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>
69 #include <linux/pm_runtime.h>
72 #include "libata-transport.h"
74 /* debounce timing parameters in msecs { interval, duration, timeout } */
75 const unsigned long sata_deb_timing_normal
[] = { 5, 100, 2000 };
76 const unsigned long sata_deb_timing_hotplug
[] = { 25, 500, 2000 };
77 const unsigned long sata_deb_timing_long
[] = { 100, 2000, 5000 };
79 const struct ata_port_operations ata_base_port_ops
= {
80 .prereset
= ata_std_prereset
,
81 .postreset
= ata_std_postreset
,
82 .error_handler
= ata_std_error_handler
,
85 const struct ata_port_operations sata_port_ops
= {
86 .inherits
= &ata_base_port_ops
,
88 .qc_defer
= ata_std_qc_defer
,
89 .hardreset
= sata_std_hardreset
,
92 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
93 u16 heads
, u16 sectors
);
94 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
95 static void ata_dev_xfermask(struct ata_device
*dev
);
96 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
98 atomic_t ata_print_id
= ATOMIC_INIT(0);
100 struct ata_force_param
{
104 unsigned long xfer_mask
;
105 unsigned int horkage_on
;
106 unsigned int horkage_off
;
110 struct ata_force_ent
{
113 struct ata_force_param param
;
116 static struct ata_force_ent
*ata_force_tbl
;
117 static int ata_force_tbl_size
;
119 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
120 /* param_buf is thrown away after initialization, disallow read */
121 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
122 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
124 static int atapi_enabled
= 1;
125 module_param(atapi_enabled
, int, 0444);
126 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
128 static int atapi_dmadir
= 0;
129 module_param(atapi_dmadir
, int, 0444);
130 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
132 int atapi_passthru16
= 1;
133 module_param(atapi_passthru16
, int, 0444);
134 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
137 module_param_named(fua
, libata_fua
, int, 0444);
138 MODULE_PARM_DESC(fua
, "FUA support (0=off [default], 1=on)");
140 static int ata_ignore_hpa
;
141 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
142 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
144 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
145 module_param_named(dma
, libata_dma_mask
, int, 0444);
146 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
148 static int ata_probe_timeout
;
149 module_param(ata_probe_timeout
, int, 0444);
150 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
152 int libata_noacpi
= 0;
153 module_param_named(noacpi
, libata_noacpi
, int, 0444);
154 MODULE_PARM_DESC(noacpi
, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
156 int libata_allow_tpm
= 0;
157 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
158 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands (0=off [default], 1=on)");
161 module_param(atapi_an
, int, 0444);
162 MODULE_PARM_DESC(atapi_an
, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
164 MODULE_AUTHOR("Jeff Garzik");
165 MODULE_DESCRIPTION("Library module for ATA devices");
166 MODULE_LICENSE("GPL");
167 MODULE_VERSION(DRV_VERSION
);
170 static bool ata_sstatus_online(u32 sstatus
)
172 return (sstatus
& 0xf) == 0x3;
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
182 * Host lock or EH context.
185 * Pointer to the next link.
187 struct ata_link
*ata_link_next(struct ata_link
*link
, struct ata_port
*ap
,
188 enum ata_link_iter_mode mode
)
190 BUG_ON(mode
!= ATA_LITER_EDGE
&&
191 mode
!= ATA_LITER_PMP_FIRST
&& mode
!= ATA_LITER_HOST_FIRST
);
193 /* NULL link indicates start of iteration */
197 case ATA_LITER_PMP_FIRST
:
198 if (sata_pmp_attached(ap
))
201 case ATA_LITER_HOST_FIRST
:
205 /* we just iterated over the host link, what's next? */
206 if (link
== &ap
->link
)
208 case ATA_LITER_HOST_FIRST
:
209 if (sata_pmp_attached(ap
))
212 case ATA_LITER_PMP_FIRST
:
213 if (unlikely(ap
->slave_link
))
214 return ap
->slave_link
;
220 /* slave_link excludes PMP */
221 if (unlikely(link
== ap
->slave_link
))
224 /* we were over a PMP link */
225 if (++link
< ap
->pmp_link
+ ap
->nr_pmp_links
)
228 if (mode
== ATA_LITER_PMP_FIRST
)
235 * ata_dev_next - device iteration helper
236 * @dev: the previous device, NULL to start
237 * @link: ATA link containing devices to iterate
238 * @mode: iteration mode, one of ATA_DITER_*
241 * Host lock or EH context.
244 * Pointer to the next device.
246 struct ata_device
*ata_dev_next(struct ata_device
*dev
, struct ata_link
*link
,
247 enum ata_dev_iter_mode mode
)
249 BUG_ON(mode
!= ATA_DITER_ENABLED
&& mode
!= ATA_DITER_ENABLED_REVERSE
&&
250 mode
!= ATA_DITER_ALL
&& mode
!= ATA_DITER_ALL_REVERSE
);
252 /* NULL dev indicates start of iteration */
255 case ATA_DITER_ENABLED
:
259 case ATA_DITER_ENABLED_REVERSE
:
260 case ATA_DITER_ALL_REVERSE
:
261 dev
= link
->device
+ ata_link_max_devices(link
) - 1;
266 /* move to the next one */
268 case ATA_DITER_ENABLED
:
270 if (++dev
< link
->device
+ ata_link_max_devices(link
))
273 case ATA_DITER_ENABLED_REVERSE
:
274 case ATA_DITER_ALL_REVERSE
:
275 if (--dev
>= link
->device
)
281 if ((mode
== ATA_DITER_ENABLED
|| mode
== ATA_DITER_ENABLED_REVERSE
) &&
282 !ata_dev_enabled(dev
))
288 * ata_dev_phys_link - find physical link for a device
289 * @dev: ATA device to look up physical link for
291 * Look up physical link which @dev is attached to. Note that
292 * this is different from @dev->link only when @dev is on slave
293 * link. For all other cases, it's the same as @dev->link.
299 * Pointer to the found physical link.
301 struct ata_link
*ata_dev_phys_link(struct ata_device
*dev
)
303 struct ata_port
*ap
= dev
->link
->ap
;
309 return ap
->slave_link
;
313 * ata_force_cbl - force cable type according to libata.force
314 * @ap: ATA port of interest
316 * Force cable type according to libata.force and whine about it.
317 * The last entry which has matching port number is used, so it
318 * can be specified as part of device force parameters. For
319 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
325 void ata_force_cbl(struct ata_port
*ap
)
329 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
330 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
332 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
335 if (fe
->param
.cbl
== ATA_CBL_NONE
)
338 ap
->cbl
= fe
->param
.cbl
;
339 ata_port_notice(ap
, "FORCE: cable set to %s\n", fe
->param
.name
);
345 * ata_force_link_limits - force link limits according to libata.force
346 * @link: ATA link of interest
348 * Force link flags and SATA spd limit according to libata.force
349 * and whine about it. When only the port part is specified
350 * (e.g. 1:), the limit applies to all links connected to both
351 * the host link and all fan-out ports connected via PMP. If the
352 * device part is specified as 0 (e.g. 1.00:), it specifies the
353 * first fan-out link not the host link. Device number 15 always
354 * points to the host link whether PMP is attached or not. If the
355 * controller has slave link, device number 16 points to it.
360 static void ata_force_link_limits(struct ata_link
*link
)
362 bool did_spd
= false;
363 int linkno
= link
->pmp
;
366 if (ata_is_host_link(link
))
369 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
370 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
372 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
375 if (fe
->device
!= -1 && fe
->device
!= linkno
)
378 /* only honor the first spd limit */
379 if (!did_spd
&& fe
->param
.spd_limit
) {
380 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
381 ata_link_notice(link
, "FORCE: PHY spd limit set to %s\n",
386 /* let lflags stack */
387 if (fe
->param
.lflags
) {
388 link
->flags
|= fe
->param
.lflags
;
389 ata_link_notice(link
,
390 "FORCE: link flag 0x%x forced -> 0x%x\n",
391 fe
->param
.lflags
, link
->flags
);
397 * ata_force_xfermask - force xfermask according to libata.force
398 * @dev: ATA device of interest
400 * Force xfer_mask according to libata.force and whine about it.
401 * For consistency with link selection, device number 15 selects
402 * the first device connected to the host link.
407 static void ata_force_xfermask(struct ata_device
*dev
)
409 int devno
= dev
->link
->pmp
+ dev
->devno
;
410 int alt_devno
= devno
;
413 /* allow n.15/16 for devices attached to host port */
414 if (ata_is_host_link(dev
->link
))
417 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
418 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
419 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
421 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
424 if (fe
->device
!= -1 && fe
->device
!= devno
&&
425 fe
->device
!= alt_devno
)
428 if (!fe
->param
.xfer_mask
)
431 ata_unpack_xfermask(fe
->param
.xfer_mask
,
432 &pio_mask
, &mwdma_mask
, &udma_mask
);
434 dev
->udma_mask
= udma_mask
;
435 else if (mwdma_mask
) {
437 dev
->mwdma_mask
= mwdma_mask
;
441 dev
->pio_mask
= pio_mask
;
444 ata_dev_notice(dev
, "FORCE: xfer_mask set to %s\n",
451 * ata_force_horkage - force horkage according to libata.force
452 * @dev: ATA device of interest
454 * Force horkage according to libata.force and whine about it.
455 * For consistency with link selection, device number 15 selects
456 * the first device connected to the host link.
461 static void ata_force_horkage(struct ata_device
*dev
)
463 int devno
= dev
->link
->pmp
+ dev
->devno
;
464 int alt_devno
= devno
;
467 /* allow n.15/16 for devices attached to host port */
468 if (ata_is_host_link(dev
->link
))
471 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
472 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
474 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
477 if (fe
->device
!= -1 && fe
->device
!= devno
&&
478 fe
->device
!= alt_devno
)
481 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
482 !(dev
->horkage
& fe
->param
.horkage_off
))
485 dev
->horkage
|= fe
->param
.horkage_on
;
486 dev
->horkage
&= ~fe
->param
.horkage_off
;
488 ata_dev_notice(dev
, "FORCE: horkage modified (%s)\n",
494 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
495 * @opcode: SCSI opcode
497 * Determine ATAPI command type from @opcode.
503 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
505 int atapi_cmd_type(u8 opcode
)
514 case GPCMD_WRITE_AND_VERIFY_10
:
518 case GPCMD_READ_CD_MSF
:
519 return ATAPI_READ_CD
;
523 if (atapi_passthru16
)
524 return ATAPI_PASS_THRU
;
532 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
533 * @tf: Taskfile to convert
534 * @pmp: Port multiplier port
535 * @is_cmd: This FIS is for command
536 * @fis: Buffer into which data will output
538 * Converts a standard ATA taskfile to a Serial ATA
539 * FIS structure (Register - Host to Device).
542 * Inherited from caller.
544 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
546 fis
[0] = 0x27; /* Register - Host to Device FIS */
547 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
549 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
551 fis
[2] = tf
->command
;
552 fis
[3] = tf
->feature
;
559 fis
[8] = tf
->hob_lbal
;
560 fis
[9] = tf
->hob_lbam
;
561 fis
[10] = tf
->hob_lbah
;
562 fis
[11] = tf
->hob_feature
;
565 fis
[13] = tf
->hob_nsect
;
576 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
577 * @fis: Buffer from which data will be input
578 * @tf: Taskfile to output
580 * Converts a serial ATA FIS structure to a standard ATA taskfile.
583 * Inherited from caller.
586 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
588 tf
->command
= fis
[2]; /* status */
589 tf
->feature
= fis
[3]; /* error */
596 tf
->hob_lbal
= fis
[8];
597 tf
->hob_lbam
= fis
[9];
598 tf
->hob_lbah
= fis
[10];
601 tf
->hob_nsect
= fis
[13];
604 static const u8 ata_rw_cmds
[] = {
608 ATA_CMD_READ_MULTI_EXT
,
609 ATA_CMD_WRITE_MULTI_EXT
,
613 ATA_CMD_WRITE_MULTI_FUA_EXT
,
617 ATA_CMD_PIO_READ_EXT
,
618 ATA_CMD_PIO_WRITE_EXT
,
631 ATA_CMD_WRITE_FUA_EXT
635 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
636 * @tf: command to examine and configure
637 * @dev: device tf belongs to
639 * Examine the device configuration and tf->flags to calculate
640 * the proper read/write commands and protocol to use.
645 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
649 int index
, fua
, lba48
, write
;
651 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
652 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
653 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
655 if (dev
->flags
& ATA_DFLAG_PIO
) {
656 tf
->protocol
= ATA_PROT_PIO
;
657 index
= dev
->multi_count
? 0 : 8;
658 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
659 /* Unable to use DMA due to host limitation */
660 tf
->protocol
= ATA_PROT_PIO
;
661 index
= dev
->multi_count
? 0 : 8;
663 tf
->protocol
= ATA_PROT_DMA
;
667 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
676 * ata_tf_read_block - Read block address from ATA taskfile
677 * @tf: ATA taskfile of interest
678 * @dev: ATA device @tf belongs to
683 * Read block address from @tf. This function can handle all
684 * three address formats - LBA, LBA48 and CHS. tf->protocol and
685 * flags select the address format to use.
688 * Block address read from @tf.
690 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
694 if (tf
->flags
& ATA_TFLAG_LBA
) {
695 if (tf
->flags
& ATA_TFLAG_LBA48
) {
696 block
|= (u64
)tf
->hob_lbah
<< 40;
697 block
|= (u64
)tf
->hob_lbam
<< 32;
698 block
|= (u64
)tf
->hob_lbal
<< 24;
700 block
|= (tf
->device
& 0xf) << 24;
702 block
|= tf
->lbah
<< 16;
703 block
|= tf
->lbam
<< 8;
708 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
709 head
= tf
->device
& 0xf;
714 "device reported invalid CHS sector 0\n");
715 sect
= 1; /* oh well */
718 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
- 1;
725 * ata_build_rw_tf - Build ATA taskfile for given read/write request
726 * @tf: Target ATA taskfile
727 * @dev: ATA device @tf belongs to
728 * @block: Block address
729 * @n_block: Number of blocks
730 * @tf_flags: RW/FUA etc...
736 * Build ATA taskfile @tf for read/write request described by
737 * @block, @n_block, @tf_flags and @tag on @dev.
741 * 0 on success, -ERANGE if the request is too large for @dev,
742 * -EINVAL if the request is invalid.
744 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
745 u64 block
, u32 n_block
, unsigned int tf_flags
,
748 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
749 tf
->flags
|= tf_flags
;
751 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
753 if (!lba_48_ok(block
, n_block
))
756 tf
->protocol
= ATA_PROT_NCQ
;
757 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
759 if (tf
->flags
& ATA_TFLAG_WRITE
)
760 tf
->command
= ATA_CMD_FPDMA_WRITE
;
762 tf
->command
= ATA_CMD_FPDMA_READ
;
764 tf
->nsect
= tag
<< 3;
765 tf
->hob_feature
= (n_block
>> 8) & 0xff;
766 tf
->feature
= n_block
& 0xff;
768 tf
->hob_lbah
= (block
>> 40) & 0xff;
769 tf
->hob_lbam
= (block
>> 32) & 0xff;
770 tf
->hob_lbal
= (block
>> 24) & 0xff;
771 tf
->lbah
= (block
>> 16) & 0xff;
772 tf
->lbam
= (block
>> 8) & 0xff;
773 tf
->lbal
= block
& 0xff;
776 if (tf
->flags
& ATA_TFLAG_FUA
)
777 tf
->device
|= 1 << 7;
778 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
779 tf
->flags
|= ATA_TFLAG_LBA
;
781 if (lba_28_ok(block
, n_block
)) {
783 tf
->device
|= (block
>> 24) & 0xf;
784 } else if (lba_48_ok(block
, n_block
)) {
785 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
789 tf
->flags
|= ATA_TFLAG_LBA48
;
791 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
793 tf
->hob_lbah
= (block
>> 40) & 0xff;
794 tf
->hob_lbam
= (block
>> 32) & 0xff;
795 tf
->hob_lbal
= (block
>> 24) & 0xff;
797 /* request too large even for LBA48 */
800 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
803 tf
->nsect
= n_block
& 0xff;
805 tf
->lbah
= (block
>> 16) & 0xff;
806 tf
->lbam
= (block
>> 8) & 0xff;
807 tf
->lbal
= block
& 0xff;
809 tf
->device
|= ATA_LBA
;
812 u32 sect
, head
, cyl
, track
;
814 /* The request -may- be too large for CHS addressing. */
815 if (!lba_28_ok(block
, n_block
))
818 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
821 /* Convert LBA to CHS */
822 track
= (u32
)block
/ dev
->sectors
;
823 cyl
= track
/ dev
->heads
;
824 head
= track
% dev
->heads
;
825 sect
= (u32
)block
% dev
->sectors
+ 1;
827 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
828 (u32
)block
, track
, cyl
, head
, sect
);
830 /* Check whether the converted CHS can fit.
834 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
837 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
848 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
849 * @pio_mask: pio_mask
850 * @mwdma_mask: mwdma_mask
851 * @udma_mask: udma_mask
853 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
854 * unsigned int xfer_mask.
862 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
863 unsigned long mwdma_mask
,
864 unsigned long udma_mask
)
866 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
867 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
868 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
872 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
873 * @xfer_mask: xfer_mask to unpack
874 * @pio_mask: resulting pio_mask
875 * @mwdma_mask: resulting mwdma_mask
876 * @udma_mask: resulting udma_mask
878 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
879 * Any NULL distination masks will be ignored.
881 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
882 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
885 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
887 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
889 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
892 static const struct ata_xfer_ent
{
896 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
897 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
898 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
903 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
904 * @xfer_mask: xfer_mask of interest
906 * Return matching XFER_* value for @xfer_mask. Only the highest
907 * bit of @xfer_mask is considered.
913 * Matching XFER_* value, 0xff if no match found.
915 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
917 int highbit
= fls(xfer_mask
) - 1;
918 const struct ata_xfer_ent
*ent
;
920 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
921 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
922 return ent
->base
+ highbit
- ent
->shift
;
927 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
928 * @xfer_mode: XFER_* of interest
930 * Return matching xfer_mask for @xfer_mode.
936 * Matching xfer_mask, 0 if no match found.
938 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
940 const struct ata_xfer_ent
*ent
;
942 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
943 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
944 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
945 & ~((1 << ent
->shift
) - 1);
950 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
951 * @xfer_mode: XFER_* of interest
953 * Return matching xfer_shift for @xfer_mode.
959 * Matching xfer_shift, -1 if no match found.
961 int ata_xfer_mode2shift(unsigned long xfer_mode
)
963 const struct ata_xfer_ent
*ent
;
965 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
966 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
972 * ata_mode_string - convert xfer_mask to string
973 * @xfer_mask: mask of bits supported; only highest bit counts.
975 * Determine string which represents the highest speed
976 * (highest bit in @modemask).
