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
,
83 .sched_eh
= ata_std_sched_eh
,
84 .end_eh
= ata_std_end_eh
,
87 const struct ata_port_operations sata_port_ops
= {
88 .inherits
= &ata_base_port_ops
,
90 .qc_defer
= ata_std_qc_defer
,
91 .hardreset
= sata_std_hardreset
,
94 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
95 u16 heads
, u16 sectors
);
96 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
);
97 static void ata_dev_xfermask(struct ata_device
*dev
);
98 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
);
100 atomic_t ata_print_id
= ATOMIC_INIT(0);
102 struct ata_force_param
{
106 unsigned long xfer_mask
;
107 unsigned int horkage_on
;
108 unsigned int horkage_off
;
112 struct ata_force_ent
{
115 struct ata_force_param param
;
118 static struct ata_force_ent
*ata_force_tbl
;
119 static int ata_force_tbl_size
;
121 static char ata_force_param_buf
[PAGE_SIZE
] __initdata
;
122 /* param_buf is thrown away after initialization, disallow read */
123 module_param_string(force
, ata_force_param_buf
, sizeof(ata_force_param_buf
), 0);
124 MODULE_PARM_DESC(force
, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
126 static int atapi_enabled
= 1;
127 module_param(atapi_enabled
, int, 0444);
128 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
130 static int atapi_dmadir
= 0;
131 module_param(atapi_dmadir
, int, 0444);
132 MODULE_PARM_DESC(atapi_dmadir
, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
134 int atapi_passthru16
= 1;
135 module_param(atapi_passthru16
, int, 0444);
136 MODULE_PARM_DESC(atapi_passthru16
, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
139 module_param_named(fua
, libata_fua
, int, 0444);
140 MODULE_PARM_DESC(fua
, "FUA support (0=off [default], 1=on)");
142 static int ata_ignore_hpa
;
143 module_param_named(ignore_hpa
, ata_ignore_hpa
, int, 0644);
144 MODULE_PARM_DESC(ignore_hpa
, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
146 static int libata_dma_mask
= ATA_DMA_MASK_ATA
|ATA_DMA_MASK_ATAPI
|ATA_DMA_MASK_CFA
;
147 module_param_named(dma
, libata_dma_mask
, int, 0444);
148 MODULE_PARM_DESC(dma
, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
150 static int ata_probe_timeout
;
151 module_param(ata_probe_timeout
, int, 0444);
152 MODULE_PARM_DESC(ata_probe_timeout
, "Set ATA probing timeout (seconds)");
154 int libata_noacpi
= 0;
155 module_param_named(noacpi
, libata_noacpi
, int, 0444);
156 MODULE_PARM_DESC(noacpi
, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
158 int libata_allow_tpm
= 0;
159 module_param_named(allow_tpm
, libata_allow_tpm
, int, 0444);
160 MODULE_PARM_DESC(allow_tpm
, "Permit the use of TPM commands (0=off [default], 1=on)");
163 module_param(atapi_an
, int, 0444);
164 MODULE_PARM_DESC(atapi_an
, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
166 MODULE_AUTHOR("Jeff Garzik");
167 MODULE_DESCRIPTION("Library module for ATA devices");
168 MODULE_LICENSE("GPL");
169 MODULE_VERSION(DRV_VERSION
);
172 static bool ata_sstatus_online(u32 sstatus
)
174 return (sstatus
& 0xf) == 0x3;
178 * ata_link_next - link iteration helper
179 * @link: the previous link, NULL to start
180 * @ap: ATA port containing links to iterate
181 * @mode: iteration mode, one of ATA_LITER_*
184 * Host lock or EH context.
187 * Pointer to the next link.
189 struct ata_link
*ata_link_next(struct ata_link
*link
, struct ata_port
*ap
,
190 enum ata_link_iter_mode mode
)
192 BUG_ON(mode
!= ATA_LITER_EDGE
&&
193 mode
!= ATA_LITER_PMP_FIRST
&& mode
!= ATA_LITER_HOST_FIRST
);
195 /* NULL link indicates start of iteration */
199 case ATA_LITER_PMP_FIRST
:
200 if (sata_pmp_attached(ap
))
203 case ATA_LITER_HOST_FIRST
:
207 /* we just iterated over the host link, what's next? */
208 if (link
== &ap
->link
)
210 case ATA_LITER_HOST_FIRST
:
211 if (sata_pmp_attached(ap
))
214 case ATA_LITER_PMP_FIRST
:
215 if (unlikely(ap
->slave_link
))
216 return ap
->slave_link
;
222 /* slave_link excludes PMP */
223 if (unlikely(link
== ap
->slave_link
))
226 /* we were over a PMP link */
227 if (++link
< ap
->pmp_link
+ ap
->nr_pmp_links
)
230 if (mode
== ATA_LITER_PMP_FIRST
)
237 * ata_dev_next - device iteration helper
238 * @dev: the previous device, NULL to start
239 * @link: ATA link containing devices to iterate
240 * @mode: iteration mode, one of ATA_DITER_*
243 * Host lock or EH context.
246 * Pointer to the next device.
248 struct ata_device
*ata_dev_next(struct ata_device
*dev
, struct ata_link
*link
,
249 enum ata_dev_iter_mode mode
)
251 BUG_ON(mode
!= ATA_DITER_ENABLED
&& mode
!= ATA_DITER_ENABLED_REVERSE
&&
252 mode
!= ATA_DITER_ALL
&& mode
!= ATA_DITER_ALL_REVERSE
);
254 /* NULL dev indicates start of iteration */
257 case ATA_DITER_ENABLED
:
261 case ATA_DITER_ENABLED_REVERSE
:
262 case ATA_DITER_ALL_REVERSE
:
263 dev
= link
->device
+ ata_link_max_devices(link
) - 1;
268 /* move to the next one */
270 case ATA_DITER_ENABLED
:
272 if (++dev
< link
->device
+ ata_link_max_devices(link
))
275 case ATA_DITER_ENABLED_REVERSE
:
276 case ATA_DITER_ALL_REVERSE
:
277 if (--dev
>= link
->device
)
283 if ((mode
== ATA_DITER_ENABLED
|| mode
== ATA_DITER_ENABLED_REVERSE
) &&
284 !ata_dev_enabled(dev
))
290 * ata_dev_phys_link - find physical link for a device
291 * @dev: ATA device to look up physical link for
293 * Look up physical link which @dev is attached to. Note that
294 * this is different from @dev->link only when @dev is on slave
295 * link. For all other cases, it's the same as @dev->link.
301 * Pointer to the found physical link.
303 struct ata_link
*ata_dev_phys_link(struct ata_device
*dev
)
305 struct ata_port
*ap
= dev
->link
->ap
;
311 return ap
->slave_link
;
315 * ata_force_cbl - force cable type according to libata.force
316 * @ap: ATA port of interest
318 * Force cable type according to libata.force and whine about it.
319 * The last entry which has matching port number is used, so it
320 * can be specified as part of device force parameters. For
321 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
327 void ata_force_cbl(struct ata_port
*ap
)
331 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
332 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
334 if (fe
->port
!= -1 && fe
->port
!= ap
->print_id
)
337 if (fe
->param
.cbl
== ATA_CBL_NONE
)
340 ap
->cbl
= fe
->param
.cbl
;
341 ata_port_notice(ap
, "FORCE: cable set to %s\n", fe
->param
.name
);
347 * ata_force_link_limits - force link limits according to libata.force
348 * @link: ATA link of interest
350 * Force link flags and SATA spd limit according to libata.force
351 * and whine about it. When only the port part is specified
352 * (e.g. 1:), the limit applies to all links connected to both
353 * the host link and all fan-out ports connected via PMP. If the
354 * device part is specified as 0 (e.g. 1.00:), it specifies the
355 * first fan-out link not the host link. Device number 15 always
356 * points to the host link whether PMP is attached or not. If the
357 * controller has slave link, device number 16 points to it.
362 static void ata_force_link_limits(struct ata_link
*link
)
364 bool did_spd
= false;
365 int linkno
= link
->pmp
;
368 if (ata_is_host_link(link
))
371 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
372 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
374 if (fe
->port
!= -1 && fe
->port
!= link
->ap
->print_id
)
377 if (fe
->device
!= -1 && fe
->device
!= linkno
)
380 /* only honor the first spd limit */
381 if (!did_spd
&& fe
->param
.spd_limit
) {
382 link
->hw_sata_spd_limit
= (1 << fe
->param
.spd_limit
) - 1;
383 ata_link_notice(link
, "FORCE: PHY spd limit set to %s\n",
388 /* let lflags stack */
389 if (fe
->param
.lflags
) {
390 link
->flags
|= fe
->param
.lflags
;
391 ata_link_notice(link
,
392 "FORCE: link flag 0x%x forced -> 0x%x\n",
393 fe
->param
.lflags
, link
->flags
);
399 * ata_force_xfermask - force xfermask according to libata.force
400 * @dev: ATA device of interest
402 * Force xfer_mask according to libata.force and whine about it.
403 * For consistency with link selection, device number 15 selects
404 * the first device connected to the host link.
409 static void ata_force_xfermask(struct ata_device
*dev
)
411 int devno
= dev
->link
->pmp
+ dev
->devno
;
412 int alt_devno
= devno
;
415 /* allow n.15/16 for devices attached to host port */
416 if (ata_is_host_link(dev
->link
))
419 for (i
= ata_force_tbl_size
- 1; i
>= 0; i
--) {
420 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
421 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
423 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
426 if (fe
->device
!= -1 && fe
->device
!= devno
&&
427 fe
->device
!= alt_devno
)
430 if (!fe
->param
.xfer_mask
)
433 ata_unpack_xfermask(fe
->param
.xfer_mask
,
434 &pio_mask
, &mwdma_mask
, &udma_mask
);
436 dev
->udma_mask
= udma_mask
;
437 else if (mwdma_mask
) {
439 dev
->mwdma_mask
= mwdma_mask
;
443 dev
->pio_mask
= pio_mask
;
446 ata_dev_notice(dev
, "FORCE: xfer_mask set to %s\n",
453 * ata_force_horkage - force horkage according to libata.force
454 * @dev: ATA device of interest
456 * Force horkage according to libata.force and whine about it.
457 * For consistency with link selection, device number 15 selects
458 * the first device connected to the host link.
463 static void ata_force_horkage(struct ata_device
*dev
)
465 int devno
= dev
->link
->pmp
+ dev
->devno
;
466 int alt_devno
= devno
;
469 /* allow n.15/16 for devices attached to host port */
470 if (ata_is_host_link(dev
->link
))
473 for (i
= 0; i
< ata_force_tbl_size
; i
++) {
474 const struct ata_force_ent
*fe
= &ata_force_tbl
[i
];
476 if (fe
->port
!= -1 && fe
->port
!= dev
->link
->ap
->print_id
)
479 if (fe
->device
!= -1 && fe
->device
!= devno
&&
480 fe
->device
!= alt_devno
)
483 if (!(~dev
->horkage
& fe
->param
.horkage_on
) &&
484 !(dev
->horkage
& fe
->param
.horkage_off
))
487 dev
->horkage
|= fe
->param
.horkage_on
;
488 dev
->horkage
&= ~fe
->param
.horkage_off
;
490 ata_dev_notice(dev
, "FORCE: horkage modified (%s)\n",
496 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
497 * @opcode: SCSI opcode
499 * Determine ATAPI command type from @opcode.
505 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
507 int atapi_cmd_type(u8 opcode
)
516 case GPCMD_WRITE_AND_VERIFY_10
:
520 case GPCMD_READ_CD_MSF
:
521 return ATAPI_READ_CD
;
525 if (atapi_passthru16
)
526 return ATAPI_PASS_THRU
;
534 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
535 * @tf: Taskfile to convert
536 * @pmp: Port multiplier port
537 * @is_cmd: This FIS is for command
538 * @fis: Buffer into which data will output
540 * Converts a standard ATA taskfile to a Serial ATA
541 * FIS structure (Register - Host to Device).
544 * Inherited from caller.
546 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8 pmp
, int is_cmd
, u8
*fis
)
548 fis
[0] = 0x27; /* Register - Host to Device FIS */
549 fis
[1] = pmp
& 0xf; /* Port multiplier number*/
551 fis
[1] |= (1 << 7); /* bit 7 indicates Command FIS */
553 fis
[2] = tf
->command
;
554 fis
[3] = tf
->feature
;
561 fis
[8] = tf
->hob_lbal
;
562 fis
[9] = tf
->hob_lbam
;
563 fis
[10] = tf
->hob_lbah
;
564 fis
[11] = tf
->hob_feature
;
567 fis
[13] = tf
->hob_nsect
;
578 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
579 * @fis: Buffer from which data will be input
580 * @tf: Taskfile to output
582 * Converts a serial ATA FIS structure to a standard ATA taskfile.
585 * Inherited from caller.
588 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
590 tf
->command
= fis
[2]; /* status */
591 tf
->feature
= fis
[3]; /* error */
598 tf
->hob_lbal
= fis
[8];
599 tf
->hob_lbam
= fis
[9];
600 tf
->hob_lbah
= fis
[10];
603 tf
->hob_nsect
= fis
[13];
606 static const u8 ata_rw_cmds
[] = {
610 ATA_CMD_READ_MULTI_EXT
,
611 ATA_CMD_WRITE_MULTI_EXT
,
615 ATA_CMD_WRITE_MULTI_FUA_EXT
,
619 ATA_CMD_PIO_READ_EXT
,
620 ATA_CMD_PIO_WRITE_EXT
,
633 ATA_CMD_WRITE_FUA_EXT
637 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
638 * @tf: command to examine and configure
639 * @dev: device tf belongs to
641 * Examine the device configuration and tf->flags to calculate
642 * the proper read/write commands and protocol to use.
647 static int ata_rwcmd_protocol(struct ata_taskfile
*tf
, struct ata_device
*dev
)
651 int index
, fua
, lba48
, write
;
653 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
654 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
655 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
657 if (dev
->flags
& ATA_DFLAG_PIO
) {
658 tf
->protocol
= ATA_PROT_PIO
;
659 index
= dev
->multi_count
? 0 : 8;
660 } else if (lba48
&& (dev
->link
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
661 /* Unable to use DMA due to host limitation */
662 tf
->protocol
= ATA_PROT_PIO
;
663 index
= dev
->multi_count
? 0 : 8;
665 tf
->protocol
= ATA_PROT_DMA
;
669 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
678 * ata_tf_read_block - Read block address from ATA taskfile
679 * @tf: ATA taskfile of interest
680 * @dev: ATA device @tf belongs to
685 * Read block address from @tf. This function can handle all
686 * three address formats - LBA, LBA48 and CHS. tf->protocol and
687 * flags select the address format to use.
690 * Block address read from @tf.
692 u64
ata_tf_read_block(struct ata_taskfile
*tf
, struct ata_device
*dev
)
696 if (tf
->flags
& ATA_TFLAG_LBA
) {
697 if (tf
->flags
& ATA_TFLAG_LBA48
) {
698 block
|= (u64
)tf
->hob_lbah
<< 40;
699 block
|= (u64
)tf
->hob_lbam
<< 32;
700 block
|= (u64
)tf
->hob_lbal
<< 24;
702 block
|= (tf
->device
& 0xf) << 24;
704 block
|= tf
->lbah
<< 16;
705 block
|= tf
->lbam
<< 8;
710 cyl
= tf
->lbam
| (tf
->lbah
<< 8);
711 head
= tf
->device
& 0xf;
716 "device reported invalid CHS sector 0\n");
717 sect
= 1; /* oh well */
720 block
= (cyl
* dev
->heads
+ head
) * dev
->sectors
+ sect
- 1;
727 * ata_build_rw_tf - Build ATA taskfile for given read/write request
728 * @tf: Target ATA taskfile
729 * @dev: ATA device @tf belongs to
730 * @block: Block address
731 * @n_block: Number of blocks
732 * @tf_flags: RW/FUA etc...
738 * Build ATA taskfile @tf for read/write request described by
739 * @block, @n_block, @tf_flags and @tag on @dev.
743 * 0 on success, -ERANGE if the request is too large for @dev,
744 * -EINVAL if the request is invalid.
746 int ata_build_rw_tf(struct ata_taskfile
*tf
, struct ata_device
*dev
,
747 u64 block
, u32 n_block
, unsigned int tf_flags
,
750 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
751 tf
->flags
|= tf_flags
;
753 if (ata_ncq_enabled(dev
) && likely(tag
!= ATA_TAG_INTERNAL
)) {
755 if (!lba_48_ok(block
, n_block
))
758 tf
->protocol
= ATA_PROT_NCQ
;
759 tf
->flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
761 if (tf
->flags
& ATA_TFLAG_WRITE
)
762 tf
->command
= ATA_CMD_FPDMA_WRITE
;
764 tf
->command
= ATA_CMD_FPDMA_READ
;
766 tf
->nsect
= tag
<< 3;
767 tf
->hob_feature
= (n_block
>> 8) & 0xff;
768 tf
->feature
= n_block
& 0xff;
770 tf
->hob_lbah
= (block
>> 40) & 0xff;
771 tf
->hob_lbam
= (block
>> 32) & 0xff;
772 tf
->hob_lbal
= (block
>> 24) & 0xff;
773 tf
->lbah
= (block
>> 16) & 0xff;
774 tf
->lbam
= (block
>> 8) & 0xff;
775 tf
->lbal
= block
& 0xff;
778 if (tf
->flags
& ATA_TFLAG_FUA
)
779 tf
->device
|= 1 << 7;
780 } else if (dev
->flags
& ATA_DFLAG_LBA
) {
781 tf
->flags
|= ATA_TFLAG_LBA
;
783 if (lba_28_ok(block
, n_block
)) {
785 tf
->device
|= (block
>> 24) & 0xf;
786 } else if (lba_48_ok(block
, n_block
)) {
787 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
791 tf
->flags
|= ATA_TFLAG_LBA48
;
793 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
795 tf
->hob_lbah
= (block
>> 40) & 0xff;
796 tf
->hob_lbam
= (block
>> 32) & 0xff;
797 tf
->hob_lbal
= (block
>> 24) & 0xff;
799 /* request too large even for LBA48 */
802 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
805 tf
->nsect
= n_block
& 0xff;
807 tf
->lbah
= (block
>> 16) & 0xff;
808 tf
->lbam
= (block
>> 8) & 0xff;
809 tf
->lbal
= block
& 0xff;
811 tf
->device
|= ATA_LBA
;
814 u32 sect
, head
, cyl
, track
;
816 /* The request -may- be too large for CHS addressing. */
817 if (!lba_28_ok(block
, n_block
))
820 if (unlikely(ata_rwcmd_protocol(tf
, dev
) < 0))
823 /* Convert LBA to CHS */
824 track
= (u32
)block
/ dev
->sectors
;
825 cyl
= track
/ dev
->heads
;
826 head
= track
% dev
->heads
;
827 sect
= (u32
)block
% dev
->sectors
+ 1;
829 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
830 (u32
)block
, track
, cyl
, head
, sect
);
832 /* Check whether the converted CHS can fit.
836 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
839 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
850 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
851 * @pio_mask: pio_mask
852 * @mwdma_mask: mwdma_mask
853 * @udma_mask: udma_mask
855 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
856 * unsigned int xfer_mask.
864 unsigned long ata_pack_xfermask(unsigned long pio_mask
,
865 unsigned long mwdma_mask
,
866 unsigned long udma_mask
)
868 return ((pio_mask
<< ATA_SHIFT_PIO
) & ATA_MASK_PIO
) |
869 ((mwdma_mask
<< ATA_SHIFT_MWDMA
) & ATA_MASK_MWDMA
) |
870 ((udma_mask
<< ATA_SHIFT_UDMA
) & ATA_MASK_UDMA
);
874 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
875 * @xfer_mask: xfer_mask to unpack
876 * @pio_mask: resulting pio_mask
877 * @mwdma_mask: resulting mwdma_mask
878 * @udma_mask: resulting udma_mask
880 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
881 * Any NULL distination masks will be ignored.
