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;
777 tf
->device
= ATA_LBA
;
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 unsigned int err_mask
;
2159 char revbuf
[7]; /* XYZ-99\0 */
2160 char fwrevbuf
[ATA_ID_FW_REV_LEN
+1];
2161 char modelbuf
[ATA_ID_PROD_LEN
+1];
2164 if (!ata_dev_enabled(dev
) && ata_msg_info(ap
)) {
2165 ata_dev_info(dev
, "%s: ENTER/EXIT -- nodev\n", __func__
);
2169 if (ata_msg_probe(ap
))
2170 ata_dev_dbg(dev
, "%s: ENTER\n", __func__
);
2173 dev
->horkage
|= ata_dev_blacklisted(dev
);
2174 ata_force_horkage(dev
);
2176 if (dev
->horkage
& ATA_HORKAGE_DISABLE
) {
2177 ata_dev_info(dev
, "unsupported device, disabling\n");
2178 ata_dev_disable(dev
);
2182 if ((!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) &&
2183 dev
->class == ATA_DEV_ATAPI
) {
2184 ata_dev_warn(dev
, "WARNING: ATAPI is %s, device ignored\n",
2185 atapi_enabled
? "not supported with this driver"
2187 ata_dev_disable(dev
);
2191 rc
= ata_do_link_spd_horkage(dev
);
2195 /* let ACPI work its magic */
2196 rc
= ata_acpi_on_devcfg(dev
);
2200 /* massage HPA, do it early as it might change IDENTIFY data */
2201 rc
= ata_hpa_resize(dev
);
2205 /* print device capabilities */
2206 if (ata_msg_probe(ap
))
2208 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2209 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2211 id
[49], id
[82], id
[83], id
[84],
2212 id
[85], id
[86], id
[87], id
[88]);
2214 /* initialize to-be-configured parameters */
2215 dev
->flags
&= ~ATA_DFLAG_CFG_MASK
;
2216 dev
->max_sectors
= 0;
2222 dev
->multi_count
= 0;
2225 * common ATA, ATAPI feature tests
2228 /* find max transfer mode; for printk only */
2229 xfer_mask
= ata_id_xfermask(id
);
2231 if (ata_msg_probe(ap
))
2234 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2235 ata_id_c_string(dev
->id
, fwrevbuf
, ATA_ID_FW_REV
,
2238 ata_id_c_string(dev
->id
, modelbuf
, ATA_ID_PROD
,
2241 /* ATA-specific feature tests */
2242 if (dev
->class == ATA_DEV_ATA
) {
2243 if (ata_id_is_cfa(id
)) {
2244 /* CPRM may make this media unusable */
2245 if (id
[ATA_ID_CFA_KEY_MGMT
] & 1)
2247 "supports DRM functions and may not be fully accessible\n");
2248 snprintf(revbuf
, 7, "CFA");
2250 snprintf(revbuf
, 7, "ATA-%d", ata_id_major_version(id
));
2251 /* Warn the user if the device has TPM extensions */
2252 if (ata_id_has_tpm(id
))
2254 "supports DRM functions and may not be fully accessible\n");
2257 dev
->n_sectors
= ata_id_n_sectors(id
);
2259 /* get current R/W Multiple count setting */
2260 if ((dev
->id
[47] >> 8) == 0x80 && (dev
->id
[59] & 0x100)) {
2261 unsigned int max
= dev
->id
[47] & 0xff;
2262 unsigned int cnt
= dev
->id
[59] & 0xff;
2263 /* only recognize/allow powers of two here */
2264 if (is_power_of_2(max
) && is_power_of_2(cnt
))
2266 dev
->multi_count
= cnt
;
2269 if (ata_id_has_lba(id
)) {
2270 const char *lba_desc
;
2274 dev
->flags
|= ATA_DFLAG_LBA
;
2275 if (ata_id_has_lba48(id
)) {
2276 dev
->flags
|= ATA_DFLAG_LBA48
;
2279 if (dev
->n_sectors
>= (1UL << 28) &&
2280 ata_id_has_flush_ext(id
))
2281 dev
->flags
|= ATA_DFLAG_FLUSH_EXT
;
2285 rc
= ata_dev_config_ncq(dev
, ncq_desc
, sizeof(ncq_desc
));
2289 /* print device info to dmesg */
2290 if (ata_msg_drv(ap
) && print_info
) {
2291 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2292 revbuf
, modelbuf
, fwrevbuf
,
2293 ata_mode_string(xfer_mask
));
2295 "%llu sectors, multi %u: %s %s\n",
2296 (unsigned long long)dev
->n_sectors
,
2297 dev
->multi_count
, lba_desc
, ncq_desc
);
2302 /* Default translation */
2303 dev
->cylinders
= id
[1];
2305 dev
->sectors
= id
[6];
2307 if (ata_id_current_chs_valid(id
)) {
2308 /* Current CHS translation is valid. */
2309 dev
->cylinders
= id
[54];
2310 dev
->heads
= id
[55];
2311 dev
->sectors
= id
[56];
2314 /* print device info to dmesg */
2315 if (ata_msg_drv(ap
) && print_info
) {
2316 ata_dev_info(dev
, "%s: %s, %s, max %s\n",
2317 revbuf
, modelbuf
, fwrevbuf
,
2318 ata_mode_string(xfer_mask
));
2320 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2321 (unsigned long long)dev
->n_sectors
,
2322 dev
->multi_count
, dev
->cylinders
,
2323 dev
->heads
, dev
->sectors
);
2327 /* check and mark DevSlp capability */
2328 if (ata_id_has_devslp(dev
->id
))
2329 dev
->flags
|= ATA_DFLAG_DEVSLP
;
2331 /* Obtain SATA Settings page from Identify Device Data Log,
2332 * which contains DevSlp timing variables etc.
2333 * Exclude old devices with ata_id_has_ncq()
2335 if (ata_id_has_ncq(dev
->id
)) {
2336 err_mask
= ata_read_log_page(dev
,
2337 ATA_LOG_SATA_ID_DEV_DATA
,
2338 ATA_LOG_SATA_SETTINGS
,
2343 "failed to get Identify Device Data, Emask 0x%x\n",
2350 /* ATAPI-specific feature tests */
2351 else if (dev
->class == ATA_DEV_ATAPI
) {
2352 const char *cdb_intr_string
= "";
2353 const char *atapi_an_string
= "";
2354 const char *dma_dir_string
= "";
2357 rc
= atapi_cdb_len(id
);
2358 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
2359 if (ata_msg_warn(ap
))
2360 ata_dev_warn(dev
, "unsupported CDB len\n");
2364 dev
->cdb_len
= (unsigned int) rc
;
2366 /* Enable ATAPI AN if both the host and device have
2367 * the support. If PMP is attached, SNTF is required
2368 * to enable ATAPI AN to discern between PHY status
2369 * changed notifications and ATAPI ANs.
2372 (ap
->flags
& ATA_FLAG_AN
) && ata_id_has_atapi_AN(id
) &&
2373 (!sata_pmp_attached(ap
) ||
2374 sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
) == 0)) {
2375 /* issue SET feature command to turn this on */
2376 err_mask
= ata_dev_set_feature(dev
,
2377 SETFEATURES_SATA_ENABLE
, SATA_AN
);
2380 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2383 dev
->flags
|= ATA_DFLAG_AN
;
2384 atapi_an_string
= ", ATAPI AN";
2388 if (ata_id_cdb_intr(dev
->id
)) {
2389 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
2390 cdb_intr_string
= ", CDB intr";
2393 if (atapi_dmadir
|| atapi_id_dmadir(dev
->id
)) {
2394 dev
->flags
|= ATA_DFLAG_DMADIR
;
2395 dma_dir_string
= ", DMADIR";
2398 if (ata_id_has_da(dev
->id
))
2399 dev
->flags
|= ATA_DFLAG_DA
;
2401 /* print device info to dmesg */
2402 if (ata_msg_drv(ap
) && print_info
)
2404 "ATAPI: %s, %s, max %s%s%s%s\n",
2406 ata_mode_string(xfer_mask
),
2407 cdb_intr_string
, atapi_an_string
,
2411 /* determine max_sectors */
2412 dev
->max_sectors
= ATA_MAX_SECTORS
;
2413 if (dev
->flags
& ATA_DFLAG_LBA48
)
2414 dev
->max_sectors
= ATA_MAX_SECTORS_LBA48
;
2416 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2418 if (ata_dev_knobble(dev
)) {
2419 if (ata_msg_drv(ap
) && print_info
)
2420 ata_dev_info(dev
, "applying bridge limits\n");
2421 dev
->udma_mask
&= ATA_UDMA5
;
2422 dev
->max_sectors
= ATA_MAX_SECTORS
;
2425 if ((dev
->class == ATA_DEV_ATAPI
) &&
2426 (atapi_command_packet_set(id
) == TYPE_TAPE
)) {
2427 dev
->max_sectors
= ATA_MAX_SECTORS_TAPE
;
2428 dev
->horkage
|= ATA_HORKAGE_STUCK_ERR
;
2431 if (dev
->horkage
& ATA_HORKAGE_MAX_SEC_128
)
2432 dev
->max_sectors
= min_t(unsigned int, ATA_MAX_SECTORS_128
,
2435 if (ap
->ops
->dev_config
)
2436 ap
->ops
->dev_config(dev
);
2438 if (dev
->horkage
& ATA_HORKAGE_DIAGNOSTIC
) {
2439 /* Let the user know. We don't want to disallow opens for
2440 rescue purposes, or in case the vendor is just a blithering
2441 idiot. Do this after the dev_config call as some controllers
2442 with buggy firmware may want to avoid reporting false device
2447 "Drive reports diagnostics failure. This may indicate a drive\n");
2449 "fault or invalid emulation. Contact drive vendor for information.\n");
2453 if ((dev
->horkage
& ATA_HORKAGE_FIRMWARE_WARN
) && print_info
) {
2454 ata_dev_warn(dev
, "WARNING: device requires firmware update to be fully functional\n");
2455 ata_dev_warn(dev
, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2461 if (ata_msg_probe(ap
))
2462 ata_dev_dbg(dev
, "%s: EXIT, err\n", __func__
);
2467 * ata_cable_40wire - return 40 wire cable type
2470 * Helper method for drivers which want to hardwire 40 wire cable
2474 int ata_cable_40wire(struct ata_port
*ap
)
2476 return ATA_CBL_PATA40
;
2480 * ata_cable_80wire - return 80 wire cable type
2483 * Helper method for drivers which want to hardwire 80 wire cable
2487 int ata_cable_80wire(struct ata_port
*ap
)
2489 return ATA_CBL_PATA80
;
2493 * ata_cable_unknown - return unknown PATA cable.
2496 * Helper method for drivers which have no PATA cable detection.
2499 int ata_cable_unknown(struct ata_port
*ap
)
2501 return ATA_CBL_PATA_UNK
;
2505 * ata_cable_ignore - return ignored PATA cable.
2508 * Helper method for drivers which don't use cable type to limit
2511 int ata_cable_ignore(struct ata_port
*ap
)
2513 return ATA_CBL_PATA_IGN
;
2517 * ata_cable_sata - return SATA cable type
2520 * Helper method for drivers which have SATA cables
2523 int ata_cable_sata(struct ata_port
*ap
)
2525 return ATA_CBL_SATA
;
2529 * ata_bus_probe - Reset and probe ATA bus
2532 * Master ATA bus probing function. Initiates a hardware-dependent
2533 * bus reset, then attempts to identify any devices found on
2537 * PCI/etc. bus probe sem.
2540 * Zero on success, negative errno otherwise.
2543 int ata_bus_probe(struct ata_port
*ap
)
2545 unsigned int classes
[ATA_MAX_DEVICES
];
2546 int tries
[ATA_MAX_DEVICES
];
2548 struct ata_device
*dev
;
2550 ata_for_each_dev(dev
, &ap
->link
, ALL
)
2551 tries
[dev
->devno
] = ATA_PROBE_MAX_TRIES
;
2554 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2555 /* If we issue an SRST then an ATA drive (not ATAPI)
2556 * may change configuration and be in PIO0 timing. If
2557 * we do a hard reset (or are coming from power on)
2558 * this is true for ATA or ATAPI. Until we've set a
2559 * suitable controller mode we should not touch the
2560 * bus as we may be talking too fast.
2562 dev
->pio_mode
= XFER_PIO_0
;
2564 /* If the controller has a pio mode setup function
2565 * then use it to set the chipset to rights. Don't
2566 * touch the DMA setup as that will be dealt with when
2567 * configuring devices.
2569 if (ap
->ops
->set_piomode
)
2570 ap
->ops
->set_piomode(ap
, dev
);
2573 /* reset and determine device classes */
2574 ap
->ops
->phy_reset(ap
);
2576 ata_for_each_dev(dev
, &ap
->link
, ALL
) {
2577 if (dev
->class != ATA_DEV_UNKNOWN
)
2578 classes
[dev
->devno
] = dev
->class;
2580 classes
[dev
->devno
] = ATA_DEV_NONE
;
2582 dev
->class = ATA_DEV_UNKNOWN
;
2585 /* read IDENTIFY page and configure devices. We have to do the identify
2586 specific sequence bass-ackwards so that PDIAG- is released by
2589 ata_for_each_dev(dev
, &ap
->link
, ALL_REVERSE
) {
2590 if (tries
[dev
->devno
])
2591 dev
->class = classes
[dev
->devno
];
2593 if (!ata_dev_enabled(dev
))
2596 rc
= ata_dev_read_id(dev
, &dev
->class, ATA_READID_POSTRESET
,
2602 /* Now ask for the cable type as PDIAG- should have been released */
2603 if (ap
->ops
->cable_detect
)
2604 ap
->cbl
= ap
->ops
->cable_detect(ap
);
2606 /* We may have SATA bridge glue hiding here irrespective of
2607 * the reported cable types and sensed types. When SATA
2608 * drives indicate we have a bridge, we don't know which end
2609 * of the link the bridge is which is a problem.
2611 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2612 if (ata_id_is_sata(dev
->id
))
2613 ap
->cbl
= ATA_CBL_SATA
;
2615 /* After the identify sequence we can now set up the devices. We do
2616 this in the normal order so that the user doesn't get confused */
2618 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
2619 ap
->link
.eh_context
.i
.flags
|= ATA_EHI_PRINTINFO
;
2620 rc
= ata_dev_configure(dev
);
2621 ap
->link
.eh_context
.i
.flags
&= ~ATA_EHI_PRINTINFO
;
2626 /* configure transfer mode */
2627 rc
= ata_set_mode(&ap
->link
, &dev
);
2631 ata_for_each_dev(dev
, &ap
->link
, ENABLED
)
2637 tries
[dev
->devno
]--;
2641 /* eeek, something went very wrong, give up */
2642 tries
[dev
->devno
] = 0;
2646 /* give it just one more chance */
2647 tries
[dev
->devno
] = min(tries
[dev
->devno
], 1);
2649 if (tries
[dev
->devno
] == 1) {
2650 /* This is the last chance, better to slow
2651 * down than lose it.
2653 sata_down_spd_limit(&ap
->link
, 0);
2654 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
2658 if (!tries
[dev
->devno
])
2659 ata_dev_disable(dev
);
2665 * sata_print_link_status - Print SATA link status
2666 * @link: SATA link to printk link status about
2668 * This function prints link speed and status of a SATA link.
2673 static void sata_print_link_status(struct ata_link
*link
)
2675 u32 sstatus
, scontrol
, tmp
;
2677 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2679 sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
2681 if (ata_phys_link_online(link
)) {
2682 tmp
= (sstatus
>> 4) & 0xf;
2683 ata_link_info(link
, "SATA link up %s (SStatus %X SControl %X)\n",
2684 sata_spd_string(tmp
), sstatus
, scontrol
);
2686 ata_link_info(link
, "SATA link down (SStatus %X SControl %X)\n",
2692 * ata_dev_pair - return other device on cable
2695 * Obtain the other device on the same cable, or if none is
2696 * present NULL is returned
2699 struct ata_device
*ata_dev_pair(struct ata_device
*adev
)
2701 struct ata_link
*link
= adev
->link
;
2702 struct ata_device
*pair
= &link
->device
[1 - adev
->devno
];
2703 if (!ata_dev_enabled(pair
))
2709 * sata_down_spd_limit - adjust SATA spd limit downward
2710 * @link: Link to adjust SATA spd limit for
2711 * @spd_limit: Additional limit
2713 * Adjust SATA spd limit of @link downward. Note that this
2714 * function only adjusts the limit. The change must be applied
2715 * using sata_set_spd().
2717 * If @spd_limit is non-zero, the speed is limited to equal to or
2718 * lower than @spd_limit if such speed is supported. If
2719 * @spd_limit is slower than any supported speed, only the lowest
2720 * supported speed is allowed.
2723 * Inherited from caller.
2726 * 0 on success, negative errno on failure
2728 int sata_down_spd_limit(struct ata_link
*link
, u32 spd_limit
)
2730 u32 sstatus
, spd
, mask
;
2733 if (!sata_scr_valid(link
))
2736 /* If SCR can be read, use it to determine the current SPD.