982 * Constant C string representing highest speed listed in
983 * @mode_mask, or the constant C string "<n/a>".
985 const char *ata_mode_string(unsigned long xfer_mask
)
987 static const char * const xfer_mode_str
[] = {
1011 highbit
= fls(xfer_mask
) - 1;
1012 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
1013 return xfer_mode_str
[highbit
];
1017 const char *sata_spd_string(unsigned int spd
)
1019 static const char * const spd_str
[] = {
1025 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
1027 return spd_str
[spd
- 1];
1031 * ata_dev_classify - determine device type based on ATA-spec signature
1032 * @tf: ATA taskfile register set for device to be identified
1034 * Determine from taskfile register contents whether a device is
1035 * ATA or ATAPI, as per "Signature and persistence" section
1036 * of ATA/PI spec (volume 1, sect 5.14).
1042 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1043 * %ATA_DEV_UNKNOWN the event of failure.
1045 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1047 /* Apple's open source Darwin code hints that some devices only
1048 * put a proper signature into the LBA mid/high registers,
1049 * So, we only check those. It's sufficient for uniqueness.
1051 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1052 * signatures for ATA and ATAPI devices attached on SerialATA,
1053 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1054 * spec has never mentioned about using different signatures
1055 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1056 * Multiplier specification began to use 0x69/0x96 to identify
1057 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1058 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1059 * 0x69/0x96 shortly and described them as reserved for
1062 * We follow the current spec and consider that 0x69/0x96
1063 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1064 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1065 * SEMB signature. This is worked around in
1066 * ata_dev_read_id().
1068 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1069 DPRINTK("found ATA device by sig\n");
1073 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1074 DPRINTK("found ATAPI device by sig\n");
1075 return ATA_DEV_ATAPI
;
1078 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1079 DPRINTK("found PMP device by sig\n");
1083 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1084 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1085 return ATA_DEV_SEMB
;
1088 DPRINTK("unknown device\n");
1089 return ATA_DEV_UNKNOWN
;
1093 * ata_id_string - Convert IDENTIFY DEVICE page into string
1094 * @id: IDENTIFY DEVICE results we will examine
1095 * @s: string into which data is output
1096 * @ofs: offset into identify device page
1097 * @len: length of string to return. must be an even number.
1099 * The strings in the IDENTIFY DEVICE page are broken up into
1100 * 16-bit chunks. Run through the string, and output each
1101 * 8-bit chunk linearly, regardless of platform.
1107 void ata_id_string(const u16
*id
, unsigned char *s
,
1108 unsigned int ofs
, unsigned int len
)
1129 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1130 * @id: IDENTIFY DEVICE results we will examine
1131 * @s: string into which data is output
1132 * @ofs: offset into identify device page
1133 * @len: length of string to return. must be an odd number.
1135 * This function is identical to ata_id_string except that it
1136 * trims trailing spaces and terminates the resulting string with
1137 * null. @len must be actual maximum length (even number) + 1.
1142 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1143 unsigned int ofs
, unsigned int len
)
1147 ata_id_string(id
, s
, ofs
, len
- 1);
1149 p
= s
+ strnlen(s
, len
- 1);
1150 while (p
> s
&& p
[-1] == ' ')
1155 static u64
ata_id_n_sectors(const u16
*id
)
1157 if (ata_id_has_lba(id
)) {
1158 if (ata_id_has_lba48(id
))
1159 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1161 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1163 if (ata_id_current_chs_valid(id
))
1164 return id
[ATA_ID_CUR_CYLS
] * id
[ATA_ID_CUR_HEADS
] *
1165 id
[ATA_ID_CUR_SECTORS
];
1167 return id
[ATA_ID_CYLS
] * id
[ATA_ID_HEADS
] *
1172 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1176 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1177 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1178 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1179 sectors
|= (tf
->lbah
& 0xff) << 16;
1180 sectors
|= (tf
->lbam
& 0xff) << 8;
1181 sectors
|= (tf
->lbal
& 0xff);
1186 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1190 sectors
|= (tf
->device
& 0x0f) << 24;
1191 sectors
|= (tf
->lbah
& 0xff) << 16;
1192 sectors
|= (tf
->lbam
& 0xff) << 8;
1193 sectors
|= (tf
->lbal
& 0xff);
1199 * ata_read_native_max_address - Read native max address
1200 * @dev: target device
1201 * @max_sectors: out parameter for the result native max address
1203 * Perform an LBA48 or LBA28 native size query upon the device in
1207 * 0 on success, -EACCES if command is aborted by the drive.
1208 * -EIO on other errors.
1210 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1212 unsigned int err_mask
;
1213 struct ata_taskfile tf
;
1214 int lba48
= ata_id_has_lba48(dev
->id
);
1216 ata_tf_init(dev
, &tf
);
1218 /* always clear all address registers */
1219 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1222 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1223 tf
.flags
|= ATA_TFLAG_LBA48
;
1225 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1227 tf
.protocol
|= ATA_PROT_NODATA
;
1228 tf
.device
|= ATA_LBA
;
1230 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1233 "failed to read native max address (err_mask=0x%x)\n",
1235 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1241 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1243 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1244 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1250 * ata_set_max_sectors - Set max sectors
1251 * @dev: target device
1252 * @new_sectors: new max sectors value to set for the device
1254 * Set max sectors of @dev to @new_sectors.
1257 * 0 on success, -EACCES if command is aborted or denied (due to
1258 * previous non-volatile SET_MAX) by the drive. -EIO on other
1261 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1263 unsigned int err_mask
;
1264 struct ata_taskfile tf
;
1265 int lba48
= ata_id_has_lba48(dev
->id
);
1269 ata_tf_init(dev
, &tf
);
1271 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1274 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1275 tf
.flags
|= ATA_TFLAG_LBA48
;
1277 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1278 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1279 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1281 tf
.command
= ATA_CMD_SET_MAX
;
1283 tf
.device
|= (new_sectors
>> 24) & 0xf;
1286 tf
.protocol
|= ATA_PROT_NODATA
;
1287 tf
.device
|= ATA_LBA
;
1289 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1290 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1291 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1293 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1296 "failed to set max address (err_mask=0x%x)\n",
1298 if (err_mask
== AC_ERR_DEV
&&
1299 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1308 * ata_hpa_resize - Resize a device with an HPA set
1309 * @dev: Device to resize
1311 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1312 * it if required to the full size of the media. The caller must check
1313 * the drive has the HPA feature set enabled.
1316 * 0 on success, -errno on failure.
1318 static int ata_hpa_resize(struct ata_device
*dev
)
1320 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1321 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1322 bool unlock_hpa
= ata_ignore_hpa
|| dev
->flags
& ATA_DFLAG_UNLOCK_HPA
;
1323 u64 sectors
= ata_id_n_sectors(dev
->id
);
1327 /* do we need to do it? */
1328 if (dev
->class != ATA_DEV_ATA
||
1329 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1330 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1333 /* read native max address */
1334 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1336 /* If device aborted the command or HPA isn't going to
1337 * be unlocked, skip HPA resizing.
1339 if (rc
== -EACCES
|| !unlock_hpa
) {
1341 "HPA support seems broken, skipping HPA handling\n");
1342 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1344 /* we can continue if device aborted the command */
1351 dev
->n_native_sectors
= native_sectors
;
1353 /* nothing to do? */
1354 if (native_sectors
<= sectors
|| !unlock_hpa
) {
1355 if (!print_info
|| native_sectors
== sectors
)
1358 if (native_sectors
> sectors
)
1360 "HPA detected: current %llu, native %llu\n",
1361 (unsigned long long)sectors
,
1362 (unsigned long long)native_sectors
);
1363 else if (native_sectors
< sectors
)
1365 "native sectors (%llu) is smaller than sectors (%llu)\n",
1366 (unsigned long long)native_sectors
,
1367 (unsigned long long)sectors
);
1371 /* let's unlock HPA */
1372 rc
= ata_set_max_sectors(dev
, native_sectors
);
1373 if (rc
== -EACCES
) {
1374 /* if device aborted the command, skip HPA resizing */
1376 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1377 (unsigned long long)sectors
,
1378 (unsigned long long)native_sectors
);
1379 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1384 /* re-read IDENTIFY data */
1385 rc
= ata_dev_reread_id(dev
, 0);
1388 "failed to re-read IDENTIFY data after HPA resizing\n");
1393 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1395 "HPA unlocked: %llu -> %llu, native %llu\n",
1396 (unsigned long long)sectors
,
1397 (unsigned long long)new_sectors
,
1398 (unsigned long long)native_sectors
);
1405 * ata_dump_id - IDENTIFY DEVICE info debugging output
1406 * @id: IDENTIFY DEVICE page to dump
1408 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1415 static inline void ata_dump_id(const u16
*id
)
1417 DPRINTK("49==0x%04x "
1427 DPRINTK("80==0x%04x "
1437 DPRINTK("88==0x%04x "
1444 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1445 * @id: IDENTIFY data to compute xfer mask from
1447 * Compute the xfermask for this device. This is not as trivial
1448 * as it seems if we must consider early devices correctly.
1450 * FIXME: pre IDE drive timing (do we care ?).
1458 unsigned long ata_id_xfermask(const u16
*id
)
1460 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1462 /* Usual case. Word 53 indicates word 64 is valid */
1463 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1464 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1468 /* If word 64 isn't valid then Word 51 high byte holds
1469 * the PIO timing number for the maximum. Turn it into
1472 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1473 if (mode
< 5) /* Valid PIO range */
1474 pio_mask
= (2 << mode
) - 1;
1478 /* But wait.. there's more. Design your standards by
1479 * committee and you too can get a free iordy field to
1480 * process. However its the speeds not the modes that
1481 * are supported... Note drivers using the timing API
1482 * will get this right anyway
1486 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1488 if (ata_id_is_cfa(id
)) {
1490 * Process compact flash extended modes
1492 int pio
= (id
[ATA_ID_CFA_MODES
] >> 0) & 0x7;
1493 int dma
= (id
[ATA_ID_CFA_MODES
] >> 3) & 0x7;
1496 pio_mask
|= (1 << 5);
1498 pio_mask
|= (1 << 6);
1500 mwdma_mask
|= (1 << 3);
1502 mwdma_mask
|= (1 << 4);
1506 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1507 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1509 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1512 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1514 struct completion
*waiting
= qc
->private_data
;
1520 * ata_exec_internal_sg - execute libata internal command
1521 * @dev: Device to which the command is sent
1522 * @tf: Taskfile registers for the command and the result
1523 * @cdb: CDB for packet command
1524 * @dma_dir: Data tranfer direction of the command
1525 * @sgl: sg list for the data buffer of the command
1526 * @n_elem: Number of sg entries
1527 * @timeout: Timeout in msecs (0 for default)
1529 * Executes libata internal command with timeout. @tf contains
1530 * command on entry and result on return. Timeout and error
1531 * conditions are reported via return value. No recovery action
1532 * is taken after a command times out. It's caller's duty to
1533 * clean up after timeout.
1536 * None. Should be called with kernel context, might sleep.
1539 * Zero on success, AC_ERR_* mask on failure
1541 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1542 struct ata_taskfile
*tf
, const u8
*cdb
,
1543 int dma_dir
, struct scatterlist
*sgl
,
1544 unsigned int n_elem
, unsigned long timeout
)
1546 struct ata_link
*link
= dev
->link
;
1547 struct ata_port
*ap
= link
->ap
;
1548 u8 command
= tf
->command
;
1549 int auto_timeout
= 0;
1550 struct ata_queued_cmd
*qc
;
1551 unsigned int tag
, preempted_tag
;
1552 u32 preempted_sactive
, preempted_qc_active
;
1553 int preempted_nr_active_links
;
1554 DECLARE_COMPLETION_ONSTACK(wait
);
1555 unsigned long flags
;
1556 unsigned int err_mask
;
1559 spin_lock_irqsave(ap
->lock
, flags
);
1561 /* no internal command while frozen */
1562 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1563 spin_unlock_irqrestore(ap
->lock
, flags
);
1564 return AC_ERR_SYSTEM
;
1567 /* initialize internal qc */
1569 /* XXX: Tag 0 is used for drivers with legacy EH as some
1570 * drivers choke if any other tag is given. This breaks
1571 * ata_tag_internal() test for those drivers. Don't use new
1572 * EH stuff without converting to it.
1574 if (ap
->ops
->error_handler
)
1575 tag
= ATA_TAG_INTERNAL
;
1579 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1581 qc
= __ata_qc_from_tag(ap
, tag
);
1589 preempted_tag
= link
->active_tag
;
1590 preempted_sactive
= link
->sactive
;
1591 preempted_qc_active
= ap
->qc_active
;
1592 preempted_nr_active_links
= ap
->nr_active_links
;
1593 link
->active_tag
= ATA_TAG_POISON
;
1596 ap
->nr_active_links
= 0;
1598 /* prepare & issue qc */
1601 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1602 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1603 qc
->dma_dir
= dma_dir
;
1604 if (dma_dir
!= DMA_NONE
) {
1605 unsigned int i
, buflen
= 0;
1606 struct scatterlist
*sg
;
1608 for_each_sg(sgl
, sg
, n_elem
, i
)
1609 buflen
+= sg
->length
;
1611 ata_sg_init(qc
, sgl
, n_elem
);
1612 qc
->nbytes
= buflen
;
1615 qc
->private_data
= &wait
;
1616 qc
->complete_fn
= ata_qc_complete_internal
;
1620 spin_unlock_irqrestore(ap
->lock
, flags
);
1623 if (ata_probe_timeout
)
1624 timeout
= ata_probe_timeout
* 1000;
1626 timeout
= ata_internal_cmd_timeout(dev
, command
);
1631 if (ap
->ops
->error_handler
)
1634 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1636 if (ap
->ops
->error_handler
)
1639 ata_sff_flush_pio_task(ap
);
1642 spin_lock_irqsave(ap
->lock
, flags
);
1644 /* We're racing with irq here. If we lose, the
1645 * following test prevents us from completing the qc
1646 * twice. If we win, the port is frozen and will be
1647 * cleaned up by ->post_internal_cmd().
1649 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1650 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1652 if (ap
->ops
->error_handler
)
1653 ata_port_freeze(ap
);
1655 ata_qc_complete(qc
);
1657 if (ata_msg_warn(ap
))
1658 ata_dev_warn(dev
, "qc timeout (cmd 0x%x)\n",
1662 spin_unlock_irqrestore(ap
->lock
, flags
);
1665 /* do post_internal_cmd */
1666 if (ap
->ops
->post_internal_cmd
)
1667 ap
->ops
->post_internal_cmd(qc
);
1669 /* perform minimal error analysis */
1670 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1671 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1672 qc
->err_mask
|= AC_ERR_DEV
;
1675 qc
->err_mask
|= AC_ERR_OTHER
;
1677 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1678 qc
->err_mask
&= ~AC_ERR_OTHER
;
1682 spin_lock_irqsave(ap
->lock
, flags
);
1684 *tf
= qc
->result_tf
;
1685 err_mask
= qc
->err_mask
;
1688 link
->active_tag
= preempted_tag
;
1689 link
->sactive
= preempted_sactive
;
1690 ap
->qc_active
= preempted_qc_active
;
1691 ap
->nr_active_links
= preempted_nr_active_links
;
1693 spin_unlock_irqrestore(ap
->lock
, flags
);
1695 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1696 ata_internal_cmd_timed_out(dev
, command
);
1702 * ata_exec_internal - execute libata internal command
1703 * @dev: Device to which the command is sent
1704 * @tf: Taskfile registers for the command and the result
1705 * @cdb: CDB for packet command
1706 * @dma_dir: Data tranfer direction of the command
1707 * @buf: Data buffer of the command
1708 * @buflen: Length of data buffer
1709 * @timeout: Timeout in msecs (0 for default)
1711 * Wrapper around ata_exec_internal_sg() which takes simple
1712 * buffer instead of sg list.
1715 * None. Should be called with kernel context, might sleep.
1718 * Zero on success, AC_ERR_* mask on failure
1720 unsigned ata_exec_internal(struct ata_device
*dev
,
1721 struct ata_taskfile
*tf
, const u8
*cdb
,
1722 int dma_dir
, void *buf
, unsigned int buflen
,
1723 unsigned long timeout
)
1725 struct scatterlist
*psg
= NULL
, sg
;
1726 unsigned int n_elem
= 0;
1728 if (dma_dir
!= DMA_NONE
) {
1730 sg_init_one(&sg
, buf
, buflen
);
1735 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1740 * ata_do_simple_cmd - execute simple internal command
1741 * @dev: Device to which the command is sent
1742 * @cmd: Opcode to execute
1744 * Execute a 'simple' command, that only consists of the opcode
1745 * 'cmd' itself, without filling any other registers
1748 * Kernel thread context (may sleep).
1751 * Zero on success, AC_ERR_* mask on failure
1753 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1755 struct ata_taskfile tf
;
1757 ata_tf_init(dev
, &tf
);
1760 tf
.flags
|= ATA_TFLAG_DEVICE
;
1761 tf
.protocol
= ATA_PROT_NODATA
;
1763 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1767 * ata_pio_need_iordy - check if iordy needed
1770 * Check if the current speed of the device requires IORDY. Used
1771 * by various controllers for chip configuration.
1773 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1775 /* Don't set IORDY if we're preparing for reset. IORDY may
1776 * lead to controller lock up on certain controllers if the
1777 * port is not occupied. See bko#11703 for details.
1779 if (adev
->link
->ap
->pflags
& ATA_PFLAG_RESETTING
)
1781 /* Controller doesn't support IORDY. Probably a pointless
1782 * check as the caller should know this.
1784 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1786 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1787 if (ata_id_is_cfa(adev
->id
)
1788 && (adev
->pio_mode
== XFER_PIO_5
|| adev
->pio_mode
== XFER_PIO_6
))
1790 /* PIO3 and higher it is mandatory */
1791 if (adev
->pio_mode
> XFER_PIO_2
)
1793 /* We turn it on when possible */
1794 if (ata_id_has_iordy(adev
->id
))
1800 * ata_pio_mask_no_iordy - Return the non IORDY mask
1803 * Compute the highest mode possible if we are not using iordy. Return
1804 * -1 if no iordy mode is available.
1806 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1808 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1809 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1810 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1811 /* Is the speed faster than the drive allows non IORDY ? */
1813 /* This is cycle times not frequency - watch the logic! */
1814 if (pio
> 240) /* PIO2 is 240nS per cycle */
1815 return 3 << ATA_SHIFT_PIO
;
1816 return 7 << ATA_SHIFT_PIO
;
1819 return 3 << ATA_SHIFT_PIO
;
1823 * ata_do_dev_read_id - default ID read method
1825 * @tf: proposed taskfile
1828 * Issue the identify taskfile and hand back the buffer containing
1829 * identify data. For some RAID controllers and for pre ATA devices
1830 * this function is wrapped or replaced by the driver
1832 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
1833 struct ata_taskfile
*tf
, u16
*id
)
1835 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
1836 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1840 * ata_dev_read_id - Read ID data from the specified device
1841 * @dev: target device
1842 * @p_class: pointer to class of the target device (may be changed)
1843 * @flags: ATA_READID_* flags
1844 * @id: buffer to read IDENTIFY data into
1846 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1847 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1848 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1849 * for pre-ATA4 drives.