883 void ata_unpack_xfermask(unsigned long xfer_mask
, unsigned long *pio_mask
,
884 unsigned long *mwdma_mask
, unsigned long *udma_mask
)
887 *pio_mask
= (xfer_mask
& ATA_MASK_PIO
) >> ATA_SHIFT_PIO
;
889 *mwdma_mask
= (xfer_mask
& ATA_MASK_MWDMA
) >> ATA_SHIFT_MWDMA
;
891 *udma_mask
= (xfer_mask
& ATA_MASK_UDMA
) >> ATA_SHIFT_UDMA
;
894 static const struct ata_xfer_ent
{
898 { ATA_SHIFT_PIO
, ATA_NR_PIO_MODES
, XFER_PIO_0
},
899 { ATA_SHIFT_MWDMA
, ATA_NR_MWDMA_MODES
, XFER_MW_DMA_0
},
900 { ATA_SHIFT_UDMA
, ATA_NR_UDMA_MODES
, XFER_UDMA_0
},
905 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
906 * @xfer_mask: xfer_mask of interest
908 * Return matching XFER_* value for @xfer_mask. Only the highest
909 * bit of @xfer_mask is considered.
915 * Matching XFER_* value, 0xff if no match found.
917 u8
ata_xfer_mask2mode(unsigned long xfer_mask
)
919 int highbit
= fls(xfer_mask
) - 1;
920 const struct ata_xfer_ent
*ent
;
922 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
923 if (highbit
>= ent
->shift
&& highbit
< ent
->shift
+ ent
->bits
)
924 return ent
->base
+ highbit
- ent
->shift
;
929 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
930 * @xfer_mode: XFER_* of interest
932 * Return matching xfer_mask for @xfer_mode.
938 * Matching xfer_mask, 0 if no match found.
940 unsigned long ata_xfer_mode2mask(u8 xfer_mode
)
942 const struct ata_xfer_ent
*ent
;
944 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
945 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
946 return ((2 << (ent
->shift
+ xfer_mode
- ent
->base
)) - 1)
947 & ~((1 << ent
->shift
) - 1);
952 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
953 * @xfer_mode: XFER_* of interest
955 * Return matching xfer_shift for @xfer_mode.
961 * Matching xfer_shift, -1 if no match found.
963 int ata_xfer_mode2shift(unsigned long xfer_mode
)
965 const struct ata_xfer_ent
*ent
;
967 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
968 if (xfer_mode
>= ent
->base
&& xfer_mode
< ent
->base
+ ent
->bits
)
974 * ata_mode_string - convert xfer_mask to string
975 * @xfer_mask: mask of bits supported; only highest bit counts.
977 * Determine string which represents the highest speed
978 * (highest bit in @modemask).
984 * Constant C string representing highest speed listed in
985 * @mode_mask, or the constant C string "<n/a>".
987 const char *ata_mode_string(unsigned long xfer_mask
)
989 static const char * const xfer_mode_str
[] = {
1013 highbit
= fls(xfer_mask
) - 1;
1014 if (highbit
>= 0 && highbit
< ARRAY_SIZE(xfer_mode_str
))
1015 return xfer_mode_str
[highbit
];
1019 const char *sata_spd_string(unsigned int spd
)
1021 static const char * const spd_str
[] = {
1027 if (spd
== 0 || (spd
- 1) >= ARRAY_SIZE(spd_str
))
1029 return spd_str
[spd
- 1];
1033 * ata_dev_classify - determine device type based on ATA-spec signature
1034 * @tf: ATA taskfile register set for device to be identified
1036 * Determine from taskfile register contents whether a device is
1037 * ATA or ATAPI, as per "Signature and persistence" section
1038 * of ATA/PI spec (volume 1, sect 5.14).
1044 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1045 * %ATA_DEV_UNKNOWN the event of failure.
1047 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
1049 /* Apple's open source Darwin code hints that some devices only
1050 * put a proper signature into the LBA mid/high registers,
1051 * So, we only check those. It's sufficient for uniqueness.
1053 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1054 * signatures for ATA and ATAPI devices attached on SerialATA,
1055 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1056 * spec has never mentioned about using different signatures
1057 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1058 * Multiplier specification began to use 0x69/0x96 to identify
1059 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1060 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1061 * 0x69/0x96 shortly and described them as reserved for
1064 * We follow the current spec and consider that 0x69/0x96
1065 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1066 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1067 * SEMB signature. This is worked around in
1068 * ata_dev_read_id().
1070 if ((tf
->lbam
== 0) && (tf
->lbah
== 0)) {
1071 DPRINTK("found ATA device by sig\n");
1075 if ((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) {
1076 DPRINTK("found ATAPI device by sig\n");
1077 return ATA_DEV_ATAPI
;
1080 if ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96)) {
1081 DPRINTK("found PMP device by sig\n");
1085 if ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3)) {
1086 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1087 return ATA_DEV_SEMB
;
1090 DPRINTK("unknown device\n");
1091 return ATA_DEV_UNKNOWN
;
1095 * ata_id_string - Convert IDENTIFY DEVICE page into string
1096 * @id: IDENTIFY DEVICE results we will examine
1097 * @s: string into which data is output
1098 * @ofs: offset into identify device page
1099 * @len: length of string to return. must be an even number.
1101 * The strings in the IDENTIFY DEVICE page are broken up into
1102 * 16-bit chunks. Run through the string, and output each
1103 * 8-bit chunk linearly, regardless of platform.
1109 void ata_id_string(const u16
*id
, unsigned char *s
,
1110 unsigned int ofs
, unsigned int len
)
1131 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1132 * @id: IDENTIFY DEVICE results we will examine
1133 * @s: string into which data is output
1134 * @ofs: offset into identify device page
1135 * @len: length of string to return. must be an odd number.
1137 * This function is identical to ata_id_string except that it
1138 * trims trailing spaces and terminates the resulting string with
1139 * null. @len must be actual maximum length (even number) + 1.
1144 void ata_id_c_string(const u16
*id
, unsigned char *s
,
1145 unsigned int ofs
, unsigned int len
)
1149 ata_id_string(id
, s
, ofs
, len
- 1);
1151 p
= s
+ strnlen(s
, len
- 1);
1152 while (p
> s
&& p
[-1] == ' ')
1157 static u64
ata_id_n_sectors(const u16
*id
)
1159 if (ata_id_has_lba(id
)) {
1160 if (ata_id_has_lba48(id
))
1161 return ata_id_u64(id
, ATA_ID_LBA_CAPACITY_2
);
1163 return ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
1165 if (ata_id_current_chs_valid(id
))
1166 return id
[ATA_ID_CUR_CYLS
] * id
[ATA_ID_CUR_HEADS
] *
1167 id
[ATA_ID_CUR_SECTORS
];
1169 return id
[ATA_ID_CYLS
] * id
[ATA_ID_HEADS
] *
1174 u64
ata_tf_to_lba48(const struct ata_taskfile
*tf
)
1178 sectors
|= ((u64
)(tf
->hob_lbah
& 0xff)) << 40;
1179 sectors
|= ((u64
)(tf
->hob_lbam
& 0xff)) << 32;
1180 sectors
|= ((u64
)(tf
->hob_lbal
& 0xff)) << 24;
1181 sectors
|= (tf
->lbah
& 0xff) << 16;
1182 sectors
|= (tf
->lbam
& 0xff) << 8;
1183 sectors
|= (tf
->lbal
& 0xff);
1188 u64
ata_tf_to_lba(const struct ata_taskfile
*tf
)
1192 sectors
|= (tf
->device
& 0x0f) << 24;
1193 sectors
|= (tf
->lbah
& 0xff) << 16;
1194 sectors
|= (tf
->lbam
& 0xff) << 8;
1195 sectors
|= (tf
->lbal
& 0xff);
1201 * ata_read_native_max_address - Read native max address
1202 * @dev: target device
1203 * @max_sectors: out parameter for the result native max address
1205 * Perform an LBA48 or LBA28 native size query upon the device in
1209 * 0 on success, -EACCES if command is aborted by the drive.
1210 * -EIO on other errors.
1212 static int ata_read_native_max_address(struct ata_device
*dev
, u64
*max_sectors
)
1214 unsigned int err_mask
;
1215 struct ata_taskfile tf
;
1216 int lba48
= ata_id_has_lba48(dev
->id
);
1218 ata_tf_init(dev
, &tf
);
1220 /* always clear all address registers */
1221 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1224 tf
.command
= ATA_CMD_READ_NATIVE_MAX_EXT
;
1225 tf
.flags
|= ATA_TFLAG_LBA48
;
1227 tf
.command
= ATA_CMD_READ_NATIVE_MAX
;
1229 tf
.protocol
|= ATA_PROT_NODATA
;
1230 tf
.device
|= ATA_LBA
;
1232 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1235 "failed to read native max address (err_mask=0x%x)\n",
1237 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
1243 *max_sectors
= ata_tf_to_lba48(&tf
) + 1;
1245 *max_sectors
= ata_tf_to_lba(&tf
) + 1;
1246 if (dev
->horkage
& ATA_HORKAGE_HPA_SIZE
)
1252 * ata_set_max_sectors - Set max sectors
1253 * @dev: target device
1254 * @new_sectors: new max sectors value to set for the device
1256 * Set max sectors of @dev to @new_sectors.
1259 * 0 on success, -EACCES if command is aborted or denied (due to
1260 * previous non-volatile SET_MAX) by the drive. -EIO on other
1263 static int ata_set_max_sectors(struct ata_device
*dev
, u64 new_sectors
)
1265 unsigned int err_mask
;
1266 struct ata_taskfile tf
;
1267 int lba48
= ata_id_has_lba48(dev
->id
);
1271 ata_tf_init(dev
, &tf
);
1273 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1276 tf
.command
= ATA_CMD_SET_MAX_EXT
;
1277 tf
.flags
|= ATA_TFLAG_LBA48
;
1279 tf
.hob_lbal
= (new_sectors
>> 24) & 0xff;
1280 tf
.hob_lbam
= (new_sectors
>> 32) & 0xff;
1281 tf
.hob_lbah
= (new_sectors
>> 40) & 0xff;
1283 tf
.command
= ATA_CMD_SET_MAX
;
1285 tf
.device
|= (new_sectors
>> 24) & 0xf;
1288 tf
.protocol
|= ATA_PROT_NODATA
;
1289 tf
.device
|= ATA_LBA
;
1291 tf
.lbal
= (new_sectors
>> 0) & 0xff;
1292 tf
.lbam
= (new_sectors
>> 8) & 0xff;
1293 tf
.lbah
= (new_sectors
>> 16) & 0xff;
1295 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1298 "failed to set max address (err_mask=0x%x)\n",
1300 if (err_mask
== AC_ERR_DEV
&&
1301 (tf
.feature
& (ATA_ABORTED
| ATA_IDNF
)))
1310 * ata_hpa_resize - Resize a device with an HPA set
1311 * @dev: Device to resize
1313 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1314 * it if required to the full size of the media. The caller must check
1315 * the drive has the HPA feature set enabled.
1318 * 0 on success, -errno on failure.
1320 static int ata_hpa_resize(struct ata_device
*dev
)
1322 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
1323 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
1324 bool unlock_hpa
= ata_ignore_hpa
|| dev
->flags
& ATA_DFLAG_UNLOCK_HPA
;
1325 u64 sectors
= ata_id_n_sectors(dev
->id
);
1329 /* do we need to do it? */
1330 if (dev
->class != ATA_DEV_ATA
||
1331 !ata_id_has_lba(dev
->id
) || !ata_id_hpa_enabled(dev
->id
) ||
1332 (dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
))
1335 /* read native max address */
1336 rc
= ata_read_native_max_address(dev
, &native_sectors
);
1338 /* If device aborted the command or HPA isn't going to
1339 * be unlocked, skip HPA resizing.
1341 if (rc
== -EACCES
|| !unlock_hpa
) {
1343 "HPA support seems broken, skipping HPA handling\n");
1344 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1346 /* we can continue if device aborted the command */
1353 dev
->n_native_sectors
= native_sectors
;
1355 /* nothing to do? */
1356 if (native_sectors
<= sectors
|| !unlock_hpa
) {
1357 if (!print_info
|| native_sectors
== sectors
)
1360 if (native_sectors
> sectors
)
1362 "HPA detected: current %llu, native %llu\n",
1363 (unsigned long long)sectors
,
1364 (unsigned long long)native_sectors
);
1365 else if (native_sectors
< sectors
)
1367 "native sectors (%llu) is smaller than sectors (%llu)\n",
1368 (unsigned long long)native_sectors
,
1369 (unsigned long long)sectors
);
1373 /* let's unlock HPA */
1374 rc
= ata_set_max_sectors(dev
, native_sectors
);
1375 if (rc
== -EACCES
) {
1376 /* if device aborted the command, skip HPA resizing */
1378 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1379 (unsigned long long)sectors
,
1380 (unsigned long long)native_sectors
);
1381 dev
->horkage
|= ATA_HORKAGE_BROKEN_HPA
;
1386 /* re-read IDENTIFY data */
1387 rc
= ata_dev_reread_id(dev
, 0);
1390 "failed to re-read IDENTIFY data after HPA resizing\n");
1395 u64 new_sectors
= ata_id_n_sectors(dev
->id
);
1397 "HPA unlocked: %llu -> %llu, native %llu\n",
1398 (unsigned long long)sectors
,
1399 (unsigned long long)new_sectors
,
1400 (unsigned long long)native_sectors
);
1407 * ata_dump_id - IDENTIFY DEVICE info debugging output
1408 * @id: IDENTIFY DEVICE page to dump
1410 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1417 static inline void ata_dump_id(const u16
*id
)
1419 DPRINTK("49==0x%04x "
1429 DPRINTK("80==0x%04x "
1439 DPRINTK("88==0x%04x "
1446 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1447 * @id: IDENTIFY data to compute xfer mask from
1449 * Compute the xfermask for this device. This is not as trivial
1450 * as it seems if we must consider early devices correctly.
1452 * FIXME: pre IDE drive timing (do we care ?).
1460 unsigned long ata_id_xfermask(const u16
*id
)
1462 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
1464 /* Usual case. Word 53 indicates word 64 is valid */
1465 if (id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1466 pio_mask
= id
[ATA_ID_PIO_MODES
] & 0x03;
1470 /* If word 64 isn't valid then Word 51 high byte holds
1471 * the PIO timing number for the maximum. Turn it into
1474 u8 mode
= (id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF;
1475 if (mode
< 5) /* Valid PIO range */
1476 pio_mask
= (2 << mode
) - 1;
1480 /* But wait.. there's more. Design your standards by
1481 * committee and you too can get a free iordy field to
1482 * process. However its the speeds not the modes that
1483 * are supported... Note drivers using the timing API
1484 * will get this right anyway
1488 mwdma_mask
= id
[ATA_ID_MWDMA_MODES
] & 0x07;
1490 if (ata_id_is_cfa(id
)) {
1492 * Process compact flash extended modes
1494 int pio
= (id
[ATA_ID_CFA_MODES
] >> 0) & 0x7;
1495 int dma
= (id
[ATA_ID_CFA_MODES
] >> 3) & 0x7;
1498 pio_mask
|= (1 << 5);
1500 pio_mask
|= (1 << 6);
1502 mwdma_mask
|= (1 << 3);
1504 mwdma_mask
|= (1 << 4);
1508 if (id
[ATA_ID_FIELD_VALID
] & (1 << 2))
1509 udma_mask
= id
[ATA_ID_UDMA_MODES
] & 0xff;
1511 return ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
1514 static void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1516 struct completion
*waiting
= qc
->private_data
;
1522 * ata_exec_internal_sg - execute libata internal command
1523 * @dev: Device to which the command is sent
1524 * @tf: Taskfile registers for the command and the result
1525 * @cdb: CDB for packet command
1526 * @dma_dir: Data tranfer direction of the command
1527 * @sgl: sg list for the data buffer of the command
1528 * @n_elem: Number of sg entries
1529 * @timeout: Timeout in msecs (0 for default)
1531 * Executes libata internal command with timeout. @tf contains
1532 * command on entry and result on return. Timeout and error
1533 * conditions are reported via return value. No recovery action
1534 * is taken after a command times out. It's caller's duty to
1535 * clean up after timeout.
1538 * None. Should be called with kernel context, might sleep.
1541 * Zero on success, AC_ERR_* mask on failure
1543 unsigned ata_exec_internal_sg(struct ata_device
*dev
,
1544 struct ata_taskfile
*tf
, const u8
*cdb
,
1545 int dma_dir
, struct scatterlist
*sgl
,
1546 unsigned int n_elem
, unsigned long timeout
)
1548 struct ata_link
*link
= dev
->link
;
1549 struct ata_port
*ap
= link
->ap
;
1550 u8 command
= tf
->command
;
1551 int auto_timeout
= 0;
1552 struct ata_queued_cmd
*qc
;
1553 unsigned int tag
, preempted_tag
;
1554 u32 preempted_sactive
, preempted_qc_active
;
1555 int preempted_nr_active_links
;
1556 DECLARE_COMPLETION_ONSTACK(wait
);
1557 unsigned long flags
;
1558 unsigned int err_mask
;
1561 spin_lock_irqsave(ap
->lock
, flags
);
1563 /* no internal command while frozen */
1564 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
1565 spin_unlock_irqrestore(ap
->lock
, flags
);
1566 return AC_ERR_SYSTEM
;
1569 /* initialize internal qc */
1571 /* XXX: Tag 0 is used for drivers with legacy EH as some
1572 * drivers choke if any other tag is given. This breaks
1573 * ata_tag_internal() test for those drivers. Don't use new
1574 * EH stuff without converting to it.
1576 if (ap
->ops
->error_handler
)
1577 tag
= ATA_TAG_INTERNAL
;
1581 if (test_and_set_bit(tag
, &ap
->qc_allocated
))
1583 qc
= __ata_qc_from_tag(ap
, tag
);
1591 preempted_tag
= link
->active_tag
;
1592 preempted_sactive
= link
->sactive
;
1593 preempted_qc_active
= ap
->qc_active
;
1594 preempted_nr_active_links
= ap
->nr_active_links
;
1595 link
->active_tag
= ATA_TAG_POISON
;
1598 ap
->nr_active_links
= 0;
1600 /* prepare & issue qc */
1603 memcpy(qc
->cdb
, cdb
, ATAPI_CDB_LEN
);
1604 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
1605 qc
->dma_dir
= dma_dir
;
1606 if (dma_dir
!= DMA_NONE
) {
1607 unsigned int i
, buflen
= 0;
1608 struct scatterlist
*sg
;
1610 for_each_sg(sgl
, sg
, n_elem
, i
)
1611 buflen
+= sg
->length
;
1613 ata_sg_init(qc
, sgl
, n_elem
);
1614 qc
->nbytes
= buflen
;
1617 qc
->private_data
= &wait
;
1618 qc
->complete_fn
= ata_qc_complete_internal
;
1622 spin_unlock_irqrestore(ap
->lock
, flags
);
1625 if (ata_probe_timeout
)
1626 timeout
= ata_probe_timeout
* 1000;
1628 timeout
= ata_internal_cmd_timeout(dev
, command
);
1633 if (ap
->ops
->error_handler
)
1636 rc
= wait_for_completion_timeout(&wait
, msecs_to_jiffies(timeout
));
1638 if (ap
->ops
->error_handler
)
1641 ata_sff_flush_pio_task(ap
);
1644 spin_lock_irqsave(ap
->lock
, flags
);
1646 /* We're racing with irq here. If we lose, the
1647 * following test prevents us from completing the qc
1648 * twice. If we win, the port is frozen and will be
1649 * cleaned up by ->post_internal_cmd().