2737 * If not, use cached value in link->sata_spd.
2739 rc
= sata_scr_read(link
, SCR_STATUS
, &sstatus
);
2740 if (rc
== 0 && ata_sstatus_online(sstatus
))
2741 spd
= (sstatus
>> 4) & 0xf;
2743 spd
= link
->sata_spd
;
2745 mask
= link
->sata_spd_limit
;
2749 /* unconditionally mask off the highest bit */
2750 bit
= fls(mask
) - 1;
2751 mask
&= ~(1 << bit
);
2753 /* Mask off all speeds higher than or equal to the current
2754 * one. Force 1.5Gbps if current SPD is not available.
2757 mask
&= (1 << (spd
- 1)) - 1;
2761 /* were we already at the bottom? */
2766 if (mask
& ((1 << spd_limit
) - 1))
2767 mask
&= (1 << spd_limit
) - 1;
2769 bit
= ffs(mask
) - 1;
2774 link
->sata_spd_limit
= mask
;
2776 ata_link_warn(link
, "limiting SATA link speed to %s\n",
2777 sata_spd_string(fls(mask
)));
2782 static int __sata_set_spd_needed(struct ata_link
*link
, u32
*scontrol
)
2784 struct ata_link
*host_link
= &link
->ap
->link
;
2785 u32 limit
, target
, spd
;
2787 limit
= link
->sata_spd_limit
;
2789 /* Don't configure downstream link faster than upstream link.
2790 * It doesn't speed up anything and some PMPs choke on such
2793 if (!ata_is_host_link(link
) && host_link
->sata_spd
)
2794 limit
&= (1 << host_link
->sata_spd
) - 1;
2796 if (limit
== UINT_MAX
)
2799 target
= fls(limit
);
2801 spd
= (*scontrol
>> 4) & 0xf;
2802 *scontrol
= (*scontrol
& ~0xf0) | ((target
& 0xf) << 4);
2804 return spd
!= target
;
2808 * sata_set_spd_needed - is SATA spd configuration needed
2809 * @link: Link in question
2811 * Test whether the spd limit in SControl matches
2812 * @link->sata_spd_limit. This function is used to determine
2813 * whether hardreset is necessary to apply SATA spd
2817 * Inherited from caller.
2820 * 1 if SATA spd configuration is needed, 0 otherwise.
2822 static int sata_set_spd_needed(struct ata_link
*link
)
2826 if (sata_scr_read(link
, SCR_CONTROL
, &scontrol
))
2829 return __sata_set_spd_needed(link
, &scontrol
);
2833 * sata_set_spd - set SATA spd according to spd limit
2834 * @link: Link to set SATA spd for
2836 * Set SATA spd of @link according to sata_spd_limit.
2839 * Inherited from caller.
2842 * 0 if spd doesn't need to be changed, 1 if spd has been
2843 * changed. Negative errno if SCR registers are inaccessible.
2845 int sata_set_spd(struct ata_link
*link
)
2850 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
2853 if (!__sata_set_spd_needed(link
, &scontrol
))
2856 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
2863 * This mode timing computation functionality is ported over from
2864 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2867 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2868 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2869 * for UDMA6, which is currently supported only by Maxtor drives.
2871 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2874 static const struct ata_timing ata_timing
[] = {
2875 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2876 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2877 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2878 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2879 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2880 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2881 { XFER_PIO_5
, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2882 { XFER_PIO_6
, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2884 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2885 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2886 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2888 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2889 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2890 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2891 { XFER_MW_DMA_3
, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2892 { XFER_MW_DMA_4
, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2894 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2895 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2896 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2897 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2898 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2899 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2900 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2901 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2906 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2907 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2909 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
2911 q
->setup
= EZ(t
->setup
* 1000, T
);
2912 q
->act8b
= EZ(t
->act8b
* 1000, T
);
2913 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
2914 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
2915 q
->active
= EZ(t
->active
* 1000, T
);
2916 q
->recover
= EZ(t
->recover
* 1000, T
);
2917 q
->dmack_hold
= EZ(t
->dmack_hold
* 1000, T
);
2918 q
->cycle
= EZ(t
->cycle
* 1000, T
);
2919 q
->udma
= EZ(t
->udma
* 1000, UT
);
2922 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
2923 struct ata_timing
*m
, unsigned int what
)
2925 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
2926 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
2927 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
2928 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
2929 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
2930 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
2931 if (what
& ATA_TIMING_DMACK_HOLD
) m
->dmack_hold
= max(a
->dmack_hold
, b
->dmack_hold
);
2932 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
2933 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
2936 const struct ata_timing
*ata_timing_find_mode(u8 xfer_mode
)
2938 const struct ata_timing
*t
= ata_timing
;
2940 while (xfer_mode
> t
->mode
)
2943 if (xfer_mode
== t
->mode
)
2946 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
2947 __func__
, xfer_mode
);
2952 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
2953 struct ata_timing
*t
, int T
, int UT
)
2955 const u16
*id
= adev
->id
;
2956 const struct ata_timing
*s
;
2957 struct ata_timing p
;
2963 if (!(s
= ata_timing_find_mode(speed
)))
2966 memcpy(t
, s
, sizeof(*s
));
2969 * If the drive is an EIDE drive, it can tell us it needs extended
2970 * PIO/MW_DMA cycle timing.
2973 if (id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
2974 memset(&p
, 0, sizeof(p
));
2976 if (speed
>= XFER_PIO_0
&& speed
< XFER_SW_DMA_0
) {
2977 if (speed
<= XFER_PIO_2
)
2978 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO
];
2979 else if ((speed
<= XFER_PIO_4
) ||
2980 (speed
== XFER_PIO_5
&& !ata_id_is_cfa(id
)))
2981 p
.cycle
= p
.cyc8b
= id
[ATA_ID_EIDE_PIO_IORDY
];
2982 } else if (speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
)
2983 p
.cycle
= id
[ATA_ID_EIDE_DMA_MIN
];
2985 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
2989 * Convert the timing to bus clock counts.
2992 ata_timing_quantize(t
, t
, T
, UT
);
2995 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2996 * S.M.A.R.T * and some other commands. We have to ensure that the
2997 * DMA cycle timing is slower/equal than the fastest PIO timing.
3000 if (speed
> XFER_PIO_6
) {
3001 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
3002 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
3006 * Lengthen active & recovery time so that cycle time is correct.
3009 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
3010 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
3011 t
->rec8b
= t
->cyc8b
- t
->act8b
;
3014 if (t
->active
+ t
->recover
< t
->cycle
) {
3015 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
3016 t
->recover
= t
->cycle
- t
->active
;
3019 /* In a few cases quantisation may produce enough errors to
3020 leave t->cycle too low for the sum of active and recovery
3021 if so we must correct this */
3022 if (t
->active
+ t
->recover
> t
->cycle
)
3023 t
->cycle
= t
->active
+ t
->recover
;
3029 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3030 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3031 * @cycle: cycle duration in ns
3033 * Return matching xfer mode for @cycle. The returned mode is of
3034 * the transfer type specified by @xfer_shift. If @cycle is too
3035 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3036 * than the fastest known mode, the fasted mode is returned.
3042 * Matching xfer_mode, 0xff if no match found.
3044 u8
ata_timing_cycle2mode(unsigned int xfer_shift
, int cycle
)
3046 u8 base_mode
= 0xff, last_mode
= 0xff;
3047 const struct ata_xfer_ent
*ent
;
3048 const struct ata_timing
*t
;
3050 for (ent
= ata_xfer_tbl
; ent
->shift
>= 0; ent
++)
3051 if (ent
->shift
== xfer_shift
)
3052 base_mode
= ent
->base
;
3054 for (t
= ata_timing_find_mode(base_mode
);
3055 t
&& ata_xfer_mode2shift(t
->mode
) == xfer_shift
; t
++) {
3056 unsigned short this_cycle
;
3058 switch (xfer_shift
) {
3060 case ATA_SHIFT_MWDMA
:
3061 this_cycle
= t
->cycle
;
3063 case ATA_SHIFT_UDMA
:
3064 this_cycle
= t
->udma
;
3070 if (cycle
> this_cycle
)
3073 last_mode
= t
->mode
;
3080 * ata_down_xfermask_limit - adjust dev xfer masks downward
3081 * @dev: Device to adjust xfer masks
3082 * @sel: ATA_DNXFER_* selector
3084 * Adjust xfer masks of @dev downward. Note that this function
3085 * does not apply the change. Invoking ata_set_mode() afterwards
3086 * will apply the limit.
3089 * Inherited from caller.
3092 * 0 on success, negative errno on failure
3094 int ata_down_xfermask_limit(struct ata_device
*dev
, unsigned int sel
)
3097 unsigned long orig_mask
, xfer_mask
;
3098 unsigned long pio_mask
, mwdma_mask
, udma_mask
;
3101 quiet
= !!(sel
& ATA_DNXFER_QUIET
);
3102 sel
&= ~ATA_DNXFER_QUIET
;
3104 xfer_mask
= orig_mask
= ata_pack_xfermask(dev
->pio_mask
,
3107 ata_unpack_xfermask(xfer_mask
, &pio_mask
, &mwdma_mask
, &udma_mask
);
3110 case ATA_DNXFER_PIO
:
3111 highbit
= fls(pio_mask
) - 1;
3112 pio_mask
&= ~(1 << highbit
);
3115 case ATA_DNXFER_DMA
:
3117 highbit
= fls(udma_mask
) - 1;
3118 udma_mask
&= ~(1 << highbit
);
3121 } else if (mwdma_mask
) {
3122 highbit
= fls(mwdma_mask
) - 1;
3123 mwdma_mask
&= ~(1 << highbit
);
3129 case ATA_DNXFER_40C
:
3130 udma_mask
&= ATA_UDMA_MASK_40C
;
3133 case ATA_DNXFER_FORCE_PIO0
:
3135 case ATA_DNXFER_FORCE_PIO
:
3144 xfer_mask
&= ata_pack_xfermask(pio_mask
, mwdma_mask
, udma_mask
);
3146 if (!(xfer_mask
& ATA_MASK_PIO
) || xfer_mask
== orig_mask
)
3150 if (xfer_mask
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
))
3151 snprintf(buf
, sizeof(buf
), "%s:%s",
3152 ata_mode_string(xfer_mask
),
3153 ata_mode_string(xfer_mask
& ATA_MASK_PIO
));
3155 snprintf(buf
, sizeof(buf
), "%s",
3156 ata_mode_string(xfer_mask
));
3158 ata_dev_warn(dev
, "limiting speed to %s\n", buf
);
3161 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
, &dev
->mwdma_mask
,
3167 static int ata_dev_set_mode(struct ata_device
*dev
)
3169 struct ata_port
*ap
= dev
->link
->ap
;
3170 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3171 const bool nosetxfer
= dev
->horkage
& ATA_HORKAGE_NOSETXFER
;
3172 const char *dev_err_whine
= "";
3173 int ign_dev_err
= 0;
3174 unsigned int err_mask
= 0;
3177 dev
->flags
&= ~ATA_DFLAG_PIO
;
3178 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
3179 dev
->flags
|= ATA_DFLAG_PIO
;
3181 if (nosetxfer
&& ap
->flags
& ATA_FLAG_SATA
&& ata_id_is_sata(dev
->id
))
3182 dev_err_whine
= " (SET_XFERMODE skipped)";
3186 "NOSETXFER but PATA detected - can't "
3187 "skip SETXFER, might malfunction\n");
3188 err_mask
= ata_dev_set_xfermode(dev
);
3191 if (err_mask
& ~AC_ERR_DEV
)
3195 ehc
->i
.flags
|= ATA_EHI_POST_SETMODE
;
3196 rc
= ata_dev_revalidate(dev
, ATA_DEV_UNKNOWN
, 0);
3197 ehc
->i
.flags
&= ~ATA_EHI_POST_SETMODE
;
3201 if (dev
->xfer_shift
== ATA_SHIFT_PIO
) {
3202 /* Old CFA may refuse this command, which is just fine */
3203 if (ata_id_is_cfa(dev
->id
))
3205 /* Catch several broken garbage emulations plus some pre
3207 if (ata_id_major_version(dev
->id
) == 0 &&
3208 dev
->pio_mode
<= XFER_PIO_2
)
3210 /* Some very old devices and some bad newer ones fail
3211 any kind of SET_XFERMODE request but support PIO0-2
3212 timings and no IORDY */
3213 if (!ata_id_has_iordy(dev
->id
) && dev
->pio_mode
<= XFER_PIO_2
)
3216 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3217 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3218 if (dev
->xfer_shift
== ATA_SHIFT_MWDMA
&&
3219 dev
->dma_mode
== XFER_MW_DMA_0
&&
3220 (dev
->id
[63] >> 8) & 1)
3223 /* if the device is actually configured correctly, ignore dev err */
3224 if (dev
->xfer_mode
== ata_xfer_mask2mode(ata_id_xfermask(dev
->id
)))
3227 if (err_mask
& AC_ERR_DEV
) {
3231 dev_err_whine
= " (device error ignored)";
3234 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3235 dev
->xfer_shift
, (int)dev
->xfer_mode
);
3237 ata_dev_info(dev
, "configured for %s%s\n",
3238 ata_mode_string(ata_xfer_mode2mask(dev
->xfer_mode
)),
3244 ata_dev_err(dev
, "failed to set xfermode (err_mask=0x%x)\n", err_mask
);
3249 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3250 * @link: link on which timings will be programmed
3251 * @r_failed_dev: out parameter for failed device
3253 * Standard implementation of the function used to tune and set
3254 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3255 * ata_dev_set_mode() fails, pointer to the failing device is
3256 * returned in @r_failed_dev.
3259 * PCI/etc. bus probe sem.
3262 * 0 on success, negative errno otherwise
3265 int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3267 struct ata_port
*ap
= link
->ap
;
3268 struct ata_device
*dev
;
3269 int rc
= 0, used_dma
= 0, found
= 0;
3271 /* step 1: calculate xfer_mask */
3272 ata_for_each_dev(dev
, link
, ENABLED
) {
3273 unsigned long pio_mask
, dma_mask
;
3274 unsigned int mode_mask
;
3276 mode_mask
= ATA_DMA_MASK_ATA
;
3277 if (dev
->class == ATA_DEV_ATAPI
)
3278 mode_mask
= ATA_DMA_MASK_ATAPI
;
3279 else if (ata_id_is_cfa(dev
->id
))
3280 mode_mask
= ATA_DMA_MASK_CFA
;
3282 ata_dev_xfermask(dev
);
3283 ata_force_xfermask(dev
);
3285 pio_mask
= ata_pack_xfermask(dev
->pio_mask
, 0, 0);
3287 if (libata_dma_mask
& mode_mask
)
3288 dma_mask
= ata_pack_xfermask(0, dev
->mwdma_mask
,
3293 dev
->pio_mode
= ata_xfer_mask2mode(pio_mask
);
3294 dev
->dma_mode
= ata_xfer_mask2mode(dma_mask
);
3297 if (ata_dma_enabled(dev
))
3303 /* step 2: always set host PIO timings */
3304 ata_for_each_dev(dev
, link
, ENABLED
) {
3305 if (dev
->pio_mode
== 0xff) {
3306 ata_dev_warn(dev
, "no PIO support\n");
3311 dev
->xfer_mode
= dev
->pio_mode
;
3312 dev
->xfer_shift
= ATA_SHIFT_PIO
;
3313 if (ap
->ops
->set_piomode
)
3314 ap
->ops
->set_piomode(ap
, dev
);
3317 /* step 3: set host DMA timings */
3318 ata_for_each_dev(dev
, link
, ENABLED
) {
3319 if (!ata_dma_enabled(dev
))
3322 dev
->xfer_mode
= dev
->dma_mode
;
3323 dev
->xfer_shift
= ata_xfer_mode2shift(dev
->dma_mode
);
3324 if (ap
->ops
->set_dmamode
)
3325 ap
->ops
->set_dmamode(ap
, dev
);
3328 /* step 4: update devices' xfer mode */
3329 ata_for_each_dev(dev
, link
, ENABLED
) {
3330 rc
= ata_dev_set_mode(dev
);
3335 /* Record simplex status. If we selected DMA then the other
3336 * host channels are not permitted to do so.
3338 if (used_dma
&& (ap
->host
->flags
& ATA_HOST_SIMPLEX
))
3339 ap
->host
->simplex_claimed
= ap
;
3343 *r_failed_dev
= dev
;
3348 * ata_wait_ready - wait for link to become ready
3349 * @link: link to be waited on
3350 * @deadline: deadline jiffies for the operation
3351 * @check_ready: callback to check link readiness
3353 * Wait for @link to become ready. @check_ready should return
3354 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3355 * link doesn't seem to be occupied, other errno for other error
3358 * Transient -ENODEV conditions are allowed for
3359 * ATA_TMOUT_FF_WAIT.
