attempts to identify any devices found on
2706 * PCI/etc. bus probe sem.
2709 * Zero on success, negative errno otherwise.
2712 int ata_bus_probe(struct ata_port
*ap
)
2714 unsigned int classes
[ATA_MAX_DEVICES
];
2715 int tries
[ATA_MAX_DEVICES
];
2717 struct ata_device
*dev
;
2719 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2720 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2723 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2724 /* If we issue an SRST then an ATA drive (not ATAPI)
2725 * may change configuration and be in PIO0 timing. If
2726 * we do a hard reset (or are coming from power on)
2727 * this is true for ATA or ATAPI. Until we've set a
2728 * suitable controller mode we should not touch the
2729 * bus as we may be talking too fast.
2731 dev
->pio_mode
= XFER_PIO_0
;
2733 /* If the controller has a pio mode setup function
2734 * then use it to set the chipset to rights. Don't
2735 * touch the DMA setup as that will be dealt with when
2736 * configuring devices.
2738 if (ap
->ops
->set_piomode
)
2739 ap
->ops
->set_piomode(ap
, dev
);
2742 /* reset and determine device classes */
2743 ap
->ops
->phy_reset(ap
);
2745 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2746 if (dev
->class != ATA_DEV_UNKNOWN
)
2747 classes
[dev
->devno
] = dev
->class;
2749 classes
[dev
->devno
] = ATA_DEV_NONE
;
2751 dev
->class = ATA_DEV_UNKNOWN
;
2754 /* read IDENTIFY page and configure devices. We have to do the identify
2755 specific sequence bass-ackwards so that PDIAG- is released by
2758 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2759 if (tries
[dev
->devno
])
2760 dev
->class = classes
[dev
->devno
];
2762 if (!ata_dev_enabled(dev
))
2765 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2771 /* Now ask for the cable type as PDIAG- should have been released */
2772 if (ap
->ops
->cable_detect
)
2773 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2775 /* We may have SATA bridge glue hiding here irrespective of
2776 * the reported cable types and sensed types. When SATA
2777 * drives indicate we have a bridge, we don't know which end
2778 * of the link the bridge is which is a problem.
2780 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2781 if (ata_id_is_sata(dev
->id
))
2782 ap
->cbl
= ATA_CBL_SATA
;
2784 /* After the identify sequence we can now set up the devices. We do
2785 this in the normal order so that the user doesn't get confused */
2787 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2788 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2789 rc
= ata_dev_configure(dev
);
2790 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2795 /* configure transfer mode */
2796 rc
= ata_set_mode(&ap
->link
, &dev
);
2800 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2806 tries
[dev
->devno
]--;
2810 /* eeek, something went very wrong, give up */
2811 tries
[dev
->devno
] = 0;
2815 /* give it just one more chance */
2816 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2818 if (tries
[dev
->devno
] == 1) {
2819 /* This is the last chance, better to slow
2820 * down than lose it.
2822 sata_down_spd_limit(&ap
->link
, 0);
2823 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2827 if (!tries
[dev
->devno
])
2828 ata_dev_disable(dev
);
2834 * sata_print_link_status - Print SATA link status
2835 * @link: SATA link to printk link status about
2837 * This function prints link speed and status of a SATA link.
2842 static void sata_print_link_status(struct ata_link
*link
)
2844 u32 sstatus
, scontrol
, tmp
;
2846 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2848 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2850 if (ata_phys_link_online(link
)) {
2851 tmp
= (sstatus
>> 4) & 0xf;
2852 ata_link_printk(link
, KERN_INFO
,
2853 "SATA link up %s (SStatus %X SControl %X)\n",
2854 sata_spd_string(tmp
), sstatus
, scontrol
);
2856 ata_link_printk(link
, KERN_INFO
,
2857 "SATA link down (SStatus %X SControl %X)\n",
2863 * ata_dev_pair - return other device on cable
2866 * Obtain the other device on the same cable, or if none is
2867 * present NULL is returned
2870 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2872 struct ata_link
*link
= adev
->link
;
2873 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2874 if (!ata_dev_enabled(pair
))
2880 * sata_down_spd_limit - adjust SATA spd limit downward
2881 * @link: Link to adjust SATA spd limit for
2882 * @spd_limit: Additional limit
2884 * Adjust SATA spd limit of @link downward. Note that this
2885 * function only adjusts the limit. The change must be applied
2886 * using sata_set_spd().
2888 * If @spd_limit is non-zero, the speed is limited to equal to or
2889 * lower than @spd_limit if such speed is supported. If
2890 * @spd_limit is slower than any supported speed, only the lowest
2891 * supported speed is allowed.
2894 * Inherited from caller.
2897 * 0 on success, negative errno on failure
2899 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
2901 u32 sstatus
, spd
, mask
;
2904 if (!sata_scr_valid(link
))
2907 /* If SCR can be read, use it to determine the current SPD.
2908 * If not, use cached value in link->sata_spd.
2910 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2911 if (rc
== 0 && ata_sstatus_online(sstatus
))
2912 spd
= (sstatus
>> 4) & 0xf;
2914 spd
= link
->sata_spd
;
2916 mask
= link
->sata_spd_limit
;
2920 /* unconditionally mask off the highest bit */
2921 bit
= fls(mask
) - 1;
2922 mask
&= ~(1 << bit
);
2924 /* Mask off all speeds higher than or equal to the current
2925 * one. Force 1.5Gbps if current SPD is not available.
2928 mask
&= (1 << (spd
- 1)) - 1;
2932 /* were we already at the bottom? */
2937 if (mask
& ((1 << spd_limit
) - 1))
2938 mask
&= (1 << spd_limit
) - 1;
2940 bit
= ffs(mask
) - 1;
2945 link
->sata_spd_limit
= mask
;
2947 ata_link_printk(link
, KERN_WARNING
, "limiting SATA link speed to %s\n",
2948 sata_spd_string(fls(mask
)));
2953 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2955 struct ata_link
*host_link
= &link
->ap
->link
;
2956 u32 limit
, target
, spd
;
2958 limit
= link
->sata_spd_limit
;
2960 /* Don't configure downstream link faster than upstream link.
2961 * It doesn't speed up anything and some PMPs choke on such
2964 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2965 limit
&= (1 << host_link
->sata_spd
) - 1;
2967 if (limit
== UINT_MAX
)
2970 target
= fls(limit
);
2972 spd
= (*scontrol
>> 4) & 0xf;
2973 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2975 return spd
!= target
;
2979 * sata_set_spd_needed - is SATA spd configuration needed
2980 * @link: Link in question
2982 * Test whether the spd limit in SControl matches
2983 * @link->sata_spd_limit. This function is used to determine
2984 * whether hardreset is necessary to apply SATA spd
2988 * Inherited from caller.
2991 * 1 if SATA spd configuration is needed, 0 otherwise.
2993 static int sata_set_spd_needed(struct ata_link
*link
)
2997 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
3000 return __sata_set_spd_needed(link
, &scontrol
);
3004 * sata_set_spd - set SATA spd according to spd limit
3005 * @link: Link to set SATA spd for
3007 * Set SATA spd of @link according to sata_spd_limit.
3010 * Inherited from caller.
3013 * 0 if spd doesn't need to be changed, 1 if spd has been
3014 * changed. Negative errno if SCR registers are inaccessible.
3016 int sata_set_spd(struct ata_link
*link
)
3021 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3024 if (!__sata_set_spd_needed(link
, &scontrol
))
3027 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3034 * This mode timing computation functionality is ported over from
3035 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3038 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3039 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3040 * for UDMA6, which is currently supported only by Maxtor drives.
3042 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3045 static const struct ata_timing ata_timing
[] = {
3046 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3047 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3048 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3049 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3050 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3051 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3052 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3053 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
3055 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3056 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3057 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
3059 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3060 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3061 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3062 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3063 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
3065 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3066 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3067 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3068 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3069 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3070 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3071 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3072 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
3077 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3078 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
3080 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
3082 q
->setup
= EZ(t
->setup
* 1000, T
);
3083 q
->act8b
= EZ(t
->act8b
* 1000, T
);
3084 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
3085 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
3086 q
->active
= EZ(t
->active
* 1000, T
);
3087 q
->recover
= EZ(t
->recover
* 1000, T
);
3088 q
->dmack_hold
= EZ(t
->dmack_hold
* 1000, T
);
3089 q
->cycle
= EZ(t
->cycle
* 1000, T
);
3090 q
->udma
= EZ(t
->udma
* 1000, UT
);
3093 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
3094 struct ata_timing
*m
, unsigned int what
)
3096 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
3097 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
3098 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
3099 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
3100 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
3101 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
3102 if (what
& ATA_TIMING_DMACK_HOLD
) m
->dmack_hold
= max(a
->dmack_hold
, b
->dmack_hold
);
3103 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
3104 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
3107 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
3109 const struct ata_timing
*t
= ata_timing
;
3111 while (xfer_mode
> t
->mode
)
3114 if (xfer_mode
== t
->mode
)
3119 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
3120 struct ata_timing
*t
, int T
, int UT
)
3122 const u16
*id
= adev
->id
;
3123 const struct ata_timing
*s
;
3124 struct ata_timing p
;
3130 if (!(s
= ata_timing_find_mode(speed
)))
3133 memcpy(t
, s
, sizeof(*s
));
3136 * If the drive is an EIDE drive, it can tell us it needs extended
3137 * PIO/MW_DMA cycle timing.
3140 if (id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
3141 memset(&p
, 0, sizeof(p
));
3143 if (speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
3144 if (speed
<= XFER_PIO_2
)
3145 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO
];
3146 else if ((speed
<= XFER_PIO_4
) ||
3147 (speed
== XFER_PIO_5
&& !ata_id_is_cfa(id
)))
3148 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO_IORDY
];
3149 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
)
3150 p
.cycle
= id
[ATA_ID_EIDE_DMA_MIN
];
3152 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
3156 * Convert the timing to bus clock counts.
3159 ata_timing_quantize(t
, t
, T
, UT
);
3162 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3163 * S.M.A.R.T * and some other commands. We have to ensure that the
3164 * DMA cycle timing is slower/equal than the fastest PIO timing.
3167 if (speed
> XFER_PIO_6
) {
3168 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3169 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3173 * Lengthen active & recovery time so that cycle time is correct.
3176 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3177 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3178 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3181 if (t
->active
+ t
->recover
< t
->cycle
) {
3182 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3183 t
->recover
= t
->cycle
- t
->active
;
3186 /* In a few cases quantisation may produce enough errors to
3187 leave t->cycle too low for the sum of active and recovery
3188 if so we must correct this */
3189 if (t
->active
+ t
->recover
> t
->cycle
)
3190 t
->cycle
= t
->active
+ t
->recover
;
3196 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3197 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3198 * @cycle: cycle duration in ns
3200 * Return matching xfer mode for @cycle. The returned mode is of
3201 * the transfer type specified by @xfer_shift. If @cycle is too
3202 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3203 * than the fastest known mode, the fasted mode is returned.
3209 * Matching xfer_mode, 0xff if no match found.