1651 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1652 qc
->err_mask
|= AC_ERR_TIMEOUT
;
1654 if (ap
->ops
->error_handler
)
1655 ata_port_freeze(ap
);
1657 ata_qc_complete(qc
);
1659 if (ata_msg_warn(ap
))
1660 ata_dev_warn(dev
, "qc timeout (cmd 0x%x)\n",
1664 spin_unlock_irqrestore(ap
->lock
, flags
);
1667 /* do post_internal_cmd */
1668 if (ap
->ops
->post_internal_cmd
)
1669 ap
->ops
->post_internal_cmd(qc
);
1671 /* perform minimal error analysis */
1672 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1673 if (qc
->result_tf
.command
& (ATA_ERR
| ATA_DF
))
1674 qc
->err_mask
|= AC_ERR_DEV
;
1677 qc
->err_mask
|= AC_ERR_OTHER
;
1679 if (qc
->err_mask
& ~AC_ERR_OTHER
)
1680 qc
->err_mask
&= ~AC_ERR_OTHER
;
1684 spin_lock_irqsave(ap
->lock
, flags
);
1686 *tf
= qc
->result_tf
;
1687 err_mask
= qc
->err_mask
;
1690 link
->active_tag
= preempted_tag
;
1691 link
->sactive
= preempted_sactive
;
1692 ap
->qc_active
= preempted_qc_active
;
1693 ap
->nr_active_links
= preempted_nr_active_links
;
1695 spin_unlock_irqrestore(ap
->lock
, flags
);
1697 if ((err_mask
& AC_ERR_TIMEOUT
) && auto_timeout
)
1698 ata_internal_cmd_timed_out(dev
, command
);
1704 * ata_exec_internal - execute libata internal command
1705 * @dev: Device to which the command is sent
1706 * @tf: Taskfile registers for the command and the result
1707 * @cdb: CDB for packet command
1708 * @dma_dir: Data tranfer direction of the command
1709 * @buf: Data buffer of the command
1710 * @buflen: Length of data buffer
1711 * @timeout: Timeout in msecs (0 for default)
1713 * Wrapper around ata_exec_internal_sg() which takes simple
1714 * buffer instead of sg list.
1717 * None. Should be called with kernel context, might sleep.
1720 * Zero on success, AC_ERR_* mask on failure
1722 unsigned ata_exec_internal(struct ata_device
*dev
,
1723 struct ata_taskfile
*tf
, const u8
*cdb
,
1724 int dma_dir
, void *buf
, unsigned int buflen
,
1725 unsigned long timeout
)
1727 struct scatterlist
*psg
= NULL
, sg
;
1728 unsigned int n_elem
= 0;
1730 if (dma_dir
!= DMA_NONE
) {
1732 sg_init_one(&sg
, buf
, buflen
);
1737 return ata_exec_internal_sg(dev
, tf
, cdb
, dma_dir
, psg
, n_elem
,
1742 * ata_do_simple_cmd - execute simple internal command
1743 * @dev: Device to which the command is sent
1744 * @cmd: Opcode to execute
1746 * Execute a 'simple' command, that only consists of the opcode
1747 * 'cmd' itself, without filling any other registers
1750 * Kernel thread context (may sleep).
1753 * Zero on success, AC_ERR_* mask on failure
1755 unsigned int ata_do_simple_cmd(struct ata_device
*dev
, u8 cmd
)
1757 struct ata_taskfile tf
;
1759 ata_tf_init(dev
, &tf
);
1762 tf
.flags
|= ATA_TFLAG_DEVICE
;
1763 tf
.protocol
= ATA_PROT_NODATA
;
1765 return ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1769 * ata_pio_need_iordy - check if iordy needed
1772 * Check if the current speed of the device requires IORDY. Used
1773 * by various controllers for chip configuration.
1775 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1777 /* Don't set IORDY if we're preparing for reset. IORDY may
1778 * lead to controller lock up on certain controllers if the
1779 * port is not occupied. See bko#11703 for details.
1781 if (adev
->link
->ap
->pflags
& ATA_PFLAG_RESETTING
)
1783 /* Controller doesn't support IORDY. Probably a pointless
1784 * check as the caller should know this.
1786 if (adev
->link
->ap
->flags
& ATA_FLAG_NO_IORDY
)
1788 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1789 if (ata_id_is_cfa(adev
->id
)
1790 && (adev
->pio_mode
== XFER_PIO_5
|| adev
->pio_mode
== XFER_PIO_6
))
1792 /* PIO3 and higher it is mandatory */
1793 if (adev
->pio_mode
> XFER_PIO_2
)
1795 /* We turn it on when possible */
1796 if (ata_id_has_iordy(adev
->id
))
1802 * ata_pio_mask_no_iordy - Return the non IORDY mask
1805 * Compute the highest mode possible if we are not using iordy. Return
1806 * -1 if no iordy mode is available.
1808 static u32
ata_pio_mask_no_iordy(const struct ata_device
*adev
)
1810 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1811 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1812 u16 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1813 /* Is the speed faster than the drive allows non IORDY ? */
1815 /* This is cycle times not frequency - watch the logic! */
1816 if (pio
> 240) /* PIO2 is 240nS per cycle */
1817 return 3 << ATA_SHIFT_PIO
;
1818 return 7 << ATA_SHIFT_PIO
;
1821 return 3 << ATA_SHIFT_PIO
;
1825 * ata_do_dev_read_id - default ID read method
1827 * @tf: proposed taskfile
1830 * Issue the identify taskfile and hand back the buffer containing
1831 * identify data. For some RAID controllers and for pre ATA devices
1832 * this function is wrapped or replaced by the driver
1834 unsigned int ata_do_dev_read_id(struct ata_device
*dev
,
1835 struct ata_taskfile
*tf
, u16
*id
)
1837 return ata_exec_internal(dev
, tf
, NULL
, DMA_FROM_DEVICE
,
1838 id
, sizeof(id
[0]) * ATA_ID_WORDS
, 0);
1842 * ata_dev_read_id - Read ID data from the specified device
1843 * @dev: target device
1844 * @p_class: pointer to class of the target device (may be changed)
1845 * @flags: ATA_READID_* flags
1846 * @id: buffer to read IDENTIFY data into
1848 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1849 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1850 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1851 * for pre-ATA4 drives.
1853 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1854 * now we abort if we hit that case.
1857 * Kernel thread context (may sleep)
1860 * 0 on success, -errno otherwise.
1862 int ata_dev_read_id(struct ata_device
*dev
, unsigned int *p_class
,
1863 unsigned int flags
, u16
*id
)
1865 struct ata_port
*ap
= dev
->link
->ap
;
1866 unsigned int class = *p_class
;
1867 struct ata_taskfile tf
;
1868 unsigned int err_mask
= 0;
1870 bool is_semb
= class == ATA_DEV_SEMB
;
1871 int may_fallback
= 1, tried_spinup
= 0;
1874 if (ata_msg_ctl(ap
))
1875 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
1878 ata_tf_init(dev
, &tf
);
1882 class = ATA_DEV_ATA
; /* some hard drives report SEMB sig */
1884 tf
.command
= ATA_CMD_ID_ATA
;
1887 tf
.command
= ATA_CMD_ID_ATAPI
;
1891 reason
= "unsupported class";
1895 tf
.protocol
= ATA_PROT_PIO
;
1897 /* Some devices choke if TF registers contain garbage. Make
1898 * sure those are properly initialized.
1900 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1902 /* Device presence detection is unreliable on some
1903 * controllers. Always poll IDENTIFY if available.
1905 tf
.flags
|= ATA_TFLAG_POLLING
;
1907 if (ap
->ops
->read_id
)
1908 err_mask
= ap
->ops
->read_id(dev
, &tf
, id
);
1910 err_mask
= ata_do_dev_read_id(dev
, &tf
, id
);
1913 if (err_mask
& AC_ERR_NODEV_HINT
) {
1914 ata_dev_dbg(dev
, "NODEV after polling detection\n");
1920 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1921 /* SEMB is not supported yet */
1922 *p_class
= ATA_DEV_SEMB_UNSUP
;
1926 if ((err_mask
== AC_ERR_DEV
) && (tf
.feature
& ATA_ABORTED
)) {
1927 /* Device or controller might have reported
1928 * the wrong device class. Give a shot at the
1929 * other IDENTIFY if the current one is
1930 * aborted by the device.
1935 if (class == ATA_DEV_ATA
)
1936 class = ATA_DEV_ATAPI
;
1938 class = ATA_DEV_ATA
;
1942 /* Control reaches here iff the device aborted
1943 * both flavors of IDENTIFYs which happens
1944 * sometimes with phantom devices.
1947 "both IDENTIFYs aborted, assuming NODEV\n");
1952 reason
= "I/O error";
1956 if (dev
->horkage
& ATA_HORKAGE_DUMP_ID
) {
1957 ata_dev_dbg(dev
, "dumping IDENTIFY data, "
1958 "class=%d may_fallback=%d tried_spinup=%d\n",
1959 class, may_fallback
, tried_spinup
);
1960 print_hex_dump(KERN_DEBUG
, "", DUMP_PREFIX_OFFSET
,
1961 16, 2, id
, ATA_ID_WORDS
* sizeof(*id
), true);
1964 /* Falling back doesn't make sense if ID data was read
1965 * successfully at least once.
1969 swap_buf_le16(id
, ATA_ID_WORDS
);
1973 reason
= "device reports invalid type";
1975 if (class == ATA_DEV_ATA
) {
1976 if (!ata_id_is_ata(id
) && !ata_id_is_cfa(id
))
1978 if (ap
->host
->flags
& ATA_HOST_IGNORE_ATA
&&
1979 ata_id_is_ata(id
)) {
1981 "host indicates ignore ATA devices, ignored\n");
1985 if (ata_id_is_ata(id
))
1989 if (!tried_spinup
&& (id
[2] == 0x37c8 || id
[2] == 0x738c)) {
1992 * Drive powered-up in standby mode, and requires a specific
1993 * SET_FEATURES spin-up subcommand before it will accept
1994 * anything other than the original IDENTIFY command.
1996 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SPINUP
, 0);
1997 if (err_mask
&& id
[2] != 0x738c) {
1999 reason
= "SPINUP failed";
2003 * If the drive initially returned incomplete IDENTIFY info,
2004 * we now must reissue the IDENTIFY command.
2006 if (id
[2] == 0x37c8)
2010 if ((flags
& ATA_READID_POSTRESET
) && class == ATA_DEV_ATA
) {
2012 * The exact sequence expected by certain pre-ATA4 drives is:
2014 * IDENTIFY (optional in early ATA)
2015 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2017 * Some drives were very specific about that exact sequence.
2019 * Note that ATA4 says lba is mandatory so the second check
2020 * should never trigger.
2022 if (ata_id_major_version(id
) < 4 || !ata_id_has_lba(id
)) {
2023 err_mask
= ata_dev_init_params(dev
, id
[3], id
[6]);
2026 reason
= "INIT_DEV_PARAMS failed";
2030 /* current CHS translation info (id[53-58]) might be
2031 * changed. reread the identify device info.
2033 flags
&= ~ATA_READID_POSTRESET
;
2043 if (ata_msg_warn(ap
))
2044 ata_dev_warn(dev
, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2049 static int ata_do_link_spd_horkage(struct ata_device
*dev
)
2051 struct ata_link
*plink
= ata_dev_phys_link(dev
);
2052 u32 target
, target_limit
;
2054 if (!sata_scr_valid(plink
))
2057 if (dev
->horkage
& ATA_HORKAGE_1_5_GBPS
)
2062 target_limit
= (1 << target
) - 1;
2064 /* if already on stricter limit, no need to push further */
2065 if (plink
->sata_spd_limit
<= target_limit
)
2068 plink
->sata_spd_limit
= target_limit
;
2070 /* Request another EH round by returning -EAGAIN if link is
2071 * going faster than the target speed. Forward progress is
2072 * guaranteed by setting sata_spd_limit to target_limit above.
2074 if (plink
->sata_spd
> target
) {
2075 ata_dev_info(dev
, "applying link speed limit horkage to %s\n",
2076 sata_spd_string(target
));
2082 static inline u8
ata_dev_knobble(struct ata_device
*dev
)
2084 struct ata_port
*ap
= dev
->link
->ap
;
2086 if (ata_dev_blacklisted(dev
) & ATA_HORKAGE_BRIDGE_OK
)
2089 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(dev
->id
)));
2092 static int ata_dev_config_ncq(struct ata_device
*dev
,
2093 char *desc
, size_t desc_sz
)
2095 struct ata_port
*ap
= dev
->link
->ap
;
2096 int hdepth
= 0, ddepth
= ata_id_queue_depth(dev
->id
);
2097 unsigned int err_mask
;
2100 if (!ata_id_has_ncq(dev
->id
)) {
2104 if (dev
->horkage
& ATA_HORKAGE_NONCQ
) {
2105 snprintf(desc
, desc_sz
, "NCQ (not used)");
2108 if (ap
->flags
& ATA_FLAG_NCQ
) {
2109 hdepth
= min(ap
->scsi_host
->can_queue
, ATA_MAX_QUEUE
- 1);
2110 dev
->flags
|= ATA_DFLAG_NCQ
;
2113 if (!(dev
->horkage
& ATA_HORKAGE_BROKEN_FPDMA_AA
) &&
2114 (ap
->flags
& ATA_FLAG_FPDMA_AA
) &&
2115 ata_id_has_fpdma_aa(dev
->id
)) {
2116 err_mask
= ata_dev_set_feature(dev
, SETFEATURES_SATA_ENABLE
,
2120 "failed to enable AA (error_mask=0x%x)\n",
2122 if (err_mask
!= AC_ERR_DEV
) {
2123 dev
->horkage
|= ATA_HORKAGE_BROKEN_FPDMA_AA
;
2130 if (hdepth
>= ddepth
)
2131 snprintf(desc
, desc_sz
, "NCQ (depth %d)%s", ddepth
, aa_desc
);
2133 snprintf(desc
, desc_sz
, "NCQ (depth %d/%d)%s", hdepth
,
2139 * ata_dev_configure - Configure the specified ATA/ATAPI device
2140 * @dev: Target device to configure
2142 * Configure @dev according to @dev->id. Generic and low-level
2143 * driver specific fixups are also applied.
2146 * Kernel thread context (may sleep)
2149 * 0 on success, -errno otherwise
2151 int ata_dev_configure(struct ata_device
*dev
)
2153 struct ata_port
*ap
= dev
->link
->ap
;
2154 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
2155 int print_info
= ehc
->i
.flags
& ATA_EHI_PRINTINFO
;
2156 const u16
*id
= dev
->id
;
2157 unsigned long xfer_mask
;
2158 char revbuf
[7]; /* XYZ-99\0 */
2159 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2160 char modelbuf
[ATA_ID_PROD_LEN
+1];
2163 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2164 ata_dev_info(dev
, "%s: ENTER/EXIT -- nodev\n", __func__
);
2168 if (ata_msg_probe(ap
))
2169 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
2172 dev
->horkage
|= ata_dev_blacklisted(dev
);
2173 ata_force_horkage(dev
);
2175 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2176 ata_dev_info(dev
, "unsupported device, disabling\n");
2177 ata_dev_disable(dev
);
2181 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2182 dev
->class == ATA_DEV_ATAPI
) {
2183 ata_dev_warn(dev
, "WARNING: ATAPI is %s, device ignored\n",
2184 atapi_enabled
? "not supported with this driver"
2186 ata_dev_disable(dev
);
2190 rc
= ata_do_link_spd_horkage(dev
);
2194 /* let ACPI work its magic */
2195 rc
= ata_acpi_on_devcfg(dev
);
2199 /* massage HPA, do it early as it might change IDENTIFY data */
2200 rc
= ata_hpa_resize(dev
);
2204 /* print device capabilities */
2205 if (ata_msg_probe(ap
))
2207 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2208 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2210 id
[49], id
[82], id
[83], id
[84],
2211 id
[85], id
[86], id
[87], id
[88]);
2213 /* initialize to-be-configured parameters */
2214 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2215 dev
->max_sectors
= 0;
2221 dev
->multi_count
= 0;
2224 * common ATA, ATAPI feature tests
2227 /* find max transfer mode; for printk only */
2228 xfer_mask
= ata_id_xfermask(id
);
2230 if (ata_msg_probe(ap
))
2233 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2234 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2237 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2240 /* ATA-specific feature tests */
2241 if (dev
->class == ATA_DEV_ATA
) {
2242 if (ata_id_is_cfa(id
)) {
2243 /* CPRM may make this media unusable */
2244 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2246 "supports DRM functions and may not be fully accessible\n");
2247 snprintf(revbuf
, 7, "CFA");
2249 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2250 /* Warn the user if the device has TPM extensions */
2251 if (ata_id_has_tpm(id
))
2253 "supports DRM functions and may not be fully accessible\n");
2256 dev
->n_sectors
= ata_id_n_sectors(id
);
2258 /* get current R/W Multiple count setting */
2259 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2260 unsigned int max
= dev
->id
[47] & 0xff;
2261 unsigned int cnt
= dev
->id
[59] & 0xff;
2262 /* only recognize/allow powers of two here */
2263 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2265 dev
->multi_count
= cnt
;
2268 if (ata_id_has_lba(id
)) {
2269 const char *lba_desc
;
2273 dev
->flags
|= ATA_DFLAG_LBA
;
2274 if (ata_id_has_lba48(id
)) {
2275 dev
->flags
|= ATA_DFLAG_LBA48
;
2278 if (dev
->n_sectors
>= (1UL << 28) &&
2279 ata_id_has_flush_ext(id
))
2280 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2284 rc
= ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2288 /* print device info to dmesg */
2289 if (ata_msg_drv(ap
) && print_info
) {
2290 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2291 revbuf
, modelbuf
, fwrevbuf
,
2292 ata_mode_string(xfer_mask
));
2294 "%llu sectors, multi %u: %s %s\n",
2295 (unsigned long long)dev
->n_sectors
,
2296 dev
->multi_count
, lba_desc
, ncq_desc
);
2301 /* Default translation */
2302 dev
->cylinders
= id
[1];
2304 dev
->sectors
= id
[6];
2306 if (ata_id_current_chs_valid(id
)) {
2307 /* Current CHS translation is valid. */
2308 dev
->cylinders
= id
[54];
2309 dev
->heads
= id
[55];
2310 dev
->sectors
= id
[56];
2313 /* print device info to dmesg */
2314 if (ata_msg_drv(ap
) && print_info
) {
2315 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2316 revbuf
, modelbuf
, fwrevbuf
,
2317 ata_mode_string(xfer_mask
));
2319 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2320 (unsigned long long)dev
->n_sectors
,
2321 dev
->multi_count
, dev
->cylinders
,
2322 dev
->heads
, dev
->sectors
);
2329 /* ATAPI-specific feature tests */
2330 else if (dev
->class == ATA_DEV_ATAPI
) {
2331 const char *cdb_intr_string
= "";
2332 const char *atapi_an_string
= "";
2333 const char *dma_dir_string
= "";
2336 rc
= atapi_cdb_len(id
);
2337 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2338 if (ata_msg_warn(ap
))
2339 ata_dev_warn(dev
, "unsupported CDB len\n");
2343 dev
->cdb_len
= (unsigned int) rc
;
2345 /* Enable ATAPI AN if both the host and device have
2346 * the support. If PMP is attached, SNTF is required
2347 * to enable ATAPI AN to discern between PHY status
2348 * changed notifications and ATAPI ANs.