3365 * 0 if @linke is ready before @deadline; otherwise, -errno.
3367 int ata_wait_ready(struct ata_link
*link
, unsigned long deadline
,
3368 int (*check_ready
)(struct ata_link
*link
))
3370 unsigned long start
= jiffies
;
3371 unsigned long nodev_deadline
;
3374 /* choose which 0xff timeout to use, read comment in libata.h */
3375 if (link
->ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
)
3376 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT_LONG
);
3378 nodev_deadline
= ata_deadline(start
, ATA_TMOUT_FF_WAIT
);
3380 /* Slave readiness can't be tested separately from master. On
3381 * M/S emulation configuration, this function should be called
3382 * only on the master and it will handle both master and slave.
3384 WARN_ON(link
== link
->ap
->slave_link
);
3386 if (time_after(nodev_deadline
, deadline
))
3387 nodev_deadline
= deadline
;
3390 unsigned long now
= jiffies
;
3393 ready
= tmp
= check_ready(link
);
3398 * -ENODEV could be transient. Ignore -ENODEV if link
3399 * is online. Also, some SATA devices take a long
3400 * time to clear 0xff after reset. Wait for
3401 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3404 * Note that some PATA controllers (pata_ali) explode
3405 * if status register is read more than once when
3406 * there's no device attached.
3408 if (ready
== -ENODEV
) {
3409 if (ata_link_online(link
))
3411 else if ((link
->ap
->flags
& ATA_FLAG_SATA
) &&
3412 !ata_link_offline(link
) &&
3413 time_before(now
, nodev_deadline
))
3419 if (time_after(now
, deadline
))
3422 if (!warned
&& time_after(now
, start
+ 5 * HZ
) &&
3423 (deadline
- now
> 3 * HZ
)) {
3425 "link is slow to respond, please be patient "
3426 "(ready=%d)\n", tmp
);
3430 ata_msleep(link
->ap
, 50);
3435 * ata_wait_after_reset - wait for link to become ready after reset
3436 * @link: link to be waited on
3437 * @deadline: deadline jiffies for the operation
3438 * @check_ready: callback to check link readiness
3440 * Wait for @link to become ready after reset.
3446 * 0 if @linke is ready before @deadline; otherwise, -errno.
3448 int ata_wait_after_reset(struct ata_link
*link
, unsigned long deadline
,
3449 int (*check_ready
)(struct ata_link
*link
))
3451 ata_msleep(link
->ap
, ATA_WAIT_AFTER_RESET
);
3453 return ata_wait_ready(link
, deadline
, check_ready
);
3457 * sata_link_debounce - debounce SATA phy status
3458 * @link: ATA link to debounce SATA phy status for
3459 * @params: timing parameters { interval, duratinon, timeout } in msec
3460 * @deadline: deadline jiffies for the operation
3462 * Make sure SStatus of @link reaches stable state, determined by
3463 * holding the same value where DET is not 1 for @duration polled
3464 * every @interval, before @timeout. Timeout constraints the
3465 * beginning of the stable state. Because DET gets stuck at 1 on
3466 * some controllers after hot unplugging, this functions waits
3467 * until timeout then returns 0 if DET is stable at 1.
3469 * @timeout is further limited by @deadline. The sooner of the
3473 * Kernel thread context (may sleep)
3476 * 0 on success, -errno on failure.
3478 int sata_link_debounce(struct ata_link
*link
, const unsigned long *params
,
3479 unsigned long deadline
)
3481 unsigned long interval
= params
[0];
3482 unsigned long duration
= params
[1];
3483 unsigned long last_jiffies
, t
;
3487 t
= ata_deadline(jiffies
, params
[2]);
3488 if (time_before(t
, deadline
))
3491 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3496 last_jiffies
= jiffies
;
3499 ata_msleep(link
->ap
, interval
);
3500 if ((rc
= sata_scr_read(link
, SCR_STATUS
, &cur
)))
3506 if (cur
== 1 && time_before(jiffies
, deadline
))
3508 if (time_after(jiffies
,
3509 ata_deadline(last_jiffies
, duration
)))
3514 /* unstable, start over */
3516 last_jiffies
= jiffies
;
3518 /* Check deadline. If debouncing failed, return
3519 * -EPIPE to tell upper layer to lower link speed.
3521 if (time_after(jiffies
, deadline
))
3527 * sata_link_resume - resume SATA link
3528 * @link: ATA link to resume SATA
3529 * @params: timing parameters { interval, duratinon, timeout } in msec
3530 * @deadline: deadline jiffies for the operation
3532 * Resume SATA phy @link and debounce it.
3535 * Kernel thread context (may sleep)
3538 * 0 on success, -errno on failure.
3540 int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
3541 unsigned long deadline
)
3543 int tries
= ATA_LINK_RESUME_TRIES
;
3544 u32 scontrol
, serror
;
3547 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3551 * Writes to SControl sometimes get ignored under certain
3552 * controllers (ata_piix SIDPR). Make sure DET actually is
3556 scontrol
= (scontrol
& 0x0f0) | 0x300;
3557 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3560 * Some PHYs react badly if SStatus is pounded
3561 * immediately after resuming. Delay 200ms before
3564 ata_msleep(link
->ap
, 200);
3566 /* is SControl restored correctly? */
3567 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3569 } while ((scontrol
& 0xf0f) != 0x300 && --tries
);
3571 if ((scontrol
& 0xf0f) != 0x300) {
3572 ata_link_warn(link
, "failed to resume link (SControl %X)\n",
3577 if (tries
< ATA_LINK_RESUME_TRIES
)
3578 ata_link_warn(link
, "link resume succeeded after %d retries\n",
3579 ATA_LINK_RESUME_TRIES
- tries
);
3581 if ((rc
= sata_link_debounce(link
, params
, deadline
)))
3584 /* clear SError, some PHYs require this even for SRST to work */
3585 if (!(rc
= sata_scr_read(link
, SCR_ERROR
, &serror
)))
3586 rc
= sata_scr_write(link
, SCR_ERROR
, serror
);
3588 return rc
!= -EINVAL
? rc
: 0;
3592 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3593 * @link: ATA link to manipulate SControl for
3594 * @policy: LPM policy to configure
3595 * @spm_wakeup: initiate LPM transition to active state
3597 * Manipulate the IPM field of the SControl register of @link
3598 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3599 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3600 * the link. This function also clears PHYRDY_CHG before
3607 * 0 on succes, -errno otherwise.
3609 int sata_link_scr_lpm(struct ata_link
*link
, enum ata_lpm_policy policy
,
3612 struct ata_eh_context
*ehc
= &link
->eh_context
;
3613 bool woken_up
= false;
3617 rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
);
3622 case ATA_LPM_MAX_POWER
:
3623 /* disable all LPM transitions */
3624 scontrol
|= (0x7 << 8);
3625 /* initiate transition to active state */
3627 scontrol
|= (0x4 << 12);
3631 case ATA_LPM_MED_POWER
:
3632 /* allow LPM to PARTIAL */
3633 scontrol
&= ~(0x1 << 8);
3634 scontrol
|= (0x6 << 8);
3636 case ATA_LPM_MIN_POWER
:
3637 if (ata_link_nr_enabled(link
) > 0)
3638 /* no restrictions on LPM transitions */
3639 scontrol
&= ~(0x7 << 8);
3641 /* empty port, power off */
3643 scontrol
|= (0x1 << 2);
3650 rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
);
3654 /* give the link time to transit out of LPM state */
3658 /* clear PHYRDY_CHG from SError */
3659 ehc
->i
.serror
&= ~SERR_PHYRDY_CHG
;
3660 return sata_scr_write(link
, SCR_ERROR
, SERR_PHYRDY_CHG
);
3664 * ata_std_prereset - prepare for reset
3665 * @link: ATA link to be reset
3666 * @deadline: deadline jiffies for the operation
3668 * @link is about to be reset. Initialize it. Failure from
3669 * prereset makes libata abort whole reset sequence and give up
3670 * that port, so prereset should be best-effort. It does its
3671 * best to prepare for reset sequence but if things go wrong, it
3672 * should just whine, not fail.
3675 * Kernel thread context (may sleep)
3678 * 0 on success, -errno otherwise.
3680 int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
)
3682 struct ata_port
*ap
= link
->ap
;
3683 struct ata_eh_context
*ehc
= &link
->eh_context
;
3684 const unsigned long *timing
= sata_ehc_deb_timing(ehc
);
3687 /* if we're about to do hardreset, nothing more to do */
3688 if (ehc
->i
.action
& ATA_EH_HARDRESET
)
3691 /* if SATA, resume link */
3692 if (ap
->flags
& ATA_FLAG_SATA
) {
3693 rc
= sata_link_resume(link
, timing
, deadline
);
3694 /* whine about phy resume failure but proceed */
3695 if (rc
&& rc
!= -EOPNOTSUPP
)
3697 "failed to resume link for reset (errno=%d)\n",
3701 /* no point in trying softreset on offline link */
3702 if (ata_phys_link_offline(link
))
3703 ehc
->i
.action
&= ~ATA_EH_SOFTRESET
;
3709 * sata_link_hardreset - reset link via SATA phy reset
3710 * @link: link to reset
3711 * @timing: timing parameters { interval, duratinon, timeout } in msec
3712 * @deadline: deadline jiffies for the operation
3713 * @online: optional out parameter indicating link onlineness
3714 * @check_ready: optional callback to check link readiness
3716 * SATA phy-reset @link using DET bits of SControl register.
3717 * After hardreset, link readiness is waited upon using
3718 * ata_wait_ready() if @check_ready is specified. LLDs are
3719 * allowed to not specify @check_ready and wait itself after this
3720 * function returns. Device classification is LLD's
3723 * *@online is set to one iff reset succeeded and @link is online
3727 * Kernel thread context (may sleep)
3730 * 0 on success, -errno otherwise.
3732 int sata_link_hardreset(struct ata_link
*link
, const unsigned long *timing
,
3733 unsigned long deadline
,
3734 bool *online
, int (*check_ready
)(struct ata_link
*))
3744 if (sata_set_spd_needed(link
)) {
3745 /* SATA spec says nothing about how to reconfigure
3746 * spd. To be on the safe side, turn off phy during
3747 * reconfiguration. This works for at least ICH7 AHCI
3750 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3753 scontrol
= (scontrol
& 0x0f0) | 0x304;
3755 if ((rc
= sata_scr_write(link
, SCR_CONTROL
, scontrol
)))
3761 /* issue phy wake/reset */
3762 if ((rc
= sata_scr_read(link
, SCR_CONTROL
, &scontrol
)))
3765 scontrol
= (scontrol
& 0x0f0) | 0x301;
3767 if ((rc
= sata_scr_write_flush(link
, SCR_CONTROL
, scontrol
)))
3770 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3771 * 10.4.2 says at least 1 ms.
3773 ata_msleep(link
->ap
, 1);
3775 /* bring link back */
3776 rc
= sata_link_resume(link
, timing
, deadline
);
3779 /* if link is offline nothing more to do */
3780 if (ata_phys_link_offline(link
))
3783 /* Link is online. From this point, -ENODEV too is an error. */
3787 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
)) {
3788 /* If PMP is supported, we have to do follow-up SRST.
3789 * Some PMPs don't send D2H Reg FIS after hardreset if
3790 * the first port is empty. Wait only for
3791 * ATA_TMOUT_PMP_SRST_WAIT.
3794 unsigned long pmp_deadline
;
3796 pmp_deadline
= ata_deadline(jiffies
,
3797 ATA_TMOUT_PMP_SRST_WAIT
);
3798 if (time_after(pmp_deadline
, deadline
))
3799 pmp_deadline
= deadline
;
3800 ata_wait_ready(link
, pmp_deadline
, check_ready
);
3808 rc
= ata_wait_ready(link
, deadline
, check_ready
);
3810 if (rc
&& rc
!= -EAGAIN
) {
3811 /* online is set iff link is online && reset succeeded */
3814 ata_link_err(link
, "COMRESET failed (errno=%d)\n", rc
);
3816 DPRINTK("EXIT, rc=%d\n", rc
);
3821 * sata_std_hardreset - COMRESET w/o waiting or classification
3822 * @link: link to reset
3823 * @class: resulting class of attached device
3824 * @deadline: deadline jiffies for the operation
3826 * Standard SATA COMRESET w/o waiting or classification.
3829 * Kernel thread context (may sleep)
3832 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3834 int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
3835 unsigned long deadline
)
3837 const unsigned long *timing
= sata_ehc_deb_timing(&link
->eh_context
);
3842 rc
= sata_link_hardreset(link
, timing
, deadline
, &online
, NULL
);
3843 return online
? -EAGAIN
: rc
;
3847 * ata_std_postreset - standard postreset callback
3848 * @link: the target ata_link
3849 * @classes: classes of attached devices
3851 * This function is invoked after a successful reset. Note that
3852 * the device might have been reset more than once using
3853 * different reset methods before postreset is invoked.
3856 * Kernel thread context (may sleep)
3858 void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
)
3864 /* reset complete, clear SError */
3865 if (!sata_scr_read(link
, SCR_ERROR
, &serror
))
3866 sata_scr_write(link
, SCR_ERROR
, serror
);
3868 /* print link status */
3869 sata_print_link_status(link
);
3875 * ata_dev_same_device - Determine whether new ID matches configured device
3876 * @dev: device to compare against
3877 * @new_class: class of the new device
3878 * @new_id: IDENTIFY page of the new device
3880 * Compare @new_class and @new_id against @dev and determine
3881 * whether @dev is the device indicated by @new_class and
3888 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3890 static int ata_dev_same_device(struct ata_device
*dev
, unsigned int new_class
,
3893 const u16
*old_id
= dev
->id
;
3894 unsigned char model
[2][ATA_ID_PROD_LEN
+ 1];
3895 unsigned char serial
[2][ATA_ID_SERNO_LEN
+ 1];
3897 if (dev
->class != new_class
) {
3898 ata_dev_info(dev
, "class mismatch %d != %d\n",
3899 dev
->class, new_class
);
3903 ata_id_c_string(old_id
, model
[0], ATA_ID_PROD
, sizeof(model
[0]));
3904 ata_id_c_string(new_id
, model
[1], ATA_ID_PROD
, sizeof(model
[1]));
3905 ata_id_c_string(old_id
, serial
[0], ATA_ID_SERNO
, sizeof(serial
[0]));
3906 ata_id_c_string(new_id
, serial
[1], ATA_ID_SERNO
, sizeof(serial
[1]));
3908 if (strcmp(model
[0], model
[1])) {
3909 ata_dev_info(dev
, "model number mismatch '%s' != '%s'\n",
3910 model
[0], model
[1]);
3914 if (strcmp(serial
[0], serial
[1])) {
3915 ata_dev_info(dev
, "serial number mismatch '%s' != '%s'\n",
3916 serial
[0], serial
[1]);
3924 * ata_dev_reread_id - Re-read IDENTIFY data
3925 * @dev: target ATA device
3926 * @readid_flags: read ID flags
3928 * Re-read IDENTIFY page and make sure @dev is still attached to
3932 * Kernel thread context (may sleep)
3935 * 0 on success, negative errno otherwise
3937 int ata_dev_reread_id(struct ata_device
*dev
, unsigned int readid_flags
)
3939 unsigned int class = dev
->class;
3940 u16
*id
= (void *)dev
->link
->ap
->sector_buf
;
3944 rc
= ata_dev_read_id(dev
, &class, readid_flags
, id
);
3948 /* is the device still there? */
3949 if (!ata_dev_same_device(dev
, class, id
))
3952 memcpy(dev
->id
, id
, sizeof(id
[0]) * ATA_ID_WORDS
);
3957 * ata_dev_revalidate - Revalidate ATA device
3958 * @dev: device to revalidate
3959 * @new_class: new class code
3960 * @readid_flags: read ID flags
3962 * Re-read IDENTIFY page, make sure @dev is still attached to the
3963 * port and reconfigure it according to the new IDENTIFY page.
3966 * Kernel thread context (may sleep)
3969 * 0 on success, negative errno otherwise
3971 int ata_dev_revalidate(struct ata_device
*dev
, unsigned int new_class
,
3972 unsigned int readid_flags
)
3974 u64 n_sectors
= dev
->n_sectors
;
3975 u64 n_native_sectors
= dev
->n_native_sectors
;
3978 if (!ata_dev_enabled(dev
))
3981 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3982 if (ata_class_enabled(new_class
) &&
3983 new_class
!= ATA_DEV_ATA
&&
3984 new_class
!= ATA_DEV_ATAPI
&&
3985 new_class
!= ATA_DEV_SEMB
) {
3986 ata_dev_info(dev
, "class mismatch %u != %u\n",
3987 dev
->class, new_class
);
3993 rc
= ata_dev_reread_id(dev
, readid_flags
);
3997 /* configure device according to the new ID */
3998 rc
= ata_dev_configure(dev
);
4002 /* verify n_sectors hasn't changed */
4003 if (dev
->class != ATA_DEV_ATA
|| !n_sectors
||
4004 dev
->n_sectors
== n_sectors
)
4007 /* n_sectors has changed */
4008 ata_dev_warn(dev
, "n_sectors mismatch %llu != %llu\n",
4009 (unsigned long long)n_sectors
,
4010 (unsigned long long)dev
->n_sectors
);
4013 * Something could have caused HPA to be unlocked
4014 * involuntarily. If n_native_sectors hasn't changed and the
4015 * new size matches it, keep the device.