3211 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3213 u8 base_mode
= 0xff, last_mode
= 0xff;
3214 const struct ata_xfer_ent
*ent
;
3215 const struct ata_timing
*t
;
3217 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3218 if (ent
->shift
== xfer_shift
)
3219 base_mode
= ent
->base
;
3221 for (t
= ata_timing_find_mode(base_mode
);
3222 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3223 unsigned short this_cycle
;
3225 switch (xfer_shift
) {
3227 case ATA_SHIFT_MWDMA
:
3228 this_cycle
= t
->cycle
;
3230 case ATA_SHIFT_UDMA
:
3231 this_cycle
= t
->udma
;
3237 if (cycle
> this_cycle
)
3240 last_mode
= t
->mode
;
3247 * ata_down_xfermask_limit - adjust dev xfer masks downward
3248 * @dev: Device to adjust xfer masks
3249 * @sel: ATA_DNXFER_* selector
3251 * Adjust xfer masks of @dev downward. Note that this function
3252 * does not apply the change. Invoking ata_set_mode() afterwards
3253 * will apply the limit.
3256 * Inherited from caller.
3259 * 0 on success, negative errno on failure
3261 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3264 unsigned long orig_mask
, xfer_mask
;
3265 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3268 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3269 sel
&= ~ATA_DNXFER_QUIET
;
3271 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3274 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3277 case ATA_DNXFER_PIO
:
3278 highbit
= fls(pio_mask
) - 1;
3279 pio_mask
&= ~(1 << highbit
);
3282 case ATA_DNXFER_DMA
:
3284 highbit
= fls(udma_mask
) - 1;
3285 udma_mask
&= ~(1 << highbit
);
3288 } else if (mwdma_mask
) {
3289 highbit
= fls(mwdma_mask
) - 1;
3290 mwdma_mask
&= ~(1 << highbit
);
3296 case ATA_DNXFER_40C
:
3297 udma_mask
&= ATA_UDMA_MASK_40C
;
3300 case ATA_DNXFER_FORCE_PIO0
:
3302 case ATA_DNXFER_FORCE_PIO
:
3311 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3313 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3317 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3318 snprintf(buf
, sizeof(buf
), "%s:%s",
3319 ata_mode_string(xfer_mask
),
3320 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3322 snprintf(buf
, sizeof(buf
), "%s",
3323 ata_mode_string(xfer_mask
));
3325 ata_dev_printk(dev
, KERN_WARNING
,
3326 "limiting speed to %s\n", buf
);
3329 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3335 static int ata_dev_set_mode(struct ata_device
*dev
)
3337 struct ata_port
*ap
= dev
->link
->ap
;
3338 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3339 const bool nosetxfer
= dev
->horkage
& ATA_HORKAGE_NOSETXFER
;
3340 const char *dev_err_whine
= "";
3341 int ign_dev_err
= 0;
3342 unsigned int err_mask
= 0;
3345 dev
->flags
&= ~ATA_DFLAG_PIO
;
3346 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3347 dev
->flags
|= ATA_DFLAG_PIO
;
3349 if (nosetxfer
&& ap
->flags
& ATA_FLAG_SATA
&& ata_id_is_sata(dev
->id
))
3350 dev_err_whine
= " (SET_XFERMODE skipped)";
3353 ata_dev_printk(dev
, KERN_WARNING
,
3354 "NOSETXFER but PATA detected - can't "
3355 "skip SETXFER, might malfunction\n");
3356 err_mask
= ata_dev_set_xfermode(dev
);
3359 if (err_mask
& ~AC_ERR_DEV
)
3363 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3364 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3365 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3369 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3370 /* Old CFA may refuse this command, which is just fine */
3371 if (ata_id_is_cfa(dev
->id
))
3373 /* Catch several broken garbage emulations plus some pre
3375 if (ata_id_major_version(dev
->id
) == 0 &&
3376 dev
->pio_mode
<= XFER_PIO_2
)
3378 /* Some very old devices and some bad newer ones fail
3379 any kind of SET_XFERMODE request but support PIO0-2
3380 timings and no IORDY */
3381 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3384 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3385 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3386 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3387 dev
->dma_mode
== XFER_MW_DMA_0
&&
3388 (dev
->id
[63] >> 8) & 1)
3391 /* if the device is actually configured correctly, ignore dev err */
3392 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3395 if (err_mask
& AC_ERR_DEV
) {
3399 dev_err_whine
= " (device error ignored)";
3402 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3403 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3405 ata_dev_printk(dev
, KERN_INFO
, "configured for %s%s\n",
3406 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3412 ata_dev_printk(dev
, KERN_ERR
, "failed to set xfermode "
3413 "(err_mask=0x%x)\n", err_mask
);
3418 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3419 * @link: link on which timings will be programmed
3420 * @r_failed_dev: out parameter for failed device
3422 * Standard implementation of the function used to tune and set
3423 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3424 * ata_dev_set_mode() fails, pointer to the failing device is
3425 * returned in @r_failed_dev.
3428 * PCI/etc. bus probe sem.
3431 * 0 on success, negative errno otherwise
3434 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3436 struct ata_port
*ap
= link
->ap
;
3437 struct ata_device
*dev
;
3438 int rc
= 0, used_dma
= 0, found
= 0;
3440 /* step 1: calculate xfer_mask */
3441 ata_for_each_dev(dev
, link
, ENABLED
) {
3442 unsigned long pio_mask
, dma_mask
;
3443 unsigned int mode_mask
;
3445 mode_mask
= ATA_DMA_MASK_ATA
;
3446 if (dev
->class == ATA_DEV_ATAPI
)
3447 mode_mask
= ATA_DMA_MASK_ATAPI
;
3448 else if (ata_id_is_cfa(dev
->id
))
3449 mode_mask
= ATA_DMA_MASK_CFA
;
3451 ata_dev_xfermask(dev
);
3452 ata_force_xfermask(dev
);
3454 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3455 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3457 if (libata_dma_mask
& mode_mask
)
3458 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
, dev
->udma_mask
);
3462 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3463 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3466 if (ata_dma_enabled(dev
))
3472 /* step 2: always set host PIO timings */
3473 ata_for_each_dev(dev
, link
, ENABLED
) {
3474 if (dev
->pio_mode
== 0xff) {
3475 ata_dev_printk(dev
, KERN_WARNING
, "no PIO support\n");
3480 dev
->xfer_mode
= dev
->pio_mode
;
3481 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3482 if (ap
->ops
->set_piomode
)
3483 ap
->ops
->set_piomode(ap
, dev
);
3486 /* step 3: set host DMA timings */
3487 ata_for_each_dev(dev
, link
, ENABLED
) {
3488 if (!ata_dma_enabled(dev
))
3491 dev
->xfer_mode
= dev
->dma_mode
;
3492 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3493 if (ap
->ops
->set_dmamode
)
3494 ap
->ops
->set_dmamode(ap
, dev
);
3497 /* step 4: update devices' xfer mode */
3498 ata_for_each_dev(dev
, link
, ENABLED
) {
3499 rc
= ata_dev_set_mode(dev
);
3504 /* Record simplex status. If we selected DMA then the other
3505 * host channels are not permitted to do so.
3507 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3508 ap
->host
->simplex_claimed
= ap
;
3512 *r_failed_dev
= dev
;
3517 * ata_wait_ready - wait for link to become ready
3518 * @link: link to be waited on
3519 * @deadline: deadline jiffies for the operation
3520 * @check_ready: callback to check link readiness
3522 * Wait for @link to become ready. @check_ready should return
3523 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3524 * link doesn't seem to be occupied, other errno for other error
3527 * Transient -ENODEV conditions are allowed for
3528 * ATA_TMOUT_FF_WAIT.
3534 * 0 if @linke is ready before @deadline; otherwise, -errno.
3536 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3537 int (*check_ready
)(struct ata_link
*link
))
3539 unsigned long start
= jiffies
;
3540 unsigned long nodev_deadline
;
3543 /* choose which 0xff timeout to use, read comment in libata.h */
3544 if (link
->ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
)
3545 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT_LONG
);
3547 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3549 /* Slave readiness can't be tested separately from master. On
3550 * M/S emulation configuration, this function should be called
3551 * only on the master and it will handle both master and slave.
3553 WARN_ON(link
== link
->ap
->slave_link
);
3555 if (time_after(nodev_deadline
, deadline
))
3556 nodev_deadline
= deadline
;
3559 unsigned long now
= jiffies
;
3562 ready
= tmp
= check_ready(link
);
3567 * -ENODEV could be transient. Ignore -ENODEV if link
3568 * is online. Also, some SATA devices take a long
3569 * time to clear 0xff after reset. Wait for
3570 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3573 * Note that some PATA controllers (pata_ali) explode
3574 * if status register is read more than once when
3575 * there's no device attached.
3577 if (ready
== -ENODEV
) {
3578 if (ata_link_online(link
))
3580 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3581 !ata_link_offline(link
) &&
3582 time_before(now
, nodev_deadline
))
3588 if (time_after(now
, deadline
))
3591 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3592 (deadline
- now
> 3 * HZ
)) {
3593 ata_link_printk(link
, KERN_WARNING
,
3594 "link is slow to respond, please be patient "
3595 "(ready=%d)\n", tmp
);
3604 * ata_wait_after_reset - wait for link to become ready after reset
3605 * @link: link to be waited on
3606 * @deadline: deadline jiffies for the operation
3607 * @check_ready: callback to check link readiness
3609 * Wait for @link to become ready after reset.
3615 * 0 if @linke is ready before @deadline; otherwise, -errno.
3617 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3618 int (*check_ready
)(struct ata_link
*link
))
3620 msleep(ATA_WAIT_AFTER_RESET
);
3622 return ata_wait_ready(link
, deadline
, check_ready
);
3626 * sata_link_debounce - debounce SATA phy status
3627 * @link: ATA link to debounce SATA phy status for
3628 * @params: timing parameters { interval, duratinon, timeout } in msec
3629 * @deadline: deadline jiffies for the operation
3631 * Make sure SStatus of @link reaches stable state, determined by
3632 * holding the same value where DET is not 1 for @duration polled
3633 * every @interval, before @timeout. Timeout constraints the
3634 * beginning of the stable state. Because DET gets stuck at 1 on
3635 * some controllers after hot unplugging, this functions waits
3636 * until timeout then returns 0 if DET is stable at 1.
3638 * @timeout is further limited by @deadline. The sooner of the
3642 * Kernel thread context (may sleep)
3645 * 0 on success, -errno on failure.
3647 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3648 unsigned long deadline
)
3650 unsigned long interval
= params
[0];
3651 unsigned long duration
= params
[1];
3652 unsigned long last_jiffies
, t
;
3656 t
= ata_deadline(jiffies
, params
[2]);
3657 if (time_before(t
, deadline
))
3660 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3665 last_jiffies
= jiffies
;
3669 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3675 if (cur
== 1 && time_before(jiffies
, deadline
))
3677 if (time_after(jiffies
,
3678 ata_deadline(last_jiffies
, duration
)))
3683 /* unstable, start over */
3685 last_jiffies
= jiffies
;
3687 /* Check deadline. If debouncing failed, return
3688 * -EPIPE to tell upper layer to lower link speed.
3690 if (time_after(jiffies
, deadline
))
3696 * sata_link_resume - resume SATA link
3697 * @link: ATA link to resume SATA
3698 * @params: timing parameters { interval, duratinon, timeout } in msec
3699 * @deadline: deadline jiffies for the operation
3701 * Resume SATA phy @link and debounce it.
3704 * Kernel thread context (may sleep)
3707 * 0 on success, -errno on failure.