2351 (ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2352 (!sata_pmp_attached(ap
) ||
2353 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2354 unsigned int err_mask
;
2356 /* issue SET feature command to turn this on */
2357 err_mask
= ata_dev_set_feature(dev
,
2358 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2361 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2364 dev
->flags
|= ATA_DFLAG_AN
;
2365 atapi_an_string
= ", ATAPI AN";
2369 if (ata_id_cdb_intr(dev
->id
)) {
2370 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2371 cdb_intr_string
= ", CDB intr";
2374 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2375 dev
->flags
|= ATA_DFLAG_DMADIR
;
2376 dma_dir_string
= ", DMADIR";
2379 if (ata_id_has_da(dev
->id
))
2380 dev
->flags
|= ATA_DFLAG_DA
;
2382 /* print device info to dmesg */
2383 if (ata_msg_drv(ap
) && print_info
)
2385 "ATAPI: %s, %s, max %s%s%s%s\n",
2387 ata_mode_string(xfer_mask
),
2388 cdb_intr_string
, atapi_an_string
,
2392 /* determine max_sectors */
2393 dev
->max_sectors
= ATA_MAX_SECTORS
;
2394 if (dev
->flags
& ATA_DFLAG_LBA48
)
2395 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2397 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2399 if (ata_dev_knobble(dev
)) {
2400 if (ata_msg_drv(ap
) && print_info
)
2401 ata_dev_info(dev
, "applying bridge limits\n");
2402 dev
->udma_mask
&= ATA_UDMA5
;
2403 dev
->max_sectors
= ATA_MAX_SECTORS
;
2406 if ((dev
->class == ATA_DEV_ATAPI
) &&
2407 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2408 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2409 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2412 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2413 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2416 if (ap
->ops
->dev_config
)
2417 ap
->ops
->dev_config(dev
);
2419 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2420 /* Let the user know. We don't want to disallow opens for
2421 rescue purposes, or in case the vendor is just a blithering
2422 idiot. Do this after the dev_config call as some controllers
2423 with buggy firmware may want to avoid reporting false device
2428 "Drive reports diagnostics failure. This may indicate a drive\n");
2430 "fault or invalid emulation. Contact drive vendor for information.\n");
2434 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2435 ata_dev_warn(dev
, "WARNING: device requires firmware update to be fully functional\n");
2436 ata_dev_warn(dev
, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2442 if (ata_msg_probe(ap
))
2443 ata_dev_dbg(dev
, "%s: EXIT, err\n", __func__
);
2448 * ata_cable_40wire - return 40 wire cable type
2451 * Helper method for drivers which want to hardwire 40 wire cable
2455 int ata_cable_40wire(struct ata_port
*ap
)
2457 return ATA_CBL_PATA40
;
2461 * ata_cable_80wire - return 80 wire cable type
2464 * Helper method for drivers which want to hardwire 80 wire cable
2468 int ata_cable_80wire(struct ata_port
*ap
)
2470 return ATA_CBL_PATA80
;
2474 * ata_cable_unknown - return unknown PATA cable.
2477 * Helper method for drivers which have no PATA cable detection.
2480 int ata_cable_unknown(struct ata_port
*ap
)
2482 return ATA_CBL_PATA_UNK
;
2486 * ata_cable_ignore - return ignored PATA cable.
2489 * Helper method for drivers which don't use cable type to limit
2492 int ata_cable_ignore(struct ata_port
*ap
)
2494 return ATA_CBL_PATA_IGN
;
2498 * ata_cable_sata - return SATA cable type
2501 * Helper method for drivers which have SATA cables
2504 int ata_cable_sata(struct ata_port
*ap
)
2506 return ATA_CBL_SATA
;
2510 * ata_bus_probe - Reset and probe ATA bus
2513 * Master ATA bus probing function. Initiates a hardware-dependent
2514 * bus reset, then attempts to identify any devices found on
2518 * PCI/etc. bus probe sem.
2521 * Zero on success, negative errno otherwise.
2524 int ata_bus_probe(struct ata_port
*ap
)
2526 unsigned int classes
[ATA_MAX_DEVICES
];
2527 int tries
[ATA_MAX_DEVICES
];
2529 struct ata_device
*dev
;
2531 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2532 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2535 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2536 /* If we issue an SRST then an ATA drive (not ATAPI)
2537 * may change configuration and be in PIO0 timing. If
2538 * we do a hard reset (or are coming from power on)
2539 * this is true for ATA or ATAPI. Until we've set a
2540 * suitable controller mode we should not touch the
2541 * bus as we may be talking too fast.
2543 dev
->pio_mode
= XFER_PIO_0
;
2545 /* If the controller has a pio mode setup function
2546 * then use it to set the chipset to rights. Don't
2547 * touch the DMA setup as that will be dealt with when
2548 * configuring devices.
2550 if (ap
->ops
->set_piomode
)
2551 ap
->ops
->set_piomode(ap
, dev
);
2554 /* reset and determine device classes */
2555 ap
->ops
->phy_reset(ap
);
2557 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2558 if (dev
->class != ATA_DEV_UNKNOWN
)
2559 classes
[dev
->devno
] = dev
->class;
2561 classes
[dev
->devno
] = ATA_DEV_NONE
;
2563 dev
->class = ATA_DEV_UNKNOWN
;
2566 /* read IDENTIFY page and configure devices. We have to do the identify
2567 specific sequence bass-ackwards so that PDIAG- is released by
2570 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2571 if (tries
[dev
->devno
])
2572 dev
->class = classes
[dev
->devno
];
2574 if (!ata_dev_enabled(dev
))
2577 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2583 /* Now ask for the cable type as PDIAG- should have been released */
2584 if (ap
->ops
->cable_detect
)
2585 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2587 /* We may have SATA bridge glue hiding here irrespective of
2588 * the reported cable types and sensed types. When SATA
2589 * drives indicate we have a bridge, we don't know which end
2590 * of the link the bridge is which is a problem.
2592 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2593 if (ata_id_is_sata(dev
->id
))
2594 ap
->cbl
= ATA_CBL_SATA
;
2596 /* After the identify sequence we can now set up the devices. We do
2597 this in the normal order so that the user doesn't get confused */
2599 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2600 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2601 rc
= ata_dev_configure(dev
);
2602 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2607 /* configure transfer mode */
2608 rc
= ata_set_mode(&ap
->link
, &dev
);
2612 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2618 tries
[dev
->devno
]--;
2622 /* eeek, something went very wrong, give up */
2623 tries
[dev
->devno
] = 0;
2627 /* give it just one more chance */
2628 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2630 if (tries
[dev
->devno
] == 1) {
2631 /* This is the last chance, better to slow
2632 * down than lose it.
2634 sata_down_spd_limit(&ap
->link
, 0);
2635 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2639 if (!tries
[dev
->devno
])
2640 ata_dev_disable(dev
);
2646 * sata_print_link_status - Print SATA link status
2647 * @link: SATA link to printk link status about
2649 * This function prints link speed and status of a SATA link.
2654 static void sata_print_link_status(struct ata_link
*link
)
2656 u32 sstatus
, scontrol
, tmp
;
2658 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2660 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2662 if (ata_phys_link_online(link
)) {
2663 tmp
= (sstatus
>> 4) & 0xf;
2664 ata_link_info(link
, "SATA link up %s (SStatus %X SControl %X)\n",
2665 sata_spd_string(tmp
), sstatus
, scontrol
);
2667 ata_link_info(link
, "SATA link down (SStatus %X SControl %X)\n",
2673 * ata_dev_pair - return other device on cable
2676 * Obtain the other device on the same cable, or if none is
2677 * present NULL is returned
2680 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2682 struct ata_link
*link
= adev
->link
;
2683 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2684 if (!ata_dev_enabled(pair
))
2690 * sata_down_spd_limit - adjust SATA spd limit downward
2691 * @link: Link to adjust SATA spd limit for
2692 * @spd_limit: Additional limit
2694 * Adjust SATA spd limit of @link downward. Note that this
2695 * function only adjusts the limit. The change must be applied
2696 * using sata_set_spd().
2698 * If @spd_limit is non-zero, the speed is limited to equal to or
2699 * lower than @spd_limit if such speed is supported. If
2700 * @spd_limit is slower than any supported speed, only the lowest
2701 * supported speed is allowed.
2704 * Inherited from caller.
2707 * 0 on success, negative errno on failure
2709 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
2711 u32 sstatus
, spd
, mask
;
2714 if (!sata_scr_valid(link
))
2717 /* If SCR can be read, use it to determine the current SPD.
2718 * If not, use cached value in link->sata_spd.
2720 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2721 if (rc
== 0 && ata_sstatus_online(sstatus
))
2722 spd
= (sstatus
>> 4) & 0xf;
2724 spd
= link
->sata_spd
;
2726 mask
= link
->sata_spd_limit
;
2730 /* unconditionally mask off the highest bit */
2731 bit
= fls(mask
) - 1;
2732 mask
&= ~(1 << bit
);
2734 /* Mask off all speeds higher than or equal to the current
2735 * one. Force 1.5Gbps if current SPD is not available.
2738 mask
&= (1 << (spd
- 1)) - 1;
2742 /* were we already at the bottom? */
2747 if (mask
& ((1 << spd_limit
) - 1))
2748 mask
&= (1 << spd_limit
) - 1;
2750 bit
= ffs(mask
) - 1;
2755 link
->sata_spd_limit
= mask
;
2757 ata_link_warn(link
, "limiting SATA link speed to %s\n",
2758 sata_spd_string(fls(mask
)));
2763 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2765 struct ata_link
*host_link
= &link
->ap
->link
;
2766 u32 limit
, target
, spd
;
2768 limit
= link
->sata_spd_limit
;
2770 /* Don't configure downstream link faster than upstream link.
2771 * It doesn't speed up anything and some PMPs choke on such
2774 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2775 limit
&= (1 << host_link
->sata_spd
) - 1;
2777 if (limit
== UINT_MAX
)
2780 target
= fls(limit
);
2782 spd
= (*scontrol
>> 4) & 0xf;
2783 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2785 return spd
!= target
;
2789 * sata_set_spd_needed - is SATA spd configuration needed
2790 * @link: Link in question
2792 * Test whether the spd limit in SControl matches
2793 * @link->sata_spd_limit. This function is used to determine
2794 * whether hardreset is necessary to apply SATA spd
2798 * Inherited from caller.
2801 * 1 if SATA spd configuration is needed, 0 otherwise.
2803 static int sata_set_spd_needed(struct ata_link
*link
)
2807 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2810 return __sata_set_spd_needed(link
, &scontrol
);
2814 * sata_set_spd - set SATA spd according to spd limit
2815 * @link: Link to set SATA spd for
2817 * Set SATA spd of @link according to sata_spd_limit.
2820 * Inherited from caller.
2823 * 0 if spd doesn't need to be changed, 1 if spd has been
2824 * changed. Negative errno if SCR registers are inaccessible.
2826 int sata_set_spd(struct ata_link
*link
)
2831 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2834 if (!__sata_set_spd_needed(link
, &scontrol
))
2837 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2844 * This mode timing computation functionality is ported over from
2845 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2848 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2849 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2850 * for UDMA6, which is currently supported only by Maxtor drives.
2852 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2855 static const struct ata_timing ata_timing
[] = {
2856 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2857 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2858 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2859 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2860 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2861 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2862 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2863 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2865 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2866 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2867 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2869 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2870 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2871 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2872 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2873 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2875 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2876 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2877 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2878 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2879 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2880 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2881 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2882 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2887 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2888 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2890 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2892 q
->setup
= EZ(t
->setup
* 1000, T
);
2893 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2894 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2895 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2896 q
->active
= EZ(t
->active
* 1000, T
);
2897 q
->recover
= EZ(t
->recover
* 1000, T
);
2898 q
->dmack_hold
= EZ(t
->dmack_hold
* 1000, T
);
2899 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2900 q
->udma
= EZ(t
->udma
* 1000, UT
);
2903 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2904 struct ata_timing
*m
, unsigned int what
)
2906 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2907 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2908 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2909 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2910 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2911 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2912 if (what
& ATA_TIMING_DMACK_HOLD
) m
->dmack_hold
= max(a
->dmack_hold
, b
->dmack_hold
);
2913 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2914 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2917 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2919 const struct ata_timing
*t
= ata_timing
;
2921 while (xfer_mode
> t
->mode
)
2924 if (xfer_mode
== t
->mode
)
2929 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2930 struct ata_timing
*t
, int T
, int UT
)
2932 const u16
*id
= adev
->id
;
2933 const struct ata_timing
*s
;
2934 struct ata_timing p
;
2940 if (!(s
= ata_timing_find_mode(speed
)))
2943 memcpy(t
, s
, sizeof(*s
));
2946 * If the drive is an EIDE drive, it can tell us it needs extended
2947 * PIO/MW_DMA cycle timing.
2950 if (id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2951 memset(&p
, 0, sizeof(p
));
2953 if (speed
>= XFER_PIO_0
&& speed
< XFER_SW_DMA_0
) {
2954 if (speed
<= XFER_PIO_2
)
2955 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO
];
2956 else if ((speed
<= XFER_PIO_4
) ||
2957 (speed
== XFER_PIO_5
&& !ata_id_is_cfa(id
)))
2958 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO_IORDY
];
2959 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
)
2960 p
.cycle
= id
[ATA_ID_EIDE_DMA_MIN
];
2962 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2966 * Convert the timing to bus clock counts.
2969 ata_timing_quantize(t
, t
, T
, UT
);
2972 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2973 * S.M.A.R.T * and some other commands. We have to ensure that the
2974 * DMA cycle timing is slower/equal than the fastest PIO timing.
2977 if (speed
> XFER_PIO_6
) {
2978 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
2979 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
2983 * Lengthen active & recovery time so that cycle time is correct.
2986 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
2987 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
2988 t
->rec8b
= t
->cyc8b
- t
->act8b
;
2991 if (t
->active
+ t
->recover
< t
->cycle
) {
2992 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
2993 t
->recover
= t
->cycle
- t
->active
;
2996 /* In a few cases quantisation may produce enough errors to
2997 leave t->cycle too low for the sum of active and recovery
2998 if so we must correct this */
2999 if (t
->active
+ t
->recover
> t
->cycle
)
3000 t
->cycle
= t
->active
+ t
->recover
;
3006 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3007 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3008 * @cycle: cycle duration in ns
3010 * Return matching xfer mode for @cycle. The returned mode is of
3011 * the transfer type specified by @xfer_shift. If @cycle is too
3012 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3013 * than the fastest known mode, the fasted mode is returned.
3019 * Matching xfer_mode, 0xff if no match found.
3021 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3023 u8 base_mode
= 0xff, last_mode
= 0xff;
3024 const struct ata_xfer_ent
*ent
;
3025 const struct ata_timing
*t
;
3027 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3028 if (ent
->shift
== xfer_shift
)
3029 base_mode
= ent
->base
;
3031 for (t
= ata_timing_find_mode(base_mode
);
3032 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3033 unsigned short this_cycle
;
3035 switch (xfer_shift
) {
3037 case ATA_SHIFT_MWDMA
:
3038 this_cycle
= t
->cycle
;
3040 case ATA_SHIFT_UDMA
:
3041 this_cycle
= t
->udma
;
3047 if (cycle
> this_cycle
)
3050 last_mode
= t
->mode
;
3057 * ata_down_xfermask_limit - adjust dev xfer masks downward
3058 * @dev: Device to adjust xfer masks
3059 * @sel: ATA_DNXFER_* selector
3061 * Adjust xfer masks of @dev downward. Note that this function
3062 * does not apply the change. Invoking ata_set_mode() afterwards
3063 * will apply the limit.
3066 * Inherited from caller.
3069 * 0 on success, negative errno on failure
3071 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3074 unsigned long orig_mask
, xfer_mask
;
3075 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3078 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3079 sel
&= ~ATA_DNXFER_QUIET
;
3081 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3084 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3087 case ATA_DNXFER_PIO
:
3088 highbit
= fls(pio_mask
) - 1;
3089 pio_mask
&= ~(1 << highbit
);
3092 case ATA_DNXFER_DMA
:
3094 highbit
= fls(udma_mask
) - 1;
3095 udma_mask
&= ~(1 << highbit
);
3098 } else if (mwdma_mask
) {
3099 highbit
= fls(mwdma_mask
) - 1;
3100 mwdma_mask
&= ~(1 << highbit
);
3106 case ATA_DNXFER_40C
:
3107 udma_mask
&= ATA_UDMA_MASK_40C
;
3110 case ATA_DNXFER_FORCE_PIO0
:
3112 case ATA_DNXFER_FORCE_PIO
:
3121 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3123 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3127 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3128 snprintf(buf
, sizeof(buf
), "%s:%s",
3129 ata_mode_string(xfer_mask
),
3130 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3132 snprintf(buf
, sizeof(buf
), "%s",
3133 ata_mode_string(xfer_mask
));
3135 ata_dev_warn(dev
, "limiting speed to %s\n", buf
);
3138 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3144 static int ata_dev_set_mode(struct ata_device
*dev
)
3146 struct ata_port
*ap
= dev
->link
->ap
;
3147 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3148 const bool nosetxfer
= dev
->horkage
& ATA_HORKAGE_NOSETXFER
;
3149 const char *dev_err_whine
= "";
3150 int ign_dev_err
= 0;
3151 unsigned int err_mask
= 0;
3154 dev
->flags
&= ~ATA_DFLAG_PIO
;
3155 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3156 dev
->flags
|= ATA_DFLAG_PIO
;
3158 if (nosetxfer
&& ap
->flags
& ATA_FLAG_SATA
&& ata_id_is_sata(dev
->id
))
3159 dev_err_whine
= " (SET_XFERMODE skipped)";
3163 "NOSETXFER but PATA detected - can't "
3164 "skip SETXFER, might malfunction\n");
3165 err_mask
= ata_dev_set_xfermode(dev
);
3168 if (err_mask
& ~AC_ERR_DEV
)
3172 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3173 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3174 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3178 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3179 /* Old CFA may refuse this command, which is just fine */
3180 if (ata_id_is_cfa(dev
->id
))
3182 /* Catch several broken garbage emulations plus some pre
3184 if (ata_id_major_version(dev
->id
) == 0 &&
3185 dev
->pio_mode
<= XFER_PIO_2
)
3187 /* Some very old devices and some bad newer ones fail
3188 any kind of SET_XFERMODE request but support PIO0-2
3189 timings and no IORDY */
3190 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3193 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3194 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3195 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3196 dev
->dma_mode
== XFER_MW_DMA_0
&&
3197 (dev
->id
[63] >> 8) & 1)
3200 /* if the device is actually configured correctly, ignore dev err */
3201 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3204 if (err_mask
& AC_ERR_DEV
) {
3208 dev_err_whine
= " (device error ignored)";
3211 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3212 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3214 ata_dev_info(dev
, "configured for %s%s\n",
3215 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3221 ata_dev_err(dev
, "failed to set xfermode (err_mask=0x%x)\n", err_mask
);
3226 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3227 * @link: link on which timings will be programmed
3228 * @r_failed_dev: out parameter for failed device
3230 * Standard implementation of the function used to tune and set
3231 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3232 * ata_dev_set_mode() fails, pointer to the failing device is
3233 * returned in @r_failed_dev.
3236 * PCI/etc. bus probe sem.
3239 * 0 on success, negative errno otherwise
3242 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3244 struct ata_port
*ap
= link
->ap
;
3245 struct ata_device
*dev
;
3246 int rc
= 0, used_dma
= 0, found
= 0;
3248 /* step 1: calculate xfer_mask */
3249 ata_for_each_dev(dev
, link
, ENABLED
) {
3250 unsigned long pio_mask
, dma_mask
;
3251 unsigned int mode_mask
;
3253 mode_mask
= ATA_DMA_MASK_ATA
;
3254 if (dev
->class == ATA_DEV_ATAPI
)
3255 mode_mask
= ATA_DMA_MASK_ATAPI
;
3256 else if (ata_id_is_cfa(dev
->id
))
3257 mode_mask
= ATA_DMA_MASK_CFA
;
3259 ata_dev_xfermask(dev
);
3260 ata_force_xfermask(dev
);
3262 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3264 if (libata_dma_mask
& mode_mask
)
3265 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
,
3270 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3271 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3274 if (ata_dma_enabled(dev
))
3280 /* step 2: always set host PIO timings */
3281 ata_for_each_dev(dev
, link
, ENABLED
) {
3282 if (dev
->pio_mode
== 0xff) {
3283 ata_dev_warn(dev
, "no PIO support\n");
3288 dev
->xfer_mode
= dev
->pio_mode
;
3289 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3290 if (ap
->ops
->set_piomode
)
3291 ap
->ops
->set_piomode(ap
, dev
);
3294 /* step 3: set host DMA timings */
3295 ata_for_each_dev(dev
, link
, ENABLED
) {
3296 if (!ata_dma_enabled(dev
))
3299 dev
->xfer_mode
= dev
->dma_mode
;
3300 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3301 if (ap
->ops
->set_dmamode
)
3302 ap
->ops
->set_dmamode(ap
, dev
);
3305 /* step 4: update devices' xfer mode */
3306 ata_for_each_dev(dev
, link
, ENABLED
) {
3307 rc
= ata_dev_set_mode(dev
);
3312 /* Record simplex status. If we selected DMA then the other
3313 * host channels are not permitted to do so.