4017 if (dev
->n_native_sectors
== n_native_sectors
&&
4018 dev
->n_sectors
> n_sectors
&& dev
->n_sectors
== n_native_sectors
) {
4020 "new n_sectors matches native, probably "
4021 "late HPA unlock, n_sectors updated\n");
4022 /* use the larger n_sectors */
4027 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4028 * unlocking HPA in those cases.
4030 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4032 if (dev
->n_native_sectors
== n_native_sectors
&&
4033 dev
->n_sectors
< n_sectors
&& n_sectors
== n_native_sectors
&&
4034 !(dev
->horkage
& ATA_HORKAGE_BROKEN_HPA
)) {
4036 "old n_sectors matches native, probably "
4037 "late HPA lock, will try to unlock HPA\n");
4038 /* try unlocking HPA */
4039 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
4044 /* restore original n_[native_]sectors and fail */
4045 dev
->n_native_sectors
= n_native_sectors
;
4046 dev
->n_sectors
= n_sectors
;
4048 ata_dev_err(dev
, "revalidation failed (errno=%d)\n", rc
);
4052 struct ata_blacklist_entry
{
4053 const char *model_num
;
4054 const char *model_rev
;
4055 unsigned long horkage
;
4058 static const struct ata_blacklist_entry ata_device_blacklist
[] = {
4059 /* Devices with DMA related problems under Linux */
4060 { "WDC AC11000H", NULL
, ATA_HORKAGE_NODMA
},
4061 { "WDC AC22100H", NULL
, ATA_HORKAGE_NODMA
},
4062 { "WDC AC32500H", NULL
, ATA_HORKAGE_NODMA
},
4063 { "WDC AC33100H", NULL
, ATA_HORKAGE_NODMA
},
4064 { "WDC AC31600H", NULL
, ATA_HORKAGE_NODMA
},
4065 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA
},
4066 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA
},
4067 { "Compaq CRD-8241B", NULL
, ATA_HORKAGE_NODMA
},
4068 { "CRD-8400B", NULL
, ATA_HORKAGE_NODMA
},
4069 { "CRD-848[02]B", NULL
, ATA_HORKAGE_NODMA
},
4070 { "CRD-84", NULL
, ATA_HORKAGE_NODMA
},
4071 { "SanDisk SDP3B", NULL
, ATA_HORKAGE_NODMA
},
4072 { "SanDisk SDP3B-64", NULL
, ATA_HORKAGE_NODMA
},
4073 { "SANYO CD-ROM CRD", NULL
, ATA_HORKAGE_NODMA
},
4074 { "HITACHI CDR-8", NULL
, ATA_HORKAGE_NODMA
},
4075 { "HITACHI CDR-8[34]35",NULL
, ATA_HORKAGE_NODMA
},
4076 { "Toshiba CD-ROM XM-6202B", NULL
, ATA_HORKAGE_NODMA
},
4077 { "TOSHIBA CD-ROM XM-1702BC", NULL
, ATA_HORKAGE_NODMA
},
4078 { "CD-532E-A", NULL
, ATA_HORKAGE_NODMA
},
4079 { "E-IDE CD-ROM CR-840",NULL
, ATA_HORKAGE_NODMA
},
4080 { "CD-ROM Drive/F5A", NULL
, ATA_HORKAGE_NODMA
},
4081 { "WPI CDD-820", NULL
, ATA_HORKAGE_NODMA
},
4082 { "SAMSUNG CD-ROM SC-148C", NULL
, ATA_HORKAGE_NODMA
},
4083 { "SAMSUNG CD-ROM SC", NULL
, ATA_HORKAGE_NODMA
},
4084 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL
,ATA_HORKAGE_NODMA
},
4085 { "_NEC DV5800A", NULL
, ATA_HORKAGE_NODMA
},
4086 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA
},
4087 { "Seagate STT20000A", NULL
, ATA_HORKAGE_NODMA
},
4088 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA
},
4089 /* Odd clown on sil3726/4726 PMPs */
4090 { "Config Disk", NULL
, ATA_HORKAGE_DISABLE
},
4092 /* Weird ATAPI devices */
4093 { "TORiSAN DVD-ROM DRD-N216", NULL
, ATA_HORKAGE_MAX_SEC_128
},
4094 { "QUANTUM DAT DAT72-000", NULL
, ATA_HORKAGE_ATAPI_MOD16_DMA
},
4096 /* Devices we expect to fail diagnostics */
4098 /* Devices where NCQ should be avoided */
4100 { "WDC WD740ADFD-00", NULL
, ATA_HORKAGE_NONCQ
},
4101 { "WDC WD740ADFD-00NLR1", NULL
, ATA_HORKAGE_NONCQ
, },
4102 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4103 { "FUJITSU MHT2060BH", NULL
, ATA_HORKAGE_NONCQ
},
4105 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ
},
4106 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ
},
4107 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ
},
4108 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ
},
4109 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ
},
4111 /* Seagate NCQ + FLUSH CACHE firmware bug */
4112 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4113 ATA_HORKAGE_FIRMWARE_WARN
},
4115 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4116 ATA_HORKAGE_FIRMWARE_WARN
},
4118 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4119 ATA_HORKAGE_FIRMWARE_WARN
},
4121 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ
|
4122 ATA_HORKAGE_FIRMWARE_WARN
},
4124 /* Blacklist entries taken from Silicon Image 3124/3132
4125 Windows driver .inf file - also several Linux problem reports */
4126 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ
, },
4127 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ
, },
4128 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ
, },
4130 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4131 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ
, },
4133 /* devices which puke on READ_NATIVE_MAX */
4134 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA
, },
4135 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA
},
4136 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA
},
4137 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA
},
4139 /* this one allows HPA unlocking but fails IOs on the area */
4140 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA
},
4142 /* Devices which report 1 sector over size HPA */
4143 { "ST340823A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4144 { "ST320413A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4145 { "ST310211A", NULL
, ATA_HORKAGE_HPA_SIZE
, },
4147 /* Devices which get the IVB wrong */
4148 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB
, },
4149 /* Maybe we should just blacklist TSSTcorp... */
4150 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB
, },
4152 /* Devices that do not need bridging limits applied */
4153 { "MTRON MSP-SATA*", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4154 { "BUFFALO HD-QSU2/R5", NULL
, ATA_HORKAGE_BRIDGE_OK
, },
4156 /* Devices which aren't very happy with higher link speeds */
4157 { "WD My Book", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4158 { "Seagate FreeAgent GoFlex", NULL
, ATA_HORKAGE_1_5_GBPS
, },
4161 * Devices which choke on SETXFER. Applies only if both the
4162 * device and controller are SATA.
4164 { "PIONEER DVD-RW DVRTD08", NULL
, ATA_HORKAGE_NOSETXFER
},
4165 { "PIONEER DVD-RW DVRTD08A", NULL
, ATA_HORKAGE_NOSETXFER
},
4166 { "PIONEER DVD-RW DVR-215", NULL
, ATA_HORKAGE_NOSETXFER
},
4167 { "PIONEER DVD-RW DVR-212D", NULL
, ATA_HORKAGE_NOSETXFER
},
4168 { "PIONEER DVD-RW DVR-216D", NULL
, ATA_HORKAGE_NOSETXFER
},
4175 * glob_match - match a text string against a glob-style pattern
4176 * @text: the string to be examined
4177 * @pattern: the glob-style pattern to be matched against
4179 * Either/both of text and pattern can be empty strings.
4181 * Match text against a glob-style pattern, with wildcards and simple sets:
4183 * ? matches any single character.
4184 * * matches any run of characters.
4185 * [xyz] matches a single character from the set: x, y, or z.
4186 * [a-d] matches a single character from the range: a, b, c, or d.
4187 * [a-d0-9] matches a single character from either range.
4189 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4190 * Behaviour with malformed patterns is undefined, though generally reasonable.
4192 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4194 * This function uses one level of recursion per '*' in pattern.
4195 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4196 * this will not cause stack problems for any reasonable use here.
4199 * 0 on match, 1 otherwise.
4201 static int glob_match (const char *text
, const char *pattern
)
4204 /* Match single character or a '?' wildcard */
4205 if (*text
== *pattern
|| *pattern
== '?') {
4207 return 0; /* End of both strings: match */
4209 /* Match single char against a '[' bracketed ']' pattern set */
4210 if (!*text
|| *pattern
!= '[')
4211 break; /* Not a pattern set */
4212 while (*++pattern
&& *pattern
!= ']' && *text
!= *pattern
) {
4213 if (*pattern
== '-' && *(pattern
- 1) != '[')
4214 if (*text
> *(pattern
- 1) && *text
< *(pattern
+ 1)) {
4219 if (!*pattern
|| *pattern
== ']')
4220 return 1; /* No match */
4221 while (*pattern
&& *pattern
++ != ']');
4223 } while (*++text
&& *pattern
);
4225 /* Match any run of chars against a '*' wildcard */
4226 if (*pattern
== '*') {
4228 return 0; /* Match: avoid recursion at end of pattern */
4229 /* Loop to handle additional pattern chars after the wildcard */
4231 if (glob_match(text
, pattern
) == 0)
4232 return 0; /* Remainder matched */
4233 ++text
; /* Absorb (match) this char and try again */
4236 if (!*text
&& !*pattern
)
4237 return 0; /* End of both strings: match */
4238 return 1; /* No match */
4241 static unsigned long ata_dev_blacklisted(const struct ata_device
*dev
)
4243 unsigned char model_num
[ATA_ID_PROD_LEN
+ 1];
4244 unsigned char model_rev
[ATA_ID_FW_REV_LEN
+ 1];
4245 const struct ata_blacklist_entry
*ad
= ata_device_blacklist
;
4247 ata_id_c_string(dev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
4248 ata_id_c_string(dev
->id
, model_rev
, ATA_ID_FW_REV
, sizeof(model_rev
));
4250 while (ad
->model_num
) {
4251 if (!glob_match(model_num
, ad
->model_num
)) {
4252 if (ad
->model_rev
== NULL
)
4254 if (!glob_match(model_rev
, ad
->model_rev
))
4262 static int ata_dma_blacklisted(const struct ata_device
*dev
)
4264 /* We don't support polling DMA.
4265 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4266 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4268 if ((dev
->link
->ap
->flags
& ATA_FLAG_PIO_POLLING
) &&
4269 (dev
->flags
& ATA_DFLAG_CDB_INTR
))
4271 return (dev
->horkage
& ATA_HORKAGE_NODMA
) ? 1 : 0;
4275 * ata_is_40wire - check drive side detection
4278 * Perform drive side detection decoding, allowing for device vendors
4279 * who can't follow the documentation.
4282 static int ata_is_40wire(struct ata_device
*dev
)
4284 if (dev
->horkage
& ATA_HORKAGE_IVB
)
4285 return ata_drive_40wire_relaxed(dev
->id
);
4286 return ata_drive_40wire(dev
->id
);
4290 * cable_is_40wire - 40/80/SATA decider
4291 * @ap: port to consider
4293 * This function encapsulates the policy for speed management
4294 * in one place. At the moment we don't cache the result but
4295 * there is a good case for setting ap->cbl to the result when
4296 * we are called with unknown cables (and figuring out if it
4297 * impacts hotplug at all).
4299 * Return 1 if the cable appears to be 40 wire.
4302 static int cable_is_40wire(struct ata_port
*ap
)
4304 struct ata_link
*link
;
4305 struct ata_device
*dev
;
4307 /* If the controller thinks we are 40 wire, we are. */
4308 if (ap
->cbl
== ATA_CBL_PATA40
)
4311 /* If the controller thinks we are 80 wire, we are. */
4312 if (ap
->cbl
== ATA_CBL_PATA80
|| ap
->cbl
== ATA_CBL_SATA
)
4315 /* If the system is known to be 40 wire short cable (eg
4316 * laptop), then we allow 80 wire modes even if the drive
4319 if (ap
->cbl
== ATA_CBL_PATA40_SHORT
)
4322 /* If the controller doesn't know, we scan.
4324 * Note: We look for all 40 wire detects at this point. Any
4325 * 80 wire detect is taken to be 80 wire cable because
4326 * - in many setups only the one drive (slave if present) will
4327 * give a valid detect
4328 * - if you have a non detect capable drive you don't want it
4329 * to colour the choice
4331 ata_for_each_link(link
, ap
, EDGE
) {
4332 ata_for_each_dev(dev
, link
, ENABLED
) {
4333 if (!ata_is_40wire(dev
))
4341 * ata_dev_xfermask - Compute supported xfermask of the given device
4342 * @dev: Device to compute xfermask for
4344 * Compute supported xfermask of @dev and store it in
4345 * dev->*_mask. This function is responsible for applying all
4346 * known limits including host controller limits, device
4352 static void ata_dev_xfermask(struct ata_device
*dev
)
4354 struct ata_link
*link
= dev
->link
;
4355 struct ata_port
*ap
= link
->ap
;
4356 struct ata_host
*host
= ap
->host
;
4357 unsigned long xfer_mask
;
4359 /* controller modes available */
4360 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
,
4361 ap
->mwdma_mask
, ap
->udma_mask
);
4363 /* drive modes available */
4364 xfer_mask
&= ata_pack_xfermask(dev
->pio_mask
,
4365 dev
->mwdma_mask
, dev
->udma_mask
);
4366 xfer_mask
&= ata_id_xfermask(dev
->id
);
4369 * CFA Advanced TrueIDE timings are not allowed on a shared
4372 if (ata_dev_pair(dev
)) {
4373 /* No PIO5 or PIO6 */
4374 xfer_mask
&= ~(0x03 << (ATA_SHIFT_PIO
+ 5));
4375 /* No MWDMA3 or MWDMA 4 */
4376 xfer_mask
&= ~(0x03 << (ATA_SHIFT_MWDMA
+ 3));
4379 if (ata_dma_blacklisted(dev
)) {
4380 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4382 "device is on DMA blacklist, disabling DMA\n");
4385 if ((host
->flags
& ATA_HOST_SIMPLEX
) &&
4386 host
->simplex_claimed
&& host
->simplex_claimed
!= ap
) {
4387 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
4389 "simplex DMA is claimed by other device, disabling DMA\n");
4392 if (ap
->flags
& ATA_FLAG_NO_IORDY
)
4393 xfer_mask
&= ata_pio_mask_no_iordy(dev
);
4395 if (ap
->ops
->mode_filter
)
4396 xfer_mask
= ap
->ops
->mode_filter(dev
, xfer_mask
);
4398 /* Apply cable rule here. Don't apply it early because when
4399 * we handle hot plug the cable type can itself change.
4400 * Check this last so that we know if the transfer rate was
4401 * solely limited by the cable.
4402 * Unknown or 80 wire cables reported host side are checked
4403 * drive side as well. Cases where we know a 40wire cable
4404 * is used safely for 80 are not checked here.
4406 if (xfer_mask
& (0xF8 << ATA_SHIFT_UDMA
))
4407 /* UDMA/44 or higher would be available */
4408 if (cable_is_40wire(ap
)) {
4410 "limited to UDMA/33 due to 40-wire cable\n");
4411 xfer_mask
&= ~(0xF8 << ATA_SHIFT_UDMA
);
4414 ata_unpack_xfermask(xfer_mask
, &dev
->pio_mask
,
4415 &dev
->mwdma_mask
, &dev
->udma_mask
);
4419 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4420 * @dev: Device to which command will be sent
4422 * Issue SET FEATURES - XFER MODE command to device @dev
4426 * PCI/etc. bus probe sem.
4429 * 0 on success, AC_ERR_* mask otherwise.
4432 static unsigned int ata_dev_set_xfermode(struct ata_device
*dev
)
4434 struct ata_taskfile tf
;
4435 unsigned int err_mask
;
4437 /* set up set-features taskfile */
4438 DPRINTK("set features - xfer mode\n");
4440 /* Some controllers and ATAPI devices show flaky interrupt
4441 * behavior after setting xfer mode. Use polling instead.
4443 ata_tf_init(dev
, &tf
);
4444 tf
.command
= ATA_CMD_SET_FEATURES
;
4445 tf
.feature
= SETFEATURES_XFER
;
4446 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_POLLING
;
4447 tf
.protocol
= ATA_PROT_NODATA
;
4448 /* If we are using IORDY we must send the mode setting command */
4449 if (ata_pio_need_iordy(dev
))
4450 tf
.nsect
= dev
->xfer_mode
;
4451 /* If the device has IORDY and the controller does not - turn it off */
4452 else if (ata_id_has_iordy(dev
->id
))
4454 else /* In the ancient relic department - skip all of this */
4457 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4459 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4464 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4465 * @dev: Device to which command will be sent
4466 * @enable: Whether to enable or disable the feature
4467 * @feature: The sector count represents the feature to set
4469 * Issue SET FEATURES - SATA FEATURES command to device @dev
4470 * on port @ap with sector count
4473 * PCI/etc. bus probe sem.