3709 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3710 unsigned long deadline
)
3712 int tries
= ATA_LINK_RESUME_TRIES
;
3713 u32 scontrol
, serror
;
3716 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3720 * Writes to SControl sometimes get ignored under certain
3721 * controllers (ata_piix SIDPR). Make sure DET actually is
3725 scontrol
= (scontrol
& 0x0f0) | 0x300;
3726 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3729 * Some PHYs react badly if SStatus is pounded
3730 * immediately after resuming. Delay 200ms before
3735 /* is SControl restored correctly? */
3736 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3738 } while ((scontrol
& 0xf0f) != 0x300 && --tries
);
3740 if ((scontrol
& 0xf0f) != 0x300) {
3741 ata_link_printk(link
, KERN_ERR
,
3742 "failed to resume link (SControl %X)\n",
3747 if (tries
< ATA_LINK_RESUME_TRIES
)
3748 ata_link_printk(link
, KERN_WARNING
,
3749 "link resume succeeded after %d retries\n",
3750 ATA_LINK_RESUME_TRIES
- tries
);
3752 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3755 /* clear SError, some PHYs require this even for SRST to work */
3756 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3757 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3759 return rc
!= -EINVAL
? rc
: 0;
3763 * ata_std_prereset - prepare for reset
3764 * @link: ATA link to be reset
3765 * @deadline: deadline jiffies for the operation
3767 * @link is about to be reset. Initialize it. Failure from
3768 * prereset makes libata abort whole reset sequence and give up
3769 * that port, so prereset should be best-effort. It does its
3770 * best to prepare for reset sequence but if things go wrong, it
3771 * should just whine, not fail.
3774 * Kernel thread context (may sleep)
3777 * 0 on success, -errno otherwise.
3779 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3781 struct ata_port
*ap
= link
->ap
;
3782 struct ata_eh_context
*ehc
= &link
->eh_context
;
3783 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3786 /* if we're about to do hardreset, nothing more to do */
3787 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3790 /* if SATA, resume link */
3791 if (ap
->flags
& ATA_FLAG_SATA
) {
3792 rc
= sata_link_resume(link
, timing
, deadline
);
3793 /* whine about phy resume failure but proceed */
3794 if (rc
&& rc
!= -EOPNOTSUPP
)
3795 ata_link_printk(link
, KERN_WARNING
, "failed to resume "
3796 "link for reset (errno=%d)\n", rc
);
3799 /* no point in trying softreset on offline link */
3800 if (ata_phys_link_offline(link
))
3801 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3807 * sata_link_hardreset - reset link via SATA phy reset
3808 * @link: link to reset
3809 * @timing: timing parameters { interval, duratinon, timeout } in msec
3810 * @deadline: deadline jiffies for the operation
3811 * @online: optional out parameter indicating link onlineness
3812 * @check_ready: optional callback to check link readiness
3814 * SATA phy-reset @link using DET bits of SControl register.
3815 * After hardreset, link readiness is waited upon using
3816 * ata_wait_ready() if @check_ready is specified. LLDs are
3817 * allowed to not specify @check_ready and wait itself after this
3818 * function returns. Device classification is LLD's
3821 * *@online is set to one iff reset succeeded and @link is online
3825 * Kernel thread context (may sleep)
3828 * 0 on success, -errno otherwise.
3830 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3831 unsigned long deadline
,
3832 bool *online
, int (*check_ready
)(struct ata_link
*))
3842 if (sata_set_spd_needed(link
)) {
3843 /* SATA spec says nothing about how to reconfigure
3844 * spd. To be on the safe side, turn off phy during
3845 * reconfiguration. This works for at least ICH7 AHCI
3848 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3851 scontrol
= (scontrol
& 0x0f0) | 0x304;
3853 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3859 /* issue phy wake/reset */
3860 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3863 scontrol
= (scontrol
& 0x0f0) | 0x301;
3865 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3868 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3869 * 10.4.2 says at least 1 ms.
3873 /* bring link back */
3874 rc
= sata_link_resume(link
, timing
, deadline
);
3877 /* if link is offline nothing more to do */
3878 if (ata_phys_link_offline(link
))
3881 /* Link is online. From this point, -ENODEV too is an error. */
3885 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3886 /* If PMP is supported, we have to do follow-up SRST.
3887 * Some PMPs don't send D2H Reg FIS after hardreset if
3888 * the first port is empty. Wait only for
3889 * ATA_TMOUT_PMP_SRST_WAIT.
3892 unsigned long pmp_deadline
;
3894 pmp_deadline
= ata_deadline(jiffies
,
3895 ATA_TMOUT_PMP_SRST_WAIT
);
3896 if (time_after(pmp_deadline
, deadline
))
3897 pmp_deadline
= deadline
;
3898 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3906 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3908 if (rc
&& rc
!= -EAGAIN
) {
3909 /* online is set iff link is online && reset succeeded */
3912 ata_link_printk(link
, KERN_ERR
,
3913 "COMRESET failed (errno=%d)\n", rc
);
3915 DPRINTK("EXIT, rc=%d\n", rc
);
3920 * sata_std_hardreset - COMRESET w/o waiting or classification
3921 * @link: link to reset
3922 * @class: resulting class of attached device
3923 * @deadline: deadline jiffies for the operation
3925 * Standard SATA COMRESET w/o waiting or classification.
3928 * Kernel thread context (may sleep)
3931 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3933 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3934 unsigned long deadline
)
3936 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3941 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3942 return online
? -EAGAIN
: rc
;
3946 * ata_std_postreset - standard postreset callback
3947 * @link: the target ata_link
3948 * @classes: classes of attached devices
3950 * This function is invoked after a successful reset. Note that
3951 * the device might have been reset more than once using
3952 * different reset methods before postreset is invoked.
3955 * Kernel thread context (may sleep)
3957 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3963 /* reset complete, clear SError */
3964 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3965 sata_scr_write(link
, SCR_ERROR
, serror
);
3967 /* print link status */
3968 sata_print_link_status(link
);
3974 * ata_dev_same_device - Determine whether new ID matches configured device
3975 * @dev: device to compare against
3976 * @new_class: class of the new device
3977 * @new_id: IDENTIFY page of the new device
3979 * Compare @new_class and @new_id against @dev and determine
3980 * whether @dev is the device indicated by @new_class and
3987 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3989 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3992 const u16
*old_id
= dev
->id
;
3993 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3994 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3996 if (dev
->class != new_class
) {
3997 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %d != %d\n",
3998 dev
->class, new_class
);
4002 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
4003 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
4004 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
4005 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
4007 if (strcmp(model
[0], model
[1])) {
4008 ata_dev_printk(dev
, KERN_INFO
, "model number mismatch "
4009 "'%s' != '%s'\n", model
[0], model
[1]);
4013 if (strcmp(serial
[0], serial
[1])) {
4014 ata_dev_printk(dev
, KERN_INFO
, "serial number mismatch "
4015 "'%s' != '%s'\n", serial
[0], serial
[1]);
4023 * ata_dev_reread_id - Re-read IDENTIFY data
4024 * @dev: target ATA device
4025 * @readid_flags: read ID flags
4027 * Re-read IDENTIFY page and make sure @dev is still attached to
4031 * Kernel thread context (may sleep)
4034 * 0 on success, negative errno otherwise
4036 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
4038 unsigned int class = dev
->class;
4039 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
4043 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
4047 /* is the device still there? */
4048 if (!ata_dev_same_device(dev
, class, id
))
4051 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
4056 * ata_dev_revalidate - Revalidate ATA device
4057 * @dev: device to revalidate
4058 * @new_class: new class code
4059 * @readid_flags: read ID flags
4061 * Re-read IDENTIFY page, make sure @dev is still attached to the
4062 * port and reconfigure it according to the new IDENTIFY page.
4065 * Kernel thread context (may sleep)
4068 * 0 on success, negative errno otherwise
4070 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
4071 unsigned int readid_flags
)
4073 u64 n_sectors
= dev
->n_sectors
;
4074 u64 n_native_sectors
= dev
->n_native_sectors
;
4077 if (!ata_dev_enabled(dev
))
4080 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4081 if (ata_class_enabled(new_class
) &&
4082 new_class
!= ATA_DEV_ATA
&&
4083 new_class
!= ATA_DEV_ATAPI
&&
4084 new_class
!= ATA_DEV_SEMB
) {
4085 ata_dev_printk(dev
, KERN_INFO
, "class mismatch %u != %u\n",
4086 dev
->class, new_class
);
4092 rc
= ata_dev_reread_id(dev
, readid_flags
);
4096 /* configure device according to the new ID */
4097 rc
= ata_dev_configure(dev
);
4101 /* verify n_sectors hasn't changed */
4102 if (dev
->class != ATA_DEV_ATA
|| !n_sectors
||
4103 dev
->n_sectors
== n_sectors
)
4106 /* n_sectors has changed */
4107 ata_dev_printk(dev
, KERN_WARNING
, "n_sectors mismatch %llu != %llu\n",
4108 (unsigned long long)n_sectors
,
4109 (unsigned long long)dev
->n_sectors
);
4112 * Something could have caused HPA to be unlocked
4113 * involuntarily. If n_native_sectors hasn't changed and the
4114 * new size matches it, keep the device.
4116 if (dev
->n_native_sectors
== n_native_sectors
&&
4117 dev
->n_sectors
> n_sectors
&& dev
->n_sectors
== n_native_sectors
) {
4118 ata_dev_printk(dev
, KERN_WARNING
,
4119 "new n_sectors matches native, probably "
4120 "late HPA unlock, n_sectors updated\n");
4121 /* use the larger n_sectors */
4126 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4127 * unlocking HPA in those cases.
4129 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4131 if (dev
->n_native_sectors
== n_native_sectors
&&
4132 dev
->n_sectors
< n_sectors
&& n_sectors
== n_native_sectors
&&
4133 !(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
)) {
4134 ata_dev_printk(dev
, KERN_WARNING
,
4135 "old n_sectors matches native, probably "
4136 "late HPA lock, will try to unlock HPA\n");
4137 /* try unlocking HPA */
4138 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
4143 /* restore original n_[native_]sectors and fail */
4144 dev
->n_native_sectors
= n_native_sectors
;
4145 dev
->n_sectors
= n_sectors
;
4147 ata_dev_printk(dev
, KERN_ERR
, "revalidation failed (errno=%d)\n", rc
);
4151 struct ata_blacklist_entry
{
4152 const char *model_num
;
4153 const char *model_rev
;
4154 unsigned long horkage
;
4157 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4158 /* Devices with DMA related problems under Linux */
4159 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4160 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4161 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4162 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4163 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4164 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4165 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4166 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4167 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4168 { "CRD-848[02]B", NULL
, ATA_HORKAGE_NODMA
},
4169 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4170 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4171 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4172 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4173 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4174 { "HITACHI CDR-8[34]35",NULL
, ATA_HORKAGE_NODMA
},
4175 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4176 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4177 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4178 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4179 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4180 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4181 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4182 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4183 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4184 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4185 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4186 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4187 /* Odd clown on sil3726/4726 PMPs */
4188 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
4190 /* Weird ATAPI devices */
4191 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4192 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
4194 /* Devices we expect to fail diagnostics */
4196 /* Devices where NCQ should be avoided */
4198 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4199 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4200 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4201 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4203 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4204 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4205 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4206 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4207 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
4209 /* Seagate NCQ + FLUSH CACHE firmware bug */
4210 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4211 ATA_HORKAGE_FIRMWARE_WARN
},
4213 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4214 ATA_HORKAGE_FIRMWARE_WARN
},
4216 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4217 ATA_HORKAGE_FIRMWARE_WARN
},
4219 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4220 ATA_HORKAGE_FIRMWARE_WARN
},
4222 /* Blacklist entries taken from Silicon Image 3124/3132
4223 Windows driver .inf file - also several Linux problem reports */
4224 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4225 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4226 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4228 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4229 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ
, },
4231 /* devices which puke on READ_NATIVE_MAX */
4232 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4233 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4234 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4235 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4237 /* this one allows HPA unlocking but fails IOs on the area */
4238 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA
},
4240 /* Devices which report 1 sector over size HPA */
4241 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4242 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4243 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4245 /* Devices which get the IVB wrong */
4246 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4247 /* Maybe we should just blacklist TSSTcorp... */
4248 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB
, },
4250 /* Devices that do not need bridging limits applied */
4251 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4253 /* Devices which aren't very happy with higher link speeds */
4254 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4257 * Devices which choke on SETXFER. Applies only if both the
4258 * device and controller are SATA.