1851 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1852 * now we abort if we hit that case.
1855 * Kernel thread context (may sleep)
1858 * 0 on success, -errno otherwise.
1860 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1861 unsigned int flags
, u16
*id
)
1863 struct ata_port
*ap
= dev
->link
->ap
;
1864 unsigned int class = *p_class
;
1865 struct ata_taskfile tf
;
1866 unsigned int err_mask
= 0;
1868 bool is_semb
= class == ATA_DEV_SEMB
;
1869 int may_fallback
= 1, tried_spinup
= 0;
1872 if (ata_msg_ctl(ap
))
1873 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
1876 ata_tf_init(dev
, &tf
);
1880 class = ATA_DEV_ATA
; /* some hard drives report SEMB sig */
1882 tf
.command
= ATA_CMD_ID_ATA
;
1885 tf
.command
= ATA_CMD_ID_ATAPI
;
1889 reason
= "unsupported class";
1893 tf
.protocol
= ATA_PROT_PIO
;
1895 /* Some devices choke if TF registers contain garbage. Make
1896 * sure those are properly initialized.
1898 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1900 /* Device presence detection is unreliable on some
1901 * controllers. Always poll IDENTIFY if available.
1903 tf
.flags
|= ATA_TFLAG_POLLING
;
1905 if (ap
->ops
->read_id
)
1906 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
1908 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
1911 if (err_mask
& AC_ERR_NODEV_HINT
) {
1912 ata_dev_dbg(dev
, "NODEV after polling detection\n");
1918 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1919 /* SEMB is not supported yet */
1920 *p_class
= ATA_DEV_SEMB_UNSUP
;
1924 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1925 /* Device or controller might have reported
1926 * the wrong device class. Give a shot at the
1927 * other IDENTIFY if the current one is
1928 * aborted by the device.
1933 if (class == ATA_DEV_ATA
)
1934 class = ATA_DEV_ATAPI
;
1936 class = ATA_DEV_ATA
;
1940 /* Control reaches here iff the device aborted
1941 * both flavors of IDENTIFYs which happens
1942 * sometimes with phantom devices.
1945 "both IDENTIFYs aborted, assuming NODEV\n");
1950 reason
= "I/O error";
1954 if (dev
->horkage
& ATA_HORKAGE_DUMP_ID
) {
1955 ata_dev_dbg(dev
, "dumping IDENTIFY data, "
1956 "class=%d may_fallback=%d tried_spinup=%d\n",
1957 class, may_fallback
, tried_spinup
);
1958 print_hex_dump(KERN_DEBUG
, "", DUMP_PREFIX_OFFSET
,
1959 16, 2, id
, ATA_ID_WORDS
* sizeof(*id
), true);
1962 /* Falling back doesn't make sense if ID data was read
1963 * successfully at least once.
1967 swap_buf_le16(id
, ATA_ID_WORDS
);
1971 reason
= "device reports invalid type";
1973 if (class == ATA_DEV_ATA
) {
1974 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1976 if (ap
->host
->flags
& ATA_HOST_IGNORE_ATA
&&
1977 ata_id_is_ata(id
)) {
1979 "host indicates ignore ATA devices, ignored\n");
1983 if (ata_id_is_ata(id
))
1987 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1990 * Drive powered-up in standby mode, and requires a specific
1991 * SET_FEATURES spin-up subcommand before it will accept
1992 * anything other than the original IDENTIFY command.
1994 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1995 if (err_mask
&& id
[2] != 0x738c) {
1997 reason
= "SPINUP failed";
2001 * If the drive initially returned incomplete IDENTIFY info,
2002 * we now must reissue the IDENTIFY command.
2004 if (id
[2] == 0x37c8)
2008 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2010 * The exact sequence expected by certain pre-ATA4 drives is:
2012 * IDENTIFY (optional in early ATA)
2013 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2015 * Some drives were very specific about that exact sequence.
2017 * Note that ATA4 says lba is mandatory so the second check
2018 * should never trigger.
2020 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2021 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2024 reason
= "INIT_DEV_PARAMS failed";
2028 /* current CHS translation info (id[53-58]) might be
2029 * changed. reread the identify device info.
2031 flags
&= ~ATA_READID_POSTRESET
;
2041 if (ata_msg_warn(ap
))
2042 ata_dev_warn(dev
, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2047 static int ata_do_link_spd_horkage(struct ata_device
*dev
)
2049 struct ata_link
*plink
= ata_dev_phys_link(dev
);
2050 u32 target
, target_limit
;
2052 if (!sata_scr_valid(plink
))
2055 if (dev
->horkage
& ATA_HORKAGE_1_5_GBPS
)
2060 target_limit
= (1 << target
) - 1;
2062 /* if already on stricter limit, no need to push further */
2063 if (plink
->sata_spd_limit
<= target_limit
)
2066 plink
->sata_spd_limit
= target_limit
;
2068 /* Request another EH round by returning -EAGAIN if link is
2069 * going faster than the target speed. Forward progress is
2070 * guaranteed by setting sata_spd_limit to target_limit above.
2072 if (plink
->sata_spd
> target
) {
2073 ata_dev_info(dev
, "applying link speed limit horkage to %s\n",
2074 sata_spd_string(target
));
2080 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2082 struct ata_port
*ap
= dev
->link
->ap
;
2084 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_BRIDGE_OK
)
2087 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2090 static int ata_dev_config_ncq(struct ata_device
*dev
,
2091 char *desc
, size_t desc_sz
)
2093 struct ata_port
*ap
= dev
->link
->ap
;
2094 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2095 unsigned int err_mask
;
2098 if (!ata_id_has_ncq(dev
->id
)) {
2102 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2103 snprintf(desc
, desc_sz
, "NCQ (not used)");
2106 if (ap
->flags
& ATA_FLAG_NCQ
) {
2107 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2108 dev
->flags
|= ATA_DFLAG_NCQ
;
2111 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_FPDMA_AA
) &&
2112 (ap
->flags
& ATA_FLAG_FPDMA_AA
) &&
2113 ata_id_has_fpdma_aa(dev
->id
)) {
2114 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SATA_ENABLE
,
2118 "failed to enable AA (error_mask=0x%x)\n",
2120 if (err_mask
!= AC_ERR_DEV
) {
2121 dev
->horkage
|= ATA_HORKAGE_BROKEN_FPDMA_AA
;
2128 if (hdepth
>= ddepth
)
2129 snprintf(desc
, desc_sz
, "NCQ (depth %d)%s", ddepth
, aa_desc
);
2131 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)%s", hdepth
,
2137 * ata_dev_configure - Configure the specified ATA/ATAPI device
2138 * @dev: Target device to configure
2140 * Configure @dev according to @dev->id. Generic and low-level
2141 * driver specific fixups are also applied.
2144 * Kernel thread context (may sleep)
2147 * 0 on success, -errno otherwise
2149 int ata_dev_configure(struct ata_device
*dev
)
2151 struct ata_port
*ap
= dev
->link
->ap
;
2152 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2153 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2154 const u16
*id
= dev
->id
;
2155 unsigned long xfer_mask
;
2156 char revbuf
[7]; /* XYZ-99\0 */
2157 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2158 char modelbuf
[ATA_ID_PROD_LEN
+1];
2161 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2162 ata_dev_info(dev
, "%s: ENTER/EXIT -- nodev\n", __func__
);
2166 if (ata_msg_probe(ap
))
2167 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
2170 dev
->horkage
|= ata_dev_blacklisted(dev
);
2171 ata_force_horkage(dev
);
2173 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2174 ata_dev_info(dev
, "unsupported device, disabling\n");
2175 ata_dev_disable(dev
);
2179 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2180 dev
->class == ATA_DEV_ATAPI
) {
2181 ata_dev_warn(dev
, "WARNING: ATAPI is %s, device ignored\n",
2182 atapi_enabled
? "not supported with this driver"
2184 ata_dev_disable(dev
);
2188 rc
= ata_do_link_spd_horkage(dev
);
2192 /* let ACPI work its magic */
2193 rc
= ata_acpi_on_devcfg(dev
);
2197 /* massage HPA, do it early as it might change IDENTIFY data */
2198 rc
= ata_hpa_resize(dev
);
2202 /* print device capabilities */
2203 if (ata_msg_probe(ap
))
2205 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2206 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2208 id
[49], id
[82], id
[83], id
[84],
2209 id
[85], id
[86], id
[87], id
[88]);
2211 /* initialize to-be-configured parameters */
2212 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2213 dev
->max_sectors
= 0;
2219 dev
->multi_count
= 0;
2222 * common ATA, ATAPI feature tests
2225 /* find max transfer mode; for printk only */
2226 xfer_mask
= ata_id_xfermask(id
);
2228 if (ata_msg_probe(ap
))
2231 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2232 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2235 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2238 /* ATA-specific feature tests */
2239 if (dev
->class == ATA_DEV_ATA
) {
2240 if (ata_id_is_cfa(id
)) {
2241 /* CPRM may make this media unusable */
2242 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2244 "supports DRM functions and may not be fully accessible\n");
2245 snprintf(revbuf
, 7, "CFA");
2247 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2248 /* Warn the user if the device has TPM extensions */
2249 if (ata_id_has_tpm(id
))
2251 "supports DRM functions and may not be fully accessible\n");
2254 dev
->n_sectors
= ata_id_n_sectors(id
);
2256 /* get current R/W Multiple count setting */
2257 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2258 unsigned int max
= dev
->id
[47] & 0xff;
2259 unsigned int cnt
= dev
->id
[59] & 0xff;
2260 /* only recognize/allow powers of two here */
2261 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2263 dev
->multi_count
= cnt
;
2266 if (ata_id_has_lba(id
)) {
2267 const char *lba_desc
;
2271 dev
->flags
|= ATA_DFLAG_LBA
;
2272 if (ata_id_has_lba48(id
)) {
2273 dev
->flags
|= ATA_DFLAG_LBA48
;
2276 if (dev
->n_sectors
>= (1UL << 28) &&
2277 ata_id_has_flush_ext(id
))
2278 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2282 rc
= ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2286 /* print device info to dmesg */
2287 if (ata_msg_drv(ap
) && print_info
) {
2288 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2289 revbuf
, modelbuf
, fwrevbuf
,
2290 ata_mode_string(xfer_mask
));
2292 "%llu sectors, multi %u: %s %s\n",
2293 (unsigned long long)dev
->n_sectors
,
2294 dev
->multi_count
, lba_desc
, ncq_desc
);
2299 /* Default translation */
2300 dev
->cylinders
= id
[1];
2302 dev
->sectors
= id
[6];
2304 if (ata_id_current_chs_valid(id
)) {
2305 /* Current CHS translation is valid. */
2306 dev
->cylinders
= id
[54];
2307 dev
->heads
= id
[55];
2308 dev
->sectors
= id
[56];
2311 /* print device info to dmesg */
2312 if (ata_msg_drv(ap
) && print_info
) {
2313 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2314 revbuf
, modelbuf
, fwrevbuf
,
2315 ata_mode_string(xfer_mask
));
2317 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2318 (unsigned long long)dev
->n_sectors
,
2319 dev
->multi_count
, dev
->cylinders
,
2320 dev
->heads
, dev
->sectors
);
2327 /* ATAPI-specific feature tests */
2328 else if (dev
->class == ATA_DEV_ATAPI
) {
2329 const char *cdb_intr_string
= "";
2330 const char *atapi_an_string
= "";
2331 const char *dma_dir_string
= "";
2334 rc
= atapi_cdb_len(id
);
2335 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2336 if (ata_msg_warn(ap
))
2337 ata_dev_warn(dev
, "unsupported CDB len\n");
2341 dev
->cdb_len
= (unsigned int) rc
;
2343 /* Enable ATAPI AN if both the host and device have
2344 * the support. If PMP is attached, SNTF is required
2345 * to enable ATAPI AN to discern between PHY status
2346 * changed notifications and ATAPI ANs.
2349 (ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2350 (!sata_pmp_attached(ap
) ||
2351 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2352 unsigned int err_mask
;
2354 /* issue SET feature command to turn this on */
2355 err_mask
= ata_dev_set_feature(dev
,
2356 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2359 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2362 dev
->flags
|= ATA_DFLAG_AN
;
2363 atapi_an_string
= ", ATAPI AN";
2367 if (ata_id_cdb_intr(dev
->id
)) {
2368 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2369 cdb_intr_string
= ", CDB intr";
2372 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2373 dev
->flags
|= ATA_DFLAG_DMADIR
;
2374 dma_dir_string
= ", DMADIR";
2377 /* print device info to dmesg */
2378 if (ata_msg_drv(ap
) && print_info
)
2380 "ATAPI: %s, %s, max %s%s%s%s\n",
2382 ata_mode_string(xfer_mask
),
2383 cdb_intr_string
, atapi_an_string
,
2387 /* determine max_sectors */
2388 dev
->max_sectors
= ATA_MAX_SECTORS
;
2389 if (dev
->flags
& ATA_DFLAG_LBA48
)
2390 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2392 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2394 if (ata_dev_knobble(dev
)) {
2395 if (ata_msg_drv(ap
) && print_info
)
2396 ata_dev_info(dev
, "applying bridge limits\n");
2397 dev
->udma_mask
&= ATA_UDMA5
;
2398 dev
->max_sectors
= ATA_MAX_SECTORS
;
2401 if ((dev
->class == ATA_DEV_ATAPI
) &&
2402 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2403 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2404 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2407 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2408 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2411 if (ap
->ops
->dev_config
)
2412 ap
->ops
->dev_config(dev
);
2414 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2415 /* Let the user know. We don't want to disallow opens for
2416 rescue purposes, or in case the vendor is just a blithering
2417 idiot. Do this after the dev_config call as some controllers
2418 with buggy firmware may want to avoid reporting false device
2423 "Drive reports diagnostics failure. This may indicate a drive\n");
2425 "fault or invalid emulation. Contact drive vendor for information.\n");
2429 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2430 ata_dev_warn(dev
, "WARNING: device requires firmware update to be fully functional\n");
2431 ata_dev_warn(dev
, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2437 if (ata_msg_probe(ap
))
2438 ata_dev_dbg(dev
, "%s: EXIT, err\n", __func__
);
2443 * ata_cable_40wire - return 40 wire cable type
2446 * Helper method for drivers which want to hardwire 40 wire cable
2450 int ata_cable_40wire(struct ata_port
*ap
)
2452 return ATA_CBL_PATA40
;
2456 * ata_cable_80wire - return 80 wire cable type
2459 * Helper method for drivers which want to hardwire 80 wire cable
2463 int ata_cable_80wire(struct ata_port
*ap
)
2465 return ATA_CBL_PATA80
;
2469 * ata_cable_unknown - return unknown PATA cable.
2472 * Helper method for drivers which have no PATA cable detection.
2475 int ata_cable_unknown(struct ata_port
*ap
)
2477 return ATA_CBL_PATA_UNK
;
2481 * ata_cable_ignore - return ignored PATA cable.
2484 * Helper method for drivers which don't use cable type to limit
2487 int ata_cable_ignore(struct ata_port
*ap
)
2489 return ATA_CBL_PATA_IGN
;
2493 * ata_cable_sata - return SATA cable type
2496 * Helper method for drivers which have SATA cables
2499 int ata_cable_sata(struct ata_port
*ap
)
2501 return ATA_CBL_SATA
;
2505 * ata_bus_probe - Reset and probe ATA bus
2508 * Master ATA bus probing function. Initiates a hardware-dependent
2509 * bus reset, then attempts to identify any devices found on
2513 * PCI/etc. bus probe sem.
2516 * Zero on success, negative errno otherwise.
2519 int ata_bus_probe(struct ata_port
*ap
)
2521 unsigned int classes
[ATA_MAX_DEVICES
];
2522 int tries
[ATA_MAX_DEVICES
];
2524 struct ata_device
*dev
;
2526 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2527 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2530 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2531 /* If we issue an SRST then an ATA drive (not ATAPI)
2532 * may change configuration and be in PIO0 timing. If
2533 * we do a hard reset (or are coming from power on)
2534 * this is true for ATA or ATAPI. Until we've set a
2535 * suitable controller mode we should not touch the
2536 * bus as we may be talking too fast.
2538 dev
->pio_mode
= XFER_PIO_0
;
2540 /* If the controller has a pio mode setup function
2541 * then use it to set the chipset to rights. Don't
2542 * touch the DMA setup as that will be dealt with when
2543 * configuring devices.
2545 if (ap
->ops
->set_piomode
)
2546 ap
->ops
->set_piomode(ap
, dev
);
2549 /* reset and determine device classes */
2550 ap
->ops
->phy_reset(ap
);
2552 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2553 if (dev
->class != ATA_DEV_UNKNOWN
)
2554 classes
[dev
->devno
] = dev
->class;
2556 classes
[dev
->devno
] = ATA_DEV_NONE
;
2558 dev
->class = ATA_DEV_UNKNOWN
;
2561 /* read IDENTIFY page and configure devices. We have to do the identify
2562 specific sequence bass-ackwards so that PDIAG- is released by
2565 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2566 if (tries
[dev
->devno
])
2567 dev
->class = classes
[dev
->devno
];
2569 if (!ata_dev_enabled(dev
))
2572 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2578 /* Now ask for the cable type as PDIAG- should have been released */
2579 if (ap
->ops
->cable_detect
)
2580 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2582 /* We may have SATA bridge glue hiding here irrespective of
2583 * the reported cable types and sensed types. When SATA
2584 * drives indicate we have a bridge, we don't know which end
2585 * of the link the bridge is which is a problem.
2587 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2588 if (ata_id_is_sata(dev
->id
))
2589 ap
->cbl
= ATA_CBL_SATA
;
2591 /* After the identify sequence we can now set up the devices. We do
2592 this in the normal order so that the user doesn't get confused */
2594 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2595 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2596 rc
= ata_dev_configure(dev
);
2597 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2602 /* configure transfer mode */
2603 rc
= ata_set_mode(&ap
->link
, &dev
);
2607 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2613 tries
[dev
->devno
]--;
2617 /* eeek, something went very wrong, give up */
2618 tries
[dev
->devno
] = 0;
2622 /* give it just one more chance */
2623 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2625 if (tries
[dev
->devno
] == 1) {
2626 /* This is the last chance, better to slow
2627 * down than lose it.
2629 sata_down_spd_limit(&ap
->link
, 0);
2630 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2634 if (!tries
[dev
->devno
])
2635 ata_dev_disable(dev
);
2641 * sata_print_link_status - Print SATA link status
2642 * @link: SATA link to printk link status about
2644 * This function prints link speed and status of a SATA link.