4476 * 0 on success, AC_ERR_* mask otherwise.
4478 unsigned int ata_dev_set_feature(struct ata_device
*dev
, u8 enable
, u8 feature
)
4480 struct ata_taskfile tf
;
4481 unsigned int err_mask
;
4483 /* set up set-features taskfile */
4484 DPRINTK("set features - SATA features\n");
4486 ata_tf_init(dev
, &tf
);
4487 tf
.command
= ATA_CMD_SET_FEATURES
;
4488 tf
.feature
= enable
;
4489 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4490 tf
.protocol
= ATA_PROT_NODATA
;
4493 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4495 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4498 EXPORT_SYMBOL_GPL(ata_dev_set_feature
);
4501 * ata_dev_init_params - Issue INIT DEV PARAMS command
4502 * @dev: Device to which command will be sent
4503 * @heads: Number of heads (taskfile parameter)
4504 * @sectors: Number of sectors (taskfile parameter)
4507 * Kernel thread context (may sleep)
4510 * 0 on success, AC_ERR_* mask otherwise.
4512 static unsigned int ata_dev_init_params(struct ata_device
*dev
,
4513 u16 heads
, u16 sectors
)
4515 struct ata_taskfile tf
;
4516 unsigned int err_mask
;
4518 /* Number of sectors per track 1-255. Number of heads 1-16 */
4519 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
4520 return AC_ERR_INVALID
;
4522 /* set up init dev params taskfile */
4523 DPRINTK("init dev params \n");
4525 ata_tf_init(dev
, &tf
);
4526 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
4527 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
4528 tf
.protocol
= ATA_PROT_NODATA
;
4530 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
4532 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
4533 /* A clean abort indicates an original or just out of spec drive
4534 and we should continue as we issue the setup based on the
4535 drive reported working geometry */
4536 if (err_mask
== AC_ERR_DEV
&& (tf
.feature
& ATA_ABORTED
))
4539 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
4544 * ata_sg_clean - Unmap DMA memory associated with command
4545 * @qc: Command containing DMA memory to be released
4547 * Unmap all mapped DMA memory associated with this command.
4550 * spin_lock_irqsave(host lock)
4552 void ata_sg_clean(struct ata_queued_cmd
*qc
)
4554 struct ata_port
*ap
= qc
->ap
;
4555 struct scatterlist
*sg
= qc
->sg
;
4556 int dir
= qc
->dma_dir
;
4558 WARN_ON_ONCE(sg
== NULL
);
4560 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
4563 dma_unmap_sg(ap
->dev
, sg
, qc
->orig_n_elem
, dir
);
4565 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4570 * atapi_check_dma - Check whether ATAPI DMA can be supported
4571 * @qc: Metadata associated with taskfile to check
4573 * Allow low-level driver to filter ATA PACKET commands, returning
4574 * a status indicating whether or not it is OK to use DMA for the
4575 * supplied PACKET command.
4578 * spin_lock_irqsave(host lock)
4580 * RETURNS: 0 when ATAPI DMA can be used
4583 int atapi_check_dma(struct ata_queued_cmd
*qc
)
4585 struct ata_port
*ap
= qc
->ap
;
4587 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4588 * few ATAPI devices choke on such DMA requests.
4590 if (!(qc
->dev
->horkage
& ATA_HORKAGE_ATAPI_MOD16_DMA
) &&
4591 unlikely(qc
->nbytes
& 15))
4594 if (ap
->ops
->check_atapi_dma
)
4595 return ap
->ops
->check_atapi_dma(qc
);
4601 * ata_std_qc_defer - Check whether a qc needs to be deferred
4602 * @qc: ATA command in question
4604 * Non-NCQ commands cannot run with any other command, NCQ or
4605 * not. As upper layer only knows the queue depth, we are
4606 * responsible for maintaining exclusion. This function checks
4607 * whether a new command @qc can be issued.
4610 * spin_lock_irqsave(host lock)
4613 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4615 int ata_std_qc_defer(struct ata_queued_cmd
*qc
)
4617 struct ata_link
*link
= qc
->dev
->link
;
4619 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4620 if (!ata_tag_valid(link
->active_tag
))
4623 if (!ata_tag_valid(link
->active_tag
) && !link
->sactive
)
4627 return ATA_DEFER_LINK
;
4630 void ata_noop_qc_prep(struct ata_queued_cmd
*qc
) { }
4633 * ata_sg_init - Associate command with scatter-gather table.
4634 * @qc: Command to be associated
4635 * @sg: Scatter-gather table.
4636 * @n_elem: Number of elements in s/g table.
4638 * Initialize the data-related elements of queued_cmd @qc
4639 * to point to a scatter-gather table @sg, containing @n_elem
4643 * spin_lock_irqsave(host lock)
4645 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
4646 unsigned int n_elem
)
4649 qc
->n_elem
= n_elem
;
4654 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4655 * @qc: Command with scatter-gather table to be mapped.
4657 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4660 * spin_lock_irqsave(host lock)
4663 * Zero on success, negative on error.
4666 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
4668 struct ata_port
*ap
= qc
->ap
;
4669 unsigned int n_elem
;
4671 VPRINTK("ENTER, ata%u\n", ap
->print_id
);
4673 n_elem
= dma_map_sg(ap
->dev
, qc
->sg
, qc
->n_elem
, qc
->dma_dir
);
4677 DPRINTK("%d sg elements mapped\n", n_elem
);
4678 qc
->orig_n_elem
= qc
->n_elem
;
4679 qc
->n_elem
= n_elem
;
4680 qc
->flags
|= ATA_QCFLAG_DMAMAP
;
4686 * swap_buf_le16 - swap halves of 16-bit words in place
4687 * @buf: Buffer to swap
4688 * @buf_words: Number of 16-bit words in buffer.
4690 * Swap halves of 16-bit words if needed to convert from
4691 * little-endian byte order to native cpu byte order, or
4695 * Inherited from caller.
4697 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
4702 for (i
= 0; i
< buf_words
; i
++)
4703 buf
[i
] = le16_to_cpu(buf
[i
]);
4704 #endif /* __BIG_ENDIAN */
4708 * ata_qc_new - Request an available ATA command, for queueing
4715 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
4717 struct ata_queued_cmd
*qc
= NULL
;
4720 /* no command while frozen */
4721 if (unlikely(ap
->pflags
& ATA_PFLAG_FROZEN
))
4724 /* the last tag is reserved for internal command. */
4725 for (i
= 0; i
< ATA_MAX_QUEUE
- 1; i
++)
4726 if (!test_and_set_bit(i
, &ap
->qc_allocated
)) {
4727 qc
= __ata_qc_from_tag(ap
, i
);
4738 * ata_qc_new_init - Request an available ATA command, and initialize it
4739 * @dev: Device from whom we request an available command structure
4745 struct ata_queued_cmd
*ata_qc_new_init(struct ata_device
*dev
)
4747 struct ata_port
*ap
= dev
->link
->ap
;
4748 struct ata_queued_cmd
*qc
;
4750 qc
= ata_qc_new(ap
);
4763 * ata_qc_free - free unused ata_queued_cmd
4764 * @qc: Command to complete
4766 * Designed to free unused ata_queued_cmd object
4767 * in case something prevents using it.
4770 * spin_lock_irqsave(host lock)
4772 void ata_qc_free(struct ata_queued_cmd
*qc
)
4774 struct ata_port
*ap
;
4777 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4782 if (likely(ata_tag_valid(tag
))) {
4783 qc
->tag
= ATA_TAG_POISON
;
4784 clear_bit(tag
, &ap
->qc_allocated
);
4788 void __ata_qc_complete(struct ata_queued_cmd
*qc
)
4790 struct ata_port
*ap
;
4791 struct ata_link
*link
;
4793 WARN_ON_ONCE(qc
== NULL
); /* ata_qc_from_tag _might_ return NULL */
4794 WARN_ON_ONCE(!(qc
->flags
& ATA_QCFLAG_ACTIVE
));
4796 link
= qc
->dev
->link
;
4798 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
4801 /* command should be marked inactive atomically with qc completion */
4802 if (qc
->tf
.protocol
== ATA_PROT_NCQ
) {
4803 link
->sactive
&= ~(1 << qc
->tag
);
4805 ap
->nr_active_links
--;
4807 link
->active_tag
= ATA_TAG_POISON
;
4808 ap
->nr_active_links
--;
4811 /* clear exclusive status */
4812 if (unlikely(qc
->flags
& ATA_QCFLAG_CLEAR_EXCL
&&
4813 ap
->excl_link
== link
))
4814 ap
->excl_link
= NULL
;
4816 /* atapi: mark qc as inactive to prevent the interrupt handler
4817 * from completing the command twice later, before the error handler
4818 * is called. (when rc != 0 and atapi request sense is needed)
4820 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
4821 ap
->qc_active
&= ~(1 << qc
->tag
);
4823 /* call completion callback */
4824 qc
->complete_fn(qc
);
4827 static void fill_result_tf(struct ata_queued_cmd
*qc
)
4829 struct ata_port
*ap
= qc
->ap
;
4831 qc
->result_tf
.flags
= qc
->tf
.flags
;
4832 ap
->ops
->qc_fill_rtf(qc
);
4835 static void ata_verify_xfer(struct ata_queued_cmd
*qc
)
4837 struct ata_device
*dev
= qc
->dev
;
4839 if (ata_is_nodata(qc
->tf
.protocol
))
4842 if ((dev
->mwdma_mask
|| dev
->udma_mask
) && ata_is_pio(qc
->tf
.protocol
))
4845 dev
->flags
&= ~ATA_DFLAG_DUBIOUS_XFER
;
4849 * ata_qc_complete - Complete an active ATA command
4850 * @qc: Command to complete
4852 * Indicate to the mid and upper layers that an ATA command has
4853 * completed, with either an ok or not-ok status.
4855 * Refrain from calling this function multiple times when
4856 * successfully completing multiple NCQ commands.
4857 * ata_qc_complete_multiple() should be used instead, which will
4858 * properly update IRQ expect state.
4861 * spin_lock_irqsave(host lock)
4863 void ata_qc_complete(struct ata_queued_cmd
*qc
)
4865 struct ata_port
*ap
= qc
->ap
;
4867 /* XXX: New EH and old EH use different mechanisms to
4868 * synchronize EH with regular execution path.
4870 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4871 * Normal execution path is responsible for not accessing a
4872 * failed qc. libata core enforces the rule by returning NULL
4873 * from ata_qc_from_tag() for failed qcs.
4875 * Old EH depends on ata_qc_complete() nullifying completion
4876 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4877 * not synchronize with interrupt handler. Only PIO task is
4880 if (ap
->ops
->error_handler
) {
4881 struct ata_device
*dev
= qc
->dev
;
4882 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4884 if (unlikely(qc
->err_mask
))
4885 qc
->flags
|= ATA_QCFLAG_FAILED
;
4888 * Finish internal commands without any further processing
4889 * and always with the result TF filled.
4891 if (unlikely(ata_tag_internal(qc
->tag
))) {
4893 __ata_qc_complete(qc
);
4898 * Non-internal qc has failed. Fill the result TF and
4901 if (unlikely(qc
->flags
& ATA_QCFLAG_FAILED
)) {
4903 ata_qc_schedule_eh(qc
);
4907 WARN_ON_ONCE(ap
->pflags
& ATA_PFLAG_FROZEN
);
4909 /* read result TF if requested */
4910 if (qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4913 /* Some commands need post-processing after successful
4916 switch (qc
->tf
.command
) {
4917 case ATA_CMD_SET_FEATURES
:
4918 if (qc
->tf
.feature
!= SETFEATURES_WC_ON
&&
4919 qc
->tf
.feature
!= SETFEATURES_WC_OFF
)
4922 case ATA_CMD_INIT_DEV_PARAMS
: /* CHS translation changed */
4923 case ATA_CMD_SET_MULTI
: /* multi_count changed */
4924 /* revalidate device */
4925 ehi
->dev_action
[dev
->devno
] |= ATA_EH_REVALIDATE
;
4926 ata_port_schedule_eh(ap
);
4930 dev
->flags
|= ATA_DFLAG_SLEEPING
;
4934 if (unlikely(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
))
4935 ata_verify_xfer(qc
);
4937 __ata_qc_complete(qc
);
4939 if (qc
->flags
& ATA_QCFLAG_EH_SCHEDULED
)
4942 /* read result TF if failed or requested */
4943 if (qc
->err_mask
|| qc
->flags
& ATA_QCFLAG_RESULT_TF
)
4946 __ata_qc_complete(qc
);
4951 * ata_qc_complete_multiple - Complete multiple qcs successfully
4952 * @ap: port in question
4953 * @qc_active: new qc_active mask
4955 * Complete in-flight commands. This functions is meant to be
4956 * called from low-level driver's interrupt routine to complete
4957 * requests normally. ap->qc_active and @qc_active is compared
4958 * and commands are completed accordingly.
4960 * Always use this function when completing multiple NCQ commands
4961 * from IRQ handlers instead of calling ata_qc_complete()
4962 * multiple times to keep IRQ expect status properly in sync.
4965 * spin_lock_irqsave(host lock)
4968 * Number of completed commands on success, -errno otherwise.
4970 int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
)
4975 done_mask
= ap
->qc_active
^ qc_active
;
4977 if (unlikely(done_mask
& qc_active
)) {
4978 ata_port_err(ap
, "illegal qc_active transition (%08x->%08x)\n",
4979 ap
->qc_active
, qc_active
);
4984 struct ata_queued_cmd
*qc
;
4985 unsigned int tag
= __ffs(done_mask
);
4987 qc
= ata_qc_from_tag(ap
, tag
);
4989 ata_qc_complete(qc
);
4992 done_mask
&= ~(1 << tag
);
4999 * ata_qc_issue - issue taskfile to device
5000 * @qc: command to issue to device
5002 * Prepare an ATA command to submission to device.
5003 * This includes mapping the data into a DMA-able
5004 * area, filling in the S/G table, and finally
5005 * writing the taskfile to hardware, starting the command.
5008 * spin_lock_irqsave(host lock)
5010 void ata_qc_issue(struct ata_queued_cmd
*qc
)
5012 struct ata_port
*ap
= qc
->ap
;
5013 struct ata_link
*link
= qc
->dev
->link
;
5014 u8 prot
= qc
->tf
.protocol
;
5016 /* Make sure only one non-NCQ command is outstanding. The
5017 * check is skipped for old EH because it reuses active qc to
5018 * request ATAPI sense.
5020 WARN_ON_ONCE(ap
->ops
->error_handler
&& ata_tag_valid(link
->active_tag
));
5022 if (ata_is_ncq(prot
)) {
5023 WARN_ON_ONCE(link
->sactive
& (1 << qc
->tag
));
5026 ap
->nr_active_links
++;
5027 link
->sactive
|= 1 << qc
->tag
;
5029 WARN_ON_ONCE(link
->sactive
);
5031 ap
->nr_active_links
++;
5032 link
->active_tag
= qc
->tag
;
5035 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
5036 ap
->qc_active
|= 1 << qc
->tag
;
5039 * We guarantee to LLDs that they will have at least one
5040 * non-zero sg if the command is a data command.
5042 if (WARN_ON_ONCE(ata_is_data(prot
) &&
5043 (!qc
->sg
|| !qc
->n_elem
|| !qc
->nbytes
)))
5046 if (ata_is_dma(prot
) || (ata_is_pio(prot
) &&
5047 (ap
->flags
& ATA_FLAG_PIO_DMA
)))
5048 if (ata_sg_setup(qc
))
5051 /* if device is sleeping, schedule reset and abort the link */
5052 if (unlikely(qc
->dev
->flags
& ATA_DFLAG_SLEEPING
)) {
5053 link
->eh_info
.action
|= ATA_EH_RESET
;
5054 ata_ehi_push_desc(&link
->eh_info
, "waking up from sleep");
5055 ata_link_abort(link
);
5059 ap
->ops
->qc_prep(qc
);
5061 qc
->err_mask
|= ap
->ops
->qc_issue(qc
);
5062 if (unlikely(qc
->err_mask
))
5067 qc
->err_mask
|= AC_ERR_SYSTEM
;
5069 ata_qc_complete(qc
);
5073 * sata_scr_valid - test whether SCRs are accessible
5074 * @link: ATA link to test SCR accessibility for
5076 * Test whether SCRs are accessible for @link.
5082 * 1 if SCRs are accessible, 0 otherwise.
5084 int sata_scr_valid(struct ata_link
*link
)
5086 struct ata_port
*ap
= link
->ap
;
5088 return (ap
->flags
& ATA_FLAG_SATA
) && ap
->ops
->scr_read
;
5092 * sata_scr_read - read SCR register of the specified port
5093 * @link: ATA link to read SCR for
5095 * @val: Place to store read value
5097 * Read SCR register @reg of @link into *@val. This function is
5098 * guaranteed to succeed if @link is ap->link, the cable type of
5099 * the port is SATA and the port implements ->scr_read.