4260 { "PIONEER DVD-RW DVRTD08", "1.00", ATA_HORKAGE_NOSETXFER
},
4267 * glob_match - match a text string against a glob-style pattern
4268 * @text: the string to be examined
4269 * @pattern: the glob-style pattern to be matched against
4271 * Either/both of text and pattern can be empty strings.
4273 * Match text against a glob-style pattern, with wildcards and simple sets:
4275 * ? matches any single character.
4276 * * matches any run of characters.
4277 * [xyz] matches a single character from the set: x, y, or z.
4278 * [a-d] matches a single character from the range: a, b, c, or d.
4279 * [a-d0-9] matches a single character from either range.
4281 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4282 * Behaviour with malformed patterns is undefined, though generally reasonable.
4284 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4286 * This function uses one level of recursion per '*' in pattern.
4287 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4288 * this will not cause stack problems for any reasonable use here.
4291 * 0 on match, 1 otherwise.
4293 static int glob_match (const char *text
, const char *pattern
)
4296 /* Match single character or a '?' wildcard */
4297 if (*text
== *pattern
|| *pattern
== '?') {
4299 return 0; /* End of both strings: match */
4301 /* Match single char against a '[' bracketed ']' pattern set */
4302 if (!*text
|| *pattern
!= '[')
4303 break; /* Not a pattern set */
4304 while (*++pattern
&& *pattern
!= ']' && *text
!= *pattern
) {
4305 if (*pattern
== '-' && *(pattern
- 1) != '[')
4306 if (*text
> *(pattern
- 1) && *text
< *(pattern
+ 1)) {
4311 if (!*pattern
|| *pattern
== ']')
4312 return 1; /* No match */
4313 while (*pattern
&& *pattern
++ != ']');
4315 } while (*++text
&& *pattern
);
4317 /* Match any run of chars against a '*' wildcard */
4318 if (*pattern
== '*') {
4320 return 0; /* Match: avoid recursion at end of pattern */
4321 /* Loop to handle additional pattern chars after the wildcard */
4323 if (glob_match(text
, pattern
) == 0)
4324 return 0; /* Remainder matched */
4325 ++text
; /* Absorb (match) this char and try again */
4328 if (!*text
&& !*pattern
)
4329 return 0; /* End of both strings: match */
4330 return 1; /* No match */
4333 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4335 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4336 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4337 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4339 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4340 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4342 while (ad
->model_num
) {
4343 if (!glob_match(model_num
, ad
->model_num
)) {
4344 if (ad
->model_rev
== NULL
)
4346 if (!glob_match(model_rev
, ad
->model_rev
))
4354 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4356 /* We don't support polling DMA.
4357 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4358 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4360 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4361 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4363 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4367 * ata_is_40wire - check drive side detection
4370 * Perform drive side detection decoding, allowing for device vendors
4371 * who can't follow the documentation.
4374 static int ata_is_40wire(struct ata_device
*dev
)
4376 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4377 return ata_drive_40wire_relaxed(dev
->id
);
4378 return ata_drive_40wire(dev
->id
);
4382 * cable_is_40wire - 40/80/SATA decider
4383 * @ap: port to consider
4385 * This function encapsulates the policy for speed management
4386 * in one place. At the moment we don't cache the result but
4387 * there is a good case for setting ap->cbl to the result when
4388 * we are called with unknown cables (and figuring out if it
4389 * impacts hotplug at all).
4391 * Return 1 if the cable appears to be 40 wire.
4394 static int cable_is_40wire(struct ata_port
*ap
)
4396 struct ata_link
*link
;
4397 struct ata_device
*dev
;
4399 /* If the controller thinks we are 40 wire, we are. */
4400 if (ap
->cbl
== ATA_CBL_PATA40
)
4403 /* If the controller thinks we are 80 wire, we are. */
4404 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4407 /* If the system is known to be 40 wire short cable (eg
4408 * laptop), then we allow 80 wire modes even if the drive
4411 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4414 /* If the controller doesn't know, we scan.
4416 * Note: We look for all 40 wire detects at this point. Any
4417 * 80 wire detect is taken to be 80 wire cable because
4418 * - in many setups only the one drive (slave if present) will
4419 * give a valid detect
4420 * - if you have a non detect capable drive you don't want it
4421 * to colour the choice
4423 ata_for_each_link(link
, ap
, EDGE
) {
4424 ata_for_each_dev(dev
, link
, ENABLED
) {
4425 if (!ata_is_40wire(dev
))
4433 * ata_dev_xfermask - Compute supported xfermask of the given device
4434 * @dev: Device to compute xfermask for
4436 * Compute supported xfermask of @dev and store it in
4437 * dev->*_mask. This function is responsible for applying all
4438 * known limits including host controller limits, device
4444 static void ata_dev_xfermask(struct ata_device
*dev
)
4446 struct ata_link
*link
= dev
->link
;
4447 struct ata_port
*ap
= link
->ap
;
4448 struct ata_host
*host
= ap
->host
;
4449 unsigned long xfer_mask
;
4451 /* controller modes available */
4452 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4453 ap
->mwdma_mask
, ap
->udma_mask
);
4455 /* drive modes available */
4456 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4457 dev
->mwdma_mask
, dev
->udma_mask
);
4458 xfer_mask
&= ata_id_xfermask(dev
->id
);
4461 * CFA Advanced TrueIDE timings are not allowed on a shared
4464 if (ata_dev_pair(dev
)) {
4465 /* No PIO5 or PIO6 */
4466 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4467 /* No MWDMA3 or MWDMA 4 */
4468 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4471 if (ata_dma_blacklisted(dev
)) {
4472 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4473 ata_dev_printk(dev
, KERN_WARNING
,
4474 "device is on DMA blacklist, disabling DMA\n");
4477 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4478 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4479 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4480 ata_dev_printk(dev
, KERN_WARNING
, "simplex DMA is claimed by "
4481 "other device, disabling DMA\n");
4484 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4485 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4487 if (ap
->ops
->mode_filter
)
4488 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4490 /* Apply cable rule here. Don't apply it early because when
4491 * we handle hot plug the cable type can itself change.
4492 * Check this last so that we know if the transfer rate was
4493 * solely limited by the cable.
4494 * Unknown or 80 wire cables reported host side are checked
4495 * drive side as well. Cases where we know a 40wire cable
4496 * is used safely for 80 are not checked here.
4498 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4499 /* UDMA/44 or higher would be available */
4500 if (cable_is_40wire(ap
)) {
4501 ata_dev_printk(dev
, KERN_WARNING
,
4502 "limited to UDMA/33 due to 40-wire cable\n");
4503 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4506 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4507 &dev
->mwdma_mask
, &dev
->udma_mask
);
4511 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4512 * @dev: Device to which command will be sent
4514 * Issue SET FEATURES - XFER MODE command to device @dev
4518 * PCI/etc. bus probe sem.
4521 * 0 on success, AC_ERR_* mask otherwise.
4524 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4526 struct ata_taskfile tf
;
4527 unsigned int err_mask
;
4529 /* set up set-features taskfile */
4530 DPRINTK("set features - xfer mode\n");
4532 /* Some controllers and ATAPI devices show flaky interrupt
4533 * behavior after setting xfer mode. Use polling instead.
4535 ata_tf_init(dev
, &tf
);
4536 tf
.command
= ATA_CMD_SET_FEATURES
;
4537 tf
.feature
= SETFEATURES_XFER
;
4538 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4539 tf
.protocol
= ATA_PROT_NODATA
;
4540 /* If we are using IORDY we must send the mode setting command */
4541 if (ata_pio_need_iordy(dev
))
4542 tf
.nsect
= dev
->xfer_mode
;
4543 /* If the device has IORDY and the controller does not - turn it off */
4544 else if (ata_id_has_iordy(dev
->id
))
4546 else /* In the ancient relic department - skip all of this */
4549 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4551 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4555 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4556 * @dev: Device to which command will be sent
4557 * @enable: Whether to enable or disable the feature
4558 * @feature: The sector count represents the feature to set
4560 * Issue SET FEATURES - SATA FEATURES command to device @dev
4561 * on port @ap with sector count
4564 * PCI/etc. bus probe sem.
4567 * 0 on success, AC_ERR_* mask otherwise.
4569 static unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
,
4572 struct ata_taskfile tf
;
4573 unsigned int err_mask
;
4575 /* set up set-features taskfile */
4576 DPRINTK("set features - SATA features\n");
4578 ata_tf_init(dev
, &tf
);
4579 tf
.command
= ATA_CMD_SET_FEATURES
;
4580 tf
.feature
= enable
;
4581 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4582 tf
.protocol
= ATA_PROT_NODATA
;
4585 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4587 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4592 * ata_dev_init_params - Issue INIT DEV PARAMS command
4593 * @dev: Device to which command will be sent
4594 * @heads: Number of heads (taskfile parameter)
4595 * @sectors: Number of sectors (taskfile parameter)
4598 * Kernel thread context (may sleep)
4601 * 0 on success, AC_ERR_* mask otherwise.
4603 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4604 u16 heads
, u16 sectors
)
4606 struct ata_taskfile tf
;
4607 unsigned int err_mask
;
4609 /* Number of sectors per track 1-255. Number of heads 1-16 */
4610 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4611 return AC_ERR_INVALID
;
4613 /* set up init dev params taskfile */
4614 DPRINTK("init dev params \n");
4616 ata_tf_init(dev
, &tf
);
4617 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4618 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4619 tf
.protocol
= ATA_PROT_NODATA
;
4621 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4623 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4624 /* A clean abort indicates an original or just out of spec drive
4625 and we should continue as we issue the setup based on the
4626 drive reported working geometry */
4627 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4630 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4635 * ata_sg_clean - Unmap DMA memory associated with command
4636 * @qc: Command containing DMA memory to be released
4638 * Unmap all mapped DMA memory associated with this command.
4641 * spin_lock_irqsave(host lock)
4643 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4645 struct ata_port
*ap
= qc
->ap
;
4646 struct scatterlist
*sg
= qc
->sg
;
4647 int dir
= qc
->dma_dir
;
4649 WARN_ON_ONCE(sg
== NULL
);
4651 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4654 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4656 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4661 * atapi_check_dma - Check whether ATAPI DMA can be supported
4662 * @qc: Metadata associated with taskfile to check
4664 * Allow low-level driver to filter ATA PACKET commands, returning
4665 * a status indicating whether or not it is OK to use DMA for the
4666 * supplied PACKET command.
4669 * spin_lock_irqsave(host lock)
4671 * RETURNS: 0 when ATAPI DMA can be used
4674 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4676 struct ata_port
*ap
= qc
->ap
;
4678 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4679 * few ATAPI devices choke on such DMA requests.