3315 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3316 ap
->host
->simplex_claimed
= ap
;
3320 *r_failed_dev
= dev
;
3325 * ata_wait_ready - wait for link to become ready
3326 * @link: link to be waited on
3327 * @deadline: deadline jiffies for the operation
3328 * @check_ready: callback to check link readiness
3330 * Wait for @link to become ready. @check_ready should return
3331 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3332 * link doesn't seem to be occupied, other errno for other error
3335 * Transient -ENODEV conditions are allowed for
3336 * ATA_TMOUT_FF_WAIT.
3342 * 0 if @linke is ready before @deadline; otherwise, -errno.
3344 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3345 int (*check_ready
)(struct ata_link
*link
))
3347 unsigned long start
= jiffies
;
3348 unsigned long nodev_deadline
;
3351 /* choose which 0xff timeout to use, read comment in libata.h */
3352 if (link
->ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
)
3353 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT_LONG
);
3355 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3357 /* Slave readiness can't be tested separately from master. On
3358 * M/S emulation configuration, this function should be called
3359 * only on the master and it will handle both master and slave.
3361 WARN_ON(link
== link
->ap
->slave_link
);
3363 if (time_after(nodev_deadline
, deadline
))
3364 nodev_deadline
= deadline
;
3367 unsigned long now
= jiffies
;
3370 ready
= tmp
= check_ready(link
);
3375 * -ENODEV could be transient. Ignore -ENODEV if link
3376 * is online. Also, some SATA devices take a long
3377 * time to clear 0xff after reset. Wait for
3378 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3381 * Note that some PATA controllers (pata_ali) explode
3382 * if status register is read more than once when
3383 * there's no device attached.
3385 if (ready
== -ENODEV
) {
3386 if (ata_link_online(link
))
3388 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3389 !ata_link_offline(link
) &&
3390 time_before(now
, nodev_deadline
))
3396 if (time_after(now
, deadline
))
3399 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3400 (deadline
- now
> 3 * HZ
)) {
3402 "link is slow to respond, please be patient "
3403 "(ready=%d)\n", tmp
);
3407 ata_msleep(link
->ap
, 50);
3412 * ata_wait_after_reset - wait for link to become ready after reset
3413 * @link: link to be waited on
3414 * @deadline: deadline jiffies for the operation
3415 * @check_ready: callback to check link readiness
3417 * Wait for @link to become ready after reset.
3423 * 0 if @linke is ready before @deadline; otherwise, -errno.
3425 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3426 int (*check_ready
)(struct ata_link
*link
))
3428 ata_msleep(link
->ap
, ATA_WAIT_AFTER_RESET
);
3430 return ata_wait_ready(link
, deadline
, check_ready
);
3434 * sata_link_debounce - debounce SATA phy status
3435 * @link: ATA link to debounce SATA phy status for
3436 * @params: timing parameters { interval, duratinon, timeout } in msec
3437 * @deadline: deadline jiffies for the operation
3439 * Make sure SStatus of @link reaches stable state, determined by
3440 * holding the same value where DET is not 1 for @duration polled
3441 * every @interval, before @timeout. Timeout constraints the
3442 * beginning of the stable state. Because DET gets stuck at 1 on
3443 * some controllers after hot unplugging, this functions waits
3444 * until timeout then returns 0 if DET is stable at 1.
3446 * @timeout is further limited by @deadline. The sooner of the
3450 * Kernel thread context (may sleep)
3453 * 0 on success, -errno on failure.
3455 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3456 unsigned long deadline
)
3458 unsigned long interval
= params
[0];
3459 unsigned long duration
= params
[1];
3460 unsigned long last_jiffies
, t
;
3464 t
= ata_deadline(jiffies
, params
[2]);
3465 if (time_before(t
, deadline
))
3468 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3473 last_jiffies
= jiffies
;
3476 ata_msleep(link
->ap
, interval
);
3477 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3483 if (cur
== 1 && time_before(jiffies
, deadline
))
3485 if (time_after(jiffies
,
3486 ata_deadline(last_jiffies
, duration
)))
3491 /* unstable, start over */
3493 last_jiffies
= jiffies
;
3495 /* Check deadline. If debouncing failed, return
3496 * -EPIPE to tell upper layer to lower link speed.
3498 if (time_after(jiffies
, deadline
))
3504 * sata_link_resume - resume SATA link
3505 * @link: ATA link to resume SATA
3506 * @params: timing parameters { interval, duratinon, timeout } in msec
3507 * @deadline: deadline jiffies for the operation
3509 * Resume SATA phy @link and debounce it.
3512 * Kernel thread context (may sleep)
3515 * 0 on success, -errno on failure.
3517 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3518 unsigned long deadline
)
3520 int tries
= ATA_LINK_RESUME_TRIES
;
3521 u32 scontrol
, serror
;
3524 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3528 * Writes to SControl sometimes get ignored under certain
3529 * controllers (ata_piix SIDPR). Make sure DET actually is
3533 scontrol
= (scontrol
& 0x0f0) | 0x300;
3534 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3537 * Some PHYs react badly if SStatus is pounded
3538 * immediately after resuming. Delay 200ms before
3541 ata_msleep(link
->ap
, 200);
3543 /* is SControl restored correctly? */
3544 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3546 } while ((scontrol
& 0xf0f) != 0x300 && --tries
);
3548 if ((scontrol
& 0xf0f) != 0x300) {
3549 ata_link_warn(link
, "failed to resume link (SControl %X)\n",
3554 if (tries
< ATA_LINK_RESUME_TRIES
)
3555 ata_link_warn(link
, "link resume succeeded after %d retries\n",
3556 ATA_LINK_RESUME_TRIES
- tries
);
3558 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3561 /* clear SError, some PHYs require this even for SRST to work */
3562 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3563 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3565 return rc
!= -EINVAL
? rc
: 0;
3569 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3570 * @link: ATA link to manipulate SControl for
3571 * @policy: LPM policy to configure
3572 * @spm_wakeup: initiate LPM transition to active state
3574 * Manipulate the IPM field of the SControl register of @link
3575 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3576 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3577 * the link. This function also clears PHYRDY_CHG before
3584 * 0 on succes, -errno otherwise.
3586 int sata_link_scr_lpm(struct ata_link
*link
, enum ata_lpm_policy policy
,
3589 struct ata_eh_context
*ehc
= &link
->eh_context
;
3590 bool woken_up
= false;
3594 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
3599 case ATA_LPM_MAX_POWER
:
3600 /* disable all LPM transitions */
3601 scontrol
|= (0x3 << 8);
3602 /* initiate transition to active state */
3604 scontrol
|= (0x4 << 12);
3608 case ATA_LPM_MED_POWER
:
3609 /* allow LPM to PARTIAL */
3610 scontrol
&= ~(0x1 << 8);
3611 scontrol
|= (0x2 << 8);
3613 case ATA_LPM_MIN_POWER
:
3614 if (ata_link_nr_enabled(link
) > 0)
3615 /* no restrictions on LPM transitions */
3616 scontrol
&= ~(0x3 << 8);
3618 /* empty port, power off */
3620 scontrol
|= (0x1 << 2);
3627 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
3631 /* give the link time to transit out of LPM state */
3635 /* clear PHYRDY_CHG from SError */
3636 ehc
->i
.serror
&= ~SERR_PHYRDY_CHG
;
3637 return sata_scr_write(link
, SCR_ERROR
, SERR_PHYRDY_CHG
);
3641 * ata_std_prereset - prepare for reset
3642 * @link: ATA link to be reset
3643 * @deadline: deadline jiffies for the operation
3645 * @link is about to be reset. Initialize it. Failure from
3646 * prereset makes libata abort whole reset sequence and give up
3647 * that port, so prereset should be best-effort. It does its
3648 * best to prepare for reset sequence but if things go wrong, it
3649 * should just whine, not fail.
3652 * Kernel thread context (may sleep)
3655 * 0 on success, -errno otherwise.
3657 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3659 struct ata_port
*ap
= link
->ap
;
3660 struct ata_eh_context
*ehc
= &link
->eh_context
;
3661 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3664 /* if we're about to do hardreset, nothing more to do */
3665 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3668 /* if SATA, resume link */
3669 if (ap
->flags
& ATA_FLAG_SATA
) {
3670 rc
= sata_link_resume(link
, timing
, deadline
);
3671 /* whine about phy resume failure but proceed */
3672 if (rc
&& rc
!= -EOPNOTSUPP
)
3674 "failed to resume link for reset (errno=%d)\n",
3678 /* no point in trying softreset on offline link */
3679 if (ata_phys_link_offline(link
))
3680 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3686 * sata_link_hardreset - reset link via SATA phy reset
3687 * @link: link to reset
3688 * @timing: timing parameters { interval, duratinon, timeout } in msec
3689 * @deadline: deadline jiffies for the operation
3690 * @online: optional out parameter indicating link onlineness
3691 * @check_ready: optional callback to check link readiness
3693 * SATA phy-reset @link using DET bits of SControl register.
3694 * After hardreset, link readiness is waited upon using
3695 * ata_wait_ready() if @check_ready is specified. LLDs are
3696 * allowed to not specify @check_ready and wait itself after this
3697 * function returns. Device classification is LLD's
3700 * *@online is set to one iff reset succeeded and @link is online
3704 * Kernel thread context (may sleep)
3707 * 0 on success, -errno otherwise.
3709 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3710 unsigned long deadline
,
3711 bool *online
, int (*check_ready
)(struct ata_link
*))
3721 if (sata_set_spd_needed(link
)) {
3722 /* SATA spec says nothing about how to reconfigure
3723 * spd. To be on the safe side, turn off phy during
3724 * reconfiguration. This works for at least ICH7 AHCI
3727 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3730 scontrol
= (scontrol
& 0x0f0) | 0x304;
3732 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3738 /* issue phy wake/reset */
3739 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3742 scontrol
= (scontrol
& 0x0f0) | 0x301;
3744 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3747 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3748 * 10.4.2 says at least 1 ms.
3750 ata_msleep(link
->ap
, 1);
3752 /* bring link back */
3753 rc
= sata_link_resume(link
, timing
, deadline
);
3756 /* if link is offline nothing more to do */
3757 if (ata_phys_link_offline(link
))
3760 /* Link is online. From this point, -ENODEV too is an error. */
3764 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3765 /* If PMP is supported, we have to do follow-up SRST.
3766 * Some PMPs don't send D2H Reg FIS after hardreset if
3767 * the first port is empty. Wait only for
3768 * ATA_TMOUT_PMP_SRST_WAIT.
3771 unsigned long pmp_deadline
;
3773 pmp_deadline
= ata_deadline(jiffies
,
3774 ATA_TMOUT_PMP_SRST_WAIT
);
3775 if (time_after(pmp_deadline
, deadline
))
3776 pmp_deadline
= deadline
;
3777 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3785 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3787 if (rc
&& rc
!= -EAGAIN
) {
3788 /* online is set iff link is online && reset succeeded */
3791 ata_link_err(link
, "COMRESET failed (errno=%d)\n", rc
);
3793 DPRINTK("EXIT, rc=%d\n", rc
);
3798 * sata_std_hardreset - COMRESET w/o waiting or classification
3799 * @link: link to reset
3800 * @class: resulting class of attached device
3801 * @deadline: deadline jiffies for the operation
3803 * Standard SATA COMRESET w/o waiting or classification.
3806 * Kernel thread context (may sleep)
3809 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3811 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3812 unsigned long deadline
)
3814 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3819 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3820 return online
? -EAGAIN
: rc
;
3824 * ata_std_postreset - standard postreset callback
3825 * @link: the target ata_link
3826 * @classes: classes of attached devices
3828 * This function is invoked after a successful reset. Note that
3829 * the device might have been reset more than once using
3830 * different reset methods before postreset is invoked.
3833 * Kernel thread context (may sleep)
3835 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3841 /* reset complete, clear SError */
3842 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3843 sata_scr_write(link
, SCR_ERROR
, serror
);
3845 /* print link status */
3846 sata_print_link_status(link
);
3852 * ata_dev_same_device - Determine whether new ID matches configured device
3853 * @dev: device to compare against
3854 * @new_class: class of the new device
3855 * @new_id: IDENTIFY page of the new device
3857 * Compare @new_class and @new_id against @dev and determine
3858 * whether @dev is the device indicated by @new_class and
3865 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3867 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3870 const u16
*old_id
= dev
->id
;
3871 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3872 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3874 if (dev
->class != new_class
) {
3875 ata_dev_info(dev
, "class mismatch %d != %d\n",
3876 dev
->class, new_class
);
3880 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3881 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3882 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3883 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3885 if (strcmp(model
[0], model
[1])) {
3886 ata_dev_info(dev
, "model number mismatch '%s' != '%s'\n",
3887 model
[0], model
[1]);
3891 if (strcmp(serial
[0], serial
[1])) {
3892 ata_dev_info(dev
, "serial number mismatch '%s' != '%s'\n",
3893 serial
[0], serial
[1]);
3901 * ata_dev_reread_id - Re-read IDENTIFY data
3902 * @dev: target ATA device
3903 * @readid_flags: read ID flags
3905 * Re-read IDENTIFY page and make sure @dev is still attached to
3909 * Kernel thread context (may sleep)
3912 * 0 on success, negative errno otherwise
3914 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3916 unsigned int class = dev
->class;
3917 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3921 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3925 /* is the device still there? */
3926 if (!ata_dev_same_device(dev
, class, id
))
3929 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3934 * ata_dev_revalidate - Revalidate ATA device
3935 * @dev: device to revalidate
3936 * @new_class: new class code
3937 * @readid_flags: read ID flags
3939 * Re-read IDENTIFY page, make sure @dev is still attached to the
3940 * port and reconfigure it according to the new IDENTIFY page.
3943 * Kernel thread context (may sleep)
3946 * 0 on success, negative errno otherwise
3948 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3949 unsigned int readid_flags
)
3951 u64 n_sectors
= dev
->n_sectors
;
3952 u64 n_native_sectors
= dev
->n_native_sectors
;
3955 if (!ata_dev_enabled(dev
))
3958 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3959 if (ata_class_enabled(new_class
) &&
3960 new_class
!= ATA_DEV_ATA
&&
3961 new_class
!= ATA_DEV_ATAPI
&&
3962 new_class
!= ATA_DEV_SEMB
) {
3963 ata_dev_info(dev
, "class mismatch %u != %u\n",
3964 dev
->class, new_class
);
3970 rc
= ata_dev_reread_id(dev
, readid_flags
);
3974 /* configure device according to the new ID */
3975 rc
= ata_dev_configure(dev
);
3979 /* verify n_sectors hasn't changed */
3980 if (dev
->class != ATA_DEV_ATA
|| !n_sectors
||
3981 dev
->n_sectors
== n_sectors
)
3984 /* n_sectors has changed */
3985 ata_dev_warn(dev
, "n_sectors mismatch %llu != %llu\n",
3986 (unsigned long long)n_sectors
,
3987 (unsigned long long)dev
->n_sectors
);
3990 * Something could have caused HPA to be unlocked
3991 * involuntarily. If n_native_sectors hasn't changed and the
3992 * new size matches it, keep the device.
3994 if (dev
->n_native_sectors
== n_native_sectors
&&
3995 dev
->n_sectors
> n_sectors
&& dev
->n_sectors
== n_native_sectors
) {
3997 "new n_sectors matches native, probably "
3998 "late HPA unlock, n_sectors updated\n");
3999 /* use the larger n_sectors */
4004 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4005 * unlocking HPA in those cases.
4007 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4009 if (dev
->n_native_sectors
== n_native_sectors
&&
4010 dev
->n_sectors
< n_sectors
&& n_sectors
== n_native_sectors
&&
4011 !(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
)) {
4013 "old n_sectors matches native, probably "
4014 "late HPA lock, will try to unlock HPA\n");
4015 /* try unlocking HPA */
4016 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
4021 /* restore original n_[native_]sectors and fail */
4022 dev
->n_native_sectors
= n_native_sectors
;
4023 dev
->n_sectors
= n_sectors
;
4025 ata_dev_err(dev
, "revalidation failed (errno=%d)\n", rc
);
4029 struct ata_blacklist_entry
{
4030 const char *model_num
;
4031 const char *model_rev
;
4032 unsigned long horkage
;
4035 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4036 /* Devices with DMA related problems under Linux */
4037 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4038 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4039 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4040 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4041 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4042 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4043 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4044 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4045 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4046 { "CRD-848[02]B", NULL
, ATA_HORKAGE_NODMA
},
4047 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4048 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4049 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4050 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4051 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4052 { "HITACHI CDR-8[34]35",NULL
, ATA_HORKAGE_NODMA
},
4053 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4054 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4055 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4056 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4057 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4058 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4059 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4060 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4061 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4062 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4063 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4064 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4065 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA
},
4066 /* Odd clown on sil3726/4726 PMPs */
4067 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
4069 /* Weird ATAPI devices */
4070 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4071 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
4073 /* Devices we expect to fail diagnostics */
4075 /* Devices where NCQ should be avoided */
4077 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4078 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4079 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4080 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4082 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4083 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4084 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4085 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4086 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
4088 /* Seagate NCQ + FLUSH CACHE firmware bug */
4089 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4090 ATA_HORKAGE_FIRMWARE_WARN
},
4092 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4093 ATA_HORKAGE_FIRMWARE_WARN
},
4095 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4096 ATA_HORKAGE_FIRMWARE_WARN
},
4098 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4099 ATA_HORKAGE_FIRMWARE_WARN
},
4101 /* Blacklist entries taken from Silicon Image 3124/3132
4102 Windows driver .inf file - also several Linux problem reports */
4103 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4104 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4105 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4107 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4108 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ
, },
4110 /* devices which puke on READ_NATIVE_MAX */
4111 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4112 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4113 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4114 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4116 /* this one allows HPA unlocking but fails IOs on the area */
4117 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA
},
4119 /* Devices which report 1 sector over size HPA */
4120 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4121 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4122 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4124 /* Devices which get the IVB wrong */
4125 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4126 /* Maybe we should just blacklist TSSTcorp... */
4127 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB
, },
4129 /* Devices that do not need bridging limits applied */
4130 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4131 { "BUFFALO HD-QSU2/R5", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4133 /* Devices which aren't very happy with higher link speeds */
4134 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4135 { "Seagate FreeAgent GoFlex", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4138 * Devices which choke on SETXFER. Applies only if both the
4139 * device and controller are SATA.
4141 { "PIONEER DVD-RW DVRTD08", NULL
, ATA_HORKAGE_NOSETXFER
},
4142 { "PIONEER DVD-RW DVRTD08A", NULL
, ATA_HORKAGE_NOSETXFER
},
4143 { "PIONEER DVD-RW DVR-215", NULL
, ATA_HORKAGE_NOSETXFER
},
4144 { "PIONEER DVD-RW DVR-212D", NULL
, ATA_HORKAGE_NOSETXFER
},
4145 { "PIONEER DVD-RW DVR-216D", NULL
, ATA_HORKAGE_NOSETXFER
},
4152 * glob_match - match a text string against a glob-style pattern
4153 * @text: the string to be examined
4154 * @pattern: the glob-style pattern to be matched against
4156 * Either/both of text and pattern can be empty strings.
4158 * Match text against a glob-style pattern, with wildcards and simple sets:
4160 * ? matches any single character.
4161 * * matches any run of characters.
4162 * [xyz] matches a single character from the set: x, y, or z.
4163 * [a-d] matches a single character from the range: a, b, c, or d.
4164 * [a-d0-9] matches a single character from either range.
4166 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4167 * Behaviour with malformed patterns is undefined, though generally reasonable.
4169 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4171 * This function uses one level of recursion per '*' in pattern.
4172 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4173 * this will not cause stack problems for any reasonable use here.
4176 * 0 on match, 1 otherwise.