2649 static void sata_print_link_status(struct ata_link
*link
)
2651 u32 sstatus
, scontrol
, tmp
;
2653 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2655 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2657 if (ata_phys_link_online(link
)) {
2658 tmp
= (sstatus
>> 4) & 0xf;
2659 ata_link_info(link
, "SATA link up %s (SStatus %X SControl %X)\n",
2660 sata_spd_string(tmp
), sstatus
, scontrol
);
2662 ata_link_info(link
, "SATA link down (SStatus %X SControl %X)\n",
2668 * ata_dev_pair - return other device on cable
2671 * Obtain the other device on the same cable, or if none is
2672 * present NULL is returned
2675 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2677 struct ata_link
*link
= adev
->link
;
2678 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2679 if (!ata_dev_enabled(pair
))
2685 * sata_down_spd_limit - adjust SATA spd limit downward
2686 * @link: Link to adjust SATA spd limit for
2687 * @spd_limit: Additional limit
2689 * Adjust SATA spd limit of @link downward. Note that this
2690 * function only adjusts the limit. The change must be applied
2691 * using sata_set_spd().
2693 * If @spd_limit is non-zero, the speed is limited to equal to or
2694 * lower than @spd_limit if such speed is supported. If
2695 * @spd_limit is slower than any supported speed, only the lowest
2696 * supported speed is allowed.
2699 * Inherited from caller.
2702 * 0 on success, negative errno on failure
2704 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
2706 u32 sstatus
, spd
, mask
;
2709 if (!sata_scr_valid(link
))
2712 /* If SCR can be read, use it to determine the current SPD.
2713 * If not, use cached value in link->sata_spd.
2715 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2716 if (rc
== 0 && ata_sstatus_online(sstatus
))
2717 spd
= (sstatus
>> 4) & 0xf;
2719 spd
= link
->sata_spd
;
2721 mask
= link
->sata_spd_limit
;
2725 /* unconditionally mask off the highest bit */
2726 bit
= fls(mask
) - 1;
2727 mask
&= ~(1 << bit
);
2729 /* Mask off all speeds higher than or equal to the current
2730 * one. Force 1.5Gbps if current SPD is not available.
2733 mask
&= (1 << (spd
- 1)) - 1;
2737 /* were we already at the bottom? */
2742 if (mask
& ((1 << spd_limit
) - 1))
2743 mask
&= (1 << spd_limit
) - 1;
2745 bit
= ffs(mask
) - 1;
2750 link
->sata_spd_limit
= mask
;
2752 ata_link_warn(link
, "limiting SATA link speed to %s\n",
2753 sata_spd_string(fls(mask
)));
2758 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2760 struct ata_link
*host_link
= &link
->ap
->link
;
2761 u32 limit
, target
, spd
;
2763 limit
= link
->sata_spd_limit
;
2765 /* Don't configure downstream link faster than upstream link.
2766 * It doesn't speed up anything and some PMPs choke on such
2769 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2770 limit
&= (1 << host_link
->sata_spd
) - 1;
2772 if (limit
== UINT_MAX
)
2775 target
= fls(limit
);
2777 spd
= (*scontrol
>> 4) & 0xf;
2778 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2780 return spd
!= target
;
2784 * sata_set_spd_needed - is SATA spd configuration needed
2785 * @link: Link in question
2787 * Test whether the spd limit in SControl matches
2788 * @link->sata_spd_limit. This function is used to determine
2789 * whether hardreset is necessary to apply SATA spd
2793 * Inherited from caller.
2796 * 1 if SATA spd configuration is needed, 0 otherwise.
2798 static int sata_set_spd_needed(struct ata_link
*link
)
2802 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2805 return __sata_set_spd_needed(link
, &scontrol
);
2809 * sata_set_spd - set SATA spd according to spd limit
2810 * @link: Link to set SATA spd for
2812 * Set SATA spd of @link according to sata_spd_limit.
2815 * Inherited from caller.
2818 * 0 if spd doesn't need to be changed, 1 if spd has been
2819 * changed. Negative errno if SCR registers are inaccessible.
2821 int sata_set_spd(struct ata_link
*link
)
2826 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2829 if (!__sata_set_spd_needed(link
, &scontrol
))
2832 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2839 * This mode timing computation functionality is ported over from
2840 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2843 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2844 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2845 * for UDMA6, which is currently supported only by Maxtor drives.
2847 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2850 static const struct ata_timing ata_timing
[] = {
2851 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2852 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2853 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2854 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2855 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2856 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2857 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2858 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2860 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2861 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2862 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2864 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2865 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2866 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2867 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2868 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2870 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2871 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2872 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2873 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2874 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2875 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2876 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2877 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2882 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2883 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2885 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2887 q
->setup
= EZ(t
->setup
* 1000, T
);
2888 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2889 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2890 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2891 q
->active
= EZ(t
->active
* 1000, T
);
2892 q
->recover
= EZ(t
->recover
* 1000, T
);
2893 q
->dmack_hold
= EZ(t
->dmack_hold
* 1000, T
);
2894 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2895 q
->udma
= EZ(t
->udma
* 1000, UT
);
2898 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2899 struct ata_timing
*m
, unsigned int what
)
2901 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2902 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2903 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2904 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2905 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2906 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2907 if (what
& ATA_TIMING_DMACK_HOLD
) m
->dmack_hold
= max(a
->dmack_hold
, b
->dmack_hold
);
2908 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2909 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2912 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2914 const struct ata_timing
*t
= ata_timing
;
2916 while (xfer_mode
> t
->mode
)
2919 if (xfer_mode
== t
->mode
)
2924 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2925 struct ata_timing
*t
, int T
, int UT
)
2927 const u16
*id
= adev
->id
;
2928 const struct ata_timing
*s
;
2929 struct ata_timing p
;
2935 if (!(s
= ata_timing_find_mode(speed
)))
2938 memcpy(t
, s
, sizeof(*s
));
2941 * If the drive is an EIDE drive, it can tell us it needs extended
2942 * PIO/MW_DMA cycle timing.
2945 if (id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2946 memset(&p
, 0, sizeof(p
));
2948 if (speed
>= XFER_PIO_0
&& speed
< XFER_SW_DMA_0
) {
2949 if (speed
<= XFER_PIO_2
)
2950 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO
];
2951 else if ((speed
<= XFER_PIO_4
) ||
2952 (speed
== XFER_PIO_5
&& !ata_id_is_cfa(id
)))
2953 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO_IORDY
];
2954 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
)
2955 p
.cycle
= id
[ATA_ID_EIDE_DMA_MIN
];
2957 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2961 * Convert the timing to bus clock counts.
2964 ata_timing_quantize(t
, t
, T
, UT
);
2967 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2968 * S.M.A.R.T * and some other commands. We have to ensure that the
2969 * DMA cycle timing is slower/equal than the fastest PIO timing.
2972 if (speed
> XFER_PIO_6
) {
2973 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2974 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2978 * Lengthen active & recovery time so that cycle time is correct.
2981 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2982 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2983 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2986 if (t
->active
+ t
->recover
< t
->cycle
) {
2987 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2988 t
->recover
= t
->cycle
- t
->active
;
2991 /* In a few cases quantisation may produce enough errors to
2992 leave t->cycle too low for the sum of active and recovery
2993 if so we must correct this */
2994 if (t
->active
+ t
->recover
> t
->cycle
)
2995 t
->cycle
= t
->active
+ t
->recover
;
3001 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3002 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3003 * @cycle: cycle duration in ns
3005 * Return matching xfer mode for @cycle. The returned mode is of
3006 * the transfer type specified by @xfer_shift. If @cycle is too
3007 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3008 * than the fastest known mode, the fasted mode is returned.
3014 * Matching xfer_mode, 0xff if no match found.
3016 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3018 u8 base_mode
= 0xff, last_mode
= 0xff;
3019 const struct ata_xfer_ent
*ent
;
3020 const struct ata_timing
*t
;
3022 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3023 if (ent
->shift
== xfer_shift
)
3024 base_mode
= ent
->base
;
3026 for (t
= ata_timing_find_mode(base_mode
);
3027 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3028 unsigned short this_cycle
;
3030 switch (xfer_shift
) {
3032 case ATA_SHIFT_MWDMA
:
3033 this_cycle
= t
->cycle
;
3035 case ATA_SHIFT_UDMA
:
3036 this_cycle
= t
->udma
;
3042 if (cycle
> this_cycle
)
3045 last_mode
= t
->mode
;
3052 * ata_down_xfermask_limit - adjust dev xfer masks downward
3053 * @dev: Device to adjust xfer masks
3054 * @sel: ATA_DNXFER_* selector
3056 * Adjust xfer masks of @dev downward. Note that this function
3057 * does not apply the change. Invoking ata_set_mode() afterwards
3058 * will apply the limit.
3061 * Inherited from caller.
3064 * 0 on success, negative errno on failure
3066 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3069 unsigned long orig_mask
, xfer_mask
;
3070 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3073 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3074 sel
&= ~ATA_DNXFER_QUIET
;
3076 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3079 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3082 case ATA_DNXFER_PIO
:
3083 highbit
= fls(pio_mask
) - 1;
3084 pio_mask
&= ~(1 << highbit
);
3087 case ATA_DNXFER_DMA
:
3089 highbit
= fls(udma_mask
) - 1;
3090 udma_mask
&= ~(1 << highbit
);
3093 } else if (mwdma_mask
) {
3094 highbit
= fls(mwdma_mask
) - 1;
3095 mwdma_mask
&= ~(1 << highbit
);
3101 case ATA_DNXFER_40C
:
3102 udma_mask
&= ATA_UDMA_MASK_40C
;
3105 case ATA_DNXFER_FORCE_PIO0
:
3107 case ATA_DNXFER_FORCE_PIO
:
3116 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3118 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3122 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3123 snprintf(buf
, sizeof(buf
), "%s:%s",
3124 ata_mode_string(xfer_mask
),
3125 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3127 snprintf(buf
, sizeof(buf
), "%s",
3128 ata_mode_string(xfer_mask
));
3130 ata_dev_warn(dev
, "limiting speed to %s\n", buf
);
3133 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3139 static int ata_dev_set_mode(struct ata_device
*dev
)
3141 struct ata_port
*ap
= dev
->link
->ap
;
3142 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3143 const bool nosetxfer
= dev
->horkage
& ATA_HORKAGE_NOSETXFER
;
3144 const char *dev_err_whine
= "";
3145 int ign_dev_err
= 0;
3146 unsigned int err_mask
= 0;
3149 dev
->flags
&= ~ATA_DFLAG_PIO
;
3150 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3151 dev
->flags
|= ATA_DFLAG_PIO
;
3153 if (nosetxfer
&& ap
->flags
& ATA_FLAG_SATA
&& ata_id_is_sata(dev
->id
))
3154 dev_err_whine
= " (SET_XFERMODE skipped)";
3158 "NOSETXFER but PATA detected - can't "
3159 "skip SETXFER, might malfunction\n");
3160 err_mask
= ata_dev_set_xfermode(dev
);
3163 if (err_mask
& ~AC_ERR_DEV
)
3167 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3168 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3169 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3173 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3174 /* Old CFA may refuse this command, which is just fine */
3175 if (ata_id_is_cfa(dev
->id
))
3177 /* Catch several broken garbage emulations plus some pre
3179 if (ata_id_major_version(dev
->id
) == 0 &&
3180 dev
->pio_mode
<= XFER_PIO_2
)
3182 /* Some very old devices and some bad newer ones fail
3183 any kind of SET_XFERMODE request but support PIO0-2
3184 timings and no IORDY */
3185 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3188 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3189 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3190 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3191 dev
->dma_mode
== XFER_MW_DMA_0
&&
3192 (dev
->id
[63] >> 8) & 1)
3195 /* if the device is actually configured correctly, ignore dev err */
3196 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3199 if (err_mask
& AC_ERR_DEV
) {
3203 dev_err_whine
= " (device error ignored)";
3206 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3207 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3209 ata_dev_info(dev
, "configured for %s%s\n",
3210 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3216 ata_dev_err(dev
, "failed to set xfermode (err_mask=0x%x)\n", err_mask
);
3221 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3222 * @link: link on which timings will be programmed
3223 * @r_failed_dev: out parameter for failed device
3225 * Standard implementation of the function used to tune and set
3226 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3227 * ata_dev_set_mode() fails, pointer to the failing device is
3228 * returned in @r_failed_dev.
3231 * PCI/etc. bus probe sem.
3234 * 0 on success, negative errno otherwise
3237 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3239 struct ata_port
*ap
= link
->ap
;
3240 struct ata_device
*dev
;
3241 int rc
= 0, used_dma
= 0, found
= 0;
3243 /* step 1: calculate xfer_mask */
3244 ata_for_each_dev(dev
, link
, ENABLED
) {
3245 unsigned long pio_mask
, dma_mask
;
3246 unsigned int mode_mask
;
3248 mode_mask
= ATA_DMA_MASK_ATA
;
3249 if (dev
->class == ATA_DEV_ATAPI
)
3250 mode_mask
= ATA_DMA_MASK_ATAPI
;
3251 else if (ata_id_is_cfa(dev
->id
))
3252 mode_mask
= ATA_DMA_MASK_CFA
;
3254 ata_dev_xfermask(dev
);
3255 ata_force_xfermask(dev
);
3257 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3259 if (libata_dma_mask
& mode_mask
)
3260 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
,
3265 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3266 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3269 if (ata_dma_enabled(dev
))
3275 /* step 2: always set host PIO timings */
3276 ata_for_each_dev(dev
, link
, ENABLED
) {
3277 if (dev
->pio_mode
== 0xff) {
3278 ata_dev_warn(dev
, "no PIO support\n");
3283 dev
->xfer_mode
= dev
->pio_mode
;
3284 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3285 if (ap
->ops
->set_piomode
)
3286 ap
->ops
->set_piomode(ap
, dev
);
3289 /* step 3: set host DMA timings */
3290 ata_for_each_dev(dev
, link
, ENABLED
) {
3291 if (!ata_dma_enabled(dev
))
3294 dev
->xfer_mode
= dev
->dma_mode
;
3295 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3296 if (ap
->ops
->set_dmamode
)
3297 ap
->ops
->set_dmamode(ap
, dev
);
3300 /* step 4: update devices' xfer mode */
3301 ata_for_each_dev(dev
, link
, ENABLED
) {
3302 rc
= ata_dev_set_mode(dev
);
3307 /* Record simplex status. If we selected DMA then the other
3308 * host channels are not permitted to do so.
3310 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3311 ap
->host
->simplex_claimed
= ap
;
3315 *r_failed_dev
= dev
;
3320 * ata_wait_ready - wait for link to become ready
3321 * @link: link to be waited on
3322 * @deadline: deadline jiffies for the operation
3323 * @check_ready: callback to check link readiness
3325 * Wait for @link to become ready. @check_ready should return
3326 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3327 * link doesn't seem to be occupied, other errno for other error
3330 * Transient -ENODEV conditions are allowed for
3331 * ATA_TMOUT_FF_WAIT.
3337 * 0 if @linke is ready before @deadline; otherwise, -errno.
3339 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3340 int (*check_ready
)(struct ata_link
*link
))
3342 unsigned long start
= jiffies
;
3343 unsigned long nodev_deadline
;
3346 /* choose which 0xff timeout to use, read comment in libata.h */
3347 if (link
->ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
)
3348 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT_LONG
);
3350 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3352 /* Slave readiness can't be tested separately from master. On
3353 * M/S emulation configuration, this function should be called
3354 * only on the master and it will handle both master and slave.
3356 WARN_ON(link
== link
->ap
->slave_link
);
3358 if (time_after(nodev_deadline
, deadline
))
3359 nodev_deadline
= deadline
;
3362 unsigned long now
= jiffies
;
3365 ready
= tmp
= check_ready(link
);
3370 * -ENODEV could be transient. Ignore -ENODEV if link
3371 * is online. Also, some SATA devices take a long
3372 * time to clear 0xff after reset. Wait for
3373 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3376 * Note that some PATA controllers (pata_ali) explode
3377 * if status register is read more than once when
3378 * there's no device attached.
3380 if (ready
== -ENODEV
) {
3381 if (ata_link_online(link
))
3383 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3384 !ata_link_offline(link
) &&
3385 time_before(now
, nodev_deadline
))
3391 if (time_after(now
, deadline
))
3394 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3395 (deadline
- now
> 3 * HZ
)) {
3397 "link is slow to respond, please be patient "
3398 "(ready=%d)\n", tmp
);
3402 ata_msleep(link
->ap
, 50);
3407 * ata_wait_after_reset - wait for link to become ready after reset
3408 * @link: link to be waited on
3409 * @deadline: deadline jiffies for the operation
3410 * @check_ready: callback to check link readiness
3412 * Wait for @link to become ready after reset.
3418 * 0 if @linke is ready before @deadline; otherwise, -errno.
3420 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3421 int (*check_ready
)(struct ata_link
*link
))
3423 ata_msleep(link
->ap
, ATA_WAIT_AFTER_RESET
);
3425 return ata_wait_ready(link
, deadline
, check_ready
);
3429 * sata_link_debounce - debounce SATA phy status
3430 * @link: ATA link to debounce SATA phy status for
3431 * @params: timing parameters { interval, duratinon, timeout } in msec
3432 * @deadline: deadline jiffies for the operation
3434 * Make sure SStatus of @link reaches stable state, determined by
3435 * holding the same value where DET is not 1 for @duration polled
3436 * every @interval, before @timeout. Timeout constraints the
3437 * beginning of the stable state. Because DET gets stuck at 1 on
3438 * some controllers after hot unplugging, this functions waits
3439 * until timeout then returns 0 if DET is stable at 1.
3441 * @timeout is further limited by @deadline. The sooner of the
3445 * Kernel thread context (may sleep)
3448 * 0 on success, -errno on failure.
3450 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3451 unsigned long deadline
)
3453 unsigned long interval
= params
[0];
3454 unsigned long duration
= params
[1];
3455 unsigned long last_jiffies
, t
;
3459 t
= ata_deadline(jiffies
, params
[2]);
3460 if (time_before(t
, deadline
))
3463 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3468 last_jiffies
= jiffies
;
3471 ata_msleep(link
->ap
, interval
);
3472 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3478 if (cur
== 1 && time_before(jiffies
, deadline
))
3480 if (time_after(jiffies
,
3481 ata_deadline(last_jiffies
, duration
)))
3486 /* unstable, start over */
3488 last_jiffies
= jiffies
;
3490 /* Check deadline. If debouncing failed, return
3491 * -EPIPE to tell upper layer to lower link speed.
3493 if (time_after(jiffies
, deadline
))
3499 * sata_link_resume - resume SATA link
3500 * @link: ATA link to resume SATA
3501 * @params: timing parameters { interval, duratinon, timeout } in msec
3502 * @deadline: deadline jiffies for the operation
3504 * Resume SATA phy @link and debounce it.