4681 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4682 unlikely(qc
->nbytes
& 15))
4685 if (ap
->ops
->check_atapi_dma
)
4686 return ap
->ops
->check_atapi_dma(qc
);
4692 * ata_std_qc_defer - Check whether a qc needs to be deferred
4693 * @qc: ATA command in question
4695 * Non-NCQ commands cannot run with any other command, NCQ or
4696 * not. As upper layer only knows the queue depth, we are
4697 * responsible for maintaining exclusion. This function checks
4698 * whether a new command @qc can be issued.
4701 * spin_lock_irqsave(host lock)
4704 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4706 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4708 struct ata_link
*link
= qc
->dev
->link
;
4710 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4711 if (!ata_tag_valid(link
->active_tag
))
4714 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4718 return ATA_DEFER_LINK
;
4721 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4724 * ata_sg_init - Associate command with scatter-gather table.
4725 * @qc: Command to be associated
4726 * @sg: Scatter-gather table.
4727 * @n_elem: Number of elements in s/g table.
4729 * Initialize the data-related elements of queued_cmd @qc
4730 * to point to a scatter-gather table @sg, containing @n_elem
4734 * spin_lock_irqsave(host lock)
4736 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4737 unsigned int n_elem
)
4740 qc
->n_elem
= n_elem
;
4745 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4746 * @qc: Command with scatter-gather table to be mapped.
4748 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4751 * spin_lock_irqsave(host lock)
4754 * Zero on success, negative on error.
4757 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4759 struct ata_port
*ap
= qc
->ap
;
4760 unsigned int n_elem
;
4762 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4764 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4768 DPRINTK("%d sg elements mapped\n", n_elem
);
4769 qc
->orig_n_elem
= qc
->n_elem
;
4770 qc
->n_elem
= n_elem
;
4771 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4777 * swap_buf_le16 - swap halves of 16-bit words in place
4778 * @buf: Buffer to swap
4779 * @buf_words: Number of 16-bit words in buffer.
4781 * Swap halves of 16-bit words if needed to convert from
4782 * little-endian byte order to native cpu byte order, or
4786 * Inherited from caller.
4788 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4793 for (i
= 0; i
< buf_words
; i
++)
4794 buf
[i
] = le16_to_cpu(buf
[i
]);
4795 #endif /* __BIG_ENDIAN */
4799 * ata_qc_new - Request an available ATA command, for queueing
4806 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4808 struct ata_queued_cmd
*qc
= NULL
;
4811 /* no command while frozen */
4812 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4815 /* the last tag is reserved for internal command. */
4816 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4817 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4818 qc
= __ata_qc_from_tag(ap
, i
);
4829 * ata_qc_new_init - Request an available ATA command, and initialize it
4830 * @dev: Device from whom we request an available command structure
4836 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4838 struct ata_port
*ap
= dev
->link
->ap
;
4839 struct ata_queued_cmd
*qc
;
4841 qc
= ata_qc_new(ap
);
4854 * ata_qc_free - free unused ata_queued_cmd
4855 * @qc: Command to complete
4857 * Designed to free unused ata_queued_cmd object
4858 * in case something prevents using it.
4861 * spin_lock_irqsave(host lock)
4863 void ata_qc_free(struct ata_queued_cmd
*qc
)
4865 struct ata_port
*ap
;
4868 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4873 if (likely(ata_tag_valid(tag
))) {
4874 qc
->tag
= ATA_TAG_POISON
;
4875 clear_bit(tag
, &ap
->qc_allocated
);
4879 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4881 struct ata_port
*ap
;
4882 struct ata_link
*link
;
4884 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4885 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4887 link
= qc
->dev
->link
;
4889 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4892 /* command should be marked inactive atomically with qc completion */
4893 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4894 link
->sactive
&= ~(1 << qc
->tag
);
4896 ap
->nr_active_links
--;
4898 link
->active_tag
= ATA_TAG_POISON
;
4899 ap
->nr_active_links
--;
4902 /* clear exclusive status */
4903 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4904 ap
->excl_link
== link
))
4905 ap
->excl_link
= NULL
;
4907 /* atapi: mark qc as inactive to prevent the interrupt handler
4908 * from completing the command twice later, before the error handler
4909 * is called. (when rc != 0 and atapi request sense is needed)
4911 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4912 ap
->qc_active
&= ~(1 << qc
->tag
);
4914 /* call completion callback */
4915 qc
->complete_fn(qc
);
4918 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4920 struct ata_port
*ap
= qc
->ap
;
4922 qc
->result_tf
.flags
= qc
->tf
.flags
;
4923 ap
->ops
->qc_fill_rtf(qc
);
4926 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4928 struct ata_device
*dev
= qc
->dev
;
4930 if (ata_tag_internal(qc
->tag
))
4933 if (ata_is_nodata(qc
->tf
.protocol
))
4936 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4939 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4943 * ata_qc_complete - Complete an active ATA command
4944 * @qc: Command to complete
4946 * Indicate to the mid and upper layers that an ATA
4947 * command has completed, with either an ok or not-ok status.
4950 * spin_lock_irqsave(host lock)
4952 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4954 struct ata_port
*ap
= qc
->ap
;
4956 /* XXX: New EH and old EH use different mechanisms to
4957 * synchronize EH with regular execution path.
4959 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4960 * Normal execution path is responsible for not accessing a
4961 * failed qc. libata core enforces the rule by returning NULL
4962 * from ata_qc_from_tag() for failed qcs.
4964 * Old EH depends on ata_qc_complete() nullifying completion
4965 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4966 * not synchronize with interrupt handler. Only PIO task is
4969 if (ap
->ops
->error_handler
) {
4970 struct ata_device
*dev
= qc
->dev
;
4971 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4973 if (unlikely(qc
->err_mask
))
4974 qc
->flags
|= ATA_QCFLAG_FAILED
;
4976 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4977 /* always fill result TF for failed qc */
4980 if (!ata_tag_internal(qc
->tag
))
4981 ata_qc_schedule_eh(qc
);
4983 __ata_qc_complete(qc
);
4987 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4989 /* read result TF if requested */
4990 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4993 /* Some commands need post-processing after successful
4996 switch (qc
->tf
.command
) {
4997 case ATA_CMD_SET_FEATURES
:
4998 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4999 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
5002 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
5003 case ATA_CMD_SET_MULTI
: /* multi_count changed */
5004 /* revalidate device */
5005 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
5006 ata_port_schedule_eh(ap
);
5010 dev
->flags
|= ATA_DFLAG_SLEEPING
;
5014 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
5015 ata_verify_xfer(qc
);
5017 __ata_qc_complete(qc
);
5019 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
5022 /* read result TF if failed or requested */
5023 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
5026 __ata_qc_complete(qc
);
5031 * ata_qc_complete_multiple - Complete multiple qcs successfully
5032 * @ap: port in question
5033 * @qc_active: new qc_active mask
5035 * Complete in-flight commands. This functions is meant to be
5036 * called from low-level driver's interrupt routine to complete
5037 * requests normally. ap->qc_active and @qc_active is compared
5038 * and commands are completed accordingly.
5041 * spin_lock_irqsave(host lock)
5044 * Number of completed commands on success, -errno otherwise.
5046 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
5051 done_mask
= ap
->qc_active
^ qc_active
;
5053 if (unlikely(done_mask
& qc_active
)) {
5054 ata_port_printk(ap
, KERN_ERR
, "illegal qc_active transition "
5055 "(%08x->%08x)\n", ap
->qc_active
, qc_active
);
5060 struct ata_queued_cmd
*qc
;
5061 unsigned int tag
= __ffs(done_mask
);
5063 qc
= ata_qc_from_tag(ap
, tag
);
5065 ata_qc_complete(qc
);
5068 done_mask
&= ~(1 << tag
);
5075 * ata_qc_issue - issue taskfile to device
5076 * @qc: command to issue to device
5078 * Prepare an ATA command to submission to device.
5079 * This includes mapping the data into a DMA-able
5080 * area, filling in the S/G table, and finally
5081 * writing the taskfile to hardware, starting the command.
5084 * spin_lock_irqsave(host lock)
5086 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5088 struct ata_port
*ap
= qc
->ap
;
5089 struct ata_link
*link
= qc
->dev
->link
;
5090 u8 prot
= qc
->tf
.protocol
;
5092 /* Make sure only one non-NCQ command is outstanding. The
5093 * check is skipped for old EH because it reuses active qc to
5094 * request ATAPI sense.
5096 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5098 if (ata_is_ncq(prot
)) {
5099 WARN_ON_ONCE(link
->sactive
& (1 << qc
->tag
));
5102 ap
->nr_active_links
++;
5103 link
->sactive
|= 1 << qc
->tag
;
5105 WARN_ON_ONCE(link
->sactive
);
5107 ap
->nr_active_links
++;
5108 link
->active_tag
= qc
->tag
;
5111 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5112 ap
->qc_active
|= 1 << qc
->tag
;
5115 * We guarantee to LLDs that they will have at least one
5116 * non-zero sg if the command is a data command.
5118 if (WARN_ON_ONCE(ata_is_data(prot
) &&
5119 (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
)))
5122 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5123 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
5124 if (ata_sg_setup(qc
))
5127 /* if device is sleeping, schedule reset and abort the link */
5128 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5129 link
->eh_info
.action
|= ATA_EH_RESET
;
5130 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5131 ata_link_abort(link
);
5135 ap
->ops
->qc_prep(qc
);
5137 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5138 if (unlikely(qc
->err_mask
))
5143 qc
->err_mask
|= AC_ERR_SYSTEM
;
5145 ata_qc_complete(qc
);
5149 * sata_scr_valid - test whether SCRs are accessible
5150 * @link: ATA link to test SCR accessibility for
5152 * Test whether SCRs are accessible for @link.
5158 * 1 if SCRs are accessible, 0 otherwise.
5160 int sata_scr_valid(struct ata_link
*link
)
5162 struct ata_port
*ap
= link
->ap
;
5164 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5168 * sata_scr_read - read SCR register of the specified port
5169 * @link: ATA link to read SCR for
5171 * @val: Place to store read value
5173 * Read SCR register @reg of @link into *@val. This function is
5174 * guaranteed to succeed if @link is ap->link, the cable type of
5175 * the port is SATA and the port implements ->scr_read.
5178 * None if @link is ap->link. Kernel thread context otherwise.
5181 * 0 on success, negative errno on failure.
5183 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5185 if (ata_is_host_link(link
)) {
5186 if (sata_scr_valid(link
))
5187 return link
->ap
->ops
->scr_read(link
, reg
, val
);
5191 return sata_pmp_scr_read(link
, reg
, val
);
5195 * sata_scr_write - write SCR register of the specified port
5196 * @link: ATA link to write SCR for
5197 * @reg: SCR to write
5198 * @val: value to write
5200 * Write @val to SCR register @reg of @link. This function is
5201 * guaranteed to succeed if @link is ap->link, the cable type of
5202 * the port is SATA and the port implements ->scr_read.
5205 * None if @link is ap->link. Kernel thread context otherwise.
5208 * 0 on success, negative errno on failure.
5210 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5212 if (ata_is_host_link(link
)) {
5213 if (sata_scr_valid(link
))
5214 return link
->ap
->ops
->scr_write(link
, reg
, val
);
5218 return sata_pmp_scr_write(link
, reg
, val
);
5222 * sata_scr_write_flush - write SCR register of the specified port and flush
5223 * @link: ATA link to write SCR for
5224 * @reg: SCR to write
5225 * @val: value to write
5227 * This function is identical to sata_scr_write() except that this
5228 * function performs flush after writing to the register.
5231 * None if @link is ap->link. Kernel thread context otherwise.