5102 * None if @link is ap->link. Kernel thread context otherwise.
5105 * 0 on success, negative errno on failure.
5107 int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
)
5109 if (ata_is_host_link(link
)) {
5110 if (sata_scr_valid(link
))
5111 return link
->ap
->ops
->scr_read(link
, reg
, val
);
5115 return sata_pmp_scr_read(link
, reg
, val
);
5119 * sata_scr_write - write SCR register of the specified port
5120 * @link: ATA link to write SCR for
5121 * @reg: SCR to write
5122 * @val: value to write
5124 * Write @val to SCR register @reg of @link. This function is
5125 * guaranteed to succeed if @link is ap->link, the cable type of
5126 * the port is SATA and the port implements ->scr_read.
5129 * None if @link is ap->link. Kernel thread context otherwise.
5132 * 0 on success, negative errno on failure.
5134 int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
)
5136 if (ata_is_host_link(link
)) {
5137 if (sata_scr_valid(link
))
5138 return link
->ap
->ops
->scr_write(link
, reg
, val
);
5142 return sata_pmp_scr_write(link
, reg
, val
);
5146 * sata_scr_write_flush - write SCR register of the specified port and flush
5147 * @link: ATA link to write SCR for
5148 * @reg: SCR to write
5149 * @val: value to write
5151 * This function is identical to sata_scr_write() except that this
5152 * function performs flush after writing to the register.
5155 * None if @link is ap->link. Kernel thread context otherwise.
5158 * 0 on success, negative errno on failure.
5160 int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
)
5162 if (ata_is_host_link(link
)) {
5165 if (sata_scr_valid(link
)) {
5166 rc
= link
->ap
->ops
->scr_write(link
, reg
, val
);
5168 rc
= link
->ap
->ops
->scr_read(link
, reg
, &val
);
5174 return sata_pmp_scr_write(link
, reg
, val
);
5178 * ata_phys_link_online - test whether the given link is online
5179 * @link: ATA link to test
5181 * Test whether @link is online. Note that this function returns
5182 * 0 if online status of @link cannot be obtained, so
5183 * ata_link_online(link) != !ata_link_offline(link).
5189 * True if the port online status is available and online.
5191 bool ata_phys_link_online(struct ata_link
*link
)
5195 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5196 ata_sstatus_online(sstatus
))
5202 * ata_phys_link_offline - test whether the given link is offline
5203 * @link: ATA link to test
5205 * Test whether @link is offline. Note that this function
5206 * returns 0 if offline status of @link cannot be obtained, so
5207 * ata_link_online(link) != !ata_link_offline(link).
5213 * True if the port offline status is available and offline.
5215 bool ata_phys_link_offline(struct ata_link
*link
)
5219 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0 &&
5220 !ata_sstatus_online(sstatus
))
5226 * ata_link_online - test whether the given link is online
5227 * @link: ATA link to test
5229 * Test whether @link is online. This is identical to
5230 * ata_phys_link_online() when there's no slave link. When
5231 * there's a slave link, this function should only be called on
5232 * the master link and will return true if any of M/S links is
5239 * True if the port online status is available and online.
5241 bool ata_link_online(struct ata_link
*link
)
5243 struct ata_link
*slave
= link
->ap
->slave_link
;
5245 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5247 return ata_phys_link_online(link
) ||
5248 (slave
&& ata_phys_link_online(slave
));
5252 * ata_link_offline - test whether the given link is offline
5253 * @link: ATA link to test
5255 * Test whether @link is offline. This is identical to
5256 * ata_phys_link_offline() when there's no slave link. When
5257 * there's a slave link, this function should only be called on
5258 * the master link and will return true if both M/S links are
5265 * True if the port offline status is available and offline.
5267 bool ata_link_offline(struct ata_link
*link
)
5269 struct ata_link
*slave
= link
->ap
->slave_link
;
5271 WARN_ON(link
== slave
); /* shouldn't be called on slave link */
5273 return ata_phys_link_offline(link
) &&
5274 (!slave
|| ata_phys_link_offline(slave
));
5278 static int ata_port_request_pm(struct ata_port
*ap
, pm_message_t mesg
,
5279 unsigned int action
, unsigned int ehi_flags
,
5282 struct ata_link
*link
;
5283 unsigned long flags
;
5286 /* Previous resume operation might still be in
5287 * progress. Wait for PM_PENDING to clear.
5289 if (ap
->pflags
& ATA_PFLAG_PM_PENDING
) {
5294 ata_port_wait_eh(ap
);
5295 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5298 /* request PM ops to EH */
5299 spin_lock_irqsave(ap
->lock
, flags
);
5303 ap
->pm_result
= async
;
5305 ap
->pm_result
= &rc
;
5307 ap
->pflags
|= ATA_PFLAG_PM_PENDING
;
5308 ata_for_each_link(link
, ap
, HOST_FIRST
) {
5309 link
->eh_info
.action
|= action
;
5310 link
->eh_info
.flags
|= ehi_flags
;
5313 ata_port_schedule_eh(ap
);
5315 spin_unlock_irqrestore(ap
->lock
, flags
);
5317 /* wait and check result */
5319 ata_port_wait_eh(ap
);
5320 WARN_ON(ap
->pflags
& ATA_PFLAG_PM_PENDING
);
5326 static int __ata_port_suspend_common(struct ata_port
*ap
, pm_message_t mesg
, int *async
)
5328 unsigned int ehi_flags
= ATA_EHI_QUIET
;
5332 * On some hardware, device fails to respond after spun down
5333 * for suspend. As the device won't be used before being
5334 * resumed, we don't need to touch the device. Ask EH to skip
5335 * the usual stuff and proceed directly to suspend.
5337 * http://thread.gmane.org/gmane.linux.ide/46764
5339 if (mesg
.event
== PM_EVENT_SUSPEND
)
5340 ehi_flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_NO_RECOVERY
;
5342 rc
= ata_port_request_pm(ap
, mesg
, 0, ehi_flags
, async
);
5346 static int ata_port_suspend_common(struct device
*dev
, pm_message_t mesg
)
5348 struct ata_port
*ap
= to_ata_port(dev
);
5350 return __ata_port_suspend_common(ap
, mesg
, NULL
);
5353 static int ata_port_suspend(struct device
*dev
)
5355 if (pm_runtime_suspended(dev
))
5358 return ata_port_suspend_common(dev
, PMSG_SUSPEND
);
5361 static int ata_port_do_freeze(struct device
*dev
)
5363 if (pm_runtime_suspended(dev
))
5364 pm_runtime_resume(dev
);
5366 return ata_port_suspend_common(dev
, PMSG_FREEZE
);
5369 static int ata_port_poweroff(struct device
*dev
)
5371 if (pm_runtime_suspended(dev
))
5374 return ata_port_suspend_common(dev
, PMSG_HIBERNATE
);
5377 static int __ata_port_resume_common(struct ata_port
*ap
, int *async
)
5381 rc
= ata_port_request_pm(ap
, PMSG_ON
, ATA_EH_RESET
,
5382 ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
, async
);
5386 static int ata_port_resume_common(struct device
*dev
)
5388 struct ata_port
*ap
= to_ata_port(dev
);
5390 return __ata_port_resume_common(ap
, NULL
);
5393 static int ata_port_resume(struct device
*dev
)
5397 rc
= ata_port_resume_common(dev
);
5399 pm_runtime_disable(dev
);
5400 pm_runtime_set_active(dev
);
5401 pm_runtime_enable(dev
);
5407 static int ata_port_runtime_idle(struct device
*dev
)
5409 return pm_runtime_suspend(dev
);
5412 static const struct dev_pm_ops ata_port_pm_ops
= {
5413 .suspend
= ata_port_suspend
,
5414 .resume
= ata_port_resume
,
5415 .freeze
= ata_port_do_freeze
,
5416 .thaw
= ata_port_resume
,
5417 .poweroff
= ata_port_poweroff
,
5418 .restore
= ata_port_resume
,
5420 .runtime_suspend
= ata_port_suspend
,
5421 .runtime_resume
= ata_port_resume_common
,
5422 .runtime_idle
= ata_port_runtime_idle
,
5425 /* sas ports don't participate in pm runtime management of ata_ports,
5426 * and need to resume ata devices at the domain level, not the per-port
5427 * level. sas suspend/resume is async to allow parallel port recovery
5428 * since sas has multiple ata_port instances per Scsi_Host.
5430 int ata_sas_port_async_suspend(struct ata_port
*ap
, int *async
)
5432 return __ata_port_suspend_common(ap
, PMSG_SUSPEND
, async
);
5434 EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend
);
5436 int ata_sas_port_async_resume(struct ata_port
*ap
, int *async
)
5438 return __ata_port_resume_common(ap
, async
);
5440 EXPORT_SYMBOL_GPL(ata_sas_port_async_resume
);
5444 * ata_host_suspend - suspend host
5445 * @host: host to suspend
5448 * Suspend @host. Actual operation is performed by port suspend.
5450 int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
)
5452 host
->dev
->power
.power_state
= mesg
;
5457 * ata_host_resume - resume host
5458 * @host: host to resume
5460 * Resume @host. Actual operation is performed by port resume.
5462 void ata_host_resume(struct ata_host
*host
)
5464 host
->dev
->power
.power_state
= PMSG_ON
;
5468 struct device_type ata_port_type
= {
5471 .pm
= &ata_port_pm_ops
,
5476 * ata_dev_init - Initialize an ata_device structure
5477 * @dev: Device structure to initialize
5479 * Initialize @dev in preparation for probing.
5482 * Inherited from caller.
5484 void ata_dev_init(struct ata_device
*dev
)
5486 struct ata_link
*link
= ata_dev_phys_link(dev
);
5487 struct ata_port
*ap
= link
->ap
;
5488 unsigned long flags
;
5490 /* SATA spd limit is bound to the attached device, reset together */
5491 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5494 /* High bits of dev->flags are used to record warm plug
5495 * requests which occur asynchronously. Synchronize using
5498 spin_lock_irqsave(ap
->lock
, flags
);
5499 dev
->flags
&= ~ATA_DFLAG_INIT_MASK
;
5501 spin_unlock_irqrestore(ap
->lock
, flags
);
5503 memset((void *)dev
+ ATA_DEVICE_CLEAR_BEGIN
, 0,
5504 ATA_DEVICE_CLEAR_END
- ATA_DEVICE_CLEAR_BEGIN
);
5505 dev
->pio_mask
= UINT_MAX
;
5506 dev
->mwdma_mask
= UINT_MAX
;
5507 dev
->udma_mask
= UINT_MAX
;
5511 * ata_link_init - Initialize an ata_link structure
5512 * @ap: ATA port link is attached to
5513 * @link: Link structure to initialize
5514 * @pmp: Port multiplier port number
5519 * Kernel thread context (may sleep)
5521 void ata_link_init(struct ata_port
*ap
, struct ata_link
*link
, int pmp
)
5525 /* clear everything except for devices */
5526 memset((void *)link
+ ATA_LINK_CLEAR_BEGIN
, 0,
5527 ATA_LINK_CLEAR_END
- ATA_LINK_CLEAR_BEGIN
);
5531 link
->active_tag
= ATA_TAG_POISON
;
5532 link
->hw_sata_spd_limit
= UINT_MAX
;
5534 /* can't use iterator, ap isn't initialized yet */
5535 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
5536 struct ata_device
*dev
= &link
->device
[i
];
5539 dev
->devno
= dev
- link
->device
;
5540 #ifdef CONFIG_ATA_ACPI
5541 dev
->gtf_filter
= ata_acpi_gtf_filter
;
5548 * sata_link_init_spd - Initialize link->sata_spd_limit
5549 * @link: Link to configure sata_spd_limit for
5551 * Initialize @link->[hw_]sata_spd_limit to the currently
5555 * Kernel thread context (may sleep).
5558 * 0 on success, -errno on failure.
5560 int sata_link_init_spd(struct ata_link
*link
)
5565 rc
= sata_scr_read(link
, SCR_CONTROL
, &link
->saved_scontrol
);
5569 spd
= (link
->saved_scontrol
>> 4) & 0xf;
5571 link
->hw_sata_spd_limit
&= (1 << spd
) - 1;
5573 ata_force_link_limits(link
);
5575 link
->sata_spd_limit
= link
->hw_sata_spd_limit
;
5581 * ata_port_alloc - allocate and initialize basic ATA port resources
5582 * @host: ATA host this allocated port belongs to
5584 * Allocate and initialize basic ATA port resources.
5587 * Allocate ATA port on success, NULL on failure.
5590 * Inherited from calling layer (may sleep).
5592 struct ata_port
*ata_port_alloc(struct ata_host
*host
)
5594 struct ata_port
*ap
;
5598 ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
5602 ap
->pflags
|= ATA_PFLAG_INITIALIZING
| ATA_PFLAG_FROZEN
;
5603 ap
->lock
= &host
->lock
;
5606 ap
->dev
= host
->dev
;
5608 #if defined(ATA_VERBOSE_DEBUG)
5609 /* turn on all debugging levels */
5610 ap
->msg_enable
= 0x00FF;
5611 #elif defined(ATA_DEBUG)
5612 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_INFO
| ATA_MSG_CTL
| ATA_MSG_WARN
| ATA_MSG_ERR
;
5614 ap
->msg_enable
= ATA_MSG_DRV
| ATA_MSG_ERR
| ATA_MSG_WARN
;
5617 mutex_init(&ap
->scsi_scan_mutex
);
5618 INIT_DELAYED_WORK(&ap
->hotplug_task
, ata_scsi_hotplug
);
5619 INIT_WORK(&ap
->scsi_rescan_task
, ata_scsi_dev_rescan
);
5620 INIT_LIST_HEAD(&ap
->eh_done_q
);
5621 init_waitqueue_head(&ap
->eh_wait_q
);
5622 init_completion(&ap
->park_req_pending
);
5623 init_timer_deferrable(&ap
->fastdrain_timer
);
5624 ap
->fastdrain_timer
.function
= ata_eh_fastdrain_timerfn
;
5625 ap
->fastdrain_timer
.data
= (unsigned long)ap
;
5627 ap
->cbl
= ATA_CBL_NONE
;
5629 ata_link_init(ap
, &ap
->link
, 0);
5632 ap
->stats
.unhandled_irq
= 1;
5633 ap
->stats
.idle_irq
= 1;
5635 ata_sff_port_init(ap
);
5640 static void ata_host_release(struct device
*gendev
, void *res
)
5642 struct ata_host
*host
= dev_get_drvdata(gendev
);
5645 for (i
= 0; i
< host
->n_ports
; i
++) {
5646 struct ata_port
*ap
= host
->ports
[i
];
5652 scsi_host_put(ap
->scsi_host
);
5654 kfree(ap
->pmp_link
);
5655 kfree(ap
->slave_link
);
5657 host
->ports
[i
] = NULL
;
5660 dev_set_drvdata(gendev
, NULL
);
5664 * ata_host_alloc - allocate and init basic ATA host resources
5665 * @dev: generic device this host is associated with
5666 * @max_ports: maximum number of ATA ports associated with this host
5668 * Allocate and initialize basic ATA host resources. LLD calls
5669 * this function to allocate a host, initializes it fully and
5670 * attaches it using ata_host_register().
5672 * @max_ports ports are allocated and host->n_ports is
5673 * initialized to @max_ports. The caller is allowed to decrease
5674 * host->n_ports before calling ata_host_register(). The unused
5675 * ports will be automatically freed on registration.
5678 * Allocate ATA host on success, NULL on failure.
5681 * Inherited from calling layer (may sleep).
5683 struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
)
5685 struct ata_host
*host
;
5691 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
5694 /* alloc a container for our list of ATA ports (buses) */
5695 sz
= sizeof(struct ata_host
) + (max_ports
+ 1) * sizeof(void *);
5696 /* alloc a container for our list of ATA ports (buses) */
5697 host
= devres_alloc(ata_host_release
, sz
, GFP_KERNEL
);
5701 devres_add(dev
, host
);
5702 dev_set_drvdata(dev
, host
);
5704 spin_lock_init(&host
->lock
);
5705 mutex_init(&host
->eh_mutex
);
5707 host
->n_ports
= max_ports
;
5709 /* allocate ports bound to this host */
5710 for (i
= 0; i
< max_ports
; i
++) {
5711 struct ata_port
*ap
;
5713 ap
= ata_port_alloc(host
);
5718 host
->ports
[i
] = ap
;
5721 devres_remove_group(dev
, NULL
);
5725 devres_release_group(dev
, NULL
);
5730 * ata_host_alloc_pinfo - alloc host and init with port_info array
5731 * @dev: generic device this host is associated with
5732 * @ppi: array of ATA port_info to initialize host with
5733 * @n_ports: number of ATA ports attached to this host
5735 * Allocate ATA host and initialize with info from @ppi. If NULL
5736 * terminated, @ppi may contain fewer entries than @n_ports. The
5737 * last entry will be used for the remaining ports.