3507 * Kernel thread context (may sleep)
3510 * 0 on success, -errno on failure.
3512 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3513 unsigned long deadline
)
3515 int tries
= ATA_LINK_RESUME_TRIES
;
3516 u32 scontrol
, serror
;
3519 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3523 * Writes to SControl sometimes get ignored under certain
3524 * controllers (ata_piix SIDPR). Make sure DET actually is
3528 scontrol
= (scontrol
& 0x0f0) | 0x300;
3529 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3532 * Some PHYs react badly if SStatus is pounded
3533 * immediately after resuming. Delay 200ms before
3536 ata_msleep(link
->ap
, 200);
3538 /* is SControl restored correctly? */
3539 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3541 } while ((scontrol
& 0xf0f) != 0x300 && --tries
);
3543 if ((scontrol
& 0xf0f) != 0x300) {
3544 ata_link_warn(link
, "failed to resume link (SControl %X)\n",
3549 if (tries
< ATA_LINK_RESUME_TRIES
)
3550 ata_link_warn(link
, "link resume succeeded after %d retries\n",
3551 ATA_LINK_RESUME_TRIES
- tries
);
3553 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3556 /* clear SError, some PHYs require this even for SRST to work */
3557 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3558 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3560 return rc
!= -EINVAL
? rc
: 0;
3564 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3565 * @link: ATA link to manipulate SControl for
3566 * @policy: LPM policy to configure
3567 * @spm_wakeup: initiate LPM transition to active state
3569 * Manipulate the IPM field of the SControl register of @link
3570 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3571 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3572 * the link. This function also clears PHYRDY_CHG before
3579 * 0 on succes, -errno otherwise.
3581 int sata_link_scr_lpm(struct ata_link
*link
, enum ata_lpm_policy policy
,
3584 struct ata_eh_context
*ehc
= &link
->eh_context
;
3585 bool woken_up
= false;
3589 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
3594 case ATA_LPM_MAX_POWER
:
3595 /* disable all LPM transitions */
3596 scontrol
|= (0x3 << 8);
3597 /* initiate transition to active state */
3599 scontrol
|= (0x4 << 12);
3603 case ATA_LPM_MED_POWER
:
3604 /* allow LPM to PARTIAL */
3605 scontrol
&= ~(0x1 << 8);
3606 scontrol
|= (0x2 << 8);
3608 case ATA_LPM_MIN_POWER
:
3609 if (ata_link_nr_enabled(link
) > 0)
3610 /* no restrictions on LPM transitions */
3611 scontrol
&= ~(0x3 << 8);
3613 /* empty port, power off */
3615 scontrol
|= (0x1 << 2);
3622 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
3626 /* give the link time to transit out of LPM state */
3630 /* clear PHYRDY_CHG from SError */
3631 ehc
->i
.serror
&= ~SERR_PHYRDY_CHG
;
3632 return sata_scr_write(link
, SCR_ERROR
, SERR_PHYRDY_CHG
);
3636 * ata_std_prereset - prepare for reset
3637 * @link: ATA link to be reset
3638 * @deadline: deadline jiffies for the operation
3640 * @link is about to be reset. Initialize it. Failure from
3641 * prereset makes libata abort whole reset sequence and give up
3642 * that port, so prereset should be best-effort. It does its
3643 * best to prepare for reset sequence but if things go wrong, it
3644 * should just whine, not fail.
3647 * Kernel thread context (may sleep)
3650 * 0 on success, -errno otherwise.
3652 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3654 struct ata_port
*ap
= link
->ap
;
3655 struct ata_eh_context
*ehc
= &link
->eh_context
;
3656 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3659 /* if we're about to do hardreset, nothing more to do */
3660 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3663 /* if SATA, resume link */
3664 if (ap
->flags
& ATA_FLAG_SATA
) {
3665 rc
= sata_link_resume(link
, timing
, deadline
);
3666 /* whine about phy resume failure but proceed */
3667 if (rc
&& rc
!= -EOPNOTSUPP
)
3669 "failed to resume link for reset (errno=%d)\n",
3673 /* no point in trying softreset on offline link */
3674 if (ata_phys_link_offline(link
))
3675 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3681 * sata_link_hardreset - reset link via SATA phy reset
3682 * @link: link to reset
3683 * @timing: timing parameters { interval, duratinon, timeout } in msec
3684 * @deadline: deadline jiffies for the operation
3685 * @online: optional out parameter indicating link onlineness
3686 * @check_ready: optional callback to check link readiness
3688 * SATA phy-reset @link using DET bits of SControl register.
3689 * After hardreset, link readiness is waited upon using
3690 * ata_wait_ready() if @check_ready is specified. LLDs are
3691 * allowed to not specify @check_ready and wait itself after this
3692 * function returns. Device classification is LLD's
3695 * *@online is set to one iff reset succeeded and @link is online
3699 * Kernel thread context (may sleep)
3702 * 0 on success, -errno otherwise.
3704 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3705 unsigned long deadline
,
3706 bool *online
, int (*check_ready
)(struct ata_link
*))
3716 if (sata_set_spd_needed(link
)) {
3717 /* SATA spec says nothing about how to reconfigure
3718 * spd. To be on the safe side, turn off phy during
3719 * reconfiguration. This works for at least ICH7 AHCI
3722 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3725 scontrol
= (scontrol
& 0x0f0) | 0x304;
3727 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3733 /* issue phy wake/reset */
3734 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3737 scontrol
= (scontrol
& 0x0f0) | 0x301;
3739 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3742 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3743 * 10.4.2 says at least 1 ms.
3745 ata_msleep(link
->ap
, 1);
3747 /* bring link back */
3748 rc
= sata_link_resume(link
, timing
, deadline
);
3751 /* if link is offline nothing more to do */
3752 if (ata_phys_link_offline(link
))
3755 /* Link is online. From this point, -ENODEV too is an error. */
3759 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3760 /* If PMP is supported, we have to do follow-up SRST.
3761 * Some PMPs don't send D2H Reg FIS after hardreset if
3762 * the first port is empty. Wait only for
3763 * ATA_TMOUT_PMP_SRST_WAIT.
3766 unsigned long pmp_deadline
;
3768 pmp_deadline
= ata_deadline(jiffies
,
3769 ATA_TMOUT_PMP_SRST_WAIT
);
3770 if (time_after(pmp_deadline
, deadline
))
3771 pmp_deadline
= deadline
;
3772 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3780 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3782 if (rc
&& rc
!= -EAGAIN
) {
3783 /* online is set iff link is online && reset succeeded */
3786 ata_link_err(link
, "COMRESET failed (errno=%d)\n", rc
);
3788 DPRINTK("EXIT, rc=%d\n", rc
);
3793 * sata_std_hardreset - COMRESET w/o waiting or classification
3794 * @link: link to reset
3795 * @class: resulting class of attached device
3796 * @deadline: deadline jiffies for the operation
3798 * Standard SATA COMRESET w/o waiting or classification.
3801 * Kernel thread context (may sleep)
3804 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3806 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3807 unsigned long deadline
)
3809 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3814 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3815 return online
? -EAGAIN
: rc
;
3819 * ata_std_postreset - standard postreset callback
3820 * @link: the target ata_link
3821 * @classes: classes of attached devices
3823 * This function is invoked after a successful reset. Note that
3824 * the device might have been reset more than once using
3825 * different reset methods before postreset is invoked.
3828 * Kernel thread context (may sleep)
3830 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3836 /* reset complete, clear SError */
3837 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3838 sata_scr_write(link
, SCR_ERROR
, serror
);
3840 /* print link status */
3841 sata_print_link_status(link
);
3847 * ata_dev_same_device - Determine whether new ID matches configured device
3848 * @dev: device to compare against
3849 * @new_class: class of the new device
3850 * @new_id: IDENTIFY page of the new device
3852 * Compare @new_class and @new_id against @dev and determine
3853 * whether @dev is the device indicated by @new_class and
3860 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3862 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3865 const u16
*old_id
= dev
->id
;
3866 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3867 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3869 if (dev
->class != new_class
) {
3870 ata_dev_info(dev
, "class mismatch %d != %d\n",
3871 dev
->class, new_class
);
3875 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3876 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3877 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3878 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3880 if (strcmp(model
[0], model
[1])) {
3881 ata_dev_info(dev
, "model number mismatch '%s' != '%s'\n",
3882 model
[0], model
[1]);
3886 if (strcmp(serial
[0], serial
[1])) {
3887 ata_dev_info(dev
, "serial number mismatch '%s' != '%s'\n",
3888 serial
[0], serial
[1]);
3896 * ata_dev_reread_id - Re-read IDENTIFY data
3897 * @dev: target ATA device
3898 * @readid_flags: read ID flags
3900 * Re-read IDENTIFY page and make sure @dev is still attached to
3904 * Kernel thread context (may sleep)
3907 * 0 on success, negative errno otherwise
3909 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3911 unsigned int class = dev
->class;
3912 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3916 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3920 /* is the device still there? */
3921 if (!ata_dev_same_device(dev
, class, id
))
3924 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3929 * ata_dev_revalidate - Revalidate ATA device
3930 * @dev: device to revalidate
3931 * @new_class: new class code
3932 * @readid_flags: read ID flags
3934 * Re-read IDENTIFY page, make sure @dev is still attached to the
3935 * port and reconfigure it according to the new IDENTIFY page.
3938 * Kernel thread context (may sleep)
3941 * 0 on success, negative errno otherwise
3943 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3944 unsigned int readid_flags
)
3946 u64 n_sectors
= dev
->n_sectors
;
3947 u64 n_native_sectors
= dev
->n_native_sectors
;
3950 if (!ata_dev_enabled(dev
))
3953 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3954 if (ata_class_enabled(new_class
) &&
3955 new_class
!= ATA_DEV_ATA
&&
3956 new_class
!= ATA_DEV_ATAPI
&&
3957 new_class
!= ATA_DEV_SEMB
) {
3958 ata_dev_info(dev
, "class mismatch %u != %u\n",
3959 dev
->class, new_class
);
3965 rc
= ata_dev_reread_id(dev
, readid_flags
);
3969 /* configure device according to the new ID */
3970 rc
= ata_dev_configure(dev
);
3974 /* verify n_sectors hasn't changed */
3975 if (dev
->class != ATA_DEV_ATA
|| !n_sectors
||
3976 dev
->n_sectors
== n_sectors
)
3979 /* n_sectors has changed */
3980 ata_dev_warn(dev
, "n_sectors mismatch %llu != %llu\n",
3981 (unsigned long long)n_sectors
,
3982 (unsigned long long)dev
->n_sectors
);
3985 * Something could have caused HPA to be unlocked
3986 * involuntarily. If n_native_sectors hasn't changed and the
3987 * new size matches it, keep the device.
3989 if (dev
->n_native_sectors
== n_native_sectors
&&
3990 dev
->n_sectors
> n_sectors
&& dev
->n_sectors
== n_native_sectors
) {
3992 "new n_sectors matches native, probably "
3993 "late HPA unlock, n_sectors updated\n");
3994 /* use the larger n_sectors */
3999 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4000 * unlocking HPA in those cases.
4002 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4004 if (dev
->n_native_sectors
== n_native_sectors
&&
4005 dev
->n_sectors
< n_sectors
&& n_sectors
== n_native_sectors
&&
4006 !(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
)) {
4008 "old n_sectors matches native, probably "
4009 "late HPA lock, will try to unlock HPA\n");
4010 /* try unlocking HPA */
4011 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
4016 /* restore original n_[native_]sectors and fail */
4017 dev
->n_native_sectors
= n_native_sectors
;
4018 dev
->n_sectors
= n_sectors
;
4020 ata_dev_err(dev
, "revalidation failed (errno=%d)\n", rc
);
4024 struct ata_blacklist_entry
{
4025 const char *model_num
;
4026 const char *model_rev
;
4027 unsigned long horkage
;
4030 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4031 /* Devices with DMA related problems under Linux */
4032 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4033 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4034 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4035 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4036 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4037 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4038 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4039 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4040 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4041 { "CRD-848[02]B", NULL
, ATA_HORKAGE_NODMA
},
4042 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4043 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4044 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4045 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4046 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4047 { "HITACHI CDR-8[34]35",NULL
, ATA_HORKAGE_NODMA
},
4048 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4049 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4050 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4051 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4052 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4053 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4054 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4055 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4056 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4057 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4058 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4059 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4060 { "2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA
},
4061 /* Odd clown on sil3726/4726 PMPs */
4062 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
4064 /* Weird ATAPI devices */
4065 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4066 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
4068 /* Devices we expect to fail diagnostics */
4070 /* Devices where NCQ should be avoided */
4072 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4073 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4074 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4075 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4077 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4078 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4079 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4080 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4081 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
4083 /* Seagate NCQ + FLUSH CACHE firmware bug */
4084 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4085 ATA_HORKAGE_FIRMWARE_WARN
},
4087 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4088 ATA_HORKAGE_FIRMWARE_WARN
},
4090 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4091 ATA_HORKAGE_FIRMWARE_WARN
},
4093 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4094 ATA_HORKAGE_FIRMWARE_WARN
},
4096 /* Blacklist entries taken from Silicon Image 3124/3132
4097 Windows driver .inf file - also several Linux problem reports */
4098 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4099 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4100 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4102 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4103 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ
, },
4105 /* devices which puke on READ_NATIVE_MAX */
4106 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4107 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4108 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4109 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4111 /* this one allows HPA unlocking but fails IOs on the area */
4112 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA
},
4114 /* Devices which report 1 sector over size HPA */
4115 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4116 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4117 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4119 /* Devices which get the IVB wrong */
4120 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4121 /* Maybe we should just blacklist TSSTcorp... */
4122 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB
, },
4124 /* Devices that do not need bridging limits applied */
4125 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4127 /* Devices which aren't very happy with higher link speeds */
4128 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4131 * Devices which choke on SETXFER. Applies only if both the
4132 * device and controller are SATA.
4134 { "PIONEER DVD-RW DVRTD08", NULL
, ATA_HORKAGE_NOSETXFER
},
4135 { "PIONEER DVD-RW DVRTD08A", NULL
, ATA_HORKAGE_NOSETXFER
},
4136 { "PIONEER DVD-RW DVR-215", NULL
, ATA_HORKAGE_NOSETXFER
},
4137 { "PIONEER DVD-RW DVR-212D", NULL
, ATA_HORKAGE_NOSETXFER
},
4138 { "PIONEER DVD-RW DVR-216D", NULL
, ATA_HORKAGE_NOSETXFER
},
4145 * glob_match - match a text string against a glob-style pattern
4146 * @text: the string to be examined
4147 * @pattern: the glob-style pattern to be matched against
4149 * Either/both of text and pattern can be empty strings.
4151 * Match text against a glob-style pattern, with wildcards and simple sets:
4153 * ? matches any single character.
4154 * * matches any run of characters.
4155 * [xyz] matches a single character from the set: x, y, or z.
4156 * [a-d] matches a single character from the range: a, b, c, or d.
4157 * [a-d0-9] matches a single character from either range.
4159 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4160 * Behaviour with malformed patterns is undefined, though generally reasonable.
4162 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4164 * This function uses one level of recursion per '*' in pattern.
4165 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4166 * this will not cause stack problems for any reasonable use here.
4169 * 0 on match, 1 otherwise.
4171 static int glob_match (const char *text
, const char *pattern
)
4174 /* Match single character or a '?' wildcard */
4175 if (*text
== *pattern
|| *pattern
== '?') {
4177 return 0; /* End of both strings: match */
4179 /* Match single char against a '[' bracketed ']' pattern set */
4180 if (!*text
|| *pattern
!= '[')
4181 break; /* Not a pattern set */
4182 while (*++pattern
&& *pattern
!= ']' && *text
!= *pattern
) {
4183 if (*pattern
== '-' && *(pattern
- 1) != '[')
4184 if (*text
> *(pattern
- 1) && *text
< *(pattern
+ 1)) {
4189 if (!*pattern
|| *pattern
== ']')
4190 return 1; /* No match */
4191 while (*pattern
&& *pattern
++ != ']');
4193 } while (*++text
&& *pattern
);
4195 /* Match any run of chars against a '*' wildcard */
4196 if (*pattern
== '*') {
4198 return 0; /* Match: avoid recursion at end of pattern */
4199 /* Loop to handle additional pattern chars after the wildcard */
4201 if (glob_match(text
, pattern
) == 0)
4202 return 0; /* Remainder matched */
4203 ++text
; /* Absorb (match) this char and try again */
4206 if (!*text
&& !*pattern
)
4207 return 0; /* End of both strings: match */
4208 return 1; /* No match */
4211 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4213 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4214 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4215 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4217 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4218 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4220 while (ad
->model_num
) {
4221 if (!glob_match(model_num
, ad
->model_num
)) {
4222 if (ad
->model_rev
== NULL
)
4224 if (!glob_match(model_rev
, ad
->model_rev
))
4232 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4234 /* We don't support polling DMA.
4235 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4236 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4238 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4239 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4241 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4245 * ata_is_40wire - check drive side detection
4248 * Perform drive side detection decoding, allowing for device vendors
4249 * who can't follow the documentation.
4252 static int ata_is_40wire(struct ata_device
*dev
)
4254 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4255 return ata_drive_40wire_relaxed(dev
->id
);
4256 return ata_drive_40wire(dev
->id
);
4260 * cable_is_40wire - 40/80/SATA decider
4261 * @ap: port to consider
4263 * This function encapsulates the policy for speed management
4264 * in one place. At the moment we don't cache the result but
4265 * there is a good case for setting ap->cbl to the result when
4266 * we are called with unknown cables (and figuring out if it
4267 * impacts hotplug at all).
4269 * Return 1 if the cable appears to be 40 wire.
4272 static int cable_is_40wire(struct ata_port
*ap
)
4274 struct ata_link
*link
;
4275 struct ata_device
*dev
;
4277 /* If the controller thinks we are 40 wire, we are. */
4278 if (ap
->cbl
== ATA_CBL_PATA40
)
4281 /* If the controller thinks we are 80 wire, we are. */
4282 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4285 /* If the system is known to be 40 wire short cable (eg
4286 * laptop), then we allow 80 wire modes even if the drive
4289 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4292 /* If the controller doesn't know, we scan.