5234 * 0 on success, negative errno on failure.
5236 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5238 if (ata_is_host_link(link
)) {
5241 if (sata_scr_valid(link
)) {
5242 rc
= link
->ap
->ops
->scr_write(link
, reg
, val
);
5244 rc
= link
->ap
->ops
->scr_read(link
, reg
, &val
);
5250 return sata_pmp_scr_write(link
, reg
, val
);
5254 * ata_phys_link_online - test whether the given link is online
5255 * @link: ATA link to test
5257 * Test whether @link is online. Note that this function returns
5258 * 0 if online status of @link cannot be obtained, so
5259 * ata_link_online(link) != !ata_link_offline(link).
5265 * True if the port online status is available and online.
5267 bool ata_phys_link_online(struct ata_link
*link
)
5271 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5272 ata_sstatus_online(sstatus
))
5278 * ata_phys_link_offline - test whether the given link is offline
5279 * @link: ATA link to test
5281 * Test whether @link is offline. Note that this function
5282 * returns 0 if offline status of @link cannot be obtained, so
5283 * ata_link_online(link) != !ata_link_offline(link).
5289 * True if the port offline status is available and offline.
5291 bool ata_phys_link_offline(struct ata_link
*link
)
5295 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5296 !ata_sstatus_online(sstatus
))
5302 * ata_link_online - test whether the given link is online
5303 * @link: ATA link to test
5305 * Test whether @link is online. This is identical to
5306 * ata_phys_link_online() when there's no slave link. When
5307 * there's a slave link, this function should only be called on
5308 * the master link and will return true if any of M/S links is
5315 * True if the port online status is available and online.
5317 bool ata_link_online(struct ata_link
*link
)
5319 struct ata_link
*slave
= link
->ap
->slave_link
;
5321 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5323 return ata_phys_link_online(link
) ||
5324 (slave
&& ata_phys_link_online(slave
));
5328 * ata_link_offline - test whether the given link is offline
5329 * @link: ATA link to test
5331 * Test whether @link is offline. This is identical to
5332 * ata_phys_link_offline() when there's no slave link. When
5333 * there's a slave link, this function should only be called on
5334 * the master link and will return true if both M/S links are
5341 * True if the port offline status is available and offline.
5343 bool ata_link_offline(struct ata_link
*link
)
5345 struct ata_link
*slave
= link
->ap
->slave_link
;
5347 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5349 return ata_phys_link_offline(link
) &&
5350 (!slave
|| ata_phys_link_offline(slave
));
5354 static int ata_host_request_pm(struct ata_host
*host
, pm_message_t mesg
,
5355 unsigned int action
, unsigned int ehi_flags
,
5358 unsigned long flags
;
5361 for (i
= 0; i
< host
->n_ports
; i
++) {
5362 struct ata_port
*ap
= host
->ports
[i
];
5363 struct ata_link
*link
;
5365 /* Previous resume operation might still be in
5366 * progress. Wait for PM_PENDING to clear.
5368 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5369 ata_port_wait_eh(ap
);
5370 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5373 /* request PM ops to EH */
5374 spin_lock_irqsave(ap
->lock
, flags
);
5379 ap
->pm_result
= &rc
;
5382 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5383 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5384 link
->eh_info
.action
|= action
;
5385 link
->eh_info
.flags
|= ehi_flags
;
5388 ata_port_schedule_eh(ap
);
5390 spin_unlock_irqrestore(ap
->lock
, flags
);
5392 /* wait and check result */
5394 ata_port_wait_eh(ap
);
5395 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5405 * ata_host_suspend - suspend host
5406 * @host: host to suspend
5409 * Suspend @host. Actual operation is performed by EH. This
5410 * function requests EH to perform PM operations and waits for EH
5414 * Kernel thread context (may sleep).
5417 * 0 on success, -errno on failure.
5419 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5421 unsigned int ehi_flags
= ATA_EHI_QUIET
;
5425 * disable link pm on all ports before requesting
5428 ata_lpm_enable(host
);
5431 * On some hardware, device fails to respond after spun down
5432 * for suspend. As the device won't be used before being
5433 * resumed, we don't need to touch the device. Ask EH to skip
5434 * the usual stuff and proceed directly to suspend.
5436 * http://thread.gmane.org/gmane.linux.ide/46764
5438 if (mesg
.event
== PM_EVENT_SUSPEND
)
5439 ehi_flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_NO_RECOVERY
;
5441 rc
= ata_host_request_pm(host
, mesg
, 0, ehi_flags
, 1);
5443 host
->dev
->power
.power_state
= mesg
;
5448 * ata_host_resume - resume host
5449 * @host: host to resume
5451 * Resume @host. Actual operation is performed by EH. This
5452 * function requests EH to perform PM operations and returns.
5453 * Note that all resume operations are performed parallely.
5456 * Kernel thread context (may sleep).
5458 void ata_host_resume(struct ata_host
*host
)
5460 ata_host_request_pm(host
, PMSG_ON
, ATA_EH_RESET
,
5461 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 0);
5462 host
->dev
->power
.power_state
= PMSG_ON
;
5464 /* reenable link pm */
5465 ata_lpm_disable(host
);
5470 * ata_dev_init - Initialize an ata_device structure
5471 * @dev: Device structure to initialize
5473 * Initialize @dev in preparation for probing.
5476 * Inherited from caller.
5478 void ata_dev_init(struct ata_device
*dev
)
5480 struct ata_link
*link
= ata_dev_phys_link(dev
);
5481 struct ata_port
*ap
= link
->ap
;
5482 unsigned long flags
;
5484 /* SATA spd limit is bound to the attached device, reset together */
5485 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5488 /* High bits of dev->flags are used to record warm plug
5489 * requests which occur asynchronously. Synchronize using
5492 spin_lock_irqsave(ap
->lock
, flags
);
5493 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5495 spin_unlock_irqrestore(ap
->lock
, flags
);
5497 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5498 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5499 dev
->pio_mask
= UINT_MAX
;
5500 dev
->mwdma_mask
= UINT_MAX
;
5501 dev
->udma_mask
= UINT_MAX
;
5505 * ata_link_init - Initialize an ata_link structure
5506 * @ap: ATA port link is attached to
5507 * @link: Link structure to initialize
5508 * @pmp: Port multiplier port number
5513 * Kernel thread context (may sleep)
5515 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5519 /* clear everything except for devices */
5520 memset(link
, 0, offsetof(struct ata_link
, device
[0]));
5524 link
->active_tag
= ATA_TAG_POISON
;
5525 link
->hw_sata_spd_limit
= UINT_MAX
;
5527 /* can't use iterator, ap isn't initialized yet */
5528 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5529 struct ata_device
*dev
= &link
->device
[i
];
5532 dev
->devno
= dev
- link
->device
;
5533 #ifdef CONFIG_ATA_ACPI
5534 dev
->gtf_filter
= ata_acpi_gtf_filter
;
5541 * sata_link_init_spd - Initialize link->sata_spd_limit
5542 * @link: Link to configure sata_spd_limit for
5544 * Initialize @link->[hw_]sata_spd_limit to the currently
5548 * Kernel thread context (may sleep).
5551 * 0 on success, -errno on failure.
5553 int sata_link_init_spd(struct ata_link
*link
)
5558 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5562 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5564 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5566 ata_force_link_limits(link
);
5568 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5574 * ata_port_alloc - allocate and initialize basic ATA port resources
5575 * @host: ATA host this allocated port belongs to
5577 * Allocate and initialize basic ATA port resources.
5580 * Allocate ATA port on success, NULL on failure.
5583 * Inherited from calling layer (may sleep).
5585 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5587 struct ata_port
*ap
;
5591 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5595 ap
->pflags
|= ATA_PFLAG_INITIALIZING
;
5596 ap
->lock
= &host
->lock
;
5599 ap
->dev
= host
->dev
;
5601 #if defined(ATA_VERBOSE_DEBUG)
5602 /* turn on all debugging levels */
5603 ap
->msg_enable
= 0x00FF;
5604 #elif defined(ATA_DEBUG)
5605 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5607 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5610 mutex_init(&ap
->scsi_scan_mutex
);
5611 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5612 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5613 INIT_LIST_HEAD(&ap
->eh_done_q
);
5614 init_waitqueue_head(&ap
->eh_wait_q
);
5615 init_completion(&ap
->park_req_pending
);
5616 init_timer_deferrable(&ap
->fastdrain_timer
);
5617 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5618 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5620 ap
->cbl
= ATA_CBL_NONE
;
5622 ata_link_init(ap
, &ap
->link
, 0);
5625 ap
->stats
.unhandled_irq
= 1;
5626 ap
->stats
.idle_irq
= 1;
5628 ata_sff_port_init(ap
);
5633 static void ata_host_release(struct device
*gendev
, void *res
)
5635 struct ata_host
*host
= dev_get_drvdata(gendev
);
5638 for (i
= 0; i
< host
->n_ports
; i
++) {
5639 struct ata_port
*ap
= host
->ports
[i
];
5645 scsi_host_put(ap
->scsi_host
);
5647 kfree(ap
->pmp_link
);
5648 kfree(ap
->slave_link
);
5650 host
->ports
[i
] = NULL
;
5653 dev_set_drvdata(gendev
, NULL
);
5657 * ata_host_alloc - allocate and init basic ATA host resources
5658 * @dev: generic device this host is associated with
5659 * @max_ports: maximum number of ATA ports associated with this host
5661 * Allocate and initialize basic ATA host resources. LLD calls
5662 * this function to allocate a host, initializes it fully and
5663 * attaches it using ata_host_register().
5665 * @max_ports ports are allocated and host->n_ports is
5666 * initialized to @max_ports. The caller is allowed to decrease
5667 * host->n_ports before calling ata_host_register(). The unused
5668 * ports will be automatically freed on registration.
5671 * Allocate ATA host on success, NULL on failure.
5674 * Inherited from calling layer (may sleep).
5676 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5678 struct ata_host
*host
;
5684 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5687 /* alloc a container for our list of ATA ports (buses) */
5688 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5689 /* alloc a container for our list of ATA ports (buses) */
5690 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5694 devres_add(dev
, host
);
5695 dev_set_drvdata(dev
, host
);
5697 spin_lock_init(&host
->lock
);
5699 host
->n_ports
= max_ports
;
5701 /* allocate ports bound to this host */
5702 for (i
= 0; i
< max_ports
; i
++) {
5703 struct ata_port
*ap
;
5705 ap
= ata_port_alloc(host
);
5710 host
->ports
[i
] = ap
;
5713 devres_remove_group(dev
, NULL
);
5717 devres_release_group(dev
, NULL
);
5722 * ata_host_alloc_pinfo - alloc host and init with port_info array
5723 * @dev: generic device this host is associated with
5724 * @ppi: array of ATA port_info to initialize host with
5725 * @n_ports: number of ATA ports attached to this host
5727 * Allocate ATA host and initialize with info from @ppi. If NULL
5728 * terminated, @ppi may contain fewer entries than @n_ports. The
5729 * last entry will be used for the remaining ports.
5732 * Allocate ATA host on success, NULL on failure.
5735 * Inherited from calling layer (may sleep).