5740 * Allocate ATA host on success, NULL on failure.
5743 * Inherited from calling layer (may sleep).
5745 struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
5746 const struct ata_port_info
* const * ppi
,
5749 const struct ata_port_info
*pi
;
5750 struct ata_host
*host
;
5753 host
= ata_host_alloc(dev
, n_ports
);
5757 for (i
= 0, j
= 0, pi
= NULL
; i
< host
->n_ports
; i
++) {
5758 struct ata_port
*ap
= host
->ports
[i
];
5763 ap
->pio_mask
= pi
->pio_mask
;
5764 ap
->mwdma_mask
= pi
->mwdma_mask
;
5765 ap
->udma_mask
= pi
->udma_mask
;
5766 ap
->flags
|= pi
->flags
;
5767 ap
->link
.flags
|= pi
->link_flags
;
5768 ap
->ops
= pi
->port_ops
;
5770 if (!host
->ops
&& (pi
->port_ops
!= &ata_dummy_port_ops
))
5771 host
->ops
= pi
->port_ops
;
5778 * ata_slave_link_init - initialize slave link
5779 * @ap: port to initialize slave link for
5781 * Create and initialize slave link for @ap. This enables slave
5782 * link handling on the port.
5784 * In libata, a port contains links and a link contains devices.
5785 * There is single host link but if a PMP is attached to it,
5786 * there can be multiple fan-out links. On SATA, there's usually
5787 * a single device connected to a link but PATA and SATA
5788 * controllers emulating TF based interface can have two - master
5791 * However, there are a few controllers which don't fit into this
5792 * abstraction too well - SATA controllers which emulate TF
5793 * interface with both master and slave devices but also have
5794 * separate SCR register sets for each device. These controllers
5795 * need separate links for physical link handling
5796 * (e.g. onlineness, link speed) but should be treated like a
5797 * traditional M/S controller for everything else (e.g. command
5798 * issue, softreset).
5800 * slave_link is libata's way of handling this class of
5801 * controllers without impacting core layer too much. For
5802 * anything other than physical link handling, the default host
5803 * link is used for both master and slave. For physical link
5804 * handling, separate @ap->slave_link is used. All dirty details
5805 * are implemented inside libata core layer. From LLD's POV, the
5806 * only difference is that prereset, hardreset and postreset are
5807 * called once more for the slave link, so the reset sequence
5808 * looks like the following.
5810 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5811 * softreset(M) -> postreset(M) -> postreset(S)
5813 * Note that softreset is called only for the master. Softreset
5814 * resets both M/S by definition, so SRST on master should handle
5815 * both (the standard method will work just fine).
5818 * Should be called before host is registered.
5821 * 0 on success, -errno on failure.
5823 int ata_slave_link_init(struct ata_port
*ap
)
5825 struct ata_link
*link
;
5827 WARN_ON(ap
->slave_link
);
5828 WARN_ON(ap
->flags
& ATA_FLAG_PMP
);
5830 link
= kzalloc(sizeof(*link
), GFP_KERNEL
);
5834 ata_link_init(ap
, link
, 1);
5835 ap
->slave_link
= link
;
5839 static void ata_host_stop(struct device
*gendev
, void *res
)
5841 struct ata_host
*host
= dev_get_drvdata(gendev
);
5844 WARN_ON(!(host
->flags
& ATA_HOST_STARTED
));
5846 for (i
= 0; i
< host
->n_ports
; i
++) {
5847 struct ata_port
*ap
= host
->ports
[i
];
5849 if (ap
->ops
->port_stop
)
5850 ap
->ops
->port_stop(ap
);
5853 if (host
->ops
->host_stop
)
5854 host
->ops
->host_stop(host
);
5858 * ata_finalize_port_ops - finalize ata_port_operations
5859 * @ops: ata_port_operations to finalize
5861 * An ata_port_operations can inherit from another ops and that
5862 * ops can again inherit from another. This can go on as many
5863 * times as necessary as long as there is no loop in the
5864 * inheritance chain.
5866 * Ops tables are finalized when the host is started. NULL or
5867 * unspecified entries are inherited from the closet ancestor
5868 * which has the method and the entry is populated with it.
5869 * After finalization, the ops table directly points to all the
5870 * methods and ->inherits is no longer necessary and cleared.
5872 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5877 static void ata_finalize_port_ops(struct ata_port_operations
*ops
)
5879 static DEFINE_SPINLOCK(lock
);
5880 const struct ata_port_operations
*cur
;
5881 void **begin
= (void **)ops
;
5882 void **end
= (void **)&ops
->inherits
;
5885 if (!ops
|| !ops
->inherits
)
5890 for (cur
= ops
->inherits
; cur
; cur
= cur
->inherits
) {
5891 void **inherit
= (void **)cur
;
5893 for (pp
= begin
; pp
< end
; pp
++, inherit
++)
5898 for (pp
= begin
; pp
< end
; pp
++)
5902 ops
->inherits
= NULL
;
5908 * ata_host_start - start and freeze ports of an ATA host
5909 * @host: ATA host to start ports for
5911 * Start and then freeze ports of @host. Started status is
5912 * recorded in host->flags, so this function can be called
5913 * multiple times. Ports are guaranteed to get started only
5914 * once. If host->ops isn't initialized yet, its set to the
5915 * first non-dummy port ops.
5918 * Inherited from calling layer (may sleep).
5921 * 0 if all ports are started successfully, -errno otherwise.
5923 int ata_host_start(struct ata_host
*host
)
5926 void *start_dr
= NULL
;
5929 if (host
->flags
& ATA_HOST_STARTED
)
5932 ata_finalize_port_ops(host
->ops
);
5934 for (i
= 0; i
< host
->n_ports
; i
++) {
5935 struct ata_port
*ap
= host
->ports
[i
];
5937 ata_finalize_port_ops(ap
->ops
);
5939 if (!host
->ops
&& !ata_port_is_dummy(ap
))
5940 host
->ops
= ap
->ops
;
5942 if (ap
->ops
->port_stop
)
5946 if (host
->ops
->host_stop
)
5950 start_dr
= devres_alloc(ata_host_stop
, 0, GFP_KERNEL
);
5955 for (i
= 0; i
< host
->n_ports
; i
++) {
5956 struct ata_port
*ap
= host
->ports
[i
];
5958 if (ap
->ops
->port_start
) {
5959 rc
= ap
->ops
->port_start(ap
);
5963 "failed to start port %d (errno=%d)\n",
5968 ata_eh_freeze_port(ap
);
5972 devres_add(host
->dev
, start_dr
);
5973 host
->flags
|= ATA_HOST_STARTED
;
5978 struct ata_port
*ap
= host
->ports
[i
];
5980 if (ap
->ops
->port_stop
)
5981 ap
->ops
->port_stop(ap
);
5983 devres_free(start_dr
);
5988 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
5989 * @host: host to initialize
5990 * @dev: device host is attached to
5994 void ata_host_init(struct ata_host
*host
, struct device
*dev
,
5995 struct ata_port_operations
*ops
)
5997 spin_lock_init(&host
->lock
);
5998 mutex_init(&host
->eh_mutex
);
6003 void __ata_port_probe(struct ata_port
*ap
)
6005 struct ata_eh_info
*ehi
= &ap
->link
.eh_info
;
6006 unsigned long flags
;
6008 /* kick EH for boot probing */
6009 spin_lock_irqsave(ap
->lock
, flags
);
6011 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
6012 ehi
->action
|= ATA_EH_RESET
;
6013 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
6015 ap
->pflags
&= ~ATA_PFLAG_INITIALIZING
;
6016 ap
->pflags
|= ATA_PFLAG_LOADING
;
6017 ata_port_schedule_eh(ap
);
6019 spin_unlock_irqrestore(ap
->lock
, flags
);
6022 int ata_port_probe(struct ata_port
*ap
)
6026 if (ap
->ops
->error_handler
) {
6027 __ata_port_probe(ap
);
6028 ata_port_wait_eh(ap
);
6030 DPRINTK("ata%u: bus probe begin\n", ap
->print_id
);
6031 rc
= ata_bus_probe(ap
);
6032 DPRINTK("ata%u: bus probe end\n", ap
->print_id
);
6038 static void async_port_probe(void *data
, async_cookie_t cookie
)
6040 struct ata_port
*ap
= data
;
6043 * If we're not allowed to scan this host in parallel,
6044 * we need to wait until all previous scans have completed
6045 * before going further.
6046 * Jeff Garzik says this is only within a controller, so we
6047 * don't need to wait for port 0, only for later ports.
6049 if (!(ap
->host
->flags
& ATA_HOST_PARALLEL_SCAN
) && ap
->port_no
!= 0)
6050 async_synchronize_cookie(cookie
);
6052 (void)ata_port_probe(ap
);
6054 /* in order to keep device order, we need to synchronize at this point */
6055 async_synchronize_cookie(cookie
);
6057 ata_scsi_scan_host(ap
, 1);
6061 * ata_host_register - register initialized ATA host
6062 * @host: ATA host to register
6063 * @sht: template for SCSI host
6065 * Register initialized ATA host. @host is allocated using
6066 * ata_host_alloc() and fully initialized by LLD. This function
6067 * starts ports, registers @host with ATA and SCSI layers and
6068 * probe registered devices.
6071 * Inherited from calling layer (may sleep).
6074 * 0 on success, -errno otherwise.
6076 int ata_host_register(struct ata_host
*host
, struct scsi_host_template
*sht
)
6080 /* host must have been started */
6081 if (!(host
->flags
& ATA_HOST_STARTED
)) {
6082 dev_err(host
->dev
, "BUG: trying to register unstarted host\n");
6087 /* Blow away unused ports. This happens when LLD can't
6088 * determine the exact number of ports to allocate at
6091 for (i
= host
->n_ports
; host
->ports
[i
]; i
++)
6092 kfree(host
->ports
[i
]);
6094 /* give ports names and add SCSI hosts */
6095 for (i
= 0; i
< host
->n_ports
; i
++)
6096 host
->ports
[i
]->print_id
= atomic_inc_return(&ata_print_id
);
6099 /* Create associated sysfs transport objects */
6100 for (i
= 0; i
< host
->n_ports
; i
++) {
6101 rc
= ata_tport_add(host
->dev
,host
->ports
[i
]);
6107 rc
= ata_scsi_add_hosts(host
, sht
);
6111 /* set cable, sata_spd_limit and report */
6112 for (i
= 0; i
< host
->n_ports
; i
++) {
6113 struct ata_port
*ap
= host
->ports
[i
];
6114 unsigned long xfer_mask
;
6116 /* set SATA cable type if still unset */
6117 if (ap
->cbl
== ATA_CBL_NONE
&& (ap
->flags
& ATA_FLAG_SATA
))
6118 ap
->cbl
= ATA_CBL_SATA
;
6120 /* init sata_spd_limit to the current value */
6121 sata_link_init_spd(&ap
->link
);
6123 sata_link_init_spd(ap
->slave_link
);
6125 /* print per-port info to dmesg */
6126 xfer_mask
= ata_pack_xfermask(ap
->pio_mask
, ap
->mwdma_mask
,
6129 if (!ata_port_is_dummy(ap
)) {
6130 ata_port_info(ap
, "%cATA max %s %s\n",
6131 (ap
->flags
& ATA_FLAG_SATA
) ? 'S' : 'P',
6132 ata_mode_string(xfer_mask
),
6133 ap
->link
.eh_info
.desc
);
6134 ata_ehi_clear_desc(&ap
->link
.eh_info
);
6136 ata_port_info(ap
, "DUMMY\n");
6139 /* perform each probe asynchronously */
6140 for (i
= 0; i
< host
->n_ports
; i
++) {
6141 struct ata_port
*ap
= host
->ports
[i
];
6142 async_schedule(async_port_probe
, ap
);
6149 ata_tport_delete(host
->ports
[i
]);
6156 * ata_host_activate - start host, request IRQ and register it
6157 * @host: target ATA host
6158 * @irq: IRQ to request
6159 * @irq_handler: irq_handler used when requesting IRQ
6160 * @irq_flags: irq_flags used when requesting IRQ
6161 * @sht: scsi_host_template to use when registering the host
6163 * After allocating an ATA host and initializing it, most libata
6164 * LLDs perform three steps to activate the host - start host,
6165 * request IRQ and register it. This helper takes necessasry
6166 * arguments and performs the three steps in one go.
6168 * An invalid IRQ skips the IRQ registration and expects the host to
6169 * have set polling mode on the port. In this case, @irq_handler
6173 * Inherited from calling layer (may sleep).
6176 * 0 on success, -errno otherwise.
6178 int ata_host_activate(struct ata_host
*host
, int irq
,
6179 irq_handler_t irq_handler
, unsigned long irq_flags
,
6180 struct scsi_host_template
*sht
)
6184 rc
= ata_host_start(host
);
6188 /* Special case for polling mode */
6190 WARN_ON(irq_handler
);
6191 return ata_host_register(host
, sht
);
6194 rc
= devm_request_irq(host
->dev
, irq
, irq_handler
, irq_flags
,
6195 dev_driver_string(host
->dev
), host
);
6199 for (i
= 0; i
< host
->n_ports
; i
++)
6200 ata_port_desc(host
->ports
[i
], "irq %d", irq
);
6202 rc
= ata_host_register(host
, sht
);
6203 /* if failed, just free the IRQ and leave ports alone */
6205 devm_free_irq(host
->dev
, irq
, host
);
6211 * ata_port_detach - Detach ATA port in prepration of device removal
6212 * @ap: ATA port to be detached
6214 * Detach all ATA devices and the associated SCSI devices of @ap;
6215 * then, remove the associated SCSI host. @ap is guaranteed to
6216 * be quiescent on return from this function.
6219 * Kernel thread context (may sleep).
6221 static void ata_port_detach(struct ata_port
*ap
)
6223 unsigned long flags
;
6225 if (!ap
->ops
->error_handler
)
6228 /* tell EH we're leaving & flush EH */
6229 spin_lock_irqsave(ap
->lock
, flags
);
6230 ap
->pflags
|= ATA_PFLAG_UNLOADING
;
6231 ata_port_schedule_eh(ap
);
6232 spin_unlock_irqrestore(ap
->lock
, flags
);
6234 /* wait till EH commits suicide */
6235 ata_port_wait_eh(ap
);
6237 /* it better be dead now */
6238 WARN_ON(!(ap
->pflags
& ATA_PFLAG_UNLOADED
));
6240 cancel_delayed_work_sync(&ap
->hotplug_task
);
6245 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
6246 ata_tlink_delete(&ap
->pmp_link
[i
]);
6248 ata_tport_delete(ap
);
6250 /* remove the associated SCSI host */
6251 scsi_remove_host(ap
->scsi_host
);
6255 * ata_host_detach - Detach all ports of an ATA host
6256 * @host: Host to detach
6258 * Detach all ports of @host.
6261 * Kernel thread context (may sleep).
6263 void ata_host_detach(struct ata_host
*host
)
6267 for (i
= 0; i
< host
->n_ports
; i
++)
6268 ata_port_detach(host
->ports
[i
]);
6270 /* the host is dead now, dissociate ACPI */
6271 ata_acpi_dissociate(host
);
6277 * ata_pci_remove_one - PCI layer callback for device removal
6278 * @pdev: PCI device that was removed
6280 * PCI layer indicates to libata via this hook that hot-unplug or
6281 * module unload event has occurred. Detach all ports. Resource
6282 * release is handled via devres.
6285 * Inherited from PCI layer (may sleep).
6287 void ata_pci_remove_one(struct pci_dev
*pdev
)
6289 struct device
*dev
= &pdev
->dev
;
6290 struct ata_host
*host
= dev_get_drvdata(dev
);
6292 ata_host_detach(host
);
6295 /* move to PCI subsystem */
6296 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
6298 unsigned long tmp
= 0;
6300 switch (bits
->width
) {
6303 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
6309 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
6315 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
6326 return (tmp
== bits
->val
) ? 1 : 0;
6330 void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6332 pci_save_state(pdev
);
6333 pci_disable_device(pdev
);
6335 if (mesg
.event
& PM_EVENT_SLEEP
)
6336 pci_set_power_state(pdev
, PCI_D3hot
);
6339 int ata_pci_device_do_resume(struct pci_dev
*pdev
)
6343 pci_set_power_state(pdev
, PCI_D0
);
6344 pci_restore_state(pdev
);
6346 rc
= pcim_enable_device(pdev
);
6349 "failed to enable device after resume (%d)\n", rc
);
6353 pci_set_master(pdev
);
6357 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
6359 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6362 rc
= ata_host_suspend(host
, mesg
);
6366 ata_pci_device_do_suspend(pdev
, mesg
);
6371 int ata_pci_device_resume(struct pci_dev
*pdev
)
6373 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
6376 rc
= ata_pci_device_do_resume(pdev
);
6378 ata_host_resume(host
);
6381 #endif /* CONFIG_PM */
6383 #endif /* CONFIG_PCI */
6385 static int __init
ata_parse_force_one(char **cur
,
6386 struct ata_force_ent
*force_ent
,
6387 const char **reason
)
6389 /* FIXME: Currently, there's no way to tag init const data and
6390 * using __initdata causes build failure on some versions of
6391 * gcc. Once __initdataconst is implemented, add const to the
6392 * following structure.