4294 * Note: We look for all 40 wire detects at this point. Any
4295 * 80 wire detect is taken to be 80 wire cable because
4296 * - in many setups only the one drive (slave if present) will
4297 * give a valid detect
4298 * - if you have a non detect capable drive you don't want it
4299 * to colour the choice
4301 ata_for_each_link(link
, ap
, EDGE
) {
4302 ata_for_each_dev(dev
, link
, ENABLED
) {
4303 if (!ata_is_40wire(dev
))
4311 * ata_dev_xfermask - Compute supported xfermask of the given device
4312 * @dev: Device to compute xfermask for
4314 * Compute supported xfermask of @dev and store it in
4315 * dev->*_mask. This function is responsible for applying all
4316 * known limits including host controller limits, device
4322 static void ata_dev_xfermask(struct ata_device
*dev
)
4324 struct ata_link
*link
= dev
->link
;
4325 struct ata_port
*ap
= link
->ap
;
4326 struct ata_host
*host
= ap
->host
;
4327 unsigned long xfer_mask
;
4329 /* controller modes available */
4330 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4331 ap
->mwdma_mask
, ap
->udma_mask
);
4333 /* drive modes available */
4334 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4335 dev
->mwdma_mask
, dev
->udma_mask
);
4336 xfer_mask
&= ata_id_xfermask(dev
->id
);
4339 * CFA Advanced TrueIDE timings are not allowed on a shared
4342 if (ata_dev_pair(dev
)) {
4343 /* No PIO5 or PIO6 */
4344 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4345 /* No MWDMA3 or MWDMA 4 */
4346 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4349 if (ata_dma_blacklisted(dev
)) {
4350 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4352 "device is on DMA blacklist, disabling DMA\n");
4355 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4356 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4357 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4359 "simplex DMA is claimed by other device, disabling DMA\n");
4362 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4363 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4365 if (ap
->ops
->mode_filter
)
4366 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4368 /* Apply cable rule here. Don't apply it early because when
4369 * we handle hot plug the cable type can itself change.
4370 * Check this last so that we know if the transfer rate was
4371 * solely limited by the cable.
4372 * Unknown or 80 wire cables reported host side are checked
4373 * drive side as well. Cases where we know a 40wire cable
4374 * is used safely for 80 are not checked here.
4376 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4377 /* UDMA/44 or higher would be available */
4378 if (cable_is_40wire(ap
)) {
4380 "limited to UDMA/33 due to 40-wire cable\n");
4381 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4384 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4385 &dev
->mwdma_mask
, &dev
->udma_mask
);
4389 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4390 * @dev: Device to which command will be sent
4392 * Issue SET FEATURES - XFER MODE command to device @dev
4396 * PCI/etc. bus probe sem.
4399 * 0 on success, AC_ERR_* mask otherwise.
4402 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4404 struct ata_taskfile tf
;
4405 unsigned int err_mask
;
4407 /* set up set-features taskfile */
4408 DPRINTK("set features - xfer mode\n");
4410 /* Some controllers and ATAPI devices show flaky interrupt
4411 * behavior after setting xfer mode. Use polling instead.
4413 ata_tf_init(dev
, &tf
);
4414 tf
.command
= ATA_CMD_SET_FEATURES
;
4415 tf
.feature
= SETFEATURES_XFER
;
4416 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4417 tf
.protocol
= ATA_PROT_NODATA
;
4418 /* If we are using IORDY we must send the mode setting command */
4419 if (ata_pio_need_iordy(dev
))
4420 tf
.nsect
= dev
->xfer_mode
;
4421 /* If the device has IORDY and the controller does not - turn it off */
4422 else if (ata_id_has_iordy(dev
->id
))
4424 else /* In the ancient relic department - skip all of this */
4427 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4429 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4434 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4435 * @dev: Device to which command will be sent
4436 * @enable: Whether to enable or disable the feature
4437 * @feature: The sector count represents the feature to set
4439 * Issue SET FEATURES - SATA FEATURES command to device @dev
4440 * on port @ap with sector count
4443 * PCI/etc. bus probe sem.
4446 * 0 on success, AC_ERR_* mask otherwise.
4448 unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
, u8 feature
)
4450 struct ata_taskfile tf
;
4451 unsigned int err_mask
;
4453 /* set up set-features taskfile */
4454 DPRINTK("set features - SATA features\n");
4456 ata_tf_init(dev
, &tf
);
4457 tf
.command
= ATA_CMD_SET_FEATURES
;
4458 tf
.feature
= enable
;
4459 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4460 tf
.protocol
= ATA_PROT_NODATA
;
4463 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4465 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4470 * ata_dev_init_params - Issue INIT DEV PARAMS command
4471 * @dev: Device to which command will be sent
4472 * @heads: Number of heads (taskfile parameter)
4473 * @sectors: Number of sectors (taskfile parameter)
4476 * Kernel thread context (may sleep)
4479 * 0 on success, AC_ERR_* mask otherwise.
4481 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4482 u16 heads
, u16 sectors
)
4484 struct ata_taskfile tf
;
4485 unsigned int err_mask
;
4487 /* Number of sectors per track 1-255. Number of heads 1-16 */
4488 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4489 return AC_ERR_INVALID
;
4491 /* set up init dev params taskfile */
4492 DPRINTK("init dev params \n");
4494 ata_tf_init(dev
, &tf
);
4495 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4496 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4497 tf
.protocol
= ATA_PROT_NODATA
;
4499 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4501 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4502 /* A clean abort indicates an original or just out of spec drive
4503 and we should continue as we issue the setup based on the
4504 drive reported working geometry */
4505 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4508 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4513 * ata_sg_clean - Unmap DMA memory associated with command
4514 * @qc: Command containing DMA memory to be released
4516 * Unmap all mapped DMA memory associated with this command.
4519 * spin_lock_irqsave(host lock)
4521 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4523 struct ata_port
*ap
= qc
->ap
;
4524 struct scatterlist
*sg
= qc
->sg
;
4525 int dir
= qc
->dma_dir
;
4527 WARN_ON_ONCE(sg
== NULL
);
4529 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4532 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4534 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4539 * atapi_check_dma - Check whether ATAPI DMA can be supported
4540 * @qc: Metadata associated with taskfile to check
4542 * Allow low-level driver to filter ATA PACKET commands, returning
4543 * a status indicating whether or not it is OK to use DMA for the
4544 * supplied PACKET command.
4547 * spin_lock_irqsave(host lock)
4549 * RETURNS: 0 when ATAPI DMA can be used
4552 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4554 struct ata_port
*ap
= qc
->ap
;
4556 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4557 * few ATAPI devices choke on such DMA requests.
4559 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4560 unlikely(qc
->nbytes
& 15))
4563 if (ap
->ops
->check_atapi_dma
)
4564 return ap
->ops
->check_atapi_dma(qc
);
4570 * ata_std_qc_defer - Check whether a qc needs to be deferred
4571 * @qc: ATA command in question
4573 * Non-NCQ commands cannot run with any other command, NCQ or
4574 * not. As upper layer only knows the queue depth, we are
4575 * responsible for maintaining exclusion. This function checks
4576 * whether a new command @qc can be issued.
4579 * spin_lock_irqsave(host lock)
4582 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4584 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4586 struct ata_link
*link
= qc
->dev
->link
;
4588 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4589 if (!ata_tag_valid(link
->active_tag
))
4592 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4596 return ATA_DEFER_LINK
;
4599 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4602 * ata_sg_init - Associate command with scatter-gather table.
4603 * @qc: Command to be associated
4604 * @sg: Scatter-gather table.
4605 * @n_elem: Number of elements in s/g table.
4607 * Initialize the data-related elements of queued_cmd @qc
4608 * to point to a scatter-gather table @sg, containing @n_elem
4612 * spin_lock_irqsave(host lock)
4614 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4615 unsigned int n_elem
)
4618 qc
->n_elem
= n_elem
;
4623 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4624 * @qc: Command with scatter-gather table to be mapped.
4626 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4629 * spin_lock_irqsave(host lock)
4632 * Zero on success, negative on error.
4635 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4637 struct ata_port
*ap
= qc
->ap
;
4638 unsigned int n_elem
;
4640 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4642 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4646 DPRINTK("%d sg elements mapped\n", n_elem
);
4647 qc
->orig_n_elem
= qc
->n_elem
;
4648 qc
->n_elem
= n_elem
;
4649 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4655 * swap_buf_le16 - swap halves of 16-bit words in place
4656 * @buf: Buffer to swap
4657 * @buf_words: Number of 16-bit words in buffer.
4659 * Swap halves of 16-bit words if needed to convert from
4660 * little-endian byte order to native cpu byte order, or
4664 * Inherited from caller.
4666 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4671 for (i
= 0; i
< buf_words
; i
++)
4672 buf
[i
] = le16_to_cpu(buf
[i
]);
4673 #endif /* __BIG_ENDIAN */
4677 * ata_qc_new - Request an available ATA command, for queueing
4684 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4686 struct ata_queued_cmd
*qc
= NULL
;
4689 /* no command while frozen */
4690 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4693 /* the last tag is reserved for internal command. */
4694 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4695 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4696 qc
= __ata_qc_from_tag(ap
, i
);
4707 * ata_qc_new_init - Request an available ATA command, and initialize it
4708 * @dev: Device from whom we request an available command structure
4714 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4716 struct ata_port
*ap
= dev
->link
->ap
;
4717 struct ata_queued_cmd
*qc
;
4719 qc
= ata_qc_new(ap
);
4732 * ata_qc_free - free unused ata_queued_cmd
4733 * @qc: Command to complete
4735 * Designed to free unused ata_queued_cmd object
4736 * in case something prevents using it.
4739 * spin_lock_irqsave(host lock)
4741 void ata_qc_free(struct ata_queued_cmd
*qc
)
4743 struct ata_port
*ap
;
4746 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4751 if (likely(ata_tag_valid(tag
))) {
4752 qc
->tag
= ATA_TAG_POISON
;
4753 clear_bit(tag
, &ap
->qc_allocated
);
4757 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4759 struct ata_port
*ap
;
4760 struct ata_link
*link
;
4762 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4763 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4765 link
= qc
->dev
->link
;
4767 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4770 /* command should be marked inactive atomically with qc completion */
4771 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4772 link
->sactive
&= ~(1 << qc
->tag
);
4774 ap
->nr_active_links
--;
4776 link
->active_tag
= ATA_TAG_POISON
;
4777 ap
->nr_active_links
--;
4780 /* clear exclusive status */
4781 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4782 ap
->excl_link
== link
))
4783 ap
->excl_link
= NULL
;
4785 /* atapi: mark qc as inactive to prevent the interrupt handler
4786 * from completing the command twice later, before the error handler
4787 * is called. (when rc != 0 and atapi request sense is needed)
4789 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4790 ap
->qc_active
&= ~(1 << qc
->tag
);
4792 /* call completion callback */
4793 qc
->complete_fn(qc
);
4796 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4798 struct ata_port
*ap
= qc
->ap
;
4800 qc
->result_tf
.flags
= qc
->tf
.flags
;
4801 ap
->ops
->qc_fill_rtf(qc
);
4804 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4806 struct ata_device
*dev
= qc
->dev
;
4808 if (ata_is_nodata(qc
->tf
.protocol
))
4811 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4814 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4818 * ata_qc_complete - Complete an active ATA command
4819 * @qc: Command to complete
4821 * Indicate to the mid and upper layers that an ATA command has
4822 * completed, with either an ok or not-ok status.
4824 * Refrain from calling this function multiple times when
4825 * successfully completing multiple NCQ commands.
4826 * ata_qc_complete_multiple() should be used instead, which will
4827 * properly update IRQ expect state.
4830 * spin_lock_irqsave(host lock)
4832 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4834 struct ata_port
*ap
= qc
->ap
;
4836 /* XXX: New EH and old EH use different mechanisms to
4837 * synchronize EH with regular execution path.
4839 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4840 * Normal execution path is responsible for not accessing a
4841 * failed qc. libata core enforces the rule by returning NULL
4842 * from ata_qc_from_tag() for failed qcs.
4844 * Old EH depends on ata_qc_complete() nullifying completion
4845 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4846 * not synchronize with interrupt handler. Only PIO task is
4849 if (ap
->ops
->error_handler
) {
4850 struct ata_device
*dev
= qc
->dev
;
4851 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4853 if (unlikely(qc
->err_mask
))
4854 qc
->flags
|= ATA_QCFLAG_FAILED
;
4857 * Finish internal commands without any further processing
4858 * and always with the result TF filled.
4860 if (unlikely(ata_tag_internal(qc
->tag
))) {
4862 __ata_qc_complete(qc
);
4867 * Non-internal qc has failed. Fill the result TF and
4870 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4872 ata_qc_schedule_eh(qc
);
4876 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4878 /* read result TF if requested */
4879 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4882 /* Some commands need post-processing after successful
4885 switch (qc
->tf
.command
) {
4886 case ATA_CMD_SET_FEATURES
:
4887 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4888 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4891 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4892 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4893 /* revalidate device */
4894 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4895 ata_port_schedule_eh(ap
);
4899 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4903 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4904 ata_verify_xfer(qc
);
4906 __ata_qc_complete(qc
);
4908 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4911 /* read result TF if failed or requested */
4912 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4915 __ata_qc_complete(qc
);
4920 * ata_qc_complete_multiple - Complete multiple qcs successfully
4921 * @ap: port in question
4922 * @qc_active: new qc_active mask
4924 * Complete in-flight commands. This functions is meant to be
4925 * called from low-level driver's interrupt routine to complete
4926 * requests normally. ap->qc_active and @qc_active is compared
4927 * and commands are completed accordingly.
4929 * Always use this function when completing multiple NCQ commands
4930 * from IRQ handlers instead of calling ata_qc_complete()
4931 * multiple times to keep IRQ expect status properly in sync.
4934 * spin_lock_irqsave(host lock)
4937 * Number of completed commands on success, -errno otherwise.
4939 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
4944 done_mask
= ap
->qc_active
^ qc_active
;
4946 if (unlikely(done_mask
& qc_active
)) {
4947 ata_port_err(ap
, "illegal qc_active transition (%08x->%08x)\n",
4948 ap
->qc_active
, qc_active
);
4953 struct ata_queued_cmd
*qc
;
4954 unsigned int tag
= __ffs(done_mask
);
4956 qc
= ata_qc_from_tag(ap
, tag
);
4958 ata_qc_complete(qc
);
4961 done_mask
&= ~(1 << tag
);
4968 * ata_qc_issue - issue taskfile to device
4969 * @qc: command to issue to device
4971 * Prepare an ATA command to submission to device.
4972 * This includes mapping the data into a DMA-able
4973 * area, filling in the S/G table, and finally
4974 * writing the taskfile to hardware, starting the command.
4977 * spin_lock_irqsave(host lock)
4979 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4981 struct ata_port
*ap
= qc
->ap
;
4982 struct ata_link
*link
= qc
->dev
->link
;
4983 u8 prot
= qc
->tf
.protocol
;
4985 /* Make sure only one non-NCQ command is outstanding. The
4986 * check is skipped for old EH because it reuses active qc to
4987 * request ATAPI sense.
4989 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4991 if (ata_is_ncq(prot
)) {
4992 WARN_ON_ONCE(link
->sactive
& (1 << qc
->tag
));
4995 ap
->nr_active_links
++;
4996 link
->sactive
|= 1 << qc
->tag
;
4998 WARN_ON_ONCE(link
->sactive
);
5000 ap
->nr_active_links
++;
5001 link
->active_tag
= qc
->tag
;
5004 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5005 ap
->qc_active
|= 1 << qc
->tag
;
5008 * We guarantee to LLDs that they will have at least one
5009 * non-zero sg if the command is a data command.
5011 if (WARN_ON_ONCE(ata_is_data(prot
) &&
5012 (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
)))
5015 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5016 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
5017 if (ata_sg_setup(qc
))
5020 /* if device is sleeping, schedule reset and abort the link */
5021 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5022 link
->eh_info
.action
|= ATA_EH_RESET
;
5023 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5024 ata_link_abort(link
);
5028 ap
->ops
->qc_prep(qc
);
5030 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5031 if (unlikely(qc
->err_mask
))
5036 qc
->err_mask
|= AC_ERR_SYSTEM
;
5038 ata_qc_complete(qc
);
5042 * sata_scr_valid - test whether SCRs are accessible
5043 * @link: ATA link to test SCR accessibility for
5045 * Test whether SCRs are accessible for @link.
5051 * 1 if SCRs are accessible, 0 otherwise.
5053 int sata_scr_valid(struct ata_link
*link
)
5055 struct ata_port
*ap
= link
->ap
;
5057 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5061 * sata_scr_read - read SCR register of the specified port
5062 * @link: ATA link to read SCR for
5064 * @val: Place to store read value
5066 * Read SCR register @reg of @link into *@val. This function is
5067 * guaranteed to succeed if @link is ap->link, the cable type of
5068 * the port is SATA and the port implements ->scr_read.
5071 * None if @link is ap->link. Kernel thread context otherwise.
5074 * 0 on success, negative errno on failure.
5076 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5078 if (ata_is_host_link(link
)) {
5079 if (sata_scr_valid(link
))
5080 return link
->ap
->ops
->scr_read(link
, reg
, val
);
5084 return sata_pmp_scr_read(link
, reg
, val
);
5088 * sata_scr_write - write SCR register of the specified port
5089 * @link: ATA link to write SCR for
5090 * @reg: SCR to write
5091 * @val: value to write
5093 * Write @val to SCR register @reg of @link. This function is
5094 * guaranteed to succeed if @link is ap->link, the cable type of
5095 * the port is SATA and the port implements ->scr_read.
5098 * None if @link is ap->link. Kernel thread context otherwise.
5101 * 0 on success, negative errno on failure.
5103 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5105 if (ata_is_host_link(link
)) {
5106 if (sata_scr_valid(link
))
5107 return link
->ap
->ops
->scr_write(link
, reg
, val
);
5111 return sata_pmp_scr_write(link
, reg
, val
);
5115 * sata_scr_write_flush - write SCR register of the specified port and flush
5116 * @link: ATA link to write SCR for
5117 * @reg: SCR to write
5118 * @val: value to write
5120 * This function is identical to sata_scr_write() except that this
5121 * function performs flush after writing to the register.
5124 * None if @link is ap->link. Kernel thread context otherwise.
5127 * 0 on success, negative errno on failure.
5129 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5131 if (ata_is_host_link(link
)) {
5134 if (sata_scr_valid(link
)) {
5135 rc
= link
->ap
->ops
->scr_write(link
, reg
, val
);
5137 rc
= link
->ap
->ops
->scr_read(link
, reg
, &val
);
5143 return sata_pmp_scr_write(link
, reg
, val
);
5147 * ata_phys_link_online - test whether the given link is online
5148 * @link: ATA link to test
5150 * Test whether @link is online. Note that this function returns
5151 * 0 if online status of @link cannot be obtained, so
5152 * ata_link_online(link) != !ata_link_offline(link).
5158 * True if the port online status is available and online.
5160 bool ata_phys_link_online(struct ata_link
*link
)
5164 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5165 ata_sstatus_online(sstatus
))
5171 * ata_phys_link_offline - test whether the given link is offline
5172 * @link: ATA link to test
5174 * Test whether @link is offline. Note that this function
5175 * returns 0 if offline status of @link cannot be obtained, so
5176 * ata_link_online(link) != !ata_link_offline(link).