5737 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5738 const struct ata_port_info
* const * ppi
,
5741 const struct ata_port_info
*pi
;
5742 struct ata_host
*host
;
5745 host
= ata_host_alloc(dev
, n_ports
);
5749 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5750 struct ata_port
*ap
= host
->ports
[i
];
5755 ap
->pio_mask
= pi
->pio_mask
;
5756 ap
->mwdma_mask
= pi
->mwdma_mask
;
5757 ap
->udma_mask
= pi
->udma_mask
;
5758 ap
->flags
|= pi
->flags
;
5759 ap
->link
.flags
|= pi
->link_flags
;
5760 ap
->ops
= pi
->port_ops
;
5762 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5763 host
->ops
= pi
->port_ops
;
5770 * ata_slave_link_init - initialize slave link
5771 * @ap: port to initialize slave link for
5773 * Create and initialize slave link for @ap. This enables slave
5774 * link handling on the port.
5776 * In libata, a port contains links and a link contains devices.
5777 * There is single host link but if a PMP is attached to it,
5778 * there can be multiple fan-out links. On SATA, there's usually
5779 * a single device connected to a link but PATA and SATA
5780 * controllers emulating TF based interface can have two - master
5783 * However, there are a few controllers which don't fit into this
5784 * abstraction too well - SATA controllers which emulate TF
5785 * interface with both master and slave devices but also have
5786 * separate SCR register sets for each device. These controllers
5787 * need separate links for physical link handling
5788 * (e.g. onlineness, link speed) but should be treated like a
5789 * traditional M/S controller for everything else (e.g. command
5790 * issue, softreset).
5792 * slave_link is libata's way of handling this class of
5793 * controllers without impacting core layer too much. For
5794 * anything other than physical link handling, the default host
5795 * link is used for both master and slave. For physical link
5796 * handling, separate @ap->slave_link is used. All dirty details
5797 * are implemented inside libata core layer. From LLD's POV, the
5798 * only difference is that prereset, hardreset and postreset are
5799 * called once more for the slave link, so the reset sequence
5800 * looks like the following.
5802 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5803 * softreset(M) -> postreset(M) -> postreset(S)
5805 * Note that softreset is called only for the master. Softreset
5806 * resets both M/S by definition, so SRST on master should handle
5807 * both (the standard method will work just fine).
5810 * Should be called before host is registered.
5813 * 0 on success, -errno on failure.
5815 int ata_slave_link_init(struct ata_port
*ap
)
5817 struct ata_link
*link
;
5819 WARN_ON(ap
->slave_link
);
5820 WARN_ON(ap
->flags
& ATA_FLAG_PMP
);
5822 link
= kzalloc(sizeof(*link
), GFP_KERNEL
);
5826 ata_link_init(ap
, link
, 1);
5827 ap
->slave_link
= link
;
5831 static void ata_host_stop(struct device
*gendev
, void *res
)
5833 struct ata_host
*host
= dev_get_drvdata(gendev
);
5836 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5838 for (i
= 0; i
< host
->n_ports
; i
++) {
5839 struct ata_port
*ap
= host
->ports
[i
];
5841 if (ap
->ops
->port_stop
)
5842 ap
->ops
->port_stop(ap
);
5845 if (host
->ops
->host_stop
)
5846 host
->ops
->host_stop(host
);
5850 * ata_finalize_port_ops - finalize ata_port_operations
5851 * @ops: ata_port_operations to finalize
5853 * An ata_port_operations can inherit from another ops and that
5854 * ops can again inherit from another. This can go on as many
5855 * times as necessary as long as there is no loop in the
5856 * inheritance chain.
5858 * Ops tables are finalized when the host is started. NULL or
5859 * unspecified entries are inherited from the closet ancestor
5860 * which has the method and the entry is populated with it.
5861 * After finalization, the ops table directly points to all the
5862 * methods and ->inherits is no longer necessary and cleared.
5864 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5869 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5871 static DEFINE_SPINLOCK(lock
);
5872 const struct ata_port_operations
*cur
;
5873 void **begin
= (void **)ops
;
5874 void **end
= (void **)&ops
->inherits
;
5877 if (!ops
|| !ops
->inherits
)
5882 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5883 void **inherit
= (void **)cur
;
5885 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5890 for (pp
= begin
; pp
< end
; pp
++)
5894 ops
->inherits
= NULL
;
5900 * ata_host_start - start and freeze ports of an ATA host
5901 * @host: ATA host to start ports for
5903 * Start and then freeze ports of @host. Started status is
5904 * recorded in host->flags, so this function can be called
5905 * multiple times. Ports are guaranteed to get started only
5906 * once. If host->ops isn't initialized yet, its set to the
5907 * first non-dummy port ops.
5910 * Inherited from calling layer (may sleep).
5913 * 0 if all ports are started successfully, -errno otherwise.
5915 int ata_host_start(struct ata_host
*host
)
5918 void *start_dr
= NULL
;
5921 if (host
->flags
& ATA_HOST_STARTED
)
5924 ata_finalize_port_ops(host
->ops
);
5926 for (i
= 0; i
< host
->n_ports
; i
++) {
5927 struct ata_port
*ap
= host
->ports
[i
];
5929 ata_finalize_port_ops(ap
->ops
);
5931 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5932 host
->ops
= ap
->ops
;
5934 if (ap
->ops
->port_stop
)
5938 if (host
->ops
->host_stop
)
5942 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5947 for (i
= 0; i
< host
->n_ports
; i
++) {
5948 struct ata_port
*ap
= host
->ports
[i
];
5950 if (ap
->ops
->port_start
) {
5951 rc
= ap
->ops
->port_start(ap
);
5954 dev_printk(KERN_ERR
, host
->dev
,
5955 "failed to start port %d "
5956 "(errno=%d)\n", i
, rc
);
5960 ata_eh_freeze_port(ap
);
5964 devres_add(host
->dev
, start_dr
);
5965 host
->flags
|= ATA_HOST_STARTED
;
5970 struct ata_port
*ap
= host
->ports
[i
];
5972 if (ap
->ops
->port_stop
)
5973 ap
->ops
->port_stop(ap
);
5975 devres_free(start_dr
);
5980 * ata_sas_host_init - Initialize a host struct
5981 * @host: host to initialize
5982 * @dev: device host is attached to
5983 * @flags: host flags
5987 * PCI/etc. bus probe sem.
5990 /* KILLME - the only user left is ipr */
5991 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5992 unsigned long flags
, struct ata_port_operations
*ops
)
5994 spin_lock_init(&host
->lock
);
5996 host
->flags
= flags
;
6001 static void async_port_probe(void *data
, async_cookie_t cookie
)
6004 struct ata_port
*ap
= data
;
6007 * If we're not allowed to scan this host in parallel,
6008 * we need to wait until all previous scans have completed
6009 * before going further.
6010 * Jeff Garzik says this is only within a controller, so we
6011 * don't need to wait for port 0, only for later ports.
6013 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
6014 async_synchronize_cookie(cookie
);
6017 if (ap
->ops
->error_handler
) {
6018 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6019 unsigned long flags
;
6021 /* kick EH for boot probing */
6022 spin_lock_irqsave(ap
->lock
, flags
);
6024 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
6025 ehi
->action
|= ATA_EH_RESET
| ATA_EH_LPM
;
6026 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6028 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6029 ap
->pflags
|= ATA_PFLAG_LOADING
;
6030 ata_port_schedule_eh(ap
);
6032 spin_unlock_irqrestore(ap
->lock
, flags
);
6034 /* wait for EH to finish */
6035 ata_port_wait_eh(ap
);
6037 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6038 rc
= ata_bus_probe(ap
);
6039 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6042 /* FIXME: do something useful here?
6043 * Current libata behavior will
6044 * tear down everything when
6045 * the module is removed
6046 * or the h/w is unplugged.
6051 /* in order to keep device order, we need to synchronize at this point */
6052 async_synchronize_cookie(cookie
);
6054 ata_scsi_scan_host(ap
, 1);
6058 * ata_host_register - register initialized ATA host
6059 * @host: ATA host to register
6060 * @sht: template for SCSI host
6062 * Register initialized ATA host. @host is allocated using
6063 * ata_host_alloc() and fully initialized by LLD. This function
6064 * starts ports, registers @host with ATA and SCSI layers and
6065 * probe registered devices.
6068 * Inherited from calling layer (may sleep).
6071 * 0 on success, -errno otherwise.
6073 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6077 /* host must have been started */
6078 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6079 dev_printk(KERN_ERR
, host
->dev
,
6080 "BUG: trying to register unstarted host\n");
6085 /* Blow away unused ports. This happens when LLD can't
6086 * determine the exact number of ports to allocate at
6089 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6090 kfree(host
->ports
[i
]);
6092 /* give ports names and add SCSI hosts */
6093 for (i
= 0; i
< host
->n_ports
; i
++)
6094 host
->ports
[i
]->print_id
= ata_print_id
++;
6096 rc
= ata_scsi_add_hosts(host
, sht
);
6100 /* associate with ACPI nodes */
6101 ata_acpi_associate(host
);
6103 /* set cable, sata_spd_limit and report */
6104 for (i
= 0; i
< host
->n_ports
; i
++) {
6105 struct ata_port
*ap
= host
->ports
[i
];
6106 unsigned long xfer_mask
;
6108 /* set SATA cable type if still unset */
6109 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6110 ap
->cbl
= ATA_CBL_SATA
;
6112 /* init sata_spd_limit to the current value */
6113 sata_link_init_spd(&ap
->link
);
6115 sata_link_init_spd(ap
->slave_link
);
6117 /* print per-port info to dmesg */
6118 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6121 if (!ata_port_is_dummy(ap
)) {
6122 ata_port_printk(ap
, KERN_INFO
,
6123 "%cATA max %s %s\n",
6124 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6125 ata_mode_string(xfer_mask
),
6126 ap
->link
.eh_info
.desc
);
6127 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6129 ata_port_printk(ap
, KERN_INFO
, "DUMMY\n");
6132 /* perform each probe asynchronously */
6133 for (i
= 0; i
< host
->n_ports
; i
++) {
6134 struct ata_port
*ap
= host
->ports
[i
];
6135 async_schedule(async_port_probe
, ap
);
6142 * ata_host_activate - start host, request IRQ and register it
6143 * @host: target ATA host
6144 * @irq: IRQ to request
6145 * @irq_handler: irq_handler used when requesting IRQ
6146 * @irq_flags: irq_flags used when requesting IRQ
6147 * @sht: scsi_host_template to use when registering the host
6149 * After allocating an ATA host and initializing it, most libata
6150 * LLDs perform three steps to activate the host - start host,
6151 * request IRQ and register it. This helper takes necessasry
6152 * arguments and performs the three steps in one go.
6154 * An invalid IRQ skips the IRQ registration and expects the host to
6155 * have set polling mode on the port. In this case, @irq_handler
6159 * Inherited from calling layer (may sleep).
6162 * 0 on success, -errno otherwise.
6164 int ata_host_activate(struct ata_host
*host
, int irq
,
6165 irq_handler_t irq_handler
, unsigned long irq_flags
,
6166 struct scsi_host_template
*sht
)
6170 rc
= ata_host_start(host
);
6174 /* Special case for polling mode */
6176 WARN_ON(irq_handler
);
6177 return ata_host_register(host
, sht
);
6180 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6181 dev_driver_string(host
->dev
), host
);
6185 for (i
= 0; i
< host
->n_ports
; i
++)
6186 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6188 rc
= ata_host_register(host
, sht
);
6189 /* if failed, just free the IRQ and leave ports alone */
6191 devm_free_irq(host
->dev
, irq
, host
);
6197 * ata_port_detach - Detach ATA port in prepration of device removal
6198 * @ap: ATA port to be detached
6200 * Detach all ATA devices and the associated SCSI devices of @ap;
6201 * then, remove the associated SCSI host. @ap is guaranteed to
6202 * be quiescent on return from this function.