4178 static int glob_match (const char *text
, const char *pattern
)
4181 /* Match single character or a '?' wildcard */
4182 if (*text
== *pattern
|| *pattern
== '?') {
4184 return 0; /* End of both strings: match */
4186 /* Match single char against a '[' bracketed ']' pattern set */
4187 if (!*text
|| *pattern
!= '[')
4188 break; /* Not a pattern set */
4189 while (*++pattern
&& *pattern
!= ']' && *text
!= *pattern
) {
4190 if (*pattern
== '-' && *(pattern
- 1) != '[')
4191 if (*text
> *(pattern
- 1) && *text
< *(pattern
+ 1)) {
4196 if (!*pattern
|| *pattern
== ']')
4197 return 1; /* No match */
4198 while (*pattern
&& *pattern
++ != ']');
4200 } while (*++text
&& *pattern
);
4202 /* Match any run of chars against a '*' wildcard */
4203 if (*pattern
== '*') {
4205 return 0; /* Match: avoid recursion at end of pattern */
4206 /* Loop to handle additional pattern chars after the wildcard */
4208 if (glob_match(text
, pattern
) == 0)
4209 return 0; /* Remainder matched */
4210 ++text
; /* Absorb (match) this char and try again */
4213 if (!*text
&& !*pattern
)
4214 return 0; /* End of both strings: match */
4215 return 1; /* No match */
4218 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4220 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4221 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4222 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4224 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4225 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4227 while (ad
->model_num
) {
4228 if (!glob_match(model_num
, ad
->model_num
)) {
4229 if (ad
->model_rev
== NULL
)
4231 if (!glob_match(model_rev
, ad
->model_rev
))
4239 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4241 /* We don't support polling DMA.
4242 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4243 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4245 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4246 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4248 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4252 * ata_is_40wire - check drive side detection
4255 * Perform drive side detection decoding, allowing for device vendors
4256 * who can't follow the documentation.
4259 static int ata_is_40wire(struct ata_device
*dev
)
4261 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4262 return ata_drive_40wire_relaxed(dev
->id
);
4263 return ata_drive_40wire(dev
->id
);
4267 * cable_is_40wire - 40/80/SATA decider
4268 * @ap: port to consider
4270 * This function encapsulates the policy for speed management
4271 * in one place. At the moment we don't cache the result but
4272 * there is a good case for setting ap->cbl to the result when
4273 * we are called with unknown cables (and figuring out if it
4274 * impacts hotplug at all).
4276 * Return 1 if the cable appears to be 40 wire.
4279 static int cable_is_40wire(struct ata_port
*ap
)
4281 struct ata_link
*link
;
4282 struct ata_device
*dev
;
4284 /* If the controller thinks we are 40 wire, we are. */
4285 if (ap
->cbl
== ATA_CBL_PATA40
)
4288 /* If the controller thinks we are 80 wire, we are. */
4289 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4292 /* If the system is known to be 40 wire short cable (eg
4293 * laptop), then we allow 80 wire modes even if the drive
4296 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4299 /* If the controller doesn't know, we scan.
4301 * Note: We look for all 40 wire detects at this point. Any
4302 * 80 wire detect is taken to be 80 wire cable because
4303 * - in many setups only the one drive (slave if present) will
4304 * give a valid detect
4305 * - if you have a non detect capable drive you don't want it
4306 * to colour the choice
4308 ata_for_each_link(link
, ap
, EDGE
) {
4309 ata_for_each_dev(dev
, link
, ENABLED
) {
4310 if (!ata_is_40wire(dev
))
4318 * ata_dev_xfermask - Compute supported xfermask of the given device
4319 * @dev: Device to compute xfermask for
4321 * Compute supported xfermask of @dev and store it in
4322 * dev->*_mask. This function is responsible for applying all
4323 * known limits including host controller limits, device
4329 static void ata_dev_xfermask(struct ata_device
*dev
)
4331 struct ata_link
*link
= dev
->link
;
4332 struct ata_port
*ap
= link
->ap
;
4333 struct ata_host
*host
= ap
->host
;
4334 unsigned long xfer_mask
;
4336 /* controller modes available */
4337 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4338 ap
->mwdma_mask
, ap
->udma_mask
);
4340 /* drive modes available */
4341 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4342 dev
->mwdma_mask
, dev
->udma_mask
);
4343 xfer_mask
&= ata_id_xfermask(dev
->id
);
4346 * CFA Advanced TrueIDE timings are not allowed on a shared
4349 if (ata_dev_pair(dev
)) {
4350 /* No PIO5 or PIO6 */
4351 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4352 /* No MWDMA3 or MWDMA 4 */
4353 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4356 if (ata_dma_blacklisted(dev
)) {
4357 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4359 "device is on DMA blacklist, disabling DMA\n");
4362 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4363 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4364 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4366 "simplex DMA is claimed by other device, disabling DMA\n");
4369 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4370 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4372 if (ap
->ops
->mode_filter
)
4373 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4375 /* Apply cable rule here. Don't apply it early because when
4376 * we handle hot plug the cable type can itself change.
4377 * Check this last so that we know if the transfer rate was
4378 * solely limited by the cable.
4379 * Unknown or 80 wire cables reported host side are checked
4380 * drive side as well. Cases where we know a 40wire cable
4381 * is used safely for 80 are not checked here.
4383 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4384 /* UDMA/44 or higher would be available */
4385 if (cable_is_40wire(ap
)) {
4387 "limited to UDMA/33 due to 40-wire cable\n");
4388 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4391 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4392 &dev
->mwdma_mask
, &dev
->udma_mask
);
4396 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4397 * @dev: Device to which command will be sent
4399 * Issue SET FEATURES - XFER MODE command to device @dev
4403 * PCI/etc. bus probe sem.
4406 * 0 on success, AC_ERR_* mask otherwise.
4409 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4411 struct ata_taskfile tf
;
4412 unsigned int err_mask
;
4414 /* set up set-features taskfile */
4415 DPRINTK("set features - xfer mode\n");
4417 /* Some controllers and ATAPI devices show flaky interrupt
4418 * behavior after setting xfer mode. Use polling instead.
4420 ata_tf_init(dev
, &tf
);
4421 tf
.command
= ATA_CMD_SET_FEATURES
;
4422 tf
.feature
= SETFEATURES_XFER
;
4423 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4424 tf
.protocol
= ATA_PROT_NODATA
;
4425 /* If we are using IORDY we must send the mode setting command */
4426 if (ata_pio_need_iordy(dev
))
4427 tf
.nsect
= dev
->xfer_mode
;
4428 /* If the device has IORDY and the controller does not - turn it off */
4429 else if (ata_id_has_iordy(dev
->id
))
4431 else /* In the ancient relic department - skip all of this */
4434 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4436 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4441 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4442 * @dev: Device to which command will be sent
4443 * @enable: Whether to enable or disable the feature
4444 * @feature: The sector count represents the feature to set
4446 * Issue SET FEATURES - SATA FEATURES command to device @dev
4447 * on port @ap with sector count
4450 * PCI/etc. bus probe sem.
4453 * 0 on success, AC_ERR_* mask otherwise.
4455 unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
, u8 feature
)
4457 struct ata_taskfile tf
;
4458 unsigned int err_mask
;
4460 /* set up set-features taskfile */
4461 DPRINTK("set features - SATA features\n");
4463 ata_tf_init(dev
, &tf
);
4464 tf
.command
= ATA_CMD_SET_FEATURES
;
4465 tf
.feature
= enable
;
4466 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4467 tf
.protocol
= ATA_PROT_NODATA
;
4470 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4472 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4477 * ata_dev_init_params - Issue INIT DEV PARAMS command
4478 * @dev: Device to which command will be sent
4479 * @heads: Number of heads (taskfile parameter)
4480 * @sectors: Number of sectors (taskfile parameter)
4483 * Kernel thread context (may sleep)
4486 * 0 on success, AC_ERR_* mask otherwise.
4488 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4489 u16 heads
, u16 sectors
)
4491 struct ata_taskfile tf
;
4492 unsigned int err_mask
;
4494 /* Number of sectors per track 1-255. Number of heads 1-16 */
4495 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4496 return AC_ERR_INVALID
;
4498 /* set up init dev params taskfile */
4499 DPRINTK("init dev params \n");
4501 ata_tf_init(dev
, &tf
);
4502 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4503 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4504 tf
.protocol
= ATA_PROT_NODATA
;
4506 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4508 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4509 /* A clean abort indicates an original or just out of spec drive
4510 and we should continue as we issue the setup based on the
4511 drive reported working geometry */
4512 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4515 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4520 * ata_sg_clean - Unmap DMA memory associated with command
4521 * @qc: Command containing DMA memory to be released
4523 * Unmap all mapped DMA memory associated with this command.
4526 * spin_lock_irqsave(host lock)
4528 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4530 struct ata_port
*ap
= qc
->ap
;
4531 struct scatterlist
*sg
= qc
->sg
;
4532 int dir
= qc
->dma_dir
;
4534 WARN_ON_ONCE(sg
== NULL
);
4536 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4539 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4541 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4546 * atapi_check_dma - Check whether ATAPI DMA can be supported
4547 * @qc: Metadata associated with taskfile to check
4549 * Allow low-level driver to filter ATA PACKET commands, returning
4550 * a status indicating whether or not it is OK to use DMA for the
4551 * supplied PACKET command.
4554 * spin_lock_irqsave(host lock)
4556 * RETURNS: 0 when ATAPI DMA can be used
4559 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4561 struct ata_port
*ap
= qc
->ap
;
4563 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4564 * few ATAPI devices choke on such DMA requests.
4566 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4567 unlikely(qc
->nbytes
& 15))
4570 if (ap
->ops
->check_atapi_dma
)
4571 return ap
->ops
->check_atapi_dma(qc
);
4577 * ata_std_qc_defer - Check whether a qc needs to be deferred
4578 * @qc: ATA command in question
4580 * Non-NCQ commands cannot run with any other command, NCQ or
4581 * not. As upper layer only knows the queue depth, we are
4582 * responsible for maintaining exclusion. This function checks
4583 * whether a new command @qc can be issued.
4586 * spin_lock_irqsave(host lock)
4589 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4591 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4593 struct ata_link
*link
= qc
->dev
->link
;
4595 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4596 if (!ata_tag_valid(link
->active_tag
))
4599 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4603 return ATA_DEFER_LINK
;
4606 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4609 * ata_sg_init - Associate command with scatter-gather table.
4610 * @qc: Command to be associated
4611 * @sg: Scatter-gather table.
4612 * @n_elem: Number of elements in s/g table.
4614 * Initialize the data-related elements of queued_cmd @qc
4615 * to point to a scatter-gather table @sg, containing @n_elem
4619 * spin_lock_irqsave(host lock)
4621 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4622 unsigned int n_elem
)
4625 qc
->n_elem
= n_elem
;
4630 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4631 * @qc: Command with scatter-gather table to be mapped.
4633 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4636 * spin_lock_irqsave(host lock)
4639 * Zero on success, negative on error.
4642 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4644 struct ata_port
*ap
= qc
->ap
;
4645 unsigned int n_elem
;
4647 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4649 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4653 DPRINTK("%d sg elements mapped\n", n_elem
);
4654 qc
->orig_n_elem
= qc
->n_elem
;
4655 qc
->n_elem
= n_elem
;
4656 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4662 * swap_buf_le16 - swap halves of 16-bit words in place
4663 * @buf: Buffer to swap
4664 * @buf_words: Number of 16-bit words in buffer.
4666 * Swap halves of 16-bit words if needed to convert from
4667 * little-endian byte order to native cpu byte order, or
4671 * Inherited from caller.
4673 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4678 for (i
= 0; i
< buf_words
; i
++)
4679 buf
[i
] = le16_to_cpu(buf
[i
]);
4680 #endif /* __BIG_ENDIAN */
4684 * ata_qc_new - Request an available ATA command, for queueing
4691 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4693 struct ata_queued_cmd
*qc
= NULL
;
4696 /* no command while frozen */
4697 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4700 /* the last tag is reserved for internal command. */
4701 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4702 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4703 qc
= __ata_qc_from_tag(ap
, i
);
4714 * ata_qc_new_init - Request an available ATA command, and initialize it
4715 * @dev: Device from whom we request an available command structure
4721 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4723 struct ata_port
*ap
= dev
->link
->ap
;
4724 struct ata_queued_cmd
*qc
;
4726 qc
= ata_qc_new(ap
);
4739 * ata_qc_free - free unused ata_queued_cmd
4740 * @qc: Command to complete
4742 * Designed to free unused ata_queued_cmd object
4743 * in case something prevents using it.
4746 * spin_lock_irqsave(host lock)
4748 void ata_qc_free(struct ata_queued_cmd
*qc
)
4750 struct ata_port
*ap
;
4753 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4758 if (likely(ata_tag_valid(tag
))) {
4759 qc
->tag
= ATA_TAG_POISON
;
4760 clear_bit(tag
, &ap
->qc_allocated
);
4764 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4766 struct ata_port
*ap
;
4767 struct ata_link
*link
;
4769 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4770 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4772 link
= qc
->dev
->link
;
4774 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4777 /* command should be marked inactive atomically with qc completion */
4778 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4779 link
->sactive
&= ~(1 << qc
->tag
);
4781 ap
->nr_active_links
--;
4783 link
->active_tag
= ATA_TAG_POISON
;
4784 ap
->nr_active_links
--;
4787 /* clear exclusive status */
4788 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4789 ap
->excl_link
== link
))
4790 ap
->excl_link
= NULL
;
4792 /* atapi: mark qc as inactive to prevent the interrupt handler
4793 * from completing the command twice later, before the error handler
4794 * is called. (when rc != 0 and atapi request sense is needed)
4796 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4797 ap
->qc_active
&= ~(1 << qc
->tag
);
4799 /* call completion callback */
4800 qc
->complete_fn(qc
);
4803 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4805 struct ata_port
*ap
= qc
->ap
;
4807 qc
->result_tf
.flags
= qc
->tf
.flags
;
4808 ap
->ops
->qc_fill_rtf(qc
);
4811 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4813 struct ata_device
*dev
= qc
->dev
;
4815 if (ata_is_nodata(qc
->tf
.protocol
))
4818 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4821 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4825 * ata_qc_complete - Complete an active ATA command
4826 * @qc: Command to complete
4828 * Indicate to the mid and upper layers that an ATA command has
4829 * completed, with either an ok or not-ok status.
4831 * Refrain from calling this function multiple times when
4832 * successfully completing multiple NCQ commands.
4833 * ata_qc_complete_multiple() should be used instead, which will
4834 * properly update IRQ expect state.
4837 * spin_lock_irqsave(host lock)
4839 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4841 struct ata_port
*ap
= qc
->ap
;
4843 /* XXX: New EH and old EH use different mechanisms to
4844 * synchronize EH with regular execution path.
4846 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4847 * Normal execution path is responsible for not accessing a
4848 * failed qc. libata core enforces the rule by returning NULL
4849 * from ata_qc_from_tag() for failed qcs.
4851 * Old EH depends on ata_qc_complete() nullifying completion
4852 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4853 * not synchronize with interrupt handler. Only PIO task is
4856 if (ap
->ops
->error_handler
) {
4857 struct ata_device
*dev
= qc
->dev
;
4858 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4860 if (unlikely(qc
->err_mask
))
4861 qc
->flags
|= ATA_QCFLAG_FAILED
;
4864 * Finish internal commands without any further processing
4865 * and always with the result TF filled.
4867 if (unlikely(ata_tag_internal(qc
->tag
))) {
4869 __ata_qc_complete(qc
);
4874 * Non-internal qc has failed. Fill the result TF and
4877 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4879 ata_qc_schedule_eh(qc
);
4883 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4885 /* read result TF if requested */
4886 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4889 /* Some commands need post-processing after successful
4892 switch (qc
->tf
.command
) {
4893 case ATA_CMD_SET_FEATURES
:
4894 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4895 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4898 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4899 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4900 /* revalidate device */
4901 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4902 ata_port_schedule_eh(ap
);
4906 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4910 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4911 ata_verify_xfer(qc
);
4913 __ata_qc_complete(qc
);
4915 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4918 /* read result TF if failed or requested */
4919 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4922 __ata_qc_complete(qc
);
4927 * ata_qc_complete_multiple - Complete multiple qcs successfully
4928 * @ap: port in question
4929 * @qc_active: new qc_active mask
4931 * Complete in-flight commands. This functions is meant to be
4932 * called from low-level driver's interrupt routine to complete
4933 * requests normally. ap->qc_active and @qc_active is compared
4934 * and commands are completed accordingly.
4936 * Always use this function when completing multiple NCQ commands
4937 * from IRQ handlers instead of calling ata_qc_complete()
4938 * multiple times to keep IRQ expect status properly in sync.
4941 * spin_lock_irqsave(host lock)
4944 * Number of completed commands on success, -errno otherwise.
4946 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
4951 done_mask
= ap
->qc_active
^ qc_active
;
4953 if (unlikely(done_mask
& qc_active
)) {
4954 ata_port_err(ap
, "illegal qc_active transition (%08x->%08x)\n",
4955 ap
->qc_active
, qc_active
);
4960 struct ata_queued_cmd
*qc
;
4961 unsigned int tag
= __ffs(done_mask
);
4963 qc
= ata_qc_from_tag(ap
, tag
);
4965 ata_qc_complete(qc
);
4968 done_mask
&= ~(1 << tag
);
4975 * ata_qc_issue - issue taskfile to device
4976 * @qc: command to issue to device
4978 * Prepare an ATA command to submission to device.
4979 * This includes mapping the data into a DMA-able
4980 * area, filling in the S/G table, and finally
4981 * writing the taskfile to hardware, starting the command.
4984 * spin_lock_irqsave(host lock)
4986 void ata_qc_issue(struct ata_queued_cmd
*qc
)
4988 struct ata_port
*ap
= qc
->ap
;
4989 struct ata_link
*link
= qc
->dev
->link
;
4990 u8 prot
= qc
->tf
.protocol
;
4992 /* Make sure only one non-NCQ command is outstanding. The
4993 * check is skipped for old EH because it reuses active qc to
4994 * request ATAPI sense.
4996 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
4998 if (ata_is_ncq(prot
)) {
4999 WARN_ON_ONCE(link
->sactive
& (1 << qc
->tag
));
5002 ap
->nr_active_links
++;
5003 link
->sactive
|= 1 << qc
->tag
;
5005 WARN_ON_ONCE(link
->sactive
);
5007 ap
->nr_active_links
++;
5008 link
->active_tag
= qc
->tag
;
5011 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5012 ap
->qc_active
|= 1 << qc
->tag
;
5015 * We guarantee to LLDs that they will have at least one
5016 * non-zero sg if the command is a data command.
5018 if (WARN_ON_ONCE(ata_is_data(prot
) &&
5019 (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
)))
5022 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5023 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
5024 if (ata_sg_setup(qc
))
5027 /* if device is sleeping, schedule reset and abort the link */
5028 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5029 link
->eh_info
.action
|= ATA_EH_RESET
;
5030 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5031 ata_link_abort(link
);
5035 ap
->ops
->qc_prep(qc
);
5037 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5038 if (unlikely(qc
->err_mask
))
5043 qc
->err_mask
|= AC_ERR_SYSTEM
;
5045 ata_qc_complete(qc
);
5049 * sata_scr_valid - test whether SCRs are accessible
5050 * @link: ATA link to test SCR accessibility for
5052 * Test whether SCRs are accessible for @link.
5058 * 1 if SCRs are accessible, 0 otherwise.
5060 int sata_scr_valid(struct ata_link
*link
)
5062 struct ata_port
*ap
= link
->ap
;
5064 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5068 * sata_scr_read - read SCR register of the specified port
5069 * @link: ATA link to read SCR for
5071 * @val: Place to store read value
5073 * Read SCR register @reg of @link into *@val. This function is
5074 * guaranteed to succeed if @link is ap->link, the cable type of
5075 * the port is SATA and the port implements ->scr_read.
5078 * None if @link is ap->link. Kernel thread context otherwise.
5081 * 0 on success, negative errno on failure.