5182 * True if the port offline status is available and offline.
5184 bool ata_phys_link_offline(struct ata_link
*link
)
5188 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5189 !ata_sstatus_online(sstatus
))
5195 * ata_link_online - test whether the given link is online
5196 * @link: ATA link to test
5198 * Test whether @link is online. This is identical to
5199 * ata_phys_link_online() when there's no slave link. When
5200 * there's a slave link, this function should only be called on
5201 * the master link and will return true if any of M/S links is
5208 * True if the port online status is available and online.
5210 bool ata_link_online(struct ata_link
*link
)
5212 struct ata_link
*slave
= link
->ap
->slave_link
;
5214 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5216 return ata_phys_link_online(link
) ||
5217 (slave
&& ata_phys_link_online(slave
));
5221 * ata_link_offline - test whether the given link is offline
5222 * @link: ATA link to test
5224 * Test whether @link is offline. This is identical to
5225 * ata_phys_link_offline() when there's no slave link. When
5226 * there's a slave link, this function should only be called on
5227 * the master link and will return true if both M/S links are
5234 * True if the port offline status is available and offline.
5236 bool ata_link_offline(struct ata_link
*link
)
5238 struct ata_link
*slave
= link
->ap
->slave_link
;
5240 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5242 return ata_phys_link_offline(link
) &&
5243 (!slave
|| ata_phys_link_offline(slave
));
5247 static int ata_port_request_pm(struct ata_port
*ap
, pm_message_t mesg
,
5248 unsigned int action
, unsigned int ehi_flags
,
5251 struct ata_link
*link
;
5252 unsigned long flags
;
5255 /* Previous resume operation might still be in
5256 * progress. Wait for PM_PENDING to clear.
5258 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5259 ata_port_wait_eh(ap
);
5260 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5263 /* request PM ops to EH */
5264 spin_lock_irqsave(ap
->lock
, flags
);
5269 ap
->pm_result
= &rc
;
5272 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5273 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5274 link
->eh_info
.action
|= action
;
5275 link
->eh_info
.flags
|= ehi_flags
;
5278 ata_port_schedule_eh(ap
);
5280 spin_unlock_irqrestore(ap
->lock
, flags
);
5282 /* wait and check result */
5284 ata_port_wait_eh(ap
);
5285 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5291 static int ata_port_suspend_common(struct device
*dev
, pm_message_t mesg
)
5293 struct ata_port
*ap
= to_ata_port(dev
);
5294 unsigned int ehi_flags
= ATA_EHI_QUIET
;
5298 * On some hardware, device fails to respond after spun down
5299 * for suspend. As the device won't be used before being
5300 * resumed, we don't need to touch the device. Ask EH to skip
5301 * the usual stuff and proceed directly to suspend.
5303 * http://thread.gmane.org/gmane.linux.ide/46764
5305 if (mesg
.event
== PM_EVENT_SUSPEND
)
5306 ehi_flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_NO_RECOVERY
;
5308 rc
= ata_port_request_pm(ap
, mesg
, 0, ehi_flags
, 1);
5312 static int ata_port_suspend(struct device
*dev
)
5314 if (pm_runtime_suspended(dev
))
5317 return ata_port_suspend_common(dev
, PMSG_SUSPEND
);
5320 static int ata_port_do_freeze(struct device
*dev
)
5322 if (pm_runtime_suspended(dev
))
5323 pm_runtime_resume(dev
);
5325 return ata_port_suspend_common(dev
, PMSG_FREEZE
);
5328 static int ata_port_poweroff(struct device
*dev
)
5330 if (pm_runtime_suspended(dev
))
5333 return ata_port_suspend_common(dev
, PMSG_HIBERNATE
);
5336 static int ata_port_resume_common(struct device
*dev
)
5338 struct ata_port
*ap
= to_ata_port(dev
);
5341 rc
= ata_port_request_pm(ap
, PMSG_ON
, ATA_EH_RESET
,
5342 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 1);
5346 static int ata_port_resume(struct device
*dev
)
5350 rc
= ata_port_resume_common(dev
);
5352 pm_runtime_disable(dev
);
5353 pm_runtime_set_active(dev
);
5354 pm_runtime_enable(dev
);
5360 static int ata_port_runtime_idle(struct device
*dev
)
5362 return pm_runtime_suspend(dev
);
5365 static const struct dev_pm_ops ata_port_pm_ops
= {
5366 .suspend
= ata_port_suspend
,
5367 .resume
= ata_port_resume
,
5368 .freeze
= ata_port_do_freeze
,
5369 .thaw
= ata_port_resume
,
5370 .poweroff
= ata_port_poweroff
,
5371 .restore
= ata_port_resume
,
5373 .runtime_suspend
= ata_port_suspend
,
5374 .runtime_resume
= ata_port_resume_common
,
5375 .runtime_idle
= ata_port_runtime_idle
,
5379 * ata_host_suspend - suspend host
5380 * @host: host to suspend
5383 * Suspend @host. Actual operation is performed by port suspend.
5385 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5387 host
->dev
->power
.power_state
= mesg
;
5392 * ata_host_resume - resume host
5393 * @host: host to resume
5395 * Resume @host. Actual operation is performed by port resume.
5397 void ata_host_resume(struct ata_host
*host
)
5399 host
->dev
->power
.power_state
= PMSG_ON
;
5403 struct device_type ata_port_type
= {
5406 .pm
= &ata_port_pm_ops
,
5411 * ata_dev_init - Initialize an ata_device structure
5412 * @dev: Device structure to initialize
5414 * Initialize @dev in preparation for probing.
5417 * Inherited from caller.
5419 void ata_dev_init(struct ata_device
*dev
)
5421 struct ata_link
*link
= ata_dev_phys_link(dev
);
5422 struct ata_port
*ap
= link
->ap
;
5423 unsigned long flags
;
5425 /* SATA spd limit is bound to the attached device, reset together */
5426 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5429 /* High bits of dev->flags are used to record warm plug
5430 * requests which occur asynchronously. Synchronize using
5433 spin_lock_irqsave(ap
->lock
, flags
);
5434 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5436 spin_unlock_irqrestore(ap
->lock
, flags
);
5438 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5439 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5440 dev
->pio_mask
= UINT_MAX
;
5441 dev
->mwdma_mask
= UINT_MAX
;
5442 dev
->udma_mask
= UINT_MAX
;
5446 * ata_link_init - Initialize an ata_link structure
5447 * @ap: ATA port link is attached to
5448 * @link: Link structure to initialize
5449 * @pmp: Port multiplier port number
5454 * Kernel thread context (may sleep)
5456 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5460 /* clear everything except for devices */
5461 memset((void *)link
+ ATA_LINK_CLEAR_BEGIN
, 0,
5462 ATA_LINK_CLEAR_END
- ATA_LINK_CLEAR_BEGIN
);
5466 link
->active_tag
= ATA_TAG_POISON
;
5467 link
->hw_sata_spd_limit
= UINT_MAX
;
5469 /* can't use iterator, ap isn't initialized yet */
5470 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5471 struct ata_device
*dev
= &link
->device
[i
];
5474 dev
->devno
= dev
- link
->device
;
5475 #ifdef CONFIG_ATA_ACPI
5476 dev
->gtf_filter
= ata_acpi_gtf_filter
;
5483 * sata_link_init_spd - Initialize link->sata_spd_limit
5484 * @link: Link to configure sata_spd_limit for
5486 * Initialize @link->[hw_]sata_spd_limit to the currently
5490 * Kernel thread context (may sleep).
5493 * 0 on success, -errno on failure.
5495 int sata_link_init_spd(struct ata_link
*link
)
5500 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5504 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5506 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5508 ata_force_link_limits(link
);
5510 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5516 * ata_port_alloc - allocate and initialize basic ATA port resources
5517 * @host: ATA host this allocated port belongs to
5519 * Allocate and initialize basic ATA port resources.
5522 * Allocate ATA port on success, NULL on failure.
5525 * Inherited from calling layer (may sleep).
5527 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5529 struct ata_port
*ap
;
5533 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5537 ap
->pflags
|= ATA_PFLAG_INITIALIZING
| ATA_PFLAG_FROZEN
;
5538 ap
->lock
= &host
->lock
;
5541 ap
->dev
= host
->dev
;
5543 #if defined(ATA_VERBOSE_DEBUG)
5544 /* turn on all debugging levels */
5545 ap
->msg_enable
= 0x00FF;
5546 #elif defined(ATA_DEBUG)
5547 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5549 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5552 mutex_init(&ap
->scsi_scan_mutex
);
5553 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5554 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5555 INIT_LIST_HEAD(&ap
->eh_done_q
);
5556 init_waitqueue_head(&ap
->eh_wait_q
);
5557 init_completion(&ap
->park_req_pending
);
5558 init_timer_deferrable(&ap
->fastdrain_timer
);
5559 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5560 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5562 ap
->cbl
= ATA_CBL_NONE
;
5564 ata_link_init(ap
, &ap
->link
, 0);
5567 ap
->stats
.unhandled_irq
= 1;
5568 ap
->stats
.idle_irq
= 1;
5570 ata_sff_port_init(ap
);
5575 static void ata_host_release(struct device
*gendev
, void *res
)
5577 struct ata_host
*host
= dev_get_drvdata(gendev
);
5580 for (i
= 0; i
< host
->n_ports
; i
++) {
5581 struct ata_port
*ap
= host
->ports
[i
];
5587 scsi_host_put(ap
->scsi_host
);
5589 kfree(ap
->pmp_link
);
5590 kfree(ap
->slave_link
);
5592 host
->ports
[i
] = NULL
;
5595 dev_set_drvdata(gendev
, NULL
);
5599 * ata_host_alloc - allocate and init basic ATA host resources
5600 * @dev: generic device this host is associated with
5601 * @max_ports: maximum number of ATA ports associated with this host
5603 * Allocate and initialize basic ATA host resources. LLD calls
5604 * this function to allocate a host, initializes it fully and
5605 * attaches it using ata_host_register().
5607 * @max_ports ports are allocated and host->n_ports is
5608 * initialized to @max_ports. The caller is allowed to decrease
5609 * host->n_ports before calling ata_host_register(). The unused
5610 * ports will be automatically freed on registration.
5613 * Allocate ATA host on success, NULL on failure.
5616 * Inherited from calling layer (may sleep).
5618 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5620 struct ata_host
*host
;
5626 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5629 /* alloc a container for our list of ATA ports (buses) */
5630 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5631 /* alloc a container for our list of ATA ports (buses) */
5632 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5636 devres_add(dev
, host
);
5637 dev_set_drvdata(dev
, host
);
5639 spin_lock_init(&host
->lock
);
5640 mutex_init(&host
->eh_mutex
);
5642 host
->n_ports
= max_ports
;
5644 /* allocate ports bound to this host */
5645 for (i
= 0; i
< max_ports
; i
++) {
5646 struct ata_port
*ap
;
5648 ap
= ata_port_alloc(host
);
5653 host
->ports
[i
] = ap
;
5656 devres_remove_group(dev
, NULL
);
5660 devres_release_group(dev
, NULL
);
5665 * ata_host_alloc_pinfo - alloc host and init with port_info array
5666 * @dev: generic device this host is associated with
5667 * @ppi: array of ATA port_info to initialize host with
5668 * @n_ports: number of ATA ports attached to this host
5670 * Allocate ATA host and initialize with info from @ppi. If NULL
5671 * terminated, @ppi may contain fewer entries than @n_ports. The
5672 * last entry will be used for the remaining ports.
5675 * Allocate ATA host on success, NULL on failure.
5678 * Inherited from calling layer (may sleep).
5680 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5681 const struct ata_port_info
* const * ppi
,
5684 const struct ata_port_info
*pi
;
5685 struct ata_host
*host
;
5688 host
= ata_host_alloc(dev
, n_ports
);
5692 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5693 struct ata_port
*ap
= host
->ports
[i
];
5698 ap
->pio_mask
= pi
->pio_mask
;
5699 ap
->mwdma_mask
= pi
->mwdma_mask
;
5700 ap
->udma_mask
= pi
->udma_mask
;
5701 ap
->flags
|= pi
->flags
;
5702 ap
->link
.flags
|= pi
->link_flags
;
5703 ap
->ops
= pi
->port_ops
;
5705 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5706 host
->ops
= pi
->port_ops
;
5713 * ata_slave_link_init - initialize slave link
5714 * @ap: port to initialize slave link for
5716 * Create and initialize slave link for @ap. This enables slave
5717 * link handling on the port.
5719 * In libata, a port contains links and a link contains devices.
5720 * There is single host link but if a PMP is attached to it,
5721 * there can be multiple fan-out links. On SATA, there's usually
5722 * a single device connected to a link but PATA and SATA
5723 * controllers emulating TF based interface can have two - master
5726 * However, there are a few controllers which don't fit into this
5727 * abstraction too well - SATA controllers which emulate TF
5728 * interface with both master and slave devices but also have
5729 * separate SCR register sets for each device. These controllers
5730 * need separate links for physical link handling
5731 * (e.g. onlineness, link speed) but should be treated like a
5732 * traditional M/S controller for everything else (e.g. command
5733 * issue, softreset).
5735 * slave_link is libata's way of handling this class of
5736 * controllers without impacting core layer too much. For
5737 * anything other than physical link handling, the default host
5738 * link is used for both master and slave. For physical link
5739 * handling, separate @ap->slave_link is used. All dirty details
5740 * are implemented inside libata core layer. From LLD's POV, the
5741 * only difference is that prereset, hardreset and postreset are
5742 * called once more for the slave link, so the reset sequence
5743 * looks like the following.
5745 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5746 * softreset(M) -> postreset(M) -> postreset(S)
5748 * Note that softreset is called only for the master. Softreset
5749 * resets both M/S by definition, so SRST on master should handle
5750 * both (the standard method will work just fine).
5753 * Should be called before host is registered.
5756 * 0 on success, -errno on failure.
5758 int ata_slave_link_init(struct ata_port
*ap
)
5760 struct ata_link
*link
;
5762 WARN_ON(ap
->slave_link
);
5763 WARN_ON(ap
->flags
& ATA_FLAG_PMP
);
5765 link
= kzalloc(sizeof(*link
), GFP_KERNEL
);
5769 ata_link_init(ap
, link
, 1);
5770 ap
->slave_link
= link
;
5774 static void ata_host_stop(struct device
*gendev
, void *res
)
5776 struct ata_host
*host
= dev_get_drvdata(gendev
);
5779 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5781 for (i
= 0; i
< host
->n_ports
; i
++) {
5782 struct ata_port
*ap
= host
->ports
[i
];
5784 if (ap
->ops
->port_stop
)
5785 ap
->ops
->port_stop(ap
);
5788 if (host
->ops
->host_stop
)
5789 host
->ops
->host_stop(host
);
5793 * ata_finalize_port_ops - finalize ata_port_operations
5794 * @ops: ata_port_operations to finalize
5796 * An ata_port_operations can inherit from another ops and that
5797 * ops can again inherit from another. This can go on as many
5798 * times as necessary as long as there is no loop in the
5799 * inheritance chain.
5801 * Ops tables are finalized when the host is started. NULL or
5802 * unspecified entries are inherited from the closet ancestor
5803 * which has the method and the entry is populated with it.
5804 * After finalization, the ops table directly points to all the
5805 * methods and ->inherits is no longer necessary and cleared.
5807 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5812 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5814 static DEFINE_SPINLOCK(lock
);
5815 const struct ata_port_operations
*cur
;
5816 void **begin
= (void **)ops
;
5817 void **end
= (void **)&ops
->inherits
;
5820 if (!ops
|| !ops
->inherits
)
5825 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5826 void **inherit
= (void **)cur
;
5828 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5833 for (pp
= begin
; pp
< end
; pp
++)
5837 ops
->inherits
= NULL
;
5843 * ata_host_start - start and freeze ports of an ATA host
5844 * @host: ATA host to start ports for
5846 * Start and then freeze ports of @host. Started status is
5847 * recorded in host->flags, so this function can be called
5848 * multiple times. Ports are guaranteed to get started only
5849 * once. If host->ops isn't initialized yet, its set to the
5850 * first non-dummy port ops.
5853 * Inherited from calling layer (may sleep).
5856 * 0 if all ports are started successfully, -errno otherwise.
5858 int ata_host_start(struct ata_host
*host
)
5861 void *start_dr
= NULL
;
5864 if (host
->flags
& ATA_HOST_STARTED
)
5867 ata_finalize_port_ops(host
->ops
);
5869 for (i
= 0; i
< host
->n_ports
; i
++) {
5870 struct ata_port
*ap
= host
->ports
[i
];
5872 ata_finalize_port_ops(ap
->ops
);
5874 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5875 host
->ops
= ap
->ops
;
5877 if (ap
->ops
->port_stop
)
5881 if (host
->ops
->host_stop
)
5885 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5890 for (i
= 0; i
< host
->n_ports
; i
++) {
5891 struct ata_port
*ap
= host
->ports
[i
];
5893 if (ap
->ops
->port_start
) {
5894 rc
= ap
->ops
->port_start(ap
);
5898 "failed to start port %d (errno=%d)\n",
5903 ata_eh_freeze_port(ap
);
5907 devres_add(host
->dev
, start_dr
);
5908 host
->flags
|= ATA_HOST_STARTED
;
5913 struct ata_port
*ap
= host
->ports
[i
];
5915 if (ap
->ops
->port_stop
)
5916 ap
->ops
->port_stop(ap
);
5918 devres_free(start_dr
);
5923 * ata_sas_host_init - Initialize a host struct
5924 * @host: host to initialize
5925 * @dev: device host is attached to
5926 * @flags: host flags
5930 * PCI/etc. bus probe sem.
5933 /* KILLME - the only user left is ipr */
5934 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5935 unsigned long flags
, struct ata_port_operations
*ops
)
5937 spin_lock_init(&host
->lock
);
5938 mutex_init(&host
->eh_mutex
);
5940 host
->flags
= flags
;
5944 void __ata_port_probe(struct ata_port
*ap
)
5946 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5947 unsigned long flags
;
5949 /* kick EH for boot probing */
5950 spin_lock_irqsave(ap
->lock
, flags
);
5952 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5953 ehi
->action
|= ATA_EH_RESET
;
5954 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5956 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5957 ap
->pflags
|= ATA_PFLAG_LOADING
;
5958 ata_port_schedule_eh(ap
);
5960 spin_unlock_irqrestore(ap
->lock
, flags
);
5963 int ata_port_probe(struct ata_port
*ap
)
5967 if (ap
->ops
->error_handler
) {
5968 __ata_port_probe(ap
);
5969 ata_port_wait_eh(ap
);
5971 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5972 rc
= ata_bus_probe(ap
);
5973 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5979 static void async_port_probe(void *data
, async_cookie_t cookie
)
5981 struct ata_port
*ap
= data
;
5984 * If we're not allowed to scan this host in parallel,
5985 * we need to wait until all previous scans have completed
5986 * before going further.