6394 static struct ata_force_param force_tbl
[] __initdata
= {
6395 { "40c", .cbl
= ATA_CBL_PATA40
},
6396 { "80c", .cbl
= ATA_CBL_PATA80
},
6397 { "short40c", .cbl
= ATA_CBL_PATA40_SHORT
},
6398 { "unk", .cbl
= ATA_CBL_PATA_UNK
},
6399 { "ign", .cbl
= ATA_CBL_PATA_IGN
},
6400 { "sata", .cbl
= ATA_CBL_SATA
},
6401 { "1.5Gbps", .spd_limit
= 1 },
6402 { "3.0Gbps", .spd_limit
= 2 },
6403 { "noncq", .horkage_on
= ATA_HORKAGE_NONCQ
},
6404 { "ncq", .horkage_off
= ATA_HORKAGE_NONCQ
},
6405 { "dump_id", .horkage_on
= ATA_HORKAGE_DUMP_ID
},
6406 { "pio0", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 0) },
6407 { "pio1", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 1) },
6408 { "pio2", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 2) },
6409 { "pio3", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 3) },
6410 { "pio4", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 4) },
6411 { "pio5", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 5) },
6412 { "pio6", .xfer_mask
= 1 << (ATA_SHIFT_PIO
+ 6) },
6413 { "mwdma0", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 0) },
6414 { "mwdma1", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 1) },
6415 { "mwdma2", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 2) },
6416 { "mwdma3", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 3) },
6417 { "mwdma4", .xfer_mask
= 1 << (ATA_SHIFT_MWDMA
+ 4) },
6418 { "udma0", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6419 { "udma16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6420 { "udma/16", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 0) },
6421 { "udma1", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6422 { "udma25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6423 { "udma/25", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 1) },
6424 { "udma2", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6425 { "udma33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6426 { "udma/33", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 2) },
6427 { "udma3", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6428 { "udma44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6429 { "udma/44", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 3) },
6430 { "udma4", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6431 { "udma66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6432 { "udma/66", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 4) },
6433 { "udma5", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6434 { "udma100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6435 { "udma/100", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 5) },
6436 { "udma6", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6437 { "udma133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6438 { "udma/133", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 6) },
6439 { "udma7", .xfer_mask
= 1 << (ATA_SHIFT_UDMA
+ 7) },
6440 { "nohrst", .lflags
= ATA_LFLAG_NO_HRST
},
6441 { "nosrst", .lflags
= ATA_LFLAG_NO_SRST
},
6442 { "norst", .lflags
= ATA_LFLAG_NO_HRST
| ATA_LFLAG_NO_SRST
},
6443 { "rstonce", .lflags
= ATA_LFLAG_RST_ONCE
},
6445 char *start
= *cur
, *p
= *cur
;
6446 char *id
, *val
, *endp
;
6447 const struct ata_force_param
*match_fp
= NULL
;
6448 int nr_matches
= 0, i
;
6450 /* find where this param ends and update *cur */
6451 while (*p
!= '\0' && *p
!= ',')
6462 p
= strchr(start
, ':');
6464 val
= strstrip(start
);
6469 id
= strstrip(start
);
6470 val
= strstrip(p
+ 1);
6473 p
= strchr(id
, '.');
6476 force_ent
->device
= simple_strtoul(p
, &endp
, 10);
6477 if (p
== endp
|| *endp
!= '\0') {
6478 *reason
= "invalid device";
6483 force_ent
->port
= simple_strtoul(id
, &endp
, 10);
6484 if (p
== endp
|| *endp
!= '\0') {
6485 *reason
= "invalid port/link";
6490 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6491 for (i
= 0; i
< ARRAY_SIZE(force_tbl
); i
++) {
6492 const struct ata_force_param
*fp
= &force_tbl
[i
];
6494 if (strncasecmp(val
, fp
->name
, strlen(val
)))
6500 if (strcasecmp(val
, fp
->name
) == 0) {
6507 *reason
= "unknown value";
6510 if (nr_matches
> 1) {
6511 *reason
= "ambigious value";
6515 force_ent
->param
= *match_fp
;
6520 static void __init
ata_parse_force_param(void)
6522 int idx
= 0, size
= 1;
6523 int last_port
= -1, last_device
= -1;
6524 char *p
, *cur
, *next
;
6526 /* calculate maximum number of params and allocate force_tbl */
6527 for (p
= ata_force_param_buf
; *p
; p
++)
6531 ata_force_tbl
= kzalloc(sizeof(ata_force_tbl
[0]) * size
, GFP_KERNEL
);
6532 if (!ata_force_tbl
) {
6533 printk(KERN_WARNING
"ata: failed to extend force table, "
6534 "libata.force ignored\n");
6538 /* parse and populate the table */
6539 for (cur
= ata_force_param_buf
; *cur
!= '\0'; cur
= next
) {
6540 const char *reason
= "";
6541 struct ata_force_ent te
= { .port
= -1, .device
= -1 };
6544 if (ata_parse_force_one(&next
, &te
, &reason
)) {
6545 printk(KERN_WARNING
"ata: failed to parse force "
6546 "parameter \"%s\" (%s)\n",
6551 if (te
.port
== -1) {
6552 te
.port
= last_port
;
6553 te
.device
= last_device
;
6556 ata_force_tbl
[idx
++] = te
;
6558 last_port
= te
.port
;
6559 last_device
= te
.device
;
6562 ata_force_tbl_size
= idx
;
6565 static int __init
ata_init(void)
6569 ata_parse_force_param();
6571 ata_acpi_register();
6573 rc
= ata_sff_init();
6575 kfree(ata_force_tbl
);
6579 libata_transport_init();
6580 ata_scsi_transport_template
= ata_attach_transport();
6581 if (!ata_scsi_transport_template
) {
6587 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
6594 static void __exit
ata_exit(void)
6596 ata_release_transport(ata_scsi_transport_template
);
6597 libata_transport_exit();
6599 ata_acpi_unregister();
6600 kfree(ata_force_tbl
);
6603 subsys_initcall(ata_init
);
6604 module_exit(ata_exit
);
6606 static DEFINE_RATELIMIT_STATE(ratelimit
, HZ
/ 5, 1);
6608 int ata_ratelimit(void)
6610 return __ratelimit(&ratelimit
);
6614 * ata_msleep - ATA EH owner aware msleep
6615 * @ap: ATA port to attribute the sleep to
6616 * @msecs: duration to sleep in milliseconds
6618 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6619 * ownership is released before going to sleep and reacquired
6620 * after the sleep is complete. IOW, other ports sharing the
6621 * @ap->host will be allowed to own the EH while this task is
6627 void ata_msleep(struct ata_port
*ap
, unsigned int msecs
)
6629 bool owns_eh
= ap
&& ap
->host
->eh_owner
== current
;
6641 * ata_wait_register - wait until register value changes
6642 * @ap: ATA port to wait register for, can be NULL
6643 * @reg: IO-mapped register
6644 * @mask: Mask to apply to read register value
6645 * @val: Wait condition
6646 * @interval: polling interval in milliseconds
6647 * @timeout: timeout in milliseconds
6649 * Waiting for some bits of register to change is a common
6650 * operation for ATA controllers. This function reads 32bit LE
6651 * IO-mapped register @reg and tests for the following condition.
6653 * (*@reg & mask) != val
6655 * If the condition is met, it returns; otherwise, the process is
6656 * repeated after @interval_msec until timeout.
6659 * Kernel thread context (may sleep)
6662 * The final register value.
6664 u32
ata_wait_register(struct ata_port
*ap
, void __iomem
*reg
, u32 mask
, u32 val
,
6665 unsigned long interval
, unsigned long timeout
)
6667 unsigned long deadline
;
6670 tmp
= ioread32(reg
);
6672 /* Calculate timeout _after_ the first read to make sure
6673 * preceding writes reach the controller before starting to
6674 * eat away the timeout.
6676 deadline
= ata_deadline(jiffies
, timeout
);
6678 while ((tmp
& mask
) == val
&& time_before(jiffies
, deadline
)) {
6679 ata_msleep(ap
, interval
);
6680 tmp
= ioread32(reg
);
6689 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd
*qc
)
6691 return AC_ERR_SYSTEM
;
6694 static void ata_dummy_error_handler(struct ata_port
*ap
)
6699 struct ata_port_operations ata_dummy_port_ops
= {
6700 .qc_prep
= ata_noop_qc_prep
,
6701 .qc_issue
= ata_dummy_qc_issue
,
6702 .error_handler
= ata_dummy_error_handler
,
6703 .sched_eh
= ata_std_sched_eh
,
6704 .end_eh
= ata_std_end_eh
,
6707 const struct ata_port_info ata_dummy_port_info
= {
6708 .port_ops
= &ata_dummy_port_ops
,
6712 * Utility print functions
6714 int ata_port_printk(const struct ata_port
*ap
, const char *level
,
6715 const char *fmt
, ...)
6717 struct va_format vaf
;
6721 va_start(args
, fmt
);
6726 r
= printk("%sata%u: %pV", level
, ap
->print_id
, &vaf
);
6732 EXPORT_SYMBOL(ata_port_printk
);
6734 int ata_link_printk(const struct ata_link
*link
, const char *level
,
6735 const char *fmt
, ...)
6737 struct va_format vaf
;
6741 va_start(args
, fmt
);
6746 if (sata_pmp_attached(link
->ap
) || link
->ap
->slave_link
)
6747 r
= printk("%sata%u.%02u: %pV",
6748 level
, link
->ap
->print_id
, link
->pmp
, &vaf
);
6750 r
= printk("%sata%u: %pV",
6751 level
, link
->ap
->print_id
, &vaf
);
6757 EXPORT_SYMBOL(ata_link_printk
);
6759 int ata_dev_printk(const struct ata_device
*dev
, const char *level
,
6760 const char *fmt
, ...)
6762 struct va_format vaf
;
6766 va_start(args
, fmt
);
6771 r
= printk("%sata%u.%02u: %pV",
6772 level
, dev
->link
->ap
->print_id
, dev
->link
->pmp
+ dev
->devno
,
6779 EXPORT_SYMBOL(ata_dev_printk
);
6781 void ata_print_version(const struct device
*dev
, const char *version
)
6783 dev_printk(KERN_DEBUG
, dev
, "version %s\n", version
);
6785 EXPORT_SYMBOL(ata_print_version
);
6788 * libata is essentially a library of internal helper functions for
6789 * low-level ATA host controller drivers. As such, the API/ABI is
6790 * likely to change as new drivers are added and updated.
6791 * Do not depend on ABI/API stability.
6793 EXPORT_SYMBOL_GPL(sata_deb_timing_normal
);
6794 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug
);
6795 EXPORT_SYMBOL_GPL(sata_deb_timing_long
);
6796 EXPORT_SYMBOL_GPL(ata_base_port_ops
);
6797 EXPORT_SYMBOL_GPL(sata_port_ops
);
6798 EXPORT_SYMBOL_GPL(ata_dummy_port_ops
);
6799 EXPORT_SYMBOL_GPL(ata_dummy_port_info
);
6800 EXPORT_SYMBOL_GPL(ata_link_next
);
6801 EXPORT_SYMBOL_GPL(ata_dev_next
);
6802 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
6803 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity
);
6804 EXPORT_SYMBOL_GPL(ata_host_init
);
6805 EXPORT_SYMBOL_GPL(ata_host_alloc
);
6806 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo
);
6807 EXPORT_SYMBOL_GPL(ata_slave_link_init
);
6808 EXPORT_SYMBOL_GPL(ata_host_start
);
6809 EXPORT_SYMBOL_GPL(ata_host_register
);
6810 EXPORT_SYMBOL_GPL(ata_host_activate
);
6811 EXPORT_SYMBOL_GPL(ata_host_detach
);
6812 EXPORT_SYMBOL_GPL(ata_sg_init
);
6813 EXPORT_SYMBOL_GPL(ata_qc_complete
);
6814 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple
);
6815 EXPORT_SYMBOL_GPL(atapi_cmd_type
);
6816 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
6817 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
6818 EXPORT_SYMBOL_GPL(ata_pack_xfermask
);
6819 EXPORT_SYMBOL_GPL(ata_unpack_xfermask
);
6820 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode
);
6821 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask
);
6822 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift
);
6823 EXPORT_SYMBOL_GPL(ata_mode_string
);
6824 EXPORT_SYMBOL_GPL(ata_id_xfermask
);
6825 EXPORT_SYMBOL_GPL(ata_do_set_mode
);
6826 EXPORT_SYMBOL_GPL(ata_std_qc_defer
);
6827 EXPORT_SYMBOL_GPL(ata_noop_qc_prep
);
6828 EXPORT_SYMBOL_GPL(ata_dev_disable
);
6829 EXPORT_SYMBOL_GPL(sata_set_spd
);
6830 EXPORT_SYMBOL_GPL(ata_wait_after_reset
);
6831 EXPORT_SYMBOL_GPL(sata_link_debounce
);
6832 EXPORT_SYMBOL_GPL(sata_link_resume
);
6833 EXPORT_SYMBOL_GPL(sata_link_scr_lpm
);
6834 EXPORT_SYMBOL_GPL(ata_std_prereset
);
6835 EXPORT_SYMBOL_GPL(sata_link_hardreset
);
6836 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
6837 EXPORT_SYMBOL_GPL(ata_std_postreset
);
6838 EXPORT_SYMBOL_GPL(ata_dev_classify
);
6839 EXPORT_SYMBOL_GPL(ata_dev_pair
);
6840 EXPORT_SYMBOL_GPL(ata_ratelimit
);
6841 EXPORT_SYMBOL_GPL(ata_msleep
);
6842 EXPORT_SYMBOL_GPL(ata_wait_register
);
6843 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
6844 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
6845 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy
);
6846 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth
);
6847 EXPORT_SYMBOL_GPL(__ata_change_queue_depth
);
6848 EXPORT_SYMBOL_GPL(sata_scr_valid
);
6849 EXPORT_SYMBOL_GPL(sata_scr_read
);
6850 EXPORT_SYMBOL_GPL(sata_scr_write
);
6851 EXPORT_SYMBOL_GPL(sata_scr_write_flush
);
6852 EXPORT_SYMBOL_GPL(ata_link_online
);
6853 EXPORT_SYMBOL_GPL(ata_link_offline
);
6855 EXPORT_SYMBOL_GPL(ata_host_suspend
);
6856 EXPORT_SYMBOL_GPL(ata_host_resume
);
6857 #endif /* CONFIG_PM */
6858 EXPORT_SYMBOL_GPL(ata_id_string
);
6859 EXPORT_SYMBOL_GPL(ata_id_c_string
);
6860 EXPORT_SYMBOL_GPL(ata_do_dev_read_id
);
6861 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
6863 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
6864 EXPORT_SYMBOL_GPL(ata_timing_find_mode
);
6865 EXPORT_SYMBOL_GPL(ata_timing_compute
);
6866 EXPORT_SYMBOL_GPL(ata_timing_merge
);
6867 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode
);
6870 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
6871 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
6873 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend
);
6874 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume
);
6875 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
6876 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
6877 #endif /* CONFIG_PM */
6878 #endif /* CONFIG_PCI */
6880 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc
);
6881 EXPORT_SYMBOL_GPL(ata_ehi_push_desc
);
6882 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc
);
6883 EXPORT_SYMBOL_GPL(ata_port_desc
);
6885 EXPORT_SYMBOL_GPL(ata_port_pbar_desc
);
6886 #endif /* CONFIG_PCI */
6887 EXPORT_SYMBOL_GPL(ata_port_schedule_eh
);
6888 EXPORT_SYMBOL_GPL(ata_link_abort
);
6889 EXPORT_SYMBOL_GPL(ata_port_abort
);
6890 EXPORT_SYMBOL_GPL(ata_port_freeze
);
6891 EXPORT_SYMBOL_GPL(sata_async_notification
);
6892 EXPORT_SYMBOL_GPL(ata_eh_freeze_port
);
6893 EXPORT_SYMBOL_GPL(ata_eh_thaw_port
);
6894 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
6895 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
6896 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error
);
6897 EXPORT_SYMBOL_GPL(ata_do_eh
);
6898 EXPORT_SYMBOL_GPL(ata_std_error_handler
);
6900 EXPORT_SYMBOL_GPL(ata_cable_40wire
);
6901 EXPORT_SYMBOL_GPL(ata_cable_80wire
);
6902 EXPORT_SYMBOL_GPL(ata_cable_unknown
);
6903 EXPORT_SYMBOL_GPL(ata_cable_ignore
);
6904 EXPORT_SYMBOL_GPL(ata_cable_sata
);