5083 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5085 if (ata_is_host_link(link
)) {
5086 if (sata_scr_valid(link
))
5087 return link
->ap
->ops
->scr_read(link
, reg
, val
);
5091 return sata_pmp_scr_read(link
, reg
, val
);
5095 * sata_scr_write - write SCR register of the specified port
5096 * @link: ATA link to write SCR for
5097 * @reg: SCR to write
5098 * @val: value to write
5100 * Write @val to SCR register @reg of @link. This function is
5101 * guaranteed to succeed if @link is ap->link, the cable type of
5102 * the port is SATA and the port implements ->scr_read.
5105 * None if @link is ap->link. Kernel thread context otherwise.
5108 * 0 on success, negative errno on failure.
5110 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5112 if (ata_is_host_link(link
)) {
5113 if (sata_scr_valid(link
))
5114 return link
->ap
->ops
->scr_write(link
, reg
, val
);
5118 return sata_pmp_scr_write(link
, reg
, val
);
5122 * sata_scr_write_flush - write SCR register of the specified port and flush
5123 * @link: ATA link to write SCR for
5124 * @reg: SCR to write
5125 * @val: value to write
5127 * This function is identical to sata_scr_write() except that this
5128 * function performs flush after writing to the register.
5131 * None if @link is ap->link. Kernel thread context otherwise.
5134 * 0 on success, negative errno on failure.
5136 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5138 if (ata_is_host_link(link
)) {
5141 if (sata_scr_valid(link
)) {
5142 rc
= link
->ap
->ops
->scr_write(link
, reg
, val
);
5144 rc
= link
->ap
->ops
->scr_read(link
, reg
, &val
);
5150 return sata_pmp_scr_write(link
, reg
, val
);
5154 * ata_phys_link_online - test whether the given link is online
5155 * @link: ATA link to test
5157 * Test whether @link is online. Note that this function returns
5158 * 0 if online status of @link cannot be obtained, so
5159 * ata_link_online(link) != !ata_link_offline(link).
5165 * True if the port online status is available and online.
5167 bool ata_phys_link_online(struct ata_link
*link
)
5171 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5172 ata_sstatus_online(sstatus
))
5178 * ata_phys_link_offline - test whether the given link is offline
5179 * @link: ATA link to test
5181 * Test whether @link is offline. Note that this function
5182 * returns 0 if offline status of @link cannot be obtained, so
5183 * ata_link_online(link) != !ata_link_offline(link).
5189 * True if the port offline status is available and offline.
5191 bool ata_phys_link_offline(struct ata_link
*link
)
5195 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5196 !ata_sstatus_online(sstatus
))
5202 * ata_link_online - test whether the given link is online
5203 * @link: ATA link to test
5205 * Test whether @link is online. This is identical to
5206 * ata_phys_link_online() when there's no slave link. When
5207 * there's a slave link, this function should only be called on
5208 * the master link and will return true if any of M/S links is
5215 * True if the port online status is available and online.
5217 bool ata_link_online(struct ata_link
*link
)
5219 struct ata_link
*slave
= link
->ap
->slave_link
;
5221 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5223 return ata_phys_link_online(link
) ||
5224 (slave
&& ata_phys_link_online(slave
));
5228 * ata_link_offline - test whether the given link is offline
5229 * @link: ATA link to test
5231 * Test whether @link is offline. This is identical to
5232 * ata_phys_link_offline() when there's no slave link. When
5233 * there's a slave link, this function should only be called on
5234 * the master link and will return true if both M/S links are
5241 * True if the port offline status is available and offline.
5243 bool ata_link_offline(struct ata_link
*link
)
5245 struct ata_link
*slave
= link
->ap
->slave_link
;
5247 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5249 return ata_phys_link_offline(link
) &&
5250 (!slave
|| ata_phys_link_offline(slave
));
5254 static int ata_port_request_pm(struct ata_port
*ap
, pm_message_t mesg
,
5255 unsigned int action
, unsigned int ehi_flags
,
5258 struct ata_link
*link
;
5259 unsigned long flags
;
5262 /* Previous resume operation might still be in
5263 * progress. Wait for PM_PENDING to clear.
5265 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5266 ata_port_wait_eh(ap
);
5267 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5270 /* request PM ops to EH */
5271 spin_lock_irqsave(ap
->lock
, flags
);
5276 ap
->pm_result
= &rc
;
5279 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5280 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5281 link
->eh_info
.action
|= action
;
5282 link
->eh_info
.flags
|= ehi_flags
;
5285 ata_port_schedule_eh(ap
);
5287 spin_unlock_irqrestore(ap
->lock
, flags
);
5289 /* wait and check result */
5291 ata_port_wait_eh(ap
);
5292 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5298 static int ata_port_suspend_common(struct device
*dev
, pm_message_t mesg
)
5300 struct ata_port
*ap
= to_ata_port(dev
);
5301 unsigned int ehi_flags
= ATA_EHI_QUIET
;
5305 * On some hardware, device fails to respond after spun down
5306 * for suspend. As the device won't be used before being
5307 * resumed, we don't need to touch the device. Ask EH to skip
5308 * the usual stuff and proceed directly to suspend.
5310 * http://thread.gmane.org/gmane.linux.ide/46764
5312 if (mesg
.event
== PM_EVENT_SUSPEND
)
5313 ehi_flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_NO_RECOVERY
;
5315 rc
= ata_port_request_pm(ap
, mesg
, 0, ehi_flags
, 1);
5319 static int ata_port_suspend(struct device
*dev
)
5321 if (pm_runtime_suspended(dev
))
5324 return ata_port_suspend_common(dev
, PMSG_SUSPEND
);
5327 static int ata_port_do_freeze(struct device
*dev
)
5329 if (pm_runtime_suspended(dev
))
5330 pm_runtime_resume(dev
);
5332 return ata_port_suspend_common(dev
, PMSG_FREEZE
);
5335 static int ata_port_poweroff(struct device
*dev
)
5337 if (pm_runtime_suspended(dev
))
5340 return ata_port_suspend_common(dev
, PMSG_HIBERNATE
);
5343 static int ata_port_resume_common(struct device
*dev
)
5345 struct ata_port
*ap
= to_ata_port(dev
);
5348 rc
= ata_port_request_pm(ap
, PMSG_ON
, ATA_EH_RESET
,
5349 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, 1);
5353 static int ata_port_resume(struct device
*dev
)
5357 rc
= ata_port_resume_common(dev
);
5359 pm_runtime_disable(dev
);
5360 pm_runtime_set_active(dev
);
5361 pm_runtime_enable(dev
);
5367 static int ata_port_runtime_idle(struct device
*dev
)
5369 return pm_runtime_suspend(dev
);
5372 static const struct dev_pm_ops ata_port_pm_ops
= {
5373 .suspend
= ata_port_suspend
,
5374 .resume
= ata_port_resume
,
5375 .freeze
= ata_port_do_freeze
,
5376 .thaw
= ata_port_resume
,
5377 .poweroff
= ata_port_poweroff
,
5378 .restore
= ata_port_resume
,
5380 .runtime_suspend
= ata_port_suspend
,
5381 .runtime_resume
= ata_port_resume_common
,
5382 .runtime_idle
= ata_port_runtime_idle
,
5386 * ata_host_suspend - suspend host
5387 * @host: host to suspend
5390 * Suspend @host. Actual operation is performed by port suspend.
5392 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5394 host
->dev
->power
.power_state
= mesg
;
5399 * ata_host_resume - resume host
5400 * @host: host to resume
5402 * Resume @host. Actual operation is performed by port resume.
5404 void ata_host_resume(struct ata_host
*host
)
5406 host
->dev
->power
.power_state
= PMSG_ON
;
5410 struct device_type ata_port_type
= {
5413 .pm
= &ata_port_pm_ops
,
5418 * ata_dev_init - Initialize an ata_device structure
5419 * @dev: Device structure to initialize
5421 * Initialize @dev in preparation for probing.
5424 * Inherited from caller.
5426 void ata_dev_init(struct ata_device
*dev
)
5428 struct ata_link
*link
= ata_dev_phys_link(dev
);
5429 struct ata_port
*ap
= link
->ap
;
5430 unsigned long flags
;
5432 /* SATA spd limit is bound to the attached device, reset together */
5433 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5436 /* High bits of dev->flags are used to record warm plug
5437 * requests which occur asynchronously. Synchronize using
5440 spin_lock_irqsave(ap
->lock
, flags
);
5441 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5443 spin_unlock_irqrestore(ap
->lock
, flags
);
5445 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5446 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5447 dev
->pio_mask
= UINT_MAX
;
5448 dev
->mwdma_mask
= UINT_MAX
;
5449 dev
->udma_mask
= UINT_MAX
;
5453 * ata_link_init - Initialize an ata_link structure
5454 * @ap: ATA port link is attached to
5455 * @link: Link structure to initialize
5456 * @pmp: Port multiplier port number
5461 * Kernel thread context (may sleep)
5463 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5467 /* clear everything except for devices */
5468 memset((void *)link
+ ATA_LINK_CLEAR_BEGIN
, 0,
5469 ATA_LINK_CLEAR_END
- ATA_LINK_CLEAR_BEGIN
);
5473 link
->active_tag
= ATA_TAG_POISON
;
5474 link
->hw_sata_spd_limit
= UINT_MAX
;
5476 /* can't use iterator, ap isn't initialized yet */
5477 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5478 struct ata_device
*dev
= &link
->device
[i
];
5481 dev
->devno
= dev
- link
->device
;
5482 #ifdef CONFIG_ATA_ACPI
5483 dev
->gtf_filter
= ata_acpi_gtf_filter
;
5490 * sata_link_init_spd - Initialize link->sata_spd_limit
5491 * @link: Link to configure sata_spd_limit for
5493 * Initialize @link->[hw_]sata_spd_limit to the currently
5497 * Kernel thread context (may sleep).
5500 * 0 on success, -errno on failure.
5502 int sata_link_init_spd(struct ata_link
*link
)
5507 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5511 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5513 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5515 ata_force_link_limits(link
);
5517 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5523 * ata_port_alloc - allocate and initialize basic ATA port resources
5524 * @host: ATA host this allocated port belongs to
5526 * Allocate and initialize basic ATA port resources.
5529 * Allocate ATA port on success, NULL on failure.
5532 * Inherited from calling layer (may sleep).
5534 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5536 struct ata_port
*ap
;
5540 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5544 ap
->pflags
|= ATA_PFLAG_INITIALIZING
| ATA_PFLAG_FROZEN
;
5545 ap
->lock
= &host
->lock
;
5548 ap
->dev
= host
->dev
;
5550 #if defined(ATA_VERBOSE_DEBUG)
5551 /* turn on all debugging levels */
5552 ap
->msg_enable
= 0x00FF;
5553 #elif defined(ATA_DEBUG)
5554 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5556 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5559 mutex_init(&ap
->scsi_scan_mutex
);
5560 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5561 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5562 INIT_LIST_HEAD(&ap
->eh_done_q
);
5563 init_waitqueue_head(&ap
->eh_wait_q
);
5564 init_completion(&ap
->park_req_pending
);
5565 init_timer_deferrable(&ap
->fastdrain_timer
);
5566 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5567 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5569 ap
->cbl
= ATA_CBL_NONE
;
5571 ata_link_init(ap
, &ap
->link
, 0);
5574 ap
->stats
.unhandled_irq
= 1;
5575 ap
->stats
.idle_irq
= 1;
5577 ata_sff_port_init(ap
);
5582 static void ata_host_release(struct device
*gendev
, void *res
)
5584 struct ata_host
*host
= dev_get_drvdata(gendev
);
5587 for (i
= 0; i
< host
->n_ports
; i
++) {
5588 struct ata_port
*ap
= host
->ports
[i
];
5594 scsi_host_put(ap
->scsi_host
);
5596 kfree(ap
->pmp_link
);
5597 kfree(ap
->slave_link
);
5599 host
->ports
[i
] = NULL
;
5602 dev_set_drvdata(gendev
, NULL
);
5606 * ata_host_alloc - allocate and init basic ATA host resources
5607 * @dev: generic device this host is associated with
5608 * @max_ports: maximum number of ATA ports associated with this host
5610 * Allocate and initialize basic ATA host resources. LLD calls
5611 * this function to allocate a host, initializes it fully and
5612 * attaches it using ata_host_register().
5614 * @max_ports ports are allocated and host->n_ports is
5615 * initialized to @max_ports. The caller is allowed to decrease
5616 * host->n_ports before calling ata_host_register(). The unused
5617 * ports will be automatically freed on registration.
5620 * Allocate ATA host on success, NULL on failure.
5623 * Inherited from calling layer (may sleep).
5625 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5627 struct ata_host
*host
;
5633 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5636 /* alloc a container for our list of ATA ports (buses) */
5637 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5638 /* alloc a container for our list of ATA ports (buses) */
5639 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5643 devres_add(dev
, host
);
5644 dev_set_drvdata(dev
, host
);
5646 spin_lock_init(&host
->lock
);
5647 mutex_init(&host
->eh_mutex
);
5649 host
->n_ports
= max_ports
;
5651 /* allocate ports bound to this host */
5652 for (i
= 0; i
< max_ports
; i
++) {
5653 struct ata_port
*ap
;
5655 ap
= ata_port_alloc(host
);
5660 host
->ports
[i
] = ap
;
5663 devres_remove_group(dev
, NULL
);
5667 devres_release_group(dev
, NULL
);
5672 * ata_host_alloc_pinfo - alloc host and init with port_info array
5673 * @dev: generic device this host is associated with
5674 * @ppi: array of ATA port_info to initialize host with
5675 * @n_ports: number of ATA ports attached to this host
5677 * Allocate ATA host and initialize with info from @ppi. If NULL
5678 * terminated, @ppi may contain fewer entries than @n_ports. The
5679 * last entry will be used for the remaining ports.
5682 * Allocate ATA host on success, NULL on failure.
5685 * Inherited from calling layer (may sleep).
5687 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5688 const struct ata_port_info
* const * ppi
,
5691 const struct ata_port_info
*pi
;
5692 struct ata_host
*host
;
5695 host
= ata_host_alloc(dev
, n_ports
);
5699 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5700 struct ata_port
*ap
= host
->ports
[i
];
5705 ap
->pio_mask
= pi
->pio_mask
;
5706 ap
->mwdma_mask
= pi
->mwdma_mask
;
5707 ap
->udma_mask
= pi
->udma_mask
;
5708 ap
->flags
|= pi
->flags
;
5709 ap
->link
.flags
|= pi
->link_flags
;
5710 ap
->ops
= pi
->port_ops
;
5712 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5713 host
->ops
= pi
->port_ops
;
5720 * ata_slave_link_init - initialize slave link
5721 * @ap: port to initialize slave link for
5723 * Create and initialize slave link for @ap. This enables slave
5724 * link handling on the port.
5726 * In libata, a port contains links and a link contains devices.
5727 * There is single host link but if a PMP is attached to it,
5728 * there can be multiple fan-out links. On SATA, there's usually
5729 * a single device connected to a link but PATA and SATA
5730 * controllers emulating TF based interface can have two - master
5733 * However, there are a few controllers which don't fit into this
5734 * abstraction too well - SATA controllers which emulate TF
5735 * interface with both master and slave devices but also have
5736 * separate SCR register sets for each device. These controllers
5737 * need separate links for physical link handling
5738 * (e.g. onlineness, link speed) but should be treated like a
5739 * traditional M/S controller for everything else (e.g. command
5740 * issue, softreset).
5742 * slave_link is libata's way of handling this class of
5743 * controllers without impacting core layer too much. For
5744 * anything other than physical link handling, the default host
5745 * link is used for both master and slave. For physical link
5746 * handling, separate @ap->slave_link is used. All dirty details
5747 * are implemented inside libata core layer. From LLD's POV, the
5748 * only difference is that prereset, hardreset and postreset are
5749 * called once more for the slave link, so the reset sequence
5750 * looks like the following.
5752 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5753 * softreset(M) -> postreset(M) -> postreset(S)
5755 * Note that softreset is called only for the master. Softreset
5756 * resets both M/S by definition, so SRST on master should handle
5757 * both (the standard method will work just fine).
5760 * Should be called before host is registered.
5763 * 0 on success, -errno on failure.
5765 int ata_slave_link_init(struct ata_port
*ap
)
5767 struct ata_link
*link
;
5769 WARN_ON(ap
->slave_link
);
5770 WARN_ON(ap
->flags
& ATA_FLAG_PMP
);
5772 link
= kzalloc(sizeof(*link
), GFP_KERNEL
);
5776 ata_link_init(ap
, link
, 1);
5777 ap
->slave_link
= link
;
5781 static void ata_host_stop(struct device
*gendev
, void *res
)
5783 struct ata_host
*host
= dev_get_drvdata(gendev
);
5786 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5788 for (i
= 0; i
< host
->n_ports
; i
++) {
5789 struct ata_port
*ap
= host
->ports
[i
];
5791 if (ap
->ops
->port_stop
)
5792 ap
->ops
->port_stop(ap
);
5795 if (host
->ops
->host_stop
)
5796 host
->ops
->host_stop(host
);
5800 * ata_finalize_port_ops - finalize ata_port_operations
5801 * @ops: ata_port_operations to finalize
5803 * An ata_port_operations can inherit from another ops and that
5804 * ops can again inherit from another. This can go on as many
5805 * times as necessary as long as there is no loop in the
5806 * inheritance chain.
5808 * Ops tables are finalized when the host is started. NULL or
5809 * unspecified entries are inherited from the closet ancestor
5810 * which has the method and the entry is populated with it.
5811 * After finalization, the ops table directly points to all the
5812 * methods and ->inherits is no longer necessary and cleared.
5814 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5819 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5821 static DEFINE_SPINLOCK(lock
);
5822 const struct ata_port_operations
*cur
;
5823 void **begin
= (void **)ops
;
5824 void **end
= (void **)&ops
->inherits
;
5827 if (!ops
|| !ops
->inherits
)
5832 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5833 void **inherit
= (void **)cur
;
5835 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5840 for (pp
= begin
; pp
< end
; pp
++)
5844 ops
->inherits
= NULL
;
5850 * ata_host_start - start and freeze ports of an ATA host
5851 * @host: ATA host to start ports for
5853 * Start and then freeze ports of @host. Started status is
5854 * recorded in host->flags, so this function can be called
5855 * multiple times. Ports are guaranteed to get started only
5856 * once. If host->ops isn't initialized yet, its set to the
5857 * first non-dummy port ops.
5860 * Inherited from calling layer (may sleep).
5863 * 0 if all ports are started successfully, -errno otherwise.
5865 int ata_host_start(struct ata_host
*host
)
5868 void *start_dr
= NULL
;
5871 if (host
->flags
& ATA_HOST_STARTED
)
5874 ata_finalize_port_ops(host
->ops
);
5876 for (i
= 0; i
< host
->n_ports
; i
++) {
5877 struct ata_port
*ap
= host
->ports
[i
];
5879 ata_finalize_port_ops(ap
->ops
);
5881 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5882 host
->ops
= ap
->ops
;
5884 if (ap
->ops
->port_stop
)
5888 if (host
->ops
->host_stop
)
5892 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5897 for (i
= 0; i
< host
->n_ports
; i
++) {
5898 struct ata_port
*ap
= host
->ports
[i
];
5900 if (ap
->ops
->port_start
) {
5901 rc
= ap
->ops
->port_start(ap
);
5905 "failed to start port %d (errno=%d)\n",
5910 ata_eh_freeze_port(ap
);
5914 devres_add(host
->dev
, start_dr
);
5915 host
->flags
|= ATA_HOST_STARTED
;
5920 struct ata_port
*ap
= host
->ports
[i
];
5922 if (ap
->ops
->port_stop
)
5923 ap
->ops
->port_stop(ap
);
5925 devres_free(start_dr
);
5930 * ata_sas_host_init - Initialize a host struct
5931 * @host: host to initialize
5932 * @dev: device host is attached to
5933 * @flags: host flags
5937 * PCI/etc. bus probe sem.