5987 * Jeff Garzik says this is only within a controller, so we
5988 * don't need to wait for port 0, only for later ports.
5990 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
5991 async_synchronize_cookie(cookie
);
5993 (void)ata_port_probe(ap
);
5995 /* in order to keep device order, we need to synchronize at this point */
5996 async_synchronize_cookie(cookie
);
5998 ata_scsi_scan_host(ap
, 1);
6002 * ata_host_register - register initialized ATA host
6003 * @host: ATA host to register
6004 * @sht: template for SCSI host
6006 * Register initialized ATA host. @host is allocated using
6007 * ata_host_alloc() and fully initialized by LLD. This function
6008 * starts ports, registers @host with ATA and SCSI layers and
6009 * probe registered devices.
6012 * Inherited from calling layer (may sleep).
6015 * 0 on success, -errno otherwise.
6017 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6021 /* host must have been started */
6022 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6023 dev_err(host
->dev
, "BUG: trying to register unstarted host\n");
6028 /* Blow away unused ports. This happens when LLD can't
6029 * determine the exact number of ports to allocate at
6032 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6033 kfree(host
->ports
[i
]);
6035 /* give ports names and add SCSI hosts */
6036 for (i
= 0; i
< host
->n_ports
; i
++)
6037 host
->ports
[i
]->print_id
= atomic_inc_return(&ata_print_id
);
6040 /* Create associated sysfs transport objects */
6041 for (i
= 0; i
< host
->n_ports
; i
++) {
6042 rc
= ata_tport_add(host
->dev
,host
->ports
[i
]);
6048 rc
= ata_scsi_add_hosts(host
, sht
);
6052 /* associate with ACPI nodes */
6053 ata_acpi_associate(host
);
6055 /* set cable, sata_spd_limit and report */
6056 for (i
= 0; i
< host
->n_ports
; i
++) {
6057 struct ata_port
*ap
= host
->ports
[i
];
6058 unsigned long xfer_mask
;
6060 /* set SATA cable type if still unset */
6061 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6062 ap
->cbl
= ATA_CBL_SATA
;
6064 /* init sata_spd_limit to the current value */
6065 sata_link_init_spd(&ap
->link
);
6067 sata_link_init_spd(ap
->slave_link
);
6069 /* print per-port info to dmesg */
6070 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6073 if (!ata_port_is_dummy(ap
)) {
6074 ata_port_info(ap
, "%cATA max %s %s\n",
6075 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6076 ata_mode_string(xfer_mask
),
6077 ap
->link
.eh_info
.desc
);
6078 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6080 ata_port_info(ap
, "DUMMY\n");
6083 /* perform each probe asynchronously */
6084 for (i
= 0; i
< host
->n_ports
; i
++) {
6085 struct ata_port
*ap
= host
->ports
[i
];
6086 async_schedule(async_port_probe
, ap
);
6093 ata_tport_delete(host
->ports
[i
]);
6100 * ata_host_activate - start host, request IRQ and register it
6101 * @host: target ATA host
6102 * @irq: IRQ to request
6103 * @irq_handler: irq_handler used when requesting IRQ
6104 * @irq_flags: irq_flags used when requesting IRQ
6105 * @sht: scsi_host_template to use when registering the host
6107 * After allocating an ATA host and initializing it, most libata
6108 * LLDs perform three steps to activate the host - start host,
6109 * request IRQ and register it. This helper takes necessasry
6110 * arguments and performs the three steps in one go.
6112 * An invalid IRQ skips the IRQ registration and expects the host to
6113 * have set polling mode on the port. In this case, @irq_handler
6117 * Inherited from calling layer (may sleep).
6120 * 0 on success, -errno otherwise.
6122 int ata_host_activate(struct ata_host
*host
, int irq
,
6123 irq_handler_t irq_handler
, unsigned long irq_flags
,
6124 struct scsi_host_template
*sht
)
6128 rc
= ata_host_start(host
);
6132 /* Special case for polling mode */
6134 WARN_ON(irq_handler
);
6135 return ata_host_register(host
, sht
);
6138 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6139 dev_driver_string(host
->dev
), host
);
6143 for (i
= 0; i
< host
->n_ports
; i
++)
6144 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6146 rc
= ata_host_register(host
, sht
);
6147 /* if failed, just free the IRQ and leave ports alone */
6149 devm_free_irq(host
->dev
, irq
, host
);
6155 * ata_port_detach - Detach ATA port in prepration of device removal
6156 * @ap: ATA port to be detached
6158 * Detach all ATA devices and the associated SCSI devices of @ap;
6159 * then, remove the associated SCSI host. @ap is guaranteed to
6160 * be quiescent on return from this function.
6163 * Kernel thread context (may sleep).
6165 static void ata_port_detach(struct ata_port
*ap
)
6167 unsigned long flags
;
6169 if (!ap
->ops
->error_handler
)
6172 /* tell EH we're leaving & flush EH */
6173 spin_lock_irqsave(ap
->lock
, flags
);
6174 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6175 ata_port_schedule_eh(ap
);
6176 spin_unlock_irqrestore(ap
->lock
, flags
);
6178 /* wait till EH commits suicide */
6179 ata_port_wait_eh(ap
);
6181 /* it better be dead now */
6182 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
6184 cancel_delayed_work_sync(&ap
->hotplug_task
);
6189 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
6190 ata_tlink_delete(&ap
->pmp_link
[i
]);
6192 ata_tport_delete(ap
);
6194 /* remove the associated SCSI host */
6195 scsi_remove_host(ap
->scsi_host
);
6199 * ata_host_detach - Detach all ports of an ATA host
6200 * @host: Host to detach
6202 * Detach all ports of @host.
6205 * Kernel thread context (may sleep).
6207 void ata_host_detach(struct ata_host
*host
)
6211 for (i
= 0; i
< host
->n_ports
; i
++)
6212 ata_port_detach(host
->ports
[i
]);
6214 /* the host is dead now, dissociate ACPI */
6215 ata_acpi_dissociate(host
);
6221 * ata_pci_remove_one - PCI layer callback for device removal
6222 * @pdev: PCI device that was removed
6224 * PCI layer indicates to libata via this hook that hot-unplug or
6225 * module unload event has occurred. Detach all ports. Resource
6226 * release is handled via devres.
6229 * Inherited from PCI layer (may sleep).
6231 void ata_pci_remove_one(struct pci_dev
*pdev
)
6233 struct device
*dev
= &pdev
->dev
;
6234 struct ata_host
*host
= dev_get_drvdata(dev
);
6236 ata_host_detach(host
);
6239 /* move to PCI subsystem */
6240 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6242 unsigned long tmp
= 0;
6244 switch (bits
->width
) {
6247 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6253 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6259 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6270 return (tmp
== bits
->val
) ? 1 : 0;
6274 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6276 pci_save_state(pdev
);
6277 pci_disable_device(pdev
);
6279 if (mesg
.event
& PM_EVENT_SLEEP
)
6280 pci_set_power_state(pdev
, PCI_D3hot
);
6283 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6287 pci_set_power_state(pdev
, PCI_D0
);
6288 pci_restore_state(pdev
);
6290 rc
= pcim_enable_device(pdev
);
6293 "failed to enable device after resume (%d)\n", rc
);
6297 pci_set_master(pdev
);
6301 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6303 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6306 rc
= ata_host_suspend(host
, mesg
);
6310 ata_pci_device_do_suspend(pdev
, mesg
);
6315 int ata_pci_device_resume(struct pci_dev
*pdev
)
6317 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6320 rc
= ata_pci_device_do_resume(pdev
);
6322 ata_host_resume(host
);
6325 #endif /* CONFIG_PM */
6327 #endif /* CONFIG_PCI */
6329 static int __init
ata_parse_force_one(char **cur
,
6330 struct ata_force_ent
*force_ent
,
6331 const char **reason
)
6333 /* FIXME: Currently, there's no way to tag init const data and
6334 * using __initdata causes build failure on some versions of
6335 * gcc. Once __initdataconst is implemented, add const to the
6336 * following structure.
6338 static struct ata_force_param force_tbl
[] __initdata
= {
6339 { "40c", .cbl
= ATA_CBL_PATA40
},
6340 { "80c", .cbl
= ATA_CBL_PATA80
},
6341 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6342 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6343 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6344 { "sata", .cbl
= ATA_CBL_SATA
},
6345 { "1.5Gbps", .spd_limit
= 1 },
6346 { "3.0Gbps", .spd_limit
= 2 },
6347 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6348 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6349 { "dump_id", .horkage_on
= ATA_HORKAGE_DUMP_ID
},
6350 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6351 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6352 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6353 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6354 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6355 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6356 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6357 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6358 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6359 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6360 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6361 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6362 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6363 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6364 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6365 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6366 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6367 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6368 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6369 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6370 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6371 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6372 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6373 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6374 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6375 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6376 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6377 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6378 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6379 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6380 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6381 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6382 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6383 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6384 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6385 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6386 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6388 char *start
= *cur
, *p
= *cur
;
6389 char *id
, *val
, *endp
;
6390 const struct ata_force_param
*match_fp
= NULL
;
6391 int nr_matches
= 0, i
;
6393 /* find where this param ends and update *cur */
6394 while (*p
!= '\0' && *p
!= ',')
6405 p
= strchr(start
, ':');
6407 val
= strstrip(start
);
6412 id
= strstrip(start
);
6413 val
= strstrip(p
+ 1);
6416 p
= strchr(id
, '.');
6419 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6420 if (p
== endp
|| *endp
!= '\0') {
6421 *reason
= "invalid device";
6426 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6427 if (p
== endp
|| *endp
!= '\0') {
6428 *reason
= "invalid port/link";
6433 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6434 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6435 const struct ata_force_param
*fp
= &force_tbl
[i
];
6437 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6443 if (strcasecmp(val
, fp
->name
) == 0) {
6450 *reason
= "unknown value";
6453 if (nr_matches
> 1) {
6454 *reason
= "ambigious value";
6458 force_ent
->param
= *match_fp
;
6463 static void __init
ata_parse_force_param(void)
6465 int idx
= 0, size
= 1;
6466 int last_port
= -1, last_device
= -1;
6467 char *p
, *cur
, *next
;
6469 /* calculate maximum number of params and allocate force_tbl */
6470 for (p
= ata_force_param_buf
; *p
; p
++)
6474 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6475 if (!ata_force_tbl
) {
6476 printk(KERN_WARNING
"ata: failed to extend force table, "
6477 "libata.force ignored\n");
6481 /* parse and populate the table */
6482 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6483 const char *reason
= "";
6484 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6487 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6488 printk(KERN_WARNING
"ata: failed to parse force "
6489 "parameter \"%s\" (%s)\n",
6494 if (te
.port
== -1) {
6495 te
.port
= last_port
;
6496 te
.device
= last_device
;
6499 ata_force_tbl
[idx
++] = te
;
6501 last_port
= te
.port
;
6502 last_device
= te
.device
;
6505 ata_force_tbl_size
= idx
;
6508 static int __init
ata_init(void)
6512 ata_parse_force_param();
6514 ata_acpi_register();
6516 rc
= ata_sff_init();
6518 kfree(ata_force_tbl
);
6522 libata_transport_init();
6523 ata_scsi_transport_template
= ata_attach_transport();
6524 if (!ata_scsi_transport_template
) {
6530 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6537 static void __exit
ata_exit(void)
6539 ata_release_transport(ata_scsi_transport_template
);
6540 libata_transport_exit();
6542 ata_acpi_unregister();
6543 kfree(ata_force_tbl
);
6546 subsys_initcall(ata_init
);
6547 module_exit(ata_exit
);
6549 static DEFINE_RATELIMIT_STATE(ratelimit
, HZ
/ 5, 1);
6551 int ata_ratelimit(void)
6553 return __ratelimit(&ratelimit
);
6557 * ata_msleep - ATA EH owner aware msleep
6558 * @ap: ATA port to attribute the sleep to
6559 * @msecs: duration to sleep in milliseconds
6561 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6562 * ownership is released before going to sleep and reacquired
6563 * after the sleep is complete. IOW, other ports sharing the
6564 * @ap->host will be allowed to own the EH while this task is
6570 void ata_msleep(struct ata_port
*ap
, unsigned int msecs
)
6572 bool owns_eh
= ap
&& ap
->host
->eh_owner
== current
;
6584 * ata_wait_register - wait until register value changes
6585 * @ap: ATA port to wait register for, can be NULL
6586 * @reg: IO-mapped register
6587 * @mask: Mask to apply to read register value
6588 * @val: Wait condition
6589 * @interval: polling interval in milliseconds
6590 * @timeout: timeout in milliseconds
6592 * Waiting for some bits of register to change is a common
6593 * operation for ATA controllers. This function reads 32bit LE
6594 * IO-mapped register @reg and tests for the following condition.
6596 * (*@reg & mask) != val
6598 * If the condition is met, it returns; otherwise, the process is
6599 * repeated after @interval_msec until timeout.
6602 * Kernel thread context (may sleep)
6605 * The final register value.
6607 u32
ata_wait_register(struct ata_port
*ap
, void __iomem
*reg
, u32 mask
, u32 val
,
6608 unsigned long interval
, unsigned long timeout
)
6610 unsigned long deadline
;
6613 tmp
= ioread32(reg
);
6615 /* Calculate timeout _after_ the first read to make sure
6616 * preceding writes reach the controller before starting to
6617 * eat away the timeout.
6619 deadline
= ata_deadline(jiffies
, timeout
);
6621 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6622 ata_msleep(ap
, interval
);
6623 tmp
= ioread32(reg
);
6632 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6634 return AC_ERR_SYSTEM
;
6637 static void ata_dummy_error_handler(struct ata_port
*ap
)
6642 struct ata_port_operations ata_dummy_port_ops
= {
6643 .qc_prep
= ata_noop_qc_prep
,
6644 .qc_issue
= ata_dummy_qc_issue
,
6645 .error_handler
= ata_dummy_error_handler
,
6648 const struct ata_port_info ata_dummy_port_info
= {
6649 .port_ops
= &ata_dummy_port_ops
,
6653 * Utility print functions
6655 int ata_port_printk(const struct ata_port
*ap
, const char *level
,
6656 const char *fmt
, ...)
6658 struct va_format vaf
;
6662 va_start(args
, fmt
);
6667 r
= printk("%sata%u: %pV", level
, ap
->print_id
, &vaf
);
6673 EXPORT_SYMBOL(ata_port_printk
);
6675 int ata_link_printk(const struct ata_link
*link
, const char *level
,
6676 const char *fmt
, ...)
6678 struct va_format vaf
;
6682 va_start(args
, fmt
);
6687 if (sata_pmp_attached(link
->ap
) || link
->ap
->slave_link
)
6688 r
= printk("%sata%u.%02u: %pV",
6689 level
, link
->ap
->print_id
, link
->pmp
, &vaf
);
6691 r
= printk("%sata%u: %pV",
6692 level
, link
->ap
->print_id
, &vaf
);
6698 EXPORT_SYMBOL(ata_link_printk
);
6700 int ata_dev_printk(const struct ata_device
*dev
, const char *level
,
6701 const char *fmt
, ...)
6703 struct va_format vaf
;
6707 va_start(args
, fmt
);
6712 r
= printk("%sata%u.%02u: %pV",
6713 level
, dev
->link
->ap
->print_id
, dev
->link
->pmp
+ dev
->devno
,
6720 EXPORT_SYMBOL(ata_dev_printk
);
6722 void ata_print_version(const struct device
*dev
, const char *version
)
6724 dev_printk(KERN_DEBUG
, dev
, "version %s\n", version
);
6726 EXPORT_SYMBOL(ata_print_version
);
6729 * libata is essentially a library of internal helper functions for
6730 * low-level ATA host controller drivers. As such, the API/ABI is
6731 * likely to change as new drivers are added and updated.
6732 * Do not depend on ABI/API stability.
6734 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6735 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6736 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6737 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6738 EXPORT_SYMBOL_GPL(sata_port_ops
);
6739 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6740 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6741 EXPORT_SYMBOL_GPL(ata_link_next
);
6742 EXPORT_SYMBOL_GPL(ata_dev_next
);
6743 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6744 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity
);
6745 EXPORT_SYMBOL_GPL(ata_host_init
);
6746 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6747 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6748 EXPORT_SYMBOL_GPL(ata_slave_link_init
);
6749 EXPORT_SYMBOL_GPL(ata_host_start
);
6750 EXPORT_SYMBOL_GPL(ata_host_register
);
6751 EXPORT_SYMBOL_GPL(ata_host_activate
);
6752 EXPORT_SYMBOL_GPL(ata_host_detach
);
6753 EXPORT_SYMBOL_GPL(ata_sg_init
);
6754 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6755 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6756 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6757 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6758 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6759 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6760 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6761 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6762 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6763 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6764 EXPORT_SYMBOL_GPL(ata_mode_string
);
6765 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6766 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6767 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6768 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6769 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6770 EXPORT_SYMBOL_GPL(sata_set_spd
);
6771 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6772 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6773 EXPORT_SYMBOL_GPL(sata_link_resume
);
6774 EXPORT_SYMBOL_GPL(sata_link_scr_lpm
);
6775 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6776 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6777 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6778 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6779 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6780 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6781 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6782 EXPORT_SYMBOL_GPL(ata_msleep
);
6783 EXPORT_SYMBOL_GPL(ata_wait_register
);
6784 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6785 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6786 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6787 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6788 EXPORT_SYMBOL_GPL(__ata_change_queue_depth
);
6789 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6790 EXPORT_SYMBOL_GPL(sata_scr_read
);
6791 EXPORT_SYMBOL_GPL(sata_scr_write
);
6792 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6793 EXPORT_SYMBOL_GPL(ata_link_online
);
6794 EXPORT_SYMBOL_GPL(ata_link_offline
);
6796 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6797 EXPORT_SYMBOL_GPL(ata_host_resume
);
6798 #endif /* CONFIG_PM */
6799 EXPORT_SYMBOL_GPL(ata_id_string
);
6800 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6801 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6802 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6804 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6805 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6806 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6807 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6808 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6811 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6812 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6814 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6815 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6816 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6817 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6818 #endif /* CONFIG_PM */
6819 #endif /* CONFIG_PCI */
6821 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6822 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6823 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6824 EXPORT_SYMBOL_GPL(ata_port_desc
);
6826 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6827 #endif /* CONFIG_PCI */
6828 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6829 EXPORT_SYMBOL_GPL(ata_link_abort
);
6830 EXPORT_SYMBOL_GPL(ata_port_abort
);
6831 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6832 EXPORT_SYMBOL_GPL(sata_async_notification
);
6833 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6834 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6835 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6836 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6837 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6838 EXPORT_SYMBOL_GPL(ata_do_eh
);
6839 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6841 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6842 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6843 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6844 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6845 EXPORT_SYMBOL_GPL(ata_cable_sata
);