6205 * Kernel thread context (may sleep).
6207 static void ata_port_detach(struct ata_port
*ap
)
6209 unsigned long flags
;
6211 if (!ap
->ops
->error_handler
)
6214 /* tell EH we're leaving & flush EH */
6215 spin_lock_irqsave(ap
->lock
, flags
);
6216 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6217 ata_port_schedule_eh(ap
);
6218 spin_unlock_irqrestore(ap
->lock
, flags
);
6220 /* wait till EH commits suicide */
6221 ata_port_wait_eh(ap
);
6223 /* it better be dead now */
6224 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
6226 cancel_rearming_delayed_work(&ap
->hotplug_task
);
6229 /* remove the associated SCSI host */
6230 scsi_remove_host(ap
->scsi_host
);
6234 * ata_host_detach - Detach all ports of an ATA host
6235 * @host: Host to detach
6237 * Detach all ports of @host.
6240 * Kernel thread context (may sleep).
6242 void ata_host_detach(struct ata_host
*host
)
6246 for (i
= 0; i
< host
->n_ports
; i
++)
6247 ata_port_detach(host
->ports
[i
]);
6249 /* the host is dead now, dissociate ACPI */
6250 ata_acpi_dissociate(host
);
6256 * ata_pci_remove_one - PCI layer callback for device removal
6257 * @pdev: PCI device that was removed
6259 * PCI layer indicates to libata via this hook that hot-unplug or
6260 * module unload event has occurred. Detach all ports. Resource
6261 * release is handled via devres.
6264 * Inherited from PCI layer (may sleep).
6266 void ata_pci_remove_one(struct pci_dev
*pdev
)
6268 struct device
*dev
= &pdev
->dev
;
6269 struct ata_host
*host
= dev_get_drvdata(dev
);
6271 ata_host_detach(host
);
6274 /* move to PCI subsystem */
6275 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6277 unsigned long tmp
= 0;
6279 switch (bits
->width
) {
6282 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6288 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6294 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6305 return (tmp
== bits
->val
) ? 1 : 0;
6309 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6311 pci_save_state(pdev
);
6312 pci_disable_device(pdev
);
6314 if (mesg
.event
& PM_EVENT_SLEEP
)
6315 pci_set_power_state(pdev
, PCI_D3hot
);
6318 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6322 pci_set_power_state(pdev
, PCI_D0
);
6323 pci_restore_state(pdev
);
6325 rc
= pcim_enable_device(pdev
);
6327 dev_printk(KERN_ERR
, &pdev
->dev
,
6328 "failed to enable device after resume (%d)\n", rc
);
6332 pci_set_master(pdev
);
6336 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6338 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6341 rc
= ata_host_suspend(host
, mesg
);
6345 ata_pci_device_do_suspend(pdev
, mesg
);
6350 int ata_pci_device_resume(struct pci_dev
*pdev
)
6352 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6355 rc
= ata_pci_device_do_resume(pdev
);
6357 ata_host_resume(host
);
6360 #endif /* CONFIG_PM */
6362 #endif /* CONFIG_PCI */
6364 static int __init
ata_parse_force_one(char **cur
,
6365 struct ata_force_ent
*force_ent
,
6366 const char **reason
)
6368 /* FIXME: Currently, there's no way to tag init const data and
6369 * using __initdata causes build failure on some versions of
6370 * gcc. Once __initdataconst is implemented, add const to the
6371 * following structure.
6373 static struct ata_force_param force_tbl
[] __initdata
= {
6374 { "40c", .cbl
= ATA_CBL_PATA40
},
6375 { "80c", .cbl
= ATA_CBL_PATA80
},
6376 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6377 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6378 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6379 { "sata", .cbl
= ATA_CBL_SATA
},
6380 { "1.5Gbps", .spd_limit
= 1 },
6381 { "3.0Gbps", .spd_limit
= 2 },
6382 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6383 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6384 { "dump_id", .horkage_on
= ATA_HORKAGE_DUMP_ID
},
6385 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6386 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6387 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6388 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6389 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6390 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6391 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6392 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6393 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6394 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6395 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6396 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6397 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6398 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6399 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6400 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6401 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6402 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6403 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6404 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6405 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6406 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6407 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6408 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6409 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6410 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6411 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6412 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6413 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6414 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6415 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6416 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6417 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6418 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6419 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6420 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6421 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6423 char *start
= *cur
, *p
= *cur
;
6424 char *id
, *val
, *endp
;
6425 const struct ata_force_param
*match_fp
= NULL
;
6426 int nr_matches
= 0, i
;
6428 /* find where this param ends and update *cur */
6429 while (*p
!= '\0' && *p
!= ',')
6440 p
= strchr(start
, ':');
6442 val
= strstrip(start
);
6447 id
= strstrip(start
);
6448 val
= strstrip(p
+ 1);
6451 p
= strchr(id
, '.');
6454 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6455 if (p
== endp
|| *endp
!= '\0') {
6456 *reason
= "invalid device";
6461 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6462 if (p
== endp
|| *endp
!= '\0') {
6463 *reason
= "invalid port/link";
6468 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6469 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6470 const struct ata_force_param
*fp
= &force_tbl
[i
];
6472 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6478 if (strcasecmp(val
, fp
->name
) == 0) {
6485 *reason
= "unknown value";
6488 if (nr_matches
> 1) {
6489 *reason
= "ambigious value";
6493 force_ent
->param
= *match_fp
;
6498 static void __init
ata_parse_force_param(void)
6500 int idx
= 0, size
= 1;
6501 int last_port
= -1, last_device
= -1;
6502 char *p
, *cur
, *next
;
6504 /* calculate maximum number of params and allocate force_tbl */
6505 for (p
= ata_force_param_buf
; *p
; p
++)
6509 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6510 if (!ata_force_tbl
) {
6511 printk(KERN_WARNING
"ata: failed to extend force table, "
6512 "libata.force ignored\n");
6516 /* parse and populate the table */
6517 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6518 const char *reason
= "";
6519 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6522 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6523 printk(KERN_WARNING
"ata: failed to parse force "
6524 "parameter \"%s\" (%s)\n",
6529 if (te
.port
== -1) {
6530 te
.port
= last_port
;
6531 te
.device
= last_device
;
6534 ata_force_tbl
[idx
++] = te
;
6536 last_port
= te
.port
;
6537 last_device
= te
.device
;
6540 ata_force_tbl_size
= idx
;
6543 static int __init
ata_init(void)
6547 ata_parse_force_param();
6549 rc
= ata_sff_init();
6551 kfree(ata_force_tbl
);
6555 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6559 static void __exit
ata_exit(void)
6562 kfree(ata_force_tbl
);
6565 subsys_initcall(ata_init
);
6566 module_exit(ata_exit
);
6568 static DEFINE_RATELIMIT_STATE(ratelimit
, HZ
/ 5, 1);
6570 int ata_ratelimit(void)
6572 return __ratelimit(&ratelimit
);
6576 * ata_wait_register - wait until register value changes
6577 * @reg: IO-mapped register
6578 * @mask: Mask to apply to read register value
6579 * @val: Wait condition
6580 * @interval: polling interval in milliseconds
6581 * @timeout: timeout in milliseconds
6583 * Waiting for some bits of register to change is a common
6584 * operation for ATA controllers. This function reads 32bit LE
6585 * IO-mapped register @reg and tests for the following condition.
6587 * (*@reg & mask) != val
6589 * If the condition is met, it returns; otherwise, the process is
6590 * repeated after @interval_msec until timeout.
6593 * Kernel thread context (may sleep)
6596 * The final register value.
6598 u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
6599 unsigned long interval
, unsigned long timeout
)
6601 unsigned long deadline
;
6604 tmp
= ioread32(reg
);
6606 /* Calculate timeout _after_ the first read to make sure
6607 * preceding writes reach the controller before starting to
6608 * eat away the timeout.
6610 deadline
= ata_deadline(jiffies
, timeout
);
6612 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6614 tmp
= ioread32(reg
);
6623 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6625 return AC_ERR_SYSTEM
;
6628 static void ata_dummy_error_handler(struct ata_port
*ap
)
6633 struct ata_port_operations ata_dummy_port_ops
= {
6634 .qc_prep
= ata_noop_qc_prep
,
6635 .qc_issue
= ata_dummy_qc_issue
,
6636 .error_handler
= ata_dummy_error_handler
,
6639 const struct ata_port_info ata_dummy_port_info
= {
6640 .port_ops
= &ata_dummy_port_ops
,
6644 * libata is essentially a library of internal helper functions for
6645 * low-level ATA host controller drivers. As such, the API/ABI is
6646 * likely to change as new drivers are added and updated.
6647 * Do not depend on ABI/API stability.
6649 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6650 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6651 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6652 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6653 EXPORT_SYMBOL_GPL(sata_port_ops
);
6654 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6655 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6656 EXPORT_SYMBOL_GPL(ata_link_next
);
6657 EXPORT_SYMBOL_GPL(ata_dev_next
);
6658 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6659 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity
);
6660 EXPORT_SYMBOL_GPL(ata_host_init
);
6661 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6662 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6663 EXPORT_SYMBOL_GPL(ata_slave_link_init
);
6664 EXPORT_SYMBOL_GPL(ata_host_start
);
6665 EXPORT_SYMBOL_GPL(ata_host_register
);
6666 EXPORT_SYMBOL_GPL(ata_host_activate
);
6667 EXPORT_SYMBOL_GPL(ata_host_detach
);
6668 EXPORT_SYMBOL_GPL(ata_sg_init
);
6669 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6670 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6671 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6672 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6673 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6674 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6675 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6676 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6677 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6678 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6679 EXPORT_SYMBOL_GPL(ata_mode_string
);
6680 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6681 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6682 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6683 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6684 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6685 EXPORT_SYMBOL_GPL(sata_set_spd
);
6686 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6687 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6688 EXPORT_SYMBOL_GPL(sata_link_resume
);
6689 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6690 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6691 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6692 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6693 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6694 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6695 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6696 EXPORT_SYMBOL_GPL(ata_wait_register
);
6697 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6698 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6699 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6700 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6701 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6702 EXPORT_SYMBOL_GPL(sata_scr_read
);
6703 EXPORT_SYMBOL_GPL(sata_scr_write
);
6704 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6705 EXPORT_SYMBOL_GPL(ata_link_online
);
6706 EXPORT_SYMBOL_GPL(ata_link_offline
);
6708 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6709 EXPORT_SYMBOL_GPL(ata_host_resume
);
6710 #endif /* CONFIG_PM */
6711 EXPORT_SYMBOL_GPL(ata_id_string
);
6712 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6713 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6714 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6716 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6717 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6718 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6719 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6720 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6723 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6724 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6726 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6727 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6728 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6729 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6730 #endif /* CONFIG_PM */
6731 #endif /* CONFIG_PCI */
6733 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6734 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6735 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6736 EXPORT_SYMBOL_GPL(ata_port_desc
);
6738 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6739 #endif /* CONFIG_PCI */
6740 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6741 EXPORT_SYMBOL_GPL(ata_link_abort
);
6742 EXPORT_SYMBOL_GPL(ata_port_abort
);
6743 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6744 EXPORT_SYMBOL_GPL(sata_async_notification
);
6745 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6746 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6747 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6748 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6749 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6750 EXPORT_SYMBOL_GPL(ata_do_eh
);
6751 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6753 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6754 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6755 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6756 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6757 EXPORT_SYMBOL_GPL(ata_cable_sata
);