5940 /* KILLME - the only user left is ipr */
5941 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5942 unsigned long flags
, struct ata_port_operations
*ops
)
5944 spin_lock_init(&host
->lock
);
5945 mutex_init(&host
->eh_mutex
);
5947 host
->flags
= flags
;
5951 void __ata_port_probe(struct ata_port
*ap
)
5953 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
5954 unsigned long flags
;
5956 /* kick EH for boot probing */
5957 spin_lock_irqsave(ap
->lock
, flags
);
5959 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
5960 ehi
->action
|= ATA_EH_RESET
;
5961 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
5963 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
5964 ap
->pflags
|= ATA_PFLAG_LOADING
;
5965 ata_port_schedule_eh(ap
);
5967 spin_unlock_irqrestore(ap
->lock
, flags
);
5970 int ata_port_probe(struct ata_port
*ap
)
5974 if (ap
->ops
->error_handler
) {
5975 __ata_port_probe(ap
);
5976 ata_port_wait_eh(ap
);
5978 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
5979 rc
= ata_bus_probe(ap
);
5980 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
5986 static void async_port_probe(void *data
, async_cookie_t cookie
)
5988 struct ata_port
*ap
= data
;
5991 * If we're not allowed to scan this host in parallel,
5992 * we need to wait until all previous scans have completed
5993 * before going further.
5994 * Jeff Garzik says this is only within a controller, so we
5995 * don't need to wait for port 0, only for later ports.
5997 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
5998 async_synchronize_cookie(cookie
);
6000 (void)ata_port_probe(ap
);
6002 /* in order to keep device order, we need to synchronize at this point */
6003 async_synchronize_cookie(cookie
);
6005 ata_scsi_scan_host(ap
, 1);
6009 * ata_host_register - register initialized ATA host
6010 * @host: ATA host to register
6011 * @sht: template for SCSI host
6013 * Register initialized ATA host. @host is allocated using
6014 * ata_host_alloc() and fully initialized by LLD. This function
6015 * starts ports, registers @host with ATA and SCSI layers and
6016 * probe registered devices.
6019 * Inherited from calling layer (may sleep).
6022 * 0 on success, -errno otherwise.
6024 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6028 /* host must have been started */
6029 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6030 dev_err(host
->dev
, "BUG: trying to register unstarted host\n");
6035 /* Blow away unused ports. This happens when LLD can't
6036 * determine the exact number of ports to allocate at
6039 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6040 kfree(host
->ports
[i
]);
6042 /* give ports names and add SCSI hosts */
6043 for (i
= 0; i
< host
->n_ports
; i
++)
6044 host
->ports
[i
]->print_id
= atomic_inc_return(&ata_print_id
);
6047 /* Create associated sysfs transport objects */
6048 for (i
= 0; i
< host
->n_ports
; i
++) {
6049 rc
= ata_tport_add(host
->dev
,host
->ports
[i
]);
6055 rc
= ata_scsi_add_hosts(host
, sht
);
6059 /* set cable, sata_spd_limit and report */
6060 for (i
= 0; i
< host
->n_ports
; i
++) {
6061 struct ata_port
*ap
= host
->ports
[i
];
6062 unsigned long xfer_mask
;
6064 /* set SATA cable type if still unset */
6065 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6066 ap
->cbl
= ATA_CBL_SATA
;
6068 /* init sata_spd_limit to the current value */
6069 sata_link_init_spd(&ap
->link
);
6071 sata_link_init_spd(ap
->slave_link
);
6073 /* print per-port info to dmesg */
6074 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6077 if (!ata_port_is_dummy(ap
)) {
6078 ata_port_info(ap
, "%cATA max %s %s\n",
6079 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6080 ata_mode_string(xfer_mask
),
6081 ap
->link
.eh_info
.desc
);
6082 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6084 ata_port_info(ap
, "DUMMY\n");
6087 /* perform each probe asynchronously */
6088 for (i
= 0; i
< host
->n_ports
; i
++) {
6089 struct ata_port
*ap
= host
->ports
[i
];
6090 async_schedule(async_port_probe
, ap
);
6097 ata_tport_delete(host
->ports
[i
]);
6104 * ata_host_activate - start host, request IRQ and register it
6105 * @host: target ATA host
6106 * @irq: IRQ to request
6107 * @irq_handler: irq_handler used when requesting IRQ
6108 * @irq_flags: irq_flags used when requesting IRQ
6109 * @sht: scsi_host_template to use when registering the host
6111 * After allocating an ATA host and initializing it, most libata
6112 * LLDs perform three steps to activate the host - start host,
6113 * request IRQ and register it. This helper takes necessasry
6114 * arguments and performs the three steps in one go.
6116 * An invalid IRQ skips the IRQ registration and expects the host to
6117 * have set polling mode on the port. In this case, @irq_handler
6121 * Inherited from calling layer (may sleep).
6124 * 0 on success, -errno otherwise.
6126 int ata_host_activate(struct ata_host
*host
, int irq
,
6127 irq_handler_t irq_handler
, unsigned long irq_flags
,
6128 struct scsi_host_template
*sht
)
6132 rc
= ata_host_start(host
);
6136 /* Special case for polling mode */
6138 WARN_ON(irq_handler
);
6139 return ata_host_register(host
, sht
);
6142 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6143 dev_driver_string(host
->dev
), host
);
6147 for (i
= 0; i
< host
->n_ports
; i
++)
6148 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6150 rc
= ata_host_register(host
, sht
);
6151 /* if failed, just free the IRQ and leave ports alone */
6153 devm_free_irq(host
->dev
, irq
, host
);
6159 * ata_port_detach - Detach ATA port in prepration of device removal
6160 * @ap: ATA port to be detached
6162 * Detach all ATA devices and the associated SCSI devices of @ap;
6163 * then, remove the associated SCSI host. @ap is guaranteed to
6164 * be quiescent on return from this function.
6167 * Kernel thread context (may sleep).
6169 static void ata_port_detach(struct ata_port
*ap
)
6171 unsigned long flags
;
6173 if (!ap
->ops
->error_handler
)
6176 /* tell EH we're leaving & flush EH */
6177 spin_lock_irqsave(ap
->lock
, flags
);
6178 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6179 ata_port_schedule_eh(ap
);
6180 spin_unlock_irqrestore(ap
->lock
, flags
);
6182 /* wait till EH commits suicide */
6183 ata_port_wait_eh(ap
);
6185 /* it better be dead now */
6186 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
6188 cancel_delayed_work_sync(&ap
->hotplug_task
);
6193 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
6194 ata_tlink_delete(&ap
->pmp_link
[i
]);
6196 ata_tport_delete(ap
);
6198 /* remove the associated SCSI host */
6199 scsi_remove_host(ap
->scsi_host
);
6203 * ata_host_detach - Detach all ports of an ATA host
6204 * @host: Host to detach
6206 * Detach all ports of @host.
6209 * Kernel thread context (may sleep).
6211 void ata_host_detach(struct ata_host
*host
)
6215 for (i
= 0; i
< host
->n_ports
; i
++)
6216 ata_port_detach(host
->ports
[i
]);
6218 /* the host is dead now, dissociate ACPI */
6219 ata_acpi_dissociate(host
);
6225 * ata_pci_remove_one - PCI layer callback for device removal
6226 * @pdev: PCI device that was removed
6228 * PCI layer indicates to libata via this hook that hot-unplug or
6229 * module unload event has occurred. Detach all ports. Resource
6230 * release is handled via devres.
6233 * Inherited from PCI layer (may sleep).
6235 void ata_pci_remove_one(struct pci_dev
*pdev
)
6237 struct device
*dev
= &pdev
->dev
;
6238 struct ata_host
*host
= dev_get_drvdata(dev
);
6240 ata_host_detach(host
);
6243 /* move to PCI subsystem */
6244 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6246 unsigned long tmp
= 0;
6248 switch (bits
->width
) {
6251 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6257 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6263 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6274 return (tmp
== bits
->val
) ? 1 : 0;
6278 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6280 pci_save_state(pdev
);
6281 pci_disable_device(pdev
);
6283 if (mesg
.event
& PM_EVENT_SLEEP
)
6284 pci_set_power_state(pdev
, PCI_D3hot
);
6287 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6291 pci_set_power_state(pdev
, PCI_D0
);
6292 pci_restore_state(pdev
);
6294 rc
= pcim_enable_device(pdev
);
6297 "failed to enable device after resume (%d)\n", rc
);
6301 pci_set_master(pdev
);
6305 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6307 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6310 rc
= ata_host_suspend(host
, mesg
);
6314 ata_pci_device_do_suspend(pdev
, mesg
);
6319 int ata_pci_device_resume(struct pci_dev
*pdev
)
6321 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6324 rc
= ata_pci_device_do_resume(pdev
);
6326 ata_host_resume(host
);
6329 #endif /* CONFIG_PM */
6331 #endif /* CONFIG_PCI */
6333 static int __init
ata_parse_force_one(char **cur
,
6334 struct ata_force_ent
*force_ent
,
6335 const char **reason
)
6337 /* FIXME: Currently, there's no way to tag init const data and
6338 * using __initdata causes build failure on some versions of
6339 * gcc. Once __initdataconst is implemented, add const to the
6340 * following structure.
6342 static struct ata_force_param force_tbl
[] __initdata
= {
6343 { "40c", .cbl
= ATA_CBL_PATA40
},
6344 { "80c", .cbl
= ATA_CBL_PATA80
},
6345 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6346 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6347 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6348 { "sata", .cbl
= ATA_CBL_SATA
},
6349 { "1.5Gbps", .spd_limit
= 1 },
6350 { "3.0Gbps", .spd_limit
= 2 },
6351 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6352 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6353 { "dump_id", .horkage_on
= ATA_HORKAGE_DUMP_ID
},
6354 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6355 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6356 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6357 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6358 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6359 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6360 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6361 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6362 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6363 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6364 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6365 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6366 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6367 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6368 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6369 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6370 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6371 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6372 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6373 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6374 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6375 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6376 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6377 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6378 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6379 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6380 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6381 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6382 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6383 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6384 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6385 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6386 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6387 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6388 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6389 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6390 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6392 char *start
= *cur
, *p
= *cur
;
6393 char *id
, *val
, *endp
;
6394 const struct ata_force_param
*match_fp
= NULL
;
6395 int nr_matches
= 0, i
;
6397 /* find where this param ends and update *cur */
6398 while (*p
!= '\0' && *p
!= ',')
6409 p
= strchr(start
, ':');
6411 val
= strstrip(start
);
6416 id
= strstrip(start
);
6417 val
= strstrip(p
+ 1);
6420 p
= strchr(id
, '.');
6423 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6424 if (p
== endp
|| *endp
!= '\0') {
6425 *reason
= "invalid device";
6430 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6431 if (p
== endp
|| *endp
!= '\0') {
6432 *reason
= "invalid port/link";
6437 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6438 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6439 const struct ata_force_param
*fp
= &force_tbl
[i
];
6441 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6447 if (strcasecmp(val
, fp
->name
) == 0) {
6454 *reason
= "unknown value";
6457 if (nr_matches
> 1) {
6458 *reason
= "ambigious value";
6462 force_ent
->param
= *match_fp
;
6467 static void __init
ata_parse_force_param(void)
6469 int idx
= 0, size
= 1;
6470 int last_port
= -1, last_device
= -1;
6471 char *p
, *cur
, *next
;
6473 /* calculate maximum number of params and allocate force_tbl */
6474 for (p
= ata_force_param_buf
; *p
; p
++)
6478 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6479 if (!ata_force_tbl
) {
6480 printk(KERN_WARNING
"ata: failed to extend force table, "
6481 "libata.force ignored\n");
6485 /* parse and populate the table */
6486 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6487 const char *reason
= "";
6488 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6491 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6492 printk(KERN_WARNING
"ata: failed to parse force "
6493 "parameter \"%s\" (%s)\n",
6498 if (te
.port
== -1) {
6499 te
.port
= last_port
;
6500 te
.device
= last_device
;
6503 ata_force_tbl
[idx
++] = te
;
6505 last_port
= te
.port
;
6506 last_device
= te
.device
;
6509 ata_force_tbl_size
= idx
;
6512 static int __init
ata_init(void)
6516 ata_parse_force_param();
6518 ata_acpi_register();
6520 rc
= ata_sff_init();
6522 kfree(ata_force_tbl
);
6526 libata_transport_init();
6527 ata_scsi_transport_template
= ata_attach_transport();
6528 if (!ata_scsi_transport_template
) {
6534 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6541 static void __exit
ata_exit(void)
6543 ata_release_transport(ata_scsi_transport_template
);
6544 libata_transport_exit();
6546 ata_acpi_unregister();
6547 kfree(ata_force_tbl
);
6550 subsys_initcall(ata_init
);
6551 module_exit(ata_exit
);
6553 static DEFINE_RATELIMIT_STATE(ratelimit
, HZ
/ 5, 1);
6555 int ata_ratelimit(void)
6557 return __ratelimit(&ratelimit
);
6561 * ata_msleep - ATA EH owner aware msleep
6562 * @ap: ATA port to attribute the sleep to
6563 * @msecs: duration to sleep in milliseconds
6565 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6566 * ownership is released before going to sleep and reacquired
6567 * after the sleep is complete. IOW, other ports sharing the
6568 * @ap->host will be allowed to own the EH while this task is
6574 void ata_msleep(struct ata_port
*ap
, unsigned int msecs
)
6576 bool owns_eh
= ap
&& ap
->host
->eh_owner
== current
;
6588 * ata_wait_register - wait until register value changes
6589 * @ap: ATA port to wait register for, can be NULL
6590 * @reg: IO-mapped register
6591 * @mask: Mask to apply to read register value
6592 * @val: Wait condition
6593 * @interval: polling interval in milliseconds
6594 * @timeout: timeout in milliseconds
6596 * Waiting for some bits of register to change is a common
6597 * operation for ATA controllers. This function reads 32bit LE
6598 * IO-mapped register @reg and tests for the following condition.
6600 * (*@reg & mask) != val
6602 * If the condition is met, it returns; otherwise, the process is
6603 * repeated after @interval_msec until timeout.
6606 * Kernel thread context (may sleep)
6609 * The final register value.
6611 u32
ata_wait_register(struct ata_port
*ap
, void __iomem
*reg
, u32 mask
, u32 val
,
6612 unsigned long interval
, unsigned long timeout
)
6614 unsigned long deadline
;
6617 tmp
= ioread32(reg
);
6619 /* Calculate timeout _after_ the first read to make sure
6620 * preceding writes reach the controller before starting to
6621 * eat away the timeout.
6623 deadline
= ata_deadline(jiffies
, timeout
);
6625 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6626 ata_msleep(ap
, interval
);
6627 tmp
= ioread32(reg
);
6636 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6638 return AC_ERR_SYSTEM
;
6641 static void ata_dummy_error_handler(struct ata_port
*ap
)
6646 struct ata_port_operations ata_dummy_port_ops
= {
6647 .qc_prep
= ata_noop_qc_prep
,
6648 .qc_issue
= ata_dummy_qc_issue
,
6649 .error_handler
= ata_dummy_error_handler
,
6650 .sched_eh
= ata_std_sched_eh
,
6651 .end_eh
= ata_std_end_eh
,
6654 const struct ata_port_info ata_dummy_port_info
= {
6655 .port_ops
= &ata_dummy_port_ops
,
6659 * Utility print functions
6661 int ata_port_printk(const struct ata_port
*ap
, const char *level
,
6662 const char *fmt
, ...)
6664 struct va_format vaf
;
6668 va_start(args
, fmt
);
6673 r
= printk("%sata%u: %pV", level
, ap
->print_id
, &vaf
);
6679 EXPORT_SYMBOL(ata_port_printk
);
6681 int ata_link_printk(const struct ata_link
*link
, const char *level
,
6682 const char *fmt
, ...)
6684 struct va_format vaf
;
6688 va_start(args
, fmt
);
6693 if (sata_pmp_attached(link
->ap
) || link
->ap
->slave_link
)
6694 r
= printk("%sata%u.%02u: %pV",
6695 level
, link
->ap
->print_id
, link
->pmp
, &vaf
);
6697 r
= printk("%sata%u: %pV",
6698 level
, link
->ap
->print_id
, &vaf
);
6704 EXPORT_SYMBOL(ata_link_printk
);
6706 int ata_dev_printk(const struct ata_device
*dev
, const char *level
,
6707 const char *fmt
, ...)
6709 struct va_format vaf
;
6713 va_start(args
, fmt
);
6718 r
= printk("%sata%u.%02u: %pV",
6719 level
, dev
->link
->ap
->print_id
, dev
->link
->pmp
+ dev
->devno
,
6726 EXPORT_SYMBOL(ata_dev_printk
);
6728 void ata_print_version(const struct device
*dev
, const char *version
)
6730 dev_printk(KERN_DEBUG
, dev
, "version %s\n", version
);
6732 EXPORT_SYMBOL(ata_print_version
);
6735 * libata is essentially a library of internal helper functions for
6736 * low-level ATA host controller drivers. As such, the API/ABI is
6737 * likely to change as new drivers are added and updated.
6738 * Do not depend on ABI/API stability.
6740 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6741 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6742 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6743 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6744 EXPORT_SYMBOL_GPL(sata_port_ops
);
6745 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6746 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6747 EXPORT_SYMBOL_GPL(ata_link_next
);
6748 EXPORT_SYMBOL_GPL(ata_dev_next
);
6749 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6750 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity
);
6751 EXPORT_SYMBOL_GPL(ata_host_init
);
6752 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6753 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6754 EXPORT_SYMBOL_GPL(ata_slave_link_init
);
6755 EXPORT_SYMBOL_GPL(ata_host_start
);
6756 EXPORT_SYMBOL_GPL(ata_host_register
);
6757 EXPORT_SYMBOL_GPL(ata_host_activate
);
6758 EXPORT_SYMBOL_GPL(ata_host_detach
);
6759 EXPORT_SYMBOL_GPL(ata_sg_init
);
6760 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6761 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6762 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6763 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6764 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6765 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6766 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6767 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6768 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6769 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6770 EXPORT_SYMBOL_GPL(ata_mode_string
);
6771 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6772 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6773 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6774 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6775 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6776 EXPORT_SYMBOL_GPL(sata_set_spd
);
6777 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6778 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6779 EXPORT_SYMBOL_GPL(sata_link_resume
);
6780 EXPORT_SYMBOL_GPL(sata_link_scr_lpm
);
6781 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6782 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6783 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6784 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6785 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6786 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6787 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6788 EXPORT_SYMBOL_GPL(ata_msleep
);
6789 EXPORT_SYMBOL_GPL(ata_wait_register
);
6790 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6791 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6792 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6793 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6794 EXPORT_SYMBOL_GPL(__ata_change_queue_depth
);
6795 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6796 EXPORT_SYMBOL_GPL(sata_scr_read
);
6797 EXPORT_SYMBOL_GPL(sata_scr_write
);
6798 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6799 EXPORT_SYMBOL_GPL(ata_link_online
);
6800 EXPORT_SYMBOL_GPL(ata_link_offline
);
6802 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6803 EXPORT_SYMBOL_GPL(ata_host_resume
);
6804 #endif /* CONFIG_PM */
6805 EXPORT_SYMBOL_GPL(ata_id_string
);
6806 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6807 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6808 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6810 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6811 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6812 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6813 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6814 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6817 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6818 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6820 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6821 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6822 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6823 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6824 #endif /* CONFIG_PM */
6825 #endif /* CONFIG_PCI */
6827 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6828 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6829 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6830 EXPORT_SYMBOL_GPL(ata_port_desc
);
6832 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6833 #endif /* CONFIG_PCI */
6834 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6835 EXPORT_SYMBOL_GPL(ata_link_abort
);
6836 EXPORT_SYMBOL_GPL(ata_port_abort
);
6837 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6838 EXPORT_SYMBOL_GPL(sata_async_notification
);
6839 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6840 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6841 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6842 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6843 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6844 EXPORT_SYMBOL_GPL(ata_do_eh
);
6845 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6847 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6848 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6849 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6850 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6851 EXPORT_SYMBOL_GPL(ata_cable_sata
);